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 # Whether to include project list on the gitweb front page; 0 means yes,
 156 # 1 means no list but show tag cloud if enabled (all projects still need
 157 # to be scanned), 2 means no list and no tag cloud (very fast)
 158 our $frontpage_no_project_list = 0;
 159
 160 # information about snapshot formats that gitweb is capable of serving
 161 our %known_snapshot_formats = (
 162         # name => {
 163         #       'display' => display name,
 164         #       'type' => mime type,
 165         #       'suffix' => filename suffix,
 166         #       'format' => --format for git-archive,
 167         #       'compressor' => [compressor command and arguments]
 168         #                       (array reference, optional)
 169         #       'disabled' => boolean (optional)}
 170         #
 171         'tgz' => {
 172                 'display' => 'tar.gz',
 173                 'type' => 'application/x-gzip',
 174                 'suffix' => '.tar.gz',
 175                 'format' => 'tar',
 176                 'compressor' => ['gzip']},
 177
 178         'tbz2' => {
 179                 'display' => 'tar.bz2',
 180                 'type' => 'application/x-bzip2',
 181                 'suffix' => '.tar.bz2',
 182                 'format' => 'tar',
 183                 'compressor' => ['bzip2']},
 184
 185         'txz' => {
 186                 'display' => 'tar.xz',
 187                 'type' => 'application/x-xz',
 188                 'suffix' => '.tar.xz',
 189                 'format' => 'tar',
 190                 'compressor' => ['xz'],
 191                 'disabled' => 1},
 192
 193         'zip' => {
 194                 'display' => 'zip',
 195                 'type' => 'application/x-zip',
 196                 'suffix' => '.zip',
 197                 'format' => 'zip'},
 198 );
 199
 200 # Aliases so we understand old gitweb.snapshot values in repository
 201 # configuration.
 202 our %known_snapshot_format_aliases = (
 203         'gzip'  => 'tgz',
 204         'bzip2' => 'tbz2',
 205         'xz'    => 'txz',
 206
 207         # backward compatibility: legacy gitweb config support
 208         'x-gzip' => undef, 'gz' => undef,
 209         'x-bzip2' => undef, 'bz2' => undef,
 210         'x-zip' => undef, '' => undef,
 211 );
 212
 213 # Pixel sizes for icons and avatars. If the default font sizes or lineheights
 214 # are changed, it may be appropriate to change these values too via
 215 # $GITWEB_CONFIG.
 216 our %avatar_size = (
 217         'default' => 16,
 218         'double'  => 32
 219 );
 220
 221 # You define site-wide feature defaults here; override them with
 222 # $GITWEB_CONFIG as necessary.
 223 our %feature = (
 224         # feature => {
 225         #       'sub' => feature-sub (subroutine),
 226         #       'override' => allow-override (boolean),
 227         #       'default' => [ default options...] (array reference)}
 228         #
 229         # if feature is overridable (it means that allow-override has true value),
 230         # then feature-sub will be called with default options as parameters;
 231         # return value of feature-sub indicates if to enable specified feature
 232         #
 233         # if there is no 'sub' key (no feature-sub), then feature cannot be
 234         # overriden
 235         #
 236         # use gitweb_get_feature(<feature>) to retrieve the <feature> value
 237         # (an array) or gitweb_check_feature(<feature>) to check if <feature>
 238         # is enabled
 239
 240         # Enable the 'blame' blob view, showing the last commit that modified
 241         # each line in the file. This can be very CPU-intensive.
 242
 243         # To enable system wide have in $GITWEB_CONFIG
 244         # $feature{'blame'}{'default'} = [1];
 245         # To have project specific config enable override in $GITWEB_CONFIG
 246         # $feature{'blame'}{'override'} = 1;
 247         # and in project config gitweb.blame = 0|1;
 248         'blame' => {
 249                 'sub' => sub { feature_bool('blame', @_) },
 250                 'override' => 0,
 251                 'default' => [0]},
 252
 253         # Enable the 'snapshot' link, providing a compressed archive of any
 254         # tree. This can potentially generate high traffic if you have large
 255         # project.
 256
 257         # Value is a list of formats defined in %known_snapshot_formats that
 258         # you wish to offer.
 259         # To disable system wide have in $GITWEB_CONFIG
 260         # $feature{'snapshot'}{'default'} = [];
 261         # To have project specific config enable override in $GITWEB_CONFIG
 262         # $feature{'snapshot'}{'override'} = 1;
 263         # and in project config, a comma-separated list of formats or "none"
 264         # to disable.  Example: gitweb.snapshot = tbz2,zip;
 265         'snapshot' => {
 266                 'sub' => \&feature_snapshot,
 267                 'override' => 0,
 268                 'default' => ['tgz']},
 269
 270         # Enable text search, which will list the commits which match author,
 271         # committer or commit text to a given string.  Enabled by default.
 272         # Project specific override is not supported.
 273         'search' => {
 274                 'override' => 0,
 275                 'default' => [1]},
 276
 277         # Enable grep search, which will list the files in currently selected
 278         # tree containing the given string. Enabled by default. This can be
 279         # potentially CPU-intensive, of course.
 280
 281         # To enable system wide have in $GITWEB_CONFIG
 282         # $feature{'grep'}{'default'} = [1];
 283         # To have project specific config enable override in $GITWEB_CONFIG
 284         # $feature{'grep'}{'override'} = 1;
 285         # and in project config gitweb.grep = 0|1;
 286         'grep' => {
 287                 'sub' => sub { feature_bool('grep', @_) },
 288                 'override' => 0,
 289                 'default' => [1]},
 290
 291         # Enable the pickaxe search, which will list the commits that modified
 292         # a given string in a file. This can be practical and quite faster
 293         # alternative to 'blame', but still potentially CPU-intensive.
 294
 295         # To enable system wide have in $GITWEB_CONFIG
 296         # $feature{'pickaxe'}{'default'} = [1];
 297         # To have project specific config enable override in $GITWEB_CONFIG
 298         # $feature{'pickaxe'}{'override'} = 1;
 299         # and in project config gitweb.pickaxe = 0|1;
 300         'pickaxe' => {
 301                 'sub' => sub { feature_bool('pickaxe', @_) },
 302                 'override' => 0,
 303                 'default' => [1]},
 304
 305         # Enable showing size of blobs in a 'tree' view, in a separate
 306         # column, similar to what 'ls -l' does.  This cost a bit of IO.
 307
 308         # To disable system wide have in $GITWEB_CONFIG
 309         # $feature{'show-sizes'}{'default'} = [0];
 310         # To have project specific config enable override in $GITWEB_CONFIG
 311         # $feature{'show-sizes'}{'override'} = 1;
 312         # and in project config gitweb.showsizes = 0|1;
 313         'show-sizes' => {
 314                 'sub' => sub { feature_bool('showsizes', @_) },
 315                 'override' => 0,
 316                 'default' => [1]},
 317
 318         # Make gitweb use an alternative format of the URLs which can be
 319         # more readable and natural-looking: project name is embedded
 320         # directly in the path and the query string contains other
 321         # auxiliary information. All gitweb installations recognize
 322         # URL in either format; this configures in which formats gitweb
 323         # generates links.
 324
 325         # To enable system wide have in $GITWEB_CONFIG
 326         # $feature{'pathinfo'}{'default'} = [1];
 327         # Project specific override is not supported.
 328
 329         # Note that you will need to change the default location of CSS,
 330         # favicon, logo and possibly other files to an absolute URL. Also,
 331         # if gitweb.cgi serves as your indexfile, you will need to force
 332         # $my_uri to contain the script name in your $GITWEB_CONFIG.
 333         'pathinfo' => {
 334                 'override' => 0,
 335                 'default' => [0]},
 336
 337         # Make gitweb consider projects in project root subdirectories
 338         # to be forks of existing projects. Given project $projname.git,
 339         # projects matching $projname/*.git will not be shown in the main
 340         # projects list, instead a '+' mark will be added to $projname
 341         # there and a 'forks' view will be enabled for the project, listing
 342         # all the forks. If project list is taken from a file, forks have
 343         # to be listed after the main project.
 344
 345         # To enable system wide have in $GITWEB_CONFIG
 346         # $feature{'forks'}{'default'} = [1];
 347         # Project specific override is not supported.
 348         'forks' => {
 349                 'override' => 0,
 350                 'default' => [0]},
 351
 352         # Insert custom links to the action bar of all project pages.
 353         # This enables you mainly to link to third-party scripts integrating
 354         # into gitweb; e.g. git-browser for graphical history representation
 355         # or custom web-based repository administration interface.
 356
 357         # The 'default' value consists of a list of triplets in the form
 358         # (label, link, position) where position is the label after which
 359         # to insert the link and link is a format string where %n expands
 360         # to the project name, %f to the project path within the filesystem,
 361         # %h to the current hash (h gitweb parameter) and %b to the current
 362         # hash base (hb gitweb parameter); %% expands to %.
 363
 364         # To enable system wide have in $GITWEB_CONFIG e.g.
 365         # $feature{'actions'}{'default'} = [('graphiclog',
 366         #       '/git-browser/by-commit.html?r=%n', 'summary')];
 367         # Project specific override is not supported.
 368         'actions' => {
 369                 'override' => 0,
 370                 'default' => []},
 371
 372         # Allow gitweb scan project content tags described in ctags/
 373         # of project repository, and display the popular Web 2.0-ish
 374         # "tag cloud" near the project list. Note that this is something
 375         # COMPLETELY different from the normal Git tags.
 376
 377         # gitweb by itself can show existing tags, but it does not handle
 378         # tagging itself; you need an external application for that.
 379         # For an example script, check Girocco's cgi/tagproj.cgi.
 380         # You may want to install the HTML::TagCloud Perl module to get
 381         # a pretty tag cloud instead of just a list of tags.
 382
 383         # To enable system wide have in $GITWEB_CONFIG
 384         # $feature{'ctags'}{'default'} = ['path_to_tag_script'];
 385         # Project specific override is not supported.
 386         'ctags' => {
 387                 'override' => 0,
 388                 'default' => [0]},
 389
 390         # The maximum number of patches in a patchset generated in patch
 391         # view. Set this to 0 or undef to disable patch view, or to a
 392         # negative number to remove any limit.
 393
 394         # To disable system wide have in $GITWEB_CONFIG
 395         # $feature{'patches'}{'default'} = [0];
 396         # To have project specific config enable override in $GITWEB_CONFIG
 397         # $feature{'patches'}{'override'} = 1;
 398         # and in project config gitweb.patches = 0|n;
 399         # where n is the maximum number of patches allowed in a patchset.
 400         'patches' => {
 401                 'sub' => \&feature_patches,
 402                 'override' => 0,
 403                 'default' => [16]},
 404
 405         # Avatar support. When this feature is enabled, views such as
 406         # shortlog or commit will display an avatar associated with
 407         # the email of the committer(s) and/or author(s).
 408
 409         # Currently available providers are gravatar and picon.
 410         # If an unknown provider is specified, the feature is disabled.
 411
 412         # Gravatar depends on Digest::MD5.
 413         # Picon currently relies on the indiana.edu database.
 414
 415         # To enable system wide have in $GITWEB_CONFIG
 416         # $feature{'avatar'}{'default'} = ['<provider>'];
 417         # where <provider> is either gravatar or picon.
 418         # To have project specific config enable override in $GITWEB_CONFIG
 419         # $feature{'avatar'}{'override'} = 1;
 420         # and in project config gitweb.avatar = <provider>;
 421         'avatar' => {
 422                 'sub' => \&feature_avatar,
 423                 'override' => 0,
 424                 'default' => ['']},
 425 );
 426
 427 sub gitweb_get_feature {
 428         my ($name) = @_;
 429         return unless exists $feature{$name};
 430         my ($sub, $override, @defaults) = (
 431                 $feature{$name}{'sub'},
 432                 $feature{$name}{'override'},
 433                 @{$feature{$name}{'default'}});
 434         if (!$override) { return @defaults; }
 435         if (!defined $sub) {
 436                 warn "feature $name is not overridable";
 437                 return @defaults;
 438         }
 439         return $sub->(@defaults);
 440 }
 441
 442 # A wrapper to check if a given feature is enabled.
 443 # With this, you can say
 444 #
 445 #   my $bool_feat = gitweb_check_feature('bool_feat');
 446 #   gitweb_check_feature('bool_feat') or somecode;
 447 #
 448 # instead of
 449 #
 450 #   my ($bool_feat) = gitweb_get_feature('bool_feat');
 451 #   (gitweb_get_feature('bool_feat'))[0] or somecode;
 452 #
 453 sub gitweb_check_feature {
 454         return (gitweb_get_feature(@_))[0];
 455 }
 456
 457
 458 sub feature_bool {
 459         my $key = shift;
 460         my ($val) = git_get_project_config($key, '--bool');
 461
 462         if (!defined $val) {
 463                 return ($_[0]);
 464         } elsif ($val eq 'true') {
 465                 return (1);
 466         } elsif ($val eq 'false') {
 467                 return (0);
 468         }
 469 }
 470
 471 sub feature_snapshot {
 472         my (@fmts) = @_;
 473
 474         my ($val) = git_get_project_config('snapshot');
 475
 476         if ($val) {
 477                 @fmts = ($val eq 'none' ? () : split /\s*[,\s]\s*/, $val);
 478         }
 479
 480         return @fmts;
 481 }
 482
 483 sub feature_patches {
 484         my @val = (git_get_project_config('patches', '--int'));
 485
 486         if (@val) {
 487                 return @val;
 488         }
 489
 490         return ($_[0]);
 491 }
 492
 493 sub feature_avatar {
 494         my @val = (git_get_project_config('avatar'));
 495
 496         return @val ? @val : @_;
 497 }
 498
 499 # checking HEAD file with -e is fragile if the repository was
 500 # initialized long time ago (i.e. symlink HEAD) and was pack-ref'ed
 501 # and then pruned.
 502 sub check_head_link {
 503         my ($dir) = @_;
 504         my $headfile = "$dir/HEAD";
 505         return ((-e $headfile) ||
 506                 (-l $headfile && readlink($headfile) =~ /^refs\/heads\//));
 507 }
 508
 509 sub check_export_ok {
 510         my ($dir) = @_;
 511         return (check_head_link($dir) &&
 512                 (!$export_ok || -e "$dir/$export_ok") &&
 513                 (!$export_auth_hook || $export_auth_hook->($dir)));
 514 }
 515
 516 # process alternate names for backward compatibility
 517 # filter out unsupported (unknown) snapshot formats
 518 sub filter_snapshot_fmts {
 519         my @fmts = @_;
 520
 521         @fmts = map {
 522                 exists $known_snapshot_format_aliases{$_} ?
 523                        $known_snapshot_format_aliases{$_} : $_} @fmts;
 524         @fmts = grep {
 525                 exists $known_snapshot_formats{$_} &&
 526                 !$known_snapshot_formats{$_}{'disabled'}} @fmts;
 527 }
 528
 529 our $GITWEB_CONFIG = $ENV{'GITWEB_CONFIG'} || "++GITWEB_CONFIG++";
 530 if (-e $GITWEB_CONFIG) {
 531         do $GITWEB_CONFIG;
 532 } else {
 533         our $GITWEB_CONFIG_SYSTEM = $ENV{'GITWEB_CONFIG_SYSTEM'} || "++GITWEB_CONFIG_SYSTEM++";
 534         do $GITWEB_CONFIG_SYSTEM if -e $GITWEB_CONFIG_SYSTEM;
 535 }
 536
 537 # version of the core git binary
 538 our $git_version = qx("$GIT" --version) =~ m/git version (.*)$/ ? $1 : "unknown";
 539
 540 $projects_list ||= $projectroot;
 541
 542 # ======================================================================
 543 # input validation and dispatch
 544
 545 # input parameters can be collected from a variety of sources (presently, CGI
 546 # and PATH_INFO), so we define an %input_params hash that collects them all
 547 # together during validation: this allows subsequent uses (e.g. href()) to be
 548 # agnostic of the parameter origin
 549
 550 our %input_params = ();
 551
 552 # input parameters are stored with the long parameter name as key. This will
 553 # also be used in the href subroutine to convert parameters to their CGI
 554 # equivalent, and since the href() usage is the most frequent one, we store
 555 # the name -> CGI key mapping here, instead of the reverse.
 556 #
 557 # XXX: Warning: If you touch this, check the search form for updating,
 558 # too.
 559
 560 our @cgi_param_mapping = (
 561         project => "p",
 562         action => "a",
 563         file_name => "f",
 564         file_parent => "fp",
 565         hash => "h",
 566         hash_parent => "hp",
 567         hash_base => "hb",
 568         hash_parent_base => "hpb",
 569         page => "pg",
 570         order => "o",
 571         searchtext => "s",
 572         searchtype => "st",
 573         snapshot_format => "sf",
 574         ctag_filter => 't',
 575         extra_options => "opt",
 576         search_use_regexp => "sr",
 577 );
 578 our %cgi_param_mapping = @cgi_param_mapping;
 579
 580 # we will also need to know the possible actions, for validation
 581 our %actions = (
 582         "blame" => \&git_blame,
 583         "blobdiff" => \&git_blobdiff,
 584         "blobdiff_plain" => \&git_blobdiff_plain,
 585         "blob" => \&git_blob,
 586         "blob_plain" => \&git_blob_plain,
 587         "commitdiff" => \&git_commitdiff,
 588         "commitdiff_plain" => \&git_commitdiff_plain,
 589         "commit" => \&git_commit,
 590         "forks" => \&git_forks,
 591         "heads" => \&git_heads,
 592         "history" => \&git_history,
 593         "log" => \&git_log,
 594         "patch" => \&git_patch,
 595         "patches" => \&git_patches,
 596         "rss" => \&git_rss,
 597         "atom" => \&git_atom,
 598         "search" => \&git_search,
 599         "search_help" => \&git_search_help,
 600         "shortlog" => \&git_shortlog,
 601         "summary" => \&git_summary,
 602         "tag" => \&git_tag,
 603         "tags" => \&git_tags,
 604         "tree" => \&git_tree,
 605         "snapshot" => \&git_snapshot,
 606         "object" => \&git_object,
 607         # those below don't need $project
 608         "opml" => \&git_opml,
 609         "frontpage" => \&git_frontpage,
 610         "project_list" => \&git_project_list,
 611         "project_index" => \&git_project_index,
 612 );
 613
 614 # finally, we have the hash of allowed extra_options for the commands that
 615 # allow them
 616 our %allowed_options = (
 617         "--no-merges" => [ qw(rss atom log shortlog history) ],
 618 );
 619
 620 # fill %input_params with the CGI parameters. All values except for 'opt'
 621 # should be single values, but opt can be an array. We should probably
 622 # build an array of parameters that can be multi-valued, but since for the time
 623 # being it's only this one, we just single it out
 624 while (my ($name, $symbol) = each %cgi_param_mapping) {
 625         if ($symbol eq 'opt') {
 626                 $input_params{$name} = [ $cgi->param($symbol) ];
 627         } else {
 628                 $input_params{$name} = $cgi->param($symbol);
 629         }
 630 }
 631
 632 # Backwards compatibility - by_tag= <=> t=
 633 if ($cgi->param('by_tag')) {
 634         $input_params{'ctag_filter'} = $cgi->param('by_tag');
 635 }
 636
 637 # now read PATH_INFO and update the parameter list for missing parameters
 638 sub evaluate_path_info {
 639         return if defined $input_params{'project'};
 640         return if !$path_info;
 641         $path_info =~ s,^/+,,;
 642         return if !$path_info;
 643
 644         # find which part of PATH_INFO is project
 645         my $project = $path_info;
 646         $project =~ s,/+$,,;
 647         while ($project && !check_head_link("$projectroot/$project")) {
 648                 $project =~ s,/*[^/]*$,,;
 649         }
 650         return unless $project;
 651         $input_params{'project'} = $project;
 652
 653         # do not change any parameters if an action is given using the query string
 654         return if $input_params{'action'};
 655         $path_info =~ s,^\Q$project\E/*,,;
 656
 657         # next, check if we have an action
 658         my $action = $path_info;
 659         $action =~ s,/.*$,,;
 660         if (exists $actions{$action}) {
 661                 $path_info =~ s,^$action/*,,;
 662                 $input_params{'action'} = $action;
 663         }
 664
 665         # list of actions that want hash_base instead of hash, but can have no
 666         # pathname (f) parameter
 667         my @wants_base = (
 668                 'tree',
 669                 'history',
 670         );
 671
 672         # we want to catch
 673         # [$hash_parent_base[:$file_parent]..]$hash_parent[:$file_name]
 674         my ($parentrefname, $parentpathname, $refname, $pathname) =
 675                 ($path_info =~ /^(?:(.+?)(?::(.+))?\.\.)?(.+?)(?::(.+))?$/);
 676
 677         # first, analyze the 'current' part
 678         if (defined $pathname) {
 679                 # we got "branch:filename" or "branch:dir/"
 680                 # we could use git_get_type(branch:pathname), but:
 681                 # - it needs $git_dir
 682                 # - it does a git() call
 683                 # - the convention of terminating directories with a slash
 684                 #   makes it superfluous
 685                 # - embedding the action in the PATH_INFO would make it even
 686                 #   more superfluous
 687                 $pathname =~ s,^/+,,;
 688                 if (!$pathname || substr($pathname, -1) eq "/") {
 689                         $input_params{'action'} ||= "tree";
 690                         $pathname =~ s,/$,,;
 691                 } else {
 692                         # the default action depends on whether we had parent info
 693                         # or not
 694                         if ($parentrefname) {
 695                                 $input_params{'action'} ||= "blobdiff_plain";
 696                         } else {
 697                                 $input_params{'action'} ||= "blob_plain";
 698                         }
 699                 }
 700                 $input_params{'hash_base'} ||= $refname;
 701                 $input_params{'file_name'} ||= $pathname;
 702         } elsif (defined $refname) {
 703                 # we got "branch". In this case we have to choose if we have to
 704                 # set hash or hash_base.
 705                 #
 706                 # Most of the actions without a pathname only want hash to be
 707                 # set, except for the ones specified in @wants_base that want
 708                 # hash_base instead. It should also be noted that hand-crafted
 709                 # links having 'history' as an action and no pathname or hash
 710                 # set will fail, but that happens regardless of PATH_INFO.
 711                 $input_params{'action'} ||= "shortlog";
 712                 if (grep { $_ eq $input_params{'action'} } @wants_base) {
 713                         $input_params{'hash_base'} ||= $refname;
 714                 } else {
 715                         $input_params{'hash'} ||= $refname;
 716                 }
 717         }
 718
 719         # next, handle the 'parent' part, if present
 720         if (defined $parentrefname) {
 721                 # a missing pathspec defaults to the 'current' filename, allowing e.g.
 722                 # someproject/blobdiff/oldrev..newrev:/filename
 723                 if ($parentpathname) {
 724                         $parentpathname =~ s,^/+,,;
 725                         $parentpathname =~ s,/$,,;
 726                         $input_params{'file_parent'} ||= $parentpathname;
 727                 } else {
 728                         $input_params{'file_parent'} ||= $input_params{'file_name'};
 729                 }
 730                 # we assume that hash_parent_base is wanted if a path was specified,
 731                 # or if the action wants hash_base instead of hash
 732                 if (defined $input_params{'file_parent'} ||
 733                         grep { $_ eq $input_params{'action'} } @wants_base) {
 734                         $input_params{'hash_parent_base'} ||= $parentrefname;
 735                 } else {
 736                         $input_params{'hash_parent'} ||= $parentrefname;
 737                 }
 738         }
 739
 740         # for the snapshot action, we allow URLs in the form
 741         # $project/snapshot/$hash.ext
 742         # where .ext determines the snapshot and gets removed from the
 743         # passed $refname to provide the $hash.
 744         #
 745         # To be able to tell that $refname includes the format extension, we
 746         # require the following two conditions to be satisfied:
 747         # - the hash input parameter MUST have been set from the $refname part
 748         #   of the URL (i.e. they must be equal)
 749         # - the snapshot format MUST NOT have been defined already (e.g. from
 750         #   CGI parameter sf)
 751         # It's also useless to try any matching unless $refname has a dot,
 752         # so we check for that too
 753         if (defined $input_params{'action'} &&
 754                 $input_params{'action'} eq 'snapshot' &&
 755                 defined $refname && index($refname, '.') != -1 &&
 756                 $refname eq $input_params{'hash'} &&
 757                 !defined $input_params{'snapshot_format'}) {
 758                 # We loop over the known snapshot formats, checking for
 759                 # extensions. Allowed extensions are both the defined suffix
 760                 # (which includes the initial dot already) and the snapshot
 761                 # format key itself, with a prepended dot
 762                 while (my ($fmt, $opt) = each %known_snapshot_formats) {
 763                         my $hash = $refname;
 764                         unless ($hash =~ s/(\Q$opt->{'suffix'}\E|\Q.$fmt\E)$//) {
 765                                 next;
 766                         }
 767                         my $sfx = $1;
 768                         # a valid suffix was found, so set the snapshot format
 769                         # and reset the hash parameter
 770                         $input_params{'snapshot_format'} = $fmt;
 771                         $input_params{'hash'} = $hash;
 772                         # we also set the format suffix to the one requested
 773                         # in the URL: this way a request for e.g. .tgz returns
 774                         # a .tgz instead of a .tar.gz
 775                         $known_snapshot_formats{$fmt}{'suffix'} = $sfx;
 776                         last;
 777                 }
 778         }
 779 }
 780 evaluate_path_info();
 781
 782 our $action = $input_params{'action'};
 783 if (defined $action) {
 784         if (!validate_action($action)) {
 785                 die_error(400, "Invalid action parameter");
 786         }
 787 }
 788
 789 # parameters which are pathnames
 790 our $project = $input_params{'project'};
 791 if (defined $project) {
 792         if (!validate_project($project)) {
 793                 undef $project;
 794                 die_error(404, "No such project");
 795         }
 796 }
 797
 798 our $file_name = $input_params{'file_name'};
 799 if (defined $file_name) {
 800         if (!validate_pathname($file_name)) {
 801                 die_error(400, "Invalid file parameter");
 802         }
 803 }
 804
 805 our $file_parent = $input_params{'file_parent'};
 806 if (defined $file_parent) {
 807         if (!validate_pathname($file_parent)) {
 808                 die_error(400, "Invalid file parent parameter");
 809         }
 810 }
 811
 812 # parameters which are refnames
 813 our $hash = $input_params{'hash'};
 814 if (defined $hash) {
 815         if (!validate_refname($hash)) {
 816                 die_error(400, "Invalid hash parameter");
 817         }
 818 }
 819
 820 our $hash_parent = $input_params{'hash_parent'};
 821 if (defined $hash_parent) {
 822         if (!validate_refname($hash_parent)) {
 823                 die_error(400, "Invalid hash parent parameter");
 824         }
 825 }
 826
 827 our $hash_base = $input_params{'hash_base'};
 828 if (defined $hash_base) {
 829         if (!validate_refname($hash_base)) {
 830                 die_error(400, "Invalid hash base parameter");
 831         }
 832 }
 833
 834 our @extra_options = @{$input_params{'extra_options'}};
 835 # @extra_options is always defined, since it can only be (currently) set from
 836 # CGI, and $cgi->param() returns the empty array in array context if the param
 837 # is not set
 838 foreach my $opt (@extra_options) {
 839         if (not exists $allowed_options{$opt}) {
 840                 die_error(400, "Invalid option parameter");
 841         }
 842         if (not grep(/^$action$/, @{$allowed_options{$opt}})) {
 843                 die_error(400, "Invalid option parameter for this action");
 844         }
 845 }
 846
 847 our $hash_parent_base = $input_params{'hash_parent_base'};
 848 if (defined $hash_parent_base) {
 849         if (!validate_refname($hash_parent_base)) {
 850                 die_error(400, "Invalid hash parent base parameter");
 851         }
 852 }
 853
 854 # other parameters
 855 our $page = $input_params{'page'};
 856 if (defined $page) {
 857         if ($page =~ m/[^0-9]/) {
 858                 die_error(400, "Invalid page parameter");
 859         }
 860 }
 861
 862 our $searchtype = $input_params{'searchtype'};
 863 if (defined $searchtype) {
 864         if ($searchtype =~ m/[^a-z]/) {
 865                 die_error(400, "Invalid searchtype parameter");
 866         }
 867 }
 868
 869 our $search_use_regexp = $input_params{'search_use_regexp'};
 870
 871 our $searchtext = $input_params{'searchtext'};
 872 our $search_regexp;
 873 if (defined $searchtext) {
 874         if (length($searchtext) < 2) {
 875                 die_error(403, "At least two characters are required for search parameter");
 876         }
 877         $search_regexp = $search_use_regexp ? $searchtext : quotemeta $searchtext;
 878 }
 879
 880 # path to the current git repository
 881 our $git_dir;
 882 $git_dir = "$projectroot/$project" if $project;
 883
 884 # list of supported snapshot formats
 885 our @snapshot_fmts = gitweb_get_feature('snapshot');
 886 @snapshot_fmts = filter_snapshot_fmts(@snapshot_fmts);
 887
 888 # check that the avatar feature is set to a known provider name,
 889 # and for each provider check if the dependencies are satisfied.
 890 # if the provider name is invalid or the dependencies are not met,
 891 # reset $git_avatar to the empty string.
 892 our ($git_avatar) = gitweb_get_feature('avatar');
 893 if ($git_avatar eq 'gravatar') {
 894         $git_avatar = '' unless (eval { require Digest::MD5; 1; });
 895 } elsif ($git_avatar eq 'picon') {
 896         # no dependencies
 897 } else {
 898         $git_avatar = '';
 899 }
 900
 901 # dispatch
 902 if (!defined $action) {
 903         if (defined $hash) {
 904                 $action = git_get_type($hash);
 905         } elsif (defined $hash_base && defined $file_name) {
 906                 $action = git_get_type("$hash_base:$file_name");
 907         } elsif (defined $project) {
 908                 $action = 'summary';
 909         } else {
 910                 $action = 'frontpage';
 911         }
 912 }
 913 if (!defined($actions{$action})) {
 914         die_error(400, "Unknown action");
 915 }
 916 if ($action !~ m/^(?:opml|frontpage|project_list|project_index)$/ &&
 917     !$project) {
 918         die_error(400, "Project needed");
 919 }
 920 $actions{$action}->();
 921 exit;
 922
 923 ## ======================================================================
 924 ## action links
 925
 926 sub href {
 927         my %params = @_;
 928         # default is to use -absolute url() i.e. $my_uri
 929         my $href = $params{-full} ? $my_url : $my_uri;
 930
 931         $params{'project'} = $project unless exists $params{'project'};
 932
 933         if ($params{-replay}) {
 934                 while (my ($name, $symbol) = each %cgi_param_mapping) {
 935                         if (!exists $params{$name}) {
 936                                 $params{$name} = $input_params{$name};
 937                         }
 938                 }
 939         }
 940
 941         my $use_pathinfo = gitweb_check_feature('pathinfo');
 942         if ($use_pathinfo and defined $params{'project'}) {
 943                 # try to put as many parameters as possible in PATH_INFO:
 944                 #   - project name
 945                 #   - action
 946                 #   - hash_parent or hash_parent_base:/file_parent
 947                 #   - hash or hash_base:/filename
 948                 #   - the snapshot_format as an appropriate suffix
 949
 950                 # When the script is the root DirectoryIndex for the domain,
 951                 # $href here would be something like http://gitweb.example.com/
 952                 # Thus, we strip any trailing / from $href, to spare us double
 953                 # slashes in the final URL
 954                 $href =~ s,/$,,;
 955
 956                 # Then add the project name, if present
 957                 $href .= "/".esc_url($params{'project'});
 958                 delete $params{'project'};
 959
 960                 # since we destructively absorb parameters, we keep this
 961                 # boolean that remembers if we're handling a snapshot
 962                 my $is_snapshot = $params{'action'} eq 'snapshot';
 963
 964                 # Summary just uses the project path URL, any other action is
 965                 # added to the URL
 966                 if (defined $params{'action'}) {
 967                         $href .= "/".esc_url($params{'action'}) unless $params{'action'} eq 'summary';
 968                         delete $params{'action'};
 969                 }
 970
 971                 # Next, we put hash_parent_base:/file_parent..hash_base:/file_name,
 972                 # stripping nonexistent or useless pieces
 973                 $href .= "/" if ($params{'hash_base'} || $params{'hash_parent_base'}
 974                         || $params{'hash_parent'} || $params{'hash'});
 975                 if (defined $params{'hash_base'}) {
 976                         if (defined $params{'hash_parent_base'}) {
 977                                 $href .= esc_url($params{'hash_parent_base'});
 978                                 # skip the file_parent if it's the same as the file_name
 979                                 if (defined $params{'file_parent'}) {
 980                                         if (defined $params{'file_name'} && $params{'file_parent'} eq $params{'file_name'}) {
 981                                                 delete $params{'file_parent'};
 982                                         } elsif ($params{'file_parent'} !~ /\.\./) {
 983                                                 $href .= ":/".esc_url($params{'file_parent'});
 984                                                 delete $params{'file_parent'};
 985                                         }
 986                                 }
 987                                 $href .= "..";
 988                                 delete $params{'hash_parent'};
 989                                 delete $params{'hash_parent_base'};
 990                         } elsif (defined $params{'hash_parent'}) {
 991                                 $href .= esc_url($params{'hash_parent'}). "..";
 992                                 delete $params{'hash_parent'};
 993                         }
 994
 995                         $href .= esc_url($params{'hash_base'});
 996                         if (defined $params{'file_name'} && $params{'file_name'} !~ /\.\./) {
 997                                 $href .= ":/".esc_url($params{'file_name'});
 998                                 delete $params{'file_name'};
 999                         }
1000                         delete $params{'hash'};
1001                         delete $params{'hash_base'};
1002                 } elsif (defined $params{'hash'}) {
1003                         $href .= esc_url($params{'hash'});
1004                         delete $params{'hash'};
1005                 }
1006
1007                 # If the action was a snapshot, we can absorb the
1008                 # snapshot_format parameter too
1009                 if ($is_snapshot) {
1010                         my $fmt = $params{'snapshot_format'};
1011                         # snapshot_format should always be defined when href()
1012                         # is called, but just in case some code forgets, we
1013                         # fall back to the default
1014                         $fmt ||= $snapshot_fmts[0];
1015                         $href .= $known_snapshot_formats{$fmt}{'suffix'};
1016                         delete $params{'snapshot_format'};
1017                 }
1018         }
1019
1020         # now encode the parameters explicitly
1021         my @result = ();
1022         for (my $i = 0; $i < @cgi_param_mapping; $i += 2) {
1023                 my ($name, $symbol) = ($cgi_param_mapping[$i], $cgi_param_mapping[$i+1]);
1024                 if (defined $params{$name}) {
1025                         if (ref($params{$name}) eq "ARRAY") {
1026                                 foreach my $par (@{$params{$name}}) {
1027                                         push @result, $symbol . "=" . esc_param($par);
1028                                 }
1029                         } else {
1030                                 push @result, $symbol . "=" . esc_param($params{$name});
1031                         }
1032                 }
1033         }
1034         $href .= "?" . join(';', @result) if scalar @result;
1035
1036         return $href;
1037 }
1038
1039
1040 ## ======================================================================
1041 ## validation, quoting/unquoting and escaping
1042
1043 sub validate_action {
1044         my $input = shift || return undef;
1045         return undef unless exists $actions{$input};
1046         return $input;
1047 }
1048
1049 sub validate_project {
1050         my $input = shift || return undef;
1051         if (!validate_pathname($input) ||
1052                 !(-d "$projectroot/$input") ||
1053                 !check_export_ok("$projectroot/$input") ||
1054                 ($strict_export && !project_in_list($input))) {
1055                 return undef;
1056         } else {
1057                 return $input;
1058         }
1059 }
1060
1061 sub validate_pathname {
1062         my $input = shift || return undef;
1063
1064         # no '.' or '..' as elements of path, i.e. no '.' nor '..'
1065         # at the beginning, at the end, and between slashes.
1066         # also this catches doubled slashes
1067         if ($input =~ m!(^|/)(|\.|\.\.)(/|$)!) {
1068                 return undef;
1069         }
1070         # no null characters
1071         if ($input =~ m!\0!) {
1072                 return undef;
1073         }
1074         return $input;
1075 }
1076
1077 sub validate_refname {
1078         my $input = shift || return undef;
1079
1080         # textual hashes are O.K.
1081         if ($input =~ m/^[0-9a-fA-F]{40}$/) {
1082                 return $input;
1083         }
1084         # it must be correct pathname
1085         $input = validate_pathname($input)
1086                 or return undef;
1087         # restrictions on ref name according to git-check-ref-format
1088         if ($input =~ m!(/\.|\.\.|[\000-\040\177 ~^:?*\[]|/$)!) {
1089                 return undef;
1090         }
1091         return $input;
1092 }
1093
1094 # decode sequences of octets in utf8 into Perl's internal form,
1095 # which is utf-8 with utf8 flag set if needed.  gitweb writes out
1096 # in utf-8 thanks to "binmode STDOUT, ':utf8'" at beginning
1097 sub to_utf8 {
1098         my $str = shift;
1099         if (utf8::valid($str)) {
1100                 utf8::decode($str);
1101                 return $str;
1102         } else {
1103                 return decode($fallback_encoding, $str, Encode::FB_DEFAULT);
1104         }
1105 }
1106
1107 # quote unsafe chars, but keep the slash, even when it's not
1108 # correct, but quoted slashes look too horrible in bookmarks
1109 sub esc_param {
1110         my $str = shift;
1111         $str =~ s/([^A-Za-z0-9\-_.~()\/:@ ]+)/CGI::escape($1)/eg;
1112         $str =~ s/ /\+/g;
1113         return $str;
1114 }
1115
1116 # quote unsafe chars in whole URL, so some charactrs cannot be quoted
1117 sub esc_url {
1118         my $str = shift;
1119         $str =~ s/([^A-Za-z0-9\-_.~();\/;?:@&=])/sprintf("%%%02X", ord($1))/eg;
1120         $str =~ s/\+/%2B/g;
1121         $str =~ s/ /\+/g;
1122         return $str;
1123 }
1124
1125 # replace invalid utf8 character with SUBSTITUTION sequence
1126 sub esc_html {
1127         my $str = shift;
1128         my %opts = @_;
1129
1130         $str = to_utf8($str);
1131         $str = $cgi->escapeHTML($str);
1132         if ($opts{'-nbsp'}) {
1133                 $str =~ s/ /&nbsp;/g;
1134         }
1135         $str =~ s|([[:cntrl:]])|(($1 ne "\t") ? quot_cec($1) : $1)|eg;
1136         return $str;
1137 }
1138
1139 # quote control characters and escape filename to HTML
1140 sub esc_path {
1141         my $str = shift;
1142         my %opts = @_;
1143
1144         $str = to_utf8($str);
1145         $str = $cgi->escapeHTML($str);
1146         if ($opts{'-nbsp'}) {
1147                 $str =~ s/ /&nbsp;/g;
1148         }
1149         $str =~ s|([[:cntrl:]])|quot_cec($1)|eg;
1150         return $str;
1151 }
1152
1153 # Make control characters "printable", using character escape codes (CEC)
1154 sub quot_cec {
1155         my $cntrl = shift;
1156         my %opts = @_;
1157         my %es = ( # character escape codes, aka escape sequences
1158                 "\t" => '\t',   # tab            (HT)
1159                 "\n" => '\n',   # line feed      (LF)
1160                 "\r" => '\r',   # carrige return (CR)
1161                 "\f" => '\f',   # form feed      (FF)
1162                 "\b" => '\b',   # backspace      (BS)
1163                 "\a" => '\a',   # alarm (bell)   (BEL)
1164                 "\e" => '\e',   # escape         (ESC)
1165                 "\013" => '\v', # vertical tab   (VT)
1166                 "\000" => '\0', # nul character  (NUL)
1167         );
1168         my $chr = ( (exists $es{$cntrl})
1169                     ? $es{$cntrl}
1170                     : sprintf('\%2x', ord($cntrl)) );
1171         if ($opts{-nohtml}) {
1172                 return $chr;
1173         } else {
1174                 return "<span class=\"cntrl\">$chr</span>";
1175         }
1176 }
1177
1178 # Alternatively use unicode control pictures codepoints,
1179 # Unicode "printable representation" (PR)
1180 sub quot_upr {
1181         my $cntrl = shift;
1182         my %opts = @_;
1183
1184         my $chr = sprintf('&#%04d;', 0x2400+ord($cntrl));
1185         if ($opts{-nohtml}) {
1186                 return $chr;
1187         } else {
1188                 return "<span class=\"cntrl\">$chr</span>";
1189         }
1190 }
1191
1192 # git may return quoted and escaped filenames
1193 sub unquote {
1194         my $str = shift;
1195
1196         sub unq {
1197                 my $seq = shift;
1198                 my %es = ( # character escape codes, aka escape sequences
1199                         't' => "\t",   # tab            (HT, TAB)
1200                         'n' => "\n",   # newline        (NL)
1201                         'r' => "\r",   # return         (CR)
1202                         'f' => "\f",   # form feed      (FF)
1203                         'b' => "\b",   # backspace      (BS)
1204                         'a' => "\a",   # alarm (bell)   (BEL)
1205                         'e' => "\e",   # escape         (ESC)
1206                         'v' => "\013", # vertical tab   (VT)
1207                 );
1208
1209                 if ($seq =~ m/^[0-7]{1,3}$/) {
1210                         # octal char sequence
1211                         return chr(oct($seq));
1212                 } elsif (exists $es{$seq}) {
1213                         # C escape sequence, aka character escape code
1214                         return $es{$seq};
1215                 }
1216                 # quoted ordinary character
1217                 return $seq;
1218         }
1219
1220         if ($str =~ m/^"(.*)"$/) {
1221                 # needs unquoting
1222                 $str = $1;
1223                 $str =~ s/\\([^0-7]|[0-7]{1,3})/unq($1)/eg;
1224         }
1225         return $str;
1226 }
1227
1228 # escape tabs (convert tabs to spaces)
1229 sub untabify {
1230         my $line = shift;
1231
1232         while ((my $pos = index($line, "\t")) != -1) {
1233                 if (my $count = (8 - ($pos % 8))) {
1234                         my $spaces = ' ' x $count;
1235                         $line =~ s/\t/$spaces/;
1236                 }
1237         }
1238
1239         return $line;
1240 }
1241
1242 sub project_in_list {
1243         my $project = shift;
1244         my @list = git_get_projects_list();
1245         return @list && scalar(grep { $_->{'path'} eq $project } @list);
1246 }
1247
1248 ## ----------------------------------------------------------------------
1249 ## HTML aware string manipulation
1250
1251 # Try to chop given string on a word boundary between position
1252 # $len and $len+$add_len. If there is no word boundary there,
1253 # chop at $len+$add_len. Do not chop if chopped part plus ellipsis
1254 # (marking chopped part) would be longer than given string.
1255 sub chop_str {
1256         my $str = shift;
1257         my $len = shift;
1258         my $add_len = shift || 10;
1259         my $where = shift || 'right'; # 'left' | 'center' | 'right'
1260
1261         # Make sure perl knows it is utf8 encoded so we don't
1262         # cut in the middle of a utf8 multibyte char.
1263         $str = to_utf8($str);
1264
1265         # allow only $len chars, but don't cut a word if it would fit in $add_len
1266         # if it doesn't fit, cut it if it's still longer than the dots we would add
1267         # remove chopped character entities entirely
1268
1269         # when chopping in the middle, distribute $len into left and right part
1270         # return early if chopping wouldn't make string shorter
1271         if ($where eq 'center') {
1272                 return $str if ($len + 5 >= length($str)); # filler is length 5
1273                 $len = int($len/2);
1274         } else {
1275                 return $str if ($len + 4 >= length($str)); # filler is length 4
1276         }
1277
1278         # regexps: ending and beginning with word part up to $add_len
1279         my $endre = qr/.{$len}\w{0,$add_len}/;
1280         my $begre = qr/\w{0,$add_len}.{$len}/;
1281
1282         if ($where eq 'left') {
1283                 $str =~ m/^(.*?)($begre)$/;
1284                 my ($lead, $body) = ($1, $2);
1285                 if (length($lead) > 4) {
1286                         $body =~ s/^[^;]*;// if ($lead =~ m/&[^;]*$/);
1287                         $lead = " ...";
1288                 }
1289                 return "$lead$body";
1290
1291         } elsif ($where eq 'center') {
1292                 $str =~ m/^($endre)(.*)$/;
1293                 my ($left, $str)  = ($1, $2);
1294                 $str =~ m/^(.*?)($begre)$/;
1295                 my ($mid, $right) = ($1, $2);
1296                 if (length($mid) > 5) {
1297                         $left  =~ s/&[^;]*$//;
1298                         $right =~ s/^[^;]*;// if ($mid =~ m/&[^;]*$/);
1299                         $mid = " ... ";
1300                 }
1301                 return "$left$mid$right";
1302
1303         } else {
1304                 $str =~ m/^($endre)(.*)$/;
1305                 my $body = $1;
1306                 my $tail = $2;
1307                 if (length($tail) > 4) {
1308                         $body =~ s/&[^;]*$//;
1309                         $tail = "... ";
1310                 }
1311                 return "$body$tail";
1312         }
1313 }
1314
1315 # takes the same arguments as chop_str, but also wraps a <span> around the
1316 # result with a title attribute if it does get chopped. Additionally, the
1317 # string is HTML-escaped.
1318 sub chop_and_escape_str {
1319         my ($str) = @_;
1320
1321         my $chopped = chop_str(@_);
1322         if ($chopped eq $str) {
1323                 return esc_html($chopped);
1324         } else {
1325                 $str =~ s/[[:cntrl:]]/?/g;
1326                 return $cgi->span({-title=>$str}, esc_html($chopped));
1327         }
1328 }
1329
1330 ## ----------------------------------------------------------------------
1331 ## functions returning short strings
1332
1333 # CSS class for given age value (in seconds)
1334 sub age_class {
1335         my $age = shift;
1336
1337         if (!defined $age) {
1338                 return "noage";
1339         } elsif ($age < 60*60*2) {
1340                 return "age0";
1341         } elsif ($age < 60*60*24*2) {
1342                 return "age1";
1343         } else {
1344                 return "age2";
1345         }
1346 }
1347
1348 # convert age in seconds to "nn units ago" string
1349 sub age_string {
1350         my $age = shift;
1351         my $age_str;
1352
1353         if ($age > 60*60*24*365*2) {
1354                 $age_str = (int $age/60/60/24/365);
1355                 $age_str .= " years ago";
1356         } elsif ($age > 60*60*24*(365/12)*2) {
1357                 $age_str = int $age/60/60/24/(365/12);
1358                 $age_str .= " months ago";
1359         } elsif ($age > 60*60*24*7*2) {
1360                 $age_str = int $age/60/60/24/7;
1361                 $age_str .= " weeks ago";
1362         } elsif ($age > 60*60*24*2) {
1363                 $age_str = int $age/60/60/24;
1364                 $age_str .= " days ago";
1365         } elsif ($age > 60*60*2) {
1366                 $age_str = int $age/60/60;
1367                 $age_str .= " hours ago";
1368         } elsif ($age > 60*2) {
1369                 $age_str = int $age/60;
1370                 $age_str .= " min ago";
1371         } elsif ($age > 2) {
1372                 $age_str = int $age;
1373                 $age_str .= " sec ago";
1374         } else {
1375                 $age_str .= " right now";
1376         }
1377         return $age_str;
1378 }
1379
1380 use constant {
1381         S_IFINVALID => 0030000,
1382         S_IFGITLINK => 0160000,
1383 };
1384
1385 # submodule/subproject, a commit object reference
1386 sub S_ISGITLINK {
1387         my $mode = shift;
1388
1389         return (($mode & S_IFMT) == S_IFGITLINK)
1390 }
1391
1392 # convert file mode in octal to symbolic file mode string
1393 sub mode_str {
1394         my $mode = oct shift;
1395
1396         if (S_ISGITLINK($mode)) {
1397                 return 'm---------';
1398         } elsif (S_ISDIR($mode & S_IFMT)) {
1399                 return 'drwxr-xr-x';
1400         } elsif (S_ISLNK($mode)) {
1401                 return 'lrwxrwxrwx';
1402         } elsif (S_ISREG($mode)) {
1403                 # git cares only about the executable bit
1404                 if ($mode & S_IXUSR) {
1405                         return '-rwxr-xr-x';
1406                 } else {
1407                         return '-rw-r--r--';
1408                 };
1409         } else {
1410                 return '----------';
1411         }
1412 }
1413
1414 # convert file mode in octal to file type string
1415 sub file_type {
1416         my $mode = shift;
1417
1418         if ($mode !~ m/^[0-7]+$/) {
1419                 return $mode;
1420         } else {
1421                 $mode = oct $mode;
1422         }
1423
1424         if (S_ISGITLINK($mode)) {
1425                 return "submodule";
1426         } elsif (S_ISDIR($mode & S_IFMT)) {
1427                 return "directory";
1428         } elsif (S_ISLNK($mode)) {
1429                 return "symlink";
1430         } elsif (S_ISREG($mode)) {
1431                 return "file";
1432         } else {
1433                 return "unknown";
1434         }
1435 }
1436
1437 # convert file mode in octal to file type description string
1438 sub file_type_long {
1439         my $mode = shift;
1440
1441         if ($mode !~ m/^[0-7]+$/) {
1442                 return $mode;
1443         } else {
1444                 $mode = oct $mode;
1445         }
1446
1447         if (S_ISGITLINK($mode)) {
1448                 return "submodule";
1449         } elsif (S_ISDIR($mode & S_IFMT)) {
1450                 return "directory";
1451         } elsif (S_ISLNK($mode)) {
1452                 return "symlink";
1453         } elsif (S_ISREG($mode)) {
1454                 if ($mode & S_IXUSR) {
1455                         return "executable";
1456                 } else {
1457                         return "file";
1458                 };
1459         } else {
1460                 return "unknown";
1461         }
1462 }
1463
1464
1465 ## ----------------------------------------------------------------------
1466 ## functions returning short HTML fragments, or transforming HTML fragments
1467 ## which don't belong to other sections
1468
1469 # format line of commit message.
1470 sub format_log_line_html {
1471         my $line = shift;
1472
1473         $line = esc_html($line, -nbsp=>1);
1474         $line =~ s{\b([0-9a-fA-F]{8,40})\b}{
1475                 $cgi->a({-href => href(action=>"object", hash=>$1),
1476                                         -class => "text"}, $1);
1477         }eg;
1478
1479         return $line;
1480 }
1481
1482 # format marker of refs pointing to given object
1483
1484 # the destination action is chosen based on object type and current context:
1485 # - for annotated tags, we choose the tag view unless it's the current view
1486 #   already, in which case we go to shortlog view
1487 # - for other refs, we keep the current view if we're in history, shortlog or
1488 #   log view, and select shortlog otherwise
1489 sub format_ref_marker {
1490         my ($refs, $id) = @_;
1491         my $markers = '';
1492
1493         if (defined $refs->{$id}) {
1494                 foreach my $ref (@{$refs->{$id}}) {
1495                         # this code exploits the fact that non-lightweight tags are the
1496                         # only indirect objects, and that they are the only objects for which
1497                         # we want to use tag instead of shortlog as action
1498                         my ($type, $name) = qw();
1499                         my $indirect = ($ref =~ s/\^\{\}$//);
1500                         # e.g. tags/v2.6.11 or heads/next
1501                         if ($ref =~ m!^(.*?)s?/(.*)$!) {
1502                                 $type = $1;
1503                                 $name = $2;
1504                         } else {
1505                                 $type = "ref";
1506                                 $name = $ref;
1507                         }
1508
1509                         my $class = $type;
1510                         $class .= " indirect" if $indirect;
1511
1512                         my $dest_action = "shortlog";
1513
1514                         if ($indirect) {
1515                                 $dest_action = "tag" unless $action eq "tag";
1516                         } elsif ($action =~ /^(history|(short)?log)$/) {
1517                                 $dest_action = $action;
1518                         }
1519
1520                         my $dest = "";
1521                         $dest .= "refs/" unless $ref =~ m!^refs/!;
1522                         $dest .= $ref;
1523
1524                         my $link = $cgi->a({
1525                                 -href => href(
1526                                         action=>$dest_action,
1527                                         hash=>$dest
1528                                 )}, $name);
1529
1530                         $markers .= " <span class=\"$class\" title=\"$ref\">" .
1531                                 $link . "</span>";
1532                 }
1533         }
1534
1535         if ($markers) {
1536                 return ' <span class="refs">'. $markers . '</span>';
1537         } else {
1538                 return "";
1539         }
1540 }
1541
1542 # format, perhaps shortened and with markers, title line
1543 sub format_subject_html {
1544         my ($long, $short, $href, $extra) = @_;
1545         $extra = '' unless defined($extra);
1546
1547         if (length($short) < length($long)) {
1548                 $long =~ s/[[:cntrl:]]/?/g;
1549                 return $cgi->a({-href => $href, -class => "list subject",
1550                                 -title => to_utf8($long)},
1551                        esc_html($short)) . $extra;
1552         } else {
1553                 return $cgi->a({-href => $href, -class => "list subject"},
1554                        esc_html($long)) . $extra;
1555         }
1556 }
1557
1558 # Rather than recomputing the url for an email multiple times, we cache it
1559 # after the first hit. This gives a visible benefit in views where the avatar
1560 # for the same email is used repeatedly (e.g. shortlog).
1561 # The cache is shared by all avatar engines (currently gravatar only), which
1562 # are free to use it as preferred. Since only one avatar engine is used for any
1563 # given page, there's no risk for cache conflicts.
1564 our %avatar_cache = ();
1565
1566 # Compute the picon url for a given email, by using the picon search service over at
1567 # http://www.cs.indiana.edu/picons/search.html
1568 sub picon_url {
1569         my $email = lc shift;
1570         if (!$avatar_cache{$email}) {
1571                 my ($user, $domain) = split('@', $email);
1572                 $avatar_cache{$email} =
1573                         "http://www.cs.indiana.edu/cgi-pub/kinzler/piconsearch.cgi/" .
1574                         "$domain/$user/" .
1575                         "users+domains+unknown/up/single";
1576         }
1577         return $avatar_cache{$email};
1578 }
1579
1580 # Compute the gravatar url for a given email, if it's not in the cache already.
1581 # Gravatar stores only the part of the URL before the size, since that's the
1582 # one computationally more expensive. This also allows reuse of the cache for
1583 # different sizes (for this particular engine).
1584 sub gravatar_url {
1585         my $email = lc shift;
1586         my $size = shift;
1587         $avatar_cache{$email} ||=
1588                 "http://www.gravatar.com/avatar/" .
1589                         Digest::MD5::md5_hex($email) . "?s=";
1590         return $avatar_cache{$email} . $size;
1591 }
1592
1593 # Insert an avatar for the given $email at the given $size if the feature
1594 # is enabled.
1595 sub git_get_avatar {
1596         my ($email, %opts) = @_;
1597         my $pre_white  = ($opts{-pad_before} ? "&nbsp;" : "");
1598         my $post_white = ($opts{-pad_after}  ? "&nbsp;" : "");
1599         $opts{-size} ||= 'default';
1600         my $size = $avatar_size{$opts{-size}} || $avatar_size{'default'};
1601         my $url = "";
1602         if ($git_avatar eq 'gravatar') {
1603                 $url = gravatar_url($email, $size);
1604         } elsif ($git_avatar eq 'picon') {
1605                 $url = picon_url($email);
1606         }
1607         # Other providers can be added by extending the if chain, defining $url
1608         # as needed. If no variant puts something in $url, we assume avatars
1609         # are completely disabled/unavailable.
1610         if ($url) {
1611                 return $pre_white .
1612                        "<img width=\"$size\" " .
1613                             "class=\"avatar\" " .
1614                             "src=\"$url\" " .
1615                             "alt=\"\" " .
1616                        "/>" . $post_white;
1617         } else {
1618                 return "";
1619         }
1620 }
1621
1622 sub format_search_author {
1623         my ($author, $searchtype, $displaytext) = @_;
1624         my $have_search = gitweb_check_feature('search');
1625
1626         if ($have_search) {
1627                 my $performed = "";
1628                 if ($searchtype eq 'author') {
1629                         $performed = "authored";
1630                 } elsif ($searchtype eq 'committer') {
1631                         $performed = "committed";
1632                 }
1633
1634                 return $cgi->a({-href => href(action=>"search", hash=>$hash,
1635                                 searchtext=>$author,
1636                                 searchtype=>$searchtype), class=>"list",
1637                                 title=>"Search for commits $performed by $author"},
1638                                 $displaytext);
1639
1640         } else {
1641                 return $displaytext;
1642         }
1643 }
1644
1645 # format the author name of the given commit with the given tag
1646 # the author name is chopped and escaped according to the other
1647 # optional parameters (see chop_str).
1648 sub format_author_html {
1649         my $tag = shift;
1650         my $co = shift;
1651         my $author = chop_and_escape_str($co->{'author_name'}, @_);
1652         return "<$tag class=\"author\">" .
1653                format_search_author($co->{'author_name'}, "author",
1654                        git_get_avatar($co->{'author_email'}, -pad_after => 1) .
1655                        $author) .
1656                "</$tag>";
1657 }
1658
1659 # format git diff header line, i.e. "diff --(git|combined|cc) ..."
1660 sub format_git_diff_header_line {
1661         my $line = shift;
1662         my $diffinfo = shift;
1663         my ($from, $to) = @_;
1664
1665         if ($diffinfo->{'nparents'}) {
1666                 # combined diff
1667                 $line =~ s!^(diff (.*?) )"?.*$!$1!;
1668                 if ($to->{'href'}) {
1669                         $line .= $cgi->a({-href => $to->{'href'}, -class => "path"},
1670                                          esc_path($to->{'file'}));
1671                 } else { # file was deleted (no href)
1672                         $line .= esc_path($to->{'file'});
1673                 }
1674         } else {
1675                 # "ordinary" diff
1676                 $line =~ s!^(diff (.*?) )"?a/.*$!$1!;
1677                 if ($from->{'href'}) {
1678                         $line .= $cgi->a({-href => $from->{'href'}, -class => "path"},
1679                                          'a/' . esc_path($from->{'file'}));
1680                 } else { # file was added (no href)
1681                         $line .= 'a/' . esc_path($from->{'file'});
1682                 }
1683                 $line .= ' ';
1684                 if ($to->{'href'}) {
1685                         $line .= $cgi->a({-href => $to->{'href'}, -class => "path"},
1686                                          'b/' . esc_path($to->{'file'}));
1687                 } else { # file was deleted
1688                         $line .= 'b/' . esc_path($to->{'file'});
1689                 }
1690         }
1691
1692         return "<div class=\"diff header\">$line</div>\n";
1693 }
1694
1695 # format extended diff header line, before patch itself
1696 sub format_extended_diff_header_line {
1697         my $line = shift;
1698         my $diffinfo = shift;
1699         my ($from, $to) = @_;
1700
1701         # match <path>
1702         if ($line =~ s!^((copy|rename) from ).*$!$1! && $from->{'href'}) {
1703                 $line .= $cgi->a({-href=>$from->{'href'}, -class=>"path"},
1704                                        esc_path($from->{'file'}));
1705         }
1706         if ($line =~ s!^((copy|rename) to ).*$!$1! && $to->{'href'}) {
1707                 $line .= $cgi->a({-href=>$to->{'href'}, -class=>"path"},
1708                                  esc_path($to->{'file'}));
1709         }
1710         # match single <mode>
1711         if ($line =~ m/\s(\d{6})$/) {
1712                 $line .= '<span class="info"> (' .
1713                          file_type_long($1) .
1714                          ')</span>';
1715         }
1716         # match <hash>
1717         if ($line =~ m/^index [0-9a-fA-F]{40},[0-9a-fA-F]{40}/) {
1718                 # can match only for combined diff
1719                 $line = 'index ';
1720                 for (my $i = 0; $i < $diffinfo->{'nparents'}; $i++) {
1721                         if ($from->{'href'}[$i]) {
1722                                 $line .= $cgi->a({-href=>$from->{'href'}[$i],
1723                                                   -class=>"hash"},
1724                                                  substr($diffinfo->{'from_id'}[$i],0,7));
1725                         } else {
1726                                 $line .= '0' x 7;
1727                         }
1728                         # separator
1729                         $line .= ',' if ($i < $diffinfo->{'nparents'} - 1);
1730                 }
1731                 $line .= '..';
1732                 if ($to->{'href'}) {
1733                         $line .= $cgi->a({-href=>$to->{'href'}, -class=>"hash"},
1734                                          substr($diffinfo->{'to_id'},0,7));
1735                 } else {
1736                         $line .= '0' x 7;
1737                 }
1738
1739         } elsif ($line =~ m/^index [0-9a-fA-F]{40}..[0-9a-fA-F]{40}/) {
1740                 # can match only for ordinary diff
1741                 my ($from_link, $to_link);
1742                 if ($from->{'href'}) {
1743                         $from_link = $cgi->a({-href=>$from->{'href'}, -class=>"hash"},
1744                                              substr($diffinfo->{'from_id'},0,7));
1745                 } else {
1746                         $from_link = '0' x 7;
1747                 }
1748                 if ($to->{'href'}) {
1749                         $to_link = $cgi->a({-href=>$to->{'href'}, -class=>"hash"},
1750                                            substr($diffinfo->{'to_id'},0,7));
1751                 } else {
1752                         $to_link = '0' x 7;
1753                 }
1754                 my ($from_id, $to_id) = ($diffinfo->{'from_id'}, $diffinfo->{'to_id'});
1755                 $line =~ s!$from_id\.\.$to_id!$from_link..$to_link!;
1756         }
1757
1758         return $line . "<br/>\n";
1759 }
1760
1761 # format from-file/to-file diff header
1762 sub format_diff_from_to_header {
1763         my ($from_line, $to_line, $diffinfo, $from, $to, @parents) = @_;
1764         my $line;
1765         my $result = '';
1766
1767         $line = $from_line;
1768         #assert($line =~ m/^---/) if DEBUG;
1769         # no extra formatting for "^--- /dev/null"
1770         if (! $diffinfo->{'nparents'}) {
1771                 # ordinary (single parent) diff
1772                 if ($line =~ m!^--- "?a/!) {
1773                         if ($from->{'href'}) {
1774                                 $line = '--- a/' .
1775                                         $cgi->a({-href=>$from->{'href'}, -class=>"path"},
1776                                                 esc_path($from->{'file'}));
1777                         } else {
1778                                 $line = '--- a/' .
1779                                         esc_path($from->{'file'});
1780                         }
1781                 }
1782                 $result .= qq!<div class="diff from_file">$line</div>\n!;
1783
1784         } else {
1785                 # combined diff (merge commit)
1786                 for (my $i = 0; $i < $diffinfo->{'nparents'}; $i++) {
1787                         if ($from->{'href'}[$i]) {
1788                                 $line = '--- ' .
1789                                         $cgi->a({-href=>href(action=>"blobdiff",
1790                                                              hash_parent=>$diffinfo->{'from_id'}[$i],
1791                                                              hash_parent_base=>$parents[$i],
1792                                                              file_parent=>$from->{'file'}[$i],
1793                                                              hash=>$diffinfo->{'to_id'},
1794                                                              hash_base=>$hash,
1795                                                              file_name=>$to->{'file'}),
1796                                                  -class=>"path",
1797                                                  -title=>"diff" . ($i+1)},
1798                                                 $i+1) .
1799                                         '/' .
1800                                         $cgi->a({-href=>$from->{'href'}[$i], -class=>"path"},
1801                                                 esc_path($from->{'file'}[$i]));
1802                         } else {
1803                                 $line = '--- /dev/null';
1804                         }
1805                         $result .= qq!<div class="diff from_file">$line</div>\n!;
1806                 }
1807         }
1808
1809         $line = $to_line;
1810         #assert($line =~ m/^\+\+\+/) if DEBUG;
1811         # no extra formatting for "^+++ /dev/null"
1812         if ($line =~ m!^\+\+\+ "?b/!) {
1813                 if ($to->{'href'}) {
1814                         $line = '+++ b/' .
1815                                 $cgi->a({-href=>$to->{'href'}, -class=>"path"},
1816                                         esc_path($to->{'file'}));
1817                 } else {
1818                         $line = '+++ b/' .
1819                                 esc_path($to->{'file'});
1820                 }
1821         }
1822         $result .= qq!<div class="diff to_file">$line</div>\n!;
1823
1824         return $result;
1825 }
1826
1827 # create note for patch simplified by combined diff
1828 sub format_diff_cc_simplified {
1829         my ($diffinfo, @parents) = @_;
1830         my $result = '';
1831
1832         $result .= "<div class=\"diff header\">" .
1833                    "diff --cc ";
1834         if (!is_deleted($diffinfo)) {
1835                 $result .= $cgi->a({-href => href(action=>"blob",
1836                                                   hash_base=>$hash,
1837                                                   hash=>$diffinfo->{'to_id'},
1838                                                   file_name=>$diffinfo->{'to_file'}),
1839                                     -class => "path"},
1840                                    esc_path($diffinfo->{'to_file'}));
1841         } else {
1842                 $result .= esc_path($diffinfo->{'to_file'});
1843         }
1844         $result .= "</div>\n" . # class="diff header"
1845                    "<div class=\"diff nodifferences\">" .
1846                    "Simple merge" .
1847                    "</div>\n"; # class="diff nodifferences"
1848
1849         return $result;
1850 }
1851
1852 # format patch (diff) line (not to be used for diff headers)
1853 sub format_diff_line {
1854         my $line = shift;
1855         my ($from, $to) = @_;
1856         my $diff_class = "";
1857
1858         chomp $line;
1859
1860         if ($from && $to && ref($from->{'href'}) eq "ARRAY") {
1861                 # combined diff
1862                 my $prefix = substr($line, 0, scalar @{$from->{'href'}});
1863                 if ($line =~ m/^\@{3}/) {
1864                         $diff_class = " chunk_header";
1865                 } elsif ($line =~ m/^\\/) {
1866                         $diff_class = " incomplete";
1867                 } elsif ($prefix =~ tr/+/+/) {
1868                         $diff_class = " add";
1869                 } elsif ($prefix =~ tr/-/-/) {
1870                         $diff_class = " rem";
1871                 }
1872         } else {
1873                 # assume ordinary diff
1874                 my $char = substr($line, 0, 1);
1875                 if ($char eq '+') {
1876                         $diff_class = " add";
1877                 } elsif ($char eq '-') {
1878                         $diff_class = " rem";
1879                 } elsif ($char eq '@') {
1880                         $diff_class = " chunk_header";
1881                 } elsif ($char eq "\\") {
1882                         $diff_class = " incomplete";
1883                 }
1884         }
1885         $line = untabify($line);
1886         if ($from && $to && $line =~ m/^\@{2} /) {
1887                 my ($from_text, $from_start, $from_lines, $to_text, $to_start, $to_lines, $section) =
1888                         $line =~ m/^\@{2} (-(\d+)(?:,(\d+))?) (\+(\d+)(?:,(\d+))?) \@{2}(.*)$/;
1889
1890                 $from_lines = 0 unless defined $from_lines;
1891                 $to_lines   = 0 unless defined $to_lines;
1892
1893                 if ($from->{'href'}) {
1894                         $from_text = $cgi->a({-href=>"$from->{'href'}#l$from_start",
1895                                              -class=>"list"}, $from_text);
1896                 }
1897                 if ($to->{'href'}) {
1898                         $to_text   = $cgi->a({-href=>"$to->{'href'}#l$to_start",
1899                                              -class=>"list"}, $to_text);
1900                 }
1901                 $line = "<span class=\"chunk_info\">@@ $from_text $to_text @@</span>" .
1902                         "<span class=\"section\">" . esc_html($section, -nbsp=>1) . "</span>";
1903                 return "<div class=\"diff$diff_class\">$line</div>\n";
1904         } elsif ($from && $to && $line =~ m/^\@{3}/) {
1905                 my ($prefix, $ranges, $section) = $line =~ m/^(\@+) (.*?) \@+(.*)$/;
1906                 my (@from_text, @from_start, @from_nlines, $to_text, $to_start, $to_nlines);
1907
1908                 @from_text = split(' ', $ranges);
1909                 for (my $i = 0; $i < @from_text; ++$i) {
1910                         ($from_start[$i], $from_nlines[$i]) =
1911                                 (split(',', substr($from_text[$i], 1)), 0);
1912                 }
1913
1914                 $to_text   = pop @from_text;
1915                 $to_start  = pop @from_start;
1916                 $to_nlines = pop @from_nlines;
1917
1918                 $line = "<span class=\"chunk_info\">$prefix ";
1919                 for (my $i = 0; $i < @from_text; ++$i) {
1920                         if ($from->{'href'}[$i]) {
1921                                 $line .= $cgi->a({-href=>"$from->{'href'}[$i]#l$from_start[$i]",
1922                                                   -class=>"list"}, $from_text[$i]);
1923                         } else {
1924                                 $line .= $from_text[$i];
1925                         }
1926                         $line .= " ";
1927                 }
1928                 if ($to->{'href'}) {
1929                         $line .= $cgi->a({-href=>"$to->{'href'}#l$to_start",
1930                                           -class=>"list"}, $to_text);
1931                 } else {
1932                         $line .= $to_text;
1933                 }
1934                 $line .= " $prefix</span>" .
1935                          "<span class=\"section\">" . esc_html($section, -nbsp=>1) . "</span>";
1936                 return "<div class=\"diff$diff_class\">$line</div>\n";
1937         }
1938         return "<div class=\"diff$diff_class\">" . esc_html($line, -nbsp=>1) . "</div>\n";
1939 }
1940
1941 # Generates undef or something like "_snapshot_" or "snapshot (_tbz2_ _zip_)",
1942 # linked.  Pass the hash of the tree/commit to snapshot.
1943 sub format_snapshot_links {
1944         my ($hash) = @_;
1945         my $num_fmts = @snapshot_fmts;
1946         if ($num_fmts > 1) {
1947                 # A parenthesized list of links bearing format names.
1948                 # e.g. "snapshot (_tar.gz_ _zip_)"
1949                 return "snapshot (" . join(' ', map
1950                         $cgi->a({
1951                                 -href => href(
1952                                         action=>"snapshot",
1953                                         hash=>$hash,
1954                                         snapshot_format=>$_
1955                                 )
1956                         }, $known_snapshot_formats{$_}{'display'})
1957                 , @snapshot_fmts) . ")";
1958         } elsif ($num_fmts == 1) {
1959                 # A single "snapshot" link whose tooltip bears the format name.
1960                 # i.e. "_snapshot_"
1961                 my ($fmt) = @snapshot_fmts;
1962                 return
1963                         $cgi->a({
1964                                 -href => href(
1965                                         action=>"snapshot",
1966                                         hash=>$hash,
1967                                         snapshot_format=>$fmt
1968                                 ),
1969                                 -title => "in format: $known_snapshot_formats{$fmt}{'display'}"
1970                         }, "snapshot");
1971         } else { # $num_fmts == 0
1972                 return undef;
1973         }
1974 }
1975
1976 ## ......................................................................
1977 ## functions returning values to be passed, perhaps after some
1978 ## transformation, to other functions; e.g. returning arguments to href()
1979
1980 # returns hash to be passed to href to generate gitweb URL
1981 # in -title key it returns description of link
1982 sub get_feed_info {
1983         my $format = shift || 'Atom';
1984         my %res = (action => lc($format));
1985
1986         # feed links are possible only for project views
1987         return unless (defined $project);
1988         # some views should link to OPML, or to generic project feed,
1989         # or don't have specific feed yet (so they should use generic)
1990         return if ($action =~ /^(?:tags|heads|forks|tag|search)$/x);
1991
1992         my $branch;
1993         # branches refs uses 'refs/heads/' prefix (fullname) to differentiate
1994         # from tag links; this also makes possible to detect branch links
1995         if ((defined $hash_base && $hash_base =~ m!^refs/heads/(.*)$!) ||
1996             (defined $hash      && $hash      =~ m!^refs/heads/(.*)$!)) {
1997                 $branch = $1;
1998         }
1999         # find log type for feed description (title)
2000         my $type = 'log';
2001         if (defined $file_name) {
2002                 $type  = "history of $file_name";
2003                 $type .= "/" if ($action eq 'tree');
2004                 $type .= " on '$branch'" if (defined $branch);
2005         } else {
2006                 $type = "log of $branch" if (defined $branch);
2007         }
2008
2009         $res{-title} = $type;
2010         $res{'hash'} = (defined $branch ? "refs/heads/$branch" : undef);
2011         $res{'file_name'} = $file_name;
2012
2013         return %res;
2014 }
2015
2016 ## ----------------------------------------------------------------------
2017 ## git utility subroutines, invoking git commands
2018
2019 # returns path to the core git executable and the --git-dir parameter as list
2020 sub git_cmd {
2021         return $GIT, '--git-dir='.$git_dir;
2022 }
2023
2024 # quote the given arguments for passing them to the shell
2025 # quote_command("command", "arg 1", "arg with ' and ! characters")
2026 # => "'command' 'arg 1' 'arg with '\'' and '\!' characters'"
2027 # Try to avoid using this function wherever possible.
2028 sub quote_command {
2029         return join(' ',
2030                 map { my $a = $_; $a =~ s/(['!])/'\\$1'/g; "'$a'" } @_ );
2031 }
2032
2033 # get HEAD ref of given project as hash
2034 sub git_get_head_hash {
2035         my $project = shift;
2036         my $o_git_dir = $git_dir;
2037         my $retval = undef;
2038         $git_dir = "$projectroot/$project";
2039         if (open my $fd, "-|", git_cmd(), "rev-parse", "--verify", "HEAD") {
2040                 my $head = <$fd>;
2041                 close $fd;
2042                 if (defined $head && $head =~ /^([0-9a-fA-F]{40})$/) {
2043                         $retval = $1;
2044                 }
2045         }
2046         if (defined $o_git_dir) {
2047                 $git_dir = $o_git_dir;
2048         }
2049         return $retval;
2050 }
2051
2052 # get type of given object
2053 sub git_get_type {
2054         my $hash = shift;
2055
2056         open my $fd, "-|", git_cmd(), "cat-file", '-t', $hash or return;
2057         my $type = <$fd>;
2058         close $fd or return;
2059         chomp $type;
2060         return $type;
2061 }
2062
2063 # repository configuration
2064 our $config_file = '';
2065 our %config;
2066
2067 # store multiple values for single key as anonymous array reference
2068 # single values stored directly in the hash, not as [ <value> ]
2069 sub hash_set_multi {
2070         my ($hash, $key, $value) = @_;
2071
2072         if (!exists $hash->{$key}) {
2073                 $hash->{$key} = $value;
2074         } elsif (!ref $hash->{$key}) {
2075                 $hash->{$key} = [ $hash->{$key}, $value ];
2076         } else {
2077                 push @{$hash->{$key}}, $value;
2078         }
2079 }
2080
2081 # return hash of git project configuration
2082 # optionally limited to some section, e.g. 'gitweb'
2083 sub git_parse_project_config {
2084         my $section_regexp = shift;
2085         my %config;
2086
2087         local $/ = "\0";
2088
2089         open my $fh, "-|", git_cmd(), "config", '-z', '-l',
2090                 or return;
2091
2092         while (my $keyval = <$fh>) {
2093                 chomp $keyval;
2094                 my ($key, $value) = split(/\n/, $keyval, 2);
2095
2096                 hash_set_multi(\%config, $key, $value)
2097                         if (!defined $section_regexp || $key =~ /^(?:$section_regexp)\./o);
2098         }
2099         close $fh;
2100
2101         return %config;
2102 }
2103
2104 # convert config value to boolean: 'true' or 'false'
2105 # no value, number > 0, 'true' and 'yes' values are true
2106 # rest of values are treated as false (never as error)
2107 sub config_to_bool {
2108         my $val = shift;
2109
2110         return 1 if !defined $val;             # section.key
2111
2112         # strip leading and trailing whitespace
2113         $val =~ s/^\s+//;
2114         $val =~ s/\s+$//;
2115
2116         return (($val =~ /^\d+$/ && $val) ||   # section.key = 1
2117                 ($val =~ /^(?:true|yes)$/i));  # section.key = true
2118 }
2119
2120 # convert config value to simple decimal number
2121 # an optional value suffix of 'k', 'm', or 'g' will cause the value
2122 # to be multiplied by 1024, 1048576, or 1073741824
2123 sub config_to_int {
2124         my $val = shift;
2125
2126         # strip leading and trailing whitespace
2127         $val =~ s/^\s+//;
2128         $val =~ s/\s+$//;
2129
2130         if (my ($num, $unit) = ($val =~ /^([0-9]*)([kmg])$/i)) {
2131                 $unit = lc($unit);
2132                 # unknown unit is treated as 1
2133                 return $num * ($unit eq 'g' ? 1073741824 :
2134                                $unit eq 'm' ?    1048576 :
2135                                $unit eq 'k' ?       1024 : 1);
2136         }
2137         return $val;
2138 }
2139
2140 # convert config value to array reference, if needed
2141 sub config_to_multi {
2142         my $val = shift;
2143
2144         return ref($val) ? $val : (defined($val) ? [ $val ] : []);
2145 }
2146
2147 sub git_get_project_config {
2148         my ($key, $type) = @_;
2149
2150         # key sanity check
2151         return unless ($key);
2152         $key =~ s/^gitweb\.//;
2153         return if ($key =~ m/\W/);
2154
2155         # type sanity check
2156         if (defined $type) {
2157                 $type =~ s/^--//;
2158                 $type = undef
2159                         unless ($type eq 'bool' || $type eq 'int');
2160         }
2161
2162         # get config
2163         if (!defined $config_file ||
2164             $config_file ne "$git_dir/config") {
2165                 %config = git_parse_project_config('gitweb');
2166                 $config_file = "$git_dir/config";
2167         }
2168
2169         # check if config variable (key) exists
2170         return unless exists $config{"gitweb.$key"};
2171
2172         # ensure given type
2173         if (!defined $type) {
2174                 return $config{"gitweb.$key"};
2175         } elsif ($type eq 'bool') {
2176                 # backward compatibility: 'git config --bool' returns true/false
2177                 return config_to_bool($config{"gitweb.$key"}) ? 'true' : 'false';
2178         } elsif ($type eq 'int') {
2179                 return config_to_int($config{"gitweb.$key"});
2180         }
2181         return $config{"gitweb.$key"};
2182 }
2183
2184 # get hash of given path at given ref
2185 sub git_get_hash_by_path {
2186         my $base = shift;
2187         my $path = shift || return undef;
2188         my $type = shift;
2189
2190         $path =~ s,/+$,,;
2191
2192         open my $fd, "-|", git_cmd(), "ls-tree", $base, "--", $path
2193                 or die_error(500, "Open git-ls-tree failed");
2194         my $line = <$fd>;
2195         close $fd or return undef;
2196
2197         if (!defined $line) {
2198                 # there is no tree or hash given by $path at $base
2199                 return undef;
2200         }
2201
2202         #'100644 blob 0fa3f3a66fb6a137f6ec2c19351ed4d807070ffa  panic.c'
2203         $line =~ m/^([0-9]+) (.+) ([0-9a-fA-F]{40})\t/;
2204         if (defined $type && $type ne $2) {
2205                 # type doesn't match
2206                 return undef;
2207         }
2208         return $3;
2209 }
2210
2211 # get path of entry with given hash at given tree-ish (ref)
2212 # used to get 'from' filename for combined diff (merge commit) for renames
2213 sub git_get_path_by_hash {
2214         my $base = shift || return;
2215         my $hash = shift || return;
2216
2217         local $/ = "\0";
2218
2219         open my $fd, "-|", git_cmd(), "ls-tree", '-r', '-t', '-z', $base
2220                 or return undef;
2221         while (my $line = <$fd>) {
2222                 chomp $line;
2223
2224                 #'040000 tree 595596a6a9117ddba9fe379b6b012b558bac8423  gitweb'
2225                 #'100644 blob e02e90f0429be0d2a69b76571101f20b8f75530f  gitweb/README'
2226                 if ($line =~ m/(?:[0-9]+) (?:.+) $hash\t(.+)$/) {
2227                         close $fd;
2228                         return $1;
2229                 }
2230         }
2231         close $fd;
2232         return undef;
2233 }
2234
2235 ## ......................................................................
2236 ## git utility functions, directly accessing git repository
2237
2238 sub git_get_project_description {
2239         my $path = shift;
2240
2241         $git_dir = "$projectroot/$path";
2242         open my $fd, '<', "$git_dir/description"
2243                 or return git_get_project_config('description');
2244         my $descr = <$fd>;
2245         close $fd;
2246         if (defined $descr) {
2247                 chomp $descr;
2248         }
2249         return $descr;
2250 }
2251
2252 sub git_get_project_ctags {
2253         my $path = shift;
2254         my $ctags = {};
2255
2256         $git_dir = "$projectroot/$path";
2257         opendir my $dh, "$git_dir/ctags"
2258                 or return $ctags;
2259         foreach (grep { -f $_ } map { "$git_dir/ctags/$_" } readdir($dh)) {
2260                 open my $ct, '<', $_ or next;
2261                 my $val = <$ct>;
2262                 chomp $val;
2263                 close $ct;
2264                 my $ctag = $_; $ctag =~ s#.*/##;
2265                 $ctags->{$ctag} = $val;
2266         }
2267         closedir $dh;
2268         $ctags;
2269 }
2270
2271 sub git_populate_project_tagcloud {
2272         my ($ctags, $action) = @_;
2273
2274         # First, merge different-cased tags; tags vote on casing
2275         my %ctags_lc;
2276         foreach (keys %$ctags) {
2277                 $ctags_lc{lc $_}->{count} += $ctags->{$_};
2278                 if (not $ctags_lc{lc $_}->{topcount}
2279                     or $ctags_lc{lc $_}->{topcount} < $ctags->{$_}) {
2280                         $ctags_lc{lc $_}->{topcount} = $ctags->{$_};
2281                         $ctags_lc{lc $_}->{topname} = $_;
2282                 }
2283         }
2284
2285         my $cloud;
2286         if (eval { require HTML::TagCloud; 1; }) {
2287                 $cloud = HTML::TagCloud->new;
2288                 foreach (sort keys %ctags_lc) {
2289                         # Pad the title with spaces so that the cloud looks
2290                         # less crammed.
2291                         my $title = $ctags_lc{$_}->{topname};
2292                         $title =~ s/ /&nbsp;/g;
2293                         $title =~ s/^/&nbsp;/g;
2294                         $title =~ s/$/&nbsp;/g;
2295                         $cloud->add($title, href(action=>$action, ctag_filter=>$_),
2296                                     $ctags_lc{$_}->{count});
2297                 }
2298         } else {
2299                 $cloud = \%ctags_lc;
2300         }
2301         $cloud;
2302 }
2303
2304 sub git_show_project_tagcloud {
2305         my ($cloud, $count, $action) = @_;
2306         print STDERR ref($cloud)."..\n";
2307         if (ref $cloud eq 'HTML::TagCloud') {
2308                 return $cloud->html_and_css($count);
2309         } else {
2310                 my @tags = sort { $cloud->{$a}->{count} <=> $cloud->{$b}->{count} } keys %$cloud;
2311                 return '<p align="center">' . join (', ', map {
2312                         $cgi->a({-href => href(action=>$action, ctag_filter=>$_)},
2313                                 $cloud->{$_}->{topname});
2314                 } splice(@tags, 0, $count)) . '</p>';
2315         }
2316 }
2317
2318 sub git_get_project_url_list {
2319         my $path = shift;
2320
2321         $git_dir = "$projectroot/$path";
2322         open my $fd, '<', "$git_dir/cloneurl"
2323                 or return wantarray ?
2324                 @{ config_to_multi(git_get_project_config('url')) } :
2325                    config_to_multi(git_get_project_config('url'));
2326         my @git_project_url_list = map { chomp; $_ } <$fd>;
2327         close $fd;
2328
2329         return wantarray ? @git_project_url_list : \@git_project_url_list;
2330 }
2331
2332 sub git_get_projects_list {
2333         my ($filter) = @_;
2334         my @list;
2335
2336         $filter ||= '';
2337         $filter =~ s/\.git$//;
2338
2339         my $check_forks = gitweb_check_feature('forks');
2340
2341         if (-d $projects_list) {
2342                 # search in directory
2343                 my $dir = $projects_list . ($filter ? "/$filter" : '');
2344                 # remove the trailing "/"
2345                 $dir =~ s!/+$!!;
2346                 my $pfxlen = length("$dir");
2347                 my $pfxdepth = ($dir =~ tr!/!!);
2348
2349                 File::Find::find({
2350                         follow_fast => 1, # follow symbolic links
2351                         follow_skip => 2, # ignore duplicates
2352                         dangling_symlinks => 0, # ignore dangling symlinks, silently
2353                         wanted => sub {
2354                                 # skip project-list toplevel, if we get it.
2355                                 return if (m!^[/.]$!);
2356                                 # only directories can be git repositories
2357                                 return unless (-d $_);
2358                                 # don't traverse too deep (Find is super slow on os x)
2359                                 if (($File::Find::name =~ tr!/!!) - $pfxdepth > $project_maxdepth) {
2360                                         $File::Find::prune = 1;
2361                                         return;
2362                                 }
2363
2364                                 my $subdir = substr($File::Find::name, $pfxlen + 1);
2365                                 # we check related file in $projectroot
2366                                 my $path = ($filter ? "$filter/" : '') . $subdir;
2367                                 if (check_export_ok("$projectroot/$path")) {
2368                                         push @list, { path => $path };
2369                                         $File::Find::prune = 1;
2370                                 }
2371                         },
2372                 }, "$dir");
2373
2374         } elsif (-f $projects_list) {
2375                 # read from file(url-encoded):
2376                 # 'git%2Fgit.git Linus+Torvalds'
2377                 # 'libs%2Fklibc%2Fklibc.git H.+Peter+Anvin'
2378                 # 'linux%2Fhotplug%2Fudev.git Greg+Kroah-Hartman'
2379                 my %paths;
2380                 open my $fd, '<', $projects_list or return;
2381         PROJECT:
2382                 while (my $line = <$fd>) {
2383                         chomp $line;
2384                         my ($path, $owner) = split ' ', $line;
2385                         $path = unescape($path);
2386                         $owner = unescape($owner);
2387                         if (!defined $path) {
2388                                 next;
2389                         }
2390                         if ($filter ne '') {
2391                                 # looking for forks;
2392                                 my $pfx = substr($path, 0, length($filter));
2393                                 if ($pfx ne $filter) {
2394                                         next PROJECT;
2395                                 }
2396                                 my $sfx = substr($path, length($filter));
2397                                 if ($sfx !~ /^\/.*\.git$/) {
2398                                         next PROJECT;
2399                                 }
2400                         } elsif ($check_forks) {
2401                         PATH:
2402                                 foreach my $filter (keys %paths) {
2403                                         # looking for forks;
2404                                         my $pfx = substr($path, 0, length($filter));
2405                                         if ($pfx ne $filter) {
2406                                                 next PATH;
2407                                         }
2408                                         my $sfx = substr($path, length($filter));
2409                                         if ($sfx !~ /^\/.*\.git$/) {
2410                                                 next PATH;
2411                                         }
2412                                         # is a fork, don't include it in
2413                                         # the list
2414                                         next PROJECT;
2415                                 }
2416                         }
2417                         if (check_export_ok("$projectroot/$path")) {
2418                                 my $pr = {
2419                                         path => $path,
2420                                         owner => to_utf8($owner),
2421                                 };
2422                                 push @list, $pr;
2423                                 (my $forks_path = $path) =~ s/\.git$//;
2424                                 $paths{$forks_path}++;
2425                         }
2426                 }
2427                 close $fd;
2428         }
2429         return @list;
2430 }
2431
2432 our $gitweb_project_owner = undef;
2433 sub git_get_project_list_from_file {
2434
2435         return if (defined $gitweb_project_owner);
2436
2437         $gitweb_project_owner = {};
2438         # read from file (url-encoded):
2439         # 'git%2Fgit.git Linus+Torvalds'
2440         # 'libs%2Fklibc%2Fklibc.git H.+Peter+Anvin'
2441         # 'linux%2Fhotplug%2Fudev.git Greg+Kroah-Hartman'
2442         if (-f $projects_list) {
2443                 open(my $fd, '<', $projects_list);
2444                 while (my $line = <$fd>) {
2445                         chomp $line;
2446                         my ($pr, $ow) = split ' ', $line;
2447                         $pr = unescape($pr);
2448                         $ow = unescape($ow);
2449                         $gitweb_project_owner->{$pr} = to_utf8($ow);
2450                 }
2451                 close $fd;
2452         }
2453 }
2454
2455 sub git_get_project_owner {
2456         my $project = shift;
2457         my $owner;
2458
2459         return undef unless $project;
2460         $git_dir = "$projectroot/$project";
2461
2462         if (!defined $gitweb_project_owner) {
2463                 git_get_project_list_from_file();
2464         }
2465
2466         if (exists $gitweb_project_owner->{$project}) {
2467                 $owner = $gitweb_project_owner->{$project};
2468         }
2469         if (!defined $owner){
2470                 $owner = git_get_project_config('owner');
2471         }
2472         if (!defined $owner) {
2473                 $owner = get_file_owner("$git_dir");
2474         }
2475
2476         return $owner;
2477 }
2478
2479 sub git_get_last_activity {
2480         my ($path) = @_;
2481         my $fd;
2482
2483         $git_dir = "$projectroot/$path";
2484         open($fd, "-|", git_cmd(), 'for-each-ref',
2485              '--format=%(committer)',
2486              '--sort=-committerdate',
2487              '--count=1',
2488              'refs/heads') or return;
2489         my $most_recent = <$fd>;
2490         close $fd or return;
2491         if (defined $most_recent &&
2492             $most_recent =~ / (\d+) [-+][01]\d\d\d$/) {
2493                 my $timestamp = $1;
2494                 my $age = time - $timestamp;
2495                 return ($age, age_string($age));
2496         }
2497         return (undef, undef);
2498 }
2499
2500 sub git_get_references {
2501         my $type = shift || "";
2502         my %refs;
2503         # 5dc01c595e6c6ec9ccda4f6f69c131c0dd945f8c refs/tags/v2.6.11
2504         # c39ae07f393806ccf406ef966e9a15afc43cc36a refs/tags/v2.6.11^{}
2505         open my $fd, "-|", git_cmd(), "show-ref", "--dereference",
2506                 ($type ? ("--", "refs/$type") : ()) # use -- <pattern> if $type
2507                 or return;
2508
2509         while (my $line = <$fd>) {
2510                 chomp $line;
2511                 if ($line =~ m!^([0-9a-fA-F]{40})\srefs/($type.*)$!) {
2512                         if (defined $refs{$1}) {
2513                                 push @{$refs{$1}}, $2;
2514                         } else {
2515                                 $refs{$1} = [ $2 ];
2516                         }
2517                 }
2518         }
2519         close $fd or return;
2520         return \%refs;
2521 }
2522
2523 sub git_get_rev_name_tags {
2524         my $hash = shift || return undef;
2525
2526         open my $fd, "-|", git_cmd(), "name-rev", "--tags", $hash
2527                 or return;
2528         my $name_rev = <$fd>;
2529         close $fd;
2530
2531         if ($name_rev =~ m|^$hash tags/(.*)$|) {
2532                 return $1;
2533         } else {
2534                 # catches also '$hash undefined' output
2535                 return undef;
2536         }
2537 }
2538
2539 ## ----------------------------------------------------------------------
2540 ## parse to hash functions
2541
2542 sub parse_date {
2543         my $epoch = shift;
2544         my $tz = shift || "-0000";
2545
2546         my %date;
2547         my @months = ("Jan", "Feb", "Mar", "Apr", "May", "Jun", "Jul", "Aug", "Sep", "Oct", "Nov", "Dec");
2548         my @days = ("Sun", "Mon", "Tue", "Wed", "Thu", "Fri", "Sat");
2549         my ($sec, $min, $hour, $mday, $mon, $year, $wday, $yday) = gmtime($epoch);
2550         $date{'hour'} = $hour;
2551         $date{'minute'} = $min;
2552         $date{'mday'} = $mday;
2553         $date{'day'} = $days[$wday];
2554         $date{'month'} = $months[$mon];
2555         $date{'rfc2822'}   = sprintf "%s, %d %s %4d %02d:%02d:%02d +0000",
2556                              $days[$wday], $mday, $months[$mon], 1900+$year, $hour ,$min, $sec;
2557         $date{'mday-time'} = sprintf "%d %s %02d:%02d",
2558                              $mday, $months[$mon], $hour ,$min;
2559         $date{'iso-8601'}  = sprintf "%04d-%02d-%02dT%02d:%02d:%02dZ",
2560                              1900+$year, 1+$mon, $mday, $hour ,$min, $sec;
2561
2562         $tz =~ m/^([+\-][0-9][0-9])([0-9][0-9])$/;
2563         my $local = $epoch + ((int $1 + ($2/60)) * 3600);
2564         ($sec, $min, $hour, $mday, $mon, $year, $wday, $yday) = gmtime($local);
2565         $date{'hour_local'} = $hour;
2566         $date{'minute_local'} = $min;
2567         $date{'tz_local'} = $tz;
2568         $date{'iso-tz'} = sprintf("%04d-%02d-%02d %02d:%02d:%02d %s",
2569                                   1900+$year, $mon+1, $mday,
2570                                   $hour, $min, $sec, $tz);
2571         return %date;
2572 }
2573
2574 sub parse_tag {
2575         my $tag_id = shift;
2576         my %tag;
2577         my @comment;
2578
2579         open my $fd, "-|", git_cmd(), "cat-file", "tag", $tag_id or return;
2580         $tag{'id'} = $tag_id;
2581         while (my $line = <$fd>) {
2582                 chomp $line;
2583                 if ($line =~ m/^object ([0-9a-fA-F]{40})$/) {
2584                         $tag{'object'} = $1;
2585                 } elsif ($line =~ m/^type (.+)$/) {
2586                         $tag{'type'} = $1;
2587                 } elsif ($line =~ m/^tag (.+)$/) {
2588                         $tag{'name'} = $1;
2589                 } elsif ($line =~ m/^tagger (.*) ([0-9]+) (.*)$/) {
2590                         $tag{'author'} = $1;
2591                         $tag{'author_epoch'} = $2;
2592                         $tag{'author_tz'} = $3;
2593                         if ($tag{'author'} =~ m/^([^<]+) <([^>]*)>/) {
2594                                 $tag{'author_name'}  = $1;
2595                                 $tag{'author_email'} = $2;
2596                         } else {
2597                                 $tag{'author_name'} = $tag{'author'};
2598                         }
2599                 } elsif ($line =~ m/--BEGIN/) {
2600                         push @comment, $line;
2601                         last;
2602                 } elsif ($line eq "") {
2603                         last;
2604                 }
2605         }
2606         push @comment, <$fd>;
2607         $tag{'comment'} = \@comment;
2608         close $fd or return;
2609         if (!defined $tag{'name'}) {
2610                 return
2611         };
2612         return %tag
2613 }
2614
2615 sub parse_commit_text {
2616         my ($commit_text, $withparents) = @_;
2617         my @commit_lines = split '\n', $commit_text;
2618         my %co;
2619
2620         pop @commit_lines; # Remove '\0'
2621
2622         if (! @commit_lines) {
2623                 return;
2624         }
2625
2626         my $header = shift @commit_lines;
2627         if ($header !~ m/^[0-9a-fA-F]{40}/) {
2628                 return;
2629         }
2630         ($co{'id'}, my @parents) = split ' ', $header;
2631         while (my $line = shift @commit_lines) {
2632                 last if $line eq "\n";
2633                 if ($line =~ m/^tree ([0-9a-fA-F]{40})$/) {
2634                         $co{'tree'} = $1;
2635                 } elsif ((!defined $withparents) && ($line =~ m/^parent ([0-9a-fA-F]{40})$/)) {
2636                         push @parents, $1;
2637                 } elsif ($line =~ m/^author (.*) ([0-9]+) (.*)$/) {
2638                         $co{'author'} = to_utf8($1);
2639                         $co{'author_epoch'} = $2;
2640                         $co{'author_tz'} = $3;
2641                         if ($co{'author'} =~ m/^([^<]+) <([^>]*)>/) {
2642                                 $co{'author_name'}  = $1;
2643                                 $co{'author_email'} = $2;
2644                         } else {
2645                                 $co{'author_name'} = $co{'author'};
2646                         }
2647                 } elsif ($line =~ m/^committer (.*) ([0-9]+) (.*)$/) {
2648                         $co{'committer'} = to_utf8($1);
2649                         $co{'committer_epoch'} = $2;
2650                         $co{'committer_tz'} = $3;
2651                         if ($co{'committer'} =~ m/^([^<]+) <([^>]*)>/) {
2652                                 $co{'committer_name'}  = $1;
2653                                 $co{'committer_email'} = $2;
2654                         } else {
2655                                 $co{'committer_name'} = $co{'committer'};
2656                         }
2657                 }
2658         }
2659         if (!defined $co{'tree'}) {
2660                 return;
2661         };
2662         $co{'parents'} = \@parents;
2663         $co{'parent'} = $parents[0];
2664
2665         foreach my $title (@commit_lines) {
2666                 $title =~ s/^    //;
2667                 if ($title ne "") {
2668                         $co{'title'} = chop_str($title, 80, 5);
2669                         # remove leading stuff of merges to make the interesting part visible
2670                         if (length($title) > 50) {
2671                                 $title =~ s/^Automatic //;
2672                                 $title =~ s/^merge (of|with) /Merge ... /i;
2673                                 if (length($title) > 50) {
2674                                         $title =~ s/(http|rsync):\/\///;
2675                                 }
2676                                 if (length($title) > 50) {
2677                                         $title =~ s/(master|www|rsync)\.//;
2678                                 }
2679                                 if (length($title) > 50) {
2680                                         $title =~ s/kernel.org:?//;
2681                                 }
2682                                 if (length($title) > 50) {
2683                                         $title =~ s/\/pub\/scm//;
2684                                 }
2685                         }
2686                         $co{'title_short'} = chop_str($title, 50, 5);
2687                         last;
2688                 }
2689         }
2690         if (! defined $co{'title'} || $co{'title'} eq "") {
2691                 $co{'title'} = $co{'title_short'} = '(no commit message)';
2692         }
2693         # remove added spaces
2694         foreach my $line (@commit_lines) {
2695                 $line =~ s/^    //;
2696         }
2697         $co{'comment'} = \@commit_lines;
2698
2699         my $age = time - $co{'committer_epoch'};
2700         $co{'age'} = $age;
2701         $co{'age_string'} = age_string($age);
2702         my ($sec, $min, $hour, $mday, $mon, $year, $wday, $yday) = gmtime($co{'committer_epoch'});
2703         if ($age > 60*60*24*7*2) {
2704                 $co{'age_string_date'} = sprintf "%4i-%02u-%02i", 1900 + $year, $mon+1, $mday;
2705                 $co{'age_string_age'} = $co{'age_string'};
2706         } else {
2707                 $co{'age_string_date'} = $co{'age_string'};
2708                 $co{'age_string_age'} = sprintf "%4i-%02u-%02i", 1900 + $year, $mon+1, $mday;
2709         }
2710         return %co;
2711 }
2712
2713 sub parse_commit {
2714         my ($commit_id) = @_;
2715         my %co;
2716
2717         local $/ = "\0";
2718
2719         open my $fd, "-|", git_cmd(), "rev-list",
2720                 "--parents",
2721                 "--header",
2722                 "--max-count=1",
2723                 $commit_id,
2724                 "--",
2725                 or die_error(500, "Open git-rev-list failed");
2726         %co = parse_commit_text(<$fd>, 1);
2727         close $fd;
2728
2729         return %co;
2730 }
2731
2732 sub parse_commits {
2733         my ($commit_id, $maxcount, $skip, $filename, @args) = @_;
2734         my @cos;
2735
2736         $maxcount ||= 1;
2737         $skip ||= 0;
2738
2739         local $/ = "\0";
2740
2741         open my $fd, "-|", git_cmd(), "rev-list",
2742                 "--header",
2743                 @args,
2744                 ("--max-count=" . $maxcount),
2745                 ("--skip=" . $skip),
2746                 @extra_options,
2747                 $commit_id,
2748                 "--",
2749                 ($filename ? ($filename) : ())
2750                 or die_error(500, "Open git-rev-list failed");
2751         while (my $line = <$fd>) {
2752                 my %co = parse_commit_text($line);
2753                 push @cos, \%co;
2754         }
2755         close $fd;
2756
2757         return wantarray ? @cos : \@cos;
2758 }
2759
2760 # parse line of git-diff-tree "raw" output
2761 sub parse_difftree_raw_line {
2762         my $line = shift;
2763         my %res;
2764
2765         # ':100644 100644 03b218260e99b78c6df0ed378e59ed9205ccc96d 3b93d5e7cc7f7dd4ebed13a5cc1a4ad976fc94d8 M   ls-files.c'
2766         # ':100644 100644 7f9281985086971d3877aca27704f2aaf9c448ce bc190ebc71bbd923f2b728e505408f5e54bd073a M   rev-tree.c'
2767         if ($line =~ m/^:([0-7]{6}) ([0-7]{6}) ([0-9a-fA-F]{40}) ([0-9a-fA-F]{40}) (.)([0-9]{0,3})\t(.*)$/) {
2768                 $res{'from_mode'} = $1;
2769                 $res{'to_mode'} = $2;
2770                 $res{'from_id'} = $3;
2771                 $res{'to_id'} = $4;
2772                 $res{'status'} = $5;
2773                 $res{'similarity'} = $6;
2774                 if ($res{'status'} eq 'R' || $res{'status'} eq 'C') { # renamed or copied
2775                         ($res{'from_file'}, $res{'to_file'}) = map { unquote($_) } split("\t", $7);
2776                 } else {
2777                         $res{'from_file'} = $res{'to_file'} = $res{'file'} = unquote($7);
2778                 }
2779         }
2780         # '::100755 100755 100755 60e79ca1b01bc8b057abe17ddab484699a7f5fdb 94067cc5f73388f33722d52ae02f44692bc07490 94067cc5f73388f33722d52ae02f44692bc07490 MR git-gui/git-gui.sh'
2781         # combined diff (for merge commit)
2782         elsif ($line =~ s/^(::+)((?:[0-7]{6} )+)((?:[0-9a-fA-F]{40} )+)([a-zA-Z]+)\t(.*)$//) {
2783                 $res{'nparents'}  = length($1);
2784                 $res{'from_mode'} = [ split(' ', $2) ];
2785                 $res{'to_mode'} = pop @{$res{'from_mode'}};
2786                 $res{'from_id'} = [ split(' ', $3) ];
2787                 $res{'to_id'} = pop @{$res{'from_id'}};
2788                 $res{'status'} = [ split('', $4) ];
2789                 $res{'to_file'} = unquote($5);
2790         }
2791         # 'c512b523472485aef4fff9e57b229d9d243c967f'
2792         elsif ($line =~ m/^([0-9a-fA-F]{40})$/) {
2793                 $res{'commit'} = $1;
2794         }
2795
2796         return wantarray ? %res : \%res;
2797 }
2798
2799 # wrapper: return parsed line of git-diff-tree "raw" output
2800 # (the argument might be raw line, or parsed info)
2801 sub parsed_difftree_line {
2802         my $line_or_ref = shift;
2803
2804         if (ref($line_or_ref) eq "HASH") {
2805                 # pre-parsed (or generated by hand)
2806                 return $line_or_ref;
2807         } else {
2808                 return parse_difftree_raw_line($line_or_ref);
2809         }
2810 }
2811
2812 # parse line of git-ls-tree output
2813 sub parse_ls_tree_line {
2814         my $line = shift;
2815         my %opts = @_;
2816         my %res;
2817
2818         if ($opts{'-l'}) {
2819                 #'100644 blob 0fa3f3a66fb6a137f6ec2c19351ed4d807070ffa   16717  panic.c'
2820                 $line =~ m/^([0-9]+) (.+) ([0-9a-fA-F]{40}) +(-|[0-9]+)\t(.+)$/s;
2821
2822                 $res{'mode'} = $1;
2823                 $res{'type'} = $2;
2824                 $res{'hash'} = $3;
2825                 $res{'size'} = $4;
2826                 if ($opts{'-z'}) {
2827                         $res{'name'} = $5;
2828                 } else {
2829                         $res{'name'} = unquote($5);
2830                 }
2831         } else {
2832                 #'100644 blob 0fa3f3a66fb6a137f6ec2c19351ed4d807070ffa  panic.c'
2833                 $line =~ m/^([0-9]+) (.+) ([0-9a-fA-F]{40})\t(.+)$/s;
2834
2835                 $res{'mode'} = $1;
2836                 $res{'type'} = $2;
2837                 $res{'hash'} = $3;
2838                 if ($opts{'-z'}) {
2839                         $res{'name'} = $4;
2840                 } else {
2841                         $res{'name'} = unquote($4);
2842                 }
2843         }
2844
2845         return wantarray ? %res : \%res;
2846 }
2847
2848 # generates _two_ hashes, references to which are passed as 2 and 3 argument
2849 sub parse_from_to_diffinfo {
2850         my ($diffinfo, $from, $to, @parents) = @_;
2851
2852         if ($diffinfo->{'nparents'}) {
2853                 # combined diff
2854                 $from->{'file'} = [];
2855                 $from->{'href'} = [];
2856                 fill_from_file_info($diffinfo, @parents)
2857                         unless exists $diffinfo->{'from_file'};
2858                 for (my $i = 0; $i < $diffinfo->{'nparents'}; $i++) {
2859                         $from->{'file'}[$i] =
2860                                 defined $diffinfo->{'from_file'}[$i] ?
2861                                         $diffinfo->{'from_file'}[$i] :
2862                                         $diffinfo->{'to_file'};
2863                         if ($diffinfo->{'status'}[$i] ne "A") { # not new (added) file
2864                                 $from->{'href'}[$i] = href(action=>"blob",
2865                                                            hash_base=>$parents[$i],
2866                                                            hash=>$diffinfo->{'from_id'}[$i],
2867                                                            file_name=>$from->{'file'}[$i]);
2868                         } else {
2869                                 $from->{'href'}[$i] = undef;
2870                         }
2871                 }
2872         } else {
2873                 # ordinary (not combined) diff
2874                 $from->{'file'} = $diffinfo->{'from_file'};
2875                 if ($diffinfo->{'status'} ne "A") { # not new (added) file
2876                         $from->{'href'} = href(action=>"blob", hash_base=>$hash_parent,
2877                                                hash=>$diffinfo->{'from_id'},
2878                                                file_name=>$from->{'file'});
2879                 } else {
2880                         delete $from->{'href'};
2881                 }
2882         }
2883
2884         $to->{'file'} = $diffinfo->{'to_file'};
2885         if (!is_deleted($diffinfo)) { # file exists in result
2886                 $to->{'href'} = href(action=>"blob", hash_base=>$hash,
2887                                      hash=>$diffinfo->{'to_id'},
2888                                      file_name=>$to->{'file'});
2889         } else {
2890                 delete $to->{'href'};
2891         }
2892 }
2893
2894 ## ......................................................................
2895 ## parse to array of hashes functions
2896
2897 sub git_get_heads_list {
2898         my $limit = shift;
2899         my @headslist;
2900
2901         open my $fd, '-|', git_cmd(), 'for-each-ref',
2902                 ($limit ? '--count='.($limit+1) : ()), '--sort=-committerdate',
2903                 '--format=%(objectname) %(refname) %(subject)%00%(committer)',
2904                 'refs/heads'
2905                 or return;
2906         while (my $line = <$fd>) {
2907                 my %ref_item;
2908
2909                 chomp $line;
2910                 my ($refinfo, $committerinfo) = split(/\0/, $line);
2911                 my ($hash, $name, $title) = split(' ', $refinfo, 3);
2912                 my ($committer, $epoch, $tz) =
2913                         ($committerinfo =~ /^(.*) ([0-9]+) (.*)$/);
2914                 $ref_item{'fullname'}  = $name;
2915                 $name =~ s!^refs/heads/!!;
2916
2917                 $ref_item{'name'}  = $name;
2918                 $ref_item{'id'}    = $hash;
2919                 $ref_item{'title'} = $title || '(no commit message)';
2920                 $ref_item{'epoch'} = $epoch;
2921                 if ($epoch) {
2922                         $ref_item{'age'} = age_string(time - $ref_item{'epoch'});
2923                 } else {
2924                         $ref_item{'age'} = "unknown";
2925                 }
2926
2927                 push @headslist, \%ref_item;
2928         }
2929         close $fd;
2930
2931         return wantarray ? @headslist : \@headslist;
2932 }
2933
2934 sub git_get_tags_list {
2935         my $limit = shift;
2936         my @tagslist;
2937
2938         open my $fd, '-|', git_cmd(), 'for-each-ref',
2939                 ($limit ? '--count='.($limit+1) : ()), '--sort=-creatordate',
2940                 '--format=%(objectname) %(objecttype) %(refname) '.
2941                 '%(*objectname) %(*objecttype) %(subject)%00%(creator)',
2942                 'refs/tags'
2943                 or return;
2944         while (my $line = <$fd>) {
2945                 my %ref_item;
2946
2947                 chomp $line;
2948                 my ($refinfo, $creatorinfo) = split(/\0/, $line);
2949                 my ($id, $type, $name, $refid, $reftype, $title) = split(' ', $refinfo, 6);
2950                 my ($creator, $epoch, $tz) =
2951                         ($creatorinfo =~ /^(.*) ([0-9]+) (.*)$/);
2952                 $ref_item{'fullname'} = $name;
2953                 $name =~ s!^refs/tags/!!;
2954
2955                 $ref_item{'type'} = $type;
2956                 $ref_item{'id'} = $id;
2957                 $ref_item{'name'} = $name;
2958                 if ($type eq "tag") {
2959                         $ref_item{'subject'} = $title;
2960                         $ref_item{'reftype'} = $reftype;
2961                         $ref_item{'refid'}   = $refid;
2962                 } else {
2963                         $ref_item{'reftype'} = $type;
2964                         $ref_item{'refid'}   = $id;
2965                 }
2966
2967                 if ($type eq "tag" || $type eq "commit") {
2968                         $ref_item{'epoch'} = $epoch;
2969                         if ($epoch) {
2970                                 $ref_item{'age'} = age_string(time - $ref_item{'epoch'});
2971                         } else {
2972                                 $ref_item{'age'} = "unknown";
2973                         }
2974                 }
2975
2976                 push @tagslist, \%ref_item;
2977         }
2978         close $fd;
2979
2980         return wantarray ? @tagslist : \@tagslist;
2981 }
2982
2983 ## ----------------------------------------------------------------------
2984 ## filesystem-related functions
2985
2986 sub get_file_owner {
2987         my $path = shift;
2988
2989         my ($dev, $ino, $mode, $nlink, $st_uid, $st_gid, $rdev, $size) = stat($path);
2990         my ($name, $passwd, $uid, $gid, $quota, $comment, $gcos, $dir, $shell) = getpwuid($st_uid);
2991         if (!defined $gcos) {
2992                 return undef;
2993         }
2994         my $owner = $gcos;
2995         $owner =~ s/[,;].*$//;
2996         return to_utf8($owner);
2997 }
2998
2999 # assume that file exists
3000 sub insert_file {
3001         my $filename = shift;
3002
3003         open my $fd, '<', $filename;
3004         print map { to_utf8($_) } <$fd>;
3005         close $fd;
3006 }
3007
3008 ## ......................................................................
3009 ## mimetype related functions
3010
3011 sub mimetype_guess_file {
3012         my $filename = shift;
3013         my $mimemap = shift;
3014         -r $mimemap or return undef;
3015
3016         my %mimemap;
3017         open(my $mh, '<', $mimemap) or return undef;
3018         while (<$mh>) {
3019                 next if m/^#/; # skip comments
3020                 my ($mimetype, $exts) = split(/\t+/);
3021                 if (defined $exts) {
3022                         my @exts = split(/\s+/, $exts);
3023                         foreach my $ext (@exts) {
3024                                 $mimemap{$ext} = $mimetype;
3025                         }
3026                 }
3027         }
3028         close($mh);
3029
3030         $filename =~ /\.([^.]*)$/;
3031         return $mimemap{$1};
3032 }
3033
3034 sub mimetype_guess {
3035         my $filename = shift;
3036         my $mime;
3037         $filename =~ /\./ or return undef;
3038
3039         if ($mimetypes_file) {
3040                 my $file = $mimetypes_file;
3041                 if ($file !~ m!^/!) { # if it is relative path
3042                         # it is relative to project
3043                         $file = "$projectroot/$project/$file";
3044                 }
3045                 $mime = mimetype_guess_file($filename, $file);
3046         }
3047         $mime ||= mimetype_guess_file($filename, '/etc/mime.types');
3048         return $mime;
3049 }
3050
3051 sub blob_mimetype {
3052         my $fd = shift;
3053         my $filename = shift;
3054
3055         if ($filename) {
3056                 my $mime = mimetype_guess($filename);
3057                 $mime and return $mime;
3058         }
3059
3060         # just in case
3061         return $default_blob_plain_mimetype unless $fd;
3062
3063         if (-T $fd) {
3064                 return 'text/plain';
3065         } elsif (! $filename) {
3066                 return 'application/octet-stream';
3067         } elsif ($filename =~ m/\.png$/i) {
3068                 return 'image/png';
3069         } elsif ($filename =~ m/\.gif$/i) {
3070                 return 'image/gif';
3071         } elsif ($filename =~ m/\.jpe?g$/i) {
3072                 return 'image/jpeg';
3073         } else {
3074                 return 'application/octet-stream';
3075         }
3076 }
3077
3078 sub blob_contenttype {
3079         my ($fd, $file_name, $type) = @_;
3080
3081         $type ||= blob_mimetype($fd, $file_name);
3082         if ($type eq 'text/plain' && defined $default_text_plain_charset) {
3083                 $type .= "; charset=$default_text_plain_charset";
3084         }
3085
3086         return $type;
3087 }
3088
3089 ## ======================================================================
3090 ## functions printing HTML: header, footer, error page
3091
3092 sub git_header_html {
3093         my $status = shift || "200 OK";
3094         my $expires = shift;
3095
3096         my $title = "$site_name";
3097         if (defined $project) {
3098                 $title .= " - " . to_utf8($project);
3099                 if (defined $action) {
3100                         $title .= "/$action";
3101                         if (defined $file_name) {
3102                                 $title .= " - " . esc_path($file_name);
3103                                 if ($action eq "tree" && $file_name !~ m|/$|) {
3104                                         $title .= "/";
3105                                 }
3106                         }
3107                 }
3108         }
3109         my $content_type;
3110         # require explicit support from the UA if we are to send the page as
3111         # 'application/xhtml+xml', otherwise send it as plain old 'text/html'.
3112         # we have to do this because MSIE sometimes globs '*/*', pretending to
3113         # support xhtml+xml but choking when it gets what it asked for.
3114         if (defined $cgi->http('HTTP_ACCEPT') &&
3115             $cgi->http('HTTP_ACCEPT') =~ m/(,|;|\s|^)application\/xhtml\+xml(,|;|\s|$)/ &&
3116             $cgi->Accept('application/xhtml+xml') != 0) {
3117                 $content_type = 'application/xhtml+xml';
3118         } else {
3119                 $content_type = 'text/html';
3120         }
3121         print $cgi->header(-type=>$content_type, -charset => 'utf-8',
3122                            -status=> $status, -expires => $expires);
3123         my $mod_perl_version = $ENV{'MOD_PERL'} ? " $ENV{'MOD_PERL'}" : '';
3124         print <<EOF;
3125 <?xml version="1.0" encoding="utf-8"?>
3126 <!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Strict//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-strict.dtd">
3127 <html xmlns="http://www.w3.org/1999/xhtml" xml:lang="en-US" lang="en-US">
3128 <!-- git web interface version $version, (C) 2005-2006, Kay Sievers <kay.sievers\@vrfy.org>, Christian Gierke -->
3129 <!-- git core binaries version $git_version -->
3130 <head>
3131 <meta http-equiv="content-type" content="$content_type; charset=utf-8"/>
3132 <meta name="generator" content="gitweb/$version git/$git_version$mod_perl_version"/>
3133 <meta name="robots" content="index, nofollow"/>
3134 <title>$title</title>
3135 EOF
3136         # the stylesheet, favicon etc urls won't work correctly with path_info
3137         # unless we set the appropriate base URL
3138         if ($ENV{'PATH_INFO'}) {
3139                 print "<base href=\"".esc_url($base_url)."\" />\n";
3140         }
3141         # print out each stylesheet that exist, providing backwards capability
3142         # for those people who defined $stylesheet in a config file
3143         if (defined $stylesheet) {
3144                 print '<link rel="stylesheet" type="text/css" href="'.$stylesheet.'"/>'."\n";
3145         } else {
3146                 foreach my $stylesheet (@stylesheets) {
3147                         next unless $stylesheet;
3148                         print '<link rel="stylesheet" type="text/css" href="'.$stylesheet.'"/>'."\n";
3149                 }
3150         }
3151         if (defined $project) {
3152                 my %href_params = get_feed_info();
3153                 if (!exists $href_params{'-title'}) {
3154                         $href_params{'-title'} = 'log';
3155                 }
3156
3157                 foreach my $format qw(RSS Atom) {
3158                         my $type = lc($format);
3159                         my %link_attr = (
3160                                 '-rel' => 'alternate',
3161                                 '-title' => "$project - $href_params{'-title'} - $format feed",
3162                                 '-type' => "application/$type+xml"
3163                         );
3164
3165                         $href_params{'action'} = $type;
3166                         $link_attr{'-href'} = href(%href_params);
3167                         print "<link ".
3168                               "rel=\"$link_attr{'-rel'}\" ".
3169                               "title=\"$link_attr{'-title'}\" ".
3170                               "href=\"$link_attr{'-href'}\" ".
3171                               "type=\"$link_attr{'-type'}\" ".
3172                               "/>\n";
3173
3174                         $href_params{'extra_options'} = '--no-merges';
3175                         $link_attr{'-href'} = href(%href_params);
3176                         $link_attr{'-title'} .= ' (no merges)';
3177                         print "<link ".
3178                               "rel=\"$link_attr{'-rel'}\" ".
3179                               "title=\"$link_attr{'-title'}\" ".
3180                               "href=\"$link_attr{'-href'}\" ".
3181                               "type=\"$link_attr{'-type'}\" ".
3182                               "/>\n";
3183                 }
3184
3185         } else {
3186                 printf('<link rel="alternate" title="%s projects list" '.
3187                        'href="%s" type="text/plain; charset=utf-8" />'."\n",
3188                        $site_name, href(project=>undef, action=>"project_index"));
3189                 printf('<link rel="alternate" title="%s projects feeds" '.
3190                        'href="%s" type="text/x-opml" />'."\n",
3191                        $site_name, href(project=>undef, action=>"opml"));
3192         }
3193         if (defined $favicon) {
3194                 print qq(<link rel="shortcut icon" href="$favicon" type="image/png" />\n);
3195         }
3196
3197         print "</head>\n" .
3198               "<body>\n";
3199
3200         if (-f $site_header) {
3201                 insert_file($site_header);
3202         }
3203
3204         print "<div class=\"page_header\">\n" .
3205               $cgi->a({-href => esc_url($logo_url),
3206                        -title => $logo_label},
3207                       qq(<img src="$logo" width="72" height="27" alt="git" class="logo"/>));
3208         print $cgi->a({-href => esc_url($home_link)}, $home_link_str) . " / ";
3209         if (defined $project) {
3210                 print $cgi->a({-href => href(action=>"summary")}, esc_html($project));
3211                 if (defined $action) {
3212                         print " / $action";
3213                 }
3214                 print "\n";
3215         }
3216         print "</div>\n";
3217
3218         my $have_search = gitweb_check_feature('search');
3219         if (defined $project && $have_search) {
3220                 if (!defined $searchtext) {
3221                         $searchtext = "";
3222                 }
3223                 my $search_hash;
3224                 if (defined $hash_base) {
3225                         $search_hash = $hash_base;
3226                 } elsif (defined $hash) {
3227                         $search_hash = $hash;
3228                 } else {
3229                         $search_hash = "HEAD";
3230                 }
3231                 my $action = $my_uri;
3232                 my $use_pathinfo = gitweb_check_feature('pathinfo');
3233                 if ($use_pathinfo) {
3234                         $action .= "/".esc_url($project);
3235                 }
3236                 print $cgi->startform(-method => "get", -action => $action) .
3237                       "<div class=\"search\">\n" .
3238                       (!$use_pathinfo &&
3239                       $cgi->input({-name=>"p", -value=>$project, -type=>"hidden"}) . "\n") .
3240                       $cgi->input({-name=>"a", -value=>"search", -type=>"hidden"}) . "\n" .
3241                       $cgi->input({-name=>"h", -value=>$search_hash, -type=>"hidden"}) . "\n" .
3242                       $cgi->popup_menu(-name => 'st', -default => 'commit',
3243                                        -values => ['commit', 'grep', 'author', 'committer', 'pickaxe']) .
3244                       $cgi->sup($cgi->a({-href => href(action=>"search_help")}, "?")) .
3245                       " search:\n",
3246                       $cgi->textfield(-name => "s", -value => $searchtext) . "\n" .
3247                       "<span title=\"Extended regular expression\">" .
3248                       $cgi->checkbox(-name => 'sr', -value => 1, -label => 're',
3249                                      -checked => $search_use_regexp) .
3250                       "</span>" .
3251                       "</div>" .
3252                       $cgi->end_form() . "\n";
3253         }
3254 }
3255
3256 sub git_footer_html {
3257         my $feed_class = 'rss_logo';
3258
3259         print "<div class=\"page_footer\">\n";
3260         if (defined $project) {
3261                 my $descr = git_get_project_description($project);
3262                 if (defined $descr) {
3263                         print "<div class=\"page_footer_text\">" . esc_html($descr) . "</div>\n";
3264                 }
3265
3266                 my %href_params = get_feed_info();
3267                 if (!%href_params) {
3268                         $feed_class .= ' generic';
3269                 }
3270                 $href_params{'-title'} ||= 'log';
3271
3272                 foreach my $format qw(RSS Atom) {
3273                         $href_params{'action'} = lc($format);
3274                         print $cgi->a({-href => href(%href_params),
3275                                       -title => "$href_params{'-title'} $format feed",
3276                                       -class => $feed_class}, $format)."\n";
3277                 }
3278
3279         } else {
3280                 print $cgi->a({-href => href(project=>undef, action=>"opml"),
3281                               -class => $feed_class}, "OPML") . " ";
3282                 print $cgi->a({-href => href(project=>undef, action=>"project_index"),
3283                               -class => $feed_class}, "TXT") . "\n";
3284         }
3285         print "</div>\n"; # class="page_footer"
3286
3287         if (-f $site_footer) {
3288                 insert_file($site_footer);
3289         }
3290
3291         print "</body>\n" .
3292               "</html>";
3293 }
3294
3295 # die_error(<http_status_code>, <error_message>)
3296 # Example: die_error(404, 'Hash not found')
3297 # By convention, use the following status codes (as defined in RFC 2616):
3298 # 400: Invalid or missing CGI parameters, or
3299 #      requested object exists but has wrong type.
3300 # 403: Requested feature (like "pickaxe" or "snapshot") not enabled on
3301 #      this server or project.
3302 # 404: Requested object/revision/project doesn't exist.
3303 # 500: The server isn't configured properly, or
3304 #      an internal error occurred (e.g. failed assertions caused by bugs), or
3305 #      an unknown error occurred (e.g. the git binary died unexpectedly).
3306 sub die_error {
3307         my $status = shift || 500;
3308         my $error = shift || "Internal server error";
3309
3310         my %http_responses = (400 => '400 Bad Request',
3311                               403 => '403 Forbidden',
3312                               404 => '404 Not Found',
3313                               500 => '500 Internal Server Error');
3314         git_header_html($http_responses{$status});
3315         print <<EOF;
3316 <div class="page_body">
3317 <br /><br />
3318 $status - $error
3319 <br />
3320 </div>
3321 EOF
3322         git_footer_html();
3323         exit;
3324 }
3325
3326 ## ----------------------------------------------------------------------
3327 ## functions printing or outputting HTML: navigation
3328
3329 sub git_print_page_nav {
3330         my ($current, $suppress, $head, $treehead, $treebase, $extra) = @_;
3331         $extra = '' if !defined $extra; # pager or formats
3332
3333         my @navs = qw(summary shortlog log commit commitdiff tree);
3334         if ($suppress) {
3335                 @navs = grep { $_ ne $suppress } @navs;
3336         }
3337
3338         my %arg = map { $_ => {action=>$_} } @navs;
3339         if (defined $head) {
3340                 for (qw(commit commitdiff)) {
3341                         $arg{$_}{'hash'} = $head;
3342                 }
3343                 if ($current =~ m/^(tree | log | shortlog | commit | commitdiff | search)$/x) {
3344                         for (qw(shortlog log)) {
3345                                 $arg{$_}{'hash'} = $head;
3346                         }
3347                 }
3348         }
3349
3350         $arg{'tree'}{'hash'} = $treehead if defined $treehead;
3351         $arg{'tree'}{'hash_base'} = $treebase if defined $treebase;
3352
3353         my @actions = gitweb_get_feature('actions');
3354         my %repl = (
3355                 '%' => '%',
3356                 'n' => $project,         # project name
3357                 'f' => $git_dir,         # project path within filesystem
3358                 'h' => $treehead || '',  # current hash ('h' parameter)
3359                 'b' => $treebase || '',  # hash base ('hb' parameter)
3360         );
3361         while (@actions) {
3362                 my ($label, $link, $pos) = splice(@actions,0,3);
3363                 # insert
3364                 @navs = map { $_ eq $pos ? ($_, $label) : $_ } @navs;
3365                 # munch munch
3366                 $link =~ s/%([%nfhb])/$repl{$1}/g;
3367                 $arg{$label}{'_href'} = $link;
3368         }
3369
3370         print "<div class=\"page_nav\">\n" .
3371                 (join " | ",
3372                  map { $_ eq $current ?
3373                        $_ : $cgi->a({-href => ($arg{$_}{_href} ? $arg{$_}{_href} : href(%{$arg{$_}}))}, "$_")
3374                  } @navs);
3375         print "<br/>\n$extra<br/>\n" .
3376               "</div>\n";
3377 }
3378
3379 sub format_paging_nav {
3380         my ($action, $hash, $head, $page, $has_next_link) = @_;
3381         my $paging_nav;
3382
3383
3384         if ($hash ne $head || $page) {
3385                 $paging_nav .= $cgi->a({-href => href(action=>$action)}, "HEAD");
3386         } else {
3387                 $paging_nav .= "HEAD";
3388         }
3389
3390         if ($page > 0) {
3391                 $paging_nav .= " &sdot; " .
3392                         $cgi->a({-href => href(-replay=>1, page=>$page-1),
3393                                  -accesskey => "p", -title => "Alt-p"}, "prev");
3394         } else {
3395                 $paging_nav .= " &sdot; prev";
3396         }
3397
3398         if ($has_next_link) {
3399                 $paging_nav .= " &sdot; " .
3400                         $cgi->a({-href => href(-replay=>1, page=>$page+1),
3401                                  -accesskey => "n", -title => "Alt-n"}, "next");
3402         } else {
3403                 $paging_nav .= " &sdot; next";
3404         }
3405
3406         return $paging_nav;
3407 }
3408
3409 ## ......................................................................
3410 ## functions printing or outputting HTML: div
3411
3412 sub git_print_header_div {
3413         my ($action, $title, $hash, $hash_base) = @_;
3414         my %args = ();
3415
3416         $args{'action'} = $action;
3417         $args{'hash'} = $hash if $hash;
3418         $args{'hash_base'} = $hash_base if $hash_base;
3419
3420         print "<div class=\"header\">\n" .
3421               $cgi->a({-href => href(%args), -class => "title"},
3422               $title ? $title : $action) .
3423               "\n</div>\n";
3424 }
3425
3426 sub print_local_time {
3427         my %date = @_;
3428         if ($date{'hour_local'} < 6) {
3429                 printf(" (<span class=\"atnight\">%02d:%02d</span> %s)",
3430                         $date{'hour_local'}, $date{'minute_local'}, $date{'tz_local'});
3431         } else {
3432                 printf(" (%02d:%02d %s)",
3433                         $date{'hour_local'}, $date{'minute_local'}, $date{'tz_local'});
3434         }
3435 }
3436
3437 # Outputs the author name and date in long form
3438 sub git_print_authorship {
3439         my $co = shift;
3440         my %opts = @_;
3441         my $tag = $opts{-tag} || 'div';
3442         my $author = $co->{'author_name'};
3443
3444         my %ad = parse_date($co->{'author_epoch'}, $co->{'author_tz'});
3445         print "<$tag class=\"author_date\">" .
3446               format_search_author($author, "author", esc_html($author)) .
3447               " [$ad{'rfc2822'}";
3448         print_local_time(%ad) if ($opts{-localtime});
3449         print "]" . git_get_avatar($co->{'author_email'}, -pad_before => 1)
3450                   . "</$tag>\n";
3451 }
3452
3453 # Outputs table rows containing the full author or committer information,
3454 # in the format expected for 'commit' view (& similia).
3455 # Parameters are a commit hash reference, followed by the list of people
3456 # to output information for. If the list is empty it defalts to both
3457 # author and committer.
3458 sub git_print_authorship_rows {
3459         my $co = shift;
3460         # too bad we can't use @people = @_ || ('author', 'committer')
3461         my @people = @_;
3462         @people = ('author', 'committer') unless @people;
3463         foreach my $who (@people) {
3464                 my %wd = parse_date($co->{"${who}_epoch"}, $co->{"${who}_tz"});
3465                 print "<tr><td>$who</td><td>" .
3466                       format_search_author($co->{"${who}_name"}, $who,
3467                                esc_html($co->{"${who}_name"})) . " " .
3468                       format_search_author($co->{"${who}_email"}, $who,
3469                                esc_html("<" . $co->{"${who}_email"} . ">")) .
3470                       "</td><td rowspan=\"2\">" .
3471                       git_get_avatar($co->{"${who}_email"}, -size => 'double') .
3472                       "</td></tr>\n" .
3473                       "<tr>" .
3474                       "<td></td><td> $wd{'rfc2822'}";
3475                 print_local_time(%wd);
3476                 print "</td>" .
3477                       "</tr>\n";
3478         }
3479 }
3480
3481 sub git_print_page_path {
3482         my $name = shift;
3483         my $type = shift;
3484         my $hb = shift;
3485
3486
3487         print "<div class=\"page_path\">";
3488         print $cgi->a({-href => href(action=>"tree", hash_base=>$hb),
3489                       -title => 'tree root'}, to_utf8("[$project]"));
3490         print " / ";
3491         if (defined $name) {
3492                 my @dirname = split '/', $name;
3493                 my $basename = pop @dirname;
3494                 my $fullname = '';
3495
3496                 foreach my $dir (@dirname) {
3497                         $fullname .= ($fullname ? '/' : '') . $dir;
3498                         print $cgi->a({-href => href(action=>"tree", file_name=>$fullname,
3499                                                      hash_base=>$hb),
3500                                       -title => $fullname}, esc_path($dir));
3501                         print " / ";
3502                 }
3503                 if (defined $type && $type eq 'blob') {
3504                         print $cgi->a({-href => href(action=>"blob_plain", file_name=>$file_name,
3505                                                      hash_base=>$hb),
3506                                       -title => $name}, esc_path($basename));
3507                 } elsif (defined $type && $type eq 'tree') {
3508                         print $cgi->a({-href => href(action=>"tree", file_name=>$file_name,
3509                                                      hash_base=>$hb),
3510                                       -title => $name}, esc_path($basename));
3511                         print " / ";
3512                 } else {
3513                         print esc_path($basename);
3514                 }
3515         }
3516         print "<br/></div>\n";
3517 }
3518
3519 sub git_print_log {
3520         my $log = shift;
3521         my %opts = @_;
3522
3523         if ($opts{'-remove_title'}) {
3524                 # remove title, i.e. first line of log
3525                 shift @$log;
3526         }
3527         # remove leading empty lines
3528         while (defined $log->[0] && $log->[0] eq "") {
3529                 shift @$log;
3530         }
3531
3532         # print log
3533         my $signoff = 0;
3534         my $empty = 0;
3535         foreach my $line (@$log) {
3536                 if ($line =~ m/^ *(signed[ \-]off[ \-]by[ :]|acked[ \-]by[ :]|cc[ :])/i) {
3537                         $signoff = 1;
3538                         $empty = 0;
3539                         if (! $opts{'-remove_signoff'}) {
3540                                 print "<span class=\"signoff\">" . esc_html($line) . "</span><br/>\n";
3541                                 next;
3542                         } else {
3543                                 # remove signoff lines
3544                                 next;
3545                         }
3546                 } else {
3547                         $signoff = 0;
3548                 }
3549
3550                 # print only one empty line
3551                 # do not print empty line after signoff
3552                 if ($line eq "") {
3553                         next if ($empty || $signoff);
3554                         $empty = 1;
3555                 } else {
3556                         $empty = 0;
3557                 }
3558
3559                 print format_log_line_html($line) . "<br/>\n";
3560         }
3561
3562         if ($opts{'-final_empty_line'}) {
3563                 # end with single empty line
3564                 print "<br/>\n" unless $empty;
3565         }
3566 }
3567
3568 # return link target (what link points to)
3569 sub git_get_link_target {
3570         my $hash = shift;
3571         my $link_target;
3572
3573         # read link
3574         open my $fd, "-|", git_cmd(), "cat-file", "blob", $hash
3575                 or return;
3576         {
3577                 local $/ = undef;
3578                 $link_target = <$fd>;
3579         }
3580         close $fd
3581                 or return;
3582
3583         return $link_target;
3584 }
3585
3586 # given link target, and the directory (basedir) the link is in,
3587 # return target of link relative to top directory (top tree);
3588 # return undef if it is not possible (including absolute links).
3589 sub normalize_link_target {
3590         my ($link_target, $basedir) = @_;
3591
3592         # absolute symlinks (beginning with '/') cannot be normalized
3593         return if (substr($link_target, 0, 1) eq '/');
3594
3595         # normalize link target to path from top (root) tree (dir)
3596         my $path;
3597         if ($basedir) {
3598                 $path = $basedir . '/' . $link_target;
3599         } else {
3600                 # we are in top (root) tree (dir)
3601                 $path = $link_target;
3602         }
3603
3604         # remove //, /./, and /../
3605         my @path_parts;
3606         foreach my $part (split('/', $path)) {
3607                 # discard '.' and ''
3608                 next if (!$part || $part eq '.');
3609                 # handle '..'
3610                 if ($part eq '..') {
3611                         if (@path_parts) {
3612                                 pop @path_parts;
3613                         } else {
3614                                 # link leads outside repository (outside top dir)
3615                                 return;
3616                         }
3617                 } else {
3618                         push @path_parts, $part;
3619                 }
3620         }
3621         $path = join('/', @path_parts);
3622
3623         return $path;
3624 }
3625
3626 # print tree entry (row of git_tree), but without encompassing <tr> element
3627 sub git_print_tree_entry {
3628         my ($t, $basedir, $hash_base, $have_blame) = @_;
3629
3630         my %base_key = ();
3631         $base_key{'hash_base'} = $hash_base if defined $hash_base;
3632
3633         # The format of a table row is: mode list link.  Where mode is
3634         # the mode of the entry, list is the name of the entry, an href,
3635         # and link is the action links of the entry.
3636
3637         print "<td class=\"mode\">" . mode_str($t->{'mode'}) . "</td>\n";
3638         if (exists $t->{'size'}) {
3639                 print "<td class=\"size\">$t->{'size'}</td>\n";
3640         }
3641         if ($t->{'type'} eq "blob") {
3642                 print "<td class=\"list\">" .
3643                         $cgi->a({-href => href(action=>"blob", hash=>$t->{'hash'},
3644                                                file_name=>"$basedir$t->{'name'}", %base_key),
3645                                 -class => "list"}, esc_path($t->{'name'}));
3646                 if (S_ISLNK(oct $t->{'mode'})) {
3647                         my $link_target = git_get_link_target($t->{'hash'});
3648                         if ($link_target) {
3649                                 my $norm_target = normalize_link_target($link_target, $basedir);
3650                                 if (defined $norm_target) {
3651                                         print " -> " .
3652                                               $cgi->a({-href => href(action=>"object", hash_base=>$hash_base,
3653                                                                      file_name=>$norm_target),
3654                                                        -title => $norm_target}, esc_path($link_target));
3655                                 } else {
3656                                         print " -> " . esc_path($link_target);
3657                                 }
3658                         }
3659                 }
3660                 print "</td>\n";
3661                 print "<td class=\"link\">";
3662                 print $cgi->a({-href => href(action=>"blob", hash=>$t->{'hash'},
3663                                              file_name=>"$basedir$t->{'name'}", %base_key)},
3664                               "blob");
3665                 if ($have_blame) {
3666                         print " | " .
3667                               $cgi->a({-href => href(action=>"blame", hash=>$t->{'hash'},
3668                                                      file_name=>"$basedir$t->{'name'}", %base_key)},
3669                                       "blame");
3670                 }
3671                 if (defined $hash_base) {
3672                         print " | " .
3673                               $cgi->a({-href => href(action=>"history", hash_base=>$hash_base,
3674                                                      hash=>$t->{'hash'}, file_name=>"$basedir$t->{'name'}")},
3675                                       "history");
3676                 }
3677                 print " | " .
3678                         $cgi->a({-href => href(action=>"blob_plain", hash_base=>$hash_base,
3679                                                file_name=>"$basedir$t->{'name'}")},
3680                                 "raw");
3681                 print "</td>\n";
3682
3683         } elsif ($t->{'type'} eq "tree") {
3684                 print "<td class=\"list\">";
3685                 print $cgi->a({-href => href(action=>"tree", hash=>$t->{'hash'},
3686                                              file_name=>"$basedir$t->{'name'}",
3687                                              %base_key)},
3688                               esc_path($t->{'name'}));
3689                 print "</td>\n";
3690                 print "<td class=\"link\">";
3691                 print $cgi->a({-href => href(action=>"tree", hash=>$t->{'hash'},
3692                                              file_name=>"$basedir$t->{'name'}",
3693                                              %base_key)},
3694                               "tree");
3695                 if (defined $hash_base) {
3696                         print " | " .
3697                               $cgi->a({-href => href(action=>"history", hash_base=>$hash_base,
3698                                                      file_name=>"$basedir$t->{'name'}")},
3699                                       "history");
3700                 }
3701                 print "</td>\n";
3702         } else {
3703                 # unknown object: we can only present history for it
3704                 # (this includes 'commit' object, i.e. submodule support)
3705                 print "<td class=\"list\">" .
3706                       esc_path($t->{'name'}) .
3707                       "</td>\n";
3708                 print "<td class=\"link\">";
3709                 if (defined $hash_base) {
3710                         print $cgi->a({-href => href(action=>"history",
3711                                                      hash_base=>$hash_base,
3712                                                      file_name=>"$basedir$t->{'name'}")},
3713                                       "history");
3714                 }
3715                 print "</td>\n";
3716         }
3717 }
3718
3719 ## ......................................................................
3720 ## functions printing large fragments of HTML
3721
3722 # get pre-image filenames for merge (combined) diff
3723 sub fill_from_file_info {
3724         my ($diff, @parents) = @_;
3725
3726         $diff->{'from_file'} = [ ];
3727         $diff->{'from_file'}[$diff->{'nparents'} - 1] = undef;
3728         for (my $i = 0; $i < $diff->{'nparents'}; $i++) {
3729                 if ($diff->{'status'}[$i] eq 'R' ||
3730                     $diff->{'status'}[$i] eq 'C') {
3731                         $diff->{'from_file'}[$i] =
3732                                 git_get_path_by_hash($parents[$i], $diff->{'from_id'}[$i]);
3733                 }
3734         }
3735
3736         return $diff;
3737 }
3738
3739 # is current raw difftree line of file deletion
3740 sub is_deleted {
3741         my $diffinfo = shift;
3742
3743         return $diffinfo->{'to_id'} eq ('0' x 40);
3744 }
3745
3746 # does patch correspond to [previous] difftree raw line
3747 # $diffinfo  - hashref of parsed raw diff format
3748 # $patchinfo - hashref of parsed patch diff format
3749 #              (the same keys as in $diffinfo)
3750 sub is_patch_split {
3751         my ($diffinfo, $patchinfo) = @_;
3752
3753         return defined $diffinfo && defined $patchinfo
3754                 && $diffinfo->{'to_file'} eq $patchinfo->{'to_file'};
3755 }
3756
3757
3758 sub git_difftree_body {
3759         my ($difftree, $hash, @parents) = @_;
3760         my ($parent) = $parents[0];
3761         my $have_blame = gitweb_check_feature('blame');
3762         print "<div class=\"list_head\">\n";
3763         if ($#{$difftree} > 10) {
3764                 print(($#{$difftree} + 1) . " files changed:\n");
3765         }
3766         print "</div>\n";
3767
3768         print "<table class=\"" .
3769               (@parents > 1 ? "combined " : "") .
3770               "diff_tree\">\n";
3771
3772         # header only for combined diff in 'commitdiff' view
3773         my $has_header = @$difftree && @parents > 1 && $action eq 'commitdiff';
3774         if ($has_header) {
3775                 # table header
3776                 print "<thead><tr>\n" .
3777                        "<th></th><th></th>\n"; # filename, patchN link
3778                 for (my $i = 0; $i < @parents; $i++) {
3779                         my $par = $parents[$i];
3780                         print "<th>" .
3781                               $cgi->a({-href => href(action=>"commitdiff",
3782                                                      hash=>$hash, hash_parent=>$par),
3783                                        -title => 'commitdiff to parent number ' .
3784                                                   ($i+1) . ': ' . substr($par,0,7)},
3785                                       $i+1) .
3786                               "&nbsp;</th>\n";
3787                 }
3788                 print "</tr></thead>\n<tbody>\n";
3789         }
3790
3791         my $alternate = 1;
3792         my $patchno = 0;
3793         foreach my $line (@{$difftree}) {
3794                 my $diff = parsed_difftree_line($line);
3795
3796                 if ($alternate) {
3797                         print "<tr class=\"dark\">\n";
3798                 } else {
3799                         print "<tr class=\"light\">\n";
3800                 }
3801                 $alternate ^= 1;
3802
3803                 if (exists $diff->{'nparents'}) { # combined diff
3804
3805                         fill_from_file_info($diff, @parents)
3806                                 unless exists $diff->{'from_file'};
3807
3808                         if (!is_deleted($diff)) {
3809                                 # file exists in the result (child) commit
3810                                 print "<td>" .
3811                                       $cgi->a({-href => href(action=>"blob", hash=>$diff->{'to_id'},
3812                                                              file_name=>$diff->{'to_file'},
3813                                                              hash_base=>$hash),
3814                                               -class => "list"}, esc_path($diff->{'to_file'})) .
3815                                       "</td>\n";
3816                         } else {
3817                                 print "<td>" .
3818                                       esc_path($diff->{'to_file'}) .
3819                                       "</td>\n";
3820                         }
3821
3822                         if ($action eq 'commitdiff') {
3823                                 # link to patch
3824                                 $patchno++;
3825                                 print "<td class=\"link\">" .
3826                                       $cgi->a({-href => "#patch$patchno"}, "patch") .
3827                                       " | " .
3828                                       "</td>\n";
3829                         }
3830
3831                         my $has_history = 0;
3832                         my $not_deleted = 0;
3833                         for (my $i = 0; $i < $diff->{'nparents'}; $i++) {
3834                                 my $hash_parent = $parents[$i];
3835                                 my $from_hash = $diff->{'from_id'}[$i];
3836                                 my $from_path = $diff->{'from_file'}[$i];
3837                                 my $status = $diff->{'status'}[$i];
3838
3839                                 $has_history ||= ($status ne 'A');
3840                                 $not_deleted ||= ($status ne 'D');
3841
3842                                 if ($status eq 'A') {
3843                                         print "<td  class=\"link\" align=\"right\"> | </td>\n";
3844                                 } elsif ($status eq 'D') {
3845                                         print "<td class=\"link\">" .
3846                                               $cgi->a({-href => href(action=>"blob",
3847                                                                      hash_base=>$hash,
3848                                                                      hash=>$from_hash,
3849                                                                      file_name=>$from_path)},
3850                                                       "blob" . ($i+1)) .
3851                                               " | </td>\n";
3852                                 } else {
3853                                         if ($diff->{'to_id'} eq $from_hash) {
3854                                                 print "<td class=\"link nochange\">";
3855                                         } else {
3856                                                 print "<td class=\"link\">";
3857                                         }
3858                                         print $cgi->a({-href => href(action=>"blobdiff",
3859                                                                      hash=>$diff->{'to_id'},
3860                                                                      hash_parent=>$from_hash,
3861                                                                      hash_base=>$hash,
3862                                                                      hash_parent_base=>$hash_parent,
3863                                                                      file_name=>$diff->{'to_file'},
3864                                                                      file_parent=>$from_path)},
3865                                                       "diff" . ($i+1)) .
3866                                               " | </td>\n";
3867                                 }
3868                         }
3869
3870                         print "<td class=\"link\">";
3871                         if ($not_deleted) {
3872                                 print $cgi->a({-href => href(action=>"blob",
3873                                                              hash=>$diff->{'to_id'},
3874                                                              file_name=>$diff->{'to_file'},
3875                                                              hash_base=>$hash)},
3876                                               "blob");
3877                                 print " | " if ($has_history);
3878                         }
3879                         if ($has_history) {
3880                                 print $cgi->a({-href => href(action=>"history",
3881                                                              file_name=>$diff->{'to_file'},
3882                                                              hash_base=>$hash)},
3883                                               "history");
3884                         }
3885                         print "</td>\n";
3886
3887                         print "</tr>\n";
3888                         next; # instead of 'else' clause, to avoid extra indent
3889                 }
3890                 # else ordinary diff
3891
3892                 my ($to_mode_oct, $to_mode_str, $to_file_type);
3893                 my ($from_mode_oct, $from_mode_str, $from_file_type);
3894                 if ($diff->{'to_mode'} ne ('0' x 6)) {
3895                         $to_mode_oct = oct $diff->{'to_mode'};
3896                         if (S_ISREG($to_mode_oct)) { # only for regular file
3897                                 $to_mode_str = sprintf("%04o", $to_mode_oct & 0777); # permission bits
3898                         }
3899                         $to_file_type = file_type($diff->{'to_mode'});
3900                 }
3901                 if ($diff->{'from_mode'} ne ('0' x 6)) {
3902                         $from_mode_oct = oct $diff->{'from_mode'};
3903                         if (S_ISREG($to_mode_oct)) { # only for regular file
3904                                 $from_mode_str = sprintf("%04o", $from_mode_oct & 0777); # permission bits
3905                         }
3906                         $from_file_type = file_type($diff->{'from_mode'});
3907                 }
3908
3909                 if ($diff->{'status'} eq "A") { # created
3910                         my $mode_chng = "<span class=\"file_status new\">[new $to_file_type";
3911                         $mode_chng   .= " with mode: $to_mode_str" if $to_mode_str;
3912                         $mode_chng   .= "]</span>";
3913                         print "<td>";
3914                         print $cgi->a({-href => href(action=>"blob", hash=>$diff->{'to_id'},
3915                                                      hash_base=>$hash, file_name=>$diff->{'file'}),
3916                                       -class => "list"}, esc_path($diff->{'file'}));
3917                         print "</td>\n";
3918                         print "<td>$mode_chng</td>\n";
3919                         print "<td class=\"link\">";
3920                         if ($action eq 'commitdiff') {
3921                                 # link to patch
3922                                 $patchno++;
3923                                 print $cgi->a({-href => "#patch$patchno"}, "patch");
3924                                 print " | ";
3925                         }
3926                         print $cgi->a({-href => href(action=>"blob", hash=>$diff->{'to_id'},
3927                                                      hash_base=>$hash, file_name=>$diff->{'file'})},
3928                                       "blob");
3929                         print "</td>\n";
3930
3931                 } elsif ($diff->{'status'} eq "D") { # deleted
3932                         my $mode_chng = "<span class=\"file_status deleted\">[deleted $from_file_type]</span>";
3933                         print "<td>";
3934                         print $cgi->a({-href => href(action=>"blob", hash=>$diff->{'from_id'},
3935                                                      hash_base=>$parent, file_name=>$diff->{'file'}),
3936                                        -class => "list"}, esc_path($diff->{'file'}));
3937                         print "</td>\n";
3938                         print "<td>$mode_chng</td>\n";
3939                         print "<td class=\"link\">";
3940                         if ($action eq 'commitdiff') {
3941                                 # link to patch
3942                                 $patchno++;
3943                                 print $cgi->a({-href => "#patch$patchno"}, "patch");
3944                                 print " | ";
3945                         }
3946                         print $cgi->a({-href => href(action=>"blob", hash=>$diff->{'from_id'},
3947                                                      hash_base=>$parent, file_name=>$diff->{'file'})},
3948                                       "blob") . " | ";
3949                         if ($have_blame) {
3950                                 print $cgi->a({-href => href(action=>"blame", hash_base=>$parent,
3951                                                              file_name=>$diff->{'file'})},
3952                                               "blame") . " | ";
3953                         }
3954                         print $cgi->a({-href => href(action=>"history", hash_base=>$parent,
3955                                                      file_name=>$diff->{'file'})},
3956                                       "history");
3957                         print "</td>\n";
3958
3959                 } elsif ($diff->{'status'} eq "M" || $diff->{'status'} eq "T") { # modified, or type changed
3960                         my $mode_chnge = "";
3961                         if ($diff->{'from_mode'} != $diff->{'to_mode'}) {
3962                                 $mode_chnge = "<span class=\"file_status mode_chnge\">[changed";
3963                                 if ($from_file_type ne $to_file_type) {
3964                                         $mode_chnge .= " from $from_file_type to $to_file_type";
3965                                 }
3966                                 if (($from_mode_oct & 0777) != ($to_mode_oct & 0777)) {
3967                                         if ($from_mode_str && $to_mode_str) {
3968                                                 $mode_chnge .= " mode: $from_mode_str->$to_mode_str";
3969                                         } elsif ($to_mode_str) {
3970                                                 $mode_chnge .= " mode: $to_mode_str";
3971                                         }
3972                                 }
3973                                 $mode_chnge .= "]</span>\n";
3974                         }
3975                         print "<td>";
3976                         print $cgi->a({-href => href(action=>"blob", hash=>$diff->{'to_id'},
3977                                                      hash_base=>$hash, file_name=>$diff->{'file'}),
3978                                       -class => "list"}, esc_path($diff->{'file'}));
3979                         print "</td>\n";
3980                         print "<td>$mode_chnge</td>\n";
3981                         print "<td class=\"link\">";
3982                         if ($action eq 'commitdiff') {
3983                                 # link to patch
3984                                 $patchno++;
3985                                 print $cgi->a({-href => "#patch$patchno"}, "patch") .
3986                                       " | ";
3987                         } elsif ($diff->{'to_id'} ne $diff->{'from_id'}) {
3988                                 # "commit" view and modified file (not onlu mode changed)
3989                                 print $cgi->a({-href => href(action=>"blobdiff",
3990                                                              hash=>$diff->{'to_id'}, hash_parent=>$diff->{'from_id'},
3991                                                              hash_base=>$hash, hash_parent_base=>$parent,
3992                                                              file_name=>$diff->{'file'})},
3993                                               "diff") .
3994                                       " | ";
3995                         }
3996                         print $cgi->a({-href => href(action=>"blob", hash=>$diff->{'to_id'},
3997                                                      hash_base=>$hash, file_name=>$diff->{'file'})},
3998                                        "blob") . " | ";
3999                         if ($have_blame) {
4000                                 print $cgi->a({-href => href(action=>"blame", hash_base=>$hash,
4001                                                              file_name=>$diff->{'file'})},
4002                                               "blame") . " | ";
4003                         }
4004                         print $cgi->a({-href => href(action=>"history", hash_base=>$hash,
4005                                                      file_name=>$diff->{'file'})},
4006                                       "history");
4007                         print "</td>\n";
4008
4009                 } elsif ($diff->{'status'} eq "R" || $diff->{'status'} eq "C") { # renamed or copied
4010                         my %status_name = ('R' => 'moved', 'C' => 'copied');
4011                         my $nstatus = $status_name{$diff->{'status'}};
4012                         my $mode_chng = "";
4013                         if ($diff->{'from_mode'} != $diff->{'to_mode'}) {
4014                                 # mode also for directories, so we cannot use $to_mode_str
4015                                 $mode_chng = sprintf(", mode: %04o", $to_mode_oct & 0777);
4016                         }
4017                         print "<td>" .
4018                               $cgi->a({-href => href(action=>"blob", hash_base=>$hash,
4019                                                      hash=>$diff->{'to_id'}, file_name=>$diff->{'to_file'}),
4020                                       -class => "list"}, esc_path($diff->{'to_file'})) . "</td>\n" .
4021                               "<td><span class=\"file_status $nstatus\">[$nstatus from " .
4022                               $cgi->a({-href => href(action=>"blob", hash_base=>$parent,
4023                                                      hash=>$diff->{'from_id'}, file_name=>$diff->{'from_file'}),
4024                                       -class => "list"}, esc_path($diff->{'from_file'})) .
4025                               " with " . (int $diff->{'similarity'}) . "% similarity$mode_chng]</span></td>\n" .
4026                               "<td class=\"link\">";
4027                         if ($action eq 'commitdiff') {
4028                                 # link to patch
4029                                 $patchno++;
4030                                 print $cgi->a({-href => "#patch$patchno"}, "patch") .
4031                                       " | ";
4032                         } elsif ($diff->{'to_id'} ne $diff->{'from_id'}) {
4033                                 # "commit" view and modified file (not only pure rename or copy)
4034                                 print $cgi->a({-href => href(action=>"blobdiff",
4035                                                              hash=>$diff->{'to_id'}, hash_parent=>$diff->{'from_id'},
4036                                                              hash_base=>$hash, hash_parent_base=>$parent,
4037                                                              file_name=>$diff->{'to_file'}, file_parent=>$diff->{'from_file'})},
4038                                               "diff") .
4039                                       " | ";
4040                         }
4041                         print $cgi->a({-href => href(action=>"blob", hash=>$diff->{'to_id'},
4042                                                      hash_base=>$parent, file_name=>$diff->{'to_file'})},
4043                                       "blob") . " | ";
4044                         if ($have_blame) {
4045                                 print $cgi->a({-href => href(action=>"blame", hash_base=>$hash,
4046                                                              file_name=>$diff->{'to_file'})},
4047                                               "blame") . " | ";
4048                         }
4049                         print $cgi->a({-href => href(action=>"history", hash_base=>$hash,
4050                                                     file_name=>$diff->{'to_file'})},
4051                                       "history");
4052                         print "</td>\n";
4053
4054                 } # we should not encounter Unmerged (U) or Unknown (X) status
4055                 print "</tr>\n";
4056         }
4057         print "</tbody>" if $has_header;
4058         print "</table>\n";
4059 }
4060
4061 sub git_patchset_body {
4062         my ($fd, $difftree, $hash, @hash_parents) = @_;
4063         my ($hash_parent) = $hash_parents[0];
4064
4065         my $is_combined = (@hash_parents > 1);
4066         my $patch_idx = 0;
4067         my $patch_number = 0;
4068         my $patch_line;
4069         my $diffinfo;
4070         my $to_name;
4071         my (%from, %to);
4072
4073         print "<div class=\"patchset\">\n";
4074
4075         # skip to first patch
4076         while ($patch_line = <$fd>) {
4077                 chomp $patch_line;
4078
4079                 last if ($patch_line =~ m/^diff /);
4080         }
4081
4082  PATCH:
4083         while ($patch_line) {
4084
4085                 # parse "git diff" header line
4086                 if ($patch_line =~ m/^diff --git (\"(?:[^\\\"]*(?:\\.[^\\\"]*)*)\"|[^ "]*) (.*)$/) {
4087                         # $1 is from_name, which we do not use
4088                         $to_name = unquote($2);
4089                         $to_name =~ s!^b/!!;
4090                 } elsif ($patch_line =~ m/^diff --(cc|combined) ("?.*"?)$/) {
4091                         # $1 is 'cc' or 'combined', which we do not use
4092                         $to_name = unquote($2);
4093                 } else {
4094                         $to_name = undef;
4095                 }
4096
4097                 # check if current patch belong to current raw line
4098                 # and parse raw git-diff line if needed
4099                 if (is_patch_split($diffinfo, { 'to_file' => $to_name })) {
4100                         # this is continuation of a split patch
4101                         print "<div class=\"patch cont\">\n";
4102                 } else {
4103                         # advance raw git-diff output if needed
4104                         $patch_idx++ if defined $diffinfo;
4105
4106                         # read and prepare patch information
4107                         $diffinfo = parsed_difftree_line($difftree->[$patch_idx]);
4108
4109                         # compact combined diff output can have some patches skipped
4110                         # find which patch (using pathname of result) we are at now;
4111                         if ($is_combined) {
4112                                 while ($to_name ne $diffinfo->{'to_file'}) {
4113                                         print "<div class=\"patch\" id=\"patch". ($patch_idx+1) ."\">\n" .
4114                                               format_diff_cc_simplified($diffinfo, @hash_parents) .
4115                                               "</div>\n";  # class="patch"
4116
4117                                         $patch_idx++;
4118                                         $patch_number++;
4119
4120                                         last if $patch_idx > $#$difftree;
4121                                         $diffinfo = parsed_difftree_line($difftree->[$patch_idx]);
4122                                 }
4123                         }
4124
4125                         # modifies %from, %to hashes
4126                         parse_from_to_diffinfo($diffinfo, \%from, \%to, @hash_parents);
4127
4128                         # this is first patch for raw difftree line with $patch_idx index
4129                         # we index @$difftree array from 0, but number patches from 1
4130                         print "<div class=\"patch\" id=\"patch". ($patch_idx+1) ."\">\n";
4131                 }
4132
4133                 # git diff header
4134                 #assert($patch_line =~ m/^diff /) if DEBUG;
4135                 #assert($patch_line !~ m!$/$!) if DEBUG; # is chomp-ed
4136                 $patch_number++;
4137                 # print "git diff" header
4138                 print format_git_diff_header_line($patch_line, $diffinfo,
4139                                                   \%from, \%to);
4140
4141                 # print extended diff header
4142                 print "<div class=\"diff extended_header\">\n";
4143         EXTENDED_HEADER:
4144                 while ($patch_line = <$fd>) {
4145                         chomp $patch_line;
4146
4147                         last EXTENDED_HEADER if ($patch_line =~ m/^--- |^diff /);
4148
4149                         print format_extended_diff_header_line($patch_line, $diffinfo,
4150                                                                \%from, \%to);
4151                 }
4152                 print "</div>\n"; # class="diff extended_header"
4153
4154                 # from-file/to-file diff header
4155                 if (! $patch_line) {
4156                         print "</div>\n"; # class="patch"
4157                         last PATCH;
4158                 }
4159                 next PATCH if ($patch_line =~ m/^diff /);
4160                 #assert($patch_line =~ m/^---/) if DEBUG;
4161
4162                 my $last_patch_line = $patch_line;
4163                 $patch_line = <$fd>;
4164                 chomp $patch_line;
4165                 #assert($patch_line =~ m/^\+\+\+/) if DEBUG;
4166
4167                 print format_diff_from_to_header($last_patch_line, $patch_line,
4168                                                  $diffinfo, \%from, \%to,
4169                                                  @hash_parents);
4170
4171                 # the patch itself
4172         LINE:
4173                 while ($patch_line = <$fd>) {
4174                         chomp $patch_line;
4175
4176                         next PATCH if ($patch_line =~ m/^diff /);
4177
4178                         print format_diff_line($patch_line, \%from, \%to);
4179                 }
4180
4181         } continue {
4182                 print "</div>\n"; # class="patch"
4183         }
4184
4185         # for compact combined (--cc) format, with chunk and patch simpliciaction
4186         # patchset might be empty, but there might be unprocessed raw lines
4187         for (++$patch_idx if $patch_number > 0;
4188              $patch_idx < @$difftree;
4189              ++$patch_idx) {
4190                 # read and prepare patch information
4191                 $diffinfo = parsed_difftree_line($difftree->[$patch_idx]);
4192
4193                 # generate anchor for "patch" links in difftree / whatchanged part
4194                 print "<div class=\"patch\" id=\"patch". ($patch_idx+1) ."\">\n" .
4195                       format_diff_cc_simplified($diffinfo, @hash_parents) .
4196                       "</div>\n";  # class="patch"
4197
4198                 $patch_number++;
4199         }
4200
4201         if ($patch_number == 0) {
4202                 if (@hash_parents > 1) {
4203                         print "<div class=\"diff nodifferences\">Trivial merge</div>\n";
4204                 } else {
4205                         print "<div class=\"diff nodifferences\">No differences found</div>\n";
4206                 }
4207         }
4208
4209         print "</div>\n"; # class="patchset"
4210 }
4211
4212 # . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
4213
4214 # fills project list info (age, description, owner, forks) for each
4215 # project in the list, removing invalid projects from returned list
4216 # NOTE: modifies $projlist, but does not remove entries from it
4217 sub fill_project_list_info {
4218         my ($projlist, $check_forks, $show_ctags) = @_;
4219         my @projects;
4220
4221  PROJECT:
4222         foreach my $pr (@$projlist) {
4223                 my (@activity) = git_get_last_activity($pr->{'path'});
4224                 unless (@activity) {
4225                         next PROJECT;
4226                 }
4227                 ($pr->{'age'}, $pr->{'age_string'}) = @activity;
4228                 if (!defined $pr->{'descr'}) {
4229                         my $descr = git_get_project_description($pr->{'path'}) || "";
4230                         $descr = to_utf8($descr);
4231                         $pr->{'descr_long'} = $descr;
4232                         $pr->{'descr'} = chop_str($descr, $projects_list_description_width, 5);
4233                 }
4234                 if (!defined $pr->{'owner'}) {
4235                         $pr->{'owner'} = git_get_project_owner("$pr->{'path'}") || "";
4236                 }
4237                 if ($check_forks) {
4238                         my $pname = $pr->{'path'};
4239                         if (($pname =~ s/\.git$//) &&
4240                             ($pname !~ /\/$/) &&
4241                             (-d "$projectroot/$pname")) {
4242                                 $pr->{'forks'} = "-d $projectroot/$pname";
4243                         } else {
4244                                 $pr->{'forks'} = 0;
4245                         }
4246                 }
4247                 $show_ctags and $pr->{'ctags'} = git_get_project_ctags($pr->{'path'});
4248                 push @projects, $pr;
4249         }
4250
4251         return @projects;
4252 }
4253
4254 # print 'sort by' <th> element, generating 'sort by $name' replay link
4255 # if that order is not selected
4256 sub print_sort_th {
4257         my ($name, $order, $header) = @_;
4258         $header ||= ucfirst($name);
4259
4260         if ($order eq $name) {
4261                 print "<th>$header</th>\n";
4262         } else {
4263                 print "<th>" .
4264                       $cgi->a({-href => href(-replay=>1, order=>$name),
4265                                -class => "header"}, $header) .
4266                       "</th>\n";
4267         }
4268 }
4269
4270 sub git_project_list_ctags {
4271         my ($projects, $action) = @_;
4272         $action ||= 'project_list';
4273
4274         my %ctags;
4275         foreach my $p (@$projects) {
4276                 foreach my $ct (keys %{$p->{'ctags'}}) {
4277                         $ctags{$ct} += $p->{'ctags'}->{$ct};
4278                 }
4279         }
4280         my $cloud = git_populate_project_tagcloud(\%ctags, $action);
4281         print git_show_project_tagcloud($cloud, 64, $action);
4282 }
4283
4284 sub git_project_list_body {
4285         # actually uses global variable $project
4286         my ($projlist, $order, $from, $to, $extra, $no_header, $ctags_action) = @_;
4287
4288         my $check_forks = gitweb_check_feature('forks');
4289         my $show_ctags = gitweb_check_feature('ctags');
4290         my @projects = fill_project_list_info($projlist, $check_forks, $show_ctags);
4291
4292         $order ||= $default_projects_order;
4293         $from = 0 unless defined $from;
4294         $to = $#projects if (!defined $to || $#projects < $to);
4295
4296         my %order_info = (
4297                 project => { key => 'path', type => 'str' },
4298                 descr => { key => 'descr_long', type => 'str' },
4299                 owner => { key => 'owner', type => 'str' },
4300                 age => { key => 'age', type => 'num' }
4301         );
4302         my $oi = $order_info{$order};
4303         if ($oi->{'type'} eq 'str') {
4304                 @projects = sort {$a->{$oi->{'key'}} cmp $b->{$oi->{'key'}}} @projects;
4305         } else {
4306                 @projects = sort {$a->{$oi->{'key'}} <=> $b->{$oi->{'key'}}} @projects;
4307         }
4308
4309         if ($show_ctags) {
4310                 git_project_list_ctags(\@projects, $ctags_action);
4311         }
4312
4313         print "<table class=\"project_list\">\n";
4314         unless ($no_header) {
4315                 print "<tr>\n";
4316                 if ($check_forks) {
4317                         print "<th></th>\n";
4318                 }
4319                 print_sort_th('project', $order, 'Project');
4320                 print_sort_th('descr', $order, 'Description');
4321                 print_sort_th('owner', $order, 'Owner');
4322                 print_sort_th('age', $order, 'Last Change');
4323                 print "<th></th>\n" . # for links
4324                       "</tr>\n";
4325         }
4326         my $alternate = 1;
4327         my $tagfilter = $input_params{'ctag_filter'};
4328         for (my $i = $from; $i <= $to; $i++) {
4329                 my $pr = $projects[$i];
4330
4331                 next if $tagfilter and $show_ctags and not grep { lc $_ eq lc $tagfilter } keys %{$pr->{'ctags'}};
4332                 next if $searchtext and not $pr->{'path'} =~ /$searchtext/
4333                         and not $pr->{'descr_long'} =~ /$searchtext/;
4334                 # Weed out forks or non-matching entries of search
4335                 if ($check_forks) {
4336                         my $forkbase = $project; $forkbase ||= ''; $forkbase =~ s#\.git$#/#;
4337                         $forkbase="^$forkbase" if $forkbase;
4338                         next if not $searchtext and not $tagfilter and $show_ctags
4339                                 and $pr->{'path'} =~ m#$forkbase.*/.*#; # regexp-safe
4340                 }
4341
4342                 if ($alternate) {
4343                         print "<tr class=\"dark\">\n";
4344                 } else {
4345                         print "<tr class=\"light\">\n";
4346                 }
4347                 $alternate ^= 1;
4348                 if ($check_forks) {
4349                         print "<td>";
4350                         if ($pr->{'forks'}) {
4351                                 print "<!-- $pr->{'forks'} -->\n";
4352                                 print $cgi->a({-href => href(project=>$pr->{'path'}, action=>"forks")}, "+");
4353                         }
4354                         print "</td>\n";
4355                 }
4356                 print "<td>" . $cgi->a({-href => href(project=>$pr->{'path'}, action=>"summary"),
4357                                         -class => "list"}, esc_html($pr->{'path'})) . "</td>\n" .
4358                       "<td>" . $cgi->a({-href => href(project=>$pr->{'path'}, action=>"summary"),
4359                                         -class => "list", -title => $pr->{'descr_long'}},
4360                                         esc_html($pr->{'descr'})) . "</td>\n" .
4361                       "<td><i>" . chop_and_escape_str($pr->{'owner'}, 15) . "</i></td>\n";
4362                 print "<td class=\"". age_class($pr->{'age'}) . "\">" .
4363                       (defined $pr->{'age_string'} ? $pr->{'age_string'} : "No commits") . "</td>\n" .
4364                       "<td class=\"link\">" .
4365                       $cgi->a({-href => href(project=>$pr->{'path'}, action=>"summary")}, "summary")   . " | " .
4366                       $cgi->a({-href => href(project=>$pr->{'path'}, action=>"shortlog")}, "shortlog") . " | " .
4367                       $cgi->a({-href => href(project=>$pr->{'path'}, action=>"log")}, "log") . " | " .
4368                       $cgi->a({-href => href(project=>$pr->{'path'}, action=>"tree")}, "tree") .
4369                       ($pr->{'forks'} ? " | " . $cgi->a({-href => href(project=>$pr->{'path'}, action=>"forks")}, "forks") : '') .
4370                       "</td>\n" .
4371                       "</tr>\n";
4372         }
4373         if (defined $extra) {
4374                 print "<tr>\n";
4375                 if ($check_forks) {
4376                         print "<td></td>\n";
4377                 }
4378                 print "<td colspan=\"5\">$extra</td>\n" .
4379                       "</tr>\n";
4380         }
4381         print "</table>\n";
4382 }
4383
4384 sub git_project_search_form {
4385         print $cgi->startform(-method => "get") .
4386               $cgi->hidden({-name=>"a", -value=>"project_list"}) . "\n" .
4387               "<p class=\"projsearch\">Search:\n" .
4388               $cgi->textfield(-name => "s", -value => $searchtext) . "\n" .
4389               "</p>" .
4390               $cgi->end_form() . "\n";
4391 }
4392
4393 sub git_project_list_all {
4394         my $order = $input_params{'order'};
4395         if (defined $order && $order !~ m/none|project|descr|owner|age/) {
4396                 die_error(400, "Unknown order parameter");
4397         }
4398
4399         my @list = git_get_projects_list();
4400         if (!@list) {
4401                 die_error(404, "No projects found");
4402         }
4403
4404         git_project_list_body(\@list, $order);
4405 }
4406
4407 sub git_shortlog_body {
4408         # uses global variable $project
4409         my ($commitlist, $from, $to, $refs, $extra) = @_;
4410
4411         $from = 0 unless defined $from;
4412         $to = $#{$commitlist} if (!defined $to || $#{$commitlist} < $to);
4413
4414         print "<table class=\"shortlog\">\n";
4415         my $alternate = 1;
4416         for (my $i = $from; $i <= $to; $i++) {
4417                 my %co = %{$commitlist->[$i]};
4418                 my $commit = $co{'id'};
4419                 my $ref = format_ref_marker($refs, $commit);
4420                 if ($alternate) {
4421                         print "<tr class=\"dark\">\n";
4422                 } else {
4423                         print "<tr class=\"light\">\n";
4424                 }
4425                 $alternate ^= 1;
4426                 # git_summary() used print "<td><i>$co{'age_string'}</i></td>\n" .
4427                 print "<td title=\"$co{'age_string_age'}\"><i>$co{'age_string_date'}</i></td>\n" .
4428                       format_author_html('td', \%co, 10) . "<td>";
4429                 print format_subject_html($co{'title'}, $co{'title_short'},
4430                                           href(action=>"commit", hash=>$commit), $ref);
4431                 print "</td>\n" .
4432                       "<td class=\"link\">" .
4433                       $cgi->a({-href => href(action=>"commit", hash=>$commit)}, "commit") . " | " .
4434                       $cgi->a({-href => href(action=>"commitdiff", hash=>$commit)}, "commitdiff") . " | " .
4435                       $cgi->a({-href => href(action=>"tree", hash=>$commit, hash_base=>$commit)}, "tree");
4436                 my $snapshot_links = format_snapshot_links($commit);
4437                 if (defined $snapshot_links) {
4438                         print " | " . $snapshot_links;
4439                 }
4440                 print "</td>\n" .
4441                       "</tr>\n";
4442         }
4443         if (defined $extra) {
4444                 print "<tr>\n" .
4445                       "<td colspan=\"4\">$extra</td>\n" .
4446                       "</tr>\n";
4447         }
4448         print "</table>\n";
4449 }
4450
4451 sub git_history_body {
4452         # Warning: assumes constant type (blob or tree) during history
4453         my ($commitlist, $from, $to, $refs, $hash_base, $ftype, $extra) = @_;
4454
4455         $from = 0 unless defined $from;
4456         $to = $#{$commitlist} unless (defined $to && $to <= $#{$commitlist});
4457
4458         print "<table class=\"history\">\n";
4459         my $alternate = 1;
4460         for (my $i = $from; $i <= $to; $i++) {
4461                 my %co = %{$commitlist->[$i]};
4462                 if (!%co) {
4463                         next;
4464                 }
4465                 my $commit = $co{'id'};
4466
4467                 my $ref = format_ref_marker($refs, $commit);
4468
4469                 if ($alternate) {
4470                         print "<tr class=\"dark\">\n";
4471                 } else {
4472                         print "<tr class=\"light\">\n";
4473                 }
4474                 $alternate ^= 1;
4475                 print "<td title=\"$co{'age_string_age'}\"><i>$co{'age_string_date'}</i></td>\n" .
4476         # shortlog:   format_author_html('td', \%co, 10)
4477                       format_author_html('td', \%co, 15, 3) . "<td>";
4478                 # originally git_history used chop_str($co{'title'}, 50)
4479                 print format_subject_html($co{'title'}, $co{'title_short'},
4480                                           href(action=>"commit", hash=>$commit), $ref);
4481                 print "</td>\n" .
4482                       "<td class=\"link\">" .
4483                       $cgi->a({-href => href(action=>$ftype, hash_base=>$commit, file_name=>$file_name)}, $ftype) . " | " .
4484                       $cgi->a({-href => href(action=>"commitdiff", hash=>$commit)}, "commitdiff");
4485
4486                 if ($ftype eq 'blob') {
4487                         my $blob_current = git_get_hash_by_path($hash_base, $file_name);
4488                         my $blob_parent  = git_get_hash_by_path($commit, $file_name);
4489                         if (defined $blob_current && defined $blob_parent &&
4490                                         $blob_current ne $blob_parent) {
4491                                 print " | " .
4492                                         $cgi->a({-href => href(action=>"blobdiff",
4493                                                                hash=>$blob_current, hash_parent=>$blob_parent,
4494                                                                hash_base=>$hash_base, hash_parent_base=>$commit,
4495                                                                file_name=>$file_name)},
4496                                                 "diff to current");
4497                         }
4498                 }
4499                 print "</td>\n" .
4500                       "</tr>\n";
4501         }
4502         if (defined $extra) {
4503                 print "<tr>\n" .
4504                       "<td colspan=\"4\">$extra</td>\n" .
4505                       "</tr>\n";
4506         }
4507         print "</table>\n";
4508 }
4509
4510 sub git_tags_body {
4511         # uses global variable $project
4512         my ($taglist, $from, $to, $extra) = @_;
4513         $from = 0 unless defined $from;
4514         $to = $#{$taglist} if (!defined $to || $#{$taglist} < $to);
4515
4516         print "<table class=\"tags\">\n";
4517         my $alternate = 1;
4518         for (my $i = $from; $i <= $to; $i++) {
4519                 my $entry = $taglist->[$i];
4520                 my %tag = %$entry;
4521                 my $comment = $tag{'subject'};
4522                 my $comment_short;
4523                 if (defined $comment) {
4524                         $comment_short = chop_str($comment, 30, 5);
4525                 }
4526                 if ($alternate) {
4527                         print "<tr class=\"dark\">\n";
4528                 } else {
4529                         print "<tr class=\"light\">\n";
4530                 }
4531                 $alternate ^= 1;
4532                 if (defined $tag{'age'}) {
4533                         print "<td><i>$tag{'age'}</i></td>\n";
4534                 } else {
4535                         print "<td></td>\n";
4536                 }
4537                 print "<td>" .
4538                       $cgi->a({-href => href(action=>$tag{'reftype'}, hash=>$tag{'refid'}),
4539                                -class => "list name"}, esc_html($tag{'name'})) .
4540                       "</td>\n" .
4541                       "<td>";
4542                 if (defined $comment) {
4543                         print format_subject_html($comment, $comment_short,
4544                                                   href(action=>"tag", hash=>$tag{'id'}));
4545                 }
4546                 print "</td>\n" .
4547                       "<td class=\"selflink\">";
4548                 if ($tag{'type'} eq "tag") {
4549                         print $cgi->a({-href => href(action=>"tag", hash=>$tag{'id'})}, "tag");
4550                 } else {
4551                         print "&nbsp;";
4552                 }
4553                 print "</td>\n" .
4554                       "<td class=\"link\">" . " | " .
4555                       $cgi->a({-href => href(action=>$tag{'reftype'}, hash=>$tag{'refid'})}, $tag{'reftype'});
4556                 if ($tag{'reftype'} eq "commit") {
4557                         print " | " . $cgi->a({-href => href(action=>"shortlog", hash=>$tag{'fullname'})}, "shortlog") .
4558                               " | " . $cgi->a({-href => href(action=>"log", hash=>$tag{'fullname'})}, "log");
4559                 } elsif ($tag{'reftype'} eq "blob") {
4560                         print " | " . $cgi->a({-href => href(action=>"blob_plain", hash=>$tag{'refid'})}, "raw");
4561                 }
4562                 print "</td>\n" .
4563                       "</tr>";
4564         }
4565         if (defined $extra) {
4566                 print "<tr>\n" .
4567                       "<td colspan=\"5\">$extra</td>\n" .
4568                       "</tr>\n";
4569         }
4570         print "</table>\n";
4571 }
4572
4573 sub git_heads_body {
4574         # uses global variable $project
4575         my ($headlist, $head, $from, $to, $extra) = @_;
4576         $from = 0 unless defined $from;
4577         $to = $#{$headlist} if (!defined $to || $#{$headlist} < $to);
4578
4579         print "<table class=\"heads\">\n";
4580         my $alternate = 1;
4581         for (my $i = $from; $i <= $to; $i++) {
4582                 my $entry = $headlist->[$i];
4583                 my %ref = %$entry;
4584                 my $curr = $ref{'id'} eq $head;
4585                 if ($alternate) {
4586                         print "<tr class=\"dark\">\n";
4587                 } else {
4588                         print "<tr class=\"light\">\n";
4589                 }
4590                 $alternate ^= 1;
4591                 print "<td><i>$ref{'age'}</i></td>\n" .
4592                       ($curr ? "<td class=\"current_head\">" : "<td>") .
4593                       $cgi->a({-href => href(action=>"shortlog", hash=>$ref{'fullname'}),
4594                                -class => "list name"},esc_html($ref{'name'})) .
4595                       "</td>\n" .
4596                       "<td class=\"link\">" .
4597                       $cgi->a({-href => href(action=>"shortlog", hash=>$ref{'fullname'})}, "shortlog") . " | " .
4598                       $cgi->a({-href => href(action=>"log", hash=>$ref{'fullname'})}, "log") . " | " .
4599                       $cgi->a({-href => href(action=>"tree", hash=>$ref{'fullname'}, hash_base=>$ref{'name'})}, "tree") .
4600                       "</td>\n" .
4601                       "</tr>";
4602         }
4603         if (defined $extra) {
4604                 print "<tr>\n" .
4605                       "<td colspan=\"3\">$extra</td>\n" .
4606                       "</tr>\n";
4607         }
4608         print "</table>\n";
4609 }
4610
4611 sub git_search_grep_body {
4612         my ($commitlist, $from, $to, $extra) = @_;
4613         $from = 0 unless defined $from;
4614         $to = $#{$commitlist} if (!defined $to || $#{$commitlist} < $to);
4615
4616         print "<table class=\"commit_search\">\n";
4617         my $alternate = 1;
4618         for (my $i = $from; $i <= $to; $i++) {
4619                 my %co = %{$commitlist->[$i]};
4620                 if (!%co) {
4621                         next;
4622                 }
4623                 my $commit = $co{'id'};
4624                 if ($alternate) {
4625                         print "<tr class=\"dark\">\n";
4626                 } else {
4627                         print "<tr class=\"light\">\n";
4628                 }
4629                 $alternate ^= 1;
4630                 print "<td title=\"$co{'age_string_age'}\"><i>$co{'age_string_date'}</i></td>\n" .
4631                       format_author_html('td', \%co, 15, 5) .
4632                       "<td>" .
4633                       $cgi->a({-href => href(action=>"commit", hash=>$co{'id'}),
4634                                -class => "list subject"},
4635                               chop_and_escape_str($co{'title'}, 50) . "<br/>");
4636                 my $comment = $co{'comment'};
4637                 foreach my $line (@$comment) {
4638                         if ($line =~ m/^(.*?)($search_regexp)(.*)$/i) {
4639                                 my ($lead, $match, $trail) = ($1, $2, $3);
4640                                 $match = chop_str($match, 70, 5, 'center');
4641                                 my $contextlen = int((80 - length($match))/2);
4642                                 $contextlen = 30 if ($contextlen > 30);
4643                                 $lead  = chop_str($lead,  $contextlen, 10, 'left');
4644                                 $trail = chop_str($trail, $contextlen, 10, 'right');
4645
4646                                 $lead  = esc_html($lead);
4647                                 $match = esc_html($match);
4648                                 $trail = esc_html($trail);
4649
4650                                 print "$lead<span class=\"match\">$match</span>$trail<br />";
4651                         }
4652                 }
4653                 print "</td>\n" .
4654                       "<td class=\"link\">" .
4655                       $cgi->a({-href => href(action=>"commit", hash=>$co{'id'})}, "commit") .
4656                       " | " .
4657                       $cgi->a({-href => href(action=>"commitdiff", hash=>$co{'id'})}, "commitdiff") .
4658                       " | " .
4659                       $cgi->a({-href => href(action=>"tree", hash=>$co{'tree'}, hash_base=>$co{'id'})}, "tree");
4660                 print "</td>\n" .
4661                       "</tr>\n";
4662         }
4663         if (defined $extra) {
4664                 print "<tr>\n" .
4665                       "<td colspan=\"3\">$extra</td>\n" .
4666                       "</tr>\n";
4667         }
4668         print "</table>\n";
4669 }
4670
4671 ## ======================================================================
4672 ## ======================================================================
4673 ## actions
4674
4675 sub git_frontpage {
4676         git_header_html();
4677         if (-f $home_text) {
4678                 print "<div class=\"index_include\">\n";
4679                 insert_file($home_text);
4680                 print "</div>\n";
4681         }
4682         git_project_search_form();
4683         if (not $frontpage_no_project_list) {
4684                 git_project_list_all();
4685         } else {
4686                 my $show_ctags = gitweb_check_feature('ctags');
4687                 if ($frontpage_no_project_list == 1 and $show_ctags) {
4688                         my @list = git_get_projects_list();
4689                         my @projects = fill_project_list_info(\@list, gitweb_check_feature('forks'), $show_ctags);
4690                         git_project_list_ctags(\@projects);
4691                 }
4692                 print "<p class=\"projectlist_link\">" .
4693                         $cgi->a({-href => href(action=>'project_list')}, "Browse all projects") .
4694                         "</p>\n";
4695         }
4696         git_footer_html();
4697 }
4698
4699 sub git_project_list {
4700         git_header_html();
4701         git_project_search_form();
4702         git_project_list_all();
4703         git_footer_html();
4704 }
4705
4706 sub git_forks {
4707         my $order = $input_params{'order'};
4708         if (defined $order && $order !~ m/none|project|descr|owner|age/) {
4709                 die_error(400, "Unknown order parameter");
4710         }
4711
4712         my @list = git_get_projects_list($project);
4713         if (!@list) {
4714                 die_error(404, "No forks found");
4715         }
4716
4717         git_header_html();
4718         git_print_page_nav('','');
4719         git_print_header_div('summary', "$project forks");
4720         git_project_list_body(\@list, $order, undef, undef, undef, undef, 'forks');
4721         git_footer_html();
4722 }
4723
4724 sub git_project_index {
4725         my @projects = git_get_projects_list($project);
4726
4727         print $cgi->header(
4728                 -type => 'text/plain',
4729                 -charset => 'utf-8',
4730                 -content_disposition => 'inline; filename="index.aux"');
4731
4732         foreach my $pr (@projects) {
4733                 if (!exists $pr->{'owner'}) {
4734                         $pr->{'owner'} = git_get_project_owner("$pr->{'path'}");
4735                 }
4736
4737                 my ($path, $owner) = ($pr->{'path'}, $pr->{'owner'});
4738                 # quote as in CGI::Util::encode, but keep the slash, and use '+' for ' '
4739                 $path  =~ s/([^a-zA-Z0-9_.\-\/ ])/sprintf("%%%02X", ord($1))/eg;
4740                 $owner =~ s/([^a-zA-Z0-9_.\-\/ ])/sprintf("%%%02X", ord($1))/eg;
4741                 $path  =~ s/ /\+/g;
4742                 $owner =~ s/ /\+/g;
4743
4744                 print "$path $owner\n";
4745         }
4746 }
4747
4748 sub git_summary {
4749         my $descr = git_get_project_description($project) || "none";
4750         my %co = parse_commit("HEAD");
4751         my %cd = %co ? parse_date($co{'committer_epoch'}, $co{'committer_tz'}) : ();
4752         my $head = $co{'id'};
4753
4754         my $owner = git_get_project_owner($project);
4755
4756         my $refs = git_get_references();
4757         # These get_*_list functions return one more to allow us to see if
4758         # there are more ...
4759         my @taglist  = git_get_tags_list(16);
4760         my @headlist = git_get_heads_list(16);
4761         my @forklist;
4762         my $check_forks = gitweb_check_feature('forks');
4763
4764         if ($check_forks) {
4765                 @forklist = git_get_projects_list($project);
4766         }
4767
4768         git_header_html();
4769         git_print_page_nav('summary','', $head);
4770
4771         print "<div class=\"title\">&nbsp;</div>\n";
4772         print "<table class=\"projects_list\">\n" .
4773               "<tr id=\"metadata_desc\"><td>description</td><td>" . esc_html($descr) . "</td></tr>\n" .
4774               "<tr id=\"metadata_owner\"><td>owner</td><td>" . esc_html($owner) . "</td></tr>\n";
4775         if (defined $cd{'rfc2822'}) {
4776                 print "<tr id=\"metadata_lchange\"><td>last change</td><td>$cd{'rfc2822'}</td></tr>\n";
4777         }
4778
4779         # use per project git URL list in $projectroot/$project/cloneurl
4780         # or make project git URL from git base URL and project name
4781         my $url_tag = "URL";
4782         my @url_list = git_get_project_url_list($project);
4783         @url_list = map { "$_/$project" } @git_base_url_list unless @url_list;
4784         foreach my $git_url (@url_list) {
4785                 next unless $git_url;
4786                 print "<tr class=\"metadata_url\"><td>$url_tag</td><td>$git_url</td></tr>\n";
4787                 $url_tag = "";
4788         }
4789
4790         # Tag cloud
4791         my $show_ctags = gitweb_check_feature('ctags');
4792         if ($show_ctags) {
4793                 my $ctags = git_get_project_ctags($project);
4794                 my $cloud = git_populate_project_tagcloud($ctags, 'project_list');
4795                 print "<tr id=\"metadata_ctags\"><td>Content tags:<br />";
4796                 print "</td>\n<td>" unless %$ctags;
4797                 print "<form action=\"$show_ctags\" method=\"post\"><input type=\"hidden\" name=\"p\" value=\"$project\" />Add: <input type=\"text\" name=\"t\" size=\"8\" /></form>";
4798                 print "</td>\n<td>" if %$ctags;
4799                 print git_show_project_tagcloud($cloud, 48, 'project_list');
4800                 print "</td></tr>";
4801         }
4802
4803         print "</table>\n";
4804
4805         # If XSS prevention is on, we don't include README.html.
4806         # TODO: Allow a readme in some safe format.
4807         if (!$prevent_xss && -s "$projectroot/$project/README.html") {
4808                 print "<div class=\"title\">readme</div>\n" .
4809                       "<div class=\"readme\">\n";
4810                 insert_file("$projectroot/$project/README.html");
4811                 print "\n</div>\n"; # class="readme"
4812         }
4813
4814         # we need to request one more than 16 (0..15) to check if
4815         # those 16 are all
4816         my @commitlist = $head ? parse_commits($head, 17) : ();
4817         if (@commitlist) {
4818                 git_print_header_div('shortlog');
4819                 git_shortlog_body(\@commitlist, 0, 15, $refs,
4820                                   $#commitlist <=  15 ? undef :
4821                                   $cgi->a({-href => href(action=>"shortlog")}, "..."));
4822         }
4823
4824         if (@taglist) {
4825                 git_print_header_div('tags');
4826                 git_tags_body(\@taglist, 0, 15,
4827                               $#taglist <=  15 ? undef :
4828                               $cgi->a({-href => href(action=>"tags")}, "..."));
4829         }
4830
4831         if (@headlist) {
4832                 git_print_header_div('heads');
4833                 git_heads_body(\@headlist, $head, 0, 15,
4834                                $#headlist <= 15 ? undef :
4835                                $cgi->a({-href => href(action=>"heads")}, "..."));
4836         }
4837
4838         if (@forklist) {
4839                 git_print_header_div('forks');
4840                 git_project_list_body(\@forklist, 'age', 0, 15,
4841                                       $#forklist <= 15 ? undef :
4842                                       $cgi->a({-href => href(action=>"forks")}, "..."),
4843                                       'no_header', 'forks');
4844         }
4845
4846         git_footer_html();
4847 }
4848
4849 sub git_tag {
4850         my $head = git_get_head_hash($project);
4851         git_header_html();
4852         git_print_page_nav('','', $head,undef,$head);
4853         my %tag = parse_tag($hash);
4854
4855         if (! %tag) {
4856                 die_error(404, "Unknown tag object");
4857         }
4858
4859         git_print_header_div('commit', esc_html($tag{'name'}), $hash);
4860         print "<div class=\"title_text\">\n" .
4861               "<table class=\"object_header\">\n" .
4862               "<tr>\n" .
4863               "<td>object</td>\n" .
4864               "<td>" . $cgi->a({-class => "list", -href => href(action=>$tag{'type'}, hash=>$tag{'object'})},
4865                                $tag{'object'}) . "</td>\n" .
4866               "<td class=\"link\">" . $cgi->a({-href => href(action=>$tag{'type'}, hash=>$tag{'object'})},
4867                                               $tag{'type'}) . "</td>\n" .
4868               "</tr>\n";
4869         if (defined($tag{'author'})) {
4870                 git_print_authorship_rows(\%tag, 'author');
4871         }
4872         print "</table>\n\n" .
4873               "</div>\n";
4874         print "<div class=\"page_body\">";
4875         my $comment = $tag{'comment'};
4876         foreach my $line (@$comment) {
4877                 chomp $line;
4878                 print esc_html($line, -nbsp=>1) . "<br/>\n";
4879         }
4880         print "</div>\n";
4881         git_footer_html();
4882 }
4883
4884 sub git_blame {
4885         # permissions
4886         gitweb_check_feature('blame')
4887                 or die_error(403, "Blame view not allowed");
4888
4889         # error checking
4890         die_error(400, "No file name given") unless $file_name;
4891         $hash_base ||= git_get_head_hash($project);
4892         die_error(404, "Couldn't find base commit") unless $hash_base;
4893         my %co = parse_commit($hash_base)
4894                 or die_error(404, "Commit not found");
4895         my $ftype = "blob";
4896         if (!defined $hash) {
4897                 $hash = git_get_hash_by_path($hash_base, $file_name, "blob")
4898                         or die_error(404, "Error looking up file");
4899         } else {
4900                 $ftype = git_get_type($hash);
4901                 if ($ftype !~ "blob") {
4902                         die_error(400, "Object is not a blob");
4903                 }
4904         }
4905
4906         # run git-blame --porcelain
4907         open my $fd, "-|", git_cmd(), "blame", '-p',
4908                 $hash_base, '--', $file_name
4909                 or die_error(500, "Open git-blame failed");
4910
4911         # page header
4912         git_header_html();
4913         my $formats_nav =
4914                 $cgi->a({-href => href(action=>"blob", -replay=>1)},
4915                         "blob") .
4916                 " | " .
4917                 $cgi->a({-href => href(action=>"history", -replay=>1)},
4918                         "history") .
4919                 " | " .
4920                 $cgi->a({-href => href(action=>"blame", file_name=>$file_name)},
4921                         "HEAD");
4922         git_print_page_nav('','', $hash_base,$co{'tree'},$hash_base, $formats_nav);
4923         git_print_header_div('commit', esc_html($co{'title'}), $hash_base);
4924         git_print_page_path($file_name, $ftype, $hash_base);
4925
4926         # page body
4927         my @rev_color = qw(light dark);
4928         my $num_colors = scalar(@rev_color);
4929         my $current_color = 0;
4930         my %metainfo = ();
4931
4932         print <<HTML;
4933 <div class="page_body">
4934 <table class="blame">
4935 <tr><th>Commit</th><th>Line</th><th>Data</th></tr>
4936 HTML
4937  LINE:
4938         while (my $line = <$fd>) {
4939                 chomp $line;
4940                 # the header: <SHA-1> <src lineno> <dst lineno> [<lines in group>]
4941                 # no <lines in group> for subsequent lines in group of lines
4942                 my ($full_rev, $orig_lineno, $lineno, $group_size) =
4943                    ($line =~ /^([0-9a-f]{40}) (\d+) (\d+)(?: (\d+))?$/);
4944                 if (!exists $metainfo{$full_rev}) {
4945                         $metainfo{$full_rev} = { 'nprevious' => 0 };
4946                 }
4947                 my $meta = $metainfo{$full_rev};
4948                 my $data;
4949                 while ($data = <$fd>) {
4950                         chomp $data;
4951                         last if ($data =~ s/^\t//); # contents of line
4952                         if ($data =~ /^(\S+)(?: (.*))?$/) {
4953                                 $meta->{$1} = $2 unless exists $meta->{$1};
4954                         }
4955                         if ($data =~ /^previous /) {
4956                                 $meta->{'nprevious'}++;
4957                         }
4958                 }
4959                 my $short_rev = substr($full_rev, 0, 8);
4960                 my $author = $meta->{'author'};
4961                 my %date =
4962                         parse_date($meta->{'author-time'}, $meta->{'author-tz'});
4963                 my $date = $date{'iso-tz'};
4964                 if ($group_size) {
4965                         $current_color = ($current_color + 1) % $num_colors;
4966                 }
4967                 my $tr_class = $rev_color[$current_color];
4968                 $tr_class .= ' boundary' if (exists $meta->{'boundary'});
4969                 $tr_class .= ' no-previous' if ($meta->{'nprevious'} == 0);
4970                 $tr_class .= ' multiple-previous' if ($meta->{'nprevious'} > 1);
4971                 print "<tr id=\"l$lineno\" class=\"$tr_class\">\n";
4972                 if ($group_size) {
4973                         print "<td class=\"sha1\"";
4974                         print " title=\"". esc_html($author) . ", $date\"";
4975                         print " rowspan=\"$group_size\"" if ($group_size > 1);
4976                         print ">";
4977                         print $cgi->a({-href => href(action=>"commit",
4978                                                      hash=>$full_rev,
4979                                                      file_name=>$file_name)},
4980                                       esc_html($short_rev));
4981                         if ($group_size >= 2) {
4982                                 my @author_initials = ($author =~ /\b([[:upper:]])\B/g);
4983                                 if (@author_initials) {
4984                                         print "<br />" .
4985                                               esc_html(join('', @author_initials));
4986                                         #           or join('.', ...)
4987                                 }
4988                         }
4989                         print "</td>\n";
4990                 }
4991                 # 'previous' <sha1 of parent commit> <filename at commit>
4992                 if (exists $meta->{'previous'} &&
4993                     $meta->{'previous'} =~ /^([a-fA-F0-9]{40}) (.*)$/) {
4994                         $meta->{'parent'} = $1;
4995                         $meta->{'file_parent'} = unquote($2);
4996                 }
4997                 my $linenr_commit =
4998                         exists($meta->{'parent'}) ?
4999                         $meta->{'parent'} : $full_rev;
5000                 my $linenr_filename =
5001                         exists($meta->{'file_parent'}) ?
5002                         $meta->{'file_parent'} : unquote($meta->{'filename'});
5003                 my $blamed = href(action => 'blame',
5004                                   file_name => $linenr_filename,
5005                                   hash_base => $linenr_commit);
5006                 print "<td class=\"linenr\">";
5007                 print $cgi->a({ -href => "$blamed#l$orig_lineno",
5008                                 -class => "linenr" },
5009                               esc_html($lineno));
5010                 print "</td>";
5011                 print "<td class=\"pre\">" . esc_html($data) . "</td>\n";
5012                 print "</tr>\n";
5013         }
5014         print "</table>\n";
5015         print "</div>";
5016         close $fd
5017                 or print "Reading blob failed\n";
5018
5019         # page footer
5020         git_footer_html();
5021 }
5022
5023 sub git_tags {
5024         my $head = git_get_head_hash($project);
5025         git_header_html();
5026         git_print_page_nav('','', $head,undef,$head);
5027         git_print_header_div('summary', $project);
5028
5029         my @tagslist = git_get_tags_list();
5030         if (@tagslist) {
5031                 git_tags_body(\@tagslist);
5032         }
5033         git_footer_html();
5034 }
5035
5036 sub git_heads {
5037         my $head = git_get_head_hash($project);
5038         git_header_html();
5039         git_print_page_nav('','', $head,undef,$head);
5040         git_print_header_div('summary', $project);
5041
5042         my @headslist = git_get_heads_list();
5043         if (@headslist) {
5044                 git_heads_body(\@headslist, $head);
5045         }
5046         git_footer_html();
5047 }
5048
5049 sub git_blob_plain {
5050         my $type = shift;
5051         my $expires;
5052
5053         if (!defined $hash) {
5054                 if (defined $file_name) {
5055                         my $base = $hash_base || git_get_head_hash($project);
5056                         $hash = git_get_hash_by_path($base, $file_name, "blob")
5057                                 or die_error(404, "Cannot find file");
5058                 } else {
5059                         die_error(400, "No file name defined");
5060                 }
5061         } elsif ($hash =~ m/^[0-9a-fA-F]{40}$/) {
5062                 # blobs defined by non-textual hash id's can be cached
5063                 $expires = "+1d";
5064         }
5065
5066         open my $fd, "-|", git_cmd(), "cat-file", "blob", $hash
5067                 or die_error(500, "Open git-cat-file blob '$hash' failed");
5068
5069         # content-type (can include charset)
5070         $type = blob_contenttype($fd, $file_name, $type);
5071
5072         # "save as" filename, even when no $file_name is given
5073         my $save_as = "$hash";
5074         if (defined $file_name) {
5075                 $save_as = $file_name;
5076         } elsif ($type =~ m/^text\//) {
5077                 $save_as .= '.txt';
5078         }
5079
5080         # With XSS prevention on, blobs of all types except a few known safe
5081         # ones are served with "Content-Disposition: attachment" to make sure
5082         # they don't run in our security domain.  For certain image types,
5083         # blob view writes an <img> tag referring to blob_plain view, and we
5084         # want to be sure not to break that by serving the image as an
5085         # attachment (though Firefox 3 doesn't seem to care).
5086         my $sandbox = $prevent_xss &&
5087                 $type !~ m!^(?:text/plain|image/(?:gif|png|jpeg))$!;
5088
5089         print $cgi->header(
5090                 -type => $type,
5091                 -expires => $expires,
5092                 -content_disposition =>
5093                         ($sandbox ? 'attachment' : 'inline')
5094                         . '; filename="' . $save_as . '"');
5095         local $/ = undef;
5096         binmode STDOUT, ':raw';
5097         print <$fd>;
5098         binmode STDOUT, ':utf8'; # as set at the beginning of gitweb.cgi
5099         close $fd;
5100 }
5101
5102 sub git_blob {
5103         my $expires;
5104
5105         if (!defined $hash) {
5106                 if (defined $file_name) {
5107                         my $base = $hash_base || git_get_head_hash($project);
5108                         $hash = git_get_hash_by_path($base, $file_name, "blob")
5109                                 or die_error(404, "Cannot find file");
5110                 } else {
5111                         die_error(400, "No file name defined");
5112                 }
5113         } elsif ($hash =~ m/^[0-9a-fA-F]{40}$/) {
5114                 # blobs defined by non-textual hash id's can be cached
5115                 $expires = "+1d";
5116         }
5117
5118         my $have_blame = gitweb_check_feature('blame');
5119         open my $fd, "-|", git_cmd(), "cat-file", "blob", $hash
5120                 or die_error(500, "Couldn't cat $file_name, $hash");
5121         my $mimetype = blob_mimetype($fd, $file_name);
5122         if ($mimetype !~ m!^(?:text/|image/(?:gif|png|jpeg)$)! && -B $fd) {
5123                 close $fd;
5124                 return git_blob_plain($mimetype);
5125         }
5126         # we can have blame only for text/* mimetype
5127         $have_blame &&= ($mimetype =~ m!^text/!);
5128
5129         git_header_html(undef, $expires);
5130         my $formats_nav = '';
5131         if (defined $hash_base && (my %co = parse_commit($hash_base))) {
5132                 if (defined $file_name) {
5133                         if ($have_blame) {
5134                                 $formats_nav .=
5135                                         $cgi->a({-href => href(action=>"blame", -replay=>1)},
5136                                                 "blame") .
5137                                         " | ";
5138                         }
5139                         $formats_nav .=
5140                                 $cgi->a({-href => href(action=>"history", -replay=>1)},
5141                                         "history") .
5142                                 " | " .
5143                                 $cgi->a({-href => href(action=>"blob_plain", -replay=>1)},
5144                                         "raw") .
5145                                 " | " .
5146                                 $cgi->a({-href => href(action=>"blob",
5147                                                        hash_base=>"HEAD", file_name=>$file_name)},
5148                                         "HEAD");
5149                 } else {
5150                         $formats_nav .=
5151                                 $cgi->a({-href => href(action=>"blob_plain", -replay=>1)},
5152                                         "raw");
5153                 }
5154                 git_print_page_nav('','', $hash_base,$co{'tree'},$hash_base, $formats_nav);
5155                 git_print_header_div('commit', esc_html($co{'title'}), $hash_base);
5156         } else {
5157                 print "<div class=\"page_nav\">\n" .
5158                       "<br/><br/></div>\n" .
5159                       "<div class=\"title\">$hash</div>\n";
5160         }
5161         git_print_page_path($file_name, "blob", $hash_base);
5162         print "<div class=\"page_body\">\n";
5163         if ($mimetype =~ m!^image/!) {
5164                 print qq!<img type="$mimetype"!;
5165                 if ($file_name) {
5166                         print qq! alt="$file_name" title="$file_name"!;
5167                 }
5168                 print qq! src="! .
5169                       href(action=>"blob_plain", hash=>$hash,
5170                            hash_base=>$hash_base, file_name=>$file_name) .
5171                       qq!" />\n!;
5172         } else {
5173                 my $nr;
5174                 while (my $line = <$fd>) {
5175                         chomp $line;
5176                         $nr++;
5177                         $line = untabify($line);
5178                         printf "<div class=\"pre\"><a id=\"l%i\" href=\"#l%i\" class=\"linenr\">%4i</a> %s</div>\n",
5179                                $nr, $nr, $nr, esc_html($line, -nbsp=>1);
5180                 }
5181         }
5182         close $fd
5183                 or print "Reading blob failed.\n";
5184         print "</div>";
5185         git_footer_html();
5186 }
5187
5188 sub git_tree {
5189         if (!defined $hash_base) {
5190                 $hash_base = "HEAD";
5191         }
5192         if (!defined $hash) {
5193                 if (defined $file_name) {
5194                         $hash = git_get_hash_by_path($hash_base, $file_name, "tree");
5195                 } else {
5196                         $hash = $hash_base;
5197                 }
5198         }
5199         die_error(404, "No such tree") unless defined($hash);
5200
5201         my $show_sizes = gitweb_check_feature('show-sizes');
5202         my $have_blame = gitweb_check_feature('blame');
5203
5204         my @entries = ();
5205         {
5206                 local $/ = "\0";
5207                 open my $fd, "-|", git_cmd(), "ls-tree", '-z',
5208                         ($show_sizes ? '-l' : ()), @extra_options, $hash
5209                         or die_error(500, "Open git-ls-tree failed");
5210                 @entries = map { chomp; $_ } <$fd>;
5211                 close $fd
5212                         or die_error(404, "Reading tree failed");
5213         }
5214
5215         my $refs = git_get_references();
5216         my $ref = format_ref_marker($refs, $hash_base);
5217         git_header_html();
5218         my $basedir = '';
5219         if (defined $hash_base && (my %co = parse_commit($hash_base))) {
5220                 my @views_nav = ();
5221                 if (defined $file_name) {
5222                         push @views_nav,
5223                                 $cgi->a({-href => href(action=>"history", -replay=>1)},
5224                                         "history"),
5225                                 $cgi->a({-href => href(action=>"tree",
5226                                                        hash_base=>"HEAD", file_name=>$file_name)},
5227                                         "HEAD"),
5228                 }
5229                 my $snapshot_links = format_snapshot_links($hash);
5230                 if (defined $snapshot_links) {
5231                         # FIXME: Should be available when we have no hash base as well.
5232                         push @views_nav, $snapshot_links;
5233                 }
5234                 git_print_page_nav('tree','', $hash_base, undef, undef,
5235                                    join(' | ', @views_nav));
5236                 git_print_header_div('commit', esc_html($co{'title'}) . $ref, $hash_base);
5237         } else {
5238                 undef $hash_base;
5239                 print "<div class=\"page_nav\">\n";
5240                 print "<br/><br/></div>\n";
5241                 print "<div class=\"title\">$hash</div>\n";
5242         }
5243         if (defined $file_name) {
5244                 $basedir = $file_name;
5245                 if ($basedir ne '' && substr($basedir, -1) ne '/') {
5246                         $basedir .= '/';
5247                 }
5248                 git_print_page_path($file_name, 'tree', $hash_base);
5249         }
5250         print "<div class=\"page_body\">\n";
5251         print "<table class=\"tree\">\n";
5252         my $alternate = 1;
5253         # '..' (top directory) link if possible
5254         if (defined $hash_base &&
5255             defined $file_name && $file_name =~ m![^/]+$!) {
5256                 if ($alternate) {
5257                         print "<tr class=\"dark\">\n";
5258                 } else {
5259                         print "<tr class=\"light\">\n";
5260                 }
5261                 $alternate ^= 1;
5262
5263                 my $up = $file_name;
5264                 $up =~ s!/?[^/]+$!!;
5265                 undef $up unless $up;
5266                 # based on git_print_tree_entry
5267                 print '<td class="mode">' . mode_str('040000') . "</td>\n";
5268                 print '<td class="size">&nbsp;</td>'."\n" if $show_sizes;
5269                 print '<td class="list">';
5270                 print $cgi->a({-href => href(action=>"tree",
5271                                              hash_base=>$hash_base,
5272                                              file_name=>$up)},
5273                               "..");
5274                 print "</td>\n";
5275                 print "<td class=\"link\"></td>\n";
5276
5277                 print "</tr>\n";
5278         }
5279         foreach my $line (@entries) {
5280                 my %t = parse_ls_tree_line($line, -z => 1, -l => $show_sizes);
5281
5282                 if ($alternate) {
5283                         print "<tr class=\"dark\">\n";
5284                 } else {
5285                         print "<tr class=\"light\">\n";
5286                 }
5287                 $alternate ^= 1;
5288
5289                 git_print_tree_entry(\%t, $basedir, $hash_base, $have_blame);
5290
5291                 print "</tr>\n";
5292         }
5293         print "</table>\n" .
5294               "</div>";
5295         git_footer_html();
5296 }
5297
5298 sub git_snapshot {
5299         my $format = $input_params{'snapshot_format'};
5300         if (!@snapshot_fmts) {
5301                 die_error(403, "Snapshots not allowed");
5302         }
5303         # default to first supported snapshot format
5304         $format ||= $snapshot_fmts[0];
5305         if ($format !~ m/^[a-z0-9]+$/) {
5306                 die_error(400, "Invalid snapshot format parameter");
5307         } elsif (!exists($known_snapshot_formats{$format})) {
5308                 die_error(400, "Unknown snapshot format");
5309         } elsif ($known_snapshot_formats{$format}{'disabled'}) {
5310                 die_error(403, "Snapshot format not allowed");
5311         } elsif (!grep($_ eq $format, @snapshot_fmts)) {
5312                 die_error(403, "Unsupported snapshot format");
5313         }
5314
5315         if (!defined $hash) {
5316                 $hash = git_get_head_hash($project);
5317         }
5318
5319         my $name = $project;
5320         $name =~ s,([^/])/*\.git$,$1,;
5321         $name = basename($name);
5322         my $filename = to_utf8($name);
5323         $name =~ s/\047/\047\\\047\047/g;
5324         my $cmd;
5325         $filename .= "-$hash$known_snapshot_formats{$format}{'suffix'}";
5326         $cmd = quote_command(
5327                 git_cmd(), 'archive',
5328                 "--format=$known_snapshot_formats{$format}{'format'}",
5329                 "--prefix=$name/", $hash);
5330         if (exists $known_snapshot_formats{$format}{'compressor'}) {
5331                 $cmd .= ' | ' . quote_command(@{$known_snapshot_formats{$format}{'compressor'}});
5332         }
5333
5334         print $cgi->header(
5335                 -type => $known_snapshot_formats{$format}{'type'},
5336                 -content_disposition => 'inline; filename="' . "$filename" . '"',
5337                 -status => '200 OK');
5338
5339         open my $fd, "-|", $cmd
5340                 or die_error(500, "Execute git-archive failed");
5341         binmode STDOUT, ':raw';
5342         print <$fd>;
5343         binmode STDOUT, ':utf8'; # as set at the beginning of gitweb.cgi
5344         close $fd;
5345 }
5346
5347 sub git_log {
5348         my $head = git_get_head_hash($project);
5349         if (!defined $hash) {
5350                 $hash = $head;
5351         }
5352         if (!defined $page) {
5353                 $page = 0;
5354         }
5355         my $refs = git_get_references();
5356
5357         my @commitlist = parse_commits($hash, 101, (100 * $page));
5358
5359         my $paging_nav = format_paging_nav('log', $hash, $head, $page, $#commitlist >= 100);
5360
5361         my ($patch_max) = gitweb_get_feature('patches');
5362         if ($patch_max) {
5363                 if ($patch_max < 0 || @commitlist <= $patch_max) {
5364                         $paging_nav .= " &sdot; " .
5365                                 $cgi->a({-href => href(action=>"patches", -replay=>1)},
5366                                         "patches");
5367                 }
5368         }
5369
5370         git_header_html();
5371         git_print_page_nav('log','', $hash,undef,undef, $paging_nav);
5372
5373         if (!@commitlist) {
5374                 my %co = parse_commit($hash);
5375
5376                 git_print_header_div('summary', $project);
5377                 print "<div class=\"page_body\"> Last change $co{'age_string'}.<br/><br/></div>\n";
5378         }
5379         my $to = ($#commitlist >= 99) ? (99) : ($#commitlist);
5380         for (my $i = 0; $i <= $to; $i++) {
5381                 my %co = %{$commitlist[$i]};
5382                 next if !%co;
5383                 my $commit = $co{'id'};
5384                 my $ref = format_ref_marker($refs, $commit);
5385                 my %ad = parse_date($co{'author_epoch'});
5386                 git_print_header_div('commit',
5387                                "<span class=\"age\">$co{'age_string'}</span>" .
5388                                esc_html($co{'title'}) . $ref,
5389                                $commit);
5390                 print "<div class=\"title_text\">\n" .
5391                       "<div class=\"log_link\">\n" .
5392                       $cgi->a({-href => href(action=>"commit", hash=>$commit)}, "commit") .
5393                       " | " .
5394                       $cgi->a({-href => href(action=>"commitdiff", hash=>$commit)}, "commitdiff") .
5395                       " | " .
5396                       $cgi->a({-href => href(action=>"tree", hash=>$commit, hash_base=>$commit)}, "tree") .
5397                       "<br/>\n" .
5398                       "</div>\n";
5399                       git_print_authorship(\%co, -tag => 'span');
5400                       print "<br/>\n</div>\n";
5401
5402                 print "<div class=\"log_body\">\n";
5403                 git_print_log($co{'comment'}, -final_empty_line=> 1);
5404                 print "</div>\n";
5405         }
5406         if ($#commitlist >= 100) {
5407                 print "<div class=\"page_nav\">\n";
5408                 print $cgi->a({-href => href(-replay=>1, page=>$page+1),
5409                                -accesskey => "n", -title => "Alt-n"}, "next");
5410                 print "</div>\n";
5411         }
5412         git_footer_html();
5413 }
5414
5415 sub git_commit {
5416         $hash ||= $hash_base || "HEAD";
5417         my %co = parse_commit($hash)
5418             or die_error(404, "Unknown commit object");
5419
5420         my $parent  = $co{'parent'};
5421         my $parents = $co{'parents'}; # listref
5422
5423         # we need to prepare $formats_nav before any parameter munging
5424         my $formats_nav;
5425         if (!defined $parent) {
5426                 # --root commitdiff
5427                 $formats_nav .= '(initial)';
5428         } elsif (@$parents == 1) {
5429                 # single parent commit
5430                 $formats_nav .=
5431                         '(parent: ' .
5432                         $cgi->a({-href => href(action=>"commit",
5433                                                hash=>$parent)},
5434                                 esc_html(substr($parent, 0, 7))) .
5435                         ')';
5436         } else {
5437                 # merge commit
5438                 $formats_nav .=
5439                         '(merge: ' .
5440                         join(' ', map {
5441                                 $cgi->a({-href => href(action=>"commit",
5442                                                        hash=>$_)},
5443                                         esc_html(substr($_, 0, 7)));
5444                         } @$parents ) .
5445                         ')';
5446         }
5447         if (gitweb_check_feature('patches') && @$parents <= 1) {
5448                 $formats_nav .= " | " .
5449                         $cgi->a({-href => href(action=>"patch", -replay=>1)},
5450                                 "patch");
5451         }
5452
5453         if (!defined $parent) {
5454                 $parent = "--root";
5455         }
5456         my @difftree;
5457         open my $fd, "-|", git_cmd(), "diff-tree", '-r', "--no-commit-id",
5458                 @diff_opts,
5459                 (@$parents <= 1 ? $parent : '-c'),
5460                 $hash, "--"
5461                 or die_error(500, "Open git-diff-tree failed");
5462         @difftree = map { chomp; $_ } <$fd>;
5463         close $fd or die_error(404, "Reading git-diff-tree failed");
5464
5465         # non-textual hash id's can be cached
5466         my $expires;
5467         if ($hash =~ m/^[0-9a-fA-F]{40}$/) {
5468                 $expires = "+1d";
5469         }
5470         my $refs = git_get_references();
5471         my $ref = format_ref_marker($refs, $co{'id'});
5472
5473         git_header_html(undef, $expires);
5474         git_print_page_nav('commit', '',
5475                            $hash, $co{'tree'}, $hash,
5476                            $formats_nav);
5477
5478         if (defined $co{'parent'}) {
5479                 git_print_header_div('commitdiff', esc_html($co{'title'}) . $ref, $hash);
5480         } else {
5481                 git_print_header_div('tree', esc_html($co{'title'}) . $ref, $co{'tree'}, $hash);
5482         }
5483         print "<div class=\"title_text\">\n" .
5484               "<table class=\"object_header\">\n";
5485         git_print_authorship_rows(\%co);
5486         print "<tr><td>commit</td><td class=\"sha1\">$co{'id'}</td></tr>\n";
5487         print "<tr>" .
5488               "<td>tree</td>" .
5489               "<td class=\"sha1\">" .
5490               $cgi->a({-href => href(action=>"tree", hash=>$co{'tree'}, hash_base=>$hash),
5491                        class => "list"}, $co{'tree'}) .
5492               "</td>" .
5493               "<td class=\"link\">" .
5494               $cgi->a({-href => href(action=>"tree", hash=>$co{'tree'}, hash_base=>$hash)},
5495                       "tree");
5496         my $snapshot_links = format_snapshot_links($hash);
5497         if (defined $snapshot_links) {
5498                 print " | " . $snapshot_links;
5499         }
5500         print "</td>" .
5501               "</tr>\n";
5502
5503         foreach my $par (@$parents) {
5504                 print "<tr>" .
5505                       "<td>parent</td>" .
5506                       "<td class=\"sha1\">" .
5507                       $cgi->a({-href => href(action=>"commit", hash=>$par),
5508                                class => "list"}, $par) .
5509                       "</td>" .
5510                       "<td class=\"link\">" .
5511                       $cgi->a({-href => href(action=>"commit", hash=>$par)}, "commit") .
5512                       " | " .
5513                       $cgi->a({-href => href(action=>"commitdiff", hash=>$hash, hash_parent=>$par)}, "diff") .
5514                       "</td>" .
5515                       "</tr>\n";
5516         }
5517         print "</table>".
5518               "</div>\n";
5519
5520         print "<div class=\"page_body\">\n";
5521         git_print_log($co{'comment'});
5522         print "</div>\n";
5523
5524         git_difftree_body(\@difftree, $hash, @$parents);
5525
5526         git_footer_html();
5527 }
5528
5529 sub git_object {
5530         # object is defined by:
5531         # - hash or hash_base alone
5532         # - hash_base and file_name
5533         my $type;
5534
5535         # - hash or hash_base alone
5536         if ($hash || ($hash_base && !defined $file_name)) {
5537                 my $object_id = $hash || $hash_base;
5538
5539                 open my $fd, "-|", quote_command(
5540                         git_cmd(), 'cat-file', '-t', $object_id) . ' 2> /dev/null'
5541                         or die_error(404, "Object does not exist");
5542                 $type = <$fd>;
5543                 chomp $type;
5544                 close $fd
5545                         or die_error(404, "Object does not exist");
5546
5547         # - hash_base and file_name
5548         } elsif ($hash_base && defined $file_name) {
5549                 $file_name =~ s,/+$,,;
5550
5551                 system(git_cmd(), "cat-file", '-e', $hash_base) == 0
5552                         or die_error(404, "Base object does not exist");
5553
5554                 # here errors should not hapen
5555                 open my $fd, "-|", git_cmd(), "ls-tree", $hash_base, "--", $file_name
5556                         or die_error(500, "Open git-ls-tree failed");
5557                 my $line = <$fd>;
5558                 close $fd;
5559
5560                 #'100644 blob 0fa3f3a66fb6a137f6ec2c19351ed4d807070ffa  panic.c'
5561                 unless ($line && $line =~ m/^([0-9]+) (.+) ([0-9a-fA-F]{40})\t/) {
5562                         die_error(404, "File or directory for given base does not exist");
5563                 }
5564                 $type = $2;
5565                 $hash = $3;
5566         } else {
5567                 die_error(400, "Not enough information to find object");
5568         }
5569
5570         print $cgi->redirect(-uri => href(action=>$type, -full=>1,
5571                                           hash=>$hash, hash_base=>$hash_base,
5572                                           file_name=>$file_name),
5573                              -status => '302 Found');
5574 }
5575
5576 sub git_blobdiff {
5577         my $format = shift || 'html';
5578
5579         my $fd;
5580         my @difftree;
5581         my %diffinfo;
5582         my $expires;
5583
5584         # preparing $fd and %diffinfo for git_patchset_body
5585         # new style URI
5586         if (defined $hash_base && defined $hash_parent_base) {
5587                 if (defined $file_name) {
5588                         # read raw output
5589                         open $fd, "-|", git_cmd(), "diff-tree", '-r', @diff_opts,
5590                                 $hash_parent_base, $hash_base,
5591                                 "--", (defined $file_parent ? $file_parent : ()), $file_name
5592                                 or die_error(500, "Open git-diff-tree failed");
5593                         @difftree = map { chomp; $_ } <$fd>;
5594                         close $fd
5595                                 or die_error(404, "Reading git-diff-tree failed");
5596                         @difftree
5597                                 or die_error(404, "Blob diff not found");
5598
5599                 } elsif (defined $hash &&
5600                          $hash =~ /[0-9a-fA-F]{40}/) {
5601                         # try to find filename from $hash
5602
5603                         # read filtered raw output
5604                         open $fd, "-|", git_cmd(), "diff-tree", '-r', @diff_opts,
5605                                 $hash_parent_base, $hash_base, "--"
5606                                 or die_error(500, "Open git-diff-tree failed");
5607                         @difftree =
5608                                 # ':100644 100644 03b21826... 3b93d5e7... M     ls-files.c'
5609                                 # $hash == to_id
5610                                 grep { /^:[0-7]{6} [0-7]{6} [0-9a-fA-F]{40} $hash/ }
5611                                 map { chomp; $_ } <$fd>;
5612                         close $fd
5613                                 or die_error(404, "Reading git-diff-tree failed");
5614                         @difftree
5615                                 or die_error(404, "Blob diff not found");
5616
5617                 } else {
5618                         die_error(400, "Missing one of the blob diff parameters");
5619                 }
5620
5621                 if (@difftree > 1) {
5622                         die_error(400, "Ambiguous blob diff specification");
5623                 }
5624
5625                 %diffinfo = parse_difftree_raw_line($difftree[0]);
5626                 $file_parent ||= $diffinfo{'from_file'} || $file_name;
5627                 $file_name   ||= $diffinfo{'to_file'};
5628
5629                 $hash_parent ||= $diffinfo{'from_id'};
5630                 $hash        ||= $diffinfo{'to_id'};
5631
5632                 # non-textual hash id's can be cached
5633                 if ($hash_base =~ m/^[0-9a-fA-F]{40}$/ &&
5634                     $hash_parent_base =~ m/^[0-9a-fA-F]{40}$/) {
5635                         $expires = '+1d';
5636                 }
5637
5638                 # open patch output
5639                 open $fd, "-|", git_cmd(), "diff-tree", '-r', @diff_opts,
5640                         '-p', ($format eq 'html' ? "--full-index" : ()),
5641                         $hash_parent_base, $hash_base,
5642                         "--", (defined $file_parent ? $file_parent : ()), $file_name
5643                         or die_error(500, "Open git-diff-tree failed");
5644         }
5645
5646         # old/legacy style URI -- not generated anymore since 1.4.3.
5647         if (!%diffinfo) {
5648                 die_error('404 Not Found', "Missing one of the blob diff parameters")
5649         }
5650
5651         # header
5652         if ($format eq 'html') {
5653                 my $formats_nav =
5654                         $cgi->a({-href => href(action=>"blobdiff_plain", -replay=>1)},
5655                                 "raw");
5656                 git_header_html(undef, $expires);
5657                 if (defined $hash_base && (my %co = parse_commit($hash_base))) {
5658                         git_print_page_nav('','', $hash_base,$co{'tree'},$hash_base, $formats_nav);
5659                         git_print_header_div('commit', esc_html($co{'title'}), $hash_base);
5660                 } else {
5661                         print "<div class=\"page_nav\"><br/>$formats_nav<br/></div>\n";
5662                         print "<div class=\"title\">$hash vs $hash_parent</div>\n";
5663                 }
5664                 if (defined $file_name) {
5665                         git_print_page_path($file_name, "blob", $hash_base);
5666                 } else {
5667                         print "<div class=\"page_path\"></div>\n";
5668                 }
5669
5670         } elsif ($format eq 'plain') {
5671                 print $cgi->header(
5672                         -type => 'text/plain',
5673                         -charset => 'utf-8',
5674                         -expires => $expires,
5675                         -content_disposition => 'inline; filename="' . "$file_name" . '.patch"');
5676
5677                 print "X-Git-Url: " . $cgi->self_url() . "\n\n";
5678
5679         } else {
5680                 die_error(400, "Unknown blobdiff format");
5681         }
5682
5683         # patch
5684         if ($format eq 'html') {
5685                 print "<div class=\"page_body\">\n";
5686
5687                 git_patchset_body($fd, [ \%diffinfo ], $hash_base, $hash_parent_base);
5688                 close $fd;
5689
5690                 print "</div>\n"; # class="page_body"
5691                 git_footer_html();
5692
5693         } else {
5694                 while (my $line = <$fd>) {
5695                         $line =~ s!a/($hash|$hash_parent)!'a/'.esc_path($diffinfo{'from_file'})!eg;
5696                         $line =~ s!b/($hash|$hash_parent)!'b/'.esc_path($diffinfo{'to_file'})!eg;
5697
5698                         print $line;
5699
5700                         last if $line =~ m!^\+\+\+!;
5701                 }
5702                 local $/ = undef;
5703                 print <$fd>;
5704                 close $fd;
5705         }
5706 }
5707
5708 sub git_blobdiff_plain {
5709         git_blobdiff('plain');
5710 }
5711
5712 sub git_commitdiff {
5713         my %params = @_;
5714         my $format = $params{-format} || 'html';
5715
5716         my ($patch_max) = gitweb_get_feature('patches');
5717         if ($format eq 'patch') {
5718                 die_error(403, "Patch view not allowed") unless $patch_max;
5719         }
5720
5721         $hash ||= $hash_base || "HEAD";
5722         my %co = parse_commit($hash)
5723             or die_error(404, "Unknown commit object");
5724
5725         # choose format for commitdiff for merge
5726         if (! defined $hash_parent && @{$co{'parents'}} > 1) {
5727                 $hash_parent = '--cc';
5728         }
5729         # we need to prepare $formats_nav before almost any parameter munging
5730         my $formats_nav;
5731         if ($format eq 'html') {
5732                 $formats_nav =
5733                         $cgi->a({-href => href(action=>"commitdiff_plain", -replay=>1)},
5734                                 "raw");
5735                 if ($patch_max && @{$co{'parents'}} <= 1) {
5736                         $formats_nav .= " | " .
5737                                 $cgi->a({-href => href(action=>"patch", -replay=>1)},
5738                                         "patch");
5739                 }
5740
5741                 if (defined $hash_parent &&
5742                     $hash_parent ne '-c' && $hash_parent ne '--cc') {
5743                         # commitdiff with two commits given
5744                         my $hash_parent_short = $hash_parent;
5745                         if ($hash_parent =~ m/^[0-9a-fA-F]{40}$/) {
5746                                 $hash_parent_short = substr($hash_parent, 0, 7);
5747                         }
5748                         $formats_nav .=
5749                                 ' (from';
5750                         for (my $i = 0; $i < @{$co{'parents'}}; $i++) {
5751                                 if ($co{'parents'}[$i] eq $hash_parent) {
5752                                         $formats_nav .= ' parent ' . ($i+1);
5753                                         last;
5754                                 }
5755                         }
5756                         $formats_nav .= ': ' .
5757                                 $cgi->a({-href => href(action=>"commitdiff",
5758                                                        hash=>$hash_parent)},
5759                                         esc_html($hash_parent_short)) .
5760                                 ')';
5761                 } elsif (!$co{'parent'}) {
5762                         # --root commitdiff
5763                         $formats_nav .= ' (initial)';
5764                 } elsif (scalar @{$co{'parents'}} == 1) {
5765                         # single parent commit
5766                         $formats_nav .=
5767                                 ' (parent: ' .
5768                                 $cgi->a({-href => href(action=>"commitdiff",
5769                                                        hash=>$co{'parent'})},
5770                                         esc_html(substr($co{'parent'}, 0, 7))) .
5771                                 ')';
5772                 } else {
5773                         # merge commit
5774                         if ($hash_parent eq '--cc') {
5775                                 $formats_nav .= ' | ' .
5776                                         $cgi->a({-href => href(action=>"commitdiff",
5777                                                                hash=>$hash, hash_parent=>'-c')},
5778                                                 'combined');
5779                         } else { # $hash_parent eq '-c'
5780                                 $formats_nav .= ' | ' .
5781                                         $cgi->a({-href => href(action=>"commitdiff",
5782                                                                hash=>$hash, hash_parent=>'--cc')},
5783                                                 'compact');
5784                         }
5785                         $formats_nav .=
5786                                 ' (merge: ' .
5787                                 join(' ', map {
5788                                         $cgi->a({-href => href(action=>"commitdiff",
5789                                                                hash=>$_)},
5790                                                 esc_html(substr($_, 0, 7)));
5791                                 } @{$co{'parents'}} ) .
5792                                 ')';
5793                 }
5794         }
5795
5796         my $hash_parent_param = $hash_parent;
5797         if (!defined $hash_parent_param) {
5798                 # --cc for multiple parents, --root for parentless
5799                 $hash_parent_param =
5800                         @{$co{'parents'}} > 1 ? '--cc' : $co{'parent'} || '--root';
5801         }
5802
5803         # read commitdiff
5804         my $fd;
5805         my @difftree;
5806         if ($format eq 'html') {
5807                 open $fd, "-|", git_cmd(), "diff-tree", '-r', @diff_opts,
5808                         "--no-commit-id", "--patch-with-raw", "--full-index",
5809                         $hash_parent_param, $hash, "--"
5810                         or die_error(500, "Open git-diff-tree failed");
5811
5812                 while (my $line = <$fd>) {
5813                         chomp $line;
5814                         # empty line ends raw part of diff-tree output
5815                         last unless $line;
5816                         push @difftree, scalar parse_difftree_raw_line($line);
5817                 }
5818
5819         } elsif ($format eq 'plain') {
5820                 open $fd, "-|", git_cmd(), "diff-tree", '-r', @diff_opts,
5821                         '-p', $hash_parent_param, $hash, "--"
5822                         or die_error(500, "Open git-diff-tree failed");
5823         } elsif ($format eq 'patch') {
5824                 # For commit ranges, we limit the output to the number of
5825                 # patches specified in the 'patches' feature.
5826                 # For single commits, we limit the output to a single patch,
5827                 # diverging from the git-format-patch default.
5828                 my @commit_spec = ();
5829                 if ($hash_parent) {
5830                         if ($patch_max > 0) {
5831                                 push @commit_spec, "-$patch_max";
5832                         }
5833                         push @commit_spec, '-n', "$hash_parent..$hash";
5834                 } else {
5835                         if ($params{-single}) {
5836                                 push @commit_spec, '-1';
5837                         } else {
5838                                 if ($patch_max > 0) {
5839                                         push @commit_spec, "-$patch_max";
5840                                 }
5841                                 push @commit_spec, "-n";
5842                         }
5843                         push @commit_spec, '--root', $hash;
5844                 }
5845                 open $fd, "-|", git_cmd(), "format-patch", '--encoding=utf8',
5846                         '--stdout', @commit_spec
5847                         or die_error(500, "Open git-format-patch failed");
5848         } else {
5849                 die_error(400, "Unknown commitdiff format");
5850         }
5851
5852         # non-textual hash id's can be cached
5853         my $expires;
5854         if ($hash =~ m/^[0-9a-fA-F]{40}$/) {
5855                 $expires = "+1d";
5856         }
5857
5858         # write commit message
5859         if ($format eq 'html') {
5860                 my $refs = git_get_references();
5861                 my $ref = format_ref_marker($refs, $co{'id'});
5862
5863                 git_header_html(undef, $expires);
5864                 git_print_page_nav('commitdiff','', $hash,$co{'tree'},$hash, $formats_nav);
5865                 git_print_header_div('commit', esc_html($co{'title'}) . $ref, $hash);
5866                 print "<div class=\"title_text\">\n" .
5867                       "<table class=\"object_header\">\n";
5868                 git_print_authorship_rows(\%co);
5869                 print "</table>".
5870                       "</div>\n";
5871                 print "<div class=\"page_body\">\n";
5872                 if (@{$co{'comment'}} > 1) {
5873                         print "<div class=\"log\">\n";
5874                         git_print_log($co{'comment'}, -final_empty_line=> 1, -remove_title => 1);
5875                         print "</div>\n"; # class="log"
5876                 }
5877
5878         } elsif ($format eq 'plain') {
5879                 my $refs = git_get_references("tags");
5880                 my $tagname = git_get_rev_name_tags($hash);
5881                 my $filename = basename($project) . "-$hash.patch";
5882
5883                 print $cgi->header(
5884                         -type => 'text/plain',
5885                         -charset => 'utf-8',
5886                         -expires => $expires,
5887                         -content_disposition => 'inline; filename="' . "$filename" . '"');
5888                 my %ad = parse_date($co{'author_epoch'}, $co{'author_tz'});
5889                 print "From: " . to_utf8($co{'author'}) . "\n";
5890                 print "Date: $ad{'rfc2822'} ($ad{'tz_local'})\n";
5891                 print "Subject: " . to_utf8($co{'title'}) . "\n";
5892
5893                 print "X-Git-Tag: $tagname\n" if $tagname;
5894                 print "X-Git-Url: " . $cgi->self_url() . "\n\n";
5895
5896                 foreach my $line (@{$co{'comment'}}) {
5897                         print to_utf8($line) . "\n";
5898                 }
5899                 print "---\n\n";
5900         } elsif ($format eq 'patch') {
5901                 my $filename = basename($project) . "-$hash.patch";
5902
5903                 print $cgi->header(
5904                         -type => 'text/plain',
5905                         -charset => 'utf-8',
5906                         -expires => $expires,
5907                         -content_disposition => 'inline; filename="' . "$filename" . '"');
5908         }
5909
5910         # write patch
5911         if ($format eq 'html') {
5912                 my $use_parents = !defined $hash_parent ||
5913                         $hash_parent eq '-c' || $hash_parent eq '--cc';
5914                 git_difftree_body(\@difftree, $hash,
5915                                   $use_parents ? @{$co{'parents'}} : $hash_parent);
5916                 print "<br/>\n";
5917
5918                 git_patchset_body($fd, \@difftree, $hash,
5919                                   $use_parents ? @{$co{'parents'}} : $hash_parent);
5920                 close $fd;
5921                 print "</div>\n"; # class="page_body"
5922                 git_footer_html();
5923
5924         } elsif ($format eq 'plain') {
5925                 local $/ = undef;
5926                 print <$fd>;
5927                 close $fd
5928                         or print "Reading git-diff-tree failed\n";
5929         } elsif ($format eq 'patch') {
5930                 local $/ = undef;
5931                 print <$fd>;
5932                 close $fd
5933                         or print "Reading git-format-patch failed\n";
5934         }
5935 }
5936
5937 sub git_commitdiff_plain {
5938         git_commitdiff(-format => 'plain');
5939 }
5940
5941 # format-patch-style patches
5942 sub git_patch {
5943         git_commitdiff(-format => 'patch', -single => 1);
5944 }
5945
5946 sub git_patches {
5947         git_commitdiff(-format => 'patch');
5948 }
5949
5950 sub git_history {
5951         if (!defined $hash_base) {
5952                 $hash_base = git_get_head_hash($project);
5953         }
5954         if (!defined $page) {
5955                 $page = 0;
5956         }
5957         my $ftype;
5958         my %co = parse_commit($hash_base)
5959             or die_error(404, "Unknown commit object");
5960
5961         my $refs = git_get_references();
5962         my $limit = sprintf("--max-count=%i", (100 * ($page+1)));
5963
5964         my @commitlist = parse_commits($hash_base, 101, (100 * $page),
5965                                        $file_name, "--full-history")
5966             or die_error(404, "No such file or directory on given branch");
5967
5968         if (!defined $hash && defined $file_name) {
5969                 # some commits could have deleted file in question,
5970                 # and not have it in tree, but one of them has to have it
5971                 for (my $i = 0; $i <= @commitlist; $i++) {
5972                         $hash = git_get_hash_by_path($commitlist[$i]{'id'}, $file_name);
5973                         last if defined $hash;
5974                 }
5975         }
5976         if (defined $hash) {
5977                 $ftype = git_get_type($hash);
5978         }
5979         if (!defined $ftype) {
5980                 die_error(500, "Unknown type of object");
5981         }
5982
5983         my $paging_nav = '';
5984         if ($page > 0) {
5985                 $paging_nav .=
5986                         $cgi->a({-href => href(action=>"history", hash=>$hash, hash_base=>$hash_base,
5987                                                file_name=>$file_name)},
5988                                 "first");
5989                 $paging_nav .= " &sdot; " .
5990                         $cgi->a({-href => href(-replay=>1, page=>$page-1),
5991                                  -accesskey => "p", -title => "Alt-p"}, "prev");
5992         } else {
5993                 $paging_nav .= "first";
5994                 $paging_nav .= " &sdot; prev";
5995         }
5996         my $next_link = '';
5997         if ($#commitlist >= 100) {
5998                 $next_link =
5999                         $cgi->a({-href => href(-replay=>1, page=>$page+1),
6000                                  -accesskey => "n", -title => "Alt-n"}, "next");
6001                 $paging_nav .= " &sdot; $next_link";
6002         } else {
6003                 $paging_nav .= " &sdot; next";
6004         }
6005
6006         git_header_html();
6007         git_print_page_nav('history','', $hash_base,$co{'tree'},$hash_base, $paging_nav);
6008         git_print_header_div('commit', esc_html($co{'title'}), $hash_base);
6009         git_print_page_path($file_name, $ftype, $hash_base);
6010
6011         git_history_body(\@commitlist, 0, 99,
6012                          $refs, $hash_base, $ftype, $next_link);
6013
6014         git_footer_html();
6015 }
6016
6017 sub git_search {
6018         gitweb_check_feature('search') or die_error(403, "Search is disabled");
6019         if (!defined $searchtext) {
6020                 die_error(400, "Text field is empty");
6021         }
6022         if (!defined $hash) {
6023                 $hash = git_get_head_hash($project);
6024         }
6025         my %co = parse_commit($hash);
6026         if (!%co) {
6027                 die_error(404, "Unknown commit object");
6028         }
6029         if (!defined $page) {
6030                 $page = 0;
6031         }
6032
6033         $searchtype ||= 'commit';
6034         if ($searchtype eq 'pickaxe') {
6035                 # pickaxe may take all resources of your box and run for several minutes
6036                 # with every query - so decide by yourself how public you make this feature
6037                 gitweb_check_feature('pickaxe')
6038                     or die_error(403, "Pickaxe is disabled");
6039         }
6040         if ($searchtype eq 'grep') {
6041                 gitweb_check_feature('grep')
6042                     or die_error(403, "Grep is disabled");
6043         }
6044
6045         git_header_html();
6046
6047         if ($searchtype eq 'commit' or $searchtype eq 'author' or $searchtype eq 'committer') {
6048                 my $greptype;
6049                 if ($searchtype eq 'commit') {
6050                         $greptype = "--grep=";
6051                 } elsif ($searchtype eq 'author') {
6052                         $greptype = "--author=";
6053                 } elsif ($searchtype eq 'committer') {
6054                         $greptype = "--committer=";
6055                 }
6056                 $greptype .= $searchtext;
6057                 my @commitlist = parse_commits($hash, 101, (100 * $page), undef,
6058                                                $greptype, '--regexp-ignore-case',
6059                                                $search_use_regexp ? '--extended-regexp' : '--fixed-strings');
6060
6061                 my $paging_nav = '';
6062                 if ($page > 0) {
6063                         $paging_nav .=
6064                                 $cgi->a({-href => href(action=>"search", hash=>$hash,
6065                                                        searchtext=>$searchtext,
6066                                                        searchtype=>$searchtype)},
6067                                         "first");
6068                         $paging_nav .= " &sdot; " .
6069                                 $cgi->a({-href => href(-replay=>1, page=>$page-1),
6070                                          -accesskey => "p", -title => "Alt-p"}, "prev");
6071                 } else {
6072                         $paging_nav .= "first";
6073                         $paging_nav .= " &sdot; prev";
6074                 }
6075                 my $next_link = '';
6076                 if ($#commitlist >= 100) {
6077                         $next_link =
6078                                 $cgi->a({-href => href(-replay=>1, page=>$page+1),
6079                                          -accesskey => "n", -title => "Alt-n"}, "next");
6080                         $paging_nav .= " &sdot; $next_link";
6081                 } else {
6082                         $paging_nav .= " &sdot; next";
6083                 }
6084
6085                 if ($#commitlist >= 100) {
6086                 }
6087
6088                 git_print_page_nav('','', $hash,$co{'tree'},$hash, $paging_nav);
6089                 git_print_header_div('commit', esc_html($co{'title'}), $hash);
6090                 git_search_grep_body(\@commitlist, 0, 99, $next_link);
6091         }
6092
6093         if ($searchtype eq 'pickaxe') {
6094                 git_print_page_nav('','', $hash,$co{'tree'},$hash);
6095                 git_print_header_div('commit', esc_html($co{'title'}), $hash);
6096
6097                 print "<table class=\"pickaxe search\">\n";
6098                 my $alternate = 1;
6099                 local $/ = "\n";
6100                 open my $fd, '-|', git_cmd(), '--no-pager', 'log', @diff_opts,
6101                         '--pretty=format:%H', '--no-abbrev', '--raw', "-S$searchtext",
6102                         ($search_use_regexp ? '--pickaxe-regex' : ());
6103                 undef %co;
6104                 my @files;
6105                 while (my $line = <$fd>) {
6106                         chomp $line;
6107                         next unless $line;
6108
6109                         my %set = parse_difftree_raw_line($line);
6110                         if (defined $set{'commit'}) {
6111                                 # finish previous commit
6112                                 if (%co) {
6113                                         print "</td>\n" .
6114                                               "<td class=\"link\">" .
6115                                               $cgi->a({-href => href(action=>"commit", hash=>$co{'id'})}, "commit") .
6116                                               " | " .
6117                                               $cgi->a({-href => href(action=>"tree", hash=>$co{'tree'}, hash_base=>$co{'id'})}, "tree");
6118                                         print "</td>\n" .
6119                                               "</tr>\n";
6120                                 }
6121
6122                                 if ($alternate) {
6123                                         print "<tr class=\"dark\">\n";
6124                                 } else {
6125                                         print "<tr class=\"light\">\n";
6126                                 }
6127                                 $alternate ^= 1;
6128                                 %co = parse_commit($set{'commit'});
6129                                 my $author = chop_and_escape_str($co{'author_name'}, 15, 5);
6130                                 print "<td title=\"$co{'age_string_age'}\"><i>$co{'age_string_date'}</i></td>\n" .
6131                                       "<td><i>$author</i></td>\n" .
6132                                       "<td>" .
6133                                       $cgi->a({-href => href(action=>"commit", hash=>$co{'id'}),
6134                                               -class => "list subject"},
6135                                               chop_and_escape_str($co{'title'}, 50) . "<br/>");
6136                         } elsif (defined $set{'to_id'}) {
6137                                 next if ($set{'to_id'} =~ m/^0{40}$/);
6138
6139                                 print $cgi->a({-href => href(action=>"blob", hash_base=>$co{'id'},
6140                                                              hash=>$set{'to_id'}, file_name=>$set{'to_file'}),
6141                                               -class => "list"},
6142                                               "<span class=\"match\">" . esc_path($set{'file'}) . "</span>") .
6143                                       "<br/>\n";
6144                         }
6145                 }
6146                 close $fd;
6147
6148                 # finish last commit (warning: repetition!)
6149                 if (%co) {
6150                         print "</td>\n" .
6151                               "<td class=\"link\">" .
6152                               $cgi->a({-href => href(action=>"commit", hash=>$co{'id'})}, "commit") .
6153                               " | " .
6154                               $cgi->a({-href => href(action=>"tree", hash=>$co{'tree'}, hash_base=>$co{'id'})}, "tree");
6155                         print "</td>\n" .
6156                               "</tr>\n";
6157                 }
6158
6159                 print "</table>\n";
6160         }
6161
6162         if ($searchtype eq 'grep') {
6163                 git_print_page_nav('','', $hash,$co{'tree'},$hash);
6164                 git_print_header_div('commit', esc_html($co{'title'}), $hash);
6165
6166                 print "<table class=\"grep_search\">\n";
6167                 my $alternate = 1;
6168                 my $matches = 0;
6169                 local $/ = "\n";
6170                 open my $fd, "-|", git_cmd(), 'grep', '-n',
6171                         $search_use_regexp ? ('-E', '-i') : '-F',
6172                         $searchtext, $co{'tree'};
6173                 my $lastfile = '';
6174                 while (my $line = <$fd>) {
6175                         chomp $line;
6176                         my ($file, $lno, $ltext, $binary);
6177                         last if ($matches++ > 1000);
6178                         if ($line =~ /^Binary file (.+) matches$/) {
6179                                 $file = $1;
6180                                 $binary = 1;
6181                         } else {
6182                                 (undef, $file, $lno, $ltext) = split(/:/, $line, 4);
6183                         }
6184                         if ($file ne $lastfile) {
6185                                 $lastfile and print "</td></tr>\n";
6186                                 if ($alternate++) {
6187                                         print "<tr class=\"dark\">\n";
6188                                 } else {
6189                                         print "<tr class=\"light\">\n";
6190                                 }
6191                                 print "<td class=\"list\">".
6192                                         $cgi->a({-href => href(action=>"blob", hash=>$co{'hash'},
6193                                                                file_name=>"$file"),
6194                                                 -class => "list"}, esc_path($file));
6195                                 print "</td><td>\n";
6196                                 $lastfile = $file;
6197                         }
6198                         if ($binary) {
6199                                 print "<div class=\"binary\">Binary file</div>\n";
6200                         } else {
6201                                 $ltext = untabify($ltext);
6202                                 if ($ltext =~ m/^(.*)($search_regexp)(.*)$/i) {
6203                                         $ltext = esc_html($1, -nbsp=>1);
6204                                         $ltext .= '<span class="match">';
6205                                         $ltext .= esc_html($2, -nbsp=>1);
6206                                         $ltext .= '</span>';
6207                                         $ltext .= esc_html($3, -nbsp=>1);
6208                                 } else {
6209                                         $ltext = esc_html($ltext, -nbsp=>1);
6210                                 }
6211                                 print "<div class=\"pre\">" .
6212                                         $cgi->a({-href => href(action=>"blob", hash=>$co{'hash'},
6213                                                                file_name=>"$file").'#l'.$lno,
6214                                                 -class => "linenr"}, sprintf('%4i', $lno))
6215                                         . ' ' .  $ltext . "</div>\n";
6216                         }
6217                 }
6218                 if ($lastfile) {
6219                         print "</td></tr>\n";
6220                         if ($matches > 1000) {
6221                                 print "<div class=\"diff nodifferences\">Too many matches, listing trimmed</div>\n";
6222                         }
6223                 } else {
6224                         print "<div class=\"diff nodifferences\">No matches found</div>\n";
6225                 }
6226                 close $fd;
6227
6228                 print "</table>\n";
6229         }
6230         git_footer_html();
6231 }
6232
6233 sub git_search_help {
6234         git_header_html();
6235         git_print_page_nav('','', $hash,$hash,$hash);
6236         print <<EOT;
6237 <p><strong>Pattern</strong> is by default a normal string that is matched precisely (but without
6238 regard to case, except in the case of pickaxe). However, when you check the <em>re</em> checkbox,
6239 the pattern entered is recognized as the POSIX extended
6240 <a href="http://en.wikipedia.org/wiki/Regular_expression">regular expression</a> (also case
6241 insensitive).</p>
6242 <dl>
6243 <dt><b>commit</b></dt>
6244 <dd>The commit messages and authorship information will be scanned for the given pattern.</dd>
6245 EOT
6246         my $have_grep = gitweb_check_feature('grep');
6247         if ($have_grep) {
6248                 print <<EOT;
6249 <dt><b>grep</b></dt>
6250 <dd>All files in the currently selected tree (HEAD unless you are explicitly browsing
6251     a different one) are searched for the given pattern. On large trees, this search can take
6252 a while and put some strain on the server, so please use it with some consideration. Note that
6253 due to git-grep peculiarity, currently if regexp mode is turned off, the matches are
6254 case-sensitive.</dd>
6255 EOT
6256         }
6257         print <<EOT;
6258 <dt><b>author</b></dt>
6259 <dd>Name and e-mail of the change author and date of birth of the patch will be scanned for the given pattern.</dd>
6260 <dt><b>committer</b></dt>
6261 <dd>Name and e-mail of the committer and date of commit will be scanned for the given pattern.</dd>
6262 EOT
6263         my $have_pickaxe = gitweb_check_feature('pickaxe');
6264         if ($have_pickaxe) {
6265                 print <<EOT;
6266 <dt><b>pickaxe</b></dt>
6267 <dd>All commits that caused the string to appear or disappear from any file (changes that
6268 added, removed or "modified" the string) will be listed. This search can take a while and
6269 takes a lot of strain on the server, so please use it wisely. Note that since you may be
6270 interested even in changes just changing the case as well, this search is case sensitive.</dd>
6271 EOT
6272         }
6273         print "</dl>\n";
6274         git_footer_html();
6275 }
6276
6277 sub git_shortlog {
6278         my $head = git_get_head_hash($project);
6279         if (!defined $hash) {
6280                 $hash = $head;
6281         }
6282         if (!defined $page) {
6283                 $page = 0;
6284         }
6285         my $refs = git_get_references();
6286
6287         my $commit_hash = $hash;
6288         if (defined $hash_parent) {
6289                 $commit_hash = "$hash_parent..$hash";
6290         }
6291         my @commitlist = parse_commits($commit_hash, 101, (100 * $page));
6292
6293         my $paging_nav = format_paging_nav('shortlog', $hash, $head, $page, $#commitlist >= 100);
6294         my $next_link = '';
6295         if ($#commitlist >= 100) {
6296                 $next_link =
6297                         $cgi->a({-href => href(-replay=>1, page=>$page+1),
6298                                  -accesskey => "n", -title => "Alt-n"}, "next");
6299         }
6300         my $patch_max = gitweb_check_feature('patches');
6301         if ($patch_max) {
6302                 if ($patch_max < 0 || @commitlist <= $patch_max) {
6303                         $paging_nav .= " &sdot; " .
6304                                 $cgi->a({-href => href(action=>"patches", -replay=>1)},
6305                                         "patches");
6306                 }
6307         }
6308
6309         git_header_html();
6310         git_print_page_nav('shortlog','', $hash,$hash,$hash, $paging_nav);
6311         git_print_header_div('summary', $project);
6312
6313         git_shortlog_body(\@commitlist, 0, 99, $refs, $next_link);
6314
6315         git_footer_html();
6316 }
6317
6318 ## ......................................................................
6319 ## feeds (RSS, Atom; OPML)
6320
6321 sub git_feed {
6322         my $format = shift || 'atom';
6323         my $have_blame = gitweb_check_feature('blame');
6324
6325         # Atom: http://www.atomenabled.org/developers/syndication/
6326         # RSS:  http://www.notestips.com/80256B3A007F2692/1/NAMO5P9UPQ
6327         if ($format ne 'rss' && $format ne 'atom') {
6328                 die_error(400, "Unknown web feed format");
6329         }
6330
6331         # log/feed of current (HEAD) branch, log of given branch, history of file/directory
6332         my $head = $hash || 'HEAD';
6333         my @commitlist = parse_commits($head, 150, 0, $file_name);
6334
6335         my %latest_commit;
6336         my %latest_date;
6337         my $content_type = "application/$format+xml";
6338         if (defined $cgi->http('HTTP_ACCEPT') &&
6339                  $cgi->Accept('text/xml') > $cgi->Accept($content_type)) {
6340                 # browser (feed reader) prefers text/xml
6341                 $content_type = 'text/xml';
6342         }
6343         if (defined($commitlist[0])) {
6344                 %latest_commit = %{$commitlist[0]};
6345                 my $latest_epoch = $latest_commit{'committer_epoch'};
6346                 %latest_date   = parse_date($latest_epoch);
6347                 my $if_modified = $cgi->http('IF_MODIFIED_SINCE');
6348                 if (defined $if_modified) {
6349                         my $since;
6350                         if (eval { require HTTP::Date; 1; }) {
6351                                 $since = HTTP::Date::str2time($if_modified);
6352                         } elsif (eval { require Time::ParseDate; 1; }) {
6353                                 $since = Time::ParseDate::parsedate($if_modified, GMT => 1);
6354                         }
6355                         if (defined $since && $latest_epoch <= $since) {
6356                                 print $cgi->header(
6357                                         -type => $content_type,
6358                                         -charset => 'utf-8',
6359                                         -last_modified => $latest_date{'rfc2822'},
6360                                         -status => '304 Not Modified');
6361                                 return;
6362                         }
6363                 }
6364                 print $cgi->header(
6365                         -type => $content_type,
6366                         -charset => 'utf-8',
6367                         -last_modified => $latest_date{'rfc2822'});
6368         } else {
6369                 print $cgi->header(
6370                         -type => $content_type,
6371                         -charset => 'utf-8');
6372         }
6373
6374         # Optimization: skip generating the body if client asks only
6375         # for Last-Modified date.
6376         return if ($cgi->request_method() eq 'HEAD');
6377
6378         # header variables
6379         my $title = "$site_name - $project/$action";
6380         my $feed_type = 'log';
6381         if (defined $hash) {
6382                 $title .= " - '$hash'";
6383                 $feed_type = 'branch log';
6384                 if (defined $file_name) {
6385                         $title .= " :: $file_name";
6386                         $feed_type = 'history';
6387                 }
6388         } elsif (defined $file_name) {
6389                 $title .= " - $file_name";
6390                 $feed_type = 'history';
6391         }
6392         $title .= " $feed_type";
6393         my $descr = git_get_project_description($project);
6394         if (defined $descr) {
6395                 $descr = esc_html($descr);
6396         } else {
6397                 $descr = "$project " .
6398                          ($format eq 'rss' ? 'RSS' : 'Atom') .
6399                          " feed";
6400         }
6401         my $owner = git_get_project_owner($project);
6402         $owner = esc_html($owner);
6403
6404         #header
6405         my $alt_url;
6406         if (defined $file_name) {
6407                 $alt_url = href(-full=>1, action=>"history", hash=>$hash, file_name=>$file_name);
6408         } elsif (defined $hash) {
6409                 $alt_url = href(-full=>1, action=>"log", hash=>$hash);
6410         } else {
6411                 $alt_url = href(-full=>1, action=>"summary");
6412         }
6413         print qq!<?xml version="1.0" encoding="utf-8"?>\n!;
6414         if ($format eq 'rss') {
6415                 print <<XML;
6416 <rss version="2.0" xmlns:content="http://purl.org/rss/1.0/modules/content/">
6417 <channel>
6418 XML
6419                 print "<title>$title</title>\n" .
6420                       "<link>$alt_url</link>\n" .
6421                       "<description>$descr</description>\n" .
6422                       "<language>en</language>\n" .
6423                       # project owner is responsible for 'editorial' content
6424                       "<managingEditor>$owner</managingEditor>\n";
6425                 if (defined $logo || defined $favicon) {
6426                         # prefer the logo to the favicon, since RSS
6427                         # doesn't allow both
6428                         my $img = esc_url($logo || $favicon);
6429                         print "<image>\n" .
6430                               "<url>$img</url>\n" .
6431                               "<title>$title</title>\n" .
6432                               "<link>$alt_url</link>\n" .
6433                               "</image>\n";
6434                 }
6435                 if (%latest_date) {
6436                         print "<pubDate>$latest_date{'rfc2822'}</pubDate>\n";
6437                         print "<lastBuildDate>$latest_date{'rfc2822'}</lastBuildDate>\n";
6438                 }
6439                 print "<generator>gitweb v.$version/$git_version</generator>\n";
6440         } elsif ($format eq 'atom') {
6441                 print <<XML;
6442 <feed xmlns="http://www.w3.org/2005/Atom">
6443 XML
6444                 print "<title>$title</title>\n" .
6445                       "<subtitle>$descr</subtitle>\n" .
6446                       '<link rel="alternate" type="text/html" href="' .
6447                       $alt_url . '" />' . "\n" .
6448                       '<link rel="self" type="' . $content_type . '" href="' .
6449                       $cgi->self_url() . '" />' . "\n" .
6450                       "<id>" . href(-full=>1) . "</id>\n" .
6451                       # use project owner for feed author
6452                       "<author><name>$owner</name></author>\n";
6453                 if (defined $favicon) {
6454                         print "<icon>" . esc_url($favicon) . "</icon>\n";
6455                 }
6456                 if (defined $logo_url) {
6457                         # not twice as wide as tall: 72 x 27 pixels
6458                         print "<logo>" . esc_url($logo) . "</logo>\n";
6459                 }
6460                 if (! %latest_date) {
6461                         # dummy date to keep the feed valid until commits trickle in:
6462                         print "<updated>1970-01-01T00:00:00Z</updated>\n";
6463                 } else {
6464                         print "<updated>$latest_date{'iso-8601'}</updated>\n";
6465                 }
6466                 print "<generator version='$version/$git_version'>gitweb</generator>\n";
6467         }
6468
6469         # contents
6470         for (my $i = 0; $i <= $#commitlist; $i++) {
6471                 my %co = %{$commitlist[$i]};
6472                 my $commit = $co{'id'};
6473                 # we read 150, we always show 30 and the ones more recent than 48 hours
6474                 if (($i >= 20) && ((time - $co{'author_epoch'}) > 48*60*60)) {
6475                         last;
6476                 }
6477                 my %cd = parse_date($co{'author_epoch'});
6478
6479                 # get list of changed files
6480                 open my $fd, "-|", git_cmd(), "diff-tree", '-r', @diff_opts,
6481                         $co{'parent'} || "--root",
6482                         $co{'id'}, "--", (defined $file_name ? $file_name : ())
6483                         or next;
6484                 my @difftree = map { chomp; $_ } <$fd>;
6485                 close $fd
6486                         or next;
6487
6488                 # print element (entry, item)
6489                 my $co_url = href(-full=>1, action=>"commitdiff", hash=>$commit);
6490                 if ($format eq 'rss') {
6491                         print "<item>\n" .
6492                               "<title>" . esc_html($co{'title'}) . "</title>\n" .
6493                               "<author>" . esc_html($co{'author'}) . "</author>\n" .
6494                               "<pubDate>$cd{'rfc2822'}</pubDate>\n" .
6495                               "<guid isPermaLink=\"true\">$co_url</guid>\n" .
6496                               "<link>$co_url</link>\n" .
6497                               "<description>" . esc_html($co{'title'}) . "</description>\n" .
6498                               "<content:encoded>" .
6499                               "<![CDATA[\n";
6500                 } elsif ($format eq 'atom') {
6501                         print "<entry>\n" .
6502                               "<title type=\"html\">" . esc_html($co{'title'}) . "</title>\n" .
6503                               "<updated>$cd{'iso-8601'}</updated>\n" .
6504                               "<author>\n" .
6505                               "  <name>" . esc_html($co{'author_name'}) . "</name>\n";
6506                         if ($co{'author_email'}) {
6507                                 print "  <email>" . esc_html($co{'author_email'}) . "</email>\n";
6508                         }
6509                         print "</author>\n" .
6510                               # use committer for contributor
6511                               "<contributor>\n" .
6512                               "  <name>" . esc_html($co{'committer_name'}) . "</name>\n";
6513                         if ($co{'committer_email'}) {
6514                                 print "  <email>" . esc_html($co{'committer_email'}) . "</email>\n";
6515                         }
6516                         print "</contributor>\n" .
6517                               "<published>$cd{'iso-8601'}</published>\n" .
6518                               "<link rel=\"alternate\" type=\"text/html\" href=\"$co_url\" />\n" .
6519                               "<id>$co_url</id>\n" .
6520                               "<content type=\"xhtml\" xml:base=\"" . esc_url($my_url) . "\">\n" .
6521                               "<div xmlns=\"http://www.w3.org/1999/xhtml\">\n";
6522                 }
6523                 my $comment = $co{'comment'};
6524                 print "<pre>\n";
6525                 foreach my $line (@$comment) {
6526                         $line = esc_html($line);
6527                         print "$line\n";
6528                 }
6529                 print "</pre><ul>\n";
6530                 foreach my $difftree_line (@difftree) {
6531                         my %difftree = parse_difftree_raw_line($difftree_line);
6532                         next if !$difftree{'from_id'};
6533
6534                         my $file = $difftree{'file'} || $difftree{'to_file'};
6535
6536                         print "<li>" .
6537                               "[" .
6538                               $cgi->a({-href => href(-full=>1, action=>"blobdiff",
6539                                                      hash=>$difftree{'to_id'}, hash_parent=>$difftree{'from_id'},
6540                                                      hash_base=>$co{'id'}, hash_parent_base=>$co{'parent'},
6541                                                      file_name=>$file, file_parent=>$difftree{'from_file'}),
6542                                       -title => "diff"}, 'D');
6543                         if ($have_blame) {
6544                                 print $cgi->a({-href => href(-full=>1, action=>"blame",
6545                                                              file_name=>$file, hash_base=>$commit),
6546                                               -title => "blame"}, 'B');
6547                         }
6548                         # if this is not a feed of a file history
6549                         if (!defined $file_name || $file_name ne $file) {
6550                                 print $cgi->a({-href => href(-full=>1, action=>"history",
6551                                                              file_name=>$file, hash=>$commit),
6552                                               -title => "history"}, 'H');
6553                         }
6554                         $file = esc_path($file);
6555                         print "] ".
6556                               "$file</li>\n";
6557                 }
6558                 if ($format eq 'rss') {
6559                         print "</ul>]]>\n" .
6560                               "</content:encoded>\n" .
6561                               "</item>\n";
6562                 } elsif ($format eq 'atom') {
6563                         print "</ul>\n</div>\n" .
6564                               "</content>\n" .
6565                               "</entry>\n";
6566                 }
6567         }
6568
6569         # end of feed
6570         if ($format eq 'rss') {
6571                 print "</channel>\n</rss>\n";
6572         } elsif ($format eq 'atom') {
6573                 print "</feed>\n";
6574         }
6575 }
6576
6577 sub git_rss {
6578         git_feed('rss');
6579 }
6580
6581 sub git_atom {
6582         git_feed('atom');
6583 }
6584
6585 sub git_opml {
6586         my @list = git_get_projects_list();
6587
6588         print $cgi->header(
6589                 -type => 'text/xml',
6590                 -charset => 'utf-8',
6591                 -content_disposition => 'inline; filename="opml.xml"');
6592
6593         print <<XML;
6594 <?xml version="1.0" encoding="utf-8"?>
6595 <opml version="1.0">
6596 <head>
6597   <title>$site_name OPML Export</title>
6598 </head>
6599 <body>
6600 <outline text="git RSS feeds">
6601 XML
6602
6603         foreach my $pr (@list) {
6604                 my %proj = %$pr;
6605                 my $head = git_get_head_hash($proj{'path'});
6606                 if (!defined $head) {
6607                         next;
6608                 }
6609                 $git_dir = "$projectroot/$proj{'path'}";
6610                 my %co = parse_commit($head);
6611                 if (!%co) {
6612                         next;
6613                 }
6614
6615                 my $path = esc_html(chop_str($proj{'path'}, 25, 5));
6616                 my $rss  = href('project' => $proj{'path'}, 'action' => 'rss', -full => 1);
6617                 my $html = href('project' => $proj{'path'}, 'action' => 'summary', -full => 1);
6618                 print "<outline type=\"rss\" text=\"$path\" title=\"$path\" xmlUrl=\"$rss\" htmlUrl=\"$html\"/>\n";
6619         }
6620         print <<XML;
6621 </outline>
6622 </body>
6623 </opml>
6624 XML
6625 }