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, $sec;
2915
2916         my ($tz_sign, $tz_hour, $tz_min) =
2917                 ($tz =~ m/^([-+])(\d\d)(\d\d)$/);
2918         $tz_sign = ($tz_sign eq '-' ? -1 : +1);
2919         my $local = $epoch + $tz_sign*((($tz_hour*60) + $tz_min)*60);
2920         ($sec, $min, $hour, $mday, $mon, $year, $wday, $yday) = gmtime($local);
2921         $date{'hour_local'} = $hour;
2922         $date{'minute_local'} = $min;
2923         $date{'tz_local'} = $tz;
2924         $date{'iso-tz'} = sprintf("%04d-%02d-%02d %02d:%02d:%02d %s",
2925                                   1900+$year, $mon+1, $mday,
2926                                   $hour, $min, $sec, $tz);
2927         return %date;
2928 }
2929
2930 sub parse_tag {
2931         my $tag_id = shift;
2932         my %tag;
2933         my @comment;
2934
2935         open my $fd, "-|", git_cmd(), "cat-file", "tag", $tag_id or return;
2936         $tag{'id'} = $tag_id;
2937         while (my $line = <$fd>) {
2938                 chomp $line;
2939                 if ($line =~ m/^object ([0-9a-fA-F]{40})$/) {
2940                         $tag{'object'} = $1;
2941                 } elsif ($line =~ m/^type (.+)$/) {
2942                         $tag{'type'} = $1;
2943                 } elsif ($line =~ m/^tag (.+)$/) {
2944                         $tag{'name'} = $1;
2945                 } elsif ($line =~ m/^tagger (.*) ([0-9]+) (.*)$/) {
2946                         $tag{'author'} = $1;
2947                         $tag{'author_epoch'} = $2;
2948                         $tag{'author_tz'} = $3;
2949                         if ($tag{'author'} =~ m/^([^<]+) <([^>]*)>/) {
2950                                 $tag{'author_name'}  = $1;
2951                                 $tag{'author_email'} = $2;
2952                         } else {
2953                                 $tag{'author_name'} = $tag{'author'};
2954                         }
2955                 } elsif ($line =~ m/--BEGIN/) {
2956                         push @comment, $line;
2957                         last;
2958                 } elsif ($line eq "") {
2959                         last;
2960                 }
2961         }
2962         push @comment, <$fd>;
2963         $tag{'comment'} = \@comment;
2964         close $fd or return;
2965         if (!defined $tag{'name'}) {
2966                 return
2967         };
2968         return %tag
2969 }
2970
2971 sub parse_commit_text {
2972         my ($commit_text, $withparents) = @_;
2973         my @commit_lines = split '\n', $commit_text;
2974         my %co;
2975
2976         pop @commit_lines; # Remove '\0'
2977
2978         if (! @commit_lines) {
2979                 return;
2980         }
2981
2982         my $header = shift @commit_lines;
2983         if ($header !~ m/^[0-9a-fA-F]{40}/) {
2984                 return;
2985         }
2986         ($co{'id'}, my @parents) = split ' ', $header;
2987         while (my $line = shift @commit_lines) {
2988                 last if $line eq "\n";
2989                 if ($line =~ m/^tree ([0-9a-fA-F]{40})$/) {
2990                         $co{'tree'} = $1;
2991                 } elsif ((!defined $withparents) && ($line =~ m/^parent ([0-9a-fA-F]{40})$/)) {
2992                         push @parents, $1;
2993                 } elsif ($line =~ m/^author (.*) ([0-9]+) (.*)$/) {
2994                         $co{'author'} = to_utf8($1);
2995                         $co{'author_epoch'} = $2;
2996                         $co{'author_tz'} = $3;
2997                         if ($co{'author'} =~ m/^([^<]+) <([^>]*)>/) {
2998                                 $co{'author_name'}  = $1;
2999                                 $co{'author_email'} = $2;
3000                         } else {
3001                                 $co{'author_name'} = $co{'author'};
3002                         }
3003                 } elsif ($line =~ m/^committer (.*) ([0-9]+) (.*)$/) {
3004                         $co{'committer'} = to_utf8($1);
3005                         $co{'committer_epoch'} = $2;
3006                         $co{'committer_tz'} = $3;
3007                         if ($co{'committer'} =~ m/^([^<]+) <([^>]*)>/) {
3008                                 $co{'committer_name'}  = $1;
3009                                 $co{'committer_email'} = $2;
3010                         } else {
3011                                 $co{'committer_name'} = $co{'committer'};
3012                         }
3013                 }
3014         }
3015         if (!defined $co{'tree'}) {
3016                 return;
3017         };
3018         $co{'parents'} = \@parents;
3019         $co{'parent'} = $parents[0];
3020
3021         foreach my $title (@commit_lines) {
3022                 $title =~ s/^    //;
3023                 if ($title ne "") {
3024                         $co{'title'} = chop_str($title, 80, 5);
3025                         # remove leading stuff of merges to make the interesting part visible
3026                         if (length($title) > 50) {
3027                                 $title =~ s/^Automatic //;
3028                                 $title =~ s/^merge (of|with) /Merge ... /i;
3029                                 if (length($title) > 50) {
3030                                         $title =~ s/(http|rsync):\/\///;
3031                                 }
3032                                 if (length($title) > 50) {
3033                                         $title =~ s/(master|www|rsync)\.//;
3034                                 }
3035                                 if (length($title) > 50) {
3036                                         $title =~ s/kernel.org:?//;
3037                                 }
3038                                 if (length($title) > 50) {
3039                                         $title =~ s/\/pub\/scm//;
3040                                 }
3041                         }
3042                         $co{'title_short'} = chop_str($title, 50, 5);
3043                         last;
3044                 }
3045         }
3046         if (! defined $co{'title'} || $co{'title'} eq "") {
3047                 $co{'title'} = $co{'title_short'} = '(no commit message)';
3048         }
3049         # remove added spaces
3050         foreach my $line (@commit_lines) {
3051                 $line =~ s/^    //;
3052         }
3053         $co{'comment'} = \@commit_lines;
3054
3055         my $age = time - $co{'committer_epoch'};
3056         $co{'age'} = $age;
3057         $co{'age_string'} = age_string($age);
3058         my ($sec, $min, $hour, $mday, $mon, $year, $wday, $yday) = gmtime($co{'committer_epoch'});
3059         if ($age > 60*60*24*7*2) {
3060                 $co{'age_string_date'} = sprintf "%4i-%02u-%02i", 1900 + $year, $mon+1, $mday;
3061                 $co{'age_string_age'} = $co{'age_string'};
3062         } else {
3063                 $co{'age_string_date'} = $co{'age_string'};
3064                 $co{'age_string_age'} = sprintf "%4i-%02u-%02i", 1900 + $year, $mon+1, $mday;
3065         }
3066         return %co;
3067 }
3068
3069 sub parse_commit {
3070         my ($commit_id) = @_;
3071         my %co;
3072
3073         local $/ = "\0";
3074
3075         open my $fd, "-|", git_cmd(), "rev-list",
3076                 "--parents",
3077                 "--header",
3078                 "--max-count=1",
3079                 $commit_id,
3080                 "--",
3081                 or die_error(500, "Open git-rev-list failed");
3082         %co = parse_commit_text(<$fd>, 1);
3083         close $fd;
3084
3085         return %co;
3086 }
3087
3088 sub parse_commits {
3089         my ($commit_id, $maxcount, $skip, $filename, @args) = @_;
3090         my @cos;
3091
3092         $maxcount ||= 1;
3093         $skip ||= 0;
3094
3095         local $/ = "\0";
3096
3097         open my $fd, "-|", git_cmd(), "rev-list",
3098                 "--header",
3099                 @args,
3100                 ("--max-count=" . $maxcount),
3101                 ("--skip=" . $skip),
3102                 @extra_options,
3103                 $commit_id,
3104                 "--",
3105                 ($filename ? ($filename) : ())
3106                 or die_error(500, "Open git-rev-list failed");
3107         while (my $line = <$fd>) {
3108                 my %co = parse_commit_text($line);
3109                 push @cos, \%co;
3110         }
3111         close $fd;
3112
3113         return wantarray ? @cos : \@cos;
3114 }
3115
3116 # parse line of git-diff-tree "raw" output
3117 sub parse_difftree_raw_line {
3118         my $line = shift;
3119         my %res;
3120
3121         # ':100644 100644 03b218260e99b78c6df0ed378e59ed9205ccc96d 3b93d5e7cc7f7dd4ebed13a5cc1a4ad976fc94d8 M   ls-files.c'
3122         # ':100644 100644 7f9281985086971d3877aca27704f2aaf9c448ce bc190ebc71bbd923f2b728e505408f5e54bd073a M   rev-tree.c'
3123         if ($line =~ m/^:([0-7]{6}) ([0-7]{6}) ([0-9a-fA-F]{40}) ([0-9a-fA-F]{40}) (.)([0-9]{0,3})\t(.*)$/) {
3124                 $res{'from_mode'} = $1;
3125                 $res{'to_mode'} = $2;
3126                 $res{'from_id'} = $3;
3127                 $res{'to_id'} = $4;
3128                 $res{'status'} = $5;
3129                 $res{'similarity'} = $6;
3130                 if ($res{'status'} eq 'R' || $res{'status'} eq 'C') { # renamed or copied
3131                         ($res{'from_file'}, $res{'to_file'}) = map { unquote($_) } split("\t", $7);
3132                 } else {
3133                         $res{'from_file'} = $res{'to_file'} = $res{'file'} = unquote($7);
3134                 }
3135         }
3136         # '::100755 100755 100755 60e79ca1b01bc8b057abe17ddab484699a7f5fdb 94067cc5f73388f33722d52ae02f44692bc07490 94067cc5f73388f33722d52ae02f44692bc07490 MR git-gui/git-gui.sh'
3137         # combined diff (for merge commit)
3138         elsif ($line =~ s/^(::+)((?:[0-7]{6} )+)((?:[0-9a-fA-F]{40} )+)([a-zA-Z]+)\t(.*)$//) {
3139                 $res{'nparents'}  = length($1);
3140                 $res{'from_mode'} = [ split(' ', $2) ];
3141                 $res{'to_mode'} = pop @{$res{'from_mode'}};
3142                 $res{'from_id'} = [ split(' ', $3) ];
3143                 $res{'to_id'} = pop @{$res{'from_id'}};
3144                 $res{'status'} = [ split('', $4) ];
3145                 $res{'to_file'} = unquote($5);
3146         }
3147         # 'c512b523472485aef4fff9e57b229d9d243c967f'
3148         elsif ($line =~ m/^([0-9a-fA-F]{40})$/) {
3149                 $res{'commit'} = $1;
3150         }
3151
3152         return wantarray ? %res : \%res;
3153 }
3154
3155 # wrapper: return parsed line of git-diff-tree "raw" output
3156 # (the argument might be raw line, or parsed info)
3157 sub parsed_difftree_line {
3158         my $line_or_ref = shift;
3159
3160         if (ref($line_or_ref) eq "HASH") {
3161                 # pre-parsed (or generated by hand)
3162                 return $line_or_ref;
3163         } else {
3164                 return parse_difftree_raw_line($line_or_ref);
3165         }
3166 }
3167
3168 # parse line of git-ls-tree output
3169 sub parse_ls_tree_line {
3170         my $line = shift;
3171         my %opts = @_;
3172         my %res;
3173
3174         if ($opts{'-l'}) {
3175                 #'100644 blob 0fa3f3a66fb6a137f6ec2c19351ed4d807070ffa   16717  panic.c'
3176                 $line =~ m/^([0-9]+) (.+) ([0-9a-fA-F]{40}) +(-|[0-9]+)\t(.+)$/s;
3177
3178                 $res{'mode'} = $1;
3179                 $res{'type'} = $2;
3180                 $res{'hash'} = $3;
3181                 $res{'size'} = $4;
3182                 if ($opts{'-z'}) {
3183                         $res{'name'} = $5;
3184                 } else {
3185                         $res{'name'} = unquote($5);
3186                 }
3187         } else {
3188                 #'100644 blob 0fa3f3a66fb6a137f6ec2c19351ed4d807070ffa  panic.c'
3189                 $line =~ m/^([0-9]+) (.+) ([0-9a-fA-F]{40})\t(.+)$/s;
3190
3191                 $res{'mode'} = $1;
3192                 $res{'type'} = $2;
3193                 $res{'hash'} = $3;
3194                 if ($opts{'-z'}) {
3195                         $res{'name'} = $4;
3196                 } else {
3197                         $res{'name'} = unquote($4);
3198                 }
3199         }
3200
3201         return wantarray ? %res : \%res;
3202 }
3203
3204 # generates _two_ hashes, references to which are passed as 2 and 3 argument
3205 sub parse_from_to_diffinfo {
3206         my ($diffinfo, $from, $to, @parents) = @_;
3207
3208         if ($diffinfo->{'nparents'}) {
3209                 # combined diff
3210                 $from->{'file'} = [];
3211                 $from->{'href'} = [];
3212                 fill_from_file_info($diffinfo, @parents)
3213                         unless exists $diffinfo->{'from_file'};
3214                 for (my $i = 0; $i < $diffinfo->{'nparents'}; $i++) {
3215                         $from->{'file'}[$i] =
3216                                 defined $diffinfo->{'from_file'}[$i] ?
3217                                         $diffinfo->{'from_file'}[$i] :
3218                                         $diffinfo->{'to_file'};
3219                         if ($diffinfo->{'status'}[$i] ne "A") { # not new (added) file
3220                                 $from->{'href'}[$i] = href(action=>"blob",
3221                                                            hash_base=>$parents[$i],
3222                                                            hash=>$diffinfo->{'from_id'}[$i],
3223                                                            file_name=>$from->{'file'}[$i]);
3224                         } else {
3225                                 $from->{'href'}[$i] = undef;
3226                         }
3227                 }
3228         } else {
3229                 # ordinary (not combined) diff
3230                 $from->{'file'} = $diffinfo->{'from_file'};
3231                 if ($diffinfo->{'status'} ne "A") { # not new (added) file
3232                         $from->{'href'} = href(action=>"blob", hash_base=>$hash_parent,
3233                                                hash=>$diffinfo->{'from_id'},
3234                                                file_name=>$from->{'file'});
3235                 } else {
3236                         delete $from->{'href'};
3237                 }
3238         }
3239
3240         $to->{'file'} = $diffinfo->{'to_file'};
3241         if (!is_deleted($diffinfo)) { # file exists in result
3242                 $to->{'href'} = href(action=>"blob", hash_base=>$hash,
3243                                      hash=>$diffinfo->{'to_id'},
3244                                      file_name=>$to->{'file'});
3245         } else {
3246                 delete $to->{'href'};
3247         }
3248 }
3249
3250 ## ......................................................................
3251 ## parse to array of hashes functions
3252
3253 sub git_get_heads_list {
3254         my ($limit, @classes) = @_;
3255         @classes = ('heads') unless @classes;
3256         my @patterns = map { "refs/$_" } @classes;
3257         my @headslist;
3258
3259         open my $fd, '-|', git_cmd(), 'for-each-ref',
3260                 ($limit ? '--count='.($limit+1) : ()), '--sort=-committerdate',
3261                 '--format=%(objectname) %(refname) %(subject)%00%(committer)',
3262                 @patterns
3263                 or return;
3264         while (my $line = <$fd>) {
3265                 my %ref_item;
3266
3267                 chomp $line;
3268                 my ($refinfo, $committerinfo) = split(/\0/, $line);
3269                 my ($hash, $name, $title) = split(' ', $refinfo, 3);
3270                 my ($committer, $epoch, $tz) =
3271                         ($committerinfo =~ /^(.*) ([0-9]+) (.*)$/);
3272                 $ref_item{'fullname'}  = $name;
3273                 $name =~ s!^refs/(?:head|remote)s/!!;
3274
3275                 $ref_item{'name'}  = $name;
3276                 $ref_item{'id'}    = $hash;
3277                 $ref_item{'title'} = $title || '(no commit message)';
3278                 $ref_item{'epoch'} = $epoch;
3279                 if ($epoch) {
3280                         $ref_item{'age'} = age_string(time - $ref_item{'epoch'});
3281                 } else {
3282                         $ref_item{'age'} = "unknown";
3283                 }
3284
3285                 push @headslist, \%ref_item;
3286         }
3287         close $fd;
3288
3289         return wantarray ? @headslist : \@headslist;
3290 }
3291
3292 sub git_get_tags_list {
3293         my $limit = shift;
3294         my @tagslist;
3295
3296         open my $fd, '-|', git_cmd(), 'for-each-ref',
3297                 ($limit ? '--count='.($limit+1) : ()), '--sort=-creatordate',
3298                 '--format=%(objectname) %(objecttype) %(refname) '.
3299                 '%(*objectname) %(*objecttype) %(subject)%00%(creator)',
3300                 'refs/tags'
3301                 or return;
3302         while (my $line = <$fd>) {
3303                 my %ref_item;
3304
3305                 chomp $line;
3306                 my ($refinfo, $creatorinfo) = split(/\0/, $line);
3307                 my ($id, $type, $name, $refid, $reftype, $title) = split(' ', $refinfo, 6);
3308                 my ($creator, $epoch, $tz) =
3309                         ($creatorinfo =~ /^(.*) ([0-9]+) (.*)$/);
3310                 $ref_item{'fullname'} = $name;
3311                 $name =~ s!^refs/tags/!!;
3312
3313                 $ref_item{'type'} = $type;
3314                 $ref_item{'id'} = $id;
3315                 $ref_item{'name'} = $name;
3316                 if ($type eq "tag") {
3317                         $ref_item{'subject'} = $title;
3318                         $ref_item{'reftype'} = $reftype;
3319                         $ref_item{'refid'}   = $refid;
3320                 } else {
3321                         $ref_item{'reftype'} = $type;
3322                         $ref_item{'refid'}   = $id;
3323                 }
3324
3325                 if ($type eq "tag" || $type eq "commit") {
3326                         $ref_item{'epoch'} = $epoch;
3327                         if ($epoch) {
3328                                 $ref_item{'age'} = age_string(time - $ref_item{'epoch'});
3329                         } else {
3330                                 $ref_item{'age'} = "unknown";
3331                         }
3332                 }
3333
3334                 push @tagslist, \%ref_item;
3335         }
3336         close $fd;
3337
3338         return wantarray ? @tagslist : \@tagslist;
3339 }
3340
3341 ## ----------------------------------------------------------------------
3342 ## filesystem-related functions
3343
3344 sub get_file_owner {
3345         my $path = shift;
3346
3347         my ($dev, $ino, $mode, $nlink, $st_uid, $st_gid, $rdev, $size) = stat($path);
3348         my ($name, $passwd, $uid, $gid, $quota, $comment, $gcos, $dir, $shell) = getpwuid($st_uid);
3349         if (!defined $gcos) {
3350                 return undef;
3351         }
3352         my $owner = $gcos;
3353         $owner =~ s/[,;].*$//;
3354         return to_utf8($owner);
3355 }
3356
3357 # assume that file exists
3358 sub insert_file {
3359         my $filename = shift;
3360
3361         open my $fd, '<', $filename;
3362         print map { to_utf8($_) } <$fd>;
3363         close $fd;
3364 }
3365
3366 ## ......................................................................
3367 ## mimetype related functions
3368
3369 sub mimetype_guess_file {
3370         my $filename = shift;
3371         my $mimemap = shift;
3372         -r $mimemap or return undef;
3373
3374         my %mimemap;
3375         open(my $mh, '<', $mimemap) or return undef;
3376         while (<$mh>) {
3377                 next if m/^#/; # skip comments
3378                 my ($mimetype, $exts) = split(/\t+/);
3379                 if (defined $exts) {
3380                         my @exts = split(/\s+/, $exts);
3381                         foreach my $ext (@exts) {
3382                                 $mimemap{$ext} = $mimetype;
3383                         }
3384                 }
3385         }
3386         close($mh);
3387
3388         $filename =~ /\.([^.]*)$/;
3389         return $mimemap{$1};
3390 }
3391
3392 sub mimetype_guess {
3393         my $filename = shift;
3394         my $mime;
3395         $filename =~ /\./ or return undef;
3396
3397         if ($mimetypes_file) {
3398                 my $file = $mimetypes_file;
3399                 if ($file !~ m!^/!) { # if it is relative path
3400                         # it is relative to project
3401                         $file = "$projectroot/$project/$file";
3402                 }
3403                 $mime = mimetype_guess_file($filename, $file);
3404         }
3405         $mime ||= mimetype_guess_file($filename, '/etc/mime.types');
3406         return $mime;
3407 }
3408
3409 sub blob_mimetype {
3410         my $fd = shift;
3411         my $filename = shift;
3412
3413         if ($filename) {
3414                 my $mime = mimetype_guess($filename);
3415                 $mime and return $mime;
3416         }
3417
3418         # just in case
3419         return $default_blob_plain_mimetype unless $fd;
3420
3421         if (-T $fd) {
3422                 return 'text/plain';
3423         } elsif (! $filename) {
3424                 return 'application/octet-stream';
3425         } elsif ($filename =~ m/\.png$/i) {
3426                 return 'image/png';
3427         } elsif ($filename =~ m/\.gif$/i) {
3428                 return 'image/gif';
3429         } elsif ($filename =~ m/\.jpe?g$/i) {
3430                 return 'image/jpeg';
3431         } else {
3432                 return 'application/octet-stream';
3433         }
3434 }
3435
3436 sub blob_contenttype {
3437         my ($fd, $file_name, $type) = @_;
3438
3439         $type ||= blob_mimetype($fd, $file_name);
3440         if ($type eq 'text/plain' && defined $default_text_plain_charset) {
3441                 $type .= "; charset=$default_text_plain_charset";
3442         }
3443
3444         return $type;
3445 }
3446
3447 # guess file syntax for syntax highlighting; return undef if no highlighting
3448 # the name of syntax can (in the future) depend on syntax highlighter used
3449 sub guess_file_syntax {
3450         my ($highlight, $mimetype, $file_name) = @_;
3451         return undef unless ($highlight && defined $file_name);
3452         my $basename = basename($file_name, '.in');
3453         return $highlight_basename{$basename}
3454                 if exists $highlight_basename{$basename};
3455
3456         $basename =~ /\.([^.]*)$/;
3457         my $ext = $1 or return undef;
3458         return $highlight_ext{$ext}
3459                 if exists $highlight_ext{$ext};
3460
3461         return undef;
3462 }
3463
3464 # run highlighter and return FD of its output,
3465 # or return original FD if no highlighting
3466 sub run_highlighter {
3467         my ($fd, $highlight, $syntax) = @_;
3468         return $fd unless ($highlight && defined $syntax);
3469
3470         close $fd;
3471         open $fd, quote_command(git_cmd(), "cat-file", "blob", $hash)." | ".
3472                   quote_command($highlight_bin).
3473                   " --replace-tabs=8 --fragment --syntax $syntax |"
3474                 or die_error(500, "Couldn't open file or run syntax highlighter");
3475         return $fd;
3476 }
3477
3478 ## ======================================================================
3479 ## functions printing HTML: header, footer, error page
3480
3481 sub get_page_title {
3482         my $title = to_utf8($site_name);
3483
3484         return $title unless (defined $project);
3485         $title .= " - " . to_utf8($project);
3486
3487         return $title unless (defined $action);
3488         $title .= "/$action"; # $action is US-ASCII (7bit ASCII)
3489
3490         return $title unless (defined $file_name);
3491         $title .= " - " . esc_path($file_name);
3492         if ($action eq "tree" && $file_name !~ m|/$|) {
3493                 $title .= "/";
3494         }
3495
3496         return $title;
3497 }
3498
3499 sub print_feed_meta {
3500         if (defined $project) {
3501                 my %href_params = get_feed_info();
3502                 if (!exists $href_params{'-title'}) {
3503                         $href_params{'-title'} = 'log';
3504                 }
3505
3506                 foreach my $format (qw(RSS Atom)) {
3507                         my $type = lc($format);
3508                         my %link_attr = (
3509                                 '-rel' => 'alternate',
3510                                 '-title' => esc_attr("$project - $href_params{'-title'} - $format feed"),
3511                                 '-type' => "application/$type+xml"
3512                         );
3513
3514                         $href_params{'action'} = $type;
3515                         $link_attr{'-href'} = href(%href_params);
3516                         print "<link ".
3517                               "rel=\"$link_attr{'-rel'}\" ".
3518                               "title=\"$link_attr{'-title'}\" ".
3519                               "href=\"$link_attr{'-href'}\" ".
3520                               "type=\"$link_attr{'-type'}\" ".
3521                               "/>\n";
3522
3523                         $href_params{'extra_options'} = '--no-merges';
3524                         $link_attr{'-href'} = href(%href_params);
3525                         $link_attr{'-title'} .= ' (no merges)';
3526                         print "<link ".
3527                               "rel=\"$link_attr{'-rel'}\" ".
3528                               "title=\"$link_attr{'-title'}\" ".
3529                               "href=\"$link_attr{'-href'}\" ".
3530                               "type=\"$link_attr{'-type'}\" ".
3531                               "/>\n";
3532                 }
3533
3534         } else {
3535                 printf('<link rel="alternate" title="%s projects list" '.
3536                        'href="%s" type="text/plain; charset=utf-8" />'."\n",
3537                        esc_attr($site_name), href(project=>undef, action=>"project_index"));
3538                 printf('<link rel="alternate" title="%s projects feeds" '.
3539                        'href="%s" type="text/x-opml" />'."\n",
3540                        esc_attr($site_name), href(project=>undef, action=>"opml"));
3541         }
3542 }
3543
3544 sub git_header_html {
3545         my $status = shift || "200 OK";
3546         my $expires = shift;
3547         my %opts = @_;
3548
3549         my $title = get_page_title();
3550         my $content_type;
3551         # require explicit support from the UA if we are to send the page as
3552         # 'application/xhtml+xml', otherwise send it as plain old 'text/html'.
3553         # we have to do this because MSIE sometimes globs '*/*', pretending to
3554         # support xhtml+xml but choking when it gets what it asked for.
3555         if (defined $cgi->http('HTTP_ACCEPT') &&
3556             $cgi->http('HTTP_ACCEPT') =~ m/(,|;|\s|^)application\/xhtml\+xml(,|;|\s|$)/ &&
3557             $cgi->Accept('application/xhtml+xml') != 0) {
3558                 $content_type = 'application/xhtml+xml';
3559         } else {
3560                 $content_type = 'text/html';
3561         }
3562         print $cgi->header(-type=>$content_type, -charset => 'utf-8',
3563                            -status=> $status, -expires => $expires)
3564                 unless ($opts{'-no_http_header'});
3565         my $mod_perl_version = $ENV{'MOD_PERL'} ? " $ENV{'MOD_PERL'}" : '';
3566         print <<EOF;
3567 <?xml version="1.0" encoding="utf-8"?>
3568 <!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Strict//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-strict.dtd">
3569 <html xmlns="http://www.w3.org/1999/xhtml" xml:lang="en-US" lang="en-US">
3570 <!-- git web interface version $version, (C) 2005-2006, Kay Sievers <kay.sievers\@vrfy.org>, Christian Gierke -->
3571 <!-- git core binaries version $git_version -->
3572 <head>
3573 <meta http-equiv="content-type" content="$content_type; charset=utf-8"/>
3574 <meta name="generator" content="gitweb/$version git/$git_version$mod_perl_version"/>
3575 <meta name="robots" content="index, nofollow"/>
3576 <title>$title</title>
3577 EOF
3578         # the stylesheet, favicon etc urls won't work correctly with path_info
3579         # unless we set the appropriate base URL
3580         if ($ENV{'PATH_INFO'}) {
3581                 print "<base href=\"".esc_url($base_url)."\" />\n";
3582         }
3583         # print out each stylesheet that exist, providing backwards capability
3584         # for those people who defined $stylesheet in a config file
3585         if (defined $stylesheet) {
3586                 print '<link rel="stylesheet" type="text/css" href="'.esc_url($stylesheet).'"/>'."\n";
3587         } else {
3588                 foreach my $stylesheet (@stylesheets) {
3589                         next unless $stylesheet;
3590                         print '<link rel="stylesheet" type="text/css" href="'.esc_url($stylesheet).'"/>'."\n";
3591                 }
3592         }
3593         print_feed_meta()
3594                 if ($status eq '200 OK');
3595         if (defined $favicon) {
3596                 print qq(<link rel="shortcut icon" href=").esc_url($favicon).qq(" type="image/png" />\n);
3597         }
3598
3599         print "</head>\n" .
3600               "<body>\n";
3601
3602         if (defined $site_header && -f $site_header) {
3603                 insert_file($site_header);
3604         }
3605
3606         print "<div class=\"page_header\">\n";
3607         if (defined $logo) {
3608                 print $cgi->a({-href => esc_url($logo_url),
3609                                -title => $logo_label},
3610                               $cgi->img({-src => esc_url($logo),
3611                                          -width => 72, -height => 27,
3612                                          -alt => "git",
3613                                          -class => "logo"}));
3614         }
3615         print $cgi->a({-href => esc_url($home_link)}, $home_link_str) . " / ";
3616         if (defined $project) {
3617                 print $cgi->a({-href => href(action=>"summary")}, esc_html($project));
3618                 if (defined $action) {
3619                         my $action_print = $action ;
3620                         if (defined $opts{-action_extra}) {
3621                                 $action_print = $cgi->a({-href => href(action=>$action)},
3622                                         $action);
3623                         }
3624                         print " / $action_print";
3625                 }
3626                 if (defined $opts{-action_extra}) {
3627                         print " / $opts{-action_extra}";
3628                 }
3629                 print "\n";
3630         }
3631         print "</div>\n";
3632
3633         my $have_search = gitweb_check_feature('search');
3634         if (defined $project && $have_search) {
3635                 if (!defined $searchtext) {
3636                         $searchtext = "";
3637                 }
3638                 my $search_hash;
3639                 if (defined $hash_base) {
3640                         $search_hash = $hash_base;
3641                 } elsif (defined $hash) {
3642                         $search_hash = $hash;
3643                 } else {
3644                         $search_hash = "HEAD";
3645                 }
3646                 my $action = $my_uri;
3647                 my $use_pathinfo = gitweb_check_feature('pathinfo');
3648                 if ($use_pathinfo) {
3649                         $action .= "/".esc_url($project);
3650                 }
3651                 print $cgi->startform(-method => "get", -action => $action) .
3652                       "<div class=\"search\">\n" .
3653                       (!$use_pathinfo &&
3654                       $cgi->input({-name=>"p", -value=>$project, -type=>"hidden"}) . "\n") .
3655                       $cgi->input({-name=>"a", -value=>"search", -type=>"hidden"}) . "\n" .
3656                       $cgi->input({-name=>"h", -value=>$search_hash, -type=>"hidden"}) . "\n" .
3657                       $cgi->popup_menu(-name => 'st', -default => 'commit',
3658                                        -values => ['commit', 'grep', 'author', 'committer', 'pickaxe']) .
3659                       $cgi->sup($cgi->a({-href => href(action=>"search_help")}, "?")) .
3660                       " search:\n",
3661                       $cgi->textfield(-name => "s", -value => $searchtext) . "\n" .
3662                       "<span title=\"Extended regular expression\">" .
3663                       $cgi->checkbox(-name => 'sr', -value => 1, -label => 're',
3664                                      -checked => $search_use_regexp) .
3665                       "</span>" .
3666                       "</div>" .
3667                       $cgi->end_form() . "\n";
3668         }
3669 }
3670
3671 sub git_footer_html {
3672         my $feed_class = 'rss_logo';
3673
3674         print "<div class=\"page_footer\">\n";
3675         if (defined $project) {
3676                 my $descr = git_get_project_description($project);
3677                 if (defined $descr) {
3678                         print "<div class=\"page_footer_text\">" . esc_html($descr) . "</div>\n";
3679                 }
3680
3681                 my %href_params = get_feed_info();
3682                 if (!%href_params) {
3683                         $feed_class .= ' generic';
3684                 }
3685                 $href_params{'-title'} ||= 'log';
3686
3687                 foreach my $format (qw(RSS Atom)) {
3688                         $href_params{'action'} = lc($format);
3689                         print $cgi->a({-href => href(%href_params),
3690                                       -title => "$href_params{'-title'} $format feed",
3691                                       -class => $feed_class}, $format)."\n";
3692                 }
3693
3694         } else {
3695                 print $cgi->a({-href => href(project=>undef, action=>"opml"),
3696                               -class => $feed_class}, "OPML") . " ";
3697                 print $cgi->a({-href => href(project=>undef, action=>"project_index"),
3698                               -class => $feed_class}, "TXT") . "\n";
3699         }
3700         print "</div>\n"; # class="page_footer"
3701
3702         if (defined $t0 && gitweb_check_feature('timed')) {
3703                 print "<div id=\"generating_info\">\n";
3704                 print 'This page took '.
3705                       '<span id="generating_time" class="time_span">'.
3706                       tv_interval($t0, [ gettimeofday() ]).
3707                       ' seconds </span>'.
3708                       ' and '.
3709                       '<span id="generating_cmd">'.
3710                       $number_of_git_cmds.
3711                       '</span> git commands '.
3712                       " to generate.\n";
3713                 print "</div>\n"; # class="page_footer"
3714         }
3715
3716         if (defined $site_footer && -f $site_footer) {
3717                 insert_file($site_footer);
3718         }
3719
3720         print qq!<script type="text/javascript" src="!.esc_url($javascript).qq!"></script>\n!;
3721         if (defined $action &&
3722             $action eq 'blame_incremental') {
3723                 print qq!<script type="text/javascript">\n!.
3724                       qq!startBlame("!. href(action=>"blame_data", -replay=>1) .qq!",\n!.
3725                       qq!           "!. href() .qq!");\n!.
3726                       qq!</script>\n!;
3727         } elsif (gitweb_check_feature('javascript-actions')) {
3728                 print qq!<script type="text/javascript">\n!.
3729                       qq!window.onload = fixLinks;\n!.
3730                       qq!</script>\n!;
3731         }
3732
3733         print "</body>\n" .
3734               "</html>";
3735 }
3736
3737 # die_error(<http_status_code>, <error_message>[, <detailed_html_description>])
3738 # Example: die_error(404, 'Hash not found')
3739 # By convention, use the following status codes (as defined in RFC 2616):
3740 # 400: Invalid or missing CGI parameters, or
3741 #      requested object exists but has wrong type.
3742 # 403: Requested feature (like "pickaxe" or "snapshot") not enabled on
3743 #      this server or project.
3744 # 404: Requested object/revision/project doesn't exist.
3745 # 500: The server isn't configured properly, or
3746 #      an internal error occurred (e.g. failed assertions caused by bugs), or
3747 #      an unknown error occurred (e.g. the git binary died unexpectedly).
3748 # 503: The server is currently unavailable (because it is overloaded,
3749 #      or down for maintenance).  Generally, this is a temporary state.
3750 sub die_error {
3751         my $status = shift || 500;
3752         my $error = esc_html(shift) || "Internal Server Error";
3753         my $extra = shift;
3754         my %opts = @_;
3755
3756         my %http_responses = (
3757                 400 => '400 Bad Request',
3758                 403 => '403 Forbidden',
3759                 404 => '404 Not Found',
3760                 500 => '500 Internal Server Error',
3761                 503 => '503 Service Unavailable',
3762         );
3763         git_header_html($http_responses{$status}, undef, %opts);
3764         print <<EOF;
3765 <div class="page_body">
3766 <br /><br />
3767 $status - $error
3768 <br />
3769 EOF
3770         if (defined $extra) {
3771                 print "<hr />\n" .
3772                       "$extra\n";
3773         }
3774         print "</div>\n";
3775
3776         git_footer_html();
3777         goto DONE_GITWEB
3778                 unless ($opts{'-error_handler'});
3779 }
3780
3781 ## ----------------------------------------------------------------------
3782 ## functions printing or outputting HTML: navigation
3783
3784 sub git_print_page_nav {
3785         my ($current, $suppress, $head, $treehead, $treebase, $extra) = @_;
3786         $extra = '' if !defined $extra; # pager or formats
3787
3788         my @navs = qw(summary shortlog log commit commitdiff tree);
3789         if ($suppress) {
3790                 @navs = grep { $_ ne $suppress } @navs;
3791         }
3792
3793         my %arg = map { $_ => {action=>$_} } @navs;
3794         if (defined $head) {
3795                 for (qw(commit commitdiff)) {
3796                         $arg{$_}{'hash'} = $head;
3797                 }
3798                 if ($current =~ m/^(tree | log | shortlog | commit | commitdiff | search)$/x) {
3799                         for (qw(shortlog log)) {
3800                                 $arg{$_}{'hash'} = $head;
3801                         }
3802                 }
3803         }
3804
3805         $arg{'tree'}{'hash'} = $treehead if defined $treehead;
3806         $arg{'tree'}{'hash_base'} = $treebase if defined $treebase;
3807
3808         my @actions = gitweb_get_feature('actions');
3809         my %repl = (
3810                 '%' => '%',
3811                 'n' => $project,         # project name
3812                 'f' => $git_dir,         # project path within filesystem
3813                 'h' => $treehead || '',  # current hash ('h' parameter)
3814                 'b' => $treebase || '',  # hash base ('hb' parameter)
3815         );
3816         while (@actions) {
3817                 my ($label, $link, $pos) = splice(@actions,0,3);
3818                 # insert
3819                 @navs = map { $_ eq $pos ? ($_, $label) : $_ } @navs;
3820                 # munch munch
3821                 $link =~ s/%([%nfhb])/$repl{$1}/g;
3822                 $arg{$label}{'_href'} = $link;
3823         }
3824
3825         print "<div class=\"page_nav\">\n" .
3826                 (join " | ",
3827                  map { $_ eq $current ?
3828                        $_ : $cgi->a({-href => ($arg{$_}{_href} ? $arg{$_}{_href} : href(%{$arg{$_}}))}, "$_")
3829                  } @navs);
3830         print "<br/>\n$extra<br/>\n" .
3831               "</div>\n";
3832 }
3833
3834 # returns a submenu for the nagivation of the refs views (tags, heads,
3835 # remotes) with the current view disabled and the remotes view only
3836 # available if the feature is enabled
3837 sub format_ref_views {
3838         my ($current) = @_;
3839         my @ref_views = qw{tags heads};
3840         push @ref_views, 'remotes' if gitweb_check_feature('remote_heads');
3841         return join " | ", map {
3842                 $_ eq $current ? $_ :
3843                 $cgi->a({-href => href(action=>$_)}, $_)
3844         } @ref_views
3845 }
3846
3847 sub format_paging_nav {
3848         my ($action, $page, $has_next_link) = @_;
3849         my $paging_nav;
3850
3851
3852         if ($page > 0) {
3853                 $paging_nav .=
3854                         $cgi->a({-href => href(-replay=>1, page=>undef)}, "first") .
3855                         " &sdot; " .
3856                         $cgi->a({-href => href(-replay=>1, page=>$page-1),
3857                                  -accesskey => "p", -title => "Alt-p"}, "prev");
3858         } else {
3859                 $paging_nav .= "first &sdot; prev";
3860         }
3861
3862         if ($has_next_link) {
3863                 $paging_nav .= " &sdot; " .
3864                         $cgi->a({-href => href(-replay=>1, page=>$page+1),
3865                                  -accesskey => "n", -title => "Alt-n"}, "next");
3866         } else {
3867                 $paging_nav .= " &sdot; next";
3868         }
3869
3870         return $paging_nav;
3871 }
3872
3873 ## ......................................................................
3874 ## functions printing or outputting HTML: div
3875
3876 sub git_print_header_div {
3877         my ($action, $title, $hash, $hash_base) = @_;
3878         my %args = ();
3879
3880         $args{'action'} = $action;
3881         $args{'hash'} = $hash if $hash;
3882         $args{'hash_base'} = $hash_base if $hash_base;
3883
3884         print "<div class=\"header\">\n" .
3885               $cgi->a({-href => href(%args), -class => "title"},
3886               $title ? $title : $action) .
3887               "\n</div>\n";
3888 }
3889
3890 sub format_repo_url {
3891         my ($name, $url) = @_;
3892         return "<tr class=\"metadata_url\"><td>$name</td><td>$url</td></tr>\n";
3893 }
3894
3895 # Group output by placing it in a DIV element and adding a header.
3896 # Options for start_div() can be provided by passing a hash reference as the
3897 # first parameter to the function.
3898 # Options to git_print_header_div() can be provided by passing an array
3899 # reference. This must follow the options to start_div if they are present.
3900 # The content can be a scalar, which is output as-is, a scalar reference, which
3901 # is output after html escaping, an IO handle passed either as *handle or
3902 # *handle{IO}, or a function reference. In the latter case all following
3903 # parameters will be taken as argument to the content function call.
3904 sub git_print_section {
3905         my ($div_args, $header_args, $content);
3906         my $arg = shift;
3907         if (ref($arg) eq 'HASH') {
3908                 $div_args = $arg;
3909                 $arg = shift;
3910         }
3911         if (ref($arg) eq 'ARRAY') {
3912                 $header_args = $arg;
3913                 $arg = shift;
3914         }
3915         $content = $arg;
3916
3917         print $cgi->start_div($div_args);
3918         git_print_header_div(@$header_args);
3919
3920         if (ref($content) eq 'CODE') {
3921                 $content->(@_);
3922         } elsif (ref($content) eq 'SCALAR') {
3923                 print esc_html($$content);
3924         } elsif (ref($content) eq 'GLOB' or ref($content) eq 'IO::Handle') {
3925                 print <$content>;
3926         } elsif (!ref($content) && defined($content)) {
3927                 print $content;
3928         }
3929
3930         print $cgi->end_div;
3931 }
3932
3933 sub print_local_time {
3934         print format_local_time(@_);
3935 }
3936
3937 sub format_local_time {
3938         my $localtime = '';
3939         my %date = @_;
3940         if ($date{'hour_local'} < 6) {
3941                 $localtime .= sprintf(" (<span class=\"atnight\">%02d:%02d</span> %s)",
3942                         $date{'hour_local'}, $date{'minute_local'}, $date{'tz_local'});
3943         } else {
3944                 $localtime .= sprintf(" (%02d:%02d %s)",
3945                         $date{'hour_local'}, $date{'minute_local'}, $date{'tz_local'});
3946         }
3947
3948         return $localtime;
3949 }
3950
3951 # Outputs the author name and date in long form
3952 sub git_print_authorship {
3953         my $co = shift;
3954         my %opts = @_;
3955         my $tag = $opts{-tag} || 'div';
3956         my $author = $co->{'author_name'};
3957
3958         my %ad = parse_date($co->{'author_epoch'}, $co->{'author_tz'});
3959         print "<$tag class=\"author_date\">" .
3960               format_search_author($author, "author", esc_html($author)) .
3961               " [$ad{'rfc2822'}";
3962         print_local_time(%ad) if ($opts{-localtime});
3963         print "]" . git_get_avatar($co->{'author_email'}, -pad_before => 1)
3964                   . "</$tag>\n";
3965 }
3966
3967 # Outputs table rows containing the full author or committer information,
3968 # in the format expected for 'commit' view (& similar).
3969 # Parameters are a commit hash reference, followed by the list of people
3970 # to output information for. If the list is empty it defaults to both
3971 # author and committer.
3972 sub git_print_authorship_rows {
3973         my $co = shift;
3974         # too bad we can't use @people = @_ || ('author', 'committer')
3975         my @people = @_;
3976         @people = ('author', 'committer') unless @people;
3977         foreach my $who (@people) {
3978                 my %wd = parse_date($co->{"${who}_epoch"}, $co->{"${who}_tz"});
3979                 print "<tr><td>$who</td><td>" .
3980                       format_search_author($co->{"${who}_name"}, $who,
3981                                esc_html($co->{"${who}_name"})) . " " .
3982                       format_search_author($co->{"${who}_email"}, $who,
3983                                esc_html("<" . $co->{"${who}_email"} . ">")) .
3984                       "</td><td rowspan=\"2\">" .
3985                       git_get_avatar($co->{"${who}_email"}, -size => 'double') .
3986                       "</td></tr>\n" .
3987                       "<tr>" .
3988                       "<td></td><td> $wd{'rfc2822'}";
3989                 print_local_time(%wd);
3990                 print "</td>" .
3991                       "</tr>\n";
3992         }
3993 }
3994
3995 sub git_print_page_path {
3996         my $name = shift;
3997         my $type = shift;
3998         my $hb = shift;
3999
4000
4001         print "<div class=\"page_path\">";
4002         print $cgi->a({-href => href(action=>"tree", hash_base=>$hb),
4003                       -title => 'tree root'}, to_utf8("[$project]"));
4004         print " / ";
4005         if (defined $name) {
4006                 my @dirname = split '/', $name;
4007                 my $basename = pop @dirname;
4008                 my $fullname = '';
4009
4010                 foreach my $dir (@dirname) {
4011                         $fullname .= ($fullname ? '/' : '') . $dir;
4012                         print $cgi->a({-href => href(action=>"tree", file_name=>$fullname,
4013                                                      hash_base=>$hb),
4014                                       -title => $fullname}, esc_path($dir));
4015                         print " / ";
4016                 }
4017                 if (defined $type && $type eq 'blob') {
4018                         print $cgi->a({-href => href(action=>"blob_plain", file_name=>$file_name,
4019                                                      hash_base=>$hb),
4020                                       -title => $name}, esc_path($basename));
4021                 } elsif (defined $type && $type eq 'tree') {
4022                         print $cgi->a({-href => href(action=>"tree", file_name=>$file_name,
4023                                                      hash_base=>$hb),
4024                                       -title => $name}, esc_path($basename));
4025                         print " / ";
4026                 } else {
4027                         print esc_path($basename);
4028                 }
4029         }
4030         print "<br/></div>\n";
4031 }
4032
4033 sub git_print_log {
4034         my $log = shift;
4035         my %opts = @_;
4036
4037         if ($opts{'-remove_title'}) {
4038                 # remove title, i.e. first line of log
4039                 shift @$log;
4040         }
4041         # remove leading empty lines
4042         while (defined $log->[0] && $log->[0] eq "") {
4043                 shift @$log;
4044         }
4045
4046         # print log
4047         my $signoff = 0;
4048         my $empty = 0;
4049         foreach my $line (@$log) {
4050                 if ($line =~ m/^ *(signed[ \-]off[ \-]by[ :]|acked[ \-]by[ :]|cc[ :])/i) {
4051                         $signoff = 1;
4052                         $empty = 0;
4053                         if (! $opts{'-remove_signoff'}) {
4054                                 print "<span class=\"signoff\">" . esc_html($line) . "</span><br/>\n";
4055                                 next;
4056                         } else {
4057                                 # remove signoff lines
4058                                 next;
4059                         }
4060                 } else {
4061                         $signoff = 0;
4062                 }
4063
4064                 # print only one empty line
4065                 # do not print empty line after signoff
4066                 if ($line eq "") {
4067                         next if ($empty || $signoff);
4068                         $empty = 1;
4069                 } else {
4070                         $empty = 0;
4071                 }
4072
4073                 print format_log_line_html($line) . "<br/>\n";
4074         }
4075
4076         if ($opts{'-final_empty_line'}) {
4077                 # end with single empty line
4078                 print "<br/>\n" unless $empty;
4079         }
4080 }
4081
4082 # return link target (what link points to)
4083 sub git_get_link_target {
4084         my $hash = shift;
4085         my $link_target;
4086
4087         # read link
4088         open my $fd, "-|", git_cmd(), "cat-file", "blob", $hash
4089                 or return;
4090         {
4091                 local $/ = undef;
4092                 $link_target = <$fd>;
4093         }
4094         close $fd
4095                 or return;
4096
4097         return $link_target;
4098 }
4099
4100 # given link target, and the directory (basedir) the link is in,
4101 # return target of link relative to top directory (top tree);
4102 # return undef if it is not possible (including absolute links).
4103 sub normalize_link_target {
4104         my ($link_target, $basedir) = @_;
4105
4106         # absolute symlinks (beginning with '/') cannot be normalized
4107         return if (substr($link_target, 0, 1) eq '/');
4108
4109         # normalize link target to path from top (root) tree (dir)
4110         my $path;
4111         if ($basedir) {
4112                 $path = $basedir . '/' . $link_target;
4113         } else {
4114                 # we are in top (root) tree (dir)
4115                 $path = $link_target;
4116         }
4117
4118         # remove //, /./, and /../
4119         my @path_parts;
4120         foreach my $part (split('/', $path)) {
4121                 # discard '.' and ''
4122                 next if (!$part || $part eq '.');
4123                 # handle '..'
4124                 if ($part eq '..') {
4125                         if (@path_parts) {
4126                                 pop @path_parts;
4127                         } else {
4128                                 # link leads outside repository (outside top dir)
4129                                 return;
4130                         }
4131                 } else {
4132                         push @path_parts, $part;
4133                 }
4134         }
4135         $path = join('/', @path_parts);
4136
4137         return $path;
4138 }
4139
4140 # print tree entry (row of git_tree), but without encompassing <tr> element
4141 sub git_print_tree_entry {
4142         my ($t, $basedir, $hash_base, $have_blame) = @_;
4143
4144         my %base_key = ();
4145         $base_key{'hash_base'} = $hash_base if defined $hash_base;
4146
4147         # The format of a table row is: mode list link.  Where mode is
4148         # the mode of the entry, list is the name of the entry, an href,
4149         # and link is the action links of the entry.
4150
4151         print "<td class=\"mode\">" . mode_str($t->{'mode'}) . "</td>\n";
4152         if (exists $t->{'size'}) {
4153                 print "<td class=\"size\">$t->{'size'}</td>\n";
4154         }
4155         if ($t->{'type'} eq "blob") {
4156                 print "<td class=\"list\">" .
4157                         $cgi->a({-href => href(action=>"blob", hash=>$t->{'hash'},
4158                                                file_name=>"$basedir$t->{'name'}", %base_key),
4159                                 -class => "list"}, esc_path($t->{'name'}));
4160                 if (S_ISLNK(oct $t->{'mode'})) {
4161                         my $link_target = git_get_link_target($t->{'hash'});
4162                         if ($link_target) {
4163                                 my $norm_target = normalize_link_target($link_target, $basedir);
4164                                 if (defined $norm_target) {
4165                                         print " -> " .
4166                                               $cgi->a({-href => href(action=>"object", hash_base=>$hash_base,
4167                                                                      file_name=>$norm_target),
4168                                                        -title => $norm_target}, esc_path($link_target));
4169                                 } else {
4170                                         print " -> " . esc_path($link_target);
4171                                 }
4172                         }
4173                 }
4174                 print "</td>\n";
4175                 print "<td class=\"link\">";
4176                 print $cgi->a({-href => href(action=>"blob", hash=>$t->{'hash'},
4177                                              file_name=>"$basedir$t->{'name'}", %base_key)},
4178                               "blob");
4179                 if ($have_blame) {
4180                         print " | " .
4181                               $cgi->a({-href => href(action=>"blame", hash=>$t->{'hash'},
4182                                                      file_name=>"$basedir$t->{'name'}", %base_key)},
4183                                       "blame");
4184                 }
4185                 if (defined $hash_base) {
4186                         print " | " .
4187                               $cgi->a({-href => href(action=>"history", hash_base=>$hash_base,
4188                                                      hash=>$t->{'hash'}, file_name=>"$basedir$t->{'name'}")},
4189                                       "history");
4190                 }
4191                 print " | " .
4192                         $cgi->a({-href => href(action=>"blob_plain", hash_base=>$hash_base,
4193                                                file_name=>"$basedir$t->{'name'}")},
4194                                 "raw");
4195                 print "</td>\n";
4196
4197         } elsif ($t->{'type'} eq "tree") {
4198                 print "<td class=\"list\">";
4199                 print $cgi->a({-href => href(action=>"tree", hash=>$t->{'hash'},
4200                                              file_name=>"$basedir$t->{'name'}",
4201                                              %base_key)},
4202                               esc_path($t->{'name'}));
4203                 print "</td>\n";
4204                 print "<td class=\"link\">";
4205                 print $cgi->a({-href => href(action=>"tree", hash=>$t->{'hash'},
4206                                              file_name=>"$basedir$t->{'name'}",
4207                                              %base_key)},
4208                               "tree");
4209                 if (defined $hash_base) {
4210                         print " | " .
4211                               $cgi->a({-href => href(action=>"history", hash_base=>$hash_base,
4212                                                      file_name=>"$basedir$t->{'name'}")},
4213                                       "history");
4214                 }
4215                 print "</td>\n";
4216         } else {
4217                 # unknown object: we can only present history for it
4218                 # (this includes 'commit' object, i.e. submodule support)
4219                 print "<td class=\"list\">" .
4220                       esc_path($t->{'name'}) .
4221                       "</td>\n";
4222                 print "<td class=\"link\">";
4223                 if (defined $hash_base) {
4224                         print $cgi->a({-href => href(action=>"history",
4225                                                      hash_base=>$hash_base,
4226                                                      file_name=>"$basedir$t->{'name'}")},
4227                                       "history");
4228                 }
4229                 print "</td>\n";
4230         }
4231 }
4232
4233 ## ......................................................................
4234 ## functions printing large fragments of HTML
4235
4236 # get pre-image filenames for merge (combined) diff
4237 sub fill_from_file_info {
4238         my ($diff, @parents) = @_;
4239
4240         $diff->{'from_file'} = [ ];
4241         $diff->{'from_file'}[$diff->{'nparents'} - 1] = undef;
4242         for (my $i = 0; $i < $diff->{'nparents'}; $i++) {
4243                 if ($diff->{'status'}[$i] eq 'R' ||
4244                     $diff->{'status'}[$i] eq 'C') {
4245                         $diff->{'from_file'}[$i] =
4246                                 git_get_path_by_hash($parents[$i], $diff->{'from_id'}[$i]);
4247                 }
4248         }
4249
4250         return $diff;
4251 }
4252
4253 # is current raw difftree line of file deletion
4254 sub is_deleted {
4255         my $diffinfo = shift;
4256
4257         return $diffinfo->{'to_id'} eq ('0' x 40);
4258 }
4259
4260 # does patch correspond to [previous] difftree raw line
4261 # $diffinfo  - hashref of parsed raw diff format
4262 # $patchinfo - hashref of parsed patch diff format
4263 #              (the same keys as in $diffinfo)
4264 sub is_patch_split {
4265         my ($diffinfo, $patchinfo) = @_;
4266
4267         return defined $diffinfo && defined $patchinfo
4268                 && $diffinfo->{'to_file'} eq $patchinfo->{'to_file'};
4269 }
4270
4271
4272 sub git_difftree_body {
4273         my ($difftree, $hash, @parents) = @_;
4274         my ($parent) = $parents[0];
4275         my $have_blame = gitweb_check_feature('blame');
4276         print "<div class=\"list_head\">\n";
4277         if ($#{$difftree} > 10) {
4278                 print(($#{$difftree} + 1) . " files changed:\n");
4279         }
4280         print "</div>\n";
4281
4282         print "<table class=\"" .
4283               (@parents > 1 ? "combined " : "") .
4284               "diff_tree\">\n";
4285
4286         # header only for combined diff in 'commitdiff' view
4287         my $has_header = @$difftree && @parents > 1 && $action eq 'commitdiff';
4288         if ($has_header) {
4289                 # table header
4290                 print "<thead><tr>\n" .
4291                        "<th></th><th></th>\n"; # filename, patchN link
4292                 for (my $i = 0; $i < @parents; $i++) {
4293                         my $par = $parents[$i];
4294                         print "<th>" .
4295                               $cgi->a({-href => href(action=>"commitdiff",
4296                                                      hash=>$hash, hash_parent=>$par),
4297                                        -title => 'commitdiff to parent number ' .
4298                                                   ($i+1) . ': ' . substr($par,0,7)},
4299                                       $i+1) .
4300                               "&nbsp;</th>\n";
4301                 }
4302                 print "</tr></thead>\n<tbody>\n";
4303         }
4304
4305         my $alternate = 1;
4306         my $patchno = 0;
4307         foreach my $line (@{$difftree}) {
4308                 my $diff = parsed_difftree_line($line);
4309
4310                 if ($alternate) {
4311                         print "<tr class=\"dark\">\n";
4312                 } else {
4313                         print "<tr class=\"light\">\n";
4314                 }
4315                 $alternate ^= 1;
4316
4317                 if (exists $diff->{'nparents'}) { # combined diff
4318
4319                         fill_from_file_info($diff, @parents)
4320                                 unless exists $diff->{'from_file'};
4321
4322                         if (!is_deleted($diff)) {
4323                                 # file exists in the result (child) commit
4324                                 print "<td>" .
4325                                       $cgi->a({-href => href(action=>"blob", hash=>$diff->{'to_id'},
4326                                                              file_name=>$diff->{'to_file'},
4327                                                              hash_base=>$hash),
4328                                               -class => "list"}, esc_path($diff->{'to_file'})) .
4329                                       "</td>\n";
4330                         } else {
4331                                 print "<td>" .
4332                                       esc_path($diff->{'to_file'}) .
4333                                       "</td>\n";
4334                         }
4335
4336                         if ($action eq 'commitdiff') {
4337                                 # link to patch
4338                                 $patchno++;
4339                                 print "<td class=\"link\">" .
4340                                       $cgi->a({-href => "#patch$patchno"}, "patch") .
4341                                       " | " .
4342                                       "</td>\n";
4343                         }
4344
4345                         my $has_history = 0;
4346                         my $not_deleted = 0;
4347                         for (my $i = 0; $i < $diff->{'nparents'}; $i++) {
4348                                 my $hash_parent = $parents[$i];
4349                                 my $from_hash = $diff->{'from_id'}[$i];
4350                                 my $from_path = $diff->{'from_file'}[$i];
4351                                 my $status = $diff->{'status'}[$i];
4352
4353                                 $has_history ||= ($status ne 'A');
4354                                 $not_deleted ||= ($status ne 'D');
4355
4356                                 if ($status eq 'A') {
4357                                         print "<td  class=\"link\" align=\"right\"> | </td>\n";
4358                                 } elsif ($status eq 'D') {
4359                                         print "<td class=\"link\">" .
4360                                               $cgi->a({-href => href(action=>"blob",
4361                                                                      hash_base=>$hash,
4362                                                                      hash=>$from_hash,
4363                                                                      file_name=>$from_path)},
4364                                                       "blob" . ($i+1)) .
4365                                               " | </td>\n";
4366                                 } else {
4367                                         if ($diff->{'to_id'} eq $from_hash) {
4368                                                 print "<td class=\"link nochange\">";
4369                                         } else {
4370                                                 print "<td class=\"link\">";
4371                                         }
4372                                         print $cgi->a({-href => href(action=>"blobdiff",
4373                                                                      hash=>$diff->{'to_id'},
4374                                                                      hash_parent=>$from_hash,
4375                                                                      hash_base=>$hash,
4376                                                                      hash_parent_base=>$hash_parent,
4377                                                                      file_name=>$diff->{'to_file'},
4378                                                                      file_parent=>$from_path)},
4379                                                       "diff" . ($i+1)) .
4380                                               " | </td>\n";
4381                                 }
4382                         }
4383
4384                         print "<td class=\"link\">";
4385                         if ($not_deleted) {
4386                                 print $cgi->a({-href => href(action=>"blob",
4387                                                              hash=>$diff->{'to_id'},
4388                                                              file_name=>$diff->{'to_file'},
4389                                                              hash_base=>$hash)},
4390                                               "blob");
4391                                 print " | " if ($has_history);
4392                         }
4393                         if ($has_history) {
4394                                 print $cgi->a({-href => href(action=>"history",
4395                                                              file_name=>$diff->{'to_file'},
4396                                                              hash_base=>$hash)},
4397                                               "history");
4398                         }
4399                         print "</td>\n";
4400
4401                         print "</tr>\n";
4402                         next; # instead of 'else' clause, to avoid extra indent
4403                 }
4404                 # else ordinary diff
4405
4406                 my ($to_mode_oct, $to_mode_str, $to_file_type);
4407                 my ($from_mode_oct, $from_mode_str, $from_file_type);
4408                 if ($diff->{'to_mode'} ne ('0' x 6)) {
4409                         $to_mode_oct = oct $diff->{'to_mode'};
4410                         if (S_ISREG($to_mode_oct)) { # only for regular file
4411                                 $to_mode_str = sprintf("%04o", $to_mode_oct & 0777); # permission bits
4412                         }
4413                         $to_file_type = file_type($diff->{'to_mode'});
4414                 }
4415                 if ($diff->{'from_mode'} ne ('0' x 6)) {
4416                         $from_mode_oct = oct $diff->{'from_mode'};
4417                         if (S_ISREG($from_mode_oct)) { # only for regular file
4418                                 $from_mode_str = sprintf("%04o", $from_mode_oct & 0777); # permission bits
4419                         }
4420                         $from_file_type = file_type($diff->{'from_mode'});
4421                 }
4422
4423                 if ($diff->{'status'} eq "A") { # created
4424                         my $mode_chng = "<span class=\"file_status new\">[new $to_file_type";
4425                         $mode_chng   .= " with mode: $to_mode_str" if $to_mode_str;
4426                         $mode_chng   .= "]</span>";
4427                         print "<td>";
4428                         print $cgi->a({-href => href(action=>"blob", hash=>$diff->{'to_id'},
4429                                                      hash_base=>$hash, file_name=>$diff->{'file'}),
4430                                       -class => "list"}, esc_path($diff->{'file'}));
4431                         print "</td>\n";
4432                         print "<td>$mode_chng</td>\n";
4433                         print "<td class=\"link\">";
4434                         if ($action eq 'commitdiff') {
4435                                 # link to patch
4436                                 $patchno++;
4437                                 print $cgi->a({-href => "#patch$patchno"}, "patch");
4438                                 print " | ";
4439                         }
4440                         print $cgi->a({-href => href(action=>"blob", hash=>$diff->{'to_id'},
4441                                                      hash_base=>$hash, file_name=>$diff->{'file'})},
4442                                       "blob");
4443                         print "</td>\n";
4444
4445                 } elsif ($diff->{'status'} eq "D") { # deleted
4446                         my $mode_chng = "<span class=\"file_status deleted\">[deleted $from_file_type]</span>";
4447                         print "<td>";
4448                         print $cgi->a({-href => href(action=>"blob", hash=>$diff->{'from_id'},
4449                                                      hash_base=>$parent, file_name=>$diff->{'file'}),
4450                                        -class => "list"}, esc_path($diff->{'file'}));
4451                         print "</td>\n";
4452                         print "<td>$mode_chng</td>\n";
4453                         print "<td class=\"link\">";
4454                         if ($action eq 'commitdiff') {
4455                                 # link to patch
4456                                 $patchno++;
4457                                 print $cgi->a({-href => "#patch$patchno"}, "patch");
4458                                 print " | ";
4459                         }
4460                         print $cgi->a({-href => href(action=>"blob", hash=>$diff->{'from_id'},
4461                                                      hash_base=>$parent, file_name=>$diff->{'file'})},
4462                                       "blob") . " | ";
4463                         if ($have_blame) {
4464                                 print $cgi->a({-href => href(action=>"blame", hash_base=>$parent,
4465                                                              file_name=>$diff->{'file'})},
4466                                               "blame") . " | ";
4467                         }
4468                         print $cgi->a({-href => href(action=>"history", hash_base=>$parent,
4469                                                      file_name=>$diff->{'file'})},
4470                                       "history");
4471                         print "</td>\n";
4472
4473                 } elsif ($diff->{'status'} eq "M" || $diff->{'status'} eq "T") { # modified, or type changed
4474                         my $mode_chnge = "";
4475                         if ($diff->{'from_mode'} != $diff->{'to_mode'}) {
4476                                 $mode_chnge = "<span class=\"file_status mode_chnge\">[changed";
4477                                 if ($from_file_type ne $to_file_type) {
4478                                         $mode_chnge .= " from $from_file_type to $to_file_type";
4479                                 }
4480                                 if (($from_mode_oct & 0777) != ($to_mode_oct & 0777)) {
4481                                         if ($from_mode_str && $to_mode_str) {
4482                                                 $mode_chnge .= " mode: $from_mode_str->$to_mode_str";
4483                                         } elsif ($to_mode_str) {
4484                                                 $mode_chnge .= " mode: $to_mode_str";
4485                                         }
4486                                 }
4487                                 $mode_chnge .= "]</span>\n";
4488                         }
4489                         print "<td>";
4490                         print $cgi->a({-href => href(action=>"blob", hash=>$diff->{'to_id'},
4491                                                      hash_base=>$hash, file_name=>$diff->{'file'}),
4492                                       -class => "list"}, esc_path($diff->{'file'}));
4493                         print "</td>\n";
4494                         print "<td>$mode_chnge</td>\n";
4495                         print "<td class=\"link\">";
4496                         if ($action eq 'commitdiff') {
4497                                 # link to patch
4498                                 $patchno++;
4499                                 print $cgi->a({-href => "#patch$patchno"}, "patch") .
4500                                       " | ";
4501                         } elsif ($diff->{'to_id'} ne $diff->{'from_id'}) {
4502                                 # "commit" view and modified file (not onlu mode changed)
4503                                 print $cgi->a({-href => href(action=>"blobdiff",
4504                                                              hash=>$diff->{'to_id'}, hash_parent=>$diff->{'from_id'},
4505                                                              hash_base=>$hash, hash_parent_base=>$parent,
4506                                                              file_name=>$diff->{'file'})},
4507                                               "diff") .
4508                                       " | ";
4509                         }
4510                         print $cgi->a({-href => href(action=>"blob", hash=>$diff->{'to_id'},
4511                                                      hash_base=>$hash, file_name=>$diff->{'file'})},
4512                                        "blob") . " | ";
4513                         if ($have_blame) {
4514                                 print $cgi->a({-href => href(action=>"blame", hash_base=>$hash,
4515                                                              file_name=>$diff->{'file'})},
4516                                               "blame") . " | ";
4517                         }
4518                         print $cgi->a({-href => href(action=>"history", hash_base=>$hash,
4519                                                      file_name=>$diff->{'file'})},
4520                                       "history");
4521                         print "</td>\n";
4522
4523                 } elsif ($diff->{'status'} eq "R" || $diff->{'status'} eq "C") { # renamed or copied
4524                         my %status_name = ('R' => 'moved', 'C' => 'copied');
4525                         my $nstatus = $status_name{$diff->{'status'}};
4526                         my $mode_chng = "";
4527                         if ($diff->{'from_mode'} != $diff->{'to_mode'}) {
4528                                 # mode also for directories, so we cannot use $to_mode_str
4529                                 $mode_chng = sprintf(", mode: %04o", $to_mode_oct & 0777);
4530                         }
4531                         print "<td>" .
4532                               $cgi->a({-href => href(action=>"blob", hash_base=>$hash,
4533                                                      hash=>$diff->{'to_id'}, file_name=>$diff->{'to_file'}),
4534                                       -class => "list"}, esc_path($diff->{'to_file'})) . "</td>\n" .
4535                               "<td><span class=\"file_status $nstatus\">[$nstatus from " .
4536                               $cgi->a({-href => href(action=>"blob", hash_base=>$parent,
4537                                                      hash=>$diff->{'from_id'}, file_name=>$diff->{'from_file'}),
4538                                       -class => "list"}, esc_path($diff->{'from_file'})) .
4539                               " with " . (int $diff->{'similarity'}) . "% similarity$mode_chng]</span></td>\n" .
4540                               "<td class=\"link\">";
4541                         if ($action eq 'commitdiff') {
4542                                 # link to patch
4543                                 $patchno++;
4544                                 print $cgi->a({-href => "#patch$patchno"}, "patch") .
4545                                       " | ";
4546                         } elsif ($diff->{'to_id'} ne $diff->{'from_id'}) {
4547                                 # "commit" view and modified file (not only pure rename or copy)
4548                                 print $cgi->a({-href => href(action=>"blobdiff",
4549                                                              hash=>$diff->{'to_id'}, hash_parent=>$diff->{'from_id'},
4550                                                              hash_base=>$hash, hash_parent_base=>$parent,
4551                                                              file_name=>$diff->{'to_file'}, file_parent=>$diff->{'from_file'})},
4552                                               "diff") .
4553                                       " | ";
4554                         }
4555                         print $cgi->a({-href => href(action=>"blob", hash=>$diff->{'to_id'},
4556                                                      hash_base=>$parent, file_name=>$diff->{'to_file'})},
4557                                       "blob") . " | ";
4558                         if ($have_blame) {
4559                                 print $cgi->a({-href => href(action=>"blame", hash_base=>$hash,
4560                                                              file_name=>$diff->{'to_file'})},
4561                                               "blame") . " | ";
4562                         }
4563                         print $cgi->a({-href => href(action=>"history", hash_base=>$hash,
4564                                                     file_name=>$diff->{'to_file'})},
4565                                       "history");
4566                         print "</td>\n";
4567
4568                 } # we should not encounter Unmerged (U) or Unknown (X) status
4569                 print "</tr>\n";
4570         }
4571         print "</tbody>" if $has_header;
4572         print "</table>\n";
4573 }
4574
4575 sub git_patchset_body {
4576         my ($fd, $difftree, $hash, @hash_parents) = @_;
4577         my ($hash_parent) = $hash_parents[0];
4578
4579         my $is_combined = (@hash_parents > 1);
4580         my $patch_idx = 0;
4581         my $patch_number = 0;
4582         my $patch_line;
4583         my $diffinfo;
4584         my $to_name;
4585         my (%from, %to);
4586
4587         print "<div class=\"patchset\">\n";
4588
4589         # skip to first patch
4590         while ($patch_line = <$fd>) {
4591                 chomp $patch_line;
4592
4593                 last if ($patch_line =~ m/^diff /);
4594         }
4595
4596  PATCH:
4597         while ($patch_line) {
4598
4599                 # parse "git diff" header line
4600                 if ($patch_line =~ m/^diff --git (\"(?:[^\\\"]*(?:\\.[^\\\"]*)*)\"|[^ "]*) (.*)$/) {
4601                         # $1 is from_name, which we do not use
4602                         $to_name = unquote($2);
4603                         $to_name =~ s!^b/!!;
4604                 } elsif ($patch_line =~ m/^diff --(cc|combined) ("?.*"?)$/) {
4605                         # $1 is 'cc' or 'combined', which we do not use
4606                         $to_name = unquote($2);
4607                 } else {
4608                         $to_name = undef;
4609                 }
4610
4611                 # check if current patch belong to current raw line
4612                 # and parse raw git-diff line if needed
4613                 if (is_patch_split($diffinfo, { 'to_file' => $to_name })) {
4614                         # this is continuation of a split patch
4615                         print "<div class=\"patch cont\">\n";
4616                 } else {
4617                         # advance raw git-diff output if needed
4618                         $patch_idx++ if defined $diffinfo;
4619
4620                         # read and prepare patch information
4621                         $diffinfo = parsed_difftree_line($difftree->[$patch_idx]);
4622
4623                         # compact combined diff output can have some patches skipped
4624                         # find which patch (using pathname of result) we are at now;
4625                         if ($is_combined) {
4626                                 while ($to_name ne $diffinfo->{'to_file'}) {
4627                                         print "<div class=\"patch\" id=\"patch". ($patch_idx+1) ."\">\n" .
4628                                               format_diff_cc_simplified($diffinfo, @hash_parents) .
4629                                               "</div>\n";  # class="patch"
4630
4631                                         $patch_idx++;
4632                                         $patch_number++;
4633
4634                                         last if $patch_idx > $#$difftree;
4635                                         $diffinfo = parsed_difftree_line($difftree->[$patch_idx]);
4636                                 }
4637                         }
4638
4639                         # modifies %from, %to hashes
4640                         parse_from_to_diffinfo($diffinfo, \%from, \%to, @hash_parents);
4641
4642                         # this is first patch for raw difftree line with $patch_idx index
4643                         # we index @$difftree array from 0, but number patches from 1
4644                         print "<div class=\"patch\" id=\"patch". ($patch_idx+1) ."\">\n";
4645                 }
4646
4647                 # git diff header
4648                 #assert($patch_line =~ m/^diff /) if DEBUG;
4649                 #assert($patch_line !~ m!$/$!) if DEBUG; # is chomp-ed
4650                 $patch_number++;
4651                 # print "git diff" header
4652                 print format_git_diff_header_line($patch_line, $diffinfo,
4653                                                   \%from, \%to);
4654
4655                 # print extended diff header
4656                 print "<div class=\"diff extended_header\">\n";
4657         EXTENDED_HEADER:
4658                 while ($patch_line = <$fd>) {
4659                         chomp $patch_line;
4660
4661                         last EXTENDED_HEADER if ($patch_line =~ m/^--- |^diff /);
4662
4663                         print format_extended_diff_header_line($patch_line, $diffinfo,
4664                                                                \%from, \%to);
4665                 }
4666                 print "</div>\n"; # class="diff extended_header"
4667
4668                 # from-file/to-file diff header
4669                 if (! $patch_line) {
4670                         print "</div>\n"; # class="patch"
4671                         last PATCH;
4672                 }
4673                 next PATCH if ($patch_line =~ m/^diff /);
4674                 #assert($patch_line =~ m/^---/) if DEBUG;
4675
4676                 my $last_patch_line = $patch_line;
4677                 $patch_line = <$fd>;
4678                 chomp $patch_line;
4679                 #assert($patch_line =~ m/^\+\+\+/) if DEBUG;
4680
4681                 print format_diff_from_to_header($last_patch_line, $patch_line,
4682                                                  $diffinfo, \%from, \%to,
4683                                                  @hash_parents);
4684
4685                 # the patch itself
4686         LINE:
4687                 while ($patch_line = <$fd>) {
4688                         chomp $patch_line;
4689
4690                         next PATCH if ($patch_line =~ m/^diff /);
4691
4692                         print format_diff_line($patch_line, \%from, \%to);
4693                 }
4694
4695         } continue {
4696                 print "</div>\n"; # class="patch"
4697         }
4698
4699         # for compact combined (--cc) format, with chunk and patch simplification
4700         # the patchset might be empty, but there might be unprocessed raw lines
4701         for (++$patch_idx if $patch_number > 0;
4702              $patch_idx < @$difftree;
4703              ++$patch_idx) {
4704                 # read and prepare patch information
4705                 $diffinfo = parsed_difftree_line($difftree->[$patch_idx]);
4706
4707                 # generate anchor for "patch" links in difftree / whatchanged part
4708                 print "<div class=\"patch\" id=\"patch". ($patch_idx+1) ."\">\n" .
4709                       format_diff_cc_simplified($diffinfo, @hash_parents) .
4710                       "</div>\n";  # class="patch"
4711
4712                 $patch_number++;
4713         }
4714
4715         if ($patch_number == 0) {
4716                 if (@hash_parents > 1) {
4717                         print "<div class=\"diff nodifferences\">Trivial merge</div>\n";
4718                 } else {
4719                         print "<div class=\"diff nodifferences\">No differences found</div>\n";
4720                 }
4721         }
4722
4723         print "</div>\n"; # class="patchset"
4724 }
4725
4726 # . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
4727
4728 # fills project list info (age, description, owner, forks) for each
4729 # project in the list, removing invalid projects from returned list
4730 # NOTE: modifies $projlist, but does not remove entries from it
4731 sub fill_project_list_info {
4732         my ($projlist, $check_forks) = @_;
4733         my @projects;
4734
4735         my $show_ctags = gitweb_check_feature('ctags');
4736  PROJECT:
4737         foreach my $pr (@$projlist) {
4738                 my (@activity) = git_get_last_activity($pr->{'path'});
4739                 unless (@activity) {
4740                         next PROJECT;
4741                 }
4742                 ($pr->{'age'}, $pr->{'age_string'}) = @activity;
4743                 if (!defined $pr->{'descr'}) {
4744                         my $descr = git_get_project_description($pr->{'path'}) || "";
4745                         $descr = to_utf8($descr);
4746                         $pr->{'descr_long'} = $descr;
4747                         $pr->{'descr'} = chop_str($descr, $projects_list_description_width, 5);
4748                 }
4749                 if (!defined $pr->{'owner'}) {
4750                         $pr->{'owner'} = git_get_project_owner("$pr->{'path'}") || "";
4751                 }
4752                 if ($check_forks) {
4753                         my $pname = $pr->{'path'};
4754                         if (($pname =~ s/\.git$//) &&
4755                             ($pname !~ /\/$/) &&
4756                             (-d "$projectroot/$pname")) {
4757                                 $pr->{'forks'} = "-d $projectroot/$pname";
4758                         } else {
4759                                 $pr->{'forks'} = 0;
4760                         }
4761                 }
4762                 $show_ctags and $pr->{'ctags'} = git_get_project_ctags($pr->{'path'});
4763                 push @projects, $pr;
4764         }
4765
4766         return @projects;
4767 }
4768
4769 # print 'sort by' <th> element, generating 'sort by $name' replay link
4770 # if that order is not selected
4771 sub print_sort_th {
4772         print format_sort_th(@_);
4773 }
4774
4775 sub format_sort_th {
4776         my ($name, $order, $header) = @_;
4777         my $sort_th = "";
4778         $header ||= ucfirst($name);
4779
4780         if ($order eq $name) {
4781                 $sort_th .= "<th>$header</th>\n";
4782         } else {
4783                 $sort_th .= "<th>" .
4784                             $cgi->a({-href => href(-replay=>1, order=>$name),
4785                                      -class => "header"}, $header) .
4786                             "</th>\n";
4787         }
4788
4789         return $sort_th;
4790 }
4791
4792 sub git_project_list_body {
4793         # actually uses global variable $project
4794         my ($projlist, $order, $from, $to, $extra, $no_header) = @_;
4795
4796         my $check_forks = gitweb_check_feature('forks');
4797         my @projects = fill_project_list_info($projlist, $check_forks);
4798
4799         $order ||= $default_projects_order;
4800         $from = 0 unless defined $from;
4801         $to = $#projects if (!defined $to || $#projects < $to);
4802
4803         my %order_info = (
4804                 project => { key => 'path', type => 'str' },
4805                 descr => { key => 'descr_long', type => 'str' },
4806                 owner => { key => 'owner', type => 'str' },
4807                 age => { key => 'age', type => 'num' }
4808         );
4809         my $oi = $order_info{$order};
4810         if ($oi->{'type'} eq 'str') {
4811                 @projects = sort {$a->{$oi->{'key'}} cmp $b->{$oi->{'key'}}} @projects;
4812         } else {
4813                 @projects = sort {$a->{$oi->{'key'}} <=> $b->{$oi->{'key'}}} @projects;
4814         }
4815
4816         my $show_ctags = gitweb_check_feature('ctags');
4817         if ($show_ctags) {
4818                 my %ctags;
4819                 foreach my $p (@projects) {
4820                         foreach my $ct (keys %{$p->{'ctags'}}) {
4821                                 $ctags{$ct} += $p->{'ctags'}->{$ct};
4822                         }
4823                 }
4824                 my $cloud = git_populate_project_tagcloud(\%ctags);
4825                 print git_show_project_tagcloud($cloud, 64);
4826         }
4827
4828         print "<table class=\"project_list\">\n";
4829         unless ($no_header) {
4830                 print "<tr>\n";
4831                 if ($check_forks) {
4832                         print "<th></th>\n";
4833                 }
4834                 print_sort_th('project', $order, 'Project');
4835                 print_sort_th('descr', $order, 'Description');
4836                 print_sort_th('owner', $order, 'Owner');
4837                 print_sort_th('age', $order, 'Last Change');
4838                 print "<th></th>\n" . # for links
4839                       "</tr>\n";
4840         }
4841         my $alternate = 1;
4842         my $tagfilter = $cgi->param('by_tag');
4843         for (my $i = $from; $i <= $to; $i++) {
4844                 my $pr = $projects[$i];
4845
4846                 next if $tagfilter and $show_ctags and not grep { lc $_ eq lc $tagfilter } keys %{$pr->{'ctags'}};
4847                 next if $searchtext and not $pr->{'path'} =~ /$searchtext/
4848                         and not $pr->{'descr_long'} =~ /$searchtext/;
4849                 # Weed out forks or non-matching entries of search
4850                 if ($check_forks) {
4851                         my $forkbase = $project; $forkbase ||= ''; $forkbase =~ s#\.git$#/#;
4852                         $forkbase="^$forkbase" if $forkbase;
4853                         next if not $searchtext and not $tagfilter and $show_ctags
4854                                 and $pr->{'path'} =~ m#$forkbase.*/.*#; # regexp-safe
4855                 }
4856
4857                 if ($alternate) {
4858                         print "<tr class=\"dark\">\n";
4859                 } else {
4860                         print "<tr class=\"light\">\n";
4861                 }
4862                 $alternate ^= 1;
4863                 if ($check_forks) {
4864                         print "<td>";
4865                         if ($pr->{'forks'}) {
4866                                 print "<!-- $pr->{'forks'} -->\n";
4867                                 print $cgi->a({-href => href(project=>$pr->{'path'}, action=>"forks")}, "+");
4868                         }
4869                         print "</td>\n";
4870                 }
4871                 print "<td>" . $cgi->a({-href => href(project=>$pr->{'path'}, action=>"summary"),
4872                                         -class => "list"}, esc_html($pr->{'path'})) . "</td>\n" .
4873                       "<td>" . $cgi->a({-href => href(project=>$pr->{'path'}, action=>"summary"),
4874                                         -class => "list", -title => $pr->{'descr_long'}},
4875                                         esc_html($pr->{'descr'})) . "</td>\n" .
4876                       "<td><i>" . chop_and_escape_str($pr->{'owner'}, 15) . "</i></td>\n";
4877                 print "<td class=\"". age_class($pr->{'age'}) . "\">" .
4878                       (defined $pr->{'age_string'} ? $pr->{'age_string'} : "No commits") . "</td>\n" .
4879                       "<td class=\"link\">" .
4880                       $cgi->a({-href => href(project=>$pr->{'path'}, action=>"summary")}, "summary")   . " | " .
4881                       $cgi->a({-href => href(project=>$pr->{'path'}, action=>"shortlog")}, "shortlog") . " | " .
4882                       $cgi->a({-href => href(project=>$pr->{'path'}, action=>"log")}, "log") . " | " .
4883                       $cgi->a({-href => href(project=>$pr->{'path'}, action=>"tree")}, "tree") .
4884                       ($pr->{'forks'} ? " | " . $cgi->a({-href => href(project=>$pr->{'path'}, action=>"forks")}, "forks") : '') .
4885                       "</td>\n" .
4886                       "</tr>\n";
4887         }
4888         if (defined $extra) {
4889                 print "<tr>\n";
4890                 if ($check_forks) {
4891                         print "<td></td>\n";
4892                 }
4893                 print "<td colspan=\"5\">$extra</td>\n" .
4894                       "</tr>\n";
4895         }
4896         print "</table>\n";
4897 }
4898
4899 sub git_log_body {
4900         # uses global variable $project
4901         my ($commitlist, $from, $to, $refs, $extra) = @_;
4902
4903         $from = 0 unless defined $from;
4904         $to = $#{$commitlist} if (!defined $to || $#{$commitlist} < $to);
4905
4906         for (my $i = 0; $i <= $to; $i++) {
4907                 my %co = %{$commitlist->[$i]};
4908                 next if !%co;
4909                 my $commit = $co{'id'};
4910                 my $ref = format_ref_marker($refs, $commit);
4911                 git_print_header_div('commit',
4912                                "<span class=\"age\">$co{'age_string'}</span>" .
4913                                esc_html($co{'title'}) . $ref,
4914                                $commit);
4915                 print "<div class=\"title_text\">\n" .
4916                       "<div class=\"log_link\">\n" .
4917                       $cgi->a({-href => href(action=>"commit", hash=>$commit)}, "commit") .
4918                       " | " .
4919                       $cgi->a({-href => href(action=>"commitdiff", hash=>$commit)}, "commitdiff") .
4920                       " | " .
4921                       $cgi->a({-href => href(action=>"tree", hash=>$commit, hash_base=>$commit)}, "tree") .
4922                       "<br/>\n" .
4923                       "</div>\n";
4924                       git_print_authorship(\%co, -tag => 'span');
4925                       print "<br/>\n</div>\n";
4926
4927                 print "<div class=\"log_body\">\n";
4928                 git_print_log($co{'comment'}, -final_empty_line=> 1);
4929                 print "</div>\n";
4930         }
4931         if ($extra) {
4932                 print "<div class=\"page_nav\">\n";
4933                 print "$extra\n";
4934                 print "</div>\n";
4935         }
4936 }
4937
4938 sub git_shortlog_body {
4939         # uses global variable $project
4940         my ($commitlist, $from, $to, $refs, $extra) = @_;
4941
4942         $from = 0 unless defined $from;
4943         $to = $#{$commitlist} if (!defined $to || $#{$commitlist} < $to);
4944
4945         print "<table class=\"shortlog\">\n";
4946         my $alternate = 1;
4947         for (my $i = $from; $i <= $to; $i++) {
4948                 my %co = %{$commitlist->[$i]};
4949                 my $commit = $co{'id'};
4950                 my $ref = format_ref_marker($refs, $commit);
4951                 if ($alternate) {
4952                         print "<tr class=\"dark\">\n";
4953                 } else {
4954                         print "<tr class=\"light\">\n";
4955                 }
4956                 $alternate ^= 1;
4957                 # git_summary() used print "<td><i>$co{'age_string'}</i></td>\n" .
4958                 print "<td title=\"$co{'age_string_age'}\"><i>$co{'age_string_date'}</i></td>\n" .
4959                       format_author_html('td', \%co, 10) . "<td>";
4960                 print format_subject_html($co{'title'}, $co{'title_short'},
4961                                           href(action=>"commit", hash=>$commit), $ref);
4962                 print "</td>\n" .
4963                       "<td class=\"link\">" .
4964                       $cgi->a({-href => href(action=>"commit", hash=>$commit)}, "commit") . " | " .
4965                       $cgi->a({-href => href(action=>"commitdiff", hash=>$commit)}, "commitdiff") . " | " .
4966                       $cgi->a({-href => href(action=>"tree", hash=>$commit, hash_base=>$commit)}, "tree");
4967                 my $snapshot_links = format_snapshot_links($commit);
4968                 if (defined $snapshot_links) {
4969                         print " | " . $snapshot_links;
4970                 }
4971                 print "</td>\n" .
4972                       "</tr>\n";
4973         }
4974         if (defined $extra) {
4975                 print "<tr>\n" .
4976                       "<td colspan=\"4\">$extra</td>\n" .
4977                       "</tr>\n";
4978         }
4979         print "</table>\n";
4980 }
4981
4982 sub git_history_body {
4983         # Warning: assumes constant type (blob or tree) during history
4984         my ($commitlist, $from, $to, $refs, $extra,
4985             $file_name, $file_hash, $ftype) = @_;
4986
4987         $from = 0 unless defined $from;
4988         $to = $#{$commitlist} unless (defined $to && $to <= $#{$commitlist});
4989
4990         print "<table class=\"history\">\n";
4991         my $alternate = 1;
4992         for (my $i = $from; $i <= $to; $i++) {
4993                 my %co = %{$commitlist->[$i]};
4994                 if (!%co) {
4995                         next;
4996                 }
4997                 my $commit = $co{'id'};
4998
4999                 my $ref = format_ref_marker($refs, $commit);
5000
5001                 if ($alternate) {
5002                         print "<tr class=\"dark\">\n";
5003                 } else {
5004                         print "<tr class=\"light\">\n";
5005                 }
5006                 $alternate ^= 1;
5007                 print "<td title=\"$co{'age_string_age'}\"><i>$co{'age_string_date'}</i></td>\n" .
5008         # shortlog:   format_author_html('td', \%co, 10)
5009                       format_author_html('td', \%co, 15, 3) . "<td>";
5010                 # originally git_history used chop_str($co{'title'}, 50)
5011                 print format_subject_html($co{'title'}, $co{'title_short'},
5012                                           href(action=>"commit", hash=>$commit), $ref);
5013                 print "</td>\n" .
5014                       "<td class=\"link\">" .
5015                       $cgi->a({-href => href(action=>$ftype, hash_base=>$commit, file_name=>$file_name)}, $ftype) . " | " .
5016                       $cgi->a({-href => href(action=>"commitdiff", hash=>$commit)}, "commitdiff");
5017
5018                 if ($ftype eq 'blob') {
5019                         my $blob_current = $file_hash;
5020                         my $blob_parent  = git_get_hash_by_path($commit, $file_name);
5021                         if (defined $blob_current && defined $blob_parent &&
5022                                         $blob_current ne $blob_parent) {
5023                                 print " | " .
5024                                         $cgi->a({-href => href(action=>"blobdiff",
5025                                                                hash=>$blob_current, hash_parent=>$blob_parent,
5026                                                                hash_base=>$hash_base, hash_parent_base=>$commit,
5027                                                                file_name=>$file_name)},
5028                                                 "diff to current");
5029                         }
5030                 }
5031                 print "</td>\n" .
5032                       "</tr>\n";
5033         }
5034         if (defined $extra) {
5035                 print "<tr>\n" .
5036                       "<td colspan=\"4\">$extra</td>\n" .
5037                       "</tr>\n";
5038         }
5039         print "</table>\n";
5040 }
5041
5042 sub git_tags_body {
5043         # uses global variable $project
5044         my ($taglist, $from, $to, $extra) = @_;
5045         $from = 0 unless defined $from;
5046         $to = $#{$taglist} if (!defined $to || $#{$taglist} < $to);
5047
5048         print "<table class=\"tags\">\n";
5049         my $alternate = 1;
5050         for (my $i = $from; $i <= $to; $i++) {
5051                 my $entry = $taglist->[$i];
5052                 my %tag = %$entry;
5053                 my $comment = $tag{'subject'};
5054                 my $comment_short;
5055                 if (defined $comment) {
5056                         $comment_short = chop_str($comment, 30, 5);
5057                 }
5058                 if ($alternate) {
5059                         print "<tr class=\"dark\">\n";
5060                 } else {
5061                         print "<tr class=\"light\">\n";
5062                 }
5063                 $alternate ^= 1;
5064                 if (defined $tag{'age'}) {
5065                         print "<td><i>$tag{'age'}</i></td>\n";
5066                 } else {
5067                         print "<td></td>\n";
5068                 }
5069                 print "<td>" .
5070                       $cgi->a({-href => href(action=>$tag{'reftype'}, hash=>$tag{'refid'}),
5071                                -class => "list name"}, esc_html($tag{'name'})) .
5072                       "</td>\n" .
5073                       "<td>";
5074                 if (defined $comment) {
5075                         print format_subject_html($comment, $comment_short,
5076                                                   href(action=>"tag", hash=>$tag{'id'}));
5077                 }
5078                 print "</td>\n" .
5079                       "<td class=\"selflink\">";
5080                 if ($tag{'type'} eq "tag") {
5081                         print $cgi->a({-href => href(action=>"tag", hash=>$tag{'id'})}, "tag");
5082                 } else {
5083                         print "&nbsp;";
5084                 }
5085                 print "</td>\n" .
5086                       "<td class=\"link\">" . " | " .
5087                       $cgi->a({-href => href(action=>$tag{'reftype'}, hash=>$tag{'refid'})}, $tag{'reftype'});
5088                 if ($tag{'reftype'} eq "commit") {
5089                         print " | " . $cgi->a({-href => href(action=>"shortlog", hash=>$tag{'fullname'})}, "shortlog") .
5090                               " | " . $cgi->a({-href => href(action=>"log", hash=>$tag{'fullname'})}, "log");
5091                 } elsif ($tag{'reftype'} eq "blob") {
5092                         print " | " . $cgi->a({-href => href(action=>"blob_plain", hash=>$tag{'refid'})}, "raw");
5093                 }
5094                 print "</td>\n" .
5095                       "</tr>";
5096         }
5097         if (defined $extra) {
5098                 print "<tr>\n" .
5099                       "<td colspan=\"5\">$extra</td>\n" .
5100                       "</tr>\n";
5101         }
5102         print "</table>\n";
5103 }
5104
5105 sub git_heads_body {
5106         # uses global variable $project
5107         my ($headlist, $head, $from, $to, $extra) = @_;
5108         $from = 0 unless defined $from;
5109         $to = $#{$headlist} if (!defined $to || $#{$headlist} < $to);
5110
5111         print "<table class=\"heads\">\n";
5112         my $alternate = 1;
5113         for (my $i = $from; $i <= $to; $i++) {
5114                 my $entry = $headlist->[$i];
5115                 my %ref = %$entry;
5116                 my $curr = $ref{'id'} eq $head;
5117                 if ($alternate) {
5118                         print "<tr class=\"dark\">\n";
5119                 } else {
5120                         print "<tr class=\"light\">\n";
5121                 }
5122                 $alternate ^= 1;
5123                 print "<td><i>$ref{'age'}</i></td>\n" .
5124                       ($curr ? "<td class=\"current_head\">" : "<td>") .
5125                       $cgi->a({-href => href(action=>"shortlog", hash=>$ref{'fullname'}),
5126                                -class => "list name"},esc_html($ref{'name'})) .
5127                       "</td>\n" .
5128                       "<td class=\"link\">" .
5129                       $cgi->a({-href => href(action=>"shortlog", hash=>$ref{'fullname'})}, "shortlog") . " | " .
5130                       $cgi->a({-href => href(action=>"log", hash=>$ref{'fullname'})}, "log") . " | " .
5131                       $cgi->a({-href => href(action=>"tree", hash=>$ref{'fullname'}, hash_base=>$ref{'fullname'})}, "tree") .
5132                       "</td>\n" .
5133                       "</tr>";
5134         }
5135         if (defined $extra) {
5136                 print "<tr>\n" .
5137                       "<td colspan=\"3\">$extra</td>\n" .
5138                       "</tr>\n";
5139         }
5140         print "</table>\n";
5141 }
5142
5143 # Display a single remote block
5144 sub git_remote_block {
5145         my ($remote, $rdata, $limit, $head) = @_;
5146
5147         my $heads = $rdata->{'heads'};
5148         my $fetch = $rdata->{'fetch'};
5149         my $push = $rdata->{'push'};
5150
5151         my $urls_table = "<table class=\"projects_list\">\n" ;
5152
5153         if (defined $fetch) {
5154                 if ($fetch eq $push) {
5155                         $urls_table .= format_repo_url("URL", $fetch);
5156                 } else {
5157                         $urls_table .= format_repo_url("Fetch URL", $fetch);
5158                         $urls_table .= format_repo_url("Push URL", $push) if defined $push;
5159                 }
5160         } elsif (defined $push) {
5161                 $urls_table .= format_repo_url("Push URL", $push);
5162         } else {
5163                 $urls_table .= format_repo_url("", "No remote URL");
5164         }
5165
5166         $urls_table .= "</table>\n";
5167
5168         my $dots;
5169         if (defined $limit && $limit < @$heads) {
5170                 $dots = $cgi->a({-href => href(action=>"remotes", hash=>$remote)}, "...");
5171         }
5172
5173         print $urls_table;
5174         git_heads_body($heads, $head, 0, $limit, $dots);
5175 }
5176
5177 # Display a list of remote names with the respective fetch and push URLs
5178 sub git_remotes_list {
5179         my ($remotedata, $limit) = @_;
5180         print "<table class=\"heads\">\n";
5181         my $alternate = 1;
5182         my @remotes = sort keys %$remotedata;
5183
5184         my $limited = $limit && $limit < @remotes;
5185
5186         $#remotes = $limit - 1 if $limited;
5187
5188         while (my $remote = shift @remotes) {
5189                 my $rdata = $remotedata->{$remote};
5190                 my $fetch = $rdata->{'fetch'};
5191                 my $push = $rdata->{'push'};
5192                 if ($alternate) {
5193                         print "<tr class=\"dark\">\n";
5194                 } else {
5195                         print "<tr class=\"light\">\n";
5196                 }
5197                 $alternate ^= 1;
5198                 print "<td>" .
5199                       $cgi->a({-href=> href(action=>'remotes', hash=>$remote),
5200                                -class=> "list name"},esc_html($remote)) .
5201                       "</td>";
5202                 print "<td class=\"link\">" .
5203                       (defined $fetch ? $cgi->a({-href=> $fetch}, "fetch") : "fetch") .
5204                       " | " .
5205                       (defined $push ? $cgi->a({-href=> $push}, "push") : "push") .
5206                       "</td>";
5207
5208                 print "</tr>\n";
5209         }
5210
5211         if ($limited) {
5212                 print "<tr>\n" .
5213                       "<td colspan=\"3\">" .
5214                       $cgi->a({-href => href(action=>"remotes")}, "...") .
5215                       "</td>\n" . "</tr>\n";
5216         }
5217
5218         print "</table>";
5219 }
5220
5221 # Display remote heads grouped by remote, unless there are too many
5222 # remotes, in which case we only display the remote names
5223 sub git_remotes_body {
5224         my ($remotedata, $limit, $head) = @_;
5225         if ($limit and $limit < keys %$remotedata) {
5226                 git_remotes_list($remotedata, $limit);
5227         } else {
5228                 fill_remote_heads($remotedata);
5229                 while (my ($remote, $rdata) = each %$remotedata) {
5230                         git_print_section({-class=>"remote", -id=>$remote},
5231                                 ["remotes", $remote, $remote], sub {
5232                                         git_remote_block($remote, $rdata, $limit, $head);
5233                                 });
5234                 }
5235         }
5236 }
5237
5238 sub git_search_grep_body {
5239         my ($commitlist, $from, $to, $extra) = @_;
5240         $from = 0 unless defined $from;
5241         $to = $#{$commitlist} if (!defined $to || $#{$commitlist} < $to);
5242
5243         print "<table class=\"commit_search\">\n";
5244         my $alternate = 1;
5245         for (my $i = $from; $i <= $to; $i++) {
5246                 my %co = %{$commitlist->[$i]};
5247                 if (!%co) {
5248                         next;
5249                 }
5250                 my $commit = $co{'id'};
5251                 if ($alternate) {
5252                         print "<tr class=\"dark\">\n";
5253                 } else {
5254                         print "<tr class=\"light\">\n";
5255                 }
5256                 $alternate ^= 1;
5257                 print "<td title=\"$co{'age_string_age'}\"><i>$co{'age_string_date'}</i></td>\n" .
5258                       format_author_html('td', \%co, 15, 5) .
5259                       "<td>" .
5260                       $cgi->a({-href => href(action=>"commit", hash=>$co{'id'}),
5261                                -class => "list subject"},
5262                               chop_and_escape_str($co{'title'}, 50) . "<br/>");
5263                 my $comment = $co{'comment'};
5264                 foreach my $line (@$comment) {
5265                         if ($line =~ m/^(.*?)($search_regexp)(.*)$/i) {
5266                                 my ($lead, $match, $trail) = ($1, $2, $3);
5267                                 $match = chop_str($match, 70, 5, 'center');
5268                                 my $contextlen = int((80 - length($match))/2);
5269                                 $contextlen = 30 if ($contextlen > 30);
5270                                 $lead  = chop_str($lead,  $contextlen, 10, 'left');
5271                                 $trail = chop_str($trail, $contextlen, 10, 'right');
5272
5273                                 $lead  = esc_html($lead);
5274                                 $match = esc_html($match);
5275                                 $trail = esc_html($trail);
5276
5277                                 print "$lead<span class=\"match\">$match</span>$trail<br />";
5278                         }
5279                 }
5280                 print "</td>\n" .
5281                       "<td class=\"link\">" .
5282                       $cgi->a({-href => href(action=>"commit", hash=>$co{'id'})}, "commit") .
5283                       " | " .
5284                       $cgi->a({-href => href(action=>"commitdiff", hash=>$co{'id'})}, "commitdiff") .
5285                       " | " .
5286                       $cgi->a({-href => href(action=>"tree", hash=>$co{'tree'}, hash_base=>$co{'id'})}, "tree");
5287                 print "</td>\n" .
5288                       "</tr>\n";
5289         }
5290         if (defined $extra) {
5291                 print "<tr>\n" .
5292                       "<td colspan=\"3\">$extra</td>\n" .
5293                       "</tr>\n";
5294         }
5295         print "</table>\n";
5296 }
5297
5298 ## ======================================================================
5299 ## ======================================================================
5300 ## actions
5301
5302 sub git_project_list {
5303         my $order = $input_params{'order'};
5304         if (defined $order && $order !~ m/none|project|descr|owner|age/) {
5305                 die_error(400, "Unknown order parameter");
5306         }
5307
5308         my @list = git_get_projects_list();
5309         if (!@list) {
5310                 die_error(404, "No projects found");
5311         }
5312
5313         git_header_html();
5314         if (defined $home_text && -f $home_text) {
5315                 print "<div class=\"index_include\">\n";
5316                 insert_file($home_text);
5317                 print "</div>\n";
5318         }
5319         print $cgi->startform(-method => "get") .
5320               "<p class=\"projsearch\">Search:\n" .
5321               $cgi->textfield(-name => "s", -value => $searchtext) . "\n" .
5322               "</p>" .
5323               $cgi->end_form() . "\n";
5324         git_project_list_body(\@list, $order);
5325         git_footer_html();
5326 }
5327
5328 sub git_forks {
5329         my $order = $input_params{'order'};
5330         if (defined $order && $order !~ m/none|project|descr|owner|age/) {
5331                 die_error(400, "Unknown order parameter");
5332         }
5333
5334         my @list = git_get_projects_list($project);
5335         if (!@list) {
5336                 die_error(404, "No forks found");
5337         }
5338
5339         git_header_html();
5340         git_print_page_nav('','');
5341         git_print_header_div('summary', "$project forks");
5342         git_project_list_body(\@list, $order);
5343         git_footer_html();
5344 }
5345
5346 sub git_project_index {
5347         my @projects = git_get_projects_list($project);
5348
5349         print $cgi->header(
5350                 -type => 'text/plain',
5351                 -charset => 'utf-8',
5352                 -content_disposition => 'inline; filename="index.aux"');
5353
5354         foreach my $pr (@projects) {
5355                 if (!exists $pr->{'owner'}) {
5356                         $pr->{'owner'} = git_get_project_owner("$pr->{'path'}");
5357                 }
5358
5359                 my ($path, $owner) = ($pr->{'path'}, $pr->{'owner'});
5360                 # quote as in CGI::Util::encode, but keep the slash, and use '+' for ' '
5361                 $path  =~ s/([^a-zA-Z0-9_.\-\/ ])/sprintf("%%%02X", ord($1))/eg;
5362                 $owner =~ s/([^a-zA-Z0-9_.\-\/ ])/sprintf("%%%02X", ord($1))/eg;
5363                 $path  =~ s/ /\+/g;
5364                 $owner =~ s/ /\+/g;
5365
5366                 print "$path $owner\n";
5367         }
5368 }
5369
5370 sub git_summary {
5371         my $descr = git_get_project_description($project) || "none";
5372         my %co = parse_commit("HEAD");
5373         my %cd = %co ? parse_date($co{'committer_epoch'}, $co{'committer_tz'}) : ();
5374         my $head = $co{'id'};
5375         my $remote_heads = gitweb_check_feature('remote_heads');
5376
5377         my $owner = git_get_project_owner($project);
5378
5379         my $refs = git_get_references();
5380         # These get_*_list functions return one more to allow us to see if
5381         # there are more ...
5382         my @taglist  = git_get_tags_list(16);
5383         my @headlist = git_get_heads_list(16);
5384         my %remotedata = $remote_heads ? git_get_remotes_list() : ();
5385         my @forklist;
5386         my $check_forks = gitweb_check_feature('forks');
5387
5388         if ($check_forks) {
5389                 @forklist = git_get_projects_list($project);
5390         }
5391
5392         git_header_html();
5393         git_print_page_nav('summary','', $head);
5394
5395         print "<div class=\"title\">&nbsp;</div>\n";
5396         print "<table class=\"projects_list\">\n" .
5397               "<tr id=\"metadata_desc\"><td>description</td><td>" . esc_html($descr) . "</td></tr>\n" .
5398               "<tr id=\"metadata_owner\"><td>owner</td><td>" . esc_html($owner) . "</td></tr>\n";
5399         if (defined $cd{'rfc2822'}) {
5400                 print "<tr id=\"metadata_lchange\"><td>last change</td><td>$cd{'rfc2822'}</td></tr>\n";
5401         }
5402
5403         # use per project git URL list in $projectroot/$project/cloneurl
5404         # or make project git URL from git base URL and project name
5405         my $url_tag = "URL";
5406         my @url_list = git_get_project_url_list($project);
5407         @url_list = map { "$_/$project" } @git_base_url_list unless @url_list;
5408         foreach my $git_url (@url_list) {
5409                 next unless $git_url;
5410                 print format_repo_url($url_tag, $git_url);
5411                 $url_tag = "";
5412         }
5413
5414         # Tag cloud
5415         my $show_ctags = gitweb_check_feature('ctags');
5416         if ($show_ctags) {
5417                 my $ctags = git_get_project_ctags($project);
5418                 my $cloud = git_populate_project_tagcloud($ctags);
5419                 print "<tr id=\"metadata_ctags\"><td>Content tags:<br />";
5420                 print "</td>\n<td>" unless %$ctags;
5421                 print "<form action=\"$show_ctags\" method=\"post\"><input type=\"hidden\" name=\"p\" value=\"$project\" />Add: <input type=\"text\" name=\"t\" size=\"8\" /></form>";
5422                 print "</td>\n<td>" if %$ctags;
5423                 print git_show_project_tagcloud($cloud, 48);
5424                 print "</td></tr>";
5425         }
5426
5427         print "</table>\n";
5428
5429         # If XSS prevention is on, we don't include README.html.
5430         # TODO: Allow a readme in some safe format.
5431         if (!$prevent_xss && -s "$projectroot/$project/README.html") {
5432                 print "<div class=\"title\">readme</div>\n" .
5433                       "<div class=\"readme\">\n";
5434                 insert_file("$projectroot/$project/README.html");
5435                 print "\n</div>\n"; # class="readme"
5436         }
5437
5438         # we need to request one more than 16 (0..15) to check if
5439         # those 16 are all
5440         my @commitlist = $head ? parse_commits($head, 17) : ();
5441         if (@commitlist) {
5442                 git_print_header_div('shortlog');
5443                 git_shortlog_body(\@commitlist, 0, 15, $refs,
5444                                   $#commitlist <=  15 ? undef :
5445                                   $cgi->a({-href => href(action=>"shortlog")}, "..."));
5446         }
5447
5448         if (@taglist) {
5449                 git_print_header_div('tags');
5450                 git_tags_body(\@taglist, 0, 15,
5451                               $#taglist <=  15 ? undef :
5452                               $cgi->a({-href => href(action=>"tags")}, "..."));
5453         }
5454
5455         if (@headlist) {
5456                 git_print_header_div('heads');
5457                 git_heads_body(\@headlist, $head, 0, 15,
5458                                $#headlist <= 15 ? undef :
5459                                $cgi->a({-href => href(action=>"heads")}, "..."));
5460         }
5461
5462         if (%remotedata) {
5463                 git_print_header_div('remotes');
5464                 git_remotes_body(\%remotedata, 15, $head);
5465         }
5466
5467         if (@forklist) {
5468                 git_print_header_div('forks');
5469                 git_project_list_body(\@forklist, 'age', 0, 15,
5470                                       $#forklist <= 15 ? undef :
5471                                       $cgi->a({-href => href(action=>"forks")}, "..."),
5472                                       'no_header');
5473         }
5474
5475         git_footer_html();
5476 }
5477
5478 sub git_tag {
5479         my %tag = parse_tag($hash);
5480
5481         if (! %tag) {
5482                 die_error(404, "Unknown tag object");
5483         }
5484
5485         my $head = git_get_head_hash($project);
5486         git_header_html();
5487         git_print_page_nav('','', $head,undef,$head);
5488         git_print_header_div('commit', esc_html($tag{'name'}), $hash);
5489         print "<div class=\"title_text\">\n" .
5490               "<table class=\"object_header\">\n" .
5491               "<tr>\n" .
5492               "<td>object</td>\n" .
5493               "<td>" . $cgi->a({-class => "list", -href => href(action=>$tag{'type'}, hash=>$tag{'object'})},
5494                                $tag{'object'}) . "</td>\n" .
5495               "<td class=\"link\">" . $cgi->a({-href => href(action=>$tag{'type'}, hash=>$tag{'object'})},
5496                                               $tag{'type'}) . "</td>\n" .
5497               "</tr>\n";
5498         if (defined($tag{'author'})) {
5499                 git_print_authorship_rows(\%tag, 'author');
5500         }
5501         print "</table>\n\n" .
5502               "</div>\n";
5503         print "<div class=\"page_body\">";
5504         my $comment = $tag{'comment'};
5505         foreach my $line (@$comment) {
5506                 chomp $line;
5507                 print esc_html($line, -nbsp=>1) . "<br/>\n";
5508         }
5509         print "</div>\n";
5510         git_footer_html();
5511 }
5512
5513 sub git_blame_common {
5514         my $format = shift || 'porcelain';
5515         if ($format eq 'porcelain' && $cgi->param('js')) {
5516                 $format = 'incremental';
5517                 $action = 'blame_incremental'; # for page title etc
5518         }
5519
5520         # permissions
5521         gitweb_check_feature('blame')
5522                 or die_error(403, "Blame view not allowed");
5523
5524         # error checking
5525         die_error(400, "No file name given") unless $file_name;
5526         $hash_base ||= git_get_head_hash($project);
5527         die_error(404, "Couldn't find base commit") unless $hash_base;
5528         my %co = parse_commit($hash_base)
5529                 or die_error(404, "Commit not found");
5530         my $ftype = "blob";
5531         if (!defined $hash) {
5532                 $hash = git_get_hash_by_path($hash_base, $file_name, "blob")
5533                         or die_error(404, "Error looking up file");
5534         } else {
5535                 $ftype = git_get_type($hash);
5536                 if ($ftype !~ "blob") {
5537                         die_error(400, "Object is not a blob");
5538                 }
5539         }
5540
5541         my $fd;
5542         if ($format eq 'incremental') {
5543                 # get file contents (as base)
5544                 open $fd, "-|", git_cmd(), 'cat-file', 'blob', $hash
5545                         or die_error(500, "Open git-cat-file failed");
5546         } elsif ($format eq 'data') {
5547                 # run git-blame --incremental
5548                 open $fd, "-|", git_cmd(), "blame", "--incremental",
5549                         $hash_base, "--", $file_name
5550                         or die_error(500, "Open git-blame --incremental failed");
5551         } else {
5552                 # run git-blame --porcelain
5553                 open $fd, "-|", git_cmd(), "blame", '-p',
5554                         $hash_base, '--', $file_name
5555                         or die_error(500, "Open git-blame --porcelain failed");
5556         }
5557
5558         # incremental blame data returns early
5559         if ($format eq 'data') {
5560                 print $cgi->header(
5561                         -type=>"text/plain", -charset => "utf-8",
5562                         -status=> "200 OK");
5563                 local $| = 1; # output autoflush
5564                 print while <$fd>;
5565                 close $fd
5566                         or print "ERROR $!\n";
5567
5568                 print 'END';
5569                 if (defined $t0 && gitweb_check_feature('timed')) {
5570                         print ' '.
5571                               tv_interval($t0, [ gettimeofday() ]).
5572                               ' '.$number_of_git_cmds;
5573                 }
5574                 print "\n";
5575
5576                 return;
5577         }
5578
5579         # page header
5580         git_header_html();
5581         my $formats_nav =
5582                 $cgi->a({-href => href(action=>"blob", -replay=>1)},
5583                         "blob") .
5584                 " | ";
5585         if ($format eq 'incremental') {
5586                 $formats_nav .=
5587                         $cgi->a({-href => href(action=>"blame", javascript=>0, -replay=>1)},
5588                                 "blame") . " (non-incremental)";
5589         } else {
5590                 $formats_nav .=
5591                         $cgi->a({-href => href(action=>"blame_incremental", -replay=>1)},
5592                                 "blame") . " (incremental)";
5593         }
5594         $formats_nav .=
5595                 " | " .
5596                 $cgi->a({-href => href(action=>"history", -replay=>1)},
5597                         "history") .
5598                 " | " .
5599                 $cgi->a({-href => href(action=>$action, file_name=>$file_name)},
5600                         "HEAD");
5601         git_print_page_nav('','', $hash_base,$co{'tree'},$hash_base, $formats_nav);
5602         git_print_header_div('commit', esc_html($co{'title'}), $hash_base);
5603         git_print_page_path($file_name, $ftype, $hash_base);
5604
5605         # page body
5606         if ($format eq 'incremental') {
5607                 print "<noscript>\n<div class=\"error\"><center><b>\n".
5608                       "This page requires JavaScript to run.\n Use ".
5609                       $cgi->a({-href => href(action=>'blame',javascript=>0,-replay=>1)},
5610                               'this page').
5611                       " instead.\n".
5612                       "</b></center></div>\n</noscript>\n";
5613
5614                 print qq!<div id="progress_bar" style="width: 100%; background-color: yellow"></div>\n!;
5615         }
5616
5617         print qq!<div class="page_body">\n!;
5618         print qq!<div id="progress_info">... / ...</div>\n!
5619                 if ($format eq 'incremental');
5620         print qq!<table id="blame_table" class="blame" width="100%">\n!.
5621               #qq!<col width="5.5em" /><col width="2.5em" /><col width="*" />\n!.
5622               qq!<thead>\n!.
5623               qq!<tr><th>Commit</th><th>Line</th><th>Data</th></tr>\n!.
5624               qq!</thead>\n!.
5625               qq!<tbody>\n!;
5626
5627         my @rev_color = qw(light dark);
5628         my $num_colors = scalar(@rev_color);
5629         my $current_color = 0;
5630
5631         if ($format eq 'incremental') {
5632                 my $color_class = $rev_color[$current_color];
5633
5634                 #contents of a file
5635                 my $linenr = 0;
5636         LINE:
5637                 while (my $line = <$fd>) {
5638                         chomp $line;
5639                         $linenr++;
5640
5641                         print qq!<tr id="l$linenr" class="$color_class">!.
5642                               qq!<td class="sha1"><a href=""> </a></td>!.
5643                               qq!<td class="linenr">!.
5644                               qq!<a class="linenr" href="">$linenr</a></td>!;
5645                         print qq!<td class="pre">! . esc_html($line) . "</td>\n";
5646                         print qq!</tr>\n!;
5647                 }
5648
5649         } else { # porcelain, i.e. ordinary blame
5650                 my %metainfo = (); # saves information about commits
5651
5652                 # blame data
5653         LINE:
5654                 while (my $line = <$fd>) {
5655                         chomp $line;
5656                         # the header: <SHA-1> <src lineno> <dst lineno> [<lines in group>]
5657                         # no <lines in group> for subsequent lines in group of lines
5658                         my ($full_rev, $orig_lineno, $lineno, $group_size) =
5659                            ($line =~ /^([0-9a-f]{40}) (\d+) (\d+)(?: (\d+))?$/);
5660                         if (!exists $metainfo{$full_rev}) {
5661                                 $metainfo{$full_rev} = { 'nprevious' => 0 };
5662                         }
5663                         my $meta = $metainfo{$full_rev};
5664                         my $data;
5665                         while ($data = <$fd>) {
5666                                 chomp $data;
5667                                 last if ($data =~ s/^\t//); # contents of line
5668                                 if ($data =~ /^(\S+)(?: (.*))?$/) {
5669                                         $meta->{$1} = $2 unless exists $meta->{$1};
5670                                 }
5671                                 if ($data =~ /^previous /) {
5672                                         $meta->{'nprevious'}++;
5673                                 }
5674                         }
5675                         my $short_rev = substr($full_rev, 0, 8);
5676                         my $author = $meta->{'author'};
5677                         my %date =
5678                                 parse_date($meta->{'author-time'}, $meta->{'author-tz'});
5679                         my $date = $date{'iso-tz'};
5680                         if ($group_size) {
5681                                 $current_color = ($current_color + 1) % $num_colors;
5682                         }
5683                         my $tr_class = $rev_color[$current_color];
5684                         $tr_class .= ' boundary' if (exists $meta->{'boundary'});
5685                         $tr_class .= ' no-previous' if ($meta->{'nprevious'} == 0);
5686                         $tr_class .= ' multiple-previous' if ($meta->{'nprevious'} > 1);
5687                         print "<tr id=\"l$lineno\" class=\"$tr_class\">\n";
5688                         if ($group_size) {
5689                                 print "<td class=\"sha1\"";
5690                                 print " title=\"". esc_html($author) . ", $date\"";
5691                                 print " rowspan=\"$group_size\"" if ($group_size > 1);
5692                                 print ">";
5693                                 print $cgi->a({-href => href(action=>"commit",
5694                                                              hash=>$full_rev,
5695                                                              file_name=>$file_name)},
5696                                               esc_html($short_rev));
5697                                 if ($group_size >= 2) {
5698                                         my @author_initials = ($author =~ /\b([[:upper:]])\B/g);
5699                                         if (@author_initials) {
5700                                                 print "<br />" .
5701                                                       esc_html(join('', @author_initials));
5702                                                 #           or join('.', ...)
5703                                         }
5704                                 }
5705                                 print "</td>\n";
5706                         }
5707                         # 'previous' <sha1 of parent commit> <filename at commit>
5708                         if (exists $meta->{'previous'} &&
5709                             $meta->{'previous'} =~ /^([a-fA-F0-9]{40}) (.*)$/) {
5710                                 $meta->{'parent'} = $1;
5711                                 $meta->{'file_parent'} = unquote($2);
5712                         }
5713                         my $linenr_commit =
5714                                 exists($meta->{'parent'}) ?
5715                                 $meta->{'parent'} : $full_rev;
5716                         my $linenr_filename =
5717                                 exists($meta->{'file_parent'}) ?
5718                                 $meta->{'file_parent'} : unquote($meta->{'filename'});
5719                         my $blamed = href(action => 'blame',
5720                                           file_name => $linenr_filename,
5721                                           hash_base => $linenr_commit);
5722                         print "<td class=\"linenr\">";
5723                         print $cgi->a({ -href => "$blamed#l$orig_lineno",
5724                                         -class => "linenr" },
5725                                       esc_html($lineno));
5726                         print "</td>";
5727                         print "<td class=\"pre\">" . esc_html($data) . "</td>\n";
5728                         print "</tr>\n";
5729                 } # end while
5730
5731         }
5732
5733         # footer
5734         print "</tbody>\n".
5735               "</table>\n"; # class="blame"
5736         print "</div>\n";   # class="blame_body"
5737         close $fd
5738                 or print "Reading blob failed\n";
5739
5740         git_footer_html();
5741 }
5742
5743 sub git_blame {
5744         git_blame_common();
5745 }
5746
5747 sub git_blame_incremental {
5748         git_blame_common('incremental');
5749 }
5750
5751 sub git_blame_data {
5752         git_blame_common('data');
5753 }
5754
5755 sub git_tags {
5756         my $head = git_get_head_hash($project);
5757         git_header_html();
5758         git_print_page_nav('','', $head,undef,$head,format_ref_views('tags'));
5759         git_print_header_div('summary', $project);
5760
5761         my @tagslist = git_get_tags_list();
5762         if (@tagslist) {
5763                 git_tags_body(\@tagslist);
5764         }
5765         git_footer_html();
5766 }
5767
5768 sub git_heads {
5769         my $head = git_get_head_hash($project);
5770         git_header_html();
5771         git_print_page_nav('','', $head,undef,$head,format_ref_views('heads'));
5772         git_print_header_div('summary', $project);
5773
5774         my @headslist = git_get_heads_list();
5775         if (@headslist) {
5776                 git_heads_body(\@headslist, $head);
5777         }
5778         git_footer_html();
5779 }
5780
5781 # used both for single remote view and for list of all the remotes
5782 sub git_remotes {
5783         gitweb_check_feature('remote_heads')
5784                 or die_error(403, "Remote heads view is disabled");
5785
5786         my $head = git_get_head_hash($project);
5787         my $remote = $input_params{'hash'};
5788
5789         my $remotedata = git_get_remotes_list($remote);
5790         die_error(500, "Unable to get remote information") unless defined $remotedata;
5791
5792         unless (%$remotedata) {
5793                 die_error(404, defined $remote ?
5794                         "Remote $remote not found" :
5795                         "No remotes found");
5796         }
5797
5798         git_header_html(undef, undef, -action_extra => $remote);
5799         git_print_page_nav('', '',  $head, undef, $head,
5800                 format_ref_views($remote ? '' : 'remotes'));
5801
5802         fill_remote_heads($remotedata);
5803         if (defined $remote) {
5804                 git_print_header_div('remotes', "$remote remote for $project");
5805                 git_remote_block($remote, $remotedata->{$remote}, undef, $head);
5806         } else {
5807                 git_print_header_div('summary', "$project remotes");
5808                 git_remotes_body($remotedata, undef, $head);
5809         }
5810
5811         git_footer_html();
5812 }
5813
5814 sub git_blob_plain {
5815         my $type = shift;
5816         my $expires;
5817
5818         if (!defined $hash) {
5819                 if (defined $file_name) {
5820                         my $base = $hash_base || git_get_head_hash($project);
5821                         $hash = git_get_hash_by_path($base, $file_name, "blob")
5822                                 or die_error(404, "Cannot find file");
5823                 } else {
5824                         die_error(400, "No file name defined");
5825                 }
5826         } elsif ($hash =~ m/^[0-9a-fA-F]{40}$/) {
5827                 # blobs defined by non-textual hash id's can be cached
5828                 $expires = "+1d";
5829         }
5830
5831         open my $fd, "-|", git_cmd(), "cat-file", "blob", $hash
5832                 or die_error(500, "Open git-cat-file blob '$hash' failed");
5833
5834         # content-type (can include charset)
5835         $type = blob_contenttype($fd, $file_name, $type);
5836
5837         # "save as" filename, even when no $file_name is given
5838         my $save_as = "$hash";
5839         if (defined $file_name) {
5840                 $save_as = $file_name;
5841         } elsif ($type =~ m/^text\//) {
5842                 $save_as .= '.txt';
5843         }
5844
5845         # With XSS prevention on, blobs of all types except a few known safe
5846         # ones are served with "Content-Disposition: attachment" to make sure
5847         # they don't run in our security domain.  For certain image types,
5848         # blob view writes an <img> tag referring to blob_plain view, and we
5849         # want to be sure not to break that by serving the image as an
5850         # attachment (though Firefox 3 doesn't seem to care).
5851         my $sandbox = $prevent_xss &&
5852                 $type !~ m!^(?:text/plain|image/(?:gif|png|jpeg))$!;
5853
5854         print $cgi->header(
5855                 -type => $type,
5856                 -expires => $expires,
5857                 -content_disposition =>
5858                         ($sandbox ? 'attachment' : 'inline')
5859                         . '; filename="' . $save_as . '"');
5860         local $/ = undef;
5861         binmode STDOUT, ':raw';
5862         print <$fd>;
5863         binmode STDOUT, ':utf8'; # as set at the beginning of gitweb.cgi
5864         close $fd;
5865 }
5866
5867 sub git_blob {
5868         my $expires;
5869
5870         if (!defined $hash) {
5871                 if (defined $file_name) {
5872                         my $base = $hash_base || git_get_head_hash($project);
5873                         $hash = git_get_hash_by_path($base, $file_name, "blob")
5874                                 or die_error(404, "Cannot find file");
5875                 } else {
5876                         die_error(400, "No file name defined");
5877                 }
5878         } elsif ($hash =~ m/^[0-9a-fA-F]{40}$/) {
5879                 # blobs defined by non-textual hash id's can be cached
5880                 $expires = "+1d";
5881         }
5882
5883         my $have_blame = gitweb_check_feature('blame');
5884         open my $fd, "-|", git_cmd(), "cat-file", "blob", $hash
5885                 or die_error(500, "Couldn't cat $file_name, $hash");
5886         my $mimetype = blob_mimetype($fd, $file_name);
5887         # use 'blob_plain' (aka 'raw') view for files that cannot be displayed
5888         if ($mimetype !~ m!^(?:text/|image/(?:gif|png|jpeg)$)! && -B $fd) {
5889                 close $fd;
5890                 return git_blob_plain($mimetype);
5891         }
5892         # we can have blame only for text/* mimetype
5893         $have_blame &&= ($mimetype =~ m!^text/!);
5894
5895         my $highlight = gitweb_check_feature('highlight');
5896         my $syntax = guess_file_syntax($highlight, $mimetype, $file_name);
5897         $fd = run_highlighter($fd, $highlight, $syntax)
5898                 if $syntax;
5899
5900         git_header_html(undef, $expires);
5901         my $formats_nav = '';
5902         if (defined $hash_base && (my %co = parse_commit($hash_base))) {
5903                 if (defined $file_name) {
5904                         if ($have_blame) {
5905                                 $formats_nav .=
5906                                         $cgi->a({-href => href(action=>"blame", -replay=>1)},
5907                                                 "blame") .
5908                                         " | ";
5909                         }
5910                         $formats_nav .=
5911                                 $cgi->a({-href => href(action=>"history", -replay=>1)},
5912                                         "history") .
5913                                 " | " .
5914                                 $cgi->a({-href => href(action=>"blob_plain", -replay=>1)},
5915                                         "raw") .
5916                                 " | " .
5917                                 $cgi->a({-href => href(action=>"blob",
5918                                                        hash_base=>"HEAD", file_name=>$file_name)},
5919                                         "HEAD");
5920                 } else {
5921                         $formats_nav .=
5922                                 $cgi->a({-href => href(action=>"blob_plain", -replay=>1)},
5923                                         "raw");
5924                 }
5925                 git_print_page_nav('','', $hash_base,$co{'tree'},$hash_base, $formats_nav);
5926                 git_print_header_div('commit', esc_html($co{'title'}), $hash_base);
5927         } else {
5928                 print "<div class=\"page_nav\">\n" .
5929                       "<br/><br/></div>\n" .
5930                       "<div class=\"title\">".esc_html($hash)."</div>\n";
5931         }
5932         git_print_page_path($file_name, "blob", $hash_base);
5933         print "<div class=\"page_body\">\n";
5934         if ($mimetype =~ m!^image/!) {
5935                 print qq!<img type="!.esc_attr($mimetype).qq!"!;
5936                 if ($file_name) {
5937                         print qq! alt="!.esc_attr($file_name).qq!" title="!.esc_attr($file_name).qq!"!;
5938                 }
5939                 print qq! src="! .
5940                       href(action=>"blob_plain", hash=>$hash,
5941                            hash_base=>$hash_base, file_name=>$file_name) .
5942                       qq!" />\n!;
5943         } else {
5944                 my $nr;
5945                 while (my $line = <$fd>) {
5946                         chomp $line;
5947                         $nr++;
5948                         $line = untabify($line);
5949                         printf qq!<div class="pre"><a id="l%i" href="%s#l%i" class="linenr">%4i</a> %s</div>\n!,
5950                                $nr, esc_attr(href(-replay => 1)), $nr, $nr, $syntax ? $line : esc_html($line, -nbsp=>1);
5951                 }
5952         }
5953         close $fd
5954                 or print "Reading blob failed.\n";
5955         print "</div>";
5956         git_footer_html();
5957 }
5958
5959 sub git_tree {
5960         if (!defined $hash_base) {
5961                 $hash_base = "HEAD";
5962         }
5963         if (!defined $hash) {
5964                 if (defined $file_name) {
5965                         $hash = git_get_hash_by_path($hash_base, $file_name, "tree");
5966                 } else {
5967                         $hash = $hash_base;
5968                 }
5969         }
5970         die_error(404, "No such tree") unless defined($hash);
5971
5972         my $show_sizes = gitweb_check_feature('show-sizes');
5973         my $have_blame = gitweb_check_feature('blame');
5974
5975         my @entries = ();
5976         {
5977                 local $/ = "\0";
5978                 open my $fd, "-|", git_cmd(), "ls-tree", '-z',
5979                         ($show_sizes ? '-l' : ()), @extra_options, $hash
5980                         or die_error(500, "Open git-ls-tree failed");
5981                 @entries = map { chomp; $_ } <$fd>;
5982                 close $fd
5983                         or die_error(404, "Reading tree failed");
5984         }
5985
5986         my $refs = git_get_references();
5987         my $ref = format_ref_marker($refs, $hash_base);
5988         git_header_html();
5989         my $basedir = '';
5990         if (defined $hash_base && (my %co = parse_commit($hash_base))) {
5991                 my @views_nav = ();
5992                 if (defined $file_name) {
5993                         push @views_nav,
5994                                 $cgi->a({-href => href(action=>"history", -replay=>1)},
5995                                         "history"),
5996                                 $cgi->a({-href => href(action=>"tree",
5997                                                        hash_base=>"HEAD", file_name=>$file_name)},
5998                                         "HEAD"),
5999                 }
6000                 my $snapshot_links = format_snapshot_links($hash);
6001                 if (defined $snapshot_links) {
6002                         # FIXME: Should be available when we have no hash base as well.
6003                         push @views_nav, $snapshot_links;
6004                 }
6005                 git_print_page_nav('tree','', $hash_base, undef, undef,
6006                                    join(' | ', @views_nav));
6007                 git_print_header_div('commit', esc_html($co{'title'}) . $ref, $hash_base);
6008         } else {
6009                 undef $hash_base;
6010                 print "<div class=\"page_nav\">\n";
6011                 print "<br/><br/></div>\n";
6012                 print "<div class=\"title\">".esc_html($hash)."</div>\n";
6013         }
6014         if (defined $file_name) {
6015                 $basedir = $file_name;
6016                 if ($basedir ne '' && substr($basedir, -1) ne '/') {
6017                         $basedir .= '/';
6018                 }
6019                 git_print_page_path($file_name, 'tree', $hash_base);
6020         }
6021         print "<div class=\"page_body\">\n";
6022         print "<table class=\"tree\">\n";
6023         my $alternate = 1;
6024         # '..' (top directory) link if possible
6025         if (defined $hash_base &&
6026             defined $file_name && $file_name =~ m![^/]+$!) {
6027                 if ($alternate) {
6028                         print "<tr class=\"dark\">\n";
6029                 } else {
6030                         print "<tr class=\"light\">\n";
6031                 }
6032                 $alternate ^= 1;
6033
6034                 my $up = $file_name;
6035                 $up =~ s!/?[^/]+$!!;
6036                 undef $up unless $up;
6037                 # based on git_print_tree_entry
6038                 print '<td class="mode">' . mode_str('040000') . "</td>\n";
6039                 print '<td class="size">&nbsp;</td>'."\n" if $show_sizes;
6040                 print '<td class="list">';
6041                 print $cgi->a({-href => href(action=>"tree",
6042                                              hash_base=>$hash_base,
6043                                              file_name=>$up)},
6044                               "..");
6045                 print "</td>\n";
6046                 print "<td class=\"link\"></td>\n";
6047
6048                 print "</tr>\n";
6049         }
6050         foreach my $line (@entries) {
6051                 my %t = parse_ls_tree_line($line, -z => 1, -l => $show_sizes);
6052
6053                 if ($alternate) {
6054                         print "<tr class=\"dark\">\n";
6055                 } else {
6056                         print "<tr class=\"light\">\n";
6057                 }
6058                 $alternate ^= 1;
6059
6060                 git_print_tree_entry(\%t, $basedir, $hash_base, $have_blame);
6061
6062                 print "</tr>\n";
6063         }
6064         print "</table>\n" .
6065               "</div>";
6066         git_footer_html();
6067 }
6068
6069 sub snapshot_name {
6070         my ($project, $hash) = @_;
6071
6072         # path/to/project.git  -> project
6073         # path/to/project/.git -> project
6074         my $name = to_utf8($project);
6075         $name =~ s,([^/])/*\.git$,$1,;
6076         $name = basename($name);
6077         # sanitize name
6078         $name =~ s/[[:cntrl:]]/?/g;
6079
6080         my $ver = $hash;
6081         if ($hash =~ /^[0-9a-fA-F]+$/) {
6082                 # shorten SHA-1 hash
6083                 my $full_hash = git_get_full_hash($project, $hash);
6084                 if ($full_hash =~ /^$hash/ && length($hash) > 7) {
6085                         $ver = git_get_short_hash($project, $hash);
6086                 }
6087         } elsif ($hash =~ m!^refs/tags/(.*)$!) {
6088                 # tags don't need shortened SHA-1 hash
6089                 $ver = $1;
6090         } else {
6091                 # branches and other need shortened SHA-1 hash
6092                 if ($hash =~ m!^refs/(?:heads|remotes)/(.*)$!) {
6093                         $ver = $1;
6094                 }
6095                 $ver .= '-' . git_get_short_hash($project, $hash);
6096         }
6097         # in case of hierarchical branch names
6098         $ver =~ s!/!.!g;
6099
6100         # name = project-version_string
6101         $name = "$name-$ver";
6102
6103         return wantarray ? ($name, $name) : $name;
6104 }
6105
6106 sub git_snapshot {
6107         my $format = $input_params{'snapshot_format'};
6108         if (!@snapshot_fmts) {
6109                 die_error(403, "Snapshots not allowed");
6110         }
6111         # default to first supported snapshot format
6112         $format ||= $snapshot_fmts[0];
6113         if ($format !~ m/^[a-z0-9]+$/) {
6114                 die_error(400, "Invalid snapshot format parameter");
6115         } elsif (!exists($known_snapshot_formats{$format})) {
6116                 die_error(400, "Unknown snapshot format");
6117         } elsif ($known_snapshot_formats{$format}{'disabled'}) {
6118                 die_error(403, "Snapshot format not allowed");
6119         } elsif (!grep($_ eq $format, @snapshot_fmts)) {
6120                 die_error(403, "Unsupported snapshot format");
6121         }
6122
6123         my $type = git_get_type("$hash^{}");
6124         if (!$type) {
6125                 die_error(404, 'Object does not exist');
6126         }  elsif ($type eq 'blob') {
6127                 die_error(400, 'Object is not a tree-ish');
6128         }
6129
6130         my ($name, $prefix) = snapshot_name($project, $hash);
6131         my $filename = "$name$known_snapshot_formats{$format}{'suffix'}";
6132         my $cmd = quote_command(
6133                 git_cmd(), 'archive',
6134                 "--format=$known_snapshot_formats{$format}{'format'}",
6135                 "--prefix=$prefix/", $hash);
6136         if (exists $known_snapshot_formats{$format}{'compressor'}) {
6137                 $cmd .= ' | ' . quote_command(@{$known_snapshot_formats{$format}{'compressor'}});
6138         }
6139
6140         $filename =~ s/(["\\])/\\$1/g;
6141         print $cgi->header(
6142                 -type => $known_snapshot_formats{$format}{'type'},
6143                 -content_disposition => 'inline; filename="' . $filename . '"',
6144                 -status => '200 OK');
6145
6146         open my $fd, "-|", $cmd
6147                 or die_error(500, "Execute git-archive failed");
6148         binmode STDOUT, ':raw';
6149         print <$fd>;
6150         binmode STDOUT, ':utf8'; # as set at the beginning of gitweb.cgi
6151         close $fd;
6152 }
6153
6154 sub git_log_generic {
6155         my ($fmt_name, $body_subr, $base, $parent, $file_name, $file_hash) = @_;
6156
6157         my $head = git_get_head_hash($project);
6158         if (!defined $base) {
6159                 $base = $head;
6160         }
6161         if (!defined $page) {
6162                 $page = 0;
6163         }
6164         my $refs = git_get_references();
6165
6166         my $commit_hash = $base;
6167         if (defined $parent) {
6168                 $commit_hash = "$parent..$base";
6169         }
6170         my @commitlist =
6171                 parse_commits($commit_hash, 101, (100 * $page),
6172                               defined $file_name ? ($file_name, "--full-history") : ());
6173
6174         my $ftype;
6175         if (!defined $file_hash && defined $file_name) {
6176                 # some commits could have deleted file in question,
6177                 # and not have it in tree, but one of them has to have it
6178                 for (my $i = 0; $i < @commitlist; $i++) {
6179                         $file_hash = git_get_hash_by_path($commitlist[$i]{'id'}, $file_name);
6180                         last if defined $file_hash;
6181                 }
6182         }
6183         if (defined $file_hash) {
6184                 $ftype = git_get_type($file_hash);
6185         }
6186         if (defined $file_name && !defined $ftype) {
6187                 die_error(500, "Unknown type of object");
6188         }
6189         my %co;
6190         if (defined $file_name) {
6191                 %co = parse_commit($base)
6192                         or die_error(404, "Unknown commit object");
6193         }
6194
6195
6196         my $paging_nav = format_paging_nav($fmt_name, $page, $#commitlist >= 100);
6197         my $next_link = '';
6198         if ($#commitlist >= 100) {
6199                 $next_link =
6200                         $cgi->a({-href => href(-replay=>1, page=>$page+1),
6201                                  -accesskey => "n", -title => "Alt-n"}, "next");
6202         }
6203         my $patch_max = gitweb_get_feature('patches');
6204         if ($patch_max && !defined $file_name) {
6205                 if ($patch_max < 0 || @commitlist <= $patch_max) {
6206                         $paging_nav .= " &sdot; " .
6207                                 $cgi->a({-href => href(action=>"patches", -replay=>1)},
6208                                         "patches");
6209                 }
6210         }
6211
6212         git_header_html();
6213         git_print_page_nav($fmt_name,'', $hash,$hash,$hash, $paging_nav);
6214         if (defined $file_name) {
6215                 git_print_header_div('commit', esc_html($co{'title'}), $base);
6216         } else {
6217                 git_print_header_div('summary', $project)
6218         }
6219         git_print_page_path($file_name, $ftype, $hash_base)
6220                 if (defined $file_name);
6221
6222         $body_subr->(\@commitlist, 0, 99, $refs, $next_link,
6223                      $file_name, $file_hash, $ftype);
6224
6225         git_footer_html();
6226 }
6227
6228 sub git_log {
6229         git_log_generic('log', \&git_log_body,
6230                         $hash, $hash_parent);
6231 }
6232
6233 sub git_commit {
6234         $hash ||= $hash_base || "HEAD";
6235         my %co = parse_commit($hash)
6236             or die_error(404, "Unknown commit object");
6237
6238         my $parent  = $co{'parent'};
6239         my $parents = $co{'parents'}; # listref
6240
6241         # we need to prepare $formats_nav before any parameter munging
6242         my $formats_nav;
6243         if (!defined $parent) {
6244                 # --root commitdiff
6245                 $formats_nav .= '(initial)';
6246         } elsif (@$parents == 1) {
6247                 # single parent commit
6248                 $formats_nav .=
6249                         '(parent: ' .
6250                         $cgi->a({-href => href(action=>"commit",
6251                                                hash=>$parent)},
6252                                 esc_html(substr($parent, 0, 7))) .
6253                         ')';
6254         } else {
6255                 # merge commit
6256                 $formats_nav .=
6257                         '(merge: ' .
6258                         join(' ', map {
6259                                 $cgi->a({-href => href(action=>"commit",
6260                                                        hash=>$_)},
6261                                         esc_html(substr($_, 0, 7)));
6262                         } @$parents ) .
6263                         ')';
6264         }
6265         if (gitweb_check_feature('patches') && @$parents <= 1) {
6266                 $formats_nav .= " | " .
6267                         $cgi->a({-href => href(action=>"patch", -replay=>1)},
6268                                 "patch");
6269         }
6270
6271         if (!defined $parent) {
6272                 $parent = "--root";
6273         }
6274         my @difftree;
6275         open my $fd, "-|", git_cmd(), "diff-tree", '-r', "--no-commit-id",
6276                 @diff_opts,
6277                 (@$parents <= 1 ? $parent : '-c'),
6278                 $hash, "--"
6279                 or die_error(500, "Open git-diff-tree failed");
6280         @difftree = map { chomp; $_ } <$fd>;
6281         close $fd or die_error(404, "Reading git-diff-tree failed");
6282
6283         # non-textual hash id's can be cached
6284         my $expires;
6285         if ($hash =~ m/^[0-9a-fA-F]{40}$/) {
6286                 $expires = "+1d";
6287         }
6288         my $refs = git_get_references();
6289         my $ref = format_ref_marker($refs, $co{'id'});
6290
6291         git_header_html(undef, $expires);
6292         git_print_page_nav('commit', '',
6293                            $hash, $co{'tree'}, $hash,
6294                            $formats_nav);
6295
6296         if (defined $co{'parent'}) {
6297                 git_print_header_div('commitdiff', esc_html($co{'title'}) . $ref, $hash);
6298         } else {
6299                 git_print_header_div('tree', esc_html($co{'title'}) . $ref, $co{'tree'}, $hash);
6300         }
6301         print "<div class=\"title_text\">\n" .
6302               "<table class=\"object_header\">\n";
6303         git_print_authorship_rows(\%co);
6304         print "<tr><td>commit</td><td class=\"sha1\">$co{'id'}</td></tr>\n";
6305         print "<tr>" .
6306               "<td>tree</td>" .
6307               "<td class=\"sha1\">" .
6308               $cgi->a({-href => href(action=>"tree", hash=>$co{'tree'}, hash_base=>$hash),
6309                        class => "list"}, $co{'tree'}) .
6310               "</td>" .
6311               "<td class=\"link\">" .
6312               $cgi->a({-href => href(action=>"tree", hash=>$co{'tree'}, hash_base=>$hash)},
6313                       "tree");
6314         my $snapshot_links = format_snapshot_links($hash);
6315         if (defined $snapshot_links) {
6316                 print " | " . $snapshot_links;
6317         }
6318         print "</td>" .
6319               "</tr>\n";
6320
6321         foreach my $par (@$parents) {
6322                 print "<tr>" .
6323                       "<td>parent</td>" .
6324                       "<td class=\"sha1\">" .
6325                       $cgi->a({-href => href(action=>"commit", hash=>$par),
6326                                class => "list"}, $par) .
6327                       "</td>" .
6328                       "<td class=\"link\">" .
6329                       $cgi->a({-href => href(action=>"commit", hash=>$par)}, "commit") .
6330                       " | " .
6331                       $cgi->a({-href => href(action=>"commitdiff", hash=>$hash, hash_parent=>$par)}, "diff") .
6332                       "</td>" .
6333                       "</tr>\n";
6334         }
6335         print "</table>".
6336               "</div>\n";
6337
6338         print "<div class=\"page_body\">\n";
6339         git_print_log($co{'comment'});
6340         print "</div>\n";
6341
6342         git_difftree_body(\@difftree, $hash, @$parents);
6343
6344         git_footer_html();
6345 }
6346
6347 sub git_object {
6348         # object is defined by:
6349         # - hash or hash_base alone
6350         # - hash_base and file_name
6351         my $type;
6352
6353         # - hash or hash_base alone
6354         if ($hash || ($hash_base && !defined $file_name)) {
6355                 my $object_id = $hash || $hash_base;
6356
6357                 open my $fd, "-|", quote_command(
6358                         git_cmd(), 'cat-file', '-t', $object_id) . ' 2> /dev/null'
6359                         or die_error(404, "Object does not exist");
6360                 $type = <$fd>;
6361                 chomp $type;
6362                 close $fd
6363                         or die_error(404, "Object does not exist");
6364
6365         # - hash_base and file_name
6366         } elsif ($hash_base && defined $file_name) {
6367                 $file_name =~ s,/+$,,;
6368
6369                 system(git_cmd(), "cat-file", '-e', $hash_base) == 0
6370                         or die_error(404, "Base object does not exist");
6371
6372                 # here errors should not hapen
6373                 open my $fd, "-|", git_cmd(), "ls-tree", $hash_base, "--", $file_name
6374                         or die_error(500, "Open git-ls-tree failed");
6375                 my $line = <$fd>;
6376                 close $fd;
6377
6378                 #'100644 blob 0fa3f3a66fb6a137f6ec2c19351ed4d807070ffa  panic.c'
6379                 unless ($line && $line =~ m/^([0-9]+) (.+) ([0-9a-fA-F]{40})\t/) {
6380                         die_error(404, "File or directory for given base does not exist");
6381                 }
6382                 $type = $2;
6383                 $hash = $3;
6384         } else {
6385                 die_error(400, "Not enough information to find object");
6386         }
6387
6388         print $cgi->redirect(-uri => href(action=>$type, -full=>1,
6389                                           hash=>$hash, hash_base=>$hash_base,
6390                                           file_name=>$file_name),
6391                              -status => '302 Found');
6392 }
6393
6394 sub git_blobdiff {
6395         my $format = shift || 'html';
6396
6397         my $fd;
6398         my @difftree;
6399         my %diffinfo;
6400         my $expires;
6401
6402         # preparing $fd and %diffinfo for git_patchset_body
6403         # new style URI
6404         if (defined $hash_base && defined $hash_parent_base) {
6405                 if (defined $file_name) {
6406                         # read raw output
6407                         open $fd, "-|", git_cmd(), "diff-tree", '-r', @diff_opts,
6408                                 $hash_parent_base, $hash_base,
6409                                 "--", (defined $file_parent ? $file_parent : ()), $file_name
6410                                 or die_error(500, "Open git-diff-tree failed");
6411                         @difftree = map { chomp; $_ } <$fd>;
6412                         close $fd
6413                                 or die_error(404, "Reading git-diff-tree failed");
6414                         @difftree
6415                                 or die_error(404, "Blob diff not found");
6416
6417                 } elsif (defined $hash &&
6418                          $hash =~ /[0-9a-fA-F]{40}/) {
6419                         # try to find filename from $hash
6420
6421                         # read filtered raw output
6422                         open $fd, "-|", git_cmd(), "diff-tree", '-r', @diff_opts,
6423                                 $hash_parent_base, $hash_base, "--"
6424                                 or die_error(500, "Open git-diff-tree failed");
6425                         @difftree =
6426                                 # ':100644 100644 03b21826... 3b93d5e7... M     ls-files.c'
6427                                 # $hash == to_id
6428                                 grep { /^:[0-7]{6} [0-7]{6} [0-9a-fA-F]{40} $hash/ }
6429                                 map { chomp; $_ } <$fd>;
6430                         close $fd
6431                                 or die_error(404, "Reading git-diff-tree failed");
6432                         @difftree
6433                                 or die_error(404, "Blob diff not found");
6434
6435                 } else {
6436                         die_error(400, "Missing one of the blob diff parameters");
6437                 }
6438
6439                 if (@difftree > 1) {
6440                         die_error(400, "Ambiguous blob diff specification");
6441                 }
6442
6443                 %diffinfo = parse_difftree_raw_line($difftree[0]);
6444                 $file_parent ||= $diffinfo{'from_file'} || $file_name;
6445                 $file_name   ||= $diffinfo{'to_file'};
6446
6447                 $hash_parent ||= $diffinfo{'from_id'};
6448                 $hash        ||= $diffinfo{'to_id'};
6449
6450                 # non-textual hash id's can be cached
6451                 if ($hash_base =~ m/^[0-9a-fA-F]{40}$/ &&
6452                     $hash_parent_base =~ m/^[0-9a-fA-F]{40}$/) {
6453                         $expires = '+1d';
6454                 }
6455
6456                 # open patch output
6457                 open $fd, "-|", git_cmd(), "diff-tree", '-r', @diff_opts,
6458                         '-p', ($format eq 'html' ? "--full-index" : ()),
6459                         $hash_parent_base, $hash_base,
6460                         "--", (defined $file_parent ? $file_parent : ()), $file_name
6461                         or die_error(500, "Open git-diff-tree failed");
6462         }
6463
6464         # old/legacy style URI -- not generated anymore since 1.4.3.
6465         if (!%diffinfo) {
6466                 die_error('404 Not Found', "Missing one of the blob diff parameters")
6467         }
6468
6469         # header
6470         if ($format eq 'html') {
6471                 my $formats_nav =
6472                         $cgi->a({-href => href(action=>"blobdiff_plain", -replay=>1)},
6473                                 "raw");
6474                 git_header_html(undef, $expires);
6475                 if (defined $hash_base && (my %co = parse_commit($hash_base))) {
6476                         git_print_page_nav('','', $hash_base,$co{'tree'},$hash_base, $formats_nav);
6477                         git_print_header_div('commit', esc_html($co{'title'}), $hash_base);
6478                 } else {
6479                         print "<div class=\"page_nav\"><br/>$formats_nav<br/></div>\n";
6480                         print "<div class=\"title\">".esc_html("$hash vs $hash_parent")."</div>\n";
6481                 }
6482                 if (defined $file_name) {
6483                         git_print_page_path($file_name, "blob", $hash_base);
6484                 } else {
6485                         print "<div class=\"page_path\"></div>\n";
6486                 }
6487
6488         } elsif ($format eq 'plain') {
6489                 print $cgi->header(
6490                         -type => 'text/plain',
6491                         -charset => 'utf-8',
6492                         -expires => $expires,
6493                         -content_disposition => 'inline; filename="' . "$file_name" . '.patch"');
6494
6495                 print "X-Git-Url: " . $cgi->self_url() . "\n\n";
6496
6497         } else {
6498                 die_error(400, "Unknown blobdiff format");
6499         }
6500
6501         # patch
6502         if ($format eq 'html') {
6503                 print "<div class=\"page_body\">\n";
6504
6505                 git_patchset_body($fd, [ \%diffinfo ], $hash_base, $hash_parent_base);
6506                 close $fd;
6507
6508                 print "</div>\n"; # class="page_body"
6509                 git_footer_html();
6510
6511         } else {
6512                 while (my $line = <$fd>) {
6513                         $line =~ s!a/($hash|$hash_parent)!'a/'.esc_path($diffinfo{'from_file'})!eg;
6514                         $line =~ s!b/($hash|$hash_parent)!'b/'.esc_path($diffinfo{'to_file'})!eg;
6515
6516                         print $line;
6517
6518                         last if $line =~ m!^\+\+\+!;
6519                 }
6520                 local $/ = undef;
6521                 print <$fd>;
6522                 close $fd;
6523         }
6524 }
6525
6526 sub git_blobdiff_plain {
6527         git_blobdiff('plain');
6528 }
6529
6530 sub git_commitdiff {
6531         my %params = @_;
6532         my $format = $params{-format} || 'html';
6533
6534         my ($patch_max) = gitweb_get_feature('patches');
6535         if ($format eq 'patch') {
6536                 die_error(403, "Patch view not allowed") unless $patch_max;
6537         }
6538
6539         $hash ||= $hash_base || "HEAD";
6540         my %co = parse_commit($hash)
6541             or die_error(404, "Unknown commit object");
6542
6543         # choose format for commitdiff for merge
6544         if (! defined $hash_parent && @{$co{'parents'}} > 1) {
6545                 $hash_parent = '--cc';
6546         }
6547         # we need to prepare $formats_nav before almost any parameter munging
6548         my $formats_nav;
6549         if ($format eq 'html') {
6550                 $formats_nav =
6551                         $cgi->a({-href => href(action=>"commitdiff_plain", -replay=>1)},
6552                                 "raw");
6553                 if ($patch_max && @{$co{'parents'}} <= 1) {
6554                         $formats_nav .= " | " .
6555                                 $cgi->a({-href => href(action=>"patch", -replay=>1)},
6556                                         "patch");
6557                 }
6558
6559                 if (defined $hash_parent &&
6560                     $hash_parent ne '-c' && $hash_parent ne '--cc') {
6561                         # commitdiff with two commits given
6562                         my $hash_parent_short = $hash_parent;
6563                         if ($hash_parent =~ m/^[0-9a-fA-F]{40}$/) {
6564                                 $hash_parent_short = substr($hash_parent, 0, 7);
6565                         }
6566                         $formats_nav .=
6567                                 ' (from';
6568                         for (my $i = 0; $i < @{$co{'parents'}}; $i++) {
6569                                 if ($co{'parents'}[$i] eq $hash_parent) {
6570                                         $formats_nav .= ' parent ' . ($i+1);
6571                                         last;
6572                                 }
6573                         }
6574                         $formats_nav .= ': ' .
6575                                 $cgi->a({-href => href(action=>"commitdiff",
6576                                                        hash=>$hash_parent)},
6577                                         esc_html($hash_parent_short)) .
6578                                 ')';
6579                 } elsif (!$co{'parent'}) {
6580                         # --root commitdiff
6581                         $formats_nav .= ' (initial)';
6582                 } elsif (scalar @{$co{'parents'}} == 1) {
6583                         # single parent commit
6584                         $formats_nav .=
6585                                 ' (parent: ' .
6586                                 $cgi->a({-href => href(action=>"commitdiff",
6587                                                        hash=>$co{'parent'})},
6588                                         esc_html(substr($co{'parent'}, 0, 7))) .
6589                                 ')';
6590                 } else {
6591                         # merge commit
6592                         if ($hash_parent eq '--cc') {
6593                                 $formats_nav .= ' | ' .
6594                                         $cgi->a({-href => href(action=>"commitdiff",
6595                                                                hash=>$hash, hash_parent=>'-c')},
6596                                                 'combined');
6597                         } else { # $hash_parent eq '-c'
6598                                 $formats_nav .= ' | ' .
6599                                         $cgi->a({-href => href(action=>"commitdiff",
6600                                                                hash=>$hash, hash_parent=>'--cc')},
6601                                                 'compact');
6602                         }
6603                         $formats_nav .=
6604                                 ' (merge: ' .
6605                                 join(' ', map {
6606                                         $cgi->a({-href => href(action=>"commitdiff",
6607                                                                hash=>$_)},
6608                                                 esc_html(substr($_, 0, 7)));
6609                                 } @{$co{'parents'}} ) .
6610                                 ')';
6611                 }
6612         }
6613
6614         my $hash_parent_param = $hash_parent;
6615         if (!defined $hash_parent_param) {
6616                 # --cc for multiple parents, --root for parentless
6617                 $hash_parent_param =
6618                         @{$co{'parents'}} > 1 ? '--cc' : $co{'parent'} || '--root';
6619         }
6620
6621         # read commitdiff
6622         my $fd;
6623         my @difftree;
6624         if ($format eq 'html') {
6625                 open $fd, "-|", git_cmd(), "diff-tree", '-r', @diff_opts,
6626                         "--no-commit-id", "--patch-with-raw", "--full-index",
6627                         $hash_parent_param, $hash, "--"
6628                         or die_error(500, "Open git-diff-tree failed");
6629
6630                 while (my $line = <$fd>) {
6631                         chomp $line;
6632                         # empty line ends raw part of diff-tree output
6633                         last unless $line;
6634                         push @difftree, scalar parse_difftree_raw_line($line);
6635                 }
6636
6637         } elsif ($format eq 'plain') {
6638                 open $fd, "-|", git_cmd(), "diff-tree", '-r', @diff_opts,
6639                         '-p', $hash_parent_param, $hash, "--"
6640                         or die_error(500, "Open git-diff-tree failed");
6641         } elsif ($format eq 'patch') {
6642                 # For commit ranges, we limit the output to the number of
6643                 # patches specified in the 'patches' feature.
6644                 # For single commits, we limit the output to a single patch,
6645                 # diverging from the git-format-patch default.
6646                 my @commit_spec = ();
6647                 if ($hash_parent) {
6648                         if ($patch_max > 0) {
6649                                 push @commit_spec, "-$patch_max";
6650                         }
6651                         push @commit_spec, '-n', "$hash_parent..$hash";
6652                 } else {
6653                         if ($params{-single}) {
6654                                 push @commit_spec, '-1';
6655                         } else {
6656                                 if ($patch_max > 0) {
6657                                         push @commit_spec, "-$patch_max";
6658                                 }
6659                                 push @commit_spec, "-n";
6660                         }
6661                         push @commit_spec, '--root', $hash;
6662                 }
6663                 open $fd, "-|", git_cmd(), "format-patch", @diff_opts,
6664                         '--encoding=utf8', '--stdout', @commit_spec
6665                         or die_error(500, "Open git-format-patch failed");
6666         } else {
6667                 die_error(400, "Unknown commitdiff format");
6668         }
6669
6670         # non-textual hash id's can be cached
6671         my $expires;
6672         if ($hash =~ m/^[0-9a-fA-F]{40}$/) {
6673                 $expires = "+1d";
6674         }
6675
6676         # write commit message
6677         if ($format eq 'html') {
6678                 my $refs = git_get_references();
6679                 my $ref = format_ref_marker($refs, $co{'id'});
6680
6681                 git_header_html(undef, $expires);
6682                 git_print_page_nav('commitdiff','', $hash,$co{'tree'},$hash, $formats_nav);
6683                 git_print_header_div('commit', esc_html($co{'title'}) . $ref, $hash);
6684                 print "<div class=\"title_text\">\n" .
6685                       "<table class=\"object_header\">\n";
6686                 git_print_authorship_rows(\%co);
6687                 print "</table>".
6688                       "</div>\n";
6689                 print "<div class=\"page_body\">\n";
6690                 if (@{$co{'comment'}} > 1) {
6691                         print "<div class=\"log\">\n";
6692                         git_print_log($co{'comment'}, -final_empty_line=> 1, -remove_title => 1);
6693                         print "</div>\n"; # class="log"
6694                 }
6695
6696         } elsif ($format eq 'plain') {
6697                 my $refs = git_get_references("tags");
6698                 my $tagname = git_get_rev_name_tags($hash);
6699                 my $filename = basename($project) . "-$hash.patch";
6700
6701                 print $cgi->header(
6702                         -type => 'text/plain',
6703                         -charset => 'utf-8',
6704                         -expires => $expires,
6705                         -content_disposition => 'inline; filename="' . "$filename" . '"');
6706                 my %ad = parse_date($co{'author_epoch'}, $co{'author_tz'});
6707                 print "From: " . to_utf8($co{'author'}) . "\n";
6708                 print "Date: $ad{'rfc2822'} ($ad{'tz_local'})\n";
6709                 print "Subject: " . to_utf8($co{'title'}) . "\n";
6710
6711                 print "X-Git-Tag: $tagname\n" if $tagname;
6712                 print "X-Git-Url: " . $cgi->self_url() . "\n\n";
6713
6714                 foreach my $line (@{$co{'comment'}}) {
6715                         print to_utf8($line) . "\n";
6716                 }
6717                 print "---\n\n";
6718         } elsif ($format eq 'patch') {
6719                 my $filename = basename($project) . "-$hash.patch";
6720
6721                 print $cgi->header(
6722                         -type => 'text/plain',
6723                         -charset => 'utf-8',
6724                         -expires => $expires,
6725                         -content_disposition => 'inline; filename="' . "$filename" . '"');
6726         }
6727
6728         # write patch
6729         if ($format eq 'html') {
6730                 my $use_parents = !defined $hash_parent ||
6731                         $hash_parent eq '-c' || $hash_parent eq '--cc';
6732                 git_difftree_body(\@difftree, $hash,
6733                                   $use_parents ? @{$co{'parents'}} : $hash_parent);
6734                 print "<br/>\n";
6735
6736                 git_patchset_body($fd, \@difftree, $hash,
6737                                   $use_parents ? @{$co{'parents'}} : $hash_parent);
6738                 close $fd;
6739                 print "</div>\n"; # class="page_body"
6740                 git_footer_html();
6741
6742         } elsif ($format eq 'plain') {
6743                 local $/ = undef;
6744                 print <$fd>;
6745                 close $fd
6746                         or print "Reading git-diff-tree failed\n";
6747         } elsif ($format eq 'patch') {
6748                 local $/ = undef;
6749                 print <$fd>;
6750                 close $fd
6751                         or print "Reading git-format-patch failed\n";
6752         }
6753 }
6754
6755 sub git_commitdiff_plain {
6756         git_commitdiff(-format => 'plain');
6757 }
6758
6759 # format-patch-style patches
6760 sub git_patch {
6761         git_commitdiff(-format => 'patch', -single => 1);
6762 }
6763
6764 sub git_patches {
6765         git_commitdiff(-format => 'patch');
6766 }
6767
6768 sub git_history {
6769         git_log_generic('history', \&git_history_body,
6770                         $hash_base, $hash_parent_base,
6771                         $file_name, $hash);
6772 }
6773
6774 sub git_search {
6775         gitweb_check_feature('search') or die_error(403, "Search is disabled");
6776         if (!defined $searchtext) {
6777                 die_error(400, "Text field is empty");
6778         }
6779         if (!defined $hash) {
6780                 $hash = git_get_head_hash($project);
6781         }
6782         my %co = parse_commit($hash);
6783         if (!%co) {
6784                 die_error(404, "Unknown commit object");
6785         }
6786         if (!defined $page) {
6787                 $page = 0;
6788         }
6789
6790         $searchtype ||= 'commit';
6791         if ($searchtype eq 'pickaxe') {
6792                 # pickaxe may take all resources of your box and run for several minutes
6793                 # with every query - so decide by yourself how public you make this feature
6794                 gitweb_check_feature('pickaxe')
6795                     or die_error(403, "Pickaxe is disabled");
6796         }
6797         if ($searchtype eq 'grep') {
6798                 gitweb_check_feature('grep')
6799                     or die_error(403, "Grep is disabled");
6800         }
6801
6802         git_header_html();
6803
6804         if ($searchtype eq 'commit' or $searchtype eq 'author' or $searchtype eq 'committer') {
6805                 my $greptype;
6806                 if ($searchtype eq 'commit') {
6807                         $greptype = "--grep=";
6808                 } elsif ($searchtype eq 'author') {
6809                         $greptype = "--author=";
6810                 } elsif ($searchtype eq 'committer') {
6811                         $greptype = "--committer=";
6812                 }
6813                 $greptype .= $searchtext;
6814                 my @commitlist = parse_commits($hash, 101, (100 * $page), undef,
6815                                                $greptype, '--regexp-ignore-case',
6816                                                $search_use_regexp ? '--extended-regexp' : '--fixed-strings');
6817
6818                 my $paging_nav = '';
6819                 if ($page > 0) {
6820                         $paging_nav .=
6821                                 $cgi->a({-href => href(action=>"search", hash=>$hash,
6822                                                        searchtext=>$searchtext,
6823                                                        searchtype=>$searchtype)},
6824                                         "first");
6825                         $paging_nav .= " &sdot; " .
6826                                 $cgi->a({-href => href(-replay=>1, page=>$page-1),
6827                                          -accesskey => "p", -title => "Alt-p"}, "prev");
6828                 } else {
6829                         $paging_nav .= "first";
6830                         $paging_nav .= " &sdot; prev";
6831                 }
6832                 my $next_link = '';
6833                 if ($#commitlist >= 100) {
6834                         $next_link =
6835                                 $cgi->a({-href => href(-replay=>1, page=>$page+1),
6836                                          -accesskey => "n", -title => "Alt-n"}, "next");
6837                         $paging_nav .= " &sdot; $next_link";
6838                 } else {
6839                         $paging_nav .= " &sdot; next";
6840                 }
6841
6842                 git_print_page_nav('','', $hash,$co{'tree'},$hash, $paging_nav);
6843                 git_print_header_div('commit', esc_html($co{'title'}), $hash);
6844                 if ($page == 0 && !@commitlist) {
6845                         print "<p>No match.</p>\n";
6846                 } else {
6847                         git_search_grep_body(\@commitlist, 0, 99, $next_link);
6848                 }
6849         }
6850
6851         if ($searchtype eq 'pickaxe') {
6852                 git_print_page_nav('','', $hash,$co{'tree'},$hash);
6853                 git_print_header_div('commit', esc_html($co{'title'}), $hash);
6854
6855                 print "<table class=\"pickaxe search\">\n";
6856                 my $alternate = 1;
6857                 local $/ = "\n";
6858                 open my $fd, '-|', git_cmd(), '--no-pager', 'log', @diff_opts,
6859                         '--pretty=format:%H', '--no-abbrev', '--raw', "-S$searchtext",
6860                         ($search_use_regexp ? '--pickaxe-regex' : ());
6861                 undef %co;
6862                 my @files;
6863                 while (my $line = <$fd>) {
6864                         chomp $line;
6865                         next unless $line;
6866
6867                         my %set = parse_difftree_raw_line($line);
6868                         if (defined $set{'commit'}) {
6869                                 # finish previous commit
6870                                 if (%co) {
6871                                         print "</td>\n" .
6872                                               "<td class=\"link\">" .
6873                                               $cgi->a({-href => href(action=>"commit", hash=>$co{'id'})}, "commit") .
6874                                               " | " .
6875                                               $cgi->a({-href => href(action=>"tree", hash=>$co{'tree'}, hash_base=>$co{'id'})}, "tree");
6876                                         print "</td>\n" .
6877                                               "</tr>\n";
6878                                 }
6879
6880                                 if ($alternate) {
6881                                         print "<tr class=\"dark\">\n";
6882                                 } else {
6883                                         print "<tr class=\"light\">\n";
6884                                 }
6885                                 $alternate ^= 1;
6886                                 %co = parse_commit($set{'commit'});
6887                                 my $author = chop_and_escape_str($co{'author_name'}, 15, 5);
6888                                 print "<td title=\"$co{'age_string_age'}\"><i>$co{'age_string_date'}</i></td>\n" .
6889                                       "<td><i>$author</i></td>\n" .
6890                                       "<td>" .
6891                                       $cgi->a({-href => href(action=>"commit", hash=>$co{'id'}),
6892                                               -class => "list subject"},
6893                                               chop_and_escape_str($co{'title'}, 50) . "<br/>");
6894                         } elsif (defined $set{'to_id'}) {
6895                                 next if ($set{'to_id'} =~ m/^0{40}$/);
6896
6897                                 print $cgi->a({-href => href(action=>"blob", hash_base=>$co{'id'},
6898                                                              hash=>$set{'to_id'}, file_name=>$set{'to_file'}),
6899                                               -class => "list"},
6900                                               "<span class=\"match\">" . esc_path($set{'file'}) . "</span>") .
6901                                       "<br/>\n";
6902                         }
6903                 }
6904                 close $fd;
6905
6906                 # finish last commit (warning: repetition!)
6907                 if (%co) {
6908                         print "</td>\n" .
6909                               "<td class=\"link\">" .
6910                               $cgi->a({-href => href(action=>"commit", hash=>$co{'id'})}, "commit") .
6911                               " | " .
6912                               $cgi->a({-href => href(action=>"tree", hash=>$co{'tree'}, hash_base=>$co{'id'})}, "tree");
6913                         print "</td>\n" .
6914                               "</tr>\n";
6915                 }
6916
6917                 print "</table>\n";
6918         }
6919
6920         if ($searchtype eq 'grep') {
6921                 git_print_page_nav('','', $hash,$co{'tree'},$hash);
6922                 git_print_header_div('commit', esc_html($co{'title'}), $hash);
6923
6924                 print "<table class=\"grep_search\">\n";
6925                 my $alternate = 1;
6926                 my $matches = 0;
6927                 local $/ = "\n";
6928                 open my $fd, "-|", git_cmd(), 'grep', '-n',
6929                         $search_use_regexp ? ('-E', '-i') : '-F',
6930                         $searchtext, $co{'tree'};
6931                 my $lastfile = '';
6932                 while (my $line = <$fd>) {
6933                         chomp $line;
6934                         my ($file, $lno, $ltext, $binary);
6935                         last if ($matches++ > 1000);
6936                         if ($line =~ /^Binary file (.+) matches$/) {
6937                                 $file = $1;
6938                                 $binary = 1;
6939                         } else {
6940                                 (undef, $file, $lno, $ltext) = split(/:/, $line, 4);
6941                         }
6942                         if ($file ne $lastfile) {
6943                                 $lastfile and print "</td></tr>\n";
6944                                 if ($alternate++) {
6945                                         print "<tr class=\"dark\">\n";
6946                                 } else {
6947                                         print "<tr class=\"light\">\n";
6948                                 }
6949                                 print "<td class=\"list\">".
6950                                         $cgi->a({-href => href(action=>"blob", hash=>$co{'hash'},
6951                                                                file_name=>"$file"),
6952                                                 -class => "list"}, esc_path($file));
6953                                 print "</td><td>\n";
6954                                 $lastfile = $file;
6955                         }
6956                         if ($binary) {
6957                                 print "<div class=\"binary\">Binary file</div>\n";
6958                         } else {
6959                                 $ltext = untabify($ltext);
6960                                 if ($ltext =~ m/^(.*)($search_regexp)(.*)$/i) {
6961                                         $ltext = esc_html($1, -nbsp=>1);
6962                                         $ltext .= '<span class="match">';
6963                                         $ltext .= esc_html($2, -nbsp=>1);
6964                                         $ltext .= '</span>';
6965                                         $ltext .= esc_html($3, -nbsp=>1);
6966                                 } else {
6967                                         $ltext = esc_html($ltext, -nbsp=>1);
6968                                 }
6969                                 print "<div class=\"pre\">" .
6970                                         $cgi->a({-href => href(action=>"blob", hash=>$co{'hash'},
6971                                                                file_name=>"$file").'#l'.$lno,
6972                                                 -class => "linenr"}, sprintf('%4i', $lno))
6973                                         . ' ' .  $ltext . "</div>\n";
6974                         }
6975                 }
6976                 if ($lastfile) {
6977                         print "</td></tr>\n";
6978                         if ($matches > 1000) {
6979                                 print "<div class=\"diff nodifferences\">Too many matches, listing trimmed</div>\n";
6980                         }
6981                 } else {
6982                         print "<div class=\"diff nodifferences\">No matches found</div>\n";
6983                 }
6984                 close $fd;
6985
6986                 print "</table>\n";
6987         }
6988         git_footer_html();
6989 }
6990
6991 sub git_search_help {
6992         git_header_html();
6993         git_print_page_nav('','', $hash,$hash,$hash);
6994         print <<EOT;
6995 <p><strong>Pattern</strong> is by default a normal string that is matched precisely (but without
6996 regard to case, except in the case of pickaxe). However, when you check the <em>re</em> checkbox,
6997 the pattern entered is recognized as the POSIX extended
6998 <a href="http://en.wikipedia.org/wiki/Regular_expression">regular expression</a> (also case
6999 insensitive).</p>
7000 <dl>
7001 <dt><b>commit</b></dt>
7002 <dd>The commit messages and authorship information will be scanned for the given pattern.</dd>
7003 EOT
7004         my $have_grep = gitweb_check_feature('grep');
7005         if ($have_grep) {
7006                 print <<EOT;
7007 <dt><b>grep</b></dt>
7008 <dd>All files in the currently selected tree (HEAD unless you are explicitly browsing
7009     a different one) are searched for the given pattern. On large trees, this search can take
7010 a while and put some strain on the server, so please use it with some consideration. Note that
7011 due to git-grep peculiarity, currently if regexp mode is turned off, the matches are
7012 case-sensitive.</dd>
7013 EOT
7014         }
7015         print <<EOT;
7016 <dt><b>author</b></dt>
7017 <dd>Name and e-mail of the change author and date of birth of the patch will be scanned for the given pattern.</dd>
7018 <dt><b>committer</b></dt>
7019 <dd>Name and e-mail of the committer and date of commit will be scanned for the given pattern.</dd>
7020 EOT
7021         my $have_pickaxe = gitweb_check_feature('pickaxe');
7022         if ($have_pickaxe) {
7023                 print <<EOT;
7024 <dt><b>pickaxe</b></dt>
7025 <dd>All commits that caused the string to appear or disappear from any file (changes that
7026 added, removed or "modified" the string) will be listed. This search can take a while and
7027 takes a lot of strain on the server, so please use it wisely. Note that since you may be
7028 interested even in changes just changing the case as well, this search is case sensitive.</dd>
7029 EOT
7030         }
7031         print "</dl>\n";
7032         git_footer_html();
7033 }
7034
7035 sub git_shortlog {
7036         git_log_generic('shortlog', \&git_shortlog_body,
7037                         $hash, $hash_parent);
7038 }
7039
7040 ## ......................................................................
7041 ## feeds (RSS, Atom; OPML)
7042
7043 sub git_feed {
7044         my $format = shift || 'atom';
7045         my $have_blame = gitweb_check_feature('blame');
7046
7047         # Atom: http://www.atomenabled.org/developers/syndication/
7048         # RSS:  http://www.notestips.com/80256B3A007F2692/1/NAMO5P9UPQ
7049         if ($format ne 'rss' && $format ne 'atom') {
7050                 die_error(400, "Unknown web feed format");
7051         }
7052
7053         # log/feed of current (HEAD) branch, log of given branch, history of file/directory
7054         my $head = $hash || 'HEAD';
7055         my @commitlist = parse_commits($head, 150, 0, $file_name);
7056
7057         my %latest_commit;
7058         my %latest_date;
7059         my $content_type = "application/$format+xml";
7060         if (defined $cgi->http('HTTP_ACCEPT') &&
7061                  $cgi->Accept('text/xml') > $cgi->Accept($content_type)) {
7062                 # browser (feed reader) prefers text/xml
7063                 $content_type = 'text/xml';
7064         }
7065         if (defined($commitlist[0])) {
7066                 %latest_commit = %{$commitlist[0]};
7067                 my $latest_epoch = $latest_commit{'committer_epoch'};
7068                 %latest_date   = parse_date($latest_epoch, $latest_commit{'comitter_tz'});
7069                 my $if_modified = $cgi->http('IF_MODIFIED_SINCE');
7070                 if (defined $if_modified) {
7071                         my $since;
7072                         if (eval { require HTTP::Date; 1; }) {
7073                                 $since = HTTP::Date::str2time($if_modified);
7074                         } elsif (eval { require Time::ParseDate; 1; }) {
7075                                 $since = Time::ParseDate::parsedate($if_modified, GMT => 1);
7076                         }
7077                         if (defined $since && $latest_epoch <= $since) {
7078                                 print $cgi->header(
7079                                         -type => $content_type,
7080                                         -charset => 'utf-8',
7081                                         -last_modified => $latest_date{'rfc2822'},
7082                                         -status => '304 Not Modified');
7083                                 return;
7084                         }
7085                 }
7086                 print $cgi->header(
7087                         -type => $content_type,
7088                         -charset => 'utf-8',
7089                         -last_modified => $latest_date{'rfc2822'});
7090         } else {
7091                 print $cgi->header(
7092                         -type => $content_type,
7093                         -charset => 'utf-8');
7094         }
7095
7096         # Optimization: skip generating the body if client asks only
7097         # for Last-Modified date.
7098         return if ($cgi->request_method() eq 'HEAD');
7099
7100         # header variables
7101         my $title = "$site_name - $project/$action";
7102         my $feed_type = 'log';
7103         if (defined $hash) {
7104                 $title .= " - '$hash'";
7105                 $feed_type = 'branch log';
7106                 if (defined $file_name) {
7107                         $title .= " :: $file_name";
7108                         $feed_type = 'history';
7109                 }
7110         } elsif (defined $file_name) {
7111                 $title .= " - $file_name";
7112                 $feed_type = 'history';
7113         }
7114         $title .= " $feed_type";
7115         my $descr = git_get_project_description($project);
7116         if (defined $descr) {
7117                 $descr = esc_html($descr);
7118         } else {
7119                 $descr = "$project " .
7120                          ($format eq 'rss' ? 'RSS' : 'Atom') .
7121                          " feed";
7122         }
7123         my $owner = git_get_project_owner($project);
7124         $owner = esc_html($owner);
7125
7126         #header
7127         my $alt_url;
7128         if (defined $file_name) {
7129                 $alt_url = href(-full=>1, action=>"history", hash=>$hash, file_name=>$file_name);
7130         } elsif (defined $hash) {
7131                 $alt_url = href(-full=>1, action=>"log", hash=>$hash);
7132         } else {
7133                 $alt_url = href(-full=>1, action=>"summary");
7134         }
7135         print qq!<?xml version="1.0" encoding="utf-8"?>\n!;
7136         if ($format eq 'rss') {
7137                 print <<XML;
7138 <rss version="2.0" xmlns:content="http://purl.org/rss/1.0/modules/content/">
7139 <channel>
7140 XML
7141                 print "<title>$title</title>\n" .
7142                       "<link>$alt_url</link>\n" .
7143                       "<description>$descr</description>\n" .
7144                       "<language>en</language>\n" .
7145                       # project owner is responsible for 'editorial' content
7146                       "<managingEditor>$owner</managingEditor>\n";
7147                 if (defined $logo || defined $favicon) {
7148                         # prefer the logo to the favicon, since RSS
7149                         # doesn't allow both
7150                         my $img = esc_url($logo || $favicon);
7151                         print "<image>\n" .
7152                               "<url>$img</url>\n" .
7153                               "<title>$title</title>\n" .
7154                               "<link>$alt_url</link>\n" .
7155                               "</image>\n";
7156                 }
7157                 if (%latest_date) {
7158                         print "<pubDate>$latest_date{'rfc2822'}</pubDate>\n";
7159                         print "<lastBuildDate>$latest_date{'rfc2822'}</lastBuildDate>\n";
7160                 }
7161                 print "<generator>gitweb v.$version/$git_version</generator>\n";
7162         } elsif ($format eq 'atom') {
7163                 print <<XML;
7164 <feed xmlns="http://www.w3.org/2005/Atom">
7165 XML
7166                 print "<title>$title</title>\n" .
7167                       "<subtitle>$descr</subtitle>\n" .
7168                       '<link rel="alternate" type="text/html" href="' .
7169                       $alt_url . '" />' . "\n" .
7170                       '<link rel="self" type="' . $content_type . '" href="' .
7171                       $cgi->self_url() . '" />' . "\n" .
7172                       "<id>" . href(-full=>1) . "</id>\n" .
7173                       # use project owner for feed author
7174                       "<author><name>$owner</name></author>\n";
7175                 if (defined $favicon) {
7176                         print "<icon>" . esc_url($favicon) . "</icon>\n";
7177                 }
7178                 if (defined $logo) {
7179                         # not twice as wide as tall: 72 x 27 pixels
7180                         print "<logo>" . esc_url($logo) . "</logo>\n";
7181                 }
7182                 if (! %latest_date) {
7183                         # dummy date to keep the feed valid until commits trickle in:
7184                         print "<updated>1970-01-01T00:00:00Z</updated>\n";
7185                 } else {
7186                         print "<updated>$latest_date{'iso-8601'}</updated>\n";
7187                 }
7188                 print "<generator version='$version/$git_version'>gitweb</generator>\n";
7189         }
7190
7191         # contents
7192         for (my $i = 0; $i <= $#commitlist; $i++) {
7193                 my %co = %{$commitlist[$i]};
7194                 my $commit = $co{'id'};
7195                 # we read 150, we always show 30 and the ones more recent than 48 hours
7196                 if (($i >= 20) && ((time - $co{'author_epoch'}) > 48*60*60)) {
7197                         last;
7198                 }
7199                 my %cd = parse_date($co{'author_epoch'}, $co{'author_tz'});
7200
7201                 # get list of changed files
7202                 open my $fd, "-|", git_cmd(), "diff-tree", '-r', @diff_opts,
7203                         $co{'parent'} || "--root",
7204                         $co{'id'}, "--", (defined $file_name ? $file_name : ())
7205                         or next;
7206                 my @difftree = map { chomp; $_ } <$fd>;
7207                 close $fd
7208                         or next;
7209
7210                 # print element (entry, item)
7211                 my $co_url = href(-full=>1, action=>"commitdiff", hash=>$commit);
7212                 if ($format eq 'rss') {
7213                         print "<item>\n" .
7214                               "<title>" . esc_html($co{'title'}) . "</title>\n" .
7215                               "<author>" . esc_html($co{'author'}) . "</author>\n" .
7216                               "<pubDate>$cd{'rfc2822'}</pubDate>\n" .
7217                               "<guid isPermaLink=\"true\">$co_url</guid>\n" .
7218                               "<link>$co_url</link>\n" .
7219                               "<description>" . esc_html($co{'title'}) . "</description>\n" .
7220                               "<content:encoded>" .
7221                               "<![CDATA[\n";
7222                 } elsif ($format eq 'atom') {
7223                         print "<entry>\n" .
7224                               "<title type=\"html\">" . esc_html($co{'title'}) . "</title>\n" .
7225                               "<updated>$cd{'iso-8601'}</updated>\n" .
7226                               "<author>\n" .
7227                               "  <name>" . esc_html($co{'author_name'}) . "</name>\n";
7228                         if ($co{'author_email'}) {
7229                                 print "  <email>" . esc_html($co{'author_email'}) . "</email>\n";
7230                         }
7231                         print "</author>\n" .
7232                               # use committer for contributor
7233                               "<contributor>\n" .
7234                               "  <name>" . esc_html($co{'committer_name'}) . "</name>\n";
7235                         if ($co{'committer_email'}) {
7236                                 print "  <email>" . esc_html($co{'committer_email'}) . "</email>\n";
7237                         }
7238                         print "</contributor>\n" .
7239                               "<published>$cd{'iso-8601'}</published>\n" .
7240                               "<link rel=\"alternate\" type=\"text/html\" href=\"$co_url\" />\n" .
7241                               "<id>$co_url</id>\n" .
7242                               "<content type=\"xhtml\" xml:base=\"" . esc_url($my_url) . "\">\n" .
7243                               "<div xmlns=\"http://www.w3.org/1999/xhtml\">\n";
7244                 }
7245                 my $comment = $co{'comment'};
7246                 print "<pre>\n";
7247                 foreach my $line (@$comment) {
7248                         $line = esc_html($line);
7249                         print "$line\n";
7250                 }
7251                 print "</pre><ul>\n";
7252                 foreach my $difftree_line (@difftree) {
7253                         my %difftree = parse_difftree_raw_line($difftree_line);
7254                         next if !$difftree{'from_id'};
7255
7256                         my $file = $difftree{'file'} || $difftree{'to_file'};
7257
7258                         print "<li>" .
7259                               "[" .
7260                               $cgi->a({-href => href(-full=>1, action=>"blobdiff",
7261                                                      hash=>$difftree{'to_id'}, hash_parent=>$difftree{'from_id'},
7262                                                      hash_base=>$co{'id'}, hash_parent_base=>$co{'parent'},
7263                                                      file_name=>$file, file_parent=>$difftree{'from_file'}),
7264                                       -title => "diff"}, 'D');
7265                         if ($have_blame) {
7266                                 print $cgi->a({-href => href(-full=>1, action=>"blame",
7267                                                              file_name=>$file, hash_base=>$commit),
7268                                               -title => "blame"}, 'B');
7269                         }
7270                         # if this is not a feed of a file history
7271                         if (!defined $file_name || $file_name ne $file) {
7272                                 print $cgi->a({-href => href(-full=>1, action=>"history",
7273                                                              file_name=>$file, hash=>$commit),
7274                                               -title => "history"}, 'H');
7275                         }
7276                         $file = esc_path($file);
7277                         print "] ".
7278                               "$file</li>\n";
7279                 }
7280                 if ($format eq 'rss') {
7281                         print "</ul>]]>\n" .
7282                               "</content:encoded>\n" .
7283                               "</item>\n";
7284                 } elsif ($format eq 'atom') {
7285                         print "</ul>\n</div>\n" .
7286                               "</content>\n" .
7287                               "</entry>\n";
7288                 }
7289         }
7290
7291         # end of feed
7292         if ($format eq 'rss') {
7293                 print "</channel>\n</rss>\n";
7294         } elsif ($format eq 'atom') {
7295                 print "</feed>\n";
7296         }
7297 }
7298
7299 sub git_rss {
7300         git_feed('rss');
7301 }
7302
7303 sub git_atom {
7304         git_feed('atom');
7305 }
7306
7307 sub git_opml {
7308         my @list = git_get_projects_list();
7309
7310         print $cgi->header(
7311                 -type => 'text/xml',
7312                 -charset => 'utf-8',
7313                 -content_disposition => 'inline; filename="opml.xml"');
7314
7315         print <<XML;
7316 <?xml version="1.0" encoding="utf-8"?>
7317 <opml version="1.0">
7318 <head>
7319   <title>$site_name OPML Export</title>
7320 </head>
7321 <body>
7322 <outline text="git RSS feeds">
7323 XML
7324
7325         foreach my $pr (@list) {
7326                 my %proj = %$pr;
7327                 my $head = git_get_head_hash($proj{'path'});
7328                 if (!defined $head) {
7329                         next;
7330                 }
7331                 $git_dir = "$projectroot/$proj{'path'}";
7332                 my %co = parse_commit($head);
7333                 if (!%co) {
7334                         next;
7335                 }
7336
7337                 my $path = esc_html(chop_str($proj{'path'}, 25, 5));
7338                 my $rss  = href('project' => $proj{'path'}, 'action' => 'rss', -full => 1);
7339                 my $html = href('project' => $proj{'path'}, 'action' => 'summary', -full => 1);
7340                 print "<outline type=\"rss\" text=\"$path\" title=\"$path\" xmlUrl=\"$rss\" htmlUrl=\"$html\"/>\n";
7341         }
7342         print <<XML;
7343 </outline>
7344 </body>
7345 </opml>
7346 XML
7347 }