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         open $fd, quote_command(git_cmd(), "cat-file", "blob", $hash)." | ".
3470                   quote_command($highlight_bin).
3471                   " --fragment --syntax $syntax |"
3472                 or die_error(500, "Couldn't open file or run syntax highlighter");
3473         return $fd;
3474 }
3475
3476 ## ======================================================================
3477 ## functions printing HTML: header, footer, error page
3478
3479 sub get_page_title {
3480         my $title = to_utf8($site_name);
3481
3482         return $title unless (defined $project);
3483         $title .= " - " . to_utf8($project);
3484
3485         return $title unless (defined $action);
3486         $title .= "/$action"; # $action is US-ASCII (7bit ASCII)
3487
3488         return $title unless (defined $file_name);
3489         $title .= " - " . esc_path($file_name);
3490         if ($action eq "tree" && $file_name !~ m|/$|) {
3491                 $title .= "/";
3492         }
3493
3494         return $title;
3495 }
3496
3497 sub print_feed_meta {
3498         if (defined $project) {
3499                 my %href_params = get_feed_info();
3500                 if (!exists $href_params{'-title'}) {
3501                         $href_params{'-title'} = 'log';
3502                 }
3503
3504                 foreach my $format qw(RSS Atom) {
3505                         my $type = lc($format);
3506                         my %link_attr = (
3507                                 '-rel' => 'alternate',
3508                                 '-title' => esc_attr("$project - $href_params{'-title'} - $format feed"),
3509                                 '-type' => "application/$type+xml"
3510                         );
3511
3512                         $href_params{'action'} = $type;
3513                         $link_attr{'-href'} = href(%href_params);
3514                         print "<link ".
3515                               "rel=\"$link_attr{'-rel'}\" ".
3516                               "title=\"$link_attr{'-title'}\" ".
3517                               "href=\"$link_attr{'-href'}\" ".
3518                               "type=\"$link_attr{'-type'}\" ".
3519                               "/>\n";
3520
3521                         $href_params{'extra_options'} = '--no-merges';
3522                         $link_attr{'-href'} = href(%href_params);
3523                         $link_attr{'-title'} .= ' (no merges)';
3524                         print "<link ".
3525                               "rel=\"$link_attr{'-rel'}\" ".
3526                               "title=\"$link_attr{'-title'}\" ".
3527                               "href=\"$link_attr{'-href'}\" ".
3528                               "type=\"$link_attr{'-type'}\" ".
3529                               "/>\n";
3530                 }
3531
3532         } else {
3533                 printf('<link rel="alternate" title="%s projects list" '.
3534                        'href="%s" type="text/plain; charset=utf-8" />'."\n",
3535                        esc_attr($site_name), href(project=>undef, action=>"project_index"));
3536                 printf('<link rel="alternate" title="%s projects feeds" '.
3537                        'href="%s" type="text/x-opml" />'."\n",
3538                        esc_attr($site_name), href(project=>undef, action=>"opml"));
3539         }
3540 }
3541
3542 sub git_header_html {
3543         my $status = shift || "200 OK";
3544         my $expires = shift;
3545         my %opts = @_;
3546
3547         my $title = get_page_title();
3548         my $content_type;
3549         # require explicit support from the UA if we are to send the page as
3550         # 'application/xhtml+xml', otherwise send it as plain old 'text/html'.
3551         # we have to do this because MSIE sometimes globs '*/*', pretending to
3552         # support xhtml+xml but choking when it gets what it asked for.
3553         if (defined $cgi->http('HTTP_ACCEPT') &&
3554             $cgi->http('HTTP_ACCEPT') =~ m/(,|;|\s|^)application\/xhtml\+xml(,|;|\s|$)/ &&
3555             $cgi->Accept('application/xhtml+xml') != 0) {
3556                 $content_type = 'application/xhtml+xml';
3557         } else {
3558                 $content_type = 'text/html';
3559         }
3560         print $cgi->header(-type=>$content_type, -charset => 'utf-8',
3561                            -status=> $status, -expires => $expires)
3562                 unless ($opts{'-no_http_header'});
3563         my $mod_perl_version = $ENV{'MOD_PERL'} ? " $ENV{'MOD_PERL'}" : '';
3564         print <<EOF;
3565 <?xml version="1.0" encoding="utf-8"?>
3566 <!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Strict//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-strict.dtd">
3567 <html xmlns="http://www.w3.org/1999/xhtml" xml:lang="en-US" lang="en-US">
3568 <!-- git web interface version $version, (C) 2005-2006, Kay Sievers <kay.sievers\@vrfy.org>, Christian Gierke -->
3569 <!-- git core binaries version $git_version -->
3570 <head>
3571 <meta http-equiv="content-type" content="$content_type; charset=utf-8"/>
3572 <meta name="generator" content="gitweb/$version git/$git_version$mod_perl_version"/>
3573 <meta name="robots" content="index, nofollow"/>
3574 <title>$title</title>
3575 EOF
3576         # the stylesheet, favicon etc urls won't work correctly with path_info
3577         # unless we set the appropriate base URL
3578         if ($ENV{'PATH_INFO'}) {
3579                 print "<base href=\"".esc_url($base_url)."\" />\n";
3580         }
3581         # print out each stylesheet that exist, providing backwards capability
3582         # for those people who defined $stylesheet in a config file
3583         if (defined $stylesheet) {
3584                 print '<link rel="stylesheet" type="text/css" href="'.esc_url($stylesheet).'"/>'."\n";
3585         } else {
3586                 foreach my $stylesheet (@stylesheets) {
3587                         next unless $stylesheet;
3588                         print '<link rel="stylesheet" type="text/css" href="'.esc_url($stylesheet).'"/>'."\n";
3589                 }
3590         }
3591         print_feed_meta()
3592                 if ($status eq '200 OK');
3593         if (defined $favicon) {
3594                 print qq(<link rel="shortcut icon" href=").esc_url($favicon).qq(" type="image/png" />\n);
3595         }
3596
3597         print "</head>\n" .
3598               "<body>\n";
3599
3600         if (defined $site_header && -f $site_header) {
3601                 insert_file($site_header);
3602         }
3603
3604         print "<div class=\"page_header\">\n";
3605         if (defined $logo) {
3606                 print $cgi->a({-href => esc_url($logo_url),
3607                                -title => $logo_label},
3608                               $cgi->img({-src => esc_url($logo),
3609                                          -width => 72, -height => 27,
3610                                          -alt => "git",
3611                                          -class => "logo"}));
3612         }
3613         print $cgi->a({-href => esc_url($home_link)}, $home_link_str) . " / ";
3614         if (defined $project) {
3615                 print $cgi->a({-href => href(action=>"summary")}, esc_html($project));
3616                 if (defined $action) {
3617                         my $action_print = $action ;
3618                         if (defined $opts{-action_extra}) {
3619                                 $action_print = $cgi->a({-href => href(action=>$action)},
3620                                         $action);
3621                         }
3622                         print " / $action_print";
3623                 }
3624                 if (defined $opts{-action_extra}) {
3625                         print " / $opts{-action_extra}";
3626                 }
3627                 print "\n";
3628         }
3629         print "</div>\n";
3630
3631         my $have_search = gitweb_check_feature('search');
3632         if (defined $project && $have_search) {
3633                 if (!defined $searchtext) {
3634                         $searchtext = "";
3635                 }
3636                 my $search_hash;
3637                 if (defined $hash_base) {
3638                         $search_hash = $hash_base;
3639                 } elsif (defined $hash) {
3640                         $search_hash = $hash;
3641                 } else {
3642                         $search_hash = "HEAD";
3643                 }
3644                 my $action = $my_uri;
3645                 my $use_pathinfo = gitweb_check_feature('pathinfo');
3646                 if ($use_pathinfo) {
3647                         $action .= "/".esc_url($project);
3648                 }
3649                 print $cgi->startform(-method => "get", -action => $action) .
3650                       "<div class=\"search\">\n" .
3651                       (!$use_pathinfo &&
3652                       $cgi->input({-name=>"p", -value=>$project, -type=>"hidden"}) . "\n") .
3653                       $cgi->input({-name=>"a", -value=>"search", -type=>"hidden"}) . "\n" .
3654                       $cgi->input({-name=>"h", -value=>$search_hash, -type=>"hidden"}) . "\n" .
3655                       $cgi->popup_menu(-name => 'st', -default => 'commit',
3656                                        -values => ['commit', 'grep', 'author', 'committer', 'pickaxe']) .
3657                       $cgi->sup($cgi->a({-href => href(action=>"search_help")}, "?")) .
3658                       " search:\n",
3659                       $cgi->textfield(-name => "s", -value => $searchtext) . "\n" .
3660                       "<span title=\"Extended regular expression\">" .
3661                       $cgi->checkbox(-name => 'sr', -value => 1, -label => 're',
3662                                      -checked => $search_use_regexp) .
3663                       "</span>" .
3664                       "</div>" .
3665                       $cgi->end_form() . "\n";
3666         }
3667 }
3668
3669 sub git_footer_html {
3670         my $feed_class = 'rss_logo';
3671
3672         print "<div class=\"page_footer\">\n";
3673         if (defined $project) {
3674                 my $descr = git_get_project_description($project);
3675                 if (defined $descr) {
3676                         print "<div class=\"page_footer_text\">" . esc_html($descr) . "</div>\n";
3677                 }
3678
3679                 my %href_params = get_feed_info();
3680                 if (!%href_params) {
3681                         $feed_class .= ' generic';
3682                 }
3683                 $href_params{'-title'} ||= 'log';
3684
3685                 foreach my $format qw(RSS Atom) {
3686                         $href_params{'action'} = lc($format);
3687                         print $cgi->a({-href => href(%href_params),
3688                                       -title => "$href_params{'-title'} $format feed",
3689                                       -class => $feed_class}, $format)."\n";
3690                 }
3691
3692         } else {
3693                 print $cgi->a({-href => href(project=>undef, action=>"opml"),
3694                               -class => $feed_class}, "OPML") . " ";
3695                 print $cgi->a({-href => href(project=>undef, action=>"project_index"),
3696                               -class => $feed_class}, "TXT") . "\n";
3697         }
3698         print "</div>\n"; # class="page_footer"
3699
3700         if (defined $t0 && gitweb_check_feature('timed')) {
3701                 print "<div id=\"generating_info\">\n";
3702                 print 'This page took '.
3703                       '<span id="generating_time" class="time_span">'.
3704                       tv_interval($t0, [ gettimeofday() ]).
3705                       ' seconds </span>'.
3706                       ' and '.
3707                       '<span id="generating_cmd">'.
3708                       $number_of_git_cmds.
3709                       '</span> git commands '.
3710                       " to generate.\n";
3711                 print "</div>\n"; # class="page_footer"
3712         }
3713
3714         if (defined $site_footer && -f $site_footer) {
3715                 insert_file($site_footer);
3716         }
3717
3718         print qq!<script type="text/javascript" src="!.esc_url($javascript).qq!"></script>\n!;
3719         if (defined $action &&
3720             $action eq 'blame_incremental') {
3721                 print qq!<script type="text/javascript">\n!.
3722                       qq!startBlame("!. href(action=>"blame_data", -replay=>1) .qq!",\n!.
3723                       qq!           "!. href() .qq!");\n!.
3724                       qq!</script>\n!;
3725         } elsif (gitweb_check_feature('javascript-actions')) {
3726                 print qq!<script type="text/javascript">\n!.
3727                       qq!window.onload = fixLinks;\n!.
3728                       qq!</script>\n!;
3729         }
3730
3731         print "</body>\n" .
3732               "</html>";
3733 }
3734
3735 # die_error(<http_status_code>, <error_message>[, <detailed_html_description>])
3736 # Example: die_error(404, 'Hash not found')
3737 # By convention, use the following status codes (as defined in RFC 2616):
3738 # 400: Invalid or missing CGI parameters, or
3739 #      requested object exists but has wrong type.
3740 # 403: Requested feature (like "pickaxe" or "snapshot") not enabled on
3741 #      this server or project.
3742 # 404: Requested object/revision/project doesn't exist.
3743 # 500: The server isn't configured properly, or
3744 #      an internal error occurred (e.g. failed assertions caused by bugs), or
3745 #      an unknown error occurred (e.g. the git binary died unexpectedly).
3746 # 503: The server is currently unavailable (because it is overloaded,
3747 #      or down for maintenance).  Generally, this is a temporary state.
3748 sub die_error {
3749         my $status = shift || 500;
3750         my $error = esc_html(shift) || "Internal Server Error";
3751         my $extra = shift;
3752         my %opts = @_;
3753
3754         my %http_responses = (
3755                 400 => '400 Bad Request',
3756                 403 => '403 Forbidden',
3757                 404 => '404 Not Found',
3758                 500 => '500 Internal Server Error',
3759                 503 => '503 Service Unavailable',
3760         );
3761         git_header_html($http_responses{$status}, undef, %opts);
3762         print <<EOF;
3763 <div class="page_body">
3764 <br /><br />
3765 $status - $error
3766 <br />
3767 EOF
3768         if (defined $extra) {
3769                 print "<hr />\n" .
3770                       "$extra\n";
3771         }
3772         print "</div>\n";
3773
3774         git_footer_html();
3775         goto DONE_GITWEB
3776                 unless ($opts{'-error_handler'});
3777 }
3778
3779 ## ----------------------------------------------------------------------
3780 ## functions printing or outputting HTML: navigation
3781
3782 sub git_print_page_nav {
3783         my ($current, $suppress, $head, $treehead, $treebase, $extra) = @_;
3784         $extra = '' if !defined $extra; # pager or formats
3785
3786         my @navs = qw(summary shortlog log commit commitdiff tree);
3787         if ($suppress) {
3788                 @navs = grep { $_ ne $suppress } @navs;
3789         }
3790
3791         my %arg = map { $_ => {action=>$_} } @navs;
3792         if (defined $head) {
3793                 for (qw(commit commitdiff)) {
3794                         $arg{$_}{'hash'} = $head;
3795                 }
3796                 if ($current =~ m/^(tree | log | shortlog | commit | commitdiff | search)$/x) {
3797                         for (qw(shortlog log)) {
3798                                 $arg{$_}{'hash'} = $head;
3799                         }
3800                 }
3801         }
3802
3803         $arg{'tree'}{'hash'} = $treehead if defined $treehead;
3804         $arg{'tree'}{'hash_base'} = $treebase if defined $treebase;
3805
3806         my @actions = gitweb_get_feature('actions');
3807         my %repl = (
3808                 '%' => '%',
3809                 'n' => $project,         # project name
3810                 'f' => $git_dir,         # project path within filesystem
3811                 'h' => $treehead || '',  # current hash ('h' parameter)
3812                 'b' => $treebase || '',  # hash base ('hb' parameter)
3813         );
3814         while (@actions) {
3815                 my ($label, $link, $pos) = splice(@actions,0,3);
3816                 # insert
3817                 @navs = map { $_ eq $pos ? ($_, $label) : $_ } @navs;
3818                 # munch munch
3819                 $link =~ s/%([%nfhb])/$repl{$1}/g;
3820                 $arg{$label}{'_href'} = $link;
3821         }
3822
3823         print "<div class=\"page_nav\">\n" .
3824                 (join " | ",
3825                  map { $_ eq $current ?
3826                        $_ : $cgi->a({-href => ($arg{$_}{_href} ? $arg{$_}{_href} : href(%{$arg{$_}}))}, "$_")
3827                  } @navs);
3828         print "<br/>\n$extra<br/>\n" .
3829               "</div>\n";
3830 }
3831
3832 # returns a submenu for the nagivation of the refs views (tags, heads,
3833 # remotes) with the current view disabled and the remotes view only
3834 # available if the feature is enabled
3835 sub format_ref_views {
3836         my ($current) = @_;
3837         my @ref_views = qw{tags heads};
3838         push @ref_views, 'remotes' if gitweb_check_feature('remote_heads');
3839         return join " | ", map {
3840                 $_ eq $current ? $_ :
3841                 $cgi->a({-href => href(action=>$_)}, $_)
3842         } @ref_views
3843 }
3844
3845 sub format_paging_nav {
3846         my ($action, $page, $has_next_link) = @_;
3847         my $paging_nav;
3848
3849
3850         if ($page > 0) {
3851                 $paging_nav .=
3852                         $cgi->a({-href => href(-replay=>1, page=>undef)}, "first") .
3853                         " &sdot; " .
3854                         $cgi->a({-href => href(-replay=>1, page=>$page-1),
3855                                  -accesskey => "p", -title => "Alt-p"}, "prev");
3856         } else {
3857                 $paging_nav .= "first &sdot; prev";
3858         }
3859
3860         if ($has_next_link) {
3861                 $paging_nav .= " &sdot; " .
3862                         $cgi->a({-href => href(-replay=>1, page=>$page+1),
3863                                  -accesskey => "n", -title => "Alt-n"}, "next");
3864         } else {
3865                 $paging_nav .= " &sdot; next";
3866         }
3867
3868         return $paging_nav;
3869 }
3870
3871 ## ......................................................................
3872 ## functions printing or outputting HTML: div
3873
3874 sub git_print_header_div {
3875         my ($action, $title, $hash, $hash_base) = @_;
3876         my %args = ();
3877
3878         $args{'action'} = $action;
3879         $args{'hash'} = $hash if $hash;
3880         $args{'hash_base'} = $hash_base if $hash_base;
3881
3882         print "<div class=\"header\">\n" .
3883               $cgi->a({-href => href(%args), -class => "title"},
3884               $title ? $title : $action) .
3885               "\n</div>\n";
3886 }
3887
3888 sub format_repo_url {
3889         my ($name, $url) = @_;
3890         return "<tr class=\"metadata_url\"><td>$name</td><td>$url</td></tr>\n";
3891 }
3892
3893 # Group output by placing it in a DIV element and adding a header.
3894 # Options for start_div() can be provided by passing a hash reference as the
3895 # first parameter to the function.
3896 # Options to git_print_header_div() can be provided by passing an array
3897 # reference. This must follow the options to start_div if they are present.
3898 # The content can be a scalar, which is output as-is, a scalar reference, which
3899 # is output after html escaping, an IO handle passed either as *handle or
3900 # *handle{IO}, or a function reference. In the latter case all following
3901 # parameters will be taken as argument to the content function call.
3902 sub git_print_section {
3903         my ($div_args, $header_args, $content);
3904         my $arg = shift;
3905         if (ref($arg) eq 'HASH') {
3906                 $div_args = $arg;
3907                 $arg = shift;
3908         }
3909         if (ref($arg) eq 'ARRAY') {
3910                 $header_args = $arg;
3911                 $arg = shift;
3912         }
3913         $content = $arg;
3914
3915         print $cgi->start_div($div_args);
3916         git_print_header_div(@$header_args);
3917
3918         if (ref($content) eq 'CODE') {
3919                 $content->(@_);
3920         } elsif (ref($content) eq 'SCALAR') {
3921                 print esc_html($$content);
3922         } elsif (ref($content) eq 'GLOB' or ref($content) eq 'IO::Handle') {
3923                 print <$content>;
3924         } elsif (!ref($content) && defined($content)) {
3925                 print $content;
3926         }
3927
3928         print $cgi->end_div;
3929 }
3930
3931 sub print_local_time {
3932         print format_local_time(@_);
3933 }
3934
3935 sub format_local_time {
3936         my $localtime = '';
3937         my %date = @_;
3938         if ($date{'hour_local'} < 6) {
3939                 $localtime .= sprintf(" (<span class=\"atnight\">%02d:%02d</span> %s)",
3940                         $date{'hour_local'}, $date{'minute_local'}, $date{'tz_local'});
3941         } else {
3942                 $localtime .= sprintf(" (%02d:%02d %s)",
3943                         $date{'hour_local'}, $date{'minute_local'}, $date{'tz_local'});
3944         }
3945
3946         return $localtime;
3947 }
3948
3949 # Outputs the author name and date in long form
3950 sub git_print_authorship {
3951         my $co = shift;
3952         my %opts = @_;
3953         my $tag = $opts{-tag} || 'div';
3954         my $author = $co->{'author_name'};
3955
3956         my %ad = parse_date($co->{'author_epoch'}, $co->{'author_tz'});
3957         print "<$tag class=\"author_date\">" .
3958               format_search_author($author, "author", esc_html($author)) .
3959               " [$ad{'rfc2822'}";
3960         print_local_time(%ad) if ($opts{-localtime});
3961         print "]" . git_get_avatar($co->{'author_email'}, -pad_before => 1)
3962                   . "</$tag>\n";
3963 }
3964
3965 # Outputs table rows containing the full author or committer information,
3966 # in the format expected for 'commit' view (& similar).
3967 # Parameters are a commit hash reference, followed by the list of people
3968 # to output information for. If the list is empty it defaults to both
3969 # author and committer.
3970 sub git_print_authorship_rows {
3971         my $co = shift;
3972         # too bad we can't use @people = @_ || ('author', 'committer')
3973         my @people = @_;
3974         @people = ('author', 'committer') unless @people;
3975         foreach my $who (@people) {
3976                 my %wd = parse_date($co->{"${who}_epoch"}, $co->{"${who}_tz"});
3977                 print "<tr><td>$who</td><td>" .
3978                       format_search_author($co->{"${who}_name"}, $who,
3979                                esc_html($co->{"${who}_name"})) . " " .
3980                       format_search_author($co->{"${who}_email"}, $who,
3981                                esc_html("<" . $co->{"${who}_email"} . ">")) .
3982                       "</td><td rowspan=\"2\">" .
3983                       git_get_avatar($co->{"${who}_email"}, -size => 'double') .
3984                       "</td></tr>\n" .
3985                       "<tr>" .
3986                       "<td></td><td> $wd{'rfc2822'}";
3987                 print_local_time(%wd);
3988                 print "</td>" .
3989                       "</tr>\n";
3990         }
3991 }
3992
3993 sub git_print_page_path {
3994         my $name = shift;
3995         my $type = shift;
3996         my $hb = shift;
3997
3998
3999         print "<div class=\"page_path\">";
4000         print $cgi->a({-href => href(action=>"tree", hash_base=>$hb),
4001                       -title => 'tree root'}, to_utf8("[$project]"));
4002         print " / ";
4003         if (defined $name) {
4004                 my @dirname = split '/', $name;
4005                 my $basename = pop @dirname;
4006                 my $fullname = '';
4007
4008                 foreach my $dir (@dirname) {
4009                         $fullname .= ($fullname ? '/' : '') . $dir;
4010                         print $cgi->a({-href => href(action=>"tree", file_name=>$fullname,
4011                                                      hash_base=>$hb),
4012                                       -title => $fullname}, esc_path($dir));
4013                         print " / ";
4014                 }
4015                 if (defined $type && $type eq 'blob') {
4016                         print $cgi->a({-href => href(action=>"blob_plain", file_name=>$file_name,
4017                                                      hash_base=>$hb),
4018                                       -title => $name}, esc_path($basename));
4019                 } elsif (defined $type && $type eq 'tree') {
4020                         print $cgi->a({-href => href(action=>"tree", file_name=>$file_name,
4021                                                      hash_base=>$hb),
4022                                       -title => $name}, esc_path($basename));
4023                         print " / ";
4024                 } else {
4025                         print esc_path($basename);
4026                 }
4027         }
4028         print "<br/></div>\n";
4029 }
4030
4031 sub git_print_log {
4032         my $log = shift;
4033         my %opts = @_;
4034
4035         if ($opts{'-remove_title'}) {
4036                 # remove title, i.e. first line of log
4037                 shift @$log;
4038         }
4039         # remove leading empty lines
4040         while (defined $log->[0] && $log->[0] eq "") {
4041                 shift @$log;
4042         }
4043
4044         # print log
4045         my $signoff = 0;
4046         my $empty = 0;
4047         foreach my $line (@$log) {
4048                 if ($line =~ m/^ *(signed[ \-]off[ \-]by[ :]|acked[ \-]by[ :]|cc[ :])/i) {
4049                         $signoff = 1;
4050                         $empty = 0;
4051                         if (! $opts{'-remove_signoff'}) {
4052                                 print "<span class=\"signoff\">" . esc_html($line) . "</span><br/>\n";
4053                                 next;
4054                         } else {
4055                                 # remove signoff lines
4056                                 next;
4057                         }
4058                 } else {
4059                         $signoff = 0;
4060                 }
4061
4062                 # print only one empty line
4063                 # do not print empty line after signoff
4064                 if ($line eq "") {
4065                         next if ($empty || $signoff);
4066                         $empty = 1;
4067                 } else {
4068                         $empty = 0;
4069                 }
4070
4071                 print format_log_line_html($line) . "<br/>\n";
4072         }
4073
4074         if ($opts{'-final_empty_line'}) {
4075                 # end with single empty line
4076                 print "<br/>\n" unless $empty;
4077         }
4078 }
4079
4080 # return link target (what link points to)
4081 sub git_get_link_target {
4082         my $hash = shift;
4083         my $link_target;
4084
4085         # read link
4086         open my $fd, "-|", git_cmd(), "cat-file", "blob", $hash
4087                 or return;
4088         {
4089                 local $/ = undef;
4090                 $link_target = <$fd>;
4091         }
4092         close $fd
4093                 or return;
4094
4095         return $link_target;
4096 }
4097
4098 # given link target, and the directory (basedir) the link is in,
4099 # return target of link relative to top directory (top tree);
4100 # return undef if it is not possible (including absolute links).
4101 sub normalize_link_target {
4102         my ($link_target, $basedir) = @_;
4103
4104         # absolute symlinks (beginning with '/') cannot be normalized
4105         return if (substr($link_target, 0, 1) eq '/');
4106
4107         # normalize link target to path from top (root) tree (dir)
4108         my $path;
4109         if ($basedir) {
4110                 $path = $basedir . '/' . $link_target;
4111         } else {
4112                 # we are in top (root) tree (dir)
4113                 $path = $link_target;
4114         }
4115
4116         # remove //, /./, and /../
4117         my @path_parts;
4118         foreach my $part (split('/', $path)) {
4119                 # discard '.' and ''
4120                 next if (!$part || $part eq '.');
4121                 # handle '..'
4122                 if ($part eq '..') {
4123                         if (@path_parts) {
4124                                 pop @path_parts;
4125                         } else {
4126                                 # link leads outside repository (outside top dir)
4127                                 return;
4128                         }
4129                 } else {
4130                         push @path_parts, $part;
4131                 }
4132         }
4133         $path = join('/', @path_parts);
4134
4135         return $path;
4136 }
4137
4138 # print tree entry (row of git_tree), but without encompassing <tr> element
4139 sub git_print_tree_entry {
4140         my ($t, $basedir, $hash_base, $have_blame) = @_;
4141
4142         my %base_key = ();
4143         $base_key{'hash_base'} = $hash_base if defined $hash_base;
4144
4145         # The format of a table row is: mode list link.  Where mode is
4146         # the mode of the entry, list is the name of the entry, an href,
4147         # and link is the action links of the entry.
4148
4149         print "<td class=\"mode\">" . mode_str($t->{'mode'}) . "</td>\n";
4150         if (exists $t->{'size'}) {
4151                 print "<td class=\"size\">$t->{'size'}</td>\n";
4152         }
4153         if ($t->{'type'} eq "blob") {
4154                 print "<td class=\"list\">" .
4155                         $cgi->a({-href => href(action=>"blob", hash=>$t->{'hash'},
4156                                                file_name=>"$basedir$t->{'name'}", %base_key),
4157                                 -class => "list"}, esc_path($t->{'name'}));
4158                 if (S_ISLNK(oct $t->{'mode'})) {
4159                         my $link_target = git_get_link_target($t->{'hash'});
4160                         if ($link_target) {
4161                                 my $norm_target = normalize_link_target($link_target, $basedir);
4162                                 if (defined $norm_target) {
4163                                         print " -> " .
4164                                               $cgi->a({-href => href(action=>"object", hash_base=>$hash_base,
4165                                                                      file_name=>$norm_target),
4166                                                        -title => $norm_target}, esc_path($link_target));
4167                                 } else {
4168                                         print " -> " . esc_path($link_target);
4169                                 }
4170                         }
4171                 }
4172                 print "</td>\n";
4173                 print "<td class=\"link\">";
4174                 print $cgi->a({-href => href(action=>"blob", hash=>$t->{'hash'},
4175                                              file_name=>"$basedir$t->{'name'}", %base_key)},
4176                               "blob");
4177                 if ($have_blame) {
4178                         print " | " .
4179                               $cgi->a({-href => href(action=>"blame", hash=>$t->{'hash'},
4180                                                      file_name=>"$basedir$t->{'name'}", %base_key)},
4181                                       "blame");
4182                 }
4183                 if (defined $hash_base) {
4184                         print " | " .
4185                               $cgi->a({-href => href(action=>"history", hash_base=>$hash_base,
4186                                                      hash=>$t->{'hash'}, file_name=>"$basedir$t->{'name'}")},
4187                                       "history");
4188                 }
4189                 print " | " .
4190                         $cgi->a({-href => href(action=>"blob_plain", hash_base=>$hash_base,
4191                                                file_name=>"$basedir$t->{'name'}")},
4192                                 "raw");
4193                 print "</td>\n";
4194
4195         } elsif ($t->{'type'} eq "tree") {
4196                 print "<td class=\"list\">";
4197                 print $cgi->a({-href => href(action=>"tree", hash=>$t->{'hash'},
4198                                              file_name=>"$basedir$t->{'name'}",
4199                                              %base_key)},
4200                               esc_path($t->{'name'}));
4201                 print "</td>\n";
4202                 print "<td class=\"link\">";
4203                 print $cgi->a({-href => href(action=>"tree", hash=>$t->{'hash'},
4204                                              file_name=>"$basedir$t->{'name'}",
4205                                              %base_key)},
4206                               "tree");
4207                 if (defined $hash_base) {
4208                         print " | " .
4209                               $cgi->a({-href => href(action=>"history", hash_base=>$hash_base,
4210                                                      file_name=>"$basedir$t->{'name'}")},
4211                                       "history");
4212                 }
4213                 print "</td>\n";
4214         } else {
4215                 # unknown object: we can only present history for it
4216                 # (this includes 'commit' object, i.e. submodule support)
4217                 print "<td class=\"list\">" .
4218                       esc_path($t->{'name'}) .
4219                       "</td>\n";
4220                 print "<td class=\"link\">";
4221                 if (defined $hash_base) {
4222                         print $cgi->a({-href => href(action=>"history",
4223                                                      hash_base=>$hash_base,
4224                                                      file_name=>"$basedir$t->{'name'}")},
4225                                       "history");
4226                 }
4227                 print "</td>\n";
4228         }
4229 }
4230
4231 ## ......................................................................
4232 ## functions printing large fragments of HTML
4233
4234 # get pre-image filenames for merge (combined) diff
4235 sub fill_from_file_info {
4236         my ($diff, @parents) = @_;
4237
4238         $diff->{'from_file'} = [ ];
4239         $diff->{'from_file'}[$diff->{'nparents'} - 1] = undef;
4240         for (my $i = 0; $i < $diff->{'nparents'}; $i++) {
4241                 if ($diff->{'status'}[$i] eq 'R' ||
4242                     $diff->{'status'}[$i] eq 'C') {
4243                         $diff->{'from_file'}[$i] =
4244                                 git_get_path_by_hash($parents[$i], $diff->{'from_id'}[$i]);
4245                 }
4246         }
4247
4248         return $diff;
4249 }
4250
4251 # is current raw difftree line of file deletion
4252 sub is_deleted {
4253         my $diffinfo = shift;
4254
4255         return $diffinfo->{'to_id'} eq ('0' x 40);
4256 }
4257
4258 # does patch correspond to [previous] difftree raw line
4259 # $diffinfo  - hashref of parsed raw diff format
4260 # $patchinfo - hashref of parsed patch diff format
4261 #              (the same keys as in $diffinfo)
4262 sub is_patch_split {
4263         my ($diffinfo, $patchinfo) = @_;
4264
4265         return defined $diffinfo && defined $patchinfo
4266                 && $diffinfo->{'to_file'} eq $patchinfo->{'to_file'};
4267 }
4268
4269
4270 sub git_difftree_body {
4271         my ($difftree, $hash, @parents) = @_;
4272         my ($parent) = $parents[0];
4273         my $have_blame = gitweb_check_feature('blame');
4274         print "<div class=\"list_head\">\n";
4275         if ($#{$difftree} > 10) {
4276                 print(($#{$difftree} + 1) . " files changed:\n");
4277         }
4278         print "</div>\n";
4279
4280         print "<table class=\"" .
4281               (@parents > 1 ? "combined " : "") .
4282               "diff_tree\">\n";
4283
4284         # header only for combined diff in 'commitdiff' view
4285         my $has_header = @$difftree && @parents > 1 && $action eq 'commitdiff';
4286         if ($has_header) {
4287                 # table header
4288                 print "<thead><tr>\n" .
4289                        "<th></th><th></th>\n"; # filename, patchN link
4290                 for (my $i = 0; $i < @parents; $i++) {
4291                         my $par = $parents[$i];
4292                         print "<th>" .
4293                               $cgi->a({-href => href(action=>"commitdiff",
4294                                                      hash=>$hash, hash_parent=>$par),
4295                                        -title => 'commitdiff to parent number ' .
4296                                                   ($i+1) . ': ' . substr($par,0,7)},
4297                                       $i+1) .
4298                               "&nbsp;</th>\n";
4299                 }
4300                 print "</tr></thead>\n<tbody>\n";
4301         }
4302
4303         my $alternate = 1;
4304         my $patchno = 0;
4305         foreach my $line (@{$difftree}) {
4306                 my $diff = parsed_difftree_line($line);
4307
4308                 if ($alternate) {
4309                         print "<tr class=\"dark\">\n";
4310                 } else {
4311                         print "<tr class=\"light\">\n";
4312                 }
4313                 $alternate ^= 1;
4314
4315                 if (exists $diff->{'nparents'}) { # combined diff
4316
4317                         fill_from_file_info($diff, @parents)
4318                                 unless exists $diff->{'from_file'};
4319
4320                         if (!is_deleted($diff)) {
4321                                 # file exists in the result (child) commit
4322                                 print "<td>" .
4323                                       $cgi->a({-href => href(action=>"blob", hash=>$diff->{'to_id'},
4324                                                              file_name=>$diff->{'to_file'},
4325                                                              hash_base=>$hash),
4326                                               -class => "list"}, esc_path($diff->{'to_file'})) .
4327                                       "</td>\n";
4328                         } else {
4329                                 print "<td>" .
4330                                       esc_path($diff->{'to_file'}) .
4331                                       "</td>\n";
4332                         }
4333
4334                         if ($action eq 'commitdiff') {
4335                                 # link to patch
4336                                 $patchno++;
4337                                 print "<td class=\"link\">" .
4338                                       $cgi->a({-href => "#patch$patchno"}, "patch") .
4339                                       " | " .
4340                                       "</td>\n";
4341                         }
4342
4343                         my $has_history = 0;
4344                         my $not_deleted = 0;
4345                         for (my $i = 0; $i < $diff->{'nparents'}; $i++) {
4346                                 my $hash_parent = $parents[$i];
4347                                 my $from_hash = $diff->{'from_id'}[$i];
4348                                 my $from_path = $diff->{'from_file'}[$i];
4349                                 my $status = $diff->{'status'}[$i];
4350
4351                                 $has_history ||= ($status ne 'A');
4352                                 $not_deleted ||= ($status ne 'D');
4353
4354                                 if ($status eq 'A') {
4355                                         print "<td  class=\"link\" align=\"right\"> | </td>\n";
4356                                 } elsif ($status eq 'D') {
4357                                         print "<td class=\"link\">" .
4358                                               $cgi->a({-href => href(action=>"blob",
4359                                                                      hash_base=>$hash,
4360                                                                      hash=>$from_hash,
4361                                                                      file_name=>$from_path)},
4362                                                       "blob" . ($i+1)) .
4363                                               " | </td>\n";
4364                                 } else {
4365                                         if ($diff->{'to_id'} eq $from_hash) {
4366                                                 print "<td class=\"link nochange\">";
4367                                         } else {
4368                                                 print "<td class=\"link\">";
4369                                         }
4370                                         print $cgi->a({-href => href(action=>"blobdiff",
4371                                                                      hash=>$diff->{'to_id'},
4372                                                                      hash_parent=>$from_hash,
4373                                                                      hash_base=>$hash,
4374                                                                      hash_parent_base=>$hash_parent,
4375                                                                      file_name=>$diff->{'to_file'},
4376                                                                      file_parent=>$from_path)},
4377                                                       "diff" . ($i+1)) .
4378                                               " | </td>\n";
4379                                 }
4380                         }
4381
4382                         print "<td class=\"link\">";
4383                         if ($not_deleted) {
4384                                 print $cgi->a({-href => href(action=>"blob",
4385                                                              hash=>$diff->{'to_id'},
4386                                                              file_name=>$diff->{'to_file'},
4387                                                              hash_base=>$hash)},
4388                                               "blob");
4389                                 print " | " if ($has_history);
4390                         }
4391                         if ($has_history) {
4392                                 print $cgi->a({-href => href(action=>"history",
4393                                                              file_name=>$diff->{'to_file'},
4394                                                              hash_base=>$hash)},
4395                                               "history");
4396                         }
4397                         print "</td>\n";
4398
4399                         print "</tr>\n";
4400                         next; # instead of 'else' clause, to avoid extra indent
4401                 }
4402                 # else ordinary diff
4403
4404                 my ($to_mode_oct, $to_mode_str, $to_file_type);
4405                 my ($from_mode_oct, $from_mode_str, $from_file_type);
4406                 if ($diff->{'to_mode'} ne ('0' x 6)) {
4407                         $to_mode_oct = oct $diff->{'to_mode'};
4408                         if (S_ISREG($to_mode_oct)) { # only for regular file
4409                                 $to_mode_str = sprintf("%04o", $to_mode_oct & 0777); # permission bits
4410                         }
4411                         $to_file_type = file_type($diff->{'to_mode'});
4412                 }
4413                 if ($diff->{'from_mode'} ne ('0' x 6)) {
4414                         $from_mode_oct = oct $diff->{'from_mode'};
4415                         if (S_ISREG($to_mode_oct)) { # only for regular file
4416                                 $from_mode_str = sprintf("%04o", $from_mode_oct & 0777); # permission bits
4417                         }
4418                         $from_file_type = file_type($diff->{'from_mode'});
4419                 }
4420
4421                 if ($diff->{'status'} eq "A") { # created
4422                         my $mode_chng = "<span class=\"file_status new\">[new $to_file_type";
4423                         $mode_chng   .= " with mode: $to_mode_str" if $to_mode_str;
4424                         $mode_chng   .= "]</span>";
4425                         print "<td>";
4426                         print $cgi->a({-href => href(action=>"blob", hash=>$diff->{'to_id'},
4427                                                      hash_base=>$hash, file_name=>$diff->{'file'}),
4428                                       -class => "list"}, esc_path($diff->{'file'}));
4429                         print "</td>\n";
4430                         print "<td>$mode_chng</td>\n";
4431                         print "<td class=\"link\">";
4432                         if ($action eq 'commitdiff') {
4433                                 # link to patch
4434                                 $patchno++;
4435                                 print $cgi->a({-href => "#patch$patchno"}, "patch");
4436                                 print " | ";
4437                         }
4438                         print $cgi->a({-href => href(action=>"blob", hash=>$diff->{'to_id'},
4439                                                      hash_base=>$hash, file_name=>$diff->{'file'})},
4440                                       "blob");
4441                         print "</td>\n";
4442
4443                 } elsif ($diff->{'status'} eq "D") { # deleted
4444                         my $mode_chng = "<span class=\"file_status deleted\">[deleted $from_file_type]</span>";
4445                         print "<td>";
4446                         print $cgi->a({-href => href(action=>"blob", hash=>$diff->{'from_id'},
4447                                                      hash_base=>$parent, file_name=>$diff->{'file'}),
4448                                        -class => "list"}, esc_path($diff->{'file'}));
4449                         print "</td>\n";
4450                         print "<td>$mode_chng</td>\n";
4451                         print "<td class=\"link\">";
4452                         if ($action eq 'commitdiff') {
4453                                 # link to patch
4454                                 $patchno++;
4455                                 print $cgi->a({-href => "#patch$patchno"}, "patch");
4456                                 print " | ";
4457                         }
4458                         print $cgi->a({-href => href(action=>"blob", hash=>$diff->{'from_id'},
4459                                                      hash_base=>$parent, file_name=>$diff->{'file'})},
4460                                       "blob") . " | ";
4461                         if ($have_blame) {
4462                                 print $cgi->a({-href => href(action=>"blame", hash_base=>$parent,
4463                                                              file_name=>$diff->{'file'})},
4464                                               "blame") . " | ";
4465                         }
4466                         print $cgi->a({-href => href(action=>"history", hash_base=>$parent,
4467                                                      file_name=>$diff->{'file'})},
4468                                       "history");
4469                         print "</td>\n";
4470
4471                 } elsif ($diff->{'status'} eq "M" || $diff->{'status'} eq "T") { # modified, or type changed
4472                         my $mode_chnge = "";
4473                         if ($diff->{'from_mode'} != $diff->{'to_mode'}) {
4474                                 $mode_chnge = "<span class=\"file_status mode_chnge\">[changed";
4475                                 if ($from_file_type ne $to_file_type) {
4476                                         $mode_chnge .= " from $from_file_type to $to_file_type";
4477                                 }
4478                                 if (($from_mode_oct & 0777) != ($to_mode_oct & 0777)) {
4479                                         if ($from_mode_str && $to_mode_str) {
4480                                                 $mode_chnge .= " mode: $from_mode_str->$to_mode_str";
4481                                         } elsif ($to_mode_str) {
4482                                                 $mode_chnge .= " mode: $to_mode_str";
4483                                         }
4484                                 }
4485                                 $mode_chnge .= "]</span>\n";
4486                         }
4487                         print "<td>";
4488                         print $cgi->a({-href => href(action=>"blob", hash=>$diff->{'to_id'},
4489                                                      hash_base=>$hash, file_name=>$diff->{'file'}),
4490                                       -class => "list"}, esc_path($diff->{'file'}));
4491                         print "</td>\n";
4492                         print "<td>$mode_chnge</td>\n";
4493                         print "<td class=\"link\">";
4494                         if ($action eq 'commitdiff') {
4495                                 # link to patch
4496                                 $patchno++;
4497                                 print $cgi->a({-href => "#patch$patchno"}, "patch") .
4498                                       " | ";
4499                         } elsif ($diff->{'to_id'} ne $diff->{'from_id'}) {
4500                                 # "commit" view and modified file (not onlu mode changed)
4501                                 print $cgi->a({-href => href(action=>"blobdiff",
4502                                                              hash=>$diff->{'to_id'}, hash_parent=>$diff->{'from_id'},
4503                                                              hash_base=>$hash, hash_parent_base=>$parent,
4504                                                              file_name=>$diff->{'file'})},
4505                                               "diff") .
4506                                       " | ";
4507                         }
4508                         print $cgi->a({-href => href(action=>"blob", hash=>$diff->{'to_id'},
4509                                                      hash_base=>$hash, file_name=>$diff->{'file'})},
4510                                        "blob") . " | ";
4511                         if ($have_blame) {
4512                                 print $cgi->a({-href => href(action=>"blame", hash_base=>$hash,
4513                                                              file_name=>$diff->{'file'})},
4514                                               "blame") . " | ";
4515                         }
4516                         print $cgi->a({-href => href(action=>"history", hash_base=>$hash,
4517                                                      file_name=>$diff->{'file'})},
4518                                       "history");
4519                         print "</td>\n";
4520
4521                 } elsif ($diff->{'status'} eq "R" || $diff->{'status'} eq "C") { # renamed or copied
4522                         my %status_name = ('R' => 'moved', 'C' => 'copied');
4523                         my $nstatus = $status_name{$diff->{'status'}};
4524                         my $mode_chng = "";
4525                         if ($diff->{'from_mode'} != $diff->{'to_mode'}) {
4526                                 # mode also for directories, so we cannot use $to_mode_str
4527                                 $mode_chng = sprintf(", mode: %04o", $to_mode_oct & 0777);
4528                         }
4529                         print "<td>" .
4530                               $cgi->a({-href => href(action=>"blob", hash_base=>$hash,
4531                                                      hash=>$diff->{'to_id'}, file_name=>$diff->{'to_file'}),
4532                                       -class => "list"}, esc_path($diff->{'to_file'})) . "</td>\n" .
4533                               "<td><span class=\"file_status $nstatus\">[$nstatus from " .
4534                               $cgi->a({-href => href(action=>"blob", hash_base=>$parent,
4535                                                      hash=>$diff->{'from_id'}, file_name=>$diff->{'from_file'}),
4536                                       -class => "list"}, esc_path($diff->{'from_file'})) .
4537                               " with " . (int $diff->{'similarity'}) . "% similarity$mode_chng]</span></td>\n" .
4538                               "<td class=\"link\">";
4539                         if ($action eq 'commitdiff') {
4540                                 # link to patch
4541                                 $patchno++;
4542                                 print $cgi->a({-href => "#patch$patchno"}, "patch") .
4543                                       " | ";
4544                         } elsif ($diff->{'to_id'} ne $diff->{'from_id'}) {
4545                                 # "commit" view and modified file (not only pure rename or copy)
4546                                 print $cgi->a({-href => href(action=>"blobdiff",
4547                                                              hash=>$diff->{'to_id'}, hash_parent=>$diff->{'from_id'},
4548                                                              hash_base=>$hash, hash_parent_base=>$parent,
4549                                                              file_name=>$diff->{'to_file'}, file_parent=>$diff->{'from_file'})},
4550                                               "diff") .
4551                                       " | ";
4552                         }
4553                         print $cgi->a({-href => href(action=>"blob", hash=>$diff->{'to_id'},
4554                                                      hash_base=>$parent, file_name=>$diff->{'to_file'})},
4555                                       "blob") . " | ";
4556                         if ($have_blame) {
4557                                 print $cgi->a({-href => href(action=>"blame", hash_base=>$hash,
4558                                                              file_name=>$diff->{'to_file'})},
4559                                               "blame") . " | ";
4560                         }
4561                         print $cgi->a({-href => href(action=>"history", hash_base=>$hash,
4562                                                     file_name=>$diff->{'to_file'})},
4563                                       "history");
4564                         print "</td>\n";
4565
4566                 } # we should not encounter Unmerged (U) or Unknown (X) status
4567                 print "</tr>\n";
4568         }
4569         print "</tbody>" if $has_header;
4570         print "</table>\n";
4571 }
4572
4573 sub git_patchset_body {
4574         my ($fd, $difftree, $hash, @hash_parents) = @_;
4575         my ($hash_parent) = $hash_parents[0];
4576
4577         my $is_combined = (@hash_parents > 1);
4578         my $patch_idx = 0;
4579         my $patch_number = 0;
4580         my $patch_line;
4581         my $diffinfo;
4582         my $to_name;
4583         my (%from, %to);
4584
4585         print "<div class=\"patchset\">\n";
4586
4587         # skip to first patch
4588         while ($patch_line = <$fd>) {
4589                 chomp $patch_line;
4590
4591                 last if ($patch_line =~ m/^diff /);
4592         }
4593
4594  PATCH:
4595         while ($patch_line) {
4596
4597                 # parse "git diff" header line
4598                 if ($patch_line =~ m/^diff --git (\"(?:[^\\\"]*(?:\\.[^\\\"]*)*)\"|[^ "]*) (.*)$/) {
4599                         # $1 is from_name, which we do not use
4600                         $to_name = unquote($2);
4601                         $to_name =~ s!^b/!!;
4602                 } elsif ($patch_line =~ m/^diff --(cc|combined) ("?.*"?)$/) {
4603                         # $1 is 'cc' or 'combined', which we do not use
4604                         $to_name = unquote($2);
4605                 } else {
4606                         $to_name = undef;
4607                 }
4608
4609                 # check if current patch belong to current raw line
4610                 # and parse raw git-diff line if needed
4611                 if (is_patch_split($diffinfo, { 'to_file' => $to_name })) {
4612                         # this is continuation of a split patch
4613                         print "<div class=\"patch cont\">\n";
4614                 } else {
4615                         # advance raw git-diff output if needed
4616                         $patch_idx++ if defined $diffinfo;
4617
4618                         # read and prepare patch information
4619                         $diffinfo = parsed_difftree_line($difftree->[$patch_idx]);
4620
4621                         # compact combined diff output can have some patches skipped
4622                         # find which patch (using pathname of result) we are at now;
4623                         if ($is_combined) {
4624                                 while ($to_name ne $diffinfo->{'to_file'}) {
4625                                         print "<div class=\"patch\" id=\"patch". ($patch_idx+1) ."\">\n" .
4626                                               format_diff_cc_simplified($diffinfo, @hash_parents) .
4627                                               "</div>\n";  # class="patch"
4628
4629                                         $patch_idx++;
4630                                         $patch_number++;
4631
4632                                         last if $patch_idx > $#$difftree;
4633                                         $diffinfo = parsed_difftree_line($difftree->[$patch_idx]);
4634                                 }
4635                         }
4636
4637                         # modifies %from, %to hashes
4638                         parse_from_to_diffinfo($diffinfo, \%from, \%to, @hash_parents);
4639
4640                         # this is first patch for raw difftree line with $patch_idx index
4641                         # we index @$difftree array from 0, but number patches from 1
4642                         print "<div class=\"patch\" id=\"patch". ($patch_idx+1) ."\">\n";
4643                 }
4644
4645                 # git diff header
4646                 #assert($patch_line =~ m/^diff /) if DEBUG;
4647                 #assert($patch_line !~ m!$/$!) if DEBUG; # is chomp-ed
4648                 $patch_number++;
4649                 # print "git diff" header
4650                 print format_git_diff_header_line($patch_line, $diffinfo,
4651                                                   \%from, \%to);
4652
4653                 # print extended diff header
4654                 print "<div class=\"diff extended_header\">\n";
4655         EXTENDED_HEADER:
4656                 while ($patch_line = <$fd>) {
4657                         chomp $patch_line;
4658
4659                         last EXTENDED_HEADER if ($patch_line =~ m/^--- |^diff /);
4660
4661                         print format_extended_diff_header_line($patch_line, $diffinfo,
4662                                                                \%from, \%to);
4663                 }
4664                 print "</div>\n"; # class="diff extended_header"
4665
4666                 # from-file/to-file diff header
4667                 if (! $patch_line) {
4668                         print "</div>\n"; # class="patch"
4669                         last PATCH;
4670                 }
4671                 next PATCH if ($patch_line =~ m/^diff /);
4672                 #assert($patch_line =~ m/^---/) if DEBUG;
4673
4674                 my $last_patch_line = $patch_line;
4675                 $patch_line = <$fd>;
4676                 chomp $patch_line;
4677                 #assert($patch_line =~ m/^\+\+\+/) if DEBUG;
4678
4679                 print format_diff_from_to_header($last_patch_line, $patch_line,
4680                                                  $diffinfo, \%from, \%to,
4681                                                  @hash_parents);
4682
4683                 # the patch itself
4684         LINE:
4685                 while ($patch_line = <$fd>) {
4686                         chomp $patch_line;
4687
4688                         next PATCH if ($patch_line =~ m/^diff /);
4689
4690                         print format_diff_line($patch_line, \%from, \%to);
4691                 }
4692
4693         } continue {
4694                 print "</div>\n"; # class="patch"
4695         }
4696
4697         # for compact combined (--cc) format, with chunk and patch simplification
4698         # the patchset might be empty, but there might be unprocessed raw lines
4699         for (++$patch_idx if $patch_number > 0;
4700              $patch_idx < @$difftree;
4701              ++$patch_idx) {
4702                 # read and prepare patch information
4703                 $diffinfo = parsed_difftree_line($difftree->[$patch_idx]);
4704
4705                 # generate anchor for "patch" links in difftree / whatchanged part
4706                 print "<div class=\"patch\" id=\"patch". ($patch_idx+1) ."\">\n" .
4707                       format_diff_cc_simplified($diffinfo, @hash_parents) .
4708                       "</div>\n";  # class="patch"
4709
4710                 $patch_number++;
4711         }
4712
4713         if ($patch_number == 0) {
4714                 if (@hash_parents > 1) {
4715                         print "<div class=\"diff nodifferences\">Trivial merge</div>\n";
4716                 } else {
4717                         print "<div class=\"diff nodifferences\">No differences found</div>\n";
4718                 }
4719         }
4720
4721         print "</div>\n"; # class="patchset"
4722 }
4723
4724 # . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
4725
4726 # fills project list info (age, description, owner, forks) for each
4727 # project in the list, removing invalid projects from returned list
4728 # NOTE: modifies $projlist, but does not remove entries from it
4729 sub fill_project_list_info {
4730         my ($projlist, $check_forks) = @_;
4731         my @projects;
4732
4733         my $show_ctags = gitweb_check_feature('ctags');
4734  PROJECT:
4735         foreach my $pr (@$projlist) {
4736                 my (@activity) = git_get_last_activity($pr->{'path'});
4737                 unless (@activity) {
4738                         next PROJECT;
4739                 }
4740                 ($pr->{'age'}, $pr->{'age_string'}) = @activity;
4741                 if (!defined $pr->{'descr'}) {
4742                         my $descr = git_get_project_description($pr->{'path'}) || "";
4743                         $descr = to_utf8($descr);
4744                         $pr->{'descr_long'} = $descr;
4745                         $pr->{'descr'} = chop_str($descr, $projects_list_description_width, 5);
4746                 }
4747                 if (!defined $pr->{'owner'}) {
4748                         $pr->{'owner'} = git_get_project_owner("$pr->{'path'}") || "";
4749                 }
4750                 if ($check_forks) {
4751                         my $pname = $pr->{'path'};
4752                         if (($pname =~ s/\.git$//) &&
4753                             ($pname !~ /\/$/) &&
4754                             (-d "$projectroot/$pname")) {
4755                                 $pr->{'forks'} = "-d $projectroot/$pname";
4756                         } else {
4757                                 $pr->{'forks'} = 0;
4758                         }
4759                 }
4760                 $show_ctags and $pr->{'ctags'} = git_get_project_ctags($pr->{'path'});
4761                 push @projects, $pr;
4762         }
4763
4764         return @projects;
4765 }
4766
4767 # print 'sort by' <th> element, generating 'sort by $name' replay link
4768 # if that order is not selected
4769 sub print_sort_th {
4770         print format_sort_th(@_);
4771 }
4772
4773 sub format_sort_th {
4774         my ($name, $order, $header) = @_;
4775         my $sort_th = "";
4776         $header ||= ucfirst($name);
4777
4778         if ($order eq $name) {
4779                 $sort_th .= "<th>$header</th>\n";
4780         } else {
4781                 $sort_th .= "<th>" .
4782                             $cgi->a({-href => href(-replay=>1, order=>$name),
4783                                      -class => "header"}, $header) .
4784                             "</th>\n";
4785         }
4786
4787         return $sort_th;
4788 }
4789
4790 sub git_project_list_body {
4791         # actually uses global variable $project
4792         my ($projlist, $order, $from, $to, $extra, $no_header) = @_;
4793
4794         my $check_forks = gitweb_check_feature('forks');
4795         my @projects = fill_project_list_info($projlist, $check_forks);
4796
4797         $order ||= $default_projects_order;
4798         $from = 0 unless defined $from;
4799         $to = $#projects if (!defined $to || $#projects < $to);
4800
4801         my %order_info = (
4802                 project => { key => 'path', type => 'str' },
4803                 descr => { key => 'descr_long', type => 'str' },
4804                 owner => { key => 'owner', type => 'str' },
4805                 age => { key => 'age', type => 'num' }
4806         );
4807         my $oi = $order_info{$order};
4808         if ($oi->{'type'} eq 'str') {
4809                 @projects = sort {$a->{$oi->{'key'}} cmp $b->{$oi->{'key'}}} @projects;
4810         } else {
4811                 @projects = sort {$a->{$oi->{'key'}} <=> $b->{$oi->{'key'}}} @projects;
4812         }
4813
4814         my $show_ctags = gitweb_check_feature('ctags');
4815         if ($show_ctags) {
4816                 my %ctags;
4817                 foreach my $p (@projects) {
4818                         foreach my $ct (keys %{$p->{'ctags'}}) {
4819                                 $ctags{$ct} += $p->{'ctags'}->{$ct};
4820                         }
4821                 }
4822                 my $cloud = git_populate_project_tagcloud(\%ctags);
4823                 print git_show_project_tagcloud($cloud, 64);
4824         }
4825
4826         print "<table class=\"project_list\">\n";
4827         unless ($no_header) {
4828                 print "<tr>\n";
4829                 if ($check_forks) {
4830                         print "<th></th>\n";
4831                 }
4832                 print_sort_th('project', $order, 'Project');
4833                 print_sort_th('descr', $order, 'Description');
4834                 print_sort_th('owner', $order, 'Owner');
4835                 print_sort_th('age', $order, 'Last Change');
4836                 print "<th></th>\n" . # for links
4837                       "</tr>\n";
4838         }
4839         my $alternate = 1;
4840         my $tagfilter = $cgi->param('by_tag');
4841         for (my $i = $from; $i <= $to; $i++) {
4842                 my $pr = $projects[$i];
4843
4844                 next if $tagfilter and $show_ctags and not grep { lc $_ eq lc $tagfilter } keys %{$pr->{'ctags'}};
4845                 next if $searchtext and not $pr->{'path'} =~ /$searchtext/
4846                         and not $pr->{'descr_long'} =~ /$searchtext/;
4847                 # Weed out forks or non-matching entries of search
4848                 if ($check_forks) {
4849                         my $forkbase = $project; $forkbase ||= ''; $forkbase =~ s#\.git$#/#;
4850                         $forkbase="^$forkbase" if $forkbase;
4851                         next if not $searchtext and not $tagfilter and $show_ctags
4852                                 and $pr->{'path'} =~ m#$forkbase.*/.*#; # regexp-safe
4853                 }
4854
4855                 if ($alternate) {
4856                         print "<tr class=\"dark\">\n";
4857                 } else {
4858                         print "<tr class=\"light\">\n";
4859                 }
4860                 $alternate ^= 1;
4861                 if ($check_forks) {
4862                         print "<td>";
4863                         if ($pr->{'forks'}) {
4864                                 print "<!-- $pr->{'forks'} -->\n";
4865                                 print $cgi->a({-href => href(project=>$pr->{'path'}, action=>"forks")}, "+");
4866                         }
4867                         print "</td>\n";
4868                 }
4869                 print "<td>" . $cgi->a({-href => href(project=>$pr->{'path'}, action=>"summary"),
4870                                         -class => "list"}, esc_html($pr->{'path'})) . "</td>\n" .
4871                       "<td>" . $cgi->a({-href => href(project=>$pr->{'path'}, action=>"summary"),
4872                                         -class => "list", -title => $pr->{'descr_long'}},
4873                                         esc_html($pr->{'descr'})) . "</td>\n" .
4874                       "<td><i>" . chop_and_escape_str($pr->{'owner'}, 15) . "</i></td>\n";
4875                 print "<td class=\"". age_class($pr->{'age'}) . "\">" .
4876                       (defined $pr->{'age_string'} ? $pr->{'age_string'} : "No commits") . "</td>\n" .
4877                       "<td class=\"link\">" .
4878                       $cgi->a({-href => href(project=>$pr->{'path'}, action=>"summary")}, "summary")   . " | " .
4879                       $cgi->a({-href => href(project=>$pr->{'path'}, action=>"shortlog")}, "shortlog") . " | " .
4880                       $cgi->a({-href => href(project=>$pr->{'path'}, action=>"log")}, "log") . " | " .
4881                       $cgi->a({-href => href(project=>$pr->{'path'}, action=>"tree")}, "tree") .
4882                       ($pr->{'forks'} ? " | " . $cgi->a({-href => href(project=>$pr->{'path'}, action=>"forks")}, "forks") : '') .
4883                       "</td>\n" .
4884                       "</tr>\n";
4885         }
4886         if (defined $extra) {
4887                 print "<tr>\n";
4888                 if ($check_forks) {
4889                         print "<td></td>\n";
4890                 }
4891                 print "<td colspan=\"5\">$extra</td>\n" .
4892                       "</tr>\n";
4893         }
4894         print "</table>\n";
4895 }
4896
4897 sub git_log_body {
4898         # uses global variable $project
4899         my ($commitlist, $from, $to, $refs, $extra) = @_;
4900
4901         $from = 0 unless defined $from;
4902         $to = $#{$commitlist} if (!defined $to || $#{$commitlist} < $to);
4903
4904         for (my $i = 0; $i <= $to; $i++) {
4905                 my %co = %{$commitlist->[$i]};
4906                 next if !%co;
4907                 my $commit = $co{'id'};
4908                 my $ref = format_ref_marker($refs, $commit);
4909                 my %ad = parse_date($co{'author_epoch'});
4910                 git_print_header_div('commit',
4911                                "<span class=\"age\">$co{'age_string'}</span>" .
4912                                esc_html($co{'title'}) . $ref,
4913                                $commit);
4914                 print "<div class=\"title_text\">\n" .
4915                       "<div class=\"log_link\">\n" .
4916                       $cgi->a({-href => href(action=>"commit", hash=>$commit)}, "commit") .
4917                       " | " .
4918                       $cgi->a({-href => href(action=>"commitdiff", hash=>$commit)}, "commitdiff") .
4919                       " | " .
4920                       $cgi->a({-href => href(action=>"tree", hash=>$commit, hash_base=>$commit)}, "tree") .
4921                       "<br/>\n" .
4922                       "</div>\n";
4923                       git_print_authorship(\%co, -tag => 'span');
4924                       print "<br/>\n</div>\n";
4925
4926                 print "<div class=\"log_body\">\n";
4927                 git_print_log($co{'comment'}, -final_empty_line=> 1);
4928                 print "</div>\n";
4929         }
4930         if ($extra) {
4931                 print "<div class=\"page_nav\">\n";
4932                 print "$extra\n";
4933                 print "</div>\n";
4934         }
4935 }
4936
4937 sub git_shortlog_body {
4938         # uses global variable $project
4939         my ($commitlist, $from, $to, $refs, $extra) = @_;
4940
4941         $from = 0 unless defined $from;
4942         $to = $#{$commitlist} if (!defined $to || $#{$commitlist} < $to);
4943
4944         print "<table class=\"shortlog\">\n";
4945         my $alternate = 1;
4946         for (my $i = $from; $i <= $to; $i++) {
4947                 my %co = %{$commitlist->[$i]};
4948                 my $commit = $co{'id'};
4949                 my $ref = format_ref_marker($refs, $commit);
4950                 if ($alternate) {
4951                         print "<tr class=\"dark\">\n";
4952                 } else {
4953                         print "<tr class=\"light\">\n";
4954                 }
4955                 $alternate ^= 1;
4956                 # git_summary() used print "<td><i>$co{'age_string'}</i></td>\n" .
4957                 print "<td title=\"$co{'age_string_age'}\"><i>$co{'age_string_date'}</i></td>\n" .
4958                       format_author_html('td', \%co, 10) . "<td>";
4959                 print format_subject_html($co{'title'}, $co{'title_short'},
4960                                           href(action=>"commit", hash=>$commit), $ref);
4961                 print "</td>\n" .
4962                       "<td class=\"link\">" .
4963                       $cgi->a({-href => href(action=>"commit", hash=>$commit)}, "commit") . " | " .
4964                       $cgi->a({-href => href(action=>"commitdiff", hash=>$commit)}, "commitdiff") . " | " .
4965                       $cgi->a({-href => href(action=>"tree", hash=>$commit, hash_base=>$commit)}, "tree");
4966                 my $snapshot_links = format_snapshot_links($commit);
4967                 if (defined $snapshot_links) {
4968                         print " | " . $snapshot_links;
4969                 }
4970                 print "</td>\n" .
4971                       "</tr>\n";
4972         }
4973         if (defined $extra) {
4974                 print "<tr>\n" .
4975                       "<td colspan=\"4\">$extra</td>\n" .
4976                       "</tr>\n";
4977         }
4978         print "</table>\n";
4979 }
4980
4981 sub git_history_body {
4982         # Warning: assumes constant type (blob or tree) during history
4983         my ($commitlist, $from, $to, $refs, $extra,
4984             $file_name, $file_hash, $ftype) = @_;
4985
4986         $from = 0 unless defined $from;
4987         $to = $#{$commitlist} unless (defined $to && $to <= $#{$commitlist});
4988
4989         print "<table class=\"history\">\n";
4990         my $alternate = 1;
4991         for (my $i = $from; $i <= $to; $i++) {
4992                 my %co = %{$commitlist->[$i]};
4993                 if (!%co) {
4994                         next;
4995                 }
4996                 my $commit = $co{'id'};
4997
4998                 my $ref = format_ref_marker($refs, $commit);
4999
5000                 if ($alternate) {
5001                         print "<tr class=\"dark\">\n";
5002                 } else {
5003                         print "<tr class=\"light\">\n";
5004                 }
5005                 $alternate ^= 1;
5006                 print "<td title=\"$co{'age_string_age'}\"><i>$co{'age_string_date'}</i></td>\n" .
5007         # shortlog:   format_author_html('td', \%co, 10)
5008                       format_author_html('td', \%co, 15, 3) . "<td>";
5009                 # originally git_history used chop_str($co{'title'}, 50)
5010                 print format_subject_html($co{'title'}, $co{'title_short'},
5011                                           href(action=>"commit", hash=>$commit), $ref);
5012                 print "</td>\n" .
5013                       "<td class=\"link\">" .
5014                       $cgi->a({-href => href(action=>$ftype, hash_base=>$commit, file_name=>$file_name)}, $ftype) . " | " .
5015                       $cgi->a({-href => href(action=>"commitdiff", hash=>$commit)}, "commitdiff");
5016
5017                 if ($ftype eq 'blob') {
5018                         my $blob_current = $file_hash;
5019                         my $blob_parent  = git_get_hash_by_path($commit, $file_name);
5020                         if (defined $blob_current && defined $blob_parent &&
5021                                         $blob_current ne $blob_parent) {
5022                                 print " | " .
5023                                         $cgi->a({-href => href(action=>"blobdiff",
5024                                                                hash=>$blob_current, hash_parent=>$blob_parent,
5025                                                                hash_base=>$hash_base, hash_parent_base=>$commit,
5026                                                                file_name=>$file_name)},
5027                                                 "diff to current");
5028                         }
5029                 }
5030                 print "</td>\n" .
5031                       "</tr>\n";
5032         }
5033         if (defined $extra) {
5034                 print "<tr>\n" .
5035                       "<td colspan=\"4\">$extra</td>\n" .
5036                       "</tr>\n";
5037         }
5038         print "</table>\n";
5039 }
5040
5041 sub git_tags_body {
5042         # uses global variable $project
5043         my ($taglist, $from, $to, $extra) = @_;
5044         $from = 0 unless defined $from;
5045         $to = $#{$taglist} if (!defined $to || $#{$taglist} < $to);
5046
5047         print "<table class=\"tags\">\n";
5048         my $alternate = 1;
5049         for (my $i = $from; $i <= $to; $i++) {
5050                 my $entry = $taglist->[$i];
5051                 my %tag = %$entry;
5052                 my $comment = $tag{'subject'};
5053                 my $comment_short;
5054                 if (defined $comment) {
5055                         $comment_short = chop_str($comment, 30, 5);
5056                 }
5057                 if ($alternate) {
5058                         print "<tr class=\"dark\">\n";
5059                 } else {
5060                         print "<tr class=\"light\">\n";
5061                 }
5062                 $alternate ^= 1;
5063                 if (defined $tag{'age'}) {
5064                         print "<td><i>$tag{'age'}</i></td>\n";
5065                 } else {
5066                         print "<td></td>\n";
5067                 }
5068                 print "<td>" .
5069                       $cgi->a({-href => href(action=>$tag{'reftype'}, hash=>$tag{'refid'}),
5070                                -class => "list name"}, esc_html($tag{'name'})) .
5071                       "</td>\n" .
5072                       "<td>";
5073                 if (defined $comment) {
5074                         print format_subject_html($comment, $comment_short,
5075                                                   href(action=>"tag", hash=>$tag{'id'}));
5076                 }
5077                 print "</td>\n" .
5078                       "<td class=\"selflink\">";
5079                 if ($tag{'type'} eq "tag") {
5080                         print $cgi->a({-href => href(action=>"tag", hash=>$tag{'id'})}, "tag");
5081                 } else {
5082                         print "&nbsp;";
5083                 }
5084                 print "</td>\n" .
5085                       "<td class=\"link\">" . " | " .
5086                       $cgi->a({-href => href(action=>$tag{'reftype'}, hash=>$tag{'refid'})}, $tag{'reftype'});
5087                 if ($tag{'reftype'} eq "commit") {
5088                         print " | " . $cgi->a({-href => href(action=>"shortlog", hash=>$tag{'fullname'})}, "shortlog") .
5089                               " | " . $cgi->a({-href => href(action=>"log", hash=>$tag{'fullname'})}, "log");
5090                 } elsif ($tag{'reftype'} eq "blob") {
5091                         print " | " . $cgi->a({-href => href(action=>"blob_plain", hash=>$tag{'refid'})}, "raw");
5092                 }
5093                 print "</td>\n" .
5094                       "</tr>";
5095         }
5096         if (defined $extra) {
5097                 print "<tr>\n" .
5098                       "<td colspan=\"5\">$extra</td>\n" .
5099                       "</tr>\n";
5100         }
5101         print "</table>\n";
5102 }
5103
5104 sub git_heads_body {
5105         # uses global variable $project
5106         my ($headlist, $head, $from, $to, $extra) = @_;
5107         $from = 0 unless defined $from;
5108         $to = $#{$headlist} if (!defined $to || $#{$headlist} < $to);
5109
5110         print "<table class=\"heads\">\n";
5111         my $alternate = 1;
5112         for (my $i = $from; $i <= $to; $i++) {
5113                 my $entry = $headlist->[$i];
5114                 my %ref = %$entry;
5115                 my $curr = $ref{'id'} eq $head;
5116                 if ($alternate) {
5117                         print "<tr class=\"dark\">\n";
5118                 } else {
5119                         print "<tr class=\"light\">\n";
5120                 }
5121                 $alternate ^= 1;
5122                 print "<td><i>$ref{'age'}</i></td>\n" .
5123                       ($curr ? "<td class=\"current_head\">" : "<td>") .
5124                       $cgi->a({-href => href(action=>"shortlog", hash=>$ref{'fullname'}),
5125                                -class => "list name"},esc_html($ref{'name'})) .
5126                       "</td>\n" .
5127                       "<td class=\"link\">" .
5128                       $cgi->a({-href => href(action=>"shortlog", hash=>$ref{'fullname'})}, "shortlog") . " | " .
5129                       $cgi->a({-href => href(action=>"log", hash=>$ref{'fullname'})}, "log") . " | " .
5130                       $cgi->a({-href => href(action=>"tree", hash=>$ref{'fullname'}, hash_base=>$ref{'fullname'})}, "tree") .
5131                       "</td>\n" .
5132                       "</tr>";
5133         }
5134         if (defined $extra) {
5135                 print "<tr>\n" .
5136                       "<td colspan=\"3\">$extra</td>\n" .
5137                       "</tr>\n";
5138         }
5139         print "</table>\n";
5140 }
5141
5142 # Display a single remote block
5143 sub git_remote_block {
5144         my ($remote, $rdata, $limit, $head) = @_;
5145
5146         my $heads = $rdata->{'heads'};
5147         my $fetch = $rdata->{'fetch'};
5148         my $push = $rdata->{'push'};
5149
5150         my $urls_table = "<table class=\"projects_list\">\n" ;
5151
5152         if (defined $fetch) {
5153                 if ($fetch eq $push) {
5154                         $urls_table .= format_repo_url("URL", $fetch);
5155                 } else {
5156                         $urls_table .= format_repo_url("Fetch URL", $fetch);
5157                         $urls_table .= format_repo_url("Push URL", $push) if defined $push;
5158                 }
5159         } elsif (defined $push) {
5160                 $urls_table .= format_repo_url("Push URL", $push);
5161         } else {
5162                 $urls_table .= format_repo_url("", "No remote URL");
5163         }
5164
5165         $urls_table .= "</table>\n";
5166
5167         my $dots;
5168         if (defined $limit && $limit < @$heads) {
5169                 $dots = $cgi->a({-href => href(action=>"remotes", hash=>$remote)}, "...");
5170         }
5171
5172         print $urls_table;
5173         git_heads_body($heads, $head, 0, $limit, $dots);
5174 }
5175
5176 # Display a list of remote names with the respective fetch and push URLs
5177 sub git_remotes_list {
5178         my ($remotedata, $limit) = @_;
5179         print "<table class=\"heads\">\n";
5180         my $alternate = 1;
5181         my @remotes = sort keys %$remotedata;
5182
5183         my $limited = $limit && $limit < @remotes;
5184
5185         $#remotes = $limit - 1 if $limited;
5186
5187         while (my $remote = shift @remotes) {
5188                 my $rdata = $remotedata->{$remote};
5189                 my $fetch = $rdata->{'fetch'};
5190                 my $push = $rdata->{'push'};
5191                 if ($alternate) {
5192                         print "<tr class=\"dark\">\n";
5193                 } else {
5194                         print "<tr class=\"light\">\n";
5195                 }
5196                 $alternate ^= 1;
5197                 print "<td>" .
5198                       $cgi->a({-href=> href(action=>'remotes', hash=>$remote),
5199                                -class=> "list name"},esc_html($remote)) .
5200                       "</td>";
5201                 print "<td class=\"link\">" .
5202                       (defined $fetch ? $cgi->a({-href=> $fetch}, "fetch") : "fetch") .
5203                       " | " .
5204                       (defined $push ? $cgi->a({-href=> $push}, "push") : "push") .
5205                       "</td>";
5206
5207                 print "</tr>\n";
5208         }
5209
5210         if ($limited) {
5211                 print "<tr>\n" .
5212                       "<td colspan=\"3\">" .
5213                       $cgi->a({-href => href(action=>"remotes")}, "...") .
5214                       "</td>\n" . "</tr>\n";
5215         }
5216
5217         print "</table>";
5218 }
5219
5220 # Display remote heads grouped by remote, unless there are too many
5221 # remotes, in which case we only display the remote names
5222 sub git_remotes_body {
5223         my ($remotedata, $limit, $head) = @_;
5224         if ($limit and $limit < keys %$remotedata) {
5225                 git_remotes_list($remotedata, $limit);
5226         } else {
5227                 fill_remote_heads($remotedata);
5228                 while (my ($remote, $rdata) = each %$remotedata) {
5229                         git_print_section({-class=>"remote", -id=>$remote},
5230                                 ["remotes", $remote, $remote], sub {
5231                                         git_remote_block($remote, $rdata, $limit, $head);
5232                                 });
5233                 }
5234         }
5235 }
5236
5237 sub git_search_grep_body {
5238         my ($commitlist, $from, $to, $extra) = @_;
5239         $from = 0 unless defined $from;
5240         $to = $#{$commitlist} if (!defined $to || $#{$commitlist} < $to);
5241
5242         print "<table class=\"commit_search\">\n";
5243         my $alternate = 1;
5244         for (my $i = $from; $i <= $to; $i++) {
5245                 my %co = %{$commitlist->[$i]};
5246                 if (!%co) {
5247                         next;
5248                 }
5249                 my $commit = $co{'id'};
5250                 if ($alternate) {
5251                         print "<tr class=\"dark\">\n";
5252                 } else {
5253                         print "<tr class=\"light\">\n";
5254                 }
5255                 $alternate ^= 1;
5256                 print "<td title=\"$co{'age_string_age'}\"><i>$co{'age_string_date'}</i></td>\n" .
5257                       format_author_html('td', \%co, 15, 5) .
5258                       "<td>" .
5259                       $cgi->a({-href => href(action=>"commit", hash=>$co{'id'}),
5260                                -class => "list subject"},
5261                               chop_and_escape_str($co{'title'}, 50) . "<br/>");
5262                 my $comment = $co{'comment'};
5263                 foreach my $line (@$comment) {
5264                         if ($line =~ m/^(.*?)($search_regexp)(.*)$/i) {
5265                                 my ($lead, $match, $trail) = ($1, $2, $3);
5266                                 $match = chop_str($match, 70, 5, 'center');
5267                                 my $contextlen = int((80 - length($match))/2);
5268                                 $contextlen = 30 if ($contextlen > 30);
5269                                 $lead  = chop_str($lead,  $contextlen, 10, 'left');
5270                                 $trail = chop_str($trail, $contextlen, 10, 'right');
5271
5272                                 $lead  = esc_html($lead);
5273                                 $match = esc_html($match);
5274                                 $trail = esc_html($trail);
5275
5276                                 print "$lead<span class=\"match\">$match</span>$trail<br />";
5277                         }
5278                 }
5279                 print "</td>\n" .
5280                       "<td class=\"link\">" .
5281                       $cgi->a({-href => href(action=>"commit", hash=>$co{'id'})}, "commit") .
5282                       " | " .
5283                       $cgi->a({-href => href(action=>"commitdiff", hash=>$co{'id'})}, "commitdiff") .
5284                       " | " .
5285                       $cgi->a({-href => href(action=>"tree", hash=>$co{'tree'}, hash_base=>$co{'id'})}, "tree");
5286                 print "</td>\n" .
5287                       "</tr>\n";
5288         }
5289         if (defined $extra) {
5290                 print "<tr>\n" .
5291                       "<td colspan=\"3\">$extra</td>\n" .
5292                       "</tr>\n";
5293         }
5294         print "</table>\n";
5295 }
5296
5297 ## ======================================================================
5298 ## ======================================================================
5299 ## actions
5300
5301 sub git_project_list {
5302         my $order = $input_params{'order'};
5303         if (defined $order && $order !~ m/none|project|descr|owner|age/) {
5304                 die_error(400, "Unknown order parameter");
5305         }
5306
5307         my @list = git_get_projects_list();
5308         if (!@list) {
5309                 die_error(404, "No projects found");
5310         }
5311
5312         git_header_html();
5313         if (defined $home_text && -f $home_text) {
5314                 print "<div class=\"index_include\">\n";
5315                 insert_file($home_text);
5316                 print "</div>\n";
5317         }
5318         print $cgi->startform(-method => "get") .
5319               "<p class=\"projsearch\">Search:\n" .
5320               $cgi->textfield(-name => "s", -value => $searchtext) . "\n" .
5321               "</p>" .
5322               $cgi->end_form() . "\n";
5323         git_project_list_body(\@list, $order);
5324         git_footer_html();
5325 }
5326
5327 sub git_forks {
5328         my $order = $input_params{'order'};
5329         if (defined $order && $order !~ m/none|project|descr|owner|age/) {
5330                 die_error(400, "Unknown order parameter");
5331         }
5332
5333         my @list = git_get_projects_list($project);
5334         if (!@list) {
5335                 die_error(404, "No forks found");
5336         }
5337
5338         git_header_html();
5339         git_print_page_nav('','');
5340         git_print_header_div('summary', "$project forks");
5341         git_project_list_body(\@list, $order);
5342         git_footer_html();
5343 }
5344
5345 sub git_project_index {
5346         my @projects = git_get_projects_list($project);
5347
5348         print $cgi->header(
5349                 -type => 'text/plain',
5350                 -charset => 'utf-8',
5351                 -content_disposition => 'inline; filename="index.aux"');
5352
5353         foreach my $pr (@projects) {
5354                 if (!exists $pr->{'owner'}) {
5355                         $pr->{'owner'} = git_get_project_owner("$pr->{'path'}");
5356                 }
5357
5358                 my ($path, $owner) = ($pr->{'path'}, $pr->{'owner'});
5359                 # quote as in CGI::Util::encode, but keep the slash, and use '+' for ' '
5360                 $path  =~ s/([^a-zA-Z0-9_.\-\/ ])/sprintf("%%%02X", ord($1))/eg;
5361                 $owner =~ s/([^a-zA-Z0-9_.\-\/ ])/sprintf("%%%02X", ord($1))/eg;
5362                 $path  =~ s/ /\+/g;
5363                 $owner =~ s/ /\+/g;
5364
5365                 print "$path $owner\n";
5366         }
5367 }
5368
5369 sub git_summary {
5370         my $descr = git_get_project_description($project) || "none";
5371         my %co = parse_commit("HEAD");
5372         my %cd = %co ? parse_date($co{'committer_epoch'}, $co{'committer_tz'}) : ();
5373         my $head = $co{'id'};
5374         my $remote_heads = gitweb_check_feature('remote_heads');
5375
5376         my $owner = git_get_project_owner($project);
5377
5378         my $refs = git_get_references();
5379         # These get_*_list functions return one more to allow us to see if
5380         # there are more ...
5381         my @taglist  = git_get_tags_list(16);
5382         my @headlist = git_get_heads_list(16);
5383         my %remotedata = $remote_heads ? git_get_remotes_list() : ();
5384         my @forklist;
5385         my $check_forks = gitweb_check_feature('forks');
5386
5387         if ($check_forks) {
5388                 @forklist = git_get_projects_list($project);
5389         }
5390
5391         git_header_html();
5392         git_print_page_nav('summary','', $head);
5393
5394         print "<div class=\"title\">&nbsp;</div>\n";
5395         print "<table class=\"projects_list\">\n" .
5396               "<tr id=\"metadata_desc\"><td>description</td><td>" . esc_html($descr) . "</td></tr>\n" .
5397               "<tr id=\"metadata_owner\"><td>owner</td><td>" . esc_html($owner) . "</td></tr>\n";
5398         if (defined $cd{'rfc2822'}) {
5399                 print "<tr id=\"metadata_lchange\"><td>last change</td><td>$cd{'rfc2822'}</td></tr>\n";
5400         }
5401
5402         # use per project git URL list in $projectroot/$project/cloneurl
5403         # or make project git URL from git base URL and project name
5404         my $url_tag = "URL";
5405         my @url_list = git_get_project_url_list($project);
5406         @url_list = map { "$_/$project" } @git_base_url_list unless @url_list;
5407         foreach my $git_url (@url_list) {
5408                 next unless $git_url;
5409                 print format_repo_url($url_tag, $git_url);
5410                 $url_tag = "";
5411         }
5412
5413         # Tag cloud
5414         my $show_ctags = gitweb_check_feature('ctags');
5415         if ($show_ctags) {
5416                 my $ctags = git_get_project_ctags($project);
5417                 my $cloud = git_populate_project_tagcloud($ctags);
5418                 print "<tr id=\"metadata_ctags\"><td>Content tags:<br />";
5419                 print "</td>\n<td>" unless %$ctags;
5420                 print "<form action=\"$show_ctags\" method=\"post\"><input type=\"hidden\" name=\"p\" value=\"$project\" />Add: <input type=\"text\" name=\"t\" size=\"8\" /></form>";
5421                 print "</td>\n<td>" if %$ctags;
5422                 print git_show_project_tagcloud($cloud, 48);
5423                 print "</td></tr>";
5424         }
5425
5426         print "</table>\n";
5427
5428         # If XSS prevention is on, we don't include README.html.
5429         # TODO: Allow a readme in some safe format.
5430         if (!$prevent_xss && -s "$projectroot/$project/README.html") {
5431                 print "<div class=\"title\">readme</div>\n" .
5432                       "<div class=\"readme\">\n";
5433                 insert_file("$projectroot/$project/README.html");
5434                 print "\n</div>\n"; # class="readme"
5435         }
5436
5437         # we need to request one more than 16 (0..15) to check if
5438         # those 16 are all
5439         my @commitlist = $head ? parse_commits($head, 17) : ();
5440         if (@commitlist) {
5441                 git_print_header_div('shortlog');
5442                 git_shortlog_body(\@commitlist, 0, 15, $refs,
5443                                   $#commitlist <=  15 ? undef :
5444                                   $cgi->a({-href => href(action=>"shortlog")}, "..."));
5445         }
5446
5447         if (@taglist) {
5448                 git_print_header_div('tags');
5449                 git_tags_body(\@taglist, 0, 15,
5450                               $#taglist <=  15 ? undef :
5451                               $cgi->a({-href => href(action=>"tags")}, "..."));
5452         }
5453
5454         if (@headlist) {
5455                 git_print_header_div('heads');
5456                 git_heads_body(\@headlist, $head, 0, 15,
5457                                $#headlist <= 15 ? undef :
5458                                $cgi->a({-href => href(action=>"heads")}, "..."));
5459         }
5460
5461         if (%remotedata) {
5462                 git_print_header_div('remotes');
5463                 git_remotes_body(\%remotedata, 15, $head);
5464         }
5465
5466         if (@forklist) {
5467                 git_print_header_div('forks');
5468                 git_project_list_body(\@forklist, 'age', 0, 15,
5469                                       $#forklist <= 15 ? undef :
5470                                       $cgi->a({-href => href(action=>"forks")}, "..."),
5471                                       'no_header');
5472         }
5473
5474         git_footer_html();
5475 }
5476
5477 sub git_tag {
5478         my %tag = parse_tag($hash);
5479
5480         if (! %tag) {
5481                 die_error(404, "Unknown tag object");
5482         }
5483
5484         my $head = git_get_head_hash($project);
5485         git_header_html();
5486         git_print_page_nav('','', $head,undef,$head);
5487         git_print_header_div('commit', esc_html($tag{'name'}), $hash);
5488         print "<div class=\"title_text\">\n" .
5489               "<table class=\"object_header\">\n" .
5490               "<tr>\n" .
5491               "<td>object</td>\n" .
5492               "<td>" . $cgi->a({-class => "list", -href => href(action=>$tag{'type'}, hash=>$tag{'object'})},
5493                                $tag{'object'}) . "</td>\n" .
5494               "<td class=\"link\">" . $cgi->a({-href => href(action=>$tag{'type'}, hash=>$tag{'object'})},
5495                                               $tag{'type'}) . "</td>\n" .
5496               "</tr>\n";
5497         if (defined($tag{'author'})) {
5498                 git_print_authorship_rows(\%tag, 'author');
5499         }
5500         print "</table>\n\n" .
5501               "</div>\n";
5502         print "<div class=\"page_body\">";
5503         my $comment = $tag{'comment'};
5504         foreach my $line (@$comment) {
5505                 chomp $line;
5506                 print esc_html($line, -nbsp=>1) . "<br/>\n";
5507         }
5508         print "</div>\n";
5509         git_footer_html();
5510 }
5511
5512 sub git_blame_common {
5513         my $format = shift || 'porcelain';
5514         if ($format eq 'porcelain' && $cgi->param('js')) {
5515                 $format = 'incremental';
5516                 $action = 'blame_incremental'; # for page title etc
5517         }
5518
5519         # permissions
5520         gitweb_check_feature('blame')
5521                 or die_error(403, "Blame view not allowed");
5522
5523         # error checking
5524         die_error(400, "No file name given") unless $file_name;
5525         $hash_base ||= git_get_head_hash($project);
5526         die_error(404, "Couldn't find base commit") unless $hash_base;
5527         my %co = parse_commit($hash_base)
5528                 or die_error(404, "Commit not found");
5529         my $ftype = "blob";
5530         if (!defined $hash) {
5531                 $hash = git_get_hash_by_path($hash_base, $file_name, "blob")
5532                         or die_error(404, "Error looking up file");
5533         } else {
5534                 $ftype = git_get_type($hash);
5535                 if ($ftype !~ "blob") {
5536                         die_error(400, "Object is not a blob");
5537                 }
5538         }
5539
5540         my $fd;
5541         if ($format eq 'incremental') {
5542                 # get file contents (as base)
5543                 open $fd, "-|", git_cmd(), 'cat-file', 'blob', $hash
5544                         or die_error(500, "Open git-cat-file failed");
5545         } elsif ($format eq 'data') {
5546                 # run git-blame --incremental
5547                 open $fd, "-|", git_cmd(), "blame", "--incremental",
5548                         $hash_base, "--", $file_name
5549                         or die_error(500, "Open git-blame --incremental failed");
5550         } else {
5551                 # run git-blame --porcelain
5552                 open $fd, "-|", git_cmd(), "blame", '-p',
5553                         $hash_base, '--', $file_name
5554                         or die_error(500, "Open git-blame --porcelain failed");
5555         }
5556
5557         # incremental blame data returns early
5558         if ($format eq 'data') {
5559                 print $cgi->header(
5560                         -type=>"text/plain", -charset => "utf-8",
5561                         -status=> "200 OK");
5562                 local $| = 1; # output autoflush
5563                 print while <$fd>;
5564                 close $fd
5565                         or print "ERROR $!\n";
5566
5567                 print 'END';
5568                 if (defined $t0 && gitweb_check_feature('timed')) {
5569                         print ' '.
5570                               tv_interval($t0, [ gettimeofday() ]).
5571                               ' '.$number_of_git_cmds;
5572                 }
5573                 print "\n";
5574
5575                 return;
5576         }
5577
5578         # page header
5579         git_header_html();
5580         my $formats_nav =
5581                 $cgi->a({-href => href(action=>"blob", -replay=>1)},
5582                         "blob") .
5583                 " | ";
5584         if ($format eq 'incremental') {
5585                 $formats_nav .=
5586                         $cgi->a({-href => href(action=>"blame", javascript=>0, -replay=>1)},
5587                                 "blame") . " (non-incremental)";
5588         } else {
5589                 $formats_nav .=
5590                         $cgi->a({-href => href(action=>"blame_incremental", -replay=>1)},
5591                                 "blame") . " (incremental)";
5592         }
5593         $formats_nav .=
5594                 " | " .
5595                 $cgi->a({-href => href(action=>"history", -replay=>1)},
5596                         "history") .
5597                 " | " .
5598                 $cgi->a({-href => href(action=>$action, file_name=>$file_name)},
5599                         "HEAD");
5600         git_print_page_nav('','', $hash_base,$co{'tree'},$hash_base, $formats_nav);
5601         git_print_header_div('commit', esc_html($co{'title'}), $hash_base);
5602         git_print_page_path($file_name, $ftype, $hash_base);
5603
5604         # page body
5605         if ($format eq 'incremental') {
5606                 print "<noscript>\n<div class=\"error\"><center><b>\n".
5607                       "This page requires JavaScript to run.\n Use ".
5608                       $cgi->a({-href => href(action=>'blame',javascript=>0,-replay=>1)},
5609                               'this page').
5610                       " instead.\n".
5611                       "</b></center></div>\n</noscript>\n";
5612
5613                 print qq!<div id="progress_bar" style="width: 100%; background-color: yellow"></div>\n!;
5614         }
5615
5616         print qq!<div class="page_body">\n!;
5617         print qq!<div id="progress_info">... / ...</div>\n!
5618                 if ($format eq 'incremental');
5619         print qq!<table id="blame_table" class="blame" width="100%">\n!.
5620               #qq!<col width="5.5em" /><col width="2.5em" /><col width="*" />\n!.
5621               qq!<thead>\n!.
5622               qq!<tr><th>Commit</th><th>Line</th><th>Data</th></tr>\n!.
5623               qq!</thead>\n!.
5624               qq!<tbody>\n!;
5625
5626         my @rev_color = qw(light dark);
5627         my $num_colors = scalar(@rev_color);
5628         my $current_color = 0;
5629
5630         if ($format eq 'incremental') {
5631                 my $color_class = $rev_color[$current_color];
5632
5633                 #contents of a file
5634                 my $linenr = 0;
5635         LINE:
5636                 while (my $line = <$fd>) {
5637                         chomp $line;
5638                         $linenr++;
5639
5640                         print qq!<tr id="l$linenr" class="$color_class">!.
5641                               qq!<td class="sha1"><a href=""> </a></td>!.
5642                               qq!<td class="linenr">!.
5643                               qq!<a class="linenr" href="">$linenr</a></td>!;
5644                         print qq!<td class="pre">! . esc_html($line) . "</td>\n";
5645                         print qq!</tr>\n!;
5646                 }
5647
5648         } else { # porcelain, i.e. ordinary blame
5649                 my %metainfo = (); # saves information about commits
5650
5651                 # blame data
5652         LINE:
5653                 while (my $line = <$fd>) {
5654                         chomp $line;
5655                         # the header: <SHA-1> <src lineno> <dst lineno> [<lines in group>]
5656                         # no <lines in group> for subsequent lines in group of lines
5657                         my ($full_rev, $orig_lineno, $lineno, $group_size) =
5658                            ($line =~ /^([0-9a-f]{40}) (\d+) (\d+)(?: (\d+))?$/);
5659                         if (!exists $metainfo{$full_rev}) {
5660                                 $metainfo{$full_rev} = { 'nprevious' => 0 };
5661                         }
5662                         my $meta = $metainfo{$full_rev};
5663                         my $data;
5664                         while ($data = <$fd>) {
5665                                 chomp $data;
5666                                 last if ($data =~ s/^\t//); # contents of line
5667                                 if ($data =~ /^(\S+)(?: (.*))?$/) {
5668                                         $meta->{$1} = $2 unless exists $meta->{$1};
5669                                 }
5670                                 if ($data =~ /^previous /) {
5671                                         $meta->{'nprevious'}++;
5672                                 }
5673                         }
5674                         my $short_rev = substr($full_rev, 0, 8);
5675                         my $author = $meta->{'author'};
5676                         my %date =
5677                                 parse_date($meta->{'author-time'}, $meta->{'author-tz'});
5678                         my $date = $date{'iso-tz'};
5679                         if ($group_size) {
5680                                 $current_color = ($current_color + 1) % $num_colors;
5681                         }
5682                         my $tr_class = $rev_color[$current_color];
5683                         $tr_class .= ' boundary' if (exists $meta->{'boundary'});
5684                         $tr_class .= ' no-previous' if ($meta->{'nprevious'} == 0);
5685                         $tr_class .= ' multiple-previous' if ($meta->{'nprevious'} > 1);
5686                         print "<tr id=\"l$lineno\" class=\"$tr_class\">\n";
5687                         if ($group_size) {
5688                                 print "<td class=\"sha1\"";
5689                                 print " title=\"". esc_html($author) . ", $date\"";
5690                                 print " rowspan=\"$group_size\"" if ($group_size > 1);
5691                                 print ">";
5692                                 print $cgi->a({-href => href(action=>"commit",
5693                                                              hash=>$full_rev,
5694                                                              file_name=>$file_name)},
5695                                               esc_html($short_rev));
5696                                 if ($group_size >= 2) {
5697                                         my @author_initials = ($author =~ /\b([[:upper:]])\B/g);
5698                                         if (@author_initials) {
5699                                                 print "<br />" .
5700                                                       esc_html(join('', @author_initials));
5701                                                 #           or join('.', ...)
5702                                         }
5703                                 }
5704                                 print "</td>\n";
5705                         }
5706                         # 'previous' <sha1 of parent commit> <filename at commit>
5707                         if (exists $meta->{'previous'} &&
5708                             $meta->{'previous'} =~ /^([a-fA-F0-9]{40}) (.*)$/) {
5709                                 $meta->{'parent'} = $1;
5710                                 $meta->{'file_parent'} = unquote($2);
5711                         }
5712                         my $linenr_commit =
5713                                 exists($meta->{'parent'}) ?
5714                                 $meta->{'parent'} : $full_rev;
5715                         my $linenr_filename =
5716                                 exists($meta->{'file_parent'}) ?
5717                                 $meta->{'file_parent'} : unquote($meta->{'filename'});
5718                         my $blamed = href(action => 'blame',
5719                                           file_name => $linenr_filename,
5720                                           hash_base => $linenr_commit);
5721                         print "<td class=\"linenr\">";
5722                         print $cgi->a({ -href => "$blamed#l$orig_lineno",
5723                                         -class => "linenr" },
5724                                       esc_html($lineno));
5725                         print "</td>";
5726                         print "<td class=\"pre\">" . esc_html($data) . "</td>\n";
5727                         print "</tr>\n";
5728                 } # end while
5729
5730         }
5731
5732         # footer
5733         print "</tbody>\n".
5734               "</table>\n"; # class="blame"
5735         print "</div>\n";   # class="blame_body"
5736         close $fd
5737                 or print "Reading blob failed\n";
5738
5739         git_footer_html();
5740 }
5741
5742 sub git_blame {
5743         git_blame_common();
5744 }
5745
5746 sub git_blame_incremental {
5747         git_blame_common('incremental');
5748 }
5749
5750 sub git_blame_data {
5751         git_blame_common('data');
5752 }
5753
5754 sub git_tags {
5755         my $head = git_get_head_hash($project);
5756         git_header_html();
5757         git_print_page_nav('','', $head,undef,$head,format_ref_views('tags'));
5758         git_print_header_div('summary', $project);
5759
5760         my @tagslist = git_get_tags_list();
5761         if (@tagslist) {
5762                 git_tags_body(\@tagslist);
5763         }
5764         git_footer_html();
5765 }
5766
5767 sub git_heads {
5768         my $head = git_get_head_hash($project);
5769         git_header_html();
5770         git_print_page_nav('','', $head,undef,$head,format_ref_views('heads'));
5771         git_print_header_div('summary', $project);
5772
5773         my @headslist = git_get_heads_list();
5774         if (@headslist) {
5775                 git_heads_body(\@headslist, $head);
5776         }
5777         git_footer_html();
5778 }
5779
5780 # used both for single remote view and for list of all the remotes
5781 sub git_remotes {
5782         gitweb_check_feature('remote_heads')
5783                 or die_error(403, "Remote heads view is disabled");
5784
5785         my $head = git_get_head_hash($project);
5786         my $remote = $input_params{'hash'};
5787
5788         my $remotedata = git_get_remotes_list($remote);
5789         die_error(500, "Unable to get remote information") unless defined $remotedata;
5790
5791         unless (%$remotedata) {
5792                 die_error(404, defined $remote ?
5793                         "Remote $remote not found" :
5794                         "No remotes found");
5795         }
5796
5797         git_header_html(undef, undef, -action_extra => $remote);
5798         git_print_page_nav('', '',  $head, undef, $head,
5799                 format_ref_views($remote ? '' : 'remotes'));
5800
5801         fill_remote_heads($remotedata);
5802         if (defined $remote) {
5803                 git_print_header_div('remotes', "$remote remote for $project");
5804                 git_remote_block($remote, $remotedata->{$remote}, undef, $head);
5805         } else {
5806                 git_print_header_div('summary', "$project remotes");
5807                 git_remotes_body($remotedata, undef, $head);
5808         }
5809
5810         git_footer_html();
5811 }
5812
5813 sub git_blob_plain {
5814         my $type = shift;
5815         my $expires;
5816
5817         if (!defined $hash) {
5818                 if (defined $file_name) {
5819                         my $base = $hash_base || git_get_head_hash($project);
5820                         $hash = git_get_hash_by_path($base, $file_name, "blob")
5821                                 or die_error(404, "Cannot find file");
5822                 } else {
5823                         die_error(400, "No file name defined");
5824                 }
5825         } elsif ($hash =~ m/^[0-9a-fA-F]{40}$/) {
5826                 # blobs defined by non-textual hash id's can be cached
5827                 $expires = "+1d";
5828         }
5829
5830         open my $fd, "-|", git_cmd(), "cat-file", "blob", $hash
5831                 or die_error(500, "Open git-cat-file blob '$hash' failed");
5832
5833         # content-type (can include charset)
5834         $type = blob_contenttype($fd, $file_name, $type);
5835
5836         # "save as" filename, even when no $file_name is given
5837         my $save_as = "$hash";
5838         if (defined $file_name) {
5839                 $save_as = $file_name;
5840         } elsif ($type =~ m/^text\//) {
5841                 $save_as .= '.txt';
5842         }
5843
5844         # With XSS prevention on, blobs of all types except a few known safe
5845         # ones are served with "Content-Disposition: attachment" to make sure
5846         # they don't run in our security domain.  For certain image types,
5847         # blob view writes an <img> tag referring to blob_plain view, and we
5848         # want to be sure not to break that by serving the image as an
5849         # attachment (though Firefox 3 doesn't seem to care).
5850         my $sandbox = $prevent_xss &&
5851                 $type !~ m!^(?:text/plain|image/(?:gif|png|jpeg))$!;
5852
5853         print $cgi->header(
5854                 -type => $type,
5855                 -expires => $expires,
5856                 -content_disposition =>
5857                         ($sandbox ? 'attachment' : 'inline')
5858                         . '; filename="' . $save_as . '"');
5859         local $/ = undef;
5860         binmode STDOUT, ':raw';
5861         print <$fd>;
5862         binmode STDOUT, ':utf8'; # as set at the beginning of gitweb.cgi
5863         close $fd;
5864 }
5865
5866 sub git_blob {
5867         my $expires;
5868
5869         if (!defined $hash) {
5870                 if (defined $file_name) {
5871                         my $base = $hash_base || git_get_head_hash($project);
5872                         $hash = git_get_hash_by_path($base, $file_name, "blob")
5873                                 or die_error(404, "Cannot find file");
5874                 } else {
5875                         die_error(400, "No file name defined");
5876                 }
5877         } elsif ($hash =~ m/^[0-9a-fA-F]{40}$/) {
5878                 # blobs defined by non-textual hash id's can be cached
5879                 $expires = "+1d";
5880         }
5881
5882         my $have_blame = gitweb_check_feature('blame');
5883         open my $fd, "-|", git_cmd(), "cat-file", "blob", $hash
5884                 or die_error(500, "Couldn't cat $file_name, $hash");
5885         my $mimetype = blob_mimetype($fd, $file_name);
5886         # use 'blob_plain' (aka 'raw') view for files that cannot be displayed
5887         if ($mimetype !~ m!^(?:text/|image/(?:gif|png|jpeg)$)! && -B $fd) {
5888                 close $fd;
5889                 return git_blob_plain($mimetype);
5890         }
5891         # we can have blame only for text/* mimetype
5892         $have_blame &&= ($mimetype =~ m!^text/!);
5893
5894         my $highlight = gitweb_check_feature('highlight');
5895         my $syntax = guess_file_syntax($highlight, $mimetype, $file_name);
5896         $fd = run_highlighter($fd, $highlight, $syntax)
5897                 if $syntax;
5898
5899         git_header_html(undef, $expires);
5900         my $formats_nav = '';
5901         if (defined $hash_base && (my %co = parse_commit($hash_base))) {
5902                 if (defined $file_name) {
5903                         if ($have_blame) {
5904                                 $formats_nav .=
5905                                         $cgi->a({-href => href(action=>"blame", -replay=>1)},
5906                                                 "blame") .
5907                                         " | ";
5908                         }
5909                         $formats_nav .=
5910                                 $cgi->a({-href => href(action=>"history", -replay=>1)},
5911                                         "history") .
5912                                 " | " .
5913                                 $cgi->a({-href => href(action=>"blob_plain", -replay=>1)},
5914                                         "raw") .
5915                                 " | " .
5916                                 $cgi->a({-href => href(action=>"blob",
5917                                                        hash_base=>"HEAD", file_name=>$file_name)},
5918                                         "HEAD");
5919                 } else {
5920                         $formats_nav .=
5921                                 $cgi->a({-href => href(action=>"blob_plain", -replay=>1)},
5922                                         "raw");
5923                 }
5924                 git_print_page_nav('','', $hash_base,$co{'tree'},$hash_base, $formats_nav);
5925                 git_print_header_div('commit', esc_html($co{'title'}), $hash_base);
5926         } else {
5927                 print "<div class=\"page_nav\">\n" .
5928                       "<br/><br/></div>\n" .
5929                       "<div class=\"title\">".esc_html($hash)."</div>\n";
5930         }
5931         git_print_page_path($file_name, "blob", $hash_base);
5932         print "<div class=\"page_body\">\n";
5933         if ($mimetype =~ m!^image/!) {
5934                 print qq!<img type="!.esc_attr($mimetype).qq!"!;
5935                 if ($file_name) {
5936                         print qq! alt="!.esc_attr($file_name).qq!" title="!.esc_attr($file_name).qq!"!;
5937                 }
5938                 print qq! src="! .
5939                       href(action=>"blob_plain", hash=>$hash,
5940                            hash_base=>$hash_base, file_name=>$file_name) .
5941                       qq!" />\n!;
5942         } else {
5943                 my $nr;
5944                 while (my $line = <$fd>) {
5945                         chomp $line;
5946                         $nr++;
5947                         $line = untabify($line);
5948                         printf qq!<div class="pre"><a id="l%i" href="%s#l%i" class="linenr">%4i</a> %s</div>\n!,
5949                                $nr, esc_attr(href(-replay => 1)), $nr, $nr, $syntax ? $line : esc_html($line, -nbsp=>1);
5950                 }
5951         }
5952         close $fd
5953                 or print "Reading blob failed.\n";
5954         print "</div>";
5955         git_footer_html();
5956 }
5957
5958 sub git_tree {
5959         if (!defined $hash_base) {
5960                 $hash_base = "HEAD";
5961         }
5962         if (!defined $hash) {
5963                 if (defined $file_name) {
5964                         $hash = git_get_hash_by_path($hash_base, $file_name, "tree");
5965                 } else {
5966                         $hash = $hash_base;
5967                 }
5968         }
5969         die_error(404, "No such tree") unless defined($hash);
5970
5971         my $show_sizes = gitweb_check_feature('show-sizes');
5972         my $have_blame = gitweb_check_feature('blame');
5973
5974         my @entries = ();
5975         {
5976                 local $/ = "\0";
5977                 open my $fd, "-|", git_cmd(), "ls-tree", '-z',
5978                         ($show_sizes ? '-l' : ()), @extra_options, $hash
5979                         or die_error(500, "Open git-ls-tree failed");
5980                 @entries = map { chomp; $_ } <$fd>;
5981                 close $fd
5982                         or die_error(404, "Reading tree failed");
5983         }
5984
5985         my $refs = git_get_references();
5986         my $ref = format_ref_marker($refs, $hash_base);
5987         git_header_html();
5988         my $basedir = '';
5989         if (defined $hash_base && (my %co = parse_commit($hash_base))) {
5990                 my @views_nav = ();
5991                 if (defined $file_name) {
5992                         push @views_nav,
5993                                 $cgi->a({-href => href(action=>"history", -replay=>1)},
5994                                         "history"),
5995                                 $cgi->a({-href => href(action=>"tree",
5996                                                        hash_base=>"HEAD", file_name=>$file_name)},
5997                                         "HEAD"),
5998                 }
5999                 my $snapshot_links = format_snapshot_links($hash);
6000                 if (defined $snapshot_links) {
6001                         # FIXME: Should be available when we have no hash base as well.
6002                         push @views_nav, $snapshot_links;
6003                 }
6004                 git_print_page_nav('tree','', $hash_base, undef, undef,
6005                                    join(' | ', @views_nav));
6006                 git_print_header_div('commit', esc_html($co{'title'}) . $ref, $hash_base);
6007         } else {
6008                 undef $hash_base;
6009                 print "<div class=\"page_nav\">\n";
6010                 print "<br/><br/></div>\n";
6011                 print "<div class=\"title\">".esc_html($hash)."</div>\n";
6012         }
6013         if (defined $file_name) {
6014                 $basedir = $file_name;
6015                 if ($basedir ne '' && substr($basedir, -1) ne '/') {
6016                         $basedir .= '/';
6017                 }
6018                 git_print_page_path($file_name, 'tree', $hash_base);
6019         }
6020         print "<div class=\"page_body\">\n";
6021         print "<table class=\"tree\">\n";
6022         my $alternate = 1;
6023         # '..' (top directory) link if possible
6024         if (defined $hash_base &&
6025             defined $file_name && $file_name =~ m![^/]+$!) {
6026                 if ($alternate) {
6027                         print "<tr class=\"dark\">\n";
6028                 } else {
6029                         print "<tr class=\"light\">\n";
6030                 }
6031                 $alternate ^= 1;
6032
6033                 my $up = $file_name;
6034                 $up =~ s!/?[^/]+$!!;
6035                 undef $up unless $up;
6036                 # based on git_print_tree_entry
6037                 print '<td class="mode">' . mode_str('040000') . "</td>\n";
6038                 print '<td class="size">&nbsp;</td>'."\n" if $show_sizes;
6039                 print '<td class="list">';
6040                 print $cgi->a({-href => href(action=>"tree",
6041                                              hash_base=>$hash_base,
6042                                              file_name=>$up)},
6043                               "..");
6044                 print "</td>\n";
6045                 print "<td class=\"link\"></td>\n";
6046
6047                 print "</tr>\n";
6048         }
6049         foreach my $line (@entries) {
6050                 my %t = parse_ls_tree_line($line, -z => 1, -l => $show_sizes);
6051
6052                 if ($alternate) {
6053                         print "<tr class=\"dark\">\n";
6054                 } else {
6055                         print "<tr class=\"light\">\n";
6056                 }
6057                 $alternate ^= 1;
6058
6059                 git_print_tree_entry(\%t, $basedir, $hash_base, $have_blame);
6060
6061                 print "</tr>\n";
6062         }
6063         print "</table>\n" .
6064               "</div>";
6065         git_footer_html();
6066 }
6067
6068 sub snapshot_name {
6069         my ($project, $hash) = @_;
6070
6071         # path/to/project.git  -> project
6072         # path/to/project/.git -> project
6073         my $name = to_utf8($project);
6074         $name =~ s,([^/])/*\.git$,$1,;
6075         $name = basename($name);
6076         # sanitize name
6077         $name =~ s/[[:cntrl:]]/?/g;
6078
6079         my $ver = $hash;
6080         if ($hash =~ /^[0-9a-fA-F]+$/) {
6081                 # shorten SHA-1 hash
6082                 my $full_hash = git_get_full_hash($project, $hash);
6083                 if ($full_hash =~ /^$hash/ && length($hash) > 7) {
6084                         $ver = git_get_short_hash($project, $hash);
6085                 }
6086         } elsif ($hash =~ m!^refs/tags/(.*)$!) {
6087                 # tags don't need shortened SHA-1 hash
6088                 $ver = $1;
6089         } else {
6090                 # branches and other need shortened SHA-1 hash
6091                 if ($hash =~ m!^refs/(?:heads|remotes)/(.*)$!) {
6092                         $ver = $1;
6093                 }
6094                 $ver .= '-' . git_get_short_hash($project, $hash);
6095         }
6096         # in case of hierarchical branch names
6097         $ver =~ s!/!.!g;
6098
6099         # name = project-version_string
6100         $name = "$name-$ver";
6101
6102         return wantarray ? ($name, $name) : $name;
6103 }
6104
6105 sub git_snapshot {
6106         my $format = $input_params{'snapshot_format'};
6107         if (!@snapshot_fmts) {
6108                 die_error(403, "Snapshots not allowed");
6109         }
6110         # default to first supported snapshot format
6111         $format ||= $snapshot_fmts[0];
6112         if ($format !~ m/^[a-z0-9]+$/) {
6113                 die_error(400, "Invalid snapshot format parameter");
6114         } elsif (!exists($known_snapshot_formats{$format})) {
6115                 die_error(400, "Unknown snapshot format");
6116         } elsif ($known_snapshot_formats{$format}{'disabled'}) {
6117                 die_error(403, "Snapshot format not allowed");
6118         } elsif (!grep($_ eq $format, @snapshot_fmts)) {
6119                 die_error(403, "Unsupported snapshot format");
6120         }
6121
6122         my $type = git_get_type("$hash^{}");
6123         if (!$type) {
6124                 die_error(404, 'Object does not exist');
6125         }  elsif ($type eq 'blob') {
6126                 die_error(400, 'Object is not a tree-ish');
6127         }
6128
6129         my ($name, $prefix) = snapshot_name($project, $hash);
6130         my $filename = "$name$known_snapshot_formats{$format}{'suffix'}";
6131         my $cmd = quote_command(
6132                 git_cmd(), 'archive',
6133                 "--format=$known_snapshot_formats{$format}{'format'}",
6134                 "--prefix=$prefix/", $hash);
6135         if (exists $known_snapshot_formats{$format}{'compressor'}) {
6136                 $cmd .= ' | ' . quote_command(@{$known_snapshot_formats{$format}{'compressor'}});
6137         }
6138
6139         $filename =~ s/(["\\])/\\$1/g;
6140         print $cgi->header(
6141                 -type => $known_snapshot_formats{$format}{'type'},
6142                 -content_disposition => 'inline; filename="' . $filename . '"',
6143                 -status => '200 OK');
6144
6145         open my $fd, "-|", $cmd
6146                 or die_error(500, "Execute git-archive failed");
6147         binmode STDOUT, ':raw';
6148         print <$fd>;
6149         binmode STDOUT, ':utf8'; # as set at the beginning of gitweb.cgi
6150         close $fd;
6151 }
6152
6153 sub git_log_generic {
6154         my ($fmt_name, $body_subr, $base, $parent, $file_name, $file_hash) = @_;
6155
6156         my $head = git_get_head_hash($project);
6157         if (!defined $base) {
6158                 $base = $head;
6159         }
6160         if (!defined $page) {
6161                 $page = 0;
6162         }
6163         my $refs = git_get_references();
6164
6165         my $commit_hash = $base;
6166         if (defined $parent) {
6167                 $commit_hash = "$parent..$base";
6168         }
6169         my @commitlist =
6170                 parse_commits($commit_hash, 101, (100 * $page),
6171                               defined $file_name ? ($file_name, "--full-history") : ());
6172
6173         my $ftype;
6174         if (!defined $file_hash && defined $file_name) {
6175                 # some commits could have deleted file in question,
6176                 # and not have it in tree, but one of them has to have it
6177                 for (my $i = 0; $i < @commitlist; $i++) {
6178                         $file_hash = git_get_hash_by_path($commitlist[$i]{'id'}, $file_name);
6179                         last if defined $file_hash;
6180                 }
6181         }
6182         if (defined $file_hash) {
6183                 $ftype = git_get_type($file_hash);
6184         }
6185         if (defined $file_name && !defined $ftype) {
6186                 die_error(500, "Unknown type of object");
6187         }
6188         my %co;
6189         if (defined $file_name) {
6190                 %co = parse_commit($base)
6191                         or die_error(404, "Unknown commit object");
6192         }
6193
6194
6195         my $paging_nav = format_paging_nav($fmt_name, $page, $#commitlist >= 100);
6196         my $next_link = '';
6197         if ($#commitlist >= 100) {
6198                 $next_link =
6199                         $cgi->a({-href => href(-replay=>1, page=>$page+1),
6200                                  -accesskey => "n", -title => "Alt-n"}, "next");
6201         }
6202         my $patch_max = gitweb_get_feature('patches');
6203         if ($patch_max && !defined $file_name) {
6204                 if ($patch_max < 0 || @commitlist <= $patch_max) {
6205                         $paging_nav .= " &sdot; " .
6206                                 $cgi->a({-href => href(action=>"patches", -replay=>1)},
6207                                         "patches");
6208                 }
6209         }
6210
6211         git_header_html();
6212         git_print_page_nav($fmt_name,'', $hash,$hash,$hash, $paging_nav);
6213         if (defined $file_name) {
6214                 git_print_header_div('commit', esc_html($co{'title'}), $base);
6215         } else {
6216                 git_print_header_div('summary', $project)
6217         }
6218         git_print_page_path($file_name, $ftype, $hash_base)
6219                 if (defined $file_name);
6220
6221         $body_subr->(\@commitlist, 0, 99, $refs, $next_link,
6222                      $file_name, $file_hash, $ftype);
6223
6224         git_footer_html();
6225 }
6226
6227 sub git_log {
6228         git_log_generic('log', \&git_log_body,
6229                         $hash, $hash_parent);
6230 }
6231
6232 sub git_commit {
6233         $hash ||= $hash_base || "HEAD";
6234         my %co = parse_commit($hash)
6235             or die_error(404, "Unknown commit object");
6236
6237         my $parent  = $co{'parent'};
6238         my $parents = $co{'parents'}; # listref
6239
6240         # we need to prepare $formats_nav before any parameter munging
6241         my $formats_nav;
6242         if (!defined $parent) {
6243                 # --root commitdiff
6244                 $formats_nav .= '(initial)';
6245         } elsif (@$parents == 1) {
6246                 # single parent commit
6247                 $formats_nav .=
6248                         '(parent: ' .
6249                         $cgi->a({-href => href(action=>"commit",
6250                                                hash=>$parent)},
6251                                 esc_html(substr($parent, 0, 7))) .
6252                         ')';
6253         } else {
6254                 # merge commit
6255                 $formats_nav .=
6256                         '(merge: ' .
6257                         join(' ', map {
6258                                 $cgi->a({-href => href(action=>"commit",
6259                                                        hash=>$_)},
6260                                         esc_html(substr($_, 0, 7)));
6261                         } @$parents ) .
6262                         ')';
6263         }
6264         if (gitweb_check_feature('patches') && @$parents <= 1) {
6265                 $formats_nav .= " | " .
6266                         $cgi->a({-href => href(action=>"patch", -replay=>1)},
6267                                 "patch");
6268         }
6269
6270         if (!defined $parent) {
6271                 $parent = "--root";
6272         }
6273         my @difftree;
6274         open my $fd, "-|", git_cmd(), "diff-tree", '-r', "--no-commit-id",
6275                 @diff_opts,
6276                 (@$parents <= 1 ? $parent : '-c'),
6277                 $hash, "--"
6278                 or die_error(500, "Open git-diff-tree failed");
6279         @difftree = map { chomp; $_ } <$fd>;
6280         close $fd or die_error(404, "Reading git-diff-tree failed");
6281
6282         # non-textual hash id's can be cached
6283         my $expires;
6284         if ($hash =~ m/^[0-9a-fA-F]{40}$/) {
6285                 $expires = "+1d";
6286         }
6287         my $refs = git_get_references();
6288         my $ref = format_ref_marker($refs, $co{'id'});
6289
6290         git_header_html(undef, $expires);
6291         git_print_page_nav('commit', '',
6292                            $hash, $co{'tree'}, $hash,
6293                            $formats_nav);
6294
6295         if (defined $co{'parent'}) {
6296                 git_print_header_div('commitdiff', esc_html($co{'title'}) . $ref, $hash);
6297         } else {
6298                 git_print_header_div('tree', esc_html($co{'title'}) . $ref, $co{'tree'}, $hash);
6299         }
6300         print "<div class=\"title_text\">\n" .
6301               "<table class=\"object_header\">\n";
6302         git_print_authorship_rows(\%co);
6303         print "<tr><td>commit</td><td class=\"sha1\">$co{'id'}</td></tr>\n";
6304         print "<tr>" .
6305               "<td>tree</td>" .
6306               "<td class=\"sha1\">" .
6307               $cgi->a({-href => href(action=>"tree", hash=>$co{'tree'}, hash_base=>$hash),
6308                        class => "list"}, $co{'tree'}) .
6309               "</td>" .
6310               "<td class=\"link\">" .
6311               $cgi->a({-href => href(action=>"tree", hash=>$co{'tree'}, hash_base=>$hash)},
6312                       "tree");
6313         my $snapshot_links = format_snapshot_links($hash);
6314         if (defined $snapshot_links) {
6315                 print " | " . $snapshot_links;
6316         }
6317         print "</td>" .
6318               "</tr>\n";
6319
6320         foreach my $par (@$parents) {
6321                 print "<tr>" .
6322                       "<td>parent</td>" .
6323                       "<td class=\"sha1\">" .
6324                       $cgi->a({-href => href(action=>"commit", hash=>$par),
6325                                class => "list"}, $par) .
6326                       "</td>" .
6327                       "<td class=\"link\">" .
6328                       $cgi->a({-href => href(action=>"commit", hash=>$par)}, "commit") .
6329                       " | " .
6330                       $cgi->a({-href => href(action=>"commitdiff", hash=>$hash, hash_parent=>$par)}, "diff") .
6331                       "</td>" .
6332                       "</tr>\n";
6333         }
6334         print "</table>".
6335               "</div>\n";
6336
6337         print "<div class=\"page_body\">\n";
6338         git_print_log($co{'comment'});
6339         print "</div>\n";
6340
6341         git_difftree_body(\@difftree, $hash, @$parents);
6342
6343         git_footer_html();
6344 }
6345
6346 sub git_object {
6347         # object is defined by:
6348         # - hash or hash_base alone
6349         # - hash_base and file_name
6350         my $type;
6351
6352         # - hash or hash_base alone
6353         if ($hash || ($hash_base && !defined $file_name)) {
6354                 my $object_id = $hash || $hash_base;
6355
6356                 open my $fd, "-|", quote_command(
6357                         git_cmd(), 'cat-file', '-t', $object_id) . ' 2> /dev/null'
6358                         or die_error(404, "Object does not exist");
6359                 $type = <$fd>;
6360                 chomp $type;
6361                 close $fd
6362                         or die_error(404, "Object does not exist");
6363
6364         # - hash_base and file_name
6365         } elsif ($hash_base && defined $file_name) {
6366                 $file_name =~ s,/+$,,;
6367
6368                 system(git_cmd(), "cat-file", '-e', $hash_base) == 0
6369                         or die_error(404, "Base object does not exist");
6370
6371                 # here errors should not hapen
6372                 open my $fd, "-|", git_cmd(), "ls-tree", $hash_base, "--", $file_name
6373                         or die_error(500, "Open git-ls-tree failed");
6374                 my $line = <$fd>;
6375                 close $fd;
6376
6377                 #'100644 blob 0fa3f3a66fb6a137f6ec2c19351ed4d807070ffa  panic.c'
6378                 unless ($line && $line =~ m/^([0-9]+) (.+) ([0-9a-fA-F]{40})\t/) {
6379                         die_error(404, "File or directory for given base does not exist");
6380                 }
6381                 $type = $2;
6382                 $hash = $3;
6383         } else {
6384                 die_error(400, "Not enough information to find object");
6385         }
6386
6387         print $cgi->redirect(-uri => href(action=>$type, -full=>1,
6388                                           hash=>$hash, hash_base=>$hash_base,
6389                                           file_name=>$file_name),
6390                              -status => '302 Found');
6391 }
6392
6393 sub git_blobdiff {
6394         my $format = shift || 'html';
6395
6396         my $fd;
6397         my @difftree;
6398         my %diffinfo;
6399         my $expires;
6400
6401         # preparing $fd and %diffinfo for git_patchset_body
6402         # new style URI
6403         if (defined $hash_base && defined $hash_parent_base) {
6404                 if (defined $file_name) {
6405                         # read raw output
6406                         open $fd, "-|", git_cmd(), "diff-tree", '-r', @diff_opts,
6407                                 $hash_parent_base, $hash_base,
6408                                 "--", (defined $file_parent ? $file_parent : ()), $file_name
6409                                 or die_error(500, "Open git-diff-tree failed");
6410                         @difftree = map { chomp; $_ } <$fd>;
6411                         close $fd
6412                                 or die_error(404, "Reading git-diff-tree failed");
6413                         @difftree
6414                                 or die_error(404, "Blob diff not found");
6415
6416                 } elsif (defined $hash &&
6417                          $hash =~ /[0-9a-fA-F]{40}/) {
6418                         # try to find filename from $hash
6419
6420                         # read filtered raw output
6421                         open $fd, "-|", git_cmd(), "diff-tree", '-r', @diff_opts,
6422                                 $hash_parent_base, $hash_base, "--"
6423                                 or die_error(500, "Open git-diff-tree failed");
6424                         @difftree =
6425                                 # ':100644 100644 03b21826... 3b93d5e7... M     ls-files.c'
6426                                 # $hash == to_id
6427                                 grep { /^:[0-7]{6} [0-7]{6} [0-9a-fA-F]{40} $hash/ }
6428                                 map { chomp; $_ } <$fd>;
6429                         close $fd
6430                                 or die_error(404, "Reading git-diff-tree failed");
6431                         @difftree
6432                                 or die_error(404, "Blob diff not found");
6433
6434                 } else {
6435                         die_error(400, "Missing one of the blob diff parameters");
6436                 }
6437
6438                 if (@difftree > 1) {
6439                         die_error(400, "Ambiguous blob diff specification");
6440                 }
6441
6442                 %diffinfo = parse_difftree_raw_line($difftree[0]);
6443                 $file_parent ||= $diffinfo{'from_file'} || $file_name;
6444                 $file_name   ||= $diffinfo{'to_file'};
6445
6446                 $hash_parent ||= $diffinfo{'from_id'};
6447                 $hash        ||= $diffinfo{'to_id'};
6448
6449                 # non-textual hash id's can be cached
6450                 if ($hash_base =~ m/^[0-9a-fA-F]{40}$/ &&
6451                     $hash_parent_base =~ m/^[0-9a-fA-F]{40}$/) {
6452                         $expires = '+1d';
6453                 }
6454
6455                 # open patch output
6456                 open $fd, "-|", git_cmd(), "diff-tree", '-r', @diff_opts,
6457                         '-p', ($format eq 'html' ? "--full-index" : ()),
6458                         $hash_parent_base, $hash_base,
6459                         "--", (defined $file_parent ? $file_parent : ()), $file_name
6460                         or die_error(500, "Open git-diff-tree failed");
6461         }
6462
6463         # old/legacy style URI -- not generated anymore since 1.4.3.
6464         if (!%diffinfo) {
6465                 die_error('404 Not Found', "Missing one of the blob diff parameters")
6466         }
6467
6468         # header
6469         if ($format eq 'html') {
6470                 my $formats_nav =
6471                         $cgi->a({-href => href(action=>"blobdiff_plain", -replay=>1)},
6472                                 "raw");
6473                 git_header_html(undef, $expires);
6474                 if (defined $hash_base && (my %co = parse_commit($hash_base))) {
6475                         git_print_page_nav('','', $hash_base,$co{'tree'},$hash_base, $formats_nav);
6476                         git_print_header_div('commit', esc_html($co{'title'}), $hash_base);
6477                 } else {
6478                         print "<div class=\"page_nav\"><br/>$formats_nav<br/></div>\n";
6479                         print "<div class=\"title\">".esc_html("$hash vs $hash_parent")."</div>\n";
6480                 }
6481                 if (defined $file_name) {
6482                         git_print_page_path($file_name, "blob", $hash_base);
6483                 } else {
6484                         print "<div class=\"page_path\"></div>\n";
6485                 }
6486
6487         } elsif ($format eq 'plain') {
6488                 print $cgi->header(
6489                         -type => 'text/plain',
6490                         -charset => 'utf-8',
6491                         -expires => $expires,
6492                         -content_disposition => 'inline; filename="' . "$file_name" . '.patch"');
6493
6494                 print "X-Git-Url: " . $cgi->self_url() . "\n\n";
6495
6496         } else {
6497                 die_error(400, "Unknown blobdiff format");
6498         }
6499
6500         # patch
6501         if ($format eq 'html') {
6502                 print "<div class=\"page_body\">\n";
6503
6504                 git_patchset_body($fd, [ \%diffinfo ], $hash_base, $hash_parent_base);
6505                 close $fd;
6506
6507                 print "</div>\n"; # class="page_body"
6508                 git_footer_html();
6509
6510         } else {
6511                 while (my $line = <$fd>) {
6512                         $line =~ s!a/($hash|$hash_parent)!'a/'.esc_path($diffinfo{'from_file'})!eg;
6513                         $line =~ s!b/($hash|$hash_parent)!'b/'.esc_path($diffinfo{'to_file'})!eg;
6514
6515                         print $line;
6516
6517                         last if $line =~ m!^\+\+\+!;
6518                 }
6519                 local $/ = undef;
6520                 print <$fd>;
6521                 close $fd;
6522         }
6523 }
6524
6525 sub git_blobdiff_plain {
6526         git_blobdiff('plain');
6527 }
6528
6529 sub git_commitdiff {
6530         my %params = @_;
6531         my $format = $params{-format} || 'html';
6532
6533         my ($patch_max) = gitweb_get_feature('patches');
6534         if ($format eq 'patch') {
6535                 die_error(403, "Patch view not allowed") unless $patch_max;
6536         }
6537
6538         $hash ||= $hash_base || "HEAD";
6539         my %co = parse_commit($hash)
6540             or die_error(404, "Unknown commit object");
6541
6542         # choose format for commitdiff for merge
6543         if (! defined $hash_parent && @{$co{'parents'}} > 1) {
6544                 $hash_parent = '--cc';
6545         }
6546         # we need to prepare $formats_nav before almost any parameter munging
6547         my $formats_nav;
6548         if ($format eq 'html') {
6549                 $formats_nav =
6550                         $cgi->a({-href => href(action=>"commitdiff_plain", -replay=>1)},
6551                                 "raw");
6552                 if ($patch_max && @{$co{'parents'}} <= 1) {
6553                         $formats_nav .= " | " .
6554                                 $cgi->a({-href => href(action=>"patch", -replay=>1)},
6555                                         "patch");
6556                 }
6557
6558                 if (defined $hash_parent &&
6559                     $hash_parent ne '-c' && $hash_parent ne '--cc') {
6560                         # commitdiff with two commits given
6561                         my $hash_parent_short = $hash_parent;
6562                         if ($hash_parent =~ m/^[0-9a-fA-F]{40}$/) {
6563                                 $hash_parent_short = substr($hash_parent, 0, 7);
6564                         }
6565                         $formats_nav .=
6566                                 ' (from';
6567                         for (my $i = 0; $i < @{$co{'parents'}}; $i++) {
6568                                 if ($co{'parents'}[$i] eq $hash_parent) {
6569                                         $formats_nav .= ' parent ' . ($i+1);
6570                                         last;
6571                                 }
6572                         }
6573                         $formats_nav .= ': ' .
6574                                 $cgi->a({-href => href(action=>"commitdiff",
6575                                                        hash=>$hash_parent)},
6576                                         esc_html($hash_parent_short)) .
6577                                 ')';
6578                 } elsif (!$co{'parent'}) {
6579                         # --root commitdiff
6580                         $formats_nav .= ' (initial)';
6581                 } elsif (scalar @{$co{'parents'}} == 1) {
6582                         # single parent commit
6583                         $formats_nav .=
6584                                 ' (parent: ' .
6585                                 $cgi->a({-href => href(action=>"commitdiff",
6586                                                        hash=>$co{'parent'})},
6587                                         esc_html(substr($co{'parent'}, 0, 7))) .
6588                                 ')';
6589                 } else {
6590                         # merge commit
6591                         if ($hash_parent eq '--cc') {
6592                                 $formats_nav .= ' | ' .
6593                                         $cgi->a({-href => href(action=>"commitdiff",
6594                                                                hash=>$hash, hash_parent=>'-c')},
6595                                                 'combined');
6596                         } else { # $hash_parent eq '-c'
6597                                 $formats_nav .= ' | ' .
6598                                         $cgi->a({-href => href(action=>"commitdiff",
6599                                                                hash=>$hash, hash_parent=>'--cc')},
6600                                                 'compact');
6601                         }
6602                         $formats_nav .=
6603                                 ' (merge: ' .
6604                                 join(' ', map {
6605                                         $cgi->a({-href => href(action=>"commitdiff",
6606                                                                hash=>$_)},
6607                                                 esc_html(substr($_, 0, 7)));
6608                                 } @{$co{'parents'}} ) .
6609                                 ')';
6610                 }
6611         }
6612
6613         my $hash_parent_param = $hash_parent;
6614         if (!defined $hash_parent_param) {
6615                 # --cc for multiple parents, --root for parentless
6616                 $hash_parent_param =
6617                         @{$co{'parents'}} > 1 ? '--cc' : $co{'parent'} || '--root';
6618         }
6619
6620         # read commitdiff
6621         my $fd;
6622         my @difftree;
6623         if ($format eq 'html') {
6624                 open $fd, "-|", git_cmd(), "diff-tree", '-r', @diff_opts,
6625                         "--no-commit-id", "--patch-with-raw", "--full-index",
6626                         $hash_parent_param, $hash, "--"
6627                         or die_error(500, "Open git-diff-tree failed");
6628
6629                 while (my $line = <$fd>) {
6630                         chomp $line;
6631                         # empty line ends raw part of diff-tree output
6632                         last unless $line;
6633                         push @difftree, scalar parse_difftree_raw_line($line);
6634                 }
6635
6636         } elsif ($format eq 'plain') {
6637                 open $fd, "-|", git_cmd(), "diff-tree", '-r', @diff_opts,
6638                         '-p', $hash_parent_param, $hash, "--"
6639                         or die_error(500, "Open git-diff-tree failed");
6640         } elsif ($format eq 'patch') {
6641                 # For commit ranges, we limit the output to the number of
6642                 # patches specified in the 'patches' feature.
6643                 # For single commits, we limit the output to a single patch,
6644                 # diverging from the git-format-patch default.
6645                 my @commit_spec = ();
6646                 if ($hash_parent) {
6647                         if ($patch_max > 0) {
6648                                 push @commit_spec, "-$patch_max";
6649                         }
6650                         push @commit_spec, '-n', "$hash_parent..$hash";
6651                 } else {
6652                         if ($params{-single}) {
6653                                 push @commit_spec, '-1';
6654                         } else {
6655                                 if ($patch_max > 0) {
6656                                         push @commit_spec, "-$patch_max";
6657                                 }
6658                                 push @commit_spec, "-n";
6659                         }
6660                         push @commit_spec, '--root', $hash;
6661                 }
6662                 open $fd, "-|", git_cmd(), "format-patch", @diff_opts,
6663                         '--encoding=utf8', '--stdout', @commit_spec
6664                         or die_error(500, "Open git-format-patch failed");
6665         } else {
6666                 die_error(400, "Unknown commitdiff format");
6667         }
6668
6669         # non-textual hash id's can be cached
6670         my $expires;
6671         if ($hash =~ m/^[0-9a-fA-F]{40}$/) {
6672                 $expires = "+1d";
6673         }
6674
6675         # write commit message
6676         if ($format eq 'html') {
6677                 my $refs = git_get_references();
6678                 my $ref = format_ref_marker($refs, $co{'id'});
6679
6680                 git_header_html(undef, $expires);
6681                 git_print_page_nav('commitdiff','', $hash,$co{'tree'},$hash, $formats_nav);
6682                 git_print_header_div('commit', esc_html($co{'title'}) . $ref, $hash);
6683                 print "<div class=\"title_text\">\n" .
6684                       "<table class=\"object_header\">\n";
6685                 git_print_authorship_rows(\%co);
6686                 print "</table>".
6687                       "</div>\n";
6688                 print "<div class=\"page_body\">\n";
6689                 if (@{$co{'comment'}} > 1) {
6690                         print "<div class=\"log\">\n";
6691                         git_print_log($co{'comment'}, -final_empty_line=> 1, -remove_title => 1);
6692                         print "</div>\n"; # class="log"
6693                 }
6694
6695         } elsif ($format eq 'plain') {
6696                 my $refs = git_get_references("tags");
6697                 my $tagname = git_get_rev_name_tags($hash);
6698                 my $filename = basename($project) . "-$hash.patch";
6699
6700                 print $cgi->header(
6701                         -type => 'text/plain',
6702                         -charset => 'utf-8',
6703                         -expires => $expires,
6704                         -content_disposition => 'inline; filename="' . "$filename" . '"');
6705                 my %ad = parse_date($co{'author_epoch'}, $co{'author_tz'});
6706                 print "From: " . to_utf8($co{'author'}) . "\n";
6707                 print "Date: $ad{'rfc2822'} ($ad{'tz_local'})\n";
6708                 print "Subject: " . to_utf8($co{'title'}) . "\n";
6709
6710                 print "X-Git-Tag: $tagname\n" if $tagname;
6711                 print "X-Git-Url: " . $cgi->self_url() . "\n\n";
6712
6713                 foreach my $line (@{$co{'comment'}}) {
6714                         print to_utf8($line) . "\n";
6715                 }
6716                 print "---\n\n";
6717         } elsif ($format eq 'patch') {
6718                 my $filename = basename($project) . "-$hash.patch";
6719
6720                 print $cgi->header(
6721                         -type => 'text/plain',
6722                         -charset => 'utf-8',
6723                         -expires => $expires,
6724                         -content_disposition => 'inline; filename="' . "$filename" . '"');
6725         }
6726
6727         # write patch
6728         if ($format eq 'html') {
6729                 my $use_parents = !defined $hash_parent ||
6730                         $hash_parent eq '-c' || $hash_parent eq '--cc';
6731                 git_difftree_body(\@difftree, $hash,
6732                                   $use_parents ? @{$co{'parents'}} : $hash_parent);
6733                 print "<br/>\n";
6734
6735                 git_patchset_body($fd, \@difftree, $hash,
6736                                   $use_parents ? @{$co{'parents'}} : $hash_parent);
6737                 close $fd;
6738                 print "</div>\n"; # class="page_body"
6739                 git_footer_html();
6740
6741         } elsif ($format eq 'plain') {
6742                 local $/ = undef;
6743                 print <$fd>;
6744                 close $fd
6745                         or print "Reading git-diff-tree failed\n";
6746         } elsif ($format eq 'patch') {
6747                 local $/ = undef;
6748                 print <$fd>;
6749                 close $fd
6750                         or print "Reading git-format-patch failed\n";
6751         }
6752 }
6753
6754 sub git_commitdiff_plain {
6755         git_commitdiff(-format => 'plain');
6756 }
6757
6758 # format-patch-style patches
6759 sub git_patch {
6760         git_commitdiff(-format => 'patch', -single => 1);
6761 }
6762
6763 sub git_patches {
6764         git_commitdiff(-format => 'patch');
6765 }
6766
6767 sub git_history {
6768         git_log_generic('history', \&git_history_body,
6769                         $hash_base, $hash_parent_base,
6770                         $file_name, $hash);
6771 }
6772
6773 sub git_search {
6774         gitweb_check_feature('search') or die_error(403, "Search is disabled");
6775         if (!defined $searchtext) {
6776                 die_error(400, "Text field is empty");
6777         }
6778         if (!defined $hash) {
6779                 $hash = git_get_head_hash($project);
6780         }
6781         my %co = parse_commit($hash);
6782         if (!%co) {
6783                 die_error(404, "Unknown commit object");
6784         }
6785         if (!defined $page) {
6786                 $page = 0;
6787         }
6788
6789         $searchtype ||= 'commit';
6790         if ($searchtype eq 'pickaxe') {
6791                 # pickaxe may take all resources of your box and run for several minutes
6792                 # with every query - so decide by yourself how public you make this feature
6793                 gitweb_check_feature('pickaxe')
6794                     or die_error(403, "Pickaxe is disabled");
6795         }
6796         if ($searchtype eq 'grep') {
6797                 gitweb_check_feature('grep')
6798                     or die_error(403, "Grep is disabled");
6799         }
6800
6801         git_header_html();
6802
6803         if ($searchtype eq 'commit' or $searchtype eq 'author' or $searchtype eq 'committer') {
6804                 my $greptype;
6805                 if ($searchtype eq 'commit') {
6806                         $greptype = "--grep=";
6807                 } elsif ($searchtype eq 'author') {
6808                         $greptype = "--author=";
6809                 } elsif ($searchtype eq 'committer') {
6810                         $greptype = "--committer=";
6811                 }
6812                 $greptype .= $searchtext;
6813                 my @commitlist = parse_commits($hash, 101, (100 * $page), undef,
6814                                                $greptype, '--regexp-ignore-case',
6815                                                $search_use_regexp ? '--extended-regexp' : '--fixed-strings');
6816
6817                 my $paging_nav = '';
6818                 if ($page > 0) {
6819                         $paging_nav .=
6820                                 $cgi->a({-href => href(action=>"search", hash=>$hash,
6821                                                        searchtext=>$searchtext,
6822                                                        searchtype=>$searchtype)},
6823                                         "first");
6824                         $paging_nav .= " &sdot; " .
6825                                 $cgi->a({-href => href(-replay=>1, page=>$page-1),
6826                                          -accesskey => "p", -title => "Alt-p"}, "prev");
6827                 } else {
6828                         $paging_nav .= "first";
6829                         $paging_nav .= " &sdot; prev";
6830                 }
6831                 my $next_link = '';
6832                 if ($#commitlist >= 100) {
6833                         $next_link =
6834                                 $cgi->a({-href => href(-replay=>1, page=>$page+1),
6835                                          -accesskey => "n", -title => "Alt-n"}, "next");
6836                         $paging_nav .= " &sdot; $next_link";
6837                 } else {
6838                         $paging_nav .= " &sdot; next";
6839                 }
6840
6841                 git_print_page_nav('','', $hash,$co{'tree'},$hash, $paging_nav);
6842                 git_print_header_div('commit', esc_html($co{'title'}), $hash);
6843                 if ($page == 0 && !@commitlist) {
6844                         print "<p>No match.</p>\n";
6845                 } else {
6846                         git_search_grep_body(\@commitlist, 0, 99, $next_link);
6847                 }
6848         }
6849
6850         if ($searchtype eq 'pickaxe') {
6851                 git_print_page_nav('','', $hash,$co{'tree'},$hash);
6852                 git_print_header_div('commit', esc_html($co{'title'}), $hash);
6853
6854                 print "<table class=\"pickaxe search\">\n";
6855                 my $alternate = 1;
6856                 local $/ = "\n";
6857                 open my $fd, '-|', git_cmd(), '--no-pager', 'log', @diff_opts,
6858                         '--pretty=format:%H', '--no-abbrev', '--raw', "-S$searchtext",
6859                         ($search_use_regexp ? '--pickaxe-regex' : ());
6860                 undef %co;
6861                 my @files;
6862                 while (my $line = <$fd>) {
6863                         chomp $line;
6864                         next unless $line;
6865
6866                         my %set = parse_difftree_raw_line($line);
6867                         if (defined $set{'commit'}) {
6868                                 # finish previous commit
6869                                 if (%co) {
6870                                         print "</td>\n" .
6871                                               "<td class=\"link\">" .
6872                                               $cgi->a({-href => href(action=>"commit", hash=>$co{'id'})}, "commit") .
6873                                               " | " .
6874                                               $cgi->a({-href => href(action=>"tree", hash=>$co{'tree'}, hash_base=>$co{'id'})}, "tree");
6875                                         print "</td>\n" .
6876                                               "</tr>\n";
6877                                 }
6878
6879                                 if ($alternate) {
6880                                         print "<tr class=\"dark\">\n";
6881                                 } else {
6882                                         print "<tr class=\"light\">\n";
6883                                 }
6884                                 $alternate ^= 1;
6885                                 %co = parse_commit($set{'commit'});
6886                                 my $author = chop_and_escape_str($co{'author_name'}, 15, 5);
6887                                 print "<td title=\"$co{'age_string_age'}\"><i>$co{'age_string_date'}</i></td>\n" .
6888                                       "<td><i>$author</i></td>\n" .
6889                                       "<td>" .
6890                                       $cgi->a({-href => href(action=>"commit", hash=>$co{'id'}),
6891                                               -class => "list subject"},
6892                                               chop_and_escape_str($co{'title'}, 50) . "<br/>");
6893                         } elsif (defined $set{'to_id'}) {
6894                                 next if ($set{'to_id'} =~ m/^0{40}$/);
6895
6896                                 print $cgi->a({-href => href(action=>"blob", hash_base=>$co{'id'},
6897                                                              hash=>$set{'to_id'}, file_name=>$set{'to_file'}),
6898                                               -class => "list"},
6899                                               "<span class=\"match\">" . esc_path($set{'file'}) . "</span>") .
6900                                       "<br/>\n";
6901                         }
6902                 }
6903                 close $fd;
6904
6905                 # finish last commit (warning: repetition!)
6906                 if (%co) {
6907                         print "</td>\n" .
6908                               "<td class=\"link\">" .
6909                               $cgi->a({-href => href(action=>"commit", hash=>$co{'id'})}, "commit") .
6910                               " | " .
6911                               $cgi->a({-href => href(action=>"tree", hash=>$co{'tree'}, hash_base=>$co{'id'})}, "tree");
6912                         print "</td>\n" .
6913                               "</tr>\n";
6914                 }
6915
6916                 print "</table>\n";
6917         }
6918
6919         if ($searchtype eq 'grep') {
6920                 git_print_page_nav('','', $hash,$co{'tree'},$hash);
6921                 git_print_header_div('commit', esc_html($co{'title'}), $hash);
6922
6923                 print "<table class=\"grep_search\">\n";
6924                 my $alternate = 1;
6925                 my $matches = 0;
6926                 local $/ = "\n";
6927                 open my $fd, "-|", git_cmd(), 'grep', '-n',
6928                         $search_use_regexp ? ('-E', '-i') : '-F',
6929                         $searchtext, $co{'tree'};
6930                 my $lastfile = '';
6931                 while (my $line = <$fd>) {
6932                         chomp $line;
6933                         my ($file, $lno, $ltext, $binary);
6934                         last if ($matches++ > 1000);
6935                         if ($line =~ /^Binary file (.+) matches$/) {
6936                                 $file = $1;
6937                                 $binary = 1;
6938                         } else {
6939                                 (undef, $file, $lno, $ltext) = split(/:/, $line, 4);
6940                         }
6941                         if ($file ne $lastfile) {
6942                                 $lastfile and print "</td></tr>\n";
6943                                 if ($alternate++) {
6944                                         print "<tr class=\"dark\">\n";
6945                                 } else {
6946                                         print "<tr class=\"light\">\n";
6947                                 }
6948                                 print "<td class=\"list\">".
6949                                         $cgi->a({-href => href(action=>"blob", hash=>$co{'hash'},
6950                                                                file_name=>"$file"),
6951                                                 -class => "list"}, esc_path($file));
6952                                 print "</td><td>\n";
6953                                 $lastfile = $file;
6954                         }
6955                         if ($binary) {
6956                                 print "<div class=\"binary\">Binary file</div>\n";
6957                         } else {
6958                                 $ltext = untabify($ltext);
6959                                 if ($ltext =~ m/^(.*)($search_regexp)(.*)$/i) {
6960                                         $ltext = esc_html($1, -nbsp=>1);
6961                                         $ltext .= '<span class="match">';
6962                                         $ltext .= esc_html($2, -nbsp=>1);
6963                                         $ltext .= '</span>';
6964                                         $ltext .= esc_html($3, -nbsp=>1);
6965                                 } else {
6966                                         $ltext = esc_html($ltext, -nbsp=>1);
6967                                 }
6968                                 print "<div class=\"pre\">" .
6969                                         $cgi->a({-href => href(action=>"blob", hash=>$co{'hash'},
6970                                                                file_name=>"$file").'#l'.$lno,
6971                                                 -class => "linenr"}, sprintf('%4i', $lno))
6972                                         . ' ' .  $ltext . "</div>\n";
6973                         }
6974                 }
6975                 if ($lastfile) {
6976                         print "</td></tr>\n";
6977                         if ($matches > 1000) {
6978                                 print "<div class=\"diff nodifferences\">Too many matches, listing trimmed</div>\n";
6979                         }
6980                 } else {
6981                         print "<div class=\"diff nodifferences\">No matches found</div>\n";
6982                 }
6983                 close $fd;
6984
6985                 print "</table>\n";
6986         }
6987         git_footer_html();
6988 }
6989
6990 sub git_search_help {
6991         git_header_html();
6992         git_print_page_nav('','', $hash,$hash,$hash);
6993         print <<EOT;
6994 <p><strong>Pattern</strong> is by default a normal string that is matched precisely (but without
6995 regard to case, except in the case of pickaxe). However, when you check the <em>re</em> checkbox,
6996 the pattern entered is recognized as the POSIX extended
6997 <a href="http://en.wikipedia.org/wiki/Regular_expression">regular expression</a> (also case
6998 insensitive).</p>
6999 <dl>
7000 <dt><b>commit</b></dt>
7001 <dd>The commit messages and authorship information will be scanned for the given pattern.</dd>
7002 EOT
7003         my $have_grep = gitweb_check_feature('grep');
7004         if ($have_grep) {
7005                 print <<EOT;
7006 <dt><b>grep</b></dt>
7007 <dd>All files in the currently selected tree (HEAD unless you are explicitly browsing
7008     a different one) are searched for the given pattern. On large trees, this search can take
7009 a while and put some strain on the server, so please use it with some consideration. Note that
7010 due to git-grep peculiarity, currently if regexp mode is turned off, the matches are
7011 case-sensitive.</dd>
7012 EOT
7013         }
7014         print <<EOT;
7015 <dt><b>author</b></dt>
7016 <dd>Name and e-mail of the change author and date of birth of the patch will be scanned for the given pattern.</dd>
7017 <dt><b>committer</b></dt>
7018 <dd>Name and e-mail of the committer and date of commit will be scanned for the given pattern.</dd>
7019 EOT
7020         my $have_pickaxe = gitweb_check_feature('pickaxe');
7021         if ($have_pickaxe) {
7022                 print <<EOT;
7023 <dt><b>pickaxe</b></dt>
7024 <dd>All commits that caused the string to appear or disappear from any file (changes that
7025 added, removed or "modified" the string) will be listed. This search can take a while and
7026 takes a lot of strain on the server, so please use it wisely. Note that since you may be
7027 interested even in changes just changing the case as well, this search is case sensitive.</dd>
7028 EOT
7029         }
7030         print "</dl>\n";
7031         git_footer_html();
7032 }
7033
7034 sub git_shortlog {
7035         git_log_generic('shortlog', \&git_shortlog_body,
7036                         $hash, $hash_parent);
7037 }
7038
7039 ## ......................................................................
7040 ## feeds (RSS, Atom; OPML)
7041
7042 sub git_feed {
7043         my $format = shift || 'atom';
7044         my $have_blame = gitweb_check_feature('blame');
7045
7046         # Atom: http://www.atomenabled.org/developers/syndication/
7047         # RSS:  http://www.notestips.com/80256B3A007F2692/1/NAMO5P9UPQ
7048         if ($format ne 'rss' && $format ne 'atom') {
7049                 die_error(400, "Unknown web feed format");
7050         }
7051
7052         # log/feed of current (HEAD) branch, log of given branch, history of file/directory
7053         my $head = $hash || 'HEAD';
7054         my @commitlist = parse_commits($head, 150, 0, $file_name);
7055
7056         my %latest_commit;
7057         my %latest_date;
7058         my $content_type = "application/$format+xml";
7059         if (defined $cgi->http('HTTP_ACCEPT') &&
7060                  $cgi->Accept('text/xml') > $cgi->Accept($content_type)) {
7061                 # browser (feed reader) prefers text/xml
7062                 $content_type = 'text/xml';
7063         }
7064         if (defined($commitlist[0])) {
7065                 %latest_commit = %{$commitlist[0]};
7066                 my $latest_epoch = $latest_commit{'committer_epoch'};
7067                 %latest_date   = parse_date($latest_epoch);
7068                 my $if_modified = $cgi->http('IF_MODIFIED_SINCE');
7069                 if (defined $if_modified) {
7070                         my $since;
7071                         if (eval { require HTTP::Date; 1; }) {
7072                                 $since = HTTP::Date::str2time($if_modified);
7073                         } elsif (eval { require Time::ParseDate; 1; }) {
7074                                 $since = Time::ParseDate::parsedate($if_modified, GMT => 1);
7075                         }
7076                         if (defined $since && $latest_epoch <= $since) {
7077                                 print $cgi->header(
7078                                         -type => $content_type,
7079                                         -charset => 'utf-8',
7080                                         -last_modified => $latest_date{'rfc2822'},
7081                                         -status => '304 Not Modified');
7082                                 return;
7083                         }
7084                 }
7085                 print $cgi->header(
7086                         -type => $content_type,
7087                         -charset => 'utf-8',
7088                         -last_modified => $latest_date{'rfc2822'});
7089         } else {
7090                 print $cgi->header(
7091                         -type => $content_type,
7092                         -charset => 'utf-8');
7093         }
7094
7095         # Optimization: skip generating the body if client asks only
7096         # for Last-Modified date.
7097         return if ($cgi->request_method() eq 'HEAD');
7098
7099         # header variables
7100         my $title = "$site_name - $project/$action";
7101         my $feed_type = 'log';
7102         if (defined $hash) {
7103                 $title .= " - '$hash'";
7104                 $feed_type = 'branch log';
7105                 if (defined $file_name) {
7106                         $title .= " :: $file_name";
7107                         $feed_type = 'history';
7108                 }
7109         } elsif (defined $file_name) {
7110                 $title .= " - $file_name";
7111                 $feed_type = 'history';
7112         }
7113         $title .= " $feed_type";
7114         my $descr = git_get_project_description($project);
7115         if (defined $descr) {
7116                 $descr = esc_html($descr);
7117         } else {
7118                 $descr = "$project " .
7119                          ($format eq 'rss' ? 'RSS' : 'Atom') .
7120                          " feed";
7121         }
7122         my $owner = git_get_project_owner($project);
7123         $owner = esc_html($owner);
7124
7125         #header
7126         my $alt_url;
7127         if (defined $file_name) {
7128                 $alt_url = href(-full=>1, action=>"history", hash=>$hash, file_name=>$file_name);
7129         } elsif (defined $hash) {
7130                 $alt_url = href(-full=>1, action=>"log", hash=>$hash);
7131         } else {
7132                 $alt_url = href(-full=>1, action=>"summary");
7133         }
7134         print qq!<?xml version="1.0" encoding="utf-8"?>\n!;
7135         if ($format eq 'rss') {
7136                 print <<XML;
7137 <rss version="2.0" xmlns:content="http://purl.org/rss/1.0/modules/content/">
7138 <channel>
7139 XML
7140                 print "<title>$title</title>\n" .
7141                       "<link>$alt_url</link>\n" .
7142                       "<description>$descr</description>\n" .
7143                       "<language>en</language>\n" .
7144                       # project owner is responsible for 'editorial' content
7145                       "<managingEditor>$owner</managingEditor>\n";
7146                 if (defined $logo || defined $favicon) {
7147                         # prefer the logo to the favicon, since RSS
7148                         # doesn't allow both
7149                         my $img = esc_url($logo || $favicon);
7150                         print "<image>\n" .
7151                               "<url>$img</url>\n" .
7152                               "<title>$title</title>\n" .
7153                               "<link>$alt_url</link>\n" .
7154                               "</image>\n";
7155                 }
7156                 if (%latest_date) {
7157                         print "<pubDate>$latest_date{'rfc2822'}</pubDate>\n";
7158                         print "<lastBuildDate>$latest_date{'rfc2822'}</lastBuildDate>\n";
7159                 }
7160                 print "<generator>gitweb v.$version/$git_version</generator>\n";
7161         } elsif ($format eq 'atom') {
7162                 print <<XML;
7163 <feed xmlns="http://www.w3.org/2005/Atom">
7164 XML
7165                 print "<title>$title</title>\n" .
7166                       "<subtitle>$descr</subtitle>\n" .
7167                       '<link rel="alternate" type="text/html" href="' .
7168                       $alt_url . '" />' . "\n" .
7169                       '<link rel="self" type="' . $content_type . '" href="' .
7170                       $cgi->self_url() . '" />' . "\n" .
7171                       "<id>" . href(-full=>1) . "</id>\n" .
7172                       # use project owner for feed author
7173                       "<author><name>$owner</name></author>\n";
7174                 if (defined $favicon) {
7175                         print "<icon>" . esc_url($favicon) . "</icon>\n";
7176                 }
7177                 if (defined $logo) {
7178                         # not twice as wide as tall: 72 x 27 pixels
7179                         print "<logo>" . esc_url($logo) . "</logo>\n";
7180                 }
7181                 if (! %latest_date) {
7182                         # dummy date to keep the feed valid until commits trickle in:
7183                         print "<updated>1970-01-01T00:00:00Z</updated>\n";
7184                 } else {
7185                         print "<updated>$latest_date{'iso-8601'}</updated>\n";
7186                 }
7187                 print "<generator version='$version/$git_version'>gitweb</generator>\n";
7188         }
7189
7190         # contents
7191         for (my $i = 0; $i <= $#commitlist; $i++) {
7192                 my %co = %{$commitlist[$i]};
7193                 my $commit = $co{'id'};
7194                 # we read 150, we always show 30 and the ones more recent than 48 hours
7195                 if (($i >= 20) && ((time - $co{'author_epoch'}) > 48*60*60)) {
7196                         last;
7197                 }
7198                 my %cd = parse_date($co{'author_epoch'});
7199
7200                 # get list of changed files
7201                 open my $fd, "-|", git_cmd(), "diff-tree", '-r', @diff_opts,
7202                         $co{'parent'} || "--root",
7203                         $co{'id'}, "--", (defined $file_name ? $file_name : ())
7204                         or next;
7205                 my @difftree = map { chomp; $_ } <$fd>;
7206                 close $fd
7207                         or next;
7208
7209                 # print element (entry, item)
7210                 my $co_url = href(-full=>1, action=>"commitdiff", hash=>$commit);
7211                 if ($format eq 'rss') {
7212                         print "<item>\n" .
7213                               "<title>" . esc_html($co{'title'}) . "</title>\n" .
7214                               "<author>" . esc_html($co{'author'}) . "</author>\n" .
7215                               "<pubDate>$cd{'rfc2822'}</pubDate>\n" .
7216                               "<guid isPermaLink=\"true\">$co_url</guid>\n" .
7217                               "<link>$co_url</link>\n" .
7218                               "<description>" . esc_html($co{'title'}) . "</description>\n" .
7219                               "<content:encoded>" .
7220                               "<![CDATA[\n";
7221                 } elsif ($format eq 'atom') {
7222                         print "<entry>\n" .
7223                               "<title type=\"html\">" . esc_html($co{'title'}) . "</title>\n" .
7224                               "<updated>$cd{'iso-8601'}</updated>\n" .
7225                               "<author>\n" .
7226                               "  <name>" . esc_html($co{'author_name'}) . "</name>\n";
7227                         if ($co{'author_email'}) {
7228                                 print "  <email>" . esc_html($co{'author_email'}) . "</email>\n";
7229                         }
7230                         print "</author>\n" .
7231                               # use committer for contributor
7232                               "<contributor>\n" .
7233                               "  <name>" . esc_html($co{'committer_name'}) . "</name>\n";
7234                         if ($co{'committer_email'}) {
7235                                 print "  <email>" . esc_html($co{'committer_email'}) . "</email>\n";
7236                         }
7237                         print "</contributor>\n" .
7238                               "<published>$cd{'iso-8601'}</published>\n" .
7239                               "<link rel=\"alternate\" type=\"text/html\" href=\"$co_url\" />\n" .
7240                               "<id>$co_url</id>\n" .
7241                               "<content type=\"xhtml\" xml:base=\"" . esc_url($my_url) . "\">\n" .
7242                               "<div xmlns=\"http://www.w3.org/1999/xhtml\">\n";
7243                 }
7244                 my $comment = $co{'comment'};
7245                 print "<pre>\n";
7246                 foreach my $line (@$comment) {
7247                         $line = esc_html($line);
7248                         print "$line\n";
7249                 }
7250                 print "</pre><ul>\n";
7251                 foreach my $difftree_line (@difftree) {
7252                         my %difftree = parse_difftree_raw_line($difftree_line);
7253                         next if !$difftree{'from_id'};
7254
7255                         my $file = $difftree{'file'} || $difftree{'to_file'};
7256
7257                         print "<li>" .
7258                               "[" .
7259                               $cgi->a({-href => href(-full=>1, action=>"blobdiff",
7260                                                      hash=>$difftree{'to_id'}, hash_parent=>$difftree{'from_id'},
7261                                                      hash_base=>$co{'id'}, hash_parent_base=>$co{'parent'},
7262                                                      file_name=>$file, file_parent=>$difftree{'from_file'}),
7263                                       -title => "diff"}, 'D');
7264                         if ($have_blame) {
7265                                 print $cgi->a({-href => href(-full=>1, action=>"blame",
7266                                                              file_name=>$file, hash_base=>$commit),
7267                                               -title => "blame"}, 'B');
7268                         }
7269                         # if this is not a feed of a file history
7270                         if (!defined $file_name || $file_name ne $file) {
7271                                 print $cgi->a({-href => href(-full=>1, action=>"history",
7272                                                              file_name=>$file, hash=>$commit),
7273                                               -title => "history"}, 'H');
7274                         }
7275                         $file = esc_path($file);
7276                         print "] ".
7277                               "$file</li>\n";
7278                 }
7279                 if ($format eq 'rss') {
7280                         print "</ul>]]>\n" .
7281                               "</content:encoded>\n" .
7282                               "</item>\n";
7283                 } elsif ($format eq 'atom') {
7284                         print "</ul>\n</div>\n" .
7285                               "</content>\n" .
7286                               "</entry>\n";
7287                 }
7288         }
7289
7290         # end of feed
7291         if ($format eq 'rss') {
7292                 print "</channel>\n</rss>\n";
7293         } elsif ($format eq 'atom') {
7294                 print "</feed>\n";
7295         }
7296 }
7297
7298 sub git_rss {
7299         git_feed('rss');
7300 }
7301
7302 sub git_atom {
7303         git_feed('atom');
7304 }
7305
7306 sub git_opml {
7307         my @list = git_get_projects_list();
7308
7309         print $cgi->header(
7310                 -type => 'text/xml',
7311                 -charset => 'utf-8',
7312                 -content_disposition => 'inline; filename="opml.xml"');
7313
7314         print <<XML;
7315 <?xml version="1.0" encoding="utf-8"?>
7316 <opml version="1.0">
7317 <head>
7318   <title>$site_name OPML Export</title>
7319 </head>
7320 <body>
7321 <outline text="git RSS feeds">
7322 XML
7323
7324         foreach my $pr (@list) {
7325                 my %proj = %$pr;
7326                 my $head = git_get_head_hash($proj{'path'});
7327                 if (!defined $head) {
7328                         next;
7329                 }
7330                 $git_dir = "$projectroot/$proj{'path'}";
7331                 my %co = parse_commit($head);
7332                 if (!%co) {
7333                         next;
7334                 }
7335
7336                 my $path = esc_html(chop_str($proj{'path'}, 25, 5));
7337                 my $rss  = href('project' => $proj{'path'}, 'action' => 'rss', -full => 1);
7338                 my $html = href('project' => $proj{'path'}, 'action' => 'summary', -full => 1);
7339                 print "<outline type=\"rss\" text=\"$path\" title=\"$path\" xmlUrl=\"$rss\" htmlUrl=\"$html\"/>\n";
7340         }
7341         print <<XML;
7342 </outline>
7343 </body>
7344 </opml>
7345 XML
7346 }