Lady’s Gitweb - Gitweb/blob - gitweb.perl

   1 #!/usr/bin/perl
   2
   3 # gitweb - simple web interface to track changes in git repositories
   4 #
   5 # (C) 2005-2006, Kay Sievers <kay.sievers@vrfy.org>
   6 # (C) 2005, Christian Gierke
   7 #
   8 # This program is licensed under the GPLv2
   9
  10 use strict;
  11 use warnings;
  12 use CGI qw(:standard :escapeHTML -nosticky);
  13 use CGI::Util qw(unescape);
  14 use CGI::Carp qw(fatalsToBrowser);
  15 use Encode;
  16 use Fcntl ':mode';
  17 use File::Find qw();
  18 use File::Basename qw(basename);
  19 binmode STDOUT, ':utf8';
  20
  21 BEGIN {
  22         CGI->compile() if $ENV{'MOD_PERL'};
  23 }
  24
  25 our $cgi = new CGI;
  26 our $version = "++GIT_VERSION++";
  27 our $my_url = $cgi->url();
  28 our $my_uri = $cgi->url(-absolute => 1);
  29
  30 # if we're called with PATH_INFO, we have to strip that
  31 # from the URL to find our real URL
  32 # we make $path_info global because it's also used later on
  33 my $path_info = $ENV{"PATH_INFO"};
  34 if ($path_info) {
  35         $my_url =~ s,\Q$path_info\E$,,;
  36         $my_uri =~ s,\Q$path_info\E$,,;
  37 }
  38
  39 # core git executable to use
  40 # this can just be "git" if your webserver has a sensible PATH
  41 our $GIT = "++GIT_BINDIR++/git";
  42
  43 # absolute fs-path which will be prepended to the project path
  44 #our $projectroot = "/pub/scm";
  45 our $projectroot = "++GITWEB_PROJECTROOT++";
  46
  47 # fs traversing limit for getting project list
  48 # the number is relative to the projectroot
  49 our $project_maxdepth = "++GITWEB_PROJECT_MAXDEPTH++";
  50
  51 # target of the home link on top of all pages
  52 our $home_link = $my_uri || "/";
  53
  54 # string of the home link on top of all pages
  55 our $home_link_str = "++GITWEB_HOME_LINK_STR++";
  56
  57 # name of your site or organization to appear in page titles
  58 # replace this with something more descriptive for clearer bookmarks
  59 our $site_name = "++GITWEB_SITENAME++"
  60                  || ($ENV{'SERVER_NAME'} || "Untitled") . " Git";
  61
  62 # filename of html text to include at top of each page
  63 our $site_header = "++GITWEB_SITE_HEADER++";
  64 # html text to include at home page
  65 our $home_text = "++GITWEB_HOMETEXT++";
  66 # filename of html text to include at bottom of each page
  67 our $site_footer = "++GITWEB_SITE_FOOTER++";
  68
  69 # URI of stylesheets
  70 our @stylesheets = ("++GITWEB_CSS++");
  71 # URI of a single stylesheet, which can be overridden in GITWEB_CONFIG.
  72 our $stylesheet = undef;
  73
  74 # URI of GIT logo (72x27 size)
  75 our $logo = "++GITWEB_LOGO++";
  76 # URI of GIT favicon, assumed to be image/png type
  77 our $favicon = "++GITWEB_FAVICON++";
  78
  79 # URI and label (title) of GIT logo link
  80 #our $logo_url = "http://www.kernel.org/pub/software/scm/git/docs/";
  81 #our $logo_label = "git documentation";
  82 our $logo_url = "http://git.or.cz/";
  83 our $logo_label = "git homepage";
  84
  85 # source of projects list
  86 our $projects_list = "++GITWEB_LIST++";
  87
  88 # the width (in characters) of the projects list "Description" column
  89 our $projects_list_description_width = 25;
  90
  91 # default order of projects list
  92 # valid values are none, project, descr, owner, and age
  93 our $default_projects_order = "project";
  94
  95 # show repository only if this file exists
  96 # (only effective if this variable evaluates to true)
  97 our $export_ok = "++GITWEB_EXPORT_OK++";
  98
  99 # only allow viewing of repositories also shown on the overview page
 100 our $strict_export = "++GITWEB_STRICT_EXPORT++";
 101
 102 # list of git base URLs used for URL to where fetch project from,
 103 # i.e. full URL is "$git_base_url/$project"
 104 our @git_base_url_list = grep { $_ ne '' } ("++GITWEB_BASE_URL++");
 105
 106 # default blob_plain mimetype and default charset for text/plain blob
 107 our $default_blob_plain_mimetype = 'text/plain';
 108 our $default_text_plain_charset  = undef;
 109
 110 # file to use for guessing MIME types before trying /etc/mime.types
 111 # (relative to the current git repository)
 112 our $mimetypes_file = undef;
 113
 114 # assume this charset if line contains non-UTF-8 characters;
 115 # it should be valid encoding (see Encoding::Supported(3pm) for list),
 116 # for which encoding all byte sequences are valid, for example
 117 # 'iso-8859-1' aka 'latin1' (it is decoded without checking, so it
 118 # could be even 'utf-8' for the old behavior)
 119 our $fallback_encoding = 'latin1';
 120
 121 # rename detection options for git-diff and git-diff-tree
 122 # - default is '-M', with the cost proportional to
 123 #   (number of removed files) * (number of new files).
 124 # - more costly is '-C' (which implies '-M'), with the cost proportional to
 125 #   (number of changed files + number of removed files) * (number of new files)
 126 # - even more costly is '-C', '--find-copies-harder' with cost
 127 #   (number of files in the original tree) * (number of new files)
 128 # - one might want to include '-B' option, e.g. '-B', '-M'
 129 our @diff_opts = ('-M'); # taken from git_commit
 130
 131 # information about snapshot formats that gitweb is capable of serving
 132 our %known_snapshot_formats = (
 133         # name => {
 134         #       'display' => display name,
 135         #       'type' => mime type,
 136         #       'suffix' => filename suffix,
 137         #       'format' => --format for git-archive,
 138         #       'compressor' => [compressor command and arguments]
 139         #                       (array reference, optional)}
 140         #
 141         'tgz' => {
 142                 'display' => 'tar.gz',
 143                 'type' => 'application/x-gzip',
 144                 'suffix' => '.tar.gz',
 145                 'format' => 'tar',
 146                 'compressor' => ['gzip']},
 147
 148         'tbz2' => {
 149                 'display' => 'tar.bz2',
 150                 'type' => 'application/x-bzip2',
 151                 'suffix' => '.tar.bz2',
 152                 'format' => 'tar',
 153                 'compressor' => ['bzip2']},
 154
 155         'zip' => {
 156                 'display' => 'zip',
 157                 'type' => 'application/x-zip',
 158                 'suffix' => '.zip',
 159                 'format' => 'zip'},
 160 );
 161
 162 # Aliases so we understand old gitweb.snapshot values in repository
 163 # configuration.
 164 our %known_snapshot_format_aliases = (
 165         'gzip'  => 'tgz',
 166         'bzip2' => 'tbz2',
 167
 168         # backward compatibility: legacy gitweb config support
 169         'x-gzip' => undef, 'gz' => undef,
 170         'x-bzip2' => undef, 'bz2' => undef,
 171         'x-zip' => undef, '' => undef,
 172 );
 173
 174 # You define site-wide feature defaults here; override them with
 175 # $GITWEB_CONFIG as necessary.
 176 our %feature = (
 177         # feature => {
 178         #       'sub' => feature-sub (subroutine),
 179         #       'override' => allow-override (boolean),
 180         #       'default' => [ default options...] (array reference)}
 181         #
 182         # if feature is overridable (it means that allow-override has true value),
 183         # then feature-sub will be called with default options as parameters;
 184         # return value of feature-sub indicates if to enable specified feature
 185         #
 186         # if there is no 'sub' key (no feature-sub), then feature cannot be
 187         # overriden
 188         #
 189         # use gitweb_check_feature(<feature>) to check if <feature> is enabled
 190
 191         # Enable the 'blame' blob view, showing the last commit that modified
 192         # each line in the file. This can be very CPU-intensive.
 193
 194         # To enable system wide have in $GITWEB_CONFIG
 195         # $feature{'blame'}{'default'} = [1];
 196         # To have project specific config enable override in $GITWEB_CONFIG
 197         # $feature{'blame'}{'override'} = 1;
 198         # and in project config gitweb.blame = 0|1;
 199         'blame' => {
 200                 'sub' => \&feature_blame,
 201                 'override' => 0,
 202                 'default' => [0]},
 203
 204         # Enable the 'snapshot' link, providing a compressed archive of any
 205         # tree. This can potentially generate high traffic if you have large
 206         # project.
 207
 208         # Value is a list of formats defined in %known_snapshot_formats that
 209         # you wish to offer.
 210         # To disable system wide have in $GITWEB_CONFIG
 211         # $feature{'snapshot'}{'default'} = [];
 212         # To have project specific config enable override in $GITWEB_CONFIG
 213         # $feature{'snapshot'}{'override'} = 1;
 214         # and in project config, a comma-separated list of formats or "none"
 215         # to disable.  Example: gitweb.snapshot = tbz2,zip;
 216         'snapshot' => {
 217                 'sub' => \&feature_snapshot,
 218                 'override' => 0,
 219                 'default' => ['tgz']},
 220
 221         # Enable text search, which will list the commits which match author,
 222         # committer or commit text to a given string.  Enabled by default.
 223         # Project specific override is not supported.
 224         'search' => {
 225                 'override' => 0,
 226                 'default' => [1]},
 227
 228         # Enable grep search, which will list the files in currently selected
 229         # tree containing the given string. Enabled by default. This can be
 230         # potentially CPU-intensive, of course.
 231
 232         # To enable system wide have in $GITWEB_CONFIG
 233         # $feature{'grep'}{'default'} = [1];
 234         # To have project specific config enable override in $GITWEB_CONFIG
 235         # $feature{'grep'}{'override'} = 1;
 236         # and in project config gitweb.grep = 0|1;
 237         'grep' => {
 238                 'override' => 0,
 239                 'default' => [1]},
 240
 241         # Enable the pickaxe search, which will list the commits that modified
 242         # a given string in a file. This can be practical and quite faster
 243         # alternative to 'blame', but still potentially CPU-intensive.
 244
 245         # To enable system wide have in $GITWEB_CONFIG
 246         # $feature{'pickaxe'}{'default'} = [1];
 247         # To have project specific config enable override in $GITWEB_CONFIG
 248         # $feature{'pickaxe'}{'override'} = 1;
 249         # and in project config gitweb.pickaxe = 0|1;
 250         'pickaxe' => {
 251                 'sub' => \&feature_pickaxe,
 252                 'override' => 0,
 253                 'default' => [1]},
 254
 255         # Make gitweb use an alternative format of the URLs which can be
 256         # more readable and natural-looking: project name is embedded
 257         # directly in the path and the query string contains other
 258         # auxiliary information. All gitweb installations recognize
 259         # URL in either format; this configures in which formats gitweb
 260         # generates links.
 261
 262         # To enable system wide have in $GITWEB_CONFIG
 263         # $feature{'pathinfo'}{'default'} = [1];
 264         # Project specific override is not supported.
 265
 266         # Note that you will need to change the default location of CSS,
 267         # favicon, logo and possibly other files to an absolute URL. Also,
 268         # if gitweb.cgi serves as your indexfile, you will need to force
 269         # $my_uri to contain the script name in your $GITWEB_CONFIG.
 270         'pathinfo' => {
 271                 'override' => 0,
 272                 'default' => [0]},
 273
 274         # Make gitweb consider projects in project root subdirectories
 275         # to be forks of existing projects. Given project $projname.git,
 276         # projects matching $projname/*.git will not be shown in the main
 277         # projects list, instead a '+' mark will be added to $projname
 278         # there and a 'forks' view will be enabled for the project, listing
 279         # all the forks. If project list is taken from a file, forks have
 280         # to be listed after the main project.
 281
 282         # To enable system wide have in $GITWEB_CONFIG
 283         # $feature{'forks'}{'default'} = [1];
 284         # Project specific override is not supported.
 285         'forks' => {
 286                 'override' => 0,
 287                 'default' => [0]},
 288
 289         # Insert custom links to the action bar of all project pages.
 290         # This enables you mainly to link to third-party scripts integrating
 291         # into gitweb; e.g. git-browser for graphical history representation
 292         # or custom web-based repository administration interface.
 293
 294         # The 'default' value consists of a list of triplets in the form
 295         # (label, link, position) where position is the label after which
 296         # to insert the link and link is a format string where %n expands
 297         # to the project name, %f to the project path within the filesystem,
 298         # %h to the current hash (h gitweb parameter) and %b to the current
 299         # hash base (hb gitweb parameter); %% expands to %.
 300
 301         # To enable system wide have in $GITWEB_CONFIG e.g.
 302         # $feature{'actions'}{'default'} = [('graphiclog',
 303         #       '/git-browser/by-commit.html?r=%n', 'summary')];
 304         # Project specific override is not supported.
 305         'actions' => {
 306                 'override' => 0,
 307                 'default' => []},
 308
 309         # Allow gitweb scan project content tags described in ctags/
 310         # of project repository, and display the popular Web 2.0-ish
 311         # "tag cloud" near the project list. Note that this is something
 312         # COMPLETELY different from the normal Git tags.
 313
 314         # gitweb by itself can show existing tags, but it does not handle
 315         # tagging itself; you need an external application for that.
 316         # For an example script, check Girocco's cgi/tagproj.cgi.
 317         # You may want to install the HTML::TagCloud Perl module to get
 318         # a pretty tag cloud instead of just a list of tags.
 319
 320         # To enable system wide have in $GITWEB_CONFIG
 321         # $feature{'ctags'}{'default'} = ['path_to_tag_script'];
 322         # Project specific override is not supported.
 323         'ctags' => {
 324                 'override' => 0,
 325                 'default' => [0]},
 326 );
 327
 328 sub gitweb_check_feature {
 329         my ($name) = @_;
 330         return unless exists $feature{$name};
 331         my ($sub, $override, @defaults) = (
 332                 $feature{$name}{'sub'},
 333                 $feature{$name}{'override'},
 334                 @{$feature{$name}{'default'}});
 335         if (!$override) { return @defaults; }
 336         if (!defined $sub) {
 337                 warn "feature $name is not overrideable";
 338                 return @defaults;
 339         }
 340         return $sub->(@defaults);
 341 }
 342
 343 sub feature_blame {
 344         my ($val) = git_get_project_config('blame', '--bool');
 345
 346         if ($val eq 'true') {
 347                 return 1;
 348         } elsif ($val eq 'false') {
 349                 return 0;
 350         }
 351
 352         return $_[0];
 353 }
 354
 355 sub feature_snapshot {
 356         my (@fmts) = @_;
 357
 358         my ($val) = git_get_project_config('snapshot');
 359
 360         if ($val) {
 361                 @fmts = ($val eq 'none' ? () : split /\s*[,\s]\s*/, $val);
 362         }
 363
 364         return @fmts;
 365 }
 366
 367 sub feature_grep {
 368         my ($val) = git_get_project_config('grep', '--bool');
 369
 370         if ($val eq 'true') {
 371                 return (1);
 372         } elsif ($val eq 'false') {
 373                 return (0);
 374         }
 375
 376         return ($_[0]);
 377 }
 378
 379 sub feature_pickaxe {
 380         my ($val) = git_get_project_config('pickaxe', '--bool');
 381
 382         if ($val eq 'true') {
 383                 return (1);
 384         } elsif ($val eq 'false') {
 385                 return (0);
 386         }
 387
 388         return ($_[0]);
 389 }
 390
 391 # checking HEAD file with -e is fragile if the repository was
 392 # initialized long time ago (i.e. symlink HEAD) and was pack-ref'ed
 393 # and then pruned.
 394 sub check_head_link {
 395         my ($dir) = @_;
 396         my $headfile = "$dir/HEAD";
 397         return ((-e $headfile) ||
 398                 (-l $headfile && readlink($headfile) =~ /^refs\/heads\//));
 399 }
 400
 401 sub check_export_ok {
 402         my ($dir) = @_;
 403         return (check_head_link($dir) &&
 404                 (!$export_ok || -e "$dir/$export_ok"));
 405 }
 406
 407 # process alternate names for backward compatibility
 408 # filter out unsupported (unknown) snapshot formats
 409 sub filter_snapshot_fmts {
 410         my @fmts = @_;
 411
 412         @fmts = map {
 413                 exists $known_snapshot_format_aliases{$_} ?
 414                        $known_snapshot_format_aliases{$_} : $_} @fmts;
 415         @fmts = grep(exists $known_snapshot_formats{$_}, @fmts);
 416
 417 }
 418
 419 our $GITWEB_CONFIG = $ENV{'GITWEB_CONFIG'} || "++GITWEB_CONFIG++";
 420 if (-e $GITWEB_CONFIG) {
 421         do $GITWEB_CONFIG;
 422 } else {
 423         our $GITWEB_CONFIG_SYSTEM = $ENV{'GITWEB_CONFIG_SYSTEM'} || "++GITWEB_CONFIG_SYSTEM++";
 424         do $GITWEB_CONFIG_SYSTEM if -e $GITWEB_CONFIG_SYSTEM;
 425 }
 426
 427 # version of the core git binary
 428 our $git_version = qx("$GIT" --version) =~ m/git version (.*)$/ ? $1 : "unknown";
 429
 430 $projects_list ||= $projectroot;
 431
 432 # ======================================================================
 433 # input validation and dispatch
 434
 435 # input parameters can be collected from a variety of sources (presently, CGI
 436 # and PATH_INFO), so we define an %input_params hash that collects them all
 437 # together during validation: this allows subsequent uses (e.g. href()) to be
 438 # agnostic of the parameter origin
 439
 440 my %input_params = ();
 441
 442 # input parameters are stored with the long parameter name as key. This will
 443 # also be used in the href subroutine to convert parameters to their CGI
 444 # equivalent, and since the href() usage is the most frequent one, we store
 445 # the name -> CGI key mapping here, instead of the reverse.
 446 #
 447 # XXX: Warning: If you touch this, check the search form for updating,
 448 # too.
 449
 450 my @cgi_param_mapping = (
 451         project => "p",
 452         action => "a",
 453         file_name => "f",
 454         file_parent => "fp",
 455         hash => "h",
 456         hash_parent => "hp",
 457         hash_base => "hb",
 458         hash_parent_base => "hpb",
 459         page => "pg",
 460         order => "o",
 461         searchtext => "s",
 462         searchtype => "st",
 463         snapshot_format => "sf",
 464         extra_options => "opt",
 465         search_use_regexp => "sr",
 466 );
 467 my %cgi_param_mapping = @cgi_param_mapping;
 468
 469 # we will also need to know the possible actions, for validation
 470 my %actions = (
 471         "blame" => \&git_blame,
 472         "blobdiff" => \&git_blobdiff,
 473         "blobdiff_plain" => \&git_blobdiff_plain,
 474         "blob" => \&git_blob,
 475         "blob_plain" => \&git_blob_plain,
 476         "commitdiff" => \&git_commitdiff,
 477         "commitdiff_plain" => \&git_commitdiff_plain,
 478         "commit" => \&git_commit,
 479         "forks" => \&git_forks,
 480         "heads" => \&git_heads,
 481         "history" => \&git_history,
 482         "log" => \&git_log,
 483         "rss" => \&git_rss,
 484         "atom" => \&git_atom,
 485         "search" => \&git_search,
 486         "search_help" => \&git_search_help,
 487         "shortlog" => \&git_shortlog,
 488         "summary" => \&git_summary,
 489         "tag" => \&git_tag,
 490         "tags" => \&git_tags,
 491         "tree" => \&git_tree,
 492         "snapshot" => \&git_snapshot,
 493         "object" => \&git_object,
 494         # those below don't need $project
 495         "opml" => \&git_opml,
 496         "project_list" => \&git_project_list,
 497         "project_index" => \&git_project_index,
 498 );
 499
 500 # finally, we have the hash of allowed extra_options for the commands that
 501 # allow them
 502 my %allowed_options = (
 503         "--no-merges" => [ qw(rss atom log shortlog history) ],
 504 );
 505
 506 # fill %input_params with the CGI parameters. All values except for 'opt'
 507 # should be single values, but opt can be an array. We should probably
 508 # build an array of parameters that can be multi-valued, but since for the time
 509 # being it's only this one, we just single it out
 510 while (my ($name, $symbol) = each %cgi_param_mapping) {
 511         if ($symbol eq 'opt') {
 512                 $input_params{$name} = [ $cgi->param($symbol) ];
 513         } else {
 514                 $input_params{$name} = $cgi->param($symbol);
 515         }
 516 }
 517
 518 # now read PATH_INFO and update the parameter list for missing parameters
 519 sub evaluate_path_info {
 520         return if defined $input_params{'project'};
 521         return if !$path_info;
 522         $path_info =~ s,^/+,,;
 523         return if !$path_info;
 524
 525         # find which part of PATH_INFO is project
 526         my $project = $path_info;
 527         $project =~ s,/+$,,;
 528         while ($project && !check_head_link("$projectroot/$project")) {
 529                 $project =~ s,/*[^/]*$,,;
 530         }
 531         return unless $project;
 532         $input_params{'project'} = $project;
 533
 534         # do not change any parameters if an action is given using the query string
 535         return if $input_params{'action'};
 536         $path_info =~ s,^\Q$project\E/*,,;
 537
 538         my ($refname, $pathname) = split(/:/, $path_info, 2);
 539         if (defined $pathname) {
 540                 # we got "project.git/branch:filename" or "project.git/branch:dir/"
 541                 # we could use git_get_type(branch:pathname), but it needs $git_dir
 542                 $pathname =~ s,^/+,,;
 543                 if (!$pathname || substr($pathname, -1) eq "/") {
 544                         $input_params{'action'} = "tree";
 545                         $pathname =~ s,/$,,;
 546                 } else {
 547                         $input_params{'action'} = "blob_plain";
 548                 }
 549                 $input_params{'hash_base'} ||= $refname;
 550                 $input_params{'file_name'} ||= $pathname;
 551         } elsif (defined $refname) {
 552                 # we got "project.git/branch"
 553                 $input_params{'action'} = "shortlog";
 554                 $input_params{'hash'} ||= $refname;
 555         }
 556 }
 557 evaluate_path_info();
 558
 559 our $action = $input_params{'action'};
 560 if (defined $action) {
 561         if (!validate_action($action)) {
 562                 die_error(400, "Invalid action parameter");
 563         }
 564 }
 565
 566 # parameters which are pathnames
 567 our $project = $input_params{'project'};
 568 if (defined $project) {
 569         if (!validate_project($project)) {
 570                 undef $project;
 571                 die_error(404, "No such project");
 572         }
 573 }
 574
 575 our $file_name = $input_params{'file_name'};
 576 if (defined $file_name) {
 577         if (!validate_pathname($file_name)) {
 578                 die_error(400, "Invalid file parameter");
 579         }
 580 }
 581
 582 our $file_parent = $input_params{'file_parent'};
 583 if (defined $file_parent) {
 584         if (!validate_pathname($file_parent)) {
 585                 die_error(400, "Invalid file parent parameter");
 586         }
 587 }
 588
 589 # parameters which are refnames
 590 our $hash = $input_params{'hash'};
 591 if (defined $hash) {
 592         if (!validate_refname($hash)) {
 593                 die_error(400, "Invalid hash parameter");
 594         }
 595 }
 596
 597 our $hash_parent = $input_params{'hash_parent'};
 598 if (defined $hash_parent) {
 599         if (!validate_refname($hash_parent)) {
 600                 die_error(400, "Invalid hash parent parameter");
 601         }
 602 }
 603
 604 our $hash_base = $input_params{'hash_base'};
 605 if (defined $hash_base) {
 606         if (!validate_refname($hash_base)) {
 607                 die_error(400, "Invalid hash base parameter");
 608         }
 609 }
 610
 611 our @extra_options = @{$input_params{'extra_options'}};
 612 # @extra_options is always defined, since it can only be (currently) set from
 613 # CGI, and $cgi->param() returns the empty array in array context if the param
 614 # is not set
 615 foreach my $opt (@extra_options) {
 616         if (not exists $allowed_options{$opt}) {
 617                 die_error(400, "Invalid option parameter");
 618         }
 619         if (not grep(/^$action$/, @{$allowed_options{$opt}})) {
 620                 die_error(400, "Invalid option parameter for this action");
 621         }
 622 }
 623
 624 our $hash_parent_base = $input_params{'hash_parent_base'};
 625 if (defined $hash_parent_base) {
 626         if (!validate_refname($hash_parent_base)) {
 627                 die_error(400, "Invalid hash parent base parameter");
 628         }
 629 }
 630
 631 # other parameters
 632 our $page = $input_params{'page'};
 633 if (defined $page) {
 634         if ($page =~ m/[^0-9]/) {
 635                 die_error(400, "Invalid page parameter");
 636         }
 637 }
 638
 639 our $searchtype = $input_params{'searchtype'};
 640 if (defined $searchtype) {
 641         if ($searchtype =~ m/[^a-z]/) {
 642                 die_error(400, "Invalid searchtype parameter");
 643         }
 644 }
 645
 646 our $search_use_regexp = $input_params{'search_use_regexp'};
 647
 648 our $searchtext = $input_params{'searchtext'};
 649 our $search_regexp;
 650 if (defined $searchtext) {
 651         if (length($searchtext) < 2) {
 652                 die_error(403, "At least two characters are required for search parameter");
 653         }
 654         $search_regexp = $search_use_regexp ? $searchtext : quotemeta $searchtext;
 655 }
 656
 657 # path to the current git repository
 658 our $git_dir;
 659 $git_dir = "$projectroot/$project" if $project;
 660
 661 # dispatch
 662 if (!defined $action) {
 663         if (defined $hash) {
 664                 $action = git_get_type($hash);
 665         } elsif (defined $hash_base && defined $file_name) {
 666                 $action = git_get_type("$hash_base:$file_name");
 667         } elsif (defined $project) {
 668                 $action = 'summary';
 669         } else {
 670                 $action = 'project_list';
 671         }
 672 }
 673 if (!defined($actions{$action})) {
 674         die_error(400, "Unknown action");
 675 }
 676 if ($action !~ m/^(opml|project_list|project_index)$/ &&
 677     !$project) {
 678         die_error(400, "Project needed");
 679 }
 680 $actions{$action}->();
 681 exit;
 682
 683 ## ======================================================================
 684 ## action links
 685
 686 sub href (%) {
 687         my %params = @_;
 688         # default is to use -absolute url() i.e. $my_uri
 689         my $href = $params{-full} ? $my_url : $my_uri;
 690
 691         $params{'project'} = $project unless exists $params{'project'};
 692
 693         if ($params{-replay}) {
 694                 while (my ($name, $symbol) = each %cgi_param_mapping) {
 695                         if (!exists $params{$name}) {
 696                                 $params{$name} = $input_params{$name};
 697                         }
 698                 }
 699         }
 700
 701         my ($use_pathinfo) = gitweb_check_feature('pathinfo');
 702         if ($use_pathinfo) {
 703                 # use PATH_INFO for project name
 704                 $href .= "/".esc_url($params{'project'}) if defined $params{'project'};
 705                 delete $params{'project'};
 706
 707                 # Summary just uses the project path URL
 708                 if (defined $params{'action'} && $params{'action'} eq 'summary') {
 709                         delete $params{'action'};
 710                 }
 711         }
 712
 713         # now encode the parameters explicitly
 714         my @result = ();
 715         for (my $i = 0; $i < @cgi_param_mapping; $i += 2) {
 716                 my ($name, $symbol) = ($cgi_param_mapping[$i], $cgi_param_mapping[$i+1]);
 717                 if (defined $params{$name}) {
 718                         if (ref($params{$name}) eq "ARRAY") {
 719                                 foreach my $par (@{$params{$name}}) {
 720                                         push @result, $symbol . "=" . esc_param($par);
 721                                 }
 722                         } else {
 723                                 push @result, $symbol . "=" . esc_param($params{$name});
 724                         }
 725                 }
 726         }
 727         $href .= "?" . join(';', @result) if scalar @result;
 728
 729         return $href;
 730 }
 731
 732
 733 ## ======================================================================
 734 ## validation, quoting/unquoting and escaping
 735
 736 sub validate_action {
 737         my $input = shift || return undef;
 738         return undef unless exists $actions{$input};
 739         return $input;
 740 }
 741
 742 sub validate_project {
 743         my $input = shift || return undef;
 744         if (!validate_pathname($input) ||
 745                 !(-d "$projectroot/$input") ||
 746                 !check_head_link("$projectroot/$input") ||
 747                 ($export_ok && !(-e "$projectroot/$input/$export_ok")) ||
 748                 ($strict_export && !project_in_list($input))) {
 749                 return undef;
 750         } else {
 751                 return $input;
 752         }
 753 }
 754
 755 sub validate_pathname {
 756         my $input = shift || return undef;
 757
 758         # no '.' or '..' as elements of path, i.e. no '.' nor '..'
 759         # at the beginning, at the end, and between slashes.
 760         # also this catches doubled slashes
 761         if ($input =~ m!(^|/)(|\.|\.\.)(/|$)!) {
 762                 return undef;
 763         }
 764         # no null characters
 765         if ($input =~ m!\0!) {
 766                 return undef;
 767         }
 768         return $input;
 769 }
 770
 771 sub validate_refname {
 772         my $input = shift || return undef;
 773
 774         # textual hashes are O.K.
 775         if ($input =~ m/^[0-9a-fA-F]{40}$/) {
 776                 return $input;
 777         }
 778         # it must be correct pathname
 779         $input = validate_pathname($input)
 780                 or return undef;
 781         # restrictions on ref name according to git-check-ref-format
 782         if ($input =~ m!(/\.|\.\.|[\000-\040\177 ~^:?*\[]|/$)!) {
 783                 return undef;
 784         }
 785         return $input;
 786 }
 787
 788 # decode sequences of octets in utf8 into Perl's internal form,
 789 # which is utf-8 with utf8 flag set if needed.  gitweb writes out
 790 # in utf-8 thanks to "binmode STDOUT, ':utf8'" at beginning
 791 sub to_utf8 {
 792         my $str = shift;
 793         if (utf8::valid($str)) {
 794                 utf8::decode($str);
 795                 return $str;
 796         } else {
 797                 return decode($fallback_encoding, $str, Encode::FB_DEFAULT);
 798         }
 799 }
 800
 801 # quote unsafe chars, but keep the slash, even when it's not
 802 # correct, but quoted slashes look too horrible in bookmarks
 803 sub esc_param {
 804         my $str = shift;
 805         $str =~ s/([^A-Za-z0-9\-_.~()\/:@])/sprintf("%%%02X", ord($1))/eg;
 806         $str =~ s/\+/%2B/g;
 807         $str =~ s/ /\+/g;
 808         return $str;
 809 }
 810
 811 # quote unsafe chars in whole URL, so some charactrs cannot be quoted
 812 sub esc_url {
 813         my $str = shift;
 814         $str =~ s/([^A-Za-z0-9\-_.~();\/;?:@&=])/sprintf("%%%02X", ord($1))/eg;
 815         $str =~ s/\+/%2B/g;
 816         $str =~ s/ /\+/g;
 817         return $str;
 818 }
 819
 820 # replace invalid utf8 character with SUBSTITUTION sequence
 821 sub esc_html ($;%) {
 822         my $str = shift;
 823         my %opts = @_;
 824
 825         $str = to_utf8($str);
 826         $str = $cgi->escapeHTML($str);
 827         if ($opts{'-nbsp'}) {
 828                 $str =~ s/ /&nbsp;/g;
 829         }
 830         $str =~ s|([[:cntrl:]])|(($1 ne "\t") ? quot_cec($1) : $1)|eg;
 831         return $str;
 832 }
 833
 834 # quote control characters and escape filename to HTML
 835 sub esc_path {
 836         my $str = shift;
 837         my %opts = @_;
 838
 839         $str = to_utf8($str);
 840         $str = $cgi->escapeHTML($str);
 841         if ($opts{'-nbsp'}) {
 842                 $str =~ s/ /&nbsp;/g;
 843         }
 844         $str =~ s|([[:cntrl:]])|quot_cec($1)|eg;
 845         return $str;
 846 }
 847
 848 # Make control characters "printable", using character escape codes (CEC)
 849 sub quot_cec {
 850         my $cntrl = shift;
 851         my %opts = @_;
 852         my %es = ( # character escape codes, aka escape sequences
 853                 "\t" => '\t',   # tab            (HT)
 854                 "\n" => '\n',   # line feed      (LF)
 855                 "\r" => '\r',   # carrige return (CR)
 856                 "\f" => '\f',   # form feed      (FF)
 857                 "\b" => '\b',   # backspace      (BS)
 858                 "\a" => '\a',   # alarm (bell)   (BEL)
 859                 "\e" => '\e',   # escape         (ESC)
 860                 "\013" => '\v', # vertical tab   (VT)
 861                 "\000" => '\0', # nul character  (NUL)
 862         );
 863         my $chr = ( (exists $es{$cntrl})
 864                     ? $es{$cntrl}
 865                     : sprintf('\%2x', ord($cntrl)) );
 866         if ($opts{-nohtml}) {
 867                 return $chr;
 868         } else {
 869                 return "<span class=\"cntrl\">$chr</span>";
 870         }
 871 }
 872
 873 # Alternatively use unicode control pictures codepoints,
 874 # Unicode "printable representation" (PR)
 875 sub quot_upr {
 876         my $cntrl = shift;
 877         my %opts = @_;
 878
 879         my $chr = sprintf('&#%04d;', 0x2400+ord($cntrl));
 880         if ($opts{-nohtml}) {
 881                 return $chr;
 882         } else {
 883                 return "<span class=\"cntrl\">$chr</span>";
 884         }
 885 }
 886
 887 # git may return quoted and escaped filenames
 888 sub unquote {
 889         my $str = shift;
 890
 891         sub unq {
 892                 my $seq = shift;
 893                 my %es = ( # character escape codes, aka escape sequences
 894                         't' => "\t",   # tab            (HT, TAB)
 895                         'n' => "\n",   # newline        (NL)
 896                         'r' => "\r",   # return         (CR)
 897                         'f' => "\f",   # form feed      (FF)
 898                         'b' => "\b",   # backspace      (BS)
 899                         'a' => "\a",   # alarm (bell)   (BEL)
 900                         'e' => "\e",   # escape         (ESC)
 901                         'v' => "\013", # vertical tab   (VT)
 902                 );
 903
 904                 if ($seq =~ m/^[0-7]{1,3}$/) {
 905                         # octal char sequence
 906                         return chr(oct($seq));
 907                 } elsif (exists $es{$seq}) {
 908                         # C escape sequence, aka character escape code
 909                         return $es{$seq};
 910                 }
 911                 # quoted ordinary character
 912                 return $seq;
 913         }
 914
 915         if ($str =~ m/^"(.*)"$/) {
 916                 # needs unquoting
 917                 $str = $1;
 918                 $str =~ s/\\([^0-7]|[0-7]{1,3})/unq($1)/eg;
 919         }
 920         return $str;
 921 }
 922
 923 # escape tabs (convert tabs to spaces)
 924 sub untabify {
 925         my $line = shift;
 926
 927         while ((my $pos = index($line, "\t")) != -1) {
 928                 if (my $count = (8 - ($pos % 8))) {
 929                         my $spaces = ' ' x $count;
 930                         $line =~ s/\t/$spaces/;
 931                 }
 932         }
 933
 934         return $line;
 935 }
 936
 937 sub project_in_list {
 938         my $project = shift;
 939         my @list = git_get_projects_list();
 940         return @list && scalar(grep { $_->{'path'} eq $project } @list);
 941 }
 942
 943 ## ----------------------------------------------------------------------
 944 ## HTML aware string manipulation
 945
 946 # Try to chop given string on a word boundary between position
 947 # $len and $len+$add_len. If there is no word boundary there,
 948 # chop at $len+$add_len. Do not chop if chopped part plus ellipsis
 949 # (marking chopped part) would be longer than given string.
 950 sub chop_str {
 951         my $str = shift;
 952         my $len = shift;
 953         my $add_len = shift || 10;
 954         my $where = shift || 'right'; # 'left' | 'center' | 'right'
 955
 956         # Make sure perl knows it is utf8 encoded so we don't
 957         # cut in the middle of a utf8 multibyte char.
 958         $str = to_utf8($str);
 959
 960         # allow only $len chars, but don't cut a word if it would fit in $add_len
 961         # if it doesn't fit, cut it if it's still longer than the dots we would add
 962         # remove chopped character entities entirely
 963
 964         # when chopping in the middle, distribute $len into left and right part
 965         # return early if chopping wouldn't make string shorter
 966         if ($where eq 'center') {
 967                 return $str if ($len + 5 >= length($str)); # filler is length 5
 968                 $len = int($len/2);
 969         } else {
 970                 return $str if ($len + 4 >= length($str)); # filler is length 4
 971         }
 972
 973         # regexps: ending and beginning with word part up to $add_len
 974         my $endre = qr/.{$len}\w{0,$add_len}/;
 975         my $begre = qr/\w{0,$add_len}.{$len}/;
 976
 977         if ($where eq 'left') {
 978                 $str =~ m/^(.*?)($begre)$/;
 979                 my ($lead, $body) = ($1, $2);
 980                 if (length($lead) > 4) {
 981                         $body =~ s/^[^;]*;// if ($lead =~ m/&[^;]*$/);
 982                         $lead = " ...";
 983                 }
 984                 return "$lead$body";
 985
 986         } elsif ($where eq 'center') {
 987                 $str =~ m/^($endre)(.*)$/;
 988                 my ($left, $str)  = ($1, $2);
 989                 $str =~ m/^(.*?)($begre)$/;
 990                 my ($mid, $right) = ($1, $2);
 991                 if (length($mid) > 5) {
 992                         $left  =~ s/&[^;]*$//;
 993                         $right =~ s/^[^;]*;// if ($mid =~ m/&[^;]*$/);
 994                         $mid = " ... ";
 995                 }
 996                 return "$left$mid$right";
 997
 998         } else {
 999                 $str =~ m/^($endre)(.*)$/;
1000                 my $body = $1;
1001                 my $tail = $2;
1002                 if (length($tail) > 4) {
1003                         $body =~ s/&[^;]*$//;
1004                         $tail = "... ";
1005                 }
1006                 return "$body$tail";
1007         }
1008 }
1009
1010 # takes the same arguments as chop_str, but also wraps a <span> around the
1011 # result with a title attribute if it does get chopped. Additionally, the
1012 # string is HTML-escaped.
1013 sub chop_and_escape_str {
1014         my ($str) = @_;
1015
1016         my $chopped = chop_str(@_);
1017         if ($chopped eq $str) {
1018                 return esc_html($chopped);
1019         } else {
1020                 $str =~ s/([[:cntrl:]])/?/g;
1021                 return $cgi->span({-title=>$str}, esc_html($chopped));
1022         }
1023 }
1024
1025 ## ----------------------------------------------------------------------
1026 ## functions returning short strings
1027
1028 # CSS class for given age value (in seconds)
1029 sub age_class {
1030         my $age = shift;
1031
1032         if (!defined $age) {
1033                 return "noage";
1034         } elsif ($age < 60*60*2) {
1035                 return "age0";
1036         } elsif ($age < 60*60*24*2) {
1037                 return "age1";
1038         } else {
1039                 return "age2";
1040         }
1041 }
1042
1043 # convert age in seconds to "nn units ago" string
1044 sub age_string {
1045         my $age = shift;
1046         my $age_str;
1047
1048         if ($age > 60*60*24*365*2) {
1049                 $age_str = (int $age/60/60/24/365);
1050                 $age_str .= " years ago";
1051         } elsif ($age > 60*60*24*(365/12)*2) {
1052                 $age_str = int $age/60/60/24/(365/12);
1053                 $age_str .= " months ago";
1054         } elsif ($age > 60*60*24*7*2) {
1055                 $age_str = int $age/60/60/24/7;
1056                 $age_str .= " weeks ago";
1057         } elsif ($age > 60*60*24*2) {
1058                 $age_str = int $age/60/60/24;
1059                 $age_str .= " days ago";
1060         } elsif ($age > 60*60*2) {
1061                 $age_str = int $age/60/60;
1062                 $age_str .= " hours ago";
1063         } elsif ($age > 60*2) {
1064                 $age_str = int $age/60;
1065                 $age_str .= " min ago";
1066         } elsif ($age > 2) {
1067                 $age_str = int $age;
1068                 $age_str .= " sec ago";
1069         } else {
1070                 $age_str .= " right now";
1071         }
1072         return $age_str;
1073 }
1074
1075 use constant {
1076         S_IFINVALID => 0030000,
1077         S_IFGITLINK => 0160000,
1078 };
1079
1080 # submodule/subproject, a commit object reference
1081 sub S_ISGITLINK($) {
1082         my $mode = shift;
1083
1084         return (($mode & S_IFMT) == S_IFGITLINK)
1085 }
1086
1087 # convert file mode in octal to symbolic file mode string
1088 sub mode_str {
1089         my $mode = oct shift;
1090
1091         if (S_ISGITLINK($mode)) {
1092                 return 'm---------';
1093         } elsif (S_ISDIR($mode & S_IFMT)) {
1094                 return 'drwxr-xr-x';
1095         } elsif (S_ISLNK($mode)) {
1096                 return 'lrwxrwxrwx';
1097         } elsif (S_ISREG($mode)) {
1098                 # git cares only about the executable bit
1099                 if ($mode & S_IXUSR) {
1100                         return '-rwxr-xr-x';
1101                 } else {
1102                         return '-rw-r--r--';
1103                 };
1104         } else {
1105                 return '----------';
1106         }
1107 }
1108
1109 # convert file mode in octal to file type string
1110 sub file_type {
1111         my $mode = shift;
1112
1113         if ($mode !~ m/^[0-7]+$/) {
1114                 return $mode;
1115         } else {
1116                 $mode = oct $mode;
1117         }
1118
1119         if (S_ISGITLINK($mode)) {
1120                 return "submodule";
1121         } elsif (S_ISDIR($mode & S_IFMT)) {
1122                 return "directory";
1123         } elsif (S_ISLNK($mode)) {
1124                 return "symlink";
1125         } elsif (S_ISREG($mode)) {
1126                 return "file";
1127         } else {
1128                 return "unknown";
1129         }
1130 }
1131
1132 # convert file mode in octal to file type description string
1133 sub file_type_long {
1134         my $mode = shift;
1135
1136         if ($mode !~ m/^[0-7]+$/) {
1137                 return $mode;
1138         } else {
1139                 $mode = oct $mode;
1140         }
1141
1142         if (S_ISGITLINK($mode)) {
1143                 return "submodule";
1144         } elsif (S_ISDIR($mode & S_IFMT)) {
1145                 return "directory";
1146         } elsif (S_ISLNK($mode)) {
1147                 return "symlink";
1148         } elsif (S_ISREG($mode)) {
1149                 if ($mode & S_IXUSR) {
1150                         return "executable";
1151                 } else {
1152                         return "file";
1153                 };
1154         } else {
1155                 return "unknown";
1156         }
1157 }
1158
1159
1160 ## ----------------------------------------------------------------------
1161 ## functions returning short HTML fragments, or transforming HTML fragments
1162 ## which don't belong to other sections
1163
1164 # format line of commit message.
1165 sub format_log_line_html {
1166         my $line = shift;
1167
1168         $line = esc_html($line, -nbsp=>1);
1169         if ($line =~ m/([0-9a-fA-F]{8,40})/) {
1170                 my $hash_text = $1;
1171                 my $link =
1172                         $cgi->a({-href => href(action=>"object", hash=>$hash_text),
1173                                 -class => "text"}, $hash_text);
1174                 $line =~ s/$hash_text/$link/;
1175         }
1176         return $line;
1177 }
1178
1179 # format marker of refs pointing to given object
1180
1181 # the destination action is chosen based on object type and current context:
1182 # - for annotated tags, we choose the tag view unless it's the current view
1183 #   already, in which case we go to shortlog view
1184 # - for other refs, we keep the current view if we're in history, shortlog or
1185 #   log view, and select shortlog otherwise
1186 sub format_ref_marker {
1187         my ($refs, $id) = @_;
1188         my $markers = '';
1189
1190         if (defined $refs->{$id}) {
1191                 foreach my $ref (@{$refs->{$id}}) {
1192                         # this code exploits the fact that non-lightweight tags are the
1193                         # only indirect objects, and that they are the only objects for which
1194                         # we want to use tag instead of shortlog as action
1195                         my ($type, $name) = qw();
1196                         my $indirect = ($ref =~ s/\^\{\}$//);
1197                         # e.g. tags/v2.6.11 or heads/next
1198                         if ($ref =~ m!^(.*?)s?/(.*)$!) {
1199                                 $type = $1;
1200                                 $name = $2;
1201                         } else {
1202                                 $type = "ref";
1203                                 $name = $ref;
1204                         }
1205
1206                         my $class = $type;
1207                         $class .= " indirect" if $indirect;
1208
1209                         my $dest_action = "shortlog";
1210
1211                         if ($indirect) {
1212                                 $dest_action = "tag" unless $action eq "tag";
1213                         } elsif ($action =~ /^(history|(short)?log)$/) {
1214                                 $dest_action = $action;
1215                         }
1216
1217                         my $dest = "";
1218                         $dest .= "refs/" unless $ref =~ m!^refs/!;
1219                         $dest .= $ref;
1220
1221                         my $link = $cgi->a({
1222                                 -href => href(
1223                                         action=>$dest_action,
1224                                         hash=>$dest
1225                                 )}, $name);
1226
1227                         $markers .= " <span class=\"$class\" title=\"$ref\">" .
1228                                 $link . "</span>";
1229                 }
1230         }
1231
1232         if ($markers) {
1233                 return ' <span class="refs">'. $markers . '</span>';
1234         } else {
1235                 return "";
1236         }
1237 }
1238
1239 # format, perhaps shortened and with markers, title line
1240 sub format_subject_html {
1241         my ($long, $short, $href, $extra) = @_;
1242         $extra = '' unless defined($extra);
1243
1244         if (length($short) < length($long)) {
1245                 return $cgi->a({-href => $href, -class => "list subject",
1246                                 -title => to_utf8($long)},
1247                        esc_html($short) . $extra);
1248         } else {
1249                 return $cgi->a({-href => $href, -class => "list subject"},
1250                        esc_html($long)  . $extra);
1251         }
1252 }
1253
1254 # format git diff header line, i.e. "diff --(git|combined|cc) ..."
1255 sub format_git_diff_header_line {
1256         my $line = shift;
1257         my $diffinfo = shift;
1258         my ($from, $to) = @_;
1259
1260         if ($diffinfo->{'nparents'}) {
1261                 # combined diff
1262                 $line =~ s!^(diff (.*?) )"?.*$!$1!;
1263                 if ($to->{'href'}) {
1264                         $line .= $cgi->a({-href => $to->{'href'}, -class => "path"},
1265                                          esc_path($to->{'file'}));
1266                 } else { # file was deleted (no href)
1267                         $line .= esc_path($to->{'file'});
1268                 }
1269         } else {
1270                 # "ordinary" diff
1271                 $line =~ s!^(diff (.*?) )"?a/.*$!$1!;
1272                 if ($from->{'href'}) {
1273                         $line .= $cgi->a({-href => $from->{'href'}, -class => "path"},
1274                                          'a/' . esc_path($from->{'file'}));
1275                 } else { # file was added (no href)
1276                         $line .= 'a/' . esc_path($from->{'file'});
1277                 }
1278                 $line .= ' ';
1279                 if ($to->{'href'}) {
1280                         $line .= $cgi->a({-href => $to->{'href'}, -class => "path"},
1281                                          'b/' . esc_path($to->{'file'}));
1282                 } else { # file was deleted
1283                         $line .= 'b/' . esc_path($to->{'file'});
1284                 }
1285         }
1286
1287         return "<div class=\"diff header\">$line</div>\n";
1288 }
1289
1290 # format extended diff header line, before patch itself
1291 sub format_extended_diff_header_line {
1292         my $line = shift;
1293         my $diffinfo = shift;
1294         my ($from, $to) = @_;
1295
1296         # match <path>
1297         if ($line =~ s!^((copy|rename) from ).*$!$1! && $from->{'href'}) {
1298                 $line .= $cgi->a({-href=>$from->{'href'}, -class=>"path"},
1299                                        esc_path($from->{'file'}));
1300         }
1301         if ($line =~ s!^((copy|rename) to ).*$!$1! && $to->{'href'}) {
1302                 $line .= $cgi->a({-href=>$to->{'href'}, -class=>"path"},
1303                                  esc_path($to->{'file'}));
1304         }
1305         # match single <mode>
1306         if ($line =~ m/\s(\d{6})$/) {
1307                 $line .= '<span class="info"> (' .
1308                          file_type_long($1) .
1309                          ')</span>';
1310         }
1311         # match <hash>
1312         if ($line =~ m/^index [0-9a-fA-F]{40},[0-9a-fA-F]{40}/) {
1313                 # can match only for combined diff
1314                 $line = 'index ';
1315                 for (my $i = 0; $i < $diffinfo->{'nparents'}; $i++) {
1316                         if ($from->{'href'}[$i]) {
1317                                 $line .= $cgi->a({-href=>$from->{'href'}[$i],
1318                                                   -class=>"hash"},
1319                                                  substr($diffinfo->{'from_id'}[$i],0,7));
1320                         } else {
1321                                 $line .= '0' x 7;
1322                         }
1323                         # separator
1324                         $line .= ',' if ($i < $diffinfo->{'nparents'} - 1);
1325                 }
1326                 $line .= '..';
1327                 if ($to->{'href'}) {
1328                         $line .= $cgi->a({-href=>$to->{'href'}, -class=>"hash"},
1329                                          substr($diffinfo->{'to_id'},0,7));
1330                 } else {
1331                         $line .= '0' x 7;
1332                 }
1333
1334         } elsif ($line =~ m/^index [0-9a-fA-F]{40}..[0-9a-fA-F]{40}/) {
1335                 # can match only for ordinary diff
1336                 my ($from_link, $to_link);
1337                 if ($from->{'href'}) {
1338                         $from_link = $cgi->a({-href=>$from->{'href'}, -class=>"hash"},
1339                                              substr($diffinfo->{'from_id'},0,7));
1340                 } else {
1341                         $from_link = '0' x 7;
1342                 }
1343                 if ($to->{'href'}) {
1344                         $to_link = $cgi->a({-href=>$to->{'href'}, -class=>"hash"},
1345                                            substr($diffinfo->{'to_id'},0,7));
1346                 } else {
1347                         $to_link = '0' x 7;
1348                 }
1349                 my ($from_id, $to_id) = ($diffinfo->{'from_id'}, $diffinfo->{'to_id'});
1350                 $line =~ s!$from_id\.\.$to_id!$from_link..$to_link!;
1351         }
1352
1353         return $line . "<br/>\n";
1354 }
1355
1356 # format from-file/to-file diff header
1357 sub format_diff_from_to_header {
1358         my ($from_line, $to_line, $diffinfo, $from, $to, @parents) = @_;
1359         my $line;
1360         my $result = '';
1361
1362         $line = $from_line;
1363         #assert($line =~ m/^---/) if DEBUG;
1364         # no extra formatting for "^--- /dev/null"
1365         if (! $diffinfo->{'nparents'}) {
1366                 # ordinary (single parent) diff
1367                 if ($line =~ m!^--- "?a/!) {
1368                         if ($from->{'href'}) {
1369                                 $line = '--- a/' .
1370                                         $cgi->a({-href=>$from->{'href'}, -class=>"path"},
1371                                                 esc_path($from->{'file'}));
1372                         } else {
1373                                 $line = '--- a/' .
1374                                         esc_path($from->{'file'});
1375                         }
1376                 }
1377                 $result .= qq!<div class="diff from_file">$line</div>\n!;
1378
1379         } else {
1380                 # combined diff (merge commit)
1381                 for (my $i = 0; $i < $diffinfo->{'nparents'}; $i++) {
1382                         if ($from->{'href'}[$i]) {
1383                                 $line = '--- ' .
1384                                         $cgi->a({-href=>href(action=>"blobdiff",
1385                                                              hash_parent=>$diffinfo->{'from_id'}[$i],
1386                                                              hash_parent_base=>$parents[$i],
1387                                                              file_parent=>$from->{'file'}[$i],
1388                                                              hash=>$diffinfo->{'to_id'},
1389                                                              hash_base=>$hash,
1390                                                              file_name=>$to->{'file'}),
1391                                                  -class=>"path",
1392                                                  -title=>"diff" . ($i+1)},
1393                                                 $i+1) .
1394                                         '/' .
1395                                         $cgi->a({-href=>$from->{'href'}[$i], -class=>"path"},
1396                                                 esc_path($from->{'file'}[$i]));
1397                         } else {
1398                                 $line = '--- /dev/null';
1399                         }
1400                         $result .= qq!<div class="diff from_file">$line</div>\n!;
1401                 }
1402         }
1403
1404         $line = $to_line;
1405         #assert($line =~ m/^\+\+\+/) if DEBUG;
1406         # no extra formatting for "^+++ /dev/null"
1407         if ($line =~ m!^\+\+\+ "?b/!) {
1408                 if ($to->{'href'}) {
1409                         $line = '+++ b/' .
1410                                 $cgi->a({-href=>$to->{'href'}, -class=>"path"},
1411                                         esc_path($to->{'file'}));
1412                 } else {
1413                         $line = '+++ b/' .
1414                                 esc_path($to->{'file'});
1415                 }
1416         }
1417         $result .= qq!<div class="diff to_file">$line</div>\n!;
1418
1419         return $result;
1420 }
1421
1422 # create note for patch simplified by combined diff
1423 sub format_diff_cc_simplified {
1424         my ($diffinfo, @parents) = @_;
1425         my $result = '';
1426
1427         $result .= "<div class=\"diff header\">" .
1428                    "diff --cc ";
1429         if (!is_deleted($diffinfo)) {
1430                 $result .= $cgi->a({-href => href(action=>"blob",
1431                                                   hash_base=>$hash,
1432                                                   hash=>$diffinfo->{'to_id'},
1433                                                   file_name=>$diffinfo->{'to_file'}),
1434                                     -class => "path"},
1435                                    esc_path($diffinfo->{'to_file'}));
1436         } else {
1437                 $result .= esc_path($diffinfo->{'to_file'});
1438         }
1439         $result .= "</div>\n" . # class="diff header"
1440                    "<div class=\"diff nodifferences\">" .
1441                    "Simple merge" .
1442                    "</div>\n"; # class="diff nodifferences"
1443
1444         return $result;
1445 }
1446
1447 # format patch (diff) line (not to be used for diff headers)
1448 sub format_diff_line {
1449         my $line = shift;
1450         my ($from, $to) = @_;
1451         my $diff_class = "";
1452
1453         chomp $line;
1454
1455         if ($from && $to && ref($from->{'href'}) eq "ARRAY") {
1456                 # combined diff
1457                 my $prefix = substr($line, 0, scalar @{$from->{'href'}});
1458                 if ($line =~ m/^\@{3}/) {
1459                         $diff_class = " chunk_header";
1460                 } elsif ($line =~ m/^\\/) {
1461                         $diff_class = " incomplete";
1462                 } elsif ($prefix =~ tr/+/+/) {
1463                         $diff_class = " add";
1464                 } elsif ($prefix =~ tr/-/-/) {
1465                         $diff_class = " rem";
1466                 }
1467         } else {
1468                 # assume ordinary diff
1469                 my $char = substr($line, 0, 1);
1470                 if ($char eq '+') {
1471                         $diff_class = " add";
1472                 } elsif ($char eq '-') {
1473                         $diff_class = " rem";
1474                 } elsif ($char eq '@') {
1475                         $diff_class = " chunk_header";
1476                 } elsif ($char eq "\\") {
1477                         $diff_class = " incomplete";
1478                 }
1479         }
1480         $line = untabify($line);
1481         if ($from && $to && $line =~ m/^\@{2} /) {
1482                 my ($from_text, $from_start, $from_lines, $to_text, $to_start, $to_lines, $section) =
1483                         $line =~ m/^\@{2} (-(\d+)(?:,(\d+))?) (\+(\d+)(?:,(\d+))?) \@{2}(.*)$/;
1484
1485                 $from_lines = 0 unless defined $from_lines;
1486                 $to_lines   = 0 unless defined $to_lines;
1487
1488                 if ($from->{'href'}) {
1489                         $from_text = $cgi->a({-href=>"$from->{'href'}#l$from_start",
1490                                              -class=>"list"}, $from_text);
1491                 }
1492                 if ($to->{'href'}) {
1493                         $to_text   = $cgi->a({-href=>"$to->{'href'}#l$to_start",
1494                                              -class=>"list"}, $to_text);
1495                 }
1496                 $line = "<span class=\"chunk_info\">@@ $from_text $to_text @@</span>" .
1497                         "<span class=\"section\">" . esc_html($section, -nbsp=>1) . "</span>";
1498                 return "<div class=\"diff$diff_class\">$line</div>\n";
1499         } elsif ($from && $to && $line =~ m/^\@{3}/) {
1500                 my ($prefix, $ranges, $section) = $line =~ m/^(\@+) (.*?) \@+(.*)$/;
1501                 my (@from_text, @from_start, @from_nlines, $to_text, $to_start, $to_nlines);
1502
1503                 @from_text = split(' ', $ranges);
1504                 for (my $i = 0; $i < @from_text; ++$i) {
1505                         ($from_start[$i], $from_nlines[$i]) =
1506                                 (split(',', substr($from_text[$i], 1)), 0);
1507                 }
1508
1509                 $to_text   = pop @from_text;
1510                 $to_start  = pop @from_start;
1511                 $to_nlines = pop @from_nlines;
1512
1513                 $line = "<span class=\"chunk_info\">$prefix ";
1514                 for (my $i = 0; $i < @from_text; ++$i) {
1515                         if ($from->{'href'}[$i]) {
1516                                 $line .= $cgi->a({-href=>"$from->{'href'}[$i]#l$from_start[$i]",
1517                                                   -class=>"list"}, $from_text[$i]);
1518                         } else {
1519                                 $line .= $from_text[$i];
1520                         }
1521                         $line .= " ";
1522                 }
1523                 if ($to->{'href'}) {
1524                         $line .= $cgi->a({-href=>"$to->{'href'}#l$to_start",
1525                                           -class=>"list"}, $to_text);
1526                 } else {
1527                         $line .= $to_text;
1528                 }
1529                 $line .= " $prefix</span>" .
1530                          "<span class=\"section\">" . esc_html($section, -nbsp=>1) . "</span>";
1531                 return "<div class=\"diff$diff_class\">$line</div>\n";
1532         }
1533         return "<div class=\"diff$diff_class\">" . esc_html($line, -nbsp=>1) . "</div>\n";
1534 }
1535
1536 # Generates undef or something like "_snapshot_" or "snapshot (_tbz2_ _zip_)",
1537 # linked.  Pass the hash of the tree/commit to snapshot.
1538 sub format_snapshot_links {
1539         my ($hash) = @_;
1540         my @snapshot_fmts = gitweb_check_feature('snapshot');
1541         @snapshot_fmts = filter_snapshot_fmts(@snapshot_fmts);
1542         my $num_fmts = @snapshot_fmts;
1543         if ($num_fmts > 1) {
1544                 # A parenthesized list of links bearing format names.
1545                 # e.g. "snapshot (_tar.gz_ _zip_)"
1546                 return "snapshot (" . join(' ', map
1547                         $cgi->a({
1548                                 -href => href(
1549                                         action=>"snapshot",
1550                                         hash=>$hash,
1551                                         snapshot_format=>$_
1552                                 )
1553                         }, $known_snapshot_formats{$_}{'display'})
1554                 , @snapshot_fmts) . ")";
1555         } elsif ($num_fmts == 1) {
1556                 # A single "snapshot" link whose tooltip bears the format name.
1557                 # i.e. "_snapshot_"
1558                 my ($fmt) = @snapshot_fmts;
1559                 return
1560                         $cgi->a({
1561                                 -href => href(
1562                                         action=>"snapshot",
1563                                         hash=>$hash,
1564                                         snapshot_format=>$fmt
1565                                 ),
1566                                 -title => "in format: $known_snapshot_formats{$fmt}{'display'}"
1567                         }, "snapshot");
1568         } else { # $num_fmts == 0
1569                 return undef;
1570         }
1571 }
1572
1573 ## ......................................................................
1574 ## functions returning values to be passed, perhaps after some
1575 ## transformation, to other functions; e.g. returning arguments to href()
1576
1577 # returns hash to be passed to href to generate gitweb URL
1578 # in -title key it returns description of link
1579 sub get_feed_info {
1580         my $format = shift || 'Atom';
1581         my %res = (action => lc($format));
1582
1583         # feed links are possible only for project views
1584         return unless (defined $project);
1585         # some views should link to OPML, or to generic project feed,
1586         # or don't have specific feed yet (so they should use generic)
1587         return if ($action =~ /^(?:tags|heads|forks|tag|search)$/x);
1588
1589         my $branch;
1590         # branches refs uses 'refs/heads/' prefix (fullname) to differentiate
1591         # from tag links; this also makes possible to detect branch links
1592         if ((defined $hash_base && $hash_base =~ m!^refs/heads/(.*)$!) ||
1593             (defined $hash      && $hash      =~ m!^refs/heads/(.*)$!)) {
1594                 $branch = $1;
1595         }
1596         # find log type for feed description (title)
1597         my $type = 'log';
1598         if (defined $file_name) {
1599                 $type  = "history of $file_name";
1600                 $type .= "/" if ($action eq 'tree');
1601                 $type .= " on '$branch'" if (defined $branch);
1602         } else {
1603                 $type = "log of $branch" if (defined $branch);
1604         }
1605
1606         $res{-title} = $type;
1607         $res{'hash'} = (defined $branch ? "refs/heads/$branch" : undef);
1608         $res{'file_name'} = $file_name;
1609
1610         return %res;
1611 }
1612
1613 ## ----------------------------------------------------------------------
1614 ## git utility subroutines, invoking git commands
1615
1616 # returns path to the core git executable and the --git-dir parameter as list
1617 sub git_cmd {
1618         return $GIT, '--git-dir='.$git_dir;
1619 }
1620
1621 # quote the given arguments for passing them to the shell
1622 # quote_command("command", "arg 1", "arg with ' and ! characters")
1623 # => "'command' 'arg 1' 'arg with '\'' and '\!' characters'"
1624 # Try to avoid using this function wherever possible.
1625 sub quote_command {
1626         return join(' ',
1627                     map( { my $a = $_; $a =~ s/(['!])/'\\$1'/g; "'$a'" } @_ ));
1628 }
1629
1630 # get HEAD ref of given project as hash
1631 sub git_get_head_hash {
1632         my $project = shift;
1633         my $o_git_dir = $git_dir;
1634         my $retval = undef;
1635         $git_dir = "$projectroot/$project";
1636         if (open my $fd, "-|", git_cmd(), "rev-parse", "--verify", "HEAD") {
1637                 my $head = <$fd>;
1638                 close $fd;
1639                 if (defined $head && $head =~ /^([0-9a-fA-F]{40})$/) {
1640                         $retval = $1;
1641                 }
1642         }
1643         if (defined $o_git_dir) {
1644                 $git_dir = $o_git_dir;
1645         }
1646         return $retval;
1647 }
1648
1649 # get type of given object
1650 sub git_get_type {
1651         my $hash = shift;
1652
1653         open my $fd, "-|", git_cmd(), "cat-file", '-t', $hash or return;
1654         my $type = <$fd>;
1655         close $fd or return;
1656         chomp $type;
1657         return $type;
1658 }
1659
1660 # repository configuration
1661 our $config_file = '';
1662 our %config;
1663
1664 # store multiple values for single key as anonymous array reference
1665 # single values stored directly in the hash, not as [ <value> ]
1666 sub hash_set_multi {
1667         my ($hash, $key, $value) = @_;
1668
1669         if (!exists $hash->{$key}) {
1670                 $hash->{$key} = $value;
1671         } elsif (!ref $hash->{$key}) {
1672                 $hash->{$key} = [ $hash->{$key}, $value ];
1673         } else {
1674                 push @{$hash->{$key}}, $value;
1675         }
1676 }
1677
1678 # return hash of git project configuration
1679 # optionally limited to some section, e.g. 'gitweb'
1680 sub git_parse_project_config {
1681         my $section_regexp = shift;
1682         my %config;
1683
1684         local $/ = "\0";
1685
1686         open my $fh, "-|", git_cmd(), "config", '-z', '-l',
1687                 or return;
1688
1689         while (my $keyval = <$fh>) {
1690                 chomp $keyval;
1691                 my ($key, $value) = split(/\n/, $keyval, 2);
1692
1693                 hash_set_multi(\%config, $key, $value)
1694                         if (!defined $section_regexp || $key =~ /^(?:$section_regexp)\./o);
1695         }
1696         close $fh;
1697
1698         return %config;
1699 }
1700
1701 # convert config value to boolean, 'true' or 'false'
1702 # no value, number > 0, 'true' and 'yes' values are true
1703 # rest of values are treated as false (never as error)
1704 sub config_to_bool {
1705         my $val = shift;
1706
1707         # strip leading and trailing whitespace
1708         $val =~ s/^\s+//;
1709         $val =~ s/\s+$//;
1710
1711         return (!defined $val ||               # section.key
1712                 ($val =~ /^\d+$/ && $val) ||   # section.key = 1
1713                 ($val =~ /^(?:true|yes)$/i));  # section.key = true
1714 }
1715
1716 # convert config value to simple decimal number
1717 # an optional value suffix of 'k', 'm', or 'g' will cause the value
1718 # to be multiplied by 1024, 1048576, or 1073741824
1719 sub config_to_int {
1720         my $val = shift;
1721
1722         # strip leading and trailing whitespace
1723         $val =~ s/^\s+//;
1724         $val =~ s/\s+$//;
1725
1726         if (my ($num, $unit) = ($val =~ /^([0-9]*)([kmg])$/i)) {
1727                 $unit = lc($unit);
1728                 # unknown unit is treated as 1
1729                 return $num * ($unit eq 'g' ? 1073741824 :
1730                                $unit eq 'm' ?    1048576 :
1731                                $unit eq 'k' ?       1024 : 1);
1732         }
1733         return $val;
1734 }
1735
1736 # convert config value to array reference, if needed
1737 sub config_to_multi {
1738         my $val = shift;
1739
1740         return ref($val) ? $val : (defined($val) ? [ $val ] : []);
1741 }
1742
1743 sub git_get_project_config {
1744         my ($key, $type) = @_;
1745
1746         # key sanity check
1747         return unless ($key);
1748         $key =~ s/^gitweb\.//;
1749         return if ($key =~ m/\W/);
1750
1751         # type sanity check
1752         if (defined $type) {
1753                 $type =~ s/^--//;
1754                 $type = undef
1755                         unless ($type eq 'bool' || $type eq 'int');
1756         }
1757
1758         # get config
1759         if (!defined $config_file ||
1760             $config_file ne "$git_dir/config") {
1761                 %config = git_parse_project_config('gitweb');
1762                 $config_file = "$git_dir/config";
1763         }
1764
1765         # ensure given type
1766         if (!defined $type) {
1767                 return $config{"gitweb.$key"};
1768         } elsif ($type eq 'bool') {
1769                 # backward compatibility: 'git config --bool' returns true/false
1770                 return config_to_bool($config{"gitweb.$key"}) ? 'true' : 'false';
1771         } elsif ($type eq 'int') {
1772                 return config_to_int($config{"gitweb.$key"});
1773         }
1774         return $config{"gitweb.$key"};
1775 }
1776
1777 # get hash of given path at given ref
1778 sub git_get_hash_by_path {
1779         my $base = shift;
1780         my $path = shift || return undef;
1781         my $type = shift;
1782
1783         $path =~ s,/+$,,;
1784
1785         open my $fd, "-|", git_cmd(), "ls-tree", $base, "--", $path
1786                 or die_error(500, "Open git-ls-tree failed");
1787         my $line = <$fd>;
1788         close $fd or return undef;
1789
1790         if (!defined $line) {
1791                 # there is no tree or hash given by $path at $base
1792                 return undef;
1793         }
1794
1795         #'100644 blob 0fa3f3a66fb6a137f6ec2c19351ed4d807070ffa  panic.c'
1796         $line =~ m/^([0-9]+) (.+) ([0-9a-fA-F]{40})\t/;
1797         if (defined $type && $type ne $2) {
1798                 # type doesn't match
1799                 return undef;
1800         }
1801         return $3;
1802 }
1803
1804 # get path of entry with given hash at given tree-ish (ref)
1805 # used to get 'from' filename for combined diff (merge commit) for renames
1806 sub git_get_path_by_hash {
1807         my $base = shift || return;
1808         my $hash = shift || return;
1809
1810         local $/ = "\0";
1811
1812         open my $fd, "-|", git_cmd(), "ls-tree", '-r', '-t', '-z', $base
1813                 or return undef;
1814         while (my $line = <$fd>) {
1815                 chomp $line;
1816
1817                 #'040000 tree 595596a6a9117ddba9fe379b6b012b558bac8423  gitweb'
1818                 #'100644 blob e02e90f0429be0d2a69b76571101f20b8f75530f  gitweb/README'
1819                 if ($line =~ m/(?:[0-9]+) (?:.+) $hash\t(.+)$/) {
1820                         close $fd;
1821                         return $1;
1822                 }
1823         }
1824         close $fd;
1825         return undef;
1826 }
1827
1828 ## ......................................................................
1829 ## git utility functions, directly accessing git repository
1830
1831 sub git_get_project_description {
1832         my $path = shift;
1833
1834         $git_dir = "$projectroot/$path";
1835         open my $fd, "$git_dir/description"
1836                 or return git_get_project_config('description');
1837         my $descr = <$fd>;
1838         close $fd;
1839         if (defined $descr) {
1840                 chomp $descr;
1841         }
1842         return $descr;
1843 }
1844
1845 sub git_get_project_ctags {
1846         my $path = shift;
1847         my $ctags = {};
1848
1849         $git_dir = "$projectroot/$path";
1850         unless (opendir D, "$git_dir/ctags") {
1851                 return $ctags;
1852         }
1853         foreach (grep { -f $_ } map { "$git_dir/ctags/$_" } readdir(D)) {
1854                 open CT, $_ or next;
1855                 my $val = <CT>;
1856                 chomp $val;
1857                 close CT;
1858                 my $ctag = $_; $ctag =~ s#.*/##;
1859                 $ctags->{$ctag} = $val;
1860         }
1861         closedir D;
1862         $ctags;
1863 }
1864
1865 sub git_populate_project_tagcloud {
1866         my $ctags = shift;
1867
1868         # First, merge different-cased tags; tags vote on casing
1869         my %ctags_lc;
1870         foreach (keys %$ctags) {
1871                 $ctags_lc{lc $_}->{count} += $ctags->{$_};
1872                 if (not $ctags_lc{lc $_}->{topcount}
1873                     or $ctags_lc{lc $_}->{topcount} < $ctags->{$_}) {
1874                         $ctags_lc{lc $_}->{topcount} = $ctags->{$_};
1875                         $ctags_lc{lc $_}->{topname} = $_;
1876                 }
1877         }
1878
1879         my $cloud;
1880         if (eval { require HTML::TagCloud; 1; }) {
1881                 $cloud = HTML::TagCloud->new;
1882                 foreach (sort keys %ctags_lc) {
1883                         # Pad the title with spaces so that the cloud looks
1884                         # less crammed.
1885                         my $title = $ctags_lc{$_}->{topname};
1886                         $title =~ s/ /&nbsp;/g;
1887                         $title =~ s/^/&nbsp;/g;
1888                         $title =~ s/$/&nbsp;/g;
1889                         $cloud->add($title, $home_link."?by_tag=".$_, $ctags_lc{$_}->{count});
1890                 }
1891         } else {
1892                 $cloud = \%ctags_lc;
1893         }
1894         $cloud;
1895 }
1896
1897 sub git_show_project_tagcloud {
1898         my ($cloud, $count) = @_;
1899         print STDERR ref($cloud)."..\n";
1900         if (ref $cloud eq 'HTML::TagCloud') {
1901                 return $cloud->html_and_css($count);
1902         } else {
1903                 my @tags = sort { $cloud->{$a}->{count} <=> $cloud->{$b}->{count} } keys %$cloud;
1904                 return '<p align="center">' . join (', ', map {
1905                         "<a href=\"$home_link?by_tag=$_\">$cloud->{$_}->{topname}</a>"
1906                 } splice(@tags, 0, $count)) . '</p>';
1907         }
1908 }
1909
1910 sub git_get_project_url_list {
1911         my $path = shift;
1912
1913         $git_dir = "$projectroot/$path";
1914         open my $fd, "$git_dir/cloneurl"
1915                 or return wantarray ?
1916                 @{ config_to_multi(git_get_project_config('url')) } :
1917                    config_to_multi(git_get_project_config('url'));
1918         my @git_project_url_list = map { chomp; $_ } <$fd>;
1919         close $fd;
1920
1921         return wantarray ? @git_project_url_list : \@git_project_url_list;
1922 }
1923
1924 sub git_get_projects_list {
1925         my ($filter) = @_;
1926         my @list;
1927
1928         $filter ||= '';
1929         $filter =~ s/\.git$//;
1930
1931         my ($check_forks) = gitweb_check_feature('forks');
1932
1933         if (-d $projects_list) {
1934                 # search in directory
1935                 my $dir = $projects_list . ($filter ? "/$filter" : '');
1936                 # remove the trailing "/"
1937                 $dir =~ s!/+$!!;
1938                 my $pfxlen = length("$dir");
1939                 my $pfxdepth = ($dir =~ tr!/!!);
1940
1941                 File::Find::find({
1942                         follow_fast => 1, # follow symbolic links
1943                         follow_skip => 2, # ignore duplicates
1944                         dangling_symlinks => 0, # ignore dangling symlinks, silently
1945                         wanted => sub {
1946                                 # skip project-list toplevel, if we get it.
1947                                 return if (m!^[/.]$!);
1948                                 # only directories can be git repositories
1949                                 return unless (-d $_);
1950                                 # don't traverse too deep (Find is super slow on os x)
1951                                 if (($File::Find::name =~ tr!/!!) - $pfxdepth > $project_maxdepth) {
1952                                         $File::Find::prune = 1;
1953                                         return;
1954                                 }
1955
1956                                 my $subdir = substr($File::Find::name, $pfxlen + 1);
1957                                 # we check related file in $projectroot
1958                                 if (check_export_ok("$projectroot/$filter/$subdir")) {
1959                                         push @list, { path => ($filter ? "$filter/" : '') . $subdir };
1960                                         $File::Find::prune = 1;
1961                                 }
1962                         },
1963                 }, "$dir");
1964
1965         } elsif (-f $projects_list) {
1966                 # read from file(url-encoded):
1967                 # 'git%2Fgit.git Linus+Torvalds'
1968                 # 'libs%2Fklibc%2Fklibc.git H.+Peter+Anvin'
1969                 # 'linux%2Fhotplug%2Fudev.git Greg+Kroah-Hartman'
1970                 my %paths;
1971                 open my ($fd), $projects_list or return;
1972         PROJECT:
1973                 while (my $line = <$fd>) {
1974                         chomp $line;
1975                         my ($path, $owner) = split ' ', $line;
1976                         $path = unescape($path);
1977                         $owner = unescape($owner);
1978                         if (!defined $path) {
1979                                 next;
1980                         }
1981                         if ($filter ne '') {
1982                                 # looking for forks;
1983                                 my $pfx = substr($path, 0, length($filter));
1984                                 if ($pfx ne $filter) {
1985                                         next PROJECT;
1986                                 }
1987                                 my $sfx = substr($path, length($filter));
1988                                 if ($sfx !~ /^\/.*\.git$/) {
1989                                         next PROJECT;
1990                                 }
1991                         } elsif ($check_forks) {
1992                         PATH:
1993                                 foreach my $filter (keys %paths) {
1994                                         # looking for forks;
1995                                         my $pfx = substr($path, 0, length($filter));
1996                                         if ($pfx ne $filter) {
1997                                                 next PATH;
1998                                         }
1999                                         my $sfx = substr($path, length($filter));
2000                                         if ($sfx !~ /^\/.*\.git$/) {
2001                                                 next PATH;
2002                                         }
2003                                         # is a fork, don't include it in
2004                                         # the list
2005                                         next PROJECT;
2006                                 }
2007                         }
2008                         if (check_export_ok("$projectroot/$path")) {
2009                                 my $pr = {
2010                                         path => $path,
2011                                         owner => to_utf8($owner),
2012                                 };
2013                                 push @list, $pr;
2014                                 (my $forks_path = $path) =~ s/\.git$//;
2015                                 $paths{$forks_path}++;
2016                         }
2017                 }
2018                 close $fd;
2019         }
2020         return @list;
2021 }
2022
2023 our $gitweb_project_owner = undef;
2024 sub git_get_project_list_from_file {
2025
2026         return if (defined $gitweb_project_owner);
2027
2028         $gitweb_project_owner = {};
2029         # read from file (url-encoded):
2030         # 'git%2Fgit.git Linus+Torvalds'
2031         # 'libs%2Fklibc%2Fklibc.git H.+Peter+Anvin'
2032         # 'linux%2Fhotplug%2Fudev.git Greg+Kroah-Hartman'
2033         if (-f $projects_list) {
2034                 open (my $fd , $projects_list);
2035                 while (my $line = <$fd>) {
2036                         chomp $line;
2037                         my ($pr, $ow) = split ' ', $line;
2038                         $pr = unescape($pr);
2039                         $ow = unescape($ow);
2040                         $gitweb_project_owner->{$pr} = to_utf8($ow);
2041                 }
2042                 close $fd;
2043         }
2044 }
2045
2046 sub git_get_project_owner {
2047         my $project = shift;
2048         my $owner;
2049
2050         return undef unless $project;
2051         $git_dir = "$projectroot/$project";
2052
2053         if (!defined $gitweb_project_owner) {
2054                 git_get_project_list_from_file();
2055         }
2056
2057         if (exists $gitweb_project_owner->{$project}) {
2058                 $owner = $gitweb_project_owner->{$project};
2059         }
2060         if (!defined $owner){
2061                 $owner = git_get_project_config('owner');
2062         }
2063         if (!defined $owner) {
2064                 $owner = get_file_owner("$git_dir");
2065         }
2066
2067         return $owner;
2068 }
2069
2070 sub git_get_last_activity {
2071         my ($path) = @_;
2072         my $fd;
2073
2074         $git_dir = "$projectroot/$path";
2075         open($fd, "-|", git_cmd(), 'for-each-ref',
2076              '--format=%(committer)',
2077              '--sort=-committerdate',
2078              '--count=1',
2079              'refs/heads') or return;
2080         my $most_recent = <$fd>;
2081         close $fd or return;
2082         if (defined $most_recent &&
2083             $most_recent =~ / (\d+) [-+][01]\d\d\d$/) {
2084                 my $timestamp = $1;
2085                 my $age = time - $timestamp;
2086                 return ($age, age_string($age));
2087         }
2088         return (undef, undef);
2089 }
2090
2091 sub git_get_references {
2092         my $type = shift || "";
2093         my %refs;
2094         # 5dc01c595e6c6ec9ccda4f6f69c131c0dd945f8c refs/tags/v2.6.11
2095         # c39ae07f393806ccf406ef966e9a15afc43cc36a refs/tags/v2.6.11^{}
2096         open my $fd, "-|", git_cmd(), "show-ref", "--dereference",
2097                 ($type ? ("--", "refs/$type") : ()) # use -- <pattern> if $type
2098                 or return;
2099
2100         while (my $line = <$fd>) {
2101                 chomp $line;
2102                 if ($line =~ m!^([0-9a-fA-F]{40})\srefs/($type.*)$!) {
2103                         if (defined $refs{$1}) {
2104                                 push @{$refs{$1}}, $2;
2105                         } else {
2106                                 $refs{$1} = [ $2 ];
2107                         }
2108                 }
2109         }
2110         close $fd or return;
2111         return \%refs;
2112 }
2113
2114 sub git_get_rev_name_tags {
2115         my $hash = shift || return undef;
2116
2117         open my $fd, "-|", git_cmd(), "name-rev", "--tags", $hash
2118                 or return;
2119         my $name_rev = <$fd>;
2120         close $fd;
2121
2122         if ($name_rev =~ m|^$hash tags/(.*)$|) {
2123                 return $1;
2124         } else {
2125                 # catches also '$hash undefined' output
2126                 return undef;
2127         }
2128 }
2129
2130 ## ----------------------------------------------------------------------
2131 ## parse to hash functions
2132
2133 sub parse_date {
2134         my $epoch = shift;
2135         my $tz = shift || "-0000";
2136
2137         my %date;
2138         my @months = ("Jan", "Feb", "Mar", "Apr", "May", "Jun", "Jul", "Aug", "Sep", "Oct", "Nov", "Dec");
2139         my @days = ("Sun", "Mon", "Tue", "Wed", "Thu", "Fri", "Sat");
2140         my ($sec, $min, $hour, $mday, $mon, $year, $wday, $yday) = gmtime($epoch);
2141         $date{'hour'} = $hour;
2142         $date{'minute'} = $min;
2143         $date{'mday'} = $mday;
2144         $date{'day'} = $days[$wday];
2145         $date{'month'} = $months[$mon];
2146         $date{'rfc2822'}   = sprintf "%s, %d %s %4d %02d:%02d:%02d +0000",
2147                              $days[$wday], $mday, $months[$mon], 1900+$year, $hour ,$min, $sec;
2148         $date{'mday-time'} = sprintf "%d %s %02d:%02d",
2149                              $mday, $months[$mon], $hour ,$min;
2150         $date{'iso-8601'}  = sprintf "%04d-%02d-%02dT%02d:%02d:%02dZ",
2151                              1900+$year, 1+$mon, $mday, $hour ,$min, $sec;
2152
2153         $tz =~ m/^([+\-][0-9][0-9])([0-9][0-9])$/;
2154         my $local = $epoch + ((int $1 + ($2/60)) * 3600);
2155         ($sec, $min, $hour, $mday, $mon, $year, $wday, $yday) = gmtime($local);
2156         $date{'hour_local'} = $hour;
2157         $date{'minute_local'} = $min;
2158         $date{'tz_local'} = $tz;
2159         $date{'iso-tz'} = sprintf("%04d-%02d-%02d %02d:%02d:%02d %s",
2160                                   1900+$year, $mon+1, $mday,
2161                                   $hour, $min, $sec, $tz);
2162         return %date;
2163 }
2164
2165 sub parse_tag {
2166         my $tag_id = shift;
2167         my %tag;
2168         my @comment;
2169
2170         open my $fd, "-|", git_cmd(), "cat-file", "tag", $tag_id or return;
2171         $tag{'id'} = $tag_id;
2172         while (my $line = <$fd>) {
2173                 chomp $line;
2174                 if ($line =~ m/^object ([0-9a-fA-F]{40})$/) {
2175                         $tag{'object'} = $1;
2176                 } elsif ($line =~ m/^type (.+)$/) {
2177                         $tag{'type'} = $1;
2178                 } elsif ($line =~ m/^tag (.+)$/) {
2179                         $tag{'name'} = $1;
2180                 } elsif ($line =~ m/^tagger (.*) ([0-9]+) (.*)$/) {
2181                         $tag{'author'} = $1;
2182                         $tag{'epoch'} = $2;
2183                         $tag{'tz'} = $3;
2184                 } elsif ($line =~ m/--BEGIN/) {
2185                         push @comment, $line;
2186                         last;
2187                 } elsif ($line eq "") {
2188                         last;
2189                 }
2190         }
2191         push @comment, <$fd>;
2192         $tag{'comment'} = \@comment;
2193         close $fd or return;
2194         if (!defined $tag{'name'}) {
2195                 return
2196         };
2197         return %tag
2198 }
2199
2200 sub parse_commit_text {
2201         my ($commit_text, $withparents) = @_;
2202         my @commit_lines = split '\n', $commit_text;
2203         my %co;
2204
2205         pop @commit_lines; # Remove '\0'
2206
2207         if (! @commit_lines) {
2208                 return;
2209         }
2210
2211         my $header = shift @commit_lines;
2212         if ($header !~ m/^[0-9a-fA-F]{40}/) {
2213                 return;
2214         }
2215         ($co{'id'}, my @parents) = split ' ', $header;
2216         while (my $line = shift @commit_lines) {
2217                 last if $line eq "\n";
2218                 if ($line =~ m/^tree ([0-9a-fA-F]{40})$/) {
2219                         $co{'tree'} = $1;
2220                 } elsif ((!defined $withparents) && ($line =~ m/^parent ([0-9a-fA-F]{40})$/)) {
2221                         push @parents, $1;
2222                 } elsif ($line =~ m/^author (.*) ([0-9]+) (.*)$/) {
2223                         $co{'author'} = $1;
2224                         $co{'author_epoch'} = $2;
2225                         $co{'author_tz'} = $3;
2226                         if ($co{'author'} =~ m/^([^<]+) <([^>]*)>/) {
2227                                 $co{'author_name'}  = $1;
2228                                 $co{'author_email'} = $2;
2229                         } else {
2230                                 $co{'author_name'} = $co{'author'};
2231                         }
2232                 } elsif ($line =~ m/^committer (.*) ([0-9]+) (.*)$/) {
2233                         $co{'committer'} = $1;
2234                         $co{'committer_epoch'} = $2;
2235                         $co{'committer_tz'} = $3;
2236                         $co{'committer_name'} = $co{'committer'};
2237                         if ($co{'committer'} =~ m/^([^<]+) <([^>]*)>/) {
2238                                 $co{'committer_name'}  = $1;
2239                                 $co{'committer_email'} = $2;
2240                         } else {
2241                                 $co{'committer_name'} = $co{'committer'};
2242                         }
2243                 }
2244         }
2245         if (!defined $co{'tree'}) {
2246                 return;
2247         };
2248         $co{'parents'} = \@parents;
2249         $co{'parent'} = $parents[0];
2250
2251         foreach my $title (@commit_lines) {
2252                 $title =~ s/^    //;
2253                 if ($title ne "") {
2254                         $co{'title'} = chop_str($title, 80, 5);
2255                         # remove leading stuff of merges to make the interesting part visible
2256                         if (length($title) > 50) {
2257                                 $title =~ s/^Automatic //;
2258                                 $title =~ s/^merge (of|with) /Merge ... /i;
2259                                 if (length($title) > 50) {
2260                                         $title =~ s/(http|rsync):\/\///;
2261                                 }
2262                                 if (length($title) > 50) {
2263                                         $title =~ s/(master|www|rsync)\.//;
2264                                 }
2265                                 if (length($title) > 50) {
2266                                         $title =~ s/kernel.org:?//;
2267                                 }
2268                                 if (length($title) > 50) {
2269                                         $title =~ s/\/pub\/scm//;
2270                                 }
2271                         }
2272                         $co{'title_short'} = chop_str($title, 50, 5);
2273                         last;
2274                 }
2275         }
2276         if (! defined $co{'title'} || $co{'title'} eq "") {
2277                 $co{'title'} = $co{'title_short'} = '(no commit message)';
2278         }
2279         # remove added spaces
2280         foreach my $line (@commit_lines) {
2281                 $line =~ s/^    //;
2282         }
2283         $co{'comment'} = \@commit_lines;
2284
2285         my $age = time - $co{'committer_epoch'};
2286         $co{'age'} = $age;
2287         $co{'age_string'} = age_string($age);
2288         my ($sec, $min, $hour, $mday, $mon, $year, $wday, $yday) = gmtime($co{'committer_epoch'});
2289         if ($age > 60*60*24*7*2) {
2290                 $co{'age_string_date'} = sprintf "%4i-%02u-%02i", 1900 + $year, $mon+1, $mday;
2291                 $co{'age_string_age'} = $co{'age_string'};
2292         } else {
2293                 $co{'age_string_date'} = $co{'age_string'};
2294                 $co{'age_string_age'} = sprintf "%4i-%02u-%02i", 1900 + $year, $mon+1, $mday;
2295         }
2296         return %co;
2297 }
2298
2299 sub parse_commit {
2300         my ($commit_id) = @_;
2301         my %co;
2302
2303         local $/ = "\0";
2304
2305         open my $fd, "-|", git_cmd(), "rev-list",
2306                 "--parents",
2307                 "--header",
2308                 "--max-count=1",
2309                 $commit_id,
2310                 "--",
2311                 or die_error(500, "Open git-rev-list failed");
2312         %co = parse_commit_text(<$fd>, 1);
2313         close $fd;
2314
2315         return %co;
2316 }
2317
2318 sub parse_commits {
2319         my ($commit_id, $maxcount, $skip, $filename, @args) = @_;
2320         my @cos;
2321
2322         $maxcount ||= 1;
2323         $skip ||= 0;
2324
2325         local $/ = "\0";
2326
2327         open my $fd, "-|", git_cmd(), "rev-list",
2328                 "--header",
2329                 @args,
2330                 ("--max-count=" . $maxcount),
2331                 ("--skip=" . $skip),
2332                 @extra_options,
2333                 $commit_id,
2334                 "--",
2335                 ($filename ? ($filename) : ())
2336                 or die_error(500, "Open git-rev-list failed");
2337         while (my $line = <$fd>) {
2338                 my %co = parse_commit_text($line);
2339                 push @cos, \%co;
2340         }
2341         close $fd;
2342
2343         return wantarray ? @cos : \@cos;
2344 }
2345
2346 # parse line of git-diff-tree "raw" output
2347 sub parse_difftree_raw_line {
2348         my $line = shift;
2349         my %res;
2350
2351         # ':100644 100644 03b218260e99b78c6df0ed378e59ed9205ccc96d 3b93d5e7cc7f7dd4ebed13a5cc1a4ad976fc94d8 M   ls-files.c'
2352         # ':100644 100644 7f9281985086971d3877aca27704f2aaf9c448ce bc190ebc71bbd923f2b728e505408f5e54bd073a M   rev-tree.c'
2353         if ($line =~ m/^:([0-7]{6}) ([0-7]{6}) ([0-9a-fA-F]{40}) ([0-9a-fA-F]{40}) (.)([0-9]{0,3})\t(.*)$/) {
2354                 $res{'from_mode'} = $1;
2355                 $res{'to_mode'} = $2;
2356                 $res{'from_id'} = $3;
2357                 $res{'to_id'} = $4;
2358                 $res{'status'} = $5;
2359                 $res{'similarity'} = $6;
2360                 if ($res{'status'} eq 'R' || $res{'status'} eq 'C') { # renamed or copied
2361                         ($res{'from_file'}, $res{'to_file'}) = map { unquote($_) } split("\t", $7);
2362                 } else {
2363                         $res{'from_file'} = $res{'to_file'} = $res{'file'} = unquote($7);
2364                 }
2365         }
2366         # '::100755 100755 100755 60e79ca1b01bc8b057abe17ddab484699a7f5fdb 94067cc5f73388f33722d52ae02f44692bc07490 94067cc5f73388f33722d52ae02f44692bc07490 MR git-gui/git-gui.sh'
2367         # combined diff (for merge commit)
2368         elsif ($line =~ s/^(::+)((?:[0-7]{6} )+)((?:[0-9a-fA-F]{40} )+)([a-zA-Z]+)\t(.*)$//) {
2369                 $res{'nparents'}  = length($1);
2370                 $res{'from_mode'} = [ split(' ', $2) ];
2371                 $res{'to_mode'} = pop @{$res{'from_mode'}};
2372                 $res{'from_id'} = [ split(' ', $3) ];
2373                 $res{'to_id'} = pop @{$res{'from_id'}};
2374                 $res{'status'} = [ split('', $4) ];
2375                 $res{'to_file'} = unquote($5);
2376         }
2377         # 'c512b523472485aef4fff9e57b229d9d243c967f'
2378         elsif ($line =~ m/^([0-9a-fA-F]{40})$/) {
2379                 $res{'commit'} = $1;
2380         }
2381
2382         return wantarray ? %res : \%res;
2383 }
2384
2385 # wrapper: return parsed line of git-diff-tree "raw" output
2386 # (the argument might be raw line, or parsed info)
2387 sub parsed_difftree_line {
2388         my $line_or_ref = shift;
2389
2390         if (ref($line_or_ref) eq "HASH") {
2391                 # pre-parsed (or generated by hand)
2392                 return $line_or_ref;
2393         } else {
2394                 return parse_difftree_raw_line($line_or_ref);
2395         }
2396 }
2397
2398 # parse line of git-ls-tree output
2399 sub parse_ls_tree_line ($;%) {
2400         my $line = shift;
2401         my %opts = @_;
2402         my %res;
2403
2404         #'100644 blob 0fa3f3a66fb6a137f6ec2c19351ed4d807070ffa  panic.c'
2405         $line =~ m/^([0-9]+) (.+) ([0-9a-fA-F]{40})\t(.+)$/s;
2406
2407         $res{'mode'} = $1;
2408         $res{'type'} = $2;
2409         $res{'hash'} = $3;
2410         if ($opts{'-z'}) {
2411                 $res{'name'} = $4;
2412         } else {
2413                 $res{'name'} = unquote($4);
2414         }
2415
2416         return wantarray ? %res : \%res;
2417 }
2418
2419 # generates _two_ hashes, references to which are passed as 2 and 3 argument
2420 sub parse_from_to_diffinfo {
2421         my ($diffinfo, $from, $to, @parents) = @_;
2422
2423         if ($diffinfo->{'nparents'}) {
2424                 # combined diff
2425                 $from->{'file'} = [];
2426                 $from->{'href'} = [];
2427                 fill_from_file_info($diffinfo, @parents)
2428                         unless exists $diffinfo->{'from_file'};
2429                 for (my $i = 0; $i < $diffinfo->{'nparents'}; $i++) {
2430                         $from->{'file'}[$i] =
2431                                 defined $diffinfo->{'from_file'}[$i] ?
2432                                         $diffinfo->{'from_file'}[$i] :
2433                                         $diffinfo->{'to_file'};
2434                         if ($diffinfo->{'status'}[$i] ne "A") { # not new (added) file
2435                                 $from->{'href'}[$i] = href(action=>"blob",
2436                                                            hash_base=>$parents[$i],
2437                                                            hash=>$diffinfo->{'from_id'}[$i],
2438                                                            file_name=>$from->{'file'}[$i]);
2439                         } else {
2440                                 $from->{'href'}[$i] = undef;
2441                         }
2442                 }
2443         } else {
2444                 # ordinary (not combined) diff
2445                 $from->{'file'} = $diffinfo->{'from_file'};
2446                 if ($diffinfo->{'status'} ne "A") { # not new (added) file
2447                         $from->{'href'} = href(action=>"blob", hash_base=>$hash_parent,
2448                                                hash=>$diffinfo->{'from_id'},
2449                                                file_name=>$from->{'file'});
2450                 } else {
2451                         delete $from->{'href'};
2452                 }
2453         }
2454
2455         $to->{'file'} = $diffinfo->{'to_file'};
2456         if (!is_deleted($diffinfo)) { # file exists in result
2457                 $to->{'href'} = href(action=>"blob", hash_base=>$hash,
2458                                      hash=>$diffinfo->{'to_id'},
2459                                      file_name=>$to->{'file'});
2460         } else {
2461                 delete $to->{'href'};
2462         }
2463 }
2464
2465 ## ......................................................................
2466 ## parse to array of hashes functions
2467
2468 sub git_get_heads_list {
2469         my $limit = shift;
2470         my @headslist;
2471
2472         open my $fd, '-|', git_cmd(), 'for-each-ref',
2473                 ($limit ? '--count='.($limit+1) : ()), '--sort=-committerdate',
2474                 '--format=%(objectname) %(refname) %(subject)%00%(committer)',
2475                 'refs/heads'
2476                 or return;
2477         while (my $line = <$fd>) {
2478                 my %ref_item;
2479
2480                 chomp $line;
2481                 my ($refinfo, $committerinfo) = split(/\0/, $line);
2482                 my ($hash, $name, $title) = split(' ', $refinfo, 3);
2483                 my ($committer, $epoch, $tz) =
2484                         ($committerinfo =~ /^(.*) ([0-9]+) (.*)$/);
2485                 $ref_item{'fullname'}  = $name;
2486                 $name =~ s!^refs/heads/!!;
2487
2488                 $ref_item{'name'}  = $name;
2489                 $ref_item{'id'}    = $hash;
2490                 $ref_item{'title'} = $title || '(no commit message)';
2491                 $ref_item{'epoch'} = $epoch;
2492                 if ($epoch) {
2493                         $ref_item{'age'} = age_string(time - $ref_item{'epoch'});
2494                 } else {
2495                         $ref_item{'age'} = "unknown";
2496                 }
2497
2498                 push @headslist, \%ref_item;
2499         }
2500         close $fd;
2501
2502         return wantarray ? @headslist : \@headslist;
2503 }
2504
2505 sub git_get_tags_list {
2506         my $limit = shift;
2507         my @tagslist;
2508
2509         open my $fd, '-|', git_cmd(), 'for-each-ref',
2510                 ($limit ? '--count='.($limit+1) : ()), '--sort=-creatordate',
2511                 '--format=%(objectname) %(objecttype) %(refname) '.
2512                 '%(*objectname) %(*objecttype) %(subject)%00%(creator)',
2513                 'refs/tags'
2514                 or return;
2515         while (my $line = <$fd>) {
2516                 my %ref_item;
2517
2518                 chomp $line;
2519                 my ($refinfo, $creatorinfo) = split(/\0/, $line);
2520                 my ($id, $type, $name, $refid, $reftype, $title) = split(' ', $refinfo, 6);
2521                 my ($creator, $epoch, $tz) =
2522                         ($creatorinfo =~ /^(.*) ([0-9]+) (.*)$/);
2523                 $ref_item{'fullname'} = $name;
2524                 $name =~ s!^refs/tags/!!;
2525
2526                 $ref_item{'type'} = $type;
2527                 $ref_item{'id'} = $id;
2528                 $ref_item{'name'} = $name;
2529                 if ($type eq "tag") {
2530                         $ref_item{'subject'} = $title;
2531                         $ref_item{'reftype'} = $reftype;
2532                         $ref_item{'refid'}   = $refid;
2533                 } else {
2534                         $ref_item{'reftype'} = $type;
2535                         $ref_item{'refid'}   = $id;
2536                 }
2537
2538                 if ($type eq "tag" || $type eq "commit") {
2539                         $ref_item{'epoch'} = $epoch;
2540                         if ($epoch) {
2541                                 $ref_item{'age'} = age_string(time - $ref_item{'epoch'});
2542                         } else {
2543                                 $ref_item{'age'} = "unknown";
2544                         }
2545                 }
2546
2547                 push @tagslist, \%ref_item;
2548         }
2549         close $fd;
2550
2551         return wantarray ? @tagslist : \@tagslist;
2552 }
2553
2554 ## ----------------------------------------------------------------------
2555 ## filesystem-related functions
2556
2557 sub get_file_owner {
2558         my $path = shift;
2559
2560         my ($dev, $ino, $mode, $nlink, $st_uid, $st_gid, $rdev, $size) = stat($path);
2561         my ($name, $passwd, $uid, $gid, $quota, $comment, $gcos, $dir, $shell) = getpwuid($st_uid);
2562         if (!defined $gcos) {
2563                 return undef;
2564         }
2565         my $owner = $gcos;
2566         $owner =~ s/[,;].*$//;
2567         return to_utf8($owner);
2568 }
2569
2570 ## ......................................................................
2571 ## mimetype related functions
2572
2573 sub mimetype_guess_file {
2574         my $filename = shift;
2575         my $mimemap = shift;
2576         -r $mimemap or return undef;
2577
2578         my %mimemap;
2579         open(MIME, $mimemap) or return undef;
2580         while (<MIME>) {
2581                 next if m/^#/; # skip comments
2582                 my ($mime, $exts) = split(/\t+/);
2583                 if (defined $exts) {
2584                         my @exts = split(/\s+/, $exts);
2585                         foreach my $ext (@exts) {
2586                                 $mimemap{$ext} = $mime;
2587                         }
2588                 }
2589         }
2590         close(MIME);
2591
2592         $filename =~ /\.([^.]*)$/;
2593         return $mimemap{$1};
2594 }
2595
2596 sub mimetype_guess {
2597         my $filename = shift;
2598         my $mime;
2599         $filename =~ /\./ or return undef;
2600
2601         if ($mimetypes_file) {
2602                 my $file = $mimetypes_file;
2603                 if ($file !~ m!^/!) { # if it is relative path
2604                         # it is relative to project
2605                         $file = "$projectroot/$project/$file";
2606                 }
2607                 $mime = mimetype_guess_file($filename, $file);
2608         }
2609         $mime ||= mimetype_guess_file($filename, '/etc/mime.types');
2610         return $mime;
2611 }
2612
2613 sub blob_mimetype {
2614         my $fd = shift;
2615         my $filename = shift;
2616
2617         if ($filename) {
2618                 my $mime = mimetype_guess($filename);
2619                 $mime and return $mime;
2620         }
2621
2622         # just in case
2623         return $default_blob_plain_mimetype unless $fd;
2624
2625         if (-T $fd) {
2626                 return 'text/plain';
2627         } elsif (! $filename) {
2628                 return 'application/octet-stream';
2629         } elsif ($filename =~ m/\.png$/i) {
2630                 return 'image/png';
2631         } elsif ($filename =~ m/\.gif$/i) {
2632                 return 'image/gif';
2633         } elsif ($filename =~ m/\.jpe?g$/i) {
2634                 return 'image/jpeg';
2635         } else {
2636                 return 'application/octet-stream';
2637         }
2638 }
2639
2640 sub blob_contenttype {
2641         my ($fd, $file_name, $type) = @_;
2642
2643         $type ||= blob_mimetype($fd, $file_name);
2644         if ($type eq 'text/plain' && defined $default_text_plain_charset) {
2645                 $type .= "; charset=$default_text_plain_charset";
2646         }
2647
2648         return $type;
2649 }
2650
2651 ## ======================================================================
2652 ## functions printing HTML: header, footer, error page
2653
2654 sub git_header_html {
2655         my $status = shift || "200 OK";
2656         my $expires = shift;
2657
2658         my $title = "$site_name";
2659         if (defined $project) {
2660                 $title .= " - " . to_utf8($project);
2661                 if (defined $action) {
2662                         $title .= "/$action";
2663                         if (defined $file_name) {
2664                                 $title .= " - " . esc_path($file_name);
2665                                 if ($action eq "tree" && $file_name !~ m|/$|) {
2666                                         $title .= "/";
2667                                 }
2668                         }
2669                 }
2670         }
2671         my $content_type;
2672         # require explicit support from the UA if we are to send the page as
2673         # 'application/xhtml+xml', otherwise send it as plain old 'text/html'.
2674         # we have to do this because MSIE sometimes globs '*/*', pretending to
2675         # support xhtml+xml but choking when it gets what it asked for.
2676         if (defined $cgi->http('HTTP_ACCEPT') &&
2677             $cgi->http('HTTP_ACCEPT') =~ m/(,|;|\s|^)application\/xhtml\+xml(,|;|\s|$)/ &&
2678             $cgi->Accept('application/xhtml+xml') != 0) {
2679                 $content_type = 'application/xhtml+xml';
2680         } else {
2681                 $content_type = 'text/html';
2682         }
2683         print $cgi->header(-type=>$content_type, -charset => 'utf-8',
2684                            -status=> $status, -expires => $expires);
2685         my $mod_perl_version = $ENV{'MOD_PERL'} ? " $ENV{'MOD_PERL'}" : '';
2686         print <<EOF;
2687 <?xml version="1.0" encoding="utf-8"?>
2688 <!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Strict//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-strict.dtd">
2689 <html xmlns="http://www.w3.org/1999/xhtml" xml:lang="en-US" lang="en-US">
2690 <!-- git web interface version $version, (C) 2005-2006, Kay Sievers <kay.sievers\@vrfy.org>, Christian Gierke -->
2691 <!-- git core binaries version $git_version -->
2692 <head>
2693 <meta http-equiv="content-type" content="$content_type; charset=utf-8"/>
2694 <meta name="generator" content="gitweb/$version git/$git_version$mod_perl_version"/>
2695 <meta name="robots" content="index, nofollow"/>
2696 <title>$title</title>
2697 EOF
2698 # print out each stylesheet that exist
2699         if (defined $stylesheet) {
2700 #provides backwards capability for those people who define style sheet in a config file
2701                 print '<link rel="stylesheet" type="text/css" href="'.$stylesheet.'"/>'."\n";
2702         } else {
2703                 foreach my $stylesheet (@stylesheets) {
2704                         next unless $stylesheet;
2705                         print '<link rel="stylesheet" type="text/css" href="'.$stylesheet.'"/>'."\n";
2706                 }
2707         }
2708         if (defined $project) {
2709                 my %href_params = get_feed_info();
2710                 if (!exists $href_params{'-title'}) {
2711                         $href_params{'-title'} = 'log';
2712                 }
2713
2714                 foreach my $format qw(RSS Atom) {
2715                         my $type = lc($format);
2716                         my %link_attr = (
2717                                 '-rel' => 'alternate',
2718                                 '-title' => "$project - $href_params{'-title'} - $format feed",
2719                                 '-type' => "application/$type+xml"
2720                         );
2721
2722                         $href_params{'action'} = $type;
2723                         $link_attr{'-href'} = href(%href_params);
2724                         print "<link ".
2725                               "rel=\"$link_attr{'-rel'}\" ".
2726                               "title=\"$link_attr{'-title'}\" ".
2727                               "href=\"$link_attr{'-href'}\" ".
2728                               "type=\"$link_attr{'-type'}\" ".
2729                               "/>\n";
2730
2731                         $href_params{'extra_options'} = '--no-merges';
2732                         $link_attr{'-href'} = href(%href_params);
2733                         $link_attr{'-title'} .= ' (no merges)';
2734                         print "<link ".
2735                               "rel=\"$link_attr{'-rel'}\" ".
2736                               "title=\"$link_attr{'-title'}\" ".
2737                               "href=\"$link_attr{'-href'}\" ".
2738                               "type=\"$link_attr{'-type'}\" ".
2739                               "/>\n";
2740                 }
2741
2742         } else {
2743                 printf('<link rel="alternate" title="%s projects list" '.
2744                        'href="%s" type="text/plain; charset=utf-8" />'."\n",
2745                        $site_name, href(project=>undef, action=>"project_index"));
2746                 printf('<link rel="alternate" title="%s projects feeds" '.
2747                        'href="%s" type="text/x-opml" />'."\n",
2748                        $site_name, href(project=>undef, action=>"opml"));
2749         }
2750         if (defined $favicon) {
2751                 print qq(<link rel="shortcut icon" href="$favicon" type="image/png" />\n);
2752         }
2753
2754         print "</head>\n" .
2755               "<body>\n";
2756
2757         if (-f $site_header) {
2758                 open (my $fd, $site_header);
2759                 print <$fd>;
2760                 close $fd;
2761         }
2762
2763         print "<div class=\"page_header\">\n" .
2764               $cgi->a({-href => esc_url($logo_url),
2765                        -title => $logo_label},
2766                       qq(<img src="$logo" width="72" height="27" alt="git" class="logo"/>));
2767         print $cgi->a({-href => esc_url($home_link)}, $home_link_str) . " / ";
2768         if (defined $project) {
2769                 print $cgi->a({-href => href(action=>"summary")}, esc_html($project));
2770                 if (defined $action) {
2771                         print " / $action";
2772                 }
2773                 print "\n";
2774         }
2775         print "</div>\n";
2776
2777         my ($have_search) = gitweb_check_feature('search');
2778         if (defined $project && $have_search) {
2779                 if (!defined $searchtext) {
2780                         $searchtext = "";
2781                 }
2782                 my $search_hash;
2783                 if (defined $hash_base) {
2784                         $search_hash = $hash_base;
2785                 } elsif (defined $hash) {
2786                         $search_hash = $hash;
2787                 } else {
2788                         $search_hash = "HEAD";
2789                 }
2790                 my $action = $my_uri;
2791                 my ($use_pathinfo) = gitweb_check_feature('pathinfo');
2792                 if ($use_pathinfo) {
2793                         $action .= "/".esc_url($project);
2794                 }
2795                 print $cgi->startform(-method => "get", -action => $action) .
2796                       "<div class=\"search\">\n" .
2797                       (!$use_pathinfo &&
2798                       $cgi->input({-name=>"p", -value=>$project, -type=>"hidden"}) . "\n") .
2799                       $cgi->input({-name=>"a", -value=>"search", -type=>"hidden"}) . "\n" .
2800                       $cgi->input({-name=>"h", -value=>$search_hash, -type=>"hidden"}) . "\n" .
2801                       $cgi->popup_menu(-name => 'st', -default => 'commit',
2802                                        -values => ['commit', 'grep', 'author', 'committer', 'pickaxe']) .
2803                       $cgi->sup($cgi->a({-href => href(action=>"search_help")}, "?")) .
2804                       " search:\n",
2805                       $cgi->textfield(-name => "s", -value => $searchtext) . "\n" .
2806                       "<span title=\"Extended regular expression\">" .
2807                       $cgi->checkbox(-name => 'sr', -value => 1, -label => 're',
2808                                      -checked => $search_use_regexp) .
2809                       "</span>" .
2810                       "</div>" .
2811                       $cgi->end_form() . "\n";
2812         }
2813 }
2814
2815 sub git_footer_html {
2816         my $feed_class = 'rss_logo';
2817
2818         print "<div class=\"page_footer\">\n";
2819         if (defined $project) {
2820                 my $descr = git_get_project_description($project);
2821                 if (defined $descr) {
2822                         print "<div class=\"page_footer_text\">" . esc_html($descr) . "</div>\n";
2823                 }
2824
2825                 my %href_params = get_feed_info();
2826                 if (!%href_params) {
2827                         $feed_class .= ' generic';
2828                 }
2829                 $href_params{'-title'} ||= 'log';
2830
2831                 foreach my $format qw(RSS Atom) {
2832                         $href_params{'action'} = lc($format);
2833                         print $cgi->a({-href => href(%href_params),
2834                                       -title => "$href_params{'-title'} $format feed",
2835                                       -class => $feed_class}, $format)."\n";
2836                 }
2837
2838         } else {
2839                 print $cgi->a({-href => href(project=>undef, action=>"opml"),
2840                               -class => $feed_class}, "OPML") . " ";
2841                 print $cgi->a({-href => href(project=>undef, action=>"project_index"),
2842                               -class => $feed_class}, "TXT") . "\n";
2843         }
2844         print "</div>\n"; # class="page_footer"
2845
2846         if (-f $site_footer) {
2847                 open (my $fd, $site_footer);
2848                 print <$fd>;
2849                 close $fd;
2850         }
2851
2852         print "</body>\n" .
2853               "</html>";
2854 }
2855
2856 # die_error(<http_status_code>, <error_message>)
2857 # Example: die_error(404, 'Hash not found')
2858 # By convention, use the following status codes (as defined in RFC 2616):
2859 # 400: Invalid or missing CGI parameters, or
2860 #      requested object exists but has wrong type.
2861 # 403: Requested feature (like "pickaxe" or "snapshot") not enabled on
2862 #      this server or project.
2863 # 404: Requested object/revision/project doesn't exist.
2864 # 500: The server isn't configured properly, or
2865 #      an internal error occurred (e.g. failed assertions caused by bugs), or
2866 #      an unknown error occurred (e.g. the git binary died unexpectedly).
2867 sub die_error {
2868         my $status = shift || 500;
2869         my $error = shift || "Internal server error";
2870
2871         my %http_responses = (400 => '400 Bad Request',
2872                               403 => '403 Forbidden',
2873                               404 => '404 Not Found',
2874                               500 => '500 Internal Server Error');
2875         git_header_html($http_responses{$status});
2876         print <<EOF;
2877 <div class="page_body">
2878 <br /><br />
2879 $status - $error
2880 <br />
2881 </div>
2882 EOF
2883         git_footer_html();
2884         exit;
2885 }
2886
2887 ## ----------------------------------------------------------------------
2888 ## functions printing or outputting HTML: navigation
2889
2890 sub git_print_page_nav {
2891         my ($current, $suppress, $head, $treehead, $treebase, $extra) = @_;
2892         $extra = '' if !defined $extra; # pager or formats
2893
2894         my @navs = qw(summary shortlog log commit commitdiff tree);
2895         if ($suppress) {
2896                 @navs = grep { $_ ne $suppress } @navs;
2897         }
2898
2899         my %arg = map { $_ => {action=>$_} } @navs;
2900         if (defined $head) {
2901                 for (qw(commit commitdiff)) {
2902                         $arg{$_}{'hash'} = $head;
2903                 }
2904                 if ($current =~ m/^(tree | log | shortlog | commit | commitdiff | search)$/x) {
2905                         for (qw(shortlog log)) {
2906                                 $arg{$_}{'hash'} = $head;
2907                         }
2908                 }
2909         }
2910
2911         $arg{'tree'}{'hash'} = $treehead if defined $treehead;
2912         $arg{'tree'}{'hash_base'} = $treebase if defined $treebase;
2913
2914         my @actions = gitweb_check_feature('actions');
2915         my %repl = (
2916                 '%' => '%',
2917                 'n' => $project,         # project name
2918                 'f' => $git_dir,         # project path within filesystem
2919                 'h' => $treehead || '',  # current hash ('h' parameter)
2920                 'b' => $treebase || '',  # hash base ('hb' parameter)
2921         );
2922         while (@actions) {
2923                 my ($label, $link, $pos) = splice(@actions,0,3);
2924                 # insert
2925                 @navs = map { $_ eq $pos ? ($_, $label) : $_ } @navs;
2926                 # munch munch
2927                 $link =~ s/%([%nfhb])/$repl{$1}/g;
2928                 $arg{$label}{'_href'} = $link;
2929         }
2930
2931         print "<div class=\"page_nav\">\n" .
2932                 (join " | ",
2933                  map { $_ eq $current ?
2934                        $_ : $cgi->a({-href => ($arg{$_}{_href} ? $arg{$_}{_href} : href(%{$arg{$_}}))}, "$_")
2935                  } @navs);
2936         print "<br/>\n$extra<br/>\n" .
2937               "</div>\n";
2938 }
2939
2940 sub format_paging_nav {
2941         my ($action, $hash, $head, $page, $has_next_link) = @_;
2942         my $paging_nav;
2943
2944
2945         if ($hash ne $head || $page) {
2946                 $paging_nav .= $cgi->a({-href => href(action=>$action)}, "HEAD");
2947         } else {
2948                 $paging_nav .= "HEAD";
2949         }
2950
2951         if ($page > 0) {
2952                 $paging_nav .= " &sdot; " .
2953                         $cgi->a({-href => href(-replay=>1, page=>$page-1),
2954                                  -accesskey => "p", -title => "Alt-p"}, "prev");
2955         } else {
2956                 $paging_nav .= " &sdot; prev";
2957         }
2958
2959         if ($has_next_link) {
2960                 $paging_nav .= " &sdot; " .
2961                         $cgi->a({-href => href(-replay=>1, page=>$page+1),
2962                                  -accesskey => "n", -title => "Alt-n"}, "next");
2963         } else {
2964                 $paging_nav .= " &sdot; next";
2965         }
2966
2967         return $paging_nav;
2968 }
2969
2970 ## ......................................................................
2971 ## functions printing or outputting HTML: div
2972
2973 sub git_print_header_div {
2974         my ($action, $title, $hash, $hash_base) = @_;
2975         my %args = ();
2976
2977         $args{'action'} = $action;
2978         $args{'hash'} = $hash if $hash;
2979         $args{'hash_base'} = $hash_base if $hash_base;
2980
2981         print "<div class=\"header\">\n" .
2982               $cgi->a({-href => href(%args), -class => "title"},
2983               $title ? $title : $action) .
2984               "\n</div>\n";
2985 }
2986
2987 #sub git_print_authorship (\%) {
2988 sub git_print_authorship {
2989         my $co = shift;
2990
2991         my %ad = parse_date($co->{'author_epoch'}, $co->{'author_tz'});
2992         print "<div class=\"author_date\">" .
2993               esc_html($co->{'author_name'}) .
2994               " [$ad{'rfc2822'}";
2995         if ($ad{'hour_local'} < 6) {
2996                 printf(" (<span class=\"atnight\">%02d:%02d</span> %s)",
2997                        $ad{'hour_local'}, $ad{'minute_local'}, $ad{'tz_local'});
2998         } else {
2999                 printf(" (%02d:%02d %s)",
3000                        $ad{'hour_local'}, $ad{'minute_local'}, $ad{'tz_local'});
3001         }
3002         print "]</div>\n";
3003 }
3004
3005 sub git_print_page_path {
3006         my $name = shift;
3007         my $type = shift;
3008         my $hb = shift;
3009
3010
3011         print "<div class=\"page_path\">";
3012         print $cgi->a({-href => href(action=>"tree", hash_base=>$hb),
3013                       -title => 'tree root'}, to_utf8("[$project]"));
3014         print " / ";
3015         if (defined $name) {
3016                 my @dirname = split '/', $name;
3017                 my $basename = pop @dirname;
3018                 my $fullname = '';
3019
3020                 foreach my $dir (@dirname) {
3021                         $fullname .= ($fullname ? '/' : '') . $dir;
3022                         print $cgi->a({-href => href(action=>"tree", file_name=>$fullname,
3023                                                      hash_base=>$hb),
3024                                       -title => $fullname}, esc_path($dir));
3025                         print " / ";
3026                 }
3027                 if (defined $type && $type eq 'blob') {
3028                         print $cgi->a({-href => href(action=>"blob_plain", file_name=>$file_name,
3029                                                      hash_base=>$hb),
3030                                       -title => $name}, esc_path($basename));
3031                 } elsif (defined $type && $type eq 'tree') {
3032                         print $cgi->a({-href => href(action=>"tree", file_name=>$file_name,
3033                                                      hash_base=>$hb),
3034                                       -title => $name}, esc_path($basename));
3035                         print " / ";
3036                 } else {
3037                         print esc_path($basename);
3038                 }
3039         }
3040         print "<br/></div>\n";
3041 }
3042
3043 # sub git_print_log (\@;%) {
3044 sub git_print_log ($;%) {
3045         my $log = shift;
3046         my %opts = @_;
3047
3048         if ($opts{'-remove_title'}) {
3049                 # remove title, i.e. first line of log
3050                 shift @$log;
3051         }
3052         # remove leading empty lines
3053         while (defined $log->[0] && $log->[0] eq "") {
3054                 shift @$log;
3055         }
3056
3057         # print log
3058         my $signoff = 0;
3059         my $empty = 0;
3060         foreach my $line (@$log) {
3061                 if ($line =~ m/^ *(signed[ \-]off[ \-]by[ :]|acked[ \-]by[ :]|cc[ :])/i) {
3062                         $signoff = 1;
3063                         $empty = 0;
3064                         if (! $opts{'-remove_signoff'}) {
3065                                 print "<span class=\"signoff\">" . esc_html($line) . "</span><br/>\n";
3066                                 next;
3067                         } else {
3068                                 # remove signoff lines
3069                                 next;
3070                         }
3071                 } else {
3072                         $signoff = 0;
3073                 }
3074
3075                 # print only one empty line
3076                 # do not print empty line after signoff
3077                 if ($line eq "") {
3078                         next if ($empty || $signoff);
3079                         $empty = 1;
3080                 } else {
3081                         $empty = 0;
3082                 }
3083
3084                 print format_log_line_html($line) . "<br/>\n";
3085         }
3086
3087         if ($opts{'-final_empty_line'}) {
3088                 # end with single empty line
3089                 print "<br/>\n" unless $empty;
3090         }
3091 }
3092
3093 # return link target (what link points to)
3094 sub git_get_link_target {
3095         my $hash = shift;
3096         my $link_target;
3097
3098         # read link
3099         open my $fd, "-|", git_cmd(), "cat-file", "blob", $hash
3100                 or return;
3101         {
3102                 local $/;
3103                 $link_target = <$fd>;
3104         }
3105         close $fd
3106                 or return;
3107
3108         return $link_target;
3109 }
3110
3111 # given link target, and the directory (basedir) the link is in,
3112 # return target of link relative to top directory (top tree);
3113 # return undef if it is not possible (including absolute links).
3114 sub normalize_link_target {
3115         my ($link_target, $basedir, $hash_base) = @_;
3116
3117         # we can normalize symlink target only if $hash_base is provided
3118         return unless $hash_base;
3119
3120         # absolute symlinks (beginning with '/') cannot be normalized
3121         return if (substr($link_target, 0, 1) eq '/');
3122
3123         # normalize link target to path from top (root) tree (dir)
3124         my $path;
3125         if ($basedir) {
3126                 $path = $basedir . '/' . $link_target;
3127         } else {
3128                 # we are in top (root) tree (dir)
3129                 $path = $link_target;
3130         }
3131
3132         # remove //, /./, and /../
3133         my @path_parts;
3134         foreach my $part (split('/', $path)) {
3135                 # discard '.' and ''
3136                 next if (!$part || $part eq '.');
3137                 # handle '..'
3138                 if ($part eq '..') {
3139                         if (@path_parts) {
3140                                 pop @path_parts;
3141                         } else {
3142                                 # link leads outside repository (outside top dir)
3143                                 return;
3144                         }
3145                 } else {
3146                         push @path_parts, $part;
3147                 }
3148         }
3149         $path = join('/', @path_parts);
3150
3151         return $path;
3152 }
3153
3154 # print tree entry (row of git_tree), but without encompassing <tr> element
3155 sub git_print_tree_entry {
3156         my ($t, $basedir, $hash_base, $have_blame) = @_;
3157
3158         my %base_key = ();
3159         $base_key{'hash_base'} = $hash_base if defined $hash_base;
3160
3161         # The format of a table row is: mode list link.  Where mode is
3162         # the mode of the entry, list is the name of the entry, an href,
3163         # and link is the action links of the entry.
3164
3165         print "<td class=\"mode\">" . mode_str($t->{'mode'}) . "</td>\n";
3166         if ($t->{'type'} eq "blob") {
3167                 print "<td class=\"list\">" .
3168                         $cgi->a({-href => href(action=>"blob", hash=>$t->{'hash'},
3169                                                file_name=>"$basedir$t->{'name'}", %base_key),
3170                                 -class => "list"}, esc_path($t->{'name'}));
3171                 if (S_ISLNK(oct $t->{'mode'})) {
3172                         my $link_target = git_get_link_target($t->{'hash'});
3173                         if ($link_target) {
3174                                 my $norm_target = normalize_link_target($link_target, $basedir, $hash_base);
3175                                 if (defined $norm_target) {
3176                                         print " -> " .
3177                                               $cgi->a({-href => href(action=>"object", hash_base=>$hash_base,
3178                                                                      file_name=>$norm_target),
3179                                                        -title => $norm_target}, esc_path($link_target));
3180                                 } else {
3181                                         print " -> " . esc_path($link_target);
3182                                 }
3183                         }
3184                 }
3185                 print "</td>\n";
3186                 print "<td class=\"link\">";
3187                 print $cgi->a({-href => href(action=>"blob", hash=>$t->{'hash'},
3188                                              file_name=>"$basedir$t->{'name'}", %base_key)},
3189                               "blob");
3190                 if ($have_blame) {
3191                         print " | " .
3192                               $cgi->a({-href => href(action=>"blame", hash=>$t->{'hash'},
3193                                                      file_name=>"$basedir$t->{'name'}", %base_key)},
3194                                       "blame");
3195                 }
3196                 if (defined $hash_base) {
3197                         print " | " .
3198                               $cgi->a({-href => href(action=>"history", hash_base=>$hash_base,
3199                                                      hash=>$t->{'hash'}, file_name=>"$basedir$t->{'name'}")},
3200                                       "history");
3201                 }
3202                 print " | " .
3203                         $cgi->a({-href => href(action=>"blob_plain", hash_base=>$hash_base,
3204                                                file_name=>"$basedir$t->{'name'}")},
3205                                 "raw");
3206                 print "</td>\n";
3207
3208         } elsif ($t->{'type'} eq "tree") {
3209                 print "<td class=\"list\">";
3210                 print $cgi->a({-href => href(action=>"tree", hash=>$t->{'hash'},
3211                                              file_name=>"$basedir$t->{'name'}", %base_key)},
3212                               esc_path($t->{'name'}));
3213                 print "</td>\n";
3214                 print "<td class=\"link\">";
3215                 print $cgi->a({-href => href(action=>"tree", hash=>$t->{'hash'},
3216                                              file_name=>"$basedir$t->{'name'}", %base_key)},
3217                               "tree");
3218                 if (defined $hash_base) {
3219                         print " | " .
3220                               $cgi->a({-href => href(action=>"history", hash_base=>$hash_base,
3221                                                      file_name=>"$basedir$t->{'name'}")},
3222                                       "history");
3223                 }
3224                 print "</td>\n";
3225         } else {
3226                 # unknown object: we can only present history for it
3227                 # (this includes 'commit' object, i.e. submodule support)
3228                 print "<td class=\"list\">" .
3229                       esc_path($t->{'name'}) .
3230                       "</td>\n";
3231                 print "<td class=\"link\">";
3232                 if (defined $hash_base) {
3233                         print $cgi->a({-href => href(action=>"history",
3234                                                      hash_base=>$hash_base,
3235                                                      file_name=>"$basedir$t->{'name'}")},
3236                                       "history");
3237                 }
3238                 print "</td>\n";
3239         }
3240 }
3241
3242 ## ......................................................................
3243 ## functions printing large fragments of HTML
3244
3245 # get pre-image filenames for merge (combined) diff
3246 sub fill_from_file_info {
3247         my ($diff, @parents) = @_;
3248
3249         $diff->{'from_file'} = [ ];
3250         $diff->{'from_file'}[$diff->{'nparents'} - 1] = undef;
3251         for (my $i = 0; $i < $diff->{'nparents'}; $i++) {
3252                 if ($diff->{'status'}[$i] eq 'R' ||
3253                     $diff->{'status'}[$i] eq 'C') {
3254                         $diff->{'from_file'}[$i] =
3255                                 git_get_path_by_hash($parents[$i], $diff->{'from_id'}[$i]);
3256                 }
3257         }
3258
3259         return $diff;
3260 }
3261
3262 # is current raw difftree line of file deletion
3263 sub is_deleted {
3264         my $diffinfo = shift;
3265
3266         return $diffinfo->{'to_id'} eq ('0' x 40);
3267 }
3268
3269 # does patch correspond to [previous] difftree raw line
3270 # $diffinfo  - hashref of parsed raw diff format
3271 # $patchinfo - hashref of parsed patch diff format
3272 #              (the same keys as in $diffinfo)
3273 sub is_patch_split {
3274         my ($diffinfo, $patchinfo) = @_;
3275
3276         return defined $diffinfo && defined $patchinfo
3277                 && $diffinfo->{'to_file'} eq $patchinfo->{'to_file'};
3278 }
3279
3280
3281 sub git_difftree_body {
3282         my ($difftree, $hash, @parents) = @_;
3283         my ($parent) = $parents[0];
3284         my ($have_blame) = gitweb_check_feature('blame');
3285         print "<div class=\"list_head\">\n";
3286         if ($#{$difftree} > 10) {
3287                 print(($#{$difftree} + 1) . " files changed:\n");
3288         }
3289         print "</div>\n";
3290
3291         print "<table class=\"" .
3292               (@parents > 1 ? "combined " : "") .
3293               "diff_tree\">\n";
3294
3295         # header only for combined diff in 'commitdiff' view
3296         my $has_header = @$difftree && @parents > 1 && $action eq 'commitdiff';
3297         if ($has_header) {
3298                 # table header
3299                 print "<thead><tr>\n" .
3300                        "<th></th><th></th>\n"; # filename, patchN link
3301                 for (my $i = 0; $i < @parents; $i++) {
3302                         my $par = $parents[$i];
3303                         print "<th>" .
3304                               $cgi->a({-href => href(action=>"commitdiff",
3305                                                      hash=>$hash, hash_parent=>$par),
3306                                        -title => 'commitdiff to parent number ' .
3307                                                   ($i+1) . ': ' . substr($par,0,7)},
3308                                       $i+1) .
3309                               "&nbsp;</th>\n";
3310                 }
3311                 print "</tr></thead>\n<tbody>\n";
3312         }
3313
3314         my $alternate = 1;
3315         my $patchno = 0;
3316         foreach my $line (@{$difftree}) {
3317                 my $diff = parsed_difftree_line($line);
3318
3319                 if ($alternate) {
3320                         print "<tr class=\"dark\">\n";
3321                 } else {
3322                         print "<tr class=\"light\">\n";
3323                 }
3324                 $alternate ^= 1;
3325
3326                 if (exists $diff->{'nparents'}) { # combined diff
3327
3328                         fill_from_file_info($diff, @parents)
3329                                 unless exists $diff->{'from_file'};
3330
3331                         if (!is_deleted($diff)) {
3332                                 # file exists in the result (child) commit
3333                                 print "<td>" .
3334                                       $cgi->a({-href => href(action=>"blob", hash=>$diff->{'to_id'},
3335                                                              file_name=>$diff->{'to_file'},
3336                                                              hash_base=>$hash),
3337                                               -class => "list"}, esc_path($diff->{'to_file'})) .
3338                                       "</td>\n";
3339                         } else {
3340                                 print "<td>" .
3341                                       esc_path($diff->{'to_file'}) .
3342                                       "</td>\n";
3343                         }
3344
3345                         if ($action eq 'commitdiff') {
3346                                 # link to patch
3347                                 $patchno++;
3348                                 print "<td class=\"link\">" .
3349                                       $cgi->a({-href => "#patch$patchno"}, "patch") .
3350                                       " | " .
3351                                       "</td>\n";
3352                         }
3353
3354                         my $has_history = 0;
3355                         my $not_deleted = 0;
3356                         for (my $i = 0; $i < $diff->{'nparents'}; $i++) {
3357                                 my $hash_parent = $parents[$i];
3358                                 my $from_hash = $diff->{'from_id'}[$i];
3359                                 my $from_path = $diff->{'from_file'}[$i];
3360                                 my $status = $diff->{'status'}[$i];
3361
3362                                 $has_history ||= ($status ne 'A');
3363                                 $not_deleted ||= ($status ne 'D');
3364
3365                                 if ($status eq 'A') {
3366                                         print "<td  class=\"link\" align=\"right\"> | </td>\n";
3367                                 } elsif ($status eq 'D') {
3368                                         print "<td class=\"link\">" .
3369                                               $cgi->a({-href => href(action=>"blob",
3370                                                                      hash_base=>$hash,
3371                                                                      hash=>$from_hash,
3372                                                                      file_name=>$from_path)},
3373                                                       "blob" . ($i+1)) .
3374                                               " | </td>\n";
3375                                 } else {
3376                                         if ($diff->{'to_id'} eq $from_hash) {
3377                                                 print "<td class=\"link nochange\">";
3378                                         } else {
3379                                                 print "<td class=\"link\">";
3380                                         }
3381                                         print $cgi->a({-href => href(action=>"blobdiff",
3382                                                                      hash=>$diff->{'to_id'},
3383                                                                      hash_parent=>$from_hash,
3384                                                                      hash_base=>$hash,
3385                                                                      hash_parent_base=>$hash_parent,
3386                                                                      file_name=>$diff->{'to_file'},
3387                                                                      file_parent=>$from_path)},
3388                                                       "diff" . ($i+1)) .
3389                                               " | </td>\n";
3390                                 }
3391                         }
3392
3393                         print "<td class=\"link\">";
3394                         if ($not_deleted) {
3395                                 print $cgi->a({-href => href(action=>"blob",
3396                                                              hash=>$diff->{'to_id'},
3397                                                              file_name=>$diff->{'to_file'},
3398                                                              hash_base=>$hash)},
3399                                               "blob");
3400                                 print " | " if ($has_history);
3401                         }
3402                         if ($has_history) {
3403                                 print $cgi->a({-href => href(action=>"history",
3404                                                              file_name=>$diff->{'to_file'},
3405                                                              hash_base=>$hash)},
3406                                               "history");
3407                         }
3408                         print "</td>\n";
3409
3410                         print "</tr>\n";
3411                         next; # instead of 'else' clause, to avoid extra indent
3412                 }
3413                 # else ordinary diff
3414
3415                 my ($to_mode_oct, $to_mode_str, $to_file_type);
3416                 my ($from_mode_oct, $from_mode_str, $from_file_type);
3417                 if ($diff->{'to_mode'} ne ('0' x 6)) {
3418                         $to_mode_oct = oct $diff->{'to_mode'};
3419                         if (S_ISREG($to_mode_oct)) { # only for regular file
3420                                 $to_mode_str = sprintf("%04o", $to_mode_oct & 0777); # permission bits
3421                         }
3422                         $to_file_type = file_type($diff->{'to_mode'});
3423                 }
3424                 if ($diff->{'from_mode'} ne ('0' x 6)) {
3425                         $from_mode_oct = oct $diff->{'from_mode'};
3426                         if (S_ISREG($to_mode_oct)) { # only for regular file
3427                                 $from_mode_str = sprintf("%04o", $from_mode_oct & 0777); # permission bits
3428                         }
3429                         $from_file_type = file_type($diff->{'from_mode'});
3430                 }
3431
3432                 if ($diff->{'status'} eq "A") { # created
3433                         my $mode_chng = "<span class=\"file_status new\">[new $to_file_type";
3434                         $mode_chng   .= " with mode: $to_mode_str" if $to_mode_str;
3435                         $mode_chng   .= "]</span>";
3436                         print "<td>";
3437                         print $cgi->a({-href => href(action=>"blob", hash=>$diff->{'to_id'},
3438                                                      hash_base=>$hash, file_name=>$diff->{'file'}),
3439                                       -class => "list"}, esc_path($diff->{'file'}));
3440                         print "</td>\n";
3441                         print "<td>$mode_chng</td>\n";
3442                         print "<td class=\"link\">";
3443                         if ($action eq 'commitdiff') {
3444                                 # link to patch
3445                                 $patchno++;
3446                                 print $cgi->a({-href => "#patch$patchno"}, "patch");
3447                                 print " | ";
3448                         }
3449                         print $cgi->a({-href => href(action=>"blob", hash=>$diff->{'to_id'},
3450                                                      hash_base=>$hash, file_name=>$diff->{'file'})},
3451                                       "blob");
3452                         print "</td>\n";
3453
3454                 } elsif ($diff->{'status'} eq "D") { # deleted
3455                         my $mode_chng = "<span class=\"file_status deleted\">[deleted $from_file_type]</span>";
3456                         print "<td>";
3457                         print $cgi->a({-href => href(action=>"blob", hash=>$diff->{'from_id'},
3458                                                      hash_base=>$parent, file_name=>$diff->{'file'}),
3459                                        -class => "list"}, esc_path($diff->{'file'}));
3460                         print "</td>\n";
3461                         print "<td>$mode_chng</td>\n";
3462                         print "<td class=\"link\">";
3463                         if ($action eq 'commitdiff') {
3464                                 # link to patch
3465                                 $patchno++;
3466                                 print $cgi->a({-href => "#patch$patchno"}, "patch");
3467                                 print " | ";
3468                         }
3469                         print $cgi->a({-href => href(action=>"blob", hash=>$diff->{'from_id'},
3470                                                      hash_base=>$parent, file_name=>$diff->{'file'})},
3471                                       "blob") . " | ";
3472                         if ($have_blame) {
3473                                 print $cgi->a({-href => href(action=>"blame", hash_base=>$parent,
3474                                                              file_name=>$diff->{'file'})},
3475                                               "blame") . " | ";
3476                         }
3477                         print $cgi->a({-href => href(action=>"history", hash_base=>$parent,
3478                                                      file_name=>$diff->{'file'})},
3479                                       "history");
3480                         print "</td>\n";
3481
3482                 } elsif ($diff->{'status'} eq "M" || $diff->{'status'} eq "T") { # modified, or type changed
3483                         my $mode_chnge = "";
3484                         if ($diff->{'from_mode'} != $diff->{'to_mode'}) {
3485                                 $mode_chnge = "<span class=\"file_status mode_chnge\">[changed";
3486                                 if ($from_file_type ne $to_file_type) {
3487                                         $mode_chnge .= " from $from_file_type to $to_file_type";
3488                                 }
3489                                 if (($from_mode_oct & 0777) != ($to_mode_oct & 0777)) {
3490                                         if ($from_mode_str && $to_mode_str) {
3491                                                 $mode_chnge .= " mode: $from_mode_str->$to_mode_str";
3492                                         } elsif ($to_mode_str) {
3493                                                 $mode_chnge .= " mode: $to_mode_str";
3494                                         }
3495                                 }
3496                                 $mode_chnge .= "]</span>\n";
3497                         }
3498                         print "<td>";
3499                         print $cgi->a({-href => href(action=>"blob", hash=>$diff->{'to_id'},
3500                                                      hash_base=>$hash, file_name=>$diff->{'file'}),
3501                                       -class => "list"}, esc_path($diff->{'file'}));
3502                         print "</td>\n";
3503                         print "<td>$mode_chnge</td>\n";
3504                         print "<td class=\"link\">";
3505                         if ($action eq 'commitdiff') {
3506                                 # link to patch
3507                                 $patchno++;
3508                                 print $cgi->a({-href => "#patch$patchno"}, "patch") .
3509                                       " | ";
3510                         } elsif ($diff->{'to_id'} ne $diff->{'from_id'}) {
3511                                 # "commit" view and modified file (not onlu mode changed)
3512                                 print $cgi->a({-href => href(action=>"blobdiff",
3513                                                              hash=>$diff->{'to_id'}, hash_parent=>$diff->{'from_id'},
3514                                                              hash_base=>$hash, hash_parent_base=>$parent,
3515                                                              file_name=>$diff->{'file'})},
3516                                               "diff") .
3517                                       " | ";
3518                         }
3519                         print $cgi->a({-href => href(action=>"blob", hash=>$diff->{'to_id'},
3520                                                      hash_base=>$hash, file_name=>$diff->{'file'})},
3521                                        "blob") . " | ";
3522                         if ($have_blame) {
3523                                 print $cgi->a({-href => href(action=>"blame", hash_base=>$hash,
3524                                                              file_name=>$diff->{'file'})},
3525                                               "blame") . " | ";
3526                         }
3527                         print $cgi->a({-href => href(action=>"history", hash_base=>$hash,
3528                                                      file_name=>$diff->{'file'})},
3529                                       "history");
3530                         print "</td>\n";
3531
3532                 } elsif ($diff->{'status'} eq "R" || $diff->{'status'} eq "C") { # renamed or copied
3533                         my %status_name = ('R' => 'moved', 'C' => 'copied');
3534                         my $nstatus = $status_name{$diff->{'status'}};
3535                         my $mode_chng = "";
3536                         if ($diff->{'from_mode'} != $diff->{'to_mode'}) {
3537                                 # mode also for directories, so we cannot use $to_mode_str
3538                                 $mode_chng = sprintf(", mode: %04o", $to_mode_oct & 0777);
3539                         }
3540                         print "<td>" .
3541                               $cgi->a({-href => href(action=>"blob", hash_base=>$hash,
3542                                                      hash=>$diff->{'to_id'}, file_name=>$diff->{'to_file'}),
3543                                       -class => "list"}, esc_path($diff->{'to_file'})) . "</td>\n" .
3544                               "<td><span class=\"file_status $nstatus\">[$nstatus from " .
3545                               $cgi->a({-href => href(action=>"blob", hash_base=>$parent,
3546                                                      hash=>$diff->{'from_id'}, file_name=>$diff->{'from_file'}),
3547                                       -class => "list"}, esc_path($diff->{'from_file'})) .
3548                               " with " . (int $diff->{'similarity'}) . "% similarity$mode_chng]</span></td>\n" .
3549                               "<td class=\"link\">";
3550                         if ($action eq 'commitdiff') {
3551                                 # link to patch
3552                                 $patchno++;
3553                                 print $cgi->a({-href => "#patch$patchno"}, "patch") .
3554                                       " | ";
3555                         } elsif ($diff->{'to_id'} ne $diff->{'from_id'}) {
3556                                 # "commit" view and modified file (not only pure rename or copy)
3557                                 print $cgi->a({-href => href(action=>"blobdiff",
3558                                                              hash=>$diff->{'to_id'}, hash_parent=>$diff->{'from_id'},
3559                                                              hash_base=>$hash, hash_parent_base=>$parent,
3560                                                              file_name=>$diff->{'to_file'}, file_parent=>$diff->{'from_file'})},
3561                                               "diff") .
3562                                       " | ";
3563                         }
3564                         print $cgi->a({-href => href(action=>"blob", hash=>$diff->{'to_id'},
3565                                                      hash_base=>$parent, file_name=>$diff->{'to_file'})},
3566                                       "blob") . " | ";
3567                         if ($have_blame) {
3568                                 print $cgi->a({-href => href(action=>"blame", hash_base=>$hash,
3569                                                              file_name=>$diff->{'to_file'})},
3570                                               "blame") . " | ";
3571                         }
3572                         print $cgi->a({-href => href(action=>"history", hash_base=>$hash,
3573                                                     file_name=>$diff->{'to_file'})},
3574                                       "history");
3575                         print "</td>\n";
3576
3577                 } # we should not encounter Unmerged (U) or Unknown (X) status
3578                 print "</tr>\n";
3579         }
3580         print "</tbody>" if $has_header;
3581         print "</table>\n";
3582 }
3583
3584 sub git_patchset_body {
3585         my ($fd, $difftree, $hash, @hash_parents) = @_;
3586         my ($hash_parent) = $hash_parents[0];
3587
3588         my $is_combined = (@hash_parents > 1);
3589         my $patch_idx = 0;
3590         my $patch_number = 0;
3591         my $patch_line;
3592         my $diffinfo;
3593         my $to_name;
3594         my (%from, %to);
3595
3596         print "<div class=\"patchset\">\n";
3597
3598         # skip to first patch
3599         while ($patch_line = <$fd>) {
3600                 chomp $patch_line;
3601
3602                 last if ($patch_line =~ m/^diff /);
3603         }
3604
3605  PATCH:
3606         while ($patch_line) {
3607
3608                 # parse "git diff" header line
3609                 if ($patch_line =~ m/^diff --git (\"(?:[^\\\"]*(?:\\.[^\\\"]*)*)\"|[^ "]*) (.*)$/) {
3610                         # $1 is from_name, which we do not use
3611                         $to_name = unquote($2);
3612                         $to_name =~ s!^b/!!;
3613                 } elsif ($patch_line =~ m/^diff --(cc|combined) ("?.*"?)$/) {
3614                         # $1 is 'cc' or 'combined', which we do not use
3615                         $to_name = unquote($2);
3616                 } else {
3617                         $to_name = undef;
3618                 }
3619
3620                 # check if current patch belong to current raw line
3621                 # and parse raw git-diff line if needed
3622                 if (is_patch_split($diffinfo, { 'to_file' => $to_name })) {
3623                         # this is continuation of a split patch
3624                         print "<div class=\"patch cont\">\n";
3625                 } else {
3626                         # advance raw git-diff output if needed
3627                         $patch_idx++ if defined $diffinfo;
3628
3629                         # read and prepare patch information
3630                         $diffinfo = parsed_difftree_line($difftree->[$patch_idx]);
3631
3632                         # compact combined diff output can have some patches skipped
3633                         # find which patch (using pathname of result) we are at now;
3634                         if ($is_combined) {
3635                                 while ($to_name ne $diffinfo->{'to_file'}) {
3636                                         print "<div class=\"patch\" id=\"patch". ($patch_idx+1) ."\">\n" .
3637                                               format_diff_cc_simplified($diffinfo, @hash_parents) .
3638                                               "</div>\n";  # class="patch"
3639
3640                                         $patch_idx++;
3641                                         $patch_number++;
3642
3643                                         last if $patch_idx > $#$difftree;
3644                                         $diffinfo = parsed_difftree_line($difftree->[$patch_idx]);
3645                                 }
3646                         }
3647
3648                         # modifies %from, %to hashes
3649                         parse_from_to_diffinfo($diffinfo, \%from, \%to, @hash_parents);
3650
3651                         # this is first patch for raw difftree line with $patch_idx index
3652                         # we index @$difftree array from 0, but number patches from 1
3653                         print "<div class=\"patch\" id=\"patch". ($patch_idx+1) ."\">\n";
3654                 }
3655
3656                 # git diff header
3657                 #assert($patch_line =~ m/^diff /) if DEBUG;
3658                 #assert($patch_line !~ m!$/$!) if DEBUG; # is chomp-ed
3659                 $patch_number++;
3660                 # print "git diff" header
3661                 print format_git_diff_header_line($patch_line, $diffinfo,
3662                                                   \%from, \%to);
3663
3664                 # print extended diff header
3665                 print "<div class=\"diff extended_header\">\n";
3666         EXTENDED_HEADER:
3667                 while ($patch_line = <$fd>) {
3668                         chomp $patch_line;
3669
3670                         last EXTENDED_HEADER if ($patch_line =~ m/^--- |^diff /);
3671
3672                         print format_extended_diff_header_line($patch_line, $diffinfo,
3673                                                                \%from, \%to);
3674                 }
3675                 print "</div>\n"; # class="diff extended_header"
3676
3677                 # from-file/to-file diff header
3678                 if (! $patch_line) {
3679                         print "</div>\n"; # class="patch"
3680                         last PATCH;
3681                 }
3682                 next PATCH if ($patch_line =~ m/^diff /);
3683                 #assert($patch_line =~ m/^---/) if DEBUG;
3684
3685                 my $last_patch_line = $patch_line;
3686                 $patch_line = <$fd>;
3687                 chomp $patch_line;
3688                 #assert($patch_line =~ m/^\+\+\+/) if DEBUG;
3689
3690                 print format_diff_from_to_header($last_patch_line, $patch_line,
3691                                                  $diffinfo, \%from, \%to,
3692                                                  @hash_parents);
3693
3694                 # the patch itself
3695         LINE:
3696                 while ($patch_line = <$fd>) {
3697                         chomp $patch_line;
3698
3699                         next PATCH if ($patch_line =~ m/^diff /);
3700
3701                         print format_diff_line($patch_line, \%from, \%to);
3702                 }
3703
3704         } continue {
3705                 print "</div>\n"; # class="patch"
3706         }
3707
3708         # for compact combined (--cc) format, with chunk and patch simpliciaction
3709         # patchset might be empty, but there might be unprocessed raw lines
3710         for (++$patch_idx if $patch_number > 0;
3711              $patch_idx < @$difftree;
3712              ++$patch_idx) {
3713                 # read and prepare patch information
3714                 $diffinfo = parsed_difftree_line($difftree->[$patch_idx]);
3715
3716                 # generate anchor for "patch" links in difftree / whatchanged part
3717                 print "<div class=\"patch\" id=\"patch". ($patch_idx+1) ."\">\n" .
3718                       format_diff_cc_simplified($diffinfo, @hash_parents) .
3719                       "</div>\n";  # class="patch"
3720
3721                 $patch_number++;
3722         }
3723
3724         if ($patch_number == 0) {
3725                 if (@hash_parents > 1) {
3726                         print "<div class=\"diff nodifferences\">Trivial merge</div>\n";
3727                 } else {
3728                         print "<div class=\"diff nodifferences\">No differences found</div>\n";
3729                 }
3730         }
3731
3732         print "</div>\n"; # class="patchset"
3733 }
3734
3735 # . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
3736
3737 # fills project list info (age, description, owner, forks) for each
3738 # project in the list, removing invalid projects from returned list
3739 # NOTE: modifies $projlist, but does not remove entries from it
3740 sub fill_project_list_info {
3741         my ($projlist, $check_forks) = @_;
3742         my @projects;
3743
3744         my $show_ctags = gitweb_check_feature('ctags');
3745  PROJECT:
3746         foreach my $pr (@$projlist) {
3747                 my (@activity) = git_get_last_activity($pr->{'path'});
3748                 unless (@activity) {
3749                         next PROJECT;
3750                 }
3751                 ($pr->{'age'}, $pr->{'age_string'}) = @activity;
3752                 if (!defined $pr->{'descr'}) {
3753                         my $descr = git_get_project_description($pr->{'path'}) || "";
3754                         $descr = to_utf8($descr);
3755                         $pr->{'descr_long'} = $descr;
3756                         $pr->{'descr'} = chop_str($descr, $projects_list_description_width, 5);
3757                 }
3758                 if (!defined $pr->{'owner'}) {
3759                         $pr->{'owner'} = git_get_project_owner("$pr->{'path'}") || "";
3760                 }
3761                 if ($check_forks) {
3762                         my $pname = $pr->{'path'};
3763                         if (($pname =~ s/\.git$//) &&
3764                             ($pname !~ /\/$/) &&
3765                             (-d "$projectroot/$pname")) {
3766                                 $pr->{'forks'} = "-d $projectroot/$pname";
3767                         }       else {
3768                                 $pr->{'forks'} = 0;
3769                         }
3770                 }
3771                 $show_ctags and $pr->{'ctags'} = git_get_project_ctags($pr->{'path'});
3772                 push @projects, $pr;
3773         }
3774
3775         return @projects;
3776 }
3777
3778 # print 'sort by' <th> element, generating 'sort by $name' replay link
3779 # if that order is not selected
3780 sub print_sort_th {
3781         my ($name, $order, $header) = @_;
3782         $header ||= ucfirst($name);
3783
3784         if ($order eq $name) {
3785                 print "<th>$header</th>\n";
3786         } else {
3787                 print "<th>" .
3788                       $cgi->a({-href => href(-replay=>1, order=>$name),
3789                                -class => "header"}, $header) .
3790                       "</th>\n";
3791         }
3792 }
3793
3794 sub git_project_list_body {
3795         # actually uses global variable $project
3796         my ($projlist, $order, $from, $to, $extra, $no_header) = @_;
3797
3798         my ($check_forks) = gitweb_check_feature('forks');
3799         my @projects = fill_project_list_info($projlist, $check_forks);
3800
3801         $order ||= $default_projects_order;
3802         $from = 0 unless defined $from;
3803         $to = $#projects if (!defined $to || $#projects < $to);
3804
3805         my %order_info = (
3806                 project => { key => 'path', type => 'str' },
3807                 descr => { key => 'descr_long', type => 'str' },
3808                 owner => { key => 'owner', type => 'str' },
3809                 age => { key => 'age', type => 'num' }
3810         );
3811         my $oi = $order_info{$order};
3812         if ($oi->{'type'} eq 'str') {
3813                 @projects = sort {$a->{$oi->{'key'}} cmp $b->{$oi->{'key'}}} @projects;
3814         } else {
3815                 @projects = sort {$a->{$oi->{'key'}} <=> $b->{$oi->{'key'}}} @projects;
3816         }
3817
3818         my $show_ctags = gitweb_check_feature('ctags');
3819         if ($show_ctags) {
3820                 my %ctags;
3821                 foreach my $p (@projects) {
3822                         foreach my $ct (keys %{$p->{'ctags'}}) {
3823                                 $ctags{$ct} += $p->{'ctags'}->{$ct};
3824                         }
3825                 }
3826                 my $cloud = git_populate_project_tagcloud(\%ctags);
3827                 print git_show_project_tagcloud($cloud, 64);
3828         }
3829
3830         print "<table class=\"project_list\">\n";
3831         unless ($no_header) {
3832                 print "<tr>\n";
3833                 if ($check_forks) {
3834                         print "<th></th>\n";
3835                 }
3836                 print_sort_th('project', $order, 'Project');
3837                 print_sort_th('descr', $order, 'Description');
3838                 print_sort_th('owner', $order, 'Owner');
3839                 print_sort_th('age', $order, 'Last Change');
3840                 print "<th></th>\n" . # for links
3841                       "</tr>\n";
3842         }
3843         my $alternate = 1;
3844         my $tagfilter = $cgi->param('by_tag');
3845         for (my $i = $from; $i <= $to; $i++) {
3846                 my $pr = $projects[$i];
3847
3848                 next if $tagfilter and $show_ctags and not grep { lc $_ eq lc $tagfilter } keys %{$pr->{'ctags'}};
3849                 next if $searchtext and not $pr->{'path'} =~ /$searchtext/
3850                         and not $pr->{'descr_long'} =~ /$searchtext/;
3851                 # Weed out forks or non-matching entries of search
3852                 if ($check_forks) {
3853                         my $forkbase = $project; $forkbase ||= ''; $forkbase =~ s#\.git$#/#;
3854                         $forkbase="^$forkbase" if $forkbase;
3855                         next if not $searchtext and not $tagfilter and $show_ctags
3856                                 and $pr->{'path'} =~ m#$forkbase.*/.*#; # regexp-safe
3857                 }
3858
3859                 if ($alternate) {
3860                         print "<tr class=\"dark\">\n";
3861                 } else {
3862                         print "<tr class=\"light\">\n";
3863                 }
3864                 $alternate ^= 1;
3865                 if ($check_forks) {
3866                         print "<td>";
3867                         if ($pr->{'forks'}) {
3868                                 print "<!-- $pr->{'forks'} -->\n";
3869                                 print $cgi->a({-href => href(project=>$pr->{'path'}, action=>"forks")}, "+");
3870                         }
3871                         print "</td>\n";
3872                 }
3873                 print "<td>" . $cgi->a({-href => href(project=>$pr->{'path'}, action=>"summary"),
3874                                         -class => "list"}, esc_html($pr->{'path'})) . "</td>\n" .
3875                       "<td>" . $cgi->a({-href => href(project=>$pr->{'path'}, action=>"summary"),
3876                                         -class => "list", -title => $pr->{'descr_long'}},
3877                                         esc_html($pr->{'descr'})) . "</td>\n" .
3878                       "<td><i>" . chop_and_escape_str($pr->{'owner'}, 15) . "</i></td>\n";
3879                 print "<td class=\"". age_class($pr->{'age'}) . "\">" .
3880                       (defined $pr->{'age_string'} ? $pr->{'age_string'} : "No commits") . "</td>\n" .
3881                       "<td class=\"link\">" .
3882                       $cgi->a({-href => href(project=>$pr->{'path'}, action=>"summary")}, "summary")   . " | " .
3883                       $cgi->a({-href => href(project=>$pr->{'path'}, action=>"shortlog")}, "shortlog") . " | " .
3884                       $cgi->a({-href => href(project=>$pr->{'path'}, action=>"log")}, "log") . " | " .
3885                       $cgi->a({-href => href(project=>$pr->{'path'}, action=>"tree")}, "tree") .
3886                       ($pr->{'forks'} ? " | " . $cgi->a({-href => href(project=>$pr->{'path'}, action=>"forks")}, "forks") : '') .
3887                       "</td>\n" .
3888                       "</tr>\n";
3889         }
3890         if (defined $extra) {
3891                 print "<tr>\n";
3892                 if ($check_forks) {
3893                         print "<td></td>\n";
3894                 }
3895                 print "<td colspan=\"5\">$extra</td>\n" .
3896                       "</tr>\n";
3897         }
3898         print "</table>\n";
3899 }
3900
3901 sub git_shortlog_body {
3902         # uses global variable $project
3903         my ($commitlist, $from, $to, $refs, $extra) = @_;
3904
3905         $from = 0 unless defined $from;
3906         $to = $#{$commitlist} if (!defined $to || $#{$commitlist} < $to);
3907
3908         print "<table class=\"shortlog\">\n";
3909         my $alternate = 1;
3910         for (my $i = $from; $i <= $to; $i++) {
3911                 my %co = %{$commitlist->[$i]};
3912                 my $commit = $co{'id'};
3913                 my $ref = format_ref_marker($refs, $commit);
3914                 if ($alternate) {
3915                         print "<tr class=\"dark\">\n";
3916                 } else {
3917                         print "<tr class=\"light\">\n";
3918                 }
3919                 $alternate ^= 1;
3920                 my $author = chop_and_escape_str($co{'author_name'}, 10);
3921                 # git_summary() used print "<td><i>$co{'age_string'}</i></td>\n" .
3922                 print "<td title=\"$co{'age_string_age'}\"><i>$co{'age_string_date'}</i></td>\n" .
3923                       "<td><i>" . $author . "</i></td>\n" .
3924                       "<td>";
3925                 print format_subject_html($co{'title'}, $co{'title_short'},
3926                                           href(action=>"commit", hash=>$commit), $ref);
3927                 print "</td>\n" .
3928                       "<td class=\"link\">" .
3929                       $cgi->a({-href => href(action=>"commit", hash=>$commit)}, "commit") . " | " .
3930                       $cgi->a({-href => href(action=>"commitdiff", hash=>$commit)}, "commitdiff") . " | " .
3931                       $cgi->a({-href => href(action=>"tree", hash=>$commit, hash_base=>$commit)}, "tree");
3932                 my $snapshot_links = format_snapshot_links($commit);
3933                 if (defined $snapshot_links) {
3934                         print " | " . $snapshot_links;
3935                 }
3936                 print "</td>\n" .
3937                       "</tr>\n";
3938         }
3939         if (defined $extra) {
3940                 print "<tr>\n" .
3941                       "<td colspan=\"4\">$extra</td>\n" .
3942                       "</tr>\n";
3943         }
3944         print "</table>\n";
3945 }
3946
3947 sub git_history_body {
3948         # Warning: assumes constant type (blob or tree) during history
3949         my ($commitlist, $from, $to, $refs, $hash_base, $ftype, $extra) = @_;
3950
3951         $from = 0 unless defined $from;
3952         $to = $#{$commitlist} unless (defined $to && $to <= $#{$commitlist});
3953
3954         print "<table class=\"history\">\n";
3955         my $alternate = 1;
3956         for (my $i = $from; $i <= $to; $i++) {
3957                 my %co = %{$commitlist->[$i]};
3958                 if (!%co) {
3959                         next;
3960                 }
3961                 my $commit = $co{'id'};
3962
3963                 my $ref = format_ref_marker($refs, $commit);
3964
3965                 if ($alternate) {
3966                         print "<tr class=\"dark\">\n";
3967                 } else {
3968                         print "<tr class=\"light\">\n";
3969                 }
3970                 $alternate ^= 1;
3971         # shortlog uses      chop_str($co{'author_name'}, 10)
3972                 my $author = chop_and_escape_str($co{'author_name'}, 15, 3);
3973                 print "<td title=\"$co{'age_string_age'}\"><i>$co{'age_string_date'}</i></td>\n" .
3974                       "<td><i>" . $author . "</i></td>\n" .
3975                       "<td>";
3976                 # originally git_history used chop_str($co{'title'}, 50)
3977                 print format_subject_html($co{'title'}, $co{'title_short'},
3978                                           href(action=>"commit", hash=>$commit), $ref);
3979                 print "</td>\n" .
3980                       "<td class=\"link\">" .
3981                       $cgi->a({-href => href(action=>$ftype, hash_base=>$commit, file_name=>$file_name)}, $ftype) . " | " .
3982                       $cgi->a({-href => href(action=>"commitdiff", hash=>$commit)}, "commitdiff");
3983
3984                 if ($ftype eq 'blob') {
3985                         my $blob_current = git_get_hash_by_path($hash_base, $file_name);
3986                         my $blob_parent  = git_get_hash_by_path($commit, $file_name);
3987                         if (defined $blob_current && defined $blob_parent &&
3988                                         $blob_current ne $blob_parent) {
3989                                 print " | " .
3990                                         $cgi->a({-href => href(action=>"blobdiff",
3991                                                                hash=>$blob_current, hash_parent=>$blob_parent,
3992                                                                hash_base=>$hash_base, hash_parent_base=>$commit,
3993                                                                file_name=>$file_name)},
3994                                                 "diff to current");
3995                         }
3996                 }
3997                 print "</td>\n" .
3998                       "</tr>\n";
3999         }
4000         if (defined $extra) {
4001                 print "<tr>\n" .
4002                       "<td colspan=\"4\">$extra</td>\n" .
4003                       "</tr>\n";
4004         }
4005         print "</table>\n";
4006 }
4007
4008 sub git_tags_body {
4009         # uses global variable $project
4010         my ($taglist, $from, $to, $extra) = @_;
4011         $from = 0 unless defined $from;
4012         $to = $#{$taglist} if (!defined $to || $#{$taglist} < $to);
4013
4014         print "<table class=\"tags\">\n";
4015         my $alternate = 1;
4016         for (my $i = $from; $i <= $to; $i++) {
4017                 my $entry = $taglist->[$i];
4018                 my %tag = %$entry;
4019                 my $comment = $tag{'subject'};
4020                 my $comment_short;
4021                 if (defined $comment) {
4022                         $comment_short = chop_str($comment, 30, 5);
4023                 }
4024                 if ($alternate) {
4025                         print "<tr class=\"dark\">\n";
4026                 } else {
4027                         print "<tr class=\"light\">\n";
4028                 }
4029                 $alternate ^= 1;
4030                 if (defined $tag{'age'}) {
4031                         print "<td><i>$tag{'age'}</i></td>\n";
4032                 } else {
4033                         print "<td></td>\n";
4034                 }
4035                 print "<td>" .
4036                       $cgi->a({-href => href(action=>$tag{'reftype'}, hash=>$tag{'refid'}),
4037                                -class => "list name"}, esc_html($tag{'name'})) .
4038                       "</td>\n" .
4039                       "<td>";
4040                 if (defined $comment) {
4041                         print format_subject_html($comment, $comment_short,
4042                                                   href(action=>"tag", hash=>$tag{'id'}));
4043                 }
4044                 print "</td>\n" .
4045                       "<td class=\"selflink\">";
4046                 if ($tag{'type'} eq "tag") {
4047                         print $cgi->a({-href => href(action=>"tag", hash=>$tag{'id'})}, "tag");
4048                 } else {
4049                         print "&nbsp;";
4050                 }
4051                 print "</td>\n" .
4052                       "<td class=\"link\">" . " | " .
4053                       $cgi->a({-href => href(action=>$tag{'reftype'}, hash=>$tag{'refid'})}, $tag{'reftype'});
4054                 if ($tag{'reftype'} eq "commit") {
4055                         print " | " . $cgi->a({-href => href(action=>"shortlog", hash=>$tag{'fullname'})}, "shortlog") .
4056                               " | " . $cgi->a({-href => href(action=>"log", hash=>$tag{'fullname'})}, "log");
4057                 } elsif ($tag{'reftype'} eq "blob") {
4058                         print " | " . $cgi->a({-href => href(action=>"blob_plain", hash=>$tag{'refid'})}, "raw");
4059                 }
4060                 print "</td>\n" .
4061                       "</tr>";
4062         }
4063         if (defined $extra) {
4064                 print "<tr>\n" .
4065                       "<td colspan=\"5\">$extra</td>\n" .
4066                       "</tr>\n";
4067         }
4068         print "</table>\n";
4069 }
4070
4071 sub git_heads_body {
4072         # uses global variable $project
4073         my ($headlist, $head, $from, $to, $extra) = @_;
4074         $from = 0 unless defined $from;
4075         $to = $#{$headlist} if (!defined $to || $#{$headlist} < $to);
4076
4077         print "<table class=\"heads\">\n";
4078         my $alternate = 1;
4079         for (my $i = $from; $i <= $to; $i++) {
4080                 my $entry = $headlist->[$i];
4081                 my %ref = %$entry;
4082                 my $curr = $ref{'id'} eq $head;
4083                 if ($alternate) {
4084                         print "<tr class=\"dark\">\n";
4085                 } else {
4086                         print "<tr class=\"light\">\n";
4087                 }
4088                 $alternate ^= 1;
4089                 print "<td><i>$ref{'age'}</i></td>\n" .
4090                       ($curr ? "<td class=\"current_head\">" : "<td>") .
4091                       $cgi->a({-href => href(action=>"shortlog", hash=>$ref{'fullname'}),
4092                                -class => "list name"},esc_html($ref{'name'})) .
4093                       "</td>\n" .
4094                       "<td class=\"link\">" .
4095                       $cgi->a({-href => href(action=>"shortlog", hash=>$ref{'fullname'})}, "shortlog") . " | " .
4096                       $cgi->a({-href => href(action=>"log", hash=>$ref{'fullname'})}, "log") . " | " .
4097                       $cgi->a({-href => href(action=>"tree", hash=>$ref{'fullname'}, hash_base=>$ref{'name'})}, "tree") .
4098                       "</td>\n" .
4099                       "</tr>";
4100         }
4101         if (defined $extra) {
4102                 print "<tr>\n" .
4103                       "<td colspan=\"3\">$extra</td>\n" .
4104                       "</tr>\n";
4105         }
4106         print "</table>\n";
4107 }
4108
4109 sub git_search_grep_body {
4110         my ($commitlist, $from, $to, $extra) = @_;
4111         $from = 0 unless defined $from;
4112         $to = $#{$commitlist} if (!defined $to || $#{$commitlist} < $to);
4113
4114         print "<table class=\"commit_search\">\n";
4115         my $alternate = 1;
4116         for (my $i = $from; $i <= $to; $i++) {
4117                 my %co = %{$commitlist->[$i]};
4118                 if (!%co) {
4119                         next;
4120                 }
4121                 my $commit = $co{'id'};
4122                 if ($alternate) {
4123                         print "<tr class=\"dark\">\n";
4124                 } else {
4125                         print "<tr class=\"light\">\n";
4126                 }
4127                 $alternate ^= 1;
4128                 my $author = chop_and_escape_str($co{'author_name'}, 15, 5);
4129                 print "<td title=\"$co{'age_string_age'}\"><i>$co{'age_string_date'}</i></td>\n" .
4130                       "<td><i>" . $author . "</i></td>\n" .
4131                       "<td>" .
4132                       $cgi->a({-href => href(action=>"commit", hash=>$co{'id'}),
4133                                -class => "list subject"},
4134                               chop_and_escape_str($co{'title'}, 50) . "<br/>");
4135                 my $comment = $co{'comment'};
4136                 foreach my $line (@$comment) {
4137                         if ($line =~ m/^(.*?)($search_regexp)(.*)$/i) {
4138                                 my ($lead, $match, $trail) = ($1, $2, $3);
4139                                 $match = chop_str($match, 70, 5, 'center');
4140                                 my $contextlen = int((80 - length($match))/2);
4141                                 $contextlen = 30 if ($contextlen > 30);
4142                                 $lead  = chop_str($lead,  $contextlen, 10, 'left');
4143                                 $trail = chop_str($trail, $contextlen, 10, 'right');
4144
4145                                 $lead  = esc_html($lead);
4146                                 $match = esc_html($match);
4147                                 $trail = esc_html($trail);
4148
4149                                 print "$lead<span class=\"match\">$match</span>$trail<br />";
4150                         }
4151                 }
4152                 print "</td>\n" .
4153                       "<td class=\"link\">" .
4154                       $cgi->a({-href => href(action=>"commit", hash=>$co{'id'})}, "commit") .
4155                       " | " .
4156                       $cgi->a({-href => href(action=>"commitdiff", hash=>$co{'id'})}, "commitdiff") .
4157                       " | " .
4158                       $cgi->a({-href => href(action=>"tree", hash=>$co{'tree'}, hash_base=>$co{'id'})}, "tree");
4159                 print "</td>\n" .
4160                       "</tr>\n";
4161         }
4162         if (defined $extra) {
4163                 print "<tr>\n" .
4164                       "<td colspan=\"3\">$extra</td>\n" .
4165                       "</tr>\n";
4166         }
4167         print "</table>\n";
4168 }
4169
4170 ## ======================================================================
4171 ## ======================================================================
4172 ## actions
4173
4174 sub git_project_list {
4175         my $order = $input_params{'order'};
4176         if (defined $order && $order !~ m/none|project|descr|owner|age/) {
4177                 die_error(400, "Unknown order parameter");
4178         }
4179
4180         my @list = git_get_projects_list();
4181         if (!@list) {
4182                 die_error(404, "No projects found");
4183         }
4184
4185         git_header_html();
4186         if (-f $home_text) {
4187                 print "<div class=\"index_include\">\n";
4188                 open (my $fd, $home_text);
4189                 print <$fd>;
4190                 close $fd;
4191                 print "</div>\n";
4192         }
4193         print $cgi->startform(-method => "get") .
4194               "<p class=\"projsearch\">Search:\n" .
4195               $cgi->textfield(-name => "s", -value => $searchtext) . "\n" .
4196               "</p>" .
4197               $cgi->end_form() . "\n";
4198         git_project_list_body(\@list, $order);
4199         git_footer_html();
4200 }
4201
4202 sub git_forks {
4203         my $order = $input_params{'order'};
4204         if (defined $order && $order !~ m/none|project|descr|owner|age/) {
4205                 die_error(400, "Unknown order parameter");
4206         }
4207
4208         my @list = git_get_projects_list($project);
4209         if (!@list) {
4210                 die_error(404, "No forks found");
4211         }
4212
4213         git_header_html();
4214         git_print_page_nav('','');
4215         git_print_header_div('summary', "$project forks");
4216         git_project_list_body(\@list, $order);
4217         git_footer_html();
4218 }
4219
4220 sub git_project_index {
4221         my @projects = git_get_projects_list($project);
4222
4223         print $cgi->header(
4224                 -type => 'text/plain',
4225                 -charset => 'utf-8',
4226                 -content_disposition => 'inline; filename="index.aux"');
4227
4228         foreach my $pr (@projects) {
4229                 if (!exists $pr->{'owner'}) {
4230                         $pr->{'owner'} = git_get_project_owner("$pr->{'path'}");
4231                 }
4232
4233                 my ($path, $owner) = ($pr->{'path'}, $pr->{'owner'});
4234                 # quote as in CGI::Util::encode, but keep the slash, and use '+' for ' '
4235                 $path  =~ s/([^a-zA-Z0-9_.\-\/ ])/sprintf("%%%02X", ord($1))/eg;
4236                 $owner =~ s/([^a-zA-Z0-9_.\-\/ ])/sprintf("%%%02X", ord($1))/eg;
4237                 $path  =~ s/ /\+/g;
4238                 $owner =~ s/ /\+/g;
4239
4240                 print "$path $owner\n";
4241         }
4242 }
4243
4244 sub git_summary {
4245         my $descr = git_get_project_description($project) || "none";
4246         my %co = parse_commit("HEAD");
4247         my %cd = %co ? parse_date($co{'committer_epoch'}, $co{'committer_tz'}) : ();
4248         my $head = $co{'id'};
4249
4250         my $owner = git_get_project_owner($project);
4251
4252         my $refs = git_get_references();
4253         # These get_*_list functions return one more to allow us to see if
4254         # there are more ...
4255         my @taglist  = git_get_tags_list(16);
4256         my @headlist = git_get_heads_list(16);
4257         my @forklist;
4258         my ($check_forks) = gitweb_check_feature('forks');
4259
4260         if ($check_forks) {
4261                 @forklist = git_get_projects_list($project);
4262         }
4263
4264         git_header_html();
4265         git_print_page_nav('summary','', $head);
4266
4267         print "<div class=\"title\">&nbsp;</div>\n";
4268         print "<table class=\"projects_list\">\n" .
4269               "<tr id=\"metadata_desc\"><td>description</td><td>" . esc_html($descr) . "</td></tr>\n" .
4270               "<tr id=\"metadata_owner\"><td>owner</td><td>" . esc_html($owner) . "</td></tr>\n";
4271         if (defined $cd{'rfc2822'}) {
4272                 print "<tr id=\"metadata_lchange\"><td>last change</td><td>$cd{'rfc2822'}</td></tr>\n";
4273         }
4274
4275         # use per project git URL list in $projectroot/$project/cloneurl
4276         # or make project git URL from git base URL and project name
4277         my $url_tag = "URL";
4278         my @url_list = git_get_project_url_list($project);
4279         @url_list = map { "$_/$project" } @git_base_url_list unless @url_list;
4280         foreach my $git_url (@url_list) {
4281                 next unless $git_url;
4282                 print "<tr class=\"metadata_url\"><td>$url_tag</td><td>$git_url</td></tr>\n";
4283                 $url_tag = "";
4284         }
4285
4286         # Tag cloud
4287         my $show_ctags = (gitweb_check_feature('ctags'))[0];
4288         if ($show_ctags) {
4289                 my $ctags = git_get_project_ctags($project);
4290                 my $cloud = git_populate_project_tagcloud($ctags);
4291                 print "<tr id=\"metadata_ctags\"><td>Content tags:<br />";
4292                 print "</td>\n<td>" unless %$ctags;
4293                 print "<form action=\"$show_ctags\" method=\"post\"><input type=\"hidden\" name=\"p\" value=\"$project\" />Add: <input type=\"text\" name=\"t\" size=\"8\" /></form>";
4294                 print "</td>\n<td>" if %$ctags;
4295                 print git_show_project_tagcloud($cloud, 48);
4296                 print "</td></tr>";
4297         }
4298
4299         print "</table>\n";
4300
4301         if (-s "$projectroot/$project/README.html") {
4302                 if (open my $fd, "$projectroot/$project/README.html") {
4303                         print "<div class=\"title\">readme</div>\n" .
4304                               "<div class=\"readme\">\n";
4305                         print $_ while (<$fd>);
4306                         print "\n</div>\n"; # class="readme"
4307                         close $fd;
4308                 }
4309         }
4310
4311         # we need to request one more than 16 (0..15) to check if
4312         # those 16 are all
4313         my @commitlist = $head ? parse_commits($head, 17) : ();
4314         if (@commitlist) {
4315                 git_print_header_div('shortlog');
4316                 git_shortlog_body(\@commitlist, 0, 15, $refs,
4317                                   $#commitlist <=  15 ? undef :
4318                                   $cgi->a({-href => href(action=>"shortlog")}, "..."));
4319         }
4320
4321         if (@taglist) {
4322                 git_print_header_div('tags');
4323                 git_tags_body(\@taglist, 0, 15,
4324                               $#taglist <=  15 ? undef :
4325                               $cgi->a({-href => href(action=>"tags")}, "..."));
4326         }
4327
4328         if (@headlist) {
4329                 git_print_header_div('heads');
4330                 git_heads_body(\@headlist, $head, 0, 15,
4331                                $#headlist <= 15 ? undef :
4332                                $cgi->a({-href => href(action=>"heads")}, "..."));
4333         }
4334
4335         if (@forklist) {
4336                 git_print_header_div('forks');
4337                 git_project_list_body(\@forklist, 'age', 0, 15,
4338                                       $#forklist <= 15 ? undef :
4339                                       $cgi->a({-href => href(action=>"forks")}, "..."),
4340                                       'no_header');
4341         }
4342
4343         git_footer_html();
4344 }
4345
4346 sub git_tag {
4347         my $head = git_get_head_hash($project);
4348         git_header_html();
4349         git_print_page_nav('','', $head,undef,$head);
4350         my %tag = parse_tag($hash);
4351
4352         if (! %tag) {
4353                 die_error(404, "Unknown tag object");
4354         }
4355
4356         git_print_header_div('commit', esc_html($tag{'name'}), $hash);
4357         print "<div class=\"title_text\">\n" .
4358               "<table class=\"object_header\">\n" .
4359               "<tr>\n" .
4360               "<td>object</td>\n" .
4361               "<td>" . $cgi->a({-class => "list", -href => href(action=>$tag{'type'}, hash=>$tag{'object'})},
4362                                $tag{'object'}) . "</td>\n" .
4363               "<td class=\"link\">" . $cgi->a({-href => href(action=>$tag{'type'}, hash=>$tag{'object'})},
4364                                               $tag{'type'}) . "</td>\n" .
4365               "</tr>\n";
4366         if (defined($tag{'author'})) {
4367                 my %ad = parse_date($tag{'epoch'}, $tag{'tz'});
4368                 print "<tr><td>author</td><td>" . esc_html($tag{'author'}) . "</td></tr>\n";
4369                 print "<tr><td></td><td>" . $ad{'rfc2822'} .
4370                         sprintf(" (%02d:%02d %s)", $ad{'hour_local'}, $ad{'minute_local'}, $ad{'tz_local'}) .
4371                         "</td></tr>\n";
4372         }
4373         print "</table>\n\n" .
4374               "</div>\n";
4375         print "<div class=\"page_body\">";
4376         my $comment = $tag{'comment'};
4377         foreach my $line (@$comment) {
4378                 chomp $line;
4379                 print esc_html($line, -nbsp=>1) . "<br/>\n";
4380         }
4381         print "</div>\n";
4382         git_footer_html();
4383 }
4384
4385 sub git_blame {
4386         my $fd;
4387         my $ftype;
4388
4389         gitweb_check_feature('blame')
4390             or die_error(403, "Blame view not allowed");
4391
4392         die_error(400, "No file name given") unless $file_name;
4393         $hash_base ||= git_get_head_hash($project);
4394         die_error(404, "Couldn't find base commit") unless ($hash_base);
4395         my %co = parse_commit($hash_base)
4396                 or die_error(404, "Commit not found");
4397         if (!defined $hash) {
4398                 $hash = git_get_hash_by_path($hash_base, $file_name, "blob")
4399                         or die_error(404, "Error looking up file");
4400         }
4401         $ftype = git_get_type($hash);
4402         if ($ftype !~ "blob") {
4403                 die_error(400, "Object is not a blob");
4404         }
4405         open ($fd, "-|", git_cmd(), "blame", '-p', '--',
4406               $file_name, $hash_base)
4407                 or die_error(500, "Open git-blame failed");
4408         git_header_html();
4409         my $formats_nav =
4410                 $cgi->a({-href => href(action=>"blob", -replay=>1)},
4411                         "blob") .
4412                 " | " .
4413                 $cgi->a({-href => href(action=>"history", -replay=>1)},
4414                         "history") .
4415                 " | " .
4416                 $cgi->a({-href => href(action=>"blame", file_name=>$file_name)},
4417                         "HEAD");
4418         git_print_page_nav('','', $hash_base,$co{'tree'},$hash_base, $formats_nav);
4419         git_print_header_div('commit', esc_html($co{'title'}), $hash_base);
4420         git_print_page_path($file_name, $ftype, $hash_base);
4421         my @rev_color = (qw(light2 dark2));
4422         my $num_colors = scalar(@rev_color);
4423         my $current_color = 0;
4424         my $last_rev;
4425         print <<HTML;
4426 <div class="page_body">
4427 <table class="blame">
4428 <tr><th>Commit</th><th>Line</th><th>Data</th></tr>
4429 HTML
4430         my %metainfo = ();
4431         while (1) {
4432                 $_ = <$fd>;
4433                 last unless defined $_;
4434                 my ($full_rev, $orig_lineno, $lineno, $group_size) =
4435                     /^([0-9a-f]{40}) (\d+) (\d+)(?: (\d+))?$/;
4436                 if (!exists $metainfo{$full_rev}) {
4437                         $metainfo{$full_rev} = {};
4438                 }
4439                 my $meta = $metainfo{$full_rev};
4440                 while (<$fd>) {
4441                         last if (s/^\t//);
4442                         if (/^(\S+) (.*)$/) {
4443                                 $meta->{$1} = $2;
4444                         }
4445                 }
4446                 my $data = $_;
4447                 chomp $data;
4448                 my $rev = substr($full_rev, 0, 8);
4449                 my $author = $meta->{'author'};
4450                 my %date = parse_date($meta->{'author-time'},
4451                                       $meta->{'author-tz'});
4452                 my $date = $date{'iso-tz'};
4453                 if ($group_size) {
4454                         $current_color = ++$current_color % $num_colors;
4455                 }
4456                 print "<tr class=\"$rev_color[$current_color]\">\n";
4457                 if ($group_size) {
4458                         print "<td class=\"sha1\"";
4459                         print " title=\"". esc_html($author) . ", $date\"";
4460                         print " rowspan=\"$group_size\"" if ($group_size > 1);
4461                         print ">";
4462                         print $cgi->a({-href => href(action=>"commit",
4463                                                      hash=>$full_rev,
4464                                                      file_name=>$file_name)},
4465                                       esc_html($rev));
4466                         print "</td>\n";
4467                 }
4468                 open (my $dd, "-|", git_cmd(), "rev-parse", "$full_rev^")
4469                         or die_error(500, "Open git-rev-parse failed");
4470                 my $parent_commit = <$dd>;
4471                 close $dd;
4472                 chomp($parent_commit);
4473                 my $blamed = href(action => 'blame',
4474                                   file_name => $meta->{'filename'},
4475                                   hash_base => $parent_commit);
4476                 print "<td class=\"linenr\">";
4477                 print $cgi->a({ -href => "$blamed#l$orig_lineno",
4478                                 -id => "l$lineno",
4479                                 -class => "linenr" },
4480                               esc_html($lineno));
4481                 print "</td>";
4482                 print "<td class=\"pre\">" . esc_html($data) . "</td>\n";
4483                 print "</tr>\n";
4484         }
4485         print "</table>\n";
4486         print "</div>";
4487         close $fd
4488                 or print "Reading blob failed\n";
4489         git_footer_html();
4490 }
4491
4492 sub git_tags {
4493         my $head = git_get_head_hash($project);
4494         git_header_html();
4495         git_print_page_nav('','', $head,undef,$head);
4496         git_print_header_div('summary', $project);
4497
4498         my @tagslist = git_get_tags_list();
4499         if (@tagslist) {
4500                 git_tags_body(\@tagslist);
4501         }
4502         git_footer_html();
4503 }
4504
4505 sub git_heads {
4506         my $head = git_get_head_hash($project);
4507         git_header_html();
4508         git_print_page_nav('','', $head,undef,$head);
4509         git_print_header_div('summary', $project);
4510
4511         my @headslist = git_get_heads_list();
4512         if (@headslist) {
4513                 git_heads_body(\@headslist, $head);
4514         }
4515         git_footer_html();
4516 }
4517
4518 sub git_blob_plain {
4519         my $type = shift;
4520         my $expires;
4521
4522         if (!defined $hash) {
4523                 if (defined $file_name) {
4524                         my $base = $hash_base || git_get_head_hash($project);
4525                         $hash = git_get_hash_by_path($base, $file_name, "blob")
4526                                 or die_error(404, "Cannot find file");
4527                 } else {
4528                         die_error(400, "No file name defined");
4529                 }
4530         } elsif ($hash =~ m/^[0-9a-fA-F]{40}$/) {
4531                 # blobs defined by non-textual hash id's can be cached
4532                 $expires = "+1d";
4533         }
4534
4535         open my $fd, "-|", git_cmd(), "cat-file", "blob", $hash
4536                 or die_error(500, "Open git-cat-file blob '$hash' failed");
4537
4538         # content-type (can include charset)
4539         $type = blob_contenttype($fd, $file_name, $type);
4540
4541         # "save as" filename, even when no $file_name is given
4542         my $save_as = "$hash";
4543         if (defined $file_name) {
4544                 $save_as = $file_name;
4545         } elsif ($type =~ m/^text\//) {
4546                 $save_as .= '.txt';
4547         }
4548
4549         print $cgi->header(
4550                 -type => $type,
4551                 -expires => $expires,
4552                 -content_disposition => 'inline; filename="' . $save_as . '"');
4553         undef $/;
4554         binmode STDOUT, ':raw';
4555         print <$fd>;
4556         binmode STDOUT, ':utf8'; # as set at the beginning of gitweb.cgi
4557         $/ = "\n";
4558         close $fd;
4559 }
4560
4561 sub git_blob {
4562         my $expires;
4563
4564         if (!defined $hash) {
4565                 if (defined $file_name) {
4566                         my $base = $hash_base || git_get_head_hash($project);
4567                         $hash = git_get_hash_by_path($base, $file_name, "blob")
4568                                 or die_error(404, "Cannot find file");
4569                 } else {
4570                         die_error(400, "No file name defined");
4571                 }
4572         } elsif ($hash =~ m/^[0-9a-fA-F]{40}$/) {
4573                 # blobs defined by non-textual hash id's can be cached
4574                 $expires = "+1d";
4575         }
4576
4577         my ($have_blame) = gitweb_check_feature('blame');
4578         open my $fd, "-|", git_cmd(), "cat-file", "blob", $hash
4579                 or die_error(500, "Couldn't cat $file_name, $hash");
4580         my $mimetype = blob_mimetype($fd, $file_name);
4581         if ($mimetype !~ m!^(?:text/|image/(?:gif|png|jpeg)$)! && -B $fd) {
4582                 close $fd;
4583                 return git_blob_plain($mimetype);
4584         }
4585         # we can have blame only for text/* mimetype
4586         $have_blame &&= ($mimetype =~ m!^text/!);
4587
4588         git_header_html(undef, $expires);
4589         my $formats_nav = '';
4590         if (defined $hash_base && (my %co = parse_commit($hash_base))) {
4591                 if (defined $file_name) {
4592                         if ($have_blame) {
4593                                 $formats_nav .=
4594                                         $cgi->a({-href => href(action=>"blame", -replay=>1)},
4595                                                 "blame") .
4596                                         " | ";
4597                         }
4598                         $formats_nav .=
4599                                 $cgi->a({-href => href(action=>"history", -replay=>1)},
4600                                         "history") .
4601                                 " | " .
4602                                 $cgi->a({-href => href(action=>"blob_plain", -replay=>1)},
4603                                         "raw") .
4604                                 " | " .
4605                                 $cgi->a({-href => href(action=>"blob",
4606                                                        hash_base=>"HEAD", file_name=>$file_name)},
4607                                         "HEAD");
4608                 } else {
4609                         $formats_nav .=
4610                                 $cgi->a({-href => href(action=>"blob_plain", -replay=>1)},
4611                                         "raw");
4612                 }
4613                 git_print_page_nav('','', $hash_base,$co{'tree'},$hash_base, $formats_nav);
4614                 git_print_header_div('commit', esc_html($co{'title'}), $hash_base);
4615         } else {
4616                 print "<div class=\"page_nav\">\n" .
4617                       "<br/><br/></div>\n" .
4618                       "<div class=\"title\">$hash</div>\n";
4619         }
4620         git_print_page_path($file_name, "blob", $hash_base);
4621         print "<div class=\"page_body\">\n";
4622         if ($mimetype =~ m!^image/!) {
4623                 print qq!<img type="$mimetype"!;
4624                 if ($file_name) {
4625                         print qq! alt="$file_name" title="$file_name"!;
4626                 }
4627                 print qq! src="! .
4628                       href(action=>"blob_plain", hash=>$hash,
4629                            hash_base=>$hash_base, file_name=>$file_name) .
4630                       qq!" />\n!;
4631         } else {
4632                 my $nr;
4633                 while (my $line = <$fd>) {
4634                         chomp $line;
4635                         $nr++;
4636                         $line = untabify($line);
4637                         printf "<div class=\"pre\"><a id=\"l%i\" href=\"#l%i\" class=\"linenr\">%4i</a> %s</div>\n",
4638                                $nr, $nr, $nr, esc_html($line, -nbsp=>1);
4639                 }
4640         }
4641         close $fd
4642                 or print "Reading blob failed.\n";
4643         print "</div>";
4644         git_footer_html();
4645 }
4646
4647 sub git_tree {
4648         if (!defined $hash_base) {
4649                 $hash_base = "HEAD";
4650         }
4651         if (!defined $hash) {
4652                 if (defined $file_name) {
4653                         $hash = git_get_hash_by_path($hash_base, $file_name, "tree");
4654                 } else {
4655                         $hash = $hash_base;
4656                 }
4657         }
4658         die_error(404, "No such tree") unless defined($hash);
4659         $/ = "\0";
4660         open my $fd, "-|", git_cmd(), "ls-tree", '-z', $hash
4661                 or die_error(500, "Open git-ls-tree failed");
4662         my @entries = map { chomp; $_ } <$fd>;
4663         close $fd or die_error(404, "Reading tree failed");
4664         $/ = "\n";
4665
4666         my $refs = git_get_references();
4667         my $ref = format_ref_marker($refs, $hash_base);
4668         git_header_html();
4669         my $basedir = '';
4670         my ($have_blame) = gitweb_check_feature('blame');
4671         if (defined $hash_base && (my %co = parse_commit($hash_base))) {
4672                 my @views_nav = ();
4673                 if (defined $file_name) {
4674                         push @views_nav,
4675                                 $cgi->a({-href => href(action=>"history", -replay=>1)},
4676                                         "history"),
4677                                 $cgi->a({-href => href(action=>"tree",
4678                                                        hash_base=>"HEAD", file_name=>$file_name)},
4679                                         "HEAD"),
4680                 }
4681                 my $snapshot_links = format_snapshot_links($hash);
4682                 if (defined $snapshot_links) {
4683                         # FIXME: Should be available when we have no hash base as well.
4684                         push @views_nav, $snapshot_links;
4685                 }
4686                 git_print_page_nav('tree','', $hash_base, undef, undef, join(' | ', @views_nav));
4687                 git_print_header_div('commit', esc_html($co{'title'}) . $ref, $hash_base);
4688         } else {
4689                 undef $hash_base;
4690                 print "<div class=\"page_nav\">\n";
4691                 print "<br/><br/></div>\n";
4692                 print "<div class=\"title\">$hash</div>\n";
4693         }
4694         if (defined $file_name) {
4695                 $basedir = $file_name;
4696                 if ($basedir ne '' && substr($basedir, -1) ne '/') {
4697                         $basedir .= '/';
4698                 }
4699                 git_print_page_path($file_name, 'tree', $hash_base);
4700         }
4701         print "<div class=\"page_body\">\n";
4702         print "<table class=\"tree\">\n";
4703         my $alternate = 1;
4704         # '..' (top directory) link if possible
4705         if (defined $hash_base &&
4706             defined $file_name && $file_name =~ m![^/]+$!) {
4707                 if ($alternate) {
4708                         print "<tr class=\"dark\">\n";
4709                 } else {
4710                         print "<tr class=\"light\">\n";
4711                 }
4712                 $alternate ^= 1;
4713
4714                 my $up = $file_name;
4715                 $up =~ s!/?[^/]+$!!;
4716                 undef $up unless $up;
4717                 # based on git_print_tree_entry
4718                 print '<td class="mode">' . mode_str('040000') . "</td>\n";
4719                 print '<td class="list">';
4720                 print $cgi->a({-href => href(action=>"tree", hash_base=>$hash_base,
4721                                              file_name=>$up)},
4722                               "..");
4723                 print "</td>\n";
4724                 print "<td class=\"link\"></td>\n";
4725
4726                 print "</tr>\n";
4727         }
4728         foreach my $line (@entries) {
4729                 my %t = parse_ls_tree_line($line, -z => 1);
4730
4731                 if ($alternate) {
4732                         print "<tr class=\"dark\">\n";
4733                 } else {
4734                         print "<tr class=\"light\">\n";
4735                 }
4736                 $alternate ^= 1;
4737
4738                 git_print_tree_entry(\%t, $basedir, $hash_base, $have_blame);
4739
4740                 print "</tr>\n";
4741         }
4742         print "</table>\n" .
4743               "</div>";
4744         git_footer_html();
4745 }
4746
4747 sub git_snapshot {
4748         my @supported_fmts = gitweb_check_feature('snapshot');
4749         @supported_fmts = filter_snapshot_fmts(@supported_fmts);
4750
4751         my $format = $input_params{'snapshot_format'};
4752         if (!@supported_fmts) {
4753                 die_error(403, "Snapshots not allowed");
4754         }
4755         # default to first supported snapshot format
4756         $format ||= $supported_fmts[0];
4757         if ($format !~ m/^[a-z0-9]+$/) {
4758                 die_error(400, "Invalid snapshot format parameter");
4759         } elsif (!exists($known_snapshot_formats{$format})) {
4760                 die_error(400, "Unknown snapshot format");
4761         } elsif (!grep($_ eq $format, @supported_fmts)) {
4762                 die_error(403, "Unsupported snapshot format");
4763         }
4764
4765         if (!defined $hash) {
4766                 $hash = git_get_head_hash($project);
4767         }
4768
4769         my $name = $project;
4770         $name =~ s,([^/])/*\.git$,$1,;
4771         $name = basename($name);
4772         my $filename = to_utf8($name);
4773         $name =~ s/\047/\047\\\047\047/g;
4774         my $cmd;
4775         $filename .= "-$hash$known_snapshot_formats{$format}{'suffix'}";
4776         $cmd = quote_command(
4777                 git_cmd(), 'archive',
4778                 "--format=$known_snapshot_formats{$format}{'format'}",
4779                 "--prefix=$name/", $hash);
4780         if (exists $known_snapshot_formats{$format}{'compressor'}) {
4781                 $cmd .= ' | ' . quote_command(@{$known_snapshot_formats{$format}{'compressor'}});
4782         }
4783
4784         print $cgi->header(
4785                 -type => $known_snapshot_formats{$format}{'type'},
4786                 -content_disposition => 'inline; filename="' . "$filename" . '"',
4787                 -status => '200 OK');
4788
4789         open my $fd, "-|", $cmd
4790                 or die_error(500, "Execute git-archive failed");
4791         binmode STDOUT, ':raw';
4792         print <$fd>;
4793         binmode STDOUT, ':utf8'; # as set at the beginning of gitweb.cgi
4794         close $fd;
4795 }
4796
4797 sub git_log {
4798         my $head = git_get_head_hash($project);
4799         if (!defined $hash) {
4800                 $hash = $head;
4801         }
4802         if (!defined $page) {
4803                 $page = 0;
4804         }
4805         my $refs = git_get_references();
4806
4807         my @commitlist = parse_commits($hash, 101, (100 * $page));
4808
4809         my $paging_nav = format_paging_nav('log', $hash, $head, $page, $#commitlist >= 100);
4810
4811         git_header_html();
4812         git_print_page_nav('log','', $hash,undef,undef, $paging_nav);
4813
4814         if (!@commitlist) {
4815                 my %co = parse_commit($hash);
4816
4817                 git_print_header_div('summary', $project);
4818                 print "<div class=\"page_body\"> Last change $co{'age_string'}.<br/><br/></div>\n";
4819         }
4820         my $to = ($#commitlist >= 99) ? (99) : ($#commitlist);
4821         for (my $i = 0; $i <= $to; $i++) {
4822                 my %co = %{$commitlist[$i]};
4823                 next if !%co;
4824                 my $commit = $co{'id'};
4825                 my $ref = format_ref_marker($refs, $commit);
4826                 my %ad = parse_date($co{'author_epoch'});
4827                 git_print_header_div('commit',
4828                                "<span class=\"age\">$co{'age_string'}</span>" .
4829                                esc_html($co{'title'}) . $ref,
4830                                $commit);
4831                 print "<div class=\"title_text\">\n" .
4832                       "<div class=\"log_link\">\n" .
4833                       $cgi->a({-href => href(action=>"commit", hash=>$commit)}, "commit") .
4834                       " | " .
4835                       $cgi->a({-href => href(action=>"commitdiff", hash=>$commit)}, "commitdiff") .
4836                       " | " .
4837                       $cgi->a({-href => href(action=>"tree", hash=>$commit, hash_base=>$commit)}, "tree") .
4838                       "<br/>\n" .
4839                       "</div>\n" .
4840                       "<i>" . esc_html($co{'author_name'}) .  " [$ad{'rfc2822'}]</i><br/>\n" .
4841                       "</div>\n";
4842
4843                 print "<div class=\"log_body\">\n";
4844                 git_print_log($co{'comment'}, -final_empty_line=> 1);
4845                 print "</div>\n";
4846         }
4847         if ($#commitlist >= 100) {
4848                 print "<div class=\"page_nav\">\n";
4849                 print $cgi->a({-href => href(-replay=>1, page=>$page+1),
4850                                -accesskey => "n", -title => "Alt-n"}, "next");
4851                 print "</div>\n";
4852         }
4853         git_footer_html();
4854 }
4855
4856 sub git_commit {
4857         $hash ||= $hash_base || "HEAD";
4858         my %co = parse_commit($hash)
4859             or die_error(404, "Unknown commit object");
4860         my %ad = parse_date($co{'author_epoch'}, $co{'author_tz'});
4861         my %cd = parse_date($co{'committer_epoch'}, $co{'committer_tz'});
4862
4863         my $parent  = $co{'parent'};
4864         my $parents = $co{'parents'}; # listref
4865
4866         # we need to prepare $formats_nav before any parameter munging
4867         my $formats_nav;
4868         if (!defined $parent) {
4869                 # --root commitdiff
4870                 $formats_nav .= '(initial)';
4871         } elsif (@$parents == 1) {
4872                 # single parent commit
4873                 $formats_nav .=
4874                         '(parent: ' .
4875                         $cgi->a({-href => href(action=>"commit",
4876                                                hash=>$parent)},
4877                                 esc_html(substr($parent, 0, 7))) .
4878                         ')';
4879         } else {
4880                 # merge commit
4881                 $formats_nav .=
4882                         '(merge: ' .
4883                         join(' ', map {
4884                                 $cgi->a({-href => href(action=>"commit",
4885                                                        hash=>$_)},
4886                                         esc_html(substr($_, 0, 7)));
4887                         } @$parents ) .
4888                         ')';
4889         }
4890
4891         if (!defined $parent) {
4892                 $parent = "--root";
4893         }
4894         my @difftree;
4895         open my $fd, "-|", git_cmd(), "diff-tree", '-r', "--no-commit-id",
4896                 @diff_opts,
4897                 (@$parents <= 1 ? $parent : '-c'),
4898                 $hash, "--"
4899                 or die_error(500, "Open git-diff-tree failed");
4900         @difftree = map { chomp; $_ } <$fd>;
4901         close $fd or die_error(404, "Reading git-diff-tree failed");
4902
4903         # non-textual hash id's can be cached
4904         my $expires;
4905         if ($hash =~ m/^[0-9a-fA-F]{40}$/) {
4906                 $expires = "+1d";
4907         }
4908         my $refs = git_get_references();
4909         my $ref = format_ref_marker($refs, $co{'id'});
4910
4911         git_header_html(undef, $expires);
4912         git_print_page_nav('commit', '',
4913                            $hash, $co{'tree'}, $hash,
4914                            $formats_nav);
4915
4916         if (defined $co{'parent'}) {
4917                 git_print_header_div('commitdiff', esc_html($co{'title'}) . $ref, $hash);
4918         } else {
4919                 git_print_header_div('tree', esc_html($co{'title'}) . $ref, $co{'tree'}, $hash);
4920         }
4921         print "<div class=\"title_text\">\n" .
4922               "<table class=\"object_header\">\n";
4923         print "<tr><td>author</td><td>" . esc_html($co{'author'}) . "</td></tr>\n".
4924               "<tr>" .
4925               "<td></td><td> $ad{'rfc2822'}";
4926         if ($ad{'hour_local'} < 6) {
4927                 printf(" (<span class=\"atnight\">%02d:%02d</span> %s)",
4928                        $ad{'hour_local'}, $ad{'minute_local'}, $ad{'tz_local'});
4929         } else {
4930                 printf(" (%02d:%02d %s)",
4931                        $ad{'hour_local'}, $ad{'minute_local'}, $ad{'tz_local'});
4932         }
4933         print "</td>" .
4934               "</tr>\n";
4935         print "<tr><td>committer</td><td>" . esc_html($co{'committer'}) . "</td></tr>\n";
4936         print "<tr><td></td><td> $cd{'rfc2822'}" .
4937               sprintf(" (%02d:%02d %s)", $cd{'hour_local'}, $cd{'minute_local'}, $cd{'tz_local'}) .
4938               "</td></tr>\n";
4939         print "<tr><td>commit</td><td class=\"sha1\">$co{'id'}</td></tr>\n";
4940         print "<tr>" .
4941               "<td>tree</td>" .
4942               "<td class=\"sha1\">" .
4943               $cgi->a({-href => href(action=>"tree", hash=>$co{'tree'}, hash_base=>$hash),
4944                        class => "list"}, $co{'tree'}) .
4945               "</td>" .
4946               "<td class=\"link\">" .
4947               $cgi->a({-href => href(action=>"tree", hash=>$co{'tree'}, hash_base=>$hash)},
4948                       "tree");
4949         my $snapshot_links = format_snapshot_links($hash);
4950         if (defined $snapshot_links) {
4951                 print " | " . $snapshot_links;
4952         }
4953         print "</td>" .
4954               "</tr>\n";
4955
4956         foreach my $par (@$parents) {
4957                 print "<tr>" .
4958                       "<td>parent</td>" .
4959                       "<td class=\"sha1\">" .
4960                       $cgi->a({-href => href(action=>"commit", hash=>$par),
4961                                class => "list"}, $par) .
4962                       "</td>" .
4963                       "<td class=\"link\">" .
4964                       $cgi->a({-href => href(action=>"commit", hash=>$par)}, "commit") .
4965                       " | " .
4966                       $cgi->a({-href => href(action=>"commitdiff", hash=>$hash, hash_parent=>$par)}, "diff") .
4967                       "</td>" .
4968                       "</tr>\n";
4969         }
4970         print "</table>".
4971               "</div>\n";
4972
4973         print "<div class=\"page_body\">\n";
4974         git_print_log($co{'comment'});
4975         print "</div>\n";
4976
4977         git_difftree_body(\@difftree, $hash, @$parents);
4978
4979         git_footer_html();
4980 }
4981
4982 sub git_object {
4983         # object is defined by:
4984         # - hash or hash_base alone
4985         # - hash_base and file_name
4986         my $type;
4987
4988         # - hash or hash_base alone
4989         if ($hash || ($hash_base && !defined $file_name)) {
4990                 my $object_id = $hash || $hash_base;
4991
4992                 open my $fd, "-|", quote_command(
4993                         git_cmd(), 'cat-file', '-t', $object_id) . ' 2> /dev/null'
4994                         or die_error(404, "Object does not exist");
4995                 $type = <$fd>;
4996                 chomp $type;
4997                 close $fd
4998                         or die_error(404, "Object does not exist");
4999
5000         # - hash_base and file_name
5001         } elsif ($hash_base && defined $file_name) {
5002                 $file_name =~ s,/+$,,;
5003
5004                 system(git_cmd(), "cat-file", '-e', $hash_base) == 0
5005                         or die_error(404, "Base object does not exist");
5006
5007                 # here errors should not hapen
5008                 open my $fd, "-|", git_cmd(), "ls-tree", $hash_base, "--", $file_name
5009                         or die_error(500, "Open git-ls-tree failed");
5010                 my $line = <$fd>;
5011                 close $fd;
5012
5013                 #'100644 blob 0fa3f3a66fb6a137f6ec2c19351ed4d807070ffa  panic.c'
5014                 unless ($line && $line =~ m/^([0-9]+) (.+) ([0-9a-fA-F]{40})\t/) {
5015                         die_error(404, "File or directory for given base does not exist");
5016                 }
5017                 $type = $2;
5018                 $hash = $3;
5019         } else {
5020                 die_error(400, "Not enough information to find object");
5021         }
5022
5023         print $cgi->redirect(-uri => href(action=>$type, -full=>1,
5024                                           hash=>$hash, hash_base=>$hash_base,
5025                                           file_name=>$file_name),
5026                              -status => '302 Found');
5027 }
5028
5029 sub git_blobdiff {
5030         my $format = shift || 'html';
5031
5032         my $fd;
5033         my @difftree;
5034         my %diffinfo;
5035         my $expires;
5036
5037         # preparing $fd and %diffinfo for git_patchset_body
5038         # new style URI
5039         if (defined $hash_base && defined $hash_parent_base) {
5040                 if (defined $file_name) {
5041                         # read raw output
5042                         open $fd, "-|", git_cmd(), "diff-tree", '-r', @diff_opts,
5043                                 $hash_parent_base, $hash_base,
5044                                 "--", (defined $file_parent ? $file_parent : ()), $file_name
5045                                 or die_error(500, "Open git-diff-tree failed");
5046                         @difftree = map { chomp; $_ } <$fd>;
5047                         close $fd
5048                                 or die_error(404, "Reading git-diff-tree failed");
5049                         @difftree
5050                                 or die_error(404, "Blob diff not found");
5051
5052                 } elsif (defined $hash &&
5053                          $hash =~ /[0-9a-fA-F]{40}/) {
5054                         # try to find filename from $hash
5055
5056                         # read filtered raw output
5057                         open $fd, "-|", git_cmd(), "diff-tree", '-r', @diff_opts,
5058                                 $hash_parent_base, $hash_base, "--"
5059                                 or die_error(500, "Open git-diff-tree failed");
5060                         @difftree =
5061                                 # ':100644 100644 03b21826... 3b93d5e7... M     ls-files.c'
5062                                 # $hash == to_id
5063                                 grep { /^:[0-7]{6} [0-7]{6} [0-9a-fA-F]{40} $hash/ }
5064                                 map { chomp; $_ } <$fd>;
5065                         close $fd
5066                                 or die_error(404, "Reading git-diff-tree failed");
5067                         @difftree
5068                                 or die_error(404, "Blob diff not found");
5069
5070                 } else {
5071                         die_error(400, "Missing one of the blob diff parameters");
5072                 }
5073
5074                 if (@difftree > 1) {
5075                         die_error(400, "Ambiguous blob diff specification");
5076                 }
5077
5078                 %diffinfo = parse_difftree_raw_line($difftree[0]);
5079                 $file_parent ||= $diffinfo{'from_file'} || $file_name;
5080                 $file_name   ||= $diffinfo{'to_file'};
5081
5082                 $hash_parent ||= $diffinfo{'from_id'};
5083                 $hash        ||= $diffinfo{'to_id'};
5084
5085                 # non-textual hash id's can be cached
5086                 if ($hash_base =~ m/^[0-9a-fA-F]{40}$/ &&
5087                     $hash_parent_base =~ m/^[0-9a-fA-F]{40}$/) {
5088                         $expires = '+1d';
5089                 }
5090
5091                 # open patch output
5092                 open $fd, "-|", git_cmd(), "diff-tree", '-r', @diff_opts,
5093                         '-p', ($format eq 'html' ? "--full-index" : ()),
5094                         $hash_parent_base, $hash_base,
5095                         "--", (defined $file_parent ? $file_parent : ()), $file_name
5096                         or die_error(500, "Open git-diff-tree failed");
5097         }
5098
5099         # old/legacy style URI
5100         if (!%diffinfo && # if new style URI failed
5101             defined $hash && defined $hash_parent) {
5102                 # fake git-diff-tree raw output
5103                 $diffinfo{'from_mode'} = $diffinfo{'to_mode'} = "blob";
5104                 $diffinfo{'from_id'} = $hash_parent;
5105                 $diffinfo{'to_id'}   = $hash;
5106                 if (defined $file_name) {
5107                         if (defined $file_parent) {
5108                                 $diffinfo{'status'} = '2';
5109                                 $diffinfo{'from_file'} = $file_parent;
5110                                 $diffinfo{'to_file'}   = $file_name;
5111                         } else { # assume not renamed
5112                                 $diffinfo{'status'} = '1';
5113                                 $diffinfo{'from_file'} = $file_name;
5114                                 $diffinfo{'to_file'}   = $file_name;
5115                         }
5116                 } else { # no filename given
5117                         $diffinfo{'status'} = '2';
5118                         $diffinfo{'from_file'} = $hash_parent;
5119                         $diffinfo{'to_file'}   = $hash;
5120                 }
5121
5122                 # non-textual hash id's can be cached
5123                 if ($hash =~ m/^[0-9a-fA-F]{40}$/ &&
5124                     $hash_parent =~ m/^[0-9a-fA-F]{40}$/) {
5125                         $expires = '+1d';
5126                 }
5127
5128                 # open patch output
5129                 open $fd, "-|", git_cmd(), "diff", @diff_opts,
5130                         '-p', ($format eq 'html' ? "--full-index" : ()),
5131                         $hash_parent, $hash, "--"
5132                         or die_error(500, "Open git-diff failed");
5133         } else  {
5134                 die_error(400, "Missing one of the blob diff parameters")
5135                         unless %diffinfo;
5136         }
5137
5138         # header
5139         if ($format eq 'html') {
5140                 my $formats_nav =
5141                         $cgi->a({-href => href(action=>"blobdiff_plain", -replay=>1)},
5142                                 "raw");
5143                 git_header_html(undef, $expires);
5144                 if (defined $hash_base && (my %co = parse_commit($hash_base))) {
5145                         git_print_page_nav('','', $hash_base,$co{'tree'},$hash_base, $formats_nav);
5146                         git_print_header_div('commit', esc_html($co{'title'}), $hash_base);
5147                 } else {
5148                         print "<div class=\"page_nav\"><br/>$formats_nav<br/></div>\n";
5149                         print "<div class=\"title\">$hash vs $hash_parent</div>\n";
5150                 }
5151                 if (defined $file_name) {
5152                         git_print_page_path($file_name, "blob", $hash_base);
5153                 } else {
5154                         print "<div class=\"page_path\"></div>\n";
5155                 }
5156
5157         } elsif ($format eq 'plain') {
5158                 print $cgi->header(
5159                         -type => 'text/plain',
5160                         -charset => 'utf-8',
5161                         -expires => $expires,
5162                         -content_disposition => 'inline; filename="' . "$file_name" . '.patch"');
5163
5164                 print "X-Git-Url: " . $cgi->self_url() . "\n\n";
5165
5166         } else {
5167                 die_error(400, "Unknown blobdiff format");
5168         }
5169
5170         # patch
5171         if ($format eq 'html') {
5172                 print "<div class=\"page_body\">\n";
5173
5174                 git_patchset_body($fd, [ \%diffinfo ], $hash_base, $hash_parent_base);
5175                 close $fd;
5176
5177                 print "</div>\n"; # class="page_body"
5178                 git_footer_html();
5179
5180         } else {
5181                 while (my $line = <$fd>) {
5182                         $line =~ s!a/($hash|$hash_parent)!'a/'.esc_path($diffinfo{'from_file'})!eg;
5183                         $line =~ s!b/($hash|$hash_parent)!'b/'.esc_path($diffinfo{'to_file'})!eg;
5184
5185                         print $line;
5186
5187                         last if $line =~ m!^\+\+\+!;
5188                 }
5189                 local $/ = undef;
5190                 print <$fd>;
5191                 close $fd;
5192         }
5193 }
5194
5195 sub git_blobdiff_plain {
5196         git_blobdiff('plain');
5197 }
5198
5199 sub git_commitdiff {
5200         my $format = shift || 'html';
5201         $hash ||= $hash_base || "HEAD";
5202         my %co = parse_commit($hash)
5203             or die_error(404, "Unknown commit object");
5204
5205         # choose format for commitdiff for merge
5206         if (! defined $hash_parent && @{$co{'parents'}} > 1) {
5207                 $hash_parent = '--cc';
5208         }
5209         # we need to prepare $formats_nav before almost any parameter munging
5210         my $formats_nav;
5211         if ($format eq 'html') {
5212                 $formats_nav =
5213                         $cgi->a({-href => href(action=>"commitdiff_plain", -replay=>1)},
5214                                 "raw");
5215
5216                 if (defined $hash_parent &&
5217                     $hash_parent ne '-c' && $hash_parent ne '--cc') {
5218                         # commitdiff with two commits given
5219                         my $hash_parent_short = $hash_parent;
5220                         if ($hash_parent =~ m/^[0-9a-fA-F]{40}$/) {
5221                                 $hash_parent_short = substr($hash_parent, 0, 7);
5222                         }
5223                         $formats_nav .=
5224                                 ' (from';
5225                         for (my $i = 0; $i < @{$co{'parents'}}; $i++) {
5226                                 if ($co{'parents'}[$i] eq $hash_parent) {
5227                                         $formats_nav .= ' parent ' . ($i+1);
5228                                         last;
5229                                 }
5230                         }
5231                         $formats_nav .= ': ' .
5232                                 $cgi->a({-href => href(action=>"commitdiff",
5233                                                        hash=>$hash_parent)},
5234                                         esc_html($hash_parent_short)) .
5235                                 ')';
5236                 } elsif (!$co{'parent'}) {
5237                         # --root commitdiff
5238                         $formats_nav .= ' (initial)';
5239                 } elsif (scalar @{$co{'parents'}} == 1) {
5240                         # single parent commit
5241                         $formats_nav .=
5242                                 ' (parent: ' .
5243                                 $cgi->a({-href => href(action=>"commitdiff",
5244                                                        hash=>$co{'parent'})},
5245                                         esc_html(substr($co{'parent'}, 0, 7))) .
5246                                 ')';
5247                 } else {
5248                         # merge commit
5249                         if ($hash_parent eq '--cc') {
5250                                 $formats_nav .= ' | ' .
5251                                         $cgi->a({-href => href(action=>"commitdiff",
5252                                                                hash=>$hash, hash_parent=>'-c')},
5253                                                 'combined');
5254                         } else { # $hash_parent eq '-c'
5255                                 $formats_nav .= ' | ' .
5256                                         $cgi->a({-href => href(action=>"commitdiff",
5257                                                                hash=>$hash, hash_parent=>'--cc')},
5258                                                 'compact');
5259                         }
5260                         $formats_nav .=
5261                                 ' (merge: ' .
5262                                 join(' ', map {
5263                                         $cgi->a({-href => href(action=>"commitdiff",
5264                                                                hash=>$_)},
5265                                                 esc_html(substr($_, 0, 7)));
5266                                 } @{$co{'parents'}} ) .
5267                                 ')';
5268                 }
5269         }
5270
5271         my $hash_parent_param = $hash_parent;
5272         if (!defined $hash_parent_param) {
5273                 # --cc for multiple parents, --root for parentless
5274                 $hash_parent_param =
5275                         @{$co{'parents'}} > 1 ? '--cc' : $co{'parent'} || '--root';
5276         }
5277
5278         # read commitdiff
5279         my $fd;
5280         my @difftree;
5281         if ($format eq 'html') {
5282                 open $fd, "-|", git_cmd(), "diff-tree", '-r', @diff_opts,
5283                         "--no-commit-id", "--patch-with-raw", "--full-index",
5284                         $hash_parent_param, $hash, "--"
5285                         or die_error(500, "Open git-diff-tree failed");
5286
5287                 while (my $line = <$fd>) {
5288                         chomp $line;
5289                         # empty line ends raw part of diff-tree output
5290                         last unless $line;
5291                         push @difftree, scalar parse_difftree_raw_line($line);
5292                 }
5293
5294         } elsif ($format eq 'plain') {
5295                 open $fd, "-|", git_cmd(), "diff-tree", '-r', @diff_opts,
5296                         '-p', $hash_parent_param, $hash, "--"
5297                         or die_error(500, "Open git-diff-tree failed");
5298
5299         } else {
5300                 die_error(400, "Unknown commitdiff format");
5301         }
5302
5303         # non-textual hash id's can be cached
5304         my $expires;
5305         if ($hash =~ m/^[0-9a-fA-F]{40}$/) {
5306                 $expires = "+1d";
5307         }
5308
5309         # write commit message
5310         if ($format eq 'html') {
5311                 my $refs = git_get_references();
5312                 my $ref = format_ref_marker($refs, $co{'id'});
5313
5314                 git_header_html(undef, $expires);
5315                 git_print_page_nav('commitdiff','', $hash,$co{'tree'},$hash, $formats_nav);
5316                 git_print_header_div('commit', esc_html($co{'title'}) . $ref, $hash);
5317                 git_print_authorship(\%co);
5318                 print "<div class=\"page_body\">\n";
5319                 if (@{$co{'comment'}} > 1) {
5320                         print "<div class=\"log\">\n";
5321                         git_print_log($co{'comment'}, -final_empty_line=> 1, -remove_title => 1);
5322                         print "</div>\n"; # class="log"
5323                 }
5324
5325         } elsif ($format eq 'plain') {
5326                 my $refs = git_get_references("tags");
5327                 my $tagname = git_get_rev_name_tags($hash);
5328                 my $filename = basename($project) . "-$hash.patch";
5329
5330                 print $cgi->header(
5331                         -type => 'text/plain',
5332                         -charset => 'utf-8',
5333                         -expires => $expires,
5334                         -content_disposition => 'inline; filename="' . "$filename" . '"');
5335                 my %ad = parse_date($co{'author_epoch'}, $co{'author_tz'});
5336                 print "From: " . to_utf8($co{'author'}) . "\n";
5337                 print "Date: $ad{'rfc2822'} ($ad{'tz_local'})\n";
5338                 print "Subject: " . to_utf8($co{'title'}) . "\n";
5339
5340                 print "X-Git-Tag: $tagname\n" if $tagname;
5341                 print "X-Git-Url: " . $cgi->self_url() . "\n\n";
5342
5343                 foreach my $line (@{$co{'comment'}}) {
5344                         print to_utf8($line) . "\n";
5345                 }
5346                 print "---\n\n";
5347         }
5348
5349         # write patch
5350         if ($format eq 'html') {
5351                 my $use_parents = !defined $hash_parent ||
5352                         $hash_parent eq '-c' || $hash_parent eq '--cc';
5353                 git_difftree_body(\@difftree, $hash,
5354                                   $use_parents ? @{$co{'parents'}} : $hash_parent);
5355                 print "<br/>\n";
5356
5357                 git_patchset_body($fd, \@difftree, $hash,
5358                                   $use_parents ? @{$co{'parents'}} : $hash_parent);
5359                 close $fd;
5360                 print "</div>\n"; # class="page_body"
5361                 git_footer_html();
5362
5363         } elsif ($format eq 'plain') {
5364                 local $/ = undef;
5365                 print <$fd>;
5366                 close $fd
5367                         or print "Reading git-diff-tree failed\n";
5368         }
5369 }
5370
5371 sub git_commitdiff_plain {
5372         git_commitdiff('plain');
5373 }
5374
5375 sub git_history {
5376         if (!defined $hash_base) {
5377                 $hash_base = git_get_head_hash($project);
5378         }
5379         if (!defined $page) {
5380                 $page = 0;
5381         }
5382         my $ftype;
5383         my %co = parse_commit($hash_base)
5384             or die_error(404, "Unknown commit object");
5385
5386         my $refs = git_get_references();
5387         my $limit = sprintf("--max-count=%i", (100 * ($page+1)));
5388
5389         my @commitlist = parse_commits($hash_base, 101, (100 * $page),
5390                                        $file_name, "--full-history")
5391             or die_error(404, "No such file or directory on given branch");
5392
5393         if (!defined $hash && defined $file_name) {
5394                 # some commits could have deleted file in question,
5395                 # and not have it in tree, but one of them has to have it
5396                 for (my $i = 0; $i <= @commitlist; $i++) {
5397                         $hash = git_get_hash_by_path($commitlist[$i]{'id'}, $file_name);
5398                         last if defined $hash;
5399                 }
5400         }
5401         if (defined $hash) {
5402                 $ftype = git_get_type($hash);
5403         }
5404         if (!defined $ftype) {
5405                 die_error(500, "Unknown type of object");
5406         }
5407
5408         my $paging_nav = '';
5409         if ($page > 0) {
5410                 $paging_nav .=
5411                         $cgi->a({-href => href(action=>"history", hash=>$hash, hash_base=>$hash_base,
5412                                                file_name=>$file_name)},
5413                                 "first");
5414                 $paging_nav .= " &sdot; " .
5415                         $cgi->a({-href => href(-replay=>1, page=>$page-1),
5416                                  -accesskey => "p", -title => "Alt-p"}, "prev");
5417         } else {
5418                 $paging_nav .= "first";
5419                 $paging_nav .= " &sdot; prev";
5420         }
5421         my $next_link = '';
5422         if ($#commitlist >= 100) {
5423                 $next_link =
5424                         $cgi->a({-href => href(-replay=>1, page=>$page+1),
5425                                  -accesskey => "n", -title => "Alt-n"}, "next");
5426                 $paging_nav .= " &sdot; $next_link";
5427         } else {
5428                 $paging_nav .= " &sdot; next";
5429         }
5430
5431         git_header_html();
5432         git_print_page_nav('history','', $hash_base,$co{'tree'},$hash_base, $paging_nav);
5433         git_print_header_div('commit', esc_html($co{'title'}), $hash_base);
5434         git_print_page_path($file_name, $ftype, $hash_base);
5435
5436         git_history_body(\@commitlist, 0, 99,
5437                          $refs, $hash_base, $ftype, $next_link);
5438
5439         git_footer_html();
5440 }
5441
5442 sub git_search {
5443         gitweb_check_feature('search') or die_error(403, "Search is disabled");
5444         if (!defined $searchtext) {
5445                 die_error(400, "Text field is empty");
5446         }
5447         if (!defined $hash) {
5448                 $hash = git_get_head_hash($project);
5449         }
5450         my %co = parse_commit($hash);
5451         if (!%co) {
5452                 die_error(404, "Unknown commit object");
5453         }
5454         if (!defined $page) {
5455                 $page = 0;
5456         }
5457
5458         $searchtype ||= 'commit';
5459         if ($searchtype eq 'pickaxe') {
5460                 # pickaxe may take all resources of your box and run for several minutes
5461                 # with every query - so decide by yourself how public you make this feature
5462                 gitweb_check_feature('pickaxe')
5463                     or die_error(403, "Pickaxe is disabled");
5464         }
5465         if ($searchtype eq 'grep') {
5466                 gitweb_check_feature('grep')
5467                     or die_error(403, "Grep is disabled");
5468         }
5469
5470         git_header_html();
5471
5472         if ($searchtype eq 'commit' or $searchtype eq 'author' or $searchtype eq 'committer') {
5473                 my $greptype;
5474                 if ($searchtype eq 'commit') {
5475                         $greptype = "--grep=";
5476                 } elsif ($searchtype eq 'author') {
5477                         $greptype = "--author=";
5478                 } elsif ($searchtype eq 'committer') {
5479                         $greptype = "--committer=";
5480                 }
5481                 $greptype .= $searchtext;
5482                 my @commitlist = parse_commits($hash, 101, (100 * $page), undef,
5483                                                $greptype, '--regexp-ignore-case',
5484                                                $search_use_regexp ? '--extended-regexp' : '--fixed-strings');
5485
5486                 my $paging_nav = '';
5487                 if ($page > 0) {
5488                         $paging_nav .=
5489                                 $cgi->a({-href => href(action=>"search", hash=>$hash,
5490                                                        searchtext=>$searchtext,
5491                                                        searchtype=>$searchtype)},
5492                                         "first");
5493                         $paging_nav .= " &sdot; " .
5494                                 $cgi->a({-href => href(-replay=>1, page=>$page-1),
5495                                          -accesskey => "p", -title => "Alt-p"}, "prev");
5496                 } else {
5497                         $paging_nav .= "first";
5498                         $paging_nav .= " &sdot; prev";
5499                 }
5500                 my $next_link = '';
5501                 if ($#commitlist >= 100) {
5502                         $next_link =
5503                                 $cgi->a({-href => href(-replay=>1, page=>$page+1),
5504                                          -accesskey => "n", -title => "Alt-n"}, "next");
5505                         $paging_nav .= " &sdot; $next_link";
5506                 } else {
5507                         $paging_nav .= " &sdot; next";
5508                 }
5509
5510                 if ($#commitlist >= 100) {
5511                 }
5512
5513                 git_print_page_nav('','', $hash,$co{'tree'},$hash, $paging_nav);
5514                 git_print_header_div('commit', esc_html($co{'title'}), $hash);
5515                 git_search_grep_body(\@commitlist, 0, 99, $next_link);
5516         }
5517
5518         if ($searchtype eq 'pickaxe') {
5519                 git_print_page_nav('','', $hash,$co{'tree'},$hash);
5520                 git_print_header_div('commit', esc_html($co{'title'}), $hash);
5521
5522                 print "<table class=\"pickaxe search\">\n";
5523                 my $alternate = 1;
5524                 $/ = "\n";
5525                 open my $fd, '-|', git_cmd(), '--no-pager', 'log', @diff_opts,
5526                         '--pretty=format:%H', '--no-abbrev', '--raw', "-S$searchtext",
5527                         ($search_use_regexp ? '--pickaxe-regex' : ());
5528                 undef %co;
5529                 my @files;
5530                 while (my $line = <$fd>) {
5531                         chomp $line;
5532                         next unless $line;
5533
5534                         my %set = parse_difftree_raw_line($line);
5535                         if (defined $set{'commit'}) {
5536                                 # finish previous commit
5537                                 if (%co) {
5538                                         print "</td>\n" .
5539                                               "<td class=\"link\">" .
5540                                               $cgi->a({-href => href(action=>"commit", hash=>$co{'id'})}, "commit") .
5541                                               " | " .
5542                                               $cgi->a({-href => href(action=>"tree", hash=>$co{'tree'}, hash_base=>$co{'id'})}, "tree");
5543                                         print "</td>\n" .
5544                                               "</tr>\n";
5545                                 }
5546
5547                                 if ($alternate) {
5548                                         print "<tr class=\"dark\">\n";
5549                                 } else {
5550                                         print "<tr class=\"light\">\n";
5551                                 }
5552                                 $alternate ^= 1;
5553                                 %co = parse_commit($set{'commit'});
5554                                 my $author = chop_and_escape_str($co{'author_name'}, 15, 5);
5555                                 print "<td title=\"$co{'age_string_age'}\"><i>$co{'age_string_date'}</i></td>\n" .
5556                                       "<td><i>$author</i></td>\n" .
5557                                       "<td>" .
5558                                       $cgi->a({-href => href(action=>"commit", hash=>$co{'id'}),
5559                                               -class => "list subject"},
5560                                               chop_and_escape_str($co{'title'}, 50) . "<br/>");
5561                         } elsif (defined $set{'to_id'}) {
5562                                 next if ($set{'to_id'} =~ m/^0{40}$/);
5563
5564                                 print $cgi->a({-href => href(action=>"blob", hash_base=>$co{'id'},
5565                                                              hash=>$set{'to_id'}, file_name=>$set{'to_file'}),
5566                                               -class => "list"},
5567                                               "<span class=\"match\">" . esc_path($set{'file'}) . "</span>") .
5568                                       "<br/>\n";
5569                         }
5570                 }
5571                 close $fd;
5572
5573                 # finish last commit (warning: repetition!)
5574                 if (%co) {
5575                         print "</td>\n" .
5576                               "<td class=\"link\">" .
5577                               $cgi->a({-href => href(action=>"commit", hash=>$co{'id'})}, "commit") .
5578                               " | " .
5579                               $cgi->a({-href => href(action=>"tree", hash=>$co{'tree'}, hash_base=>$co{'id'})}, "tree");
5580                         print "</td>\n" .
5581                               "</tr>\n";
5582                 }
5583
5584                 print "</table>\n";
5585         }
5586
5587         if ($searchtype eq 'grep') {
5588                 git_print_page_nav('','', $hash,$co{'tree'},$hash);
5589                 git_print_header_div('commit', esc_html($co{'title'}), $hash);
5590
5591                 print "<table class=\"grep_search\">\n";
5592                 my $alternate = 1;
5593                 my $matches = 0;
5594                 $/ = "\n";
5595                 open my $fd, "-|", git_cmd(), 'grep', '-n',
5596                         $search_use_regexp ? ('-E', '-i') : '-F',
5597                         $searchtext, $co{'tree'};
5598                 my $lastfile = '';
5599                 while (my $line = <$fd>) {
5600                         chomp $line;
5601                         my ($file, $lno, $ltext, $binary);
5602                         last if ($matches++ > 1000);
5603                         if ($line =~ /^Binary file (.+) matches$/) {
5604                                 $file = $1;
5605                                 $binary = 1;
5606                         } else {
5607                                 (undef, $file, $lno, $ltext) = split(/:/, $line, 4);
5608                         }
5609                         if ($file ne $lastfile) {
5610                                 $lastfile and print "</td></tr>\n";
5611                                 if ($alternate++) {
5612                                         print "<tr class=\"dark\">\n";
5613                                 } else {
5614                                         print "<tr class=\"light\">\n";
5615                                 }
5616                                 print "<td class=\"list\">".
5617                                         $cgi->a({-href => href(action=>"blob", hash=>$co{'hash'},
5618                                                                file_name=>"$file"),
5619                                                 -class => "list"}, esc_path($file));
5620                                 print "</td><td>\n";
5621                                 $lastfile = $file;
5622                         }
5623                         if ($binary) {
5624                                 print "<div class=\"binary\">Binary file</div>\n";
5625                         } else {
5626                                 $ltext = untabify($ltext);
5627                                 if ($ltext =~ m/^(.*)($search_regexp)(.*)$/i) {
5628                                         $ltext = esc_html($1, -nbsp=>1);
5629                                         $ltext .= '<span class="match">';
5630                                         $ltext .= esc_html($2, -nbsp=>1);
5631                                         $ltext .= '</span>';
5632                                         $ltext .= esc_html($3, -nbsp=>1);
5633                                 } else {
5634                                         $ltext = esc_html($ltext, -nbsp=>1);
5635                                 }
5636                                 print "<div class=\"pre\">" .
5637                                         $cgi->a({-href => href(action=>"blob", hash=>$co{'hash'},
5638                                                                file_name=>"$file").'#l'.$lno,
5639                                                 -class => "linenr"}, sprintf('%4i', $lno))
5640                                         . ' ' .  $ltext . "</div>\n";
5641                         }
5642                 }
5643                 if ($lastfile) {
5644                         print "</td></tr>\n";
5645                         if ($matches > 1000) {
5646                                 print "<div class=\"diff nodifferences\">Too many matches, listing trimmed</div>\n";
5647                         }
5648                 } else {
5649                         print "<div class=\"diff nodifferences\">No matches found</div>\n";
5650                 }
5651                 close $fd;
5652
5653                 print "</table>\n";
5654         }
5655         git_footer_html();
5656 }
5657
5658 sub git_search_help {
5659         git_header_html();
5660         git_print_page_nav('','', $hash,$hash,$hash);
5661         print <<EOT;
5662 <p><strong>Pattern</strong> is by default a normal string that is matched precisely (but without
5663 regard to case, except in the case of pickaxe). However, when you check the <em>re</em> checkbox,
5664 the pattern entered is recognized as the POSIX extended
5665 <a href="http://en.wikipedia.org/wiki/Regular_expression">regular expression</a> (also case
5666 insensitive).</p>
5667 <dl>
5668 <dt><b>commit</b></dt>
5669 <dd>The commit messages and authorship information will be scanned for the given pattern.</dd>
5670 EOT
5671         my ($have_grep) = gitweb_check_feature('grep');
5672         if ($have_grep) {
5673                 print <<EOT;
5674 <dt><b>grep</b></dt>
5675 <dd>All files in the currently selected tree (HEAD unless you are explicitly browsing
5676     a different one) are searched for the given pattern. On large trees, this search can take
5677 a while and put some strain on the server, so please use it with some consideration. Note that
5678 due to git-grep peculiarity, currently if regexp mode is turned off, the matches are
5679 case-sensitive.</dd>
5680 EOT
5681         }
5682         print <<EOT;
5683 <dt><b>author</b></dt>
5684 <dd>Name and e-mail of the change author and date of birth of the patch will be scanned for the given pattern.</dd>
5685 <dt><b>committer</b></dt>
5686 <dd>Name and e-mail of the committer and date of commit will be scanned for the given pattern.</dd>
5687 EOT
5688         my ($have_pickaxe) = gitweb_check_feature('pickaxe');
5689         if ($have_pickaxe) {
5690                 print <<EOT;
5691 <dt><b>pickaxe</b></dt>
5692 <dd>All commits that caused the string to appear or disappear from any file (changes that
5693 added, removed or "modified" the string) will be listed. This search can take a while and
5694 takes a lot of strain on the server, so please use it wisely. Note that since you may be
5695 interested even in changes just changing the case as well, this search is case sensitive.</dd>
5696 EOT
5697         }
5698         print "</dl>\n";
5699         git_footer_html();
5700 }
5701
5702 sub git_shortlog {
5703         my $head = git_get_head_hash($project);
5704         if (!defined $hash) {
5705                 $hash = $head;
5706         }
5707         if (!defined $page) {
5708                 $page = 0;
5709         }
5710         my $refs = git_get_references();
5711
5712         my $commit_hash = $hash;
5713         if (defined $hash_parent) {
5714                 $commit_hash = "$hash_parent..$hash";
5715         }
5716         my @commitlist = parse_commits($commit_hash, 101, (100 * $page));
5717
5718         my $paging_nav = format_paging_nav('shortlog', $hash, $head, $page, $#commitlist >= 100);
5719         my $next_link = '';
5720         if ($#commitlist >= 100) {
5721                 $next_link =
5722                         $cgi->a({-href => href(-replay=>1, page=>$page+1),
5723                                  -accesskey => "n", -title => "Alt-n"}, "next");
5724         }
5725
5726         git_header_html();
5727         git_print_page_nav('shortlog','', $hash,$hash,$hash, $paging_nav);
5728         git_print_header_div('summary', $project);
5729
5730         git_shortlog_body(\@commitlist, 0, 99, $refs, $next_link);
5731
5732         git_footer_html();
5733 }
5734
5735 ## ......................................................................
5736 ## feeds (RSS, Atom; OPML)
5737
5738 sub git_feed {
5739         my $format = shift || 'atom';
5740         my ($have_blame) = gitweb_check_feature('blame');
5741
5742         # Atom: http://www.atomenabled.org/developers/syndication/
5743         # RSS:  http://www.notestips.com/80256B3A007F2692/1/NAMO5P9UPQ
5744         if ($format ne 'rss' && $format ne 'atom') {
5745                 die_error(400, "Unknown web feed format");
5746         }
5747
5748         # log/feed of current (HEAD) branch, log of given branch, history of file/directory
5749         my $head = $hash || 'HEAD';
5750         my @commitlist = parse_commits($head, 150, 0, $file_name);
5751
5752         my %latest_commit;
5753         my %latest_date;
5754         my $content_type = "application/$format+xml";
5755         if (defined $cgi->http('HTTP_ACCEPT') &&
5756                  $cgi->Accept('text/xml') > $cgi->Accept($content_type)) {
5757                 # browser (feed reader) prefers text/xml
5758                 $content_type = 'text/xml';
5759         }
5760         if (defined($commitlist[0])) {
5761                 %latest_commit = %{$commitlist[0]};
5762                 %latest_date   = parse_date($latest_commit{'author_epoch'});
5763                 print $cgi->header(
5764                         -type => $content_type,
5765                         -charset => 'utf-8',
5766                         -last_modified => $latest_date{'rfc2822'});
5767         } else {
5768                 print $cgi->header(
5769                         -type => $content_type,
5770                         -charset => 'utf-8');
5771         }
5772
5773         # Optimization: skip generating the body if client asks only
5774         # for Last-Modified date.
5775         return if ($cgi->request_method() eq 'HEAD');
5776
5777         # header variables
5778         my $title = "$site_name - $project/$action";
5779         my $feed_type = 'log';
5780         if (defined $hash) {
5781                 $title .= " - '$hash'";
5782                 $feed_type = 'branch log';
5783                 if (defined $file_name) {
5784                         $title .= " :: $file_name";
5785                         $feed_type = 'history';
5786                 }
5787         } elsif (defined $file_name) {
5788                 $title .= " - $file_name";
5789                 $feed_type = 'history';
5790         }
5791         $title .= " $feed_type";
5792         my $descr = git_get_project_description($project);
5793         if (defined $descr) {
5794                 $descr = esc_html($descr);
5795         } else {
5796                 $descr = "$project " .
5797                          ($format eq 'rss' ? 'RSS' : 'Atom') .
5798                          " feed";
5799         }
5800         my $owner = git_get_project_owner($project);
5801         $owner = esc_html($owner);
5802
5803         #header
5804         my $alt_url;
5805         if (defined $file_name) {
5806                 $alt_url = href(-full=>1, action=>"history", hash=>$hash, file_name=>$file_name);
5807         } elsif (defined $hash) {
5808                 $alt_url = href(-full=>1, action=>"log", hash=>$hash);
5809         } else {
5810                 $alt_url = href(-full=>1, action=>"summary");
5811         }
5812         print qq!<?xml version="1.0" encoding="utf-8"?>\n!;
5813         if ($format eq 'rss') {
5814                 print <<XML;
5815 <rss version="2.0" xmlns:content="http://purl.org/rss/1.0/modules/content/">
5816 <channel>
5817 XML
5818                 print "<title>$title</title>\n" .
5819                       "<link>$alt_url</link>\n" .
5820                       "<description>$descr</description>\n" .
5821                       "<language>en</language>\n";
5822         } elsif ($format eq 'atom') {
5823                 print <<XML;
5824 <feed xmlns="http://www.w3.org/2005/Atom">
5825 XML
5826                 print "<title>$title</title>\n" .
5827                       "<subtitle>$descr</subtitle>\n" .
5828                       '<link rel="alternate" type="text/html" href="' .
5829                       $alt_url . '" />' . "\n" .
5830                       '<link rel="self" type="' . $content_type . '" href="' .
5831                       $cgi->self_url() . '" />' . "\n" .
5832                       "<id>" . href(-full=>1) . "</id>\n" .
5833                       # use project owner for feed author
5834                       "<author><name>$owner</name></author>\n";
5835                 if (defined $favicon) {
5836                         print "<icon>" . esc_url($favicon) . "</icon>\n";
5837                 }
5838                 if (defined $logo_url) {
5839                         # not twice as wide as tall: 72 x 27 pixels
5840                         print "<logo>" . esc_url($logo) . "</logo>\n";
5841                 }
5842                 if (! %latest_date) {
5843                         # dummy date to keep the feed valid until commits trickle in:
5844                         print "<updated>1970-01-01T00:00:00Z</updated>\n";
5845                 } else {
5846                         print "<updated>$latest_date{'iso-8601'}</updated>\n";
5847                 }
5848         }
5849
5850         # contents
5851         for (my $i = 0; $i <= $#commitlist; $i++) {
5852                 my %co = %{$commitlist[$i]};
5853                 my $commit = $co{'id'};
5854                 # we read 150, we always show 30 and the ones more recent than 48 hours
5855                 if (($i >= 20) && ((time - $co{'author_epoch'}) > 48*60*60)) {
5856                         last;
5857                 }
5858                 my %cd = parse_date($co{'author_epoch'});
5859
5860                 # get list of changed files
5861                 open my $fd, "-|", git_cmd(), "diff-tree", '-r', @diff_opts,
5862                         $co{'parent'} || "--root",
5863                         $co{'id'}, "--", (defined $file_name ? $file_name : ())
5864                         or next;
5865                 my @difftree = map { chomp; $_ } <$fd>;
5866                 close $fd
5867                         or next;
5868
5869                 # print element (entry, item)
5870                 my $co_url = href(-full=>1, action=>"commitdiff", hash=>$commit);
5871                 if ($format eq 'rss') {
5872                         print "<item>\n" .
5873                               "<title>" . esc_html($co{'title'}) . "</title>\n" .
5874                               "<author>" . esc_html($co{'author'}) . "</author>\n" .
5875                               "<pubDate>$cd{'rfc2822'}</pubDate>\n" .
5876                               "<guid isPermaLink=\"true\">$co_url</guid>\n" .
5877                               "<link>$co_url</link>\n" .
5878                               "<description>" . esc_html($co{'title'}) . "</description>\n" .
5879                               "<content:encoded>" .
5880                               "<![CDATA[\n";
5881                 } elsif ($format eq 'atom') {
5882                         print "<entry>\n" .
5883                               "<title type=\"html\">" . esc_html($co{'title'}) . "</title>\n" .
5884                               "<updated>$cd{'iso-8601'}</updated>\n" .
5885                               "<author>\n" .
5886                               "  <name>" . esc_html($co{'author_name'}) . "</name>\n";
5887                         if ($co{'author_email'}) {
5888                                 print "  <email>" . esc_html($co{'author_email'}) . "</email>\n";
5889                         }
5890                         print "</author>\n" .
5891                               # use committer for contributor
5892                               "<contributor>\n" .
5893                               "  <name>" . esc_html($co{'committer_name'}) . "</name>\n";
5894                         if ($co{'committer_email'}) {
5895                                 print "  <email>" . esc_html($co{'committer_email'}) . "</email>\n";
5896                         }
5897                         print "</contributor>\n" .
5898                               "<published>$cd{'iso-8601'}</published>\n" .
5899                               "<link rel=\"alternate\" type=\"text/html\" href=\"$co_url\" />\n" .
5900                               "<id>$co_url</id>\n" .
5901                               "<content type=\"xhtml\" xml:base=\"" . esc_url($my_url) . "\">\n" .
5902                               "<div xmlns=\"http://www.w3.org/1999/xhtml\">\n";
5903                 }
5904                 my $comment = $co{'comment'};
5905                 print "<pre>\n";
5906                 foreach my $line (@$comment) {
5907                         $line = esc_html($line);
5908                         print "$line\n";
5909                 }
5910                 print "</pre><ul>\n";
5911                 foreach my $difftree_line (@difftree) {
5912                         my %difftree = parse_difftree_raw_line($difftree_line);
5913                         next if !$difftree{'from_id'};
5914
5915                         my $file = $difftree{'file'} || $difftree{'to_file'};
5916
5917                         print "<li>" .
5918                               "[" .
5919                               $cgi->a({-href => href(-full=>1, action=>"blobdiff",
5920                                                      hash=>$difftree{'to_id'}, hash_parent=>$difftree{'from_id'},
5921                                                      hash_base=>$co{'id'}, hash_parent_base=>$co{'parent'},
5922                                                      file_name=>$file, file_parent=>$difftree{'from_file'}),
5923                                       -title => "diff"}, 'D');
5924                         if ($have_blame) {
5925                                 print $cgi->a({-href => href(-full=>1, action=>"blame",
5926                                                              file_name=>$file, hash_base=>$commit),
5927                                               -title => "blame"}, 'B');
5928                         }
5929                         # if this is not a feed of a file history
5930                         if (!defined $file_name || $file_name ne $file) {
5931                                 print $cgi->a({-href => href(-full=>1, action=>"history",
5932                                                              file_name=>$file, hash=>$commit),
5933                                               -title => "history"}, 'H');
5934                         }
5935                         $file = esc_path($file);
5936                         print "] ".
5937                               "$file</li>\n";
5938                 }
5939                 if ($format eq 'rss') {
5940                         print "</ul>]]>\n" .
5941                               "</content:encoded>\n" .
5942                               "</item>\n";
5943                 } elsif ($format eq 'atom') {
5944                         print "</ul>\n</div>\n" .
5945                               "</content>\n" .
5946                               "</entry>\n";
5947                 }
5948         }
5949
5950         # end of feed
5951         if ($format eq 'rss') {
5952                 print "</channel>\n</rss>\n";
5953         }       elsif ($format eq 'atom') {
5954                 print "</feed>\n";
5955         }
5956 }
5957
5958 sub git_rss {
5959         git_feed('rss');
5960 }
5961
5962 sub git_atom {
5963         git_feed('atom');
5964 }
5965
5966 sub git_opml {
5967         my @list = git_get_projects_list();
5968
5969         print $cgi->header(-type => 'text/xml', -charset => 'utf-8');
5970         print <<XML;
5971 <?xml version="1.0" encoding="utf-8"?>
5972 <opml version="1.0">
5973 <head>
5974   <title>$site_name OPML Export</title>
5975 </head>
5976 <body>
5977 <outline text="git RSS feeds">
5978 XML
5979
5980         foreach my $pr (@list) {
5981                 my %proj = %$pr;
5982                 my $head = git_get_head_hash($proj{'path'});
5983                 if (!defined $head) {
5984                         next;
5985                 }
5986                 $git_dir = "$projectroot/$proj{'path'}";
5987                 my %co = parse_commit($head);
5988                 if (!%co) {
5989                         next;
5990                 }
5991
5992                 my $path = esc_html(chop_str($proj{'path'}, 25, 5));
5993                 my $rss  = "$my_url?p=$proj{'path'};a=rss";
5994                 my $html = "$my_url?p=$proj{'path'};a=summary";
5995                 print "<outline type=\"rss\" text=\"$path\" title=\"$path\" xmlUrl=\"$rss\" htmlUrl=\"$html\"/>\n";
5996         }
5997         print <<XML;
5998 </outline>
5999 </body>
6000 </opml>
6001 XML
6002 }