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.or.cz/";
  98 our $logo_label = "git homepage";
  99
 100 # source of projects list
 101 our $projects_list = "++GITWEB_LIST++";
 102
 103 # the width (in characters) of the projects list "Description" column
 104 our $projects_list_description_width = 25;
 105
 106 # default order of projects list
 107 # valid values are none, project, descr, owner, and age
 108 our $default_projects_order = "project";
 109
 110 # show repository only if this file exists
 111 # (only effective if this variable evaluates to true)
 112 our $export_ok = "++GITWEB_EXPORT_OK++";
 113
 114 # show repository only if this subroutine returns true
 115 # when given the path to the project, for example:
 116 #    sub { return -e "$_[0]/git-daemon-export-ok"; }
 117 our $export_auth_hook = undef;
 118
 119 # only allow viewing of repositories also shown on the overview page
 120 our $strict_export = "++GITWEB_STRICT_EXPORT++";
 121
 122 # list of git base URLs used for URL to where fetch project from,
 123 # i.e. full URL is "$git_base_url/$project"
 124 our @git_base_url_list = grep { $_ ne '' } ("++GITWEB_BASE_URL++");
 125
 126 # default blob_plain mimetype and default charset for text/plain blob
 127 our $default_blob_plain_mimetype = 'text/plain';
 128 our $default_text_plain_charset  = undef;
 129
 130 # file to use for guessing MIME types before trying /etc/mime.types
 131 # (relative to the current git repository)
 132 our $mimetypes_file = undef;
 133
 134 # assume this charset if line contains non-UTF-8 characters;
 135 # it should be valid encoding (see Encoding::Supported(3pm) for list),
 136 # for which encoding all byte sequences are valid, for example
 137 # 'iso-8859-1' aka 'latin1' (it is decoded without checking, so it
 138 # could be even 'utf-8' for the old behavior)
 139 our $fallback_encoding = 'latin1';
 140
 141 # rename detection options for git-diff and git-diff-tree
 142 # - default is '-M', with the cost proportional to
 143 #   (number of removed files) * (number of new files).
 144 # - more costly is '-C' (which implies '-M'), with the cost proportional to
 145 #   (number of changed files + number of removed files) * (number of new files)
 146 # - even more costly is '-C', '--find-copies-harder' with cost
 147 #   (number of files in the original tree) * (number of new files)
 148 # - one might want to include '-B' option, e.g. '-B', '-M'
 149 our @diff_opts = ('-M'); # taken from git_commit
 150
 151 # Disables features that would allow repository owners to inject script into
 152 # the gitweb domain.
 153 our $prevent_xss = 0;
 154
 155 # information about snapshot formats that gitweb is capable of serving
 156 our %known_snapshot_formats = (
 157         # name => {
 158         #       'display' => display name,
 159         #       'type' => mime type,
 160         #       'suffix' => filename suffix,
 161         #       'format' => --format for git-archive,
 162         #       'compressor' => [compressor command and arguments]
 163         #                       (array reference, optional)}
 164         #
 165         'tgz' => {
 166                 'display' => 'tar.gz',
 167                 'type' => 'application/x-gzip',
 168                 'suffix' => '.tar.gz',
 169                 'format' => 'tar',
 170                 'compressor' => ['gzip']},
 171
 172         'tbz2' => {
 173                 'display' => 'tar.bz2',
 174                 'type' => 'application/x-bzip2',
 175                 'suffix' => '.tar.bz2',
 176                 'format' => 'tar',
 177                 'compressor' => ['bzip2']},
 178
 179         'zip' => {
 180                 'display' => 'zip',
 181                 'type' => 'application/x-zip',
 182                 'suffix' => '.zip',
 183                 'format' => 'zip'},
 184 );
 185
 186 # Aliases so we understand old gitweb.snapshot values in repository
 187 # configuration.
 188 our %known_snapshot_format_aliases = (
 189         'gzip'  => 'tgz',
 190         'bzip2' => 'tbz2',
 191
 192         # backward compatibility: legacy gitweb config support
 193         'x-gzip' => undef, 'gz' => undef,
 194         'x-bzip2' => undef, 'bz2' => undef,
 195         'x-zip' => undef, '' => undef,
 196 );
 197
 198 # You define site-wide feature defaults here; override them with
 199 # $GITWEB_CONFIG as necessary.
 200 our %feature = (
 201         # feature => {
 202         #       'sub' => feature-sub (subroutine),
 203         #       'override' => allow-override (boolean),
 204         #       'default' => [ default options...] (array reference)}
 205         #
 206         # if feature is overridable (it means that allow-override has true value),
 207         # then feature-sub will be called with default options as parameters;
 208         # return value of feature-sub indicates if to enable specified feature
 209         #
 210         # if there is no 'sub' key (no feature-sub), then feature cannot be
 211         # overriden
 212         #
 213         # use gitweb_get_feature(<feature>) to retrieve the <feature> value
 214         # (an array) or gitweb_check_feature(<feature>) to check if <feature>
 215         # is enabled
 216
 217         # Enable the 'blame' blob view, showing the last commit that modified
 218         # each line in the file. This can be very CPU-intensive.
 219
 220         # To enable system wide have in $GITWEB_CONFIG
 221         # $feature{'blame'}{'default'} = [1];
 222         # To have project specific config enable override in $GITWEB_CONFIG
 223         # $feature{'blame'}{'override'} = 1;
 224         # and in project config gitweb.blame = 0|1;
 225         'blame' => {
 226                 'sub' => sub { feature_bool('blame', @_) },
 227                 'override' => 0,
 228                 'default' => [0]},
 229
 230         # Enable the 'snapshot' link, providing a compressed archive of any
 231         # tree. This can potentially generate high traffic if you have large
 232         # project.
 233
 234         # Value is a list of formats defined in %known_snapshot_formats that
 235         # you wish to offer.
 236         # To disable system wide have in $GITWEB_CONFIG
 237         # $feature{'snapshot'}{'default'} = [];
 238         # To have project specific config enable override in $GITWEB_CONFIG
 239         # $feature{'snapshot'}{'override'} = 1;
 240         # and in project config, a comma-separated list of formats or "none"
 241         # to disable.  Example: gitweb.snapshot = tbz2,zip;
 242         'snapshot' => {
 243                 'sub' => \&feature_snapshot,
 244                 'override' => 0,
 245                 'default' => ['tgz']},
 246
 247         # Enable text search, which will list the commits which match author,
 248         # committer or commit text to a given string.  Enabled by default.
 249         # Project specific override is not supported.
 250         'search' => {
 251                 'override' => 0,
 252                 'default' => [1]},
 253
 254         # Enable grep search, which will list the files in currently selected
 255         # tree containing the given string. Enabled by default. This can be
 256         # potentially CPU-intensive, of course.
 257
 258         # To enable system wide have in $GITWEB_CONFIG
 259         # $feature{'grep'}{'default'} = [1];
 260         # To have project specific config enable override in $GITWEB_CONFIG
 261         # $feature{'grep'}{'override'} = 1;
 262         # and in project config gitweb.grep = 0|1;
 263         'grep' => {
 264                 'sub' => sub { feature_bool('grep', @_) },
 265                 'override' => 0,
 266                 'default' => [1]},
 267
 268         # Enable the pickaxe search, which will list the commits that modified
 269         # a given string in a file. This can be practical and quite faster
 270         # alternative to 'blame', but still potentially CPU-intensive.
 271
 272         # To enable system wide have in $GITWEB_CONFIG
 273         # $feature{'pickaxe'}{'default'} = [1];
 274         # To have project specific config enable override in $GITWEB_CONFIG
 275         # $feature{'pickaxe'}{'override'} = 1;
 276         # and in project config gitweb.pickaxe = 0|1;
 277         'pickaxe' => {
 278                 'sub' => sub { feature_bool('pickaxe', @_) },
 279                 'override' => 0,
 280                 'default' => [1]},
 281
 282         # Make gitweb use an alternative format of the URLs which can be
 283         # more readable and natural-looking: project name is embedded
 284         # directly in the path and the query string contains other
 285         # auxiliary information. All gitweb installations recognize
 286         # URL in either format; this configures in which formats gitweb
 287         # generates links.
 288
 289         # To enable system wide have in $GITWEB_CONFIG
 290         # $feature{'pathinfo'}{'default'} = [1];
 291         # Project specific override is not supported.
 292
 293         # Note that you will need to change the default location of CSS,
 294         # favicon, logo and possibly other files to an absolute URL. Also,
 295         # if gitweb.cgi serves as your indexfile, you will need to force
 296         # $my_uri to contain the script name in your $GITWEB_CONFIG.
 297         'pathinfo' => {
 298                 'override' => 0,
 299                 'default' => [0]},
 300
 301         # Make gitweb consider projects in project root subdirectories
 302         # to be forks of existing projects. Given project $projname.git,
 303         # projects matching $projname/*.git will not be shown in the main
 304         # projects list, instead a '+' mark will be added to $projname
 305         # there and a 'forks' view will be enabled for the project, listing
 306         # all the forks. If project list is taken from a file, forks have
 307         # to be listed after the main project.
 308
 309         # To enable system wide have in $GITWEB_CONFIG
 310         # $feature{'forks'}{'default'} = [1];
 311         # Project specific override is not supported.
 312         'forks' => {
 313                 'override' => 0,
 314                 'default' => [0]},
 315
 316         # Insert custom links to the action bar of all project pages.
 317         # This enables you mainly to link to third-party scripts integrating
 318         # into gitweb; e.g. git-browser for graphical history representation
 319         # or custom web-based repository administration interface.
 320
 321         # The 'default' value consists of a list of triplets in the form
 322         # (label, link, position) where position is the label after which
 323         # to insert the link and link is a format string where %n expands
 324         # to the project name, %f to the project path within the filesystem,
 325         # %h to the current hash (h gitweb parameter) and %b to the current
 326         # hash base (hb gitweb parameter); %% expands to %.
 327
 328         # To enable system wide have in $GITWEB_CONFIG e.g.
 329         # $feature{'actions'}{'default'} = [('graphiclog',
 330         #       '/git-browser/by-commit.html?r=%n', 'summary')];
 331         # Project specific override is not supported.
 332         'actions' => {
 333                 'override' => 0,
 334                 'default' => []},
 335
 336         # Allow gitweb scan project content tags described in ctags/
 337         # of project repository, and display the popular Web 2.0-ish
 338         # "tag cloud" near the project list. Note that this is something
 339         # COMPLETELY different from the normal Git tags.
 340
 341         # gitweb by itself can show existing tags, but it does not handle
 342         # tagging itself; you need an external application for that.
 343         # For an example script, check Girocco's cgi/tagproj.cgi.
 344         # You may want to install the HTML::TagCloud Perl module to get
 345         # a pretty tag cloud instead of just a list of tags.
 346
 347         # To enable system wide have in $GITWEB_CONFIG
 348         # $feature{'ctags'}{'default'} = ['path_to_tag_script'];
 349         # Project specific override is not supported.
 350         'ctags' => {
 351                 'override' => 0,
 352                 'default' => [0]},
 353
 354         # The maximum number of patches in a patchset generated in patch
 355         # view. Set this to 0 or undef to disable patch view, or to a
 356         # negative number to remove any limit.
 357
 358         # To disable system wide have in $GITWEB_CONFIG
 359         # $feature{'patches'}{'default'} = [0];
 360         # To have project specific config enable override in $GITWEB_CONFIG
 361         # $feature{'patches'}{'override'} = 1;
 362         # and in project config gitweb.patches = 0|n;
 363         # where n is the maximum number of patches allowed in a patchset.
 364         'patches' => {
 365                 'sub' => \&feature_patches,
 366                 'override' => 0,
 367                 'default' => [16]},
 368 );
 369
 370 sub gitweb_get_feature {
 371         my ($name) = @_;
 372         return unless exists $feature{$name};
 373         my ($sub, $override, @defaults) = (
 374                 $feature{$name}{'sub'},
 375                 $feature{$name}{'override'},
 376                 @{$feature{$name}{'default'}});
 377         if (!$override) { return @defaults; }
 378         if (!defined $sub) {
 379                 warn "feature $name is not overrideable";
 380                 return @defaults;
 381         }
 382         return $sub->(@defaults);
 383 }
 384
 385 # A wrapper to check if a given feature is enabled.
 386 # With this, you can say
 387 #
 388 #   my $bool_feat = gitweb_check_feature('bool_feat');
 389 #   gitweb_check_feature('bool_feat') or somecode;
 390 #
 391 # instead of
 392 #
 393 #   my ($bool_feat) = gitweb_get_feature('bool_feat');
 394 #   (gitweb_get_feature('bool_feat'))[0] or somecode;
 395 #
 396 sub gitweb_check_feature {
 397         return (gitweb_get_feature(@_))[0];
 398 }
 399
 400
 401 sub feature_bool {
 402         my $key = shift;
 403         my ($val) = git_get_project_config($key, '--bool');
 404
 405         if (!defined $val) {
 406                 return ($_[0]);
 407         } elsif ($val eq 'true') {
 408                 return (1);
 409         } elsif ($val eq 'false') {
 410                 return (0);
 411         }
 412 }
 413
 414 sub feature_snapshot {
 415         my (@fmts) = @_;
 416
 417         my ($val) = git_get_project_config('snapshot');
 418
 419         if ($val) {
 420                 @fmts = ($val eq 'none' ? () : split /\s*[,\s]\s*/, $val);
 421         }
 422
 423         return @fmts;
 424 }
 425
 426 sub feature_patches {
 427         my @val = (git_get_project_config('patches', '--int'));
 428
 429         if (@val) {
 430                 return @val;
 431         }
 432
 433         return ($_[0]);
 434 }
 435
 436 # checking HEAD file with -e is fragile if the repository was
 437 # initialized long time ago (i.e. symlink HEAD) and was pack-ref'ed
 438 # and then pruned.
 439 sub check_head_link {
 440         my ($dir) = @_;
 441         my $headfile = "$dir/HEAD";
 442         return ((-e $headfile) ||
 443                 (-l $headfile && readlink($headfile) =~ /^refs\/heads\//));
 444 }
 445
 446 sub check_export_ok {
 447         my ($dir) = @_;
 448         return (check_head_link($dir) &&
 449                 (!$export_ok || -e "$dir/$export_ok") &&
 450                 (!$export_auth_hook || $export_auth_hook->($dir)));
 451 }
 452
 453 # process alternate names for backward compatibility
 454 # filter out unsupported (unknown) snapshot formats
 455 sub filter_snapshot_fmts {
 456         my @fmts = @_;
 457
 458         @fmts = map {
 459                 exists $known_snapshot_format_aliases{$_} ?
 460                        $known_snapshot_format_aliases{$_} : $_} @fmts;
 461         @fmts = grep {
 462                 exists $known_snapshot_formats{$_} } @fmts;
 463 }
 464
 465 our $GITWEB_CONFIG = $ENV{'GITWEB_CONFIG'} || "++GITWEB_CONFIG++";
 466 if (-e $GITWEB_CONFIG) {
 467         do $GITWEB_CONFIG;
 468 } else {
 469         our $GITWEB_CONFIG_SYSTEM = $ENV{'GITWEB_CONFIG_SYSTEM'} || "++GITWEB_CONFIG_SYSTEM++";
 470         do $GITWEB_CONFIG_SYSTEM if -e $GITWEB_CONFIG_SYSTEM;
 471 }
 472
 473 # version of the core git binary
 474 our $git_version = qx("$GIT" --version) =~ m/git version (.*)$/ ? $1 : "unknown";
 475
 476 $projects_list ||= $projectroot;
 477
 478 # ======================================================================
 479 # input validation and dispatch
 480
 481 # input parameters can be collected from a variety of sources (presently, CGI
 482 # and PATH_INFO), so we define an %input_params hash that collects them all
 483 # together during validation: this allows subsequent uses (e.g. href()) to be
 484 # agnostic of the parameter origin
 485
 486 our %input_params = ();
 487
 488 # input parameters are stored with the long parameter name as key. This will
 489 # also be used in the href subroutine to convert parameters to their CGI
 490 # equivalent, and since the href() usage is the most frequent one, we store
 491 # the name -> CGI key mapping here, instead of the reverse.
 492 #
 493 # XXX: Warning: If you touch this, check the search form for updating,
 494 # too.
 495
 496 our @cgi_param_mapping = (
 497         project => "p",
 498         action => "a",
 499         file_name => "f",
 500         file_parent => "fp",
 501         hash => "h",
 502         hash_parent => "hp",
 503         hash_base => "hb",
 504         hash_parent_base => "hpb",
 505         page => "pg",
 506         order => "o",
 507         searchtext => "s",
 508         searchtype => "st",
 509         snapshot_format => "sf",
 510         extra_options => "opt",
 511         search_use_regexp => "sr",
 512 );
 513 our %cgi_param_mapping = @cgi_param_mapping;
 514
 515 # we will also need to know the possible actions, for validation
 516 our %actions = (
 517         "blame" => \&git_blame,
 518         "blobdiff" => \&git_blobdiff,
 519         "blobdiff_plain" => \&git_blobdiff_plain,
 520         "blob" => \&git_blob,
 521         "blob_plain" => \&git_blob_plain,
 522         "commitdiff" => \&git_commitdiff,
 523         "commitdiff_plain" => \&git_commitdiff_plain,
 524         "commit" => \&git_commit,
 525         "forks" => \&git_forks,
 526         "heads" => \&git_heads,
 527         "history" => \&git_history,
 528         "log" => \&git_log,
 529         "patch" => \&git_patch,
 530         "patches" => \&git_patches,
 531         "rss" => \&git_rss,
 532         "atom" => \&git_atom,
 533         "search" => \&git_search,
 534         "search_help" => \&git_search_help,
 535         "shortlog" => \&git_shortlog,
 536         "summary" => \&git_summary,
 537         "tag" => \&git_tag,
 538         "tags" => \&git_tags,
 539         "tree" => \&git_tree,
 540         "snapshot" => \&git_snapshot,
 541         "object" => \&git_object,
 542         # those below don't need $project
 543         "opml" => \&git_opml,
 544         "project_list" => \&git_project_list,
 545         "project_index" => \&git_project_index,
 546 );
 547
 548 # finally, we have the hash of allowed extra_options for the commands that
 549 # allow them
 550 our %allowed_options = (
 551         "--no-merges" => [ qw(rss atom log shortlog history) ],
 552 );
 553
 554 # fill %input_params with the CGI parameters. All values except for 'opt'
 555 # should be single values, but opt can be an array. We should probably
 556 # build an array of parameters that can be multi-valued, but since for the time
 557 # being it's only this one, we just single it out
 558 while (my ($name, $symbol) = each %cgi_param_mapping) {
 559         if ($symbol eq 'opt') {
 560                 $input_params{$name} = [ $cgi->param($symbol) ];
 561         } else {
 562                 $input_params{$name} = $cgi->param($symbol);
 563         }
 564 }
 565
 566 # now read PATH_INFO and update the parameter list for missing parameters
 567 sub evaluate_path_info {
 568         return if defined $input_params{'project'};
 569         return if !$path_info;
 570         $path_info =~ s,^/+,,;
 571         return if !$path_info;
 572
 573         # find which part of PATH_INFO is project
 574         my $project = $path_info;
 575         $project =~ s,/+$,,;
 576         while ($project && !check_head_link("$projectroot/$project")) {
 577                 $project =~ s,/*[^/]*$,,;
 578         }
 579         return unless $project;
 580         $input_params{'project'} = $project;
 581
 582         # do not change any parameters if an action is given using the query string
 583         return if $input_params{'action'};
 584         $path_info =~ s,^\Q$project\E/*,,;
 585
 586         # next, check if we have an action
 587         my $action = $path_info;
 588         $action =~ s,/.*$,,;
 589         if (exists $actions{$action}) {
 590                 $path_info =~ s,^$action/*,,;
 591                 $input_params{'action'} = $action;
 592         }
 593
 594         # list of actions that want hash_base instead of hash, but can have no
 595         # pathname (f) parameter
 596         my @wants_base = (
 597                 'tree',
 598                 'history',
 599         );
 600
 601         # we want to catch
 602         # [$hash_parent_base[:$file_parent]..]$hash_parent[:$file_name]
 603         my ($parentrefname, $parentpathname, $refname, $pathname) =
 604                 ($path_info =~ /^(?:(.+?)(?::(.+))?\.\.)?(.+?)(?::(.+))?$/);
 605
 606         # first, analyze the 'current' part
 607         if (defined $pathname) {
 608                 # we got "branch:filename" or "branch:dir/"
 609                 # we could use git_get_type(branch:pathname), but:
 610                 # - it needs $git_dir
 611                 # - it does a git() call
 612                 # - the convention of terminating directories with a slash
 613                 #   makes it superfluous
 614                 # - embedding the action in the PATH_INFO would make it even
 615                 #   more superfluous
 616                 $pathname =~ s,^/+,,;
 617                 if (!$pathname || substr($pathname, -1) eq "/") {
 618                         $input_params{'action'} ||= "tree";
 619                         $pathname =~ s,/$,,;
 620                 } else {
 621                         # the default action depends on whether we had parent info
 622                         # or not
 623                         if ($parentrefname) {
 624                                 $input_params{'action'} ||= "blobdiff_plain";
 625                         } else {
 626                                 $input_params{'action'} ||= "blob_plain";
 627                         }
 628                 }
 629                 $input_params{'hash_base'} ||= $refname;
 630                 $input_params{'file_name'} ||= $pathname;
 631         } elsif (defined $refname) {
 632                 # we got "branch". In this case we have to choose if we have to
 633                 # set hash or hash_base.
 634                 #
 635                 # Most of the actions without a pathname only want hash to be
 636                 # set, except for the ones specified in @wants_base that want
 637                 # hash_base instead. It should also be noted that hand-crafted
 638                 # links having 'history' as an action and no pathname or hash
 639                 # set will fail, but that happens regardless of PATH_INFO.
 640                 $input_params{'action'} ||= "shortlog";
 641                 if (grep { $_ eq $input_params{'action'} } @wants_base) {
 642                         $input_params{'hash_base'} ||= $refname;
 643                 } else {
 644                         $input_params{'hash'} ||= $refname;
 645                 }
 646         }
 647
 648         # next, handle the 'parent' part, if present
 649         if (defined $parentrefname) {
 650                 # a missing pathspec defaults to the 'current' filename, allowing e.g.
 651                 # someproject/blobdiff/oldrev..newrev:/filename
 652                 if ($parentpathname) {
 653                         $parentpathname =~ s,^/+,,;
 654                         $parentpathname =~ s,/$,,;
 655                         $input_params{'file_parent'} ||= $parentpathname;
 656                 } else {
 657                         $input_params{'file_parent'} ||= $input_params{'file_name'};
 658                 }
 659                 # we assume that hash_parent_base is wanted if a path was specified,
 660                 # or if the action wants hash_base instead of hash
 661                 if (defined $input_params{'file_parent'} ||
 662                         grep { $_ eq $input_params{'action'} } @wants_base) {
 663                         $input_params{'hash_parent_base'} ||= $parentrefname;
 664                 } else {
 665                         $input_params{'hash_parent'} ||= $parentrefname;
 666                 }
 667         }
 668
 669         # for the snapshot action, we allow URLs in the form
 670         # $project/snapshot/$hash.ext
 671         # where .ext determines the snapshot and gets removed from the
 672         # passed $refname to provide the $hash.
 673         #
 674         # To be able to tell that $refname includes the format extension, we
 675         # require the following two conditions to be satisfied:
 676         # - the hash input parameter MUST have been set from the $refname part
 677         #   of the URL (i.e. they must be equal)
 678         # - the snapshot format MUST NOT have been defined already (e.g. from
 679         #   CGI parameter sf)
 680         # It's also useless to try any matching unless $refname has a dot,
 681         # so we check for that too
 682         if (defined $input_params{'action'} &&
 683                 $input_params{'action'} eq 'snapshot' &&
 684                 defined $refname && index($refname, '.') != -1 &&
 685                 $refname eq $input_params{'hash'} &&
 686                 !defined $input_params{'snapshot_format'}) {
 687                 # We loop over the known snapshot formats, checking for
 688                 # extensions. Allowed extensions are both the defined suffix
 689                 # (which includes the initial dot already) and the snapshot
 690                 # format key itself, with a prepended dot
 691                 while (my ($fmt, $opt) = each %known_snapshot_formats) {
 692                         my $hash = $refname;
 693                         unless ($hash =~ s/(\Q$opt->{'suffix'}\E|\Q.$fmt\E)$//) {
 694                                 next;
 695                         }
 696                         my $sfx = $1;
 697                         # a valid suffix was found, so set the snapshot format
 698                         # and reset the hash parameter
 699                         $input_params{'snapshot_format'} = $fmt;
 700                         $input_params{'hash'} = $hash;
 701                         # we also set the format suffix to the one requested
 702                         # in the URL: this way a request for e.g. .tgz returns
 703                         # a .tgz instead of a .tar.gz
 704                         $known_snapshot_formats{$fmt}{'suffix'} = $sfx;
 705                         last;
 706                 }
 707         }
 708 }
 709 evaluate_path_info();
 710
 711 our $action = $input_params{'action'};
 712 if (defined $action) {
 713         if (!validate_action($action)) {
 714                 die_error(400, "Invalid action parameter");
 715         }
 716 }
 717
 718 # parameters which are pathnames
 719 our $project = $input_params{'project'};
 720 if (defined $project) {
 721         if (!validate_project($project)) {
 722                 undef $project;
 723                 die_error(404, "No such project");
 724         }
 725 }
 726
 727 our $file_name = $input_params{'file_name'};
 728 if (defined $file_name) {
 729         if (!validate_pathname($file_name)) {
 730                 die_error(400, "Invalid file parameter");
 731         }
 732 }
 733
 734 our $file_parent = $input_params{'file_parent'};
 735 if (defined $file_parent) {
 736         if (!validate_pathname($file_parent)) {
 737                 die_error(400, "Invalid file parent parameter");
 738         }
 739 }
 740
 741 # parameters which are refnames
 742 our $hash = $input_params{'hash'};
 743 if (defined $hash) {
 744         if (!validate_refname($hash)) {
 745                 die_error(400, "Invalid hash parameter");
 746         }
 747 }
 748
 749 our $hash_parent = $input_params{'hash_parent'};
 750 if (defined $hash_parent) {
 751         if (!validate_refname($hash_parent)) {
 752                 die_error(400, "Invalid hash parent parameter");
 753         }
 754 }
 755
 756 our $hash_base = $input_params{'hash_base'};
 757 if (defined $hash_base) {
 758         if (!validate_refname($hash_base)) {
 759                 die_error(400, "Invalid hash base parameter");
 760         }
 761 }
 762
 763 our @extra_options = @{$input_params{'extra_options'}};
 764 # @extra_options is always defined, since it can only be (currently) set from
 765 # CGI, and $cgi->param() returns the empty array in array context if the param
 766 # is not set
 767 foreach my $opt (@extra_options) {
 768         if (not exists $allowed_options{$opt}) {
 769                 die_error(400, "Invalid option parameter");
 770         }
 771         if (not grep(/^$action$/, @{$allowed_options{$opt}})) {
 772                 die_error(400, "Invalid option parameter for this action");
 773         }
 774 }
 775
 776 our $hash_parent_base = $input_params{'hash_parent_base'};
 777 if (defined $hash_parent_base) {
 778         if (!validate_refname($hash_parent_base)) {
 779                 die_error(400, "Invalid hash parent base parameter");
 780         }
 781 }
 782
 783 # other parameters
 784 our $page = $input_params{'page'};
 785 if (defined $page) {
 786         if ($page =~ m/[^0-9]/) {
 787                 die_error(400, "Invalid page parameter");
 788         }
 789 }
 790
 791 our $searchtype = $input_params{'searchtype'};
 792 if (defined $searchtype) {
 793         if ($searchtype =~ m/[^a-z]/) {
 794                 die_error(400, "Invalid searchtype parameter");
 795         }
 796 }
 797
 798 our $search_use_regexp = $input_params{'search_use_regexp'};
 799
 800 our $searchtext = $input_params{'searchtext'};
 801 our $search_regexp;
 802 if (defined $searchtext) {
 803         if (length($searchtext) < 2) {
 804                 die_error(403, "At least two characters are required for search parameter");
 805         }
 806         $search_regexp = $search_use_regexp ? $searchtext : quotemeta $searchtext;
 807 }
 808
 809 # path to the current git repository
 810 our $git_dir;
 811 $git_dir = "$projectroot/$project" if $project;
 812
 813 # list of supported snapshot formats
 814 our @snapshot_fmts = gitweb_get_feature('snapshot');
 815 @snapshot_fmts = filter_snapshot_fmts(@snapshot_fmts);
 816
 817 # dispatch
 818 if (!defined $action) {
 819         if (defined $hash) {
 820                 $action = git_get_type($hash);
 821         } elsif (defined $hash_base && defined $file_name) {
 822                 $action = git_get_type("$hash_base:$file_name");
 823         } elsif (defined $project) {
 824                 $action = 'summary';
 825         } else {
 826                 $action = 'project_list';
 827         }
 828 }
 829 if (!defined($actions{$action})) {
 830         die_error(400, "Unknown action");
 831 }
 832 if ($action !~ m/^(?:opml|project_list|project_index)$/ &&
 833     !$project) {
 834         die_error(400, "Project needed");
 835 }
 836 $actions{$action}->();
 837 exit;
 838
 839 ## ======================================================================
 840 ## action links
 841
 842 sub href {
 843         my %params = @_;
 844         # default is to use -absolute url() i.e. $my_uri
 845         my $href = $params{-full} ? $my_url : $my_uri;
 846
 847         $params{'project'} = $project unless exists $params{'project'};
 848
 849         if ($params{-replay}) {
 850                 while (my ($name, $symbol) = each %cgi_param_mapping) {
 851                         if (!exists $params{$name}) {
 852                                 $params{$name} = $input_params{$name};
 853                         }
 854                 }
 855         }
 856
 857         my $use_pathinfo = gitweb_check_feature('pathinfo');
 858         if ($use_pathinfo and defined $params{'project'}) {
 859                 # try to put as many parameters as possible in PATH_INFO:
 860                 #   - project name
 861                 #   - action
 862                 #   - hash_parent or hash_parent_base:/file_parent
 863                 #   - hash or hash_base:/filename
 864                 #   - the snapshot_format as an appropriate suffix
 865
 866                 # When the script is the root DirectoryIndex for the domain,
 867                 # $href here would be something like http://gitweb.example.com/
 868                 # Thus, we strip any trailing / from $href, to spare us double
 869                 # slashes in the final URL
 870                 $href =~ s,/$,,;
 871
 872                 # Then add the project name, if present
 873                 $href .= "/".esc_url($params{'project'});
 874                 delete $params{'project'};
 875
 876                 # since we destructively absorb parameters, we keep this
 877                 # boolean that remembers if we're handling a snapshot
 878                 my $is_snapshot = $params{'action'} eq 'snapshot';
 879
 880                 # Summary just uses the project path URL, any other action is
 881                 # added to the URL
 882                 if (defined $params{'action'}) {
 883                         $href .= "/".esc_url($params{'action'}) unless $params{'action'} eq 'summary';
 884                         delete $params{'action'};
 885                 }
 886
 887                 # Next, we put hash_parent_base:/file_parent..hash_base:/file_name,
 888                 # stripping nonexistent or useless pieces
 889                 $href .= "/" if ($params{'hash_base'} || $params{'hash_parent_base'}
 890                         || $params{'hash_parent'} || $params{'hash'});
 891                 if (defined $params{'hash_base'}) {
 892                         if (defined $params{'hash_parent_base'}) {
 893                                 $href .= esc_url($params{'hash_parent_base'});
 894                                 # skip the file_parent if it's the same as the file_name
 895                                 delete $params{'file_parent'} if $params{'file_parent'} eq $params{'file_name'};
 896                                 if (defined $params{'file_parent'} && $params{'file_parent'} !~ /\.\./) {
 897                                         $href .= ":/".esc_url($params{'file_parent'});
 898                                         delete $params{'file_parent'};
 899                                 }
 900                                 $href .= "..";
 901                                 delete $params{'hash_parent'};
 902                                 delete $params{'hash_parent_base'};
 903                         } elsif (defined $params{'hash_parent'}) {
 904                                 $href .= esc_url($params{'hash_parent'}). "..";
 905                                 delete $params{'hash_parent'};
 906                         }
 907
 908                         $href .= esc_url($params{'hash_base'});
 909                         if (defined $params{'file_name'} && $params{'file_name'} !~ /\.\./) {
 910                                 $href .= ":/".esc_url($params{'file_name'});
 911                                 delete $params{'file_name'};
 912                         }
 913                         delete $params{'hash'};
 914                         delete $params{'hash_base'};
 915                 } elsif (defined $params{'hash'}) {
 916                         $href .= esc_url($params{'hash'});
 917                         delete $params{'hash'};
 918                 }
 919
 920                 # If the action was a snapshot, we can absorb the
 921                 # snapshot_format parameter too
 922                 if ($is_snapshot) {
 923                         my $fmt = $params{'snapshot_format'};
 924                         # snapshot_format should always be defined when href()
 925                         # is called, but just in case some code forgets, we
 926                         # fall back to the default
 927                         $fmt ||= $snapshot_fmts[0];
 928                         $href .= $known_snapshot_formats{$fmt}{'suffix'};
 929                         delete $params{'snapshot_format'};
 930                 }
 931         }
 932
 933         # now encode the parameters explicitly
 934         my @result = ();
 935         for (my $i = 0; $i < @cgi_param_mapping; $i += 2) {
 936                 my ($name, $symbol) = ($cgi_param_mapping[$i], $cgi_param_mapping[$i+1]);
 937                 if (defined $params{$name}) {
 938                         if (ref($params{$name}) eq "ARRAY") {
 939                                 foreach my $par (@{$params{$name}}) {
 940                                         push @result, $symbol . "=" . esc_param($par);
 941                                 }
 942                         } else {
 943                                 push @result, $symbol . "=" . esc_param($params{$name});
 944                         }
 945                 }
 946         }
 947         $href .= "?" . join(';', @result) if scalar @result;
 948
 949         return $href;
 950 }
 951
 952
 953 ## ======================================================================
 954 ## validation, quoting/unquoting and escaping
 955
 956 sub validate_action {
 957         my $input = shift || return undef;
 958         return undef unless exists $actions{$input};
 959         return $input;
 960 }
 961
 962 sub validate_project {
 963         my $input = shift || return undef;
 964         if (!validate_pathname($input) ||
 965                 !(-d "$projectroot/$input") ||
 966                 !check_export_ok("$projectroot/$input") ||
 967                 ($strict_export && !project_in_list($input))) {
 968                 return undef;
 969         } else {
 970                 return $input;
 971         }
 972 }
 973
 974 sub validate_pathname {
 975         my $input = shift || return undef;
 976
 977         # no '.' or '..' as elements of path, i.e. no '.' nor '..'
 978         # at the beginning, at the end, and between slashes.
 979         # also this catches doubled slashes
 980         if ($input =~ m!(^|/)(|\.|\.\.)(/|$)!) {
 981                 return undef;
 982         }
 983         # no null characters
 984         if ($input =~ m!\0!) {
 985                 return undef;
 986         }
 987         return $input;
 988 }
 989
 990 sub validate_refname {
 991         my $input = shift || return undef;
 992
 993         # textual hashes are O.K.
 994         if ($input =~ m/^[0-9a-fA-F]{40}$/) {
 995                 return $input;
 996         }
 997         # it must be correct pathname
 998         $input = validate_pathname($input)
 999                 or return undef;
1000         # restrictions on ref name according to git-check-ref-format
1001         if ($input =~ m!(/\.|\.\.|[\000-\040\177 ~^:?*\[]|/$)!) {
1002                 return undef;
1003         }
1004         return $input;
1005 }
1006
1007 # decode sequences of octets in utf8 into Perl's internal form,
1008 # which is utf-8 with utf8 flag set if needed.  gitweb writes out
1009 # in utf-8 thanks to "binmode STDOUT, ':utf8'" at beginning
1010 sub to_utf8 {
1011         my $str = shift;
1012         if (utf8::valid($str)) {
1013                 utf8::decode($str);
1014                 return $str;
1015         } else {
1016                 return decode($fallback_encoding, $str, Encode::FB_DEFAULT);
1017         }
1018 }
1019
1020 # quote unsafe chars, but keep the slash, even when it's not
1021 # correct, but quoted slashes look too horrible in bookmarks
1022 sub esc_param {
1023         my $str = shift;
1024         $str =~ s/([^A-Za-z0-9\-_.~()\/:@])/sprintf("%%%02X", ord($1))/eg;
1025         $str =~ s/\+/%2B/g;
1026         $str =~ s/ /\+/g;
1027         return $str;
1028 }
1029
1030 # quote unsafe chars in whole URL, so some charactrs cannot be quoted
1031 sub esc_url {
1032         my $str = shift;
1033         $str =~ s/([^A-Za-z0-9\-_.~();\/;?:@&=])/sprintf("%%%02X", ord($1))/eg;
1034         $str =~ s/\+/%2B/g;
1035         $str =~ s/ /\+/g;
1036         return $str;
1037 }
1038
1039 # replace invalid utf8 character with SUBSTITUTION sequence
1040 sub esc_html {
1041         my $str = shift;
1042         my %opts = @_;
1043
1044         $str = to_utf8($str);
1045         $str = $cgi->escapeHTML($str);
1046         if ($opts{'-nbsp'}) {
1047                 $str =~ s/ /&nbsp;/g;
1048         }
1049         $str =~ s|([[:cntrl:]])|(($1 ne "\t") ? quot_cec($1) : $1)|eg;
1050         return $str;
1051 }
1052
1053 # quote control characters and escape filename to HTML
1054 sub esc_path {
1055         my $str = shift;
1056         my %opts = @_;
1057
1058         $str = to_utf8($str);
1059         $str = $cgi->escapeHTML($str);
1060         if ($opts{'-nbsp'}) {
1061                 $str =~ s/ /&nbsp;/g;
1062         }
1063         $str =~ s|([[:cntrl:]])|quot_cec($1)|eg;
1064         return $str;
1065 }
1066
1067 # Make control characters "printable", using character escape codes (CEC)
1068 sub quot_cec {
1069         my $cntrl = shift;
1070         my %opts = @_;
1071         my %es = ( # character escape codes, aka escape sequences
1072                 "\t" => '\t',   # tab            (HT)
1073                 "\n" => '\n',   # line feed      (LF)
1074                 "\r" => '\r',   # carrige return (CR)
1075                 "\f" => '\f',   # form feed      (FF)
1076                 "\b" => '\b',   # backspace      (BS)
1077                 "\a" => '\a',   # alarm (bell)   (BEL)
1078                 "\e" => '\e',   # escape         (ESC)
1079                 "\013" => '\v', # vertical tab   (VT)
1080                 "\000" => '\0', # nul character  (NUL)
1081         );
1082         my $chr = ( (exists $es{$cntrl})
1083                     ? $es{$cntrl}
1084                     : sprintf('\%2x', ord($cntrl)) );
1085         if ($opts{-nohtml}) {
1086                 return $chr;
1087         } else {
1088                 return "<span class=\"cntrl\">$chr</span>";
1089         }
1090 }
1091
1092 # Alternatively use unicode control pictures codepoints,
1093 # Unicode "printable representation" (PR)
1094 sub quot_upr {
1095         my $cntrl = shift;
1096         my %opts = @_;
1097
1098         my $chr = sprintf('&#%04d;', 0x2400+ord($cntrl));
1099         if ($opts{-nohtml}) {
1100                 return $chr;
1101         } else {
1102                 return "<span class=\"cntrl\">$chr</span>";
1103         }
1104 }
1105
1106 # git may return quoted and escaped filenames
1107 sub unquote {
1108         my $str = shift;
1109
1110         sub unq {
1111                 my $seq = shift;
1112                 my %es = ( # character escape codes, aka escape sequences
1113                         't' => "\t",   # tab            (HT, TAB)
1114                         'n' => "\n",   # newline        (NL)
1115                         'r' => "\r",   # return         (CR)
1116                         'f' => "\f",   # form feed      (FF)
1117                         'b' => "\b",   # backspace      (BS)
1118                         'a' => "\a",   # alarm (bell)   (BEL)
1119                         'e' => "\e",   # escape         (ESC)
1120                         'v' => "\013", # vertical tab   (VT)
1121                 );
1122
1123                 if ($seq =~ m/^[0-7]{1,3}$/) {
1124                         # octal char sequence
1125                         return chr(oct($seq));
1126                 } elsif (exists $es{$seq}) {
1127                         # C escape sequence, aka character escape code
1128                         return $es{$seq};
1129                 }
1130                 # quoted ordinary character
1131                 return $seq;
1132         }
1133
1134         if ($str =~ m/^"(.*)"$/) {
1135                 # needs unquoting
1136                 $str = $1;
1137                 $str =~ s/\\([^0-7]|[0-7]{1,3})/unq($1)/eg;
1138         }
1139         return $str;
1140 }
1141
1142 # escape tabs (convert tabs to spaces)
1143 sub untabify {
1144         my $line = shift;
1145
1146         while ((my $pos = index($line, "\t")) != -1) {
1147                 if (my $count = (8 - ($pos % 8))) {
1148                         my $spaces = ' ' x $count;
1149                         $line =~ s/\t/$spaces/;
1150                 }
1151         }
1152
1153         return $line;
1154 }
1155
1156 sub project_in_list {
1157         my $project = shift;
1158         my @list = git_get_projects_list();
1159         return @list && scalar(grep { $_->{'path'} eq $project } @list);
1160 }
1161
1162 ## ----------------------------------------------------------------------
1163 ## HTML aware string manipulation
1164
1165 # Try to chop given string on a word boundary between position
1166 # $len and $len+$add_len. If there is no word boundary there,
1167 # chop at $len+$add_len. Do not chop if chopped part plus ellipsis
1168 # (marking chopped part) would be longer than given string.
1169 sub chop_str {
1170         my $str = shift;
1171         my $len = shift;
1172         my $add_len = shift || 10;
1173         my $where = shift || 'right'; # 'left' | 'center' | 'right'
1174
1175         # Make sure perl knows it is utf8 encoded so we don't
1176         # cut in the middle of a utf8 multibyte char.
1177         $str = to_utf8($str);
1178
1179         # allow only $len chars, but don't cut a word if it would fit in $add_len
1180         # if it doesn't fit, cut it if it's still longer than the dots we would add
1181         # remove chopped character entities entirely
1182
1183         # when chopping in the middle, distribute $len into left and right part
1184         # return early if chopping wouldn't make string shorter
1185         if ($where eq 'center') {
1186                 return $str if ($len + 5 >= length($str)); # filler is length 5
1187                 $len = int($len/2);
1188         } else {
1189                 return $str if ($len + 4 >= length($str)); # filler is length 4
1190         }
1191
1192         # regexps: ending and beginning with word part up to $add_len
1193         my $endre = qr/.{$len}\w{0,$add_len}/;
1194         my $begre = qr/\w{0,$add_len}.{$len}/;
1195
1196         if ($where eq 'left') {
1197                 $str =~ m/^(.*?)($begre)$/;
1198                 my ($lead, $body) = ($1, $2);
1199                 if (length($lead) > 4) {
1200                         $body =~ s/^[^;]*;// if ($lead =~ m/&[^;]*$/);
1201                         $lead = " ...";
1202                 }
1203                 return "$lead$body";
1204
1205         } elsif ($where eq 'center') {
1206                 $str =~ m/^($endre)(.*)$/;
1207                 my ($left, $str)  = ($1, $2);
1208                 $str =~ m/^(.*?)($begre)$/;
1209                 my ($mid, $right) = ($1, $2);
1210                 if (length($mid) > 5) {
1211                         $left  =~ s/&[^;]*$//;
1212                         $right =~ s/^[^;]*;// if ($mid =~ m/&[^;]*$/);
1213                         $mid = " ... ";
1214                 }
1215                 return "$left$mid$right";
1216
1217         } else {
1218                 $str =~ m/^($endre)(.*)$/;
1219                 my $body = $1;
1220                 my $tail = $2;
1221                 if (length($tail) > 4) {
1222                         $body =~ s/&[^;]*$//;
1223                         $tail = "... ";
1224                 }
1225                 return "$body$tail";
1226         }
1227 }
1228
1229 # takes the same arguments as chop_str, but also wraps a <span> around the
1230 # result with a title attribute if it does get chopped. Additionally, the
1231 # string is HTML-escaped.
1232 sub chop_and_escape_str {
1233         my ($str) = @_;
1234
1235         my $chopped = chop_str(@_);
1236         if ($chopped eq $str) {
1237                 return esc_html($chopped);
1238         } else {
1239                 $str =~ s/([[:cntrl:]])/?/g;
1240                 return $cgi->span({-title=>$str}, esc_html($chopped));
1241         }
1242 }
1243
1244 ## ----------------------------------------------------------------------
1245 ## functions returning short strings
1246
1247 # CSS class for given age value (in seconds)
1248 sub age_class {
1249         my $age = shift;
1250
1251         if (!defined $age) {
1252                 return "noage";
1253         } elsif ($age < 60*60*2) {
1254                 return "age0";
1255         } elsif ($age < 60*60*24*2) {
1256                 return "age1";
1257         } else {
1258                 return "age2";
1259         }
1260 }
1261
1262 # convert age in seconds to "nn units ago" string
1263 sub age_string {
1264         my $age = shift;
1265         my $age_str;
1266
1267         if ($age > 60*60*24*365*2) {
1268                 $age_str = (int $age/60/60/24/365);
1269                 $age_str .= " years ago";
1270         } elsif ($age > 60*60*24*(365/12)*2) {
1271                 $age_str = int $age/60/60/24/(365/12);
1272                 $age_str .= " months ago";
1273         } elsif ($age > 60*60*24*7*2) {
1274                 $age_str = int $age/60/60/24/7;
1275                 $age_str .= " weeks ago";
1276         } elsif ($age > 60*60*24*2) {
1277                 $age_str = int $age/60/60/24;
1278                 $age_str .= " days ago";
1279         } elsif ($age > 60*60*2) {
1280                 $age_str = int $age/60/60;
1281                 $age_str .= " hours ago";
1282         } elsif ($age > 60*2) {
1283                 $age_str = int $age/60;
1284                 $age_str .= " min ago";
1285         } elsif ($age > 2) {
1286                 $age_str = int $age;
1287                 $age_str .= " sec ago";
1288         } else {
1289                 $age_str .= " right now";
1290         }
1291         return $age_str;
1292 }
1293
1294 use constant {
1295         S_IFINVALID => 0030000,
1296         S_IFGITLINK => 0160000,
1297 };
1298
1299 # submodule/subproject, a commit object reference
1300 sub S_ISGITLINK {
1301         my $mode = shift;
1302
1303         return (($mode & S_IFMT) == S_IFGITLINK)
1304 }
1305
1306 # convert file mode in octal to symbolic file mode string
1307 sub mode_str {
1308         my $mode = oct shift;
1309
1310         if (S_ISGITLINK($mode)) {
1311                 return 'm---------';
1312         } elsif (S_ISDIR($mode & S_IFMT)) {
1313                 return 'drwxr-xr-x';
1314         } elsif (S_ISLNK($mode)) {
1315                 return 'lrwxrwxrwx';
1316         } elsif (S_ISREG($mode)) {
1317                 # git cares only about the executable bit
1318                 if ($mode & S_IXUSR) {
1319                         return '-rwxr-xr-x';
1320                 } else {
1321                         return '-rw-r--r--';
1322                 };
1323         } else {
1324                 return '----------';
1325         }
1326 }
1327
1328 # convert file mode in octal to file type string
1329 sub file_type {
1330         my $mode = shift;
1331
1332         if ($mode !~ m/^[0-7]+$/) {
1333                 return $mode;
1334         } else {
1335                 $mode = oct $mode;
1336         }
1337
1338         if (S_ISGITLINK($mode)) {
1339                 return "submodule";
1340         } elsif (S_ISDIR($mode & S_IFMT)) {
1341                 return "directory";
1342         } elsif (S_ISLNK($mode)) {
1343                 return "symlink";
1344         } elsif (S_ISREG($mode)) {
1345                 return "file";
1346         } else {
1347                 return "unknown";
1348         }
1349 }
1350
1351 # convert file mode in octal to file type description string
1352 sub file_type_long {
1353         my $mode = shift;
1354
1355         if ($mode !~ m/^[0-7]+$/) {
1356                 return $mode;
1357         } else {
1358                 $mode = oct $mode;
1359         }
1360
1361         if (S_ISGITLINK($mode)) {
1362                 return "submodule";
1363         } elsif (S_ISDIR($mode & S_IFMT)) {
1364                 return "directory";
1365         } elsif (S_ISLNK($mode)) {
1366                 return "symlink";
1367         } elsif (S_ISREG($mode)) {
1368                 if ($mode & S_IXUSR) {
1369                         return "executable";
1370                 } else {
1371                         return "file";
1372                 };
1373         } else {
1374                 return "unknown";
1375         }
1376 }
1377
1378
1379 ## ----------------------------------------------------------------------
1380 ## functions returning short HTML fragments, or transforming HTML fragments
1381 ## which don't belong to other sections
1382
1383 # format line of commit message.
1384 sub format_log_line_html {
1385         my $line = shift;
1386
1387         $line = esc_html($line, -nbsp=>1);
1388         $line =~ s{\b([0-9a-fA-F]{8,40})\b}{
1389                 $cgi->a({-href => href(action=>"object", hash=>$1),
1390                                         -class => "text"}, $1);
1391         }eg;
1392
1393         return $line;
1394 }
1395
1396 # format marker of refs pointing to given object
1397
1398 # the destination action is chosen based on object type and current context:
1399 # - for annotated tags, we choose the tag view unless it's the current view
1400 #   already, in which case we go to shortlog view
1401 # - for other refs, we keep the current view if we're in history, shortlog or
1402 #   log view, and select shortlog otherwise
1403 sub format_ref_marker {
1404         my ($refs, $id) = @_;
1405         my $markers = '';
1406
1407         if (defined $refs->{$id}) {
1408                 foreach my $ref (@{$refs->{$id}}) {
1409                         # this code exploits the fact that non-lightweight tags are the
1410                         # only indirect objects, and that they are the only objects for which
1411                         # we want to use tag instead of shortlog as action
1412                         my ($type, $name) = qw();
1413                         my $indirect = ($ref =~ s/\^\{\}$//);
1414                         # e.g. tags/v2.6.11 or heads/next
1415                         if ($ref =~ m!^(.*?)s?/(.*)$!) {
1416                                 $type = $1;
1417                                 $name = $2;
1418                         } else {
1419                                 $type = "ref";
1420                                 $name = $ref;
1421                         }
1422
1423                         my $class = $type;
1424                         $class .= " indirect" if $indirect;
1425
1426                         my $dest_action = "shortlog";
1427
1428                         if ($indirect) {
1429                                 $dest_action = "tag" unless $action eq "tag";
1430                         } elsif ($action =~ /^(history|(short)?log)$/) {
1431                                 $dest_action = $action;
1432                         }
1433
1434                         my $dest = "";
1435                         $dest .= "refs/" unless $ref =~ m!^refs/!;
1436                         $dest .= $ref;
1437
1438                         my $link = $cgi->a({
1439                                 -href => href(
1440                                         action=>$dest_action,
1441                                         hash=>$dest
1442                                 )}, $name);
1443
1444                         $markers .= " <span class=\"$class\" title=\"$ref\">" .
1445                                 $link . "</span>";
1446                 }
1447         }
1448
1449         if ($markers) {
1450                 return ' <span class="refs">'. $markers . '</span>';
1451         } else {
1452                 return "";
1453         }
1454 }
1455
1456 # format, perhaps shortened and with markers, title line
1457 sub format_subject_html {
1458         my ($long, $short, $href, $extra) = @_;
1459         $extra = '' unless defined($extra);
1460
1461         if (length($short) < length($long)) {
1462                 return $cgi->a({-href => $href, -class => "list subject",
1463                                 -title => to_utf8($long)},
1464                        esc_html($short) . $extra);
1465         } else {
1466                 return $cgi->a({-href => $href, -class => "list subject"},
1467                        esc_html($long)  . $extra);
1468         }
1469 }
1470
1471 # format git diff header line, i.e. "diff --(git|combined|cc) ..."
1472 sub format_git_diff_header_line {
1473         my $line = shift;
1474         my $diffinfo = shift;
1475         my ($from, $to) = @_;
1476
1477         if ($diffinfo->{'nparents'}) {
1478                 # combined diff
1479                 $line =~ s!^(diff (.*?) )"?.*$!$1!;
1480                 if ($to->{'href'}) {
1481                         $line .= $cgi->a({-href => $to->{'href'}, -class => "path"},
1482                                          esc_path($to->{'file'}));
1483                 } else { # file was deleted (no href)
1484                         $line .= esc_path($to->{'file'});
1485                 }
1486         } else {
1487                 # "ordinary" diff
1488                 $line =~ s!^(diff (.*?) )"?a/.*$!$1!;
1489                 if ($from->{'href'}) {
1490                         $line .= $cgi->a({-href => $from->{'href'}, -class => "path"},
1491                                          'a/' . esc_path($from->{'file'}));
1492                 } else { # file was added (no href)
1493                         $line .= 'a/' . esc_path($from->{'file'});
1494                 }
1495                 $line .= ' ';
1496                 if ($to->{'href'}) {
1497                         $line .= $cgi->a({-href => $to->{'href'}, -class => "path"},
1498                                          'b/' . esc_path($to->{'file'}));
1499                 } else { # file was deleted
1500                         $line .= 'b/' . esc_path($to->{'file'});
1501                 }
1502         }
1503
1504         return "<div class=\"diff header\">$line</div>\n";
1505 }
1506
1507 # format extended diff header line, before patch itself
1508 sub format_extended_diff_header_line {
1509         my $line = shift;
1510         my $diffinfo = shift;
1511         my ($from, $to) = @_;
1512
1513         # match <path>
1514         if ($line =~ s!^((copy|rename) from ).*$!$1! && $from->{'href'}) {
1515                 $line .= $cgi->a({-href=>$from->{'href'}, -class=>"path"},
1516                                        esc_path($from->{'file'}));
1517         }
1518         if ($line =~ s!^((copy|rename) to ).*$!$1! && $to->{'href'}) {
1519                 $line .= $cgi->a({-href=>$to->{'href'}, -class=>"path"},
1520                                  esc_path($to->{'file'}));
1521         }
1522         # match single <mode>
1523         if ($line =~ m/\s(\d{6})$/) {
1524                 $line .= '<span class="info"> (' .
1525                          file_type_long($1) .
1526                          ')</span>';
1527         }
1528         # match <hash>
1529         if ($line =~ m/^index [0-9a-fA-F]{40},[0-9a-fA-F]{40}/) {
1530                 # can match only for combined diff
1531                 $line = 'index ';
1532                 for (my $i = 0; $i < $diffinfo->{'nparents'}; $i++) {
1533                         if ($from->{'href'}[$i]) {
1534                                 $line .= $cgi->a({-href=>$from->{'href'}[$i],
1535                                                   -class=>"hash"},
1536                                                  substr($diffinfo->{'from_id'}[$i],0,7));
1537                         } else {
1538                                 $line .= '0' x 7;
1539                         }
1540                         # separator
1541                         $line .= ',' if ($i < $diffinfo->{'nparents'} - 1);
1542                 }
1543                 $line .= '..';
1544                 if ($to->{'href'}) {
1545                         $line .= $cgi->a({-href=>$to->{'href'}, -class=>"hash"},
1546                                          substr($diffinfo->{'to_id'},0,7));
1547                 } else {
1548                         $line .= '0' x 7;
1549                 }
1550
1551         } elsif ($line =~ m/^index [0-9a-fA-F]{40}..[0-9a-fA-F]{40}/) {
1552                 # can match only for ordinary diff
1553                 my ($from_link, $to_link);
1554                 if ($from->{'href'}) {
1555                         $from_link = $cgi->a({-href=>$from->{'href'}, -class=>"hash"},
1556                                              substr($diffinfo->{'from_id'},0,7));
1557                 } else {
1558                         $from_link = '0' x 7;
1559                 }
1560                 if ($to->{'href'}) {
1561                         $to_link = $cgi->a({-href=>$to->{'href'}, -class=>"hash"},
1562                                            substr($diffinfo->{'to_id'},0,7));
1563                 } else {
1564                         $to_link = '0' x 7;
1565                 }
1566                 my ($from_id, $to_id) = ($diffinfo->{'from_id'}, $diffinfo->{'to_id'});
1567                 $line =~ s!$from_id\.\.$to_id!$from_link..$to_link!;
1568         }
1569
1570         return $line . "<br/>\n";
1571 }
1572
1573 # format from-file/to-file diff header
1574 sub format_diff_from_to_header {
1575         my ($from_line, $to_line, $diffinfo, $from, $to, @parents) = @_;
1576         my $line;
1577         my $result = '';
1578
1579         $line = $from_line;
1580         #assert($line =~ m/^---/) if DEBUG;
1581         # no extra formatting for "^--- /dev/null"
1582         if (! $diffinfo->{'nparents'}) {
1583                 # ordinary (single parent) diff
1584                 if ($line =~ m!^--- "?a/!) {
1585                         if ($from->{'href'}) {
1586                                 $line = '--- a/' .
1587                                         $cgi->a({-href=>$from->{'href'}, -class=>"path"},
1588                                                 esc_path($from->{'file'}));
1589                         } else {
1590                                 $line = '--- a/' .
1591                                         esc_path($from->{'file'});
1592                         }
1593                 }
1594                 $result .= qq!<div class="diff from_file">$line</div>\n!;
1595
1596         } else {
1597                 # combined diff (merge commit)
1598                 for (my $i = 0; $i < $diffinfo->{'nparents'}; $i++) {
1599                         if ($from->{'href'}[$i]) {
1600                                 $line = '--- ' .
1601                                         $cgi->a({-href=>href(action=>"blobdiff",
1602                                                              hash_parent=>$diffinfo->{'from_id'}[$i],
1603                                                              hash_parent_base=>$parents[$i],
1604                                                              file_parent=>$from->{'file'}[$i],
1605                                                              hash=>$diffinfo->{'to_id'},
1606                                                              hash_base=>$hash,
1607                                                              file_name=>$to->{'file'}),
1608                                                  -class=>"path",
1609                                                  -title=>"diff" . ($i+1)},
1610                                                 $i+1) .
1611                                         '/' .
1612                                         $cgi->a({-href=>$from->{'href'}[$i], -class=>"path"},
1613                                                 esc_path($from->{'file'}[$i]));
1614                         } else {
1615                                 $line = '--- /dev/null';
1616                         }
1617                         $result .= qq!<div class="diff from_file">$line</div>\n!;
1618                 }
1619         }
1620
1621         $line = $to_line;
1622         #assert($line =~ m/^\+\+\+/) if DEBUG;
1623         # no extra formatting for "^+++ /dev/null"
1624         if ($line =~ m!^\+\+\+ "?b/!) {
1625                 if ($to->{'href'}) {
1626                         $line = '+++ b/' .
1627                                 $cgi->a({-href=>$to->{'href'}, -class=>"path"},
1628                                         esc_path($to->{'file'}));
1629                 } else {
1630                         $line = '+++ b/' .
1631                                 esc_path($to->{'file'});
1632                 }
1633         }
1634         $result .= qq!<div class="diff to_file">$line</div>\n!;
1635
1636         return $result;
1637 }
1638
1639 # create note for patch simplified by combined diff
1640 sub format_diff_cc_simplified {
1641         my ($diffinfo, @parents) = @_;
1642         my $result = '';
1643
1644         $result .= "<div class=\"diff header\">" .
1645                    "diff --cc ";
1646         if (!is_deleted($diffinfo)) {
1647                 $result .= $cgi->a({-href => href(action=>"blob",
1648                                                   hash_base=>$hash,
1649                                                   hash=>$diffinfo->{'to_id'},
1650                                                   file_name=>$diffinfo->{'to_file'}),
1651                                     -class => "path"},
1652                                    esc_path($diffinfo->{'to_file'}));
1653         } else {
1654                 $result .= esc_path($diffinfo->{'to_file'});
1655         }
1656         $result .= "</div>\n" . # class="diff header"
1657                    "<div class=\"diff nodifferences\">" .
1658                    "Simple merge" .
1659                    "</div>\n"; # class="diff nodifferences"
1660
1661         return $result;
1662 }
1663
1664 # format patch (diff) line (not to be used for diff headers)
1665 sub format_diff_line {
1666         my $line = shift;
1667         my ($from, $to) = @_;
1668         my $diff_class = "";
1669
1670         chomp $line;
1671
1672         if ($from && $to && ref($from->{'href'}) eq "ARRAY") {
1673                 # combined diff
1674                 my $prefix = substr($line, 0, scalar @{$from->{'href'}});
1675                 if ($line =~ m/^\@{3}/) {
1676                         $diff_class = " chunk_header";
1677                 } elsif ($line =~ m/^\\/) {
1678                         $diff_class = " incomplete";
1679                 } elsif ($prefix =~ tr/+/+/) {
1680                         $diff_class = " add";
1681                 } elsif ($prefix =~ tr/-/-/) {
1682                         $diff_class = " rem";
1683                 }
1684         } else {
1685                 # assume ordinary diff
1686                 my $char = substr($line, 0, 1);
1687                 if ($char eq '+') {
1688                         $diff_class = " add";
1689                 } elsif ($char eq '-') {
1690                         $diff_class = " rem";
1691                 } elsif ($char eq '@') {
1692                         $diff_class = " chunk_header";
1693                 } elsif ($char eq "\\") {
1694                         $diff_class = " incomplete";
1695                 }
1696         }
1697         $line = untabify($line);
1698         if ($from && $to && $line =~ m/^\@{2} /) {
1699                 my ($from_text, $from_start, $from_lines, $to_text, $to_start, $to_lines, $section) =
1700                         $line =~ m/^\@{2} (-(\d+)(?:,(\d+))?) (\+(\d+)(?:,(\d+))?) \@{2}(.*)$/;
1701
1702                 $from_lines = 0 unless defined $from_lines;
1703                 $to_lines   = 0 unless defined $to_lines;
1704
1705                 if ($from->{'href'}) {
1706                         $from_text = $cgi->a({-href=>"$from->{'href'}#l$from_start",
1707                                              -class=>"list"}, $from_text);
1708                 }
1709                 if ($to->{'href'}) {
1710                         $to_text   = $cgi->a({-href=>"$to->{'href'}#l$to_start",
1711                                              -class=>"list"}, $to_text);
1712                 }
1713                 $line = "<span class=\"chunk_info\">@@ $from_text $to_text @@</span>" .
1714                         "<span class=\"section\">" . esc_html($section, -nbsp=>1) . "</span>";
1715                 return "<div class=\"diff$diff_class\">$line</div>\n";
1716         } elsif ($from && $to && $line =~ m/^\@{3}/) {
1717                 my ($prefix, $ranges, $section) = $line =~ m/^(\@+) (.*?) \@+(.*)$/;
1718                 my (@from_text, @from_start, @from_nlines, $to_text, $to_start, $to_nlines);
1719
1720                 @from_text = split(' ', $ranges);
1721                 for (my $i = 0; $i < @from_text; ++$i) {
1722                         ($from_start[$i], $from_nlines[$i]) =
1723                                 (split(',', substr($from_text[$i], 1)), 0);
1724                 }
1725
1726                 $to_text   = pop @from_text;
1727                 $to_start  = pop @from_start;
1728                 $to_nlines = pop @from_nlines;
1729
1730                 $line = "<span class=\"chunk_info\">$prefix ";
1731                 for (my $i = 0; $i < @from_text; ++$i) {
1732                         if ($from->{'href'}[$i]) {
1733                                 $line .= $cgi->a({-href=>"$from->{'href'}[$i]#l$from_start[$i]",
1734                                                   -class=>"list"}, $from_text[$i]);
1735                         } else {
1736                                 $line .= $from_text[$i];
1737                         }
1738                         $line .= " ";
1739                 }
1740                 if ($to->{'href'}) {
1741                         $line .= $cgi->a({-href=>"$to->{'href'}#l$to_start",
1742                                           -class=>"list"}, $to_text);
1743                 } else {
1744                         $line .= $to_text;
1745                 }
1746                 $line .= " $prefix</span>" .
1747                          "<span class=\"section\">" . esc_html($section, -nbsp=>1) . "</span>";
1748                 return "<div class=\"diff$diff_class\">$line</div>\n";
1749         }
1750         return "<div class=\"diff$diff_class\">" . esc_html($line, -nbsp=>1) . "</div>\n";
1751 }
1752
1753 # Generates undef or something like "_snapshot_" or "snapshot (_tbz2_ _zip_)",
1754 # linked.  Pass the hash of the tree/commit to snapshot.
1755 sub format_snapshot_links {
1756         my ($hash) = @_;
1757         my $num_fmts = @snapshot_fmts;
1758         if ($num_fmts > 1) {
1759                 # A parenthesized list of links bearing format names.
1760                 # e.g. "snapshot (_tar.gz_ _zip_)"
1761                 return "snapshot (" . join(' ', map
1762                         $cgi->a({
1763                                 -href => href(
1764                                         action=>"snapshot",
1765                                         hash=>$hash,
1766                                         snapshot_format=>$_
1767                                 )
1768                         }, $known_snapshot_formats{$_}{'display'})
1769                 , @snapshot_fmts) . ")";
1770         } elsif ($num_fmts == 1) {
1771                 # A single "snapshot" link whose tooltip bears the format name.
1772                 # i.e. "_snapshot_"
1773                 my ($fmt) = @snapshot_fmts;
1774                 return
1775                         $cgi->a({
1776                                 -href => href(
1777                                         action=>"snapshot",
1778                                         hash=>$hash,
1779                                         snapshot_format=>$fmt
1780                                 ),
1781                                 -title => "in format: $known_snapshot_formats{$fmt}{'display'}"
1782                         }, "snapshot");
1783         } else { # $num_fmts == 0
1784                 return undef;
1785         }
1786 }
1787
1788 ## ......................................................................
1789 ## functions returning values to be passed, perhaps after some
1790 ## transformation, to other functions; e.g. returning arguments to href()
1791
1792 # returns hash to be passed to href to generate gitweb URL
1793 # in -title key it returns description of link
1794 sub get_feed_info {
1795         my $format = shift || 'Atom';
1796         my %res = (action => lc($format));
1797
1798         # feed links are possible only for project views
1799         return unless (defined $project);
1800         # some views should link to OPML, or to generic project feed,
1801         # or don't have specific feed yet (so they should use generic)
1802         return if ($action =~ /^(?:tags|heads|forks|tag|search)$/x);
1803
1804         my $branch;
1805         # branches refs uses 'refs/heads/' prefix (fullname) to differentiate
1806         # from tag links; this also makes possible to detect branch links
1807         if ((defined $hash_base && $hash_base =~ m!^refs/heads/(.*)$!) ||
1808             (defined $hash      && $hash      =~ m!^refs/heads/(.*)$!)) {
1809                 $branch = $1;
1810         }
1811         # find log type for feed description (title)
1812         my $type = 'log';
1813         if (defined $file_name) {
1814                 $type  = "history of $file_name";
1815                 $type .= "/" if ($action eq 'tree');
1816                 $type .= " on '$branch'" if (defined $branch);
1817         } else {
1818                 $type = "log of $branch" if (defined $branch);
1819         }
1820
1821         $res{-title} = $type;
1822         $res{'hash'} = (defined $branch ? "refs/heads/$branch" : undef);
1823         $res{'file_name'} = $file_name;
1824
1825         return %res;
1826 }
1827
1828 ## ----------------------------------------------------------------------
1829 ## git utility subroutines, invoking git commands
1830
1831 # returns path to the core git executable and the --git-dir parameter as list
1832 sub git_cmd {
1833         return $GIT, '--git-dir='.$git_dir;
1834 }
1835
1836 # quote the given arguments for passing them to the shell
1837 # quote_command("command", "arg 1", "arg with ' and ! characters")
1838 # => "'command' 'arg 1' 'arg with '\'' and '\!' characters'"
1839 # Try to avoid using this function wherever possible.
1840 sub quote_command {
1841         return join(' ',
1842                 map { my $a = $_; $a =~ s/(['!])/'\\$1'/g; "'$a'" } @_ );
1843 }
1844
1845 # get HEAD ref of given project as hash
1846 sub git_get_head_hash {
1847         my $project = shift;
1848         my $o_git_dir = $git_dir;
1849         my $retval = undef;
1850         $git_dir = "$projectroot/$project";
1851         if (open my $fd, "-|", git_cmd(), "rev-parse", "--verify", "HEAD") {
1852                 my $head = <$fd>;
1853                 close $fd;
1854                 if (defined $head && $head =~ /^([0-9a-fA-F]{40})$/) {
1855                         $retval = $1;
1856                 }
1857         }
1858         if (defined $o_git_dir) {
1859                 $git_dir = $o_git_dir;
1860         }
1861         return $retval;
1862 }
1863
1864 # get type of given object
1865 sub git_get_type {
1866         my $hash = shift;
1867
1868         open my $fd, "-|", git_cmd(), "cat-file", '-t', $hash or return;
1869         my $type = <$fd>;
1870         close $fd or return;
1871         chomp $type;
1872         return $type;
1873 }
1874
1875 # repository configuration
1876 our $config_file = '';
1877 our %config;
1878
1879 # store multiple values for single key as anonymous array reference
1880 # single values stored directly in the hash, not as [ <value> ]
1881 sub hash_set_multi {
1882         my ($hash, $key, $value) = @_;
1883
1884         if (!exists $hash->{$key}) {
1885                 $hash->{$key} = $value;
1886         } elsif (!ref $hash->{$key}) {
1887                 $hash->{$key} = [ $hash->{$key}, $value ];
1888         } else {
1889                 push @{$hash->{$key}}, $value;
1890         }
1891 }
1892
1893 # return hash of git project configuration
1894 # optionally limited to some section, e.g. 'gitweb'
1895 sub git_parse_project_config {
1896         my $section_regexp = shift;
1897         my %config;
1898
1899         local $/ = "\0";
1900
1901         open my $fh, "-|", git_cmd(), "config", '-z', '-l',
1902                 or return;
1903
1904         while (my $keyval = <$fh>) {
1905                 chomp $keyval;
1906                 my ($key, $value) = split(/\n/, $keyval, 2);
1907
1908                 hash_set_multi(\%config, $key, $value)
1909                         if (!defined $section_regexp || $key =~ /^(?:$section_regexp)\./o);
1910         }
1911         close $fh;
1912
1913         return %config;
1914 }
1915
1916 # convert config value to boolean: 'true' or 'false'
1917 # no value, number > 0, 'true' and 'yes' values are true
1918 # rest of values are treated as false (never as error)
1919 sub config_to_bool {
1920         my $val = shift;
1921
1922         return 1 if !defined $val;             # section.key
1923
1924         # strip leading and trailing whitespace
1925         $val =~ s/^\s+//;
1926         $val =~ s/\s+$//;
1927
1928         return (($val =~ /^\d+$/ && $val) ||   # section.key = 1
1929                 ($val =~ /^(?:true|yes)$/i));  # section.key = true
1930 }
1931
1932 # convert config value to simple decimal number
1933 # an optional value suffix of 'k', 'm', or 'g' will cause the value
1934 # to be multiplied by 1024, 1048576, or 1073741824
1935 sub config_to_int {
1936         my $val = shift;
1937
1938         # strip leading and trailing whitespace
1939         $val =~ s/^\s+//;
1940         $val =~ s/\s+$//;
1941
1942         if (my ($num, $unit) = ($val =~ /^([0-9]*)([kmg])$/i)) {
1943                 $unit = lc($unit);
1944                 # unknown unit is treated as 1
1945                 return $num * ($unit eq 'g' ? 1073741824 :
1946                                $unit eq 'm' ?    1048576 :
1947                                $unit eq 'k' ?       1024 : 1);
1948         }
1949         return $val;
1950 }
1951
1952 # convert config value to array reference, if needed
1953 sub config_to_multi {
1954         my $val = shift;
1955
1956         return ref($val) ? $val : (defined($val) ? [ $val ] : []);
1957 }
1958
1959 sub git_get_project_config {
1960         my ($key, $type) = @_;
1961
1962         # key sanity check
1963         return unless ($key);
1964         $key =~ s/^gitweb\.//;
1965         return if ($key =~ m/\W/);
1966
1967         # type sanity check
1968         if (defined $type) {
1969                 $type =~ s/^--//;
1970                 $type = undef
1971                         unless ($type eq 'bool' || $type eq 'int');
1972         }
1973
1974         # get config
1975         if (!defined $config_file ||
1976             $config_file ne "$git_dir/config") {
1977                 %config = git_parse_project_config('gitweb');
1978                 $config_file = "$git_dir/config";
1979         }
1980
1981         # check if config variable (key) exists
1982         return unless exists $config{"gitweb.$key"};
1983
1984         # ensure given type
1985         if (!defined $type) {
1986                 return $config{"gitweb.$key"};
1987         } elsif ($type eq 'bool') {
1988                 # backward compatibility: 'git config --bool' returns true/false
1989                 return config_to_bool($config{"gitweb.$key"}) ? 'true' : 'false';
1990         } elsif ($type eq 'int') {
1991                 return config_to_int($config{"gitweb.$key"});
1992         }
1993         return $config{"gitweb.$key"};
1994 }
1995
1996 # get hash of given path at given ref
1997 sub git_get_hash_by_path {
1998         my $base = shift;
1999         my $path = shift || return undef;
2000         my $type = shift;
2001
2002         $path =~ s,/+$,,;
2003
2004         open my $fd, "-|", git_cmd(), "ls-tree", $base, "--", $path
2005                 or die_error(500, "Open git-ls-tree failed");
2006         my $line = <$fd>;
2007         close $fd or return undef;
2008
2009         if (!defined $line) {
2010                 # there is no tree or hash given by $path at $base
2011                 return undef;
2012         }
2013
2014         #'100644 blob 0fa3f3a66fb6a137f6ec2c19351ed4d807070ffa  panic.c'
2015         $line =~ m/^([0-9]+) (.+) ([0-9a-fA-F]{40})\t/;
2016         if (defined $type && $type ne $2) {
2017                 # type doesn't match
2018                 return undef;
2019         }
2020         return $3;
2021 }
2022
2023 # get path of entry with given hash at given tree-ish (ref)
2024 # used to get 'from' filename for combined diff (merge commit) for renames
2025 sub git_get_path_by_hash {
2026         my $base = shift || return;
2027         my $hash = shift || return;
2028
2029         local $/ = "\0";
2030
2031         open my $fd, "-|", git_cmd(), "ls-tree", '-r', '-t', '-z', $base
2032                 or return undef;
2033         while (my $line = <$fd>) {
2034                 chomp $line;
2035
2036                 #'040000 tree 595596a6a9117ddba9fe379b6b012b558bac8423  gitweb'
2037                 #'100644 blob e02e90f0429be0d2a69b76571101f20b8f75530f  gitweb/README'
2038                 if ($line =~ m/(?:[0-9]+) (?:.+) $hash\t(.+)$/) {
2039                         close $fd;
2040                         return $1;
2041                 }
2042         }
2043         close $fd;
2044         return undef;
2045 }
2046
2047 ## ......................................................................
2048 ## git utility functions, directly accessing git repository
2049
2050 sub git_get_project_description {
2051         my $path = shift;
2052
2053         $git_dir = "$projectroot/$path";
2054         open my $fd, '<', "$git_dir/description"
2055                 or return git_get_project_config('description');
2056         my $descr = <$fd>;
2057         close $fd;
2058         if (defined $descr) {
2059                 chomp $descr;
2060         }
2061         return $descr;
2062 }
2063
2064 sub git_get_project_ctags {
2065         my $path = shift;
2066         my $ctags = {};
2067
2068         $git_dir = "$projectroot/$path";
2069         opendir my $dh, "$git_dir/ctags"
2070                 or return $ctags;
2071         foreach (grep { -f $_ } map { "$git_dir/ctags/$_" } readdir($dh)) {
2072                 open my $ct, '<', $_ or next;
2073                 my $val = <$ct>;
2074                 chomp $val;
2075                 close $ct;
2076                 my $ctag = $_; $ctag =~ s#.*/##;
2077                 $ctags->{$ctag} = $val;
2078         }
2079         closedir $dh;
2080         $ctags;
2081 }
2082
2083 sub git_populate_project_tagcloud {
2084         my $ctags = shift;
2085
2086         # First, merge different-cased tags; tags vote on casing
2087         my %ctags_lc;
2088         foreach (keys %$ctags) {
2089                 $ctags_lc{lc $_}->{count} += $ctags->{$_};
2090                 if (not $ctags_lc{lc $_}->{topcount}
2091                     or $ctags_lc{lc $_}->{topcount} < $ctags->{$_}) {
2092                         $ctags_lc{lc $_}->{topcount} = $ctags->{$_};
2093                         $ctags_lc{lc $_}->{topname} = $_;
2094                 }
2095         }
2096
2097         my $cloud;
2098         if (eval { require HTML::TagCloud; 1; }) {
2099                 $cloud = HTML::TagCloud->new;
2100                 foreach (sort keys %ctags_lc) {
2101                         # Pad the title with spaces so that the cloud looks
2102                         # less crammed.
2103                         my $title = $ctags_lc{$_}->{topname};
2104                         $title =~ s/ /&nbsp;/g;
2105                         $title =~ s/^/&nbsp;/g;
2106                         $title =~ s/$/&nbsp;/g;
2107                         $cloud->add($title, $home_link."?by_tag=".$_, $ctags_lc{$_}->{count});
2108                 }
2109         } else {
2110                 $cloud = \%ctags_lc;
2111         }
2112         $cloud;
2113 }
2114
2115 sub git_show_project_tagcloud {
2116         my ($cloud, $count) = @_;
2117         print STDERR ref($cloud)."..\n";
2118         if (ref $cloud eq 'HTML::TagCloud') {
2119                 return $cloud->html_and_css($count);
2120         } else {
2121                 my @tags = sort { $cloud->{$a}->{count} <=> $cloud->{$b}->{count} } keys %$cloud;
2122                 return '<p align="center">' . join (', ', map {
2123                         "<a href=\"$home_link?by_tag=$_\">$cloud->{$_}->{topname}</a>"
2124                 } splice(@tags, 0, $count)) . '</p>';
2125         }
2126 }
2127
2128 sub git_get_project_url_list {
2129         my $path = shift;
2130
2131         $git_dir = "$projectroot/$path";
2132         open my $fd, '<', "$git_dir/cloneurl"
2133                 or return wantarray ?
2134                 @{ config_to_multi(git_get_project_config('url')) } :
2135                    config_to_multi(git_get_project_config('url'));
2136         my @git_project_url_list = map { chomp; $_ } <$fd>;
2137         close $fd;
2138
2139         return wantarray ? @git_project_url_list : \@git_project_url_list;
2140 }
2141
2142 sub git_get_projects_list {
2143         my ($filter) = @_;
2144         my @list;
2145
2146         $filter ||= '';
2147         $filter =~ s/\.git$//;
2148
2149         my $check_forks = gitweb_check_feature('forks');
2150
2151         if (-d $projects_list) {
2152                 # search in directory
2153                 my $dir = $projects_list . ($filter ? "/$filter" : '');
2154                 # remove the trailing "/"
2155                 $dir =~ s!/+$!!;
2156                 my $pfxlen = length("$dir");
2157                 my $pfxdepth = ($dir =~ tr!/!!);
2158
2159                 File::Find::find({
2160                         follow_fast => 1, # follow symbolic links
2161                         follow_skip => 2, # ignore duplicates
2162                         dangling_symlinks => 0, # ignore dangling symlinks, silently
2163                         wanted => sub {
2164                                 # skip project-list toplevel, if we get it.
2165                                 return if (m!^[/.]$!);
2166                                 # only directories can be git repositories
2167                                 return unless (-d $_);
2168                                 # don't traverse too deep (Find is super slow on os x)
2169                                 if (($File::Find::name =~ tr!/!!) - $pfxdepth > $project_maxdepth) {
2170                                         $File::Find::prune = 1;
2171                                         return;
2172                                 }
2173
2174                                 my $subdir = substr($File::Find::name, $pfxlen + 1);
2175                                 # we check related file in $projectroot
2176                                 my $path = ($filter ? "$filter/" : '') . $subdir;
2177                                 if (check_export_ok("$projectroot/$path")) {
2178                                         push @list, { path => $path };
2179                                         $File::Find::prune = 1;
2180                                 }
2181                         },
2182                 }, "$dir");
2183
2184         } elsif (-f $projects_list) {
2185                 # read from file(url-encoded):
2186                 # 'git%2Fgit.git Linus+Torvalds'
2187                 # 'libs%2Fklibc%2Fklibc.git H.+Peter+Anvin'
2188                 # 'linux%2Fhotplug%2Fudev.git Greg+Kroah-Hartman'
2189                 my %paths;
2190                 open my $fd, '<', $projects_list or return;
2191         PROJECT:
2192                 while (my $line = <$fd>) {
2193                         chomp $line;
2194                         my ($path, $owner) = split ' ', $line;
2195                         $path = unescape($path);
2196                         $owner = unescape($owner);
2197                         if (!defined $path) {
2198                                 next;
2199                         }
2200                         if ($filter ne '') {
2201                                 # looking for forks;
2202                                 my $pfx = substr($path, 0, length($filter));
2203                                 if ($pfx ne $filter) {
2204                                         next PROJECT;
2205                                 }
2206                                 my $sfx = substr($path, length($filter));
2207                                 if ($sfx !~ /^\/.*\.git$/) {
2208                                         next PROJECT;
2209                                 }
2210                         } elsif ($check_forks) {
2211                         PATH:
2212                                 foreach my $filter (keys %paths) {
2213                                         # looking for forks;
2214                                         my $pfx = substr($path, 0, length($filter));
2215                                         if ($pfx ne $filter) {
2216                                                 next PATH;
2217                                         }
2218                                         my $sfx = substr($path, length($filter));
2219                                         if ($sfx !~ /^\/.*\.git$/) {
2220                                                 next PATH;
2221                                         }
2222                                         # is a fork, don't include it in
2223                                         # the list
2224                                         next PROJECT;
2225                                 }
2226                         }
2227                         if (check_export_ok("$projectroot/$path")) {
2228                                 my $pr = {
2229                                         path => $path,
2230                                         owner => to_utf8($owner),
2231                                 };
2232                                 push @list, $pr;
2233                                 (my $forks_path = $path) =~ s/\.git$//;
2234                                 $paths{$forks_path}++;
2235                         }
2236                 }
2237                 close $fd;
2238         }
2239         return @list;
2240 }
2241
2242 our $gitweb_project_owner = undef;
2243 sub git_get_project_list_from_file {
2244
2245         return if (defined $gitweb_project_owner);
2246
2247         $gitweb_project_owner = {};
2248         # read from file (url-encoded):
2249         # 'git%2Fgit.git Linus+Torvalds'
2250         # 'libs%2Fklibc%2Fklibc.git H.+Peter+Anvin'
2251         # 'linux%2Fhotplug%2Fudev.git Greg+Kroah-Hartman'
2252         if (-f $projects_list) {
2253                 open(my $fd, '<', $projects_list);
2254                 while (my $line = <$fd>) {
2255                         chomp $line;
2256                         my ($pr, $ow) = split ' ', $line;
2257                         $pr = unescape($pr);
2258                         $ow = unescape($ow);
2259                         $gitweb_project_owner->{$pr} = to_utf8($ow);
2260                 }
2261                 close $fd;
2262         }
2263 }
2264
2265 sub git_get_project_owner {
2266         my $project = shift;
2267         my $owner;
2268
2269         return undef unless $project;
2270         $git_dir = "$projectroot/$project";
2271
2272         if (!defined $gitweb_project_owner) {
2273                 git_get_project_list_from_file();
2274         }
2275
2276         if (exists $gitweb_project_owner->{$project}) {
2277                 $owner = $gitweb_project_owner->{$project};
2278         }
2279         if (!defined $owner){
2280                 $owner = git_get_project_config('owner');
2281         }
2282         if (!defined $owner) {
2283                 $owner = get_file_owner("$git_dir");
2284         }
2285
2286         return $owner;
2287 }
2288
2289 sub git_get_last_activity {
2290         my ($path) = @_;
2291         my $fd;
2292
2293         $git_dir = "$projectroot/$path";
2294         open($fd, "-|", git_cmd(), 'for-each-ref',
2295              '--format=%(committer)',
2296              '--sort=-committerdate',
2297              '--count=1',
2298              'refs/heads') or return;
2299         my $most_recent = <$fd>;
2300         close $fd or return;
2301         if (defined $most_recent &&
2302             $most_recent =~ / (\d+) [-+][01]\d\d\d$/) {
2303                 my $timestamp = $1;
2304                 my $age = time - $timestamp;
2305                 return ($age, age_string($age));
2306         }
2307         return (undef, undef);
2308 }
2309
2310 sub git_get_references {
2311         my $type = shift || "";
2312         my %refs;
2313         # 5dc01c595e6c6ec9ccda4f6f69c131c0dd945f8c refs/tags/v2.6.11
2314         # c39ae07f393806ccf406ef966e9a15afc43cc36a refs/tags/v2.6.11^{}
2315         open my $fd, "-|", git_cmd(), "show-ref", "--dereference",
2316                 ($type ? ("--", "refs/$type") : ()) # use -- <pattern> if $type
2317                 or return;
2318
2319         while (my $line = <$fd>) {
2320                 chomp $line;
2321                 if ($line =~ m!^([0-9a-fA-F]{40})\srefs/($type.*)$!) {
2322                         if (defined $refs{$1}) {
2323                                 push @{$refs{$1}}, $2;
2324                         } else {
2325                                 $refs{$1} = [ $2 ];
2326                         }
2327                 }
2328         }
2329         close $fd or return;
2330         return \%refs;
2331 }
2332
2333 sub git_get_rev_name_tags {
2334         my $hash = shift || return undef;
2335
2336         open my $fd, "-|", git_cmd(), "name-rev", "--tags", $hash
2337                 or return;
2338         my $name_rev = <$fd>;
2339         close $fd;
2340
2341         if ($name_rev =~ m|^$hash tags/(.*)$|) {
2342                 return $1;
2343         } else {
2344                 # catches also '$hash undefined' output
2345                 return undef;
2346         }
2347 }
2348
2349 ## ----------------------------------------------------------------------
2350 ## parse to hash functions
2351
2352 sub parse_date {
2353         my $epoch = shift;
2354         my $tz = shift || "-0000";
2355
2356         my %date;
2357         my @months = ("Jan", "Feb", "Mar", "Apr", "May", "Jun", "Jul", "Aug", "Sep", "Oct", "Nov", "Dec");
2358         my @days = ("Sun", "Mon", "Tue", "Wed", "Thu", "Fri", "Sat");
2359         my ($sec, $min, $hour, $mday, $mon, $year, $wday, $yday) = gmtime($epoch);
2360         $date{'hour'} = $hour;
2361         $date{'minute'} = $min;
2362         $date{'mday'} = $mday;
2363         $date{'day'} = $days[$wday];
2364         $date{'month'} = $months[$mon];
2365         $date{'rfc2822'}   = sprintf "%s, %d %s %4d %02d:%02d:%02d +0000",
2366                              $days[$wday], $mday, $months[$mon], 1900+$year, $hour ,$min, $sec;
2367         $date{'mday-time'} = sprintf "%d %s %02d:%02d",
2368                              $mday, $months[$mon], $hour ,$min;
2369         $date{'iso-8601'}  = sprintf "%04d-%02d-%02dT%02d:%02d:%02dZ",
2370                              1900+$year, 1+$mon, $mday, $hour ,$min, $sec;
2371
2372         $tz =~ m/^([+\-][0-9][0-9])([0-9][0-9])$/;
2373         my $local = $epoch + ((int $1 + ($2/60)) * 3600);
2374         ($sec, $min, $hour, $mday, $mon, $year, $wday, $yday) = gmtime($local);
2375         $date{'hour_local'} = $hour;
2376         $date{'minute_local'} = $min;
2377         $date{'tz_local'} = $tz;
2378         $date{'iso-tz'} = sprintf("%04d-%02d-%02d %02d:%02d:%02d %s",
2379                                   1900+$year, $mon+1, $mday,
2380                                   $hour, $min, $sec, $tz);
2381         return %date;
2382 }
2383
2384 sub parse_tag {
2385         my $tag_id = shift;
2386         my %tag;
2387         my @comment;
2388
2389         open my $fd, "-|", git_cmd(), "cat-file", "tag", $tag_id or return;
2390         $tag{'id'} = $tag_id;
2391         while (my $line = <$fd>) {
2392                 chomp $line;
2393                 if ($line =~ m/^object ([0-9a-fA-F]{40})$/) {
2394                         $tag{'object'} = $1;
2395                 } elsif ($line =~ m/^type (.+)$/) {
2396                         $tag{'type'} = $1;
2397                 } elsif ($line =~ m/^tag (.+)$/) {
2398                         $tag{'name'} = $1;
2399                 } elsif ($line =~ m/^tagger (.*) ([0-9]+) (.*)$/) {
2400                         $tag{'author'} = $1;
2401                         $tag{'epoch'} = $2;
2402                         $tag{'tz'} = $3;
2403                 } elsif ($line =~ m/--BEGIN/) {
2404                         push @comment, $line;
2405                         last;
2406                 } elsif ($line eq "") {
2407                         last;
2408                 }
2409         }
2410         push @comment, <$fd>;
2411         $tag{'comment'} = \@comment;
2412         close $fd or return;
2413         if (!defined $tag{'name'}) {
2414                 return
2415         };
2416         return %tag
2417 }
2418
2419 sub parse_commit_text {
2420         my ($commit_text, $withparents) = @_;
2421         my @commit_lines = split '\n', $commit_text;
2422         my %co;
2423
2424         pop @commit_lines; # Remove '\0'
2425
2426         if (! @commit_lines) {
2427                 return;
2428         }
2429
2430         my $header = shift @commit_lines;
2431         if ($header !~ m/^[0-9a-fA-F]{40}/) {
2432                 return;
2433         }
2434         ($co{'id'}, my @parents) = split ' ', $header;
2435         while (my $line = shift @commit_lines) {
2436                 last if $line eq "\n";
2437                 if ($line =~ m/^tree ([0-9a-fA-F]{40})$/) {
2438                         $co{'tree'} = $1;
2439                 } elsif ((!defined $withparents) && ($line =~ m/^parent ([0-9a-fA-F]{40})$/)) {
2440                         push @parents, $1;
2441                 } elsif ($line =~ m/^author (.*) ([0-9]+) (.*)$/) {
2442                         $co{'author'} = $1;
2443                         $co{'author_epoch'} = $2;
2444                         $co{'author_tz'} = $3;
2445                         if ($co{'author'} =~ m/^([^<]+) <([^>]*)>/) {
2446                                 $co{'author_name'}  = $1;
2447                                 $co{'author_email'} = $2;
2448                         } else {
2449                                 $co{'author_name'} = $co{'author'};
2450                         }
2451                 } elsif ($line =~ m/^committer (.*) ([0-9]+) (.*)$/) {
2452                         $co{'committer'} = $1;
2453                         $co{'committer_epoch'} = $2;
2454                         $co{'committer_tz'} = $3;
2455                         $co{'committer_name'} = $co{'committer'};
2456                         if ($co{'committer'} =~ m/^([^<]+) <([^>]*)>/) {
2457                                 $co{'committer_name'}  = $1;
2458                                 $co{'committer_email'} = $2;
2459                         } else {
2460                                 $co{'committer_name'} = $co{'committer'};
2461                         }
2462                 }
2463         }
2464         if (!defined $co{'tree'}) {
2465                 return;
2466         };
2467         $co{'parents'} = \@parents;
2468         $co{'parent'} = $parents[0];
2469
2470         foreach my $title (@commit_lines) {
2471                 $title =~ s/^    //;
2472                 if ($title ne "") {
2473                         $co{'title'} = chop_str($title, 80, 5);
2474                         # remove leading stuff of merges to make the interesting part visible
2475                         if (length($title) > 50) {
2476                                 $title =~ s/^Automatic //;
2477                                 $title =~ s/^merge (of|with) /Merge ... /i;
2478                                 if (length($title) > 50) {
2479                                         $title =~ s/(http|rsync):\/\///;
2480                                 }
2481                                 if (length($title) > 50) {
2482                                         $title =~ s/(master|www|rsync)\.//;
2483                                 }
2484                                 if (length($title) > 50) {
2485                                         $title =~ s/kernel.org:?//;
2486                                 }
2487                                 if (length($title) > 50) {
2488                                         $title =~ s/\/pub\/scm//;
2489                                 }
2490                         }
2491                         $co{'title_short'} = chop_str($title, 50, 5);
2492                         last;
2493                 }
2494         }
2495         if (! defined $co{'title'} || $co{'title'} eq "") {
2496                 $co{'title'} = $co{'title_short'} = '(no commit message)';
2497         }
2498         # remove added spaces
2499         foreach my $line (@commit_lines) {
2500                 $line =~ s/^    //;
2501         }
2502         $co{'comment'} = \@commit_lines;
2503
2504         my $age = time - $co{'committer_epoch'};
2505         $co{'age'} = $age;
2506         $co{'age_string'} = age_string($age);
2507         my ($sec, $min, $hour, $mday, $mon, $year, $wday, $yday) = gmtime($co{'committer_epoch'});
2508         if ($age > 60*60*24*7*2) {
2509                 $co{'age_string_date'} = sprintf "%4i-%02u-%02i", 1900 + $year, $mon+1, $mday;
2510                 $co{'age_string_age'} = $co{'age_string'};
2511         } else {
2512                 $co{'age_string_date'} = $co{'age_string'};
2513                 $co{'age_string_age'} = sprintf "%4i-%02u-%02i", 1900 + $year, $mon+1, $mday;
2514         }
2515         return %co;
2516 }
2517
2518 sub parse_commit {
2519         my ($commit_id) = @_;
2520         my %co;
2521
2522         local $/ = "\0";
2523
2524         open my $fd, "-|", git_cmd(), "rev-list",
2525                 "--parents",
2526                 "--header",
2527                 "--max-count=1",
2528                 $commit_id,
2529                 "--",
2530                 or die_error(500, "Open git-rev-list failed");
2531         %co = parse_commit_text(<$fd>, 1);
2532         close $fd;
2533
2534         return %co;
2535 }
2536
2537 sub parse_commits {
2538         my ($commit_id, $maxcount, $skip, $filename, @args) = @_;
2539         my @cos;
2540
2541         $maxcount ||= 1;
2542         $skip ||= 0;
2543
2544         local $/ = "\0";
2545
2546         open my $fd, "-|", git_cmd(), "rev-list",
2547                 "--header",
2548                 @args,
2549                 ("--max-count=" . $maxcount),
2550                 ("--skip=" . $skip),
2551                 @extra_options,
2552                 $commit_id,
2553                 "--",
2554                 ($filename ? ($filename) : ())
2555                 or die_error(500, "Open git-rev-list failed");
2556         while (my $line = <$fd>) {
2557                 my %co = parse_commit_text($line);
2558                 push @cos, \%co;
2559         }
2560         close $fd;
2561
2562         return wantarray ? @cos : \@cos;
2563 }
2564
2565 # parse line of git-diff-tree "raw" output
2566 sub parse_difftree_raw_line {
2567         my $line = shift;
2568         my %res;
2569
2570         # ':100644 100644 03b218260e99b78c6df0ed378e59ed9205ccc96d 3b93d5e7cc7f7dd4ebed13a5cc1a4ad976fc94d8 M   ls-files.c'
2571         # ':100644 100644 7f9281985086971d3877aca27704f2aaf9c448ce bc190ebc71bbd923f2b728e505408f5e54bd073a M   rev-tree.c'
2572         if ($line =~ m/^:([0-7]{6}) ([0-7]{6}) ([0-9a-fA-F]{40}) ([0-9a-fA-F]{40}) (.)([0-9]{0,3})\t(.*)$/) {
2573                 $res{'from_mode'} = $1;
2574                 $res{'to_mode'} = $2;
2575                 $res{'from_id'} = $3;
2576                 $res{'to_id'} = $4;
2577                 $res{'status'} = $5;
2578                 $res{'similarity'} = $6;
2579                 if ($res{'status'} eq 'R' || $res{'status'} eq 'C') { # renamed or copied
2580                         ($res{'from_file'}, $res{'to_file'}) = map { unquote($_) } split("\t", $7);
2581                 } else {
2582                         $res{'from_file'} = $res{'to_file'} = $res{'file'} = unquote($7);
2583                 }
2584         }
2585         # '::100755 100755 100755 60e79ca1b01bc8b057abe17ddab484699a7f5fdb 94067cc5f73388f33722d52ae02f44692bc07490 94067cc5f73388f33722d52ae02f44692bc07490 MR git-gui/git-gui.sh'
2586         # combined diff (for merge commit)
2587         elsif ($line =~ s/^(::+)((?:[0-7]{6} )+)((?:[0-9a-fA-F]{40} )+)([a-zA-Z]+)\t(.*)$//) {
2588                 $res{'nparents'}  = length($1);
2589                 $res{'from_mode'} = [ split(' ', $2) ];
2590                 $res{'to_mode'} = pop @{$res{'from_mode'}};
2591                 $res{'from_id'} = [ split(' ', $3) ];
2592                 $res{'to_id'} = pop @{$res{'from_id'}};
2593                 $res{'status'} = [ split('', $4) ];
2594                 $res{'to_file'} = unquote($5);
2595         }
2596         # 'c512b523472485aef4fff9e57b229d9d243c967f'
2597         elsif ($line =~ m/^([0-9a-fA-F]{40})$/) {
2598                 $res{'commit'} = $1;
2599         }
2600
2601         return wantarray ? %res : \%res;
2602 }
2603
2604 # wrapper: return parsed line of git-diff-tree "raw" output
2605 # (the argument might be raw line, or parsed info)
2606 sub parsed_difftree_line {
2607         my $line_or_ref = shift;
2608
2609         if (ref($line_or_ref) eq "HASH") {
2610                 # pre-parsed (or generated by hand)
2611                 return $line_or_ref;
2612         } else {
2613                 return parse_difftree_raw_line($line_or_ref);
2614         }
2615 }
2616
2617 # parse line of git-ls-tree output
2618 sub parse_ls_tree_line {
2619         my $line = shift;
2620         my %opts = @_;
2621         my %res;
2622
2623         #'100644 blob 0fa3f3a66fb6a137f6ec2c19351ed4d807070ffa  panic.c'
2624         $line =~ m/^([0-9]+) (.+) ([0-9a-fA-F]{40})\t(.+)$/s;
2625
2626         $res{'mode'} = $1;
2627         $res{'type'} = $2;
2628         $res{'hash'} = $3;
2629         if ($opts{'-z'}) {
2630                 $res{'name'} = $4;
2631         } else {
2632                 $res{'name'} = unquote($4);
2633         }
2634
2635         return wantarray ? %res : \%res;
2636 }
2637
2638 # generates _two_ hashes, references to which are passed as 2 and 3 argument
2639 sub parse_from_to_diffinfo {
2640         my ($diffinfo, $from, $to, @parents) = @_;
2641
2642         if ($diffinfo->{'nparents'}) {
2643                 # combined diff
2644                 $from->{'file'} = [];
2645                 $from->{'href'} = [];
2646                 fill_from_file_info($diffinfo, @parents)
2647                         unless exists $diffinfo->{'from_file'};
2648                 for (my $i = 0; $i < $diffinfo->{'nparents'}; $i++) {
2649                         $from->{'file'}[$i] =
2650                                 defined $diffinfo->{'from_file'}[$i] ?
2651                                         $diffinfo->{'from_file'}[$i] :
2652                                         $diffinfo->{'to_file'};
2653                         if ($diffinfo->{'status'}[$i] ne "A") { # not new (added) file
2654                                 $from->{'href'}[$i] = href(action=>"blob",
2655                                                            hash_base=>$parents[$i],
2656                                                            hash=>$diffinfo->{'from_id'}[$i],
2657                                                            file_name=>$from->{'file'}[$i]);
2658                         } else {
2659                                 $from->{'href'}[$i] = undef;
2660                         }
2661                 }
2662         } else {
2663                 # ordinary (not combined) diff
2664                 $from->{'file'} = $diffinfo->{'from_file'};
2665                 if ($diffinfo->{'status'} ne "A") { # not new (added) file
2666                         $from->{'href'} = href(action=>"blob", hash_base=>$hash_parent,
2667                                                hash=>$diffinfo->{'from_id'},
2668                                                file_name=>$from->{'file'});
2669                 } else {
2670                         delete $from->{'href'};
2671                 }
2672         }
2673
2674         $to->{'file'} = $diffinfo->{'to_file'};
2675         if (!is_deleted($diffinfo)) { # file exists in result
2676                 $to->{'href'} = href(action=>"blob", hash_base=>$hash,
2677                                      hash=>$diffinfo->{'to_id'},
2678                                      file_name=>$to->{'file'});
2679         } else {
2680                 delete $to->{'href'};
2681         }
2682 }
2683
2684 ## ......................................................................
2685 ## parse to array of hashes functions
2686
2687 sub git_get_heads_list {
2688         my $limit = shift;
2689         my @headslist;
2690
2691         open my $fd, '-|', git_cmd(), 'for-each-ref',
2692                 ($limit ? '--count='.($limit+1) : ()), '--sort=-committerdate',
2693                 '--format=%(objectname) %(refname) %(subject)%00%(committer)',
2694                 'refs/heads'
2695                 or return;
2696         while (my $line = <$fd>) {
2697                 my %ref_item;
2698
2699                 chomp $line;
2700                 my ($refinfo, $committerinfo) = split(/\0/, $line);
2701                 my ($hash, $name, $title) = split(' ', $refinfo, 3);
2702                 my ($committer, $epoch, $tz) =
2703                         ($committerinfo =~ /^(.*) ([0-9]+) (.*)$/);
2704                 $ref_item{'fullname'}  = $name;
2705                 $name =~ s!^refs/heads/!!;
2706
2707                 $ref_item{'name'}  = $name;
2708                 $ref_item{'id'}    = $hash;
2709                 $ref_item{'title'} = $title || '(no commit message)';
2710                 $ref_item{'epoch'} = $epoch;
2711                 if ($epoch) {
2712                         $ref_item{'age'} = age_string(time - $ref_item{'epoch'});
2713                 } else {
2714                         $ref_item{'age'} = "unknown";
2715                 }
2716
2717                 push @headslist, \%ref_item;
2718         }
2719         close $fd;
2720
2721         return wantarray ? @headslist : \@headslist;
2722 }
2723
2724 sub git_get_tags_list {
2725         my $limit = shift;
2726         my @tagslist;
2727
2728         open my $fd, '-|', git_cmd(), 'for-each-ref',
2729                 ($limit ? '--count='.($limit+1) : ()), '--sort=-creatordate',
2730                 '--format=%(objectname) %(objecttype) %(refname) '.
2731                 '%(*objectname) %(*objecttype) %(subject)%00%(creator)',
2732                 'refs/tags'
2733                 or return;
2734         while (my $line = <$fd>) {
2735                 my %ref_item;
2736
2737                 chomp $line;
2738                 my ($refinfo, $creatorinfo) = split(/\0/, $line);
2739                 my ($id, $type, $name, $refid, $reftype, $title) = split(' ', $refinfo, 6);
2740                 my ($creator, $epoch, $tz) =
2741                         ($creatorinfo =~ /^(.*) ([0-9]+) (.*)$/);
2742                 $ref_item{'fullname'} = $name;
2743                 $name =~ s!^refs/tags/!!;
2744
2745                 $ref_item{'type'} = $type;
2746                 $ref_item{'id'} = $id;
2747                 $ref_item{'name'} = $name;
2748                 if ($type eq "tag") {
2749                         $ref_item{'subject'} = $title;
2750                         $ref_item{'reftype'} = $reftype;
2751                         $ref_item{'refid'}   = $refid;
2752                 } else {
2753                         $ref_item{'reftype'} = $type;
2754                         $ref_item{'refid'}   = $id;
2755                 }
2756
2757                 if ($type eq "tag" || $type eq "commit") {
2758                         $ref_item{'epoch'} = $epoch;
2759                         if ($epoch) {
2760                                 $ref_item{'age'} = age_string(time - $ref_item{'epoch'});
2761                         } else {
2762                                 $ref_item{'age'} = "unknown";
2763                         }
2764                 }
2765
2766                 push @tagslist, \%ref_item;
2767         }
2768         close $fd;
2769
2770         return wantarray ? @tagslist : \@tagslist;
2771 }
2772
2773 ## ----------------------------------------------------------------------
2774 ## filesystem-related functions
2775
2776 sub get_file_owner {
2777         my $path = shift;
2778
2779         my ($dev, $ino, $mode, $nlink, $st_uid, $st_gid, $rdev, $size) = stat($path);
2780         my ($name, $passwd, $uid, $gid, $quota, $comment, $gcos, $dir, $shell) = getpwuid($st_uid);
2781         if (!defined $gcos) {
2782                 return undef;
2783         }
2784         my $owner = $gcos;
2785         $owner =~ s/[,;].*$//;
2786         return to_utf8($owner);
2787 }
2788
2789 # assume that file exists
2790 sub insert_file {
2791         my $filename = shift;
2792
2793         open my $fd, '<', $filename;
2794         print map { to_utf8($_) } <$fd>;
2795         close $fd;
2796 }
2797
2798 ## ......................................................................
2799 ## mimetype related functions
2800
2801 sub mimetype_guess_file {
2802         my $filename = shift;
2803         my $mimemap = shift;
2804         -r $mimemap or return undef;
2805
2806         my %mimemap;
2807         open(my $mh, '<', $mimemap) or return undef;
2808         while (<$mh>) {
2809                 next if m/^#/; # skip comments
2810                 my ($mimetype, $exts) = split(/\t+/);
2811                 if (defined $exts) {
2812                         my @exts = split(/\s+/, $exts);
2813                         foreach my $ext (@exts) {
2814                                 $mimemap{$ext} = $mimetype;
2815                         }
2816                 }
2817         }
2818         close($mh);
2819
2820         $filename =~ /\.([^.]*)$/;
2821         return $mimemap{$1};
2822 }
2823
2824 sub mimetype_guess {
2825         my $filename = shift;
2826         my $mime;
2827         $filename =~ /\./ or return undef;
2828
2829         if ($mimetypes_file) {
2830                 my $file = $mimetypes_file;
2831                 if ($file !~ m!^/!) { # if it is relative path
2832                         # it is relative to project
2833                         $file = "$projectroot/$project/$file";
2834                 }
2835                 $mime = mimetype_guess_file($filename, $file);
2836         }
2837         $mime ||= mimetype_guess_file($filename, '/etc/mime.types');
2838         return $mime;
2839 }
2840
2841 sub blob_mimetype {
2842         my $fd = shift;
2843         my $filename = shift;
2844
2845         if ($filename) {
2846                 my $mime = mimetype_guess($filename);
2847                 $mime and return $mime;
2848         }
2849
2850         # just in case
2851         return $default_blob_plain_mimetype unless $fd;
2852
2853         if (-T $fd) {
2854                 return 'text/plain';
2855         } elsif (! $filename) {
2856                 return 'application/octet-stream';
2857         } elsif ($filename =~ m/\.png$/i) {
2858                 return 'image/png';
2859         } elsif ($filename =~ m/\.gif$/i) {
2860                 return 'image/gif';
2861         } elsif ($filename =~ m/\.jpe?g$/i) {
2862                 return 'image/jpeg';
2863         } else {
2864                 return 'application/octet-stream';
2865         }
2866 }
2867
2868 sub blob_contenttype {
2869         my ($fd, $file_name, $type) = @_;
2870
2871         $type ||= blob_mimetype($fd, $file_name);
2872         if ($type eq 'text/plain' && defined $default_text_plain_charset) {
2873                 $type .= "; charset=$default_text_plain_charset";
2874         }
2875
2876         return $type;
2877 }
2878
2879 ## ======================================================================
2880 ## functions printing HTML: header, footer, error page
2881
2882 sub git_header_html {
2883         my $status = shift || "200 OK";
2884         my $expires = shift;
2885
2886         my $title = "$site_name";
2887         if (defined $project) {
2888                 $title .= " - " . to_utf8($project);
2889                 if (defined $action) {
2890                         $title .= "/$action";
2891                         if (defined $file_name) {
2892                                 $title .= " - " . esc_path($file_name);
2893                                 if ($action eq "tree" && $file_name !~ m|/$|) {
2894                                         $title .= "/";
2895                                 }
2896                         }
2897                 }
2898         }
2899         my $content_type;
2900         # require explicit support from the UA if we are to send the page as
2901         # 'application/xhtml+xml', otherwise send it as plain old 'text/html'.
2902         # we have to do this because MSIE sometimes globs '*/*', pretending to
2903         # support xhtml+xml but choking when it gets what it asked for.
2904         if (defined $cgi->http('HTTP_ACCEPT') &&
2905             $cgi->http('HTTP_ACCEPT') =~ m/(,|;|\s|^)application\/xhtml\+xml(,|;|\s|$)/ &&
2906             $cgi->Accept('application/xhtml+xml') != 0) {
2907                 $content_type = 'application/xhtml+xml';
2908         } else {
2909                 $content_type = 'text/html';
2910         }
2911         print $cgi->header(-type=>$content_type, -charset => 'utf-8',
2912                            -status=> $status, -expires => $expires);
2913         my $mod_perl_version = $ENV{'MOD_PERL'} ? " $ENV{'MOD_PERL'}" : '';
2914         print <<EOF;
2915 <?xml version="1.0" encoding="utf-8"?>
2916 <!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Strict//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-strict.dtd">
2917 <html xmlns="http://www.w3.org/1999/xhtml" xml:lang="en-US" lang="en-US">
2918 <!-- git web interface version $version, (C) 2005-2006, Kay Sievers <kay.sievers\@vrfy.org>, Christian Gierke -->
2919 <!-- git core binaries version $git_version -->
2920 <head>
2921 <meta http-equiv="content-type" content="$content_type; charset=utf-8"/>
2922 <meta name="generator" content="gitweb/$version git/$git_version$mod_perl_version"/>
2923 <meta name="robots" content="index, nofollow"/>
2924 <title>$title</title>
2925 EOF
2926         # the stylesheet, favicon etc urls won't work correctly with path_info
2927         # unless we set the appropriate base URL
2928         if ($ENV{'PATH_INFO'}) {
2929                 print "<base href=\"".esc_url($base_url)."\" />\n";
2930         }
2931         # print out each stylesheet that exist, providing backwards capability
2932         # for those people who defined $stylesheet in a config file
2933         if (defined $stylesheet) {
2934                 print '<link rel="stylesheet" type="text/css" href="'.$stylesheet.'"/>'."\n";
2935         } else {
2936                 foreach my $stylesheet (@stylesheets) {
2937                         next unless $stylesheet;
2938                         print '<link rel="stylesheet" type="text/css" href="'.$stylesheet.'"/>'."\n";
2939                 }
2940         }
2941         if (defined $project) {
2942                 my %href_params = get_feed_info();
2943                 if (!exists $href_params{'-title'}) {
2944                         $href_params{'-title'} = 'log';
2945                 }
2946
2947                 foreach my $format qw(RSS Atom) {
2948                         my $type = lc($format);
2949                         my %link_attr = (
2950                                 '-rel' => 'alternate',
2951                                 '-title' => "$project - $href_params{'-title'} - $format feed",
2952                                 '-type' => "application/$type+xml"
2953                         );
2954
2955                         $href_params{'action'} = $type;
2956                         $link_attr{'-href'} = href(%href_params);
2957                         print "<link ".
2958                               "rel=\"$link_attr{'-rel'}\" ".
2959                               "title=\"$link_attr{'-title'}\" ".
2960                               "href=\"$link_attr{'-href'}\" ".
2961                               "type=\"$link_attr{'-type'}\" ".
2962                               "/>\n";
2963
2964                         $href_params{'extra_options'} = '--no-merges';
2965                         $link_attr{'-href'} = href(%href_params);
2966                         $link_attr{'-title'} .= ' (no merges)';
2967                         print "<link ".
2968                               "rel=\"$link_attr{'-rel'}\" ".
2969                               "title=\"$link_attr{'-title'}\" ".
2970                               "href=\"$link_attr{'-href'}\" ".
2971                               "type=\"$link_attr{'-type'}\" ".
2972                               "/>\n";
2973                 }
2974
2975         } else {
2976                 printf('<link rel="alternate" title="%s projects list" '.
2977                        'href="%s" type="text/plain; charset=utf-8" />'."\n",
2978                        $site_name, href(project=>undef, action=>"project_index"));
2979                 printf('<link rel="alternate" title="%s projects feeds" '.
2980                        'href="%s" type="text/x-opml" />'."\n",
2981                        $site_name, href(project=>undef, action=>"opml"));
2982         }
2983         if (defined $favicon) {
2984                 print qq(<link rel="shortcut icon" href="$favicon" type="image/png" />\n);
2985         }
2986
2987         print "</head>\n" .
2988               "<body>\n";
2989
2990         if (-f $site_header) {
2991                 insert_file($site_header);
2992         }
2993
2994         print "<div class=\"page_header\">\n" .
2995               $cgi->a({-href => esc_url($logo_url),
2996                        -title => $logo_label},
2997                       qq(<img src="$logo" width="72" height="27" alt="git" class="logo"/>));
2998         print $cgi->a({-href => esc_url($home_link)}, $home_link_str) . " / ";
2999         if (defined $project) {
3000                 print $cgi->a({-href => href(action=>"summary")}, esc_html($project));
3001                 if (defined $action) {
3002                         print " / $action";
3003                 }
3004                 print "\n";
3005         }
3006         print "</div>\n";
3007
3008         my $have_search = gitweb_check_feature('search');
3009         if (defined $project && $have_search) {
3010                 if (!defined $searchtext) {
3011                         $searchtext = "";
3012                 }
3013                 my $search_hash;
3014                 if (defined $hash_base) {
3015                         $search_hash = $hash_base;
3016                 } elsif (defined $hash) {
3017                         $search_hash = $hash;
3018                 } else {
3019                         $search_hash = "HEAD";
3020                 }
3021                 my $action = $my_uri;
3022                 my $use_pathinfo = gitweb_check_feature('pathinfo');
3023                 if ($use_pathinfo) {
3024                         $action .= "/".esc_url($project);
3025                 }
3026                 print $cgi->startform(-method => "get", -action => $action) .
3027                       "<div class=\"search\">\n" .
3028                       (!$use_pathinfo &&
3029                       $cgi->input({-name=>"p", -value=>$project, -type=>"hidden"}) . "\n") .
3030                       $cgi->input({-name=>"a", -value=>"search", -type=>"hidden"}) . "\n" .
3031                       $cgi->input({-name=>"h", -value=>$search_hash, -type=>"hidden"}) . "\n" .
3032                       $cgi->popup_menu(-name => 'st', -default => 'commit',
3033                                        -values => ['commit', 'grep', 'author', 'committer', 'pickaxe']) .
3034                       $cgi->sup($cgi->a({-href => href(action=>"search_help")}, "?")) .
3035                       " search:\n",
3036                       $cgi->textfield(-name => "s", -value => $searchtext) . "\n" .
3037                       "<span title=\"Extended regular expression\">" .
3038                       $cgi->checkbox(-name => 'sr', -value => 1, -label => 're',
3039                                      -checked => $search_use_regexp) .
3040                       "</span>" .
3041                       "</div>" .
3042                       $cgi->end_form() . "\n";
3043         }
3044 }
3045
3046 sub git_footer_html {
3047         my $feed_class = 'rss_logo';
3048
3049         print "<div class=\"page_footer\">\n";
3050         if (defined $project) {
3051                 my $descr = git_get_project_description($project);
3052                 if (defined $descr) {
3053                         print "<div class=\"page_footer_text\">" . esc_html($descr) . "</div>\n";
3054                 }
3055
3056                 my %href_params = get_feed_info();
3057                 if (!%href_params) {
3058                         $feed_class .= ' generic';
3059                 }
3060                 $href_params{'-title'} ||= 'log';
3061
3062                 foreach my $format qw(RSS Atom) {
3063                         $href_params{'action'} = lc($format);
3064                         print $cgi->a({-href => href(%href_params),
3065                                       -title => "$href_params{'-title'} $format feed",
3066                                       -class => $feed_class}, $format)."\n";
3067                 }
3068
3069         } else {
3070                 print $cgi->a({-href => href(project=>undef, action=>"opml"),
3071                               -class => $feed_class}, "OPML") . " ";
3072                 print $cgi->a({-href => href(project=>undef, action=>"project_index"),
3073                               -class => $feed_class}, "TXT") . "\n";
3074         }
3075         print "</div>\n"; # class="page_footer"
3076
3077         if (-f $site_footer) {
3078                 insert_file($site_footer);
3079         }
3080
3081         print "</body>\n" .
3082               "</html>";
3083 }
3084
3085 # die_error(<http_status_code>, <error_message>)
3086 # Example: die_error(404, 'Hash not found')
3087 # By convention, use the following status codes (as defined in RFC 2616):
3088 # 400: Invalid or missing CGI parameters, or
3089 #      requested object exists but has wrong type.
3090 # 403: Requested feature (like "pickaxe" or "snapshot") not enabled on
3091 #      this server or project.
3092 # 404: Requested object/revision/project doesn't exist.
3093 # 500: The server isn't configured properly, or
3094 #      an internal error occurred (e.g. failed assertions caused by bugs), or
3095 #      an unknown error occurred (e.g. the git binary died unexpectedly).
3096 sub die_error {
3097         my $status = shift || 500;
3098         my $error = shift || "Internal server error";
3099
3100         my %http_responses = (400 => '400 Bad Request',
3101                               403 => '403 Forbidden',
3102                               404 => '404 Not Found',
3103                               500 => '500 Internal Server Error');
3104         git_header_html($http_responses{$status});
3105         print <<EOF;
3106 <div class="page_body">
3107 <br /><br />
3108 $status - $error
3109 <br />
3110 </div>
3111 EOF
3112         git_footer_html();
3113         exit;
3114 }
3115
3116 ## ----------------------------------------------------------------------
3117 ## functions printing or outputting HTML: navigation
3118
3119 sub git_print_page_nav {
3120         my ($current, $suppress, $head, $treehead, $treebase, $extra) = @_;
3121         $extra = '' if !defined $extra; # pager or formats
3122
3123         my @navs = qw(summary shortlog log commit commitdiff tree);
3124         if ($suppress) {
3125                 @navs = grep { $_ ne $suppress } @navs;
3126         }
3127
3128         my %arg = map { $_ => {action=>$_} } @navs;
3129         if (defined $head) {
3130                 for (qw(commit commitdiff)) {
3131                         $arg{$_}{'hash'} = $head;
3132                 }
3133                 if ($current =~ m/^(tree | log | shortlog | commit | commitdiff | search)$/x) {
3134                         for (qw(shortlog log)) {
3135                                 $arg{$_}{'hash'} = $head;
3136                         }
3137                 }
3138         }
3139
3140         $arg{'tree'}{'hash'} = $treehead if defined $treehead;
3141         $arg{'tree'}{'hash_base'} = $treebase if defined $treebase;
3142
3143         my @actions = gitweb_get_feature('actions');
3144         my %repl = (
3145                 '%' => '%',
3146                 'n' => $project,         # project name
3147                 'f' => $git_dir,         # project path within filesystem
3148                 'h' => $treehead || '',  # current hash ('h' parameter)
3149                 'b' => $treebase || '',  # hash base ('hb' parameter)
3150         );
3151         while (@actions) {
3152                 my ($label, $link, $pos) = splice(@actions,0,3);
3153                 # insert
3154                 @navs = map { $_ eq $pos ? ($_, $label) : $_ } @navs;
3155                 # munch munch
3156                 $link =~ s/%([%nfhb])/$repl{$1}/g;
3157                 $arg{$label}{'_href'} = $link;
3158         }
3159
3160         print "<div class=\"page_nav\">\n" .
3161                 (join " | ",
3162                  map { $_ eq $current ?
3163                        $_ : $cgi->a({-href => ($arg{$_}{_href} ? $arg{$_}{_href} : href(%{$arg{$_}}))}, "$_")
3164                  } @navs);
3165         print "<br/>\n$extra<br/>\n" .
3166               "</div>\n";
3167 }
3168
3169 sub format_paging_nav {
3170         my ($action, $hash, $head, $page, $has_next_link) = @_;
3171         my $paging_nav;
3172
3173
3174         if ($hash ne $head || $page) {
3175                 $paging_nav .= $cgi->a({-href => href(action=>$action)}, "HEAD");
3176         } else {
3177                 $paging_nav .= "HEAD";
3178         }
3179
3180         if ($page > 0) {
3181                 $paging_nav .= " &sdot; " .
3182                         $cgi->a({-href => href(-replay=>1, page=>$page-1),
3183                                  -accesskey => "p", -title => "Alt-p"}, "prev");
3184         } else {
3185                 $paging_nav .= " &sdot; prev";
3186         }
3187
3188         if ($has_next_link) {
3189                 $paging_nav .= " &sdot; " .
3190                         $cgi->a({-href => href(-replay=>1, page=>$page+1),
3191                                  -accesskey => "n", -title => "Alt-n"}, "next");
3192         } else {
3193                 $paging_nav .= " &sdot; next";
3194         }
3195
3196         return $paging_nav;
3197 }
3198
3199 ## ......................................................................
3200 ## functions printing or outputting HTML: div
3201
3202 sub git_print_header_div {
3203         my ($action, $title, $hash, $hash_base) = @_;
3204         my %args = ();
3205
3206         $args{'action'} = $action;
3207         $args{'hash'} = $hash if $hash;
3208         $args{'hash_base'} = $hash_base if $hash_base;
3209
3210         print "<div class=\"header\">\n" .
3211               $cgi->a({-href => href(%args), -class => "title"},
3212               $title ? $title : $action) .
3213               "\n</div>\n";
3214 }
3215
3216 sub git_print_authorship {
3217         my $co = shift;
3218
3219         my %ad = parse_date($co->{'author_epoch'}, $co->{'author_tz'});
3220         print "<div class=\"author_date\">" .
3221               esc_html($co->{'author_name'}) .
3222               " [$ad{'rfc2822'}";
3223         if ($ad{'hour_local'} < 6) {
3224                 printf(" (<span class=\"atnight\">%02d:%02d</span> %s)",
3225                        $ad{'hour_local'}, $ad{'minute_local'}, $ad{'tz_local'});
3226         } else {
3227                 printf(" (%02d:%02d %s)",
3228                        $ad{'hour_local'}, $ad{'minute_local'}, $ad{'tz_local'});
3229         }
3230         print "]</div>\n";
3231 }
3232
3233 sub git_print_page_path {
3234         my $name = shift;
3235         my $type = shift;
3236         my $hb = shift;
3237
3238
3239         print "<div class=\"page_path\">";
3240         print $cgi->a({-href => href(action=>"tree", hash_base=>$hb),
3241                       -title => 'tree root'}, to_utf8("[$project]"));
3242         print " / ";
3243         if (defined $name) {
3244                 my @dirname = split '/', $name;
3245                 my $basename = pop @dirname;
3246                 my $fullname = '';
3247
3248                 foreach my $dir (@dirname) {
3249                         $fullname .= ($fullname ? '/' : '') . $dir;
3250                         print $cgi->a({-href => href(action=>"tree", file_name=>$fullname,
3251                                                      hash_base=>$hb),
3252                                       -title => $fullname}, esc_path($dir));
3253                         print " / ";
3254                 }
3255                 if (defined $type && $type eq 'blob') {
3256                         print $cgi->a({-href => href(action=>"blob_plain", file_name=>$file_name,
3257                                                      hash_base=>$hb),
3258                                       -title => $name}, esc_path($basename));
3259                 } elsif (defined $type && $type eq 'tree') {
3260                         print $cgi->a({-href => href(action=>"tree", file_name=>$file_name,
3261                                                      hash_base=>$hb),
3262                                       -title => $name}, esc_path($basename));
3263                         print " / ";
3264                 } else {
3265                         print esc_path($basename);
3266                 }
3267         }
3268         print "<br/></div>\n";
3269 }
3270
3271 sub git_print_log {
3272         my $log = shift;
3273         my %opts = @_;
3274
3275         if ($opts{'-remove_title'}) {
3276                 # remove title, i.e. first line of log
3277                 shift @$log;
3278         }
3279         # remove leading empty lines
3280         while (defined $log->[0] && $log->[0] eq "") {
3281                 shift @$log;
3282         }
3283
3284         # print log
3285         my $signoff = 0;
3286         my $empty = 0;
3287         foreach my $line (@$log) {
3288                 if ($line =~ m/^ *(signed[ \-]off[ \-]by[ :]|acked[ \-]by[ :]|cc[ :])/i) {
3289                         $signoff = 1;
3290                         $empty = 0;
3291                         if (! $opts{'-remove_signoff'}) {
3292                                 print "<span class=\"signoff\">" . esc_html($line) . "</span><br/>\n";
3293                                 next;
3294                         } else {
3295                                 # remove signoff lines
3296                                 next;
3297                         }
3298                 } else {
3299                         $signoff = 0;
3300                 }
3301
3302                 # print only one empty line
3303                 # do not print empty line after signoff
3304                 if ($line eq "") {
3305                         next if ($empty || $signoff);
3306                         $empty = 1;
3307                 } else {
3308                         $empty = 0;
3309                 }
3310
3311                 print format_log_line_html($line) . "<br/>\n";
3312         }
3313
3314         if ($opts{'-final_empty_line'}) {
3315                 # end with single empty line
3316                 print "<br/>\n" unless $empty;
3317         }
3318 }
3319
3320 # return link target (what link points to)
3321 sub git_get_link_target {
3322         my $hash = shift;
3323         my $link_target;
3324
3325         # read link
3326         open my $fd, "-|", git_cmd(), "cat-file", "blob", $hash
3327                 or return;
3328         {
3329                 local $/ = undef;
3330                 $link_target = <$fd>;
3331         }
3332         close $fd
3333                 or return;
3334
3335         return $link_target;
3336 }
3337
3338 # given link target, and the directory (basedir) the link is in,
3339 # return target of link relative to top directory (top tree);
3340 # return undef if it is not possible (including absolute links).
3341 sub normalize_link_target {
3342         my ($link_target, $basedir) = @_;
3343
3344         # absolute symlinks (beginning with '/') cannot be normalized
3345         return if (substr($link_target, 0, 1) eq '/');
3346
3347         # normalize link target to path from top (root) tree (dir)
3348         my $path;
3349         if ($basedir) {
3350                 $path = $basedir . '/' . $link_target;
3351         } else {
3352                 # we are in top (root) tree (dir)
3353                 $path = $link_target;
3354         }
3355
3356         # remove //, /./, and /../
3357         my @path_parts;
3358         foreach my $part (split('/', $path)) {
3359                 # discard '.' and ''
3360                 next if (!$part || $part eq '.');
3361                 # handle '..'
3362                 if ($part eq '..') {
3363                         if (@path_parts) {
3364                                 pop @path_parts;
3365                         } else {
3366                                 # link leads outside repository (outside top dir)
3367                                 return;
3368                         }
3369                 } else {
3370                         push @path_parts, $part;
3371                 }
3372         }
3373         $path = join('/', @path_parts);
3374
3375         return $path;
3376 }
3377
3378 # print tree entry (row of git_tree), but without encompassing <tr> element
3379 sub git_print_tree_entry {
3380         my ($t, $basedir, $hash_base, $have_blame) = @_;
3381
3382         my %base_key = ();
3383         $base_key{'hash_base'} = $hash_base if defined $hash_base;
3384
3385         # The format of a table row is: mode list link.  Where mode is
3386         # the mode of the entry, list is the name of the entry, an href,
3387         # and link is the action links of the entry.
3388
3389         print "<td class=\"mode\">" . mode_str($t->{'mode'}) . "</td>\n";
3390         if ($t->{'type'} eq "blob") {
3391                 print "<td class=\"list\">" .
3392                         $cgi->a({-href => href(action=>"blob", hash=>$t->{'hash'},
3393                                                file_name=>"$basedir$t->{'name'}", %base_key),
3394                                 -class => "list"}, esc_path($t->{'name'}));
3395                 if (S_ISLNK(oct $t->{'mode'})) {
3396                         my $link_target = git_get_link_target($t->{'hash'});
3397                         if ($link_target) {
3398                                 my $norm_target = normalize_link_target($link_target, $basedir);
3399                                 if (defined $norm_target) {
3400                                         print " -> " .
3401                                               $cgi->a({-href => href(action=>"object", hash_base=>$hash_base,
3402                                                                      file_name=>$norm_target),
3403                                                        -title => $norm_target}, esc_path($link_target));
3404                                 } else {
3405                                         print " -> " . esc_path($link_target);
3406                                 }
3407                         }
3408                 }
3409                 print "</td>\n";
3410                 print "<td class=\"link\">";
3411                 print $cgi->a({-href => href(action=>"blob", hash=>$t->{'hash'},
3412                                              file_name=>"$basedir$t->{'name'}", %base_key)},
3413                               "blob");
3414                 if ($have_blame) {
3415                         print " | " .
3416                               $cgi->a({-href => href(action=>"blame", hash=>$t->{'hash'},
3417                                                      file_name=>"$basedir$t->{'name'}", %base_key)},
3418                                       "blame");
3419                 }
3420                 if (defined $hash_base) {
3421                         print " | " .
3422                               $cgi->a({-href => href(action=>"history", hash_base=>$hash_base,
3423                                                      hash=>$t->{'hash'}, file_name=>"$basedir$t->{'name'}")},
3424                                       "history");
3425                 }
3426                 print " | " .
3427                         $cgi->a({-href => href(action=>"blob_plain", hash_base=>$hash_base,
3428                                                file_name=>"$basedir$t->{'name'}")},
3429                                 "raw");
3430                 print "</td>\n";
3431
3432         } elsif ($t->{'type'} eq "tree") {
3433                 print "<td class=\"list\">";
3434                 print $cgi->a({-href => href(action=>"tree", hash=>$t->{'hash'},
3435                                              file_name=>"$basedir$t->{'name'}", %base_key)},
3436                               esc_path($t->{'name'}));
3437                 print "</td>\n";
3438                 print "<td class=\"link\">";
3439                 print $cgi->a({-href => href(action=>"tree", hash=>$t->{'hash'},
3440                                              file_name=>"$basedir$t->{'name'}", %base_key)},
3441                               "tree");
3442                 if (defined $hash_base) {
3443                         print " | " .
3444                               $cgi->a({-href => href(action=>"history", hash_base=>$hash_base,
3445                                                      file_name=>"$basedir$t->{'name'}")},
3446                                       "history");
3447                 }
3448                 print "</td>\n";
3449         } else {
3450                 # unknown object: we can only present history for it
3451                 # (this includes 'commit' object, i.e. submodule support)
3452                 print "<td class=\"list\">" .
3453                       esc_path($t->{'name'}) .
3454                       "</td>\n";
3455                 print "<td class=\"link\">";
3456                 if (defined $hash_base) {
3457                         print $cgi->a({-href => href(action=>"history",
3458                                                      hash_base=>$hash_base,
3459                                                      file_name=>"$basedir$t->{'name'}")},
3460                                       "history");
3461                 }
3462                 print "</td>\n";
3463         }
3464 }
3465
3466 ## ......................................................................
3467 ## functions printing large fragments of HTML
3468
3469 # get pre-image filenames for merge (combined) diff
3470 sub fill_from_file_info {
3471         my ($diff, @parents) = @_;
3472
3473         $diff->{'from_file'} = [ ];
3474         $diff->{'from_file'}[$diff->{'nparents'} - 1] = undef;
3475         for (my $i = 0; $i < $diff->{'nparents'}; $i++) {
3476                 if ($diff->{'status'}[$i] eq 'R' ||
3477                     $diff->{'status'}[$i] eq 'C') {
3478                         $diff->{'from_file'}[$i] =
3479                                 git_get_path_by_hash($parents[$i], $diff->{'from_id'}[$i]);
3480                 }
3481         }
3482
3483         return $diff;
3484 }
3485
3486 # is current raw difftree line of file deletion
3487 sub is_deleted {
3488         my $diffinfo = shift;
3489
3490         return $diffinfo->{'to_id'} eq ('0' x 40);
3491 }
3492
3493 # does patch correspond to [previous] difftree raw line
3494 # $diffinfo  - hashref of parsed raw diff format
3495 # $patchinfo - hashref of parsed patch diff format
3496 #              (the same keys as in $diffinfo)
3497 sub is_patch_split {
3498         my ($diffinfo, $patchinfo) = @_;
3499
3500         return defined $diffinfo && defined $patchinfo
3501                 && $diffinfo->{'to_file'} eq $patchinfo->{'to_file'};
3502 }
3503
3504
3505 sub git_difftree_body {
3506         my ($difftree, $hash, @parents) = @_;
3507         my ($parent) = $parents[0];
3508         my $have_blame = gitweb_check_feature('blame');
3509         print "<div class=\"list_head\">\n";
3510         if ($#{$difftree} > 10) {
3511                 print(($#{$difftree} + 1) . " files changed:\n");
3512         }
3513         print "</div>\n";
3514
3515         print "<table class=\"" .
3516               (@parents > 1 ? "combined " : "") .
3517               "diff_tree\">\n";
3518
3519         # header only for combined diff in 'commitdiff' view
3520         my $has_header = @$difftree && @parents > 1 && $action eq 'commitdiff';
3521         if ($has_header) {
3522                 # table header
3523                 print "<thead><tr>\n" .
3524                        "<th></th><th></th>\n"; # filename, patchN link
3525                 for (my $i = 0; $i < @parents; $i++) {
3526                         my $par = $parents[$i];
3527                         print "<th>" .
3528                               $cgi->a({-href => href(action=>"commitdiff",
3529                                                      hash=>$hash, hash_parent=>$par),
3530                                        -title => 'commitdiff to parent number ' .
3531                                                   ($i+1) . ': ' . substr($par,0,7)},
3532                                       $i+1) .
3533                               "&nbsp;</th>\n";
3534                 }
3535                 print "</tr></thead>\n<tbody>\n";
3536         }
3537
3538         my $alternate = 1;
3539         my $patchno = 0;
3540         foreach my $line (@{$difftree}) {
3541                 my $diff = parsed_difftree_line($line);
3542
3543                 if ($alternate) {
3544                         print "<tr class=\"dark\">\n";
3545                 } else {
3546                         print "<tr class=\"light\">\n";
3547                 }
3548                 $alternate ^= 1;
3549
3550                 if (exists $diff->{'nparents'}) { # combined diff
3551
3552                         fill_from_file_info($diff, @parents)
3553                                 unless exists $diff->{'from_file'};
3554
3555                         if (!is_deleted($diff)) {
3556                                 # file exists in the result (child) commit
3557                                 print "<td>" .
3558                                       $cgi->a({-href => href(action=>"blob", hash=>$diff->{'to_id'},
3559                                                              file_name=>$diff->{'to_file'},
3560                                                              hash_base=>$hash),
3561                                               -class => "list"}, esc_path($diff->{'to_file'})) .
3562                                       "</td>\n";
3563                         } else {
3564                                 print "<td>" .
3565                                       esc_path($diff->{'to_file'}) .
3566                                       "</td>\n";
3567                         }
3568
3569                         if ($action eq 'commitdiff') {
3570                                 # link to patch
3571                                 $patchno++;
3572                                 print "<td class=\"link\">" .
3573                                       $cgi->a({-href => "#patch$patchno"}, "patch") .
3574                                       " | " .
3575                                       "</td>\n";
3576                         }
3577
3578                         my $has_history = 0;
3579                         my $not_deleted = 0;
3580                         for (my $i = 0; $i < $diff->{'nparents'}; $i++) {
3581                                 my $hash_parent = $parents[$i];
3582                                 my $from_hash = $diff->{'from_id'}[$i];
3583                                 my $from_path = $diff->{'from_file'}[$i];
3584                                 my $status = $diff->{'status'}[$i];
3585
3586                                 $has_history ||= ($status ne 'A');
3587                                 $not_deleted ||= ($status ne 'D');
3588
3589                                 if ($status eq 'A') {
3590                                         print "<td  class=\"link\" align=\"right\"> | </td>\n";
3591                                 } elsif ($status eq 'D') {
3592                                         print "<td class=\"link\">" .
3593                                               $cgi->a({-href => href(action=>"blob",
3594                                                                      hash_base=>$hash,
3595                                                                      hash=>$from_hash,
3596                                                                      file_name=>$from_path)},
3597                                                       "blob" . ($i+1)) .
3598                                               " | </td>\n";
3599                                 } else {
3600                                         if ($diff->{'to_id'} eq $from_hash) {
3601                                                 print "<td class=\"link nochange\">";
3602                                         } else {
3603                                                 print "<td class=\"link\">";
3604                                         }
3605                                         print $cgi->a({-href => href(action=>"blobdiff",
3606                                                                      hash=>$diff->{'to_id'},
3607                                                                      hash_parent=>$from_hash,
3608                                                                      hash_base=>$hash,
3609                                                                      hash_parent_base=>$hash_parent,
3610                                                                      file_name=>$diff->{'to_file'},
3611                                                                      file_parent=>$from_path)},
3612                                                       "diff" . ($i+1)) .
3613                                               " | </td>\n";
3614                                 }
3615                         }
3616
3617                         print "<td class=\"link\">";
3618                         if ($not_deleted) {
3619                                 print $cgi->a({-href => href(action=>"blob",
3620                                                              hash=>$diff->{'to_id'},
3621                                                              file_name=>$diff->{'to_file'},
3622                                                              hash_base=>$hash)},
3623                                               "blob");
3624                                 print " | " if ($has_history);
3625                         }
3626                         if ($has_history) {
3627                                 print $cgi->a({-href => href(action=>"history",
3628                                                              file_name=>$diff->{'to_file'},
3629                                                              hash_base=>$hash)},
3630                                               "history");
3631                         }
3632                         print "</td>\n";
3633
3634                         print "</tr>\n";
3635                         next; # instead of 'else' clause, to avoid extra indent
3636                 }
3637                 # else ordinary diff
3638
3639                 my ($to_mode_oct, $to_mode_str, $to_file_type);
3640                 my ($from_mode_oct, $from_mode_str, $from_file_type);
3641                 if ($diff->{'to_mode'} ne ('0' x 6)) {
3642                         $to_mode_oct = oct $diff->{'to_mode'};
3643                         if (S_ISREG($to_mode_oct)) { # only for regular file
3644                                 $to_mode_str = sprintf("%04o", $to_mode_oct & 0777); # permission bits
3645                         }
3646                         $to_file_type = file_type($diff->{'to_mode'});
3647                 }
3648                 if ($diff->{'from_mode'} ne ('0' x 6)) {
3649                         $from_mode_oct = oct $diff->{'from_mode'};
3650                         if (S_ISREG($to_mode_oct)) { # only for regular file
3651                                 $from_mode_str = sprintf("%04o", $from_mode_oct & 0777); # permission bits
3652                         }
3653                         $from_file_type = file_type($diff->{'from_mode'});
3654                 }
3655
3656                 if ($diff->{'status'} eq "A") { # created
3657                         my $mode_chng = "<span class=\"file_status new\">[new $to_file_type";
3658                         $mode_chng   .= " with mode: $to_mode_str" if $to_mode_str;
3659                         $mode_chng   .= "]</span>";
3660                         print "<td>";
3661                         print $cgi->a({-href => href(action=>"blob", hash=>$diff->{'to_id'},
3662                                                      hash_base=>$hash, file_name=>$diff->{'file'}),
3663                                       -class => "list"}, esc_path($diff->{'file'}));
3664                         print "</td>\n";
3665                         print "<td>$mode_chng</td>\n";
3666                         print "<td class=\"link\">";
3667                         if ($action eq 'commitdiff') {
3668                                 # link to patch
3669                                 $patchno++;
3670                                 print $cgi->a({-href => "#patch$patchno"}, "patch");
3671                                 print " | ";
3672                         }
3673                         print $cgi->a({-href => href(action=>"blob", hash=>$diff->{'to_id'},
3674                                                      hash_base=>$hash, file_name=>$diff->{'file'})},
3675                                       "blob");
3676                         print "</td>\n";
3677
3678                 } elsif ($diff->{'status'} eq "D") { # deleted
3679                         my $mode_chng = "<span class=\"file_status deleted\">[deleted $from_file_type]</span>";
3680                         print "<td>";
3681                         print $cgi->a({-href => href(action=>"blob", hash=>$diff->{'from_id'},
3682                                                      hash_base=>$parent, file_name=>$diff->{'file'}),
3683                                        -class => "list"}, esc_path($diff->{'file'}));
3684                         print "</td>\n";
3685                         print "<td>$mode_chng</td>\n";
3686                         print "<td class=\"link\">";
3687                         if ($action eq 'commitdiff') {
3688                                 # link to patch
3689                                 $patchno++;
3690                                 print $cgi->a({-href => "#patch$patchno"}, "patch");
3691                                 print " | ";
3692                         }
3693                         print $cgi->a({-href => href(action=>"blob", hash=>$diff->{'from_id'},
3694                                                      hash_base=>$parent, file_name=>$diff->{'file'})},
3695                                       "blob") . " | ";
3696                         if ($have_blame) {
3697                                 print $cgi->a({-href => href(action=>"blame", hash_base=>$parent,
3698                                                              file_name=>$diff->{'file'})},
3699                                               "blame") . " | ";
3700                         }
3701                         print $cgi->a({-href => href(action=>"history", hash_base=>$parent,
3702                                                      file_name=>$diff->{'file'})},
3703                                       "history");
3704                         print "</td>\n";
3705
3706                 } elsif ($diff->{'status'} eq "M" || $diff->{'status'} eq "T") { # modified, or type changed
3707                         my $mode_chnge = "";
3708                         if ($diff->{'from_mode'} != $diff->{'to_mode'}) {
3709                                 $mode_chnge = "<span class=\"file_status mode_chnge\">[changed";
3710                                 if ($from_file_type ne $to_file_type) {
3711                                         $mode_chnge .= " from $from_file_type to $to_file_type";
3712                                 }
3713                                 if (($from_mode_oct & 0777) != ($to_mode_oct & 0777)) {
3714                                         if ($from_mode_str && $to_mode_str) {
3715                                                 $mode_chnge .= " mode: $from_mode_str->$to_mode_str";
3716                                         } elsif ($to_mode_str) {
3717                                                 $mode_chnge .= " mode: $to_mode_str";
3718                                         }
3719                                 }
3720                                 $mode_chnge .= "]</span>\n";
3721                         }
3722                         print "<td>";
3723                         print $cgi->a({-href => href(action=>"blob", hash=>$diff->{'to_id'},
3724                                                      hash_base=>$hash, file_name=>$diff->{'file'}),
3725                                       -class => "list"}, esc_path($diff->{'file'}));
3726                         print "</td>\n";
3727                         print "<td>$mode_chnge</td>\n";
3728                         print "<td class=\"link\">";
3729                         if ($action eq 'commitdiff') {
3730                                 # link to patch
3731                                 $patchno++;
3732                                 print $cgi->a({-href => "#patch$patchno"}, "patch") .
3733                                       " | ";
3734                         } elsif ($diff->{'to_id'} ne $diff->{'from_id'}) {
3735                                 # "commit" view and modified file (not onlu mode changed)
3736                                 print $cgi->a({-href => href(action=>"blobdiff",
3737                                                              hash=>$diff->{'to_id'}, hash_parent=>$diff->{'from_id'},
3738                                                              hash_base=>$hash, hash_parent_base=>$parent,
3739                                                              file_name=>$diff->{'file'})},
3740                                               "diff") .
3741                                       " | ";
3742                         }
3743                         print $cgi->a({-href => href(action=>"blob", hash=>$diff->{'to_id'},
3744                                                      hash_base=>$hash, file_name=>$diff->{'file'})},
3745                                        "blob") . " | ";
3746                         if ($have_blame) {
3747                                 print $cgi->a({-href => href(action=>"blame", hash_base=>$hash,
3748                                                              file_name=>$diff->{'file'})},
3749                                               "blame") . " | ";
3750                         }
3751                         print $cgi->a({-href => href(action=>"history", hash_base=>$hash,
3752                                                      file_name=>$diff->{'file'})},
3753                                       "history");
3754                         print "</td>\n";
3755
3756                 } elsif ($diff->{'status'} eq "R" || $diff->{'status'} eq "C") { # renamed or copied
3757                         my %status_name = ('R' => 'moved', 'C' => 'copied');
3758                         my $nstatus = $status_name{$diff->{'status'}};
3759                         my $mode_chng = "";
3760                         if ($diff->{'from_mode'} != $diff->{'to_mode'}) {
3761                                 # mode also for directories, so we cannot use $to_mode_str
3762                                 $mode_chng = sprintf(", mode: %04o", $to_mode_oct & 0777);
3763                         }
3764                         print "<td>" .
3765                               $cgi->a({-href => href(action=>"blob", hash_base=>$hash,
3766                                                      hash=>$diff->{'to_id'}, file_name=>$diff->{'to_file'}),
3767                                       -class => "list"}, esc_path($diff->{'to_file'})) . "</td>\n" .
3768                               "<td><span class=\"file_status $nstatus\">[$nstatus from " .
3769                               $cgi->a({-href => href(action=>"blob", hash_base=>$parent,
3770                                                      hash=>$diff->{'from_id'}, file_name=>$diff->{'from_file'}),
3771                                       -class => "list"}, esc_path($diff->{'from_file'})) .
3772                               " with " . (int $diff->{'similarity'}) . "% similarity$mode_chng]</span></td>\n" .
3773                               "<td class=\"link\">";
3774                         if ($action eq 'commitdiff') {
3775                                 # link to patch
3776                                 $patchno++;
3777                                 print $cgi->a({-href => "#patch$patchno"}, "patch") .
3778                                       " | ";
3779                         } elsif ($diff->{'to_id'} ne $diff->{'from_id'}) {
3780                                 # "commit" view and modified file (not only pure rename or copy)
3781                                 print $cgi->a({-href => href(action=>"blobdiff",
3782                                                              hash=>$diff->{'to_id'}, hash_parent=>$diff->{'from_id'},
3783                                                              hash_base=>$hash, hash_parent_base=>$parent,
3784                                                              file_name=>$diff->{'to_file'}, file_parent=>$diff->{'from_file'})},
3785                                               "diff") .
3786                                       " | ";
3787                         }
3788                         print $cgi->a({-href => href(action=>"blob", hash=>$diff->{'to_id'},
3789                                                      hash_base=>$parent, file_name=>$diff->{'to_file'})},
3790                                       "blob") . " | ";
3791                         if ($have_blame) {
3792                                 print $cgi->a({-href => href(action=>"blame", hash_base=>$hash,
3793                                                              file_name=>$diff->{'to_file'})},
3794                                               "blame") . " | ";
3795                         }
3796                         print $cgi->a({-href => href(action=>"history", hash_base=>$hash,
3797                                                     file_name=>$diff->{'to_file'})},
3798                                       "history");
3799                         print "</td>\n";
3800
3801                 } # we should not encounter Unmerged (U) or Unknown (X) status
3802                 print "</tr>\n";
3803         }
3804         print "</tbody>" if $has_header;
3805         print "</table>\n";
3806 }
3807
3808 sub git_patchset_body {
3809         my ($fd, $difftree, $hash, @hash_parents) = @_;
3810         my ($hash_parent) = $hash_parents[0];
3811
3812         my $is_combined = (@hash_parents > 1);
3813         my $patch_idx = 0;
3814         my $patch_number = 0;
3815         my $patch_line;
3816         my $diffinfo;
3817         my $to_name;
3818         my (%from, %to);
3819
3820         print "<div class=\"patchset\">\n";
3821
3822         # skip to first patch
3823         while ($patch_line = <$fd>) {
3824                 chomp $patch_line;
3825
3826                 last if ($patch_line =~ m/^diff /);
3827         }
3828
3829  PATCH:
3830         while ($patch_line) {
3831
3832                 # parse "git diff" header line
3833                 if ($patch_line =~ m/^diff --git (\"(?:[^\\\"]*(?:\\.[^\\\"]*)*)\"|[^ "]*) (.*)$/) {
3834                         # $1 is from_name, which we do not use
3835                         $to_name = unquote($2);
3836                         $to_name =~ s!^b/!!;
3837                 } elsif ($patch_line =~ m/^diff --(cc|combined) ("?.*"?)$/) {
3838                         # $1 is 'cc' or 'combined', which we do not use
3839                         $to_name = unquote($2);
3840                 } else {
3841                         $to_name = undef;
3842                 }
3843
3844                 # check if current patch belong to current raw line
3845                 # and parse raw git-diff line if needed
3846                 if (is_patch_split($diffinfo, { 'to_file' => $to_name })) {
3847                         # this is continuation of a split patch
3848                         print "<div class=\"patch cont\">\n";
3849                 } else {
3850                         # advance raw git-diff output if needed
3851                         $patch_idx++ if defined $diffinfo;
3852
3853                         # read and prepare patch information
3854                         $diffinfo = parsed_difftree_line($difftree->[$patch_idx]);
3855
3856                         # compact combined diff output can have some patches skipped
3857                         # find which patch (using pathname of result) we are at now;
3858                         if ($is_combined) {
3859                                 while ($to_name ne $diffinfo->{'to_file'}) {
3860                                         print "<div class=\"patch\" id=\"patch". ($patch_idx+1) ."\">\n" .
3861                                               format_diff_cc_simplified($diffinfo, @hash_parents) .
3862                                               "</div>\n";  # class="patch"
3863
3864                                         $patch_idx++;
3865                                         $patch_number++;
3866
3867                                         last if $patch_idx > $#$difftree;
3868                                         $diffinfo = parsed_difftree_line($difftree->[$patch_idx]);
3869                                 }
3870                         }
3871
3872                         # modifies %from, %to hashes
3873                         parse_from_to_diffinfo($diffinfo, \%from, \%to, @hash_parents);
3874
3875                         # this is first patch for raw difftree line with $patch_idx index
3876                         # we index @$difftree array from 0, but number patches from 1
3877                         print "<div class=\"patch\" id=\"patch". ($patch_idx+1) ."\">\n";
3878                 }
3879
3880                 # git diff header
3881                 #assert($patch_line =~ m/^diff /) if DEBUG;
3882                 #assert($patch_line !~ m!$/$!) if DEBUG; # is chomp-ed
3883                 $patch_number++;
3884                 # print "git diff" header
3885                 print format_git_diff_header_line($patch_line, $diffinfo,
3886                                                   \%from, \%to);
3887
3888                 # print extended diff header
3889                 print "<div class=\"diff extended_header\">\n";
3890         EXTENDED_HEADER:
3891                 while ($patch_line = <$fd>) {
3892                         chomp $patch_line;
3893
3894                         last EXTENDED_HEADER if ($patch_line =~ m/^--- |^diff /);
3895
3896                         print format_extended_diff_header_line($patch_line, $diffinfo,
3897                                                                \%from, \%to);
3898                 }
3899                 print "</div>\n"; # class="diff extended_header"
3900
3901                 # from-file/to-file diff header
3902                 if (! $patch_line) {
3903                         print "</div>\n"; # class="patch"
3904                         last PATCH;
3905                 }
3906                 next PATCH if ($patch_line =~ m/^diff /);
3907                 #assert($patch_line =~ m/^---/) if DEBUG;
3908
3909                 my $last_patch_line = $patch_line;
3910                 $patch_line = <$fd>;
3911                 chomp $patch_line;
3912                 #assert($patch_line =~ m/^\+\+\+/) if DEBUG;
3913
3914                 print format_diff_from_to_header($last_patch_line, $patch_line,
3915                                                  $diffinfo, \%from, \%to,
3916                                                  @hash_parents);
3917
3918                 # the patch itself
3919         LINE:
3920                 while ($patch_line = <$fd>) {
3921                         chomp $patch_line;
3922
3923                         next PATCH if ($patch_line =~ m/^diff /);
3924
3925                         print format_diff_line($patch_line, \%from, \%to);
3926                 }
3927
3928         } continue {
3929                 print "</div>\n"; # class="patch"
3930         }
3931
3932         # for compact combined (--cc) format, with chunk and patch simpliciaction
3933         # patchset might be empty, but there might be unprocessed raw lines
3934         for (++$patch_idx if $patch_number > 0;
3935              $patch_idx < @$difftree;
3936              ++$patch_idx) {
3937                 # read and prepare patch information
3938                 $diffinfo = parsed_difftree_line($difftree->[$patch_idx]);
3939
3940                 # generate anchor for "patch" links in difftree / whatchanged part
3941                 print "<div class=\"patch\" id=\"patch". ($patch_idx+1) ."\">\n" .
3942                       format_diff_cc_simplified($diffinfo, @hash_parents) .
3943                       "</div>\n";  # class="patch"
3944
3945                 $patch_number++;
3946         }
3947
3948         if ($patch_number == 0) {
3949                 if (@hash_parents > 1) {
3950                         print "<div class=\"diff nodifferences\">Trivial merge</div>\n";
3951                 } else {
3952                         print "<div class=\"diff nodifferences\">No differences found</div>\n";
3953                 }
3954         }
3955
3956         print "</div>\n"; # class="patchset"
3957 }
3958
3959 # . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
3960
3961 # fills project list info (age, description, owner, forks) for each
3962 # project in the list, removing invalid projects from returned list
3963 # NOTE: modifies $projlist, but does not remove entries from it
3964 sub fill_project_list_info {
3965         my ($projlist, $check_forks) = @_;
3966         my @projects;
3967
3968         my $show_ctags = gitweb_check_feature('ctags');
3969  PROJECT:
3970         foreach my $pr (@$projlist) {
3971                 my (@activity) = git_get_last_activity($pr->{'path'});
3972                 unless (@activity) {
3973                         next PROJECT;
3974                 }
3975                 ($pr->{'age'}, $pr->{'age_string'}) = @activity;
3976                 if (!defined $pr->{'descr'}) {
3977                         my $descr = git_get_project_description($pr->{'path'}) || "";
3978                         $descr = to_utf8($descr);
3979                         $pr->{'descr_long'} = $descr;
3980                         $pr->{'descr'} = chop_str($descr, $projects_list_description_width, 5);
3981                 }
3982                 if (!defined $pr->{'owner'}) {
3983                         $pr->{'owner'} = git_get_project_owner("$pr->{'path'}") || "";
3984                 }
3985                 if ($check_forks) {
3986                         my $pname = $pr->{'path'};
3987                         if (($pname =~ s/\.git$//) &&
3988                             ($pname !~ /\/$/) &&
3989                             (-d "$projectroot/$pname")) {
3990                                 $pr->{'forks'} = "-d $projectroot/$pname";
3991                         } else {
3992                                 $pr->{'forks'} = 0;
3993                         }
3994                 }
3995                 $show_ctags and $pr->{'ctags'} = git_get_project_ctags($pr->{'path'});
3996                 push @projects, $pr;
3997         }
3998
3999         return @projects;
4000 }
4001
4002 # print 'sort by' <th> element, generating 'sort by $name' replay link
4003 # if that order is not selected
4004 sub print_sort_th {
4005         my ($name, $order, $header) = @_;
4006         $header ||= ucfirst($name);
4007
4008         if ($order eq $name) {
4009                 print "<th>$header</th>\n";
4010         } else {
4011                 print "<th>" .
4012                       $cgi->a({-href => href(-replay=>1, order=>$name),
4013                                -class => "header"}, $header) .
4014                       "</th>\n";
4015         }
4016 }
4017
4018 sub git_project_list_body {
4019         # actually uses global variable $project
4020         my ($projlist, $order, $from, $to, $extra, $no_header) = @_;
4021
4022         my $check_forks = gitweb_check_feature('forks');
4023         my @projects = fill_project_list_info($projlist, $check_forks);
4024
4025         $order ||= $default_projects_order;
4026         $from = 0 unless defined $from;
4027         $to = $#projects if (!defined $to || $#projects < $to);
4028
4029         my %order_info = (
4030                 project => { key => 'path', type => 'str' },
4031                 descr => { key => 'descr_long', type => 'str' },
4032                 owner => { key => 'owner', type => 'str' },
4033                 age => { key => 'age', type => 'num' }
4034         );
4035         my $oi = $order_info{$order};
4036         if ($oi->{'type'} eq 'str') {
4037                 @projects = sort {$a->{$oi->{'key'}} cmp $b->{$oi->{'key'}}} @projects;
4038         } else {
4039                 @projects = sort {$a->{$oi->{'key'}} <=> $b->{$oi->{'key'}}} @projects;
4040         }
4041
4042         my $show_ctags = gitweb_check_feature('ctags');
4043         if ($show_ctags) {
4044                 my %ctags;
4045                 foreach my $p (@projects) {
4046                         foreach my $ct (keys %{$p->{'ctags'}}) {
4047                                 $ctags{$ct} += $p->{'ctags'}->{$ct};
4048                         }
4049                 }
4050                 my $cloud = git_populate_project_tagcloud(\%ctags);
4051                 print git_show_project_tagcloud($cloud, 64);
4052         }
4053
4054         print "<table class=\"project_list\">\n";
4055         unless ($no_header) {
4056                 print "<tr>\n";
4057                 if ($check_forks) {
4058                         print "<th></th>\n";
4059                 }
4060                 print_sort_th('project', $order, 'Project');
4061                 print_sort_th('descr', $order, 'Description');
4062                 print_sort_th('owner', $order, 'Owner');
4063                 print_sort_th('age', $order, 'Last Change');
4064                 print "<th></th>\n" . # for links
4065                       "</tr>\n";
4066         }
4067         my $alternate = 1;
4068         my $tagfilter = $cgi->param('by_tag');
4069         for (my $i = $from; $i <= $to; $i++) {
4070                 my $pr = $projects[$i];
4071
4072                 next if $tagfilter and $show_ctags and not grep { lc $_ eq lc $tagfilter } keys %{$pr->{'ctags'}};
4073                 next if $searchtext and not $pr->{'path'} =~ /$searchtext/
4074                         and not $pr->{'descr_long'} =~ /$searchtext/;
4075                 # Weed out forks or non-matching entries of search
4076                 if ($check_forks) {
4077                         my $forkbase = $project; $forkbase ||= ''; $forkbase =~ s#\.git$#/#;
4078                         $forkbase="^$forkbase" if $forkbase;
4079                         next if not $searchtext and not $tagfilter and $show_ctags
4080                                 and $pr->{'path'} =~ m#$forkbase.*/.*#; # regexp-safe
4081                 }
4082
4083                 if ($alternate) {
4084                         print "<tr class=\"dark\">\n";
4085                 } else {
4086                         print "<tr class=\"light\">\n";
4087                 }
4088                 $alternate ^= 1;
4089                 if ($check_forks) {
4090                         print "<td>";
4091                         if ($pr->{'forks'}) {
4092                                 print "<!-- $pr->{'forks'} -->\n";
4093                                 print $cgi->a({-href => href(project=>$pr->{'path'}, action=>"forks")}, "+");
4094                         }
4095                         print "</td>\n";
4096                 }
4097                 print "<td>" . $cgi->a({-href => href(project=>$pr->{'path'}, action=>"summary"),
4098                                         -class => "list"}, esc_html($pr->{'path'})) . "</td>\n" .
4099                       "<td>" . $cgi->a({-href => href(project=>$pr->{'path'}, action=>"summary"),
4100                                         -class => "list", -title => $pr->{'descr_long'}},
4101                                         esc_html($pr->{'descr'})) . "</td>\n" .
4102                       "<td><i>" . chop_and_escape_str($pr->{'owner'}, 15) . "</i></td>\n";
4103                 print "<td class=\"". age_class($pr->{'age'}) . "\">" .
4104                       (defined $pr->{'age_string'} ? $pr->{'age_string'} : "No commits") . "</td>\n" .
4105                       "<td class=\"link\">" .
4106                       $cgi->a({-href => href(project=>$pr->{'path'}, action=>"summary")}, "summary")   . " | " .
4107                       $cgi->a({-href => href(project=>$pr->{'path'}, action=>"shortlog")}, "shortlog") . " | " .
4108                       $cgi->a({-href => href(project=>$pr->{'path'}, action=>"log")}, "log") . " | " .
4109                       $cgi->a({-href => href(project=>$pr->{'path'}, action=>"tree")}, "tree") .
4110                       ($pr->{'forks'} ? " | " . $cgi->a({-href => href(project=>$pr->{'path'}, action=>"forks")}, "forks") : '') .
4111                       "</td>\n" .
4112                       "</tr>\n";
4113         }
4114         if (defined $extra) {
4115                 print "<tr>\n";
4116                 if ($check_forks) {
4117                         print "<td></td>\n";
4118                 }
4119                 print "<td colspan=\"5\">$extra</td>\n" .
4120                       "</tr>\n";
4121         }
4122         print "</table>\n";
4123 }
4124
4125 sub git_shortlog_body {
4126         # uses global variable $project
4127         my ($commitlist, $from, $to, $refs, $extra) = @_;
4128
4129         $from = 0 unless defined $from;
4130         $to = $#{$commitlist} if (!defined $to || $#{$commitlist} < $to);
4131
4132         print "<table class=\"shortlog\">\n";
4133         my $alternate = 1;
4134         for (my $i = $from; $i <= $to; $i++) {
4135                 my %co = %{$commitlist->[$i]};
4136                 my $commit = $co{'id'};
4137                 my $ref = format_ref_marker($refs, $commit);
4138                 if ($alternate) {
4139                         print "<tr class=\"dark\">\n";
4140                 } else {
4141                         print "<tr class=\"light\">\n";
4142                 }
4143                 $alternate ^= 1;
4144                 my $author = chop_and_escape_str($co{'author_name'}, 10);
4145                 # git_summary() used print "<td><i>$co{'age_string'}</i></td>\n" .
4146                 print "<td title=\"$co{'age_string_age'}\"><i>$co{'age_string_date'}</i></td>\n" .
4147                       "<td><i>" . $author . "</i></td>\n" .
4148                       "<td>";
4149                 print format_subject_html($co{'title'}, $co{'title_short'},
4150                                           href(action=>"commit", hash=>$commit), $ref);
4151                 print "</td>\n" .
4152                       "<td class=\"link\">" .
4153                       $cgi->a({-href => href(action=>"commit", hash=>$commit)}, "commit") . " | " .
4154                       $cgi->a({-href => href(action=>"commitdiff", hash=>$commit)}, "commitdiff") . " | " .
4155                       $cgi->a({-href => href(action=>"tree", hash=>$commit, hash_base=>$commit)}, "tree");
4156                 my $snapshot_links = format_snapshot_links($commit);
4157                 if (defined $snapshot_links) {
4158                         print " | " . $snapshot_links;
4159                 }
4160                 print "</td>\n" .
4161                       "</tr>\n";
4162         }
4163         if (defined $extra) {
4164                 print "<tr>\n" .
4165                       "<td colspan=\"4\">$extra</td>\n" .
4166                       "</tr>\n";
4167         }
4168         print "</table>\n";
4169 }
4170
4171 sub git_history_body {
4172         # Warning: assumes constant type (blob or tree) during history
4173         my ($commitlist, $from, $to, $refs, $hash_base, $ftype, $extra) = @_;
4174
4175         $from = 0 unless defined $from;
4176         $to = $#{$commitlist} unless (defined $to && $to <= $#{$commitlist});
4177
4178         print "<table class=\"history\">\n";
4179         my $alternate = 1;
4180         for (my $i = $from; $i <= $to; $i++) {
4181                 my %co = %{$commitlist->[$i]};
4182                 if (!%co) {
4183                         next;
4184                 }
4185                 my $commit = $co{'id'};
4186
4187                 my $ref = format_ref_marker($refs, $commit);
4188
4189                 if ($alternate) {
4190                         print "<tr class=\"dark\">\n";
4191                 } else {
4192                         print "<tr class=\"light\">\n";
4193                 }
4194                 $alternate ^= 1;
4195         # shortlog uses      chop_str($co{'author_name'}, 10)
4196                 my $author = chop_and_escape_str($co{'author_name'}, 15, 3);
4197                 print "<td title=\"$co{'age_string_age'}\"><i>$co{'age_string_date'}</i></td>\n" .
4198                       "<td><i>" . $author . "</i></td>\n" .
4199                       "<td>";
4200                 # originally git_history used chop_str($co{'title'}, 50)
4201                 print format_subject_html($co{'title'}, $co{'title_short'},
4202                                           href(action=>"commit", hash=>$commit), $ref);
4203                 print "</td>\n" .
4204                       "<td class=\"link\">" .
4205                       $cgi->a({-href => href(action=>$ftype, hash_base=>$commit, file_name=>$file_name)}, $ftype) . " | " .
4206                       $cgi->a({-href => href(action=>"commitdiff", hash=>$commit)}, "commitdiff");
4207
4208                 if ($ftype eq 'blob') {
4209                         my $blob_current = git_get_hash_by_path($hash_base, $file_name);
4210                         my $blob_parent  = git_get_hash_by_path($commit, $file_name);
4211                         if (defined $blob_current && defined $blob_parent &&
4212                                         $blob_current ne $blob_parent) {
4213                                 print " | " .
4214                                         $cgi->a({-href => href(action=>"blobdiff",
4215                                                                hash=>$blob_current, hash_parent=>$blob_parent,
4216                                                                hash_base=>$hash_base, hash_parent_base=>$commit,
4217                                                                file_name=>$file_name)},
4218                                                 "diff to current");
4219                         }
4220                 }
4221                 print "</td>\n" .
4222                       "</tr>\n";
4223         }
4224         if (defined $extra) {
4225                 print "<tr>\n" .
4226                       "<td colspan=\"4\">$extra</td>\n" .
4227                       "</tr>\n";
4228         }
4229         print "</table>\n";
4230 }
4231
4232 sub git_tags_body {
4233         # uses global variable $project
4234         my ($taglist, $from, $to, $extra) = @_;
4235         $from = 0 unless defined $from;
4236         $to = $#{$taglist} if (!defined $to || $#{$taglist} < $to);
4237
4238         print "<table class=\"tags\">\n";
4239         my $alternate = 1;
4240         for (my $i = $from; $i <= $to; $i++) {
4241                 my $entry = $taglist->[$i];
4242                 my %tag = %$entry;
4243                 my $comment = $tag{'subject'};
4244                 my $comment_short;
4245                 if (defined $comment) {
4246                         $comment_short = chop_str($comment, 30, 5);
4247                 }
4248                 if ($alternate) {
4249                         print "<tr class=\"dark\">\n";
4250                 } else {
4251                         print "<tr class=\"light\">\n";
4252                 }
4253                 $alternate ^= 1;
4254                 if (defined $tag{'age'}) {
4255                         print "<td><i>$tag{'age'}</i></td>\n";
4256                 } else {
4257                         print "<td></td>\n";
4258                 }
4259                 print "<td>" .
4260                       $cgi->a({-href => href(action=>$tag{'reftype'}, hash=>$tag{'refid'}),
4261                                -class => "list name"}, esc_html($tag{'name'})) .
4262                       "</td>\n" .
4263                       "<td>";
4264                 if (defined $comment) {
4265                         print format_subject_html($comment, $comment_short,
4266                                                   href(action=>"tag", hash=>$tag{'id'}));
4267                 }
4268                 print "</td>\n" .
4269                       "<td class=\"selflink\">";
4270                 if ($tag{'type'} eq "tag") {
4271                         print $cgi->a({-href => href(action=>"tag", hash=>$tag{'id'})}, "tag");
4272                 } else {
4273                         print "&nbsp;";
4274                 }
4275                 print "</td>\n" .
4276                       "<td class=\"link\">" . " | " .
4277                       $cgi->a({-href => href(action=>$tag{'reftype'}, hash=>$tag{'refid'})}, $tag{'reftype'});
4278                 if ($tag{'reftype'} eq "commit") {
4279                         print " | " . $cgi->a({-href => href(action=>"shortlog", hash=>$tag{'fullname'})}, "shortlog") .
4280                               " | " . $cgi->a({-href => href(action=>"log", hash=>$tag{'fullname'})}, "log");
4281                 } elsif ($tag{'reftype'} eq "blob") {
4282                         print " | " . $cgi->a({-href => href(action=>"blob_plain", hash=>$tag{'refid'})}, "raw");
4283                 }
4284                 print "</td>\n" .
4285                       "</tr>";
4286         }
4287         if (defined $extra) {
4288                 print "<tr>\n" .
4289                       "<td colspan=\"5\">$extra</td>\n" .
4290                       "</tr>\n";
4291         }
4292         print "</table>\n";
4293 }
4294
4295 sub git_heads_body {
4296         # uses global variable $project
4297         my ($headlist, $head, $from, $to, $extra) = @_;
4298         $from = 0 unless defined $from;
4299         $to = $#{$headlist} if (!defined $to || $#{$headlist} < $to);
4300
4301         print "<table class=\"heads\">\n";
4302         my $alternate = 1;
4303         for (my $i = $from; $i <= $to; $i++) {
4304                 my $entry = $headlist->[$i];
4305                 my %ref = %$entry;
4306                 my $curr = $ref{'id'} eq $head;
4307                 if ($alternate) {
4308                         print "<tr class=\"dark\">\n";
4309                 } else {
4310                         print "<tr class=\"light\">\n";
4311                 }
4312                 $alternate ^= 1;
4313                 print "<td><i>$ref{'age'}</i></td>\n" .
4314                       ($curr ? "<td class=\"current_head\">" : "<td>") .
4315                       $cgi->a({-href => href(action=>"shortlog", hash=>$ref{'fullname'}),
4316                                -class => "list name"},esc_html($ref{'name'})) .
4317                       "</td>\n" .
4318                       "<td class=\"link\">" .
4319                       $cgi->a({-href => href(action=>"shortlog", hash=>$ref{'fullname'})}, "shortlog") . " | " .
4320                       $cgi->a({-href => href(action=>"log", hash=>$ref{'fullname'})}, "log") . " | " .
4321                       $cgi->a({-href => href(action=>"tree", hash=>$ref{'fullname'}, hash_base=>$ref{'name'})}, "tree") .
4322                       "</td>\n" .
4323                       "</tr>";
4324         }
4325         if (defined $extra) {
4326                 print "<tr>\n" .
4327                       "<td colspan=\"3\">$extra</td>\n" .
4328                       "</tr>\n";
4329         }
4330         print "</table>\n";
4331 }
4332
4333 sub git_search_grep_body {
4334         my ($commitlist, $from, $to, $extra) = @_;
4335         $from = 0 unless defined $from;
4336         $to = $#{$commitlist} if (!defined $to || $#{$commitlist} < $to);
4337
4338         print "<table class=\"commit_search\">\n";
4339         my $alternate = 1;
4340         for (my $i = $from; $i <= $to; $i++) {
4341                 my %co = %{$commitlist->[$i]};
4342                 if (!%co) {
4343                         next;
4344                 }
4345                 my $commit = $co{'id'};
4346                 if ($alternate) {
4347                         print "<tr class=\"dark\">\n";
4348                 } else {
4349                         print "<tr class=\"light\">\n";
4350                 }
4351                 $alternate ^= 1;
4352                 my $author = chop_and_escape_str($co{'author_name'}, 15, 5);
4353                 print "<td title=\"$co{'age_string_age'}\"><i>$co{'age_string_date'}</i></td>\n" .
4354                       "<td><i>" . $author . "</i></td>\n" .
4355                       "<td>" .
4356                       $cgi->a({-href => href(action=>"commit", hash=>$co{'id'}),
4357                                -class => "list subject"},
4358                               chop_and_escape_str($co{'title'}, 50) . "<br/>");
4359                 my $comment = $co{'comment'};
4360                 foreach my $line (@$comment) {
4361                         if ($line =~ m/^(.*?)($search_regexp)(.*)$/i) {
4362                                 my ($lead, $match, $trail) = ($1, $2, $3);
4363                                 $match = chop_str($match, 70, 5, 'center');
4364                                 my $contextlen = int((80 - length($match))/2);
4365                                 $contextlen = 30 if ($contextlen > 30);
4366                                 $lead  = chop_str($lead,  $contextlen, 10, 'left');
4367                                 $trail = chop_str($trail, $contextlen, 10, 'right');
4368
4369                                 $lead  = esc_html($lead);
4370                                 $match = esc_html($match);
4371                                 $trail = esc_html($trail);
4372
4373                                 print "$lead<span class=\"match\">$match</span>$trail<br />";
4374                         }
4375                 }
4376                 print "</td>\n" .
4377                       "<td class=\"link\">" .
4378                       $cgi->a({-href => href(action=>"commit", hash=>$co{'id'})}, "commit") .
4379                       " | " .
4380                       $cgi->a({-href => href(action=>"commitdiff", hash=>$co{'id'})}, "commitdiff") .
4381                       " | " .
4382                       $cgi->a({-href => href(action=>"tree", hash=>$co{'tree'}, hash_base=>$co{'id'})}, "tree");
4383                 print "</td>\n" .
4384                       "</tr>\n";
4385         }
4386         if (defined $extra) {
4387                 print "<tr>\n" .
4388                       "<td colspan=\"3\">$extra</td>\n" .
4389                       "</tr>\n";
4390         }
4391         print "</table>\n";
4392 }
4393
4394 ## ======================================================================
4395 ## ======================================================================
4396 ## actions
4397
4398 sub git_project_list {
4399         my $order = $input_params{'order'};
4400         if (defined $order && $order !~ m/none|project|descr|owner|age/) {
4401                 die_error(400, "Unknown order parameter");
4402         }
4403
4404         my @list = git_get_projects_list();
4405         if (!@list) {
4406                 die_error(404, "No projects found");
4407         }
4408
4409         git_header_html();
4410         if (-f $home_text) {
4411                 print "<div class=\"index_include\">\n";
4412                 insert_file($home_text);
4413                 print "</div>\n";
4414         }
4415         print $cgi->startform(-method => "get") .
4416               "<p class=\"projsearch\">Search:\n" .
4417               $cgi->textfield(-name => "s", -value => $searchtext) . "\n" .
4418               "</p>" .
4419               $cgi->end_form() . "\n";
4420         git_project_list_body(\@list, $order);
4421         git_footer_html();
4422 }
4423
4424 sub git_forks {
4425         my $order = $input_params{'order'};
4426         if (defined $order && $order !~ m/none|project|descr|owner|age/) {
4427                 die_error(400, "Unknown order parameter");
4428         }
4429
4430         my @list = git_get_projects_list($project);
4431         if (!@list) {
4432                 die_error(404, "No forks found");
4433         }
4434
4435         git_header_html();
4436         git_print_page_nav('','');
4437         git_print_header_div('summary', "$project forks");
4438         git_project_list_body(\@list, $order);
4439         git_footer_html();
4440 }
4441
4442 sub git_project_index {
4443         my @projects = git_get_projects_list($project);
4444
4445         print $cgi->header(
4446                 -type => 'text/plain',
4447                 -charset => 'utf-8',
4448                 -content_disposition => 'inline; filename="index.aux"');
4449
4450         foreach my $pr (@projects) {
4451                 if (!exists $pr->{'owner'}) {
4452                         $pr->{'owner'} = git_get_project_owner("$pr->{'path'}");
4453                 }
4454
4455                 my ($path, $owner) = ($pr->{'path'}, $pr->{'owner'});
4456                 # quote as in CGI::Util::encode, but keep the slash, and use '+' for ' '
4457                 $path  =~ s/([^a-zA-Z0-9_.\-\/ ])/sprintf("%%%02X", ord($1))/eg;
4458                 $owner =~ s/([^a-zA-Z0-9_.\-\/ ])/sprintf("%%%02X", ord($1))/eg;
4459                 $path  =~ s/ /\+/g;
4460                 $owner =~ s/ /\+/g;
4461
4462                 print "$path $owner\n";
4463         }
4464 }
4465
4466 sub git_summary {
4467         my $descr = git_get_project_description($project) || "none";
4468         my %co = parse_commit("HEAD");
4469         my %cd = %co ? parse_date($co{'committer_epoch'}, $co{'committer_tz'}) : ();
4470         my $head = $co{'id'};
4471
4472         my $owner = git_get_project_owner($project);
4473
4474         my $refs = git_get_references();
4475         # These get_*_list functions return one more to allow us to see if
4476         # there are more ...
4477         my @taglist  = git_get_tags_list(16);
4478         my @headlist = git_get_heads_list(16);
4479         my @forklist;
4480         my $check_forks = gitweb_check_feature('forks');
4481
4482         if ($check_forks) {
4483                 @forklist = git_get_projects_list($project);
4484         }
4485
4486         git_header_html();
4487         git_print_page_nav('summary','', $head);
4488
4489         print "<div class=\"title\">&nbsp;</div>\n";
4490         print "<table class=\"projects_list\">\n" .
4491               "<tr id=\"metadata_desc\"><td>description</td><td>" . esc_html($descr) . "</td></tr>\n" .
4492               "<tr id=\"metadata_owner\"><td>owner</td><td>" . esc_html($owner) . "</td></tr>\n";
4493         if (defined $cd{'rfc2822'}) {
4494                 print "<tr id=\"metadata_lchange\"><td>last change</td><td>$cd{'rfc2822'}</td></tr>\n";
4495         }
4496
4497         # use per project git URL list in $projectroot/$project/cloneurl
4498         # or make project git URL from git base URL and project name
4499         my $url_tag = "URL";
4500         my @url_list = git_get_project_url_list($project);
4501         @url_list = map { "$_/$project" } @git_base_url_list unless @url_list;
4502         foreach my $git_url (@url_list) {
4503                 next unless $git_url;
4504                 print "<tr class=\"metadata_url\"><td>$url_tag</td><td>$git_url</td></tr>\n";
4505                 $url_tag = "";
4506         }
4507
4508         # Tag cloud
4509         my $show_ctags = gitweb_check_feature('ctags');
4510         if ($show_ctags) {
4511                 my $ctags = git_get_project_ctags($project);
4512                 my $cloud = git_populate_project_tagcloud($ctags);
4513                 print "<tr id=\"metadata_ctags\"><td>Content tags:<br />";
4514                 print "</td>\n<td>" unless %$ctags;
4515                 print "<form action=\"$show_ctags\" method=\"post\"><input type=\"hidden\" name=\"p\" value=\"$project\" />Add: <input type=\"text\" name=\"t\" size=\"8\" /></form>";
4516                 print "</td>\n<td>" if %$ctags;
4517                 print git_show_project_tagcloud($cloud, 48);
4518                 print "</td></tr>";
4519         }
4520
4521         print "</table>\n";
4522
4523         # If XSS prevention is on, we don't include README.html.
4524         # TODO: Allow a readme in some safe format.
4525         if (!$prevent_xss && -s "$projectroot/$project/README.html") {
4526                 print "<div class=\"title\">readme</div>\n" .
4527                       "<div class=\"readme\">\n";
4528                 insert_file("$projectroot/$project/README.html");
4529                 print "\n</div>\n"; # class="readme"
4530         }
4531
4532         # we need to request one more than 16 (0..15) to check if
4533         # those 16 are all
4534         my @commitlist = $head ? parse_commits($head, 17) : ();
4535         if (@commitlist) {
4536                 git_print_header_div('shortlog');
4537                 git_shortlog_body(\@commitlist, 0, 15, $refs,
4538                                   $#commitlist <=  15 ? undef :
4539                                   $cgi->a({-href => href(action=>"shortlog")}, "..."));
4540         }
4541
4542         if (@taglist) {
4543                 git_print_header_div('tags');
4544                 git_tags_body(\@taglist, 0, 15,
4545                               $#taglist <=  15 ? undef :
4546                               $cgi->a({-href => href(action=>"tags")}, "..."));
4547         }
4548
4549         if (@headlist) {
4550                 git_print_header_div('heads');
4551                 git_heads_body(\@headlist, $head, 0, 15,
4552                                $#headlist <= 15 ? undef :
4553                                $cgi->a({-href => href(action=>"heads")}, "..."));
4554         }
4555
4556         if (@forklist) {
4557                 git_print_header_div('forks');
4558                 git_project_list_body(\@forklist, 'age', 0, 15,
4559                                       $#forklist <= 15 ? undef :
4560                                       $cgi->a({-href => href(action=>"forks")}, "..."),
4561                                       'no_header');
4562         }
4563
4564         git_footer_html();
4565 }
4566
4567 sub git_tag {
4568         my $head = git_get_head_hash($project);
4569         git_header_html();
4570         git_print_page_nav('','', $head,undef,$head);
4571         my %tag = parse_tag($hash);
4572
4573         if (! %tag) {
4574                 die_error(404, "Unknown tag object");
4575         }
4576
4577         git_print_header_div('commit', esc_html($tag{'name'}), $hash);
4578         print "<div class=\"title_text\">\n" .
4579               "<table class=\"object_header\">\n" .
4580               "<tr>\n" .
4581               "<td>object</td>\n" .
4582               "<td>" . $cgi->a({-class => "list", -href => href(action=>$tag{'type'}, hash=>$tag{'object'})},
4583                                $tag{'object'}) . "</td>\n" .
4584               "<td class=\"link\">" . $cgi->a({-href => href(action=>$tag{'type'}, hash=>$tag{'object'})},
4585                                               $tag{'type'}) . "</td>\n" .
4586               "</tr>\n";
4587         if (defined($tag{'author'})) {
4588                 my %ad = parse_date($tag{'epoch'}, $tag{'tz'});
4589                 print "<tr><td>author</td><td>" . esc_html($tag{'author'}) . "</td></tr>\n";
4590                 print "<tr><td></td><td>" . $ad{'rfc2822'} .
4591                         sprintf(" (%02d:%02d %s)", $ad{'hour_local'}, $ad{'minute_local'}, $ad{'tz_local'}) .
4592                         "</td></tr>\n";
4593         }
4594         print "</table>\n\n" .
4595               "</div>\n";
4596         print "<div class=\"page_body\">";
4597         my $comment = $tag{'comment'};
4598         foreach my $line (@$comment) {
4599                 chomp $line;
4600                 print esc_html($line, -nbsp=>1) . "<br/>\n";
4601         }
4602         print "</div>\n";
4603         git_footer_html();
4604 }
4605
4606 sub git_blame {
4607         # permissions
4608         gitweb_check_feature('blame')
4609                 or die_error(403, "Blame view not allowed");
4610
4611         # error checking
4612         die_error(400, "No file name given") unless $file_name;
4613         $hash_base ||= git_get_head_hash($project);
4614         die_error(404, "Couldn't find base commit") unless $hash_base;
4615         my %co = parse_commit($hash_base)
4616                 or die_error(404, "Commit not found");
4617         my $ftype = "blob";
4618         if (!defined $hash) {
4619                 $hash = git_get_hash_by_path($hash_base, $file_name, "blob")
4620                         or die_error(404, "Error looking up file");
4621         } else {
4622                 $ftype = git_get_type($hash);
4623                 if ($ftype !~ "blob") {
4624                         die_error(400, "Object is not a blob");
4625                 }
4626         }
4627
4628         # run git-blame --porcelain
4629         open my $fd, "-|", git_cmd(), "blame", '-p',
4630                 $hash_base, '--', $file_name
4631                 or die_error(500, "Open git-blame failed");
4632
4633         # page header
4634         git_header_html();
4635         my $formats_nav =
4636                 $cgi->a({-href => href(action=>"blob", -replay=>1)},
4637                         "blob") .
4638                 " | " .
4639                 $cgi->a({-href => href(action=>"history", -replay=>1)},
4640                         "history") .
4641                 " | " .
4642                 $cgi->a({-href => href(action=>"blame", file_name=>$file_name)},
4643                         "HEAD");
4644         git_print_page_nav('','', $hash_base,$co{'tree'},$hash_base, $formats_nav);
4645         git_print_header_div('commit', esc_html($co{'title'}), $hash_base);
4646         git_print_page_path($file_name, $ftype, $hash_base);
4647
4648         # page body
4649         my @rev_color = qw(light2 dark2);
4650         my $num_colors = scalar(@rev_color);
4651         my $current_color = 0;
4652         my %metainfo = ();
4653
4654         print <<HTML;
4655 <div class="page_body">
4656 <table class="blame">
4657 <tr><th>Commit</th><th>Line</th><th>Data</th></tr>
4658 HTML
4659  LINE:
4660         while (my $line = <$fd>) {
4661                 chomp $line;
4662                 # the header: <SHA-1> <src lineno> <dst lineno> [<lines in group>]
4663                 # no <lines in group> for subsequent lines in group of lines
4664                 my ($full_rev, $orig_lineno, $lineno, $group_size) =
4665                    ($line =~ /^([0-9a-f]{40}) (\d+) (\d+)(?: (\d+))?$/);
4666                 if (!exists $metainfo{$full_rev}) {
4667                         $metainfo{$full_rev} = {};
4668                 }
4669                 my $meta = $metainfo{$full_rev};
4670                 my $data;
4671                 while ($data = <$fd>) {
4672                         chomp $data;
4673                         last if ($data =~ s/^\t//); # contents of line
4674                         if ($data =~ /^(\S+) (.*)$/) {
4675                                 $meta->{$1} = $2;
4676                         }
4677                 }
4678                 my $short_rev = substr($full_rev, 0, 8);
4679                 my $author = $meta->{'author'};
4680                 my %date =
4681                         parse_date($meta->{'author-time'}, $meta->{'author-tz'});
4682                 my $date = $date{'iso-tz'};
4683                 if ($group_size) {
4684                         $current_color = ($current_color + 1) % $num_colors;
4685                 }
4686                 print "<tr id=\"l$lineno\" class=\"$rev_color[$current_color]\">\n";
4687                 if ($group_size) {
4688                         print "<td class=\"sha1\"";
4689                         print " title=\"". esc_html($author) . ", $date\"";
4690                         print " rowspan=\"$group_size\"" if ($group_size > 1);
4691                         print ">";
4692                         print $cgi->a({-href => href(action=>"commit",
4693                                                      hash=>$full_rev,
4694                                                      file_name=>$file_name)},
4695                                       esc_html($short_rev));
4696                         print "</td>\n";
4697                 }
4698                 my $parent_commit;
4699                 if (!exists $meta->{'parent'}) {
4700                         open (my $dd, "-|", git_cmd(), "rev-parse", "$full_rev^")
4701                                 or die_error(500, "Open git-rev-parse failed");
4702                         $parent_commit = <$dd>;
4703                         close $dd;
4704                         chomp($parent_commit);
4705                         $meta->{'parent'} = $parent_commit;
4706                 } else {
4707                         $parent_commit = $meta->{'parent'};
4708                 }
4709                 my $blamed = href(action => 'blame',
4710                                   file_name => $meta->{'filename'},
4711                                   hash_base => $parent_commit);
4712                 print "<td class=\"linenr\">";
4713                 print $cgi->a({ -href => "$blamed#l$orig_lineno",
4714                                 -class => "linenr" },
4715                               esc_html($lineno));
4716                 print "</td>";
4717                 print "<td class=\"pre\">" . esc_html($data) . "</td>\n";
4718                 print "</tr>\n";
4719         }
4720         print "</table>\n";
4721         print "</div>";
4722         close $fd
4723                 or print "Reading blob failed\n";
4724
4725         # page footer
4726         git_footer_html();
4727 }
4728
4729 sub git_tags {
4730         my $head = git_get_head_hash($project);
4731         git_header_html();
4732         git_print_page_nav('','', $head,undef,$head);
4733         git_print_header_div('summary', $project);
4734
4735         my @tagslist = git_get_tags_list();
4736         if (@tagslist) {
4737                 git_tags_body(\@tagslist);
4738         }
4739         git_footer_html();
4740 }
4741
4742 sub git_heads {
4743         my $head = git_get_head_hash($project);
4744         git_header_html();
4745         git_print_page_nav('','', $head,undef,$head);
4746         git_print_header_div('summary', $project);
4747
4748         my @headslist = git_get_heads_list();
4749         if (@headslist) {
4750                 git_heads_body(\@headslist, $head);
4751         }
4752         git_footer_html();
4753 }
4754
4755 sub git_blob_plain {
4756         my $type = shift;
4757         my $expires;
4758
4759         if (!defined $hash) {
4760                 if (defined $file_name) {
4761                         my $base = $hash_base || git_get_head_hash($project);
4762                         $hash = git_get_hash_by_path($base, $file_name, "blob")
4763                                 or die_error(404, "Cannot find file");
4764                 } else {
4765                         die_error(400, "No file name defined");
4766                 }
4767         } elsif ($hash =~ m/^[0-9a-fA-F]{40}$/) {
4768                 # blobs defined by non-textual hash id's can be cached
4769                 $expires = "+1d";
4770         }
4771
4772         open my $fd, "-|", git_cmd(), "cat-file", "blob", $hash
4773                 or die_error(500, "Open git-cat-file blob '$hash' failed");
4774
4775         # content-type (can include charset)
4776         $type = blob_contenttype($fd, $file_name, $type);
4777
4778         # "save as" filename, even when no $file_name is given
4779         my $save_as = "$hash";
4780         if (defined $file_name) {
4781                 $save_as = $file_name;
4782         } elsif ($type =~ m/^text\//) {
4783                 $save_as .= '.txt';
4784         }
4785
4786         # With XSS prevention on, blobs of all types except a few known safe
4787         # ones are served with "Content-Disposition: attachment" to make sure
4788         # they don't run in our security domain.  For certain image types,
4789         # blob view writes an <img> tag referring to blob_plain view, and we
4790         # want to be sure not to break that by serving the image as an
4791         # attachment (though Firefox 3 doesn't seem to care).
4792         my $sandbox = $prevent_xss &&
4793                 $type !~ m!^(?:text/plain|image/(?:gif|png|jpeg))$!;
4794
4795         print $cgi->header(
4796                 -type => $type,
4797                 -expires => $expires,
4798                 -content_disposition =>
4799                         ($sandbox ? 'attachment' : 'inline')
4800                         . '; filename="' . $save_as . '"');
4801         local $/ = undef;
4802         binmode STDOUT, ':raw';
4803         print <$fd>;
4804         binmode STDOUT, ':utf8'; # as set at the beginning of gitweb.cgi
4805         close $fd;
4806 }
4807
4808 sub git_blob {
4809         my $expires;
4810
4811         if (!defined $hash) {
4812                 if (defined $file_name) {
4813                         my $base = $hash_base || git_get_head_hash($project);
4814                         $hash = git_get_hash_by_path($base, $file_name, "blob")
4815                                 or die_error(404, "Cannot find file");
4816                 } else {
4817                         die_error(400, "No file name defined");
4818                 }
4819         } elsif ($hash =~ m/^[0-9a-fA-F]{40}$/) {
4820                 # blobs defined by non-textual hash id's can be cached
4821                 $expires = "+1d";
4822         }
4823
4824         my $have_blame = gitweb_check_feature('blame');
4825         open my $fd, "-|", git_cmd(), "cat-file", "blob", $hash
4826                 or die_error(500, "Couldn't cat $file_name, $hash");
4827         my $mimetype = blob_mimetype($fd, $file_name);
4828         if ($mimetype !~ m!^(?:text/|image/(?:gif|png|jpeg)$)! && -B $fd) {
4829                 close $fd;
4830                 return git_blob_plain($mimetype);
4831         }
4832         # we can have blame only for text/* mimetype
4833         $have_blame &&= ($mimetype =~ m!^text/!);
4834
4835         git_header_html(undef, $expires);
4836         my $formats_nav = '';
4837         if (defined $hash_base && (my %co = parse_commit($hash_base))) {
4838                 if (defined $file_name) {
4839                         if ($have_blame) {
4840                                 $formats_nav .=
4841                                         $cgi->a({-href => href(action=>"blame", -replay=>1)},
4842                                                 "blame") .
4843                                         " | ";
4844                         }
4845                         $formats_nav .=
4846                                 $cgi->a({-href => href(action=>"history", -replay=>1)},
4847                                         "history") .
4848                                 " | " .
4849                                 $cgi->a({-href => href(action=>"blob_plain", -replay=>1)},
4850                                         "raw") .
4851                                 " | " .
4852                                 $cgi->a({-href => href(action=>"blob",
4853                                                        hash_base=>"HEAD", file_name=>$file_name)},
4854                                         "HEAD");
4855                 } else {
4856                         $formats_nav .=
4857                                 $cgi->a({-href => href(action=>"blob_plain", -replay=>1)},
4858                                         "raw");
4859                 }
4860                 git_print_page_nav('','', $hash_base,$co{'tree'},$hash_base, $formats_nav);
4861                 git_print_header_div('commit', esc_html($co{'title'}), $hash_base);
4862         } else {
4863                 print "<div class=\"page_nav\">\n" .
4864                       "<br/><br/></div>\n" .
4865                       "<div class=\"title\">$hash</div>\n";
4866         }
4867         git_print_page_path($file_name, "blob", $hash_base);
4868         print "<div class=\"page_body\">\n";
4869         if ($mimetype =~ m!^image/!) {
4870                 print qq!<img type="$mimetype"!;
4871                 if ($file_name) {
4872                         print qq! alt="$file_name" title="$file_name"!;
4873                 }
4874                 print qq! src="! .
4875                       href(action=>"blob_plain", hash=>$hash,
4876                            hash_base=>$hash_base, file_name=>$file_name) .
4877                       qq!" />\n!;
4878         } else {
4879                 my $nr;
4880                 while (my $line = <$fd>) {
4881                         chomp $line;
4882                         $nr++;
4883                         $line = untabify($line);
4884                         printf "<div class=\"pre\"><a id=\"l%i\" href=\"#l%i\" class=\"linenr\">%4i</a> %s</div>\n",
4885                                $nr, $nr, $nr, esc_html($line, -nbsp=>1);
4886                 }
4887         }
4888         close $fd
4889                 or print "Reading blob failed.\n";
4890         print "</div>";
4891         git_footer_html();
4892 }
4893
4894 sub git_tree {
4895         if (!defined $hash_base) {
4896                 $hash_base = "HEAD";
4897         }
4898         if (!defined $hash) {
4899                 if (defined $file_name) {
4900                         $hash = git_get_hash_by_path($hash_base, $file_name, "tree");
4901                 } else {
4902                         $hash = $hash_base;
4903                 }
4904         }
4905         die_error(404, "No such tree") unless defined($hash);
4906
4907         my @entries = ();
4908         {
4909                 local $/ = "\0";
4910                 open my $fd, "-|", git_cmd(), "ls-tree", '-z', $hash
4911                         or die_error(500, "Open git-ls-tree failed");
4912                 @entries = map { chomp; $_ } <$fd>;
4913                 close $fd
4914                         or die_error(404, "Reading tree failed");
4915         }
4916
4917         my $refs = git_get_references();
4918         my $ref = format_ref_marker($refs, $hash_base);
4919         git_header_html();
4920         my $basedir = '';
4921         my $have_blame = gitweb_check_feature('blame');
4922         if (defined $hash_base && (my %co = parse_commit($hash_base))) {
4923                 my @views_nav = ();
4924                 if (defined $file_name) {
4925                         push @views_nav,
4926                                 $cgi->a({-href => href(action=>"history", -replay=>1)},
4927                                         "history"),
4928                                 $cgi->a({-href => href(action=>"tree",
4929                                                        hash_base=>"HEAD", file_name=>$file_name)},
4930                                         "HEAD"),
4931                 }
4932                 my $snapshot_links = format_snapshot_links($hash);
4933                 if (defined $snapshot_links) {
4934                         # FIXME: Should be available when we have no hash base as well.
4935                         push @views_nav, $snapshot_links;
4936                 }
4937                 git_print_page_nav('tree','', $hash_base, undef, undef, join(' | ', @views_nav));
4938                 git_print_header_div('commit', esc_html($co{'title'}) . $ref, $hash_base);
4939         } else {
4940                 undef $hash_base;
4941                 print "<div class=\"page_nav\">\n";
4942                 print "<br/><br/></div>\n";
4943                 print "<div class=\"title\">$hash</div>\n";
4944         }
4945         if (defined $file_name) {
4946                 $basedir = $file_name;
4947                 if ($basedir ne '' && substr($basedir, -1) ne '/') {
4948                         $basedir .= '/';
4949                 }
4950                 git_print_page_path($file_name, 'tree', $hash_base);
4951         }
4952         print "<div class=\"page_body\">\n";
4953         print "<table class=\"tree\">\n";
4954         my $alternate = 1;
4955         # '..' (top directory) link if possible
4956         if (defined $hash_base &&
4957             defined $file_name && $file_name =~ m![^/]+$!) {
4958                 if ($alternate) {
4959                         print "<tr class=\"dark\">\n";
4960                 } else {
4961                         print "<tr class=\"light\">\n";
4962                 }
4963                 $alternate ^= 1;
4964
4965                 my $up = $file_name;
4966                 $up =~ s!/?[^/]+$!!;
4967                 undef $up unless $up;
4968                 # based on git_print_tree_entry
4969                 print '<td class="mode">' . mode_str('040000') . "</td>\n";
4970                 print '<td class="list">';
4971                 print $cgi->a({-href => href(action=>"tree", hash_base=>$hash_base,
4972                                              file_name=>$up)},
4973                               "..");
4974                 print "</td>\n";
4975                 print "<td class=\"link\"></td>\n";
4976
4977                 print "</tr>\n";
4978         }
4979         foreach my $line (@entries) {
4980                 my %t = parse_ls_tree_line($line, -z => 1);
4981
4982                 if ($alternate) {
4983                         print "<tr class=\"dark\">\n";
4984                 } else {
4985                         print "<tr class=\"light\">\n";
4986                 }
4987                 $alternate ^= 1;
4988
4989                 git_print_tree_entry(\%t, $basedir, $hash_base, $have_blame);
4990
4991                 print "</tr>\n";
4992         }
4993         print "</table>\n" .
4994               "</div>";
4995         git_footer_html();
4996 }
4997
4998 sub git_snapshot {
4999         my $format = $input_params{'snapshot_format'};
5000         if (!@snapshot_fmts) {
5001                 die_error(403, "Snapshots not allowed");
5002         }
5003         # default to first supported snapshot format
5004         $format ||= $snapshot_fmts[0];
5005         if ($format !~ m/^[a-z0-9]+$/) {
5006                 die_error(400, "Invalid snapshot format parameter");
5007         } elsif (!exists($known_snapshot_formats{$format})) {
5008                 die_error(400, "Unknown snapshot format");
5009         } elsif (!grep($_ eq $format, @snapshot_fmts)) {
5010                 die_error(403, "Unsupported snapshot format");
5011         }
5012
5013         if (!defined $hash) {
5014                 $hash = git_get_head_hash($project);
5015         }
5016
5017         my $name = $project;
5018         $name =~ s,([^/])/*\.git$,$1,;
5019         $name = basename($name);
5020         my $filename = to_utf8($name);
5021         $name =~ s/\047/\047\\\047\047/g;
5022         my $cmd;
5023         $filename .= "-$hash$known_snapshot_formats{$format}{'suffix'}";
5024         $cmd = quote_command(
5025                 git_cmd(), 'archive',
5026                 "--format=$known_snapshot_formats{$format}{'format'}",
5027                 "--prefix=$name/", $hash);
5028         if (exists $known_snapshot_formats{$format}{'compressor'}) {
5029                 $cmd .= ' | ' . quote_command(@{$known_snapshot_formats{$format}{'compressor'}});
5030         }
5031
5032         print $cgi->header(
5033                 -type => $known_snapshot_formats{$format}{'type'},
5034                 -content_disposition => 'inline; filename="' . "$filename" . '"',
5035                 -status => '200 OK');
5036
5037         open my $fd, "-|", $cmd
5038                 or die_error(500, "Execute git-archive failed");
5039         binmode STDOUT, ':raw';
5040         print <$fd>;
5041         binmode STDOUT, ':utf8'; # as set at the beginning of gitweb.cgi
5042         close $fd;
5043 }
5044
5045 sub git_log {
5046         my $head = git_get_head_hash($project);
5047         if (!defined $hash) {
5048                 $hash = $head;
5049         }
5050         if (!defined $page) {
5051                 $page = 0;
5052         }
5053         my $refs = git_get_references();
5054
5055         my @commitlist = parse_commits($hash, 101, (100 * $page));
5056
5057         my $paging_nav = format_paging_nav('log', $hash, $head, $page, $#commitlist >= 100);
5058
5059         my ($patch_max) = gitweb_get_feature('patches');
5060         if ($patch_max) {
5061                 if ($patch_max < 0 || @commitlist <= $patch_max) {
5062                         $paging_nav .= " &sdot; " .
5063                                 $cgi->a({-href => href(action=>"patches", -replay=>1)},
5064                                         "patches");
5065                 }
5066         }
5067
5068         git_header_html();
5069         git_print_page_nav('log','', $hash,undef,undef, $paging_nav);
5070
5071         if (!@commitlist) {
5072                 my %co = parse_commit($hash);
5073
5074                 git_print_header_div('summary', $project);
5075                 print "<div class=\"page_body\"> Last change $co{'age_string'}.<br/><br/></div>\n";
5076         }
5077         my $to = ($#commitlist >= 99) ? (99) : ($#commitlist);
5078         for (my $i = 0; $i <= $to; $i++) {
5079                 my %co = %{$commitlist[$i]};
5080                 next if !%co;
5081                 my $commit = $co{'id'};
5082                 my $ref = format_ref_marker($refs, $commit);
5083                 my %ad = parse_date($co{'author_epoch'});
5084                 git_print_header_div('commit',
5085                                "<span class=\"age\">$co{'age_string'}</span>" .
5086                                esc_html($co{'title'}) . $ref,
5087                                $commit);
5088                 print "<div class=\"title_text\">\n" .
5089                       "<div class=\"log_link\">\n" .
5090                       $cgi->a({-href => href(action=>"commit", hash=>$commit)}, "commit") .
5091                       " | " .
5092                       $cgi->a({-href => href(action=>"commitdiff", hash=>$commit)}, "commitdiff") .
5093                       " | " .
5094                       $cgi->a({-href => href(action=>"tree", hash=>$commit, hash_base=>$commit)}, "tree") .
5095                       "<br/>\n" .
5096                       "</div>\n" .
5097                       "<i>" . esc_html($co{'author_name'}) .  " [$ad{'rfc2822'}]</i><br/>\n" .
5098                       "</div>\n";
5099
5100                 print "<div class=\"log_body\">\n";
5101                 git_print_log($co{'comment'}, -final_empty_line=> 1);
5102                 print "</div>\n";
5103         }
5104         if ($#commitlist >= 100) {
5105                 print "<div class=\"page_nav\">\n";
5106                 print $cgi->a({-href => href(-replay=>1, page=>$page+1),
5107                                -accesskey => "n", -title => "Alt-n"}, "next");
5108                 print "</div>\n";
5109         }
5110         git_footer_html();
5111 }
5112
5113 sub git_commit {
5114         $hash ||= $hash_base || "HEAD";
5115         my %co = parse_commit($hash)
5116             or die_error(404, "Unknown commit object");
5117         my %ad = parse_date($co{'author_epoch'}, $co{'author_tz'});
5118         my %cd = parse_date($co{'committer_epoch'}, $co{'committer_tz'});
5119
5120         my $parent  = $co{'parent'};
5121         my $parents = $co{'parents'}; # listref
5122
5123         # we need to prepare $formats_nav before any parameter munging
5124         my $formats_nav;
5125         if (!defined $parent) {
5126                 # --root commitdiff
5127                 $formats_nav .= '(initial)';
5128         } elsif (@$parents == 1) {
5129                 # single parent commit
5130                 $formats_nav .=
5131                         '(parent: ' .
5132                         $cgi->a({-href => href(action=>"commit",
5133                                                hash=>$parent)},
5134                                 esc_html(substr($parent, 0, 7))) .
5135                         ')';
5136         } else {
5137                 # merge commit
5138                 $formats_nav .=
5139                         '(merge: ' .
5140                         join(' ', map {
5141                                 $cgi->a({-href => href(action=>"commit",
5142                                                        hash=>$_)},
5143                                         esc_html(substr($_, 0, 7)));
5144                         } @$parents ) .
5145                         ')';
5146         }
5147         if (gitweb_check_feature('patches')) {
5148                 $formats_nav .= " | " .
5149                         $cgi->a({-href => href(action=>"patch", -replay=>1)},
5150                                 "patch");
5151         }
5152
5153         if (!defined $parent) {
5154                 $parent = "--root";
5155         }
5156         my @difftree;
5157         open my $fd, "-|", git_cmd(), "diff-tree", '-r', "--no-commit-id",
5158                 @diff_opts,
5159                 (@$parents <= 1 ? $parent : '-c'),
5160                 $hash, "--"
5161                 or die_error(500, "Open git-diff-tree failed");
5162         @difftree = map { chomp; $_ } <$fd>;
5163         close $fd or die_error(404, "Reading git-diff-tree failed");
5164
5165         # non-textual hash id's can be cached
5166         my $expires;
5167         if ($hash =~ m/^[0-9a-fA-F]{40}$/) {
5168                 $expires = "+1d";
5169         }
5170         my $refs = git_get_references();
5171         my $ref = format_ref_marker($refs, $co{'id'});
5172
5173         git_header_html(undef, $expires);
5174         git_print_page_nav('commit', '',
5175                            $hash, $co{'tree'}, $hash,
5176                            $formats_nav);
5177
5178         if (defined $co{'parent'}) {
5179                 git_print_header_div('commitdiff', esc_html($co{'title'}) . $ref, $hash);
5180         } else {
5181                 git_print_header_div('tree', esc_html($co{'title'}) . $ref, $co{'tree'}, $hash);
5182         }
5183         print "<div class=\"title_text\">\n" .
5184               "<table class=\"object_header\">\n";
5185         print "<tr><td>author</td><td>" . esc_html($co{'author'}) . "</td></tr>\n".
5186               "<tr>" .
5187               "<td></td><td> $ad{'rfc2822'}";
5188         if ($ad{'hour_local'} < 6) {
5189                 printf(" (<span class=\"atnight\">%02d:%02d</span> %s)",
5190                        $ad{'hour_local'}, $ad{'minute_local'}, $ad{'tz_local'});
5191         } else {
5192                 printf(" (%02d:%02d %s)",
5193                        $ad{'hour_local'}, $ad{'minute_local'}, $ad{'tz_local'});
5194         }
5195         print "</td>" .
5196               "</tr>\n";
5197         print "<tr><td>committer</td><td>" . esc_html($co{'committer'}) . "</td></tr>\n";
5198         print "<tr><td></td><td> $cd{'rfc2822'}" .
5199               sprintf(" (%02d:%02d %s)", $cd{'hour_local'}, $cd{'minute_local'}, $cd{'tz_local'}) .
5200               "</td></tr>\n";
5201         print "<tr><td>commit</td><td class=\"sha1\">$co{'id'}</td></tr>\n";
5202         print "<tr>" .
5203               "<td>tree</td>" .
5204               "<td class=\"sha1\">" .
5205               $cgi->a({-href => href(action=>"tree", hash=>$co{'tree'}, hash_base=>$hash),
5206                        class => "list"}, $co{'tree'}) .
5207               "</td>" .
5208               "<td class=\"link\">" .
5209               $cgi->a({-href => href(action=>"tree", hash=>$co{'tree'}, hash_base=>$hash)},
5210                       "tree");
5211         my $snapshot_links = format_snapshot_links($hash);
5212         if (defined $snapshot_links) {
5213                 print " | " . $snapshot_links;
5214         }
5215         print "</td>" .
5216               "</tr>\n";
5217
5218         foreach my $par (@$parents) {
5219                 print "<tr>" .
5220                       "<td>parent</td>" .
5221                       "<td class=\"sha1\">" .
5222                       $cgi->a({-href => href(action=>"commit", hash=>$par),
5223                                class => "list"}, $par) .
5224                       "</td>" .
5225                       "<td class=\"link\">" .
5226                       $cgi->a({-href => href(action=>"commit", hash=>$par)}, "commit") .
5227                       " | " .
5228                       $cgi->a({-href => href(action=>"commitdiff", hash=>$hash, hash_parent=>$par)}, "diff") .
5229                       "</td>" .
5230                       "</tr>\n";
5231         }
5232         print "</table>".
5233               "</div>\n";
5234
5235         print "<div class=\"page_body\">\n";
5236         git_print_log($co{'comment'});
5237         print "</div>\n";
5238
5239         git_difftree_body(\@difftree, $hash, @$parents);
5240
5241         git_footer_html();
5242 }
5243
5244 sub git_object {
5245         # object is defined by:
5246         # - hash or hash_base alone
5247         # - hash_base and file_name
5248         my $type;
5249
5250         # - hash or hash_base alone
5251         if ($hash || ($hash_base && !defined $file_name)) {
5252                 my $object_id = $hash || $hash_base;
5253
5254                 open my $fd, "-|", quote_command(
5255                         git_cmd(), 'cat-file', '-t', $object_id) . ' 2> /dev/null'
5256                         or die_error(404, "Object does not exist");
5257                 $type = <$fd>;
5258                 chomp $type;
5259                 close $fd
5260                         or die_error(404, "Object does not exist");
5261
5262         # - hash_base and file_name
5263         } elsif ($hash_base && defined $file_name) {
5264                 $file_name =~ s,/+$,,;
5265
5266                 system(git_cmd(), "cat-file", '-e', $hash_base) == 0
5267                         or die_error(404, "Base object does not exist");
5268
5269                 # here errors should not hapen
5270                 open my $fd, "-|", git_cmd(), "ls-tree", $hash_base, "--", $file_name
5271                         or die_error(500, "Open git-ls-tree failed");
5272                 my $line = <$fd>;
5273                 close $fd;
5274
5275                 #'100644 blob 0fa3f3a66fb6a137f6ec2c19351ed4d807070ffa  panic.c'
5276                 unless ($line && $line =~ m/^([0-9]+) (.+) ([0-9a-fA-F]{40})\t/) {
5277                         die_error(404, "File or directory for given base does not exist");
5278                 }
5279                 $type = $2;
5280                 $hash = $3;
5281         } else {
5282                 die_error(400, "Not enough information to find object");
5283         }
5284
5285         print $cgi->redirect(-uri => href(action=>$type, -full=>1,
5286                                           hash=>$hash, hash_base=>$hash_base,
5287                                           file_name=>$file_name),
5288                              -status => '302 Found');
5289 }
5290
5291 sub git_blobdiff {
5292         my $format = shift || 'html';
5293
5294         my $fd;
5295         my @difftree;
5296         my %diffinfo;
5297         my $expires;
5298
5299         # preparing $fd and %diffinfo for git_patchset_body
5300         # new style URI
5301         if (defined $hash_base && defined $hash_parent_base) {
5302                 if (defined $file_name) {
5303                         # read raw output
5304                         open $fd, "-|", git_cmd(), "diff-tree", '-r', @diff_opts,
5305                                 $hash_parent_base, $hash_base,
5306                                 "--", (defined $file_parent ? $file_parent : ()), $file_name
5307                                 or die_error(500, "Open git-diff-tree failed");
5308                         @difftree = map { chomp; $_ } <$fd>;
5309                         close $fd
5310                                 or die_error(404, "Reading git-diff-tree failed");
5311                         @difftree
5312                                 or die_error(404, "Blob diff not found");
5313
5314                 } elsif (defined $hash &&
5315                          $hash =~ /[0-9a-fA-F]{40}/) {
5316                         # try to find filename from $hash
5317
5318                         # read filtered raw output
5319                         open $fd, "-|", git_cmd(), "diff-tree", '-r', @diff_opts,
5320                                 $hash_parent_base, $hash_base, "--"
5321                                 or die_error(500, "Open git-diff-tree failed");
5322                         @difftree =
5323                                 # ':100644 100644 03b21826... 3b93d5e7... M     ls-files.c'
5324                                 # $hash == to_id
5325                                 grep { /^:[0-7]{6} [0-7]{6} [0-9a-fA-F]{40} $hash/ }
5326                                 map { chomp; $_ } <$fd>;
5327                         close $fd
5328                                 or die_error(404, "Reading git-diff-tree failed");
5329                         @difftree
5330                                 or die_error(404, "Blob diff not found");
5331
5332                 } else {
5333                         die_error(400, "Missing one of the blob diff parameters");
5334                 }
5335
5336                 if (@difftree > 1) {
5337                         die_error(400, "Ambiguous blob diff specification");
5338                 }
5339
5340                 %diffinfo = parse_difftree_raw_line($difftree[0]);
5341                 $file_parent ||= $diffinfo{'from_file'} || $file_name;
5342                 $file_name   ||= $diffinfo{'to_file'};
5343
5344                 $hash_parent ||= $diffinfo{'from_id'};
5345                 $hash        ||= $diffinfo{'to_id'};
5346
5347                 # non-textual hash id's can be cached
5348                 if ($hash_base =~ m/^[0-9a-fA-F]{40}$/ &&
5349                     $hash_parent_base =~ m/^[0-9a-fA-F]{40}$/) {
5350                         $expires = '+1d';
5351                 }
5352
5353                 # open patch output
5354                 open $fd, "-|", git_cmd(), "diff-tree", '-r', @diff_opts,
5355                         '-p', ($format eq 'html' ? "--full-index" : ()),
5356                         $hash_parent_base, $hash_base,
5357                         "--", (defined $file_parent ? $file_parent : ()), $file_name
5358                         or die_error(500, "Open git-diff-tree failed");
5359         }
5360
5361         # old/legacy style URI -- not generated anymore since 1.4.3.
5362         if (!%diffinfo) {
5363                 die_error('404 Not Found', "Missing one of the blob diff parameters")
5364         }
5365
5366         # header
5367         if ($format eq 'html') {
5368                 my $formats_nav =
5369                         $cgi->a({-href => href(action=>"blobdiff_plain", -replay=>1)},
5370                                 "raw");
5371                 git_header_html(undef, $expires);
5372                 if (defined $hash_base && (my %co = parse_commit($hash_base))) {
5373                         git_print_page_nav('','', $hash_base,$co{'tree'},$hash_base, $formats_nav);
5374                         git_print_header_div('commit', esc_html($co{'title'}), $hash_base);
5375                 } else {
5376                         print "<div class=\"page_nav\"><br/>$formats_nav<br/></div>\n";
5377                         print "<div class=\"title\">$hash vs $hash_parent</div>\n";
5378                 }
5379                 if (defined $file_name) {
5380                         git_print_page_path($file_name, "blob", $hash_base);
5381                 } else {
5382                         print "<div class=\"page_path\"></div>\n";
5383                 }
5384
5385         } elsif ($format eq 'plain') {
5386                 print $cgi->header(
5387                         -type => 'text/plain',
5388                         -charset => 'utf-8',
5389                         -expires => $expires,
5390                         -content_disposition => 'inline; filename="' . "$file_name" . '.patch"');
5391
5392                 print "X-Git-Url: " . $cgi->self_url() . "\n\n";
5393
5394         } else {
5395                 die_error(400, "Unknown blobdiff format");
5396         }
5397
5398         # patch
5399         if ($format eq 'html') {
5400                 print "<div class=\"page_body\">\n";
5401
5402                 git_patchset_body($fd, [ \%diffinfo ], $hash_base, $hash_parent_base);
5403                 close $fd;
5404
5405                 print "</div>\n"; # class="page_body"
5406                 git_footer_html();
5407
5408         } else {
5409                 while (my $line = <$fd>) {
5410                         $line =~ s!a/($hash|$hash_parent)!'a/'.esc_path($diffinfo{'from_file'})!eg;
5411                         $line =~ s!b/($hash|$hash_parent)!'b/'.esc_path($diffinfo{'to_file'})!eg;
5412
5413                         print $line;
5414
5415                         last if $line =~ m!^\+\+\+!;
5416                 }
5417                 local $/ = undef;
5418                 print <$fd>;
5419                 close $fd;
5420         }
5421 }
5422
5423 sub git_blobdiff_plain {
5424         git_blobdiff('plain');
5425 }
5426
5427 sub git_commitdiff {
5428         my %params = @_;
5429         my $format = $params{-format} || 'html';
5430
5431         my ($patch_max) = gitweb_get_feature('patches');
5432         if ($format eq 'patch') {
5433                 die_error(403, "Patch view not allowed") unless $patch_max;
5434         }
5435
5436         $hash ||= $hash_base || "HEAD";
5437         my %co = parse_commit($hash)
5438             or die_error(404, "Unknown commit object");
5439
5440         # choose format for commitdiff for merge
5441         if (! defined $hash_parent && @{$co{'parents'}} > 1) {
5442                 $hash_parent = '--cc';
5443         }
5444         # we need to prepare $formats_nav before almost any parameter munging
5445         my $formats_nav;
5446         if ($format eq 'html') {
5447                 $formats_nav =
5448                         $cgi->a({-href => href(action=>"commitdiff_plain", -replay=>1)},
5449                                 "raw");
5450                 if ($patch_max) {
5451                         $formats_nav .= " | " .
5452                                 $cgi->a({-href => href(action=>"patch", -replay=>1)},
5453                                         "patch");
5454                 }
5455
5456                 if (defined $hash_parent &&
5457                     $hash_parent ne '-c' && $hash_parent ne '--cc') {
5458                         # commitdiff with two commits given
5459                         my $hash_parent_short = $hash_parent;
5460                         if ($hash_parent =~ m/^[0-9a-fA-F]{40}$/) {
5461                                 $hash_parent_short = substr($hash_parent, 0, 7);
5462                         }
5463                         $formats_nav .=
5464                                 ' (from';
5465                         for (my $i = 0; $i < @{$co{'parents'}}; $i++) {
5466                                 if ($co{'parents'}[$i] eq $hash_parent) {
5467                                         $formats_nav .= ' parent ' . ($i+1);
5468                                         last;
5469                                 }
5470                         }
5471                         $formats_nav .= ': ' .
5472                                 $cgi->a({-href => href(action=>"commitdiff",
5473                                                        hash=>$hash_parent)},
5474                                         esc_html($hash_parent_short)) .
5475                                 ')';
5476                 } elsif (!$co{'parent'}) {
5477                         # --root commitdiff
5478                         $formats_nav .= ' (initial)';
5479                 } elsif (scalar @{$co{'parents'}} == 1) {
5480                         # single parent commit
5481                         $formats_nav .=
5482                                 ' (parent: ' .
5483                                 $cgi->a({-href => href(action=>"commitdiff",
5484                                                        hash=>$co{'parent'})},
5485                                         esc_html(substr($co{'parent'}, 0, 7))) .
5486                                 ')';
5487                 } else {
5488                         # merge commit
5489                         if ($hash_parent eq '--cc') {
5490                                 $formats_nav .= ' | ' .
5491                                         $cgi->a({-href => href(action=>"commitdiff",
5492                                                                hash=>$hash, hash_parent=>'-c')},
5493                                                 'combined');
5494                         } else { # $hash_parent eq '-c'
5495                                 $formats_nav .= ' | ' .
5496                                         $cgi->a({-href => href(action=>"commitdiff",
5497                                                                hash=>$hash, hash_parent=>'--cc')},
5498                                                 'compact');
5499                         }
5500                         $formats_nav .=
5501                                 ' (merge: ' .
5502                                 join(' ', map {
5503                                         $cgi->a({-href => href(action=>"commitdiff",
5504                                                                hash=>$_)},
5505                                                 esc_html(substr($_, 0, 7)));
5506                                 } @{$co{'parents'}} ) .
5507                                 ')';
5508                 }
5509         }
5510
5511         my $hash_parent_param = $hash_parent;
5512         if (!defined $hash_parent_param) {
5513                 # --cc for multiple parents, --root for parentless
5514                 $hash_parent_param =
5515                         @{$co{'parents'}} > 1 ? '--cc' : $co{'parent'} || '--root';
5516         }
5517
5518         # read commitdiff
5519         my $fd;
5520         my @difftree;
5521         if ($format eq 'html') {
5522                 open $fd, "-|", git_cmd(), "diff-tree", '-r', @diff_opts,
5523                         "--no-commit-id", "--patch-with-raw", "--full-index",
5524                         $hash_parent_param, $hash, "--"
5525                         or die_error(500, "Open git-diff-tree failed");
5526
5527                 while (my $line = <$fd>) {
5528                         chomp $line;
5529                         # empty line ends raw part of diff-tree output
5530                         last unless $line;
5531                         push @difftree, scalar parse_difftree_raw_line($line);
5532                 }
5533
5534         } elsif ($format eq 'plain') {
5535                 open $fd, "-|", git_cmd(), "diff-tree", '-r', @diff_opts,
5536                         '-p', $hash_parent_param, $hash, "--"
5537                         or die_error(500, "Open git-diff-tree failed");
5538         } elsif ($format eq 'patch') {
5539                 # For commit ranges, we limit the output to the number of
5540                 # patches specified in the 'patches' feature.
5541                 # For single commits, we limit the output to a single patch,
5542                 # diverging from the git-format-patch default.
5543                 my @commit_spec = ();
5544                 if ($hash_parent) {
5545                         if ($patch_max > 0) {
5546                                 push @commit_spec, "-$patch_max";
5547                         }
5548                         push @commit_spec, '-n', "$hash_parent..$hash";
5549                 } else {
5550                         if ($params{-single}) {
5551                                 push @commit_spec, '-1';
5552                         } else {
5553                                 if ($patch_max > 0) {
5554                                         push @commit_spec, "-$patch_max";
5555                                 }
5556                                 push @commit_spec, "-n";
5557                         }
5558                         push @commit_spec, '--root', $hash;
5559                 }
5560                 open $fd, "-|", git_cmd(), "format-patch", '--encoding=utf8',
5561                         '--stdout', @commit_spec
5562                         or die_error(500, "Open git-format-patch failed");
5563         } else {
5564                 die_error(400, "Unknown commitdiff format");
5565         }
5566
5567         # non-textual hash id's can be cached
5568         my $expires;
5569         if ($hash =~ m/^[0-9a-fA-F]{40}$/) {
5570                 $expires = "+1d";
5571         }
5572
5573         # write commit message
5574         if ($format eq 'html') {
5575                 my $refs = git_get_references();
5576                 my $ref = format_ref_marker($refs, $co{'id'});
5577
5578                 git_header_html(undef, $expires);
5579                 git_print_page_nav('commitdiff','', $hash,$co{'tree'},$hash, $formats_nav);
5580                 git_print_header_div('commit', esc_html($co{'title'}) . $ref, $hash);
5581                 git_print_authorship(\%co);
5582                 print "<div class=\"page_body\">\n";
5583                 if (@{$co{'comment'}} > 1) {
5584                         print "<div class=\"log\">\n";
5585                         git_print_log($co{'comment'}, -final_empty_line=> 1, -remove_title => 1);
5586                         print "</div>\n"; # class="log"
5587                 }
5588
5589         } elsif ($format eq 'plain') {
5590                 my $refs = git_get_references("tags");
5591                 my $tagname = git_get_rev_name_tags($hash);
5592                 my $filename = basename($project) . "-$hash.patch";
5593
5594                 print $cgi->header(
5595                         -type => 'text/plain',
5596                         -charset => 'utf-8',
5597                         -expires => $expires,
5598                         -content_disposition => 'inline; filename="' . "$filename" . '"');
5599                 my %ad = parse_date($co{'author_epoch'}, $co{'author_tz'});
5600                 print "From: " . to_utf8($co{'author'}) . "\n";
5601                 print "Date: $ad{'rfc2822'} ($ad{'tz_local'})\n";
5602                 print "Subject: " . to_utf8($co{'title'}) . "\n";
5603
5604                 print "X-Git-Tag: $tagname\n" if $tagname;
5605                 print "X-Git-Url: " . $cgi->self_url() . "\n\n";
5606
5607                 foreach my $line (@{$co{'comment'}}) {
5608                         print to_utf8($line) . "\n";
5609                 }
5610                 print "---\n\n";
5611         } elsif ($format eq 'patch') {
5612                 my $filename = basename($project) . "-$hash.patch";
5613
5614                 print $cgi->header(
5615                         -type => 'text/plain',
5616                         -charset => 'utf-8',
5617                         -expires => $expires,
5618                         -content_disposition => 'inline; filename="' . "$filename" . '"');
5619         }
5620
5621         # write patch
5622         if ($format eq 'html') {
5623                 my $use_parents = !defined $hash_parent ||
5624                         $hash_parent eq '-c' || $hash_parent eq '--cc';
5625                 git_difftree_body(\@difftree, $hash,
5626                                   $use_parents ? @{$co{'parents'}} : $hash_parent);
5627                 print "<br/>\n";
5628
5629                 git_patchset_body($fd, \@difftree, $hash,
5630                                   $use_parents ? @{$co{'parents'}} : $hash_parent);
5631                 close $fd;
5632                 print "</div>\n"; # class="page_body"
5633                 git_footer_html();
5634
5635         } elsif ($format eq 'plain') {
5636                 local $/ = undef;
5637                 print <$fd>;
5638                 close $fd
5639                         or print "Reading git-diff-tree failed\n";
5640         } elsif ($format eq 'patch') {
5641                 local $/ = undef;
5642                 print <$fd>;
5643                 close $fd
5644                         or print "Reading git-format-patch failed\n";
5645         }
5646 }
5647
5648 sub git_commitdiff_plain {
5649         git_commitdiff(-format => 'plain');
5650 }
5651
5652 # format-patch-style patches
5653 sub git_patch {
5654         git_commitdiff(-format => 'patch', -single=> 1);
5655 }
5656
5657 sub git_patches {
5658         git_commitdiff(-format => 'patch');
5659 }
5660
5661 sub git_history {
5662         if (!defined $hash_base) {
5663                 $hash_base = git_get_head_hash($project);
5664         }
5665         if (!defined $page) {
5666                 $page = 0;
5667         }
5668         my $ftype;
5669         my %co = parse_commit($hash_base)
5670             or die_error(404, "Unknown commit object");
5671
5672         my $refs = git_get_references();
5673         my $limit = sprintf("--max-count=%i", (100 * ($page+1)));
5674
5675         my @commitlist = parse_commits($hash_base, 101, (100 * $page),
5676                                        $file_name, "--full-history")
5677             or die_error(404, "No such file or directory on given branch");
5678
5679         if (!defined $hash && defined $file_name) {
5680                 # some commits could have deleted file in question,
5681                 # and not have it in tree, but one of them has to have it
5682                 for (my $i = 0; $i <= @commitlist; $i++) {
5683                         $hash = git_get_hash_by_path($commitlist[$i]{'id'}, $file_name);
5684                         last if defined $hash;
5685                 }
5686         }
5687         if (defined $hash) {
5688                 $ftype = git_get_type($hash);
5689         }
5690         if (!defined $ftype) {
5691                 die_error(500, "Unknown type of object");
5692         }
5693
5694         my $paging_nav = '';
5695         if ($page > 0) {
5696                 $paging_nav .=
5697                         $cgi->a({-href => href(action=>"history", hash=>$hash, hash_base=>$hash_base,
5698                                                file_name=>$file_name)},
5699                                 "first");
5700                 $paging_nav .= " &sdot; " .
5701                         $cgi->a({-href => href(-replay=>1, page=>$page-1),
5702                                  -accesskey => "p", -title => "Alt-p"}, "prev");
5703         } else {
5704                 $paging_nav .= "first";
5705                 $paging_nav .= " &sdot; prev";
5706         }
5707         my $next_link = '';
5708         if ($#commitlist >= 100) {
5709                 $next_link =
5710                         $cgi->a({-href => href(-replay=>1, page=>$page+1),
5711                                  -accesskey => "n", -title => "Alt-n"}, "next");
5712                 $paging_nav .= " &sdot; $next_link";
5713         } else {
5714                 $paging_nav .= " &sdot; next";
5715         }
5716
5717         git_header_html();
5718         git_print_page_nav('history','', $hash_base,$co{'tree'},$hash_base, $paging_nav);
5719         git_print_header_div('commit', esc_html($co{'title'}), $hash_base);
5720         git_print_page_path($file_name, $ftype, $hash_base);
5721
5722         git_history_body(\@commitlist, 0, 99,
5723                          $refs, $hash_base, $ftype, $next_link);
5724
5725         git_footer_html();
5726 }
5727
5728 sub git_search {
5729         gitweb_check_feature('search') or die_error(403, "Search is disabled");
5730         if (!defined $searchtext) {
5731                 die_error(400, "Text field is empty");
5732         }
5733         if (!defined $hash) {
5734                 $hash = git_get_head_hash($project);
5735         }
5736         my %co = parse_commit($hash);
5737         if (!%co) {
5738                 die_error(404, "Unknown commit object");
5739         }
5740         if (!defined $page) {
5741                 $page = 0;
5742         }
5743
5744         $searchtype ||= 'commit';
5745         if ($searchtype eq 'pickaxe') {
5746                 # pickaxe may take all resources of your box and run for several minutes
5747                 # with every query - so decide by yourself how public you make this feature
5748                 gitweb_check_feature('pickaxe')
5749                     or die_error(403, "Pickaxe is disabled");
5750         }
5751         if ($searchtype eq 'grep') {
5752                 gitweb_check_feature('grep')
5753                     or die_error(403, "Grep is disabled");
5754         }
5755
5756         git_header_html();
5757
5758         if ($searchtype eq 'commit' or $searchtype eq 'author' or $searchtype eq 'committer') {
5759                 my $greptype;
5760                 if ($searchtype eq 'commit') {
5761                         $greptype = "--grep=";
5762                 } elsif ($searchtype eq 'author') {
5763                         $greptype = "--author=";
5764                 } elsif ($searchtype eq 'committer') {
5765                         $greptype = "--committer=";
5766                 }
5767                 $greptype .= $searchtext;
5768                 my @commitlist = parse_commits($hash, 101, (100 * $page), undef,
5769                                                $greptype, '--regexp-ignore-case',
5770                                                $search_use_regexp ? '--extended-regexp' : '--fixed-strings');
5771
5772                 my $paging_nav = '';
5773                 if ($page > 0) {
5774                         $paging_nav .=
5775                                 $cgi->a({-href => href(action=>"search", hash=>$hash,
5776                                                        searchtext=>$searchtext,
5777                                                        searchtype=>$searchtype)},
5778                                         "first");
5779                         $paging_nav .= " &sdot; " .
5780                                 $cgi->a({-href => href(-replay=>1, page=>$page-1),
5781                                          -accesskey => "p", -title => "Alt-p"}, "prev");
5782                 } else {
5783                         $paging_nav .= "first";
5784                         $paging_nav .= " &sdot; prev";
5785                 }
5786                 my $next_link = '';
5787                 if ($#commitlist >= 100) {
5788                         $next_link =
5789                                 $cgi->a({-href => href(-replay=>1, page=>$page+1),
5790                                          -accesskey => "n", -title => "Alt-n"}, "next");
5791                         $paging_nav .= " &sdot; $next_link";
5792                 } else {
5793                         $paging_nav .= " &sdot; next";
5794                 }
5795
5796                 if ($#commitlist >= 100) {
5797                 }
5798
5799                 git_print_page_nav('','', $hash,$co{'tree'},$hash, $paging_nav);
5800                 git_print_header_div('commit', esc_html($co{'title'}), $hash);
5801                 git_search_grep_body(\@commitlist, 0, 99, $next_link);
5802         }
5803
5804         if ($searchtype eq 'pickaxe') {
5805                 git_print_page_nav('','', $hash,$co{'tree'},$hash);
5806                 git_print_header_div('commit', esc_html($co{'title'}), $hash);
5807
5808                 print "<table class=\"pickaxe search\">\n";
5809                 my $alternate = 1;
5810                 local $/ = "\n";
5811                 open my $fd, '-|', git_cmd(), '--no-pager', 'log', @diff_opts,
5812                         '--pretty=format:%H', '--no-abbrev', '--raw', "-S$searchtext",
5813                         ($search_use_regexp ? '--pickaxe-regex' : ());
5814                 undef %co;
5815                 my @files;
5816                 while (my $line = <$fd>) {
5817                         chomp $line;
5818                         next unless $line;
5819
5820                         my %set = parse_difftree_raw_line($line);
5821                         if (defined $set{'commit'}) {
5822                                 # finish previous commit
5823                                 if (%co) {
5824                                         print "</td>\n" .
5825                                               "<td class=\"link\">" .
5826                                               $cgi->a({-href => href(action=>"commit", hash=>$co{'id'})}, "commit") .
5827                                               " | " .
5828                                               $cgi->a({-href => href(action=>"tree", hash=>$co{'tree'}, hash_base=>$co{'id'})}, "tree");
5829                                         print "</td>\n" .
5830                                               "</tr>\n";
5831                                 }
5832
5833                                 if ($alternate) {
5834                                         print "<tr class=\"dark\">\n";
5835                                 } else {
5836                                         print "<tr class=\"light\">\n";
5837                                 }
5838                                 $alternate ^= 1;
5839                                 %co = parse_commit($set{'commit'});
5840                                 my $author = chop_and_escape_str($co{'author_name'}, 15, 5);
5841                                 print "<td title=\"$co{'age_string_age'}\"><i>$co{'age_string_date'}</i></td>\n" .
5842                                       "<td><i>$author</i></td>\n" .
5843                                       "<td>" .
5844                                       $cgi->a({-href => href(action=>"commit", hash=>$co{'id'}),
5845                                               -class => "list subject"},
5846                                               chop_and_escape_str($co{'title'}, 50) . "<br/>");
5847                         } elsif (defined $set{'to_id'}) {
5848                                 next if ($set{'to_id'} =~ m/^0{40}$/);
5849
5850                                 print $cgi->a({-href => href(action=>"blob", hash_base=>$co{'id'},
5851                                                              hash=>$set{'to_id'}, file_name=>$set{'to_file'}),
5852                                               -class => "list"},
5853                                               "<span class=\"match\">" . esc_path($set{'file'}) . "</span>") .
5854                                       "<br/>\n";
5855                         }
5856                 }
5857                 close $fd;
5858
5859                 # finish last commit (warning: repetition!)
5860                 if (%co) {
5861                         print "</td>\n" .
5862                               "<td class=\"link\">" .
5863                               $cgi->a({-href => href(action=>"commit", hash=>$co{'id'})}, "commit") .
5864                               " | " .
5865                               $cgi->a({-href => href(action=>"tree", hash=>$co{'tree'}, hash_base=>$co{'id'})}, "tree");
5866                         print "</td>\n" .
5867                               "</tr>\n";
5868                 }
5869
5870                 print "</table>\n";
5871         }
5872
5873         if ($searchtype eq 'grep') {
5874                 git_print_page_nav('','', $hash,$co{'tree'},$hash);
5875                 git_print_header_div('commit', esc_html($co{'title'}), $hash);
5876
5877                 print "<table class=\"grep_search\">\n";
5878                 my $alternate = 1;
5879                 my $matches = 0;
5880                 local $/ = "\n";
5881                 open my $fd, "-|", git_cmd(), 'grep', '-n',
5882                         $search_use_regexp ? ('-E', '-i') : '-F',
5883                         $searchtext, $co{'tree'};
5884                 my $lastfile = '';
5885                 while (my $line = <$fd>) {
5886                         chomp $line;
5887                         my ($file, $lno, $ltext, $binary);
5888                         last if ($matches++ > 1000);
5889                         if ($line =~ /^Binary file (.+) matches$/) {
5890                                 $file = $1;
5891                                 $binary = 1;
5892                         } else {
5893                                 (undef, $file, $lno, $ltext) = split(/:/, $line, 4);
5894                         }
5895                         if ($file ne $lastfile) {
5896                                 $lastfile and print "</td></tr>\n";
5897                                 if ($alternate++) {
5898                                         print "<tr class=\"dark\">\n";
5899                                 } else {
5900                                         print "<tr class=\"light\">\n";
5901                                 }
5902                                 print "<td class=\"list\">".
5903                                         $cgi->a({-href => href(action=>"blob", hash=>$co{'hash'},
5904                                                                file_name=>"$file"),
5905                                                 -class => "list"}, esc_path($file));
5906                                 print "</td><td>\n";
5907                                 $lastfile = $file;
5908                         }
5909                         if ($binary) {
5910                                 print "<div class=\"binary\">Binary file</div>\n";
5911                         } else {
5912                                 $ltext = untabify($ltext);
5913                                 if ($ltext =~ m/^(.*)($search_regexp)(.*)$/i) {
5914                                         $ltext = esc_html($1, -nbsp=>1);
5915                                         $ltext .= '<span class="match">';
5916                                         $ltext .= esc_html($2, -nbsp=>1);
5917                                         $ltext .= '</span>';
5918                                         $ltext .= esc_html($3, -nbsp=>1);
5919                                 } else {
5920                                         $ltext = esc_html($ltext, -nbsp=>1);
5921                                 }
5922                                 print "<div class=\"pre\">" .
5923                                         $cgi->a({-href => href(action=>"blob", hash=>$co{'hash'},
5924                                                                file_name=>"$file").'#l'.$lno,
5925                                                 -class => "linenr"}, sprintf('%4i', $lno))
5926                                         . ' ' .  $ltext . "</div>\n";
5927                         }
5928                 }
5929                 if ($lastfile) {
5930                         print "</td></tr>\n";
5931                         if ($matches > 1000) {
5932                                 print "<div class=\"diff nodifferences\">Too many matches, listing trimmed</div>\n";
5933                         }
5934                 } else {
5935                         print "<div class=\"diff nodifferences\">No matches found</div>\n";
5936                 }
5937                 close $fd;
5938
5939                 print "</table>\n";
5940         }
5941         git_footer_html();
5942 }
5943
5944 sub git_search_help {
5945         git_header_html();
5946         git_print_page_nav('','', $hash,$hash,$hash);
5947         print <<EOT;
5948 <p><strong>Pattern</strong> is by default a normal string that is matched precisely (but without
5949 regard to case, except in the case of pickaxe). However, when you check the <em>re</em> checkbox,
5950 the pattern entered is recognized as the POSIX extended
5951 <a href="http://en.wikipedia.org/wiki/Regular_expression">regular expression</a> (also case
5952 insensitive).</p>
5953 <dl>
5954 <dt><b>commit</b></dt>
5955 <dd>The commit messages and authorship information will be scanned for the given pattern.</dd>
5956 EOT
5957         my $have_grep = gitweb_check_feature('grep');
5958         if ($have_grep) {
5959                 print <<EOT;
5960 <dt><b>grep</b></dt>
5961 <dd>All files in the currently selected tree (HEAD unless you are explicitly browsing
5962     a different one) are searched for the given pattern. On large trees, this search can take
5963 a while and put some strain on the server, so please use it with some consideration. Note that
5964 due to git-grep peculiarity, currently if regexp mode is turned off, the matches are
5965 case-sensitive.</dd>
5966 EOT
5967         }
5968         print <<EOT;
5969 <dt><b>author</b></dt>
5970 <dd>Name and e-mail of the change author and date of birth of the patch will be scanned for the given pattern.</dd>
5971 <dt><b>committer</b></dt>
5972 <dd>Name and e-mail of the committer and date of commit will be scanned for the given pattern.</dd>
5973 EOT
5974         my $have_pickaxe = gitweb_check_feature('pickaxe');
5975         if ($have_pickaxe) {
5976                 print <<EOT;
5977 <dt><b>pickaxe</b></dt>
5978 <dd>All commits that caused the string to appear or disappear from any file (changes that
5979 added, removed or "modified" the string) will be listed. This search can take a while and
5980 takes a lot of strain on the server, so please use it wisely. Note that since you may be
5981 interested even in changes just changing the case as well, this search is case sensitive.</dd>
5982 EOT
5983         }
5984         print "</dl>\n";
5985         git_footer_html();
5986 }
5987
5988 sub git_shortlog {
5989         my $head = git_get_head_hash($project);
5990         if (!defined $hash) {
5991                 $hash = $head;
5992         }
5993         if (!defined $page) {
5994                 $page = 0;
5995         }
5996         my $refs = git_get_references();
5997
5998         my $commit_hash = $hash;
5999         if (defined $hash_parent) {
6000                 $commit_hash = "$hash_parent..$hash";
6001         }
6002         my @commitlist = parse_commits($commit_hash, 101, (100 * $page));
6003
6004         my $paging_nav = format_paging_nav('shortlog', $hash, $head, $page, $#commitlist >= 100);
6005         my $next_link = '';
6006         if ($#commitlist >= 100) {
6007                 $next_link =
6008                         $cgi->a({-href => href(-replay=>1, page=>$page+1),
6009                                  -accesskey => "n", -title => "Alt-n"}, "next");
6010         }
6011         my $patch_max = gitweb_check_feature('patches');
6012         if ($patch_max) {
6013                 if ($patch_max < 0 || @commitlist <= $patch_max) {
6014                         $paging_nav .= " &sdot; " .
6015                                 $cgi->a({-href => href(action=>"patches", -replay=>1)},
6016                                         "patches");
6017                 }
6018         }
6019
6020         git_header_html();
6021         git_print_page_nav('shortlog','', $hash,$hash,$hash, $paging_nav);
6022         git_print_header_div('summary', $project);
6023
6024         git_shortlog_body(\@commitlist, 0, 99, $refs, $next_link);
6025
6026         git_footer_html();
6027 }
6028
6029 ## ......................................................................
6030 ## feeds (RSS, Atom; OPML)
6031
6032 sub git_feed {
6033         my $format = shift || 'atom';
6034         my $have_blame = gitweb_check_feature('blame');
6035
6036         # Atom: http://www.atomenabled.org/developers/syndication/
6037         # RSS:  http://www.notestips.com/80256B3A007F2692/1/NAMO5P9UPQ
6038         if ($format ne 'rss' && $format ne 'atom') {
6039                 die_error(400, "Unknown web feed format");
6040         }
6041
6042         # log/feed of current (HEAD) branch, log of given branch, history of file/directory
6043         my $head = $hash || 'HEAD';
6044         my @commitlist = parse_commits($head, 150, 0, $file_name);
6045
6046         my %latest_commit;
6047         my %latest_date;
6048         my $content_type = "application/$format+xml";
6049         if (defined $cgi->http('HTTP_ACCEPT') &&
6050                  $cgi->Accept('text/xml') > $cgi->Accept($content_type)) {
6051                 # browser (feed reader) prefers text/xml
6052                 $content_type = 'text/xml';
6053         }
6054         if (defined($commitlist[0])) {
6055                 %latest_commit = %{$commitlist[0]};
6056                 my $latest_epoch = $latest_commit{'committer_epoch'};
6057                 %latest_date   = parse_date($latest_epoch);
6058                 my $if_modified = $cgi->http('IF_MODIFIED_SINCE');
6059                 if (defined $if_modified) {
6060                         my $since;
6061                         if (eval { require HTTP::Date; 1; }) {
6062                                 $since = HTTP::Date::str2time($if_modified);
6063                         } elsif (eval { require Time::ParseDate; 1; }) {
6064                                 $since = Time::ParseDate::parsedate($if_modified, GMT => 1);
6065                         }
6066                         if (defined $since && $latest_epoch <= $since) {
6067                                 print $cgi->header(
6068                                         -type => $content_type,
6069                                         -charset => 'utf-8',
6070                                         -last_modified => $latest_date{'rfc2822'},
6071                                         -status => '304 Not Modified');
6072                                 return;
6073                         }
6074                 }
6075                 print $cgi->header(
6076                         -type => $content_type,
6077                         -charset => 'utf-8',
6078                         -last_modified => $latest_date{'rfc2822'});
6079         } else {
6080                 print $cgi->header(
6081                         -type => $content_type,
6082                         -charset => 'utf-8');
6083         }
6084
6085         # Optimization: skip generating the body if client asks only
6086         # for Last-Modified date.
6087         return if ($cgi->request_method() eq 'HEAD');
6088
6089         # header variables
6090         my $title = "$site_name - $project/$action";
6091         my $feed_type = 'log';
6092         if (defined $hash) {
6093                 $title .= " - '$hash'";
6094                 $feed_type = 'branch log';
6095                 if (defined $file_name) {
6096                         $title .= " :: $file_name";
6097                         $feed_type = 'history';
6098                 }
6099         } elsif (defined $file_name) {
6100                 $title .= " - $file_name";
6101                 $feed_type = 'history';
6102         }
6103         $title .= " $feed_type";
6104         my $descr = git_get_project_description($project);
6105         if (defined $descr) {
6106                 $descr = esc_html($descr);
6107         } else {
6108                 $descr = "$project " .
6109                          ($format eq 'rss' ? 'RSS' : 'Atom') .
6110                          " feed";
6111         }
6112         my $owner = git_get_project_owner($project);
6113         $owner = esc_html($owner);
6114
6115         #header
6116         my $alt_url;
6117         if (defined $file_name) {
6118                 $alt_url = href(-full=>1, action=>"history", hash=>$hash, file_name=>$file_name);
6119         } elsif (defined $hash) {
6120                 $alt_url = href(-full=>1, action=>"log", hash=>$hash);
6121         } else {
6122                 $alt_url = href(-full=>1, action=>"summary");
6123         }
6124         print qq!<?xml version="1.0" encoding="utf-8"?>\n!;
6125         if ($format eq 'rss') {
6126                 print <<XML;
6127 <rss version="2.0" xmlns:content="http://purl.org/rss/1.0/modules/content/">
6128 <channel>
6129 XML
6130                 print "<title>$title</title>\n" .
6131                       "<link>$alt_url</link>\n" .
6132                       "<description>$descr</description>\n" .
6133                       "<language>en</language>\n" .
6134                       # project owner is responsible for 'editorial' content
6135                       "<managingEditor>$owner</managingEditor>\n";
6136                 if (defined $logo || defined $favicon) {
6137                         # prefer the logo to the favicon, since RSS
6138                         # doesn't allow both
6139                         my $img = esc_url($logo || $favicon);
6140                         print "<image>\n" .
6141                               "<url>$img</url>\n" .
6142                               "<title>$title</title>\n" .
6143                               "<link>$alt_url</link>\n" .
6144                               "</image>\n";
6145                 }
6146                 if (%latest_date) {
6147                         print "<pubDate>$latest_date{'rfc2822'}</pubDate>\n";
6148                         print "<lastBuildDate>$latest_date{'rfc2822'}</lastBuildDate>\n";
6149                 }
6150                 print "<generator>gitweb v.$version/$git_version</generator>\n";
6151         } elsif ($format eq 'atom') {
6152                 print <<XML;
6153 <feed xmlns="http://www.w3.org/2005/Atom">
6154 XML
6155                 print "<title>$title</title>\n" .
6156                       "<subtitle>$descr</subtitle>\n" .
6157                       '<link rel="alternate" type="text/html" href="' .
6158                       $alt_url . '" />' . "\n" .
6159                       '<link rel="self" type="' . $content_type . '" href="' .
6160                       $cgi->self_url() . '" />' . "\n" .
6161                       "<id>" . href(-full=>1) . "</id>\n" .
6162                       # use project owner for feed author
6163                       "<author><name>$owner</name></author>\n";
6164                 if (defined $favicon) {
6165                         print "<icon>" . esc_url($favicon) . "</icon>\n";
6166                 }
6167                 if (defined $logo_url) {
6168                         # not twice as wide as tall: 72 x 27 pixels
6169                         print "<logo>" . esc_url($logo) . "</logo>\n";
6170                 }
6171                 if (! %latest_date) {
6172                         # dummy date to keep the feed valid until commits trickle in:
6173                         print "<updated>1970-01-01T00:00:00Z</updated>\n";
6174                 } else {
6175                         print "<updated>$latest_date{'iso-8601'}</updated>\n";
6176                 }
6177                 print "<generator version='$version/$git_version'>gitweb</generator>\n";
6178         }
6179
6180         # contents
6181         for (my $i = 0; $i <= $#commitlist; $i++) {
6182                 my %co = %{$commitlist[$i]};
6183                 my $commit = $co{'id'};
6184                 # we read 150, we always show 30 and the ones more recent than 48 hours
6185                 if (($i >= 20) && ((time - $co{'author_epoch'}) > 48*60*60)) {
6186                         last;
6187                 }
6188                 my %cd = parse_date($co{'author_epoch'});
6189
6190                 # get list of changed files
6191                 open my $fd, "-|", git_cmd(), "diff-tree", '-r', @diff_opts,
6192                         $co{'parent'} || "--root",
6193                         $co{'id'}, "--", (defined $file_name ? $file_name : ())
6194                         or next;
6195                 my @difftree = map { chomp; $_ } <$fd>;
6196                 close $fd
6197                         or next;
6198
6199                 # print element (entry, item)
6200                 my $co_url = href(-full=>1, action=>"commitdiff", hash=>$commit);
6201                 if ($format eq 'rss') {
6202                         print "<item>\n" .
6203                               "<title>" . esc_html($co{'title'}) . "</title>\n" .
6204                               "<author>" . esc_html($co{'author'}) . "</author>\n" .
6205                               "<pubDate>$cd{'rfc2822'}</pubDate>\n" .
6206                               "<guid isPermaLink=\"true\">$co_url</guid>\n" .
6207                               "<link>$co_url</link>\n" .
6208                               "<description>" . esc_html($co{'title'}) . "</description>\n" .
6209                               "<content:encoded>" .
6210                               "<![CDATA[\n";
6211                 } elsif ($format eq 'atom') {
6212                         print "<entry>\n" .
6213                               "<title type=\"html\">" . esc_html($co{'title'}) . "</title>\n" .
6214                               "<updated>$cd{'iso-8601'}</updated>\n" .
6215                               "<author>\n" .
6216                               "  <name>" . esc_html($co{'author_name'}) . "</name>\n";
6217                         if ($co{'author_email'}) {
6218                                 print "  <email>" . esc_html($co{'author_email'}) . "</email>\n";
6219                         }
6220                         print "</author>\n" .
6221                               # use committer for contributor
6222                               "<contributor>\n" .
6223                               "  <name>" . esc_html($co{'committer_name'}) . "</name>\n";
6224                         if ($co{'committer_email'}) {
6225                                 print "  <email>" . esc_html($co{'committer_email'}) . "</email>\n";
6226                         }
6227                         print "</contributor>\n" .
6228                               "<published>$cd{'iso-8601'}</published>\n" .
6229                               "<link rel=\"alternate\" type=\"text/html\" href=\"$co_url\" />\n" .
6230                               "<id>$co_url</id>\n" .
6231                               "<content type=\"xhtml\" xml:base=\"" . esc_url($my_url) . "\">\n" .
6232                               "<div xmlns=\"http://www.w3.org/1999/xhtml\">\n";
6233                 }
6234                 my $comment = $co{'comment'};
6235                 print "<pre>\n";
6236                 foreach my $line (@$comment) {
6237                         $line = esc_html($line);
6238                         print "$line\n";
6239                 }
6240                 print "</pre><ul>\n";
6241                 foreach my $difftree_line (@difftree) {
6242                         my %difftree = parse_difftree_raw_line($difftree_line);
6243                         next if !$difftree{'from_id'};
6244
6245                         my $file = $difftree{'file'} || $difftree{'to_file'};
6246
6247                         print "<li>" .
6248                               "[" .
6249                               $cgi->a({-href => href(-full=>1, action=>"blobdiff",
6250                                                      hash=>$difftree{'to_id'}, hash_parent=>$difftree{'from_id'},
6251                                                      hash_base=>$co{'id'}, hash_parent_base=>$co{'parent'},
6252                                                      file_name=>$file, file_parent=>$difftree{'from_file'}),
6253                                       -title => "diff"}, 'D');
6254                         if ($have_blame) {
6255                                 print $cgi->a({-href => href(-full=>1, action=>"blame",
6256                                                              file_name=>$file, hash_base=>$commit),
6257                                               -title => "blame"}, 'B');
6258                         }
6259                         # if this is not a feed of a file history
6260                         if (!defined $file_name || $file_name ne $file) {
6261                                 print $cgi->a({-href => href(-full=>1, action=>"history",
6262                                                              file_name=>$file, hash=>$commit),
6263                                               -title => "history"}, 'H');
6264                         }
6265                         $file = esc_path($file);
6266                         print "] ".
6267                               "$file</li>\n";
6268                 }
6269                 if ($format eq 'rss') {
6270                         print "</ul>]]>\n" .
6271                               "</content:encoded>\n" .
6272                               "</item>\n";
6273                 } elsif ($format eq 'atom') {
6274                         print "</ul>\n</div>\n" .
6275                               "</content>\n" .
6276                               "</entry>\n";
6277                 }
6278         }
6279
6280         # end of feed
6281         if ($format eq 'rss') {
6282                 print "</channel>\n</rss>\n";
6283         } elsif ($format eq 'atom') {
6284                 print "</feed>\n";
6285         }
6286 }
6287
6288 sub git_rss {
6289         git_feed('rss');
6290 }
6291
6292 sub git_atom {
6293         git_feed('atom');
6294 }
6295
6296 sub git_opml {
6297         my @list = git_get_projects_list();
6298
6299         print $cgi->header(
6300                 -type => 'text/xml',
6301                 -charset => 'utf-8',
6302                 -content_disposition => 'inline; filename="opml.xml"');
6303
6304         print <<XML;
6305 <?xml version="1.0" encoding="utf-8"?>
6306 <opml version="1.0">
6307 <head>
6308   <title>$site_name OPML Export</title>
6309 </head>
6310 <body>
6311 <outline text="git RSS feeds">
6312 XML
6313
6314         foreach my $pr (@list) {
6315                 my %proj = %$pr;
6316                 my $head = git_get_head_hash($proj{'path'});
6317                 if (!defined $head) {
6318                         next;
6319                 }
6320                 $git_dir = "$projectroot/$proj{'path'}";
6321                 my %co = parse_commit($head);
6322                 if (!%co) {
6323                         next;
6324                 }
6325
6326                 my $path = esc_html(chop_str($proj{'path'}, 25, 5));
6327                 my $rss  = href('project' => $proj{'path'}, 'action' => 'rss', -full => 1);
6328                 my $html = href('project' => $proj{'path'}, 'action' => 'summary', -full => 1);
6329                 print "<outline type=\"rss\" text=\"$path\" title=\"$path\" xmlUrl=\"$rss\" htmlUrl=\"$html\"/>\n";
6330         }
6331         print <<XML;
6332 </outline>
6333 </body>
6334 </opml>
6335 XML
6336 }