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 # -anchor => ANCHOR - add #ANCHOR to end of URL, implies -replay if used alone
1203 sub href {
1204         my %params = @_;
1205         # default is to use -absolute url() i.e. $my_uri
1206         my $href = $params{-full} ? $my_url : $my_uri;
1207
1208         # implicit -replay, must be first of implicit params
1209         $params{-replay} = 1 if (keys %params == 1 && $params{-anchor});
1210
1211         $params{'project'} = $project unless exists $params{'project'};
1212
1213         if ($params{-replay}) {
1214                 while (my ($name, $symbol) = each %cgi_param_mapping) {
1215                         if (!exists $params{$name}) {
1216                                 $params{$name} = $input_params{$name};
1217                         }
1218                 }
1219         }
1220
1221         my $use_pathinfo = gitweb_check_feature('pathinfo');
1222         if (defined $params{'project'} &&
1223             (exists $params{-path_info} ? $params{-path_info} : $use_pathinfo)) {
1224                 # try to put as many parameters as possible in PATH_INFO:
1225                 #   - project name
1226                 #   - action
1227                 #   - hash_parent or hash_parent_base:/file_parent
1228                 #   - hash or hash_base:/filename
1229                 #   - the snapshot_format as an appropriate suffix
1230
1231                 # When the script is the root DirectoryIndex for the domain,
1232                 # $href here would be something like http://gitweb.example.com/
1233                 # Thus, we strip any trailing / from $href, to spare us double
1234                 # slashes in the final URL
1235                 $href =~ s,/$,,;
1236
1237                 # Then add the project name, if present
1238                 $href .= "/".esc_path_info($params{'project'});
1239                 delete $params{'project'};
1240
1241                 # since we destructively absorb parameters, we keep this
1242                 # boolean that remembers if we're handling a snapshot
1243                 my $is_snapshot = $params{'action'} eq 'snapshot';
1244
1245                 # Summary just uses the project path URL, any other action is
1246                 # added to the URL
1247                 if (defined $params{'action'}) {
1248                         $href .= "/".esc_path_info($params{'action'})
1249                                 unless $params{'action'} eq 'summary';
1250                         delete $params{'action'};
1251                 }
1252
1253                 # Next, we put hash_parent_base:/file_parent..hash_base:/file_name,
1254                 # stripping nonexistent or useless pieces
1255                 $href .= "/" if ($params{'hash_base'} || $params{'hash_parent_base'}
1256                         || $params{'hash_parent'} || $params{'hash'});
1257                 if (defined $params{'hash_base'}) {
1258                         if (defined $params{'hash_parent_base'}) {
1259                                 $href .= esc_path_info($params{'hash_parent_base'});
1260                                 # skip the file_parent if it's the same as the file_name
1261                                 if (defined $params{'file_parent'}) {
1262                                         if (defined $params{'file_name'} && $params{'file_parent'} eq $params{'file_name'}) {
1263                                                 delete $params{'file_parent'};
1264                                         } elsif ($params{'file_parent'} !~ /\.\./) {
1265                                                 $href .= ":/".esc_path_info($params{'file_parent'});
1266                                                 delete $params{'file_parent'};
1267                                         }
1268                                 }
1269                                 $href .= "..";
1270                                 delete $params{'hash_parent'};
1271                                 delete $params{'hash_parent_base'};
1272                         } elsif (defined $params{'hash_parent'}) {
1273                                 $href .= esc_path_info($params{'hash_parent'}). "..";
1274                                 delete $params{'hash_parent'};
1275                         }
1276
1277                         $href .= esc_path_info($params{'hash_base'});
1278                         if (defined $params{'file_name'} && $params{'file_name'} !~ /\.\./) {
1279                                 $href .= ":/".esc_path_info($params{'file_name'});
1280                                 delete $params{'file_name'};
1281                         }
1282                         delete $params{'hash'};
1283                         delete $params{'hash_base'};
1284                 } elsif (defined $params{'hash'}) {
1285                         $href .= esc_path_info($params{'hash'});
1286                         delete $params{'hash'};
1287                 }
1288
1289                 # If the action was a snapshot, we can absorb the
1290                 # snapshot_format parameter too
1291                 if ($is_snapshot) {
1292                         my $fmt = $params{'snapshot_format'};
1293                         # snapshot_format should always be defined when href()
1294                         # is called, but just in case some code forgets, we
1295                         # fall back to the default
1296                         $fmt ||= $snapshot_fmts[0];
1297                         $href .= $known_snapshot_formats{$fmt}{'suffix'};
1298                         delete $params{'snapshot_format'};
1299                 }
1300         }
1301
1302         # now encode the parameters explicitly
1303         my @result = ();
1304         for (my $i = 0; $i < @cgi_param_mapping; $i += 2) {
1305                 my ($name, $symbol) = ($cgi_param_mapping[$i], $cgi_param_mapping[$i+1]);
1306                 if (defined $params{$name}) {
1307                         if (ref($params{$name}) eq "ARRAY") {
1308                                 foreach my $par (@{$params{$name}}) {
1309                                         push @result, $symbol . "=" . esc_param($par);
1310                                 }
1311                         } else {
1312                                 push @result, $symbol . "=" . esc_param($params{$name});
1313                         }
1314                 }
1315         }
1316         $href .= "?" . join(';', @result) if scalar @result;
1317
1318         # final transformation: trailing spaces must be escaped (URI-encoded)
1319         $href =~ s/(\s+)$/CGI::escape($1)/e;
1320
1321         if ($params{-anchor}) {
1322                 $href .= "#".esc_param($params{-anchor});
1323         }
1324
1325         return $href;
1326 }
1327
1328
1329 ## ======================================================================
1330 ## validation, quoting/unquoting and escaping
1331
1332 sub validate_action {
1333         my $input = shift || return undef;
1334         return undef unless exists $actions{$input};
1335         return $input;
1336 }
1337
1338 sub validate_project {
1339         my $input = shift || return undef;
1340         if (!validate_pathname($input) ||
1341                 !(-d "$projectroot/$input") ||
1342                 !check_export_ok("$projectroot/$input") ||
1343                 ($strict_export && !project_in_list($input))) {
1344                 return undef;
1345         } else {
1346                 return $input;
1347         }
1348 }
1349
1350 sub validate_pathname {
1351         my $input = shift || return undef;
1352
1353         # no '.' or '..' as elements of path, i.e. no '.' nor '..'
1354         # at the beginning, at the end, and between slashes.
1355         # also this catches doubled slashes
1356         if ($input =~ m!(^|/)(|\.|\.\.)(/|$)!) {
1357                 return undef;
1358         }
1359         # no null characters
1360         if ($input =~ m!\0!) {
1361                 return undef;
1362         }
1363         return $input;
1364 }
1365
1366 sub validate_refname {
1367         my $input = shift || return undef;
1368
1369         # textual hashes are O.K.
1370         if ($input =~ m/^[0-9a-fA-F]{40}$/) {
1371                 return $input;
1372         }
1373         # it must be correct pathname
1374         $input = validate_pathname($input)
1375                 or return undef;
1376         # restrictions on ref name according to git-check-ref-format
1377         if ($input =~ m!(/\.|\.\.|[\000-\040\177 ~^:?*\[]|/$)!) {
1378                 return undef;
1379         }
1380         return $input;
1381 }
1382
1383 # decode sequences of octets in utf8 into Perl's internal form,
1384 # which is utf-8 with utf8 flag set if needed.  gitweb writes out
1385 # in utf-8 thanks to "binmode STDOUT, ':utf8'" at beginning
1386 sub to_utf8 {
1387         my $str = shift;
1388         return undef unless defined $str;
1389         if (utf8::valid($str)) {
1390                 utf8::decode($str);
1391                 return $str;
1392         } else {
1393                 return decode($fallback_encoding, $str, Encode::FB_DEFAULT);
1394         }
1395 }
1396
1397 # quote unsafe chars, but keep the slash, even when it's not
1398 # correct, but quoted slashes look too horrible in bookmarks
1399 sub esc_param {
1400         my $str = shift;
1401         return undef unless defined $str;
1402         $str =~ s/([^A-Za-z0-9\-_.~()\/:@ ]+)/CGI::escape($1)/eg;
1403         $str =~ s/ /\+/g;
1404         return $str;
1405 }
1406
1407 # the quoting rules for path_info fragment are slightly different
1408 sub esc_path_info {
1409         my $str = shift;
1410         return undef unless defined $str;
1411
1412         # path_info doesn't treat '+' as space (specially), but '?' must be escaped
1413         $str =~ s/([^A-Za-z0-9\-_.~();\/;:@&= +]+)/CGI::escape($1)/eg;
1414
1415         return $str;
1416 }
1417
1418 # quote unsafe chars in whole URL, so some characters cannot be quoted
1419 sub esc_url {
1420         my $str = shift;
1421         return undef unless defined $str;
1422         $str =~ s/([^A-Za-z0-9\-_.~();\/;?:@&= ]+)/CGI::escape($1)/eg;
1423         $str =~ s/ /\+/g;
1424         return $str;
1425 }
1426
1427 # quote unsafe characters in HTML attributes
1428 sub esc_attr {
1429
1430         # for XHTML conformance escaping '"' to '&quot;' is not enough
1431         return esc_html(@_);
1432 }
1433
1434 # replace invalid utf8 character with SUBSTITUTION sequence
1435 sub esc_html {
1436         my $str = shift;
1437         my %opts = @_;
1438
1439         return undef unless defined $str;
1440
1441         $str = to_utf8($str);
1442         $str = $cgi->escapeHTML($str);
1443         if ($opts{'-nbsp'}) {
1444                 $str =~ s/ /&nbsp;/g;
1445         }
1446         $str =~ s|([[:cntrl:]])|(($1 ne "\t") ? quot_cec($1) : $1)|eg;
1447         return $str;
1448 }
1449
1450 # quote control characters and escape filename to HTML
1451 sub esc_path {
1452         my $str = shift;
1453         my %opts = @_;
1454
1455         return undef unless defined $str;
1456
1457         $str = to_utf8($str);
1458         $str = $cgi->escapeHTML($str);
1459         if ($opts{'-nbsp'}) {
1460                 $str =~ s/ /&nbsp;/g;
1461         }
1462         $str =~ s|([[:cntrl:]])|quot_cec($1)|eg;
1463         return $str;
1464 }
1465
1466 # Make control characters "printable", using character escape codes (CEC)
1467 sub quot_cec {
1468         my $cntrl = shift;
1469         my %opts = @_;
1470         my %es = ( # character escape codes, aka escape sequences
1471                 "\t" => '\t',   # tab            (HT)
1472                 "\n" => '\n',   # line feed      (LF)
1473                 "\r" => '\r',   # carrige return (CR)
1474                 "\f" => '\f',   # form feed      (FF)
1475                 "\b" => '\b',   # backspace      (BS)
1476                 "\a" => '\a',   # alarm (bell)   (BEL)
1477                 "\e" => '\e',   # escape         (ESC)
1478                 "\013" => '\v', # vertical tab   (VT)
1479                 "\000" => '\0', # nul character  (NUL)
1480         );
1481         my $chr = ( (exists $es{$cntrl})
1482                     ? $es{$cntrl}
1483                     : sprintf('\%2x', ord($cntrl)) );
1484         if ($opts{-nohtml}) {
1485                 return $chr;
1486         } else {
1487                 return "<span class=\"cntrl\">$chr</span>";
1488         }
1489 }
1490
1491 # Alternatively use unicode control pictures codepoints,
1492 # Unicode "printable representation" (PR)
1493 sub quot_upr {
1494         my $cntrl = shift;
1495         my %opts = @_;
1496
1497         my $chr = sprintf('&#%04d;', 0x2400+ord($cntrl));
1498         if ($opts{-nohtml}) {
1499                 return $chr;
1500         } else {
1501                 return "<span class=\"cntrl\">$chr</span>";
1502         }
1503 }
1504
1505 # git may return quoted and escaped filenames
1506 sub unquote {
1507         my $str = shift;
1508
1509         sub unq {
1510                 my $seq = shift;
1511                 my %es = ( # character escape codes, aka escape sequences
1512                         't' => "\t",   # tab            (HT, TAB)
1513                         'n' => "\n",   # newline        (NL)
1514                         'r' => "\r",   # return         (CR)
1515                         'f' => "\f",   # form feed      (FF)
1516                         'b' => "\b",   # backspace      (BS)
1517                         'a' => "\a",   # alarm (bell)   (BEL)
1518                         'e' => "\e",   # escape         (ESC)
1519                         'v' => "\013", # vertical tab   (VT)
1520                 );
1521
1522                 if ($seq =~ m/^[0-7]{1,3}$/) {
1523                         # octal char sequence
1524                         return chr(oct($seq));
1525                 } elsif (exists $es{$seq}) {
1526                         # C escape sequence, aka character escape code
1527                         return $es{$seq};
1528                 }
1529                 # quoted ordinary character
1530                 return $seq;
1531         }
1532
1533         if ($str =~ m/^"(.*)"$/) {
1534                 # needs unquoting
1535                 $str = $1;
1536                 $str =~ s/\\([^0-7]|[0-7]{1,3})/unq($1)/eg;
1537         }
1538         return $str;
1539 }
1540
1541 # escape tabs (convert tabs to spaces)
1542 sub untabify {
1543         my $line = shift;
1544
1545         while ((my $pos = index($line, "\t")) != -1) {
1546                 if (my $count = (8 - ($pos % 8))) {
1547                         my $spaces = ' ' x $count;
1548                         $line =~ s/\t/$spaces/;
1549                 }
1550         }
1551
1552         return $line;
1553 }
1554
1555 sub project_in_list {
1556         my $project = shift;
1557         my @list = git_get_projects_list();
1558         return @list && scalar(grep { $_->{'path'} eq $project } @list);
1559 }
1560
1561 ## ----------------------------------------------------------------------
1562 ## HTML aware string manipulation
1563
1564 # Try to chop given string on a word boundary between position
1565 # $len and $len+$add_len. If there is no word boundary there,
1566 # chop at $len+$add_len. Do not chop if chopped part plus ellipsis
1567 # (marking chopped part) would be longer than given string.
1568 sub chop_str {
1569         my $str = shift;
1570         my $len = shift;
1571         my $add_len = shift || 10;
1572         my $where = shift || 'right'; # 'left' | 'center' | 'right'
1573
1574         # Make sure perl knows it is utf8 encoded so we don't
1575         # cut in the middle of a utf8 multibyte char.
1576         $str = to_utf8($str);
1577
1578         # allow only $len chars, but don't cut a word if it would fit in $add_len
1579         # if it doesn't fit, cut it if it's still longer than the dots we would add
1580         # remove chopped character entities entirely
1581
1582         # when chopping in the middle, distribute $len into left and right part
1583         # return early if chopping wouldn't make string shorter
1584         if ($where eq 'center') {
1585                 return $str if ($len + 5 >= length($str)); # filler is length 5
1586                 $len = int($len/2);
1587         } else {
1588                 return $str if ($len + 4 >= length($str)); # filler is length 4
1589         }
1590
1591         # regexps: ending and beginning with word part up to $add_len
1592         my $endre = qr/.{$len}\w{0,$add_len}/;
1593         my $begre = qr/\w{0,$add_len}.{$len}/;
1594
1595         if ($where eq 'left') {
1596                 $str =~ m/^(.*?)($begre)$/;
1597                 my ($lead, $body) = ($1, $2);
1598                 if (length($lead) > 4) {
1599                         $lead = " ...";
1600                 }
1601                 return "$lead$body";
1602
1603         } elsif ($where eq 'center') {
1604                 $str =~ m/^($endre)(.*)$/;
1605                 my ($left, $str)  = ($1, $2);
1606                 $str =~ m/^(.*?)($begre)$/;
1607                 my ($mid, $right) = ($1, $2);
1608                 if (length($mid) > 5) {
1609                         $mid = " ... ";
1610                 }
1611                 return "$left$mid$right";
1612
1613         } else {
1614                 $str =~ m/^($endre)(.*)$/;
1615                 my $body = $1;
1616                 my $tail = $2;
1617                 if (length($tail) > 4) {
1618                         $tail = "... ";
1619                 }
1620                 return "$body$tail";
1621         }
1622 }
1623
1624 # takes the same arguments as chop_str, but also wraps a <span> around the
1625 # result with a title attribute if it does get chopped. Additionally, the
1626 # string is HTML-escaped.
1627 sub chop_and_escape_str {
1628         my ($str) = @_;
1629
1630         my $chopped = chop_str(@_);
1631         if ($chopped eq $str) {
1632                 return esc_html($chopped);
1633         } else {
1634                 $str =~ s/[[:cntrl:]]/?/g;
1635                 return $cgi->span({-title=>$str}, esc_html($chopped));
1636         }
1637 }
1638
1639 ## ----------------------------------------------------------------------
1640 ## functions returning short strings
1641
1642 # CSS class for given age value (in seconds)
1643 sub age_class {
1644         my $age = shift;
1645
1646         if (!defined $age) {
1647                 return "noage";
1648         } elsif ($age < 60*60*2) {
1649                 return "age0";
1650         } elsif ($age < 60*60*24*2) {
1651                 return "age1";
1652         } else {
1653                 return "age2";
1654         }
1655 }
1656
1657 # convert age in seconds to "nn units ago" string
1658 sub age_string {
1659         my $age = shift;
1660         my $age_str;
1661
1662         if ($age > 60*60*24*365*2) {
1663                 $age_str = (int $age/60/60/24/365);
1664                 $age_str .= " years ago";
1665         } elsif ($age > 60*60*24*(365/12)*2) {
1666                 $age_str = int $age/60/60/24/(365/12);
1667                 $age_str .= " months ago";
1668         } elsif ($age > 60*60*24*7*2) {
1669                 $age_str = int $age/60/60/24/7;
1670                 $age_str .= " weeks ago";
1671         } elsif ($age > 60*60*24*2) {
1672                 $age_str = int $age/60/60/24;
1673                 $age_str .= " days ago";
1674         } elsif ($age > 60*60*2) {
1675                 $age_str = int $age/60/60;
1676                 $age_str .= " hours ago";
1677         } elsif ($age > 60*2) {
1678                 $age_str = int $age/60;
1679                 $age_str .= " min ago";
1680         } elsif ($age > 2) {
1681                 $age_str = int $age;
1682                 $age_str .= " sec ago";
1683         } else {
1684                 $age_str .= " right now";
1685         }
1686         return $age_str;
1687 }
1688
1689 use constant {
1690         S_IFINVALID => 0030000,
1691         S_IFGITLINK => 0160000,
1692 };
1693
1694 # submodule/subproject, a commit object reference
1695 sub S_ISGITLINK {
1696         my $mode = shift;
1697
1698         return (($mode & S_IFMT) == S_IFGITLINK)
1699 }
1700
1701 # convert file mode in octal to symbolic file mode string
1702 sub mode_str {
1703         my $mode = oct shift;
1704
1705         if (S_ISGITLINK($mode)) {
1706                 return 'm---------';
1707         } elsif (S_ISDIR($mode & S_IFMT)) {
1708                 return 'drwxr-xr-x';
1709         } elsif (S_ISLNK($mode)) {
1710                 return 'lrwxrwxrwx';
1711         } elsif (S_ISREG($mode)) {
1712                 # git cares only about the executable bit
1713                 if ($mode & S_IXUSR) {
1714                         return '-rwxr-xr-x';
1715                 } else {
1716                         return '-rw-r--r--';
1717                 };
1718         } else {
1719                 return '----------';
1720         }
1721 }
1722
1723 # convert file mode in octal to file type string
1724 sub file_type {
1725         my $mode = shift;
1726
1727         if ($mode !~ m/^[0-7]+$/) {
1728                 return $mode;
1729         } else {
1730                 $mode = oct $mode;
1731         }
1732
1733         if (S_ISGITLINK($mode)) {
1734                 return "submodule";
1735         } elsif (S_ISDIR($mode & S_IFMT)) {
1736                 return "directory";
1737         } elsif (S_ISLNK($mode)) {
1738                 return "symlink";
1739         } elsif (S_ISREG($mode)) {
1740                 return "file";
1741         } else {
1742                 return "unknown";
1743         }
1744 }
1745
1746 # convert file mode in octal to file type description string
1747 sub file_type_long {
1748         my $mode = shift;
1749
1750         if ($mode !~ m/^[0-7]+$/) {
1751                 return $mode;
1752         } else {
1753                 $mode = oct $mode;
1754         }
1755
1756         if (S_ISGITLINK($mode)) {
1757                 return "submodule";
1758         } elsif (S_ISDIR($mode & S_IFMT)) {
1759                 return "directory";
1760         } elsif (S_ISLNK($mode)) {
1761                 return "symlink";
1762         } elsif (S_ISREG($mode)) {
1763                 if ($mode & S_IXUSR) {
1764                         return "executable";
1765                 } else {
1766                         return "file";
1767                 };
1768         } else {
1769                 return "unknown";
1770         }
1771 }
1772
1773
1774 ## ----------------------------------------------------------------------
1775 ## functions returning short HTML fragments, or transforming HTML fragments
1776 ## which don't belong to other sections
1777
1778 # format line of commit message.
1779 sub format_log_line_html {
1780         my $line = shift;
1781
1782         $line = esc_html($line, -nbsp=>1);
1783         $line =~ s{\b([0-9a-fA-F]{8,40})\b}{
1784                 $cgi->a({-href => href(action=>"object", hash=>$1),
1785                                         -class => "text"}, $1);
1786         }eg;
1787
1788         return $line;
1789 }
1790
1791 # format marker of refs pointing to given object
1792
1793 # the destination action is chosen based on object type and current context:
1794 # - for annotated tags, we choose the tag view unless it's the current view
1795 #   already, in which case we go to shortlog view
1796 # - for other refs, we keep the current view if we're in history, shortlog or
1797 #   log view, and select shortlog otherwise
1798 sub format_ref_marker {
1799         my ($refs, $id) = @_;
1800         my $markers = '';
1801
1802         if (defined $refs->{$id}) {
1803                 foreach my $ref (@{$refs->{$id}}) {
1804                         # this code exploits the fact that non-lightweight tags are the
1805                         # only indirect objects, and that they are the only objects for which
1806                         # we want to use tag instead of shortlog as action
1807                         my ($type, $name) = qw();
1808                         my $indirect = ($ref =~ s/\^\{\}$//);
1809                         # e.g. tags/v2.6.11 or heads/next
1810                         if ($ref =~ m!^(.*?)s?/(.*)$!) {
1811                                 $type = $1;
1812                                 $name = $2;
1813                         } else {
1814                                 $type = "ref";
1815                                 $name = $ref;
1816                         }
1817
1818                         my $class = $type;
1819                         $class .= " indirect" if $indirect;
1820
1821                         my $dest_action = "shortlog";
1822
1823                         if ($indirect) {
1824                                 $dest_action = "tag" unless $action eq "tag";
1825                         } elsif ($action =~ /^(history|(short)?log)$/) {
1826                                 $dest_action = $action;
1827                         }
1828
1829                         my $dest = "";
1830                         $dest .= "refs/" unless $ref =~ m!^refs/!;
1831                         $dest .= $ref;
1832
1833                         my $link = $cgi->a({
1834                                 -href => href(
1835                                         action=>$dest_action,
1836                                         hash=>$dest
1837                                 )}, $name);
1838
1839                         $markers .= " <span class=\"".esc_attr($class)."\" title=\"".esc_attr($ref)."\">" .
1840                                 $link . "</span>";
1841                 }
1842         }
1843
1844         if ($markers) {
1845                 return ' <span class="refs">'. $markers . '</span>';
1846         } else {
1847                 return "";
1848         }
1849 }
1850
1851 # format, perhaps shortened and with markers, title line
1852 sub format_subject_html {
1853         my ($long, $short, $href, $extra) = @_;
1854         $extra = '' unless defined($extra);
1855
1856         if (length($short) < length($long)) {
1857                 $long =~ s/[[:cntrl:]]/?/g;
1858                 return $cgi->a({-href => $href, -class => "list subject",
1859                                 -title => to_utf8($long)},
1860                        esc_html($short)) . $extra;
1861         } else {
1862                 return $cgi->a({-href => $href, -class => "list subject"},
1863                        esc_html($long)) . $extra;
1864         }
1865 }
1866
1867 # Rather than recomputing the url for an email multiple times, we cache it
1868 # after the first hit. This gives a visible benefit in views where the avatar
1869 # for the same email is used repeatedly (e.g. shortlog).
1870 # The cache is shared by all avatar engines (currently gravatar only), which
1871 # are free to use it as preferred. Since only one avatar engine is used for any
1872 # given page, there's no risk for cache conflicts.
1873 our %avatar_cache = ();
1874
1875 # Compute the picon url for a given email, by using the picon search service over at
1876 # http://www.cs.indiana.edu/picons/search.html
1877 sub picon_url {
1878         my $email = lc shift;
1879         if (!$avatar_cache{$email}) {
1880                 my ($user, $domain) = split('@', $email);
1881                 $avatar_cache{$email} =
1882                         "http://www.cs.indiana.edu/cgi-pub/kinzler/piconsearch.cgi/" .
1883                         "$domain/$user/" .
1884                         "users+domains+unknown/up/single";
1885         }
1886         return $avatar_cache{$email};
1887 }
1888
1889 # Compute the gravatar url for a given email, if it's not in the cache already.
1890 # Gravatar stores only the part of the URL before the size, since that's the
1891 # one computationally more expensive. This also allows reuse of the cache for
1892 # different sizes (for this particular engine).
1893 sub gravatar_url {
1894         my $email = lc shift;
1895         my $size = shift;
1896         $avatar_cache{$email} ||=
1897                 "http://www.gravatar.com/avatar/" .
1898                         Digest::MD5::md5_hex($email) . "?s=";
1899         return $avatar_cache{$email} . $size;
1900 }
1901
1902 # Insert an avatar for the given $email at the given $size if the feature
1903 # is enabled.
1904 sub git_get_avatar {
1905         my ($email, %opts) = @_;
1906         my $pre_white  = ($opts{-pad_before} ? "&nbsp;" : "");
1907         my $post_white = ($opts{-pad_after}  ? "&nbsp;" : "");
1908         $opts{-size} ||= 'default';
1909         my $size = $avatar_size{$opts{-size}} || $avatar_size{'default'};
1910         my $url = "";
1911         if ($git_avatar eq 'gravatar') {
1912                 $url = gravatar_url($email, $size);
1913         } elsif ($git_avatar eq 'picon') {
1914                 $url = picon_url($email);
1915         }
1916         # Other providers can be added by extending the if chain, defining $url
1917         # as needed. If no variant puts something in $url, we assume avatars
1918         # are completely disabled/unavailable.
1919         if ($url) {
1920                 return $pre_white .
1921                        "<img width=\"$size\" " .
1922                             "class=\"avatar\" " .
1923                             "src=\"".esc_url($url)."\" " .
1924                             "alt=\"\" " .
1925                        "/>" . $post_white;
1926         } else {
1927                 return "";
1928         }
1929 }
1930
1931 sub format_search_author {
1932         my ($author, $searchtype, $displaytext) = @_;
1933         my $have_search = gitweb_check_feature('search');
1934
1935         if ($have_search) {
1936                 my $performed = "";
1937                 if ($searchtype eq 'author') {
1938                         $performed = "authored";
1939                 } elsif ($searchtype eq 'committer') {
1940                         $performed = "committed";
1941                 }
1942
1943                 return $cgi->a({-href => href(action=>"search", hash=>$hash,
1944                                 searchtext=>$author,
1945                                 searchtype=>$searchtype), class=>"list",
1946                                 title=>"Search for commits $performed by $author"},
1947                                 $displaytext);
1948
1949         } else {
1950                 return $displaytext;
1951         }
1952 }
1953
1954 # format the author name of the given commit with the given tag
1955 # the author name is chopped and escaped according to the other
1956 # optional parameters (see chop_str).
1957 sub format_author_html {
1958         my $tag = shift;
1959         my $co = shift;
1960         my $author = chop_and_escape_str($co->{'author_name'}, @_);
1961         return "<$tag class=\"author\">" .
1962                format_search_author($co->{'author_name'}, "author",
1963                        git_get_avatar($co->{'author_email'}, -pad_after => 1) .
1964                        $author) .
1965                "</$tag>";
1966 }
1967
1968 # format git diff header line, i.e. "diff --(git|combined|cc) ..."
1969 sub format_git_diff_header_line {
1970         my $line = shift;
1971         my $diffinfo = shift;
1972         my ($from, $to) = @_;
1973
1974         if ($diffinfo->{'nparents'}) {
1975                 # combined diff
1976                 $line =~ s!^(diff (.*?) )"?.*$!$1!;
1977                 if ($to->{'href'}) {
1978                         $line .= $cgi->a({-href => $to->{'href'}, -class => "path"},
1979                                          esc_path($to->{'file'}));
1980                 } else { # file was deleted (no href)
1981                         $line .= esc_path($to->{'file'});
1982                 }
1983         } else {
1984                 # "ordinary" diff
1985                 $line =~ s!^(diff (.*?) )"?a/.*$!$1!;
1986                 if ($from->{'href'}) {
1987                         $line .= $cgi->a({-href => $from->{'href'}, -class => "path"},
1988                                          'a/' . esc_path($from->{'file'}));
1989                 } else { # file was added (no href)
1990                         $line .= 'a/' . esc_path($from->{'file'});
1991                 }
1992                 $line .= ' ';
1993                 if ($to->{'href'}) {
1994                         $line .= $cgi->a({-href => $to->{'href'}, -class => "path"},
1995                                          'b/' . esc_path($to->{'file'}));
1996                 } else { # file was deleted
1997                         $line .= 'b/' . esc_path($to->{'file'});
1998                 }
1999         }
2000
2001         return "<div class=\"diff header\">$line</div>\n";
2002 }
2003
2004 # format extended diff header line, before patch itself
2005 sub format_extended_diff_header_line {
2006         my $line = shift;
2007         my $diffinfo = shift;
2008         my ($from, $to) = @_;
2009
2010         # match <path>
2011         if ($line =~ s!^((copy|rename) from ).*$!$1! && $from->{'href'}) {
2012                 $line .= $cgi->a({-href=>$from->{'href'}, -class=>"path"},
2013                                        esc_path($from->{'file'}));
2014         }
2015         if ($line =~ s!^((copy|rename) to ).*$!$1! && $to->{'href'}) {
2016                 $line .= $cgi->a({-href=>$to->{'href'}, -class=>"path"},
2017                                  esc_path($to->{'file'}));
2018         }
2019         # match single <mode>
2020         if ($line =~ m/\s(\d{6})$/) {
2021                 $line .= '<span class="info"> (' .
2022                          file_type_long($1) .
2023                          ')</span>';
2024         }
2025         # match <hash>
2026         if ($line =~ m/^index [0-9a-fA-F]{40},[0-9a-fA-F]{40}/) {
2027                 # can match only for combined diff
2028                 $line = 'index ';
2029                 for (my $i = 0; $i < $diffinfo->{'nparents'}; $i++) {
2030                         if ($from->{'href'}[$i]) {
2031                                 $line .= $cgi->a({-href=>$from->{'href'}[$i],
2032                                                   -class=>"hash"},
2033                                                  substr($diffinfo->{'from_id'}[$i],0,7));
2034                         } else {
2035                                 $line .= '0' x 7;
2036                         }
2037                         # separator
2038                         $line .= ',' if ($i < $diffinfo->{'nparents'} - 1);
2039                 }
2040                 $line .= '..';
2041                 if ($to->{'href'}) {
2042                         $line .= $cgi->a({-href=>$to->{'href'}, -class=>"hash"},
2043                                          substr($diffinfo->{'to_id'},0,7));
2044                 } else {
2045                         $line .= '0' x 7;
2046                 }
2047
2048         } elsif ($line =~ m/^index [0-9a-fA-F]{40}..[0-9a-fA-F]{40}/) {
2049                 # can match only for ordinary diff
2050                 my ($from_link, $to_link);
2051                 if ($from->{'href'}) {
2052                         $from_link = $cgi->a({-href=>$from->{'href'}, -class=>"hash"},
2053                                              substr($diffinfo->{'from_id'},0,7));
2054                 } else {
2055                         $from_link = '0' x 7;
2056                 }
2057                 if ($to->{'href'}) {
2058                         $to_link = $cgi->a({-href=>$to->{'href'}, -class=>"hash"},
2059                                            substr($diffinfo->{'to_id'},0,7));
2060                 } else {
2061                         $to_link = '0' x 7;
2062                 }
2063                 my ($from_id, $to_id) = ($diffinfo->{'from_id'}, $diffinfo->{'to_id'});
2064                 $line =~ s!$from_id\.\.$to_id!$from_link..$to_link!;
2065         }
2066
2067         return $line . "<br/>\n";
2068 }
2069
2070 # format from-file/to-file diff header
2071 sub format_diff_from_to_header {
2072         my ($from_line, $to_line, $diffinfo, $from, $to, @parents) = @_;
2073         my $line;
2074         my $result = '';
2075
2076         $line = $from_line;
2077         #assert($line =~ m/^---/) if DEBUG;
2078         # no extra formatting for "^--- /dev/null"
2079         if (! $diffinfo->{'nparents'}) {
2080                 # ordinary (single parent) diff
2081                 if ($line =~ m!^--- "?a/!) {
2082                         if ($from->{'href'}) {
2083                                 $line = '--- a/' .
2084                                         $cgi->a({-href=>$from->{'href'}, -class=>"path"},
2085                                                 esc_path($from->{'file'}));
2086                         } else {
2087                                 $line = '--- a/' .
2088                                         esc_path($from->{'file'});
2089                         }
2090                 }
2091                 $result .= qq!<div class="diff from_file">$line</div>\n!;
2092
2093         } else {
2094                 # combined diff (merge commit)
2095                 for (my $i = 0; $i < $diffinfo->{'nparents'}; $i++) {
2096                         if ($from->{'href'}[$i]) {
2097                                 $line = '--- ' .
2098                                         $cgi->a({-href=>href(action=>"blobdiff",
2099                                                              hash_parent=>$diffinfo->{'from_id'}[$i],
2100                                                              hash_parent_base=>$parents[$i],
2101                                                              file_parent=>$from->{'file'}[$i],
2102                                                              hash=>$diffinfo->{'to_id'},
2103                                                              hash_base=>$hash,
2104                                                              file_name=>$to->{'file'}),
2105                                                  -class=>"path",
2106                                                  -title=>"diff" . ($i+1)},
2107                                                 $i+1) .
2108                                         '/' .
2109                                         $cgi->a({-href=>$from->{'href'}[$i], -class=>"path"},
2110                                                 esc_path($from->{'file'}[$i]));
2111                         } else {
2112                                 $line = '--- /dev/null';
2113                         }
2114                         $result .= qq!<div class="diff from_file">$line</div>\n!;
2115                 }
2116         }
2117
2118         $line = $to_line;
2119         #assert($line =~ m/^\+\+\+/) if DEBUG;
2120         # no extra formatting for "^+++ /dev/null"
2121         if ($line =~ m!^\+\+\+ "?b/!) {
2122                 if ($to->{'href'}) {
2123                         $line = '+++ b/' .
2124                                 $cgi->a({-href=>$to->{'href'}, -class=>"path"},
2125                                         esc_path($to->{'file'}));
2126                 } else {
2127                         $line = '+++ b/' .
2128                                 esc_path($to->{'file'});
2129                 }
2130         }
2131         $result .= qq!<div class="diff to_file">$line</div>\n!;
2132
2133         return $result;
2134 }
2135
2136 # create note for patch simplified by combined diff
2137 sub format_diff_cc_simplified {
2138         my ($diffinfo, @parents) = @_;
2139         my $result = '';
2140
2141         $result .= "<div class=\"diff header\">" .
2142                    "diff --cc ";
2143         if (!is_deleted($diffinfo)) {
2144                 $result .= $cgi->a({-href => href(action=>"blob",
2145                                                   hash_base=>$hash,
2146                                                   hash=>$diffinfo->{'to_id'},
2147                                                   file_name=>$diffinfo->{'to_file'}),
2148                                     -class => "path"},
2149                                    esc_path($diffinfo->{'to_file'}));
2150         } else {
2151                 $result .= esc_path($diffinfo->{'to_file'});
2152         }
2153         $result .= "</div>\n" . # class="diff header"
2154                    "<div class=\"diff nodifferences\">" .
2155                    "Simple merge" .
2156                    "</div>\n"; # class="diff nodifferences"
2157
2158         return $result;
2159 }
2160
2161 # format patch (diff) line (not to be used for diff headers)
2162 sub format_diff_line {
2163         my $line = shift;
2164         my ($from, $to) = @_;
2165         my $diff_class = "";
2166
2167         chomp $line;
2168
2169         if ($from && $to && ref($from->{'href'}) eq "ARRAY") {
2170                 # combined diff
2171                 my $prefix = substr($line, 0, scalar @{$from->{'href'}});
2172                 if ($line =~ m/^\@{3}/) {
2173                         $diff_class = " chunk_header";
2174                 } elsif ($line =~ m/^\\/) {
2175                         $diff_class = " incomplete";
2176                 } elsif ($prefix =~ tr/+/+/) {
2177                         $diff_class = " add";
2178                 } elsif ($prefix =~ tr/-/-/) {
2179                         $diff_class = " rem";
2180                 }
2181         } else {
2182                 # assume ordinary diff
2183                 my $char = substr($line, 0, 1);
2184                 if ($char eq '+') {
2185                         $diff_class = " add";
2186                 } elsif ($char eq '-') {
2187                         $diff_class = " rem";
2188                 } elsif ($char eq '@') {
2189                         $diff_class = " chunk_header";
2190                 } elsif ($char eq "\\") {
2191                         $diff_class = " incomplete";
2192                 }
2193         }
2194         $line = untabify($line);
2195         if ($from && $to && $line =~ m/^\@{2} /) {
2196                 my ($from_text, $from_start, $from_lines, $to_text, $to_start, $to_lines, $section) =
2197                         $line =~ m/^\@{2} (-(\d+)(?:,(\d+))?) (\+(\d+)(?:,(\d+))?) \@{2}(.*)$/;
2198
2199                 $from_lines = 0 unless defined $from_lines;
2200                 $to_lines   = 0 unless defined $to_lines;
2201
2202                 if ($from->{'href'}) {
2203                         $from_text = $cgi->a({-href=>"$from->{'href'}#l$from_start",
2204                                              -class=>"list"}, $from_text);
2205                 }
2206                 if ($to->{'href'}) {
2207                         $to_text   = $cgi->a({-href=>"$to->{'href'}#l$to_start",
2208                                              -class=>"list"}, $to_text);
2209                 }
2210                 $line = "<span class=\"chunk_info\">@@ $from_text $to_text @@</span>" .
2211                         "<span class=\"section\">" . esc_html($section, -nbsp=>1) . "</span>";
2212                 return "<div class=\"diff$diff_class\">$line</div>\n";
2213         } elsif ($from && $to && $line =~ m/^\@{3}/) {
2214                 my ($prefix, $ranges, $section) = $line =~ m/^(\@+) (.*?) \@+(.*)$/;
2215                 my (@from_text, @from_start, @from_nlines, $to_text, $to_start, $to_nlines);
2216
2217                 @from_text = split(' ', $ranges);
2218                 for (my $i = 0; $i < @from_text; ++$i) {
2219                         ($from_start[$i], $from_nlines[$i]) =
2220                                 (split(',', substr($from_text[$i], 1)), 0);
2221                 }
2222
2223                 $to_text   = pop @from_text;
2224                 $to_start  = pop @from_start;
2225                 $to_nlines = pop @from_nlines;
2226
2227                 $line = "<span class=\"chunk_info\">$prefix ";
2228                 for (my $i = 0; $i < @from_text; ++$i) {
2229                         if ($from->{'href'}[$i]) {
2230                                 $line .= $cgi->a({-href=>"$from->{'href'}[$i]#l$from_start[$i]",
2231                                                   -class=>"list"}, $from_text[$i]);
2232                         } else {
2233                                 $line .= $from_text[$i];
2234                         }
2235                         $line .= " ";
2236                 }
2237                 if ($to->{'href'}) {
2238                         $line .= $cgi->a({-href=>"$to->{'href'}#l$to_start",
2239                                           -class=>"list"}, $to_text);
2240                 } else {
2241                         $line .= $to_text;
2242                 }
2243                 $line .= " $prefix</span>" .
2244                          "<span class=\"section\">" . esc_html($section, -nbsp=>1) . "</span>";
2245                 return "<div class=\"diff$diff_class\">$line</div>\n";
2246         }
2247         return "<div class=\"diff$diff_class\">" . esc_html($line, -nbsp=>1) . "</div>\n";
2248 }
2249
2250 # Generates undef or something like "_snapshot_" or "snapshot (_tbz2_ _zip_)",
2251 # linked.  Pass the hash of the tree/commit to snapshot.
2252 sub format_snapshot_links {
2253         my ($hash) = @_;
2254         my $num_fmts = @snapshot_fmts;
2255         if ($num_fmts > 1) {
2256                 # A parenthesized list of links bearing format names.
2257                 # e.g. "snapshot (_tar.gz_ _zip_)"
2258                 return "snapshot (" . join(' ', map
2259                         $cgi->a({
2260                                 -href => href(
2261                                         action=>"snapshot",
2262                                         hash=>$hash,
2263                                         snapshot_format=>$_
2264                                 )
2265                         }, $known_snapshot_formats{$_}{'display'})
2266                 , @snapshot_fmts) . ")";
2267         } elsif ($num_fmts == 1) {
2268                 # A single "snapshot" link whose tooltip bears the format name.
2269                 # i.e. "_snapshot_"
2270                 my ($fmt) = @snapshot_fmts;
2271                 return
2272                         $cgi->a({
2273                                 -href => href(
2274                                         action=>"snapshot",
2275                                         hash=>$hash,
2276                                         snapshot_format=>$fmt
2277                                 ),
2278                                 -title => "in format: $known_snapshot_formats{$fmt}{'display'}"
2279                         }, "snapshot");
2280         } else { # $num_fmts == 0
2281                 return undef;
2282         }
2283 }
2284
2285 ## ......................................................................
2286 ## functions returning values to be passed, perhaps after some
2287 ## transformation, to other functions; e.g. returning arguments to href()
2288
2289 # returns hash to be passed to href to generate gitweb URL
2290 # in -title key it returns description of link
2291 sub get_feed_info {
2292         my $format = shift || 'Atom';
2293         my %res = (action => lc($format));
2294
2295         # feed links are possible only for project views
2296         return unless (defined $project);
2297         # some views should link to OPML, or to generic project feed,
2298         # or don't have specific feed yet (so they should use generic)
2299         return if ($action =~ /^(?:tags|heads|forks|tag|search)$/x);
2300
2301         my $branch;
2302         # branches refs uses 'refs/heads/' prefix (fullname) to differentiate
2303         # from tag links; this also makes possible to detect branch links
2304         if ((defined $hash_base && $hash_base =~ m!^refs/heads/(.*)$!) ||
2305             (defined $hash      && $hash      =~ m!^refs/heads/(.*)$!)) {
2306                 $branch = $1;
2307         }
2308         # find log type for feed description (title)
2309         my $type = 'log';
2310         if (defined $file_name) {
2311                 $type  = "history of $file_name";
2312                 $type .= "/" if ($action eq 'tree');
2313                 $type .= " on '$branch'" if (defined $branch);
2314         } else {
2315                 $type = "log of $branch" if (defined $branch);
2316         }
2317
2318         $res{-title} = $type;
2319         $res{'hash'} = (defined $branch ? "refs/heads/$branch" : undef);
2320         $res{'file_name'} = $file_name;
2321
2322         return %res;
2323 }
2324
2325 ## ----------------------------------------------------------------------
2326 ## git utility subroutines, invoking git commands
2327
2328 # returns path to the core git executable and the --git-dir parameter as list
2329 sub git_cmd {
2330         $number_of_git_cmds++;
2331         return $GIT, '--git-dir='.$git_dir;
2332 }
2333
2334 # quote the given arguments for passing them to the shell
2335 # quote_command("command", "arg 1", "arg with ' and ! characters")
2336 # => "'command' 'arg 1' 'arg with '\'' and '\!' characters'"
2337 # Try to avoid using this function wherever possible.
2338 sub quote_command {
2339         return join(' ',
2340                 map { my $a = $_; $a =~ s/(['!])/'\\$1'/g; "'$a'" } @_ );
2341 }
2342
2343 # get HEAD ref of given project as hash
2344 sub git_get_head_hash {
2345         return git_get_full_hash(shift, 'HEAD');
2346 }
2347
2348 sub git_get_full_hash {
2349         return git_get_hash(@_);
2350 }
2351
2352 sub git_get_short_hash {
2353         return git_get_hash(@_, '--short=7');
2354 }
2355
2356 sub git_get_hash {
2357         my ($project, $hash, @options) = @_;
2358         my $o_git_dir = $git_dir;
2359         my $retval = undef;
2360         $git_dir = "$projectroot/$project";
2361         if (open my $fd, '-|', git_cmd(), 'rev-parse',
2362             '--verify', '-q', @options, $hash) {
2363                 $retval = <$fd>;
2364                 chomp $retval if defined $retval;
2365                 close $fd;
2366         }
2367         if (defined $o_git_dir) {
2368                 $git_dir = $o_git_dir;
2369         }
2370         return $retval;
2371 }
2372
2373 # get type of given object
2374 sub git_get_type {
2375         my $hash = shift;
2376
2377         open my $fd, "-|", git_cmd(), "cat-file", '-t', $hash or return;
2378         my $type = <$fd>;
2379         close $fd or return;
2380         chomp $type;
2381         return $type;
2382 }
2383
2384 # repository configuration
2385 our $config_file = '';
2386 our %config;
2387
2388 # store multiple values for single key as anonymous array reference
2389 # single values stored directly in the hash, not as [ <value> ]
2390 sub hash_set_multi {
2391         my ($hash, $key, $value) = @_;
2392
2393         if (!exists $hash->{$key}) {
2394                 $hash->{$key} = $value;
2395         } elsif (!ref $hash->{$key}) {
2396                 $hash->{$key} = [ $hash->{$key}, $value ];
2397         } else {
2398                 push @{$hash->{$key}}, $value;
2399         }
2400 }
2401
2402 # return hash of git project configuration
2403 # optionally limited to some section, e.g. 'gitweb'
2404 sub git_parse_project_config {
2405         my $section_regexp = shift;
2406         my %config;
2407
2408         local $/ = "\0";
2409
2410         open my $fh, "-|", git_cmd(), "config", '-z', '-l',
2411                 or return;
2412
2413         while (my $keyval = <$fh>) {
2414                 chomp $keyval;
2415                 my ($key, $value) = split(/\n/, $keyval, 2);
2416
2417                 hash_set_multi(\%config, $key, $value)
2418                         if (!defined $section_regexp || $key =~ /^(?:$section_regexp)\./o);
2419         }
2420         close $fh;
2421
2422         return %config;
2423 }
2424
2425 # convert config value to boolean: 'true' or 'false'
2426 # no value, number > 0, 'true' and 'yes' values are true
2427 # rest of values are treated as false (never as error)
2428 sub config_to_bool {
2429         my $val = shift;
2430
2431         return 1 if !defined $val;             # section.key
2432
2433         # strip leading and trailing whitespace
2434         $val =~ s/^\s+//;
2435         $val =~ s/\s+$//;
2436
2437         return (($val =~ /^\d+$/ && $val) ||   # section.key = 1
2438                 ($val =~ /^(?:true|yes)$/i));  # section.key = true
2439 }
2440
2441 # convert config value to simple decimal number
2442 # an optional value suffix of 'k', 'm', or 'g' will cause the value
2443 # to be multiplied by 1024, 1048576, or 1073741824
2444 sub config_to_int {
2445         my $val = shift;
2446
2447         # strip leading and trailing whitespace
2448         $val =~ s/^\s+//;
2449         $val =~ s/\s+$//;
2450
2451         if (my ($num, $unit) = ($val =~ /^([0-9]*)([kmg])$/i)) {
2452                 $unit = lc($unit);
2453                 # unknown unit is treated as 1
2454                 return $num * ($unit eq 'g' ? 1073741824 :
2455                                $unit eq 'm' ?    1048576 :
2456                                $unit eq 'k' ?       1024 : 1);
2457         }
2458         return $val;
2459 }
2460
2461 # convert config value to array reference, if needed
2462 sub config_to_multi {
2463         my $val = shift;
2464
2465         return ref($val) ? $val : (defined($val) ? [ $val ] : []);
2466 }
2467
2468 sub git_get_project_config {
2469         my ($key, $type) = @_;
2470
2471         return unless defined $git_dir;
2472
2473         # key sanity check
2474         return unless ($key);
2475         $key =~ s/^gitweb\.//;
2476         return if ($key =~ m/\W/);
2477
2478         # type sanity check
2479         if (defined $type) {
2480                 $type =~ s/^--//;
2481                 $type = undef
2482                         unless ($type eq 'bool' || $type eq 'int');
2483         }
2484
2485         # get config
2486         if (!defined $config_file ||
2487             $config_file ne "$git_dir/config") {
2488                 %config = git_parse_project_config('gitweb');
2489                 $config_file = "$git_dir/config";
2490         }
2491
2492         # check if config variable (key) exists
2493         return unless exists $config{"gitweb.$key"};
2494
2495         # ensure given type
2496         if (!defined $type) {
2497                 return $config{"gitweb.$key"};
2498         } elsif ($type eq 'bool') {
2499                 # backward compatibility: 'git config --bool' returns true/false
2500                 return config_to_bool($config{"gitweb.$key"}) ? 'true' : 'false';
2501         } elsif ($type eq 'int') {
2502                 return config_to_int($config{"gitweb.$key"});
2503         }
2504         return $config{"gitweb.$key"};
2505 }
2506
2507 # get hash of given path at given ref
2508 sub git_get_hash_by_path {
2509         my $base = shift;
2510         my $path = shift || return undef;
2511         my $type = shift;
2512
2513         $path =~ s,/+$,,;
2514
2515         open my $fd, "-|", git_cmd(), "ls-tree", $base, "--", $path
2516                 or die_error(500, "Open git-ls-tree failed");
2517         my $line = <$fd>;
2518         close $fd or return undef;
2519
2520         if (!defined $line) {
2521                 # there is no tree or hash given by $path at $base
2522                 return undef;
2523         }
2524
2525         #'100644 blob 0fa3f3a66fb6a137f6ec2c19351ed4d807070ffa  panic.c'
2526         $line =~ m/^([0-9]+) (.+) ([0-9a-fA-F]{40})\t/;
2527         if (defined $type && $type ne $2) {
2528                 # type doesn't match
2529                 return undef;
2530         }
2531         return $3;
2532 }
2533
2534 # get path of entry with given hash at given tree-ish (ref)
2535 # used to get 'from' filename for combined diff (merge commit) for renames
2536 sub git_get_path_by_hash {
2537         my $base = shift || return;
2538         my $hash = shift || return;
2539
2540         local $/ = "\0";
2541
2542         open my $fd, "-|", git_cmd(), "ls-tree", '-r', '-t', '-z', $base
2543                 or return undef;
2544         while (my $line = <$fd>) {
2545                 chomp $line;
2546
2547                 #'040000 tree 595596a6a9117ddba9fe379b6b012b558bac8423  gitweb'
2548                 #'100644 blob e02e90f0429be0d2a69b76571101f20b8f75530f  gitweb/README'
2549                 if ($line =~ m/(?:[0-9]+) (?:.+) $hash\t(.+)$/) {
2550                         close $fd;
2551                         return $1;
2552                 }
2553         }
2554         close $fd;
2555         return undef;
2556 }
2557
2558 ## ......................................................................
2559 ## git utility functions, directly accessing git repository
2560
2561 sub git_get_project_description {
2562         my $path = shift;
2563
2564         $git_dir = "$projectroot/$path";
2565         open my $fd, '<', "$git_dir/description"
2566                 or return git_get_project_config('description');
2567         my $descr = <$fd>;
2568         close $fd;
2569         if (defined $descr) {
2570                 chomp $descr;
2571         }
2572         return $descr;
2573 }
2574
2575 sub git_get_project_ctags {
2576         my $path = shift;
2577         my $ctags = {};
2578
2579         $git_dir = "$projectroot/$path";
2580         opendir my $dh, "$git_dir/ctags"
2581                 or return $ctags;
2582         foreach (grep { -f $_ } map { "$git_dir/ctags/$_" } readdir($dh)) {
2583                 open my $ct, '<', $_ or next;
2584                 my $val = <$ct>;
2585                 chomp $val;
2586                 close $ct;
2587                 my $ctag = $_; $ctag =~ s#.*/##;
2588                 $ctags->{$ctag} = $val;
2589         }
2590         closedir $dh;
2591         $ctags;
2592 }
2593
2594 sub git_populate_project_tagcloud {
2595         my $ctags = shift;
2596
2597         # First, merge different-cased tags; tags vote on casing
2598         my %ctags_lc;
2599         foreach (keys %$ctags) {
2600                 $ctags_lc{lc $_}->{count} += $ctags->{$_};
2601                 if (not $ctags_lc{lc $_}->{topcount}
2602                     or $ctags_lc{lc $_}->{topcount} < $ctags->{$_}) {
2603                         $ctags_lc{lc $_}->{topcount} = $ctags->{$_};
2604                         $ctags_lc{lc $_}->{topname} = $_;
2605                 }
2606         }
2607
2608         my $cloud;
2609         if (eval { require HTML::TagCloud; 1; }) {
2610                 $cloud = HTML::TagCloud->new;
2611                 foreach (sort keys %ctags_lc) {
2612                         # Pad the title with spaces so that the cloud looks
2613                         # less crammed.
2614                         my $title = $ctags_lc{$_}->{topname};
2615                         $title =~ s/ /&nbsp;/g;
2616                         $title =~ s/^/&nbsp;/g;
2617                         $title =~ s/$/&nbsp;/g;
2618                         $cloud->add($title, $home_link."?by_tag=".$_, $ctags_lc{$_}->{count});
2619                 }
2620         } else {
2621                 $cloud = \%ctags_lc;
2622         }
2623         $cloud;
2624 }
2625
2626 sub git_show_project_tagcloud {
2627         my ($cloud, $count) = @_;
2628         print STDERR ref($cloud)."..\n";
2629         if (ref $cloud eq 'HTML::TagCloud') {
2630                 return $cloud->html_and_css($count);
2631         } else {
2632                 my @tags = sort { $cloud->{$a}->{count} <=> $cloud->{$b}->{count} } keys %$cloud;
2633                 return '<p align="center">' . join (', ', map {
2634                         $cgi->a({-href=>"$home_link?by_tag=$_"}, $cloud->{$_}->{topname})
2635                 } splice(@tags, 0, $count)) . '</p>';
2636         }
2637 }
2638
2639 sub git_get_project_url_list {
2640         my $path = shift;
2641
2642         $git_dir = "$projectroot/$path";
2643         open my $fd, '<', "$git_dir/cloneurl"
2644                 or return wantarray ?
2645                 @{ config_to_multi(git_get_project_config('url')) } :
2646                    config_to_multi(git_get_project_config('url'));
2647         my @git_project_url_list = map { chomp; $_ } <$fd>;
2648         close $fd;
2649
2650         return wantarray ? @git_project_url_list : \@git_project_url_list;
2651 }
2652
2653 sub git_get_projects_list {
2654         my ($filter) = @_;
2655         my @list;
2656
2657         $filter ||= '';
2658         $filter =~ s/\.git$//;
2659
2660         my $check_forks = gitweb_check_feature('forks');
2661
2662         if (-d $projects_list) {
2663                 # search in directory
2664                 my $dir = $projects_list . ($filter ? "/$filter" : '');
2665                 # remove the trailing "/"
2666                 $dir =~ s!/+$!!;
2667                 my $pfxlen = length("$dir");
2668                 my $pfxdepth = ($dir =~ tr!/!!);
2669
2670                 File::Find::find({
2671                         follow_fast => 1, # follow symbolic links
2672                         follow_skip => 2, # ignore duplicates
2673                         dangling_symlinks => 0, # ignore dangling symlinks, silently
2674                         wanted => sub {
2675                                 # global variables
2676                                 our $project_maxdepth;
2677                                 our $projectroot;
2678                                 # skip project-list toplevel, if we get it.
2679                                 return if (m!^[/.]$!);
2680                                 # only directories can be git repositories
2681                                 return unless (-d $_);
2682                                 # don't traverse too deep (Find is super slow on os x)
2683                                 if (($File::Find::name =~ tr!/!!) - $pfxdepth > $project_maxdepth) {
2684                                         $File::Find::prune = 1;
2685                                         return;
2686                                 }
2687
2688                                 my $subdir = substr($File::Find::name, $pfxlen + 1);
2689                                 # we check related file in $projectroot
2690                                 my $path = ($filter ? "$filter/" : '') . $subdir;
2691                                 if (check_export_ok("$projectroot/$path")) {
2692                                         push @list, { path => $path };
2693                                         $File::Find::prune = 1;
2694                                 }
2695                         },
2696                 }, "$dir");
2697
2698         } elsif (-f $projects_list) {
2699                 # read from file(url-encoded):
2700                 # 'git%2Fgit.git Linus+Torvalds'
2701                 # 'libs%2Fklibc%2Fklibc.git H.+Peter+Anvin'
2702                 # 'linux%2Fhotplug%2Fudev.git Greg+Kroah-Hartman'
2703                 my %paths;
2704                 open my $fd, '<', $projects_list or return;
2705         PROJECT:
2706                 while (my $line = <$fd>) {
2707                         chomp $line;
2708                         my ($path, $owner) = split ' ', $line;
2709                         $path = unescape($path);
2710                         $owner = unescape($owner);
2711                         if (!defined $path) {
2712                                 next;
2713                         }
2714                         if ($filter ne '') {
2715                                 # looking for forks;
2716                                 my $pfx = substr($path, 0, length($filter));
2717                                 if ($pfx ne $filter) {
2718                                         next PROJECT;
2719                                 }
2720                                 my $sfx = substr($path, length($filter));
2721                                 if ($sfx !~ /^\/.*\.git$/) {
2722                                         next PROJECT;
2723                                 }
2724                         } elsif ($check_forks) {
2725                         PATH:
2726                                 foreach my $filter (keys %paths) {
2727                                         # looking for forks;
2728                                         my $pfx = substr($path, 0, length($filter));
2729                                         if ($pfx ne $filter) {
2730                                                 next PATH;
2731                                         }
2732                                         my $sfx = substr($path, length($filter));
2733                                         if ($sfx !~ /^\/.*\.git$/) {
2734                                                 next PATH;
2735                                         }
2736                                         # is a fork, don't include it in
2737                                         # the list
2738                                         next PROJECT;
2739                                 }
2740                         }
2741                         if (check_export_ok("$projectroot/$path")) {
2742                                 my $pr = {
2743                                         path => $path,
2744                                         owner => to_utf8($owner),
2745                                 };
2746                                 push @list, $pr;
2747                                 (my $forks_path = $path) =~ s/\.git$//;
2748                                 $paths{$forks_path}++;
2749                         }
2750                 }
2751                 close $fd;
2752         }
2753         return @list;
2754 }
2755
2756 our $gitweb_project_owner = undef;
2757 sub git_get_project_list_from_file {
2758
2759         return if (defined $gitweb_project_owner);
2760
2761         $gitweb_project_owner = {};
2762         # read from file (url-encoded):
2763         # 'git%2Fgit.git Linus+Torvalds'
2764         # 'libs%2Fklibc%2Fklibc.git H.+Peter+Anvin'
2765         # 'linux%2Fhotplug%2Fudev.git Greg+Kroah-Hartman'
2766         if (-f $projects_list) {
2767                 open(my $fd, '<', $projects_list);
2768                 while (my $line = <$fd>) {
2769                         chomp $line;
2770                         my ($pr, $ow) = split ' ', $line;
2771                         $pr = unescape($pr);
2772                         $ow = unescape($ow);
2773                         $gitweb_project_owner->{$pr} = to_utf8($ow);
2774                 }
2775                 close $fd;
2776         }
2777 }
2778
2779 sub git_get_project_owner {
2780         my $project = shift;
2781         my $owner;
2782
2783         return undef unless $project;
2784         $git_dir = "$projectroot/$project";
2785
2786         if (!defined $gitweb_project_owner) {
2787                 git_get_project_list_from_file();
2788         }
2789
2790         if (exists $gitweb_project_owner->{$project}) {
2791                 $owner = $gitweb_project_owner->{$project};
2792         }
2793         if (!defined $owner){
2794                 $owner = git_get_project_config('owner');
2795         }
2796         if (!defined $owner) {
2797                 $owner = get_file_owner("$git_dir");
2798         }
2799
2800         return $owner;
2801 }
2802
2803 sub git_get_last_activity {
2804         my ($path) = @_;
2805         my $fd;
2806
2807         $git_dir = "$projectroot/$path";
2808         open($fd, "-|", git_cmd(), 'for-each-ref',
2809              '--format=%(committer)',
2810              '--sort=-committerdate',
2811              '--count=1',
2812              'refs/heads') or return;
2813         my $most_recent = <$fd>;
2814         close $fd or return;
2815         if (defined $most_recent &&
2816             $most_recent =~ / (\d+) [-+][01]\d\d\d$/) {
2817                 my $timestamp = $1;
2818                 my $age = time - $timestamp;
2819                 return ($age, age_string($age));
2820         }
2821         return (undef, undef);
2822 }
2823
2824 # Implementation note: when a single remote is wanted, we cannot use 'git
2825 # remote show -n' because that command always work (assuming it's a remote URL
2826 # if it's not defined), and we cannot use 'git remote show' because that would
2827 # try to make a network roundtrip. So the only way to find if that particular
2828 # remote is defined is to walk the list provided by 'git remote -v' and stop if
2829 # and when we find what we want.
2830 sub git_get_remotes_list {
2831         my $wanted = shift;
2832         my %remotes = ();
2833
2834         open my $fd, '-|' , git_cmd(), 'remote', '-v';
2835         return unless $fd;
2836         while (my $remote = <$fd>) {
2837                 chomp $remote;
2838                 $remote =~ s!\t(.*?)\s+\((\w+)\)$!!;
2839                 next if $wanted and not $remote eq $wanted;
2840                 my ($url, $key) = ($1, $2);
2841
2842                 $remotes{$remote} ||= { 'heads' => () };
2843                 $remotes{$remote}{$key} = $url;
2844         }
2845         close $fd or return;
2846         return wantarray ? %remotes : \%remotes;
2847 }
2848
2849 # Takes a hash of remotes as first parameter and fills it by adding the
2850 # available remote heads for each of the indicated remotes.
2851 sub fill_remote_heads {
2852         my $remotes = shift;
2853         my @heads = map { "remotes/$_" } keys %$remotes;
2854         my @remoteheads = git_get_heads_list(undef, @heads);
2855         foreach my $remote (keys %$remotes) {
2856                 $remotes->{$remote}{'heads'} = [ grep {
2857                         $_->{'name'} =~ s!^$remote/!!
2858                         } @remoteheads ];
2859         }
2860 }
2861
2862 sub git_get_references {
2863         my $type = shift || "";
2864         my %refs;
2865         # 5dc01c595e6c6ec9ccda4f6f69c131c0dd945f8c refs/tags/v2.6.11
2866         # c39ae07f393806ccf406ef966e9a15afc43cc36a refs/tags/v2.6.11^{}
2867         open my $fd, "-|", git_cmd(), "show-ref", "--dereference",
2868                 ($type ? ("--", "refs/$type") : ()) # use -- <pattern> if $type
2869                 or return;
2870
2871         while (my $line = <$fd>) {
2872                 chomp $line;
2873                 if ($line =~ m!^([0-9a-fA-F]{40})\srefs/($type.*)$!) {
2874                         if (defined $refs{$1}) {
2875                                 push @{$refs{$1}}, $2;
2876                         } else {
2877                                 $refs{$1} = [ $2 ];
2878                         }
2879                 }
2880         }
2881         close $fd or return;
2882         return \%refs;
2883 }
2884
2885 sub git_get_rev_name_tags {
2886         my $hash = shift || return undef;
2887
2888         open my $fd, "-|", git_cmd(), "name-rev", "--tags", $hash
2889                 or return;
2890         my $name_rev = <$fd>;
2891         close $fd;
2892
2893         if ($name_rev =~ m|^$hash tags/(.*)$|) {
2894                 return $1;
2895         } else {
2896                 # catches also '$hash undefined' output
2897                 return undef;
2898         }
2899 }
2900
2901 ## ----------------------------------------------------------------------
2902 ## parse to hash functions
2903
2904 sub parse_date {
2905         my $epoch = shift;
2906         my $tz = shift || "-0000";
2907
2908         my %date;
2909         my @months = ("Jan", "Feb", "Mar", "Apr", "May", "Jun", "Jul", "Aug", "Sep", "Oct", "Nov", "Dec");
2910         my @days = ("Sun", "Mon", "Tue", "Wed", "Thu", "Fri", "Sat");
2911         my ($sec, $min, $hour, $mday, $mon, $year, $wday, $yday) = gmtime($epoch);
2912         $date{'hour'} = $hour;
2913         $date{'minute'} = $min;
2914         $date{'mday'} = $mday;
2915         $date{'day'} = $days[$wday];
2916         $date{'month'} = $months[$mon];
2917         $date{'rfc2822'}   = sprintf "%s, %d %s %4d %02d:%02d:%02d +0000",
2918                              $days[$wday], $mday, $months[$mon], 1900+$year, $hour ,$min, $sec;
2919         $date{'mday-time'} = sprintf "%d %s %02d:%02d",
2920                              $mday, $months[$mon], $hour ,$min;
2921         $date{'iso-8601'}  = sprintf "%04d-%02d-%02dT%02d:%02d:%02dZ",
2922                              1900+$year, 1+$mon, $mday, $hour ,$min, $sec;
2923
2924         my ($tz_sign, $tz_hour, $tz_min) =
2925                 ($tz =~ m/^([-+])(\d\d)(\d\d)$/);
2926         $tz_sign = ($tz_sign eq '-' ? -1 : +1);
2927         my $local = $epoch + $tz_sign*((($tz_hour*60) + $tz_min)*60);
2928         ($sec, $min, $hour, $mday, $mon, $year, $wday, $yday) = gmtime($local);
2929         $date{'hour_local'} = $hour;
2930         $date{'minute_local'} = $min;
2931         $date{'tz_local'} = $tz;
2932         $date{'iso-tz'} = sprintf("%04d-%02d-%02d %02d:%02d:%02d %s",
2933                                   1900+$year, $mon+1, $mday,
2934                                   $hour, $min, $sec, $tz);
2935         return %date;
2936 }
2937
2938 sub parse_tag {
2939         my $tag_id = shift;
2940         my %tag;
2941         my @comment;
2942
2943         open my $fd, "-|", git_cmd(), "cat-file", "tag", $tag_id or return;
2944         $tag{'id'} = $tag_id;
2945         while (my $line = <$fd>) {
2946                 chomp $line;
2947                 if ($line =~ m/^object ([0-9a-fA-F]{40})$/) {
2948                         $tag{'object'} = $1;
2949                 } elsif ($line =~ m/^type (.+)$/) {
2950                         $tag{'type'} = $1;
2951                 } elsif ($line =~ m/^tag (.+)$/) {
2952                         $tag{'name'} = $1;
2953                 } elsif ($line =~ m/^tagger (.*) ([0-9]+) (.*)$/) {
2954                         $tag{'author'} = $1;
2955                         $tag{'author_epoch'} = $2;
2956                         $tag{'author_tz'} = $3;
2957                         if ($tag{'author'} =~ m/^([^<]+) <([^>]*)>/) {
2958                                 $tag{'author_name'}  = $1;
2959                                 $tag{'author_email'} = $2;
2960                         } else {
2961                                 $tag{'author_name'} = $tag{'author'};
2962                         }
2963                 } elsif ($line =~ m/--BEGIN/) {
2964                         push @comment, $line;
2965                         last;
2966                 } elsif ($line eq "") {
2967                         last;
2968                 }
2969         }
2970         push @comment, <$fd>;
2971         $tag{'comment'} = \@comment;
2972         close $fd or return;
2973         if (!defined $tag{'name'}) {
2974                 return
2975         };
2976         return %tag
2977 }
2978
2979 sub parse_commit_text {
2980         my ($commit_text, $withparents) = @_;
2981         my @commit_lines = split '\n', $commit_text;
2982         my %co;
2983
2984         pop @commit_lines; # Remove '\0'
2985
2986         if (! @commit_lines) {
2987                 return;
2988         }
2989
2990         my $header = shift @commit_lines;
2991         if ($header !~ m/^[0-9a-fA-F]{40}/) {
2992                 return;
2993         }
2994         ($co{'id'}, my @parents) = split ' ', $header;
2995         while (my $line = shift @commit_lines) {
2996                 last if $line eq "\n";
2997                 if ($line =~ m/^tree ([0-9a-fA-F]{40})$/) {
2998                         $co{'tree'} = $1;
2999                 } elsif ((!defined $withparents) && ($line =~ m/^parent ([0-9a-fA-F]{40})$/)) {
3000                         push @parents, $1;
3001                 } elsif ($line =~ m/^author (.*) ([0-9]+) (.*)$/) {
3002                         $co{'author'} = to_utf8($1);
3003                         $co{'author_epoch'} = $2;
3004                         $co{'author_tz'} = $3;
3005                         if ($co{'author'} =~ m/^([^<]+) <([^>]*)>/) {
3006                                 $co{'author_name'}  = $1;
3007                                 $co{'author_email'} = $2;
3008                         } else {
3009                                 $co{'author_name'} = $co{'author'};
3010                         }
3011                 } elsif ($line =~ m/^committer (.*) ([0-9]+) (.*)$/) {
3012                         $co{'committer'} = to_utf8($1);
3013                         $co{'committer_epoch'} = $2;
3014                         $co{'committer_tz'} = $3;
3015                         if ($co{'committer'} =~ m/^([^<]+) <([^>]*)>/) {
3016                                 $co{'committer_name'}  = $1;
3017                                 $co{'committer_email'} = $2;
3018                         } else {
3019                                 $co{'committer_name'} = $co{'committer'};
3020                         }
3021                 }
3022         }
3023         if (!defined $co{'tree'}) {
3024                 return;
3025         };
3026         $co{'parents'} = \@parents;
3027         $co{'parent'} = $parents[0];
3028
3029         foreach my $title (@commit_lines) {
3030                 $title =~ s/^    //;
3031                 if ($title ne "") {
3032                         $co{'title'} = chop_str($title, 80, 5);
3033                         # remove leading stuff of merges to make the interesting part visible
3034                         if (length($title) > 50) {
3035                                 $title =~ s/^Automatic //;
3036                                 $title =~ s/^merge (of|with) /Merge ... /i;
3037                                 if (length($title) > 50) {
3038                                         $title =~ s/(http|rsync):\/\///;
3039                                 }
3040                                 if (length($title) > 50) {
3041                                         $title =~ s/(master|www|rsync)\.//;
3042                                 }
3043                                 if (length($title) > 50) {
3044                                         $title =~ s/kernel.org:?//;
3045                                 }
3046                                 if (length($title) > 50) {
3047                                         $title =~ s/\/pub\/scm//;
3048                                 }
3049                         }
3050                         $co{'title_short'} = chop_str($title, 50, 5);
3051                         last;
3052                 }
3053         }
3054         if (! defined $co{'title'} || $co{'title'} eq "") {
3055                 $co{'title'} = $co{'title_short'} = '(no commit message)';
3056         }
3057         # remove added spaces
3058         foreach my $line (@commit_lines) {
3059                 $line =~ s/^    //;
3060         }
3061         $co{'comment'} = \@commit_lines;
3062
3063         my $age = time - $co{'committer_epoch'};
3064         $co{'age'} = $age;
3065         $co{'age_string'} = age_string($age);
3066         my ($sec, $min, $hour, $mday, $mon, $year, $wday, $yday) = gmtime($co{'committer_epoch'});
3067         if ($age > 60*60*24*7*2) {
3068                 $co{'age_string_date'} = sprintf "%4i-%02u-%02i", 1900 + $year, $mon+1, $mday;
3069                 $co{'age_string_age'} = $co{'age_string'};
3070         } else {
3071                 $co{'age_string_date'} = $co{'age_string'};
3072                 $co{'age_string_age'} = sprintf "%4i-%02u-%02i", 1900 + $year, $mon+1, $mday;
3073         }
3074         return %co;
3075 }
3076
3077 sub parse_commit {
3078         my ($commit_id) = @_;
3079         my %co;
3080
3081         local $/ = "\0";
3082
3083         open my $fd, "-|", git_cmd(), "rev-list",
3084                 "--parents",
3085                 "--header",
3086                 "--max-count=1",
3087                 $commit_id,
3088                 "--",
3089                 or die_error(500, "Open git-rev-list failed");
3090         %co = parse_commit_text(<$fd>, 1);
3091         close $fd;
3092
3093         return %co;
3094 }
3095
3096 sub parse_commits {
3097         my ($commit_id, $maxcount, $skip, $filename, @args) = @_;
3098         my @cos;
3099
3100         $maxcount ||= 1;
3101         $skip ||= 0;
3102
3103         local $/ = "\0";
3104
3105         open my $fd, "-|", git_cmd(), "rev-list",
3106                 "--header",
3107                 @args,
3108                 ("--max-count=" . $maxcount),
3109                 ("--skip=" . $skip),
3110                 @extra_options,
3111                 $commit_id,
3112                 "--",
3113                 ($filename ? ($filename) : ())
3114                 or die_error(500, "Open git-rev-list failed");
3115         while (my $line = <$fd>) {
3116                 my %co = parse_commit_text($line);
3117                 push @cos, \%co;
3118         }
3119         close $fd;
3120
3121         return wantarray ? @cos : \@cos;
3122 }
3123
3124 # parse line of git-diff-tree "raw" output
3125 sub parse_difftree_raw_line {
3126         my $line = shift;
3127         my %res;
3128
3129         # ':100644 100644 03b218260e99b78c6df0ed378e59ed9205ccc96d 3b93d5e7cc7f7dd4ebed13a5cc1a4ad976fc94d8 M   ls-files.c'
3130         # ':100644 100644 7f9281985086971d3877aca27704f2aaf9c448ce bc190ebc71bbd923f2b728e505408f5e54bd073a M   rev-tree.c'
3131         if ($line =~ m/^:([0-7]{6}) ([0-7]{6}) ([0-9a-fA-F]{40}) ([0-9a-fA-F]{40}) (.)([0-9]{0,3})\t(.*)$/) {
3132                 $res{'from_mode'} = $1;
3133                 $res{'to_mode'} = $2;
3134                 $res{'from_id'} = $3;
3135                 $res{'to_id'} = $4;
3136                 $res{'status'} = $5;
3137                 $res{'similarity'} = $6;
3138                 if ($res{'status'} eq 'R' || $res{'status'} eq 'C') { # renamed or copied
3139                         ($res{'from_file'}, $res{'to_file'}) = map { unquote($_) } split("\t", $7);
3140                 } else {
3141                         $res{'from_file'} = $res{'to_file'} = $res{'file'} = unquote($7);
3142                 }
3143         }
3144         # '::100755 100755 100755 60e79ca1b01bc8b057abe17ddab484699a7f5fdb 94067cc5f73388f33722d52ae02f44692bc07490 94067cc5f73388f33722d52ae02f44692bc07490 MR git-gui/git-gui.sh'
3145         # combined diff (for merge commit)
3146         elsif ($line =~ s/^(::+)((?:[0-7]{6} )+)((?:[0-9a-fA-F]{40} )+)([a-zA-Z]+)\t(.*)$//) {
3147                 $res{'nparents'}  = length($1);
3148                 $res{'from_mode'} = [ split(' ', $2) ];
3149                 $res{'to_mode'} = pop @{$res{'from_mode'}};
3150                 $res{'from_id'} = [ split(' ', $3) ];
3151                 $res{'to_id'} = pop @{$res{'from_id'}};
3152                 $res{'status'} = [ split('', $4) ];
3153                 $res{'to_file'} = unquote($5);
3154         }
3155         # 'c512b523472485aef4fff9e57b229d9d243c967f'
3156         elsif ($line =~ m/^([0-9a-fA-F]{40})$/) {
3157                 $res{'commit'} = $1;
3158         }
3159
3160         return wantarray ? %res : \%res;
3161 }
3162
3163 # wrapper: return parsed line of git-diff-tree "raw" output
3164 # (the argument might be raw line, or parsed info)
3165 sub parsed_difftree_line {
3166         my $line_or_ref = shift;
3167
3168         if (ref($line_or_ref) eq "HASH") {
3169                 # pre-parsed (or generated by hand)
3170                 return $line_or_ref;
3171         } else {
3172                 return parse_difftree_raw_line($line_or_ref);
3173         }
3174 }
3175
3176 # parse line of git-ls-tree output
3177 sub parse_ls_tree_line {
3178         my $line = shift;
3179         my %opts = @_;
3180         my %res;
3181
3182         if ($opts{'-l'}) {
3183                 #'100644 blob 0fa3f3a66fb6a137f6ec2c19351ed4d807070ffa   16717  panic.c'
3184                 $line =~ m/^([0-9]+) (.+) ([0-9a-fA-F]{40}) +(-|[0-9]+)\t(.+)$/s;
3185
3186                 $res{'mode'} = $1;
3187                 $res{'type'} = $2;
3188                 $res{'hash'} = $3;
3189                 $res{'size'} = $4;
3190                 if ($opts{'-z'}) {
3191                         $res{'name'} = $5;
3192                 } else {
3193                         $res{'name'} = unquote($5);
3194                 }
3195         } else {
3196                 #'100644 blob 0fa3f3a66fb6a137f6ec2c19351ed4d807070ffa  panic.c'
3197                 $line =~ m/^([0-9]+) (.+) ([0-9a-fA-F]{40})\t(.+)$/s;
3198
3199                 $res{'mode'} = $1;
3200                 $res{'type'} = $2;
3201                 $res{'hash'} = $3;
3202                 if ($opts{'-z'}) {
3203                         $res{'name'} = $4;
3204                 } else {
3205                         $res{'name'} = unquote($4);
3206                 }
3207         }
3208
3209         return wantarray ? %res : \%res;
3210 }
3211
3212 # generates _two_ hashes, references to which are passed as 2 and 3 argument
3213 sub parse_from_to_diffinfo {
3214         my ($diffinfo, $from, $to, @parents) = @_;
3215
3216         if ($diffinfo->{'nparents'}) {
3217                 # combined diff
3218                 $from->{'file'} = [];
3219                 $from->{'href'} = [];
3220                 fill_from_file_info($diffinfo, @parents)
3221                         unless exists $diffinfo->{'from_file'};
3222                 for (my $i = 0; $i < $diffinfo->{'nparents'}; $i++) {
3223                         $from->{'file'}[$i] =
3224                                 defined $diffinfo->{'from_file'}[$i] ?
3225                                         $diffinfo->{'from_file'}[$i] :
3226                                         $diffinfo->{'to_file'};
3227                         if ($diffinfo->{'status'}[$i] ne "A") { # not new (added) file
3228                                 $from->{'href'}[$i] = href(action=>"blob",
3229                                                            hash_base=>$parents[$i],
3230                                                            hash=>$diffinfo->{'from_id'}[$i],
3231                                                            file_name=>$from->{'file'}[$i]);
3232                         } else {
3233                                 $from->{'href'}[$i] = undef;
3234                         }
3235                 }
3236         } else {
3237                 # ordinary (not combined) diff
3238                 $from->{'file'} = $diffinfo->{'from_file'};
3239                 if ($diffinfo->{'status'} ne "A") { # not new (added) file
3240                         $from->{'href'} = href(action=>"blob", hash_base=>$hash_parent,
3241                                                hash=>$diffinfo->{'from_id'},
3242                                                file_name=>$from->{'file'});
3243                 } else {
3244                         delete $from->{'href'};
3245                 }
3246         }
3247
3248         $to->{'file'} = $diffinfo->{'to_file'};
3249         if (!is_deleted($diffinfo)) { # file exists in result
3250                 $to->{'href'} = href(action=>"blob", hash_base=>$hash,
3251                                      hash=>$diffinfo->{'to_id'},
3252                                      file_name=>$to->{'file'});
3253         } else {
3254                 delete $to->{'href'};
3255         }
3256 }
3257
3258 ## ......................................................................
3259 ## parse to array of hashes functions
3260
3261 sub git_get_heads_list {
3262         my ($limit, @classes) = @_;
3263         @classes = ('heads') unless @classes;
3264         my @patterns = map { "refs/$_" } @classes;
3265         my @headslist;
3266
3267         open my $fd, '-|', git_cmd(), 'for-each-ref',
3268                 ($limit ? '--count='.($limit+1) : ()), '--sort=-committerdate',
3269                 '--format=%(objectname) %(refname) %(subject)%00%(committer)',
3270                 @patterns
3271                 or return;
3272         while (my $line = <$fd>) {
3273                 my %ref_item;
3274
3275                 chomp $line;
3276                 my ($refinfo, $committerinfo) = split(/\0/, $line);
3277                 my ($hash, $name, $title) = split(' ', $refinfo, 3);
3278                 my ($committer, $epoch, $tz) =
3279                         ($committerinfo =~ /^(.*) ([0-9]+) (.*)$/);
3280                 $ref_item{'fullname'}  = $name;
3281                 $name =~ s!^refs/(?:head|remote)s/!!;
3282
3283                 $ref_item{'name'}  = $name;
3284                 $ref_item{'id'}    = $hash;
3285                 $ref_item{'title'} = $title || '(no commit message)';
3286                 $ref_item{'epoch'} = $epoch;
3287                 if ($epoch) {
3288                         $ref_item{'age'} = age_string(time - $ref_item{'epoch'});
3289                 } else {
3290                         $ref_item{'age'} = "unknown";
3291                 }
3292
3293                 push @headslist, \%ref_item;
3294         }
3295         close $fd;
3296
3297         return wantarray ? @headslist : \@headslist;
3298 }
3299
3300 sub git_get_tags_list {
3301         my $limit = shift;
3302         my @tagslist;
3303
3304         open my $fd, '-|', git_cmd(), 'for-each-ref',
3305                 ($limit ? '--count='.($limit+1) : ()), '--sort=-creatordate',
3306                 '--format=%(objectname) %(objecttype) %(refname) '.
3307                 '%(*objectname) %(*objecttype) %(subject)%00%(creator)',
3308                 'refs/tags'
3309                 or return;
3310         while (my $line = <$fd>) {
3311                 my %ref_item;
3312
3313                 chomp $line;
3314                 my ($refinfo, $creatorinfo) = split(/\0/, $line);
3315                 my ($id, $type, $name, $refid, $reftype, $title) = split(' ', $refinfo, 6);
3316                 my ($creator, $epoch, $tz) =
3317                         ($creatorinfo =~ /^(.*) ([0-9]+) (.*)$/);
3318                 $ref_item{'fullname'} = $name;
3319                 $name =~ s!^refs/tags/!!;
3320
3321                 $ref_item{'type'} = $type;
3322                 $ref_item{'id'} = $id;
3323                 $ref_item{'name'} = $name;
3324                 if ($type eq "tag") {
3325                         $ref_item{'subject'} = $title;
3326                         $ref_item{'reftype'} = $reftype;
3327                         $ref_item{'refid'}   = $refid;
3328                 } else {
3329                         $ref_item{'reftype'} = $type;
3330                         $ref_item{'refid'}   = $id;
3331                 }
3332
3333                 if ($type eq "tag" || $type eq "commit") {
3334                         $ref_item{'epoch'} = $epoch;
3335                         if ($epoch) {
3336                                 $ref_item{'age'} = age_string(time - $ref_item{'epoch'});
3337                         } else {
3338                                 $ref_item{'age'} = "unknown";
3339                         }
3340                 }
3341
3342                 push @tagslist, \%ref_item;
3343         }
3344         close $fd;
3345
3346         return wantarray ? @tagslist : \@tagslist;
3347 }
3348
3349 ## ----------------------------------------------------------------------
3350 ## filesystem-related functions
3351
3352 sub get_file_owner {
3353         my $path = shift;
3354
3355         my ($dev, $ino, $mode, $nlink, $st_uid, $st_gid, $rdev, $size) = stat($path);
3356         my ($name, $passwd, $uid, $gid, $quota, $comment, $gcos, $dir, $shell) = getpwuid($st_uid);
3357         if (!defined $gcos) {
3358                 return undef;
3359         }
3360         my $owner = $gcos;
3361         $owner =~ s/[,;].*$//;
3362         return to_utf8($owner);
3363 }
3364
3365 # assume that file exists
3366 sub insert_file {
3367         my $filename = shift;
3368
3369         open my $fd, '<', $filename;
3370         print map { to_utf8($_) } <$fd>;
3371         close $fd;
3372 }
3373
3374 ## ......................................................................
3375 ## mimetype related functions
3376
3377 sub mimetype_guess_file {
3378         my $filename = shift;
3379         my $mimemap = shift;
3380         -r $mimemap or return undef;
3381
3382         my %mimemap;
3383         open(my $mh, '<', $mimemap) or return undef;
3384         while (<$mh>) {
3385                 next if m/^#/; # skip comments
3386                 my ($mimetype, $exts) = split(/\t+/);
3387                 if (defined $exts) {
3388                         my @exts = split(/\s+/, $exts);
3389                         foreach my $ext (@exts) {
3390                                 $mimemap{$ext} = $mimetype;
3391                         }
3392                 }
3393         }
3394         close($mh);
3395
3396         $filename =~ /\.([^.]*)$/;
3397         return $mimemap{$1};
3398 }
3399
3400 sub mimetype_guess {
3401         my $filename = shift;
3402         my $mime;
3403         $filename =~ /\./ or return undef;
3404
3405         if ($mimetypes_file) {
3406                 my $file = $mimetypes_file;
3407                 if ($file !~ m!^/!) { # if it is relative path
3408                         # it is relative to project
3409                         $file = "$projectroot/$project/$file";
3410                 }
3411                 $mime = mimetype_guess_file($filename, $file);
3412         }
3413         $mime ||= mimetype_guess_file($filename, '/etc/mime.types');
3414         return $mime;
3415 }
3416
3417 sub blob_mimetype {
3418         my $fd = shift;
3419         my $filename = shift;
3420
3421         if ($filename) {
3422                 my $mime = mimetype_guess($filename);
3423                 $mime and return $mime;
3424         }
3425
3426         # just in case
3427         return $default_blob_plain_mimetype unless $fd;
3428
3429         if (-T $fd) {
3430                 return 'text/plain';
3431         } elsif (! $filename) {
3432                 return 'application/octet-stream';
3433         } elsif ($filename =~ m/\.png$/i) {
3434                 return 'image/png';
3435         } elsif ($filename =~ m/\.gif$/i) {
3436                 return 'image/gif';
3437         } elsif ($filename =~ m/\.jpe?g$/i) {
3438                 return 'image/jpeg';
3439         } else {
3440                 return 'application/octet-stream';
3441         }
3442 }
3443
3444 sub blob_contenttype {
3445         my ($fd, $file_name, $type) = @_;
3446
3447         $type ||= blob_mimetype($fd, $file_name);
3448         if ($type eq 'text/plain' && defined $default_text_plain_charset) {
3449                 $type .= "; charset=$default_text_plain_charset";
3450         }
3451
3452         return $type;
3453 }
3454
3455 # guess file syntax for syntax highlighting; return undef if no highlighting
3456 # the name of syntax can (in the future) depend on syntax highlighter used
3457 sub guess_file_syntax {
3458         my ($highlight, $mimetype, $file_name) = @_;
3459         return undef unless ($highlight && defined $file_name);
3460         my $basename = basename($file_name, '.in');
3461         return $highlight_basename{$basename}
3462                 if exists $highlight_basename{$basename};
3463
3464         $basename =~ /\.([^.]*)$/;
3465         my $ext = $1 or return undef;
3466         return $highlight_ext{$ext}
3467                 if exists $highlight_ext{$ext};
3468
3469         return undef;
3470 }
3471
3472 # run highlighter and return FD of its output,
3473 # or return original FD if no highlighting
3474 sub run_highlighter {
3475         my ($fd, $highlight, $syntax) = @_;
3476         return $fd unless ($highlight && defined $syntax);
3477
3478         close $fd;
3479         open $fd, quote_command(git_cmd(), "cat-file", "blob", $hash)." | ".
3480                   quote_command($highlight_bin).
3481                   " --replace-tabs=8 --fragment --syntax $syntax |"
3482                 or die_error(500, "Couldn't open file or run syntax highlighter");
3483         return $fd;
3484 }
3485
3486 ## ======================================================================
3487 ## functions printing HTML: header, footer, error page
3488
3489 sub get_page_title {
3490         my $title = to_utf8($site_name);
3491
3492         return $title unless (defined $project);
3493         $title .= " - " . to_utf8($project);
3494
3495         return $title unless (defined $action);
3496         $title .= "/$action"; # $action is US-ASCII (7bit ASCII)
3497
3498         return $title unless (defined $file_name);
3499         $title .= " - " . esc_path($file_name);
3500         if ($action eq "tree" && $file_name !~ m|/$|) {
3501                 $title .= "/";
3502         }
3503
3504         return $title;
3505 }
3506
3507 sub print_feed_meta {
3508         if (defined $project) {
3509                 my %href_params = get_feed_info();
3510                 if (!exists $href_params{'-title'}) {
3511                         $href_params{'-title'} = 'log';
3512                 }
3513
3514                 foreach my $format (qw(RSS Atom)) {
3515                         my $type = lc($format);
3516                         my %link_attr = (
3517                                 '-rel' => 'alternate',
3518                                 '-title' => esc_attr("$project - $href_params{'-title'} - $format feed"),
3519                                 '-type' => "application/$type+xml"
3520                         );
3521
3522                         $href_params{'action'} = $type;
3523                         $link_attr{'-href'} = href(%href_params);
3524                         print "<link ".
3525                               "rel=\"$link_attr{'-rel'}\" ".
3526                               "title=\"$link_attr{'-title'}\" ".
3527                               "href=\"$link_attr{'-href'}\" ".
3528                               "type=\"$link_attr{'-type'}\" ".
3529                               "/>\n";
3530
3531                         $href_params{'extra_options'} = '--no-merges';
3532                         $link_attr{'-href'} = href(%href_params);
3533                         $link_attr{'-title'} .= ' (no merges)';
3534                         print "<link ".
3535                               "rel=\"$link_attr{'-rel'}\" ".
3536                               "title=\"$link_attr{'-title'}\" ".
3537                               "href=\"$link_attr{'-href'}\" ".
3538                               "type=\"$link_attr{'-type'}\" ".
3539                               "/>\n";
3540                 }
3541
3542         } else {
3543                 printf('<link rel="alternate" title="%s projects list" '.
3544                        'href="%s" type="text/plain; charset=utf-8" />'."\n",
3545                        esc_attr($site_name), href(project=>undef, action=>"project_index"));
3546                 printf('<link rel="alternate" title="%s projects feeds" '.
3547                        'href="%s" type="text/x-opml" />'."\n",
3548                        esc_attr($site_name), href(project=>undef, action=>"opml"));
3549         }
3550 }
3551
3552 sub git_header_html {
3553         my $status = shift || "200 OK";
3554         my $expires = shift;
3555         my %opts = @_;
3556
3557         my $title = get_page_title();
3558         my $content_type;
3559         # require explicit support from the UA if we are to send the page as
3560         # 'application/xhtml+xml', otherwise send it as plain old 'text/html'.
3561         # we have to do this because MSIE sometimes globs '*/*', pretending to
3562         # support xhtml+xml but choking when it gets what it asked for.
3563         if (defined $cgi->http('HTTP_ACCEPT') &&
3564             $cgi->http('HTTP_ACCEPT') =~ m/(,|;|\s|^)application\/xhtml\+xml(,|;|\s|$)/ &&
3565             $cgi->Accept('application/xhtml+xml') != 0) {
3566                 $content_type = 'application/xhtml+xml';
3567         } else {
3568                 $content_type = 'text/html';
3569         }
3570         print $cgi->header(-type=>$content_type, -charset => 'utf-8',
3571                            -status=> $status, -expires => $expires)
3572                 unless ($opts{'-no_http_header'});
3573         my $mod_perl_version = $ENV{'MOD_PERL'} ? " $ENV{'MOD_PERL'}" : '';
3574         print <<EOF;
3575 <?xml version="1.0" encoding="utf-8"?>
3576 <!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Strict//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-strict.dtd">
3577 <html xmlns="http://www.w3.org/1999/xhtml" xml:lang="en-US" lang="en-US">
3578 <!-- git web interface version $version, (C) 2005-2006, Kay Sievers <kay.sievers\@vrfy.org>, Christian Gierke -->
3579 <!-- git core binaries version $git_version -->
3580 <head>
3581 <meta http-equiv="content-type" content="$content_type; charset=utf-8"/>
3582 <meta name="generator" content="gitweb/$version git/$git_version$mod_perl_version"/>
3583 <meta name="robots" content="index, nofollow"/>
3584 <title>$title</title>
3585 EOF
3586         # the stylesheet, favicon etc urls won't work correctly with path_info
3587         # unless we set the appropriate base URL
3588         if ($ENV{'PATH_INFO'}) {
3589                 print "<base href=\"".esc_url($base_url)."\" />\n";
3590         }
3591         # print out each stylesheet that exist, providing backwards capability
3592         # for those people who defined $stylesheet in a config file
3593         if (defined $stylesheet) {
3594                 print '<link rel="stylesheet" type="text/css" href="'.esc_url($stylesheet).'"/>'."\n";
3595         } else {
3596                 foreach my $stylesheet (@stylesheets) {
3597                         next unless $stylesheet;
3598                         print '<link rel="stylesheet" type="text/css" href="'.esc_url($stylesheet).'"/>'."\n";
3599                 }
3600         }
3601         print_feed_meta()
3602                 if ($status eq '200 OK');
3603         if (defined $favicon) {
3604                 print qq(<link rel="shortcut icon" href=").esc_url($favicon).qq(" type="image/png" />\n);
3605         }
3606
3607         print "</head>\n" .
3608               "<body>\n";
3609
3610         if (defined $site_header && -f $site_header) {
3611                 insert_file($site_header);
3612         }
3613
3614         print "<div class=\"page_header\">\n";
3615         if (defined $logo) {
3616                 print $cgi->a({-href => esc_url($logo_url),
3617                                -title => $logo_label},
3618                               $cgi->img({-src => esc_url($logo),
3619                                          -width => 72, -height => 27,
3620                                          -alt => "git",
3621                                          -class => "logo"}));
3622         }
3623         print $cgi->a({-href => esc_url($home_link)}, $home_link_str) . " / ";
3624         if (defined $project) {
3625                 print $cgi->a({-href => href(action=>"summary")}, esc_html($project));
3626                 if (defined $action) {
3627                         my $action_print = $action ;
3628                         if (defined $opts{-action_extra}) {
3629                                 $action_print = $cgi->a({-href => href(action=>$action)},
3630                                         $action);
3631                         }
3632                         print " / $action_print";
3633                 }
3634                 if (defined $opts{-action_extra}) {
3635                         print " / $opts{-action_extra}";
3636                 }
3637                 print "\n";
3638         }
3639         print "</div>\n";
3640
3641         my $have_search = gitweb_check_feature('search');
3642         if (defined $project && $have_search) {
3643                 if (!defined $searchtext) {
3644                         $searchtext = "";
3645                 }
3646                 my $search_hash;
3647                 if (defined $hash_base) {
3648                         $search_hash = $hash_base;
3649                 } elsif (defined $hash) {
3650                         $search_hash = $hash;
3651                 } else {
3652                         $search_hash = "HEAD";
3653                 }
3654                 my $action = $my_uri;
3655                 my $use_pathinfo = gitweb_check_feature('pathinfo');
3656                 if ($use_pathinfo) {
3657                         $action .= "/".esc_url($project);
3658                 }
3659                 print $cgi->startform(-method => "get", -action => $action) .
3660                       "<div class=\"search\">\n" .
3661                       (!$use_pathinfo &&
3662                       $cgi->input({-name=>"p", -value=>$project, -type=>"hidden"}) . "\n") .
3663                       $cgi->input({-name=>"a", -value=>"search", -type=>"hidden"}) . "\n" .
3664                       $cgi->input({-name=>"h", -value=>$search_hash, -type=>"hidden"}) . "\n" .
3665                       $cgi->popup_menu(-name => 'st', -default => 'commit',
3666                                        -values => ['commit', 'grep', 'author', 'committer', 'pickaxe']) .
3667                       $cgi->sup($cgi->a({-href => href(action=>"search_help")}, "?")) .
3668                       " search:\n",
3669                       $cgi->textfield(-name => "s", -value => $searchtext) . "\n" .
3670                       "<span title=\"Extended regular expression\">" .
3671                       $cgi->checkbox(-name => 'sr', -value => 1, -label => 're',
3672                                      -checked => $search_use_regexp) .
3673                       "</span>" .
3674                       "</div>" .
3675                       $cgi->end_form() . "\n";
3676         }
3677 }
3678
3679 sub git_footer_html {
3680         my $feed_class = 'rss_logo';
3681
3682         print "<div class=\"page_footer\">\n";
3683         if (defined $project) {
3684                 my $descr = git_get_project_description($project);
3685                 if (defined $descr) {
3686                         print "<div class=\"page_footer_text\">" . esc_html($descr) . "</div>\n";
3687                 }
3688
3689                 my %href_params = get_feed_info();
3690                 if (!%href_params) {
3691                         $feed_class .= ' generic';
3692                 }
3693                 $href_params{'-title'} ||= 'log';
3694
3695                 foreach my $format (qw(RSS Atom)) {
3696                         $href_params{'action'} = lc($format);
3697                         print $cgi->a({-href => href(%href_params),
3698                                       -title => "$href_params{'-title'} $format feed",
3699                                       -class => $feed_class}, $format)."\n";
3700                 }
3701
3702         } else {
3703                 print $cgi->a({-href => href(project=>undef, action=>"opml"),
3704                               -class => $feed_class}, "OPML") . " ";
3705                 print $cgi->a({-href => href(project=>undef, action=>"project_index"),
3706                               -class => $feed_class}, "TXT") . "\n";
3707         }
3708         print "</div>\n"; # class="page_footer"
3709
3710         if (defined $t0 && gitweb_check_feature('timed')) {
3711                 print "<div id=\"generating_info\">\n";
3712                 print 'This page took '.
3713                       '<span id="generating_time" class="time_span">'.
3714                       tv_interval($t0, [ gettimeofday() ]).
3715                       ' seconds </span>'.
3716                       ' and '.
3717                       '<span id="generating_cmd">'.
3718                       $number_of_git_cmds.
3719                       '</span> git commands '.
3720                       " to generate.\n";
3721                 print "</div>\n"; # class="page_footer"
3722         }
3723
3724         if (defined $site_footer && -f $site_footer) {
3725                 insert_file($site_footer);
3726         }
3727
3728         print qq!<script type="text/javascript" src="!.esc_url($javascript).qq!"></script>\n!;
3729         if (defined $action &&
3730             $action eq 'blame_incremental') {
3731                 print qq!<script type="text/javascript">\n!.
3732                       qq!startBlame("!. href(action=>"blame_data", -replay=>1) .qq!",\n!.
3733                       qq!           "!. href() .qq!");\n!.
3734                       qq!</script>\n!;
3735         } elsif (gitweb_check_feature('javascript-actions')) {
3736                 print qq!<script type="text/javascript">\n!.
3737                       qq!window.onload = fixLinks;\n!.
3738                       qq!</script>\n!;
3739         }
3740
3741         print "</body>\n" .
3742               "</html>";
3743 }
3744
3745 # die_error(<http_status_code>, <error_message>[, <detailed_html_description>])
3746 # Example: die_error(404, 'Hash not found')
3747 # By convention, use the following status codes (as defined in RFC 2616):
3748 # 400: Invalid or missing CGI parameters, or
3749 #      requested object exists but has wrong type.
3750 # 403: Requested feature (like "pickaxe" or "snapshot") not enabled on
3751 #      this server or project.
3752 # 404: Requested object/revision/project doesn't exist.
3753 # 500: The server isn't configured properly, or
3754 #      an internal error occurred (e.g. failed assertions caused by bugs), or
3755 #      an unknown error occurred (e.g. the git binary died unexpectedly).
3756 # 503: The server is currently unavailable (because it is overloaded,
3757 #      or down for maintenance).  Generally, this is a temporary state.
3758 sub die_error {
3759         my $status = shift || 500;
3760         my $error = esc_html(shift) || "Internal Server Error";
3761         my $extra = shift;
3762         my %opts = @_;
3763
3764         my %http_responses = (
3765                 400 => '400 Bad Request',
3766                 403 => '403 Forbidden',
3767                 404 => '404 Not Found',
3768                 500 => '500 Internal Server Error',
3769                 503 => '503 Service Unavailable',
3770         );
3771         git_header_html($http_responses{$status}, undef, %opts);
3772         print <<EOF;
3773 <div class="page_body">
3774 <br /><br />
3775 $status - $error
3776 <br />
3777 EOF
3778         if (defined $extra) {
3779                 print "<hr />\n" .
3780                       "$extra\n";
3781         }
3782         print "</div>\n";
3783
3784         git_footer_html();
3785         goto DONE_GITWEB
3786                 unless ($opts{'-error_handler'});
3787 }
3788
3789 ## ----------------------------------------------------------------------
3790 ## functions printing or outputting HTML: navigation
3791
3792 sub git_print_page_nav {
3793         my ($current, $suppress, $head, $treehead, $treebase, $extra) = @_;
3794         $extra = '' if !defined $extra; # pager or formats
3795
3796         my @navs = qw(summary shortlog log commit commitdiff tree);
3797         if ($suppress) {
3798                 @navs = grep { $_ ne $suppress } @navs;
3799         }
3800
3801         my %arg = map { $_ => {action=>$_} } @navs;
3802         if (defined $head) {
3803                 for (qw(commit commitdiff)) {
3804                         $arg{$_}{'hash'} = $head;
3805                 }
3806                 if ($current =~ m/^(tree | log | shortlog | commit | commitdiff | search)$/x) {
3807                         for (qw(shortlog log)) {
3808                                 $arg{$_}{'hash'} = $head;
3809                         }
3810                 }
3811         }
3812
3813         $arg{'tree'}{'hash'} = $treehead if defined $treehead;
3814         $arg{'tree'}{'hash_base'} = $treebase if defined $treebase;
3815
3816         my @actions = gitweb_get_feature('actions');
3817         my %repl = (
3818                 '%' => '%',
3819                 'n' => $project,         # project name
3820                 'f' => $git_dir,         # project path within filesystem
3821                 'h' => $treehead || '',  # current hash ('h' parameter)
3822                 'b' => $treebase || '',  # hash base ('hb' parameter)
3823         );
3824         while (@actions) {
3825                 my ($label, $link, $pos) = splice(@actions,0,3);
3826                 # insert
3827                 @navs = map { $_ eq $pos ? ($_, $label) : $_ } @navs;
3828                 # munch munch
3829                 $link =~ s/%([%nfhb])/$repl{$1}/g;
3830                 $arg{$label}{'_href'} = $link;
3831         }
3832
3833         print "<div class=\"page_nav\">\n" .
3834                 (join " | ",
3835                  map { $_ eq $current ?
3836                        $_ : $cgi->a({-href => ($arg{$_}{_href} ? $arg{$_}{_href} : href(%{$arg{$_}}))}, "$_")
3837                  } @navs);
3838         print "<br/>\n$extra<br/>\n" .
3839               "</div>\n";
3840 }
3841
3842 # returns a submenu for the nagivation of the refs views (tags, heads,
3843 # remotes) with the current view disabled and the remotes view only
3844 # available if the feature is enabled
3845 sub format_ref_views {
3846         my ($current) = @_;
3847         my @ref_views = qw{tags heads};
3848         push @ref_views, 'remotes' if gitweb_check_feature('remote_heads');
3849         return join " | ", map {
3850                 $_ eq $current ? $_ :
3851                 $cgi->a({-href => href(action=>$_)}, $_)
3852         } @ref_views
3853 }
3854
3855 sub format_paging_nav {
3856         my ($action, $page, $has_next_link) = @_;
3857         my $paging_nav;
3858
3859
3860         if ($page > 0) {
3861                 $paging_nav .=
3862                         $cgi->a({-href => href(-replay=>1, page=>undef)}, "first") .
3863                         " &sdot; " .
3864                         $cgi->a({-href => href(-replay=>1, page=>$page-1),
3865                                  -accesskey => "p", -title => "Alt-p"}, "prev");
3866         } else {
3867                 $paging_nav .= "first &sdot; prev";
3868         }
3869
3870         if ($has_next_link) {
3871                 $paging_nav .= " &sdot; " .
3872                         $cgi->a({-href => href(-replay=>1, page=>$page+1),
3873                                  -accesskey => "n", -title => "Alt-n"}, "next");
3874         } else {
3875                 $paging_nav .= " &sdot; next";
3876         }
3877
3878         return $paging_nav;
3879 }
3880
3881 ## ......................................................................
3882 ## functions printing or outputting HTML: div
3883
3884 sub git_print_header_div {
3885         my ($action, $title, $hash, $hash_base) = @_;
3886         my %args = ();
3887
3888         $args{'action'} = $action;
3889         $args{'hash'} = $hash if $hash;
3890         $args{'hash_base'} = $hash_base if $hash_base;
3891
3892         print "<div class=\"header\">\n" .
3893               $cgi->a({-href => href(%args), -class => "title"},
3894               $title ? $title : $action) .
3895               "\n</div>\n";
3896 }
3897
3898 sub format_repo_url {
3899         my ($name, $url) = @_;
3900         return "<tr class=\"metadata_url\"><td>$name</td><td>$url</td></tr>\n";
3901 }
3902
3903 # Group output by placing it in a DIV element and adding a header.
3904 # Options for start_div() can be provided by passing a hash reference as the
3905 # first parameter to the function.
3906 # Options to git_print_header_div() can be provided by passing an array
3907 # reference. This must follow the options to start_div if they are present.
3908 # The content can be a scalar, which is output as-is, a scalar reference, which
3909 # is output after html escaping, an IO handle passed either as *handle or
3910 # *handle{IO}, or a function reference. In the latter case all following
3911 # parameters will be taken as argument to the content function call.
3912 sub git_print_section {
3913         my ($div_args, $header_args, $content);
3914         my $arg = shift;
3915         if (ref($arg) eq 'HASH') {
3916                 $div_args = $arg;
3917                 $arg = shift;
3918         }
3919         if (ref($arg) eq 'ARRAY') {
3920                 $header_args = $arg;
3921                 $arg = shift;
3922         }
3923         $content = $arg;
3924
3925         print $cgi->start_div($div_args);
3926         git_print_header_div(@$header_args);
3927
3928         if (ref($content) eq 'CODE') {
3929                 $content->(@_);
3930         } elsif (ref($content) eq 'SCALAR') {
3931                 print esc_html($$content);
3932         } elsif (ref($content) eq 'GLOB' or ref($content) eq 'IO::Handle') {
3933                 print <$content>;
3934         } elsif (!ref($content) && defined($content)) {
3935                 print $content;
3936         }
3937
3938         print $cgi->end_div;
3939 }
3940
3941 sub print_local_time {
3942         print format_local_time(@_);
3943 }
3944
3945 sub format_local_time {
3946         my $localtime = '';
3947         my %date = @_;
3948         if ($date{'hour_local'} < 6) {
3949                 $localtime .= sprintf(" (<span class=\"atnight\">%02d:%02d</span> %s)",
3950                         $date{'hour_local'}, $date{'minute_local'}, $date{'tz_local'});
3951         } else {
3952                 $localtime .= sprintf(" (%02d:%02d %s)",
3953                         $date{'hour_local'}, $date{'minute_local'}, $date{'tz_local'});
3954         }
3955
3956         return $localtime;
3957 }
3958
3959 # Outputs the author name and date in long form
3960 sub git_print_authorship {
3961         my $co = shift;
3962         my %opts = @_;
3963         my $tag = $opts{-tag} || 'div';
3964         my $author = $co->{'author_name'};
3965
3966         my %ad = parse_date($co->{'author_epoch'}, $co->{'author_tz'});
3967         print "<$tag class=\"author_date\">" .
3968               format_search_author($author, "author", esc_html($author)) .
3969               " [$ad{'rfc2822'}";
3970         print_local_time(%ad) if ($opts{-localtime});
3971         print "]" . git_get_avatar($co->{'author_email'}, -pad_before => 1)
3972                   . "</$tag>\n";
3973 }
3974
3975 # Outputs table rows containing the full author or committer information,
3976 # in the format expected for 'commit' view (& similar).
3977 # Parameters are a commit hash reference, followed by the list of people
3978 # to output information for. If the list is empty it defaults to both
3979 # author and committer.
3980 sub git_print_authorship_rows {
3981         my $co = shift;
3982         # too bad we can't use @people = @_ || ('author', 'committer')
3983         my @people = @_;
3984         @people = ('author', 'committer') unless @people;
3985         foreach my $who (@people) {
3986                 my %wd = parse_date($co->{"${who}_epoch"}, $co->{"${who}_tz"});
3987                 print "<tr><td>$who</td><td>" .
3988                       format_search_author($co->{"${who}_name"}, $who,
3989                                esc_html($co->{"${who}_name"})) . " " .
3990                       format_search_author($co->{"${who}_email"}, $who,
3991                                esc_html("<" . $co->{"${who}_email"} . ">")) .
3992                       "</td><td rowspan=\"2\">" .
3993                       git_get_avatar($co->{"${who}_email"}, -size => 'double') .
3994                       "</td></tr>\n" .
3995                       "<tr>" .
3996                       "<td></td><td> $wd{'rfc2822'}";
3997                 print_local_time(%wd);
3998                 print "</td>" .
3999                       "</tr>\n";
4000         }
4001 }
4002
4003 sub git_print_page_path {
4004         my $name = shift;
4005         my $type = shift;
4006         my $hb = shift;
4007
4008
4009         print "<div class=\"page_path\">";
4010         print $cgi->a({-href => href(action=>"tree", hash_base=>$hb),
4011                       -title => 'tree root'}, to_utf8("[$project]"));
4012         print " / ";
4013         if (defined $name) {
4014                 my @dirname = split '/', $name;
4015                 my $basename = pop @dirname;
4016                 my $fullname = '';
4017
4018                 foreach my $dir (@dirname) {
4019                         $fullname .= ($fullname ? '/' : '') . $dir;
4020                         print $cgi->a({-href => href(action=>"tree", file_name=>$fullname,
4021                                                      hash_base=>$hb),
4022                                       -title => $fullname}, esc_path($dir));
4023                         print " / ";
4024                 }
4025                 if (defined $type && $type eq 'blob') {
4026                         print $cgi->a({-href => href(action=>"blob_plain", file_name=>$file_name,
4027                                                      hash_base=>$hb),
4028                                       -title => $name}, esc_path($basename));
4029                 } elsif (defined $type && $type eq 'tree') {
4030                         print $cgi->a({-href => href(action=>"tree", file_name=>$file_name,
4031                                                      hash_base=>$hb),
4032                                       -title => $name}, esc_path($basename));
4033                         print " / ";
4034                 } else {
4035                         print esc_path($basename);
4036                 }
4037         }
4038         print "<br/></div>\n";
4039 }
4040
4041 sub git_print_log {
4042         my $log = shift;
4043         my %opts = @_;
4044
4045         if ($opts{'-remove_title'}) {
4046                 # remove title, i.e. first line of log
4047                 shift @$log;
4048         }
4049         # remove leading empty lines
4050         while (defined $log->[0] && $log->[0] eq "") {
4051                 shift @$log;
4052         }
4053
4054         # print log
4055         my $signoff = 0;
4056         my $empty = 0;
4057         foreach my $line (@$log) {
4058                 if ($line =~ m/^ *(signed[ \-]off[ \-]by[ :]|acked[ \-]by[ :]|cc[ :])/i) {
4059                         $signoff = 1;
4060                         $empty = 0;
4061                         if (! $opts{'-remove_signoff'}) {
4062                                 print "<span class=\"signoff\">" . esc_html($line) . "</span><br/>\n";
4063                                 next;
4064                         } else {
4065                                 # remove signoff lines
4066                                 next;
4067                         }
4068                 } else {
4069                         $signoff = 0;
4070                 }
4071
4072                 # print only one empty line
4073                 # do not print empty line after signoff
4074                 if ($line eq "") {
4075                         next if ($empty || $signoff);
4076                         $empty = 1;
4077                 } else {
4078                         $empty = 0;
4079                 }
4080
4081                 print format_log_line_html($line) . "<br/>\n";
4082         }
4083
4084         if ($opts{'-final_empty_line'}) {
4085                 # end with single empty line
4086                 print "<br/>\n" unless $empty;
4087         }
4088 }
4089
4090 # return link target (what link points to)
4091 sub git_get_link_target {
4092         my $hash = shift;
4093         my $link_target;
4094
4095         # read link
4096         open my $fd, "-|", git_cmd(), "cat-file", "blob", $hash
4097                 or return;
4098         {
4099                 local $/ = undef;
4100                 $link_target = <$fd>;
4101         }
4102         close $fd
4103                 or return;
4104
4105         return $link_target;
4106 }
4107
4108 # given link target, and the directory (basedir) the link is in,
4109 # return target of link relative to top directory (top tree);
4110 # return undef if it is not possible (including absolute links).
4111 sub normalize_link_target {
4112         my ($link_target, $basedir) = @_;
4113
4114         # absolute symlinks (beginning with '/') cannot be normalized
4115         return if (substr($link_target, 0, 1) eq '/');
4116
4117         # normalize link target to path from top (root) tree (dir)
4118         my $path;
4119         if ($basedir) {
4120                 $path = $basedir . '/' . $link_target;
4121         } else {
4122                 # we are in top (root) tree (dir)
4123                 $path = $link_target;
4124         }
4125
4126         # remove //, /./, and /../
4127         my @path_parts;
4128         foreach my $part (split('/', $path)) {
4129                 # discard '.' and ''
4130                 next if (!$part || $part eq '.');
4131                 # handle '..'
4132                 if ($part eq '..') {
4133                         if (@path_parts) {
4134                                 pop @path_parts;
4135                         } else {
4136                                 # link leads outside repository (outside top dir)
4137                                 return;
4138                         }
4139                 } else {
4140                         push @path_parts, $part;
4141                 }
4142         }
4143         $path = join('/', @path_parts);
4144
4145         return $path;
4146 }
4147
4148 # print tree entry (row of git_tree), but without encompassing <tr> element
4149 sub git_print_tree_entry {
4150         my ($t, $basedir, $hash_base, $have_blame) = @_;
4151
4152         my %base_key = ();
4153         $base_key{'hash_base'} = $hash_base if defined $hash_base;
4154
4155         # The format of a table row is: mode list link.  Where mode is
4156         # the mode of the entry, list is the name of the entry, an href,
4157         # and link is the action links of the entry.
4158
4159         print "<td class=\"mode\">" . mode_str($t->{'mode'}) . "</td>\n";
4160         if (exists $t->{'size'}) {
4161                 print "<td class=\"size\">$t->{'size'}</td>\n";
4162         }
4163         if ($t->{'type'} eq "blob") {
4164                 print "<td class=\"list\">" .
4165                         $cgi->a({-href => href(action=>"blob", hash=>$t->{'hash'},
4166                                                file_name=>"$basedir$t->{'name'}", %base_key),
4167                                 -class => "list"}, esc_path($t->{'name'}));
4168                 if (S_ISLNK(oct $t->{'mode'})) {
4169                         my $link_target = git_get_link_target($t->{'hash'});
4170                         if ($link_target) {
4171                                 my $norm_target = normalize_link_target($link_target, $basedir);
4172                                 if (defined $norm_target) {
4173                                         print " -> " .
4174                                               $cgi->a({-href => href(action=>"object", hash_base=>$hash_base,
4175                                                                      file_name=>$norm_target),
4176                                                        -title => $norm_target}, esc_path($link_target));
4177                                 } else {
4178                                         print " -> " . esc_path($link_target);
4179                                 }
4180                         }
4181                 }
4182                 print "</td>\n";
4183                 print "<td class=\"link\">";
4184                 print $cgi->a({-href => href(action=>"blob", hash=>$t->{'hash'},
4185                                              file_name=>"$basedir$t->{'name'}", %base_key)},
4186                               "blob");
4187                 if ($have_blame) {
4188                         print " | " .
4189                               $cgi->a({-href => href(action=>"blame", hash=>$t->{'hash'},
4190                                                      file_name=>"$basedir$t->{'name'}", %base_key)},
4191                                       "blame");
4192                 }
4193                 if (defined $hash_base) {
4194                         print " | " .
4195                               $cgi->a({-href => href(action=>"history", hash_base=>$hash_base,
4196                                                      hash=>$t->{'hash'}, file_name=>"$basedir$t->{'name'}")},
4197                                       "history");
4198                 }
4199                 print " | " .
4200                         $cgi->a({-href => href(action=>"blob_plain", hash_base=>$hash_base,
4201                                                file_name=>"$basedir$t->{'name'}")},
4202                                 "raw");
4203                 print "</td>\n";
4204
4205         } elsif ($t->{'type'} eq "tree") {
4206                 print "<td class=\"list\">";
4207                 print $cgi->a({-href => href(action=>"tree", hash=>$t->{'hash'},
4208                                              file_name=>"$basedir$t->{'name'}",
4209                                              %base_key)},
4210                               esc_path($t->{'name'}));
4211                 print "</td>\n";
4212                 print "<td class=\"link\">";
4213                 print $cgi->a({-href => href(action=>"tree", hash=>$t->{'hash'},
4214                                              file_name=>"$basedir$t->{'name'}",
4215                                              %base_key)},
4216                               "tree");
4217                 if (defined $hash_base) {
4218                         print " | " .
4219                               $cgi->a({-href => href(action=>"history", hash_base=>$hash_base,
4220                                                      file_name=>"$basedir$t->{'name'}")},
4221                                       "history");
4222                 }
4223                 print "</td>\n";
4224         } else {
4225                 # unknown object: we can only present history for it
4226                 # (this includes 'commit' object, i.e. submodule support)
4227                 print "<td class=\"list\">" .
4228                       esc_path($t->{'name'}) .
4229                       "</td>\n";
4230                 print "<td class=\"link\">";
4231                 if (defined $hash_base) {
4232                         print $cgi->a({-href => href(action=>"history",
4233                                                      hash_base=>$hash_base,
4234                                                      file_name=>"$basedir$t->{'name'}")},
4235                                       "history");
4236                 }
4237                 print "</td>\n";
4238         }
4239 }
4240
4241 ## ......................................................................
4242 ## functions printing large fragments of HTML
4243
4244 # get pre-image filenames for merge (combined) diff
4245 sub fill_from_file_info {
4246         my ($diff, @parents) = @_;
4247
4248         $diff->{'from_file'} = [ ];
4249         $diff->{'from_file'}[$diff->{'nparents'} - 1] = undef;
4250         for (my $i = 0; $i < $diff->{'nparents'}; $i++) {
4251                 if ($diff->{'status'}[$i] eq 'R' ||
4252                     $diff->{'status'}[$i] eq 'C') {
4253                         $diff->{'from_file'}[$i] =
4254                                 git_get_path_by_hash($parents[$i], $diff->{'from_id'}[$i]);
4255                 }
4256         }
4257
4258         return $diff;
4259 }
4260
4261 # is current raw difftree line of file deletion
4262 sub is_deleted {
4263         my $diffinfo = shift;
4264
4265         return $diffinfo->{'to_id'} eq ('0' x 40);
4266 }
4267
4268 # does patch correspond to [previous] difftree raw line
4269 # $diffinfo  - hashref of parsed raw diff format
4270 # $patchinfo - hashref of parsed patch diff format
4271 #              (the same keys as in $diffinfo)
4272 sub is_patch_split {
4273         my ($diffinfo, $patchinfo) = @_;
4274
4275         return defined $diffinfo && defined $patchinfo
4276                 && $diffinfo->{'to_file'} eq $patchinfo->{'to_file'};
4277 }
4278
4279
4280 sub git_difftree_body {
4281         my ($difftree, $hash, @parents) = @_;
4282         my ($parent) = $parents[0];
4283         my $have_blame = gitweb_check_feature('blame');
4284         print "<div class=\"list_head\">\n";
4285         if ($#{$difftree} > 10) {
4286                 print(($#{$difftree} + 1) . " files changed:\n");
4287         }
4288         print "</div>\n";
4289
4290         print "<table class=\"" .
4291               (@parents > 1 ? "combined " : "") .
4292               "diff_tree\">\n";
4293
4294         # header only for combined diff in 'commitdiff' view
4295         my $has_header = @$difftree && @parents > 1 && $action eq 'commitdiff';
4296         if ($has_header) {
4297                 # table header
4298                 print "<thead><tr>\n" .
4299                        "<th></th><th></th>\n"; # filename, patchN link
4300                 for (my $i = 0; $i < @parents; $i++) {
4301                         my $par = $parents[$i];
4302                         print "<th>" .
4303                               $cgi->a({-href => href(action=>"commitdiff",
4304                                                      hash=>$hash, hash_parent=>$par),
4305                                        -title => 'commitdiff to parent number ' .
4306                                                   ($i+1) . ': ' . substr($par,0,7)},
4307                                       $i+1) .
4308                               "&nbsp;</th>\n";
4309                 }
4310                 print "</tr></thead>\n<tbody>\n";
4311         }
4312
4313         my $alternate = 1;
4314         my $patchno = 0;
4315         foreach my $line (@{$difftree}) {
4316                 my $diff = parsed_difftree_line($line);
4317
4318                 if ($alternate) {
4319                         print "<tr class=\"dark\">\n";
4320                 } else {
4321                         print "<tr class=\"light\">\n";
4322                 }
4323                 $alternate ^= 1;
4324
4325                 if (exists $diff->{'nparents'}) { # combined diff
4326
4327                         fill_from_file_info($diff, @parents)
4328                                 unless exists $diff->{'from_file'};
4329
4330                         if (!is_deleted($diff)) {
4331                                 # file exists in the result (child) commit
4332                                 print "<td>" .
4333                                       $cgi->a({-href => href(action=>"blob", hash=>$diff->{'to_id'},
4334                                                              file_name=>$diff->{'to_file'},
4335                                                              hash_base=>$hash),
4336                                               -class => "list"}, esc_path($diff->{'to_file'})) .
4337                                       "</td>\n";
4338                         } else {
4339                                 print "<td>" .
4340                                       esc_path($diff->{'to_file'}) .
4341                                       "</td>\n";
4342                         }
4343
4344                         if ($action eq 'commitdiff') {
4345                                 # link to patch
4346                                 $patchno++;
4347                                 print "<td class=\"link\">" .
4348                                       $cgi->a({-href => href(-anchor=>"patch$patchno")},
4349                                               "patch") .
4350                                       " | " .
4351                                       "</td>\n";
4352                         }
4353
4354                         my $has_history = 0;
4355                         my $not_deleted = 0;
4356                         for (my $i = 0; $i < $diff->{'nparents'}; $i++) {
4357                                 my $hash_parent = $parents[$i];
4358                                 my $from_hash = $diff->{'from_id'}[$i];
4359                                 my $from_path = $diff->{'from_file'}[$i];
4360                                 my $status = $diff->{'status'}[$i];
4361
4362                                 $has_history ||= ($status ne 'A');
4363                                 $not_deleted ||= ($status ne 'D');
4364
4365                                 if ($status eq 'A') {
4366                                         print "<td  class=\"link\" align=\"right\"> | </td>\n";
4367                                 } elsif ($status eq 'D') {
4368                                         print "<td class=\"link\">" .
4369                                               $cgi->a({-href => href(action=>"blob",
4370                                                                      hash_base=>$hash,
4371                                                                      hash=>$from_hash,
4372                                                                      file_name=>$from_path)},
4373                                                       "blob" . ($i+1)) .
4374                                               " | </td>\n";
4375                                 } else {
4376                                         if ($diff->{'to_id'} eq $from_hash) {
4377                                                 print "<td class=\"link nochange\">";
4378                                         } else {
4379                                                 print "<td class=\"link\">";
4380                                         }
4381                                         print $cgi->a({-href => href(action=>"blobdiff",
4382                                                                      hash=>$diff->{'to_id'},
4383                                                                      hash_parent=>$from_hash,
4384                                                                      hash_base=>$hash,
4385                                                                      hash_parent_base=>$hash_parent,
4386                                                                      file_name=>$diff->{'to_file'},
4387                                                                      file_parent=>$from_path)},
4388                                                       "diff" . ($i+1)) .
4389                                               " | </td>\n";
4390                                 }
4391                         }
4392
4393                         print "<td class=\"link\">";
4394                         if ($not_deleted) {
4395                                 print $cgi->a({-href => href(action=>"blob",
4396                                                              hash=>$diff->{'to_id'},
4397                                                              file_name=>$diff->{'to_file'},
4398                                                              hash_base=>$hash)},
4399                                               "blob");
4400                                 print " | " if ($has_history);
4401                         }
4402                         if ($has_history) {
4403                                 print $cgi->a({-href => href(action=>"history",
4404                                                              file_name=>$diff->{'to_file'},
4405                                                              hash_base=>$hash)},
4406                                               "history");
4407                         }
4408                         print "</td>\n";
4409
4410                         print "</tr>\n";
4411                         next; # instead of 'else' clause, to avoid extra indent
4412                 }
4413                 # else ordinary diff
4414
4415                 my ($to_mode_oct, $to_mode_str, $to_file_type);
4416                 my ($from_mode_oct, $from_mode_str, $from_file_type);
4417                 if ($diff->{'to_mode'} ne ('0' x 6)) {
4418                         $to_mode_oct = oct $diff->{'to_mode'};
4419                         if (S_ISREG($to_mode_oct)) { # only for regular file
4420                                 $to_mode_str = sprintf("%04o", $to_mode_oct & 0777); # permission bits
4421                         }
4422                         $to_file_type = file_type($diff->{'to_mode'});
4423                 }
4424                 if ($diff->{'from_mode'} ne ('0' x 6)) {
4425                         $from_mode_oct = oct $diff->{'from_mode'};
4426                         if (S_ISREG($from_mode_oct)) { # only for regular file
4427                                 $from_mode_str = sprintf("%04o", $from_mode_oct & 0777); # permission bits
4428                         }
4429                         $from_file_type = file_type($diff->{'from_mode'});
4430                 }
4431
4432                 if ($diff->{'status'} eq "A") { # created
4433                         my $mode_chng = "<span class=\"file_status new\">[new $to_file_type";
4434                         $mode_chng   .= " with mode: $to_mode_str" if $to_mode_str;
4435                         $mode_chng   .= "]</span>";
4436                         print "<td>";
4437                         print $cgi->a({-href => href(action=>"blob", hash=>$diff->{'to_id'},
4438                                                      hash_base=>$hash, file_name=>$diff->{'file'}),
4439                                       -class => "list"}, esc_path($diff->{'file'}));
4440                         print "</td>\n";
4441                         print "<td>$mode_chng</td>\n";
4442                         print "<td class=\"link\">";
4443                         if ($action eq 'commitdiff') {
4444                                 # link to patch
4445                                 $patchno++;
4446                                 print $cgi->a({-href => href(-anchor=>"patch$patchno")},
4447                                               "patch") .
4448                                       " | ";
4449                         }
4450                         print $cgi->a({-href => href(action=>"blob", hash=>$diff->{'to_id'},
4451                                                      hash_base=>$hash, file_name=>$diff->{'file'})},
4452                                       "blob");
4453                         print "</td>\n";
4454
4455                 } elsif ($diff->{'status'} eq "D") { # deleted
4456                         my $mode_chng = "<span class=\"file_status deleted\">[deleted $from_file_type]</span>";
4457                         print "<td>";
4458                         print $cgi->a({-href => href(action=>"blob", hash=>$diff->{'from_id'},
4459                                                      hash_base=>$parent, file_name=>$diff->{'file'}),
4460                                        -class => "list"}, esc_path($diff->{'file'}));
4461                         print "</td>\n";
4462                         print "<td>$mode_chng</td>\n";
4463                         print "<td class=\"link\">";
4464                         if ($action eq 'commitdiff') {
4465                                 # link to patch
4466                                 $patchno++;
4467                                 print $cgi->a({-href => href(-anchor=>"patch$patchno")},
4468                                               "patch") .
4469                                       " | ";
4470                         }
4471                         print $cgi->a({-href => href(action=>"blob", hash=>$diff->{'from_id'},
4472                                                      hash_base=>$parent, file_name=>$diff->{'file'})},
4473                                       "blob") . " | ";
4474                         if ($have_blame) {
4475                                 print $cgi->a({-href => href(action=>"blame", hash_base=>$parent,
4476                                                              file_name=>$diff->{'file'})},
4477                                               "blame") . " | ";
4478                         }
4479                         print $cgi->a({-href => href(action=>"history", hash_base=>$parent,
4480                                                      file_name=>$diff->{'file'})},
4481                                       "history");
4482                         print "</td>\n";
4483
4484                 } elsif ($diff->{'status'} eq "M" || $diff->{'status'} eq "T") { # modified, or type changed
4485                         my $mode_chnge = "";
4486                         if ($diff->{'from_mode'} != $diff->{'to_mode'}) {
4487                                 $mode_chnge = "<span class=\"file_status mode_chnge\">[changed";
4488                                 if ($from_file_type ne $to_file_type) {
4489                                         $mode_chnge .= " from $from_file_type to $to_file_type";
4490                                 }
4491                                 if (($from_mode_oct & 0777) != ($to_mode_oct & 0777)) {
4492                                         if ($from_mode_str && $to_mode_str) {
4493                                                 $mode_chnge .= " mode: $from_mode_str->$to_mode_str";
4494                                         } elsif ($to_mode_str) {
4495                                                 $mode_chnge .= " mode: $to_mode_str";
4496                                         }
4497                                 }
4498                                 $mode_chnge .= "]</span>\n";
4499                         }
4500                         print "<td>";
4501                         print $cgi->a({-href => href(action=>"blob", hash=>$diff->{'to_id'},
4502                                                      hash_base=>$hash, file_name=>$diff->{'file'}),
4503                                       -class => "list"}, esc_path($diff->{'file'}));
4504                         print "</td>\n";
4505                         print "<td>$mode_chnge</td>\n";
4506                         print "<td class=\"link\">";
4507                         if ($action eq 'commitdiff') {
4508                                 # link to patch
4509                                 $patchno++;
4510                                 print $cgi->a({-href => href(-anchor=>"patch$patchno")},
4511                                               "patch") .
4512                                       " | ";
4513                         } elsif ($diff->{'to_id'} ne $diff->{'from_id'}) {
4514                                 # "commit" view and modified file (not onlu mode changed)
4515                                 print $cgi->a({-href => href(action=>"blobdiff",
4516                                                              hash=>$diff->{'to_id'}, hash_parent=>$diff->{'from_id'},
4517                                                              hash_base=>$hash, hash_parent_base=>$parent,
4518                                                              file_name=>$diff->{'file'})},
4519                                               "diff") .
4520                                       " | ";
4521                         }
4522                         print $cgi->a({-href => href(action=>"blob", hash=>$diff->{'to_id'},
4523                                                      hash_base=>$hash, file_name=>$diff->{'file'})},
4524                                        "blob") . " | ";
4525                         if ($have_blame) {
4526                                 print $cgi->a({-href => href(action=>"blame", hash_base=>$hash,
4527                                                              file_name=>$diff->{'file'})},
4528                                               "blame") . " | ";
4529                         }
4530                         print $cgi->a({-href => href(action=>"history", hash_base=>$hash,
4531                                                      file_name=>$diff->{'file'})},
4532                                       "history");
4533                         print "</td>\n";
4534
4535                 } elsif ($diff->{'status'} eq "R" || $diff->{'status'} eq "C") { # renamed or copied
4536                         my %status_name = ('R' => 'moved', 'C' => 'copied');
4537                         my $nstatus = $status_name{$diff->{'status'}};
4538                         my $mode_chng = "";
4539                         if ($diff->{'from_mode'} != $diff->{'to_mode'}) {
4540                                 # mode also for directories, so we cannot use $to_mode_str
4541                                 $mode_chng = sprintf(", mode: %04o", $to_mode_oct & 0777);
4542                         }
4543                         print "<td>" .
4544                               $cgi->a({-href => href(action=>"blob", hash_base=>$hash,
4545                                                      hash=>$diff->{'to_id'}, file_name=>$diff->{'to_file'}),
4546                                       -class => "list"}, esc_path($diff->{'to_file'})) . "</td>\n" .
4547                               "<td><span class=\"file_status $nstatus\">[$nstatus from " .
4548                               $cgi->a({-href => href(action=>"blob", hash_base=>$parent,
4549                                                      hash=>$diff->{'from_id'}, file_name=>$diff->{'from_file'}),
4550                                       -class => "list"}, esc_path($diff->{'from_file'})) .
4551                               " with " . (int $diff->{'similarity'}) . "% similarity$mode_chng]</span></td>\n" .
4552                               "<td class=\"link\">";
4553                         if ($action eq 'commitdiff') {
4554                                 # link to patch
4555                                 $patchno++;
4556                                 print $cgi->a({-href => href(-anchor=>"patch$patchno")},
4557                                               "patch") .
4558                                       " | ";
4559                         } elsif ($diff->{'to_id'} ne $diff->{'from_id'}) {
4560                                 # "commit" view and modified file (not only pure rename or copy)
4561                                 print $cgi->a({-href => href(action=>"blobdiff",
4562                                                              hash=>$diff->{'to_id'}, hash_parent=>$diff->{'from_id'},
4563                                                              hash_base=>$hash, hash_parent_base=>$parent,
4564                                                              file_name=>$diff->{'to_file'}, file_parent=>$diff->{'from_file'})},
4565                                               "diff") .
4566                                       " | ";
4567                         }
4568                         print $cgi->a({-href => href(action=>"blob", hash=>$diff->{'to_id'},
4569                                                      hash_base=>$parent, file_name=>$diff->{'to_file'})},
4570                                       "blob") . " | ";
4571                         if ($have_blame) {
4572                                 print $cgi->a({-href => href(action=>"blame", hash_base=>$hash,
4573                                                              file_name=>$diff->{'to_file'})},
4574                                               "blame") . " | ";
4575                         }
4576                         print $cgi->a({-href => href(action=>"history", hash_base=>$hash,
4577                                                     file_name=>$diff->{'to_file'})},
4578                                       "history");
4579                         print "</td>\n";
4580
4581                 } # we should not encounter Unmerged (U) or Unknown (X) status
4582                 print "</tr>\n";
4583         }
4584         print "</tbody>" if $has_header;
4585         print "</table>\n";
4586 }
4587
4588 sub git_patchset_body {
4589         my ($fd, $difftree, $hash, @hash_parents) = @_;
4590         my ($hash_parent) = $hash_parents[0];
4591
4592         my $is_combined = (@hash_parents > 1);
4593         my $patch_idx = 0;
4594         my $patch_number = 0;
4595         my $patch_line;
4596         my $diffinfo;
4597         my $to_name;
4598         my (%from, %to);
4599
4600         print "<div class=\"patchset\">\n";
4601
4602         # skip to first patch
4603         while ($patch_line = <$fd>) {
4604                 chomp $patch_line;
4605
4606                 last if ($patch_line =~ m/^diff /);
4607         }
4608
4609  PATCH:
4610         while ($patch_line) {
4611
4612                 # parse "git diff" header line
4613                 if ($patch_line =~ m/^diff --git (\"(?:[^\\\"]*(?:\\.[^\\\"]*)*)\"|[^ "]*) (.*)$/) {
4614                         # $1 is from_name, which we do not use
4615                         $to_name = unquote($2);
4616                         $to_name =~ s!^b/!!;
4617                 } elsif ($patch_line =~ m/^diff --(cc|combined) ("?.*"?)$/) {
4618                         # $1 is 'cc' or 'combined', which we do not use
4619                         $to_name = unquote($2);
4620                 } else {
4621                         $to_name = undef;
4622                 }
4623
4624                 # check if current patch belong to current raw line
4625                 # and parse raw git-diff line if needed
4626                 if (is_patch_split($diffinfo, { 'to_file' => $to_name })) {
4627                         # this is continuation of a split patch
4628                         print "<div class=\"patch cont\">\n";
4629                 } else {
4630                         # advance raw git-diff output if needed
4631                         $patch_idx++ if defined $diffinfo;
4632
4633                         # read and prepare patch information
4634                         $diffinfo = parsed_difftree_line($difftree->[$patch_idx]);
4635
4636                         # compact combined diff output can have some patches skipped
4637                         # find which patch (using pathname of result) we are at now;
4638                         if ($is_combined) {
4639                                 while ($to_name ne $diffinfo->{'to_file'}) {
4640                                         print "<div class=\"patch\" id=\"patch". ($patch_idx+1) ."\">\n" .
4641                                               format_diff_cc_simplified($diffinfo, @hash_parents) .
4642                                               "</div>\n";  # class="patch"
4643
4644                                         $patch_idx++;
4645                                         $patch_number++;
4646
4647                                         last if $patch_idx > $#$difftree;
4648                                         $diffinfo = parsed_difftree_line($difftree->[$patch_idx]);
4649                                 }
4650                         }
4651
4652                         # modifies %from, %to hashes
4653                         parse_from_to_diffinfo($diffinfo, \%from, \%to, @hash_parents);
4654
4655                         # this is first patch for raw difftree line with $patch_idx index
4656                         # we index @$difftree array from 0, but number patches from 1
4657                         print "<div class=\"patch\" id=\"patch". ($patch_idx+1) ."\">\n";
4658                 }
4659
4660                 # git diff header
4661                 #assert($patch_line =~ m/^diff /) if DEBUG;
4662                 #assert($patch_line !~ m!$/$!) if DEBUG; # is chomp-ed
4663                 $patch_number++;
4664                 # print "git diff" header
4665                 print format_git_diff_header_line($patch_line, $diffinfo,
4666                                                   \%from, \%to);
4667
4668                 # print extended diff header
4669                 print "<div class=\"diff extended_header\">\n";
4670         EXTENDED_HEADER:
4671                 while ($patch_line = <$fd>) {
4672                         chomp $patch_line;
4673
4674                         last EXTENDED_HEADER if ($patch_line =~ m/^--- |^diff /);
4675
4676                         print format_extended_diff_header_line($patch_line, $diffinfo,
4677                                                                \%from, \%to);
4678                 }
4679                 print "</div>\n"; # class="diff extended_header"
4680
4681                 # from-file/to-file diff header
4682                 if (! $patch_line) {
4683                         print "</div>\n"; # class="patch"
4684                         last PATCH;
4685                 }
4686                 next PATCH if ($patch_line =~ m/^diff /);
4687                 #assert($patch_line =~ m/^---/) if DEBUG;
4688
4689                 my $last_patch_line = $patch_line;
4690                 $patch_line = <$fd>;
4691                 chomp $patch_line;
4692                 #assert($patch_line =~ m/^\+\+\+/) if DEBUG;
4693
4694                 print format_diff_from_to_header($last_patch_line, $patch_line,
4695                                                  $diffinfo, \%from, \%to,
4696                                                  @hash_parents);
4697
4698                 # the patch itself
4699         LINE:
4700                 while ($patch_line = <$fd>) {
4701                         chomp $patch_line;
4702
4703                         next PATCH if ($patch_line =~ m/^diff /);
4704
4705                         print format_diff_line($patch_line, \%from, \%to);
4706                 }
4707
4708         } continue {
4709                 print "</div>\n"; # class="patch"
4710         }
4711
4712         # for compact combined (--cc) format, with chunk and patch simplification
4713         # the patchset might be empty, but there might be unprocessed raw lines
4714         for (++$patch_idx if $patch_number > 0;
4715              $patch_idx < @$difftree;
4716              ++$patch_idx) {
4717                 # read and prepare patch information
4718                 $diffinfo = parsed_difftree_line($difftree->[$patch_idx]);
4719
4720                 # generate anchor for "patch" links in difftree / whatchanged part
4721                 print "<div class=\"patch\" id=\"patch". ($patch_idx+1) ."\">\n" .
4722                       format_diff_cc_simplified($diffinfo, @hash_parents) .
4723                       "</div>\n";  # class="patch"
4724
4725                 $patch_number++;
4726         }
4727
4728         if ($patch_number == 0) {
4729                 if (@hash_parents > 1) {
4730                         print "<div class=\"diff nodifferences\">Trivial merge</div>\n";
4731                 } else {
4732                         print "<div class=\"diff nodifferences\">No differences found</div>\n";
4733                 }
4734         }
4735
4736         print "</div>\n"; # class="patchset"
4737 }
4738
4739 # . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
4740
4741 # fills project list info (age, description, owner, forks) for each
4742 # project in the list, removing invalid projects from returned list
4743 # NOTE: modifies $projlist, but does not remove entries from it
4744 sub fill_project_list_info {
4745         my ($projlist, $check_forks) = @_;
4746         my @projects;
4747
4748         my $show_ctags = gitweb_check_feature('ctags');
4749  PROJECT:
4750         foreach my $pr (@$projlist) {
4751                 my (@activity) = git_get_last_activity($pr->{'path'});
4752                 unless (@activity) {
4753                         next PROJECT;
4754                 }
4755                 ($pr->{'age'}, $pr->{'age_string'}) = @activity;
4756                 if (!defined $pr->{'descr'}) {
4757                         my $descr = git_get_project_description($pr->{'path'}) || "";
4758                         $descr = to_utf8($descr);
4759                         $pr->{'descr_long'} = $descr;
4760                         $pr->{'descr'} = chop_str($descr, $projects_list_description_width, 5);
4761                 }
4762                 if (!defined $pr->{'owner'}) {
4763                         $pr->{'owner'} = git_get_project_owner("$pr->{'path'}") || "";
4764                 }
4765                 if ($check_forks) {
4766                         my $pname = $pr->{'path'};
4767                         if (($pname =~ s/\.git$//) &&
4768                             ($pname !~ /\/$/) &&
4769                             (-d "$projectroot/$pname")) {
4770                                 $pr->{'forks'} = "-d $projectroot/$pname";
4771                         } else {
4772                                 $pr->{'forks'} = 0;
4773                         }
4774                 }
4775                 $show_ctags and $pr->{'ctags'} = git_get_project_ctags($pr->{'path'});
4776                 push @projects, $pr;
4777         }
4778
4779         return @projects;
4780 }
4781
4782 # print 'sort by' <th> element, generating 'sort by $name' replay link
4783 # if that order is not selected
4784 sub print_sort_th {
4785         print format_sort_th(@_);
4786 }
4787
4788 sub format_sort_th {
4789         my ($name, $order, $header) = @_;
4790         my $sort_th = "";
4791         $header ||= ucfirst($name);
4792
4793         if ($order eq $name) {
4794                 $sort_th .= "<th>$header</th>\n";
4795         } else {
4796                 $sort_th .= "<th>" .
4797                             $cgi->a({-href => href(-replay=>1, order=>$name),
4798                                      -class => "header"}, $header) .
4799                             "</th>\n";
4800         }
4801
4802         return $sort_th;
4803 }
4804
4805 sub git_project_list_body {
4806         # actually uses global variable $project
4807         my ($projlist, $order, $from, $to, $extra, $no_header) = @_;
4808
4809         my $check_forks = gitweb_check_feature('forks');
4810         my @projects = fill_project_list_info($projlist, $check_forks);
4811
4812         $order ||= $default_projects_order;
4813         $from = 0 unless defined $from;
4814         $to = $#projects if (!defined $to || $#projects < $to);
4815
4816         my %order_info = (
4817                 project => { key => 'path', type => 'str' },
4818                 descr => { key => 'descr_long', type => 'str' },
4819                 owner => { key => 'owner', type => 'str' },
4820                 age => { key => 'age', type => 'num' }
4821         );
4822         my $oi = $order_info{$order};
4823         if ($oi->{'type'} eq 'str') {
4824                 @projects = sort {$a->{$oi->{'key'}} cmp $b->{$oi->{'key'}}} @projects;
4825         } else {
4826                 @projects = sort {$a->{$oi->{'key'}} <=> $b->{$oi->{'key'}}} @projects;
4827         }
4828
4829         my $show_ctags = gitweb_check_feature('ctags');
4830         if ($show_ctags) {
4831                 my %ctags;
4832                 foreach my $p (@projects) {
4833                         foreach my $ct (keys %{$p->{'ctags'}}) {
4834                                 $ctags{$ct} += $p->{'ctags'}->{$ct};
4835                         }
4836                 }
4837                 my $cloud = git_populate_project_tagcloud(\%ctags);
4838                 print git_show_project_tagcloud($cloud, 64);
4839         }
4840
4841         print "<table class=\"project_list\">\n";
4842         unless ($no_header) {
4843                 print "<tr>\n";
4844                 if ($check_forks) {
4845                         print "<th></th>\n";
4846                 }
4847                 print_sort_th('project', $order, 'Project');
4848                 print_sort_th('descr', $order, 'Description');
4849                 print_sort_th('owner', $order, 'Owner');
4850                 print_sort_th('age', $order, 'Last Change');
4851                 print "<th></th>\n" . # for links
4852                       "</tr>\n";
4853         }
4854         my $alternate = 1;
4855         my $tagfilter = $cgi->param('by_tag');
4856         for (my $i = $from; $i <= $to; $i++) {
4857                 my $pr = $projects[$i];
4858
4859                 next if $tagfilter and $show_ctags and not grep { lc $_ eq lc $tagfilter } keys %{$pr->{'ctags'}};
4860                 next if $searchtext and not $pr->{'path'} =~ /$searchtext/
4861                         and not $pr->{'descr_long'} =~ /$searchtext/;
4862                 # Weed out forks or non-matching entries of search
4863                 if ($check_forks) {
4864                         my $forkbase = $project; $forkbase ||= ''; $forkbase =~ s#\.git$#/#;
4865                         $forkbase="^$forkbase" if $forkbase;
4866                         next if not $searchtext and not $tagfilter and $show_ctags
4867                                 and $pr->{'path'} =~ m#$forkbase.*/.*#; # regexp-safe
4868                 }
4869
4870                 if ($alternate) {
4871                         print "<tr class=\"dark\">\n";
4872                 } else {
4873                         print "<tr class=\"light\">\n";
4874                 }
4875                 $alternate ^= 1;
4876                 if ($check_forks) {
4877                         print "<td>";
4878                         if ($pr->{'forks'}) {
4879                                 print "<!-- $pr->{'forks'} -->\n";
4880                                 print $cgi->a({-href => href(project=>$pr->{'path'}, action=>"forks")}, "+");
4881                         }
4882                         print "</td>\n";
4883                 }
4884                 print "<td>" . $cgi->a({-href => href(project=>$pr->{'path'}, action=>"summary"),
4885                                         -class => "list"}, esc_html($pr->{'path'})) . "</td>\n" .
4886                       "<td>" . $cgi->a({-href => href(project=>$pr->{'path'}, action=>"summary"),
4887                                         -class => "list", -title => $pr->{'descr_long'}},
4888                                         esc_html($pr->{'descr'})) . "</td>\n" .
4889                       "<td><i>" . chop_and_escape_str($pr->{'owner'}, 15) . "</i></td>\n";
4890                 print "<td class=\"". age_class($pr->{'age'}) . "\">" .
4891                       (defined $pr->{'age_string'} ? $pr->{'age_string'} : "No commits") . "</td>\n" .
4892                       "<td class=\"link\">" .
4893                       $cgi->a({-href => href(project=>$pr->{'path'}, action=>"summary")}, "summary")   . " | " .
4894                       $cgi->a({-href => href(project=>$pr->{'path'}, action=>"shortlog")}, "shortlog") . " | " .
4895                       $cgi->a({-href => href(project=>$pr->{'path'}, action=>"log")}, "log") . " | " .
4896                       $cgi->a({-href => href(project=>$pr->{'path'}, action=>"tree")}, "tree") .
4897                       ($pr->{'forks'} ? " | " . $cgi->a({-href => href(project=>$pr->{'path'}, action=>"forks")}, "forks") : '') .
4898                       "</td>\n" .
4899                       "</tr>\n";
4900         }
4901         if (defined $extra) {
4902                 print "<tr>\n";
4903                 if ($check_forks) {
4904                         print "<td></td>\n";
4905                 }
4906                 print "<td colspan=\"5\">$extra</td>\n" .
4907                       "</tr>\n";
4908         }
4909         print "</table>\n";
4910 }
4911
4912 sub git_log_body {
4913         # uses global variable $project
4914         my ($commitlist, $from, $to, $refs, $extra) = @_;
4915
4916         $from = 0 unless defined $from;
4917         $to = $#{$commitlist} if (!defined $to || $#{$commitlist} < $to);
4918
4919         for (my $i = 0; $i <= $to; $i++) {
4920                 my %co = %{$commitlist->[$i]};
4921                 next if !%co;
4922                 my $commit = $co{'id'};
4923                 my $ref = format_ref_marker($refs, $commit);
4924                 git_print_header_div('commit',
4925                                "<span class=\"age\">$co{'age_string'}</span>" .
4926                                esc_html($co{'title'}) . $ref,
4927                                $commit);
4928                 print "<div class=\"title_text\">\n" .
4929                       "<div class=\"log_link\">\n" .
4930                       $cgi->a({-href => href(action=>"commit", hash=>$commit)}, "commit") .
4931                       " | " .
4932                       $cgi->a({-href => href(action=>"commitdiff", hash=>$commit)}, "commitdiff") .
4933                       " | " .
4934                       $cgi->a({-href => href(action=>"tree", hash=>$commit, hash_base=>$commit)}, "tree") .
4935                       "<br/>\n" .
4936                       "</div>\n";
4937                       git_print_authorship(\%co, -tag => 'span');
4938                       print "<br/>\n</div>\n";
4939
4940                 print "<div class=\"log_body\">\n";
4941                 git_print_log($co{'comment'}, -final_empty_line=> 1);
4942                 print "</div>\n";
4943         }
4944         if ($extra) {
4945                 print "<div class=\"page_nav\">\n";
4946                 print "$extra\n";
4947                 print "</div>\n";
4948         }
4949 }
4950
4951 sub git_shortlog_body {
4952         # uses global variable $project
4953         my ($commitlist, $from, $to, $refs, $extra) = @_;
4954
4955         $from = 0 unless defined $from;
4956         $to = $#{$commitlist} if (!defined $to || $#{$commitlist} < $to);
4957
4958         print "<table class=\"shortlog\">\n";
4959         my $alternate = 1;
4960         for (my $i = $from; $i <= $to; $i++) {
4961                 my %co = %{$commitlist->[$i]};
4962                 my $commit = $co{'id'};
4963                 my $ref = format_ref_marker($refs, $commit);
4964                 if ($alternate) {
4965                         print "<tr class=\"dark\">\n";
4966                 } else {
4967                         print "<tr class=\"light\">\n";
4968                 }
4969                 $alternate ^= 1;
4970                 # git_summary() used print "<td><i>$co{'age_string'}</i></td>\n" .
4971                 print "<td title=\"$co{'age_string_age'}\"><i>$co{'age_string_date'}</i></td>\n" .
4972                       format_author_html('td', \%co, 10) . "<td>";
4973                 print format_subject_html($co{'title'}, $co{'title_short'},
4974                                           href(action=>"commit", hash=>$commit), $ref);
4975                 print "</td>\n" .
4976                       "<td class=\"link\">" .
4977                       $cgi->a({-href => href(action=>"commit", hash=>$commit)}, "commit") . " | " .
4978                       $cgi->a({-href => href(action=>"commitdiff", hash=>$commit)}, "commitdiff") . " | " .
4979                       $cgi->a({-href => href(action=>"tree", hash=>$commit, hash_base=>$commit)}, "tree");
4980                 my $snapshot_links = format_snapshot_links($commit);
4981                 if (defined $snapshot_links) {
4982                         print " | " . $snapshot_links;
4983                 }
4984                 print "</td>\n" .
4985                       "</tr>\n";
4986         }
4987         if (defined $extra) {
4988                 print "<tr>\n" .
4989                       "<td colspan=\"4\">$extra</td>\n" .
4990                       "</tr>\n";
4991         }
4992         print "</table>\n";
4993 }
4994
4995 sub git_history_body {
4996         # Warning: assumes constant type (blob or tree) during history
4997         my ($commitlist, $from, $to, $refs, $extra,
4998             $file_name, $file_hash, $ftype) = @_;
4999
5000         $from = 0 unless defined $from;
5001         $to = $#{$commitlist} unless (defined $to && $to <= $#{$commitlist});
5002
5003         print "<table class=\"history\">\n";
5004         my $alternate = 1;
5005         for (my $i = $from; $i <= $to; $i++) {
5006                 my %co = %{$commitlist->[$i]};
5007                 if (!%co) {
5008                         next;
5009                 }
5010                 my $commit = $co{'id'};
5011
5012                 my $ref = format_ref_marker($refs, $commit);
5013
5014                 if ($alternate) {
5015                         print "<tr class=\"dark\">\n";
5016                 } else {
5017                         print "<tr class=\"light\">\n";
5018                 }
5019                 $alternate ^= 1;
5020                 print "<td title=\"$co{'age_string_age'}\"><i>$co{'age_string_date'}</i></td>\n" .
5021         # shortlog:   format_author_html('td', \%co, 10)
5022                       format_author_html('td', \%co, 15, 3) . "<td>";
5023                 # originally git_history used chop_str($co{'title'}, 50)
5024                 print format_subject_html($co{'title'}, $co{'title_short'},
5025                                           href(action=>"commit", hash=>$commit), $ref);
5026                 print "</td>\n" .
5027                       "<td class=\"link\">" .
5028                       $cgi->a({-href => href(action=>$ftype, hash_base=>$commit, file_name=>$file_name)}, $ftype) . " | " .
5029                       $cgi->a({-href => href(action=>"commitdiff", hash=>$commit)}, "commitdiff");
5030
5031                 if ($ftype eq 'blob') {
5032                         my $blob_current = $file_hash;
5033                         my $blob_parent  = git_get_hash_by_path($commit, $file_name);
5034                         if (defined $blob_current && defined $blob_parent &&
5035                                         $blob_current ne $blob_parent) {
5036                                 print " | " .
5037                                         $cgi->a({-href => href(action=>"blobdiff",
5038                                                                hash=>$blob_current, hash_parent=>$blob_parent,
5039                                                                hash_base=>$hash_base, hash_parent_base=>$commit,
5040                                                                file_name=>$file_name)},
5041                                                 "diff to current");
5042                         }
5043                 }
5044                 print "</td>\n" .
5045                       "</tr>\n";
5046         }
5047         if (defined $extra) {
5048                 print "<tr>\n" .
5049                       "<td colspan=\"4\">$extra</td>\n" .
5050                       "</tr>\n";
5051         }
5052         print "</table>\n";
5053 }
5054
5055 sub git_tags_body {
5056         # uses global variable $project
5057         my ($taglist, $from, $to, $extra) = @_;
5058         $from = 0 unless defined $from;
5059         $to = $#{$taglist} if (!defined $to || $#{$taglist} < $to);
5060
5061         print "<table class=\"tags\">\n";
5062         my $alternate = 1;
5063         for (my $i = $from; $i <= $to; $i++) {
5064                 my $entry = $taglist->[$i];
5065                 my %tag = %$entry;
5066                 my $comment = $tag{'subject'};
5067                 my $comment_short;
5068                 if (defined $comment) {
5069                         $comment_short = chop_str($comment, 30, 5);
5070                 }
5071                 if ($alternate) {
5072                         print "<tr class=\"dark\">\n";
5073                 } else {
5074                         print "<tr class=\"light\">\n";
5075                 }
5076                 $alternate ^= 1;
5077                 if (defined $tag{'age'}) {
5078                         print "<td><i>$tag{'age'}</i></td>\n";
5079                 } else {
5080                         print "<td></td>\n";
5081                 }
5082                 print "<td>" .
5083                       $cgi->a({-href => href(action=>$tag{'reftype'}, hash=>$tag{'refid'}),
5084                                -class => "list name"}, esc_html($tag{'name'})) .
5085                       "</td>\n" .
5086                       "<td>";
5087                 if (defined $comment) {
5088                         print format_subject_html($comment, $comment_short,
5089                                                   href(action=>"tag", hash=>$tag{'id'}));
5090                 }
5091                 print "</td>\n" .
5092                       "<td class=\"selflink\">";
5093                 if ($tag{'type'} eq "tag") {
5094                         print $cgi->a({-href => href(action=>"tag", hash=>$tag{'id'})}, "tag");
5095                 } else {
5096                         print "&nbsp;";
5097                 }
5098                 print "</td>\n" .
5099                       "<td class=\"link\">" . " | " .
5100                       $cgi->a({-href => href(action=>$tag{'reftype'}, hash=>$tag{'refid'})}, $tag{'reftype'});
5101                 if ($tag{'reftype'} eq "commit") {
5102                         print " | " . $cgi->a({-href => href(action=>"shortlog", hash=>$tag{'fullname'})}, "shortlog") .
5103                               " | " . $cgi->a({-href => href(action=>"log", hash=>$tag{'fullname'})}, "log");
5104                 } elsif ($tag{'reftype'} eq "blob") {
5105                         print " | " . $cgi->a({-href => href(action=>"blob_plain", hash=>$tag{'refid'})}, "raw");
5106                 }
5107                 print "</td>\n" .
5108                       "</tr>";
5109         }
5110         if (defined $extra) {
5111                 print "<tr>\n" .
5112                       "<td colspan=\"5\">$extra</td>\n" .
5113                       "</tr>\n";
5114         }
5115         print "</table>\n";
5116 }
5117
5118 sub git_heads_body {
5119         # uses global variable $project
5120         my ($headlist, $head, $from, $to, $extra) = @_;
5121         $from = 0 unless defined $from;
5122         $to = $#{$headlist} if (!defined $to || $#{$headlist} < $to);
5123
5124         print "<table class=\"heads\">\n";
5125         my $alternate = 1;
5126         for (my $i = $from; $i <= $to; $i++) {
5127                 my $entry = $headlist->[$i];
5128                 my %ref = %$entry;
5129                 my $curr = $ref{'id'} eq $head;
5130                 if ($alternate) {
5131                         print "<tr class=\"dark\">\n";
5132                 } else {
5133                         print "<tr class=\"light\">\n";
5134                 }
5135                 $alternate ^= 1;
5136                 print "<td><i>$ref{'age'}</i></td>\n" .
5137                       ($curr ? "<td class=\"current_head\">" : "<td>") .
5138                       $cgi->a({-href => href(action=>"shortlog", hash=>$ref{'fullname'}),
5139                                -class => "list name"},esc_html($ref{'name'})) .
5140                       "</td>\n" .
5141                       "<td class=\"link\">" .
5142                       $cgi->a({-href => href(action=>"shortlog", hash=>$ref{'fullname'})}, "shortlog") . " | " .
5143                       $cgi->a({-href => href(action=>"log", hash=>$ref{'fullname'})}, "log") . " | " .
5144                       $cgi->a({-href => href(action=>"tree", hash=>$ref{'fullname'}, hash_base=>$ref{'fullname'})}, "tree") .
5145                       "</td>\n" .
5146                       "</tr>";
5147         }
5148         if (defined $extra) {
5149                 print "<tr>\n" .
5150                       "<td colspan=\"3\">$extra</td>\n" .
5151                       "</tr>\n";
5152         }
5153         print "</table>\n";
5154 }
5155
5156 # Display a single remote block
5157 sub git_remote_block {
5158         my ($remote, $rdata, $limit, $head) = @_;
5159
5160         my $heads = $rdata->{'heads'};
5161         my $fetch = $rdata->{'fetch'};
5162         my $push = $rdata->{'push'};
5163
5164         my $urls_table = "<table class=\"projects_list\">\n" ;
5165
5166         if (defined $fetch) {
5167                 if ($fetch eq $push) {
5168                         $urls_table .= format_repo_url("URL", $fetch);
5169                 } else {
5170                         $urls_table .= format_repo_url("Fetch URL", $fetch);
5171                         $urls_table .= format_repo_url("Push URL", $push) if defined $push;
5172                 }
5173         } elsif (defined $push) {
5174                 $urls_table .= format_repo_url("Push URL", $push);
5175         } else {
5176                 $urls_table .= format_repo_url("", "No remote URL");
5177         }
5178
5179         $urls_table .= "</table>\n";
5180
5181         my $dots;
5182         if (defined $limit && $limit < @$heads) {
5183                 $dots = $cgi->a({-href => href(action=>"remotes", hash=>$remote)}, "...");
5184         }
5185
5186         print $urls_table;
5187         git_heads_body($heads, $head, 0, $limit, $dots);
5188 }
5189
5190 # Display a list of remote names with the respective fetch and push URLs
5191 sub git_remotes_list {
5192         my ($remotedata, $limit) = @_;
5193         print "<table class=\"heads\">\n";
5194         my $alternate = 1;
5195         my @remotes = sort keys %$remotedata;
5196
5197         my $limited = $limit && $limit < @remotes;
5198
5199         $#remotes = $limit - 1 if $limited;
5200
5201         while (my $remote = shift @remotes) {
5202                 my $rdata = $remotedata->{$remote};
5203                 my $fetch = $rdata->{'fetch'};
5204                 my $push = $rdata->{'push'};
5205                 if ($alternate) {
5206                         print "<tr class=\"dark\">\n";
5207                 } else {
5208                         print "<tr class=\"light\">\n";
5209                 }
5210                 $alternate ^= 1;
5211                 print "<td>" .
5212                       $cgi->a({-href=> href(action=>'remotes', hash=>$remote),
5213                                -class=> "list name"},esc_html($remote)) .
5214                       "</td>";
5215                 print "<td class=\"link\">" .
5216                       (defined $fetch ? $cgi->a({-href=> $fetch}, "fetch") : "fetch") .
5217                       " | " .
5218                       (defined $push ? $cgi->a({-href=> $push}, "push") : "push") .
5219                       "</td>";
5220
5221                 print "</tr>\n";
5222         }
5223
5224         if ($limited) {
5225                 print "<tr>\n" .
5226                       "<td colspan=\"3\">" .
5227                       $cgi->a({-href => href(action=>"remotes")}, "...") .
5228                       "</td>\n" . "</tr>\n";
5229         }
5230
5231         print "</table>";
5232 }
5233
5234 # Display remote heads grouped by remote, unless there are too many
5235 # remotes, in which case we only display the remote names
5236 sub git_remotes_body {
5237         my ($remotedata, $limit, $head) = @_;
5238         if ($limit and $limit < keys %$remotedata) {
5239                 git_remotes_list($remotedata, $limit);
5240         } else {
5241                 fill_remote_heads($remotedata);
5242                 while (my ($remote, $rdata) = each %$remotedata) {
5243                         git_print_section({-class=>"remote", -id=>$remote},
5244                                 ["remotes", $remote, $remote], sub {
5245                                         git_remote_block($remote, $rdata, $limit, $head);
5246                                 });
5247                 }
5248         }
5249 }
5250
5251 sub git_search_grep_body {
5252         my ($commitlist, $from, $to, $extra) = @_;
5253         $from = 0 unless defined $from;
5254         $to = $#{$commitlist} if (!defined $to || $#{$commitlist} < $to);
5255
5256         print "<table class=\"commit_search\">\n";
5257         my $alternate = 1;
5258         for (my $i = $from; $i <= $to; $i++) {
5259                 my %co = %{$commitlist->[$i]};
5260                 if (!%co) {
5261                         next;
5262                 }
5263                 my $commit = $co{'id'};
5264                 if ($alternate) {
5265                         print "<tr class=\"dark\">\n";
5266                 } else {
5267                         print "<tr class=\"light\">\n";
5268                 }
5269                 $alternate ^= 1;
5270                 print "<td title=\"$co{'age_string_age'}\"><i>$co{'age_string_date'}</i></td>\n" .
5271                       format_author_html('td', \%co, 15, 5) .
5272                       "<td>" .
5273                       $cgi->a({-href => href(action=>"commit", hash=>$co{'id'}),
5274                                -class => "list subject"},
5275                               chop_and_escape_str($co{'title'}, 50) . "<br/>");
5276                 my $comment = $co{'comment'};
5277                 foreach my $line (@$comment) {
5278                         if ($line =~ m/^(.*?)($search_regexp)(.*)$/i) {
5279                                 my ($lead, $match, $trail) = ($1, $2, $3);
5280                                 $match = chop_str($match, 70, 5, 'center');
5281                                 my $contextlen = int((80 - length($match))/2);
5282                                 $contextlen = 30 if ($contextlen > 30);
5283                                 $lead  = chop_str($lead,  $contextlen, 10, 'left');
5284                                 $trail = chop_str($trail, $contextlen, 10, 'right');
5285
5286                                 $lead  = esc_html($lead);
5287                                 $match = esc_html($match);
5288                                 $trail = esc_html($trail);
5289
5290                                 print "$lead<span class=\"match\">$match</span>$trail<br />";
5291                         }
5292                 }
5293                 print "</td>\n" .
5294                       "<td class=\"link\">" .
5295                       $cgi->a({-href => href(action=>"commit", hash=>$co{'id'})}, "commit") .
5296                       " | " .
5297                       $cgi->a({-href => href(action=>"commitdiff", hash=>$co{'id'})}, "commitdiff") .
5298                       " | " .
5299                       $cgi->a({-href => href(action=>"tree", hash=>$co{'tree'}, hash_base=>$co{'id'})}, "tree");
5300                 print "</td>\n" .
5301                       "</tr>\n";
5302         }
5303         if (defined $extra) {
5304                 print "<tr>\n" .
5305                       "<td colspan=\"3\">$extra</td>\n" .
5306                       "</tr>\n";
5307         }
5308         print "</table>\n";
5309 }
5310
5311 ## ======================================================================
5312 ## ======================================================================
5313 ## actions
5314
5315 sub git_project_list {
5316         my $order = $input_params{'order'};
5317         if (defined $order && $order !~ m/none|project|descr|owner|age/) {
5318                 die_error(400, "Unknown order parameter");
5319         }
5320
5321         my @list = git_get_projects_list();
5322         if (!@list) {
5323                 die_error(404, "No projects found");
5324         }
5325
5326         git_header_html();
5327         if (defined $home_text && -f $home_text) {
5328                 print "<div class=\"index_include\">\n";
5329                 insert_file($home_text);
5330                 print "</div>\n";
5331         }
5332         print $cgi->startform(-method => "get") .
5333               "<p class=\"projsearch\">Search:\n" .
5334               $cgi->textfield(-name => "s", -value => $searchtext) . "\n" .
5335               "</p>" .
5336               $cgi->end_form() . "\n";
5337         git_project_list_body(\@list, $order);
5338         git_footer_html();
5339 }
5340
5341 sub git_forks {
5342         my $order = $input_params{'order'};
5343         if (defined $order && $order !~ m/none|project|descr|owner|age/) {
5344                 die_error(400, "Unknown order parameter");
5345         }
5346
5347         my @list = git_get_projects_list($project);
5348         if (!@list) {
5349                 die_error(404, "No forks found");
5350         }
5351
5352         git_header_html();
5353         git_print_page_nav('','');
5354         git_print_header_div('summary', "$project forks");
5355         git_project_list_body(\@list, $order);
5356         git_footer_html();
5357 }
5358
5359 sub git_project_index {
5360         my @projects = git_get_projects_list($project);
5361
5362         print $cgi->header(
5363                 -type => 'text/plain',
5364                 -charset => 'utf-8',
5365                 -content_disposition => 'inline; filename="index.aux"');
5366
5367         foreach my $pr (@projects) {
5368                 if (!exists $pr->{'owner'}) {
5369                         $pr->{'owner'} = git_get_project_owner("$pr->{'path'}");
5370                 }
5371
5372                 my ($path, $owner) = ($pr->{'path'}, $pr->{'owner'});
5373                 # quote as in CGI::Util::encode, but keep the slash, and use '+' for ' '
5374                 $path  =~ s/([^a-zA-Z0-9_.\-\/ ])/sprintf("%%%02X", ord($1))/eg;
5375                 $owner =~ s/([^a-zA-Z0-9_.\-\/ ])/sprintf("%%%02X", ord($1))/eg;
5376                 $path  =~ s/ /\+/g;
5377                 $owner =~ s/ /\+/g;
5378
5379                 print "$path $owner\n";
5380         }
5381 }
5382
5383 sub git_summary {
5384         my $descr = git_get_project_description($project) || "none";
5385         my %co = parse_commit("HEAD");
5386         my %cd = %co ? parse_date($co{'committer_epoch'}, $co{'committer_tz'}) : ();
5387         my $head = $co{'id'};
5388         my $remote_heads = gitweb_check_feature('remote_heads');
5389
5390         my $owner = git_get_project_owner($project);
5391
5392         my $refs = git_get_references();
5393         # These get_*_list functions return one more to allow us to see if
5394         # there are more ...
5395         my @taglist  = git_get_tags_list(16);
5396         my @headlist = git_get_heads_list(16);
5397         my %remotedata = $remote_heads ? git_get_remotes_list() : ();
5398         my @forklist;
5399         my $check_forks = gitweb_check_feature('forks');
5400
5401         if ($check_forks) {
5402                 @forklist = git_get_projects_list($project);
5403         }
5404
5405         git_header_html();
5406         git_print_page_nav('summary','', $head);
5407
5408         print "<div class=\"title\">&nbsp;</div>\n";
5409         print "<table class=\"projects_list\">\n" .
5410               "<tr id=\"metadata_desc\"><td>description</td><td>" . esc_html($descr) . "</td></tr>\n" .
5411               "<tr id=\"metadata_owner\"><td>owner</td><td>" . esc_html($owner) . "</td></tr>\n";
5412         if (defined $cd{'rfc2822'}) {
5413                 print "<tr id=\"metadata_lchange\"><td>last change</td><td>$cd{'rfc2822'}</td></tr>\n";
5414         }
5415
5416         # use per project git URL list in $projectroot/$project/cloneurl
5417         # or make project git URL from git base URL and project name
5418         my $url_tag = "URL";
5419         my @url_list = git_get_project_url_list($project);
5420         @url_list = map { "$_/$project" } @git_base_url_list unless @url_list;
5421         foreach my $git_url (@url_list) {
5422                 next unless $git_url;
5423                 print format_repo_url($url_tag, $git_url);
5424                 $url_tag = "";
5425         }
5426
5427         # Tag cloud
5428         my $show_ctags = gitweb_check_feature('ctags');
5429         if ($show_ctags) {
5430                 my $ctags = git_get_project_ctags($project);
5431                 my $cloud = git_populate_project_tagcloud($ctags);
5432                 print "<tr id=\"metadata_ctags\"><td>Content tags:<br />";
5433                 print "</td>\n<td>" unless %$ctags;
5434                 print "<form action=\"$show_ctags\" method=\"post\"><input type=\"hidden\" name=\"p\" value=\"$project\" />Add: <input type=\"text\" name=\"t\" size=\"8\" /></form>";
5435                 print "</td>\n<td>" if %$ctags;
5436                 print git_show_project_tagcloud($cloud, 48);
5437                 print "</td></tr>";
5438         }
5439
5440         print "</table>\n";
5441
5442         # If XSS prevention is on, we don't include README.html.
5443         # TODO: Allow a readme in some safe format.
5444         if (!$prevent_xss && -s "$projectroot/$project/README.html") {
5445                 print "<div class=\"title\">readme</div>\n" .
5446                       "<div class=\"readme\">\n";
5447                 insert_file("$projectroot/$project/README.html");
5448                 print "\n</div>\n"; # class="readme"
5449         }
5450
5451         # we need to request one more than 16 (0..15) to check if
5452         # those 16 are all
5453         my @commitlist = $head ? parse_commits($head, 17) : ();
5454         if (@commitlist) {
5455                 git_print_header_div('shortlog');
5456                 git_shortlog_body(\@commitlist, 0, 15, $refs,
5457                                   $#commitlist <=  15 ? undef :
5458                                   $cgi->a({-href => href(action=>"shortlog")}, "..."));
5459         }
5460
5461         if (@taglist) {
5462                 git_print_header_div('tags');
5463                 git_tags_body(\@taglist, 0, 15,
5464                               $#taglist <=  15 ? undef :
5465                               $cgi->a({-href => href(action=>"tags")}, "..."));
5466         }
5467
5468         if (@headlist) {
5469                 git_print_header_div('heads');
5470                 git_heads_body(\@headlist, $head, 0, 15,
5471                                $#headlist <= 15 ? undef :
5472                                $cgi->a({-href => href(action=>"heads")}, "..."));
5473         }
5474
5475         if (%remotedata) {
5476                 git_print_header_div('remotes');
5477                 git_remotes_body(\%remotedata, 15, $head);
5478         }
5479
5480         if (@forklist) {
5481                 git_print_header_div('forks');
5482                 git_project_list_body(\@forklist, 'age', 0, 15,
5483                                       $#forklist <= 15 ? undef :
5484                                       $cgi->a({-href => href(action=>"forks")}, "..."),
5485                                       'no_header');
5486         }
5487
5488         git_footer_html();
5489 }
5490
5491 sub git_tag {
5492         my %tag = parse_tag($hash);
5493
5494         if (! %tag) {
5495                 die_error(404, "Unknown tag object");
5496         }
5497
5498         my $head = git_get_head_hash($project);
5499         git_header_html();
5500         git_print_page_nav('','', $head,undef,$head);
5501         git_print_header_div('commit', esc_html($tag{'name'}), $hash);
5502         print "<div class=\"title_text\">\n" .
5503               "<table class=\"object_header\">\n" .
5504               "<tr>\n" .
5505               "<td>object</td>\n" .
5506               "<td>" . $cgi->a({-class => "list", -href => href(action=>$tag{'type'}, hash=>$tag{'object'})},
5507                                $tag{'object'}) . "</td>\n" .
5508               "<td class=\"link\">" . $cgi->a({-href => href(action=>$tag{'type'}, hash=>$tag{'object'})},
5509                                               $tag{'type'}) . "</td>\n" .
5510               "</tr>\n";
5511         if (defined($tag{'author'})) {
5512                 git_print_authorship_rows(\%tag, 'author');
5513         }
5514         print "</table>\n\n" .
5515               "</div>\n";
5516         print "<div class=\"page_body\">";
5517         my $comment = $tag{'comment'};
5518         foreach my $line (@$comment) {
5519                 chomp $line;
5520                 print esc_html($line, -nbsp=>1) . "<br/>\n";
5521         }
5522         print "</div>\n";
5523         git_footer_html();
5524 }
5525
5526 sub git_blame_common {
5527         my $format = shift || 'porcelain';
5528         if ($format eq 'porcelain' && $cgi->param('js')) {
5529                 $format = 'incremental';
5530                 $action = 'blame_incremental'; # for page title etc
5531         }
5532
5533         # permissions
5534         gitweb_check_feature('blame')
5535                 or die_error(403, "Blame view not allowed");
5536
5537         # error checking
5538         die_error(400, "No file name given") unless $file_name;
5539         $hash_base ||= git_get_head_hash($project);
5540         die_error(404, "Couldn't find base commit") unless $hash_base;
5541         my %co = parse_commit($hash_base)
5542                 or die_error(404, "Commit not found");
5543         my $ftype = "blob";
5544         if (!defined $hash) {
5545                 $hash = git_get_hash_by_path($hash_base, $file_name, "blob")
5546                         or die_error(404, "Error looking up file");
5547         } else {
5548                 $ftype = git_get_type($hash);
5549                 if ($ftype !~ "blob") {
5550                         die_error(400, "Object is not a blob");
5551                 }
5552         }
5553
5554         my $fd;
5555         if ($format eq 'incremental') {
5556                 # get file contents (as base)
5557                 open $fd, "-|", git_cmd(), 'cat-file', 'blob', $hash
5558                         or die_error(500, "Open git-cat-file failed");
5559         } elsif ($format eq 'data') {
5560                 # run git-blame --incremental
5561                 open $fd, "-|", git_cmd(), "blame", "--incremental",
5562                         $hash_base, "--", $file_name
5563                         or die_error(500, "Open git-blame --incremental failed");
5564         } else {
5565                 # run git-blame --porcelain
5566                 open $fd, "-|", git_cmd(), "blame", '-p',
5567                         $hash_base, '--', $file_name
5568                         or die_error(500, "Open git-blame --porcelain failed");
5569         }
5570
5571         # incremental blame data returns early
5572         if ($format eq 'data') {
5573                 print $cgi->header(
5574                         -type=>"text/plain", -charset => "utf-8",
5575                         -status=> "200 OK");
5576                 local $| = 1; # output autoflush
5577                 print while <$fd>;
5578                 close $fd
5579                         or print "ERROR $!\n";
5580
5581                 print 'END';
5582                 if (defined $t0 && gitweb_check_feature('timed')) {
5583                         print ' '.
5584                               tv_interval($t0, [ gettimeofday() ]).
5585                               ' '.$number_of_git_cmds;
5586                 }
5587                 print "\n";
5588
5589                 return;
5590         }
5591
5592         # page header
5593         git_header_html();
5594         my $formats_nav =
5595                 $cgi->a({-href => href(action=>"blob", -replay=>1)},
5596                         "blob") .
5597                 " | ";
5598         if ($format eq 'incremental') {
5599                 $formats_nav .=
5600                         $cgi->a({-href => href(action=>"blame", javascript=>0, -replay=>1)},
5601                                 "blame") . " (non-incremental)";
5602         } else {
5603                 $formats_nav .=
5604                         $cgi->a({-href => href(action=>"blame_incremental", -replay=>1)},
5605                                 "blame") . " (incremental)";
5606         }
5607         $formats_nav .=
5608                 " | " .
5609                 $cgi->a({-href => href(action=>"history", -replay=>1)},
5610                         "history") .
5611                 " | " .
5612                 $cgi->a({-href => href(action=>$action, file_name=>$file_name)},
5613                         "HEAD");
5614         git_print_page_nav('','', $hash_base,$co{'tree'},$hash_base, $formats_nav);
5615         git_print_header_div('commit', esc_html($co{'title'}), $hash_base);
5616         git_print_page_path($file_name, $ftype, $hash_base);
5617
5618         # page body
5619         if ($format eq 'incremental') {
5620                 print "<noscript>\n<div class=\"error\"><center><b>\n".
5621                       "This page requires JavaScript to run.\n Use ".
5622                       $cgi->a({-href => href(action=>'blame',javascript=>0,-replay=>1)},
5623                               'this page').
5624                       " instead.\n".
5625                       "</b></center></div>\n</noscript>\n";
5626
5627                 print qq!<div id="progress_bar" style="width: 100%; background-color: yellow"></div>\n!;
5628         }
5629
5630         print qq!<div class="page_body">\n!;
5631         print qq!<div id="progress_info">... / ...</div>\n!
5632                 if ($format eq 'incremental');
5633         print qq!<table id="blame_table" class="blame" width="100%">\n!.
5634               #qq!<col width="5.5em" /><col width="2.5em" /><col width="*" />\n!.
5635               qq!<thead>\n!.
5636               qq!<tr><th>Commit</th><th>Line</th><th>Data</th></tr>\n!.
5637               qq!</thead>\n!.
5638               qq!<tbody>\n!;
5639
5640         my @rev_color = qw(light dark);
5641         my $num_colors = scalar(@rev_color);
5642         my $current_color = 0;
5643
5644         if ($format eq 'incremental') {
5645                 my $color_class = $rev_color[$current_color];
5646
5647                 #contents of a file
5648                 my $linenr = 0;
5649         LINE:
5650                 while (my $line = <$fd>) {
5651                         chomp $line;
5652                         $linenr++;
5653
5654                         print qq!<tr id="l$linenr" class="$color_class">!.
5655                               qq!<td class="sha1"><a href=""> </a></td>!.
5656                               qq!<td class="linenr">!.
5657                               qq!<a class="linenr" href="">$linenr</a></td>!;
5658                         print qq!<td class="pre">! . esc_html($line) . "</td>\n";
5659                         print qq!</tr>\n!;
5660                 }
5661
5662         } else { # porcelain, i.e. ordinary blame
5663                 my %metainfo = (); # saves information about commits
5664
5665                 # blame data
5666         LINE:
5667                 while (my $line = <$fd>) {
5668                         chomp $line;
5669                         # the header: <SHA-1> <src lineno> <dst lineno> [<lines in group>]
5670                         # no <lines in group> for subsequent lines in group of lines
5671                         my ($full_rev, $orig_lineno, $lineno, $group_size) =
5672                            ($line =~ /^([0-9a-f]{40}) (\d+) (\d+)(?: (\d+))?$/);
5673                         if (!exists $metainfo{$full_rev}) {
5674                                 $metainfo{$full_rev} = { 'nprevious' => 0 };
5675                         }
5676                         my $meta = $metainfo{$full_rev};
5677                         my $data;
5678                         while ($data = <$fd>) {
5679                                 chomp $data;
5680                                 last if ($data =~ s/^\t//); # contents of line
5681                                 if ($data =~ /^(\S+)(?: (.*))?$/) {
5682                                         $meta->{$1} = $2 unless exists $meta->{$1};
5683                                 }
5684                                 if ($data =~ /^previous /) {
5685                                         $meta->{'nprevious'}++;
5686                                 }
5687                         }
5688                         my $short_rev = substr($full_rev, 0, 8);
5689                         my $author = $meta->{'author'};
5690                         my %date =
5691                                 parse_date($meta->{'author-time'}, $meta->{'author-tz'});
5692                         my $date = $date{'iso-tz'};
5693                         if ($group_size) {
5694                                 $current_color = ($current_color + 1) % $num_colors;
5695                         }
5696                         my $tr_class = $rev_color[$current_color];
5697                         $tr_class .= ' boundary' if (exists $meta->{'boundary'});
5698                         $tr_class .= ' no-previous' if ($meta->{'nprevious'} == 0);
5699                         $tr_class .= ' multiple-previous' if ($meta->{'nprevious'} > 1);
5700                         print "<tr id=\"l$lineno\" class=\"$tr_class\">\n";
5701                         if ($group_size) {
5702                                 print "<td class=\"sha1\"";
5703                                 print " title=\"". esc_html($author) . ", $date\"";
5704                                 print " rowspan=\"$group_size\"" if ($group_size > 1);
5705                                 print ">";
5706                                 print $cgi->a({-href => href(action=>"commit",
5707                                                              hash=>$full_rev,
5708                                                              file_name=>$file_name)},
5709                                               esc_html($short_rev));
5710                                 if ($group_size >= 2) {
5711                                         my @author_initials = ($author =~ /\b([[:upper:]])\B/g);
5712                                         if (@author_initials) {
5713                                                 print "<br />" .
5714                                                       esc_html(join('', @author_initials));
5715                                                 #           or join('.', ...)
5716                                         }
5717                                 }
5718                                 print "</td>\n";
5719                         }
5720                         # 'previous' <sha1 of parent commit> <filename at commit>
5721                         if (exists $meta->{'previous'} &&
5722                             $meta->{'previous'} =~ /^([a-fA-F0-9]{40}) (.*)$/) {
5723                                 $meta->{'parent'} = $1;
5724                                 $meta->{'file_parent'} = unquote($2);
5725                         }
5726                         my $linenr_commit =
5727                                 exists($meta->{'parent'}) ?
5728                                 $meta->{'parent'} : $full_rev;
5729                         my $linenr_filename =
5730                                 exists($meta->{'file_parent'}) ?
5731                                 $meta->{'file_parent'} : unquote($meta->{'filename'});
5732                         my $blamed = href(action => 'blame',
5733                                           file_name => $linenr_filename,
5734                                           hash_base => $linenr_commit);
5735                         print "<td class=\"linenr\">";
5736                         print $cgi->a({ -href => "$blamed#l$orig_lineno",
5737                                         -class => "linenr" },
5738                                       esc_html($lineno));
5739                         print "</td>";
5740                         print "<td class=\"pre\">" . esc_html($data) . "</td>\n";
5741                         print "</tr>\n";
5742                 } # end while
5743
5744         }
5745
5746         # footer
5747         print "</tbody>\n".
5748               "</table>\n"; # class="blame"
5749         print "</div>\n";   # class="blame_body"
5750         close $fd
5751                 or print "Reading blob failed\n";
5752
5753         git_footer_html();
5754 }
5755
5756 sub git_blame {
5757         git_blame_common();
5758 }
5759
5760 sub git_blame_incremental {
5761         git_blame_common('incremental');
5762 }
5763
5764 sub git_blame_data {
5765         git_blame_common('data');
5766 }
5767
5768 sub git_tags {
5769         my $head = git_get_head_hash($project);
5770         git_header_html();
5771         git_print_page_nav('','', $head,undef,$head,format_ref_views('tags'));
5772         git_print_header_div('summary', $project);
5773
5774         my @tagslist = git_get_tags_list();
5775         if (@tagslist) {
5776                 git_tags_body(\@tagslist);
5777         }
5778         git_footer_html();
5779 }
5780
5781 sub git_heads {
5782         my $head = git_get_head_hash($project);
5783         git_header_html();
5784         git_print_page_nav('','', $head,undef,$head,format_ref_views('heads'));
5785         git_print_header_div('summary', $project);
5786
5787         my @headslist = git_get_heads_list();
5788         if (@headslist) {
5789                 git_heads_body(\@headslist, $head);
5790         }
5791         git_footer_html();
5792 }
5793
5794 # used both for single remote view and for list of all the remotes
5795 sub git_remotes {
5796         gitweb_check_feature('remote_heads')
5797                 or die_error(403, "Remote heads view is disabled");
5798
5799         my $head = git_get_head_hash($project);
5800         my $remote = $input_params{'hash'};
5801
5802         my $remotedata = git_get_remotes_list($remote);
5803         die_error(500, "Unable to get remote information") unless defined $remotedata;
5804
5805         unless (%$remotedata) {
5806                 die_error(404, defined $remote ?
5807                         "Remote $remote not found" :
5808                         "No remotes found");
5809         }
5810
5811         git_header_html(undef, undef, -action_extra => $remote);
5812         git_print_page_nav('', '',  $head, undef, $head,
5813                 format_ref_views($remote ? '' : 'remotes'));
5814
5815         fill_remote_heads($remotedata);
5816         if (defined $remote) {
5817                 git_print_header_div('remotes', "$remote remote for $project");
5818                 git_remote_block($remote, $remotedata->{$remote}, undef, $head);
5819         } else {
5820                 git_print_header_div('summary', "$project remotes");
5821                 git_remotes_body($remotedata, undef, $head);
5822         }
5823
5824         git_footer_html();
5825 }
5826
5827 sub git_blob_plain {
5828         my $type = shift;
5829         my $expires;
5830
5831         if (!defined $hash) {
5832                 if (defined $file_name) {
5833                         my $base = $hash_base || git_get_head_hash($project);
5834                         $hash = git_get_hash_by_path($base, $file_name, "blob")
5835                                 or die_error(404, "Cannot find file");
5836                 } else {
5837                         die_error(400, "No file name defined");
5838                 }
5839         } elsif ($hash =~ m/^[0-9a-fA-F]{40}$/) {
5840                 # blobs defined by non-textual hash id's can be cached
5841                 $expires = "+1d";
5842         }
5843
5844         open my $fd, "-|", git_cmd(), "cat-file", "blob", $hash
5845                 or die_error(500, "Open git-cat-file blob '$hash' failed");
5846
5847         # content-type (can include charset)
5848         $type = blob_contenttype($fd, $file_name, $type);
5849
5850         # "save as" filename, even when no $file_name is given
5851         my $save_as = "$hash";
5852         if (defined $file_name) {
5853                 $save_as = $file_name;
5854         } elsif ($type =~ m/^text\//) {
5855                 $save_as .= '.txt';
5856         }
5857
5858         # With XSS prevention on, blobs of all types except a few known safe
5859         # ones are served with "Content-Disposition: attachment" to make sure
5860         # they don't run in our security domain.  For certain image types,
5861         # blob view writes an <img> tag referring to blob_plain view, and we
5862         # want to be sure not to break that by serving the image as an
5863         # attachment (though Firefox 3 doesn't seem to care).
5864         my $sandbox = $prevent_xss &&
5865                 $type !~ m!^(?:text/plain|image/(?:gif|png|jpeg))$!;
5866
5867         print $cgi->header(
5868                 -type => $type,
5869                 -expires => $expires,
5870                 -content_disposition =>
5871                         ($sandbox ? 'attachment' : 'inline')
5872                         . '; filename="' . $save_as . '"');
5873         local $/ = undef;
5874         binmode STDOUT, ':raw';
5875         print <$fd>;
5876         binmode STDOUT, ':utf8'; # as set at the beginning of gitweb.cgi
5877         close $fd;
5878 }
5879
5880 sub git_blob {
5881         my $expires;
5882
5883         if (!defined $hash) {
5884                 if (defined $file_name) {
5885                         my $base = $hash_base || git_get_head_hash($project);
5886                         $hash = git_get_hash_by_path($base, $file_name, "blob")
5887                                 or die_error(404, "Cannot find file");
5888                 } else {
5889                         die_error(400, "No file name defined");
5890                 }
5891         } elsif ($hash =~ m/^[0-9a-fA-F]{40}$/) {
5892                 # blobs defined by non-textual hash id's can be cached
5893                 $expires = "+1d";
5894         }
5895
5896         my $have_blame = gitweb_check_feature('blame');
5897         open my $fd, "-|", git_cmd(), "cat-file", "blob", $hash
5898                 or die_error(500, "Couldn't cat $file_name, $hash");
5899         my $mimetype = blob_mimetype($fd, $file_name);
5900         # use 'blob_plain' (aka 'raw') view for files that cannot be displayed
5901         if ($mimetype !~ m!^(?:text/|image/(?:gif|png|jpeg)$)! && -B $fd) {
5902                 close $fd;
5903                 return git_blob_plain($mimetype);
5904         }
5905         # we can have blame only for text/* mimetype
5906         $have_blame &&= ($mimetype =~ m!^text/!);
5907
5908         my $highlight = gitweb_check_feature('highlight');
5909         my $syntax = guess_file_syntax($highlight, $mimetype, $file_name);
5910         $fd = run_highlighter($fd, $highlight, $syntax)
5911                 if $syntax;
5912
5913         git_header_html(undef, $expires);
5914         my $formats_nav = '';
5915         if (defined $hash_base && (my %co = parse_commit($hash_base))) {
5916                 if (defined $file_name) {
5917                         if ($have_blame) {
5918                                 $formats_nav .=
5919                                         $cgi->a({-href => href(action=>"blame", -replay=>1)},
5920                                                 "blame") .
5921                                         " | ";
5922                         }
5923                         $formats_nav .=
5924                                 $cgi->a({-href => href(action=>"history", -replay=>1)},
5925                                         "history") .
5926                                 " | " .
5927                                 $cgi->a({-href => href(action=>"blob_plain", -replay=>1)},
5928                                         "raw") .
5929                                 " | " .
5930                                 $cgi->a({-href => href(action=>"blob",
5931                                                        hash_base=>"HEAD", file_name=>$file_name)},
5932                                         "HEAD");
5933                 } else {
5934                         $formats_nav .=
5935                                 $cgi->a({-href => href(action=>"blob_plain", -replay=>1)},
5936                                         "raw");
5937                 }
5938                 git_print_page_nav('','', $hash_base,$co{'tree'},$hash_base, $formats_nav);
5939                 git_print_header_div('commit', esc_html($co{'title'}), $hash_base);
5940         } else {
5941                 print "<div class=\"page_nav\">\n" .
5942                       "<br/><br/></div>\n" .
5943                       "<div class=\"title\">".esc_html($hash)."</div>\n";
5944         }
5945         git_print_page_path($file_name, "blob", $hash_base);
5946         print "<div class=\"page_body\">\n";
5947         if ($mimetype =~ m!^image/!) {
5948                 print qq!<img type="!.esc_attr($mimetype).qq!"!;
5949                 if ($file_name) {
5950                         print qq! alt="!.esc_attr($file_name).qq!" title="!.esc_attr($file_name).qq!"!;
5951                 }
5952                 print qq! src="! .
5953                       href(action=>"blob_plain", hash=>$hash,
5954                            hash_base=>$hash_base, file_name=>$file_name) .
5955                       qq!" />\n!;
5956         } else {
5957                 my $nr;
5958                 while (my $line = <$fd>) {
5959                         chomp $line;
5960                         $nr++;
5961                         $line = untabify($line);
5962                         printf qq!<div class="pre"><a id="l%i" href="%s#l%i" class="linenr">%4i</a> %s</div>\n!,
5963                                $nr, esc_attr(href(-replay => 1)), $nr, $nr, $syntax ? $line : esc_html($line, -nbsp=>1);
5964                 }
5965         }
5966         close $fd
5967                 or print "Reading blob failed.\n";
5968         print "</div>";
5969         git_footer_html();
5970 }
5971
5972 sub git_tree {
5973         if (!defined $hash_base) {
5974                 $hash_base = "HEAD";
5975         }
5976         if (!defined $hash) {
5977                 if (defined $file_name) {
5978                         $hash = git_get_hash_by_path($hash_base, $file_name, "tree");
5979                 } else {
5980                         $hash = $hash_base;
5981                 }
5982         }
5983         die_error(404, "No such tree") unless defined($hash);
5984
5985         my $show_sizes = gitweb_check_feature('show-sizes');
5986         my $have_blame = gitweb_check_feature('blame');
5987
5988         my @entries = ();
5989         {
5990                 local $/ = "\0";
5991                 open my $fd, "-|", git_cmd(), "ls-tree", '-z',
5992                         ($show_sizes ? '-l' : ()), @extra_options, $hash
5993                         or die_error(500, "Open git-ls-tree failed");
5994                 @entries = map { chomp; $_ } <$fd>;
5995                 close $fd
5996                         or die_error(404, "Reading tree failed");
5997         }
5998
5999         my $refs = git_get_references();
6000         my $ref = format_ref_marker($refs, $hash_base);
6001         git_header_html();
6002         my $basedir = '';
6003         if (defined $hash_base && (my %co = parse_commit($hash_base))) {
6004                 my @views_nav = ();
6005                 if (defined $file_name) {
6006                         push @views_nav,
6007                                 $cgi->a({-href => href(action=>"history", -replay=>1)},
6008                                         "history"),
6009                                 $cgi->a({-href => href(action=>"tree",
6010                                                        hash_base=>"HEAD", file_name=>$file_name)},
6011                                         "HEAD"),
6012                 }
6013                 my $snapshot_links = format_snapshot_links($hash);
6014                 if (defined $snapshot_links) {
6015                         # FIXME: Should be available when we have no hash base as well.
6016                         push @views_nav, $snapshot_links;
6017                 }
6018                 git_print_page_nav('tree','', $hash_base, undef, undef,
6019                                    join(' | ', @views_nav));
6020                 git_print_header_div('commit', esc_html($co{'title'}) . $ref, $hash_base);
6021         } else {
6022                 undef $hash_base;
6023                 print "<div class=\"page_nav\">\n";
6024                 print "<br/><br/></div>\n";
6025                 print "<div class=\"title\">".esc_html($hash)."</div>\n";
6026         }
6027         if (defined $file_name) {
6028                 $basedir = $file_name;
6029                 if ($basedir ne '' && substr($basedir, -1) ne '/') {
6030                         $basedir .= '/';
6031                 }
6032                 git_print_page_path($file_name, 'tree', $hash_base);
6033         }
6034         print "<div class=\"page_body\">\n";
6035         print "<table class=\"tree\">\n";
6036         my $alternate = 1;
6037         # '..' (top directory) link if possible
6038         if (defined $hash_base &&
6039             defined $file_name && $file_name =~ m![^/]+$!) {
6040                 if ($alternate) {
6041                         print "<tr class=\"dark\">\n";
6042                 } else {
6043                         print "<tr class=\"light\">\n";
6044                 }
6045                 $alternate ^= 1;
6046
6047                 my $up = $file_name;
6048                 $up =~ s!/?[^/]+$!!;
6049                 undef $up unless $up;
6050                 # based on git_print_tree_entry
6051                 print '<td class="mode">' . mode_str('040000') . "</td>\n";
6052                 print '<td class="size">&nbsp;</td>'."\n" if $show_sizes;
6053                 print '<td class="list">';
6054                 print $cgi->a({-href => href(action=>"tree",
6055                                              hash_base=>$hash_base,
6056                                              file_name=>$up)},
6057                               "..");
6058                 print "</td>\n";
6059                 print "<td class=\"link\"></td>\n";
6060
6061                 print "</tr>\n";
6062         }
6063         foreach my $line (@entries) {
6064                 my %t = parse_ls_tree_line($line, -z => 1, -l => $show_sizes);
6065
6066                 if ($alternate) {
6067                         print "<tr class=\"dark\">\n";
6068                 } else {
6069                         print "<tr class=\"light\">\n";
6070                 }
6071                 $alternate ^= 1;
6072
6073                 git_print_tree_entry(\%t, $basedir, $hash_base, $have_blame);
6074
6075                 print "</tr>\n";
6076         }
6077         print "</table>\n" .
6078               "</div>";
6079         git_footer_html();
6080 }
6081
6082 sub snapshot_name {
6083         my ($project, $hash) = @_;
6084
6085         # path/to/project.git  -> project
6086         # path/to/project/.git -> project
6087         my $name = to_utf8($project);
6088         $name =~ s,([^/])/*\.git$,$1,;
6089         $name = basename($name);
6090         # sanitize name
6091         $name =~ s/[[:cntrl:]]/?/g;
6092
6093         my $ver = $hash;
6094         if ($hash =~ /^[0-9a-fA-F]+$/) {
6095                 # shorten SHA-1 hash
6096                 my $full_hash = git_get_full_hash($project, $hash);
6097                 if ($full_hash =~ /^$hash/ && length($hash) > 7) {
6098                         $ver = git_get_short_hash($project, $hash);
6099                 }
6100         } elsif ($hash =~ m!^refs/tags/(.*)$!) {
6101                 # tags don't need shortened SHA-1 hash
6102                 $ver = $1;
6103         } else {
6104                 # branches and other need shortened SHA-1 hash
6105                 if ($hash =~ m!^refs/(?:heads|remotes)/(.*)$!) {
6106                         $ver = $1;
6107                 }
6108                 $ver .= '-' . git_get_short_hash($project, $hash);
6109         }
6110         # in case of hierarchical branch names
6111         $ver =~ s!/!.!g;
6112
6113         # name = project-version_string
6114         $name = "$name-$ver";
6115
6116         return wantarray ? ($name, $name) : $name;
6117 }
6118
6119 sub git_snapshot {
6120         my $format = $input_params{'snapshot_format'};
6121         if (!@snapshot_fmts) {
6122                 die_error(403, "Snapshots not allowed");
6123         }
6124         # default to first supported snapshot format
6125         $format ||= $snapshot_fmts[0];
6126         if ($format !~ m/^[a-z0-9]+$/) {
6127                 die_error(400, "Invalid snapshot format parameter");
6128         } elsif (!exists($known_snapshot_formats{$format})) {
6129                 die_error(400, "Unknown snapshot format");
6130         } elsif ($known_snapshot_formats{$format}{'disabled'}) {
6131                 die_error(403, "Snapshot format not allowed");
6132         } elsif (!grep($_ eq $format, @snapshot_fmts)) {
6133                 die_error(403, "Unsupported snapshot format");
6134         }
6135
6136         my $type = git_get_type("$hash^{}");
6137         if (!$type) {
6138                 die_error(404, 'Object does not exist');
6139         }  elsif ($type eq 'blob') {
6140                 die_error(400, 'Object is not a tree-ish');
6141         }
6142
6143         my ($name, $prefix) = snapshot_name($project, $hash);
6144         my $filename = "$name$known_snapshot_formats{$format}{'suffix'}";
6145         my $cmd = quote_command(
6146                 git_cmd(), 'archive',
6147                 "--format=$known_snapshot_formats{$format}{'format'}",
6148                 "--prefix=$prefix/", $hash);
6149         if (exists $known_snapshot_formats{$format}{'compressor'}) {
6150                 $cmd .= ' | ' . quote_command(@{$known_snapshot_formats{$format}{'compressor'}});
6151         }
6152
6153         $filename =~ s/(["\\])/\\$1/g;
6154         print $cgi->header(
6155                 -type => $known_snapshot_formats{$format}{'type'},
6156                 -content_disposition => 'inline; filename="' . $filename . '"',
6157                 -status => '200 OK');
6158
6159         open my $fd, "-|", $cmd
6160                 or die_error(500, "Execute git-archive failed");
6161         binmode STDOUT, ':raw';
6162         print <$fd>;
6163         binmode STDOUT, ':utf8'; # as set at the beginning of gitweb.cgi
6164         close $fd;
6165 }
6166
6167 sub git_log_generic {
6168         my ($fmt_name, $body_subr, $base, $parent, $file_name, $file_hash) = @_;
6169
6170         my $head = git_get_head_hash($project);
6171         if (!defined $base) {
6172                 $base = $head;
6173         }
6174         if (!defined $page) {
6175                 $page = 0;
6176         }
6177         my $refs = git_get_references();
6178
6179         my $commit_hash = $base;
6180         if (defined $parent) {
6181                 $commit_hash = "$parent..$base";
6182         }
6183         my @commitlist =
6184                 parse_commits($commit_hash, 101, (100 * $page),
6185                               defined $file_name ? ($file_name, "--full-history") : ());
6186
6187         my $ftype;
6188         if (!defined $file_hash && defined $file_name) {
6189                 # some commits could have deleted file in question,
6190                 # and not have it in tree, but one of them has to have it
6191                 for (my $i = 0; $i < @commitlist; $i++) {
6192                         $file_hash = git_get_hash_by_path($commitlist[$i]{'id'}, $file_name);
6193                         last if defined $file_hash;
6194                 }
6195         }
6196         if (defined $file_hash) {
6197                 $ftype = git_get_type($file_hash);
6198         }
6199         if (defined $file_name && !defined $ftype) {
6200                 die_error(500, "Unknown type of object");
6201         }
6202         my %co;
6203         if (defined $file_name) {
6204                 %co = parse_commit($base)
6205                         or die_error(404, "Unknown commit object");
6206         }
6207
6208
6209         my $paging_nav = format_paging_nav($fmt_name, $page, $#commitlist >= 100);
6210         my $next_link = '';
6211         if ($#commitlist >= 100) {
6212                 $next_link =
6213                         $cgi->a({-href => href(-replay=>1, page=>$page+1),
6214                                  -accesskey => "n", -title => "Alt-n"}, "next");
6215         }
6216         my $patch_max = gitweb_get_feature('patches');
6217         if ($patch_max && !defined $file_name) {
6218                 if ($patch_max < 0 || @commitlist <= $patch_max) {
6219                         $paging_nav .= " &sdot; " .
6220                                 $cgi->a({-href => href(action=>"patches", -replay=>1)},
6221                                         "patches");
6222                 }
6223         }
6224
6225         git_header_html();
6226         git_print_page_nav($fmt_name,'', $hash,$hash,$hash, $paging_nav);
6227         if (defined $file_name) {
6228                 git_print_header_div('commit', esc_html($co{'title'}), $base);
6229         } else {
6230                 git_print_header_div('summary', $project)
6231         }
6232         git_print_page_path($file_name, $ftype, $hash_base)
6233                 if (defined $file_name);
6234
6235         $body_subr->(\@commitlist, 0, 99, $refs, $next_link,
6236                      $file_name, $file_hash, $ftype);
6237
6238         git_footer_html();
6239 }
6240
6241 sub git_log {
6242         git_log_generic('log', \&git_log_body,
6243                         $hash, $hash_parent);
6244 }
6245
6246 sub git_commit {
6247         $hash ||= $hash_base || "HEAD";
6248         my %co = parse_commit($hash)
6249             or die_error(404, "Unknown commit object");
6250
6251         my $parent  = $co{'parent'};
6252         my $parents = $co{'parents'}; # listref
6253
6254         # we need to prepare $formats_nav before any parameter munging
6255         my $formats_nav;
6256         if (!defined $parent) {
6257                 # --root commitdiff
6258                 $formats_nav .= '(initial)';
6259         } elsif (@$parents == 1) {
6260                 # single parent commit
6261                 $formats_nav .=
6262                         '(parent: ' .
6263                         $cgi->a({-href => href(action=>"commit",
6264                                                hash=>$parent)},
6265                                 esc_html(substr($parent, 0, 7))) .
6266                         ')';
6267         } else {
6268                 # merge commit
6269                 $formats_nav .=
6270                         '(merge: ' .
6271                         join(' ', map {
6272                                 $cgi->a({-href => href(action=>"commit",
6273                                                        hash=>$_)},
6274                                         esc_html(substr($_, 0, 7)));
6275                         } @$parents ) .
6276                         ')';
6277         }
6278         if (gitweb_check_feature('patches') && @$parents <= 1) {
6279                 $formats_nav .= " | " .
6280                         $cgi->a({-href => href(action=>"patch", -replay=>1)},
6281                                 "patch");
6282         }
6283
6284         if (!defined $parent) {
6285                 $parent = "--root";
6286         }
6287         my @difftree;
6288         open my $fd, "-|", git_cmd(), "diff-tree", '-r', "--no-commit-id",
6289                 @diff_opts,
6290                 (@$parents <= 1 ? $parent : '-c'),
6291                 $hash, "--"
6292                 or die_error(500, "Open git-diff-tree failed");
6293         @difftree = map { chomp; $_ } <$fd>;
6294         close $fd or die_error(404, "Reading git-diff-tree failed");
6295
6296         # non-textual hash id's can be cached
6297         my $expires;
6298         if ($hash =~ m/^[0-9a-fA-F]{40}$/) {
6299                 $expires = "+1d";
6300         }
6301         my $refs = git_get_references();
6302         my $ref = format_ref_marker($refs, $co{'id'});
6303
6304         git_header_html(undef, $expires);
6305         git_print_page_nav('commit', '',
6306                            $hash, $co{'tree'}, $hash,
6307                            $formats_nav);
6308
6309         if (defined $co{'parent'}) {
6310                 git_print_header_div('commitdiff', esc_html($co{'title'}) . $ref, $hash);
6311         } else {
6312                 git_print_header_div('tree', esc_html($co{'title'}) . $ref, $co{'tree'}, $hash);
6313         }
6314         print "<div class=\"title_text\">\n" .
6315               "<table class=\"object_header\">\n";
6316         git_print_authorship_rows(\%co);
6317         print "<tr><td>commit</td><td class=\"sha1\">$co{'id'}</td></tr>\n";
6318         print "<tr>" .
6319               "<td>tree</td>" .
6320               "<td class=\"sha1\">" .
6321               $cgi->a({-href => href(action=>"tree", hash=>$co{'tree'}, hash_base=>$hash),
6322                        class => "list"}, $co{'tree'}) .
6323               "</td>" .
6324               "<td class=\"link\">" .
6325               $cgi->a({-href => href(action=>"tree", hash=>$co{'tree'}, hash_base=>$hash)},
6326                       "tree");
6327         my $snapshot_links = format_snapshot_links($hash);
6328         if (defined $snapshot_links) {
6329                 print " | " . $snapshot_links;
6330         }
6331         print "</td>" .
6332               "</tr>\n";
6333
6334         foreach my $par (@$parents) {
6335                 print "<tr>" .
6336                       "<td>parent</td>" .
6337                       "<td class=\"sha1\">" .
6338                       $cgi->a({-href => href(action=>"commit", hash=>$par),
6339                                class => "list"}, $par) .
6340                       "</td>" .
6341                       "<td class=\"link\">" .
6342                       $cgi->a({-href => href(action=>"commit", hash=>$par)}, "commit") .
6343                       " | " .
6344                       $cgi->a({-href => href(action=>"commitdiff", hash=>$hash, hash_parent=>$par)}, "diff") .
6345                       "</td>" .
6346                       "</tr>\n";
6347         }
6348         print "</table>".
6349               "</div>\n";
6350
6351         print "<div class=\"page_body\">\n";
6352         git_print_log($co{'comment'});
6353         print "</div>\n";
6354
6355         git_difftree_body(\@difftree, $hash, @$parents);
6356
6357         git_footer_html();
6358 }
6359
6360 sub git_object {
6361         # object is defined by:
6362         # - hash or hash_base alone
6363         # - hash_base and file_name
6364         my $type;
6365
6366         # - hash or hash_base alone
6367         if ($hash || ($hash_base && !defined $file_name)) {
6368                 my $object_id = $hash || $hash_base;
6369
6370                 open my $fd, "-|", quote_command(
6371                         git_cmd(), 'cat-file', '-t', $object_id) . ' 2> /dev/null'
6372                         or die_error(404, "Object does not exist");
6373                 $type = <$fd>;
6374                 chomp $type;
6375                 close $fd
6376                         or die_error(404, "Object does not exist");
6377
6378         # - hash_base and file_name
6379         } elsif ($hash_base && defined $file_name) {
6380                 $file_name =~ s,/+$,,;
6381
6382                 system(git_cmd(), "cat-file", '-e', $hash_base) == 0
6383                         or die_error(404, "Base object does not exist");
6384
6385                 # here errors should not hapen
6386                 open my $fd, "-|", git_cmd(), "ls-tree", $hash_base, "--", $file_name
6387                         or die_error(500, "Open git-ls-tree failed");
6388                 my $line = <$fd>;
6389                 close $fd;
6390
6391                 #'100644 blob 0fa3f3a66fb6a137f6ec2c19351ed4d807070ffa  panic.c'
6392                 unless ($line && $line =~ m/^([0-9]+) (.+) ([0-9a-fA-F]{40})\t/) {
6393                         die_error(404, "File or directory for given base does not exist");
6394                 }
6395                 $type = $2;
6396                 $hash = $3;
6397         } else {
6398                 die_error(400, "Not enough information to find object");
6399         }
6400
6401         print $cgi->redirect(-uri => href(action=>$type, -full=>1,
6402                                           hash=>$hash, hash_base=>$hash_base,
6403                                           file_name=>$file_name),
6404                              -status => '302 Found');
6405 }
6406
6407 sub git_blobdiff {
6408         my $format = shift || 'html';
6409
6410         my $fd;
6411         my @difftree;
6412         my %diffinfo;
6413         my $expires;
6414
6415         # preparing $fd and %diffinfo for git_patchset_body
6416         # new style URI
6417         if (defined $hash_base && defined $hash_parent_base) {
6418                 if (defined $file_name) {
6419                         # read raw output
6420                         open $fd, "-|", git_cmd(), "diff-tree", '-r', @diff_opts,
6421                                 $hash_parent_base, $hash_base,
6422                                 "--", (defined $file_parent ? $file_parent : ()), $file_name
6423                                 or die_error(500, "Open git-diff-tree failed");
6424                         @difftree = map { chomp; $_ } <$fd>;
6425                         close $fd
6426                                 or die_error(404, "Reading git-diff-tree failed");
6427                         @difftree
6428                                 or die_error(404, "Blob diff not found");
6429
6430                 } elsif (defined $hash &&
6431                          $hash =~ /[0-9a-fA-F]{40}/) {
6432                         # try to find filename from $hash
6433
6434                         # read filtered raw output
6435                         open $fd, "-|", git_cmd(), "diff-tree", '-r', @diff_opts,
6436                                 $hash_parent_base, $hash_base, "--"
6437                                 or die_error(500, "Open git-diff-tree failed");
6438                         @difftree =
6439                                 # ':100644 100644 03b21826... 3b93d5e7... M     ls-files.c'
6440                                 # $hash == to_id
6441                                 grep { /^:[0-7]{6} [0-7]{6} [0-9a-fA-F]{40} $hash/ }
6442                                 map { chomp; $_ } <$fd>;
6443                         close $fd
6444                                 or die_error(404, "Reading git-diff-tree failed");
6445                         @difftree
6446                                 or die_error(404, "Blob diff not found");
6447
6448                 } else {
6449                         die_error(400, "Missing one of the blob diff parameters");
6450                 }
6451
6452                 if (@difftree > 1) {
6453                         die_error(400, "Ambiguous blob diff specification");
6454                 }
6455
6456                 %diffinfo = parse_difftree_raw_line($difftree[0]);
6457                 $file_parent ||= $diffinfo{'from_file'} || $file_name;
6458                 $file_name   ||= $diffinfo{'to_file'};
6459
6460                 $hash_parent ||= $diffinfo{'from_id'};
6461                 $hash        ||= $diffinfo{'to_id'};
6462
6463                 # non-textual hash id's can be cached
6464                 if ($hash_base =~ m/^[0-9a-fA-F]{40}$/ &&
6465                     $hash_parent_base =~ m/^[0-9a-fA-F]{40}$/) {
6466                         $expires = '+1d';
6467                 }
6468
6469                 # open patch output
6470                 open $fd, "-|", git_cmd(), "diff-tree", '-r', @diff_opts,
6471                         '-p', ($format eq 'html' ? "--full-index" : ()),
6472                         $hash_parent_base, $hash_base,
6473                         "--", (defined $file_parent ? $file_parent : ()), $file_name
6474                         or die_error(500, "Open git-diff-tree failed");
6475         }
6476
6477         # old/legacy style URI -- not generated anymore since 1.4.3.
6478         if (!%diffinfo) {
6479                 die_error('404 Not Found', "Missing one of the blob diff parameters")
6480         }
6481
6482         # header
6483         if ($format eq 'html') {
6484                 my $formats_nav =
6485                         $cgi->a({-href => href(action=>"blobdiff_plain", -replay=>1)},
6486                                 "raw");
6487                 git_header_html(undef, $expires);
6488                 if (defined $hash_base && (my %co = parse_commit($hash_base))) {
6489                         git_print_page_nav('','', $hash_base,$co{'tree'},$hash_base, $formats_nav);
6490                         git_print_header_div('commit', esc_html($co{'title'}), $hash_base);
6491                 } else {
6492                         print "<div class=\"page_nav\"><br/>$formats_nav<br/></div>\n";
6493                         print "<div class=\"title\">".esc_html("$hash vs $hash_parent")."</div>\n";
6494                 }
6495                 if (defined $file_name) {
6496                         git_print_page_path($file_name, "blob", $hash_base);
6497                 } else {
6498                         print "<div class=\"page_path\"></div>\n";
6499                 }
6500
6501         } elsif ($format eq 'plain') {
6502                 print $cgi->header(
6503                         -type => 'text/plain',
6504                         -charset => 'utf-8',
6505                         -expires => $expires,
6506                         -content_disposition => 'inline; filename="' . "$file_name" . '.patch"');
6507
6508                 print "X-Git-Url: " . $cgi->self_url() . "\n\n";
6509
6510         } else {
6511                 die_error(400, "Unknown blobdiff format");
6512         }
6513
6514         # patch
6515         if ($format eq 'html') {
6516                 print "<div class=\"page_body\">\n";
6517
6518                 git_patchset_body($fd, [ \%diffinfo ], $hash_base, $hash_parent_base);
6519                 close $fd;
6520
6521                 print "</div>\n"; # class="page_body"
6522                 git_footer_html();
6523
6524         } else {
6525                 while (my $line = <$fd>) {
6526                         $line =~ s!a/($hash|$hash_parent)!'a/'.esc_path($diffinfo{'from_file'})!eg;
6527                         $line =~ s!b/($hash|$hash_parent)!'b/'.esc_path($diffinfo{'to_file'})!eg;
6528
6529                         print $line;
6530
6531                         last if $line =~ m!^\+\+\+!;
6532                 }
6533                 local $/ = undef;
6534                 print <$fd>;
6535                 close $fd;
6536         }
6537 }
6538
6539 sub git_blobdiff_plain {
6540         git_blobdiff('plain');
6541 }
6542
6543 sub git_commitdiff {
6544         my %params = @_;
6545         my $format = $params{-format} || 'html';
6546
6547         my ($patch_max) = gitweb_get_feature('patches');
6548         if ($format eq 'patch') {
6549                 die_error(403, "Patch view not allowed") unless $patch_max;
6550         }
6551
6552         $hash ||= $hash_base || "HEAD";
6553         my %co = parse_commit($hash)
6554             or die_error(404, "Unknown commit object");
6555
6556         # choose format for commitdiff for merge
6557         if (! defined $hash_parent && @{$co{'parents'}} > 1) {
6558                 $hash_parent = '--cc';
6559         }
6560         # we need to prepare $formats_nav before almost any parameter munging
6561         my $formats_nav;
6562         if ($format eq 'html') {
6563                 $formats_nav =
6564                         $cgi->a({-href => href(action=>"commitdiff_plain", -replay=>1)},
6565                                 "raw");
6566                 if ($patch_max && @{$co{'parents'}} <= 1) {
6567                         $formats_nav .= " | " .
6568                                 $cgi->a({-href => href(action=>"patch", -replay=>1)},
6569                                         "patch");
6570                 }
6571
6572                 if (defined $hash_parent &&
6573                     $hash_parent ne '-c' && $hash_parent ne '--cc') {
6574                         # commitdiff with two commits given
6575                         my $hash_parent_short = $hash_parent;
6576                         if ($hash_parent =~ m/^[0-9a-fA-F]{40}$/) {
6577                                 $hash_parent_short = substr($hash_parent, 0, 7);
6578                         }
6579                         $formats_nav .=
6580                                 ' (from';
6581                         for (my $i = 0; $i < @{$co{'parents'}}; $i++) {
6582                                 if ($co{'parents'}[$i] eq $hash_parent) {
6583                                         $formats_nav .= ' parent ' . ($i+1);
6584                                         last;
6585                                 }
6586                         }
6587                         $formats_nav .= ': ' .
6588                                 $cgi->a({-href => href(action=>"commitdiff",
6589                                                        hash=>$hash_parent)},
6590                                         esc_html($hash_parent_short)) .
6591                                 ')';
6592                 } elsif (!$co{'parent'}) {
6593                         # --root commitdiff
6594                         $formats_nav .= ' (initial)';
6595                 } elsif (scalar @{$co{'parents'}} == 1) {
6596                         # single parent commit
6597                         $formats_nav .=
6598                                 ' (parent: ' .
6599                                 $cgi->a({-href => href(action=>"commitdiff",
6600                                                        hash=>$co{'parent'})},
6601                                         esc_html(substr($co{'parent'}, 0, 7))) .
6602                                 ')';
6603                 } else {
6604                         # merge commit
6605                         if ($hash_parent eq '--cc') {
6606                                 $formats_nav .= ' | ' .
6607                                         $cgi->a({-href => href(action=>"commitdiff",
6608                                                                hash=>$hash, hash_parent=>'-c')},
6609                                                 'combined');
6610                         } else { # $hash_parent eq '-c'
6611                                 $formats_nav .= ' | ' .
6612                                         $cgi->a({-href => href(action=>"commitdiff",
6613                                                                hash=>$hash, hash_parent=>'--cc')},
6614                                                 'compact');
6615                         }
6616                         $formats_nav .=
6617                                 ' (merge: ' .
6618                                 join(' ', map {
6619                                         $cgi->a({-href => href(action=>"commitdiff",
6620                                                                hash=>$_)},
6621                                                 esc_html(substr($_, 0, 7)));
6622                                 } @{$co{'parents'}} ) .
6623                                 ')';
6624                 }
6625         }
6626
6627         my $hash_parent_param = $hash_parent;
6628         if (!defined $hash_parent_param) {
6629                 # --cc for multiple parents, --root for parentless
6630                 $hash_parent_param =
6631                         @{$co{'parents'}} > 1 ? '--cc' : $co{'parent'} || '--root';
6632         }
6633
6634         # read commitdiff
6635         my $fd;
6636         my @difftree;
6637         if ($format eq 'html') {
6638                 open $fd, "-|", git_cmd(), "diff-tree", '-r', @diff_opts,
6639                         "--no-commit-id", "--patch-with-raw", "--full-index",
6640                         $hash_parent_param, $hash, "--"
6641                         or die_error(500, "Open git-diff-tree failed");
6642
6643                 while (my $line = <$fd>) {
6644                         chomp $line;
6645                         # empty line ends raw part of diff-tree output
6646                         last unless $line;
6647                         push @difftree, scalar parse_difftree_raw_line($line);
6648                 }
6649
6650         } elsif ($format eq 'plain') {
6651                 open $fd, "-|", git_cmd(), "diff-tree", '-r', @diff_opts,
6652                         '-p', $hash_parent_param, $hash, "--"
6653                         or die_error(500, "Open git-diff-tree failed");
6654         } elsif ($format eq 'patch') {
6655                 # For commit ranges, we limit the output to the number of
6656                 # patches specified in the 'patches' feature.
6657                 # For single commits, we limit the output to a single patch,
6658                 # diverging from the git-format-patch default.
6659                 my @commit_spec = ();
6660                 if ($hash_parent) {
6661                         if ($patch_max > 0) {
6662                                 push @commit_spec, "-$patch_max";
6663                         }
6664                         push @commit_spec, '-n', "$hash_parent..$hash";
6665                 } else {
6666                         if ($params{-single}) {
6667                                 push @commit_spec, '-1';
6668                         } else {
6669                                 if ($patch_max > 0) {
6670                                         push @commit_spec, "-$patch_max";
6671                                 }
6672                                 push @commit_spec, "-n";
6673                         }
6674                         push @commit_spec, '--root', $hash;
6675                 }
6676                 open $fd, "-|", git_cmd(), "format-patch", @diff_opts,
6677                         '--encoding=utf8', '--stdout', @commit_spec
6678                         or die_error(500, "Open git-format-patch failed");
6679         } else {
6680                 die_error(400, "Unknown commitdiff format");
6681         }
6682
6683         # non-textual hash id's can be cached
6684         my $expires;
6685         if ($hash =~ m/^[0-9a-fA-F]{40}$/) {
6686                 $expires = "+1d";
6687         }
6688
6689         # write commit message
6690         if ($format eq 'html') {
6691                 my $refs = git_get_references();
6692                 my $ref = format_ref_marker($refs, $co{'id'});
6693
6694                 git_header_html(undef, $expires);
6695                 git_print_page_nav('commitdiff','', $hash,$co{'tree'},$hash, $formats_nav);
6696                 git_print_header_div('commit', esc_html($co{'title'}) . $ref, $hash);
6697                 print "<div class=\"title_text\">\n" .
6698                       "<table class=\"object_header\">\n";
6699                 git_print_authorship_rows(\%co);
6700                 print "</table>".
6701                       "</div>\n";
6702                 print "<div class=\"page_body\">\n";
6703                 if (@{$co{'comment'}} > 1) {
6704                         print "<div class=\"log\">\n";
6705                         git_print_log($co{'comment'}, -final_empty_line=> 1, -remove_title => 1);
6706                         print "</div>\n"; # class="log"
6707                 }
6708
6709         } elsif ($format eq 'plain') {
6710                 my $refs = git_get_references("tags");
6711                 my $tagname = git_get_rev_name_tags($hash);
6712                 my $filename = basename($project) . "-$hash.patch";
6713
6714                 print $cgi->header(
6715                         -type => 'text/plain',
6716                         -charset => 'utf-8',
6717                         -expires => $expires,
6718                         -content_disposition => 'inline; filename="' . "$filename" . '"');
6719                 my %ad = parse_date($co{'author_epoch'}, $co{'author_tz'});
6720                 print "From: " . to_utf8($co{'author'}) . "\n";
6721                 print "Date: $ad{'rfc2822'} ($ad{'tz_local'})\n";
6722                 print "Subject: " . to_utf8($co{'title'}) . "\n";
6723
6724                 print "X-Git-Tag: $tagname\n" if $tagname;
6725                 print "X-Git-Url: " . $cgi->self_url() . "\n\n";
6726
6727                 foreach my $line (@{$co{'comment'}}) {
6728                         print to_utf8($line) . "\n";
6729                 }
6730                 print "---\n\n";
6731         } elsif ($format eq 'patch') {
6732                 my $filename = basename($project) . "-$hash.patch";
6733
6734                 print $cgi->header(
6735                         -type => 'text/plain',
6736                         -charset => 'utf-8',
6737                         -expires => $expires,
6738                         -content_disposition => 'inline; filename="' . "$filename" . '"');
6739         }
6740
6741         # write patch
6742         if ($format eq 'html') {
6743                 my $use_parents = !defined $hash_parent ||
6744                         $hash_parent eq '-c' || $hash_parent eq '--cc';
6745                 git_difftree_body(\@difftree, $hash,
6746                                   $use_parents ? @{$co{'parents'}} : $hash_parent);
6747                 print "<br/>\n";
6748
6749                 git_patchset_body($fd, \@difftree, $hash,
6750                                   $use_parents ? @{$co{'parents'}} : $hash_parent);
6751                 close $fd;
6752                 print "</div>\n"; # class="page_body"
6753                 git_footer_html();
6754
6755         } elsif ($format eq 'plain') {
6756                 local $/ = undef;
6757                 print <$fd>;
6758                 close $fd
6759                         or print "Reading git-diff-tree failed\n";
6760         } elsif ($format eq 'patch') {
6761                 local $/ = undef;
6762                 print <$fd>;
6763                 close $fd
6764                         or print "Reading git-format-patch failed\n";
6765         }
6766 }
6767
6768 sub git_commitdiff_plain {
6769         git_commitdiff(-format => 'plain');
6770 }
6771
6772 # format-patch-style patches
6773 sub git_patch {
6774         git_commitdiff(-format => 'patch', -single => 1);
6775 }
6776
6777 sub git_patches {
6778         git_commitdiff(-format => 'patch');
6779 }
6780
6781 sub git_history {
6782         git_log_generic('history', \&git_history_body,
6783                         $hash_base, $hash_parent_base,
6784                         $file_name, $hash);
6785 }
6786
6787 sub git_search {
6788         gitweb_check_feature('search') or die_error(403, "Search is disabled");
6789         if (!defined $searchtext) {
6790                 die_error(400, "Text field is empty");
6791         }
6792         if (!defined $hash) {
6793                 $hash = git_get_head_hash($project);
6794         }
6795         my %co = parse_commit($hash);
6796         if (!%co) {
6797                 die_error(404, "Unknown commit object");
6798         }
6799         if (!defined $page) {
6800                 $page = 0;
6801         }
6802
6803         $searchtype ||= 'commit';
6804         if ($searchtype eq 'pickaxe') {
6805                 # pickaxe may take all resources of your box and run for several minutes
6806                 # with every query - so decide by yourself how public you make this feature
6807                 gitweb_check_feature('pickaxe')
6808                     or die_error(403, "Pickaxe is disabled");
6809         }
6810         if ($searchtype eq 'grep') {
6811                 gitweb_check_feature('grep')
6812                     or die_error(403, "Grep is disabled");
6813         }
6814
6815         git_header_html();
6816
6817         if ($searchtype eq 'commit' or $searchtype eq 'author' or $searchtype eq 'committer') {
6818                 my $greptype;
6819                 if ($searchtype eq 'commit') {
6820                         $greptype = "--grep=";
6821                 } elsif ($searchtype eq 'author') {
6822                         $greptype = "--author=";
6823                 } elsif ($searchtype eq 'committer') {
6824                         $greptype = "--committer=";
6825                 }
6826                 $greptype .= $searchtext;
6827                 my @commitlist = parse_commits($hash, 101, (100 * $page), undef,
6828                                                $greptype, '--regexp-ignore-case',
6829                                                $search_use_regexp ? '--extended-regexp' : '--fixed-strings');
6830
6831                 my $paging_nav = '';
6832                 if ($page > 0) {
6833                         $paging_nav .=
6834                                 $cgi->a({-href => href(action=>"search", hash=>$hash,
6835                                                        searchtext=>$searchtext,
6836                                                        searchtype=>$searchtype)},
6837                                         "first");
6838                         $paging_nav .= " &sdot; " .
6839                                 $cgi->a({-href => href(-replay=>1, page=>$page-1),
6840                                          -accesskey => "p", -title => "Alt-p"}, "prev");
6841                 } else {
6842                         $paging_nav .= "first";
6843                         $paging_nav .= " &sdot; prev";
6844                 }
6845                 my $next_link = '';
6846                 if ($#commitlist >= 100) {
6847                         $next_link =
6848                                 $cgi->a({-href => href(-replay=>1, page=>$page+1),
6849                                          -accesskey => "n", -title => "Alt-n"}, "next");
6850                         $paging_nav .= " &sdot; $next_link";
6851                 } else {
6852                         $paging_nav .= " &sdot; next";
6853                 }
6854
6855                 git_print_page_nav('','', $hash,$co{'tree'},$hash, $paging_nav);
6856                 git_print_header_div('commit', esc_html($co{'title'}), $hash);
6857                 if ($page == 0 && !@commitlist) {
6858                         print "<p>No match.</p>\n";
6859                 } else {
6860                         git_search_grep_body(\@commitlist, 0, 99, $next_link);
6861                 }
6862         }
6863
6864         if ($searchtype eq 'pickaxe') {
6865                 git_print_page_nav('','', $hash,$co{'tree'},$hash);
6866                 git_print_header_div('commit', esc_html($co{'title'}), $hash);
6867
6868                 print "<table class=\"pickaxe search\">\n";
6869                 my $alternate = 1;
6870                 local $/ = "\n";
6871                 open my $fd, '-|', git_cmd(), '--no-pager', 'log', @diff_opts,
6872                         '--pretty=format:%H', '--no-abbrev', '--raw', "-S$searchtext",
6873                         ($search_use_regexp ? '--pickaxe-regex' : ());
6874                 undef %co;
6875                 my @files;
6876                 while (my $line = <$fd>) {
6877                         chomp $line;
6878                         next unless $line;
6879
6880                         my %set = parse_difftree_raw_line($line);
6881                         if (defined $set{'commit'}) {
6882                                 # finish previous commit
6883                                 if (%co) {
6884                                         print "</td>\n" .
6885                                               "<td class=\"link\">" .
6886                                               $cgi->a({-href => href(action=>"commit", hash=>$co{'id'})}, "commit") .
6887                                               " | " .
6888                                               $cgi->a({-href => href(action=>"tree", hash=>$co{'tree'}, hash_base=>$co{'id'})}, "tree");
6889                                         print "</td>\n" .
6890                                               "</tr>\n";
6891                                 }
6892
6893                                 if ($alternate) {
6894                                         print "<tr class=\"dark\">\n";
6895                                 } else {
6896                                         print "<tr class=\"light\">\n";
6897                                 }
6898                                 $alternate ^= 1;
6899                                 %co = parse_commit($set{'commit'});
6900                                 my $author = chop_and_escape_str($co{'author_name'}, 15, 5);
6901                                 print "<td title=\"$co{'age_string_age'}\"><i>$co{'age_string_date'}</i></td>\n" .
6902                                       "<td><i>$author</i></td>\n" .
6903                                       "<td>" .
6904                                       $cgi->a({-href => href(action=>"commit", hash=>$co{'id'}),
6905                                               -class => "list subject"},
6906                                               chop_and_escape_str($co{'title'}, 50) . "<br/>");
6907                         } elsif (defined $set{'to_id'}) {
6908                                 next if ($set{'to_id'} =~ m/^0{40}$/);
6909
6910                                 print $cgi->a({-href => href(action=>"blob", hash_base=>$co{'id'},
6911                                                              hash=>$set{'to_id'}, file_name=>$set{'to_file'}),
6912                                               -class => "list"},
6913                                               "<span class=\"match\">" . esc_path($set{'file'}) . "</span>") .
6914                                       "<br/>\n";
6915                         }
6916                 }
6917                 close $fd;
6918
6919                 # finish last commit (warning: repetition!)
6920                 if (%co) {
6921                         print "</td>\n" .
6922                               "<td class=\"link\">" .
6923                               $cgi->a({-href => href(action=>"commit", hash=>$co{'id'})}, "commit") .
6924                               " | " .
6925                               $cgi->a({-href => href(action=>"tree", hash=>$co{'tree'}, hash_base=>$co{'id'})}, "tree");
6926                         print "</td>\n" .
6927                               "</tr>\n";
6928                 }
6929
6930                 print "</table>\n";
6931         }
6932
6933         if ($searchtype eq 'grep') {
6934                 git_print_page_nav('','', $hash,$co{'tree'},$hash);
6935                 git_print_header_div('commit', esc_html($co{'title'}), $hash);
6936
6937                 print "<table class=\"grep_search\">\n";
6938                 my $alternate = 1;
6939                 my $matches = 0;
6940                 local $/ = "\n";
6941                 open my $fd, "-|", git_cmd(), 'grep', '-n',
6942                         $search_use_regexp ? ('-E', '-i') : '-F',
6943                         $searchtext, $co{'tree'};
6944                 my $lastfile = '';
6945                 while (my $line = <$fd>) {
6946                         chomp $line;
6947                         my ($file, $lno, $ltext, $binary);
6948                         last if ($matches++ > 1000);
6949                         if ($line =~ /^Binary file (.+) matches$/) {
6950                                 $file = $1;
6951                                 $binary = 1;
6952                         } else {
6953                                 (undef, $file, $lno, $ltext) = split(/:/, $line, 4);
6954                         }
6955                         if ($file ne $lastfile) {
6956                                 $lastfile and print "</td></tr>\n";
6957                                 if ($alternate++) {
6958                                         print "<tr class=\"dark\">\n";
6959                                 } else {
6960                                         print "<tr class=\"light\">\n";
6961                                 }
6962                                 print "<td class=\"list\">".
6963                                         $cgi->a({-href => href(action=>"blob", hash=>$co{'hash'},
6964                                                                file_name=>"$file"),
6965                                                 -class => "list"}, esc_path($file));
6966                                 print "</td><td>\n";
6967                                 $lastfile = $file;
6968                         }
6969                         if ($binary) {
6970                                 print "<div class=\"binary\">Binary file</div>\n";
6971                         } else {
6972                                 $ltext = untabify($ltext);
6973                                 if ($ltext =~ m/^(.*)($search_regexp)(.*)$/i) {
6974                                         $ltext = esc_html($1, -nbsp=>1);
6975                                         $ltext .= '<span class="match">';
6976                                         $ltext .= esc_html($2, -nbsp=>1);
6977                                         $ltext .= '</span>';
6978                                         $ltext .= esc_html($3, -nbsp=>1);
6979                                 } else {
6980                                         $ltext = esc_html($ltext, -nbsp=>1);
6981                                 }
6982                                 print "<div class=\"pre\">" .
6983                                         $cgi->a({-href => href(action=>"blob", hash=>$co{'hash'},
6984                                                                file_name=>"$file").'#l'.$lno,
6985                                                 -class => "linenr"}, sprintf('%4i', $lno))
6986                                         . ' ' .  $ltext . "</div>\n";
6987                         }
6988                 }
6989                 if ($lastfile) {
6990                         print "</td></tr>\n";
6991                         if ($matches > 1000) {
6992                                 print "<div class=\"diff nodifferences\">Too many matches, listing trimmed</div>\n";
6993                         }
6994                 } else {
6995                         print "<div class=\"diff nodifferences\">No matches found</div>\n";
6996                 }
6997                 close $fd;
6998
6999                 print "</table>\n";
7000         }
7001         git_footer_html();
7002 }
7003
7004 sub git_search_help {
7005         git_header_html();
7006         git_print_page_nav('','', $hash,$hash,$hash);
7007         print <<EOT;
7008 <p><strong>Pattern</strong> is by default a normal string that is matched precisely (but without
7009 regard to case, except in the case of pickaxe). However, when you check the <em>re</em> checkbox,
7010 the pattern entered is recognized as the POSIX extended
7011 <a href="http://en.wikipedia.org/wiki/Regular_expression">regular expression</a> (also case
7012 insensitive).</p>
7013 <dl>
7014 <dt><b>commit</b></dt>
7015 <dd>The commit messages and authorship information will be scanned for the given pattern.</dd>
7016 EOT
7017         my $have_grep = gitweb_check_feature('grep');
7018         if ($have_grep) {
7019                 print <<EOT;
7020 <dt><b>grep</b></dt>
7021 <dd>All files in the currently selected tree (HEAD unless you are explicitly browsing
7022     a different one) are searched for the given pattern. On large trees, this search can take
7023 a while and put some strain on the server, so please use it with some consideration. Note that
7024 due to git-grep peculiarity, currently if regexp mode is turned off, the matches are
7025 case-sensitive.</dd>
7026 EOT
7027         }
7028         print <<EOT;
7029 <dt><b>author</b></dt>
7030 <dd>Name and e-mail of the change author and date of birth of the patch will be scanned for the given pattern.</dd>
7031 <dt><b>committer</b></dt>
7032 <dd>Name and e-mail of the committer and date of commit will be scanned for the given pattern.</dd>
7033 EOT
7034         my $have_pickaxe = gitweb_check_feature('pickaxe');
7035         if ($have_pickaxe) {
7036                 print <<EOT;
7037 <dt><b>pickaxe</b></dt>
7038 <dd>All commits that caused the string to appear or disappear from any file (changes that
7039 added, removed or "modified" the string) will be listed. This search can take a while and
7040 takes a lot of strain on the server, so please use it wisely. Note that since you may be
7041 interested even in changes just changing the case as well, this search is case sensitive.</dd>
7042 EOT
7043         }
7044         print "</dl>\n";
7045         git_footer_html();
7046 }
7047
7048 sub git_shortlog {
7049         git_log_generic('shortlog', \&git_shortlog_body,
7050                         $hash, $hash_parent);
7051 }
7052
7053 ## ......................................................................
7054 ## feeds (RSS, Atom; OPML)
7055
7056 sub git_feed {
7057         my $format = shift || 'atom';
7058         my $have_blame = gitweb_check_feature('blame');
7059
7060         # Atom: http://www.atomenabled.org/developers/syndication/
7061         # RSS:  http://www.notestips.com/80256B3A007F2692/1/NAMO5P9UPQ
7062         if ($format ne 'rss' && $format ne 'atom') {
7063                 die_error(400, "Unknown web feed format");
7064         }
7065
7066         # log/feed of current (HEAD) branch, log of given branch, history of file/directory
7067         my $head = $hash || 'HEAD';
7068         my @commitlist = parse_commits($head, 150, 0, $file_name);
7069
7070         my %latest_commit;
7071         my %latest_date;
7072         my $content_type = "application/$format+xml";
7073         if (defined $cgi->http('HTTP_ACCEPT') &&
7074                  $cgi->Accept('text/xml') > $cgi->Accept($content_type)) {
7075                 # browser (feed reader) prefers text/xml
7076                 $content_type = 'text/xml';
7077         }
7078         if (defined($commitlist[0])) {
7079                 %latest_commit = %{$commitlist[0]};
7080                 my $latest_epoch = $latest_commit{'committer_epoch'};
7081                 %latest_date   = parse_date($latest_epoch, $latest_commit{'comitter_tz'});
7082                 my $if_modified = $cgi->http('IF_MODIFIED_SINCE');
7083                 if (defined $if_modified) {
7084                         my $since;
7085                         if (eval { require HTTP::Date; 1; }) {
7086                                 $since = HTTP::Date::str2time($if_modified);
7087                         } elsif (eval { require Time::ParseDate; 1; }) {
7088                                 $since = Time::ParseDate::parsedate($if_modified, GMT => 1);
7089                         }
7090                         if (defined $since && $latest_epoch <= $since) {
7091                                 print $cgi->header(
7092                                         -type => $content_type,
7093                                         -charset => 'utf-8',
7094                                         -last_modified => $latest_date{'rfc2822'},
7095                                         -status => '304 Not Modified');
7096                                 return;
7097                         }
7098                 }
7099                 print $cgi->header(
7100                         -type => $content_type,
7101                         -charset => 'utf-8',
7102                         -last_modified => $latest_date{'rfc2822'});
7103         } else {
7104                 print $cgi->header(
7105                         -type => $content_type,
7106                         -charset => 'utf-8');
7107         }
7108
7109         # Optimization: skip generating the body if client asks only
7110         # for Last-Modified date.
7111         return if ($cgi->request_method() eq 'HEAD');
7112
7113         # header variables
7114         my $title = "$site_name - $project/$action";
7115         my $feed_type = 'log';
7116         if (defined $hash) {
7117                 $title .= " - '$hash'";
7118                 $feed_type = 'branch log';
7119                 if (defined $file_name) {
7120                         $title .= " :: $file_name";
7121                         $feed_type = 'history';
7122                 }
7123         } elsif (defined $file_name) {
7124                 $title .= " - $file_name";
7125                 $feed_type = 'history';
7126         }
7127         $title .= " $feed_type";
7128         my $descr = git_get_project_description($project);
7129         if (defined $descr) {
7130                 $descr = esc_html($descr);
7131         } else {
7132                 $descr = "$project " .
7133                          ($format eq 'rss' ? 'RSS' : 'Atom') .
7134                          " feed";
7135         }
7136         my $owner = git_get_project_owner($project);
7137         $owner = esc_html($owner);
7138
7139         #header
7140         my $alt_url;
7141         if (defined $file_name) {
7142                 $alt_url = href(-full=>1, action=>"history", hash=>$hash, file_name=>$file_name);
7143         } elsif (defined $hash) {
7144                 $alt_url = href(-full=>1, action=>"log", hash=>$hash);
7145         } else {
7146                 $alt_url = href(-full=>1, action=>"summary");
7147         }
7148         print qq!<?xml version="1.0" encoding="utf-8"?>\n!;
7149         if ($format eq 'rss') {
7150                 print <<XML;
7151 <rss version="2.0" xmlns:content="http://purl.org/rss/1.0/modules/content/">
7152 <channel>
7153 XML
7154                 print "<title>$title</title>\n" .
7155                       "<link>$alt_url</link>\n" .
7156                       "<description>$descr</description>\n" .
7157                       "<language>en</language>\n" .
7158                       # project owner is responsible for 'editorial' content
7159                       "<managingEditor>$owner</managingEditor>\n";
7160                 if (defined $logo || defined $favicon) {
7161                         # prefer the logo to the favicon, since RSS
7162                         # doesn't allow both
7163                         my $img = esc_url($logo || $favicon);
7164                         print "<image>\n" .
7165                               "<url>$img</url>\n" .
7166                               "<title>$title</title>\n" .
7167                               "<link>$alt_url</link>\n" .
7168                               "</image>\n";
7169                 }
7170                 if (%latest_date) {
7171                         print "<pubDate>$latest_date{'rfc2822'}</pubDate>\n";
7172                         print "<lastBuildDate>$latest_date{'rfc2822'}</lastBuildDate>\n";
7173                 }
7174                 print "<generator>gitweb v.$version/$git_version</generator>\n";
7175         } elsif ($format eq 'atom') {
7176                 print <<XML;
7177 <feed xmlns="http://www.w3.org/2005/Atom">
7178 XML
7179                 print "<title>$title</title>\n" .
7180                       "<subtitle>$descr</subtitle>\n" .
7181                       '<link rel="alternate" type="text/html" href="' .
7182                       $alt_url . '" />' . "\n" .
7183                       '<link rel="self" type="' . $content_type . '" href="' .
7184                       $cgi->self_url() . '" />' . "\n" .
7185                       "<id>" . href(-full=>1) . "</id>\n" .
7186                       # use project owner for feed author
7187                       "<author><name>$owner</name></author>\n";
7188                 if (defined $favicon) {
7189                         print "<icon>" . esc_url($favicon) . "</icon>\n";
7190                 }
7191                 if (defined $logo) {
7192                         # not twice as wide as tall: 72 x 27 pixels
7193                         print "<logo>" . esc_url($logo) . "</logo>\n";
7194                 }
7195                 if (! %latest_date) {
7196                         # dummy date to keep the feed valid until commits trickle in:
7197                         print "<updated>1970-01-01T00:00:00Z</updated>\n";
7198                 } else {
7199                         print "<updated>$latest_date{'iso-8601'}</updated>\n";
7200                 }
7201                 print "<generator version='$version/$git_version'>gitweb</generator>\n";
7202         }
7203
7204         # contents
7205         for (my $i = 0; $i <= $#commitlist; $i++) {
7206                 my %co = %{$commitlist[$i]};
7207                 my $commit = $co{'id'};
7208                 # we read 150, we always show 30 and the ones more recent than 48 hours
7209                 if (($i >= 20) && ((time - $co{'author_epoch'}) > 48*60*60)) {
7210                         last;
7211                 }
7212                 my %cd = parse_date($co{'author_epoch'}, $co{'author_tz'});
7213
7214                 # get list of changed files
7215                 open my $fd, "-|", git_cmd(), "diff-tree", '-r', @diff_opts,
7216                         $co{'parent'} || "--root",
7217                         $co{'id'}, "--", (defined $file_name ? $file_name : ())
7218                         or next;
7219                 my @difftree = map { chomp; $_ } <$fd>;
7220                 close $fd
7221                         or next;
7222
7223                 # print element (entry, item)
7224                 my $co_url = href(-full=>1, action=>"commitdiff", hash=>$commit);
7225                 if ($format eq 'rss') {
7226                         print "<item>\n" .
7227                               "<title>" . esc_html($co{'title'}) . "</title>\n" .
7228                               "<author>" . esc_html($co{'author'}) . "</author>\n" .
7229                               "<pubDate>$cd{'rfc2822'}</pubDate>\n" .
7230                               "<guid isPermaLink=\"true\">$co_url</guid>\n" .
7231                               "<link>$co_url</link>\n" .
7232                               "<description>" . esc_html($co{'title'}) . "</description>\n" .
7233                               "<content:encoded>" .
7234                               "<![CDATA[\n";
7235                 } elsif ($format eq 'atom') {
7236                         print "<entry>\n" .
7237                               "<title type=\"html\">" . esc_html($co{'title'}) . "</title>\n" .
7238                               "<updated>$cd{'iso-8601'}</updated>\n" .
7239                               "<author>\n" .
7240                               "  <name>" . esc_html($co{'author_name'}) . "</name>\n";
7241                         if ($co{'author_email'}) {
7242                                 print "  <email>" . esc_html($co{'author_email'}) . "</email>\n";
7243                         }
7244                         print "</author>\n" .
7245                               # use committer for contributor
7246                               "<contributor>\n" .
7247                               "  <name>" . esc_html($co{'committer_name'}) . "</name>\n";
7248                         if ($co{'committer_email'}) {
7249                                 print "  <email>" . esc_html($co{'committer_email'}) . "</email>\n";
7250                         }
7251                         print "</contributor>\n" .
7252                               "<published>$cd{'iso-8601'}</published>\n" .
7253                               "<link rel=\"alternate\" type=\"text/html\" href=\"$co_url\" />\n" .
7254                               "<id>$co_url</id>\n" .
7255                               "<content type=\"xhtml\" xml:base=\"" . esc_url($my_url) . "\">\n" .
7256                               "<div xmlns=\"http://www.w3.org/1999/xhtml\">\n";
7257                 }
7258                 my $comment = $co{'comment'};
7259                 print "<pre>\n";
7260                 foreach my $line (@$comment) {
7261                         $line = esc_html($line);
7262                         print "$line\n";
7263                 }
7264                 print "</pre><ul>\n";
7265                 foreach my $difftree_line (@difftree) {
7266                         my %difftree = parse_difftree_raw_line($difftree_line);
7267                         next if !$difftree{'from_id'};
7268
7269                         my $file = $difftree{'file'} || $difftree{'to_file'};
7270
7271                         print "<li>" .
7272                               "[" .
7273                               $cgi->a({-href => href(-full=>1, action=>"blobdiff",
7274                                                      hash=>$difftree{'to_id'}, hash_parent=>$difftree{'from_id'},
7275                                                      hash_base=>$co{'id'}, hash_parent_base=>$co{'parent'},
7276                                                      file_name=>$file, file_parent=>$difftree{'from_file'}),
7277                                       -title => "diff"}, 'D');
7278                         if ($have_blame) {
7279                                 print $cgi->a({-href => href(-full=>1, action=>"blame",
7280                                                              file_name=>$file, hash_base=>$commit),
7281                                               -title => "blame"}, 'B');
7282                         }
7283                         # if this is not a feed of a file history
7284                         if (!defined $file_name || $file_name ne $file) {
7285                                 print $cgi->a({-href => href(-full=>1, action=>"history",
7286                                                              file_name=>$file, hash=>$commit),
7287                                               -title => "history"}, 'H');
7288                         }
7289                         $file = esc_path($file);
7290                         print "] ".
7291                               "$file</li>\n";
7292                 }
7293                 if ($format eq 'rss') {
7294                         print "</ul>]]>\n" .
7295                               "</content:encoded>\n" .
7296                               "</item>\n";
7297                 } elsif ($format eq 'atom') {
7298                         print "</ul>\n</div>\n" .
7299                               "</content>\n" .
7300                               "</entry>\n";
7301                 }
7302         }
7303
7304         # end of feed
7305         if ($format eq 'rss') {
7306                 print "</channel>\n</rss>\n";
7307         } elsif ($format eq 'atom') {
7308                 print "</feed>\n";
7309         }
7310 }
7311
7312 sub git_rss {
7313         git_feed('rss');
7314 }
7315
7316 sub git_atom {
7317         git_feed('atom');
7318 }
7319
7320 sub git_opml {
7321         my @list = git_get_projects_list();
7322
7323         print $cgi->header(
7324                 -type => 'text/xml',
7325                 -charset => 'utf-8',
7326                 -content_disposition => 'inline; filename="opml.xml"');
7327
7328         print <<XML;
7329 <?xml version="1.0" encoding="utf-8"?>
7330 <opml version="1.0">
7331 <head>
7332   <title>$site_name OPML Export</title>
7333 </head>
7334 <body>
7335 <outline text="git RSS feeds">
7336 XML
7337
7338         foreach my $pr (@list) {
7339                 my %proj = %$pr;
7340                 my $head = git_get_head_hash($proj{'path'});
7341                 if (!defined $head) {
7342                         next;
7343                 }
7344                 $git_dir = "$projectroot/$proj{'path'}";
7345                 my %co = parse_commit($head);
7346                 if (!%co) {
7347                         next;
7348                 }
7349
7350                 my $path = esc_html(chop_str($proj{'path'}, 25, 5));
7351                 my $rss  = href('project' => $proj{'path'}, 'action' => 'rss', -full => 1);
7352                 my $html = href('project' => $proj{'path'}, 'action' => 'summary', -full => 1);
7353                 print "<outline type=\"rss\" text=\"$path\" title=\"$path\" xmlUrl=\"$rss\" htmlUrl=\"$html\"/>\n";
7354         }
7355         print <<XML;
7356 </outline>
7357 </body>
7358 </opml>
7359 XML
7360 }