Lady’s Gitweb - Gitweb/blob - 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
 100 # URI of GIT logo (72x27 size)
 101 our $logo = "++GITWEB_LOGO++";
 102 # URI of GIT favicon, assumed to be image/png type
 103 our $favicon = "++GITWEB_FAVICON++";
 104 # URI of gitweb.js (JavaScript code for gitweb)
 105 our $javascript = "++GITWEB_JS++";
 106
 107 # URI and label (title) of GIT logo link
 108 #our $logo_url = "http://www.kernel.org/pub/software/scm/git/docs/";
 109 #our $logo_label = "git documentation";
 110 our $logo_url = "http://git-scm.com/";
 111 our $logo_label = "git homepage";
 112
 113 # source of projects list
 114 our $projects_list = "++GITWEB_LIST++";
 115
 116 # the width (in characters) of the projects list "Description" column
 117 our $projects_list_description_width = 25;
 118
 119 # default order of projects list
 120 # valid values are none, project, descr, owner, and age
 121 our $default_projects_order = "project";
 122
 123 # show repository only if this file exists
 124 # (only effective if this variable evaluates to true)
 125 our $export_ok = "++GITWEB_EXPORT_OK++";
 126
 127 # show repository only if this subroutine returns true
 128 # when given the path to the project, for example:
 129 #    sub { return -e "$_[0]/git-daemon-export-ok"; }
 130 our $export_auth_hook = undef;
 131
 132 # only allow viewing of repositories also shown on the overview page
 133 our $strict_export = "++GITWEB_STRICT_EXPORT++";
 134
 135 # list of git base URLs used for URL to where fetch project from,
 136 # i.e. full URL is "$git_base_url/$project"
 137 our @git_base_url_list = grep { $_ ne '' } ("++GITWEB_BASE_URL++");
 138
 139 # default blob_plain mimetype and default charset for text/plain blob
 140 our $default_blob_plain_mimetype = 'text/plain';
 141 our $default_text_plain_charset  = undef;
 142
 143 # file to use for guessing MIME types before trying /etc/mime.types
 144 # (relative to the current git repository)
 145 our $mimetypes_file = undef;
 146
 147 # assume this charset if line contains non-UTF-8 characters;
 148 # it should be valid encoding (see Encoding::Supported(3pm) for list),
 149 # for which encoding all byte sequences are valid, for example
 150 # 'iso-8859-1' aka 'latin1' (it is decoded without checking, so it
 151 # could be even 'utf-8' for the old behavior)
 152 our $fallback_encoding = 'latin1';
 153
 154 # rename detection options for git-diff and git-diff-tree
 155 # - default is '-M', with the cost proportional to
 156 #   (number of removed files) * (number of new files).
 157 # - more costly is '-C' (which implies '-M'), with the cost proportional to
 158 #   (number of changed files + number of removed files) * (number of new files)
 159 # - even more costly is '-C', '--find-copies-harder' with cost
 160 #   (number of files in the original tree) * (number of new files)
 161 # - one might want to include '-B' option, e.g. '-B', '-M'
 162 our @diff_opts = ('-M'); # taken from git_commit
 163
 164 # Disables features that would allow repository owners to inject script into
 165 # the gitweb domain.
 166 our $prevent_xss = 0;
 167
 168 # Path to the highlight executable to use (must be the one from
 169 # http://www.andre-simon.de due to assumptions about parameters and output).
 170 # Useful if highlight is not installed on your webserver's PATH.
 171 # [Default: highlight]
 172 our $highlight_bin = "++HIGHLIGHT_BIN++";
 173
 174 # information about snapshot formats that gitweb is capable of serving
 175 our %known_snapshot_formats = (
 176         # name => {
 177         #       'display' => display name,
 178         #       'type' => mime type,
 179         #       'suffix' => filename suffix,
 180         #       'format' => --format for git-archive,
 181         #       'compressor' => [compressor command and arguments]
 182         #                       (array reference, optional)
 183         #       'disabled' => boolean (optional)}
 184         #
 185         'tgz' => {
 186                 'display' => 'tar.gz',
 187                 'type' => 'application/x-gzip',
 188                 'suffix' => '.tar.gz',
 189                 'format' => 'tar',
 190                 'compressor' => ['gzip']},
 191
 192         'tbz2' => {
 193                 'display' => 'tar.bz2',
 194                 'type' => 'application/x-bzip2',
 195                 'suffix' => '.tar.bz2',
 196                 'format' => 'tar',
 197                 'compressor' => ['bzip2']},
 198
 199         'txz' => {
 200                 'display' => 'tar.xz',
 201                 'type' => 'application/x-xz',
 202                 'suffix' => '.tar.xz',
 203                 'format' => 'tar',
 204                 'compressor' => ['xz'],
 205                 'disabled' => 1},
 206
 207         'zip' => {
 208                 'display' => 'zip',
 209                 'type' => 'application/x-zip',
 210                 'suffix' => '.zip',
 211                 'format' => 'zip'},
 212 );
 213
 214 # Aliases so we understand old gitweb.snapshot values in repository
 215 # configuration.
 216 our %known_snapshot_format_aliases = (
 217         'gzip'  => 'tgz',
 218         'bzip2' => 'tbz2',
 219         'xz'    => 'txz',
 220
 221         # backward compatibility: legacy gitweb config support
 222         'x-gzip' => undef, 'gz' => undef,
 223         'x-bzip2' => undef, 'bz2' => undef,
 224         'x-zip' => undef, '' => undef,
 225 );
 226
 227 # Pixel sizes for icons and avatars. If the default font sizes or lineheights
 228 # are changed, it may be appropriate to change these values too via
 229 # $GITWEB_CONFIG.
 230 our %avatar_size = (
 231         'default' => 16,
 232         'double'  => 32
 233 );
 234
 235 # Used to set the maximum load that we will still respond to gitweb queries.
 236 # If server load exceed this value then return "503 server busy" error.
 237 # If gitweb cannot determined server load, it is taken to be 0.
 238 # Leave it undefined (or set to 'undef') to turn off load checking.
 239 our $maxload = 300;
 240
 241 # configuration for 'highlight' (http://www.andre-simon.de/)
 242 # match by basename
 243 our %highlight_basename = (
 244         #'Program' => 'py',
 245         #'Library' => 'py',
 246         'SConstruct' => 'py', # SCons equivalent of Makefile
 247         'Makefile' => 'make',
 248 );
 249 # match by extension
 250 our %highlight_ext = (
 251         # main extensions, defining name of syntax;
 252         # see files in /usr/share/highlight/langDefs/ directory
 253         map { $_ => $_ }
 254                 qw(py c cpp rb java css php sh pl js tex bib xml awk bat ini spec tcl),
 255         # alternate extensions, see /etc/highlight/filetypes.conf
 256         'h' => 'c',
 257         map { $_ => 'cpp' } qw(cxx c++ cc),
 258         map { $_ => 'php' } qw(php3 php4),
 259         map { $_ => 'pl'  } qw(perl pm), # perhaps also 'cgi'
 260         'mak' => 'make',
 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 our ($GITWEB_CONFIG, $GITWEB_CONFIG_SYSTEM);
 616 sub evaluate_gitweb_config {
 617         our $GITWEB_CONFIG = $ENV{'GITWEB_CONFIG'} || "++GITWEB_CONFIG++";
 618         our $GITWEB_CONFIG_SYSTEM = $ENV{'GITWEB_CONFIG_SYSTEM'} || "++GITWEB_CONFIG_SYSTEM++";
 619         # die if there are errors parsing config file
 620         if (-e $GITWEB_CONFIG) {
 621                 do $GITWEB_CONFIG;
 622                 die $@ if $@;
 623         } elsif (-e $GITWEB_CONFIG_SYSTEM) {
 624                 do $GITWEB_CONFIG_SYSTEM;
 625                 die $@ if $@;
 626         }
 627 }
 628
 629 # Get loadavg of system, to compare against $maxload.
 630 # Currently it requires '/proc/loadavg' present to get loadavg;
 631 # if it is not present it returns 0, which means no load checking.
 632 sub get_loadavg {
 633         if( -e '/proc/loadavg' ){
 634                 open my $fd, '<', '/proc/loadavg'
 635                         or return 0;
 636                 my @load = split(/\s+/, scalar <$fd>);
 637                 close $fd;
 638
 639                 # The first three columns measure CPU and IO utilization of the last one,
 640                 # five, and 10 minute periods.  The fourth column shows the number of
 641                 # currently running processes and the total number of processes in the m/n
 642                 # format.  The last column displays the last process ID used.
 643                 return $load[0] || 0;
 644         }
 645         # additional checks for load average should go here for things that don't export
 646         # /proc/loadavg
 647
 648         return 0;
 649 }
 650
 651 # version of the core git binary
 652 our $git_version;
 653 sub evaluate_git_version {
 654         our $git_version = qx("$GIT" --version) =~ m/git version (.*)$/ ? $1 : "unknown";
 655         $number_of_git_cmds++;
 656 }
 657
 658 sub check_loadavg {
 659         if (defined $maxload && get_loadavg() > $maxload) {
 660                 die_error(503, "The load average on the server is too high");
 661         }
 662 }
 663
 664 # ======================================================================
 665 # input validation and dispatch
 666
 667 # input parameters can be collected from a variety of sources (presently, CGI
 668 # and PATH_INFO), so we define an %input_params hash that collects them all
 669 # together during validation: this allows subsequent uses (e.g. href()) to be
 670 # agnostic of the parameter origin
 671
 672 our %input_params = ();
 673
 674 # input parameters are stored with the long parameter name as key. This will
 675 # also be used in the href subroutine to convert parameters to their CGI
 676 # equivalent, and since the href() usage is the most frequent one, we store
 677 # the name -> CGI key mapping here, instead of the reverse.
 678 #
 679 # XXX: Warning: If you touch this, check the search form for updating,
 680 # too.
 681
 682 our @cgi_param_mapping = (
 683         project => "p",
 684         action => "a",
 685         file_name => "f",
 686         file_parent => "fp",
 687         hash => "h",
 688         hash_parent => "hp",
 689         hash_base => "hb",
 690         hash_parent_base => "hpb",
 691         page => "pg",
 692         order => "o",
 693         searchtext => "s",
 694         searchtype => "st",
 695         snapshot_format => "sf",
 696         extra_options => "opt",
 697         search_use_regexp => "sr",
 698         # this must be last entry (for manipulation from JavaScript)
 699         javascript => "js"
 700 );
 701 our %cgi_param_mapping = @cgi_param_mapping;
 702
 703 # we will also need to know the possible actions, for validation
 704 our %actions = (
 705         "blame" => \&git_blame,
 706         "blame_incremental" => \&git_blame_incremental,
 707         "blame_data" => \&git_blame_data,
 708         "blobdiff" => \&git_blobdiff,
 709         "blobdiff_plain" => \&git_blobdiff_plain,
 710         "blob" => \&git_blob,
 711         "blob_plain" => \&git_blob_plain,
 712         "commitdiff" => \&git_commitdiff,
 713         "commitdiff_plain" => \&git_commitdiff_plain,
 714         "commit" => \&git_commit,
 715         "forks" => \&git_forks,
 716         "heads" => \&git_heads,
 717         "history" => \&git_history,
 718         "log" => \&git_log,
 719         "patch" => \&git_patch,
 720         "patches" => \&git_patches,
 721         "rss" => \&git_rss,
 722         "atom" => \&git_atom,
 723         "search" => \&git_search,
 724         "search_help" => \&git_search_help,
 725         "shortlog" => \&git_shortlog,
 726         "summary" => \&git_summary,
 727         "tag" => \&git_tag,
 728         "tags" => \&git_tags,
 729         "tree" => \&git_tree,
 730         "snapshot" => \&git_snapshot,
 731         "object" => \&git_object,
 732         # those below don't need $project
 733         "opml" => \&git_opml,
 734         "project_list" => \&git_project_list,
 735         "project_index" => \&git_project_index,
 736 );
 737
 738 # finally, we have the hash of allowed extra_options for the commands that
 739 # allow them
 740 our %allowed_options = (
 741         "--no-merges" => [ qw(rss atom log shortlog history) ],
 742 );
 743
 744 # fill %input_params with the CGI parameters. All values except for 'opt'
 745 # should be single values, but opt can be an array. We should probably
 746 # build an array of parameters that can be multi-valued, but since for the time
 747 # being it's only this one, we just single it out
 748 sub evaluate_query_params {
 749         our $cgi;
 750
 751         while (my ($name, $symbol) = each %cgi_param_mapping) {
 752                 if ($symbol eq 'opt') {
 753                         $input_params{$name} = [ $cgi->param($symbol) ];
 754                 } else {
 755                         $input_params{$name} = $cgi->param($symbol);
 756                 }
 757         }
 758 }
 759
 760 # now read PATH_INFO and update the parameter list for missing parameters
 761 sub evaluate_path_info {
 762         return if defined $input_params{'project'};
 763         return if !$path_info;
 764         $path_info =~ s,^/+,,;
 765         return if !$path_info;
 766
 767         # find which part of PATH_INFO is project
 768         my $project = $path_info;
 769         $project =~ s,/+$,,;
 770         while ($project && !check_head_link("$projectroot/$project")) {
 771                 $project =~ s,/*[^/]*$,,;
 772         }
 773         return unless $project;
 774         $input_params{'project'} = $project;
 775
 776         # do not change any parameters if an action is given using the query string
 777         return if $input_params{'action'};
 778         $path_info =~ s,^\Q$project\E/*,,;
 779
 780         # next, check if we have an action
 781         my $action = $path_info;
 782         $action =~ s,/.*$,,;
 783         if (exists $actions{$action}) {
 784                 $path_info =~ s,^$action/*,,;
 785                 $input_params{'action'} = $action;
 786         }
 787
 788         # list of actions that want hash_base instead of hash, but can have no
 789         # pathname (f) parameter
 790         my @wants_base = (
 791                 'tree',
 792                 'history',
 793         );
 794
 795         # we want to catch, among others
 796         # [$hash_parent_base[:$file_parent]..]$hash_parent[:$file_name]
 797         my ($parentrefname, $parentpathname, $refname, $pathname) =
 798                 ($path_info =~ /^(?:(.+?)(?::(.+))?\.\.)?([^:]+?)?(?::(.+))?$/);
 799
 800         # first, analyze the 'current' part
 801         if (defined $pathname) {
 802                 # we got "branch:filename" or "branch:dir/"
 803                 # we could use git_get_type(branch:pathname), but:
 804                 # - it needs $git_dir
 805                 # - it does a git() call
 806                 # - the convention of terminating directories with a slash
 807                 #   makes it superfluous
 808                 # - embedding the action in the PATH_INFO would make it even
 809                 #   more superfluous
 810                 $pathname =~ s,^/+,,;
 811                 if (!$pathname || substr($pathname, -1) eq "/") {
 812                         $input_params{'action'} ||= "tree";
 813                         $pathname =~ s,/$,,;
 814                 } else {
 815                         # the default action depends on whether we had parent info
 816                         # or not
 817                         if ($parentrefname) {
 818                                 $input_params{'action'} ||= "blobdiff_plain";
 819                         } else {
 820                                 $input_params{'action'} ||= "blob_plain";
 821                         }
 822                 }
 823                 $input_params{'hash_base'} ||= $refname;
 824                 $input_params{'file_name'} ||= $pathname;
 825         } elsif (defined $refname) {
 826                 # we got "branch". In this case we have to choose if we have to
 827                 # set hash or hash_base.
 828                 #
 829                 # Most of the actions without a pathname only want hash to be
 830                 # set, except for the ones specified in @wants_base that want
 831                 # hash_base instead. It should also be noted that hand-crafted
 832                 # links having 'history' as an action and no pathname or hash
 833                 # set will fail, but that happens regardless of PATH_INFO.
 834                 if (defined $parentrefname) {
 835                         # if there is parent let the default be 'shortlog' action
 836                         # (for http://git.example.com/repo.git/A..B links); if there
 837                         # is no parent, dispatch will detect type of object and set
 838                         # action appropriately if required (if action is not set)
 839                         $input_params{'action'} ||= "shortlog";
 840                 }
 841                 if ($input_params{'action'} &&
 842                     grep { $_ eq $input_params{'action'} } @wants_base) {
 843                         $input_params{'hash_base'} ||= $refname;
 844                 } else {
 845                         $input_params{'hash'} ||= $refname;
 846                 }
 847         }
 848
 849         # next, handle the 'parent' part, if present
 850         if (defined $parentrefname) {
 851                 # a missing pathspec defaults to the 'current' filename, allowing e.g.
 852                 # someproject/blobdiff/oldrev..newrev:/filename
 853                 if ($parentpathname) {
 854                         $parentpathname =~ s,^/+,,;
 855                         $parentpathname =~ s,/$,,;
 856                         $input_params{'file_parent'} ||= $parentpathname;
 857                 } else {
 858                         $input_params{'file_parent'} ||= $input_params{'file_name'};
 859                 }
 860                 # we assume that hash_parent_base is wanted if a path was specified,
 861                 # or if the action wants hash_base instead of hash
 862                 if (defined $input_params{'file_parent'} ||
 863                         grep { $_ eq $input_params{'action'} } @wants_base) {
 864                         $input_params{'hash_parent_base'} ||= $parentrefname;
 865                 } else {
 866                         $input_params{'hash_parent'} ||= $parentrefname;
 867                 }
 868         }
 869
 870         # for the snapshot action, we allow URLs in the form
 871         # $project/snapshot/$hash.ext
 872         # where .ext determines the snapshot and gets removed from the
 873         # passed $refname to provide the $hash.
 874         #
 875         # To be able to tell that $refname includes the format extension, we
 876         # require the following two conditions to be satisfied:
 877         # - the hash input parameter MUST have been set from the $refname part
 878         #   of the URL (i.e. they must be equal)
 879         # - the snapshot format MUST NOT have been defined already (e.g. from
 880         #   CGI parameter sf)
 881         # It's also useless to try any matching unless $refname has a dot,
 882         # so we check for that too
 883         if (defined $input_params{'action'} &&
 884                 $input_params{'action'} eq 'snapshot' &&
 885                 defined $refname && index($refname, '.') != -1 &&
 886                 $refname eq $input_params{'hash'} &&
 887                 !defined $input_params{'snapshot_format'}) {
 888                 # We loop over the known snapshot formats, checking for
 889                 # extensions. Allowed extensions are both the defined suffix
 890                 # (which includes the initial dot already) and the snapshot
 891                 # format key itself, with a prepended dot
 892                 while (my ($fmt, $opt) = each %known_snapshot_formats) {
 893                         my $hash = $refname;
 894                         unless ($hash =~ s/(\Q$opt->{'suffix'}\E|\Q.$fmt\E)$//) {
 895                                 next;
 896                         }
 897                         my $sfx = $1;
 898                         # a valid suffix was found, so set the snapshot format
 899                         # and reset the hash parameter
 900                         $input_params{'snapshot_format'} = $fmt;
 901                         $input_params{'hash'} = $hash;
 902                         # we also set the format suffix to the one requested
 903                         # in the URL: this way a request for e.g. .tgz returns
 904                         # a .tgz instead of a .tar.gz
 905                         $known_snapshot_formats{$fmt}{'suffix'} = $sfx;
 906                         last;
 907                 }
 908         }
 909 }
 910
 911 our ($action, $project, $file_name, $file_parent, $hash, $hash_parent, $hash_base,
 912      $hash_parent_base, @extra_options, $page, $searchtype, $search_use_regexp,
 913      $searchtext, $search_regexp);
 914 sub evaluate_and_validate_params {
 915         our $action = $input_params{'action'};
 916         if (defined $action) {
 917                 if (!validate_action($action)) {
 918                         die_error(400, "Invalid action parameter");
 919                 }
 920         }
 921
 922         # parameters which are pathnames
 923         our $project = $input_params{'project'};
 924         if (defined $project) {
 925                 if (!validate_project($project)) {
 926                         undef $project;
 927                         die_error(404, "No such project");
 928                 }
 929         }
 930
 931         our $file_name = $input_params{'file_name'};
 932         if (defined $file_name) {
 933                 if (!validate_pathname($file_name)) {
 934                         die_error(400, "Invalid file parameter");
 935                 }
 936         }
 937
 938         our $file_parent = $input_params{'file_parent'};
 939         if (defined $file_parent) {
 940                 if (!validate_pathname($file_parent)) {
 941                         die_error(400, "Invalid file parent parameter");
 942                 }
 943         }
 944
 945         # parameters which are refnames
 946         our $hash = $input_params{'hash'};
 947         if (defined $hash) {
 948                 if (!validate_refname($hash)) {
 949                         die_error(400, "Invalid hash parameter");
 950                 }
 951         }
 952
 953         our $hash_parent = $input_params{'hash_parent'};
 954         if (defined $hash_parent) {
 955                 if (!validate_refname($hash_parent)) {
 956                         die_error(400, "Invalid hash parent parameter");
 957                 }
 958         }
 959
 960         our $hash_base = $input_params{'hash_base'};
 961         if (defined $hash_base) {
 962                 if (!validate_refname($hash_base)) {
 963                         die_error(400, "Invalid hash base parameter");
 964                 }
 965         }
 966
 967         our @extra_options = @{$input_params{'extra_options'}};
 968         # @extra_options is always defined, since it can only be (currently) set from
 969         # CGI, and $cgi->param() returns the empty array in array context if the param
 970         # is not set
 971         foreach my $opt (@extra_options) {
 972                 if (not exists $allowed_options{$opt}) {
 973                         die_error(400, "Invalid option parameter");
 974                 }
 975                 if (not grep(/^$action$/, @{$allowed_options{$opt}})) {
 976                         die_error(400, "Invalid option parameter for this action");
 977                 }
 978         }
 979
 980         our $hash_parent_base = $input_params{'hash_parent_base'};
 981         if (defined $hash_parent_base) {
 982                 if (!validate_refname($hash_parent_base)) {
 983                         die_error(400, "Invalid hash parent base parameter");
 984                 }
 985         }
 986
 987         # other parameters
 988         our $page = $input_params{'page'};
 989         if (defined $page) {
 990                 if ($page =~ m/[^0-9]/) {
 991                         die_error(400, "Invalid page parameter");
 992                 }
 993         }
 994
 995         our $searchtype = $input_params{'searchtype'};
 996         if (defined $searchtype) {
 997                 if ($searchtype =~ m/[^a-z]/) {
 998                         die_error(400, "Invalid searchtype parameter");
 999                 }
1000         }
1001
1002         our $search_use_regexp = $input_params{'search_use_regexp'};
1003
1004         our $searchtext = $input_params{'searchtext'};
1005         our $search_regexp;
1006         if (defined $searchtext) {
1007                 if (length($searchtext) < 2) {
1008                         die_error(403, "At least two characters are required for search parameter");
1009                 }
1010                 $search_regexp = $search_use_regexp ? $searchtext : quotemeta $searchtext;
1011         }
1012 }
1013
1014 # path to the current git repository
1015 our $git_dir;
1016 sub evaluate_git_dir {
1017         our $git_dir = "$projectroot/$project" if $project;
1018 }
1019
1020 our (@snapshot_fmts, $git_avatar);
1021 sub configure_gitweb_features {
1022         # list of supported snapshot formats
1023         our @snapshot_fmts = gitweb_get_feature('snapshot');
1024         @snapshot_fmts = filter_snapshot_fmts(@snapshot_fmts);
1025
1026         # check that the avatar feature is set to a known provider name,
1027         # and for each provider check if the dependencies are satisfied.
1028         # if the provider name is invalid or the dependencies are not met,
1029         # reset $git_avatar to the empty string.
1030         our ($git_avatar) = gitweb_get_feature('avatar');
1031         if ($git_avatar eq 'gravatar') {
1032                 $git_avatar = '' unless (eval { require Digest::MD5; 1; });
1033         } elsif ($git_avatar eq 'picon') {
1034                 # no dependencies
1035         } else {
1036                 $git_avatar = '';
1037         }
1038 }
1039
1040 # custom error handler: 'die <message>' is Internal Server Error
1041 sub handle_errors_html {
1042         my $msg = shift; # it is already HTML escaped
1043
1044         # to avoid infinite loop where error occurs in die_error,
1045         # change handler to default handler, disabling handle_errors_html
1046         set_message("Error occured when inside die_error:\n$msg");
1047
1048         # you cannot jump out of die_error when called as error handler;
1049         # the subroutine set via CGI::Carp::set_message is called _after_
1050         # HTTP headers are already written, so it cannot write them itself
1051         die_error(undef, undef, $msg, -error_handler => 1, -no_http_header => 1);
1052 }
1053 set_message(\&handle_errors_html);
1054
1055 # dispatch
1056 sub dispatch {
1057         if (!defined $action) {
1058                 if (defined $hash) {
1059                         $action = git_get_type($hash);
1060                 } elsif (defined $hash_base && defined $file_name) {
1061                         $action = git_get_type("$hash_base:$file_name");
1062                 } elsif (defined $project) {
1063                         $action = 'summary';
1064                 } else {
1065                         $action = 'project_list';
1066                 }
1067         }
1068         if (!defined($actions{$action})) {
1069                 die_error(400, "Unknown action");
1070         }
1071         if ($action !~ m/^(?:opml|project_list|project_index)$/ &&
1072             !$project) {
1073                 die_error(400, "Project needed");
1074         }
1075         $actions{$action}->();
1076 }
1077
1078 sub reset_timer {
1079         our $t0 = [ gettimeofday() ]
1080                 if defined $t0;
1081         our $number_of_git_cmds = 0;
1082 }
1083
1084 sub run_request {
1085         reset_timer();
1086
1087         evaluate_uri();
1088         evaluate_gitweb_config();
1089         evaluate_git_version();
1090         check_loadavg();
1091
1092         # $projectroot and $projects_list might be set in gitweb config file
1093         $projects_list ||= $projectroot;
1094
1095         evaluate_query_params();
1096         evaluate_path_info();
1097         evaluate_and_validate_params();
1098         evaluate_git_dir();
1099
1100         configure_gitweb_features();
1101
1102         dispatch();
1103 }
1104
1105 our $is_last_request = sub { 1 };
1106 our ($pre_dispatch_hook, $post_dispatch_hook, $pre_listen_hook);
1107 our $CGI = 'CGI';
1108 our $cgi;
1109 sub configure_as_fcgi {
1110         require CGI::Fast;
1111         our $CGI = 'CGI::Fast';
1112
1113         my $request_number = 0;
1114         # let each child service 100 requests
1115         our $is_last_request = sub { ++$request_number > 100 };
1116 }
1117 sub evaluate_argv {
1118         my $script_name = $ENV{'SCRIPT_NAME'} || $ENV{'SCRIPT_FILENAME'} || __FILE__;
1119         configure_as_fcgi()
1120                 if $script_name =~ /\.fcgi$/;
1121
1122         return unless (@ARGV);
1123
1124         require Getopt::Long;
1125         Getopt::Long::GetOptions(
1126                 'fastcgi|fcgi|f' => \&configure_as_fcgi,
1127                 'nproc|n=i' => sub {
1128                         my ($arg, $val) = @_;
1129                         return unless eval { require FCGI::ProcManager; 1; };
1130                         my $proc_manager = FCGI::ProcManager->new({
1131                                 n_processes => $val,
1132                         });
1133                         our $pre_listen_hook    = sub { $proc_manager->pm_manage()        };
1134                         our $pre_dispatch_hook  = sub { $proc_manager->pm_pre_dispatch()  };
1135                         our $post_dispatch_hook = sub { $proc_manager->pm_post_dispatch() };
1136                 },
1137         );
1138 }
1139
1140 sub run {
1141         evaluate_argv();
1142
1143         $pre_listen_hook->()
1144                 if $pre_listen_hook;
1145
1146  REQUEST:
1147         while ($cgi = $CGI->new()) {
1148                 $pre_dispatch_hook->()
1149                         if $pre_dispatch_hook;
1150
1151                 run_request();
1152
1153                 $post_dispatch_hook->()
1154                         if $post_dispatch_hook;
1155
1156                 last REQUEST if ($is_last_request->());
1157         }
1158
1159  DONE_GITWEB:
1160         1;
1161 }
1162
1163 run();
1164
1165 if (defined caller) {
1166         # wrapped in a subroutine processing requests,
1167         # e.g. mod_perl with ModPerl::Registry, or PSGI with Plack::App::WrapCGI
1168         return;
1169 } else {
1170         # pure CGI script, serving single request
1171         exit;
1172 }
1173
1174 ## ======================================================================
1175 ## action links
1176
1177 # possible values of extra options
1178 # -full => 0|1      - use absolute/full URL ($my_uri/$my_url as base)
1179 # -replay => 1      - start from a current view (replay with modifications)
1180 # -path_info => 0|1 - don't use/use path_info URL (if possible)
1181 sub href {
1182         my %params = @_;
1183         # default is to use -absolute url() i.e. $my_uri
1184         my $href = $params{-full} ? $my_url : $my_uri;
1185
1186         $params{'project'} = $project unless exists $params{'project'};
1187
1188         if ($params{-replay}) {
1189                 while (my ($name, $symbol) = each %cgi_param_mapping) {
1190                         if (!exists $params{$name}) {
1191                                 $params{$name} = $input_params{$name};
1192                         }
1193                 }
1194         }
1195
1196         my $use_pathinfo = gitweb_check_feature('pathinfo');
1197         if (defined $params{'project'} &&
1198             (exists $params{-path_info} ? $params{-path_info} : $use_pathinfo)) {
1199                 # try to put as many parameters as possible in PATH_INFO:
1200                 #   - project name
1201                 #   - action
1202                 #   - hash_parent or hash_parent_base:/file_parent
1203                 #   - hash or hash_base:/filename
1204                 #   - the snapshot_format as an appropriate suffix
1205
1206                 # When the script is the root DirectoryIndex for the domain,
1207                 # $href here would be something like http://gitweb.example.com/
1208                 # Thus, we strip any trailing / from $href, to spare us double
1209                 # slashes in the final URL
1210                 $href =~ s,/$,,;
1211
1212                 # Then add the project name, if present
1213                 $href .= "/".esc_url($params{'project'});
1214                 delete $params{'project'};
1215
1216                 # since we destructively absorb parameters, we keep this
1217                 # boolean that remembers if we're handling a snapshot
1218                 my $is_snapshot = $params{'action'} eq 'snapshot';
1219
1220                 # Summary just uses the project path URL, any other action is
1221                 # added to the URL
1222                 if (defined $params{'action'}) {
1223                         $href .= "/".esc_url($params{'action'}) unless $params{'action'} eq 'summary';
1224                         delete $params{'action'};
1225                 }
1226
1227                 # Next, we put hash_parent_base:/file_parent..hash_base:/file_name,
1228                 # stripping nonexistent or useless pieces
1229                 $href .= "/" if ($params{'hash_base'} || $params{'hash_parent_base'}
1230                         || $params{'hash_parent'} || $params{'hash'});
1231                 if (defined $params{'hash_base'}) {
1232                         if (defined $params{'hash_parent_base'}) {
1233                                 $href .= esc_url($params{'hash_parent_base'});
1234                                 # skip the file_parent if it's the same as the file_name
1235                                 if (defined $params{'file_parent'}) {
1236                                         if (defined $params{'file_name'} && $params{'file_parent'} eq $params{'file_name'}) {
1237                                                 delete $params{'file_parent'};
1238                                         } elsif ($params{'file_parent'} !~ /\.\./) {
1239                                                 $href .= ":/".esc_url($params{'file_parent'});
1240                                                 delete $params{'file_parent'};
1241                                         }
1242                                 }
1243                                 $href .= "..";
1244                                 delete $params{'hash_parent'};
1245                                 delete $params{'hash_parent_base'};
1246                         } elsif (defined $params{'hash_parent'}) {
1247                                 $href .= esc_url($params{'hash_parent'}). "..";
1248                                 delete $params{'hash_parent'};
1249                         }
1250
1251                         $href .= esc_url($params{'hash_base'});
1252                         if (defined $params{'file_name'} && $params{'file_name'} !~ /\.\./) {
1253                                 $href .= ":/".esc_url($params{'file_name'});
1254                                 delete $params{'file_name'};
1255                         }
1256                         delete $params{'hash'};
1257                         delete $params{'hash_base'};
1258                 } elsif (defined $params{'hash'}) {
1259                         $href .= esc_url($params{'hash'});
1260                         delete $params{'hash'};
1261                 }
1262
1263                 # If the action was a snapshot, we can absorb the
1264                 # snapshot_format parameter too
1265                 if ($is_snapshot) {
1266                         my $fmt = $params{'snapshot_format'};
1267                         # snapshot_format should always be defined when href()
1268                         # is called, but just in case some code forgets, we
1269                         # fall back to the default
1270                         $fmt ||= $snapshot_fmts[0];
1271                         $href .= $known_snapshot_formats{$fmt}{'suffix'};
1272                         delete $params{'snapshot_format'};
1273                 }
1274         }
1275
1276         # now encode the parameters explicitly
1277         my @result = ();
1278         for (my $i = 0; $i < @cgi_param_mapping; $i += 2) {
1279                 my ($name, $symbol) = ($cgi_param_mapping[$i], $cgi_param_mapping[$i+1]);
1280                 if (defined $params{$name}) {
1281                         if (ref($params{$name}) eq "ARRAY") {
1282                                 foreach my $par (@{$params{$name}}) {
1283                                         push @result, $symbol . "=" . esc_param($par);
1284                                 }
1285                         } else {
1286                                 push @result, $symbol . "=" . esc_param($params{$name});
1287                         }
1288                 }
1289         }
1290         $href .= "?" . join(';', @result) if scalar @result;
1291
1292         return $href;
1293 }
1294
1295
1296 ## ======================================================================
1297 ## validation, quoting/unquoting and escaping
1298
1299 sub validate_action {
1300         my $input = shift || return undef;
1301         return undef unless exists $actions{$input};
1302         return $input;
1303 }
1304
1305 sub validate_project {
1306         my $input = shift || return undef;
1307         if (!validate_pathname($input) ||
1308                 !(-d "$projectroot/$input") ||
1309                 !check_export_ok("$projectroot/$input") ||
1310                 ($strict_export && !project_in_list($input))) {
1311                 return undef;
1312         } else {
1313                 return $input;
1314         }
1315 }
1316
1317 sub validate_pathname {
1318         my $input = shift || return undef;
1319
1320         # no '.' or '..' as elements of path, i.e. no '.' nor '..'
1321         # at the beginning, at the end, and between slashes.
1322         # also this catches doubled slashes
1323         if ($input =~ m!(^|/)(|\.|\.\.)(/|$)!) {
1324                 return undef;
1325         }
1326         # no null characters
1327         if ($input =~ m!\0!) {
1328                 return undef;
1329         }
1330         return $input;
1331 }
1332
1333 sub validate_refname {
1334         my $input = shift || return undef;
1335
1336         # textual hashes are O.K.
1337         if ($input =~ m/^[0-9a-fA-F]{40}$/) {
1338                 return $input;
1339         }
1340         # it must be correct pathname
1341         $input = validate_pathname($input)
1342                 or return undef;
1343         # restrictions on ref name according to git-check-ref-format
1344         if ($input =~ m!(/\.|\.\.|[\000-\040\177 ~^:?*\[]|/$)!) {
1345                 return undef;
1346         }
1347         return $input;
1348 }
1349
1350 # decode sequences of octets in utf8 into Perl's internal form,
1351 # which is utf-8 with utf8 flag set if needed.  gitweb writes out
1352 # in utf-8 thanks to "binmode STDOUT, ':utf8'" at beginning
1353 sub to_utf8 {
1354         my $str = shift;
1355         return undef unless defined $str;
1356         if (utf8::valid($str)) {
1357                 utf8::decode($str);
1358                 return $str;
1359         } else {
1360                 return decode($fallback_encoding, $str, Encode::FB_DEFAULT);
1361         }
1362 }
1363
1364 # quote unsafe chars, but keep the slash, even when it's not
1365 # correct, but quoted slashes look too horrible in bookmarks
1366 sub esc_param {
1367         my $str = shift;
1368         return undef unless defined $str;
1369         $str =~ s/([^A-Za-z0-9\-_.~()\/:@ ]+)/CGI::escape($1)/eg;
1370         $str =~ s/ /\+/g;
1371         return $str;
1372 }
1373
1374 # quote unsafe chars in whole URL, so some characters cannot be quoted
1375 sub esc_url {
1376         my $str = shift;
1377         return undef unless defined $str;
1378         $str =~ s/([^A-Za-z0-9\-_.~();\/;?:@&= ]+)/CGI::escape($1)/eg;
1379         $str =~ s/ /\+/g;
1380         return $str;
1381 }
1382
1383 # replace invalid utf8 character with SUBSTITUTION sequence
1384 sub esc_html {
1385         my $str = shift;
1386         my %opts = @_;
1387
1388         return undef unless defined $str;
1389
1390         $str = to_utf8($str);
1391         $str = $cgi->escapeHTML($str);
1392         if ($opts{'-nbsp'}) {
1393                 $str =~ s/ /&nbsp;/g;
1394         }
1395         $str =~ s|([[:cntrl:]])|(($1 ne "\t") ? quot_cec($1) : $1)|eg;
1396         return $str;
1397 }
1398
1399 # quote control characters and escape filename to HTML
1400 sub esc_path {
1401         my $str = shift;
1402         my %opts = @_;
1403
1404         return undef unless defined $str;
1405
1406         $str = to_utf8($str);
1407         $str = $cgi->escapeHTML($str);
1408         if ($opts{'-nbsp'}) {
1409                 $str =~ s/ /&nbsp;/g;
1410         }
1411         $str =~ s|([[:cntrl:]])|quot_cec($1)|eg;
1412         return $str;
1413 }
1414
1415 # Make control characters "printable", using character escape codes (CEC)
1416 sub quot_cec {
1417         my $cntrl = shift;
1418         my %opts = @_;
1419         my %es = ( # character escape codes, aka escape sequences
1420                 "\t" => '\t',   # tab            (HT)
1421                 "\n" => '\n',   # line feed      (LF)
1422                 "\r" => '\r',   # carrige return (CR)
1423                 "\f" => '\f',   # form feed      (FF)
1424                 "\b" => '\b',   # backspace      (BS)
1425                 "\a" => '\a',   # alarm (bell)   (BEL)
1426                 "\e" => '\e',   # escape         (ESC)
1427                 "\013" => '\v', # vertical tab   (VT)
1428                 "\000" => '\0', # nul character  (NUL)
1429         );
1430         my $chr = ( (exists $es{$cntrl})
1431                     ? $es{$cntrl}
1432                     : sprintf('\%2x', ord($cntrl)) );
1433         if ($opts{-nohtml}) {
1434                 return $chr;
1435         } else {
1436                 return "<span class=\"cntrl\">$chr</span>";
1437         }
1438 }
1439
1440 # Alternatively use unicode control pictures codepoints,
1441 # Unicode "printable representation" (PR)
1442 sub quot_upr {
1443         my $cntrl = shift;
1444         my %opts = @_;
1445
1446         my $chr = sprintf('&#%04d;', 0x2400+ord($cntrl));
1447         if ($opts{-nohtml}) {
1448                 return $chr;
1449         } else {
1450                 return "<span class=\"cntrl\">$chr</span>";
1451         }
1452 }
1453
1454 # git may return quoted and escaped filenames
1455 sub unquote {
1456         my $str = shift;
1457
1458         sub unq {
1459                 my $seq = shift;
1460                 my %es = ( # character escape codes, aka escape sequences
1461                         't' => "\t",   # tab            (HT, TAB)
1462                         'n' => "\n",   # newline        (NL)
1463                         'r' => "\r",   # return         (CR)
1464                         'f' => "\f",   # form feed      (FF)
1465                         'b' => "\b",   # backspace      (BS)
1466                         'a' => "\a",   # alarm (bell)   (BEL)
1467                         'e' => "\e",   # escape         (ESC)
1468                         'v' => "\013", # vertical tab   (VT)
1469                 );
1470
1471                 if ($seq =~ m/^[0-7]{1,3}$/) {
1472                         # octal char sequence
1473                         return chr(oct($seq));
1474                 } elsif (exists $es{$seq}) {
1475                         # C escape sequence, aka character escape code
1476                         return $es{$seq};
1477                 }
1478                 # quoted ordinary character
1479                 return $seq;
1480         }
1481
1482         if ($str =~ m/^"(.*)"$/) {
1483                 # needs unquoting
1484                 $str = $1;
1485                 $str =~ s/\\([^0-7]|[0-7]{1,3})/unq($1)/eg;
1486         }
1487         return $str;
1488 }
1489
1490 # escape tabs (convert tabs to spaces)
1491 sub untabify {
1492         my $line = shift;
1493
1494         while ((my $pos = index($line, "\t")) != -1) {
1495                 if (my $count = (8 - ($pos % 8))) {
1496                         my $spaces = ' ' x $count;
1497                         $line =~ s/\t/$spaces/;
1498                 }
1499         }
1500
1501         return $line;
1502 }
1503
1504 sub project_in_list {
1505         my $project = shift;
1506         my @list = git_get_projects_list();
1507         return @list && scalar(grep { $_->{'path'} eq $project } @list);
1508 }
1509
1510 ## ----------------------------------------------------------------------
1511 ## HTML aware string manipulation
1512
1513 # Try to chop given string on a word boundary between position
1514 # $len and $len+$add_len. If there is no word boundary there,
1515 # chop at $len+$add_len. Do not chop if chopped part plus ellipsis
1516 # (marking chopped part) would be longer than given string.
1517 sub chop_str {
1518         my $str = shift;
1519         my $len = shift;
1520         my $add_len = shift || 10;
1521         my $where = shift || 'right'; # 'left' | 'center' | 'right'
1522
1523         # Make sure perl knows it is utf8 encoded so we don't
1524         # cut in the middle of a utf8 multibyte char.
1525         $str = to_utf8($str);
1526
1527         # allow only $len chars, but don't cut a word if it would fit in $add_len
1528         # if it doesn't fit, cut it if it's still longer than the dots we would add
1529         # remove chopped character entities entirely
1530
1531         # when chopping in the middle, distribute $len into left and right part
1532         # return early if chopping wouldn't make string shorter
1533         if ($where eq 'center') {
1534                 return $str if ($len + 5 >= length($str)); # filler is length 5
1535                 $len = int($len/2);
1536         } else {
1537                 return $str if ($len + 4 >= length($str)); # filler is length 4
1538         }
1539
1540         # regexps: ending and beginning with word part up to $add_len
1541         my $endre = qr/.{$len}\w{0,$add_len}/;
1542         my $begre = qr/\w{0,$add_len}.{$len}/;
1543
1544         if ($where eq 'left') {
1545                 $str =~ m/^(.*?)($begre)$/;
1546                 my ($lead, $body) = ($1, $2);
1547                 if (length($lead) > 4) {
1548                         $lead = " ...";
1549                 }
1550                 return "$lead$body";
1551
1552         } elsif ($where eq 'center') {
1553                 $str =~ m/^($endre)(.*)$/;
1554                 my ($left, $str)  = ($1, $2);
1555                 $str =~ m/^(.*?)($begre)$/;
1556                 my ($mid, $right) = ($1, $2);
1557                 if (length($mid) > 5) {
1558                         $mid = " ... ";
1559                 }
1560                 return "$left$mid$right";
1561
1562         } else {
1563                 $str =~ m/^($endre)(.*)$/;
1564                 my $body = $1;
1565                 my $tail = $2;
1566                 if (length($tail) > 4) {
1567                         $tail = "... ";
1568                 }
1569                 return "$body$tail";
1570         }
1571 }
1572
1573 # takes the same arguments as chop_str, but also wraps a <span> around the
1574 # result with a title attribute if it does get chopped. Additionally, the
1575 # string is HTML-escaped.
1576 sub chop_and_escape_str {
1577         my ($str) = @_;
1578
1579         my $chopped = chop_str(@_);
1580         if ($chopped eq $str) {
1581                 return esc_html($chopped);
1582         } else {
1583                 $str =~ s/[[:cntrl:]]/?/g;
1584                 return $cgi->span({-title=>$str}, esc_html($chopped));
1585         }
1586 }
1587
1588 ## ----------------------------------------------------------------------
1589 ## functions returning short strings
1590
1591 # CSS class for given age value (in seconds)
1592 sub age_class {
1593         my $age = shift;
1594
1595         if (!defined $age) {
1596                 return "noage";
1597         } elsif ($age < 60*60*2) {
1598                 return "age0";
1599         } elsif ($age < 60*60*24*2) {
1600                 return "age1";
1601         } else {
1602                 return "age2";
1603         }
1604 }
1605
1606 # convert age in seconds to "nn units ago" string
1607 sub age_string {
1608         my $age = shift;
1609         my $age_str;
1610
1611         if ($age > 60*60*24*365*2) {
1612                 $age_str = (int $age/60/60/24/365);
1613                 $age_str .= " years ago";
1614         } elsif ($age > 60*60*24*(365/12)*2) {
1615                 $age_str = int $age/60/60/24/(365/12);
1616                 $age_str .= " months ago";
1617         } elsif ($age > 60*60*24*7*2) {
1618                 $age_str = int $age/60/60/24/7;
1619                 $age_str .= " weeks ago";
1620         } elsif ($age > 60*60*24*2) {
1621                 $age_str = int $age/60/60/24;
1622                 $age_str .= " days ago";
1623         } elsif ($age > 60*60*2) {
1624                 $age_str = int $age/60/60;
1625                 $age_str .= " hours ago";
1626         } elsif ($age > 60*2) {
1627                 $age_str = int $age/60;
1628                 $age_str .= " min ago";
1629         } elsif ($age > 2) {
1630                 $age_str = int $age;
1631                 $age_str .= " sec ago";
1632         } else {
1633                 $age_str .= " right now";
1634         }
1635         return $age_str;
1636 }
1637
1638 use constant {
1639         S_IFINVALID => 0030000,
1640         S_IFGITLINK => 0160000,
1641 };
1642
1643 # submodule/subproject, a commit object reference
1644 sub S_ISGITLINK {
1645         my $mode = shift;
1646
1647         return (($mode & S_IFMT) == S_IFGITLINK)
1648 }
1649
1650 # convert file mode in octal to symbolic file mode string
1651 sub mode_str {
1652         my $mode = oct shift;
1653
1654         if (S_ISGITLINK($mode)) {
1655                 return 'm---------';
1656         } elsif (S_ISDIR($mode & S_IFMT)) {
1657                 return 'drwxr-xr-x';
1658         } elsif (S_ISLNK($mode)) {
1659                 return 'lrwxrwxrwx';
1660         } elsif (S_ISREG($mode)) {
1661                 # git cares only about the executable bit
1662                 if ($mode & S_IXUSR) {
1663                         return '-rwxr-xr-x';
1664                 } else {
1665                         return '-rw-r--r--';
1666                 };
1667         } else {
1668                 return '----------';
1669         }
1670 }
1671
1672 # convert file mode in octal to file type string
1673 sub file_type {
1674         my $mode = shift;
1675
1676         if ($mode !~ m/^[0-7]+$/) {
1677                 return $mode;
1678         } else {
1679                 $mode = oct $mode;
1680         }
1681
1682         if (S_ISGITLINK($mode)) {
1683                 return "submodule";
1684         } elsif (S_ISDIR($mode & S_IFMT)) {
1685                 return "directory";
1686         } elsif (S_ISLNK($mode)) {
1687                 return "symlink";
1688         } elsif (S_ISREG($mode)) {
1689                 return "file";
1690         } else {
1691                 return "unknown";
1692         }
1693 }
1694
1695 # convert file mode in octal to file type description string
1696 sub file_type_long {
1697         my $mode = shift;
1698
1699         if ($mode !~ m/^[0-7]+$/) {
1700                 return $mode;
1701         } else {
1702                 $mode = oct $mode;
1703         }
1704
1705         if (S_ISGITLINK($mode)) {
1706                 return "submodule";
1707         } elsif (S_ISDIR($mode & S_IFMT)) {
1708                 return "directory";
1709         } elsif (S_ISLNK($mode)) {
1710                 return "symlink";
1711         } elsif (S_ISREG($mode)) {
1712                 if ($mode & S_IXUSR) {
1713                         return "executable";
1714                 } else {
1715                         return "file";
1716                 };
1717         } else {
1718                 return "unknown";
1719         }
1720 }
1721
1722
1723 ## ----------------------------------------------------------------------
1724 ## functions returning short HTML fragments, or transforming HTML fragments
1725 ## which don't belong to other sections
1726
1727 # format line of commit message.
1728 sub format_log_line_html {
1729         my $line = shift;
1730
1731         $line = esc_html($line, -nbsp=>1);
1732         $line =~ s{\b([0-9a-fA-F]{8,40})\b}{
1733                 $cgi->a({-href => href(action=>"object", hash=>$1),
1734                                         -class => "text"}, $1);
1735         }eg;
1736
1737         return $line;
1738 }
1739
1740 # format marker of refs pointing to given object
1741
1742 # the destination action is chosen based on object type and current context:
1743 # - for annotated tags, we choose the tag view unless it's the current view
1744 #   already, in which case we go to shortlog view
1745 # - for other refs, we keep the current view if we're in history, shortlog or
1746 #   log view, and select shortlog otherwise
1747 sub format_ref_marker {
1748         my ($refs, $id) = @_;
1749         my $markers = '';
1750
1751         if (defined $refs->{$id}) {
1752                 foreach my $ref (@{$refs->{$id}}) {
1753                         # this code exploits the fact that non-lightweight tags are the
1754                         # only indirect objects, and that they are the only objects for which
1755                         # we want to use tag instead of shortlog as action
1756                         my ($type, $name) = qw();
1757                         my $indirect = ($ref =~ s/\^\{\}$//);
1758                         # e.g. tags/v2.6.11 or heads/next
1759                         if ($ref =~ m!^(.*?)s?/(.*)$!) {
1760                                 $type = $1;
1761                                 $name = $2;
1762                         } else {
1763                                 $type = "ref";
1764                                 $name = $ref;
1765                         }
1766
1767                         my $class = $type;
1768                         $class .= " indirect" if $indirect;
1769
1770                         my $dest_action = "shortlog";
1771
1772                         if ($indirect) {
1773                                 $dest_action = "tag" unless $action eq "tag";
1774                         } elsif ($action =~ /^(history|(short)?log)$/) {
1775                                 $dest_action = $action;
1776                         }
1777
1778                         my $dest = "";
1779                         $dest .= "refs/" unless $ref =~ m!^refs/!;
1780                         $dest .= $ref;
1781
1782                         my $link = $cgi->a({
1783                                 -href => href(
1784                                         action=>$dest_action,
1785                                         hash=>$dest
1786                                 )}, $name);
1787
1788                         $markers .= " <span class=\"$class\" title=\"$ref\">" .
1789                                 $link . "</span>";
1790                 }
1791         }
1792
1793         if ($markers) {
1794                 return ' <span class="refs">'. $markers . '</span>';
1795         } else {
1796                 return "";
1797         }
1798 }
1799
1800 # format, perhaps shortened and with markers, title line
1801 sub format_subject_html {
1802         my ($long, $short, $href, $extra) = @_;
1803         $extra = '' unless defined($extra);
1804
1805         if (length($short) < length($long)) {
1806                 $long =~ s/[[:cntrl:]]/?/g;
1807                 return $cgi->a({-href => $href, -class => "list subject",
1808                                 -title => to_utf8($long)},
1809                        esc_html($short)) . $extra;
1810         } else {
1811                 return $cgi->a({-href => $href, -class => "list subject"},
1812                        esc_html($long)) . $extra;
1813         }
1814 }
1815
1816 # Rather than recomputing the url for an email multiple times, we cache it
1817 # after the first hit. This gives a visible benefit in views where the avatar
1818 # for the same email is used repeatedly (e.g. shortlog).
1819 # The cache is shared by all avatar engines (currently gravatar only), which
1820 # are free to use it as preferred. Since only one avatar engine is used for any
1821 # given page, there's no risk for cache conflicts.
1822 our %avatar_cache = ();
1823
1824 # Compute the picon url for a given email, by using the picon search service over at
1825 # http://www.cs.indiana.edu/picons/search.html
1826 sub picon_url {
1827         my $email = lc shift;
1828         if (!$avatar_cache{$email}) {
1829                 my ($user, $domain) = split('@', $email);
1830                 $avatar_cache{$email} =
1831                         "http://www.cs.indiana.edu/cgi-pub/kinzler/piconsearch.cgi/" .
1832                         "$domain/$user/" .
1833                         "users+domains+unknown/up/single";
1834         }
1835         return $avatar_cache{$email};
1836 }
1837
1838 # Compute the gravatar url for a given email, if it's not in the cache already.
1839 # Gravatar stores only the part of the URL before the size, since that's the
1840 # one computationally more expensive. This also allows reuse of the cache for
1841 # different sizes (for this particular engine).
1842 sub gravatar_url {
1843         my $email = lc shift;
1844         my $size = shift;
1845         $avatar_cache{$email} ||=
1846                 "http://www.gravatar.com/avatar/" .
1847                         Digest::MD5::md5_hex($email) . "?s=";
1848         return $avatar_cache{$email} . $size;
1849 }
1850
1851 # Insert an avatar for the given $email at the given $size if the feature
1852 # is enabled.
1853 sub git_get_avatar {
1854         my ($email, %opts) = @_;
1855         my $pre_white  = ($opts{-pad_before} ? "&nbsp;" : "");
1856         my $post_white = ($opts{-pad_after}  ? "&nbsp;" : "");
1857         $opts{-size} ||= 'default';
1858         my $size = $avatar_size{$opts{-size}} || $avatar_size{'default'};
1859         my $url = "";
1860         if ($git_avatar eq 'gravatar') {
1861                 $url = gravatar_url($email, $size);
1862         } elsif ($git_avatar eq 'picon') {
1863                 $url = picon_url($email);
1864         }
1865         # Other providers can be added by extending the if chain, defining $url
1866         # as needed. If no variant puts something in $url, we assume avatars
1867         # are completely disabled/unavailable.
1868         if ($url) {
1869                 return $pre_white .
1870                        "<img width=\"$size\" " .
1871                             "class=\"avatar\" " .
1872                             "src=\"$url\" " .
1873                             "alt=\"\" " .
1874                        "/>" . $post_white;
1875         } else {
1876                 return "";
1877         }
1878 }
1879
1880 sub format_search_author {
1881         my ($author, $searchtype, $displaytext) = @_;
1882         my $have_search = gitweb_check_feature('search');
1883
1884         if ($have_search) {
1885                 my $performed = "";
1886                 if ($searchtype eq 'author') {
1887                         $performed = "authored";
1888                 } elsif ($searchtype eq 'committer') {
1889                         $performed = "committed";
1890                 }
1891
1892                 return $cgi->a({-href => href(action=>"search", hash=>$hash,
1893                                 searchtext=>$author,
1894                                 searchtype=>$searchtype), class=>"list",
1895                                 title=>"Search for commits $performed by $author"},
1896                                 $displaytext);
1897
1898         } else {
1899                 return $displaytext;
1900         }
1901 }
1902
1903 # format the author name of the given commit with the given tag
1904 # the author name is chopped and escaped according to the other
1905 # optional parameters (see chop_str).
1906 sub format_author_html {
1907         my $tag = shift;
1908         my $co = shift;
1909         my $author = chop_and_escape_str($co->{'author_name'}, @_);
1910         return "<$tag class=\"author\">" .
1911                format_search_author($co->{'author_name'}, "author",
1912                        git_get_avatar($co->{'author_email'}, -pad_after => 1) .
1913                        $author) .
1914                "</$tag>";
1915 }
1916
1917 # format git diff header line, i.e. "diff --(git|combined|cc) ..."
1918 sub format_git_diff_header_line {
1919         my $line = shift;
1920         my $diffinfo = shift;
1921         my ($from, $to) = @_;
1922
1923         if ($diffinfo->{'nparents'}) {
1924                 # combined diff
1925                 $line =~ s!^(diff (.*?) )"?.*$!$1!;
1926                 if ($to->{'href'}) {
1927                         $line .= $cgi->a({-href => $to->{'href'}, -class => "path"},
1928                                          esc_path($to->{'file'}));
1929                 } else { # file was deleted (no href)
1930                         $line .= esc_path($to->{'file'});
1931                 }
1932         } else {
1933                 # "ordinary" diff
1934                 $line =~ s!^(diff (.*?) )"?a/.*$!$1!;
1935                 if ($from->{'href'}) {
1936                         $line .= $cgi->a({-href => $from->{'href'}, -class => "path"},
1937                                          'a/' . esc_path($from->{'file'}));
1938                 } else { # file was added (no href)
1939                         $line .= 'a/' . esc_path($from->{'file'});
1940                 }
1941                 $line .= ' ';
1942                 if ($to->{'href'}) {
1943                         $line .= $cgi->a({-href => $to->{'href'}, -class => "path"},
1944                                          'b/' . esc_path($to->{'file'}));
1945                 } else { # file was deleted
1946                         $line .= 'b/' . esc_path($to->{'file'});
1947                 }
1948         }
1949
1950         return "<div class=\"diff header\">$line</div>\n";
1951 }
1952
1953 # format extended diff header line, before patch itself
1954 sub format_extended_diff_header_line {
1955         my $line = shift;
1956         my $diffinfo = shift;
1957         my ($from, $to) = @_;
1958
1959         # match <path>
1960         if ($line =~ s!^((copy|rename) from ).*$!$1! && $from->{'href'}) {
1961                 $line .= $cgi->a({-href=>$from->{'href'}, -class=>"path"},
1962                                        esc_path($from->{'file'}));
1963         }
1964         if ($line =~ s!^((copy|rename) to ).*$!$1! && $to->{'href'}) {
1965                 $line .= $cgi->a({-href=>$to->{'href'}, -class=>"path"},
1966                                  esc_path($to->{'file'}));
1967         }
1968         # match single <mode>
1969         if ($line =~ m/\s(\d{6})$/) {
1970                 $line .= '<span class="info"> (' .
1971                          file_type_long($1) .
1972                          ')</span>';
1973         }
1974         # match <hash>
1975         if ($line =~ m/^index [0-9a-fA-F]{40},[0-9a-fA-F]{40}/) {
1976                 # can match only for combined diff
1977                 $line = 'index ';
1978                 for (my $i = 0; $i < $diffinfo->{'nparents'}; $i++) {
1979                         if ($from->{'href'}[$i]) {
1980                                 $line .= $cgi->a({-href=>$from->{'href'}[$i],
1981                                                   -class=>"hash"},
1982                                                  substr($diffinfo->{'from_id'}[$i],0,7));
1983                         } else {
1984                                 $line .= '0' x 7;
1985                         }
1986                         # separator
1987                         $line .= ',' if ($i < $diffinfo->{'nparents'} - 1);
1988                 }
1989                 $line .= '..';
1990                 if ($to->{'href'}) {
1991                         $line .= $cgi->a({-href=>$to->{'href'}, -class=>"hash"},
1992                                          substr($diffinfo->{'to_id'},0,7));
1993                 } else {
1994                         $line .= '0' x 7;
1995                 }
1996
1997         } elsif ($line =~ m/^index [0-9a-fA-F]{40}..[0-9a-fA-F]{40}/) {
1998                 # can match only for ordinary diff
1999                 my ($from_link, $to_link);
2000                 if ($from->{'href'}) {
2001                         $from_link = $cgi->a({-href=>$from->{'href'}, -class=>"hash"},
2002                                              substr($diffinfo->{'from_id'},0,7));
2003                 } else {
2004                         $from_link = '0' x 7;
2005                 }
2006                 if ($to->{'href'}) {
2007                         $to_link = $cgi->a({-href=>$to->{'href'}, -class=>"hash"},
2008                                            substr($diffinfo->{'to_id'},0,7));
2009                 } else {
2010                         $to_link = '0' x 7;
2011                 }
2012                 my ($from_id, $to_id) = ($diffinfo->{'from_id'}, $diffinfo->{'to_id'});
2013                 $line =~ s!$from_id\.\.$to_id!$from_link..$to_link!;
2014         }
2015
2016         return $line . "<br/>\n";
2017 }
2018
2019 # format from-file/to-file diff header
2020 sub format_diff_from_to_header {
2021         my ($from_line, $to_line, $diffinfo, $from, $to, @parents) = @_;
2022         my $line;
2023         my $result = '';
2024
2025         $line = $from_line;
2026         #assert($line =~ m/^---/) if DEBUG;
2027         # no extra formatting for "^--- /dev/null"
2028         if (! $diffinfo->{'nparents'}) {
2029                 # ordinary (single parent) diff
2030                 if ($line =~ m!^--- "?a/!) {
2031                         if ($from->{'href'}) {
2032                                 $line = '--- a/' .
2033                                         $cgi->a({-href=>$from->{'href'}, -class=>"path"},
2034                                                 esc_path($from->{'file'}));
2035                         } else {
2036                                 $line = '--- a/' .
2037                                         esc_path($from->{'file'});
2038                         }
2039                 }
2040                 $result .= qq!<div class="diff from_file">$line</div>\n!;
2041
2042         } else {
2043                 # combined diff (merge commit)
2044                 for (my $i = 0; $i < $diffinfo->{'nparents'}; $i++) {
2045                         if ($from->{'href'}[$i]) {
2046                                 $line = '--- ' .
2047                                         $cgi->a({-href=>href(action=>"blobdiff",
2048                                                              hash_parent=>$diffinfo->{'from_id'}[$i],
2049                                                              hash_parent_base=>$parents[$i],
2050                                                              file_parent=>$from->{'file'}[$i],
2051                                                              hash=>$diffinfo->{'to_id'},
2052                                                              hash_base=>$hash,
2053                                                              file_name=>$to->{'file'}),
2054                                                  -class=>"path",
2055                                                  -title=>"diff" . ($i+1)},
2056                                                 $i+1) .
2057                                         '/' .
2058                                         $cgi->a({-href=>$from->{'href'}[$i], -class=>"path"},
2059                                                 esc_path($from->{'file'}[$i]));
2060                         } else {
2061                                 $line = '--- /dev/null';
2062                         }
2063                         $result .= qq!<div class="diff from_file">$line</div>\n!;
2064                 }
2065         }
2066
2067         $line = $to_line;
2068         #assert($line =~ m/^\+\+\+/) if DEBUG;
2069         # no extra formatting for "^+++ /dev/null"
2070         if ($line =~ m!^\+\+\+ "?b/!) {
2071                 if ($to->{'href'}) {
2072                         $line = '+++ b/' .
2073                                 $cgi->a({-href=>$to->{'href'}, -class=>"path"},
2074                                         esc_path($to->{'file'}));
2075                 } else {
2076                         $line = '+++ b/' .
2077                                 esc_path($to->{'file'});
2078                 }
2079         }
2080         $result .= qq!<div class="diff to_file">$line</div>\n!;
2081
2082         return $result;
2083 }
2084
2085 # create note for patch simplified by combined diff
2086 sub format_diff_cc_simplified {
2087         my ($diffinfo, @parents) = @_;
2088         my $result = '';
2089
2090         $result .= "<div class=\"diff header\">" .
2091                    "diff --cc ";
2092         if (!is_deleted($diffinfo)) {
2093                 $result .= $cgi->a({-href => href(action=>"blob",
2094                                                   hash_base=>$hash,
2095                                                   hash=>$diffinfo->{'to_id'},
2096                                                   file_name=>$diffinfo->{'to_file'}),
2097                                     -class => "path"},
2098                                    esc_path($diffinfo->{'to_file'}));
2099         } else {
2100                 $result .= esc_path($diffinfo->{'to_file'});
2101         }
2102         $result .= "</div>\n" . # class="diff header"
2103                    "<div class=\"diff nodifferences\">" .
2104                    "Simple merge" .
2105                    "</div>\n"; # class="diff nodifferences"
2106
2107         return $result;
2108 }
2109
2110 # format patch (diff) line (not to be used for diff headers)
2111 sub format_diff_line {
2112         my $line = shift;
2113         my ($from, $to) = @_;
2114         my $diff_class = "";
2115
2116         chomp $line;
2117
2118         if ($from && $to && ref($from->{'href'}) eq "ARRAY") {
2119                 # combined diff
2120                 my $prefix = substr($line, 0, scalar @{$from->{'href'}});
2121                 if ($line =~ m/^\@{3}/) {
2122                         $diff_class = " chunk_header";
2123                 } elsif ($line =~ m/^\\/) {
2124                         $diff_class = " incomplete";
2125                 } elsif ($prefix =~ tr/+/+/) {
2126                         $diff_class = " add";
2127                 } elsif ($prefix =~ tr/-/-/) {
2128                         $diff_class = " rem";
2129                 }
2130         } else {
2131                 # assume ordinary diff
2132                 my $char = substr($line, 0, 1);
2133                 if ($char eq '+') {
2134                         $diff_class = " add";
2135                 } elsif ($char eq '-') {
2136                         $diff_class = " rem";
2137                 } elsif ($char eq '@') {
2138                         $diff_class = " chunk_header";
2139                 } elsif ($char eq "\\") {
2140                         $diff_class = " incomplete";
2141                 }
2142         }
2143         $line = untabify($line);
2144         if ($from && $to && $line =~ m/^\@{2} /) {
2145                 my ($from_text, $from_start, $from_lines, $to_text, $to_start, $to_lines, $section) =
2146                         $line =~ m/^\@{2} (-(\d+)(?:,(\d+))?) (\+(\d+)(?:,(\d+))?) \@{2}(.*)$/;
2147
2148                 $from_lines = 0 unless defined $from_lines;
2149                 $to_lines   = 0 unless defined $to_lines;
2150
2151                 if ($from->{'href'}) {
2152                         $from_text = $cgi->a({-href=>"$from->{'href'}#l$from_start",
2153                                              -class=>"list"}, $from_text);
2154                 }
2155                 if ($to->{'href'}) {
2156                         $to_text   = $cgi->a({-href=>"$to->{'href'}#l$to_start",
2157                                              -class=>"list"}, $to_text);
2158                 }
2159                 $line = "<span class=\"chunk_info\">@@ $from_text $to_text @@</span>" .
2160                         "<span class=\"section\">" . esc_html($section, -nbsp=>1) . "</span>";
2161                 return "<div class=\"diff$diff_class\">$line</div>\n";
2162         } elsif ($from && $to && $line =~ m/^\@{3}/) {
2163                 my ($prefix, $ranges, $section) = $line =~ m/^(\@+) (.*?) \@+(.*)$/;
2164                 my (@from_text, @from_start, @from_nlines, $to_text, $to_start, $to_nlines);
2165
2166                 @from_text = split(' ', $ranges);
2167                 for (my $i = 0; $i < @from_text; ++$i) {
2168                         ($from_start[$i], $from_nlines[$i]) =
2169                                 (split(',', substr($from_text[$i], 1)), 0);
2170                 }
2171
2172                 $to_text   = pop @from_text;
2173                 $to_start  = pop @from_start;
2174                 $to_nlines = pop @from_nlines;
2175
2176                 $line = "<span class=\"chunk_info\">$prefix ";
2177                 for (my $i = 0; $i < @from_text; ++$i) {
2178                         if ($from->{'href'}[$i]) {
2179                                 $line .= $cgi->a({-href=>"$from->{'href'}[$i]#l$from_start[$i]",
2180                                                   -class=>"list"}, $from_text[$i]);
2181                         } else {
2182                                 $line .= $from_text[$i];
2183                         }
2184                         $line .= " ";
2185                 }
2186                 if ($to->{'href'}) {
2187                         $line .= $cgi->a({-href=>"$to->{'href'}#l$to_start",
2188                                           -class=>"list"}, $to_text);
2189                 } else {
2190                         $line .= $to_text;
2191                 }
2192                 $line .= " $prefix</span>" .
2193                          "<span class=\"section\">" . esc_html($section, -nbsp=>1) . "</span>";
2194                 return "<div class=\"diff$diff_class\">$line</div>\n";
2195         }
2196         return "<div class=\"diff$diff_class\">" . esc_html($line, -nbsp=>1) . "</div>\n";
2197 }
2198
2199 # Generates undef or something like "_snapshot_" or "snapshot (_tbz2_ _zip_)",
2200 # linked.  Pass the hash of the tree/commit to snapshot.
2201 sub format_snapshot_links {
2202         my ($hash) = @_;
2203         my $num_fmts = @snapshot_fmts;
2204         if ($num_fmts > 1) {
2205                 # A parenthesized list of links bearing format names.
2206                 # e.g. "snapshot (_tar.gz_ _zip_)"
2207                 return "snapshot (" . join(' ', map
2208                         $cgi->a({
2209                                 -href => href(
2210                                         action=>"snapshot",
2211                                         hash=>$hash,
2212                                         snapshot_format=>$_
2213                                 )
2214                         }, $known_snapshot_formats{$_}{'display'})
2215                 , @snapshot_fmts) . ")";
2216         } elsif ($num_fmts == 1) {
2217                 # A single "snapshot" link whose tooltip bears the format name.
2218                 # i.e. "_snapshot_"
2219                 my ($fmt) = @snapshot_fmts;
2220                 return
2221                         $cgi->a({
2222                                 -href => href(
2223                                         action=>"snapshot",
2224                                         hash=>$hash,
2225                                         snapshot_format=>$fmt
2226                                 ),
2227                                 -title => "in format: $known_snapshot_formats{$fmt}{'display'}"
2228                         }, "snapshot");
2229         } else { # $num_fmts == 0
2230                 return undef;
2231         }
2232 }
2233
2234 ## ......................................................................
2235 ## functions returning values to be passed, perhaps after some
2236 ## transformation, to other functions; e.g. returning arguments to href()
2237
2238 # returns hash to be passed to href to generate gitweb URL
2239 # in -title key it returns description of link
2240 sub get_feed_info {
2241         my $format = shift || 'Atom';
2242         my %res = (action => lc($format));
2243
2244         # feed links are possible only for project views
2245         return unless (defined $project);
2246         # some views should link to OPML, or to generic project feed,
2247         # or don't have specific feed yet (so they should use generic)
2248         return if ($action =~ /^(?:tags|heads|forks|tag|search)$/x);
2249
2250         my $branch;
2251         # branches refs uses 'refs/heads/' prefix (fullname) to differentiate
2252         # from tag links; this also makes possible to detect branch links
2253         if ((defined $hash_base && $hash_base =~ m!^refs/heads/(.*)$!) ||
2254             (defined $hash      && $hash      =~ m!^refs/heads/(.*)$!)) {
2255                 $branch = $1;
2256         }
2257         # find log type for feed description (title)
2258         my $type = 'log';
2259         if (defined $file_name) {
2260                 $type  = "history of $file_name";
2261                 $type .= "/" if ($action eq 'tree');
2262                 $type .= " on '$branch'" if (defined $branch);
2263         } else {
2264                 $type = "log of $branch" if (defined $branch);
2265         }
2266
2267         $res{-title} = $type;
2268         $res{'hash'} = (defined $branch ? "refs/heads/$branch" : undef);
2269         $res{'file_name'} = $file_name;
2270
2271         return %res;
2272 }
2273
2274 ## ----------------------------------------------------------------------
2275 ## git utility subroutines, invoking git commands
2276
2277 # returns path to the core git executable and the --git-dir parameter as list
2278 sub git_cmd {
2279         $number_of_git_cmds++;
2280         return $GIT, '--git-dir='.$git_dir;
2281 }
2282
2283 # quote the given arguments for passing them to the shell
2284 # quote_command("command", "arg 1", "arg with ' and ! characters")
2285 # => "'command' 'arg 1' 'arg with '\'' and '\!' characters'"
2286 # Try to avoid using this function wherever possible.
2287 sub quote_command {
2288         return join(' ',
2289                 map { my $a = $_; $a =~ s/(['!])/'\\$1'/g; "'$a'" } @_ );
2290 }
2291
2292 # get HEAD ref of given project as hash
2293 sub git_get_head_hash {
2294         return git_get_full_hash(shift, 'HEAD');
2295 }
2296
2297 sub git_get_full_hash {
2298         return git_get_hash(@_);
2299 }
2300
2301 sub git_get_short_hash {
2302         return git_get_hash(@_, '--short=7');
2303 }
2304
2305 sub git_get_hash {
2306         my ($project, $hash, @options) = @_;
2307         my $o_git_dir = $git_dir;
2308         my $retval = undef;
2309         $git_dir = "$projectroot/$project";
2310         if (open my $fd, '-|', git_cmd(), 'rev-parse',
2311             '--verify', '-q', @options, $hash) {
2312                 $retval = <$fd>;
2313                 chomp $retval if defined $retval;
2314                 close $fd;
2315         }
2316         if (defined $o_git_dir) {
2317                 $git_dir = $o_git_dir;
2318         }
2319         return $retval;
2320 }
2321
2322 # get type of given object
2323 sub git_get_type {
2324         my $hash = shift;
2325
2326         open my $fd, "-|", git_cmd(), "cat-file", '-t', $hash or return;
2327         my $type = <$fd>;
2328         close $fd or return;
2329         chomp $type;
2330         return $type;
2331 }
2332
2333 # repository configuration
2334 our $config_file = '';
2335 our %config;
2336
2337 # store multiple values for single key as anonymous array reference
2338 # single values stored directly in the hash, not as [ <value> ]
2339 sub hash_set_multi {
2340         my ($hash, $key, $value) = @_;
2341
2342         if (!exists $hash->{$key}) {
2343                 $hash->{$key} = $value;
2344         } elsif (!ref $hash->{$key}) {
2345                 $hash->{$key} = [ $hash->{$key}, $value ];
2346         } else {
2347                 push @{$hash->{$key}}, $value;
2348         }
2349 }
2350
2351 # return hash of git project configuration
2352 # optionally limited to some section, e.g. 'gitweb'
2353 sub git_parse_project_config {
2354         my $section_regexp = shift;
2355         my %config;
2356
2357         local $/ = "\0";
2358
2359         open my $fh, "-|", git_cmd(), "config", '-z', '-l',
2360                 or return;
2361
2362         while (my $keyval = <$fh>) {
2363                 chomp $keyval;
2364                 my ($key, $value) = split(/\n/, $keyval, 2);
2365
2366                 hash_set_multi(\%config, $key, $value)
2367                         if (!defined $section_regexp || $key =~ /^(?:$section_regexp)\./o);
2368         }
2369         close $fh;
2370
2371         return %config;
2372 }
2373
2374 # convert config value to boolean: 'true' or 'false'
2375 # no value, number > 0, 'true' and 'yes' values are true
2376 # rest of values are treated as false (never as error)
2377 sub config_to_bool {
2378         my $val = shift;
2379
2380         return 1 if !defined $val;             # section.key
2381
2382         # strip leading and trailing whitespace
2383         $val =~ s/^\s+//;
2384         $val =~ s/\s+$//;
2385
2386         return (($val =~ /^\d+$/ && $val) ||   # section.key = 1
2387                 ($val =~ /^(?:true|yes)$/i));  # section.key = true
2388 }
2389
2390 # convert config value to simple decimal number
2391 # an optional value suffix of 'k', 'm', or 'g' will cause the value
2392 # to be multiplied by 1024, 1048576, or 1073741824
2393 sub config_to_int {
2394         my $val = shift;
2395
2396         # strip leading and trailing whitespace
2397         $val =~ s/^\s+//;
2398         $val =~ s/\s+$//;
2399
2400         if (my ($num, $unit) = ($val =~ /^([0-9]*)([kmg])$/i)) {
2401                 $unit = lc($unit);
2402                 # unknown unit is treated as 1
2403                 return $num * ($unit eq 'g' ? 1073741824 :
2404                                $unit eq 'm' ?    1048576 :
2405                                $unit eq 'k' ?       1024 : 1);
2406         }
2407         return $val;
2408 }
2409
2410 # convert config value to array reference, if needed
2411 sub config_to_multi {
2412         my $val = shift;
2413
2414         return ref($val) ? $val : (defined($val) ? [ $val ] : []);
2415 }
2416
2417 sub git_get_project_config {
2418         my ($key, $type) = @_;
2419
2420         return unless defined $git_dir;
2421
2422         # key sanity check
2423         return unless ($key);
2424         $key =~ s/^gitweb\.//;
2425         return if ($key =~ m/\W/);
2426
2427         # type sanity check
2428         if (defined $type) {
2429                 $type =~ s/^--//;
2430                 $type = undef
2431                         unless ($type eq 'bool' || $type eq 'int');
2432         }
2433
2434         # get config
2435         if (!defined $config_file ||
2436             $config_file ne "$git_dir/config") {
2437                 %config = git_parse_project_config('gitweb');
2438                 $config_file = "$git_dir/config";
2439         }
2440
2441         # check if config variable (key) exists
2442         return unless exists $config{"gitweb.$key"};
2443
2444         # ensure given type
2445         if (!defined $type) {
2446                 return $config{"gitweb.$key"};
2447         } elsif ($type eq 'bool') {
2448                 # backward compatibility: 'git config --bool' returns true/false
2449                 return config_to_bool($config{"gitweb.$key"}) ? 'true' : 'false';
2450         } elsif ($type eq 'int') {
2451                 return config_to_int($config{"gitweb.$key"});
2452         }
2453         return $config{"gitweb.$key"};
2454 }
2455
2456 # get hash of given path at given ref
2457 sub git_get_hash_by_path {
2458         my $base = shift;
2459         my $path = shift || return undef;
2460         my $type = shift;
2461
2462         $path =~ s,/+$,,;
2463
2464         open my $fd, "-|", git_cmd(), "ls-tree", $base, "--", $path
2465                 or die_error(500, "Open git-ls-tree failed");
2466         my $line = <$fd>;
2467         close $fd or return undef;
2468
2469         if (!defined $line) {
2470                 # there is no tree or hash given by $path at $base
2471                 return undef;
2472         }
2473
2474         #'100644 blob 0fa3f3a66fb6a137f6ec2c19351ed4d807070ffa  panic.c'
2475         $line =~ m/^([0-9]+) (.+) ([0-9a-fA-F]{40})\t/;
2476         if (defined $type && $type ne $2) {
2477                 # type doesn't match
2478                 return undef;
2479         }
2480         return $3;
2481 }
2482
2483 # get path of entry with given hash at given tree-ish (ref)
2484 # used to get 'from' filename for combined diff (merge commit) for renames
2485 sub git_get_path_by_hash {
2486         my $base = shift || return;
2487         my $hash = shift || return;
2488
2489         local $/ = "\0";
2490
2491         open my $fd, "-|", git_cmd(), "ls-tree", '-r', '-t', '-z', $base
2492                 or return undef;
2493         while (my $line = <$fd>) {
2494                 chomp $line;
2495
2496                 #'040000 tree 595596a6a9117ddba9fe379b6b012b558bac8423  gitweb'
2497                 #'100644 blob e02e90f0429be0d2a69b76571101f20b8f75530f  gitweb/README'
2498                 if ($line =~ m/(?:[0-9]+) (?:.+) $hash\t(.+)$/) {
2499                         close $fd;
2500                         return $1;
2501                 }
2502         }
2503         close $fd;
2504         return undef;
2505 }
2506
2507 ## ......................................................................
2508 ## git utility functions, directly accessing git repository
2509
2510 sub git_get_project_description {
2511         my $path = shift;
2512
2513         $git_dir = "$projectroot/$path";
2514         open my $fd, '<', "$git_dir/description"
2515                 or return git_get_project_config('description');
2516         my $descr = <$fd>;
2517         close $fd;
2518         if (defined $descr) {
2519                 chomp $descr;
2520         }
2521         return $descr;
2522 }
2523
2524 sub git_get_project_ctags {
2525         my $path = shift;
2526         my $ctags = {};
2527
2528         $git_dir = "$projectroot/$path";
2529         opendir my $dh, "$git_dir/ctags"
2530                 or return $ctags;
2531         foreach (grep { -f $_ } map { "$git_dir/ctags/$_" } readdir($dh)) {
2532                 open my $ct, '<', $_ or next;
2533                 my $val = <$ct>;
2534                 chomp $val;
2535                 close $ct;
2536                 my $ctag = $_; $ctag =~ s#.*/##;
2537                 $ctags->{$ctag} = $val;
2538         }
2539         closedir $dh;
2540         $ctags;
2541 }
2542
2543 sub git_populate_project_tagcloud {
2544         my $ctags = shift;
2545
2546         # First, merge different-cased tags; tags vote on casing
2547         my %ctags_lc;
2548         foreach (keys %$ctags) {
2549                 $ctags_lc{lc $_}->{count} += $ctags->{$_};
2550                 if (not $ctags_lc{lc $_}->{topcount}
2551                     or $ctags_lc{lc $_}->{topcount} < $ctags->{$_}) {
2552                         $ctags_lc{lc $_}->{topcount} = $ctags->{$_};
2553                         $ctags_lc{lc $_}->{topname} = $_;
2554                 }
2555         }
2556
2557         my $cloud;
2558         if (eval { require HTML::TagCloud; 1; }) {
2559                 $cloud = HTML::TagCloud->new;
2560                 foreach (sort keys %ctags_lc) {
2561                         # Pad the title with spaces so that the cloud looks
2562                         # less crammed.
2563                         my $title = $ctags_lc{$_}->{topname};
2564                         $title =~ s/ /&nbsp;/g;
2565                         $title =~ s/^/&nbsp;/g;
2566                         $title =~ s/$/&nbsp;/g;
2567                         $cloud->add($title, $home_link."?by_tag=".$_, $ctags_lc{$_}->{count});
2568                 }
2569         } else {
2570                 $cloud = \%ctags_lc;
2571         }
2572         $cloud;
2573 }
2574
2575 sub git_show_project_tagcloud {
2576         my ($cloud, $count) = @_;
2577         print STDERR ref($cloud)."..\n";
2578         if (ref $cloud eq 'HTML::TagCloud') {
2579                 return $cloud->html_and_css($count);
2580         } else {
2581                 my @tags = sort { $cloud->{$a}->{count} <=> $cloud->{$b}->{count} } keys %$cloud;
2582                 return '<p align="center">' . join (', ', map {
2583                         "<a href=\"$home_link?by_tag=$_\">$cloud->{$_}->{topname}</a>"
2584                 } splice(@tags, 0, $count)) . '</p>';
2585         }
2586 }
2587
2588 sub git_get_project_url_list {
2589         my $path = shift;
2590
2591         $git_dir = "$projectroot/$path";
2592         open my $fd, '<', "$git_dir/cloneurl"
2593                 or return wantarray ?
2594                 @{ config_to_multi(git_get_project_config('url')) } :
2595                    config_to_multi(git_get_project_config('url'));
2596         my @git_project_url_list = map { chomp; $_ } <$fd>;
2597         close $fd;
2598
2599         return wantarray ? @git_project_url_list : \@git_project_url_list;
2600 }
2601
2602 sub git_get_projects_list {
2603         my ($filter) = @_;
2604         my @list;
2605
2606         $filter ||= '';
2607         $filter =~ s/\.git$//;
2608
2609         my $check_forks = gitweb_check_feature('forks');
2610
2611         if (-d $projects_list) {
2612                 # search in directory
2613                 my $dir = $projects_list . ($filter ? "/$filter" : '');
2614                 # remove the trailing "/"
2615                 $dir =~ s!/+$!!;
2616                 my $pfxlen = length("$dir");
2617                 my $pfxdepth = ($dir =~ tr!/!!);
2618
2619                 File::Find::find({
2620                         follow_fast => 1, # follow symbolic links
2621                         follow_skip => 2, # ignore duplicates
2622                         dangling_symlinks => 0, # ignore dangling symlinks, silently
2623                         wanted => sub {
2624                                 # global variables
2625                                 our $project_maxdepth;
2626                                 our $projectroot;
2627                                 # skip project-list toplevel, if we get it.
2628                                 return if (m!^[/.]$!);
2629                                 # only directories can be git repositories
2630                                 return unless (-d $_);
2631                                 # don't traverse too deep (Find is super slow on os x)
2632                                 if (($File::Find::name =~ tr!/!!) - $pfxdepth > $project_maxdepth) {
2633                                         $File::Find::prune = 1;
2634                                         return;
2635                                 }
2636
2637                                 my $subdir = substr($File::Find::name, $pfxlen + 1);
2638                                 # we check related file in $projectroot
2639                                 my $path = ($filter ? "$filter/" : '') . $subdir;
2640                                 if (check_export_ok("$projectroot/$path")) {
2641                                         push @list, { path => $path };
2642                                         $File::Find::prune = 1;
2643                                 }
2644                         },
2645                 }, "$dir");
2646
2647         } elsif (-f $projects_list) {
2648                 # read from file(url-encoded):
2649                 # 'git%2Fgit.git Linus+Torvalds'
2650                 # 'libs%2Fklibc%2Fklibc.git H.+Peter+Anvin'
2651                 # 'linux%2Fhotplug%2Fudev.git Greg+Kroah-Hartman'
2652                 my %paths;
2653                 open my $fd, '<', $projects_list or return;
2654         PROJECT:
2655                 while (my $line = <$fd>) {
2656                         chomp $line;
2657                         my ($path, $owner) = split ' ', $line;
2658                         $path = unescape($path);
2659                         $owner = unescape($owner);
2660                         if (!defined $path) {
2661                                 next;
2662                         }
2663                         if ($filter ne '') {
2664                                 # looking for forks;
2665                                 my $pfx = substr($path, 0, length($filter));
2666                                 if ($pfx ne $filter) {
2667                                         next PROJECT;
2668                                 }
2669                                 my $sfx = substr($path, length($filter));
2670                                 if ($sfx !~ /^\/.*\.git$/) {
2671                                         next PROJECT;
2672                                 }
2673                         } elsif ($check_forks) {
2674                         PATH:
2675                                 foreach my $filter (keys %paths) {
2676                                         # looking for forks;
2677                                         my $pfx = substr($path, 0, length($filter));
2678                                         if ($pfx ne $filter) {
2679                                                 next PATH;
2680                                         }
2681                                         my $sfx = substr($path, length($filter));
2682                                         if ($sfx !~ /^\/.*\.git$/) {
2683                                                 next PATH;
2684                                         }
2685                                         # is a fork, don't include it in
2686                                         # the list
2687                                         next PROJECT;
2688                                 }
2689                         }
2690                         if (check_export_ok("$projectroot/$path")) {
2691                                 my $pr = {
2692                                         path => $path,
2693                                         owner => to_utf8($owner),
2694                                 };
2695                                 push @list, $pr;
2696                                 (my $forks_path = $path) =~ s/\.git$//;
2697                                 $paths{$forks_path}++;
2698                         }
2699                 }
2700                 close $fd;
2701         }
2702         return @list;
2703 }
2704
2705 our $gitweb_project_owner = undef;
2706 sub git_get_project_list_from_file {
2707
2708         return if (defined $gitweb_project_owner);
2709
2710         $gitweb_project_owner = {};
2711         # read from file (url-encoded):
2712         # 'git%2Fgit.git Linus+Torvalds'
2713         # 'libs%2Fklibc%2Fklibc.git H.+Peter+Anvin'
2714         # 'linux%2Fhotplug%2Fudev.git Greg+Kroah-Hartman'
2715         if (-f $projects_list) {
2716                 open(my $fd, '<', $projects_list);
2717                 while (my $line = <$fd>) {
2718                         chomp $line;
2719                         my ($pr, $ow) = split ' ', $line;
2720                         $pr = unescape($pr);
2721                         $ow = unescape($ow);
2722                         $gitweb_project_owner->{$pr} = to_utf8($ow);
2723                 }
2724                 close $fd;
2725         }
2726 }
2727
2728 sub git_get_project_owner {
2729         my $project = shift;
2730         my $owner;
2731
2732         return undef unless $project;
2733         $git_dir = "$projectroot/$project";
2734
2735         if (!defined $gitweb_project_owner) {
2736                 git_get_project_list_from_file();
2737         }
2738
2739         if (exists $gitweb_project_owner->{$project}) {
2740                 $owner = $gitweb_project_owner->{$project};
2741         }
2742         if (!defined $owner){
2743                 $owner = git_get_project_config('owner');
2744         }
2745         if (!defined $owner) {
2746                 $owner = get_file_owner("$git_dir");
2747         }
2748
2749         return $owner;
2750 }
2751
2752 sub git_get_last_activity {
2753         my ($path) = @_;
2754         my $fd;
2755
2756         $git_dir = "$projectroot/$path";
2757         open($fd, "-|", git_cmd(), 'for-each-ref',
2758              '--format=%(committer)',
2759              '--sort=-committerdate',
2760              '--count=1',
2761              'refs/heads') or return;
2762         my $most_recent = <$fd>;
2763         close $fd or return;
2764         if (defined $most_recent &&
2765             $most_recent =~ / (\d+) [-+][01]\d\d\d$/) {
2766                 my $timestamp = $1;
2767                 my $age = time - $timestamp;
2768                 return ($age, age_string($age));
2769         }
2770         return (undef, undef);
2771 }
2772
2773 sub git_get_references {
2774         my $type = shift || "";
2775         my %refs;
2776         # 5dc01c595e6c6ec9ccda4f6f69c131c0dd945f8c refs/tags/v2.6.11
2777         # c39ae07f393806ccf406ef966e9a15afc43cc36a refs/tags/v2.6.11^{}
2778         open my $fd, "-|", git_cmd(), "show-ref", "--dereference",
2779                 ($type ? ("--", "refs/$type") : ()) # use -- <pattern> if $type
2780                 or return;
2781
2782         while (my $line = <$fd>) {
2783                 chomp $line;
2784                 if ($line =~ m!^([0-9a-fA-F]{40})\srefs/($type.*)$!) {
2785                         if (defined $refs{$1}) {
2786                                 push @{$refs{$1}}, $2;
2787                         } else {
2788                                 $refs{$1} = [ $2 ];
2789                         }
2790                 }
2791         }
2792         close $fd or return;
2793         return \%refs;
2794 }
2795
2796 sub git_get_rev_name_tags {
2797         my $hash = shift || return undef;
2798
2799         open my $fd, "-|", git_cmd(), "name-rev", "--tags", $hash
2800                 or return;
2801         my $name_rev = <$fd>;
2802         close $fd;
2803
2804         if ($name_rev =~ m|^$hash tags/(.*)$|) {
2805                 return $1;
2806         } else {
2807                 # catches also '$hash undefined' output
2808                 return undef;
2809         }
2810 }
2811
2812 ## ----------------------------------------------------------------------
2813 ## parse to hash functions
2814
2815 sub parse_date {
2816         my $epoch = shift;
2817         my $tz = shift || "-0000";
2818
2819         my %date;
2820         my @months = ("Jan", "Feb", "Mar", "Apr", "May", "Jun", "Jul", "Aug", "Sep", "Oct", "Nov", "Dec");
2821         my @days = ("Sun", "Mon", "Tue", "Wed", "Thu", "Fri", "Sat");
2822         my ($sec, $min, $hour, $mday, $mon, $year, $wday, $yday) = gmtime($epoch);
2823         $date{'hour'} = $hour;
2824         $date{'minute'} = $min;
2825         $date{'mday'} = $mday;
2826         $date{'day'} = $days[$wday];
2827         $date{'month'} = $months[$mon];
2828         $date{'rfc2822'}   = sprintf "%s, %d %s %4d %02d:%02d:%02d +0000",
2829                              $days[$wday], $mday, $months[$mon], 1900+$year, $hour ,$min, $sec;
2830         $date{'mday-time'} = sprintf "%d %s %02d:%02d",
2831                              $mday, $months[$mon], $hour ,$min;
2832         $date{'iso-8601'}  = sprintf "%04d-%02d-%02dT%02d:%02d:%02dZ",
2833                              1900+$year, 1+$mon, $mday, $hour ,$min, $sec;
2834
2835         $tz =~ m/^([+\-][0-9][0-9])([0-9][0-9])$/;
2836         my $local = $epoch + ((int $1 + ($2/60)) * 3600);
2837         ($sec, $min, $hour, $mday, $mon, $year, $wday, $yday) = gmtime($local);
2838         $date{'hour_local'} = $hour;
2839         $date{'minute_local'} = $min;
2840         $date{'tz_local'} = $tz;
2841         $date{'iso-tz'} = sprintf("%04d-%02d-%02d %02d:%02d:%02d %s",
2842                                   1900+$year, $mon+1, $mday,
2843                                   $hour, $min, $sec, $tz);
2844         return %date;
2845 }
2846
2847 sub parse_tag {
2848         my $tag_id = shift;
2849         my %tag;
2850         my @comment;
2851
2852         open my $fd, "-|", git_cmd(), "cat-file", "tag", $tag_id or return;
2853         $tag{'id'} = $tag_id;
2854         while (my $line = <$fd>) {
2855                 chomp $line;
2856                 if ($line =~ m/^object ([0-9a-fA-F]{40})$/) {
2857                         $tag{'object'} = $1;
2858                 } elsif ($line =~ m/^type (.+)$/) {
2859                         $tag{'type'} = $1;
2860                 } elsif ($line =~ m/^tag (.+)$/) {
2861                         $tag{'name'} = $1;
2862                 } elsif ($line =~ m/^tagger (.*) ([0-9]+) (.*)$/) {
2863                         $tag{'author'} = $1;
2864                         $tag{'author_epoch'} = $2;
2865                         $tag{'author_tz'} = $3;
2866                         if ($tag{'author'} =~ m/^([^<]+) <([^>]*)>/) {
2867                                 $tag{'author_name'}  = $1;
2868                                 $tag{'author_email'} = $2;
2869                         } else {
2870                                 $tag{'author_name'} = $tag{'author'};
2871                         }
2872                 } elsif ($line =~ m/--BEGIN/) {
2873                         push @comment, $line;
2874                         last;
2875                 } elsif ($line eq "") {
2876                         last;
2877                 }
2878         }
2879         push @comment, <$fd>;
2880         $tag{'comment'} = \@comment;
2881         close $fd or return;
2882         if (!defined $tag{'name'}) {
2883                 return
2884         };
2885         return %tag
2886 }
2887
2888 sub parse_commit_text {
2889         my ($commit_text, $withparents) = @_;
2890         my @commit_lines = split '\n', $commit_text;
2891         my %co;
2892
2893         pop @commit_lines; # Remove '\0'
2894
2895         if (! @commit_lines) {
2896                 return;
2897         }
2898
2899         my $header = shift @commit_lines;
2900         if ($header !~ m/^[0-9a-fA-F]{40}/) {
2901                 return;
2902         }
2903         ($co{'id'}, my @parents) = split ' ', $header;
2904         while (my $line = shift @commit_lines) {
2905                 last if $line eq "\n";
2906                 if ($line =~ m/^tree ([0-9a-fA-F]{40})$/) {
2907                         $co{'tree'} = $1;
2908                 } elsif ((!defined $withparents) && ($line =~ m/^parent ([0-9a-fA-F]{40})$/)) {
2909                         push @parents, $1;
2910                 } elsif ($line =~ m/^author (.*) ([0-9]+) (.*)$/) {
2911                         $co{'author'} = to_utf8($1);
2912                         $co{'author_epoch'} = $2;
2913                         $co{'author_tz'} = $3;
2914                         if ($co{'author'} =~ m/^([^<]+) <([^>]*)>/) {
2915                                 $co{'author_name'}  = $1;
2916                                 $co{'author_email'} = $2;
2917                         } else {
2918                                 $co{'author_name'} = $co{'author'};
2919                         }
2920                 } elsif ($line =~ m/^committer (.*) ([0-9]+) (.*)$/) {
2921                         $co{'committer'} = to_utf8($1);
2922                         $co{'committer_epoch'} = $2;
2923                         $co{'committer_tz'} = $3;
2924                         if ($co{'committer'} =~ m/^([^<]+) <([^>]*)>/) {
2925                                 $co{'committer_name'}  = $1;
2926                                 $co{'committer_email'} = $2;
2927                         } else {
2928                                 $co{'committer_name'} = $co{'committer'};
2929                         }
2930                 }
2931         }
2932         if (!defined $co{'tree'}) {
2933                 return;
2934         };
2935         $co{'parents'} = \@parents;
2936         $co{'parent'} = $parents[0];
2937
2938         foreach my $title (@commit_lines) {
2939                 $title =~ s/^    //;
2940                 if ($title ne "") {
2941                         $co{'title'} = chop_str($title, 80, 5);
2942                         # remove leading stuff of merges to make the interesting part visible
2943                         if (length($title) > 50) {
2944                                 $title =~ s/^Automatic //;
2945                                 $title =~ s/^merge (of|with) /Merge ... /i;
2946                                 if (length($title) > 50) {
2947                                         $title =~ s/(http|rsync):\/\///;
2948                                 }
2949                                 if (length($title) > 50) {
2950                                         $title =~ s/(master|www|rsync)\.//;
2951                                 }
2952                                 if (length($title) > 50) {
2953                                         $title =~ s/kernel.org:?//;
2954                                 }
2955                                 if (length($title) > 50) {
2956                                         $title =~ s/\/pub\/scm//;
2957                                 }
2958                         }
2959                         $co{'title_short'} = chop_str($title, 50, 5);
2960                         last;
2961                 }
2962         }
2963         if (! defined $co{'title'} || $co{'title'} eq "") {
2964                 $co{'title'} = $co{'title_short'} = '(no commit message)';
2965         }
2966         # remove added spaces
2967         foreach my $line (@commit_lines) {
2968                 $line =~ s/^    //;
2969         }
2970         $co{'comment'} = \@commit_lines;
2971
2972         my $age = time - $co{'committer_epoch'};
2973         $co{'age'} = $age;
2974         $co{'age_string'} = age_string($age);
2975         my ($sec, $min, $hour, $mday, $mon, $year, $wday, $yday) = gmtime($co{'committer_epoch'});
2976         if ($age > 60*60*24*7*2) {
2977                 $co{'age_string_date'} = sprintf "%4i-%02u-%02i", 1900 + $year, $mon+1, $mday;
2978                 $co{'age_string_age'} = $co{'age_string'};
2979         } else {
2980                 $co{'age_string_date'} = $co{'age_string'};
2981                 $co{'age_string_age'} = sprintf "%4i-%02u-%02i", 1900 + $year, $mon+1, $mday;
2982         }
2983         return %co;
2984 }
2985
2986 sub parse_commit {
2987         my ($commit_id) = @_;
2988         my %co;
2989
2990         local $/ = "\0";
2991
2992         open my $fd, "-|", git_cmd(), "rev-list",
2993                 "--parents",
2994                 "--header",
2995                 "--max-count=1",
2996                 $commit_id,
2997                 "--",
2998                 or die_error(500, "Open git-rev-list failed");
2999         %co = parse_commit_text(<$fd>, 1);
3000         close $fd;
3001
3002         return %co;
3003 }
3004
3005 sub parse_commits {
3006         my ($commit_id, $maxcount, $skip, $filename, @args) = @_;
3007         my @cos;
3008
3009         $maxcount ||= 1;
3010         $skip ||= 0;
3011
3012         local $/ = "\0";
3013
3014         open my $fd, "-|", git_cmd(), "rev-list",
3015                 "--header",
3016                 @args,
3017                 ("--max-count=" . $maxcount),
3018                 ("--skip=" . $skip),
3019                 @extra_options,
3020                 $commit_id,
3021                 "--",
3022                 ($filename ? ($filename) : ())
3023                 or die_error(500, "Open git-rev-list failed");
3024         while (my $line = <$fd>) {
3025                 my %co = parse_commit_text($line);
3026                 push @cos, \%co;
3027         }
3028         close $fd;
3029
3030         return wantarray ? @cos : \@cos;
3031 }
3032
3033 # parse line of git-diff-tree "raw" output
3034 sub parse_difftree_raw_line {
3035         my $line = shift;
3036         my %res;
3037
3038         # ':100644 100644 03b218260e99b78c6df0ed378e59ed9205ccc96d 3b93d5e7cc7f7dd4ebed13a5cc1a4ad976fc94d8 M   ls-files.c'
3039         # ':100644 100644 7f9281985086971d3877aca27704f2aaf9c448ce bc190ebc71bbd923f2b728e505408f5e54bd073a M   rev-tree.c'
3040         if ($line =~ m/^:([0-7]{6}) ([0-7]{6}) ([0-9a-fA-F]{40}) ([0-9a-fA-F]{40}) (.)([0-9]{0,3})\t(.*)$/) {
3041                 $res{'from_mode'} = $1;
3042                 $res{'to_mode'} = $2;
3043                 $res{'from_id'} = $3;
3044                 $res{'to_id'} = $4;
3045                 $res{'status'} = $5;
3046                 $res{'similarity'} = $6;
3047                 if ($res{'status'} eq 'R' || $res{'status'} eq 'C') { # renamed or copied
3048                         ($res{'from_file'}, $res{'to_file'}) = map { unquote($_) } split("\t", $7);
3049                 } else {
3050                         $res{'from_file'} = $res{'to_file'} = $res{'file'} = unquote($7);
3051                 }
3052         }
3053         # '::100755 100755 100755 60e79ca1b01bc8b057abe17ddab484699a7f5fdb 94067cc5f73388f33722d52ae02f44692bc07490 94067cc5f73388f33722d52ae02f44692bc07490 MR git-gui/git-gui.sh'
3054         # combined diff (for merge commit)
3055         elsif ($line =~ s/^(::+)((?:[0-7]{6} )+)((?:[0-9a-fA-F]{40} )+)([a-zA-Z]+)\t(.*)$//) {
3056                 $res{'nparents'}  = length($1);
3057                 $res{'from_mode'} = [ split(' ', $2) ];
3058                 $res{'to_mode'} = pop @{$res{'from_mode'}};
3059                 $res{'from_id'} = [ split(' ', $3) ];
3060                 $res{'to_id'} = pop @{$res{'from_id'}};
3061                 $res{'status'} = [ split('', $4) ];
3062                 $res{'to_file'} = unquote($5);
3063         }
3064         # 'c512b523472485aef4fff9e57b229d9d243c967f'
3065         elsif ($line =~ m/^([0-9a-fA-F]{40})$/) {
3066                 $res{'commit'} = $1;
3067         }
3068
3069         return wantarray ? %res : \%res;
3070 }
3071
3072 # wrapper: return parsed line of git-diff-tree "raw" output
3073 # (the argument might be raw line, or parsed info)
3074 sub parsed_difftree_line {
3075         my $line_or_ref = shift;
3076
3077         if (ref($line_or_ref) eq "HASH") {
3078                 # pre-parsed (or generated by hand)
3079                 return $line_or_ref;
3080         } else {
3081                 return parse_difftree_raw_line($line_or_ref);
3082         }
3083 }
3084
3085 # parse line of git-ls-tree output
3086 sub parse_ls_tree_line {
3087         my $line = shift;
3088         my %opts = @_;
3089         my %res;
3090
3091         if ($opts{'-l'}) {
3092                 #'100644 blob 0fa3f3a66fb6a137f6ec2c19351ed4d807070ffa   16717  panic.c'
3093                 $line =~ m/^([0-9]+) (.+) ([0-9a-fA-F]{40}) +(-|[0-9]+)\t(.+)$/s;
3094
3095                 $res{'mode'} = $1;
3096                 $res{'type'} = $2;
3097                 $res{'hash'} = $3;
3098                 $res{'size'} = $4;
3099                 if ($opts{'-z'}) {
3100                         $res{'name'} = $5;
3101                 } else {
3102                         $res{'name'} = unquote($5);
3103                 }
3104         } else {
3105                 #'100644 blob 0fa3f3a66fb6a137f6ec2c19351ed4d807070ffa  panic.c'
3106                 $line =~ m/^([0-9]+) (.+) ([0-9a-fA-F]{40})\t(.+)$/s;
3107
3108                 $res{'mode'} = $1;
3109                 $res{'type'} = $2;
3110                 $res{'hash'} = $3;
3111                 if ($opts{'-z'}) {
3112                         $res{'name'} = $4;
3113                 } else {
3114                         $res{'name'} = unquote($4);
3115                 }
3116         }
3117
3118         return wantarray ? %res : \%res;
3119 }
3120
3121 # generates _two_ hashes, references to which are passed as 2 and 3 argument
3122 sub parse_from_to_diffinfo {
3123         my ($diffinfo, $from, $to, @parents) = @_;
3124
3125         if ($diffinfo->{'nparents'}) {
3126                 # combined diff
3127                 $from->{'file'} = [];
3128                 $from->{'href'} = [];
3129                 fill_from_file_info($diffinfo, @parents)
3130                         unless exists $diffinfo->{'from_file'};
3131                 for (my $i = 0; $i < $diffinfo->{'nparents'}; $i++) {
3132                         $from->{'file'}[$i] =
3133                                 defined $diffinfo->{'from_file'}[$i] ?
3134                                         $diffinfo->{'from_file'}[$i] :
3135                                         $diffinfo->{'to_file'};
3136                         if ($diffinfo->{'status'}[$i] ne "A") { # not new (added) file
3137                                 $from->{'href'}[$i] = href(action=>"blob",
3138                                                            hash_base=>$parents[$i],
3139                                                            hash=>$diffinfo->{'from_id'}[$i],
3140                                                            file_name=>$from->{'file'}[$i]);
3141                         } else {
3142                                 $from->{'href'}[$i] = undef;
3143                         }
3144                 }
3145         } else {
3146                 # ordinary (not combined) diff
3147                 $from->{'file'} = $diffinfo->{'from_file'};
3148                 if ($diffinfo->{'status'} ne "A") { # not new (added) file
3149                         $from->{'href'} = href(action=>"blob", hash_base=>$hash_parent,
3150                                                hash=>$diffinfo->{'from_id'},
3151                                                file_name=>$from->{'file'});
3152                 } else {
3153                         delete $from->{'href'};
3154                 }
3155         }
3156
3157         $to->{'file'} = $diffinfo->{'to_file'};
3158         if (!is_deleted($diffinfo)) { # file exists in result
3159                 $to->{'href'} = href(action=>"blob", hash_base=>$hash,
3160                                      hash=>$diffinfo->{'to_id'},
3161                                      file_name=>$to->{'file'});
3162         } else {
3163                 delete $to->{'href'};
3164         }
3165 }
3166
3167 ## ......................................................................
3168 ## parse to array of hashes functions
3169
3170 sub git_get_heads_list {
3171         my ($limit, @classes) = @_;
3172         unless (@classes) {
3173                 my $remote_heads = gitweb_check_feature('remote_heads');
3174                 @classes = ('heads', $remote_heads ? 'remotes' : ());
3175         }
3176         my @patterns = map { "refs/$_" } @classes;
3177         my @headslist;
3178
3179         open my $fd, '-|', git_cmd(), 'for-each-ref',
3180                 ($limit ? '--count='.($limit+1) : ()), '--sort=-committerdate',
3181                 '--format=%(objectname) %(refname) %(subject)%00%(committer)',
3182                 @patterns
3183                 or return;
3184         while (my $line = <$fd>) {
3185                 my %ref_item;
3186
3187                 chomp $line;
3188                 my ($refinfo, $committerinfo) = split(/\0/, $line);
3189                 my ($hash, $name, $title) = split(' ', $refinfo, 3);
3190                 my ($committer, $epoch, $tz) =
3191                         ($committerinfo =~ /^(.*) ([0-9]+) (.*)$/);
3192                 $ref_item{'fullname'}  = $name;
3193                 $name =~ s!^refs/(?:head|remote)s/!!;
3194
3195                 $ref_item{'name'}  = $name;
3196                 $ref_item{'id'}    = $hash;
3197                 $ref_item{'title'} = $title || '(no commit message)';
3198                 $ref_item{'epoch'} = $epoch;
3199                 if ($epoch) {
3200                         $ref_item{'age'} = age_string(time - $ref_item{'epoch'});
3201                 } else {
3202                         $ref_item{'age'} = "unknown";
3203                 }
3204
3205                 push @headslist, \%ref_item;
3206         }
3207         close $fd;
3208
3209         return wantarray ? @headslist : \@headslist;
3210 }
3211
3212 sub git_get_tags_list {
3213         my $limit = shift;
3214         my @tagslist;
3215
3216         open my $fd, '-|', git_cmd(), 'for-each-ref',
3217                 ($limit ? '--count='.($limit+1) : ()), '--sort=-creatordate',
3218                 '--format=%(objectname) %(objecttype) %(refname) '.
3219                 '%(*objectname) %(*objecttype) %(subject)%00%(creator)',
3220                 'refs/tags'
3221                 or return;
3222         while (my $line = <$fd>) {
3223                 my %ref_item;
3224
3225                 chomp $line;
3226                 my ($refinfo, $creatorinfo) = split(/\0/, $line);
3227                 my ($id, $type, $name, $refid, $reftype, $title) = split(' ', $refinfo, 6);
3228                 my ($creator, $epoch, $tz) =
3229                         ($creatorinfo =~ /^(.*) ([0-9]+) (.*)$/);
3230                 $ref_item{'fullname'} = $name;
3231                 $name =~ s!^refs/tags/!!;
3232
3233                 $ref_item{'type'} = $type;
3234                 $ref_item{'id'} = $id;
3235                 $ref_item{'name'} = $name;
3236                 if ($type eq "tag") {
3237                         $ref_item{'subject'} = $title;
3238                         $ref_item{'reftype'} = $reftype;
3239                         $ref_item{'refid'}   = $refid;
3240                 } else {
3241                         $ref_item{'reftype'} = $type;
3242                         $ref_item{'refid'}   = $id;
3243                 }
3244
3245                 if ($type eq "tag" || $type eq "commit") {
3246                         $ref_item{'epoch'} = $epoch;
3247                         if ($epoch) {
3248                                 $ref_item{'age'} = age_string(time - $ref_item{'epoch'});
3249                         } else {
3250                                 $ref_item{'age'} = "unknown";
3251                         }
3252                 }
3253
3254                 push @tagslist, \%ref_item;
3255         }
3256         close $fd;
3257
3258         return wantarray ? @tagslist : \@tagslist;
3259 }
3260
3261 ## ----------------------------------------------------------------------
3262 ## filesystem-related functions
3263
3264 sub get_file_owner {
3265         my $path = shift;
3266
3267         my ($dev, $ino, $mode, $nlink, $st_uid, $st_gid, $rdev, $size) = stat($path);
3268         my ($name, $passwd, $uid, $gid, $quota, $comment, $gcos, $dir, $shell) = getpwuid($st_uid);
3269         if (!defined $gcos) {
3270                 return undef;
3271         }
3272         my $owner = $gcos;
3273         $owner =~ s/[,;].*$//;
3274         return to_utf8($owner);
3275 }
3276
3277 # assume that file exists
3278 sub insert_file {
3279         my $filename = shift;
3280
3281         open my $fd, '<', $filename;
3282         print map { to_utf8($_) } <$fd>;
3283         close $fd;
3284 }
3285
3286 ## ......................................................................
3287 ## mimetype related functions
3288
3289 sub mimetype_guess_file {
3290         my $filename = shift;
3291         my $mimemap = shift;
3292         -r $mimemap or return undef;
3293
3294         my %mimemap;
3295         open(my $mh, '<', $mimemap) or return undef;
3296         while (<$mh>) {
3297                 next if m/^#/; # skip comments
3298                 my ($mimetype, $exts) = split(/\t+/);
3299                 if (defined $exts) {
3300                         my @exts = split(/\s+/, $exts);
3301                         foreach my $ext (@exts) {
3302                                 $mimemap{$ext} = $mimetype;
3303                         }
3304                 }
3305         }
3306         close($mh);
3307
3308         $filename =~ /\.([^.]*)$/;
3309         return $mimemap{$1};
3310 }
3311
3312 sub mimetype_guess {
3313         my $filename = shift;
3314         my $mime;
3315         $filename =~ /\./ or return undef;
3316
3317         if ($mimetypes_file) {
3318                 my $file = $mimetypes_file;
3319                 if ($file !~ m!^/!) { # if it is relative path
3320                         # it is relative to project
3321                         $file = "$projectroot/$project/$file";
3322                 }
3323                 $mime = mimetype_guess_file($filename, $file);
3324         }
3325         $mime ||= mimetype_guess_file($filename, '/etc/mime.types');
3326         return $mime;
3327 }
3328
3329 sub blob_mimetype {
3330         my $fd = shift;
3331         my $filename = shift;
3332
3333         if ($filename) {
3334                 my $mime = mimetype_guess($filename);
3335                 $mime and return $mime;
3336         }
3337
3338         # just in case
3339         return $default_blob_plain_mimetype unless $fd;
3340
3341         if (-T $fd) {
3342                 return 'text/plain';
3343         } elsif (! $filename) {
3344                 return 'application/octet-stream';
3345         } elsif ($filename =~ m/\.png$/i) {
3346                 return 'image/png';
3347         } elsif ($filename =~ m/\.gif$/i) {
3348                 return 'image/gif';
3349         } elsif ($filename =~ m/\.jpe?g$/i) {
3350                 return 'image/jpeg';
3351         } else {
3352                 return 'application/octet-stream';
3353         }
3354 }
3355
3356 sub blob_contenttype {
3357         my ($fd, $file_name, $type) = @_;
3358
3359         $type ||= blob_mimetype($fd, $file_name);
3360         if ($type eq 'text/plain' && defined $default_text_plain_charset) {
3361                 $type .= "; charset=$default_text_plain_charset";
3362         }
3363
3364         return $type;
3365 }
3366
3367 # guess file syntax for syntax highlighting; return undef if no highlighting
3368 # the name of syntax can (in the future) depend on syntax highlighter used
3369 sub guess_file_syntax {
3370         my ($highlight, $mimetype, $file_name) = @_;
3371         return undef unless ($highlight && defined $file_name);
3372         my $basename = basename($file_name, '.in');
3373         return $highlight_basename{$basename}
3374                 if exists $highlight_basename{$basename};
3375
3376         $basename =~ /\.([^.]*)$/;
3377         my $ext = $1 or return undef;
3378         return $highlight_ext{$ext}
3379                 if exists $highlight_ext{$ext};
3380
3381         return undef;
3382 }
3383
3384 # run highlighter and return FD of its output,
3385 # or return original FD if no highlighting
3386 sub run_highlighter {
3387         my ($fd, $highlight, $syntax) = @_;
3388         return $fd unless ($highlight && defined $syntax);
3389
3390         close $fd
3391                 or die_error(404, "Reading blob failed");
3392         open $fd, quote_command(git_cmd(), "cat-file", "blob", $hash)." | ".
3393                   quote_command($highlight_bin).
3394                   " --xhtml --fragment --syntax $syntax |"
3395                 or die_error(500, "Couldn't open file or run syntax highlighter");
3396         return $fd;
3397 }
3398
3399 ## ======================================================================
3400 ## functions printing HTML: header, footer, error page
3401
3402 sub get_page_title {
3403         my $title = to_utf8($site_name);
3404
3405         return $title unless (defined $project);
3406         $title .= " - " . to_utf8($project);
3407
3408         return $title unless (defined $action);
3409         $title .= "/$action"; # $action is US-ASCII (7bit ASCII)
3410
3411         return $title unless (defined $file_name);
3412         $title .= " - " . esc_path($file_name);
3413         if ($action eq "tree" && $file_name !~ m|/$|) {
3414                 $title .= "/";
3415         }
3416
3417         return $title;
3418 }
3419
3420 sub git_header_html {
3421         my $status = shift || "200 OK";
3422         my $expires = shift;
3423         my %opts = @_;
3424
3425         my $title = get_page_title();
3426         my $content_type;
3427         # require explicit support from the UA if we are to send the page as
3428         # 'application/xhtml+xml', otherwise send it as plain old 'text/html'.
3429         # we have to do this because MSIE sometimes globs '*/*', pretending to
3430         # support xhtml+xml but choking when it gets what it asked for.
3431         if (defined $cgi->http('HTTP_ACCEPT') &&
3432             $cgi->http('HTTP_ACCEPT') =~ m/(,|;|\s|^)application\/xhtml\+xml(,|;|\s|$)/ &&
3433             $cgi->Accept('application/xhtml+xml') != 0) {
3434                 $content_type = 'application/xhtml+xml';
3435         } else {
3436                 $content_type = 'text/html';
3437         }
3438         print $cgi->header(-type=>$content_type, -charset => 'utf-8',
3439                            -status=> $status, -expires => $expires)
3440                 unless ($opts{'-no_http_header'});
3441         my $mod_perl_version = $ENV{'MOD_PERL'} ? " $ENV{'MOD_PERL'}" : '';
3442         print <<EOF;
3443 <?xml version="1.0" encoding="utf-8"?>
3444 <!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Strict//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-strict.dtd">
3445 <html xmlns="http://www.w3.org/1999/xhtml" xml:lang="en-US" lang="en-US">
3446 <!-- git web interface version $version, (C) 2005-2006, Kay Sievers <kay.sievers\@vrfy.org>, Christian Gierke -->
3447 <!-- git core binaries version $git_version -->
3448 <head>
3449 <meta http-equiv="content-type" content="$content_type; charset=utf-8"/>
3450 <meta name="generator" content="gitweb/$version git/$git_version$mod_perl_version"/>
3451 <meta name="robots" content="index, nofollow"/>
3452 <title>$title</title>
3453 EOF
3454         # the stylesheet, favicon etc urls won't work correctly with path_info
3455         # unless we set the appropriate base URL
3456         if ($ENV{'PATH_INFO'}) {
3457                 print "<base href=\"".esc_url($base_url)."\" />\n";
3458         }
3459         # print out each stylesheet that exist, providing backwards capability
3460         # for those people who defined $stylesheet in a config file
3461         if (defined $stylesheet) {
3462                 print '<link rel="stylesheet" type="text/css" href="'.$stylesheet.'"/>'."\n";
3463         } else {
3464                 foreach my $stylesheet (@stylesheets) {
3465                         next unless $stylesheet;
3466                         print '<link rel="stylesheet" type="text/css" href="'.$stylesheet.'"/>'."\n";
3467                 }
3468         }
3469         if (defined $project) {
3470                 my %href_params = get_feed_info();
3471                 if (!exists $href_params{'-title'}) {
3472                         $href_params{'-title'} = 'log';
3473                 }
3474
3475                 foreach my $format qw(RSS Atom) {
3476                         my $type = lc($format);
3477                         my %link_attr = (
3478                                 '-rel' => 'alternate',
3479                                 '-title' => "$project - $href_params{'-title'} - $format feed",
3480                                 '-type' => "application/$type+xml"
3481                         );
3482
3483                         $href_params{'action'} = $type;
3484                         $link_attr{'-href'} = href(%href_params);
3485                         print "<link ".
3486                               "rel=\"$link_attr{'-rel'}\" ".
3487                               "title=\"$link_attr{'-title'}\" ".
3488                               "href=\"$link_attr{'-href'}\" ".
3489                               "type=\"$link_attr{'-type'}\" ".
3490                               "/>\n";
3491
3492                         $href_params{'extra_options'} = '--no-merges';
3493                         $link_attr{'-href'} = href(%href_params);
3494                         $link_attr{'-title'} .= ' (no merges)';
3495                         print "<link ".
3496                               "rel=\"$link_attr{'-rel'}\" ".
3497                               "title=\"$link_attr{'-title'}\" ".
3498                               "href=\"$link_attr{'-href'}\" ".
3499                               "type=\"$link_attr{'-type'}\" ".
3500                               "/>\n";
3501                 }
3502
3503         } else {
3504                 printf('<link rel="alternate" title="%s projects list" '.
3505                        'href="%s" type="text/plain; charset=utf-8" />'."\n",
3506                        $site_name, href(project=>undef, action=>"project_index"));
3507                 printf('<link rel="alternate" title="%s projects feeds" '.
3508                        'href="%s" type="text/x-opml" />'."\n",
3509                        $site_name, href(project=>undef, action=>"opml"));
3510         }
3511         if (defined $favicon) {
3512                 print qq(<link rel="shortcut icon" href="$favicon" type="image/png" />\n);
3513         }
3514
3515         print "</head>\n" .
3516               "<body>\n";
3517
3518         if (defined $site_header && -f $site_header) {
3519                 insert_file($site_header);
3520         }
3521
3522         print "<div class=\"page_header\">\n" .
3523               $cgi->a({-href => esc_url($logo_url),
3524                        -title => $logo_label},
3525                       qq(<img src="$logo" width="72" height="27" alt="git" class="logo"/>));
3526         print $cgi->a({-href => esc_url($home_link)}, $home_link_str) . " / ";
3527         if (defined $project) {
3528                 print $cgi->a({-href => href(action=>"summary")}, esc_html($project));
3529                 if (defined $action) {
3530                         print " / $action";
3531                 }
3532                 print "\n";
3533         }
3534         print "</div>\n";
3535
3536         my $have_search = gitweb_check_feature('search');
3537         if (defined $project && $have_search) {
3538                 if (!defined $searchtext) {
3539                         $searchtext = "";
3540                 }
3541                 my $search_hash;
3542                 if (defined $hash_base) {
3543                         $search_hash = $hash_base;
3544                 } elsif (defined $hash) {
3545                         $search_hash = $hash;
3546                 } else {
3547                         $search_hash = "HEAD";
3548                 }
3549                 my $action = $my_uri;
3550                 my $use_pathinfo = gitweb_check_feature('pathinfo');
3551                 if ($use_pathinfo) {
3552                         $action .= "/".esc_url($project);
3553                 }
3554                 print $cgi->startform(-method => "get", -action => $action) .
3555                       "<div class=\"search\">\n" .
3556                       (!$use_pathinfo &&
3557                       $cgi->input({-name=>"p", -value=>$project, -type=>"hidden"}) . "\n") .
3558                       $cgi->input({-name=>"a", -value=>"search", -type=>"hidden"}) . "\n" .
3559                       $cgi->input({-name=>"h", -value=>$search_hash, -type=>"hidden"}) . "\n" .
3560                       $cgi->popup_menu(-name => 'st', -default => 'commit',
3561                                        -values => ['commit', 'grep', 'author', 'committer', 'pickaxe']) .
3562                       $cgi->sup($cgi->a({-href => href(action=>"search_help")}, "?")) .
3563                       " search:\n",
3564                       $cgi->textfield(-name => "s", -value => $searchtext) . "\n" .
3565                       "<span title=\"Extended regular expression\">" .
3566                       $cgi->checkbox(-name => 'sr', -value => 1, -label => 're',
3567                                      -checked => $search_use_regexp) .
3568                       "</span>" .
3569                       "</div>" .
3570                       $cgi->end_form() . "\n";
3571         }
3572 }
3573
3574 sub git_footer_html {
3575         my $feed_class = 'rss_logo';
3576
3577         print "<div class=\"page_footer\">\n";
3578         if (defined $project) {
3579                 my $descr = git_get_project_description($project);
3580                 if (defined $descr) {
3581                         print "<div class=\"page_footer_text\">" . esc_html($descr) . "</div>\n";
3582                 }
3583
3584                 my %href_params = get_feed_info();
3585                 if (!%href_params) {
3586                         $feed_class .= ' generic';
3587                 }
3588                 $href_params{'-title'} ||= 'log';
3589
3590                 foreach my $format qw(RSS Atom) {
3591                         $href_params{'action'} = lc($format);
3592                         print $cgi->a({-href => href(%href_params),
3593                                       -title => "$href_params{'-title'} $format feed",
3594                                       -class => $feed_class}, $format)."\n";
3595                 }
3596
3597         } else {
3598                 print $cgi->a({-href => href(project=>undef, action=>"opml"),
3599                               -class => $feed_class}, "OPML") . " ";
3600                 print $cgi->a({-href => href(project=>undef, action=>"project_index"),
3601                               -class => $feed_class}, "TXT") . "\n";
3602         }
3603         print "</div>\n"; # class="page_footer"
3604
3605         if (defined $t0 && gitweb_check_feature('timed')) {
3606                 print "<div id=\"generating_info\">\n";
3607                 print 'This page took '.
3608                       '<span id="generating_time" class="time_span">'.
3609                       tv_interval($t0, [ gettimeofday() ]).
3610                       ' seconds </span>'.
3611                       ' and '.
3612                       '<span id="generating_cmd">'.
3613                       $number_of_git_cmds.
3614                       '</span> git commands '.
3615                       " to generate.\n";
3616                 print "</div>\n"; # class="page_footer"
3617         }
3618
3619         if (defined $site_footer && -f $site_footer) {
3620                 insert_file($site_footer);
3621         }
3622
3623         print qq!<script type="text/javascript" src="$javascript"></script>\n!;
3624         if (defined $action &&
3625             $action eq 'blame_incremental') {
3626                 print qq!<script type="text/javascript">\n!.
3627                       qq!startBlame("!. href(action=>"blame_data", -replay=>1) .qq!",\n!.
3628                       qq!           "!. href() .qq!");\n!.
3629                       qq!</script>\n!;
3630         } elsif (gitweb_check_feature('javascript-actions')) {
3631                 print qq!<script type="text/javascript">\n!.
3632                       qq!window.onload = fixLinks;\n!.
3633                       qq!</script>\n!;
3634         }
3635
3636         print "</body>\n" .
3637               "</html>";
3638 }
3639
3640 # die_error(<http_status_code>, <error_message>[, <detailed_html_description>])
3641 # Example: die_error(404, 'Hash not found')
3642 # By convention, use the following status codes (as defined in RFC 2616):
3643 # 400: Invalid or missing CGI parameters, or
3644 #      requested object exists but has wrong type.
3645 # 403: Requested feature (like "pickaxe" or "snapshot") not enabled on
3646 #      this server or project.
3647 # 404: Requested object/revision/project doesn't exist.
3648 # 500: The server isn't configured properly, or
3649 #      an internal error occurred (e.g. failed assertions caused by bugs), or
3650 #      an unknown error occurred (e.g. the git binary died unexpectedly).
3651 # 503: The server is currently unavailable (because it is overloaded,
3652 #      or down for maintenance).  Generally, this is a temporary state.
3653 sub die_error {
3654         my $status = shift || 500;
3655         my $error = esc_html(shift) || "Internal Server Error";
3656         my $extra = shift;
3657         my %opts = @_;
3658
3659         my %http_responses = (
3660                 400 => '400 Bad Request',
3661                 403 => '403 Forbidden',
3662                 404 => '404 Not Found',
3663                 500 => '500 Internal Server Error',
3664                 503 => '503 Service Unavailable',
3665         );
3666         git_header_html($http_responses{$status}, undef, %opts);
3667         print <<EOF;
3668 <div class="page_body">
3669 <br /><br />
3670 $status - $error
3671 <br />
3672 EOF
3673         if (defined $extra) {
3674                 print "<hr />\n" .
3675                       "$extra\n";
3676         }
3677         print "</div>\n";
3678
3679         git_footer_html();
3680         goto DONE_GITWEB
3681                 unless ($opts{'-error_handler'});
3682 }
3683
3684 ## ----------------------------------------------------------------------
3685 ## functions printing or outputting HTML: navigation
3686
3687 sub git_print_page_nav {
3688         my ($current, $suppress, $head, $treehead, $treebase, $extra) = @_;
3689         $extra = '' if !defined $extra; # pager or formats
3690
3691         my @navs = qw(summary shortlog log commit commitdiff tree);
3692         if ($suppress) {
3693                 @navs = grep { $_ ne $suppress } @navs;
3694         }
3695
3696         my %arg = map { $_ => {action=>$_} } @navs;
3697         if (defined $head) {
3698                 for (qw(commit commitdiff)) {
3699                         $arg{$_}{'hash'} = $head;
3700                 }
3701                 if ($current =~ m/^(tree | log | shortlog | commit | commitdiff | search)$/x) {
3702                         for (qw(shortlog log)) {
3703                                 $arg{$_}{'hash'} = $head;
3704                         }
3705                 }
3706         }
3707
3708         $arg{'tree'}{'hash'} = $treehead if defined $treehead;
3709         $arg{'tree'}{'hash_base'} = $treebase if defined $treebase;
3710
3711         my @actions = gitweb_get_feature('actions');
3712         my %repl = (
3713                 '%' => '%',
3714                 'n' => $project,         # project name
3715                 'f' => $git_dir,         # project path within filesystem
3716                 'h' => $treehead || '',  # current hash ('h' parameter)
3717                 'b' => $treebase || '',  # hash base ('hb' parameter)
3718         );
3719         while (@actions) {
3720                 my ($label, $link, $pos) = splice(@actions,0,3);
3721                 # insert
3722                 @navs = map { $_ eq $pos ? ($_, $label) : $_ } @navs;
3723                 # munch munch
3724                 $link =~ s/%([%nfhb])/$repl{$1}/g;
3725                 $arg{$label}{'_href'} = $link;
3726         }
3727
3728         print "<div class=\"page_nav\">\n" .
3729                 (join " | ",
3730                  map { $_ eq $current ?
3731                        $_ : $cgi->a({-href => ($arg{$_}{_href} ? $arg{$_}{_href} : href(%{$arg{$_}}))}, "$_")
3732                  } @navs);
3733         print "<br/>\n$extra<br/>\n" .
3734               "</div>\n";
3735 }
3736
3737 sub format_paging_nav {
3738         my ($action, $page, $has_next_link) = @_;
3739         my $paging_nav;
3740
3741
3742         if ($page > 0) {
3743                 $paging_nav .=
3744                         $cgi->a({-href => href(-replay=>1, page=>undef)}, "first") .
3745                         " &sdot; " .
3746                         $cgi->a({-href => href(-replay=>1, page=>$page-1),
3747                                  -accesskey => "p", -title => "Alt-p"}, "prev");
3748         } else {
3749                 $paging_nav .= "first &sdot; prev";
3750         }
3751
3752         if ($has_next_link) {
3753                 $paging_nav .= " &sdot; " .
3754                         $cgi->a({-href => href(-replay=>1, page=>$page+1),
3755                                  -accesskey => "n", -title => "Alt-n"}, "next");
3756         } else {
3757                 $paging_nav .= " &sdot; next";
3758         }
3759
3760         return $paging_nav;
3761 }
3762
3763 ## ......................................................................
3764 ## functions printing or outputting HTML: div
3765
3766 sub git_print_header_div {
3767         my ($action, $title, $hash, $hash_base) = @_;
3768         my %args = ();
3769
3770         $args{'action'} = $action;
3771         $args{'hash'} = $hash if $hash;
3772         $args{'hash_base'} = $hash_base if $hash_base;
3773
3774         print "<div class=\"header\">\n" .
3775               $cgi->a({-href => href(%args), -class => "title"},
3776               $title ? $title : $action) .
3777               "\n</div>\n";
3778 }
3779
3780 sub print_local_time {
3781         print format_local_time(@_);
3782 }
3783
3784 sub format_local_time {
3785         my $localtime = '';
3786         my %date = @_;
3787         if ($date{'hour_local'} < 6) {
3788                 $localtime .= sprintf(" (<span class=\"atnight\">%02d:%02d</span> %s)",
3789                         $date{'hour_local'}, $date{'minute_local'}, $date{'tz_local'});
3790         } else {
3791                 $localtime .= sprintf(" (%02d:%02d %s)",
3792                         $date{'hour_local'}, $date{'minute_local'}, $date{'tz_local'});
3793         }
3794
3795         return $localtime;
3796 }
3797
3798 # Outputs the author name and date in long form
3799 sub git_print_authorship {
3800         my $co = shift;
3801         my %opts = @_;
3802         my $tag = $opts{-tag} || 'div';
3803         my $author = $co->{'author_name'};
3804
3805         my %ad = parse_date($co->{'author_epoch'}, $co->{'author_tz'});
3806         print "<$tag class=\"author_date\">" .
3807               format_search_author($author, "author", esc_html($author)) .
3808               " [$ad{'rfc2822'}";
3809         print_local_time(%ad) if ($opts{-localtime});
3810         print "]" . git_get_avatar($co->{'author_email'}, -pad_before => 1)
3811                   . "</$tag>\n";
3812 }
3813
3814 # Outputs table rows containing the full author or committer information,
3815 # in the format expected for 'commit' view (& similar).
3816 # Parameters are a commit hash reference, followed by the list of people
3817 # to output information for. If the list is empty it defaults to both
3818 # author and committer.
3819 sub git_print_authorship_rows {
3820         my $co = shift;
3821         # too bad we can't use @people = @_ || ('author', 'committer')
3822         my @people = @_;
3823         @people = ('author', 'committer') unless @people;
3824         foreach my $who (@people) {
3825                 my %wd = parse_date($co->{"${who}_epoch"}, $co->{"${who}_tz"});
3826                 print "<tr><td>$who</td><td>" .
3827                       format_search_author($co->{"${who}_name"}, $who,
3828                                esc_html($co->{"${who}_name"})) . " " .
3829                       format_search_author($co->{"${who}_email"}, $who,
3830                                esc_html("<" . $co->{"${who}_email"} . ">")) .
3831                       "</td><td rowspan=\"2\">" .
3832                       git_get_avatar($co->{"${who}_email"}, -size => 'double') .
3833                       "</td></tr>\n" .
3834                       "<tr>" .
3835                       "<td></td><td> $wd{'rfc2822'}";
3836                 print_local_time(%wd);
3837                 print "</td>" .
3838                       "</tr>\n";
3839         }
3840 }
3841
3842 sub git_print_page_path {
3843         my $name = shift;
3844         my $type = shift;
3845         my $hb = shift;
3846
3847
3848         print "<div class=\"page_path\">";
3849         print $cgi->a({-href => href(action=>"tree", hash_base=>$hb),
3850                       -title => 'tree root'}, to_utf8("[$project]"));
3851         print " / ";
3852         if (defined $name) {
3853                 my @dirname = split '/', $name;
3854                 my $basename = pop @dirname;
3855                 my $fullname = '';
3856
3857                 foreach my $dir (@dirname) {
3858                         $fullname .= ($fullname ? '/' : '') . $dir;
3859                         print $cgi->a({-href => href(action=>"tree", file_name=>$fullname,
3860                                                      hash_base=>$hb),
3861                                       -title => $fullname}, esc_path($dir));
3862                         print " / ";
3863                 }
3864                 if (defined $type && $type eq 'blob') {
3865                         print $cgi->a({-href => href(action=>"blob_plain", file_name=>$file_name,
3866                                                      hash_base=>$hb),
3867                                       -title => $name}, esc_path($basename));
3868                 } elsif (defined $type && $type eq 'tree') {
3869                         print $cgi->a({-href => href(action=>"tree", file_name=>$file_name,
3870                                                      hash_base=>$hb),
3871                                       -title => $name}, esc_path($basename));
3872                         print " / ";
3873                 } else {
3874                         print esc_path($basename);
3875                 }
3876         }
3877         print "<br/></div>\n";
3878 }
3879
3880 sub git_print_log {
3881         my $log = shift;
3882         my %opts = @_;
3883
3884         if ($opts{'-remove_title'}) {
3885                 # remove title, i.e. first line of log
3886                 shift @$log;
3887         }
3888         # remove leading empty lines
3889         while (defined $log->[0] && $log->[0] eq "") {
3890                 shift @$log;
3891         }
3892
3893         # print log
3894         my $signoff = 0;
3895         my $empty = 0;
3896         foreach my $line (@$log) {
3897                 if ($line =~ m/^ *(signed[ \-]off[ \-]by[ :]|acked[ \-]by[ :]|cc[ :])/i) {
3898                         $signoff = 1;
3899                         $empty = 0;
3900                         if (! $opts{'-remove_signoff'}) {
3901                                 print "<span class=\"signoff\">" . esc_html($line) . "</span><br/>\n";
3902                                 next;
3903                         } else {
3904                                 # remove signoff lines
3905                                 next;
3906                         }
3907                 } else {
3908                         $signoff = 0;
3909                 }
3910
3911                 # print only one empty line
3912                 # do not print empty line after signoff
3913                 if ($line eq "") {
3914                         next if ($empty || $signoff);
3915                         $empty = 1;
3916                 } else {
3917                         $empty = 0;
3918                 }
3919
3920                 print format_log_line_html($line) . "<br/>\n";
3921         }
3922
3923         if ($opts{'-final_empty_line'}) {
3924                 # end with single empty line
3925                 print "<br/>\n" unless $empty;
3926         }
3927 }
3928
3929 # return link target (what link points to)
3930 sub git_get_link_target {
3931         my $hash = shift;
3932         my $link_target;
3933
3934         # read link
3935         open my $fd, "-|", git_cmd(), "cat-file", "blob", $hash
3936                 or return;
3937         {
3938                 local $/ = undef;
3939                 $link_target = <$fd>;
3940         }
3941         close $fd
3942                 or return;
3943
3944         return $link_target;
3945 }
3946
3947 # given link target, and the directory (basedir) the link is in,
3948 # return target of link relative to top directory (top tree);
3949 # return undef if it is not possible (including absolute links).
3950 sub normalize_link_target {
3951         my ($link_target, $basedir) = @_;
3952
3953         # absolute symlinks (beginning with '/') cannot be normalized
3954         return if (substr($link_target, 0, 1) eq '/');
3955
3956         # normalize link target to path from top (root) tree (dir)
3957         my $path;
3958         if ($basedir) {
3959                 $path = $basedir . '/' . $link_target;
3960         } else {
3961                 # we are in top (root) tree (dir)
3962                 $path = $link_target;
3963         }
3964
3965         # remove //, /./, and /../
3966         my @path_parts;
3967         foreach my $part (split('/', $path)) {
3968                 # discard '.' and ''
3969                 next if (!$part || $part eq '.');
3970                 # handle '..'
3971                 if ($part eq '..') {
3972                         if (@path_parts) {
3973                                 pop @path_parts;
3974                         } else {
3975                                 # link leads outside repository (outside top dir)
3976                                 return;
3977                         }
3978                 } else {
3979                         push @path_parts, $part;
3980                 }
3981         }
3982         $path = join('/', @path_parts);
3983
3984         return $path;
3985 }
3986
3987 # print tree entry (row of git_tree), but without encompassing <tr> element
3988 sub git_print_tree_entry {
3989         my ($t, $basedir, $hash_base, $have_blame) = @_;
3990
3991         my %base_key = ();
3992         $base_key{'hash_base'} = $hash_base if defined $hash_base;
3993
3994         # The format of a table row is: mode list link.  Where mode is
3995         # the mode of the entry, list is the name of the entry, an href,
3996         # and link is the action links of the entry.
3997
3998         print "<td class=\"mode\">" . mode_str($t->{'mode'}) . "</td>\n";
3999         if (exists $t->{'size'}) {
4000                 print "<td class=\"size\">$t->{'size'}</td>\n";
4001         }
4002         if ($t->{'type'} eq "blob") {
4003                 print "<td class=\"list\">" .
4004                         $cgi->a({-href => href(action=>"blob", hash=>$t->{'hash'},
4005                                                file_name=>"$basedir$t->{'name'}", %base_key),
4006                                 -class => "list"}, esc_path($t->{'name'}));
4007                 if (S_ISLNK(oct $t->{'mode'})) {
4008                         my $link_target = git_get_link_target($t->{'hash'});
4009                         if ($link_target) {
4010                                 my $norm_target = normalize_link_target($link_target, $basedir);
4011                                 if (defined $norm_target) {
4012                                         print " -> " .
4013                                               $cgi->a({-href => href(action=>"object", hash_base=>$hash_base,
4014                                                                      file_name=>$norm_target),
4015                                                        -title => $norm_target}, esc_path($link_target));
4016                                 } else {
4017                                         print " -> " . esc_path($link_target);
4018                                 }
4019                         }
4020                 }
4021                 print "</td>\n";
4022                 print "<td class=\"link\">";
4023                 print $cgi->a({-href => href(action=>"blob", hash=>$t->{'hash'},
4024                                              file_name=>"$basedir$t->{'name'}", %base_key)},
4025                               "blob");
4026                 if ($have_blame) {
4027                         print " | " .
4028                               $cgi->a({-href => href(action=>"blame", hash=>$t->{'hash'},
4029                                                      file_name=>"$basedir$t->{'name'}", %base_key)},
4030                                       "blame");
4031                 }
4032                 if (defined $hash_base) {
4033                         print " | " .
4034                               $cgi->a({-href => href(action=>"history", hash_base=>$hash_base,
4035                                                      hash=>$t->{'hash'}, file_name=>"$basedir$t->{'name'}")},
4036                                       "history");
4037                 }
4038                 print " | " .
4039                         $cgi->a({-href => href(action=>"blob_plain", hash_base=>$hash_base,
4040                                                file_name=>"$basedir$t->{'name'}")},
4041                                 "raw");
4042                 print "</td>\n";
4043
4044         } elsif ($t->{'type'} eq "tree") {
4045                 print "<td class=\"list\">";
4046                 print $cgi->a({-href => href(action=>"tree", hash=>$t->{'hash'},
4047                                              file_name=>"$basedir$t->{'name'}",
4048                                              %base_key)},
4049                               esc_path($t->{'name'}));
4050                 print "</td>\n";
4051                 print "<td class=\"link\">";
4052                 print $cgi->a({-href => href(action=>"tree", hash=>$t->{'hash'},
4053                                              file_name=>"$basedir$t->{'name'}",
4054                                              %base_key)},
4055                               "tree");
4056                 if (defined $hash_base) {
4057                         print " | " .
4058                               $cgi->a({-href => href(action=>"history", hash_base=>$hash_base,
4059                                                      file_name=>"$basedir$t->{'name'}")},
4060                                       "history");
4061                 }
4062                 print "</td>\n";
4063         } else {
4064                 # unknown object: we can only present history for it
4065                 # (this includes 'commit' object, i.e. submodule support)
4066                 print "<td class=\"list\">" .
4067                       esc_path($t->{'name'}) .
4068                       "</td>\n";
4069                 print "<td class=\"link\">";
4070                 if (defined $hash_base) {
4071                         print $cgi->a({-href => href(action=>"history",
4072                                                      hash_base=>$hash_base,
4073                                                      file_name=>"$basedir$t->{'name'}")},
4074                                       "history");
4075                 }
4076                 print "</td>\n";
4077         }
4078 }
4079
4080 ## ......................................................................
4081 ## functions printing large fragments of HTML
4082
4083 # get pre-image filenames for merge (combined) diff
4084 sub fill_from_file_info {
4085         my ($diff, @parents) = @_;
4086
4087         $diff->{'from_file'} = [ ];
4088         $diff->{'from_file'}[$diff->{'nparents'} - 1] = undef;
4089         for (my $i = 0; $i < $diff->{'nparents'}; $i++) {
4090                 if ($diff->{'status'}[$i] eq 'R' ||
4091                     $diff->{'status'}[$i] eq 'C') {
4092                         $diff->{'from_file'}[$i] =
4093                                 git_get_path_by_hash($parents[$i], $diff->{'from_id'}[$i]);
4094                 }
4095         }
4096
4097         return $diff;
4098 }
4099
4100 # is current raw difftree line of file deletion
4101 sub is_deleted {
4102         my $diffinfo = shift;
4103
4104         return $diffinfo->{'to_id'} eq ('0' x 40);
4105 }
4106
4107 # does patch correspond to [previous] difftree raw line
4108 # $diffinfo  - hashref of parsed raw diff format
4109 # $patchinfo - hashref of parsed patch diff format
4110 #              (the same keys as in $diffinfo)
4111 sub is_patch_split {
4112         my ($diffinfo, $patchinfo) = @_;
4113
4114         return defined $diffinfo && defined $patchinfo
4115                 && $diffinfo->{'to_file'} eq $patchinfo->{'to_file'};
4116 }
4117
4118
4119 sub git_difftree_body {
4120         my ($difftree, $hash, @parents) = @_;
4121         my ($parent) = $parents[0];
4122         my $have_blame = gitweb_check_feature('blame');
4123         print "<div class=\"list_head\">\n";
4124         if ($#{$difftree} > 10) {
4125                 print(($#{$difftree} + 1) . " files changed:\n");
4126         }
4127         print "</div>\n";
4128
4129         print "<table class=\"" .
4130               (@parents > 1 ? "combined " : "") .
4131               "diff_tree\">\n";
4132
4133         # header only for combined diff in 'commitdiff' view
4134         my $has_header = @$difftree && @parents > 1 && $action eq 'commitdiff';
4135         if ($has_header) {
4136                 # table header
4137                 print "<thead><tr>\n" .
4138                        "<th></th><th></th>\n"; # filename, patchN link
4139                 for (my $i = 0; $i < @parents; $i++) {
4140                         my $par = $parents[$i];
4141                         print "<th>" .
4142                               $cgi->a({-href => href(action=>"commitdiff",
4143                                                      hash=>$hash, hash_parent=>$par),
4144                                        -title => 'commitdiff to parent number ' .
4145                                                   ($i+1) . ': ' . substr($par,0,7)},
4146                                       $i+1) .
4147                               "&nbsp;</th>\n";
4148                 }
4149                 print "</tr></thead>\n<tbody>\n";
4150         }
4151
4152         my $alternate = 1;
4153         my $patchno = 0;
4154         foreach my $line (@{$difftree}) {
4155                 my $diff = parsed_difftree_line($line);
4156
4157                 if ($alternate) {
4158                         print "<tr class=\"dark\">\n";
4159                 } else {
4160                         print "<tr class=\"light\">\n";
4161                 }
4162                 $alternate ^= 1;
4163
4164                 if (exists $diff->{'nparents'}) { # combined diff
4165
4166                         fill_from_file_info($diff, @parents)
4167                                 unless exists $diff->{'from_file'};
4168
4169                         if (!is_deleted($diff)) {
4170                                 # file exists in the result (child) commit
4171                                 print "<td>" .
4172                                       $cgi->a({-href => href(action=>"blob", hash=>$diff->{'to_id'},
4173                                                              file_name=>$diff->{'to_file'},
4174                                                              hash_base=>$hash),
4175                                               -class => "list"}, esc_path($diff->{'to_file'})) .
4176                                       "</td>\n";
4177                         } else {
4178                                 print "<td>" .
4179                                       esc_path($diff->{'to_file'}) .
4180                                       "</td>\n";
4181                         }
4182
4183                         if ($action eq 'commitdiff') {
4184                                 # link to patch
4185                                 $patchno++;
4186                                 print "<td class=\"link\">" .
4187                                       $cgi->a({-href => "#patch$patchno"}, "patch") .
4188                                       " | " .
4189                                       "</td>\n";
4190                         }
4191
4192                         my $has_history = 0;
4193                         my $not_deleted = 0;
4194                         for (my $i = 0; $i < $diff->{'nparents'}; $i++) {
4195                                 my $hash_parent = $parents[$i];
4196                                 my $from_hash = $diff->{'from_id'}[$i];
4197                                 my $from_path = $diff->{'from_file'}[$i];
4198                                 my $status = $diff->{'status'}[$i];
4199
4200                                 $has_history ||= ($status ne 'A');
4201                                 $not_deleted ||= ($status ne 'D');
4202
4203                                 if ($status eq 'A') {
4204                                         print "<td  class=\"link\" align=\"right\"> | </td>\n";
4205                                 } elsif ($status eq 'D') {
4206                                         print "<td class=\"link\">" .
4207                                               $cgi->a({-href => href(action=>"blob",
4208                                                                      hash_base=>$hash,
4209                                                                      hash=>$from_hash,
4210                                                                      file_name=>$from_path)},
4211                                                       "blob" . ($i+1)) .
4212                                               " | </td>\n";
4213                                 } else {
4214                                         if ($diff->{'to_id'} eq $from_hash) {
4215                                                 print "<td class=\"link nochange\">";
4216                                         } else {
4217                                                 print "<td class=\"link\">";
4218                                         }
4219                                         print $cgi->a({-href => href(action=>"blobdiff",
4220                                                                      hash=>$diff->{'to_id'},
4221                                                                      hash_parent=>$from_hash,
4222                                                                      hash_base=>$hash,
4223                                                                      hash_parent_base=>$hash_parent,
4224                                                                      file_name=>$diff->{'to_file'},
4225                                                                      file_parent=>$from_path)},
4226                                                       "diff" . ($i+1)) .
4227                                               " | </td>\n";
4228                                 }
4229                         }
4230
4231                         print "<td class=\"link\">";
4232                         if ($not_deleted) {
4233                                 print $cgi->a({-href => href(action=>"blob",
4234                                                              hash=>$diff->{'to_id'},
4235                                                              file_name=>$diff->{'to_file'},
4236                                                              hash_base=>$hash)},
4237                                               "blob");
4238                                 print " | " if ($has_history);
4239                         }
4240                         if ($has_history) {
4241                                 print $cgi->a({-href => href(action=>"history",
4242                                                              file_name=>$diff->{'to_file'},
4243                                                              hash_base=>$hash)},
4244                                               "history");
4245                         }
4246                         print "</td>\n";
4247
4248                         print "</tr>\n";
4249                         next; # instead of 'else' clause, to avoid extra indent
4250                 }
4251                 # else ordinary diff
4252
4253                 my ($to_mode_oct, $to_mode_str, $to_file_type);
4254                 my ($from_mode_oct, $from_mode_str, $from_file_type);
4255                 if ($diff->{'to_mode'} ne ('0' x 6)) {
4256                         $to_mode_oct = oct $diff->{'to_mode'};
4257                         if (S_ISREG($to_mode_oct)) { # only for regular file
4258                                 $to_mode_str = sprintf("%04o", $to_mode_oct & 0777); # permission bits
4259                         }
4260                         $to_file_type = file_type($diff->{'to_mode'});
4261                 }
4262                 if ($diff->{'from_mode'} ne ('0' x 6)) {
4263                         $from_mode_oct = oct $diff->{'from_mode'};
4264                         if (S_ISREG($to_mode_oct)) { # only for regular file
4265                                 $from_mode_str = sprintf("%04o", $from_mode_oct & 0777); # permission bits
4266                         }
4267                         $from_file_type = file_type($diff->{'from_mode'});
4268                 }
4269
4270                 if ($diff->{'status'} eq "A") { # created
4271                         my $mode_chng = "<span class=\"file_status new\">[new $to_file_type";
4272                         $mode_chng   .= " with mode: $to_mode_str" if $to_mode_str;
4273                         $mode_chng   .= "]</span>";
4274                         print "<td>";
4275                         print $cgi->a({-href => href(action=>"blob", hash=>$diff->{'to_id'},
4276                                                      hash_base=>$hash, file_name=>$diff->{'file'}),
4277                                       -class => "list"}, esc_path($diff->{'file'}));
4278                         print "</td>\n";
4279                         print "<td>$mode_chng</td>\n";
4280                         print "<td class=\"link\">";
4281                         if ($action eq 'commitdiff') {
4282                                 # link to patch
4283                                 $patchno++;
4284                                 print $cgi->a({-href => "#patch$patchno"}, "patch");
4285                                 print " | ";
4286                         }
4287                         print $cgi->a({-href => href(action=>"blob", hash=>$diff->{'to_id'},
4288                                                      hash_base=>$hash, file_name=>$diff->{'file'})},
4289                                       "blob");
4290                         print "</td>\n";
4291
4292                 } elsif ($diff->{'status'} eq "D") { # deleted
4293                         my $mode_chng = "<span class=\"file_status deleted\">[deleted $from_file_type]</span>";
4294                         print "<td>";
4295                         print $cgi->a({-href => href(action=>"blob", hash=>$diff->{'from_id'},
4296                                                      hash_base=>$parent, file_name=>$diff->{'file'}),
4297                                        -class => "list"}, esc_path($diff->{'file'}));
4298                         print "</td>\n";
4299                         print "<td>$mode_chng</td>\n";
4300                         print "<td class=\"link\">";
4301                         if ($action eq 'commitdiff') {
4302                                 # link to patch
4303                                 $patchno++;
4304                                 print $cgi->a({-href => "#patch$patchno"}, "patch");
4305                                 print " | ";
4306                         }
4307                         print $cgi->a({-href => href(action=>"blob", hash=>$diff->{'from_id'},
4308                                                      hash_base=>$parent, file_name=>$diff->{'file'})},
4309                                       "blob") . " | ";
4310                         if ($have_blame) {
4311                                 print $cgi->a({-href => href(action=>"blame", hash_base=>$parent,
4312                                                              file_name=>$diff->{'file'})},
4313                                               "blame") . " | ";
4314                         }
4315                         print $cgi->a({-href => href(action=>"history", hash_base=>$parent,
4316                                                      file_name=>$diff->{'file'})},
4317                                       "history");
4318                         print "</td>\n";
4319
4320                 } elsif ($diff->{'status'} eq "M" || $diff->{'status'} eq "T") { # modified, or type changed
4321                         my $mode_chnge = "";
4322                         if ($diff->{'from_mode'} != $diff->{'to_mode'}) {
4323                                 $mode_chnge = "<span class=\"file_status mode_chnge\">[changed";
4324                                 if ($from_file_type ne $to_file_type) {
4325                                         $mode_chnge .= " from $from_file_type to $to_file_type";
4326                                 }
4327                                 if (($from_mode_oct & 0777) != ($to_mode_oct & 0777)) {
4328                                         if ($from_mode_str && $to_mode_str) {
4329                                                 $mode_chnge .= " mode: $from_mode_str->$to_mode_str";
4330                                         } elsif ($to_mode_str) {
4331                                                 $mode_chnge .= " mode: $to_mode_str";
4332                                         }
4333                                 }
4334                                 $mode_chnge .= "]</span>\n";
4335                         }
4336                         print "<td>";
4337                         print $cgi->a({-href => href(action=>"blob", hash=>$diff->{'to_id'},
4338                                                      hash_base=>$hash, file_name=>$diff->{'file'}),
4339                                       -class => "list"}, esc_path($diff->{'file'}));
4340                         print "</td>\n";
4341                         print "<td>$mode_chnge</td>\n";
4342                         print "<td class=\"link\">";
4343                         if ($action eq 'commitdiff') {
4344                                 # link to patch
4345                                 $patchno++;
4346                                 print $cgi->a({-href => "#patch$patchno"}, "patch") .
4347                                       " | ";
4348                         } elsif ($diff->{'to_id'} ne $diff->{'from_id'}) {
4349                                 # "commit" view and modified file (not onlu mode changed)
4350                                 print $cgi->a({-href => href(action=>"blobdiff",
4351                                                              hash=>$diff->{'to_id'}, hash_parent=>$diff->{'from_id'},
4352                                                              hash_base=>$hash, hash_parent_base=>$parent,
4353                                                              file_name=>$diff->{'file'})},
4354                                               "diff") .
4355                                       " | ";
4356                         }
4357                         print $cgi->a({-href => href(action=>"blob", hash=>$diff->{'to_id'},
4358                                                      hash_base=>$hash, file_name=>$diff->{'file'})},
4359                                        "blob") . " | ";
4360                         if ($have_blame) {
4361                                 print $cgi->a({-href => href(action=>"blame", hash_base=>$hash,
4362                                                              file_name=>$diff->{'file'})},
4363                                               "blame") . " | ";
4364                         }
4365                         print $cgi->a({-href => href(action=>"history", hash_base=>$hash,
4366                                                      file_name=>$diff->{'file'})},
4367                                       "history");
4368                         print "</td>\n";
4369
4370                 } elsif ($diff->{'status'} eq "R" || $diff->{'status'} eq "C") { # renamed or copied
4371                         my %status_name = ('R' => 'moved', 'C' => 'copied');
4372                         my $nstatus = $status_name{$diff->{'status'}};
4373                         my $mode_chng = "";
4374                         if ($diff->{'from_mode'} != $diff->{'to_mode'}) {
4375                                 # mode also for directories, so we cannot use $to_mode_str
4376                                 $mode_chng = sprintf(", mode: %04o", $to_mode_oct & 0777);
4377                         }
4378                         print "<td>" .
4379                               $cgi->a({-href => href(action=>"blob", hash_base=>$hash,
4380                                                      hash=>$diff->{'to_id'}, file_name=>$diff->{'to_file'}),
4381                                       -class => "list"}, esc_path($diff->{'to_file'})) . "</td>\n" .
4382                               "<td><span class=\"file_status $nstatus\">[$nstatus from " .
4383                               $cgi->a({-href => href(action=>"blob", hash_base=>$parent,
4384                                                      hash=>$diff->{'from_id'}, file_name=>$diff->{'from_file'}),
4385                                       -class => "list"}, esc_path($diff->{'from_file'})) .
4386                               " with " . (int $diff->{'similarity'}) . "% similarity$mode_chng]</span></td>\n" .
4387                               "<td class=\"link\">";
4388                         if ($action eq 'commitdiff') {
4389                                 # link to patch
4390                                 $patchno++;
4391                                 print $cgi->a({-href => "#patch$patchno"}, "patch") .
4392                                       " | ";
4393                         } elsif ($diff->{'to_id'} ne $diff->{'from_id'}) {
4394                                 # "commit" view and modified file (not only pure rename or copy)
4395                                 print $cgi->a({-href => href(action=>"blobdiff",
4396                                                              hash=>$diff->{'to_id'}, hash_parent=>$diff->{'from_id'},
4397                                                              hash_base=>$hash, hash_parent_base=>$parent,
4398                                                              file_name=>$diff->{'to_file'}, file_parent=>$diff->{'from_file'})},
4399                                               "diff") .
4400                                       " | ";
4401                         }
4402                         print $cgi->a({-href => href(action=>"blob", hash=>$diff->{'to_id'},
4403                                                      hash_base=>$parent, file_name=>$diff->{'to_file'})},
4404                                       "blob") . " | ";
4405                         if ($have_blame) {
4406                                 print $cgi->a({-href => href(action=>"blame", hash_base=>$hash,
4407                                                              file_name=>$diff->{'to_file'})},
4408                                               "blame") . " | ";
4409                         }
4410                         print $cgi->a({-href => href(action=>"history", hash_base=>$hash,
4411                                                     file_name=>$diff->{'to_file'})},
4412                                       "history");
4413                         print "</td>\n";
4414
4415                 } # we should not encounter Unmerged (U) or Unknown (X) status
4416                 print "</tr>\n";
4417         }
4418         print "</tbody>" if $has_header;
4419         print "</table>\n";
4420 }
4421
4422 sub git_patchset_body {
4423         my ($fd, $difftree, $hash, @hash_parents) = @_;
4424         my ($hash_parent) = $hash_parents[0];
4425
4426         my $is_combined = (@hash_parents > 1);
4427         my $patch_idx = 0;
4428         my $patch_number = 0;
4429         my $patch_line;
4430         my $diffinfo;
4431         my $to_name;
4432         my (%from, %to);
4433
4434         print "<div class=\"patchset\">\n";
4435
4436         # skip to first patch
4437         while ($patch_line = <$fd>) {
4438                 chomp $patch_line;
4439
4440                 last if ($patch_line =~ m/^diff /);
4441         }
4442
4443  PATCH:
4444         while ($patch_line) {
4445
4446                 # parse "git diff" header line
4447                 if ($patch_line =~ m/^diff --git (\"(?:[^\\\"]*(?:\\.[^\\\"]*)*)\"|[^ "]*) (.*)$/) {
4448                         # $1 is from_name, which we do not use
4449                         $to_name = unquote($2);
4450                         $to_name =~ s!^b/!!;
4451                 } elsif ($patch_line =~ m/^diff --(cc|combined) ("?.*"?)$/) {
4452                         # $1 is 'cc' or 'combined', which we do not use
4453                         $to_name = unquote($2);
4454                 } else {
4455                         $to_name = undef;
4456                 }
4457
4458                 # check if current patch belong to current raw line
4459                 # and parse raw git-diff line if needed
4460                 if (is_patch_split($diffinfo, { 'to_file' => $to_name })) {
4461                         # this is continuation of a split patch
4462                         print "<div class=\"patch cont\">\n";
4463                 } else {
4464                         # advance raw git-diff output if needed
4465                         $patch_idx++ if defined $diffinfo;
4466
4467                         # read and prepare patch information
4468                         $diffinfo = parsed_difftree_line($difftree->[$patch_idx]);
4469
4470                         # compact combined diff output can have some patches skipped
4471                         # find which patch (using pathname of result) we are at now;
4472                         if ($is_combined) {
4473                                 while ($to_name ne $diffinfo->{'to_file'}) {
4474                                         print "<div class=\"patch\" id=\"patch". ($patch_idx+1) ."\">\n" .
4475                                               format_diff_cc_simplified($diffinfo, @hash_parents) .
4476                                               "</div>\n";  # class="patch"
4477
4478                                         $patch_idx++;
4479                                         $patch_number++;
4480
4481                                         last if $patch_idx > $#$difftree;
4482                                         $diffinfo = parsed_difftree_line($difftree->[$patch_idx]);
4483                                 }
4484                         }
4485
4486                         # modifies %from, %to hashes
4487                         parse_from_to_diffinfo($diffinfo, \%from, \%to, @hash_parents);
4488
4489                         # this is first patch for raw difftree line with $patch_idx index
4490                         # we index @$difftree array from 0, but number patches from 1
4491                         print "<div class=\"patch\" id=\"patch". ($patch_idx+1) ."\">\n";
4492                 }
4493
4494                 # git diff header
4495                 #assert($patch_line =~ m/^diff /) if DEBUG;
4496                 #assert($patch_line !~ m!$/$!) if DEBUG; # is chomp-ed
4497                 $patch_number++;
4498                 # print "git diff" header
4499                 print format_git_diff_header_line($patch_line, $diffinfo,
4500                                                   \%from, \%to);
4501
4502                 # print extended diff header
4503                 print "<div class=\"diff extended_header\">\n";
4504         EXTENDED_HEADER:
4505                 while ($patch_line = <$fd>) {
4506                         chomp $patch_line;
4507
4508                         last EXTENDED_HEADER if ($patch_line =~ m/^--- |^diff /);
4509
4510                         print format_extended_diff_header_line($patch_line, $diffinfo,
4511                                                                \%from, \%to);
4512                 }
4513                 print "</div>\n"; # class="diff extended_header"
4514
4515                 # from-file/to-file diff header
4516                 if (! $patch_line) {
4517                         print "</div>\n"; # class="patch"
4518                         last PATCH;
4519                 }
4520                 next PATCH if ($patch_line =~ m/^diff /);
4521                 #assert($patch_line =~ m/^---/) if DEBUG;
4522
4523                 my $last_patch_line = $patch_line;
4524                 $patch_line = <$fd>;
4525                 chomp $patch_line;
4526                 #assert($patch_line =~ m/^\+\+\+/) if DEBUG;
4527
4528                 print format_diff_from_to_header($last_patch_line, $patch_line,
4529                                                  $diffinfo, \%from, \%to,
4530                                                  @hash_parents);
4531
4532                 # the patch itself
4533         LINE:
4534                 while ($patch_line = <$fd>) {
4535                         chomp $patch_line;
4536
4537                         next PATCH if ($patch_line =~ m/^diff /);
4538
4539                         print format_diff_line($patch_line, \%from, \%to);
4540                 }
4541
4542         } continue {
4543                 print "</div>\n"; # class="patch"
4544         }
4545
4546         # for compact combined (--cc) format, with chunk and patch simplification
4547         # the patchset might be empty, but there might be unprocessed raw lines
4548         for (++$patch_idx if $patch_number > 0;
4549              $patch_idx < @$difftree;
4550              ++$patch_idx) {
4551                 # read and prepare patch information
4552                 $diffinfo = parsed_difftree_line($difftree->[$patch_idx]);
4553
4554                 # generate anchor for "patch" links in difftree / whatchanged part
4555                 print "<div class=\"patch\" id=\"patch". ($patch_idx+1) ."\">\n" .
4556                       format_diff_cc_simplified($diffinfo, @hash_parents) .
4557                       "</div>\n";  # class="patch"
4558
4559                 $patch_number++;
4560         }
4561
4562         if ($patch_number == 0) {
4563                 if (@hash_parents > 1) {
4564                         print "<div class=\"diff nodifferences\">Trivial merge</div>\n";
4565                 } else {
4566                         print "<div class=\"diff nodifferences\">No differences found</div>\n";
4567                 }
4568         }
4569
4570         print "</div>\n"; # class="patchset"
4571 }
4572
4573 # . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
4574
4575 # fills project list info (age, description, owner, forks) for each
4576 # project in the list, removing invalid projects from returned list
4577 # NOTE: modifies $projlist, but does not remove entries from it
4578 sub fill_project_list_info {
4579         my ($projlist, $check_forks) = @_;
4580         my @projects;
4581
4582         my $show_ctags = gitweb_check_feature('ctags');
4583  PROJECT:
4584         foreach my $pr (@$projlist) {
4585                 my (@activity) = git_get_last_activity($pr->{'path'});
4586                 unless (@activity) {
4587                         next PROJECT;
4588                 }
4589                 ($pr->{'age'}, $pr->{'age_string'}) = @activity;
4590                 if (!defined $pr->{'descr'}) {
4591                         my $descr = git_get_project_description($pr->{'path'}) || "";
4592                         $descr = to_utf8($descr);
4593                         $pr->{'descr_long'} = $descr;
4594                         $pr->{'descr'} = chop_str($descr, $projects_list_description_width, 5);
4595                 }
4596                 if (!defined $pr->{'owner'}) {
4597                         $pr->{'owner'} = git_get_project_owner("$pr->{'path'}") || "";
4598                 }
4599                 if ($check_forks) {
4600                         my $pname = $pr->{'path'};
4601                         if (($pname =~ s/\.git$//) &&
4602                             ($pname !~ /\/$/) &&
4603                             (-d "$projectroot/$pname")) {
4604                                 $pr->{'forks'} = "-d $projectroot/$pname";
4605                         } else {
4606                                 $pr->{'forks'} = 0;
4607                         }
4608                 }
4609                 $show_ctags and $pr->{'ctags'} = git_get_project_ctags($pr->{'path'});
4610                 push @projects, $pr;
4611         }
4612
4613         return @projects;
4614 }
4615
4616 # print 'sort by' <th> element, generating 'sort by $name' replay link
4617 # if that order is not selected
4618 sub print_sort_th {
4619         print format_sort_th(@_);
4620 }
4621
4622 sub format_sort_th {
4623         my ($name, $order, $header) = @_;
4624         my $sort_th = "";
4625         $header ||= ucfirst($name);
4626
4627         if ($order eq $name) {
4628                 $sort_th .= "<th>$header</th>\n";
4629         } else {
4630                 $sort_th .= "<th>" .
4631                             $cgi->a({-href => href(-replay=>1, order=>$name),
4632                                      -class => "header"}, $header) .
4633                             "</th>\n";
4634         }
4635
4636         return $sort_th;
4637 }
4638
4639 sub git_project_list_body {
4640         # actually uses global variable $project
4641         my ($projlist, $order, $from, $to, $extra, $no_header) = @_;
4642
4643         my $check_forks = gitweb_check_feature('forks');
4644         my @projects = fill_project_list_info($projlist, $check_forks);
4645
4646         $order ||= $default_projects_order;
4647         $from = 0 unless defined $from;
4648         $to = $#projects if (!defined $to || $#projects < $to);
4649
4650         my %order_info = (
4651                 project => { key => 'path', type => 'str' },
4652                 descr => { key => 'descr_long', type => 'str' },
4653                 owner => { key => 'owner', type => 'str' },
4654                 age => { key => 'age', type => 'num' }
4655         );
4656         my $oi = $order_info{$order};
4657         if ($oi->{'type'} eq 'str') {
4658                 @projects = sort {$a->{$oi->{'key'}} cmp $b->{$oi->{'key'}}} @projects;
4659         } else {
4660                 @projects = sort {$a->{$oi->{'key'}} <=> $b->{$oi->{'key'}}} @projects;
4661         }
4662
4663         my $show_ctags = gitweb_check_feature('ctags');
4664         if ($show_ctags) {
4665                 my %ctags;
4666                 foreach my $p (@projects) {
4667                         foreach my $ct (keys %{$p->{'ctags'}}) {
4668                                 $ctags{$ct} += $p->{'ctags'}->{$ct};
4669                         }
4670                 }
4671                 my $cloud = git_populate_project_tagcloud(\%ctags);
4672                 print git_show_project_tagcloud($cloud, 64);
4673         }
4674
4675         print "<table class=\"project_list\">\n";
4676         unless ($no_header) {
4677                 print "<tr>\n";
4678                 if ($check_forks) {
4679                         print "<th></th>\n";
4680                 }
4681                 print_sort_th('project', $order, 'Project');
4682                 print_sort_th('descr', $order, 'Description');
4683                 print_sort_th('owner', $order, 'Owner');
4684                 print_sort_th('age', $order, 'Last Change');
4685                 print "<th></th>\n" . # for links
4686                       "</tr>\n";
4687         }
4688         my $alternate = 1;
4689         my $tagfilter = $cgi->param('by_tag');
4690         for (my $i = $from; $i <= $to; $i++) {
4691                 my $pr = $projects[$i];
4692
4693                 next if $tagfilter and $show_ctags and not grep { lc $_ eq lc $tagfilter } keys %{$pr->{'ctags'}};
4694                 next if $searchtext and not $pr->{'path'} =~ /$searchtext/
4695                         and not $pr->{'descr_long'} =~ /$searchtext/;
4696                 # Weed out forks or non-matching entries of search
4697                 if ($check_forks) {
4698                         my $forkbase = $project; $forkbase ||= ''; $forkbase =~ s#\.git$#/#;
4699                         $forkbase="^$forkbase" if $forkbase;
4700                         next if not $searchtext and not $tagfilter and $show_ctags
4701                                 and $pr->{'path'} =~ m#$forkbase.*/.*#; # regexp-safe
4702                 }
4703
4704                 if ($alternate) {
4705                         print "<tr class=\"dark\">\n";
4706                 } else {
4707                         print "<tr class=\"light\">\n";
4708                 }
4709                 $alternate ^= 1;
4710                 if ($check_forks) {
4711                         print "<td>";
4712                         if ($pr->{'forks'}) {
4713                                 print "<!-- $pr->{'forks'} -->\n";
4714                                 print $cgi->a({-href => href(project=>$pr->{'path'}, action=>"forks")}, "+");
4715                         }
4716                         print "</td>\n";
4717                 }
4718                 print "<td>" . $cgi->a({-href => href(project=>$pr->{'path'}, action=>"summary"),
4719                                         -class => "list"}, esc_html($pr->{'path'})) . "</td>\n" .
4720                       "<td>" . $cgi->a({-href => href(project=>$pr->{'path'}, action=>"summary"),
4721                                         -class => "list", -title => $pr->{'descr_long'}},
4722                                         esc_html($pr->{'descr'})) . "</td>\n" .
4723                       "<td><i>" . chop_and_escape_str($pr->{'owner'}, 15) . "</i></td>\n";
4724                 print "<td class=\"". age_class($pr->{'age'}) . "\">" .
4725                       (defined $pr->{'age_string'} ? $pr->{'age_string'} : "No commits") . "</td>\n" .
4726                       "<td class=\"link\">" .
4727                       $cgi->a({-href => href(project=>$pr->{'path'}, action=>"summary")}, "summary")   . " | " .
4728                       $cgi->a({-href => href(project=>$pr->{'path'}, action=>"shortlog")}, "shortlog") . " | " .
4729                       $cgi->a({-href => href(project=>$pr->{'path'}, action=>"log")}, "log") . " | " .
4730                       $cgi->a({-href => href(project=>$pr->{'path'}, action=>"tree")}, "tree") .
4731                       ($pr->{'forks'} ? " | " . $cgi->a({-href => href(project=>$pr->{'path'}, action=>"forks")}, "forks") : '') .
4732                       "</td>\n" .
4733                       "</tr>\n";
4734         }
4735         if (defined $extra) {
4736                 print "<tr>\n";
4737                 if ($check_forks) {
4738                         print "<td></td>\n";
4739                 }
4740                 print "<td colspan=\"5\">$extra</td>\n" .
4741                       "</tr>\n";
4742         }
4743         print "</table>\n";
4744 }
4745
4746 sub git_log_body {
4747         # uses global variable $project
4748         my ($commitlist, $from, $to, $refs, $extra) = @_;
4749
4750         $from = 0 unless defined $from;
4751         $to = $#{$commitlist} if (!defined $to || $#{$commitlist} < $to);
4752
4753         for (my $i = 0; $i <= $to; $i++) {
4754                 my %co = %{$commitlist->[$i]};
4755                 next if !%co;
4756                 my $commit = $co{'id'};
4757                 my $ref = format_ref_marker($refs, $commit);
4758                 my %ad = parse_date($co{'author_epoch'});
4759                 git_print_header_div('commit',
4760                                "<span class=\"age\">$co{'age_string'}</span>" .
4761                                esc_html($co{'title'}) . $ref,
4762                                $commit);
4763                 print "<div class=\"title_text\">\n" .
4764                       "<div class=\"log_link\">\n" .
4765                       $cgi->a({-href => href(action=>"commit", hash=>$commit)}, "commit") .
4766                       " | " .
4767                       $cgi->a({-href => href(action=>"commitdiff", hash=>$commit)}, "commitdiff") .
4768                       " | " .
4769                       $cgi->a({-href => href(action=>"tree", hash=>$commit, hash_base=>$commit)}, "tree") .
4770                       "<br/>\n" .
4771                       "</div>\n";
4772                       git_print_authorship(\%co, -tag => 'span');
4773                       print "<br/>\n</div>\n";
4774
4775                 print "<div class=\"log_body\">\n";
4776                 git_print_log($co{'comment'}, -final_empty_line=> 1);
4777                 print "</div>\n";
4778         }
4779         if ($extra) {
4780                 print "<div class=\"page_nav\">\n";
4781                 print "$extra\n";
4782                 print "</div>\n";
4783         }
4784 }
4785
4786 sub git_shortlog_body {
4787         # uses global variable $project
4788         my ($commitlist, $from, $to, $refs, $extra) = @_;
4789
4790         $from = 0 unless defined $from;
4791         $to = $#{$commitlist} if (!defined $to || $#{$commitlist} < $to);
4792
4793         print "<table class=\"shortlog\">\n";
4794         my $alternate = 1;
4795         for (my $i = $from; $i <= $to; $i++) {
4796                 my %co = %{$commitlist->[$i]};
4797                 my $commit = $co{'id'};
4798                 my $ref = format_ref_marker($refs, $commit);
4799                 if ($alternate) {
4800                         print "<tr class=\"dark\">\n";
4801                 } else {
4802                         print "<tr class=\"light\">\n";
4803                 }
4804                 $alternate ^= 1;
4805                 # git_summary() used print "<td><i>$co{'age_string'}</i></td>\n" .
4806                 print "<td title=\"$co{'age_string_age'}\"><i>$co{'age_string_date'}</i></td>\n" .
4807                       format_author_html('td', \%co, 10) . "<td>";
4808                 print format_subject_html($co{'title'}, $co{'title_short'},
4809                                           href(action=>"commit", hash=>$commit), $ref);
4810                 print "</td>\n" .
4811                       "<td class=\"link\">" .
4812                       $cgi->a({-href => href(action=>"commit", hash=>$commit)}, "commit") . " | " .
4813                       $cgi->a({-href => href(action=>"commitdiff", hash=>$commit)}, "commitdiff") . " | " .
4814                       $cgi->a({-href => href(action=>"tree", hash=>$commit, hash_base=>$commit)}, "tree");
4815                 my $snapshot_links = format_snapshot_links($commit);
4816                 if (defined $snapshot_links) {
4817                         print " | " . $snapshot_links;
4818                 }
4819                 print "</td>\n" .
4820                       "</tr>\n";
4821         }
4822         if (defined $extra) {
4823                 print "<tr>\n" .
4824                       "<td colspan=\"4\">$extra</td>\n" .
4825                       "</tr>\n";
4826         }
4827         print "</table>\n";
4828 }
4829
4830 sub git_history_body {
4831         # Warning: assumes constant type (blob or tree) during history
4832         my ($commitlist, $from, $to, $refs, $extra,
4833             $file_name, $file_hash, $ftype) = @_;
4834
4835         $from = 0 unless defined $from;
4836         $to = $#{$commitlist} unless (defined $to && $to <= $#{$commitlist});
4837
4838         print "<table class=\"history\">\n";
4839         my $alternate = 1;
4840         for (my $i = $from; $i <= $to; $i++) {
4841                 my %co = %{$commitlist->[$i]};
4842                 if (!%co) {
4843                         next;
4844                 }
4845                 my $commit = $co{'id'};
4846
4847                 my $ref = format_ref_marker($refs, $commit);
4848
4849                 if ($alternate) {
4850                         print "<tr class=\"dark\">\n";
4851                 } else {
4852                         print "<tr class=\"light\">\n";
4853                 }
4854                 $alternate ^= 1;
4855                 print "<td title=\"$co{'age_string_age'}\"><i>$co{'age_string_date'}</i></td>\n" .
4856         # shortlog:   format_author_html('td', \%co, 10)
4857                       format_author_html('td', \%co, 15, 3) . "<td>";
4858                 # originally git_history used chop_str($co{'title'}, 50)
4859                 print format_subject_html($co{'title'}, $co{'title_short'},
4860                                           href(action=>"commit", hash=>$commit), $ref);
4861                 print "</td>\n" .
4862                       "<td class=\"link\">" .
4863                       $cgi->a({-href => href(action=>$ftype, hash_base=>$commit, file_name=>$file_name)}, $ftype) . " | " .
4864                       $cgi->a({-href => href(action=>"commitdiff", hash=>$commit)}, "commitdiff");
4865
4866                 if ($ftype eq 'blob') {
4867                         my $blob_current = $file_hash;
4868                         my $blob_parent  = git_get_hash_by_path($commit, $file_name);
4869                         if (defined $blob_current && defined $blob_parent &&
4870                                         $blob_current ne $blob_parent) {
4871                                 print " | " .
4872                                         $cgi->a({-href => href(action=>"blobdiff",
4873                                                                hash=>$blob_current, hash_parent=>$blob_parent,
4874                                                                hash_base=>$hash_base, hash_parent_base=>$commit,
4875                                                                file_name=>$file_name)},
4876                                                 "diff to current");
4877                         }
4878                 }
4879                 print "</td>\n" .
4880                       "</tr>\n";
4881         }
4882         if (defined $extra) {
4883                 print "<tr>\n" .
4884                       "<td colspan=\"4\">$extra</td>\n" .
4885                       "</tr>\n";
4886         }
4887         print "</table>\n";
4888 }
4889
4890 sub git_tags_body {
4891         # uses global variable $project
4892         my ($taglist, $from, $to, $extra) = @_;
4893         $from = 0 unless defined $from;
4894         $to = $#{$taglist} if (!defined $to || $#{$taglist} < $to);
4895
4896         print "<table class=\"tags\">\n";
4897         my $alternate = 1;
4898         for (my $i = $from; $i <= $to; $i++) {
4899                 my $entry = $taglist->[$i];
4900                 my %tag = %$entry;
4901                 my $comment = $tag{'subject'};
4902                 my $comment_short;
4903                 if (defined $comment) {
4904                         $comment_short = chop_str($comment, 30, 5);
4905                 }
4906                 if ($alternate) {
4907                         print "<tr class=\"dark\">\n";
4908                 } else {
4909                         print "<tr class=\"light\">\n";
4910                 }
4911                 $alternate ^= 1;
4912                 if (defined $tag{'age'}) {
4913                         print "<td><i>$tag{'age'}</i></td>\n";
4914                 } else {
4915                         print "<td></td>\n";
4916                 }
4917                 print "<td>" .
4918                       $cgi->a({-href => href(action=>$tag{'reftype'}, hash=>$tag{'refid'}),
4919                                -class => "list name"}, esc_html($tag{'name'})) .
4920                       "</td>\n" .
4921                       "<td>";
4922                 if (defined $comment) {
4923                         print format_subject_html($comment, $comment_short,
4924                                                   href(action=>"tag", hash=>$tag{'id'}));
4925                 }
4926                 print "</td>\n" .
4927                       "<td class=\"selflink\">";
4928                 if ($tag{'type'} eq "tag") {
4929                         print $cgi->a({-href => href(action=>"tag", hash=>$tag{'id'})}, "tag");
4930                 } else {
4931                         print "&nbsp;";
4932                 }
4933                 print "</td>\n" .
4934                       "<td class=\"link\">" . " | " .
4935                       $cgi->a({-href => href(action=>$tag{'reftype'}, hash=>$tag{'refid'})}, $tag{'reftype'});
4936                 if ($tag{'reftype'} eq "commit") {
4937                         print " | " . $cgi->a({-href => href(action=>"shortlog", hash=>$tag{'fullname'})}, "shortlog") .
4938                               " | " . $cgi->a({-href => href(action=>"log", hash=>$tag{'fullname'})}, "log");
4939                 } elsif ($tag{'reftype'} eq "blob") {
4940                         print " | " . $cgi->a({-href => href(action=>"blob_plain", hash=>$tag{'refid'})}, "raw");
4941                 }
4942                 print "</td>\n" .
4943                       "</tr>";
4944         }
4945         if (defined $extra) {
4946                 print "<tr>\n" .
4947                       "<td colspan=\"5\">$extra</td>\n" .
4948                       "</tr>\n";
4949         }
4950         print "</table>\n";
4951 }
4952
4953 sub git_heads_body {
4954         # uses global variable $project
4955         my ($headlist, $head, $from, $to, $extra) = @_;
4956         $from = 0 unless defined $from;
4957         $to = $#{$headlist} if (!defined $to || $#{$headlist} < $to);
4958
4959         print "<table class=\"heads\">\n";
4960         my $alternate = 1;
4961         for (my $i = $from; $i <= $to; $i++) {
4962                 my $entry = $headlist->[$i];
4963                 my %ref = %$entry;
4964                 my $curr = $ref{'id'} eq $head;
4965                 if ($alternate) {
4966                         print "<tr class=\"dark\">\n";
4967                 } else {
4968                         print "<tr class=\"light\">\n";
4969                 }
4970                 $alternate ^= 1;
4971                 print "<td><i>$ref{'age'}</i></td>\n" .
4972                       ($curr ? "<td class=\"current_head\">" : "<td>") .
4973                       $cgi->a({-href => href(action=>"shortlog", hash=>$ref{'fullname'}),
4974                                -class => "list name"},esc_html($ref{'name'})) .
4975                       "</td>\n" .
4976                       "<td class=\"link\">" .
4977                       $cgi->a({-href => href(action=>"shortlog", hash=>$ref{'fullname'})}, "shortlog") . " | " .
4978                       $cgi->a({-href => href(action=>"log", hash=>$ref{'fullname'})}, "log") . " | " .
4979                       $cgi->a({-href => href(action=>"tree", hash=>$ref{'fullname'}, hash_base=>$ref{'fullname'})}, "tree") .
4980                       "</td>\n" .
4981                       "</tr>";
4982         }
4983         if (defined $extra) {
4984                 print "<tr>\n" .
4985                       "<td colspan=\"3\">$extra</td>\n" .
4986                       "</tr>\n";
4987         }
4988         print "</table>\n";
4989 }
4990
4991 sub git_search_grep_body {
4992         my ($commitlist, $from, $to, $extra) = @_;
4993         $from = 0 unless defined $from;
4994         $to = $#{$commitlist} if (!defined $to || $#{$commitlist} < $to);
4995
4996         print "<table class=\"commit_search\">\n";
4997         my $alternate = 1;
4998         for (my $i = $from; $i <= $to; $i++) {
4999                 my %co = %{$commitlist->[$i]};
5000                 if (!%co) {
5001                         next;
5002                 }
5003                 my $commit = $co{'id'};
5004                 if ($alternate) {
5005                         print "<tr class=\"dark\">\n";
5006                 } else {
5007                         print "<tr class=\"light\">\n";
5008                 }
5009                 $alternate ^= 1;
5010                 print "<td title=\"$co{'age_string_age'}\"><i>$co{'age_string_date'}</i></td>\n" .
5011                       format_author_html('td', \%co, 15, 5) .
5012                       "<td>" .
5013                       $cgi->a({-href => href(action=>"commit", hash=>$co{'id'}),
5014                                -class => "list subject"},
5015                               chop_and_escape_str($co{'title'}, 50) . "<br/>");
5016                 my $comment = $co{'comment'};
5017                 foreach my $line (@$comment) {
5018                         if ($line =~ m/^(.*?)($search_regexp)(.*)$/i) {
5019                                 my ($lead, $match, $trail) = ($1, $2, $3);
5020                                 $match = chop_str($match, 70, 5, 'center');
5021                                 my $contextlen = int((80 - length($match))/2);
5022                                 $contextlen = 30 if ($contextlen > 30);
5023                                 $lead  = chop_str($lead,  $contextlen, 10, 'left');
5024                                 $trail = chop_str($trail, $contextlen, 10, 'right');
5025
5026                                 $lead  = esc_html($lead);
5027                                 $match = esc_html($match);
5028                                 $trail = esc_html($trail);
5029
5030                                 print "$lead<span class=\"match\">$match</span>$trail<br />";
5031                         }
5032                 }
5033                 print "</td>\n" .
5034                       "<td class=\"link\">" .
5035                       $cgi->a({-href => href(action=>"commit", hash=>$co{'id'})}, "commit") .
5036                       " | " .
5037                       $cgi->a({-href => href(action=>"commitdiff", hash=>$co{'id'})}, "commitdiff") .
5038                       " | " .
5039                       $cgi->a({-href => href(action=>"tree", hash=>$co{'tree'}, hash_base=>$co{'id'})}, "tree");
5040                 print "</td>\n" .
5041                       "</tr>\n";
5042         }
5043         if (defined $extra) {
5044                 print "<tr>\n" .
5045                       "<td colspan=\"3\">$extra</td>\n" .
5046                       "</tr>\n";
5047         }
5048         print "</table>\n";
5049 }
5050
5051 ## ======================================================================
5052 ## ======================================================================
5053 ## actions
5054
5055 sub git_project_list {
5056         my $order = $input_params{'order'};
5057         if (defined $order && $order !~ m/none|project|descr|owner|age/) {
5058                 die_error(400, "Unknown order parameter");
5059         }
5060
5061         my @list = git_get_projects_list();
5062         if (!@list) {
5063                 die_error(404, "No projects found");
5064         }
5065
5066         git_header_html();
5067         if (defined $home_text && -f $home_text) {
5068                 print "<div class=\"index_include\">\n";
5069                 insert_file($home_text);
5070                 print "</div>\n";
5071         }
5072         print $cgi->startform(-method => "get") .
5073               "<p class=\"projsearch\">Search:\n" .
5074               $cgi->textfield(-name => "s", -value => $searchtext) . "\n" .
5075               "</p>" .
5076               $cgi->end_form() . "\n";
5077         git_project_list_body(\@list, $order);
5078         git_footer_html();
5079 }
5080
5081 sub git_forks {
5082         my $order = $input_params{'order'};
5083         if (defined $order && $order !~ m/none|project|descr|owner|age/) {
5084                 die_error(400, "Unknown order parameter");
5085         }
5086
5087         my @list = git_get_projects_list($project);
5088         if (!@list) {
5089                 die_error(404, "No forks found");
5090         }
5091
5092         git_header_html();
5093         git_print_page_nav('','');
5094         git_print_header_div('summary', "$project forks");
5095         git_project_list_body(\@list, $order);
5096         git_footer_html();
5097 }
5098
5099 sub git_project_index {
5100         my @projects = git_get_projects_list($project);
5101
5102         print $cgi->header(
5103                 -type => 'text/plain',
5104                 -charset => 'utf-8',
5105                 -content_disposition => 'inline; filename="index.aux"');
5106
5107         foreach my $pr (@projects) {
5108                 if (!exists $pr->{'owner'}) {
5109                         $pr->{'owner'} = git_get_project_owner("$pr->{'path'}");
5110                 }
5111
5112                 my ($path, $owner) = ($pr->{'path'}, $pr->{'owner'});
5113                 # quote as in CGI::Util::encode, but keep the slash, and use '+' for ' '
5114                 $path  =~ s/([^a-zA-Z0-9_.\-\/ ])/sprintf("%%%02X", ord($1))/eg;
5115                 $owner =~ s/([^a-zA-Z0-9_.\-\/ ])/sprintf("%%%02X", ord($1))/eg;
5116                 $path  =~ s/ /\+/g;
5117                 $owner =~ s/ /\+/g;
5118
5119                 print "$path $owner\n";
5120         }
5121 }
5122
5123 sub git_summary {
5124         my $descr = git_get_project_description($project) || "none";
5125         my %co = parse_commit("HEAD");
5126         my %cd = %co ? parse_date($co{'committer_epoch'}, $co{'committer_tz'}) : ();
5127         my $head = $co{'id'};
5128
5129         my $owner = git_get_project_owner($project);
5130
5131         my $refs = git_get_references();
5132         # These get_*_list functions return one more to allow us to see if
5133         # there are more ...
5134         my @taglist  = git_get_tags_list(16);
5135         my @headlist = git_get_heads_list(16);
5136         my @forklist;
5137         my $check_forks = gitweb_check_feature('forks');
5138
5139         if ($check_forks) {
5140                 @forklist = git_get_projects_list($project);
5141         }
5142
5143         git_header_html();
5144         git_print_page_nav('summary','', $head);
5145
5146         print "<div class=\"title\">&nbsp;</div>\n";
5147         print "<table class=\"projects_list\">\n" .
5148               "<tr id=\"metadata_desc\"><td>description</td><td>" . esc_html($descr) . "</td></tr>\n" .
5149               "<tr id=\"metadata_owner\"><td>owner</td><td>" . esc_html($owner) . "</td></tr>\n";
5150         if (defined $cd{'rfc2822'}) {
5151                 print "<tr id=\"metadata_lchange\"><td>last change</td><td>$cd{'rfc2822'}</td></tr>\n";
5152         }
5153
5154         # use per project git URL list in $projectroot/$project/cloneurl
5155         # or make project git URL from git base URL and project name
5156         my $url_tag = "URL";
5157         my @url_list = git_get_project_url_list($project);
5158         @url_list = map { "$_/$project" } @git_base_url_list unless @url_list;
5159         foreach my $git_url (@url_list) {
5160                 next unless $git_url;
5161                 print "<tr class=\"metadata_url\"><td>$url_tag</td><td>$git_url</td></tr>\n";
5162                 $url_tag = "";
5163         }
5164
5165         # Tag cloud
5166         my $show_ctags = gitweb_check_feature('ctags');
5167         if ($show_ctags) {
5168                 my $ctags = git_get_project_ctags($project);
5169                 my $cloud = git_populate_project_tagcloud($ctags);
5170                 print "<tr id=\"metadata_ctags\"><td>Content tags:<br />";
5171                 print "</td>\n<td>" unless %$ctags;
5172                 print "<form action=\"$show_ctags\" method=\"post\"><input type=\"hidden\" name=\"p\" value=\"$project\" />Add: <input type=\"text\" name=\"t\" size=\"8\" /></form>";
5173                 print "</td>\n<td>" if %$ctags;
5174                 print git_show_project_tagcloud($cloud, 48);
5175                 print "</td></tr>";
5176         }
5177
5178         print "</table>\n";
5179
5180         # If XSS prevention is on, we don't include README.html.
5181         # TODO: Allow a readme in some safe format.
5182         if (!$prevent_xss && -s "$projectroot/$project/README.html") {
5183                 print "<div class=\"title\">readme</div>\n" .
5184                       "<div class=\"readme\">\n";
5185                 insert_file("$projectroot/$project/README.html");
5186                 print "\n</div>\n"; # class="readme"
5187         }
5188
5189         # we need to request one more than 16 (0..15) to check if
5190         # those 16 are all
5191         my @commitlist = $head ? parse_commits($head, 17) : ();
5192         if (@commitlist) {
5193                 git_print_header_div('shortlog');
5194                 git_shortlog_body(\@commitlist, 0, 15, $refs,
5195                                   $#commitlist <=  15 ? undef :
5196                                   $cgi->a({-href => href(action=>"shortlog")}, "..."));
5197         }
5198
5199         if (@taglist) {
5200                 git_print_header_div('tags');
5201                 git_tags_body(\@taglist, 0, 15,
5202                               $#taglist <=  15 ? undef :
5203                               $cgi->a({-href => href(action=>"tags")}, "..."));
5204         }
5205
5206         if (@headlist) {
5207                 git_print_header_div('heads');
5208                 git_heads_body(\@headlist, $head, 0, 15,
5209                                $#headlist <= 15 ? undef :
5210                                $cgi->a({-href => href(action=>"heads")}, "..."));
5211         }
5212
5213         if (@forklist) {
5214                 git_print_header_div('forks');
5215                 git_project_list_body(\@forklist, 'age', 0, 15,
5216                                       $#forklist <= 15 ? undef :
5217                                       $cgi->a({-href => href(action=>"forks")}, "..."),
5218                                       'no_header');
5219         }
5220
5221         git_footer_html();
5222 }
5223
5224 sub git_tag {
5225         my %tag = parse_tag($hash);
5226
5227         if (! %tag) {
5228                 die_error(404, "Unknown tag object");
5229         }
5230
5231         my $head = git_get_head_hash($project);
5232         git_header_html();
5233         git_print_page_nav('','', $head,undef,$head);
5234         git_print_header_div('commit', esc_html($tag{'name'}), $hash);
5235         print "<div class=\"title_text\">\n" .
5236               "<table class=\"object_header\">\n" .
5237               "<tr>\n" .
5238               "<td>object</td>\n" .
5239               "<td>" . $cgi->a({-class => "list", -href => href(action=>$tag{'type'}, hash=>$tag{'object'})},
5240                                $tag{'object'}) . "</td>\n" .
5241               "<td class=\"link\">" . $cgi->a({-href => href(action=>$tag{'type'}, hash=>$tag{'object'})},
5242                                               $tag{'type'}) . "</td>\n" .
5243               "</tr>\n";
5244         if (defined($tag{'author'})) {
5245                 git_print_authorship_rows(\%tag, 'author');
5246         }
5247         print "</table>\n\n" .
5248               "</div>\n";
5249         print "<div class=\"page_body\">";
5250         my $comment = $tag{'comment'};
5251         foreach my $line (@$comment) {
5252                 chomp $line;
5253                 print esc_html($line, -nbsp=>1) . "<br/>\n";
5254         }
5255         print "</div>\n";
5256         git_footer_html();
5257 }
5258
5259 sub git_blame_common {
5260         my $format = shift || 'porcelain';
5261         if ($format eq 'porcelain' && $cgi->param('js')) {
5262                 $format = 'incremental';
5263                 $action = 'blame_incremental'; # for page title etc
5264         }
5265
5266         # permissions
5267         gitweb_check_feature('blame')
5268                 or die_error(403, "Blame view not allowed");
5269
5270         # error checking
5271         die_error(400, "No file name given") unless $file_name;
5272         $hash_base ||= git_get_head_hash($project);
5273         die_error(404, "Couldn't find base commit") unless $hash_base;
5274         my %co = parse_commit($hash_base)
5275                 or die_error(404, "Commit not found");
5276         my $ftype = "blob";
5277         if (!defined $hash) {
5278                 $hash = git_get_hash_by_path($hash_base, $file_name, "blob")
5279                         or die_error(404, "Error looking up file");
5280         } else {
5281                 $ftype = git_get_type($hash);
5282                 if ($ftype !~ "blob") {
5283                         die_error(400, "Object is not a blob");
5284                 }
5285         }
5286
5287         my $fd;
5288         if ($format eq 'incremental') {
5289                 # get file contents (as base)
5290                 open $fd, "-|", git_cmd(), 'cat-file', 'blob', $hash
5291                         or die_error(500, "Open git-cat-file failed");
5292         } elsif ($format eq 'data') {
5293                 # run git-blame --incremental
5294                 open $fd, "-|", git_cmd(), "blame", "--incremental",
5295                         $hash_base, "--", $file_name
5296                         or die_error(500, "Open git-blame --incremental failed");
5297         } else {
5298                 # run git-blame --porcelain
5299                 open $fd, "-|", git_cmd(), "blame", '-p',
5300                         $hash_base, '--', $file_name
5301                         or die_error(500, "Open git-blame --porcelain failed");
5302         }
5303
5304         # incremental blame data returns early
5305         if ($format eq 'data') {
5306                 print $cgi->header(
5307                         -type=>"text/plain", -charset => "utf-8",
5308                         -status=> "200 OK");
5309                 local $| = 1; # output autoflush
5310                 print while <$fd>;
5311                 close $fd
5312                         or print "ERROR $!\n";
5313
5314                 print 'END';
5315                 if (defined $t0 && gitweb_check_feature('timed')) {
5316                         print ' '.
5317                               tv_interval($t0, [ gettimeofday() ]).
5318                               ' '.$number_of_git_cmds;
5319                 }
5320                 print "\n";
5321
5322                 return;
5323         }
5324
5325         # page header
5326         git_header_html();
5327         my $formats_nav =
5328                 $cgi->a({-href => href(action=>"blob", -replay=>1)},
5329                         "blob") .
5330                 " | ";
5331         if ($format eq 'incremental') {
5332                 $formats_nav .=
5333                         $cgi->a({-href => href(action=>"blame", javascript=>0, -replay=>1)},
5334                                 "blame") . " (non-incremental)";
5335         } else {
5336                 $formats_nav .=
5337                         $cgi->a({-href => href(action=>"blame_incremental", -replay=>1)},
5338                                 "blame") . " (incremental)";
5339         }
5340         $formats_nav .=
5341                 " | " .
5342                 $cgi->a({-href => href(action=>"history", -replay=>1)},
5343                         "history") .
5344                 " | " .
5345                 $cgi->a({-href => href(action=>$action, file_name=>$file_name)},
5346                         "HEAD");
5347         git_print_page_nav('','', $hash_base,$co{'tree'},$hash_base, $formats_nav);
5348         git_print_header_div('commit', esc_html($co{'title'}), $hash_base);
5349         git_print_page_path($file_name, $ftype, $hash_base);
5350
5351         # page body
5352         if ($format eq 'incremental') {
5353                 print "<noscript>\n<div class=\"error\"><center><b>\n".
5354                       "This page requires JavaScript to run.\n Use ".
5355                       $cgi->a({-href => href(action=>'blame',javascript=>0,-replay=>1)},
5356                               'this page').
5357                       " instead.\n".
5358                       "</b></center></div>\n</noscript>\n";
5359
5360                 print qq!<div id="progress_bar" style="width: 100%; background-color: yellow"></div>\n!;
5361         }
5362
5363         print qq!<div class="page_body">\n!;
5364         print qq!<div id="progress_info">... / ...</div>\n!
5365                 if ($format eq 'incremental');
5366         print qq!<table id="blame_table" class="blame" width="100%">\n!.
5367               #qq!<col width="5.5em" /><col width="2.5em" /><col width="*" />\n!.
5368               qq!<thead>\n!.
5369               qq!<tr><th>Commit</th><th>Line</th><th>Data</th></tr>\n!.
5370               qq!</thead>\n!.
5371               qq!<tbody>\n!;
5372
5373         my @rev_color = qw(light dark);
5374         my $num_colors = scalar(@rev_color);
5375         my $current_color = 0;
5376
5377         if ($format eq 'incremental') {
5378                 my $color_class = $rev_color[$current_color];
5379
5380                 #contents of a file
5381                 my $linenr = 0;
5382         LINE:
5383                 while (my $line = <$fd>) {
5384                         chomp $line;
5385                         $linenr++;
5386
5387                         print qq!<tr id="l$linenr" class="$color_class">!.
5388                               qq!<td class="sha1"><a href=""> </a></td>!.
5389                               qq!<td class="linenr">!.
5390                               qq!<a class="linenr" href="">$linenr</a></td>!;
5391                         print qq!<td class="pre">! . esc_html($line) . "</td>\n";
5392                         print qq!</tr>\n!;
5393                 }
5394
5395         } else { # porcelain, i.e. ordinary blame
5396                 my %metainfo = (); # saves information about commits
5397
5398                 # blame data
5399         LINE:
5400                 while (my $line = <$fd>) {
5401                         chomp $line;
5402                         # the header: <SHA-1> <src lineno> <dst lineno> [<lines in group>]
5403                         # no <lines in group> for subsequent lines in group of lines
5404                         my ($full_rev, $orig_lineno, $lineno, $group_size) =
5405                            ($line =~ /^([0-9a-f]{40}) (\d+) (\d+)(?: (\d+))?$/);
5406                         if (!exists $metainfo{$full_rev}) {
5407                                 $metainfo{$full_rev} = { 'nprevious' => 0 };
5408                         }
5409                         my $meta = $metainfo{$full_rev};
5410                         my $data;
5411                         while ($data = <$fd>) {
5412                                 chomp $data;
5413                                 last if ($data =~ s/^\t//); # contents of line
5414                                 if ($data =~ /^(\S+)(?: (.*))?$/) {
5415                                         $meta->{$1} = $2 unless exists $meta->{$1};
5416                                 }
5417                                 if ($data =~ /^previous /) {
5418                                         $meta->{'nprevious'}++;
5419                                 }
5420                         }
5421                         my $short_rev = substr($full_rev, 0, 8);
5422                         my $author = $meta->{'author'};
5423                         my %date =
5424                                 parse_date($meta->{'author-time'}, $meta->{'author-tz'});
5425                         my $date = $date{'iso-tz'};
5426                         if ($group_size) {
5427                                 $current_color = ($current_color + 1) % $num_colors;
5428                         }
5429                         my $tr_class = $rev_color[$current_color];
5430                         $tr_class .= ' boundary' if (exists $meta->{'boundary'});
5431                         $tr_class .= ' no-previous' if ($meta->{'nprevious'} == 0);
5432                         $tr_class .= ' multiple-previous' if ($meta->{'nprevious'} > 1);
5433                         print "<tr id=\"l$lineno\" class=\"$tr_class\">\n";
5434                         if ($group_size) {
5435                                 print "<td class=\"sha1\"";
5436                                 print " title=\"". esc_html($author) . ", $date\"";
5437                                 print " rowspan=\"$group_size\"" if ($group_size > 1);
5438                                 print ">";
5439                                 print $cgi->a({-href => href(action=>"commit",
5440                                                              hash=>$full_rev,
5441                                                              file_name=>$file_name)},
5442                                               esc_html($short_rev));
5443                                 if ($group_size >= 2) {
5444                                         my @author_initials = ($author =~ /\b([[:upper:]])\B/g);
5445                                         if (@author_initials) {
5446                                                 print "<br />" .
5447                                                       esc_html(join('', @author_initials));
5448                                                 #           or join('.', ...)
5449                                         }
5450                                 }
5451                                 print "</td>\n";
5452                         }
5453                         # 'previous' <sha1 of parent commit> <filename at commit>
5454                         if (exists $meta->{'previous'} &&
5455                             $meta->{'previous'} =~ /^([a-fA-F0-9]{40}) (.*)$/) {
5456                                 $meta->{'parent'} = $1;
5457                                 $meta->{'file_parent'} = unquote($2);
5458                         }
5459                         my $linenr_commit =
5460                                 exists($meta->{'parent'}) ?
5461                                 $meta->{'parent'} : $full_rev;
5462                         my $linenr_filename =
5463                                 exists($meta->{'file_parent'}) ?
5464                                 $meta->{'file_parent'} : unquote($meta->{'filename'});
5465                         my $blamed = href(action => 'blame',
5466                                           file_name => $linenr_filename,
5467                                           hash_base => $linenr_commit);
5468                         print "<td class=\"linenr\">";
5469                         print $cgi->a({ -href => "$blamed#l$orig_lineno",
5470                                         -class => "linenr" },
5471                                       esc_html($lineno));
5472                         print "</td>";
5473                         print "<td class=\"pre\">" . esc_html($data) . "</td>\n";
5474                         print "</tr>\n";
5475                 } # end while
5476
5477         }
5478
5479         # footer
5480         print "</tbody>\n".
5481               "</table>\n"; # class="blame"
5482         print "</div>\n";   # class="blame_body"
5483         close $fd
5484                 or print "Reading blob failed\n";
5485
5486         git_footer_html();
5487 }
5488
5489 sub git_blame {
5490         git_blame_common();
5491 }
5492
5493 sub git_blame_incremental {
5494         git_blame_common('incremental');
5495 }
5496
5497 sub git_blame_data {
5498         git_blame_common('data');
5499 }
5500
5501 sub git_tags {
5502         my $head = git_get_head_hash($project);
5503         git_header_html();
5504         git_print_page_nav('','', $head,undef,$head);
5505         git_print_header_div('summary', $project);
5506
5507         my @tagslist = git_get_tags_list();
5508         if (@tagslist) {
5509                 git_tags_body(\@tagslist);
5510         }
5511         git_footer_html();
5512 }
5513
5514 sub git_heads {
5515         my $head = git_get_head_hash($project);
5516         git_header_html();
5517         git_print_page_nav('','', $head,undef,$head);
5518         git_print_header_div('summary', $project);
5519
5520         my @headslist = git_get_heads_list();
5521         if (@headslist) {
5522                 git_heads_body(\@headslist, $head);
5523         }
5524         git_footer_html();
5525 }
5526
5527 sub git_blob_plain {
5528         my $type = shift;
5529         my $expires;
5530
5531         if (!defined $hash) {
5532                 if (defined $file_name) {
5533                         my $base = $hash_base || git_get_head_hash($project);
5534                         $hash = git_get_hash_by_path($base, $file_name, "blob")
5535                                 or die_error(404, "Cannot find file");
5536                 } else {
5537                         die_error(400, "No file name defined");
5538                 }
5539         } elsif ($hash =~ m/^[0-9a-fA-F]{40}$/) {
5540                 # blobs defined by non-textual hash id's can be cached
5541                 $expires = "+1d";
5542         }
5543
5544         open my $fd, "-|", git_cmd(), "cat-file", "blob", $hash
5545                 or die_error(500, "Open git-cat-file blob '$hash' failed");
5546
5547         # content-type (can include charset)
5548         $type = blob_contenttype($fd, $file_name, $type);
5549
5550         # "save as" filename, even when no $file_name is given
5551         my $save_as = "$hash";
5552         if (defined $file_name) {
5553                 $save_as = $file_name;
5554         } elsif ($type =~ m/^text\//) {
5555                 $save_as .= '.txt';
5556         }
5557
5558         # With XSS prevention on, blobs of all types except a few known safe
5559         # ones are served with "Content-Disposition: attachment" to make sure
5560         # they don't run in our security domain.  For certain image types,
5561         # blob view writes an <img> tag referring to blob_plain view, and we
5562         # want to be sure not to break that by serving the image as an
5563         # attachment (though Firefox 3 doesn't seem to care).
5564         my $sandbox = $prevent_xss &&
5565                 $type !~ m!^(?:text/plain|image/(?:gif|png|jpeg))$!;
5566
5567         print $cgi->header(
5568                 -type => $type,
5569                 -expires => $expires,
5570                 -content_disposition =>
5571                         ($sandbox ? 'attachment' : 'inline')
5572                         . '; filename="' . $save_as . '"');
5573         local $/ = undef;
5574         binmode STDOUT, ':raw';
5575         print <$fd>;
5576         binmode STDOUT, ':utf8'; # as set at the beginning of gitweb.cgi
5577         close $fd;
5578 }
5579
5580 sub git_blob {
5581         my $expires;
5582
5583         if (!defined $hash) {
5584                 if (defined $file_name) {
5585                         my $base = $hash_base || git_get_head_hash($project);
5586                         $hash = git_get_hash_by_path($base, $file_name, "blob")
5587                                 or die_error(404, "Cannot find file");
5588                 } else {
5589                         die_error(400, "No file name defined");
5590                 }
5591         } elsif ($hash =~ m/^[0-9a-fA-F]{40}$/) {
5592                 # blobs defined by non-textual hash id's can be cached
5593                 $expires = "+1d";
5594         }
5595
5596         my $have_blame = gitweb_check_feature('blame');
5597         open my $fd, "-|", git_cmd(), "cat-file", "blob", $hash
5598                 or die_error(500, "Couldn't cat $file_name, $hash");
5599         my $mimetype = blob_mimetype($fd, $file_name);
5600         # use 'blob_plain' (aka 'raw') view for files that cannot be displayed
5601         if ($mimetype !~ m!^(?:text/|image/(?:gif|png|jpeg)$)! && -B $fd) {
5602                 close $fd;
5603                 return git_blob_plain($mimetype);
5604         }
5605         # we can have blame only for text/* mimetype
5606         $have_blame &&= ($mimetype =~ m!^text/!);
5607
5608         my $highlight = gitweb_check_feature('highlight');
5609         my $syntax = guess_file_syntax($highlight, $mimetype, $file_name);
5610         $fd = run_highlighter($fd, $highlight, $syntax)
5611                 if $syntax;
5612
5613         git_header_html(undef, $expires);
5614         my $formats_nav = '';
5615         if (defined $hash_base && (my %co = parse_commit($hash_base))) {
5616                 if (defined $file_name) {
5617                         if ($have_blame) {
5618                                 $formats_nav .=
5619                                         $cgi->a({-href => href(action=>"blame", -replay=>1)},
5620                                                 "blame") .
5621                                         " | ";
5622                         }
5623                         $formats_nav .=
5624                                 $cgi->a({-href => href(action=>"history", -replay=>1)},
5625                                         "history") .
5626                                 " | " .
5627                                 $cgi->a({-href => href(action=>"blob_plain", -replay=>1)},
5628                                         "raw") .
5629                                 " | " .
5630                                 $cgi->a({-href => href(action=>"blob",
5631                                                        hash_base=>"HEAD", file_name=>$file_name)},
5632                                         "HEAD");
5633                 } else {
5634                         $formats_nav .=
5635                                 $cgi->a({-href => href(action=>"blob_plain", -replay=>1)},
5636                                         "raw");
5637                 }
5638                 git_print_page_nav('','', $hash_base,$co{'tree'},$hash_base, $formats_nav);
5639                 git_print_header_div('commit', esc_html($co{'title'}), $hash_base);
5640         } else {
5641                 print "<div class=\"page_nav\">\n" .
5642                       "<br/><br/></div>\n" .
5643                       "<div class=\"title\">$hash</div>\n";
5644         }
5645         git_print_page_path($file_name, "blob", $hash_base);
5646         print "<div class=\"page_body\">\n";
5647         if ($mimetype =~ m!^image/!) {
5648                 print qq!<img type="$mimetype"!;
5649                 if ($file_name) {
5650                         print qq! alt="$file_name" title="$file_name"!;
5651                 }
5652                 print qq! src="! .
5653                       href(action=>"blob_plain", hash=>$hash,
5654                            hash_base=>$hash_base, file_name=>$file_name) .
5655                       qq!" />\n!;
5656         } else {
5657                 my $nr;
5658                 while (my $line = <$fd>) {
5659                         chomp $line;
5660                         $nr++;
5661                         $line = untabify($line);
5662                         printf qq!<div class="pre"><a id="l%i" href="%s#l%i" class="linenr">%4i</a> %s</div>\n!,
5663                                $nr, href(-replay => 1), $nr, $nr, $syntax ? $line : esc_html($line, -nbsp=>1);
5664                 }
5665         }
5666         close $fd
5667                 or print "Reading blob failed.\n";
5668         print "</div>";
5669         git_footer_html();
5670 }
5671
5672 sub git_tree {
5673         if (!defined $hash_base) {
5674                 $hash_base = "HEAD";
5675         }
5676         if (!defined $hash) {
5677                 if (defined $file_name) {
5678                         $hash = git_get_hash_by_path($hash_base, $file_name, "tree");
5679                 } else {
5680                         $hash = $hash_base;
5681                 }
5682         }
5683         die_error(404, "No such tree") unless defined($hash);
5684
5685         my $show_sizes = gitweb_check_feature('show-sizes');
5686         my $have_blame = gitweb_check_feature('blame');
5687
5688         my @entries = ();
5689         {
5690                 local $/ = "\0";
5691                 open my $fd, "-|", git_cmd(), "ls-tree", '-z',
5692                         ($show_sizes ? '-l' : ()), @extra_options, $hash
5693                         or die_error(500, "Open git-ls-tree failed");
5694                 @entries = map { chomp; $_ } <$fd>;
5695                 close $fd
5696                         or die_error(404, "Reading tree failed");
5697         }
5698
5699         my $refs = git_get_references();
5700         my $ref = format_ref_marker($refs, $hash_base);
5701         git_header_html();
5702         my $basedir = '';
5703         if (defined $hash_base && (my %co = parse_commit($hash_base))) {
5704                 my @views_nav = ();
5705                 if (defined $file_name) {
5706                         push @views_nav,
5707                                 $cgi->a({-href => href(action=>"history", -replay=>1)},
5708                                         "history"),
5709                                 $cgi->a({-href => href(action=>"tree",
5710                                                        hash_base=>"HEAD", file_name=>$file_name)},
5711                                         "HEAD"),
5712                 }
5713                 my $snapshot_links = format_snapshot_links($hash);
5714                 if (defined $snapshot_links) {
5715                         # FIXME: Should be available when we have no hash base as well.
5716                         push @views_nav, $snapshot_links;
5717                 }
5718                 git_print_page_nav('tree','', $hash_base, undef, undef,
5719                                    join(' | ', @views_nav));
5720                 git_print_header_div('commit', esc_html($co{'title'}) . $ref, $hash_base);
5721         } else {
5722                 undef $hash_base;
5723                 print "<div class=\"page_nav\">\n";
5724                 print "<br/><br/></div>\n";
5725                 print "<div class=\"title\">$hash</div>\n";
5726         }
5727         if (defined $file_name) {
5728                 $basedir = $file_name;
5729                 if ($basedir ne '' && substr($basedir, -1) ne '/') {
5730                         $basedir .= '/';
5731                 }
5732                 git_print_page_path($file_name, 'tree', $hash_base);
5733         }
5734         print "<div class=\"page_body\">\n";
5735         print "<table class=\"tree\">\n";
5736         my $alternate = 1;
5737         # '..' (top directory) link if possible
5738         if (defined $hash_base &&
5739             defined $file_name && $file_name =~ m![^/]+$!) {
5740                 if ($alternate) {
5741                         print "<tr class=\"dark\">\n";
5742                 } else {
5743                         print "<tr class=\"light\">\n";
5744                 }
5745                 $alternate ^= 1;
5746
5747                 my $up = $file_name;
5748                 $up =~ s!/?[^/]+$!!;
5749                 undef $up unless $up;
5750                 # based on git_print_tree_entry
5751                 print '<td class="mode">' . mode_str('040000') . "</td>\n";
5752                 print '<td class="size">&nbsp;</td>'."\n" if $show_sizes;
5753                 print '<td class="list">';
5754                 print $cgi->a({-href => href(action=>"tree",
5755                                              hash_base=>$hash_base,
5756                                              file_name=>$up)},
5757                               "..");
5758                 print "</td>\n";
5759                 print "<td class=\"link\"></td>\n";
5760
5761                 print "</tr>\n";
5762         }
5763         foreach my $line (@entries) {
5764                 my %t = parse_ls_tree_line($line, -z => 1, -l => $show_sizes);
5765
5766                 if ($alternate) {
5767                         print "<tr class=\"dark\">\n";
5768                 } else {
5769                         print "<tr class=\"light\">\n";
5770                 }
5771                 $alternate ^= 1;
5772
5773                 git_print_tree_entry(\%t, $basedir, $hash_base, $have_blame);
5774
5775                 print "</tr>\n";
5776         }
5777         print "</table>\n" .
5778               "</div>";
5779         git_footer_html();
5780 }
5781
5782 sub snapshot_name {
5783         my ($project, $hash) = @_;
5784
5785         # path/to/project.git  -> project
5786         # path/to/project/.git -> project
5787         my $name = to_utf8($project);
5788         $name =~ s,([^/])/*\.git$,$1,;
5789         $name = basename($name);
5790         # sanitize name
5791         $name =~ s/[[:cntrl:]]/?/g;
5792
5793         my $ver = $hash;
5794         if ($hash =~ /^[0-9a-fA-F]+$/) {
5795                 # shorten SHA-1 hash
5796                 my $full_hash = git_get_full_hash($project, $hash);
5797                 if ($full_hash =~ /^$hash/ && length($hash) > 7) {
5798                         $ver = git_get_short_hash($project, $hash);
5799                 }
5800         } elsif ($hash =~ m!^refs/tags/(.*)$!) {
5801                 # tags don't need shortened SHA-1 hash
5802                 $ver = $1;
5803         } else {
5804                 # branches and other need shortened SHA-1 hash
5805                 if ($hash =~ m!^refs/(?:heads|remotes)/(.*)$!) {
5806                         $ver = $1;
5807                 }
5808                 $ver .= '-' . git_get_short_hash($project, $hash);
5809         }
5810         # in case of hierarchical branch names
5811         $ver =~ s!/!.!g;
5812
5813         # name = project-version_string
5814         $name = "$name-$ver";
5815
5816         return wantarray ? ($name, $name) : $name;
5817 }
5818
5819 sub git_snapshot {
5820         my $format = $input_params{'snapshot_format'};
5821         if (!@snapshot_fmts) {
5822                 die_error(403, "Snapshots not allowed");
5823         }
5824         # default to first supported snapshot format
5825         $format ||= $snapshot_fmts[0];
5826         if ($format !~ m/^[a-z0-9]+$/) {
5827                 die_error(400, "Invalid snapshot format parameter");
5828         } elsif (!exists($known_snapshot_formats{$format})) {
5829                 die_error(400, "Unknown snapshot format");
5830         } elsif ($known_snapshot_formats{$format}{'disabled'}) {
5831                 die_error(403, "Snapshot format not allowed");
5832         } elsif (!grep($_ eq $format, @snapshot_fmts)) {
5833                 die_error(403, "Unsupported snapshot format");
5834         }
5835
5836         my $type = git_get_type("$hash^{}");
5837         if (!$type) {
5838                 die_error(404, 'Object does not exist');
5839         }  elsif ($type eq 'blob') {
5840                 die_error(400, 'Object is not a tree-ish');
5841         }
5842
5843         my ($name, $prefix) = snapshot_name($project, $hash);
5844         my $filename = "$name$known_snapshot_formats{$format}{'suffix'}";
5845         my $cmd = quote_command(
5846                 git_cmd(), 'archive',
5847                 "--format=$known_snapshot_formats{$format}{'format'}",
5848                 "--prefix=$prefix/", $hash);
5849         if (exists $known_snapshot_formats{$format}{'compressor'}) {
5850                 $cmd .= ' | ' . quote_command(@{$known_snapshot_formats{$format}{'compressor'}});
5851         }
5852
5853         $filename =~ s/(["\\])/\\$1/g;
5854         print $cgi->header(
5855                 -type => $known_snapshot_formats{$format}{'type'},
5856                 -content_disposition => 'inline; filename="' . $filename . '"',
5857                 -status => '200 OK');
5858
5859         open my $fd, "-|", $cmd
5860                 or die_error(500, "Execute git-archive failed");
5861         binmode STDOUT, ':raw';
5862         print <$fd>;
5863         binmode STDOUT, ':utf8'; # as set at the beginning of gitweb.cgi
5864         close $fd;
5865 }
5866
5867 sub git_log_generic {
5868         my ($fmt_name, $body_subr, $base, $parent, $file_name, $file_hash) = @_;
5869
5870         my $head = git_get_head_hash($project);
5871         if (!defined $base) {
5872                 $base = $head;
5873         }
5874         if (!defined $page) {
5875                 $page = 0;
5876         }
5877         my $refs = git_get_references();
5878
5879         my $commit_hash = $base;
5880         if (defined $parent) {
5881                 $commit_hash = "$parent..$base";
5882         }
5883         my @commitlist =
5884                 parse_commits($commit_hash, 101, (100 * $page),
5885                               defined $file_name ? ($file_name, "--full-history") : ());
5886
5887         my $ftype;
5888         if (!defined $file_hash && defined $file_name) {
5889                 # some commits could have deleted file in question,
5890                 # and not have it in tree, but one of them has to have it
5891                 for (my $i = 0; $i < @commitlist; $i++) {
5892                         $file_hash = git_get_hash_by_path($commitlist[$i]{'id'}, $file_name);
5893                         last if defined $file_hash;
5894                 }
5895         }
5896         if (defined $file_hash) {
5897                 $ftype = git_get_type($file_hash);
5898         }
5899         if (defined $file_name && !defined $ftype) {
5900                 die_error(500, "Unknown type of object");
5901         }
5902         my %co;
5903         if (defined $file_name) {
5904                 %co = parse_commit($base)
5905                         or die_error(404, "Unknown commit object");
5906         }
5907
5908
5909         my $paging_nav = format_paging_nav($fmt_name, $page, $#commitlist >= 100);
5910         my $next_link = '';
5911         if ($#commitlist >= 100) {
5912                 $next_link =
5913                         $cgi->a({-href => href(-replay=>1, page=>$page+1),
5914                                  -accesskey => "n", -title => "Alt-n"}, "next");
5915         }
5916         my $patch_max = gitweb_get_feature('patches');
5917         if ($patch_max && !defined $file_name) {
5918                 if ($patch_max < 0 || @commitlist <= $patch_max) {
5919                         $paging_nav .= " &sdot; " .
5920                                 $cgi->a({-href => href(action=>"patches", -replay=>1)},
5921                                         "patches");
5922                 }
5923         }
5924
5925         git_header_html();
5926         git_print_page_nav($fmt_name,'', $hash,$hash,$hash, $paging_nav);
5927         if (defined $file_name) {
5928                 git_print_header_div('commit', esc_html($co{'title'}), $base);
5929         } else {
5930                 git_print_header_div('summary', $project)
5931         }
5932         git_print_page_path($file_name, $ftype, $hash_base)
5933                 if (defined $file_name);
5934
5935         $body_subr->(\@commitlist, 0, 99, $refs, $next_link,
5936                      $file_name, $file_hash, $ftype);
5937
5938         git_footer_html();
5939 }
5940
5941 sub git_log {
5942         git_log_generic('log', \&git_log_body,
5943                         $hash, $hash_parent);
5944 }
5945
5946 sub git_commit {
5947         $hash ||= $hash_base || "HEAD";
5948         my %co = parse_commit($hash)
5949             or die_error(404, "Unknown commit object");
5950
5951         my $parent  = $co{'parent'};
5952         my $parents = $co{'parents'}; # listref
5953
5954         # we need to prepare $formats_nav before any parameter munging
5955         my $formats_nav;
5956         if (!defined $parent) {
5957                 # --root commitdiff
5958                 $formats_nav .= '(initial)';
5959         } elsif (@$parents == 1) {
5960                 # single parent commit
5961                 $formats_nav .=
5962                         '(parent: ' .
5963                         $cgi->a({-href => href(action=>"commit",
5964                                                hash=>$parent)},
5965                                 esc_html(substr($parent, 0, 7))) .
5966                         ')';
5967         } else {
5968                 # merge commit
5969                 $formats_nav .=
5970                         '(merge: ' .
5971                         join(' ', map {
5972                                 $cgi->a({-href => href(action=>"commit",
5973                                                        hash=>$_)},
5974                                         esc_html(substr($_, 0, 7)));
5975                         } @$parents ) .
5976                         ')';
5977         }
5978         if (gitweb_check_feature('patches') && @$parents <= 1) {
5979                 $formats_nav .= " | " .
5980                         $cgi->a({-href => href(action=>"patch", -replay=>1)},
5981                                 "patch");
5982         }
5983
5984         if (!defined $parent) {
5985                 $parent = "--root";
5986         }
5987         my @difftree;
5988         open my $fd, "-|", git_cmd(), "diff-tree", '-r', "--no-commit-id",
5989                 @diff_opts,
5990                 (@$parents <= 1 ? $parent : '-c'),
5991                 $hash, "--"
5992                 or die_error(500, "Open git-diff-tree failed");
5993         @difftree = map { chomp; $_ } <$fd>;
5994         close $fd or die_error(404, "Reading git-diff-tree failed");
5995
5996         # non-textual hash id's can be cached
5997         my $expires;
5998         if ($hash =~ m/^[0-9a-fA-F]{40}$/) {
5999                 $expires = "+1d";
6000         }
6001         my $refs = git_get_references();
6002         my $ref = format_ref_marker($refs, $co{'id'});
6003
6004         git_header_html(undef, $expires);
6005         git_print_page_nav('commit', '',
6006                            $hash, $co{'tree'}, $hash,
6007                            $formats_nav);
6008
6009         if (defined $co{'parent'}) {
6010                 git_print_header_div('commitdiff', esc_html($co{'title'}) . $ref, $hash);
6011         } else {
6012                 git_print_header_div('tree', esc_html($co{'title'}) . $ref, $co{'tree'}, $hash);
6013         }
6014         print "<div class=\"title_text\">\n" .
6015               "<table class=\"object_header\">\n";
6016         git_print_authorship_rows(\%co);
6017         print "<tr><td>commit</td><td class=\"sha1\">$co{'id'}</td></tr>\n";
6018         print "<tr>" .
6019               "<td>tree</td>" .
6020               "<td class=\"sha1\">" .
6021               $cgi->a({-href => href(action=>"tree", hash=>$co{'tree'}, hash_base=>$hash),
6022                        class => "list"}, $co{'tree'}) .
6023               "</td>" .
6024               "<td class=\"link\">" .
6025               $cgi->a({-href => href(action=>"tree", hash=>$co{'tree'}, hash_base=>$hash)},
6026                       "tree");
6027         my $snapshot_links = format_snapshot_links($hash);
6028         if (defined $snapshot_links) {
6029                 print " | " . $snapshot_links;
6030         }
6031         print "</td>" .
6032               "</tr>\n";
6033
6034         foreach my $par (@$parents) {
6035                 print "<tr>" .
6036                       "<td>parent</td>" .
6037                       "<td class=\"sha1\">" .
6038                       $cgi->a({-href => href(action=>"commit", hash=>$par),
6039                                class => "list"}, $par) .
6040                       "</td>" .
6041                       "<td class=\"link\">" .
6042                       $cgi->a({-href => href(action=>"commit", hash=>$par)}, "commit") .
6043                       " | " .
6044                       $cgi->a({-href => href(action=>"commitdiff", hash=>$hash, hash_parent=>$par)}, "diff") .
6045                       "</td>" .
6046                       "</tr>\n";
6047         }
6048         print "</table>".
6049               "</div>\n";
6050
6051         print "<div class=\"page_body\">\n";
6052         git_print_log($co{'comment'});
6053         print "</div>\n";
6054
6055         git_difftree_body(\@difftree, $hash, @$parents);
6056
6057         git_footer_html();
6058 }
6059
6060 sub git_object {
6061         # object is defined by:
6062         # - hash or hash_base alone
6063         # - hash_base and file_name
6064         my $type;
6065
6066         # - hash or hash_base alone
6067         if ($hash || ($hash_base && !defined $file_name)) {
6068                 my $object_id = $hash || $hash_base;
6069
6070                 open my $fd, "-|", quote_command(
6071                         git_cmd(), 'cat-file', '-t', $object_id) . ' 2> /dev/null'
6072                         or die_error(404, "Object does not exist");
6073                 $type = <$fd>;
6074                 chomp $type;
6075                 close $fd
6076                         or die_error(404, "Object does not exist");
6077
6078         # - hash_base and file_name
6079         } elsif ($hash_base && defined $file_name) {
6080                 $file_name =~ s,/+$,,;
6081
6082                 system(git_cmd(), "cat-file", '-e', $hash_base) == 0
6083                         or die_error(404, "Base object does not exist");
6084
6085                 # here errors should not hapen
6086                 open my $fd, "-|", git_cmd(), "ls-tree", $hash_base, "--", $file_name
6087                         or die_error(500, "Open git-ls-tree failed");
6088                 my $line = <$fd>;
6089                 close $fd;
6090
6091                 #'100644 blob 0fa3f3a66fb6a137f6ec2c19351ed4d807070ffa  panic.c'
6092                 unless ($line && $line =~ m/^([0-9]+) (.+) ([0-9a-fA-F]{40})\t/) {
6093                         die_error(404, "File or directory for given base does not exist");
6094                 }
6095                 $type = $2;
6096                 $hash = $3;
6097         } else {
6098                 die_error(400, "Not enough information to find object");
6099         }
6100
6101         print $cgi->redirect(-uri => href(action=>$type, -full=>1,
6102                                           hash=>$hash, hash_base=>$hash_base,
6103                                           file_name=>$file_name),
6104                              -status => '302 Found');
6105 }
6106
6107 sub git_blobdiff {
6108         my $format = shift || 'html';
6109
6110         my $fd;
6111         my @difftree;
6112         my %diffinfo;
6113         my $expires;
6114
6115         # preparing $fd and %diffinfo for git_patchset_body
6116         # new style URI
6117         if (defined $hash_base && defined $hash_parent_base) {
6118                 if (defined $file_name) {
6119                         # read raw output
6120                         open $fd, "-|", git_cmd(), "diff-tree", '-r', @diff_opts,
6121                                 $hash_parent_base, $hash_base,
6122                                 "--", (defined $file_parent ? $file_parent : ()), $file_name
6123                                 or die_error(500, "Open git-diff-tree failed");
6124                         @difftree = map { chomp; $_ } <$fd>;
6125                         close $fd
6126                                 or die_error(404, "Reading git-diff-tree failed");
6127                         @difftree
6128                                 or die_error(404, "Blob diff not found");
6129
6130                 } elsif (defined $hash &&
6131                          $hash =~ /[0-9a-fA-F]{40}/) {
6132                         # try to find filename from $hash
6133
6134                         # read filtered raw output
6135                         open $fd, "-|", git_cmd(), "diff-tree", '-r', @diff_opts,
6136                                 $hash_parent_base, $hash_base, "--"
6137                                 or die_error(500, "Open git-diff-tree failed");
6138                         @difftree =
6139                                 # ':100644 100644 03b21826... 3b93d5e7... M     ls-files.c'
6140                                 # $hash == to_id
6141                                 grep { /^:[0-7]{6} [0-7]{6} [0-9a-fA-F]{40} $hash/ }
6142                                 map { chomp; $_ } <$fd>;
6143                         close $fd
6144                                 or die_error(404, "Reading git-diff-tree failed");
6145                         @difftree
6146                                 or die_error(404, "Blob diff not found");
6147
6148                 } else {
6149                         die_error(400, "Missing one of the blob diff parameters");
6150                 }
6151
6152                 if (@difftree > 1) {
6153                         die_error(400, "Ambiguous blob diff specification");
6154                 }
6155
6156                 %diffinfo = parse_difftree_raw_line($difftree[0]);
6157                 $file_parent ||= $diffinfo{'from_file'} || $file_name;
6158                 $file_name   ||= $diffinfo{'to_file'};
6159
6160                 $hash_parent ||= $diffinfo{'from_id'};
6161                 $hash        ||= $diffinfo{'to_id'};
6162
6163                 # non-textual hash id's can be cached
6164                 if ($hash_base =~ m/^[0-9a-fA-F]{40}$/ &&
6165                     $hash_parent_base =~ m/^[0-9a-fA-F]{40}$/) {
6166                         $expires = '+1d';
6167                 }
6168
6169                 # open patch output
6170                 open $fd, "-|", git_cmd(), "diff-tree", '-r', @diff_opts,
6171                         '-p', ($format eq 'html' ? "--full-index" : ()),
6172                         $hash_parent_base, $hash_base,
6173                         "--", (defined $file_parent ? $file_parent : ()), $file_name
6174                         or die_error(500, "Open git-diff-tree failed");
6175         }
6176
6177         # old/legacy style URI -- not generated anymore since 1.4.3.
6178         if (!%diffinfo) {
6179                 die_error('404 Not Found', "Missing one of the blob diff parameters")
6180         }
6181
6182         # header
6183         if ($format eq 'html') {
6184                 my $formats_nav =
6185                         $cgi->a({-href => href(action=>"blobdiff_plain", -replay=>1)},
6186                                 "raw");
6187                 git_header_html(undef, $expires);
6188                 if (defined $hash_base && (my %co = parse_commit($hash_base))) {
6189                         git_print_page_nav('','', $hash_base,$co{'tree'},$hash_base, $formats_nav);
6190                         git_print_header_div('commit', esc_html($co{'title'}), $hash_base);
6191                 } else {
6192                         print "<div class=\"page_nav\"><br/>$formats_nav<br/></div>\n";
6193                         print "<div class=\"title\">$hash vs $hash_parent</div>\n";
6194                 }
6195                 if (defined $file_name) {
6196                         git_print_page_path($file_name, "blob", $hash_base);
6197                 } else {
6198                         print "<div class=\"page_path\"></div>\n";
6199                 }
6200
6201         } elsif ($format eq 'plain') {
6202                 print $cgi->header(
6203                         -type => 'text/plain',
6204                         -charset => 'utf-8',
6205                         -expires => $expires,
6206                         -content_disposition => 'inline; filename="' . "$file_name" . '.patch"');
6207
6208                 print "X-Git-Url: " . $cgi->self_url() . "\n\n";
6209
6210         } else {
6211                 die_error(400, "Unknown blobdiff format");
6212         }
6213
6214         # patch
6215         if ($format eq 'html') {
6216                 print "<div class=\"page_body\">\n";
6217
6218                 git_patchset_body($fd, [ \%diffinfo ], $hash_base, $hash_parent_base);
6219                 close $fd;
6220
6221                 print "</div>\n"; # class="page_body"
6222                 git_footer_html();
6223
6224         } else {
6225                 while (my $line = <$fd>) {
6226                         $line =~ s!a/($hash|$hash_parent)!'a/'.esc_path($diffinfo{'from_file'})!eg;
6227                         $line =~ s!b/($hash|$hash_parent)!'b/'.esc_path($diffinfo{'to_file'})!eg;
6228
6229                         print $line;
6230
6231                         last if $line =~ m!^\+\+\+!;
6232                 }
6233                 local $/ = undef;
6234                 print <$fd>;
6235                 close $fd;
6236         }
6237 }
6238
6239 sub git_blobdiff_plain {
6240         git_blobdiff('plain');
6241 }
6242
6243 sub git_commitdiff {
6244         my %params = @_;
6245         my $format = $params{-format} || 'html';
6246
6247         my ($patch_max) = gitweb_get_feature('patches');
6248         if ($format eq 'patch') {
6249                 die_error(403, "Patch view not allowed") unless $patch_max;
6250         }
6251
6252         $hash ||= $hash_base || "HEAD";
6253         my %co = parse_commit($hash)
6254             or die_error(404, "Unknown commit object");
6255
6256         # choose format for commitdiff for merge
6257         if (! defined $hash_parent && @{$co{'parents'}} > 1) {
6258                 $hash_parent = '--cc';
6259         }
6260         # we need to prepare $formats_nav before almost any parameter munging
6261         my $formats_nav;
6262         if ($format eq 'html') {
6263                 $formats_nav =
6264                         $cgi->a({-href => href(action=>"commitdiff_plain", -replay=>1)},
6265                                 "raw");
6266                 if ($patch_max && @{$co{'parents'}} <= 1) {
6267                         $formats_nav .= " | " .
6268                                 $cgi->a({-href => href(action=>"patch", -replay=>1)},
6269                                         "patch");
6270                 }
6271
6272                 if (defined $hash_parent &&
6273                     $hash_parent ne '-c' && $hash_parent ne '--cc') {
6274                         # commitdiff with two commits given
6275                         my $hash_parent_short = $hash_parent;
6276                         if ($hash_parent =~ m/^[0-9a-fA-F]{40}$/) {
6277                                 $hash_parent_short = substr($hash_parent, 0, 7);
6278                         }
6279                         $formats_nav .=
6280                                 ' (from';
6281                         for (my $i = 0; $i < @{$co{'parents'}}; $i++) {
6282                                 if ($co{'parents'}[$i] eq $hash_parent) {
6283                                         $formats_nav .= ' parent ' . ($i+1);
6284                                         last;
6285                                 }
6286                         }
6287                         $formats_nav .= ': ' .
6288                                 $cgi->a({-href => href(action=>"commitdiff",
6289                                                        hash=>$hash_parent)},
6290                                         esc_html($hash_parent_short)) .
6291                                 ')';
6292                 } elsif (!$co{'parent'}) {
6293                         # --root commitdiff
6294                         $formats_nav .= ' (initial)';
6295                 } elsif (scalar @{$co{'parents'}} == 1) {
6296                         # single parent commit
6297                         $formats_nav .=
6298                                 ' (parent: ' .
6299                                 $cgi->a({-href => href(action=>"commitdiff",
6300                                                        hash=>$co{'parent'})},
6301                                         esc_html(substr($co{'parent'}, 0, 7))) .
6302                                 ')';
6303                 } else {
6304                         # merge commit
6305                         if ($hash_parent eq '--cc') {
6306                                 $formats_nav .= ' | ' .
6307                                         $cgi->a({-href => href(action=>"commitdiff",
6308                                                                hash=>$hash, hash_parent=>'-c')},
6309                                                 'combined');
6310                         } else { # $hash_parent eq '-c'
6311                                 $formats_nav .= ' | ' .
6312                                         $cgi->a({-href => href(action=>"commitdiff",
6313                                                                hash=>$hash, hash_parent=>'--cc')},
6314                                                 'compact');
6315                         }
6316                         $formats_nav .=
6317                                 ' (merge: ' .
6318                                 join(' ', map {
6319                                         $cgi->a({-href => href(action=>"commitdiff",
6320                                                                hash=>$_)},
6321                                                 esc_html(substr($_, 0, 7)));
6322                                 } @{$co{'parents'}} ) .
6323                                 ')';
6324                 }
6325         }
6326
6327         my $hash_parent_param = $hash_parent;
6328         if (!defined $hash_parent_param) {
6329                 # --cc for multiple parents, --root for parentless
6330                 $hash_parent_param =
6331                         @{$co{'parents'}} > 1 ? '--cc' : $co{'parent'} || '--root';
6332         }
6333
6334         # read commitdiff
6335         my $fd;
6336         my @difftree;
6337         if ($format eq 'html') {
6338                 open $fd, "-|", git_cmd(), "diff-tree", '-r', @diff_opts,
6339                         "--no-commit-id", "--patch-with-raw", "--full-index",
6340                         $hash_parent_param, $hash, "--"
6341                         or die_error(500, "Open git-diff-tree failed");
6342
6343                 while (my $line = <$fd>) {
6344                         chomp $line;
6345                         # empty line ends raw part of diff-tree output
6346                         last unless $line;
6347                         push @difftree, scalar parse_difftree_raw_line($line);
6348                 }
6349
6350         } elsif ($format eq 'plain') {
6351                 open $fd, "-|", git_cmd(), "diff-tree", '-r', @diff_opts,
6352                         '-p', $hash_parent_param, $hash, "--"
6353                         or die_error(500, "Open git-diff-tree failed");
6354         } elsif ($format eq 'patch') {
6355                 # For commit ranges, we limit the output to the number of
6356                 # patches specified in the 'patches' feature.
6357                 # For single commits, we limit the output to a single patch,
6358                 # diverging from the git-format-patch default.
6359                 my @commit_spec = ();
6360                 if ($hash_parent) {
6361                         if ($patch_max > 0) {
6362                                 push @commit_spec, "-$patch_max";
6363                         }
6364                         push @commit_spec, '-n', "$hash_parent..$hash";
6365                 } else {
6366                         if ($params{-single}) {
6367                                 push @commit_spec, '-1';
6368                         } else {
6369                                 if ($patch_max > 0) {
6370                                         push @commit_spec, "-$patch_max";
6371                                 }
6372                                 push @commit_spec, "-n";
6373                         }
6374                         push @commit_spec, '--root', $hash;
6375                 }
6376                 open $fd, "-|", git_cmd(), "format-patch", @diff_opts,
6377                         '--encoding=utf8', '--stdout', @commit_spec
6378                         or die_error(500, "Open git-format-patch failed");
6379         } else {
6380                 die_error(400, "Unknown commitdiff format");
6381         }
6382
6383         # non-textual hash id's can be cached
6384         my $expires;
6385         if ($hash =~ m/^[0-9a-fA-F]{40}$/) {
6386                 $expires = "+1d";
6387         }
6388
6389         # write commit message
6390         if ($format eq 'html') {
6391                 my $refs = git_get_references();
6392                 my $ref = format_ref_marker($refs, $co{'id'});
6393
6394                 git_header_html(undef, $expires);
6395                 git_print_page_nav('commitdiff','', $hash,$co{'tree'},$hash, $formats_nav);
6396                 git_print_header_div('commit', esc_html($co{'title'}) . $ref, $hash);
6397                 print "<div class=\"title_text\">\n" .
6398                       "<table class=\"object_header\">\n";
6399                 git_print_authorship_rows(\%co);
6400                 print "</table>".
6401                       "</div>\n";
6402                 print "<div class=\"page_body\">\n";
6403                 if (@{$co{'comment'}} > 1) {
6404                         print "<div class=\"log\">\n";
6405                         git_print_log($co{'comment'}, -final_empty_line=> 1, -remove_title => 1);
6406                         print "</div>\n"; # class="log"
6407                 }
6408
6409         } elsif ($format eq 'plain') {
6410                 my $refs = git_get_references("tags");
6411                 my $tagname = git_get_rev_name_tags($hash);
6412                 my $filename = basename($project) . "-$hash.patch";
6413
6414                 print $cgi->header(
6415                         -type => 'text/plain',
6416                         -charset => 'utf-8',
6417                         -expires => $expires,
6418                         -content_disposition => 'inline; filename="' . "$filename" . '"');
6419                 my %ad = parse_date($co{'author_epoch'}, $co{'author_tz'});
6420                 print "From: " . to_utf8($co{'author'}) . "\n";
6421                 print "Date: $ad{'rfc2822'} ($ad{'tz_local'})\n";
6422                 print "Subject: " . to_utf8($co{'title'}) . "\n";
6423
6424                 print "X-Git-Tag: $tagname\n" if $tagname;
6425                 print "X-Git-Url: " . $cgi->self_url() . "\n\n";
6426
6427                 foreach my $line (@{$co{'comment'}}) {
6428                         print to_utf8($line) . "\n";
6429                 }
6430                 print "---\n\n";
6431         } elsif ($format eq 'patch') {
6432                 my $filename = basename($project) . "-$hash.patch";
6433
6434                 print $cgi->header(
6435                         -type => 'text/plain',
6436                         -charset => 'utf-8',
6437                         -expires => $expires,
6438                         -content_disposition => 'inline; filename="' . "$filename" . '"');
6439         }
6440
6441         # write patch
6442         if ($format eq 'html') {
6443                 my $use_parents = !defined $hash_parent ||
6444                         $hash_parent eq '-c' || $hash_parent eq '--cc';
6445                 git_difftree_body(\@difftree, $hash,
6446                                   $use_parents ? @{$co{'parents'}} : $hash_parent);
6447                 print "<br/>\n";
6448
6449                 git_patchset_body($fd, \@difftree, $hash,
6450                                   $use_parents ? @{$co{'parents'}} : $hash_parent);
6451                 close $fd;
6452                 print "</div>\n"; # class="page_body"
6453                 git_footer_html();
6454
6455         } elsif ($format eq 'plain') {
6456                 local $/ = undef;
6457                 print <$fd>;
6458                 close $fd
6459                         or print "Reading git-diff-tree failed\n";
6460         } elsif ($format eq 'patch') {
6461                 local $/ = undef;
6462                 print <$fd>;
6463                 close $fd
6464                         or print "Reading git-format-patch failed\n";
6465         }
6466 }
6467
6468 sub git_commitdiff_plain {
6469         git_commitdiff(-format => 'plain');
6470 }
6471
6472 # format-patch-style patches
6473 sub git_patch {
6474         git_commitdiff(-format => 'patch', -single => 1);
6475 }
6476
6477 sub git_patches {
6478         git_commitdiff(-format => 'patch');
6479 }
6480
6481 sub git_history {
6482         git_log_generic('history', \&git_history_body,
6483                         $hash_base, $hash_parent_base,
6484                         $file_name, $hash);
6485 }
6486
6487 sub git_search {
6488         gitweb_check_feature('search') or die_error(403, "Search is disabled");
6489         if (!defined $searchtext) {
6490                 die_error(400, "Text field is empty");
6491         }
6492         if (!defined $hash) {
6493                 $hash = git_get_head_hash($project);
6494         }
6495         my %co = parse_commit($hash);
6496         if (!%co) {
6497                 die_error(404, "Unknown commit object");
6498         }
6499         if (!defined $page) {
6500                 $page = 0;
6501         }
6502
6503         $searchtype ||= 'commit';
6504         if ($searchtype eq 'pickaxe') {
6505                 # pickaxe may take all resources of your box and run for several minutes
6506                 # with every query - so decide by yourself how public you make this feature
6507                 gitweb_check_feature('pickaxe')
6508                     or die_error(403, "Pickaxe is disabled");
6509         }
6510         if ($searchtype eq 'grep') {
6511                 gitweb_check_feature('grep')[0]
6512                     or die_error(403, "Grep is disabled");
6513         }
6514
6515         git_header_html();
6516
6517         if ($searchtype eq 'commit' or $searchtype eq 'author' or $searchtype eq 'committer') {
6518                 my $greptype;
6519                 if ($searchtype eq 'commit') {
6520                         $greptype = "--grep=";
6521                 } elsif ($searchtype eq 'author') {
6522                         $greptype = "--author=";
6523                 } elsif ($searchtype eq 'committer') {
6524                         $greptype = "--committer=";
6525                 }
6526                 $greptype .= $searchtext;
6527                 my @commitlist = parse_commits($hash, 101, (100 * $page), undef,
6528                                                $greptype, '--regexp-ignore-case',
6529                                                $search_use_regexp ? '--extended-regexp' : '--fixed-strings');
6530
6531                 my $paging_nav = '';
6532                 if ($page > 0) {
6533                         $paging_nav .=
6534                                 $cgi->a({-href => href(action=>"search", hash=>$hash,
6535                                                        searchtext=>$searchtext,
6536                                                        searchtype=>$searchtype)},
6537                                         "first");
6538                         $paging_nav .= " &sdot; " .
6539                                 $cgi->a({-href => href(-replay=>1, page=>$page-1),
6540                                          -accesskey => "p", -title => "Alt-p"}, "prev");
6541                 } else {
6542                         $paging_nav .= "first";
6543                         $paging_nav .= " &sdot; prev";
6544                 }
6545                 my $next_link = '';
6546                 if ($#commitlist >= 100) {
6547                         $next_link =
6548                                 $cgi->a({-href => href(-replay=>1, page=>$page+1),
6549                                          -accesskey => "n", -title => "Alt-n"}, "next");
6550                         $paging_nav .= " &sdot; $next_link";
6551                 } else {
6552                         $paging_nav .= " &sdot; next";
6553                 }
6554
6555                 git_print_page_nav('','', $hash,$co{'tree'},$hash, $paging_nav);
6556                 git_print_header_div('commit', esc_html($co{'title'}), $hash);
6557                 if ($page == 0 && !@commitlist) {
6558                         print "<p>No match.</p>\n";
6559                 } else {
6560                         git_search_grep_body(\@commitlist, 0, 99, $next_link);
6561                 }
6562         }
6563
6564         if ($searchtype eq 'pickaxe') {
6565                 git_print_page_nav('','', $hash,$co{'tree'},$hash);
6566                 git_print_header_div('commit', esc_html($co{'title'}), $hash);
6567
6568                 print "<table class=\"pickaxe search\">\n";
6569                 my $alternate = 1;
6570                 local $/ = "\n";
6571                 open my $fd, '-|', git_cmd(), '--no-pager', 'log', @diff_opts,
6572                         '--pretty=format:%H', '--no-abbrev', '--raw', "-S$searchtext",
6573                         ($search_use_regexp ? '--pickaxe-regex' : ());
6574                 undef %co;
6575                 my @files;
6576                 while (my $line = <$fd>) {
6577                         chomp $line;
6578                         next unless $line;
6579
6580                         my %set = parse_difftree_raw_line($line);
6581                         if (defined $set{'commit'}) {
6582                                 # finish previous commit
6583                                 if (%co) {
6584                                         print "</td>\n" .
6585                                               "<td class=\"link\">" .
6586                                               $cgi->a({-href => href(action=>"commit", hash=>$co{'id'})}, "commit") .
6587                                               " | " .
6588                                               $cgi->a({-href => href(action=>"tree", hash=>$co{'tree'}, hash_base=>$co{'id'})}, "tree");
6589                                         print "</td>\n" .
6590                                               "</tr>\n";
6591                                 }
6592
6593                                 if ($alternate) {
6594                                         print "<tr class=\"dark\">\n";
6595                                 } else {
6596                                         print "<tr class=\"light\">\n";
6597                                 }
6598                                 $alternate ^= 1;
6599                                 %co = parse_commit($set{'commit'});
6600                                 my $author = chop_and_escape_str($co{'author_name'}, 15, 5);
6601                                 print "<td title=\"$co{'age_string_age'}\"><i>$co{'age_string_date'}</i></td>\n" .
6602                                       "<td><i>$author</i></td>\n" .
6603                                       "<td>" .
6604                                       $cgi->a({-href => href(action=>"commit", hash=>$co{'id'}),
6605                                               -class => "list subject"},
6606                                               chop_and_escape_str($co{'title'}, 50) . "<br/>");
6607                         } elsif (defined $set{'to_id'}) {
6608                                 next if ($set{'to_id'} =~ m/^0{40}$/);
6609
6610                                 print $cgi->a({-href => href(action=>"blob", hash_base=>$co{'id'},
6611                                                              hash=>$set{'to_id'}, file_name=>$set{'to_file'}),
6612                                               -class => "list"},
6613                                               "<span class=\"match\">" . esc_path($set{'file'}) . "</span>") .
6614                                       "<br/>\n";
6615                         }
6616                 }
6617                 close $fd;
6618
6619                 # finish last commit (warning: repetition!)
6620                 if (%co) {
6621                         print "</td>\n" .
6622                               "<td class=\"link\">" .
6623                               $cgi->a({-href => href(action=>"commit", hash=>$co{'id'})}, "commit") .
6624                               " | " .
6625                               $cgi->a({-href => href(action=>"tree", hash=>$co{'tree'}, hash_base=>$co{'id'})}, "tree");
6626                         print "</td>\n" .
6627                               "</tr>\n";
6628                 }
6629
6630                 print "</table>\n";
6631         }
6632
6633         if ($searchtype eq 'grep') {
6634                 git_print_page_nav('','', $hash,$co{'tree'},$hash);
6635                 git_print_header_div('commit', esc_html($co{'title'}), $hash);
6636
6637                 print "<table class=\"grep_search\">\n";
6638                 my $alternate = 1;
6639                 my $matches = 0;
6640                 local $/ = "\n";
6641                 open my $fd, "-|", git_cmd(), 'grep', '-n',
6642                         $search_use_regexp ? ('-E', '-i') : '-F',
6643                         $searchtext, $co{'tree'};
6644                 my $lastfile = '';
6645                 while (my $line = <$fd>) {
6646                         chomp $line;
6647                         my ($file, $lno, $ltext, $binary);
6648                         last if ($matches++ > 1000);
6649                         if ($line =~ /^Binary file (.+) matches$/) {
6650                                 $file = $1;
6651                                 $binary = 1;
6652                         } else {
6653                                 (undef, $file, $lno, $ltext) = split(/:/, $line, 4);
6654                         }
6655                         if ($file ne $lastfile) {
6656                                 $lastfile and print "</td></tr>\n";
6657                                 if ($alternate++) {
6658                                         print "<tr class=\"dark\">\n";
6659                                 } else {
6660                                         print "<tr class=\"light\">\n";
6661                                 }
6662                                 print "<td class=\"list\">".
6663                                         $cgi->a({-href => href(action=>"blob", hash=>$co{'hash'},
6664                                                                file_name=>"$file"),
6665                                                 -class => "list"}, esc_path($file));
6666                                 print "</td><td>\n";
6667                                 $lastfile = $file;
6668                         }
6669                         if ($binary) {
6670                                 print "<div class=\"binary\">Binary file</div>\n";
6671                         } else {
6672                                 $ltext = untabify($ltext);
6673                                 if ($ltext =~ m/^(.*)($search_regexp)(.*)$/i) {
6674                                         $ltext = esc_html($1, -nbsp=>1);
6675                                         $ltext .= '<span class="match">';
6676                                         $ltext .= esc_html($2, -nbsp=>1);
6677                                         $ltext .= '</span>';
6678                                         $ltext .= esc_html($3, -nbsp=>1);
6679                                 } else {
6680                                         $ltext = esc_html($ltext, -nbsp=>1);
6681                                 }
6682                                 print "<div class=\"pre\">" .
6683                                         $cgi->a({-href => href(action=>"blob", hash=>$co{'hash'},
6684                                                                file_name=>"$file").'#l'.$lno,
6685                                                 -class => "linenr"}, sprintf('%4i', $lno))
6686                                         . ' ' .  $ltext . "</div>\n";
6687                         }
6688                 }
6689                 if ($lastfile) {
6690                         print "</td></tr>\n";
6691                         if ($matches > 1000) {
6692                                 print "<div class=\"diff nodifferences\">Too many matches, listing trimmed</div>\n";
6693                         }
6694                 } else {
6695                         print "<div class=\"diff nodifferences\">No matches found</div>\n";
6696                 }
6697                 close $fd;
6698
6699                 print "</table>\n";
6700         }
6701         git_footer_html();
6702 }
6703
6704 sub git_search_help {
6705         git_header_html();
6706         git_print_page_nav('','', $hash,$hash,$hash);
6707         print <<EOT;
6708 <p><strong>Pattern</strong> is by default a normal string that is matched precisely (but without
6709 regard to case, except in the case of pickaxe). However, when you check the <em>re</em> checkbox,
6710 the pattern entered is recognized as the POSIX extended
6711 <a href="http://en.wikipedia.org/wiki/Regular_expression">regular expression</a> (also case
6712 insensitive).</p>
6713 <dl>
6714 <dt><b>commit</b></dt>
6715 <dd>The commit messages and authorship information will be scanned for the given pattern.</dd>
6716 EOT
6717         my $have_grep = gitweb_check_feature('grep');
6718         if ($have_grep) {
6719                 print <<EOT;
6720 <dt><b>grep</b></dt>
6721 <dd>All files in the currently selected tree (HEAD unless you are explicitly browsing
6722     a different one) are searched for the given pattern. On large trees, this search can take
6723 a while and put some strain on the server, so please use it with some consideration. Note that
6724 due to git-grep peculiarity, currently if regexp mode is turned off, the matches are
6725 case-sensitive.</dd>
6726 EOT
6727         }
6728         print <<EOT;
6729 <dt><b>author</b></dt>
6730 <dd>Name and e-mail of the change author and date of birth of the patch will be scanned for the given pattern.</dd>
6731 <dt><b>committer</b></dt>
6732 <dd>Name and e-mail of the committer and date of commit will be scanned for the given pattern.</dd>
6733 EOT
6734         my $have_pickaxe = gitweb_check_feature('pickaxe');
6735         if ($have_pickaxe) {
6736                 print <<EOT;
6737 <dt><b>pickaxe</b></dt>
6738 <dd>All commits that caused the string to appear or disappear from any file (changes that
6739 added, removed or "modified" the string) will be listed. This search can take a while and
6740 takes a lot of strain on the server, so please use it wisely. Note that since you may be
6741 interested even in changes just changing the case as well, this search is case sensitive.</dd>
6742 EOT
6743         }
6744         print "</dl>\n";
6745         git_footer_html();
6746 }
6747
6748 sub git_shortlog {
6749         git_log_generic('shortlog', \&git_shortlog_body,
6750                         $hash, $hash_parent);
6751 }
6752
6753 ## ......................................................................
6754 ## feeds (RSS, Atom; OPML)
6755
6756 sub git_feed {
6757         my $format = shift || 'atom';
6758         my $have_blame = gitweb_check_feature('blame');
6759
6760         # Atom: http://www.atomenabled.org/developers/syndication/
6761         # RSS:  http://www.notestips.com/80256B3A007F2692/1/NAMO5P9UPQ
6762         if ($format ne 'rss' && $format ne 'atom') {
6763                 die_error(400, "Unknown web feed format");
6764         }
6765
6766         # log/feed of current (HEAD) branch, log of given branch, history of file/directory
6767         my $head = $hash || 'HEAD';
6768         my @commitlist = parse_commits($head, 150, 0, $file_name);
6769
6770         my %latest_commit;
6771         my %latest_date;
6772         my $content_type = "application/$format+xml";
6773         if (defined $cgi->http('HTTP_ACCEPT') &&
6774                  $cgi->Accept('text/xml') > $cgi->Accept($content_type)) {
6775                 # browser (feed reader) prefers text/xml
6776                 $content_type = 'text/xml';
6777         }
6778         if (defined($commitlist[0])) {
6779                 %latest_commit = %{$commitlist[0]};
6780                 my $latest_epoch = $latest_commit{'committer_epoch'};
6781                 %latest_date   = parse_date($latest_epoch);
6782                 my $if_modified = $cgi->http('IF_MODIFIED_SINCE');
6783                 if (defined $if_modified) {
6784                         my $since;
6785                         if (eval { require HTTP::Date; 1; }) {
6786                                 $since = HTTP::Date::str2time($if_modified);
6787                         } elsif (eval { require Time::ParseDate; 1; }) {
6788                                 $since = Time::ParseDate::parsedate($if_modified, GMT => 1);
6789                         }
6790                         if (defined $since && $latest_epoch <= $since) {
6791                                 print $cgi->header(
6792                                         -type => $content_type,
6793                                         -charset => 'utf-8',
6794                                         -last_modified => $latest_date{'rfc2822'},
6795                                         -status => '304 Not Modified');
6796                                 return;
6797                         }
6798                 }
6799                 print $cgi->header(
6800                         -type => $content_type,
6801                         -charset => 'utf-8',
6802                         -last_modified => $latest_date{'rfc2822'});
6803         } else {
6804                 print $cgi->header(
6805                         -type => $content_type,
6806                         -charset => 'utf-8');
6807         }
6808
6809         # Optimization: skip generating the body if client asks only
6810         # for Last-Modified date.
6811         return if ($cgi->request_method() eq 'HEAD');
6812
6813         # header variables
6814         my $title = "$site_name - $project/$action";
6815         my $feed_type = 'log';
6816         if (defined $hash) {
6817                 $title .= " - '$hash'";
6818                 $feed_type = 'branch log';
6819                 if (defined $file_name) {
6820                         $title .= " :: $file_name";
6821                         $feed_type = 'history';
6822                 }
6823         } elsif (defined $file_name) {
6824                 $title .= " - $file_name";
6825                 $feed_type = 'history';
6826         }
6827         $title .= " $feed_type";
6828         my $descr = git_get_project_description($project);
6829         if (defined $descr) {
6830                 $descr = esc_html($descr);
6831         } else {
6832                 $descr = "$project " .
6833                          ($format eq 'rss' ? 'RSS' : 'Atom') .
6834                          " feed";
6835         }
6836         my $owner = git_get_project_owner($project);
6837         $owner = esc_html($owner);
6838
6839         #header
6840         my $alt_url;
6841         if (defined $file_name) {
6842                 $alt_url = href(-full=>1, action=>"history", hash=>$hash, file_name=>$file_name);
6843         } elsif (defined $hash) {
6844                 $alt_url = href(-full=>1, action=>"log", hash=>$hash);
6845         } else {
6846                 $alt_url = href(-full=>1, action=>"summary");
6847         }
6848         print qq!<?xml version="1.0" encoding="utf-8"?>\n!;
6849         if ($format eq 'rss') {
6850                 print <<XML;
6851 <rss version="2.0" xmlns:content="http://purl.org/rss/1.0/modules/content/">
6852 <channel>
6853 XML
6854                 print "<title>$title</title>\n" .
6855                       "<link>$alt_url</link>\n" .
6856                       "<description>$descr</description>\n" .
6857                       "<language>en</language>\n" .
6858                       # project owner is responsible for 'editorial' content
6859                       "<managingEditor>$owner</managingEditor>\n";
6860                 if (defined $logo || defined $favicon) {
6861                         # prefer the logo to the favicon, since RSS
6862                         # doesn't allow both
6863                         my $img = esc_url($logo || $favicon);
6864                         print "<image>\n" .
6865                               "<url>$img</url>\n" .
6866                               "<title>$title</title>\n" .
6867                               "<link>$alt_url</link>\n" .
6868                               "</image>\n";
6869                 }
6870                 if (%latest_date) {
6871                         print "<pubDate>$latest_date{'rfc2822'}</pubDate>\n";
6872                         print "<lastBuildDate>$latest_date{'rfc2822'}</lastBuildDate>\n";
6873                 }
6874                 print "<generator>gitweb v.$version/$git_version</generator>\n";
6875         } elsif ($format eq 'atom') {
6876                 print <<XML;
6877 <feed xmlns="http://www.w3.org/2005/Atom">
6878 XML
6879                 print "<title>$title</title>\n" .
6880                       "<subtitle>$descr</subtitle>\n" .
6881                       '<link rel="alternate" type="text/html" href="' .
6882                       $alt_url . '" />' . "\n" .
6883                       '<link rel="self" type="' . $content_type . '" href="' .
6884                       $cgi->self_url() . '" />' . "\n" .
6885                       "<id>" . href(-full=>1) . "</id>\n" .
6886                       # use project owner for feed author
6887                       "<author><name>$owner</name></author>\n";
6888                 if (defined $favicon) {
6889                         print "<icon>" . esc_url($favicon) . "</icon>\n";
6890                 }
6891                 if (defined $logo_url) {
6892                         # not twice as wide as tall: 72 x 27 pixels
6893                         print "<logo>" . esc_url($logo) . "</logo>\n";
6894                 }
6895                 if (! %latest_date) {
6896                         # dummy date to keep the feed valid until commits trickle in:
6897                         print "<updated>1970-01-01T00:00:00Z</updated>\n";
6898                 } else {
6899                         print "<updated>$latest_date{'iso-8601'}</updated>\n";
6900                 }
6901                 print "<generator version='$version/$git_version'>gitweb</generator>\n";
6902         }
6903
6904         # contents
6905         for (my $i = 0; $i <= $#commitlist; $i++) {
6906                 my %co = %{$commitlist[$i]};
6907                 my $commit = $co{'id'};
6908                 # we read 150, we always show 30 and the ones more recent than 48 hours
6909                 if (($i >= 20) && ((time - $co{'author_epoch'}) > 48*60*60)) {
6910                         last;
6911                 }
6912                 my %cd = parse_date($co{'author_epoch'});
6913
6914                 # get list of changed files
6915                 open my $fd, "-|", git_cmd(), "diff-tree", '-r', @diff_opts,
6916                         $co{'parent'} || "--root",
6917                         $co{'id'}, "--", (defined $file_name ? $file_name : ())
6918                         or next;
6919                 my @difftree = map { chomp; $_ } <$fd>;
6920                 close $fd
6921                         or next;
6922
6923                 # print element (entry, item)
6924                 my $co_url = href(-full=>1, action=>"commitdiff", hash=>$commit);
6925                 if ($format eq 'rss') {
6926                         print "<item>\n" .
6927                               "<title>" . esc_html($co{'title'}) . "</title>\n" .
6928                               "<author>" . esc_html($co{'author'}) . "</author>\n" .
6929                               "<pubDate>$cd{'rfc2822'}</pubDate>\n" .
6930                               "<guid isPermaLink=\"true\">$co_url</guid>\n" .
6931                               "<link>$co_url</link>\n" .
6932                               "<description>" . esc_html($co{'title'}) . "</description>\n" .
6933                               "<content:encoded>" .
6934                               "<![CDATA[\n";
6935                 } elsif ($format eq 'atom') {
6936                         print "<entry>\n" .
6937                               "<title type=\"html\">" . esc_html($co{'title'}) . "</title>\n" .
6938                               "<updated>$cd{'iso-8601'}</updated>\n" .
6939                               "<author>\n" .
6940                               "  <name>" . esc_html($co{'author_name'}) . "</name>\n";
6941                         if ($co{'author_email'}) {
6942                                 print "  <email>" . esc_html($co{'author_email'}) . "</email>\n";
6943                         }
6944                         print "</author>\n" .
6945                               # use committer for contributor
6946                               "<contributor>\n" .
6947                               "  <name>" . esc_html($co{'committer_name'}) . "</name>\n";
6948                         if ($co{'committer_email'}) {
6949                                 print "  <email>" . esc_html($co{'committer_email'}) . "</email>\n";
6950                         }
6951                         print "</contributor>\n" .
6952                               "<published>$cd{'iso-8601'}</published>\n" .
6953                               "<link rel=\"alternate\" type=\"text/html\" href=\"$co_url\" />\n" .
6954                               "<id>$co_url</id>\n" .
6955                               "<content type=\"xhtml\" xml:base=\"" . esc_url($my_url) . "\">\n" .
6956                               "<div xmlns=\"http://www.w3.org/1999/xhtml\">\n";
6957                 }
6958                 my $comment = $co{'comment'};
6959                 print "<pre>\n";
6960                 foreach my $line (@$comment) {
6961                         $line = esc_html($line);
6962                         print "$line\n";
6963                 }
6964                 print "</pre><ul>\n";
6965                 foreach my $difftree_line (@difftree) {
6966                         my %difftree = parse_difftree_raw_line($difftree_line);
6967                         next if !$difftree{'from_id'};
6968
6969                         my $file = $difftree{'file'} || $difftree{'to_file'};
6970
6971                         print "<li>" .
6972                               "[" .
6973                               $cgi->a({-href => href(-full=>1, action=>"blobdiff",
6974                                                      hash=>$difftree{'to_id'}, hash_parent=>$difftree{'from_id'},
6975                                                      hash_base=>$co{'id'}, hash_parent_base=>$co{'parent'},
6976                                                      file_name=>$file, file_parent=>$difftree{'from_file'}),
6977                                       -title => "diff"}, 'D');
6978                         if ($have_blame) {
6979                                 print $cgi->a({-href => href(-full=>1, action=>"blame",
6980                                                              file_name=>$file, hash_base=>$commit),
6981                                               -title => "blame"}, 'B');
6982                         }
6983                         # if this is not a feed of a file history
6984                         if (!defined $file_name || $file_name ne $file) {
6985                                 print $cgi->a({-href => href(-full=>1, action=>"history",
6986                                                              file_name=>$file, hash=>$commit),
6987                                               -title => "history"}, 'H');
6988                         }
6989                         $file = esc_path($file);
6990                         print "] ".
6991                               "$file</li>\n";
6992                 }
6993                 if ($format eq 'rss') {
6994                         print "</ul>]]>\n" .
6995                               "</content:encoded>\n" .
6996                               "</item>\n";
6997                 } elsif ($format eq 'atom') {
6998                         print "</ul>\n</div>\n" .
6999                               "</content>\n" .
7000                               "</entry>\n";
7001                 }
7002         }
7003
7004         # end of feed
7005         if ($format eq 'rss') {
7006                 print "</channel>\n</rss>\n";
7007         } elsif ($format eq 'atom') {
7008                 print "</feed>\n";
7009         }
7010 }
7011
7012 sub git_rss {
7013         git_feed('rss');
7014 }
7015
7016 sub git_atom {
7017         git_feed('atom');
7018 }
7019
7020 sub git_opml {
7021         my @list = git_get_projects_list();
7022
7023         print $cgi->header(
7024                 -type => 'text/xml',
7025                 -charset => 'utf-8',
7026                 -content_disposition => 'inline; filename="opml.xml"');
7027
7028         print <<XML;
7029 <?xml version="1.0" encoding="utf-8"?>
7030 <opml version="1.0">
7031 <head>
7032   <title>$site_name OPML Export</title>
7033 </head>
7034 <body>
7035 <outline text="git RSS feeds">
7036 XML
7037
7038         foreach my $pr (@list) {
7039                 my %proj = %$pr;
7040                 my $head = git_get_head_hash($proj{'path'});
7041                 if (!defined $head) {
7042                         next;
7043                 }
7044                 $git_dir = "$projectroot/$proj{'path'}";
7045                 my %co = parse_commit($head);
7046                 if (!%co) {
7047                         next;
7048                 }
7049
7050                 my $path = esc_html(chop_str($proj{'path'}, 25, 5));
7051                 my $rss  = href('project' => $proj{'path'}, 'action' => 'rss', -full => 1);
7052                 my $html = href('project' => $proj{'path'}, 'action' => 'summary', -full => 1);
7053                 print "<outline type=\"rss\" text=\"$path\" title=\"$path\" xmlUrl=\"$rss\" htmlUrl=\"$html\"/>\n";
7054         }
7055         print <<XML;
7056 </outline>
7057 </body>
7058 </opml>
7059 XML
7060 }