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 = shift || '';
2655         my @list;
2656
2657         $filter =~ s/\.git$//;
2658
2659         if (-d $projects_list) {
2660                 # search in directory
2661                 my $dir = $projects_list;
2662                 # remove the trailing "/"
2663                 $dir =~ s!/+$!!;
2664                 my $pfxlen = length("$dir");
2665                 my $pfxdepth = ($dir =~ tr!/!!);
2666                 # when filtering, search only given subdirectory
2667                 if ($filter) {
2668                         $dir .= "/$filter";
2669                         $dir =~ s!/+$!!;
2670                 }
2671
2672                 File::Find::find({
2673                         follow_fast => 1, # follow symbolic links
2674                         follow_skip => 2, # ignore duplicates
2675                         dangling_symlinks => 0, # ignore dangling symlinks, silently
2676                         wanted => sub {
2677                                 # global variables
2678                                 our $project_maxdepth;
2679                                 our $projectroot;
2680                                 # skip project-list toplevel, if we get it.
2681                                 return if (m!^[/.]$!);
2682                                 # only directories can be git repositories
2683                                 return unless (-d $_);
2684                                 # don't traverse too deep (Find is super slow on os x)
2685                                 # $project_maxdepth excludes depth of $projectroot
2686                                 if (($File::Find::name =~ tr!/!!) - $pfxdepth > $project_maxdepth) {
2687                                         $File::Find::prune = 1;
2688                                         return;
2689                                 }
2690
2691                                 my $path = substr($File::Find::name, $pfxlen + 1);
2692                                 # we check related file in $projectroot
2693                                 if (check_export_ok("$projectroot/$path")) {
2694                                         push @list, { path => $path };
2695                                         $File::Find::prune = 1;
2696                                 }
2697                         },
2698                 }, "$dir");
2699
2700         } elsif (-f $projects_list) {
2701                 # read from file(url-encoded):
2702                 # 'git%2Fgit.git Linus+Torvalds'
2703                 # 'libs%2Fklibc%2Fklibc.git H.+Peter+Anvin'
2704                 # 'linux%2Fhotplug%2Fudev.git Greg+Kroah-Hartman'
2705                 open my $fd, '<', $projects_list or return;
2706         PROJECT:
2707                 while (my $line = <$fd>) {
2708                         chomp $line;
2709                         my ($path, $owner) = split ' ', $line;
2710                         $path = unescape($path);
2711                         $owner = unescape($owner);
2712                         if (!defined $path) {
2713                                 next;
2714                         }
2715                         # if $filter is rpovided, check if $path begins with $filter
2716                         if ($filter && $path !~ m!^\Q$filter\E/!) {
2717                                 next;
2718                         }
2719                         if (check_export_ok("$projectroot/$path")) {
2720                                 my $pr = {
2721                                         path => $path,
2722                                         owner => to_utf8($owner),
2723                                 };
2724                                 push @list, $pr;
2725                         }
2726                 }
2727                 close $fd;
2728         }
2729         return @list;
2730 }
2731
2732 # written with help of Tree::Trie module (Perl Artistic License, GPL compatibile)
2733 # as side effects it sets 'forks' field to list of forks for forked projects
2734 sub filter_forks_from_projects_list {
2735         my $projects = shift;
2736
2737         my %trie; # prefix tree of directories (path components)
2738         # generate trie out of those directories that might contain forks
2739         foreach my $pr (@$projects) {
2740                 my $path = $pr->{'path'};
2741                 $path =~ s/\.git$//;      # forks of 'repo.git' are in 'repo/' directory
2742                 next if ($path =~ m!/$!); # skip non-bare repositories, e.g. 'repo/.git'
2743                 next unless ($path);      # skip '.git' repository: tests, git-instaweb
2744                 next unless (-d $path);   # containing directory exists
2745                 $pr->{'forks'} = [];      # there can be 0 or more forks of project
2746
2747                 # add to trie
2748                 my @dirs = split('/', $path);
2749                 # walk the trie, until either runs out of components or out of trie
2750                 my $ref = \%trie;
2751                 while (scalar @dirs &&
2752                        exists($ref->{$dirs[0]})) {
2753                         $ref = $ref->{shift @dirs};
2754                 }
2755                 # create rest of trie structure from rest of components
2756                 foreach my $dir (@dirs) {
2757                         $ref = $ref->{$dir} = {};
2758                 }
2759                 # create end marker, store $pr as a data
2760                 $ref->{''} = $pr if (!exists $ref->{''});
2761         }
2762
2763         # filter out forks, by finding shortest prefix match for paths
2764         my @filtered;
2765  PROJECT:
2766         foreach my $pr (@$projects) {
2767                 # trie lookup
2768                 my $ref = \%trie;
2769         DIR:
2770                 foreach my $dir (split('/', $pr->{'path'})) {
2771                         if (exists $ref->{''}) {
2772                                 # found [shortest] prefix, is a fork - skip it
2773                                 push @{$ref->{''}{'forks'}}, $pr;
2774                                 next PROJECT;
2775                         }
2776                         if (!exists $ref->{$dir}) {
2777                                 # not in trie, cannot have prefix, not a fork
2778                                 push @filtered, $pr;
2779                                 next PROJECT;
2780                         }
2781                         # If the dir is there, we just walk one step down the trie.
2782                         $ref = $ref->{$dir};
2783                 }
2784                 # we ran out of trie
2785                 # (shouldn't happen: it's either no match, or end marker)
2786                 push @filtered, $pr;
2787         }
2788
2789         return @filtered;
2790 }
2791
2792 # note: fill_project_list_info must be run first,
2793 # for 'descr_long' and 'ctags' to be filled
2794 sub search_projects_list {
2795         my ($projlist, %opts) = @_;
2796         my $tagfilter  = $opts{'tagfilter'};
2797         my $searchtext = $opts{'searchtext'};
2798
2799         return @$projlist
2800                 unless ($tagfilter || $searchtext);
2801
2802         my @projects;
2803  PROJECT:
2804         foreach my $pr (@$projlist) {
2805
2806                 if ($tagfilter) {
2807                         next unless ref($pr->{'ctags'}) eq 'HASH';
2808                         next unless
2809                                 grep { lc($_) eq lc($tagfilter) } keys %{$pr->{'ctags'}};
2810                 }
2811
2812                 if ($searchtext) {
2813                         next unless
2814                                 $pr->{'path'} =~ /$searchtext/ ||
2815                                 $pr->{'descr_long'} =~ /$searchtext/;
2816                 }
2817
2818                 push @projects, $pr;
2819         }
2820
2821         return @projects;
2822 }
2823
2824 our $gitweb_project_owner = undef;
2825 sub git_get_project_list_from_file {
2826
2827         return if (defined $gitweb_project_owner);
2828
2829         $gitweb_project_owner = {};
2830         # read from file (url-encoded):
2831         # 'git%2Fgit.git Linus+Torvalds'
2832         # 'libs%2Fklibc%2Fklibc.git H.+Peter+Anvin'
2833         # 'linux%2Fhotplug%2Fudev.git Greg+Kroah-Hartman'
2834         if (-f $projects_list) {
2835                 open(my $fd, '<', $projects_list);
2836                 while (my $line = <$fd>) {
2837                         chomp $line;
2838                         my ($pr, $ow) = split ' ', $line;
2839                         $pr = unescape($pr);
2840                         $ow = unescape($ow);
2841                         $gitweb_project_owner->{$pr} = to_utf8($ow);
2842                 }
2843                 close $fd;
2844         }
2845 }
2846
2847 sub git_get_project_owner {
2848         my $project = shift;
2849         my $owner;
2850
2851         return undef unless $project;
2852         $git_dir = "$projectroot/$project";
2853
2854         if (!defined $gitweb_project_owner) {
2855                 git_get_project_list_from_file();
2856         }
2857
2858         if (exists $gitweb_project_owner->{$project}) {
2859                 $owner = $gitweb_project_owner->{$project};
2860         }
2861         if (!defined $owner){
2862                 $owner = git_get_project_config('owner');
2863         }
2864         if (!defined $owner) {
2865                 $owner = get_file_owner("$git_dir");
2866         }
2867
2868         return $owner;
2869 }
2870
2871 sub git_get_last_activity {
2872         my ($path) = @_;
2873         my $fd;
2874
2875         $git_dir = "$projectroot/$path";
2876         open($fd, "-|", git_cmd(), 'for-each-ref',
2877              '--format=%(committer)',
2878              '--sort=-committerdate',
2879              '--count=1',
2880              'refs/heads') or return;
2881         my $most_recent = <$fd>;
2882         close $fd or return;
2883         if (defined $most_recent &&
2884             $most_recent =~ / (\d+) [-+][01]\d\d\d$/) {
2885                 my $timestamp = $1;
2886                 my $age = time - $timestamp;
2887                 return ($age, age_string($age));
2888         }
2889         return (undef, undef);
2890 }
2891
2892 # Implementation note: when a single remote is wanted, we cannot use 'git
2893 # remote show -n' because that command always work (assuming it's a remote URL
2894 # if it's not defined), and we cannot use 'git remote show' because that would
2895 # try to make a network roundtrip. So the only way to find if that particular
2896 # remote is defined is to walk the list provided by 'git remote -v' and stop if
2897 # and when we find what we want.
2898 sub git_get_remotes_list {
2899         my $wanted = shift;
2900         my %remotes = ();
2901
2902         open my $fd, '-|' , git_cmd(), 'remote', '-v';
2903         return unless $fd;
2904         while (my $remote = <$fd>) {
2905                 chomp $remote;
2906                 $remote =~ s!\t(.*?)\s+\((\w+)\)$!!;
2907                 next if $wanted and not $remote eq $wanted;
2908                 my ($url, $key) = ($1, $2);
2909
2910                 $remotes{$remote} ||= { 'heads' => () };
2911                 $remotes{$remote}{$key} = $url;
2912         }
2913         close $fd or return;
2914         return wantarray ? %remotes : \%remotes;
2915 }
2916
2917 # Takes a hash of remotes as first parameter and fills it by adding the
2918 # available remote heads for each of the indicated remotes.
2919 sub fill_remote_heads {
2920         my $remotes = shift;
2921         my @heads = map { "remotes/$_" } keys %$remotes;
2922         my @remoteheads = git_get_heads_list(undef, @heads);
2923         foreach my $remote (keys %$remotes) {
2924                 $remotes->{$remote}{'heads'} = [ grep {
2925                         $_->{'name'} =~ s!^$remote/!!
2926                         } @remoteheads ];
2927         }
2928 }
2929
2930 sub git_get_references {
2931         my $type = shift || "";
2932         my %refs;
2933         # 5dc01c595e6c6ec9ccda4f6f69c131c0dd945f8c refs/tags/v2.6.11
2934         # c39ae07f393806ccf406ef966e9a15afc43cc36a refs/tags/v2.6.11^{}
2935         open my $fd, "-|", git_cmd(), "show-ref", "--dereference",
2936                 ($type ? ("--", "refs/$type") : ()) # use -- <pattern> if $type
2937                 or return;
2938
2939         while (my $line = <$fd>) {
2940                 chomp $line;
2941                 if ($line =~ m!^([0-9a-fA-F]{40})\srefs/($type.*)$!) {
2942                         if (defined $refs{$1}) {
2943                                 push @{$refs{$1}}, $2;
2944                         } else {
2945                                 $refs{$1} = [ $2 ];
2946                         }
2947                 }
2948         }
2949         close $fd or return;
2950         return \%refs;
2951 }
2952
2953 sub git_get_rev_name_tags {
2954         my $hash = shift || return undef;
2955
2956         open my $fd, "-|", git_cmd(), "name-rev", "--tags", $hash
2957                 or return;
2958         my $name_rev = <$fd>;
2959         close $fd;
2960
2961         if ($name_rev =~ m|^$hash tags/(.*)$|) {
2962                 return $1;
2963         } else {
2964                 # catches also '$hash undefined' output
2965                 return undef;
2966         }
2967 }
2968
2969 ## ----------------------------------------------------------------------
2970 ## parse to hash functions
2971
2972 sub parse_date {
2973         my $epoch = shift;
2974         my $tz = shift || "-0000";
2975
2976         my %date;
2977         my @months = ("Jan", "Feb", "Mar", "Apr", "May", "Jun", "Jul", "Aug", "Sep", "Oct", "Nov", "Dec");
2978         my @days = ("Sun", "Mon", "Tue", "Wed", "Thu", "Fri", "Sat");
2979         my ($sec, $min, $hour, $mday, $mon, $year, $wday, $yday) = gmtime($epoch);
2980         $date{'hour'} = $hour;
2981         $date{'minute'} = $min;
2982         $date{'mday'} = $mday;
2983         $date{'day'} = $days[$wday];
2984         $date{'month'} = $months[$mon];
2985         $date{'rfc2822'}   = sprintf "%s, %d %s %4d %02d:%02d:%02d +0000",
2986                              $days[$wday], $mday, $months[$mon], 1900+$year, $hour ,$min, $sec;
2987         $date{'mday-time'} = sprintf "%d %s %02d:%02d",
2988                              $mday, $months[$mon], $hour ,$min;
2989         $date{'iso-8601'}  = sprintf "%04d-%02d-%02dT%02d:%02d:%02dZ",
2990                              1900+$year, 1+$mon, $mday, $hour ,$min, $sec;
2991
2992         my ($tz_sign, $tz_hour, $tz_min) =
2993                 ($tz =~ m/^([-+])(\d\d)(\d\d)$/);
2994         $tz_sign = ($tz_sign eq '-' ? -1 : +1);
2995         my $local = $epoch + $tz_sign*((($tz_hour*60) + $tz_min)*60);
2996         ($sec, $min, $hour, $mday, $mon, $year, $wday, $yday) = gmtime($local);
2997         $date{'hour_local'} = $hour;
2998         $date{'minute_local'} = $min;
2999         $date{'tz_local'} = $tz;
3000         $date{'iso-tz'} = sprintf("%04d-%02d-%02d %02d:%02d:%02d %s",
3001                                   1900+$year, $mon+1, $mday,
3002                                   $hour, $min, $sec, $tz);
3003         return %date;
3004 }
3005
3006 sub parse_tag {
3007         my $tag_id = shift;
3008         my %tag;
3009         my @comment;
3010
3011         open my $fd, "-|", git_cmd(), "cat-file", "tag", $tag_id or return;
3012         $tag{'id'} = $tag_id;
3013         while (my $line = <$fd>) {
3014                 chomp $line;
3015                 if ($line =~ m/^object ([0-9a-fA-F]{40})$/) {
3016                         $tag{'object'} = $1;
3017                 } elsif ($line =~ m/^type (.+)$/) {
3018                         $tag{'type'} = $1;
3019                 } elsif ($line =~ m/^tag (.+)$/) {
3020                         $tag{'name'} = $1;
3021                 } elsif ($line =~ m/^tagger (.*) ([0-9]+) (.*)$/) {
3022                         $tag{'author'} = $1;
3023                         $tag{'author_epoch'} = $2;
3024                         $tag{'author_tz'} = $3;
3025                         if ($tag{'author'} =~ m/^([^<]+) <([^>]*)>/) {
3026                                 $tag{'author_name'}  = $1;
3027                                 $tag{'author_email'} = $2;
3028                         } else {
3029                                 $tag{'author_name'} = $tag{'author'};
3030                         }
3031                 } elsif ($line =~ m/--BEGIN/) {
3032                         push @comment, $line;
3033                         last;
3034                 } elsif ($line eq "") {
3035                         last;
3036                 }
3037         }
3038         push @comment, <$fd>;
3039         $tag{'comment'} = \@comment;
3040         close $fd or return;
3041         if (!defined $tag{'name'}) {
3042                 return
3043         };
3044         return %tag
3045 }
3046
3047 sub parse_commit_text {
3048         my ($commit_text, $withparents) = @_;
3049         my @commit_lines = split '\n', $commit_text;
3050         my %co;
3051
3052         pop @commit_lines; # Remove '\0'
3053
3054         if (! @commit_lines) {
3055                 return;
3056         }
3057
3058         my $header = shift @commit_lines;
3059         if ($header !~ m/^[0-9a-fA-F]{40}/) {
3060                 return;
3061         }
3062         ($co{'id'}, my @parents) = split ' ', $header;
3063         while (my $line = shift @commit_lines) {
3064                 last if $line eq "\n";
3065                 if ($line =~ m/^tree ([0-9a-fA-F]{40})$/) {
3066                         $co{'tree'} = $1;
3067                 } elsif ((!defined $withparents) && ($line =~ m/^parent ([0-9a-fA-F]{40})$/)) {
3068                         push @parents, $1;
3069                 } elsif ($line =~ m/^author (.*) ([0-9]+) (.*)$/) {
3070                         $co{'author'} = to_utf8($1);
3071                         $co{'author_epoch'} = $2;
3072                         $co{'author_tz'} = $3;
3073                         if ($co{'author'} =~ m/^([^<]+) <([^>]*)>/) {
3074                                 $co{'author_name'}  = $1;
3075                                 $co{'author_email'} = $2;
3076                         } else {
3077                                 $co{'author_name'} = $co{'author'};
3078                         }
3079                 } elsif ($line =~ m/^committer (.*) ([0-9]+) (.*)$/) {
3080                         $co{'committer'} = to_utf8($1);
3081                         $co{'committer_epoch'} = $2;
3082                         $co{'committer_tz'} = $3;
3083                         if ($co{'committer'} =~ m/^([^<]+) <([^>]*)>/) {
3084                                 $co{'committer_name'}  = $1;
3085                                 $co{'committer_email'} = $2;
3086                         } else {
3087                                 $co{'committer_name'} = $co{'committer'};
3088                         }
3089                 }
3090         }
3091         if (!defined $co{'tree'}) {
3092                 return;
3093         };
3094         $co{'parents'} = \@parents;
3095         $co{'parent'} = $parents[0];
3096
3097         foreach my $title (@commit_lines) {
3098                 $title =~ s/^    //;
3099                 if ($title ne "") {
3100                         $co{'title'} = chop_str($title, 80, 5);
3101                         # remove leading stuff of merges to make the interesting part visible
3102                         if (length($title) > 50) {
3103                                 $title =~ s/^Automatic //;
3104                                 $title =~ s/^merge (of|with) /Merge ... /i;
3105                                 if (length($title) > 50) {
3106                                         $title =~ s/(http|rsync):\/\///;
3107                                 }
3108                                 if (length($title) > 50) {
3109                                         $title =~ s/(master|www|rsync)\.//;
3110                                 }
3111                                 if (length($title) > 50) {
3112                                         $title =~ s/kernel.org:?//;
3113                                 }
3114                                 if (length($title) > 50) {
3115                                         $title =~ s/\/pub\/scm//;
3116                                 }
3117                         }
3118                         $co{'title_short'} = chop_str($title, 50, 5);
3119                         last;
3120                 }
3121         }
3122         if (! defined $co{'title'} || $co{'title'} eq "") {
3123                 $co{'title'} = $co{'title_short'} = '(no commit message)';
3124         }
3125         # remove added spaces
3126         foreach my $line (@commit_lines) {
3127                 $line =~ s/^    //;
3128         }
3129         $co{'comment'} = \@commit_lines;
3130
3131         my $age = time - $co{'committer_epoch'};
3132         $co{'age'} = $age;
3133         $co{'age_string'} = age_string($age);
3134         my ($sec, $min, $hour, $mday, $mon, $year, $wday, $yday) = gmtime($co{'committer_epoch'});
3135         if ($age > 60*60*24*7*2) {
3136                 $co{'age_string_date'} = sprintf "%4i-%02u-%02i", 1900 + $year, $mon+1, $mday;
3137                 $co{'age_string_age'} = $co{'age_string'};
3138         } else {
3139                 $co{'age_string_date'} = $co{'age_string'};
3140                 $co{'age_string_age'} = sprintf "%4i-%02u-%02i", 1900 + $year, $mon+1, $mday;
3141         }
3142         return %co;
3143 }
3144
3145 sub parse_commit {
3146         my ($commit_id) = @_;
3147         my %co;
3148
3149         local $/ = "\0";
3150
3151         open my $fd, "-|", git_cmd(), "rev-list",
3152                 "--parents",
3153                 "--header",
3154                 "--max-count=1",
3155                 $commit_id,
3156                 "--",
3157                 or die_error(500, "Open git-rev-list failed");
3158         %co = parse_commit_text(<$fd>, 1);
3159         close $fd;
3160
3161         return %co;
3162 }
3163
3164 sub parse_commits {
3165         my ($commit_id, $maxcount, $skip, $filename, @args) = @_;
3166         my @cos;
3167
3168         $maxcount ||= 1;
3169         $skip ||= 0;
3170
3171         local $/ = "\0";
3172
3173         open my $fd, "-|", git_cmd(), "rev-list",
3174                 "--header",
3175                 @args,
3176                 ("--max-count=" . $maxcount),
3177                 ("--skip=" . $skip),
3178                 @extra_options,
3179                 $commit_id,
3180                 "--",
3181                 ($filename ? ($filename) : ())
3182                 or die_error(500, "Open git-rev-list failed");
3183         while (my $line = <$fd>) {
3184                 my %co = parse_commit_text($line);
3185                 push @cos, \%co;
3186         }
3187         close $fd;
3188
3189         return wantarray ? @cos : \@cos;
3190 }
3191
3192 # parse line of git-diff-tree "raw" output
3193 sub parse_difftree_raw_line {
3194         my $line = shift;
3195         my %res;
3196
3197         # ':100644 100644 03b218260e99b78c6df0ed378e59ed9205ccc96d 3b93d5e7cc7f7dd4ebed13a5cc1a4ad976fc94d8 M   ls-files.c'
3198         # ':100644 100644 7f9281985086971d3877aca27704f2aaf9c448ce bc190ebc71bbd923f2b728e505408f5e54bd073a M   rev-tree.c'
3199         if ($line =~ m/^:([0-7]{6}) ([0-7]{6}) ([0-9a-fA-F]{40}) ([0-9a-fA-F]{40}) (.)([0-9]{0,3})\t(.*)$/) {
3200                 $res{'from_mode'} = $1;
3201                 $res{'to_mode'} = $2;
3202                 $res{'from_id'} = $3;
3203                 $res{'to_id'} = $4;
3204                 $res{'status'} = $5;
3205                 $res{'similarity'} = $6;
3206                 if ($res{'status'} eq 'R' || $res{'status'} eq 'C') { # renamed or copied
3207                         ($res{'from_file'}, $res{'to_file'}) = map { unquote($_) } split("\t", $7);
3208                 } else {
3209                         $res{'from_file'} = $res{'to_file'} = $res{'file'} = unquote($7);
3210                 }
3211         }
3212         # '::100755 100755 100755 60e79ca1b01bc8b057abe17ddab484699a7f5fdb 94067cc5f73388f33722d52ae02f44692bc07490 94067cc5f73388f33722d52ae02f44692bc07490 MR git-gui/git-gui.sh'
3213         # combined diff (for merge commit)
3214         elsif ($line =~ s/^(::+)((?:[0-7]{6} )+)((?:[0-9a-fA-F]{40} )+)([a-zA-Z]+)\t(.*)$//) {
3215                 $res{'nparents'}  = length($1);
3216                 $res{'from_mode'} = [ split(' ', $2) ];
3217                 $res{'to_mode'} = pop @{$res{'from_mode'}};
3218                 $res{'from_id'} = [ split(' ', $3) ];
3219                 $res{'to_id'} = pop @{$res{'from_id'}};
3220                 $res{'status'} = [ split('', $4) ];
3221                 $res{'to_file'} = unquote($5);
3222         }
3223         # 'c512b523472485aef4fff9e57b229d9d243c967f'
3224         elsif ($line =~ m/^([0-9a-fA-F]{40})$/) {
3225                 $res{'commit'} = $1;
3226         }
3227
3228         return wantarray ? %res : \%res;
3229 }
3230
3231 # wrapper: return parsed line of git-diff-tree "raw" output
3232 # (the argument might be raw line, or parsed info)
3233 sub parsed_difftree_line {
3234         my $line_or_ref = shift;
3235
3236         if (ref($line_or_ref) eq "HASH") {
3237                 # pre-parsed (or generated by hand)
3238                 return $line_or_ref;
3239         } else {
3240                 return parse_difftree_raw_line($line_or_ref);
3241         }
3242 }
3243
3244 # parse line of git-ls-tree output
3245 sub parse_ls_tree_line {
3246         my $line = shift;
3247         my %opts = @_;
3248         my %res;
3249
3250         if ($opts{'-l'}) {
3251                 #'100644 blob 0fa3f3a66fb6a137f6ec2c19351ed4d807070ffa   16717  panic.c'
3252                 $line =~ m/^([0-9]+) (.+) ([0-9a-fA-F]{40}) +(-|[0-9]+)\t(.+)$/s;
3253
3254                 $res{'mode'} = $1;
3255                 $res{'type'} = $2;
3256                 $res{'hash'} = $3;
3257                 $res{'size'} = $4;
3258                 if ($opts{'-z'}) {
3259                         $res{'name'} = $5;
3260                 } else {
3261                         $res{'name'} = unquote($5);
3262                 }
3263         } else {
3264                 #'100644 blob 0fa3f3a66fb6a137f6ec2c19351ed4d807070ffa  panic.c'
3265                 $line =~ m/^([0-9]+) (.+) ([0-9a-fA-F]{40})\t(.+)$/s;
3266
3267                 $res{'mode'} = $1;
3268                 $res{'type'} = $2;
3269                 $res{'hash'} = $3;
3270                 if ($opts{'-z'}) {
3271                         $res{'name'} = $4;
3272                 } else {
3273                         $res{'name'} = unquote($4);
3274                 }
3275         }
3276
3277         return wantarray ? %res : \%res;
3278 }
3279
3280 # generates _two_ hashes, references to which are passed as 2 and 3 argument
3281 sub parse_from_to_diffinfo {
3282         my ($diffinfo, $from, $to, @parents) = @_;
3283
3284         if ($diffinfo->{'nparents'}) {
3285                 # combined diff
3286                 $from->{'file'} = [];
3287                 $from->{'href'} = [];
3288                 fill_from_file_info($diffinfo, @parents)
3289                         unless exists $diffinfo->{'from_file'};
3290                 for (my $i = 0; $i < $diffinfo->{'nparents'}; $i++) {
3291                         $from->{'file'}[$i] =
3292                                 defined $diffinfo->{'from_file'}[$i] ?
3293                                         $diffinfo->{'from_file'}[$i] :
3294                                         $diffinfo->{'to_file'};
3295                         if ($diffinfo->{'status'}[$i] ne "A") { # not new (added) file
3296                                 $from->{'href'}[$i] = href(action=>"blob",
3297                                                            hash_base=>$parents[$i],
3298                                                            hash=>$diffinfo->{'from_id'}[$i],
3299                                                            file_name=>$from->{'file'}[$i]);
3300                         } else {
3301                                 $from->{'href'}[$i] = undef;
3302                         }
3303                 }
3304         } else {
3305                 # ordinary (not combined) diff
3306                 $from->{'file'} = $diffinfo->{'from_file'};
3307                 if ($diffinfo->{'status'} ne "A") { # not new (added) file
3308                         $from->{'href'} = href(action=>"blob", hash_base=>$hash_parent,
3309                                                hash=>$diffinfo->{'from_id'},
3310                                                file_name=>$from->{'file'});
3311                 } else {
3312                         delete $from->{'href'};
3313                 }
3314         }
3315
3316         $to->{'file'} = $diffinfo->{'to_file'};
3317         if (!is_deleted($diffinfo)) { # file exists in result
3318                 $to->{'href'} = href(action=>"blob", hash_base=>$hash,
3319                                      hash=>$diffinfo->{'to_id'},
3320                                      file_name=>$to->{'file'});
3321         } else {
3322                 delete $to->{'href'};
3323         }
3324 }
3325
3326 ## ......................................................................
3327 ## parse to array of hashes functions
3328
3329 sub git_get_heads_list {
3330         my ($limit, @classes) = @_;
3331         @classes = ('heads') unless @classes;
3332         my @patterns = map { "refs/$_" } @classes;
3333         my @headslist;
3334
3335         open my $fd, '-|', git_cmd(), 'for-each-ref',
3336                 ($limit ? '--count='.($limit+1) : ()), '--sort=-committerdate',
3337                 '--format=%(objectname) %(refname) %(subject)%00%(committer)',
3338                 @patterns
3339                 or return;
3340         while (my $line = <$fd>) {
3341                 my %ref_item;
3342
3343                 chomp $line;
3344                 my ($refinfo, $committerinfo) = split(/\0/, $line);
3345                 my ($hash, $name, $title) = split(' ', $refinfo, 3);
3346                 my ($committer, $epoch, $tz) =
3347                         ($committerinfo =~ /^(.*) ([0-9]+) (.*)$/);
3348                 $ref_item{'fullname'}  = $name;
3349                 $name =~ s!^refs/(?:head|remote)s/!!;
3350
3351                 $ref_item{'name'}  = $name;
3352                 $ref_item{'id'}    = $hash;
3353                 $ref_item{'title'} = $title || '(no commit message)';
3354                 $ref_item{'epoch'} = $epoch;
3355                 if ($epoch) {
3356                         $ref_item{'age'} = age_string(time - $ref_item{'epoch'});
3357                 } else {
3358                         $ref_item{'age'} = "unknown";
3359                 }
3360
3361                 push @headslist, \%ref_item;
3362         }
3363         close $fd;
3364
3365         return wantarray ? @headslist : \@headslist;
3366 }
3367
3368 sub git_get_tags_list {
3369         my $limit = shift;
3370         my @tagslist;
3371
3372         open my $fd, '-|', git_cmd(), 'for-each-ref',
3373                 ($limit ? '--count='.($limit+1) : ()), '--sort=-creatordate',
3374                 '--format=%(objectname) %(objecttype) %(refname) '.
3375                 '%(*objectname) %(*objecttype) %(subject)%00%(creator)',
3376                 'refs/tags'
3377                 or return;
3378         while (my $line = <$fd>) {
3379                 my %ref_item;
3380
3381                 chomp $line;
3382                 my ($refinfo, $creatorinfo) = split(/\0/, $line);
3383                 my ($id, $type, $name, $refid, $reftype, $title) = split(' ', $refinfo, 6);
3384                 my ($creator, $epoch, $tz) =
3385                         ($creatorinfo =~ /^(.*) ([0-9]+) (.*)$/);
3386                 $ref_item{'fullname'} = $name;
3387                 $name =~ s!^refs/tags/!!;
3388
3389                 $ref_item{'type'} = $type;
3390                 $ref_item{'id'} = $id;
3391                 $ref_item{'name'} = $name;
3392                 if ($type eq "tag") {
3393                         $ref_item{'subject'} = $title;
3394                         $ref_item{'reftype'} = $reftype;
3395                         $ref_item{'refid'}   = $refid;
3396                 } else {
3397                         $ref_item{'reftype'} = $type;
3398                         $ref_item{'refid'}   = $id;
3399                 }
3400
3401                 if ($type eq "tag" || $type eq "commit") {
3402                         $ref_item{'epoch'} = $epoch;
3403                         if ($epoch) {
3404                                 $ref_item{'age'} = age_string(time - $ref_item{'epoch'});
3405                         } else {
3406                                 $ref_item{'age'} = "unknown";
3407                         }
3408                 }
3409
3410                 push @tagslist, \%ref_item;
3411         }
3412         close $fd;
3413
3414         return wantarray ? @tagslist : \@tagslist;
3415 }
3416
3417 ## ----------------------------------------------------------------------
3418 ## filesystem-related functions
3419
3420 sub get_file_owner {
3421         my $path = shift;
3422
3423         my ($dev, $ino, $mode, $nlink, $st_uid, $st_gid, $rdev, $size) = stat($path);
3424         my ($name, $passwd, $uid, $gid, $quota, $comment, $gcos, $dir, $shell) = getpwuid($st_uid);
3425         if (!defined $gcos) {
3426                 return undef;
3427         }
3428         my $owner = $gcos;
3429         $owner =~ s/[,;].*$//;
3430         return to_utf8($owner);
3431 }
3432
3433 # assume that file exists
3434 sub insert_file {
3435         my $filename = shift;
3436
3437         open my $fd, '<', $filename;
3438         print map { to_utf8($_) } <$fd>;
3439         close $fd;
3440 }
3441
3442 ## ......................................................................
3443 ## mimetype related functions
3444
3445 sub mimetype_guess_file {
3446         my $filename = shift;
3447         my $mimemap = shift;
3448         -r $mimemap or return undef;
3449
3450         my %mimemap;
3451         open(my $mh, '<', $mimemap) or return undef;
3452         while (<$mh>) {
3453                 next if m/^#/; # skip comments
3454                 my ($mimetype, $exts) = split(/\t+/);
3455                 if (defined $exts) {
3456                         my @exts = split(/\s+/, $exts);
3457                         foreach my $ext (@exts) {
3458                                 $mimemap{$ext} = $mimetype;
3459                         }
3460                 }
3461         }
3462         close($mh);
3463
3464         $filename =~ /\.([^.]*)$/;
3465         return $mimemap{$1};
3466 }
3467
3468 sub mimetype_guess {
3469         my $filename = shift;
3470         my $mime;
3471         $filename =~ /\./ or return undef;
3472
3473         if ($mimetypes_file) {
3474                 my $file = $mimetypes_file;
3475                 if ($file !~ m!^/!) { # if it is relative path
3476                         # it is relative to project
3477                         $file = "$projectroot/$project/$file";
3478                 }
3479                 $mime = mimetype_guess_file($filename, $file);
3480         }
3481         $mime ||= mimetype_guess_file($filename, '/etc/mime.types');
3482         return $mime;
3483 }
3484
3485 sub blob_mimetype {
3486         my $fd = shift;
3487         my $filename = shift;
3488
3489         if ($filename) {
3490                 my $mime = mimetype_guess($filename);
3491                 $mime and return $mime;
3492         }
3493
3494         # just in case
3495         return $default_blob_plain_mimetype unless $fd;
3496
3497         if (-T $fd) {
3498                 return 'text/plain';
3499         } elsif (! $filename) {
3500                 return 'application/octet-stream';
3501         } elsif ($filename =~ m/\.png$/i) {
3502                 return 'image/png';
3503         } elsif ($filename =~ m/\.gif$/i) {
3504                 return 'image/gif';
3505         } elsif ($filename =~ m/\.jpe?g$/i) {
3506                 return 'image/jpeg';
3507         } else {
3508                 return 'application/octet-stream';
3509         }
3510 }
3511
3512 sub blob_contenttype {
3513         my ($fd, $file_name, $type) = @_;
3514
3515         $type ||= blob_mimetype($fd, $file_name);
3516         if ($type eq 'text/plain' && defined $default_text_plain_charset) {
3517                 $type .= "; charset=$default_text_plain_charset";
3518         }
3519
3520         return $type;
3521 }
3522
3523 # guess file syntax for syntax highlighting; return undef if no highlighting
3524 # the name of syntax can (in the future) depend on syntax highlighter used
3525 sub guess_file_syntax {
3526         my ($highlight, $mimetype, $file_name) = @_;
3527         return undef unless ($highlight && defined $file_name);
3528         my $basename = basename($file_name, '.in');
3529         return $highlight_basename{$basename}
3530                 if exists $highlight_basename{$basename};
3531
3532         $basename =~ /\.([^.]*)$/;
3533         my $ext = $1 or return undef;
3534         return $highlight_ext{$ext}
3535                 if exists $highlight_ext{$ext};
3536
3537         return undef;
3538 }
3539
3540 # run highlighter and return FD of its output,
3541 # or return original FD if no highlighting
3542 sub run_highlighter {
3543         my ($fd, $highlight, $syntax) = @_;
3544         return $fd unless ($highlight && defined $syntax);
3545
3546         close $fd;
3547         open $fd, quote_command(git_cmd(), "cat-file", "blob", $hash)." | ".
3548                   quote_command($highlight_bin).
3549                   " --replace-tabs=8 --fragment --syntax $syntax |"
3550                 or die_error(500, "Couldn't open file or run syntax highlighter");
3551         return $fd;
3552 }
3553
3554 ## ======================================================================
3555 ## functions printing HTML: header, footer, error page
3556
3557 sub get_page_title {
3558         my $title = to_utf8($site_name);
3559
3560         return $title unless (defined $project);
3561         $title .= " - " . to_utf8($project);
3562
3563         return $title unless (defined $action);
3564         $title .= "/$action"; # $action is US-ASCII (7bit ASCII)
3565
3566         return $title unless (defined $file_name);
3567         $title .= " - " . esc_path($file_name);
3568         if ($action eq "tree" && $file_name !~ m|/$|) {
3569                 $title .= "/";
3570         }
3571
3572         return $title;
3573 }
3574
3575 sub print_feed_meta {
3576         if (defined $project) {
3577                 my %href_params = get_feed_info();
3578                 if (!exists $href_params{'-title'}) {
3579                         $href_params{'-title'} = 'log';
3580                 }
3581
3582                 foreach my $format (qw(RSS Atom)) {
3583                         my $type = lc($format);
3584                         my %link_attr = (
3585                                 '-rel' => 'alternate',
3586                                 '-title' => esc_attr("$project - $href_params{'-title'} - $format feed"),
3587                                 '-type' => "application/$type+xml"
3588                         );
3589
3590                         $href_params{'action'} = $type;
3591                         $link_attr{'-href'} = href(%href_params);
3592                         print "<link ".
3593                               "rel=\"$link_attr{'-rel'}\" ".
3594                               "title=\"$link_attr{'-title'}\" ".
3595                               "href=\"$link_attr{'-href'}\" ".
3596                               "type=\"$link_attr{'-type'}\" ".
3597                               "/>\n";
3598
3599                         $href_params{'extra_options'} = '--no-merges';
3600                         $link_attr{'-href'} = href(%href_params);
3601                         $link_attr{'-title'} .= ' (no merges)';
3602                         print "<link ".
3603                               "rel=\"$link_attr{'-rel'}\" ".
3604                               "title=\"$link_attr{'-title'}\" ".
3605                               "href=\"$link_attr{'-href'}\" ".
3606                               "type=\"$link_attr{'-type'}\" ".
3607                               "/>\n";
3608                 }
3609
3610         } else {
3611                 printf('<link rel="alternate" title="%s projects list" '.
3612                        'href="%s" type="text/plain; charset=utf-8" />'."\n",
3613                        esc_attr($site_name), href(project=>undef, action=>"project_index"));
3614                 printf('<link rel="alternate" title="%s projects feeds" '.
3615                        'href="%s" type="text/x-opml" />'."\n",
3616                        esc_attr($site_name), href(project=>undef, action=>"opml"));
3617         }
3618 }
3619
3620 sub git_header_html {
3621         my $status = shift || "200 OK";
3622         my $expires = shift;
3623         my %opts = @_;
3624
3625         my $title = get_page_title();
3626         my $content_type;
3627         # require explicit support from the UA if we are to send the page as
3628         # 'application/xhtml+xml', otherwise send it as plain old 'text/html'.
3629         # we have to do this because MSIE sometimes globs '*/*', pretending to
3630         # support xhtml+xml but choking when it gets what it asked for.
3631         if (defined $cgi->http('HTTP_ACCEPT') &&
3632             $cgi->http('HTTP_ACCEPT') =~ m/(,|;|\s|^)application\/xhtml\+xml(,|;|\s|$)/ &&
3633             $cgi->Accept('application/xhtml+xml') != 0) {
3634                 $content_type = 'application/xhtml+xml';
3635         } else {
3636                 $content_type = 'text/html';
3637         }
3638         print $cgi->header(-type=>$content_type, -charset => 'utf-8',
3639                            -status=> $status, -expires => $expires)
3640                 unless ($opts{'-no_http_header'});
3641         my $mod_perl_version = $ENV{'MOD_PERL'} ? " $ENV{'MOD_PERL'}" : '';
3642         print <<EOF;
3643 <?xml version="1.0" encoding="utf-8"?>
3644 <!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Strict//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-strict.dtd">
3645 <html xmlns="http://www.w3.org/1999/xhtml" xml:lang="en-US" lang="en-US">
3646 <!-- git web interface version $version, (C) 2005-2006, Kay Sievers <kay.sievers\@vrfy.org>, Christian Gierke -->
3647 <!-- git core binaries version $git_version -->
3648 <head>
3649 <meta http-equiv="content-type" content="$content_type; charset=utf-8"/>
3650 <meta name="generator" content="gitweb/$version git/$git_version$mod_perl_version"/>
3651 <meta name="robots" content="index, nofollow"/>
3652 <title>$title</title>
3653 EOF
3654         # the stylesheet, favicon etc urls won't work correctly with path_info
3655         # unless we set the appropriate base URL
3656         if ($ENV{'PATH_INFO'}) {
3657                 print "<base href=\"".esc_url($base_url)."\" />\n";
3658         }
3659         # print out each stylesheet that exist, providing backwards capability
3660         # for those people who defined $stylesheet in a config file
3661         if (defined $stylesheet) {
3662                 print '<link rel="stylesheet" type="text/css" href="'.esc_url($stylesheet).'"/>'."\n";
3663         } else {
3664                 foreach my $stylesheet (@stylesheets) {
3665                         next unless $stylesheet;
3666                         print '<link rel="stylesheet" type="text/css" href="'.esc_url($stylesheet).'"/>'."\n";
3667                 }
3668         }
3669         print_feed_meta()
3670                 if ($status eq '200 OK');
3671         if (defined $favicon) {
3672                 print qq(<link rel="shortcut icon" href=").esc_url($favicon).qq(" type="image/png" />\n);
3673         }
3674
3675         print "</head>\n" .
3676               "<body>\n";
3677
3678         if (defined $site_header && -f $site_header) {
3679                 insert_file($site_header);
3680         }
3681
3682         print "<div class=\"page_header\">\n";
3683         if (defined $logo) {
3684                 print $cgi->a({-href => esc_url($logo_url),
3685                                -title => $logo_label},
3686                               $cgi->img({-src => esc_url($logo),
3687                                          -width => 72, -height => 27,
3688                                          -alt => "git",
3689                                          -class => "logo"}));
3690         }
3691         print $cgi->a({-href => esc_url($home_link)}, $home_link_str) . " / ";
3692         if (defined $project) {
3693                 print $cgi->a({-href => href(action=>"summary")}, esc_html($project));
3694                 if (defined $action) {
3695                         my $action_print = $action ;
3696                         if (defined $opts{-action_extra}) {
3697                                 $action_print = $cgi->a({-href => href(action=>$action)},
3698                                         $action);
3699                         }
3700                         print " / $action_print";
3701                 }
3702                 if (defined $opts{-action_extra}) {
3703                         print " / $opts{-action_extra}";
3704                 }
3705                 print "\n";
3706         }
3707         print "</div>\n";
3708
3709         my $have_search = gitweb_check_feature('search');
3710         if (defined $project && $have_search) {
3711                 if (!defined $searchtext) {
3712                         $searchtext = "";
3713                 }
3714                 my $search_hash;
3715                 if (defined $hash_base) {
3716                         $search_hash = $hash_base;
3717                 } elsif (defined $hash) {
3718                         $search_hash = $hash;
3719                 } else {
3720                         $search_hash = "HEAD";
3721                 }
3722                 my $action = $my_uri;
3723                 my $use_pathinfo = gitweb_check_feature('pathinfo');
3724                 if ($use_pathinfo) {
3725                         $action .= "/".esc_url($project);
3726                 }
3727                 print $cgi->startform(-method => "get", -action => $action) .
3728                       "<div class=\"search\">\n" .
3729                       (!$use_pathinfo &&
3730                       $cgi->input({-name=>"p", -value=>$project, -type=>"hidden"}) . "\n") .
3731                       $cgi->input({-name=>"a", -value=>"search", -type=>"hidden"}) . "\n" .
3732                       $cgi->input({-name=>"h", -value=>$search_hash, -type=>"hidden"}) . "\n" .
3733                       $cgi->popup_menu(-name => 'st', -default => 'commit',
3734                                        -values => ['commit', 'grep', 'author', 'committer', 'pickaxe']) .
3735                       $cgi->sup($cgi->a({-href => href(action=>"search_help")}, "?")) .
3736                       " search:\n",
3737                       $cgi->textfield(-name => "s", -value => $searchtext) . "\n" .
3738                       "<span title=\"Extended regular expression\">" .
3739                       $cgi->checkbox(-name => 'sr', -value => 1, -label => 're',
3740                                      -checked => $search_use_regexp) .
3741                       "</span>" .
3742                       "</div>" .
3743                       $cgi->end_form() . "\n";
3744         }
3745 }
3746
3747 sub git_footer_html {
3748         my $feed_class = 'rss_logo';
3749
3750         print "<div class=\"page_footer\">\n";
3751         if (defined $project) {
3752                 my $descr = git_get_project_description($project);
3753                 if (defined $descr) {
3754                         print "<div class=\"page_footer_text\">" . esc_html($descr) . "</div>\n";
3755                 }
3756
3757                 my %href_params = get_feed_info();
3758                 if (!%href_params) {
3759                         $feed_class .= ' generic';
3760                 }
3761                 $href_params{'-title'} ||= 'log';
3762
3763                 foreach my $format (qw(RSS Atom)) {
3764                         $href_params{'action'} = lc($format);
3765                         print $cgi->a({-href => href(%href_params),
3766                                       -title => "$href_params{'-title'} $format feed",
3767                                       -class => $feed_class}, $format)."\n";
3768                 }
3769
3770         } else {
3771                 print $cgi->a({-href => href(project=>undef, action=>"opml"),
3772                               -class => $feed_class}, "OPML") . " ";
3773                 print $cgi->a({-href => href(project=>undef, action=>"project_index"),
3774                               -class => $feed_class}, "TXT") . "\n";
3775         }
3776         print "</div>\n"; # class="page_footer"
3777
3778         if (defined $t0 && gitweb_check_feature('timed')) {
3779                 print "<div id=\"generating_info\">\n";
3780                 print 'This page took '.
3781                       '<span id="generating_time" class="time_span">'.
3782                       tv_interval($t0, [ gettimeofday() ]).
3783                       ' seconds </span>'.
3784                       ' and '.
3785                       '<span id="generating_cmd">'.
3786                       $number_of_git_cmds.
3787                       '</span> git commands '.
3788                       " to generate.\n";
3789                 print "</div>\n"; # class="page_footer"
3790         }
3791
3792         if (defined $site_footer && -f $site_footer) {
3793                 insert_file($site_footer);
3794         }
3795
3796         print qq!<script type="text/javascript" src="!.esc_url($javascript).qq!"></script>\n!;
3797         if (defined $action &&
3798             $action eq 'blame_incremental') {
3799                 print qq!<script type="text/javascript">\n!.
3800                       qq!startBlame("!. href(action=>"blame_data", -replay=>1) .qq!",\n!.
3801                       qq!           "!. href() .qq!");\n!.
3802                       qq!</script>\n!;
3803         } elsif (gitweb_check_feature('javascript-actions')) {
3804                 print qq!<script type="text/javascript">\n!.
3805                       qq!window.onload = fixLinks;\n!.
3806                       qq!</script>\n!;
3807         }
3808
3809         print "</body>\n" .
3810               "</html>";
3811 }
3812
3813 # die_error(<http_status_code>, <error_message>[, <detailed_html_description>])
3814 # Example: die_error(404, 'Hash not found')
3815 # By convention, use the following status codes (as defined in RFC 2616):
3816 # 400: Invalid or missing CGI parameters, or
3817 #      requested object exists but has wrong type.
3818 # 403: Requested feature (like "pickaxe" or "snapshot") not enabled on
3819 #      this server or project.
3820 # 404: Requested object/revision/project doesn't exist.
3821 # 500: The server isn't configured properly, or
3822 #      an internal error occurred (e.g. failed assertions caused by bugs), or
3823 #      an unknown error occurred (e.g. the git binary died unexpectedly).
3824 # 503: The server is currently unavailable (because it is overloaded,
3825 #      or down for maintenance).  Generally, this is a temporary state.
3826 sub die_error {
3827         my $status = shift || 500;
3828         my $error = esc_html(shift) || "Internal Server Error";
3829         my $extra = shift;
3830         my %opts = @_;
3831
3832         my %http_responses = (
3833                 400 => '400 Bad Request',
3834                 403 => '403 Forbidden',
3835                 404 => '404 Not Found',
3836                 500 => '500 Internal Server Error',
3837                 503 => '503 Service Unavailable',
3838         );
3839         git_header_html($http_responses{$status}, undef, %opts);
3840         print <<EOF;
3841 <div class="page_body">
3842 <br /><br />
3843 $status - $error
3844 <br />
3845 EOF
3846         if (defined $extra) {
3847                 print "<hr />\n" .
3848                       "$extra\n";
3849         }
3850         print "</div>\n";
3851
3852         git_footer_html();
3853         goto DONE_GITWEB
3854                 unless ($opts{'-error_handler'});
3855 }
3856
3857 ## ----------------------------------------------------------------------
3858 ## functions printing or outputting HTML: navigation
3859
3860 sub git_print_page_nav {
3861         my ($current, $suppress, $head, $treehead, $treebase, $extra) = @_;
3862         $extra = '' if !defined $extra; # pager or formats
3863
3864         my @navs = qw(summary shortlog log commit commitdiff tree);
3865         if ($suppress) {
3866                 @navs = grep { $_ ne $suppress } @navs;
3867         }
3868
3869         my %arg = map { $_ => {action=>$_} } @navs;
3870         if (defined $head) {
3871                 for (qw(commit commitdiff)) {
3872                         $arg{$_}{'hash'} = $head;
3873                 }
3874                 if ($current =~ m/^(tree | log | shortlog | commit | commitdiff | search)$/x) {
3875                         for (qw(shortlog log)) {
3876                                 $arg{$_}{'hash'} = $head;
3877                         }
3878                 }
3879         }
3880
3881         $arg{'tree'}{'hash'} = $treehead if defined $treehead;
3882         $arg{'tree'}{'hash_base'} = $treebase if defined $treebase;
3883
3884         my @actions = gitweb_get_feature('actions');
3885         my %repl = (
3886                 '%' => '%',
3887                 'n' => $project,         # project name
3888                 'f' => $git_dir,         # project path within filesystem
3889                 'h' => $treehead || '',  # current hash ('h' parameter)
3890                 'b' => $treebase || '',  # hash base ('hb' parameter)
3891         );
3892         while (@actions) {
3893                 my ($label, $link, $pos) = splice(@actions,0,3);
3894                 # insert
3895                 @navs = map { $_ eq $pos ? ($_, $label) : $_ } @navs;
3896                 # munch munch
3897                 $link =~ s/%([%nfhb])/$repl{$1}/g;
3898                 $arg{$label}{'_href'} = $link;
3899         }
3900
3901         print "<div class=\"page_nav\">\n" .
3902                 (join " | ",
3903                  map { $_ eq $current ?
3904                        $_ : $cgi->a({-href => ($arg{$_}{_href} ? $arg{$_}{_href} : href(%{$arg{$_}}))}, "$_")
3905                  } @navs);
3906         print "<br/>\n$extra<br/>\n" .
3907               "</div>\n";
3908 }
3909
3910 # returns a submenu for the nagivation of the refs views (tags, heads,
3911 # remotes) with the current view disabled and the remotes view only
3912 # available if the feature is enabled
3913 sub format_ref_views {
3914         my ($current) = @_;
3915         my @ref_views = qw{tags heads};
3916         push @ref_views, 'remotes' if gitweb_check_feature('remote_heads');
3917         return join " | ", map {
3918                 $_ eq $current ? $_ :
3919                 $cgi->a({-href => href(action=>$_)}, $_)
3920         } @ref_views
3921 }
3922
3923 sub format_paging_nav {
3924         my ($action, $page, $has_next_link) = @_;
3925         my $paging_nav;
3926
3927
3928         if ($page > 0) {
3929                 $paging_nav .=
3930                         $cgi->a({-href => href(-replay=>1, page=>undef)}, "first") .
3931                         " &sdot; " .
3932                         $cgi->a({-href => href(-replay=>1, page=>$page-1),
3933                                  -accesskey => "p", -title => "Alt-p"}, "prev");
3934         } else {
3935                 $paging_nav .= "first &sdot; prev";
3936         }
3937
3938         if ($has_next_link) {
3939                 $paging_nav .= " &sdot; " .
3940                         $cgi->a({-href => href(-replay=>1, page=>$page+1),
3941                                  -accesskey => "n", -title => "Alt-n"}, "next");
3942         } else {
3943                 $paging_nav .= " &sdot; next";
3944         }
3945
3946         return $paging_nav;
3947 }
3948
3949 ## ......................................................................
3950 ## functions printing or outputting HTML: div
3951
3952 sub git_print_header_div {
3953         my ($action, $title, $hash, $hash_base) = @_;
3954         my %args = ();
3955
3956         $args{'action'} = $action;
3957         $args{'hash'} = $hash if $hash;
3958         $args{'hash_base'} = $hash_base if $hash_base;
3959
3960         print "<div class=\"header\">\n" .
3961               $cgi->a({-href => href(%args), -class => "title"},
3962               $title ? $title : $action) .
3963               "\n</div>\n";
3964 }
3965
3966 sub format_repo_url {
3967         my ($name, $url) = @_;
3968         return "<tr class=\"metadata_url\"><td>$name</td><td>$url</td></tr>\n";
3969 }
3970
3971 # Group output by placing it in a DIV element and adding a header.
3972 # Options for start_div() can be provided by passing a hash reference as the
3973 # first parameter to the function.
3974 # Options to git_print_header_div() can be provided by passing an array
3975 # reference. This must follow the options to start_div if they are present.
3976 # The content can be a scalar, which is output as-is, a scalar reference, which
3977 # is output after html escaping, an IO handle passed either as *handle or
3978 # *handle{IO}, or a function reference. In the latter case all following
3979 # parameters will be taken as argument to the content function call.
3980 sub git_print_section {
3981         my ($div_args, $header_args, $content);
3982         my $arg = shift;
3983         if (ref($arg) eq 'HASH') {
3984                 $div_args = $arg;
3985                 $arg = shift;
3986         }
3987         if (ref($arg) eq 'ARRAY') {
3988                 $header_args = $arg;
3989                 $arg = shift;
3990         }
3991         $content = $arg;
3992
3993         print $cgi->start_div($div_args);
3994         git_print_header_div(@$header_args);
3995
3996         if (ref($content) eq 'CODE') {
3997                 $content->(@_);
3998         } elsif (ref($content) eq 'SCALAR') {
3999                 print esc_html($$content);
4000         } elsif (ref($content) eq 'GLOB' or ref($content) eq 'IO::Handle') {
4001                 print <$content>;
4002         } elsif (!ref($content) && defined($content)) {
4003                 print $content;
4004         }
4005
4006         print $cgi->end_div;
4007 }
4008
4009 sub print_local_time {
4010         print format_local_time(@_);
4011 }
4012
4013 sub format_local_time {
4014         my $localtime = '';
4015         my %date = @_;
4016         if ($date{'hour_local'} < 6) {
4017                 $localtime .= sprintf(" (<span class=\"atnight\">%02d:%02d</span> %s)",
4018                         $date{'hour_local'}, $date{'minute_local'}, $date{'tz_local'});
4019         } else {
4020                 $localtime .= sprintf(" (%02d:%02d %s)",
4021                         $date{'hour_local'}, $date{'minute_local'}, $date{'tz_local'});
4022         }
4023
4024         return $localtime;
4025 }
4026
4027 # Outputs the author name and date in long form
4028 sub git_print_authorship {
4029         my $co = shift;
4030         my %opts = @_;
4031         my $tag = $opts{-tag} || 'div';
4032         my $author = $co->{'author_name'};
4033
4034         my %ad = parse_date($co->{'author_epoch'}, $co->{'author_tz'});
4035         print "<$tag class=\"author_date\">" .
4036               format_search_author($author, "author", esc_html($author)) .
4037               " [$ad{'rfc2822'}";
4038         print_local_time(%ad) if ($opts{-localtime});
4039         print "]" . git_get_avatar($co->{'author_email'}, -pad_before => 1)
4040                   . "</$tag>\n";
4041 }
4042
4043 # Outputs table rows containing the full author or committer information,
4044 # in the format expected for 'commit' view (& similar).
4045 # Parameters are a commit hash reference, followed by the list of people
4046 # to output information for. If the list is empty it defaults to both
4047 # author and committer.
4048 sub git_print_authorship_rows {
4049         my $co = shift;
4050         # too bad we can't use @people = @_ || ('author', 'committer')
4051         my @people = @_;
4052         @people = ('author', 'committer') unless @people;
4053         foreach my $who (@people) {
4054                 my %wd = parse_date($co->{"${who}_epoch"}, $co->{"${who}_tz"});
4055                 print "<tr><td>$who</td><td>" .
4056                       format_search_author($co->{"${who}_name"}, $who,
4057                                esc_html($co->{"${who}_name"})) . " " .
4058                       format_search_author($co->{"${who}_email"}, $who,
4059                                esc_html("<" . $co->{"${who}_email"} . ">")) .
4060                       "</td><td rowspan=\"2\">" .
4061                       git_get_avatar($co->{"${who}_email"}, -size => 'double') .
4062                       "</td></tr>\n" .
4063                       "<tr>" .
4064                       "<td></td><td> $wd{'rfc2822'}";
4065                 print_local_time(%wd);
4066                 print "</td>" .
4067                       "</tr>\n";
4068         }
4069 }
4070
4071 sub git_print_page_path {
4072         my $name = shift;
4073         my $type = shift;
4074         my $hb = shift;
4075
4076
4077         print "<div class=\"page_path\">";
4078         print $cgi->a({-href => href(action=>"tree", hash_base=>$hb),
4079                       -title => 'tree root'}, to_utf8("[$project]"));
4080         print " / ";
4081         if (defined $name) {
4082                 my @dirname = split '/', $name;
4083                 my $basename = pop @dirname;
4084                 my $fullname = '';
4085
4086                 foreach my $dir (@dirname) {
4087                         $fullname .= ($fullname ? '/' : '') . $dir;
4088                         print $cgi->a({-href => href(action=>"tree", file_name=>$fullname,
4089                                                      hash_base=>$hb),
4090                                       -title => $fullname}, esc_path($dir));
4091                         print " / ";
4092                 }
4093                 if (defined $type && $type eq 'blob') {
4094                         print $cgi->a({-href => href(action=>"blob_plain", file_name=>$file_name,
4095                                                      hash_base=>$hb),
4096                                       -title => $name}, esc_path($basename));
4097                 } elsif (defined $type && $type eq 'tree') {
4098                         print $cgi->a({-href => href(action=>"tree", file_name=>$file_name,
4099                                                      hash_base=>$hb),
4100                                       -title => $name}, esc_path($basename));
4101                         print " / ";
4102                 } else {
4103                         print esc_path($basename);
4104                 }
4105         }
4106         print "<br/></div>\n";
4107 }
4108
4109 sub git_print_log {
4110         my $log = shift;
4111         my %opts = @_;
4112
4113         if ($opts{'-remove_title'}) {
4114                 # remove title, i.e. first line of log
4115                 shift @$log;
4116         }
4117         # remove leading empty lines
4118         while (defined $log->[0] && $log->[0] eq "") {
4119                 shift @$log;
4120         }
4121
4122         # print log
4123         my $signoff = 0;
4124         my $empty = 0;
4125         foreach my $line (@$log) {
4126                 if ($line =~ m/^ *(signed[ \-]off[ \-]by[ :]|acked[ \-]by[ :]|cc[ :])/i) {
4127                         $signoff = 1;
4128                         $empty = 0;
4129                         if (! $opts{'-remove_signoff'}) {
4130                                 print "<span class=\"signoff\">" . esc_html($line) . "</span><br/>\n";
4131                                 next;
4132                         } else {
4133                                 # remove signoff lines
4134                                 next;
4135                         }
4136                 } else {
4137                         $signoff = 0;
4138                 }
4139
4140                 # print only one empty line
4141                 # do not print empty line after signoff
4142                 if ($line eq "") {
4143                         next if ($empty || $signoff);
4144                         $empty = 1;
4145                 } else {
4146                         $empty = 0;
4147                 }
4148
4149                 print format_log_line_html($line) . "<br/>\n";
4150         }
4151
4152         if ($opts{'-final_empty_line'}) {
4153                 # end with single empty line
4154                 print "<br/>\n" unless $empty;
4155         }
4156 }
4157
4158 # return link target (what link points to)
4159 sub git_get_link_target {
4160         my $hash = shift;
4161         my $link_target;
4162
4163         # read link
4164         open my $fd, "-|", git_cmd(), "cat-file", "blob", $hash
4165                 or return;
4166         {
4167                 local $/ = undef;
4168                 $link_target = <$fd>;
4169         }
4170         close $fd
4171                 or return;
4172
4173         return $link_target;
4174 }
4175
4176 # given link target, and the directory (basedir) the link is in,
4177 # return target of link relative to top directory (top tree);
4178 # return undef if it is not possible (including absolute links).
4179 sub normalize_link_target {
4180         my ($link_target, $basedir) = @_;
4181
4182         # absolute symlinks (beginning with '/') cannot be normalized
4183         return if (substr($link_target, 0, 1) eq '/');
4184
4185         # normalize link target to path from top (root) tree (dir)
4186         my $path;
4187         if ($basedir) {
4188                 $path = $basedir . '/' . $link_target;
4189         } else {
4190                 # we are in top (root) tree (dir)
4191                 $path = $link_target;
4192         }
4193
4194         # remove //, /./, and /../
4195         my @path_parts;
4196         foreach my $part (split('/', $path)) {
4197                 # discard '.' and ''
4198                 next if (!$part || $part eq '.');
4199                 # handle '..'
4200                 if ($part eq '..') {
4201                         if (@path_parts) {
4202                                 pop @path_parts;
4203                         } else {
4204                                 # link leads outside repository (outside top dir)
4205                                 return;
4206                         }
4207                 } else {
4208                         push @path_parts, $part;
4209                 }
4210         }
4211         $path = join('/', @path_parts);
4212
4213         return $path;
4214 }
4215
4216 # print tree entry (row of git_tree), but without encompassing <tr> element
4217 sub git_print_tree_entry {
4218         my ($t, $basedir, $hash_base, $have_blame) = @_;
4219
4220         my %base_key = ();
4221         $base_key{'hash_base'} = $hash_base if defined $hash_base;
4222
4223         # The format of a table row is: mode list link.  Where mode is
4224         # the mode of the entry, list is the name of the entry, an href,
4225         # and link is the action links of the entry.
4226
4227         print "<td class=\"mode\">" . mode_str($t->{'mode'}) . "</td>\n";
4228         if (exists $t->{'size'}) {
4229                 print "<td class=\"size\">$t->{'size'}</td>\n";
4230         }
4231         if ($t->{'type'} eq "blob") {
4232                 print "<td class=\"list\">" .
4233                         $cgi->a({-href => href(action=>"blob", hash=>$t->{'hash'},
4234                                                file_name=>"$basedir$t->{'name'}", %base_key),
4235                                 -class => "list"}, esc_path($t->{'name'}));
4236                 if (S_ISLNK(oct $t->{'mode'})) {
4237                         my $link_target = git_get_link_target($t->{'hash'});
4238                         if ($link_target) {
4239                                 my $norm_target = normalize_link_target($link_target, $basedir);
4240                                 if (defined $norm_target) {
4241                                         print " -> " .
4242                                               $cgi->a({-href => href(action=>"object", hash_base=>$hash_base,
4243                                                                      file_name=>$norm_target),
4244                                                        -title => $norm_target}, esc_path($link_target));
4245                                 } else {
4246                                         print " -> " . esc_path($link_target);
4247                                 }
4248                         }
4249                 }
4250                 print "</td>\n";
4251                 print "<td class=\"link\">";
4252                 print $cgi->a({-href => href(action=>"blob", hash=>$t->{'hash'},
4253                                              file_name=>"$basedir$t->{'name'}", %base_key)},
4254                               "blob");
4255                 if ($have_blame) {
4256                         print " | " .
4257                               $cgi->a({-href => href(action=>"blame", hash=>$t->{'hash'},
4258                                                      file_name=>"$basedir$t->{'name'}", %base_key)},
4259                                       "blame");
4260                 }
4261                 if (defined $hash_base) {
4262                         print " | " .
4263                               $cgi->a({-href => href(action=>"history", hash_base=>$hash_base,
4264                                                      hash=>$t->{'hash'}, file_name=>"$basedir$t->{'name'}")},
4265                                       "history");
4266                 }
4267                 print " | " .
4268                         $cgi->a({-href => href(action=>"blob_plain", hash_base=>$hash_base,
4269                                                file_name=>"$basedir$t->{'name'}")},
4270                                 "raw");
4271                 print "</td>\n";
4272
4273         } elsif ($t->{'type'} eq "tree") {
4274                 print "<td class=\"list\">";
4275                 print $cgi->a({-href => href(action=>"tree", hash=>$t->{'hash'},
4276                                              file_name=>"$basedir$t->{'name'}",
4277                                              %base_key)},
4278                               esc_path($t->{'name'}));
4279                 print "</td>\n";
4280                 print "<td class=\"link\">";
4281                 print $cgi->a({-href => href(action=>"tree", hash=>$t->{'hash'},
4282                                              file_name=>"$basedir$t->{'name'}",
4283                                              %base_key)},
4284                               "tree");
4285                 if (defined $hash_base) {
4286                         print " | " .
4287                               $cgi->a({-href => href(action=>"history", hash_base=>$hash_base,
4288                                                      file_name=>"$basedir$t->{'name'}")},
4289                                       "history");
4290                 }
4291                 print "</td>\n";
4292         } else {
4293                 # unknown object: we can only present history for it
4294                 # (this includes 'commit' object, i.e. submodule support)
4295                 print "<td class=\"list\">" .
4296                       esc_path($t->{'name'}) .
4297                       "</td>\n";
4298                 print "<td class=\"link\">";
4299                 if (defined $hash_base) {
4300                         print $cgi->a({-href => href(action=>"history",
4301                                                      hash_base=>$hash_base,
4302                                                      file_name=>"$basedir$t->{'name'}")},
4303                                       "history");
4304                 }
4305                 print "</td>\n";
4306         }
4307 }
4308
4309 ## ......................................................................
4310 ## functions printing large fragments of HTML
4311
4312 # get pre-image filenames for merge (combined) diff
4313 sub fill_from_file_info {
4314         my ($diff, @parents) = @_;
4315
4316         $diff->{'from_file'} = [ ];
4317         $diff->{'from_file'}[$diff->{'nparents'} - 1] = undef;
4318         for (my $i = 0; $i < $diff->{'nparents'}; $i++) {
4319                 if ($diff->{'status'}[$i] eq 'R' ||
4320                     $diff->{'status'}[$i] eq 'C') {
4321                         $diff->{'from_file'}[$i] =
4322                                 git_get_path_by_hash($parents[$i], $diff->{'from_id'}[$i]);
4323                 }
4324         }
4325
4326         return $diff;
4327 }
4328
4329 # is current raw difftree line of file deletion
4330 sub is_deleted {
4331         my $diffinfo = shift;
4332
4333         return $diffinfo->{'to_id'} eq ('0' x 40);
4334 }
4335
4336 # does patch correspond to [previous] difftree raw line
4337 # $diffinfo  - hashref of parsed raw diff format
4338 # $patchinfo - hashref of parsed patch diff format
4339 #              (the same keys as in $diffinfo)
4340 sub is_patch_split {
4341         my ($diffinfo, $patchinfo) = @_;
4342
4343         return defined $diffinfo && defined $patchinfo
4344                 && $diffinfo->{'to_file'} eq $patchinfo->{'to_file'};
4345 }
4346
4347
4348 sub git_difftree_body {
4349         my ($difftree, $hash, @parents) = @_;
4350         my ($parent) = $parents[0];
4351         my $have_blame = gitweb_check_feature('blame');
4352         print "<div class=\"list_head\">\n";
4353         if ($#{$difftree} > 10) {
4354                 print(($#{$difftree} + 1) . " files changed:\n");
4355         }
4356         print "</div>\n";
4357
4358         print "<table class=\"" .
4359               (@parents > 1 ? "combined " : "") .
4360               "diff_tree\">\n";
4361
4362         # header only for combined diff in 'commitdiff' view
4363         my $has_header = @$difftree && @parents > 1 && $action eq 'commitdiff';
4364         if ($has_header) {
4365                 # table header
4366                 print "<thead><tr>\n" .
4367                        "<th></th><th></th>\n"; # filename, patchN link
4368                 for (my $i = 0; $i < @parents; $i++) {
4369                         my $par = $parents[$i];
4370                         print "<th>" .
4371                               $cgi->a({-href => href(action=>"commitdiff",
4372                                                      hash=>$hash, hash_parent=>$par),
4373                                        -title => 'commitdiff to parent number ' .
4374                                                   ($i+1) . ': ' . substr($par,0,7)},
4375                                       $i+1) .
4376                               "&nbsp;</th>\n";
4377                 }
4378                 print "</tr></thead>\n<tbody>\n";
4379         }
4380
4381         my $alternate = 1;
4382         my $patchno = 0;
4383         foreach my $line (@{$difftree}) {
4384                 my $diff = parsed_difftree_line($line);
4385
4386                 if ($alternate) {
4387                         print "<tr class=\"dark\">\n";
4388                 } else {
4389                         print "<tr class=\"light\">\n";
4390                 }
4391                 $alternate ^= 1;
4392
4393                 if (exists $diff->{'nparents'}) { # combined diff
4394
4395                         fill_from_file_info($diff, @parents)
4396                                 unless exists $diff->{'from_file'};
4397
4398                         if (!is_deleted($diff)) {
4399                                 # file exists in the result (child) commit
4400                                 print "<td>" .
4401                                       $cgi->a({-href => href(action=>"blob", hash=>$diff->{'to_id'},
4402                                                              file_name=>$diff->{'to_file'},
4403                                                              hash_base=>$hash),
4404                                               -class => "list"}, esc_path($diff->{'to_file'})) .
4405                                       "</td>\n";
4406                         } else {
4407                                 print "<td>" .
4408                                       esc_path($diff->{'to_file'}) .
4409                                       "</td>\n";
4410                         }
4411
4412                         if ($action eq 'commitdiff') {
4413                                 # link to patch
4414                                 $patchno++;
4415                                 print "<td class=\"link\">" .
4416                                       $cgi->a({-href => href(-anchor=>"patch$patchno")},
4417                                               "patch") .
4418                                       " | " .
4419                                       "</td>\n";
4420                         }
4421
4422                         my $has_history = 0;
4423                         my $not_deleted = 0;
4424                         for (my $i = 0; $i < $diff->{'nparents'}; $i++) {
4425                                 my $hash_parent = $parents[$i];
4426                                 my $from_hash = $diff->{'from_id'}[$i];
4427                                 my $from_path = $diff->{'from_file'}[$i];
4428                                 my $status = $diff->{'status'}[$i];
4429
4430                                 $has_history ||= ($status ne 'A');
4431                                 $not_deleted ||= ($status ne 'D');
4432
4433                                 if ($status eq 'A') {
4434                                         print "<td  class=\"link\" align=\"right\"> | </td>\n";
4435                                 } elsif ($status eq 'D') {
4436                                         print "<td class=\"link\">" .
4437                                               $cgi->a({-href => href(action=>"blob",
4438                                                                      hash_base=>$hash,
4439                                                                      hash=>$from_hash,
4440                                                                      file_name=>$from_path)},
4441                                                       "blob" . ($i+1)) .
4442                                               " | </td>\n";
4443                                 } else {
4444                                         if ($diff->{'to_id'} eq $from_hash) {
4445                                                 print "<td class=\"link nochange\">";
4446                                         } else {
4447                                                 print "<td class=\"link\">";
4448                                         }
4449                                         print $cgi->a({-href => href(action=>"blobdiff",
4450                                                                      hash=>$diff->{'to_id'},
4451                                                                      hash_parent=>$from_hash,
4452                                                                      hash_base=>$hash,
4453                                                                      hash_parent_base=>$hash_parent,
4454                                                                      file_name=>$diff->{'to_file'},
4455                                                                      file_parent=>$from_path)},
4456                                                       "diff" . ($i+1)) .
4457                                               " | </td>\n";
4458                                 }
4459                         }
4460
4461                         print "<td class=\"link\">";
4462                         if ($not_deleted) {
4463                                 print $cgi->a({-href => href(action=>"blob",
4464                                                              hash=>$diff->{'to_id'},
4465                                                              file_name=>$diff->{'to_file'},
4466                                                              hash_base=>$hash)},
4467                                               "blob");
4468                                 print " | " if ($has_history);
4469                         }
4470                         if ($has_history) {
4471                                 print $cgi->a({-href => href(action=>"history",
4472                                                              file_name=>$diff->{'to_file'},
4473                                                              hash_base=>$hash)},
4474                                               "history");
4475                         }
4476                         print "</td>\n";
4477
4478                         print "</tr>\n";
4479                         next; # instead of 'else' clause, to avoid extra indent
4480                 }
4481                 # else ordinary diff
4482
4483                 my ($to_mode_oct, $to_mode_str, $to_file_type);
4484                 my ($from_mode_oct, $from_mode_str, $from_file_type);
4485                 if ($diff->{'to_mode'} ne ('0' x 6)) {
4486                         $to_mode_oct = oct $diff->{'to_mode'};
4487                         if (S_ISREG($to_mode_oct)) { # only for regular file
4488                                 $to_mode_str = sprintf("%04o", $to_mode_oct & 0777); # permission bits
4489                         }
4490                         $to_file_type = file_type($diff->{'to_mode'});
4491                 }
4492                 if ($diff->{'from_mode'} ne ('0' x 6)) {
4493                         $from_mode_oct = oct $diff->{'from_mode'};
4494                         if (S_ISREG($from_mode_oct)) { # only for regular file
4495                                 $from_mode_str = sprintf("%04o", $from_mode_oct & 0777); # permission bits
4496                         }
4497                         $from_file_type = file_type($diff->{'from_mode'});
4498                 }
4499
4500                 if ($diff->{'status'} eq "A") { # created
4501                         my $mode_chng = "<span class=\"file_status new\">[new $to_file_type";
4502                         $mode_chng   .= " with mode: $to_mode_str" if $to_mode_str;
4503                         $mode_chng   .= "]</span>";
4504                         print "<td>";
4505                         print $cgi->a({-href => href(action=>"blob", hash=>$diff->{'to_id'},
4506                                                      hash_base=>$hash, file_name=>$diff->{'file'}),
4507                                       -class => "list"}, esc_path($diff->{'file'}));
4508                         print "</td>\n";
4509                         print "<td>$mode_chng</td>\n";
4510                         print "<td class=\"link\">";
4511                         if ($action eq 'commitdiff') {
4512                                 # link to patch
4513                                 $patchno++;
4514                                 print $cgi->a({-href => href(-anchor=>"patch$patchno")},
4515                                               "patch") .
4516                                       " | ";
4517                         }
4518                         print $cgi->a({-href => href(action=>"blob", hash=>$diff->{'to_id'},
4519                                                      hash_base=>$hash, file_name=>$diff->{'file'})},
4520                                       "blob");
4521                         print "</td>\n";
4522
4523                 } elsif ($diff->{'status'} eq "D") { # deleted
4524                         my $mode_chng = "<span class=\"file_status deleted\">[deleted $from_file_type]</span>";
4525                         print "<td>";
4526                         print $cgi->a({-href => href(action=>"blob", hash=>$diff->{'from_id'},
4527                                                      hash_base=>$parent, file_name=>$diff->{'file'}),
4528                                        -class => "list"}, esc_path($diff->{'file'}));
4529                         print "</td>\n";
4530                         print "<td>$mode_chng</td>\n";
4531                         print "<td class=\"link\">";
4532                         if ($action eq 'commitdiff') {
4533                                 # link to patch
4534                                 $patchno++;
4535                                 print $cgi->a({-href => href(-anchor=>"patch$patchno")},
4536                                               "patch") .
4537                                       " | ";
4538                         }
4539                         print $cgi->a({-href => href(action=>"blob", hash=>$diff->{'from_id'},
4540                                                      hash_base=>$parent, file_name=>$diff->{'file'})},
4541                                       "blob") . " | ";
4542                         if ($have_blame) {
4543                                 print $cgi->a({-href => href(action=>"blame", hash_base=>$parent,
4544                                                              file_name=>$diff->{'file'})},
4545                                               "blame") . " | ";
4546                         }
4547                         print $cgi->a({-href => href(action=>"history", hash_base=>$parent,
4548                                                      file_name=>$diff->{'file'})},
4549                                       "history");
4550                         print "</td>\n";
4551
4552                 } elsif ($diff->{'status'} eq "M" || $diff->{'status'} eq "T") { # modified, or type changed
4553                         my $mode_chnge = "";
4554                         if ($diff->{'from_mode'} != $diff->{'to_mode'}) {
4555                                 $mode_chnge = "<span class=\"file_status mode_chnge\">[changed";
4556                                 if ($from_file_type ne $to_file_type) {
4557                                         $mode_chnge .= " from $from_file_type to $to_file_type";
4558                                 }
4559                                 if (($from_mode_oct & 0777) != ($to_mode_oct & 0777)) {
4560                                         if ($from_mode_str && $to_mode_str) {
4561                                                 $mode_chnge .= " mode: $from_mode_str->$to_mode_str";
4562                                         } elsif ($to_mode_str) {
4563                                                 $mode_chnge .= " mode: $to_mode_str";
4564                                         }
4565                                 }
4566                                 $mode_chnge .= "]</span>\n";
4567                         }
4568                         print "<td>";
4569                         print $cgi->a({-href => href(action=>"blob", hash=>$diff->{'to_id'},
4570                                                      hash_base=>$hash, file_name=>$diff->{'file'}),
4571                                       -class => "list"}, esc_path($diff->{'file'}));
4572                         print "</td>\n";
4573                         print "<td>$mode_chnge</td>\n";
4574                         print "<td class=\"link\">";
4575                         if ($action eq 'commitdiff') {
4576                                 # link to patch
4577                                 $patchno++;
4578                                 print $cgi->a({-href => href(-anchor=>"patch$patchno")},
4579                                               "patch") .
4580                                       " | ";
4581                         } elsif ($diff->{'to_id'} ne $diff->{'from_id'}) {
4582                                 # "commit" view and modified file (not onlu mode changed)
4583                                 print $cgi->a({-href => href(action=>"blobdiff",
4584                                                              hash=>$diff->{'to_id'}, hash_parent=>$diff->{'from_id'},
4585                                                              hash_base=>$hash, hash_parent_base=>$parent,
4586                                                              file_name=>$diff->{'file'})},
4587                                               "diff") .
4588                                       " | ";
4589                         }
4590                         print $cgi->a({-href => href(action=>"blob", hash=>$diff->{'to_id'},
4591                                                      hash_base=>$hash, file_name=>$diff->{'file'})},
4592                                        "blob") . " | ";
4593                         if ($have_blame) {
4594                                 print $cgi->a({-href => href(action=>"blame", hash_base=>$hash,
4595                                                              file_name=>$diff->{'file'})},
4596                                               "blame") . " | ";
4597                         }
4598                         print $cgi->a({-href => href(action=>"history", hash_base=>$hash,
4599                                                      file_name=>$diff->{'file'})},
4600                                       "history");
4601                         print "</td>\n";
4602
4603                 } elsif ($diff->{'status'} eq "R" || $diff->{'status'} eq "C") { # renamed or copied
4604                         my %status_name = ('R' => 'moved', 'C' => 'copied');
4605                         my $nstatus = $status_name{$diff->{'status'}};
4606                         my $mode_chng = "";
4607                         if ($diff->{'from_mode'} != $diff->{'to_mode'}) {
4608                                 # mode also for directories, so we cannot use $to_mode_str
4609                                 $mode_chng = sprintf(", mode: %04o", $to_mode_oct & 0777);
4610                         }
4611                         print "<td>" .
4612                               $cgi->a({-href => href(action=>"blob", hash_base=>$hash,
4613                                                      hash=>$diff->{'to_id'}, file_name=>$diff->{'to_file'}),
4614                                       -class => "list"}, esc_path($diff->{'to_file'})) . "</td>\n" .
4615                               "<td><span class=\"file_status $nstatus\">[$nstatus from " .
4616                               $cgi->a({-href => href(action=>"blob", hash_base=>$parent,
4617                                                      hash=>$diff->{'from_id'}, file_name=>$diff->{'from_file'}),
4618                                       -class => "list"}, esc_path($diff->{'from_file'})) .
4619                               " with " . (int $diff->{'similarity'}) . "% similarity$mode_chng]</span></td>\n" .
4620                               "<td class=\"link\">";
4621                         if ($action eq 'commitdiff') {
4622                                 # link to patch
4623                                 $patchno++;
4624                                 print $cgi->a({-href => href(-anchor=>"patch$patchno")},
4625                                               "patch") .
4626                                       " | ";
4627                         } elsif ($diff->{'to_id'} ne $diff->{'from_id'}) {
4628                                 # "commit" view and modified file (not only pure rename or copy)
4629                                 print $cgi->a({-href => href(action=>"blobdiff",
4630                                                              hash=>$diff->{'to_id'}, hash_parent=>$diff->{'from_id'},
4631                                                              hash_base=>$hash, hash_parent_base=>$parent,
4632                                                              file_name=>$diff->{'to_file'}, file_parent=>$diff->{'from_file'})},
4633                                               "diff") .
4634                                       " | ";
4635                         }
4636                         print $cgi->a({-href => href(action=>"blob", hash=>$diff->{'to_id'},
4637                                                      hash_base=>$parent, file_name=>$diff->{'to_file'})},
4638                                       "blob") . " | ";
4639                         if ($have_blame) {
4640                                 print $cgi->a({-href => href(action=>"blame", hash_base=>$hash,
4641                                                              file_name=>$diff->{'to_file'})},
4642                                               "blame") . " | ";
4643                         }
4644                         print $cgi->a({-href => href(action=>"history", hash_base=>$hash,
4645                                                     file_name=>$diff->{'to_file'})},
4646                                       "history");
4647                         print "</td>\n";
4648
4649                 } # we should not encounter Unmerged (U) or Unknown (X) status
4650                 print "</tr>\n";
4651         }
4652         print "</tbody>" if $has_header;
4653         print "</table>\n";
4654 }
4655
4656 sub git_patchset_body {
4657         my ($fd, $difftree, $hash, @hash_parents) = @_;
4658         my ($hash_parent) = $hash_parents[0];
4659
4660         my $is_combined = (@hash_parents > 1);
4661         my $patch_idx = 0;
4662         my $patch_number = 0;
4663         my $patch_line;
4664         my $diffinfo;
4665         my $to_name;
4666         my (%from, %to);
4667
4668         print "<div class=\"patchset\">\n";
4669
4670         # skip to first patch
4671         while ($patch_line = <$fd>) {
4672                 chomp $patch_line;
4673
4674                 last if ($patch_line =~ m/^diff /);
4675         }
4676
4677  PATCH:
4678         while ($patch_line) {
4679
4680                 # parse "git diff" header line
4681                 if ($patch_line =~ m/^diff --git (\"(?:[^\\\"]*(?:\\.[^\\\"]*)*)\"|[^ "]*) (.*)$/) {
4682                         # $1 is from_name, which we do not use
4683                         $to_name = unquote($2);
4684                         $to_name =~ s!^b/!!;
4685                 } elsif ($patch_line =~ m/^diff --(cc|combined) ("?.*"?)$/) {
4686                         # $1 is 'cc' or 'combined', which we do not use
4687                         $to_name = unquote($2);
4688                 } else {
4689                         $to_name = undef;
4690                 }
4691
4692                 # check if current patch belong to current raw line
4693                 # and parse raw git-diff line if needed
4694                 if (is_patch_split($diffinfo, { 'to_file' => $to_name })) {
4695                         # this is continuation of a split patch
4696                         print "<div class=\"patch cont\">\n";
4697                 } else {
4698                         # advance raw git-diff output if needed
4699                         $patch_idx++ if defined $diffinfo;
4700
4701                         # read and prepare patch information
4702                         $diffinfo = parsed_difftree_line($difftree->[$patch_idx]);
4703
4704                         # compact combined diff output can have some patches skipped
4705                         # find which patch (using pathname of result) we are at now;
4706                         if ($is_combined) {
4707                                 while ($to_name ne $diffinfo->{'to_file'}) {
4708                                         print "<div class=\"patch\" id=\"patch". ($patch_idx+1) ."\">\n" .
4709                                               format_diff_cc_simplified($diffinfo, @hash_parents) .
4710                                               "</div>\n";  # class="patch"
4711
4712                                         $patch_idx++;
4713                                         $patch_number++;
4714
4715                                         last if $patch_idx > $#$difftree;
4716                                         $diffinfo = parsed_difftree_line($difftree->[$patch_idx]);
4717                                 }
4718                         }
4719
4720                         # modifies %from, %to hashes
4721                         parse_from_to_diffinfo($diffinfo, \%from, \%to, @hash_parents);
4722
4723                         # this is first patch for raw difftree line with $patch_idx index
4724                         # we index @$difftree array from 0, but number patches from 1
4725                         print "<div class=\"patch\" id=\"patch". ($patch_idx+1) ."\">\n";
4726                 }
4727
4728                 # git diff header
4729                 #assert($patch_line =~ m/^diff /) if DEBUG;
4730                 #assert($patch_line !~ m!$/$!) if DEBUG; # is chomp-ed
4731                 $patch_number++;
4732                 # print "git diff" header
4733                 print format_git_diff_header_line($patch_line, $diffinfo,
4734                                                   \%from, \%to);
4735
4736                 # print extended diff header
4737                 print "<div class=\"diff extended_header\">\n";
4738         EXTENDED_HEADER:
4739                 while ($patch_line = <$fd>) {
4740                         chomp $patch_line;
4741
4742                         last EXTENDED_HEADER if ($patch_line =~ m/^--- |^diff /);
4743
4744                         print format_extended_diff_header_line($patch_line, $diffinfo,
4745                                                                \%from, \%to);
4746                 }
4747                 print "</div>\n"; # class="diff extended_header"
4748
4749                 # from-file/to-file diff header
4750                 if (! $patch_line) {
4751                         print "</div>\n"; # class="patch"
4752                         last PATCH;
4753                 }
4754                 next PATCH if ($patch_line =~ m/^diff /);
4755                 #assert($patch_line =~ m/^---/) if DEBUG;
4756
4757                 my $last_patch_line = $patch_line;
4758                 $patch_line = <$fd>;
4759                 chomp $patch_line;
4760                 #assert($patch_line =~ m/^\+\+\+/) if DEBUG;
4761
4762                 print format_diff_from_to_header($last_patch_line, $patch_line,
4763                                                  $diffinfo, \%from, \%to,
4764                                                  @hash_parents);
4765
4766                 # the patch itself
4767         LINE:
4768                 while ($patch_line = <$fd>) {
4769                         chomp $patch_line;
4770
4771                         next PATCH if ($patch_line =~ m/^diff /);
4772
4773                         print format_diff_line($patch_line, \%from, \%to);
4774                 }
4775
4776         } continue {
4777                 print "</div>\n"; # class="patch"
4778         }
4779
4780         # for compact combined (--cc) format, with chunk and patch simplification
4781         # the patchset might be empty, but there might be unprocessed raw lines
4782         for (++$patch_idx if $patch_number > 0;
4783              $patch_idx < @$difftree;
4784              ++$patch_idx) {
4785                 # read and prepare patch information
4786                 $diffinfo = parsed_difftree_line($difftree->[$patch_idx]);
4787
4788                 # generate anchor for "patch" links in difftree / whatchanged part
4789                 print "<div class=\"patch\" id=\"patch". ($patch_idx+1) ."\">\n" .
4790                       format_diff_cc_simplified($diffinfo, @hash_parents) .
4791                       "</div>\n";  # class="patch"
4792
4793                 $patch_number++;
4794         }
4795
4796         if ($patch_number == 0) {
4797                 if (@hash_parents > 1) {
4798                         print "<div class=\"diff nodifferences\">Trivial merge</div>\n";
4799                 } else {
4800                         print "<div class=\"diff nodifferences\">No differences found</div>\n";
4801                 }
4802         }
4803
4804         print "</div>\n"; # class="patchset"
4805 }
4806
4807 # . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
4808
4809 # fills project list info (age, description, owner, forks) for each
4810 # project in the list, removing invalid projects from returned list
4811 # NOTE: modifies $projlist, but does not remove entries from it
4812 sub fill_project_list_info {
4813         my $projlist = shift;
4814         my @projects;
4815
4816         my $show_ctags = gitweb_check_feature('ctags');
4817  PROJECT:
4818         foreach my $pr (@$projlist) {
4819                 my (@activity) = git_get_last_activity($pr->{'path'});
4820                 unless (@activity) {
4821                         next PROJECT;
4822                 }
4823                 ($pr->{'age'}, $pr->{'age_string'}) = @activity;
4824                 if (!defined $pr->{'descr'}) {
4825                         my $descr = git_get_project_description($pr->{'path'}) || "";
4826                         $descr = to_utf8($descr);
4827                         $pr->{'descr_long'} = $descr;
4828                         $pr->{'descr'} = chop_str($descr, $projects_list_description_width, 5);
4829                 }
4830                 if (!defined $pr->{'owner'}) {
4831                         $pr->{'owner'} = git_get_project_owner("$pr->{'path'}") || "";
4832                 }
4833                 if ($show_ctags) {
4834                         $pr->{'ctags'} = git_get_project_ctags($pr->{'path'});
4835                 }
4836                 push @projects, $pr;
4837         }
4838
4839         return @projects;
4840 }
4841
4842 sub sort_projects_list {
4843         my ($projlist, $order) = @_;
4844         my @projects;
4845
4846         my %order_info = (
4847                 project => { key => 'path', type => 'str' },
4848                 descr => { key => 'descr_long', type => 'str' },
4849                 owner => { key => 'owner', type => 'str' },
4850                 age => { key => 'age', type => 'num' }
4851         );
4852         my $oi = $order_info{$order};
4853         return @$projlist unless defined $oi;
4854         if ($oi->{'type'} eq 'str') {
4855                 @projects = sort {$a->{$oi->{'key'}} cmp $b->{$oi->{'key'}}} @$projlist;
4856         } else {
4857                 @projects = sort {$a->{$oi->{'key'}} <=> $b->{$oi->{'key'}}} @$projlist;
4858         }
4859
4860         return @projects;
4861 }
4862
4863 # print 'sort by' <th> element, generating 'sort by $name' replay link
4864 # if that order is not selected
4865 sub print_sort_th {
4866         print format_sort_th(@_);
4867 }
4868
4869 sub format_sort_th {
4870         my ($name, $order, $header) = @_;
4871         my $sort_th = "";
4872         $header ||= ucfirst($name);
4873
4874         if ($order eq $name) {
4875                 $sort_th .= "<th>$header</th>\n";
4876         } else {
4877                 $sort_th .= "<th>" .
4878                             $cgi->a({-href => href(-replay=>1, order=>$name),
4879                                      -class => "header"}, $header) .
4880                             "</th>\n";
4881         }
4882
4883         return $sort_th;
4884 }
4885
4886 sub git_project_list_body {
4887         # actually uses global variable $project
4888         my ($projlist, $order, $from, $to, $extra, $no_header) = @_;
4889         my @projects = @$projlist;
4890
4891         my $check_forks = gitweb_check_feature('forks');
4892         my $show_ctags  = gitweb_check_feature('ctags');
4893         my $tagfilter = $show_ctags ? $cgi->param('by_tag') : undef;
4894         $check_forks = undef
4895                 if ($tagfilter || $searchtext);
4896
4897         # filtering out forks before filling info allows to do less work
4898         @projects = filter_forks_from_projects_list(\@projects)
4899                 if ($check_forks);
4900         @projects = fill_project_list_info(\@projects);
4901         # searching projects require filling to be run before it
4902         @projects = search_projects_list(\@projects,
4903                                          'searchtext' => $searchtext,
4904                                          'tagfilter'  => $tagfilter)
4905                 if ($tagfilter || $searchtext);
4906
4907         $order ||= $default_projects_order;
4908         $from = 0 unless defined $from;
4909         $to = $#projects if (!defined $to || $#projects < $to);
4910
4911         # short circuit
4912         if ($from > $to) {
4913                 print "<center>\n".
4914                       "<b>No such projects found</b><br />\n".
4915                       "Click ".$cgi->a({-href=>href(project=>undef)},"here")." to view all projects<br />\n".
4916                       "</center>\n<br />\n";
4917                 return;
4918         }
4919
4920         @projects = sort_projects_list(\@projects, $order);
4921
4922         if ($show_ctags) {
4923                 my %ctags;
4924                 foreach my $p (@projects) {
4925                         foreach my $ct (keys %{$p->{'ctags'}}) {
4926                                 $ctags{$ct} += $p->{'ctags'}->{$ct};
4927                         }
4928                 }
4929                 my $cloud = git_populate_project_tagcloud(\%ctags);
4930                 print git_show_project_tagcloud($cloud, 64);
4931         }
4932
4933         print "<table class=\"project_list\">\n";
4934         unless ($no_header) {
4935                 print "<tr>\n";
4936                 if ($check_forks) {
4937                         print "<th></th>\n";
4938                 }
4939                 print_sort_th('project', $order, 'Project');
4940                 print_sort_th('descr', $order, 'Description');
4941                 print_sort_th('owner', $order, 'Owner');
4942                 print_sort_th('age', $order, 'Last Change');
4943                 print "<th></th>\n" . # for links
4944                       "</tr>\n";
4945         }
4946         my $alternate = 1;
4947         for (my $i = $from; $i <= $to; $i++) {
4948                 my $pr = $projects[$i];
4949
4950                 if ($alternate) {
4951                         print "<tr class=\"dark\">\n";
4952                 } else {
4953                         print "<tr class=\"light\">\n";
4954                 }
4955                 $alternate ^= 1;
4956
4957                 if ($check_forks) {
4958                         print "<td>";
4959                         if ($pr->{'forks'}) {
4960                                 my $nforks = scalar @{$pr->{'forks'}};
4961                                 if ($nforks > 0) {
4962                                         print $cgi->a({-href => href(project=>$pr->{'path'}, action=>"forks"),
4963                                                        -title => "$nforks forks"}, "+");
4964                                 } else {
4965                                         print $cgi->span({-title => "$nforks forks"}, "+");
4966                                 }
4967                         }
4968                         print "</td>\n";
4969                 }
4970                 print "<td>" . $cgi->a({-href => href(project=>$pr->{'path'}, action=>"summary"),
4971                                         -class => "list"}, esc_html($pr->{'path'})) . "</td>\n" .
4972                       "<td>" . $cgi->a({-href => href(project=>$pr->{'path'}, action=>"summary"),
4973                                         -class => "list", -title => $pr->{'descr_long'}},
4974                                         esc_html($pr->{'descr'})) . "</td>\n" .
4975                       "<td><i>" . chop_and_escape_str($pr->{'owner'}, 15) . "</i></td>\n";
4976                 print "<td class=\"". age_class($pr->{'age'}) . "\">" .
4977                       (defined $pr->{'age_string'} ? $pr->{'age_string'} : "No commits") . "</td>\n" .
4978                       "<td class=\"link\">" .
4979                       $cgi->a({-href => href(project=>$pr->{'path'}, action=>"summary")}, "summary")   . " | " .
4980                       $cgi->a({-href => href(project=>$pr->{'path'}, action=>"shortlog")}, "shortlog") . " | " .
4981                       $cgi->a({-href => href(project=>$pr->{'path'}, action=>"log")}, "log") . " | " .
4982                       $cgi->a({-href => href(project=>$pr->{'path'}, action=>"tree")}, "tree") .
4983                       ($pr->{'forks'} ? " | " . $cgi->a({-href => href(project=>$pr->{'path'}, action=>"forks")}, "forks") : '') .
4984                       "</td>\n" .
4985                       "</tr>\n";
4986         }
4987         if (defined $extra) {
4988                 print "<tr>\n";
4989                 if ($check_forks) {
4990                         print "<td></td>\n";
4991                 }
4992                 print "<td colspan=\"5\">$extra</td>\n" .
4993                       "</tr>\n";
4994         }
4995         print "</table>\n";
4996 }
4997
4998 sub git_log_body {
4999         # uses global variable $project
5000         my ($commitlist, $from, $to, $refs, $extra) = @_;
5001
5002         $from = 0 unless defined $from;
5003         $to = $#{$commitlist} if (!defined $to || $#{$commitlist} < $to);
5004
5005         for (my $i = 0; $i <= $to; $i++) {
5006                 my %co = %{$commitlist->[$i]};
5007                 next if !%co;
5008                 my $commit = $co{'id'};
5009                 my $ref = format_ref_marker($refs, $commit);
5010                 git_print_header_div('commit',
5011                                "<span class=\"age\">$co{'age_string'}</span>" .
5012                                esc_html($co{'title'}) . $ref,
5013                                $commit);
5014                 print "<div class=\"title_text\">\n" .
5015                       "<div class=\"log_link\">\n" .
5016                       $cgi->a({-href => href(action=>"commit", hash=>$commit)}, "commit") .
5017                       " | " .
5018                       $cgi->a({-href => href(action=>"commitdiff", hash=>$commit)}, "commitdiff") .
5019                       " | " .
5020                       $cgi->a({-href => href(action=>"tree", hash=>$commit, hash_base=>$commit)}, "tree") .
5021                       "<br/>\n" .
5022                       "</div>\n";
5023                       git_print_authorship(\%co, -tag => 'span');
5024                       print "<br/>\n</div>\n";
5025
5026                 print "<div class=\"log_body\">\n";
5027                 git_print_log($co{'comment'}, -final_empty_line=> 1);
5028                 print "</div>\n";
5029         }
5030         if ($extra) {
5031                 print "<div class=\"page_nav\">\n";
5032                 print "$extra\n";
5033                 print "</div>\n";
5034         }
5035 }
5036
5037 sub git_shortlog_body {
5038         # uses global variable $project
5039         my ($commitlist, $from, $to, $refs, $extra) = @_;
5040
5041         $from = 0 unless defined $from;
5042         $to = $#{$commitlist} if (!defined $to || $#{$commitlist} < $to);
5043
5044         print "<table class=\"shortlog\">\n";
5045         my $alternate = 1;
5046         for (my $i = $from; $i <= $to; $i++) {
5047                 my %co = %{$commitlist->[$i]};
5048                 my $commit = $co{'id'};
5049                 my $ref = format_ref_marker($refs, $commit);
5050                 if ($alternate) {
5051                         print "<tr class=\"dark\">\n";
5052                 } else {
5053                         print "<tr class=\"light\">\n";
5054                 }
5055                 $alternate ^= 1;
5056                 # git_summary() used print "<td><i>$co{'age_string'}</i></td>\n" .
5057                 print "<td title=\"$co{'age_string_age'}\"><i>$co{'age_string_date'}</i></td>\n" .
5058                       format_author_html('td', \%co, 10) . "<td>";
5059                 print format_subject_html($co{'title'}, $co{'title_short'},
5060                                           href(action=>"commit", hash=>$commit), $ref);
5061                 print "</td>\n" .
5062                       "<td class=\"link\">" .
5063                       $cgi->a({-href => href(action=>"commit", hash=>$commit)}, "commit") . " | " .
5064                       $cgi->a({-href => href(action=>"commitdiff", hash=>$commit)}, "commitdiff") . " | " .
5065                       $cgi->a({-href => href(action=>"tree", hash=>$commit, hash_base=>$commit)}, "tree");
5066                 my $snapshot_links = format_snapshot_links($commit);
5067                 if (defined $snapshot_links) {
5068                         print " | " . $snapshot_links;
5069                 }
5070                 print "</td>\n" .
5071                       "</tr>\n";
5072         }
5073         if (defined $extra) {
5074                 print "<tr>\n" .
5075                       "<td colspan=\"4\">$extra</td>\n" .
5076                       "</tr>\n";
5077         }
5078         print "</table>\n";
5079 }
5080
5081 sub git_history_body {
5082         # Warning: assumes constant type (blob or tree) during history
5083         my ($commitlist, $from, $to, $refs, $extra,
5084             $file_name, $file_hash, $ftype) = @_;
5085
5086         $from = 0 unless defined $from;
5087         $to = $#{$commitlist} unless (defined $to && $to <= $#{$commitlist});
5088
5089         print "<table class=\"history\">\n";
5090         my $alternate = 1;
5091         for (my $i = $from; $i <= $to; $i++) {
5092                 my %co = %{$commitlist->[$i]};
5093                 if (!%co) {
5094                         next;
5095                 }
5096                 my $commit = $co{'id'};
5097
5098                 my $ref = format_ref_marker($refs, $commit);
5099
5100                 if ($alternate) {
5101                         print "<tr class=\"dark\">\n";
5102                 } else {
5103                         print "<tr class=\"light\">\n";
5104                 }
5105                 $alternate ^= 1;
5106                 print "<td title=\"$co{'age_string_age'}\"><i>$co{'age_string_date'}</i></td>\n" .
5107         # shortlog:   format_author_html('td', \%co, 10)
5108                       format_author_html('td', \%co, 15, 3) . "<td>";
5109                 # originally git_history used chop_str($co{'title'}, 50)
5110                 print format_subject_html($co{'title'}, $co{'title_short'},
5111                                           href(action=>"commit", hash=>$commit), $ref);
5112                 print "</td>\n" .
5113                       "<td class=\"link\">" .
5114                       $cgi->a({-href => href(action=>$ftype, hash_base=>$commit, file_name=>$file_name)}, $ftype) . " | " .
5115                       $cgi->a({-href => href(action=>"commitdiff", hash=>$commit)}, "commitdiff");
5116
5117                 if ($ftype eq 'blob') {
5118                         my $blob_current = $file_hash;
5119                         my $blob_parent  = git_get_hash_by_path($commit, $file_name);
5120                         if (defined $blob_current && defined $blob_parent &&
5121                                         $blob_current ne $blob_parent) {
5122                                 print " | " .
5123                                         $cgi->a({-href => href(action=>"blobdiff",
5124                                                                hash=>$blob_current, hash_parent=>$blob_parent,
5125                                                                hash_base=>$hash_base, hash_parent_base=>$commit,
5126                                                                file_name=>$file_name)},
5127                                                 "diff to current");
5128                         }
5129                 }
5130                 print "</td>\n" .
5131                       "</tr>\n";
5132         }
5133         if (defined $extra) {
5134                 print "<tr>\n" .
5135                       "<td colspan=\"4\">$extra</td>\n" .
5136                       "</tr>\n";
5137         }
5138         print "</table>\n";
5139 }
5140
5141 sub git_tags_body {
5142         # uses global variable $project
5143         my ($taglist, $from, $to, $extra) = @_;
5144         $from = 0 unless defined $from;
5145         $to = $#{$taglist} if (!defined $to || $#{$taglist} < $to);
5146
5147         print "<table class=\"tags\">\n";
5148         my $alternate = 1;
5149         for (my $i = $from; $i <= $to; $i++) {
5150                 my $entry = $taglist->[$i];
5151                 my %tag = %$entry;
5152                 my $comment = $tag{'subject'};
5153                 my $comment_short;
5154                 if (defined $comment) {
5155                         $comment_short = chop_str($comment, 30, 5);
5156                 }
5157                 if ($alternate) {
5158                         print "<tr class=\"dark\">\n";
5159                 } else {
5160                         print "<tr class=\"light\">\n";
5161                 }
5162                 $alternate ^= 1;
5163                 if (defined $tag{'age'}) {
5164                         print "<td><i>$tag{'age'}</i></td>\n";
5165                 } else {
5166                         print "<td></td>\n";
5167                 }
5168                 print "<td>" .
5169                       $cgi->a({-href => href(action=>$tag{'reftype'}, hash=>$tag{'refid'}),
5170                                -class => "list name"}, esc_html($tag{'name'})) .
5171                       "</td>\n" .
5172                       "<td>";
5173                 if (defined $comment) {
5174                         print format_subject_html($comment, $comment_short,
5175                                                   href(action=>"tag", hash=>$tag{'id'}));
5176                 }
5177                 print "</td>\n" .
5178                       "<td class=\"selflink\">";
5179                 if ($tag{'type'} eq "tag") {
5180                         print $cgi->a({-href => href(action=>"tag", hash=>$tag{'id'})}, "tag");
5181                 } else {
5182                         print "&nbsp;";
5183                 }
5184                 print "</td>\n" .
5185                       "<td class=\"link\">" . " | " .
5186                       $cgi->a({-href => href(action=>$tag{'reftype'}, hash=>$tag{'refid'})}, $tag{'reftype'});
5187                 if ($tag{'reftype'} eq "commit") {
5188                         print " | " . $cgi->a({-href => href(action=>"shortlog", hash=>$tag{'fullname'})}, "shortlog") .
5189                               " | " . $cgi->a({-href => href(action=>"log", hash=>$tag{'fullname'})}, "log");
5190                 } elsif ($tag{'reftype'} eq "blob") {
5191                         print " | " . $cgi->a({-href => href(action=>"blob_plain", hash=>$tag{'refid'})}, "raw");
5192                 }
5193                 print "</td>\n" .
5194                       "</tr>";
5195         }
5196         if (defined $extra) {
5197                 print "<tr>\n" .
5198                       "<td colspan=\"5\">$extra</td>\n" .
5199                       "</tr>\n";
5200         }
5201         print "</table>\n";
5202 }
5203
5204 sub git_heads_body {
5205         # uses global variable $project
5206         my ($headlist, $head, $from, $to, $extra) = @_;
5207         $from = 0 unless defined $from;
5208         $to = $#{$headlist} if (!defined $to || $#{$headlist} < $to);
5209
5210         print "<table class=\"heads\">\n";
5211         my $alternate = 1;
5212         for (my $i = $from; $i <= $to; $i++) {
5213                 my $entry = $headlist->[$i];
5214                 my %ref = %$entry;
5215                 my $curr = $ref{'id'} eq $head;
5216                 if ($alternate) {
5217                         print "<tr class=\"dark\">\n";
5218                 } else {
5219                         print "<tr class=\"light\">\n";
5220                 }
5221                 $alternate ^= 1;
5222                 print "<td><i>$ref{'age'}</i></td>\n" .
5223                       ($curr ? "<td class=\"current_head\">" : "<td>") .
5224                       $cgi->a({-href => href(action=>"shortlog", hash=>$ref{'fullname'}),
5225                                -class => "list name"},esc_html($ref{'name'})) .
5226                       "</td>\n" .
5227                       "<td class=\"link\">" .
5228                       $cgi->a({-href => href(action=>"shortlog", hash=>$ref{'fullname'})}, "shortlog") . " | " .
5229                       $cgi->a({-href => href(action=>"log", hash=>$ref{'fullname'})}, "log") . " | " .
5230                       $cgi->a({-href => href(action=>"tree", hash=>$ref{'fullname'}, hash_base=>$ref{'fullname'})}, "tree") .
5231                       "</td>\n" .
5232                       "</tr>";
5233         }
5234         if (defined $extra) {
5235                 print "<tr>\n" .
5236                       "<td colspan=\"3\">$extra</td>\n" .
5237                       "</tr>\n";
5238         }
5239         print "</table>\n";
5240 }
5241
5242 # Display a single remote block
5243 sub git_remote_block {
5244         my ($remote, $rdata, $limit, $head) = @_;
5245
5246         my $heads = $rdata->{'heads'};
5247         my $fetch = $rdata->{'fetch'};
5248         my $push = $rdata->{'push'};
5249
5250         my $urls_table = "<table class=\"projects_list\">\n" ;
5251
5252         if (defined $fetch) {
5253                 if ($fetch eq $push) {
5254                         $urls_table .= format_repo_url("URL", $fetch);
5255                 } else {
5256                         $urls_table .= format_repo_url("Fetch URL", $fetch);
5257                         $urls_table .= format_repo_url("Push URL", $push) if defined $push;
5258                 }
5259         } elsif (defined $push) {
5260                 $urls_table .= format_repo_url("Push URL", $push);
5261         } else {
5262                 $urls_table .= format_repo_url("", "No remote URL");
5263         }
5264
5265         $urls_table .= "</table>\n";
5266
5267         my $dots;
5268         if (defined $limit && $limit < @$heads) {
5269                 $dots = $cgi->a({-href => href(action=>"remotes", hash=>$remote)}, "...");
5270         }
5271
5272         print $urls_table;
5273         git_heads_body($heads, $head, 0, $limit, $dots);
5274 }
5275
5276 # Display a list of remote names with the respective fetch and push URLs
5277 sub git_remotes_list {
5278         my ($remotedata, $limit) = @_;
5279         print "<table class=\"heads\">\n";
5280         my $alternate = 1;
5281         my @remotes = sort keys %$remotedata;
5282
5283         my $limited = $limit && $limit < @remotes;
5284
5285         $#remotes = $limit - 1 if $limited;
5286
5287         while (my $remote = shift @remotes) {
5288                 my $rdata = $remotedata->{$remote};
5289                 my $fetch = $rdata->{'fetch'};
5290                 my $push = $rdata->{'push'};
5291                 if ($alternate) {
5292                         print "<tr class=\"dark\">\n";
5293                 } else {
5294                         print "<tr class=\"light\">\n";
5295                 }
5296                 $alternate ^= 1;
5297                 print "<td>" .
5298                       $cgi->a({-href=> href(action=>'remotes', hash=>$remote),
5299                                -class=> "list name"},esc_html($remote)) .
5300                       "</td>";
5301                 print "<td class=\"link\">" .
5302                       (defined $fetch ? $cgi->a({-href=> $fetch}, "fetch") : "fetch") .
5303                       " | " .
5304                       (defined $push ? $cgi->a({-href=> $push}, "push") : "push") .
5305                       "</td>";
5306
5307                 print "</tr>\n";
5308         }
5309
5310         if ($limited) {
5311                 print "<tr>\n" .
5312                       "<td colspan=\"3\">" .
5313                       $cgi->a({-href => href(action=>"remotes")}, "...") .
5314                       "</td>\n" . "</tr>\n";
5315         }
5316
5317         print "</table>";
5318 }
5319
5320 # Display remote heads grouped by remote, unless there are too many
5321 # remotes, in which case we only display the remote names
5322 sub git_remotes_body {
5323         my ($remotedata, $limit, $head) = @_;
5324         if ($limit and $limit < keys %$remotedata) {
5325                 git_remotes_list($remotedata, $limit);
5326         } else {
5327                 fill_remote_heads($remotedata);
5328                 while (my ($remote, $rdata) = each %$remotedata) {
5329                         git_print_section({-class=>"remote", -id=>$remote},
5330                                 ["remotes", $remote, $remote], sub {
5331                                         git_remote_block($remote, $rdata, $limit, $head);
5332                                 });
5333                 }
5334         }
5335 }
5336
5337 sub git_search_grep_body {
5338         my ($commitlist, $from, $to, $extra) = @_;
5339         $from = 0 unless defined $from;
5340         $to = $#{$commitlist} if (!defined $to || $#{$commitlist} < $to);
5341
5342         print "<table class=\"commit_search\">\n";
5343         my $alternate = 1;
5344         for (my $i = $from; $i <= $to; $i++) {
5345                 my %co = %{$commitlist->[$i]};
5346                 if (!%co) {
5347                         next;
5348                 }
5349                 my $commit = $co{'id'};
5350                 if ($alternate) {
5351                         print "<tr class=\"dark\">\n";
5352                 } else {
5353                         print "<tr class=\"light\">\n";
5354                 }
5355                 $alternate ^= 1;
5356                 print "<td title=\"$co{'age_string_age'}\"><i>$co{'age_string_date'}</i></td>\n" .
5357                       format_author_html('td', \%co, 15, 5) .
5358                       "<td>" .
5359                       $cgi->a({-href => href(action=>"commit", hash=>$co{'id'}),
5360                                -class => "list subject"},
5361                               chop_and_escape_str($co{'title'}, 50) . "<br/>");
5362                 my $comment = $co{'comment'};
5363                 foreach my $line (@$comment) {
5364                         if ($line =~ m/^(.*?)($search_regexp)(.*)$/i) {
5365                                 my ($lead, $match, $trail) = ($1, $2, $3);
5366                                 $match = chop_str($match, 70, 5, 'center');
5367                                 my $contextlen = int((80 - length($match))/2);
5368                                 $contextlen = 30 if ($contextlen > 30);
5369                                 $lead  = chop_str($lead,  $contextlen, 10, 'left');
5370                                 $trail = chop_str($trail, $contextlen, 10, 'right');
5371
5372                                 $lead  = esc_html($lead);
5373                                 $match = esc_html($match);
5374                                 $trail = esc_html($trail);
5375
5376                                 print "$lead<span class=\"match\">$match</span>$trail<br />";
5377                         }
5378                 }
5379                 print "</td>\n" .
5380                       "<td class=\"link\">" .
5381                       $cgi->a({-href => href(action=>"commit", hash=>$co{'id'})}, "commit") .
5382                       " | " .
5383                       $cgi->a({-href => href(action=>"commitdiff", hash=>$co{'id'})}, "commitdiff") .
5384                       " | " .
5385                       $cgi->a({-href => href(action=>"tree", hash=>$co{'tree'}, hash_base=>$co{'id'})}, "tree");
5386                 print "</td>\n" .
5387                       "</tr>\n";
5388         }
5389         if (defined $extra) {
5390                 print "<tr>\n" .
5391                       "<td colspan=\"3\">$extra</td>\n" .
5392                       "</tr>\n";
5393         }
5394         print "</table>\n";
5395 }
5396
5397 ## ======================================================================
5398 ## ======================================================================
5399 ## actions
5400
5401 sub git_project_list {
5402         my $order = $input_params{'order'};
5403         if (defined $order && $order !~ m/none|project|descr|owner|age/) {
5404                 die_error(400, "Unknown order parameter");
5405         }
5406
5407         my @list = git_get_projects_list();
5408         if (!@list) {
5409                 die_error(404, "No projects found");
5410         }
5411
5412         git_header_html();
5413         if (defined $home_text && -f $home_text) {
5414                 print "<div class=\"index_include\">\n";
5415                 insert_file($home_text);
5416                 print "</div>\n";
5417         }
5418         print $cgi->startform(-method => "get") .
5419               "<p class=\"projsearch\">Search:\n" .
5420               $cgi->textfield(-name => "s", -value => $searchtext) . "\n" .
5421               "</p>" .
5422               $cgi->end_form() . "\n";
5423         git_project_list_body(\@list, $order);
5424         git_footer_html();
5425 }
5426
5427 sub git_forks {
5428         my $order = $input_params{'order'};
5429         if (defined $order && $order !~ m/none|project|descr|owner|age/) {
5430                 die_error(400, "Unknown order parameter");
5431         }
5432
5433         my @list = git_get_projects_list($project);
5434         if (!@list) {
5435                 die_error(404, "No forks found");
5436         }
5437
5438         git_header_html();
5439         git_print_page_nav('','');
5440         git_print_header_div('summary', "$project forks");
5441         git_project_list_body(\@list, $order);
5442         git_footer_html();
5443 }
5444
5445 sub git_project_index {
5446         my @projects = git_get_projects_list();
5447         if (!@projects) {
5448                 die_error(404, "No projects found");
5449         }
5450
5451         print $cgi->header(
5452                 -type => 'text/plain',
5453                 -charset => 'utf-8',
5454                 -content_disposition => 'inline; filename="index.aux"');
5455
5456         foreach my $pr (@projects) {
5457                 if (!exists $pr->{'owner'}) {
5458                         $pr->{'owner'} = git_get_project_owner("$pr->{'path'}");
5459                 }
5460
5461                 my ($path, $owner) = ($pr->{'path'}, $pr->{'owner'});
5462                 # quote as in CGI::Util::encode, but keep the slash, and use '+' for ' '
5463                 $path  =~ s/([^a-zA-Z0-9_.\-\/ ])/sprintf("%%%02X", ord($1))/eg;
5464                 $owner =~ s/([^a-zA-Z0-9_.\-\/ ])/sprintf("%%%02X", ord($1))/eg;
5465                 $path  =~ s/ /\+/g;
5466                 $owner =~ s/ /\+/g;
5467
5468                 print "$path $owner\n";
5469         }
5470 }
5471
5472 sub git_summary {
5473         my $descr = git_get_project_description($project) || "none";
5474         my %co = parse_commit("HEAD");
5475         my %cd = %co ? parse_date($co{'committer_epoch'}, $co{'committer_tz'}) : ();
5476         my $head = $co{'id'};
5477         my $remote_heads = gitweb_check_feature('remote_heads');
5478
5479         my $owner = git_get_project_owner($project);
5480
5481         my $refs = git_get_references();
5482         # These get_*_list functions return one more to allow us to see if
5483         # there are more ...
5484         my @taglist  = git_get_tags_list(16);
5485         my @headlist = git_get_heads_list(16);
5486         my %remotedata = $remote_heads ? git_get_remotes_list() : ();
5487         my @forklist;
5488         my $check_forks = gitweb_check_feature('forks');
5489
5490         if ($check_forks) {
5491                 # find forks of a project
5492                 @forklist = git_get_projects_list($project);
5493                 # filter out forks of forks
5494                 @forklist = filter_forks_from_projects_list(\@forklist)
5495                         if (@forklist);
5496         }
5497
5498         git_header_html();
5499         git_print_page_nav('summary','', $head);
5500
5501         print "<div class=\"title\">&nbsp;</div>\n";
5502         print "<table class=\"projects_list\">\n" .
5503               "<tr id=\"metadata_desc\"><td>description</td><td>" . esc_html($descr) . "</td></tr>\n" .
5504               "<tr id=\"metadata_owner\"><td>owner</td><td>" . esc_html($owner) . "</td></tr>\n";
5505         if (defined $cd{'rfc2822'}) {
5506                 print "<tr id=\"metadata_lchange\"><td>last change</td><td>$cd{'rfc2822'}</td></tr>\n";
5507         }
5508
5509         # use per project git URL list in $projectroot/$project/cloneurl
5510         # or make project git URL from git base URL and project name
5511         my $url_tag = "URL";
5512         my @url_list = git_get_project_url_list($project);
5513         @url_list = map { "$_/$project" } @git_base_url_list unless @url_list;
5514         foreach my $git_url (@url_list) {
5515                 next unless $git_url;
5516                 print format_repo_url($url_tag, $git_url);
5517                 $url_tag = "";
5518         }
5519
5520         # Tag cloud
5521         my $show_ctags = gitweb_check_feature('ctags');
5522         if ($show_ctags) {
5523                 my $ctags = git_get_project_ctags($project);
5524                 my $cloud = git_populate_project_tagcloud($ctags);
5525                 print "<tr id=\"metadata_ctags\"><td>Content tags:<br />";
5526                 print "</td>\n<td>" unless %$ctags;
5527                 print "<form action=\"$show_ctags\" method=\"post\"><input type=\"hidden\" name=\"p\" value=\"$project\" />Add: <input type=\"text\" name=\"t\" size=\"8\" /></form>";
5528                 print "</td>\n<td>" if %$ctags;
5529                 print git_show_project_tagcloud($cloud, 48);
5530                 print "</td></tr>";
5531         }
5532
5533         print "</table>\n";
5534
5535         # If XSS prevention is on, we don't include README.html.
5536         # TODO: Allow a readme in some safe format.
5537         if (!$prevent_xss && -s "$projectroot/$project/README.html") {
5538                 print "<div class=\"title\">readme</div>\n" .
5539                       "<div class=\"readme\">\n";
5540                 insert_file("$projectroot/$project/README.html");
5541                 print "\n</div>\n"; # class="readme"
5542         }
5543
5544         # we need to request one more than 16 (0..15) to check if
5545         # those 16 are all
5546         my @commitlist = $head ? parse_commits($head, 17) : ();
5547         if (@commitlist) {
5548                 git_print_header_div('shortlog');
5549                 git_shortlog_body(\@commitlist, 0, 15, $refs,
5550                                   $#commitlist <=  15 ? undef :
5551                                   $cgi->a({-href => href(action=>"shortlog")}, "..."));
5552         }
5553
5554         if (@taglist) {
5555                 git_print_header_div('tags');
5556                 git_tags_body(\@taglist, 0, 15,
5557                               $#taglist <=  15 ? undef :
5558                               $cgi->a({-href => href(action=>"tags")}, "..."));
5559         }
5560
5561         if (@headlist) {
5562                 git_print_header_div('heads');
5563                 git_heads_body(\@headlist, $head, 0, 15,
5564                                $#headlist <= 15 ? undef :
5565                                $cgi->a({-href => href(action=>"heads")}, "..."));
5566         }
5567
5568         if (%remotedata) {
5569                 git_print_header_div('remotes');
5570                 git_remotes_body(\%remotedata, 15, $head);
5571         }
5572
5573         if (@forklist) {
5574                 git_print_header_div('forks');
5575                 git_project_list_body(\@forklist, 'age', 0, 15,
5576                                       $#forklist <= 15 ? undef :
5577                                       $cgi->a({-href => href(action=>"forks")}, "..."),
5578                                       'no_header');
5579         }
5580
5581         git_footer_html();
5582 }
5583
5584 sub git_tag {
5585         my %tag = parse_tag($hash);
5586
5587         if (! %tag) {
5588                 die_error(404, "Unknown tag object");
5589         }
5590
5591         my $head = git_get_head_hash($project);
5592         git_header_html();
5593         git_print_page_nav('','', $head,undef,$head);
5594         git_print_header_div('commit', esc_html($tag{'name'}), $hash);
5595         print "<div class=\"title_text\">\n" .
5596               "<table class=\"object_header\">\n" .
5597               "<tr>\n" .
5598               "<td>object</td>\n" .
5599               "<td>" . $cgi->a({-class => "list", -href => href(action=>$tag{'type'}, hash=>$tag{'object'})},
5600                                $tag{'object'}) . "</td>\n" .
5601               "<td class=\"link\">" . $cgi->a({-href => href(action=>$tag{'type'}, hash=>$tag{'object'})},
5602                                               $tag{'type'}) . "</td>\n" .
5603               "</tr>\n";
5604         if (defined($tag{'author'})) {
5605                 git_print_authorship_rows(\%tag, 'author');
5606         }
5607         print "</table>\n\n" .
5608               "</div>\n";
5609         print "<div class=\"page_body\">";
5610         my $comment = $tag{'comment'};
5611         foreach my $line (@$comment) {
5612                 chomp $line;
5613                 print esc_html($line, -nbsp=>1) . "<br/>\n";
5614         }
5615         print "</div>\n";
5616         git_footer_html();
5617 }
5618
5619 sub git_blame_common {
5620         my $format = shift || 'porcelain';
5621         if ($format eq 'porcelain' && $cgi->param('js')) {
5622                 $format = 'incremental';
5623                 $action = 'blame_incremental'; # for page title etc
5624         }
5625
5626         # permissions
5627         gitweb_check_feature('blame')
5628                 or die_error(403, "Blame view not allowed");
5629
5630         # error checking
5631         die_error(400, "No file name given") unless $file_name;
5632         $hash_base ||= git_get_head_hash($project);
5633         die_error(404, "Couldn't find base commit") unless $hash_base;
5634         my %co = parse_commit($hash_base)
5635                 or die_error(404, "Commit not found");
5636         my $ftype = "blob";
5637         if (!defined $hash) {
5638                 $hash = git_get_hash_by_path($hash_base, $file_name, "blob")
5639                         or die_error(404, "Error looking up file");
5640         } else {
5641                 $ftype = git_get_type($hash);
5642                 if ($ftype !~ "blob") {
5643                         die_error(400, "Object is not a blob");
5644                 }
5645         }
5646
5647         my $fd;
5648         if ($format eq 'incremental') {
5649                 # get file contents (as base)
5650                 open $fd, "-|", git_cmd(), 'cat-file', 'blob', $hash
5651                         or die_error(500, "Open git-cat-file failed");
5652         } elsif ($format eq 'data') {
5653                 # run git-blame --incremental
5654                 open $fd, "-|", git_cmd(), "blame", "--incremental",
5655                         $hash_base, "--", $file_name
5656                         or die_error(500, "Open git-blame --incremental failed");
5657         } else {
5658                 # run git-blame --porcelain
5659                 open $fd, "-|", git_cmd(), "blame", '-p',
5660                         $hash_base, '--', $file_name
5661                         or die_error(500, "Open git-blame --porcelain failed");
5662         }
5663
5664         # incremental blame data returns early
5665         if ($format eq 'data') {
5666                 print $cgi->header(
5667                         -type=>"text/plain", -charset => "utf-8",
5668                         -status=> "200 OK");
5669                 local $| = 1; # output autoflush
5670                 print while <$fd>;
5671                 close $fd
5672                         or print "ERROR $!\n";
5673
5674                 print 'END';
5675                 if (defined $t0 && gitweb_check_feature('timed')) {
5676                         print ' '.
5677                               tv_interval($t0, [ gettimeofday() ]).
5678                               ' '.$number_of_git_cmds;
5679                 }
5680                 print "\n";
5681
5682                 return;
5683         }
5684
5685         # page header
5686         git_header_html();
5687         my $formats_nav =
5688                 $cgi->a({-href => href(action=>"blob", -replay=>1)},
5689                         "blob") .
5690                 " | ";
5691         if ($format eq 'incremental') {
5692                 $formats_nav .=
5693                         $cgi->a({-href => href(action=>"blame", javascript=>0, -replay=>1)},
5694                                 "blame") . " (non-incremental)";
5695         } else {
5696                 $formats_nav .=
5697                         $cgi->a({-href => href(action=>"blame_incremental", -replay=>1)},
5698                                 "blame") . " (incremental)";
5699         }
5700         $formats_nav .=
5701                 " | " .
5702                 $cgi->a({-href => href(action=>"history", -replay=>1)},
5703                         "history") .
5704                 " | " .
5705                 $cgi->a({-href => href(action=>$action, file_name=>$file_name)},
5706                         "HEAD");
5707         git_print_page_nav('','', $hash_base,$co{'tree'},$hash_base, $formats_nav);
5708         git_print_header_div('commit', esc_html($co{'title'}), $hash_base);
5709         git_print_page_path($file_name, $ftype, $hash_base);
5710
5711         # page body
5712         if ($format eq 'incremental') {
5713                 print "<noscript>\n<div class=\"error\"><center><b>\n".
5714                       "This page requires JavaScript to run.\n Use ".
5715                       $cgi->a({-href => href(action=>'blame',javascript=>0,-replay=>1)},
5716                               'this page').
5717                       " instead.\n".
5718                       "</b></center></div>\n</noscript>\n";
5719
5720                 print qq!<div id="progress_bar" style="width: 100%; background-color: yellow"></div>\n!;
5721         }
5722
5723         print qq!<div class="page_body">\n!;
5724         print qq!<div id="progress_info">... / ...</div>\n!
5725                 if ($format eq 'incremental');
5726         print qq!<table id="blame_table" class="blame" width="100%">\n!.
5727               #qq!<col width="5.5em" /><col width="2.5em" /><col width="*" />\n!.
5728               qq!<thead>\n!.
5729               qq!<tr><th>Commit</th><th>Line</th><th>Data</th></tr>\n!.
5730               qq!</thead>\n!.
5731               qq!<tbody>\n!;
5732
5733         my @rev_color = qw(light dark);
5734         my $num_colors = scalar(@rev_color);
5735         my $current_color = 0;
5736
5737         if ($format eq 'incremental') {
5738                 my $color_class = $rev_color[$current_color];
5739
5740                 #contents of a file
5741                 my $linenr = 0;
5742         LINE:
5743                 while (my $line = <$fd>) {
5744                         chomp $line;
5745                         $linenr++;
5746
5747                         print qq!<tr id="l$linenr" class="$color_class">!.
5748                               qq!<td class="sha1"><a href=""> </a></td>!.
5749                               qq!<td class="linenr">!.
5750                               qq!<a class="linenr" href="">$linenr</a></td>!;
5751                         print qq!<td class="pre">! . esc_html($line) . "</td>\n";
5752                         print qq!</tr>\n!;
5753                 }
5754
5755         } else { # porcelain, i.e. ordinary blame
5756                 my %metainfo = (); # saves information about commits
5757
5758                 # blame data
5759         LINE:
5760                 while (my $line = <$fd>) {
5761                         chomp $line;
5762                         # the header: <SHA-1> <src lineno> <dst lineno> [<lines in group>]
5763                         # no <lines in group> for subsequent lines in group of lines
5764                         my ($full_rev, $orig_lineno, $lineno, $group_size) =
5765                            ($line =~ /^([0-9a-f]{40}) (\d+) (\d+)(?: (\d+))?$/);
5766                         if (!exists $metainfo{$full_rev}) {
5767                                 $metainfo{$full_rev} = { 'nprevious' => 0 };
5768                         }
5769                         my $meta = $metainfo{$full_rev};
5770                         my $data;
5771                         while ($data = <$fd>) {
5772                                 chomp $data;
5773                                 last if ($data =~ s/^\t//); # contents of line
5774                                 if ($data =~ /^(\S+)(?: (.*))?$/) {
5775                                         $meta->{$1} = $2 unless exists $meta->{$1};
5776                                 }
5777                                 if ($data =~ /^previous /) {
5778                                         $meta->{'nprevious'}++;
5779                                 }
5780                         }
5781                         my $short_rev = substr($full_rev, 0, 8);
5782                         my $author = $meta->{'author'};
5783                         my %date =
5784                                 parse_date($meta->{'author-time'}, $meta->{'author-tz'});
5785                         my $date = $date{'iso-tz'};
5786                         if ($group_size) {
5787                                 $current_color = ($current_color + 1) % $num_colors;
5788                         }
5789                         my $tr_class = $rev_color[$current_color];
5790                         $tr_class .= ' boundary' if (exists $meta->{'boundary'});
5791                         $tr_class .= ' no-previous' if ($meta->{'nprevious'} == 0);
5792                         $tr_class .= ' multiple-previous' if ($meta->{'nprevious'} > 1);
5793                         print "<tr id=\"l$lineno\" class=\"$tr_class\">\n";
5794                         if ($group_size) {
5795                                 print "<td class=\"sha1\"";
5796                                 print " title=\"". esc_html($author) . ", $date\"";
5797                                 print " rowspan=\"$group_size\"" if ($group_size > 1);
5798                                 print ">";
5799                                 print $cgi->a({-href => href(action=>"commit",
5800                                                              hash=>$full_rev,
5801                                                              file_name=>$file_name)},
5802                                               esc_html($short_rev));
5803                                 if ($group_size >= 2) {
5804                                         my @author_initials = ($author =~ /\b([[:upper:]])\B/g);
5805                                         if (@author_initials) {
5806                                                 print "<br />" .
5807                                                       esc_html(join('', @author_initials));
5808                                                 #           or join('.', ...)
5809                                         }
5810                                 }
5811                                 print "</td>\n";
5812                         }
5813                         # 'previous' <sha1 of parent commit> <filename at commit>
5814                         if (exists $meta->{'previous'} &&
5815                             $meta->{'previous'} =~ /^([a-fA-F0-9]{40}) (.*)$/) {
5816                                 $meta->{'parent'} = $1;
5817                                 $meta->{'file_parent'} = unquote($2);
5818                         }
5819                         my $linenr_commit =
5820                                 exists($meta->{'parent'}) ?
5821                                 $meta->{'parent'} : $full_rev;
5822                         my $linenr_filename =
5823                                 exists($meta->{'file_parent'}) ?
5824                                 $meta->{'file_parent'} : unquote($meta->{'filename'});
5825                         my $blamed = href(action => 'blame',
5826                                           file_name => $linenr_filename,
5827                                           hash_base => $linenr_commit);
5828                         print "<td class=\"linenr\">";
5829                         print $cgi->a({ -href => "$blamed#l$orig_lineno",
5830                                         -class => "linenr" },
5831                                       esc_html($lineno));
5832                         print "</td>";
5833                         print "<td class=\"pre\">" . esc_html($data) . "</td>\n";
5834                         print "</tr>\n";
5835                 } # end while
5836
5837         }
5838
5839         # footer
5840         print "</tbody>\n".
5841               "</table>\n"; # class="blame"
5842         print "</div>\n";   # class="blame_body"
5843         close $fd
5844                 or print "Reading blob failed\n";
5845
5846         git_footer_html();
5847 }
5848
5849 sub git_blame {
5850         git_blame_common();
5851 }
5852
5853 sub git_blame_incremental {
5854         git_blame_common('incremental');
5855 }
5856
5857 sub git_blame_data {
5858         git_blame_common('data');
5859 }
5860
5861 sub git_tags {
5862         my $head = git_get_head_hash($project);
5863         git_header_html();
5864         git_print_page_nav('','', $head,undef,$head,format_ref_views('tags'));
5865         git_print_header_div('summary', $project);
5866
5867         my @tagslist = git_get_tags_list();
5868         if (@tagslist) {
5869                 git_tags_body(\@tagslist);
5870         }
5871         git_footer_html();
5872 }
5873
5874 sub git_heads {
5875         my $head = git_get_head_hash($project);
5876         git_header_html();
5877         git_print_page_nav('','', $head,undef,$head,format_ref_views('heads'));
5878         git_print_header_div('summary', $project);
5879
5880         my @headslist = git_get_heads_list();
5881         if (@headslist) {
5882                 git_heads_body(\@headslist, $head);
5883         }
5884         git_footer_html();
5885 }
5886
5887 # used both for single remote view and for list of all the remotes
5888 sub git_remotes {
5889         gitweb_check_feature('remote_heads')
5890                 or die_error(403, "Remote heads view is disabled");
5891
5892         my $head = git_get_head_hash($project);
5893         my $remote = $input_params{'hash'};
5894
5895         my $remotedata = git_get_remotes_list($remote);
5896         die_error(500, "Unable to get remote information") unless defined $remotedata;
5897
5898         unless (%$remotedata) {
5899                 die_error(404, defined $remote ?
5900                         "Remote $remote not found" :
5901                         "No remotes found");
5902         }
5903
5904         git_header_html(undef, undef, -action_extra => $remote);
5905         git_print_page_nav('', '',  $head, undef, $head,
5906                 format_ref_views($remote ? '' : 'remotes'));
5907
5908         fill_remote_heads($remotedata);
5909         if (defined $remote) {
5910                 git_print_header_div('remotes', "$remote remote for $project");
5911                 git_remote_block($remote, $remotedata->{$remote}, undef, $head);
5912         } else {
5913                 git_print_header_div('summary', "$project remotes");
5914                 git_remotes_body($remotedata, undef, $head);
5915         }
5916
5917         git_footer_html();
5918 }
5919
5920 sub git_blob_plain {
5921         my $type = shift;
5922         my $expires;
5923
5924         if (!defined $hash) {
5925                 if (defined $file_name) {
5926                         my $base = $hash_base || git_get_head_hash($project);
5927                         $hash = git_get_hash_by_path($base, $file_name, "blob")
5928                                 or die_error(404, "Cannot find file");
5929                 } else {
5930                         die_error(400, "No file name defined");
5931                 }
5932         } elsif ($hash =~ m/^[0-9a-fA-F]{40}$/) {
5933                 # blobs defined by non-textual hash id's can be cached
5934                 $expires = "+1d";
5935         }
5936
5937         open my $fd, "-|", git_cmd(), "cat-file", "blob", $hash
5938                 or die_error(500, "Open git-cat-file blob '$hash' failed");
5939
5940         # content-type (can include charset)
5941         $type = blob_contenttype($fd, $file_name, $type);
5942
5943         # "save as" filename, even when no $file_name is given
5944         my $save_as = "$hash";
5945         if (defined $file_name) {
5946                 $save_as = $file_name;
5947         } elsif ($type =~ m/^text\//) {
5948                 $save_as .= '.txt';
5949         }
5950
5951         # With XSS prevention on, blobs of all types except a few known safe
5952         # ones are served with "Content-Disposition: attachment" to make sure
5953         # they don't run in our security domain.  For certain image types,
5954         # blob view writes an <img> tag referring to blob_plain view, and we
5955         # want to be sure not to break that by serving the image as an
5956         # attachment (though Firefox 3 doesn't seem to care).
5957         my $sandbox = $prevent_xss &&
5958                 $type !~ m!^(?:text/plain|image/(?:gif|png|jpeg))$!;
5959
5960         print $cgi->header(
5961                 -type => $type,
5962                 -expires => $expires,
5963                 -content_disposition =>
5964                         ($sandbox ? 'attachment' : 'inline')
5965                         . '; filename="' . $save_as . '"');
5966         local $/ = undef;
5967         binmode STDOUT, ':raw';
5968         print <$fd>;
5969         binmode STDOUT, ':utf8'; # as set at the beginning of gitweb.cgi
5970         close $fd;
5971 }
5972
5973 sub git_blob {
5974         my $expires;
5975
5976         if (!defined $hash) {
5977                 if (defined $file_name) {
5978                         my $base = $hash_base || git_get_head_hash($project);
5979                         $hash = git_get_hash_by_path($base, $file_name, "blob")
5980                                 or die_error(404, "Cannot find file");
5981                 } else {
5982                         die_error(400, "No file name defined");
5983                 }
5984         } elsif ($hash =~ m/^[0-9a-fA-F]{40}$/) {
5985                 # blobs defined by non-textual hash id's can be cached
5986                 $expires = "+1d";
5987         }
5988
5989         my $have_blame = gitweb_check_feature('blame');
5990         open my $fd, "-|", git_cmd(), "cat-file", "blob", $hash
5991                 or die_error(500, "Couldn't cat $file_name, $hash");
5992         my $mimetype = blob_mimetype($fd, $file_name);
5993         # use 'blob_plain' (aka 'raw') view for files that cannot be displayed
5994         if ($mimetype !~ m!^(?:text/|image/(?:gif|png|jpeg)$)! && -B $fd) {
5995                 close $fd;
5996                 return git_blob_plain($mimetype);
5997         }
5998         # we can have blame only for text/* mimetype
5999         $have_blame &&= ($mimetype =~ m!^text/!);
6000
6001         my $highlight = gitweb_check_feature('highlight');
6002         my $syntax = guess_file_syntax($highlight, $mimetype, $file_name);
6003         $fd = run_highlighter($fd, $highlight, $syntax)
6004                 if $syntax;
6005
6006         git_header_html(undef, $expires);
6007         my $formats_nav = '';
6008         if (defined $hash_base && (my %co = parse_commit($hash_base))) {
6009                 if (defined $file_name) {
6010                         if ($have_blame) {
6011                                 $formats_nav .=
6012                                         $cgi->a({-href => href(action=>"blame", -replay=>1)},
6013                                                 "blame") .
6014                                         " | ";
6015                         }
6016                         $formats_nav .=
6017                                 $cgi->a({-href => href(action=>"history", -replay=>1)},
6018                                         "history") .
6019                                 " | " .
6020                                 $cgi->a({-href => href(action=>"blob_plain", -replay=>1)},
6021                                         "raw") .
6022                                 " | " .
6023                                 $cgi->a({-href => href(action=>"blob",
6024                                                        hash_base=>"HEAD", file_name=>$file_name)},
6025                                         "HEAD");
6026                 } else {
6027                         $formats_nav .=
6028                                 $cgi->a({-href => href(action=>"blob_plain", -replay=>1)},
6029                                         "raw");
6030                 }
6031                 git_print_page_nav('','', $hash_base,$co{'tree'},$hash_base, $formats_nav);
6032                 git_print_header_div('commit', esc_html($co{'title'}), $hash_base);
6033         } else {
6034                 print "<div class=\"page_nav\">\n" .
6035                       "<br/><br/></div>\n" .
6036                       "<div class=\"title\">".esc_html($hash)."</div>\n";
6037         }
6038         git_print_page_path($file_name, "blob", $hash_base);
6039         print "<div class=\"page_body\">\n";
6040         if ($mimetype =~ m!^image/!) {
6041                 print qq!<img type="!.esc_attr($mimetype).qq!"!;
6042                 if ($file_name) {
6043                         print qq! alt="!.esc_attr($file_name).qq!" title="!.esc_attr($file_name).qq!"!;
6044                 }
6045                 print qq! src="! .
6046                       href(action=>"blob_plain", hash=>$hash,
6047                            hash_base=>$hash_base, file_name=>$file_name) .
6048                       qq!" />\n!;
6049         } else {
6050                 my $nr;
6051                 while (my $line = <$fd>) {
6052                         chomp $line;
6053                         $nr++;
6054                         $line = untabify($line);
6055                         printf qq!<div class="pre"><a id="l%i" href="%s#l%i" class="linenr">%4i</a> %s</div>\n!,
6056                                $nr, esc_attr(href(-replay => 1)), $nr, $nr, $syntax ? $line : esc_html($line, -nbsp=>1);
6057                 }
6058         }
6059         close $fd
6060                 or print "Reading blob failed.\n";
6061         print "</div>";
6062         git_footer_html();
6063 }
6064
6065 sub git_tree {
6066         if (!defined $hash_base) {
6067                 $hash_base = "HEAD";
6068         }
6069         if (!defined $hash) {
6070                 if (defined $file_name) {
6071                         $hash = git_get_hash_by_path($hash_base, $file_name, "tree");
6072                 } else {
6073                         $hash = $hash_base;
6074                 }
6075         }
6076         die_error(404, "No such tree") unless defined($hash);
6077
6078         my $show_sizes = gitweb_check_feature('show-sizes');
6079         my $have_blame = gitweb_check_feature('blame');
6080
6081         my @entries = ();
6082         {
6083                 local $/ = "\0";
6084                 open my $fd, "-|", git_cmd(), "ls-tree", '-z',
6085                         ($show_sizes ? '-l' : ()), @extra_options, $hash
6086                         or die_error(500, "Open git-ls-tree failed");
6087                 @entries = map { chomp; $_ } <$fd>;
6088                 close $fd
6089                         or die_error(404, "Reading tree failed");
6090         }
6091
6092         my $refs = git_get_references();
6093         my $ref = format_ref_marker($refs, $hash_base);
6094         git_header_html();
6095         my $basedir = '';
6096         if (defined $hash_base && (my %co = parse_commit($hash_base))) {
6097                 my @views_nav = ();
6098                 if (defined $file_name) {
6099                         push @views_nav,
6100                                 $cgi->a({-href => href(action=>"history", -replay=>1)},
6101                                         "history"),
6102                                 $cgi->a({-href => href(action=>"tree",
6103                                                        hash_base=>"HEAD", file_name=>$file_name)},
6104                                         "HEAD"),
6105                 }
6106                 my $snapshot_links = format_snapshot_links($hash);
6107                 if (defined $snapshot_links) {
6108                         # FIXME: Should be available when we have no hash base as well.
6109                         push @views_nav, $snapshot_links;
6110                 }
6111                 git_print_page_nav('tree','', $hash_base, undef, undef,
6112                                    join(' | ', @views_nav));
6113                 git_print_header_div('commit', esc_html($co{'title'}) . $ref, $hash_base);
6114         } else {
6115                 undef $hash_base;
6116                 print "<div class=\"page_nav\">\n";
6117                 print "<br/><br/></div>\n";
6118                 print "<div class=\"title\">".esc_html($hash)."</div>\n";
6119         }
6120         if (defined $file_name) {
6121                 $basedir = $file_name;
6122                 if ($basedir ne '' && substr($basedir, -1) ne '/') {
6123                         $basedir .= '/';
6124                 }
6125                 git_print_page_path($file_name, 'tree', $hash_base);
6126         }
6127         print "<div class=\"page_body\">\n";
6128         print "<table class=\"tree\">\n";
6129         my $alternate = 1;
6130         # '..' (top directory) link if possible
6131         if (defined $hash_base &&
6132             defined $file_name && $file_name =~ m![^/]+$!) {
6133                 if ($alternate) {
6134                         print "<tr class=\"dark\">\n";
6135                 } else {
6136                         print "<tr class=\"light\">\n";
6137                 }
6138                 $alternate ^= 1;
6139
6140                 my $up = $file_name;
6141                 $up =~ s!/?[^/]+$!!;
6142                 undef $up unless $up;
6143                 # based on git_print_tree_entry
6144                 print '<td class="mode">' . mode_str('040000') . "</td>\n";
6145                 print '<td class="size">&nbsp;</td>'."\n" if $show_sizes;
6146                 print '<td class="list">';
6147                 print $cgi->a({-href => href(action=>"tree",
6148                                              hash_base=>$hash_base,
6149                                              file_name=>$up)},
6150                               "..");
6151                 print "</td>\n";
6152                 print "<td class=\"link\"></td>\n";
6153
6154                 print "</tr>\n";
6155         }
6156         foreach my $line (@entries) {
6157                 my %t = parse_ls_tree_line($line, -z => 1, -l => $show_sizes);
6158
6159                 if ($alternate) {
6160                         print "<tr class=\"dark\">\n";
6161                 } else {
6162                         print "<tr class=\"light\">\n";
6163                 }
6164                 $alternate ^= 1;
6165
6166                 git_print_tree_entry(\%t, $basedir, $hash_base, $have_blame);
6167
6168                 print "</tr>\n";
6169         }
6170         print "</table>\n" .
6171               "</div>";
6172         git_footer_html();
6173 }
6174
6175 sub snapshot_name {
6176         my ($project, $hash) = @_;
6177
6178         # path/to/project.git  -> project
6179         # path/to/project/.git -> project
6180         my $name = to_utf8($project);
6181         $name =~ s,([^/])/*\.git$,$1,;
6182         $name = basename($name);
6183         # sanitize name
6184         $name =~ s/[[:cntrl:]]/?/g;
6185
6186         my $ver = $hash;
6187         if ($hash =~ /^[0-9a-fA-F]+$/) {
6188                 # shorten SHA-1 hash
6189                 my $full_hash = git_get_full_hash($project, $hash);
6190                 if ($full_hash =~ /^$hash/ && length($hash) > 7) {
6191                         $ver = git_get_short_hash($project, $hash);
6192                 }
6193         } elsif ($hash =~ m!^refs/tags/(.*)$!) {
6194                 # tags don't need shortened SHA-1 hash
6195                 $ver = $1;
6196         } else {
6197                 # branches and other need shortened SHA-1 hash
6198                 if ($hash =~ m!^refs/(?:heads|remotes)/(.*)$!) {
6199                         $ver = $1;
6200                 }
6201                 $ver .= '-' . git_get_short_hash($project, $hash);
6202         }
6203         # in case of hierarchical branch names
6204         $ver =~ s!/!.!g;
6205
6206         # name = project-version_string
6207         $name = "$name-$ver";
6208
6209         return wantarray ? ($name, $name) : $name;
6210 }
6211
6212 sub git_snapshot {
6213         my $format = $input_params{'snapshot_format'};
6214         if (!@snapshot_fmts) {
6215                 die_error(403, "Snapshots not allowed");
6216         }
6217         # default to first supported snapshot format
6218         $format ||= $snapshot_fmts[0];
6219         if ($format !~ m/^[a-z0-9]+$/) {
6220                 die_error(400, "Invalid snapshot format parameter");
6221         } elsif (!exists($known_snapshot_formats{$format})) {
6222                 die_error(400, "Unknown snapshot format");
6223         } elsif ($known_snapshot_formats{$format}{'disabled'}) {
6224                 die_error(403, "Snapshot format not allowed");
6225         } elsif (!grep($_ eq $format, @snapshot_fmts)) {
6226                 die_error(403, "Unsupported snapshot format");
6227         }
6228
6229         my $type = git_get_type("$hash^{}");
6230         if (!$type) {
6231                 die_error(404, 'Object does not exist');
6232         }  elsif ($type eq 'blob') {
6233                 die_error(400, 'Object is not a tree-ish');
6234         }
6235
6236         my ($name, $prefix) = snapshot_name($project, $hash);
6237         my $filename = "$name$known_snapshot_formats{$format}{'suffix'}";
6238         my $cmd = quote_command(
6239                 git_cmd(), 'archive',
6240                 "--format=$known_snapshot_formats{$format}{'format'}",
6241                 "--prefix=$prefix/", $hash);
6242         if (exists $known_snapshot_formats{$format}{'compressor'}) {
6243                 $cmd .= ' | ' . quote_command(@{$known_snapshot_formats{$format}{'compressor'}});
6244         }
6245
6246         $filename =~ s/(["\\])/\\$1/g;
6247         print $cgi->header(
6248                 -type => $known_snapshot_formats{$format}{'type'},
6249                 -content_disposition => 'inline; filename="' . $filename . '"',
6250                 -status => '200 OK');
6251
6252         open my $fd, "-|", $cmd
6253                 or die_error(500, "Execute git-archive failed");
6254         binmode STDOUT, ':raw';
6255         print <$fd>;
6256         binmode STDOUT, ':utf8'; # as set at the beginning of gitweb.cgi
6257         close $fd;
6258 }
6259
6260 sub git_log_generic {
6261         my ($fmt_name, $body_subr, $base, $parent, $file_name, $file_hash) = @_;
6262
6263         my $head = git_get_head_hash($project);
6264         if (!defined $base) {
6265                 $base = $head;
6266         }
6267         if (!defined $page) {
6268                 $page = 0;
6269         }
6270         my $refs = git_get_references();
6271
6272         my $commit_hash = $base;
6273         if (defined $parent) {
6274                 $commit_hash = "$parent..$base";
6275         }
6276         my @commitlist =
6277                 parse_commits($commit_hash, 101, (100 * $page),
6278                               defined $file_name ? ($file_name, "--full-history") : ());
6279
6280         my $ftype;
6281         if (!defined $file_hash && defined $file_name) {
6282                 # some commits could have deleted file in question,
6283                 # and not have it in tree, but one of them has to have it
6284                 for (my $i = 0; $i < @commitlist; $i++) {
6285                         $file_hash = git_get_hash_by_path($commitlist[$i]{'id'}, $file_name);
6286                         last if defined $file_hash;
6287                 }
6288         }
6289         if (defined $file_hash) {
6290                 $ftype = git_get_type($file_hash);
6291         }
6292         if (defined $file_name && !defined $ftype) {
6293                 die_error(500, "Unknown type of object");
6294         }
6295         my %co;
6296         if (defined $file_name) {
6297                 %co = parse_commit($base)
6298                         or die_error(404, "Unknown commit object");
6299         }
6300
6301
6302         my $paging_nav = format_paging_nav($fmt_name, $page, $#commitlist >= 100);
6303         my $next_link = '';
6304         if ($#commitlist >= 100) {
6305                 $next_link =
6306                         $cgi->a({-href => href(-replay=>1, page=>$page+1),
6307                                  -accesskey => "n", -title => "Alt-n"}, "next");
6308         }
6309         my $patch_max = gitweb_get_feature('patches');
6310         if ($patch_max && !defined $file_name) {
6311                 if ($patch_max < 0 || @commitlist <= $patch_max) {
6312                         $paging_nav .= " &sdot; " .
6313                                 $cgi->a({-href => href(action=>"patches", -replay=>1)},
6314                                         "patches");
6315                 }
6316         }
6317
6318         git_header_html();
6319         git_print_page_nav($fmt_name,'', $hash,$hash,$hash, $paging_nav);
6320         if (defined $file_name) {
6321                 git_print_header_div('commit', esc_html($co{'title'}), $base);
6322         } else {
6323                 git_print_header_div('summary', $project)
6324         }
6325         git_print_page_path($file_name, $ftype, $hash_base)
6326                 if (defined $file_name);
6327
6328         $body_subr->(\@commitlist, 0, 99, $refs, $next_link,
6329                      $file_name, $file_hash, $ftype);
6330
6331         git_footer_html();
6332 }
6333
6334 sub git_log {
6335         git_log_generic('log', \&git_log_body,
6336                         $hash, $hash_parent);
6337 }
6338
6339 sub git_commit {
6340         $hash ||= $hash_base || "HEAD";
6341         my %co = parse_commit($hash)
6342             or die_error(404, "Unknown commit object");
6343
6344         my $parent  = $co{'parent'};
6345         my $parents = $co{'parents'}; # listref
6346
6347         # we need to prepare $formats_nav before any parameter munging
6348         my $formats_nav;
6349         if (!defined $parent) {
6350                 # --root commitdiff
6351                 $formats_nav .= '(initial)';
6352         } elsif (@$parents == 1) {
6353                 # single parent commit
6354                 $formats_nav .=
6355                         '(parent: ' .
6356                         $cgi->a({-href => href(action=>"commit",
6357                                                hash=>$parent)},
6358                                 esc_html(substr($parent, 0, 7))) .
6359                         ')';
6360         } else {
6361                 # merge commit
6362                 $formats_nav .=
6363                         '(merge: ' .
6364                         join(' ', map {
6365                                 $cgi->a({-href => href(action=>"commit",
6366                                                        hash=>$_)},
6367                                         esc_html(substr($_, 0, 7)));
6368                         } @$parents ) .
6369                         ')';
6370         }
6371         if (gitweb_check_feature('patches') && @$parents <= 1) {
6372                 $formats_nav .= " | " .
6373                         $cgi->a({-href => href(action=>"patch", -replay=>1)},
6374                                 "patch");
6375         }
6376
6377         if (!defined $parent) {
6378                 $parent = "--root";
6379         }
6380         my @difftree;
6381         open my $fd, "-|", git_cmd(), "diff-tree", '-r', "--no-commit-id",
6382                 @diff_opts,
6383                 (@$parents <= 1 ? $parent : '-c'),
6384                 $hash, "--"
6385                 or die_error(500, "Open git-diff-tree failed");
6386         @difftree = map { chomp; $_ } <$fd>;
6387         close $fd or die_error(404, "Reading git-diff-tree failed");
6388
6389         # non-textual hash id's can be cached
6390         my $expires;
6391         if ($hash =~ m/^[0-9a-fA-F]{40}$/) {
6392                 $expires = "+1d";
6393         }
6394         my $refs = git_get_references();
6395         my $ref = format_ref_marker($refs, $co{'id'});
6396
6397         git_header_html(undef, $expires);
6398         git_print_page_nav('commit', '',
6399                            $hash, $co{'tree'}, $hash,
6400                            $formats_nav);
6401
6402         if (defined $co{'parent'}) {
6403                 git_print_header_div('commitdiff', esc_html($co{'title'}) . $ref, $hash);
6404         } else {
6405                 git_print_header_div('tree', esc_html($co{'title'}) . $ref, $co{'tree'}, $hash);
6406         }
6407         print "<div class=\"title_text\">\n" .
6408               "<table class=\"object_header\">\n";
6409         git_print_authorship_rows(\%co);
6410         print "<tr><td>commit</td><td class=\"sha1\">$co{'id'}</td></tr>\n";
6411         print "<tr>" .
6412               "<td>tree</td>" .
6413               "<td class=\"sha1\">" .
6414               $cgi->a({-href => href(action=>"tree", hash=>$co{'tree'}, hash_base=>$hash),
6415                        class => "list"}, $co{'tree'}) .
6416               "</td>" .
6417               "<td class=\"link\">" .
6418               $cgi->a({-href => href(action=>"tree", hash=>$co{'tree'}, hash_base=>$hash)},
6419                       "tree");
6420         my $snapshot_links = format_snapshot_links($hash);
6421         if (defined $snapshot_links) {
6422                 print " | " . $snapshot_links;
6423         }
6424         print "</td>" .
6425               "</tr>\n";
6426
6427         foreach my $par (@$parents) {
6428                 print "<tr>" .
6429                       "<td>parent</td>" .
6430                       "<td class=\"sha1\">" .
6431                       $cgi->a({-href => href(action=>"commit", hash=>$par),
6432                                class => "list"}, $par) .
6433                       "</td>" .
6434                       "<td class=\"link\">" .
6435                       $cgi->a({-href => href(action=>"commit", hash=>$par)}, "commit") .
6436                       " | " .
6437                       $cgi->a({-href => href(action=>"commitdiff", hash=>$hash, hash_parent=>$par)}, "diff") .
6438                       "</td>" .
6439                       "</tr>\n";
6440         }
6441         print "</table>".
6442               "</div>\n";
6443
6444         print "<div class=\"page_body\">\n";
6445         git_print_log($co{'comment'});
6446         print "</div>\n";
6447
6448         git_difftree_body(\@difftree, $hash, @$parents);
6449
6450         git_footer_html();
6451 }
6452
6453 sub git_object {
6454         # object is defined by:
6455         # - hash or hash_base alone
6456         # - hash_base and file_name
6457         my $type;
6458
6459         # - hash or hash_base alone
6460         if ($hash || ($hash_base && !defined $file_name)) {
6461                 my $object_id = $hash || $hash_base;
6462
6463                 open my $fd, "-|", quote_command(
6464                         git_cmd(), 'cat-file', '-t', $object_id) . ' 2> /dev/null'
6465                         or die_error(404, "Object does not exist");
6466                 $type = <$fd>;
6467                 chomp $type;
6468                 close $fd
6469                         or die_error(404, "Object does not exist");
6470
6471         # - hash_base and file_name
6472         } elsif ($hash_base && defined $file_name) {
6473                 $file_name =~ s,/+$,,;
6474
6475                 system(git_cmd(), "cat-file", '-e', $hash_base) == 0
6476                         or die_error(404, "Base object does not exist");
6477
6478                 # here errors should not hapen
6479                 open my $fd, "-|", git_cmd(), "ls-tree", $hash_base, "--", $file_name
6480                         or die_error(500, "Open git-ls-tree failed");
6481                 my $line = <$fd>;
6482                 close $fd;
6483
6484                 #'100644 blob 0fa3f3a66fb6a137f6ec2c19351ed4d807070ffa  panic.c'
6485                 unless ($line && $line =~ m/^([0-9]+) (.+) ([0-9a-fA-F]{40})\t/) {
6486                         die_error(404, "File or directory for given base does not exist");
6487                 }
6488                 $type = $2;
6489                 $hash = $3;
6490         } else {
6491                 die_error(400, "Not enough information to find object");
6492         }
6493
6494         print $cgi->redirect(-uri => href(action=>$type, -full=>1,
6495                                           hash=>$hash, hash_base=>$hash_base,
6496                                           file_name=>$file_name),
6497                              -status => '302 Found');
6498 }
6499
6500 sub git_blobdiff {
6501         my $format = shift || 'html';
6502
6503         my $fd;
6504         my @difftree;
6505         my %diffinfo;
6506         my $expires;
6507
6508         # preparing $fd and %diffinfo for git_patchset_body
6509         # new style URI
6510         if (defined $hash_base && defined $hash_parent_base) {
6511                 if (defined $file_name) {
6512                         # read raw output
6513                         open $fd, "-|", git_cmd(), "diff-tree", '-r', @diff_opts,
6514                                 $hash_parent_base, $hash_base,
6515                                 "--", (defined $file_parent ? $file_parent : ()), $file_name
6516                                 or die_error(500, "Open git-diff-tree failed");
6517                         @difftree = map { chomp; $_ } <$fd>;
6518                         close $fd
6519                                 or die_error(404, "Reading git-diff-tree failed");
6520                         @difftree
6521                                 or die_error(404, "Blob diff not found");
6522
6523                 } elsif (defined $hash &&
6524                          $hash =~ /[0-9a-fA-F]{40}/) {
6525                         # try to find filename from $hash
6526
6527                         # read filtered raw output
6528                         open $fd, "-|", git_cmd(), "diff-tree", '-r', @diff_opts,
6529                                 $hash_parent_base, $hash_base, "--"
6530                                 or die_error(500, "Open git-diff-tree failed");
6531                         @difftree =
6532                                 # ':100644 100644 03b21826... 3b93d5e7... M     ls-files.c'
6533                                 # $hash == to_id
6534                                 grep { /^:[0-7]{6} [0-7]{6} [0-9a-fA-F]{40} $hash/ }
6535                                 map { chomp; $_ } <$fd>;
6536                         close $fd
6537                                 or die_error(404, "Reading git-diff-tree failed");
6538                         @difftree
6539                                 or die_error(404, "Blob diff not found");
6540
6541                 } else {
6542                         die_error(400, "Missing one of the blob diff parameters");
6543                 }
6544
6545                 if (@difftree > 1) {
6546                         die_error(400, "Ambiguous blob diff specification");
6547                 }
6548
6549                 %diffinfo = parse_difftree_raw_line($difftree[0]);
6550                 $file_parent ||= $diffinfo{'from_file'} || $file_name;
6551                 $file_name   ||= $diffinfo{'to_file'};
6552
6553                 $hash_parent ||= $diffinfo{'from_id'};
6554                 $hash        ||= $diffinfo{'to_id'};
6555
6556                 # non-textual hash id's can be cached
6557                 if ($hash_base =~ m/^[0-9a-fA-F]{40}$/ &&
6558                     $hash_parent_base =~ m/^[0-9a-fA-F]{40}$/) {
6559                         $expires = '+1d';
6560                 }
6561
6562                 # open patch output
6563                 open $fd, "-|", git_cmd(), "diff-tree", '-r', @diff_opts,
6564                         '-p', ($format eq 'html' ? "--full-index" : ()),
6565                         $hash_parent_base, $hash_base,
6566                         "--", (defined $file_parent ? $file_parent : ()), $file_name
6567                         or die_error(500, "Open git-diff-tree failed");
6568         }
6569
6570         # old/legacy style URI -- not generated anymore since 1.4.3.
6571         if (!%diffinfo) {
6572                 die_error('404 Not Found', "Missing one of the blob diff parameters")
6573         }
6574
6575         # header
6576         if ($format eq 'html') {
6577                 my $formats_nav =
6578                         $cgi->a({-href => href(action=>"blobdiff_plain", -replay=>1)},
6579                                 "raw");
6580                 git_header_html(undef, $expires);
6581                 if (defined $hash_base && (my %co = parse_commit($hash_base))) {
6582                         git_print_page_nav('','', $hash_base,$co{'tree'},$hash_base, $formats_nav);
6583                         git_print_header_div('commit', esc_html($co{'title'}), $hash_base);
6584                 } else {
6585                         print "<div class=\"page_nav\"><br/>$formats_nav<br/></div>\n";
6586                         print "<div class=\"title\">".esc_html("$hash vs $hash_parent")."</div>\n";
6587                 }
6588                 if (defined $file_name) {
6589                         git_print_page_path($file_name, "blob", $hash_base);
6590                 } else {
6591                         print "<div class=\"page_path\"></div>\n";
6592                 }
6593
6594         } elsif ($format eq 'plain') {
6595                 print $cgi->header(
6596                         -type => 'text/plain',
6597                         -charset => 'utf-8',
6598                         -expires => $expires,
6599                         -content_disposition => 'inline; filename="' . "$file_name" . '.patch"');
6600
6601                 print "X-Git-Url: " . $cgi->self_url() . "\n\n";
6602
6603         } else {
6604                 die_error(400, "Unknown blobdiff format");
6605         }
6606
6607         # patch
6608         if ($format eq 'html') {
6609                 print "<div class=\"page_body\">\n";
6610
6611                 git_patchset_body($fd, [ \%diffinfo ], $hash_base, $hash_parent_base);
6612                 close $fd;
6613
6614                 print "</div>\n"; # class="page_body"
6615                 git_footer_html();
6616
6617         } else {
6618                 while (my $line = <$fd>) {
6619                         $line =~ s!a/($hash|$hash_parent)!'a/'.esc_path($diffinfo{'from_file'})!eg;
6620                         $line =~ s!b/($hash|$hash_parent)!'b/'.esc_path($diffinfo{'to_file'})!eg;
6621
6622                         print $line;
6623
6624                         last if $line =~ m!^\+\+\+!;
6625                 }
6626                 local $/ = undef;
6627                 print <$fd>;
6628                 close $fd;
6629         }
6630 }
6631
6632 sub git_blobdiff_plain {
6633         git_blobdiff('plain');
6634 }
6635
6636 sub git_commitdiff {
6637         my %params = @_;
6638         my $format = $params{-format} || 'html';
6639
6640         my ($patch_max) = gitweb_get_feature('patches');
6641         if ($format eq 'patch') {
6642                 die_error(403, "Patch view not allowed") unless $patch_max;
6643         }
6644
6645         $hash ||= $hash_base || "HEAD";
6646         my %co = parse_commit($hash)
6647             or die_error(404, "Unknown commit object");
6648
6649         # choose format for commitdiff for merge
6650         if (! defined $hash_parent && @{$co{'parents'}} > 1) {
6651                 $hash_parent = '--cc';
6652         }
6653         # we need to prepare $formats_nav before almost any parameter munging
6654         my $formats_nav;
6655         if ($format eq 'html') {
6656                 $formats_nav =
6657                         $cgi->a({-href => href(action=>"commitdiff_plain", -replay=>1)},
6658                                 "raw");
6659                 if ($patch_max && @{$co{'parents'}} <= 1) {
6660                         $formats_nav .= " | " .
6661                                 $cgi->a({-href => href(action=>"patch", -replay=>1)},
6662                                         "patch");
6663                 }
6664
6665                 if (defined $hash_parent &&
6666                     $hash_parent ne '-c' && $hash_parent ne '--cc') {
6667                         # commitdiff with two commits given
6668                         my $hash_parent_short = $hash_parent;
6669                         if ($hash_parent =~ m/^[0-9a-fA-F]{40}$/) {
6670                                 $hash_parent_short = substr($hash_parent, 0, 7);
6671                         }
6672                         $formats_nav .=
6673                                 ' (from';
6674                         for (my $i = 0; $i < @{$co{'parents'}}; $i++) {
6675                                 if ($co{'parents'}[$i] eq $hash_parent) {
6676                                         $formats_nav .= ' parent ' . ($i+1);
6677                                         last;
6678                                 }
6679                         }
6680                         $formats_nav .= ': ' .
6681                                 $cgi->a({-href => href(action=>"commitdiff",
6682                                                        hash=>$hash_parent)},
6683                                         esc_html($hash_parent_short)) .
6684                                 ')';
6685                 } elsif (!$co{'parent'}) {
6686                         # --root commitdiff
6687                         $formats_nav .= ' (initial)';
6688                 } elsif (scalar @{$co{'parents'}} == 1) {
6689                         # single parent commit
6690                         $formats_nav .=
6691                                 ' (parent: ' .
6692                                 $cgi->a({-href => href(action=>"commitdiff",
6693                                                        hash=>$co{'parent'})},
6694                                         esc_html(substr($co{'parent'}, 0, 7))) .
6695                                 ')';
6696                 } else {
6697                         # merge commit
6698                         if ($hash_parent eq '--cc') {
6699                                 $formats_nav .= ' | ' .
6700                                         $cgi->a({-href => href(action=>"commitdiff",
6701                                                                hash=>$hash, hash_parent=>'-c')},
6702                                                 'combined');
6703                         } else { # $hash_parent eq '-c'
6704                                 $formats_nav .= ' | ' .
6705                                         $cgi->a({-href => href(action=>"commitdiff",
6706                                                                hash=>$hash, hash_parent=>'--cc')},
6707                                                 'compact');
6708                         }
6709                         $formats_nav .=
6710                                 ' (merge: ' .
6711                                 join(' ', map {
6712                                         $cgi->a({-href => href(action=>"commitdiff",
6713                                                                hash=>$_)},
6714                                                 esc_html(substr($_, 0, 7)));
6715                                 } @{$co{'parents'}} ) .
6716                                 ')';
6717                 }
6718         }
6719
6720         my $hash_parent_param = $hash_parent;
6721         if (!defined $hash_parent_param) {
6722                 # --cc for multiple parents, --root for parentless
6723                 $hash_parent_param =
6724                         @{$co{'parents'}} > 1 ? '--cc' : $co{'parent'} || '--root';
6725         }
6726
6727         # read commitdiff
6728         my $fd;
6729         my @difftree;
6730         if ($format eq 'html') {
6731                 open $fd, "-|", git_cmd(), "diff-tree", '-r', @diff_opts,
6732                         "--no-commit-id", "--patch-with-raw", "--full-index",
6733                         $hash_parent_param, $hash, "--"
6734                         or die_error(500, "Open git-diff-tree failed");
6735
6736                 while (my $line = <$fd>) {
6737                         chomp $line;
6738                         # empty line ends raw part of diff-tree output
6739                         last unless $line;
6740                         push @difftree, scalar parse_difftree_raw_line($line);
6741                 }
6742
6743         } elsif ($format eq 'plain') {
6744                 open $fd, "-|", git_cmd(), "diff-tree", '-r', @diff_opts,
6745                         '-p', $hash_parent_param, $hash, "--"
6746                         or die_error(500, "Open git-diff-tree failed");
6747         } elsif ($format eq 'patch') {
6748                 # For commit ranges, we limit the output to the number of
6749                 # patches specified in the 'patches' feature.
6750                 # For single commits, we limit the output to a single patch,
6751                 # diverging from the git-format-patch default.
6752                 my @commit_spec = ();
6753                 if ($hash_parent) {
6754                         if ($patch_max > 0) {
6755                                 push @commit_spec, "-$patch_max";
6756                         }
6757                         push @commit_spec, '-n', "$hash_parent..$hash";
6758                 } else {
6759                         if ($params{-single}) {
6760                                 push @commit_spec, '-1';
6761                         } else {
6762                                 if ($patch_max > 0) {
6763                                         push @commit_spec, "-$patch_max";
6764                                 }
6765                                 push @commit_spec, "-n";
6766                         }
6767                         push @commit_spec, '--root', $hash;
6768                 }
6769                 open $fd, "-|", git_cmd(), "format-patch", @diff_opts,
6770                         '--encoding=utf8', '--stdout', @commit_spec
6771                         or die_error(500, "Open git-format-patch failed");
6772         } else {
6773                 die_error(400, "Unknown commitdiff format");
6774         }
6775
6776         # non-textual hash id's can be cached
6777         my $expires;
6778         if ($hash =~ m/^[0-9a-fA-F]{40}$/) {
6779                 $expires = "+1d";
6780         }
6781
6782         # write commit message
6783         if ($format eq 'html') {
6784                 my $refs = git_get_references();
6785                 my $ref = format_ref_marker($refs, $co{'id'});
6786
6787                 git_header_html(undef, $expires);
6788                 git_print_page_nav('commitdiff','', $hash,$co{'tree'},$hash, $formats_nav);
6789                 git_print_header_div('commit', esc_html($co{'title'}) . $ref, $hash);
6790                 print "<div class=\"title_text\">\n" .
6791                       "<table class=\"object_header\">\n";
6792                 git_print_authorship_rows(\%co);
6793                 print "</table>".
6794                       "</div>\n";
6795                 print "<div class=\"page_body\">\n";
6796                 if (@{$co{'comment'}} > 1) {
6797                         print "<div class=\"log\">\n";
6798                         git_print_log($co{'comment'}, -final_empty_line=> 1, -remove_title => 1);
6799                         print "</div>\n"; # class="log"
6800                 }
6801
6802         } elsif ($format eq 'plain') {
6803                 my $refs = git_get_references("tags");
6804                 my $tagname = git_get_rev_name_tags($hash);
6805                 my $filename = basename($project) . "-$hash.patch";
6806
6807                 print $cgi->header(
6808                         -type => 'text/plain',
6809                         -charset => 'utf-8',
6810                         -expires => $expires,
6811                         -content_disposition => 'inline; filename="' . "$filename" . '"');
6812                 my %ad = parse_date($co{'author_epoch'}, $co{'author_tz'});
6813                 print "From: " . to_utf8($co{'author'}) . "\n";
6814                 print "Date: $ad{'rfc2822'} ($ad{'tz_local'})\n";
6815                 print "Subject: " . to_utf8($co{'title'}) . "\n";
6816
6817                 print "X-Git-Tag: $tagname\n" if $tagname;
6818                 print "X-Git-Url: " . $cgi->self_url() . "\n\n";
6819
6820                 foreach my $line (@{$co{'comment'}}) {
6821                         print to_utf8($line) . "\n";
6822                 }
6823                 print "---\n\n";
6824         } elsif ($format eq 'patch') {
6825                 my $filename = basename($project) . "-$hash.patch";
6826
6827                 print $cgi->header(
6828                         -type => 'text/plain',
6829                         -charset => 'utf-8',
6830                         -expires => $expires,
6831                         -content_disposition => 'inline; filename="' . "$filename" . '"');
6832         }
6833
6834         # write patch
6835         if ($format eq 'html') {
6836                 my $use_parents = !defined $hash_parent ||
6837                         $hash_parent eq '-c' || $hash_parent eq '--cc';
6838                 git_difftree_body(\@difftree, $hash,
6839                                   $use_parents ? @{$co{'parents'}} : $hash_parent);
6840                 print "<br/>\n";
6841
6842                 git_patchset_body($fd, \@difftree, $hash,
6843                                   $use_parents ? @{$co{'parents'}} : $hash_parent);
6844                 close $fd;
6845                 print "</div>\n"; # class="page_body"
6846                 git_footer_html();
6847
6848         } elsif ($format eq 'plain') {
6849                 local $/ = undef;
6850                 print <$fd>;
6851                 close $fd
6852                         or print "Reading git-diff-tree failed\n";
6853         } elsif ($format eq 'patch') {
6854                 local $/ = undef;
6855                 print <$fd>;
6856                 close $fd
6857                         or print "Reading git-format-patch failed\n";
6858         }
6859 }
6860
6861 sub git_commitdiff_plain {
6862         git_commitdiff(-format => 'plain');
6863 }
6864
6865 # format-patch-style patches
6866 sub git_patch {
6867         git_commitdiff(-format => 'patch', -single => 1);
6868 }
6869
6870 sub git_patches {
6871         git_commitdiff(-format => 'patch');
6872 }
6873
6874 sub git_history {
6875         git_log_generic('history', \&git_history_body,
6876                         $hash_base, $hash_parent_base,
6877                         $file_name, $hash);
6878 }
6879
6880 sub git_search {
6881         gitweb_check_feature('search') or die_error(403, "Search is disabled");
6882         if (!defined $searchtext) {
6883                 die_error(400, "Text field is empty");
6884         }
6885         if (!defined $hash) {
6886                 $hash = git_get_head_hash($project);
6887         }
6888         my %co = parse_commit($hash);
6889         if (!%co) {
6890                 die_error(404, "Unknown commit object");
6891         }
6892         if (!defined $page) {
6893                 $page = 0;
6894         }
6895
6896         $searchtype ||= 'commit';
6897         if ($searchtype eq 'pickaxe') {
6898                 # pickaxe may take all resources of your box and run for several minutes
6899                 # with every query - so decide by yourself how public you make this feature
6900                 gitweb_check_feature('pickaxe')
6901                     or die_error(403, "Pickaxe is disabled");
6902         }
6903         if ($searchtype eq 'grep') {
6904                 gitweb_check_feature('grep')
6905                     or die_error(403, "Grep is disabled");
6906         }
6907
6908         git_header_html();
6909
6910         if ($searchtype eq 'commit' or $searchtype eq 'author' or $searchtype eq 'committer') {
6911                 my $greptype;
6912                 if ($searchtype eq 'commit') {
6913                         $greptype = "--grep=";
6914                 } elsif ($searchtype eq 'author') {
6915                         $greptype = "--author=";
6916                 } elsif ($searchtype eq 'committer') {
6917                         $greptype = "--committer=";
6918                 }
6919                 $greptype .= $searchtext;
6920                 my @commitlist = parse_commits($hash, 101, (100 * $page), undef,
6921                                                $greptype, '--regexp-ignore-case',
6922                                                $search_use_regexp ? '--extended-regexp' : '--fixed-strings');
6923
6924                 my $paging_nav = '';
6925                 if ($page > 0) {
6926                         $paging_nav .=
6927                                 $cgi->a({-href => href(action=>"search", hash=>$hash,
6928                                                        searchtext=>$searchtext,
6929                                                        searchtype=>$searchtype)},
6930                                         "first");
6931                         $paging_nav .= " &sdot; " .
6932                                 $cgi->a({-href => href(-replay=>1, page=>$page-1),
6933                                          -accesskey => "p", -title => "Alt-p"}, "prev");
6934                 } else {
6935                         $paging_nav .= "first";
6936                         $paging_nav .= " &sdot; prev";
6937                 }
6938                 my $next_link = '';
6939                 if ($#commitlist >= 100) {
6940                         $next_link =
6941                                 $cgi->a({-href => href(-replay=>1, page=>$page+1),
6942                                          -accesskey => "n", -title => "Alt-n"}, "next");
6943                         $paging_nav .= " &sdot; $next_link";
6944                 } else {
6945                         $paging_nav .= " &sdot; next";
6946                 }
6947
6948                 git_print_page_nav('','', $hash,$co{'tree'},$hash, $paging_nav);
6949                 git_print_header_div('commit', esc_html($co{'title'}), $hash);
6950                 if ($page == 0 && !@commitlist) {
6951                         print "<p>No match.</p>\n";
6952                 } else {
6953                         git_search_grep_body(\@commitlist, 0, 99, $next_link);
6954                 }
6955         }
6956
6957         if ($searchtype eq 'pickaxe') {
6958                 git_print_page_nav('','', $hash,$co{'tree'},$hash);
6959                 git_print_header_div('commit', esc_html($co{'title'}), $hash);
6960
6961                 print "<table class=\"pickaxe search\">\n";
6962                 my $alternate = 1;
6963                 local $/ = "\n";
6964                 open my $fd, '-|', git_cmd(), '--no-pager', 'log', @diff_opts,
6965                         '--pretty=format:%H', '--no-abbrev', '--raw', "-S$searchtext",
6966                         ($search_use_regexp ? '--pickaxe-regex' : ());
6967                 undef %co;
6968                 my @files;
6969                 while (my $line = <$fd>) {
6970                         chomp $line;
6971                         next unless $line;
6972
6973                         my %set = parse_difftree_raw_line($line);
6974                         if (defined $set{'commit'}) {
6975                                 # finish previous commit
6976                                 if (%co) {
6977                                         print "</td>\n" .
6978                                               "<td class=\"link\">" .
6979                                               $cgi->a({-href => href(action=>"commit", hash=>$co{'id'})}, "commit") .
6980                                               " | " .
6981                                               $cgi->a({-href => href(action=>"tree", hash=>$co{'tree'}, hash_base=>$co{'id'})}, "tree");
6982                                         print "</td>\n" .
6983                                               "</tr>\n";
6984                                 }
6985
6986                                 if ($alternate) {
6987                                         print "<tr class=\"dark\">\n";
6988                                 } else {
6989                                         print "<tr class=\"light\">\n";
6990                                 }
6991                                 $alternate ^= 1;
6992                                 %co = parse_commit($set{'commit'});
6993                                 my $author = chop_and_escape_str($co{'author_name'}, 15, 5);
6994                                 print "<td title=\"$co{'age_string_age'}\"><i>$co{'age_string_date'}</i></td>\n" .
6995                                       "<td><i>$author</i></td>\n" .
6996                                       "<td>" .
6997                                       $cgi->a({-href => href(action=>"commit", hash=>$co{'id'}),
6998                                               -class => "list subject"},
6999                                               chop_and_escape_str($co{'title'}, 50) . "<br/>");
7000                         } elsif (defined $set{'to_id'}) {
7001                                 next if ($set{'to_id'} =~ m/^0{40}$/);
7002
7003                                 print $cgi->a({-href => href(action=>"blob", hash_base=>$co{'id'},
7004                                                              hash=>$set{'to_id'}, file_name=>$set{'to_file'}),
7005                                               -class => "list"},
7006                                               "<span class=\"match\">" . esc_path($set{'file'}) . "</span>") .
7007                                       "<br/>\n";
7008                         }
7009                 }
7010                 close $fd;
7011
7012                 # finish last commit (warning: repetition!)
7013                 if (%co) {
7014                         print "</td>\n" .
7015                               "<td class=\"link\">" .
7016                               $cgi->a({-href => href(action=>"commit", hash=>$co{'id'})}, "commit") .
7017                               " | " .
7018                               $cgi->a({-href => href(action=>"tree", hash=>$co{'tree'}, hash_base=>$co{'id'})}, "tree");
7019                         print "</td>\n" .
7020                               "</tr>\n";
7021                 }
7022
7023                 print "</table>\n";
7024         }
7025
7026         if ($searchtype eq 'grep') {
7027                 git_print_page_nav('','', $hash,$co{'tree'},$hash);
7028                 git_print_header_div('commit', esc_html($co{'title'}), $hash);
7029
7030                 print "<table class=\"grep_search\">\n";
7031                 my $alternate = 1;
7032                 my $matches = 0;
7033                 local $/ = "\n";
7034                 open my $fd, "-|", git_cmd(), 'grep', '-n',
7035                         $search_use_regexp ? ('-E', '-i') : '-F',
7036                         $searchtext, $co{'tree'};
7037                 my $lastfile = '';
7038                 while (my $line = <$fd>) {
7039                         chomp $line;
7040                         my ($file, $lno, $ltext, $binary);
7041                         last if ($matches++ > 1000);
7042                         if ($line =~ /^Binary file (.+) matches$/) {
7043                                 $file = $1;
7044                                 $binary = 1;
7045                         } else {
7046                                 (undef, $file, $lno, $ltext) = split(/:/, $line, 4);
7047                         }
7048                         if ($file ne $lastfile) {
7049                                 $lastfile and print "</td></tr>\n";
7050                                 if ($alternate++) {
7051                                         print "<tr class=\"dark\">\n";
7052                                 } else {
7053                                         print "<tr class=\"light\">\n";
7054                                 }
7055                                 print "<td class=\"list\">".
7056                                         $cgi->a({-href => href(action=>"blob", hash=>$co{'hash'},
7057                                                                file_name=>"$file"),
7058                                                 -class => "list"}, esc_path($file));
7059                                 print "</td><td>\n";
7060                                 $lastfile = $file;
7061                         }
7062                         if ($binary) {
7063                                 print "<div class=\"binary\">Binary file</div>\n";
7064                         } else {
7065                                 $ltext = untabify($ltext);
7066                                 if ($ltext =~ m/^(.*)($search_regexp)(.*)$/i) {
7067                                         $ltext = esc_html($1, -nbsp=>1);
7068                                         $ltext .= '<span class="match">';
7069                                         $ltext .= esc_html($2, -nbsp=>1);
7070                                         $ltext .= '</span>';
7071                                         $ltext .= esc_html($3, -nbsp=>1);
7072                                 } else {
7073                                         $ltext = esc_html($ltext, -nbsp=>1);
7074                                 }
7075                                 print "<div class=\"pre\">" .
7076                                         $cgi->a({-href => href(action=>"blob", hash=>$co{'hash'},
7077                                                                file_name=>"$file").'#l'.$lno,
7078                                                 -class => "linenr"}, sprintf('%4i', $lno))
7079                                         . ' ' .  $ltext . "</div>\n";
7080                         }
7081                 }
7082                 if ($lastfile) {
7083                         print "</td></tr>\n";
7084                         if ($matches > 1000) {
7085                                 print "<div class=\"diff nodifferences\">Too many matches, listing trimmed</div>\n";
7086                         }
7087                 } else {
7088                         print "<div class=\"diff nodifferences\">No matches found</div>\n";
7089                 }
7090                 close $fd;
7091
7092                 print "</table>\n";
7093         }
7094         git_footer_html();
7095 }
7096
7097 sub git_search_help {
7098         git_header_html();
7099         git_print_page_nav('','', $hash,$hash,$hash);
7100         print <<EOT;
7101 <p><strong>Pattern</strong> is by default a normal string that is matched precisely (but without
7102 regard to case, except in the case of pickaxe). However, when you check the <em>re</em> checkbox,
7103 the pattern entered is recognized as the POSIX extended
7104 <a href="http://en.wikipedia.org/wiki/Regular_expression">regular expression</a> (also case
7105 insensitive).</p>
7106 <dl>
7107 <dt><b>commit</b></dt>
7108 <dd>The commit messages and authorship information will be scanned for the given pattern.</dd>
7109 EOT
7110         my $have_grep = gitweb_check_feature('grep');
7111         if ($have_grep) {
7112                 print <<EOT;
7113 <dt><b>grep</b></dt>
7114 <dd>All files in the currently selected tree (HEAD unless you are explicitly browsing
7115     a different one) are searched for the given pattern. On large trees, this search can take
7116 a while and put some strain on the server, so please use it with some consideration. Note that
7117 due to git-grep peculiarity, currently if regexp mode is turned off, the matches are
7118 case-sensitive.</dd>
7119 EOT
7120         }
7121         print <<EOT;
7122 <dt><b>author</b></dt>
7123 <dd>Name and e-mail of the change author and date of birth of the patch will be scanned for the given pattern.</dd>
7124 <dt><b>committer</b></dt>
7125 <dd>Name and e-mail of the committer and date of commit will be scanned for the given pattern.</dd>
7126 EOT
7127         my $have_pickaxe = gitweb_check_feature('pickaxe');
7128         if ($have_pickaxe) {
7129                 print <<EOT;
7130 <dt><b>pickaxe</b></dt>
7131 <dd>All commits that caused the string to appear or disappear from any file (changes that
7132 added, removed or "modified" the string) will be listed. This search can take a while and
7133 takes a lot of strain on the server, so please use it wisely. Note that since you may be
7134 interested even in changes just changing the case as well, this search is case sensitive.</dd>
7135 EOT
7136         }
7137         print "</dl>\n";
7138         git_footer_html();
7139 }
7140
7141 sub git_shortlog {
7142         git_log_generic('shortlog', \&git_shortlog_body,
7143                         $hash, $hash_parent);
7144 }
7145
7146 ## ......................................................................
7147 ## feeds (RSS, Atom; OPML)
7148
7149 sub git_feed {
7150         my $format = shift || 'atom';
7151         my $have_blame = gitweb_check_feature('blame');
7152
7153         # Atom: http://www.atomenabled.org/developers/syndication/
7154         # RSS:  http://www.notestips.com/80256B3A007F2692/1/NAMO5P9UPQ
7155         if ($format ne 'rss' && $format ne 'atom') {
7156                 die_error(400, "Unknown web feed format");
7157         }
7158
7159         # log/feed of current (HEAD) branch, log of given branch, history of file/directory
7160         my $head = $hash || 'HEAD';
7161         my @commitlist = parse_commits($head, 150, 0, $file_name);
7162
7163         my %latest_commit;
7164         my %latest_date;
7165         my $content_type = "application/$format+xml";
7166         if (defined $cgi->http('HTTP_ACCEPT') &&
7167                  $cgi->Accept('text/xml') > $cgi->Accept($content_type)) {
7168                 # browser (feed reader) prefers text/xml
7169                 $content_type = 'text/xml';
7170         }
7171         if (defined($commitlist[0])) {
7172                 %latest_commit = %{$commitlist[0]};
7173                 my $latest_epoch = $latest_commit{'committer_epoch'};
7174                 %latest_date   = parse_date($latest_epoch, $latest_commit{'comitter_tz'});
7175                 my $if_modified = $cgi->http('IF_MODIFIED_SINCE');
7176                 if (defined $if_modified) {
7177                         my $since;
7178                         if (eval { require HTTP::Date; 1; }) {
7179                                 $since = HTTP::Date::str2time($if_modified);
7180                         } elsif (eval { require Time::ParseDate; 1; }) {
7181                                 $since = Time::ParseDate::parsedate($if_modified, GMT => 1);
7182                         }
7183                         if (defined $since && $latest_epoch <= $since) {
7184                                 print $cgi->header(
7185                                         -type => $content_type,
7186                                         -charset => 'utf-8',
7187                                         -last_modified => $latest_date{'rfc2822'},
7188                                         -status => '304 Not Modified');
7189                                 return;
7190                         }
7191                 }
7192                 print $cgi->header(
7193                         -type => $content_type,
7194                         -charset => 'utf-8',
7195                         -last_modified => $latest_date{'rfc2822'});
7196         } else {
7197                 print $cgi->header(
7198                         -type => $content_type,
7199                         -charset => 'utf-8');
7200         }
7201
7202         # Optimization: skip generating the body if client asks only
7203         # for Last-Modified date.
7204         return if ($cgi->request_method() eq 'HEAD');
7205
7206         # header variables
7207         my $title = "$site_name - $project/$action";
7208         my $feed_type = 'log';
7209         if (defined $hash) {
7210                 $title .= " - '$hash'";
7211                 $feed_type = 'branch log';
7212                 if (defined $file_name) {
7213                         $title .= " :: $file_name";
7214                         $feed_type = 'history';
7215                 }
7216         } elsif (defined $file_name) {
7217                 $title .= " - $file_name";
7218                 $feed_type = 'history';
7219         }
7220         $title .= " $feed_type";
7221         my $descr = git_get_project_description($project);
7222         if (defined $descr) {
7223                 $descr = esc_html($descr);
7224         } else {
7225                 $descr = "$project " .
7226                          ($format eq 'rss' ? 'RSS' : 'Atom') .
7227                          " feed";
7228         }
7229         my $owner = git_get_project_owner($project);
7230         $owner = esc_html($owner);
7231
7232         #header
7233         my $alt_url;
7234         if (defined $file_name) {
7235                 $alt_url = href(-full=>1, action=>"history", hash=>$hash, file_name=>$file_name);
7236         } elsif (defined $hash) {
7237                 $alt_url = href(-full=>1, action=>"log", hash=>$hash);
7238         } else {
7239                 $alt_url = href(-full=>1, action=>"summary");
7240         }
7241         print qq!<?xml version="1.0" encoding="utf-8"?>\n!;
7242         if ($format eq 'rss') {
7243                 print <<XML;
7244 <rss version="2.0" xmlns:content="http://purl.org/rss/1.0/modules/content/">
7245 <channel>
7246 XML
7247                 print "<title>$title</title>\n" .
7248                       "<link>$alt_url</link>\n" .
7249                       "<description>$descr</description>\n" .
7250                       "<language>en</language>\n" .
7251                       # project owner is responsible for 'editorial' content
7252                       "<managingEditor>$owner</managingEditor>\n";
7253                 if (defined $logo || defined $favicon) {
7254                         # prefer the logo to the favicon, since RSS
7255                         # doesn't allow both
7256                         my $img = esc_url($logo || $favicon);
7257                         print "<image>\n" .
7258                               "<url>$img</url>\n" .
7259                               "<title>$title</title>\n" .
7260                               "<link>$alt_url</link>\n" .
7261                               "</image>\n";
7262                 }
7263                 if (%latest_date) {
7264                         print "<pubDate>$latest_date{'rfc2822'}</pubDate>\n";
7265                         print "<lastBuildDate>$latest_date{'rfc2822'}</lastBuildDate>\n";
7266                 }
7267                 print "<generator>gitweb v.$version/$git_version</generator>\n";
7268         } elsif ($format eq 'atom') {
7269                 print <<XML;
7270 <feed xmlns="http://www.w3.org/2005/Atom">
7271 XML
7272                 print "<title>$title</title>\n" .
7273                       "<subtitle>$descr</subtitle>\n" .
7274                       '<link rel="alternate" type="text/html" href="' .
7275                       $alt_url . '" />' . "\n" .
7276                       '<link rel="self" type="' . $content_type . '" href="' .
7277                       $cgi->self_url() . '" />' . "\n" .
7278                       "<id>" . href(-full=>1) . "</id>\n" .
7279                       # use project owner for feed author
7280                       "<author><name>$owner</name></author>\n";
7281                 if (defined $favicon) {
7282                         print "<icon>" . esc_url($favicon) . "</icon>\n";
7283                 }
7284                 if (defined $logo) {
7285                         # not twice as wide as tall: 72 x 27 pixels
7286                         print "<logo>" . esc_url($logo) . "</logo>\n";
7287                 }
7288                 if (! %latest_date) {
7289                         # dummy date to keep the feed valid until commits trickle in:
7290                         print "<updated>1970-01-01T00:00:00Z</updated>\n";
7291                 } else {
7292                         print "<updated>$latest_date{'iso-8601'}</updated>\n";
7293                 }
7294                 print "<generator version='$version/$git_version'>gitweb</generator>\n";
7295         }
7296
7297         # contents
7298         for (my $i = 0; $i <= $#commitlist; $i++) {
7299                 my %co = %{$commitlist[$i]};
7300                 my $commit = $co{'id'};
7301                 # we read 150, we always show 30 and the ones more recent than 48 hours
7302                 if (($i >= 20) && ((time - $co{'author_epoch'}) > 48*60*60)) {
7303                         last;
7304                 }
7305                 my %cd = parse_date($co{'author_epoch'}, $co{'author_tz'});
7306
7307                 # get list of changed files
7308                 open my $fd, "-|", git_cmd(), "diff-tree", '-r', @diff_opts,
7309                         $co{'parent'} || "--root",
7310                         $co{'id'}, "--", (defined $file_name ? $file_name : ())
7311                         or next;
7312                 my @difftree = map { chomp; $_ } <$fd>;
7313                 close $fd
7314                         or next;
7315
7316                 # print element (entry, item)
7317                 my $co_url = href(-full=>1, action=>"commitdiff", hash=>$commit);
7318                 if ($format eq 'rss') {
7319                         print "<item>\n" .
7320                               "<title>" . esc_html($co{'title'}) . "</title>\n" .
7321                               "<author>" . esc_html($co{'author'}) . "</author>\n" .
7322                               "<pubDate>$cd{'rfc2822'}</pubDate>\n" .
7323                               "<guid isPermaLink=\"true\">$co_url</guid>\n" .
7324                               "<link>$co_url</link>\n" .
7325                               "<description>" . esc_html($co{'title'}) . "</description>\n" .
7326                               "<content:encoded>" .
7327                               "<![CDATA[\n";
7328                 } elsif ($format eq 'atom') {
7329                         print "<entry>\n" .
7330                               "<title type=\"html\">" . esc_html($co{'title'}) . "</title>\n" .
7331                               "<updated>$cd{'iso-8601'}</updated>\n" .
7332                               "<author>\n" .
7333                               "  <name>" . esc_html($co{'author_name'}) . "</name>\n";
7334                         if ($co{'author_email'}) {
7335                                 print "  <email>" . esc_html($co{'author_email'}) . "</email>\n";
7336                         }
7337                         print "</author>\n" .
7338                               # use committer for contributor
7339                               "<contributor>\n" .
7340                               "  <name>" . esc_html($co{'committer_name'}) . "</name>\n";
7341                         if ($co{'committer_email'}) {
7342                                 print "  <email>" . esc_html($co{'committer_email'}) . "</email>\n";
7343                         }
7344                         print "</contributor>\n" .
7345                               "<published>$cd{'iso-8601'}</published>\n" .
7346                               "<link rel=\"alternate\" type=\"text/html\" href=\"$co_url\" />\n" .
7347                               "<id>$co_url</id>\n" .
7348                               "<content type=\"xhtml\" xml:base=\"" . esc_url($my_url) . "\">\n" .
7349                               "<div xmlns=\"http://www.w3.org/1999/xhtml\">\n";
7350                 }
7351                 my $comment = $co{'comment'};
7352                 print "<pre>\n";
7353                 foreach my $line (@$comment) {
7354                         $line = esc_html($line);
7355                         print "$line\n";
7356                 }
7357                 print "</pre><ul>\n";
7358                 foreach my $difftree_line (@difftree) {
7359                         my %difftree = parse_difftree_raw_line($difftree_line);
7360                         next if !$difftree{'from_id'};
7361
7362                         my $file = $difftree{'file'} || $difftree{'to_file'};
7363
7364                         print "<li>" .
7365                               "[" .
7366                               $cgi->a({-href => href(-full=>1, action=>"blobdiff",
7367                                                      hash=>$difftree{'to_id'}, hash_parent=>$difftree{'from_id'},
7368                                                      hash_base=>$co{'id'}, hash_parent_base=>$co{'parent'},
7369                                                      file_name=>$file, file_parent=>$difftree{'from_file'}),
7370                                       -title => "diff"}, 'D');
7371                         if ($have_blame) {
7372                                 print $cgi->a({-href => href(-full=>1, action=>"blame",
7373                                                              file_name=>$file, hash_base=>$commit),
7374                                               -title => "blame"}, 'B');
7375                         }
7376                         # if this is not a feed of a file history
7377                         if (!defined $file_name || $file_name ne $file) {
7378                                 print $cgi->a({-href => href(-full=>1, action=>"history",
7379                                                              file_name=>$file, hash=>$commit),
7380                                               -title => "history"}, 'H');
7381                         }
7382                         $file = esc_path($file);
7383                         print "] ".
7384                               "$file</li>\n";
7385                 }
7386                 if ($format eq 'rss') {
7387                         print "</ul>]]>\n" .
7388                               "</content:encoded>\n" .
7389                               "</item>\n";
7390                 } elsif ($format eq 'atom') {
7391                         print "</ul>\n</div>\n" .
7392                               "</content>\n" .
7393                               "</entry>\n";
7394                 }
7395         }
7396
7397         # end of feed
7398         if ($format eq 'rss') {
7399                 print "</channel>\n</rss>\n";
7400         } elsif ($format eq 'atom') {
7401                 print "</feed>\n";
7402         }
7403 }
7404
7405 sub git_rss {
7406         git_feed('rss');
7407 }
7408
7409 sub git_atom {
7410         git_feed('atom');
7411 }
7412
7413 sub git_opml {
7414         my @list = git_get_projects_list();
7415         if (!@list) {
7416                 die_error(404, "No projects found");
7417         }
7418
7419         print $cgi->header(
7420                 -type => 'text/xml',
7421                 -charset => 'utf-8',
7422                 -content_disposition => 'inline; filename="opml.xml"');
7423
7424         print <<XML;
7425 <?xml version="1.0" encoding="utf-8"?>
7426 <opml version="1.0">
7427 <head>
7428   <title>$site_name OPML Export</title>
7429 </head>
7430 <body>
7431 <outline text="git RSS feeds">
7432 XML
7433
7434         foreach my $pr (@list) {
7435                 my %proj = %$pr;
7436                 my $head = git_get_head_hash($proj{'path'});
7437                 if (!defined $head) {
7438                         next;
7439                 }
7440                 $git_dir = "$projectroot/$proj{'path'}";
7441                 my %co = parse_commit($head);
7442                 if (!%co) {
7443                         next;
7444                 }
7445
7446                 my $path = esc_html(chop_str($proj{'path'}, 25, 5));
7447                 my $rss  = href('project' => $proj{'path'}, 'action' => 'rss', -full => 1);
7448                 my $html = href('project' => $proj{'path'}, 'action' => 'summary', -full => 1);
7449                 print "<outline type=\"rss\" text=\"$path\" title=\"$path\" xmlUrl=\"$rss\" htmlUrl=\"$html\"/>\n";
7450         }
7451         print <<XML;
7452 </outline>
7453 </body>
7454 </opml>
7455 XML
7456 }