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         } else {
3736                 print qq!<script type="text/javascript">\n!.
3737                       qq!window.onload = function () {\n!.
3738                       (gitweb_check_feature('javascript-actions') ?
3739                       qq!       fixLinks();\n! : '').
3740                       # last parameter to onloadTZSetup must be CSS class used by format_timestamp_html
3741                       qq!       var tz_cookie = { name: 'gitweb_tz', expires: 14, path: '/' };\n!. # in days
3742                       qq!       onloadTZSetup('local', tz_cookie, 'datetime');\n!.
3743                       qq!};\n!.
3744                       qq!</script>\n!;
3745         }
3746
3747         print "</body>\n" .
3748               "</html>";
3749 }
3750
3751 # die_error(<http_status_code>, <error_message>[, <detailed_html_description>])
3752 # Example: die_error(404, 'Hash not found')
3753 # By convention, use the following status codes (as defined in RFC 2616):
3754 # 400: Invalid or missing CGI parameters, or
3755 #      requested object exists but has wrong type.
3756 # 403: Requested feature (like "pickaxe" or "snapshot") not enabled on
3757 #      this server or project.
3758 # 404: Requested object/revision/project doesn't exist.
3759 # 500: The server isn't configured properly, or
3760 #      an internal error occurred (e.g. failed assertions caused by bugs), or
3761 #      an unknown error occurred (e.g. the git binary died unexpectedly).
3762 # 503: The server is currently unavailable (because it is overloaded,
3763 #      or down for maintenance).  Generally, this is a temporary state.
3764 sub die_error {
3765         my $status = shift || 500;
3766         my $error = esc_html(shift) || "Internal Server Error";
3767         my $extra = shift;
3768         my %opts = @_;
3769
3770         my %http_responses = (
3771                 400 => '400 Bad Request',
3772                 403 => '403 Forbidden',
3773                 404 => '404 Not Found',
3774                 500 => '500 Internal Server Error',
3775                 503 => '503 Service Unavailable',
3776         );
3777         git_header_html($http_responses{$status}, undef, %opts);
3778         print <<EOF;
3779 <div class="page_body">
3780 <br /><br />
3781 $status - $error
3782 <br />
3783 EOF
3784         if (defined $extra) {
3785                 print "<hr />\n" .
3786                       "$extra\n";
3787         }
3788         print "</div>\n";
3789
3790         git_footer_html();
3791         goto DONE_GITWEB
3792                 unless ($opts{'-error_handler'});
3793 }
3794
3795 ## ----------------------------------------------------------------------
3796 ## functions printing or outputting HTML: navigation
3797
3798 sub git_print_page_nav {
3799         my ($current, $suppress, $head, $treehead, $treebase, $extra) = @_;
3800         $extra = '' if !defined $extra; # pager or formats
3801
3802         my @navs = qw(summary shortlog log commit commitdiff tree);
3803         if ($suppress) {
3804                 @navs = grep { $_ ne $suppress } @navs;
3805         }
3806
3807         my %arg = map { $_ => {action=>$_} } @navs;
3808         if (defined $head) {
3809                 for (qw(commit commitdiff)) {
3810                         $arg{$_}{'hash'} = $head;
3811                 }
3812                 if ($current =~ m/^(tree | log | shortlog | commit | commitdiff | search)$/x) {
3813                         for (qw(shortlog log)) {
3814                                 $arg{$_}{'hash'} = $head;
3815                         }
3816                 }
3817         }
3818
3819         $arg{'tree'}{'hash'} = $treehead if defined $treehead;
3820         $arg{'tree'}{'hash_base'} = $treebase if defined $treebase;
3821
3822         my @actions = gitweb_get_feature('actions');
3823         my %repl = (
3824                 '%' => '%',
3825                 'n' => $project,         # project name
3826                 'f' => $git_dir,         # project path within filesystem
3827                 'h' => $treehead || '',  # current hash ('h' parameter)
3828                 'b' => $treebase || '',  # hash base ('hb' parameter)
3829         );
3830         while (@actions) {
3831                 my ($label, $link, $pos) = splice(@actions,0,3);
3832                 # insert
3833                 @navs = map { $_ eq $pos ? ($_, $label) : $_ } @navs;
3834                 # munch munch
3835                 $link =~ s/%([%nfhb])/$repl{$1}/g;
3836                 $arg{$label}{'_href'} = $link;
3837         }
3838
3839         print "<div class=\"page_nav\">\n" .
3840                 (join " | ",
3841                  map { $_ eq $current ?
3842                        $_ : $cgi->a({-href => ($arg{$_}{_href} ? $arg{$_}{_href} : href(%{$arg{$_}}))}, "$_")
3843                  } @navs);
3844         print "<br/>\n$extra<br/>\n" .
3845               "</div>\n";
3846 }
3847
3848 # returns a submenu for the nagivation of the refs views (tags, heads,
3849 # remotes) with the current view disabled and the remotes view only
3850 # available if the feature is enabled
3851 sub format_ref_views {
3852         my ($current) = @_;
3853         my @ref_views = qw{tags heads};
3854         push @ref_views, 'remotes' if gitweb_check_feature('remote_heads');
3855         return join " | ", map {
3856                 $_ eq $current ? $_ :
3857                 $cgi->a({-href => href(action=>$_)}, $_)
3858         } @ref_views
3859 }
3860
3861 sub format_paging_nav {
3862         my ($action, $page, $has_next_link) = @_;
3863         my $paging_nav;
3864
3865
3866         if ($page > 0) {
3867                 $paging_nav .=
3868                         $cgi->a({-href => href(-replay=>1, page=>undef)}, "first") .
3869                         " &sdot; " .
3870                         $cgi->a({-href => href(-replay=>1, page=>$page-1),
3871                                  -accesskey => "p", -title => "Alt-p"}, "prev");
3872         } else {
3873                 $paging_nav .= "first &sdot; prev";
3874         }
3875
3876         if ($has_next_link) {
3877                 $paging_nav .= " &sdot; " .
3878                         $cgi->a({-href => href(-replay=>1, page=>$page+1),
3879                                  -accesskey => "n", -title => "Alt-n"}, "next");
3880         } else {
3881                 $paging_nav .= " &sdot; next";
3882         }
3883
3884         return $paging_nav;
3885 }
3886
3887 ## ......................................................................
3888 ## functions printing or outputting HTML: div
3889
3890 sub git_print_header_div {
3891         my ($action, $title, $hash, $hash_base) = @_;
3892         my %args = ();
3893
3894         $args{'action'} = $action;
3895         $args{'hash'} = $hash if $hash;
3896         $args{'hash_base'} = $hash_base if $hash_base;
3897
3898         print "<div class=\"header\">\n" .
3899               $cgi->a({-href => href(%args), -class => "title"},
3900               $title ? $title : $action) .
3901               "\n</div>\n";
3902 }
3903
3904 sub format_repo_url {
3905         my ($name, $url) = @_;
3906         return "<tr class=\"metadata_url\"><td>$name</td><td>$url</td></tr>\n";
3907 }
3908
3909 # Group output by placing it in a DIV element and adding a header.
3910 # Options for start_div() can be provided by passing a hash reference as the
3911 # first parameter to the function.
3912 # Options to git_print_header_div() can be provided by passing an array
3913 # reference. This must follow the options to start_div if they are present.
3914 # The content can be a scalar, which is output as-is, a scalar reference, which
3915 # is output after html escaping, an IO handle passed either as *handle or
3916 # *handle{IO}, or a function reference. In the latter case all following
3917 # parameters will be taken as argument to the content function call.
3918 sub git_print_section {
3919         my ($div_args, $header_args, $content);
3920         my $arg = shift;
3921         if (ref($arg) eq 'HASH') {
3922                 $div_args = $arg;
3923                 $arg = shift;
3924         }
3925         if (ref($arg) eq 'ARRAY') {
3926                 $header_args = $arg;
3927                 $arg = shift;
3928         }
3929         $content = $arg;
3930
3931         print $cgi->start_div($div_args);
3932         git_print_header_div(@$header_args);
3933
3934         if (ref($content) eq 'CODE') {
3935                 $content->(@_);
3936         } elsif (ref($content) eq 'SCALAR') {
3937                 print esc_html($$content);
3938         } elsif (ref($content) eq 'GLOB' or ref($content) eq 'IO::Handle') {
3939                 print <$content>;
3940         } elsif (!ref($content) && defined($content)) {
3941                 print $content;
3942         }
3943
3944         print $cgi->end_div;
3945 }
3946
3947 sub format_timestamp_html {
3948         my $date = shift;
3949         my $strtime = '<span class="datetime">'.$date->{'rfc2822'}.'</span>';
3950
3951         my $localtime_format = '(%02d:%02d %s)';
3952         if ($date->{'hour_local'} < 6) {
3953                 $localtime_format = '(<span class="atnight">%02d:%02d</span> %s)';
3954         }
3955         $strtime .= ' ' .
3956                     sprintf($localtime_format,
3957                             $date->{'hour_local'}, $date->{'minute_local'}, $date->{'tz_local'});
3958
3959         return $strtime;
3960 }
3961
3962 # Outputs the author name and date in long form
3963 sub git_print_authorship {
3964         my $co = shift;
3965         my %opts = @_;
3966         my $tag = $opts{-tag} || 'div';
3967         my $author = $co->{'author_name'};
3968
3969         my %ad = parse_date($co->{'author_epoch'}, $co->{'author_tz'});
3970         print "<$tag class=\"author_date\">" .
3971               format_search_author($author, "author", esc_html($author)) .
3972               " [".format_timestamp_html(\%ad)."]".
3973               git_get_avatar($co->{'author_email'}, -pad_before => 1) .
3974               "</$tag>\n";
3975 }
3976
3977 # Outputs table rows containing the full author or committer information,
3978 # in the format expected for 'commit' view (& similar).
3979 # Parameters are a commit hash reference, followed by the list of people
3980 # to output information for. If the list is empty it defaults to both
3981 # author and committer.
3982 sub git_print_authorship_rows {
3983         my $co = shift;
3984         # too bad we can't use @people = @_ || ('author', 'committer')
3985         my @people = @_;
3986         @people = ('author', 'committer') unless @people;
3987         foreach my $who (@people) {
3988                 my %wd = parse_date($co->{"${who}_epoch"}, $co->{"${who}_tz"});
3989                 print "<tr><td>$who</td><td>" .
3990                       format_search_author($co->{"${who}_name"}, $who,
3991                                            esc_html($co->{"${who}_name"})) . " " .
3992                       format_search_author($co->{"${who}_email"}, $who,
3993                                            esc_html("<" . $co->{"${who}_email"} . ">")) .
3994                       "</td><td rowspan=\"2\">" .
3995                       git_get_avatar($co->{"${who}_email"}, -size => 'double') .
3996                       "</td></tr>\n" .
3997                       "<tr>" .
3998                       "<td></td><td>" .
3999                       format_timestamp_html(\%wd) .
4000                       "</td>" .
4001                       "</tr>\n";
4002         }
4003 }
4004
4005 sub git_print_page_path {
4006         my $name = shift;
4007         my $type = shift;
4008         my $hb = shift;
4009
4010
4011         print "<div class=\"page_path\">";
4012         print $cgi->a({-href => href(action=>"tree", hash_base=>$hb),
4013                       -title => 'tree root'}, to_utf8("[$project]"));
4014         print " / ";
4015         if (defined $name) {
4016                 my @dirname = split '/', $name;
4017                 my $basename = pop @dirname;
4018                 my $fullname = '';
4019
4020                 foreach my $dir (@dirname) {
4021                         $fullname .= ($fullname ? '/' : '') . $dir;
4022                         print $cgi->a({-href => href(action=>"tree", file_name=>$fullname,
4023                                                      hash_base=>$hb),
4024                                       -title => $fullname}, esc_path($dir));
4025                         print " / ";
4026                 }
4027                 if (defined $type && $type eq 'blob') {
4028                         print $cgi->a({-href => href(action=>"blob_plain", file_name=>$file_name,
4029                                                      hash_base=>$hb),
4030                                       -title => $name}, esc_path($basename));
4031                 } elsif (defined $type && $type eq 'tree') {
4032                         print $cgi->a({-href => href(action=>"tree", file_name=>$file_name,
4033                                                      hash_base=>$hb),
4034                                       -title => $name}, esc_path($basename));
4035                         print " / ";
4036                 } else {
4037                         print esc_path($basename);
4038                 }
4039         }
4040         print "<br/></div>\n";
4041 }
4042
4043 sub git_print_log {
4044         my $log = shift;
4045         my %opts = @_;
4046
4047         if ($opts{'-remove_title'}) {
4048                 # remove title, i.e. first line of log
4049                 shift @$log;
4050         }
4051         # remove leading empty lines
4052         while (defined $log->[0] && $log->[0] eq "") {
4053                 shift @$log;
4054         }
4055
4056         # print log
4057         my $signoff = 0;
4058         my $empty = 0;
4059         foreach my $line (@$log) {
4060                 if ($line =~ m/^ *(signed[ \-]off[ \-]by[ :]|acked[ \-]by[ :]|cc[ :])/i) {
4061                         $signoff = 1;
4062                         $empty = 0;
4063                         if (! $opts{'-remove_signoff'}) {
4064                                 print "<span class=\"signoff\">" . esc_html($line) . "</span><br/>\n";
4065                                 next;
4066                         } else {
4067                                 # remove signoff lines
4068                                 next;
4069                         }
4070                 } else {
4071                         $signoff = 0;
4072                 }
4073
4074                 # print only one empty line
4075                 # do not print empty line after signoff
4076                 if ($line eq "") {
4077                         next if ($empty || $signoff);
4078                         $empty = 1;
4079                 } else {
4080                         $empty = 0;
4081                 }
4082
4083                 print format_log_line_html($line) . "<br/>\n";
4084         }
4085
4086         if ($opts{'-final_empty_line'}) {
4087                 # end with single empty line
4088                 print "<br/>\n" unless $empty;
4089         }
4090 }
4091
4092 # return link target (what link points to)
4093 sub git_get_link_target {
4094         my $hash = shift;
4095         my $link_target;
4096
4097         # read link
4098         open my $fd, "-|", git_cmd(), "cat-file", "blob", $hash
4099                 or return;
4100         {
4101                 local $/ = undef;
4102                 $link_target = <$fd>;
4103         }
4104         close $fd
4105                 or return;
4106
4107         return $link_target;
4108 }
4109
4110 # given link target, and the directory (basedir) the link is in,
4111 # return target of link relative to top directory (top tree);
4112 # return undef if it is not possible (including absolute links).
4113 sub normalize_link_target {
4114         my ($link_target, $basedir) = @_;
4115
4116         # absolute symlinks (beginning with '/') cannot be normalized
4117         return if (substr($link_target, 0, 1) eq '/');
4118
4119         # normalize link target to path from top (root) tree (dir)
4120         my $path;
4121         if ($basedir) {
4122                 $path = $basedir . '/' . $link_target;
4123         } else {
4124                 # we are in top (root) tree (dir)
4125                 $path = $link_target;
4126         }
4127
4128         # remove //, /./, and /../
4129         my @path_parts;
4130         foreach my $part (split('/', $path)) {
4131                 # discard '.' and ''
4132                 next if (!$part || $part eq '.');
4133                 # handle '..'
4134                 if ($part eq '..') {
4135                         if (@path_parts) {
4136                                 pop @path_parts;
4137                         } else {
4138                                 # link leads outside repository (outside top dir)
4139                                 return;
4140                         }
4141                 } else {
4142                         push @path_parts, $part;
4143                 }
4144         }
4145         $path = join('/', @path_parts);
4146
4147         return $path;
4148 }
4149
4150 # print tree entry (row of git_tree), but without encompassing <tr> element
4151 sub git_print_tree_entry {
4152         my ($t, $basedir, $hash_base, $have_blame) = @_;
4153
4154         my %base_key = ();
4155         $base_key{'hash_base'} = $hash_base if defined $hash_base;
4156
4157         # The format of a table row is: mode list link.  Where mode is
4158         # the mode of the entry, list is the name of the entry, an href,
4159         # and link is the action links of the entry.
4160
4161         print "<td class=\"mode\">" . mode_str($t->{'mode'}) . "</td>\n";
4162         if (exists $t->{'size'}) {
4163                 print "<td class=\"size\">$t->{'size'}</td>\n";
4164         }
4165         if ($t->{'type'} eq "blob") {
4166                 print "<td class=\"list\">" .
4167                         $cgi->a({-href => href(action=>"blob", hash=>$t->{'hash'},
4168                                                file_name=>"$basedir$t->{'name'}", %base_key),
4169                                 -class => "list"}, esc_path($t->{'name'}));
4170                 if (S_ISLNK(oct $t->{'mode'})) {
4171                         my $link_target = git_get_link_target($t->{'hash'});
4172                         if ($link_target) {
4173                                 my $norm_target = normalize_link_target($link_target, $basedir);
4174                                 if (defined $norm_target) {
4175                                         print " -> " .
4176                                               $cgi->a({-href => href(action=>"object", hash_base=>$hash_base,
4177                                                                      file_name=>$norm_target),
4178                                                        -title => $norm_target}, esc_path($link_target));
4179                                 } else {
4180                                         print " -> " . esc_path($link_target);
4181                                 }
4182                         }
4183                 }
4184                 print "</td>\n";
4185                 print "<td class=\"link\">";
4186                 print $cgi->a({-href => href(action=>"blob", hash=>$t->{'hash'},
4187                                              file_name=>"$basedir$t->{'name'}", %base_key)},
4188                               "blob");
4189                 if ($have_blame) {
4190                         print " | " .
4191                               $cgi->a({-href => href(action=>"blame", hash=>$t->{'hash'},
4192                                                      file_name=>"$basedir$t->{'name'}", %base_key)},
4193                                       "blame");
4194                 }
4195                 if (defined $hash_base) {
4196                         print " | " .
4197                               $cgi->a({-href => href(action=>"history", hash_base=>$hash_base,
4198                                                      hash=>$t->{'hash'}, file_name=>"$basedir$t->{'name'}")},
4199                                       "history");
4200                 }
4201                 print " | " .
4202                         $cgi->a({-href => href(action=>"blob_plain", hash_base=>$hash_base,
4203                                                file_name=>"$basedir$t->{'name'}")},
4204                                 "raw");
4205                 print "</td>\n";
4206
4207         } elsif ($t->{'type'} eq "tree") {
4208                 print "<td class=\"list\">";
4209                 print $cgi->a({-href => href(action=>"tree", hash=>$t->{'hash'},
4210                                              file_name=>"$basedir$t->{'name'}",
4211                                              %base_key)},
4212                               esc_path($t->{'name'}));
4213                 print "</td>\n";
4214                 print "<td class=\"link\">";
4215                 print $cgi->a({-href => href(action=>"tree", hash=>$t->{'hash'},
4216                                              file_name=>"$basedir$t->{'name'}",
4217                                              %base_key)},
4218                               "tree");
4219                 if (defined $hash_base) {
4220                         print " | " .
4221                               $cgi->a({-href => href(action=>"history", hash_base=>$hash_base,
4222                                                      file_name=>"$basedir$t->{'name'}")},
4223                                       "history");
4224                 }
4225                 print "</td>\n";
4226         } else {
4227                 # unknown object: we can only present history for it
4228                 # (this includes 'commit' object, i.e. submodule support)
4229                 print "<td class=\"list\">" .
4230                       esc_path($t->{'name'}) .
4231                       "</td>\n";
4232                 print "<td class=\"link\">";
4233                 if (defined $hash_base) {
4234                         print $cgi->a({-href => href(action=>"history",
4235                                                      hash_base=>$hash_base,
4236                                                      file_name=>"$basedir$t->{'name'}")},
4237                                       "history");
4238                 }
4239                 print "</td>\n";
4240         }
4241 }
4242
4243 ## ......................................................................
4244 ## functions printing large fragments of HTML
4245
4246 # get pre-image filenames for merge (combined) diff
4247 sub fill_from_file_info {
4248         my ($diff, @parents) = @_;
4249
4250         $diff->{'from_file'} = [ ];
4251         $diff->{'from_file'}[$diff->{'nparents'} - 1] = undef;
4252         for (my $i = 0; $i < $diff->{'nparents'}; $i++) {
4253                 if ($diff->{'status'}[$i] eq 'R' ||
4254                     $diff->{'status'}[$i] eq 'C') {
4255                         $diff->{'from_file'}[$i] =
4256                                 git_get_path_by_hash($parents[$i], $diff->{'from_id'}[$i]);
4257                 }
4258         }
4259
4260         return $diff;
4261 }
4262
4263 # is current raw difftree line of file deletion
4264 sub is_deleted {
4265         my $diffinfo = shift;
4266
4267         return $diffinfo->{'to_id'} eq ('0' x 40);
4268 }
4269
4270 # does patch correspond to [previous] difftree raw line
4271 # $diffinfo  - hashref of parsed raw diff format
4272 # $patchinfo - hashref of parsed patch diff format
4273 #              (the same keys as in $diffinfo)
4274 sub is_patch_split {
4275         my ($diffinfo, $patchinfo) = @_;
4276
4277         return defined $diffinfo && defined $patchinfo
4278                 && $diffinfo->{'to_file'} eq $patchinfo->{'to_file'};
4279 }
4280
4281
4282 sub git_difftree_body {
4283         my ($difftree, $hash, @parents) = @_;
4284         my ($parent) = $parents[0];
4285         my $have_blame = gitweb_check_feature('blame');
4286         print "<div class=\"list_head\">\n";
4287         if ($#{$difftree} > 10) {
4288                 print(($#{$difftree} + 1) . " files changed:\n");
4289         }
4290         print "</div>\n";
4291
4292         print "<table class=\"" .
4293               (@parents > 1 ? "combined " : "") .
4294               "diff_tree\">\n";
4295
4296         # header only for combined diff in 'commitdiff' view
4297         my $has_header = @$difftree && @parents > 1 && $action eq 'commitdiff';
4298         if ($has_header) {
4299                 # table header
4300                 print "<thead><tr>\n" .
4301                        "<th></th><th></th>\n"; # filename, patchN link
4302                 for (my $i = 0; $i < @parents; $i++) {
4303                         my $par = $parents[$i];
4304                         print "<th>" .
4305                               $cgi->a({-href => href(action=>"commitdiff",
4306                                                      hash=>$hash, hash_parent=>$par),
4307                                        -title => 'commitdiff to parent number ' .
4308                                                   ($i+1) . ': ' . substr($par,0,7)},
4309                                       $i+1) .
4310                               "&nbsp;</th>\n";
4311                 }
4312                 print "</tr></thead>\n<tbody>\n";
4313         }
4314
4315         my $alternate = 1;
4316         my $patchno = 0;
4317         foreach my $line (@{$difftree}) {
4318                 my $diff = parsed_difftree_line($line);
4319
4320                 if ($alternate) {
4321                         print "<tr class=\"dark\">\n";
4322                 } else {
4323                         print "<tr class=\"light\">\n";
4324                 }
4325                 $alternate ^= 1;
4326
4327                 if (exists $diff->{'nparents'}) { # combined diff
4328
4329                         fill_from_file_info($diff, @parents)
4330                                 unless exists $diff->{'from_file'};
4331
4332                         if (!is_deleted($diff)) {
4333                                 # file exists in the result (child) commit
4334                                 print "<td>" .
4335                                       $cgi->a({-href => href(action=>"blob", hash=>$diff->{'to_id'},
4336                                                              file_name=>$diff->{'to_file'},
4337                                                              hash_base=>$hash),
4338                                               -class => "list"}, esc_path($diff->{'to_file'})) .
4339                                       "</td>\n";
4340                         } else {
4341                                 print "<td>" .
4342                                       esc_path($diff->{'to_file'}) .
4343                                       "</td>\n";
4344                         }
4345
4346                         if ($action eq 'commitdiff') {
4347                                 # link to patch
4348                                 $patchno++;
4349                                 print "<td class=\"link\">" .
4350                                       $cgi->a({-href => href(-anchor=>"patch$patchno")},
4351                                               "patch") .
4352                                       " | " .
4353                                       "</td>\n";
4354                         }
4355
4356                         my $has_history = 0;
4357                         my $not_deleted = 0;
4358                         for (my $i = 0; $i < $diff->{'nparents'}; $i++) {
4359                                 my $hash_parent = $parents[$i];
4360                                 my $from_hash = $diff->{'from_id'}[$i];
4361                                 my $from_path = $diff->{'from_file'}[$i];
4362                                 my $status = $diff->{'status'}[$i];
4363
4364                                 $has_history ||= ($status ne 'A');
4365                                 $not_deleted ||= ($status ne 'D');
4366
4367                                 if ($status eq 'A') {
4368                                         print "<td  class=\"link\" align=\"right\"> | </td>\n";
4369                                 } elsif ($status eq 'D') {
4370                                         print "<td class=\"link\">" .
4371                                               $cgi->a({-href => href(action=>"blob",
4372                                                                      hash_base=>$hash,
4373                                                                      hash=>$from_hash,
4374                                                                      file_name=>$from_path)},
4375                                                       "blob" . ($i+1)) .
4376                                               " | </td>\n";
4377                                 } else {
4378                                         if ($diff->{'to_id'} eq $from_hash) {
4379                                                 print "<td class=\"link nochange\">";
4380                                         } else {
4381                                                 print "<td class=\"link\">";
4382                                         }
4383                                         print $cgi->a({-href => href(action=>"blobdiff",
4384                                                                      hash=>$diff->{'to_id'},
4385                                                                      hash_parent=>$from_hash,
4386                                                                      hash_base=>$hash,
4387                                                                      hash_parent_base=>$hash_parent,
4388                                                                      file_name=>$diff->{'to_file'},
4389                                                                      file_parent=>$from_path)},
4390                                                       "diff" . ($i+1)) .
4391                                               " | </td>\n";
4392                                 }
4393                         }
4394
4395                         print "<td class=\"link\">";
4396                         if ($not_deleted) {
4397                                 print $cgi->a({-href => href(action=>"blob",
4398                                                              hash=>$diff->{'to_id'},
4399                                                              file_name=>$diff->{'to_file'},
4400                                                              hash_base=>$hash)},
4401                                               "blob");
4402                                 print " | " if ($has_history);
4403                         }
4404                         if ($has_history) {
4405                                 print $cgi->a({-href => href(action=>"history",
4406                                                              file_name=>$diff->{'to_file'},
4407                                                              hash_base=>$hash)},
4408                                               "history");
4409                         }
4410                         print "</td>\n";
4411
4412                         print "</tr>\n";
4413                         next; # instead of 'else' clause, to avoid extra indent
4414                 }
4415                 # else ordinary diff
4416
4417                 my ($to_mode_oct, $to_mode_str, $to_file_type);
4418                 my ($from_mode_oct, $from_mode_str, $from_file_type);
4419                 if ($diff->{'to_mode'} ne ('0' x 6)) {
4420                         $to_mode_oct = oct $diff->{'to_mode'};
4421                         if (S_ISREG($to_mode_oct)) { # only for regular file
4422                                 $to_mode_str = sprintf("%04o", $to_mode_oct & 0777); # permission bits
4423                         }
4424                         $to_file_type = file_type($diff->{'to_mode'});
4425                 }
4426                 if ($diff->{'from_mode'} ne ('0' x 6)) {
4427                         $from_mode_oct = oct $diff->{'from_mode'};
4428                         if (S_ISREG($from_mode_oct)) { # only for regular file
4429                                 $from_mode_str = sprintf("%04o", $from_mode_oct & 0777); # permission bits
4430                         }
4431                         $from_file_type = file_type($diff->{'from_mode'});
4432                 }
4433
4434                 if ($diff->{'status'} eq "A") { # created
4435                         my $mode_chng = "<span class=\"file_status new\">[new $to_file_type";
4436                         $mode_chng   .= " with mode: $to_mode_str" if $to_mode_str;
4437                         $mode_chng   .= "]</span>";
4438                         print "<td>";
4439                         print $cgi->a({-href => href(action=>"blob", hash=>$diff->{'to_id'},
4440                                                      hash_base=>$hash, file_name=>$diff->{'file'}),
4441                                       -class => "list"}, esc_path($diff->{'file'}));
4442                         print "</td>\n";
4443                         print "<td>$mode_chng</td>\n";
4444                         print "<td class=\"link\">";
4445                         if ($action eq 'commitdiff') {
4446                                 # link to patch
4447                                 $patchno++;
4448                                 print $cgi->a({-href => href(-anchor=>"patch$patchno")},
4449                                               "patch") .
4450                                       " | ";
4451                         }
4452                         print $cgi->a({-href => href(action=>"blob", hash=>$diff->{'to_id'},
4453                                                      hash_base=>$hash, file_name=>$diff->{'file'})},
4454                                       "blob");
4455                         print "</td>\n";
4456
4457                 } elsif ($diff->{'status'} eq "D") { # deleted
4458                         my $mode_chng = "<span class=\"file_status deleted\">[deleted $from_file_type]</span>";
4459                         print "<td>";
4460                         print $cgi->a({-href => href(action=>"blob", hash=>$diff->{'from_id'},
4461                                                      hash_base=>$parent, file_name=>$diff->{'file'}),
4462                                        -class => "list"}, esc_path($diff->{'file'}));
4463                         print "</td>\n";
4464                         print "<td>$mode_chng</td>\n";
4465                         print "<td class=\"link\">";
4466                         if ($action eq 'commitdiff') {
4467                                 # link to patch
4468                                 $patchno++;
4469                                 print $cgi->a({-href => href(-anchor=>"patch$patchno")},
4470                                               "patch") .
4471                                       " | ";
4472                         }
4473                         print $cgi->a({-href => href(action=>"blob", hash=>$diff->{'from_id'},
4474                                                      hash_base=>$parent, file_name=>$diff->{'file'})},
4475                                       "blob") . " | ";
4476                         if ($have_blame) {
4477                                 print $cgi->a({-href => href(action=>"blame", hash_base=>$parent,
4478                                                              file_name=>$diff->{'file'})},
4479                                               "blame") . " | ";
4480                         }
4481                         print $cgi->a({-href => href(action=>"history", hash_base=>$parent,
4482                                                      file_name=>$diff->{'file'})},
4483                                       "history");
4484                         print "</td>\n";
4485
4486                 } elsif ($diff->{'status'} eq "M" || $diff->{'status'} eq "T") { # modified, or type changed
4487                         my $mode_chnge = "";
4488                         if ($diff->{'from_mode'} != $diff->{'to_mode'}) {
4489                                 $mode_chnge = "<span class=\"file_status mode_chnge\">[changed";
4490                                 if ($from_file_type ne $to_file_type) {
4491                                         $mode_chnge .= " from $from_file_type to $to_file_type";
4492                                 }
4493                                 if (($from_mode_oct & 0777) != ($to_mode_oct & 0777)) {
4494                                         if ($from_mode_str && $to_mode_str) {
4495                                                 $mode_chnge .= " mode: $from_mode_str->$to_mode_str";
4496                                         } elsif ($to_mode_str) {
4497                                                 $mode_chnge .= " mode: $to_mode_str";
4498                                         }
4499                                 }
4500                                 $mode_chnge .= "]</span>\n";
4501                         }
4502                         print "<td>";
4503                         print $cgi->a({-href => href(action=>"blob", hash=>$diff->{'to_id'},
4504                                                      hash_base=>$hash, file_name=>$diff->{'file'}),
4505                                       -class => "list"}, esc_path($diff->{'file'}));
4506                         print "</td>\n";
4507                         print "<td>$mode_chnge</td>\n";
4508                         print "<td class=\"link\">";
4509                         if ($action eq 'commitdiff') {
4510                                 # link to patch
4511                                 $patchno++;
4512                                 print $cgi->a({-href => href(-anchor=>"patch$patchno")},
4513                                               "patch") .
4514                                       " | ";
4515                         } elsif ($diff->{'to_id'} ne $diff->{'from_id'}) {
4516                                 # "commit" view and modified file (not onlu mode changed)
4517                                 print $cgi->a({-href => href(action=>"blobdiff",
4518                                                              hash=>$diff->{'to_id'}, hash_parent=>$diff->{'from_id'},
4519                                                              hash_base=>$hash, hash_parent_base=>$parent,
4520                                                              file_name=>$diff->{'file'})},
4521                                               "diff") .
4522                                       " | ";
4523                         }
4524                         print $cgi->a({-href => href(action=>"blob", hash=>$diff->{'to_id'},
4525                                                      hash_base=>$hash, file_name=>$diff->{'file'})},
4526                                        "blob") . " | ";
4527                         if ($have_blame) {
4528                                 print $cgi->a({-href => href(action=>"blame", hash_base=>$hash,
4529                                                              file_name=>$diff->{'file'})},
4530                                               "blame") . " | ";
4531                         }
4532                         print $cgi->a({-href => href(action=>"history", hash_base=>$hash,
4533                                                      file_name=>$diff->{'file'})},
4534                                       "history");
4535                         print "</td>\n";
4536
4537                 } elsif ($diff->{'status'} eq "R" || $diff->{'status'} eq "C") { # renamed or copied
4538                         my %status_name = ('R' => 'moved', 'C' => 'copied');
4539                         my $nstatus = $status_name{$diff->{'status'}};
4540                         my $mode_chng = "";
4541                         if ($diff->{'from_mode'} != $diff->{'to_mode'}) {
4542                                 # mode also for directories, so we cannot use $to_mode_str
4543                                 $mode_chng = sprintf(", mode: %04o", $to_mode_oct & 0777);
4544                         }
4545                         print "<td>" .
4546                               $cgi->a({-href => href(action=>"blob", hash_base=>$hash,
4547                                                      hash=>$diff->{'to_id'}, file_name=>$diff->{'to_file'}),
4548                                       -class => "list"}, esc_path($diff->{'to_file'})) . "</td>\n" .
4549                               "<td><span class=\"file_status $nstatus\">[$nstatus from " .
4550                               $cgi->a({-href => href(action=>"blob", hash_base=>$parent,
4551                                                      hash=>$diff->{'from_id'}, file_name=>$diff->{'from_file'}),
4552                                       -class => "list"}, esc_path($diff->{'from_file'})) .
4553                               " with " . (int $diff->{'similarity'}) . "% similarity$mode_chng]</span></td>\n" .
4554                               "<td class=\"link\">";
4555                         if ($action eq 'commitdiff') {
4556                                 # link to patch
4557                                 $patchno++;
4558                                 print $cgi->a({-href => href(-anchor=>"patch$patchno")},
4559                                               "patch") .
4560                                       " | ";
4561                         } elsif ($diff->{'to_id'} ne $diff->{'from_id'}) {
4562                                 # "commit" view and modified file (not only pure rename or copy)
4563                                 print $cgi->a({-href => href(action=>"blobdiff",
4564                                                              hash=>$diff->{'to_id'}, hash_parent=>$diff->{'from_id'},
4565                                                              hash_base=>$hash, hash_parent_base=>$parent,
4566                                                              file_name=>$diff->{'to_file'}, file_parent=>$diff->{'from_file'})},
4567                                               "diff") .
4568                                       " | ";
4569                         }
4570                         print $cgi->a({-href => href(action=>"blob", hash=>$diff->{'to_id'},
4571                                                      hash_base=>$parent, file_name=>$diff->{'to_file'})},
4572                                       "blob") . " | ";
4573                         if ($have_blame) {
4574                                 print $cgi->a({-href => href(action=>"blame", hash_base=>$hash,
4575                                                              file_name=>$diff->{'to_file'})},
4576                                               "blame") . " | ";
4577                         }
4578                         print $cgi->a({-href => href(action=>"history", hash_base=>$hash,
4579                                                     file_name=>$diff->{'to_file'})},
4580                                       "history");
4581                         print "</td>\n";
4582
4583                 } # we should not encounter Unmerged (U) or Unknown (X) status
4584                 print "</tr>\n";
4585         }
4586         print "</tbody>" if $has_header;
4587         print "</table>\n";
4588 }
4589
4590 sub git_patchset_body {
4591         my ($fd, $difftree, $hash, @hash_parents) = @_;
4592         my ($hash_parent) = $hash_parents[0];
4593
4594         my $is_combined = (@hash_parents > 1);
4595         my $patch_idx = 0;
4596         my $patch_number = 0;
4597         my $patch_line;
4598         my $diffinfo;
4599         my $to_name;
4600         my (%from, %to);
4601
4602         print "<div class=\"patchset\">\n";
4603
4604         # skip to first patch
4605         while ($patch_line = <$fd>) {
4606                 chomp $patch_line;
4607
4608                 last if ($patch_line =~ m/^diff /);
4609         }
4610
4611  PATCH:
4612         while ($patch_line) {
4613
4614                 # parse "git diff" header line
4615                 if ($patch_line =~ m/^diff --git (\"(?:[^\\\"]*(?:\\.[^\\\"]*)*)\"|[^ "]*) (.*)$/) {
4616                         # $1 is from_name, which we do not use
4617                         $to_name = unquote($2);
4618                         $to_name =~ s!^b/!!;
4619                 } elsif ($patch_line =~ m/^diff --(cc|combined) ("?.*"?)$/) {
4620                         # $1 is 'cc' or 'combined', which we do not use
4621                         $to_name = unquote($2);
4622                 } else {
4623                         $to_name = undef;
4624                 }
4625
4626                 # check if current patch belong to current raw line
4627                 # and parse raw git-diff line if needed
4628                 if (is_patch_split($diffinfo, { 'to_file' => $to_name })) {
4629                         # this is continuation of a split patch
4630                         print "<div class=\"patch cont\">\n";
4631                 } else {
4632                         # advance raw git-diff output if needed
4633                         $patch_idx++ if defined $diffinfo;
4634
4635                         # read and prepare patch information
4636                         $diffinfo = parsed_difftree_line($difftree->[$patch_idx]);
4637
4638                         # compact combined diff output can have some patches skipped
4639                         # find which patch (using pathname of result) we are at now;
4640                         if ($is_combined) {
4641                                 while ($to_name ne $diffinfo->{'to_file'}) {
4642                                         print "<div class=\"patch\" id=\"patch". ($patch_idx+1) ."\">\n" .
4643                                               format_diff_cc_simplified($diffinfo, @hash_parents) .
4644                                               "</div>\n";  # class="patch"
4645
4646                                         $patch_idx++;
4647                                         $patch_number++;
4648
4649                                         last if $patch_idx > $#$difftree;
4650                                         $diffinfo = parsed_difftree_line($difftree->[$patch_idx]);
4651                                 }
4652                         }
4653
4654                         # modifies %from, %to hashes
4655                         parse_from_to_diffinfo($diffinfo, \%from, \%to, @hash_parents);
4656
4657                         # this is first patch for raw difftree line with $patch_idx index
4658                         # we index @$difftree array from 0, but number patches from 1
4659                         print "<div class=\"patch\" id=\"patch". ($patch_idx+1) ."\">\n";
4660                 }
4661
4662                 # git diff header
4663                 #assert($patch_line =~ m/^diff /) if DEBUG;
4664                 #assert($patch_line !~ m!$/$!) if DEBUG; # is chomp-ed
4665                 $patch_number++;
4666                 # print "git diff" header
4667                 print format_git_diff_header_line($patch_line, $diffinfo,
4668                                                   \%from, \%to);
4669
4670                 # print extended diff header
4671                 print "<div class=\"diff extended_header\">\n";
4672         EXTENDED_HEADER:
4673                 while ($patch_line = <$fd>) {
4674                         chomp $patch_line;
4675
4676                         last EXTENDED_HEADER if ($patch_line =~ m/^--- |^diff /);
4677
4678                         print format_extended_diff_header_line($patch_line, $diffinfo,
4679                                                                \%from, \%to);
4680                 }
4681                 print "</div>\n"; # class="diff extended_header"
4682
4683                 # from-file/to-file diff header
4684                 if (! $patch_line) {
4685                         print "</div>\n"; # class="patch"
4686                         last PATCH;
4687                 }
4688                 next PATCH if ($patch_line =~ m/^diff /);
4689                 #assert($patch_line =~ m/^---/) if DEBUG;
4690
4691                 my $last_patch_line = $patch_line;
4692                 $patch_line = <$fd>;
4693                 chomp $patch_line;
4694                 #assert($patch_line =~ m/^\+\+\+/) if DEBUG;
4695
4696                 print format_diff_from_to_header($last_patch_line, $patch_line,
4697                                                  $diffinfo, \%from, \%to,
4698                                                  @hash_parents);
4699
4700                 # the patch itself
4701         LINE:
4702                 while ($patch_line = <$fd>) {
4703                         chomp $patch_line;
4704
4705                         next PATCH if ($patch_line =~ m/^diff /);
4706
4707                         print format_diff_line($patch_line, \%from, \%to);
4708                 }
4709
4710         } continue {
4711                 print "</div>\n"; # class="patch"
4712         }
4713
4714         # for compact combined (--cc) format, with chunk and patch simplification
4715         # the patchset might be empty, but there might be unprocessed raw lines
4716         for (++$patch_idx if $patch_number > 0;
4717              $patch_idx < @$difftree;
4718              ++$patch_idx) {
4719                 # read and prepare patch information
4720                 $diffinfo = parsed_difftree_line($difftree->[$patch_idx]);
4721
4722                 # generate anchor for "patch" links in difftree / whatchanged part
4723                 print "<div class=\"patch\" id=\"patch". ($patch_idx+1) ."\">\n" .
4724                       format_diff_cc_simplified($diffinfo, @hash_parents) .
4725                       "</div>\n";  # class="patch"
4726
4727                 $patch_number++;
4728         }
4729
4730         if ($patch_number == 0) {
4731                 if (@hash_parents > 1) {
4732                         print "<div class=\"diff nodifferences\">Trivial merge</div>\n";
4733                 } else {
4734                         print "<div class=\"diff nodifferences\">No differences found</div>\n";
4735                 }
4736         }
4737
4738         print "</div>\n"; # class="patchset"
4739 }
4740
4741 # . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
4742
4743 # fills project list info (age, description, owner, forks) for each
4744 # project in the list, removing invalid projects from returned list
4745 # NOTE: modifies $projlist, but does not remove entries from it
4746 sub fill_project_list_info {
4747         my ($projlist, $check_forks) = @_;
4748         my @projects;
4749
4750         my $show_ctags = gitweb_check_feature('ctags');
4751  PROJECT:
4752         foreach my $pr (@$projlist) {
4753                 my (@activity) = git_get_last_activity($pr->{'path'});
4754                 unless (@activity) {
4755                         next PROJECT;
4756                 }
4757                 ($pr->{'age'}, $pr->{'age_string'}) = @activity;
4758                 if (!defined $pr->{'descr'}) {
4759                         my $descr = git_get_project_description($pr->{'path'}) || "";
4760                         $descr = to_utf8($descr);
4761                         $pr->{'descr_long'} = $descr;
4762                         $pr->{'descr'} = chop_str($descr, $projects_list_description_width, 5);
4763                 }
4764                 if (!defined $pr->{'owner'}) {
4765                         $pr->{'owner'} = git_get_project_owner("$pr->{'path'}") || "";
4766                 }
4767                 if ($check_forks) {
4768                         my $pname = $pr->{'path'};
4769                         if (($pname =~ s/\.git$//) &&
4770                             ($pname !~ /\/$/) &&
4771                             (-d "$projectroot/$pname")) {
4772                                 $pr->{'forks'} = "-d $projectroot/$pname";
4773                         } else {
4774                                 $pr->{'forks'} = 0;
4775                         }
4776                 }
4777                 $show_ctags and $pr->{'ctags'} = git_get_project_ctags($pr->{'path'});
4778                 push @projects, $pr;
4779         }
4780
4781         return @projects;
4782 }
4783
4784 # print 'sort by' <th> element, generating 'sort by $name' replay link
4785 # if that order is not selected
4786 sub print_sort_th {
4787         print format_sort_th(@_);
4788 }
4789
4790 sub format_sort_th {
4791         my ($name, $order, $header) = @_;
4792         my $sort_th = "";
4793         $header ||= ucfirst($name);
4794
4795         if ($order eq $name) {
4796                 $sort_th .= "<th>$header</th>\n";
4797         } else {
4798                 $sort_th .= "<th>" .
4799                             $cgi->a({-href => href(-replay=>1, order=>$name),
4800                                      -class => "header"}, $header) .
4801                             "</th>\n";
4802         }
4803
4804         return $sort_th;
4805 }
4806
4807 sub git_project_list_body {
4808         # actually uses global variable $project
4809         my ($projlist, $order, $from, $to, $extra, $no_header) = @_;
4810
4811         my $check_forks = gitweb_check_feature('forks');
4812         my @projects = fill_project_list_info($projlist, $check_forks);
4813
4814         $order ||= $default_projects_order;
4815         $from = 0 unless defined $from;
4816         $to = $#projects if (!defined $to || $#projects < $to);
4817
4818         my %order_info = (
4819                 project => { key => 'path', type => 'str' },
4820                 descr => { key => 'descr_long', type => 'str' },
4821                 owner => { key => 'owner', type => 'str' },
4822                 age => { key => 'age', type => 'num' }
4823         );
4824         my $oi = $order_info{$order};
4825         if ($oi->{'type'} eq 'str') {
4826                 @projects = sort {$a->{$oi->{'key'}} cmp $b->{$oi->{'key'}}} @projects;
4827         } else {
4828                 @projects = sort {$a->{$oi->{'key'}} <=> $b->{$oi->{'key'}}} @projects;
4829         }
4830
4831         my $show_ctags = gitweb_check_feature('ctags');
4832         if ($show_ctags) {
4833                 my %ctags;
4834                 foreach my $p (@projects) {
4835                         foreach my $ct (keys %{$p->{'ctags'}}) {
4836                                 $ctags{$ct} += $p->{'ctags'}->{$ct};
4837                         }
4838                 }
4839                 my $cloud = git_populate_project_tagcloud(\%ctags);
4840                 print git_show_project_tagcloud($cloud, 64);
4841         }
4842
4843         print "<table class=\"project_list\">\n";
4844         unless ($no_header) {
4845                 print "<tr>\n";
4846                 if ($check_forks) {
4847                         print "<th></th>\n";
4848                 }
4849                 print_sort_th('project', $order, 'Project');
4850                 print_sort_th('descr', $order, 'Description');
4851                 print_sort_th('owner', $order, 'Owner');
4852                 print_sort_th('age', $order, 'Last Change');
4853                 print "<th></th>\n" . # for links
4854                       "</tr>\n";
4855         }
4856         my $alternate = 1;
4857         my $tagfilter = $cgi->param('by_tag');
4858         for (my $i = $from; $i <= $to; $i++) {
4859                 my $pr = $projects[$i];
4860
4861                 next if $tagfilter and $show_ctags and not grep { lc $_ eq lc $tagfilter } keys %{$pr->{'ctags'}};
4862                 next if $searchtext and not $pr->{'path'} =~ /$searchtext/
4863                         and not $pr->{'descr_long'} =~ /$searchtext/;
4864                 # Weed out forks or non-matching entries of search
4865                 if ($check_forks) {
4866                         my $forkbase = $project; $forkbase ||= ''; $forkbase =~ s#\.git$#/#;
4867                         $forkbase="^$forkbase" if $forkbase;
4868                         next if not $searchtext and not $tagfilter and $show_ctags
4869                                 and $pr->{'path'} =~ m#$forkbase.*/.*#; # regexp-safe
4870                 }
4871
4872                 if ($alternate) {
4873                         print "<tr class=\"dark\">\n";
4874                 } else {
4875                         print "<tr class=\"light\">\n";
4876                 }
4877                 $alternate ^= 1;
4878                 if ($check_forks) {
4879                         print "<td>";
4880                         if ($pr->{'forks'}) {
4881                                 print "<!-- $pr->{'forks'} -->\n";
4882                                 print $cgi->a({-href => href(project=>$pr->{'path'}, action=>"forks")}, "+");
4883                         }
4884                         print "</td>\n";
4885                 }
4886                 print "<td>" . $cgi->a({-href => href(project=>$pr->{'path'}, action=>"summary"),
4887                                         -class => "list"}, esc_html($pr->{'path'})) . "</td>\n" .
4888                       "<td>" . $cgi->a({-href => href(project=>$pr->{'path'}, action=>"summary"),
4889                                         -class => "list", -title => $pr->{'descr_long'}},
4890                                         esc_html($pr->{'descr'})) . "</td>\n" .
4891                       "<td><i>" . chop_and_escape_str($pr->{'owner'}, 15) . "</i></td>\n";
4892                 print "<td class=\"". age_class($pr->{'age'}) . "\">" .
4893                       (defined $pr->{'age_string'} ? $pr->{'age_string'} : "No commits") . "</td>\n" .
4894                       "<td class=\"link\">" .
4895                       $cgi->a({-href => href(project=>$pr->{'path'}, action=>"summary")}, "summary")   . " | " .
4896                       $cgi->a({-href => href(project=>$pr->{'path'}, action=>"shortlog")}, "shortlog") . " | " .
4897                       $cgi->a({-href => href(project=>$pr->{'path'}, action=>"log")}, "log") . " | " .
4898                       $cgi->a({-href => href(project=>$pr->{'path'}, action=>"tree")}, "tree") .
4899                       ($pr->{'forks'} ? " | " . $cgi->a({-href => href(project=>$pr->{'path'}, action=>"forks")}, "forks") : '') .
4900                       "</td>\n" .
4901                       "</tr>\n";
4902         }
4903         if (defined $extra) {
4904                 print "<tr>\n";
4905                 if ($check_forks) {
4906                         print "<td></td>\n";
4907                 }
4908                 print "<td colspan=\"5\">$extra</td>\n" .
4909                       "</tr>\n";
4910         }
4911         print "</table>\n";
4912 }
4913
4914 sub git_log_body {
4915         # uses global variable $project
4916         my ($commitlist, $from, $to, $refs, $extra) = @_;
4917
4918         $from = 0 unless defined $from;
4919         $to = $#{$commitlist} if (!defined $to || $#{$commitlist} < $to);
4920
4921         for (my $i = 0; $i <= $to; $i++) {
4922                 my %co = %{$commitlist->[$i]};
4923                 next if !%co;
4924                 my $commit = $co{'id'};
4925                 my $ref = format_ref_marker($refs, $commit);
4926                 git_print_header_div('commit',
4927                                "<span class=\"age\">$co{'age_string'}</span>" .
4928                                esc_html($co{'title'}) . $ref,
4929                                $commit);
4930                 print "<div class=\"title_text\">\n" .
4931                       "<div class=\"log_link\">\n" .
4932                       $cgi->a({-href => href(action=>"commit", hash=>$commit)}, "commit") .
4933                       " | " .
4934                       $cgi->a({-href => href(action=>"commitdiff", hash=>$commit)}, "commitdiff") .
4935                       " | " .
4936                       $cgi->a({-href => href(action=>"tree", hash=>$commit, hash_base=>$commit)}, "tree") .
4937                       "<br/>\n" .
4938                       "</div>\n";
4939                       git_print_authorship(\%co, -tag => 'span');
4940                       print "<br/>\n</div>\n";
4941
4942                 print "<div class=\"log_body\">\n";
4943                 git_print_log($co{'comment'}, -final_empty_line=> 1);
4944                 print "</div>\n";
4945         }
4946         if ($extra) {
4947                 print "<div class=\"page_nav\">\n";
4948                 print "$extra\n";
4949                 print "</div>\n";
4950         }
4951 }
4952
4953 sub git_shortlog_body {
4954         # uses global variable $project
4955         my ($commitlist, $from, $to, $refs, $extra) = @_;
4956
4957         $from = 0 unless defined $from;
4958         $to = $#{$commitlist} if (!defined $to || $#{$commitlist} < $to);
4959
4960         print "<table class=\"shortlog\">\n";
4961         my $alternate = 1;
4962         for (my $i = $from; $i <= $to; $i++) {
4963                 my %co = %{$commitlist->[$i]};
4964                 my $commit = $co{'id'};
4965                 my $ref = format_ref_marker($refs, $commit);
4966                 if ($alternate) {
4967                         print "<tr class=\"dark\">\n";
4968                 } else {
4969                         print "<tr class=\"light\">\n";
4970                 }
4971                 $alternate ^= 1;
4972                 # git_summary() used print "<td><i>$co{'age_string'}</i></td>\n" .
4973                 print "<td title=\"$co{'age_string_age'}\"><i>$co{'age_string_date'}</i></td>\n" .
4974                       format_author_html('td', \%co, 10) . "<td>";
4975                 print format_subject_html($co{'title'}, $co{'title_short'},
4976                                           href(action=>"commit", hash=>$commit), $ref);
4977                 print "</td>\n" .
4978                       "<td class=\"link\">" .
4979                       $cgi->a({-href => href(action=>"commit", hash=>$commit)}, "commit") . " | " .
4980                       $cgi->a({-href => href(action=>"commitdiff", hash=>$commit)}, "commitdiff") . " | " .
4981                       $cgi->a({-href => href(action=>"tree", hash=>$commit, hash_base=>$commit)}, "tree");
4982                 my $snapshot_links = format_snapshot_links($commit);
4983                 if (defined $snapshot_links) {
4984                         print " | " . $snapshot_links;
4985                 }
4986                 print "</td>\n" .
4987                       "</tr>\n";
4988         }
4989         if (defined $extra) {
4990                 print "<tr>\n" .
4991                       "<td colspan=\"4\">$extra</td>\n" .
4992                       "</tr>\n";
4993         }
4994         print "</table>\n";
4995 }
4996
4997 sub git_history_body {
4998         # Warning: assumes constant type (blob or tree) during history
4999         my ($commitlist, $from, $to, $refs, $extra,
5000             $file_name, $file_hash, $ftype) = @_;
5001
5002         $from = 0 unless defined $from;
5003         $to = $#{$commitlist} unless (defined $to && $to <= $#{$commitlist});
5004
5005         print "<table class=\"history\">\n";
5006         my $alternate = 1;
5007         for (my $i = $from; $i <= $to; $i++) {
5008                 my %co = %{$commitlist->[$i]};
5009                 if (!%co) {
5010                         next;
5011                 }
5012                 my $commit = $co{'id'};
5013
5014                 my $ref = format_ref_marker($refs, $commit);
5015
5016                 if ($alternate) {
5017                         print "<tr class=\"dark\">\n";
5018                 } else {
5019                         print "<tr class=\"light\">\n";
5020                 }
5021                 $alternate ^= 1;
5022                 print "<td title=\"$co{'age_string_age'}\"><i>$co{'age_string_date'}</i></td>\n" .
5023         # shortlog:   format_author_html('td', \%co, 10)
5024                       format_author_html('td', \%co, 15, 3) . "<td>";
5025                 # originally git_history used chop_str($co{'title'}, 50)
5026                 print format_subject_html($co{'title'}, $co{'title_short'},
5027                                           href(action=>"commit", hash=>$commit), $ref);
5028                 print "</td>\n" .
5029                       "<td class=\"link\">" .
5030                       $cgi->a({-href => href(action=>$ftype, hash_base=>$commit, file_name=>$file_name)}, $ftype) . " | " .
5031                       $cgi->a({-href => href(action=>"commitdiff", hash=>$commit)}, "commitdiff");
5032
5033                 if ($ftype eq 'blob') {
5034                         my $blob_current = $file_hash;
5035                         my $blob_parent  = git_get_hash_by_path($commit, $file_name);
5036                         if (defined $blob_current && defined $blob_parent &&
5037                                         $blob_current ne $blob_parent) {
5038                                 print " | " .
5039                                         $cgi->a({-href => href(action=>"blobdiff",
5040                                                                hash=>$blob_current, hash_parent=>$blob_parent,
5041                                                                hash_base=>$hash_base, hash_parent_base=>$commit,
5042                                                                file_name=>$file_name)},
5043                                                 "diff to current");
5044                         }
5045                 }
5046                 print "</td>\n" .
5047                       "</tr>\n";
5048         }
5049         if (defined $extra) {
5050                 print "<tr>\n" .
5051                       "<td colspan=\"4\">$extra</td>\n" .
5052                       "</tr>\n";
5053         }
5054         print "</table>\n";
5055 }
5056
5057 sub git_tags_body {
5058         # uses global variable $project
5059         my ($taglist, $from, $to, $extra) = @_;
5060         $from = 0 unless defined $from;
5061         $to = $#{$taglist} if (!defined $to || $#{$taglist} < $to);
5062
5063         print "<table class=\"tags\">\n";
5064         my $alternate = 1;
5065         for (my $i = $from; $i <= $to; $i++) {
5066                 my $entry = $taglist->[$i];
5067                 my %tag = %$entry;
5068                 my $comment = $tag{'subject'};
5069                 my $comment_short;
5070                 if (defined $comment) {
5071                         $comment_short = chop_str($comment, 30, 5);
5072                 }
5073                 if ($alternate) {
5074                         print "<tr class=\"dark\">\n";
5075                 } else {
5076                         print "<tr class=\"light\">\n";
5077                 }
5078                 $alternate ^= 1;
5079                 if (defined $tag{'age'}) {
5080                         print "<td><i>$tag{'age'}</i></td>\n";
5081                 } else {
5082                         print "<td></td>\n";
5083                 }
5084                 print "<td>" .
5085                       $cgi->a({-href => href(action=>$tag{'reftype'}, hash=>$tag{'refid'}),
5086                                -class => "list name"}, esc_html($tag{'name'})) .
5087                       "</td>\n" .
5088                       "<td>";
5089                 if (defined $comment) {
5090                         print format_subject_html($comment, $comment_short,
5091                                                   href(action=>"tag", hash=>$tag{'id'}));
5092                 }
5093                 print "</td>\n" .
5094                       "<td class=\"selflink\">";
5095                 if ($tag{'type'} eq "tag") {
5096                         print $cgi->a({-href => href(action=>"tag", hash=>$tag{'id'})}, "tag");
5097                 } else {
5098                         print "&nbsp;";
5099                 }
5100                 print "</td>\n" .
5101                       "<td class=\"link\">" . " | " .
5102                       $cgi->a({-href => href(action=>$tag{'reftype'}, hash=>$tag{'refid'})}, $tag{'reftype'});
5103                 if ($tag{'reftype'} eq "commit") {
5104                         print " | " . $cgi->a({-href => href(action=>"shortlog", hash=>$tag{'fullname'})}, "shortlog") .
5105                               " | " . $cgi->a({-href => href(action=>"log", hash=>$tag{'fullname'})}, "log");
5106                 } elsif ($tag{'reftype'} eq "blob") {
5107                         print " | " . $cgi->a({-href => href(action=>"blob_plain", hash=>$tag{'refid'})}, "raw");
5108                 }
5109                 print "</td>\n" .
5110                       "</tr>";
5111         }
5112         if (defined $extra) {
5113                 print "<tr>\n" .
5114                       "<td colspan=\"5\">$extra</td>\n" .
5115                       "</tr>\n";
5116         }
5117         print "</table>\n";
5118 }
5119
5120 sub git_heads_body {
5121         # uses global variable $project
5122         my ($headlist, $head, $from, $to, $extra) = @_;
5123         $from = 0 unless defined $from;
5124         $to = $#{$headlist} if (!defined $to || $#{$headlist} < $to);
5125
5126         print "<table class=\"heads\">\n";
5127         my $alternate = 1;
5128         for (my $i = $from; $i <= $to; $i++) {
5129                 my $entry = $headlist->[$i];
5130                 my %ref = %$entry;
5131                 my $curr = $ref{'id'} eq $head;
5132                 if ($alternate) {
5133                         print "<tr class=\"dark\">\n";
5134                 } else {
5135                         print "<tr class=\"light\">\n";
5136                 }
5137                 $alternate ^= 1;
5138                 print "<td><i>$ref{'age'}</i></td>\n" .
5139                       ($curr ? "<td class=\"current_head\">" : "<td>") .
5140                       $cgi->a({-href => href(action=>"shortlog", hash=>$ref{'fullname'}),
5141                                -class => "list name"},esc_html($ref{'name'})) .
5142                       "</td>\n" .
5143                       "<td class=\"link\">" .
5144                       $cgi->a({-href => href(action=>"shortlog", hash=>$ref{'fullname'})}, "shortlog") . " | " .
5145                       $cgi->a({-href => href(action=>"log", hash=>$ref{'fullname'})}, "log") . " | " .
5146                       $cgi->a({-href => href(action=>"tree", hash=>$ref{'fullname'}, hash_base=>$ref{'fullname'})}, "tree") .
5147                       "</td>\n" .
5148                       "</tr>";
5149         }
5150         if (defined $extra) {
5151                 print "<tr>\n" .
5152                       "<td colspan=\"3\">$extra</td>\n" .
5153                       "</tr>\n";
5154         }
5155         print "</table>\n";
5156 }
5157
5158 # Display a single remote block
5159 sub git_remote_block {
5160         my ($remote, $rdata, $limit, $head) = @_;
5161
5162         my $heads = $rdata->{'heads'};
5163         my $fetch = $rdata->{'fetch'};
5164         my $push = $rdata->{'push'};
5165
5166         my $urls_table = "<table class=\"projects_list\">\n" ;
5167
5168         if (defined $fetch) {
5169                 if ($fetch eq $push) {
5170                         $urls_table .= format_repo_url("URL", $fetch);
5171                 } else {
5172                         $urls_table .= format_repo_url("Fetch URL", $fetch);
5173                         $urls_table .= format_repo_url("Push URL", $push) if defined $push;
5174                 }
5175         } elsif (defined $push) {
5176                 $urls_table .= format_repo_url("Push URL", $push);
5177         } else {
5178                 $urls_table .= format_repo_url("", "No remote URL");
5179         }
5180
5181         $urls_table .= "</table>\n";
5182
5183         my $dots;
5184         if (defined $limit && $limit < @$heads) {
5185                 $dots = $cgi->a({-href => href(action=>"remotes", hash=>$remote)}, "...");
5186         }
5187
5188         print $urls_table;
5189         git_heads_body($heads, $head, 0, $limit, $dots);
5190 }
5191
5192 # Display a list of remote names with the respective fetch and push URLs
5193 sub git_remotes_list {
5194         my ($remotedata, $limit) = @_;
5195         print "<table class=\"heads\">\n";
5196         my $alternate = 1;
5197         my @remotes = sort keys %$remotedata;
5198
5199         my $limited = $limit && $limit < @remotes;
5200
5201         $#remotes = $limit - 1 if $limited;
5202
5203         while (my $remote = shift @remotes) {
5204                 my $rdata = $remotedata->{$remote};
5205                 my $fetch = $rdata->{'fetch'};
5206                 my $push = $rdata->{'push'};
5207                 if ($alternate) {
5208                         print "<tr class=\"dark\">\n";
5209                 } else {
5210                         print "<tr class=\"light\">\n";
5211                 }
5212                 $alternate ^= 1;
5213                 print "<td>" .
5214                       $cgi->a({-href=> href(action=>'remotes', hash=>$remote),
5215                                -class=> "list name"},esc_html($remote)) .
5216                       "</td>";
5217                 print "<td class=\"link\">" .
5218                       (defined $fetch ? $cgi->a({-href=> $fetch}, "fetch") : "fetch") .
5219                       " | " .
5220                       (defined $push ? $cgi->a({-href=> $push}, "push") : "push") .
5221                       "</td>";
5222
5223                 print "</tr>\n";
5224         }
5225
5226         if ($limited) {
5227                 print "<tr>\n" .
5228                       "<td colspan=\"3\">" .
5229                       $cgi->a({-href => href(action=>"remotes")}, "...") .
5230                       "</td>\n" . "</tr>\n";
5231         }
5232
5233         print "</table>";
5234 }
5235
5236 # Display remote heads grouped by remote, unless there are too many
5237 # remotes, in which case we only display the remote names
5238 sub git_remotes_body {
5239         my ($remotedata, $limit, $head) = @_;
5240         if ($limit and $limit < keys %$remotedata) {
5241                 git_remotes_list($remotedata, $limit);
5242         } else {
5243                 fill_remote_heads($remotedata);
5244                 while (my ($remote, $rdata) = each %$remotedata) {
5245                         git_print_section({-class=>"remote", -id=>$remote},
5246                                 ["remotes", $remote, $remote], sub {
5247                                         git_remote_block($remote, $rdata, $limit, $head);
5248                                 });
5249                 }
5250         }
5251 }
5252
5253 sub git_search_grep_body {
5254         my ($commitlist, $from, $to, $extra) = @_;
5255         $from = 0 unless defined $from;
5256         $to = $#{$commitlist} if (!defined $to || $#{$commitlist} < $to);
5257
5258         print "<table class=\"commit_search\">\n";
5259         my $alternate = 1;
5260         for (my $i = $from; $i <= $to; $i++) {
5261                 my %co = %{$commitlist->[$i]};
5262                 if (!%co) {
5263                         next;
5264                 }
5265                 my $commit = $co{'id'};
5266                 if ($alternate) {
5267                         print "<tr class=\"dark\">\n";
5268                 } else {
5269                         print "<tr class=\"light\">\n";
5270                 }
5271                 $alternate ^= 1;
5272                 print "<td title=\"$co{'age_string_age'}\"><i>$co{'age_string_date'}</i></td>\n" .
5273                       format_author_html('td', \%co, 15, 5) .
5274                       "<td>" .
5275                       $cgi->a({-href => href(action=>"commit", hash=>$co{'id'}),
5276                                -class => "list subject"},
5277                               chop_and_escape_str($co{'title'}, 50) . "<br/>");
5278                 my $comment = $co{'comment'};
5279                 foreach my $line (@$comment) {
5280                         if ($line =~ m/^(.*?)($search_regexp)(.*)$/i) {
5281                                 my ($lead, $match, $trail) = ($1, $2, $3);
5282                                 $match = chop_str($match, 70, 5, 'center');
5283                                 my $contextlen = int((80 - length($match))/2);
5284                                 $contextlen = 30 if ($contextlen > 30);
5285                                 $lead  = chop_str($lead,  $contextlen, 10, 'left');
5286                                 $trail = chop_str($trail, $contextlen, 10, 'right');
5287
5288                                 $lead  = esc_html($lead);
5289                                 $match = esc_html($match);
5290                                 $trail = esc_html($trail);
5291
5292                                 print "$lead<span class=\"match\">$match</span>$trail<br />";
5293                         }
5294                 }
5295                 print "</td>\n" .
5296                       "<td class=\"link\">" .
5297                       $cgi->a({-href => href(action=>"commit", hash=>$co{'id'})}, "commit") .
5298                       " | " .
5299                       $cgi->a({-href => href(action=>"commitdiff", hash=>$co{'id'})}, "commitdiff") .
5300                       " | " .
5301                       $cgi->a({-href => href(action=>"tree", hash=>$co{'tree'}, hash_base=>$co{'id'})}, "tree");
5302                 print "</td>\n" .
5303                       "</tr>\n";
5304         }
5305         if (defined $extra) {
5306                 print "<tr>\n" .
5307                       "<td colspan=\"3\">$extra</td>\n" .
5308                       "</tr>\n";
5309         }
5310         print "</table>\n";
5311 }
5312
5313 ## ======================================================================
5314 ## ======================================================================
5315 ## actions
5316
5317 sub git_project_list {
5318         my $order = $input_params{'order'};
5319         if (defined $order && $order !~ m/none|project|descr|owner|age/) {
5320                 die_error(400, "Unknown order parameter");
5321         }
5322
5323         my @list = git_get_projects_list();
5324         if (!@list) {
5325                 die_error(404, "No projects found");
5326         }
5327
5328         git_header_html();
5329         if (defined $home_text && -f $home_text) {
5330                 print "<div class=\"index_include\">\n";
5331                 insert_file($home_text);
5332                 print "</div>\n";
5333         }
5334         print $cgi->startform(-method => "get") .
5335               "<p class=\"projsearch\">Search:\n" .
5336               $cgi->textfield(-name => "s", -value => $searchtext) . "\n" .
5337               "</p>" .
5338               $cgi->end_form() . "\n";
5339         git_project_list_body(\@list, $order);
5340         git_footer_html();
5341 }
5342
5343 sub git_forks {
5344         my $order = $input_params{'order'};
5345         if (defined $order && $order !~ m/none|project|descr|owner|age/) {
5346                 die_error(400, "Unknown order parameter");
5347         }
5348
5349         my @list = git_get_projects_list($project);
5350         if (!@list) {
5351                 die_error(404, "No forks found");
5352         }
5353
5354         git_header_html();
5355         git_print_page_nav('','');
5356         git_print_header_div('summary', "$project forks");
5357         git_project_list_body(\@list, $order);
5358         git_footer_html();
5359 }
5360
5361 sub git_project_index {
5362         my @projects = git_get_projects_list($project);
5363
5364         print $cgi->header(
5365                 -type => 'text/plain',
5366                 -charset => 'utf-8',
5367                 -content_disposition => 'inline; filename="index.aux"');
5368
5369         foreach my $pr (@projects) {
5370                 if (!exists $pr->{'owner'}) {
5371                         $pr->{'owner'} = git_get_project_owner("$pr->{'path'}");
5372                 }
5373
5374                 my ($path, $owner) = ($pr->{'path'}, $pr->{'owner'});
5375                 # quote as in CGI::Util::encode, but keep the slash, and use '+' for ' '
5376                 $path  =~ s/([^a-zA-Z0-9_.\-\/ ])/sprintf("%%%02X", ord($1))/eg;
5377                 $owner =~ s/([^a-zA-Z0-9_.\-\/ ])/sprintf("%%%02X", ord($1))/eg;
5378                 $path  =~ s/ /\+/g;
5379                 $owner =~ s/ /\+/g;
5380
5381                 print "$path $owner\n";
5382         }
5383 }
5384
5385 sub git_summary {
5386         my $descr = git_get_project_description($project) || "none";
5387         my %co = parse_commit("HEAD");
5388         my %cd = %co ? parse_date($co{'committer_epoch'}, $co{'committer_tz'}) : ();
5389         my $head = $co{'id'};
5390         my $remote_heads = gitweb_check_feature('remote_heads');
5391
5392         my $owner = git_get_project_owner($project);
5393
5394         my $refs = git_get_references();
5395         # These get_*_list functions return one more to allow us to see if
5396         # there are more ...
5397         my @taglist  = git_get_tags_list(16);
5398         my @headlist = git_get_heads_list(16);
5399         my %remotedata = $remote_heads ? git_get_remotes_list() : ();
5400         my @forklist;
5401         my $check_forks = gitweb_check_feature('forks');
5402
5403         if ($check_forks) {
5404                 @forklist = git_get_projects_list($project);
5405         }
5406
5407         git_header_html();
5408         git_print_page_nav('summary','', $head);
5409
5410         print "<div class=\"title\">&nbsp;</div>\n";
5411         print "<table class=\"projects_list\">\n" .
5412               "<tr id=\"metadata_desc\"><td>description</td><td>" . esc_html($descr) . "</td></tr>\n" .
5413               "<tr id=\"metadata_owner\"><td>owner</td><td>" . esc_html($owner) . "</td></tr>\n";
5414         if (defined $cd{'rfc2822'}) {
5415                 print "<tr id=\"metadata_lchange\"><td>last change</td>" .
5416                       "<td>".format_timestamp_html(\%cd)."</td></tr>\n";
5417         }
5418
5419         # use per project git URL list in $projectroot/$project/cloneurl
5420         # or make project git URL from git base URL and project name
5421         my $url_tag = "URL";
5422         my @url_list = git_get_project_url_list($project);
5423         @url_list = map { "$_/$project" } @git_base_url_list unless @url_list;
5424         foreach my $git_url (@url_list) {
5425                 next unless $git_url;
5426                 print format_repo_url($url_tag, $git_url);
5427                 $url_tag = "";
5428         }
5429
5430         # Tag cloud
5431         my $show_ctags = gitweb_check_feature('ctags');
5432         if ($show_ctags) {
5433                 my $ctags = git_get_project_ctags($project);
5434                 my $cloud = git_populate_project_tagcloud($ctags);
5435                 print "<tr id=\"metadata_ctags\"><td>Content tags:<br />";
5436                 print "</td>\n<td>" unless %$ctags;
5437                 print "<form action=\"$show_ctags\" method=\"post\"><input type=\"hidden\" name=\"p\" value=\"$project\" />Add: <input type=\"text\" name=\"t\" size=\"8\" /></form>";
5438                 print "</td>\n<td>" if %$ctags;
5439                 print git_show_project_tagcloud($cloud, 48);
5440                 print "</td></tr>";
5441         }
5442
5443         print "</table>\n";
5444
5445         # If XSS prevention is on, we don't include README.html.
5446         # TODO: Allow a readme in some safe format.
5447         if (!$prevent_xss && -s "$projectroot/$project/README.html") {
5448                 print "<div class=\"title\">readme</div>\n" .
5449                       "<div class=\"readme\">\n";
5450                 insert_file("$projectroot/$project/README.html");
5451                 print "\n</div>\n"; # class="readme"
5452         }
5453
5454         # we need to request one more than 16 (0..15) to check if
5455         # those 16 are all
5456         my @commitlist = $head ? parse_commits($head, 17) : ();
5457         if (@commitlist) {
5458                 git_print_header_div('shortlog');
5459                 git_shortlog_body(\@commitlist, 0, 15, $refs,
5460                                   $#commitlist <=  15 ? undef :
5461                                   $cgi->a({-href => href(action=>"shortlog")}, "..."));
5462         }
5463
5464         if (@taglist) {
5465                 git_print_header_div('tags');
5466                 git_tags_body(\@taglist, 0, 15,
5467                               $#taglist <=  15 ? undef :
5468                               $cgi->a({-href => href(action=>"tags")}, "..."));
5469         }
5470
5471         if (@headlist) {
5472                 git_print_header_div('heads');
5473                 git_heads_body(\@headlist, $head, 0, 15,
5474                                $#headlist <= 15 ? undef :
5475                                $cgi->a({-href => href(action=>"heads")}, "..."));
5476         }
5477
5478         if (%remotedata) {
5479                 git_print_header_div('remotes');
5480                 git_remotes_body(\%remotedata, 15, $head);
5481         }
5482
5483         if (@forklist) {
5484                 git_print_header_div('forks');
5485                 git_project_list_body(\@forklist, 'age', 0, 15,
5486                                       $#forklist <= 15 ? undef :
5487                                       $cgi->a({-href => href(action=>"forks")}, "..."),
5488                                       'no_header');
5489         }
5490
5491         git_footer_html();
5492 }
5493
5494 sub git_tag {
5495         my %tag = parse_tag($hash);
5496
5497         if (! %tag) {
5498                 die_error(404, "Unknown tag object");
5499         }
5500
5501         my $head = git_get_head_hash($project);
5502         git_header_html();
5503         git_print_page_nav('','', $head,undef,$head);
5504         git_print_header_div('commit', esc_html($tag{'name'}), $hash);
5505         print "<div class=\"title_text\">\n" .
5506               "<table class=\"object_header\">\n" .
5507               "<tr>\n" .
5508               "<td>object</td>\n" .
5509               "<td>" . $cgi->a({-class => "list", -href => href(action=>$tag{'type'}, hash=>$tag{'object'})},
5510                                $tag{'object'}) . "</td>\n" .
5511               "<td class=\"link\">" . $cgi->a({-href => href(action=>$tag{'type'}, hash=>$tag{'object'})},
5512                                               $tag{'type'}) . "</td>\n" .
5513               "</tr>\n";
5514         if (defined($tag{'author'})) {
5515                 git_print_authorship_rows(\%tag, 'author');
5516         }
5517         print "</table>\n\n" .
5518               "</div>\n";
5519         print "<div class=\"page_body\">";
5520         my $comment = $tag{'comment'};
5521         foreach my $line (@$comment) {
5522                 chomp $line;
5523                 print esc_html($line, -nbsp=>1) . "<br/>\n";
5524         }
5525         print "</div>\n";
5526         git_footer_html();
5527 }
5528
5529 sub git_blame_common {
5530         my $format = shift || 'porcelain';
5531         if ($format eq 'porcelain' && $cgi->param('js')) {
5532                 $format = 'incremental';
5533                 $action = 'blame_incremental'; # for page title etc
5534         }
5535
5536         # permissions
5537         gitweb_check_feature('blame')
5538                 or die_error(403, "Blame view not allowed");
5539
5540         # error checking
5541         die_error(400, "No file name given") unless $file_name;
5542         $hash_base ||= git_get_head_hash($project);
5543         die_error(404, "Couldn't find base commit") unless $hash_base;
5544         my %co = parse_commit($hash_base)
5545                 or die_error(404, "Commit not found");
5546         my $ftype = "blob";
5547         if (!defined $hash) {
5548                 $hash = git_get_hash_by_path($hash_base, $file_name, "blob")
5549                         or die_error(404, "Error looking up file");
5550         } else {
5551                 $ftype = git_get_type($hash);
5552                 if ($ftype !~ "blob") {
5553                         die_error(400, "Object is not a blob");
5554                 }
5555         }
5556
5557         my $fd;
5558         if ($format eq 'incremental') {
5559                 # get file contents (as base)
5560                 open $fd, "-|", git_cmd(), 'cat-file', 'blob', $hash
5561                         or die_error(500, "Open git-cat-file failed");
5562         } elsif ($format eq 'data') {
5563                 # run git-blame --incremental
5564                 open $fd, "-|", git_cmd(), "blame", "--incremental",
5565                         $hash_base, "--", $file_name
5566                         or die_error(500, "Open git-blame --incremental failed");
5567         } else {
5568                 # run git-blame --porcelain
5569                 open $fd, "-|", git_cmd(), "blame", '-p',
5570                         $hash_base, '--', $file_name
5571                         or die_error(500, "Open git-blame --porcelain failed");
5572         }
5573
5574         # incremental blame data returns early
5575         if ($format eq 'data') {
5576                 print $cgi->header(
5577                         -type=>"text/plain", -charset => "utf-8",
5578                         -status=> "200 OK");
5579                 local $| = 1; # output autoflush
5580                 print while <$fd>;
5581                 close $fd
5582                         or print "ERROR $!\n";
5583
5584                 print 'END';
5585                 if (defined $t0 && gitweb_check_feature('timed')) {
5586                         print ' '.
5587                               tv_interval($t0, [ gettimeofday() ]).
5588                               ' '.$number_of_git_cmds;
5589                 }
5590                 print "\n";
5591
5592                 return;
5593         }
5594
5595         # page header
5596         git_header_html();
5597         my $formats_nav =
5598                 $cgi->a({-href => href(action=>"blob", -replay=>1)},
5599                         "blob") .
5600                 " | ";
5601         if ($format eq 'incremental') {
5602                 $formats_nav .=
5603                         $cgi->a({-href => href(action=>"blame", javascript=>0, -replay=>1)},
5604                                 "blame") . " (non-incremental)";
5605         } else {
5606                 $formats_nav .=
5607                         $cgi->a({-href => href(action=>"blame_incremental", -replay=>1)},
5608                                 "blame") . " (incremental)";
5609         }
5610         $formats_nav .=
5611                 " | " .
5612                 $cgi->a({-href => href(action=>"history", -replay=>1)},
5613                         "history") .
5614                 " | " .
5615                 $cgi->a({-href => href(action=>$action, file_name=>$file_name)},
5616                         "HEAD");
5617         git_print_page_nav('','', $hash_base,$co{'tree'},$hash_base, $formats_nav);
5618         git_print_header_div('commit', esc_html($co{'title'}), $hash_base);
5619         git_print_page_path($file_name, $ftype, $hash_base);
5620
5621         # page body
5622         if ($format eq 'incremental') {
5623                 print "<noscript>\n<div class=\"error\"><center><b>\n".
5624                       "This page requires JavaScript to run.\n Use ".
5625                       $cgi->a({-href => href(action=>'blame',javascript=>0,-replay=>1)},
5626                               'this page').
5627                       " instead.\n".
5628                       "</b></center></div>\n</noscript>\n";
5629
5630                 print qq!<div id="progress_bar" style="width: 100%; background-color: yellow"></div>\n!;
5631         }
5632
5633         print qq!<div class="page_body">\n!;
5634         print qq!<div id="progress_info">... / ...</div>\n!
5635                 if ($format eq 'incremental');
5636         print qq!<table id="blame_table" class="blame" width="100%">\n!.
5637               #qq!<col width="5.5em" /><col width="2.5em" /><col width="*" />\n!.
5638               qq!<thead>\n!.
5639               qq!<tr><th>Commit</th><th>Line</th><th>Data</th></tr>\n!.
5640               qq!</thead>\n!.
5641               qq!<tbody>\n!;
5642
5643         my @rev_color = qw(light dark);
5644         my $num_colors = scalar(@rev_color);
5645         my $current_color = 0;
5646
5647         if ($format eq 'incremental') {
5648                 my $color_class = $rev_color[$current_color];
5649
5650                 #contents of a file
5651                 my $linenr = 0;
5652         LINE:
5653                 while (my $line = <$fd>) {
5654                         chomp $line;
5655                         $linenr++;
5656
5657                         print qq!<tr id="l$linenr" class="$color_class">!.
5658                               qq!<td class="sha1"><a href=""> </a></td>!.
5659                               qq!<td class="linenr">!.
5660                               qq!<a class="linenr" href="">$linenr</a></td>!;
5661                         print qq!<td class="pre">! . esc_html($line) . "</td>\n";
5662                         print qq!</tr>\n!;
5663                 }
5664
5665         } else { # porcelain, i.e. ordinary blame
5666                 my %metainfo = (); # saves information about commits
5667
5668                 # blame data
5669         LINE:
5670                 while (my $line = <$fd>) {
5671                         chomp $line;
5672                         # the header: <SHA-1> <src lineno> <dst lineno> [<lines in group>]
5673                         # no <lines in group> for subsequent lines in group of lines
5674                         my ($full_rev, $orig_lineno, $lineno, $group_size) =
5675                            ($line =~ /^([0-9a-f]{40}) (\d+) (\d+)(?: (\d+))?$/);
5676                         if (!exists $metainfo{$full_rev}) {
5677                                 $metainfo{$full_rev} = { 'nprevious' => 0 };
5678                         }
5679                         my $meta = $metainfo{$full_rev};
5680                         my $data;
5681                         while ($data = <$fd>) {
5682                                 chomp $data;
5683                                 last if ($data =~ s/^\t//); # contents of line
5684                                 if ($data =~ /^(\S+)(?: (.*))?$/) {
5685                                         $meta->{$1} = $2 unless exists $meta->{$1};
5686                                 }
5687                                 if ($data =~ /^previous /) {
5688                                         $meta->{'nprevious'}++;
5689                                 }
5690                         }
5691                         my $short_rev = substr($full_rev, 0, 8);
5692                         my $author = $meta->{'author'};
5693                         my %date =
5694                                 parse_date($meta->{'author-time'}, $meta->{'author-tz'});
5695                         my $date = $date{'iso-tz'};
5696                         if ($group_size) {
5697                                 $current_color = ($current_color + 1) % $num_colors;
5698                         }
5699                         my $tr_class = $rev_color[$current_color];
5700                         $tr_class .= ' boundary' if (exists $meta->{'boundary'});
5701                         $tr_class .= ' no-previous' if ($meta->{'nprevious'} == 0);
5702                         $tr_class .= ' multiple-previous' if ($meta->{'nprevious'} > 1);
5703                         print "<tr id=\"l$lineno\" class=\"$tr_class\">\n";
5704                         if ($group_size) {
5705                                 print "<td class=\"sha1\"";
5706                                 print " title=\"". esc_html($author) . ", $date\"";
5707                                 print " rowspan=\"$group_size\"" if ($group_size > 1);
5708                                 print ">";
5709                                 print $cgi->a({-href => href(action=>"commit",
5710                                                              hash=>$full_rev,
5711                                                              file_name=>$file_name)},
5712                                               esc_html($short_rev));
5713                                 if ($group_size >= 2) {
5714                                         my @author_initials = ($author =~ /\b([[:upper:]])\B/g);
5715                                         if (@author_initials) {
5716                                                 print "<br />" .
5717                                                       esc_html(join('', @author_initials));
5718                                                 #           or join('.', ...)
5719                                         }
5720                                 }
5721                                 print "</td>\n";
5722                         }
5723                         # 'previous' <sha1 of parent commit> <filename at commit>
5724                         if (exists $meta->{'previous'} &&
5725                             $meta->{'previous'} =~ /^([a-fA-F0-9]{40}) (.*)$/) {
5726                                 $meta->{'parent'} = $1;
5727                                 $meta->{'file_parent'} = unquote($2);
5728                         }
5729                         my $linenr_commit =
5730                                 exists($meta->{'parent'}) ?
5731                                 $meta->{'parent'} : $full_rev;
5732                         my $linenr_filename =
5733                                 exists($meta->{'file_parent'}) ?
5734                                 $meta->{'file_parent'} : unquote($meta->{'filename'});
5735                         my $blamed = href(action => 'blame',
5736                                           file_name => $linenr_filename,
5737                                           hash_base => $linenr_commit);
5738                         print "<td class=\"linenr\">";
5739                         print $cgi->a({ -href => "$blamed#l$orig_lineno",
5740                                         -class => "linenr" },
5741                                       esc_html($lineno));
5742                         print "</td>";
5743                         print "<td class=\"pre\">" . esc_html($data) . "</td>\n";
5744                         print "</tr>\n";
5745                 } # end while
5746
5747         }
5748
5749         # footer
5750         print "</tbody>\n".
5751               "</table>\n"; # class="blame"
5752         print "</div>\n";   # class="blame_body"
5753         close $fd
5754                 or print "Reading blob failed\n";
5755
5756         git_footer_html();
5757 }
5758
5759 sub git_blame {
5760         git_blame_common();
5761 }
5762
5763 sub git_blame_incremental {
5764         git_blame_common('incremental');
5765 }
5766
5767 sub git_blame_data {
5768         git_blame_common('data');
5769 }
5770
5771 sub git_tags {
5772         my $head = git_get_head_hash($project);
5773         git_header_html();
5774         git_print_page_nav('','', $head,undef,$head,format_ref_views('tags'));
5775         git_print_header_div('summary', $project);
5776
5777         my @tagslist = git_get_tags_list();
5778         if (@tagslist) {
5779                 git_tags_body(\@tagslist);
5780         }
5781         git_footer_html();
5782 }
5783
5784 sub git_heads {
5785         my $head = git_get_head_hash($project);
5786         git_header_html();
5787         git_print_page_nav('','', $head,undef,$head,format_ref_views('heads'));
5788         git_print_header_div('summary', $project);
5789
5790         my @headslist = git_get_heads_list();
5791         if (@headslist) {
5792                 git_heads_body(\@headslist, $head);
5793         }
5794         git_footer_html();
5795 }
5796
5797 # used both for single remote view and for list of all the remotes
5798 sub git_remotes {
5799         gitweb_check_feature('remote_heads')
5800                 or die_error(403, "Remote heads view is disabled");
5801
5802         my $head = git_get_head_hash($project);
5803         my $remote = $input_params{'hash'};
5804
5805         my $remotedata = git_get_remotes_list($remote);
5806         die_error(500, "Unable to get remote information") unless defined $remotedata;
5807
5808         unless (%$remotedata) {
5809                 die_error(404, defined $remote ?
5810                         "Remote $remote not found" :
5811                         "No remotes found");
5812         }
5813
5814         git_header_html(undef, undef, -action_extra => $remote);
5815         git_print_page_nav('', '',  $head, undef, $head,
5816                 format_ref_views($remote ? '' : 'remotes'));
5817
5818         fill_remote_heads($remotedata);
5819         if (defined $remote) {
5820                 git_print_header_div('remotes', "$remote remote for $project");
5821                 git_remote_block($remote, $remotedata->{$remote}, undef, $head);
5822         } else {
5823                 git_print_header_div('summary', "$project remotes");
5824                 git_remotes_body($remotedata, undef, $head);
5825         }
5826
5827         git_footer_html();
5828 }
5829
5830 sub git_blob_plain {
5831         my $type = shift;
5832         my $expires;
5833
5834         if (!defined $hash) {
5835                 if (defined $file_name) {
5836                         my $base = $hash_base || git_get_head_hash($project);
5837                         $hash = git_get_hash_by_path($base, $file_name, "blob")
5838                                 or die_error(404, "Cannot find file");
5839                 } else {
5840                         die_error(400, "No file name defined");
5841                 }
5842         } elsif ($hash =~ m/^[0-9a-fA-F]{40}$/) {
5843                 # blobs defined by non-textual hash id's can be cached
5844                 $expires = "+1d";
5845         }
5846
5847         open my $fd, "-|", git_cmd(), "cat-file", "blob", $hash
5848                 or die_error(500, "Open git-cat-file blob '$hash' failed");
5849
5850         # content-type (can include charset)
5851         $type = blob_contenttype($fd, $file_name, $type);
5852
5853         # "save as" filename, even when no $file_name is given
5854         my $save_as = "$hash";
5855         if (defined $file_name) {
5856                 $save_as = $file_name;
5857         } elsif ($type =~ m/^text\//) {
5858                 $save_as .= '.txt';
5859         }
5860
5861         # With XSS prevention on, blobs of all types except a few known safe
5862         # ones are served with "Content-Disposition: attachment" to make sure
5863         # they don't run in our security domain.  For certain image types,
5864         # blob view writes an <img> tag referring to blob_plain view, and we
5865         # want to be sure not to break that by serving the image as an
5866         # attachment (though Firefox 3 doesn't seem to care).
5867         my $sandbox = $prevent_xss &&
5868                 $type !~ m!^(?:text/plain|image/(?:gif|png|jpeg))$!;
5869
5870         print $cgi->header(
5871                 -type => $type,
5872                 -expires => $expires,
5873                 -content_disposition =>
5874                         ($sandbox ? 'attachment' : 'inline')
5875                         . '; filename="' . $save_as . '"');
5876         local $/ = undef;
5877         binmode STDOUT, ':raw';
5878         print <$fd>;
5879         binmode STDOUT, ':utf8'; # as set at the beginning of gitweb.cgi
5880         close $fd;
5881 }
5882
5883 sub git_blob {
5884         my $expires;
5885
5886         if (!defined $hash) {
5887                 if (defined $file_name) {
5888                         my $base = $hash_base || git_get_head_hash($project);
5889                         $hash = git_get_hash_by_path($base, $file_name, "blob")
5890                                 or die_error(404, "Cannot find file");
5891                 } else {
5892                         die_error(400, "No file name defined");
5893                 }
5894         } elsif ($hash =~ m/^[0-9a-fA-F]{40}$/) {
5895                 # blobs defined by non-textual hash id's can be cached
5896                 $expires = "+1d";
5897         }
5898
5899         my $have_blame = gitweb_check_feature('blame');
5900         open my $fd, "-|", git_cmd(), "cat-file", "blob", $hash
5901                 or die_error(500, "Couldn't cat $file_name, $hash");
5902         my $mimetype = blob_mimetype($fd, $file_name);
5903         # use 'blob_plain' (aka 'raw') view for files that cannot be displayed
5904         if ($mimetype !~ m!^(?:text/|image/(?:gif|png|jpeg)$)! && -B $fd) {
5905                 close $fd;
5906                 return git_blob_plain($mimetype);
5907         }
5908         # we can have blame only for text/* mimetype
5909         $have_blame &&= ($mimetype =~ m!^text/!);
5910
5911         my $highlight = gitweb_check_feature('highlight');
5912         my $syntax = guess_file_syntax($highlight, $mimetype, $file_name);
5913         $fd = run_highlighter($fd, $highlight, $syntax)
5914                 if $syntax;
5915
5916         git_header_html(undef, $expires);
5917         my $formats_nav = '';
5918         if (defined $hash_base && (my %co = parse_commit($hash_base))) {
5919                 if (defined $file_name) {
5920                         if ($have_blame) {
5921                                 $formats_nav .=
5922                                         $cgi->a({-href => href(action=>"blame", -replay=>1)},
5923                                                 "blame") .
5924                                         " | ";
5925                         }
5926                         $formats_nav .=
5927                                 $cgi->a({-href => href(action=>"history", -replay=>1)},
5928                                         "history") .
5929                                 " | " .
5930                                 $cgi->a({-href => href(action=>"blob_plain", -replay=>1)},
5931                                         "raw") .
5932                                 " | " .
5933                                 $cgi->a({-href => href(action=>"blob",
5934                                                        hash_base=>"HEAD", file_name=>$file_name)},
5935                                         "HEAD");
5936                 } else {
5937                         $formats_nav .=
5938                                 $cgi->a({-href => href(action=>"blob_plain", -replay=>1)},
5939                                         "raw");
5940                 }
5941                 git_print_page_nav('','', $hash_base,$co{'tree'},$hash_base, $formats_nav);
5942                 git_print_header_div('commit', esc_html($co{'title'}), $hash_base);
5943         } else {
5944                 print "<div class=\"page_nav\">\n" .
5945                       "<br/><br/></div>\n" .
5946                       "<div class=\"title\">".esc_html($hash)."</div>\n";
5947         }
5948         git_print_page_path($file_name, "blob", $hash_base);
5949         print "<div class=\"page_body\">\n";
5950         if ($mimetype =~ m!^image/!) {
5951                 print qq!<img type="!.esc_attr($mimetype).qq!"!;
5952                 if ($file_name) {
5953                         print qq! alt="!.esc_attr($file_name).qq!" title="!.esc_attr($file_name).qq!"!;
5954                 }
5955                 print qq! src="! .
5956                       href(action=>"blob_plain", hash=>$hash,
5957                            hash_base=>$hash_base, file_name=>$file_name) .
5958                       qq!" />\n!;
5959         } else {
5960                 my $nr;
5961                 while (my $line = <$fd>) {
5962                         chomp $line;
5963                         $nr++;
5964                         $line = untabify($line);
5965                         printf qq!<div class="pre"><a id="l%i" href="%s#l%i" class="linenr">%4i</a> %s</div>\n!,
5966                                $nr, esc_attr(href(-replay => 1)), $nr, $nr, $syntax ? $line : esc_html($line, -nbsp=>1);
5967                 }
5968         }
5969         close $fd
5970                 or print "Reading blob failed.\n";
5971         print "</div>";
5972         git_footer_html();
5973 }
5974
5975 sub git_tree {
5976         if (!defined $hash_base) {
5977                 $hash_base = "HEAD";
5978         }
5979         if (!defined $hash) {
5980                 if (defined $file_name) {
5981                         $hash = git_get_hash_by_path($hash_base, $file_name, "tree");
5982                 } else {
5983                         $hash = $hash_base;
5984                 }
5985         }
5986         die_error(404, "No such tree") unless defined($hash);
5987
5988         my $show_sizes = gitweb_check_feature('show-sizes');
5989         my $have_blame = gitweb_check_feature('blame');
5990
5991         my @entries = ();
5992         {
5993                 local $/ = "\0";
5994                 open my $fd, "-|", git_cmd(), "ls-tree", '-z',
5995                         ($show_sizes ? '-l' : ()), @extra_options, $hash
5996                         or die_error(500, "Open git-ls-tree failed");
5997                 @entries = map { chomp; $_ } <$fd>;
5998                 close $fd
5999                         or die_error(404, "Reading tree failed");
6000         }
6001
6002         my $refs = git_get_references();
6003         my $ref = format_ref_marker($refs, $hash_base);
6004         git_header_html();
6005         my $basedir = '';
6006         if (defined $hash_base && (my %co = parse_commit($hash_base))) {
6007                 my @views_nav = ();
6008                 if (defined $file_name) {
6009                         push @views_nav,
6010                                 $cgi->a({-href => href(action=>"history", -replay=>1)},
6011                                         "history"),
6012                                 $cgi->a({-href => href(action=>"tree",
6013                                                        hash_base=>"HEAD", file_name=>$file_name)},
6014                                         "HEAD"),
6015                 }
6016                 my $snapshot_links = format_snapshot_links($hash);
6017                 if (defined $snapshot_links) {
6018                         # FIXME: Should be available when we have no hash base as well.
6019                         push @views_nav, $snapshot_links;
6020                 }
6021                 git_print_page_nav('tree','', $hash_base, undef, undef,
6022                                    join(' | ', @views_nav));
6023                 git_print_header_div('commit', esc_html($co{'title'}) . $ref, $hash_base);
6024         } else {
6025                 undef $hash_base;
6026                 print "<div class=\"page_nav\">\n";
6027                 print "<br/><br/></div>\n";
6028                 print "<div class=\"title\">".esc_html($hash)."</div>\n";
6029         }
6030         if (defined $file_name) {
6031                 $basedir = $file_name;
6032                 if ($basedir ne '' && substr($basedir, -1) ne '/') {
6033                         $basedir .= '/';
6034                 }
6035                 git_print_page_path($file_name, 'tree', $hash_base);
6036         }
6037         print "<div class=\"page_body\">\n";
6038         print "<table class=\"tree\">\n";
6039         my $alternate = 1;
6040         # '..' (top directory) link if possible
6041         if (defined $hash_base &&
6042             defined $file_name && $file_name =~ m![^/]+$!) {
6043                 if ($alternate) {
6044                         print "<tr class=\"dark\">\n";
6045                 } else {
6046                         print "<tr class=\"light\">\n";
6047                 }
6048                 $alternate ^= 1;
6049
6050                 my $up = $file_name;
6051                 $up =~ s!/?[^/]+$!!;
6052                 undef $up unless $up;
6053                 # based on git_print_tree_entry
6054                 print '<td class="mode">' . mode_str('040000') . "</td>\n";
6055                 print '<td class="size">&nbsp;</td>'."\n" if $show_sizes;
6056                 print '<td class="list">';
6057                 print $cgi->a({-href => href(action=>"tree",
6058                                              hash_base=>$hash_base,
6059                                              file_name=>$up)},
6060                               "..");
6061                 print "</td>\n";
6062                 print "<td class=\"link\"></td>\n";
6063
6064                 print "</tr>\n";
6065         }
6066         foreach my $line (@entries) {
6067                 my %t = parse_ls_tree_line($line, -z => 1, -l => $show_sizes);
6068
6069                 if ($alternate) {
6070                         print "<tr class=\"dark\">\n";
6071                 } else {
6072                         print "<tr class=\"light\">\n";
6073                 }
6074                 $alternate ^= 1;
6075
6076                 git_print_tree_entry(\%t, $basedir, $hash_base, $have_blame);
6077
6078                 print "</tr>\n";
6079         }
6080         print "</table>\n" .
6081               "</div>";
6082         git_footer_html();
6083 }
6084
6085 sub snapshot_name {
6086         my ($project, $hash) = @_;
6087
6088         # path/to/project.git  -> project
6089         # path/to/project/.git -> project
6090         my $name = to_utf8($project);
6091         $name =~ s,([^/])/*\.git$,$1,;
6092         $name = basename($name);
6093         # sanitize name
6094         $name =~ s/[[:cntrl:]]/?/g;
6095
6096         my $ver = $hash;
6097         if ($hash =~ /^[0-9a-fA-F]+$/) {
6098                 # shorten SHA-1 hash
6099                 my $full_hash = git_get_full_hash($project, $hash);
6100                 if ($full_hash =~ /^$hash/ && length($hash) > 7) {
6101                         $ver = git_get_short_hash($project, $hash);
6102                 }
6103         } elsif ($hash =~ m!^refs/tags/(.*)$!) {
6104                 # tags don't need shortened SHA-1 hash
6105                 $ver = $1;
6106         } else {
6107                 # branches and other need shortened SHA-1 hash
6108                 if ($hash =~ m!^refs/(?:heads|remotes)/(.*)$!) {
6109                         $ver = $1;
6110                 }
6111                 $ver .= '-' . git_get_short_hash($project, $hash);
6112         }
6113         # in case of hierarchical branch names
6114         $ver =~ s!/!.!g;
6115
6116         # name = project-version_string
6117         $name = "$name-$ver";
6118
6119         return wantarray ? ($name, $name) : $name;
6120 }
6121
6122 sub git_snapshot {
6123         my $format = $input_params{'snapshot_format'};
6124         if (!@snapshot_fmts) {
6125                 die_error(403, "Snapshots not allowed");
6126         }
6127         # default to first supported snapshot format
6128         $format ||= $snapshot_fmts[0];
6129         if ($format !~ m/^[a-z0-9]+$/) {
6130                 die_error(400, "Invalid snapshot format parameter");
6131         } elsif (!exists($known_snapshot_formats{$format})) {
6132                 die_error(400, "Unknown snapshot format");
6133         } elsif ($known_snapshot_formats{$format}{'disabled'}) {
6134                 die_error(403, "Snapshot format not allowed");
6135         } elsif (!grep($_ eq $format, @snapshot_fmts)) {
6136                 die_error(403, "Unsupported snapshot format");
6137         }
6138
6139         my $type = git_get_type("$hash^{}");
6140         if (!$type) {
6141                 die_error(404, 'Object does not exist');
6142         }  elsif ($type eq 'blob') {
6143                 die_error(400, 'Object is not a tree-ish');
6144         }
6145
6146         my ($name, $prefix) = snapshot_name($project, $hash);
6147         my $filename = "$name$known_snapshot_formats{$format}{'suffix'}";
6148         my $cmd = quote_command(
6149                 git_cmd(), 'archive',
6150                 "--format=$known_snapshot_formats{$format}{'format'}",
6151                 "--prefix=$prefix/", $hash);
6152         if (exists $known_snapshot_formats{$format}{'compressor'}) {
6153                 $cmd .= ' | ' . quote_command(@{$known_snapshot_formats{$format}{'compressor'}});
6154         }
6155
6156         $filename =~ s/(["\\])/\\$1/g;
6157         print $cgi->header(
6158                 -type => $known_snapshot_formats{$format}{'type'},
6159                 -content_disposition => 'inline; filename="' . $filename . '"',
6160                 -status => '200 OK');
6161
6162         open my $fd, "-|", $cmd
6163                 or die_error(500, "Execute git-archive failed");
6164         binmode STDOUT, ':raw';
6165         print <$fd>;
6166         binmode STDOUT, ':utf8'; # as set at the beginning of gitweb.cgi
6167         close $fd;
6168 }
6169
6170 sub git_log_generic {
6171         my ($fmt_name, $body_subr, $base, $parent, $file_name, $file_hash) = @_;
6172
6173         my $head = git_get_head_hash($project);
6174         if (!defined $base) {
6175                 $base = $head;
6176         }
6177         if (!defined $page) {
6178                 $page = 0;
6179         }
6180         my $refs = git_get_references();
6181
6182         my $commit_hash = $base;
6183         if (defined $parent) {
6184                 $commit_hash = "$parent..$base";
6185         }
6186         my @commitlist =
6187                 parse_commits($commit_hash, 101, (100 * $page),
6188                               defined $file_name ? ($file_name, "--full-history") : ());
6189
6190         my $ftype;
6191         if (!defined $file_hash && defined $file_name) {
6192                 # some commits could have deleted file in question,
6193                 # and not have it in tree, but one of them has to have it
6194                 for (my $i = 0; $i < @commitlist; $i++) {
6195                         $file_hash = git_get_hash_by_path($commitlist[$i]{'id'}, $file_name);
6196                         last if defined $file_hash;
6197                 }
6198         }
6199         if (defined $file_hash) {
6200                 $ftype = git_get_type($file_hash);
6201         }
6202         if (defined $file_name && !defined $ftype) {
6203                 die_error(500, "Unknown type of object");
6204         }
6205         my %co;
6206         if (defined $file_name) {
6207                 %co = parse_commit($base)
6208                         or die_error(404, "Unknown commit object");
6209         }
6210
6211
6212         my $paging_nav = format_paging_nav($fmt_name, $page, $#commitlist >= 100);
6213         my $next_link = '';
6214         if ($#commitlist >= 100) {
6215                 $next_link =
6216                         $cgi->a({-href => href(-replay=>1, page=>$page+1),
6217                                  -accesskey => "n", -title => "Alt-n"}, "next");
6218         }
6219         my $patch_max = gitweb_get_feature('patches');
6220         if ($patch_max && !defined $file_name) {
6221                 if ($patch_max < 0 || @commitlist <= $patch_max) {
6222                         $paging_nav .= " &sdot; " .
6223                                 $cgi->a({-href => href(action=>"patches", -replay=>1)},
6224                                         "patches");
6225                 }
6226         }
6227
6228         git_header_html();
6229         git_print_page_nav($fmt_name,'', $hash,$hash,$hash, $paging_nav);
6230         if (defined $file_name) {
6231                 git_print_header_div('commit', esc_html($co{'title'}), $base);
6232         } else {
6233                 git_print_header_div('summary', $project)
6234         }
6235         git_print_page_path($file_name, $ftype, $hash_base)
6236                 if (defined $file_name);
6237
6238         $body_subr->(\@commitlist, 0, 99, $refs, $next_link,
6239                      $file_name, $file_hash, $ftype);
6240
6241         git_footer_html();
6242 }
6243
6244 sub git_log {
6245         git_log_generic('log', \&git_log_body,
6246                         $hash, $hash_parent);
6247 }
6248
6249 sub git_commit {
6250         $hash ||= $hash_base || "HEAD";
6251         my %co = parse_commit($hash)
6252             or die_error(404, "Unknown commit object");
6253
6254         my $parent  = $co{'parent'};
6255         my $parents = $co{'parents'}; # listref
6256
6257         # we need to prepare $formats_nav before any parameter munging
6258         my $formats_nav;
6259         if (!defined $parent) {
6260                 # --root commitdiff
6261                 $formats_nav .= '(initial)';
6262         } elsif (@$parents == 1) {
6263                 # single parent commit
6264                 $formats_nav .=
6265                         '(parent: ' .
6266                         $cgi->a({-href => href(action=>"commit",
6267                                                hash=>$parent)},
6268                                 esc_html(substr($parent, 0, 7))) .
6269                         ')';
6270         } else {
6271                 # merge commit
6272                 $formats_nav .=
6273                         '(merge: ' .
6274                         join(' ', map {
6275                                 $cgi->a({-href => href(action=>"commit",
6276                                                        hash=>$_)},
6277                                         esc_html(substr($_, 0, 7)));
6278                         } @$parents ) .
6279                         ')';
6280         }
6281         if (gitweb_check_feature('patches') && @$parents <= 1) {
6282                 $formats_nav .= " | " .
6283                         $cgi->a({-href => href(action=>"patch", -replay=>1)},
6284                                 "patch");
6285         }
6286
6287         if (!defined $parent) {
6288                 $parent = "--root";
6289         }
6290         my @difftree;
6291         open my $fd, "-|", git_cmd(), "diff-tree", '-r', "--no-commit-id",
6292                 @diff_opts,
6293                 (@$parents <= 1 ? $parent : '-c'),
6294                 $hash, "--"
6295                 or die_error(500, "Open git-diff-tree failed");
6296         @difftree = map { chomp; $_ } <$fd>;
6297         close $fd or die_error(404, "Reading git-diff-tree failed");
6298
6299         # non-textual hash id's can be cached
6300         my $expires;
6301         if ($hash =~ m/^[0-9a-fA-F]{40}$/) {
6302                 $expires = "+1d";
6303         }
6304         my $refs = git_get_references();
6305         my $ref = format_ref_marker($refs, $co{'id'});
6306
6307         git_header_html(undef, $expires);
6308         git_print_page_nav('commit', '',
6309                            $hash, $co{'tree'}, $hash,
6310                            $formats_nav);
6311
6312         if (defined $co{'parent'}) {
6313                 git_print_header_div('commitdiff', esc_html($co{'title'}) . $ref, $hash);
6314         } else {
6315                 git_print_header_div('tree', esc_html($co{'title'}) . $ref, $co{'tree'}, $hash);
6316         }
6317         print "<div class=\"title_text\">\n" .
6318               "<table class=\"object_header\">\n";
6319         git_print_authorship_rows(\%co);
6320         print "<tr><td>commit</td><td class=\"sha1\">$co{'id'}</td></tr>\n";
6321         print "<tr>" .
6322               "<td>tree</td>" .
6323               "<td class=\"sha1\">" .
6324               $cgi->a({-href => href(action=>"tree", hash=>$co{'tree'}, hash_base=>$hash),
6325                        class => "list"}, $co{'tree'}) .
6326               "</td>" .
6327               "<td class=\"link\">" .
6328               $cgi->a({-href => href(action=>"tree", hash=>$co{'tree'}, hash_base=>$hash)},
6329                       "tree");
6330         my $snapshot_links = format_snapshot_links($hash);
6331         if (defined $snapshot_links) {
6332                 print " | " . $snapshot_links;
6333         }
6334         print "</td>" .
6335               "</tr>\n";
6336
6337         foreach my $par (@$parents) {
6338                 print "<tr>" .
6339                       "<td>parent</td>" .
6340                       "<td class=\"sha1\">" .
6341                       $cgi->a({-href => href(action=>"commit", hash=>$par),
6342                                class => "list"}, $par) .
6343                       "</td>" .
6344                       "<td class=\"link\">" .
6345                       $cgi->a({-href => href(action=>"commit", hash=>$par)}, "commit") .
6346                       " | " .
6347                       $cgi->a({-href => href(action=>"commitdiff", hash=>$hash, hash_parent=>$par)}, "diff") .
6348                       "</td>" .
6349                       "</tr>\n";
6350         }
6351         print "</table>".
6352               "</div>\n";
6353
6354         print "<div class=\"page_body\">\n";
6355         git_print_log($co{'comment'});
6356         print "</div>\n";
6357
6358         git_difftree_body(\@difftree, $hash, @$parents);
6359
6360         git_footer_html();
6361 }
6362
6363 sub git_object {
6364         # object is defined by:
6365         # - hash or hash_base alone
6366         # - hash_base and file_name
6367         my $type;
6368
6369         # - hash or hash_base alone
6370         if ($hash || ($hash_base && !defined $file_name)) {
6371                 my $object_id = $hash || $hash_base;
6372
6373                 open my $fd, "-|", quote_command(
6374                         git_cmd(), 'cat-file', '-t', $object_id) . ' 2> /dev/null'
6375                         or die_error(404, "Object does not exist");
6376                 $type = <$fd>;
6377                 chomp $type;
6378                 close $fd
6379                         or die_error(404, "Object does not exist");
6380
6381         # - hash_base and file_name
6382         } elsif ($hash_base && defined $file_name) {
6383                 $file_name =~ s,/+$,,;
6384
6385                 system(git_cmd(), "cat-file", '-e', $hash_base) == 0
6386                         or die_error(404, "Base object does not exist");
6387
6388                 # here errors should not hapen
6389                 open my $fd, "-|", git_cmd(), "ls-tree", $hash_base, "--", $file_name
6390                         or die_error(500, "Open git-ls-tree failed");
6391                 my $line = <$fd>;
6392                 close $fd;
6393
6394                 #'100644 blob 0fa3f3a66fb6a137f6ec2c19351ed4d807070ffa  panic.c'
6395                 unless ($line && $line =~ m/^([0-9]+) (.+) ([0-9a-fA-F]{40})\t/) {
6396                         die_error(404, "File or directory for given base does not exist");
6397                 }
6398                 $type = $2;
6399                 $hash = $3;
6400         } else {
6401                 die_error(400, "Not enough information to find object");
6402         }
6403
6404         print $cgi->redirect(-uri => href(action=>$type, -full=>1,
6405                                           hash=>$hash, hash_base=>$hash_base,
6406                                           file_name=>$file_name),
6407                              -status => '302 Found');
6408 }
6409
6410 sub git_blobdiff {
6411         my $format = shift || 'html';
6412
6413         my $fd;
6414         my @difftree;
6415         my %diffinfo;
6416         my $expires;
6417
6418         # preparing $fd and %diffinfo for git_patchset_body
6419         # new style URI
6420         if (defined $hash_base && defined $hash_parent_base) {
6421                 if (defined $file_name) {
6422                         # read raw output
6423                         open $fd, "-|", git_cmd(), "diff-tree", '-r', @diff_opts,
6424                                 $hash_parent_base, $hash_base,
6425                                 "--", (defined $file_parent ? $file_parent : ()), $file_name
6426                                 or die_error(500, "Open git-diff-tree failed");
6427                         @difftree = map { chomp; $_ } <$fd>;
6428                         close $fd
6429                                 or die_error(404, "Reading git-diff-tree failed");
6430                         @difftree
6431                                 or die_error(404, "Blob diff not found");
6432
6433                 } elsif (defined $hash &&
6434                          $hash =~ /[0-9a-fA-F]{40}/) {
6435                         # try to find filename from $hash
6436
6437                         # read filtered raw output
6438                         open $fd, "-|", git_cmd(), "diff-tree", '-r', @diff_opts,
6439                                 $hash_parent_base, $hash_base, "--"
6440                                 or die_error(500, "Open git-diff-tree failed");
6441                         @difftree =
6442                                 # ':100644 100644 03b21826... 3b93d5e7... M     ls-files.c'
6443                                 # $hash == to_id
6444                                 grep { /^:[0-7]{6} [0-7]{6} [0-9a-fA-F]{40} $hash/ }
6445                                 map { chomp; $_ } <$fd>;
6446                         close $fd
6447                                 or die_error(404, "Reading git-diff-tree failed");
6448                         @difftree
6449                                 or die_error(404, "Blob diff not found");
6450
6451                 } else {
6452                         die_error(400, "Missing one of the blob diff parameters");
6453                 }
6454
6455                 if (@difftree > 1) {
6456                         die_error(400, "Ambiguous blob diff specification");
6457                 }
6458
6459                 %diffinfo = parse_difftree_raw_line($difftree[0]);
6460                 $file_parent ||= $diffinfo{'from_file'} || $file_name;
6461                 $file_name   ||= $diffinfo{'to_file'};
6462
6463                 $hash_parent ||= $diffinfo{'from_id'};
6464                 $hash        ||= $diffinfo{'to_id'};
6465
6466                 # non-textual hash id's can be cached
6467                 if ($hash_base =~ m/^[0-9a-fA-F]{40}$/ &&
6468                     $hash_parent_base =~ m/^[0-9a-fA-F]{40}$/) {
6469                         $expires = '+1d';
6470                 }
6471
6472                 # open patch output
6473                 open $fd, "-|", git_cmd(), "diff-tree", '-r', @diff_opts,
6474                         '-p', ($format eq 'html' ? "--full-index" : ()),
6475                         $hash_parent_base, $hash_base,
6476                         "--", (defined $file_parent ? $file_parent : ()), $file_name
6477                         or die_error(500, "Open git-diff-tree failed");
6478         }
6479
6480         # old/legacy style URI -- not generated anymore since 1.4.3.
6481         if (!%diffinfo) {
6482                 die_error('404 Not Found', "Missing one of the blob diff parameters")
6483         }
6484
6485         # header
6486         if ($format eq 'html') {
6487                 my $formats_nav =
6488                         $cgi->a({-href => href(action=>"blobdiff_plain", -replay=>1)},
6489                                 "raw");
6490                 git_header_html(undef, $expires);
6491                 if (defined $hash_base && (my %co = parse_commit($hash_base))) {
6492                         git_print_page_nav('','', $hash_base,$co{'tree'},$hash_base, $formats_nav);
6493                         git_print_header_div('commit', esc_html($co{'title'}), $hash_base);
6494                 } else {
6495                         print "<div class=\"page_nav\"><br/>$formats_nav<br/></div>\n";
6496                         print "<div class=\"title\">".esc_html("$hash vs $hash_parent")."</div>\n";
6497                 }
6498                 if (defined $file_name) {
6499                         git_print_page_path($file_name, "blob", $hash_base);
6500                 } else {
6501                         print "<div class=\"page_path\"></div>\n";
6502                 }
6503
6504         } elsif ($format eq 'plain') {
6505                 print $cgi->header(
6506                         -type => 'text/plain',
6507                         -charset => 'utf-8',
6508                         -expires => $expires,
6509                         -content_disposition => 'inline; filename="' . "$file_name" . '.patch"');
6510
6511                 print "X-Git-Url: " . $cgi->self_url() . "\n\n";
6512
6513         } else {
6514                 die_error(400, "Unknown blobdiff format");
6515         }
6516
6517         # patch
6518         if ($format eq 'html') {
6519                 print "<div class=\"page_body\">\n";
6520
6521                 git_patchset_body($fd, [ \%diffinfo ], $hash_base, $hash_parent_base);
6522                 close $fd;
6523
6524                 print "</div>\n"; # class="page_body"
6525                 git_footer_html();
6526
6527         } else {
6528                 while (my $line = <$fd>) {
6529                         $line =~ s!a/($hash|$hash_parent)!'a/'.esc_path($diffinfo{'from_file'})!eg;
6530                         $line =~ s!b/($hash|$hash_parent)!'b/'.esc_path($diffinfo{'to_file'})!eg;
6531
6532                         print $line;
6533
6534                         last if $line =~ m!^\+\+\+!;
6535                 }
6536                 local $/ = undef;
6537                 print <$fd>;
6538                 close $fd;
6539         }
6540 }
6541
6542 sub git_blobdiff_plain {
6543         git_blobdiff('plain');
6544 }
6545
6546 sub git_commitdiff {
6547         my %params = @_;
6548         my $format = $params{-format} || 'html';
6549
6550         my ($patch_max) = gitweb_get_feature('patches');
6551         if ($format eq 'patch') {
6552                 die_error(403, "Patch view not allowed") unless $patch_max;
6553         }
6554
6555         $hash ||= $hash_base || "HEAD";
6556         my %co = parse_commit($hash)
6557             or die_error(404, "Unknown commit object");
6558
6559         # choose format for commitdiff for merge
6560         if (! defined $hash_parent && @{$co{'parents'}} > 1) {
6561                 $hash_parent = '--cc';
6562         }
6563         # we need to prepare $formats_nav before almost any parameter munging
6564         my $formats_nav;
6565         if ($format eq 'html') {
6566                 $formats_nav =
6567                         $cgi->a({-href => href(action=>"commitdiff_plain", -replay=>1)},
6568                                 "raw");
6569                 if ($patch_max && @{$co{'parents'}} <= 1) {
6570                         $formats_nav .= " | " .
6571                                 $cgi->a({-href => href(action=>"patch", -replay=>1)},
6572                                         "patch");
6573                 }
6574
6575                 if (defined $hash_parent &&
6576                     $hash_parent ne '-c' && $hash_parent ne '--cc') {
6577                         # commitdiff with two commits given
6578                         my $hash_parent_short = $hash_parent;
6579                         if ($hash_parent =~ m/^[0-9a-fA-F]{40}$/) {
6580                                 $hash_parent_short = substr($hash_parent, 0, 7);
6581                         }
6582                         $formats_nav .=
6583                                 ' (from';
6584                         for (my $i = 0; $i < @{$co{'parents'}}; $i++) {
6585                                 if ($co{'parents'}[$i] eq $hash_parent) {
6586                                         $formats_nav .= ' parent ' . ($i+1);
6587                                         last;
6588                                 }
6589                         }
6590                         $formats_nav .= ': ' .
6591                                 $cgi->a({-href => href(action=>"commitdiff",
6592                                                        hash=>$hash_parent)},
6593                                         esc_html($hash_parent_short)) .
6594                                 ')';
6595                 } elsif (!$co{'parent'}) {
6596                         # --root commitdiff
6597                         $formats_nav .= ' (initial)';
6598                 } elsif (scalar @{$co{'parents'}} == 1) {
6599                         # single parent commit
6600                         $formats_nav .=
6601                                 ' (parent: ' .
6602                                 $cgi->a({-href => href(action=>"commitdiff",
6603                                                        hash=>$co{'parent'})},
6604                                         esc_html(substr($co{'parent'}, 0, 7))) .
6605                                 ')';
6606                 } else {
6607                         # merge commit
6608                         if ($hash_parent eq '--cc') {
6609                                 $formats_nav .= ' | ' .
6610                                         $cgi->a({-href => href(action=>"commitdiff",
6611                                                                hash=>$hash, hash_parent=>'-c')},
6612                                                 'combined');
6613                         } else { # $hash_parent eq '-c'
6614                                 $formats_nav .= ' | ' .
6615                                         $cgi->a({-href => href(action=>"commitdiff",
6616                                                                hash=>$hash, hash_parent=>'--cc')},
6617                                                 'compact');
6618                         }
6619                         $formats_nav .=
6620                                 ' (merge: ' .
6621                                 join(' ', map {
6622                                         $cgi->a({-href => href(action=>"commitdiff",
6623                                                                hash=>$_)},
6624                                                 esc_html(substr($_, 0, 7)));
6625                                 } @{$co{'parents'}} ) .
6626                                 ')';
6627                 }
6628         }
6629
6630         my $hash_parent_param = $hash_parent;
6631         if (!defined $hash_parent_param) {
6632                 # --cc for multiple parents, --root for parentless
6633                 $hash_parent_param =
6634                         @{$co{'parents'}} > 1 ? '--cc' : $co{'parent'} || '--root';
6635         }
6636
6637         # read commitdiff
6638         my $fd;
6639         my @difftree;
6640         if ($format eq 'html') {
6641                 open $fd, "-|", git_cmd(), "diff-tree", '-r', @diff_opts,
6642                         "--no-commit-id", "--patch-with-raw", "--full-index",
6643                         $hash_parent_param, $hash, "--"
6644                         or die_error(500, "Open git-diff-tree failed");
6645
6646                 while (my $line = <$fd>) {
6647                         chomp $line;
6648                         # empty line ends raw part of diff-tree output
6649                         last unless $line;
6650                         push @difftree, scalar parse_difftree_raw_line($line);
6651                 }
6652
6653         } elsif ($format eq 'plain') {
6654                 open $fd, "-|", git_cmd(), "diff-tree", '-r', @diff_opts,
6655                         '-p', $hash_parent_param, $hash, "--"
6656                         or die_error(500, "Open git-diff-tree failed");
6657         } elsif ($format eq 'patch') {
6658                 # For commit ranges, we limit the output to the number of
6659                 # patches specified in the 'patches' feature.
6660                 # For single commits, we limit the output to a single patch,
6661                 # diverging from the git-format-patch default.
6662                 my @commit_spec = ();
6663                 if ($hash_parent) {
6664                         if ($patch_max > 0) {
6665                                 push @commit_spec, "-$patch_max";
6666                         }
6667                         push @commit_spec, '-n', "$hash_parent..$hash";
6668                 } else {
6669                         if ($params{-single}) {
6670                                 push @commit_spec, '-1';
6671                         } else {
6672                                 if ($patch_max > 0) {
6673                                         push @commit_spec, "-$patch_max";
6674                                 }
6675                                 push @commit_spec, "-n";
6676                         }
6677                         push @commit_spec, '--root', $hash;
6678                 }
6679                 open $fd, "-|", git_cmd(), "format-patch", @diff_opts,
6680                         '--encoding=utf8', '--stdout', @commit_spec
6681                         or die_error(500, "Open git-format-patch failed");
6682         } else {
6683                 die_error(400, "Unknown commitdiff format");
6684         }
6685
6686         # non-textual hash id's can be cached
6687         my $expires;
6688         if ($hash =~ m/^[0-9a-fA-F]{40}$/) {
6689                 $expires = "+1d";
6690         }
6691
6692         # write commit message
6693         if ($format eq 'html') {
6694                 my $refs = git_get_references();
6695                 my $ref = format_ref_marker($refs, $co{'id'});
6696
6697                 git_header_html(undef, $expires);
6698                 git_print_page_nav('commitdiff','', $hash,$co{'tree'},$hash, $formats_nav);
6699                 git_print_header_div('commit', esc_html($co{'title'}) . $ref, $hash);
6700                 print "<div class=\"title_text\">\n" .
6701                       "<table class=\"object_header\">\n";
6702                 git_print_authorship_rows(\%co);
6703                 print "</table>".
6704                       "</div>\n";
6705                 print "<div class=\"page_body\">\n";
6706                 if (@{$co{'comment'}} > 1) {
6707                         print "<div class=\"log\">\n";
6708                         git_print_log($co{'comment'}, -final_empty_line=> 1, -remove_title => 1);
6709                         print "</div>\n"; # class="log"
6710                 }
6711
6712         } elsif ($format eq 'plain') {
6713                 my $refs = git_get_references("tags");
6714                 my $tagname = git_get_rev_name_tags($hash);
6715                 my $filename = basename($project) . "-$hash.patch";
6716
6717                 print $cgi->header(
6718                         -type => 'text/plain',
6719                         -charset => 'utf-8',
6720                         -expires => $expires,
6721                         -content_disposition => 'inline; filename="' . "$filename" . '"');
6722                 my %ad = parse_date($co{'author_epoch'}, $co{'author_tz'});
6723                 print "From: " . to_utf8($co{'author'}) . "\n";
6724                 print "Date: $ad{'rfc2822'} ($ad{'tz_local'})\n";
6725                 print "Subject: " . to_utf8($co{'title'}) . "\n";
6726
6727                 print "X-Git-Tag: $tagname\n" if $tagname;
6728                 print "X-Git-Url: " . $cgi->self_url() . "\n\n";
6729
6730                 foreach my $line (@{$co{'comment'}}) {
6731                         print to_utf8($line) . "\n";
6732                 }
6733                 print "---\n\n";
6734         } elsif ($format eq 'patch') {
6735                 my $filename = basename($project) . "-$hash.patch";
6736
6737                 print $cgi->header(
6738                         -type => 'text/plain',
6739                         -charset => 'utf-8',
6740                         -expires => $expires,
6741                         -content_disposition => 'inline; filename="' . "$filename" . '"');
6742         }
6743
6744         # write patch
6745         if ($format eq 'html') {
6746                 my $use_parents = !defined $hash_parent ||
6747                         $hash_parent eq '-c' || $hash_parent eq '--cc';
6748                 git_difftree_body(\@difftree, $hash,
6749                                   $use_parents ? @{$co{'parents'}} : $hash_parent);
6750                 print "<br/>\n";
6751
6752                 git_patchset_body($fd, \@difftree, $hash,
6753                                   $use_parents ? @{$co{'parents'}} : $hash_parent);
6754                 close $fd;
6755                 print "</div>\n"; # class="page_body"
6756                 git_footer_html();
6757
6758         } elsif ($format eq 'plain') {
6759                 local $/ = undef;
6760                 print <$fd>;
6761                 close $fd
6762                         or print "Reading git-diff-tree failed\n";
6763         } elsif ($format eq 'patch') {
6764                 local $/ = undef;
6765                 print <$fd>;
6766                 close $fd
6767                         or print "Reading git-format-patch failed\n";
6768         }
6769 }
6770
6771 sub git_commitdiff_plain {
6772         git_commitdiff(-format => 'plain');
6773 }
6774
6775 # format-patch-style patches
6776 sub git_patch {
6777         git_commitdiff(-format => 'patch', -single => 1);
6778 }
6779
6780 sub git_patches {
6781         git_commitdiff(-format => 'patch');
6782 }
6783
6784 sub git_history {
6785         git_log_generic('history', \&git_history_body,
6786                         $hash_base, $hash_parent_base,
6787                         $file_name, $hash);
6788 }
6789
6790 sub git_search {
6791         gitweb_check_feature('search') or die_error(403, "Search is disabled");
6792         if (!defined $searchtext) {
6793                 die_error(400, "Text field is empty");
6794         }
6795         if (!defined $hash) {
6796                 $hash = git_get_head_hash($project);
6797         }
6798         my %co = parse_commit($hash);
6799         if (!%co) {
6800                 die_error(404, "Unknown commit object");
6801         }
6802         if (!defined $page) {
6803                 $page = 0;
6804         }
6805
6806         $searchtype ||= 'commit';
6807         if ($searchtype eq 'pickaxe') {
6808                 # pickaxe may take all resources of your box and run for several minutes
6809                 # with every query - so decide by yourself how public you make this feature
6810                 gitweb_check_feature('pickaxe')
6811                     or die_error(403, "Pickaxe is disabled");
6812         }
6813         if ($searchtype eq 'grep') {
6814                 gitweb_check_feature('grep')
6815                     or die_error(403, "Grep is disabled");
6816         }
6817
6818         git_header_html();
6819
6820         if ($searchtype eq 'commit' or $searchtype eq 'author' or $searchtype eq 'committer') {
6821                 my $greptype;
6822                 if ($searchtype eq 'commit') {
6823                         $greptype = "--grep=";
6824                 } elsif ($searchtype eq 'author') {
6825                         $greptype = "--author=";
6826                 } elsif ($searchtype eq 'committer') {
6827                         $greptype = "--committer=";
6828                 }
6829                 $greptype .= $searchtext;
6830                 my @commitlist = parse_commits($hash, 101, (100 * $page), undef,
6831                                                $greptype, '--regexp-ignore-case',
6832                                                $search_use_regexp ? '--extended-regexp' : '--fixed-strings');
6833
6834                 my $paging_nav = '';
6835                 if ($page > 0) {
6836                         $paging_nav .=
6837                                 $cgi->a({-href => href(action=>"search", hash=>$hash,
6838                                                        searchtext=>$searchtext,
6839                                                        searchtype=>$searchtype)},
6840                                         "first");
6841                         $paging_nav .= " &sdot; " .
6842                                 $cgi->a({-href => href(-replay=>1, page=>$page-1),
6843                                          -accesskey => "p", -title => "Alt-p"}, "prev");
6844                 } else {
6845                         $paging_nav .= "first";
6846                         $paging_nav .= " &sdot; prev";
6847                 }
6848                 my $next_link = '';
6849                 if ($#commitlist >= 100) {
6850                         $next_link =
6851                                 $cgi->a({-href => href(-replay=>1, page=>$page+1),
6852                                          -accesskey => "n", -title => "Alt-n"}, "next");
6853                         $paging_nav .= " &sdot; $next_link";
6854                 } else {
6855                         $paging_nav .= " &sdot; next";
6856                 }
6857
6858                 git_print_page_nav('','', $hash,$co{'tree'},$hash, $paging_nav);
6859                 git_print_header_div('commit', esc_html($co{'title'}), $hash);
6860                 if ($page == 0 && !@commitlist) {
6861                         print "<p>No match.</p>\n";
6862                 } else {
6863                         git_search_grep_body(\@commitlist, 0, 99, $next_link);
6864                 }
6865         }
6866
6867         if ($searchtype eq 'pickaxe') {
6868                 git_print_page_nav('','', $hash,$co{'tree'},$hash);
6869                 git_print_header_div('commit', esc_html($co{'title'}), $hash);
6870
6871                 print "<table class=\"pickaxe search\">\n";
6872                 my $alternate = 1;
6873                 local $/ = "\n";
6874                 open my $fd, '-|', git_cmd(), '--no-pager', 'log', @diff_opts,
6875                         '--pretty=format:%H', '--no-abbrev', '--raw', "-S$searchtext",
6876                         ($search_use_regexp ? '--pickaxe-regex' : ());
6877                 undef %co;
6878                 my @files;
6879                 while (my $line = <$fd>) {
6880                         chomp $line;
6881                         next unless $line;
6882
6883                         my %set = parse_difftree_raw_line($line);
6884                         if (defined $set{'commit'}) {
6885                                 # finish previous commit
6886                                 if (%co) {
6887                                         print "</td>\n" .
6888                                               "<td class=\"link\">" .
6889                                               $cgi->a({-href => href(action=>"commit", hash=>$co{'id'})}, "commit") .
6890                                               " | " .
6891                                               $cgi->a({-href => href(action=>"tree", hash=>$co{'tree'}, hash_base=>$co{'id'})}, "tree");
6892                                         print "</td>\n" .
6893                                               "</tr>\n";
6894                                 }
6895
6896                                 if ($alternate) {
6897                                         print "<tr class=\"dark\">\n";
6898                                 } else {
6899                                         print "<tr class=\"light\">\n";
6900                                 }
6901                                 $alternate ^= 1;
6902                                 %co = parse_commit($set{'commit'});
6903                                 my $author = chop_and_escape_str($co{'author_name'}, 15, 5);
6904                                 print "<td title=\"$co{'age_string_age'}\"><i>$co{'age_string_date'}</i></td>\n" .
6905                                       "<td><i>$author</i></td>\n" .
6906                                       "<td>" .
6907                                       $cgi->a({-href => href(action=>"commit", hash=>$co{'id'}),
6908                                               -class => "list subject"},
6909                                               chop_and_escape_str($co{'title'}, 50) . "<br/>");
6910                         } elsif (defined $set{'to_id'}) {
6911                                 next if ($set{'to_id'} =~ m/^0{40}$/);
6912
6913                                 print $cgi->a({-href => href(action=>"blob", hash_base=>$co{'id'},
6914                                                              hash=>$set{'to_id'}, file_name=>$set{'to_file'}),
6915                                               -class => "list"},
6916                                               "<span class=\"match\">" . esc_path($set{'file'}) . "</span>") .
6917                                       "<br/>\n";
6918                         }
6919                 }
6920                 close $fd;
6921
6922                 # finish last commit (warning: repetition!)
6923                 if (%co) {
6924                         print "</td>\n" .
6925                               "<td class=\"link\">" .
6926                               $cgi->a({-href => href(action=>"commit", hash=>$co{'id'})}, "commit") .
6927                               " | " .
6928                               $cgi->a({-href => href(action=>"tree", hash=>$co{'tree'}, hash_base=>$co{'id'})}, "tree");
6929                         print "</td>\n" .
6930                               "</tr>\n";
6931                 }
6932
6933                 print "</table>\n";
6934         }
6935
6936         if ($searchtype eq 'grep') {
6937                 git_print_page_nav('','', $hash,$co{'tree'},$hash);
6938                 git_print_header_div('commit', esc_html($co{'title'}), $hash);
6939
6940                 print "<table class=\"grep_search\">\n";
6941                 my $alternate = 1;
6942                 my $matches = 0;
6943                 local $/ = "\n";
6944                 open my $fd, "-|", git_cmd(), 'grep', '-n',
6945                         $search_use_regexp ? ('-E', '-i') : '-F',
6946                         $searchtext, $co{'tree'};
6947                 my $lastfile = '';
6948                 while (my $line = <$fd>) {
6949                         chomp $line;
6950                         my ($file, $lno, $ltext, $binary);
6951                         last if ($matches++ > 1000);
6952                         if ($line =~ /^Binary file (.+) matches$/) {
6953                                 $file = $1;
6954                                 $binary = 1;
6955                         } else {
6956                                 (undef, $file, $lno, $ltext) = split(/:/, $line, 4);
6957                         }
6958                         if ($file ne $lastfile) {
6959                                 $lastfile and print "</td></tr>\n";
6960                                 if ($alternate++) {
6961                                         print "<tr class=\"dark\">\n";
6962                                 } else {
6963                                         print "<tr class=\"light\">\n";
6964                                 }
6965                                 print "<td class=\"list\">".
6966                                         $cgi->a({-href => href(action=>"blob", hash=>$co{'hash'},
6967                                                                file_name=>"$file"),
6968                                                 -class => "list"}, esc_path($file));
6969                                 print "</td><td>\n";
6970                                 $lastfile = $file;
6971                         }
6972                         if ($binary) {
6973                                 print "<div class=\"binary\">Binary file</div>\n";
6974                         } else {
6975                                 $ltext = untabify($ltext);
6976                                 if ($ltext =~ m/^(.*)($search_regexp)(.*)$/i) {
6977                                         $ltext = esc_html($1, -nbsp=>1);
6978                                         $ltext .= '<span class="match">';
6979                                         $ltext .= esc_html($2, -nbsp=>1);
6980                                         $ltext .= '</span>';
6981                                         $ltext .= esc_html($3, -nbsp=>1);
6982                                 } else {
6983                                         $ltext = esc_html($ltext, -nbsp=>1);
6984                                 }
6985                                 print "<div class=\"pre\">" .
6986                                         $cgi->a({-href => href(action=>"blob", hash=>$co{'hash'},
6987                                                                file_name=>"$file").'#l'.$lno,
6988                                                 -class => "linenr"}, sprintf('%4i', $lno))
6989                                         . ' ' .  $ltext . "</div>\n";
6990                         }
6991                 }
6992                 if ($lastfile) {
6993                         print "</td></tr>\n";
6994                         if ($matches > 1000) {
6995                                 print "<div class=\"diff nodifferences\">Too many matches, listing trimmed</div>\n";
6996                         }
6997                 } else {
6998                         print "<div class=\"diff nodifferences\">No matches found</div>\n";
6999                 }
7000                 close $fd;
7001
7002                 print "</table>\n";
7003         }
7004         git_footer_html();
7005 }
7006
7007 sub git_search_help {
7008         git_header_html();
7009         git_print_page_nav('','', $hash,$hash,$hash);
7010         print <<EOT;
7011 <p><strong>Pattern</strong> is by default a normal string that is matched precisely (but without
7012 regard to case, except in the case of pickaxe). However, when you check the <em>re</em> checkbox,
7013 the pattern entered is recognized as the POSIX extended
7014 <a href="http://en.wikipedia.org/wiki/Regular_expression">regular expression</a> (also case
7015 insensitive).</p>
7016 <dl>
7017 <dt><b>commit</b></dt>
7018 <dd>The commit messages and authorship information will be scanned for the given pattern.</dd>
7019 EOT
7020         my $have_grep = gitweb_check_feature('grep');
7021         if ($have_grep) {
7022                 print <<EOT;
7023 <dt><b>grep</b></dt>
7024 <dd>All files in the currently selected tree (HEAD unless you are explicitly browsing
7025     a different one) are searched for the given pattern. On large trees, this search can take
7026 a while and put some strain on the server, so please use it with some consideration. Note that
7027 due to git-grep peculiarity, currently if regexp mode is turned off, the matches are
7028 case-sensitive.</dd>
7029 EOT
7030         }
7031         print <<EOT;
7032 <dt><b>author</b></dt>
7033 <dd>Name and e-mail of the change author and date of birth of the patch will be scanned for the given pattern.</dd>
7034 <dt><b>committer</b></dt>
7035 <dd>Name and e-mail of the committer and date of commit will be scanned for the given pattern.</dd>
7036 EOT
7037         my $have_pickaxe = gitweb_check_feature('pickaxe');
7038         if ($have_pickaxe) {
7039                 print <<EOT;
7040 <dt><b>pickaxe</b></dt>
7041 <dd>All commits that caused the string to appear or disappear from any file (changes that
7042 added, removed or "modified" the string) will be listed. This search can take a while and
7043 takes a lot of strain on the server, so please use it wisely. Note that since you may be
7044 interested even in changes just changing the case as well, this search is case sensitive.</dd>
7045 EOT
7046         }
7047         print "</dl>\n";
7048         git_footer_html();
7049 }
7050
7051 sub git_shortlog {
7052         git_log_generic('shortlog', \&git_shortlog_body,
7053                         $hash, $hash_parent);
7054 }
7055
7056 ## ......................................................................
7057 ## feeds (RSS, Atom; OPML)
7058
7059 sub git_feed {
7060         my $format = shift || 'atom';
7061         my $have_blame = gitweb_check_feature('blame');
7062
7063         # Atom: http://www.atomenabled.org/developers/syndication/
7064         # RSS:  http://www.notestips.com/80256B3A007F2692/1/NAMO5P9UPQ
7065         if ($format ne 'rss' && $format ne 'atom') {
7066                 die_error(400, "Unknown web feed format");
7067         }
7068
7069         # log/feed of current (HEAD) branch, log of given branch, history of file/directory
7070         my $head = $hash || 'HEAD';
7071         my @commitlist = parse_commits($head, 150, 0, $file_name);
7072
7073         my %latest_commit;
7074         my %latest_date;
7075         my $content_type = "application/$format+xml";
7076         if (defined $cgi->http('HTTP_ACCEPT') &&
7077                  $cgi->Accept('text/xml') > $cgi->Accept($content_type)) {
7078                 # browser (feed reader) prefers text/xml
7079                 $content_type = 'text/xml';
7080         }
7081         if (defined($commitlist[0])) {
7082                 %latest_commit = %{$commitlist[0]};
7083                 my $latest_epoch = $latest_commit{'committer_epoch'};
7084                 %latest_date   = parse_date($latest_epoch, $latest_commit{'comitter_tz'});
7085                 my $if_modified = $cgi->http('IF_MODIFIED_SINCE');
7086                 if (defined $if_modified) {
7087                         my $since;
7088                         if (eval { require HTTP::Date; 1; }) {
7089                                 $since = HTTP::Date::str2time($if_modified);
7090                         } elsif (eval { require Time::ParseDate; 1; }) {
7091                                 $since = Time::ParseDate::parsedate($if_modified, GMT => 1);
7092                         }
7093                         if (defined $since && $latest_epoch <= $since) {
7094                                 print $cgi->header(
7095                                         -type => $content_type,
7096                                         -charset => 'utf-8',
7097                                         -last_modified => $latest_date{'rfc2822'},
7098                                         -status => '304 Not Modified');
7099                                 return;
7100                         }
7101                 }
7102                 print $cgi->header(
7103                         -type => $content_type,
7104                         -charset => 'utf-8',
7105                         -last_modified => $latest_date{'rfc2822'});
7106         } else {
7107                 print $cgi->header(
7108                         -type => $content_type,
7109                         -charset => 'utf-8');
7110         }
7111
7112         # Optimization: skip generating the body if client asks only
7113         # for Last-Modified date.
7114         return if ($cgi->request_method() eq 'HEAD');
7115
7116         # header variables
7117         my $title = "$site_name - $project/$action";
7118         my $feed_type = 'log';
7119         if (defined $hash) {
7120                 $title .= " - '$hash'";
7121                 $feed_type = 'branch log';
7122                 if (defined $file_name) {
7123                         $title .= " :: $file_name";
7124                         $feed_type = 'history';
7125                 }
7126         } elsif (defined $file_name) {
7127                 $title .= " - $file_name";
7128                 $feed_type = 'history';
7129         }
7130         $title .= " $feed_type";
7131         my $descr = git_get_project_description($project);
7132         if (defined $descr) {
7133                 $descr = esc_html($descr);
7134         } else {
7135                 $descr = "$project " .
7136                          ($format eq 'rss' ? 'RSS' : 'Atom') .
7137                          " feed";
7138         }
7139         my $owner = git_get_project_owner($project);
7140         $owner = esc_html($owner);
7141
7142         #header
7143         my $alt_url;
7144         if (defined $file_name) {
7145                 $alt_url = href(-full=>1, action=>"history", hash=>$hash, file_name=>$file_name);
7146         } elsif (defined $hash) {
7147                 $alt_url = href(-full=>1, action=>"log", hash=>$hash);
7148         } else {
7149                 $alt_url = href(-full=>1, action=>"summary");
7150         }
7151         print qq!<?xml version="1.0" encoding="utf-8"?>\n!;
7152         if ($format eq 'rss') {
7153                 print <<XML;
7154 <rss version="2.0" xmlns:content="http://purl.org/rss/1.0/modules/content/">
7155 <channel>
7156 XML
7157                 print "<title>$title</title>\n" .
7158                       "<link>$alt_url</link>\n" .
7159                       "<description>$descr</description>\n" .
7160                       "<language>en</language>\n" .
7161                       # project owner is responsible for 'editorial' content
7162                       "<managingEditor>$owner</managingEditor>\n";
7163                 if (defined $logo || defined $favicon) {
7164                         # prefer the logo to the favicon, since RSS
7165                         # doesn't allow both
7166                         my $img = esc_url($logo || $favicon);
7167                         print "<image>\n" .
7168                               "<url>$img</url>\n" .
7169                               "<title>$title</title>\n" .
7170                               "<link>$alt_url</link>\n" .
7171                               "</image>\n";
7172                 }
7173                 if (%latest_date) {
7174                         print "<pubDate>$latest_date{'rfc2822'}</pubDate>\n";
7175                         print "<lastBuildDate>$latest_date{'rfc2822'}</lastBuildDate>\n";
7176                 }
7177                 print "<generator>gitweb v.$version/$git_version</generator>\n";
7178         } elsif ($format eq 'atom') {
7179                 print <<XML;
7180 <feed xmlns="http://www.w3.org/2005/Atom">
7181 XML
7182                 print "<title>$title</title>\n" .
7183                       "<subtitle>$descr</subtitle>\n" .
7184                       '<link rel="alternate" type="text/html" href="' .
7185                       $alt_url . '" />' . "\n" .
7186                       '<link rel="self" type="' . $content_type . '" href="' .
7187                       $cgi->self_url() . '" />' . "\n" .
7188                       "<id>" . href(-full=>1) . "</id>\n" .
7189                       # use project owner for feed author
7190                       "<author><name>$owner</name></author>\n";
7191                 if (defined $favicon) {
7192                         print "<icon>" . esc_url($favicon) . "</icon>\n";
7193                 }
7194                 if (defined $logo) {
7195                         # not twice as wide as tall: 72 x 27 pixels
7196                         print "<logo>" . esc_url($logo) . "</logo>\n";
7197                 }
7198                 if (! %latest_date) {
7199                         # dummy date to keep the feed valid until commits trickle in:
7200                         print "<updated>1970-01-01T00:00:00Z</updated>\n";
7201                 } else {
7202                         print "<updated>$latest_date{'iso-8601'}</updated>\n";
7203                 }
7204                 print "<generator version='$version/$git_version'>gitweb</generator>\n";
7205         }
7206
7207         # contents
7208         for (my $i = 0; $i <= $#commitlist; $i++) {
7209                 my %co = %{$commitlist[$i]};
7210                 my $commit = $co{'id'};
7211                 # we read 150, we always show 30 and the ones more recent than 48 hours
7212                 if (($i >= 20) && ((time - $co{'author_epoch'}) > 48*60*60)) {
7213                         last;
7214                 }
7215                 my %cd = parse_date($co{'author_epoch'}, $co{'author_tz'});
7216
7217                 # get list of changed files
7218                 open my $fd, "-|", git_cmd(), "diff-tree", '-r', @diff_opts,
7219                         $co{'parent'} || "--root",
7220                         $co{'id'}, "--", (defined $file_name ? $file_name : ())
7221                         or next;
7222                 my @difftree = map { chomp; $_ } <$fd>;
7223                 close $fd
7224                         or next;
7225
7226                 # print element (entry, item)
7227                 my $co_url = href(-full=>1, action=>"commitdiff", hash=>$commit);
7228                 if ($format eq 'rss') {
7229                         print "<item>\n" .
7230                               "<title>" . esc_html($co{'title'}) . "</title>\n" .
7231                               "<author>" . esc_html($co{'author'}) . "</author>\n" .
7232                               "<pubDate>$cd{'rfc2822'}</pubDate>\n" .
7233                               "<guid isPermaLink=\"true\">$co_url</guid>\n" .
7234                               "<link>$co_url</link>\n" .
7235                               "<description>" . esc_html($co{'title'}) . "</description>\n" .
7236                               "<content:encoded>" .
7237                               "<![CDATA[\n";
7238                 } elsif ($format eq 'atom') {
7239                         print "<entry>\n" .
7240                               "<title type=\"html\">" . esc_html($co{'title'}) . "</title>\n" .
7241                               "<updated>$cd{'iso-8601'}</updated>\n" .
7242                               "<author>\n" .
7243                               "  <name>" . esc_html($co{'author_name'}) . "</name>\n";
7244                         if ($co{'author_email'}) {
7245                                 print "  <email>" . esc_html($co{'author_email'}) . "</email>\n";
7246                         }
7247                         print "</author>\n" .
7248                               # use committer for contributor
7249                               "<contributor>\n" .
7250                               "  <name>" . esc_html($co{'committer_name'}) . "</name>\n";
7251                         if ($co{'committer_email'}) {
7252                                 print "  <email>" . esc_html($co{'committer_email'}) . "</email>\n";
7253                         }
7254                         print "</contributor>\n" .
7255                               "<published>$cd{'iso-8601'}</published>\n" .
7256                               "<link rel=\"alternate\" type=\"text/html\" href=\"$co_url\" />\n" .
7257                               "<id>$co_url</id>\n" .
7258                               "<content type=\"xhtml\" xml:base=\"" . esc_url($my_url) . "\">\n" .
7259                               "<div xmlns=\"http://www.w3.org/1999/xhtml\">\n";
7260                 }
7261                 my $comment = $co{'comment'};
7262                 print "<pre>\n";
7263                 foreach my $line (@$comment) {
7264                         $line = esc_html($line);
7265                         print "$line\n";
7266                 }
7267                 print "</pre><ul>\n";
7268                 foreach my $difftree_line (@difftree) {
7269                         my %difftree = parse_difftree_raw_line($difftree_line);
7270                         next if !$difftree{'from_id'};
7271
7272                         my $file = $difftree{'file'} || $difftree{'to_file'};
7273
7274                         print "<li>" .
7275                               "[" .
7276                               $cgi->a({-href => href(-full=>1, action=>"blobdiff",
7277                                                      hash=>$difftree{'to_id'}, hash_parent=>$difftree{'from_id'},
7278                                                      hash_base=>$co{'id'}, hash_parent_base=>$co{'parent'},
7279                                                      file_name=>$file, file_parent=>$difftree{'from_file'}),
7280                                       -title => "diff"}, 'D');
7281                         if ($have_blame) {
7282                                 print $cgi->a({-href => href(-full=>1, action=>"blame",
7283                                                              file_name=>$file, hash_base=>$commit),
7284                                               -title => "blame"}, 'B');
7285                         }
7286                         # if this is not a feed of a file history
7287                         if (!defined $file_name || $file_name ne $file) {
7288                                 print $cgi->a({-href => href(-full=>1, action=>"history",
7289                                                              file_name=>$file, hash=>$commit),
7290                                               -title => "history"}, 'H');
7291                         }
7292                         $file = esc_path($file);
7293                         print "] ".
7294                               "$file</li>\n";
7295                 }
7296                 if ($format eq 'rss') {
7297                         print "</ul>]]>\n" .
7298                               "</content:encoded>\n" .
7299                               "</item>\n";
7300                 } elsif ($format eq 'atom') {
7301                         print "</ul>\n</div>\n" .
7302                               "</content>\n" .
7303                               "</entry>\n";
7304                 }
7305         }
7306
7307         # end of feed
7308         if ($format eq 'rss') {
7309                 print "</channel>\n</rss>\n";
7310         } elsif ($format eq 'atom') {
7311                 print "</feed>\n";
7312         }
7313 }
7314
7315 sub git_rss {
7316         git_feed('rss');
7317 }
7318
7319 sub git_atom {
7320         git_feed('atom');
7321 }
7322
7323 sub git_opml {
7324         my @list = git_get_projects_list();
7325
7326         print $cgi->header(
7327                 -type => 'text/xml',
7328                 -charset => 'utf-8',
7329                 -content_disposition => 'inline; filename="opml.xml"');
7330
7331         print <<XML;
7332 <?xml version="1.0" encoding="utf-8"?>
7333 <opml version="1.0">
7334 <head>
7335   <title>$site_name OPML Export</title>
7336 </head>
7337 <body>
7338 <outline text="git RSS feeds">
7339 XML
7340
7341         foreach my $pr (@list) {
7342                 my %proj = %$pr;
7343                 my $head = git_get_head_hash($proj{'path'});
7344                 if (!defined $head) {
7345                         next;
7346                 }
7347                 $git_dir = "$projectroot/$proj{'path'}";
7348                 my %co = parse_commit($head);
7349                 if (!%co) {
7350                         next;
7351                 }
7352
7353                 my $path = esc_html(chop_str($proj{'path'}, 25, 5));
7354                 my $rss  = href('project' => $proj{'path'}, 'action' => 'rss', -full => 1);
7355                 my $html = href('project' => $proj{'path'}, 'action' => 'summary', -full => 1);
7356                 print "<outline type=\"rss\" text=\"$path\" title=\"$path\" xmlUrl=\"$rss\" htmlUrl=\"$html\"/>\n";
7357         }
7358         print <<XML;
7359 </outline>
7360 </body>
7361 </opml>
7362 XML
7363 }