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 our $cgi = new CGI;
  22 our $version = "++GIT_VERSION++";
  23 our $my_url = $cgi->url();
  24 our $my_uri = $cgi->url(-absolute => 1);
  25
  26 # core git executable to use
  27 # this can just be "git" if your webserver has a sensible PATH
  28 our $GIT = "++GIT_BINDIR++/git";
  29
  30 # absolute fs-path which will be prepended to the project path
  31 #our $projectroot = "/pub/scm";
  32 our $projectroot = "++GITWEB_PROJECTROOT++";
  33
  34 # target of the home link on top of all pages
  35 our $home_link = $my_uri || "/";
  36
  37 # string of the home link on top of all pages
  38 our $home_link_str = "++GITWEB_HOME_LINK_STR++";
  39
  40 # name of your site or organization to appear in page titles
  41 # replace this with something more descriptive for clearer bookmarks
  42 our $site_name = "++GITWEB_SITENAME++"
  43                  || ($ENV{'SERVER_NAME'} || "Untitled") . " Git";
  44
  45 # filename of html text to include at top of each page
  46 our $site_header = "++GITWEB_SITE_HEADER++";
  47 # html text to include at home page
  48 our $home_text = "++GITWEB_HOMETEXT++";
  49 # filename of html text to include at bottom of each page
  50 our $site_footer = "++GITWEB_SITE_FOOTER++";
  51
  52 # URI of stylesheets
  53 our @stylesheets = ("++GITWEB_CSS++");
  54 # URI of a single stylesheet, which can be overridden in GITWEB_CONFIG.
  55 our $stylesheet = undef;
  56 # URI of GIT logo (72x27 size)
  57 our $logo = "++GITWEB_LOGO++";
  58 # URI of GIT favicon, assumed to be image/png type
  59 our $favicon = "++GITWEB_FAVICON++";
  60
  61 # URI and label (title) of GIT logo link
  62 #our $logo_url = "http://www.kernel.org/pub/software/scm/git/docs/";
  63 #our $logo_label = "git documentation";
  64 our $logo_url = "http://git.or.cz/";
  65 our $logo_label = "git homepage";
  66
  67 # source of projects list
  68 our $projects_list = "++GITWEB_LIST++";
  69
  70 # show repository only if this file exists
  71 # (only effective if this variable evaluates to true)
  72 our $export_ok = "++GITWEB_EXPORT_OK++";
  73
  74 # only allow viewing of repositories also shown on the overview page
  75 our $strict_export = "++GITWEB_STRICT_EXPORT++";
  76
  77 # list of git base URLs used for URL to where fetch project from,
  78 # i.e. full URL is "$git_base_url/$project"
  79 our @git_base_url_list = grep { $_ ne '' } ("++GITWEB_BASE_URL++");
  80
  81 # default blob_plain mimetype and default charset for text/plain blob
  82 our $default_blob_plain_mimetype = 'text/plain';
  83 our $default_text_plain_charset  = undef;
  84
  85 # file to use for guessing MIME types before trying /etc/mime.types
  86 # (relative to the current git repository)
  87 our $mimetypes_file = undef;
  88
  89 # You define site-wide feature defaults here; override them with
  90 # $GITWEB_CONFIG as necessary.
  91 our %feature = (
  92         # feature => {
  93         #       'sub' => feature-sub (subroutine),
  94         #       'override' => allow-override (boolean),
  95         #       'default' => [ default options...] (array reference)}
  96         #
  97         # if feature is overridable (it means that allow-override has true value,
  98         # then feature-sub will be called with default options as parameters;
  99         # return value of feature-sub indicates if to enable specified feature
 100         #
 101         # use gitweb_check_feature(<feature>) to check if <feature> is enabled
 102
 103         # Enable the 'blame' blob view, showing the last commit that modified
 104         # each line in the file. This can be very CPU-intensive.
 105
 106         # To enable system wide have in $GITWEB_CONFIG
 107         # $feature{'blame'}{'default'} = [1];
 108         # To have project specific config enable override in $GITWEB_CONFIG
 109         # $feature{'blame'}{'override'} = 1;
 110         # and in project config gitweb.blame = 0|1;
 111         'blame' => {
 112                 'sub' => \&feature_blame,
 113                 'override' => 0,
 114                 'default' => [0]},
 115
 116         # Enable the 'snapshot' link, providing a compressed tarball of any
 117         # tree. This can potentially generate high traffic if you have large
 118         # project.
 119
 120         # To disable system wide have in $GITWEB_CONFIG
 121         # $feature{'snapshot'}{'default'} = [undef];
 122         # To have project specific config enable override in $GITWEB_CONFIG
 123         # $feature{'snapshot'}{'override'} = 1;
 124         # and in project config gitweb.snapshot = none|gzip|bzip2;
 125         'snapshot' => {
 126                 'sub' => \&feature_snapshot,
 127                 'override' => 0,
 128                 #         => [content-encoding, suffix, program]
 129                 'default' => ['x-gzip', 'gz', 'gzip']},
 130
 131         # Enable text search, which will list the commits which match author,
 132         # committer or commit text to a given string.  Enabled by default.
 133         'search' => {
 134                 'override' => 0,
 135                 'default' => [1]},
 136
 137         # Enable the pickaxe search, which will list the commits that modified
 138         # a given string in a file. This can be practical and quite faster
 139         # alternative to 'blame', but still potentially CPU-intensive.
 140
 141         # To enable system wide have in $GITWEB_CONFIG
 142         # $feature{'pickaxe'}{'default'} = [1];
 143         # To have project specific config enable override in $GITWEB_CONFIG
 144         # $feature{'pickaxe'}{'override'} = 1;
 145         # and in project config gitweb.pickaxe = 0|1;
 146         'pickaxe' => {
 147                 'sub' => \&feature_pickaxe,
 148                 'override' => 0,
 149                 'default' => [1]},
 150
 151         # Make gitweb use an alternative format of the URLs which can be
 152         # more readable and natural-looking: project name is embedded
 153         # directly in the path and the query string contains other
 154         # auxiliary information. All gitweb installations recognize
 155         # URL in either format; this configures in which formats gitweb
 156         # generates links.
 157
 158         # To enable system wide have in $GITWEB_CONFIG
 159         # $feature{'pathinfo'}{'default'} = [1];
 160         # Project specific override is not supported.
 161
 162         # Note that you will need to change the default location of CSS,
 163         # favicon, logo and possibly other files to an absolute URL. Also,
 164         # if gitweb.cgi serves as your indexfile, you will need to force
 165         # $my_uri to contain the script name in your $GITWEB_CONFIG.
 166         'pathinfo' => {
 167                 'override' => 0,
 168                 'default' => [0]},
 169
 170         # Make gitweb consider projects in project root subdirectories
 171         # to be forks of existing projects. Given project $projname.git,
 172         # projects matching $projname/*.git will not be shown in the main
 173         # projects list, instead a '+' mark will be added to $projname
 174         # there and a 'forks' view will be enabled for the project, listing
 175         # all the forks. This feature is supported only if project list
 176         # is taken from a directory, not file.
 177
 178         # To enable system wide have in $GITWEB_CONFIG
 179         # $feature{'forks'}{'default'} = [1];
 180         # Project specific override is not supported.
 181         'forks' => {
 182                 'override' => 0,
 183                 'default' => [0]},
 184 );
 185
 186 sub gitweb_check_feature {
 187         my ($name) = @_;
 188         return unless exists $feature{$name};
 189         my ($sub, $override, @defaults) = (
 190                 $feature{$name}{'sub'},
 191                 $feature{$name}{'override'},
 192                 @{$feature{$name}{'default'}});
 193         if (!$override) { return @defaults; }
 194         if (!defined $sub) {
 195                 warn "feature $name is not overrideable";
 196                 return @defaults;
 197         }
 198         return $sub->(@defaults);
 199 }
 200
 201 sub feature_blame {
 202         my ($val) = git_get_project_config('blame', '--bool');
 203
 204         if ($val eq 'true') {
 205                 return 1;
 206         } elsif ($val eq 'false') {
 207                 return 0;
 208         }
 209
 210         return $_[0];
 211 }
 212
 213 sub feature_snapshot {
 214         my ($ctype, $suffix, $command) = @_;
 215
 216         my ($val) = git_get_project_config('snapshot');
 217
 218         if ($val eq 'gzip') {
 219                 return ('x-gzip', 'gz', 'gzip');
 220         } elsif ($val eq 'bzip2') {
 221                 return ('x-bzip2', 'bz2', 'bzip2');
 222         } elsif ($val eq 'none') {
 223                 return ();
 224         }
 225
 226         return ($ctype, $suffix, $command);
 227 }
 228
 229 sub gitweb_have_snapshot {
 230         my ($ctype, $suffix, $command) = gitweb_check_feature('snapshot');
 231         my $have_snapshot = (defined $ctype && defined $suffix);
 232
 233         return $have_snapshot;
 234 }
 235
 236 sub feature_pickaxe {
 237         my ($val) = git_get_project_config('pickaxe', '--bool');
 238
 239         if ($val eq 'true') {
 240                 return (1);
 241         } elsif ($val eq 'false') {
 242                 return (0);
 243         }
 244
 245         return ($_[0]);
 246 }
 247
 248 # checking HEAD file with -e is fragile if the repository was
 249 # initialized long time ago (i.e. symlink HEAD) and was pack-ref'ed
 250 # and then pruned.
 251 sub check_head_link {
 252         my ($dir) = @_;
 253         my $headfile = "$dir/HEAD";
 254         return ((-e $headfile) ||
 255                 (-l $headfile && readlink($headfile) =~ /^refs\/heads\//));
 256 }
 257
 258 sub check_export_ok {
 259         my ($dir) = @_;
 260         return (check_head_link($dir) &&
 261                 (!$export_ok || -e "$dir/$export_ok"));
 262 }
 263
 264 # rename detection options for git-diff and git-diff-tree
 265 # - default is '-M', with the cost proportional to
 266 #   (number of removed files) * (number of new files).
 267 # - more costly is '-C' (or '-C', '-M'), with the cost proportional to
 268 #   (number of changed files + number of removed files) * (number of new files)
 269 # - even more costly is '-C', '--find-copies-harder' with cost
 270 #   (number of files in the original tree) * (number of new files)
 271 # - one might want to include '-B' option, e.g. '-B', '-M'
 272 our @diff_opts = ('-M'); # taken from git_commit
 273
 274 our $GITWEB_CONFIG = $ENV{'GITWEB_CONFIG'} || "++GITWEB_CONFIG++";
 275 do $GITWEB_CONFIG if -e $GITWEB_CONFIG;
 276
 277 # version of the core git binary
 278 our $git_version = qx($GIT --version) =~ m/git version (.*)$/ ? $1 : "unknown";
 279
 280 $projects_list ||= $projectroot;
 281
 282 # ======================================================================
 283 # input validation and dispatch
 284 our $action = $cgi->param('a');
 285 if (defined $action) {
 286         if ($action =~ m/[^0-9a-zA-Z\.\-_]/) {
 287                 die_error(undef, "Invalid action parameter");
 288         }
 289 }
 290
 291 # parameters which are pathnames
 292 our $project = $cgi->param('p');
 293 if (defined $project) {
 294         if (!validate_pathname($project) ||
 295             !(-d "$projectroot/$project") ||
 296             !check_head_link("$projectroot/$project") ||
 297             ($export_ok && !(-e "$projectroot/$project/$export_ok")) ||
 298             ($strict_export && !project_in_list($project))) {
 299                 undef $project;
 300                 die_error(undef, "No such project");
 301         }
 302 }
 303
 304 our $file_name = $cgi->param('f');
 305 if (defined $file_name) {
 306         if (!validate_pathname($file_name)) {
 307                 die_error(undef, "Invalid file parameter");
 308         }
 309 }
 310
 311 our $file_parent = $cgi->param('fp');
 312 if (defined $file_parent) {
 313         if (!validate_pathname($file_parent)) {
 314                 die_error(undef, "Invalid file parent parameter");
 315         }
 316 }
 317
 318 # parameters which are refnames
 319 our $hash = $cgi->param('h');
 320 if (defined $hash) {
 321         if (!validate_refname($hash)) {
 322                 die_error(undef, "Invalid hash parameter");
 323         }
 324 }
 325
 326 our $hash_parent = $cgi->param('hp');
 327 if (defined $hash_parent) {
 328         if (!validate_refname($hash_parent)) {
 329                 die_error(undef, "Invalid hash parent parameter");
 330         }
 331 }
 332
 333 our $hash_base = $cgi->param('hb');
 334 if (defined $hash_base) {
 335         if (!validate_refname($hash_base)) {
 336                 die_error(undef, "Invalid hash base parameter");
 337         }
 338 }
 339
 340 our $hash_parent_base = $cgi->param('hpb');
 341 if (defined $hash_parent_base) {
 342         if (!validate_refname($hash_parent_base)) {
 343                 die_error(undef, "Invalid hash parent base parameter");
 344         }
 345 }
 346
 347 # other parameters
 348 our $page = $cgi->param('pg');
 349 if (defined $page) {
 350         if ($page =~ m/[^0-9]/) {
 351                 die_error(undef, "Invalid page parameter");
 352         }
 353 }
 354
 355 our $searchtext = $cgi->param('s');
 356 if (defined $searchtext) {
 357         if ($searchtext =~ m/[^a-zA-Z0-9_\.\/\-\+\:\@ ]/) {
 358                 die_error(undef, "Invalid search parameter");
 359         }
 360         if (length($searchtext) < 2) {
 361                 die_error(undef, "At least two characters are required for search parameter");
 362         }
 363         $searchtext = quotemeta $searchtext;
 364 }
 365
 366 our $searchtype = $cgi->param('st');
 367 if (defined $searchtype) {
 368         if ($searchtype =~ m/[^a-z]/) {
 369                 die_error(undef, "Invalid searchtype parameter");
 370         }
 371 }
 372
 373 # now read PATH_INFO and use it as alternative to parameters
 374 sub evaluate_path_info {
 375         return if defined $project;
 376         my $path_info = $ENV{"PATH_INFO"};
 377         return if !$path_info;
 378         $path_info =~ s,^/+,,;
 379         return if !$path_info;
 380         # find which part of PATH_INFO is project
 381         $project = $path_info;
 382         $project =~ s,/+$,,;
 383         while ($project && !check_head_link("$projectroot/$project")) {
 384                 $project =~ s,/*[^/]*$,,;
 385         }
 386         # validate project
 387         $project = validate_pathname($project);
 388         if (!$project ||
 389             ($export_ok && !-e "$projectroot/$project/$export_ok") ||
 390             ($strict_export && !project_in_list($project))) {
 391                 undef $project;
 392                 return;
 393         }
 394         # do not change any parameters if an action is given using the query string
 395         return if $action;
 396         $path_info =~ s,^$project/*,,;
 397         my ($refname, $pathname) = split(/:/, $path_info, 2);
 398         if (defined $pathname) {
 399                 # we got "project.git/branch:filename" or "project.git/branch:dir/"
 400                 # we could use git_get_type(branch:pathname), but it needs $git_dir
 401                 $pathname =~ s,^/+,,;
 402                 if (!$pathname || substr($pathname, -1) eq "/") {
 403                         $action  ||= "tree";
 404                         $pathname =~ s,/$,,;
 405                 } else {
 406                         $action  ||= "blob_plain";
 407                 }
 408                 $hash_base ||= validate_refname($refname);
 409                 $file_name ||= validate_pathname($pathname);
 410         } elsif (defined $refname) {
 411                 # we got "project.git/branch"
 412                 $action ||= "shortlog";
 413                 $hash   ||= validate_refname($refname);
 414         }
 415 }
 416 evaluate_path_info();
 417
 418 # path to the current git repository
 419 our $git_dir;
 420 $git_dir = "$projectroot/$project" if $project;
 421
 422 # dispatch
 423 my %actions = (
 424         "blame" => \&git_blame2,
 425         "blobdiff" => \&git_blobdiff,
 426         "blobdiff_plain" => \&git_blobdiff_plain,
 427         "blob" => \&git_blob,
 428         "blob_plain" => \&git_blob_plain,
 429         "commitdiff" => \&git_commitdiff,
 430         "commitdiff_plain" => \&git_commitdiff_plain,
 431         "commit" => \&git_commit,
 432         "forks" => \&git_forks,
 433         "heads" => \&git_heads,
 434         "history" => \&git_history,
 435         "log" => \&git_log,
 436         "rss" => \&git_rss,
 437         "atom" => \&git_atom,
 438         "search" => \&git_search,
 439         "search_help" => \&git_search_help,
 440         "shortlog" => \&git_shortlog,
 441         "summary" => \&git_summary,
 442         "tag" => \&git_tag,
 443         "tags" => \&git_tags,
 444         "tree" => \&git_tree,
 445         "snapshot" => \&git_snapshot,
 446         "object" => \&git_object,
 447         # those below don't need $project
 448         "opml" => \&git_opml,
 449         "project_list" => \&git_project_list,
 450         "project_index" => \&git_project_index,
 451 );
 452
 453 if (defined $project) {
 454         $action ||= 'summary';
 455 } else {
 456         $action ||= 'project_list';
 457 }
 458 if (!defined($actions{$action})) {
 459         die_error(undef, "Unknown action");
 460 }
 461 if ($action !~ m/^(opml|project_list|project_index)$/ &&
 462     !$project) {
 463         die_error(undef, "Project needed");
 464 }
 465 $actions{$action}->();
 466 exit;
 467
 468 ## ======================================================================
 469 ## action links
 470
 471 sub href(%) {
 472         my %params = @_;
 473         # default is to use -absolute url() i.e. $my_uri
 474         my $href = $params{-full} ? $my_url : $my_uri;
 475
 476         # XXX: Warning: If you touch this, check the search form for updating,
 477         # too.
 478
 479         my @mapping = (
 480                 project => "p",
 481                 action => "a",
 482                 file_name => "f",
 483                 file_parent => "fp",
 484                 hash => "h",
 485                 hash_parent => "hp",
 486                 hash_base => "hb",
 487                 hash_parent_base => "hpb",
 488                 page => "pg",
 489                 order => "o",
 490                 searchtext => "s",
 491                 searchtype => "st",
 492         );
 493         my %mapping = @mapping;
 494
 495         $params{'project'} = $project unless exists $params{'project'};
 496
 497         my ($use_pathinfo) = gitweb_check_feature('pathinfo');
 498         if ($use_pathinfo) {
 499                 # use PATH_INFO for project name
 500                 $href .= "/$params{'project'}" if defined $params{'project'};
 501                 delete $params{'project'};
 502
 503                 # Summary just uses the project path URL
 504                 if (defined $params{'action'} && $params{'action'} eq 'summary') {
 505                         delete $params{'action'};
 506                 }
 507         }
 508
 509         # now encode the parameters explicitly
 510         my @result = ();
 511         for (my $i = 0; $i < @mapping; $i += 2) {
 512                 my ($name, $symbol) = ($mapping[$i], $mapping[$i+1]);
 513                 if (defined $params{$name}) {
 514                         push @result, $symbol . "=" . esc_param($params{$name});
 515                 }
 516         }
 517         $href .= "?" . join(';', @result) if scalar @result;
 518
 519         return $href;
 520 }
 521
 522
 523 ## ======================================================================
 524 ## validation, quoting/unquoting and escaping
 525
 526 sub validate_pathname {
 527         my $input = shift || return undef;
 528
 529         # no '.' or '..' as elements of path, i.e. no '.' nor '..'
 530         # at the beginning, at the end, and between slashes.
 531         # also this catches doubled slashes
 532         if ($input =~ m!(^|/)(|\.|\.\.)(/|$)!) {
 533                 return undef;
 534         }
 535         # no null characters
 536         if ($input =~ m!\0!) {
 537                 return undef;
 538         }
 539         return $input;
 540 }
 541
 542 sub validate_refname {
 543         my $input = shift || return undef;
 544
 545         # textual hashes are O.K.
 546         if ($input =~ m/^[0-9a-fA-F]{40}$/) {
 547                 return $input;
 548         }
 549         # it must be correct pathname
 550         $input = validate_pathname($input)
 551                 or return undef;
 552         # restrictions on ref name according to git-check-ref-format
 553         if ($input =~ m!(/\.|\.\.|[\000-\040\177 ~^:?*\[]|/$)!) {
 554                 return undef;
 555         }
 556         return $input;
 557 }
 558
 559 # very thin wrapper for decode("utf8", $str, Encode::FB_DEFAULT);
 560 sub to_utf8 {
 561         my $str = shift;
 562         return decode("utf8", $str, Encode::FB_DEFAULT);
 563 }
 564
 565 # quote unsafe chars, but keep the slash, even when it's not
 566 # correct, but quoted slashes look too horrible in bookmarks
 567 sub esc_param {
 568         my $str = shift;
 569         $str =~ s/([^A-Za-z0-9\-_.~()\/:@])/sprintf("%%%02X", ord($1))/eg;
 570         $str =~ s/\+/%2B/g;
 571         $str =~ s/ /\+/g;
 572         return $str;
 573 }
 574
 575 # quote unsafe chars in whole URL, so some charactrs cannot be quoted
 576 sub esc_url {
 577         my $str = shift;
 578         $str =~ s/([^A-Za-z0-9\-_.~();\/;?:@&=])/sprintf("%%%02X", ord($1))/eg;
 579         $str =~ s/\+/%2B/g;
 580         $str =~ s/ /\+/g;
 581         return $str;
 582 }
 583
 584 # replace invalid utf8 character with SUBSTITUTION sequence
 585 sub esc_html ($;%) {
 586         my $str = shift;
 587         my %opts = @_;
 588
 589         $str = to_utf8($str);
 590         $str = escapeHTML($str);
 591         if ($opts{'-nbsp'}) {
 592                 $str =~ s/ /&nbsp;/g;
 593         }
 594         $str =~ s|([[:cntrl:]])|(($1 ne "\t") ? quot_cec($1) : $1)|eg;
 595         return $str;
 596 }
 597
 598 # quote control characters and escape filename to HTML
 599 sub esc_path {
 600         my $str = shift;
 601         my %opts = @_;
 602
 603         $str = to_utf8($str);
 604         $str = escapeHTML($str);
 605         if ($opts{'-nbsp'}) {
 606                 $str =~ s/ /&nbsp;/g;
 607         }
 608         $str =~ s|([[:cntrl:]])|quot_cec($1)|eg;
 609         return $str;
 610 }
 611
 612 # Make control characters "printable", using character escape codes (CEC)
 613 sub quot_cec {
 614         my $cntrl = shift;
 615         my %es = ( # character escape codes, aka escape sequences
 616                    "\t" => '\t',   # tab            (HT)
 617                    "\n" => '\n',   # line feed      (LF)
 618                    "\r" => '\r',   # carrige return (CR)
 619                    "\f" => '\f',   # form feed      (FF)
 620                    "\b" => '\b',   # backspace      (BS)
 621                    "\a" => '\a',   # alarm (bell)   (BEL)
 622                    "\e" => '\e',   # escape         (ESC)
 623                    "\013" => '\v', # vertical tab   (VT)
 624                    "\000" => '\0', # nul character  (NUL)
 625                    );
 626         my $chr = ( (exists $es{$cntrl})
 627                     ? $es{$cntrl}
 628                     : sprintf('\%03o', ord($cntrl)) );
 629         return "<span class=\"cntrl\">$chr</span>";
 630 }
 631
 632 # Alternatively use unicode control pictures codepoints,
 633 # Unicode "printable representation" (PR)
 634 sub quot_upr {
 635         my $cntrl = shift;
 636         my $chr = sprintf('&#%04d;', 0x2400+ord($cntrl));
 637         return "<span class=\"cntrl\">$chr</span>";
 638 }
 639
 640 # git may return quoted and escaped filenames
 641 sub unquote {
 642         my $str = shift;
 643
 644         sub unq {
 645                 my $seq = shift;
 646                 my %es = ( # character escape codes, aka escape sequences
 647                         't' => "\t",   # tab            (HT, TAB)
 648                         'n' => "\n",   # newline        (NL)
 649                         'r' => "\r",   # return         (CR)
 650                         'f' => "\f",   # form feed      (FF)
 651                         'b' => "\b",   # backspace      (BS)
 652                         'a' => "\a",   # alarm (bell)   (BEL)
 653                         'e' => "\e",   # escape         (ESC)
 654                         'v' => "\013", # vertical tab   (VT)
 655                 );
 656
 657                 if ($seq =~ m/^[0-7]{1,3}$/) {
 658                         # octal char sequence
 659                         return chr(oct($seq));
 660                 } elsif (exists $es{$seq}) {
 661                         # C escape sequence, aka character escape code
 662                         return $es{$seq}
 663                 }
 664                 # quoted ordinary character
 665                 return $seq;
 666         }
 667
 668         if ($str =~ m/^"(.*)"$/) {
 669                 # needs unquoting
 670                 $str = $1;
 671                 $str =~ s/\\([^0-7]|[0-7]{1,3})/unq($1)/eg;
 672         }
 673         return $str;
 674 }
 675
 676 # escape tabs (convert tabs to spaces)
 677 sub untabify {
 678         my $line = shift;
 679
 680         while ((my $pos = index($line, "\t")) != -1) {
 681                 if (my $count = (8 - ($pos % 8))) {
 682                         my $spaces = ' ' x $count;
 683                         $line =~ s/\t/$spaces/;
 684                 }
 685         }
 686
 687         return $line;
 688 }
 689
 690 sub project_in_list {
 691         my $project = shift;
 692         my @list = git_get_projects_list();
 693         return @list && scalar(grep { $_->{'path'} eq $project } @list);
 694 }
 695
 696 ## ----------------------------------------------------------------------
 697 ## HTML aware string manipulation
 698
 699 sub chop_str {
 700         my $str = shift;
 701         my $len = shift;
 702         my $add_len = shift || 10;
 703
 704         # allow only $len chars, but don't cut a word if it would fit in $add_len
 705         # if it doesn't fit, cut it if it's still longer than the dots we would add
 706         $str =~ m/^(.{0,$len}[^ \/\-_:\.@]{0,$add_len})(.*)/;
 707         my $body = $1;
 708         my $tail = $2;
 709         if (length($tail) > 4) {
 710                 $tail = " ...";
 711                 $body =~ s/&[^;]*$//; # remove chopped character entities
 712         }
 713         return "$body$tail";
 714 }
 715
 716 ## ----------------------------------------------------------------------
 717 ## functions returning short strings
 718
 719 # CSS class for given age value (in seconds)
 720 sub age_class {
 721         my $age = shift;
 722
 723         if ($age < 60*60*2) {
 724                 return "age0";
 725         } elsif ($age < 60*60*24*2) {
 726                 return "age1";
 727         } else {
 728                 return "age2";
 729         }
 730 }
 731
 732 # convert age in seconds to "nn units ago" string
 733 sub age_string {
 734         my $age = shift;
 735         my $age_str;
 736
 737         if ($age > 60*60*24*365*2) {
 738                 $age_str = (int $age/60/60/24/365);
 739                 $age_str .= " years ago";
 740         } elsif ($age > 60*60*24*(365/12)*2) {
 741                 $age_str = int $age/60/60/24/(365/12);
 742                 $age_str .= " months ago";
 743         } elsif ($age > 60*60*24*7*2) {
 744                 $age_str = int $age/60/60/24/7;
 745                 $age_str .= " weeks ago";
 746         } elsif ($age > 60*60*24*2) {
 747                 $age_str = int $age/60/60/24;
 748                 $age_str .= " days ago";
 749         } elsif ($age > 60*60*2) {
 750                 $age_str = int $age/60/60;
 751                 $age_str .= " hours ago";
 752         } elsif ($age > 60*2) {
 753                 $age_str = int $age/60;
 754                 $age_str .= " min ago";
 755         } elsif ($age > 2) {
 756                 $age_str = int $age;
 757                 $age_str .= " sec ago";
 758         } else {
 759                 $age_str .= " right now";
 760         }
 761         return $age_str;
 762 }
 763
 764 # convert file mode in octal to symbolic file mode string
 765 sub mode_str {
 766         my $mode = oct shift;
 767
 768         if (S_ISDIR($mode & S_IFMT)) {
 769                 return 'drwxr-xr-x';
 770         } elsif (S_ISLNK($mode)) {
 771                 return 'lrwxrwxrwx';
 772         } elsif (S_ISREG($mode)) {
 773                 # git cares only about the executable bit
 774                 if ($mode & S_IXUSR) {
 775                         return '-rwxr-xr-x';
 776                 } else {
 777                         return '-rw-r--r--';
 778                 };
 779         } else {
 780                 return '----------';
 781         }
 782 }
 783
 784 # convert file mode in octal to file type string
 785 sub file_type {
 786         my $mode = shift;
 787
 788         if ($mode !~ m/^[0-7]+$/) {
 789                 return $mode;
 790         } else {
 791                 $mode = oct $mode;
 792         }
 793
 794         if (S_ISDIR($mode & S_IFMT)) {
 795                 return "directory";
 796         } elsif (S_ISLNK($mode)) {
 797                 return "symlink";
 798         } elsif (S_ISREG($mode)) {
 799                 return "file";
 800         } else {
 801                 return "unknown";
 802         }
 803 }
 804
 805 # convert file mode in octal to file type description string
 806 sub file_type_long {
 807         my $mode = shift;
 808
 809         if ($mode !~ m/^[0-7]+$/) {
 810                 return $mode;
 811         } else {
 812                 $mode = oct $mode;
 813         }
 814
 815         if (S_ISDIR($mode & S_IFMT)) {
 816                 return "directory";
 817         } elsif (S_ISLNK($mode)) {
 818                 return "symlink";
 819         } elsif (S_ISREG($mode)) {
 820                 if ($mode & S_IXUSR) {
 821                         return "executable";
 822                 } else {
 823                         return "file";
 824                 };
 825         } else {
 826                 return "unknown";
 827         }
 828 }
 829
 830
 831 ## ----------------------------------------------------------------------
 832 ## functions returning short HTML fragments, or transforming HTML fragments
 833 ## which don't beling to other sections
 834
 835 # format line of commit message.
 836 sub format_log_line_html {
 837         my $line = shift;
 838
 839         $line = esc_html($line, -nbsp=>1);
 840         if ($line =~ m/([0-9a-fA-F]{8,40})/) {
 841                 my $hash_text = $1;
 842                 my $link =
 843                         $cgi->a({-href => href(action=>"object", hash=>$hash_text),
 844                                 -class => "text"}, $hash_text);
 845                 $line =~ s/$hash_text/$link/;
 846         }
 847         return $line;
 848 }
 849
 850 # format marker of refs pointing to given object
 851 sub format_ref_marker {
 852         my ($refs, $id) = @_;
 853         my $markers = '';
 854
 855         if (defined $refs->{$id}) {
 856                 foreach my $ref (@{$refs->{$id}}) {
 857                         my ($type, $name) = qw();
 858                         # e.g. tags/v2.6.11 or heads/next
 859                         if ($ref =~ m!^(.*?)s?/(.*)$!) {
 860                                 $type = $1;
 861                                 $name = $2;
 862                         } else {
 863                                 $type = "ref";
 864                                 $name = $ref;
 865                         }
 866
 867                         $markers .= " <span class=\"$type\" title=\"$ref\">" .
 868                                     esc_html($name) . "</span>";
 869                 }
 870         }
 871
 872         if ($markers) {
 873                 return ' <span class="refs">'. $markers . '</span>';
 874         } else {
 875                 return "";
 876         }
 877 }
 878
 879 # format, perhaps shortened and with markers, title line
 880 sub format_subject_html {
 881         my ($long, $short, $href, $extra) = @_;
 882         $extra = '' unless defined($extra);
 883
 884         if (length($short) < length($long)) {
 885                 return $cgi->a({-href => $href, -class => "list subject",
 886                                 -title => to_utf8($long)},
 887                        esc_html($short) . $extra);
 888         } else {
 889                 return $cgi->a({-href => $href, -class => "list subject"},
 890                        esc_html($long)  . $extra);
 891         }
 892 }
 893
 894 # format patch (diff) line (rather not to be used for diff headers)
 895 sub format_diff_line {
 896         my $line = shift;
 897         my ($from, $to) = @_;
 898         my $char = substr($line, 0, 1);
 899         my $diff_class = "";
 900
 901         chomp $line;
 902
 903         if ($char eq '+') {
 904                 $diff_class = " add";
 905         } elsif ($char eq "-") {
 906                 $diff_class = " rem";
 907         } elsif ($char eq "@") {
 908                 $diff_class = " chunk_header";
 909         } elsif ($char eq "\\") {
 910                 $diff_class = " incomplete";
 911         }
 912         $line = untabify($line);
 913         if ($from && $to && $line =~ m/^\@{2} /) {
 914                 my ($from_text, $from_start, $from_lines, $to_text, $to_start, $to_lines, $section) =
 915                         $line =~ m/^\@{2} (-(\d+)(?:,(\d+))?) (\+(\d+)(?:,(\d+))?) \@{2}(.*)$/;
 916
 917                 $from_lines = 0 unless defined $from_lines;
 918                 $to_lines   = 0 unless defined $to_lines;
 919
 920                 if ($from->{'href'}) {
 921                         $from_text = $cgi->a({-href=>"$from->{'href'}#l$from_start",
 922                                              -class=>"list"}, $from_text);
 923                 }
 924                 if ($to->{'href'}) {
 925                         $to_text   = $cgi->a({-href=>"$to->{'href'}#l$to_start",
 926                                              -class=>"list"}, $to_text);
 927                 }
 928                 $line = "<span class=\"chunk_info\">@@ $from_text $to_text @@</span>" .
 929                         "<span class=\"section\">" . esc_html($section, -nbsp=>1) . "</span>";
 930                 return "<div class=\"diff$diff_class\">$line</div>\n";
 931         }
 932         return "<div class=\"diff$diff_class\">" . esc_html($line, -nbsp=>1) . "</div>\n";
 933 }
 934
 935 ## ----------------------------------------------------------------------
 936 ## git utility subroutines, invoking git commands
 937
 938 # returns path to the core git executable and the --git-dir parameter as list
 939 sub git_cmd {
 940         return $GIT, '--git-dir='.$git_dir;
 941 }
 942
 943 # returns path to the core git executable and the --git-dir parameter as string
 944 sub git_cmd_str {
 945         return join(' ', git_cmd());
 946 }
 947
 948 # get HEAD ref of given project as hash
 949 sub git_get_head_hash {
 950         my $project = shift;
 951         my $o_git_dir = $git_dir;
 952         my $retval = undef;
 953         $git_dir = "$projectroot/$project";
 954         if (open my $fd, "-|", git_cmd(), "rev-parse", "--verify", "HEAD") {
 955                 my $head = <$fd>;
 956                 close $fd;
 957                 if (defined $head && $head =~ /^([0-9a-fA-F]{40})$/) {
 958                         $retval = $1;
 959                 }
 960         }
 961         if (defined $o_git_dir) {
 962                 $git_dir = $o_git_dir;
 963         }
 964         return $retval;
 965 }
 966
 967 # get type of given object
 968 sub git_get_type {
 969         my $hash = shift;
 970
 971         open my $fd, "-|", git_cmd(), "cat-file", '-t', $hash or return;
 972         my $type = <$fd>;
 973         close $fd or return;
 974         chomp $type;
 975         return $type;
 976 }
 977
 978 sub git_get_project_config {
 979         my ($key, $type) = @_;
 980
 981         return unless ($key);
 982         $key =~ s/^gitweb\.//;
 983         return if ($key =~ m/\W/);
 984
 985         my @x = (git_cmd(), 'repo-config');
 986         if (defined $type) { push @x, $type; }
 987         push @x, "--get";
 988         push @x, "gitweb.$key";
 989         my $val = qx(@x);
 990         chomp $val;
 991         return ($val);
 992 }
 993
 994 # get hash of given path at given ref
 995 sub git_get_hash_by_path {
 996         my $base = shift;
 997         my $path = shift || return undef;
 998         my $type = shift;
 999
1000         $path =~ s,/+$,,;
1001
1002         open my $fd, "-|", git_cmd(), "ls-tree", $base, "--", $path
1003                 or die_error(undef, "Open git-ls-tree failed");
1004         my $line = <$fd>;
1005         close $fd or return undef;
1006
1007         #'100644 blob 0fa3f3a66fb6a137f6ec2c19351ed4d807070ffa  panic.c'
1008         $line =~ m/^([0-9]+) (.+) ([0-9a-fA-F]{40})\t/;
1009         if (defined $type && $type ne $2) {
1010                 # type doesn't match
1011                 return undef;
1012         }
1013         return $3;
1014 }
1015
1016 ## ......................................................................
1017 ## git utility functions, directly accessing git repository
1018
1019 sub git_get_project_description {
1020         my $path = shift;
1021
1022         open my $fd, "$projectroot/$path/description" or return undef;
1023         my $descr = <$fd>;
1024         close $fd;
1025         chomp $descr;
1026         return $descr;
1027 }
1028
1029 sub git_get_project_url_list {
1030         my $path = shift;
1031
1032         open my $fd, "$projectroot/$path/cloneurl" or return;
1033         my @git_project_url_list = map { chomp; $_ } <$fd>;
1034         close $fd;
1035
1036         return wantarray ? @git_project_url_list : \@git_project_url_list;
1037 }
1038
1039 sub git_get_projects_list {
1040         my ($filter) = @_;
1041         my @list;
1042
1043         $filter ||= '';
1044         $filter =~ s/\.git$//;
1045
1046         if (-d $projects_list) {
1047                 # search in directory
1048                 my $dir = $projects_list . ($filter ? "/$filter" : '');
1049                 # remove the trailing "/"
1050                 $dir =~ s!/+$!!;
1051                 my $pfxlen = length("$dir");
1052
1053                 my ($check_forks) = gitweb_check_feature('forks');
1054
1055                 File::Find::find({
1056                         follow_fast => 1, # follow symbolic links
1057                         dangling_symlinks => 0, # ignore dangling symlinks, silently
1058                         wanted => sub {
1059                                 # skip project-list toplevel, if we get it.
1060                                 return if (m!^[/.]$!);
1061                                 # only directories can be git repositories
1062                                 return unless (-d $_);
1063
1064                                 my $subdir = substr($File::Find::name, $pfxlen + 1);
1065                                 # we check related file in $projectroot
1066                                 if ($check_forks and $subdir =~ m#/.#) {
1067                                         $File::Find::prune = 1;
1068                                 } elsif (check_export_ok("$projectroot/$filter/$subdir")) {
1069                                         push @list, { path => ($filter ? "$filter/" : '') . $subdir };
1070                                         $File::Find::prune = 1;
1071                                 }
1072                         },
1073                 }, "$dir");
1074
1075         } elsif (-f $projects_list) {
1076                 # read from file(url-encoded):
1077                 # 'git%2Fgit.git Linus+Torvalds'
1078                 # 'libs%2Fklibc%2Fklibc.git H.+Peter+Anvin'
1079                 # 'linux%2Fhotplug%2Fudev.git Greg+Kroah-Hartman'
1080                 open my ($fd), $projects_list or return;
1081                 while (my $line = <$fd>) {
1082                         chomp $line;
1083                         my ($path, $owner) = split ' ', $line;
1084                         $path = unescape($path);
1085                         $owner = unescape($owner);
1086                         if (!defined $path) {
1087                                 next;
1088                         }
1089                         if ($filter ne '') {
1090                                 # looking for forks;
1091                                 my $pfx = substr($path, 0, length($filter));
1092                                 if ($pfx ne $filter) {
1093                                         next;
1094                                 }
1095                                 my $sfx = substr($path, length($filter));
1096                                 if ($sfx !~ /^\/.*\.git$/) {
1097                                         next;
1098                                 }
1099                         }
1100                         if (check_export_ok("$projectroot/$path")) {
1101                                 my $pr = {
1102                                         path => $path,
1103                                         owner => to_utf8($owner),
1104                                 };
1105                                 push @list, $pr
1106                         }
1107                 }
1108                 close $fd;
1109         }
1110         @list = sort {$a->{'path'} cmp $b->{'path'}} @list;
1111         return @list;
1112 }
1113
1114 sub git_get_project_owner {
1115         my $project = shift;
1116         my $owner;
1117
1118         return undef unless $project;
1119
1120         # read from file (url-encoded):
1121         # 'git%2Fgit.git Linus+Torvalds'
1122         # 'libs%2Fklibc%2Fklibc.git H.+Peter+Anvin'
1123         # 'linux%2Fhotplug%2Fudev.git Greg+Kroah-Hartman'
1124         if (-f $projects_list) {
1125                 open (my $fd , $projects_list);
1126                 while (my $line = <$fd>) {
1127                         chomp $line;
1128                         my ($pr, $ow) = split ' ', $line;
1129                         $pr = unescape($pr);
1130                         $ow = unescape($ow);
1131                         if ($pr eq $project) {
1132                                 $owner = to_utf8($ow);
1133                                 last;
1134                         }
1135                 }
1136                 close $fd;
1137         }
1138         if (!defined $owner) {
1139                 $owner = get_file_owner("$projectroot/$project");
1140         }
1141
1142         return $owner;
1143 }
1144
1145 sub git_get_last_activity {
1146         my ($path) = @_;
1147         my $fd;
1148
1149         $git_dir = "$projectroot/$path";
1150         open($fd, "-|", git_cmd(), 'for-each-ref',
1151              '--format=%(committer)',
1152              '--sort=-committerdate',
1153              '--count=1',
1154              'refs/heads') or return;
1155         my $most_recent = <$fd>;
1156         close $fd or return;
1157         if ($most_recent =~ / (\d+) [-+][01]\d\d\d$/) {
1158                 my $timestamp = $1;
1159                 my $age = time - $timestamp;
1160                 return ($age, age_string($age));
1161         }
1162 }
1163
1164 sub git_get_references {
1165         my $type = shift || "";
1166         my %refs;
1167         # 5dc01c595e6c6ec9ccda4f6f69c131c0dd945f8c refs/tags/v2.6.11
1168         # c39ae07f393806ccf406ef966e9a15afc43cc36a refs/tags/v2.6.11^{}
1169         open my $fd, "-|", git_cmd(), "show-ref", "--dereference",
1170                 ($type ? ("--", "refs/$type") : ()) # use -- <pattern> if $type
1171                 or return;
1172
1173         while (my $line = <$fd>) {
1174                 chomp $line;
1175                 if ($line =~ m!^([0-9a-fA-F]{40})\srefs/($type/?[^^]+)!) {
1176                         if (defined $refs{$1}) {
1177                                 push @{$refs{$1}}, $2;
1178                         } else {
1179                                 $refs{$1} = [ $2 ];
1180                         }
1181                 }
1182         }
1183         close $fd or return;
1184         return \%refs;
1185 }
1186
1187 sub git_get_rev_name_tags {
1188         my $hash = shift || return undef;
1189
1190         open my $fd, "-|", git_cmd(), "name-rev", "--tags", $hash
1191                 or return;
1192         my $name_rev = <$fd>;
1193         close $fd;
1194
1195         if ($name_rev =~ m|^$hash tags/(.*)$|) {
1196                 return $1;
1197         } else {
1198                 # catches also '$hash undefined' output
1199                 return undef;
1200         }
1201 }
1202
1203 ## ----------------------------------------------------------------------
1204 ## parse to hash functions
1205
1206 sub parse_date {
1207         my $epoch = shift;
1208         my $tz = shift || "-0000";
1209
1210         my %date;
1211         my @months = ("Jan", "Feb", "Mar", "Apr", "May", "Jun", "Jul", "Aug", "Sep", "Oct", "Nov", "Dec");
1212         my @days = ("Sun", "Mon", "Tue", "Wed", "Thu", "Fri", "Sat");
1213         my ($sec, $min, $hour, $mday, $mon, $year, $wday, $yday) = gmtime($epoch);
1214         $date{'hour'} = $hour;
1215         $date{'minute'} = $min;
1216         $date{'mday'} = $mday;
1217         $date{'day'} = $days[$wday];
1218         $date{'month'} = $months[$mon];
1219         $date{'rfc2822'}   = sprintf "%s, %d %s %4d %02d:%02d:%02d +0000",
1220                              $days[$wday], $mday, $months[$mon], 1900+$year, $hour ,$min, $sec;
1221         $date{'mday-time'} = sprintf "%d %s %02d:%02d",
1222                              $mday, $months[$mon], $hour ,$min;
1223         $date{'iso-8601'}  = sprintf "%04d-%02d-%02dT%02d:%02d:%02dZ",
1224                              1900+$year, $mon, $mday, $hour ,$min, $sec;
1225
1226         $tz =~ m/^([+\-][0-9][0-9])([0-9][0-9])$/;
1227         my $local = $epoch + ((int $1 + ($2/60)) * 3600);
1228         ($sec, $min, $hour, $mday, $mon, $year, $wday, $yday) = gmtime($local);
1229         $date{'hour_local'} = $hour;
1230         $date{'minute_local'} = $min;
1231         $date{'tz_local'} = $tz;
1232         $date{'iso-tz'} = sprintf("%04d-%02d-%02d %02d:%02d:%02d %s",
1233                                   1900+$year, $mon+1, $mday,
1234                                   $hour, $min, $sec, $tz);
1235         return %date;
1236 }
1237
1238 sub parse_tag {
1239         my $tag_id = shift;
1240         my %tag;
1241         my @comment;
1242
1243         open my $fd, "-|", git_cmd(), "cat-file", "tag", $tag_id or return;
1244         $tag{'id'} = $tag_id;
1245         while (my $line = <$fd>) {
1246                 chomp $line;
1247                 if ($line =~ m/^object ([0-9a-fA-F]{40})$/) {
1248                         $tag{'object'} = $1;
1249                 } elsif ($line =~ m/^type (.+)$/) {
1250                         $tag{'type'} = $1;
1251                 } elsif ($line =~ m/^tag (.+)$/) {
1252                         $tag{'name'} = $1;
1253                 } elsif ($line =~ m/^tagger (.*) ([0-9]+) (.*)$/) {
1254                         $tag{'author'} = $1;
1255                         $tag{'epoch'} = $2;
1256                         $tag{'tz'} = $3;
1257                 } elsif ($line =~ m/--BEGIN/) {
1258                         push @comment, $line;
1259                         last;
1260                 } elsif ($line eq "") {
1261                         last;
1262                 }
1263         }
1264         push @comment, <$fd>;
1265         $tag{'comment'} = \@comment;
1266         close $fd or return;
1267         if (!defined $tag{'name'}) {
1268                 return
1269         };
1270         return %tag
1271 }
1272
1273 sub parse_commit {
1274         my $commit_id = shift;
1275         my $commit_text = shift;
1276
1277         my @commit_lines;
1278         my %co;
1279
1280         if (defined $commit_text) {
1281                 @commit_lines = @$commit_text;
1282         } else {
1283                 local $/ = "\0";
1284                 open my $fd, "-|", git_cmd(), "rev-list",
1285                         "--header", "--parents", "--max-count=1",
1286                         $commit_id, "--"
1287                         or return;
1288                 @commit_lines = split '\n', <$fd>;
1289                 close $fd or return;
1290                 pop @commit_lines;
1291         }
1292         my $header = shift @commit_lines;
1293         if (!($header =~ m/^[0-9a-fA-F]{40}/)) {
1294                 return;
1295         }
1296         ($co{'id'}, my @parents) = split ' ', $header;
1297         $co{'parents'} = \@parents;
1298         $co{'parent'} = $parents[0];
1299         while (my $line = shift @commit_lines) {
1300                 last if $line eq "\n";
1301                 if ($line =~ m/^tree ([0-9a-fA-F]{40})$/) {
1302                         $co{'tree'} = $1;
1303                 } elsif ($line =~ m/^author (.*) ([0-9]+) (.*)$/) {
1304                         $co{'author'} = $1;
1305                         $co{'author_epoch'} = $2;
1306                         $co{'author_tz'} = $3;
1307                         if ($co{'author'} =~ m/^([^<]+) <([^>]*)>/) {
1308                                 $co{'author_name'}  = $1;
1309                                 $co{'author_email'} = $2;
1310                         } else {
1311                                 $co{'author_name'} = $co{'author'};
1312                         }
1313                 } elsif ($line =~ m/^committer (.*) ([0-9]+) (.*)$/) {
1314                         $co{'committer'} = $1;
1315                         $co{'committer_epoch'} = $2;
1316                         $co{'committer_tz'} = $3;
1317                         $co{'committer_name'} = $co{'committer'};
1318                         if ($co{'committer'} =~ m/^([^<]+) <([^>]*)>/) {
1319                                 $co{'committer_name'}  = $1;
1320                                 $co{'committer_email'} = $2;
1321                         } else {
1322                                 $co{'committer_name'} = $co{'committer'};
1323                         }
1324                 }
1325         }
1326         if (!defined $co{'tree'}) {
1327                 return;
1328         };
1329
1330         foreach my $title (@commit_lines) {
1331                 $title =~ s/^    //;
1332                 if ($title ne "") {
1333                         $co{'title'} = chop_str($title, 80, 5);
1334                         # remove leading stuff of merges to make the interesting part visible
1335                         if (length($title) > 50) {
1336                                 $title =~ s/^Automatic //;
1337                                 $title =~ s/^merge (of|with) /Merge ... /i;
1338                                 if (length($title) > 50) {
1339                                         $title =~ s/(http|rsync):\/\///;
1340                                 }
1341                                 if (length($title) > 50) {
1342                                         $title =~ s/(master|www|rsync)\.//;
1343                                 }
1344                                 if (length($title) > 50) {
1345                                         $title =~ s/kernel.org:?//;
1346                                 }
1347                                 if (length($title) > 50) {
1348                                         $title =~ s/\/pub\/scm//;
1349                                 }
1350                         }
1351                         $co{'title_short'} = chop_str($title, 50, 5);
1352                         last;
1353                 }
1354         }
1355         if ($co{'title'} eq "") {
1356                 $co{'title'} = $co{'title_short'} = '(no commit message)';
1357         }
1358         # remove added spaces
1359         foreach my $line (@commit_lines) {
1360                 $line =~ s/^    //;
1361         }
1362         $co{'comment'} = \@commit_lines;
1363
1364         my $age = time - $co{'committer_epoch'};
1365         $co{'age'} = $age;
1366         $co{'age_string'} = age_string($age);
1367         my ($sec, $min, $hour, $mday, $mon, $year, $wday, $yday) = gmtime($co{'committer_epoch'});
1368         if ($age > 60*60*24*7*2) {
1369                 $co{'age_string_date'} = sprintf "%4i-%02u-%02i", 1900 + $year, $mon+1, $mday;
1370                 $co{'age_string_age'} = $co{'age_string'};
1371         } else {
1372                 $co{'age_string_date'} = $co{'age_string'};
1373                 $co{'age_string_age'} = sprintf "%4i-%02u-%02i", 1900 + $year, $mon+1, $mday;
1374         }
1375         return %co;
1376 }
1377
1378 # parse ref from ref_file, given by ref_id, with given type
1379 sub parse_ref {
1380         my $ref_file = shift;
1381         my $ref_id = shift;
1382         my $type = shift || git_get_type($ref_id);
1383         my %ref_item;
1384
1385         $ref_item{'type'} = $type;
1386         $ref_item{'id'} = $ref_id;
1387         $ref_item{'epoch'} = 0;
1388         $ref_item{'age'} = "unknown";
1389         if ($type eq "tag") {
1390                 my %tag = parse_tag($ref_id);
1391                 $ref_item{'comment'} = $tag{'comment'};
1392                 if ($tag{'type'} eq "commit") {
1393                         my %co = parse_commit($tag{'object'});
1394                         $ref_item{'epoch'} = $co{'committer_epoch'};
1395                         $ref_item{'age'} = $co{'age_string'};
1396                 } elsif (defined($tag{'epoch'})) {
1397                         my $age = time - $tag{'epoch'};
1398                         $ref_item{'epoch'} = $tag{'epoch'};
1399                         $ref_item{'age'} = age_string($age);
1400                 }
1401                 $ref_item{'reftype'} = $tag{'type'};
1402                 $ref_item{'name'} = $tag{'name'};
1403                 $ref_item{'refid'} = $tag{'object'};
1404         } elsif ($type eq "commit"){
1405                 my %co = parse_commit($ref_id);
1406                 $ref_item{'reftype'} = "commit";
1407                 $ref_item{'name'} = $ref_file;
1408                 $ref_item{'title'} = $co{'title'};
1409                 $ref_item{'refid'} = $ref_id;
1410                 $ref_item{'epoch'} = $co{'committer_epoch'};
1411                 $ref_item{'age'} = $co{'age_string'};
1412         } else {
1413                 $ref_item{'reftype'} = $type;
1414                 $ref_item{'name'} = $ref_file;
1415                 $ref_item{'refid'} = $ref_id;
1416         }
1417
1418         return %ref_item;
1419 }
1420
1421 # parse line of git-diff-tree "raw" output
1422 sub parse_difftree_raw_line {
1423         my $line = shift;
1424         my %res;
1425
1426         # ':100644 100644 03b218260e99b78c6df0ed378e59ed9205ccc96d 3b93d5e7cc7f7dd4ebed13a5cc1a4ad976fc94d8 M   ls-files.c'
1427         # ':100644 100644 7f9281985086971d3877aca27704f2aaf9c448ce bc190ebc71bbd923f2b728e505408f5e54bd073a M   rev-tree.c'
1428         if ($line =~ m/^:([0-7]{6}) ([0-7]{6}) ([0-9a-fA-F]{40}) ([0-9a-fA-F]{40}) (.)([0-9]{0,3})\t(.*)$/) {
1429                 $res{'from_mode'} = $1;
1430                 $res{'to_mode'} = $2;
1431                 $res{'from_id'} = $3;
1432                 $res{'to_id'} = $4;
1433                 $res{'status'} = $5;
1434                 $res{'similarity'} = $6;
1435                 if ($res{'status'} eq 'R' || $res{'status'} eq 'C') { # renamed or copied
1436                         ($res{'from_file'}, $res{'to_file'}) = map { unquote($_) } split("\t", $7);
1437                 } else {
1438                         $res{'file'} = unquote($7);
1439                 }
1440         }
1441         # 'c512b523472485aef4fff9e57b229d9d243c967f'
1442         elsif ($line =~ m/^([0-9a-fA-F]{40})$/) {
1443                 $res{'commit'} = $1;
1444         }
1445
1446         return wantarray ? %res : \%res;
1447 }
1448
1449 # parse line of git-ls-tree output
1450 sub parse_ls_tree_line ($;%) {
1451         my $line = shift;
1452         my %opts = @_;
1453         my %res;
1454
1455         #'100644 blob 0fa3f3a66fb6a137f6ec2c19351ed4d807070ffa  panic.c'
1456         $line =~ m/^([0-9]+) (.+) ([0-9a-fA-F]{40})\t(.+)$/s;
1457
1458         $res{'mode'} = $1;
1459         $res{'type'} = $2;
1460         $res{'hash'} = $3;
1461         if ($opts{'-z'}) {
1462                 $res{'name'} = $4;
1463         } else {
1464                 $res{'name'} = unquote($4);
1465         }
1466
1467         return wantarray ? %res : \%res;
1468 }
1469
1470 ## ......................................................................
1471 ## parse to array of hashes functions
1472
1473 sub git_get_heads_list {
1474         my $limit = shift;
1475         my @headslist;
1476
1477         open my $fd, '-|', git_cmd(), 'for-each-ref',
1478                 ($limit ? '--count='.($limit+1) : ()), '--sort=-committerdate',
1479                 '--format=%(objectname) %(refname) %(subject)%00%(committer)',
1480                 'refs/heads'
1481                 or return;
1482         while (my $line = <$fd>) {
1483                 my %ref_item;
1484
1485                 chomp $line;
1486                 my ($refinfo, $committerinfo) = split(/\0/, $line);
1487                 my ($hash, $name, $title) = split(' ', $refinfo, 3);
1488                 my ($committer, $epoch, $tz) =
1489                         ($committerinfo =~ /^(.*) ([0-9]+) (.*)$/);
1490                 $name =~ s!^refs/heads/!!;
1491
1492                 $ref_item{'name'}  = $name;
1493                 $ref_item{'id'}    = $hash;
1494                 $ref_item{'title'} = $title || '(no commit message)';
1495                 $ref_item{'epoch'} = $epoch;
1496                 if ($epoch) {
1497                         $ref_item{'age'} = age_string(time - $ref_item{'epoch'});
1498                 } else {
1499                         $ref_item{'age'} = "unknown";
1500                 }
1501
1502                 push @headslist, \%ref_item;
1503         }
1504         close $fd;
1505
1506         return wantarray ? @headslist : \@headslist;
1507 }
1508
1509 sub git_get_tags_list {
1510         my $limit = shift;
1511         my @tagslist;
1512
1513         open my $fd, '-|', git_cmd(), 'for-each-ref',
1514                 ($limit ? '--count='.($limit+1) : ()), '--sort=-creatordate',
1515                 '--format=%(objectname) %(objecttype) %(refname) '.
1516                 '%(*objectname) %(*objecttype) %(subject)%00%(creator)',
1517                 'refs/tags'
1518                 or return;
1519         while (my $line = <$fd>) {
1520                 my %ref_item;
1521
1522                 chomp $line;
1523                 my ($refinfo, $creatorinfo) = split(/\0/, $line);
1524                 my ($id, $type, $name, $refid, $reftype, $title) = split(' ', $refinfo, 6);
1525                 my ($creator, $epoch, $tz) =
1526                         ($creatorinfo =~ /^(.*) ([0-9]+) (.*)$/);
1527                 $name =~ s!^refs/tags/!!;
1528
1529                 $ref_item{'type'} = $type;
1530                 $ref_item{'id'} = $id;
1531                 $ref_item{'name'} = $name;
1532                 if ($type eq "tag") {
1533                         $ref_item{'subject'} = $title;
1534                         $ref_item{'reftype'} = $reftype;
1535                         $ref_item{'refid'}   = $refid;
1536                 } else {
1537                         $ref_item{'reftype'} = $type;
1538                         $ref_item{'refid'}   = $id;
1539                 }
1540
1541                 if ($type eq "tag" || $type eq "commit") {
1542                         $ref_item{'epoch'} = $epoch;
1543                         if ($epoch) {
1544                                 $ref_item{'age'} = age_string(time - $ref_item{'epoch'});
1545                         } else {
1546                                 $ref_item{'age'} = "unknown";
1547                         }
1548                 }
1549
1550                 push @tagslist, \%ref_item;
1551         }
1552         close $fd;
1553
1554         return wantarray ? @tagslist : \@tagslist;
1555 }
1556
1557 ## ----------------------------------------------------------------------
1558 ## filesystem-related functions
1559
1560 sub get_file_owner {
1561         my $path = shift;
1562
1563         my ($dev, $ino, $mode, $nlink, $st_uid, $st_gid, $rdev, $size) = stat($path);
1564         my ($name, $passwd, $uid, $gid, $quota, $comment, $gcos, $dir, $shell) = getpwuid($st_uid);
1565         if (!defined $gcos) {
1566                 return undef;
1567         }
1568         my $owner = $gcos;
1569         $owner =~ s/[,;].*$//;
1570         return to_utf8($owner);
1571 }
1572
1573 ## ......................................................................
1574 ## mimetype related functions
1575
1576 sub mimetype_guess_file {
1577         my $filename = shift;
1578         my $mimemap = shift;
1579         -r $mimemap or return undef;
1580
1581         my %mimemap;
1582         open(MIME, $mimemap) or return undef;
1583         while (<MIME>) {
1584                 next if m/^#/; # skip comments
1585                 my ($mime, $exts) = split(/\t+/);
1586                 if (defined $exts) {
1587                         my @exts = split(/\s+/, $exts);
1588                         foreach my $ext (@exts) {
1589                                 $mimemap{$ext} = $mime;
1590                         }
1591                 }
1592         }
1593         close(MIME);
1594
1595         $filename =~ /\.([^.]*)$/;
1596         return $mimemap{$1};
1597 }
1598
1599 sub mimetype_guess {
1600         my $filename = shift;
1601         my $mime;
1602         $filename =~ /\./ or return undef;
1603
1604         if ($mimetypes_file) {
1605                 my $file = $mimetypes_file;
1606                 if ($file !~ m!^/!) { # if it is relative path
1607                         # it is relative to project
1608                         $file = "$projectroot/$project/$file";
1609                 }
1610                 $mime = mimetype_guess_file($filename, $file);
1611         }
1612         $mime ||= mimetype_guess_file($filename, '/etc/mime.types');
1613         return $mime;
1614 }
1615
1616 sub blob_mimetype {
1617         my $fd = shift;
1618         my $filename = shift;
1619
1620         if ($filename) {
1621                 my $mime = mimetype_guess($filename);
1622                 $mime and return $mime;
1623         }
1624
1625         # just in case
1626         return $default_blob_plain_mimetype unless $fd;
1627
1628         if (-T $fd) {
1629                 return 'text/plain' .
1630                        ($default_text_plain_charset ? '; charset='.$default_text_plain_charset : '');
1631         } elsif (! $filename) {
1632                 return 'application/octet-stream';
1633         } elsif ($filename =~ m/\.png$/i) {
1634                 return 'image/png';
1635         } elsif ($filename =~ m/\.gif$/i) {
1636                 return 'image/gif';
1637         } elsif ($filename =~ m/\.jpe?g$/i) {
1638                 return 'image/jpeg';
1639         } else {
1640                 return 'application/octet-stream';
1641         }
1642 }
1643
1644 ## ======================================================================
1645 ## functions printing HTML: header, footer, error page
1646
1647 sub git_header_html {
1648         my $status = shift || "200 OK";
1649         my $expires = shift;
1650
1651         my $title = "$site_name";
1652         if (defined $project) {
1653                 $title .= " - $project";
1654                 if (defined $action) {
1655                         $title .= "/$action";
1656                         if (defined $file_name) {
1657                                 $title .= " - " . esc_path($file_name);
1658                                 if ($action eq "tree" && $file_name !~ m|/$|) {
1659                                         $title .= "/";
1660                                 }
1661                         }
1662                 }
1663         }
1664         my $content_type;
1665         # require explicit support from the UA if we are to send the page as
1666         # 'application/xhtml+xml', otherwise send it as plain old 'text/html'.
1667         # we have to do this because MSIE sometimes globs '*/*', pretending to
1668         # support xhtml+xml but choking when it gets what it asked for.
1669         if (defined $cgi->http('HTTP_ACCEPT') &&
1670             $cgi->http('HTTP_ACCEPT') =~ m/(,|;|\s|^)application\/xhtml\+xml(,|;|\s|$)/ &&
1671             $cgi->Accept('application/xhtml+xml') != 0) {
1672                 $content_type = 'application/xhtml+xml';
1673         } else {
1674                 $content_type = 'text/html';
1675         }
1676         print $cgi->header(-type=>$content_type, -charset => 'utf-8',
1677                            -status=> $status, -expires => $expires);
1678         print <<EOF;
1679 <?xml version="1.0" encoding="utf-8"?>
1680 <!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Strict//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-strict.dtd">
1681 <html xmlns="http://www.w3.org/1999/xhtml" xml:lang="en-US" lang="en-US">
1682 <!-- git web interface version $version, (C) 2005-2006, Kay Sievers <kay.sievers\@vrfy.org>, Christian Gierke -->
1683 <!-- git core binaries version $git_version -->
1684 <head>
1685 <meta http-equiv="content-type" content="$content_type; charset=utf-8"/>
1686 <meta name="generator" content="gitweb/$version git/$git_version"/>
1687 <meta name="robots" content="index, nofollow"/>
1688 <title>$title</title>
1689 EOF
1690 # print out each stylesheet that exist
1691         if (defined $stylesheet) {
1692 #provides backwards capability for those people who define style sheet in a config file
1693                 print '<link rel="stylesheet" type="text/css" href="'.$stylesheet.'"/>'."\n";
1694         } else {
1695                 foreach my $stylesheet (@stylesheets) {
1696                         next unless $stylesheet;
1697                         print '<link rel="stylesheet" type="text/css" href="'.$stylesheet.'"/>'."\n";
1698                 }
1699         }
1700         if (defined $project) {
1701                 printf('<link rel="alternate" title="%s log RSS feed" '.
1702                        'href="%s" type="application/rss+xml" />'."\n",
1703                        esc_param($project), href(action=>"rss"));
1704                 printf('<link rel="alternate" title="%s log Atom feed" '.
1705                        'href="%s" type="application/atom+xml" />'."\n",
1706                        esc_param($project), href(action=>"atom"));
1707         } else {
1708                 printf('<link rel="alternate" title="%s projects list" '.
1709                        'href="%s" type="text/plain; charset=utf-8"/>'."\n",
1710                        $site_name, href(project=>undef, action=>"project_index"));
1711                 printf('<link rel="alternate" title="%s projects feeds" '.
1712                        'href="%s" type="text/x-opml"/>'."\n",
1713                        $site_name, href(project=>undef, action=>"opml"));
1714         }
1715         if (defined $favicon) {
1716                 print qq(<link rel="shortcut icon" href="$favicon" type="image/png"/>\n);
1717         }
1718
1719         print "</head>\n" .
1720               "<body>\n";
1721
1722         if (-f $site_header) {
1723                 open (my $fd, $site_header);
1724                 print <$fd>;
1725                 close $fd;
1726         }
1727
1728         print "<div class=\"page_header\">\n" .
1729               $cgi->a({-href => esc_url($logo_url),
1730                        -title => $logo_label},
1731                       qq(<img src="$logo" width="72" height="27" alt="git" class="logo"/>));
1732         print $cgi->a({-href => esc_url($home_link)}, $home_link_str) . " / ";
1733         if (defined $project) {
1734                 print $cgi->a({-href => href(action=>"summary")}, esc_html($project));
1735                 if (defined $action) {
1736                         print " / $action";
1737                 }
1738                 print "\n";
1739         }
1740         my ($have_search) = gitweb_check_feature('search');
1741         if ((defined $project) && ($have_search)) {
1742                 if (!defined $searchtext) {
1743                         $searchtext = "";
1744                 }
1745                 my $search_hash;
1746                 if (defined $hash_base) {
1747                         $search_hash = $hash_base;
1748                 } elsif (defined $hash) {
1749                         $search_hash = $hash;
1750                 } else {
1751                         $search_hash = "HEAD";
1752                 }
1753                 $cgi->param("a", "search");
1754                 $cgi->param("h", $search_hash);
1755                 $cgi->param("p", $project);
1756                 print $cgi->startform(-method => "get", -action => $my_uri) .
1757                       "<div class=\"search\">\n" .
1758                       $cgi->hidden(-name => "p") . "\n" .
1759                       $cgi->hidden(-name => "a") . "\n" .
1760                       $cgi->hidden(-name => "h") . "\n" .
1761                       $cgi->popup_menu(-name => 'st', -default => 'commit',
1762                                        -values => ['commit', 'author', 'committer', 'pickaxe']) .
1763                       $cgi->sup($cgi->a({-href => href(action=>"search_help")}, "?")) .
1764                       " search:\n",
1765                       $cgi->textfield(-name => "s", -value => $searchtext) . "\n" .
1766                       "</div>" .
1767                       $cgi->end_form() . "\n";
1768         }
1769         print "</div>\n";
1770 }
1771
1772 sub git_footer_html {
1773         print "<div class=\"page_footer\">\n";
1774         if (defined $project) {
1775                 my $descr = git_get_project_description($project);
1776                 if (defined $descr) {
1777                         print "<div class=\"page_footer_text\">" . esc_html($descr) . "</div>\n";
1778                 }
1779                 print $cgi->a({-href => href(action=>"rss"),
1780                               -class => "rss_logo"}, "RSS") . " ";
1781                 print $cgi->a({-href => href(action=>"atom"),
1782                               -class => "rss_logo"}, "Atom") . "\n";
1783         } else {
1784                 print $cgi->a({-href => href(project=>undef, action=>"opml"),
1785                               -class => "rss_logo"}, "OPML") . " ";
1786                 print $cgi->a({-href => href(project=>undef, action=>"project_index"),
1787                               -class => "rss_logo"}, "TXT") . "\n";
1788         }
1789         print "</div>\n" ;
1790
1791         if (-f $site_footer) {
1792                 open (my $fd, $site_footer);
1793                 print <$fd>;
1794                 close $fd;
1795         }
1796
1797         print "</body>\n" .
1798               "</html>";
1799 }
1800
1801 sub die_error {
1802         my $status = shift || "403 Forbidden";
1803         my $error = shift || "Malformed query, file missing or permission denied";
1804
1805         git_header_html($status);
1806         print <<EOF;
1807 <div class="page_body">
1808 <br /><br />
1809 $status - $error
1810 <br />
1811 </div>
1812 EOF
1813         git_footer_html();
1814         exit;
1815 }
1816
1817 ## ----------------------------------------------------------------------
1818 ## functions printing or outputting HTML: navigation
1819
1820 sub git_print_page_nav {
1821         my ($current, $suppress, $head, $treehead, $treebase, $extra) = @_;
1822         $extra = '' if !defined $extra; # pager or formats
1823
1824         my @navs = qw(summary shortlog log commit commitdiff tree);
1825         if ($suppress) {
1826                 @navs = grep { $_ ne $suppress } @navs;
1827         }
1828
1829         my %arg = map { $_ => {action=>$_} } @navs;
1830         if (defined $head) {
1831                 for (qw(commit commitdiff)) {
1832                         $arg{$_}{hash} = $head;
1833                 }
1834                 if ($current =~ m/^(tree | log | shortlog | commit | commitdiff | search)$/x) {
1835                         for (qw(shortlog log)) {
1836                                 $arg{$_}{hash} = $head;
1837                         }
1838                 }
1839         }
1840         $arg{tree}{hash} = $treehead if defined $treehead;
1841         $arg{tree}{hash_base} = $treebase if defined $treebase;
1842
1843         print "<div class=\"page_nav\">\n" .
1844                 (join " | ",
1845                  map { $_ eq $current ?
1846                        $_ : $cgi->a({-href => href(%{$arg{$_}})}, "$_")
1847                  } @navs);
1848         print "<br/>\n$extra<br/>\n" .
1849               "</div>\n";
1850 }
1851
1852 sub format_paging_nav {
1853         my ($action, $hash, $head, $page, $nrevs) = @_;
1854         my $paging_nav;
1855
1856
1857         if ($hash ne $head || $page) {
1858                 $paging_nav .= $cgi->a({-href => href(action=>$action)}, "HEAD");
1859         } else {
1860                 $paging_nav .= "HEAD";
1861         }
1862
1863         if ($page > 0) {
1864                 $paging_nav .= " &sdot; " .
1865                         $cgi->a({-href => href(action=>$action, hash=>$hash, page=>$page-1),
1866                                  -accesskey => "p", -title => "Alt-p"}, "prev");
1867         } else {
1868                 $paging_nav .= " &sdot; prev";
1869         }
1870
1871         if ($nrevs >= (100 * ($page+1)-1)) {
1872                 $paging_nav .= " &sdot; " .
1873                         $cgi->a({-href => href(action=>$action, hash=>$hash, page=>$page+1),
1874                                  -accesskey => "n", -title => "Alt-n"}, "next");
1875         } else {
1876                 $paging_nav .= " &sdot; next";
1877         }
1878
1879         return $paging_nav;
1880 }
1881
1882 ## ......................................................................
1883 ## functions printing or outputting HTML: div
1884
1885 sub git_print_header_div {
1886         my ($action, $title, $hash, $hash_base) = @_;
1887         my %args = ();
1888
1889         $args{action} = $action;
1890         $args{hash} = $hash if $hash;
1891         $args{hash_base} = $hash_base if $hash_base;
1892
1893         print "<div class=\"header\">\n" .
1894               $cgi->a({-href => href(%args), -class => "title"},
1895               $title ? $title : $action) .
1896               "\n</div>\n";
1897 }
1898
1899 #sub git_print_authorship (\%) {
1900 sub git_print_authorship {
1901         my $co = shift;
1902
1903         my %ad = parse_date($co->{'author_epoch'}, $co->{'author_tz'});
1904         print "<div class=\"author_date\">" .
1905               esc_html($co->{'author_name'}) .
1906               " [$ad{'rfc2822'}";
1907         if ($ad{'hour_local'} < 6) {
1908                 printf(" (<span class=\"atnight\">%02d:%02d</span> %s)",
1909                        $ad{'hour_local'}, $ad{'minute_local'}, $ad{'tz_local'});
1910         } else {
1911                 printf(" (%02d:%02d %s)",
1912                        $ad{'hour_local'}, $ad{'minute_local'}, $ad{'tz_local'});
1913         }
1914         print "]</div>\n";
1915 }
1916
1917 sub git_print_page_path {
1918         my $name = shift;
1919         my $type = shift;
1920         my $hb = shift;
1921
1922
1923         print "<div class=\"page_path\">";
1924         print $cgi->a({-href => href(action=>"tree", hash_base=>$hb),
1925                       -title => 'tree root'}, "[$project]");
1926         print " / ";
1927         if (defined $name) {
1928                 my @dirname = split '/', $name;
1929                 my $basename = pop @dirname;
1930                 my $fullname = '';
1931
1932                 foreach my $dir (@dirname) {
1933                         $fullname .= ($fullname ? '/' : '') . $dir;
1934                         print $cgi->a({-href => href(action=>"tree", file_name=>$fullname,
1935                                                      hash_base=>$hb),
1936                                       -title => esc_html($fullname)}, esc_path($dir));
1937                         print " / ";
1938                 }
1939                 if (defined $type && $type eq 'blob') {
1940                         print $cgi->a({-href => href(action=>"blob_plain", file_name=>$file_name,
1941                                                      hash_base=>$hb),
1942                                       -title => esc_html($name)}, esc_path($basename));
1943                 } elsif (defined $type && $type eq 'tree') {
1944                         print $cgi->a({-href => href(action=>"tree", file_name=>$file_name,
1945                                                      hash_base=>$hb),
1946                                       -title => esc_html($name)}, esc_path($basename));
1947                         print " / ";
1948                 } else {
1949                         print esc_path($basename);
1950                 }
1951         }
1952         print "<br/></div>\n";
1953 }
1954
1955 # sub git_print_log (\@;%) {
1956 sub git_print_log ($;%) {
1957         my $log = shift;
1958         my %opts = @_;
1959
1960         if ($opts{'-remove_title'}) {
1961                 # remove title, i.e. first line of log
1962                 shift @$log;
1963         }
1964         # remove leading empty lines
1965         while (defined $log->[0] && $log->[0] eq "") {
1966                 shift @$log;
1967         }
1968
1969         # print log
1970         my $signoff = 0;
1971         my $empty = 0;
1972         foreach my $line (@$log) {
1973                 if ($line =~ m/^ *(signed[ \-]off[ \-]by[ :]|acked[ \-]by[ :]|cc[ :])/i) {
1974                         $signoff = 1;
1975                         $empty = 0;
1976                         if (! $opts{'-remove_signoff'}) {
1977                                 print "<span class=\"signoff\">" . esc_html($line) . "</span><br/>\n";
1978                                 next;
1979                         } else {
1980                                 # remove signoff lines
1981                                 next;
1982                         }
1983                 } else {
1984                         $signoff = 0;
1985                 }
1986
1987                 # print only one empty line
1988                 # do not print empty line after signoff
1989                 if ($line eq "") {
1990                         next if ($empty || $signoff);
1991                         $empty = 1;
1992                 } else {
1993                         $empty = 0;
1994                 }
1995
1996                 print format_log_line_html($line) . "<br/>\n";
1997         }
1998
1999         if ($opts{'-final_empty_line'}) {
2000                 # end with single empty line
2001                 print "<br/>\n" unless $empty;
2002         }
2003 }
2004
2005 # return link target (what link points to)
2006 sub git_get_link_target {
2007         my $hash = shift;
2008         my $link_target;
2009
2010         # read link
2011         open my $fd, "-|", git_cmd(), "cat-file", "blob", $hash
2012                 or return;
2013         {
2014                 local $/;
2015                 $link_target = <$fd>;
2016         }
2017         close $fd
2018                 or return;
2019
2020         return $link_target;
2021 }
2022
2023 # given link target, and the directory (basedir) the link is in,
2024 # return target of link relative to top directory (top tree);
2025 # return undef if it is not possible (including absolute links).
2026 sub normalize_link_target {
2027         my ($link_target, $basedir, $hash_base) = @_;
2028
2029         # we can normalize symlink target only if $hash_base is provided
2030         return unless $hash_base;
2031
2032         # absolute symlinks (beginning with '/') cannot be normalized
2033         return if (substr($link_target, 0, 1) eq '/');
2034
2035         # normalize link target to path from top (root) tree (dir)
2036         my $path;
2037         if ($basedir) {
2038                 $path = $basedir . '/' . $link_target;
2039         } else {
2040                 # we are in top (root) tree (dir)
2041                 $path = $link_target;
2042         }
2043
2044         # remove //, /./, and /../
2045         my @path_parts;
2046         foreach my $part (split('/', $path)) {
2047                 # discard '.' and ''
2048                 next if (!$part || $part eq '.');
2049                 # handle '..'
2050                 if ($part eq '..') {
2051                         if (@path_parts) {
2052                                 pop @path_parts;
2053                         } else {
2054                                 # link leads outside repository (outside top dir)
2055                                 return;
2056                         }
2057                 } else {
2058                         push @path_parts, $part;
2059                 }
2060         }
2061         $path = join('/', @path_parts);
2062
2063         return $path;
2064 }
2065
2066 # print tree entry (row of git_tree), but without encompassing <tr> element
2067 sub git_print_tree_entry {
2068         my ($t, $basedir, $hash_base, $have_blame) = @_;
2069
2070         my %base_key = ();
2071         $base_key{'hash_base'} = $hash_base if defined $hash_base;
2072
2073         # The format of a table row is: mode list link.  Where mode is
2074         # the mode of the entry, list is the name of the entry, an href,
2075         # and link is the action links of the entry.
2076
2077         print "<td class=\"mode\">" . mode_str($t->{'mode'}) . "</td>\n";
2078         if ($t->{'type'} eq "blob") {
2079                 print "<td class=\"list\">" .
2080                         $cgi->a({-href => href(action=>"blob", hash=>$t->{'hash'},
2081                                                file_name=>"$basedir$t->{'name'}", %base_key),
2082                                 -class => "list"}, esc_path($t->{'name'}));
2083                 if (S_ISLNK(oct $t->{'mode'})) {
2084                         my $link_target = git_get_link_target($t->{'hash'});
2085                         if ($link_target) {
2086                                 my $norm_target = normalize_link_target($link_target, $basedir, $hash_base);
2087                                 if (defined $norm_target) {
2088                                         print " -> " .
2089                                               $cgi->a({-href => href(action=>"object", hash_base=>$hash_base,
2090                                                                      file_name=>$norm_target),
2091                                                        -title => $norm_target}, esc_path($link_target));
2092                                 } else {
2093                                         print " -> " . esc_path($link_target);
2094                                 }
2095                         }
2096                 }
2097                 print "</td>\n";
2098                 print "<td class=\"link\">";
2099                 print $cgi->a({-href => href(action=>"blob", hash=>$t->{'hash'},
2100                                              file_name=>"$basedir$t->{'name'}", %base_key)},
2101                               "blob");
2102                 if ($have_blame) {
2103                         print " | " .
2104                               $cgi->a({-href => href(action=>"blame", hash=>$t->{'hash'},
2105                                                      file_name=>"$basedir$t->{'name'}", %base_key)},
2106                                       "blame");
2107                 }
2108                 if (defined $hash_base) {
2109                         print " | " .
2110                               $cgi->a({-href => href(action=>"history", hash_base=>$hash_base,
2111                                                      hash=>$t->{'hash'}, file_name=>"$basedir$t->{'name'}")},
2112                                       "history");
2113                 }
2114                 print " | " .
2115                         $cgi->a({-href => href(action=>"blob_plain", hash_base=>$hash_base,
2116                                                file_name=>"$basedir$t->{'name'}")},
2117                                 "raw");
2118                 print "</td>\n";
2119
2120         } elsif ($t->{'type'} eq "tree") {
2121                 print "<td class=\"list\">";
2122                 print $cgi->a({-href => href(action=>"tree", hash=>$t->{'hash'},
2123                                              file_name=>"$basedir$t->{'name'}", %base_key)},
2124                               esc_path($t->{'name'}));
2125                 print "</td>\n";
2126                 print "<td class=\"link\">";
2127                 print $cgi->a({-href => href(action=>"tree", hash=>$t->{'hash'},
2128                                              file_name=>"$basedir$t->{'name'}", %base_key)},
2129                               "tree");
2130                 if (defined $hash_base) {
2131                         print " | " .
2132                               $cgi->a({-href => href(action=>"history", hash_base=>$hash_base,
2133                                                      file_name=>"$basedir$t->{'name'}")},
2134                                       "history");
2135                 }
2136                 print "</td>\n";
2137         }
2138 }
2139
2140 ## ......................................................................
2141 ## functions printing large fragments of HTML
2142
2143 sub git_difftree_body {
2144         my ($difftree, $hash, $parent) = @_;
2145         my ($have_blame) = gitweb_check_feature('blame');
2146         print "<div class=\"list_head\">\n";
2147         if ($#{$difftree} > 10) {
2148                 print(($#{$difftree} + 1) . " files changed:\n");
2149         }
2150         print "</div>\n";
2151
2152         print "<table class=\"diff_tree\">\n";
2153         my $alternate = 1;
2154         my $patchno = 0;
2155         foreach my $line (@{$difftree}) {
2156                 my %diff = parse_difftree_raw_line($line);
2157
2158                 if ($alternate) {
2159                         print "<tr class=\"dark\">\n";
2160                 } else {
2161                         print "<tr class=\"light\">\n";
2162                 }
2163                 $alternate ^= 1;
2164
2165                 my ($to_mode_oct, $to_mode_str, $to_file_type);
2166                 my ($from_mode_oct, $from_mode_str, $from_file_type);
2167                 if ($diff{'to_mode'} ne ('0' x 6)) {
2168                         $to_mode_oct = oct $diff{'to_mode'};
2169                         if (S_ISREG($to_mode_oct)) { # only for regular file
2170                                 $to_mode_str = sprintf("%04o", $to_mode_oct & 0777); # permission bits
2171                         }
2172                         $to_file_type = file_type($diff{'to_mode'});
2173                 }
2174                 if ($diff{'from_mode'} ne ('0' x 6)) {
2175                         $from_mode_oct = oct $diff{'from_mode'};
2176                         if (S_ISREG($to_mode_oct)) { # only for regular file
2177                                 $from_mode_str = sprintf("%04o", $from_mode_oct & 0777); # permission bits
2178                         }
2179                         $from_file_type = file_type($diff{'from_mode'});
2180                 }
2181
2182                 if ($diff{'status'} eq "A") { # created
2183                         my $mode_chng = "<span class=\"file_status new\">[new $to_file_type";
2184                         $mode_chng   .= " with mode: $to_mode_str" if $to_mode_str;
2185                         $mode_chng   .= "]</span>";
2186                         print "<td>";
2187                         print $cgi->a({-href => href(action=>"blob", hash=>$diff{'to_id'},
2188                                                      hash_base=>$hash, file_name=>$diff{'file'}),
2189                                       -class => "list"}, esc_path($diff{'file'}));
2190                         print "</td>\n";
2191                         print "<td>$mode_chng</td>\n";
2192                         print "<td class=\"link\">";
2193                         if ($action eq 'commitdiff') {
2194                                 # link to patch
2195                                 $patchno++;
2196                                 print $cgi->a({-href => "#patch$patchno"}, "patch");
2197                                 print " | ";
2198                         }
2199                         print $cgi->a({-href => href(action=>"blob", hash=>$diff{'to_id'},
2200                                                      hash_base=>$hash, file_name=>$diff{'file'})},
2201                                       "blob") . " | ";
2202                         print "</td>\n";
2203
2204                 } elsif ($diff{'status'} eq "D") { # deleted
2205                         my $mode_chng = "<span class=\"file_status deleted\">[deleted $from_file_type]</span>";
2206                         print "<td>";
2207                         print $cgi->a({-href => href(action=>"blob", hash=>$diff{'from_id'},
2208                                                      hash_base=>$parent, file_name=>$diff{'file'}),
2209                                        -class => "list"}, esc_path($diff{'file'}));
2210                         print "</td>\n";
2211                         print "<td>$mode_chng</td>\n";
2212                         print "<td class=\"link\">";
2213                         if ($action eq 'commitdiff') {
2214                                 # link to patch
2215                                 $patchno++;
2216                                 print $cgi->a({-href => "#patch$patchno"}, "patch");
2217                                 print " | ";
2218                         }
2219                         print $cgi->a({-href => href(action=>"blob", hash=>$diff{'from_id'},
2220                                                      hash_base=>$parent, file_name=>$diff{'file'})},
2221                                       "blob") . " | ";
2222                         if ($have_blame) {
2223                                 print $cgi->a({-href => href(action=>"blame", hash_base=>$parent,
2224                                                              file_name=>$diff{'file'})},
2225                                               "blame") . " | ";
2226                         }
2227                         print $cgi->a({-href => href(action=>"history", hash_base=>$parent,
2228                                                      file_name=>$diff{'file'})},
2229                                       "history");
2230                         print "</td>\n";
2231
2232                 } elsif ($diff{'status'} eq "M" || $diff{'status'} eq "T") { # modified, or type changed
2233                         my $mode_chnge = "";
2234                         if ($diff{'from_mode'} != $diff{'to_mode'}) {
2235                                 $mode_chnge = "<span class=\"file_status mode_chnge\">[changed";
2236                                 if ($from_file_type != $to_file_type) {
2237                                         $mode_chnge .= " from $from_file_type to $to_file_type";
2238                                 }
2239                                 if (($from_mode_oct & 0777) != ($to_mode_oct & 0777)) {
2240                                         if ($from_mode_str && $to_mode_str) {
2241                                                 $mode_chnge .= " mode: $from_mode_str->$to_mode_str";
2242                                         } elsif ($to_mode_str) {
2243                                                 $mode_chnge .= " mode: $to_mode_str";
2244                                         }
2245                                 }
2246                                 $mode_chnge .= "]</span>\n";
2247                         }
2248                         print "<td>";
2249                         print $cgi->a({-href => href(action=>"blob", hash=>$diff{'to_id'},
2250                                                      hash_base=>$hash, file_name=>$diff{'file'}),
2251                                       -class => "list"}, esc_path($diff{'file'}));
2252                         print "</td>\n";
2253                         print "<td>$mode_chnge</td>\n";
2254                         print "<td class=\"link\">";
2255                         if ($action eq 'commitdiff') {
2256                                 # link to patch
2257                                 $patchno++;
2258                                 print $cgi->a({-href => "#patch$patchno"}, "patch") .
2259                                       " | ";
2260                         } elsif ($diff{'to_id'} ne $diff{'from_id'}) {
2261                                 # "commit" view and modified file (not onlu mode changed)
2262                                 print $cgi->a({-href => href(action=>"blobdiff",
2263                                                              hash=>$diff{'to_id'}, hash_parent=>$diff{'from_id'},
2264                                                              hash_base=>$hash, hash_parent_base=>$parent,
2265                                                              file_name=>$diff{'file'})},
2266                                               "diff") .
2267                                       " | ";
2268                         }
2269                         print $cgi->a({-href => href(action=>"blob", hash=>$diff{'to_id'},
2270                                                      hash_base=>$hash, file_name=>$diff{'file'})},
2271                                        "blob") . " | ";
2272                         if ($have_blame) {
2273                                 print $cgi->a({-href => href(action=>"blame", hash_base=>$hash,
2274                                                              file_name=>$diff{'file'})},
2275                                               "blame") . " | ";
2276                         }
2277                         print $cgi->a({-href => href(action=>"history", hash_base=>$hash,
2278                                                      file_name=>$diff{'file'})},
2279                                       "history");
2280                         print "</td>\n";
2281
2282                 } elsif ($diff{'status'} eq "R" || $diff{'status'} eq "C") { # renamed or copied
2283                         my %status_name = ('R' => 'moved', 'C' => 'copied');
2284                         my $nstatus = $status_name{$diff{'status'}};
2285                         my $mode_chng = "";
2286                         if ($diff{'from_mode'} != $diff{'to_mode'}) {
2287                                 # mode also for directories, so we cannot use $to_mode_str
2288                                 $mode_chng = sprintf(", mode: %04o", $to_mode_oct & 0777);
2289                         }
2290                         print "<td>" .
2291                               $cgi->a({-href => href(action=>"blob", hash_base=>$hash,
2292                                                      hash=>$diff{'to_id'}, file_name=>$diff{'to_file'}),
2293                                       -class => "list"}, esc_path($diff{'to_file'})) . "</td>\n" .
2294                               "<td><span class=\"file_status $nstatus\">[$nstatus from " .
2295                               $cgi->a({-href => href(action=>"blob", hash_base=>$parent,
2296                                                      hash=>$diff{'from_id'}, file_name=>$diff{'from_file'}),
2297                                       -class => "list"}, esc_path($diff{'from_file'})) .
2298                               " with " . (int $diff{'similarity'}) . "% similarity$mode_chng]</span></td>\n" .
2299                               "<td class=\"link\">";
2300                         if ($action eq 'commitdiff') {
2301                                 # link to patch
2302                                 $patchno++;
2303                                 print $cgi->a({-href => "#patch$patchno"}, "patch") .
2304                                       " | ";
2305                         } elsif ($diff{'to_id'} ne $diff{'from_id'}) {
2306                                 # "commit" view and modified file (not only pure rename or copy)
2307                                 print $cgi->a({-href => href(action=>"blobdiff",
2308                                                              hash=>$diff{'to_id'}, hash_parent=>$diff{'from_id'},
2309                                                              hash_base=>$hash, hash_parent_base=>$parent,
2310                                                              file_name=>$diff{'to_file'}, file_parent=>$diff{'from_file'})},
2311                                               "diff") .
2312                                       " | ";
2313                         }
2314                         print $cgi->a({-href => href(action=>"blob", hash=>$diff{'to_id'},
2315                                                      hash_base=>$parent, file_name=>$diff{'to_file'})},
2316                                       "blob") . " | ";
2317                         if ($have_blame) {
2318                                 print $cgi->a({-href => href(action=>"blame", hash_base=>$hash,
2319                                                              file_name=>$diff{'to_file'})},
2320                                               "blame") . " | ";
2321                         }
2322                         print $cgi->a({-href => href(action=>"history", hash_base=>$hash,
2323                                                     file_name=>$diff{'to_file'})},
2324                                       "history");
2325                         print "</td>\n";
2326
2327                 } # we should not encounter Unmerged (U) or Unknown (X) status
2328                 print "</tr>\n";
2329         }
2330         print "</table>\n";
2331 }
2332
2333 sub git_patchset_body {
2334         my ($fd, $difftree, $hash, $hash_parent) = @_;
2335
2336         my $patch_idx = 0;
2337         my $patch_line;
2338         my $diffinfo;
2339         my (%from, %to);
2340         my ($from_id, $to_id);
2341
2342         print "<div class=\"patchset\">\n";
2343
2344         # skip to first patch
2345         while ($patch_line = <$fd>) {
2346                 chomp $patch_line;
2347
2348                 last if ($patch_line =~ m/^diff /);
2349         }
2350
2351  PATCH:
2352         while ($patch_line) {
2353                 my @diff_header;
2354
2355                 # git diff header
2356                 #assert($patch_line =~ m/^diff /) if DEBUG;
2357                 #assert($patch_line !~ m!$/$!) if DEBUG; # is chomp-ed
2358                 push @diff_header, $patch_line;
2359
2360                 # extended diff header
2361         EXTENDED_HEADER:
2362                 while ($patch_line = <$fd>) {
2363                         chomp $patch_line;
2364
2365                         last EXTENDED_HEADER if ($patch_line =~ m/^--- /);
2366
2367                         if ($patch_line =~ m/^index ([0-9a-fA-F]{40})..([0-9a-fA-F]{40})/) {
2368                                 $from_id = $1;
2369                                 $to_id   = $2;
2370                         }
2371
2372                         push @diff_header, $patch_line;
2373                 }
2374                 #last PATCH unless $patch_line;
2375                 my $last_patch_line = $patch_line;
2376
2377                 # check if current patch belong to current raw line
2378                 # and parse raw git-diff line if needed
2379                 if (defined $diffinfo &&
2380                     $diffinfo->{'from_id'} eq $from_id &&
2381                     $diffinfo->{'to_id'}   eq $to_id) {
2382                         # this is split patch
2383                         print "<div class=\"patch cont\">\n";
2384                 } else {
2385                         # advance raw git-diff output if needed
2386                         $patch_idx++ if defined $diffinfo;
2387
2388                         # read and prepare patch information
2389                         if (ref($difftree->[$patch_idx]) eq "HASH") {
2390                                 # pre-parsed (or generated by hand)
2391                                 $diffinfo = $difftree->[$patch_idx];
2392                         } else {
2393                                 $diffinfo = parse_difftree_raw_line($difftree->[$patch_idx]);
2394                         }
2395                         $from{'file'} = $diffinfo->{'from_file'} || $diffinfo->{'file'};
2396                         $to{'file'}   = $diffinfo->{'to_file'}   || $diffinfo->{'file'};
2397                         if ($diffinfo->{'status'} ne "A") { # not new (added) file
2398                                 $from{'href'} = href(action=>"blob", hash_base=>$hash_parent,
2399                                                      hash=>$diffinfo->{'from_id'},
2400                                                      file_name=>$from{'file'});
2401                         }
2402                         if ($diffinfo->{'status'} ne "D") { # not deleted file
2403                                 $to{'href'} = href(action=>"blob", hash_base=>$hash,
2404                                                    hash=>$diffinfo->{'to_id'},
2405                                                    file_name=>$to{'file'});
2406                         }
2407                         # this is first patch for raw difftree line with $patch_idx index
2408                         # we index @$difftree array from 0, but number patches from 1
2409                         print "<div class=\"patch\" id=\"patch". ($patch_idx+1) ."\">\n";
2410                 }
2411
2412                 # print "git diff" header
2413                 $patch_line = shift @diff_header;
2414                 $patch_line =~ s!^(diff (.*?) )"?a/.*$!$1!;
2415                 if ($from{'href'}) {
2416                         $patch_line .= $cgi->a({-href => $from{'href'}, -class => "path"},
2417                                                'a/' . esc_path($from{'file'}));
2418                 } else { # file was added
2419                         $patch_line .= 'a/' . esc_path($from{'file'});
2420                 }
2421                 $patch_line .= ' ';
2422                 if ($to{'href'}) {
2423                         $patch_line .= $cgi->a({-href => $to{'href'}, -class => "path"},
2424                                                'b/' . esc_path($to{'file'}));
2425                 } else { # file was deleted
2426                         $patch_line .= 'b/' . esc_path($to{'file'});
2427                 }
2428                 print "<div class=\"diff header\">$patch_line</div>\n";
2429
2430                 # print extended diff header
2431                 print "<div class=\"diff extended_header\">\n" if (@diff_header > 0);
2432         EXTENDED_HEADER:
2433                 foreach $patch_line (@diff_header) {
2434                         # match <path>
2435                         if ($patch_line =~ s!^((copy|rename) from ).*$!$1! && $from{'href'}) {
2436                                 $patch_line .= $cgi->a({-href=>$from{'href'}, -class=>"path"},
2437                                                         esc_path($from{'file'}));
2438                         }
2439                         if ($patch_line =~ s!^((copy|rename) to ).*$!$1! && $to{'href'}) {
2440                                 $patch_line = $cgi->a({-href=>$to{'href'}, -class=>"path"},
2441                                                       esc_path($to{'file'}));
2442                         }
2443                         # match <mode>
2444                         if ($patch_line =~ m/\s(\d{6})$/) {
2445                                 $patch_line .= '<span class="info"> (' .
2446                                                file_type_long($1) .
2447                                                ')</span>';
2448                         }
2449                         # match <hash>
2450                         if ($patch_line =~ m/^index/) {
2451                                 my ($from_link, $to_link);
2452                                 if ($from{'href'}) {
2453                                         $from_link = $cgi->a({-href=>$from{'href'}, -class=>"hash"},
2454                                                              substr($diffinfo->{'from_id'},0,7));
2455                                 } else {
2456                                         $from_link = '0' x 7;
2457                                 }
2458                                 if ($to{'href'}) {
2459                                         $to_link = $cgi->a({-href=>$to{'href'}, -class=>"hash"},
2460                                                            substr($diffinfo->{'to_id'},0,7));
2461                                 } else {
2462                                         $to_link = '0' x 7;
2463                                 }
2464                                 #affirm {
2465                                 #       my ($from_hash, $to_hash) =
2466                                 #               ($patch_line =~ m/^index ([0-9a-fA-F]{40})..([0-9a-fA-F]{40})/);
2467                                 #       my ($from_id, $to_id) =
2468                                 #               ($diffinfo->{'from_id'}, $diffinfo->{'to_id'});
2469                                 #       ($from_hash eq $from_id) && ($to_hash eq $to_id);
2470                                 #} if DEBUG;
2471                                 my ($from_id, $to_id) = ($diffinfo->{'from_id'}, $diffinfo->{'to_id'});
2472                                 $patch_line =~ s!$from_id\.\.$to_id!$from_link..$to_link!;
2473                         }
2474                         print $patch_line . "<br/>\n";
2475                 }
2476                 print "</div>\n"  if (@diff_header > 0); # class="diff extended_header"
2477
2478                 # from-file/to-file diff header
2479                 $patch_line = $last_patch_line;
2480                 #assert($patch_line =~ m/^---/) if DEBUG;
2481                 if ($from{'href'}) {
2482                         $patch_line = '--- a/' .
2483                                       $cgi->a({-href=>$from{'href'}, -class=>"path"},
2484                                               esc_path($from{'file'}));
2485                 }
2486                 print "<div class=\"diff from_file\">$patch_line</div>\n";
2487
2488                 $patch_line = <$fd>;
2489                 #last PATCH unless $patch_line;
2490                 chomp $patch_line;
2491
2492                 #assert($patch_line =~ m/^+++/) if DEBUG;
2493                 if ($to{'href'}) {
2494                         $patch_line = '+++ b/' .
2495                                       $cgi->a({-href=>$to{'href'}, -class=>"path"},
2496                                               esc_path($to{'file'}));
2497                 }
2498                 print "<div class=\"diff to_file\">$patch_line</div>\n";
2499
2500                 # the patch itself
2501         LINE:
2502                 while ($patch_line = <$fd>) {
2503                         chomp $patch_line;
2504
2505                         next PATCH if ($patch_line =~ m/^diff /);
2506
2507                         print format_diff_line($patch_line, \%from, \%to);
2508                 }
2509
2510         } continue {
2511                 print "</div>\n"; # class="patch"
2512         }
2513
2514         print "</div>\n"; # class="patchset"
2515 }
2516
2517 # . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
2518
2519 sub git_project_list_body {
2520         my ($projlist, $order, $from, $to, $extra, $no_header) = @_;
2521
2522         my ($check_forks) = gitweb_check_feature('forks');
2523
2524         my @projects;
2525         foreach my $pr (@$projlist) {
2526                 my (@aa) = git_get_last_activity($pr->{'path'});
2527                 unless (@aa) {
2528                         next;
2529                 }
2530                 ($pr->{'age'}, $pr->{'age_string'}) = @aa;
2531                 if (!defined $pr->{'descr'}) {
2532                         my $descr = git_get_project_description($pr->{'path'}) || "";
2533                         $pr->{'descr_long'} = to_utf8($descr);
2534                         $pr->{'descr'} = chop_str($descr, 25, 5);
2535                 }
2536                 if (!defined $pr->{'owner'}) {
2537                         $pr->{'owner'} = get_file_owner("$projectroot/$pr->{'path'}") || "";
2538                 }
2539                 if ($check_forks) {
2540                         my $pname = $pr->{'path'};
2541                         if (($pname =~ s/\.git$//) &&
2542                             ($pname !~ /\/$/) &&
2543                             (-d "$projectroot/$pname")) {
2544                                 $pr->{'forks'} = "-d $projectroot/$pname";
2545                         }
2546                         else {
2547                                 $pr->{'forks'} = 0;
2548                         }
2549                 }
2550                 push @projects, $pr;
2551         }
2552
2553         $order ||= "project";
2554         $from = 0 unless defined $from;
2555         $to = $#projects if (!defined $to || $#projects < $to);
2556
2557         print "<table class=\"project_list\">\n";
2558         unless ($no_header) {
2559                 print "<tr>\n";
2560                 if ($check_forks) {
2561                         print "<th></th>\n";
2562                 }
2563                 if ($order eq "project") {
2564                         @projects = sort {$a->{'path'} cmp $b->{'path'}} @projects;
2565                         print "<th>Project</th>\n";
2566                 } else {
2567                         print "<th>" .
2568                               $cgi->a({-href => href(project=>undef, order=>'project'),
2569                                        -class => "header"}, "Project") .
2570                               "</th>\n";
2571                 }
2572                 if ($order eq "descr") {
2573                         @projects = sort {$a->{'descr'} cmp $b->{'descr'}} @projects;
2574                         print "<th>Description</th>\n";
2575                 } else {
2576                         print "<th>" .
2577                               $cgi->a({-href => href(project=>undef, order=>'descr'),
2578                                        -class => "header"}, "Description") .
2579                               "</th>\n";
2580                 }
2581                 if ($order eq "owner") {
2582                         @projects = sort {$a->{'owner'} cmp $b->{'owner'}} @projects;
2583                         print "<th>Owner</th>\n";
2584                 } else {
2585                         print "<th>" .
2586                               $cgi->a({-href => href(project=>undef, order=>'owner'),
2587                                        -class => "header"}, "Owner") .
2588                               "</th>\n";
2589                 }
2590                 if ($order eq "age") {
2591                         @projects = sort {$a->{'age'} <=> $b->{'age'}} @projects;
2592                         print "<th>Last Change</th>\n";
2593                 } else {
2594                         print "<th>" .
2595                               $cgi->a({-href => href(project=>undef, order=>'age'),
2596                                        -class => "header"}, "Last Change") .
2597                               "</th>\n";
2598                 }
2599                 print "<th></th>\n" .
2600                       "</tr>\n";
2601         }
2602         my $alternate = 1;
2603         for (my $i = $from; $i <= $to; $i++) {
2604                 my $pr = $projects[$i];
2605                 if ($alternate) {
2606                         print "<tr class=\"dark\">\n";
2607                 } else {
2608                         print "<tr class=\"light\">\n";
2609                 }
2610                 $alternate ^= 1;
2611                 if ($check_forks) {
2612                         print "<td>";
2613                         if ($pr->{'forks'}) {
2614                                 print "<!-- $pr->{'forks'} -->\n";
2615                                 print $cgi->a({-href => href(project=>$pr->{'path'}, action=>"forks")}, "+");
2616                         }
2617                         print "</td>\n";
2618                 }
2619                 print "<td>" . $cgi->a({-href => href(project=>$pr->{'path'}, action=>"summary"),
2620                                         -class => "list"}, esc_html($pr->{'path'})) . "</td>\n" .
2621                       "<td>" . $cgi->a({-href => href(project=>$pr->{'path'}, action=>"summary"),
2622                                         -class => "list", -title => $pr->{'descr_long'}},
2623                                         esc_html($pr->{'descr'})) . "</td>\n" .
2624                       "<td><i>" . chop_str($pr->{'owner'}, 15) . "</i></td>\n";
2625                 print "<td class=\"". age_class($pr->{'age'}) . "\">" .
2626                       $pr->{'age_string'} . "</td>\n" .
2627                       "<td class=\"link\">" .
2628                       $cgi->a({-href => href(project=>$pr->{'path'}, action=>"summary")}, "summary")   . " | " .
2629                       $cgi->a({-href => href(project=>$pr->{'path'}, action=>"shortlog")}, "shortlog") . " | " .
2630                       $cgi->a({-href => href(project=>$pr->{'path'}, action=>"log")}, "log") . " | " .
2631                       $cgi->a({-href => href(project=>$pr->{'path'}, action=>"tree")}, "tree") .
2632                       ($pr->{'forks'} ? " | " . $cgi->a({-href => href(project=>$pr->{'path'}, action=>"forks")}, "forks") : '') .
2633                       "</td>\n" .
2634                       "</tr>\n";
2635         }
2636         if (defined $extra) {
2637                 print "<tr>\n";
2638                 if ($check_forks) {
2639                         print "<td></td>\n";
2640                 }
2641                 print "<td colspan=\"5\">$extra</td>\n" .
2642                       "</tr>\n";
2643         }
2644         print "</table>\n";
2645 }
2646
2647 sub git_shortlog_body {
2648         # uses global variable $project
2649         my ($revlist, $from, $to, $refs, $extra) = @_;
2650
2651         my $have_snapshot = gitweb_have_snapshot();
2652
2653         $from = 0 unless defined $from;
2654         $to = $#{$revlist} if (!defined $to || $#{$revlist} < $to);
2655
2656         print "<table class=\"shortlog\" cellspacing=\"0\">\n";
2657         my $alternate = 1;
2658         for (my $i = $from; $i <= $to; $i++) {
2659                 my $commit = $revlist->[$i];
2660                 #my $ref = defined $refs ? format_ref_marker($refs, $commit) : '';
2661                 my $ref = format_ref_marker($refs, $commit);
2662                 my %co = parse_commit($commit);
2663                 if ($alternate) {
2664                         print "<tr class=\"dark\">\n";
2665                 } else {
2666                         print "<tr class=\"light\">\n";
2667                 }
2668                 $alternate ^= 1;
2669                 # git_summary() used print "<td><i>$co{'age_string'}</i></td>\n" .
2670                 print "<td title=\"$co{'age_string_age'}\"><i>$co{'age_string_date'}</i></td>\n" .
2671                       "<td><i>" . esc_html(chop_str($co{'author_name'}, 10)) . "</i></td>\n" .
2672                       "<td>";
2673                 print format_subject_html($co{'title'}, $co{'title_short'},
2674                                           href(action=>"commit", hash=>$commit), $ref);
2675                 print "</td>\n" .
2676                       "<td class=\"link\">" .
2677                       $cgi->a({-href => href(action=>"commit", hash=>$commit)}, "commit") . " | " .
2678                       $cgi->a({-href => href(action=>"commitdiff", hash=>$commit)}, "commitdiff") . " | " .
2679                       $cgi->a({-href => href(action=>"tree", hash=>$commit, hash_base=>$commit)}, "tree");
2680                 if ($have_snapshot) {
2681                         print " | " . $cgi->a({-href => href(action=>"snapshot", hash=>$commit)}, "snapshot");
2682                 }
2683                 print "</td>\n" .
2684                       "</tr>\n";
2685         }
2686         if (defined $extra) {
2687                 print "<tr>\n" .
2688                       "<td colspan=\"4\">$extra</td>\n" .
2689                       "</tr>\n";
2690         }
2691         print "</table>\n";
2692 }
2693
2694 sub git_history_body {
2695         # Warning: assumes constant type (blob or tree) during history
2696         my ($revlist, $from, $to, $refs, $hash_base, $ftype, $extra) = @_;
2697
2698         $from = 0 unless defined $from;
2699         $to = $#{$revlist} unless (defined $to && $to <= $#{$revlist});
2700
2701         print "<table class=\"history\" cellspacing=\"0\">\n";
2702         my $alternate = 1;
2703         for (my $i = $from; $i <= $to; $i++) {
2704                 if ($revlist->[$i] !~ m/^([0-9a-fA-F]{40})/) {
2705                         next;
2706                 }
2707
2708                 my $commit = $1;
2709                 my %co = parse_commit($commit);
2710                 if (!%co) {
2711                         next;
2712                 }
2713
2714                 my $ref = format_ref_marker($refs, $commit);
2715
2716                 if ($alternate) {
2717                         print "<tr class=\"dark\">\n";
2718                 } else {
2719                         print "<tr class=\"light\">\n";
2720                 }
2721                 $alternate ^= 1;
2722                 print "<td title=\"$co{'age_string_age'}\"><i>$co{'age_string_date'}</i></td>\n" .
2723                       # shortlog uses      chop_str($co{'author_name'}, 10)
2724                       "<td><i>" . esc_html(chop_str($co{'author_name'}, 15, 3)) . "</i></td>\n" .
2725                       "<td>";
2726                 # originally git_history used chop_str($co{'title'}, 50)
2727                 print format_subject_html($co{'title'}, $co{'title_short'},
2728                                           href(action=>"commit", hash=>$commit), $ref);
2729                 print "</td>\n" .
2730                       "<td class=\"link\">" .
2731                       $cgi->a({-href => href(action=>$ftype, hash_base=>$commit, file_name=>$file_name)}, $ftype) . " | " .
2732                       $cgi->a({-href => href(action=>"commitdiff", hash=>$commit)}, "commitdiff");
2733
2734                 if ($ftype eq 'blob') {
2735                         my $blob_current = git_get_hash_by_path($hash_base, $file_name);
2736                         my $blob_parent  = git_get_hash_by_path($commit, $file_name);
2737                         if (defined $blob_current && defined $blob_parent &&
2738                                         $blob_current ne $blob_parent) {
2739                                 print " | " .
2740                                         $cgi->a({-href => href(action=>"blobdiff",
2741                                                                hash=>$blob_current, hash_parent=>$blob_parent,
2742                                                                hash_base=>$hash_base, hash_parent_base=>$commit,
2743                                                                file_name=>$file_name)},
2744                                                 "diff to current");
2745                         }
2746                 }
2747                 print "</td>\n" .
2748                       "</tr>\n";
2749         }
2750         if (defined $extra) {
2751                 print "<tr>\n" .
2752                       "<td colspan=\"4\">$extra</td>\n" .
2753                       "</tr>\n";
2754         }
2755         print "</table>\n";
2756 }
2757
2758 sub git_tags_body {
2759         # uses global variable $project
2760         my ($taglist, $from, $to, $extra) = @_;
2761         $from = 0 unless defined $from;
2762         $to = $#{$taglist} if (!defined $to || $#{$taglist} < $to);
2763
2764         print "<table class=\"tags\" cellspacing=\"0\">\n";
2765         my $alternate = 1;
2766         for (my $i = $from; $i <= $to; $i++) {
2767                 my $entry = $taglist->[$i];
2768                 my %tag = %$entry;
2769                 my $comment = $tag{'subject'};
2770                 my $comment_short;
2771                 if (defined $comment) {
2772                         $comment_short = chop_str($comment, 30, 5);
2773                 }
2774                 if ($alternate) {
2775                         print "<tr class=\"dark\">\n";
2776                 } else {
2777                         print "<tr class=\"light\">\n";
2778                 }
2779                 $alternate ^= 1;
2780                 print "<td><i>$tag{'age'}</i></td>\n" .
2781                       "<td>" .
2782                       $cgi->a({-href => href(action=>$tag{'reftype'}, hash=>$tag{'refid'}),
2783                                -class => "list name"}, esc_html($tag{'name'})) .
2784                       "</td>\n" .
2785                       "<td>";
2786                 if (defined $comment) {
2787                         print format_subject_html($comment, $comment_short,
2788                                                   href(action=>"tag", hash=>$tag{'id'}));
2789                 }
2790                 print "</td>\n" .
2791                       "<td class=\"selflink\">";
2792                 if ($tag{'type'} eq "tag") {
2793                         print $cgi->a({-href => href(action=>"tag", hash=>$tag{'id'})}, "tag");
2794                 } else {
2795                         print "&nbsp;";
2796                 }
2797                 print "</td>\n" .
2798                       "<td class=\"link\">" . " | " .
2799                       $cgi->a({-href => href(action=>$tag{'reftype'}, hash=>$tag{'refid'})}, $tag{'reftype'});
2800                 if ($tag{'reftype'} eq "commit") {
2801                         print " | " . $cgi->a({-href => href(action=>"shortlog", hash=>$tag{'name'})}, "shortlog") .
2802                               " | " . $cgi->a({-href => href(action=>"log", hash=>$tag{'name'})}, "log");
2803                 } elsif ($tag{'reftype'} eq "blob") {
2804                         print " | " . $cgi->a({-href => href(action=>"blob_plain", hash=>$tag{'refid'})}, "raw");
2805                 }
2806                 print "</td>\n" .
2807                       "</tr>";
2808         }
2809         if (defined $extra) {
2810                 print "<tr>\n" .
2811                       "<td colspan=\"5\">$extra</td>\n" .
2812                       "</tr>\n";
2813         }
2814         print "</table>\n";
2815 }
2816
2817 sub git_heads_body {
2818         # uses global variable $project
2819         my ($headlist, $head, $from, $to, $extra) = @_;
2820         $from = 0 unless defined $from;
2821         $to = $#{$headlist} if (!defined $to || $#{$headlist} < $to);
2822
2823         print "<table class=\"heads\" cellspacing=\"0\">\n";
2824         my $alternate = 1;
2825         for (my $i = $from; $i <= $to; $i++) {
2826                 my $entry = $headlist->[$i];
2827                 my %ref = %$entry;
2828                 my $curr = $ref{'id'} eq $head;
2829                 if ($alternate) {
2830                         print "<tr class=\"dark\">\n";
2831                 } else {
2832                         print "<tr class=\"light\">\n";
2833                 }
2834                 $alternate ^= 1;
2835                 print "<td><i>$ref{'age'}</i></td>\n" .
2836                       ($curr ? "<td class=\"current_head\">" : "<td>") .
2837                       $cgi->a({-href => href(action=>"shortlog", hash=>$ref{'name'}),
2838                                -class => "list name"},esc_html($ref{'name'})) .
2839                       "</td>\n" .
2840                       "<td class=\"link\">" .
2841                       $cgi->a({-href => href(action=>"shortlog", hash=>$ref{'name'})}, "shortlog") . " | " .
2842                       $cgi->a({-href => href(action=>"log", hash=>$ref{'name'})}, "log") . " | " .
2843                       $cgi->a({-href => href(action=>"tree", hash=>$ref{'name'}, hash_base=>$ref{'name'})}, "tree") .
2844                       "</td>\n" .
2845                       "</tr>";
2846         }
2847         if (defined $extra) {
2848                 print "<tr>\n" .
2849                       "<td colspan=\"3\">$extra</td>\n" .
2850                       "</tr>\n";
2851         }
2852         print "</table>\n";
2853 }
2854
2855 sub git_search_grep_body {
2856         my ($greplist, $from, $to, $extra) = @_;
2857         $from = 0 unless defined $from;
2858         $to = $#{$greplist} if (!defined $to || $#{$greplist} < $to);
2859
2860         print "<table class=\"grep\" cellspacing=\"0\">\n";
2861         my $alternate = 1;
2862         for (my $i = $from; $i <= $to; $i++) {
2863                 my $commit = $greplist->[$i];
2864                 my %co = parse_commit($commit);
2865                 if (!%co) {
2866                         next;
2867                 }
2868                 if ($alternate) {
2869                         print "<tr class=\"dark\">\n";
2870                 } else {
2871                         print "<tr class=\"light\">\n";
2872                 }
2873                 $alternate ^= 1;
2874                 print "<td title=\"$co{'age_string_age'}\"><i>$co{'age_string_date'}</i></td>\n" .
2875                       "<td><i>" . esc_html(chop_str($co{'author_name'}, 15, 5)) . "</i></td>\n" .
2876                       "<td>" .
2877                       $cgi->a({-href => href(action=>"commit", hash=>$co{'id'}), -class => "list subject"},
2878                                esc_html(chop_str($co{'title'}, 50)) . "<br/>");
2879                 my $comment = $co{'comment'};
2880                 foreach my $line (@$comment) {
2881                         if ($line =~ m/^(.*)($searchtext)(.*)$/i) {
2882                                 my $lead = esc_html($1) || "";
2883                                 $lead = chop_str($lead, 30, 10);
2884                                 my $match = esc_html($2) || "";
2885                                 my $trail = esc_html($3) || "";
2886                                 $trail = chop_str($trail, 30, 10);
2887                                 my $text = "$lead<span class=\"match\">$match</span>$trail";
2888                                 print chop_str($text, 80, 5) . "<br/>\n";
2889                         }
2890                 }
2891                 print "</td>\n" .
2892                       "<td class=\"link\">" .
2893                       $cgi->a({-href => href(action=>"commit", hash=>$co{'id'})}, "commit") .
2894                       " | " .
2895                       $cgi->a({-href => href(action=>"tree", hash=>$co{'tree'}, hash_base=>$co{'id'})}, "tree");
2896                 print "</td>\n" .
2897                       "</tr>\n";
2898         }
2899         if (defined $extra) {
2900                 print "<tr>\n" .
2901                       "<td colspan=\"3\">$extra</td>\n" .
2902                       "</tr>\n";
2903         }
2904         print "</table>\n";
2905 }
2906
2907 ## ======================================================================
2908 ## ======================================================================
2909 ## actions
2910
2911 sub git_project_list {
2912         my $order = $cgi->param('o');
2913         if (defined $order && $order !~ m/project|descr|owner|age/) {
2914                 die_error(undef, "Unknown order parameter");
2915         }
2916
2917         my @list = git_get_projects_list();
2918         if (!@list) {
2919                 die_error(undef, "No projects found");
2920         }
2921
2922         git_header_html();
2923         if (-f $home_text) {
2924                 print "<div class=\"index_include\">\n";
2925                 open (my $fd, $home_text);
2926                 print <$fd>;
2927                 close $fd;
2928                 print "</div>\n";
2929         }
2930         git_project_list_body(\@list, $order);
2931         git_footer_html();
2932 }
2933
2934 sub git_forks {
2935         my $order = $cgi->param('o');
2936         if (defined $order && $order !~ m/project|descr|owner|age/) {
2937                 die_error(undef, "Unknown order parameter");
2938         }
2939
2940         my @list = git_get_projects_list($project);
2941         if (!@list) {
2942                 die_error(undef, "No forks found");
2943         }
2944
2945         git_header_html();
2946         git_print_page_nav('','');
2947         git_print_header_div('summary', "$project forks");
2948         git_project_list_body(\@list, $order);
2949         git_footer_html();
2950 }
2951
2952 sub git_project_index {
2953         my @projects = git_get_projects_list($project);
2954
2955         print $cgi->header(
2956                 -type => 'text/plain',
2957                 -charset => 'utf-8',
2958                 -content_disposition => 'inline; filename="index.aux"');
2959
2960         foreach my $pr (@projects) {
2961                 if (!exists $pr->{'owner'}) {
2962                         $pr->{'owner'} = get_file_owner("$projectroot/$project");
2963                 }
2964
2965                 my ($path, $owner) = ($pr->{'path'}, $pr->{'owner'});
2966                 # quote as in CGI::Util::encode, but keep the slash, and use '+' for ' '
2967                 $path  =~ s/([^a-zA-Z0-9_.\-\/ ])/sprintf("%%%02X", ord($1))/eg;
2968                 $owner =~ s/([^a-zA-Z0-9_.\-\/ ])/sprintf("%%%02X", ord($1))/eg;
2969                 $path  =~ s/ /\+/g;
2970                 $owner =~ s/ /\+/g;
2971
2972                 print "$path $owner\n";
2973         }
2974 }
2975
2976 sub git_summary {
2977         my $descr = git_get_project_description($project) || "none";
2978         my %co = parse_commit("HEAD");
2979         my %cd = parse_date($co{'committer_epoch'}, $co{'committer_tz'});
2980         my $head = $co{'id'};
2981
2982         my $owner = git_get_project_owner($project);
2983
2984         my $refs = git_get_references();
2985         # These get_*_list functions return one more to allow us to see if
2986         # there are more ...
2987         my @taglist  = git_get_tags_list(16);
2988         my @headlist = git_get_heads_list(16);
2989         my @forklist;
2990         my ($check_forks) = gitweb_check_feature('forks');
2991
2992         if ($check_forks) {
2993                 @forklist = git_get_projects_list($project);
2994         }
2995
2996         git_header_html();
2997         git_print_page_nav('summary','', $head);
2998
2999         print "<div class=\"title\">&nbsp;</div>\n";
3000         print "<table cellspacing=\"0\">\n" .
3001               "<tr><td>description</td><td>" . esc_html($descr) . "</td></tr>\n" .
3002               "<tr><td>owner</td><td>$owner</td></tr>\n" .
3003               "<tr><td>last change</td><td>$cd{'rfc2822'}</td></tr>\n";
3004         # use per project git URL list in $projectroot/$project/cloneurl
3005         # or make project git URL from git base URL and project name
3006         my $url_tag = "URL";
3007         my @url_list = git_get_project_url_list($project);
3008         @url_list = map { "$_/$project" } @git_base_url_list unless @url_list;
3009         foreach my $git_url (@url_list) {
3010                 next unless $git_url;
3011                 print "<tr><td>$url_tag</td><td>$git_url</td></tr>\n";
3012                 $url_tag = "";
3013         }
3014         print "</table>\n";
3015
3016         if (-s "$projectroot/$project/README.html") {
3017                 if (open my $fd, "$projectroot/$project/README.html") {
3018                         print "<div class=\"title\">readme</div>\n";
3019                         print $_ while (<$fd>);
3020                         close $fd;
3021                 }
3022         }
3023
3024         # we need to request one more than 16 (0..15) to check if
3025         # those 16 are all
3026         open my $fd, "-|", git_cmd(), "rev-list", "--max-count=17",
3027                 $head, "--"
3028                 or die_error(undef, "Open git-rev-list failed");
3029         my @revlist = map { chomp; $_ } <$fd>;
3030         close $fd;
3031         git_print_header_div('shortlog');
3032         git_shortlog_body(\@revlist, 0, 15, $refs,
3033                           $#revlist <=  15 ? undef :
3034                           $cgi->a({-href => href(action=>"shortlog")}, "..."));
3035
3036         if (@taglist) {
3037                 git_print_header_div('tags');
3038                 git_tags_body(\@taglist, 0, 15,
3039                               $#taglist <=  15 ? undef :
3040                               $cgi->a({-href => href(action=>"tags")}, "..."));
3041         }
3042
3043         if (@headlist) {
3044                 git_print_header_div('heads');
3045                 git_heads_body(\@headlist, $head, 0, 15,
3046                                $#headlist <= 15 ? undef :
3047                                $cgi->a({-href => href(action=>"heads")}, "..."));
3048         }
3049
3050         if (@forklist) {
3051                 git_print_header_div('forks');
3052                 git_project_list_body(\@forklist, undef, 0, 15,
3053                                       $#forklist <= 15 ? undef :
3054                                       $cgi->a({-href => href(action=>"forks")}, "..."),
3055                                       'noheader');
3056         }
3057
3058         git_footer_html();
3059 }
3060
3061 sub git_tag {
3062         my $head = git_get_head_hash($project);
3063         git_header_html();
3064         git_print_page_nav('','', $head,undef,$head);
3065         my %tag = parse_tag($hash);
3066         git_print_header_div('commit', esc_html($tag{'name'}), $hash);
3067         print "<div class=\"title_text\">\n" .
3068               "<table cellspacing=\"0\">\n" .
3069               "<tr>\n" .
3070               "<td>object</td>\n" .
3071               "<td>" . $cgi->a({-class => "list", -href => href(action=>$tag{'type'}, hash=>$tag{'object'})},
3072                                $tag{'object'}) . "</td>\n" .
3073               "<td class=\"link\">" . $cgi->a({-href => href(action=>$tag{'type'}, hash=>$tag{'object'})},
3074                                               $tag{'type'}) . "</td>\n" .
3075               "</tr>\n";
3076         if (defined($tag{'author'})) {
3077                 my %ad = parse_date($tag{'epoch'}, $tag{'tz'});
3078                 print "<tr><td>author</td><td>" . esc_html($tag{'author'}) . "</td></tr>\n";
3079                 print "<tr><td></td><td>" . $ad{'rfc2822'} .
3080                         sprintf(" (%02d:%02d %s)", $ad{'hour_local'}, $ad{'minute_local'}, $ad{'tz_local'}) .
3081                         "</td></tr>\n";
3082         }
3083         print "</table>\n\n" .
3084               "</div>\n";
3085         print "<div class=\"page_body\">";
3086         my $comment = $tag{'comment'};
3087         foreach my $line (@$comment) {
3088                 chomp $line;
3089                 print esc_html($line, -nbsp=>1) . "<br/>\n";
3090         }
3091         print "</div>\n";
3092         git_footer_html();
3093 }
3094
3095 sub git_blame2 {
3096         my $fd;
3097         my $ftype;
3098
3099         my ($have_blame) = gitweb_check_feature('blame');
3100         if (!$have_blame) {
3101                 die_error('403 Permission denied', "Permission denied");
3102         }
3103         die_error('404 Not Found', "File name not defined") if (!$file_name);
3104         $hash_base ||= git_get_head_hash($project);
3105         die_error(undef, "Couldn't find base commit") unless ($hash_base);
3106         my %co = parse_commit($hash_base)
3107                 or die_error(undef, "Reading commit failed");
3108         if (!defined $hash) {
3109                 $hash = git_get_hash_by_path($hash_base, $file_name, "blob")
3110                         or die_error(undef, "Error looking up file");
3111         }
3112         $ftype = git_get_type($hash);
3113         if ($ftype !~ "blob") {
3114                 die_error("400 Bad Request", "Object is not a blob");
3115         }
3116         open ($fd, "-|", git_cmd(), "blame", '-p', '--',
3117               $file_name, $hash_base)
3118                 or die_error(undef, "Open git-blame failed");
3119         git_header_html();
3120         my $formats_nav =
3121                 $cgi->a({-href => href(action=>"blob", hash=>$hash, hash_base=>$hash_base, file_name=>$file_name)},
3122                         "blob") .
3123                 " | " .
3124                 $cgi->a({-href => href(action=>"history", hash=>$hash, hash_base=>$hash_base, file_name=>$file_name)},
3125                         "history") .
3126                 " | " .
3127                 $cgi->a({-href => href(action=>"blame", file_name=>$file_name)},
3128                         "HEAD");
3129         git_print_page_nav('','', $hash_base,$co{'tree'},$hash_base, $formats_nav);
3130         git_print_header_div('commit', esc_html($co{'title'}), $hash_base);
3131         git_print_page_path($file_name, $ftype, $hash_base);
3132         my @rev_color = (qw(light2 dark2));
3133         my $num_colors = scalar(@rev_color);
3134         my $current_color = 0;
3135         my $last_rev;
3136         print <<HTML;
3137 <div class="page_body">
3138 <table class="blame">
3139 <tr><th>Commit</th><th>Line</th><th>Data</th></tr>
3140 HTML
3141         my %metainfo = ();
3142         while (1) {
3143                 $_ = <$fd>;
3144                 last unless defined $_;
3145                 my ($full_rev, $orig_lineno, $lineno, $group_size) =
3146                     /^([0-9a-f]{40}) (\d+) (\d+)(?: (\d+))?$/;
3147                 if (!exists $metainfo{$full_rev}) {
3148                         $metainfo{$full_rev} = {};
3149                 }
3150                 my $meta = $metainfo{$full_rev};
3151                 while (<$fd>) {
3152                         last if (s/^\t//);
3153                         if (/^(\S+) (.*)$/) {
3154                                 $meta->{$1} = $2;
3155                         }
3156                 }
3157                 my $data = $_;
3158                 chomp $data;
3159                 my $rev = substr($full_rev, 0, 8);
3160                 my $author = $meta->{'author'};
3161                 my %date = parse_date($meta->{'author-time'},
3162                                       $meta->{'author-tz'});
3163                 my $date = $date{'iso-tz'};
3164                 if ($group_size) {
3165                         $current_color = ++$current_color % $num_colors;
3166                 }
3167                 print "<tr class=\"$rev_color[$current_color]\">\n";
3168                 if ($group_size) {
3169                         print "<td class=\"sha1\"";
3170                         print " title=\"". esc_html($author) . ", $date\"";
3171                         print " rowspan=\"$group_size\"" if ($group_size > 1);
3172                         print ">";
3173                         print $cgi->a({-href => href(action=>"commit",
3174                                                      hash=>$full_rev,
3175                                                      file_name=>$file_name)},
3176                                       esc_html($rev));
3177                         print "</td>\n";
3178                 }
3179                 my $blamed = href(action => 'blame',
3180                                   file_name => $meta->{'filename'},
3181                                   hash_base => $full_rev);
3182                 print "<td class=\"linenr\">";
3183                 print $cgi->a({ -href => "$blamed#l$orig_lineno",
3184                                 -id => "l$lineno",
3185                                 -class => "linenr" },
3186                               esc_html($lineno));
3187                 print "</td>";
3188                 print "<td class=\"pre\">" . esc_html($data) . "</td>\n";
3189                 print "</tr>\n";
3190         }
3191         print "</table>\n";
3192         print "</div>";
3193         close $fd
3194                 or print "Reading blob failed\n";
3195         git_footer_html();
3196 }
3197
3198 sub git_blame {
3199         my $fd;
3200
3201         my ($have_blame) = gitweb_check_feature('blame');
3202         if (!$have_blame) {
3203                 die_error('403 Permission denied', "Permission denied");
3204         }
3205         die_error('404 Not Found', "File name not defined") if (!$file_name);
3206         $hash_base ||= git_get_head_hash($project);
3207         die_error(undef, "Couldn't find base commit") unless ($hash_base);
3208         my %co = parse_commit($hash_base)
3209                 or die_error(undef, "Reading commit failed");
3210         if (!defined $hash) {
3211                 $hash = git_get_hash_by_path($hash_base, $file_name, "blob")
3212                         or die_error(undef, "Error lookup file");
3213         }
3214         open ($fd, "-|", git_cmd(), "annotate", '-l', '-t', '-r', $file_name, $hash_base)
3215                 or die_error(undef, "Open git-annotate failed");
3216         git_header_html();
3217         my $formats_nav =
3218                 $cgi->a({-href => href(action=>"blob", hash=>$hash, hash_base=>$hash_base, file_name=>$file_name)},
3219                         "blob") .
3220                 " | " .
3221                 $cgi->a({-href => href(action=>"history", hash=>$hash, hash_base=>$hash_base, file_name=>$file_name)},
3222                         "history") .
3223                 " | " .
3224                 $cgi->a({-href => href(action=>"blame", file_name=>$file_name)},
3225                         "HEAD");
3226         git_print_page_nav('','', $hash_base,$co{'tree'},$hash_base, $formats_nav);
3227         git_print_header_div('commit', esc_html($co{'title'}), $hash_base);
3228         git_print_page_path($file_name, 'blob', $hash_base);
3229         print "<div class=\"page_body\">\n";
3230         print <<HTML;
3231 <table class="blame">
3232   <tr>
3233     <th>Commit</th>
3234     <th>Age</th>
3235     <th>Author</th>
3236     <th>Line</th>
3237     <th>Data</th>
3238   </tr>
3239 HTML
3240         my @line_class = (qw(light dark));
3241         my $line_class_len = scalar (@line_class);
3242         my $line_class_num = $#line_class;
3243         while (my $line = <$fd>) {
3244                 my $long_rev;
3245                 my $short_rev;
3246                 my $author;
3247                 my $time;
3248                 my $lineno;
3249                 my $data;
3250                 my $age;
3251                 my $age_str;
3252                 my $age_class;
3253
3254                 chomp $line;
3255                 $line_class_num = ($line_class_num + 1) % $line_class_len;
3256
3257                 if ($line =~ m/^([0-9a-fA-F]{40})\t\(\s*([^\t]+)\t(\d+) [+-]\d\d\d\d\t(\d+)\)(.*)$/) {
3258                         $long_rev = $1;
3259                         $author   = $2;
3260                         $time     = $3;
3261                         $lineno   = $4;
3262                         $data     = $5;
3263                 } else {
3264                         print qq(  <tr><td colspan="5" class="error">Unable to parse: $line</td></tr>\n);
3265                         next;
3266                 }
3267                 $short_rev  = substr ($long_rev, 0, 8);
3268                 $age        = time () - $time;
3269                 $age_str    = age_string ($age);
3270                 $age_str    =~ s/ /&nbsp;/g;
3271                 $age_class  = age_class($age);
3272                 $author     = esc_html ($author);
3273                 $author     =~ s/ /&nbsp;/g;
3274
3275                 $data = untabify($data);
3276                 $data = esc_html ($data);
3277
3278                 print <<HTML;
3279   <tr class="$line_class[$line_class_num]">
3280     <td class="sha1"><a href="${\href (action=>"commit", hash=>$long_rev)}" class="text">$short_rev..</a></td>
3281     <td class="$age_class">$age_str</td>
3282     <td>$author</td>
3283     <td class="linenr"><a id="$lineno" href="#$lineno" class="linenr">$lineno</a></td>
3284     <td class="pre">$data</td>
3285   </tr>
3286 HTML
3287         } # while (my $line = <$fd>)
3288         print "</table>\n\n";
3289         close $fd
3290                 or print "Reading blob failed.\n";
3291         print "</div>";
3292         git_footer_html();
3293 }
3294
3295 sub git_tags {
3296         my $head = git_get_head_hash($project);
3297         git_header_html();
3298         git_print_page_nav('','', $head,undef,$head);
3299         git_print_header_div('summary', $project);
3300
3301         my @tagslist = git_get_tags_list();
3302         if (@tagslist) {
3303                 git_tags_body(\@tagslist);
3304         }
3305         git_footer_html();
3306 }
3307
3308 sub git_heads {
3309         my $head = git_get_head_hash($project);
3310         git_header_html();
3311         git_print_page_nav('','', $head,undef,$head);
3312         git_print_header_div('summary', $project);
3313
3314         my @headslist = git_get_heads_list();
3315         if (@headslist) {
3316                 git_heads_body(\@headslist, $head);
3317         }
3318         git_footer_html();
3319 }
3320
3321 sub git_blob_plain {
3322         my $expires;
3323
3324         if (!defined $hash) {
3325                 if (defined $file_name) {
3326                         my $base = $hash_base || git_get_head_hash($project);
3327                         $hash = git_get_hash_by_path($base, $file_name, "blob")
3328                                 or die_error(undef, "Error lookup file");
3329                 } else {
3330                         die_error(undef, "No file name defined");
3331                 }
3332         } elsif ($hash =~ m/^[0-9a-fA-F]{40}$/) {
3333                 # blobs defined by non-textual hash id's can be cached
3334                 $expires = "+1d";
3335         }
3336
3337         my $type = shift;
3338         open my $fd, "-|", git_cmd(), "cat-file", "blob", $hash
3339                 or die_error(undef, "Couldn't cat $file_name, $hash");
3340
3341         $type ||= blob_mimetype($fd, $file_name);
3342
3343         # save as filename, even when no $file_name is given
3344         my $save_as = "$hash";
3345         if (defined $file_name) {
3346                 $save_as = $file_name;
3347         } elsif ($type =~ m/^text\//) {
3348                 $save_as .= '.txt';
3349         }
3350
3351         print $cgi->header(
3352                 -type => "$type",
3353                 -expires=>$expires,
3354                 -content_disposition => 'inline; filename="' . "$save_as" . '"');
3355         undef $/;
3356         binmode STDOUT, ':raw';
3357         print <$fd>;
3358         binmode STDOUT, ':utf8'; # as set at the beginning of gitweb.cgi
3359         $/ = "\n";
3360         close $fd;
3361 }
3362
3363 sub git_blob {
3364         my $expires;
3365
3366         if (!defined $hash) {
3367                 if (defined $file_name) {
3368                         my $base = $hash_base || git_get_head_hash($project);
3369                         $hash = git_get_hash_by_path($base, $file_name, "blob")
3370                                 or die_error(undef, "Error lookup file");
3371                 } else {
3372                         die_error(undef, "No file name defined");
3373                 }
3374         } elsif ($hash =~ m/^[0-9a-fA-F]{40}$/) {
3375                 # blobs defined by non-textual hash id's can be cached
3376                 $expires = "+1d";
3377         }
3378
3379         my ($have_blame) = gitweb_check_feature('blame');
3380         open my $fd, "-|", git_cmd(), "cat-file", "blob", $hash
3381                 or die_error(undef, "Couldn't cat $file_name, $hash");
3382         my $mimetype = blob_mimetype($fd, $file_name);
3383         if ($mimetype !~ m!^(?:text/|image/(?:gif|png|jpeg)$)!) {
3384                 close $fd;
3385                 return git_blob_plain($mimetype);
3386         }
3387         # we can have blame only for text/* mimetype
3388         $have_blame &&= ($mimetype =~ m!^text/!);
3389
3390         git_header_html(undef, $expires);
3391         my $formats_nav = '';
3392         if (defined $hash_base && (my %co = parse_commit($hash_base))) {
3393                 if (defined $file_name) {
3394                         if ($have_blame) {
3395                                 $formats_nav .=
3396                                         $cgi->a({-href => href(action=>"blame", hash_base=>$hash_base,
3397                                                                hash=>$hash, file_name=>$file_name)},
3398                                                 "blame") .
3399                                         " | ";
3400                         }
3401                         $formats_nav .=
3402                                 $cgi->a({-href => href(action=>"history", hash_base=>$hash_base,
3403                                                        hash=>$hash, file_name=>$file_name)},
3404                                         "history") .
3405                                 " | " .
3406                                 $cgi->a({-href => href(action=>"blob_plain",
3407                                                        hash=>$hash, file_name=>$file_name)},
3408                                         "raw") .
3409                                 " | " .
3410                                 $cgi->a({-href => href(action=>"blob",
3411                                                        hash_base=>"HEAD", file_name=>$file_name)},
3412                                         "HEAD");
3413                 } else {
3414                         $formats_nav .=
3415                                 $cgi->a({-href => href(action=>"blob_plain", hash=>$hash)}, "raw");
3416                 }
3417                 git_print_page_nav('','', $hash_base,$co{'tree'},$hash_base, $formats_nav);
3418                 git_print_header_div('commit', esc_html($co{'title'}), $hash_base);
3419         } else {
3420                 print "<div class=\"page_nav\">\n" .
3421                       "<br/><br/></div>\n" .
3422                       "<div class=\"title\">$hash</div>\n";
3423         }
3424         git_print_page_path($file_name, "blob", $hash_base);
3425         print "<div class=\"page_body\">\n";
3426         if ($mimetype =~ m!^text/!) {
3427                 my $nr;
3428                 while (my $line = <$fd>) {
3429                         chomp $line;
3430                         $nr++;
3431                         $line = untabify($line);
3432                         printf "<div class=\"pre\"><a id=\"l%i\" href=\"#l%i\" class=\"linenr\">%4i</a> %s</div>\n",
3433                                $nr, $nr, $nr, esc_html($line, -nbsp=>1);
3434                 }
3435         } elsif ($mimetype =~ m!^image/!) {
3436                 print qq!<img type="$mimetype"!;
3437                 if ($file_name) {
3438                         print qq! alt="$file_name" title="$file_name"!;
3439                 }
3440                 print qq! src="! .
3441                       href(action=>"blob_plain", hash=>$hash,
3442                            hash_base=>$hash_base, file_name=>$file_name) .
3443                       qq!" />\n!;
3444         }
3445         close $fd
3446                 or print "Reading blob failed.\n";
3447         print "</div>";
3448         git_footer_html();
3449 }
3450
3451 sub git_tree {
3452         my $have_snapshot = gitweb_have_snapshot();
3453
3454         if (!defined $hash_base) {
3455                 $hash_base = "HEAD";
3456         }
3457         if (!defined $hash) {
3458                 if (defined $file_name) {
3459                         $hash = git_get_hash_by_path($hash_base, $file_name, "tree");
3460                 } else {
3461                         $hash = $hash_base;
3462                 }
3463         }
3464         $/ = "\0";
3465         open my $fd, "-|", git_cmd(), "ls-tree", '-z', $hash
3466                 or die_error(undef, "Open git-ls-tree failed");
3467         my @entries = map { chomp; $_ } <$fd>;
3468         close $fd or die_error(undef, "Reading tree failed");
3469         $/ = "\n";
3470
3471         my $refs = git_get_references();
3472         my $ref = format_ref_marker($refs, $hash_base);
3473         git_header_html();
3474         my $basedir = '';
3475         my ($have_blame) = gitweb_check_feature('blame');
3476         if (defined $hash_base && (my %co = parse_commit($hash_base))) {
3477                 my @views_nav = ();
3478                 if (defined $file_name) {
3479                         push @views_nav,
3480                                 $cgi->a({-href => href(action=>"history", hash_base=>$hash_base,
3481                                                        hash=>$hash, file_name=>$file_name)},
3482                                         "history"),
3483                                 $cgi->a({-href => href(action=>"tree",
3484                                                        hash_base=>"HEAD", file_name=>$file_name)},
3485                                         "HEAD"),
3486                 }
3487                 if ($have_snapshot) {
3488                         # FIXME: Should be available when we have no hash base as well.
3489                         push @views_nav,
3490                                 $cgi->a({-href => href(action=>"snapshot", hash=>$hash)},
3491                                         "snapshot");
3492                 }
3493                 git_print_page_nav('tree','', $hash_base, undef, undef, join(' | ', @views_nav));
3494                 git_print_header_div('commit', esc_html($co{'title'}) . $ref, $hash_base);
3495         } else {
3496                 undef $hash_base;
3497                 print "<div class=\"page_nav\">\n";
3498                 print "<br/><br/></div>\n";
3499                 print "<div class=\"title\">$hash</div>\n";
3500         }
3501         if (defined $file_name) {
3502                 $basedir = $file_name;
3503                 if ($basedir ne '' && substr($basedir, -1) ne '/') {
3504                         $basedir .= '/';
3505                 }
3506         }
3507         git_print_page_path($file_name, 'tree', $hash_base);
3508         print "<div class=\"page_body\">\n";
3509         print "<table cellspacing=\"0\">\n";
3510         my $alternate = 1;
3511         # '..' (top directory) link if possible
3512         if (defined $hash_base &&
3513             defined $file_name && $file_name =~ m![^/]+$!) {
3514                 if ($alternate) {
3515                         print "<tr class=\"dark\">\n";
3516                 } else {
3517                         print "<tr class=\"light\">\n";
3518                 }
3519                 $alternate ^= 1;
3520
3521                 my $up = $file_name;
3522                 $up =~ s!/?[^/]+$!!;
3523                 undef $up unless $up;
3524                 # based on git_print_tree_entry
3525                 print '<td class="mode">' . mode_str('040000') . "</td>\n";
3526                 print '<td class="list">';
3527                 print $cgi->a({-href => href(action=>"tree", hash_base=>$hash_base,
3528                                              file_name=>$up)},
3529                               "..");
3530                 print "</td>\n";
3531                 print "<td class=\"link\"></td>\n";
3532
3533                 print "</tr>\n";
3534         }
3535         foreach my $line (@entries) {
3536                 my %t = parse_ls_tree_line($line, -z => 1);
3537
3538                 if ($alternate) {
3539                         print "<tr class=\"dark\">\n";
3540                 } else {
3541                         print "<tr class=\"light\">\n";
3542                 }
3543                 $alternate ^= 1;
3544
3545                 git_print_tree_entry(\%t, $basedir, $hash_base, $have_blame);
3546
3547                 print "</tr>\n";
3548         }
3549         print "</table>\n" .
3550               "</div>";
3551         git_footer_html();
3552 }
3553
3554 sub git_snapshot {
3555         my ($ctype, $suffix, $command) = gitweb_check_feature('snapshot');
3556         my $have_snapshot = (defined $ctype && defined $suffix);
3557         if (!$have_snapshot) {
3558                 die_error('403 Permission denied', "Permission denied");
3559         }
3560
3561         if (!defined $hash) {
3562                 $hash = git_get_head_hash($project);
3563         }
3564
3565         my $filename = basename($project) . "-$hash.tar.$suffix";
3566
3567         print $cgi->header(
3568                 -type => "application/$ctype",
3569                 -content_disposition => 'inline; filename="' . "$filename" . '"',
3570                 -status => '200 OK');
3571
3572         my $git = git_cmd_str();
3573         my $name = $project;
3574         $name =~ s/\047/\047\\\047\047/g;
3575         open my $fd, "-|",
3576         "$git archive --format=tar --prefix=\'$name\'/ $hash | $command"
3577                 or die_error(undef, "Execute git-tar-tree failed.");
3578         binmode STDOUT, ':raw';
3579         print <$fd>;
3580         binmode STDOUT, ':utf8'; # as set at the beginning of gitweb.cgi
3581         close $fd;
3582
3583 }
3584
3585 sub git_log {
3586         my $head = git_get_head_hash($project);
3587         if (!defined $hash) {
3588                 $hash = $head;
3589         }
3590         if (!defined $page) {
3591                 $page = 0;
3592         }
3593         my $refs = git_get_references();
3594
3595         my $limit = sprintf("--max-count=%i", (100 * ($page+1)));
3596         open my $fd, "-|", git_cmd(), "rev-list", $limit, $hash, "--"
3597                 or die_error(undef, "Open git-rev-list failed");
3598         my @revlist = map { chomp; $_ } <$fd>;
3599         close $fd;
3600
3601         my $paging_nav = format_paging_nav('log', $hash, $head, $page, $#revlist);
3602
3603         git_header_html();
3604         git_print_page_nav('log','', $hash,undef,undef, $paging_nav);
3605
3606         if (!@revlist) {
3607                 my %co = parse_commit($hash);
3608
3609                 git_print_header_div('summary', $project);
3610                 print "<div class=\"page_body\"> Last change $co{'age_string'}.<br/><br/></div>\n";
3611         }
3612         for (my $i = ($page * 100); $i <= $#revlist; $i++) {
3613                 my $commit = $revlist[$i];
3614                 my $ref = format_ref_marker($refs, $commit);
3615                 my %co = parse_commit($commit);
3616                 next if !%co;
3617                 my %ad = parse_date($co{'author_epoch'});
3618                 git_print_header_div('commit',
3619                                "<span class=\"age\">$co{'age_string'}</span>" .
3620                                esc_html($co{'title'}) . $ref,
3621                                $commit);
3622                 print "<div class=\"title_text\">\n" .
3623                       "<div class=\"log_link\">\n" .
3624                       $cgi->a({-href => href(action=>"commit", hash=>$commit)}, "commit") .
3625                       " | " .
3626                       $cgi->a({-href => href(action=>"commitdiff", hash=>$commit)}, "commitdiff") .
3627                       " | " .
3628                       $cgi->a({-href => href(action=>"tree", hash=>$commit, hash_base=>$commit)}, "tree") .
3629                       "<br/>\n" .
3630                       "</div>\n" .
3631                       "<i>" . esc_html($co{'author_name'}) .  " [$ad{'rfc2822'}]</i><br/>\n" .
3632                       "</div>\n";
3633
3634                 print "<div class=\"log_body\">\n";
3635                 git_print_log($co{'comment'}, -final_empty_line=> 1);
3636                 print "</div>\n";
3637         }
3638         git_footer_html();
3639 }
3640
3641 sub git_commit {
3642         $hash ||= $hash_base || "HEAD";
3643         my %co = parse_commit($hash);
3644         if (!%co) {
3645                 die_error(undef, "Unknown commit object");
3646         }
3647         my %ad = parse_date($co{'author_epoch'}, $co{'author_tz'});
3648         my %cd = parse_date($co{'committer_epoch'}, $co{'committer_tz'});
3649
3650         my $parent  = $co{'parent'};
3651         my $parents = $co{'parents'}; # listref
3652
3653         # we need to prepare $formats_nav before any parameter munging
3654         my $formats_nav;
3655         if (!defined $parent) {
3656                 # --root commitdiff
3657                 $formats_nav .= '(initial)';
3658         } elsif (@$parents == 1) {
3659                 # single parent commit
3660                 $formats_nav .=
3661                         '(parent: ' .
3662                         $cgi->a({-href => href(action=>"commit",
3663                                                hash=>$parent)},
3664                                 esc_html(substr($parent, 0, 7))) .
3665                         ')';
3666         } else {
3667                 # merge commit
3668                 $formats_nav .=
3669                         '(merge: ' .
3670                         join(' ', map {
3671                                 $cgi->a({-href => href(action=>"commitdiff",
3672                                                        hash=>$_)},
3673                                         esc_html(substr($_, 0, 7)));
3674                         } @$parents ) .
3675                         ')';
3676         }
3677
3678         if (!defined $parent) {
3679                 $parent = "--root";
3680         }
3681         my @difftree;
3682         if (@$parents <= 1) {
3683                 # difftree output is not printed for merges
3684                 open my $fd, "-|", git_cmd(), "diff-tree", '-r', "--no-commit-id",
3685                         @diff_opts, $parent, $hash, "--"
3686                                 or die_error(undef, "Open git-diff-tree failed");
3687                 @difftree = map { chomp; $_ } <$fd>;
3688                 close $fd or die_error(undef, "Reading git-diff-tree failed");
3689         }
3690
3691         # non-textual hash id's can be cached
3692         my $expires;
3693         if ($hash =~ m/^[0-9a-fA-F]{40}$/) {
3694                 $expires = "+1d";
3695         }
3696         my $refs = git_get_references();
3697         my $ref = format_ref_marker($refs, $co{'id'});
3698
3699         my $have_snapshot = gitweb_have_snapshot();
3700
3701         git_header_html(undef, $expires);
3702         git_print_page_nav('commit', '',
3703                            $hash, $co{'tree'}, $hash,
3704                            $formats_nav);
3705
3706         if (defined $co{'parent'}) {
3707                 git_print_header_div('commitdiff', esc_html($co{'title'}) . $ref, $hash);
3708         } else {
3709                 git_print_header_div('tree', esc_html($co{'title'}) . $ref, $co{'tree'}, $hash);
3710         }
3711         print "<div class=\"title_text\">\n" .
3712               "<table cellspacing=\"0\">\n";
3713         print "<tr><td>author</td><td>" . esc_html($co{'author'}) . "</td></tr>\n".
3714               "<tr>" .
3715               "<td></td><td> $ad{'rfc2822'}";
3716         if ($ad{'hour_local'} < 6) {
3717                 printf(" (<span class=\"atnight\">%02d:%02d</span> %s)",
3718                        $ad{'hour_local'}, $ad{'minute_local'}, $ad{'tz_local'});
3719         } else {
3720                 printf(" (%02d:%02d %s)",
3721                        $ad{'hour_local'}, $ad{'minute_local'}, $ad{'tz_local'});
3722         }
3723         print "</td>" .
3724               "</tr>\n";
3725         print "<tr><td>committer</td><td>" . esc_html($co{'committer'}) . "</td></tr>\n";
3726         print "<tr><td></td><td> $cd{'rfc2822'}" .
3727               sprintf(" (%02d:%02d %s)", $cd{'hour_local'}, $cd{'minute_local'}, $cd{'tz_local'}) .
3728               "</td></tr>\n";
3729         print "<tr><td>commit</td><td class=\"sha1\">$co{'id'}</td></tr>\n";
3730         print "<tr>" .
3731               "<td>tree</td>" .
3732               "<td class=\"sha1\">" .
3733               $cgi->a({-href => href(action=>"tree", hash=>$co{'tree'}, hash_base=>$hash),
3734                        class => "list"}, $co{'tree'}) .
3735               "</td>" .
3736               "<td class=\"link\">" .
3737               $cgi->a({-href => href(action=>"tree", hash=>$co{'tree'}, hash_base=>$hash)},
3738                       "tree");
3739         if ($have_snapshot) {
3740                 print " | " .
3741                       $cgi->a({-href => href(action=>"snapshot", hash=>$hash)}, "snapshot");
3742         }
3743         print "</td>" .
3744               "</tr>\n";
3745
3746         foreach my $par (@$parents) {
3747                 print "<tr>" .
3748                       "<td>parent</td>" .
3749                       "<td class=\"sha1\">" .
3750                       $cgi->a({-href => href(action=>"commit", hash=>$par),
3751                                class => "list"}, $par) .
3752                       "</td>" .
3753                       "<td class=\"link\">" .
3754                       $cgi->a({-href => href(action=>"commit", hash=>$par)}, "commit") .
3755                       " | " .
3756                       $cgi->a({-href => href(action=>"commitdiff", hash=>$hash, hash_parent=>$par)}, "diff") .
3757                       "</td>" .
3758                       "</tr>\n";
3759         }
3760         print "</table>".
3761               "</div>\n";
3762
3763         print "<div class=\"page_body\">\n";
3764         git_print_log($co{'comment'});
3765         print "</div>\n";
3766
3767         if (@$parents <= 1) {
3768                 # do not output difftree/whatchanged for merges
3769                 git_difftree_body(\@difftree, $hash, $parent);
3770         }
3771
3772         git_footer_html();
3773 }
3774
3775 sub git_object {
3776         # object is defined by:
3777         # - hash or hash_base alone
3778         # - hash_base and file_name
3779         my $type;
3780
3781         # - hash or hash_base alone
3782         if ($hash || ($hash_base && !defined $file_name)) {
3783                 my $object_id = $hash || $hash_base;
3784
3785                 my $git_command = git_cmd_str();
3786                 open my $fd, "-|", "$git_command cat-file -t $object_id 2>/dev/null"
3787                         or die_error('404 Not Found', "Object does not exist");
3788                 $type = <$fd>;
3789                 chomp $type;
3790                 close $fd
3791                         or die_error('404 Not Found', "Object does not exist");
3792
3793         # - hash_base and file_name
3794         } elsif ($hash_base && defined $file_name) {
3795                 $file_name =~ s,/+$,,;
3796
3797                 system(git_cmd(), "cat-file", '-e', $hash_base) == 0
3798                         or die_error('404 Not Found', "Base object does not exist");
3799
3800                 # here errors should not hapen
3801                 open my $fd, "-|", git_cmd(), "ls-tree", $hash_base, "--", $file_name
3802                         or die_error(undef, "Open git-ls-tree failed");
3803                 my $line = <$fd>;
3804                 close $fd;
3805
3806                 #'100644 blob 0fa3f3a66fb6a137f6ec2c19351ed4d807070ffa  panic.c'
3807                 unless ($line && $line =~ m/^([0-9]+) (.+) ([0-9a-fA-F]{40})\t/) {
3808                         die_error('404 Not Found', "File or directory for given base does not exist");
3809                 }
3810                 $type = $2;
3811                 $hash = $3;
3812         } else {
3813                 die_error('404 Not Found', "Not enough information to find object");
3814         }
3815
3816         print $cgi->redirect(-uri => href(action=>$type, -full=>1,
3817                                           hash=>$hash, hash_base=>$hash_base,
3818                                           file_name=>$file_name),
3819                              -status => '302 Found');
3820 }
3821
3822 sub git_blobdiff {
3823         my $format = shift || 'html';
3824
3825         my $fd;
3826         my @difftree;
3827         my %diffinfo;
3828         my $expires;
3829
3830         # preparing $fd and %diffinfo for git_patchset_body
3831         # new style URI
3832         if (defined $hash_base && defined $hash_parent_base) {
3833                 if (defined $file_name) {
3834                         # read raw output
3835                         open $fd, "-|", git_cmd(), "diff-tree", '-r', @diff_opts,
3836                                 $hash_parent_base, $hash_base,
3837                                 "--", $file_name
3838                                 or die_error(undef, "Open git-diff-tree failed");
3839                         @difftree = map { chomp; $_ } <$fd>;
3840                         close $fd
3841                                 or die_error(undef, "Reading git-diff-tree failed");
3842                         @difftree
3843                                 or die_error('404 Not Found', "Blob diff not found");
3844
3845                 } elsif (defined $hash &&
3846                          $hash =~ /[0-9a-fA-F]{40}/) {
3847                         # try to find filename from $hash
3848
3849                         # read filtered raw output
3850                         open $fd, "-|", git_cmd(), "diff-tree", '-r', @diff_opts,
3851                                 $hash_parent_base, $hash_base, "--"
3852                                 or die_error(undef, "Open git-diff-tree failed");
3853                         @difftree =
3854                                 # ':100644 100644 03b21826... 3b93d5e7... M     ls-files.c'
3855                                 # $hash == to_id
3856                                 grep { /^:[0-7]{6} [0-7]{6} [0-9a-fA-F]{40} $hash/ }
3857                                 map { chomp; $_ } <$fd>;
3858                         close $fd
3859                                 or die_error(undef, "Reading git-diff-tree failed");
3860                         @difftree
3861                                 or die_error('404 Not Found', "Blob diff not found");
3862
3863                 } else {
3864                         die_error('404 Not Found', "Missing one of the blob diff parameters");
3865                 }
3866
3867                 if (@difftree > 1) {
3868                         die_error('404 Not Found', "Ambiguous blob diff specification");
3869                 }
3870
3871                 %diffinfo = parse_difftree_raw_line($difftree[0]);
3872                 $file_parent ||= $diffinfo{'from_file'} || $file_name || $diffinfo{'file'};
3873                 $file_name   ||= $diffinfo{'to_file'}   || $diffinfo{'file'};
3874
3875                 $hash_parent ||= $diffinfo{'from_id'};
3876                 $hash        ||= $diffinfo{'to_id'};
3877
3878                 # non-textual hash id's can be cached
3879                 if ($hash_base =~ m/^[0-9a-fA-F]{40}$/ &&
3880                     $hash_parent_base =~ m/^[0-9a-fA-F]{40}$/) {
3881                         $expires = '+1d';
3882                 }
3883
3884                 # open patch output
3885                 open $fd, "-|", git_cmd(), "diff-tree", '-r', @diff_opts,
3886                         '-p', $hash_parent_base, $hash_base,
3887                         "--", $file_name
3888                         or die_error(undef, "Open git-diff-tree failed");
3889         }
3890
3891         # old/legacy style URI
3892         if (!%diffinfo && # if new style URI failed
3893             defined $hash && defined $hash_parent) {
3894                 # fake git-diff-tree raw output
3895                 $diffinfo{'from_mode'} = $diffinfo{'to_mode'} = "blob";
3896                 $diffinfo{'from_id'} = $hash_parent;
3897                 $diffinfo{'to_id'}   = $hash;
3898                 if (defined $file_name) {
3899                         if (defined $file_parent) {
3900                                 $diffinfo{'status'} = '2';
3901                                 $diffinfo{'from_file'} = $file_parent;
3902                                 $diffinfo{'to_file'}   = $file_name;
3903                         } else { # assume not renamed
3904                                 $diffinfo{'status'} = '1';
3905                                 $diffinfo{'from_file'} = $file_name;
3906                                 $diffinfo{'to_file'}   = $file_name;
3907                         }
3908                 } else { # no filename given
3909                         $diffinfo{'status'} = '2';
3910                         $diffinfo{'from_file'} = $hash_parent;
3911                         $diffinfo{'to_file'}   = $hash;
3912                 }
3913
3914                 # non-textual hash id's can be cached
3915                 if ($hash =~ m/^[0-9a-fA-F]{40}$/ &&
3916                     $hash_parent =~ m/^[0-9a-fA-F]{40}$/) {
3917                         $expires = '+1d';
3918                 }
3919
3920                 # open patch output
3921                 open $fd, "-|", git_cmd(), "diff", '-p', @diff_opts,
3922                         $hash_parent, $hash, "--"
3923                         or die_error(undef, "Open git-diff failed");
3924         } else  {
3925                 die_error('404 Not Found', "Missing one of the blob diff parameters")
3926                         unless %diffinfo;
3927         }
3928
3929         # header
3930         if ($format eq 'html') {
3931                 my $formats_nav =
3932                         $cgi->a({-href => href(action=>"blobdiff_plain",
3933                                                hash=>$hash, hash_parent=>$hash_parent,
3934                                                hash_base=>$hash_base, hash_parent_base=>$hash_parent_base,
3935                                                file_name=>$file_name, file_parent=>$file_parent)},
3936                                 "raw");
3937                 git_header_html(undef, $expires);
3938                 if (defined $hash_base && (my %co = parse_commit($hash_base))) {
3939                         git_print_page_nav('','', $hash_base,$co{'tree'},$hash_base, $formats_nav);
3940                         git_print_header_div('commit', esc_html($co{'title'}), $hash_base);
3941                 } else {
3942                         print "<div class=\"page_nav\"><br/>$formats_nav<br/></div>\n";
3943                         print "<div class=\"title\">$hash vs $hash_parent</div>\n";
3944                 }
3945                 if (defined $file_name) {
3946                         git_print_page_path($file_name, "blob", $hash_base);
3947                 } else {
3948                         print "<div class=\"page_path\"></div>\n";
3949                 }
3950
3951         } elsif ($format eq 'plain') {
3952                 print $cgi->header(
3953                         -type => 'text/plain',
3954                         -charset => 'utf-8',
3955                         -expires => $expires,
3956                         -content_disposition => 'inline; filename="' . "$file_name" . '.patch"');
3957
3958                 print "X-Git-Url: " . $cgi->self_url() . "\n\n";
3959
3960         } else {
3961                 die_error(undef, "Unknown blobdiff format");
3962         }
3963
3964         # patch
3965         if ($format eq 'html') {
3966                 print "<div class=\"page_body\">\n";
3967
3968                 git_patchset_body($fd, [ \%diffinfo ], $hash_base, $hash_parent_base);
3969                 close $fd;
3970
3971                 print "</div>\n"; # class="page_body"
3972                 git_footer_html();
3973
3974         } else {
3975                 while (my $line = <$fd>) {
3976                         $line =~ s!a/($hash|$hash_parent)!'a/'.esc_path($diffinfo{'from_file'})!eg;
3977                         $line =~ s!b/($hash|$hash_parent)!'b/'.esc_path($diffinfo{'to_file'})!eg;
3978
3979                         print $line;
3980
3981                         last if $line =~ m!^\+\+\+!;
3982                 }
3983                 local $/ = undef;
3984                 print <$fd>;
3985                 close $fd;
3986         }
3987 }
3988
3989 sub git_blobdiff_plain {
3990         git_blobdiff('plain');
3991 }
3992
3993 sub git_commitdiff {
3994         my $format = shift || 'html';
3995         $hash ||= $hash_base || "HEAD";
3996         my %co = parse_commit($hash);
3997         if (!%co) {
3998                 die_error(undef, "Unknown commit object");
3999         }
4000
4001         # we need to prepare $formats_nav before any parameter munging
4002         my $formats_nav;
4003         if ($format eq 'html') {
4004                 $formats_nav =
4005                         $cgi->a({-href => href(action=>"commitdiff_plain",
4006                                                hash=>$hash, hash_parent=>$hash_parent)},
4007                                 "raw");
4008
4009                 if (defined $hash_parent) {
4010                         # commitdiff with two commits given
4011                         my $hash_parent_short = $hash_parent;
4012                         if ($hash_parent =~ m/^[0-9a-fA-F]{40}$/) {
4013                                 $hash_parent_short = substr($hash_parent, 0, 7);
4014                         }
4015                         $formats_nav .=
4016                                 ' (from: ' .
4017                                 $cgi->a({-href => href(action=>"commitdiff",
4018                                                        hash=>$hash_parent)},
4019                                         esc_html($hash_parent_short)) .
4020                                 ')';
4021                 } elsif (!$co{'parent'}) {
4022                         # --root commitdiff
4023                         $formats_nav .= ' (initial)';
4024                 } elsif (scalar @{$co{'parents'}} == 1) {
4025                         # single parent commit
4026                         $formats_nav .=
4027                                 ' (parent: ' .
4028                                 $cgi->a({-href => href(action=>"commitdiff",
4029                                                        hash=>$co{'parent'})},
4030                                         esc_html(substr($co{'parent'}, 0, 7))) .
4031                                 ')';
4032                 } else {
4033                         # merge commit
4034                         $formats_nav .=
4035                                 ' (merge: ' .
4036                                 join(' ', map {
4037                                         $cgi->a({-href => href(action=>"commitdiff",
4038                                                                hash=>$_)},
4039                                                 esc_html(substr($_, 0, 7)));
4040                                 } @{$co{'parents'}} ) .
4041                                 ')';
4042                 }
4043         }
4044
4045         if (!defined $hash_parent) {
4046                 $hash_parent = $co{'parent'} || '--root';
4047         }
4048
4049         # read commitdiff
4050         my $fd;
4051         my @difftree;
4052         if ($format eq 'html') {
4053                 open $fd, "-|", git_cmd(), "diff-tree", '-r', @diff_opts,
4054                         "--no-commit-id", "--patch-with-raw", "--full-index",
4055                         $hash_parent, $hash, "--"
4056                         or die_error(undef, "Open git-diff-tree failed");
4057
4058                 while (my $line = <$fd>) {
4059                         chomp $line;
4060                         # empty line ends raw part of diff-tree output
4061                         last unless $line;
4062                         push @difftree, $line;
4063                 }
4064
4065         } elsif ($format eq 'plain') {
4066                 open $fd, "-|", git_cmd(), "diff-tree", '-r', @diff_opts,
4067                         '-p', $hash_parent, $hash, "--"
4068                         or die_error(undef, "Open git-diff-tree failed");
4069
4070         } else {
4071                 die_error(undef, "Unknown commitdiff format");
4072         }
4073
4074         # non-textual hash id's can be cached
4075         my $expires;
4076         if ($hash =~ m/^[0-9a-fA-F]{40}$/) {
4077                 $expires = "+1d";
4078         }
4079
4080         # write commit message
4081         if ($format eq 'html') {
4082                 my $refs = git_get_references();
4083                 my $ref = format_ref_marker($refs, $co{'id'});
4084
4085                 git_header_html(undef, $expires);
4086                 git_print_page_nav('commitdiff','', $hash,$co{'tree'},$hash, $formats_nav);
4087                 git_print_header_div('commit', esc_html($co{'title'}) . $ref, $hash);
4088                 git_print_authorship(\%co);
4089                 print "<div class=\"page_body\">\n";
4090                 if (@{$co{'comment'}} > 1) {
4091                         print "<div class=\"log\">\n";
4092                         git_print_log($co{'comment'}, -final_empty_line=> 1, -remove_title => 1);
4093                         print "</div>\n"; # class="log"
4094                 }
4095
4096         } elsif ($format eq 'plain') {
4097                 my $refs = git_get_references("tags");
4098                 my $tagname = git_get_rev_name_tags($hash);
4099                 my $filename = basename($project) . "-$hash.patch";
4100
4101                 print $cgi->header(
4102                         -type => 'text/plain',
4103                         -charset => 'utf-8',
4104                         -expires => $expires,
4105                         -content_disposition => 'inline; filename="' . "$filename" . '"');
4106                 my %ad = parse_date($co{'author_epoch'}, $co{'author_tz'});
4107                 print <<TEXT;
4108 From: $co{'author'}
4109 Date: $ad{'rfc2822'} ($ad{'tz_local'})
4110 Subject: $co{'title'}
4111 TEXT
4112                 print "X-Git-Tag: $tagname\n" if $tagname;
4113                 print "X-Git-Url: " . $cgi->self_url() . "\n\n";
4114
4115                 foreach my $line (@{$co{'comment'}}) {
4116                         print "$line\n";
4117                 }
4118                 print "---\n\n";
4119         }
4120
4121         # write patch
4122         if ($format eq 'html') {
4123                 git_difftree_body(\@difftree, $hash, $hash_parent);
4124                 print "<br/>\n";
4125
4126                 git_patchset_body($fd, \@difftree, $hash, $hash_parent);
4127                 close $fd;
4128                 print "</div>\n"; # class="page_body"
4129                 git_footer_html();
4130
4131         } elsif ($format eq 'plain') {
4132                 local $/ = undef;
4133                 print <$fd>;
4134                 close $fd
4135                         or print "Reading git-diff-tree failed\n";
4136         }
4137 }
4138
4139 sub git_commitdiff_plain {
4140         git_commitdiff('plain');
4141 }
4142
4143 sub git_history {
4144         if (!defined $hash_base) {
4145                 $hash_base = git_get_head_hash($project);
4146         }
4147         if (!defined $page) {
4148                 $page = 0;
4149         }
4150         my $ftype;
4151         my %co = parse_commit($hash_base);
4152         if (!%co) {
4153                 die_error(undef, "Unknown commit object");
4154         }
4155
4156         my $refs = git_get_references();
4157         my $limit = sprintf("--max-count=%i", (100 * ($page+1)));
4158
4159         if (!defined $hash && defined $file_name) {
4160                 $hash = git_get_hash_by_path($hash_base, $file_name);
4161         }
4162         if (defined $hash) {
4163                 $ftype = git_get_type($hash);
4164         }
4165
4166         open my $fd, "-|",
4167                 git_cmd(), "rev-list", $limit, "--full-history", $hash_base, "--", $file_name
4168                         or die_error(undef, "Open git-rev-list-failed");
4169         my @revlist = map { chomp; $_ } <$fd>;
4170         close $fd
4171                 or die_error(undef, "Reading git-rev-list failed");
4172
4173         my $paging_nav = '';
4174         if ($page > 0) {
4175                 $paging_nav .=
4176                         $cgi->a({-href => href(action=>"history", hash=>$hash, hash_base=>$hash_base,
4177                                                file_name=>$file_name)},
4178                                 "first");
4179                 $paging_nav .= " &sdot; " .
4180                         $cgi->a({-href => href(action=>"history", hash=>$hash, hash_base=>$hash_base,
4181                                                file_name=>$file_name, page=>$page-1),
4182                                  -accesskey => "p", -title => "Alt-p"}, "prev");
4183         } else {
4184                 $paging_nav .= "first";
4185                 $paging_nav .= " &sdot; prev";
4186         }
4187         if ($#revlist >= (100 * ($page+1)-1)) {
4188                 $paging_nav .= " &sdot; " .
4189                         $cgi->a({-href => href(action=>"history", hash=>$hash, hash_base=>$hash_base,
4190                                                file_name=>$file_name, page=>$page+1),
4191                                  -accesskey => "n", -title => "Alt-n"}, "next");
4192         } else {
4193                 $paging_nav .= " &sdot; next";
4194         }
4195         my $next_link = '';
4196         if ($#revlist >= (100 * ($page+1)-1)) {
4197                 $next_link =
4198                         $cgi->a({-href => href(action=>"history", hash=>$hash, hash_base=>$hash_base,
4199                                                file_name=>$file_name, page=>$page+1),
4200                                  -title => "Alt-n"}, "next");
4201         }
4202
4203         git_header_html();
4204         git_print_page_nav('history','', $hash_base,$co{'tree'},$hash_base, $paging_nav);
4205         git_print_header_div('commit', esc_html($co{'title'}), $hash_base);
4206         git_print_page_path($file_name, $ftype, $hash_base);
4207
4208         git_history_body(\@revlist, ($page * 100), $#revlist,
4209                          $refs, $hash_base, $ftype, $next_link);
4210
4211         git_footer_html();
4212 }
4213
4214 sub git_search {
4215         my ($have_search) = gitweb_check_feature('search');
4216         if (!$have_search) {
4217                 die_error('403 Permission denied', "Permission denied");
4218         }
4219         if (!defined $searchtext) {
4220                 die_error(undef, "Text field empty");
4221         }
4222         if (!defined $hash) {
4223                 $hash = git_get_head_hash($project);
4224         }
4225         my %co = parse_commit($hash);
4226         if (!%co) {
4227                 die_error(undef, "Unknown commit object");
4228         }
4229         if (!defined $page) {
4230                 $page = 0;
4231         }
4232
4233         $searchtype ||= 'commit';
4234         if ($searchtype eq 'pickaxe') {
4235                 # pickaxe may take all resources of your box and run for several minutes
4236                 # with every query - so decide by yourself how public you make this feature
4237                 my ($have_pickaxe) = gitweb_check_feature('pickaxe');
4238                 if (!$have_pickaxe) {
4239                         die_error('403 Permission denied', "Permission denied");
4240                 }
4241         }
4242
4243         git_header_html();
4244
4245         if ($searchtype eq 'commit' or $searchtype eq 'author' or $searchtype eq 'committer') {
4246                 my $greptype;
4247                 if ($searchtype eq 'commit') {
4248                         $greptype = "--grep=";
4249                 } elsif ($searchtype eq 'author') {
4250                         $greptype = "--author=";
4251                 } elsif ($searchtype eq 'committer') {
4252                         $greptype = "--committer=";
4253                 }
4254                 open my $fd, "-|", git_cmd(), "rev-list",
4255                         ("--max-count=" . (100 * ($page+1))),
4256                         ($greptype . $searchtext),
4257                         $hash, "--"
4258                         or next;
4259                 my @revlist = map { chomp; $_ } <$fd>;
4260                 close $fd;
4261
4262                 my $paging_nav = '';
4263                 if ($page > 0) {
4264                         $paging_nav .=
4265                                 $cgi->a({-href => href(action=>"search", hash=>$hash,
4266                                                        searchtext=>$searchtext, searchtype=>$searchtype)},
4267                                         "first");
4268                         $paging_nav .= " &sdot; " .
4269                                 $cgi->a({-href => href(action=>"search", hash=>$hash,
4270                                                        searchtext=>$searchtext, searchtype=>$searchtype,
4271                                                        page=>$page-1),
4272                                          -accesskey => "p", -title => "Alt-p"}, "prev");
4273                 } else {
4274                         $paging_nav .= "first";
4275                         $paging_nav .= " &sdot; prev";
4276                 }
4277                 if ($#revlist >= (100 * ($page+1)-1)) {
4278                         $paging_nav .= " &sdot; " .
4279                                 $cgi->a({-href => href(action=>"search", hash=>$hash,
4280                                                        searchtext=>$searchtext, searchtype=>$searchtype,
4281                                                        page=>$page+1),
4282                                          -accesskey => "n", -title => "Alt-n"}, "next");
4283                 } else {
4284                         $paging_nav .= " &sdot; next";
4285                 }
4286                 my $next_link = '';
4287                 if ($#revlist >= (100 * ($page+1)-1)) {
4288                         $next_link =
4289                                 $cgi->a({-href => href(action=>"search", hash=>$hash,
4290                                                        searchtext=>$searchtext, searchtype=>$searchtype,
4291                                                        page=>$page+1),
4292                                          -accesskey => "n", -title => "Alt-n"}, "next");
4293                 }
4294
4295                 git_print_page_nav('','', $hash,$co{'tree'},$hash, $paging_nav);
4296                 git_print_header_div('commit', esc_html($co{'title'}), $hash);
4297                 git_search_grep_body(\@revlist, ($page * 100), $#revlist, $next_link);
4298         }
4299
4300         if ($searchtype eq 'pickaxe') {
4301                 git_print_page_nav('','', $hash,$co{'tree'},$hash);
4302                 git_print_header_div('commit', esc_html($co{'title'}), $hash);
4303
4304                 print "<table cellspacing=\"0\">\n";
4305                 my $alternate = 1;
4306                 $/ = "\n";
4307                 my $git_command = git_cmd_str();
4308                 open my $fd, "-|", "$git_command rev-list $hash | " .
4309                         "$git_command diff-tree -r --stdin -S\'$searchtext\'";
4310                 undef %co;
4311                 my @files;
4312                 while (my $line = <$fd>) {
4313                         if (%co && $line =~ m/^:([0-7]{6}) ([0-7]{6}) ([0-9a-fA-F]{40}) ([0-9a-fA-F]{40}) (.)\t(.*)$/) {
4314                                 my %set;
4315                                 $set{'file'} = $6;
4316                                 $set{'from_id'} = $3;
4317                                 $set{'to_id'} = $4;
4318                                 $set{'id'} = $set{'to_id'};
4319                                 if ($set{'id'} =~ m/0{40}/) {
4320                                         $set{'id'} = $set{'from_id'};
4321                                 }
4322                                 if ($set{'id'} =~ m/0{40}/) {
4323                                         next;
4324                                 }
4325                                 push @files, \%set;
4326                         } elsif ($line =~ m/^([0-9a-fA-F]{40})$/){
4327                                 if (%co) {
4328                                         if ($alternate) {
4329                                                 print "<tr class=\"dark\">\n";
4330                                         } else {
4331                                                 print "<tr class=\"light\">\n";
4332                                         }
4333                                         $alternate ^= 1;
4334                                         print "<td title=\"$co{'age_string_age'}\"><i>$co{'age_string_date'}</i></td>\n" .
4335                                               "<td><i>" . esc_html(chop_str($co{'author_name'}, 15, 5)) . "</i></td>\n" .
4336                                               "<td>" .
4337                                               $cgi->a({-href => href(action=>"commit", hash=>$co{'id'}),
4338                                                       -class => "list subject"},
4339                                                       esc_html(chop_str($co{'title'}, 50)) . "<br/>");
4340                                         while (my $setref = shift @files) {
4341                                                 my %set = %$setref;
4342                                                 print $cgi->a({-href => href(action=>"blob", hash_base=>$co{'id'},
4343                                                                              hash=>$set{'id'}, file_name=>$set{'file'}),
4344                                                               -class => "list"},
4345                                                               "<span class=\"match\">" . esc_path($set{'file'}) . "</span>") .
4346                                                       "<br/>\n";
4347                                         }
4348                                         print "</td>\n" .
4349                                               "<td class=\"link\">" .
4350                                               $cgi->a({-href => href(action=>"commit", hash=>$co{'id'})}, "commit") .
4351                                               " | " .
4352                                               $cgi->a({-href => href(action=>"tree", hash=>$co{'tree'}, hash_base=>$co{'id'})}, "tree");
4353                                         print "</td>\n" .
4354                                               "</tr>\n";
4355                                 }
4356                                 %co = parse_commit($1);
4357                         }
4358                 }
4359                 close $fd;
4360
4361                 print "</table>\n";
4362         }
4363         git_footer_html();
4364 }
4365
4366 sub git_search_help {
4367         git_header_html();
4368         git_print_page_nav('','', $hash,$hash,$hash);
4369         print <<EOT;
4370 <dl>
4371 <dt><b>commit</b></dt>
4372 <dd>The commit messages and authorship information will be scanned for the given string.</dd>
4373 <dt><b>author</b></dt>
4374 <dd>Name and e-mail of the change author and date of birth of the patch will be scanned for the given string.</dd>
4375 <dt><b>committer</b></dt>
4376 <dd>Name and e-mail of the committer and date of commit will be scanned for the given string.</dd>
4377 EOT
4378         my ($have_pickaxe) = gitweb_check_feature('pickaxe');
4379         if ($have_pickaxe) {
4380                 print <<EOT;
4381 <dt><b>pickaxe</b></dt>
4382 <dd>All commits that caused the string to appear or disappear from any file (changes that
4383 added, removed or "modified" the string) will be listed. This search can take a while and
4384 takes a lot of strain on the server, so please use it wisely.</dd>
4385 EOT
4386         }
4387         print "</dl>\n";
4388         git_footer_html();
4389 }
4390
4391 sub git_shortlog {
4392         my $head = git_get_head_hash($project);
4393         if (!defined $hash) {
4394                 $hash = $head;
4395         }
4396         if (!defined $page) {
4397                 $page = 0;
4398         }
4399         my $refs = git_get_references();
4400
4401         my $limit = sprintf("--max-count=%i", (100 * ($page+1)));
4402         open my $fd, "-|", git_cmd(), "rev-list", $limit, $hash, "--"
4403                 or die_error(undef, "Open git-rev-list failed");
4404         my @revlist = map { chomp; $_ } <$fd>;
4405         close $fd;
4406
4407         my $paging_nav = format_paging_nav('shortlog', $hash, $head, $page, $#revlist);
4408         my $next_link = '';
4409         if ($#revlist >= (100 * ($page+1)-1)) {
4410                 $next_link =
4411                         $cgi->a({-href => href(action=>"shortlog", hash=>$hash, page=>$page+1),
4412                                  -title => "Alt-n"}, "next");
4413         }
4414
4415
4416         git_header_html();
4417         git_print_page_nav('shortlog','', $hash,$hash,$hash, $paging_nav);
4418         git_print_header_div('summary', $project);
4419
4420         git_shortlog_body(\@revlist, ($page * 100), $#revlist, $refs, $next_link);
4421
4422         git_footer_html();
4423 }
4424
4425 ## ......................................................................
4426 ## feeds (RSS, Atom; OPML)
4427
4428 sub git_feed {
4429         my $format = shift || 'atom';
4430         my ($have_blame) = gitweb_check_feature('blame');
4431
4432         # Atom: http://www.atomenabled.org/developers/syndication/
4433         # RSS:  http://www.notestips.com/80256B3A007F2692/1/NAMO5P9UPQ
4434         if ($format ne 'rss' && $format ne 'atom') {
4435                 die_error(undef, "Unknown web feed format");
4436         }
4437
4438         # log/feed of current (HEAD) branch, log of given branch, history of file/directory
4439         my $head = $hash || 'HEAD';
4440         open my $fd, "-|", git_cmd(), "rev-list", "--max-count=150",
4441                 $head, "--", (defined $file_name ? $file_name : ())
4442                 or die_error(undef, "Open git-rev-list failed");
4443         my @revlist = map { chomp; $_ } <$fd>;
4444         close $fd or die_error(undef, "Reading git-rev-list failed");
4445
4446         my %latest_commit;
4447         my %latest_date;
4448         my $content_type = "application/$format+xml";
4449         if (defined $cgi->http('HTTP_ACCEPT') &&
4450                  $cgi->Accept('text/xml') > $cgi->Accept($content_type)) {
4451                 # browser (feed reader) prefers text/xml
4452                 $content_type = 'text/xml';
4453         }
4454         if (defined($revlist[0])) {
4455                 %latest_commit = parse_commit($revlist[0]);
4456                 %latest_date   = parse_date($latest_commit{'author_epoch'});
4457                 print $cgi->header(
4458                         -type => $content_type,
4459                         -charset => 'utf-8',
4460                         -last_modified => $latest_date{'rfc2822'});
4461         } else {
4462                 print $cgi->header(
4463                         -type => $content_type,
4464                         -charset => 'utf-8');
4465         }
4466
4467         # Optimization: skip generating the body if client asks only
4468         # for Last-Modified date.
4469         return if ($cgi->request_method() eq 'HEAD');
4470
4471         # header variables
4472         my $title = "$site_name - $project/$action";
4473         my $feed_type = 'log';
4474         if (defined $hash) {
4475                 $title .= " - '$hash'";
4476                 $feed_type = 'branch log';
4477                 if (defined $file_name) {
4478                         $title .= " :: $file_name";
4479                         $feed_type = 'history';
4480                 }
4481         } elsif (defined $file_name) {
4482                 $title .= " - $file_name";
4483                 $feed_type = 'history';
4484         }
4485         $title .= " $feed_type";
4486         my $descr = git_get_project_description($project);
4487         if (defined $descr) {
4488                 $descr = esc_html($descr);
4489         } else {
4490                 $descr = "$project " .
4491                          ($format eq 'rss' ? 'RSS' : 'Atom') .
4492                          " feed";
4493         }
4494         my $owner = git_get_project_owner($project);
4495         $owner = esc_html($owner);
4496
4497         #header
4498         my $alt_url;
4499         if (defined $file_name) {
4500                 $alt_url = href(-full=>1, action=>"history", hash=>$hash, file_name=>$file_name);
4501         } elsif (defined $hash) {
4502                 $alt_url = href(-full=>1, action=>"log", hash=>$hash);
4503         } else {
4504                 $alt_url = href(-full=>1, action=>"summary");
4505         }
4506         print qq!<?xml version="1.0" encoding="utf-8"?>\n!;
4507         if ($format eq 'rss') {
4508                 print <<XML;
4509 <rss version="2.0" xmlns:content="http://purl.org/rss/1.0/modules/content/">
4510 <channel>
4511 XML
4512                 print "<title>$title</title>\n" .
4513                       "<link>$alt_url</link>\n" .
4514                       "<description>$descr</description>\n" .
4515                       "<language>en</language>\n";
4516         } elsif ($format eq 'atom') {
4517                 print <<XML;
4518 <feed xmlns="http://www.w3.org/2005/Atom">
4519 XML
4520                 print "<title>$title</title>\n" .
4521                       "<subtitle>$descr</subtitle>\n" .
4522                       '<link rel="alternate" type="text/html" href="' .
4523                       $alt_url . '" />' . "\n" .
4524                       '<link rel="self" type="' . $content_type . '" href="' .
4525                       $cgi->self_url() . '" />' . "\n" .
4526                       "<id>" . href(-full=>1) . "</id>\n" .
4527                       # use project owner for feed author
4528                       "<author><name>$owner</name></author>\n";
4529                 if (defined $favicon) {
4530                         print "<icon>" . esc_url($favicon) . "</icon>\n";
4531                 }
4532                 if (defined $logo_url) {
4533                         # not twice as wide as tall: 72 x 27 pixels
4534                         print "<logo>" . esc_url($logo) . "</logo>\n";
4535                 }
4536                 if (! %latest_date) {
4537                         # dummy date to keep the feed valid until commits trickle in:
4538                         print "<updated>1970-01-01T00:00:00Z</updated>\n";
4539                 } else {
4540                         print "<updated>$latest_date{'iso-8601'}</updated>\n";
4541                 }
4542         }
4543
4544         # contents
4545         for (my $i = 0; $i <= $#revlist; $i++) {
4546                 my $commit = $revlist[$i];
4547                 my %co = parse_commit($commit);
4548                 # we read 150, we always show 30 and the ones more recent than 48 hours
4549                 if (($i >= 20) && ((time - $co{'author_epoch'}) > 48*60*60)) {
4550                         last;
4551                 }
4552                 my %cd = parse_date($co{'author_epoch'});
4553
4554                 # get list of changed files
4555                 open $fd, "-|", git_cmd(), "diff-tree", '-r', @diff_opts,
4556                         $co{'parent'}, $co{'id'}, "--", (defined $file_name ? $file_name : ())
4557                         or next;
4558                 my @difftree = map { chomp; $_ } <$fd>;
4559                 close $fd
4560                         or next;
4561
4562                 # print element (entry, item)
4563                 my $co_url = href(-full=>1, action=>"commit", hash=>$commit);
4564                 if ($format eq 'rss') {
4565                         print "<item>\n" .
4566                               "<title>" . esc_html($co{'title'}) . "</title>\n" .
4567                               "<author>" . esc_html($co{'author'}) . "</author>\n" .
4568                               "<pubDate>$cd{'rfc2822'}</pubDate>\n" .
4569                               "<guid isPermaLink=\"true\">$co_url</guid>\n" .
4570                               "<link>$co_url</link>\n" .
4571                               "<description>" . esc_html($co{'title'}) . "</description>\n" .
4572                               "<content:encoded>" .
4573                               "<![CDATA[\n";
4574                 } elsif ($format eq 'atom') {
4575                         print "<entry>\n" .
4576                               "<title type=\"html\">" . esc_html($co{'title'}) . "</title>\n" .
4577                               "<updated>$cd{'iso-8601'}</updated>\n" .
4578                               "<author>\n" .
4579                               "  <name>" . esc_html($co{'author_name'}) . "</name>\n";
4580                         if ($co{'author_email'}) {
4581                                 print "  <email>" . esc_html($co{'author_email'}) . "</email>\n";
4582                         }
4583                         print "</author>\n" .
4584                               # use committer for contributor
4585                               "<contributor>\n" .
4586                               "  <name>" . esc_html($co{'committer_name'}) . "</name>\n";
4587                         if ($co{'committer_email'}) {
4588                                 print "  <email>" . esc_html($co{'committer_email'}) . "</email>\n";
4589                         }
4590                         print "</contributor>\n" .
4591                               "<published>$cd{'iso-8601'}</published>\n" .
4592                               "<link rel=\"alternate\" type=\"text/html\" href=\"$co_url\" />\n" .
4593                               "<id>$co_url</id>\n" .
4594                               "<content type=\"xhtml\" xml:base=\"" . esc_url($my_url) . "\">\n" .
4595                               "<div xmlns=\"http://www.w3.org/1999/xhtml\">\n";
4596                 }
4597                 my $comment = $co{'comment'};
4598                 print "<pre>\n";
4599                 foreach my $line (@$comment) {
4600                         $line = esc_html($line);
4601                         print "$line\n";
4602                 }
4603                 print "</pre><ul>\n";
4604                 foreach my $difftree_line (@difftree) {
4605                         my %difftree = parse_difftree_raw_line($difftree_line);
4606                         next if !$difftree{'from_id'};
4607
4608                         my $file = $difftree{'file'} || $difftree{'to_file'};
4609
4610                         print "<li>" .
4611                               "[" .
4612                               $cgi->a({-href => href(-full=>1, action=>"blobdiff",
4613                                                      hash=>$difftree{'to_id'}, hash_parent=>$difftree{'from_id'},
4614                                                      hash_base=>$co{'id'}, hash_parent_base=>$co{'parent'},
4615                                                      file_name=>$file, file_parent=>$difftree{'from_file'}),
4616                                       -title => "diff"}, 'D');
4617                         if ($have_blame) {
4618                                 print $cgi->a({-href => href(-full=>1, action=>"blame",
4619                                                              file_name=>$file, hash_base=>$commit),
4620                                               -title => "blame"}, 'B');
4621                         }
4622                         # if this is not a feed of a file history
4623                         if (!defined $file_name || $file_name ne $file) {
4624                                 print $cgi->a({-href => href(-full=>1, action=>"history",
4625                                                              file_name=>$file, hash=>$commit),
4626                                               -title => "history"}, 'H');
4627                         }
4628                         $file = esc_path($file);
4629                         print "] ".
4630                               "$file</li>\n";
4631                 }
4632                 if ($format eq 'rss') {
4633                         print "</ul>]]>\n" .
4634                               "</content:encoded>\n" .
4635                               "</item>\n";
4636                 } elsif ($format eq 'atom') {
4637                         print "</ul>\n</div>\n" .
4638                               "</content>\n" .
4639                               "</entry>\n";
4640                 }
4641         }
4642
4643         # end of feed
4644         if ($format eq 'rss') {
4645                 print "</channel>\n</rss>\n";
4646         }       elsif ($format eq 'atom') {
4647                 print "</feed>\n";
4648         }
4649 }
4650
4651 sub git_rss {
4652         git_feed('rss');
4653 }
4654
4655 sub git_atom {
4656         git_feed('atom');
4657 }
4658
4659 sub git_opml {
4660         my @list = git_get_projects_list();
4661
4662         print $cgi->header(-type => 'text/xml', -charset => 'utf-8');
4663         print <<XML;
4664 <?xml version="1.0" encoding="utf-8"?>
4665 <opml version="1.0">
4666 <head>
4667   <title>$site_name OPML Export</title>
4668 </head>
4669 <body>
4670 <outline text="git RSS feeds">
4671 XML
4672
4673         foreach my $pr (@list) {
4674                 my %proj = %$pr;
4675                 my $head = git_get_head_hash($proj{'path'});
4676                 if (!defined $head) {
4677                         next;
4678                 }
4679                 $git_dir = "$projectroot/$proj{'path'}";
4680                 my %co = parse_commit($head);
4681                 if (!%co) {
4682                         next;
4683                 }
4684
4685                 my $path = esc_html(chop_str($proj{'path'}, 25, 5));
4686                 my $rss  = "$my_url?p=$proj{'path'};a=rss";
4687                 my $html = "$my_url?p=$proj{'path'};a=summary";
4688                 print "<outline type=\"rss\" text=\"$path\" title=\"$path\" xmlUrl=\"$rss\" htmlUrl=\"$html\"/>\n";
4689         }
4690         print <<XML;
4691 </outline>
4692 </body>
4693 </opml>
4694 XML
4695 }