git.oblomov.eu Git - git/blob - gitweb/gitweb.perl

   1 #!/usr/bin/perl
   2
   3 # gitweb - simple web interface to track changes in git repositories
   4 #
   5 # (C) 2005-2006, Kay Sievers <kay.sievers@vrfy.org>
   6 # (C) 2005, Christian Gierke
   7 #
   8 # This program is licensed under the GPLv2
   9
  10 use 5.008;
  11 use strict;
  12 use warnings;
  13 use CGI qw(:standard :escapeHTML -nosticky);
  14 use CGI::Util qw(unescape);
  15 use CGI::Carp qw(fatalsToBrowser set_message);
  16 use Encode;
  17 use Fcntl ':mode';
  18 use File::Find qw();
  19 use File::Basename qw(basename);
  20 use Time::HiRes qw(gettimeofday tv_interval);
  21 binmode STDOUT, ':utf8';
  22
  23 our $t0 = [ gettimeofday() ];
  24 our $number_of_git_cmds = 0;
  25
  26 BEGIN {
  27         CGI->compile() if $ENV{'MOD_PERL'};
  28 }
  29
  30 our $version = "++GIT_VERSION++";
  31
  32 our ($my_url, $my_uri, $base_url, $path_info, $home_link);
  33 sub evaluate_uri {
  34         our $cgi;
  35
  36         our $my_url = $cgi->url();
  37         our $my_uri = $cgi->url(-absolute => 1);
  38
  39         # Base URL for relative URLs in gitweb ($logo, $favicon, ...),
  40         # needed and used only for URLs with nonempty PATH_INFO
  41         our $base_url = $my_url;
  42
  43         # When the script is used as DirectoryIndex, the URL does not contain the name
  44         # of the script file itself, and $cgi->url() fails to strip PATH_INFO, so we
  45         # have to do it ourselves. We make $path_info global because it's also used
  46         # later on.
  47         #
  48         # Another issue with the script being the DirectoryIndex is that the resulting
  49         # $my_url data is not the full script URL: this is good, because we want
  50         # generated links to keep implying the script name if it wasn't explicitly
  51         # indicated in the URL we're handling, but it means that $my_url cannot be used
  52         # as base URL.
  53         # Therefore, if we needed to strip PATH_INFO, then we know that we have
  54         # to build the base URL ourselves:
  55         our $path_info = $ENV{"PATH_INFO"};
  56         if ($path_info) {
  57                 if ($my_url =~ s,\Q$path_info\E$,, &&
  58                     $my_uri =~ s,\Q$path_info\E$,, &&
  59                     defined $ENV{'SCRIPT_NAME'}) {
  60                         $base_url = $cgi->url(-base => 1) . $ENV{'SCRIPT_NAME'};
  61                 }
  62         }
  63
  64         # target of the home link on top of all pages
  65         our $home_link = $my_uri || "/";
  66 }
  67
  68 # core git executable to use
  69 # this can just be "git" if your webserver has a sensible PATH
  70 our $GIT = "++GIT_BINDIR++/git";
  71
  72 # absolute fs-path which will be prepended to the project path
  73 #our $projectroot = "/pub/scm";
  74 our $projectroot = "++GITWEB_PROJECTROOT++";
  75
  76 # fs traversing limit for getting project list
  77 # the number is relative to the projectroot
  78 our $project_maxdepth = "++GITWEB_PROJECT_MAXDEPTH++";
  79
  80 # string of the home link on top of all pages
  81 our $home_link_str = "++GITWEB_HOME_LINK_STR++";
  82
  83 # name of your site or organization to appear in page titles
  84 # replace this with something more descriptive for clearer bookmarks
  85 our $site_name = "++GITWEB_SITENAME++"
  86                  || ($ENV{'SERVER_NAME'} || "Untitled") . " Git";
  87
  88 # filename of html text to include at top of each page
  89 our $site_header = "++GITWEB_SITE_HEADER++";
  90 # html text to include at home page
  91 our $home_text = "++GITWEB_HOMETEXT++";
  92 # filename of html text to include at bottom of each page
  93 our $site_footer = "++GITWEB_SITE_FOOTER++";
  94
  95 # URI of stylesheets
  96 our @stylesheets = ("++GITWEB_CSS++");
  97 # URI of a single stylesheet, which can be overridden in GITWEB_CONFIG.
  98 our $stylesheet = undef;
  99 # URI of GIT logo (72x27 size)
 100 our $logo = "++GITWEB_LOGO++";
 101 # URI of GIT favicon, assumed to be image/png type
 102 our $favicon = "++GITWEB_FAVICON++";
 103 # URI of gitweb.js (JavaScript code for gitweb)
 104 our $javascript = "++GITWEB_JS++";
 105
 106 # URI and label (title) of GIT logo link
 107 #our $logo_url = "http://www.kernel.org/pub/software/scm/git/docs/";
 108 #our $logo_label = "git documentation";
 109 our $logo_url = "http://git-scm.com/";
 110 our $logo_label = "git homepage";
 111
 112 # source of projects list
 113 our $projects_list = "++GITWEB_LIST++";
 114
 115 # the width (in characters) of the projects list "Description" column
 116 our $projects_list_description_width = 25;
 117
 118 # default order of projects list
 119 # valid values are none, project, descr, owner, and age
 120 our $default_projects_order = "project";
 121
 122 # show repository only if this file exists
 123 # (only effective if this variable evaluates to true)
 124 our $export_ok = "++GITWEB_EXPORT_OK++";
 125
 126 # show repository only if this subroutine returns true
 127 # when given the path to the project, for example:
 128 #    sub { return -e "$_[0]/git-daemon-export-ok"; }
 129 our $export_auth_hook = undef;
 130
 131 # only allow viewing of repositories also shown on the overview page
 132 our $strict_export = "++GITWEB_STRICT_EXPORT++";
 133
 134 # list of git base URLs used for URL to where fetch project from,
 135 # i.e. full URL is "$git_base_url/$project"
 136 our @git_base_url_list = grep { $_ ne '' } ("++GITWEB_BASE_URL++");
 137
 138 # default blob_plain mimetype and default charset for text/plain blob
 139 our $default_blob_plain_mimetype = 'text/plain';
 140 our $default_text_plain_charset  = undef;
 141
 142 # file to use for guessing MIME types before trying /etc/mime.types
 143 # (relative to the current git repository)
 144 our $mimetypes_file = undef;
 145
 146 # assume this charset if line contains non-UTF-8 characters;
 147 # it should be valid encoding (see Encoding::Supported(3pm) for list),
 148 # for which encoding all byte sequences are valid, for example
 149 # 'iso-8859-1' aka 'latin1' (it is decoded without checking, so it
 150 # could be even 'utf-8' for the old behavior)
 151 our $fallback_encoding = 'latin1';
 152
 153 # rename detection options for git-diff and git-diff-tree
 154 # - default is '-M', with the cost proportional to
 155 #   (number of removed files) * (number of new files).
 156 # - more costly is '-C' (which implies '-M'), with the cost proportional to
 157 #   (number of changed files + number of removed files) * (number of new files)
 158 # - even more costly is '-C', '--find-copies-harder' with cost
 159 #   (number of files in the original tree) * (number of new files)
 160 # - one might want to include '-B' option, e.g. '-B', '-M'
 161 our @diff_opts = ('-M'); # taken from git_commit
 162
 163 # Disables features that would allow repository owners to inject script into
 164 # the gitweb domain.
 165 our $prevent_xss = 0;
 166
 167 # Path to the highlight executable to use (must be the one from
 168 # http://www.andre-simon.de due to assumptions about parameters and output).
 169 # Useful if highlight is not installed on your webserver's PATH.
 170 # [Default: highlight]
 171 our $highlight_bin = "++HIGHLIGHT_BIN++";
 172
 173 # information about snapshot formats that gitweb is capable of serving
 174 our %known_snapshot_formats = (
 175         # name => {
 176         #       'display' => display name,
 177         #       'type' => mime type,
 178         #       'suffix' => filename suffix,
 179         #       'format' => --format for git-archive,
 180         #       'compressor' => [compressor command and arguments]
 181         #                       (array reference, optional)
 182         #       'disabled' => boolean (optional)}
 183         #
 184         'tgz' => {
 185                 'display' => 'tar.gz',
 186                 'type' => 'application/x-gzip',
 187                 'suffix' => '.tar.gz',
 188                 'format' => 'tar',
 189                 'compressor' => ['gzip']},
 190
 191         'tbz2' => {
 192                 'display' => 'tar.bz2',
 193                 'type' => 'application/x-bzip2',
 194                 'suffix' => '.tar.bz2',
 195                 'format' => 'tar',
 196                 'compressor' => ['bzip2']},
 197
 198         'txz' => {
 199                 'display' => 'tar.xz',
 200                 'type' => 'application/x-xz',
 201                 'suffix' => '.tar.xz',
 202                 'format' => 'tar',
 203                 'compressor' => ['xz'],
 204                 'disabled' => 1},
 205
 206         'zip' => {
 207                 'display' => 'zip',
 208                 'type' => 'application/x-zip',
 209                 'suffix' => '.zip',
 210                 'format' => 'zip'},
 211 );
 212
 213 # Aliases so we understand old gitweb.snapshot values in repository
 214 # configuration.
 215 our %known_snapshot_format_aliases = (
 216         'gzip'  => 'tgz',
 217         'bzip2' => 'tbz2',
 218         'xz'    => 'txz',
 219
 220         # backward compatibility: legacy gitweb config support
 221         'x-gzip' => undef, 'gz' => undef,
 222         'x-bzip2' => undef, 'bz2' => undef,
 223         'x-zip' => undef, '' => undef,
 224 );
 225
 226 # Pixel sizes for icons and avatars. If the default font sizes or lineheights
 227 # are changed, it may be appropriate to change these values too via
 228 # $GITWEB_CONFIG.
 229 our %avatar_size = (
 230         'default' => 16,
 231         'double'  => 32
 232 );
 233
 234 # Used to set the maximum load that we will still respond to gitweb queries.
 235 # If server load exceed this value then return "503 server busy" error.
 236 # If gitweb cannot determined server load, it is taken to be 0.
 237 # Leave it undefined (or set to 'undef') to turn off load checking.
 238 our $maxload = 300;
 239
 240 # configuration for 'highlight' (http://www.andre-simon.de/)
 241 # match by basename
 242 our %highlight_basename = (
 243         #'Program' => 'py',
 244         #'Library' => 'py',
 245         'SConstruct' => 'py', # SCons equivalent of Makefile
 246         'Makefile' => 'make',
 247 );
 248 # match by extension
 249 our %highlight_ext = (
 250         # main extensions, defining name of syntax;
 251         # see files in /usr/share/highlight/langDefs/ directory
 252         map { $_ => $_ }
 253                 qw(py c cpp rb java css php sh pl js tex bib xml awk bat ini spec tcl sql make),
 254         # alternate extensions, see /etc/highlight/filetypes.conf
 255         'h' => 'c',
 256         map { $_ => 'sh'  } qw(bash zsh ksh),
 257         map { $_ => 'cpp' } qw(cxx c++ cc),
 258         map { $_ => 'php' } qw(php3 php4 php5 phps),
 259         map { $_ => 'pl'  } qw(perl pm), # perhaps also 'cgi'
 260         map { $_ => 'make'} qw(mak mk),
 261         map { $_ => 'xml' } qw(xhtml html htm),
 262 );
 263
 264 # You define site-wide feature defaults here; override them with
 265 # $GITWEB_CONFIG as necessary.
 266 our %feature = (
 267         # feature => {
 268         #       'sub' => feature-sub (subroutine),
 269         #       'override' => allow-override (boolean),
 270         #       'default' => [ default options...] (array reference)}
 271         #
 272         # if feature is overridable (it means that allow-override has true value),
 273         # then feature-sub will be called with default options as parameters;
 274         # return value of feature-sub indicates if to enable specified feature
 275         #
 276         # if there is no 'sub' key (no feature-sub), then feature cannot be
 277         # overridden
 278         #
 279         # use gitweb_get_feature(<feature>) to retrieve the <feature> value
 280         # (an array) or gitweb_check_feature(<feature>) to check if <feature>
 281         # is enabled
 282
 283         # Enable the 'blame' blob view, showing the last commit that modified
 284         # each line in the file. This can be very CPU-intensive.
 285
 286         # To enable system wide have in $GITWEB_CONFIG
 287         # $feature{'blame'}{'default'} = [1];
 288         # To have project specific config enable override in $GITWEB_CONFIG
 289         # $feature{'blame'}{'override'} = 1;
 290         # and in project config gitweb.blame = 0|1;
 291         'blame' => {
 292                 'sub' => sub { feature_bool('blame', @_) },
 293                 'override' => 0,
 294                 'default' => [0]},
 295
 296         # Enable the 'snapshot' link, providing a compressed archive of any
 297         # tree. This can potentially generate high traffic if you have large
 298         # project.
 299
 300         # Value is a list of formats defined in %known_snapshot_formats that
 301         # you wish to offer.
 302         # To disable system wide have in $GITWEB_CONFIG
 303         # $feature{'snapshot'}{'default'} = [];
 304         # To have project specific config enable override in $GITWEB_CONFIG
 305         # $feature{'snapshot'}{'override'} = 1;
 306         # and in project config, a comma-separated list of formats or "none"
 307         # to disable.  Example: gitweb.snapshot = tbz2,zip;
 308         'snapshot' => {
 309                 'sub' => \&feature_snapshot,
 310                 'override' => 0,
 311                 'default' => ['tgz']},
 312
 313         # Enable text search, which will list the commits which match author,
 314         # committer or commit text to a given string.  Enabled by default.
 315         # Project specific override is not supported.
 316         'search' => {
 317                 'override' => 0,
 318                 'default' => [1]},
 319
 320         # Enable grep search, which will list the files in currently selected
 321         # tree containing the given string. Enabled by default. This can be
 322         # potentially CPU-intensive, of course.
 323
 324         # To enable system wide have in $GITWEB_CONFIG
 325         # $feature{'grep'}{'default'} = [1];
 326         # To have project specific config enable override in $GITWEB_CONFIG
 327         # $feature{'grep'}{'override'} = 1;
 328         # and in project config gitweb.grep = 0|1;
 329         'grep' => {
 330                 'sub' => sub { feature_bool('grep', @_) },
 331                 'override' => 0,
 332                 'default' => [1]},
 333
 334         # Enable the pickaxe search, which will list the commits that modified
 335         # a given string in a file. This can be practical and quite faster
 336         # alternative to 'blame', but still potentially CPU-intensive.
 337
 338         # To enable system wide have in $GITWEB_CONFIG
 339         # $feature{'pickaxe'}{'default'} = [1];
 340         # To have project specific config enable override in $GITWEB_CONFIG
 341         # $feature{'pickaxe'}{'override'} = 1;
 342         # and in project config gitweb.pickaxe = 0|1;
 343         'pickaxe' => {
 344                 'sub' => sub { feature_bool('pickaxe', @_) },
 345                 'override' => 0,
 346                 'default' => [1]},
 347
 348         # Enable showing size of blobs in a 'tree' view, in a separate
 349         # column, similar to what 'ls -l' does.  This cost a bit of IO.
 350
 351         # To disable system wide have in $GITWEB_CONFIG
 352         # $feature{'show-sizes'}{'default'} = [0];
 353         # To have project specific config enable override in $GITWEB_CONFIG
 354         # $feature{'show-sizes'}{'override'} = 1;
 355         # and in project config gitweb.showsizes = 0|1;
 356         'show-sizes' => {
 357                 'sub' => sub { feature_bool('showsizes', @_) },
 358                 'override' => 0,
 359                 'default' => [1]},
 360
 361         # Make gitweb use an alternative format of the URLs which can be
 362         # more readable and natural-looking: project name is embedded
 363         # directly in the path and the query string contains other
 364         # auxiliary information. All gitweb installations recognize
 365         # URL in either format; this configures in which formats gitweb
 366         # generates links.
 367
 368         # To enable system wide have in $GITWEB_CONFIG
 369         # $feature{'pathinfo'}{'default'} = [1];
 370         # Project specific override is not supported.
 371
 372         # Note that you will need to change the default location of CSS,
 373         # favicon, logo and possibly other files to an absolute URL. Also,
 374         # if gitweb.cgi serves as your indexfile, you will need to force
 375         # $my_uri to contain the script name in your $GITWEB_CONFIG.
 376         'pathinfo' => {
 377                 'override' => 0,
 378                 'default' => [0]},
 379
 380         # Make gitweb consider projects in project root subdirectories
 381         # to be forks of existing projects. Given project $projname.git,
 382         # projects matching $projname/*.git will not be shown in the main
 383         # projects list, instead a '+' mark will be added to $projname
 384         # there and a 'forks' view will be enabled for the project, listing
 385         # all the forks. If project list is taken from a file, forks have
 386         # to be listed after the main project.
 387
 388         # To enable system wide have in $GITWEB_CONFIG
 389         # $feature{'forks'}{'default'} = [1];
 390         # Project specific override is not supported.
 391         'forks' => {
 392                 'override' => 0,
 393                 'default' => [0]},
 394
 395         # Insert custom links to the action bar of all project pages.
 396         # This enables you mainly to link to third-party scripts integrating
 397         # into gitweb; e.g. git-browser for graphical history representation
 398         # or custom web-based repository administration interface.
 399
 400         # The 'default' value consists of a list of triplets in the form
 401         # (label, link, position) where position is the label after which
 402         # to insert the link and link is a format string where %n expands
 403         # to the project name, %f to the project path within the filesystem,
 404         # %h to the current hash (h gitweb parameter) and %b to the current
 405         # hash base (hb gitweb parameter); %% expands to %.
 406
 407         # To enable system wide have in $GITWEB_CONFIG e.g.
 408         # $feature{'actions'}{'default'} = [('graphiclog',
 409         #       '/git-browser/by-commit.html?r=%n', 'summary')];
 410         # Project specific override is not supported.
 411         'actions' => {
 412                 'override' => 0,
 413                 'default' => []},
 414
 415         # Allow gitweb scan project content tags described in ctags/
 416         # of project repository, and display the popular Web 2.0-ish
 417         # "tag cloud" near the project list. Note that this is something
 418         # COMPLETELY different from the normal Git tags.
 419
 420         # gitweb by itself can show existing tags, but it does not handle
 421         # tagging itself; you need an external application for that.
 422         # For an example script, check Girocco's cgi/tagproj.cgi.
 423         # You may want to install the HTML::TagCloud Perl module to get
 424         # a pretty tag cloud instead of just a list of tags.
 425
 426         # To enable system wide have in $GITWEB_CONFIG
 427         # $feature{'ctags'}{'default'} = ['path_to_tag_script'];
 428         # Project specific override is not supported.
 429         'ctags' => {
 430                 'override' => 0,
 431                 'default' => [0]},
 432
 433         # The maximum number of patches in a patchset generated in patch
 434         # view. Set this to 0 or undef to disable patch view, or to a
 435         # negative number to remove any limit.
 436
 437         # To disable system wide have in $GITWEB_CONFIG
 438         # $feature{'patches'}{'default'} = [0];
 439         # To have project specific config enable override in $GITWEB_CONFIG
 440         # $feature{'patches'}{'override'} = 1;
 441         # and in project config gitweb.patches = 0|n;
 442         # where n is the maximum number of patches allowed in a patchset.
 443         'patches' => {
 444                 'sub' => \&feature_patches,
 445                 'override' => 0,
 446                 'default' => [16]},
 447
 448         # Avatar support. When this feature is enabled, views such as
 449         # shortlog or commit will display an avatar associated with
 450         # the email of the committer(s) and/or author(s).
 451
 452         # Currently available providers are gravatar and picon.
 453         # If an unknown provider is specified, the feature is disabled.
 454
 455         # Gravatar depends on Digest::MD5.
 456         # Picon currently relies on the indiana.edu database.
 457
 458         # To enable system wide have in $GITWEB_CONFIG
 459         # $feature{'avatar'}{'default'} = ['<provider>'];
 460         # where <provider> is either gravatar or picon.
 461         # To have project specific config enable override in $GITWEB_CONFIG
 462         # $feature{'avatar'}{'override'} = 1;
 463         # and in project config gitweb.avatar = <provider>;
 464         'avatar' => {
 465                 'sub' => \&feature_avatar,
 466                 'override' => 0,
 467                 'default' => ['']},
 468
 469         # Enable displaying how much time and how many git commands
 470         # it took to generate and display page.  Disabled by default.
 471         # Project specific override is not supported.
 472         'timed' => {
 473                 'override' => 0,
 474                 'default' => [0]},
 475
 476         # Enable turning some links into links to actions which require
 477         # JavaScript to run (like 'blame_incremental').  Not enabled by
 478         # default.  Project specific override is currently not supported.
 479         'javascript-actions' => {
 480                 'override' => 0,
 481                 'default' => [0]},
 482
 483         # Syntax highlighting support. This is based on Daniel Svensson's
 484         # and Sham Chukoury's work in gitweb-xmms2.git.
 485         # It requires the 'highlight' program present in $PATH,
 486         # and therefore is disabled by default.
 487
 488         # To enable system wide have in $GITWEB_CONFIG
 489         # $feature{'highlight'}{'default'} = [1];
 490
 491         'highlight' => {
 492                 'sub' => sub { feature_bool('highlight', @_) },
 493                 'override' => 0,
 494                 'default' => [0]},
 495
 496         # Enable displaying of remote heads in the heads list
 497
 498         # To enable system wide have in $GITWEB_CONFIG
 499         # $feature{'remote_heads'}{'default'} = [1];
 500         # To have project specific config enable override in $GITWEB_CONFIG
 501         # $feature{'remote_heads'}{'override'} = 1;
 502         # and in project config gitweb.remote_heads = 0|1;
 503         'remote_heads' => {
 504                 'sub' => sub { feature_bool('remote_heads', @_) },
 505                 'override' => 0,
 506                 'default' => [0]},
 507 );
 508
 509 sub gitweb_get_feature {
 510         my ($name) = @_;
 511         return unless exists $feature{$name};
 512         my ($sub, $override, @defaults) = (
 513                 $feature{$name}{'sub'},
 514                 $feature{$name}{'override'},
 515                 @{$feature{$name}{'default'}});
 516         # project specific override is possible only if we have project
 517         our $git_dir; # global variable, declared later
 518         if (!$override || !defined $git_dir) {
 519                 return @defaults;
 520         }
 521         if (!defined $sub) {
 522                 warn "feature $name is not overridable";
 523                 return @defaults;
 524         }
 525         return $sub->(@defaults);
 526 }
 527
 528 # A wrapper to check if a given feature is enabled.
 529 # With this, you can say
 530 #
 531 #   my $bool_feat = gitweb_check_feature('bool_feat');
 532 #   gitweb_check_feature('bool_feat') or somecode;
 533 #
 534 # instead of
 535 #
 536 #   my ($bool_feat) = gitweb_get_feature('bool_feat');
 537 #   (gitweb_get_feature('bool_feat'))[0] or somecode;
 538 #
 539 sub gitweb_check_feature {
 540         return (gitweb_get_feature(@_))[0];
 541 }
 542
 543
 544 sub feature_bool {
 545         my $key = shift;
 546         my ($val) = git_get_project_config($key, '--bool');
 547
 548         if (!defined $val) {
 549                 return ($_[0]);
 550         } elsif ($val eq 'true') {
 551                 return (1);
 552         } elsif ($val eq 'false') {
 553                 return (0);
 554         }
 555 }
 556
 557 sub feature_snapshot {
 558         my (@fmts) = @_;
 559
 560         my ($val) = git_get_project_config('snapshot');
 561
 562         if ($val) {
 563                 @fmts = ($val eq 'none' ? () : split /\s*[,\s]\s*/, $val);
 564         }
 565
 566         return @fmts;
 567 }
 568
 569 sub feature_patches {
 570         my @val = (git_get_project_config('patches', '--int'));
 571
 572         if (@val) {
 573                 return @val;
 574         }
 575
 576         return ($_[0]);
 577 }
 578
 579 sub feature_avatar {
 580         my @val = (git_get_project_config('avatar'));
 581
 582         return @val ? @val : @_;
 583 }
 584
 585 # checking HEAD file with -e is fragile if the repository was
 586 # initialized long time ago (i.e. symlink HEAD) and was pack-ref'ed
 587 # and then pruned.
 588 sub check_head_link {
 589         my ($dir) = @_;
 590         my $headfile = "$dir/HEAD";
 591         return ((-e $headfile) ||
 592                 (-l $headfile && readlink($headfile) =~ /^refs\/heads\//));
 593 }
 594
 595 sub check_export_ok {
 596         my ($dir) = @_;
 597         return (check_head_link($dir) &&
 598                 (!$export_ok || -e "$dir/$export_ok") &&
 599                 (!$export_auth_hook || $export_auth_hook->($dir)));
 600 }
 601
 602 # process alternate names for backward compatibility
 603 # filter out unsupported (unknown) snapshot formats
 604 sub filter_snapshot_fmts {
 605         my @fmts = @_;
 606
 607         @fmts = map {
 608                 exists $known_snapshot_format_aliases{$_} ?
 609                        $known_snapshot_format_aliases{$_} : $_} @fmts;
 610         @fmts = grep {
 611                 exists $known_snapshot_formats{$_} &&
 612                 !$known_snapshot_formats{$_}{'disabled'}} @fmts;
 613 }
 614
 615 # If it is set to code reference, it is code that it is to be run once per
 616 # request, allowing updating configurations that change with each request,
 617 # while running other code in config file only once.
 618 #
 619 # Otherwise, if it is false then gitweb would process config file only once;
 620 # if it is true then gitweb config would be run for each request.
 621 our $per_request_config = 1;
 622
 623 our ($GITWEB_CONFIG, $GITWEB_CONFIG_SYSTEM);
 624 sub evaluate_gitweb_config {
 625         our $GITWEB_CONFIG = $ENV{'GITWEB_CONFIG'} || "++GITWEB_CONFIG++";
 626         our $GITWEB_CONFIG_SYSTEM = $ENV{'GITWEB_CONFIG_SYSTEM'} || "++GITWEB_CONFIG_SYSTEM++";
 627         # die if there are errors parsing config file
 628         if (-e $GITWEB_CONFIG) {
 629                 do $GITWEB_CONFIG;
 630                 die $@ if $@;
 631         } elsif (-e $GITWEB_CONFIG_SYSTEM) {
 632                 do $GITWEB_CONFIG_SYSTEM;
 633                 die $@ if $@;
 634         }
 635 }
 636
 637 # Get loadavg of system, to compare against $maxload.
 638 # Currently it requires '/proc/loadavg' present to get loadavg;
 639 # if it is not present it returns 0, which means no load checking.
 640 sub get_loadavg {
 641         if( -e '/proc/loadavg' ){
 642                 open my $fd, '<', '/proc/loadavg'
 643                         or return 0;
 644                 my @load = split(/\s+/, scalar <$fd>);
 645                 close $fd;
 646
 647                 # The first three columns measure CPU and IO utilization of the last one,
 648                 # five, and 10 minute periods.  The fourth column shows the number of
 649                 # currently running processes and the total number of processes in the m/n
 650                 # format.  The last column displays the last process ID used.
 651                 return $load[0] || 0;
 652         }
 653         # additional checks for load average should go here for things that don't export
 654         # /proc/loadavg
 655
 656         return 0;
 657 }
 658
 659 # version of the core git binary
 660 our $git_version;
 661 sub evaluate_git_version {
 662         our $git_version = qx("$GIT" --version) =~ m/git version (.*)$/ ? $1 : "unknown";
 663         $number_of_git_cmds++;
 664 }
 665
 666 sub check_loadavg {
 667         if (defined $maxload && get_loadavg() > $maxload) {
 668                 die_error(503, "The load average on the server is too high");
 669         }
 670 }
 671
 672 # ======================================================================
 673 # input validation and dispatch
 674
 675 # input parameters can be collected from a variety of sources (presently, CGI
 676 # and PATH_INFO), so we define an %input_params hash that collects them all
 677 # together during validation: this allows subsequent uses (e.g. href()) to be
 678 # agnostic of the parameter origin
 679
 680 our %input_params = ();
 681
 682 # input parameters are stored with the long parameter name as key. This will
 683 # also be used in the href subroutine to convert parameters to their CGI
 684 # equivalent, and since the href() usage is the most frequent one, we store
 685 # the name -> CGI key mapping here, instead of the reverse.
 686 #
 687 # XXX: Warning: If you touch this, check the search form for updating,
 688 # too.
 689
 690 our @cgi_param_mapping = (
 691         project => "p",
 692         action => "a",
 693         file_name => "f",
 694         file_parent => "fp",
 695         hash => "h",
 696         hash_parent => "hp",
 697         hash_base => "hb",
 698         hash_parent_base => "hpb",
 699         page => "pg",
 700         order => "o",
 701         searchtext => "s",
 702         searchtype => "st",
 703         snapshot_format => "sf",
 704         extra_options => "opt",
 705         search_use_regexp => "sr",
 706         # this must be last entry (for manipulation from JavaScript)
 707         javascript => "js"
 708 );
 709 our %cgi_param_mapping = @cgi_param_mapping;
 710
 711 # we will also need to know the possible actions, for validation
 712 our %actions = (
 713         "blame" => \&git_blame,
 714         "blame_incremental" => \&git_blame_incremental,
 715         "blame_data" => \&git_blame_data,
 716         "blobdiff" => \&git_blobdiff,
 717         "blobdiff_plain" => \&git_blobdiff_plain,
 718         "blob" => \&git_blob,
 719         "blob_plain" => \&git_blob_plain,
 720         "commitdiff" => \&git_commitdiff,
 721         "commitdiff_plain" => \&git_commitdiff_plain,
 722         "commit" => \&git_commit,
 723         "forks" => \&git_forks,
 724         "heads" => \&git_heads,
 725         "history" => \&git_history,
 726         "log" => \&git_log,
 727         "patch" => \&git_patch,
 728         "patches" => \&git_patches,
 729         "remotes" => \&git_remotes,
 730         "rss" => \&git_rss,
 731         "atom" => \&git_atom,
 732         "search" => \&git_search,
 733         "search_help" => \&git_search_help,
 734         "shortlog" => \&git_shortlog,
 735         "summary" => \&git_summary,
 736         "tag" => \&git_tag,
 737         "tags" => \&git_tags,
 738         "tree" => \&git_tree,
 739         "snapshot" => \&git_snapshot,
 740         "object" => \&git_object,
 741         # those below don't need $project
 742         "opml" => \&git_opml,
 743         "project_list" => \&git_project_list,
 744         "project_index" => \&git_project_index,
 745 );
 746
 747 # finally, we have the hash of allowed extra_options for the commands that
 748 # allow them
 749 our %allowed_options = (
 750         "--no-merges" => [ qw(rss atom log shortlog history) ],
 751 );
 752
 753 # fill %input_params with the CGI parameters. All values except for 'opt'
 754 # should be single values, but opt can be an array. We should probably
 755 # build an array of parameters that can be multi-valued, but since for the time
 756 # being it's only this one, we just single it out
 757 sub evaluate_query_params {
 758         our $cgi;
 759
 760         while (my ($name, $symbol) = each %cgi_param_mapping) {
 761                 if ($symbol eq 'opt') {
 762                         $input_params{$name} = [ $cgi->param($symbol) ];
 763                 } else {
 764                         $input_params{$name} = $cgi->param($symbol);
 765                 }
 766         }
 767 }
 768
 769 # now read PATH_INFO and update the parameter list for missing parameters
 770 sub evaluate_path_info {
 771         return if defined $input_params{'project'};
 772         return if !$path_info;
 773         $path_info =~ s,^/+,,;
 774         return if !$path_info;
 775
 776         # find which part of PATH_INFO is project
 777         my $project = $path_info;
 778         $project =~ s,/+$,,;
 779         while ($project && !check_head_link("$projectroot/$project")) {
 780                 $project =~ s,/*[^/]*$,,;
 781         }
 782         return unless $project;
 783         $input_params{'project'} = $project;
 784
 785         # do not change any parameters if an action is given using the query string
 786         return if $input_params{'action'};
 787         $path_info =~ s,^\Q$project\E/*,,;
 788
 789         # next, check if we have an action
 790         my $action = $path_info;
 791         $action =~ s,/.*$,,;
 792         if (exists $actions{$action}) {
 793                 $path_info =~ s,^$action/*,,;
 794                 $input_params{'action'} = $action;
 795         }
 796
 797         # list of actions that want hash_base instead of hash, but can have no
 798         # pathname (f) parameter
 799         my @wants_base = (
 800                 'tree',
 801                 'history',
 802         );
 803
 804         # we want to catch, among others
 805         # [$hash_parent_base[:$file_parent]..]$hash_parent[:$file_name]
 806         my ($parentrefname, $parentpathname, $refname, $pathname) =
 807                 ($path_info =~ /^(?:(.+?)(?::(.+))?\.\.)?([^:]+?)?(?::(.+))?$/);
 808
 809         # first, analyze the 'current' part
 810         if (defined $pathname) {
 811                 # we got "branch:filename" or "branch:dir/"
 812                 # we could use git_get_type(branch:pathname), but:
 813                 # - it needs $git_dir
 814                 # - it does a git() call
 815                 # - the convention of terminating directories with a slash
 816                 #   makes it superfluous
 817                 # - embedding the action in the PATH_INFO would make it even
 818                 #   more superfluous
 819                 $pathname =~ s,^/+,,;
 820                 if (!$pathname || substr($pathname, -1) eq "/") {
 821                         $input_params{'action'} ||= "tree";
 822                         $pathname =~ s,/$,,;
 823                 } else {
 824                         # the default action depends on whether we had parent info
 825                         # or not
 826                         if ($parentrefname) {
 827                                 $input_params{'action'} ||= "blobdiff_plain";
 828                         } else {
 829                                 $input_params{'action'} ||= "blob_plain";
 830                         }
 831                 }
 832                 $input_params{'hash_base'} ||= $refname;
 833                 $input_params{'file_name'} ||= $pathname;
 834         } elsif (defined $refname) {
 835                 # we got "branch". In this case we have to choose if we have to
 836                 # set hash or hash_base.
 837                 #
 838                 # Most of the actions without a pathname only want hash to be
 839                 # set, except for the ones specified in @wants_base that want
 840                 # hash_base instead. It should also be noted that hand-crafted
 841                 # links having 'history' as an action and no pathname or hash
 842                 # set will fail, but that happens regardless of PATH_INFO.
 843                 if (defined $parentrefname) {
 844                         # if there is parent let the default be 'shortlog' action
 845                         # (for http://git.example.com/repo.git/A..B links); if there
 846                         # is no parent, dispatch will detect type of object and set
 847                         # action appropriately if required (if action is not set)
 848                         $input_params{'action'} ||= "shortlog";
 849                 }
 850                 if ($input_params{'action'} &&
 851                     grep { $_ eq $input_params{'action'} } @wants_base) {
 852                         $input_params{'hash_base'} ||= $refname;
 853                 } else {
 854                         $input_params{'hash'} ||= $refname;
 855                 }
 856         }
 857
 858         # next, handle the 'parent' part, if present
 859         if (defined $parentrefname) {
 860                 # a missing pathspec defaults to the 'current' filename, allowing e.g.
 861                 # someproject/blobdiff/oldrev..newrev:/filename
 862                 if ($parentpathname) {
 863                         $parentpathname =~ s,^/+,,;
 864                         $parentpathname =~ s,/$,,;
 865                         $input_params{'file_parent'} ||= $parentpathname;
 866                 } else {
 867                         $input_params{'file_parent'} ||= $input_params{'file_name'};
 868                 }
 869                 # we assume that hash_parent_base is wanted if a path was specified,
 870                 # or if the action wants hash_base instead of hash
 871                 if (defined $input_params{'file_parent'} ||
 872                         grep { $_ eq $input_params{'action'} } @wants_base) {
 873                         $input_params{'hash_parent_base'} ||= $parentrefname;
 874                 } else {
 875                         $input_params{'hash_parent'} ||= $parentrefname;
 876                 }
 877         }
 878
 879         # for the snapshot action, we allow URLs in the form
 880         # $project/snapshot/$hash.ext
 881         # where .ext determines the snapshot and gets removed from the
 882         # passed $refname to provide the $hash.
 883         #
 884         # To be able to tell that $refname includes the format extension, we
 885         # require the following two conditions to be satisfied:
 886         # - the hash input parameter MUST have been set from the $refname part
 887         #   of the URL (i.e. they must be equal)
 888         # - the snapshot format MUST NOT have been defined already (e.g. from
 889         #   CGI parameter sf)
 890         # It's also useless to try any matching unless $refname has a dot,
 891         # so we check for that too
 892         if (defined $input_params{'action'} &&
 893                 $input_params{'action'} eq 'snapshot' &&
 894                 defined $refname && index($refname, '.') != -1 &&
 895                 $refname eq $input_params{'hash'} &&
 896                 !defined $input_params{'snapshot_format'}) {
 897                 # We loop over the known snapshot formats, checking for
 898                 # extensions. Allowed extensions are both the defined suffix
 899                 # (which includes the initial dot already) and the snapshot
 900                 # format key itself, with a prepended dot
 901                 while (my ($fmt, $opt) = each %known_snapshot_formats) {
 902                         my $hash = $refname;
 903                         unless ($hash =~ s/(\Q$opt->{'suffix'}\E|\Q.$fmt\E)$//) {
 904                                 next;
 905                         }
 906                         my $sfx = $1;
 907                         # a valid suffix was found, so set the snapshot format
 908                         # and reset the hash parameter
 909                         $input_params{'snapshot_format'} = $fmt;
 910                         $input_params{'hash'} = $hash;
 911                         # we also set the format suffix to the one requested
 912                         # in the URL: this way a request for e.g. .tgz returns
 913                         # a .tgz instead of a .tar.gz
 914                         $known_snapshot_formats{$fmt}{'suffix'} = $sfx;
 915                         last;
 916                 }
 917         }
 918 }
 919
 920 our ($action, $project, $file_name, $file_parent, $hash, $hash_parent, $hash_base,
 921      $hash_parent_base, @extra_options, $page, $searchtype, $search_use_regexp,
 922      $searchtext, $search_regexp);
 923 sub evaluate_and_validate_params {
 924         our $action = $input_params{'action'};
 925         if (defined $action) {
 926                 if (!validate_action($action)) {
 927                         die_error(400, "Invalid action parameter");
 928                 }
 929         }
 930
 931         # parameters which are pathnames
 932         our $project = $input_params{'project'};
 933         if (defined $project) {
 934                 if (!validate_project($project)) {
 935                         undef $project;
 936                         die_error(404, "No such project");
 937                 }
 938         }
 939
 940         our $file_name = $input_params{'file_name'};
 941         if (defined $file_name) {
 942                 if (!validate_pathname($file_name)) {
 943                         die_error(400, "Invalid file parameter");
 944                 }
 945         }
 946
 947         our $file_parent = $input_params{'file_parent'};
 948         if (defined $file_parent) {
 949                 if (!validate_pathname($file_parent)) {
 950                         die_error(400, "Invalid file parent parameter");
 951                 }
 952         }
 953
 954         # parameters which are refnames
 955         our $hash = $input_params{'hash'};
 956         if (defined $hash) {
 957                 if (!validate_refname($hash)) {
 958                         die_error(400, "Invalid hash parameter");
 959                 }
 960         }
 961
 962         our $hash_parent = $input_params{'hash_parent'};
 963         if (defined $hash_parent) {
 964                 if (!validate_refname($hash_parent)) {
 965                         die_error(400, "Invalid hash parent parameter");
 966                 }
 967         }
 968
 969         our $hash_base = $input_params{'hash_base'};
 970         if (defined $hash_base) {
 971                 if (!validate_refname($hash_base)) {
 972                         die_error(400, "Invalid hash base parameter");
 973                 }
 974         }
 975
 976         our @extra_options = @{$input_params{'extra_options'}};
 977         # @extra_options is always defined, since it can only be (currently) set from
 978         # CGI, and $cgi->param() returns the empty array in array context if the param
 979         # is not set
 980         foreach my $opt (@extra_options) {
 981                 if (not exists $allowed_options{$opt}) {
 982                         die_error(400, "Invalid option parameter");
 983                 }
 984                 if (not grep(/^$action$/, @{$allowed_options{$opt}})) {
 985                         die_error(400, "Invalid option parameter for this action");
 986                 }
 987         }
 988
 989         our $hash_parent_base = $input_params{'hash_parent_base'};
 990         if (defined $hash_parent_base) {
 991                 if (!validate_refname($hash_parent_base)) {
 992                         die_error(400, "Invalid hash parent base parameter");
 993                 }
 994         }
 995
 996         # other parameters
 997         our $page = $input_params{'page'};
 998         if (defined $page) {
 999                 if ($page =~ m/[^0-9]/) {
1000                         die_error(400, "Invalid page parameter");
1001                 }
1002         }
1003
1004         our $searchtype = $input_params{'searchtype'};
1005         if (defined $searchtype) {
1006                 if ($searchtype =~ m/[^a-z]/) {
1007                         die_error(400, "Invalid searchtype parameter");
1008                 }
1009         }
1010
1011         our $search_use_regexp = $input_params{'search_use_regexp'};
1012
1013         our $searchtext = $input_params{'searchtext'};
1014         our $search_regexp;
1015         if (defined $searchtext) {
1016                 if (length($searchtext) < 2) {
1017                         die_error(403, "At least two characters are required for search parameter");
1018                 }
1019                 $search_regexp = $search_use_regexp ? $searchtext : quotemeta $searchtext;
1020         }
1021 }
1022
1023 # path to the current git repository
1024 our $git_dir;
1025 sub evaluate_git_dir {
1026         our $git_dir = "$projectroot/$project" if $project;
1027 }
1028
1029 our (@snapshot_fmts, $git_avatar);
1030 sub configure_gitweb_features {
1031         # list of supported snapshot formats
1032         our @snapshot_fmts = gitweb_get_feature('snapshot');
1033         @snapshot_fmts = filter_snapshot_fmts(@snapshot_fmts);
1034
1035         # check that the avatar feature is set to a known provider name,
1036         # and for each provider check if the dependencies are satisfied.
1037         # if the provider name is invalid or the dependencies are not met,
1038         # reset $git_avatar to the empty string.
1039         our ($git_avatar) = gitweb_get_feature('avatar');
1040         if ($git_avatar eq 'gravatar') {
1041                 $git_avatar = '' unless (eval { require Digest::MD5; 1; });
1042         } elsif ($git_avatar eq 'picon') {
1043                 # no dependencies
1044         } else {
1045                 $git_avatar = '';
1046         }
1047 }
1048
1049 # custom error handler: 'die <message>' is Internal Server Error
1050 sub handle_errors_html {
1051         my $msg = shift; # it is already HTML escaped
1052
1053         # to avoid infinite loop where error occurs in die_error,
1054         # change handler to default handler, disabling handle_errors_html
1055         set_message("Error occured when inside die_error:\n$msg");
1056
1057         # you cannot jump out of die_error when called as error handler;
1058         # the subroutine set via CGI::Carp::set_message is called _after_
1059         # HTTP headers are already written, so it cannot write them itself
1060         die_error(undef, undef, $msg, -error_handler => 1, -no_http_header => 1);
1061 }
1062 set_message(\&handle_errors_html);
1063
1064 # dispatch
1065 sub dispatch {
1066         if (!defined $action) {
1067                 if (defined $hash) {
1068                         $action = git_get_type($hash);
1069                 } elsif (defined $hash_base && defined $file_name) {
1070                         $action = git_get_type("$hash_base:$file_name");
1071                 } elsif (defined $project) {
1072                         $action = 'summary';
1073                 } else {
1074                         $action = 'project_list';
1075                 }
1076         }
1077         if (!defined($actions{$action})) {
1078                 die_error(400, "Unknown action");
1079         }
1080         if ($action !~ m/^(?:opml|project_list|project_index)$/ &&
1081             !$project) {
1082                 die_error(400, "Project needed");
1083         }
1084         $actions{$action}->();
1085 }
1086
1087 sub reset_timer {
1088         our $t0 = [ gettimeofday() ]
1089                 if defined $t0;
1090         our $number_of_git_cmds = 0;
1091 }
1092
1093 our $first_request = 1;
1094 sub run_request {
1095         reset_timer();
1096
1097         evaluate_uri();
1098         if ($first_request) {
1099                 evaluate_gitweb_config();
1100                 evaluate_git_version();
1101         }
1102         if ($per_request_config) {
1103                 if (ref($per_request_config) eq 'CODE') {
1104                         $per_request_config->();
1105                 } elsif (!$first_request) {
1106                         evaluate_gitweb_config();
1107                 }
1108         }
1109         check_loadavg();
1110
1111         # $projectroot and $projects_list might be set in gitweb config file
1112         $projects_list ||= $projectroot;
1113
1114         evaluate_query_params();
1115         evaluate_path_info();
1116         evaluate_and_validate_params();
1117         evaluate_git_dir();
1118
1119         configure_gitweb_features();
1120
1121         dispatch();
1122 }
1123
1124 our $is_last_request = sub { 1 };
1125 our ($pre_dispatch_hook, $post_dispatch_hook, $pre_listen_hook);
1126 our $CGI = 'CGI';
1127 our $cgi;
1128 sub configure_as_fcgi {
1129         require CGI::Fast;
1130         our $CGI = 'CGI::Fast';
1131
1132         my $request_number = 0;
1133         # let each child service 100 requests
1134         our $is_last_request = sub { ++$request_number > 100 };
1135 }
1136 sub evaluate_argv {
1137         my $script_name = $ENV{'SCRIPT_NAME'} || $ENV{'SCRIPT_FILENAME'} || __FILE__;
1138         configure_as_fcgi()
1139                 if $script_name =~ /\.fcgi$/;
1140
1141         return unless (@ARGV);
1142
1143         require Getopt::Long;
1144         Getopt::Long::GetOptions(
1145                 'fastcgi|fcgi|f' => \&configure_as_fcgi,
1146                 'nproc|n=i' => sub {
1147                         my ($arg, $val) = @_;
1148                         return unless eval { require FCGI::ProcManager; 1; };
1149                         my $proc_manager = FCGI::ProcManager->new({
1150                                 n_processes => $val,
1151                         });
1152                         our $pre_listen_hook    = sub { $proc_manager->pm_manage()        };
1153                         our $pre_dispatch_hook  = sub { $proc_manager->pm_pre_dispatch()  };
1154                         our $post_dispatch_hook = sub { $proc_manager->pm_post_dispatch() };
1155                 },
1156         );
1157 }
1158
1159 sub run {
1160         evaluate_argv();
1161
1162         $first_request = 1;
1163         $pre_listen_hook->()
1164                 if $pre_listen_hook;
1165
1166  REQUEST:
1167         while ($cgi = $CGI->new()) {
1168                 $pre_dispatch_hook->()
1169                         if $pre_dispatch_hook;
1170
1171                 run_request();
1172
1173                 $post_dispatch_hook->()
1174                         if $post_dispatch_hook;
1175                 $first_request = 0;
1176
1177                 last REQUEST if ($is_last_request->());
1178         }
1179
1180  DONE_GITWEB:
1181         1;
1182 }
1183
1184 run();
1185
1186 if (defined caller) {
1187         # wrapped in a subroutine processing requests,
1188         # e.g. mod_perl with ModPerl::Registry, or PSGI with Plack::App::WrapCGI
1189         return;
1190 } else {
1191         # pure CGI script, serving single request
1192         exit;
1193 }
1194
1195 ## ======================================================================
1196 ## action links
1197
1198 # possible values of extra options
1199 # -full => 0|1      - use absolute/full URL ($my_uri/$my_url as base)
1200 # -replay => 1      - start from a current view (replay with modifications)
1201 # -path_info => 0|1 - don't use/use path_info URL (if possible)
1202 sub href {
1203         my %params = @_;
1204         # default is to use -absolute url() i.e. $my_uri
1205         my $href = $params{-full} ? $my_url : $my_uri;
1206
1207         $params{'project'} = $project unless exists $params{'project'};
1208
1209         if ($params{-replay}) {
1210                 while (my ($name, $symbol) = each %cgi_param_mapping) {
1211                         if (!exists $params{$name}) {
1212                                 $params{$name} = $input_params{$name};
1213                         }
1214                 }
1215         }
1216
1217         my $use_pathinfo = gitweb_check_feature('pathinfo');
1218         if (defined $params{'project'} &&
1219             (exists $params{-path_info} ? $params{-path_info} : $use_pathinfo)) {
1220                 # try to put as many parameters as possible in PATH_INFO:
1221                 #   - project name
1222                 #   - action
1223                 #   - hash_parent or hash_parent_base:/file_parent
1224                 #   - hash or hash_base:/filename
1225                 #   - the snapshot_format as an appropriate suffix
1226
1227                 # When the script is the root DirectoryIndex for the domain,
1228                 # $href here would be something like http://gitweb.example.com/
1229                 # Thus, we strip any trailing / from $href, to spare us double
1230                 # slashes in the final URL
1231                 $href =~ s,/$,,;
1232
1233                 # Then add the project name, if present
1234                 $href .= "/".esc_path_info($params{'project'});
1235                 delete $params{'project'};
1236
1237                 # since we destructively absorb parameters, we keep this
1238                 # boolean that remembers if we're handling a snapshot
1239                 my $is_snapshot = $params{'action'} eq 'snapshot';
1240
1241                 # Summary just uses the project path URL, any other action is
1242                 # added to the URL
1243                 if (defined $params{'action'}) {
1244                         $href .= "/".esc_path_info($params{'action'})
1245                                 unless $params{'action'} eq 'summary';
1246                         delete $params{'action'};
1247                 }
1248
1249                 # Next, we put hash_parent_base:/file_parent..hash_base:/file_name,
1250                 # stripping nonexistent or useless pieces
1251                 $href .= "/" if ($params{'hash_base'} || $params{'hash_parent_base'}
1252                         || $params{'hash_parent'} || $params{'hash'});
1253                 if (defined $params{'hash_base'}) {
1254                         if (defined $params{'hash_parent_base'}) {
1255                                 $href .= esc_path_info($params{'hash_parent_base'});
1256                                 # skip the file_parent if it's the same as the file_name
1257                                 if (defined $params{'file_parent'}) {
1258                                         if (defined $params{'file_name'} && $params{'file_parent'} eq $params{'file_name'}) {
1259                                                 delete $params{'file_parent'};
1260                                         } elsif ($params{'file_parent'} !~ /\.\./) {
1261                                                 $href .= ":/".esc_path_info($params{'file_parent'});
1262                                                 delete $params{'file_parent'};
1263                                         }
1264                                 }
1265                                 $href .= "..";
1266                                 delete $params{'hash_parent'};
1267                                 delete $params{'hash_parent_base'};
1268                         } elsif (defined $params{'hash_parent'}) {
1269                                 $href .= esc_path_info($params{'hash_parent'}). "..";
1270                                 delete $params{'hash_parent'};
1271                         }
1272
1273                         $href .= esc_path_info($params{'hash_base'});
1274                         if (defined $params{'file_name'} && $params{'file_name'} !~ /\.\./) {
1275                                 $href .= ":/".esc_path_info($params{'file_name'});
1276                                 delete $params{'file_name'};
1277                         }
1278                         delete $params{'hash'};
1279                         delete $params{'hash_base'};
1280                 } elsif (defined $params{'hash'}) {
1281                         $href .= esc_path_info($params{'hash'});
1282                         delete $params{'hash'};
1283                 }
1284
1285                 # If the action was a snapshot, we can absorb the
1286                 # snapshot_format parameter too
1287                 if ($is_snapshot) {
1288                         my $fmt = $params{'snapshot_format'};
1289                         # snapshot_format should always be defined when href()
1290                         # is called, but just in case some code forgets, we
1291                         # fall back to the default
1292                         $fmt ||= $snapshot_fmts[0];
1293                         $href .= $known_snapshot_formats{$fmt}{'suffix'};
1294                         delete $params{'snapshot_format'};
1295                 }
1296         }
1297
1298         # now encode the parameters explicitly
1299         my @result = ();
1300         for (my $i = 0; $i < @cgi_param_mapping; $i += 2) {
1301                 my ($name, $symbol) = ($cgi_param_mapping[$i], $cgi_param_mapping[$i+1]);
1302                 if (defined $params{$name}) {
1303                         if (ref($params{$name}) eq "ARRAY") {
1304                                 foreach my $par (@{$params{$name}}) {
1305                                         push @result, $symbol . "=" . esc_param($par);
1306                                 }
1307                         } else {
1308                                 push @result, $symbol . "=" . esc_param($params{$name});
1309                         }
1310                 }
1311         }
1312         $href .= "?" . join(';', @result) if scalar @result;
1313
1314         # final transformation: trailing spaces must be escaped (URI-encoded)
1315         $href =~ s/(\s+)$/CGI::escape($1)/e;
1316
1317         return $href;
1318 }
1319
1320
1321 ## ======================================================================
1322 ## validation, quoting/unquoting and escaping
1323
1324 sub validate_action {
1325         my $input = shift || return undef;
1326         return undef unless exists $actions{$input};
1327         return $input;
1328 }
1329
1330 sub validate_project {
1331         my $input = shift || return undef;
1332         if (!validate_pathname($input) ||
1333                 !(-d "$projectroot/$input") ||
1334                 !check_export_ok("$projectroot/$input") ||
1335                 ($strict_export && !project_in_list($input))) {
1336                 return undef;
1337         } else {
1338                 return $input;
1339         }
1340 }
1341
1342 sub validate_pathname {
1343         my $input = shift || return undef;
1344
1345         # no '.' or '..' as elements of path, i.e. no '.' nor '..'
1346         # at the beginning, at the end, and between slashes.
1347         # also this catches doubled slashes
1348         if ($input =~ m!(^|/)(|\.|\.\.)(/|$)!) {
1349                 return undef;
1350         }
1351         # no null characters
1352         if ($input =~ m!\0!) {
1353                 return undef;
1354         }
1355         return $input;
1356 }
1357
1358 sub validate_refname {
1359         my $input = shift || return undef;
1360
1361         # textual hashes are O.K.
1362         if ($input =~ m/^[0-9a-fA-F]{40}$/) {
1363                 return $input;
1364         }
1365         # it must be correct pathname
1366         $input = validate_pathname($input)
1367                 or return undef;
1368         # restrictions on ref name according to git-check-ref-format
1369         if ($input =~ m!(/\.|\.\.|[\000-\040\177 ~^:?*\[]|/$)!) {
1370                 return undef;
1371         }
1372         return $input;
1373 }
1374
1375 # decode sequences of octets in utf8 into Perl's internal form,
1376 # which is utf-8 with utf8 flag set if needed.  gitweb writes out
1377 # in utf-8 thanks to "binmode STDOUT, ':utf8'" at beginning
1378 sub to_utf8 {
1379         my $str = shift;
1380         return undef unless defined $str;
1381         if (utf8::valid($str)) {
1382                 utf8::decode($str);
1383                 return $str;
1384         } else {
1385                 return decode($fallback_encoding, $str, Encode::FB_DEFAULT);
1386         }
1387 }
1388
1389 # quote unsafe chars, but keep the slash, even when it's not
1390 # correct, but quoted slashes look too horrible in bookmarks
1391 sub esc_param {
1392         my $str = shift;
1393         return undef unless defined $str;
1394         $str =~ s/([^A-Za-z0-9\-_.~()\/:@ ]+)/CGI::escape($1)/eg;
1395         $str =~ s/ /\+/g;
1396         return $str;
1397 }
1398
1399 # the quoting rules for path_info fragment are slightly different
1400 sub esc_path_info {
1401         my $str = shift;
1402         return undef unless defined $str;
1403
1404         # path_info doesn't treat '+' as space (specially), but '?' must be escaped
1405         $str =~ s/([^A-Za-z0-9\-_.~();\/;:@&= +]+)/CGI::escape($1)/eg;
1406
1407         return $str;
1408 }
1409
1410 # quote unsafe chars in whole URL, so some characters cannot be quoted
1411 sub esc_url {
1412         my $str = shift;
1413         return undef unless defined $str;
1414         $str =~ s/([^A-Za-z0-9\-_.~();\/;?:@&= ]+)/CGI::escape($1)/eg;
1415         $str =~ s/ /\+/g;
1416         return $str;
1417 }
1418
1419 # quote unsafe characters in HTML attributes
1420 sub esc_attr {
1421
1422         # for XHTML conformance escaping '"' to '&quot;' is not enough
1423         return esc_html(@_);
1424 }
1425
1426 # replace invalid utf8 character with SUBSTITUTION sequence
1427 sub esc_html {
1428         my $str = shift;
1429         my %opts = @_;
1430
1431         return undef unless defined $str;
1432
1433         $str = to_utf8($str);
1434         $str = $cgi->escapeHTML($str);
1435         if ($opts{'-nbsp'}) {
1436                 $str =~ s/ /&nbsp;/g;
1437         }
1438         $str =~ s|([[:cntrl:]])|(($1 ne "\t") ? quot_cec($1) : $1)|eg;
1439         return $str;
1440 }
1441
1442 # quote control characters and escape filename to HTML
1443 sub esc_path {
1444         my $str = shift;
1445         my %opts = @_;
1446
1447         return undef unless defined $str;
1448
1449         $str = to_utf8($str);
1450         $str = $cgi->escapeHTML($str);
1451         if ($opts{'-nbsp'}) {
1452                 $str =~ s/ /&nbsp;/g;
1453         }
1454         $str =~ s|([[:cntrl:]])|quot_cec($1)|eg;
1455         return $str;
1456 }
1457
1458 # Make control characters "printable", using character escape codes (CEC)
1459 sub quot_cec {
1460         my $cntrl = shift;
1461         my %opts = @_;
1462         my %es = ( # character escape codes, aka escape sequences
1463                 "\t" => '\t',   # tab            (HT)
1464                 "\n" => '\n',   # line feed      (LF)
1465                 "\r" => '\r',   # carrige return (CR)
1466                 "\f" => '\f',   # form feed      (FF)
1467                 "\b" => '\b',   # backspace      (BS)
1468                 "\a" => '\a',   # alarm (bell)   (BEL)
1469                 "\e" => '\e',   # escape         (ESC)
1470                 "\013" => '\v', # vertical tab   (VT)
1471                 "\000" => '\0', # nul character  (NUL)
1472         );
1473         my $chr = ( (exists $es{$cntrl})
1474                     ? $es{$cntrl}
1475                     : sprintf('\%2x', ord($cntrl)) );
1476         if ($opts{-nohtml}) {
1477                 return $chr;
1478         } else {
1479                 return "<span class=\"cntrl\">$chr</span>";
1480         }
1481 }
1482
1483 # Alternatively use unicode control pictures codepoints,
1484 # Unicode "printable representation" (PR)
1485 sub quot_upr {
1486         my $cntrl = shift;
1487         my %opts = @_;
1488
1489         my $chr = sprintf('&#%04d;', 0x2400+ord($cntrl));
1490         if ($opts{-nohtml}) {
1491                 return $chr;
1492         } else {
1493                 return "<span class=\"cntrl\">$chr</span>";
1494         }
1495 }
1496
1497 # git may return quoted and escaped filenames
1498 sub unquote {
1499         my $str = shift;
1500
1501         sub unq {
1502                 my $seq = shift;
1503                 my %es = ( # character escape codes, aka escape sequences
1504                         't' => "\t",   # tab            (HT, TAB)
1505                         'n' => "\n",   # newline        (NL)
1506                         'r' => "\r",   # return         (CR)
1507                         'f' => "\f",   # form feed      (FF)
1508                         'b' => "\b",   # backspace      (BS)
1509                         'a' => "\a",   # alarm (bell)   (BEL)
1510                         'e' => "\e",   # escape         (ESC)
1511                         'v' => "\013", # vertical tab   (VT)
1512                 );
1513
1514                 if ($seq =~ m/^[0-7]{1,3}$/) {
1515                         # octal char sequence
1516                         return chr(oct($seq));
1517                 } elsif (exists $es{$seq}) {
1518                         # C escape sequence, aka character escape code
1519                         return $es{$seq};
1520                 }
1521                 # quoted ordinary character
1522                 return $seq;
1523         }
1524
1525         if ($str =~ m/^"(.*)"$/) {
1526                 # needs unquoting
1527                 $str = $1;
1528                 $str =~ s/\\([^0-7]|[0-7]{1,3})/unq($1)/eg;
1529         }
1530         return $str;
1531 }
1532
1533 # escape tabs (convert tabs to spaces)
1534 sub untabify {
1535         my $line = shift;
1536
1537         while ((my $pos = index($line, "\t")) != -1) {
1538                 if (my $count = (8 - ($pos % 8))) {
1539                         my $spaces = ' ' x $count;
1540                         $line =~ s/\t/$spaces/;
1541                 }
1542         }
1543
1544         return $line;
1545 }
1546
1547 sub project_in_list {
1548         my $project = shift;
1549         my @list = git_get_projects_list();
1550         return @list && scalar(grep { $_->{'path'} eq $project } @list);
1551 }
1552
1553 ## ----------------------------------------------------------------------
1554 ## HTML aware string manipulation
1555
1556 # Try to chop given string on a word boundary between position
1557 # $len and $len+$add_len. If there is no word boundary there,
1558 # chop at $len+$add_len. Do not chop if chopped part plus ellipsis
1559 # (marking chopped part) would be longer than given string.
1560 sub chop_str {
1561         my $str = shift;
1562         my $len = shift;
1563         my $add_len = shift || 10;
1564         my $where = shift || 'right'; # 'left' | 'center' | 'right'
1565
1566         # Make sure perl knows it is utf8 encoded so we don't
1567         # cut in the middle of a utf8 multibyte char.
1568         $str = to_utf8($str);
1569
1570         # allow only $len chars, but don't cut a word if it would fit in $add_len
1571         # if it doesn't fit, cut it if it's still longer than the dots we would add
1572         # remove chopped character entities entirely
1573
1574         # when chopping in the middle, distribute $len into left and right part
1575         # return early if chopping wouldn't make string shorter
1576         if ($where eq 'center') {
1577                 return $str if ($len + 5 >= length($str)); # filler is length 5
1578                 $len = int($len/2);
1579         } else {
1580                 return $str if ($len + 4 >= length($str)); # filler is length 4
1581         }
1582
1583         # regexps: ending and beginning with word part up to $add_len
1584         my $endre = qr/.{$len}\w{0,$add_len}/;
1585         my $begre = qr/\w{0,$add_len}.{$len}/;
1586
1587         if ($where eq 'left') {
1588                 $str =~ m/^(.*?)($begre)$/;
1589                 my ($lead, $body) = ($1, $2);
1590                 if (length($lead) > 4) {
1591                         $lead = " ...";
1592                 }
1593                 return "$lead$body";
1594
1595         } elsif ($where eq 'center') {
1596                 $str =~ m/^($endre)(.*)$/;
1597                 my ($left, $str)  = ($1, $2);
1598                 $str =~ m/^(.*?)($begre)$/;
1599                 my ($mid, $right) = ($1, $2);
1600                 if (length($mid) > 5) {
1601                         $mid = " ... ";
1602                 }
1603                 return "$left$mid$right";
1604
1605         } else {
1606                 $str =~ m/^($endre)(.*)$/;
1607                 my $body = $1;
1608                 my $tail = $2;
1609                 if (length($tail) > 4) {
1610                         $tail = "... ";
1611                 }
1612                 return "$body$tail";
1613         }
1614 }
1615
1616 # takes the same arguments as chop_str, but also wraps a <span> around the
1617 # result with a title attribute if it does get chopped. Additionally, the
1618 # string is HTML-escaped.
1619 sub chop_and_escape_str {
1620         my ($str) = @_;
1621
1622         my $chopped = chop_str(@_);
1623         if ($chopped eq $str) {
1624                 return esc_html($chopped);
1625         } else {
1626                 $str =~ s/[[:cntrl:]]/?/g;
1627                 return $cgi->span({-title=>$str}, esc_html($chopped));
1628         }
1629 }
1630
1631 ## ----------------------------------------------------------------------
1632 ## functions returning short strings
1633
1634 # CSS class for given age value (in seconds)
1635 sub age_class {
1636         my $age = shift;
1637
1638         if (!defined $age) {
1639                 return "noage";
1640         } elsif ($age < 60*60*2) {
1641                 return "age0";
1642         } elsif ($age < 60*60*24*2) {
1643                 return "age1";
1644         } else {
1645                 return "age2";
1646         }
1647 }
1648
1649 # convert age in seconds to "nn units ago" string
1650 sub age_string {
1651         my $age = shift;
1652         my $age_str;
1653
1654         if ($age > 60*60*24*365*2) {
1655                 $age_str = (int $age/60/60/24/365);
1656                 $age_str .= " years ago";
1657         } elsif ($age > 60*60*24*(365/12)*2) {
1658                 $age_str = int $age/60/60/24/(365/12);
1659                 $age_str .= " months ago";
1660         } elsif ($age > 60*60*24*7*2) {
1661                 $age_str = int $age/60/60/24/7;
1662                 $age_str .= " weeks ago";
1663         } elsif ($age > 60*60*24*2) {
1664                 $age_str = int $age/60/60/24;
1665                 $age_str .= " days ago";
1666         } elsif ($age > 60*60*2) {
1667                 $age_str = int $age/60/60;
1668                 $age_str .= " hours ago";
1669         } elsif ($age > 60*2) {
1670                 $age_str = int $age/60;
1671                 $age_str .= " min ago";
1672         } elsif ($age > 2) {
1673                 $age_str = int $age;
1674                 $age_str .= " sec ago";
1675         } else {
1676                 $age_str .= " right now";
1677         }
1678         return $age_str;
1679 }
1680
1681 use constant {
1682         S_IFINVALID => 0030000,
1683         S_IFGITLINK => 0160000,
1684 };
1685
1686 # submodule/subproject, a commit object reference
1687 sub S_ISGITLINK {
1688         my $mode = shift;
1689
1690         return (($mode & S_IFMT) == S_IFGITLINK)
1691 }
1692
1693 # convert file mode in octal to symbolic file mode string
1694 sub mode_str {
1695         my $mode = oct shift;
1696
1697         if (S_ISGITLINK($mode)) {
1698                 return 'm---------';
1699         } elsif (S_ISDIR($mode & S_IFMT)) {
1700                 return 'drwxr-xr-x';
1701         } elsif (S_ISLNK($mode)) {
1702                 return 'lrwxrwxrwx';
1703         } elsif (S_ISREG($mode)) {
1704                 # git cares only about the executable bit
1705                 if ($mode & S_IXUSR) {
1706                         return '-rwxr-xr-x';
1707                 } else {
1708                         return '-rw-r--r--';
1709                 };
1710         } else {
1711                 return '----------';
1712         }
1713 }
1714
1715 # convert file mode in octal to file type string
1716 sub file_type {
1717         my $mode = shift;
1718
1719         if ($mode !~ m/^[0-7]+$/) {
1720                 return $mode;
1721         } else {
1722                 $mode = oct $mode;
1723         }
1724
1725         if (S_ISGITLINK($mode)) {
1726                 return "submodule";
1727         } elsif (S_ISDIR($mode & S_IFMT)) {
1728                 return "directory";
1729         } elsif (S_ISLNK($mode)) {
1730                 return "symlink";
1731         } elsif (S_ISREG($mode)) {
1732                 return "file";
1733         } else {
1734                 return "unknown";
1735         }
1736 }
1737
1738 # convert file mode in octal to file type description string
1739 sub file_type_long {
1740         my $mode = shift;
1741
1742         if ($mode !~ m/^[0-7]+$/) {
1743                 return $mode;
1744         } else {
1745                 $mode = oct $mode;
1746         }
1747
1748         if (S_ISGITLINK($mode)) {
1749                 return "submodule";
1750         } elsif (S_ISDIR($mode & S_IFMT)) {
1751                 return "directory";
1752         } elsif (S_ISLNK($mode)) {
1753                 return "symlink";
1754         } elsif (S_ISREG($mode)) {
1755                 if ($mode & S_IXUSR) {
1756                         return "executable";
1757                 } else {
1758                         return "file";
1759                 };
1760         } else {
1761                 return "unknown";
1762         }
1763 }
1764
1765
1766 ## ----------------------------------------------------------------------
1767 ## functions returning short HTML fragments, or transforming HTML fragments
1768 ## which don't belong to other sections
1769
1770 # format line of commit message.
1771 sub format_log_line_html {
1772         my $line = shift;
1773
1774         $line = esc_html($line, -nbsp=>1);
1775         $line =~ s{\b([0-9a-fA-F]{8,40})\b}{
1776                 $cgi->a({-href => href(action=>"object", hash=>$1),
1777                                         -class => "text"}, $1);
1778         }eg;
1779
1780         return $line;
1781 }
1782
1783 # format marker of refs pointing to given object
1784
1785 # the destination action is chosen based on object type and current context:
1786 # - for annotated tags, we choose the tag view unless it's the current view
1787 #   already, in which case we go to shortlog view
1788 # - for other refs, we keep the current view if we're in history, shortlog or
1789 #   log view, and select shortlog otherwise
1790 sub format_ref_marker {
1791         my ($refs, $id) = @_;
1792         my $markers = '';
1793
1794         if (defined $refs->{$id}) {
1795                 foreach my $ref (@{$refs->{$id}}) {
1796                         # this code exploits the fact that non-lightweight tags are the
1797                         # only indirect objects, and that they are the only objects for which
1798                         # we want to use tag instead of shortlog as action
1799                         my ($type, $name) = qw();
1800                         my $indirect = ($ref =~ s/\^\{\}$//);
1801                         # e.g. tags/v2.6.11 or heads/next
1802                         if ($ref =~ m!^(.*?)s?/(.*)$!) {
1803                                 $type = $1;
1804                                 $name = $2;
1805                         } else {
1806                                 $type = "ref";
1807                                 $name = $ref;
1808                         }
1809
1810                         my $class = $type;
1811                         $class .= " indirect" if $indirect;
1812
1813                         my $dest_action = "shortlog";
1814
1815                         if ($indirect) {
1816                                 $dest_action = "tag" unless $action eq "tag";
1817                         } elsif ($action =~ /^(history|(short)?log)$/) {
1818                                 $dest_action = $action;
1819                         }
1820
1821                         my $dest = "";
1822                         $dest .= "refs/" unless $ref =~ m!^refs/!;
1823                         $dest .= $ref;
1824
1825                         my $link = $cgi->a({
1826                                 -href => href(
1827                                         action=>$dest_action,
1828                                         hash=>$dest
1829                                 )}, $name);
1830
1831                         $markers .= " <span class=\"".esc_attr($class)."\" title=\"".esc_attr($ref)."\">" .
1832                                 $link . "</span>";
1833                 }
1834         }
1835
1836         if ($markers) {
1837                 return ' <span class="refs">'. $markers . '</span>';
1838         } else {
1839                 return "";
1840         }
1841 }
1842
1843 # format, perhaps shortened and with markers, title line
1844 sub format_subject_html {
1845         my ($long, $short, $href, $extra) = @_;
1846         $extra = '' unless defined($extra);
1847
1848         if (length($short) < length($long)) {
1849                 $long =~ s/[[:cntrl:]]/?/g;
1850                 return $cgi->a({-href => $href, -class => "list subject",
1851                                 -title => to_utf8($long)},
1852                        esc_html($short)) . $extra;
1853         } else {
1854                 return $cgi->a({-href => $href, -class => "list subject"},
1855                        esc_html($long)) . $extra;
1856         }
1857 }
1858
1859 # Rather than recomputing the url for an email multiple times, we cache it
1860 # after the first hit. This gives a visible benefit in views where the avatar
1861 # for the same email is used repeatedly (e.g. shortlog).
1862 # The cache is shared by all avatar engines (currently gravatar only), which
1863 # are free to use it as preferred. Since only one avatar engine is used for any
1864 # given page, there's no risk for cache conflicts.
1865 our %avatar_cache = ();
1866
1867 # Compute the picon url for a given email, by using the picon search service over at
1868 # http://www.cs.indiana.edu/picons/search.html
1869 sub picon_url {
1870         my $email = lc shift;
1871         if (!$avatar_cache{$email}) {
1872                 my ($user, $domain) = split('@', $email);
1873                 $avatar_cache{$email} =
1874                         "http://www.cs.indiana.edu/cgi-pub/kinzler/piconsearch.cgi/" .
1875                         "$domain/$user/" .
1876                         "users+domains+unknown/up/single";
1877         }
1878         return $avatar_cache{$email};
1879 }
1880
1881 # Compute the gravatar url for a given email, if it's not in the cache already.
1882 # Gravatar stores only the part of the URL before the size, since that's the
1883 # one computationally more expensive. This also allows reuse of the cache for
1884 # different sizes (for this particular engine).
1885 sub gravatar_url {
1886         my $email = lc shift;
1887         my $size = shift;
1888         $avatar_cache{$email} ||=
1889                 "http://www.gravatar.com/avatar/" .
1890                         Digest::MD5::md5_hex($email) . "?s=";
1891         return $avatar_cache{$email} . $size;
1892 }
1893
1894 # Insert an avatar for the given $email at the given $size if the feature
1895 # is enabled.
1896 sub git_get_avatar {
1897         my ($email, %opts) = @_;
1898         my $pre_white  = ($opts{-pad_before} ? "&nbsp;" : "");
1899         my $post_white = ($opts{-pad_after}  ? "&nbsp;" : "");
1900         $opts{-size} ||= 'default';
1901         my $size = $avatar_size{$opts{-size}} || $avatar_size{'default'};
1902         my $url = "";
1903         if ($git_avatar eq 'gravatar') {
1904                 $url = gravatar_url($email, $size);
1905         } elsif ($git_avatar eq 'picon') {
1906                 $url = picon_url($email);
1907         }
1908         # Other providers can be added by extending the if chain, defining $url
1909         # as needed. If no variant puts something in $url, we assume avatars
1910         # are completely disabled/unavailable.
1911         if ($url) {
1912                 return $pre_white .
1913                        "<img width=\"$size\" " .
1914                             "class=\"avatar\" " .
1915                             "src=\"".esc_url($url)."\" " .
1916                             "alt=\"\" " .
1917                        "/>" . $post_white;
1918         } else {
1919                 return "";
1920         }
1921 }
1922
1923 sub format_search_author {
1924         my ($author, $searchtype, $displaytext) = @_;
1925         my $have_search = gitweb_check_feature('search');
1926
1927         if ($have_search) {
1928                 my $performed = "";
1929                 if ($searchtype eq 'author') {
1930                         $performed = "authored";
1931                 } elsif ($searchtype eq 'committer') {
1932                         $performed = "committed";
1933                 }
1934
1935                 return $cgi->a({-href => href(action=>"search", hash=>$hash,
1936                                 searchtext=>$author,
1937                                 searchtype=>$searchtype), class=>"list",
1938                                 title=>"Search for commits $performed by $author"},
1939                                 $displaytext);
1940
1941         } else {
1942                 return $displaytext;
1943         }
1944 }
1945
1946 # format the author name of the given commit with the given tag
1947 # the author name is chopped and escaped according to the other
1948 # optional parameters (see chop_str).
1949 sub format_author_html {
1950         my $tag = shift;
1951         my $co = shift;
1952         my $author = chop_and_escape_str($co->{'author_name'}, @_);
1953         return "<$tag class=\"author\">" .
1954                format_search_author($co->{'author_name'}, "author",
1955                        git_get_avatar($co->{'author_email'}, -pad_after => 1) .
1956                        $author) .
1957                "</$tag>";
1958 }
1959
1960 # format git diff header line, i.e. "diff --(git|combined|cc) ..."
1961 sub format_git_diff_header_line {
1962         my $line = shift;
1963         my $diffinfo = shift;
1964         my ($from, $to) = @_;
1965
1966         if ($diffinfo->{'nparents'}) {
1967                 # combined diff
1968                 $line =~ s!^(diff (.*?) )"?.*$!$1!;
1969                 if ($to->{'href'}) {
1970                         $line .= $cgi->a({-href => $to->{'href'}, -class => "path"},
1971                                          esc_path($to->{'file'}));
1972                 } else { # file was deleted (no href)
1973                         $line .= esc_path($to->{'file'});
1974                 }
1975         } else {
1976                 # "ordinary" diff
1977                 $line =~ s!^(diff (.*?) )"?a/.*$!$1!;
1978                 if ($from->{'href'}) {
1979                         $line .= $cgi->a({-href => $from->{'href'}, -class => "path"},
1980                                          'a/' . esc_path($from->{'file'}));
1981                 } else { # file was added (no href)
1982                         $line .= 'a/' . esc_path($from->{'file'});
1983                 }
1984                 $line .= ' ';
1985                 if ($to->{'href'}) {
1986                         $line .= $cgi->a({-href => $to->{'href'}, -class => "path"},
1987                                          'b/' . esc_path($to->{'file'}));
1988                 } else { # file was deleted
1989                         $line .= 'b/' . esc_path($to->{'file'});
1990                 }
1991         }
1992
1993         return "<div class=\"diff header\">$line</div>\n";
1994 }
1995
1996 # format extended diff header line, before patch itself
1997 sub format_extended_diff_header_line {
1998         my $line = shift;
1999         my $diffinfo = shift;
2000         my ($from, $to) = @_;
2001
2002         # match <path>
2003         if ($line =~ s!^((copy|rename) from ).*$!$1! && $from->{'href'}) {
2004                 $line .= $cgi->a({-href=>$from->{'href'}, -class=>"path"},
2005                                        esc_path($from->{'file'}));
2006         }
2007         if ($line =~ s!^((copy|rename) to ).*$!$1! && $to->{'href'}) {
2008                 $line .= $cgi->a({-href=>$to->{'href'}, -class=>"path"},
2009                                  esc_path($to->{'file'}));
2010         }
2011         # match single <mode>
2012         if ($line =~ m/\s(\d{6})$/) {
2013                 $line .= '<span class="info"> (' .
2014                          file_type_long($1) .
2015                          ')</span>';
2016         }
2017         # match <hash>
2018         if ($line =~ m/^index [0-9a-fA-F]{40},[0-9a-fA-F]{40}/) {
2019                 # can match only for combined diff
2020                 $line = 'index ';
2021                 for (my $i = 0; $i < $diffinfo->{'nparents'}; $i++) {
2022                         if ($from->{'href'}[$i]) {
2023                                 $line .= $cgi->a({-href=>$from->{'href'}[$i],
2024                                                   -class=>"hash"},
2025                                                  substr($diffinfo->{'from_id'}[$i],0,7));
2026                         } else {
2027                                 $line .= '0' x 7;
2028                         }
2029                         # separator
2030                         $line .= ',' if ($i < $diffinfo->{'nparents'} - 1);
2031                 }
2032                 $line .= '..';
2033                 if ($to->{'href'}) {
2034                         $line .= $cgi->a({-href=>$to->{'href'}, -class=>"hash"},
2035                                          substr($diffinfo->{'to_id'},0,7));
2036                 } else {
2037                         $line .= '0' x 7;
2038                 }
2039
2040         } elsif ($line =~ m/^index [0-9a-fA-F]{40}..[0-9a-fA-F]{40}/) {
2041                 # can match only for ordinary diff
2042                 my ($from_link, $to_link);
2043                 if ($from->{'href'}) {
2044                         $from_link = $cgi->a({-href=>$from->{'href'}, -class=>"hash"},
2045                                              substr($diffinfo->{'from_id'},0,7));
2046                 } else {
2047                         $from_link = '0' x 7;
2048                 }
2049                 if ($to->{'href'}) {
2050                         $to_link = $cgi->a({-href=>$to->{'href'}, -class=>"hash"},
2051                                            substr($diffinfo->{'to_id'},0,7));
2052                 } else {
2053                         $to_link = '0' x 7;
2054                 }
2055                 my ($from_id, $to_id) = ($diffinfo->{'from_id'}, $diffinfo->{'to_id'});
2056                 $line =~ s!$from_id\.\.$to_id!$from_link..$to_link!;
2057         }
2058
2059         return $line . "<br/>\n";
2060 }
2061
2062 # format from-file/to-file diff header
2063 sub format_diff_from_to_header {
2064         my ($from_line, $to_line, $diffinfo, $from, $to, @parents) = @_;
2065         my $line;
2066         my $result = '';
2067
2068         $line = $from_line;
2069         #assert($line =~ m/^---/) if DEBUG;
2070         # no extra formatting for "^--- /dev/null"
2071         if (! $diffinfo->{'nparents'}) {
2072                 # ordinary (single parent) diff
2073                 if ($line =~ m!^--- "?a/!) {
2074                         if ($from->{'href'}) {
2075                                 $line = '--- a/' .
2076                                         $cgi->a({-href=>$from->{'href'}, -class=>"path"},
2077                                                 esc_path($from->{'file'}));
2078                         } else {
2079                                 $line = '--- a/' .
2080                                         esc_path($from->{'file'});
2081                         }
2082                 }
2083                 $result .= qq!<div class="diff from_file">$line</div>\n!;
2084
2085         } else {
2086                 # combined diff (merge commit)
2087                 for (my $i = 0; $i < $diffinfo->{'nparents'}; $i++) {
2088                         if ($from->{'href'}[$i]) {
2089                                 $line = '--- ' .
2090                                         $cgi->a({-href=>href(action=>"blobdiff",
2091                                                              hash_parent=>$diffinfo->{'from_id'}[$i],
2092                                                              hash_parent_base=>$parents[$i],
2093                                                              file_parent=>$from->{'file'}[$i],
2094                                                              hash=>$diffinfo->{'to_id'},
2095                                                              hash_base=>$hash,
2096                                                              file_name=>$to->{'file'}),
2097                                                  -class=>"path",
2098                                                  -title=>"diff" . ($i+1)},
2099                                                 $i+1) .
2100                                         '/' .
2101                                         $cgi->a({-href=>$from->{'href'}[$i], -class=>"path"},
2102                                                 esc_path($from->{'file'}[$i]));
2103                         } else {
2104                                 $line = '--- /dev/null';
2105                         }
2106                         $result .= qq!<div class="diff from_file">$line</div>\n!;
2107                 }
2108         }
2109
2110         $line = $to_line;
2111         #assert($line =~ m/^\+\+\+/) if DEBUG;
2112         # no extra formatting for "^+++ /dev/null"
2113         if ($line =~ m!^\+\+\+ "?b/!) {
2114                 if ($to->{'href'}) {
2115                         $line = '+++ b/' .
2116                                 $cgi->a({-href=>$to->{'href'}, -class=>"path"},
2117                                         esc_path($to->{'file'}));
2118                 } else {
2119                         $line = '+++ b/' .
2120                                 esc_path($to->{'file'});
2121                 }
2122         }
2123         $result .= qq!<div class="diff to_file">$line</div>\n!;
2124
2125         return $result;
2126 }
2127
2128 # create note for patch simplified by combined diff
2129 sub format_diff_cc_simplified {
2130         my ($diffinfo, @parents) = @_;
2131         my $result = '';
2132
2133         $result .= "<div class=\"diff header\">" .
2134                    "diff --cc ";
2135         if (!is_deleted($diffinfo)) {
2136                 $result .= $cgi->a({-href => href(action=>"blob",
2137                                                   hash_base=>$hash,
2138                                                   hash=>$diffinfo->{'to_id'},
2139                                                   file_name=>$diffinfo->{'to_file'}),
2140                                     -class => "path"},
2141                                    esc_path($diffinfo->{'to_file'}));
2142         } else {
2143                 $result .= esc_path($diffinfo->{'to_file'});
2144         }
2145         $result .= "</div>\n" . # class="diff header"
2146                    "<div class=\"diff nodifferences\">" .
2147                    "Simple merge" .
2148                    "</div>\n"; # class="diff nodifferences"
2149
2150         return $result;
2151 }
2152
2153 # format patch (diff) line (not to be used for diff headers)
2154 sub format_diff_line {
2155         my $line = shift;
2156         my ($from, $to) = @_;
2157         my $diff_class = "";
2158
2159         chomp $line;
2160
2161         if ($from && $to && ref($from->{'href'}) eq "ARRAY") {
2162                 # combined diff
2163                 my $prefix = substr($line, 0, scalar @{$from->{'href'}});
2164                 if ($line =~ m/^\@{3}/) {
2165                         $diff_class = " chunk_header";
2166                 } elsif ($line =~ m/^\\/) {
2167                         $diff_class = " incomplete";
2168                 } elsif ($prefix =~ tr/+/+/) {
2169                         $diff_class = " add";
2170                 } elsif ($prefix =~ tr/-/-/) {
2171                         $diff_class = " rem";
2172                 }
2173         } else {
2174                 # assume ordinary diff
2175                 my $char = substr($line, 0, 1);
2176                 if ($char eq '+') {
2177                         $diff_class = " add";
2178                 } elsif ($char eq '-') {
2179                         $diff_class = " rem";
2180                 } elsif ($char eq '@') {
2181                         $diff_class = " chunk_header";
2182                 } elsif ($char eq "\\") {
2183                         $diff_class = " incomplete";
2184                 }
2185         }
2186         $line = untabify($line);
2187         if ($from && $to && $line =~ m/^\@{2} /) {
2188                 my ($from_text, $from_start, $from_lines, $to_text, $to_start, $to_lines, $section) =
2189                         $line =~ m/^\@{2} (-(\d+)(?:,(\d+))?) (\+(\d+)(?:,(\d+))?) \@{2}(.*)$/;
2190
2191                 $from_lines = 0 unless defined $from_lines;
2192                 $to_lines   = 0 unless defined $to_lines;
2193
2194                 if ($from->{'href'}) {
2195                         $from_text = $cgi->a({-href=>"$from->{'href'}#l$from_start",
2196                                              -class=>"list"}, $from_text);
2197                 }
2198                 if ($to->{'href'}) {
2199                         $to_text   = $cgi->a({-href=>"$to->{'href'}#l$to_start",
2200                                              -class=>"list"}, $to_text);
2201                 }
2202                 $line = "<span class=\"chunk_info\">@@ $from_text $to_text @@</span>" .
2203                         "<span class=\"section\">" . esc_html($section, -nbsp=>1) . "</span>";
2204                 return "<div class=\"diff$diff_class\">$line</div>\n";
2205         } elsif ($from && $to && $line =~ m/^\@{3}/) {
2206                 my ($prefix, $ranges, $section) = $line =~ m/^(\@+) (.*?) \@+(.*)$/;
2207                 my (@from_text, @from_start, @from_nlines, $to_text, $to_start, $to_nlines);
2208
2209                 @from_text = split(' ', $ranges);
2210                 for (my $i = 0; $i < @from_text; ++$i) {
2211                         ($from_start[$i], $from_nlines[$i]) =
2212                                 (split(',', substr($from_text[$i], 1)), 0);
2213                 }
2214
2215                 $to_text   = pop @from_text;
2216                 $to_start  = pop @from_start;
2217                 $to_nlines = pop @from_nlines;
2218
2219                 $line = "<span class=\"chunk_info\">$prefix ";
2220                 for (my $i = 0; $i < @from_text; ++$i) {
2221                         if ($from->{'href'}[$i]) {
2222                                 $line .= $cgi->a({-href=>"$from->{'href'}[$i]#l$from_start[$i]",
2223                                                   -class=>"list"}, $from_text[$i]);
2224                         } else {
2225                                 $line .= $from_text[$i];
2226                         }
2227                         $line .= " ";
2228                 }
2229                 if ($to->{'href'}) {
2230                         $line .= $cgi->a({-href=>"$to->{'href'}#l$to_start",
2231                                           -class=>"list"}, $to_text);
2232                 } else {
2233                         $line .= $to_text;
2234                 }
2235                 $line .= " $prefix</span>" .
2236                          "<span class=\"section\">" . esc_html($section, -nbsp=>1) . "</span>";
2237                 return "<div class=\"diff$diff_class\">$line</div>\n";
2238         }
2239         return "<div class=\"diff$diff_class\">" . esc_html($line, -nbsp=>1) . "</div>\n";
2240 }
2241
2242 # Generates undef or something like "_snapshot_" or "snapshot (_tbz2_ _zip_)",
2243 # linked.  Pass the hash of the tree/commit to snapshot.
2244 sub format_snapshot_links {
2245         my ($hash) = @_;
2246         my $num_fmts = @snapshot_fmts;
2247         if ($num_fmts > 1) {
2248                 # A parenthesized list of links bearing format names.
2249                 # e.g. "snapshot (_tar.gz_ _zip_)"
2250                 return "snapshot (" . join(' ', map
2251                         $cgi->a({
2252                                 -href => href(
2253                                         action=>"snapshot",
2254                                         hash=>$hash,
2255                                         snapshot_format=>$_
2256                                 )
2257                         }, $known_snapshot_formats{$_}{'display'})
2258                 , @snapshot_fmts) . ")";
2259         } elsif ($num_fmts == 1) {
2260                 # A single "snapshot" link whose tooltip bears the format name.
2261                 # i.e. "_snapshot_"
2262                 my ($fmt) = @snapshot_fmts;
2263                 return
2264                         $cgi->a({
2265                                 -href => href(
2266                                         action=>"snapshot",
2267                                         hash=>$hash,
2268                                         snapshot_format=>$fmt
2269                                 ),
2270                                 -title => "in format: $known_snapshot_formats{$fmt}{'display'}"
2271                         }, "snapshot");
2272         } else { # $num_fmts == 0
2273                 return undef;
2274         }
2275 }
2276
2277 ## ......................................................................
2278 ## functions returning values to be passed, perhaps after some
2279 ## transformation, to other functions; e.g. returning arguments to href()
2280
2281 # returns hash to be passed to href to generate gitweb URL
2282 # in -title key it returns description of link
2283 sub get_feed_info {
2284         my $format = shift || 'Atom';
2285         my %res = (action => lc($format));
2286
2287         # feed links are possible only for project views
2288         return unless (defined $project);
2289         # some views should link to OPML, or to generic project feed,
2290         # or don't have specific feed yet (so they should use generic)
2291         return if ($action =~ /^(?:tags|heads|forks|tag|search)$/x);
2292
2293         my $branch;
2294         # branches refs uses 'refs/heads/' prefix (fullname) to differentiate
2295         # from tag links; this also makes possible to detect branch links
2296         if ((defined $hash_base && $hash_base =~ m!^refs/heads/(.*)$!) ||
2297             (defined $hash      && $hash      =~ m!^refs/heads/(.*)$!)) {
2298                 $branch = $1;
2299         }
2300         # find log type for feed description (title)
2301         my $type = 'log';
2302         if (defined $file_name) {
2303                 $type  = "history of $file_name";
2304                 $type .= "/" if ($action eq 'tree');
2305                 $type .= " on '$branch'" if (defined $branch);
2306         } else {
2307                 $type = "log of $branch" if (defined $branch);
2308         }
2309
2310         $res{-title} = $type;
2311         $res{'hash'} = (defined $branch ? "refs/heads/$branch" : undef);
2312         $res{'file_name'} = $file_name;
2313
2314         return %res;
2315 }
2316
2317 ## ----------------------------------------------------------------------
2318 ## git utility subroutines, invoking git commands
2319
2320 # returns path to the core git executable and the --git-dir parameter as list
2321 sub git_cmd {
2322         $number_of_git_cmds++;
2323         return $GIT, '--git-dir='.$git_dir;
2324 }
2325
2326 # quote the given arguments for passing them to the shell
2327 # quote_command("command", "arg 1", "arg with ' and ! characters")
2328 # => "'command' 'arg 1' 'arg with '\'' and '\!' characters'"
2329 # Try to avoid using this function wherever possible.
2330 sub quote_command {
2331         return join(' ',
2332                 map { my $a = $_; $a =~ s/(['!])/'\\$1'/g; "'$a'" } @_ );
2333 }
2334
2335 # get HEAD ref of given project as hash
2336 sub git_get_head_hash {
2337         return git_get_full_hash(shift, 'HEAD');
2338 }
2339
2340 sub git_get_full_hash {
2341         return git_get_hash(@_);
2342 }
2343
2344 sub git_get_short_hash {
2345         return git_get_hash(@_, '--short=7');
2346 }
2347
2348 sub git_get_hash {
2349         my ($project, $hash, @options) = @_;
2350         my $o_git_dir = $git_dir;
2351         my $retval = undef;
2352         $git_dir = "$projectroot/$project";
2353         if (open my $fd, '-|', git_cmd(), 'rev-parse',
2354             '--verify', '-q', @options, $hash) {
2355                 $retval = <$fd>;
2356                 chomp $retval if defined $retval;
2357                 close $fd;
2358         }
2359         if (defined $o_git_dir) {
2360                 $git_dir = $o_git_dir;
2361         }
2362         return $retval;
2363 }
2364
2365 # get type of given object
2366 sub git_get_type {
2367         my $hash = shift;
2368
2369         open my $fd, "-|", git_cmd(), "cat-file", '-t', $hash or return;
2370         my $type = <$fd>;
2371         close $fd or return;
2372         chomp $type;
2373         return $type;
2374 }
2375
2376 # repository configuration
2377 our $config_file = '';
2378 our %config;
2379
2380 # store multiple values for single key as anonymous array reference
2381 # single values stored directly in the hash, not as [ <value> ]
2382 sub hash_set_multi {
2383         my ($hash, $key, $value) = @_;
2384
2385         if (!exists $hash->{$key}) {
2386                 $hash->{$key} = $value;
2387         } elsif (!ref $hash->{$key}) {
2388                 $hash->{$key} = [ $hash->{$key}, $value ];
2389         } else {
2390                 push @{$hash->{$key}}, $value;
2391         }
2392 }
2393
2394 # return hash of git project configuration
2395 # optionally limited to some section, e.g. 'gitweb'
2396 sub git_parse_project_config {
2397         my $section_regexp = shift;
2398         my %config;
2399
2400         local $/ = "\0";
2401
2402         open my $fh, "-|", git_cmd(), "config", '-z', '-l',
2403                 or return;
2404
2405         while (my $keyval = <$fh>) {
2406                 chomp $keyval;
2407                 my ($key, $value) = split(/\n/, $keyval, 2);
2408
2409                 hash_set_multi(\%config, $key, $value)
2410                         if (!defined $section_regexp || $key =~ /^(?:$section_regexp)\./o);
2411         }
2412         close $fh;
2413
2414         return %config;
2415 }
2416
2417 # convert config value to boolean: 'true' or 'false'
2418 # no value, number > 0, 'true' and 'yes' values are true
2419 # rest of values are treated as false (never as error)
2420 sub config_to_bool {
2421         my $val = shift;
2422
2423         return 1 if !defined $val;             # section.key
2424
2425         # strip leading and trailing whitespace
2426         $val =~ s/^\s+//;
2427         $val =~ s/\s+$//;
2428
2429         return (($val =~ /^\d+$/ && $val) ||   # section.key = 1
2430                 ($val =~ /^(?:true|yes)$/i));  # section.key = true
2431 }
2432
2433 # convert config value to simple decimal number
2434 # an optional value suffix of 'k', 'm', or 'g' will cause the value
2435 # to be multiplied by 1024, 1048576, or 1073741824
2436 sub config_to_int {
2437         my $val = shift;
2438
2439         # strip leading and trailing whitespace
2440         $val =~ s/^\s+//;
2441         $val =~ s/\s+$//;
2442
2443         if (my ($num, $unit) = ($val =~ /^([0-9]*)([kmg])$/i)) {
2444                 $unit = lc($unit);
2445                 # unknown unit is treated as 1
2446                 return $num * ($unit eq 'g' ? 1073741824 :
2447                                $unit eq 'm' ?    1048576 :
2448                                $unit eq 'k' ?       1024 : 1);
2449         }
2450         return $val;
2451 }
2452
2453 # convert config value to array reference, if needed
2454 sub config_to_multi {
2455         my $val = shift;
2456
2457         return ref($val) ? $val : (defined($val) ? [ $val ] : []);
2458 }
2459
2460 sub git_get_project_config {
2461         my ($key, $type) = @_;
2462
2463         return unless defined $git_dir;
2464
2465         # key sanity check
2466         return unless ($key);
2467         $key =~ s/^gitweb\.//;
2468         return if ($key =~ m/\W/);
2469
2470         # type sanity check
2471         if (defined $type) {
2472                 $type =~ s/^--//;
2473                 $type = undef
2474                         unless ($type eq 'bool' || $type eq 'int');
2475         }
2476
2477         # get config
2478         if (!defined $config_file ||
2479             $config_file ne "$git_dir/config") {
2480                 %config = git_parse_project_config('gitweb');
2481                 $config_file = "$git_dir/config";
2482         }
2483
2484         # check if config variable (key) exists
2485         return unless exists $config{"gitweb.$key"};
2486
2487         # ensure given type
2488         if (!defined $type) {
2489                 return $config{"gitweb.$key"};
2490         } elsif ($type eq 'bool') {
2491                 # backward compatibility: 'git config --bool' returns true/false
2492                 return config_to_bool($config{"gitweb.$key"}) ? 'true' : 'false';
2493         } elsif ($type eq 'int') {
2494                 return config_to_int($config{"gitweb.$key"});
2495         }
2496         return $config{"gitweb.$key"};
2497 }
2498
2499 # get hash of given path at given ref
2500 sub git_get_hash_by_path {
2501         my $base = shift;
2502         my $path = shift || return undef;
2503         my $type = shift;
2504
2505         $path =~ s,/+$,,;
2506
2507         open my $fd, "-|", git_cmd(), "ls-tree", $base, "--", $path
2508                 or die_error(500, "Open git-ls-tree failed");
2509         my $line = <$fd>;
2510         close $fd or return undef;
2511
2512         if (!defined $line) {
2513                 # there is no tree or hash given by $path at $base
2514                 return undef;
2515         }
2516
2517         #'100644 blob 0fa3f3a66fb6a137f6ec2c19351ed4d807070ffa  panic.c'
2518         $line =~ m/^([0-9]+) (.+) ([0-9a-fA-F]{40})\t/;
2519         if (defined $type && $type ne $2) {
2520                 # type doesn't match
2521                 return undef;
2522         }
2523         return $3;
2524 }
2525
2526 # get path of entry with given hash at given tree-ish (ref)
2527 # used to get 'from' filename for combined diff (merge commit) for renames
2528 sub git_get_path_by_hash {
2529         my $base = shift || return;
2530         my $hash = shift || return;
2531
2532         local $/ = "\0";
2533
2534         open my $fd, "-|", git_cmd(), "ls-tree", '-r', '-t', '-z', $base
2535                 or return undef;
2536         while (my $line = <$fd>) {
2537                 chomp $line;
2538
2539                 #'040000 tree 595596a6a9117ddba9fe379b6b012b558bac8423  gitweb'
2540                 #'100644 blob e02e90f0429be0d2a69b76571101f20b8f75530f  gitweb/README'
2541                 if ($line =~ m/(?:[0-9]+) (?:.+) $hash\t(.+)$/) {
2542                         close $fd;
2543                         return $1;
2544                 }
2545         }
2546         close $fd;
2547         return undef;
2548 }
2549
2550 ## ......................................................................
2551 ## git utility functions, directly accessing git repository
2552
2553 sub git_get_project_description {
2554         my $path = shift;
2555
2556         $git_dir = "$projectroot/$path";
2557         open my $fd, '<', "$git_dir/description"
2558                 or return git_get_project_config('description');
2559         my $descr = <$fd>;
2560         close $fd;
2561         if (defined $descr) {
2562                 chomp $descr;
2563         }
2564         return $descr;
2565 }
2566
2567 sub git_get_project_ctags {
2568         my $path = shift;
2569         my $ctags = {};
2570
2571         $git_dir = "$projectroot/$path";
2572         opendir my $dh, "$git_dir/ctags"
2573                 or return $ctags;
2574         foreach (grep { -f $_ } map { "$git_dir/ctags/$_" } readdir($dh)) {
2575                 open my $ct, '<', $_ or next;
2576                 my $val = <$ct>;
2577                 chomp $val;
2578                 close $ct;
2579                 my $ctag = $_; $ctag =~ s#.*/##;
2580                 $ctags->{$ctag} = $val;
2581         }
2582         closedir $dh;
2583         $ctags;
2584 }
2585
2586 sub git_populate_project_tagcloud {
2587         my $ctags = shift;
2588
2589         # First, merge different-cased tags; tags vote on casing
2590         my %ctags_lc;
2591         foreach (keys %$ctags) {
2592                 $ctags_lc{lc $_}->{count} += $ctags->{$_};
2593                 if (not $ctags_lc{lc $_}->{topcount}
2594                     or $ctags_lc{lc $_}->{topcount} < $ctags->{$_}) {
2595                         $ctags_lc{lc $_}->{topcount} = $ctags->{$_};
2596                         $ctags_lc{lc $_}->{topname} = $_;
2597                 }
2598         }
2599
2600         my $cloud;
2601         if (eval { require HTML::TagCloud; 1; }) {
2602                 $cloud = HTML::TagCloud->new;
2603                 foreach (sort keys %ctags_lc) {
2604                         # Pad the title with spaces so that the cloud looks
2605                         # less crammed.
2606                         my $title = $ctags_lc{$_}->{topname};
2607                         $title =~ s/ /&nbsp;/g;
2608                         $title =~ s/^/&nbsp;/g;
2609                         $title =~ s/$/&nbsp;/g;
2610                         $cloud->add($title, $home_link."?by_tag=".$_, $ctags_lc{$_}->{count});
2611                 }
2612         } else {
2613                 $cloud = \%ctags_lc;
2614         }
2615         $cloud;
2616 }
2617
2618 sub git_show_project_tagcloud {
2619         my ($cloud, $count) = @_;
2620         print STDERR ref($cloud)."..\n";
2621         if (ref $cloud eq 'HTML::TagCloud') {
2622                 return $cloud->html_and_css($count);
2623         } else {
2624                 my @tags = sort { $cloud->{$a}->{count} <=> $cloud->{$b}->{count} } keys %$cloud;
2625                 return '<p align="center">' . join (', ', map {
2626                         $cgi->a({-href=>"$home_link?by_tag=$_"}, $cloud->{$_}->{topname})
2627                 } splice(@tags, 0, $count)) . '</p>';
2628         }
2629 }
2630
2631 sub git_get_project_url_list {
2632         my $path = shift;
2633
2634         $git_dir = "$projectroot/$path";
2635         open my $fd, '<', "$git_dir/cloneurl"
2636                 or return wantarray ?
2637                 @{ config_to_multi(git_get_project_config('url')) } :
2638                    config_to_multi(git_get_project_config('url'));
2639         my @git_project_url_list = map { chomp; $_ } <$fd>;
2640         close $fd;
2641
2642         return wantarray ? @git_project_url_list : \@git_project_url_list;
2643 }
2644
2645 sub git_get_projects_list {
2646         my ($filter) = @_;
2647         my @list;
2648
2649         $filter ||= '';
2650         $filter =~ s/\.git$//;
2651
2652         my $check_forks = gitweb_check_feature('forks');
2653
2654         if (-d $projects_list) {
2655                 # search in directory
2656                 my $dir = $projects_list . ($filter ? "/$filter" : '');
2657                 # remove the trailing "/"
2658                 $dir =~ s!/+$!!;
2659                 my $pfxlen = length("$dir");
2660                 my $pfxdepth = ($dir =~ tr!/!!);
2661
2662                 File::Find::find({
2663                         follow_fast => 1, # follow symbolic links
2664                         follow_skip => 2, # ignore duplicates
2665                         dangling_symlinks => 0, # ignore dangling symlinks, silently
2666                         wanted => sub {
2667                                 # global variables
2668                                 our $project_maxdepth;
2669                                 our $projectroot;
2670                                 # skip project-list toplevel, if we get it.
2671                                 return if (m!^[/.]$!);
2672                                 # only directories can be git repositories
2673                                 return unless (-d $_);
2674                                 # don't traverse too deep (Find is super slow on os x)
2675                                 if (($File::Find::name =~ tr!/!!) - $pfxdepth > $project_maxdepth) {
2676                                         $File::Find::prune = 1;
2677                                         return;
2678                                 }
2679
2680                                 my $subdir = substr($File::Find::name, $pfxlen + 1);
2681                                 # we check related file in $projectroot
2682                                 my $path = ($filter ? "$filter/" : '') . $subdir;
2683                                 if (check_export_ok("$projectroot/$path")) {
2684                                         push @list, { path => $path };
2685                                         $File::Find::prune = 1;
2686                                 }
2687                         },
2688                 }, "$dir");
2689
2690         } elsif (-f $projects_list) {
2691                 # read from file(url-encoded):
2692                 # 'git%2Fgit.git Linus+Torvalds'
2693                 # 'libs%2Fklibc%2Fklibc.git H.+Peter+Anvin'
2694                 # 'linux%2Fhotplug%2Fudev.git Greg+Kroah-Hartman'
2695                 my %paths;
2696                 open my $fd, '<', $projects_list or return;
2697         PROJECT:
2698                 while (my $line = <$fd>) {
2699                         chomp $line;
2700                         my ($path, $owner) = split ' ', $line;
2701                         $path = unescape($path);
2702                         $owner = unescape($owner);
2703                         if (!defined $path) {
2704                                 next;
2705                         }
2706                         if ($filter ne '') {
2707                                 # looking for forks;
2708                                 my $pfx = substr($path, 0, length($filter));
2709                                 if ($pfx ne $filter) {
2710                                         next PROJECT;
2711                                 }
2712                                 my $sfx = substr($path, length($filter));
2713                                 if ($sfx !~ /^\/.*\.git$/) {
2714                                         next PROJECT;
2715                                 }
2716                         } elsif ($check_forks) {
2717                         PATH:
2718                                 foreach my $filter (keys %paths) {
2719                                         # looking for forks;
2720                                         my $pfx = substr($path, 0, length($filter));
2721                                         if ($pfx ne $filter) {
2722                                                 next PATH;
2723                                         }
2724                                         my $sfx = substr($path, length($filter));
2725                                         if ($sfx !~ /^\/.*\.git$/) {
2726                                                 next PATH;
2727                                         }
2728                                         # is a fork, don't include it in
2729                                         # the list
2730                                         next PROJECT;
2731                                 }
2732                         }
2733                         if (check_export_ok("$projectroot/$path")) {
2734                                 my $pr = {
2735                                         path => $path,
2736                                         owner => to_utf8($owner),
2737                                 };
2738                                 push @list, $pr;
2739                                 (my $forks_path = $path) =~ s/\.git$//;
2740                                 $paths{$forks_path}++;
2741                         }
2742                 }
2743                 close $fd;
2744         }
2745         return @list;
2746 }
2747
2748 our $gitweb_project_owner = undef;
2749 sub git_get_project_list_from_file {
2750
2751         return if (defined $gitweb_project_owner);
2752
2753         $gitweb_project_owner = {};
2754         # read from file (url-encoded):
2755         # 'git%2Fgit.git Linus+Torvalds'
2756         # 'libs%2Fklibc%2Fklibc.git H.+Peter+Anvin'
2757         # 'linux%2Fhotplug%2Fudev.git Greg+Kroah-Hartman'
2758         if (-f $projects_list) {
2759                 open(my $fd, '<', $projects_list);
2760                 while (my $line = <$fd>) {
2761                         chomp $line;
2762                         my ($pr, $ow) = split ' ', $line;
2763                         $pr = unescape($pr);
2764                         $ow = unescape($ow);
2765                         $gitweb_project_owner->{$pr} = to_utf8($ow);
2766                 }
2767                 close $fd;
2768         }
2769 }
2770
2771 sub git_get_project_owner {
2772         my $project = shift;
2773         my $owner;
2774
2775         return undef unless $project;
2776         $git_dir = "$projectroot/$project";
2777
2778         if (!defined $gitweb_project_owner) {
2779                 git_get_project_list_from_file();
2780         }
2781
2782         if (exists $gitweb_project_owner->{$project}) {
2783                 $owner = $gitweb_project_owner->{$project};
2784         }
2785         if (!defined $owner){
2786                 $owner = git_get_project_config('owner');
2787         }
2788         if (!defined $owner) {
2789                 $owner = get_file_owner("$git_dir");
2790         }
2791
2792         return $owner;
2793 }
2794
2795 sub git_get_last_activity {
2796         my ($path) = @_;
2797         my $fd;
2798
2799         $git_dir = "$projectroot/$path";
2800         open($fd, "-|", git_cmd(), 'for-each-ref',
2801              '--format=%(committer)',
2802              '--sort=-committerdate',
2803              '--count=1',
2804              'refs/heads') or return;
2805         my $most_recent = <$fd>;
2806         close $fd or return;
2807         if (defined $most_recent &&
2808             $most_recent =~ / (\d+) [-+][01]\d\d\d$/) {
2809                 my $timestamp = $1;
2810                 my $age = time - $timestamp;
2811                 return ($age, age_string($age));
2812         }
2813         return (undef, undef);
2814 }
2815
2816 # Implementation note: when a single remote is wanted, we cannot use 'git
2817 # remote show -n' because that command always work (assuming it's a remote URL
2818 # if it's not defined), and we cannot use 'git remote show' because that would
2819 # try to make a network roundtrip. So the only way to find if that particular
2820 # remote is defined is to walk the list provided by 'git remote -v' and stop if
2821 # and when we find what we want.
2822 sub git_get_remotes_list {
2823         my $wanted = shift;
2824         my %remotes = ();
2825
2826         open my $fd, '-|' , git_cmd(), 'remote', '-v';
2827         return unless $fd;
2828         while (my $remote = <$fd>) {
2829                 chomp $remote;
2830                 $remote =~ s!\t(.*?)\s+\((\w+)\)$!!;
2831                 next if $wanted and not $remote eq $wanted;
2832                 my ($url, $key) = ($1, $2);
2833
2834                 $remotes{$remote} ||= { 'heads' => () };
2835                 $remotes{$remote}{$key} = $url;
2836         }
2837         close $fd or return;
2838         return wantarray ? %remotes : \%remotes;
2839 }
2840
2841 # Takes a hash of remotes as first parameter and fills it by adding the
2842 # available remote heads for each of the indicated remotes.
2843 sub fill_remote_heads {
2844         my $remotes = shift;
2845         my @heads = map { "remotes/$_" } keys %$remotes;
2846         my @remoteheads = git_get_heads_list(undef, @heads);
2847         foreach my $remote (keys %$remotes) {
2848                 $remotes->{$remote}{'heads'} = [ grep {
2849                         $_->{'name'} =~ s!^$remote/!!
2850                         } @remoteheads ];
2851         }
2852 }
2853
2854 sub git_get_references {
2855         my $type = shift || "";
2856         my %refs;
2857         # 5dc01c595e6c6ec9ccda4f6f69c131c0dd945f8c refs/tags/v2.6.11
2858         # c39ae07f393806ccf406ef966e9a15afc43cc36a refs/tags/v2.6.11^{}
2859         open my $fd, "-|", git_cmd(), "show-ref", "--dereference",
2860                 ($type ? ("--", "refs/$type") : ()) # use -- <pattern> if $type
2861                 or return;
2862
2863         while (my $line = <$fd>) {
2864                 chomp $line;
2865                 if ($line =~ m!^([0-9a-fA-F]{40})\srefs/($type.*)$!) {
2866                         if (defined $refs{$1}) {
2867                                 push @{$refs{$1}}, $2;
2868                         } else {
2869                                 $refs{$1} = [ $2 ];
2870                         }
2871                 }
2872         }
2873         close $fd or return;
2874         return \%refs;
2875 }
2876
2877 sub git_get_rev_name_tags {
2878         my $hash = shift || return undef;
2879
2880         open my $fd, "-|", git_cmd(), "name-rev", "--tags", $hash
2881                 or return;
2882         my $name_rev = <$fd>;
2883         close $fd;
2884
2885         if ($name_rev =~ m|^$hash tags/(.*)$|) {
2886                 return $1;
2887         } else {
2888                 # catches also '$hash undefined' output
2889                 return undef;
2890         }
2891 }
2892
2893 ## ----------------------------------------------------------------------
2894 ## parse to hash functions
2895
2896 sub parse_date {
2897         my $epoch = shift;
2898         my $tz = shift || "-0000";
2899
2900         my %date;
2901         my @months = ("Jan", "Feb", "Mar", "Apr", "May", "Jun", "Jul", "Aug", "Sep", "Oct", "Nov", "Dec");
2902         my @days = ("Sun", "Mon", "Tue", "Wed", "Thu", "Fri", "Sat");
2903         my ($sec, $min, $hour, $mday, $mon, $year, $wday, $yday) = gmtime($epoch);
2904         $date{'hour'} = $hour;
2905         $date{'minute'} = $min;
2906         $date{'mday'} = $mday;
2907         $date{'day'} = $days[$wday];
2908         $date{'month'} = $months[$mon];
2909         $date{'rfc2822'}   = sprintf "%s, %d %s %4d %02d:%02d:%02d +0000",
2910                              $days[$wday], $mday, $months[$mon], 1900+$year, $hour ,$min, $sec;
2911         $date{'mday-time'} = sprintf "%d %s %02d:%02d",
2912                              $mday, $months[$mon], $hour ,$min;
2913         $date{'iso-8601'}  = sprintf "%04d-%02d-%02dT%02d:%02d:%02dZ",
2914                              1900+$year, 1+$mon, $mday, $hour ,$min, $sec;
2915
2916         $tz =~ m/^([+\-][0-9][0-9])([0-9][0-9])$/;
2917         my $local = $epoch + ((int $1 + ($2/60)) * 3600);
2918         ($sec, $min, $hour, $mday, $mon, $year, $wday, $yday) = gmtime($local);
2919         $date{'hour_local'} = $hour;
2920         $date{'minute_local'} = $min;
2921         $date{'tz_local'} = $tz;
2922         $date{'iso-tz'} = sprintf("%04d-%02d-%02d %02d:%02d:%02d %s",
2923                                   1900+$year, $mon+1, $mday,
2924                                   $hour, $min, $sec, $tz);
2925         return %date;
2926 }
2927
2928 sub parse_tag {
2929         my $tag_id = shift;
2930         my %tag;
2931         my @comment;
2932
2933         open my $fd, "-|", git_cmd(), "cat-file", "tag", $tag_id or return;
2934         $tag{'id'} = $tag_id;
2935         while (my $line = <$fd>) {
2936                 chomp $line;
2937                 if ($line =~ m/^object ([0-9a-fA-F]{40})$/) {
2938                         $tag{'object'} = $1;
2939                 } elsif ($line =~ m/^type (.+)$/) {
2940                         $tag{'type'} = $1;
2941                 } elsif ($line =~ m/^tag (.+)$/) {
2942                         $tag{'name'} = $1;
2943                 } elsif ($line =~ m/^tagger (.*) ([0-9]+) (.*)$/) {
2944                         $tag{'author'} = $1;
2945                         $tag{'author_epoch'} = $2;
2946                         $tag{'author_tz'} = $3;
2947                         if ($tag{'author'} =~ m/^([^<]+) <([^>]*)>/) {
2948                                 $tag{'author_name'}  = $1;
2949                                 $tag{'author_email'} = $2;
2950                         } else {
2951                                 $tag{'author_name'} = $tag{'author'};
2952                         }
2953                 } elsif ($line =~ m/--BEGIN/) {
2954                         push @comment, $line;
2955                         last;
2956                 } elsif ($line eq "") {
2957                         last;
2958                 }
2959         }
2960         push @comment, <$fd>;
2961         $tag{'comment'} = \@comment;
2962         close $fd or return;
2963         if (!defined $tag{'name'}) {
2964                 return
2965         };
2966         return %tag
2967 }
2968
2969 sub parse_commit_text {
2970         my ($commit_text, $withparents) = @_;
2971         my @commit_lines = split '\n', $commit_text;
2972         my %co;
2973
2974         pop @commit_lines; # Remove '\0'
2975
2976         if (! @commit_lines) {
2977                 return;
2978         }
2979
2980         my $header = shift @commit_lines;
2981         if ($header !~ m/^[0-9a-fA-F]{40}/) {
2982                 return;
2983         }
2984         ($co{'id'}, my @parents) = split ' ', $header;
2985         while (my $line = shift @commit_lines) {
2986                 last if $line eq "\n";
2987                 if ($line =~ m/^tree ([0-9a-fA-F]{40})$/) {
2988                         $co{'tree'} = $1;
2989                 } elsif ((!defined $withparents) && ($line =~ m/^parent ([0-9a-fA-F]{40})$/)) {
2990                         push @parents, $1;
2991                 } elsif ($line =~ m/^author (.*) ([0-9]+) (.*)$/) {
2992                         $co{'author'} = to_utf8($1);
2993                         $co{'author_epoch'} = $2;
2994                         $co{'author_tz'} = $3;
2995                         if ($co{'author'} =~ m/^([^<]+) <([^>]*)>/) {
2996                                 $co{'author_name'}  = $1;
2997                                 $co{'author_email'} = $2;
2998                         } else {
2999                                 $co{'author_name'} = $co{'author'};
3000                         }
3001                 } elsif ($line =~ m/^committer (.*) ([0-9]+) (.*)$/) {
3002                         $co{'committer'} = to_utf8($1);
3003                         $co{'committer_epoch'} = $2;
3004                         $co{'committer_tz'} = $3;
3005                         if ($co{'committer'} =~ m/^([^<]+) <([^>]*)>/) {
3006                                 $co{'committer_name'}  = $1;
3007                                 $co{'committer_email'} = $2;
3008                         } else {
3009                                 $co{'committer_name'} = $co{'committer'};
3010                         }
3011                 }
3012         }
3013         if (!defined $co{'tree'}) {
3014                 return;
3015         };
3016         $co{'parents'} = \@parents;
3017         $co{'parent'} = $parents[0];
3018
3019         foreach my $title (@commit_lines) {
3020                 $title =~ s/^    //;
3021                 if ($title ne "") {
3022                         $co{'title'} = chop_str($title, 80, 5);
3023                         # remove leading stuff of merges to make the interesting part visible
3024                         if (length($title) > 50) {
3025                                 $title =~ s/^Automatic //;
3026                                 $title =~ s/^merge (of|with) /Merge ... /i;
3027                                 if (length($title) > 50) {
3028                                         $title =~ s/(http|rsync):\/\///;
3029                                 }
3030                                 if (length($title) > 50) {
3031                                         $title =~ s/(master|www|rsync)\.//;
3032                                 }
3033                                 if (length($title) > 50) {
3034                                         $title =~ s/kernel.org:?//;
3035                                 }
3036                                 if (length($title) > 50) {
3037                                         $title =~ s/\/pub\/scm//;
3038                                 }
3039                         }
3040                         $co{'title_short'} = chop_str($title, 50, 5);
3041                         last;
3042                 }
3043         }
3044         if (! defined $co{'title'} || $co{'title'} eq "") {
3045                 $co{'title'} = $co{'title_short'} = '(no commit message)';
3046         }
3047         # remove added spaces
3048         foreach my $line (@commit_lines) {
3049                 $line =~ s/^    //;
3050         }
3051         $co{'comment'} = \@commit_lines;
3052
3053         my $age = time - $co{'committer_epoch'};
3054         $co{'age'} = $age;
3055         $co{'age_string'} = age_string($age);
3056         my ($sec, $min, $hour, $mday, $mon, $year, $wday, $yday) = gmtime($co{'committer_epoch'});
3057         if ($age > 60*60*24*7*2) {
3058                 $co{'age_string_date'} = sprintf "%4i-%02u-%02i", 1900 + $year, $mon+1, $mday;
3059                 $co{'age_string_age'} = $co{'age_string'};
3060         } else {
3061                 $co{'age_string_date'} = $co{'age_string'};
3062                 $co{'age_string_age'} = sprintf "%4i-%02u-%02i", 1900 + $year, $mon+1, $mday;
3063         }
3064         return %co;
3065 }
3066
3067 sub parse_commit {
3068         my ($commit_id) = @_;
3069         my %co;
3070
3071         local $/ = "\0";
3072
3073         open my $fd, "-|", git_cmd(), "rev-list",
3074                 "--parents",
3075                 "--header",
3076                 "--max-count=1",
3077                 $commit_id,
3078                 "--",
3079                 or die_error(500, "Open git-rev-list failed");
3080         %co = parse_commit_text(<$fd>, 1);
3081         close $fd;
3082
3083         return %co;
3084 }
3085
3086 sub parse_commits {
3087         my ($commit_id, $maxcount, $skip, $filename, @args) = @_;
3088         my @cos;
3089
3090         $maxcount ||= 1;
3091         $skip ||= 0;
3092
3093         local $/ = "\0";
3094
3095         open my $fd, "-|", git_cmd(), "rev-list",
3096                 "--header",
3097                 @args,
3098                 ("--max-count=" . $maxcount),
3099                 ("--skip=" . $skip),
3100                 @extra_options,
3101                 $commit_id,
3102                 "--",
3103                 ($filename ? ($filename) : ())
3104                 or die_error(500, "Open git-rev-list failed");
3105         while (my $line = <$fd>) {
3106                 my %co = parse_commit_text($line);
3107                 push @cos, \%co;
3108         }
3109         close $fd;
3110
3111         return wantarray ? @cos : \@cos;
3112 }
3113
3114 # parse line of git-diff-tree "raw" output
3115 sub parse_difftree_raw_line {
3116         my $line = shift;
3117         my %res;
3118
3119         # ':100644 100644 03b218260e99b78c6df0ed378e59ed9205ccc96d 3b93d5e7cc7f7dd4ebed13a5cc1a4ad976fc94d8 M   ls-files.c'
3120         # ':100644 100644 7f9281985086971d3877aca27704f2aaf9c448ce bc190ebc71bbd923f2b728e505408f5e54bd073a M   rev-tree.c'
3121         if ($line =~ m/^:([0-7]{6}) ([0-7]{6}) ([0-9a-fA-F]{40}) ([0-9a-fA-F]{40}) (.)([0-9]{0,3})\t(.*)$/) {
3122                 $res{'from_mode'} = $1;
3123                 $res{'to_mode'} = $2;
3124                 $res{'from_id'} = $3;
3125                 $res{'to_id'} = $4;
3126                 $res{'status'} = $5;
3127                 $res{'similarity'} = $6;
3128                 if ($res{'status'} eq 'R' || $res{'status'} eq 'C') { # renamed or copied
3129                         ($res{'from_file'}, $res{'to_file'}) = map { unquote($_) } split("\t", $7);
3130                 } else {
3131                         $res{'from_file'} = $res{'to_file'} = $res{'file'} = unquote($7);
3132                 }
3133         }
3134         # '::100755 100755 100755 60e79ca1b01bc8b057abe17ddab484699a7f5fdb 94067cc5f73388f33722d52ae02f44692bc07490 94067cc5f73388f33722d52ae02f44692bc07490 MR git-gui/git-gui.sh'
3135         # combined diff (for merge commit)
3136         elsif ($line =~ s/^(::+)((?:[0-7]{6} )+)((?:[0-9a-fA-F]{40} )+)([a-zA-Z]+)\t(.*)$//) {
3137                 $res{'nparents'}  = length($1);
3138                 $res{'from_mode'} = [ split(' ', $2) ];
3139                 $res{'to_mode'} = pop @{$res{'from_mode'}};
3140                 $res{'from_id'} = [ split(' ', $3) ];
3141                 $res{'to_id'} = pop @{$res{'from_id'}};
3142                 $res{'status'} = [ split('', $4) ];
3143                 $res{'to_file'} = unquote($5);
3144         }
3145         # 'c512b523472485aef4fff9e57b229d9d243c967f'
3146         elsif ($line =~ m/^([0-9a-fA-F]{40})$/) {
3147                 $res{'commit'} = $1;
3148         }
3149
3150         return wantarray ? %res : \%res;
3151 }
3152
3153 # wrapper: return parsed line of git-diff-tree "raw" output
3154 # (the argument might be raw line, or parsed info)
3155 sub parsed_difftree_line {
3156         my $line_or_ref = shift;
3157
3158         if (ref($line_or_ref) eq "HASH") {
3159                 # pre-parsed (or generated by hand)
3160                 return $line_or_ref;
3161         } else {
3162                 return parse_difftree_raw_line($line_or_ref);
3163         }
3164 }
3165
3166 # parse line of git-ls-tree output
3167 sub parse_ls_tree_line {
3168         my $line = shift;
3169         my %opts = @_;
3170         my %res;
3171
3172         if ($opts{'-l'}) {
3173                 #'100644 blob 0fa3f3a66fb6a137f6ec2c19351ed4d807070ffa   16717  panic.c'
3174                 $line =~ m/^([0-9]+) (.+) ([0-9a-fA-F]{40}) +(-|[0-9]+)\t(.+)$/s;
3175
3176                 $res{'mode'} = $1;
3177                 $res{'type'} = $2;
3178                 $res{'hash'} = $3;
3179                 $res{'size'} = $4;
3180                 if ($opts{'-z'}) {
3181                         $res{'name'} = $5;
3182                 } else {
3183                         $res{'name'} = unquote($5);
3184                 }
3185         } else {
3186                 #'100644 blob 0fa3f3a66fb6a137f6ec2c19351ed4d807070ffa  panic.c'
3187                 $line =~ m/^([0-9]+) (.+) ([0-9a-fA-F]{40})\t(.+)$/s;
3188
3189                 $res{'mode'} = $1;
3190                 $res{'type'} = $2;
3191                 $res{'hash'} = $3;
3192                 if ($opts{'-z'}) {
3193                         $res{'name'} = $4;
3194                 } else {
3195                         $res{'name'} = unquote($4);
3196                 }
3197         }
3198
3199         return wantarray ? %res : \%res;
3200 }
3201
3202 # generates _two_ hashes, references to which are passed as 2 and 3 argument
3203 sub parse_from_to_diffinfo {
3204         my ($diffinfo, $from, $to, @parents) = @_;
3205
3206         if ($diffinfo->{'nparents'}) {
3207                 # combined diff
3208                 $from->{'file'} = [];
3209                 $from->{'href'} = [];
3210                 fill_from_file_info($diffinfo, @parents)
3211                         unless exists $diffinfo->{'from_file'};
3212                 for (my $i = 0; $i < $diffinfo->{'nparents'}; $i++) {
3213                         $from->{'file'}[$i] =
3214                                 defined $diffinfo->{'from_file'}[$i] ?
3215                                         $diffinfo->{'from_file'}[$i] :
3216                                         $diffinfo->{'to_file'};
3217                         if ($diffinfo->{'status'}[$i] ne "A") { # not new (added) file
3218                                 $from->{'href'}[$i] = href(action=>"blob",
3219                                                            hash_base=>$parents[$i],
3220                                                            hash=>$diffinfo->{'from_id'}[$i],
3221                                                            file_name=>$from->{'file'}[$i]);
3222                         } else {
3223                                 $from->{'href'}[$i] = undef;
3224                         }
3225                 }
3226         } else {
3227                 # ordinary (not combined) diff
3228                 $from->{'file'} = $diffinfo->{'from_file'};
3229                 if ($diffinfo->{'status'} ne "A") { # not new (added) file
3230                         $from->{'href'} = href(action=>"blob", hash_base=>$hash_parent,
3231                                                hash=>$diffinfo->{'from_id'},
3232                                                file_name=>$from->{'file'});
3233                 } else {
3234                         delete $from->{'href'};
3235                 }
3236         }
3237
3238         $to->{'file'} = $diffinfo->{'to_file'};
3239         if (!is_deleted($diffinfo)) { # file exists in result
3240                 $to->{'href'} = href(action=>"blob", hash_base=>$hash,
3241                                      hash=>$diffinfo->{'to_id'},
3242                                      file_name=>$to->{'file'});
3243         } else {
3244                 delete $to->{'href'};
3245         }
3246 }
3247
3248 ## ......................................................................
3249 ## parse to array of hashes functions
3250
3251 sub git_get_heads_list {
3252         my ($limit, @classes) = @_;
3253         @classes = ('heads') unless @classes;
3254         my @patterns = map { "refs/$_" } @classes;
3255         my @headslist;
3256
3257         open my $fd, '-|', git_cmd(), 'for-each-ref',
3258                 ($limit ? '--count='.($limit+1) : ()), '--sort=-committerdate',
3259                 '--format=%(objectname) %(refname) %(subject)%00%(committer)',
3260                 @patterns
3261                 or return;
3262         while (my $line = <$fd>) {
3263                 my %ref_item;
3264
3265                 chomp $line;
3266                 my ($refinfo, $committerinfo) = split(/\0/, $line);
3267                 my ($hash, $name, $title) = split(' ', $refinfo, 3);
3268                 my ($committer, $epoch, $tz) =
3269                         ($committerinfo =~ /^(.*) ([0-9]+) (.*)$/);
3270                 $ref_item{'fullname'}  = $name;
3271                 $name =~ s!^refs/(?:head|remote)s/!!;
3272
3273                 $ref_item{'name'}  = $name;
3274                 $ref_item{'id'}    = $hash;
3275                 $ref_item{'title'} = $title || '(no commit message)';
3276                 $ref_item{'epoch'} = $epoch;
3277                 if ($epoch) {
3278                         $ref_item{'age'} = age_string(time - $ref_item{'epoch'});
3279                 } else {
3280                         $ref_item{'age'} = "unknown";
3281                 }
3282
3283                 push @headslist, \%ref_item;
3284         }
3285         close $fd;
3286
3287         return wantarray ? @headslist : \@headslist;
3288 }
3289
3290 sub git_get_tags_list {
3291         my $limit = shift;
3292         my @tagslist;
3293
3294         open my $fd, '-|', git_cmd(), 'for-each-ref',
3295                 ($limit ? '--count='.($limit+1) : ()), '--sort=-creatordate',
3296                 '--format=%(objectname) %(objecttype) %(refname) '.
3297                 '%(*objectname) %(*objecttype) %(subject)%00%(creator)',
3298                 'refs/tags'
3299                 or return;
3300         while (my $line = <$fd>) {
3301                 my %ref_item;
3302
3303                 chomp $line;
3304                 my ($refinfo, $creatorinfo) = split(/\0/, $line);
3305                 my ($id, $type, $name, $refid, $reftype, $title) = split(' ', $refinfo, 6);
3306                 my ($creator, $epoch, $tz) =
3307                         ($creatorinfo =~ /^(.*) ([0-9]+) (.*)$/);
3308                 $ref_item{'fullname'} = $name;
3309                 $name =~ s!^refs/tags/!!;
3310
3311                 $ref_item{'type'} = $type;
3312                 $ref_item{'id'} = $id;
3313                 $ref_item{'name'} = $name;
3314                 if ($type eq "tag") {
3315                         $ref_item{'subject'} = $title;
3316                         $ref_item{'reftype'} = $reftype;
3317                         $ref_item{'refid'}   = $refid;
3318                 } else {
3319                         $ref_item{'reftype'} = $type;
3320                         $ref_item{'refid'}   = $id;
3321                 }
3322
3323                 if ($type eq "tag" || $type eq "commit") {
3324                         $ref_item{'epoch'} = $epoch;
3325                         if ($epoch) {
3326                                 $ref_item{'age'} = age_string(time - $ref_item{'epoch'});
3327                         } else {
3328                                 $ref_item{'age'} = "unknown";
3329                         }
3330                 }
3331
3332                 push @tagslist, \%ref_item;
3333         }
3334         close $fd;
3335
3336         return wantarray ? @tagslist : \@tagslist;
3337 }
3338
3339 ## ----------------------------------------------------------------------
3340 ## filesystem-related functions
3341
3342 sub get_file_owner {
3343         my $path = shift;
3344
3345         my ($dev, $ino, $mode, $nlink, $st_uid, $st_gid, $rdev, $size) = stat($path);
3346         my ($name, $passwd, $uid, $gid, $quota, $comment, $gcos, $dir, $shell) = getpwuid($st_uid);
3347         if (!defined $gcos) {
3348                 return undef;
3349         }
3350         my $owner = $gcos;
3351         $owner =~ s/[,;].*$//;
3352         return to_utf8($owner);
3353 }
3354
3355 # assume that file exists
3356 sub insert_file {
3357         my $filename = shift;
3358
3359         open my $fd, '<', $filename;
3360         print map { to_utf8($_) } <$fd>;
3361         close $fd;
3362 }
3363
3364 ## ......................................................................
3365 ## mimetype related functions
3366
3367 sub mimetype_guess_file {
3368         my $filename = shift;
3369         my $mimemap = shift;
3370         -r $mimemap or return undef;
3371
3372         my %mimemap;
3373         open(my $mh, '<', $mimemap) or return undef;
3374         while (<$mh>) {
3375                 next if m/^#/; # skip comments
3376                 my ($mimetype, $exts) = split(/\t+/);
3377                 if (defined $exts) {
3378                         my @exts = split(/\s+/, $exts);
3379                         foreach my $ext (@exts) {
3380                                 $mimemap{$ext} = $mimetype;
3381                         }
3382                 }
3383         }
3384         close($mh);
3385
3386         $filename =~ /\.([^.]*)$/;
3387         return $mimemap{$1};
3388 }
3389
3390 sub mimetype_guess {
3391         my $filename = shift;
3392         my $mime;
3393         $filename =~ /\./ or return undef;
3394
3395         if ($mimetypes_file) {
3396                 my $file = $mimetypes_file;
3397                 if ($file !~ m!^/!) { # if it is relative path
3398                         # it is relative to project
3399                         $file = "$projectroot/$project/$file";
3400                 }
3401                 $mime = mimetype_guess_file($filename, $file);
3402         }
3403         $mime ||= mimetype_guess_file($filename, '/etc/mime.types');
3404         return $mime;
3405 }
3406
3407 sub blob_mimetype {
3408         my $fd = shift;
3409         my $filename = shift;
3410
3411         if ($filename) {
3412                 my $mime = mimetype_guess($filename);
3413                 $mime and return $mime;
3414         }
3415
3416         # just in case
3417         return $default_blob_plain_mimetype unless $fd;
3418
3419         if (-T $fd) {
3420                 return 'text/plain';
3421         } elsif (! $filename) {
3422                 return 'application/octet-stream';
3423         } elsif ($filename =~ m/\.png$/i) {
3424                 return 'image/png';
3425         } elsif ($filename =~ m/\.gif$/i) {
3426                 return 'image/gif';
3427         } elsif ($filename =~ m/\.jpe?g$/i) {
3428                 return 'image/jpeg';
3429         } else {
3430                 return 'application/octet-stream';
3431         }
3432 }
3433
3434 sub blob_contenttype {
3435         my ($fd, $file_name, $type) = @_;
3436
3437         $type ||= blob_mimetype($fd, $file_name);
3438         if ($type eq 'text/plain' && defined $default_text_plain_charset) {
3439                 $type .= "; charset=$default_text_plain_charset";
3440         }
3441
3442         return $type;
3443 }
3444
3445 # guess file syntax for syntax highlighting; return undef if no highlighting
3446 # the name of syntax can (in the future) depend on syntax highlighter used
3447 sub guess_file_syntax {
3448         my ($highlight, $mimetype, $file_name) = @_;
3449         return undef unless ($highlight && defined $file_name);
3450         my $basename = basename($file_name, '.in');
3451         return $highlight_basename{$basename}
3452                 if exists $highlight_basename{$basename};
3453
3454         $basename =~ /\.([^.]*)$/;
3455         my $ext = $1 or return undef;
3456         return $highlight_ext{$ext}
3457                 if exists $highlight_ext{$ext};
3458
3459         return undef;
3460 }
3461
3462 # run highlighter and return FD of its output,
3463 # or return original FD if no highlighting
3464 sub run_highlighter {
3465         my ($fd, $highlight, $syntax) = @_;
3466         return $fd unless ($highlight && defined $syntax);
3467
3468         close $fd
3469                 or die_error(404, "Reading blob failed");
3470         open $fd, quote_command(git_cmd(), "cat-file", "blob", $hash)." | ".
3471                   quote_command($highlight_bin).
3472                   " --xhtml --fragment --syntax $syntax |"
3473                 or die_error(500, "Couldn't open file or run syntax highlighter");
3474         return $fd;
3475 }
3476
3477 ## ======================================================================
3478 ## functions printing HTML: header, footer, error page
3479
3480 sub get_page_title {
3481         my $title = to_utf8($site_name);
3482
3483         return $title unless (defined $project);
3484         $title .= " - " . to_utf8($project);
3485
3486         return $title unless (defined $action);
3487         $title .= "/$action"; # $action is US-ASCII (7bit ASCII)
3488
3489         return $title unless (defined $file_name);
3490         $title .= " - " . esc_path($file_name);
3491         if ($action eq "tree" && $file_name !~ m|/$|) {
3492                 $title .= "/";
3493         }
3494
3495         return $title;
3496 }
3497
3498 sub print_feed_meta {
3499         if (defined $project) {
3500                 my %href_params = get_feed_info();
3501                 if (!exists $href_params{'-title'}) {
3502                         $href_params{'-title'} = 'log';
3503                 }
3504
3505                 foreach my $format qw(RSS Atom) {
3506                         my $type = lc($format);
3507                         my %link_attr = (
3508                                 '-rel' => 'alternate',
3509                                 '-title' => esc_attr("$project - $href_params{'-title'} - $format feed"),
3510                                 '-type' => "application/$type+xml"
3511                         );
3512
3513                         $href_params{'action'} = $type;
3514                         $link_attr{'-href'} = href(%href_params);
3515                         print "<link ".
3516                               "rel=\"$link_attr{'-rel'}\" ".
3517                               "title=\"$link_attr{'-title'}\" ".
3518                               "href=\"$link_attr{'-href'}\" ".
3519                               "type=\"$link_attr{'-type'}\" ".
3520                               "/>\n";
3521
3522                         $href_params{'extra_options'} = '--no-merges';
3523                         $link_attr{'-href'} = href(%href_params);
3524                         $link_attr{'-title'} .= ' (no merges)';
3525                         print "<link ".
3526                               "rel=\"$link_attr{'-rel'}\" ".
3527                               "title=\"$link_attr{'-title'}\" ".
3528                               "href=\"$link_attr{'-href'}\" ".
3529                               "type=\"$link_attr{'-type'}\" ".
3530                               "/>\n";
3531                 }
3532
3533         } else {
3534                 printf('<link rel="alternate" title="%s projects list" '.
3535                        'href="%s" type="text/plain; charset=utf-8" />'."\n",
3536                        esc_attr($site_name), href(project=>undef, action=>"project_index"));
3537                 printf('<link rel="alternate" title="%s projects feeds" '.
3538                        'href="%s" type="text/x-opml" />'."\n",
3539                        esc_attr($site_name), href(project=>undef, action=>"opml"));
3540         }
3541 }
3542
3543 sub git_header_html {
3544         my $status = shift || "200 OK";
3545         my $expires = shift;
3546         my %opts = @_;
3547
3548         my $title = get_page_title();
3549         my $content_type;
3550         # require explicit support from the UA if we are to send the page as
3551         # 'application/xhtml+xml', otherwise send it as plain old 'text/html'.
3552         # we have to do this because MSIE sometimes globs '*/*', pretending to
3553         # support xhtml+xml but choking when it gets what it asked for.
3554         if (defined $cgi->http('HTTP_ACCEPT') &&
3555             $cgi->http('HTTP_ACCEPT') =~ m/(,|;|\s|^)application\/xhtml\+xml(,|;|\s|$)/ &&
3556             $cgi->Accept('application/xhtml+xml') != 0) {
3557                 $content_type = 'application/xhtml+xml';
3558         } else {
3559                 $content_type = 'text/html';
3560         }
3561         print $cgi->header(-type=>$content_type, -charset => 'utf-8',
3562                            -status=> $status, -expires => $expires)
3563                 unless ($opts{'-no_http_header'});
3564         my $mod_perl_version = $ENV{'MOD_PERL'} ? " $ENV{'MOD_PERL'}" : '';
3565         print <<EOF;
3566 <?xml version="1.0" encoding="utf-8"?>
3567 <!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Strict//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-strict.dtd">
3568 <html xmlns="http://www.w3.org/1999/xhtml" xml:lang="en-US" lang="en-US">
3569 <!-- git web interface version $version, (C) 2005-2006, Kay Sievers <kay.sievers\@vrfy.org>, Christian Gierke -->
3570 <!-- git core binaries version $git_version -->
3571 <head>
3572 <meta http-equiv="content-type" content="$content_type; charset=utf-8"/>
3573 <meta name="generator" content="gitweb/$version git/$git_version$mod_perl_version"/>
3574 <meta name="robots" content="index, nofollow"/>
3575 <title>$title</title>
3576 EOF
3577         # the stylesheet, favicon etc urls won't work correctly with path_info
3578         # unless we set the appropriate base URL
3579         if ($ENV{'PATH_INFO'}) {
3580                 print "<base href=\"".esc_url($base_url)."\" />\n";
3581         }
3582         # print out each stylesheet that exist, providing backwards capability
3583         # for those people who defined $stylesheet in a config file
3584         if (defined $stylesheet) {
3585                 print '<link rel="stylesheet" type="text/css" href="'.esc_url($stylesheet).'"/>'."\n";
3586         } else {
3587                 foreach my $stylesheet (@stylesheets) {
3588                         next unless $stylesheet;
3589                         print '<link rel="stylesheet" type="text/css" href="'.esc_url($stylesheet).'"/>'."\n";
3590                 }
3591         }
3592         print_feed_meta()
3593                 if ($status eq '200 OK');
3594         if (defined $favicon) {
3595                 print qq(<link rel="shortcut icon" href=").esc_url($favicon).qq(" type="image/png" />\n);
3596         }
3597
3598         print "</head>\n" .
3599               "<body>\n";
3600
3601         if (defined $site_header && -f $site_header) {
3602                 insert_file($site_header);
3603         }
3604
3605         print "<div class=\"page_header\">\n" .
3606               $cgi->a({-href => esc_url($logo_url),
3607                        -title => $logo_label},
3608                       qq(<img src=").esc_url($logo).qq(" width="72" height="27" alt="git" class="logo"/>));
3609         print $cgi->a({-href => esc_url($home_link)}, $home_link_str) . " / ";
3610         if (defined $project) {
3611                 print $cgi->a({-href => href(action=>"summary")}, esc_html($project));
3612                 if (defined $action) {
3613                         my $action_print = $action ;
3614                         if (defined $opts{-action_extra}) {
3615                                 $action_print = $cgi->a({-href => href(action=>$action)},
3616                                         $action);
3617                         }
3618                         print " / $action_print";
3619                 }
3620                 if (defined $opts{-action_extra}) {
3621                         print " / $opts{-action_extra}";
3622                 }
3623                 print "\n";
3624         }
3625         print "</div>\n";
3626
3627         my $have_search = gitweb_check_feature('search');
3628         if (defined $project && $have_search) {
3629                 if (!defined $searchtext) {
3630                         $searchtext = "";
3631                 }
3632                 my $search_hash;
3633                 if (defined $hash_base) {
3634                         $search_hash = $hash_base;
3635                 } elsif (defined $hash) {
3636                         $search_hash = $hash;
3637                 } else {
3638                         $search_hash = "HEAD";
3639                 }
3640                 my $action = $my_uri;
3641                 my $use_pathinfo = gitweb_check_feature('pathinfo');
3642                 if ($use_pathinfo) {
3643                         $action .= "/".esc_url($project);
3644                 }
3645                 print $cgi->startform(-method => "get", -action => $action) .
3646                       "<div class=\"search\">\n" .
3647                       (!$use_pathinfo &&
3648                       $cgi->input({-name=>"p", -value=>$project, -type=>"hidden"}) . "\n") .
3649                       $cgi->input({-name=>"a", -value=>"search", -type=>"hidden"}) . "\n" .
3650                       $cgi->input({-name=>"h", -value=>$search_hash, -type=>"hidden"}) . "\n" .
3651                       $cgi->popup_menu(-name => 'st', -default => 'commit',
3652                                        -values => ['commit', 'grep', 'author', 'committer', 'pickaxe']) .
3653                       $cgi->sup($cgi->a({-href => href(action=>"search_help")}, "?")) .
3654                       " search:\n",
3655                       $cgi->textfield(-name => "s", -value => $searchtext) . "\n" .
3656                       "<span title=\"Extended regular expression\">" .
3657                       $cgi->checkbox(-name => 'sr', -value => 1, -label => 're',
3658                                      -checked => $search_use_regexp) .
3659                       "</span>" .
3660                       "</div>" .
3661                       $cgi->end_form() . "\n";
3662         }
3663 }
3664
3665 sub git_footer_html {
3666         my $feed_class = 'rss_logo';
3667
3668         print "<div class=\"page_footer\">\n";
3669         if (defined $project) {
3670                 my $descr = git_get_project_description($project);
3671                 if (defined $descr) {
3672                         print "<div class=\"page_footer_text\">" . esc_html($descr) . "</div>\n";
3673                 }
3674
3675                 my %href_params = get_feed_info();
3676                 if (!%href_params) {
3677                         $feed_class .= ' generic';
3678                 }
3679                 $href_params{'-title'} ||= 'log';
3680
3681                 foreach my $format qw(RSS Atom) {
3682                         $href_params{'action'} = lc($format);
3683                         print $cgi->a({-href => href(%href_params),
3684                                       -title => "$href_params{'-title'} $format feed",
3685                                       -class => $feed_class}, $format)."\n";
3686                 }
3687
3688         } else {
3689                 print $cgi->a({-href => href(project=>undef, action=>"opml"),
3690                               -class => $feed_class}, "OPML") . " ";
3691                 print $cgi->a({-href => href(project=>undef, action=>"project_index"),
3692                               -class => $feed_class}, "TXT") . "\n";
3693         }
3694         print "</div>\n"; # class="page_footer"
3695
3696         if (defined $t0 && gitweb_check_feature('timed')) {
3697                 print "<div id=\"generating_info\">\n";
3698                 print 'This page took '.
3699                       '<span id="generating_time" class="time_span">'.
3700                       tv_interval($t0, [ gettimeofday() ]).
3701                       ' seconds </span>'.
3702                       ' and '.
3703                       '<span id="generating_cmd">'.
3704                       $number_of_git_cmds.
3705                       '</span> git commands '.
3706                       " to generate.\n";
3707                 print "</div>\n"; # class="page_footer"
3708         }
3709
3710         if (defined $site_footer && -f $site_footer) {
3711                 insert_file($site_footer);
3712         }
3713
3714         print qq!<script type="text/javascript" src="!.esc_url($javascript).qq!"></script>\n!;
3715         if (defined $action &&
3716             $action eq 'blame_incremental') {
3717                 print qq!<script type="text/javascript">\n!.
3718                       qq!startBlame("!. href(action=>"blame_data", -replay=>1) .qq!",\n!.
3719                       qq!           "!. href() .qq!");\n!.
3720                       qq!</script>\n!;
3721         } elsif (gitweb_check_feature('javascript-actions')) {
3722                 print qq!<script type="text/javascript">\n!.
3723                       qq!window.onload = fixLinks;\n!.
3724                       qq!</script>\n!;
3725         }
3726
3727         print "</body>\n" .
3728               "</html>";
3729 }
3730
3731 # die_error(<http_status_code>, <error_message>[, <detailed_html_description>])
3732 # Example: die_error(404, 'Hash not found')
3733 # By convention, use the following status codes (as defined in RFC 2616):
3734 # 400: Invalid or missing CGI parameters, or
3735 #      requested object exists but has wrong type.
3736 # 403: Requested feature (like "pickaxe" or "snapshot") not enabled on
3737 #      this server or project.
3738 # 404: Requested object/revision/project doesn't exist.
3739 # 500: The server isn't configured properly, or
3740 #      an internal error occurred (e.g. failed assertions caused by bugs), or
3741 #      an unknown error occurred (e.g. the git binary died unexpectedly).
3742 # 503: The server is currently unavailable (because it is overloaded,
3743 #      or down for maintenance).  Generally, this is a temporary state.
3744 sub die_error {
3745         my $status = shift || 500;
3746         my $error = esc_html(shift) || "Internal Server Error";
3747         my $extra = shift;
3748         my %opts = @_;
3749
3750         my %http_responses = (
3751                 400 => '400 Bad Request',
3752                 403 => '403 Forbidden',
3753                 404 => '404 Not Found',
3754                 500 => '500 Internal Server Error',
3755                 503 => '503 Service Unavailable',
3756         );
3757         git_header_html($http_responses{$status}, undef, %opts);
3758         print <<EOF;
3759 <div class="page_body">
3760 <br /><br />
3761 $status - $error
3762 <br />
3763 EOF
3764         if (defined $extra) {
3765                 print "<hr />\n" .
3766                       "$extra\n";
3767         }
3768         print "</div>\n";
3769
3770         git_footer_html();
3771         goto DONE_GITWEB
3772                 unless ($opts{'-error_handler'});
3773 }
3774
3775 ## ----------------------------------------------------------------------
3776 ## functions printing or outputting HTML: navigation
3777
3778 sub git_print_page_nav {
3779         my ($current, $suppress, $head, $treehead, $treebase, $extra) = @_;
3780         $extra = '' if !defined $extra; # pager or formats
3781
3782         my @navs = qw(summary shortlog log commit commitdiff tree);
3783         if ($suppress) {
3784                 @navs = grep { $_ ne $suppress } @navs;
3785         }
3786
3787         my %arg = map { $_ => {action=>$_} } @navs;
3788         if (defined $head) {
3789                 for (qw(commit commitdiff)) {
3790                         $arg{$_}{'hash'} = $head;
3791                 }
3792                 if ($current =~ m/^(tree | log | shortlog | commit | commitdiff | search)$/x) {
3793                         for (qw(shortlog log)) {
3794                                 $arg{$_}{'hash'} = $head;
3795                         }
3796                 }
3797         }
3798
3799         $arg{'tree'}{'hash'} = $treehead if defined $treehead;
3800         $arg{'tree'}{'hash_base'} = $treebase if defined $treebase;
3801
3802         my @actions = gitweb_get_feature('actions');
3803         my %repl = (
3804                 '%' => '%',
3805                 'n' => $project,         # project name
3806                 'f' => $git_dir,         # project path within filesystem
3807                 'h' => $treehead || '',  # current hash ('h' parameter)
3808                 'b' => $treebase || '',  # hash base ('hb' parameter)
3809         );
3810         while (@actions) {
3811                 my ($label, $link, $pos) = splice(@actions,0,3);
3812                 # insert
3813                 @navs = map { $_ eq $pos ? ($_, $label) : $_ } @navs;
3814                 # munch munch
3815                 $link =~ s/%([%nfhb])/$repl{$1}/g;
3816                 $arg{$label}{'_href'} = $link;
3817         }
3818
3819         print "<div class=\"page_nav\">\n" .
3820                 (join " | ",
3821                  map { $_ eq $current ?
3822                        $_ : $cgi->a({-href => ($arg{$_}{_href} ? $arg{$_}{_href} : href(%{$arg{$_}}))}, "$_")
3823                  } @navs);
3824         print "<br/>\n$extra<br/>\n" .
3825               "</div>\n";
3826 }
3827
3828 # returns a submenu for the nagivation of the refs views (tags, heads,
3829 # remotes) with the current view disabled and the remotes view only
3830 # available if the feature is enabled
3831 sub format_ref_views {
3832         my ($current) = @_;
3833         my @ref_views = qw{tags heads};
3834         push @ref_views, 'remotes' if gitweb_check_feature('remote_heads');
3835         return join " | ", map {
3836                 $_ eq $current ? $_ :
3837                 $cgi->a({-href => href(action=>$_)}, $_)
3838         } @ref_views
3839 }
3840
3841 sub format_paging_nav {
3842         my ($action, $page, $has_next_link) = @_;
3843         my $paging_nav;
3844
3845
3846         if ($page > 0) {
3847                 $paging_nav .=
3848                         $cgi->a({-href => href(-replay=>1, page=>undef)}, "first") .
3849                         " &sdot; " .
3850                         $cgi->a({-href => href(-replay=>1, page=>$page-1),
3851                                  -accesskey => "p", -title => "Alt-p"}, "prev");
3852         } else {
3853                 $paging_nav .= "first &sdot; prev";
3854         }
3855
3856         if ($has_next_link) {
3857                 $paging_nav .= " &sdot; " .
3858                         $cgi->a({-href => href(-replay=>1, page=>$page+1),
3859                                  -accesskey => "n", -title => "Alt-n"}, "next");
3860         } else {
3861                 $paging_nav .= " &sdot; next";
3862         }
3863
3864         return $paging_nav;
3865 }
3866
3867 ## ......................................................................
3868 ## functions printing or outputting HTML: div
3869
3870 sub git_print_header_div {
3871         my ($action, $title, $hash, $hash_base) = @_;
3872         my %args = ();
3873
3874         $args{'action'} = $action;
3875         $args{'hash'} = $hash if $hash;
3876         $args{'hash_base'} = $hash_base if $hash_base;
3877
3878         print "<div class=\"header\">\n" .
3879               $cgi->a({-href => href(%args), -class => "title"},
3880               $title ? $title : $action) .
3881               "\n</div>\n";
3882 }
3883
3884 sub format_repo_url {
3885         my ($name, $url) = @_;
3886         return "<tr class=\"metadata_url\"><td>$name</td><td>$url</td></tr>\n";
3887 }
3888
3889 # Group output by placing it in a DIV element and adding a header.
3890 # Options for start_div() can be provided by passing a hash reference as the
3891 # first parameter to the function.
3892 # Options to git_print_header_div() can be provided by passing an array
3893 # reference. This must follow the options to start_div if they are present.
3894 # The content can be a scalar, which is output as-is, a scalar reference, which
3895 # is output after html escaping, an IO handle passed either as *handle or
3896 # *handle{IO}, or a function reference. In the latter case all following
3897 # parameters will be taken as argument to the content function call.
3898 sub git_print_section {
3899         my ($div_args, $header_args, $content);
3900         my $arg = shift;
3901         if (ref($arg) eq 'HASH') {
3902                 $div_args = $arg;
3903                 $arg = shift;
3904         }
3905         if (ref($arg) eq 'ARRAY') {
3906                 $header_args = $arg;
3907                 $arg = shift;
3908         }
3909         $content = $arg;
3910
3911         print $cgi->start_div($div_args);
3912         git_print_header_div(@$header_args);
3913
3914         if (ref($content) eq 'CODE') {
3915                 $content->(@_);
3916         } elsif (ref($content) eq 'SCALAR') {
3917                 print esc_html($$content);
3918         } elsif (ref($content) eq 'GLOB' or ref($content) eq 'IO::Handle') {
3919                 print <$content>;
3920         } elsif (!ref($content) && defined($content)) {
3921                 print $content;
3922         }
3923
3924         print $cgi->end_div;
3925 }
3926
3927 sub print_local_time {
3928         print format_local_time(@_);
3929 }
3930
3931 sub format_local_time {
3932         my $localtime = '';
3933         my %date = @_;
3934         if ($date{'hour_local'} < 6) {
3935                 $localtime .= sprintf(" (<span class=\"atnight\">%02d:%02d</span> %s)",
3936                         $date{'hour_local'}, $date{'minute_local'}, $date{'tz_local'});
3937         } else {
3938                 $localtime .= sprintf(" (%02d:%02d %s)",
3939                         $date{'hour_local'}, $date{'minute_local'}, $date{'tz_local'});
3940         }
3941
3942         return $localtime;
3943 }
3944
3945 # Outputs the author name and date in long form
3946 sub git_print_authorship {
3947         my $co = shift;
3948         my %opts = @_;
3949         my $tag = $opts{-tag} || 'div';
3950         my $author = $co->{'author_name'};
3951
3952         my %ad = parse_date($co->{'author_epoch'}, $co->{'author_tz'});
3953         print "<$tag class=\"author_date\">" .
3954               format_search_author($author, "author", esc_html($author)) .
3955               " [$ad{'rfc2822'}";
3956         print_local_time(%ad) if ($opts{-localtime});
3957         print "]" . git_get_avatar($co->{'author_email'}, -pad_before => 1)
3958                   . "</$tag>\n";
3959 }
3960
3961 # Outputs table rows containing the full author or committer information,
3962 # in the format expected for 'commit' view (& similar).
3963 # Parameters are a commit hash reference, followed by the list of people
3964 # to output information for. If the list is empty it defaults to both
3965 # author and committer.
3966 sub git_print_authorship_rows {
3967         my $co = shift;
3968         # too bad we can't use @people = @_ || ('author', 'committer')
3969         my @people = @_;
3970         @people = ('author', 'committer') unless @people;
3971         foreach my $who (@people) {
3972                 my %wd = parse_date($co->{"${who}_epoch"}, $co->{"${who}_tz"});
3973                 print "<tr><td>$who</td><td>" .
3974                       format_search_author($co->{"${who}_name"}, $who,
3975                                esc_html($co->{"${who}_name"})) . " " .
3976                       format_search_author($co->{"${who}_email"}, $who,
3977                                esc_html("<" . $co->{"${who}_email"} . ">")) .
3978                       "</td><td rowspan=\"2\">" .
3979                       git_get_avatar($co->{"${who}_email"}, -size => 'double') .
3980                       "</td></tr>\n" .
3981                       "<tr>" .
3982                       "<td></td><td> $wd{'rfc2822'}";
3983                 print_local_time(%wd);
3984                 print "</td>" .
3985                       "</tr>\n";
3986         }
3987 }
3988
3989 sub git_print_page_path {
3990         my $name = shift;
3991         my $type = shift;
3992         my $hb = shift;
3993
3994
3995         print "<div class=\"page_path\">";
3996         print $cgi->a({-href => href(action=>"tree", hash_base=>$hb),
3997                       -title => 'tree root'}, to_utf8("[$project]"));
3998         print " / ";
3999         if (defined $name) {
4000                 my @dirname = split '/', $name;
4001                 my $basename = pop @dirname;
4002                 my $fullname = '';
4003
4004                 foreach my $dir (@dirname) {
4005                         $fullname .= ($fullname ? '/' : '') . $dir;
4006                         print $cgi->a({-href => href(action=>"tree", file_name=>$fullname,
4007                                                      hash_base=>$hb),
4008                                       -title => $fullname}, esc_path($dir));
4009                         print " / ";
4010                 }
4011                 if (defined $type && $type eq 'blob') {
4012                         print $cgi->a({-href => href(action=>"blob_plain", file_name=>$file_name,
4013                                                      hash_base=>$hb),
4014                                       -title => $name}, esc_path($basename));
4015                 } elsif (defined $type && $type eq 'tree') {
4016                         print $cgi->a({-href => href(action=>"tree", file_name=>$file_name,
4017                                                      hash_base=>$hb),
4018                                       -title => $name}, esc_path($basename));
4019                         print " / ";
4020                 } else {
4021                         print esc_path($basename);
4022                 }
4023         }
4024         print "<br/></div>\n";
4025 }
4026
4027 sub git_print_log {
4028         my $log = shift;
4029         my %opts = @_;
4030
4031         if ($opts{'-remove_title'}) {
4032                 # remove title, i.e. first line of log
4033                 shift @$log;
4034         }
4035         # remove leading empty lines
4036         while (defined $log->[0] && $log->[0] eq "") {
4037                 shift @$log;
4038         }
4039
4040         # print log
4041         my $signoff = 0;
4042         my $empty = 0;
4043         foreach my $line (@$log) {
4044                 if ($line =~ m/^ *(signed[ \-]off[ \-]by[ :]|acked[ \-]by[ :]|cc[ :])/i) {
4045                         $signoff = 1;
4046                         $empty = 0;
4047                         if (! $opts{'-remove_signoff'}) {
4048                                 print "<span class=\"signoff\">" . esc_html($line) . "</span><br/>\n";
4049                                 next;
4050                         } else {
4051                                 # remove signoff lines
4052                                 next;
4053                         }
4054                 } else {
4055                         $signoff = 0;
4056                 }
4057
4058                 # print only one empty line
4059                 # do not print empty line after signoff
4060                 if ($line eq "") {
4061                         next if ($empty || $signoff);
4062                         $empty = 1;
4063                 } else {
4064                         $empty = 0;
4065                 }
4066
4067                 print format_log_line_html($line) . "<br/>\n";
4068         }
4069
4070         if ($opts{'-final_empty_line'}) {
4071                 # end with single empty line
4072                 print "<br/>\n" unless $empty;
4073         }
4074 }
4075
4076 # return link target (what link points to)
4077 sub git_get_link_target {
4078         my $hash = shift;
4079         my $link_target;
4080
4081         # read link
4082         open my $fd, "-|", git_cmd(), "cat-file", "blob", $hash
4083                 or return;
4084         {
4085                 local $/ = undef;
4086                 $link_target = <$fd>;
4087         }
4088         close $fd
4089                 or return;
4090
4091         return $link_target;
4092 }
4093
4094 # given link target, and the directory (basedir) the link is in,
4095 # return target of link relative to top directory (top tree);
4096 # return undef if it is not possible (including absolute links).
4097 sub normalize_link_target {
4098         my ($link_target, $basedir) = @_;
4099
4100         # absolute symlinks (beginning with '/') cannot be normalized
4101         return if (substr($link_target, 0, 1) eq '/');
4102
4103         # normalize link target to path from top (root) tree (dir)
4104         my $path;
4105         if ($basedir) {
4106                 $path = $basedir . '/' . $link_target;
4107         } else {
4108                 # we are in top (root) tree (dir)
4109                 $path = $link_target;
4110         }
4111
4112         # remove //, /./, and /../
4113         my @path_parts;
4114         foreach my $part (split('/', $path)) {
4115                 # discard '.' and ''
4116                 next if (!$part || $part eq '.');
4117                 # handle '..'
4118                 if ($part eq '..') {
4119                         if (@path_parts) {
4120                                 pop @path_parts;
4121                         } else {
4122                                 # link leads outside repository (outside top dir)
4123                                 return;
4124                         }
4125                 } else {
4126                         push @path_parts, $part;
4127                 }
4128         }
4129         $path = join('/', @path_parts);
4130
4131         return $path;
4132 }
4133
4134 # print tree entry (row of git_tree), but without encompassing <tr> element
4135 sub git_print_tree_entry {
4136         my ($t, $basedir, $hash_base, $have_blame) = @_;
4137
4138         my %base_key = ();
4139         $base_key{'hash_base'} = $hash_base if defined $hash_base;
4140
4141         # The format of a table row is: mode list link.  Where mode is
4142         # the mode of the entry, list is the name of the entry, an href,
4143         # and link is the action links of the entry.
4144
4145         print "<td class=\"mode\">" . mode_str($t->{'mode'}) . "</td>\n";
4146         if (exists $t->{'size'}) {
4147                 print "<td class=\"size\">$t->{'size'}</td>\n";
4148         }
4149         if ($t->{'type'} eq "blob") {
4150                 print "<td class=\"list\">" .
4151                         $cgi->a({-href => href(action=>"blob", hash=>$t->{'hash'},
4152                                                file_name=>"$basedir$t->{'name'}", %base_key),
4153                                 -class => "list"}, esc_path($t->{'name'}));
4154                 if (S_ISLNK(oct $t->{'mode'})) {
4155                         my $link_target = git_get_link_target($t->{'hash'});
4156                         if ($link_target) {
4157                                 my $norm_target = normalize_link_target($link_target, $basedir);
4158                                 if (defined $norm_target) {
4159                                         print " -> " .
4160                                               $cgi->a({-href => href(action=>"object", hash_base=>$hash_base,
4161                                                                      file_name=>$norm_target),
4162                                                        -title => $norm_target}, esc_path($link_target));
4163                                 } else {
4164                                         print " -> " . esc_path($link_target);
4165                                 }
4166                         }
4167                 }
4168                 print "</td>\n";
4169                 print "<td class=\"link\">";
4170                 print $cgi->a({-href => href(action=>"blob", hash=>$t->{'hash'},
4171                                              file_name=>"$basedir$t->{'name'}", %base_key)},
4172                               "blob");
4173                 if ($have_blame) {
4174                         print " | " .
4175                               $cgi->a({-href => href(action=>"blame", hash=>$t->{'hash'},
4176                                                      file_name=>"$basedir$t->{'name'}", %base_key)},
4177                                       "blame");
4178                 }
4179                 if (defined $hash_base) {
4180                         print " | " .
4181                               $cgi->a({-href => href(action=>"history", hash_base=>$hash_base,
4182                                                      hash=>$t->{'hash'}, file_name=>"$basedir$t->{'name'}")},
4183                                       "history");
4184                 }
4185                 print " | " .
4186                         $cgi->a({-href => href(action=>"blob_plain", hash_base=>$hash_base,
4187                                                file_name=>"$basedir$t->{'name'}")},
4188                                 "raw");
4189                 print "</td>\n";
4190
4191         } elsif ($t->{'type'} eq "tree") {
4192                 print "<td class=\"list\">";
4193                 print $cgi->a({-href => href(action=>"tree", hash=>$t->{'hash'},
4194                                              file_name=>"$basedir$t->{'name'}",
4195                                              %base_key)},
4196                               esc_path($t->{'name'}));
4197                 print "</td>\n";
4198                 print "<td class=\"link\">";
4199                 print $cgi->a({-href => href(action=>"tree", hash=>$t->{'hash'},
4200                                              file_name=>"$basedir$t->{'name'}",
4201                                              %base_key)},
4202                               "tree");
4203                 if (defined $hash_base) {
4204                         print " | " .
4205                               $cgi->a({-href => href(action=>"history", hash_base=>$hash_base,
4206                                                      file_name=>"$basedir$t->{'name'}")},
4207                                       "history");
4208                 }
4209                 print "</td>\n";
4210         } else {
4211                 # unknown object: we can only present history for it
4212                 # (this includes 'commit' object, i.e. submodule support)
4213                 print "<td class=\"list\">" .
4214                       esc_path($t->{'name'}) .
4215                       "</td>\n";
4216                 print "<td class=\"link\">";
4217                 if (defined $hash_base) {
4218                         print $cgi->a({-href => href(action=>"history",
4219                                                      hash_base=>$hash_base,
4220                                                      file_name=>"$basedir$t->{'name'}")},
4221                                       "history");
4222                 }
4223                 print "</td>\n";
4224         }
4225 }
4226
4227 ## ......................................................................
4228 ## functions printing large fragments of HTML
4229
4230 # get pre-image filenames for merge (combined) diff
4231 sub fill_from_file_info {
4232         my ($diff, @parents) = @_;
4233
4234         $diff->{'from_file'} = [ ];
4235         $diff->{'from_file'}[$diff->{'nparents'} - 1] = undef;
4236         for (my $i = 0; $i < $diff->{'nparents'}; $i++) {
4237                 if ($diff->{'status'}[$i] eq 'R' ||
4238                     $diff->{'status'}[$i] eq 'C') {
4239                         $diff->{'from_file'}[$i] =
4240                                 git_get_path_by_hash($parents[$i], $diff->{'from_id'}[$i]);
4241                 }
4242         }
4243
4244         return $diff;
4245 }
4246
4247 # is current raw difftree line of file deletion
4248 sub is_deleted {
4249         my $diffinfo = shift;
4250
4251         return $diffinfo->{'to_id'} eq ('0' x 40);
4252 }
4253
4254 # does patch correspond to [previous] difftree raw line
4255 # $diffinfo  - hashref of parsed raw diff format
4256 # $patchinfo - hashref of parsed patch diff format
4257 #              (the same keys as in $diffinfo)
4258 sub is_patch_split {
4259         my ($diffinfo, $patchinfo) = @_;
4260
4261         return defined $diffinfo && defined $patchinfo
4262                 && $diffinfo->{'to_file'} eq $patchinfo->{'to_file'};
4263 }
4264
4265
4266 sub git_difftree_body {
4267         my ($difftree, $hash, @parents) = @_;
4268         my ($parent) = $parents[0];
4269         my $have_blame = gitweb_check_feature('blame');
4270         print "<div class=\"list_head\">\n";
4271         if ($#{$difftree} > 10) {
4272                 print(($#{$difftree} + 1) . " files changed:\n");
4273         }
4274         print "</div>\n";
4275
4276         print "<table class=\"" .
4277               (@parents > 1 ? "combined " : "") .
4278               "diff_tree\">\n";
4279
4280         # header only for combined diff in 'commitdiff' view
4281         my $has_header = @$difftree && @parents > 1 && $action eq 'commitdiff';
4282         if ($has_header) {
4283                 # table header
4284                 print "<thead><tr>\n" .
4285                        "<th></th><th></th>\n"; # filename, patchN link
4286                 for (my $i = 0; $i < @parents; $i++) {
4287                         my $par = $parents[$i];
4288                         print "<th>" .
4289                               $cgi->a({-href => href(action=>"commitdiff",
4290                                                      hash=>$hash, hash_parent=>$par),
4291                                        -title => 'commitdiff to parent number ' .
4292                                                   ($i+1) . ': ' . substr($par,0,7)},
4293                                       $i+1) .
4294                               "&nbsp;</th>\n";
4295                 }
4296                 print "</tr></thead>\n<tbody>\n";
4297         }
4298
4299         my $alternate = 1;
4300         my $patchno = 0;
4301         foreach my $line (@{$difftree}) {
4302                 my $diff = parsed_difftree_line($line);
4303
4304                 if ($alternate) {
4305                         print "<tr class=\"dark\">\n";
4306                 } else {
4307                         print "<tr class=\"light\">\n";
4308                 }
4309                 $alternate ^= 1;
4310
4311                 if (exists $diff->{'nparents'}) { # combined diff
4312
4313                         fill_from_file_info($diff, @parents)
4314                                 unless exists $diff->{'from_file'};
4315
4316                         if (!is_deleted($diff)) {
4317                                 # file exists in the result (child) commit
4318                                 print "<td>" .
4319                                       $cgi->a({-href => href(action=>"blob", hash=>$diff->{'to_id'},
4320                                                              file_name=>$diff->{'to_file'},
4321                                                              hash_base=>$hash),
4322                                               -class => "list"}, esc_path($diff->{'to_file'})) .
4323                                       "</td>\n";
4324                         } else {
4325                                 print "<td>" .
4326                                       esc_path($diff->{'to_file'}) .
4327                                       "</td>\n";
4328                         }
4329
4330                         if ($action eq 'commitdiff') {
4331                                 # link to patch
4332                                 $patchno++;
4333                                 print "<td class=\"link\">" .
4334                                       $cgi->a({-href => "#patch$patchno"}, "patch") .
4335                                       " | " .
4336                                       "</td>\n";
4337                         }
4338
4339                         my $has_history = 0;
4340                         my $not_deleted = 0;
4341                         for (my $i = 0; $i < $diff->{'nparents'}; $i++) {
4342                                 my $hash_parent = $parents[$i];
4343                                 my $from_hash = $diff->{'from_id'}[$i];
4344                                 my $from_path = $diff->{'from_file'}[$i];
4345                                 my $status = $diff->{'status'}[$i];
4346
4347                                 $has_history ||= ($status ne 'A');
4348                                 $not_deleted ||= ($status ne 'D');
4349
4350                                 if ($status eq 'A') {
4351                                         print "<td  class=\"link\" align=\"right\"> | </td>\n";
4352                                 } elsif ($status eq 'D') {
4353                                         print "<td class=\"link\">" .
4354                                               $cgi->a({-href => href(action=>"blob",
4355                                                                      hash_base=>$hash,
4356                                                                      hash=>$from_hash,
4357                                                                      file_name=>$from_path)},
4358                                                       "blob" . ($i+1)) .
4359                                               " | </td>\n";
4360                                 } else {
4361                                         if ($diff->{'to_id'} eq $from_hash) {
4362                                                 print "<td class=\"link nochange\">";
4363                                         } else {
4364                                                 print "<td class=\"link\">";
4365                                         }
4366                                         print $cgi->a({-href => href(action=>"blobdiff",
4367                                                                      hash=>$diff->{'to_id'},
4368                                                                      hash_parent=>$from_hash,
4369                                                                      hash_base=>$hash,
4370                                                                      hash_parent_base=>$hash_parent,
4371                                                                      file_name=>$diff->{'to_file'},
4372                                                                      file_parent=>$from_path)},
4373                                                       "diff" . ($i+1)) .
4374                                               " | </td>\n";
4375                                 }
4376                         }
4377
4378                         print "<td class=\"link\">";
4379                         if ($not_deleted) {
4380                                 print $cgi->a({-href => href(action=>"blob",
4381                                                              hash=>$diff->{'to_id'},
4382                                                              file_name=>$diff->{'to_file'},
4383                                                              hash_base=>$hash)},
4384                                               "blob");
4385                                 print " | " if ($has_history);
4386                         }
4387                         if ($has_history) {
4388                                 print $cgi->a({-href => href(action=>"history",
4389                                                              file_name=>$diff->{'to_file'},
4390                                                              hash_base=>$hash)},
4391                                               "history");
4392                         }
4393                         print "</td>\n";
4394
4395                         print "</tr>\n";
4396                         next; # instead of 'else' clause, to avoid extra indent
4397                 }
4398                 # else ordinary diff
4399
4400                 my ($to_mode_oct, $to_mode_str, $to_file_type);
4401                 my ($from_mode_oct, $from_mode_str, $from_file_type);
4402                 if ($diff->{'to_mode'} ne ('0' x 6)) {
4403                         $to_mode_oct = oct $diff->{'to_mode'};
4404                         if (S_ISREG($to_mode_oct)) { # only for regular file
4405                                 $to_mode_str = sprintf("%04o", $to_mode_oct & 0777); # permission bits
4406                         }
4407                         $to_file_type = file_type($diff->{'to_mode'});
4408                 }
4409                 if ($diff->{'from_mode'} ne ('0' x 6)) {
4410                         $from_mode_oct = oct $diff->{'from_mode'};
4411                         if (S_ISREG($to_mode_oct)) { # only for regular file
4412                                 $from_mode_str = sprintf("%04o", $from_mode_oct & 0777); # permission bits
4413                         }
4414                         $from_file_type = file_type($diff->{'from_mode'});
4415                 }
4416
4417                 if ($diff->{'status'} eq "A") { # created
4418                         my $mode_chng = "<span class=\"file_status new\">[new $to_file_type";
4419                         $mode_chng   .= " with mode: $to_mode_str" if $to_mode_str;
4420                         $mode_chng   .= "]</span>";
4421                         print "<td>";
4422                         print $cgi->a({-href => href(action=>"blob", hash=>$diff->{'to_id'},
4423                                                      hash_base=>$hash, file_name=>$diff->{'file'}),
4424                                       -class => "list"}, esc_path($diff->{'file'}));
4425                         print "</td>\n";
4426                         print "<td>$mode_chng</td>\n";
4427                         print "<td class=\"link\">";
4428                         if ($action eq 'commitdiff') {
4429                                 # link to patch
4430                                 $patchno++;
4431                                 print $cgi->a({-href => "#patch$patchno"}, "patch");
4432                                 print " | ";
4433                         }
4434                         print $cgi->a({-href => href(action=>"blob", hash=>$diff->{'to_id'},
4435                                                      hash_base=>$hash, file_name=>$diff->{'file'})},
4436                                       "blob");
4437                         print "</td>\n";
4438
4439                 } elsif ($diff->{'status'} eq "D") { # deleted
4440                         my $mode_chng = "<span class=\"file_status deleted\">[deleted $from_file_type]</span>";
4441                         print "<td>";
4442                         print $cgi->a({-href => href(action=>"blob", hash=>$diff->{'from_id'},
4443                                                      hash_base=>$parent, file_name=>$diff->{'file'}),
4444                                        -class => "list"}, esc_path($diff->{'file'}));
4445                         print "</td>\n";
4446                         print "<td>$mode_chng</td>\n";
4447                         print "<td class=\"link\">";
4448                         if ($action eq 'commitdiff') {
4449                                 # link to patch
4450                                 $patchno++;
4451                                 print $cgi->a({-href => "#patch$patchno"}, "patch");
4452                                 print " | ";
4453                         }
4454                         print $cgi->a({-href => href(action=>"blob", hash=>$diff->{'from_id'},
4455                                                      hash_base=>$parent, file_name=>$diff->{'file'})},
4456                                       "blob") . " | ";
4457                         if ($have_blame) {
4458                                 print $cgi->a({-href => href(action=>"blame", hash_base=>$parent,
4459                                                              file_name=>$diff->{'file'})},
4460                                               "blame") . " | ";
4461                         }
4462                         print $cgi->a({-href => href(action=>"history", hash_base=>$parent,
4463                                                      file_name=>$diff->{'file'})},
4464                                       "history");
4465                         print "</td>\n";
4466
4467                 } elsif ($diff->{'status'} eq "M" || $diff->{'status'} eq "T") { # modified, or type changed
4468                         my $mode_chnge = "";
4469                         if ($diff->{'from_mode'} != $diff->{'to_mode'}) {
4470                                 $mode_chnge = "<span class=\"file_status mode_chnge\">[changed";
4471                                 if ($from_file_type ne $to_file_type) {
4472                                         $mode_chnge .= " from $from_file_type to $to_file_type";
4473                                 }
4474                                 if (($from_mode_oct & 0777) != ($to_mode_oct & 0777)) {
4475                                         if ($from_mode_str && $to_mode_str) {
4476                                                 $mode_chnge .= " mode: $from_mode_str->$to_mode_str";
4477                                         } elsif ($to_mode_str) {
4478                                                 $mode_chnge .= " mode: $to_mode_str";
4479                                         }
4480                                 }
4481                                 $mode_chnge .= "]</span>\n";
4482                         }
4483                         print "<td>";
4484                         print $cgi->a({-href => href(action=>"blob", hash=>$diff->{'to_id'},
4485                                                      hash_base=>$hash, file_name=>$diff->{'file'}),
4486                                       -class => "list"}, esc_path($diff->{'file'}));
4487                         print "</td>\n";
4488                         print "<td>$mode_chnge</td>\n";
4489                         print "<td class=\"link\">";
4490                         if ($action eq 'commitdiff') {
4491                                 # link to patch
4492                                 $patchno++;
4493                                 print $cgi->a({-href => "#patch$patchno"}, "patch") .
4494                                       " | ";
4495                         } elsif ($diff->{'to_id'} ne $diff->{'from_id'}) {
4496                                 # "commit" view and modified file (not onlu mode changed)
4497                                 print $cgi->a({-href => href(action=>"blobdiff",
4498                                                              hash=>$diff->{'to_id'}, hash_parent=>$diff->{'from_id'},
4499                                                              hash_base=>$hash, hash_parent_base=>$parent,
4500                                                              file_name=>$diff->{'file'})},
4501                                               "diff") .
4502                                       " | ";
4503                         }
4504                         print $cgi->a({-href => href(action=>"blob", hash=>$diff->{'to_id'},
4505                                                      hash_base=>$hash, file_name=>$diff->{'file'})},
4506                                        "blob") . " | ";
4507                         if ($have_blame) {
4508                                 print $cgi->a({-href => href(action=>"blame", hash_base=>$hash,
4509                                                              file_name=>$diff->{'file'})},
4510                                               "blame") . " | ";
4511                         }
4512                         print $cgi->a({-href => href(action=>"history", hash_base=>$hash,
4513                                                      file_name=>$diff->{'file'})},
4514                                       "history");
4515                         print "</td>\n";
4516
4517                 } elsif ($diff->{'status'} eq "R" || $diff->{'status'} eq "C") { # renamed or copied
4518                         my %status_name = ('R' => 'moved', 'C' => 'copied');
4519                         my $nstatus = $status_name{$diff->{'status'}};
4520                         my $mode_chng = "";
4521                         if ($diff->{'from_mode'} != $diff->{'to_mode'}) {
4522                                 # mode also for directories, so we cannot use $to_mode_str
4523                                 $mode_chng = sprintf(", mode: %04o", $to_mode_oct & 0777);
4524                         }
4525                         print "<td>" .
4526                               $cgi->a({-href => href(action=>"blob", hash_base=>$hash,
4527                                                      hash=>$diff->{'to_id'}, file_name=>$diff->{'to_file'}),
4528                                       -class => "list"}, esc_path($diff->{'to_file'})) . "</td>\n" .
4529                               "<td><span class=\"file_status $nstatus\">[$nstatus from " .
4530                               $cgi->a({-href => href(action=>"blob", hash_base=>$parent,
4531                                                      hash=>$diff->{'from_id'}, file_name=>$diff->{'from_file'}),
4532                                       -class => "list"}, esc_path($diff->{'from_file'})) .
4533                               " with " . (int $diff->{'similarity'}) . "% similarity$mode_chng]</span></td>\n" .
4534                               "<td class=\"link\">";
4535                         if ($action eq 'commitdiff') {
4536                                 # link to patch
4537                                 $patchno++;
4538                                 print $cgi->a({-href => "#patch$patchno"}, "patch") .
4539                                       " | ";
4540                         } elsif ($diff->{'to_id'} ne $diff->{'from_id'}) {
4541                                 # "commit" view and modified file (not only pure rename or copy)
4542                                 print $cgi->a({-href => href(action=>"blobdiff",
4543                                                              hash=>$diff->{'to_id'}, hash_parent=>$diff->{'from_id'},
4544                                                              hash_base=>$hash, hash_parent_base=>$parent,
4545                                                              file_name=>$diff->{'to_file'}, file_parent=>$diff->{'from_file'})},
4546                                               "diff") .
4547                                       " | ";
4548                         }
4549                         print $cgi->a({-href => href(action=>"blob", hash=>$diff->{'to_id'},
4550                                                      hash_base=>$parent, file_name=>$diff->{'to_file'})},
4551                                       "blob") . " | ";
4552                         if ($have_blame) {
4553                                 print $cgi->a({-href => href(action=>"blame", hash_base=>$hash,
4554                                                              file_name=>$diff->{'to_file'})},
4555                                               "blame") . " | ";
4556                         }
4557                         print $cgi->a({-href => href(action=>"history", hash_base=>$hash,
4558                                                     file_name=>$diff->{'to_file'})},
4559                                       "history");
4560                         print "</td>\n";
4561
4562                 } # we should not encounter Unmerged (U) or Unknown (X) status
4563                 print "</tr>\n";
4564         }
4565         print "</tbody>" if $has_header;
4566         print "</table>\n";
4567 }
4568
4569 sub git_patchset_body {
4570         my ($fd, $difftree, $hash, @hash_parents) = @_;
4571         my ($hash_parent) = $hash_parents[0];
4572
4573         my $is_combined = (@hash_parents > 1);
4574         my $patch_idx = 0;
4575         my $patch_number = 0;
4576         my $patch_line;
4577         my $diffinfo;
4578         my $to_name;
4579         my (%from, %to);
4580
4581         print "<div class=\"patchset\">\n";
4582
4583         # skip to first patch
4584         while ($patch_line = <$fd>) {
4585                 chomp $patch_line;
4586
4587                 last if ($patch_line =~ m/^diff /);
4588         }
4589
4590  PATCH:
4591         while ($patch_line) {
4592
4593                 # parse "git diff" header line
4594                 if ($patch_line =~ m/^diff --git (\"(?:[^\\\"]*(?:\\.[^\\\"]*)*)\"|[^ "]*) (.*)$/) {
4595                         # $1 is from_name, which we do not use
4596                         $to_name = unquote($2);
4597                         $to_name =~ s!^b/!!;
4598                 } elsif ($patch_line =~ m/^diff --(cc|combined) ("?.*"?)$/) {
4599                         # $1 is 'cc' or 'combined', which we do not use
4600                         $to_name = unquote($2);
4601                 } else {
4602                         $to_name = undef;
4603                 }
4604
4605                 # check if current patch belong to current raw line
4606                 # and parse raw git-diff line if needed
4607                 if (is_patch_split($diffinfo, { 'to_file' => $to_name })) {
4608                         # this is continuation of a split patch
4609                         print "<div class=\"patch cont\">\n";
4610                 } else {
4611                         # advance raw git-diff output if needed
4612                         $patch_idx++ if defined $diffinfo;
4613
4614                         # read and prepare patch information
4615                         $diffinfo = parsed_difftree_line($difftree->[$patch_idx]);
4616
4617                         # compact combined diff output can have some patches skipped
4618                         # find which patch (using pathname of result) we are at now;
4619                         if ($is_combined) {
4620                                 while ($to_name ne $diffinfo->{'to_file'}) {
4621                                         print "<div class=\"patch\" id=\"patch". ($patch_idx+1) ."\">\n" .
4622                                               format_diff_cc_simplified($diffinfo, @hash_parents) .
4623                                               "</div>\n";  # class="patch"
4624
4625                                         $patch_idx++;
4626                                         $patch_number++;
4627
4628                                         last if $patch_idx > $#$difftree;
4629                                         $diffinfo = parsed_difftree_line($difftree->[$patch_idx]);
4630                                 }
4631                         }
4632
4633                         # modifies %from, %to hashes
4634                         parse_from_to_diffinfo($diffinfo, \%from, \%to, @hash_parents);
4635
4636                         # this is first patch for raw difftree line with $patch_idx index
4637                         # we index @$difftree array from 0, but number patches from 1
4638                         print "<div class=\"patch\" id=\"patch". ($patch_idx+1) ."\">\n";
4639                 }
4640
4641                 # git diff header
4642                 #assert($patch_line =~ m/^diff /) if DEBUG;
4643                 #assert($patch_line !~ m!$/$!) if DEBUG; # is chomp-ed
4644                 $patch_number++;
4645                 # print "git diff" header
4646                 print format_git_diff_header_line($patch_line, $diffinfo,
4647                                                   \%from, \%to);
4648
4649                 # print extended diff header
4650                 print "<div class=\"diff extended_header\">\n";
4651         EXTENDED_HEADER:
4652                 while ($patch_line = <$fd>) {
4653                         chomp $patch_line;
4654
4655                         last EXTENDED_HEADER if ($patch_line =~ m/^--- |^diff /);
4656
4657                         print format_extended_diff_header_line($patch_line, $diffinfo,
4658                                                                \%from, \%to);
4659                 }
4660                 print "</div>\n"; # class="diff extended_header"
4661
4662                 # from-file/to-file diff header
4663                 if (! $patch_line) {
4664                         print "</div>\n"; # class="patch"
4665                         last PATCH;
4666                 }
4667                 next PATCH if ($patch_line =~ m/^diff /);
4668                 #assert($patch_line =~ m/^---/) if DEBUG;
4669
4670                 my $last_patch_line = $patch_line;
4671                 $patch_line = <$fd>;
4672                 chomp $patch_line;
4673                 #assert($patch_line =~ m/^\+\+\+/) if DEBUG;
4674
4675                 print format_diff_from_to_header($last_patch_line, $patch_line,
4676                                                  $diffinfo, \%from, \%to,
4677                                                  @hash_parents);
4678
4679                 # the patch itself
4680         LINE:
4681                 while ($patch_line = <$fd>) {
4682                         chomp $patch_line;
4683
4684                         next PATCH if ($patch_line =~ m/^diff /);
4685
4686                         print format_diff_line($patch_line, \%from, \%to);
4687                 }
4688
4689         } continue {
4690                 print "</div>\n"; # class="patch"
4691         }
4692
4693         # for compact combined (--cc) format, with chunk and patch simplification
4694         # the patchset might be empty, but there might be unprocessed raw lines
4695         for (++$patch_idx if $patch_number > 0;
4696              $patch_idx < @$difftree;
4697              ++$patch_idx) {
4698                 # read and prepare patch information
4699                 $diffinfo = parsed_difftree_line($difftree->[$patch_idx]);
4700
4701                 # generate anchor for "patch" links in difftree / whatchanged part
4702                 print "<div class=\"patch\" id=\"patch". ($patch_idx+1) ."\">\n" .
4703                       format_diff_cc_simplified($diffinfo, @hash_parents) .
4704                       "</div>\n";  # class="patch"
4705
4706                 $patch_number++;
4707         }
4708
4709         if ($patch_number == 0) {
4710                 if (@hash_parents > 1) {
4711                         print "<div class=\"diff nodifferences\">Trivial merge</div>\n";
4712                 } else {
4713                         print "<div class=\"diff nodifferences\">No differences found</div>\n";
4714                 }
4715         }
4716
4717         print "</div>\n"; # class="patchset"
4718 }
4719
4720 # . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
4721
4722 # fills project list info (age, description, owner, forks) for each
4723 # project in the list, removing invalid projects from returned list
4724 # NOTE: modifies $projlist, but does not remove entries from it
4725 sub fill_project_list_info {
4726         my ($projlist, $check_forks) = @_;
4727         my @projects;
4728
4729         my $show_ctags = gitweb_check_feature('ctags');
4730  PROJECT:
4731         foreach my $pr (@$projlist) {
4732                 my (@activity) = git_get_last_activity($pr->{'path'});
4733                 unless (@activity) {
4734                         next PROJECT;
4735                 }
4736                 ($pr->{'age'}, $pr->{'age_string'}) = @activity;
4737                 if (!defined $pr->{'descr'}) {
4738                         my $descr = git_get_project_description($pr->{'path'}) || "";
4739                         $descr = to_utf8($descr);
4740                         $pr->{'descr_long'} = $descr;
4741                         $pr->{'descr'} = chop_str($descr, $projects_list_description_width, 5);
4742                 }
4743                 if (!defined $pr->{'owner'}) {
4744                         $pr->{'owner'} = git_get_project_owner("$pr->{'path'}") || "";
4745                 }
4746                 if ($check_forks) {
4747                         my $pname = $pr->{'path'};
4748                         if (($pname =~ s/\.git$//) &&
4749                             ($pname !~ /\/$/) &&
4750                             (-d "$projectroot/$pname")) {
4751                                 $pr->{'forks'} = "-d $projectroot/$pname";
4752                         } else {
4753                                 $pr->{'forks'} = 0;
4754                         }
4755                 }
4756                 $show_ctags and $pr->{'ctags'} = git_get_project_ctags($pr->{'path'});
4757                 push @projects, $pr;
4758         }
4759
4760         return @projects;
4761 }
4762
4763 # print 'sort by' <th> element, generating 'sort by $name' replay link
4764 # if that order is not selected
4765 sub print_sort_th {
4766         print format_sort_th(@_);
4767 }
4768
4769 sub format_sort_th {
4770         my ($name, $order, $header) = @_;
4771         my $sort_th = "";
4772         $header ||= ucfirst($name);
4773
4774         if ($order eq $name) {
4775                 $sort_th .= "<th>$header</th>\n";
4776         } else {
4777                 $sort_th .= "<th>" .
4778                             $cgi->a({-href => href(-replay=>1, order=>$name),
4779                                      -class => "header"}, $header) .
4780                             "</th>\n";
4781         }
4782
4783         return $sort_th;
4784 }
4785
4786 sub git_project_list_body {
4787         # actually uses global variable $project
4788         my ($projlist, $order, $from, $to, $extra, $no_header) = @_;
4789
4790         my $check_forks = gitweb_check_feature('forks');
4791         my @projects = fill_project_list_info($projlist, $check_forks);
4792
4793         $order ||= $default_projects_order;
4794         $from = 0 unless defined $from;
4795         $to = $#projects if (!defined $to || $#projects < $to);
4796
4797         my %order_info = (
4798                 project => { key => 'path', type => 'str' },
4799                 descr => { key => 'descr_long', type => 'str' },
4800                 owner => { key => 'owner', type => 'str' },
4801                 age => { key => 'age', type => 'num' }
4802         );
4803         my $oi = $order_info{$order};
4804         if ($oi->{'type'} eq 'str') {
4805                 @projects = sort {$a->{$oi->{'key'}} cmp $b->{$oi->{'key'}}} @projects;
4806         } else {
4807                 @projects = sort {$a->{$oi->{'key'}} <=> $b->{$oi->{'key'}}} @projects;
4808         }
4809
4810         my $show_ctags = gitweb_check_feature('ctags');
4811         if ($show_ctags) {
4812                 my %ctags;
4813                 foreach my $p (@projects) {
4814                         foreach my $ct (keys %{$p->{'ctags'}}) {
4815                                 $ctags{$ct} += $p->{'ctags'}->{$ct};
4816                         }
4817                 }
4818                 my $cloud = git_populate_project_tagcloud(\%ctags);
4819                 print git_show_project_tagcloud($cloud, 64);
4820         }
4821
4822         print "<table class=\"project_list\">\n";
4823         unless ($no_header) {
4824                 print "<tr>\n";
4825                 if ($check_forks) {
4826                         print "<th></th>\n";
4827                 }
4828                 print_sort_th('project', $order, 'Project');
4829                 print_sort_th('descr', $order, 'Description');
4830                 print_sort_th('owner', $order, 'Owner');
4831                 print_sort_th('age', $order, 'Last Change');
4832                 print "<th></th>\n" . # for links
4833                       "</tr>\n";
4834         }
4835         my $alternate = 1;
4836         my $tagfilter = $cgi->param('by_tag');
4837         for (my $i = $from; $i <= $to; $i++) {
4838                 my $pr = $projects[$i];
4839
4840                 next if $tagfilter and $show_ctags and not grep { lc $_ eq lc $tagfilter } keys %{$pr->{'ctags'}};
4841                 next if $searchtext and not $pr->{'path'} =~ /$searchtext/
4842                         and not $pr->{'descr_long'} =~ /$searchtext/;
4843                 # Weed out forks or non-matching entries of search
4844                 if ($check_forks) {
4845                         my $forkbase = $project; $forkbase ||= ''; $forkbase =~ s#\.git$#/#;
4846                         $forkbase="^$forkbase" if $forkbase;
4847                         next if not $searchtext and not $tagfilter and $show_ctags
4848                                 and $pr->{'path'} =~ m#$forkbase.*/.*#; # regexp-safe
4849                 }
4850
4851                 if ($alternate) {
4852                         print "<tr class=\"dark\">\n";
4853                 } else {
4854                         print "<tr class=\"light\">\n";
4855                 }
4856                 $alternate ^= 1;
4857                 if ($check_forks) {
4858                         print "<td>";
4859                         if ($pr->{'forks'}) {
4860                                 print "<!-- $pr->{'forks'} -->\n";
4861                                 print $cgi->a({-href => href(project=>$pr->{'path'}, action=>"forks")}, "+");
4862                         }
4863                         print "</td>\n";
4864                 }
4865                 print "<td>" . $cgi->a({-href => href(project=>$pr->{'path'}, action=>"summary"),
4866                                         -class => "list"}, esc_html($pr->{'path'})) . "</td>\n" .
4867                       "<td>" . $cgi->a({-href => href(project=>$pr->{'path'}, action=>"summary"),
4868                                         -class => "list", -title => $pr->{'descr_long'}},
4869                                         esc_html($pr->{'descr'})) . "</td>\n" .
4870                       "<td><i>" . chop_and_escape_str($pr->{'owner'}, 15) . "</i></td>\n";
4871                 print "<td class=\"". age_class($pr->{'age'}) . "\">" .
4872                       (defined $pr->{'age_string'} ? $pr->{'age_string'} : "No commits") . "</td>\n" .
4873                       "<td class=\"link\">" .
4874                       $cgi->a({-href => href(project=>$pr->{'path'}, action=>"summary")}, "summary")   . " | " .
4875                       $cgi->a({-href => href(project=>$pr->{'path'}, action=>"shortlog")}, "shortlog") . " | " .
4876                       $cgi->a({-href => href(project=>$pr->{'path'}, action=>"log")}, "log") . " | " .
4877                       $cgi->a({-href => href(project=>$pr->{'path'}, action=>"tree")}, "tree") .
4878                       ($pr->{'forks'} ? " | " . $cgi->a({-href => href(project=>$pr->{'path'}, action=>"forks")}, "forks") : '') .
4879                       "</td>\n" .
4880                       "</tr>\n";
4881         }
4882         if (defined $extra) {
4883                 print "<tr>\n";
4884                 if ($check_forks) {
4885                         print "<td></td>\n";
4886                 }
4887                 print "<td colspan=\"5\">$extra</td>\n" .
4888                       "</tr>\n";
4889         }
4890         print "</table>\n";
4891 }
4892
4893 sub git_log_body {
4894         # uses global variable $project
4895         my ($commitlist, $from, $to, $refs, $extra) = @_;
4896
4897         $from = 0 unless defined $from;
4898         $to = $#{$commitlist} if (!defined $to || $#{$commitlist} < $to);
4899
4900         for (my $i = 0; $i <= $to; $i++) {
4901                 my %co = %{$commitlist->[$i]};
4902                 next if !%co;
4903                 my $commit = $co{'id'};
4904                 my $ref = format_ref_marker($refs, $commit);
4905                 my %ad = parse_date($co{'author_epoch'});
4906                 git_print_header_div('commit',
4907                                "<span class=\"age\">$co{'age_string'}</span>" .
4908                                esc_html($co{'title'}) . $ref,
4909                                $commit);
4910                 print "<div class=\"title_text\">\n" .
4911                       "<div class=\"log_link\">\n" .
4912                       $cgi->a({-href => href(action=>"commit", hash=>$commit)}, "commit") .
4913                       " | " .
4914                       $cgi->a({-href => href(action=>"commitdiff", hash=>$commit)}, "commitdiff") .
4915                       " | " .
4916                       $cgi->a({-href => href(action=>"tree", hash=>$commit, hash_base=>$commit)}, "tree") .
4917                       "<br/>\n" .
4918                       "</div>\n";
4919                       git_print_authorship(\%co, -tag => 'span');
4920                       print "<br/>\n</div>\n";
4921
4922                 print "<div class=\"log_body\">\n";
4923                 git_print_log($co{'comment'}, -final_empty_line=> 1);
4924                 print "</div>\n";
4925         }
4926         if ($extra) {
4927                 print "<div class=\"page_nav\">\n";
4928                 print "$extra\n";
4929                 print "</div>\n";
4930         }
4931 }
4932
4933 sub git_shortlog_body {
4934         # uses global variable $project
4935         my ($commitlist, $from, $to, $refs, $extra) = @_;
4936
4937         $from = 0 unless defined $from;
4938         $to = $#{$commitlist} if (!defined $to || $#{$commitlist} < $to);
4939
4940         print "<table class=\"shortlog\">\n";
4941         my $alternate = 1;
4942         for (my $i = $from; $i <= $to; $i++) {
4943                 my %co = %{$commitlist->[$i]};
4944                 my $commit = $co{'id'};
4945                 my $ref = format_ref_marker($refs, $commit);
4946                 if ($alternate) {
4947                         print "<tr class=\"dark\">\n";
4948                 } else {
4949                         print "<tr class=\"light\">\n";
4950                 }
4951                 $alternate ^= 1;
4952                 # git_summary() used print "<td><i>$co{'age_string'}</i></td>\n" .
4953                 print "<td title=\"$co{'age_string_age'}\"><i>$co{'age_string_date'}</i></td>\n" .
4954                       format_author_html('td', \%co, 10) . "<td>";
4955                 print format_subject_html($co{'title'}, $co{'title_short'},
4956                                           href(action=>"commit", hash=>$commit), $ref);
4957                 print "</td>\n" .
4958                       "<td class=\"link\">" .
4959                       $cgi->a({-href => href(action=>"commit", hash=>$commit)}, "commit") . " | " .
4960                       $cgi->a({-href => href(action=>"commitdiff", hash=>$commit)}, "commitdiff") . " | " .
4961                       $cgi->a({-href => href(action=>"tree", hash=>$commit, hash_base=>$commit)}, "tree");
4962                 my $snapshot_links = format_snapshot_links($commit);
4963                 if (defined $snapshot_links) {
4964                         print " | " . $snapshot_links;
4965                 }
4966                 print "</td>\n" .
4967                       "</tr>\n";
4968         }
4969         if (defined $extra) {
4970                 print "<tr>\n" .
4971                       "<td colspan=\"4\">$extra</td>\n" .
4972                       "</tr>\n";
4973         }
4974         print "</table>\n";
4975 }
4976
4977 sub git_history_body {
4978         # Warning: assumes constant type (blob or tree) during history
4979         my ($commitlist, $from, $to, $refs, $extra,
4980             $file_name, $file_hash, $ftype) = @_;
4981
4982         $from = 0 unless defined $from;
4983         $to = $#{$commitlist} unless (defined $to && $to <= $#{$commitlist});
4984
4985         print "<table class=\"history\">\n";
4986         my $alternate = 1;
4987         for (my $i = $from; $i <= $to; $i++) {
4988                 my %co = %{$commitlist->[$i]};
4989                 if (!%co) {
4990                         next;
4991                 }
4992                 my $commit = $co{'id'};
4993
4994                 my $ref = format_ref_marker($refs, $commit);
4995
4996                 if ($alternate) {
4997                         print "<tr class=\"dark\">\n";
4998                 } else {
4999                         print "<tr class=\"light\">\n";
5000                 }
5001                 $alternate ^= 1;
5002                 print "<td title=\"$co{'age_string_age'}\"><i>$co{'age_string_date'}</i></td>\n" .
5003         # shortlog:   format_author_html('td', \%co, 10)
5004                       format_author_html('td', \%co, 15, 3) . "<td>";
5005                 # originally git_history used chop_str($co{'title'}, 50)
5006                 print format_subject_html($co{'title'}, $co{'title_short'},
5007                                           href(action=>"commit", hash=>$commit), $ref);
5008                 print "</td>\n" .
5009                       "<td class=\"link\">" .
5010                       $cgi->a({-href => href(action=>$ftype, hash_base=>$commit, file_name=>$file_name)}, $ftype) . " | " .
5011                       $cgi->a({-href => href(action=>"commitdiff", hash=>$commit)}, "commitdiff");
5012
5013                 if ($ftype eq 'blob') {
5014                         my $blob_current = $file_hash;
5015                         my $blob_parent  = git_get_hash_by_path($commit, $file_name);
5016                         if (defined $blob_current && defined $blob_parent &&
5017                                         $blob_current ne $blob_parent) {
5018                                 print " | " .
5019                                         $cgi->a({-href => href(action=>"blobdiff",
5020                                                                hash=>$blob_current, hash_parent=>$blob_parent,
5021                                                                hash_base=>$hash_base, hash_parent_base=>$commit,
5022                                                                file_name=>$file_name)},
5023                                                 "diff to current");
5024                         }
5025                 }
5026                 print "</td>\n" .
5027                       "</tr>\n";
5028         }
5029         if (defined $extra) {
5030                 print "<tr>\n" .
5031                       "<td colspan=\"4\">$extra</td>\n" .
5032                       "</tr>\n";
5033         }
5034         print "</table>\n";
5035 }
5036
5037 sub git_tags_body {
5038         # uses global variable $project
5039         my ($taglist, $from, $to, $extra) = @_;
5040         $from = 0 unless defined $from;
5041         $to = $#{$taglist} if (!defined $to || $#{$taglist} < $to);
5042
5043         print "<table class=\"tags\">\n";
5044         my $alternate = 1;
5045         for (my $i = $from; $i <= $to; $i++) {
5046                 my $entry = $taglist->[$i];
5047                 my %tag = %$entry;
5048                 my $comment = $tag{'subject'};
5049                 my $comment_short;
5050                 if (defined $comment) {
5051                         $comment_short = chop_str($comment, 30, 5);
5052                 }
5053                 if ($alternate) {
5054                         print "<tr class=\"dark\">\n";
5055                 } else {
5056                         print "<tr class=\"light\">\n";
5057                 }
5058                 $alternate ^= 1;
5059                 if (defined $tag{'age'}) {
5060                         print "<td><i>$tag{'age'}</i></td>\n";
5061                 } else {
5062                         print "<td></td>\n";
5063                 }
5064                 print "<td>" .
5065                       $cgi->a({-href => href(action=>$tag{'reftype'}, hash=>$tag{'refid'}),
5066                                -class => "list name"}, esc_html($tag{'name'})) .
5067                       "</td>\n" .
5068                       "<td>";
5069                 if (defined $comment) {
5070                         print format_subject_html($comment, $comment_short,
5071                                                   href(action=>"tag", hash=>$tag{'id'}));
5072                 }
5073                 print "</td>\n" .
5074                       "<td class=\"selflink\">";
5075                 if ($tag{'type'} eq "tag") {
5076                         print $cgi->a({-href => href(action=>"tag", hash=>$tag{'id'})}, "tag");
5077                 } else {
5078                         print "&nbsp;";
5079                 }
5080                 print "</td>\n" .
5081                       "<td class=\"link\">" . " | " .
5082                       $cgi->a({-href => href(action=>$tag{'reftype'}, hash=>$tag{'refid'})}, $tag{'reftype'});
5083                 if ($tag{'reftype'} eq "commit") {
5084                         print " | " . $cgi->a({-href => href(action=>"shortlog", hash=>$tag{'fullname'})}, "shortlog") .
5085                               " | " . $cgi->a({-href => href(action=>"log", hash=>$tag{'fullname'})}, "log");
5086                 } elsif ($tag{'reftype'} eq "blob") {
5087                         print " | " . $cgi->a({-href => href(action=>"blob_plain", hash=>$tag{'refid'})}, "raw");
5088                 }
5089                 print "</td>\n" .
5090                       "</tr>";
5091         }
5092         if (defined $extra) {
5093                 print "<tr>\n" .
5094                       "<td colspan=\"5\">$extra</td>\n" .
5095                       "</tr>\n";
5096         }
5097         print "</table>\n";
5098 }
5099
5100 sub git_heads_body {
5101         # uses global variable $project
5102         my ($headlist, $head, $from, $to, $extra) = @_;
5103         $from = 0 unless defined $from;
5104         $to = $#{$headlist} if (!defined $to || $#{$headlist} < $to);
5105
5106         print "<table class=\"heads\">\n";
5107         my $alternate = 1;
5108         for (my $i = $from; $i <= $to; $i++) {
5109                 my $entry = $headlist->[$i];
5110                 my %ref = %$entry;
5111                 my $curr = $ref{'id'} eq $head;
5112                 if ($alternate) {
5113                         print "<tr class=\"dark\">\n";
5114                 } else {
5115                         print "<tr class=\"light\">\n";
5116                 }
5117                 $alternate ^= 1;
5118                 print "<td><i>$ref{'age'}</i></td>\n" .
5119                       ($curr ? "<td class=\"current_head\">" : "<td>") .
5120                       $cgi->a({-href => href(action=>"shortlog", hash=>$ref{'fullname'}),
5121                                -class => "list name"},esc_html($ref{'name'})) .
5122                       "</td>\n" .
5123                       "<td class=\"link\">" .
5124                       $cgi->a({-href => href(action=>"shortlog", hash=>$ref{'fullname'})}, "shortlog") . " | " .
5125                       $cgi->a({-href => href(action=>"log", hash=>$ref{'fullname'})}, "log") . " | " .
5126                       $cgi->a({-href => href(action=>"tree", hash=>$ref{'fullname'}, hash_base=>$ref{'fullname'})}, "tree") .
5127                       "</td>\n" .
5128                       "</tr>";
5129         }
5130         if (defined $extra) {
5131                 print "<tr>\n" .
5132                       "<td colspan=\"3\">$extra</td>\n" .
5133                       "</tr>\n";
5134         }
5135         print "</table>\n";
5136 }
5137
5138 # Display a single remote block
5139 sub git_remote_block {
5140         my ($remote, $rdata, $limit, $head) = @_;
5141
5142         my $heads = $rdata->{'heads'};
5143         my $fetch = $rdata->{'fetch'};
5144         my $push = $rdata->{'push'};
5145
5146         my $urls_table = "<table class=\"projects_list\">\n" ;
5147
5148         if (defined $fetch) {
5149                 if ($fetch eq $push) {
5150                         $urls_table .= format_repo_url("URL", $fetch);
5151                 } else {
5152                         $urls_table .= format_repo_url("Fetch URL", $fetch);
5153                         $urls_table .= format_repo_url("Push URL", $push) if defined $push;
5154                 }
5155         } elsif (defined $push) {
5156                 $urls_table .= format_repo_url("Push URL", $push);
5157         } else {
5158                 $urls_table .= format_repo_url("", "No remote URL");
5159         }
5160
5161         $urls_table .= "</table>\n";
5162
5163         my $dots;
5164         if (defined $limit && $limit < @$heads) {
5165                 $dots = $cgi->a({-href => href(action=>"remotes", hash=>$remote)}, "...");
5166         }
5167
5168         print $urls_table;
5169         git_heads_body($heads, $head, 0, $limit, $dots);
5170 }
5171
5172 # Display a list of remote names with the respective fetch and push URLs
5173 sub git_remotes_list {
5174         my ($remotedata, $limit) = @_;
5175         print "<table class=\"heads\">\n";
5176         my $alternate = 1;
5177         my @remotes = sort keys %$remotedata;
5178
5179         my $limited = $limit && $limit < @remotes;
5180
5181         $#remotes = $limit - 1 if $limited;
5182
5183         while (my $remote = shift @remotes) {
5184                 my $rdata = $remotedata->{$remote};
5185                 my $fetch = $rdata->{'fetch'};
5186                 my $push = $rdata->{'push'};
5187                 if ($alternate) {
5188                         print "<tr class=\"dark\">\n";
5189                 } else {
5190                         print "<tr class=\"light\">\n";
5191                 }
5192                 $alternate ^= 1;
5193                 print "<td>" .
5194                       $cgi->a({-href=> href(action=>'remotes', hash=>$remote),
5195                                -class=> "list name"},esc_html($remote)) .
5196                       "</td>";
5197                 print "<td class=\"link\">" .
5198                       (defined $fetch ? $cgi->a({-href=> $fetch}, "fetch") : "fetch") .
5199                       " | " .
5200                       (defined $push ? $cgi->a({-href=> $push}, "push") : "push") .
5201                       "</td>";
5202
5203                 print "</tr>\n";
5204         }
5205
5206         if ($limited) {
5207                 print "<tr>\n" .
5208                       "<td colspan=\"3\">" .
5209                       $cgi->a({-href => href(action=>"remotes")}, "...") .
5210                       "</td>\n" . "</tr>\n";
5211         }
5212
5213         print "</table>";
5214 }
5215
5216 # Display remote heads grouped by remote, unless there are too many
5217 # remotes, in which case we only display the remote names
5218 sub git_remotes_body {
5219         my ($remotedata, $limit, $head) = @_;
5220         if ($limit and $limit < keys %$remotedata) {
5221                 git_remotes_list($remotedata, $limit);
5222         } else {
5223                 fill_remote_heads($remotedata);
5224                 while (my ($remote, $rdata) = each %$remotedata) {
5225                         git_print_section({-class=>"remote", -id=>$remote},
5226                                 ["remotes", $remote, $remote], sub {
5227                                         git_remote_block($remote, $rdata, $limit, $head);
5228                                 });
5229                 }
5230         }
5231 }
5232
5233 sub git_search_grep_body {
5234         my ($commitlist, $from, $to, $extra) = @_;
5235         $from = 0 unless defined $from;
5236         $to = $#{$commitlist} if (!defined $to || $#{$commitlist} < $to);
5237
5238         print "<table class=\"commit_search\">\n";
5239         my $alternate = 1;
5240         for (my $i = $from; $i <= $to; $i++) {
5241                 my %co = %{$commitlist->[$i]};
5242                 if (!%co) {
5243                         next;
5244                 }
5245                 my $commit = $co{'id'};
5246                 if ($alternate) {
5247                         print "<tr class=\"dark\">\n";
5248                 } else {
5249                         print "<tr class=\"light\">\n";
5250                 }
5251                 $alternate ^= 1;
5252                 print "<td title=\"$co{'age_string_age'}\"><i>$co{'age_string_date'}</i></td>\n" .
5253                       format_author_html('td', \%co, 15, 5) .
5254                       "<td>" .
5255                       $cgi->a({-href => href(action=>"commit", hash=>$co{'id'}),
5256                                -class => "list subject"},
5257                               chop_and_escape_str($co{'title'}, 50) . "<br/>");
5258                 my $comment = $co{'comment'};
5259                 foreach my $line (@$comment) {
5260                         if ($line =~ m/^(.*?)($search_regexp)(.*)$/i) {
5261                                 my ($lead, $match, $trail) = ($1, $2, $3);
5262                                 $match = chop_str($match, 70, 5, 'center');
5263                                 my $contextlen = int((80 - length($match))/2);
5264                                 $contextlen = 30 if ($contextlen > 30);
5265                                 $lead  = chop_str($lead,  $contextlen, 10, 'left');
5266                                 $trail = chop_str($trail, $contextlen, 10, 'right');
5267
5268                                 $lead  = esc_html($lead);
5269                                 $match = esc_html($match);
5270                                 $trail = esc_html($trail);
5271
5272                                 print "$lead<span class=\"match\">$match</span>$trail<br />";
5273                         }
5274                 }
5275                 print "</td>\n" .
5276                       "<td class=\"link\">" .
5277                       $cgi->a({-href => href(action=>"commit", hash=>$co{'id'})}, "commit") .
5278                       " | " .
5279                       $cgi->a({-href => href(action=>"commitdiff", hash=>$co{'id'})}, "commitdiff") .
5280                       " | " .
5281                       $cgi->a({-href => href(action=>"tree", hash=>$co{'tree'}, hash_base=>$co{'id'})}, "tree");
5282                 print "</td>\n" .
5283                       "</tr>\n";
5284         }
5285         if (defined $extra) {
5286                 print "<tr>\n" .
5287                       "<td colspan=\"3\">$extra</td>\n" .
5288                       "</tr>\n";
5289         }
5290         print "</table>\n";
5291 }
5292
5293 ## ======================================================================
5294 ## ======================================================================
5295 ## actions
5296
5297 sub git_project_list {
5298         my $order = $input_params{'order'};
5299         if (defined $order && $order !~ m/none|project|descr|owner|age/) {
5300                 die_error(400, "Unknown order parameter");
5301         }
5302
5303         my @list = git_get_projects_list();
5304         if (!@list) {
5305                 die_error(404, "No projects found");
5306         }
5307
5308         git_header_html();
5309         if (defined $home_text && -f $home_text) {
5310                 print "<div class=\"index_include\">\n";
5311                 insert_file($home_text);
5312                 print "</div>\n";
5313         }
5314         print $cgi->startform(-method => "get") .
5315               "<p class=\"projsearch\">Search:\n" .
5316               $cgi->textfield(-name => "s", -value => $searchtext) . "\n" .
5317               "</p>" .
5318               $cgi->end_form() . "\n";
5319         git_project_list_body(\@list, $order);
5320         git_footer_html();
5321 }
5322
5323 sub git_forks {
5324         my $order = $input_params{'order'};
5325         if (defined $order && $order !~ m/none|project|descr|owner|age/) {
5326                 die_error(400, "Unknown order parameter");
5327         }
5328
5329         my @list = git_get_projects_list($project);
5330         if (!@list) {
5331                 die_error(404, "No forks found");
5332         }
5333
5334         git_header_html();
5335         git_print_page_nav('','');
5336         git_print_header_div('summary', "$project forks");
5337         git_project_list_body(\@list, $order);
5338         git_footer_html();
5339 }
5340
5341 sub git_project_index {
5342         my @projects = git_get_projects_list($project);
5343
5344         print $cgi->header(
5345                 -type => 'text/plain',
5346                 -charset => 'utf-8',
5347                 -content_disposition => 'inline; filename="index.aux"');
5348
5349         foreach my $pr (@projects) {
5350                 if (!exists $pr->{'owner'}) {
5351                         $pr->{'owner'} = git_get_project_owner("$pr->{'path'}");
5352                 }
5353
5354                 my ($path, $owner) = ($pr->{'path'}, $pr->{'owner'});
5355                 # quote as in CGI::Util::encode, but keep the slash, and use '+' for ' '
5356                 $path  =~ s/([^a-zA-Z0-9_.\-\/ ])/sprintf("%%%02X", ord($1))/eg;
5357                 $owner =~ s/([^a-zA-Z0-9_.\-\/ ])/sprintf("%%%02X", ord($1))/eg;
5358                 $path  =~ s/ /\+/g;
5359                 $owner =~ s/ /\+/g;
5360
5361                 print "$path $owner\n";
5362         }
5363 }
5364
5365 sub git_summary {
5366         my $descr = git_get_project_description($project) || "none";
5367         my %co = parse_commit("HEAD");
5368         my %cd = %co ? parse_date($co{'committer_epoch'}, $co{'committer_tz'}) : ();
5369         my $head = $co{'id'};
5370         my $remote_heads = gitweb_check_feature('remote_heads');
5371
5372         my $owner = git_get_project_owner($project);
5373
5374         my $refs = git_get_references();
5375         # These get_*_list functions return one more to allow us to see if
5376         # there are more ...
5377         my @taglist  = git_get_tags_list(16);
5378         my @headlist = git_get_heads_list(16);
5379         my %remotedata = $remote_heads ? git_get_remotes_list() : ();
5380         my @forklist;
5381         my $check_forks = gitweb_check_feature('forks');
5382
5383         if ($check_forks) {
5384                 @forklist = git_get_projects_list($project);
5385         }
5386
5387         git_header_html();
5388         git_print_page_nav('summary','', $head);
5389
5390         print "<div class=\"title\">&nbsp;</div>\n";
5391         print "<table class=\"projects_list\">\n" .
5392               "<tr id=\"metadata_desc\"><td>description</td><td>" . esc_html($descr) . "</td></tr>\n" .
5393               "<tr id=\"metadata_owner\"><td>owner</td><td>" . esc_html($owner) . "</td></tr>\n";
5394         if (defined $cd{'rfc2822'}) {
5395                 print "<tr id=\"metadata_lchange\"><td>last change</td><td>$cd{'rfc2822'}</td></tr>\n";
5396         }
5397
5398         # use per project git URL list in $projectroot/$project/cloneurl
5399         # or make project git URL from git base URL and project name
5400         my $url_tag = "URL";
5401         my @url_list = git_get_project_url_list($project);
5402         @url_list = map { "$_/$project" } @git_base_url_list unless @url_list;
5403         foreach my $git_url (@url_list) {
5404                 next unless $git_url;
5405                 print format_repo_url($url_tag, $git_url);
5406                 $url_tag = "";
5407         }
5408
5409         # Tag cloud
5410         my $show_ctags = gitweb_check_feature('ctags');
5411         if ($show_ctags) {
5412                 my $ctags = git_get_project_ctags($project);
5413                 my $cloud = git_populate_project_tagcloud($ctags);
5414                 print "<tr id=\"metadata_ctags\"><td>Content tags:<br />";
5415                 print "</td>\n<td>" unless %$ctags;
5416                 print "<form action=\"$show_ctags\" method=\"post\"><input type=\"hidden\" name=\"p\" value=\"$project\" />Add: <input type=\"text\" name=\"t\" size=\"8\" /></form>";
5417                 print "</td>\n<td>" if %$ctags;
5418                 print git_show_project_tagcloud($cloud, 48);
5419                 print "</td></tr>";
5420         }
5421
5422         print "</table>\n";
5423
5424         # If XSS prevention is on, we don't include README.html.
5425         # TODO: Allow a readme in some safe format.
5426         if (!$prevent_xss && -s "$projectroot/$project/README.html") {
5427                 print "<div class=\"title\">readme</div>\n" .
5428                       "<div class=\"readme\">\n";
5429                 insert_file("$projectroot/$project/README.html");
5430                 print "\n</div>\n"; # class="readme"
5431         }
5432
5433         # we need to request one more than 16 (0..15) to check if
5434         # those 16 are all
5435         my @commitlist = $head ? parse_commits($head, 17) : ();
5436         if (@commitlist) {
5437                 git_print_header_div('shortlog');
5438                 git_shortlog_body(\@commitlist, 0, 15, $refs,
5439                                   $#commitlist <=  15 ? undef :
5440                                   $cgi->a({-href => href(action=>"shortlog")}, "..."));
5441         }
5442
5443         if (@taglist) {
5444                 git_print_header_div('tags');
5445                 git_tags_body(\@taglist, 0, 15,
5446                               $#taglist <=  15 ? undef :
5447                               $cgi->a({-href => href(action=>"tags")}, "..."));
5448         }
5449
5450         if (@headlist) {
5451                 git_print_header_div('heads');
5452                 git_heads_body(\@headlist, $head, 0, 15,
5453                                $#headlist <= 15 ? undef :
5454                                $cgi->a({-href => href(action=>"heads")}, "..."));
5455         }
5456
5457         if (%remotedata) {
5458                 git_print_header_div('remotes');
5459                 git_remotes_body(\%remotedata, 15, $head);
5460         }
5461
5462         if (@forklist) {
5463                 git_print_header_div('forks');
5464                 git_project_list_body(\@forklist, 'age', 0, 15,
5465                                       $#forklist <= 15 ? undef :
5466                                       $cgi->a({-href => href(action=>"forks")}, "..."),
5467                                       'no_header');
5468         }
5469
5470         git_footer_html();
5471 }
5472
5473 sub git_tag {
5474         my %tag = parse_tag($hash);
5475
5476         if (! %tag) {
5477                 die_error(404, "Unknown tag object");
5478         }
5479
5480         my $head = git_get_head_hash($project);
5481         git_header_html();
5482         git_print_page_nav('','', $head,undef,$head);
5483         git_print_header_div('commit', esc_html($tag{'name'}), $hash);
5484         print "<div class=\"title_text\">\n" .
5485               "<table class=\"object_header\">\n" .
5486               "<tr>\n" .
5487               "<td>object</td>\n" .
5488               "<td>" . $cgi->a({-class => "list", -href => href(action=>$tag{'type'}, hash=>$tag{'object'})},
5489                                $tag{'object'}) . "</td>\n" .
5490               "<td class=\"link\">" . $cgi->a({-href => href(action=>$tag{'type'}, hash=>$tag{'object'})},
5491                                               $tag{'type'}) . "</td>\n" .
5492               "</tr>\n";
5493         if (defined($tag{'author'})) {
5494                 git_print_authorship_rows(\%tag, 'author');
5495         }
5496         print "</table>\n\n" .
5497               "</div>\n";
5498         print "<div class=\"page_body\">";
5499         my $comment = $tag{'comment'};
5500         foreach my $line (@$comment) {
5501                 chomp $line;
5502                 print esc_html($line, -nbsp=>1) . "<br/>\n";
5503         }
5504         print "</div>\n";
5505         git_footer_html();
5506 }
5507
5508 sub git_blame_common {
5509         my $format = shift || 'porcelain';
5510         if ($format eq 'porcelain' && $cgi->param('js')) {
5511                 $format = 'incremental';
5512                 $action = 'blame_incremental'; # for page title etc
5513         }
5514
5515         # permissions
5516         gitweb_check_feature('blame')
5517                 or die_error(403, "Blame view not allowed");
5518
5519         # error checking
5520         die_error(400, "No file name given") unless $file_name;
5521         $hash_base ||= git_get_head_hash($project);
5522         die_error(404, "Couldn't find base commit") unless $hash_base;
5523         my %co = parse_commit($hash_base)
5524                 or die_error(404, "Commit not found");
5525         my $ftype = "blob";
5526         if (!defined $hash) {
5527                 $hash = git_get_hash_by_path($hash_base, $file_name, "blob")
5528                         or die_error(404, "Error looking up file");
5529         } else {
5530                 $ftype = git_get_type($hash);
5531                 if ($ftype !~ "blob") {
5532                         die_error(400, "Object is not a blob");
5533                 }
5534         }
5535
5536         my $fd;
5537         if ($format eq 'incremental') {
5538                 # get file contents (as base)
5539                 open $fd, "-|", git_cmd(), 'cat-file', 'blob', $hash
5540                         or die_error(500, "Open git-cat-file failed");
5541         } elsif ($format eq 'data') {
5542                 # run git-blame --incremental
5543                 open $fd, "-|", git_cmd(), "blame", "--incremental",
5544                         $hash_base, "--", $file_name
5545                         or die_error(500, "Open git-blame --incremental failed");
5546         } else {
5547                 # run git-blame --porcelain
5548                 open $fd, "-|", git_cmd(), "blame", '-p',
5549                         $hash_base, '--', $file_name
5550                         or die_error(500, "Open git-blame --porcelain failed");
5551         }
5552
5553         # incremental blame data returns early
5554         if ($format eq 'data') {
5555                 print $cgi->header(
5556                         -type=>"text/plain", -charset => "utf-8",
5557                         -status=> "200 OK");
5558                 local $| = 1; # output autoflush
5559                 print while <$fd>;
5560                 close $fd
5561                         or print "ERROR $!\n";
5562
5563                 print 'END';
5564                 if (defined $t0 && gitweb_check_feature('timed')) {
5565                         print ' '.
5566                               tv_interval($t0, [ gettimeofday() ]).
5567                               ' '.$number_of_git_cmds;
5568                 }
5569                 print "\n";
5570
5571                 return;
5572         }
5573
5574         # page header
5575         git_header_html();
5576         my $formats_nav =
5577                 $cgi->a({-href => href(action=>"blob", -replay=>1)},
5578                         "blob") .
5579                 " | ";
5580         if ($format eq 'incremental') {
5581                 $formats_nav .=
5582                         $cgi->a({-href => href(action=>"blame", javascript=>0, -replay=>1)},
5583                                 "blame") . " (non-incremental)";
5584         } else {
5585                 $formats_nav .=
5586                         $cgi->a({-href => href(action=>"blame_incremental", -replay=>1)},
5587                                 "blame") . " (incremental)";
5588         }
5589         $formats_nav .=
5590                 " | " .
5591                 $cgi->a({-href => href(action=>"history", -replay=>1)},
5592                         "history") .
5593                 " | " .
5594                 $cgi->a({-href => href(action=>$action, file_name=>$file_name)},
5595                         "HEAD");
5596         git_print_page_nav('','', $hash_base,$co{'tree'},$hash_base, $formats_nav);
5597         git_print_header_div('commit', esc_html($co{'title'}), $hash_base);
5598         git_print_page_path($file_name, $ftype, $hash_base);
5599
5600         # page body
5601         if ($format eq 'incremental') {
5602                 print "<noscript>\n<div class=\"error\"><center><b>\n".
5603                       "This page requires JavaScript to run.\n Use ".
5604                       $cgi->a({-href => href(action=>'blame',javascript=>0,-replay=>1)},
5605                               'this page').
5606                       " instead.\n".
5607                       "</b></center></div>\n</noscript>\n";
5608
5609                 print qq!<div id="progress_bar" style="width: 100%; background-color: yellow"></div>\n!;
5610         }
5611
5612         print qq!<div class="page_body">\n!;
5613         print qq!<div id="progress_info">... / ...</div>\n!
5614                 if ($format eq 'incremental');
5615         print qq!<table id="blame_table" class="blame" width="100%">\n!.
5616               #qq!<col width="5.5em" /><col width="2.5em" /><col width="*" />\n!.
5617               qq!<thead>\n!.
5618               qq!<tr><th>Commit</th><th>Line</th><th>Data</th></tr>\n!.
5619               qq!</thead>\n!.
5620               qq!<tbody>\n!;
5621
5622         my @rev_color = qw(light dark);
5623         my $num_colors = scalar(@rev_color);
5624         my $current_color = 0;
5625
5626         if ($format eq 'incremental') {
5627                 my $color_class = $rev_color[$current_color];
5628
5629                 #contents of a file
5630                 my $linenr = 0;
5631         LINE:
5632                 while (my $line = <$fd>) {
5633                         chomp $line;
5634                         $linenr++;
5635
5636                         print qq!<tr id="l$linenr" class="$color_class">!.
5637                               qq!<td class="sha1"><a href=""> </a></td>!.
5638                               qq!<td class="linenr">!.
5639                               qq!<a class="linenr" href="">$linenr</a></td>!;
5640                         print qq!<td class="pre">! . esc_html($line) . "</td>\n";
5641                         print qq!</tr>\n!;
5642                 }
5643
5644         } else { # porcelain, i.e. ordinary blame
5645                 my %metainfo = (); # saves information about commits
5646
5647                 # blame data
5648         LINE:
5649                 while (my $line = <$fd>) {
5650                         chomp $line;
5651                         # the header: <SHA-1> <src lineno> <dst lineno> [<lines in group>]
5652                         # no <lines in group> for subsequent lines in group of lines
5653                         my ($full_rev, $orig_lineno, $lineno, $group_size) =
5654                            ($line =~ /^([0-9a-f]{40}) (\d+) (\d+)(?: (\d+))?$/);
5655                         if (!exists $metainfo{$full_rev}) {
5656                                 $metainfo{$full_rev} = { 'nprevious' => 0 };
5657                         }
5658                         my $meta = $metainfo{$full_rev};
5659                         my $data;
5660                         while ($data = <$fd>) {
5661                                 chomp $data;
5662                                 last if ($data =~ s/^\t//); # contents of line
5663                                 if ($data =~ /^(\S+)(?: (.*))?$/) {
5664                                         $meta->{$1} = $2 unless exists $meta->{$1};
5665                                 }
5666                                 if ($data =~ /^previous /) {
5667                                         $meta->{'nprevious'}++;
5668                                 }
5669                         }
5670                         my $short_rev = substr($full_rev, 0, 8);
5671                         my $author = $meta->{'author'};
5672                         my %date =
5673                                 parse_date($meta->{'author-time'}, $meta->{'author-tz'});
5674                         my $date = $date{'iso-tz'};
5675                         if ($group_size) {
5676                                 $current_color = ($current_color + 1) % $num_colors;
5677                         }
5678                         my $tr_class = $rev_color[$current_color];
5679                         $tr_class .= ' boundary' if (exists $meta->{'boundary'});
5680                         $tr_class .= ' no-previous' if ($meta->{'nprevious'} == 0);
5681                         $tr_class .= ' multiple-previous' if ($meta->{'nprevious'} > 1);
5682                         print "<tr id=\"l$lineno\" class=\"$tr_class\">\n";
5683                         if ($group_size) {
5684                                 print "<td class=\"sha1\"";
5685                                 print " title=\"". esc_html($author) . ", $date\"";
5686                                 print " rowspan=\"$group_size\"" if ($group_size > 1);
5687                                 print ">";
5688                                 print $cgi->a({-href => href(action=>"commit",
5689                                                              hash=>$full_rev,
5690                                                              file_name=>$file_name)},
5691                                               esc_html($short_rev));
5692                                 if ($group_size >= 2) {
5693                                         my @author_initials = ($author =~ /\b([[:upper:]])\B/g);
5694                                         if (@author_initials) {
5695                                                 print "<br />" .
5696                                                       esc_html(join('', @author_initials));
5697                                                 #           or join('.', ...)
5698                                         }
5699                                 }
5700                                 print "</td>\n";
5701                         }
5702                         # 'previous' <sha1 of parent commit> <filename at commit>
5703                         if (exists $meta->{'previous'} &&
5704                             $meta->{'previous'} =~ /^([a-fA-F0-9]{40}) (.*)$/) {
5705                                 $meta->{'parent'} = $1;
5706                                 $meta->{'file_parent'} = unquote($2);
5707                         }
5708                         my $linenr_commit =
5709                                 exists($meta->{'parent'}) ?
5710                                 $meta->{'parent'} : $full_rev;
5711                         my $linenr_filename =
5712                                 exists($meta->{'file_parent'}) ?
5713                                 $meta->{'file_parent'} : unquote($meta->{'filename'});
5714                         my $blamed = href(action => 'blame',
5715                                           file_name => $linenr_filename,
5716                                           hash_base => $linenr_commit);
5717                         print "<td class=\"linenr\">";
5718                         print $cgi->a({ -href => "$blamed#l$orig_lineno",
5719                                         -class => "linenr" },
5720                                       esc_html($lineno));
5721                         print "</td>";
5722                         print "<td class=\"pre\">" . esc_html($data) . "</td>\n";
5723                         print "</tr>\n";
5724                 } # end while
5725
5726         }
5727
5728         # footer
5729         print "</tbody>\n".
5730               "</table>\n"; # class="blame"
5731         print "</div>\n";   # class="blame_body"
5732         close $fd
5733                 or print "Reading blob failed\n";
5734
5735         git_footer_html();
5736 }
5737
5738 sub git_blame {
5739         git_blame_common();
5740 }
5741
5742 sub git_blame_incremental {
5743         git_blame_common('incremental');
5744 }
5745
5746 sub git_blame_data {
5747         git_blame_common('data');
5748 }
5749
5750 sub git_tags {
5751         my $head = git_get_head_hash($project);
5752         git_header_html();
5753         git_print_page_nav('','', $head,undef,$head,format_ref_views('tags'));
5754         git_print_header_div('summary', $project);
5755
5756         my @tagslist = git_get_tags_list();
5757         if (@tagslist) {
5758                 git_tags_body(\@tagslist);
5759         }
5760         git_footer_html();
5761 }
5762
5763 sub git_heads {
5764         my $head = git_get_head_hash($project);
5765         git_header_html();
5766         git_print_page_nav('','', $head,undef,$head,format_ref_views('heads'));
5767         git_print_header_div('summary', $project);
5768
5769         my @headslist = git_get_heads_list();
5770         if (@headslist) {
5771                 git_heads_body(\@headslist, $head);
5772         }
5773         git_footer_html();
5774 }
5775
5776 # used both for single remote view and for list of all the remotes
5777 sub git_remotes {
5778         gitweb_check_feature('remote_heads')
5779                 or die_error(403, "Remote heads view is disabled");
5780
5781         my $head = git_get_head_hash($project);
5782         my $remote = $input_params{'hash'};
5783
5784         my $remotedata = git_get_remotes_list($remote);
5785         die_error(500, "Unable to get remote information") unless defined $remotedata;
5786
5787         unless (%$remotedata) {
5788                 die_error(404, defined $remote ?
5789                         "Remote $remote not found" :
5790                         "No remotes found");
5791         }
5792
5793         git_header_html(undef, undef, -action_extra => $remote);
5794         git_print_page_nav('', '',  $head, undef, $head,
5795                 format_ref_views($remote ? '' : 'remotes'));
5796
5797         fill_remote_heads($remotedata);
5798         if (defined $remote) {
5799                 git_print_header_div('remotes', "$remote remote for $project");
5800                 git_remote_block($remote, $remotedata->{$remote}, undef, $head);
5801         } else {
5802                 git_print_header_div('summary', "$project remotes");
5803                 git_remotes_body($remotedata, undef, $head);
5804         }
5805
5806         git_footer_html();
5807 }
5808
5809 sub git_blob_plain {
5810         my $type = shift;
5811         my $expires;
5812
5813         if (!defined $hash) {
5814                 if (defined $file_name) {
5815                         my $base = $hash_base || git_get_head_hash($project);
5816                         $hash = git_get_hash_by_path($base, $file_name, "blob")
5817                                 or die_error(404, "Cannot find file");
5818                 } else {
5819                         die_error(400, "No file name defined");
5820                 }
5821         } elsif ($hash =~ m/^[0-9a-fA-F]{40}$/) {
5822                 # blobs defined by non-textual hash id's can be cached
5823                 $expires = "+1d";
5824         }
5825
5826         open my $fd, "-|", git_cmd(), "cat-file", "blob", $hash
5827                 or die_error(500, "Open git-cat-file blob '$hash' failed");
5828
5829         # content-type (can include charset)
5830         $type = blob_contenttype($fd, $file_name, $type);
5831
5832         # "save as" filename, even when no $file_name is given
5833         my $save_as = "$hash";
5834         if (defined $file_name) {
5835                 $save_as = $file_name;
5836         } elsif ($type =~ m/^text\//) {
5837                 $save_as .= '.txt';
5838         }
5839
5840         # With XSS prevention on, blobs of all types except a few known safe
5841         # ones are served with "Content-Disposition: attachment" to make sure
5842         # they don't run in our security domain.  For certain image types,
5843         # blob view writes an <img> tag referring to blob_plain view, and we
5844         # want to be sure not to break that by serving the image as an
5845         # attachment (though Firefox 3 doesn't seem to care).
5846         my $sandbox = $prevent_xss &&
5847                 $type !~ m!^(?:text/plain|image/(?:gif|png|jpeg))$!;
5848
5849         print $cgi->header(
5850                 -type => $type,
5851                 -expires => $expires,
5852                 -content_disposition =>
5853                         ($sandbox ? 'attachment' : 'inline')
5854                         . '; filename="' . $save_as . '"');
5855         local $/ = undef;
5856         binmode STDOUT, ':raw';
5857         print <$fd>;
5858         binmode STDOUT, ':utf8'; # as set at the beginning of gitweb.cgi
5859         close $fd;
5860 }
5861
5862 sub git_blob {
5863         my $expires;
5864
5865         if (!defined $hash) {
5866                 if (defined $file_name) {
5867                         my $base = $hash_base || git_get_head_hash($project);
5868                         $hash = git_get_hash_by_path($base, $file_name, "blob")
5869                                 or die_error(404, "Cannot find file");
5870                 } else {
5871                         die_error(400, "No file name defined");
5872                 }
5873         } elsif ($hash =~ m/^[0-9a-fA-F]{40}$/) {
5874                 # blobs defined by non-textual hash id's can be cached
5875                 $expires = "+1d";
5876         }
5877
5878         my $have_blame = gitweb_check_feature('blame');
5879         open my $fd, "-|", git_cmd(), "cat-file", "blob", $hash
5880                 or die_error(500, "Couldn't cat $file_name, $hash");
5881         my $mimetype = blob_mimetype($fd, $file_name);
5882         # use 'blob_plain' (aka 'raw') view for files that cannot be displayed
5883         if ($mimetype !~ m!^(?:text/|image/(?:gif|png|jpeg)$)! && -B $fd) {
5884                 close $fd;
5885                 return git_blob_plain($mimetype);
5886         }
5887         # we can have blame only for text/* mimetype
5888         $have_blame &&= ($mimetype =~ m!^text/!);
5889
5890         my $highlight = gitweb_check_feature('highlight');
5891         my $syntax = guess_file_syntax($highlight, $mimetype, $file_name);
5892         $fd = run_highlighter($fd, $highlight, $syntax)
5893                 if $syntax;
5894
5895         git_header_html(undef, $expires);
5896         my $formats_nav = '';
5897         if (defined $hash_base && (my %co = parse_commit($hash_base))) {
5898                 if (defined $file_name) {
5899                         if ($have_blame) {
5900                                 $formats_nav .=
5901                                         $cgi->a({-href => href(action=>"blame", -replay=>1)},
5902                                                 "blame") .
5903                                         " | ";
5904                         }
5905                         $formats_nav .=
5906                                 $cgi->a({-href => href(action=>"history", -replay=>1)},
5907                                         "history") .
5908                                 " | " .
5909                                 $cgi->a({-href => href(action=>"blob_plain", -replay=>1)},
5910                                         "raw") .
5911                                 " | " .
5912                                 $cgi->a({-href => href(action=>"blob",
5913                                                        hash_base=>"HEAD", file_name=>$file_name)},
5914                                         "HEAD");
5915                 } else {
5916                         $formats_nav .=
5917                                 $cgi->a({-href => href(action=>"blob_plain", -replay=>1)},
5918                                         "raw");
5919                 }
5920                 git_print_page_nav('','', $hash_base,$co{'tree'},$hash_base, $formats_nav);
5921                 git_print_header_div('commit', esc_html($co{'title'}), $hash_base);
5922         } else {
5923                 print "<div class=\"page_nav\">\n" .
5924                       "<br/><br/></div>\n" .
5925                       "<div class=\"title\">".esc_html($hash)."</div>\n";
5926         }
5927         git_print_page_path($file_name, "blob", $hash_base);
5928         print "<div class=\"page_body\">\n";
5929         if ($mimetype =~ m!^image/!) {
5930                 print qq!<img type="!.esc_attr($mimetype).qq!"!;
5931                 if ($file_name) {
5932                         print qq! alt="!.esc_attr($file_name).qq!" title="!.esc_attr($file_name).qq!"!;
5933                 }
5934                 print qq! src="! .
5935                       href(action=>"blob_plain", hash=>$hash,
5936                            hash_base=>$hash_base, file_name=>$file_name) .
5937                       qq!" />\n!;
5938         } else {
5939                 my $nr;
5940                 while (my $line = <$fd>) {
5941                         chomp $line;
5942                         $nr++;
5943                         $line = untabify($line);
5944                         printf qq!<div class="pre"><a id="l%i" href="%s#l%i" class="linenr">%4i</a> %s</div>\n!,
5945                                $nr, esc_attr(href(-replay => 1)), $nr, $nr, $syntax ? $line : esc_html($line, -nbsp=>1);
5946                 }
5947         }
5948         close $fd
5949                 or print "Reading blob failed.\n";
5950         print "</div>";
5951         git_footer_html();
5952 }
5953
5954 sub git_tree {
5955         if (!defined $hash_base) {
5956                 $hash_base = "HEAD";
5957         }
5958         if (!defined $hash) {
5959                 if (defined $file_name) {
5960                         $hash = git_get_hash_by_path($hash_base, $file_name, "tree");
5961                 } else {
5962                         $hash = $hash_base;
5963                 }
5964         }
5965         die_error(404, "No such tree") unless defined($hash);
5966
5967         my $show_sizes = gitweb_check_feature('show-sizes');
5968         my $have_blame = gitweb_check_feature('blame');
5969
5970         my @entries = ();
5971         {
5972                 local $/ = "\0";
5973                 open my $fd, "-|", git_cmd(), "ls-tree", '-z',
5974                         ($show_sizes ? '-l' : ()), @extra_options, $hash
5975                         or die_error(500, "Open git-ls-tree failed");
5976                 @entries = map { chomp; $_ } <$fd>;
5977                 close $fd
5978                         or die_error(404, "Reading tree failed");
5979         }
5980
5981         my $refs = git_get_references();
5982         my $ref = format_ref_marker($refs, $hash_base);
5983         git_header_html();
5984         my $basedir = '';
5985         if (defined $hash_base && (my %co = parse_commit($hash_base))) {
5986                 my @views_nav = ();
5987                 if (defined $file_name) {
5988                         push @views_nav,
5989                                 $cgi->a({-href => href(action=>"history", -replay=>1)},
5990                                         "history"),
5991                                 $cgi->a({-href => href(action=>"tree",
5992                                                        hash_base=>"HEAD", file_name=>$file_name)},
5993                                         "HEAD"),
5994                 }
5995                 my $snapshot_links = format_snapshot_links($hash);
5996                 if (defined $snapshot_links) {
5997                         # FIXME: Should be available when we have no hash base as well.
5998                         push @views_nav, $snapshot_links;
5999                 }
6000                 git_print_page_nav('tree','', $hash_base, undef, undef,
6001                                    join(' | ', @views_nav));
6002                 git_print_header_div('commit', esc_html($co{'title'}) . $ref, $hash_base);
6003         } else {
6004                 undef $hash_base;
6005                 print "<div class=\"page_nav\">\n";
6006                 print "<br/><br/></div>\n";
6007                 print "<div class=\"title\">".esc_html($hash)."</div>\n";
6008         }
6009         if (defined $file_name) {
6010                 $basedir = $file_name;
6011                 if ($basedir ne '' && substr($basedir, -1) ne '/') {
6012                         $basedir .= '/';
6013                 }
6014                 git_print_page_path($file_name, 'tree', $hash_base);
6015         }
6016         print "<div class=\"page_body\">\n";
6017         print "<table class=\"tree\">\n";
6018         my $alternate = 1;
6019         # '..' (top directory) link if possible
6020         if (defined $hash_base &&
6021             defined $file_name && $file_name =~ m![^/]+$!) {
6022                 if ($alternate) {
6023                         print "<tr class=\"dark\">\n";
6024                 } else {
6025                         print "<tr class=\"light\">\n";
6026                 }
6027                 $alternate ^= 1;
6028
6029                 my $up = $file_name;
6030                 $up =~ s!/?[^/]+$!!;
6031                 undef $up unless $up;
6032                 # based on git_print_tree_entry
6033                 print '<td class="mode">' . mode_str('040000') . "</td>\n";
6034                 print '<td class="size">&nbsp;</td>'."\n" if $show_sizes;
6035                 print '<td class="list">';
6036                 print $cgi->a({-href => href(action=>"tree",
6037                                              hash_base=>$hash_base,
6038                                              file_name=>$up)},
6039                               "..");
6040                 print "</td>\n";
6041                 print "<td class=\"link\"></td>\n";
6042
6043                 print "</tr>\n";
6044         }
6045         foreach my $line (@entries) {
6046                 my %t = parse_ls_tree_line($line, -z => 1, -l => $show_sizes);
6047
6048                 if ($alternate) {
6049                         print "<tr class=\"dark\">\n";
6050                 } else {
6051                         print "<tr class=\"light\">\n";
6052                 }
6053                 $alternate ^= 1;
6054
6055                 git_print_tree_entry(\%t, $basedir, $hash_base, $have_blame);
6056
6057                 print "</tr>\n";
6058         }
6059         print "</table>\n" .
6060               "</div>";
6061         git_footer_html();
6062 }
6063
6064 sub snapshot_name {
6065         my ($project, $hash) = @_;
6066
6067         # path/to/project.git  -> project
6068         # path/to/project/.git -> project
6069         my $name = to_utf8($project);
6070         $name =~ s,([^/])/*\.git$,$1,;
6071         $name = basename($name);
6072         # sanitize name
6073         $name =~ s/[[:cntrl:]]/?/g;
6074
6075         my $ver = $hash;
6076         if ($hash =~ /^[0-9a-fA-F]+$/) {
6077                 # shorten SHA-1 hash
6078                 my $full_hash = git_get_full_hash($project, $hash);
6079                 if ($full_hash =~ /^$hash/ && length($hash) > 7) {
6080                         $ver = git_get_short_hash($project, $hash);
6081                 }
6082         } elsif ($hash =~ m!^refs/tags/(.*)$!) {
6083                 # tags don't need shortened SHA-1 hash
6084                 $ver = $1;
6085         } else {
6086                 # branches and other need shortened SHA-1 hash
6087                 if ($hash =~ m!^refs/(?:heads|remotes)/(.*)$!) {
6088                         $ver = $1;
6089                 }
6090                 $ver .= '-' . git_get_short_hash($project, $hash);
6091         }
6092         # in case of hierarchical branch names
6093         $ver =~ s!/!.!g;
6094
6095         # name = project-version_string
6096         $name = "$name-$ver";
6097
6098         return wantarray ? ($name, $name) : $name;
6099 }
6100
6101 sub git_snapshot {
6102         my $format = $input_params{'snapshot_format'};
6103         if (!@snapshot_fmts) {
6104                 die_error(403, "Snapshots not allowed");
6105         }
6106         # default to first supported snapshot format
6107         $format ||= $snapshot_fmts[0];
6108         if ($format !~ m/^[a-z0-9]+$/) {
6109                 die_error(400, "Invalid snapshot format parameter");
6110         } elsif (!exists($known_snapshot_formats{$format})) {
6111                 die_error(400, "Unknown snapshot format");
6112         } elsif ($known_snapshot_formats{$format}{'disabled'}) {
6113                 die_error(403, "Snapshot format not allowed");
6114         } elsif (!grep($_ eq $format, @snapshot_fmts)) {
6115                 die_error(403, "Unsupported snapshot format");
6116         }
6117
6118         my $type = git_get_type("$hash^{}");
6119         if (!$type) {
6120                 die_error(404, 'Object does not exist');
6121         }  elsif ($type eq 'blob') {
6122                 die_error(400, 'Object is not a tree-ish');
6123         }
6124
6125         my ($name, $prefix) = snapshot_name($project, $hash);
6126         my $filename = "$name$known_snapshot_formats{$format}{'suffix'}";
6127         my $cmd = quote_command(
6128                 git_cmd(), 'archive',
6129                 "--format=$known_snapshot_formats{$format}{'format'}",
6130                 "--prefix=$prefix/", $hash);
6131         if (exists $known_snapshot_formats{$format}{'compressor'}) {
6132                 $cmd .= ' | ' . quote_command(@{$known_snapshot_formats{$format}{'compressor'}});
6133         }
6134
6135         $filename =~ s/(["\\])/\\$1/g;
6136         print $cgi->header(
6137                 -type => $known_snapshot_formats{$format}{'type'},
6138                 -content_disposition => 'inline; filename="' . $filename . '"',
6139                 -status => '200 OK');
6140
6141         open my $fd, "-|", $cmd
6142                 or die_error(500, "Execute git-archive failed");
6143         binmode STDOUT, ':raw';
6144         print <$fd>;
6145         binmode STDOUT, ':utf8'; # as set at the beginning of gitweb.cgi
6146         close $fd;
6147 }
6148
6149 sub git_log_generic {
6150         my ($fmt_name, $body_subr, $base, $parent, $file_name, $file_hash) = @_;
6151
6152         my $head = git_get_head_hash($project);
6153         if (!defined $base) {
6154                 $base = $head;
6155         }
6156         if (!defined $page) {
6157                 $page = 0;
6158         }
6159         my $refs = git_get_references();
6160
6161         my $commit_hash = $base;
6162         if (defined $parent) {
6163                 $commit_hash = "$parent..$base";
6164         }
6165         my @commitlist =
6166                 parse_commits($commit_hash, 101, (100 * $page),
6167                               defined $file_name ? ($file_name, "--full-history") : ());
6168
6169         my $ftype;
6170         if (!defined $file_hash && defined $file_name) {
6171                 # some commits could have deleted file in question,
6172                 # and not have it in tree, but one of them has to have it
6173                 for (my $i = 0; $i < @commitlist; $i++) {
6174                         $file_hash = git_get_hash_by_path($commitlist[$i]{'id'}, $file_name);
6175                         last if defined $file_hash;
6176                 }
6177         }
6178         if (defined $file_hash) {
6179                 $ftype = git_get_type($file_hash);
6180         }
6181         if (defined $file_name && !defined $ftype) {
6182                 die_error(500, "Unknown type of object");
6183         }
6184         my %co;
6185         if (defined $file_name) {
6186                 %co = parse_commit($base)
6187                         or die_error(404, "Unknown commit object");
6188         }
6189
6190
6191         my $paging_nav = format_paging_nav($fmt_name, $page, $#commitlist >= 100);
6192         my $next_link = '';
6193         if ($#commitlist >= 100) {
6194                 $next_link =
6195                         $cgi->a({-href => href(-replay=>1, page=>$page+1),
6196                                  -accesskey => "n", -title => "Alt-n"}, "next");
6197         }
6198         my $patch_max = gitweb_get_feature('patches');
6199         if ($patch_max && !defined $file_name) {
6200                 if ($patch_max < 0 || @commitlist <= $patch_max) {
6201                         $paging_nav .= " &sdot; " .
6202                                 $cgi->a({-href => href(action=>"patches", -replay=>1)},
6203                                         "patches");
6204                 }
6205         }
6206
6207         git_header_html();
6208         git_print_page_nav($fmt_name,'', $hash,$hash,$hash, $paging_nav);
6209         if (defined $file_name) {
6210                 git_print_header_div('commit', esc_html($co{'title'}), $base);
6211         } else {
6212                 git_print_header_div('summary', $project)
6213         }
6214         git_print_page_path($file_name, $ftype, $hash_base)
6215                 if (defined $file_name);
6216
6217         $body_subr->(\@commitlist, 0, 99, $refs, $next_link,
6218                      $file_name, $file_hash, $ftype);
6219
6220         git_footer_html();
6221 }
6222
6223 sub git_log {
6224         git_log_generic('log', \&git_log_body,
6225                         $hash, $hash_parent);
6226 }
6227
6228 sub git_commit {
6229         $hash ||= $hash_base || "HEAD";
6230         my %co = parse_commit($hash)
6231             or die_error(404, "Unknown commit object");
6232
6233         my $parent  = $co{'parent'};
6234         my $parents = $co{'parents'}; # listref
6235
6236         # we need to prepare $formats_nav before any parameter munging
6237         my $formats_nav;
6238         if (!defined $parent) {
6239                 # --root commitdiff
6240                 $formats_nav .= '(initial)';
6241         } elsif (@$parents == 1) {
6242                 # single parent commit
6243                 $formats_nav .=
6244                         '(parent: ' .
6245                         $cgi->a({-href => href(action=>"commit",
6246                                                hash=>$parent)},
6247                                 esc_html(substr($parent, 0, 7))) .
6248                         ')';
6249         } else {
6250                 # merge commit
6251                 $formats_nav .=
6252                         '(merge: ' .
6253                         join(' ', map {
6254                                 $cgi->a({-href => href(action=>"commit",
6255                                                        hash=>$_)},
6256                                         esc_html(substr($_, 0, 7)));
6257                         } @$parents ) .
6258                         ')';
6259         }
6260         if (gitweb_check_feature('patches') && @$parents <= 1) {
6261                 $formats_nav .= " | " .
6262                         $cgi->a({-href => href(action=>"patch", -replay=>1)},
6263                                 "patch");
6264         }
6265
6266         if (!defined $parent) {
6267                 $parent = "--root";
6268         }
6269         my @difftree;
6270         open my $fd, "-|", git_cmd(), "diff-tree", '-r', "--no-commit-id",
6271                 @diff_opts,
6272                 (@$parents <= 1 ? $parent : '-c'),
6273                 $hash, "--"
6274                 or die_error(500, "Open git-diff-tree failed");
6275         @difftree = map { chomp; $_ } <$fd>;
6276         close $fd or die_error(404, "Reading git-diff-tree failed");
6277
6278         # non-textual hash id's can be cached
6279         my $expires;
6280         if ($hash =~ m/^[0-9a-fA-F]{40}$/) {
6281                 $expires = "+1d";
6282         }
6283         my $refs = git_get_references();
6284         my $ref = format_ref_marker($refs, $co{'id'});
6285
6286         git_header_html(undef, $expires);
6287         git_print_page_nav('commit', '',
6288                            $hash, $co{'tree'}, $hash,
6289                            $formats_nav);
6290
6291         if (defined $co{'parent'}) {
6292                 git_print_header_div('commitdiff', esc_html($co{'title'}) . $ref, $hash);
6293         } else {
6294                 git_print_header_div('tree', esc_html($co{'title'}) . $ref, $co{'tree'}, $hash);
6295         }
6296         print "<div class=\"title_text\">\n" .
6297               "<table class=\"object_header\">\n";
6298         git_print_authorship_rows(\%co);
6299         print "<tr><td>commit</td><td class=\"sha1\">$co{'id'}</td></tr>\n";
6300         print "<tr>" .
6301               "<td>tree</td>" .
6302               "<td class=\"sha1\">" .
6303               $cgi->a({-href => href(action=>"tree", hash=>$co{'tree'}, hash_base=>$hash),
6304                        class => "list"}, $co{'tree'}) .
6305               "</td>" .
6306               "<td class=\"link\">" .
6307               $cgi->a({-href => href(action=>"tree", hash=>$co{'tree'}, hash_base=>$hash)},
6308                       "tree");
6309         my $snapshot_links = format_snapshot_links($hash);
6310         if (defined $snapshot_links) {
6311                 print " | " . $snapshot_links;
6312         }
6313         print "</td>" .
6314               "</tr>\n";
6315
6316         foreach my $par (@$parents) {
6317                 print "<tr>" .
6318                       "<td>parent</td>" .
6319                       "<td class=\"sha1\">" .
6320                       $cgi->a({-href => href(action=>"commit", hash=>$par),
6321                                class => "list"}, $par) .
6322                       "</td>" .
6323                       "<td class=\"link\">" .
6324                       $cgi->a({-href => href(action=>"commit", hash=>$par)}, "commit") .
6325                       " | " .
6326                       $cgi->a({-href => href(action=>"commitdiff", hash=>$hash, hash_parent=>$par)}, "diff") .
6327                       "</td>" .
6328                       "</tr>\n";
6329         }
6330         print "</table>".
6331               "</div>\n";
6332
6333         print "<div class=\"page_body\">\n";
6334         git_print_log($co{'comment'});
6335         print "</div>\n";
6336
6337         git_difftree_body(\@difftree, $hash, @$parents);
6338
6339         git_footer_html();
6340 }
6341
6342 sub git_object {
6343         # object is defined by:
6344         # - hash or hash_base alone
6345         # - hash_base and file_name
6346         my $type;
6347
6348         # - hash or hash_base alone
6349         if ($hash || ($hash_base && !defined $file_name)) {
6350                 my $object_id = $hash || $hash_base;
6351
6352                 open my $fd, "-|", quote_command(
6353                         git_cmd(), 'cat-file', '-t', $object_id) . ' 2> /dev/null'
6354                         or die_error(404, "Object does not exist");
6355                 $type = <$fd>;
6356                 chomp $type;
6357                 close $fd
6358                         or die_error(404, "Object does not exist");
6359
6360         # - hash_base and file_name
6361         } elsif ($hash_base && defined $file_name) {
6362                 $file_name =~ s,/+$,,;
6363
6364                 system(git_cmd(), "cat-file", '-e', $hash_base) == 0
6365                         or die_error(404, "Base object does not exist");
6366
6367                 # here errors should not hapen
6368                 open my $fd, "-|", git_cmd(), "ls-tree", $hash_base, "--", $file_name
6369                         or die_error(500, "Open git-ls-tree failed");
6370                 my $line = <$fd>;
6371                 close $fd;
6372
6373                 #'100644 blob 0fa3f3a66fb6a137f6ec2c19351ed4d807070ffa  panic.c'
6374                 unless ($line && $line =~ m/^([0-9]+) (.+) ([0-9a-fA-F]{40})\t/) {
6375                         die_error(404, "File or directory for given base does not exist");
6376                 }
6377                 $type = $2;
6378                 $hash = $3;
6379         } else {
6380                 die_error(400, "Not enough information to find object");
6381         }
6382
6383         print $cgi->redirect(-uri => href(action=>$type, -full=>1,
6384                                           hash=>$hash, hash_base=>$hash_base,
6385                                           file_name=>$file_name),
6386                              -status => '302 Found');
6387 }
6388
6389 sub git_blobdiff {
6390         my $format = shift || 'html';
6391
6392         my $fd;
6393         my @difftree;
6394         my %diffinfo;
6395         my $expires;
6396
6397         # preparing $fd and %diffinfo for git_patchset_body
6398         # new style URI
6399         if (defined $hash_base && defined $hash_parent_base) {
6400                 if (defined $file_name) {
6401                         # read raw output
6402                         open $fd, "-|", git_cmd(), "diff-tree", '-r', @diff_opts,
6403                                 $hash_parent_base, $hash_base,
6404                                 "--", (defined $file_parent ? $file_parent : ()), $file_name
6405                                 or die_error(500, "Open git-diff-tree failed");
6406                         @difftree = map { chomp; $_ } <$fd>;
6407                         close $fd
6408                                 or die_error(404, "Reading git-diff-tree failed");
6409                         @difftree
6410                                 or die_error(404, "Blob diff not found");
6411
6412                 } elsif (defined $hash &&
6413                          $hash =~ /[0-9a-fA-F]{40}/) {
6414                         # try to find filename from $hash
6415
6416                         # read filtered raw output
6417                         open $fd, "-|", git_cmd(), "diff-tree", '-r', @diff_opts,
6418                                 $hash_parent_base, $hash_base, "--"
6419                                 or die_error(500, "Open git-diff-tree failed");
6420                         @difftree =
6421                                 # ':100644 100644 03b21826... 3b93d5e7... M     ls-files.c'
6422                                 # $hash == to_id
6423                                 grep { /^:[0-7]{6} [0-7]{6} [0-9a-fA-F]{40} $hash/ }
6424                                 map { chomp; $_ } <$fd>;
6425                         close $fd
6426                                 or die_error(404, "Reading git-diff-tree failed");
6427                         @difftree
6428                                 or die_error(404, "Blob diff not found");
6429
6430                 } else {
6431                         die_error(400, "Missing one of the blob diff parameters");
6432                 }
6433
6434                 if (@difftree > 1) {
6435                         die_error(400, "Ambiguous blob diff specification");
6436                 }
6437
6438                 %diffinfo = parse_difftree_raw_line($difftree[0]);
6439                 $file_parent ||= $diffinfo{'from_file'} || $file_name;
6440                 $file_name   ||= $diffinfo{'to_file'};
6441
6442                 $hash_parent ||= $diffinfo{'from_id'};
6443                 $hash        ||= $diffinfo{'to_id'};
6444
6445                 # non-textual hash id's can be cached
6446                 if ($hash_base =~ m/^[0-9a-fA-F]{40}$/ &&
6447                     $hash_parent_base =~ m/^[0-9a-fA-F]{40}$/) {
6448                         $expires = '+1d';
6449                 }
6450
6451                 # open patch output
6452                 open $fd, "-|", git_cmd(), "diff-tree", '-r', @diff_opts,
6453                         '-p', ($format eq 'html' ? "--full-index" : ()),
6454                         $hash_parent_base, $hash_base,
6455                         "--", (defined $file_parent ? $file_parent : ()), $file_name
6456                         or die_error(500, "Open git-diff-tree failed");
6457         }
6458
6459         # old/legacy style URI -- not generated anymore since 1.4.3.
6460         if (!%diffinfo) {
6461                 die_error('404 Not Found', "Missing one of the blob diff parameters")
6462         }
6463
6464         # header
6465         if ($format eq 'html') {
6466                 my $formats_nav =
6467                         $cgi->a({-href => href(action=>"blobdiff_plain", -replay=>1)},
6468                                 "raw");
6469                 git_header_html(undef, $expires);
6470                 if (defined $hash_base && (my %co = parse_commit($hash_base))) {
6471                         git_print_page_nav('','', $hash_base,$co{'tree'},$hash_base, $formats_nav);
6472                         git_print_header_div('commit', esc_html($co{'title'}), $hash_base);
6473                 } else {
6474                         print "<div class=\"page_nav\"><br/>$formats_nav<br/></div>\n";
6475                         print "<div class=\"title\">".esc_html("$hash vs $hash_parent")."</div>\n";
6476                 }
6477                 if (defined $file_name) {
6478                         git_print_page_path($file_name, "blob", $hash_base);
6479                 } else {
6480                         print "<div class=\"page_path\"></div>\n";
6481                 }
6482
6483         } elsif ($format eq 'plain') {
6484                 print $cgi->header(
6485                         -type => 'text/plain',
6486                         -charset => 'utf-8',
6487                         -expires => $expires,
6488                         -content_disposition => 'inline; filename="' . "$file_name" . '.patch"');
6489
6490                 print "X-Git-Url: " . $cgi->self_url() . "\n\n";
6491
6492         } else {
6493                 die_error(400, "Unknown blobdiff format");
6494         }
6495
6496         # patch
6497         if ($format eq 'html') {
6498                 print "<div class=\"page_body\">\n";
6499
6500                 git_patchset_body($fd, [ \%diffinfo ], $hash_base, $hash_parent_base);
6501                 close $fd;
6502
6503                 print "</div>\n"; # class="page_body"
6504                 git_footer_html();
6505
6506         } else {
6507                 while (my $line = <$fd>) {
6508                         $line =~ s!a/($hash|$hash_parent)!'a/'.esc_path($diffinfo{'from_file'})!eg;
6509                         $line =~ s!b/($hash|$hash_parent)!'b/'.esc_path($diffinfo{'to_file'})!eg;
6510
6511                         print $line;
6512
6513                         last if $line =~ m!^\+\+\+!;
6514                 }
6515                 local $/ = undef;
6516                 print <$fd>;
6517                 close $fd;
6518         }
6519 }
6520
6521 sub git_blobdiff_plain {
6522         git_blobdiff('plain');
6523 }
6524
6525 sub git_commitdiff {
6526         my %params = @_;
6527         my $format = $params{-format} || 'html';
6528
6529         my ($patch_max) = gitweb_get_feature('patches');
6530         if ($format eq 'patch') {
6531                 die_error(403, "Patch view not allowed") unless $patch_max;
6532         }
6533
6534         $hash ||= $hash_base || "HEAD";
6535         my %co = parse_commit($hash)
6536             or die_error(404, "Unknown commit object");
6537
6538         # choose format for commitdiff for merge
6539         if (! defined $hash_parent && @{$co{'parents'}} > 1) {
6540                 $hash_parent = '--cc';
6541         }
6542         # we need to prepare $formats_nav before almost any parameter munging
6543         my $formats_nav;
6544         if ($format eq 'html') {
6545                 $formats_nav =
6546                         $cgi->a({-href => href(action=>"commitdiff_plain", -replay=>1)},
6547                                 "raw");
6548                 if ($patch_max && @{$co{'parents'}} <= 1) {
6549                         $formats_nav .= " | " .
6550                                 $cgi->a({-href => href(action=>"patch", -replay=>1)},
6551                                         "patch");
6552                 }
6553
6554                 if (defined $hash_parent &&
6555                     $hash_parent ne '-c' && $hash_parent ne '--cc') {
6556                         # commitdiff with two commits given
6557                         my $hash_parent_short = $hash_parent;
6558                         if ($hash_parent =~ m/^[0-9a-fA-F]{40}$/) {
6559                                 $hash_parent_short = substr($hash_parent, 0, 7);
6560                         }
6561                         $formats_nav .=
6562                                 ' (from';
6563                         for (my $i = 0; $i < @{$co{'parents'}}; $i++) {
6564                                 if ($co{'parents'}[$i] eq $hash_parent) {
6565                                         $formats_nav .= ' parent ' . ($i+1);
6566                                         last;
6567                                 }
6568                         }
6569                         $formats_nav .= ': ' .
6570                                 $cgi->a({-href => href(action=>"commitdiff",
6571                                                        hash=>$hash_parent)},
6572                                         esc_html($hash_parent_short)) .
6573                                 ')';
6574                 } elsif (!$co{'parent'}) {
6575                         # --root commitdiff
6576                         $formats_nav .= ' (initial)';
6577                 } elsif (scalar @{$co{'parents'}} == 1) {
6578                         # single parent commit
6579                         $formats_nav .=
6580                                 ' (parent: ' .
6581                                 $cgi->a({-href => href(action=>"commitdiff",
6582                                                        hash=>$co{'parent'})},
6583                                         esc_html(substr($co{'parent'}, 0, 7))) .
6584                                 ')';
6585                 } else {
6586                         # merge commit
6587                         if ($hash_parent eq '--cc') {
6588                                 $formats_nav .= ' | ' .
6589                                         $cgi->a({-href => href(action=>"commitdiff",
6590                                                                hash=>$hash, hash_parent=>'-c')},
6591                                                 'combined');
6592                         } else { # $hash_parent eq '-c'
6593                                 $formats_nav .= ' | ' .
6594                                         $cgi->a({-href => href(action=>"commitdiff",
6595                                                                hash=>$hash, hash_parent=>'--cc')},
6596                                                 'compact');
6597                         }
6598                         $formats_nav .=
6599                                 ' (merge: ' .
6600                                 join(' ', map {
6601                                         $cgi->a({-href => href(action=>"commitdiff",
6602                                                                hash=>$_)},
6603                                                 esc_html(substr($_, 0, 7)));
6604                                 } @{$co{'parents'}} ) .
6605                                 ')';
6606                 }
6607         }
6608
6609         my $hash_parent_param = $hash_parent;
6610         if (!defined $hash_parent_param) {
6611                 # --cc for multiple parents, --root for parentless
6612                 $hash_parent_param =
6613                         @{$co{'parents'}} > 1 ? '--cc' : $co{'parent'} || '--root';
6614         }
6615
6616         # read commitdiff
6617         my $fd;
6618         my @difftree;
6619         if ($format eq 'html') {
6620                 open $fd, "-|", git_cmd(), "diff-tree", '-r', @diff_opts,
6621                         "--no-commit-id", "--patch-with-raw", "--full-index",
6622                         $hash_parent_param, $hash, "--"
6623                         or die_error(500, "Open git-diff-tree failed");
6624
6625                 while (my $line = <$fd>) {
6626                         chomp $line;
6627                         # empty line ends raw part of diff-tree output
6628                         last unless $line;
6629                         push @difftree, scalar parse_difftree_raw_line($line);
6630                 }
6631
6632         } elsif ($format eq 'plain') {
6633                 open $fd, "-|", git_cmd(), "diff-tree", '-r', @diff_opts,
6634                         '-p', $hash_parent_param, $hash, "--"
6635                         or die_error(500, "Open git-diff-tree failed");
6636         } elsif ($format eq 'patch') {
6637                 # For commit ranges, we limit the output to the number of
6638                 # patches specified in the 'patches' feature.
6639                 # For single commits, we limit the output to a single patch,
6640                 # diverging from the git-format-patch default.
6641                 my @commit_spec = ();
6642                 if ($hash_parent) {
6643                         if ($patch_max > 0) {
6644                                 push @commit_spec, "-$patch_max";
6645                         }
6646                         push @commit_spec, '-n', "$hash_parent..$hash";
6647                 } else {
6648                         if ($params{-single}) {
6649                                 push @commit_spec, '-1';
6650                         } else {
6651                                 if ($patch_max > 0) {
6652                                         push @commit_spec, "-$patch_max";
6653                                 }
6654                                 push @commit_spec, "-n";
6655                         }
6656                         push @commit_spec, '--root', $hash;
6657                 }
6658                 open $fd, "-|", git_cmd(), "format-patch", @diff_opts,
6659                         '--encoding=utf8', '--stdout', @commit_spec
6660                         or die_error(500, "Open git-format-patch failed");
6661         } else {
6662                 die_error(400, "Unknown commitdiff format");
6663         }
6664
6665         # non-textual hash id's can be cached
6666         my $expires;
6667         if ($hash =~ m/^[0-9a-fA-F]{40}$/) {
6668                 $expires = "+1d";
6669         }
6670
6671         # write commit message
6672         if ($format eq 'html') {
6673                 my $refs = git_get_references();
6674                 my $ref = format_ref_marker($refs, $co{'id'});
6675
6676                 git_header_html(undef, $expires);
6677                 git_print_page_nav('commitdiff','', $hash,$co{'tree'},$hash, $formats_nav);
6678                 git_print_header_div('commit', esc_html($co{'title'}) . $ref, $hash);
6679                 print "<div class=\"title_text\">\n" .
6680                       "<table class=\"object_header\">\n";
6681                 git_print_authorship_rows(\%co);
6682                 print "</table>".
6683                       "</div>\n";
6684                 print "<div class=\"page_body\">\n";
6685                 if (@{$co{'comment'}} > 1) {
6686                         print "<div class=\"log\">\n";
6687                         git_print_log($co{'comment'}, -final_empty_line=> 1, -remove_title => 1);
6688                         print "</div>\n"; # class="log"
6689                 }
6690
6691         } elsif ($format eq 'plain') {
6692                 my $refs = git_get_references("tags");
6693                 my $tagname = git_get_rev_name_tags($hash);
6694                 my $filename = basename($project) . "-$hash.patch";
6695
6696                 print $cgi->header(
6697                         -type => 'text/plain',
6698                         -charset => 'utf-8',
6699                         -expires => $expires,
6700                         -content_disposition => 'inline; filename="' . "$filename" . '"');
6701                 my %ad = parse_date($co{'author_epoch'}, $co{'author_tz'});
6702                 print "From: " . to_utf8($co{'author'}) . "\n";
6703                 print "Date: $ad{'rfc2822'} ($ad{'tz_local'})\n";
6704                 print "Subject: " . to_utf8($co{'title'}) . "\n";
6705
6706                 print "X-Git-Tag: $tagname\n" if $tagname;
6707                 print "X-Git-Url: " . $cgi->self_url() . "\n\n";
6708
6709                 foreach my $line (@{$co{'comment'}}) {
6710                         print to_utf8($line) . "\n";
6711                 }
6712                 print "---\n\n";
6713         } elsif ($format eq 'patch') {
6714                 my $filename = basename($project) . "-$hash.patch";
6715
6716                 print $cgi->header(
6717                         -type => 'text/plain',
6718                         -charset => 'utf-8',
6719                         -expires => $expires,
6720                         -content_disposition => 'inline; filename="' . "$filename" . '"');
6721         }
6722
6723         # write patch
6724         if ($format eq 'html') {
6725                 my $use_parents = !defined $hash_parent ||
6726                         $hash_parent eq '-c' || $hash_parent eq '--cc';
6727                 git_difftree_body(\@difftree, $hash,
6728                                   $use_parents ? @{$co{'parents'}} : $hash_parent);
6729                 print "<br/>\n";
6730
6731                 git_patchset_body($fd, \@difftree, $hash,
6732                                   $use_parents ? @{$co{'parents'}} : $hash_parent);
6733                 close $fd;
6734                 print "</div>\n"; # class="page_body"
6735                 git_footer_html();
6736
6737         } elsif ($format eq 'plain') {
6738                 local $/ = undef;
6739                 print <$fd>;
6740                 close $fd
6741                         or print "Reading git-diff-tree failed\n";
6742         } elsif ($format eq 'patch') {
6743                 local $/ = undef;
6744                 print <$fd>;
6745                 close $fd
6746                         or print "Reading git-format-patch failed\n";
6747         }
6748 }
6749
6750 sub git_commitdiff_plain {
6751         git_commitdiff(-format => 'plain');
6752 }
6753
6754 # format-patch-style patches
6755 sub git_patch {
6756         git_commitdiff(-format => 'patch', -single => 1);
6757 }
6758
6759 sub git_patches {
6760         git_commitdiff(-format => 'patch');
6761 }
6762
6763 sub git_history {
6764         git_log_generic('history', \&git_history_body,
6765                         $hash_base, $hash_parent_base,
6766                         $file_name, $hash);
6767 }
6768
6769 sub git_search {
6770         gitweb_check_feature('search') or die_error(403, "Search is disabled");
6771         if (!defined $searchtext) {
6772                 die_error(400, "Text field is empty");
6773         }
6774         if (!defined $hash) {
6775                 $hash = git_get_head_hash($project);
6776         }
6777         my %co = parse_commit($hash);
6778         if (!%co) {
6779                 die_error(404, "Unknown commit object");
6780         }
6781         if (!defined $page) {
6782                 $page = 0;
6783         }
6784
6785         $searchtype ||= 'commit';
6786         if ($searchtype eq 'pickaxe') {
6787                 # pickaxe may take all resources of your box and run for several minutes
6788                 # with every query - so decide by yourself how public you make this feature
6789                 gitweb_check_feature('pickaxe')
6790                     or die_error(403, "Pickaxe is disabled");
6791         }
6792         if ($searchtype eq 'grep') {
6793                 gitweb_check_feature('grep')
6794                     or die_error(403, "Grep is disabled");
6795         }
6796
6797         git_header_html();
6798
6799         if ($searchtype eq 'commit' or $searchtype eq 'author' or $searchtype eq 'committer') {
6800                 my $greptype;
6801                 if ($searchtype eq 'commit') {
6802                         $greptype = "--grep=";
6803                 } elsif ($searchtype eq 'author') {
6804                         $greptype = "--author=";
6805                 } elsif ($searchtype eq 'committer') {
6806                         $greptype = "--committer=";
6807                 }
6808                 $greptype .= $searchtext;
6809                 my @commitlist = parse_commits($hash, 101, (100 * $page), undef,
6810                                                $greptype, '--regexp-ignore-case',
6811                                                $search_use_regexp ? '--extended-regexp' : '--fixed-strings');
6812
6813                 my $paging_nav = '';
6814                 if ($page > 0) {
6815                         $paging_nav .=
6816                                 $cgi->a({-href => href(action=>"search", hash=>$hash,
6817                                                        searchtext=>$searchtext,
6818                                                        searchtype=>$searchtype)},
6819                                         "first");
6820                         $paging_nav .= " &sdot; " .
6821                                 $cgi->a({-href => href(-replay=>1, page=>$page-1),
6822                                          -accesskey => "p", -title => "Alt-p"}, "prev");
6823                 } else {
6824                         $paging_nav .= "first";
6825                         $paging_nav .= " &sdot; prev";
6826                 }
6827                 my $next_link = '';
6828                 if ($#commitlist >= 100) {
6829                         $next_link =
6830                                 $cgi->a({-href => href(-replay=>1, page=>$page+1),
6831                                          -accesskey => "n", -title => "Alt-n"}, "next");
6832                         $paging_nav .= " &sdot; $next_link";
6833                 } else {
6834                         $paging_nav .= " &sdot; next";
6835                 }
6836
6837                 git_print_page_nav('','', $hash,$co{'tree'},$hash, $paging_nav);
6838                 git_print_header_div('commit', esc_html($co{'title'}), $hash);
6839                 if ($page == 0 && !@commitlist) {
6840                         print "<p>No match.</p>\n";
6841                 } else {
6842                         git_search_grep_body(\@commitlist, 0, 99, $next_link);
6843                 }
6844         }
6845
6846         if ($searchtype eq 'pickaxe') {
6847                 git_print_page_nav('','', $hash,$co{'tree'},$hash);
6848                 git_print_header_div('commit', esc_html($co{'title'}), $hash);
6849
6850                 print "<table class=\"pickaxe search\">\n";
6851                 my $alternate = 1;
6852                 local $/ = "\n";
6853                 open my $fd, '-|', git_cmd(), '--no-pager', 'log', @diff_opts,
6854                         '--pretty=format:%H', '--no-abbrev', '--raw', "-S$searchtext",
6855                         ($search_use_regexp ? '--pickaxe-regex' : ());
6856                 undef %co;
6857                 my @files;
6858                 while (my $line = <$fd>) {
6859                         chomp $line;
6860                         next unless $line;
6861
6862                         my %set = parse_difftree_raw_line($line);
6863                         if (defined $set{'commit'}) {
6864                                 # finish previous commit
6865                                 if (%co) {
6866                                         print "</td>\n" .
6867                                               "<td class=\"link\">" .
6868                                               $cgi->a({-href => href(action=>"commit", hash=>$co{'id'})}, "commit") .
6869                                               " | " .
6870                                               $cgi->a({-href => href(action=>"tree", hash=>$co{'tree'}, hash_base=>$co{'id'})}, "tree");
6871                                         print "</td>\n" .
6872                                               "</tr>\n";
6873                                 }
6874
6875                                 if ($alternate) {
6876                                         print "<tr class=\"dark\">\n";
6877                                 } else {
6878                                         print "<tr class=\"light\">\n";
6879                                 }
6880                                 $alternate ^= 1;
6881                                 %co = parse_commit($set{'commit'});
6882                                 my $author = chop_and_escape_str($co{'author_name'}, 15, 5);
6883                                 print "<td title=\"$co{'age_string_age'}\"><i>$co{'age_string_date'}</i></td>\n" .
6884                                       "<td><i>$author</i></td>\n" .
6885                                       "<td>" .
6886                                       $cgi->a({-href => href(action=>"commit", hash=>$co{'id'}),
6887                                               -class => "list subject"},
6888                                               chop_and_escape_str($co{'title'}, 50) . "<br/>");
6889                         } elsif (defined $set{'to_id'}) {
6890                                 next if ($set{'to_id'} =~ m/^0{40}$/);
6891
6892                                 print $cgi->a({-href => href(action=>"blob", hash_base=>$co{'id'},
6893                                                              hash=>$set{'to_id'}, file_name=>$set{'to_file'}),
6894                                               -class => "list"},
6895                                               "<span class=\"match\">" . esc_path($set{'file'}) . "</span>") .
6896                                       "<br/>\n";
6897                         }
6898                 }
6899                 close $fd;
6900
6901                 # finish last commit (warning: repetition!)
6902                 if (%co) {
6903                         print "</td>\n" .
6904                               "<td class=\"link\">" .
6905                               $cgi->a({-href => href(action=>"commit", hash=>$co{'id'})}, "commit") .
6906                               " | " .
6907                               $cgi->a({-href => href(action=>"tree", hash=>$co{'tree'}, hash_base=>$co{'id'})}, "tree");
6908                         print "</td>\n" .
6909                               "</tr>\n";
6910                 }
6911
6912                 print "</table>\n";
6913         }
6914
6915         if ($searchtype eq 'grep') {
6916                 git_print_page_nav('','', $hash,$co{'tree'},$hash);
6917                 git_print_header_div('commit', esc_html($co{'title'}), $hash);
6918
6919                 print "<table class=\"grep_search\">\n";
6920                 my $alternate = 1;
6921                 my $matches = 0;
6922                 local $/ = "\n";
6923                 open my $fd, "-|", git_cmd(), 'grep', '-n',
6924                         $search_use_regexp ? ('-E', '-i') : '-F',
6925                         $searchtext, $co{'tree'};
6926                 my $lastfile = '';
6927                 while (my $line = <$fd>) {
6928                         chomp $line;
6929                         my ($file, $lno, $ltext, $binary);
6930                         last if ($matches++ > 1000);
6931                         if ($line =~ /^Binary file (.+) matches$/) {
6932                                 $file = $1;
6933                                 $binary = 1;
6934                         } else {
6935                                 (undef, $file, $lno, $ltext) = split(/:/, $line, 4);
6936                         }
6937                         if ($file ne $lastfile) {
6938                                 $lastfile and print "</td></tr>\n";
6939                                 if ($alternate++) {
6940                                         print "<tr class=\"dark\">\n";
6941                                 } else {
6942                                         print "<tr class=\"light\">\n";
6943                                 }
6944                                 print "<td class=\"list\">".
6945                                         $cgi->a({-href => href(action=>"blob", hash=>$co{'hash'},
6946                                                                file_name=>"$file"),
6947                                                 -class => "list"}, esc_path($file));
6948                                 print "</td><td>\n";
6949                                 $lastfile = $file;
6950                         }
6951                         if ($binary) {
6952                                 print "<div class=\"binary\">Binary file</div>\n";
6953                         } else {
6954                                 $ltext = untabify($ltext);
6955                                 if ($ltext =~ m/^(.*)($search_regexp)(.*)$/i) {
6956                                         $ltext = esc_html($1, -nbsp=>1);
6957                                         $ltext .= '<span class="match">';
6958                                         $ltext .= esc_html($2, -nbsp=>1);
6959                                         $ltext .= '</span>';
6960                                         $ltext .= esc_html($3, -nbsp=>1);
6961                                 } else {
6962                                         $ltext = esc_html($ltext, -nbsp=>1);
6963                                 }
6964                                 print "<div class=\"pre\">" .
6965                                         $cgi->a({-href => href(action=>"blob", hash=>$co{'hash'},
6966                                                                file_name=>"$file").'#l'.$lno,
6967                                                 -class => "linenr"}, sprintf('%4i', $lno))
6968                                         . ' ' .  $ltext . "</div>\n";
6969                         }
6970                 }
6971                 if ($lastfile) {
6972                         print "</td></tr>\n";
6973                         if ($matches > 1000) {
6974                                 print "<div class=\"diff nodifferences\">Too many matches, listing trimmed</div>\n";
6975                         }
6976                 } else {
6977                         print "<div class=\"diff nodifferences\">No matches found</div>\n";
6978                 }
6979                 close $fd;
6980
6981                 print "</table>\n";
6982         }
6983         git_footer_html();
6984 }
6985
6986 sub git_search_help {
6987         git_header_html();
6988         git_print_page_nav('','', $hash,$hash,$hash);
6989         print <<EOT;
6990 <p><strong>Pattern</strong> is by default a normal string that is matched precisely (but without
6991 regard to case, except in the case of pickaxe). However, when you check the <em>re</em> checkbox,
6992 the pattern entered is recognized as the POSIX extended
6993 <a href="http://en.wikipedia.org/wiki/Regular_expression">regular expression</a> (also case
6994 insensitive).</p>
6995 <dl>
6996 <dt><b>commit</b></dt>
6997 <dd>The commit messages and authorship information will be scanned for the given pattern.</dd>
6998 EOT
6999         my $have_grep = gitweb_check_feature('grep');
7000         if ($have_grep) {
7001                 print <<EOT;
7002 <dt><b>grep</b></dt>
7003 <dd>All files in the currently selected tree (HEAD unless you are explicitly browsing
7004     a different one) are searched for the given pattern. On large trees, this search can take
7005 a while and put some strain on the server, so please use it with some consideration. Note that
7006 due to git-grep peculiarity, currently if regexp mode is turned off, the matches are
7007 case-sensitive.</dd>
7008 EOT
7009         }
7010         print <<EOT;
7011 <dt><b>author</b></dt>
7012 <dd>Name and e-mail of the change author and date of birth of the patch will be scanned for the given pattern.</dd>
7013 <dt><b>committer</b></dt>
7014 <dd>Name and e-mail of the committer and date of commit will be scanned for the given pattern.</dd>
7015 EOT
7016         my $have_pickaxe = gitweb_check_feature('pickaxe');
7017         if ($have_pickaxe) {
7018                 print <<EOT;
7019 <dt><b>pickaxe</b></dt>
7020 <dd>All commits that caused the string to appear or disappear from any file (changes that
7021 added, removed or "modified" the string) will be listed. This search can take a while and
7022 takes a lot of strain on the server, so please use it wisely. Note that since you may be
7023 interested even in changes just changing the case as well, this search is case sensitive.</dd>
7024 EOT
7025         }
7026         print "</dl>\n";
7027         git_footer_html();
7028 }
7029
7030 sub git_shortlog {
7031         git_log_generic('shortlog', \&git_shortlog_body,
7032                         $hash, $hash_parent);
7033 }
7034
7035 ## ......................................................................
7036 ## feeds (RSS, Atom; OPML)
7037
7038 sub git_feed {
7039         my $format = shift || 'atom';
7040         my $have_blame = gitweb_check_feature('blame');
7041
7042         # Atom: http://www.atomenabled.org/developers/syndication/
7043         # RSS:  http://www.notestips.com/80256B3A007F2692/1/NAMO5P9UPQ
7044         if ($format ne 'rss' && $format ne 'atom') {
7045                 die_error(400, "Unknown web feed format");
7046         }
7047
7048         # log/feed of current (HEAD) branch, log of given branch, history of file/directory
7049         my $head = $hash || 'HEAD';
7050         my @commitlist = parse_commits($head, 150, 0, $file_name);
7051
7052         my %latest_commit;
7053         my %latest_date;
7054         my $content_type = "application/$format+xml";
7055         if (defined $cgi->http('HTTP_ACCEPT') &&
7056                  $cgi->Accept('text/xml') > $cgi->Accept($content_type)) {
7057                 # browser (feed reader) prefers text/xml
7058                 $content_type = 'text/xml';
7059         }
7060         if (defined($commitlist[0])) {
7061                 %latest_commit = %{$commitlist[0]};
7062                 my $latest_epoch = $latest_commit{'committer_epoch'};
7063                 %latest_date   = parse_date($latest_epoch);
7064                 my $if_modified = $cgi->http('IF_MODIFIED_SINCE');
7065                 if (defined $if_modified) {
7066                         my $since;
7067                         if (eval { require HTTP::Date; 1; }) {
7068                                 $since = HTTP::Date::str2time($if_modified);
7069                         } elsif (eval { require Time::ParseDate; 1; }) {
7070                                 $since = Time::ParseDate::parsedate($if_modified, GMT => 1);
7071                         }
7072                         if (defined $since && $latest_epoch <= $since) {
7073                                 print $cgi->header(
7074                                         -type => $content_type,
7075                                         -charset => 'utf-8',
7076                                         -last_modified => $latest_date{'rfc2822'},
7077                                         -status => '304 Not Modified');
7078                                 return;
7079                         }
7080                 }
7081                 print $cgi->header(
7082                         -type => $content_type,
7083                         -charset => 'utf-8',
7084                         -last_modified => $latest_date{'rfc2822'});
7085         } else {
7086                 print $cgi->header(
7087                         -type => $content_type,
7088                         -charset => 'utf-8');
7089         }
7090
7091         # Optimization: skip generating the body if client asks only
7092         # for Last-Modified date.
7093         return if ($cgi->request_method() eq 'HEAD');
7094
7095         # header variables
7096         my $title = "$site_name - $project/$action";
7097         my $feed_type = 'log';
7098         if (defined $hash) {
7099                 $title .= " - '$hash'";
7100                 $feed_type = 'branch log';
7101                 if (defined $file_name) {
7102                         $title .= " :: $file_name";
7103                         $feed_type = 'history';
7104                 }
7105         } elsif (defined $file_name) {
7106                 $title .= " - $file_name";
7107                 $feed_type = 'history';
7108         }
7109         $title .= " $feed_type";
7110         my $descr = git_get_project_description($project);
7111         if (defined $descr) {
7112                 $descr = esc_html($descr);
7113         } else {
7114                 $descr = "$project " .
7115                          ($format eq 'rss' ? 'RSS' : 'Atom') .
7116                          " feed";
7117         }
7118         my $owner = git_get_project_owner($project);
7119         $owner = esc_html($owner);
7120
7121         #header
7122         my $alt_url;
7123         if (defined $file_name) {
7124                 $alt_url = href(-full=>1, action=>"history", hash=>$hash, file_name=>$file_name);
7125         } elsif (defined $hash) {
7126                 $alt_url = href(-full=>1, action=>"log", hash=>$hash);
7127         } else {
7128                 $alt_url = href(-full=>1, action=>"summary");
7129         }
7130         print qq!<?xml version="1.0" encoding="utf-8"?>\n!;
7131         if ($format eq 'rss') {
7132                 print <<XML;
7133 <rss version="2.0" xmlns:content="http://purl.org/rss/1.0/modules/content/">
7134 <channel>
7135 XML
7136                 print "<title>$title</title>\n" .
7137                       "<link>$alt_url</link>\n" .
7138                       "<description>$descr</description>\n" .
7139                       "<language>en</language>\n" .
7140                       # project owner is responsible for 'editorial' content
7141                       "<managingEditor>$owner</managingEditor>\n";
7142                 if (defined $logo || defined $favicon) {
7143                         # prefer the logo to the favicon, since RSS
7144                         # doesn't allow both
7145                         my $img = esc_url($logo || $favicon);
7146                         print "<image>\n" .
7147                               "<url>$img</url>\n" .
7148                               "<title>$title</title>\n" .
7149                               "<link>$alt_url</link>\n" .
7150                               "</image>\n";
7151                 }
7152                 if (%latest_date) {
7153                         print "<pubDate>$latest_date{'rfc2822'}</pubDate>\n";
7154                         print "<lastBuildDate>$latest_date{'rfc2822'}</lastBuildDate>\n";
7155                 }
7156                 print "<generator>gitweb v.$version/$git_version</generator>\n";
7157         } elsif ($format eq 'atom') {
7158                 print <<XML;
7159 <feed xmlns="http://www.w3.org/2005/Atom">
7160 XML
7161                 print "<title>$title</title>\n" .
7162                       "<subtitle>$descr</subtitle>\n" .
7163                       '<link rel="alternate" type="text/html" href="' .
7164                       $alt_url . '" />' . "\n" .
7165                       '<link rel="self" type="' . $content_type . '" href="' .
7166                       $cgi->self_url() . '" />' . "\n" .
7167                       "<id>" . href(-full=>1) . "</id>\n" .
7168                       # use project owner for feed author
7169                       "<author><name>$owner</name></author>\n";
7170                 if (defined $favicon) {
7171                         print "<icon>" . esc_url($favicon) . "</icon>\n";
7172                 }
7173                 if (defined $logo) {
7174                         # not twice as wide as tall: 72 x 27 pixels
7175                         print "<logo>" . esc_url($logo) . "</logo>\n";
7176                 }
7177                 if (! %latest_date) {
7178                         # dummy date to keep the feed valid until commits trickle in:
7179                         print "<updated>1970-01-01T00:00:00Z</updated>\n";
7180                 } else {
7181                         print "<updated>$latest_date{'iso-8601'}</updated>\n";
7182                 }
7183                 print "<generator version='$version/$git_version'>gitweb</generator>\n";
7184         }
7185
7186         # contents
7187         for (my $i = 0; $i <= $#commitlist; $i++) {
7188                 my %co = %{$commitlist[$i]};
7189                 my $commit = $co{'id'};
7190                 # we read 150, we always show 30 and the ones more recent than 48 hours
7191                 if (($i >= 20) && ((time - $co{'author_epoch'}) > 48*60*60)) {
7192                         last;
7193                 }
7194                 my %cd = parse_date($co{'author_epoch'});
7195
7196                 # get list of changed files
7197                 open my $fd, "-|", git_cmd(), "diff-tree", '-r', @diff_opts,
7198                         $co{'parent'} || "--root",
7199                         $co{'id'}, "--", (defined $file_name ? $file_name : ())
7200                         or next;
7201                 my @difftree = map { chomp; $_ } <$fd>;
7202                 close $fd
7203                         or next;
7204
7205                 # print element (entry, item)
7206                 my $co_url = href(-full=>1, action=>"commitdiff", hash=>$commit);
7207                 if ($format eq 'rss') {
7208                         print "<item>\n" .
7209                               "<title>" . esc_html($co{'title'}) . "</title>\n" .
7210                               "<author>" . esc_html($co{'author'}) . "</author>\n" .
7211                               "<pubDate>$cd{'rfc2822'}</pubDate>\n" .
7212                               "<guid isPermaLink=\"true\">$co_url</guid>\n" .
7213                               "<link>$co_url</link>\n" .
7214                               "<description>" . esc_html($co{'title'}) . "</description>\n" .
7215                               "<content:encoded>" .
7216                               "<![CDATA[\n";
7217                 } elsif ($format eq 'atom') {
7218                         print "<entry>\n" .
7219                               "<title type=\"html\">" . esc_html($co{'title'}) . "</title>\n" .
7220                               "<updated>$cd{'iso-8601'}</updated>\n" .
7221                               "<author>\n" .
7222                               "  <name>" . esc_html($co{'author_name'}) . "</name>\n";
7223                         if ($co{'author_email'}) {
7224                                 print "  <email>" . esc_html($co{'author_email'}) . "</email>\n";
7225                         }
7226                         print "</author>\n" .
7227                               # use committer for contributor
7228                               "<contributor>\n" .
7229                               "  <name>" . esc_html($co{'committer_name'}) . "</name>\n";
7230                         if ($co{'committer_email'}) {
7231                                 print "  <email>" . esc_html($co{'committer_email'}) . "</email>\n";
7232                         }
7233                         print "</contributor>\n" .
7234                               "<published>$cd{'iso-8601'}</published>\n" .
7235                               "<link rel=\"alternate\" type=\"text/html\" href=\"$co_url\" />\n" .
7236                               "<id>$co_url</id>\n" .
7237                               "<content type=\"xhtml\" xml:base=\"" . esc_url($my_url) . "\">\n" .
7238                               "<div xmlns=\"http://www.w3.org/1999/xhtml\">\n";
7239                 }
7240                 my $comment = $co{'comment'};
7241                 print "<pre>\n";
7242                 foreach my $line (@$comment) {
7243                         $line = esc_html($line);
7244                         print "$line\n";
7245                 }
7246                 print "</pre><ul>\n";
7247                 foreach my $difftree_line (@difftree) {
7248                         my %difftree = parse_difftree_raw_line($difftree_line);
7249                         next if !$difftree{'from_id'};
7250
7251                         my $file = $difftree{'file'} || $difftree{'to_file'};
7252
7253                         print "<li>" .
7254                               "[" .
7255                               $cgi->a({-href => href(-full=>1, action=>"blobdiff",
7256                                                      hash=>$difftree{'to_id'}, hash_parent=>$difftree{'from_id'},
7257                                                      hash_base=>$co{'id'}, hash_parent_base=>$co{'parent'},
7258                                                      file_name=>$file, file_parent=>$difftree{'from_file'}),
7259                                       -title => "diff"}, 'D');
7260                         if ($have_blame) {
7261                                 print $cgi->a({-href => href(-full=>1, action=>"blame",
7262                                                              file_name=>$file, hash_base=>$commit),
7263                                               -title => "blame"}, 'B');
7264                         }
7265                         # if this is not a feed of a file history
7266                         if (!defined $file_name || $file_name ne $file) {
7267                                 print $cgi->a({-href => href(-full=>1, action=>"history",
7268                                                              file_name=>$file, hash=>$commit),
7269                                               -title => "history"}, 'H');
7270                         }
7271                         $file = esc_path($file);
7272                         print "] ".
7273                               "$file</li>\n";
7274                 }
7275                 if ($format eq 'rss') {
7276                         print "</ul>]]>\n" .
7277                               "</content:encoded>\n" .
7278                               "</item>\n";
7279                 } elsif ($format eq 'atom') {
7280                         print "</ul>\n</div>\n" .
7281                               "</content>\n" .
7282                               "</entry>\n";
7283                 }
7284         }
7285
7286         # end of feed
7287         if ($format eq 'rss') {
7288                 print "</channel>\n</rss>\n";
7289         } elsif ($format eq 'atom') {
7290                 print "</feed>\n";
7291         }
7292 }
7293
7294 sub git_rss {
7295         git_feed('rss');
7296 }
7297
7298 sub git_atom {
7299         git_feed('atom');
7300 }
7301
7302 sub git_opml {
7303         my @list = git_get_projects_list();
7304
7305         print $cgi->header(
7306                 -type => 'text/xml',
7307                 -charset => 'utf-8',
7308                 -content_disposition => 'inline; filename="opml.xml"');
7309
7310         print <<XML;
7311 <?xml version="1.0" encoding="utf-8"?>
7312 <opml version="1.0">
7313 <head>
7314   <title>$site_name OPML Export</title>
7315 </head>
7316 <body>
7317 <outline text="git RSS feeds">
7318 XML
7319
7320         foreach my $pr (@list) {
7321                 my %proj = %$pr;
7322                 my $head = git_get_head_hash($proj{'path'});
7323                 if (!defined $head) {
7324                         next;
7325                 }
7326                 $git_dir = "$projectroot/$proj{'path'}";
7327                 my %co = parse_commit($head);
7328                 if (!%co) {
7329                         next;
7330                 }
7331
7332                 my $path = esc_html(chop_str($proj{'path'}, 25, 5));
7333                 my $rss  = href('project' => $proj{'path'}, 'action' => 'rss', -full => 1);
7334                 my $html = href('project' => $proj{'path'}, 'action' => 'summary', -full => 1);
7335                 print "<outline type=\"rss\" text=\"$path\" title=\"$path\" xmlUrl=\"$rss\" htmlUrl=\"$html\"/>\n";
7336         }
7337         print <<XML;
7338 </outline>
7339 </body>
7340 </opml>
7341 XML
7342 }