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 # if we're called with PATH_INFO, we have to strip that
  31 # from the URL to find our real URL
  32 # we make $path_info global because it's also used later on
  33 my $path_info = $ENV{"PATH_INFO"};
  34 if ($path_info) {
  35         $my_url =~ s,\Q$path_info\E$,,;
  36         $my_uri =~ s,\Q$path_info\E$,,;
  37 }
  38
  39 # core git executable to use
  40 # this can just be "git" if your webserver has a sensible PATH
  41 our $GIT = "++GIT_BINDIR++/git";
  42
  43 # absolute fs-path which will be prepended to the project path
  44 #our $projectroot = "/pub/scm";
  45 our $projectroot = "++GITWEB_PROJECTROOT++";
  46
  47 # fs traversing limit for getting project list
  48 # the number is relative to the projectroot
  49 our $project_maxdepth = "++GITWEB_PROJECT_MAXDEPTH++";
  50
  51 # target of the home link on top of all pages
  52 our $home_link = $my_uri || "/";
  53
  54 # string of the home link on top of all pages
  55 our $home_link_str = "++GITWEB_HOME_LINK_STR++";
  56
  57 # name of your site or organization to appear in page titles
  58 # replace this with something more descriptive for clearer bookmarks
  59 our $site_name = "++GITWEB_SITENAME++"
  60                  || ($ENV{'SERVER_NAME'} || "Untitled") . " Git";
  61
  62 # filename of html text to include at top of each page
  63 our $site_header = "++GITWEB_SITE_HEADER++";
  64 # html text to include at home page
  65 our $home_text = "++GITWEB_HOMETEXT++";
  66 # filename of html text to include at bottom of each page
  67 our $site_footer = "++GITWEB_SITE_FOOTER++";
  68
  69 # URI of stylesheets
  70 our @stylesheets = ("++GITWEB_CSS++");
  71 # URI of a single stylesheet, which can be overridden in GITWEB_CONFIG.
  72 our $stylesheet = undef;
  73 # URI of GIT logo (72x27 size)
  74 our $logo = "++GITWEB_LOGO++";
  75 # URI of GIT favicon, assumed to be image/png type
  76 our $favicon = "++GITWEB_FAVICON++";
  77
  78 # URI and label (title) of GIT logo link
  79 #our $logo_url = "http://www.kernel.org/pub/software/scm/git/docs/";
  80 #our $logo_label = "git documentation";
  81 our $logo_url = "http://git.or.cz/";
  82 our $logo_label = "git homepage";
  83
  84 # source of projects list
  85 our $projects_list = "++GITWEB_LIST++";
  86
  87 # the width (in characters) of the projects list "Description" column
  88 our $projects_list_description_width = 25;
  89
  90 # default order of projects list
  91 # valid values are none, project, descr, owner, and age
  92 our $default_projects_order = "project";
  93
  94 # show repository only if this file exists
  95 # (only effective if this variable evaluates to true)
  96 our $export_ok = "++GITWEB_EXPORT_OK++";
  97
  98 # only allow viewing of repositories also shown on the overview page
  99 our $strict_export = "++GITWEB_STRICT_EXPORT++";
 100
 101 # list of git base URLs used for URL to where fetch project from,
 102 # i.e. full URL is "$git_base_url/$project"
 103 our @git_base_url_list = grep { $_ ne '' } ("++GITWEB_BASE_URL++");
 104
 105 # default blob_plain mimetype and default charset for text/plain blob
 106 our $default_blob_plain_mimetype = 'text/plain';
 107 our $default_text_plain_charset  = undef;
 108
 109 # file to use for guessing MIME types before trying /etc/mime.types
 110 # (relative to the current git repository)
 111 our $mimetypes_file = undef;
 112
 113 # assume this charset if line contains non-UTF-8 characters;
 114 # it should be valid encoding (see Encoding::Supported(3pm) for list),
 115 # for which encoding all byte sequences are valid, for example
 116 # 'iso-8859-1' aka 'latin1' (it is decoded without checking, so it
 117 # could be even 'utf-8' for the old behavior)
 118 our $fallback_encoding = 'latin1';
 119
 120 # rename detection options for git-diff and git-diff-tree
 121 # - default is '-M', with the cost proportional to
 122 #   (number of removed files) * (number of new files).
 123 # - more costly is '-C' (which implies '-M'), with the cost proportional to
 124 #   (number of changed files + number of removed files) * (number of new files)
 125 # - even more costly is '-C', '--find-copies-harder' with cost
 126 #   (number of files in the original tree) * (number of new files)
 127 # - one might want to include '-B' option, e.g. '-B', '-M'
 128 our @diff_opts = ('-M'); # taken from git_commit
 129
 130 # information about snapshot formats that gitweb is capable of serving
 131 our %known_snapshot_formats = (
 132         # name => {
 133         #       'display' => display name,
 134         #       'type' => mime type,
 135         #       'suffix' => filename suffix,
 136         #       'format' => --format for git-archive,
 137         #       'compressor' => [compressor command and arguments]
 138         #                       (array reference, optional)}
 139         #
 140         'tgz' => {
 141                 'display' => 'tar.gz',
 142                 'type' => 'application/x-gzip',
 143                 'suffix' => '.tar.gz',
 144                 'format' => 'tar',
 145                 'compressor' => ['gzip']},
 146
 147         'tbz2' => {
 148                 'display' => 'tar.bz2',
 149                 'type' => 'application/x-bzip2',
 150                 'suffix' => '.tar.bz2',
 151                 'format' => 'tar',
 152                 'compressor' => ['bzip2']},
 153
 154         'zip' => {
 155                 'display' => 'zip',
 156                 'type' => 'application/x-zip',
 157                 'suffix' => '.zip',
 158                 'format' => 'zip'},
 159 );
 160
 161 # Aliases so we understand old gitweb.snapshot values in repository
 162 # configuration.
 163 our %known_snapshot_format_aliases = (
 164         'gzip'  => 'tgz',
 165         'bzip2' => 'tbz2',
 166
 167         # backward compatibility: legacy gitweb config support
 168         'x-gzip' => undef, 'gz' => undef,
 169         'x-bzip2' => undef, 'bz2' => undef,
 170         'x-zip' => undef, '' => undef,
 171 );
 172
 173 # You define site-wide feature defaults here; override them with
 174 # $GITWEB_CONFIG as necessary.
 175 our %feature = (
 176         # feature => {
 177         #       'sub' => feature-sub (subroutine),
 178         #       'override' => allow-override (boolean),
 179         #       'default' => [ default options...] (array reference)}
 180         #
 181         # if feature is overridable (it means that allow-override has true value),
 182         # then feature-sub will be called with default options as parameters;
 183         # return value of feature-sub indicates if to enable specified feature
 184         #
 185         # if there is no 'sub' key (no feature-sub), then feature cannot be
 186         # overriden
 187         #
 188         # use gitweb_check_feature(<feature>) to check if <feature> is enabled
 189
 190         # Enable the 'blame' blob view, showing the last commit that modified
 191         # each line in the file. This can be very CPU-intensive.
 192
 193         # To enable system wide have in $GITWEB_CONFIG
 194         # $feature{'blame'}{'default'} = [1];
 195         # To have project specific config enable override in $GITWEB_CONFIG
 196         # $feature{'blame'}{'override'} = 1;
 197         # and in project config gitweb.blame = 0|1;
 198         'blame' => {
 199                 'sub' => \&feature_blame,
 200                 'override' => 0,
 201                 'default' => [0]},
 202
 203         # Enable the 'snapshot' link, providing a compressed archive of any
 204         # tree. This can potentially generate high traffic if you have large
 205         # project.
 206
 207         # Value is a list of formats defined in %known_snapshot_formats that
 208         # you wish to offer.
 209         # To disable system wide have in $GITWEB_CONFIG
 210         # $feature{'snapshot'}{'default'} = [];
 211         # To have project specific config enable override in $GITWEB_CONFIG
 212         # $feature{'snapshot'}{'override'} = 1;
 213         # and in project config, a comma-separated list of formats or "none"
 214         # to disable.  Example: gitweb.snapshot = tbz2,zip;
 215         'snapshot' => {
 216                 'sub' => \&feature_snapshot,
 217                 'override' => 0,
 218                 'default' => ['tgz']},
 219
 220         # Enable text search, which will list the commits which match author,
 221         # committer or commit text to a given string.  Enabled by default.
 222         # Project specific override is not supported.
 223         'search' => {
 224                 'override' => 0,
 225                 'default' => [1]},
 226
 227         # Enable grep search, which will list the files in currently selected
 228         # tree containing the given string. Enabled by default. This can be
 229         # potentially CPU-intensive, of course.
 230
 231         # To enable system wide have in $GITWEB_CONFIG
 232         # $feature{'grep'}{'default'} = [1];
 233         # To have project specific config enable override in $GITWEB_CONFIG
 234         # $feature{'grep'}{'override'} = 1;
 235         # and in project config gitweb.grep = 0|1;
 236         'grep' => {
 237                 'override' => 0,
 238                 'default' => [1]},
 239
 240         # Enable the pickaxe search, which will list the commits that modified
 241         # a given string in a file. This can be practical and quite faster
 242         # alternative to 'blame', but still potentially CPU-intensive.
 243
 244         # To enable system wide have in $GITWEB_CONFIG
 245         # $feature{'pickaxe'}{'default'} = [1];
 246         # To have project specific config enable override in $GITWEB_CONFIG
 247         # $feature{'pickaxe'}{'override'} = 1;
 248         # and in project config gitweb.pickaxe = 0|1;
 249         'pickaxe' => {
 250                 'sub' => \&feature_pickaxe,
 251                 'override' => 0,
 252                 'default' => [1]},
 253
 254         # Make gitweb use an alternative format of the URLs which can be
 255         # more readable and natural-looking: project name is embedded
 256         # directly in the path and the query string contains other
 257         # auxiliary information. All gitweb installations recognize
 258         # URL in either format; this configures in which formats gitweb
 259         # generates links.
 260
 261         # To enable system wide have in $GITWEB_CONFIG
 262         # $feature{'pathinfo'}{'default'} = [1];
 263         # Project specific override is not supported.
 264
 265         # Note that you will need to change the default location of CSS,
 266         # favicon, logo and possibly other files to an absolute URL. Also,
 267         # if gitweb.cgi serves as your indexfile, you will need to force
 268         # $my_uri to contain the script name in your $GITWEB_CONFIG.
 269         'pathinfo' => {
 270                 'override' => 0,
 271                 'default' => [0]},
 272
 273         # Make gitweb consider projects in project root subdirectories
 274         # to be forks of existing projects. Given project $projname.git,
 275         # projects matching $projname/*.git will not be shown in the main
 276         # projects list, instead a '+' mark will be added to $projname
 277         # there and a 'forks' view will be enabled for the project, listing
 278         # all the forks. If project list is taken from a file, forks have
 279         # to be listed after the main project.
 280
 281         # To enable system wide have in $GITWEB_CONFIG
 282         # $feature{'forks'}{'default'} = [1];
 283         # Project specific override is not supported.
 284         'forks' => {
 285                 'override' => 0,
 286                 'default' => [0]},
 287
 288         # Insert custom links to the action bar of all project pages.
 289         # This enables you mainly to link to third-party scripts integrating
 290         # into gitweb; e.g. git-browser for graphical history representation
 291         # or custom web-based repository administration interface.
 292
 293         # The 'default' value consists of a list of triplets in the form
 294         # (label, link, position) where position is the label after which
 295         # to inster the link and link is a format string where %n expands
 296         # to the project name, %f to the project path within the filesystem,
 297         # %h to the current hash (h gitweb parameter) and %b to the current
 298         # hash base (hb gitweb parameter).
 299
 300         # To enable system wide have in $GITWEB_CONFIG e.g.
 301         # $feature{'actions'}{'default'} = [('graphiclog',
 302         #       '/git-browser/by-commit.html?r=%n', 'summary')];
 303         # Project specific override is not supported.
 304         'actions' => {
 305                 'override' => 0,
 306                 'default' => []},
 307
 308         # Allow gitweb scan project content tags described in ctags/
 309         # of project repository, and display the popular Web 2.0-ish
 310         # "tag cloud" near the project list. Note that this is something
 311         # COMPLETELY different from the normal Git tags.
 312
 313         # gitweb by itself can show existing tags, but it does not handle
 314         # tagging itself; you need an external application for that.
 315         # For an example script, check Girocco's cgi/tagproj.cgi.
 316         # You may want to install the HTML::TagCloud Perl module to get
 317         # a pretty tag cloud instead of just a list of tags.
 318
 319         # To enable system wide have in $GITWEB_CONFIG
 320         # $feature{'ctags'}{'default'} = ['path_to_tag_script'];
 321         # Project specific override is not supported.
 322         'ctags' => {
 323                 'override' => 0,
 324                 'default' => [0]},
 325 );
 326
 327 sub gitweb_check_feature {
 328         my ($name) = @_;
 329         return unless exists $feature{$name};
 330         my ($sub, $override, @defaults) = (
 331                 $feature{$name}{'sub'},
 332                 $feature{$name}{'override'},
 333                 @{$feature{$name}{'default'}});
 334         if (!$override) { return @defaults; }
 335         if (!defined $sub) {
 336                 warn "feature $name is not overrideable";
 337                 return @defaults;
 338         }
 339         return $sub->(@defaults);
 340 }
 341
 342 sub feature_blame {
 343         my ($val) = git_get_project_config('blame', '--bool');
 344
 345         if ($val eq 'true') {
 346                 return 1;
 347         } elsif ($val eq 'false') {
 348                 return 0;
 349         }
 350
 351         return $_[0];
 352 }
 353
 354 sub feature_snapshot {
 355         my (@fmts) = @_;
 356
 357         my ($val) = git_get_project_config('snapshot');
 358
 359         if ($val) {
 360                 @fmts = ($val eq 'none' ? () : split /\s*[,\s]\s*/, $val);
 361         }
 362
 363         return @fmts;
 364 }
 365
 366 sub feature_grep {
 367         my ($val) = git_get_project_config('grep', '--bool');
 368
 369         if ($val eq 'true') {
 370                 return (1);
 371         } elsif ($val eq 'false') {
 372                 return (0);
 373         }
 374
 375         return ($_[0]);
 376 }
 377
 378 sub feature_pickaxe {
 379         my ($val) = git_get_project_config('pickaxe', '--bool');
 380
 381         if ($val eq 'true') {
 382                 return (1);
 383         } elsif ($val eq 'false') {
 384                 return (0);
 385         }
 386
 387         return ($_[0]);
 388 }
 389
 390 # checking HEAD file with -e is fragile if the repository was
 391 # initialized long time ago (i.e. symlink HEAD) and was pack-ref'ed
 392 # and then pruned.
 393 sub check_head_link {
 394         my ($dir) = @_;
 395         my $headfile = "$dir/HEAD";
 396         return ((-e $headfile) ||
 397                 (-l $headfile && readlink($headfile) =~ /^refs\/heads\//));
 398 }
 399
 400 sub check_export_ok {
 401         my ($dir) = @_;
 402         return (check_head_link($dir) &&
 403                 (!$export_ok || -e "$dir/$export_ok"));
 404 }
 405
 406 # process alternate names for backward compatibility
 407 # filter out unsupported (unknown) snapshot formats
 408 sub filter_snapshot_fmts {
 409         my @fmts = @_;
 410
 411         @fmts = map {
 412                 exists $known_snapshot_format_aliases{$_} ?
 413                        $known_snapshot_format_aliases{$_} : $_} @fmts;
 414         @fmts = grep(exists $known_snapshot_formats{$_}, @fmts);
 415
 416 }
 417
 418 our $GITWEB_CONFIG = $ENV{'GITWEB_CONFIG'} || "++GITWEB_CONFIG++";
 419 if (-e $GITWEB_CONFIG) {
 420         do $GITWEB_CONFIG;
 421 } else {
 422         our $GITWEB_CONFIG_SYSTEM = $ENV{'GITWEB_CONFIG_SYSTEM'} || "++GITWEB_CONFIG_SYSTEM++";
 423         do $GITWEB_CONFIG_SYSTEM if -e $GITWEB_CONFIG_SYSTEM;
 424 }
 425
 426 # version of the core git binary
 427 our $git_version = qx("$GIT" --version) =~ m/git version (.*)$/ ? $1 : "unknown";
 428
 429 $projects_list ||= $projectroot;
 430
 431 # ======================================================================
 432 # input validation and dispatch
 433
 434 # input parameters can be collected from a variety of sources (presently, CGI
 435 # and PATH_INFO), so we define an %input_params hash that collects them all
 436 # together during validation: this allows subsequent uses (e.g. href()) to be
 437 # agnostic of the parameter origin
 438
 439 my %input_params = ();
 440
 441 # input parameters are stored with the long parameter name as key. This will
 442 # also be used in the href subroutine to convert parameters to their CGI
 443 # equivalent, and since the href() usage is the most frequent one, we store
 444 # the name -> CGI key mapping here, instead of the reverse.
 445 #
 446 # XXX: Warning: If you touch this, check the search form for updating,
 447 # too.
 448
 449 my @cgi_param_mapping = (
 450         project => "p",
 451         action => "a",
 452         file_name => "f",
 453         file_parent => "fp",
 454         hash => "h",
 455         hash_parent => "hp",
 456         hash_base => "hb",
 457         hash_parent_base => "hpb",
 458         page => "pg",
 459         order => "o",
 460         searchtext => "s",
 461         searchtype => "st",
 462         snapshot_format => "sf",
 463         extra_options => "opt",
 464         search_use_regexp => "sr",
 465 );
 466 my %cgi_param_mapping = @cgi_param_mapping;
 467
 468 # we will also need to know the possible actions, for validation
 469 my %actions = (
 470         "blame" => \&git_blame,
 471         "blobdiff" => \&git_blobdiff,
 472         "blobdiff_plain" => \&git_blobdiff_plain,
 473         "blob" => \&git_blob,
 474         "blob_plain" => \&git_blob_plain,
 475         "commitdiff" => \&git_commitdiff,
 476         "commitdiff_plain" => \&git_commitdiff_plain,
 477         "commit" => \&git_commit,
 478         "forks" => \&git_forks,
 479         "heads" => \&git_heads,
 480         "history" => \&git_history,
 481         "log" => \&git_log,
 482         "rss" => \&git_rss,
 483         "atom" => \&git_atom,
 484         "search" => \&git_search,
 485         "search_help" => \&git_search_help,
 486         "shortlog" => \&git_shortlog,
 487         "summary" => \&git_summary,
 488         "tag" => \&git_tag,
 489         "tags" => \&git_tags,
 490         "tree" => \&git_tree,
 491         "snapshot" => \&git_snapshot,
 492         "object" => \&git_object,
 493         # those below don't need $project
 494         "opml" => \&git_opml,
 495         "project_list" => \&git_project_list,
 496         "project_index" => \&git_project_index,
 497 );
 498
 499 # finally, we have the hash of allowed extra_options for the commands that
 500 # allow them
 501 my %allowed_options = (
 502         "--no-merges" => [ qw(rss atom log shortlog history) ],
 503 );
 504
 505 # fill %input_params with the CGI parameters. All values except for 'opt'
 506 # should be single values, but opt can be an array. We should probably
 507 # build an array of parameters that can be multi-valued, but since for the time
 508 # being it's only this one, we just single it out
 509 while (my ($name, $symbol) = each %cgi_param_mapping) {
 510         if ($symbol eq 'opt') {
 511                 $input_params{$name} = [ $cgi->param($symbol) ];
 512         } else {
 513                 $input_params{$name} = $cgi->param($symbol);
 514         }
 515 }
 516
 517 # now read PATH_INFO and update the parameter list for missing parameters
 518 sub evaluate_path_info {
 519         return if defined $input_params{'project'};
 520         return if !$path_info;
 521         $path_info =~ s,^/+,,;
 522         return if !$path_info;
 523
 524         # find which part of PATH_INFO is project
 525         my $project = $path_info;
 526         $project =~ s,/+$,,;
 527         while ($project && !check_head_link("$projectroot/$project")) {
 528                 $project =~ s,/*[^/]*$,,;
 529         }
 530         return unless $project;
 531         $input_params{'project'} = $project;
 532
 533         # do not change any parameters if an action is given using the query string
 534         return if $input_params{'action'};
 535         $path_info =~ s,^\Q$project\E/*,,;
 536
 537         # next, check if we have an action
 538         my $action = $path_info;
 539         $action =~ s,/.*$,,;
 540         if (exists $actions{$action}) {
 541                 $path_info =~ s,^$action/*,,;
 542                 $input_params{'action'} = $action;
 543         }
 544
 545         # list of actions that want hash_base instead of hash, but can have no
 546         # pathname (f) parameter
 547         my @wants_base = (
 548                 'tree',
 549                 'history',
 550         );
 551
 552         # we want to catch
 553         # [$hash_parent_base[:$file_parent]..]$hash_parent[:$file_name]
 554         my ($parentrefname, $parentpathname, $refname, $pathname) =
 555                 ($path_info =~ /^(?:(.+?)(?::(.+))?\.\.)?(.+?)(?::(.+))?$/);
 556
 557         # first, analyze the 'current' part
 558         if (defined $pathname) {
 559                 # we got "branch:filename" or "branch:dir/"
 560                 # we could use git_get_type(branch:pathname), but:
 561                 # - it needs $git_dir
 562                 # - it does a git() call
 563                 # - the convention of terminating directories with a slash
 564                 #   makes it superfluous
 565                 # - embedding the action in the PATH_INFO would make it even
 566                 #   more superfluous
 567                 $pathname =~ s,^/+,,;
 568                 if (!$pathname || substr($pathname, -1) eq "/") {
 569                         $input_params{'action'} ||= "tree";
 570                         $pathname =~ s,/$,,;
 571                 } else {
 572                         # the default action depends on whether we had parent info
 573                         # or not
 574                         if ($parentrefname) {
 575                                 $input_params{'action'} ||= "blobdiff_plain";
 576                         } else {
 577                                 $input_params{'action'} ||= "blob_plain";
 578                         }
 579                 }
 580                 $input_params{'hash_base'} ||= $refname;
 581                 $input_params{'file_name'} ||= $pathname;
 582         } elsif (defined $refname) {
 583                 # we got "branch". In this case we have to choose if we have to
 584                 # set hash or hash_base.
 585                 #
 586                 # Most of the actions without a pathname only want hash to be
 587                 # set, except for the ones specified in @wants_base that want
 588                 # hash_base instead. It should also be noted that hand-crafted
 589                 # links having 'history' as an action and no pathname or hash
 590                 # set will fail, but that happens regardless of PATH_INFO.
 591                 $input_params{'action'} ||= "shortlog";
 592                 if (grep { $_ eq $input_params{'action'} } @wants_base) {
 593                         $input_params{'hash_base'} ||= $refname;
 594                 } else {
 595                         $input_params{'hash'} ||= $refname;
 596                 }
 597         }
 598
 599         # next, handle the 'parent' part, if present
 600         if (defined $parentrefname) {
 601                 # a missing pathspec defaults to the 'current' filename, allowing e.g.
 602                 # someproject/blobdiff/oldrev..newrev:/filename
 603                 if ($parentpathname) {
 604                         $parentpathname =~ s,^/+,,;
 605                         $parentpathname =~ s,/$,,;
 606                         $input_params{'file_parent'} ||= $parentpathname;
 607                 } else {
 608                         $input_params{'file_parent'} ||= $input_params{'file_name'};
 609                 }
 610                 # we assume that hash_parent_base is wanted if a path was specified,
 611                 # or if the action wants hash_base instead of hash
 612                 if (defined $input_params{'file_parent'} ||
 613                         grep { $_ eq $input_params{'action'} } @wants_base) {
 614                         $input_params{'hash_parent_base'} ||= $parentrefname;
 615                 } else {
 616                         $input_params{'hash_parent'} ||= $parentrefname;
 617                 }
 618         }
 619 }
 620 evaluate_path_info();
 621
 622 our $action = $input_params{'action'};
 623 if (defined $action) {
 624         if (!validate_action($action)) {
 625                 die_error(400, "Invalid action parameter");
 626         }
 627 }
 628
 629 # parameters which are pathnames
 630 our $project = $input_params{'project'};
 631 if (defined $project) {
 632         if (!validate_project($project)) {
 633                 undef $project;
 634                 die_error(404, "No such project");
 635         }
 636 }
 637
 638 our $file_name = $input_params{'file_name'};
 639 if (defined $file_name) {
 640         if (!validate_pathname($file_name)) {
 641                 die_error(400, "Invalid file parameter");
 642         }
 643 }
 644
 645 our $file_parent = $input_params{'file_parent'};
 646 if (defined $file_parent) {
 647         if (!validate_pathname($file_parent)) {
 648                 die_error(400, "Invalid file parent parameter");
 649         }
 650 }
 651
 652 # parameters which are refnames
 653 our $hash = $input_params{'hash'};
 654 if (defined $hash) {
 655         if (!validate_refname($hash)) {
 656                 die_error(400, "Invalid hash parameter");
 657         }
 658 }
 659
 660 our $hash_parent = $input_params{'hash_parent'};
 661 if (defined $hash_parent) {
 662         if (!validate_refname($hash_parent)) {
 663                 die_error(400, "Invalid hash parent parameter");
 664         }
 665 }
 666
 667 our $hash_base = $input_params{'hash_base'};
 668 if (defined $hash_base) {
 669         if (!validate_refname($hash_base)) {
 670                 die_error(400, "Invalid hash base parameter");
 671         }
 672 }
 673
 674 our @extra_options = @{$input_params{'extra_options'}};
 675 # @extra_options is always defined, since it can only be (currently) set from
 676 # CGI, and $cgi->param() returns the empty array in array context if the param
 677 # is not set
 678 foreach my $opt (@extra_options) {
 679         if (not exists $allowed_options{$opt}) {
 680                 die_error(400, "Invalid option parameter");
 681         }
 682         if (not grep(/^$action$/, @{$allowed_options{$opt}})) {
 683                 die_error(400, "Invalid option parameter for this action");
 684         }
 685 }
 686
 687 our $hash_parent_base = $input_params{'hash_parent_base'};
 688 if (defined $hash_parent_base) {
 689         if (!validate_refname($hash_parent_base)) {
 690                 die_error(400, "Invalid hash parent base parameter");
 691         }
 692 }
 693
 694 # other parameters
 695 our $page = $input_params{'page'};
 696 if (defined $page) {
 697         if ($page =~ m/[^0-9]/) {
 698                 die_error(400, "Invalid page parameter");
 699         }
 700 }
 701
 702 our $searchtype = $input_params{'searchtype'};
 703 if (defined $searchtype) {
 704         if ($searchtype =~ m/[^a-z]/) {
 705                 die_error(400, "Invalid searchtype parameter");
 706         }
 707 }
 708
 709 our $search_use_regexp = $input_params{'search_use_regexp'};
 710
 711 our $searchtext = $input_params{'searchtext'};
 712 our $search_regexp;
 713 if (defined $searchtext) {
 714         if (length($searchtext) < 2) {
 715                 die_error(403, "At least two characters are required for search parameter");
 716         }
 717         $search_regexp = $search_use_regexp ? $searchtext : quotemeta $searchtext;
 718 }
 719
 720 # path to the current git repository
 721 our $git_dir;
 722 $git_dir = "$projectroot/$project" if $project;
 723
 724 # list of supported snapshot formats
 725 our @snapshot_fmts = gitweb_check_feature('snapshot');
 726 @snapshot_fmts = filter_snapshot_fmts(@snapshot_fmts);
 727
 728 # dispatch
 729 if (!defined $action) {
 730         if (defined $hash) {
 731                 $action = git_get_type($hash);
 732         } elsif (defined $hash_base && defined $file_name) {
 733                 $action = git_get_type("$hash_base:$file_name");
 734         } elsif (defined $project) {
 735                 $action = 'summary';
 736         } else {
 737                 $action = 'project_list';
 738         }
 739 }
 740 if (!defined($actions{$action})) {
 741         die_error(400, "Unknown action");
 742 }
 743 if ($action !~ m/^(opml|project_list|project_index)$/ &&
 744     !$project) {
 745         die_error(400, "Project needed");
 746 }
 747 $actions{$action}->();
 748 exit;
 749
 750 ## ======================================================================
 751 ## action links
 752
 753 sub href (%) {
 754         my %params = @_;
 755         # default is to use -absolute url() i.e. $my_uri
 756         my $href = $params{-full} ? $my_url : $my_uri;
 757
 758         $params{'project'} = $project unless exists $params{'project'};
 759
 760         if ($params{-replay}) {
 761                 while (my ($name, $symbol) = each %cgi_param_mapping) {
 762                         if (!exists $params{$name}) {
 763                                 $params{$name} = $input_params{$name};
 764                         }
 765                 }
 766         }
 767
 768         my ($use_pathinfo) = gitweb_check_feature('pathinfo');
 769         if ($use_pathinfo) {
 770                 # try to put as many parameters as possible in PATH_INFO:
 771                 #   - project name
 772                 #   - action
 773                 #   - hash_parent or hash_parent_base:/file_parent
 774                 #   - hash or hash_base:/filename
 775
 776                 # When the script is the root DirectoryIndex for the domain,
 777                 # $href here would be something like http://gitweb.example.com/
 778                 # Thus, we strip any trailing / from $href, to spare us double
 779                 # slashes in the final URL
 780                 $href =~ s,/$,,;
 781
 782                 # Then add the project name, if present
 783                 $href .= "/".esc_url($params{'project'}) if defined $params{'project'};
 784                 delete $params{'project'};
 785
 786                 # Summary just uses the project path URL, any other action is
 787                 # added to the URL
 788                 if (defined $params{'action'}) {
 789                         $href .= "/".esc_url($params{'action'}) unless $params{'action'} eq 'summary';
 790                         delete $params{'action'};
 791                 }
 792
 793                 # Next, we put hash_parent_base:/file_parent..hash_base:/file_name,
 794                 # stripping nonexistent or useless pieces
 795                 $href .= "/" if ($params{'hash_base'} || $params{'hash_parent_base'}
 796                         || $params{'hash_parent'} || $params{'hash'});
 797                 if (defined $params{'hash_base'}) {
 798                         if (defined $params{'hash_parent_base'}) {
 799                                 $href .= esc_url($params{'hash_parent_base'});
 800                                 # skip the file_parent if it's the same as the file_name
 801                                 delete $params{'file_parent'} if $params{'file_parent'} eq $params{'file_name'};
 802                                 if (defined $params{'file_parent'} && $params{'file_parent'} !~ /\.\./) {
 803                                         $href .= ":/".esc_url($params{'file_parent'});
 804                                         delete $params{'file_parent'};
 805                                 }
 806                                 $href .= "..";
 807                                 delete $params{'hash_parent'};
 808                                 delete $params{'hash_parent_base'};
 809                         } elsif (defined $params{'hash_parent'}) {
 810                                 $href .= esc_url($params{'hash_parent'}). "..";
 811                                 delete $params{'hash_parent'};
 812                         }
 813
 814                         $href .= esc_url($params{'hash_base'});
 815                         if (defined $params{'file_name'} && $params{'file_name'} !~ /\.\./) {
 816                                 $href .= ":/".esc_url($params{'file_name'});
 817                                 delete $params{'file_name'};
 818                         }
 819                         delete $params{'hash'};
 820                         delete $params{'hash_base'};
 821                 } elsif (defined $params{'hash'}) {
 822                         $href .= esc_url($params{'hash'});
 823                         delete $params{'hash'};
 824                 }
 825         }
 826
 827         # now encode the parameters explicitly
 828         my @result = ();
 829         for (my $i = 0; $i < @cgi_param_mapping; $i += 2) {
 830                 my ($name, $symbol) = ($cgi_param_mapping[$i], $cgi_param_mapping[$i+1]);
 831                 if (defined $params{$name}) {
 832                         if (ref($params{$name}) eq "ARRAY") {
 833                                 foreach my $par (@{$params{$name}}) {
 834                                         push @result, $symbol . "=" . esc_param($par);
 835                                 }
 836                         } else {
 837                                 push @result, $symbol . "=" . esc_param($params{$name});
 838                         }
 839                 }
 840         }
 841         $href .= "?" . join(';', @result) if scalar @result;
 842
 843         return $href;
 844 }
 845
 846
 847 ## ======================================================================
 848 ## validation, quoting/unquoting and escaping
 849
 850 sub validate_action {
 851         my $input = shift || return undef;
 852         return undef unless exists $actions{$input};
 853         return $input;
 854 }
 855
 856 sub validate_project {
 857         my $input = shift || return undef;
 858         if (!validate_pathname($input) ||
 859                 !(-d "$projectroot/$input") ||
 860                 !check_head_link("$projectroot/$input") ||
 861                 ($export_ok && !(-e "$projectroot/$input/$export_ok")) ||
 862                 ($strict_export && !project_in_list($input))) {
 863                 return undef;
 864         } else {
 865                 return $input;
 866         }
 867 }
 868
 869 sub validate_pathname {
 870         my $input = shift || return undef;
 871
 872         # no '.' or '..' as elements of path, i.e. no '.' nor '..'
 873         # at the beginning, at the end, and between slashes.
 874         # also this catches doubled slashes
 875         if ($input =~ m!(^|/)(|\.|\.\.)(/|$)!) {
 876                 return undef;
 877         }
 878         # no null characters
 879         if ($input =~ m!\0!) {
 880                 return undef;
 881         }
 882         return $input;
 883 }
 884
 885 sub validate_refname {
 886         my $input = shift || return undef;
 887
 888         # textual hashes are O.K.
 889         if ($input =~ m/^[0-9a-fA-F]{40}$/) {
 890                 return $input;
 891         }
 892         # it must be correct pathname
 893         $input = validate_pathname($input)
 894                 or return undef;
 895         # restrictions on ref name according to git-check-ref-format
 896         if ($input =~ m!(/\.|\.\.|[\000-\040\177 ~^:?*\[]|/$)!) {
 897                 return undef;
 898         }
 899         return $input;
 900 }
 901
 902 # decode sequences of octets in utf8 into Perl's internal form,
 903 # which is utf-8 with utf8 flag set if needed.  gitweb writes out
 904 # in utf-8 thanks to "binmode STDOUT, ':utf8'" at beginning
 905 sub to_utf8 {
 906         my $str = shift;
 907         if (utf8::valid($str)) {
 908                 utf8::decode($str);
 909                 return $str;
 910         } else {
 911                 return decode($fallback_encoding, $str, Encode::FB_DEFAULT);
 912         }
 913 }
 914
 915 # quote unsafe chars, but keep the slash, even when it's not
 916 # correct, but quoted slashes look too horrible in bookmarks
 917 sub esc_param {
 918         my $str = shift;
 919         $str =~ s/([^A-Za-z0-9\-_.~()\/:@])/sprintf("%%%02X", ord($1))/eg;
 920         $str =~ s/\+/%2B/g;
 921         $str =~ s/ /\+/g;
 922         return $str;
 923 }
 924
 925 # quote unsafe chars in whole URL, so some charactrs cannot be quoted
 926 sub esc_url {
 927         my $str = shift;
 928         $str =~ s/([^A-Za-z0-9\-_.~();\/;?:@&=])/sprintf("%%%02X", ord($1))/eg;
 929         $str =~ s/\+/%2B/g;
 930         $str =~ s/ /\+/g;
 931         return $str;
 932 }
 933
 934 # replace invalid utf8 character with SUBSTITUTION sequence
 935 sub esc_html ($;%) {
 936         my $str = shift;
 937         my %opts = @_;
 938
 939         $str = to_utf8($str);
 940         $str = $cgi->escapeHTML($str);
 941         if ($opts{'-nbsp'}) {
 942                 $str =~ s/ /&nbsp;/g;
 943         }
 944         $str =~ s|([[:cntrl:]])|(($1 ne "\t") ? quot_cec($1) : $1)|eg;
 945         return $str;
 946 }
 947
 948 # quote control characters and escape filename to HTML
 949 sub esc_path {
 950         my $str = shift;
 951         my %opts = @_;
 952
 953         $str = to_utf8($str);
 954         $str = $cgi->escapeHTML($str);
 955         if ($opts{'-nbsp'}) {
 956                 $str =~ s/ /&nbsp;/g;
 957         }
 958         $str =~ s|([[:cntrl:]])|quot_cec($1)|eg;
 959         return $str;
 960 }
 961
 962 # Make control characters "printable", using character escape codes (CEC)
 963 sub quot_cec {
 964         my $cntrl = shift;
 965         my %opts = @_;
 966         my %es = ( # character escape codes, aka escape sequences
 967                 "\t" => '\t',   # tab            (HT)
 968                 "\n" => '\n',   # line feed      (LF)
 969                 "\r" => '\r',   # carrige return (CR)
 970                 "\f" => '\f',   # form feed      (FF)
 971                 "\b" => '\b',   # backspace      (BS)
 972                 "\a" => '\a',   # alarm (bell)   (BEL)
 973                 "\e" => '\e',   # escape         (ESC)
 974                 "\013" => '\v', # vertical tab   (VT)
 975                 "\000" => '\0', # nul character  (NUL)
 976         );
 977         my $chr = ( (exists $es{$cntrl})
 978                     ? $es{$cntrl}
 979                     : sprintf('\%2x', ord($cntrl)) );
 980         if ($opts{-nohtml}) {
 981                 return $chr;
 982         } else {
 983                 return "<span class=\"cntrl\">$chr</span>";
 984         }
 985 }
 986
 987 # Alternatively use unicode control pictures codepoints,
 988 # Unicode "printable representation" (PR)
 989 sub quot_upr {
 990         my $cntrl = shift;
 991         my %opts = @_;
 992
 993         my $chr = sprintf('&#%04d;', 0x2400+ord($cntrl));
 994         if ($opts{-nohtml}) {
 995                 return $chr;
 996         } else {
 997                 return "<span class=\"cntrl\">$chr</span>";
 998         }
 999 }
1000
1001 # git may return quoted and escaped filenames
1002 sub unquote {
1003         my $str = shift;
1004
1005         sub unq {
1006                 my $seq = shift;
1007                 my %es = ( # character escape codes, aka escape sequences
1008                         't' => "\t",   # tab            (HT, TAB)
1009                         'n' => "\n",   # newline        (NL)
1010                         'r' => "\r",   # return         (CR)
1011                         'f' => "\f",   # form feed      (FF)
1012                         'b' => "\b",   # backspace      (BS)
1013                         'a' => "\a",   # alarm (bell)   (BEL)
1014                         'e' => "\e",   # escape         (ESC)
1015                         'v' => "\013", # vertical tab   (VT)
1016                 );
1017
1018                 if ($seq =~ m/^[0-7]{1,3}$/) {
1019                         # octal char sequence
1020                         return chr(oct($seq));
1021                 } elsif (exists $es{$seq}) {
1022                         # C escape sequence, aka character escape code
1023                         return $es{$seq};
1024                 }
1025                 # quoted ordinary character
1026                 return $seq;
1027         }
1028
1029         if ($str =~ m/^"(.*)"$/) {
1030                 # needs unquoting
1031                 $str = $1;
1032                 $str =~ s/\\([^0-7]|[0-7]{1,3})/unq($1)/eg;
1033         }
1034         return $str;
1035 }
1036
1037 # escape tabs (convert tabs to spaces)
1038 sub untabify {
1039         my $line = shift;
1040
1041         while ((my $pos = index($line, "\t")) != -1) {
1042                 if (my $count = (8 - ($pos % 8))) {
1043                         my $spaces = ' ' x $count;
1044                         $line =~ s/\t/$spaces/;
1045                 }
1046         }
1047
1048         return $line;
1049 }
1050
1051 sub project_in_list {
1052         my $project = shift;
1053         my @list = git_get_projects_list();
1054         return @list && scalar(grep { $_->{'path'} eq $project } @list);
1055 }
1056
1057 ## ----------------------------------------------------------------------
1058 ## HTML aware string manipulation
1059
1060 # Try to chop given string on a word boundary between position
1061 # $len and $len+$add_len. If there is no word boundary there,
1062 # chop at $len+$add_len. Do not chop if chopped part plus ellipsis
1063 # (marking chopped part) would be longer than given string.
1064 sub chop_str {
1065         my $str = shift;
1066         my $len = shift;
1067         my $add_len = shift || 10;
1068         my $where = shift || 'right'; # 'left' | 'center' | 'right'
1069
1070         # Make sure perl knows it is utf8 encoded so we don't
1071         # cut in the middle of a utf8 multibyte char.
1072         $str = to_utf8($str);
1073
1074         # allow only $len chars, but don't cut a word if it would fit in $add_len
1075         # if it doesn't fit, cut it if it's still longer than the dots we would add
1076         # remove chopped character entities entirely
1077
1078         # when chopping in the middle, distribute $len into left and right part
1079         # return early if chopping wouldn't make string shorter
1080         if ($where eq 'center') {
1081                 return $str if ($len + 5 >= length($str)); # filler is length 5
1082                 $len = int($len/2);
1083         } else {
1084                 return $str if ($len + 4 >= length($str)); # filler is length 4
1085         }
1086
1087         # regexps: ending and beginning with word part up to $add_len
1088         my $endre = qr/.{$len}\w{0,$add_len}/;
1089         my $begre = qr/\w{0,$add_len}.{$len}/;
1090
1091         if ($where eq 'left') {
1092                 $str =~ m/^(.*?)($begre)$/;
1093                 my ($lead, $body) = ($1, $2);
1094                 if (length($lead) > 4) {
1095                         $body =~ s/^[^;]*;// if ($lead =~ m/&[^;]*$/);
1096                         $lead = " ...";
1097                 }
1098                 return "$lead$body";
1099
1100         } elsif ($where eq 'center') {
1101                 $str =~ m/^($endre)(.*)$/;
1102                 my ($left, $str)  = ($1, $2);
1103                 $str =~ m/^(.*?)($begre)$/;
1104                 my ($mid, $right) = ($1, $2);
1105                 if (length($mid) > 5) {
1106                         $left  =~ s/&[^;]*$//;
1107                         $right =~ s/^[^;]*;// if ($mid =~ m/&[^;]*$/);
1108                         $mid = " ... ";
1109                 }
1110                 return "$left$mid$right";
1111
1112         } else {
1113                 $str =~ m/^($endre)(.*)$/;
1114                 my $body = $1;
1115                 my $tail = $2;
1116                 if (length($tail) > 4) {
1117                         $body =~ s/&[^;]*$//;
1118                         $tail = "... ";
1119                 }
1120                 return "$body$tail";
1121         }
1122 }
1123
1124 # takes the same arguments as chop_str, but also wraps a <span> around the
1125 # result with a title attribute if it does get chopped. Additionally, the
1126 # string is HTML-escaped.
1127 sub chop_and_escape_str {
1128         my ($str) = @_;
1129
1130         my $chopped = chop_str(@_);
1131         if ($chopped eq $str) {
1132                 return esc_html($chopped);
1133         } else {
1134                 $str =~ s/([[:cntrl:]])/?/g;
1135                 return $cgi->span({-title=>$str}, esc_html($chopped));
1136         }
1137 }
1138
1139 ## ----------------------------------------------------------------------
1140 ## functions returning short strings
1141
1142 # CSS class for given age value (in seconds)
1143 sub age_class {
1144         my $age = shift;
1145
1146         if (!defined $age) {
1147                 return "noage";
1148         } elsif ($age < 60*60*2) {
1149                 return "age0";
1150         } elsif ($age < 60*60*24*2) {
1151                 return "age1";
1152         } else {
1153                 return "age2";
1154         }
1155 }
1156
1157 # convert age in seconds to "nn units ago" string
1158 sub age_string {
1159         my $age = shift;
1160         my $age_str;
1161
1162         if ($age > 60*60*24*365*2) {
1163                 $age_str = (int $age/60/60/24/365);
1164                 $age_str .= " years ago";
1165         } elsif ($age > 60*60*24*(365/12)*2) {
1166                 $age_str = int $age/60/60/24/(365/12);
1167                 $age_str .= " months ago";
1168         } elsif ($age > 60*60*24*7*2) {
1169                 $age_str = int $age/60/60/24/7;
1170                 $age_str .= " weeks ago";
1171         } elsif ($age > 60*60*24*2) {
1172                 $age_str = int $age/60/60/24;
1173                 $age_str .= " days ago";
1174         } elsif ($age > 60*60*2) {
1175                 $age_str = int $age/60/60;
1176                 $age_str .= " hours ago";
1177         } elsif ($age > 60*2) {
1178                 $age_str = int $age/60;
1179                 $age_str .= " min ago";
1180         } elsif ($age > 2) {
1181                 $age_str = int $age;
1182                 $age_str .= " sec ago";
1183         } else {
1184                 $age_str .= " right now";
1185         }
1186         return $age_str;
1187 }
1188
1189 use constant {
1190         S_IFINVALID => 0030000,
1191         S_IFGITLINK => 0160000,
1192 };
1193
1194 # submodule/subproject, a commit object reference
1195 sub S_ISGITLINK($) {
1196         my $mode = shift;
1197
1198         return (($mode & S_IFMT) == S_IFGITLINK)
1199 }
1200
1201 # convert file mode in octal to symbolic file mode string
1202 sub mode_str {
1203         my $mode = oct shift;
1204
1205         if (S_ISGITLINK($mode)) {
1206                 return 'm---------';
1207         } elsif (S_ISDIR($mode & S_IFMT)) {
1208                 return 'drwxr-xr-x';
1209         } elsif (S_ISLNK($mode)) {
1210                 return 'lrwxrwxrwx';
1211         } elsif (S_ISREG($mode)) {
1212                 # git cares only about the executable bit
1213                 if ($mode & S_IXUSR) {
1214                         return '-rwxr-xr-x';
1215                 } else {
1216                         return '-rw-r--r--';
1217                 };
1218         } else {
1219                 return '----------';
1220         }
1221 }
1222
1223 # convert file mode in octal to file type string
1224 sub file_type {
1225         my $mode = shift;
1226
1227         if ($mode !~ m/^[0-7]+$/) {
1228                 return $mode;
1229         } else {
1230                 $mode = oct $mode;
1231         }
1232
1233         if (S_ISGITLINK($mode)) {
1234                 return "submodule";
1235         } elsif (S_ISDIR($mode & S_IFMT)) {
1236                 return "directory";
1237         } elsif (S_ISLNK($mode)) {
1238                 return "symlink";
1239         } elsif (S_ISREG($mode)) {
1240                 return "file";
1241         } else {
1242                 return "unknown";
1243         }
1244 }
1245
1246 # convert file mode in octal to file type description string
1247 sub file_type_long {
1248         my $mode = shift;
1249
1250         if ($mode !~ m/^[0-7]+$/) {
1251                 return $mode;
1252         } else {
1253                 $mode = oct $mode;
1254         }
1255
1256         if (S_ISGITLINK($mode)) {
1257                 return "submodule";
1258         } elsif (S_ISDIR($mode & S_IFMT)) {
1259                 return "directory";
1260         } elsif (S_ISLNK($mode)) {
1261                 return "symlink";
1262         } elsif (S_ISREG($mode)) {
1263                 if ($mode & S_IXUSR) {
1264                         return "executable";
1265                 } else {
1266                         return "file";
1267                 };
1268         } else {
1269                 return "unknown";
1270         }
1271 }
1272
1273
1274 ## ----------------------------------------------------------------------
1275 ## functions returning short HTML fragments, or transforming HTML fragments
1276 ## which don't belong to other sections
1277
1278 # format line of commit message.
1279 sub format_log_line_html {
1280         my $line = shift;
1281
1282         $line = esc_html($line, -nbsp=>1);
1283         if ($line =~ m/([0-9a-fA-F]{8,40})/) {
1284                 my $hash_text = $1;
1285                 my $link =
1286                         $cgi->a({-href => href(action=>"object", hash=>$hash_text),
1287                                 -class => "text"}, $hash_text);
1288                 $line =~ s/$hash_text/$link/;
1289         }
1290         return $line;
1291 }
1292
1293 # format marker of refs pointing to given object
1294
1295 # the destination action is chosen based on object type and current context:
1296 # - for annotated tags, we choose the tag view unless it's the current view
1297 #   already, in which case we go to shortlog view
1298 # - for other refs, we keep the current view if we're in history, shortlog or
1299 #   log view, and select shortlog otherwise
1300 sub format_ref_marker {
1301         my ($refs, $id) = @_;
1302         my $markers = '';
1303
1304         if (defined $refs->{$id}) {
1305                 foreach my $ref (@{$refs->{$id}}) {
1306                         # this code exploits the fact that non-lightweight tags are the
1307                         # only indirect objects, and that they are the only objects for which
1308                         # we want to use tag instead of shortlog as action
1309                         my ($type, $name) = qw();
1310                         my $indirect = ($ref =~ s/\^\{\}$//);
1311                         # e.g. tags/v2.6.11 or heads/next
1312                         if ($ref =~ m!^(.*?)s?/(.*)$!) {
1313                                 $type = $1;
1314                                 $name = $2;
1315                         } else {
1316                                 $type = "ref";
1317                                 $name = $ref;
1318                         }
1319
1320                         my $class = $type;
1321                         $class .= " indirect" if $indirect;
1322
1323                         my $dest_action = "shortlog";
1324
1325                         if ($indirect) {
1326                                 $dest_action = "tag" unless $action eq "tag";
1327                         } elsif ($action =~ /^(history|(short)?log)$/) {
1328                                 $dest_action = $action;
1329                         }
1330
1331                         my $dest = "";
1332                         $dest .= "refs/" unless $ref =~ m!^refs/!;
1333                         $dest .= $ref;
1334
1335                         my $link = $cgi->a({
1336                                 -href => href(
1337                                         action=>$dest_action,
1338                                         hash=>$dest
1339                                 )}, $name);
1340
1341                         $markers .= " <span class=\"$class\" title=\"$ref\">" .
1342                                 $link . "</span>";
1343                 }
1344         }
1345
1346         if ($markers) {
1347                 return ' <span class="refs">'. $markers . '</span>';
1348         } else {
1349                 return "";
1350         }
1351 }
1352
1353 # format, perhaps shortened and with markers, title line
1354 sub format_subject_html {
1355         my ($long, $short, $href, $extra) = @_;
1356         $extra = '' unless defined($extra);
1357
1358         if (length($short) < length($long)) {
1359                 return $cgi->a({-href => $href, -class => "list subject",
1360                                 -title => to_utf8($long)},
1361                        esc_html($short) . $extra);
1362         } else {
1363                 return $cgi->a({-href => $href, -class => "list subject"},
1364                        esc_html($long)  . $extra);
1365         }
1366 }
1367
1368 # format git diff header line, i.e. "diff --(git|combined|cc) ..."
1369 sub format_git_diff_header_line {
1370         my $line = shift;
1371         my $diffinfo = shift;
1372         my ($from, $to) = @_;
1373
1374         if ($diffinfo->{'nparents'}) {
1375                 # combined diff
1376                 $line =~ s!^(diff (.*?) )"?.*$!$1!;
1377                 if ($to->{'href'}) {
1378                         $line .= $cgi->a({-href => $to->{'href'}, -class => "path"},
1379                                          esc_path($to->{'file'}));
1380                 } else { # file was deleted (no href)
1381                         $line .= esc_path($to->{'file'});
1382                 }
1383         } else {
1384                 # "ordinary" diff
1385                 $line =~ s!^(diff (.*?) )"?a/.*$!$1!;
1386                 if ($from->{'href'}) {
1387                         $line .= $cgi->a({-href => $from->{'href'}, -class => "path"},
1388                                          'a/' . esc_path($from->{'file'}));
1389                 } else { # file was added (no href)
1390                         $line .= 'a/' . esc_path($from->{'file'});
1391                 }
1392                 $line .= ' ';
1393                 if ($to->{'href'}) {
1394                         $line .= $cgi->a({-href => $to->{'href'}, -class => "path"},
1395                                          'b/' . esc_path($to->{'file'}));
1396                 } else { # file was deleted
1397                         $line .= 'b/' . esc_path($to->{'file'});
1398                 }
1399         }
1400
1401         return "<div class=\"diff header\">$line</div>\n";
1402 }
1403
1404 # format extended diff header line, before patch itself
1405 sub format_extended_diff_header_line {
1406         my $line = shift;
1407         my $diffinfo = shift;
1408         my ($from, $to) = @_;
1409
1410         # match <path>
1411         if ($line =~ s!^((copy|rename) from ).*$!$1! && $from->{'href'}) {
1412                 $line .= $cgi->a({-href=>$from->{'href'}, -class=>"path"},
1413                                        esc_path($from->{'file'}));
1414         }
1415         if ($line =~ s!^((copy|rename) to ).*$!$1! && $to->{'href'}) {
1416                 $line .= $cgi->a({-href=>$to->{'href'}, -class=>"path"},
1417                                  esc_path($to->{'file'}));
1418         }
1419         # match single <mode>
1420         if ($line =~ m/\s(\d{6})$/) {
1421                 $line .= '<span class="info"> (' .
1422                          file_type_long($1) .
1423                          ')</span>';
1424         }
1425         # match <hash>
1426         if ($line =~ m/^index [0-9a-fA-F]{40},[0-9a-fA-F]{40}/) {
1427                 # can match only for combined diff
1428                 $line = 'index ';
1429                 for (my $i = 0; $i < $diffinfo->{'nparents'}; $i++) {
1430                         if ($from->{'href'}[$i]) {
1431                                 $line .= $cgi->a({-href=>$from->{'href'}[$i],
1432                                                   -class=>"hash"},
1433                                                  substr($diffinfo->{'from_id'}[$i],0,7));
1434                         } else {
1435                                 $line .= '0' x 7;
1436                         }
1437                         # separator
1438                         $line .= ',' if ($i < $diffinfo->{'nparents'} - 1);
1439                 }
1440                 $line .= '..';
1441                 if ($to->{'href'}) {
1442                         $line .= $cgi->a({-href=>$to->{'href'}, -class=>"hash"},
1443                                          substr($diffinfo->{'to_id'},0,7));
1444                 } else {
1445                         $line .= '0' x 7;
1446                 }
1447
1448         } elsif ($line =~ m/^index [0-9a-fA-F]{40}..[0-9a-fA-F]{40}/) {
1449                 # can match only for ordinary diff
1450                 my ($from_link, $to_link);
1451                 if ($from->{'href'}) {
1452                         $from_link = $cgi->a({-href=>$from->{'href'}, -class=>"hash"},
1453                                              substr($diffinfo->{'from_id'},0,7));
1454                 } else {
1455                         $from_link = '0' x 7;
1456                 }
1457                 if ($to->{'href'}) {
1458                         $to_link = $cgi->a({-href=>$to->{'href'}, -class=>"hash"},
1459                                            substr($diffinfo->{'to_id'},0,7));
1460                 } else {
1461                         $to_link = '0' x 7;
1462                 }
1463                 my ($from_id, $to_id) = ($diffinfo->{'from_id'}, $diffinfo->{'to_id'});
1464                 $line =~ s!$from_id\.\.$to_id!$from_link..$to_link!;
1465         }
1466
1467         return $line . "<br/>\n";
1468 }
1469
1470 # format from-file/to-file diff header
1471 sub format_diff_from_to_header {
1472         my ($from_line, $to_line, $diffinfo, $from, $to, @parents) = @_;
1473         my $line;
1474         my $result = '';
1475
1476         $line = $from_line;
1477         #assert($line =~ m/^---/) if DEBUG;
1478         # no extra formatting for "^--- /dev/null"
1479         if (! $diffinfo->{'nparents'}) {
1480                 # ordinary (single parent) diff
1481                 if ($line =~ m!^--- "?a/!) {
1482                         if ($from->{'href'}) {
1483                                 $line = '--- a/' .
1484                                         $cgi->a({-href=>$from->{'href'}, -class=>"path"},
1485                                                 esc_path($from->{'file'}));
1486                         } else {
1487                                 $line = '--- a/' .
1488                                         esc_path($from->{'file'});
1489                         }
1490                 }
1491                 $result .= qq!<div class="diff from_file">$line</div>\n!;
1492
1493         } else {
1494                 # combined diff (merge commit)
1495                 for (my $i = 0; $i < $diffinfo->{'nparents'}; $i++) {
1496                         if ($from->{'href'}[$i]) {
1497                                 $line = '--- ' .
1498                                         $cgi->a({-href=>href(action=>"blobdiff",
1499                                                              hash_parent=>$diffinfo->{'from_id'}[$i],
1500                                                              hash_parent_base=>$parents[$i],
1501                                                              file_parent=>$from->{'file'}[$i],
1502                                                              hash=>$diffinfo->{'to_id'},
1503                                                              hash_base=>$hash,
1504                                                              file_name=>$to->{'file'}),
1505                                                  -class=>"path",
1506                                                  -title=>"diff" . ($i+1)},
1507                                                 $i+1) .
1508                                         '/' .
1509                                         $cgi->a({-href=>$from->{'href'}[$i], -class=>"path"},
1510                                                 esc_path($from->{'file'}[$i]));
1511                         } else {
1512                                 $line = '--- /dev/null';
1513                         }
1514                         $result .= qq!<div class="diff from_file">$line</div>\n!;
1515                 }
1516         }
1517
1518         $line = $to_line;
1519         #assert($line =~ m/^\+\+\+/) if DEBUG;
1520         # no extra formatting for "^+++ /dev/null"
1521         if ($line =~ m!^\+\+\+ "?b/!) {
1522                 if ($to->{'href'}) {
1523                         $line = '+++ b/' .
1524                                 $cgi->a({-href=>$to->{'href'}, -class=>"path"},
1525                                         esc_path($to->{'file'}));
1526                 } else {
1527                         $line = '+++ b/' .
1528                                 esc_path($to->{'file'});
1529                 }
1530         }
1531         $result .= qq!<div class="diff to_file">$line</div>\n!;
1532
1533         return $result;
1534 }
1535
1536 # create note for patch simplified by combined diff
1537 sub format_diff_cc_simplified {
1538         my ($diffinfo, @parents) = @_;
1539         my $result = '';
1540
1541         $result .= "<div class=\"diff header\">" .
1542                    "diff --cc ";
1543         if (!is_deleted($diffinfo)) {
1544                 $result .= $cgi->a({-href => href(action=>"blob",
1545                                                   hash_base=>$hash,
1546                                                   hash=>$diffinfo->{'to_id'},
1547                                                   file_name=>$diffinfo->{'to_file'}),
1548                                     -class => "path"},
1549                                    esc_path($diffinfo->{'to_file'}));
1550         } else {
1551                 $result .= esc_path($diffinfo->{'to_file'});
1552         }
1553         $result .= "</div>\n" . # class="diff header"
1554                    "<div class=\"diff nodifferences\">" .
1555                    "Simple merge" .
1556                    "</div>\n"; # class="diff nodifferences"
1557
1558         return $result;
1559 }
1560
1561 # format patch (diff) line (not to be used for diff headers)
1562 sub format_diff_line {
1563         my $line = shift;
1564         my ($from, $to) = @_;
1565         my $diff_class = "";
1566
1567         chomp $line;
1568
1569         if ($from && $to && ref($from->{'href'}) eq "ARRAY") {
1570                 # combined diff
1571                 my $prefix = substr($line, 0, scalar @{$from->{'href'}});
1572                 if ($line =~ m/^\@{3}/) {
1573                         $diff_class = " chunk_header";
1574                 } elsif ($line =~ m/^\\/) {
1575                         $diff_class = " incomplete";
1576                 } elsif ($prefix =~ tr/+/+/) {
1577                         $diff_class = " add";
1578                 } elsif ($prefix =~ tr/-/-/) {
1579                         $diff_class = " rem";
1580                 }
1581         } else {
1582                 # assume ordinary diff
1583                 my $char = substr($line, 0, 1);
1584                 if ($char eq '+') {
1585                         $diff_class = " add";
1586                 } elsif ($char eq '-') {
1587                         $diff_class = " rem";
1588                 } elsif ($char eq '@') {
1589                         $diff_class = " chunk_header";
1590                 } elsif ($char eq "\\") {
1591                         $diff_class = " incomplete";
1592                 }
1593         }
1594         $line = untabify($line);
1595         if ($from && $to && $line =~ m/^\@{2} /) {
1596                 my ($from_text, $from_start, $from_lines, $to_text, $to_start, $to_lines, $section) =
1597                         $line =~ m/^\@{2} (-(\d+)(?:,(\d+))?) (\+(\d+)(?:,(\d+))?) \@{2}(.*)$/;
1598
1599                 $from_lines = 0 unless defined $from_lines;
1600                 $to_lines   = 0 unless defined $to_lines;
1601
1602                 if ($from->{'href'}) {
1603                         $from_text = $cgi->a({-href=>"$from->{'href'}#l$from_start",
1604                                              -class=>"list"}, $from_text);
1605                 }
1606                 if ($to->{'href'}) {
1607                         $to_text   = $cgi->a({-href=>"$to->{'href'}#l$to_start",
1608                                              -class=>"list"}, $to_text);
1609                 }
1610                 $line = "<span class=\"chunk_info\">@@ $from_text $to_text @@</span>" .
1611                         "<span class=\"section\">" . esc_html($section, -nbsp=>1) . "</span>";
1612                 return "<div class=\"diff$diff_class\">$line</div>\n";
1613         } elsif ($from && $to && $line =~ m/^\@{3}/) {
1614                 my ($prefix, $ranges, $section) = $line =~ m/^(\@+) (.*?) \@+(.*)$/;
1615                 my (@from_text, @from_start, @from_nlines, $to_text, $to_start, $to_nlines);
1616
1617                 @from_text = split(' ', $ranges);
1618                 for (my $i = 0; $i < @from_text; ++$i) {
1619                         ($from_start[$i], $from_nlines[$i]) =
1620                                 (split(',', substr($from_text[$i], 1)), 0);
1621                 }
1622
1623                 $to_text   = pop @from_text;
1624                 $to_start  = pop @from_start;
1625                 $to_nlines = pop @from_nlines;
1626
1627                 $line = "<span class=\"chunk_info\">$prefix ";
1628                 for (my $i = 0; $i < @from_text; ++$i) {
1629                         if ($from->{'href'}[$i]) {
1630                                 $line .= $cgi->a({-href=>"$from->{'href'}[$i]#l$from_start[$i]",
1631                                                   -class=>"list"}, $from_text[$i]);
1632                         } else {
1633                                 $line .= $from_text[$i];
1634                         }
1635                         $line .= " ";
1636                 }
1637                 if ($to->{'href'}) {
1638                         $line .= $cgi->a({-href=>"$to->{'href'}#l$to_start",
1639                                           -class=>"list"}, $to_text);
1640                 } else {
1641                         $line .= $to_text;
1642                 }
1643                 $line .= " $prefix</span>" .
1644                          "<span class=\"section\">" . esc_html($section, -nbsp=>1) . "</span>";
1645                 return "<div class=\"diff$diff_class\">$line</div>\n";
1646         }
1647         return "<div class=\"diff$diff_class\">" . esc_html($line, -nbsp=>1) . "</div>\n";
1648 }
1649
1650 # Generates undef or something like "_snapshot_" or "snapshot (_tbz2_ _zip_)",
1651 # linked.  Pass the hash of the tree/commit to snapshot.
1652 sub format_snapshot_links {
1653         my ($hash) = @_;
1654         my $num_fmts = @snapshot_fmts;
1655         if ($num_fmts > 1) {
1656                 # A parenthesized list of links bearing format names.
1657                 # e.g. "snapshot (_tar.gz_ _zip_)"
1658                 return "snapshot (" . join(' ', map
1659                         $cgi->a({
1660                                 -href => href(
1661                                         action=>"snapshot",
1662                                         hash=>$hash,
1663                                         snapshot_format=>$_
1664                                 )
1665                         }, $known_snapshot_formats{$_}{'display'})
1666                 , @snapshot_fmts) . ")";
1667         } elsif ($num_fmts == 1) {
1668                 # A single "snapshot" link whose tooltip bears the format name.
1669                 # i.e. "_snapshot_"
1670                 my ($fmt) = @snapshot_fmts;
1671                 return
1672                         $cgi->a({
1673                                 -href => href(
1674                                         action=>"snapshot",
1675                                         hash=>$hash,
1676                                         snapshot_format=>$fmt
1677                                 ),
1678                                 -title => "in format: $known_snapshot_formats{$fmt}{'display'}"
1679                         }, "snapshot");
1680         } else { # $num_fmts == 0
1681                 return undef;
1682         }
1683 }
1684
1685 ## ......................................................................
1686 ## functions returning values to be passed, perhaps after some
1687 ## transformation, to other functions; e.g. returning arguments to href()
1688
1689 # returns hash to be passed to href to generate gitweb URL
1690 # in -title key it returns description of link
1691 sub get_feed_info {
1692         my $format = shift || 'Atom';
1693         my %res = (action => lc($format));
1694
1695         # feed links are possible only for project views
1696         return unless (defined $project);
1697         # some views should link to OPML, or to generic project feed,
1698         # or don't have specific feed yet (so they should use generic)
1699         return if ($action =~ /^(?:tags|heads|forks|tag|search)$/x);
1700
1701         my $branch;
1702         # branches refs uses 'refs/heads/' prefix (fullname) to differentiate
1703         # from tag links; this also makes possible to detect branch links
1704         if ((defined $hash_base && $hash_base =~ m!^refs/heads/(.*)$!) ||
1705             (defined $hash      && $hash      =~ m!^refs/heads/(.*)$!)) {
1706                 $branch = $1;
1707         }
1708         # find log type for feed description (title)
1709         my $type = 'log';
1710         if (defined $file_name) {
1711                 $type  = "history of $file_name";
1712                 $type .= "/" if ($action eq 'tree');
1713                 $type .= " on '$branch'" if (defined $branch);
1714         } else {
1715                 $type = "log of $branch" if (defined $branch);
1716         }
1717
1718         $res{-title} = $type;
1719         $res{'hash'} = (defined $branch ? "refs/heads/$branch" : undef);
1720         $res{'file_name'} = $file_name;
1721
1722         return %res;
1723 }
1724
1725 ## ----------------------------------------------------------------------
1726 ## git utility subroutines, invoking git commands
1727
1728 # returns path to the core git executable and the --git-dir parameter as list
1729 sub git_cmd {
1730         return $GIT, '--git-dir='.$git_dir;
1731 }
1732
1733 # quote the given arguments for passing them to the shell
1734 # quote_command("command", "arg 1", "arg with ' and ! characters")
1735 # => "'command' 'arg 1' 'arg with '\'' and '\!' characters'"
1736 # Try to avoid using this function wherever possible.
1737 sub quote_command {
1738         return join(' ',
1739                     map( { my $a = $_; $a =~ s/(['!])/'\\$1'/g; "'$a'" } @_ ));
1740 }
1741
1742 # get HEAD ref of given project as hash
1743 sub git_get_head_hash {
1744         my $project = shift;
1745         my $o_git_dir = $git_dir;
1746         my $retval = undef;
1747         $git_dir = "$projectroot/$project";
1748         if (open my $fd, "-|", git_cmd(), "rev-parse", "--verify", "HEAD") {
1749                 my $head = <$fd>;
1750                 close $fd;
1751                 if (defined $head && $head =~ /^([0-9a-fA-F]{40})$/) {
1752                         $retval = $1;
1753                 }
1754         }
1755         if (defined $o_git_dir) {
1756                 $git_dir = $o_git_dir;
1757         }
1758         return $retval;
1759 }
1760
1761 # get type of given object
1762 sub git_get_type {
1763         my $hash = shift;
1764
1765         open my $fd, "-|", git_cmd(), "cat-file", '-t', $hash or return;
1766         my $type = <$fd>;
1767         close $fd or return;
1768         chomp $type;
1769         return $type;
1770 }
1771
1772 # repository configuration
1773 our $config_file = '';
1774 our %config;
1775
1776 # store multiple values for single key as anonymous array reference
1777 # single values stored directly in the hash, not as [ <value> ]
1778 sub hash_set_multi {
1779         my ($hash, $key, $value) = @_;
1780
1781         if (!exists $hash->{$key}) {
1782                 $hash->{$key} = $value;
1783         } elsif (!ref $hash->{$key}) {
1784                 $hash->{$key} = [ $hash->{$key}, $value ];
1785         } else {
1786                 push @{$hash->{$key}}, $value;
1787         }
1788 }
1789
1790 # return hash of git project configuration
1791 # optionally limited to some section, e.g. 'gitweb'
1792 sub git_parse_project_config {
1793         my $section_regexp = shift;
1794         my %config;
1795
1796         local $/ = "\0";
1797
1798         open my $fh, "-|", git_cmd(), "config", '-z', '-l',
1799                 or return;
1800
1801         while (my $keyval = <$fh>) {
1802                 chomp $keyval;
1803                 my ($key, $value) = split(/\n/, $keyval, 2);
1804
1805                 hash_set_multi(\%config, $key, $value)
1806                         if (!defined $section_regexp || $key =~ /^(?:$section_regexp)\./o);
1807         }
1808         close $fh;
1809
1810         return %config;
1811 }
1812
1813 # convert config value to boolean, 'true' or 'false'
1814 # no value, number > 0, 'true' and 'yes' values are true
1815 # rest of values are treated as false (never as error)
1816 sub config_to_bool {
1817         my $val = shift;
1818
1819         # strip leading and trailing whitespace
1820         $val =~ s/^\s+//;
1821         $val =~ s/\s+$//;
1822
1823         return (!defined $val ||               # section.key
1824                 ($val =~ /^\d+$/ && $val) ||   # section.key = 1
1825                 ($val =~ /^(?:true|yes)$/i));  # section.key = true
1826 }
1827
1828 # convert config value to simple decimal number
1829 # an optional value suffix of 'k', 'm', or 'g' will cause the value
1830 # to be multiplied by 1024, 1048576, or 1073741824
1831 sub config_to_int {
1832         my $val = shift;
1833
1834         # strip leading and trailing whitespace
1835         $val =~ s/^\s+//;
1836         $val =~ s/\s+$//;
1837
1838         if (my ($num, $unit) = ($val =~ /^([0-9]*)([kmg])$/i)) {
1839                 $unit = lc($unit);
1840                 # unknown unit is treated as 1
1841                 return $num * ($unit eq 'g' ? 1073741824 :
1842                                $unit eq 'm' ?    1048576 :
1843                                $unit eq 'k' ?       1024 : 1);
1844         }
1845         return $val;
1846 }
1847
1848 # convert config value to array reference, if needed
1849 sub config_to_multi {
1850         my $val = shift;
1851
1852         return ref($val) ? $val : (defined($val) ? [ $val ] : []);
1853 }
1854
1855 sub git_get_project_config {
1856         my ($key, $type) = @_;
1857
1858         # key sanity check
1859         return unless ($key);
1860         $key =~ s/^gitweb\.//;
1861         return if ($key =~ m/\W/);
1862
1863         # type sanity check
1864         if (defined $type) {
1865                 $type =~ s/^--//;
1866                 $type = undef
1867                         unless ($type eq 'bool' || $type eq 'int');
1868         }
1869
1870         # get config
1871         if (!defined $config_file ||
1872             $config_file ne "$git_dir/config") {
1873                 %config = git_parse_project_config('gitweb');
1874                 $config_file = "$git_dir/config";
1875         }
1876
1877         # ensure given type
1878         if (!defined $type) {
1879                 return $config{"gitweb.$key"};
1880         } elsif ($type eq 'bool') {
1881                 # backward compatibility: 'git config --bool' returns true/false
1882                 return config_to_bool($config{"gitweb.$key"}) ? 'true' : 'false';
1883         } elsif ($type eq 'int') {
1884                 return config_to_int($config{"gitweb.$key"});
1885         }
1886         return $config{"gitweb.$key"};
1887 }
1888
1889 # get hash of given path at given ref
1890 sub git_get_hash_by_path {
1891         my $base = shift;
1892         my $path = shift || return undef;
1893         my $type = shift;
1894
1895         $path =~ s,/+$,,;
1896
1897         open my $fd, "-|", git_cmd(), "ls-tree", $base, "--", $path
1898                 or die_error(500, "Open git-ls-tree failed");
1899         my $line = <$fd>;
1900         close $fd or return undef;
1901
1902         if (!defined $line) {
1903                 # there is no tree or hash given by $path at $base
1904                 return undef;
1905         }
1906
1907         #'100644 blob 0fa3f3a66fb6a137f6ec2c19351ed4d807070ffa  panic.c'
1908         $line =~ m/^([0-9]+) (.+) ([0-9a-fA-F]{40})\t/;
1909         if (defined $type && $type ne $2) {
1910                 # type doesn't match
1911                 return undef;
1912         }
1913         return $3;
1914 }
1915
1916 # get path of entry with given hash at given tree-ish (ref)
1917 # used to get 'from' filename for combined diff (merge commit) for renames
1918 sub git_get_path_by_hash {
1919         my $base = shift || return;
1920         my $hash = shift || return;
1921
1922         local $/ = "\0";
1923
1924         open my $fd, "-|", git_cmd(), "ls-tree", '-r', '-t', '-z', $base
1925                 or return undef;
1926         while (my $line = <$fd>) {
1927                 chomp $line;
1928
1929                 #'040000 tree 595596a6a9117ddba9fe379b6b012b558bac8423  gitweb'
1930                 #'100644 blob e02e90f0429be0d2a69b76571101f20b8f75530f  gitweb/README'
1931                 if ($line =~ m/(?:[0-9]+) (?:.+) $hash\t(.+)$/) {
1932                         close $fd;
1933                         return $1;
1934                 }
1935         }
1936         close $fd;
1937         return undef;
1938 }
1939
1940 ## ......................................................................
1941 ## git utility functions, directly accessing git repository
1942
1943 sub git_get_project_description {
1944         my $path = shift;
1945
1946         $git_dir = "$projectroot/$path";
1947         open my $fd, "$git_dir/description"
1948                 or return git_get_project_config('description');
1949         my $descr = <$fd>;
1950         close $fd;
1951         if (defined $descr) {
1952                 chomp $descr;
1953         }
1954         return $descr;
1955 }
1956
1957 sub git_get_project_ctags {
1958         my $path = shift;
1959         my $ctags = {};
1960
1961         $git_dir = "$projectroot/$path";
1962         foreach (<$git_dir/ctags/*>) {
1963                 open CT, $_ or next;
1964                 my $val = <CT>;
1965                 chomp $val;
1966                 close CT;
1967                 my $ctag = $_; $ctag =~ s#.*/##;
1968                 $ctags->{$ctag} = $val;
1969         }
1970         $ctags;
1971 }
1972
1973 sub git_populate_project_tagcloud {
1974         my $ctags = shift;
1975
1976         # First, merge different-cased tags; tags vote on casing
1977         my %ctags_lc;
1978         foreach (keys %$ctags) {
1979                 $ctags_lc{lc $_}->{count} += $ctags->{$_};
1980                 if (not $ctags_lc{lc $_}->{topcount}
1981                     or $ctags_lc{lc $_}->{topcount} < $ctags->{$_}) {
1982                         $ctags_lc{lc $_}->{topcount} = $ctags->{$_};
1983                         $ctags_lc{lc $_}->{topname} = $_;
1984                 }
1985         }
1986
1987         my $cloud;
1988         if (eval { require HTML::TagCloud; 1; }) {
1989                 $cloud = HTML::TagCloud->new;
1990                 foreach (sort keys %ctags_lc) {
1991                         # Pad the title with spaces so that the cloud looks
1992                         # less crammed.
1993                         my $title = $ctags_lc{$_}->{topname};
1994                         $title =~ s/ /&nbsp;/g;
1995                         $title =~ s/^/&nbsp;/g;
1996                         $title =~ s/$/&nbsp;/g;
1997                         $cloud->add($title, $home_link."?by_tag=".$_, $ctags_lc{$_}->{count});
1998                 }
1999         } else {
2000                 $cloud = \%ctags_lc;
2001         }
2002         $cloud;
2003 }
2004
2005 sub git_show_project_tagcloud {
2006         my ($cloud, $count) = @_;
2007         print STDERR ref($cloud)."..\n";
2008         if (ref $cloud eq 'HTML::TagCloud') {
2009                 return $cloud->html_and_css($count);
2010         } else {
2011                 my @tags = sort { $cloud->{$a}->{count} <=> $cloud->{$b}->{count} } keys %$cloud;
2012                 return '<p align="center">' . join (', ', map {
2013                         "<a href=\"$home_link?by_tag=$_\">$cloud->{$_}->{topname}</a>"
2014                 } splice(@tags, 0, $count)) . '</p>';
2015         }
2016 }
2017
2018 sub git_get_project_url_list {
2019         my $path = shift;
2020
2021         $git_dir = "$projectroot/$path";
2022         open my $fd, "$git_dir/cloneurl"
2023                 or return wantarray ?
2024                 @{ config_to_multi(git_get_project_config('url')) } :
2025                    config_to_multi(git_get_project_config('url'));
2026         my @git_project_url_list = map { chomp; $_ } <$fd>;
2027         close $fd;
2028
2029         return wantarray ? @git_project_url_list : \@git_project_url_list;
2030 }
2031
2032 sub git_get_projects_list {
2033         my ($filter) = @_;
2034         my @list;
2035
2036         $filter ||= '';
2037         $filter =~ s/\.git$//;
2038
2039         my ($check_forks) = gitweb_check_feature('forks');
2040
2041         if (-d $projects_list) {
2042                 # search in directory
2043                 my $dir = $projects_list . ($filter ? "/$filter" : '');
2044                 # remove the trailing "/"
2045                 $dir =~ s!/+$!!;
2046                 my $pfxlen = length("$dir");
2047                 my $pfxdepth = ($dir =~ tr!/!!);
2048
2049                 File::Find::find({
2050                         follow_fast => 1, # follow symbolic links
2051                         follow_skip => 2, # ignore duplicates
2052                         dangling_symlinks => 0, # ignore dangling symlinks, silently
2053                         wanted => sub {
2054                                 # skip project-list toplevel, if we get it.
2055                                 return if (m!^[/.]$!);
2056                                 # only directories can be git repositories
2057                                 return unless (-d $_);
2058                                 # don't traverse too deep (Find is super slow on os x)
2059                                 if (($File::Find::name =~ tr!/!!) - $pfxdepth > $project_maxdepth) {
2060                                         $File::Find::prune = 1;
2061                                         return;
2062                                 }
2063
2064                                 my $subdir = substr($File::Find::name, $pfxlen + 1);
2065                                 # we check related file in $projectroot
2066                                 if (check_export_ok("$projectroot/$filter/$subdir")) {
2067                                         push @list, { path => ($filter ? "$filter/" : '') . $subdir };
2068                                         $File::Find::prune = 1;
2069                                 }
2070                         },
2071                 }, "$dir");
2072
2073         } elsif (-f $projects_list) {
2074                 # read from file(url-encoded):
2075                 # 'git%2Fgit.git Linus+Torvalds'
2076                 # 'libs%2Fklibc%2Fklibc.git H.+Peter+Anvin'
2077                 # 'linux%2Fhotplug%2Fudev.git Greg+Kroah-Hartman'
2078                 my %paths;
2079                 open my ($fd), $projects_list or return;
2080         PROJECT:
2081                 while (my $line = <$fd>) {
2082                         chomp $line;
2083                         my ($path, $owner) = split ' ', $line;
2084                         $path = unescape($path);
2085                         $owner = unescape($owner);
2086                         if (!defined $path) {
2087                                 next;
2088                         }
2089                         if ($filter ne '') {
2090                                 # looking for forks;
2091                                 my $pfx = substr($path, 0, length($filter));
2092                                 if ($pfx ne $filter) {
2093                                         next PROJECT;
2094                                 }
2095                                 my $sfx = substr($path, length($filter));
2096                                 if ($sfx !~ /^\/.*\.git$/) {
2097                                         next PROJECT;
2098                                 }
2099                         } elsif ($check_forks) {
2100                         PATH:
2101                                 foreach my $filter (keys %paths) {
2102                                         # looking for forks;
2103                                         my $pfx = substr($path, 0, length($filter));
2104                                         if ($pfx ne $filter) {
2105                                                 next PATH;
2106                                         }
2107                                         my $sfx = substr($path, length($filter));
2108                                         if ($sfx !~ /^\/.*\.git$/) {
2109                                                 next PATH;
2110                                         }
2111                                         # is a fork, don't include it in
2112                                         # the list
2113                                         next PROJECT;
2114                                 }
2115                         }
2116                         if (check_export_ok("$projectroot/$path")) {
2117                                 my $pr = {
2118                                         path => $path,
2119                                         owner => to_utf8($owner),
2120                                 };
2121                                 push @list, $pr;
2122                                 (my $forks_path = $path) =~ s/\.git$//;
2123                                 $paths{$forks_path}++;
2124                         }
2125                 }
2126                 close $fd;
2127         }
2128         return @list;
2129 }
2130
2131 our $gitweb_project_owner = undef;
2132 sub git_get_project_list_from_file {
2133
2134         return if (defined $gitweb_project_owner);
2135
2136         $gitweb_project_owner = {};
2137         # read from file (url-encoded):
2138         # 'git%2Fgit.git Linus+Torvalds'
2139         # 'libs%2Fklibc%2Fklibc.git H.+Peter+Anvin'
2140         # 'linux%2Fhotplug%2Fudev.git Greg+Kroah-Hartman'
2141         if (-f $projects_list) {
2142                 open (my $fd , $projects_list);
2143                 while (my $line = <$fd>) {
2144                         chomp $line;
2145                         my ($pr, $ow) = split ' ', $line;
2146                         $pr = unescape($pr);
2147                         $ow = unescape($ow);
2148                         $gitweb_project_owner->{$pr} = to_utf8($ow);
2149                 }
2150                 close $fd;
2151         }
2152 }
2153
2154 sub git_get_project_owner {
2155         my $project = shift;
2156         my $owner;
2157
2158         return undef unless $project;
2159         $git_dir = "$projectroot/$project";
2160
2161         if (!defined $gitweb_project_owner) {
2162                 git_get_project_list_from_file();
2163         }
2164
2165         if (exists $gitweb_project_owner->{$project}) {
2166                 $owner = $gitweb_project_owner->{$project};
2167         }
2168         if (!defined $owner){
2169                 $owner = git_get_project_config('owner');
2170         }
2171         if (!defined $owner) {
2172                 $owner = get_file_owner("$git_dir");
2173         }
2174
2175         return $owner;
2176 }
2177
2178 sub git_get_last_activity {
2179         my ($path) = @_;
2180         my $fd;
2181
2182         $git_dir = "$projectroot/$path";
2183         open($fd, "-|", git_cmd(), 'for-each-ref',
2184              '--format=%(committer)',
2185              '--sort=-committerdate',
2186              '--count=1',
2187              'refs/heads') or return;
2188         my $most_recent = <$fd>;
2189         close $fd or return;
2190         if (defined $most_recent &&
2191             $most_recent =~ / (\d+) [-+][01]\d\d\d$/) {
2192                 my $timestamp = $1;
2193                 my $age = time - $timestamp;
2194                 return ($age, age_string($age));
2195         }
2196         return (undef, undef);
2197 }
2198
2199 sub git_get_references {
2200         my $type = shift || "";
2201         my %refs;
2202         # 5dc01c595e6c6ec9ccda4f6f69c131c0dd945f8c refs/tags/v2.6.11
2203         # c39ae07f393806ccf406ef966e9a15afc43cc36a refs/tags/v2.6.11^{}
2204         open my $fd, "-|", git_cmd(), "show-ref", "--dereference",
2205                 ($type ? ("--", "refs/$type") : ()) # use -- <pattern> if $type
2206                 or return;
2207
2208         while (my $line = <$fd>) {
2209                 chomp $line;
2210                 if ($line =~ m!^([0-9a-fA-F]{40})\srefs/($type.*)$!) {
2211                         if (defined $refs{$1}) {
2212                                 push @{$refs{$1}}, $2;
2213                         } else {
2214                                 $refs{$1} = [ $2 ];
2215                         }
2216                 }
2217         }
2218         close $fd or return;
2219         return \%refs;
2220 }
2221
2222 sub git_get_rev_name_tags {
2223         my $hash = shift || return undef;
2224
2225         open my $fd, "-|", git_cmd(), "name-rev", "--tags", $hash
2226                 or return;
2227         my $name_rev = <$fd>;
2228         close $fd;
2229
2230         if ($name_rev =~ m|^$hash tags/(.*)$|) {
2231                 return $1;
2232         } else {
2233                 # catches also '$hash undefined' output
2234                 return undef;
2235         }
2236 }
2237
2238 ## ----------------------------------------------------------------------
2239 ## parse to hash functions
2240
2241 sub parse_date {
2242         my $epoch = shift;
2243         my $tz = shift || "-0000";
2244
2245         my %date;
2246         my @months = ("Jan", "Feb", "Mar", "Apr", "May", "Jun", "Jul", "Aug", "Sep", "Oct", "Nov", "Dec");
2247         my @days = ("Sun", "Mon", "Tue", "Wed", "Thu", "Fri", "Sat");
2248         my ($sec, $min, $hour, $mday, $mon, $year, $wday, $yday) = gmtime($epoch);
2249         $date{'hour'} = $hour;
2250         $date{'minute'} = $min;
2251         $date{'mday'} = $mday;
2252         $date{'day'} = $days[$wday];
2253         $date{'month'} = $months[$mon];
2254         $date{'rfc2822'}   = sprintf "%s, %d %s %4d %02d:%02d:%02d +0000",
2255                              $days[$wday], $mday, $months[$mon], 1900+$year, $hour ,$min, $sec;
2256         $date{'mday-time'} = sprintf "%d %s %02d:%02d",
2257                              $mday, $months[$mon], $hour ,$min;
2258         $date{'iso-8601'}  = sprintf "%04d-%02d-%02dT%02d:%02d:%02dZ",
2259                              1900+$year, 1+$mon, $mday, $hour ,$min, $sec;
2260
2261         $tz =~ m/^([+\-][0-9][0-9])([0-9][0-9])$/;
2262         my $local = $epoch + ((int $1 + ($2/60)) * 3600);
2263         ($sec, $min, $hour, $mday, $mon, $year, $wday, $yday) = gmtime($local);
2264         $date{'hour_local'} = $hour;
2265         $date{'minute_local'} = $min;
2266         $date{'tz_local'} = $tz;
2267         $date{'iso-tz'} = sprintf("%04d-%02d-%02d %02d:%02d:%02d %s",
2268                                   1900+$year, $mon+1, $mday,
2269                                   $hour, $min, $sec, $tz);
2270         return %date;
2271 }
2272
2273 sub parse_tag {
2274         my $tag_id = shift;
2275         my %tag;
2276         my @comment;
2277
2278         open my $fd, "-|", git_cmd(), "cat-file", "tag", $tag_id or return;
2279         $tag{'id'} = $tag_id;
2280         while (my $line = <$fd>) {
2281                 chomp $line;
2282                 if ($line =~ m/^object ([0-9a-fA-F]{40})$/) {
2283                         $tag{'object'} = $1;
2284                 } elsif ($line =~ m/^type (.+)$/) {
2285                         $tag{'type'} = $1;
2286                 } elsif ($line =~ m/^tag (.+)$/) {
2287                         $tag{'name'} = $1;
2288                 } elsif ($line =~ m/^tagger (.*) ([0-9]+) (.*)$/) {
2289                         $tag{'author'} = $1;
2290                         $tag{'epoch'} = $2;
2291                         $tag{'tz'} = $3;
2292                 } elsif ($line =~ m/--BEGIN/) {
2293                         push @comment, $line;
2294                         last;
2295                 } elsif ($line eq "") {
2296                         last;
2297                 }
2298         }
2299         push @comment, <$fd>;
2300         $tag{'comment'} = \@comment;
2301         close $fd or return;
2302         if (!defined $tag{'name'}) {
2303                 return
2304         };
2305         return %tag
2306 }
2307
2308 sub parse_commit_text {
2309         my ($commit_text, $withparents) = @_;
2310         my @commit_lines = split '\n', $commit_text;
2311         my %co;
2312
2313         pop @commit_lines; # Remove '\0'
2314
2315         if (! @commit_lines) {
2316                 return;
2317         }
2318
2319         my $header = shift @commit_lines;
2320         if ($header !~ m/^[0-9a-fA-F]{40}/) {
2321                 return;
2322         }
2323         ($co{'id'}, my @parents) = split ' ', $header;
2324         while (my $line = shift @commit_lines) {
2325                 last if $line eq "\n";
2326                 if ($line =~ m/^tree ([0-9a-fA-F]{40})$/) {
2327                         $co{'tree'} = $1;
2328                 } elsif ((!defined $withparents) && ($line =~ m/^parent ([0-9a-fA-F]{40})$/)) {
2329                         push @parents, $1;
2330                 } elsif ($line =~ m/^author (.*) ([0-9]+) (.*)$/) {
2331                         $co{'author'} = $1;
2332                         $co{'author_epoch'} = $2;
2333                         $co{'author_tz'} = $3;
2334                         if ($co{'author'} =~ m/^([^<]+) <([^>]*)>/) {
2335                                 $co{'author_name'}  = $1;
2336                                 $co{'author_email'} = $2;
2337                         } else {
2338                                 $co{'author_name'} = $co{'author'};
2339                         }
2340                 } elsif ($line =~ m/^committer (.*) ([0-9]+) (.*)$/) {
2341                         $co{'committer'} = $1;
2342                         $co{'committer_epoch'} = $2;
2343                         $co{'committer_tz'} = $3;
2344                         $co{'committer_name'} = $co{'committer'};
2345                         if ($co{'committer'} =~ m/^([^<]+) <([^>]*)>/) {
2346                                 $co{'committer_name'}  = $1;
2347                                 $co{'committer_email'} = $2;
2348                         } else {
2349                                 $co{'committer_name'} = $co{'committer'};
2350                         }
2351                 }
2352         }
2353         if (!defined $co{'tree'}) {
2354                 return;
2355         };
2356         $co{'parents'} = \@parents;
2357         $co{'parent'} = $parents[0];
2358
2359         foreach my $title (@commit_lines) {
2360                 $title =~ s/^    //;
2361                 if ($title ne "") {
2362                         $co{'title'} = chop_str($title, 80, 5);
2363                         # remove leading stuff of merges to make the interesting part visible
2364                         if (length($title) > 50) {
2365                                 $title =~ s/^Automatic //;
2366                                 $title =~ s/^merge (of|with) /Merge ... /i;
2367                                 if (length($title) > 50) {
2368                                         $title =~ s/(http|rsync):\/\///;
2369                                 }
2370                                 if (length($title) > 50) {
2371                                         $title =~ s/(master|www|rsync)\.//;
2372                                 }
2373                                 if (length($title) > 50) {
2374                                         $title =~ s/kernel.org:?//;
2375                                 }
2376                                 if (length($title) > 50) {
2377                                         $title =~ s/\/pub\/scm//;
2378                                 }
2379                         }
2380                         $co{'title_short'} = chop_str($title, 50, 5);
2381                         last;
2382                 }
2383         }
2384         if (! defined $co{'title'} || $co{'title'} eq "") {
2385                 $co{'title'} = $co{'title_short'} = '(no commit message)';
2386         }
2387         # remove added spaces
2388         foreach my $line (@commit_lines) {
2389                 $line =~ s/^    //;
2390         }
2391         $co{'comment'} = \@commit_lines;
2392
2393         my $age = time - $co{'committer_epoch'};
2394         $co{'age'} = $age;
2395         $co{'age_string'} = age_string($age);
2396         my ($sec, $min, $hour, $mday, $mon, $year, $wday, $yday) = gmtime($co{'committer_epoch'});
2397         if ($age > 60*60*24*7*2) {
2398                 $co{'age_string_date'} = sprintf "%4i-%02u-%02i", 1900 + $year, $mon+1, $mday;
2399                 $co{'age_string_age'} = $co{'age_string'};
2400         } else {
2401                 $co{'age_string_date'} = $co{'age_string'};
2402                 $co{'age_string_age'} = sprintf "%4i-%02u-%02i", 1900 + $year, $mon+1, $mday;
2403         }
2404         return %co;
2405 }
2406
2407 sub parse_commit {
2408         my ($commit_id) = @_;
2409         my %co;
2410
2411         local $/ = "\0";
2412
2413         open my $fd, "-|", git_cmd(), "rev-list",
2414                 "--parents",
2415                 "--header",
2416                 "--max-count=1",
2417                 $commit_id,
2418                 "--",
2419                 or die_error(500, "Open git-rev-list failed");
2420         %co = parse_commit_text(<$fd>, 1);
2421         close $fd;
2422
2423         return %co;
2424 }
2425
2426 sub parse_commits {
2427         my ($commit_id, $maxcount, $skip, $filename, @args) = @_;
2428         my @cos;
2429
2430         $maxcount ||= 1;
2431         $skip ||= 0;
2432
2433         local $/ = "\0";
2434
2435         open my $fd, "-|", git_cmd(), "rev-list",
2436                 "--header",
2437                 @args,
2438                 ("--max-count=" . $maxcount),
2439                 ("--skip=" . $skip),
2440                 @extra_options,
2441                 $commit_id,
2442                 "--",
2443                 ($filename ? ($filename) : ())
2444                 or die_error(500, "Open git-rev-list failed");
2445         while (my $line = <$fd>) {
2446                 my %co = parse_commit_text($line);
2447                 push @cos, \%co;
2448         }
2449         close $fd;
2450
2451         return wantarray ? @cos : \@cos;
2452 }
2453
2454 # parse line of git-diff-tree "raw" output
2455 sub parse_difftree_raw_line {
2456         my $line = shift;
2457         my %res;
2458
2459         # ':100644 100644 03b218260e99b78c6df0ed378e59ed9205ccc96d 3b93d5e7cc7f7dd4ebed13a5cc1a4ad976fc94d8 M   ls-files.c'
2460         # ':100644 100644 7f9281985086971d3877aca27704f2aaf9c448ce bc190ebc71bbd923f2b728e505408f5e54bd073a M   rev-tree.c'
2461         if ($line =~ m/^:([0-7]{6}) ([0-7]{6}) ([0-9a-fA-F]{40}) ([0-9a-fA-F]{40}) (.)([0-9]{0,3})\t(.*)$/) {
2462                 $res{'from_mode'} = $1;
2463                 $res{'to_mode'} = $2;
2464                 $res{'from_id'} = $3;
2465                 $res{'to_id'} = $4;
2466                 $res{'status'} = $5;
2467                 $res{'similarity'} = $6;
2468                 if ($res{'status'} eq 'R' || $res{'status'} eq 'C') { # renamed or copied
2469                         ($res{'from_file'}, $res{'to_file'}) = map { unquote($_) } split("\t", $7);
2470                 } else {
2471                         $res{'from_file'} = $res{'to_file'} = $res{'file'} = unquote($7);
2472                 }
2473         }
2474         # '::100755 100755 100755 60e79ca1b01bc8b057abe17ddab484699a7f5fdb 94067cc5f73388f33722d52ae02f44692bc07490 94067cc5f73388f33722d52ae02f44692bc07490 MR git-gui/git-gui.sh'
2475         # combined diff (for merge commit)
2476         elsif ($line =~ s/^(::+)((?:[0-7]{6} )+)((?:[0-9a-fA-F]{40} )+)([a-zA-Z]+)\t(.*)$//) {
2477                 $res{'nparents'}  = length($1);
2478                 $res{'from_mode'} = [ split(' ', $2) ];
2479                 $res{'to_mode'} = pop @{$res{'from_mode'}};
2480                 $res{'from_id'} = [ split(' ', $3) ];
2481                 $res{'to_id'} = pop @{$res{'from_id'}};
2482                 $res{'status'} = [ split('', $4) ];
2483                 $res{'to_file'} = unquote($5);
2484         }
2485         # 'c512b523472485aef4fff9e57b229d9d243c967f'
2486         elsif ($line =~ m/^([0-9a-fA-F]{40})$/) {
2487                 $res{'commit'} = $1;
2488         }
2489
2490         return wantarray ? %res : \%res;
2491 }
2492
2493 # wrapper: return parsed line of git-diff-tree "raw" output
2494 # (the argument might be raw line, or parsed info)
2495 sub parsed_difftree_line {
2496         my $line_or_ref = shift;
2497
2498         if (ref($line_or_ref) eq "HASH") {
2499                 # pre-parsed (or generated by hand)
2500                 return $line_or_ref;
2501         } else {
2502                 return parse_difftree_raw_line($line_or_ref);
2503         }
2504 }
2505
2506 # parse line of git-ls-tree output
2507 sub parse_ls_tree_line ($;%) {
2508         my $line = shift;
2509         my %opts = @_;
2510         my %res;
2511
2512         #'100644 blob 0fa3f3a66fb6a137f6ec2c19351ed4d807070ffa  panic.c'
2513         $line =~ m/^([0-9]+) (.+) ([0-9a-fA-F]{40})\t(.+)$/s;
2514
2515         $res{'mode'} = $1;
2516         $res{'type'} = $2;
2517         $res{'hash'} = $3;
2518         if ($opts{'-z'}) {
2519                 $res{'name'} = $4;
2520         } else {
2521                 $res{'name'} = unquote($4);
2522         }
2523
2524         return wantarray ? %res : \%res;
2525 }
2526
2527 # generates _two_ hashes, references to which are passed as 2 and 3 argument
2528 sub parse_from_to_diffinfo {
2529         my ($diffinfo, $from, $to, @parents) = @_;
2530
2531         if ($diffinfo->{'nparents'}) {
2532                 # combined diff
2533                 $from->{'file'} = [];
2534                 $from->{'href'} = [];
2535                 fill_from_file_info($diffinfo, @parents)
2536                         unless exists $diffinfo->{'from_file'};
2537                 for (my $i = 0; $i < $diffinfo->{'nparents'}; $i++) {
2538                         $from->{'file'}[$i] =
2539                                 defined $diffinfo->{'from_file'}[$i] ?
2540                                         $diffinfo->{'from_file'}[$i] :
2541                                         $diffinfo->{'to_file'};
2542                         if ($diffinfo->{'status'}[$i] ne "A") { # not new (added) file
2543                                 $from->{'href'}[$i] = href(action=>"blob",
2544                                                            hash_base=>$parents[$i],
2545                                                            hash=>$diffinfo->{'from_id'}[$i],
2546                                                            file_name=>$from->{'file'}[$i]);
2547                         } else {
2548                                 $from->{'href'}[$i] = undef;
2549                         }
2550                 }
2551         } else {
2552                 # ordinary (not combined) diff
2553                 $from->{'file'} = $diffinfo->{'from_file'};
2554                 if ($diffinfo->{'status'} ne "A") { # not new (added) file
2555                         $from->{'href'} = href(action=>"blob", hash_base=>$hash_parent,
2556                                                hash=>$diffinfo->{'from_id'},
2557                                                file_name=>$from->{'file'});
2558                 } else {
2559                         delete $from->{'href'};
2560                 }
2561         }
2562
2563         $to->{'file'} = $diffinfo->{'to_file'};
2564         if (!is_deleted($diffinfo)) { # file exists in result
2565                 $to->{'href'} = href(action=>"blob", hash_base=>$hash,
2566                                      hash=>$diffinfo->{'to_id'},
2567                                      file_name=>$to->{'file'});
2568         } else {
2569                 delete $to->{'href'};
2570         }
2571 }
2572
2573 ## ......................................................................
2574 ## parse to array of hashes functions
2575
2576 sub git_get_heads_list {
2577         my $limit = shift;
2578         my @headslist;
2579
2580         open my $fd, '-|', git_cmd(), 'for-each-ref',
2581                 ($limit ? '--count='.($limit+1) : ()), '--sort=-committerdate',
2582                 '--format=%(objectname) %(refname) %(subject)%00%(committer)',
2583                 'refs/heads'
2584                 or return;
2585         while (my $line = <$fd>) {
2586                 my %ref_item;
2587
2588                 chomp $line;
2589                 my ($refinfo, $committerinfo) = split(/\0/, $line);
2590                 my ($hash, $name, $title) = split(' ', $refinfo, 3);
2591                 my ($committer, $epoch, $tz) =
2592                         ($committerinfo =~ /^(.*) ([0-9]+) (.*)$/);
2593                 $ref_item{'fullname'}  = $name;
2594                 $name =~ s!^refs/heads/!!;
2595
2596                 $ref_item{'name'}  = $name;
2597                 $ref_item{'id'}    = $hash;
2598                 $ref_item{'title'} = $title || '(no commit message)';
2599                 $ref_item{'epoch'} = $epoch;
2600                 if ($epoch) {
2601                         $ref_item{'age'} = age_string(time - $ref_item{'epoch'});
2602                 } else {
2603                         $ref_item{'age'} = "unknown";
2604                 }
2605
2606                 push @headslist, \%ref_item;
2607         }
2608         close $fd;
2609
2610         return wantarray ? @headslist : \@headslist;
2611 }
2612
2613 sub git_get_tags_list {
2614         my $limit = shift;
2615         my @tagslist;
2616
2617         open my $fd, '-|', git_cmd(), 'for-each-ref',
2618                 ($limit ? '--count='.($limit+1) : ()), '--sort=-creatordate',
2619                 '--format=%(objectname) %(objecttype) %(refname) '.
2620                 '%(*objectname) %(*objecttype) %(subject)%00%(creator)',
2621                 'refs/tags'
2622                 or return;
2623         while (my $line = <$fd>) {
2624                 my %ref_item;
2625
2626                 chomp $line;
2627                 my ($refinfo, $creatorinfo) = split(/\0/, $line);
2628                 my ($id, $type, $name, $refid, $reftype, $title) = split(' ', $refinfo, 6);
2629                 my ($creator, $epoch, $tz) =
2630                         ($creatorinfo =~ /^(.*) ([0-9]+) (.*)$/);
2631                 $ref_item{'fullname'} = $name;
2632                 $name =~ s!^refs/tags/!!;
2633
2634                 $ref_item{'type'} = $type;
2635                 $ref_item{'id'} = $id;
2636                 $ref_item{'name'} = $name;
2637                 if ($type eq "tag") {
2638                         $ref_item{'subject'} = $title;
2639                         $ref_item{'reftype'} = $reftype;
2640                         $ref_item{'refid'}   = $refid;
2641                 } else {
2642                         $ref_item{'reftype'} = $type;
2643                         $ref_item{'refid'}   = $id;
2644                 }
2645
2646                 if ($type eq "tag" || $type eq "commit") {
2647                         $ref_item{'epoch'} = $epoch;
2648                         if ($epoch) {
2649                                 $ref_item{'age'} = age_string(time - $ref_item{'epoch'});
2650                         } else {
2651                                 $ref_item{'age'} = "unknown";
2652                         }
2653                 }
2654
2655                 push @tagslist, \%ref_item;
2656         }
2657         close $fd;
2658
2659         return wantarray ? @tagslist : \@tagslist;
2660 }
2661
2662 ## ----------------------------------------------------------------------
2663 ## filesystem-related functions
2664
2665 sub get_file_owner {
2666         my $path = shift;
2667
2668         my ($dev, $ino, $mode, $nlink, $st_uid, $st_gid, $rdev, $size) = stat($path);
2669         my ($name, $passwd, $uid, $gid, $quota, $comment, $gcos, $dir, $shell) = getpwuid($st_uid);
2670         if (!defined $gcos) {
2671                 return undef;
2672         }
2673         my $owner = $gcos;
2674         $owner =~ s/[,;].*$//;
2675         return to_utf8($owner);
2676 }
2677
2678 ## ......................................................................
2679 ## mimetype related functions
2680
2681 sub mimetype_guess_file {
2682         my $filename = shift;
2683         my $mimemap = shift;
2684         -r $mimemap or return undef;
2685
2686         my %mimemap;
2687         open(MIME, $mimemap) or return undef;
2688         while (<MIME>) {
2689                 next if m/^#/; # skip comments
2690                 my ($mime, $exts) = split(/\t+/);
2691                 if (defined $exts) {
2692                         my @exts = split(/\s+/, $exts);
2693                         foreach my $ext (@exts) {
2694                                 $mimemap{$ext} = $mime;
2695                         }
2696                 }
2697         }
2698         close(MIME);
2699
2700         $filename =~ /\.([^.]*)$/;
2701         return $mimemap{$1};
2702 }
2703
2704 sub mimetype_guess {
2705         my $filename = shift;
2706         my $mime;
2707         $filename =~ /\./ or return undef;
2708
2709         if ($mimetypes_file) {
2710                 my $file = $mimetypes_file;
2711                 if ($file !~ m!^/!) { # if it is relative path
2712                         # it is relative to project
2713                         $file = "$projectroot/$project/$file";
2714                 }
2715                 $mime = mimetype_guess_file($filename, $file);
2716         }
2717         $mime ||= mimetype_guess_file($filename, '/etc/mime.types');
2718         return $mime;
2719 }
2720
2721 sub blob_mimetype {
2722         my $fd = shift;
2723         my $filename = shift;
2724
2725         if ($filename) {
2726                 my $mime = mimetype_guess($filename);
2727                 $mime and return $mime;
2728         }
2729
2730         # just in case
2731         return $default_blob_plain_mimetype unless $fd;
2732
2733         if (-T $fd) {
2734                 return 'text/plain';
2735         } elsif (! $filename) {
2736                 return 'application/octet-stream';
2737         } elsif ($filename =~ m/\.png$/i) {
2738                 return 'image/png';
2739         } elsif ($filename =~ m/\.gif$/i) {
2740                 return 'image/gif';
2741         } elsif ($filename =~ m/\.jpe?g$/i) {
2742                 return 'image/jpeg';
2743         } else {
2744                 return 'application/octet-stream';
2745         }
2746 }
2747
2748 sub blob_contenttype {
2749         my ($fd, $file_name, $type) = @_;
2750
2751         $type ||= blob_mimetype($fd, $file_name);
2752         if ($type eq 'text/plain' && defined $default_text_plain_charset) {
2753                 $type .= "; charset=$default_text_plain_charset";
2754         }
2755
2756         return $type;
2757 }
2758
2759 ## ======================================================================
2760 ## functions printing HTML: header, footer, error page
2761
2762 sub git_header_html {
2763         my $status = shift || "200 OK";
2764         my $expires = shift;
2765
2766         my $title = "$site_name";
2767         if (defined $project) {
2768                 $title .= " - " . to_utf8($project);
2769                 if (defined $action) {
2770                         $title .= "/$action";
2771                         if (defined $file_name) {
2772                                 $title .= " - " . esc_path($file_name);
2773                                 if ($action eq "tree" && $file_name !~ m|/$|) {
2774                                         $title .= "/";
2775                                 }
2776                         }
2777                 }
2778         }
2779         my $content_type;
2780         # require explicit support from the UA if we are to send the page as
2781         # 'application/xhtml+xml', otherwise send it as plain old 'text/html'.
2782         # we have to do this because MSIE sometimes globs '*/*', pretending to
2783         # support xhtml+xml but choking when it gets what it asked for.
2784         if (defined $cgi->http('HTTP_ACCEPT') &&
2785             $cgi->http('HTTP_ACCEPT') =~ m/(,|;|\s|^)application\/xhtml\+xml(,|;|\s|$)/ &&
2786             $cgi->Accept('application/xhtml+xml') != 0) {
2787                 $content_type = 'application/xhtml+xml';
2788         } else {
2789                 $content_type = 'text/html';
2790         }
2791         print $cgi->header(-type=>$content_type, -charset => 'utf-8',
2792                            -status=> $status, -expires => $expires);
2793         my $mod_perl_version = $ENV{'MOD_PERL'} ? " $ENV{'MOD_PERL'}" : '';
2794         print <<EOF;
2795 <?xml version="1.0" encoding="utf-8"?>
2796 <!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Strict//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-strict.dtd">
2797 <html xmlns="http://www.w3.org/1999/xhtml" xml:lang="en-US" lang="en-US">
2798 <!-- git web interface version $version, (C) 2005-2006, Kay Sievers <kay.sievers\@vrfy.org>, Christian Gierke -->
2799 <!-- git core binaries version $git_version -->
2800 <head>
2801 <meta http-equiv="content-type" content="$content_type; charset=utf-8"/>
2802 <meta name="generator" content="gitweb/$version git/$git_version$mod_perl_version"/>
2803 <meta name="robots" content="index, nofollow"/>
2804 <title>$title</title>
2805 EOF
2806 # print out each stylesheet that exist
2807         if (defined $stylesheet) {
2808 #provides backwards capability for those people who define style sheet in a config file
2809                 print '<link rel="stylesheet" type="text/css" href="'.$stylesheet.'"/>'."\n";
2810         } else {
2811                 foreach my $stylesheet (@stylesheets) {
2812                         next unless $stylesheet;
2813                         print '<link rel="stylesheet" type="text/css" href="'.$stylesheet.'"/>'."\n";
2814                 }
2815         }
2816         if (defined $project) {
2817                 my %href_params = get_feed_info();
2818                 if (!exists $href_params{'-title'}) {
2819                         $href_params{'-title'} = 'log';
2820                 }
2821
2822                 foreach my $format qw(RSS Atom) {
2823                         my $type = lc($format);
2824                         my %link_attr = (
2825                                 '-rel' => 'alternate',
2826                                 '-title' => "$project - $href_params{'-title'} - $format feed",
2827                                 '-type' => "application/$type+xml"
2828                         );
2829
2830                         $href_params{'action'} = $type;
2831                         $link_attr{'-href'} = href(%href_params);
2832                         print "<link ".
2833                               "rel=\"$link_attr{'-rel'}\" ".
2834                               "title=\"$link_attr{'-title'}\" ".
2835                               "href=\"$link_attr{'-href'}\" ".
2836                               "type=\"$link_attr{'-type'}\" ".
2837                               "/>\n";
2838
2839                         $href_params{'extra_options'} = '--no-merges';
2840                         $link_attr{'-href'} = href(%href_params);
2841                         $link_attr{'-title'} .= ' (no merges)';
2842                         print "<link ".
2843                               "rel=\"$link_attr{'-rel'}\" ".
2844                               "title=\"$link_attr{'-title'}\" ".
2845                               "href=\"$link_attr{'-href'}\" ".
2846                               "type=\"$link_attr{'-type'}\" ".
2847                               "/>\n";
2848                 }
2849
2850         } else {
2851                 printf('<link rel="alternate" title="%s projects list" '.
2852                        'href="%s" type="text/plain; charset=utf-8" />'."\n",
2853                        $site_name, href(project=>undef, action=>"project_index"));
2854                 printf('<link rel="alternate" title="%s projects feeds" '.
2855                        'href="%s" type="text/x-opml" />'."\n",
2856                        $site_name, href(project=>undef, action=>"opml"));
2857         }
2858         if (defined $favicon) {
2859                 print qq(<link rel="shortcut icon" href="$favicon" type="image/png" />\n);
2860         }
2861
2862         print "</head>\n" .
2863               "<body>\n";
2864
2865         if (-f $site_header) {
2866                 open (my $fd, $site_header);
2867                 print <$fd>;
2868                 close $fd;
2869         }
2870
2871         print "<div class=\"page_header\">\n" .
2872               $cgi->a({-href => esc_url($logo_url),
2873                        -title => $logo_label},
2874                       qq(<img src="$logo" width="72" height="27" alt="git" class="logo"/>));
2875         print $cgi->a({-href => esc_url($home_link)}, $home_link_str) . " / ";
2876         if (defined $project) {
2877                 print $cgi->a({-href => href(action=>"summary")}, esc_html($project));
2878                 if (defined $action) {
2879                         print " / $action";
2880                 }
2881                 print "\n";
2882         }
2883         print "</div>\n";
2884
2885         my ($have_search) = gitweb_check_feature('search');
2886         if (defined $project && $have_search) {
2887                 if (!defined $searchtext) {
2888                         $searchtext = "";
2889                 }
2890                 my $search_hash;
2891                 if (defined $hash_base) {
2892                         $search_hash = $hash_base;
2893                 } elsif (defined $hash) {
2894                         $search_hash = $hash;
2895                 } else {
2896                         $search_hash = "HEAD";
2897                 }
2898                 my $action = $my_uri;
2899                 my ($use_pathinfo) = gitweb_check_feature('pathinfo');
2900                 if ($use_pathinfo) {
2901                         $action .= "/".esc_url($project);
2902                 }
2903                 print $cgi->startform(-method => "get", -action => $action) .
2904                       "<div class=\"search\">\n" .
2905                       (!$use_pathinfo &&
2906                       $cgi->input({-name=>"p", -value=>$project, -type=>"hidden"}) . "\n") .
2907                       $cgi->input({-name=>"a", -value=>"search", -type=>"hidden"}) . "\n" .
2908                       $cgi->input({-name=>"h", -value=>$search_hash, -type=>"hidden"}) . "\n" .
2909                       $cgi->popup_menu(-name => 'st', -default => 'commit',
2910                                        -values => ['commit', 'grep', 'author', 'committer', 'pickaxe']) .
2911                       $cgi->sup($cgi->a({-href => href(action=>"search_help")}, "?")) .
2912                       " search:\n",
2913                       $cgi->textfield(-name => "s", -value => $searchtext) . "\n" .
2914                       "<span title=\"Extended regular expression\">" .
2915                       $cgi->checkbox(-name => 'sr', -value => 1, -label => 're',
2916                                      -checked => $search_use_regexp) .
2917                       "</span>" .
2918                       "</div>" .
2919                       $cgi->end_form() . "\n";
2920         }
2921 }
2922
2923 sub git_footer_html {
2924         my $feed_class = 'rss_logo';
2925
2926         print "<div class=\"page_footer\">\n";
2927         if (defined $project) {
2928                 my $descr = git_get_project_description($project);
2929                 if (defined $descr) {
2930                         print "<div class=\"page_footer_text\">" . esc_html($descr) . "</div>\n";
2931                 }
2932
2933                 my %href_params = get_feed_info();
2934                 if (!%href_params) {
2935                         $feed_class .= ' generic';
2936                 }
2937                 $href_params{'-title'} ||= 'log';
2938
2939                 foreach my $format qw(RSS Atom) {
2940                         $href_params{'action'} = lc($format);
2941                         print $cgi->a({-href => href(%href_params),
2942                                       -title => "$href_params{'-title'} $format feed",
2943                                       -class => $feed_class}, $format)."\n";
2944                 }
2945
2946         } else {
2947                 print $cgi->a({-href => href(project=>undef, action=>"opml"),
2948                               -class => $feed_class}, "OPML") . " ";
2949                 print $cgi->a({-href => href(project=>undef, action=>"project_index"),
2950                               -class => $feed_class}, "TXT") . "\n";
2951         }
2952         print "</div>\n"; # class="page_footer"
2953
2954         if (-f $site_footer) {
2955                 open (my $fd, $site_footer);
2956                 print <$fd>;
2957                 close $fd;
2958         }
2959
2960         print "</body>\n" .
2961               "</html>";
2962 }
2963
2964 # die_error(<http_status_code>, <error_message>)
2965 # Example: die_error(404, 'Hash not found')
2966 # By convention, use the following status codes (as defined in RFC 2616):
2967 # 400: Invalid or missing CGI parameters, or
2968 #      requested object exists but has wrong type.
2969 # 403: Requested feature (like "pickaxe" or "snapshot") not enabled on
2970 #      this server or project.
2971 # 404: Requested object/revision/project doesn't exist.
2972 # 500: The server isn't configured properly, or
2973 #      an internal error occurred (e.g. failed assertions caused by bugs), or
2974 #      an unknown error occurred (e.g. the git binary died unexpectedly).
2975 sub die_error {
2976         my $status = shift || 500;
2977         my $error = shift || "Internal server error";
2978
2979         my %http_responses = (400 => '400 Bad Request',
2980                               403 => '403 Forbidden',
2981                               404 => '404 Not Found',
2982                               500 => '500 Internal Server Error');
2983         git_header_html($http_responses{$status});
2984         print <<EOF;
2985 <div class="page_body">
2986 <br /><br />
2987 $status - $error
2988 <br />
2989 </div>
2990 EOF
2991         git_footer_html();
2992         exit;
2993 }
2994
2995 ## ----------------------------------------------------------------------
2996 ## functions printing or outputting HTML: navigation
2997
2998 sub git_print_page_nav {
2999         my ($current, $suppress, $head, $treehead, $treebase, $extra) = @_;
3000         $extra = '' if !defined $extra; # pager or formats
3001
3002         my @navs = qw(summary shortlog log commit commitdiff tree);
3003         if ($suppress) {
3004                 @navs = grep { $_ ne $suppress } @navs;
3005         }
3006
3007         my %arg = map { $_ => {action=>$_} } @navs;
3008         if (defined $head) {
3009                 for (qw(commit commitdiff)) {
3010                         $arg{$_}{'hash'} = $head;
3011                 }
3012                 if ($current =~ m/^(tree | log | shortlog | commit | commitdiff | search)$/x) {
3013                         for (qw(shortlog log)) {
3014                                 $arg{$_}{'hash'} = $head;
3015                         }
3016                 }
3017         }
3018
3019         $arg{'tree'}{'hash'} = $treehead if defined $treehead;
3020         $arg{'tree'}{'hash_base'} = $treebase if defined $treebase;
3021
3022         my @actions = gitweb_check_feature('actions');
3023         while (@actions) {
3024                 my ($label, $link, $pos) = (shift(@actions), shift(@actions), shift(@actions));
3025                 @navs = map { $_ eq $pos ? ($_, $label) : $_ } @navs;
3026                 # munch munch
3027                 $link =~ s#%n#$project#g;
3028                 $link =~ s#%f#$git_dir#g;
3029                 $treehead ? $link =~ s#%h#$treehead#g : $link =~ s#%h##g;
3030                 $treebase ? $link =~ s#%b#$treebase#g : $link =~ s#%b##g;
3031                 $arg{$label}{'_href'} = $link;
3032         }
3033
3034         print "<div class=\"page_nav\">\n" .
3035                 (join " | ",
3036                  map { $_ eq $current ?
3037                        $_ : $cgi->a({-href => ($arg{$_}{_href} ? $arg{$_}{_href} : href(%{$arg{$_}}))}, "$_")
3038                  } @navs);
3039         print "<br/>\n$extra<br/>\n" .
3040               "</div>\n";
3041 }
3042
3043 sub format_paging_nav {
3044         my ($action, $hash, $head, $page, $has_next_link) = @_;
3045         my $paging_nav;
3046
3047
3048         if ($hash ne $head || $page) {
3049                 $paging_nav .= $cgi->a({-href => href(action=>$action)}, "HEAD");
3050         } else {
3051                 $paging_nav .= "HEAD";
3052         }
3053
3054         if ($page > 0) {
3055                 $paging_nav .= " &sdot; " .
3056                         $cgi->a({-href => href(-replay=>1, page=>$page-1),
3057                                  -accesskey => "p", -title => "Alt-p"}, "prev");
3058         } else {
3059                 $paging_nav .= " &sdot; prev";
3060         }
3061
3062         if ($has_next_link) {
3063                 $paging_nav .= " &sdot; " .
3064                         $cgi->a({-href => href(-replay=>1, page=>$page+1),
3065                                  -accesskey => "n", -title => "Alt-n"}, "next");
3066         } else {
3067                 $paging_nav .= " &sdot; next";
3068         }
3069
3070         return $paging_nav;
3071 }
3072
3073 ## ......................................................................
3074 ## functions printing or outputting HTML: div
3075
3076 sub git_print_header_div {
3077         my ($action, $title, $hash, $hash_base) = @_;
3078         my %args = ();
3079
3080         $args{'action'} = $action;
3081         $args{'hash'} = $hash if $hash;
3082         $args{'hash_base'} = $hash_base if $hash_base;
3083
3084         print "<div class=\"header\">\n" .
3085               $cgi->a({-href => href(%args), -class => "title"},
3086               $title ? $title : $action) .
3087               "\n</div>\n";
3088 }
3089
3090 #sub git_print_authorship (\%) {
3091 sub git_print_authorship {
3092         my $co = shift;
3093
3094         my %ad = parse_date($co->{'author_epoch'}, $co->{'author_tz'});
3095         print "<div class=\"author_date\">" .
3096               esc_html($co->{'author_name'}) .
3097               " [$ad{'rfc2822'}";
3098         if ($ad{'hour_local'} < 6) {
3099                 printf(" (<span class=\"atnight\">%02d:%02d</span> %s)",
3100                        $ad{'hour_local'}, $ad{'minute_local'}, $ad{'tz_local'});
3101         } else {
3102                 printf(" (%02d:%02d %s)",
3103                        $ad{'hour_local'}, $ad{'minute_local'}, $ad{'tz_local'});
3104         }
3105         print "]</div>\n";
3106 }
3107
3108 sub git_print_page_path {
3109         my $name = shift;
3110         my $type = shift;
3111         my $hb = shift;
3112
3113
3114         print "<div class=\"page_path\">";
3115         print $cgi->a({-href => href(action=>"tree", hash_base=>$hb),
3116                       -title => 'tree root'}, to_utf8("[$project]"));
3117         print " / ";
3118         if (defined $name) {
3119                 my @dirname = split '/', $name;
3120                 my $basename = pop @dirname;
3121                 my $fullname = '';
3122
3123                 foreach my $dir (@dirname) {
3124                         $fullname .= ($fullname ? '/' : '') . $dir;
3125                         print $cgi->a({-href => href(action=>"tree", file_name=>$fullname,
3126                                                      hash_base=>$hb),
3127                                       -title => $fullname}, esc_path($dir));
3128                         print " / ";
3129                 }
3130                 if (defined $type && $type eq 'blob') {
3131                         print $cgi->a({-href => href(action=>"blob_plain", file_name=>$file_name,
3132                                                      hash_base=>$hb),
3133                                       -title => $name}, esc_path($basename));
3134                 } elsif (defined $type && $type eq 'tree') {
3135                         print $cgi->a({-href => href(action=>"tree", file_name=>$file_name,
3136                                                      hash_base=>$hb),
3137                                       -title => $name}, esc_path($basename));
3138                         print " / ";
3139                 } else {
3140                         print esc_path($basename);
3141                 }
3142         }
3143         print "<br/></div>\n";
3144 }
3145
3146 # sub git_print_log (\@;%) {
3147 sub git_print_log ($;%) {
3148         my $log = shift;
3149         my %opts = @_;
3150
3151         if ($opts{'-remove_title'}) {
3152                 # remove title, i.e. first line of log
3153                 shift @$log;
3154         }
3155         # remove leading empty lines
3156         while (defined $log->[0] && $log->[0] eq "") {
3157                 shift @$log;
3158         }
3159
3160         # print log
3161         my $signoff = 0;
3162         my $empty = 0;
3163         foreach my $line (@$log) {
3164                 if ($line =~ m/^ *(signed[ \-]off[ \-]by[ :]|acked[ \-]by[ :]|cc[ :])/i) {
3165                         $signoff = 1;
3166                         $empty = 0;
3167                         if (! $opts{'-remove_signoff'}) {
3168                                 print "<span class=\"signoff\">" . esc_html($line) . "</span><br/>\n";
3169                                 next;
3170                         } else {
3171                                 # remove signoff lines
3172                                 next;
3173                         }
3174                 } else {
3175                         $signoff = 0;
3176                 }
3177
3178                 # print only one empty line
3179                 # do not print empty line after signoff
3180                 if ($line eq "") {
3181                         next if ($empty || $signoff);
3182                         $empty = 1;
3183                 } else {
3184                         $empty = 0;
3185                 }
3186
3187                 print format_log_line_html($line) . "<br/>\n";
3188         }
3189
3190         if ($opts{'-final_empty_line'}) {
3191                 # end with single empty line
3192                 print "<br/>\n" unless $empty;
3193         }
3194 }
3195
3196 # return link target (what link points to)
3197 sub git_get_link_target {
3198         my $hash = shift;
3199         my $link_target;
3200
3201         # read link
3202         open my $fd, "-|", git_cmd(), "cat-file", "blob", $hash
3203                 or return;
3204         {
3205                 local $/;
3206                 $link_target = <$fd>;
3207         }
3208         close $fd
3209                 or return;
3210
3211         return $link_target;
3212 }
3213
3214 # given link target, and the directory (basedir) the link is in,
3215 # return target of link relative to top directory (top tree);
3216 # return undef if it is not possible (including absolute links).
3217 sub normalize_link_target {
3218         my ($link_target, $basedir, $hash_base) = @_;
3219
3220         # we can normalize symlink target only if $hash_base is provided
3221         return unless $hash_base;
3222
3223         # absolute symlinks (beginning with '/') cannot be normalized
3224         return if (substr($link_target, 0, 1) eq '/');
3225
3226         # normalize link target to path from top (root) tree (dir)
3227         my $path;
3228         if ($basedir) {
3229                 $path = $basedir . '/' . $link_target;
3230         } else {
3231                 # we are in top (root) tree (dir)
3232                 $path = $link_target;
3233         }
3234
3235         # remove //, /./, and /../
3236         my @path_parts;
3237         foreach my $part (split('/', $path)) {
3238                 # discard '.' and ''
3239                 next if (!$part || $part eq '.');
3240                 # handle '..'
3241                 if ($part eq '..') {
3242                         if (@path_parts) {
3243                                 pop @path_parts;
3244                         } else {
3245                                 # link leads outside repository (outside top dir)
3246                                 return;
3247                         }
3248                 } else {
3249                         push @path_parts, $part;
3250                 }
3251         }
3252         $path = join('/', @path_parts);
3253
3254         return $path;
3255 }
3256
3257 # print tree entry (row of git_tree), but without encompassing <tr> element
3258 sub git_print_tree_entry {
3259         my ($t, $basedir, $hash_base, $have_blame) = @_;
3260
3261         my %base_key = ();
3262         $base_key{'hash_base'} = $hash_base if defined $hash_base;
3263
3264         # The format of a table row is: mode list link.  Where mode is
3265         # the mode of the entry, list is the name of the entry, an href,
3266         # and link is the action links of the entry.
3267
3268         print "<td class=\"mode\">" . mode_str($t->{'mode'}) . "</td>\n";
3269         if ($t->{'type'} eq "blob") {
3270                 print "<td class=\"list\">" .
3271                         $cgi->a({-href => href(action=>"blob", hash=>$t->{'hash'},
3272                                                file_name=>"$basedir$t->{'name'}", %base_key),
3273                                 -class => "list"}, esc_path($t->{'name'}));
3274                 if (S_ISLNK(oct $t->{'mode'})) {
3275                         my $link_target = git_get_link_target($t->{'hash'});
3276                         if ($link_target) {
3277                                 my $norm_target = normalize_link_target($link_target, $basedir, $hash_base);
3278                                 if (defined $norm_target) {
3279                                         print " -> " .
3280                                               $cgi->a({-href => href(action=>"object", hash_base=>$hash_base,
3281                                                                      file_name=>$norm_target),
3282                                                        -title => $norm_target}, esc_path($link_target));
3283                                 } else {
3284                                         print " -> " . esc_path($link_target);
3285                                 }
3286                         }
3287                 }
3288                 print "</td>\n";
3289                 print "<td class=\"link\">";
3290                 print $cgi->a({-href => href(action=>"blob", hash=>$t->{'hash'},
3291                                              file_name=>"$basedir$t->{'name'}", %base_key)},
3292                               "blob");
3293                 if ($have_blame) {
3294                         print " | " .
3295                               $cgi->a({-href => href(action=>"blame", hash=>$t->{'hash'},
3296                                                      file_name=>"$basedir$t->{'name'}", %base_key)},
3297                                       "blame");
3298                 }
3299                 if (defined $hash_base) {
3300                         print " | " .
3301                               $cgi->a({-href => href(action=>"history", hash_base=>$hash_base,
3302                                                      hash=>$t->{'hash'}, file_name=>"$basedir$t->{'name'}")},
3303                                       "history");
3304                 }
3305                 print " | " .
3306                         $cgi->a({-href => href(action=>"blob_plain", hash_base=>$hash_base,
3307                                                file_name=>"$basedir$t->{'name'}")},
3308                                 "raw");
3309                 print "</td>\n";
3310
3311         } elsif ($t->{'type'} eq "tree") {
3312                 print "<td class=\"list\">";
3313                 print $cgi->a({-href => href(action=>"tree", hash=>$t->{'hash'},
3314                                              file_name=>"$basedir$t->{'name'}", %base_key)},
3315                               esc_path($t->{'name'}));
3316                 print "</td>\n";
3317                 print "<td class=\"link\">";
3318                 print $cgi->a({-href => href(action=>"tree", hash=>$t->{'hash'},
3319                                              file_name=>"$basedir$t->{'name'}", %base_key)},
3320                               "tree");
3321                 if (defined $hash_base) {
3322                         print " | " .
3323                               $cgi->a({-href => href(action=>"history", hash_base=>$hash_base,
3324                                                      file_name=>"$basedir$t->{'name'}")},
3325                                       "history");
3326                 }
3327                 print "</td>\n";
3328         } else {
3329                 # unknown object: we can only present history for it
3330                 # (this includes 'commit' object, i.e. submodule support)
3331                 print "<td class=\"list\">" .
3332                       esc_path($t->{'name'}) .
3333                       "</td>\n";
3334                 print "<td class=\"link\">";
3335                 if (defined $hash_base) {
3336                         print $cgi->a({-href => href(action=>"history",
3337                                                      hash_base=>$hash_base,
3338                                                      file_name=>"$basedir$t->{'name'}")},
3339                                       "history");
3340                 }
3341                 print "</td>\n";
3342         }
3343 }
3344
3345 ## ......................................................................
3346 ## functions printing large fragments of HTML
3347
3348 # get pre-image filenames for merge (combined) diff
3349 sub fill_from_file_info {
3350         my ($diff, @parents) = @_;
3351
3352         $diff->{'from_file'} = [ ];
3353         $diff->{'from_file'}[$diff->{'nparents'} - 1] = undef;
3354         for (my $i = 0; $i < $diff->{'nparents'}; $i++) {
3355                 if ($diff->{'status'}[$i] eq 'R' ||
3356                     $diff->{'status'}[$i] eq 'C') {
3357                         $diff->{'from_file'}[$i] =
3358                                 git_get_path_by_hash($parents[$i], $diff->{'from_id'}[$i]);
3359                 }
3360         }
3361
3362         return $diff;
3363 }
3364
3365 # is current raw difftree line of file deletion
3366 sub is_deleted {
3367         my $diffinfo = shift;
3368
3369         return $diffinfo->{'to_id'} eq ('0' x 40);
3370 }
3371
3372 # does patch correspond to [previous] difftree raw line
3373 # $diffinfo  - hashref of parsed raw diff format
3374 # $patchinfo - hashref of parsed patch diff format
3375 #              (the same keys as in $diffinfo)
3376 sub is_patch_split {
3377         my ($diffinfo, $patchinfo) = @_;
3378
3379         return defined $diffinfo && defined $patchinfo
3380                 && $diffinfo->{'to_file'} eq $patchinfo->{'to_file'};
3381 }
3382
3383
3384 sub git_difftree_body {
3385         my ($difftree, $hash, @parents) = @_;
3386         my ($parent) = $parents[0];
3387         my ($have_blame) = gitweb_check_feature('blame');
3388         print "<div class=\"list_head\">\n";
3389         if ($#{$difftree} > 10) {
3390                 print(($#{$difftree} + 1) . " files changed:\n");
3391         }
3392         print "</div>\n";
3393
3394         print "<table class=\"" .
3395               (@parents > 1 ? "combined " : "") .
3396               "diff_tree\">\n";
3397
3398         # header only for combined diff in 'commitdiff' view
3399         my $has_header = @$difftree && @parents > 1 && $action eq 'commitdiff';
3400         if ($has_header) {
3401                 # table header
3402                 print "<thead><tr>\n" .
3403                        "<th></th><th></th>\n"; # filename, patchN link
3404                 for (my $i = 0; $i < @parents; $i++) {
3405                         my $par = $parents[$i];
3406                         print "<th>" .
3407                               $cgi->a({-href => href(action=>"commitdiff",
3408                                                      hash=>$hash, hash_parent=>$par),
3409                                        -title => 'commitdiff to parent number ' .
3410                                                   ($i+1) . ': ' . substr($par,0,7)},
3411                                       $i+1) .
3412                               "&nbsp;</th>\n";
3413                 }
3414                 print "</tr></thead>\n<tbody>\n";
3415         }
3416
3417         my $alternate = 1;
3418         my $patchno = 0;
3419         foreach my $line (@{$difftree}) {
3420                 my $diff = parsed_difftree_line($line);
3421
3422                 if ($alternate) {
3423                         print "<tr class=\"dark\">\n";
3424                 } else {
3425                         print "<tr class=\"light\">\n";
3426                 }
3427                 $alternate ^= 1;
3428
3429                 if (exists $diff->{'nparents'}) { # combined diff
3430
3431                         fill_from_file_info($diff, @parents)
3432                                 unless exists $diff->{'from_file'};
3433
3434                         if (!is_deleted($diff)) {
3435                                 # file exists in the result (child) commit
3436                                 print "<td>" .
3437                                       $cgi->a({-href => href(action=>"blob", hash=>$diff->{'to_id'},
3438                                                              file_name=>$diff->{'to_file'},
3439                                                              hash_base=>$hash),
3440                                               -class => "list"}, esc_path($diff->{'to_file'})) .
3441                                       "</td>\n";
3442                         } else {
3443                                 print "<td>" .
3444                                       esc_path($diff->{'to_file'}) .
3445                                       "</td>\n";
3446                         }
3447
3448                         if ($action eq 'commitdiff') {
3449                                 # link to patch
3450                                 $patchno++;
3451                                 print "<td class=\"link\">" .
3452                                       $cgi->a({-href => "#patch$patchno"}, "patch") .
3453                                       " | " .
3454                                       "</td>\n";
3455                         }
3456
3457                         my $has_history = 0;
3458                         my $not_deleted = 0;
3459                         for (my $i = 0; $i < $diff->{'nparents'}; $i++) {
3460                                 my $hash_parent = $parents[$i];
3461                                 my $from_hash = $diff->{'from_id'}[$i];
3462                                 my $from_path = $diff->{'from_file'}[$i];
3463                                 my $status = $diff->{'status'}[$i];
3464
3465                                 $has_history ||= ($status ne 'A');
3466                                 $not_deleted ||= ($status ne 'D');
3467
3468                                 if ($status eq 'A') {
3469                                         print "<td  class=\"link\" align=\"right\"> | </td>\n";
3470                                 } elsif ($status eq 'D') {
3471                                         print "<td class=\"link\">" .
3472                                               $cgi->a({-href => href(action=>"blob",
3473                                                                      hash_base=>$hash,
3474                                                                      hash=>$from_hash,
3475                                                                      file_name=>$from_path)},
3476                                                       "blob" . ($i+1)) .
3477                                               " | </td>\n";
3478                                 } else {
3479                                         if ($diff->{'to_id'} eq $from_hash) {
3480                                                 print "<td class=\"link nochange\">";
3481                                         } else {
3482                                                 print "<td class=\"link\">";
3483                                         }
3484                                         print $cgi->a({-href => href(action=>"blobdiff",
3485                                                                      hash=>$diff->{'to_id'},
3486                                                                      hash_parent=>$from_hash,
3487                                                                      hash_base=>$hash,
3488                                                                      hash_parent_base=>$hash_parent,
3489                                                                      file_name=>$diff->{'to_file'},
3490                                                                      file_parent=>$from_path)},
3491                                                       "diff" . ($i+1)) .
3492                                               " | </td>\n";
3493                                 }
3494                         }
3495
3496                         print "<td class=\"link\">";
3497                         if ($not_deleted) {
3498                                 print $cgi->a({-href => href(action=>"blob",
3499                                                              hash=>$diff->{'to_id'},
3500                                                              file_name=>$diff->{'to_file'},
3501                                                              hash_base=>$hash)},
3502                                               "blob");
3503                                 print " | " if ($has_history);
3504                         }
3505                         if ($has_history) {
3506                                 print $cgi->a({-href => href(action=>"history",
3507                                                              file_name=>$diff->{'to_file'},
3508                                                              hash_base=>$hash)},
3509                                               "history");
3510                         }
3511                         print "</td>\n";
3512
3513                         print "</tr>\n";
3514                         next; # instead of 'else' clause, to avoid extra indent
3515                 }
3516                 # else ordinary diff
3517
3518                 my ($to_mode_oct, $to_mode_str, $to_file_type);
3519                 my ($from_mode_oct, $from_mode_str, $from_file_type);
3520                 if ($diff->{'to_mode'} ne ('0' x 6)) {
3521                         $to_mode_oct = oct $diff->{'to_mode'};
3522                         if (S_ISREG($to_mode_oct)) { # only for regular file
3523                                 $to_mode_str = sprintf("%04o", $to_mode_oct & 0777); # permission bits
3524                         }
3525                         $to_file_type = file_type($diff->{'to_mode'});
3526                 }
3527                 if ($diff->{'from_mode'} ne ('0' x 6)) {
3528                         $from_mode_oct = oct $diff->{'from_mode'};
3529                         if (S_ISREG($to_mode_oct)) { # only for regular file
3530                                 $from_mode_str = sprintf("%04o", $from_mode_oct & 0777); # permission bits
3531                         }
3532                         $from_file_type = file_type($diff->{'from_mode'});
3533                 }
3534
3535                 if ($diff->{'status'} eq "A") { # created
3536                         my $mode_chng = "<span class=\"file_status new\">[new $to_file_type";
3537                         $mode_chng   .= " with mode: $to_mode_str" if $to_mode_str;
3538                         $mode_chng   .= "]</span>";
3539                         print "<td>";
3540                         print $cgi->a({-href => href(action=>"blob", hash=>$diff->{'to_id'},
3541                                                      hash_base=>$hash, file_name=>$diff->{'file'}),
3542                                       -class => "list"}, esc_path($diff->{'file'}));
3543                         print "</td>\n";
3544                         print "<td>$mode_chng</td>\n";
3545                         print "<td class=\"link\">";
3546                         if ($action eq 'commitdiff') {
3547                                 # link to patch
3548                                 $patchno++;
3549                                 print $cgi->a({-href => "#patch$patchno"}, "patch");
3550                                 print " | ";
3551                         }
3552                         print $cgi->a({-href => href(action=>"blob", hash=>$diff->{'to_id'},
3553                                                      hash_base=>$hash, file_name=>$diff->{'file'})},
3554                                       "blob");
3555                         print "</td>\n";
3556
3557                 } elsif ($diff->{'status'} eq "D") { # deleted
3558                         my $mode_chng = "<span class=\"file_status deleted\">[deleted $from_file_type]</span>";
3559                         print "<td>";
3560                         print $cgi->a({-href => href(action=>"blob", hash=>$diff->{'from_id'},
3561                                                      hash_base=>$parent, file_name=>$diff->{'file'}),
3562                                        -class => "list"}, esc_path($diff->{'file'}));
3563                         print "</td>\n";
3564                         print "<td>$mode_chng</td>\n";
3565                         print "<td class=\"link\">";
3566                         if ($action eq 'commitdiff') {
3567                                 # link to patch
3568                                 $patchno++;
3569                                 print $cgi->a({-href => "#patch$patchno"}, "patch");
3570                                 print " | ";
3571                         }
3572                         print $cgi->a({-href => href(action=>"blob", hash=>$diff->{'from_id'},
3573                                                      hash_base=>$parent, file_name=>$diff->{'file'})},
3574                                       "blob") . " | ";
3575                         if ($have_blame) {
3576                                 print $cgi->a({-href => href(action=>"blame", hash_base=>$parent,
3577                                                              file_name=>$diff->{'file'})},
3578                                               "blame") . " | ";
3579                         }
3580                         print $cgi->a({-href => href(action=>"history", hash_base=>$parent,
3581                                                      file_name=>$diff->{'file'})},
3582                                       "history");
3583                         print "</td>\n";
3584
3585                 } elsif ($diff->{'status'} eq "M" || $diff->{'status'} eq "T") { # modified, or type changed
3586                         my $mode_chnge = "";
3587                         if ($diff->{'from_mode'} != $diff->{'to_mode'}) {
3588                                 $mode_chnge = "<span class=\"file_status mode_chnge\">[changed";
3589                                 if ($from_file_type ne $to_file_type) {
3590                                         $mode_chnge .= " from $from_file_type to $to_file_type";
3591                                 }
3592                                 if (($from_mode_oct & 0777) != ($to_mode_oct & 0777)) {
3593                                         if ($from_mode_str && $to_mode_str) {
3594                                                 $mode_chnge .= " mode: $from_mode_str->$to_mode_str";
3595                                         } elsif ($to_mode_str) {
3596                                                 $mode_chnge .= " mode: $to_mode_str";
3597                                         }
3598                                 }
3599                                 $mode_chnge .= "]</span>\n";
3600                         }
3601                         print "<td>";
3602                         print $cgi->a({-href => href(action=>"blob", hash=>$diff->{'to_id'},
3603                                                      hash_base=>$hash, file_name=>$diff->{'file'}),
3604                                       -class => "list"}, esc_path($diff->{'file'}));
3605                         print "</td>\n";
3606                         print "<td>$mode_chnge</td>\n";
3607                         print "<td class=\"link\">";
3608                         if ($action eq 'commitdiff') {
3609                                 # link to patch
3610                                 $patchno++;
3611                                 print $cgi->a({-href => "#patch$patchno"}, "patch") .
3612                                       " | ";
3613                         } elsif ($diff->{'to_id'} ne $diff->{'from_id'}) {
3614                                 # "commit" view and modified file (not onlu mode changed)
3615                                 print $cgi->a({-href => href(action=>"blobdiff",
3616                                                              hash=>$diff->{'to_id'}, hash_parent=>$diff->{'from_id'},
3617                                                              hash_base=>$hash, hash_parent_base=>$parent,
3618                                                              file_name=>$diff->{'file'})},
3619                                               "diff") .
3620                                       " | ";
3621                         }
3622                         print $cgi->a({-href => href(action=>"blob", hash=>$diff->{'to_id'},
3623                                                      hash_base=>$hash, file_name=>$diff->{'file'})},
3624                                        "blob") . " | ";
3625                         if ($have_blame) {
3626                                 print $cgi->a({-href => href(action=>"blame", hash_base=>$hash,
3627                                                              file_name=>$diff->{'file'})},
3628                                               "blame") . " | ";
3629                         }
3630                         print $cgi->a({-href => href(action=>"history", hash_base=>$hash,
3631                                                      file_name=>$diff->{'file'})},
3632                                       "history");
3633                         print "</td>\n";
3634
3635                 } elsif ($diff->{'status'} eq "R" || $diff->{'status'} eq "C") { # renamed or copied
3636                         my %status_name = ('R' => 'moved', 'C' => 'copied');
3637                         my $nstatus = $status_name{$diff->{'status'}};
3638                         my $mode_chng = "";
3639                         if ($diff->{'from_mode'} != $diff->{'to_mode'}) {
3640                                 # mode also for directories, so we cannot use $to_mode_str
3641                                 $mode_chng = sprintf(", mode: %04o", $to_mode_oct & 0777);
3642                         }
3643                         print "<td>" .
3644                               $cgi->a({-href => href(action=>"blob", hash_base=>$hash,
3645                                                      hash=>$diff->{'to_id'}, file_name=>$diff->{'to_file'}),
3646                                       -class => "list"}, esc_path($diff->{'to_file'})) . "</td>\n" .
3647                               "<td><span class=\"file_status $nstatus\">[$nstatus from " .
3648                               $cgi->a({-href => href(action=>"blob", hash_base=>$parent,
3649                                                      hash=>$diff->{'from_id'}, file_name=>$diff->{'from_file'}),
3650                                       -class => "list"}, esc_path($diff->{'from_file'})) .
3651                               " with " . (int $diff->{'similarity'}) . "% similarity$mode_chng]</span></td>\n" .
3652                               "<td class=\"link\">";
3653                         if ($action eq 'commitdiff') {
3654                                 # link to patch
3655                                 $patchno++;
3656                                 print $cgi->a({-href => "#patch$patchno"}, "patch") .
3657                                       " | ";
3658                         } elsif ($diff->{'to_id'} ne $diff->{'from_id'}) {
3659                                 # "commit" view and modified file (not only pure rename or copy)
3660                                 print $cgi->a({-href => href(action=>"blobdiff",
3661                                                              hash=>$diff->{'to_id'}, hash_parent=>$diff->{'from_id'},
3662                                                              hash_base=>$hash, hash_parent_base=>$parent,
3663                                                              file_name=>$diff->{'to_file'}, file_parent=>$diff->{'from_file'})},
3664                                               "diff") .
3665                                       " | ";
3666                         }
3667                         print $cgi->a({-href => href(action=>"blob", hash=>$diff->{'to_id'},
3668                                                      hash_base=>$parent, file_name=>$diff->{'to_file'})},
3669                                       "blob") . " | ";
3670                         if ($have_blame) {
3671                                 print $cgi->a({-href => href(action=>"blame", hash_base=>$hash,
3672                                                              file_name=>$diff->{'to_file'})},
3673                                               "blame") . " | ";
3674                         }
3675                         print $cgi->a({-href => href(action=>"history", hash_base=>$hash,
3676                                                     file_name=>$diff->{'to_file'})},
3677                                       "history");
3678                         print "</td>\n";
3679
3680                 } # we should not encounter Unmerged (U) or Unknown (X) status
3681                 print "</tr>\n";
3682         }
3683         print "</tbody>" if $has_header;
3684         print "</table>\n";
3685 }
3686
3687 sub git_patchset_body {
3688         my ($fd, $difftree, $hash, @hash_parents) = @_;
3689         my ($hash_parent) = $hash_parents[0];
3690
3691         my $is_combined = (@hash_parents > 1);
3692         my $patch_idx = 0;
3693         my $patch_number = 0;
3694         my $patch_line;
3695         my $diffinfo;
3696         my $to_name;
3697         my (%from, %to);
3698
3699         print "<div class=\"patchset\">\n";
3700
3701         # skip to first patch
3702         while ($patch_line = <$fd>) {
3703                 chomp $patch_line;
3704
3705                 last if ($patch_line =~ m/^diff /);
3706         }
3707
3708  PATCH:
3709         while ($patch_line) {
3710
3711                 # parse "git diff" header line
3712                 if ($patch_line =~ m/^diff --git (\"(?:[^\\\"]*(?:\\.[^\\\"]*)*)\"|[^ "]*) (.*)$/) {
3713                         # $1 is from_name, which we do not use
3714                         $to_name = unquote($2);
3715                         $to_name =~ s!^b/!!;
3716                 } elsif ($patch_line =~ m/^diff --(cc|combined) ("?.*"?)$/) {
3717                         # $1 is 'cc' or 'combined', which we do not use
3718                         $to_name = unquote($2);
3719                 } else {
3720                         $to_name = undef;
3721                 }
3722
3723                 # check if current patch belong to current raw line
3724                 # and parse raw git-diff line if needed
3725                 if (is_patch_split($diffinfo, { 'to_file' => $to_name })) {
3726                         # this is continuation of a split patch
3727                         print "<div class=\"patch cont\">\n";
3728                 } else {
3729                         # advance raw git-diff output if needed
3730                         $patch_idx++ if defined $diffinfo;
3731
3732                         # read and prepare patch information
3733                         $diffinfo = parsed_difftree_line($difftree->[$patch_idx]);
3734
3735                         # compact combined diff output can have some patches skipped
3736                         # find which patch (using pathname of result) we are at now;
3737                         if ($is_combined) {
3738                                 while ($to_name ne $diffinfo->{'to_file'}) {
3739                                         print "<div class=\"patch\" id=\"patch". ($patch_idx+1) ."\">\n" .
3740                                               format_diff_cc_simplified($diffinfo, @hash_parents) .
3741                                               "</div>\n";  # class="patch"
3742
3743                                         $patch_idx++;
3744                                         $patch_number++;
3745
3746                                         last if $patch_idx > $#$difftree;
3747                                         $diffinfo = parsed_difftree_line($difftree->[$patch_idx]);
3748                                 }
3749                         }
3750
3751                         # modifies %from, %to hashes
3752                         parse_from_to_diffinfo($diffinfo, \%from, \%to, @hash_parents);
3753
3754                         # this is first patch for raw difftree line with $patch_idx index
3755                         # we index @$difftree array from 0, but number patches from 1
3756                         print "<div class=\"patch\" id=\"patch". ($patch_idx+1) ."\">\n";
3757                 }
3758
3759                 # git diff header
3760                 #assert($patch_line =~ m/^diff /) if DEBUG;
3761                 #assert($patch_line !~ m!$/$!) if DEBUG; # is chomp-ed
3762                 $patch_number++;
3763                 # print "git diff" header
3764                 print format_git_diff_header_line($patch_line, $diffinfo,
3765                                                   \%from, \%to);
3766
3767                 # print extended diff header
3768                 print "<div class=\"diff extended_header\">\n";
3769         EXTENDED_HEADER:
3770                 while ($patch_line = <$fd>) {
3771                         chomp $patch_line;
3772
3773                         last EXTENDED_HEADER if ($patch_line =~ m/^--- |^diff /);
3774
3775                         print format_extended_diff_header_line($patch_line, $diffinfo,
3776                                                                \%from, \%to);
3777                 }
3778                 print "</div>\n"; # class="diff extended_header"
3779
3780                 # from-file/to-file diff header
3781                 if (! $patch_line) {
3782                         print "</div>\n"; # class="patch"
3783                         last PATCH;
3784                 }
3785                 next PATCH if ($patch_line =~ m/^diff /);
3786                 #assert($patch_line =~ m/^---/) if DEBUG;
3787
3788                 my $last_patch_line = $patch_line;
3789                 $patch_line = <$fd>;
3790                 chomp $patch_line;
3791                 #assert($patch_line =~ m/^\+\+\+/) if DEBUG;
3792
3793                 print format_diff_from_to_header($last_patch_line, $patch_line,
3794                                                  $diffinfo, \%from, \%to,
3795                                                  @hash_parents);
3796
3797                 # the patch itself
3798         LINE:
3799                 while ($patch_line = <$fd>) {
3800                         chomp $patch_line;
3801
3802                         next PATCH if ($patch_line =~ m/^diff /);
3803
3804                         print format_diff_line($patch_line, \%from, \%to);
3805                 }
3806
3807         } continue {
3808                 print "</div>\n"; # class="patch"
3809         }
3810
3811         # for compact combined (--cc) format, with chunk and patch simpliciaction
3812         # patchset might be empty, but there might be unprocessed raw lines
3813         for (++$patch_idx if $patch_number > 0;
3814              $patch_idx < @$difftree;
3815              ++$patch_idx) {
3816                 # read and prepare patch information
3817                 $diffinfo = parsed_difftree_line($difftree->[$patch_idx]);
3818
3819                 # generate anchor for "patch" links in difftree / whatchanged part
3820                 print "<div class=\"patch\" id=\"patch". ($patch_idx+1) ."\">\n" .
3821                       format_diff_cc_simplified($diffinfo, @hash_parents) .
3822                       "</div>\n";  # class="patch"
3823
3824                 $patch_number++;
3825         }
3826
3827         if ($patch_number == 0) {
3828                 if (@hash_parents > 1) {
3829                         print "<div class=\"diff nodifferences\">Trivial merge</div>\n";
3830                 } else {
3831                         print "<div class=\"diff nodifferences\">No differences found</div>\n";
3832                 }
3833         }
3834
3835         print "</div>\n"; # class="patchset"
3836 }
3837
3838 # . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
3839
3840 # fills project list info (age, description, owner, forks) for each
3841 # project in the list, removing invalid projects from returned list
3842 # NOTE: modifies $projlist, but does not remove entries from it
3843 sub fill_project_list_info {
3844         my ($projlist, $check_forks) = @_;
3845         my @projects;
3846
3847         my $show_ctags = gitweb_check_feature('ctags');
3848  PROJECT:
3849         foreach my $pr (@$projlist) {
3850                 my (@activity) = git_get_last_activity($pr->{'path'});
3851                 unless (@activity) {
3852                         next PROJECT;
3853                 }
3854                 ($pr->{'age'}, $pr->{'age_string'}) = @activity;
3855                 if (!defined $pr->{'descr'}) {
3856                         my $descr = git_get_project_description($pr->{'path'}) || "";
3857                         $descr = to_utf8($descr);
3858                         $pr->{'descr_long'} = $descr;
3859                         $pr->{'descr'} = chop_str($descr, $projects_list_description_width, 5);
3860                 }
3861                 if (!defined $pr->{'owner'}) {
3862                         $pr->{'owner'} = git_get_project_owner("$pr->{'path'}") || "";
3863                 }
3864                 if ($check_forks) {
3865                         my $pname = $pr->{'path'};
3866                         if (($pname =~ s/\.git$//) &&
3867                             ($pname !~ /\/$/) &&
3868                             (-d "$projectroot/$pname")) {
3869                                 $pr->{'forks'} = "-d $projectroot/$pname";
3870                         }       else {
3871                                 $pr->{'forks'} = 0;
3872                         }
3873                 }
3874                 $show_ctags and $pr->{'ctags'} = git_get_project_ctags($pr->{'path'});
3875                 push @projects, $pr;
3876         }
3877
3878         return @projects;
3879 }
3880
3881 # print 'sort by' <th> element, generating 'sort by $name' replay link
3882 # if that order is not selected
3883 sub print_sort_th {
3884         my ($name, $order, $header) = @_;
3885         $header ||= ucfirst($name);
3886
3887         if ($order eq $name) {
3888                 print "<th>$header</th>\n";
3889         } else {
3890                 print "<th>" .
3891                       $cgi->a({-href => href(-replay=>1, order=>$name),
3892                                -class => "header"}, $header) .
3893                       "</th>\n";
3894         }
3895 }
3896
3897 sub git_project_list_body {
3898         # actually uses global variable $project
3899         my ($projlist, $order, $from, $to, $extra, $no_header) = @_;
3900
3901         my ($check_forks) = gitweb_check_feature('forks');
3902         my @projects = fill_project_list_info($projlist, $check_forks);
3903
3904         $order ||= $default_projects_order;
3905         $from = 0 unless defined $from;
3906         $to = $#projects if (!defined $to || $#projects < $to);
3907
3908         my %order_info = (
3909                 project => { key => 'path', type => 'str' },
3910                 descr => { key => 'descr_long', type => 'str' },
3911                 owner => { key => 'owner', type => 'str' },
3912                 age => { key => 'age', type => 'num' }
3913         );
3914         my $oi = $order_info{$order};
3915         if ($oi->{'type'} eq 'str') {
3916                 @projects = sort {$a->{$oi->{'key'}} cmp $b->{$oi->{'key'}}} @projects;
3917         } else {
3918                 @projects = sort {$a->{$oi->{'key'}} <=> $b->{$oi->{'key'}}} @projects;
3919         }
3920
3921         my $show_ctags = gitweb_check_feature('ctags');
3922         if ($show_ctags) {
3923                 my %ctags;
3924                 foreach my $p (@projects) {
3925                         foreach my $ct (keys %{$p->{'ctags'}}) {
3926                                 $ctags{$ct} += $p->{'ctags'}->{$ct};
3927                         }
3928                 }
3929                 my $cloud = git_populate_project_tagcloud(\%ctags);
3930                 print git_show_project_tagcloud($cloud, 64);
3931         }
3932
3933         print "<table class=\"project_list\">\n";
3934         unless ($no_header) {
3935                 print "<tr>\n";
3936                 if ($check_forks) {
3937                         print "<th></th>\n";
3938                 }
3939                 print_sort_th('project', $order, 'Project');
3940                 print_sort_th('descr', $order, 'Description');
3941                 print_sort_th('owner', $order, 'Owner');
3942                 print_sort_th('age', $order, 'Last Change');
3943                 print "<th></th>\n" . # for links
3944                       "</tr>\n";
3945         }
3946         my $alternate = 1;
3947         my $tagfilter = $cgi->param('by_tag');
3948         for (my $i = $from; $i <= $to; $i++) {
3949                 my $pr = $projects[$i];
3950
3951                 next if $tagfilter and $show_ctags and not grep { lc $_ eq lc $tagfilter } keys %{$pr->{'ctags'}};
3952                 next if $searchtext and not $pr->{'path'} =~ /$searchtext/
3953                         and not $pr->{'descr_long'} =~ /$searchtext/;
3954                 # Weed out forks or non-matching entries of search
3955                 if ($check_forks) {
3956                         my $forkbase = $project; $forkbase ||= ''; $forkbase =~ s#\.git$#/#;
3957                         $forkbase="^$forkbase" if $forkbase;
3958                         next if not $searchtext and not $tagfilter and $show_ctags
3959                                 and $pr->{'path'} =~ m#$forkbase.*/.*#; # regexp-safe
3960                 }
3961
3962                 if ($alternate) {
3963                         print "<tr class=\"dark\">\n";
3964                 } else {
3965                         print "<tr class=\"light\">\n";
3966                 }
3967                 $alternate ^= 1;
3968                 if ($check_forks) {
3969                         print "<td>";
3970                         if ($pr->{'forks'}) {
3971                                 print "<!-- $pr->{'forks'} -->\n";
3972                                 print $cgi->a({-href => href(project=>$pr->{'path'}, action=>"forks")}, "+");
3973                         }
3974                         print "</td>\n";
3975                 }
3976                 print "<td>" . $cgi->a({-href => href(project=>$pr->{'path'}, action=>"summary"),
3977                                         -class => "list"}, esc_html($pr->{'path'})) . "</td>\n" .
3978                       "<td>" . $cgi->a({-href => href(project=>$pr->{'path'}, action=>"summary"),
3979                                         -class => "list", -title => $pr->{'descr_long'}},
3980                                         esc_html($pr->{'descr'})) . "</td>\n" .
3981                       "<td><i>" . chop_and_escape_str($pr->{'owner'}, 15) . "</i></td>\n";
3982                 print "<td class=\"". age_class($pr->{'age'}) . "\">" .
3983                       (defined $pr->{'age_string'} ? $pr->{'age_string'} : "No commits") . "</td>\n" .
3984                       "<td class=\"link\">" .
3985                       $cgi->a({-href => href(project=>$pr->{'path'}, action=>"summary")}, "summary")   . " | " .
3986                       $cgi->a({-href => href(project=>$pr->{'path'}, action=>"shortlog")}, "shortlog") . " | " .
3987                       $cgi->a({-href => href(project=>$pr->{'path'}, action=>"log")}, "log") . " | " .
3988                       $cgi->a({-href => href(project=>$pr->{'path'}, action=>"tree")}, "tree") .
3989                       ($pr->{'forks'} ? " | " . $cgi->a({-href => href(project=>$pr->{'path'}, action=>"forks")}, "forks") : '') .
3990                       "</td>\n" .
3991                       "</tr>\n";
3992         }
3993         if (defined $extra) {
3994                 print "<tr>\n";
3995                 if ($check_forks) {
3996                         print "<td></td>\n";
3997                 }
3998                 print "<td colspan=\"5\">$extra</td>\n" .
3999                       "</tr>\n";
4000         }
4001         print "</table>\n";
4002 }
4003
4004 sub git_shortlog_body {
4005         # uses global variable $project
4006         my ($commitlist, $from, $to, $refs, $extra) = @_;
4007
4008         $from = 0 unless defined $from;
4009         $to = $#{$commitlist} if (!defined $to || $#{$commitlist} < $to);
4010
4011         print "<table class=\"shortlog\">\n";
4012         my $alternate = 1;
4013         for (my $i = $from; $i <= $to; $i++) {
4014                 my %co = %{$commitlist->[$i]};
4015                 my $commit = $co{'id'};
4016                 my $ref = format_ref_marker($refs, $commit);
4017                 if ($alternate) {
4018                         print "<tr class=\"dark\">\n";
4019                 } else {
4020                         print "<tr class=\"light\">\n";
4021                 }
4022                 $alternate ^= 1;
4023                 my $author = chop_and_escape_str($co{'author_name'}, 10);
4024                 # git_summary() used print "<td><i>$co{'age_string'}</i></td>\n" .
4025                 print "<td title=\"$co{'age_string_age'}\"><i>$co{'age_string_date'}</i></td>\n" .
4026                       "<td><i>" . $author . "</i></td>\n" .
4027                       "<td>";
4028                 print format_subject_html($co{'title'}, $co{'title_short'},
4029                                           href(action=>"commit", hash=>$commit), $ref);
4030                 print "</td>\n" .
4031                       "<td class=\"link\">" .
4032                       $cgi->a({-href => href(action=>"commit", hash=>$commit)}, "commit") . " | " .
4033                       $cgi->a({-href => href(action=>"commitdiff", hash=>$commit)}, "commitdiff") . " | " .
4034                       $cgi->a({-href => href(action=>"tree", hash=>$commit, hash_base=>$commit)}, "tree");
4035                 my $snapshot_links = format_snapshot_links($commit);
4036                 if (defined $snapshot_links) {
4037                         print " | " . $snapshot_links;
4038                 }
4039                 print "</td>\n" .
4040                       "</tr>\n";
4041         }
4042         if (defined $extra) {
4043                 print "<tr>\n" .
4044                       "<td colspan=\"4\">$extra</td>\n" .
4045                       "</tr>\n";
4046         }
4047         print "</table>\n";
4048 }
4049
4050 sub git_history_body {
4051         # Warning: assumes constant type (blob or tree) during history
4052         my ($commitlist, $from, $to, $refs, $hash_base, $ftype, $extra) = @_;
4053
4054         $from = 0 unless defined $from;
4055         $to = $#{$commitlist} unless (defined $to && $to <= $#{$commitlist});
4056
4057         print "<table class=\"history\">\n";
4058         my $alternate = 1;
4059         for (my $i = $from; $i <= $to; $i++) {
4060                 my %co = %{$commitlist->[$i]};
4061                 if (!%co) {
4062                         next;
4063                 }
4064                 my $commit = $co{'id'};
4065
4066                 my $ref = format_ref_marker($refs, $commit);
4067
4068                 if ($alternate) {
4069                         print "<tr class=\"dark\">\n";
4070                 } else {
4071                         print "<tr class=\"light\">\n";
4072                 }
4073                 $alternate ^= 1;
4074         # shortlog uses      chop_str($co{'author_name'}, 10)
4075                 my $author = chop_and_escape_str($co{'author_name'}, 15, 3);
4076                 print "<td title=\"$co{'age_string_age'}\"><i>$co{'age_string_date'}</i></td>\n" .
4077                       "<td><i>" . $author . "</i></td>\n" .
4078                       "<td>";
4079                 # originally git_history used chop_str($co{'title'}, 50)
4080                 print format_subject_html($co{'title'}, $co{'title_short'},
4081                                           href(action=>"commit", hash=>$commit), $ref);
4082                 print "</td>\n" .
4083                       "<td class=\"link\">" .
4084                       $cgi->a({-href => href(action=>$ftype, hash_base=>$commit, file_name=>$file_name)}, $ftype) . " | " .
4085                       $cgi->a({-href => href(action=>"commitdiff", hash=>$commit)}, "commitdiff");
4086
4087                 if ($ftype eq 'blob') {
4088                         my $blob_current = git_get_hash_by_path($hash_base, $file_name);
4089                         my $blob_parent  = git_get_hash_by_path($commit, $file_name);
4090                         if (defined $blob_current && defined $blob_parent &&
4091                                         $blob_current ne $blob_parent) {
4092                                 print " | " .
4093                                         $cgi->a({-href => href(action=>"blobdiff",
4094                                                                hash=>$blob_current, hash_parent=>$blob_parent,
4095                                                                hash_base=>$hash_base, hash_parent_base=>$commit,
4096                                                                file_name=>$file_name)},
4097                                                 "diff to current");
4098                         }
4099                 }
4100                 print "</td>\n" .
4101                       "</tr>\n";
4102         }
4103         if (defined $extra) {
4104                 print "<tr>\n" .
4105                       "<td colspan=\"4\">$extra</td>\n" .
4106                       "</tr>\n";
4107         }
4108         print "</table>\n";
4109 }
4110
4111 sub git_tags_body {
4112         # uses global variable $project
4113         my ($taglist, $from, $to, $extra) = @_;
4114         $from = 0 unless defined $from;
4115         $to = $#{$taglist} if (!defined $to || $#{$taglist} < $to);
4116
4117         print "<table class=\"tags\">\n";
4118         my $alternate = 1;
4119         for (my $i = $from; $i <= $to; $i++) {
4120                 my $entry = $taglist->[$i];
4121                 my %tag = %$entry;
4122                 my $comment = $tag{'subject'};
4123                 my $comment_short;
4124                 if (defined $comment) {
4125                         $comment_short = chop_str($comment, 30, 5);
4126                 }
4127                 if ($alternate) {
4128                         print "<tr class=\"dark\">\n";
4129                 } else {
4130                         print "<tr class=\"light\">\n";
4131                 }
4132                 $alternate ^= 1;
4133                 if (defined $tag{'age'}) {
4134                         print "<td><i>$tag{'age'}</i></td>\n";
4135                 } else {
4136                         print "<td></td>\n";
4137                 }
4138                 print "<td>" .
4139                       $cgi->a({-href => href(action=>$tag{'reftype'}, hash=>$tag{'refid'}),
4140                                -class => "list name"}, esc_html($tag{'name'})) .
4141                       "</td>\n" .
4142                       "<td>";
4143                 if (defined $comment) {
4144                         print format_subject_html($comment, $comment_short,
4145                                                   href(action=>"tag", hash=>$tag{'id'}));
4146                 }
4147                 print "</td>\n" .
4148                       "<td class=\"selflink\">";
4149                 if ($tag{'type'} eq "tag") {
4150                         print $cgi->a({-href => href(action=>"tag", hash=>$tag{'id'})}, "tag");
4151                 } else {
4152                         print "&nbsp;";
4153                 }
4154                 print "</td>\n" .
4155                       "<td class=\"link\">" . " | " .
4156                       $cgi->a({-href => href(action=>$tag{'reftype'}, hash=>$tag{'refid'})}, $tag{'reftype'});
4157                 if ($tag{'reftype'} eq "commit") {
4158                         print " | " . $cgi->a({-href => href(action=>"shortlog", hash=>$tag{'fullname'})}, "shortlog") .
4159                               " | " . $cgi->a({-href => href(action=>"log", hash=>$tag{'fullname'})}, "log");
4160                 } elsif ($tag{'reftype'} eq "blob") {
4161                         print " | " . $cgi->a({-href => href(action=>"blob_plain", hash=>$tag{'refid'})}, "raw");
4162                 }
4163                 print "</td>\n" .
4164                       "</tr>";
4165         }
4166         if (defined $extra) {
4167                 print "<tr>\n" .
4168                       "<td colspan=\"5\">$extra</td>\n" .
4169                       "</tr>\n";
4170         }
4171         print "</table>\n";
4172 }
4173
4174 sub git_heads_body {
4175         # uses global variable $project
4176         my ($headlist, $head, $from, $to, $extra) = @_;
4177         $from = 0 unless defined $from;
4178         $to = $#{$headlist} if (!defined $to || $#{$headlist} < $to);
4179
4180         print "<table class=\"heads\">\n";
4181         my $alternate = 1;
4182         for (my $i = $from; $i <= $to; $i++) {
4183                 my $entry = $headlist->[$i];
4184                 my %ref = %$entry;
4185                 my $curr = $ref{'id'} eq $head;
4186                 if ($alternate) {
4187                         print "<tr class=\"dark\">\n";
4188                 } else {
4189                         print "<tr class=\"light\">\n";
4190                 }
4191                 $alternate ^= 1;
4192                 print "<td><i>$ref{'age'}</i></td>\n" .
4193                       ($curr ? "<td class=\"current_head\">" : "<td>") .
4194                       $cgi->a({-href => href(action=>"shortlog", hash=>$ref{'fullname'}),
4195                                -class => "list name"},esc_html($ref{'name'})) .
4196                       "</td>\n" .
4197                       "<td class=\"link\">" .
4198                       $cgi->a({-href => href(action=>"shortlog", hash=>$ref{'fullname'})}, "shortlog") . " | " .
4199                       $cgi->a({-href => href(action=>"log", hash=>$ref{'fullname'})}, "log") . " | " .
4200                       $cgi->a({-href => href(action=>"tree", hash=>$ref{'fullname'}, hash_base=>$ref{'name'})}, "tree") .
4201                       "</td>\n" .
4202                       "</tr>";
4203         }
4204         if (defined $extra) {
4205                 print "<tr>\n" .
4206                       "<td colspan=\"3\">$extra</td>\n" .
4207                       "</tr>\n";
4208         }
4209         print "</table>\n";
4210 }
4211
4212 sub git_search_grep_body {
4213         my ($commitlist, $from, $to, $extra) = @_;
4214         $from = 0 unless defined $from;
4215         $to = $#{$commitlist} if (!defined $to || $#{$commitlist} < $to);
4216
4217         print "<table class=\"commit_search\">\n";
4218         my $alternate = 1;
4219         for (my $i = $from; $i <= $to; $i++) {
4220                 my %co = %{$commitlist->[$i]};
4221                 if (!%co) {
4222                         next;
4223                 }
4224                 my $commit = $co{'id'};
4225                 if ($alternate) {
4226                         print "<tr class=\"dark\">\n";
4227                 } else {
4228                         print "<tr class=\"light\">\n";
4229                 }
4230                 $alternate ^= 1;
4231                 my $author = chop_and_escape_str($co{'author_name'}, 15, 5);
4232                 print "<td title=\"$co{'age_string_age'}\"><i>$co{'age_string_date'}</i></td>\n" .
4233                       "<td><i>" . $author . "</i></td>\n" .
4234                       "<td>" .
4235                       $cgi->a({-href => href(action=>"commit", hash=>$co{'id'}),
4236                                -class => "list subject"},
4237                               chop_and_escape_str($co{'title'}, 50) . "<br/>");
4238                 my $comment = $co{'comment'};
4239                 foreach my $line (@$comment) {
4240                         if ($line =~ m/^(.*?)($search_regexp)(.*)$/i) {
4241                                 my ($lead, $match, $trail) = ($1, $2, $3);
4242                                 $match = chop_str($match, 70, 5, 'center');
4243                                 my $contextlen = int((80 - length($match))/2);
4244                                 $contextlen = 30 if ($contextlen > 30);
4245                                 $lead  = chop_str($lead,  $contextlen, 10, 'left');
4246                                 $trail = chop_str($trail, $contextlen, 10, 'right');
4247
4248                                 $lead  = esc_html($lead);
4249                                 $match = esc_html($match);
4250                                 $trail = esc_html($trail);
4251
4252                                 print "$lead<span class=\"match\">$match</span>$trail<br />";
4253                         }
4254                 }
4255                 print "</td>\n" .
4256                       "<td class=\"link\">" .
4257                       $cgi->a({-href => href(action=>"commit", hash=>$co{'id'})}, "commit") .
4258                       " | " .
4259                       $cgi->a({-href => href(action=>"commitdiff", hash=>$co{'id'})}, "commitdiff") .
4260                       " | " .
4261                       $cgi->a({-href => href(action=>"tree", hash=>$co{'tree'}, hash_base=>$co{'id'})}, "tree");
4262                 print "</td>\n" .
4263                       "</tr>\n";
4264         }
4265         if (defined $extra) {
4266                 print "<tr>\n" .
4267                       "<td colspan=\"3\">$extra</td>\n" .
4268                       "</tr>\n";
4269         }
4270         print "</table>\n";
4271 }
4272
4273 ## ======================================================================
4274 ## ======================================================================
4275 ## actions
4276
4277 sub git_project_list {
4278         my $order = $input_params{'order'};
4279         if (defined $order && $order !~ m/none|project|descr|owner|age/) {
4280                 die_error(400, "Unknown order parameter");
4281         }
4282
4283         my @list = git_get_projects_list();
4284         if (!@list) {
4285                 die_error(404, "No projects found");
4286         }
4287
4288         git_header_html();
4289         if (-f $home_text) {
4290                 print "<div class=\"index_include\">\n";
4291                 open (my $fd, $home_text);
4292                 print <$fd>;
4293                 close $fd;
4294                 print "</div>\n";
4295         }
4296         print $cgi->startform(-method => "get") .
4297               "<p class=\"projsearch\">Search:\n" .
4298               $cgi->textfield(-name => "s", -value => $searchtext) . "\n" .
4299               "</p>" .
4300               $cgi->end_form() . "\n";
4301         git_project_list_body(\@list, $order);
4302         git_footer_html();
4303 }
4304
4305 sub git_forks {
4306         my $order = $input_params{'order'};
4307         if (defined $order && $order !~ m/none|project|descr|owner|age/) {
4308                 die_error(400, "Unknown order parameter");
4309         }
4310
4311         my @list = git_get_projects_list($project);
4312         if (!@list) {
4313                 die_error(404, "No forks found");
4314         }
4315
4316         git_header_html();
4317         git_print_page_nav('','');
4318         git_print_header_div('summary', "$project forks");
4319         git_project_list_body(\@list, $order);
4320         git_footer_html();
4321 }
4322
4323 sub git_project_index {
4324         my @projects = git_get_projects_list($project);
4325
4326         print $cgi->header(
4327                 -type => 'text/plain',
4328                 -charset => 'utf-8',
4329                 -content_disposition => 'inline; filename="index.aux"');
4330
4331         foreach my $pr (@projects) {
4332                 if (!exists $pr->{'owner'}) {
4333                         $pr->{'owner'} = git_get_project_owner("$pr->{'path'}");
4334                 }
4335
4336                 my ($path, $owner) = ($pr->{'path'}, $pr->{'owner'});
4337                 # quote as in CGI::Util::encode, but keep the slash, and use '+' for ' '
4338                 $path  =~ s/([^a-zA-Z0-9_.\-\/ ])/sprintf("%%%02X", ord($1))/eg;
4339                 $owner =~ s/([^a-zA-Z0-9_.\-\/ ])/sprintf("%%%02X", ord($1))/eg;
4340                 $path  =~ s/ /\+/g;
4341                 $owner =~ s/ /\+/g;
4342
4343                 print "$path $owner\n";
4344         }
4345 }
4346
4347 sub git_summary {
4348         my $descr = git_get_project_description($project) || "none";
4349         my %co = parse_commit("HEAD");
4350         my %cd = %co ? parse_date($co{'committer_epoch'}, $co{'committer_tz'}) : ();
4351         my $head = $co{'id'};
4352
4353         my $owner = git_get_project_owner($project);
4354
4355         my $refs = git_get_references();
4356         # These get_*_list functions return one more to allow us to see if
4357         # there are more ...
4358         my @taglist  = git_get_tags_list(16);
4359         my @headlist = git_get_heads_list(16);
4360         my @forklist;
4361         my ($check_forks) = gitweb_check_feature('forks');
4362
4363         if ($check_forks) {
4364                 @forklist = git_get_projects_list($project);
4365         }
4366
4367         git_header_html();
4368         git_print_page_nav('summary','', $head);
4369
4370         print "<div class=\"title\">&nbsp;</div>\n";
4371         print "<table class=\"projects_list\">\n" .
4372               "<tr id=\"metadata_desc\"><td>description</td><td>" . esc_html($descr) . "</td></tr>\n" .
4373               "<tr id=\"metadata_owner\"><td>owner</td><td>" . esc_html($owner) . "</td></tr>\n";
4374         if (defined $cd{'rfc2822'}) {
4375                 print "<tr id=\"metadata_lchange\"><td>last change</td><td>$cd{'rfc2822'}</td></tr>\n";
4376         }
4377
4378         # use per project git URL list in $projectroot/$project/cloneurl
4379         # or make project git URL from git base URL and project name
4380         my $url_tag = "URL";
4381         my @url_list = git_get_project_url_list($project);
4382         @url_list = map { "$_/$project" } @git_base_url_list unless @url_list;
4383         foreach my $git_url (@url_list) {
4384                 next unless $git_url;
4385                 print "<tr class=\"metadata_url\"><td>$url_tag</td><td>$git_url</td></tr>\n";
4386                 $url_tag = "";
4387         }
4388
4389         # Tag cloud
4390         my $show_ctags = (gitweb_check_feature('ctags'))[0];
4391         if ($show_ctags) {
4392                 my $ctags = git_get_project_ctags($project);
4393                 my $cloud = git_populate_project_tagcloud($ctags);
4394                 print "<tr id=\"metadata_ctags\"><td>Content tags:<br />";
4395                 print "</td>\n<td>" unless %$ctags;
4396                 print "<form action=\"$show_ctags\" method=\"post\"><input type=\"hidden\" name=\"p\" value=\"$project\" />Add: <input type=\"text\" name=\"t\" size=\"8\" /></form>";
4397                 print "</td>\n<td>" if %$ctags;
4398                 print git_show_project_tagcloud($cloud, 48);
4399                 print "</td></tr>";
4400         }
4401
4402         print "</table>\n";
4403
4404         if (-s "$projectroot/$project/README.html") {
4405                 if (open my $fd, "$projectroot/$project/README.html") {
4406                         print "<div class=\"title\">readme</div>\n" .
4407                               "<div class=\"readme\">\n";
4408                         print $_ while (<$fd>);
4409                         print "\n</div>\n"; # class="readme"
4410                         close $fd;
4411                 }
4412         }
4413
4414         # we need to request one more than 16 (0..15) to check if
4415         # those 16 are all
4416         my @commitlist = $head ? parse_commits($head, 17) : ();
4417         if (@commitlist) {
4418                 git_print_header_div('shortlog');
4419                 git_shortlog_body(\@commitlist, 0, 15, $refs,
4420                                   $#commitlist <=  15 ? undef :
4421                                   $cgi->a({-href => href(action=>"shortlog")}, "..."));
4422         }
4423
4424         if (@taglist) {
4425                 git_print_header_div('tags');
4426                 git_tags_body(\@taglist, 0, 15,
4427                               $#taglist <=  15 ? undef :
4428                               $cgi->a({-href => href(action=>"tags")}, "..."));
4429         }
4430
4431         if (@headlist) {
4432                 git_print_header_div('heads');
4433                 git_heads_body(\@headlist, $head, 0, 15,
4434                                $#headlist <= 15 ? undef :
4435                                $cgi->a({-href => href(action=>"heads")}, "..."));
4436         }
4437
4438         if (@forklist) {
4439                 git_print_header_div('forks');
4440                 git_project_list_body(\@forklist, 'age', 0, 15,
4441                                       $#forklist <= 15 ? undef :
4442                                       $cgi->a({-href => href(action=>"forks")}, "..."),
4443                                       'no_header');
4444         }
4445
4446         git_footer_html();
4447 }
4448
4449 sub git_tag {
4450         my $head = git_get_head_hash($project);
4451         git_header_html();
4452         git_print_page_nav('','', $head,undef,$head);
4453         my %tag = parse_tag($hash);
4454
4455         if (! %tag) {
4456                 die_error(404, "Unknown tag object");
4457         }
4458
4459         git_print_header_div('commit', esc_html($tag{'name'}), $hash);
4460         print "<div class=\"title_text\">\n" .
4461               "<table class=\"object_header\">\n" .
4462               "<tr>\n" .
4463               "<td>object</td>\n" .
4464               "<td>" . $cgi->a({-class => "list", -href => href(action=>$tag{'type'}, hash=>$tag{'object'})},
4465                                $tag{'object'}) . "</td>\n" .
4466               "<td class=\"link\">" . $cgi->a({-href => href(action=>$tag{'type'}, hash=>$tag{'object'})},
4467                                               $tag{'type'}) . "</td>\n" .
4468               "</tr>\n";
4469         if (defined($tag{'author'})) {
4470                 my %ad = parse_date($tag{'epoch'}, $tag{'tz'});
4471                 print "<tr><td>author</td><td>" . esc_html($tag{'author'}) . "</td></tr>\n";
4472                 print "<tr><td></td><td>" . $ad{'rfc2822'} .
4473                         sprintf(" (%02d:%02d %s)", $ad{'hour_local'}, $ad{'minute_local'}, $ad{'tz_local'}) .
4474                         "</td></tr>\n";
4475         }
4476         print "</table>\n\n" .
4477               "</div>\n";
4478         print "<div class=\"page_body\">";
4479         my $comment = $tag{'comment'};
4480         foreach my $line (@$comment) {
4481                 chomp $line;
4482                 print esc_html($line, -nbsp=>1) . "<br/>\n";
4483         }
4484         print "</div>\n";
4485         git_footer_html();
4486 }
4487
4488 sub git_blame {
4489         my $fd;
4490         my $ftype;
4491
4492         gitweb_check_feature('blame')
4493             or die_error(403, "Blame view not allowed");
4494
4495         die_error(400, "No file name given") unless $file_name;
4496         $hash_base ||= git_get_head_hash($project);
4497         die_error(404, "Couldn't find base commit") unless ($hash_base);
4498         my %co = parse_commit($hash_base)
4499                 or die_error(404, "Commit not found");
4500         if (!defined $hash) {
4501                 $hash = git_get_hash_by_path($hash_base, $file_name, "blob")
4502                         or die_error(404, "Error looking up file");
4503         }
4504         $ftype = git_get_type($hash);
4505         if ($ftype !~ "blob") {
4506                 die_error(400, "Object is not a blob");
4507         }
4508         open ($fd, "-|", git_cmd(), "blame", '-p', '--',
4509               $file_name, $hash_base)
4510                 or die_error(500, "Open git-blame failed");
4511         git_header_html();
4512         my $formats_nav =
4513                 $cgi->a({-href => href(action=>"blob", -replay=>1)},
4514                         "blob") .
4515                 " | " .
4516                 $cgi->a({-href => href(action=>"history", -replay=>1)},
4517                         "history") .
4518                 " | " .
4519                 $cgi->a({-href => href(action=>"blame", file_name=>$file_name)},
4520                         "HEAD");
4521         git_print_page_nav('','', $hash_base,$co{'tree'},$hash_base, $formats_nav);
4522         git_print_header_div('commit', esc_html($co{'title'}), $hash_base);
4523         git_print_page_path($file_name, $ftype, $hash_base);
4524         my @rev_color = (qw(light2 dark2));
4525         my $num_colors = scalar(@rev_color);
4526         my $current_color = 0;
4527         my $last_rev;
4528         print <<HTML;
4529 <div class="page_body">
4530 <table class="blame">
4531 <tr><th>Commit</th><th>Line</th><th>Data</th></tr>
4532 HTML
4533         my %metainfo = ();
4534         while (1) {
4535                 $_ = <$fd>;
4536                 last unless defined $_;
4537                 my ($full_rev, $orig_lineno, $lineno, $group_size) =
4538                     /^([0-9a-f]{40}) (\d+) (\d+)(?: (\d+))?$/;
4539                 if (!exists $metainfo{$full_rev}) {
4540                         $metainfo{$full_rev} = {};
4541                 }
4542                 my $meta = $metainfo{$full_rev};
4543                 while (<$fd>) {
4544                         last if (s/^\t//);
4545                         if (/^(\S+) (.*)$/) {
4546                                 $meta->{$1} = $2;
4547                         }
4548                 }
4549                 my $data = $_;
4550                 chomp $data;
4551                 my $rev = substr($full_rev, 0, 8);
4552                 my $author = $meta->{'author'};
4553                 my %date = parse_date($meta->{'author-time'},
4554                                       $meta->{'author-tz'});
4555                 my $date = $date{'iso-tz'};
4556                 if ($group_size) {
4557                         $current_color = ++$current_color % $num_colors;
4558                 }
4559                 print "<tr class=\"$rev_color[$current_color]\">\n";
4560                 if ($group_size) {
4561                         print "<td class=\"sha1\"";
4562                         print " title=\"". esc_html($author) . ", $date\"";
4563                         print " rowspan=\"$group_size\"" if ($group_size > 1);
4564                         print ">";
4565                         print $cgi->a({-href => href(action=>"commit",
4566                                                      hash=>$full_rev,
4567                                                      file_name=>$file_name)},
4568                                       esc_html($rev));
4569                         print "</td>\n";
4570                 }
4571                 open (my $dd, "-|", git_cmd(), "rev-parse", "$full_rev^")
4572                         or die_error(500, "Open git-rev-parse failed");
4573                 my $parent_commit = <$dd>;
4574                 close $dd;
4575                 chomp($parent_commit);
4576                 my $blamed = href(action => 'blame',
4577                                   file_name => $meta->{'filename'},
4578                                   hash_base => $parent_commit);
4579                 print "<td class=\"linenr\">";
4580                 print $cgi->a({ -href => "$blamed#l$orig_lineno",
4581                                 -id => "l$lineno",
4582                                 -class => "linenr" },
4583                               esc_html($lineno));
4584                 print "</td>";
4585                 print "<td class=\"pre\">" . esc_html($data) . "</td>\n";
4586                 print "</tr>\n";
4587         }
4588         print "</table>\n";
4589         print "</div>";
4590         close $fd
4591                 or print "Reading blob failed\n";
4592         git_footer_html();
4593 }
4594
4595 sub git_tags {
4596         my $head = git_get_head_hash($project);
4597         git_header_html();
4598         git_print_page_nav('','', $head,undef,$head);
4599         git_print_header_div('summary', $project);
4600
4601         my @tagslist = git_get_tags_list();
4602         if (@tagslist) {
4603                 git_tags_body(\@tagslist);
4604         }
4605         git_footer_html();
4606 }
4607
4608 sub git_heads {
4609         my $head = git_get_head_hash($project);
4610         git_header_html();
4611         git_print_page_nav('','', $head,undef,$head);
4612         git_print_header_div('summary', $project);
4613
4614         my @headslist = git_get_heads_list();
4615         if (@headslist) {
4616                 git_heads_body(\@headslist, $head);
4617         }
4618         git_footer_html();
4619 }
4620
4621 sub git_blob_plain {
4622         my $type = shift;
4623         my $expires;
4624
4625         if (!defined $hash) {
4626                 if (defined $file_name) {
4627                         my $base = $hash_base || git_get_head_hash($project);
4628                         $hash = git_get_hash_by_path($base, $file_name, "blob")
4629                                 or die_error(404, "Cannot find file");
4630                 } else {
4631                         die_error(400, "No file name defined");
4632                 }
4633         } elsif ($hash =~ m/^[0-9a-fA-F]{40}$/) {
4634                 # blobs defined by non-textual hash id's can be cached
4635                 $expires = "+1d";
4636         }
4637
4638         open my $fd, "-|", git_cmd(), "cat-file", "blob", $hash
4639                 or die_error(500, "Open git-cat-file blob '$hash' failed");
4640
4641         # content-type (can include charset)
4642         $type = blob_contenttype($fd, $file_name, $type);
4643
4644         # "save as" filename, even when no $file_name is given
4645         my $save_as = "$hash";
4646         if (defined $file_name) {
4647                 $save_as = $file_name;
4648         } elsif ($type =~ m/^text\//) {
4649                 $save_as .= '.txt';
4650         }
4651
4652         print $cgi->header(
4653                 -type => $type,
4654                 -expires => $expires,
4655                 -content_disposition => 'inline; filename="' . $save_as . '"');
4656         undef $/;
4657         binmode STDOUT, ':raw';
4658         print <$fd>;
4659         binmode STDOUT, ':utf8'; # as set at the beginning of gitweb.cgi
4660         $/ = "\n";
4661         close $fd;
4662 }
4663
4664 sub git_blob {
4665         my $expires;
4666
4667         if (!defined $hash) {
4668                 if (defined $file_name) {
4669                         my $base = $hash_base || git_get_head_hash($project);
4670                         $hash = git_get_hash_by_path($base, $file_name, "blob")
4671                                 or die_error(404, "Cannot find file");
4672                 } else {
4673                         die_error(400, "No file name defined");
4674                 }
4675         } elsif ($hash =~ m/^[0-9a-fA-F]{40}$/) {
4676                 # blobs defined by non-textual hash id's can be cached
4677                 $expires = "+1d";
4678         }
4679
4680         my ($have_blame) = gitweb_check_feature('blame');
4681         open my $fd, "-|", git_cmd(), "cat-file", "blob", $hash
4682                 or die_error(500, "Couldn't cat $file_name, $hash");
4683         my $mimetype = blob_mimetype($fd, $file_name);
4684         if ($mimetype !~ m!^(?:text/|image/(?:gif|png|jpeg)$)! && -B $fd) {
4685                 close $fd;
4686                 return git_blob_plain($mimetype);
4687         }
4688         # we can have blame only for text/* mimetype
4689         $have_blame &&= ($mimetype =~ m!^text/!);
4690
4691         git_header_html(undef, $expires);
4692         my $formats_nav = '';
4693         if (defined $hash_base && (my %co = parse_commit($hash_base))) {
4694                 if (defined $file_name) {
4695                         if ($have_blame) {
4696                                 $formats_nav .=
4697                                         $cgi->a({-href => href(action=>"blame", -replay=>1)},
4698                                                 "blame") .
4699                                         " | ";
4700                         }
4701                         $formats_nav .=
4702                                 $cgi->a({-href => href(action=>"history", -replay=>1)},
4703                                         "history") .
4704                                 " | " .
4705                                 $cgi->a({-href => href(action=>"blob_plain", -replay=>1)},
4706                                         "raw") .
4707                                 " | " .
4708                                 $cgi->a({-href => href(action=>"blob",
4709                                                        hash_base=>"HEAD", file_name=>$file_name)},
4710                                         "HEAD");
4711                 } else {
4712                         $formats_nav .=
4713                                 $cgi->a({-href => href(action=>"blob_plain", -replay=>1)},
4714                                         "raw");
4715                 }
4716                 git_print_page_nav('','', $hash_base,$co{'tree'},$hash_base, $formats_nav);
4717                 git_print_header_div('commit', esc_html($co{'title'}), $hash_base);
4718         } else {
4719                 print "<div class=\"page_nav\">\n" .
4720                       "<br/><br/></div>\n" .
4721                       "<div class=\"title\">$hash</div>\n";
4722         }
4723         git_print_page_path($file_name, "blob", $hash_base);
4724         print "<div class=\"page_body\">\n";
4725         if ($mimetype =~ m!^image/!) {
4726                 print qq!<img type="$mimetype"!;
4727                 if ($file_name) {
4728                         print qq! alt="$file_name" title="$file_name"!;
4729                 }
4730                 print qq! src="! .
4731                       href(action=>"blob_plain", hash=>$hash,
4732                            hash_base=>$hash_base, file_name=>$file_name) .
4733                       qq!" />\n!;
4734         } else {
4735                 my $nr;
4736                 while (my $line = <$fd>) {
4737                         chomp $line;
4738                         $nr++;
4739                         $line = untabify($line);
4740                         printf "<div class=\"pre\"><a id=\"l%i\" href=\"#l%i\" class=\"linenr\">%4i</a> %s</div>\n",
4741                                $nr, $nr, $nr, esc_html($line, -nbsp=>1);
4742                 }
4743         }
4744         close $fd
4745                 or print "Reading blob failed.\n";
4746         print "</div>";
4747         git_footer_html();
4748 }
4749
4750 sub git_tree {
4751         if (!defined $hash_base) {
4752                 $hash_base = "HEAD";
4753         }
4754         if (!defined $hash) {
4755                 if (defined $file_name) {
4756                         $hash = git_get_hash_by_path($hash_base, $file_name, "tree");
4757                 } else {
4758                         $hash = $hash_base;
4759                 }
4760         }
4761         die_error(404, "No such tree") unless defined($hash);
4762         $/ = "\0";
4763         open my $fd, "-|", git_cmd(), "ls-tree", '-z', $hash
4764                 or die_error(500, "Open git-ls-tree failed");
4765         my @entries = map { chomp; $_ } <$fd>;
4766         close $fd or die_error(404, "Reading tree failed");
4767         $/ = "\n";
4768
4769         my $refs = git_get_references();
4770         my $ref = format_ref_marker($refs, $hash_base);
4771         git_header_html();
4772         my $basedir = '';
4773         my ($have_blame) = gitweb_check_feature('blame');
4774         if (defined $hash_base && (my %co = parse_commit($hash_base))) {
4775                 my @views_nav = ();
4776                 if (defined $file_name) {
4777                         push @views_nav,
4778                                 $cgi->a({-href => href(action=>"history", -replay=>1)},
4779                                         "history"),
4780                                 $cgi->a({-href => href(action=>"tree",
4781                                                        hash_base=>"HEAD", file_name=>$file_name)},
4782                                         "HEAD"),
4783                 }
4784                 my $snapshot_links = format_snapshot_links($hash);
4785                 if (defined $snapshot_links) {
4786                         # FIXME: Should be available when we have no hash base as well.
4787                         push @views_nav, $snapshot_links;
4788                 }
4789                 git_print_page_nav('tree','', $hash_base, undef, undef, join(' | ', @views_nav));
4790                 git_print_header_div('commit', esc_html($co{'title'}) . $ref, $hash_base);
4791         } else {
4792                 undef $hash_base;
4793                 print "<div class=\"page_nav\">\n";
4794                 print "<br/><br/></div>\n";
4795                 print "<div class=\"title\">$hash</div>\n";
4796         }
4797         if (defined $file_name) {
4798                 $basedir = $file_name;
4799                 if ($basedir ne '' && substr($basedir, -1) ne '/') {
4800                         $basedir .= '/';
4801                 }
4802                 git_print_page_path($file_name, 'tree', $hash_base);
4803         }
4804         print "<div class=\"page_body\">\n";
4805         print "<table class=\"tree\">\n";
4806         my $alternate = 1;
4807         # '..' (top directory) link if possible
4808         if (defined $hash_base &&
4809             defined $file_name && $file_name =~ m![^/]+$!) {
4810                 if ($alternate) {
4811                         print "<tr class=\"dark\">\n";
4812                 } else {
4813                         print "<tr class=\"light\">\n";
4814                 }
4815                 $alternate ^= 1;
4816
4817                 my $up = $file_name;
4818                 $up =~ s!/?[^/]+$!!;
4819                 undef $up unless $up;
4820                 # based on git_print_tree_entry
4821                 print '<td class="mode">' . mode_str('040000') . "</td>\n";
4822                 print '<td class="list">';
4823                 print $cgi->a({-href => href(action=>"tree", hash_base=>$hash_base,
4824                                              file_name=>$up)},
4825                               "..");
4826                 print "</td>\n";
4827                 print "<td class=\"link\"></td>\n";
4828
4829                 print "</tr>\n";
4830         }
4831         foreach my $line (@entries) {
4832                 my %t = parse_ls_tree_line($line, -z => 1);
4833
4834                 if ($alternate) {
4835                         print "<tr class=\"dark\">\n";
4836                 } else {
4837                         print "<tr class=\"light\">\n";
4838                 }
4839                 $alternate ^= 1;
4840
4841                 git_print_tree_entry(\%t, $basedir, $hash_base, $have_blame);
4842
4843                 print "</tr>\n";
4844         }
4845         print "</table>\n" .
4846               "</div>";
4847         git_footer_html();
4848 }
4849
4850 sub git_snapshot {
4851         my $format = $input_params{'snapshot_format'};
4852         if (!@snapshot_fmts) {
4853                 die_error(403, "Snapshots not allowed");
4854         }
4855         # default to first supported snapshot format
4856         $format ||= $snapshot_fmts[0];
4857         if ($format !~ m/^[a-z0-9]+$/) {
4858                 die_error(400, "Invalid snapshot format parameter");
4859         } elsif (!exists($known_snapshot_formats{$format})) {
4860                 die_error(400, "Unknown snapshot format");
4861         } elsif (!grep($_ eq $format, @snapshot_fmts)) {
4862                 die_error(403, "Unsupported snapshot format");
4863         }
4864
4865         if (!defined $hash) {
4866                 $hash = git_get_head_hash($project);
4867         }
4868
4869         my $name = $project;
4870         $name =~ s,([^/])/*\.git$,$1,;
4871         $name = basename($name);
4872         my $filename = to_utf8($name);
4873         $name =~ s/\047/\047\\\047\047/g;
4874         my $cmd;
4875         $filename .= "-$hash$known_snapshot_formats{$format}{'suffix'}";
4876         $cmd = quote_command(
4877                 git_cmd(), 'archive',
4878                 "--format=$known_snapshot_formats{$format}{'format'}",
4879                 "--prefix=$name/", $hash);
4880         if (exists $known_snapshot_formats{$format}{'compressor'}) {
4881                 $cmd .= ' | ' . quote_command(@{$known_snapshot_formats{$format}{'compressor'}});
4882         }
4883
4884         print $cgi->header(
4885                 -type => $known_snapshot_formats{$format}{'type'},
4886                 -content_disposition => 'inline; filename="' . "$filename" . '"',
4887                 -status => '200 OK');
4888
4889         open my $fd, "-|", $cmd
4890                 or die_error(500, "Execute git-archive failed");
4891         binmode STDOUT, ':raw';
4892         print <$fd>;
4893         binmode STDOUT, ':utf8'; # as set at the beginning of gitweb.cgi
4894         close $fd;
4895 }
4896
4897 sub git_log {
4898         my $head = git_get_head_hash($project);
4899         if (!defined $hash) {
4900                 $hash = $head;
4901         }
4902         if (!defined $page) {
4903                 $page = 0;
4904         }
4905         my $refs = git_get_references();
4906
4907         my @commitlist = parse_commits($hash, 101, (100 * $page));
4908
4909         my $paging_nav = format_paging_nav('log', $hash, $head, $page, $#commitlist >= 100);
4910
4911         git_header_html();
4912         git_print_page_nav('log','', $hash,undef,undef, $paging_nav);
4913
4914         if (!@commitlist) {
4915                 my %co = parse_commit($hash);
4916
4917                 git_print_header_div('summary', $project);
4918                 print "<div class=\"page_body\"> Last change $co{'age_string'}.<br/><br/></div>\n";
4919         }
4920         my $to = ($#commitlist >= 99) ? (99) : ($#commitlist);
4921         for (my $i = 0; $i <= $to; $i++) {
4922                 my %co = %{$commitlist[$i]};
4923                 next if !%co;
4924                 my $commit = $co{'id'};
4925                 my $ref = format_ref_marker($refs, $commit);
4926                 my %ad = parse_date($co{'author_epoch'});
4927                 git_print_header_div('commit',
4928                                "<span class=\"age\">$co{'age_string'}</span>" .
4929                                esc_html($co{'title'}) . $ref,
4930                                $commit);
4931                 print "<div class=\"title_text\">\n" .
4932                       "<div class=\"log_link\">\n" .
4933                       $cgi->a({-href => href(action=>"commit", hash=>$commit)}, "commit") .
4934                       " | " .
4935                       $cgi->a({-href => href(action=>"commitdiff", hash=>$commit)}, "commitdiff") .
4936                       " | " .
4937                       $cgi->a({-href => href(action=>"tree", hash=>$commit, hash_base=>$commit)}, "tree") .
4938                       "<br/>\n" .
4939                       "</div>\n" .
4940                       "<i>" . esc_html($co{'author_name'}) .  " [$ad{'rfc2822'}]</i><br/>\n" .
4941                       "</div>\n";
4942
4943                 print "<div class=\"log_body\">\n";
4944                 git_print_log($co{'comment'}, -final_empty_line=> 1);
4945                 print "</div>\n";
4946         }
4947         if ($#commitlist >= 100) {
4948                 print "<div class=\"page_nav\">\n";
4949                 print $cgi->a({-href => href(-replay=>1, page=>$page+1),
4950                                -accesskey => "n", -title => "Alt-n"}, "next");
4951                 print "</div>\n";
4952         }
4953         git_footer_html();
4954 }
4955
4956 sub git_commit {
4957         $hash ||= $hash_base || "HEAD";
4958         my %co = parse_commit($hash)
4959             or die_error(404, "Unknown commit object");
4960         my %ad = parse_date($co{'author_epoch'}, $co{'author_tz'});
4961         my %cd = parse_date($co{'committer_epoch'}, $co{'committer_tz'});
4962
4963         my $parent  = $co{'parent'};
4964         my $parents = $co{'parents'}; # listref
4965
4966         # we need to prepare $formats_nav before any parameter munging
4967         my $formats_nav;
4968         if (!defined $parent) {
4969                 # --root commitdiff
4970                 $formats_nav .= '(initial)';
4971         } elsif (@$parents == 1) {
4972                 # single parent commit
4973                 $formats_nav .=
4974                         '(parent: ' .
4975                         $cgi->a({-href => href(action=>"commit",
4976                                                hash=>$parent)},
4977                                 esc_html(substr($parent, 0, 7))) .
4978                         ')';
4979         } else {
4980                 # merge commit
4981                 $formats_nav .=
4982                         '(merge: ' .
4983                         join(' ', map {
4984                                 $cgi->a({-href => href(action=>"commit",
4985                                                        hash=>$_)},
4986                                         esc_html(substr($_, 0, 7)));
4987                         } @$parents ) .
4988                         ')';
4989         }
4990
4991         if (!defined $parent) {
4992                 $parent = "--root";
4993         }
4994         my @difftree;
4995         open my $fd, "-|", git_cmd(), "diff-tree", '-r', "--no-commit-id",
4996                 @diff_opts,
4997                 (@$parents <= 1 ? $parent : '-c'),
4998                 $hash, "--"
4999                 or die_error(500, "Open git-diff-tree failed");
5000         @difftree = map { chomp; $_ } <$fd>;
5001         close $fd or die_error(404, "Reading git-diff-tree failed");
5002
5003         # non-textual hash id's can be cached
5004         my $expires;
5005         if ($hash =~ m/^[0-9a-fA-F]{40}$/) {
5006                 $expires = "+1d";
5007         }
5008         my $refs = git_get_references();
5009         my $ref = format_ref_marker($refs, $co{'id'});
5010
5011         git_header_html(undef, $expires);
5012         git_print_page_nav('commit', '',
5013                            $hash, $co{'tree'}, $hash,
5014                            $formats_nav);
5015
5016         if (defined $co{'parent'}) {
5017                 git_print_header_div('commitdiff', esc_html($co{'title'}) . $ref, $hash);
5018         } else {
5019                 git_print_header_div('tree', esc_html($co{'title'}) . $ref, $co{'tree'}, $hash);
5020         }
5021         print "<div class=\"title_text\">\n" .
5022               "<table class=\"object_header\">\n";
5023         print "<tr><td>author</td><td>" . esc_html($co{'author'}) . "</td></tr>\n".
5024               "<tr>" .
5025               "<td></td><td> $ad{'rfc2822'}";
5026         if ($ad{'hour_local'} < 6) {
5027                 printf(" (<span class=\"atnight\">%02d:%02d</span> %s)",
5028                        $ad{'hour_local'}, $ad{'minute_local'}, $ad{'tz_local'});
5029         } else {
5030                 printf(" (%02d:%02d %s)",
5031                        $ad{'hour_local'}, $ad{'minute_local'}, $ad{'tz_local'});
5032         }
5033         print "</td>" .
5034               "</tr>\n";
5035         print "<tr><td>committer</td><td>" . esc_html($co{'committer'}) . "</td></tr>\n";
5036         print "<tr><td></td><td> $cd{'rfc2822'}" .
5037               sprintf(" (%02d:%02d %s)", $cd{'hour_local'}, $cd{'minute_local'}, $cd{'tz_local'}) .
5038               "</td></tr>\n";
5039         print "<tr><td>commit</td><td class=\"sha1\">$co{'id'}</td></tr>\n";
5040         print "<tr>" .
5041               "<td>tree</td>" .
5042               "<td class=\"sha1\">" .
5043               $cgi->a({-href => href(action=>"tree", hash=>$co{'tree'}, hash_base=>$hash),
5044                        class => "list"}, $co{'tree'}) .
5045               "</td>" .
5046               "<td class=\"link\">" .
5047               $cgi->a({-href => href(action=>"tree", hash=>$co{'tree'}, hash_base=>$hash)},
5048                       "tree");
5049         my $snapshot_links = format_snapshot_links($hash);
5050         if (defined $snapshot_links) {
5051                 print " | " . $snapshot_links;
5052         }
5053         print "</td>" .
5054               "</tr>\n";
5055
5056         foreach my $par (@$parents) {
5057                 print "<tr>" .
5058                       "<td>parent</td>" .
5059                       "<td class=\"sha1\">" .
5060                       $cgi->a({-href => href(action=>"commit", hash=>$par),
5061                                class => "list"}, $par) .
5062                       "</td>" .
5063                       "<td class=\"link\">" .
5064                       $cgi->a({-href => href(action=>"commit", hash=>$par)}, "commit") .
5065                       " | " .
5066                       $cgi->a({-href => href(action=>"commitdiff", hash=>$hash, hash_parent=>$par)}, "diff") .
5067                       "</td>" .
5068                       "</tr>\n";
5069         }
5070         print "</table>".
5071               "</div>\n";
5072
5073         print "<div class=\"page_body\">\n";
5074         git_print_log($co{'comment'});
5075         print "</div>\n";
5076
5077         git_difftree_body(\@difftree, $hash, @$parents);
5078
5079         git_footer_html();
5080 }
5081
5082 sub git_object {
5083         # object is defined by:
5084         # - hash or hash_base alone
5085         # - hash_base and file_name
5086         my $type;
5087
5088         # - hash or hash_base alone
5089         if ($hash || ($hash_base && !defined $file_name)) {
5090                 my $object_id = $hash || $hash_base;
5091
5092                 open my $fd, "-|", quote_command(
5093                         git_cmd(), 'cat-file', '-t', $object_id) . ' 2> /dev/null'
5094                         or die_error(404, "Object does not exist");
5095                 $type = <$fd>;
5096                 chomp $type;
5097                 close $fd
5098                         or die_error(404, "Object does not exist");
5099
5100         # - hash_base and file_name
5101         } elsif ($hash_base && defined $file_name) {
5102                 $file_name =~ s,/+$,,;
5103
5104                 system(git_cmd(), "cat-file", '-e', $hash_base) == 0
5105                         or die_error(404, "Base object does not exist");
5106
5107                 # here errors should not hapen
5108                 open my $fd, "-|", git_cmd(), "ls-tree", $hash_base, "--", $file_name
5109                         or die_error(500, "Open git-ls-tree failed");
5110                 my $line = <$fd>;
5111                 close $fd;
5112
5113                 #'100644 blob 0fa3f3a66fb6a137f6ec2c19351ed4d807070ffa  panic.c'
5114                 unless ($line && $line =~ m/^([0-9]+) (.+) ([0-9a-fA-F]{40})\t/) {
5115                         die_error(404, "File or directory for given base does not exist");
5116                 }
5117                 $type = $2;
5118                 $hash = $3;
5119         } else {
5120                 die_error(400, "Not enough information to find object");
5121         }
5122
5123         print $cgi->redirect(-uri => href(action=>$type, -full=>1,
5124                                           hash=>$hash, hash_base=>$hash_base,
5125                                           file_name=>$file_name),
5126                              -status => '302 Found');
5127 }
5128
5129 sub git_blobdiff {
5130         my $format = shift || 'html';
5131
5132         my $fd;
5133         my @difftree;
5134         my %diffinfo;
5135         my $expires;
5136
5137         # preparing $fd and %diffinfo for git_patchset_body
5138         # new style URI
5139         if (defined $hash_base && defined $hash_parent_base) {
5140                 if (defined $file_name) {
5141                         # read raw output
5142                         open $fd, "-|", git_cmd(), "diff-tree", '-r', @diff_opts,
5143                                 $hash_parent_base, $hash_base,
5144                                 "--", (defined $file_parent ? $file_parent : ()), $file_name
5145                                 or die_error(500, "Open git-diff-tree failed");
5146                         @difftree = map { chomp; $_ } <$fd>;
5147                         close $fd
5148                                 or die_error(404, "Reading git-diff-tree failed");
5149                         @difftree
5150                                 or die_error(404, "Blob diff not found");
5151
5152                 } elsif (defined $hash &&
5153                          $hash =~ /[0-9a-fA-F]{40}/) {
5154                         # try to find filename from $hash
5155
5156                         # read filtered raw output
5157                         open $fd, "-|", git_cmd(), "diff-tree", '-r', @diff_opts,
5158                                 $hash_parent_base, $hash_base, "--"
5159                                 or die_error(500, "Open git-diff-tree failed");
5160                         @difftree =
5161                                 # ':100644 100644 03b21826... 3b93d5e7... M     ls-files.c'
5162                                 # $hash == to_id
5163                                 grep { /^:[0-7]{6} [0-7]{6} [0-9a-fA-F]{40} $hash/ }
5164                                 map { chomp; $_ } <$fd>;
5165                         close $fd
5166                                 or die_error(404, "Reading git-diff-tree failed");
5167                         @difftree
5168                                 or die_error(404, "Blob diff not found");
5169
5170                 } else {
5171                         die_error(400, "Missing one of the blob diff parameters");
5172                 }
5173
5174                 if (@difftree > 1) {
5175                         die_error(400, "Ambiguous blob diff specification");
5176                 }
5177
5178                 %diffinfo = parse_difftree_raw_line($difftree[0]);
5179                 $file_parent ||= $diffinfo{'from_file'} || $file_name;
5180                 $file_name   ||= $diffinfo{'to_file'};
5181
5182                 $hash_parent ||= $diffinfo{'from_id'};
5183                 $hash        ||= $diffinfo{'to_id'};
5184
5185                 # non-textual hash id's can be cached
5186                 if ($hash_base =~ m/^[0-9a-fA-F]{40}$/ &&
5187                     $hash_parent_base =~ m/^[0-9a-fA-F]{40}$/) {
5188                         $expires = '+1d';
5189                 }
5190
5191                 # open patch output
5192                 open $fd, "-|", git_cmd(), "diff-tree", '-r', @diff_opts,
5193                         '-p', ($format eq 'html' ? "--full-index" : ()),
5194                         $hash_parent_base, $hash_base,
5195                         "--", (defined $file_parent ? $file_parent : ()), $file_name
5196                         or die_error(500, "Open git-diff-tree failed");
5197         }
5198
5199         # old/legacy style URI
5200         if (!%diffinfo && # if new style URI failed
5201             defined $hash && defined $hash_parent) {
5202                 # fake git-diff-tree raw output
5203                 $diffinfo{'from_mode'} = $diffinfo{'to_mode'} = "blob";
5204                 $diffinfo{'from_id'} = $hash_parent;
5205                 $diffinfo{'to_id'}   = $hash;
5206                 if (defined $file_name) {
5207                         if (defined $file_parent) {
5208                                 $diffinfo{'status'} = '2';
5209                                 $diffinfo{'from_file'} = $file_parent;
5210                                 $diffinfo{'to_file'}   = $file_name;
5211                         } else { # assume not renamed
5212                                 $diffinfo{'status'} = '1';
5213                                 $diffinfo{'from_file'} = $file_name;
5214                                 $diffinfo{'to_file'}   = $file_name;
5215                         }
5216                 } else { # no filename given
5217                         $diffinfo{'status'} = '2';
5218                         $diffinfo{'from_file'} = $hash_parent;
5219                         $diffinfo{'to_file'}   = $hash;
5220                 }
5221
5222                 # non-textual hash id's can be cached
5223                 if ($hash =~ m/^[0-9a-fA-F]{40}$/ &&
5224                     $hash_parent =~ m/^[0-9a-fA-F]{40}$/) {
5225                         $expires = '+1d';
5226                 }
5227
5228                 # open patch output
5229                 open $fd, "-|", git_cmd(), "diff", @diff_opts,
5230                         '-p', ($format eq 'html' ? "--full-index" : ()),
5231                         $hash_parent, $hash, "--"
5232                         or die_error(500, "Open git-diff failed");
5233         } else  {
5234                 die_error(400, "Missing one of the blob diff parameters")
5235                         unless %diffinfo;
5236         }
5237
5238         # header
5239         if ($format eq 'html') {
5240                 my $formats_nav =
5241                         $cgi->a({-href => href(action=>"blobdiff_plain", -replay=>1)},
5242                                 "raw");
5243                 git_header_html(undef, $expires);
5244                 if (defined $hash_base && (my %co = parse_commit($hash_base))) {
5245                         git_print_page_nav('','', $hash_base,$co{'tree'},$hash_base, $formats_nav);
5246                         git_print_header_div('commit', esc_html($co{'title'}), $hash_base);
5247                 } else {
5248                         print "<div class=\"page_nav\"><br/>$formats_nav<br/></div>\n";
5249                         print "<div class=\"title\">$hash vs $hash_parent</div>\n";
5250                 }
5251                 if (defined $file_name) {
5252                         git_print_page_path($file_name, "blob", $hash_base);
5253                 } else {
5254                         print "<div class=\"page_path\"></div>\n";
5255                 }
5256
5257         } elsif ($format eq 'plain') {
5258                 print $cgi->header(
5259                         -type => 'text/plain',
5260                         -charset => 'utf-8',
5261                         -expires => $expires,
5262                         -content_disposition => 'inline; filename="' . "$file_name" . '.patch"');
5263
5264                 print "X-Git-Url: " . $cgi->self_url() . "\n\n";
5265
5266         } else {
5267                 die_error(400, "Unknown blobdiff format");
5268         }
5269
5270         # patch
5271         if ($format eq 'html') {
5272                 print "<div class=\"page_body\">\n";
5273
5274                 git_patchset_body($fd, [ \%diffinfo ], $hash_base, $hash_parent_base);
5275                 close $fd;
5276
5277                 print "</div>\n"; # class="page_body"
5278                 git_footer_html();
5279
5280         } else {
5281                 while (my $line = <$fd>) {
5282                         $line =~ s!a/($hash|$hash_parent)!'a/'.esc_path($diffinfo{'from_file'})!eg;
5283                         $line =~ s!b/($hash|$hash_parent)!'b/'.esc_path($diffinfo{'to_file'})!eg;
5284
5285                         print $line;
5286
5287                         last if $line =~ m!^\+\+\+!;
5288                 }
5289                 local $/ = undef;
5290                 print <$fd>;
5291                 close $fd;
5292         }
5293 }
5294
5295 sub git_blobdiff_plain {
5296         git_blobdiff('plain');
5297 }
5298
5299 sub git_commitdiff {
5300         my $format = shift || 'html';
5301         $hash ||= $hash_base || "HEAD";
5302         my %co = parse_commit($hash)
5303             or die_error(404, "Unknown commit object");
5304
5305         # choose format for commitdiff for merge
5306         if (! defined $hash_parent && @{$co{'parents'}} > 1) {
5307                 $hash_parent = '--cc';
5308         }
5309         # we need to prepare $formats_nav before almost any parameter munging
5310         my $formats_nav;
5311         if ($format eq 'html') {
5312                 $formats_nav =
5313                         $cgi->a({-href => href(action=>"commitdiff_plain", -replay=>1)},
5314                                 "raw");
5315
5316                 if (defined $hash_parent &&
5317                     $hash_parent ne '-c' && $hash_parent ne '--cc') {
5318                         # commitdiff with two commits given
5319                         my $hash_parent_short = $hash_parent;
5320                         if ($hash_parent =~ m/^[0-9a-fA-F]{40}$/) {
5321                                 $hash_parent_short = substr($hash_parent, 0, 7);
5322                         }
5323                         $formats_nav .=
5324                                 ' (from';
5325                         for (my $i = 0; $i < @{$co{'parents'}}; $i++) {
5326                                 if ($co{'parents'}[$i] eq $hash_parent) {
5327                                         $formats_nav .= ' parent ' . ($i+1);
5328                                         last;
5329                                 }
5330                         }
5331                         $formats_nav .= ': ' .
5332                                 $cgi->a({-href => href(action=>"commitdiff",
5333                                                        hash=>$hash_parent)},
5334                                         esc_html($hash_parent_short)) .
5335                                 ')';
5336                 } elsif (!$co{'parent'}) {
5337                         # --root commitdiff
5338                         $formats_nav .= ' (initial)';
5339                 } elsif (scalar @{$co{'parents'}} == 1) {
5340                         # single parent commit
5341                         $formats_nav .=
5342                                 ' (parent: ' .
5343                                 $cgi->a({-href => href(action=>"commitdiff",
5344                                                        hash=>$co{'parent'})},
5345                                         esc_html(substr($co{'parent'}, 0, 7))) .
5346                                 ')';
5347                 } else {
5348                         # merge commit
5349                         if ($hash_parent eq '--cc') {
5350                                 $formats_nav .= ' | ' .
5351                                         $cgi->a({-href => href(action=>"commitdiff",
5352                                                                hash=>$hash, hash_parent=>'-c')},
5353                                                 'combined');
5354                         } else { # $hash_parent eq '-c'
5355                                 $formats_nav .= ' | ' .
5356                                         $cgi->a({-href => href(action=>"commitdiff",
5357                                                                hash=>$hash, hash_parent=>'--cc')},
5358                                                 'compact');
5359                         }
5360                         $formats_nav .=
5361                                 ' (merge: ' .
5362                                 join(' ', map {
5363                                         $cgi->a({-href => href(action=>"commitdiff",
5364                                                                hash=>$_)},
5365                                                 esc_html(substr($_, 0, 7)));
5366                                 } @{$co{'parents'}} ) .
5367                                 ')';
5368                 }
5369         }
5370
5371         my $hash_parent_param = $hash_parent;
5372         if (!defined $hash_parent_param) {
5373                 # --cc for multiple parents, --root for parentless
5374                 $hash_parent_param =
5375                         @{$co{'parents'}} > 1 ? '--cc' : $co{'parent'} || '--root';
5376         }
5377
5378         # read commitdiff
5379         my $fd;
5380         my @difftree;
5381         if ($format eq 'html') {
5382                 open $fd, "-|", git_cmd(), "diff-tree", '-r', @diff_opts,
5383                         "--no-commit-id", "--patch-with-raw", "--full-index",
5384                         $hash_parent_param, $hash, "--"
5385                         or die_error(500, "Open git-diff-tree failed");
5386
5387                 while (my $line = <$fd>) {
5388                         chomp $line;
5389                         # empty line ends raw part of diff-tree output
5390                         last unless $line;
5391                         push @difftree, scalar parse_difftree_raw_line($line);
5392                 }
5393
5394         } elsif ($format eq 'plain') {
5395                 open $fd, "-|", git_cmd(), "diff-tree", '-r', @diff_opts,
5396                         '-p', $hash_parent_param, $hash, "--"
5397                         or die_error(500, "Open git-diff-tree failed");
5398
5399         } else {
5400                 die_error(400, "Unknown commitdiff format");
5401         }
5402
5403         # non-textual hash id's can be cached
5404         my $expires;
5405         if ($hash =~ m/^[0-9a-fA-F]{40}$/) {
5406                 $expires = "+1d";
5407         }
5408
5409         # write commit message
5410         if ($format eq 'html') {
5411                 my $refs = git_get_references();
5412                 my $ref = format_ref_marker($refs, $co{'id'});
5413
5414                 git_header_html(undef, $expires);
5415                 git_print_page_nav('commitdiff','', $hash,$co{'tree'},$hash, $formats_nav);
5416                 git_print_header_div('commit', esc_html($co{'title'}) . $ref, $hash);
5417                 git_print_authorship(\%co);
5418                 print "<div class=\"page_body\">\n";
5419                 if (@{$co{'comment'}} > 1) {
5420                         print "<div class=\"log\">\n";
5421                         git_print_log($co{'comment'}, -final_empty_line=> 1, -remove_title => 1);
5422                         print "</div>\n"; # class="log"
5423                 }
5424
5425         } elsif ($format eq 'plain') {
5426                 my $refs = git_get_references("tags");
5427                 my $tagname = git_get_rev_name_tags($hash);
5428                 my $filename = basename($project) . "-$hash.patch";
5429
5430                 print $cgi->header(
5431                         -type => 'text/plain',
5432                         -charset => 'utf-8',
5433                         -expires => $expires,
5434                         -content_disposition => 'inline; filename="' . "$filename" . '"');
5435                 my %ad = parse_date($co{'author_epoch'}, $co{'author_tz'});
5436                 print "From: " . to_utf8($co{'author'}) . "\n";
5437                 print "Date: $ad{'rfc2822'} ($ad{'tz_local'})\n";
5438                 print "Subject: " . to_utf8($co{'title'}) . "\n";
5439
5440                 print "X-Git-Tag: $tagname\n" if $tagname;
5441                 print "X-Git-Url: " . $cgi->self_url() . "\n\n";
5442
5443                 foreach my $line (@{$co{'comment'}}) {
5444                         print to_utf8($line) . "\n";
5445                 }
5446                 print "---\n\n";
5447         }
5448
5449         # write patch
5450         if ($format eq 'html') {
5451                 my $use_parents = !defined $hash_parent ||
5452                         $hash_parent eq '-c' || $hash_parent eq '--cc';
5453                 git_difftree_body(\@difftree, $hash,
5454                                   $use_parents ? @{$co{'parents'}} : $hash_parent);
5455                 print "<br/>\n";
5456
5457                 git_patchset_body($fd, \@difftree, $hash,
5458                                   $use_parents ? @{$co{'parents'}} : $hash_parent);
5459                 close $fd;
5460                 print "</div>\n"; # class="page_body"
5461                 git_footer_html();
5462
5463         } elsif ($format eq 'plain') {
5464                 local $/ = undef;
5465                 print <$fd>;
5466                 close $fd
5467                         or print "Reading git-diff-tree failed\n";
5468         }
5469 }
5470
5471 sub git_commitdiff_plain {
5472         git_commitdiff('plain');
5473 }
5474
5475 sub git_history {
5476         if (!defined $hash_base) {
5477                 $hash_base = git_get_head_hash($project);
5478         }
5479         if (!defined $page) {
5480                 $page = 0;
5481         }
5482         my $ftype;
5483         my %co = parse_commit($hash_base)
5484             or die_error(404, "Unknown commit object");
5485
5486         my $refs = git_get_references();
5487         my $limit = sprintf("--max-count=%i", (100 * ($page+1)));
5488
5489         my @commitlist = parse_commits($hash_base, 101, (100 * $page),
5490                                        $file_name, "--full-history")
5491             or die_error(404, "No such file or directory on given branch");
5492
5493         if (!defined $hash && defined $file_name) {
5494                 # some commits could have deleted file in question,
5495                 # and not have it in tree, but one of them has to have it
5496                 for (my $i = 0; $i <= @commitlist; $i++) {
5497                         $hash = git_get_hash_by_path($commitlist[$i]{'id'}, $file_name);
5498                         last if defined $hash;
5499                 }
5500         }
5501         if (defined $hash) {
5502                 $ftype = git_get_type($hash);
5503         }
5504         if (!defined $ftype) {
5505                 die_error(500, "Unknown type of object");
5506         }
5507
5508         my $paging_nav = '';
5509         if ($page > 0) {
5510                 $paging_nav .=
5511                         $cgi->a({-href => href(action=>"history", hash=>$hash, hash_base=>$hash_base,
5512                                                file_name=>$file_name)},
5513                                 "first");
5514                 $paging_nav .= " &sdot; " .
5515                         $cgi->a({-href => href(-replay=>1, page=>$page-1),
5516                                  -accesskey => "p", -title => "Alt-p"}, "prev");
5517         } else {
5518                 $paging_nav .= "first";
5519                 $paging_nav .= " &sdot; prev";
5520         }
5521         my $next_link = '';
5522         if ($#commitlist >= 100) {
5523                 $next_link =
5524                         $cgi->a({-href => href(-replay=>1, page=>$page+1),
5525                                  -accesskey => "n", -title => "Alt-n"}, "next");
5526                 $paging_nav .= " &sdot; $next_link";
5527         } else {
5528                 $paging_nav .= " &sdot; next";
5529         }
5530
5531         git_header_html();
5532         git_print_page_nav('history','', $hash_base,$co{'tree'},$hash_base, $paging_nav);
5533         git_print_header_div('commit', esc_html($co{'title'}), $hash_base);
5534         git_print_page_path($file_name, $ftype, $hash_base);
5535
5536         git_history_body(\@commitlist, 0, 99,
5537                          $refs, $hash_base, $ftype, $next_link);
5538
5539         git_footer_html();
5540 }
5541
5542 sub git_search {
5543         gitweb_check_feature('search') or die_error(403, "Search is disabled");
5544         if (!defined $searchtext) {
5545                 die_error(400, "Text field is empty");
5546         }
5547         if (!defined $hash) {
5548                 $hash = git_get_head_hash($project);
5549         }
5550         my %co = parse_commit($hash);
5551         if (!%co) {
5552                 die_error(404, "Unknown commit object");
5553         }
5554         if (!defined $page) {
5555                 $page = 0;
5556         }
5557
5558         $searchtype ||= 'commit';
5559         if ($searchtype eq 'pickaxe') {
5560                 # pickaxe may take all resources of your box and run for several minutes
5561                 # with every query - so decide by yourself how public you make this feature
5562                 gitweb_check_feature('pickaxe')
5563                     or die_error(403, "Pickaxe is disabled");
5564         }
5565         if ($searchtype eq 'grep') {
5566                 gitweb_check_feature('grep')
5567                     or die_error(403, "Grep is disabled");
5568         }
5569
5570         git_header_html();
5571
5572         if ($searchtype eq 'commit' or $searchtype eq 'author' or $searchtype eq 'committer') {
5573                 my $greptype;
5574                 if ($searchtype eq 'commit') {
5575                         $greptype = "--grep=";
5576                 } elsif ($searchtype eq 'author') {
5577                         $greptype = "--author=";
5578                 } elsif ($searchtype eq 'committer') {
5579                         $greptype = "--committer=";
5580                 }
5581                 $greptype .= $searchtext;
5582                 my @commitlist = parse_commits($hash, 101, (100 * $page), undef,
5583                                                $greptype, '--regexp-ignore-case',
5584                                                $search_use_regexp ? '--extended-regexp' : '--fixed-strings');
5585
5586                 my $paging_nav = '';
5587                 if ($page > 0) {
5588                         $paging_nav .=
5589                                 $cgi->a({-href => href(action=>"search", hash=>$hash,
5590                                                        searchtext=>$searchtext,
5591                                                        searchtype=>$searchtype)},
5592                                         "first");
5593                         $paging_nav .= " &sdot; " .
5594                                 $cgi->a({-href => href(-replay=>1, page=>$page-1),
5595                                          -accesskey => "p", -title => "Alt-p"}, "prev");
5596                 } else {
5597                         $paging_nav .= "first";
5598                         $paging_nav .= " &sdot; prev";
5599                 }
5600                 my $next_link = '';
5601                 if ($#commitlist >= 100) {
5602                         $next_link =
5603                                 $cgi->a({-href => href(-replay=>1, page=>$page+1),
5604                                          -accesskey => "n", -title => "Alt-n"}, "next");
5605                         $paging_nav .= " &sdot; $next_link";
5606                 } else {
5607                         $paging_nav .= " &sdot; next";
5608                 }
5609
5610                 if ($#commitlist >= 100) {
5611                 }
5612
5613                 git_print_page_nav('','', $hash,$co{'tree'},$hash, $paging_nav);
5614                 git_print_header_div('commit', esc_html($co{'title'}), $hash);
5615                 git_search_grep_body(\@commitlist, 0, 99, $next_link);
5616         }
5617
5618         if ($searchtype eq 'pickaxe') {
5619                 git_print_page_nav('','', $hash,$co{'tree'},$hash);
5620                 git_print_header_div('commit', esc_html($co{'title'}), $hash);
5621
5622                 print "<table class=\"pickaxe search\">\n";
5623                 my $alternate = 1;
5624                 $/ = "\n";
5625                 open my $fd, '-|', git_cmd(), '--no-pager', 'log', @diff_opts,
5626                         '--pretty=format:%H', '--no-abbrev', '--raw', "-S$searchtext",
5627                         ($search_use_regexp ? '--pickaxe-regex' : ());
5628                 undef %co;
5629                 my @files;
5630                 while (my $line = <$fd>) {
5631                         chomp $line;
5632                         next unless $line;
5633
5634                         my %set = parse_difftree_raw_line($line);
5635                         if (defined $set{'commit'}) {
5636                                 # finish previous commit
5637                                 if (%co) {
5638                                         print "</td>\n" .
5639                                               "<td class=\"link\">" .
5640                                               $cgi->a({-href => href(action=>"commit", hash=>$co{'id'})}, "commit") .
5641                                               " | " .
5642                                               $cgi->a({-href => href(action=>"tree", hash=>$co{'tree'}, hash_base=>$co{'id'})}, "tree");
5643                                         print "</td>\n" .
5644                                               "</tr>\n";
5645                                 }
5646
5647                                 if ($alternate) {
5648                                         print "<tr class=\"dark\">\n";
5649                                 } else {
5650                                         print "<tr class=\"light\">\n";
5651                                 }
5652                                 $alternate ^= 1;
5653                                 %co = parse_commit($set{'commit'});
5654                                 my $author = chop_and_escape_str($co{'author_name'}, 15, 5);
5655                                 print "<td title=\"$co{'age_string_age'}\"><i>$co{'age_string_date'}</i></td>\n" .
5656                                       "<td><i>$author</i></td>\n" .
5657                                       "<td>" .
5658                                       $cgi->a({-href => href(action=>"commit", hash=>$co{'id'}),
5659                                               -class => "list subject"},
5660                                               chop_and_escape_str($co{'title'}, 50) . "<br/>");
5661                         } elsif (defined $set{'to_id'}) {
5662                                 next if ($set{'to_id'} =~ m/^0{40}$/);
5663
5664                                 print $cgi->a({-href => href(action=>"blob", hash_base=>$co{'id'},
5665                                                              hash=>$set{'to_id'}, file_name=>$set{'to_file'}),
5666                                               -class => "list"},
5667                                               "<span class=\"match\">" . esc_path($set{'file'}) . "</span>") .
5668                                       "<br/>\n";
5669                         }
5670                 }
5671                 close $fd;
5672
5673                 # finish last commit (warning: repetition!)
5674                 if (%co) {
5675                         print "</td>\n" .
5676                               "<td class=\"link\">" .
5677                               $cgi->a({-href => href(action=>"commit", hash=>$co{'id'})}, "commit") .
5678                               " | " .
5679                               $cgi->a({-href => href(action=>"tree", hash=>$co{'tree'}, hash_base=>$co{'id'})}, "tree");
5680                         print "</td>\n" .
5681                               "</tr>\n";
5682                 }
5683
5684                 print "</table>\n";
5685         }
5686
5687         if ($searchtype eq 'grep') {
5688                 git_print_page_nav('','', $hash,$co{'tree'},$hash);
5689                 git_print_header_div('commit', esc_html($co{'title'}), $hash);
5690
5691                 print "<table class=\"grep_search\">\n";
5692                 my $alternate = 1;
5693                 my $matches = 0;
5694                 $/ = "\n";
5695                 open my $fd, "-|", git_cmd(), 'grep', '-n',
5696                         $search_use_regexp ? ('-E', '-i') : '-F',
5697                         $searchtext, $co{'tree'};
5698                 my $lastfile = '';
5699                 while (my $line = <$fd>) {
5700                         chomp $line;
5701                         my ($file, $lno, $ltext, $binary);
5702                         last if ($matches++ > 1000);
5703                         if ($line =~ /^Binary file (.+) matches$/) {
5704                                 $file = $1;
5705                                 $binary = 1;
5706                         } else {
5707                                 (undef, $file, $lno, $ltext) = split(/:/, $line, 4);
5708                         }
5709                         if ($file ne $lastfile) {
5710                                 $lastfile and print "</td></tr>\n";
5711                                 if ($alternate++) {
5712                                         print "<tr class=\"dark\">\n";
5713                                 } else {
5714                                         print "<tr class=\"light\">\n";
5715                                 }
5716                                 print "<td class=\"list\">".
5717                                         $cgi->a({-href => href(action=>"blob", hash=>$co{'hash'},
5718                                                                file_name=>"$file"),
5719                                                 -class => "list"}, esc_path($file));
5720                                 print "</td><td>\n";
5721                                 $lastfile = $file;
5722                         }
5723                         if ($binary) {
5724                                 print "<div class=\"binary\">Binary file</div>\n";
5725                         } else {
5726                                 $ltext = untabify($ltext);
5727                                 if ($ltext =~ m/^(.*)($search_regexp)(.*)$/i) {
5728                                         $ltext = esc_html($1, -nbsp=>1);
5729                                         $ltext .= '<span class="match">';
5730                                         $ltext .= esc_html($2, -nbsp=>1);
5731                                         $ltext .= '</span>';
5732                                         $ltext .= esc_html($3, -nbsp=>1);
5733                                 } else {
5734                                         $ltext = esc_html($ltext, -nbsp=>1);
5735                                 }
5736                                 print "<div class=\"pre\">" .
5737                                         $cgi->a({-href => href(action=>"blob", hash=>$co{'hash'},
5738                                                                file_name=>"$file").'#l'.$lno,
5739                                                 -class => "linenr"}, sprintf('%4i', $lno))
5740                                         . ' ' .  $ltext . "</div>\n";
5741                         }
5742                 }
5743                 if ($lastfile) {
5744                         print "</td></tr>\n";
5745                         if ($matches > 1000) {
5746                                 print "<div class=\"diff nodifferences\">Too many matches, listing trimmed</div>\n";
5747                         }
5748                 } else {
5749                         print "<div class=\"diff nodifferences\">No matches found</div>\n";
5750                 }
5751                 close $fd;
5752
5753                 print "</table>\n";
5754         }
5755         git_footer_html();
5756 }
5757
5758 sub git_search_help {
5759         git_header_html();
5760         git_print_page_nav('','', $hash,$hash,$hash);
5761         print <<EOT;
5762 <p><strong>Pattern</strong> is by default a normal string that is matched precisely (but without
5763 regard to case, except in the case of pickaxe). However, when you check the <em>re</em> checkbox,
5764 the pattern entered is recognized as the POSIX extended
5765 <a href="http://en.wikipedia.org/wiki/Regular_expression">regular expression</a> (also case
5766 insensitive).</p>
5767 <dl>
5768 <dt><b>commit</b></dt>
5769 <dd>The commit messages and authorship information will be scanned for the given pattern.</dd>
5770 EOT
5771         my ($have_grep) = gitweb_check_feature('grep');
5772         if ($have_grep) {
5773                 print <<EOT;
5774 <dt><b>grep</b></dt>
5775 <dd>All files in the currently selected tree (HEAD unless you are explicitly browsing
5776     a different one) are searched for the given pattern. On large trees, this search can take
5777 a while and put some strain on the server, so please use it with some consideration. Note that
5778 due to git-grep peculiarity, currently if regexp mode is turned off, the matches are
5779 case-sensitive.</dd>
5780 EOT
5781         }
5782         print <<EOT;
5783 <dt><b>author</b></dt>
5784 <dd>Name and e-mail of the change author and date of birth of the patch will be scanned for the given pattern.</dd>
5785 <dt><b>committer</b></dt>
5786 <dd>Name and e-mail of the committer and date of commit will be scanned for the given pattern.</dd>
5787 EOT
5788         my ($have_pickaxe) = gitweb_check_feature('pickaxe');
5789         if ($have_pickaxe) {
5790                 print <<EOT;
5791 <dt><b>pickaxe</b></dt>
5792 <dd>All commits that caused the string to appear or disappear from any file (changes that
5793 added, removed or "modified" the string) will be listed. This search can take a while and
5794 takes a lot of strain on the server, so please use it wisely. Note that since you may be
5795 interested even in changes just changing the case as well, this search is case sensitive.</dd>
5796 EOT
5797         }
5798         print "</dl>\n";
5799         git_footer_html();
5800 }
5801
5802 sub git_shortlog {
5803         my $head = git_get_head_hash($project);
5804         if (!defined $hash) {
5805                 $hash = $head;
5806         }
5807         if (!defined $page) {
5808                 $page = 0;
5809         }
5810         my $refs = git_get_references();
5811
5812         my $commit_hash = $hash;
5813         if (defined $hash_parent) {
5814                 $commit_hash = "$hash_parent..$hash";
5815         }
5816         my @commitlist = parse_commits($commit_hash, 101, (100 * $page));
5817
5818         my $paging_nav = format_paging_nav('shortlog', $hash, $head, $page, $#commitlist >= 100);
5819         my $next_link = '';
5820         if ($#commitlist >= 100) {
5821                 $next_link =
5822                         $cgi->a({-href => href(-replay=>1, page=>$page+1),
5823                                  -accesskey => "n", -title => "Alt-n"}, "next");
5824         }
5825
5826         git_header_html();
5827         git_print_page_nav('shortlog','', $hash,$hash,$hash, $paging_nav);
5828         git_print_header_div('summary', $project);
5829
5830         git_shortlog_body(\@commitlist, 0, 99, $refs, $next_link);
5831
5832         git_footer_html();
5833 }
5834
5835 ## ......................................................................
5836 ## feeds (RSS, Atom; OPML)
5837
5838 sub git_feed {
5839         my $format = shift || 'atom';
5840         my ($have_blame) = gitweb_check_feature('blame');
5841
5842         # Atom: http://www.atomenabled.org/developers/syndication/
5843         # RSS:  http://www.notestips.com/80256B3A007F2692/1/NAMO5P9UPQ
5844         if ($format ne 'rss' && $format ne 'atom') {
5845                 die_error(400, "Unknown web feed format");
5846         }
5847
5848         # log/feed of current (HEAD) branch, log of given branch, history of file/directory
5849         my $head = $hash || 'HEAD';
5850         my @commitlist = parse_commits($head, 150, 0, $file_name);
5851
5852         my %latest_commit;
5853         my %latest_date;
5854         my $content_type = "application/$format+xml";
5855         if (defined $cgi->http('HTTP_ACCEPT') &&
5856                  $cgi->Accept('text/xml') > $cgi->Accept($content_type)) {
5857                 # browser (feed reader) prefers text/xml
5858                 $content_type = 'text/xml';
5859         }
5860         if (defined($commitlist[0])) {
5861                 %latest_commit = %{$commitlist[0]};
5862                 %latest_date   = parse_date($latest_commit{'author_epoch'});
5863                 print $cgi->header(
5864                         -type => $content_type,
5865                         -charset => 'utf-8',
5866                         -last_modified => $latest_date{'rfc2822'});
5867         } else {
5868                 print $cgi->header(
5869                         -type => $content_type,
5870                         -charset => 'utf-8');
5871         }
5872
5873         # Optimization: skip generating the body if client asks only
5874         # for Last-Modified date.
5875         return if ($cgi->request_method() eq 'HEAD');
5876
5877         # header variables
5878         my $title = "$site_name - $project/$action";
5879         my $feed_type = 'log';
5880         if (defined $hash) {
5881                 $title .= " - '$hash'";
5882                 $feed_type = 'branch log';
5883                 if (defined $file_name) {
5884                         $title .= " :: $file_name";
5885                         $feed_type = 'history';
5886                 }
5887         } elsif (defined $file_name) {
5888                 $title .= " - $file_name";
5889                 $feed_type = 'history';
5890         }
5891         $title .= " $feed_type";
5892         my $descr = git_get_project_description($project);
5893         if (defined $descr) {
5894                 $descr = esc_html($descr);
5895         } else {
5896                 $descr = "$project " .
5897                          ($format eq 'rss' ? 'RSS' : 'Atom') .
5898                          " feed";
5899         }
5900         my $owner = git_get_project_owner($project);
5901         $owner = esc_html($owner);
5902
5903         #header
5904         my $alt_url;
5905         if (defined $file_name) {
5906                 $alt_url = href(-full=>1, action=>"history", hash=>$hash, file_name=>$file_name);
5907         } elsif (defined $hash) {
5908                 $alt_url = href(-full=>1, action=>"log", hash=>$hash);
5909         } else {
5910                 $alt_url = href(-full=>1, action=>"summary");
5911         }
5912         print qq!<?xml version="1.0" encoding="utf-8"?>\n!;
5913         if ($format eq 'rss') {
5914                 print <<XML;
5915 <rss version="2.0" xmlns:content="http://purl.org/rss/1.0/modules/content/">
5916 <channel>
5917 XML
5918                 print "<title>$title</title>\n" .
5919                       "<link>$alt_url</link>\n" .
5920                       "<description>$descr</description>\n" .
5921                       "<language>en</language>\n";
5922         } elsif ($format eq 'atom') {
5923                 print <<XML;
5924 <feed xmlns="http://www.w3.org/2005/Atom">
5925 XML
5926                 print "<title>$title</title>\n" .
5927                       "<subtitle>$descr</subtitle>\n" .
5928                       '<link rel="alternate" type="text/html" href="' .
5929                       $alt_url . '" />' . "\n" .
5930                       '<link rel="self" type="' . $content_type . '" href="' .
5931                       $cgi->self_url() . '" />' . "\n" .
5932                       "<id>" . href(-full=>1) . "</id>\n" .
5933                       # use project owner for feed author
5934                       "<author><name>$owner</name></author>\n";
5935                 if (defined $favicon) {
5936                         print "<icon>" . esc_url($favicon) . "</icon>\n";
5937                 }
5938                 if (defined $logo_url) {
5939                         # not twice as wide as tall: 72 x 27 pixels
5940                         print "<logo>" . esc_url($logo) . "</logo>\n";
5941                 }
5942                 if (! %latest_date) {
5943                         # dummy date to keep the feed valid until commits trickle in:
5944                         print "<updated>1970-01-01T00:00:00Z</updated>\n";
5945                 } else {
5946                         print "<updated>$latest_date{'iso-8601'}</updated>\n";
5947                 }
5948         }
5949
5950         # contents
5951         for (my $i = 0; $i <= $#commitlist; $i++) {
5952                 my %co = %{$commitlist[$i]};
5953                 my $commit = $co{'id'};
5954                 # we read 150, we always show 30 and the ones more recent than 48 hours
5955                 if (($i >= 20) && ((time - $co{'author_epoch'}) > 48*60*60)) {
5956                         last;
5957                 }
5958                 my %cd = parse_date($co{'author_epoch'});
5959
5960                 # get list of changed files
5961                 open my $fd, "-|", git_cmd(), "diff-tree", '-r', @diff_opts,
5962                         $co{'parent'} || "--root",
5963                         $co{'id'}, "--", (defined $file_name ? $file_name : ())
5964                         or next;
5965                 my @difftree = map { chomp; $_ } <$fd>;
5966                 close $fd
5967                         or next;
5968
5969                 # print element (entry, item)
5970                 my $co_url = href(-full=>1, action=>"commitdiff", hash=>$commit);
5971                 if ($format eq 'rss') {
5972                         print "<item>\n" .
5973                               "<title>" . esc_html($co{'title'}) . "</title>\n" .
5974                               "<author>" . esc_html($co{'author'}) . "</author>\n" .
5975                               "<pubDate>$cd{'rfc2822'}</pubDate>\n" .
5976                               "<guid isPermaLink=\"true\">$co_url</guid>\n" .
5977                               "<link>$co_url</link>\n" .
5978                               "<description>" . esc_html($co{'title'}) . "</description>\n" .
5979                               "<content:encoded>" .
5980                               "<![CDATA[\n";
5981                 } elsif ($format eq 'atom') {
5982                         print "<entry>\n" .
5983                               "<title type=\"html\">" . esc_html($co{'title'}) . "</title>\n" .
5984                               "<updated>$cd{'iso-8601'}</updated>\n" .
5985                               "<author>\n" .
5986                               "  <name>" . esc_html($co{'author_name'}) . "</name>\n";
5987                         if ($co{'author_email'}) {
5988                                 print "  <email>" . esc_html($co{'author_email'}) . "</email>\n";
5989                         }
5990                         print "</author>\n" .
5991                               # use committer for contributor
5992                               "<contributor>\n" .
5993                               "  <name>" . esc_html($co{'committer_name'}) . "</name>\n";
5994                         if ($co{'committer_email'}) {
5995                                 print "  <email>" . esc_html($co{'committer_email'}) . "</email>\n";
5996                         }
5997                         print "</contributor>\n" .
5998                               "<published>$cd{'iso-8601'}</published>\n" .
5999                               "<link rel=\"alternate\" type=\"text/html\" href=\"$co_url\" />\n" .
6000                               "<id>$co_url</id>\n" .
6001                               "<content type=\"xhtml\" xml:base=\"" . esc_url($my_url) . "\">\n" .
6002                               "<div xmlns=\"http://www.w3.org/1999/xhtml\">\n";
6003                 }
6004                 my $comment = $co{'comment'};
6005                 print "<pre>\n";
6006                 foreach my $line (@$comment) {
6007                         $line = esc_html($line);
6008                         print "$line\n";
6009                 }
6010                 print "</pre><ul>\n";
6011                 foreach my $difftree_line (@difftree) {
6012                         my %difftree = parse_difftree_raw_line($difftree_line);
6013                         next if !$difftree{'from_id'};
6014
6015                         my $file = $difftree{'file'} || $difftree{'to_file'};
6016
6017                         print "<li>" .
6018                               "[" .
6019                               $cgi->a({-href => href(-full=>1, action=>"blobdiff",
6020                                                      hash=>$difftree{'to_id'}, hash_parent=>$difftree{'from_id'},
6021                                                      hash_base=>$co{'id'}, hash_parent_base=>$co{'parent'},
6022                                                      file_name=>$file, file_parent=>$difftree{'from_file'}),
6023                                       -title => "diff"}, 'D');
6024                         if ($have_blame) {
6025                                 print $cgi->a({-href => href(-full=>1, action=>"blame",
6026                                                              file_name=>$file, hash_base=>$commit),
6027                                               -title => "blame"}, 'B');
6028                         }
6029                         # if this is not a feed of a file history
6030                         if (!defined $file_name || $file_name ne $file) {
6031                                 print $cgi->a({-href => href(-full=>1, action=>"history",
6032                                                              file_name=>$file, hash=>$commit),
6033                                               -title => "history"}, 'H');
6034                         }
6035                         $file = esc_path($file);
6036                         print "] ".
6037                               "$file</li>\n";
6038                 }
6039                 if ($format eq 'rss') {
6040                         print "</ul>]]>\n" .
6041                               "</content:encoded>\n" .
6042                               "</item>\n";
6043                 } elsif ($format eq 'atom') {
6044                         print "</ul>\n</div>\n" .
6045                               "</content>\n" .
6046                               "</entry>\n";
6047                 }
6048         }
6049
6050         # end of feed
6051         if ($format eq 'rss') {
6052                 print "</channel>\n</rss>\n";
6053         }       elsif ($format eq 'atom') {
6054                 print "</feed>\n";
6055         }
6056 }
6057
6058 sub git_rss {
6059         git_feed('rss');
6060 }
6061
6062 sub git_atom {
6063         git_feed('atom');
6064 }
6065
6066 sub git_opml {
6067         my @list = git_get_projects_list();
6068
6069         print $cgi->header(-type => 'text/xml', -charset => 'utf-8');
6070         print <<XML;
6071 <?xml version="1.0" encoding="utf-8"?>
6072 <opml version="1.0">
6073 <head>
6074   <title>$site_name OPML Export</title>
6075 </head>
6076 <body>
6077 <outline text="git RSS feeds">
6078 XML
6079
6080         foreach my $pr (@list) {
6081                 my %proj = %$pr;
6082                 my $head = git_get_head_hash($proj{'path'});
6083                 if (!defined $head) {
6084                         next;
6085                 }
6086                 $git_dir = "$projectroot/$proj{'path'}";
6087                 my %co = parse_commit($head);
6088                 if (!%co) {
6089                         next;
6090                 }
6091
6092                 my $path = esc_html(chop_str($proj{'path'}, 25, 5));
6093                 my $rss  = "$my_url?p=$proj{'path'};a=rss";
6094                 my $html = "$my_url?p=$proj{'path'};a=summary";
6095                 print "<outline type=\"rss\" text=\"$path\" title=\"$path\" xmlUrl=\"$rss\" htmlUrl=\"$html\"/>\n";
6096         }
6097         print <<XML;
6098 </outline>
6099 </body>
6100 </opml>
6101 XML
6102 }