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(exists $known_snapshot_formats{$_}, @fmts);
 462
 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                         my $sfx;
 694                         $hash =~ s/(\Q$opt{'suffix'}\E|\Q.$fmt\E)$//;
 695                         next unless $sfx = $1;
 696                         # a valid suffix was found, so set the snapshot format
 697                         # and reset the hash parameter
 698                         $input_params{'snapshot_format'} = $fmt;
 699                         $input_params{'hash'} = $hash;
 700                         # we also set the format suffix to the one requested
 701                         # in the URL: this way a request for e.g. .tgz returns
 702                         # a .tgz instead of a .tar.gz
 703                         $known_snapshot_formats{$fmt}{'suffix'} = $sfx;
 704                         last;
 705                 }
 706         }
 707 }
 708 evaluate_path_info();
 709
 710 our $action = $input_params{'action'};
 711 if (defined $action) {
 712         if (!validate_action($action)) {
 713                 die_error(400, "Invalid action parameter");
 714         }
 715 }
 716
 717 # parameters which are pathnames
 718 our $project = $input_params{'project'};
 719 if (defined $project) {
 720         if (!validate_project($project)) {
 721                 undef $project;
 722                 die_error(404, "No such project");
 723         }
 724 }
 725
 726 our $file_name = $input_params{'file_name'};
 727 if (defined $file_name) {
 728         if (!validate_pathname($file_name)) {
 729                 die_error(400, "Invalid file parameter");
 730         }
 731 }
 732
 733 our $file_parent = $input_params{'file_parent'};
 734 if (defined $file_parent) {
 735         if (!validate_pathname($file_parent)) {
 736                 die_error(400, "Invalid file parent parameter");
 737         }
 738 }
 739
 740 # parameters which are refnames
 741 our $hash = $input_params{'hash'};
 742 if (defined $hash) {
 743         if (!validate_refname($hash)) {
 744                 die_error(400, "Invalid hash parameter");
 745         }
 746 }
 747
 748 our $hash_parent = $input_params{'hash_parent'};
 749 if (defined $hash_parent) {
 750         if (!validate_refname($hash_parent)) {
 751                 die_error(400, "Invalid hash parent parameter");
 752         }
 753 }
 754
 755 our $hash_base = $input_params{'hash_base'};
 756 if (defined $hash_base) {
 757         if (!validate_refname($hash_base)) {
 758                 die_error(400, "Invalid hash base parameter");
 759         }
 760 }
 761
 762 our @extra_options = @{$input_params{'extra_options'}};
 763 # @extra_options is always defined, since it can only be (currently) set from
 764 # CGI, and $cgi->param() returns the empty array in array context if the param
 765 # is not set
 766 foreach my $opt (@extra_options) {
 767         if (not exists $allowed_options{$opt}) {
 768                 die_error(400, "Invalid option parameter");
 769         }
 770         if (not grep(/^$action$/, @{$allowed_options{$opt}})) {
 771                 die_error(400, "Invalid option parameter for this action");
 772         }
 773 }
 774
 775 our $hash_parent_base = $input_params{'hash_parent_base'};
 776 if (defined $hash_parent_base) {
 777         if (!validate_refname($hash_parent_base)) {
 778                 die_error(400, "Invalid hash parent base parameter");
 779         }
 780 }
 781
 782 # other parameters
 783 our $page = $input_params{'page'};
 784 if (defined $page) {
 785         if ($page =~ m/[^0-9]/) {
 786                 die_error(400, "Invalid page parameter");
 787         }
 788 }
 789
 790 our $searchtype = $input_params{'searchtype'};
 791 if (defined $searchtype) {
 792         if ($searchtype =~ m/[^a-z]/) {
 793                 die_error(400, "Invalid searchtype parameter");
 794         }
 795 }
 796
 797 our $search_use_regexp = $input_params{'search_use_regexp'};
 798
 799 our $searchtext = $input_params{'searchtext'};
 800 our $search_regexp;
 801 if (defined $searchtext) {
 802         if (length($searchtext) < 2) {
 803                 die_error(403, "At least two characters are required for search parameter");
 804         }
 805         $search_regexp = $search_use_regexp ? $searchtext : quotemeta $searchtext;
 806 }
 807
 808 # path to the current git repository
 809 our $git_dir;
 810 $git_dir = "$projectroot/$project" if $project;
 811
 812 # list of supported snapshot formats
 813 our @snapshot_fmts = gitweb_get_feature('snapshot');
 814 @snapshot_fmts = filter_snapshot_fmts(@snapshot_fmts);
 815
 816 # dispatch
 817 if (!defined $action) {
 818         if (defined $hash) {
 819                 $action = git_get_type($hash);
 820         } elsif (defined $hash_base && defined $file_name) {
 821                 $action = git_get_type("$hash_base:$file_name");
 822         } elsif (defined $project) {
 823                 $action = 'summary';
 824         } else {
 825                 $action = 'project_list';
 826         }
 827 }
 828 if (!defined($actions{$action})) {
 829         die_error(400, "Unknown action");
 830 }
 831 if ($action !~ m/^(opml|project_list|project_index)$/ &&
 832     !$project) {
 833         die_error(400, "Project needed");
 834 }
 835 $actions{$action}->();
 836 exit;
 837
 838 ## ======================================================================
 839 ## action links
 840
 841 sub href (%) {
 842         my %params = @_;
 843         # default is to use -absolute url() i.e. $my_uri
 844         my $href = $params{-full} ? $my_url : $my_uri;
 845
 846         $params{'project'} = $project unless exists $params{'project'};
 847
 848         if ($params{-replay}) {
 849                 while (my ($name, $symbol) = each %cgi_param_mapping) {
 850                         if (!exists $params{$name}) {
 851                                 $params{$name} = $input_params{$name};
 852                         }
 853                 }
 854         }
 855
 856         my $use_pathinfo = gitweb_check_feature('pathinfo');
 857         if ($use_pathinfo and defined $params{'project'}) {
 858                 # try to put as many parameters as possible in PATH_INFO:
 859                 #   - project name
 860                 #   - action
 861                 #   - hash_parent or hash_parent_base:/file_parent
 862                 #   - hash or hash_base:/filename
 863                 #   - the snapshot_format as an appropriate suffix
 864
 865                 # When the script is the root DirectoryIndex for the domain,
 866                 # $href here would be something like http://gitweb.example.com/
 867                 # Thus, we strip any trailing / from $href, to spare us double
 868                 # slashes in the final URL
 869                 $href =~ s,/$,,;
 870
 871                 # Then add the project name, if present
 872                 $href .= "/".esc_url($params{'project'});
 873                 delete $params{'project'};
 874
 875                 # since we destructively absorb parameters, we keep this
 876                 # boolean that remembers if we're handling a snapshot
 877                 my $is_snapshot = $params{'action'} eq 'snapshot';
 878
 879                 # Summary just uses the project path URL, any other action is
 880                 # added to the URL
 881                 if (defined $params{'action'}) {
 882                         $href .= "/".esc_url($params{'action'}) unless $params{'action'} eq 'summary';
 883                         delete $params{'action'};
 884                 }
 885
 886                 # Next, we put hash_parent_base:/file_parent..hash_base:/file_name,
 887                 # stripping nonexistent or useless pieces
 888                 $href .= "/" if ($params{'hash_base'} || $params{'hash_parent_base'}
 889                         || $params{'hash_parent'} || $params{'hash'});
 890                 if (defined $params{'hash_base'}) {
 891                         if (defined $params{'hash_parent_base'}) {
 892                                 $href .= esc_url($params{'hash_parent_base'});
 893                                 # skip the file_parent if it's the same as the file_name
 894                                 delete $params{'file_parent'} if $params{'file_parent'} eq $params{'file_name'};
 895                                 if (defined $params{'file_parent'} && $params{'file_parent'} !~ /\.\./) {
 896                                         $href .= ":/".esc_url($params{'file_parent'});
 897                                         delete $params{'file_parent'};
 898                                 }
 899                                 $href .= "..";
 900                                 delete $params{'hash_parent'};
 901                                 delete $params{'hash_parent_base'};
 902                         } elsif (defined $params{'hash_parent'}) {
 903                                 $href .= esc_url($params{'hash_parent'}). "..";
 904                                 delete $params{'hash_parent'};
 905                         }
 906
 907                         $href .= esc_url($params{'hash_base'});
 908                         if (defined $params{'file_name'} && $params{'file_name'} !~ /\.\./) {
 909                                 $href .= ":/".esc_url($params{'file_name'});
 910                                 delete $params{'file_name'};
 911                         }
 912                         delete $params{'hash'};
 913                         delete $params{'hash_base'};
 914                 } elsif (defined $params{'hash'}) {
 915                         $href .= esc_url($params{'hash'});
 916                         delete $params{'hash'};
 917                 }
 918
 919                 # If the action was a snapshot, we can absorb the
 920                 # snapshot_format parameter too
 921                 if ($is_snapshot) {
 922                         my $fmt = $params{'snapshot_format'};
 923                         # snapshot_format should always be defined when href()
 924                         # is called, but just in case some code forgets, we
 925                         # fall back to the default
 926                         $fmt ||= $snapshot_fmts[0];
 927                         $href .= $known_snapshot_formats{$fmt}{'suffix'};
 928                         delete $params{'snapshot_format'};
 929                 }
 930         }
 931
 932         # now encode the parameters explicitly
 933         my @result = ();
 934         for (my $i = 0; $i < @cgi_param_mapping; $i += 2) {
 935                 my ($name, $symbol) = ($cgi_param_mapping[$i], $cgi_param_mapping[$i+1]);
 936                 if (defined $params{$name}) {
 937                         if (ref($params{$name}) eq "ARRAY") {
 938                                 foreach my $par (@{$params{$name}}) {
 939                                         push @result, $symbol . "=" . esc_param($par);
 940                                 }
 941                         } else {
 942                                 push @result, $symbol . "=" . esc_param($params{$name});
 943                         }
 944                 }
 945         }
 946         $href .= "?" . join(';', @result) if scalar @result;
 947
 948         return $href;
 949 }
 950
 951
 952 ## ======================================================================
 953 ## validation, quoting/unquoting and escaping
 954
 955 sub validate_action {
 956         my $input = shift || return undef;
 957         return undef unless exists $actions{$input};
 958         return $input;
 959 }
 960
 961 sub validate_project {
 962         my $input = shift || return undef;
 963         if (!validate_pathname($input) ||
 964                 !(-d "$projectroot/$input") ||
 965                 !check_export_ok("$projectroot/$input") ||
 966                 ($strict_export && !project_in_list($input))) {
 967                 return undef;
 968         } else {
 969                 return $input;
 970         }
 971 }
 972
 973 sub validate_pathname {
 974         my $input = shift || return undef;
 975
 976         # no '.' or '..' as elements of path, i.e. no '.' nor '..'
 977         # at the beginning, at the end, and between slashes.
 978         # also this catches doubled slashes
 979         if ($input =~ m!(^|/)(|\.|\.\.)(/|$)!) {
 980                 return undef;
 981         }
 982         # no null characters
 983         if ($input =~ m!\0!) {
 984                 return undef;
 985         }
 986         return $input;
 987 }
 988
 989 sub validate_refname {
 990         my $input = shift || return undef;
 991
 992         # textual hashes are O.K.
 993         if ($input =~ m/^[0-9a-fA-F]{40}$/) {
 994                 return $input;
 995         }
 996         # it must be correct pathname
 997         $input = validate_pathname($input)
 998                 or return undef;
 999         # restrictions on ref name according to git-check-ref-format
1000         if ($input =~ m!(/\.|\.\.|[\000-\040\177 ~^:?*\[]|/$)!) {
1001                 return undef;
1002         }
1003         return $input;
1004 }
1005
1006 # decode sequences of octets in utf8 into Perl's internal form,
1007 # which is utf-8 with utf8 flag set if needed.  gitweb writes out
1008 # in utf-8 thanks to "binmode STDOUT, ':utf8'" at beginning
1009 sub to_utf8 {
1010         my $str = shift;
1011         if (utf8::valid($str)) {
1012                 utf8::decode($str);
1013                 return $str;
1014         } else {
1015                 return decode($fallback_encoding, $str, Encode::FB_DEFAULT);
1016         }
1017 }
1018
1019 # quote unsafe chars, but keep the slash, even when it's not
1020 # correct, but quoted slashes look too horrible in bookmarks
1021 sub esc_param {
1022         my $str = shift;
1023         $str =~ s/([^A-Za-z0-9\-_.~()\/:@])/sprintf("%%%02X", ord($1))/eg;
1024         $str =~ s/\+/%2B/g;
1025         $str =~ s/ /\+/g;
1026         return $str;
1027 }
1028
1029 # quote unsafe chars in whole URL, so some charactrs cannot be quoted
1030 sub esc_url {
1031         my $str = shift;
1032         $str =~ s/([^A-Za-z0-9\-_.~();\/;?:@&=])/sprintf("%%%02X", ord($1))/eg;
1033         $str =~ s/\+/%2B/g;
1034         $str =~ s/ /\+/g;
1035         return $str;
1036 }
1037
1038 # replace invalid utf8 character with SUBSTITUTION sequence
1039 sub esc_html ($;%) {
1040         my $str = shift;
1041         my %opts = @_;
1042
1043         $str = to_utf8($str);
1044         $str = $cgi->escapeHTML($str);
1045         if ($opts{'-nbsp'}) {
1046                 $str =~ s/ /&nbsp;/g;
1047         }
1048         $str =~ s|([[:cntrl:]])|(($1 ne "\t") ? quot_cec($1) : $1)|eg;
1049         return $str;
1050 }
1051
1052 # quote control characters and escape filename to HTML
1053 sub esc_path {
1054         my $str = shift;
1055         my %opts = @_;
1056
1057         $str = to_utf8($str);
1058         $str = $cgi->escapeHTML($str);
1059         if ($opts{'-nbsp'}) {
1060                 $str =~ s/ /&nbsp;/g;
1061         }
1062         $str =~ s|([[:cntrl:]])|quot_cec($1)|eg;
1063         return $str;
1064 }
1065
1066 # Make control characters "printable", using character escape codes (CEC)
1067 sub quot_cec {
1068         my $cntrl = shift;
1069         my %opts = @_;
1070         my %es = ( # character escape codes, aka escape sequences
1071                 "\t" => '\t',   # tab            (HT)
1072                 "\n" => '\n',   # line feed      (LF)
1073                 "\r" => '\r',   # carrige return (CR)
1074                 "\f" => '\f',   # form feed      (FF)
1075                 "\b" => '\b',   # backspace      (BS)
1076                 "\a" => '\a',   # alarm (bell)   (BEL)
1077                 "\e" => '\e',   # escape         (ESC)
1078                 "\013" => '\v', # vertical tab   (VT)
1079                 "\000" => '\0', # nul character  (NUL)
1080         );
1081         my $chr = ( (exists $es{$cntrl})
1082                     ? $es{$cntrl}
1083                     : sprintf('\%2x', ord($cntrl)) );
1084         if ($opts{-nohtml}) {
1085                 return $chr;
1086         } else {
1087                 return "<span class=\"cntrl\">$chr</span>";
1088         }
1089 }
1090
1091 # Alternatively use unicode control pictures codepoints,
1092 # Unicode "printable representation" (PR)
1093 sub quot_upr {
1094         my $cntrl = shift;
1095         my %opts = @_;
1096
1097         my $chr = sprintf('&#%04d;', 0x2400+ord($cntrl));
1098         if ($opts{-nohtml}) {
1099                 return $chr;
1100         } else {
1101                 return "<span class=\"cntrl\">$chr</span>";
1102         }
1103 }
1104
1105 # git may return quoted and escaped filenames
1106 sub unquote {
1107         my $str = shift;
1108
1109         sub unq {
1110                 my $seq = shift;
1111                 my %es = ( # character escape codes, aka escape sequences
1112                         't' => "\t",   # tab            (HT, TAB)
1113                         'n' => "\n",   # newline        (NL)
1114                         'r' => "\r",   # return         (CR)
1115                         'f' => "\f",   # form feed      (FF)
1116                         'b' => "\b",   # backspace      (BS)
1117                         'a' => "\a",   # alarm (bell)   (BEL)
1118                         'e' => "\e",   # escape         (ESC)
1119                         'v' => "\013", # vertical tab   (VT)
1120                 );
1121
1122                 if ($seq =~ m/^[0-7]{1,3}$/) {
1123                         # octal char sequence
1124                         return chr(oct($seq));
1125                 } elsif (exists $es{$seq}) {
1126                         # C escape sequence, aka character escape code
1127                         return $es{$seq};
1128                 }
1129                 # quoted ordinary character
1130                 return $seq;
1131         }
1132
1133         if ($str =~ m/^"(.*)"$/) {
1134                 # needs unquoting
1135                 $str = $1;
1136                 $str =~ s/\\([^0-7]|[0-7]{1,3})/unq($1)/eg;
1137         }
1138         return $str;
1139 }
1140
1141 # escape tabs (convert tabs to spaces)
1142 sub untabify {
1143         my $line = shift;
1144
1145         while ((my $pos = index($line, "\t")) != -1) {
1146                 if (my $count = (8 - ($pos % 8))) {
1147                         my $spaces = ' ' x $count;
1148                         $line =~ s/\t/$spaces/;
1149                 }
1150         }
1151
1152         return $line;
1153 }
1154
1155 sub project_in_list {
1156         my $project = shift;
1157         my @list = git_get_projects_list();
1158         return @list && scalar(grep { $_->{'path'} eq $project } @list);
1159 }
1160
1161 ## ----------------------------------------------------------------------
1162 ## HTML aware string manipulation
1163
1164 # Try to chop given string on a word boundary between position
1165 # $len and $len+$add_len. If there is no word boundary there,
1166 # chop at $len+$add_len. Do not chop if chopped part plus ellipsis
1167 # (marking chopped part) would be longer than given string.
1168 sub chop_str {
1169         my $str = shift;
1170         my $len = shift;
1171         my $add_len = shift || 10;
1172         my $where = shift || 'right'; # 'left' | 'center' | 'right'
1173
1174         # Make sure perl knows it is utf8 encoded so we don't
1175         # cut in the middle of a utf8 multibyte char.
1176         $str = to_utf8($str);
1177
1178         # allow only $len chars, but don't cut a word if it would fit in $add_len
1179         # if it doesn't fit, cut it if it's still longer than the dots we would add
1180         # remove chopped character entities entirely
1181
1182         # when chopping in the middle, distribute $len into left and right part
1183         # return early if chopping wouldn't make string shorter
1184         if ($where eq 'center') {
1185                 return $str if ($len + 5 >= length($str)); # filler is length 5
1186                 $len = int($len/2);
1187         } else {
1188                 return $str if ($len + 4 >= length($str)); # filler is length 4
1189         }
1190
1191         # regexps: ending and beginning with word part up to $add_len
1192         my $endre = qr/.{$len}\w{0,$add_len}/;
1193         my $begre = qr/\w{0,$add_len}.{$len}/;
1194
1195         if ($where eq 'left') {
1196                 $str =~ m/^(.*?)($begre)$/;
1197                 my ($lead, $body) = ($1, $2);
1198                 if (length($lead) > 4) {
1199                         $body =~ s/^[^;]*;// if ($lead =~ m/&[^;]*$/);
1200                         $lead = " ...";
1201                 }
1202                 return "$lead$body";
1203
1204         } elsif ($where eq 'center') {
1205                 $str =~ m/^($endre)(.*)$/;
1206                 my ($left, $str)  = ($1, $2);
1207                 $str =~ m/^(.*?)($begre)$/;
1208                 my ($mid, $right) = ($1, $2);
1209                 if (length($mid) > 5) {
1210                         $left  =~ s/&[^;]*$//;
1211                         $right =~ s/^[^;]*;// if ($mid =~ m/&[^;]*$/);
1212                         $mid = " ... ";
1213                 }
1214                 return "$left$mid$right";
1215
1216         } else {
1217                 $str =~ m/^($endre)(.*)$/;
1218                 my $body = $1;
1219                 my $tail = $2;
1220                 if (length($tail) > 4) {
1221                         $body =~ s/&[^;]*$//;
1222                         $tail = "... ";
1223                 }
1224                 return "$body$tail";
1225         }
1226 }
1227
1228 # takes the same arguments as chop_str, but also wraps a <span> around the
1229 # result with a title attribute if it does get chopped. Additionally, the
1230 # string is HTML-escaped.
1231 sub chop_and_escape_str {
1232         my ($str) = @_;
1233
1234         my $chopped = chop_str(@_);
1235         if ($chopped eq $str) {
1236                 return esc_html($chopped);
1237         } else {
1238                 $str =~ s/([[:cntrl:]])/?/g;
1239                 return $cgi->span({-title=>$str}, esc_html($chopped));
1240         }
1241 }
1242
1243 ## ----------------------------------------------------------------------
1244 ## functions returning short strings
1245
1246 # CSS class for given age value (in seconds)
1247 sub age_class {
1248         my $age = shift;
1249
1250         if (!defined $age) {
1251                 return "noage";
1252         } elsif ($age < 60*60*2) {
1253                 return "age0";
1254         } elsif ($age < 60*60*24*2) {
1255                 return "age1";
1256         } else {
1257                 return "age2";
1258         }
1259 }
1260
1261 # convert age in seconds to "nn units ago" string
1262 sub age_string {
1263         my $age = shift;
1264         my $age_str;
1265
1266         if ($age > 60*60*24*365*2) {
1267                 $age_str = (int $age/60/60/24/365);
1268                 $age_str .= " years ago";
1269         } elsif ($age > 60*60*24*(365/12)*2) {
1270                 $age_str = int $age/60/60/24/(365/12);
1271                 $age_str .= " months ago";
1272         } elsif ($age > 60*60*24*7*2) {
1273                 $age_str = int $age/60/60/24/7;
1274                 $age_str .= " weeks ago";
1275         } elsif ($age > 60*60*24*2) {
1276                 $age_str = int $age/60/60/24;
1277                 $age_str .= " days ago";
1278         } elsif ($age > 60*60*2) {
1279                 $age_str = int $age/60/60;
1280                 $age_str .= " hours ago";
1281         } elsif ($age > 60*2) {
1282                 $age_str = int $age/60;
1283                 $age_str .= " min ago";
1284         } elsif ($age > 2) {
1285                 $age_str = int $age;
1286                 $age_str .= " sec ago";
1287         } else {
1288                 $age_str .= " right now";
1289         }
1290         return $age_str;
1291 }
1292
1293 use constant {
1294         S_IFINVALID => 0030000,
1295         S_IFGITLINK => 0160000,
1296 };
1297
1298 # submodule/subproject, a commit object reference
1299 sub S_ISGITLINK($) {
1300         my $mode = shift;
1301
1302         return (($mode & S_IFMT) == S_IFGITLINK)
1303 }
1304
1305 # convert file mode in octal to symbolic file mode string
1306 sub mode_str {
1307         my $mode = oct shift;
1308
1309         if (S_ISGITLINK($mode)) {
1310                 return 'm---------';
1311         } elsif (S_ISDIR($mode & S_IFMT)) {
1312                 return 'drwxr-xr-x';
1313         } elsif (S_ISLNK($mode)) {
1314                 return 'lrwxrwxrwx';
1315         } elsif (S_ISREG($mode)) {
1316                 # git cares only about the executable bit
1317                 if ($mode & S_IXUSR) {
1318                         return '-rwxr-xr-x';
1319                 } else {
1320                         return '-rw-r--r--';
1321                 };
1322         } else {
1323                 return '----------';
1324         }
1325 }
1326
1327 # convert file mode in octal to file type string
1328 sub file_type {
1329         my $mode = shift;
1330
1331         if ($mode !~ m/^[0-7]+$/) {
1332                 return $mode;
1333         } else {
1334                 $mode = oct $mode;
1335         }
1336
1337         if (S_ISGITLINK($mode)) {
1338                 return "submodule";
1339         } elsif (S_ISDIR($mode & S_IFMT)) {
1340                 return "directory";
1341         } elsif (S_ISLNK($mode)) {
1342                 return "symlink";
1343         } elsif (S_ISREG($mode)) {
1344                 return "file";
1345         } else {
1346                 return "unknown";
1347         }
1348 }
1349
1350 # convert file mode in octal to file type description string
1351 sub file_type_long {
1352         my $mode = shift;
1353
1354         if ($mode !~ m/^[0-7]+$/) {
1355                 return $mode;
1356         } else {
1357                 $mode = oct $mode;
1358         }
1359
1360         if (S_ISGITLINK($mode)) {
1361                 return "submodule";
1362         } elsif (S_ISDIR($mode & S_IFMT)) {
1363                 return "directory";
1364         } elsif (S_ISLNK($mode)) {
1365                 return "symlink";
1366         } elsif (S_ISREG($mode)) {
1367                 if ($mode & S_IXUSR) {
1368                         return "executable";
1369                 } else {
1370                         return "file";
1371                 };
1372         } else {
1373                 return "unknown";
1374         }
1375 }
1376
1377
1378 ## ----------------------------------------------------------------------
1379 ## functions returning short HTML fragments, or transforming HTML fragments
1380 ## which don't belong to other sections
1381
1382 # format line of commit message.
1383 sub format_log_line_html {
1384         my $line = shift;
1385
1386         $line = esc_html($line, -nbsp=>1);
1387         if ($line =~ m/\b([0-9a-fA-F]{8,40})\b/) {
1388                 my $hash_text = $1;
1389                 my $link =
1390                         $cgi->a({-href => href(action=>"object", hash=>$hash_text),
1391                                 -class => "text"}, $hash_text);
1392                 $line =~ s/$hash_text/$link/;
1393         }
1394         return $line;
1395 }
1396
1397 # format marker of refs pointing to given object
1398
1399 # the destination action is chosen based on object type and current context:
1400 # - for annotated tags, we choose the tag view unless it's the current view
1401 #   already, in which case we go to shortlog view
1402 # - for other refs, we keep the current view if we're in history, shortlog or
1403 #   log view, and select shortlog otherwise
1404 sub format_ref_marker {
1405         my ($refs, $id) = @_;
1406         my $markers = '';
1407
1408         if (defined $refs->{$id}) {
1409                 foreach my $ref (@{$refs->{$id}}) {
1410                         # this code exploits the fact that non-lightweight tags are the
1411                         # only indirect objects, and that they are the only objects for which
1412                         # we want to use tag instead of shortlog as action
1413                         my ($type, $name) = qw();
1414                         my $indirect = ($ref =~ s/\^\{\}$//);
1415                         # e.g. tags/v2.6.11 or heads/next
1416                         if ($ref =~ m!^(.*?)s?/(.*)$!) {
1417                                 $type = $1;
1418                                 $name = $2;
1419                         } else {
1420                                 $type = "ref";
1421                                 $name = $ref;
1422                         }
1423
1424                         my $class = $type;
1425                         $class .= " indirect" if $indirect;
1426
1427                         my $dest_action = "shortlog";
1428
1429                         if ($indirect) {
1430                                 $dest_action = "tag" unless $action eq "tag";
1431                         } elsif ($action =~ /^(history|(short)?log)$/) {
1432                                 $dest_action = $action;
1433                         }
1434
1435                         my $dest = "";
1436                         $dest .= "refs/" unless $ref =~ m!^refs/!;
1437                         $dest .= $ref;
1438
1439                         my $link = $cgi->a({
1440                                 -href => href(
1441                                         action=>$dest_action,
1442                                         hash=>$dest
1443                                 )}, $name);
1444
1445                         $markers .= " <span class=\"$class\" title=\"$ref\">" .
1446                                 $link . "</span>";
1447                 }
1448         }
1449
1450         if ($markers) {
1451                 return ' <span class="refs">'. $markers . '</span>';
1452         } else {
1453                 return "";
1454         }
1455 }
1456
1457 # format, perhaps shortened and with markers, title line
1458 sub format_subject_html {
1459         my ($long, $short, $href, $extra) = @_;
1460         $extra = '' unless defined($extra);
1461
1462         if (length($short) < length($long)) {
1463                 return $cgi->a({-href => $href, -class => "list subject",
1464                                 -title => to_utf8($long)},
1465                        esc_html($short) . $extra);
1466         } else {
1467                 return $cgi->a({-href => $href, -class => "list subject"},
1468                        esc_html($long)  . $extra);
1469         }
1470 }
1471
1472 # format git diff header line, i.e. "diff --(git|combined|cc) ..."
1473 sub format_git_diff_header_line {
1474         my $line = shift;
1475         my $diffinfo = shift;
1476         my ($from, $to) = @_;
1477
1478         if ($diffinfo->{'nparents'}) {
1479                 # combined diff
1480                 $line =~ s!^(diff (.*?) )"?.*$!$1!;
1481                 if ($to->{'href'}) {
1482                         $line .= $cgi->a({-href => $to->{'href'}, -class => "path"},
1483                                          esc_path($to->{'file'}));
1484                 } else { # file was deleted (no href)
1485                         $line .= esc_path($to->{'file'});
1486                 }
1487         } else {
1488                 # "ordinary" diff
1489                 $line =~ s!^(diff (.*?) )"?a/.*$!$1!;
1490                 if ($from->{'href'}) {
1491                         $line .= $cgi->a({-href => $from->{'href'}, -class => "path"},
1492                                          'a/' . esc_path($from->{'file'}));
1493                 } else { # file was added (no href)
1494                         $line .= 'a/' . esc_path($from->{'file'});
1495                 }
1496                 $line .= ' ';
1497                 if ($to->{'href'}) {
1498                         $line .= $cgi->a({-href => $to->{'href'}, -class => "path"},
1499                                          'b/' . esc_path($to->{'file'}));
1500                 } else { # file was deleted
1501                         $line .= 'b/' . esc_path($to->{'file'});
1502                 }
1503         }
1504
1505         return "<div class=\"diff header\">$line</div>\n";
1506 }
1507
1508 # format extended diff header line, before patch itself
1509 sub format_extended_diff_header_line {
1510         my $line = shift;
1511         my $diffinfo = shift;
1512         my ($from, $to) = @_;
1513
1514         # match <path>
1515         if ($line =~ s!^((copy|rename) from ).*$!$1! && $from->{'href'}) {
1516                 $line .= $cgi->a({-href=>$from->{'href'}, -class=>"path"},
1517                                        esc_path($from->{'file'}));
1518         }
1519         if ($line =~ s!^((copy|rename) to ).*$!$1! && $to->{'href'}) {
1520                 $line .= $cgi->a({-href=>$to->{'href'}, -class=>"path"},
1521                                  esc_path($to->{'file'}));
1522         }
1523         # match single <mode>
1524         if ($line =~ m/\s(\d{6})$/) {
1525                 $line .= '<span class="info"> (' .
1526                          file_type_long($1) .
1527                          ')</span>';
1528         }
1529         # match <hash>
1530         if ($line =~ m/^index [0-9a-fA-F]{40},[0-9a-fA-F]{40}/) {
1531                 # can match only for combined diff
1532                 $line = 'index ';
1533                 for (my $i = 0; $i < $diffinfo->{'nparents'}; $i++) {
1534                         if ($from->{'href'}[$i]) {
1535                                 $line .= $cgi->a({-href=>$from->{'href'}[$i],
1536                                                   -class=>"hash"},
1537                                                  substr($diffinfo->{'from_id'}[$i],0,7));
1538                         } else {
1539                                 $line .= '0' x 7;
1540                         }
1541                         # separator
1542                         $line .= ',' if ($i < $diffinfo->{'nparents'} - 1);
1543                 }
1544                 $line .= '..';
1545                 if ($to->{'href'}) {
1546                         $line .= $cgi->a({-href=>$to->{'href'}, -class=>"hash"},
1547                                          substr($diffinfo->{'to_id'},0,7));
1548                 } else {
1549                         $line .= '0' x 7;
1550                 }
1551
1552         } elsif ($line =~ m/^index [0-9a-fA-F]{40}..[0-9a-fA-F]{40}/) {
1553                 # can match only for ordinary diff
1554                 my ($from_link, $to_link);
1555                 if ($from->{'href'}) {
1556                         $from_link = $cgi->a({-href=>$from->{'href'}, -class=>"hash"},
1557                                              substr($diffinfo->{'from_id'},0,7));
1558                 } else {
1559                         $from_link = '0' x 7;
1560                 }
1561                 if ($to->{'href'}) {
1562                         $to_link = $cgi->a({-href=>$to->{'href'}, -class=>"hash"},
1563                                            substr($diffinfo->{'to_id'},0,7));
1564                 } else {
1565                         $to_link = '0' x 7;
1566                 }
1567                 my ($from_id, $to_id) = ($diffinfo->{'from_id'}, $diffinfo->{'to_id'});
1568                 $line =~ s!$from_id\.\.$to_id!$from_link..$to_link!;
1569         }
1570
1571         return $line . "<br/>\n";
1572 }
1573
1574 # format from-file/to-file diff header
1575 sub format_diff_from_to_header {
1576         my ($from_line, $to_line, $diffinfo, $from, $to, @parents) = @_;
1577         my $line;
1578         my $result = '';
1579
1580         $line = $from_line;
1581         #assert($line =~ m/^---/) if DEBUG;
1582         # no extra formatting for "^--- /dev/null"
1583         if (! $diffinfo->{'nparents'}) {
1584                 # ordinary (single parent) diff
1585                 if ($line =~ m!^--- "?a/!) {
1586                         if ($from->{'href'}) {
1587                                 $line = '--- a/' .
1588                                         $cgi->a({-href=>$from->{'href'}, -class=>"path"},
1589                                                 esc_path($from->{'file'}));
1590                         } else {
1591                                 $line = '--- a/' .
1592                                         esc_path($from->{'file'});
1593                         }
1594                 }
1595                 $result .= qq!<div class="diff from_file">$line</div>\n!;
1596
1597         } else {
1598                 # combined diff (merge commit)
1599                 for (my $i = 0; $i < $diffinfo->{'nparents'}; $i++) {
1600                         if ($from->{'href'}[$i]) {
1601                                 $line = '--- ' .
1602                                         $cgi->a({-href=>href(action=>"blobdiff",
1603                                                              hash_parent=>$diffinfo->{'from_id'}[$i],
1604                                                              hash_parent_base=>$parents[$i],
1605                                                              file_parent=>$from->{'file'}[$i],
1606                                                              hash=>$diffinfo->{'to_id'},
1607                                                              hash_base=>$hash,
1608                                                              file_name=>$to->{'file'}),
1609                                                  -class=>"path",
1610                                                  -title=>"diff" . ($i+1)},
1611                                                 $i+1) .
1612                                         '/' .
1613                                         $cgi->a({-href=>$from->{'href'}[$i], -class=>"path"},
1614                                                 esc_path($from->{'file'}[$i]));
1615                         } else {
1616                                 $line = '--- /dev/null';
1617                         }
1618                         $result .= qq!<div class="diff from_file">$line</div>\n!;
1619                 }
1620         }
1621
1622         $line = $to_line;
1623         #assert($line =~ m/^\+\+\+/) if DEBUG;
1624         # no extra formatting for "^+++ /dev/null"
1625         if ($line =~ m!^\+\+\+ "?b/!) {
1626                 if ($to->{'href'}) {
1627                         $line = '+++ b/' .
1628                                 $cgi->a({-href=>$to->{'href'}, -class=>"path"},
1629                                         esc_path($to->{'file'}));
1630                 } else {
1631                         $line = '+++ b/' .
1632                                 esc_path($to->{'file'});
1633                 }
1634         }
1635         $result .= qq!<div class="diff to_file">$line</div>\n!;
1636
1637         return $result;
1638 }
1639
1640 # create note for patch simplified by combined diff
1641 sub format_diff_cc_simplified {
1642         my ($diffinfo, @parents) = @_;
1643         my $result = '';
1644
1645         $result .= "<div class=\"diff header\">" .
1646                    "diff --cc ";
1647         if (!is_deleted($diffinfo)) {
1648                 $result .= $cgi->a({-href => href(action=>"blob",
1649                                                   hash_base=>$hash,
1650                                                   hash=>$diffinfo->{'to_id'},
1651                                                   file_name=>$diffinfo->{'to_file'}),
1652                                     -class => "path"},
1653                                    esc_path($diffinfo->{'to_file'}));
1654         } else {
1655                 $result .= esc_path($diffinfo->{'to_file'});
1656         }
1657         $result .= "</div>\n" . # class="diff header"
1658                    "<div class=\"diff nodifferences\">" .
1659                    "Simple merge" .
1660                    "</div>\n"; # class="diff nodifferences"
1661
1662         return $result;
1663 }
1664
1665 # format patch (diff) line (not to be used for diff headers)
1666 sub format_diff_line {
1667         my $line = shift;
1668         my ($from, $to) = @_;
1669         my $diff_class = "";
1670
1671         chomp $line;
1672
1673         if ($from && $to && ref($from->{'href'}) eq "ARRAY") {
1674                 # combined diff
1675                 my $prefix = substr($line, 0, scalar @{$from->{'href'}});
1676                 if ($line =~ m/^\@{3}/) {
1677                         $diff_class = " chunk_header";
1678                 } elsif ($line =~ m/^\\/) {
1679                         $diff_class = " incomplete";
1680                 } elsif ($prefix =~ tr/+/+/) {
1681                         $diff_class = " add";
1682                 } elsif ($prefix =~ tr/-/-/) {
1683                         $diff_class = " rem";
1684                 }
1685         } else {
1686                 # assume ordinary diff
1687                 my $char = substr($line, 0, 1);
1688                 if ($char eq '+') {
1689                         $diff_class = " add";
1690                 } elsif ($char eq '-') {
1691                         $diff_class = " rem";
1692                 } elsif ($char eq '@') {
1693                         $diff_class = " chunk_header";
1694                 } elsif ($char eq "\\") {
1695                         $diff_class = " incomplete";
1696                 }
1697         }
1698         $line = untabify($line);
1699         if ($from && $to && $line =~ m/^\@{2} /) {
1700                 my ($from_text, $from_start, $from_lines, $to_text, $to_start, $to_lines, $section) =
1701                         $line =~ m/^\@{2} (-(\d+)(?:,(\d+))?) (\+(\d+)(?:,(\d+))?) \@{2}(.*)$/;
1702
1703                 $from_lines = 0 unless defined $from_lines;
1704                 $to_lines   = 0 unless defined $to_lines;
1705
1706                 if ($from->{'href'}) {
1707                         $from_text = $cgi->a({-href=>"$from->{'href'}#l$from_start",
1708                                              -class=>"list"}, $from_text);
1709                 }
1710                 if ($to->{'href'}) {
1711                         $to_text   = $cgi->a({-href=>"$to->{'href'}#l$to_start",
1712                                              -class=>"list"}, $to_text);
1713                 }
1714                 $line = "<span class=\"chunk_info\">@@ $from_text $to_text @@</span>" .
1715                         "<span class=\"section\">" . esc_html($section, -nbsp=>1) . "</span>";
1716                 return "<div class=\"diff$diff_class\">$line</div>\n";
1717         } elsif ($from && $to && $line =~ m/^\@{3}/) {
1718                 my ($prefix, $ranges, $section) = $line =~ m/^(\@+) (.*?) \@+(.*)$/;
1719                 my (@from_text, @from_start, @from_nlines, $to_text, $to_start, $to_nlines);
1720
1721                 @from_text = split(' ', $ranges);
1722                 for (my $i = 0; $i < @from_text; ++$i) {
1723                         ($from_start[$i], $from_nlines[$i]) =
1724                                 (split(',', substr($from_text[$i], 1)), 0);
1725                 }
1726
1727                 $to_text   = pop @from_text;
1728                 $to_start  = pop @from_start;
1729                 $to_nlines = pop @from_nlines;
1730
1731                 $line = "<span class=\"chunk_info\">$prefix ";
1732                 for (my $i = 0; $i < @from_text; ++$i) {
1733                         if ($from->{'href'}[$i]) {
1734                                 $line .= $cgi->a({-href=>"$from->{'href'}[$i]#l$from_start[$i]",
1735                                                   -class=>"list"}, $from_text[$i]);
1736                         } else {
1737                                 $line .= $from_text[$i];
1738                         }
1739                         $line .= " ";
1740                 }
1741                 if ($to->{'href'}) {
1742                         $line .= $cgi->a({-href=>"$to->{'href'}#l$to_start",
1743                                           -class=>"list"}, $to_text);
1744                 } else {
1745                         $line .= $to_text;
1746                 }
1747                 $line .= " $prefix</span>" .
1748                          "<span class=\"section\">" . esc_html($section, -nbsp=>1) . "</span>";
1749                 return "<div class=\"diff$diff_class\">$line</div>\n";
1750         }
1751         return "<div class=\"diff$diff_class\">" . esc_html($line, -nbsp=>1) . "</div>\n";
1752 }
1753
1754 # Generates undef or something like "_snapshot_" or "snapshot (_tbz2_ _zip_)",
1755 # linked.  Pass the hash of the tree/commit to snapshot.
1756 sub format_snapshot_links {
1757         my ($hash) = @_;
1758         my $num_fmts = @snapshot_fmts;
1759         if ($num_fmts > 1) {
1760                 # A parenthesized list of links bearing format names.
1761                 # e.g. "snapshot (_tar.gz_ _zip_)"
1762                 return "snapshot (" . join(' ', map
1763                         $cgi->a({
1764                                 -href => href(
1765                                         action=>"snapshot",
1766                                         hash=>$hash,
1767                                         snapshot_format=>$_
1768                                 )
1769                         }, $known_snapshot_formats{$_}{'display'})
1770                 , @snapshot_fmts) . ")";
1771         } elsif ($num_fmts == 1) {
1772                 # A single "snapshot" link whose tooltip bears the format name.
1773                 # i.e. "_snapshot_"
1774                 my ($fmt) = @snapshot_fmts;
1775                 return
1776                         $cgi->a({
1777                                 -href => href(
1778                                         action=>"snapshot",
1779                                         hash=>$hash,
1780                                         snapshot_format=>$fmt
1781                                 ),
1782                                 -title => "in format: $known_snapshot_formats{$fmt}{'display'}"
1783                         }, "snapshot");
1784         } else { # $num_fmts == 0
1785                 return undef;
1786         }
1787 }
1788
1789 ## ......................................................................
1790 ## functions returning values to be passed, perhaps after some
1791 ## transformation, to other functions; e.g. returning arguments to href()
1792
1793 # returns hash to be passed to href to generate gitweb URL
1794 # in -title key it returns description of link
1795 sub get_feed_info {
1796         my $format = shift || 'Atom';
1797         my %res = (action => lc($format));
1798
1799         # feed links are possible only for project views
1800         return unless (defined $project);
1801         # some views should link to OPML, or to generic project feed,
1802         # or don't have specific feed yet (so they should use generic)
1803         return if ($action =~ /^(?:tags|heads|forks|tag|search)$/x);
1804
1805         my $branch;
1806         # branches refs uses 'refs/heads/' prefix (fullname) to differentiate
1807         # from tag links; this also makes possible to detect branch links
1808         if ((defined $hash_base && $hash_base =~ m!^refs/heads/(.*)$!) ||
1809             (defined $hash      && $hash      =~ m!^refs/heads/(.*)$!)) {
1810                 $branch = $1;
1811         }
1812         # find log type for feed description (title)
1813         my $type = 'log';
1814         if (defined $file_name) {
1815                 $type  = "history of $file_name";
1816                 $type .= "/" if ($action eq 'tree');
1817                 $type .= " on '$branch'" if (defined $branch);
1818         } else {
1819                 $type = "log of $branch" if (defined $branch);
1820         }
1821
1822         $res{-title} = $type;
1823         $res{'hash'} = (defined $branch ? "refs/heads/$branch" : undef);
1824         $res{'file_name'} = $file_name;
1825
1826         return %res;
1827 }
1828
1829 ## ----------------------------------------------------------------------
1830 ## git utility subroutines, invoking git commands
1831
1832 # returns path to the core git executable and the --git-dir parameter as list
1833 sub git_cmd {
1834         return $GIT, '--git-dir='.$git_dir;
1835 }
1836
1837 # quote the given arguments for passing them to the shell
1838 # quote_command("command", "arg 1", "arg with ' and ! characters")
1839 # => "'command' 'arg 1' 'arg with '\'' and '\!' characters'"
1840 # Try to avoid using this function wherever possible.
1841 sub quote_command {
1842         return join(' ',
1843                     map( { my $a = $_; $a =~ s/(['!])/'\\$1'/g; "'$a'" } @_ ));
1844 }
1845
1846 # get HEAD ref of given project as hash
1847 sub git_get_head_hash {
1848         my $project = shift;
1849         my $o_git_dir = $git_dir;
1850         my $retval = undef;
1851         $git_dir = "$projectroot/$project";
1852         if (open my $fd, "-|", git_cmd(), "rev-parse", "--verify", "HEAD") {
1853                 my $head = <$fd>;
1854                 close $fd;
1855                 if (defined $head && $head =~ /^([0-9a-fA-F]{40})$/) {
1856                         $retval = $1;
1857                 }
1858         }
1859         if (defined $o_git_dir) {
1860                 $git_dir = $o_git_dir;
1861         }
1862         return $retval;
1863 }
1864
1865 # get type of given object
1866 sub git_get_type {
1867         my $hash = shift;
1868
1869         open my $fd, "-|", git_cmd(), "cat-file", '-t', $hash or return;
1870         my $type = <$fd>;
1871         close $fd or return;
1872         chomp $type;
1873         return $type;
1874 }
1875
1876 # repository configuration
1877 our $config_file = '';
1878 our %config;
1879
1880 # store multiple values for single key as anonymous array reference
1881 # single values stored directly in the hash, not as [ <value> ]
1882 sub hash_set_multi {
1883         my ($hash, $key, $value) = @_;
1884
1885         if (!exists $hash->{$key}) {
1886                 $hash->{$key} = $value;
1887         } elsif (!ref $hash->{$key}) {
1888                 $hash->{$key} = [ $hash->{$key}, $value ];
1889         } else {
1890                 push @{$hash->{$key}}, $value;
1891         }
1892 }
1893
1894 # return hash of git project configuration
1895 # optionally limited to some section, e.g. 'gitweb'
1896 sub git_parse_project_config {
1897         my $section_regexp = shift;
1898         my %config;
1899
1900         local $/ = "\0";
1901
1902         open my $fh, "-|", git_cmd(), "config", '-z', '-l',
1903                 or return;
1904
1905         while (my $keyval = <$fh>) {
1906                 chomp $keyval;
1907                 my ($key, $value) = split(/\n/, $keyval, 2);
1908
1909                 hash_set_multi(\%config, $key, $value)
1910                         if (!defined $section_regexp || $key =~ /^(?:$section_regexp)\./o);
1911         }
1912         close $fh;
1913
1914         return %config;
1915 }
1916
1917 # convert config value to boolean: 'true' or 'false'
1918 # no value, number > 0, 'true' and 'yes' values are true
1919 # rest of values are treated as false (never as error)
1920 sub config_to_bool {
1921         my $val = shift;
1922
1923         return 1 if !defined $val;             # section.key
1924
1925         # strip leading and trailing whitespace
1926         $val =~ s/^\s+//;
1927         $val =~ s/\s+$//;
1928
1929         return (($val =~ /^\d+$/ && $val) ||   # section.key = 1
1930                 ($val =~ /^(?:true|yes)$/i));  # section.key = true
1931 }
1932
1933 # convert config value to simple decimal number
1934 # an optional value suffix of 'k', 'm', or 'g' will cause the value
1935 # to be multiplied by 1024, 1048576, or 1073741824
1936 sub config_to_int {
1937         my $val = shift;
1938
1939         # strip leading and trailing whitespace
1940         $val =~ s/^\s+//;
1941         $val =~ s/\s+$//;
1942
1943         if (my ($num, $unit) = ($val =~ /^([0-9]*)([kmg])$/i)) {
1944                 $unit = lc($unit);
1945                 # unknown unit is treated as 1
1946                 return $num * ($unit eq 'g' ? 1073741824 :
1947                                $unit eq 'm' ?    1048576 :
1948                                $unit eq 'k' ?       1024 : 1);
1949         }
1950         return $val;
1951 }
1952
1953 # convert config value to array reference, if needed
1954 sub config_to_multi {
1955         my $val = shift;
1956
1957         return ref($val) ? $val : (defined($val) ? [ $val ] : []);
1958 }
1959
1960 sub git_get_project_config {
1961         my ($key, $type) = @_;
1962
1963         # key sanity check
1964         return unless ($key);
1965         $key =~ s/^gitweb\.//;
1966         return if ($key =~ m/\W/);
1967
1968         # type sanity check
1969         if (defined $type) {
1970                 $type =~ s/^--//;
1971                 $type = undef
1972                         unless ($type eq 'bool' || $type eq 'int');
1973         }
1974
1975         # get config
1976         if (!defined $config_file ||
1977             $config_file ne "$git_dir/config") {
1978                 %config = git_parse_project_config('gitweb');
1979                 $config_file = "$git_dir/config";
1980         }
1981
1982         # check if config variable (key) exists
1983         return unless exists $config{"gitweb.$key"};
1984
1985         # ensure given type
1986         if (!defined $type) {
1987                 return $config{"gitweb.$key"};
1988         } elsif ($type eq 'bool') {
1989                 # backward compatibility: 'git config --bool' returns true/false
1990                 return config_to_bool($config{"gitweb.$key"}) ? 'true' : 'false';
1991         } elsif ($type eq 'int') {
1992                 return config_to_int($config{"gitweb.$key"});
1993         }
1994         return $config{"gitweb.$key"};
1995 }
1996
1997 # get hash of given path at given ref
1998 sub git_get_hash_by_path {
1999         my $base = shift;
2000         my $path = shift || return undef;
2001         my $type = shift;
2002
2003         $path =~ s,/+$,,;
2004
2005         open my $fd, "-|", git_cmd(), "ls-tree", $base, "--", $path
2006                 or die_error(500, "Open git-ls-tree failed");
2007         my $line = <$fd>;
2008         close $fd or return undef;
2009
2010         if (!defined $line) {
2011                 # there is no tree or hash given by $path at $base
2012                 return undef;
2013         }
2014
2015         #'100644 blob 0fa3f3a66fb6a137f6ec2c19351ed4d807070ffa  panic.c'
2016         $line =~ m/^([0-9]+) (.+) ([0-9a-fA-F]{40})\t/;
2017         if (defined $type && $type ne $2) {
2018                 # type doesn't match
2019                 return undef;
2020         }
2021         return $3;
2022 }
2023
2024 # get path of entry with given hash at given tree-ish (ref)
2025 # used to get 'from' filename for combined diff (merge commit) for renames
2026 sub git_get_path_by_hash {
2027         my $base = shift || return;
2028         my $hash = shift || return;
2029
2030         local $/ = "\0";
2031
2032         open my $fd, "-|", git_cmd(), "ls-tree", '-r', '-t', '-z', $base
2033                 or return undef;
2034         while (my $line = <$fd>) {
2035                 chomp $line;
2036
2037                 #'040000 tree 595596a6a9117ddba9fe379b6b012b558bac8423  gitweb'
2038                 #'100644 blob e02e90f0429be0d2a69b76571101f20b8f75530f  gitweb/README'
2039                 if ($line =~ m/(?:[0-9]+) (?:.+) $hash\t(.+)$/) {
2040                         close $fd;
2041                         return $1;
2042                 }
2043         }
2044         close $fd;
2045         return undef;
2046 }
2047
2048 ## ......................................................................
2049 ## git utility functions, directly accessing git repository
2050
2051 sub git_get_project_description {
2052         my $path = shift;
2053
2054         $git_dir = "$projectroot/$path";
2055         open my $fd, "$git_dir/description"
2056                 or return git_get_project_config('description');
2057         my $descr = <$fd>;
2058         close $fd;
2059         if (defined $descr) {
2060                 chomp $descr;
2061         }
2062         return $descr;
2063 }
2064
2065 sub git_get_project_ctags {
2066         my $path = shift;
2067         my $ctags = {};
2068
2069         $git_dir = "$projectroot/$path";
2070         unless (opendir D, "$git_dir/ctags") {
2071                 return $ctags;
2072         }
2073         foreach (grep { -f $_ } map { "$git_dir/ctags/$_" } readdir(D)) {
2074                 open CT, $_ or next;
2075                 my $val = <CT>;
2076                 chomp $val;
2077                 close CT;
2078                 my $ctag = $_; $ctag =~ s#.*/##;
2079                 $ctags->{$ctag} = $val;
2080         }
2081         closedir D;
2082         $ctags;
2083 }
2084
2085 sub git_populate_project_tagcloud {
2086         my $ctags = shift;
2087
2088         # First, merge different-cased tags; tags vote on casing
2089         my %ctags_lc;
2090         foreach (keys %$ctags) {
2091                 $ctags_lc{lc $_}->{count} += $ctags->{$_};
2092                 if (not $ctags_lc{lc $_}->{topcount}
2093                     or $ctags_lc{lc $_}->{topcount} < $ctags->{$_}) {
2094                         $ctags_lc{lc $_}->{topcount} = $ctags->{$_};
2095                         $ctags_lc{lc $_}->{topname} = $_;
2096                 }
2097         }
2098
2099         my $cloud;
2100         if (eval { require HTML::TagCloud; 1; }) {
2101                 $cloud = HTML::TagCloud->new;
2102                 foreach (sort keys %ctags_lc) {
2103                         # Pad the title with spaces so that the cloud looks
2104                         # less crammed.
2105                         my $title = $ctags_lc{$_}->{topname};
2106                         $title =~ s/ /&nbsp;/g;
2107                         $title =~ s/^/&nbsp;/g;
2108                         $title =~ s/$/&nbsp;/g;
2109                         $cloud->add($title, $home_link."?by_tag=".$_, $ctags_lc{$_}->{count});
2110                 }
2111         } else {
2112                 $cloud = \%ctags_lc;
2113         }
2114         $cloud;
2115 }
2116
2117 sub git_show_project_tagcloud {
2118         my ($cloud, $count) = @_;
2119         print STDERR ref($cloud)."..\n";
2120         if (ref $cloud eq 'HTML::TagCloud') {
2121                 return $cloud->html_and_css($count);
2122         } else {
2123                 my @tags = sort { $cloud->{$a}->{count} <=> $cloud->{$b}->{count} } keys %$cloud;
2124                 return '<p align="center">' . join (', ', map {
2125                         "<a href=\"$home_link?by_tag=$_\">$cloud->{$_}->{topname}</a>"
2126                 } splice(@tags, 0, $count)) . '</p>';
2127         }
2128 }
2129
2130 sub git_get_project_url_list {
2131         my $path = shift;
2132
2133         $git_dir = "$projectroot/$path";
2134         open my $fd, "$git_dir/cloneurl"
2135                 or return wantarray ?
2136                 @{ config_to_multi(git_get_project_config('url')) } :
2137                    config_to_multi(git_get_project_config('url'));
2138         my @git_project_url_list = map { chomp; $_ } <$fd>;
2139         close $fd;
2140
2141         return wantarray ? @git_project_url_list : \@git_project_url_list;
2142 }
2143
2144 sub git_get_projects_list {
2145         my ($filter) = @_;
2146         my @list;
2147
2148         $filter ||= '';
2149         $filter =~ s/\.git$//;
2150
2151         my $check_forks = gitweb_check_feature('forks');
2152
2153         if (-d $projects_list) {
2154                 # search in directory
2155                 my $dir = $projects_list . ($filter ? "/$filter" : '');
2156                 # remove the trailing "/"
2157                 $dir =~ s!/+$!!;
2158                 my $pfxlen = length("$dir");
2159                 my $pfxdepth = ($dir =~ tr!/!!);
2160
2161                 File::Find::find({
2162                         follow_fast => 1, # follow symbolic links
2163                         follow_skip => 2, # ignore duplicates
2164                         dangling_symlinks => 0, # ignore dangling symlinks, silently
2165                         wanted => sub {
2166                                 # skip project-list toplevel, if we get it.
2167                                 return if (m!^[/.]$!);
2168                                 # only directories can be git repositories
2169                                 return unless (-d $_);
2170                                 # don't traverse too deep (Find is super slow on os x)
2171                                 if (($File::Find::name =~ tr!/!!) - $pfxdepth > $project_maxdepth) {
2172                                         $File::Find::prune = 1;
2173                                         return;
2174                                 }
2175
2176                                 my $subdir = substr($File::Find::name, $pfxlen + 1);
2177                                 # we check related file in $projectroot
2178                                 my $path = ($filter ? "$filter/" : '') . $subdir;
2179                                 if (check_export_ok("$projectroot/$path")) {
2180                                         push @list, { path => $path };
2181                                         $File::Find::prune = 1;
2182                                 }
2183                         },
2184                 }, "$dir");
2185
2186         } elsif (-f $projects_list) {
2187                 # read from file(url-encoded):
2188                 # 'git%2Fgit.git Linus+Torvalds'
2189                 # 'libs%2Fklibc%2Fklibc.git H.+Peter+Anvin'
2190                 # 'linux%2Fhotplug%2Fudev.git Greg+Kroah-Hartman'
2191                 my %paths;
2192                 open my ($fd), $projects_list or return;
2193         PROJECT:
2194                 while (my $line = <$fd>) {
2195                         chomp $line;
2196                         my ($path, $owner) = split ' ', $line;
2197                         $path = unescape($path);
2198                         $owner = unescape($owner);
2199                         if (!defined $path) {
2200                                 next;
2201                         }
2202                         if ($filter ne '') {
2203                                 # looking for forks;
2204                                 my $pfx = substr($path, 0, length($filter));
2205                                 if ($pfx ne $filter) {
2206                                         next PROJECT;
2207                                 }
2208                                 my $sfx = substr($path, length($filter));
2209                                 if ($sfx !~ /^\/.*\.git$/) {
2210                                         next PROJECT;
2211                                 }
2212                         } elsif ($check_forks) {
2213                         PATH:
2214                                 foreach my $filter (keys %paths) {
2215                                         # looking for forks;
2216                                         my $pfx = substr($path, 0, length($filter));
2217                                         if ($pfx ne $filter) {
2218                                                 next PATH;
2219                                         }
2220                                         my $sfx = substr($path, length($filter));
2221                                         if ($sfx !~ /^\/.*\.git$/) {
2222                                                 next PATH;
2223                                         }
2224                                         # is a fork, don't include it in
2225                                         # the list
2226                                         next PROJECT;
2227                                 }
2228                         }
2229                         if (check_export_ok("$projectroot/$path")) {
2230                                 my $pr = {
2231                                         path => $path,
2232                                         owner => to_utf8($owner),
2233                                 };
2234                                 push @list, $pr;
2235                                 (my $forks_path = $path) =~ s/\.git$//;
2236                                 $paths{$forks_path}++;
2237                         }
2238                 }
2239                 close $fd;
2240         }
2241         return @list;
2242 }
2243
2244 our $gitweb_project_owner = undef;
2245 sub git_get_project_list_from_file {
2246
2247         return if (defined $gitweb_project_owner);
2248
2249         $gitweb_project_owner = {};
2250         # read from file (url-encoded):
2251         # 'git%2Fgit.git Linus+Torvalds'
2252         # 'libs%2Fklibc%2Fklibc.git H.+Peter+Anvin'
2253         # 'linux%2Fhotplug%2Fudev.git Greg+Kroah-Hartman'
2254         if (-f $projects_list) {
2255                 open (my $fd , $projects_list);
2256                 while (my $line = <$fd>) {
2257                         chomp $line;
2258                         my ($pr, $ow) = split ' ', $line;
2259                         $pr = unescape($pr);
2260                         $ow = unescape($ow);
2261                         $gitweb_project_owner->{$pr} = to_utf8($ow);
2262                 }
2263                 close $fd;
2264         }
2265 }
2266
2267 sub git_get_project_owner {
2268         my $project = shift;
2269         my $owner;
2270
2271         return undef unless $project;
2272         $git_dir = "$projectroot/$project";
2273
2274         if (!defined $gitweb_project_owner) {
2275                 git_get_project_list_from_file();
2276         }
2277
2278         if (exists $gitweb_project_owner->{$project}) {
2279                 $owner = $gitweb_project_owner->{$project};
2280         }
2281         if (!defined $owner){
2282                 $owner = git_get_project_config('owner');
2283         }
2284         if (!defined $owner) {
2285                 $owner = get_file_owner("$git_dir");
2286         }
2287
2288         return $owner;
2289 }
2290
2291 sub git_get_last_activity {
2292         my ($path) = @_;
2293         my $fd;
2294
2295         $git_dir = "$projectroot/$path";
2296         open($fd, "-|", git_cmd(), 'for-each-ref',
2297              '--format=%(committer)',
2298              '--sort=-committerdate',
2299              '--count=1',
2300              'refs/heads') or return;
2301         my $most_recent = <$fd>;
2302         close $fd or return;
2303         if (defined $most_recent &&
2304             $most_recent =~ / (\d+) [-+][01]\d\d\d$/) {
2305                 my $timestamp = $1;
2306                 my $age = time - $timestamp;
2307                 return ($age, age_string($age));
2308         }
2309         return (undef, undef);
2310 }
2311
2312 sub git_get_references {
2313         my $type = shift || "";
2314         my %refs;
2315         # 5dc01c595e6c6ec9ccda4f6f69c131c0dd945f8c refs/tags/v2.6.11
2316         # c39ae07f393806ccf406ef966e9a15afc43cc36a refs/tags/v2.6.11^{}
2317         open my $fd, "-|", git_cmd(), "show-ref", "--dereference",
2318                 ($type ? ("--", "refs/$type") : ()) # use -- <pattern> if $type
2319                 or return;
2320
2321         while (my $line = <$fd>) {
2322                 chomp $line;
2323                 if ($line =~ m!^([0-9a-fA-F]{40})\srefs/($type.*)$!) {
2324                         if (defined $refs{$1}) {
2325                                 push @{$refs{$1}}, $2;
2326                         } else {
2327                                 $refs{$1} = [ $2 ];
2328                         }
2329                 }
2330         }
2331         close $fd or return;
2332         return \%refs;
2333 }
2334
2335 sub git_get_rev_name_tags {
2336         my $hash = shift || return undef;
2337
2338         open my $fd, "-|", git_cmd(), "name-rev", "--tags", $hash
2339                 or return;
2340         my $name_rev = <$fd>;
2341         close $fd;
2342
2343         if ($name_rev =~ m|^$hash tags/(.*)$|) {
2344                 return $1;
2345         } else {
2346                 # catches also '$hash undefined' output
2347                 return undef;
2348         }
2349 }
2350
2351 ## ----------------------------------------------------------------------
2352 ## parse to hash functions
2353
2354 sub parse_date {
2355         my $epoch = shift;
2356         my $tz = shift || "-0000";
2357
2358         my %date;
2359         my @months = ("Jan", "Feb", "Mar", "Apr", "May", "Jun", "Jul", "Aug", "Sep", "Oct", "Nov", "Dec");
2360         my @days = ("Sun", "Mon", "Tue", "Wed", "Thu", "Fri", "Sat");
2361         my ($sec, $min, $hour, $mday, $mon, $year, $wday, $yday) = gmtime($epoch);
2362         $date{'hour'} = $hour;
2363         $date{'minute'} = $min;
2364         $date{'mday'} = $mday;
2365         $date{'day'} = $days[$wday];
2366         $date{'month'} = $months[$mon];
2367         $date{'rfc2822'}   = sprintf "%s, %d %s %4d %02d:%02d:%02d +0000",
2368                              $days[$wday], $mday, $months[$mon], 1900+$year, $hour ,$min, $sec;
2369         $date{'mday-time'} = sprintf "%d %s %02d:%02d",
2370                              $mday, $months[$mon], $hour ,$min;
2371         $date{'iso-8601'}  = sprintf "%04d-%02d-%02dT%02d:%02d:%02dZ",
2372                              1900+$year, 1+$mon, $mday, $hour ,$min, $sec;
2373
2374         $tz =~ m/^([+\-][0-9][0-9])([0-9][0-9])$/;
2375         my $local = $epoch + ((int $1 + ($2/60)) * 3600);
2376         ($sec, $min, $hour, $mday, $mon, $year, $wday, $yday) = gmtime($local);
2377         $date{'hour_local'} = $hour;
2378         $date{'minute_local'} = $min;
2379         $date{'tz_local'} = $tz;
2380         $date{'iso-tz'} = sprintf("%04d-%02d-%02d %02d:%02d:%02d %s",
2381                                   1900+$year, $mon+1, $mday,
2382                                   $hour, $min, $sec, $tz);
2383         return %date;
2384 }
2385
2386 sub parse_tag {
2387         my $tag_id = shift;
2388         my %tag;
2389         my @comment;
2390
2391         open my $fd, "-|", git_cmd(), "cat-file", "tag", $tag_id or return;
2392         $tag{'id'} = $tag_id;
2393         while (my $line = <$fd>) {
2394                 chomp $line;
2395                 if ($line =~ m/^object ([0-9a-fA-F]{40})$/) {
2396                         $tag{'object'} = $1;
2397                 } elsif ($line =~ m/^type (.+)$/) {
2398                         $tag{'type'} = $1;
2399                 } elsif ($line =~ m/^tag (.+)$/) {
2400                         $tag{'name'} = $1;
2401                 } elsif ($line =~ m/^tagger (.*) ([0-9]+) (.*)$/) {
2402                         $tag{'author'} = $1;
2403                         $tag{'epoch'} = $2;
2404                         $tag{'tz'} = $3;
2405                 } elsif ($line =~ m/--BEGIN/) {
2406                         push @comment, $line;
2407                         last;
2408                 } elsif ($line eq "") {
2409                         last;
2410                 }
2411         }
2412         push @comment, <$fd>;
2413         $tag{'comment'} = \@comment;
2414         close $fd or return;
2415         if (!defined $tag{'name'}) {
2416                 return
2417         };
2418         return %tag
2419 }
2420
2421 sub parse_commit_text {
2422         my ($commit_text, $withparents) = @_;
2423         my @commit_lines = split '\n', $commit_text;
2424         my %co;
2425
2426         pop @commit_lines; # Remove '\0'
2427
2428         if (! @commit_lines) {
2429                 return;
2430         }
2431
2432         my $header = shift @commit_lines;
2433         if ($header !~ m/^[0-9a-fA-F]{40}/) {
2434                 return;
2435         }
2436         ($co{'id'}, my @parents) = split ' ', $header;
2437         while (my $line = shift @commit_lines) {
2438                 last if $line eq "\n";
2439                 if ($line =~ m/^tree ([0-9a-fA-F]{40})$/) {
2440                         $co{'tree'} = $1;
2441                 } elsif ((!defined $withparents) && ($line =~ m/^parent ([0-9a-fA-F]{40})$/)) {
2442                         push @parents, $1;
2443                 } elsif ($line =~ m/^author (.*) ([0-9]+) (.*)$/) {
2444                         $co{'author'} = $1;
2445                         $co{'author_epoch'} = $2;
2446                         $co{'author_tz'} = $3;
2447                         if ($co{'author'} =~ m/^([^<]+) <([^>]*)>/) {
2448                                 $co{'author_name'}  = $1;
2449                                 $co{'author_email'} = $2;
2450                         } else {
2451                                 $co{'author_name'} = $co{'author'};
2452                         }
2453                 } elsif ($line =~ m/^committer (.*) ([0-9]+) (.*)$/) {
2454                         $co{'committer'} = $1;
2455                         $co{'committer_epoch'} = $2;
2456                         $co{'committer_tz'} = $3;
2457                         $co{'committer_name'} = $co{'committer'};
2458                         if ($co{'committer'} =~ m/^([^<]+) <([^>]*)>/) {
2459                                 $co{'committer_name'}  = $1;
2460                                 $co{'committer_email'} = $2;
2461                         } else {
2462                                 $co{'committer_name'} = $co{'committer'};
2463                         }
2464                 }
2465         }
2466         if (!defined $co{'tree'}) {
2467                 return;
2468         };
2469         $co{'parents'} = \@parents;
2470         $co{'parent'} = $parents[0];
2471
2472         foreach my $title (@commit_lines) {
2473                 $title =~ s/^    //;
2474                 if ($title ne "") {
2475                         $co{'title'} = chop_str($title, 80, 5);
2476                         # remove leading stuff of merges to make the interesting part visible
2477                         if (length($title) > 50) {
2478                                 $title =~ s/^Automatic //;
2479                                 $title =~ s/^merge (of|with) /Merge ... /i;
2480                                 if (length($title) > 50) {
2481                                         $title =~ s/(http|rsync):\/\///;
2482                                 }
2483                                 if (length($title) > 50) {
2484                                         $title =~ s/(master|www|rsync)\.//;
2485                                 }
2486                                 if (length($title) > 50) {
2487                                         $title =~ s/kernel.org:?//;
2488                                 }
2489                                 if (length($title) > 50) {
2490                                         $title =~ s/\/pub\/scm//;
2491                                 }
2492                         }
2493                         $co{'title_short'} = chop_str($title, 50, 5);
2494                         last;
2495                 }
2496         }
2497         if (! defined $co{'title'} || $co{'title'} eq "") {
2498                 $co{'title'} = $co{'title_short'} = '(no commit message)';
2499         }
2500         # remove added spaces
2501         foreach my $line (@commit_lines) {
2502                 $line =~ s/^    //;
2503         }
2504         $co{'comment'} = \@commit_lines;
2505
2506         my $age = time - $co{'committer_epoch'};
2507         $co{'age'} = $age;
2508         $co{'age_string'} = age_string($age);
2509         my ($sec, $min, $hour, $mday, $mon, $year, $wday, $yday) = gmtime($co{'committer_epoch'});
2510         if ($age > 60*60*24*7*2) {
2511                 $co{'age_string_date'} = sprintf "%4i-%02u-%02i", 1900 + $year, $mon+1, $mday;
2512                 $co{'age_string_age'} = $co{'age_string'};
2513         } else {
2514                 $co{'age_string_date'} = $co{'age_string'};
2515                 $co{'age_string_age'} = sprintf "%4i-%02u-%02i", 1900 + $year, $mon+1, $mday;
2516         }
2517         return %co;
2518 }
2519
2520 sub parse_commit {
2521         my ($commit_id) = @_;
2522         my %co;
2523
2524         local $/ = "\0";
2525
2526         open my $fd, "-|", git_cmd(), "rev-list",
2527                 "--parents",
2528                 "--header",
2529                 "--max-count=1",
2530                 $commit_id,
2531                 "--",
2532                 or die_error(500, "Open git-rev-list failed");
2533         %co = parse_commit_text(<$fd>, 1);
2534         close $fd;
2535
2536         return %co;
2537 }
2538
2539 sub parse_commits {
2540         my ($commit_id, $maxcount, $skip, $filename, @args) = @_;
2541         my @cos;
2542
2543         $maxcount ||= 1;
2544         $skip ||= 0;
2545
2546         local $/ = "\0";
2547
2548         open my $fd, "-|", git_cmd(), "rev-list",
2549                 "--header",
2550                 @args,
2551                 ("--max-count=" . $maxcount),
2552                 ("--skip=" . $skip),
2553                 @extra_options,
2554                 $commit_id,
2555                 "--",
2556                 ($filename ? ($filename) : ())
2557                 or die_error(500, "Open git-rev-list failed");
2558         while (my $line = <$fd>) {
2559                 my %co = parse_commit_text($line);
2560                 push @cos, \%co;
2561         }
2562         close $fd;
2563
2564         return wantarray ? @cos : \@cos;
2565 }
2566
2567 # parse line of git-diff-tree "raw" output
2568 sub parse_difftree_raw_line {
2569         my $line = shift;
2570         my %res;
2571
2572         # ':100644 100644 03b218260e99b78c6df0ed378e59ed9205ccc96d 3b93d5e7cc7f7dd4ebed13a5cc1a4ad976fc94d8 M   ls-files.c'
2573         # ':100644 100644 7f9281985086971d3877aca27704f2aaf9c448ce bc190ebc71bbd923f2b728e505408f5e54bd073a M   rev-tree.c'
2574         if ($line =~ m/^:([0-7]{6}) ([0-7]{6}) ([0-9a-fA-F]{40}) ([0-9a-fA-F]{40}) (.)([0-9]{0,3})\t(.*)$/) {
2575                 $res{'from_mode'} = $1;
2576                 $res{'to_mode'} = $2;
2577                 $res{'from_id'} = $3;
2578                 $res{'to_id'} = $4;
2579                 $res{'status'} = $5;
2580                 $res{'similarity'} = $6;
2581                 if ($res{'status'} eq 'R' || $res{'status'} eq 'C') { # renamed or copied
2582                         ($res{'from_file'}, $res{'to_file'}) = map { unquote($_) } split("\t", $7);
2583                 } else {
2584                         $res{'from_file'} = $res{'to_file'} = $res{'file'} = unquote($7);
2585                 }
2586         }
2587         # '::100755 100755 100755 60e79ca1b01bc8b057abe17ddab484699a7f5fdb 94067cc5f73388f33722d52ae02f44692bc07490 94067cc5f73388f33722d52ae02f44692bc07490 MR git-gui/git-gui.sh'
2588         # combined diff (for merge commit)
2589         elsif ($line =~ s/^(::+)((?:[0-7]{6} )+)((?:[0-9a-fA-F]{40} )+)([a-zA-Z]+)\t(.*)$//) {
2590                 $res{'nparents'}  = length($1);
2591                 $res{'from_mode'} = [ split(' ', $2) ];
2592                 $res{'to_mode'} = pop @{$res{'from_mode'}};
2593                 $res{'from_id'} = [ split(' ', $3) ];
2594                 $res{'to_id'} = pop @{$res{'from_id'}};
2595                 $res{'status'} = [ split('', $4) ];
2596                 $res{'to_file'} = unquote($5);
2597         }
2598         # 'c512b523472485aef4fff9e57b229d9d243c967f'
2599         elsif ($line =~ m/^([0-9a-fA-F]{40})$/) {
2600                 $res{'commit'} = $1;
2601         }
2602
2603         return wantarray ? %res : \%res;
2604 }
2605
2606 # wrapper: return parsed line of git-diff-tree "raw" output
2607 # (the argument might be raw line, or parsed info)
2608 sub parsed_difftree_line {
2609         my $line_or_ref = shift;
2610
2611         if (ref($line_or_ref) eq "HASH") {
2612                 # pre-parsed (or generated by hand)
2613                 return $line_or_ref;
2614         } else {
2615                 return parse_difftree_raw_line($line_or_ref);
2616         }
2617 }
2618
2619 # parse line of git-ls-tree output
2620 sub parse_ls_tree_line ($;%) {
2621         my $line = shift;
2622         my %opts = @_;
2623         my %res;
2624
2625         #'100644 blob 0fa3f3a66fb6a137f6ec2c19351ed4d807070ffa  panic.c'
2626         $line =~ m/^([0-9]+) (.+) ([0-9a-fA-F]{40})\t(.+)$/s;
2627
2628         $res{'mode'} = $1;
2629         $res{'type'} = $2;
2630         $res{'hash'} = $3;
2631         if ($opts{'-z'}) {
2632                 $res{'name'} = $4;
2633         } else {
2634                 $res{'name'} = unquote($4);
2635         }
2636
2637         return wantarray ? %res : \%res;
2638 }
2639
2640 # generates _two_ hashes, references to which are passed as 2 and 3 argument
2641 sub parse_from_to_diffinfo {
2642         my ($diffinfo, $from, $to, @parents) = @_;
2643
2644         if ($diffinfo->{'nparents'}) {
2645                 # combined diff
2646                 $from->{'file'} = [];
2647                 $from->{'href'} = [];
2648                 fill_from_file_info($diffinfo, @parents)
2649                         unless exists $diffinfo->{'from_file'};
2650                 for (my $i = 0; $i < $diffinfo->{'nparents'}; $i++) {
2651                         $from->{'file'}[$i] =
2652                                 defined $diffinfo->{'from_file'}[$i] ?
2653                                         $diffinfo->{'from_file'}[$i] :
2654                                         $diffinfo->{'to_file'};
2655                         if ($diffinfo->{'status'}[$i] ne "A") { # not new (added) file
2656                                 $from->{'href'}[$i] = href(action=>"blob",
2657                                                            hash_base=>$parents[$i],
2658                                                            hash=>$diffinfo->{'from_id'}[$i],
2659                                                            file_name=>$from->{'file'}[$i]);
2660                         } else {
2661                                 $from->{'href'}[$i] = undef;
2662                         }
2663                 }
2664         } else {
2665                 # ordinary (not combined) diff
2666                 $from->{'file'} = $diffinfo->{'from_file'};
2667                 if ($diffinfo->{'status'} ne "A") { # not new (added) file
2668                         $from->{'href'} = href(action=>"blob", hash_base=>$hash_parent,
2669                                                hash=>$diffinfo->{'from_id'},
2670                                                file_name=>$from->{'file'});
2671                 } else {
2672                         delete $from->{'href'};
2673                 }
2674         }
2675
2676         $to->{'file'} = $diffinfo->{'to_file'};
2677         if (!is_deleted($diffinfo)) { # file exists in result
2678                 $to->{'href'} = href(action=>"blob", hash_base=>$hash,
2679                                      hash=>$diffinfo->{'to_id'},
2680                                      file_name=>$to->{'file'});
2681         } else {
2682                 delete $to->{'href'};
2683         }
2684 }
2685
2686 ## ......................................................................
2687 ## parse to array of hashes functions
2688
2689 sub git_get_heads_list {
2690         my $limit = shift;
2691         my @headslist;
2692
2693         open my $fd, '-|', git_cmd(), 'for-each-ref',
2694                 ($limit ? '--count='.($limit+1) : ()), '--sort=-committerdate',
2695                 '--format=%(objectname) %(refname) %(subject)%00%(committer)',
2696                 'refs/heads'
2697                 or return;
2698         while (my $line = <$fd>) {
2699                 my %ref_item;
2700
2701                 chomp $line;
2702                 my ($refinfo, $committerinfo) = split(/\0/, $line);
2703                 my ($hash, $name, $title) = split(' ', $refinfo, 3);
2704                 my ($committer, $epoch, $tz) =
2705                         ($committerinfo =~ /^(.*) ([0-9]+) (.*)$/);
2706                 $ref_item{'fullname'}  = $name;
2707                 $name =~ s!^refs/heads/!!;
2708
2709                 $ref_item{'name'}  = $name;
2710                 $ref_item{'id'}    = $hash;
2711                 $ref_item{'title'} = $title || '(no commit message)';
2712                 $ref_item{'epoch'} = $epoch;
2713                 if ($epoch) {
2714                         $ref_item{'age'} = age_string(time - $ref_item{'epoch'});
2715                 } else {
2716                         $ref_item{'age'} = "unknown";
2717                 }
2718
2719                 push @headslist, \%ref_item;
2720         }
2721         close $fd;
2722
2723         return wantarray ? @headslist : \@headslist;
2724 }
2725
2726 sub git_get_tags_list {
2727         my $limit = shift;
2728         my @tagslist;
2729
2730         open my $fd, '-|', git_cmd(), 'for-each-ref',
2731                 ($limit ? '--count='.($limit+1) : ()), '--sort=-creatordate',
2732                 '--format=%(objectname) %(objecttype) %(refname) '.
2733                 '%(*objectname) %(*objecttype) %(subject)%00%(creator)',
2734                 'refs/tags'
2735                 or return;
2736         while (my $line = <$fd>) {
2737                 my %ref_item;
2738
2739                 chomp $line;
2740                 my ($refinfo, $creatorinfo) = split(/\0/, $line);
2741                 my ($id, $type, $name, $refid, $reftype, $title) = split(' ', $refinfo, 6);
2742                 my ($creator, $epoch, $tz) =
2743                         ($creatorinfo =~ /^(.*) ([0-9]+) (.*)$/);
2744                 $ref_item{'fullname'} = $name;
2745                 $name =~ s!^refs/tags/!!;
2746
2747                 $ref_item{'type'} = $type;
2748                 $ref_item{'id'} = $id;
2749                 $ref_item{'name'} = $name;
2750                 if ($type eq "tag") {
2751                         $ref_item{'subject'} = $title;
2752                         $ref_item{'reftype'} = $reftype;
2753                         $ref_item{'refid'}   = $refid;
2754                 } else {
2755                         $ref_item{'reftype'} = $type;
2756                         $ref_item{'refid'}   = $id;
2757                 }
2758
2759                 if ($type eq "tag" || $type eq "commit") {
2760                         $ref_item{'epoch'} = $epoch;
2761                         if ($epoch) {
2762                                 $ref_item{'age'} = age_string(time - $ref_item{'epoch'});
2763                         } else {
2764                                 $ref_item{'age'} = "unknown";
2765                         }
2766                 }
2767
2768                 push @tagslist, \%ref_item;
2769         }
2770         close $fd;
2771
2772         return wantarray ? @tagslist : \@tagslist;
2773 }
2774
2775 ## ----------------------------------------------------------------------
2776 ## filesystem-related functions
2777
2778 sub get_file_owner {
2779         my $path = shift;
2780
2781         my ($dev, $ino, $mode, $nlink, $st_uid, $st_gid, $rdev, $size) = stat($path);
2782         my ($name, $passwd, $uid, $gid, $quota, $comment, $gcos, $dir, $shell) = getpwuid($st_uid);
2783         if (!defined $gcos) {
2784                 return undef;
2785         }
2786         my $owner = $gcos;
2787         $owner =~ s/[,;].*$//;
2788         return to_utf8($owner);
2789 }
2790
2791 # assume that file exists
2792 sub insert_file {
2793         my $filename = shift;
2794
2795         open my $fd, '<', $filename;
2796         print map { to_utf8($_) } <$fd>;
2797         close $fd;
2798 }
2799
2800 ## ......................................................................
2801 ## mimetype related functions
2802
2803 sub mimetype_guess_file {
2804         my $filename = shift;
2805         my $mimemap = shift;
2806         -r $mimemap or return undef;
2807
2808         my %mimemap;
2809         open(MIME, $mimemap) or return undef;
2810         while (<MIME>) {
2811                 next if m/^#/; # skip comments
2812                 my ($mime, $exts) = split(/\t+/);
2813                 if (defined $exts) {
2814                         my @exts = split(/\s+/, $exts);
2815                         foreach my $ext (@exts) {
2816                                 $mimemap{$ext} = $mime;
2817                         }
2818                 }
2819         }
2820         close(MIME);
2821
2822         $filename =~ /\.([^.]*)$/;
2823         return $mimemap{$1};
2824 }
2825
2826 sub mimetype_guess {
2827         my $filename = shift;
2828         my $mime;
2829         $filename =~ /\./ or return undef;
2830
2831         if ($mimetypes_file) {
2832                 my $file = $mimetypes_file;
2833                 if ($file !~ m!^/!) { # if it is relative path
2834                         # it is relative to project
2835                         $file = "$projectroot/$project/$file";
2836                 }
2837                 $mime = mimetype_guess_file($filename, $file);
2838         }
2839         $mime ||= mimetype_guess_file($filename, '/etc/mime.types');
2840         return $mime;
2841 }
2842
2843 sub blob_mimetype {
2844         my $fd = shift;
2845         my $filename = shift;
2846
2847         if ($filename) {
2848                 my $mime = mimetype_guess($filename);
2849                 $mime and return $mime;
2850         }
2851
2852         # just in case
2853         return $default_blob_plain_mimetype unless $fd;
2854
2855         if (-T $fd) {
2856                 return 'text/plain';
2857         } elsif (! $filename) {
2858                 return 'application/octet-stream';
2859         } elsif ($filename =~ m/\.png$/i) {
2860                 return 'image/png';
2861         } elsif ($filename =~ m/\.gif$/i) {
2862                 return 'image/gif';
2863         } elsif ($filename =~ m/\.jpe?g$/i) {
2864                 return 'image/jpeg';
2865         } else {
2866                 return 'application/octet-stream';
2867         }
2868 }
2869
2870 sub blob_contenttype {
2871         my ($fd, $file_name, $type) = @_;
2872
2873         $type ||= blob_mimetype($fd, $file_name);
2874         if ($type eq 'text/plain' && defined $default_text_plain_charset) {
2875                 $type .= "; charset=$default_text_plain_charset";
2876         }
2877
2878         return $type;
2879 }
2880
2881 ## ======================================================================
2882 ## functions printing HTML: header, footer, error page
2883
2884 sub git_header_html {
2885         my $status = shift || "200 OK";
2886         my $expires = shift;
2887
2888         my $title = "$site_name";
2889         if (defined $project) {
2890                 $title .= " - " . to_utf8($project);
2891                 if (defined $action) {
2892                         $title .= "/$action";
2893                         if (defined $file_name) {
2894                                 $title .= " - " . esc_path($file_name);
2895                                 if ($action eq "tree" && $file_name !~ m|/$|) {
2896                                         $title .= "/";
2897                                 }
2898                         }
2899                 }
2900         }
2901         my $content_type;
2902         # require explicit support from the UA if we are to send the page as
2903         # 'application/xhtml+xml', otherwise send it as plain old 'text/html'.
2904         # we have to do this because MSIE sometimes globs '*/*', pretending to
2905         # support xhtml+xml but choking when it gets what it asked for.
2906         if (defined $cgi->http('HTTP_ACCEPT') &&
2907             $cgi->http('HTTP_ACCEPT') =~ m/(,|;|\s|^)application\/xhtml\+xml(,|;|\s|$)/ &&
2908             $cgi->Accept('application/xhtml+xml') != 0) {
2909                 $content_type = 'application/xhtml+xml';
2910         } else {
2911                 $content_type = 'text/html';
2912         }
2913         print $cgi->header(-type=>$content_type, -charset => 'utf-8',
2914                            -status=> $status, -expires => $expires);
2915         my $mod_perl_version = $ENV{'MOD_PERL'} ? " $ENV{'MOD_PERL'}" : '';
2916         print <<EOF;
2917 <?xml version="1.0" encoding="utf-8"?>
2918 <!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Strict//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-strict.dtd">
2919 <html xmlns="http://www.w3.org/1999/xhtml" xml:lang="en-US" lang="en-US">
2920 <!-- git web interface version $version, (C) 2005-2006, Kay Sievers <kay.sievers\@vrfy.org>, Christian Gierke -->
2921 <!-- git core binaries version $git_version -->
2922 <head>
2923 <meta http-equiv="content-type" content="$content_type; charset=utf-8"/>
2924 <meta name="generator" content="gitweb/$version git/$git_version$mod_perl_version"/>
2925 <meta name="robots" content="index, nofollow"/>
2926 <title>$title</title>
2927 EOF
2928         # the stylesheet, favicon etc urls won't work correctly with path_info
2929         # unless we set the appropriate base URL
2930         if ($ENV{'PATH_INFO'}) {
2931                 print "<base href=\"".esc_url($base_url)."\" />\n";
2932         }
2933         # print out each stylesheet that exist, providing backwards capability
2934         # for those people who defined $stylesheet in a config file
2935         if (defined $stylesheet) {
2936                 print '<link rel="stylesheet" type="text/css" href="'.$stylesheet.'"/>'."\n";
2937         } else {
2938                 foreach my $stylesheet (@stylesheets) {
2939                         next unless $stylesheet;
2940                         print '<link rel="stylesheet" type="text/css" href="'.$stylesheet.'"/>'."\n";
2941                 }
2942         }
2943         if (defined $project) {
2944                 my %href_params = get_feed_info();
2945                 if (!exists $href_params{'-title'}) {
2946                         $href_params{'-title'} = 'log';
2947                 }
2948
2949                 foreach my $format qw(RSS Atom) {
2950                         my $type = lc($format);
2951                         my %link_attr = (
2952                                 '-rel' => 'alternate',
2953                                 '-title' => "$project - $href_params{'-title'} - $format feed",
2954                                 '-type' => "application/$type+xml"
2955                         );
2956
2957                         $href_params{'action'} = $type;
2958                         $link_attr{'-href'} = href(%href_params);
2959                         print "<link ".
2960                               "rel=\"$link_attr{'-rel'}\" ".
2961                               "title=\"$link_attr{'-title'}\" ".
2962                               "href=\"$link_attr{'-href'}\" ".
2963                               "type=\"$link_attr{'-type'}\" ".
2964                               "/>\n";
2965
2966                         $href_params{'extra_options'} = '--no-merges';
2967                         $link_attr{'-href'} = href(%href_params);
2968                         $link_attr{'-title'} .= ' (no merges)';
2969                         print "<link ".
2970                               "rel=\"$link_attr{'-rel'}\" ".
2971                               "title=\"$link_attr{'-title'}\" ".
2972                               "href=\"$link_attr{'-href'}\" ".
2973                               "type=\"$link_attr{'-type'}\" ".
2974                               "/>\n";
2975                 }
2976
2977         } else {
2978                 printf('<link rel="alternate" title="%s projects list" '.
2979                        'href="%s" type="text/plain; charset=utf-8" />'."\n",
2980                        $site_name, href(project=>undef, action=>"project_index"));
2981                 printf('<link rel="alternate" title="%s projects feeds" '.
2982                        'href="%s" type="text/x-opml" />'."\n",
2983                        $site_name, href(project=>undef, action=>"opml"));
2984         }
2985         if (defined $favicon) {
2986                 print qq(<link rel="shortcut icon" href="$favicon" type="image/png" />\n);
2987         }
2988
2989         print "</head>\n" .
2990               "<body>\n";
2991
2992         if (-f $site_header) {
2993                 insert_file($site_header);
2994         }
2995
2996         print "<div class=\"page_header\">\n" .
2997               $cgi->a({-href => esc_url($logo_url),
2998                        -title => $logo_label},
2999                       qq(<img src="$logo" width="72" height="27" alt="git" class="logo"/>));
3000         print $cgi->a({-href => esc_url($home_link)}, $home_link_str) . " / ";
3001         if (defined $project) {
3002                 print $cgi->a({-href => href(action=>"summary")}, esc_html($project));
3003                 if (defined $action) {
3004                         print " / $action";
3005                 }
3006                 print "\n";
3007         }
3008         print "</div>\n";
3009
3010         my $have_search = gitweb_check_feature('search');
3011         if (defined $project && $have_search) {
3012                 if (!defined $searchtext) {
3013                         $searchtext = "";
3014                 }
3015                 my $search_hash;
3016                 if (defined $hash_base) {
3017                         $search_hash = $hash_base;
3018                 } elsif (defined $hash) {
3019                         $search_hash = $hash;
3020                 } else {
3021                         $search_hash = "HEAD";
3022                 }
3023                 my $action = $my_uri;
3024                 my $use_pathinfo = gitweb_check_feature('pathinfo');
3025                 if ($use_pathinfo) {
3026                         $action .= "/".esc_url($project);
3027                 }
3028                 print $cgi->startform(-method => "get", -action => $action) .
3029                       "<div class=\"search\">\n" .
3030                       (!$use_pathinfo &&
3031                       $cgi->input({-name=>"p", -value=>$project, -type=>"hidden"}) . "\n") .
3032                       $cgi->input({-name=>"a", -value=>"search", -type=>"hidden"}) . "\n" .
3033                       $cgi->input({-name=>"h", -value=>$search_hash, -type=>"hidden"}) . "\n" .
3034                       $cgi->popup_menu(-name => 'st', -default => 'commit',
3035                                        -values => ['commit', 'grep', 'author', 'committer', 'pickaxe']) .
3036                       $cgi->sup($cgi->a({-href => href(action=>"search_help")}, "?")) .
3037                       " search:\n",
3038                       $cgi->textfield(-name => "s", -value => $searchtext) . "\n" .
3039                       "<span title=\"Extended regular expression\">" .
3040                       $cgi->checkbox(-name => 'sr', -value => 1, -label => 're',
3041                                      -checked => $search_use_regexp) .
3042                       "</span>" .
3043                       "</div>" .
3044                       $cgi->end_form() . "\n";
3045         }
3046 }
3047
3048 sub git_footer_html {
3049         my $feed_class = 'rss_logo';
3050
3051         print "<div class=\"page_footer\">\n";
3052         if (defined $project) {
3053                 my $descr = git_get_project_description($project);
3054                 if (defined $descr) {
3055                         print "<div class=\"page_footer_text\">" . esc_html($descr) . "</div>\n";
3056                 }
3057
3058                 my %href_params = get_feed_info();
3059                 if (!%href_params) {
3060                         $feed_class .= ' generic';
3061                 }
3062                 $href_params{'-title'} ||= 'log';
3063
3064                 foreach my $format qw(RSS Atom) {
3065                         $href_params{'action'} = lc($format);
3066                         print $cgi->a({-href => href(%href_params),
3067                                       -title => "$href_params{'-title'} $format feed",
3068                                       -class => $feed_class}, $format)."\n";
3069                 }
3070
3071         } else {
3072                 print $cgi->a({-href => href(project=>undef, action=>"opml"),
3073                               -class => $feed_class}, "OPML") . " ";
3074                 print $cgi->a({-href => href(project=>undef, action=>"project_index"),
3075                               -class => $feed_class}, "TXT") . "\n";
3076         }
3077         print "</div>\n"; # class="page_footer"
3078
3079         if (-f $site_footer) {
3080                 insert_file($site_footer);
3081         }
3082
3083         print "</body>\n" .
3084               "</html>";
3085 }
3086
3087 # die_error(<http_status_code>, <error_message>)
3088 # Example: die_error(404, 'Hash not found')
3089 # By convention, use the following status codes (as defined in RFC 2616):
3090 # 400: Invalid or missing CGI parameters, or
3091 #      requested object exists but has wrong type.
3092 # 403: Requested feature (like "pickaxe" or "snapshot") not enabled on
3093 #      this server or project.
3094 # 404: Requested object/revision/project doesn't exist.
3095 # 500: The server isn't configured properly, or
3096 #      an internal error occurred (e.g. failed assertions caused by bugs), or
3097 #      an unknown error occurred (e.g. the git binary died unexpectedly).
3098 sub die_error {
3099         my $status = shift || 500;
3100         my $error = shift || "Internal server error";
3101
3102         my %http_responses = (400 => '400 Bad Request',
3103                               403 => '403 Forbidden',
3104                               404 => '404 Not Found',
3105                               500 => '500 Internal Server Error');
3106         git_header_html($http_responses{$status});
3107         print <<EOF;
3108 <div class="page_body">
3109 <br /><br />
3110 $status - $error
3111 <br />
3112 </div>
3113 EOF
3114         git_footer_html();
3115         exit;
3116 }
3117
3118 ## ----------------------------------------------------------------------
3119 ## functions printing or outputting HTML: navigation
3120
3121 sub git_print_page_nav {
3122         my ($current, $suppress, $head, $treehead, $treebase, $extra) = @_;
3123         $extra = '' if !defined $extra; # pager or formats
3124
3125         my @navs = qw(summary shortlog log commit commitdiff tree);
3126         if ($suppress) {
3127                 @navs = grep { $_ ne $suppress } @navs;
3128         }
3129
3130         my %arg = map { $_ => {action=>$_} } @navs;
3131         if (defined $head) {
3132                 for (qw(commit commitdiff)) {
3133                         $arg{$_}{'hash'} = $head;
3134                 }
3135                 if ($current =~ m/^(tree | log | shortlog | commit | commitdiff | search)$/x) {
3136                         for (qw(shortlog log)) {
3137                                 $arg{$_}{'hash'} = $head;
3138                         }
3139                 }
3140         }
3141
3142         $arg{'tree'}{'hash'} = $treehead if defined $treehead;
3143         $arg{'tree'}{'hash_base'} = $treebase if defined $treebase;
3144
3145         my @actions = gitweb_get_feature('actions');
3146         my %repl = (
3147                 '%' => '%',
3148                 'n' => $project,         # project name
3149                 'f' => $git_dir,         # project path within filesystem
3150                 'h' => $treehead || '',  # current hash ('h' parameter)
3151                 'b' => $treebase || '',  # hash base ('hb' parameter)
3152         );
3153         while (@actions) {
3154                 my ($label, $link, $pos) = splice(@actions,0,3);
3155                 # insert
3156                 @navs = map { $_ eq $pos ? ($_, $label) : $_ } @navs;
3157                 # munch munch
3158                 $link =~ s/%([%nfhb])/$repl{$1}/g;
3159                 $arg{$label}{'_href'} = $link;
3160         }
3161
3162         print "<div class=\"page_nav\">\n" .
3163                 (join " | ",
3164                  map { $_ eq $current ?
3165                        $_ : $cgi->a({-href => ($arg{$_}{_href} ? $arg{$_}{_href} : href(%{$arg{$_}}))}, "$_")
3166                  } @navs);
3167         print "<br/>\n$extra<br/>\n" .
3168               "</div>\n";
3169 }
3170
3171 sub format_paging_nav {
3172         my ($action, $hash, $head, $page, $has_next_link) = @_;
3173         my $paging_nav;
3174
3175
3176         if ($hash ne $head || $page) {
3177                 $paging_nav .= $cgi->a({-href => href(action=>$action)}, "HEAD");
3178         } else {
3179                 $paging_nav .= "HEAD";
3180         }
3181
3182         if ($page > 0) {
3183                 $paging_nav .= " &sdot; " .
3184                         $cgi->a({-href => href(-replay=>1, page=>$page-1),
3185                                  -accesskey => "p", -title => "Alt-p"}, "prev");
3186         } else {
3187                 $paging_nav .= " &sdot; prev";
3188         }
3189
3190         if ($has_next_link) {
3191                 $paging_nav .= " &sdot; " .
3192                         $cgi->a({-href => href(-replay=>1, page=>$page+1),
3193                                  -accesskey => "n", -title => "Alt-n"}, "next");
3194         } else {
3195                 $paging_nav .= " &sdot; next";
3196         }
3197
3198         return $paging_nav;
3199 }
3200
3201 ## ......................................................................
3202 ## functions printing or outputting HTML: div
3203
3204 sub git_print_header_div {
3205         my ($action, $title, $hash, $hash_base) = @_;
3206         my %args = ();
3207
3208         $args{'action'} = $action;
3209         $args{'hash'} = $hash if $hash;
3210         $args{'hash_base'} = $hash_base if $hash_base;
3211
3212         print "<div class=\"header\">\n" .
3213               $cgi->a({-href => href(%args), -class => "title"},
3214               $title ? $title : $action) .
3215               "\n</div>\n";
3216 }
3217
3218 #sub git_print_authorship (\%) {
3219 sub git_print_authorship {
3220         my $co = shift;
3221
3222         my %ad = parse_date($co->{'author_epoch'}, $co->{'author_tz'});
3223         print "<div class=\"author_date\">" .
3224               esc_html($co->{'author_name'}) .
3225               " [$ad{'rfc2822'}";
3226         if ($ad{'hour_local'} < 6) {
3227                 printf(" (<span class=\"atnight\">%02d:%02d</span> %s)",
3228                        $ad{'hour_local'}, $ad{'minute_local'}, $ad{'tz_local'});
3229         } else {
3230                 printf(" (%02d:%02d %s)",
3231                        $ad{'hour_local'}, $ad{'minute_local'}, $ad{'tz_local'});
3232         }
3233         print "]</div>\n";
3234 }
3235
3236 sub git_print_page_path {
3237         my $name = shift;
3238         my $type = shift;
3239         my $hb = shift;
3240
3241
3242         print "<div class=\"page_path\">";
3243         print $cgi->a({-href => href(action=>"tree", hash_base=>$hb),
3244                       -title => 'tree root'}, to_utf8("[$project]"));
3245         print " / ";
3246         if (defined $name) {
3247                 my @dirname = split '/', $name;
3248                 my $basename = pop @dirname;
3249                 my $fullname = '';
3250
3251                 foreach my $dir (@dirname) {
3252                         $fullname .= ($fullname ? '/' : '') . $dir;
3253                         print $cgi->a({-href => href(action=>"tree", file_name=>$fullname,
3254                                                      hash_base=>$hb),
3255                                       -title => $fullname}, esc_path($dir));
3256                         print " / ";
3257                 }
3258                 if (defined $type && $type eq 'blob') {
3259                         print $cgi->a({-href => href(action=>"blob_plain", file_name=>$file_name,
3260                                                      hash_base=>$hb),
3261                                       -title => $name}, esc_path($basename));
3262                 } elsif (defined $type && $type eq 'tree') {
3263                         print $cgi->a({-href => href(action=>"tree", file_name=>$file_name,
3264                                                      hash_base=>$hb),
3265                                       -title => $name}, esc_path($basename));
3266                         print " / ";
3267                 } else {
3268                         print esc_path($basename);
3269                 }
3270         }
3271         print "<br/></div>\n";
3272 }
3273
3274 # sub git_print_log (\@;%) {
3275 sub git_print_log ($;%) {
3276         my $log = shift;
3277         my %opts = @_;
3278
3279         if ($opts{'-remove_title'}) {
3280                 # remove title, i.e. first line of log
3281                 shift @$log;
3282         }
3283         # remove leading empty lines
3284         while (defined $log->[0] && $log->[0] eq "") {
3285                 shift @$log;
3286         }
3287
3288         # print log
3289         my $signoff = 0;
3290         my $empty = 0;
3291         foreach my $line (@$log) {
3292                 if ($line =~ m/^ *(signed[ \-]off[ \-]by[ :]|acked[ \-]by[ :]|cc[ :])/i) {
3293                         $signoff = 1;
3294                         $empty = 0;
3295                         if (! $opts{'-remove_signoff'}) {
3296                                 print "<span class=\"signoff\">" . esc_html($line) . "</span><br/>\n";
3297                                 next;
3298                         } else {
3299                                 # remove signoff lines
3300                                 next;
3301                         }
3302                 } else {
3303                         $signoff = 0;
3304                 }
3305
3306                 # print only one empty line
3307                 # do not print empty line after signoff
3308                 if ($line eq "") {
3309                         next if ($empty || $signoff);
3310                         $empty = 1;
3311                 } else {
3312                         $empty = 0;
3313                 }
3314
3315                 print format_log_line_html($line) . "<br/>\n";
3316         }
3317
3318         if ($opts{'-final_empty_line'}) {
3319                 # end with single empty line
3320                 print "<br/>\n" unless $empty;
3321         }
3322 }
3323
3324 # return link target (what link points to)
3325 sub git_get_link_target {
3326         my $hash = shift;
3327         my $link_target;
3328
3329         # read link
3330         open my $fd, "-|", git_cmd(), "cat-file", "blob", $hash
3331                 or return;
3332         {
3333                 local $/;
3334                 $link_target = <$fd>;
3335         }
3336         close $fd
3337                 or return;
3338
3339         return $link_target;
3340 }
3341
3342 # given link target, and the directory (basedir) the link is in,
3343 # return target of link relative to top directory (top tree);
3344 # return undef if it is not possible (including absolute links).
3345 sub normalize_link_target {
3346         my ($link_target, $basedir, $hash_base) = @_;
3347
3348         # we can normalize symlink target only if $hash_base is provided
3349         return unless $hash_base;
3350
3351         # absolute symlinks (beginning with '/') cannot be normalized
3352         return if (substr($link_target, 0, 1) eq '/');
3353
3354         # normalize link target to path from top (root) tree (dir)
3355         my $path;
3356         if ($basedir) {
3357                 $path = $basedir . '/' . $link_target;
3358         } else {
3359                 # we are in top (root) tree (dir)
3360                 $path = $link_target;
3361         }
3362
3363         # remove //, /./, and /../
3364         my @path_parts;
3365         foreach my $part (split('/', $path)) {
3366                 # discard '.' and ''
3367                 next if (!$part || $part eq '.');
3368                 # handle '..'
3369                 if ($part eq '..') {
3370                         if (@path_parts) {
3371                                 pop @path_parts;
3372                         } else {
3373                                 # link leads outside repository (outside top dir)
3374                                 return;
3375                         }
3376                 } else {
3377                         push @path_parts, $part;
3378                 }
3379         }
3380         $path = join('/', @path_parts);
3381
3382         return $path;
3383 }
3384
3385 # print tree entry (row of git_tree), but without encompassing <tr> element
3386 sub git_print_tree_entry {
3387         my ($t, $basedir, $hash_base, $have_blame) = @_;
3388
3389         my %base_key = ();
3390         $base_key{'hash_base'} = $hash_base if defined $hash_base;
3391
3392         # The format of a table row is: mode list link.  Where mode is
3393         # the mode of the entry, list is the name of the entry, an href,
3394         # and link is the action links of the entry.
3395
3396         print "<td class=\"mode\">" . mode_str($t->{'mode'}) . "</td>\n";
3397         if ($t->{'type'} eq "blob") {
3398                 print "<td class=\"list\">" .
3399                         $cgi->a({-href => href(action=>"blob", hash=>$t->{'hash'},
3400                                                file_name=>"$basedir$t->{'name'}", %base_key),
3401                                 -class => "list"}, esc_path($t->{'name'}));
3402                 if (S_ISLNK(oct $t->{'mode'})) {
3403                         my $link_target = git_get_link_target($t->{'hash'});
3404                         if ($link_target) {
3405                                 my $norm_target = normalize_link_target($link_target, $basedir, $hash_base);
3406                                 if (defined $norm_target) {
3407                                         print " -> " .
3408                                               $cgi->a({-href => href(action=>"object", hash_base=>$hash_base,
3409                                                                      file_name=>$norm_target),
3410                                                        -title => $norm_target}, esc_path($link_target));
3411                                 } else {
3412                                         print " -> " . esc_path($link_target);
3413                                 }
3414                         }
3415                 }
3416                 print "</td>\n";
3417                 print "<td class=\"link\">";
3418                 print $cgi->a({-href => href(action=>"blob", hash=>$t->{'hash'},
3419                                              file_name=>"$basedir$t->{'name'}", %base_key)},
3420                               "blob");
3421                 if ($have_blame) {
3422                         print " | " .
3423                               $cgi->a({-href => href(action=>"blame", hash=>$t->{'hash'},
3424                                                      file_name=>"$basedir$t->{'name'}", %base_key)},
3425                                       "blame");
3426                 }
3427                 if (defined $hash_base) {
3428                         print " | " .
3429                               $cgi->a({-href => href(action=>"history", hash_base=>$hash_base,
3430                                                      hash=>$t->{'hash'}, file_name=>"$basedir$t->{'name'}")},
3431                                       "history");
3432                 }
3433                 print " | " .
3434                         $cgi->a({-href => href(action=>"blob_plain", hash_base=>$hash_base,
3435                                                file_name=>"$basedir$t->{'name'}")},
3436                                 "raw");
3437                 print "</td>\n";
3438
3439         } elsif ($t->{'type'} eq "tree") {
3440                 print "<td class=\"list\">";
3441                 print $cgi->a({-href => href(action=>"tree", hash=>$t->{'hash'},
3442                                              file_name=>"$basedir$t->{'name'}", %base_key)},
3443                               esc_path($t->{'name'}));
3444                 print "</td>\n";
3445                 print "<td class=\"link\">";
3446                 print $cgi->a({-href => href(action=>"tree", hash=>$t->{'hash'},
3447                                              file_name=>"$basedir$t->{'name'}", %base_key)},
3448                               "tree");
3449                 if (defined $hash_base) {
3450                         print " | " .
3451                               $cgi->a({-href => href(action=>"history", hash_base=>$hash_base,
3452                                                      file_name=>"$basedir$t->{'name'}")},
3453                                       "history");
3454                 }
3455                 print "</td>\n";
3456         } else {
3457                 # unknown object: we can only present history for it
3458                 # (this includes 'commit' object, i.e. submodule support)
3459                 print "<td class=\"list\">" .
3460                       esc_path($t->{'name'}) .
3461                       "</td>\n";
3462                 print "<td class=\"link\">";
3463                 if (defined $hash_base) {
3464                         print $cgi->a({-href => href(action=>"history",
3465                                                      hash_base=>$hash_base,
3466                                                      file_name=>"$basedir$t->{'name'}")},
3467                                       "history");
3468                 }
3469                 print "</td>\n";
3470         }
3471 }
3472
3473 ## ......................................................................
3474 ## functions printing large fragments of HTML
3475
3476 # get pre-image filenames for merge (combined) diff
3477 sub fill_from_file_info {
3478         my ($diff, @parents) = @_;
3479
3480         $diff->{'from_file'} = [ ];
3481         $diff->{'from_file'}[$diff->{'nparents'} - 1] = undef;
3482         for (my $i = 0; $i < $diff->{'nparents'}; $i++) {
3483                 if ($diff->{'status'}[$i] eq 'R' ||
3484                     $diff->{'status'}[$i] eq 'C') {
3485                         $diff->{'from_file'}[$i] =
3486                                 git_get_path_by_hash($parents[$i], $diff->{'from_id'}[$i]);
3487                 }
3488         }
3489
3490         return $diff;
3491 }
3492
3493 # is current raw difftree line of file deletion
3494 sub is_deleted {
3495         my $diffinfo = shift;
3496
3497         return $diffinfo->{'to_id'} eq ('0' x 40);
3498 }
3499
3500 # does patch correspond to [previous] difftree raw line
3501 # $diffinfo  - hashref of parsed raw diff format
3502 # $patchinfo - hashref of parsed patch diff format
3503 #              (the same keys as in $diffinfo)
3504 sub is_patch_split {
3505         my ($diffinfo, $patchinfo) = @_;
3506
3507         return defined $diffinfo && defined $patchinfo
3508                 && $diffinfo->{'to_file'} eq $patchinfo->{'to_file'};
3509 }
3510
3511
3512 sub git_difftree_body {
3513         my ($difftree, $hash, @parents) = @_;
3514         my ($parent) = $parents[0];
3515         my $have_blame = gitweb_check_feature('blame');
3516         print "<div class=\"list_head\">\n";
3517         if ($#{$difftree} > 10) {
3518                 print(($#{$difftree} + 1) . " files changed:\n");
3519         }
3520         print "</div>\n";
3521
3522         print "<table class=\"" .
3523               (@parents > 1 ? "combined " : "") .
3524               "diff_tree\">\n";
3525
3526         # header only for combined diff in 'commitdiff' view
3527         my $has_header = @$difftree && @parents > 1 && $action eq 'commitdiff';
3528         if ($has_header) {
3529                 # table header
3530                 print "<thead><tr>\n" .
3531                        "<th></th><th></th>\n"; # filename, patchN link
3532                 for (my $i = 0; $i < @parents; $i++) {
3533                         my $par = $parents[$i];
3534                         print "<th>" .
3535                               $cgi->a({-href => href(action=>"commitdiff",
3536                                                      hash=>$hash, hash_parent=>$par),
3537                                        -title => 'commitdiff to parent number ' .
3538                                                   ($i+1) . ': ' . substr($par,0,7)},
3539                                       $i+1) .
3540                               "&nbsp;</th>\n";
3541                 }
3542                 print "</tr></thead>\n<tbody>\n";
3543         }
3544
3545         my $alternate = 1;
3546         my $patchno = 0;
3547         foreach my $line (@{$difftree}) {
3548                 my $diff = parsed_difftree_line($line);
3549
3550                 if ($alternate) {
3551                         print "<tr class=\"dark\">\n";
3552                 } else {
3553                         print "<tr class=\"light\">\n";
3554                 }
3555                 $alternate ^= 1;
3556
3557                 if (exists $diff->{'nparents'}) { # combined diff
3558
3559                         fill_from_file_info($diff, @parents)
3560                                 unless exists $diff->{'from_file'};
3561
3562                         if (!is_deleted($diff)) {
3563                                 # file exists in the result (child) commit
3564                                 print "<td>" .
3565                                       $cgi->a({-href => href(action=>"blob", hash=>$diff->{'to_id'},
3566                                                              file_name=>$diff->{'to_file'},
3567                                                              hash_base=>$hash),
3568                                               -class => "list"}, esc_path($diff->{'to_file'})) .
3569                                       "</td>\n";
3570                         } else {
3571                                 print "<td>" .
3572                                       esc_path($diff->{'to_file'}) .
3573                                       "</td>\n";
3574                         }
3575
3576                         if ($action eq 'commitdiff') {
3577                                 # link to patch
3578                                 $patchno++;
3579                                 print "<td class=\"link\">" .
3580                                       $cgi->a({-href => "#patch$patchno"}, "patch") .
3581                                       " | " .
3582                                       "</td>\n";
3583                         }
3584
3585                         my $has_history = 0;
3586                         my $not_deleted = 0;
3587                         for (my $i = 0; $i < $diff->{'nparents'}; $i++) {
3588                                 my $hash_parent = $parents[$i];
3589                                 my $from_hash = $diff->{'from_id'}[$i];
3590                                 my $from_path = $diff->{'from_file'}[$i];
3591                                 my $status = $diff->{'status'}[$i];
3592
3593                                 $has_history ||= ($status ne 'A');
3594                                 $not_deleted ||= ($status ne 'D');
3595
3596                                 if ($status eq 'A') {
3597                                         print "<td  class=\"link\" align=\"right\"> | </td>\n";
3598                                 } elsif ($status eq 'D') {
3599                                         print "<td class=\"link\">" .
3600                                               $cgi->a({-href => href(action=>"blob",
3601                                                                      hash_base=>$hash,
3602                                                                      hash=>$from_hash,
3603                                                                      file_name=>$from_path)},
3604                                                       "blob" . ($i+1)) .
3605                                               " | </td>\n";
3606                                 } else {
3607                                         if ($diff->{'to_id'} eq $from_hash) {
3608                                                 print "<td class=\"link nochange\">";
3609                                         } else {
3610                                                 print "<td class=\"link\">";
3611                                         }
3612                                         print $cgi->a({-href => href(action=>"blobdiff",
3613                                                                      hash=>$diff->{'to_id'},
3614                                                                      hash_parent=>$from_hash,
3615                                                                      hash_base=>$hash,
3616                                                                      hash_parent_base=>$hash_parent,
3617                                                                      file_name=>$diff->{'to_file'},
3618                                                                      file_parent=>$from_path)},
3619                                                       "diff" . ($i+1)) .
3620                                               " | </td>\n";
3621                                 }
3622                         }
3623
3624                         print "<td class=\"link\">";
3625                         if ($not_deleted) {
3626                                 print $cgi->a({-href => href(action=>"blob",
3627                                                              hash=>$diff->{'to_id'},
3628                                                              file_name=>$diff->{'to_file'},
3629                                                              hash_base=>$hash)},
3630                                               "blob");
3631                                 print " | " if ($has_history);
3632                         }
3633                         if ($has_history) {
3634                                 print $cgi->a({-href => href(action=>"history",
3635                                                              file_name=>$diff->{'to_file'},
3636                                                              hash_base=>$hash)},
3637                                               "history");
3638                         }
3639                         print "</td>\n";
3640
3641                         print "</tr>\n";
3642                         next; # instead of 'else' clause, to avoid extra indent
3643                 }
3644                 # else ordinary diff
3645
3646                 my ($to_mode_oct, $to_mode_str, $to_file_type);
3647                 my ($from_mode_oct, $from_mode_str, $from_file_type);
3648                 if ($diff->{'to_mode'} ne ('0' x 6)) {
3649                         $to_mode_oct = oct $diff->{'to_mode'};
3650                         if (S_ISREG($to_mode_oct)) { # only for regular file
3651                                 $to_mode_str = sprintf("%04o", $to_mode_oct & 0777); # permission bits
3652                         }
3653                         $to_file_type = file_type($diff->{'to_mode'});
3654                 }
3655                 if ($diff->{'from_mode'} ne ('0' x 6)) {
3656                         $from_mode_oct = oct $diff->{'from_mode'};
3657                         if (S_ISREG($to_mode_oct)) { # only for regular file
3658                                 $from_mode_str = sprintf("%04o", $from_mode_oct & 0777); # permission bits
3659                         }
3660                         $from_file_type = file_type($diff->{'from_mode'});
3661                 }
3662
3663                 if ($diff->{'status'} eq "A") { # created
3664                         my $mode_chng = "<span class=\"file_status new\">[new $to_file_type";
3665                         $mode_chng   .= " with mode: $to_mode_str" if $to_mode_str;
3666                         $mode_chng   .= "]</span>";
3667                         print "<td>";
3668                         print $cgi->a({-href => href(action=>"blob", hash=>$diff->{'to_id'},
3669                                                      hash_base=>$hash, file_name=>$diff->{'file'}),
3670                                       -class => "list"}, esc_path($diff->{'file'}));
3671                         print "</td>\n";
3672                         print "<td>$mode_chng</td>\n";
3673                         print "<td class=\"link\">";
3674                         if ($action eq 'commitdiff') {
3675                                 # link to patch
3676                                 $patchno++;
3677                                 print $cgi->a({-href => "#patch$patchno"}, "patch");
3678                                 print " | ";
3679                         }
3680                         print $cgi->a({-href => href(action=>"blob", hash=>$diff->{'to_id'},
3681                                                      hash_base=>$hash, file_name=>$diff->{'file'})},
3682                                       "blob");
3683                         print "</td>\n";
3684
3685                 } elsif ($diff->{'status'} eq "D") { # deleted
3686                         my $mode_chng = "<span class=\"file_status deleted\">[deleted $from_file_type]</span>";
3687                         print "<td>";
3688                         print $cgi->a({-href => href(action=>"blob", hash=>$diff->{'from_id'},
3689                                                      hash_base=>$parent, file_name=>$diff->{'file'}),
3690                                        -class => "list"}, esc_path($diff->{'file'}));
3691                         print "</td>\n";
3692                         print "<td>$mode_chng</td>\n";
3693                         print "<td class=\"link\">";
3694                         if ($action eq 'commitdiff') {
3695                                 # link to patch
3696                                 $patchno++;
3697                                 print $cgi->a({-href => "#patch$patchno"}, "patch");
3698                                 print " | ";
3699                         }
3700                         print $cgi->a({-href => href(action=>"blob", hash=>$diff->{'from_id'},
3701                                                      hash_base=>$parent, file_name=>$diff->{'file'})},
3702                                       "blob") . " | ";
3703                         if ($have_blame) {
3704                                 print $cgi->a({-href => href(action=>"blame", hash_base=>$parent,
3705                                                              file_name=>$diff->{'file'})},
3706                                               "blame") . " | ";
3707                         }
3708                         print $cgi->a({-href => href(action=>"history", hash_base=>$parent,
3709                                                      file_name=>$diff->{'file'})},
3710                                       "history");
3711                         print "</td>\n";
3712
3713                 } elsif ($diff->{'status'} eq "M" || $diff->{'status'} eq "T") { # modified, or type changed
3714                         my $mode_chnge = "";
3715                         if ($diff->{'from_mode'} != $diff->{'to_mode'}) {
3716                                 $mode_chnge = "<span class=\"file_status mode_chnge\">[changed";
3717                                 if ($from_file_type ne $to_file_type) {
3718                                         $mode_chnge .= " from $from_file_type to $to_file_type";
3719                                 }
3720                                 if (($from_mode_oct & 0777) != ($to_mode_oct & 0777)) {
3721                                         if ($from_mode_str && $to_mode_str) {
3722                                                 $mode_chnge .= " mode: $from_mode_str->$to_mode_str";
3723                                         } elsif ($to_mode_str) {
3724                                                 $mode_chnge .= " mode: $to_mode_str";
3725                                         }
3726                                 }
3727                                 $mode_chnge .= "]</span>\n";
3728                         }
3729                         print "<td>";
3730                         print $cgi->a({-href => href(action=>"blob", hash=>$diff->{'to_id'},
3731                                                      hash_base=>$hash, file_name=>$diff->{'file'}),
3732                                       -class => "list"}, esc_path($diff->{'file'}));
3733                         print "</td>\n";
3734                         print "<td>$mode_chnge</td>\n";
3735                         print "<td class=\"link\">";
3736                         if ($action eq 'commitdiff') {
3737                                 # link to patch
3738                                 $patchno++;
3739                                 print $cgi->a({-href => "#patch$patchno"}, "patch") .
3740                                       " | ";
3741                         } elsif ($diff->{'to_id'} ne $diff->{'from_id'}) {
3742                                 # "commit" view and modified file (not onlu mode changed)
3743                                 print $cgi->a({-href => href(action=>"blobdiff",
3744                                                              hash=>$diff->{'to_id'}, hash_parent=>$diff->{'from_id'},
3745                                                              hash_base=>$hash, hash_parent_base=>$parent,
3746                                                              file_name=>$diff->{'file'})},
3747                                               "diff") .
3748                                       " | ";
3749                         }
3750                         print $cgi->a({-href => href(action=>"blob", hash=>$diff->{'to_id'},
3751                                                      hash_base=>$hash, file_name=>$diff->{'file'})},
3752                                        "blob") . " | ";
3753                         if ($have_blame) {
3754                                 print $cgi->a({-href => href(action=>"blame", hash_base=>$hash,
3755                                                              file_name=>$diff->{'file'})},
3756                                               "blame") . " | ";
3757                         }
3758                         print $cgi->a({-href => href(action=>"history", hash_base=>$hash,
3759                                                      file_name=>$diff->{'file'})},
3760                                       "history");
3761                         print "</td>\n";
3762
3763                 } elsif ($diff->{'status'} eq "R" || $diff->{'status'} eq "C") { # renamed or copied
3764                         my %status_name = ('R' => 'moved', 'C' => 'copied');
3765                         my $nstatus = $status_name{$diff->{'status'}};
3766                         my $mode_chng = "";
3767                         if ($diff->{'from_mode'} != $diff->{'to_mode'}) {
3768                                 # mode also for directories, so we cannot use $to_mode_str
3769                                 $mode_chng = sprintf(", mode: %04o", $to_mode_oct & 0777);
3770                         }
3771                         print "<td>" .
3772                               $cgi->a({-href => href(action=>"blob", hash_base=>$hash,
3773                                                      hash=>$diff->{'to_id'}, file_name=>$diff->{'to_file'}),
3774                                       -class => "list"}, esc_path($diff->{'to_file'})) . "</td>\n" .
3775                               "<td><span class=\"file_status $nstatus\">[$nstatus from " .
3776                               $cgi->a({-href => href(action=>"blob", hash_base=>$parent,
3777                                                      hash=>$diff->{'from_id'}, file_name=>$diff->{'from_file'}),
3778                                       -class => "list"}, esc_path($diff->{'from_file'})) .
3779                               " with " . (int $diff->{'similarity'}) . "% similarity$mode_chng]</span></td>\n" .
3780                               "<td class=\"link\">";
3781                         if ($action eq 'commitdiff') {
3782                                 # link to patch
3783                                 $patchno++;
3784                                 print $cgi->a({-href => "#patch$patchno"}, "patch") .
3785                                       " | ";
3786                         } elsif ($diff->{'to_id'} ne $diff->{'from_id'}) {
3787                                 # "commit" view and modified file (not only pure rename or copy)
3788                                 print $cgi->a({-href => href(action=>"blobdiff",
3789                                                              hash=>$diff->{'to_id'}, hash_parent=>$diff->{'from_id'},
3790                                                              hash_base=>$hash, hash_parent_base=>$parent,
3791                                                              file_name=>$diff->{'to_file'}, file_parent=>$diff->{'from_file'})},
3792                                               "diff") .
3793                                       " | ";
3794                         }
3795                         print $cgi->a({-href => href(action=>"blob", hash=>$diff->{'to_id'},
3796                                                      hash_base=>$parent, file_name=>$diff->{'to_file'})},
3797                                       "blob") . " | ";
3798                         if ($have_blame) {
3799                                 print $cgi->a({-href => href(action=>"blame", hash_base=>$hash,
3800                                                              file_name=>$diff->{'to_file'})},
3801                                               "blame") . " | ";
3802                         }
3803                         print $cgi->a({-href => href(action=>"history", hash_base=>$hash,
3804                                                     file_name=>$diff->{'to_file'})},
3805                                       "history");
3806                         print "</td>\n";
3807
3808                 } # we should not encounter Unmerged (U) or Unknown (X) status
3809                 print "</tr>\n";
3810         }
3811         print "</tbody>" if $has_header;
3812         print "</table>\n";
3813 }
3814
3815 sub git_patchset_body {
3816         my ($fd, $difftree, $hash, @hash_parents) = @_;
3817         my ($hash_parent) = $hash_parents[0];
3818
3819         my $is_combined = (@hash_parents > 1);
3820         my $patch_idx = 0;
3821         my $patch_number = 0;
3822         my $patch_line;
3823         my $diffinfo;
3824         my $to_name;
3825         my (%from, %to);
3826
3827         print "<div class=\"patchset\">\n";
3828
3829         # skip to first patch
3830         while ($patch_line = <$fd>) {
3831                 chomp $patch_line;
3832
3833                 last if ($patch_line =~ m/^diff /);
3834         }
3835
3836  PATCH:
3837         while ($patch_line) {
3838
3839                 # parse "git diff" header line
3840                 if ($patch_line =~ m/^diff --git (\"(?:[^\\\"]*(?:\\.[^\\\"]*)*)\"|[^ "]*) (.*)$/) {
3841                         # $1 is from_name, which we do not use
3842                         $to_name = unquote($2);
3843                         $to_name =~ s!^b/!!;
3844                 } elsif ($patch_line =~ m/^diff --(cc|combined) ("?.*"?)$/) {
3845                         # $1 is 'cc' or 'combined', which we do not use
3846                         $to_name = unquote($2);
3847                 } else {
3848                         $to_name = undef;
3849                 }
3850
3851                 # check if current patch belong to current raw line
3852                 # and parse raw git-diff line if needed
3853                 if (is_patch_split($diffinfo, { 'to_file' => $to_name })) {
3854                         # this is continuation of a split patch
3855                         print "<div class=\"patch cont\">\n";
3856                 } else {
3857                         # advance raw git-diff output if needed
3858                         $patch_idx++ if defined $diffinfo;
3859
3860                         # read and prepare patch information
3861                         $diffinfo = parsed_difftree_line($difftree->[$patch_idx]);
3862
3863                         # compact combined diff output can have some patches skipped
3864                         # find which patch (using pathname of result) we are at now;
3865                         if ($is_combined) {
3866                                 while ($to_name ne $diffinfo->{'to_file'}) {
3867                                         print "<div class=\"patch\" id=\"patch". ($patch_idx+1) ."\">\n" .
3868                                               format_diff_cc_simplified($diffinfo, @hash_parents) .
3869                                               "</div>\n";  # class="patch"
3870
3871                                         $patch_idx++;
3872                                         $patch_number++;
3873
3874                                         last if $patch_idx > $#$difftree;
3875                                         $diffinfo = parsed_difftree_line($difftree->[$patch_idx]);
3876                                 }
3877                         }
3878
3879                         # modifies %from, %to hashes
3880                         parse_from_to_diffinfo($diffinfo, \%from, \%to, @hash_parents);
3881
3882                         # this is first patch for raw difftree line with $patch_idx index
3883                         # we index @$difftree array from 0, but number patches from 1
3884                         print "<div class=\"patch\" id=\"patch". ($patch_idx+1) ."\">\n";
3885                 }
3886
3887                 # git diff header
3888                 #assert($patch_line =~ m/^diff /) if DEBUG;
3889                 #assert($patch_line !~ m!$/$!) if DEBUG; # is chomp-ed
3890                 $patch_number++;
3891                 # print "git diff" header
3892                 print format_git_diff_header_line($patch_line, $diffinfo,
3893                                                   \%from, \%to);
3894
3895                 # print extended diff header
3896                 print "<div class=\"diff extended_header\">\n";
3897         EXTENDED_HEADER:
3898                 while ($patch_line = <$fd>) {
3899                         chomp $patch_line;
3900
3901                         last EXTENDED_HEADER if ($patch_line =~ m/^--- |^diff /);
3902
3903                         print format_extended_diff_header_line($patch_line, $diffinfo,
3904                                                                \%from, \%to);
3905                 }
3906                 print "</div>\n"; # class="diff extended_header"
3907
3908                 # from-file/to-file diff header
3909                 if (! $patch_line) {
3910                         print "</div>\n"; # class="patch"
3911                         last PATCH;
3912                 }
3913                 next PATCH if ($patch_line =~ m/^diff /);
3914                 #assert($patch_line =~ m/^---/) if DEBUG;
3915
3916                 my $last_patch_line = $patch_line;
3917                 $patch_line = <$fd>;
3918                 chomp $patch_line;
3919                 #assert($patch_line =~ m/^\+\+\+/) if DEBUG;
3920
3921                 print format_diff_from_to_header($last_patch_line, $patch_line,
3922                                                  $diffinfo, \%from, \%to,
3923                                                  @hash_parents);
3924
3925                 # the patch itself
3926         LINE:
3927                 while ($patch_line = <$fd>) {
3928                         chomp $patch_line;
3929
3930                         next PATCH if ($patch_line =~ m/^diff /);
3931
3932                         print format_diff_line($patch_line, \%from, \%to);
3933                 }
3934
3935         } continue {
3936                 print "</div>\n"; # class="patch"
3937         }
3938
3939         # for compact combined (--cc) format, with chunk and patch simpliciaction
3940         # patchset might be empty, but there might be unprocessed raw lines
3941         for (++$patch_idx if $patch_number > 0;
3942              $patch_idx < @$difftree;
3943              ++$patch_idx) {
3944                 # read and prepare patch information
3945                 $diffinfo = parsed_difftree_line($difftree->[$patch_idx]);
3946
3947                 # generate anchor for "patch" links in difftree / whatchanged part
3948                 print "<div class=\"patch\" id=\"patch". ($patch_idx+1) ."\">\n" .
3949                       format_diff_cc_simplified($diffinfo, @hash_parents) .
3950                       "</div>\n";  # class="patch"
3951
3952                 $patch_number++;
3953         }
3954
3955         if ($patch_number == 0) {
3956                 if (@hash_parents > 1) {
3957                         print "<div class=\"diff nodifferences\">Trivial merge</div>\n";
3958                 } else {
3959                         print "<div class=\"diff nodifferences\">No differences found</div>\n";
3960                 }
3961         }
3962
3963         print "</div>\n"; # class="patchset"
3964 }
3965
3966 # . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
3967
3968 # fills project list info (age, description, owner, forks) for each
3969 # project in the list, removing invalid projects from returned list
3970 # NOTE: modifies $projlist, but does not remove entries from it
3971 sub fill_project_list_info {
3972         my ($projlist, $check_forks) = @_;
3973         my @projects;
3974
3975         my $show_ctags = gitweb_check_feature('ctags');
3976  PROJECT:
3977         foreach my $pr (@$projlist) {
3978                 my (@activity) = git_get_last_activity($pr->{'path'});
3979                 unless (@activity) {
3980                         next PROJECT;
3981                 }
3982                 ($pr->{'age'}, $pr->{'age_string'}) = @activity;
3983                 if (!defined $pr->{'descr'}) {
3984                         my $descr = git_get_project_description($pr->{'path'}) || "";
3985                         $descr = to_utf8($descr);
3986                         $pr->{'descr_long'} = $descr;
3987                         $pr->{'descr'} = chop_str($descr, $projects_list_description_width, 5);
3988                 }
3989                 if (!defined $pr->{'owner'}) {
3990                         $pr->{'owner'} = git_get_project_owner("$pr->{'path'}") || "";
3991                 }
3992                 if ($check_forks) {
3993                         my $pname = $pr->{'path'};
3994                         if (($pname =~ s/\.git$//) &&
3995                             ($pname !~ /\/$/) &&
3996                             (-d "$projectroot/$pname")) {
3997                                 $pr->{'forks'} = "-d $projectroot/$pname";
3998                         }       else {
3999                                 $pr->{'forks'} = 0;
4000                         }
4001                 }
4002                 $show_ctags and $pr->{'ctags'} = git_get_project_ctags($pr->{'path'});
4003                 push @projects, $pr;
4004         }
4005
4006         return @projects;
4007 }
4008
4009 # print 'sort by' <th> element, generating 'sort by $name' replay link
4010 # if that order is not selected
4011 sub print_sort_th {
4012         my ($name, $order, $header) = @_;
4013         $header ||= ucfirst($name);
4014
4015         if ($order eq $name) {
4016                 print "<th>$header</th>\n";
4017         } else {
4018                 print "<th>" .
4019                       $cgi->a({-href => href(-replay=>1, order=>$name),
4020                                -class => "header"}, $header) .
4021                       "</th>\n";
4022         }
4023 }
4024
4025 sub git_project_list_body {
4026         # actually uses global variable $project
4027         my ($projlist, $order, $from, $to, $extra, $no_header) = @_;
4028
4029         my $check_forks = gitweb_check_feature('forks');
4030         my @projects = fill_project_list_info($projlist, $check_forks);
4031
4032         $order ||= $default_projects_order;
4033         $from = 0 unless defined $from;
4034         $to = $#projects if (!defined $to || $#projects < $to);
4035
4036         my %order_info = (
4037                 project => { key => 'path', type => 'str' },
4038                 descr => { key => 'descr_long', type => 'str' },
4039                 owner => { key => 'owner', type => 'str' },
4040                 age => { key => 'age', type => 'num' }
4041         );
4042         my $oi = $order_info{$order};
4043         if ($oi->{'type'} eq 'str') {
4044                 @projects = sort {$a->{$oi->{'key'}} cmp $b->{$oi->{'key'}}} @projects;
4045         } else {
4046                 @projects = sort {$a->{$oi->{'key'}} <=> $b->{$oi->{'key'}}} @projects;
4047         }
4048
4049         my $show_ctags = gitweb_check_feature('ctags');
4050         if ($show_ctags) {
4051                 my %ctags;
4052                 foreach my $p (@projects) {
4053                         foreach my $ct (keys %{$p->{'ctags'}}) {
4054                                 $ctags{$ct} += $p->{'ctags'}->{$ct};
4055                         }
4056                 }
4057                 my $cloud = git_populate_project_tagcloud(\%ctags);
4058                 print git_show_project_tagcloud($cloud, 64);
4059         }
4060
4061         print "<table class=\"project_list\">\n";
4062         unless ($no_header) {
4063                 print "<tr>\n";
4064                 if ($check_forks) {
4065                         print "<th></th>\n";
4066                 }
4067                 print_sort_th('project', $order, 'Project');
4068                 print_sort_th('descr', $order, 'Description');
4069                 print_sort_th('owner', $order, 'Owner');
4070                 print_sort_th('age', $order, 'Last Change');
4071                 print "<th></th>\n" . # for links
4072                       "</tr>\n";
4073         }
4074         my $alternate = 1;
4075         my $tagfilter = $cgi->param('by_tag');
4076         for (my $i = $from; $i <= $to; $i++) {
4077                 my $pr = $projects[$i];
4078
4079                 next if $tagfilter and $show_ctags and not grep { lc $_ eq lc $tagfilter } keys %{$pr->{'ctags'}};
4080                 next if $searchtext and not $pr->{'path'} =~ /$searchtext/
4081                         and not $pr->{'descr_long'} =~ /$searchtext/;
4082                 # Weed out forks or non-matching entries of search
4083                 if ($check_forks) {
4084                         my $forkbase = $project; $forkbase ||= ''; $forkbase =~ s#\.git$#/#;
4085                         $forkbase="^$forkbase" if $forkbase;
4086                         next if not $searchtext and not $tagfilter and $show_ctags
4087                                 and $pr->{'path'} =~ m#$forkbase.*/.*#; # regexp-safe
4088                 }
4089
4090                 if ($alternate) {
4091                         print "<tr class=\"dark\">\n";
4092                 } else {
4093                         print "<tr class=\"light\">\n";
4094                 }
4095                 $alternate ^= 1;
4096                 if ($check_forks) {
4097                         print "<td>";
4098                         if ($pr->{'forks'}) {
4099                                 print "<!-- $pr->{'forks'} -->\n";
4100                                 print $cgi->a({-href => href(project=>$pr->{'path'}, action=>"forks")}, "+");
4101                         }
4102                         print "</td>\n";
4103                 }
4104                 print "<td>" . $cgi->a({-href => href(project=>$pr->{'path'}, action=>"summary"),
4105                                         -class => "list"}, esc_html($pr->{'path'})) . "</td>\n" .
4106                       "<td>" . $cgi->a({-href => href(project=>$pr->{'path'}, action=>"summary"),
4107                                         -class => "list", -title => $pr->{'descr_long'}},
4108                                         esc_html($pr->{'descr'})) . "</td>\n" .
4109                       "<td><i>" . chop_and_escape_str($pr->{'owner'}, 15) . "</i></td>\n";
4110                 print "<td class=\"". age_class($pr->{'age'}) . "\">" .
4111                       (defined $pr->{'age_string'} ? $pr->{'age_string'} : "No commits") . "</td>\n" .
4112                       "<td class=\"link\">" .
4113                       $cgi->a({-href => href(project=>$pr->{'path'}, action=>"summary")}, "summary")   . " | " .
4114                       $cgi->a({-href => href(project=>$pr->{'path'}, action=>"shortlog")}, "shortlog") . " | " .
4115                       $cgi->a({-href => href(project=>$pr->{'path'}, action=>"log")}, "log") . " | " .
4116                       $cgi->a({-href => href(project=>$pr->{'path'}, action=>"tree")}, "tree") .
4117                       ($pr->{'forks'} ? " | " . $cgi->a({-href => href(project=>$pr->{'path'}, action=>"forks")}, "forks") : '') .
4118                       "</td>\n" .
4119                       "</tr>\n";
4120         }
4121         if (defined $extra) {
4122                 print "<tr>\n";
4123                 if ($check_forks) {
4124                         print "<td></td>\n";
4125                 }
4126                 print "<td colspan=\"5\">$extra</td>\n" .
4127                       "</tr>\n";
4128         }
4129         print "</table>\n";
4130 }
4131
4132 sub git_shortlog_body {
4133         # uses global variable $project
4134         my ($commitlist, $from, $to, $refs, $extra) = @_;
4135
4136         $from = 0 unless defined $from;
4137         $to = $#{$commitlist} if (!defined $to || $#{$commitlist} < $to);
4138
4139         print "<table class=\"shortlog\">\n";
4140         my $alternate = 1;
4141         for (my $i = $from; $i <= $to; $i++) {
4142                 my %co = %{$commitlist->[$i]};
4143                 my $commit = $co{'id'};
4144                 my $ref = format_ref_marker($refs, $commit);
4145                 if ($alternate) {
4146                         print "<tr class=\"dark\">\n";
4147                 } else {
4148                         print "<tr class=\"light\">\n";
4149                 }
4150                 $alternate ^= 1;
4151                 my $author = chop_and_escape_str($co{'author_name'}, 10);
4152                 # git_summary() used print "<td><i>$co{'age_string'}</i></td>\n" .
4153                 print "<td title=\"$co{'age_string_age'}\"><i>$co{'age_string_date'}</i></td>\n" .
4154                       "<td><i>" . $author . "</i></td>\n" .
4155                       "<td>";
4156                 print format_subject_html($co{'title'}, $co{'title_short'},
4157                                           href(action=>"commit", hash=>$commit), $ref);
4158                 print "</td>\n" .
4159                       "<td class=\"link\">" .
4160                       $cgi->a({-href => href(action=>"commit", hash=>$commit)}, "commit") . " | " .
4161                       $cgi->a({-href => href(action=>"commitdiff", hash=>$commit)}, "commitdiff") . " | " .
4162                       $cgi->a({-href => href(action=>"tree", hash=>$commit, hash_base=>$commit)}, "tree");
4163                 my $snapshot_links = format_snapshot_links($commit);
4164                 if (defined $snapshot_links) {
4165                         print " | " . $snapshot_links;
4166                 }
4167                 print "</td>\n" .
4168                       "</tr>\n";
4169         }
4170         if (defined $extra) {
4171                 print "<tr>\n" .
4172                       "<td colspan=\"4\">$extra</td>\n" .
4173                       "</tr>\n";
4174         }
4175         print "</table>\n";
4176 }
4177
4178 sub git_history_body {
4179         # Warning: assumes constant type (blob or tree) during history
4180         my ($commitlist, $from, $to, $refs, $hash_base, $ftype, $extra) = @_;
4181
4182         $from = 0 unless defined $from;
4183         $to = $#{$commitlist} unless (defined $to && $to <= $#{$commitlist});
4184
4185         print "<table class=\"history\">\n";
4186         my $alternate = 1;
4187         for (my $i = $from; $i <= $to; $i++) {
4188                 my %co = %{$commitlist->[$i]};
4189                 if (!%co) {
4190                         next;
4191                 }
4192                 my $commit = $co{'id'};
4193
4194                 my $ref = format_ref_marker($refs, $commit);
4195
4196                 if ($alternate) {
4197                         print "<tr class=\"dark\">\n";
4198                 } else {
4199                         print "<tr class=\"light\">\n";
4200                 }
4201                 $alternate ^= 1;
4202         # shortlog uses      chop_str($co{'author_name'}, 10)
4203                 my $author = chop_and_escape_str($co{'author_name'}, 15, 3);
4204                 print "<td title=\"$co{'age_string_age'}\"><i>$co{'age_string_date'}</i></td>\n" .
4205                       "<td><i>" . $author . "</i></td>\n" .
4206                       "<td>";
4207                 # originally git_history used chop_str($co{'title'}, 50)
4208                 print format_subject_html($co{'title'}, $co{'title_short'},
4209                                           href(action=>"commit", hash=>$commit), $ref);
4210                 print "</td>\n" .
4211                       "<td class=\"link\">" .
4212                       $cgi->a({-href => href(action=>$ftype, hash_base=>$commit, file_name=>$file_name)}, $ftype) . " | " .
4213                       $cgi->a({-href => href(action=>"commitdiff", hash=>$commit)}, "commitdiff");
4214
4215                 if ($ftype eq 'blob') {
4216                         my $blob_current = git_get_hash_by_path($hash_base, $file_name);
4217                         my $blob_parent  = git_get_hash_by_path($commit, $file_name);
4218                         if (defined $blob_current && defined $blob_parent &&
4219                                         $blob_current ne $blob_parent) {
4220                                 print " | " .
4221                                         $cgi->a({-href => href(action=>"blobdiff",
4222                                                                hash=>$blob_current, hash_parent=>$blob_parent,
4223                                                                hash_base=>$hash_base, hash_parent_base=>$commit,
4224                                                                file_name=>$file_name)},
4225                                                 "diff to current");
4226                         }
4227                 }
4228                 print "</td>\n" .
4229                       "</tr>\n";
4230         }
4231         if (defined $extra) {
4232                 print "<tr>\n" .
4233                       "<td colspan=\"4\">$extra</td>\n" .
4234                       "</tr>\n";
4235         }
4236         print "</table>\n";
4237 }
4238
4239 sub git_tags_body {
4240         # uses global variable $project
4241         my ($taglist, $from, $to, $extra) = @_;
4242         $from = 0 unless defined $from;
4243         $to = $#{$taglist} if (!defined $to || $#{$taglist} < $to);
4244
4245         print "<table class=\"tags\">\n";
4246         my $alternate = 1;
4247         for (my $i = $from; $i <= $to; $i++) {
4248                 my $entry = $taglist->[$i];
4249                 my %tag = %$entry;
4250                 my $comment = $tag{'subject'};
4251                 my $comment_short;
4252                 if (defined $comment) {
4253                         $comment_short = chop_str($comment, 30, 5);
4254                 }
4255                 if ($alternate) {
4256                         print "<tr class=\"dark\">\n";
4257                 } else {
4258                         print "<tr class=\"light\">\n";
4259                 }
4260                 $alternate ^= 1;
4261                 if (defined $tag{'age'}) {
4262                         print "<td><i>$tag{'age'}</i></td>\n";
4263                 } else {
4264                         print "<td></td>\n";
4265                 }
4266                 print "<td>" .
4267                       $cgi->a({-href => href(action=>$tag{'reftype'}, hash=>$tag{'refid'}),
4268                                -class => "list name"}, esc_html($tag{'name'})) .
4269                       "</td>\n" .
4270                       "<td>";
4271                 if (defined $comment) {
4272                         print format_subject_html($comment, $comment_short,
4273                                                   href(action=>"tag", hash=>$tag{'id'}));
4274                 }
4275                 print "</td>\n" .
4276                       "<td class=\"selflink\">";
4277                 if ($tag{'type'} eq "tag") {
4278                         print $cgi->a({-href => href(action=>"tag", hash=>$tag{'id'})}, "tag");
4279                 } else {
4280                         print "&nbsp;";
4281                 }
4282                 print "</td>\n" .
4283                       "<td class=\"link\">" . " | " .
4284                       $cgi->a({-href => href(action=>$tag{'reftype'}, hash=>$tag{'refid'})}, $tag{'reftype'});
4285                 if ($tag{'reftype'} eq "commit") {
4286                         print " | " . $cgi->a({-href => href(action=>"shortlog", hash=>$tag{'fullname'})}, "shortlog") .
4287                               " | " . $cgi->a({-href => href(action=>"log", hash=>$tag{'fullname'})}, "log");
4288                 } elsif ($tag{'reftype'} eq "blob") {
4289                         print " | " . $cgi->a({-href => href(action=>"blob_plain", hash=>$tag{'refid'})}, "raw");
4290                 }
4291                 print "</td>\n" .
4292                       "</tr>";
4293         }
4294         if (defined $extra) {
4295                 print "<tr>\n" .
4296                       "<td colspan=\"5\">$extra</td>\n" .
4297                       "</tr>\n";
4298         }
4299         print "</table>\n";
4300 }
4301
4302 sub git_heads_body {
4303         # uses global variable $project
4304         my ($headlist, $head, $from, $to, $extra) = @_;
4305         $from = 0 unless defined $from;
4306         $to = $#{$headlist} if (!defined $to || $#{$headlist} < $to);
4307
4308         print "<table class=\"heads\">\n";
4309         my $alternate = 1;
4310         for (my $i = $from; $i <= $to; $i++) {
4311                 my $entry = $headlist->[$i];
4312                 my %ref = %$entry;
4313                 my $curr = $ref{'id'} eq $head;
4314                 if ($alternate) {
4315                         print "<tr class=\"dark\">\n";
4316                 } else {
4317                         print "<tr class=\"light\">\n";
4318                 }
4319                 $alternate ^= 1;
4320                 print "<td><i>$ref{'age'}</i></td>\n" .
4321                       ($curr ? "<td class=\"current_head\">" : "<td>") .
4322                       $cgi->a({-href => href(action=>"shortlog", hash=>$ref{'fullname'}),
4323                                -class => "list name"},esc_html($ref{'name'})) .
4324                       "</td>\n" .
4325                       "<td class=\"link\">" .
4326                       $cgi->a({-href => href(action=>"shortlog", hash=>$ref{'fullname'})}, "shortlog") . " | " .
4327                       $cgi->a({-href => href(action=>"log", hash=>$ref{'fullname'})}, "log") . " | " .
4328                       $cgi->a({-href => href(action=>"tree", hash=>$ref{'fullname'}, hash_base=>$ref{'name'})}, "tree") .
4329                       "</td>\n" .
4330                       "</tr>";
4331         }
4332         if (defined $extra) {
4333                 print "<tr>\n" .
4334                       "<td colspan=\"3\">$extra</td>\n" .
4335                       "</tr>\n";
4336         }
4337         print "</table>\n";
4338 }
4339
4340 sub git_search_grep_body {
4341         my ($commitlist, $from, $to, $extra) = @_;
4342         $from = 0 unless defined $from;
4343         $to = $#{$commitlist} if (!defined $to || $#{$commitlist} < $to);
4344
4345         print "<table class=\"commit_search\">\n";
4346         my $alternate = 1;
4347         for (my $i = $from; $i <= $to; $i++) {
4348                 my %co = %{$commitlist->[$i]};
4349                 if (!%co) {
4350                         next;
4351                 }
4352                 my $commit = $co{'id'};
4353                 if ($alternate) {
4354                         print "<tr class=\"dark\">\n";
4355                 } else {
4356                         print "<tr class=\"light\">\n";
4357                 }
4358                 $alternate ^= 1;
4359                 my $author = chop_and_escape_str($co{'author_name'}, 15, 5);
4360                 print "<td title=\"$co{'age_string_age'}\"><i>$co{'age_string_date'}</i></td>\n" .
4361                       "<td><i>" . $author . "</i></td>\n" .
4362                       "<td>" .
4363                       $cgi->a({-href => href(action=>"commit", hash=>$co{'id'}),
4364                                -class => "list subject"},
4365                               chop_and_escape_str($co{'title'}, 50) . "<br/>");
4366                 my $comment = $co{'comment'};
4367                 foreach my $line (@$comment) {
4368                         if ($line =~ m/^(.*?)($search_regexp)(.*)$/i) {
4369                                 my ($lead, $match, $trail) = ($1, $2, $3);
4370                                 $match = chop_str($match, 70, 5, 'center');
4371                                 my $contextlen = int((80 - length($match))/2);
4372                                 $contextlen = 30 if ($contextlen > 30);
4373                                 $lead  = chop_str($lead,  $contextlen, 10, 'left');
4374                                 $trail = chop_str($trail, $contextlen, 10, 'right');
4375
4376                                 $lead  = esc_html($lead);
4377                                 $match = esc_html($match);
4378                                 $trail = esc_html($trail);
4379
4380                                 print "$lead<span class=\"match\">$match</span>$trail<br />";
4381                         }
4382                 }
4383                 print "</td>\n" .
4384                       "<td class=\"link\">" .
4385                       $cgi->a({-href => href(action=>"commit", hash=>$co{'id'})}, "commit") .
4386                       " | " .
4387                       $cgi->a({-href => href(action=>"commitdiff", hash=>$co{'id'})}, "commitdiff") .
4388                       " | " .
4389                       $cgi->a({-href => href(action=>"tree", hash=>$co{'tree'}, hash_base=>$co{'id'})}, "tree");
4390                 print "</td>\n" .
4391                       "</tr>\n";
4392         }
4393         if (defined $extra) {
4394                 print "<tr>\n" .
4395                       "<td colspan=\"3\">$extra</td>\n" .
4396                       "</tr>\n";
4397         }
4398         print "</table>\n";
4399 }
4400
4401 ## ======================================================================
4402 ## ======================================================================
4403 ## actions
4404
4405 sub git_project_list {
4406         my $order = $input_params{'order'};
4407         if (defined $order && $order !~ m/none|project|descr|owner|age/) {
4408                 die_error(400, "Unknown order parameter");
4409         }
4410
4411         my @list = git_get_projects_list();
4412         if (!@list) {
4413                 die_error(404, "No projects found");
4414         }
4415
4416         git_header_html();
4417         if (-f $home_text) {
4418                 print "<div class=\"index_include\">\n";
4419                 insert_file($home_text);
4420                 print "</div>\n";
4421         }
4422         print $cgi->startform(-method => "get") .
4423               "<p class=\"projsearch\">Search:\n" .
4424               $cgi->textfield(-name => "s", -value => $searchtext) . "\n" .
4425               "</p>" .
4426               $cgi->end_form() . "\n";
4427         git_project_list_body(\@list, $order);
4428         git_footer_html();
4429 }
4430
4431 sub git_forks {
4432         my $order = $input_params{'order'};
4433         if (defined $order && $order !~ m/none|project|descr|owner|age/) {
4434                 die_error(400, "Unknown order parameter");
4435         }
4436
4437         my @list = git_get_projects_list($project);
4438         if (!@list) {
4439                 die_error(404, "No forks found");
4440         }
4441
4442         git_header_html();
4443         git_print_page_nav('','');
4444         git_print_header_div('summary', "$project forks");
4445         git_project_list_body(\@list, $order);
4446         git_footer_html();
4447 }
4448
4449 sub git_project_index {
4450         my @projects = git_get_projects_list($project);
4451
4452         print $cgi->header(
4453                 -type => 'text/plain',
4454                 -charset => 'utf-8',
4455                 -content_disposition => 'inline; filename="index.aux"');
4456
4457         foreach my $pr (@projects) {
4458                 if (!exists $pr->{'owner'}) {
4459                         $pr->{'owner'} = git_get_project_owner("$pr->{'path'}");
4460                 }
4461
4462                 my ($path, $owner) = ($pr->{'path'}, $pr->{'owner'});
4463                 # quote as in CGI::Util::encode, but keep the slash, and use '+' for ' '
4464                 $path  =~ s/([^a-zA-Z0-9_.\-\/ ])/sprintf("%%%02X", ord($1))/eg;
4465                 $owner =~ s/([^a-zA-Z0-9_.\-\/ ])/sprintf("%%%02X", ord($1))/eg;
4466                 $path  =~ s/ /\+/g;
4467                 $owner =~ s/ /\+/g;
4468
4469                 print "$path $owner\n";
4470         }
4471 }
4472
4473 sub git_summary {
4474         my $descr = git_get_project_description($project) || "none";
4475         my %co = parse_commit("HEAD");
4476         my %cd = %co ? parse_date($co{'committer_epoch'}, $co{'committer_tz'}) : ();
4477         my $head = $co{'id'};
4478
4479         my $owner = git_get_project_owner($project);
4480
4481         my $refs = git_get_references();
4482         # These get_*_list functions return one more to allow us to see if
4483         # there are more ...
4484         my @taglist  = git_get_tags_list(16);
4485         my @headlist = git_get_heads_list(16);
4486         my @forklist;
4487         my $check_forks = gitweb_check_feature('forks');
4488
4489         if ($check_forks) {
4490                 @forklist = git_get_projects_list($project);
4491         }
4492
4493         git_header_html();
4494         git_print_page_nav('summary','', $head);
4495
4496         print "<div class=\"title\">&nbsp;</div>\n";
4497         print "<table class=\"projects_list\">\n" .
4498               "<tr id=\"metadata_desc\"><td>description</td><td>" . esc_html($descr) . "</td></tr>\n" .
4499               "<tr id=\"metadata_owner\"><td>owner</td><td>" . esc_html($owner) . "</td></tr>\n";
4500         if (defined $cd{'rfc2822'}) {
4501                 print "<tr id=\"metadata_lchange\"><td>last change</td><td>$cd{'rfc2822'}</td></tr>\n";
4502         }
4503
4504         # use per project git URL list in $projectroot/$project/cloneurl
4505         # or make project git URL from git base URL and project name
4506         my $url_tag = "URL";
4507         my @url_list = git_get_project_url_list($project);
4508         @url_list = map { "$_/$project" } @git_base_url_list unless @url_list;
4509         foreach my $git_url (@url_list) {
4510                 next unless $git_url;
4511                 print "<tr class=\"metadata_url\"><td>$url_tag</td><td>$git_url</td></tr>\n";
4512                 $url_tag = "";
4513         }
4514
4515         # Tag cloud
4516         my $show_ctags = gitweb_check_feature('ctags');
4517         if ($show_ctags) {
4518                 my $ctags = git_get_project_ctags($project);
4519                 my $cloud = git_populate_project_tagcloud($ctags);
4520                 print "<tr id=\"metadata_ctags\"><td>Content tags:<br />";
4521                 print "</td>\n<td>" unless %$ctags;
4522                 print "<form action=\"$show_ctags\" method=\"post\"><input type=\"hidden\" name=\"p\" value=\"$project\" />Add: <input type=\"text\" name=\"t\" size=\"8\" /></form>";
4523                 print "</td>\n<td>" if %$ctags;
4524                 print git_show_project_tagcloud($cloud, 48);
4525                 print "</td></tr>";
4526         }
4527
4528         print "</table>\n";
4529
4530         # If XSS prevention is on, we don't include README.html.
4531         # TODO: Allow a readme in some safe format.
4532         if (!$prevent_xss && -s "$projectroot/$project/README.html") {
4533                 print "<div class=\"title\">readme</div>\n" .
4534                       "<div class=\"readme\">\n";
4535                 insert_file("$projectroot/$project/README.html");
4536                 print "\n</div>\n"; # class="readme"
4537         }
4538
4539         # we need to request one more than 16 (0..15) to check if
4540         # those 16 are all
4541         my @commitlist = $head ? parse_commits($head, 17) : ();
4542         if (@commitlist) {
4543                 git_print_header_div('shortlog');
4544                 git_shortlog_body(\@commitlist, 0, 15, $refs,
4545                                   $#commitlist <=  15 ? undef :
4546                                   $cgi->a({-href => href(action=>"shortlog")}, "..."));
4547         }
4548
4549         if (@taglist) {
4550                 git_print_header_div('tags');
4551                 git_tags_body(\@taglist, 0, 15,
4552                               $#taglist <=  15 ? undef :
4553                               $cgi->a({-href => href(action=>"tags")}, "..."));
4554         }
4555
4556         if (@headlist) {
4557                 git_print_header_div('heads');
4558                 git_heads_body(\@headlist, $head, 0, 15,
4559                                $#headlist <= 15 ? undef :
4560                                $cgi->a({-href => href(action=>"heads")}, "..."));
4561         }
4562
4563         if (@forklist) {
4564                 git_print_header_div('forks');
4565                 git_project_list_body(\@forklist, 'age', 0, 15,
4566                                       $#forklist <= 15 ? undef :
4567                                       $cgi->a({-href => href(action=>"forks")}, "..."),
4568                                       'no_header');
4569         }
4570
4571         git_footer_html();
4572 }
4573
4574 sub git_tag {
4575         my $head = git_get_head_hash($project);
4576         git_header_html();
4577         git_print_page_nav('','', $head,undef,$head);
4578         my %tag = parse_tag($hash);
4579
4580         if (! %tag) {
4581                 die_error(404, "Unknown tag object");
4582         }
4583
4584         git_print_header_div('commit', esc_html($tag{'name'}), $hash);
4585         print "<div class=\"title_text\">\n" .
4586               "<table class=\"object_header\">\n" .
4587               "<tr>\n" .
4588               "<td>object</td>\n" .
4589               "<td>" . $cgi->a({-class => "list", -href => href(action=>$tag{'type'}, hash=>$tag{'object'})},
4590                                $tag{'object'}) . "</td>\n" .
4591               "<td class=\"link\">" . $cgi->a({-href => href(action=>$tag{'type'}, hash=>$tag{'object'})},
4592                                               $tag{'type'}) . "</td>\n" .
4593               "</tr>\n";
4594         if (defined($tag{'author'})) {
4595                 my %ad = parse_date($tag{'epoch'}, $tag{'tz'});
4596                 print "<tr><td>author</td><td>" . esc_html($tag{'author'}) . "</td></tr>\n";
4597                 print "<tr><td></td><td>" . $ad{'rfc2822'} .
4598                         sprintf(" (%02d:%02d %s)", $ad{'hour_local'}, $ad{'minute_local'}, $ad{'tz_local'}) .
4599                         "</td></tr>\n";
4600         }
4601         print "</table>\n\n" .
4602               "</div>\n";
4603         print "<div class=\"page_body\">";
4604         my $comment = $tag{'comment'};
4605         foreach my $line (@$comment) {
4606                 chomp $line;
4607                 print esc_html($line, -nbsp=>1) . "<br/>\n";
4608         }
4609         print "</div>\n";
4610         git_footer_html();
4611 }
4612
4613 sub git_blame {
4614         # permissions
4615         gitweb_check_feature('blame')
4616                 or die_error(403, "Blame view not allowed");
4617
4618         # error checking
4619         die_error(400, "No file name given") unless $file_name;
4620         $hash_base ||= git_get_head_hash($project);
4621         die_error(404, "Couldn't find base commit") unless $hash_base;
4622         my %co = parse_commit($hash_base)
4623                 or die_error(404, "Commit not found");
4624         my $ftype = "blob";
4625         if (!defined $hash) {
4626                 $hash = git_get_hash_by_path($hash_base, $file_name, "blob")
4627                         or die_error(404, "Error looking up file");
4628         } else {
4629                 $ftype = git_get_type($hash);
4630                 if ($ftype !~ "blob") {
4631                         die_error(400, "Object is not a blob");
4632                 }
4633         }
4634
4635         # run git-blame --porcelain
4636         open my $fd, "-|", git_cmd(), "blame", '-p',
4637                 $hash_base, '--', $file_name
4638                 or die_error(500, "Open git-blame failed");
4639
4640         # page header
4641         git_header_html();
4642         my $formats_nav =
4643                 $cgi->a({-href => href(action=>"blob", -replay=>1)},
4644                         "blob") .
4645                 " | " .
4646                 $cgi->a({-href => href(action=>"history", -replay=>1)},
4647                         "history") .
4648                 " | " .
4649                 $cgi->a({-href => href(action=>"blame", file_name=>$file_name)},
4650                         "HEAD");
4651         git_print_page_nav('','', $hash_base,$co{'tree'},$hash_base, $formats_nav);
4652         git_print_header_div('commit', esc_html($co{'title'}), $hash_base);
4653         git_print_page_path($file_name, $ftype, $hash_base);
4654
4655         # page body
4656         my @rev_color = qw(light2 dark2);
4657         my $num_colors = scalar(@rev_color);
4658         my $current_color = 0;
4659         my %metainfo = ();
4660
4661         print <<HTML;
4662 <div class="page_body">
4663 <table class="blame">
4664 <tr><th>Commit</th><th>Line</th><th>Data</th></tr>
4665 HTML
4666  LINE:
4667         while (my $line = <$fd>) {
4668                 chomp $line;
4669                 # the header: <SHA-1> <src lineno> <dst lineno> [<lines in group>]
4670                 # no <lines in group> for subsequent lines in group of lines
4671                 my ($full_rev, $orig_lineno, $lineno, $group_size) =
4672                    ($line =~ /^([0-9a-f]{40}) (\d+) (\d+)(?: (\d+))?$/);
4673                 if (!exists $metainfo{$full_rev}) {
4674                         $metainfo{$full_rev} = {};
4675                 }
4676                 my $meta = $metainfo{$full_rev};
4677                 my $data;
4678                 while ($data = <$fd>) {
4679                         chomp $data;
4680                         last if ($data =~ s/^\t//); # contents of line
4681                         if ($data =~ /^(\S+) (.*)$/) {
4682                                 $meta->{$1} = $2;
4683                         }
4684                 }
4685                 my $short_rev = substr($full_rev, 0, 8);
4686                 my $author = $meta->{'author'};
4687                 my %date =
4688                         parse_date($meta->{'author-time'}, $meta->{'author-tz'});
4689                 my $date = $date{'iso-tz'};
4690                 if ($group_size) {
4691                         $current_color = ($current_color + 1) % $num_colors;
4692                 }
4693                 print "<tr id=\"l$lineno\" class=\"$rev_color[$current_color]\">\n";
4694                 if ($group_size) {
4695                         print "<td class=\"sha1\"";
4696                         print " title=\"". esc_html($author) . ", $date\"";
4697                         print " rowspan=\"$group_size\"" if ($group_size > 1);
4698                         print ">";
4699                         print $cgi->a({-href => href(action=>"commit",
4700                                                      hash=>$full_rev,
4701                                                      file_name=>$file_name)},
4702                                       esc_html($short_rev));
4703                         print "</td>\n";
4704                 }
4705                 my $parent_commit;
4706                 if (!exists $meta->{'parent'}) {
4707                         open (my $dd, "-|", git_cmd(), "rev-parse", "$full_rev^")
4708                                 or die_error(500, "Open git-rev-parse failed");
4709                         $parent_commit = <$dd>;
4710                         close $dd;
4711                         chomp($parent_commit);
4712                         $meta->{'parent'} = $parent_commit;
4713                 } else {
4714                         $parent_commit = $meta->{'parent'};
4715                 }
4716                 my $blamed = href(action => 'blame',
4717                                   file_name => $meta->{'filename'},
4718                                   hash_base => $parent_commit);
4719                 print "<td class=\"linenr\">";
4720                 print $cgi->a({ -href => "$blamed#l$orig_lineno",
4721                                 -class => "linenr" },
4722                               esc_html($lineno));
4723                 print "</td>";
4724                 print "<td class=\"pre\">" . esc_html($data) . "</td>\n";
4725                 print "</tr>\n";
4726         }
4727         print "</table>\n";
4728         print "</div>";
4729         close $fd
4730                 or print "Reading blob failed\n";
4731
4732         # page footer
4733         git_footer_html();
4734 }
4735
4736 sub git_tags {
4737         my $head = git_get_head_hash($project);
4738         git_header_html();
4739         git_print_page_nav('','', $head,undef,$head);
4740         git_print_header_div('summary', $project);
4741
4742         my @tagslist = git_get_tags_list();
4743         if (@tagslist) {
4744                 git_tags_body(\@tagslist);
4745         }
4746         git_footer_html();
4747 }
4748
4749 sub git_heads {
4750         my $head = git_get_head_hash($project);
4751         git_header_html();
4752         git_print_page_nav('','', $head,undef,$head);
4753         git_print_header_div('summary', $project);
4754
4755         my @headslist = git_get_heads_list();
4756         if (@headslist) {
4757                 git_heads_body(\@headslist, $head);
4758         }
4759         git_footer_html();
4760 }
4761
4762 sub git_blob_plain {
4763         my $type = shift;
4764         my $expires;
4765
4766         if (!defined $hash) {
4767                 if (defined $file_name) {
4768                         my $base = $hash_base || git_get_head_hash($project);
4769                         $hash = git_get_hash_by_path($base, $file_name, "blob")
4770                                 or die_error(404, "Cannot find file");
4771                 } else {
4772                         die_error(400, "No file name defined");
4773                 }
4774         } elsif ($hash =~ m/^[0-9a-fA-F]{40}$/) {
4775                 # blobs defined by non-textual hash id's can be cached
4776                 $expires = "+1d";
4777         }
4778
4779         open my $fd, "-|", git_cmd(), "cat-file", "blob", $hash
4780                 or die_error(500, "Open git-cat-file blob '$hash' failed");
4781
4782         # content-type (can include charset)
4783         $type = blob_contenttype($fd, $file_name, $type);
4784
4785         # "save as" filename, even when no $file_name is given
4786         my $save_as = "$hash";
4787         if (defined $file_name) {
4788                 $save_as = $file_name;
4789         } elsif ($type =~ m/^text\//) {
4790                 $save_as .= '.txt';
4791         }
4792
4793         # With XSS prevention on, blobs of all types except a few known safe
4794         # ones are served with "Content-Disposition: attachment" to make sure
4795         # they don't run in our security domain.  For certain image types,
4796         # blob view writes an <img> tag referring to blob_plain view, and we
4797         # want to be sure not to break that by serving the image as an
4798         # attachment (though Firefox 3 doesn't seem to care).
4799         my $sandbox = $prevent_xss &&
4800                 $type !~ m!^(?:text/plain|image/(?:gif|png|jpeg))$!;
4801
4802         print $cgi->header(
4803                 -type => $type,
4804                 -expires => $expires,
4805                 -content_disposition =>
4806                         ($sandbox ? 'attachment' : 'inline')
4807                         . '; filename="' . $save_as . '"');
4808         undef $/;
4809         binmode STDOUT, ':raw';
4810         print <$fd>;
4811         binmode STDOUT, ':utf8'; # as set at the beginning of gitweb.cgi
4812         $/ = "\n";
4813         close $fd;
4814 }
4815
4816 sub git_blob {
4817         my $expires;
4818
4819         if (!defined $hash) {
4820                 if (defined $file_name) {
4821                         my $base = $hash_base || git_get_head_hash($project);
4822                         $hash = git_get_hash_by_path($base, $file_name, "blob")
4823                                 or die_error(404, "Cannot find file");
4824                 } else {
4825                         die_error(400, "No file name defined");
4826                 }
4827         } elsif ($hash =~ m/^[0-9a-fA-F]{40}$/) {
4828                 # blobs defined by non-textual hash id's can be cached
4829                 $expires = "+1d";
4830         }
4831
4832         my $have_blame = gitweb_check_feature('blame');
4833         open my $fd, "-|", git_cmd(), "cat-file", "blob", $hash
4834                 or die_error(500, "Couldn't cat $file_name, $hash");
4835         my $mimetype = blob_mimetype($fd, $file_name);
4836         if ($mimetype !~ m!^(?:text/|image/(?:gif|png|jpeg)$)! && -B $fd) {
4837                 close $fd;
4838                 return git_blob_plain($mimetype);
4839         }
4840         # we can have blame only for text/* mimetype
4841         $have_blame &&= ($mimetype =~ m!^text/!);
4842
4843         git_header_html(undef, $expires);
4844         my $formats_nav = '';
4845         if (defined $hash_base && (my %co = parse_commit($hash_base))) {
4846                 if (defined $file_name) {
4847                         if ($have_blame) {
4848                                 $formats_nav .=
4849                                         $cgi->a({-href => href(action=>"blame", -replay=>1)},
4850                                                 "blame") .
4851                                         " | ";
4852                         }
4853                         $formats_nav .=
4854                                 $cgi->a({-href => href(action=>"history", -replay=>1)},
4855                                         "history") .
4856                                 " | " .
4857                                 $cgi->a({-href => href(action=>"blob_plain", -replay=>1)},
4858                                         "raw") .
4859                                 " | " .
4860                                 $cgi->a({-href => href(action=>"blob",
4861                                                        hash_base=>"HEAD", file_name=>$file_name)},
4862                                         "HEAD");
4863                 } else {
4864                         $formats_nav .=
4865                                 $cgi->a({-href => href(action=>"blob_plain", -replay=>1)},
4866                                         "raw");
4867                 }
4868                 git_print_page_nav('','', $hash_base,$co{'tree'},$hash_base, $formats_nav);
4869                 git_print_header_div('commit', esc_html($co{'title'}), $hash_base);
4870         } else {
4871                 print "<div class=\"page_nav\">\n" .
4872                       "<br/><br/></div>\n" .
4873                       "<div class=\"title\">$hash</div>\n";
4874         }
4875         git_print_page_path($file_name, "blob", $hash_base);
4876         print "<div class=\"page_body\">\n";
4877         if ($mimetype =~ m!^image/!) {
4878                 print qq!<img type="$mimetype"!;
4879                 if ($file_name) {
4880                         print qq! alt="$file_name" title="$file_name"!;
4881                 }
4882                 print qq! src="! .
4883                       href(action=>"blob_plain", hash=>$hash,
4884                            hash_base=>$hash_base, file_name=>$file_name) .
4885                       qq!" />\n!;
4886         } else {
4887                 my $nr;
4888                 while (my $line = <$fd>) {
4889                         chomp $line;
4890                         $nr++;
4891                         $line = untabify($line);
4892                         printf "<div class=\"pre\"><a id=\"l%i\" href=\"#l%i\" class=\"linenr\">%4i</a> %s</div>\n",
4893                                $nr, $nr, $nr, esc_html($line, -nbsp=>1);
4894                 }
4895         }
4896         close $fd
4897                 or print "Reading blob failed.\n";
4898         print "</div>";
4899         git_footer_html();
4900 }
4901
4902 sub git_tree {
4903         if (!defined $hash_base) {
4904                 $hash_base = "HEAD";
4905         }
4906         if (!defined $hash) {
4907                 if (defined $file_name) {
4908                         $hash = git_get_hash_by_path($hash_base, $file_name, "tree");
4909                 } else {
4910                         $hash = $hash_base;
4911                 }
4912         }
4913         die_error(404, "No such tree") unless defined($hash);
4914         $/ = "\0";
4915         open my $fd, "-|", git_cmd(), "ls-tree", '-z', $hash
4916                 or die_error(500, "Open git-ls-tree failed");
4917         my @entries = map { chomp; $_ } <$fd>;
4918         close $fd or die_error(404, "Reading tree failed");
4919         $/ = "\n";
4920
4921         my $refs = git_get_references();
4922         my $ref = format_ref_marker($refs, $hash_base);
4923         git_header_html();
4924         my $basedir = '';
4925         my $have_blame = gitweb_check_feature('blame');
4926         if (defined $hash_base && (my %co = parse_commit($hash_base))) {
4927                 my @views_nav = ();
4928                 if (defined $file_name) {
4929                         push @views_nav,
4930                                 $cgi->a({-href => href(action=>"history", -replay=>1)},
4931                                         "history"),
4932                                 $cgi->a({-href => href(action=>"tree",
4933                                                        hash_base=>"HEAD", file_name=>$file_name)},
4934                                         "HEAD"),
4935                 }
4936                 my $snapshot_links = format_snapshot_links($hash);
4937                 if (defined $snapshot_links) {
4938                         # FIXME: Should be available when we have no hash base as well.
4939                         push @views_nav, $snapshot_links;
4940                 }
4941                 git_print_page_nav('tree','', $hash_base, undef, undef, join(' | ', @views_nav));
4942                 git_print_header_div('commit', esc_html($co{'title'}) . $ref, $hash_base);
4943         } else {
4944                 undef $hash_base;
4945                 print "<div class=\"page_nav\">\n";
4946                 print "<br/><br/></div>\n";
4947                 print "<div class=\"title\">$hash</div>\n";
4948         }
4949         if (defined $file_name) {
4950                 $basedir = $file_name;
4951                 if ($basedir ne '' && substr($basedir, -1) ne '/') {
4952                         $basedir .= '/';
4953                 }
4954                 git_print_page_path($file_name, 'tree', $hash_base);
4955         }
4956         print "<div class=\"page_body\">\n";
4957         print "<table class=\"tree\">\n";
4958         my $alternate = 1;
4959         # '..' (top directory) link if possible
4960         if (defined $hash_base &&
4961             defined $file_name && $file_name =~ m![^/]+$!) {
4962                 if ($alternate) {
4963                         print "<tr class=\"dark\">\n";
4964                 } else {
4965                         print "<tr class=\"light\">\n";
4966                 }
4967                 $alternate ^= 1;
4968
4969                 my $up = $file_name;
4970                 $up =~ s!/?[^/]+$!!;
4971                 undef $up unless $up;
4972                 # based on git_print_tree_entry
4973                 print '<td class="mode">' . mode_str('040000') . "</td>\n";
4974                 print '<td class="list">';
4975                 print $cgi->a({-href => href(action=>"tree", hash_base=>$hash_base,
4976                                              file_name=>$up)},
4977                               "..");
4978                 print "</td>\n";
4979                 print "<td class=\"link\"></td>\n";
4980
4981                 print "</tr>\n";
4982         }
4983         foreach my $line (@entries) {
4984                 my %t = parse_ls_tree_line($line, -z => 1);
4985
4986                 if ($alternate) {
4987                         print "<tr class=\"dark\">\n";
4988                 } else {
4989                         print "<tr class=\"light\">\n";
4990                 }
4991                 $alternate ^= 1;
4992
4993                 git_print_tree_entry(\%t, $basedir, $hash_base, $have_blame);
4994
4995                 print "</tr>\n";
4996         }
4997         print "</table>\n" .
4998               "</div>";
4999         git_footer_html();
5000 }
5001
5002 sub git_snapshot {
5003         my $format = $input_params{'snapshot_format'};
5004         if (!@snapshot_fmts) {
5005                 die_error(403, "Snapshots not allowed");
5006         }
5007         # default to first supported snapshot format
5008         $format ||= $snapshot_fmts[0];
5009         if ($format !~ m/^[a-z0-9]+$/) {
5010                 die_error(400, "Invalid snapshot format parameter");
5011         } elsif (!exists($known_snapshot_formats{$format})) {
5012                 die_error(400, "Unknown snapshot format");
5013         } elsif (!grep($_ eq $format, @snapshot_fmts)) {
5014                 die_error(403, "Unsupported snapshot format");
5015         }
5016
5017         if (!defined $hash) {
5018                 $hash = git_get_head_hash($project);
5019         }
5020
5021         my $name = $project;
5022         $name =~ s,([^/])/*\.git$,$1,;
5023         $name = basename($name);
5024         my $filename = to_utf8($name);
5025         $name =~ s/\047/\047\\\047\047/g;
5026         my $cmd;
5027         $filename .= "-$hash$known_snapshot_formats{$format}{'suffix'}";
5028         $cmd = quote_command(
5029                 git_cmd(), 'archive',
5030                 "--format=$known_snapshot_formats{$format}{'format'}",
5031                 "--prefix=$name/", $hash);
5032         if (exists $known_snapshot_formats{$format}{'compressor'}) {
5033                 $cmd .= ' | ' . quote_command(@{$known_snapshot_formats{$format}{'compressor'}});
5034         }
5035
5036         print $cgi->header(
5037                 -type => $known_snapshot_formats{$format}{'type'},
5038                 -content_disposition => 'inline; filename="' . "$filename" . '"',
5039                 -status => '200 OK');
5040
5041         open my $fd, "-|", $cmd
5042                 or die_error(500, "Execute git-archive failed");
5043         binmode STDOUT, ':raw';
5044         print <$fd>;
5045         binmode STDOUT, ':utf8'; # as set at the beginning of gitweb.cgi
5046         close $fd;
5047 }
5048
5049 sub git_log {
5050         my $head = git_get_head_hash($project);
5051         if (!defined $hash) {
5052                 $hash = $head;
5053         }
5054         if (!defined $page) {
5055                 $page = 0;
5056         }
5057         my $refs = git_get_references();
5058
5059         my @commitlist = parse_commits($hash, 101, (100 * $page));
5060
5061         my $paging_nav = format_paging_nav('log', $hash, $head, $page, $#commitlist >= 100);
5062
5063         my ($patch_max) = gitweb_get_feature('patches');
5064         if ($patch_max) {
5065                 if ($patch_max < 0 || @commitlist <= $patch_max) {
5066                         $paging_nav .= " &sdot; " .
5067                                 $cgi->a({-href => href(action=>"patches", -replay=>1)},
5068                                         "patches");
5069                 }
5070         }
5071
5072         git_header_html();
5073         git_print_page_nav('log','', $hash,undef,undef, $paging_nav);
5074
5075         if (!@commitlist) {
5076                 my %co = parse_commit($hash);
5077
5078                 git_print_header_div('summary', $project);
5079                 print "<div class=\"page_body\"> Last change $co{'age_string'}.<br/><br/></div>\n";
5080         }
5081         my $to = ($#commitlist >= 99) ? (99) : ($#commitlist);
5082         for (my $i = 0; $i <= $to; $i++) {
5083                 my %co = %{$commitlist[$i]};
5084                 next if !%co;
5085                 my $commit = $co{'id'};
5086                 my $ref = format_ref_marker($refs, $commit);
5087                 my %ad = parse_date($co{'author_epoch'});
5088                 git_print_header_div('commit',
5089                                "<span class=\"age\">$co{'age_string'}</span>" .
5090                                esc_html($co{'title'}) . $ref,
5091                                $commit);
5092                 print "<div class=\"title_text\">\n" .
5093                       "<div class=\"log_link\">\n" .
5094                       $cgi->a({-href => href(action=>"commit", hash=>$commit)}, "commit") .
5095                       " | " .
5096                       $cgi->a({-href => href(action=>"commitdiff", hash=>$commit)}, "commitdiff") .
5097                       " | " .
5098                       $cgi->a({-href => href(action=>"tree", hash=>$commit, hash_base=>$commit)}, "tree") .
5099                       "<br/>\n" .
5100                       "</div>\n" .
5101                       "<i>" . esc_html($co{'author_name'}) .  " [$ad{'rfc2822'}]</i><br/>\n" .
5102                       "</div>\n";
5103
5104                 print "<div class=\"log_body\">\n";
5105                 git_print_log($co{'comment'}, -final_empty_line=> 1);
5106                 print "</div>\n";
5107         }
5108         if ($#commitlist >= 100) {
5109                 print "<div class=\"page_nav\">\n";
5110                 print $cgi->a({-href => href(-replay=>1, page=>$page+1),
5111                                -accesskey => "n", -title => "Alt-n"}, "next");
5112                 print "</div>\n";
5113         }
5114         git_footer_html();
5115 }
5116
5117 sub git_commit {
5118         $hash ||= $hash_base || "HEAD";
5119         my %co = parse_commit($hash)
5120             or die_error(404, "Unknown commit object");
5121         my %ad = parse_date($co{'author_epoch'}, $co{'author_tz'});
5122         my %cd = parse_date($co{'committer_epoch'}, $co{'committer_tz'});
5123
5124         my $parent  = $co{'parent'};
5125         my $parents = $co{'parents'}; # listref
5126
5127         # we need to prepare $formats_nav before any parameter munging
5128         my $formats_nav;
5129         if (!defined $parent) {
5130                 # --root commitdiff
5131                 $formats_nav .= '(initial)';
5132         } elsif (@$parents == 1) {
5133                 # single parent commit
5134                 $formats_nav .=
5135                         '(parent: ' .
5136                         $cgi->a({-href => href(action=>"commit",
5137                                                hash=>$parent)},
5138                                 esc_html(substr($parent, 0, 7))) .
5139                         ')';
5140         } else {
5141                 # merge commit
5142                 $formats_nav .=
5143                         '(merge: ' .
5144                         join(' ', map {
5145                                 $cgi->a({-href => href(action=>"commit",
5146                                                        hash=>$_)},
5147                                         esc_html(substr($_, 0, 7)));
5148                         } @$parents ) .
5149                         ')';
5150         }
5151         if (gitweb_check_feature('patches')) {
5152                 $formats_nav .= " | " .
5153                         $cgi->a({-href => href(action=>"patch", -replay=>1)},
5154                                 "patch");
5155         }
5156
5157         if (!defined $parent) {
5158                 $parent = "--root";
5159         }
5160         my @difftree;
5161         open my $fd, "-|", git_cmd(), "diff-tree", '-r', "--no-commit-id",
5162                 @diff_opts,
5163                 (@$parents <= 1 ? $parent : '-c'),
5164                 $hash, "--"
5165                 or die_error(500, "Open git-diff-tree failed");
5166         @difftree = map { chomp; $_ } <$fd>;
5167         close $fd or die_error(404, "Reading git-diff-tree failed");
5168
5169         # non-textual hash id's can be cached
5170         my $expires;
5171         if ($hash =~ m/^[0-9a-fA-F]{40}$/) {
5172                 $expires = "+1d";
5173         }
5174         my $refs = git_get_references();
5175         my $ref = format_ref_marker($refs, $co{'id'});
5176
5177         git_header_html(undef, $expires);
5178         git_print_page_nav('commit', '',
5179                            $hash, $co{'tree'}, $hash,
5180                            $formats_nav);
5181
5182         if (defined $co{'parent'}) {
5183                 git_print_header_div('commitdiff', esc_html($co{'title'}) . $ref, $hash);
5184         } else {
5185                 git_print_header_div('tree', esc_html($co{'title'}) . $ref, $co{'tree'}, $hash);
5186         }
5187         print "<div class=\"title_text\">\n" .
5188               "<table class=\"object_header\">\n";
5189         print "<tr><td>author</td><td>" . esc_html($co{'author'}) . "</td></tr>\n".
5190               "<tr>" .
5191               "<td></td><td> $ad{'rfc2822'}";
5192         if ($ad{'hour_local'} < 6) {
5193                 printf(" (<span class=\"atnight\">%02d:%02d</span> %s)",
5194                        $ad{'hour_local'}, $ad{'minute_local'}, $ad{'tz_local'});
5195         } else {
5196                 printf(" (%02d:%02d %s)",
5197                        $ad{'hour_local'}, $ad{'minute_local'}, $ad{'tz_local'});
5198         }
5199         print "</td>" .
5200               "</tr>\n";
5201         print "<tr><td>committer</td><td>" . esc_html($co{'committer'}) . "</td></tr>\n";
5202         print "<tr><td></td><td> $cd{'rfc2822'}" .
5203               sprintf(" (%02d:%02d %s)", $cd{'hour_local'}, $cd{'minute_local'}, $cd{'tz_local'}) .
5204               "</td></tr>\n";
5205         print "<tr><td>commit</td><td class=\"sha1\">$co{'id'}</td></tr>\n";
5206         print "<tr>" .
5207               "<td>tree</td>" .
5208               "<td class=\"sha1\">" .
5209               $cgi->a({-href => href(action=>"tree", hash=>$co{'tree'}, hash_base=>$hash),
5210                        class => "list"}, $co{'tree'}) .
5211               "</td>" .
5212               "<td class=\"link\">" .
5213               $cgi->a({-href => href(action=>"tree", hash=>$co{'tree'}, hash_base=>$hash)},
5214                       "tree");
5215         my $snapshot_links = format_snapshot_links($hash);
5216         if (defined $snapshot_links) {
5217                 print " | " . $snapshot_links;
5218         }
5219         print "</td>" .
5220               "</tr>\n";
5221
5222         foreach my $par (@$parents) {
5223                 print "<tr>" .
5224                       "<td>parent</td>" .
5225                       "<td class=\"sha1\">" .
5226                       $cgi->a({-href => href(action=>"commit", hash=>$par),
5227                                class => "list"}, $par) .
5228                       "</td>" .
5229                       "<td class=\"link\">" .
5230                       $cgi->a({-href => href(action=>"commit", hash=>$par)}, "commit") .
5231                       " | " .
5232                       $cgi->a({-href => href(action=>"commitdiff", hash=>$hash, hash_parent=>$par)}, "diff") .
5233                       "</td>" .
5234                       "</tr>\n";
5235         }
5236         print "</table>".
5237               "</div>\n";
5238
5239         print "<div class=\"page_body\">\n";
5240         git_print_log($co{'comment'});
5241         print "</div>\n";
5242
5243         git_difftree_body(\@difftree, $hash, @$parents);
5244
5245         git_footer_html();
5246 }
5247
5248 sub git_object {
5249         # object is defined by:
5250         # - hash or hash_base alone
5251         # - hash_base and file_name
5252         my $type;
5253
5254         # - hash or hash_base alone
5255         if ($hash || ($hash_base && !defined $file_name)) {
5256                 my $object_id = $hash || $hash_base;
5257
5258                 open my $fd, "-|", quote_command(
5259                         git_cmd(), 'cat-file', '-t', $object_id) . ' 2> /dev/null'
5260                         or die_error(404, "Object does not exist");
5261                 $type = <$fd>;
5262                 chomp $type;
5263                 close $fd
5264                         or die_error(404, "Object does not exist");
5265
5266         # - hash_base and file_name
5267         } elsif ($hash_base && defined $file_name) {
5268                 $file_name =~ s,/+$,,;
5269
5270                 system(git_cmd(), "cat-file", '-e', $hash_base) == 0
5271                         or die_error(404, "Base object does not exist");
5272
5273                 # here errors should not hapen
5274                 open my $fd, "-|", git_cmd(), "ls-tree", $hash_base, "--", $file_name
5275                         or die_error(500, "Open git-ls-tree failed");
5276                 my $line = <$fd>;
5277                 close $fd;
5278
5279                 #'100644 blob 0fa3f3a66fb6a137f6ec2c19351ed4d807070ffa  panic.c'
5280                 unless ($line && $line =~ m/^([0-9]+) (.+) ([0-9a-fA-F]{40})\t/) {
5281                         die_error(404, "File or directory for given base does not exist");
5282                 }
5283                 $type = $2;
5284                 $hash = $3;
5285         } else {
5286                 die_error(400, "Not enough information to find object");
5287         }
5288
5289         print $cgi->redirect(-uri => href(action=>$type, -full=>1,
5290                                           hash=>$hash, hash_base=>$hash_base,
5291                                           file_name=>$file_name),
5292                              -status => '302 Found');
5293 }
5294
5295 sub git_blobdiff {
5296         my $format = shift || 'html';
5297
5298         my $fd;
5299         my @difftree;
5300         my %diffinfo;
5301         my $expires;
5302
5303         # preparing $fd and %diffinfo for git_patchset_body
5304         # new style URI
5305         if (defined $hash_base && defined $hash_parent_base) {
5306                 if (defined $file_name) {
5307                         # read raw output
5308                         open $fd, "-|", git_cmd(), "diff-tree", '-r', @diff_opts,
5309                                 $hash_parent_base, $hash_base,
5310                                 "--", (defined $file_parent ? $file_parent : ()), $file_name
5311                                 or die_error(500, "Open git-diff-tree failed");
5312                         @difftree = map { chomp; $_ } <$fd>;
5313                         close $fd
5314                                 or die_error(404, "Reading git-diff-tree failed");
5315                         @difftree
5316                                 or die_error(404, "Blob diff not found");
5317
5318                 } elsif (defined $hash &&
5319                          $hash =~ /[0-9a-fA-F]{40}/) {
5320                         # try to find filename from $hash
5321
5322                         # read filtered raw output
5323                         open $fd, "-|", git_cmd(), "diff-tree", '-r', @diff_opts,
5324                                 $hash_parent_base, $hash_base, "--"
5325                                 or die_error(500, "Open git-diff-tree failed");
5326                         @difftree =
5327                                 # ':100644 100644 03b21826... 3b93d5e7... M     ls-files.c'
5328                                 # $hash == to_id
5329                                 grep { /^:[0-7]{6} [0-7]{6} [0-9a-fA-F]{40} $hash/ }
5330                                 map { chomp; $_ } <$fd>;
5331                         close $fd
5332                                 or die_error(404, "Reading git-diff-tree failed");
5333                         @difftree
5334                                 or die_error(404, "Blob diff not found");
5335
5336                 } else {
5337                         die_error(400, "Missing one of the blob diff parameters");
5338                 }
5339
5340                 if (@difftree > 1) {
5341                         die_error(400, "Ambiguous blob diff specification");
5342                 }
5343
5344                 %diffinfo = parse_difftree_raw_line($difftree[0]);
5345                 $file_parent ||= $diffinfo{'from_file'} || $file_name;
5346                 $file_name   ||= $diffinfo{'to_file'};
5347
5348                 $hash_parent ||= $diffinfo{'from_id'};
5349                 $hash        ||= $diffinfo{'to_id'};
5350
5351                 # non-textual hash id's can be cached
5352                 if ($hash_base =~ m/^[0-9a-fA-F]{40}$/ &&
5353                     $hash_parent_base =~ m/^[0-9a-fA-F]{40}$/) {
5354                         $expires = '+1d';
5355                 }
5356
5357                 # open patch output
5358                 open $fd, "-|", git_cmd(), "diff-tree", '-r', @diff_opts,
5359                         '-p', ($format eq 'html' ? "--full-index" : ()),
5360                         $hash_parent_base, $hash_base,
5361                         "--", (defined $file_parent ? $file_parent : ()), $file_name
5362                         or die_error(500, "Open git-diff-tree failed");
5363         }
5364
5365         # old/legacy style URI -- not generated anymore since 1.4.3.
5366         if (!%diffinfo) {
5367                 die_error('404 Not Found', "Missing one of the blob diff parameters")
5368         }
5369
5370         # header
5371         if ($format eq 'html') {
5372                 my $formats_nav =
5373                         $cgi->a({-href => href(action=>"blobdiff_plain", -replay=>1)},
5374                                 "raw");
5375                 git_header_html(undef, $expires);
5376                 if (defined $hash_base && (my %co = parse_commit($hash_base))) {
5377                         git_print_page_nav('','', $hash_base,$co{'tree'},$hash_base, $formats_nav);
5378                         git_print_header_div('commit', esc_html($co{'title'}), $hash_base);
5379                 } else {
5380                         print "<div class=\"page_nav\"><br/>$formats_nav<br/></div>\n";
5381                         print "<div class=\"title\">$hash vs $hash_parent</div>\n";
5382                 }
5383                 if (defined $file_name) {
5384                         git_print_page_path($file_name, "blob", $hash_base);
5385                 } else {
5386                         print "<div class=\"page_path\"></div>\n";
5387                 }
5388
5389         } elsif ($format eq 'plain') {
5390                 print $cgi->header(
5391                         -type => 'text/plain',
5392                         -charset => 'utf-8',
5393                         -expires => $expires,
5394                         -content_disposition => 'inline; filename="' . "$file_name" . '.patch"');
5395
5396                 print "X-Git-Url: " . $cgi->self_url() . "\n\n";
5397
5398         } else {
5399                 die_error(400, "Unknown blobdiff format");
5400         }
5401
5402         # patch
5403         if ($format eq 'html') {
5404                 print "<div class=\"page_body\">\n";
5405
5406                 git_patchset_body($fd, [ \%diffinfo ], $hash_base, $hash_parent_base);
5407                 close $fd;
5408
5409                 print "</div>\n"; # class="page_body"
5410                 git_footer_html();
5411
5412         } else {
5413                 while (my $line = <$fd>) {
5414                         $line =~ s!a/($hash|$hash_parent)!'a/'.esc_path($diffinfo{'from_file'})!eg;
5415                         $line =~ s!b/($hash|$hash_parent)!'b/'.esc_path($diffinfo{'to_file'})!eg;
5416
5417                         print $line;
5418
5419                         last if $line =~ m!^\+\+\+!;
5420                 }
5421                 local $/ = undef;
5422                 print <$fd>;
5423                 close $fd;
5424         }
5425 }
5426
5427 sub git_blobdiff_plain {
5428         git_blobdiff('plain');
5429 }
5430
5431 sub git_commitdiff {
5432         my %params = @_;
5433         my $format = $params{-format} || 'html';
5434
5435         my ($patch_max) = gitweb_get_feature('patches');
5436         if ($format eq 'patch') {
5437                 die_error(403, "Patch view not allowed") unless $patch_max;
5438         }
5439
5440         $hash ||= $hash_base || "HEAD";
5441         my %co = parse_commit($hash)
5442             or die_error(404, "Unknown commit object");
5443
5444         # choose format for commitdiff for merge
5445         if (! defined $hash_parent && @{$co{'parents'}} > 1) {
5446                 $hash_parent = '--cc';
5447         }
5448         # we need to prepare $formats_nav before almost any parameter munging
5449         my $formats_nav;
5450         if ($format eq 'html') {
5451                 $formats_nav =
5452                         $cgi->a({-href => href(action=>"commitdiff_plain", -replay=>1)},
5453                                 "raw");
5454                 if ($patch_max) {
5455                         $formats_nav .= " | " .
5456                                 $cgi->a({-href => href(action=>"patch", -replay=>1)},
5457                                         "patch");
5458                 }
5459
5460                 if (defined $hash_parent &&
5461                     $hash_parent ne '-c' && $hash_parent ne '--cc') {
5462                         # commitdiff with two commits given
5463                         my $hash_parent_short = $hash_parent;
5464                         if ($hash_parent =~ m/^[0-9a-fA-F]{40}$/) {
5465                                 $hash_parent_short = substr($hash_parent, 0, 7);
5466                         }
5467                         $formats_nav .=
5468                                 ' (from';
5469                         for (my $i = 0; $i < @{$co{'parents'}}; $i++) {
5470                                 if ($co{'parents'}[$i] eq $hash_parent) {
5471                                         $formats_nav .= ' parent ' . ($i+1);
5472                                         last;
5473                                 }
5474                         }
5475                         $formats_nav .= ': ' .
5476                                 $cgi->a({-href => href(action=>"commitdiff",
5477                                                        hash=>$hash_parent)},
5478                                         esc_html($hash_parent_short)) .
5479                                 ')';
5480                 } elsif (!$co{'parent'}) {
5481                         # --root commitdiff
5482                         $formats_nav .= ' (initial)';
5483                 } elsif (scalar @{$co{'parents'}} == 1) {
5484                         # single parent commit
5485                         $formats_nav .=
5486                                 ' (parent: ' .
5487                                 $cgi->a({-href => href(action=>"commitdiff",
5488                                                        hash=>$co{'parent'})},
5489                                         esc_html(substr($co{'parent'}, 0, 7))) .
5490                                 ')';
5491                 } else {
5492                         # merge commit
5493                         if ($hash_parent eq '--cc') {
5494                                 $formats_nav .= ' | ' .
5495                                         $cgi->a({-href => href(action=>"commitdiff",
5496                                                                hash=>$hash, hash_parent=>'-c')},
5497                                                 'combined');
5498                         } else { # $hash_parent eq '-c'
5499                                 $formats_nav .= ' | ' .
5500                                         $cgi->a({-href => href(action=>"commitdiff",
5501                                                                hash=>$hash, hash_parent=>'--cc')},
5502                                                 'compact');
5503                         }
5504                         $formats_nav .=
5505                                 ' (merge: ' .
5506                                 join(' ', map {
5507                                         $cgi->a({-href => href(action=>"commitdiff",
5508                                                                hash=>$_)},
5509                                                 esc_html(substr($_, 0, 7)));
5510                                 } @{$co{'parents'}} ) .
5511                                 ')';
5512                 }
5513         }
5514
5515         my $hash_parent_param = $hash_parent;
5516         if (!defined $hash_parent_param) {
5517                 # --cc for multiple parents, --root for parentless
5518                 $hash_parent_param =
5519                         @{$co{'parents'}} > 1 ? '--cc' : $co{'parent'} || '--root';
5520         }
5521
5522         # read commitdiff
5523         my $fd;
5524         my @difftree;
5525         if ($format eq 'html') {
5526                 open $fd, "-|", git_cmd(), "diff-tree", '-r', @diff_opts,
5527                         "--no-commit-id", "--patch-with-raw", "--full-index",
5528                         $hash_parent_param, $hash, "--"
5529                         or die_error(500, "Open git-diff-tree failed");
5530
5531                 while (my $line = <$fd>) {
5532                         chomp $line;
5533                         # empty line ends raw part of diff-tree output
5534                         last unless $line;
5535                         push @difftree, scalar parse_difftree_raw_line($line);
5536                 }
5537
5538         } elsif ($format eq 'plain') {
5539                 open $fd, "-|", git_cmd(), "diff-tree", '-r', @diff_opts,
5540                         '-p', $hash_parent_param, $hash, "--"
5541                         or die_error(500, "Open git-diff-tree failed");
5542         } elsif ($format eq 'patch') {
5543                 # For commit ranges, we limit the output to the number of
5544                 # patches specified in the 'patches' feature.
5545                 # For single commits, we limit the output to a single patch,
5546                 # diverging from the git-format-patch default.
5547                 my @commit_spec = ();
5548                 if ($hash_parent) {
5549                         if ($patch_max > 0) {
5550                                 push @commit_spec, "-$patch_max";
5551                         }
5552                         push @commit_spec, '-n', "$hash_parent..$hash";
5553                 } else {
5554                         if ($params{-single}) {
5555                                 push @commit_spec, '-1';
5556                         } else {
5557                                 if ($patch_max > 0) {
5558                                         push @commit_spec, "-$patch_max";
5559                                 }
5560                                 push @commit_spec, "-n";
5561                         }
5562                         push @commit_spec, '--root', $hash;
5563                 }
5564                 open $fd, "-|", git_cmd(), "format-patch", '--encoding=utf8',
5565                         '--stdout', @commit_spec
5566                         or die_error(500, "Open git-format-patch failed");
5567         } else {
5568                 die_error(400, "Unknown commitdiff format");
5569         }
5570
5571         # non-textual hash id's can be cached
5572         my $expires;
5573         if ($hash =~ m/^[0-9a-fA-F]{40}$/) {
5574                 $expires = "+1d";
5575         }
5576
5577         # write commit message
5578         if ($format eq 'html') {
5579                 my $refs = git_get_references();
5580                 my $ref = format_ref_marker($refs, $co{'id'});
5581
5582                 git_header_html(undef, $expires);
5583                 git_print_page_nav('commitdiff','', $hash,$co{'tree'},$hash, $formats_nav);
5584                 git_print_header_div('commit', esc_html($co{'title'}) . $ref, $hash);
5585                 git_print_authorship(\%co);
5586                 print "<div class=\"page_body\">\n";
5587                 if (@{$co{'comment'}} > 1) {
5588                         print "<div class=\"log\">\n";
5589                         git_print_log($co{'comment'}, -final_empty_line=> 1, -remove_title => 1);
5590                         print "</div>\n"; # class="log"
5591                 }
5592
5593         } elsif ($format eq 'plain') {
5594                 my $refs = git_get_references("tags");
5595                 my $tagname = git_get_rev_name_tags($hash);
5596                 my $filename = basename($project) . "-$hash.patch";
5597
5598                 print $cgi->header(
5599                         -type => 'text/plain',
5600                         -charset => 'utf-8',
5601                         -expires => $expires,
5602                         -content_disposition => 'inline; filename="' . "$filename" . '"');
5603                 my %ad = parse_date($co{'author_epoch'}, $co{'author_tz'});
5604                 print "From: " . to_utf8($co{'author'}) . "\n";
5605                 print "Date: $ad{'rfc2822'} ($ad{'tz_local'})\n";
5606                 print "Subject: " . to_utf8($co{'title'}) . "\n";
5607
5608                 print "X-Git-Tag: $tagname\n" if $tagname;
5609                 print "X-Git-Url: " . $cgi->self_url() . "\n\n";
5610
5611                 foreach my $line (@{$co{'comment'}}) {
5612                         print to_utf8($line) . "\n";
5613                 }
5614                 print "---\n\n";
5615         } elsif ($format eq 'patch') {
5616                 my $filename = basename($project) . "-$hash.patch";
5617
5618                 print $cgi->header(
5619                         -type => 'text/plain',
5620                         -charset => 'utf-8',
5621                         -expires => $expires,
5622                         -content_disposition => 'inline; filename="' . "$filename" . '"');
5623         }
5624
5625         # write patch
5626         if ($format eq 'html') {
5627                 my $use_parents = !defined $hash_parent ||
5628                         $hash_parent eq '-c' || $hash_parent eq '--cc';
5629                 git_difftree_body(\@difftree, $hash,
5630                                   $use_parents ? @{$co{'parents'}} : $hash_parent);
5631                 print "<br/>\n";
5632
5633                 git_patchset_body($fd, \@difftree, $hash,
5634                                   $use_parents ? @{$co{'parents'}} : $hash_parent);
5635                 close $fd;
5636                 print "</div>\n"; # class="page_body"
5637                 git_footer_html();
5638
5639         } elsif ($format eq 'plain') {
5640                 local $/ = undef;
5641                 print <$fd>;
5642                 close $fd
5643                         or print "Reading git-diff-tree failed\n";
5644         } elsif ($format eq 'patch') {
5645                 local $/ = undef;
5646                 print <$fd>;
5647                 close $fd
5648                         or print "Reading git-format-patch failed\n";
5649         }
5650 }
5651
5652 sub git_commitdiff_plain {
5653         git_commitdiff(-format => 'plain');
5654 }
5655
5656 # format-patch-style patches
5657 sub git_patch {
5658         git_commitdiff(-format => 'patch', -single=> 1);
5659 }
5660
5661 sub git_patches {
5662         git_commitdiff(-format => 'patch');
5663 }
5664
5665 sub git_history {
5666         if (!defined $hash_base) {
5667                 $hash_base = git_get_head_hash($project);
5668         }
5669         if (!defined $page) {
5670                 $page = 0;
5671         }
5672         my $ftype;
5673         my %co = parse_commit($hash_base)
5674             or die_error(404, "Unknown commit object");
5675
5676         my $refs = git_get_references();
5677         my $limit = sprintf("--max-count=%i", (100 * ($page+1)));
5678
5679         my @commitlist = parse_commits($hash_base, 101, (100 * $page),
5680                                        $file_name, "--full-history")
5681             or die_error(404, "No such file or directory on given branch");
5682
5683         if (!defined $hash && defined $file_name) {
5684                 # some commits could have deleted file in question,
5685                 # and not have it in tree, but one of them has to have it
5686                 for (my $i = 0; $i <= @commitlist; $i++) {
5687                         $hash = git_get_hash_by_path($commitlist[$i]{'id'}, $file_name);
5688                         last if defined $hash;
5689                 }
5690         }
5691         if (defined $hash) {
5692                 $ftype = git_get_type($hash);
5693         }
5694         if (!defined $ftype) {
5695                 die_error(500, "Unknown type of object");
5696         }
5697
5698         my $paging_nav = '';
5699         if ($page > 0) {
5700                 $paging_nav .=
5701                         $cgi->a({-href => href(action=>"history", hash=>$hash, hash_base=>$hash_base,
5702                                                file_name=>$file_name)},
5703                                 "first");
5704                 $paging_nav .= " &sdot; " .
5705                         $cgi->a({-href => href(-replay=>1, page=>$page-1),
5706                                  -accesskey => "p", -title => "Alt-p"}, "prev");
5707         } else {
5708                 $paging_nav .= "first";
5709                 $paging_nav .= " &sdot; prev";
5710         }
5711         my $next_link = '';
5712         if ($#commitlist >= 100) {
5713                 $next_link =
5714                         $cgi->a({-href => href(-replay=>1, page=>$page+1),
5715                                  -accesskey => "n", -title => "Alt-n"}, "next");
5716                 $paging_nav .= " &sdot; $next_link";
5717         } else {
5718                 $paging_nav .= " &sdot; next";
5719         }
5720
5721         git_header_html();
5722         git_print_page_nav('history','', $hash_base,$co{'tree'},$hash_base, $paging_nav);
5723         git_print_header_div('commit', esc_html($co{'title'}), $hash_base);
5724         git_print_page_path($file_name, $ftype, $hash_base);
5725
5726         git_history_body(\@commitlist, 0, 99,
5727                          $refs, $hash_base, $ftype, $next_link);
5728
5729         git_footer_html();
5730 }
5731
5732 sub git_search {
5733         gitweb_check_feature('search') or die_error(403, "Search is disabled");
5734         if (!defined $searchtext) {
5735                 die_error(400, "Text field is empty");
5736         }
5737         if (!defined $hash) {
5738                 $hash = git_get_head_hash($project);
5739         }
5740         my %co = parse_commit($hash);
5741         if (!%co) {
5742                 die_error(404, "Unknown commit object");
5743         }
5744         if (!defined $page) {
5745                 $page = 0;
5746         }
5747
5748         $searchtype ||= 'commit';
5749         if ($searchtype eq 'pickaxe') {
5750                 # pickaxe may take all resources of your box and run for several minutes
5751                 # with every query - so decide by yourself how public you make this feature
5752                 gitweb_check_feature('pickaxe')
5753                     or die_error(403, "Pickaxe is disabled");
5754         }
5755         if ($searchtype eq 'grep') {
5756                 gitweb_check_feature('grep')
5757                     or die_error(403, "Grep is disabled");
5758         }
5759
5760         git_header_html();
5761
5762         if ($searchtype eq 'commit' or $searchtype eq 'author' or $searchtype eq 'committer') {
5763                 my $greptype;
5764                 if ($searchtype eq 'commit') {
5765                         $greptype = "--grep=";
5766                 } elsif ($searchtype eq 'author') {
5767                         $greptype = "--author=";
5768                 } elsif ($searchtype eq 'committer') {
5769                         $greptype = "--committer=";
5770                 }
5771                 $greptype .= $searchtext;
5772                 my @commitlist = parse_commits($hash, 101, (100 * $page), undef,
5773                                                $greptype, '--regexp-ignore-case',
5774                                                $search_use_regexp ? '--extended-regexp' : '--fixed-strings');
5775
5776                 my $paging_nav = '';
5777                 if ($page > 0) {
5778                         $paging_nav .=
5779                                 $cgi->a({-href => href(action=>"search", hash=>$hash,
5780                                                        searchtext=>$searchtext,
5781                                                        searchtype=>$searchtype)},
5782                                         "first");
5783                         $paging_nav .= " &sdot; " .
5784                                 $cgi->a({-href => href(-replay=>1, page=>$page-1),
5785                                          -accesskey => "p", -title => "Alt-p"}, "prev");
5786                 } else {
5787                         $paging_nav .= "first";
5788                         $paging_nav .= " &sdot; prev";
5789                 }
5790                 my $next_link = '';
5791                 if ($#commitlist >= 100) {
5792                         $next_link =
5793                                 $cgi->a({-href => href(-replay=>1, page=>$page+1),
5794                                          -accesskey => "n", -title => "Alt-n"}, "next");
5795                         $paging_nav .= " &sdot; $next_link";
5796                 } else {
5797                         $paging_nav .= " &sdot; next";
5798                 }
5799
5800                 if ($#commitlist >= 100) {
5801                 }
5802
5803                 git_print_page_nav('','', $hash,$co{'tree'},$hash, $paging_nav);
5804                 git_print_header_div('commit', esc_html($co{'title'}), $hash);
5805                 git_search_grep_body(\@commitlist, 0, 99, $next_link);
5806         }
5807
5808         if ($searchtype eq 'pickaxe') {
5809                 git_print_page_nav('','', $hash,$co{'tree'},$hash);
5810                 git_print_header_div('commit', esc_html($co{'title'}), $hash);
5811
5812                 print "<table class=\"pickaxe search\">\n";
5813                 my $alternate = 1;
5814                 $/ = "\n";
5815                 open my $fd, '-|', git_cmd(), '--no-pager', 'log', @diff_opts,
5816                         '--pretty=format:%H', '--no-abbrev', '--raw', "-S$searchtext",
5817                         ($search_use_regexp ? '--pickaxe-regex' : ());
5818                 undef %co;
5819                 my @files;
5820                 while (my $line = <$fd>) {
5821                         chomp $line;
5822                         next unless $line;
5823
5824                         my %set = parse_difftree_raw_line($line);
5825                         if (defined $set{'commit'}) {
5826                                 # finish previous commit
5827                                 if (%co) {
5828                                         print "</td>\n" .
5829                                               "<td class=\"link\">" .
5830                                               $cgi->a({-href => href(action=>"commit", hash=>$co{'id'})}, "commit") .
5831                                               " | " .
5832                                               $cgi->a({-href => href(action=>"tree", hash=>$co{'tree'}, hash_base=>$co{'id'})}, "tree");
5833                                         print "</td>\n" .
5834                                               "</tr>\n";
5835                                 }
5836
5837                                 if ($alternate) {
5838                                         print "<tr class=\"dark\">\n";
5839                                 } else {
5840                                         print "<tr class=\"light\">\n";
5841                                 }
5842                                 $alternate ^= 1;
5843                                 %co = parse_commit($set{'commit'});
5844                                 my $author = chop_and_escape_str($co{'author_name'}, 15, 5);
5845                                 print "<td title=\"$co{'age_string_age'}\"><i>$co{'age_string_date'}</i></td>\n" .
5846                                       "<td><i>$author</i></td>\n" .
5847                                       "<td>" .
5848                                       $cgi->a({-href => href(action=>"commit", hash=>$co{'id'}),
5849                                               -class => "list subject"},
5850                                               chop_and_escape_str($co{'title'}, 50) . "<br/>");
5851                         } elsif (defined $set{'to_id'}) {
5852                                 next if ($set{'to_id'} =~ m/^0{40}$/);
5853
5854                                 print $cgi->a({-href => href(action=>"blob", hash_base=>$co{'id'},
5855                                                              hash=>$set{'to_id'}, file_name=>$set{'to_file'}),
5856                                               -class => "list"},
5857                                               "<span class=\"match\">" . esc_path($set{'file'}) . "</span>") .
5858                                       "<br/>\n";
5859                         }
5860                 }
5861                 close $fd;
5862
5863                 # finish last commit (warning: repetition!)
5864                 if (%co) {
5865                         print "</td>\n" .
5866                               "<td class=\"link\">" .
5867                               $cgi->a({-href => href(action=>"commit", hash=>$co{'id'})}, "commit") .
5868                               " | " .
5869                               $cgi->a({-href => href(action=>"tree", hash=>$co{'tree'}, hash_base=>$co{'id'})}, "tree");
5870                         print "</td>\n" .
5871                               "</tr>\n";
5872                 }
5873
5874                 print "</table>\n";
5875         }
5876
5877         if ($searchtype eq 'grep') {
5878                 git_print_page_nav('','', $hash,$co{'tree'},$hash);
5879                 git_print_header_div('commit', esc_html($co{'title'}), $hash);
5880
5881                 print "<table class=\"grep_search\">\n";
5882                 my $alternate = 1;
5883                 my $matches = 0;
5884                 $/ = "\n";
5885                 open my $fd, "-|", git_cmd(), 'grep', '-n',
5886                         $search_use_regexp ? ('-E', '-i') : '-F',
5887                         $searchtext, $co{'tree'};
5888                 my $lastfile = '';
5889                 while (my $line = <$fd>) {
5890                         chomp $line;
5891                         my ($file, $lno, $ltext, $binary);
5892                         last if ($matches++ > 1000);
5893                         if ($line =~ /^Binary file (.+) matches$/) {
5894                                 $file = $1;
5895                                 $binary = 1;
5896                         } else {
5897                                 (undef, $file, $lno, $ltext) = split(/:/, $line, 4);
5898                         }
5899                         if ($file ne $lastfile) {
5900                                 $lastfile and print "</td></tr>\n";
5901                                 if ($alternate++) {
5902                                         print "<tr class=\"dark\">\n";
5903                                 } else {
5904                                         print "<tr class=\"light\">\n";
5905                                 }
5906                                 print "<td class=\"list\">".
5907                                         $cgi->a({-href => href(action=>"blob", hash=>$co{'hash'},
5908                                                                file_name=>"$file"),
5909                                                 -class => "list"}, esc_path($file));
5910                                 print "</td><td>\n";
5911                                 $lastfile = $file;
5912                         }
5913                         if ($binary) {
5914                                 print "<div class=\"binary\">Binary file</div>\n";
5915                         } else {
5916                                 $ltext = untabify($ltext);
5917                                 if ($ltext =~ m/^(.*)($search_regexp)(.*)$/i) {
5918                                         $ltext = esc_html($1, -nbsp=>1);
5919                                         $ltext .= '<span class="match">';
5920                                         $ltext .= esc_html($2, -nbsp=>1);
5921                                         $ltext .= '</span>';
5922                                         $ltext .= esc_html($3, -nbsp=>1);
5923                                 } else {
5924                                         $ltext = esc_html($ltext, -nbsp=>1);
5925                                 }
5926                                 print "<div class=\"pre\">" .
5927                                         $cgi->a({-href => href(action=>"blob", hash=>$co{'hash'},
5928                                                                file_name=>"$file").'#l'.$lno,
5929                                                 -class => "linenr"}, sprintf('%4i', $lno))
5930                                         . ' ' .  $ltext . "</div>\n";
5931                         }
5932                 }
5933                 if ($lastfile) {
5934                         print "</td></tr>\n";
5935                         if ($matches > 1000) {
5936                                 print "<div class=\"diff nodifferences\">Too many matches, listing trimmed</div>\n";
5937                         }
5938                 } else {
5939                         print "<div class=\"diff nodifferences\">No matches found</div>\n";
5940                 }
5941                 close $fd;
5942
5943                 print "</table>\n";
5944         }
5945         git_footer_html();
5946 }
5947
5948 sub git_search_help {
5949         git_header_html();
5950         git_print_page_nav('','', $hash,$hash,$hash);
5951         print <<EOT;
5952 <p><strong>Pattern</strong> is by default a normal string that is matched precisely (but without
5953 regard to case, except in the case of pickaxe). However, when you check the <em>re</em> checkbox,
5954 the pattern entered is recognized as the POSIX extended
5955 <a href="http://en.wikipedia.org/wiki/Regular_expression">regular expression</a> (also case
5956 insensitive).</p>
5957 <dl>
5958 <dt><b>commit</b></dt>
5959 <dd>The commit messages and authorship information will be scanned for the given pattern.</dd>
5960 EOT
5961         my $have_grep = gitweb_check_feature('grep');
5962         if ($have_grep) {
5963                 print <<EOT;
5964 <dt><b>grep</b></dt>
5965 <dd>All files in the currently selected tree (HEAD unless you are explicitly browsing
5966     a different one) are searched for the given pattern. On large trees, this search can take
5967 a while and put some strain on the server, so please use it with some consideration. Note that
5968 due to git-grep peculiarity, currently if regexp mode is turned off, the matches are
5969 case-sensitive.</dd>
5970 EOT
5971         }
5972         print <<EOT;
5973 <dt><b>author</b></dt>
5974 <dd>Name and e-mail of the change author and date of birth of the patch will be scanned for the given pattern.</dd>
5975 <dt><b>committer</b></dt>
5976 <dd>Name and e-mail of the committer and date of commit will be scanned for the given pattern.</dd>
5977 EOT
5978         my $have_pickaxe = gitweb_check_feature('pickaxe');
5979         if ($have_pickaxe) {
5980                 print <<EOT;
5981 <dt><b>pickaxe</b></dt>
5982 <dd>All commits that caused the string to appear or disappear from any file (changes that
5983 added, removed or "modified" the string) will be listed. This search can take a while and
5984 takes a lot of strain on the server, so please use it wisely. Note that since you may be
5985 interested even in changes just changing the case as well, this search is case sensitive.</dd>
5986 EOT
5987         }
5988         print "</dl>\n";
5989         git_footer_html();
5990 }
5991
5992 sub git_shortlog {
5993         my $head = git_get_head_hash($project);
5994         if (!defined $hash) {
5995                 $hash = $head;
5996         }
5997         if (!defined $page) {
5998                 $page = 0;
5999         }
6000         my $refs = git_get_references();
6001
6002         my $commit_hash = $hash;
6003         if (defined $hash_parent) {
6004                 $commit_hash = "$hash_parent..$hash";
6005         }
6006         my @commitlist = parse_commits($commit_hash, 101, (100 * $page));
6007
6008         my $paging_nav = format_paging_nav('shortlog', $hash, $head, $page, $#commitlist >= 100);
6009         my $next_link = '';
6010         if ($#commitlist >= 100) {
6011                 $next_link =
6012                         $cgi->a({-href => href(-replay=>1, page=>$page+1),
6013                                  -accesskey => "n", -title => "Alt-n"}, "next");
6014         }
6015         my $patch_max = gitweb_check_feature('patches');
6016         if ($patch_max) {
6017                 if ($patch_max < 0 || @commitlist <= $patch_max) {
6018                         $paging_nav .= " &sdot; " .
6019                                 $cgi->a({-href => href(action=>"patches", -replay=>1)},
6020                                         "patches");
6021                 }
6022         }
6023
6024         git_header_html();
6025         git_print_page_nav('shortlog','', $hash,$hash,$hash, $paging_nav);
6026         git_print_header_div('summary', $project);
6027
6028         git_shortlog_body(\@commitlist, 0, 99, $refs, $next_link);
6029
6030         git_footer_html();
6031 }
6032
6033 ## ......................................................................
6034 ## feeds (RSS, Atom; OPML)
6035
6036 sub git_feed {
6037         my $format = shift || 'atom';
6038         my $have_blame = gitweb_check_feature('blame');
6039
6040         # Atom: http://www.atomenabled.org/developers/syndication/
6041         # RSS:  http://www.notestips.com/80256B3A007F2692/1/NAMO5P9UPQ
6042         if ($format ne 'rss' && $format ne 'atom') {
6043                 die_error(400, "Unknown web feed format");
6044         }
6045
6046         # log/feed of current (HEAD) branch, log of given branch, history of file/directory
6047         my $head = $hash || 'HEAD';
6048         my @commitlist = parse_commits($head, 150, 0, $file_name);
6049
6050         my %latest_commit;
6051         my %latest_date;
6052         my $content_type = "application/$format+xml";
6053         if (defined $cgi->http('HTTP_ACCEPT') &&
6054                  $cgi->Accept('text/xml') > $cgi->Accept($content_type)) {
6055                 # browser (feed reader) prefers text/xml
6056                 $content_type = 'text/xml';
6057         }
6058         if (defined($commitlist[0])) {
6059                 %latest_commit = %{$commitlist[0]};
6060                 my $latest_epoch = $latest_commit{'committer_epoch'};
6061                 %latest_date   = parse_date($latest_epoch);
6062                 my $if_modified = $cgi->http('IF_MODIFIED_SINCE');
6063                 if (defined $if_modified) {
6064                         my $since;
6065                         if (eval { require HTTP::Date; 1; }) {
6066                                 $since = HTTP::Date::str2time($if_modified);
6067                         } elsif (eval { require Time::ParseDate; 1; }) {
6068                                 $since = Time::ParseDate::parsedate($if_modified, GMT => 1);
6069                         }
6070                         if (defined $since && $latest_epoch <= $since) {
6071                                 print $cgi->header(
6072                                         -type => $content_type,
6073                                         -charset => 'utf-8',
6074                                         -last_modified => $latest_date{'rfc2822'},
6075                                         -status => '304 Not Modified');
6076                                 return;
6077                         }
6078                 }
6079                 print $cgi->header(
6080                         -type => $content_type,
6081                         -charset => 'utf-8',
6082                         -last_modified => $latest_date{'rfc2822'});
6083         } else {
6084                 print $cgi->header(
6085                         -type => $content_type,
6086                         -charset => 'utf-8');
6087         }
6088
6089         # Optimization: skip generating the body if client asks only
6090         # for Last-Modified date.
6091         return if ($cgi->request_method() eq 'HEAD');
6092
6093         # header variables
6094         my $title = "$site_name - $project/$action";
6095         my $feed_type = 'log';
6096         if (defined $hash) {
6097                 $title .= " - '$hash'";
6098                 $feed_type = 'branch log';
6099                 if (defined $file_name) {
6100                         $title .= " :: $file_name";
6101                         $feed_type = 'history';
6102                 }
6103         } elsif (defined $file_name) {
6104                 $title .= " - $file_name";
6105                 $feed_type = 'history';
6106         }
6107         $title .= " $feed_type";
6108         my $descr = git_get_project_description($project);
6109         if (defined $descr) {
6110                 $descr = esc_html($descr);
6111         } else {
6112                 $descr = "$project " .
6113                          ($format eq 'rss' ? 'RSS' : 'Atom') .
6114                          " feed";
6115         }
6116         my $owner = git_get_project_owner($project);
6117         $owner = esc_html($owner);
6118
6119         #header
6120         my $alt_url;
6121         if (defined $file_name) {
6122                 $alt_url = href(-full=>1, action=>"history", hash=>$hash, file_name=>$file_name);
6123         } elsif (defined $hash) {
6124                 $alt_url = href(-full=>1, action=>"log", hash=>$hash);
6125         } else {
6126                 $alt_url = href(-full=>1, action=>"summary");
6127         }
6128         print qq!<?xml version="1.0" encoding="utf-8"?>\n!;
6129         if ($format eq 'rss') {
6130                 print <<XML;
6131 <rss version="2.0" xmlns:content="http://purl.org/rss/1.0/modules/content/">
6132 <channel>
6133 XML
6134                 print "<title>$title</title>\n" .
6135                       "<link>$alt_url</link>\n" .
6136                       "<description>$descr</description>\n" .
6137                       "<language>en</language>\n" .
6138                       # project owner is responsible for 'editorial' content
6139                       "<managingEditor>$owner</managingEditor>\n";
6140                 if (defined $logo || defined $favicon) {
6141                         # prefer the logo to the favicon, since RSS
6142                         # doesn't allow both
6143                         my $img = esc_url($logo || $favicon);
6144                         print "<image>\n" .
6145                               "<url>$img</url>\n" .
6146                               "<title>$title</title>\n" .
6147                               "<link>$alt_url</link>\n" .
6148                               "</image>\n";
6149                 }
6150                 if (%latest_date) {
6151                         print "<pubDate>$latest_date{'rfc2822'}</pubDate>\n";
6152                         print "<lastBuildDate>$latest_date{'rfc2822'}</lastBuildDate>\n";
6153                 }
6154                 print "<generator>gitweb v.$version/$git_version</generator>\n";
6155         } elsif ($format eq 'atom') {
6156                 print <<XML;
6157 <feed xmlns="http://www.w3.org/2005/Atom">
6158 XML
6159                 print "<title>$title</title>\n" .
6160                       "<subtitle>$descr</subtitle>\n" .
6161                       '<link rel="alternate" type="text/html" href="' .
6162                       $alt_url . '" />' . "\n" .
6163                       '<link rel="self" type="' . $content_type . '" href="' .
6164                       $cgi->self_url() . '" />' . "\n" .
6165                       "<id>" . href(-full=>1) . "</id>\n" .
6166                       # use project owner for feed author
6167                       "<author><name>$owner</name></author>\n";
6168                 if (defined $favicon) {
6169                         print "<icon>" . esc_url($favicon) . "</icon>\n";
6170                 }
6171                 if (defined $logo_url) {
6172                         # not twice as wide as tall: 72 x 27 pixels
6173                         print "<logo>" . esc_url($logo) . "</logo>\n";
6174                 }
6175                 if (! %latest_date) {
6176                         # dummy date to keep the feed valid until commits trickle in:
6177                         print "<updated>1970-01-01T00:00:00Z</updated>\n";
6178                 } else {
6179                         print "<updated>$latest_date{'iso-8601'}</updated>\n";
6180                 }
6181                 print "<generator version='$version/$git_version'>gitweb</generator>\n";
6182         }
6183
6184         # contents
6185         for (my $i = 0; $i <= $#commitlist; $i++) {
6186                 my %co = %{$commitlist[$i]};
6187                 my $commit = $co{'id'};
6188                 # we read 150, we always show 30 and the ones more recent than 48 hours
6189                 if (($i >= 20) && ((time - $co{'author_epoch'}) > 48*60*60)) {
6190                         last;
6191                 }
6192                 my %cd = parse_date($co{'author_epoch'});
6193
6194                 # get list of changed files
6195                 open my $fd, "-|", git_cmd(), "diff-tree", '-r', @diff_opts,
6196                         $co{'parent'} || "--root",
6197                         $co{'id'}, "--", (defined $file_name ? $file_name : ())
6198                         or next;
6199                 my @difftree = map { chomp; $_ } <$fd>;
6200                 close $fd
6201                         or next;
6202
6203                 # print element (entry, item)
6204                 my $co_url = href(-full=>1, action=>"commitdiff", hash=>$commit);
6205                 if ($format eq 'rss') {
6206                         print "<item>\n" .
6207                               "<title>" . esc_html($co{'title'}) . "</title>\n" .
6208                               "<author>" . esc_html($co{'author'}) . "</author>\n" .
6209                               "<pubDate>$cd{'rfc2822'}</pubDate>\n" .
6210                               "<guid isPermaLink=\"true\">$co_url</guid>\n" .
6211                               "<link>$co_url</link>\n" .
6212                               "<description>" . esc_html($co{'title'}) . "</description>\n" .
6213                               "<content:encoded>" .
6214                               "<![CDATA[\n";
6215                 } elsif ($format eq 'atom') {
6216                         print "<entry>\n" .
6217                               "<title type=\"html\">" . esc_html($co{'title'}) . "</title>\n" .
6218                               "<updated>$cd{'iso-8601'}</updated>\n" .
6219                               "<author>\n" .
6220                               "  <name>" . esc_html($co{'author_name'}) . "</name>\n";
6221                         if ($co{'author_email'}) {
6222                                 print "  <email>" . esc_html($co{'author_email'}) . "</email>\n";
6223                         }
6224                         print "</author>\n" .
6225                               # use committer for contributor
6226                               "<contributor>\n" .
6227                               "  <name>" . esc_html($co{'committer_name'}) . "</name>\n";
6228                         if ($co{'committer_email'}) {
6229                                 print "  <email>" . esc_html($co{'committer_email'}) . "</email>\n";
6230                         }
6231                         print "</contributor>\n" .
6232                               "<published>$cd{'iso-8601'}</published>\n" .
6233                               "<link rel=\"alternate\" type=\"text/html\" href=\"$co_url\" />\n" .
6234                               "<id>$co_url</id>\n" .
6235                               "<content type=\"xhtml\" xml:base=\"" . esc_url($my_url) . "\">\n" .
6236                               "<div xmlns=\"http://www.w3.org/1999/xhtml\">\n";
6237                 }
6238                 my $comment = $co{'comment'};
6239                 print "<pre>\n";
6240                 foreach my $line (@$comment) {
6241                         $line = esc_html($line);
6242                         print "$line\n";
6243                 }
6244                 print "</pre><ul>\n";
6245                 foreach my $difftree_line (@difftree) {
6246                         my %difftree = parse_difftree_raw_line($difftree_line);
6247                         next if !$difftree{'from_id'};
6248
6249                         my $file = $difftree{'file'} || $difftree{'to_file'};
6250
6251                         print "<li>" .
6252                               "[" .
6253                               $cgi->a({-href => href(-full=>1, action=>"blobdiff",
6254                                                      hash=>$difftree{'to_id'}, hash_parent=>$difftree{'from_id'},
6255                                                      hash_base=>$co{'id'}, hash_parent_base=>$co{'parent'},
6256                                                      file_name=>$file, file_parent=>$difftree{'from_file'}),
6257                                       -title => "diff"}, 'D');
6258                         if ($have_blame) {
6259                                 print $cgi->a({-href => href(-full=>1, action=>"blame",
6260                                                              file_name=>$file, hash_base=>$commit),
6261                                               -title => "blame"}, 'B');
6262                         }
6263                         # if this is not a feed of a file history
6264                         if (!defined $file_name || $file_name ne $file) {
6265                                 print $cgi->a({-href => href(-full=>1, action=>"history",
6266                                                              file_name=>$file, hash=>$commit),
6267                                               -title => "history"}, 'H');
6268                         }
6269                         $file = esc_path($file);
6270                         print "] ".
6271                               "$file</li>\n";
6272                 }
6273                 if ($format eq 'rss') {
6274                         print "</ul>]]>\n" .
6275                               "</content:encoded>\n" .
6276                               "</item>\n";
6277                 } elsif ($format eq 'atom') {
6278                         print "</ul>\n</div>\n" .
6279                               "</content>\n" .
6280                               "</entry>\n";
6281                 }
6282         }
6283
6284         # end of feed
6285         if ($format eq 'rss') {
6286                 print "</channel>\n</rss>\n";
6287         }       elsif ($format eq 'atom') {
6288                 print "</feed>\n";
6289         }
6290 }
6291
6292 sub git_rss {
6293         git_feed('rss');
6294 }
6295
6296 sub git_atom {
6297         git_feed('atom');
6298 }
6299
6300 sub git_opml {
6301         my @list = git_get_projects_list();
6302
6303         print $cgi->header(
6304                 -type => 'text/xml',
6305                 -charset => 'utf-8',
6306                 -content_disposition => 'inline; filename="opml.xml"');
6307
6308         print <<XML;
6309 <?xml version="1.0" encoding="utf-8"?>
6310 <opml version="1.0">
6311 <head>
6312   <title>$site_name OPML Export</title>
6313 </head>
6314 <body>
6315 <outline text="git RSS feeds">
6316 XML
6317
6318         foreach my $pr (@list) {
6319                 my %proj = %$pr;
6320                 my $head = git_get_head_hash($proj{'path'});
6321                 if (!defined $head) {
6322                         next;
6323                 }
6324                 $git_dir = "$projectroot/$proj{'path'}";
6325                 my %co = parse_commit($head);
6326                 if (!%co) {
6327                         next;
6328                 }
6329
6330                 my $path = esc_html(chop_str($proj{'path'}, 25, 5));
6331                 my $rss  = href('project' => $proj{'path'}, 'action' => 'rss', -full => 1);
6332                 my $html = href('project' => $proj{'path'}, 'action' => 'summary', -full => 1);
6333                 print "<outline type=\"rss\" text=\"$path\" title=\"$path\" xmlUrl=\"$rss\" htmlUrl=\"$html\"/>\n";
6334         }
6335         print <<XML;
6336 </outline>
6337 </body>
6338 </opml>
6339 XML
6340 }