gitweb/gitweb.perl

   1 #!/usr/bin/perl
   2
   3 # gitweb - simple web interface to track changes in git repositories
   4 #
   5 # (C) 2005-2006, Kay Sievers <kay.sievers@vrfy.org>
   6 # (C) 2005, Christian Gierke
   7 #
   8 # This program is licensed under the GPLv2
   9
  10 use 5.008;
  11 use strict;
  12 use warnings;
  13 use CGI qw(:standard :escapeHTML -nosticky);
  14 use CGI::Util qw(unescape);
  15 use CGI::Carp qw(fatalsToBrowser set_message);
  16 use Encode;
  17 use Fcntl ':mode';
  18 use File::Find qw();
  19 use File::Basename qw(basename);
  20 binmode STDOUT, ':utf8';
  21
  22 our $t0;
  23 if (eval { require Time::HiRes; 1; }) {
  24         $t0 = [Time::HiRes::gettimeofday()];
  25 }
  26 our $number_of_git_cmds = 0;
  27
  28 BEGIN {
  29         CGI->compile() if $ENV{'MOD_PERL'};
  30 }
  31
  32 our $version = "++GIT_VERSION++";
  33
  34 our ($my_url, $my_uri, $base_url, $path_info, $home_link);
  35 sub evaluate_uri {
  36         our $cgi;
  37
  38         our $my_url = $cgi->url();
  39         our $my_uri = $cgi->url(-absolute => 1);
  40
  41         # Base URL for relative URLs in gitweb ($logo, $favicon, ...),
  42         # needed and used only for URLs with nonempty PATH_INFO
  43         our $base_url = $my_url;
  44
  45         # When the script is used as DirectoryIndex, the URL does not contain the name
  46         # of the script file itself, and $cgi->url() fails to strip PATH_INFO, so we
  47         # have to do it ourselves. We make $path_info global because it's also used
  48         # later on.
  49         #
  50         # Another issue with the script being the DirectoryIndex is that the resulting
  51         # $my_url data is not the full script URL: this is good, because we want
  52         # generated links to keep implying the script name if it wasn't explicitly
  53         # indicated in the URL we're handling, but it means that $my_url cannot be used
  54         # as base URL.
  55         # Therefore, if we needed to strip PATH_INFO, then we know that we have
  56         # to build the base URL ourselves:
  57         our $path_info = $ENV{"PATH_INFO"};
  58         if ($path_info) {
  59                 if ($my_url =~ s,\Q$path_info\E$,, &&
  60                     $my_uri =~ s,\Q$path_info\E$,, &&
  61                     defined $ENV{'SCRIPT_NAME'}) {
  62                         $base_url = $cgi->url(-base => 1) . $ENV{'SCRIPT_NAME'};
  63                 }
  64         }
  65
  66         # target of the home link on top of all pages
  67         our $home_link = $my_uri || "/";
  68 }
  69
  70 # core git executable to use
  71 # this can just be "git" if your webserver has a sensible PATH
  72 our $GIT = "++GIT_BINDIR++/git";
  73
  74 # absolute fs-path which will be prepended to the project path
  75 #our $projectroot = "/pub/scm";
  76 our $projectroot = "++GITWEB_PROJECTROOT++";
  77
  78 # fs traversing limit for getting project list
  79 # the number is relative to the projectroot
  80 our $project_maxdepth = "++GITWEB_PROJECT_MAXDEPTH++";
  81
  82 # string of the home link on top of all pages
  83 our $home_link_str = "++GITWEB_HOME_LINK_STR++";
  84
  85 # name of your site or organization to appear in page titles
  86 # replace this with something more descriptive for clearer bookmarks
  87 our $site_name = "++GITWEB_SITENAME++"
  88                  || ($ENV{'SERVER_NAME'} || "Untitled") . " Git";
  89
  90 # filename of html text to include at top of each page
  91 our $site_header = "++GITWEB_SITE_HEADER++";
  92 # html text to include at home page
  93 our $home_text = "++GITWEB_HOMETEXT++";
  94 # filename of html text to include at bottom of each page
  95 our $site_footer = "++GITWEB_SITE_FOOTER++";
  96
  97 # URI of stylesheets
  98 our @stylesheets = ("++GITWEB_CSS++");
  99 # URI of a single stylesheet, which can be overridden in GITWEB_CONFIG.
 100 our $stylesheet = undef;
 101 # URI of GIT logo (72x27 size)
 102 our $logo = "++GITWEB_LOGO++";
 103 # URI of GIT favicon, assumed to be image/png type
 104 our $favicon = "++GITWEB_FAVICON++";
 105 # URI of gitweb.js (JavaScript code for gitweb)
 106 our $javascript = "++GITWEB_JS++";
 107
 108 # URI and label (title) of GIT logo link
 109 #our $logo_url = "http://www.kernel.org/pub/software/scm/git/docs/";
 110 #our $logo_label = "git documentation";
 111 our $logo_url = "http://git-scm.com/";
 112 our $logo_label = "git homepage";
 113
 114 # source of projects list
 115 our $projects_list = "++GITWEB_LIST++";
 116
 117 # the width (in characters) of the projects list "Description" column
 118 our $projects_list_description_width = 25;
 119
 120 # default order of projects list
 121 # valid values are none, project, descr, owner, and age
 122 our $default_projects_order = "project";
 123
 124 # show repository only if this file exists
 125 # (only effective if this variable evaluates to true)
 126 our $export_ok = "++GITWEB_EXPORT_OK++";
 127
 128 # show repository only if this subroutine returns true
 129 # when given the path to the project, for example:
 130 #    sub { return -e "$_[0]/git-daemon-export-ok"; }
 131 our $export_auth_hook = undef;
 132
 133 # only allow viewing of repositories also shown on the overview page
 134 our $strict_export = "++GITWEB_STRICT_EXPORT++";
 135
 136 # list of git base URLs used for URL to where fetch project from,
 137 # i.e. full URL is "$git_base_url/$project"
 138 our @git_base_url_list = grep { $_ ne '' } ("++GITWEB_BASE_URL++");
 139
 140 # default blob_plain mimetype and default charset for text/plain blob
 141 our $default_blob_plain_mimetype = 'text/plain';
 142 our $default_text_plain_charset  = undef;
 143
 144 # file to use for guessing MIME types before trying /etc/mime.types
 145 # (relative to the current git repository)
 146 our $mimetypes_file = undef;
 147
 148 # assume this charset if line contains non-UTF-8 characters;
 149 # it should be valid encoding (see Encoding::Supported(3pm) for list),
 150 # for which encoding all byte sequences are valid, for example
 151 # 'iso-8859-1' aka 'latin1' (it is decoded without checking, so it
 152 # could be even 'utf-8' for the old behavior)
 153 our $fallback_encoding = 'latin1';
 154
 155 # rename detection options for git-diff and git-diff-tree
 156 # - default is '-M', with the cost proportional to
 157 #   (number of removed files) * (number of new files).
 158 # - more costly is '-C' (which implies '-M'), with the cost proportional to
 159 #   (number of changed files + number of removed files) * (number of new files)
 160 # - even more costly is '-C', '--find-copies-harder' with cost
 161 #   (number of files in the original tree) * (number of new files)
 162 # - one might want to include '-B' option, e.g. '-B', '-M'
 163 our @diff_opts = ('-M'); # taken from git_commit
 164
 165 # Disables features that would allow repository owners to inject script into
 166 # the gitweb domain.
 167 our $prevent_xss = 0;
 168
 169 # Path to the highlight executable to use (must be the one from
 170 # http://www.andre-simon.de due to assumptions about parameters and output).
 171 # Useful if highlight is not installed on your webserver's PATH.
 172 # [Default: highlight]
 173 our $highlight_bin = "++HIGHLIGHT_BIN++";
 174
 175 # information about snapshot formats that gitweb is capable of serving
 176 our %known_snapshot_formats = (
 177         # name => {
 178         #       'display' => display name,
 179         #       'type' => mime type,
 180         #       'suffix' => filename suffix,
 181         #       'format' => --format for git-archive,
 182         #       'compressor' => [compressor command and arguments]
 183         #                       (array reference, optional)
 184         #       'disabled' => boolean (optional)}
 185         #
 186         'tgz' => {
 187                 'display' => 'tar.gz',
 188                 'type' => 'application/x-gzip',
 189                 'suffix' => '.tar.gz',
 190                 'format' => 'tar',
 191                 'compressor' => ['gzip']},
 192
 193         'tbz2' => {
 194                 'display' => 'tar.bz2',
 195                 'type' => 'application/x-bzip2',
 196                 'suffix' => '.tar.bz2',
 197                 'format' => 'tar',
 198                 'compressor' => ['bzip2']},
 199
 200         'txz' => {
 201                 'display' => 'tar.xz',
 202                 'type' => 'application/x-xz',
 203                 'suffix' => '.tar.xz',
 204                 'format' => 'tar',
 205                 'compressor' => ['xz'],
 206                 'disabled' => 1},
 207
 208         'zip' => {
 209                 'display' => 'zip',
 210                 'type' => 'application/x-zip',
 211                 'suffix' => '.zip',
 212                 'format' => 'zip'},
 213 );
 214
 215 # Aliases so we understand old gitweb.snapshot values in repository
 216 # configuration.
 217 our %known_snapshot_format_aliases = (
 218         'gzip'  => 'tgz',
 219         'bzip2' => 'tbz2',
 220         'xz'    => 'txz',
 221
 222         # backward compatibility: legacy gitweb config support
 223         'x-gzip' => undef, 'gz' => undef,
 224         'x-bzip2' => undef, 'bz2' => undef,
 225         'x-zip' => undef, '' => undef,
 226 );
 227
 228 # Pixel sizes for icons and avatars. If the default font sizes or lineheights
 229 # are changed, it may be appropriate to change these values too via
 230 # $GITWEB_CONFIG.
 231 our %avatar_size = (
 232         'default' => 16,
 233         'double'  => 32
 234 );
 235
 236 # Used to set the maximum load that we will still respond to gitweb queries.
 237 # If server load exceed this value then return "503 server busy" error.
 238 # If gitweb cannot determined server load, it is taken to be 0.
 239 # Leave it undefined (or set to 'undef') to turn off load checking.
 240 our $maxload = 300;
 241
 242 # configuration for 'highlight' (http://www.andre-simon.de/)
 243 # match by basename
 244 our %highlight_basename = (
 245         #'Program' => 'py',
 246         #'Library' => 'py',
 247         'SConstruct' => 'py', # SCons equivalent of Makefile
 248         'Makefile' => 'make',
 249 );
 250 # match by extension
 251 our %highlight_ext = (
 252         # main extensions, defining name of syntax;
 253         # see files in /usr/share/highlight/langDefs/ directory
 254         map { $_ => $_ }
 255                 qw(py c cpp rb java css php sh pl js tex bib xml awk bat ini spec tcl),
 256         # alternate extensions, see /etc/highlight/filetypes.conf
 257         'h' => 'c',
 258         map { $_ => 'cpp' } qw(cxx c++ cc),
 259         map { $_ => 'php' } qw(php3 php4),
 260         map { $_ => 'pl'  } qw(perl pm), # perhaps also 'cgi'
 261         'mak' => 'make',
 262         map { $_ => 'xml' } qw(xhtml html htm),
 263 );
 264
 265 # You define site-wide feature defaults here; override them with
 266 # $GITWEB_CONFIG as necessary.
 267 our %feature = (
 268         # feature => {
 269         #       'sub' => feature-sub (subroutine),
 270         #       'override' => allow-override (boolean),
 271         #       'default' => [ default options...] (array reference)}
 272         #
 273         # if feature is overridable (it means that allow-override has true value),
 274         # then feature-sub will be called with default options as parameters;
 275         # return value of feature-sub indicates if to enable specified feature
 276         #
 277         # if there is no 'sub' key (no feature-sub), then feature cannot be
 278         # overridden
 279         #
 280         # use gitweb_get_feature(<feature>) to retrieve the <feature> value
 281         # (an array) or gitweb_check_feature(<feature>) to check if <feature>
 282         # is enabled
 283
 284         # Enable the 'blame' blob view, showing the last commit that modified
 285         # each line in the file. This can be very CPU-intensive.
 286
 287         # To enable system wide have in $GITWEB_CONFIG
 288         # $feature{'blame'}{'default'} = [1];
 289         # To have project specific config enable override in $GITWEB_CONFIG
 290         # $feature{'blame'}{'override'} = 1;
 291         # and in project config gitweb.blame = 0|1;
 292         'blame' => {
 293                 'sub' => sub { feature_bool('blame', @_) },
 294                 'override' => 0,
 295                 'default' => [0]},
 296
 297         # Enable the 'snapshot' link, providing a compressed archive of any
 298         # tree. This can potentially generate high traffic if you have large
 299         # project.
 300
 301         # Value is a list of formats defined in %known_snapshot_formats that
 302         # you wish to offer.
 303         # To disable system wide have in $GITWEB_CONFIG
 304         # $feature{'snapshot'}{'default'} = [];
 305         # To have project specific config enable override in $GITWEB_CONFIG
 306         # $feature{'snapshot'}{'override'} = 1;
 307         # and in project config, a comma-separated list of formats or "none"
 308         # to disable.  Example: gitweb.snapshot = tbz2,zip;
 309         'snapshot' => {
 310                 'sub' => \&feature_snapshot,
 311                 'override' => 0,
 312                 'default' => ['tgz']},
 313
 314         # Enable text search, which will list the commits which match author,
 315         # committer or commit text to a given string.  Enabled by default.
 316         # Project specific override is not supported.
 317         'search' => {
 318                 'override' => 0,
 319                 'default' => [1]},
 320
 321         # Enable grep search, which will list the files in currently selected
 322         # tree containing the given string. Enabled by default. This can be
 323         # potentially CPU-intensive, of course.
 324
 325         # To enable system wide have in $GITWEB_CONFIG
 326         # $feature{'grep'}{'default'} = [1];
 327         # To have project specific config enable override in $GITWEB_CONFIG
 328         # $feature{'grep'}{'override'} = 1;
 329         # and in project config gitweb.grep = 0|1;
 330         'grep' => {
 331                 'sub' => sub { feature_bool('grep', @_) },
 332                 'override' => 0,
 333                 'default' => [1]},
 334
 335         # Enable the pickaxe search, which will list the commits that modified
 336         # a given string in a file. This can be practical and quite faster
 337         # alternative to 'blame', but still potentially CPU-intensive.
 338
 339         # To enable system wide have in $GITWEB_CONFIG
 340         # $feature{'pickaxe'}{'default'} = [1];
 341         # To have project specific config enable override in $GITWEB_CONFIG
 342         # $feature{'pickaxe'}{'override'} = 1;
 343         # and in project config gitweb.pickaxe = 0|1;
 344         'pickaxe' => {
 345                 'sub' => sub { feature_bool('pickaxe', @_) },
 346                 'override' => 0,
 347                 'default' => [1]},
 348
 349         # Enable showing size of blobs in a 'tree' view, in a separate
 350         # column, similar to what 'ls -l' does.  This cost a bit of IO.
 351
 352         # To disable system wide have in $GITWEB_CONFIG
 353         # $feature{'show-sizes'}{'default'} = [0];
 354         # To have project specific config enable override in $GITWEB_CONFIG
 355         # $feature{'show-sizes'}{'override'} = 1;
 356         # and in project config gitweb.showsizes = 0|1;
 357         'show-sizes' => {
 358                 'sub' => sub { feature_bool('showsizes', @_) },
 359                 'override' => 0,
 360                 'default' => [1]},
 361
 362         # Make gitweb use an alternative format of the URLs which can be
 363         # more readable and natural-looking: project name is embedded
 364         # directly in the path and the query string contains other
 365         # auxiliary information. All gitweb installations recognize
 366         # URL in either format; this configures in which formats gitweb
 367         # generates links.
 368
 369         # To enable system wide have in $GITWEB_CONFIG
 370         # $feature{'pathinfo'}{'default'} = [1];
 371         # Project specific override is not supported.
 372
 373         # Note that you will need to change the default location of CSS,
 374         # favicon, logo and possibly other files to an absolute URL. Also,
 375         # if gitweb.cgi serves as your indexfile, you will need to force
 376         # $my_uri to contain the script name in your $GITWEB_CONFIG.
 377         'pathinfo' => {
 378                 'override' => 0,
 379                 'default' => [0]},
 380
 381         # Make gitweb consider projects in project root subdirectories
 382         # to be forks of existing projects. Given project $projname.git,
 383         # projects matching $projname/*.git will not be shown in the main
 384         # projects list, instead a '+' mark will be added to $projname
 385         # there and a 'forks' view will be enabled for the project, listing
 386         # all the forks. If project list is taken from a file, forks have
 387         # to be listed after the main project.
 388
 389         # To enable system wide have in $GITWEB_CONFIG
 390         # $feature{'forks'}{'default'} = [1];
 391         # Project specific override is not supported.
 392         'forks' => {
 393                 'override' => 0,
 394                 'default' => [0]},
 395
 396         # Insert custom links to the action bar of all project pages.
 397         # This enables you mainly to link to third-party scripts integrating
 398         # into gitweb; e.g. git-browser for graphical history representation
 399         # or custom web-based repository administration interface.
 400
 401         # The 'default' value consists of a list of triplets in the form
 402         # (label, link, position) where position is the label after which
 403         # to insert the link and link is a format string where %n expands
 404         # to the project name, %f to the project path within the filesystem,
 405         # %h to the current hash (h gitweb parameter) and %b to the current
 406         # hash base (hb gitweb parameter); %% expands to %.
 407
 408         # To enable system wide have in $GITWEB_CONFIG e.g.
 409         # $feature{'actions'}{'default'} = [('graphiclog',
 410         #       '/git-browser/by-commit.html?r=%n', 'summary')];
 411         # Project specific override is not supported.
 412         'actions' => {
 413                 'override' => 0,
 414                 'default' => []},
 415
 416         # Allow gitweb scan project content tags described in ctags/
 417         # of project repository, and display the popular Web 2.0-ish
 418         # "tag cloud" near the project list. Note that this is something
 419         # COMPLETELY different from the normal Git tags.
 420
 421         # gitweb by itself can show existing tags, but it does not handle
 422         # tagging itself; you need an external application for that.
 423         # For an example script, check Girocco's cgi/tagproj.cgi.
 424         # You may want to install the HTML::TagCloud Perl module to get
 425         # a pretty tag cloud instead of just a list of tags.
 426
 427         # To enable system wide have in $GITWEB_CONFIG
 428         # $feature{'ctags'}{'default'} = ['path_to_tag_script'];
 429         # Project specific override is not supported.
 430         'ctags' => {
 431                 'override' => 0,
 432                 'default' => [0]},
 433
 434         # The maximum number of patches in a patchset generated in patch
 435         # view. Set this to 0 or undef to disable patch view, or to a
 436         # negative number to remove any limit.
 437
 438         # To disable system wide have in $GITWEB_CONFIG
 439         # $feature{'patches'}{'default'} = [0];
 440         # To have project specific config enable override in $GITWEB_CONFIG
 441         # $feature{'patches'}{'override'} = 1;
 442         # and in project config gitweb.patches = 0|n;
 443         # where n is the maximum number of patches allowed in a patchset.
 444         'patches' => {
 445                 'sub' => \&feature_patches,
 446                 'override' => 0,
 447                 'default' => [16]},
 448
 449         # Avatar support. When this feature is enabled, views such as
 450         # shortlog or commit will display an avatar associated with
 451         # the email of the committer(s) and/or author(s).
 452
 453         # Currently available providers are gravatar and picon.
 454         # If an unknown provider is specified, the feature is disabled.
 455
 456         # Gravatar depends on Digest::MD5.
 457         # Picon currently relies on the indiana.edu database.
 458
 459         # To enable system wide have in $GITWEB_CONFIG
 460         # $feature{'avatar'}{'default'} = ['<provider>'];
 461         # where <provider> is either gravatar or picon.
 462         # To have project specific config enable override in $GITWEB_CONFIG
 463         # $feature{'avatar'}{'override'} = 1;
 464         # and in project config gitweb.avatar = <provider>;
 465         'avatar' => {
 466                 'sub' => \&feature_avatar,
 467                 'override' => 0,
 468                 'default' => ['']},
 469
 470         # Enable displaying how much time and how many git commands
 471         # it took to generate and display page.  Disabled by default.
 472         # Project specific override is not supported.
 473         'timed' => {
 474                 'override' => 0,
 475                 'default' => [0]},
 476
 477         # Enable turning some links into links to actions which require
 478         # JavaScript to run (like 'blame_incremental').  Not enabled by
 479         # default.  Project specific override is currently not supported.
 480         'javascript-actions' => {
 481                 'override' => 0,
 482                 'default' => [0]},
 483
 484         # Syntax highlighting support. This is based on Daniel Svensson's
 485         # and Sham Chukoury's work in gitweb-xmms2.git.
 486         # It requires the 'highlight' program present in $PATH,
 487         # and therefore is disabled by default.
 488
 489         # To enable system wide have in $GITWEB_CONFIG
 490         # $feature{'highlight'}{'default'} = [1];
 491
 492         'highlight' => {
 493                 'sub' => sub { feature_bool('highlight', @_) },
 494                 'override' => 0,
 495                 'default' => [0]},
 496
 497         # Enable displaying of remote heads in the heads list
 498
 499         # To enable system wide have in $GITWEB_CONFIG
 500         # $feature{'remote_heads'}{'default'} = [1];
 501         # To have project specific config enable override in $GITWEB_CONFIG
 502         # $feature{'remote_heads'}{'override'} = 1;
 503         # and in project config gitweb.remote_heads = 0|1;
 504         'remote_heads' => {
 505                 'sub' => sub { feature_bool('remote_heads', @_) },
 506                 'override' => 0,
 507                 'default' => [0]},
 508 );
 509
 510 sub gitweb_get_feature {
 511         my ($name) = @_;
 512         return unless exists $feature{$name};
 513         my ($sub, $override, @defaults) = (
 514                 $feature{$name}{'sub'},
 515                 $feature{$name}{'override'},
 516                 @{$feature{$name}{'default'}});
 517         # project specific override is possible only if we have project
 518         our $git_dir; # global variable, declared later
 519         if (!$override || !defined $git_dir) {
 520                 return @defaults;
 521         }
 522         if (!defined $sub) {
 523                 warn "feature $name is not overridable";
 524                 return @defaults;
 525         }
 526         return $sub->(@defaults);
 527 }
 528
 529 # A wrapper to check if a given feature is enabled.
 530 # With this, you can say
 531 #
 532 #   my $bool_feat = gitweb_check_feature('bool_feat');
 533 #   gitweb_check_feature('bool_feat') or somecode;
 534 #
 535 # instead of
 536 #
 537 #   my ($bool_feat) = gitweb_get_feature('bool_feat');
 538 #   (gitweb_get_feature('bool_feat'))[0] or somecode;
 539 #
 540 sub gitweb_check_feature {
 541         return (gitweb_get_feature(@_))[0];
 542 }
 543
 544
 545 sub feature_bool {
 546         my $key = shift;
 547         my ($val) = git_get_project_config($key, '--bool');
 548
 549         if (!defined $val) {
 550                 return ($_[0]);
 551         } elsif ($val eq 'true') {
 552                 return (1);
 553         } elsif ($val eq 'false') {
 554                 return (0);
 555         }
 556 }
 557
 558 sub feature_snapshot {
 559         my (@fmts) = @_;
 560
 561         my ($val) = git_get_project_config('snapshot');
 562
 563         if ($val) {
 564                 @fmts = ($val eq 'none' ? () : split /\s*[,\s]\s*/, $val);
 565         }
 566
 567         return @fmts;
 568 }
 569
 570 sub feature_patches {
 571         my @val = (git_get_project_config('patches', '--int'));
 572
 573         if (@val) {
 574                 return @val;
 575         }
 576
 577         return ($_[0]);
 578 }
 579
 580 sub feature_avatar {
 581         my @val = (git_get_project_config('avatar'));
 582
 583         return @val ? @val : @_;
 584 }
 585
 586 # checking HEAD file with -e is fragile if the repository was
 587 # initialized long time ago (i.e. symlink HEAD) and was pack-ref'ed
 588 # and then pruned.
 589 sub check_head_link {
 590         my ($dir) = @_;
 591         my $headfile = "$dir/HEAD";
 592         return ((-e $headfile) ||
 593                 (-l $headfile && readlink($headfile) =~ /^refs\/heads\//));
 594 }
 595
 596 sub check_export_ok {
 597         my ($dir) = @_;
 598         return (check_head_link($dir) &&
 599                 (!$export_ok || -e "$dir/$export_ok") &&
 600                 (!$export_auth_hook || $export_auth_hook->($dir)));
 601 }
 602
 603 # process alternate names for backward compatibility
 604 # filter out unsupported (unknown) snapshot formats
 605 sub filter_snapshot_fmts {
 606         my @fmts = @_;
 607
 608         @fmts = map {
 609                 exists $known_snapshot_format_aliases{$_} ?
 610                        $known_snapshot_format_aliases{$_} : $_} @fmts;
 611         @fmts = grep {
 612                 exists $known_snapshot_formats{$_} &&
 613                 !$known_snapshot_formats{$_}{'disabled'}} @fmts;
 614 }
 615
 616 our ($GITWEB_CONFIG, $GITWEB_CONFIG_SYSTEM);
 617 sub evaluate_gitweb_config {
 618         our $GITWEB_CONFIG = $ENV{'GITWEB_CONFIG'} || "++GITWEB_CONFIG++";
 619         our $GITWEB_CONFIG_SYSTEM = $ENV{'GITWEB_CONFIG_SYSTEM'} || "++GITWEB_CONFIG_SYSTEM++";
 620         # die if there are errors parsing config file
 621         if (-e $GITWEB_CONFIG) {
 622                 do $GITWEB_CONFIG;
 623                 die $@ if $@;
 624         } elsif (-e $GITWEB_CONFIG_SYSTEM) {
 625                 do $GITWEB_CONFIG_SYSTEM;
 626                 die $@ if $@;
 627         }
 628 }
 629
 630 # Get loadavg of system, to compare against $maxload.
 631 # Currently it requires '/proc/loadavg' present to get loadavg;
 632 # if it is not present it returns 0, which means no load checking.
 633 sub get_loadavg {
 634         if( -e '/proc/loadavg' ){
 635                 open my $fd, '<', '/proc/loadavg'
 636                         or return 0;
 637                 my @load = split(/\s+/, scalar <$fd>);
 638                 close $fd;
 639
 640                 # The first three columns measure CPU and IO utilization of the last one,
 641                 # five, and 10 minute periods.  The fourth column shows the number of
 642                 # currently running processes and the total number of processes in the m/n
 643                 # format.  The last column displays the last process ID used.
 644                 return $load[0] || 0;
 645         }
 646         # additional checks for load average should go here for things that don't export
 647         # /proc/loadavg
 648
 649         return 0;
 650 }
 651
 652 # version of the core git binary
 653 our $git_version;
 654 sub evaluate_git_version {
 655         our $git_version = qx("$GIT" --version) =~ m/git version (.*)$/ ? $1 : "unknown";
 656         $number_of_git_cmds++;
 657 }
 658
 659 sub check_loadavg {
 660         if (defined $maxload && get_loadavg() > $maxload) {
 661                 die_error(503, "The load average on the server is too high");
 662         }
 663 }
 664
 665 # ======================================================================
 666 # input validation and dispatch
 667
 668 # input parameters can be collected from a variety of sources (presently, CGI
 669 # and PATH_INFO), so we define an %input_params hash that collects them all
 670 # together during validation: this allows subsequent uses (e.g. href()) to be
 671 # agnostic of the parameter origin
 672
 673 our %input_params = ();
 674
 675 # input parameters are stored with the long parameter name as key. This will
 676 # also be used in the href subroutine to convert parameters to their CGI
 677 # equivalent, and since the href() usage is the most frequent one, we store
 678 # the name -> CGI key mapping here, instead of the reverse.
 679 #
 680 # XXX: Warning: If you touch this, check the search form for updating,
 681 # too.
 682
 683 our @cgi_param_mapping = (
 684         project => "p",
 685         action => "a",
 686         file_name => "f",
 687         file_parent => "fp",
 688         hash => "h",
 689         hash_parent => "hp",
 690         hash_base => "hb",
 691         hash_parent_base => "hpb",
 692         page => "pg",
 693         order => "o",
 694         searchtext => "s",
 695         searchtype => "st",
 696         snapshot_format => "sf",
 697         extra_options => "opt",
 698         search_use_regexp => "sr",
 699         # this must be last entry (for manipulation from JavaScript)
 700         javascript => "js"
 701 );
 702 our %cgi_param_mapping = @cgi_param_mapping;
 703
 704 # we will also need to know the possible actions, for validation
 705 our %actions = (
 706         "blame" => \&git_blame,
 707         "blame_incremental" => \&git_blame_incremental,
 708         "blame_data" => \&git_blame_data,
 709         "blobdiff" => \&git_blobdiff,
 710         "blobdiff_plain" => \&git_blobdiff_plain,
 711         "blob" => \&git_blob,
 712         "blob_plain" => \&git_blob_plain,
 713         "commitdiff" => \&git_commitdiff,
 714         "commitdiff_plain" => \&git_commitdiff_plain,
 715         "commit" => \&git_commit,
 716         "forks" => \&git_forks,
 717         "heads" => \&git_heads,
 718         "history" => \&git_history,
 719         "log" => \&git_log,
 720         "patch" => \&git_patch,
 721         "patches" => \&git_patches,
 722         "remotes" => \&git_remotes,
 723         "rss" => \&git_rss,
 724         "atom" => \&git_atom,
 725         "search" => \&git_search,
 726         "search_help" => \&git_search_help,
 727         "shortlog" => \&git_shortlog,
 728         "summary" => \&git_summary,
 729         "tag" => \&git_tag,
 730         "tags" => \&git_tags,
 731         "tree" => \&git_tree,
 732         "snapshot" => \&git_snapshot,
 733         "object" => \&git_object,
 734         # those below don't need $project
 735         "opml" => \&git_opml,
 736         "project_list" => \&git_project_list,
 737         "project_index" => \&git_project_index,
 738 );
 739
 740 # finally, we have the hash of allowed extra_options for the commands that
 741 # allow them
 742 our %allowed_options = (
 743         "--no-merges" => [ qw(rss atom log shortlog history) ],
 744 );
 745
 746 # fill %input_params with the CGI parameters. All values except for 'opt'
 747 # should be single values, but opt can be an array. We should probably
 748 # build an array of parameters that can be multi-valued, but since for the time
 749 # being it's only this one, we just single it out
 750 sub evaluate_query_params {
 751         our $cgi;
 752
 753         while (my ($name, $symbol) = each %cgi_param_mapping) {
 754                 if ($symbol eq 'opt') {
 755                         $input_params{$name} = [ $cgi->param($symbol) ];
 756                 } else {
 757                         $input_params{$name} = $cgi->param($symbol);
 758                 }
 759         }
 760 }
 761
 762 # now read PATH_INFO and update the parameter list for missing parameters
 763 sub evaluate_path_info {
 764         return if defined $input_params{'project'};
 765         return if !$path_info;
 766         $path_info =~ s,^/+,,;
 767         return if !$path_info;
 768
 769         # find which part of PATH_INFO is project
 770         my $project = $path_info;
 771         $project =~ s,/+$,,;
 772         while ($project && !check_head_link("$projectroot/$project")) {
 773                 $project =~ s,/*[^/]*$,,;
 774         }
 775         return unless $project;
 776         $input_params{'project'} = $project;
 777
 778         # do not change any parameters if an action is given using the query string
 779         return if $input_params{'action'};
 780         $path_info =~ s,^\Q$project\E/*,,;
 781
 782         # next, check if we have an action
 783         my $action = $path_info;
 784         $action =~ s,/.*$,,;
 785         if (exists $actions{$action}) {
 786                 $path_info =~ s,^$action/*,,;
 787                 $input_params{'action'} = $action;
 788         }
 789
 790         # list of actions that want hash_base instead of hash, but can have no
 791         # pathname (f) parameter
 792         my @wants_base = (
 793                 'tree',
 794                 'history',
 795         );
 796
 797         # we want to catch, among others
 798         # [$hash_parent_base[:$file_parent]..]$hash_parent[:$file_name]
 799         my ($parentrefname, $parentpathname, $refname, $pathname) =
 800                 ($path_info =~ /^(?:(.+?)(?::(.+))?\.\.)?([^:]+?)?(?::(.+))?$/);
 801
 802         # first, analyze the 'current' part
 803         if (defined $pathname) {
 804                 # we got "branch:filename" or "branch:dir/"
 805                 # we could use git_get_type(branch:pathname), but:
 806                 # - it needs $git_dir
 807                 # - it does a git() call
 808                 # - the convention of terminating directories with a slash
 809                 #   makes it superfluous
 810                 # - embedding the action in the PATH_INFO would make it even
 811                 #   more superfluous
 812                 $pathname =~ s,^/+,,;
 813                 if (!$pathname || substr($pathname, -1) eq "/") {
 814                         $input_params{'action'} ||= "tree";
 815                         $pathname =~ s,/$,,;
 816                 } else {
 817                         # the default action depends on whether we had parent info
 818                         # or not
 819                         if ($parentrefname) {
 820                                 $input_params{'action'} ||= "blobdiff_plain";
 821                         } else {
 822                                 $input_params{'action'} ||= "blob_plain";
 823                         }
 824                 }
 825                 $input_params{'hash_base'} ||= $refname;
 826                 $input_params{'file_name'} ||= $pathname;
 827         } elsif (defined $refname) {
 828                 # we got "branch". In this case we have to choose if we have to
 829                 # set hash or hash_base.
 830                 #
 831                 # Most of the actions without a pathname only want hash to be
 832                 # set, except for the ones specified in @wants_base that want
 833                 # hash_base instead. It should also be noted that hand-crafted
 834                 # links having 'history' as an action and no pathname or hash
 835                 # set will fail, but that happens regardless of PATH_INFO.
 836                 if (defined $parentrefname) {
 837                         # if there is parent let the default be 'shortlog' action
 838                         # (for http://git.example.com/repo.git/A..B links); if there
 839                         # is no parent, dispatch will detect type of object and set
 840                         # action appropriately if required (if action is not set)
 841                         $input_params{'action'} ||= "shortlog";
 842                 }
 843                 if ($input_params{'action'} &&
 844                     grep { $_ eq $input_params{'action'} } @wants_base) {
 845                         $input_params{'hash_base'} ||= $refname;
 846                 } else {
 847                         $input_params{'hash'} ||= $refname;
 848                 }
 849         }
 850
 851         # next, handle the 'parent' part, if present
 852         if (defined $parentrefname) {
 853                 # a missing pathspec defaults to the 'current' filename, allowing e.g.
 854                 # someproject/blobdiff/oldrev..newrev:/filename
 855                 if ($parentpathname) {
 856                         $parentpathname =~ s,^/+,,;
 857                         $parentpathname =~ s,/$,,;
 858                         $input_params{'file_parent'} ||= $parentpathname;
 859                 } else {
 860                         $input_params{'file_parent'} ||= $input_params{'file_name'};
 861                 }
 862                 # we assume that hash_parent_base is wanted if a path was specified,
 863                 # or if the action wants hash_base instead of hash
 864                 if (defined $input_params{'file_parent'} ||
 865                         grep { $_ eq $input_params{'action'} } @wants_base) {
 866                         $input_params{'hash_parent_base'} ||= $parentrefname;
 867                 } else {
 868                         $input_params{'hash_parent'} ||= $parentrefname;
 869                 }
 870         }
 871
 872         # for the snapshot action, we allow URLs in the form
 873         # $project/snapshot/$hash.ext
 874         # where .ext determines the snapshot and gets removed from the
 875         # passed $refname to provide the $hash.
 876         #
 877         # To be able to tell that $refname includes the format extension, we
 878         # require the following two conditions to be satisfied:
 879         # - the hash input parameter MUST have been set from the $refname part
 880         #   of the URL (i.e. they must be equal)
 881         # - the snapshot format MUST NOT have been defined already (e.g. from
 882         #   CGI parameter sf)
 883         # It's also useless to try any matching unless $refname has a dot,
 884         # so we check for that too
 885         if (defined $input_params{'action'} &&
 886                 $input_params{'action'} eq 'snapshot' &&
 887                 defined $refname && index($refname, '.') != -1 &&
 888                 $refname eq $input_params{'hash'} &&
 889                 !defined $input_params{'snapshot_format'}) {
 890                 # We loop over the known snapshot formats, checking for
 891                 # extensions. Allowed extensions are both the defined suffix
 892                 # (which includes the initial dot already) and the snapshot
 893                 # format key itself, with a prepended dot
 894                 while (my ($fmt, $opt) = each %known_snapshot_formats) {
 895                         my $hash = $refname;
 896                         unless ($hash =~ s/(\Q$opt->{'suffix'}\E|\Q.$fmt\E)$//) {
 897                                 next;
 898                         }
 899                         my $sfx = $1;
 900                         # a valid suffix was found, so set the snapshot format
 901                         # and reset the hash parameter
 902                         $input_params{'snapshot_format'} = $fmt;
 903                         $input_params{'hash'} = $hash;
 904                         # we also set the format suffix to the one requested
 905                         # in the URL: this way a request for e.g. .tgz returns
 906                         # a .tgz instead of a .tar.gz
 907                         $known_snapshot_formats{$fmt}{'suffix'} = $sfx;
 908                         last;
 909                 }
 910         }
 911 }
 912
 913 our ($action, $project, $file_name, $file_parent, $hash, $hash_parent, $hash_base,
 914      $hash_parent_base, @extra_options, $page, $searchtype, $search_use_regexp,
 915      $searchtext, $search_regexp);
 916 sub evaluate_and_validate_params {
 917         our $action = $input_params{'action'};
 918         if (defined $action) {
 919                 if (!validate_action($action)) {
 920                         die_error(400, "Invalid action parameter");
 921                 }
 922         }
 923
 924         # parameters which are pathnames
 925         our $project = $input_params{'project'};
 926         if (defined $project) {
 927                 if (!validate_project($project)) {
 928                         undef $project;
 929                         die_error(404, "No such project");
 930                 }
 931         }
 932
 933         our $file_name = $input_params{'file_name'};
 934         if (defined $file_name) {
 935                 if (!validate_pathname($file_name)) {
 936                         die_error(400, "Invalid file parameter");
 937                 }
 938         }
 939
 940         our $file_parent = $input_params{'file_parent'};
 941         if (defined $file_parent) {
 942                 if (!validate_pathname($file_parent)) {
 943                         die_error(400, "Invalid file parent parameter");
 944                 }
 945         }
 946
 947         # parameters which are refnames
 948         our $hash = $input_params{'hash'};
 949         if (defined $hash) {
 950                 if (!validate_refname($hash)) {
 951                         die_error(400, "Invalid hash parameter");
 952                 }
 953         }
 954
 955         our $hash_parent = $input_params{'hash_parent'};
 956         if (defined $hash_parent) {
 957                 if (!validate_refname($hash_parent)) {
 958                         die_error(400, "Invalid hash parent parameter");
 959                 }
 960         }
 961
 962         our $hash_base = $input_params{'hash_base'};
 963         if (defined $hash_base) {
 964                 if (!validate_refname($hash_base)) {
 965                         die_error(400, "Invalid hash base parameter");
 966                 }
 967         }
 968
 969         our @extra_options = @{$input_params{'extra_options'}};
 970         # @extra_options is always defined, since it can only be (currently) set from
 971         # CGI, and $cgi->param() returns the empty array in array context if the param
 972         # is not set
 973         foreach my $opt (@extra_options) {
 974                 if (not exists $allowed_options{$opt}) {
 975                         die_error(400, "Invalid option parameter");
 976                 }
 977                 if (not grep(/^$action$/, @{$allowed_options{$opt}})) {
 978                         die_error(400, "Invalid option parameter for this action");
 979                 }
 980         }
 981
 982         our $hash_parent_base = $input_params{'hash_parent_base'};
 983         if (defined $hash_parent_base) {
 984                 if (!validate_refname($hash_parent_base)) {
 985                         die_error(400, "Invalid hash parent base parameter");
 986                 }
 987         }
 988
 989         # other parameters
 990         our $page = $input_params{'page'};
 991         if (defined $page) {
 992                 if ($page =~ m/[^0-9]/) {
 993                         die_error(400, "Invalid page parameter");
 994                 }
 995         }
 996
 997         our $searchtype = $input_params{'searchtype'};
 998         if (defined $searchtype) {
 999                 if ($searchtype =~ m/[^a-z]/) {
1000                         die_error(400, "Invalid searchtype parameter");
1001                 }
1002         }
1003
1004         our $search_use_regexp = $input_params{'search_use_regexp'};
1005
1006         our $searchtext = $input_params{'searchtext'};
1007         our $search_regexp;
1008         if (defined $searchtext) {
1009                 if (length($searchtext) < 2) {
1010                         die_error(403, "At least two characters are required for search parameter");
1011                 }
1012                 $search_regexp = $search_use_regexp ? $searchtext : quotemeta $searchtext;
1013         }
1014 }
1015
1016 # path to the current git repository
1017 our $git_dir;
1018 sub evaluate_git_dir {
1019         our $git_dir = "$projectroot/$project" if $project;
1020 }
1021
1022 our (@snapshot_fmts, $git_avatar);
1023 sub configure_gitweb_features {
1024         # list of supported snapshot formats
1025         our @snapshot_fmts = gitweb_get_feature('snapshot');
1026         @snapshot_fmts = filter_snapshot_fmts(@snapshot_fmts);
1027
1028         # check that the avatar feature is set to a known provider name,
1029         # and for each provider check if the dependencies are satisfied.
1030         # if the provider name is invalid or the dependencies are not met,
1031         # reset $git_avatar to the empty string.
1032         our ($git_avatar) = gitweb_get_feature('avatar');
1033         if ($git_avatar eq 'gravatar') {
1034                 $git_avatar = '' unless (eval { require Digest::MD5; 1; });
1035         } elsif ($git_avatar eq 'picon') {
1036                 # no dependencies
1037         } else {
1038                 $git_avatar = '';
1039         }
1040 }
1041
1042 # custom error handler: 'die <message>' is Internal Server Error
1043 sub handle_errors_html {
1044         my $msg = shift; # it is already HTML escaped
1045
1046         # to avoid infinite loop where error occurs in die_error,
1047         # change handler to default handler, disabling handle_errors_html
1048         set_message("Error occured when inside die_error:\n$msg");
1049
1050         # you cannot jump out of die_error when called as error handler;
1051         # the subroutine set via CGI::Carp::set_message is called _after_
1052         # HTTP headers are already written, so it cannot write them itself
1053         die_error(undef, undef, $msg, -error_handler => 1, -no_http_header => 1);
1054 }
1055 set_message(\&handle_errors_html);
1056
1057 # dispatch
1058 sub dispatch {
1059         if (!defined $action) {
1060                 if (defined $hash) {
1061                         $action = git_get_type($hash);
1062                 } elsif (defined $hash_base && defined $file_name) {
1063                         $action = git_get_type("$hash_base:$file_name");
1064                 } elsif (defined $project) {
1065                         $action = 'summary';
1066                 } else {
1067                         $action = 'project_list';
1068                 }
1069         }
1070         if (!defined($actions{$action})) {
1071                 die_error(400, "Unknown action");
1072         }
1073         if ($action !~ m/^(?:opml|project_list|project_index)$/ &&
1074             !$project) {
1075                 die_error(400, "Project needed");
1076         }
1077         $actions{$action}->();
1078 }
1079
1080 sub reset_timer {
1081         our $t0 = [Time::HiRes::gettimeofday()]
1082                 if defined $t0;
1083         our $number_of_git_cmds = 0;
1084 }
1085
1086 sub run_request {
1087         reset_timer();
1088
1089         evaluate_uri();
1090         evaluate_gitweb_config();
1091         check_loadavg();
1092
1093         # $projectroot and $projects_list might be set in gitweb config file
1094         $projects_list ||= $projectroot;
1095
1096         evaluate_query_params();
1097         evaluate_path_info();
1098         evaluate_and_validate_params();
1099         evaluate_git_dir();
1100
1101         configure_gitweb_features();
1102
1103         dispatch();
1104 }
1105
1106 our $is_last_request = sub { 1 };
1107 our ($pre_dispatch_hook, $post_dispatch_hook, $pre_listen_hook);
1108 our $CGI = 'CGI';
1109 our $cgi;
1110 sub configure_as_fcgi {
1111         require CGI::Fast;
1112         our $CGI = 'CGI::Fast';
1113
1114         my $request_number = 0;
1115         # let each child service 100 requests
1116         our $is_last_request = sub { ++$request_number > 100 };
1117 }
1118 sub evaluate_argv {
1119         my $script_name = $ENV{'SCRIPT_NAME'} || $ENV{'SCRIPT_FILENAME'} || __FILE__;
1120         configure_as_fcgi()
1121                 if $script_name =~ /\.fcgi$/;
1122
1123         return unless (@ARGV);
1124
1125         require Getopt::Long;
1126         Getopt::Long::GetOptions(
1127                 'fastcgi|fcgi|f' => \&configure_as_fcgi,
1128                 'nproc|n=i' => sub {
1129                         my ($arg, $val) = @_;
1130                         return unless eval { require FCGI::ProcManager; 1; };
1131                         my $proc_manager = FCGI::ProcManager->new({
1132                                 n_processes => $val,
1133                         });
1134                         our $pre_listen_hook    = sub { $proc_manager->pm_manage()        };
1135                         our $pre_dispatch_hook  = sub { $proc_manager->pm_pre_dispatch()  };
1136                         our $post_dispatch_hook = sub { $proc_manager->pm_post_dispatch() };
1137                 },
1138         );
1139 }
1140
1141 sub run {
1142         evaluate_argv();
1143         evaluate_git_version();
1144
1145         $pre_listen_hook->()
1146                 if $pre_listen_hook;
1147
1148  REQUEST:
1149         while ($cgi = $CGI->new()) {
1150                 $pre_dispatch_hook->()
1151                         if $pre_dispatch_hook;
1152
1153                 run_request();
1154
1155                 $post_dispatch_hook->()
1156                         if $post_dispatch_hook;
1157
1158                 last REQUEST if ($is_last_request->());
1159         }
1160
1161  DONE_GITWEB:
1162         1;
1163 }
1164
1165 run();
1166
1167 if (defined caller) {
1168         # wrapped in a subroutine processing requests,
1169         # e.g. mod_perl with ModPerl::Registry, or PSGI with Plack::App::WrapCGI
1170         return;
1171 } else {
1172         # pure CGI script, serving single request
1173         exit;
1174 }
1175
1176 ## ======================================================================
1177 ## action links
1178
1179 # possible values of extra options
1180 # -full => 0|1      - use absolute/full URL ($my_uri/$my_url as base)
1181 # -replay => 1      - start from a current view (replay with modifications)
1182 # -path_info => 0|1 - don't use/use path_info URL (if possible)
1183 sub href {
1184         my %params = @_;
1185         # default is to use -absolute url() i.e. $my_uri
1186         my $href = $params{-full} ? $my_url : $my_uri;
1187
1188         $params{'project'} = $project unless exists $params{'project'};
1189
1190         if ($params{-replay}) {
1191                 while (my ($name, $symbol) = each %cgi_param_mapping) {
1192                         if (!exists $params{$name}) {
1193                                 $params{$name} = $input_params{$name};
1194                         }
1195                 }
1196         }
1197
1198         my $use_pathinfo = gitweb_check_feature('pathinfo');
1199         if (defined $params{'project'} &&
1200             (exists $params{-path_info} ? $params{-path_info} : $use_pathinfo)) {
1201                 # try to put as many parameters as possible in PATH_INFO:
1202                 #   - project name
1203                 #   - action
1204                 #   - hash_parent or hash_parent_base:/file_parent
1205                 #   - hash or hash_base:/filename
1206                 #   - the snapshot_format as an appropriate suffix
1207
1208                 # When the script is the root DirectoryIndex for the domain,
1209                 # $href here would be something like http://gitweb.example.com/
1210                 # Thus, we strip any trailing / from $href, to spare us double
1211                 # slashes in the final URL
1212                 $href =~ s,/$,,;
1213
1214                 # Then add the project name, if present
1215                 $href .= "/".esc_url($params{'project'});
1216                 delete $params{'project'};
1217
1218                 # since we destructively absorb parameters, we keep this
1219                 # boolean that remembers if we're handling a snapshot
1220                 my $is_snapshot = $params{'action'} eq 'snapshot';
1221
1222                 # Summary just uses the project path URL, any other action is
1223                 # added to the URL
1224                 if (defined $params{'action'}) {
1225                         $href .= "/".esc_url($params{'action'}) unless $params{'action'} eq 'summary';
1226                         delete $params{'action'};
1227                 }
1228
1229                 # Next, we put hash_parent_base:/file_parent..hash_base:/file_name,
1230                 # stripping nonexistent or useless pieces
1231                 $href .= "/" if ($params{'hash_base'} || $params{'hash_parent_base'}
1232                         || $params{'hash_parent'} || $params{'hash'});
1233                 if (defined $params{'hash_base'}) {
1234                         if (defined $params{'hash_parent_base'}) {
1235                                 $href .= esc_url($params{'hash_parent_base'});
1236                                 # skip the file_parent if it's the same as the file_name
1237                                 if (defined $params{'file_parent'}) {
1238                                         if (defined $params{'file_name'} && $params{'file_parent'} eq $params{'file_name'}) {
1239                                                 delete $params{'file_parent'};
1240                                         } elsif ($params{'file_parent'} !~ /\.\./) {
1241                                                 $href .= ":/".esc_url($params{'file_parent'});
1242                                                 delete $params{'file_parent'};
1243                                         }
1244                                 }
1245                                 $href .= "..";
1246                                 delete $params{'hash_parent'};
1247                                 delete $params{'hash_parent_base'};
1248                         } elsif (defined $params{'hash_parent'}) {
1249                                 $href .= esc_url($params{'hash_parent'}). "..";
1250                                 delete $params{'hash_parent'};
1251                         }
1252
1253                         $href .= esc_url($params{'hash_base'});
1254                         if (defined $params{'file_name'} && $params{'file_name'} !~ /\.\./) {
1255                                 $href .= ":/".esc_url($params{'file_name'});
1256                                 delete $params{'file_name'};
1257                         }
1258                         delete $params{'hash'};
1259                         delete $params{'hash_base'};
1260                 } elsif (defined $params{'hash'}) {
1261                         $href .= esc_url($params{'hash'});
1262                         delete $params{'hash'};
1263                 }
1264
1265                 # If the action was a snapshot, we can absorb the
1266                 # snapshot_format parameter too
1267                 if ($is_snapshot) {
1268                         my $fmt = $params{'snapshot_format'};
1269                         # snapshot_format should always be defined when href()
1270                         # is called, but just in case some code forgets, we
1271                         # fall back to the default
1272                         $fmt ||= $snapshot_fmts[0];
1273                         $href .= $known_snapshot_formats{$fmt}{'suffix'};
1274                         delete $params{'snapshot_format'};
1275                 }
1276         }
1277
1278         # now encode the parameters explicitly
1279         my @result = ();
1280         for (my $i = 0; $i < @cgi_param_mapping; $i += 2) {
1281                 my ($name, $symbol) = ($cgi_param_mapping[$i], $cgi_param_mapping[$i+1]);
1282                 if (defined $params{$name}) {
1283                         if (ref($params{$name}) eq "ARRAY") {
1284                                 foreach my $par (@{$params{$name}}) {
1285                                         push @result, $symbol . "=" . esc_param($par);
1286                                 }
1287                         } else {
1288                                 push @result, $symbol . "=" . esc_param($params{$name});
1289                         }
1290                 }
1291         }
1292         $href .= "?" . join(';', @result) if scalar @result;
1293
1294         return $href;
1295 }
1296
1297
1298 ## ======================================================================
1299 ## validation, quoting/unquoting and escaping
1300
1301 sub validate_action {
1302         my $input = shift || return undef;
1303         return undef unless exists $actions{$input};
1304         return $input;
1305 }
1306
1307 sub validate_project {
1308         my $input = shift || return undef;
1309         if (!validate_pathname($input) ||
1310                 !(-d "$projectroot/$input") ||
1311                 !check_export_ok("$projectroot/$input") ||
1312                 ($strict_export && !project_in_list($input))) {
1313                 return undef;
1314         } else {
1315                 return $input;
1316         }
1317 }
1318
1319 sub validate_pathname {
1320         my $input = shift || return undef;
1321
1322         # no '.' or '..' as elements of path, i.e. no '.' nor '..'
1323         # at the beginning, at the end, and between slashes.
1324         # also this catches doubled slashes
1325         if ($input =~ m!(^|/)(|\.|\.\.)(/|$)!) {
1326                 return undef;
1327         }
1328         # no null characters
1329         if ($input =~ m!\0!) {
1330                 return undef;
1331         }
1332         return $input;
1333 }
1334
1335 sub validate_refname {
1336         my $input = shift || return undef;
1337
1338         # textual hashes are O.K.
1339         if ($input =~ m/^[0-9a-fA-F]{40}$/) {
1340                 return $input;
1341         }
1342         # it must be correct pathname
1343         $input = validate_pathname($input)
1344                 or return undef;
1345         # restrictions on ref name according to git-check-ref-format
1346         if ($input =~ m!(/\.|\.\.|[\000-\040\177 ~^:?*\[]|/$)!) {
1347                 return undef;
1348         }
1349         return $input;
1350 }
1351
1352 # decode sequences of octets in utf8 into Perl's internal form,
1353 # which is utf-8 with utf8 flag set if needed.  gitweb writes out
1354 # in utf-8 thanks to "binmode STDOUT, ':utf8'" at beginning
1355 sub to_utf8 {
1356         my $str = shift;
1357         return undef unless defined $str;
1358         if (utf8::valid($str)) {
1359                 utf8::decode($str);
1360                 return $str;
1361         } else {
1362                 return decode($fallback_encoding, $str, Encode::FB_DEFAULT);
1363         }
1364 }
1365
1366 # quote unsafe chars, but keep the slash, even when it's not
1367 # correct, but quoted slashes look too horrible in bookmarks
1368 sub esc_param {
1369         my $str = shift;
1370         return undef unless defined $str;
1371         $str =~ s/([^A-Za-z0-9\-_.~()\/:@ ]+)/CGI::escape($1)/eg;
1372         $str =~ s/ /\+/g;
1373         return $str;
1374 }
1375
1376 # quote unsafe chars in whole URL, so some characters cannot be quoted
1377 sub esc_url {
1378         my $str = shift;
1379         return undef unless defined $str;
1380         $str =~ s/([^A-Za-z0-9\-_.~();\/;?:@&= ]+)/CGI::escape($1)/eg;
1381         $str =~ s/ /\+/g;
1382         return $str;
1383 }
1384
1385 # replace invalid utf8 character with SUBSTITUTION sequence
1386 sub esc_html {
1387         my $str = shift;
1388         my %opts = @_;
1389
1390         return undef unless defined $str;
1391
1392         $str = to_utf8($str);
1393         $str = $cgi->escapeHTML($str);
1394         if ($opts{'-nbsp'}) {
1395                 $str =~ s/ /&nbsp;/g;
1396         }
1397         $str =~ s|([[:cntrl:]])|(($1 ne "\t") ? quot_cec($1) : $1)|eg;
1398         return $str;
1399 }
1400
1401 # quote control characters and escape filename to HTML
1402 sub esc_path {
1403         my $str = shift;
1404         my %opts = @_;
1405
1406         return undef unless defined $str;
1407
1408         $str = to_utf8($str);
1409         $str = $cgi->escapeHTML($str);
1410         if ($opts{'-nbsp'}) {
1411                 $str =~ s/ /&nbsp;/g;
1412         }
1413         $str =~ s|([[:cntrl:]])|quot_cec($1)|eg;
1414         return $str;
1415 }
1416
1417 # Make control characters "printable", using character escape codes (CEC)
1418 sub quot_cec {
1419         my $cntrl = shift;
1420         my %opts = @_;
1421         my %es = ( # character escape codes, aka escape sequences
1422                 "\t" => '\t',   # tab            (HT)
1423                 "\n" => '\n',   # line feed      (LF)
1424                 "\r" => '\r',   # carrige return (CR)
1425                 "\f" => '\f',   # form feed      (FF)
1426                 "\b" => '\b',   # backspace      (BS)
1427                 "\a" => '\a',   # alarm (bell)   (BEL)
1428                 "\e" => '\e',   # escape         (ESC)
1429                 "\013" => '\v', # vertical tab   (VT)
1430                 "\000" => '\0', # nul character  (NUL)
1431         );
1432         my $chr = ( (exists $es{$cntrl})
1433                     ? $es{$cntrl}
1434                     : sprintf('\%2x', ord($cntrl)) );
1435         if ($opts{-nohtml}) {
1436                 return $chr;
1437         } else {
1438                 return "<span class=\"cntrl\">$chr</span>";
1439         }
1440 }
1441
1442 # Alternatively use unicode control pictures codepoints,
1443 # Unicode "printable representation" (PR)
1444 sub quot_upr {
1445         my $cntrl = shift;
1446         my %opts = @_;
1447
1448         my $chr = sprintf('&#%04d;', 0x2400+ord($cntrl));
1449         if ($opts{-nohtml}) {
1450                 return $chr;
1451         } else {
1452                 return "<span class=\"cntrl\">$chr</span>";
1453         }
1454 }
1455
1456 # git may return quoted and escaped filenames
1457 sub unquote {
1458         my $str = shift;
1459
1460         sub unq {
1461                 my $seq = shift;
1462                 my %es = ( # character escape codes, aka escape sequences
1463                         't' => "\t",   # tab            (HT, TAB)
1464                         'n' => "\n",   # newline        (NL)
1465                         'r' => "\r",   # return         (CR)
1466                         'f' => "\f",   # form feed      (FF)
1467                         'b' => "\b",   # backspace      (BS)
1468                         'a' => "\a",   # alarm (bell)   (BEL)
1469                         'e' => "\e",   # escape         (ESC)
1470                         'v' => "\013", # vertical tab   (VT)
1471                 );
1472
1473                 if ($seq =~ m/^[0-7]{1,3}$/) {
1474                         # octal char sequence
1475                         return chr(oct($seq));
1476                 } elsif (exists $es{$seq}) {
1477                         # C escape sequence, aka character escape code
1478                         return $es{$seq};
1479                 }
1480                 # quoted ordinary character
1481                 return $seq;
1482         }
1483
1484         if ($str =~ m/^"(.*)"$/) {
1485                 # needs unquoting
1486                 $str = $1;
1487                 $str =~ s/\\([^0-7]|[0-7]{1,3})/unq($1)/eg;
1488         }
1489         return $str;
1490 }
1491
1492 # escape tabs (convert tabs to spaces)
1493 sub untabify {
1494         my $line = shift;
1495
1496         while ((my $pos = index($line, "\t")) != -1) {
1497                 if (my $count = (8 - ($pos % 8))) {
1498                         my $spaces = ' ' x $count;
1499                         $line =~ s/\t/$spaces/;
1500                 }
1501         }
1502
1503         return $line;
1504 }
1505
1506 sub project_in_list {
1507         my $project = shift;
1508         my @list = git_get_projects_list();
1509         return @list && scalar(grep { $_->{'path'} eq $project } @list);
1510 }
1511
1512 ## ----------------------------------------------------------------------
1513 ## HTML aware string manipulation
1514
1515 # Try to chop given string on a word boundary between position
1516 # $len and $len+$add_len. If there is no word boundary there,
1517 # chop at $len+$add_len. Do not chop if chopped part plus ellipsis
1518 # (marking chopped part) would be longer than given string.
1519 sub chop_str {
1520         my $str = shift;
1521         my $len = shift;
1522         my $add_len = shift || 10;
1523         my $where = shift || 'right'; # 'left' | 'center' | 'right'
1524
1525         # Make sure perl knows it is utf8 encoded so we don't
1526         # cut in the middle of a utf8 multibyte char.
1527         $str = to_utf8($str);
1528
1529         # allow only $len chars, but don't cut a word if it would fit in $add_len
1530         # if it doesn't fit, cut it if it's still longer than the dots we would add
1531         # remove chopped character entities entirely
1532
1533         # when chopping in the middle, distribute $len into left and right part
1534         # return early if chopping wouldn't make string shorter
1535         if ($where eq 'center') {
1536                 return $str if ($len + 5 >= length($str)); # filler is length 5
1537                 $len = int($len/2);
1538         } else {
1539                 return $str if ($len + 4 >= length($str)); # filler is length 4
1540         }
1541
1542         # regexps: ending and beginning with word part up to $add_len
1543         my $endre = qr/.{$len}\w{0,$add_len}/;
1544         my $begre = qr/\w{0,$add_len}.{$len}/;
1545
1546         if ($where eq 'left') {
1547                 $str =~ m/^(.*?)($begre)$/;
1548                 my ($lead, $body) = ($1, $2);
1549                 if (length($lead) > 4) {
1550                         $lead = " ...";
1551                 }
1552                 return "$lead$body";
1553
1554         } elsif ($where eq 'center') {
1555                 $str =~ m/^($endre)(.*)$/;
1556                 my ($left, $str)  = ($1, $2);
1557                 $str =~ m/^(.*?)($begre)$/;
1558                 my ($mid, $right) = ($1, $2);
1559                 if (length($mid) > 5) {
1560                         $mid = " ... ";
1561                 }
1562                 return "$left$mid$right";
1563
1564         } else {
1565                 $str =~ m/^($endre)(.*)$/;
1566                 my $body = $1;
1567                 my $tail = $2;
1568                 if (length($tail) > 4) {
1569                         $tail = "... ";
1570                 }
1571                 return "$body$tail";
1572         }
1573 }
1574
1575 # takes the same arguments as chop_str, but also wraps a <span> around the
1576 # result with a title attribute if it does get chopped. Additionally, the
1577 # string is HTML-escaped.
1578 sub chop_and_escape_str {
1579         my ($str) = @_;
1580
1581         my $chopped = chop_str(@_);
1582         if ($chopped eq $str) {
1583                 return esc_html($chopped);
1584         } else {
1585                 $str =~ s/[[:cntrl:]]/?/g;
1586                 return $cgi->span({-title=>$str}, esc_html($chopped));
1587         }
1588 }
1589
1590 ## ----------------------------------------------------------------------
1591 ## functions returning short strings
1592
1593 # CSS class for given age value (in seconds)
1594 sub age_class {
1595         my $age = shift;
1596
1597         if (!defined $age) {
1598                 return "noage";
1599         } elsif ($age < 60*60*2) {
1600                 return "age0";
1601         } elsif ($age < 60*60*24*2) {
1602                 return "age1";
1603         } else {
1604                 return "age2";
1605         }
1606 }
1607
1608 # convert age in seconds to "nn units ago" string
1609 sub age_string {
1610         my $age = shift;
1611         my $age_str;
1612
1613         if ($age > 60*60*24*365*2) {
1614                 $age_str = (int $age/60/60/24/365);
1615                 $age_str .= " years ago";
1616         } elsif ($age > 60*60*24*(365/12)*2) {
1617                 $age_str = int $age/60/60/24/(365/12);
1618                 $age_str .= " months ago";
1619         } elsif ($age > 60*60*24*7*2) {
1620                 $age_str = int $age/60/60/24/7;
1621                 $age_str .= " weeks ago";
1622         } elsif ($age > 60*60*24*2) {
1623                 $age_str = int $age/60/60/24;
1624                 $age_str .= " days ago";
1625         } elsif ($age > 60*60*2) {
1626                 $age_str = int $age/60/60;
1627                 $age_str .= " hours ago";
1628         } elsif ($age > 60*2) {
1629                 $age_str = int $age/60;
1630                 $age_str .= " min ago";
1631         } elsif ($age > 2) {
1632                 $age_str = int $age;
1633                 $age_str .= " sec ago";
1634         } else {
1635                 $age_str .= " right now";
1636         }
1637         return $age_str;
1638 }
1639
1640 use constant {
1641         S_IFINVALID => 0030000,
1642         S_IFGITLINK => 0160000,
1643 };
1644
1645 # submodule/subproject, a commit object reference
1646 sub S_ISGITLINK {
1647         my $mode = shift;
1648
1649         return (($mode & S_IFMT) == S_IFGITLINK)
1650 }
1651
1652 # convert file mode in octal to symbolic file mode string
1653 sub mode_str {
1654         my $mode = oct shift;
1655
1656         if (S_ISGITLINK($mode)) {
1657                 return 'm---------';
1658         } elsif (S_ISDIR($mode & S_IFMT)) {
1659                 return 'drwxr-xr-x';
1660         } elsif (S_ISLNK($mode)) {
1661                 return 'lrwxrwxrwx';
1662         } elsif (S_ISREG($mode)) {
1663                 # git cares only about the executable bit
1664                 if ($mode & S_IXUSR) {
1665                         return '-rwxr-xr-x';
1666                 } else {
1667                         return '-rw-r--r--';
1668                 };
1669         } else {
1670                 return '----------';
1671         }
1672 }
1673
1674 # convert file mode in octal to file type string
1675 sub file_type {
1676         my $mode = shift;
1677
1678         if ($mode !~ m/^[0-7]+$/) {
1679                 return $mode;
1680         } else {
1681                 $mode = oct $mode;
1682         }
1683
1684         if (S_ISGITLINK($mode)) {
1685                 return "submodule";
1686         } elsif (S_ISDIR($mode & S_IFMT)) {
1687                 return "directory";
1688         } elsif (S_ISLNK($mode)) {
1689                 return "symlink";
1690         } elsif (S_ISREG($mode)) {
1691                 return "file";
1692         } else {
1693                 return "unknown";
1694         }
1695 }
1696
1697 # convert file mode in octal to file type description string
1698 sub file_type_long {
1699         my $mode = shift;
1700
1701         if ($mode !~ m/^[0-7]+$/) {
1702                 return $mode;
1703         } else {
1704                 $mode = oct $mode;
1705         }
1706
1707         if (S_ISGITLINK($mode)) {
1708                 return "submodule";
1709         } elsif (S_ISDIR($mode & S_IFMT)) {
1710                 return "directory";
1711         } elsif (S_ISLNK($mode)) {
1712                 return "symlink";
1713         } elsif (S_ISREG($mode)) {
1714                 if ($mode & S_IXUSR) {
1715                         return "executable";
1716                 } else {
1717                         return "file";
1718                 };
1719         } else {
1720                 return "unknown";
1721         }
1722 }
1723
1724
1725 ## ----------------------------------------------------------------------
1726 ## functions returning short HTML fragments, or transforming HTML fragments
1727 ## which don't belong to other sections
1728
1729 # format line of commit message.
1730 sub format_log_line_html {
1731         my $line = shift;
1732
1733         $line = esc_html($line, -nbsp=>1);
1734         $line =~ s{\b([0-9a-fA-F]{8,40})\b}{
1735                 $cgi->a({-href => href(action=>"object", hash=>$1),
1736                                         -class => "text"}, $1);
1737         }eg;
1738
1739         return $line;
1740 }
1741
1742 # format marker of refs pointing to given object
1743
1744 # the destination action is chosen based on object type and current context:
1745 # - for annotated tags, we choose the tag view unless it's the current view
1746 #   already, in which case we go to shortlog view
1747 # - for other refs, we keep the current view if we're in history, shortlog or
1748 #   log view, and select shortlog otherwise
1749 sub format_ref_marker {
1750         my ($refs, $id) = @_;
1751         my $markers = '';
1752
1753         if (defined $refs->{$id}) {
1754                 foreach my $ref (@{$refs->{$id}}) {
1755                         # this code exploits the fact that non-lightweight tags are the
1756                         # only indirect objects, and that they are the only objects for which
1757                         # we want to use tag instead of shortlog as action
1758                         my ($type, $name) = qw();
1759                         my $indirect = ($ref =~ s/\^\{\}$//);
1760                         # e.g. tags/v2.6.11 or heads/next
1761                         if ($ref =~ m!^(.*?)s?/(.*)$!) {
1762                                 $type = $1;
1763                                 $name = $2;
1764                         } else {
1765                                 $type = "ref";
1766                                 $name = $ref;
1767                         }
1768
1769                         my $class = $type;
1770                         $class .= " indirect" if $indirect;
1771
1772                         my $dest_action = "shortlog";
1773
1774                         if ($indirect) {
1775                                 $dest_action = "tag" unless $action eq "tag";
1776                         } elsif ($action =~ /^(history|(short)?log)$/) {
1777                                 $dest_action = $action;
1778                         }
1779
1780                         my $dest = "";
1781                         $dest .= "refs/" unless $ref =~ m!^refs/!;
1782                         $dest .= $ref;
1783
1784                         my $link = $cgi->a({
1785                                 -href => href(
1786                                         action=>$dest_action,
1787                                         hash=>$dest
1788                                 )}, $name);
1789
1790                         $markers .= " <span class=\"$class\" title=\"$ref\">" .
1791                                 $link . "</span>";
1792                 }
1793         }
1794
1795         if ($markers) {
1796                 return ' <span class="refs">'. $markers . '</span>';
1797         } else {
1798                 return "";
1799         }
1800 }
1801
1802 # format, perhaps shortened and with markers, title line
1803 sub format_subject_html {
1804         my ($long, $short, $href, $extra) = @_;
1805         $extra = '' unless defined($extra);
1806
1807         if (length($short) < length($long)) {
1808                 $long =~ s/[[:cntrl:]]/?/g;
1809                 return $cgi->a({-href => $href, -class => "list subject",
1810                                 -title => to_utf8($long)},
1811                        esc_html($short)) . $extra;
1812         } else {
1813                 return $cgi->a({-href => $href, -class => "list subject"},
1814                        esc_html($long)) . $extra;
1815         }
1816 }
1817
1818 # Rather than recomputing the url for an email multiple times, we cache it
1819 # after the first hit. This gives a visible benefit in views where the avatar
1820 # for the same email is used repeatedly (e.g. shortlog).
1821 # The cache is shared by all avatar engines (currently gravatar only), which
1822 # are free to use it as preferred. Since only one avatar engine is used for any
1823 # given page, there's no risk for cache conflicts.
1824 our %avatar_cache = ();
1825
1826 # Compute the picon url for a given email, by using the picon search service over at
1827 # http://www.cs.indiana.edu/picons/search.html
1828 sub picon_url {
1829         my $email = lc shift;
1830         if (!$avatar_cache{$email}) {
1831                 my ($user, $domain) = split('@', $email);
1832                 $avatar_cache{$email} =
1833                         "http://www.cs.indiana.edu/cgi-pub/kinzler/piconsearch.cgi/" .
1834                         "$domain/$user/" .
1835                         "users+domains+unknown/up/single";
1836         }
1837         return $avatar_cache{$email};
1838 }
1839
1840 # Compute the gravatar url for a given email, if it's not in the cache already.
1841 # Gravatar stores only the part of the URL before the size, since that's the
1842 # one computationally more expensive. This also allows reuse of the cache for
1843 # different sizes (for this particular engine).
1844 sub gravatar_url {
1845         my $email = lc shift;
1846         my $size = shift;
1847         $avatar_cache{$email} ||=
1848                 "http://www.gravatar.com/avatar/" .
1849                         Digest::MD5::md5_hex($email) . "?s=";
1850         return $avatar_cache{$email} . $size;
1851 }
1852
1853 # Insert an avatar for the given $email at the given $size if the feature
1854 # is enabled.
1855 sub git_get_avatar {
1856         my ($email, %opts) = @_;
1857         my $pre_white  = ($opts{-pad_before} ? "&nbsp;" : "");
1858         my $post_white = ($opts{-pad_after}  ? "&nbsp;" : "");
1859         $opts{-size} ||= 'default';
1860         my $size = $avatar_size{$opts{-size}} || $avatar_size{'default'};
1861         my $url = "";
1862         if ($git_avatar eq 'gravatar') {
1863                 $url = gravatar_url($email, $size);
1864         } elsif ($git_avatar eq 'picon') {
1865                 $url = picon_url($email);
1866         }
1867         # Other providers can be added by extending the if chain, defining $url
1868         # as needed. If no variant puts something in $url, we assume avatars
1869         # are completely disabled/unavailable.
1870         if ($url) {
1871                 return $pre_white .
1872                        "<img width=\"$size\" " .
1873                             "class=\"avatar\" " .
1874                             "src=\"$url\" " .
1875                             "alt=\"\" " .
1876                        "/>" . $post_white;
1877         } else {
1878                 return "";
1879         }
1880 }
1881
1882 sub format_search_author {
1883         my ($author, $searchtype, $displaytext) = @_;
1884         my $have_search = gitweb_check_feature('search');
1885
1886         if ($have_search) {
1887                 my $performed = "";
1888                 if ($searchtype eq 'author') {
1889                         $performed = "authored";
1890                 } elsif ($searchtype eq 'committer') {
1891                         $performed = "committed";
1892                 }
1893
1894                 return $cgi->a({-href => href(action=>"search", hash=>$hash,
1895                                 searchtext=>$author,
1896                                 searchtype=>$searchtype), class=>"list",
1897                                 title=>"Search for commits $performed by $author"},
1898                                 $displaytext);
1899
1900         } else {
1901                 return $displaytext;
1902         }
1903 }
1904
1905 # format the author name of the given commit with the given tag
1906 # the author name is chopped and escaped according to the other
1907 # optional parameters (see chop_str).
1908 sub format_author_html {
1909         my $tag = shift;
1910         my $co = shift;
1911         my $author = chop_and_escape_str($co->{'author_name'}, @_);
1912         return "<$tag class=\"author\">" .
1913                format_search_author($co->{'author_name'}, "author",
1914                        git_get_avatar($co->{'author_email'}, -pad_after => 1) .
1915                        $author) .
1916                "</$tag>";
1917 }
1918
1919 # format git diff header line, i.e. "diff --(git|combined|cc) ..."
1920 sub format_git_diff_header_line {
1921         my $line = shift;
1922         my $diffinfo = shift;
1923         my ($from, $to) = @_;
1924
1925         if ($diffinfo->{'nparents'}) {
1926                 # combined diff
1927                 $line =~ s!^(diff (.*?) )"?.*$!$1!;
1928                 if ($to->{'href'}) {
1929                         $line .= $cgi->a({-href => $to->{'href'}, -class => "path"},
1930                                          esc_path($to->{'file'}));
1931                 } else { # file was deleted (no href)
1932                         $line .= esc_path($to->{'file'});
1933                 }
1934         } else {
1935                 # "ordinary" diff
1936                 $line =~ s!^(diff (.*?) )"?a/.*$!$1!;
1937                 if ($from->{'href'}) {
1938                         $line .= $cgi->a({-href => $from->{'href'}, -class => "path"},
1939                                          'a/' . esc_path($from->{'file'}));
1940                 } else { # file was added (no href)
1941                         $line .= 'a/' . esc_path($from->{'file'});
1942                 }
1943                 $line .= ' ';
1944                 if ($to->{'href'}) {
1945                         $line .= $cgi->a({-href => $to->{'href'}, -class => "path"},
1946                                          'b/' . esc_path($to->{'file'}));
1947                 } else { # file was deleted
1948                         $line .= 'b/' . esc_path($to->{'file'});
1949                 }
1950         }
1951
1952         return "<div class=\"diff header\">$line</div>\n";
1953 }
1954
1955 # format extended diff header line, before patch itself
1956 sub format_extended_diff_header_line {
1957         my $line = shift;
1958         my $diffinfo = shift;
1959         my ($from, $to) = @_;
1960
1961         # match <path>
1962         if ($line =~ s!^((copy|rename) from ).*$!$1! && $from->{'href'}) {
1963                 $line .= $cgi->a({-href=>$from->{'href'}, -class=>"path"},
1964                                        esc_path($from->{'file'}));
1965         }
1966         if ($line =~ s!^((copy|rename) to ).*$!$1! && $to->{'href'}) {
1967                 $line .= $cgi->a({-href=>$to->{'href'}, -class=>"path"},
1968                                  esc_path($to->{'file'}));
1969         }
1970         # match single <mode>
1971         if ($line =~ m/\s(\d{6})$/) {
1972                 $line .= '<span class="info"> (' .
1973                          file_type_long($1) .
1974                          ')</span>';
1975         }
1976         # match <hash>
1977         if ($line =~ m/^index [0-9a-fA-F]{40},[0-9a-fA-F]{40}/) {
1978                 # can match only for combined diff
1979                 $line = 'index ';
1980                 for (my $i = 0; $i < $diffinfo->{'nparents'}; $i++) {
1981                         if ($from->{'href'}[$i]) {
1982                                 $line .= $cgi->a({-href=>$from->{'href'}[$i],
1983                                                   -class=>"hash"},
1984                                                  substr($diffinfo->{'from_id'}[$i],0,7));
1985                         } else {
1986                                 $line .= '0' x 7;
1987                         }
1988                         # separator
1989                         $line .= ',' if ($i < $diffinfo->{'nparents'} - 1);
1990                 }
1991                 $line .= '..';
1992                 if ($to->{'href'}) {
1993                         $line .= $cgi->a({-href=>$to->{'href'}, -class=>"hash"},
1994                                          substr($diffinfo->{'to_id'},0,7));
1995                 } else {
1996                         $line .= '0' x 7;
1997                 }
1998
1999         } elsif ($line =~ m/^index [0-9a-fA-F]{40}..[0-9a-fA-F]{40}/) {
2000                 # can match only for ordinary diff
2001                 my ($from_link, $to_link);
2002                 if ($from->{'href'}) {
2003                         $from_link = $cgi->a({-href=>$from->{'href'}, -class=>"hash"},
2004                                              substr($diffinfo->{'from_id'},0,7));
2005                 } else {
2006                         $from_link = '0' x 7;
2007                 }
2008                 if ($to->{'href'}) {
2009                         $to_link = $cgi->a({-href=>$to->{'href'}, -class=>"hash"},
2010                                            substr($diffinfo->{'to_id'},0,7));
2011                 } else {
2012                         $to_link = '0' x 7;
2013                 }
2014                 my ($from_id, $to_id) = ($diffinfo->{'from_id'}, $diffinfo->{'to_id'});
2015                 $line =~ s!$from_id\.\.$to_id!$from_link..$to_link!;
2016         }
2017
2018         return $line . "<br/>\n";
2019 }
2020
2021 # format from-file/to-file diff header
2022 sub format_diff_from_to_header {
2023         my ($from_line, $to_line, $diffinfo, $from, $to, @parents) = @_;
2024         my $line;
2025         my $result = '';
2026
2027         $line = $from_line;
2028         #assert($line =~ m/^---/) if DEBUG;
2029         # no extra formatting for "^--- /dev/null"
2030         if (! $diffinfo->{'nparents'}) {
2031                 # ordinary (single parent) diff
2032                 if ($line =~ m!^--- "?a/!) {
2033                         if ($from->{'href'}) {
2034                                 $line = '--- a/' .
2035                                         $cgi->a({-href=>$from->{'href'}, -class=>"path"},
2036                                                 esc_path($from->{'file'}));
2037                         } else {
2038                                 $line = '--- a/' .
2039                                         esc_path($from->{'file'});
2040                         }
2041                 }
2042                 $result .= qq!<div class="diff from_file">$line</div>\n!;
2043
2044         } else {
2045                 # combined diff (merge commit)
2046                 for (my $i = 0; $i < $diffinfo->{'nparents'}; $i++) {
2047                         if ($from->{'href'}[$i]) {
2048                                 $line = '--- ' .
2049                                         $cgi->a({-href=>href(action=>"blobdiff",
2050                                                              hash_parent=>$diffinfo->{'from_id'}[$i],
2051                                                              hash_parent_base=>$parents[$i],
2052                                                              file_parent=>$from->{'file'}[$i],
2053                                                              hash=>$diffinfo->{'to_id'},
2054                                                              hash_base=>$hash,
2055                                                              file_name=>$to->{'file'}),
2056                                                  -class=>"path",
2057                                                  -title=>"diff" . ($i+1)},
2058                                                 $i+1) .
2059                                         '/' .
2060                                         $cgi->a({-href=>$from->{'href'}[$i], -class=>"path"},
2061                                                 esc_path($from->{'file'}[$i]));
2062                         } else {
2063                                 $line = '--- /dev/null';
2064                         }
2065                         $result .= qq!<div class="diff from_file">$line</div>\n!;
2066                 }
2067         }
2068
2069         $line = $to_line;
2070         #assert($line =~ m/^\+\+\+/) if DEBUG;
2071         # no extra formatting for "^+++ /dev/null"
2072         if ($line =~ m!^\+\+\+ "?b/!) {
2073                 if ($to->{'href'}) {
2074                         $line = '+++ b/' .
2075                                 $cgi->a({-href=>$to->{'href'}, -class=>"path"},
2076                                         esc_path($to->{'file'}));
2077                 } else {
2078                         $line = '+++ b/' .
2079                                 esc_path($to->{'file'});
2080                 }
2081         }
2082         $result .= qq!<div class="diff to_file">$line</div>\n!;
2083
2084         return $result;
2085 }
2086
2087 # create note for patch simplified by combined diff
2088 sub format_diff_cc_simplified {
2089         my ($diffinfo, @parents) = @_;
2090         my $result = '';
2091
2092         $result .= "<div class=\"diff header\">" .
2093                    "diff --cc ";
2094         if (!is_deleted($diffinfo)) {
2095                 $result .= $cgi->a({-href => href(action=>"blob",
2096                                                   hash_base=>$hash,
2097                                                   hash=>$diffinfo->{'to_id'},
2098                                                   file_name=>$diffinfo->{'to_file'}),
2099                                     -class => "path"},
2100                                    esc_path($diffinfo->{'to_file'}));
2101         } else {
2102                 $result .= esc_path($diffinfo->{'to_file'});
2103         }
2104         $result .= "</div>\n" . # class="diff header"
2105                    "<div class=\"diff nodifferences\">" .
2106                    "Simple merge" .
2107                    "</div>\n"; # class="diff nodifferences"
2108
2109         return $result;
2110 }
2111
2112 # format patch (diff) line (not to be used for diff headers)
2113 sub format_diff_line {
2114         my $line = shift;
2115         my ($from, $to) = @_;
2116         my $diff_class = "";
2117
2118         chomp $line;
2119
2120         if ($from && $to && ref($from->{'href'}) eq "ARRAY") {
2121                 # combined diff
2122                 my $prefix = substr($line, 0, scalar @{$from->{'href'}});
2123                 if ($line =~ m/^\@{3}/) {
2124                         $diff_class = " chunk_header";
2125                 } elsif ($line =~ m/^\\/) {
2126                         $diff_class = " incomplete";
2127                 } elsif ($prefix =~ tr/+/+/) {
2128                         $diff_class = " add";
2129                 } elsif ($prefix =~ tr/-/-/) {
2130                         $diff_class = " rem";
2131                 }
2132         } else {
2133                 # assume ordinary diff
2134                 my $char = substr($line, 0, 1);
2135                 if ($char eq '+') {
2136                         $diff_class = " add";
2137                 } elsif ($char eq '-') {
2138                         $diff_class = " rem";
2139                 } elsif ($char eq '@') {
2140                         $diff_class = " chunk_header";
2141                 } elsif ($char eq "\\") {
2142                         $diff_class = " incomplete";
2143                 }
2144         }
2145         $line = untabify($line);
2146         if ($from && $to && $line =~ m/^\@{2} /) {
2147                 my ($from_text, $from_start, $from_lines, $to_text, $to_start, $to_lines, $section) =
2148                         $line =~ m/^\@{2} (-(\d+)(?:,(\d+))?) (\+(\d+)(?:,(\d+))?) \@{2}(.*)$/;
2149
2150                 $from_lines = 0 unless defined $from_lines;
2151                 $to_lines   = 0 unless defined $to_lines;
2152
2153                 if ($from->{'href'}) {
2154                         $from_text = $cgi->a({-href=>"$from->{'href'}#l$from_start",
2155                                              -class=>"list"}, $from_text);
2156                 }
2157                 if ($to->{'href'}) {
2158                         $to_text   = $cgi->a({-href=>"$to->{'href'}#l$to_start",
2159                                              -class=>"list"}, $to_text);
2160                 }
2161                 $line = "<span class=\"chunk_info\">@@ $from_text $to_text @@</span>" .
2162                         "<span class=\"section\">" . esc_html($section, -nbsp=>1) . "</span>";
2163                 return "<div class=\"diff$diff_class\">$line</div>\n";
2164         } elsif ($from && $to && $line =~ m/^\@{3}/) {
2165                 my ($prefix, $ranges, $section) = $line =~ m/^(\@+) (.*?) \@+(.*)$/;
2166                 my (@from_text, @from_start, @from_nlines, $to_text, $to_start, $to_nlines);
2167
2168                 @from_text = split(' ', $ranges);
2169                 for (my $i = 0; $i < @from_text; ++$i) {
2170                         ($from_start[$i], $from_nlines[$i]) =
2171                                 (split(',', substr($from_text[$i], 1)), 0);
2172                 }
2173
2174                 $to_text   = pop @from_text;
2175                 $to_start  = pop @from_start;
2176                 $to_nlines = pop @from_nlines;
2177
2178                 $line = "<span class=\"chunk_info\">$prefix ";
2179                 for (my $i = 0; $i < @from_text; ++$i) {
2180                         if ($from->{'href'}[$i]) {
2181                                 $line .= $cgi->a({-href=>"$from->{'href'}[$i]#l$from_start[$i]",
2182                                                   -class=>"list"}, $from_text[$i]);
2183                         } else {
2184                                 $line .= $from_text[$i];
2185                         }
2186                         $line .= " ";
2187                 }
2188                 if ($to->{'href'}) {
2189                         $line .= $cgi->a({-href=>"$to->{'href'}#l$to_start",
2190                                           -class=>"list"}, $to_text);
2191                 } else {
2192                         $line .= $to_text;
2193                 }
2194                 $line .= " $prefix</span>" .
2195                          "<span class=\"section\">" . esc_html($section, -nbsp=>1) . "</span>";
2196                 return "<div class=\"diff$diff_class\">$line</div>\n";
2197         }
2198         return "<div class=\"diff$diff_class\">" . esc_html($line, -nbsp=>1) . "</div>\n";
2199 }
2200
2201 # Generates undef or something like "_snapshot_" or "snapshot (_tbz2_ _zip_)",
2202 # linked.  Pass the hash of the tree/commit to snapshot.
2203 sub format_snapshot_links {
2204         my ($hash) = @_;
2205         my $num_fmts = @snapshot_fmts;
2206         if ($num_fmts > 1) {
2207                 # A parenthesized list of links bearing format names.
2208                 # e.g. "snapshot (_tar.gz_ _zip_)"
2209                 return "snapshot (" . join(' ', map
2210                         $cgi->a({
2211                                 -href => href(
2212                                         action=>"snapshot",
2213                                         hash=>$hash,
2214                                         snapshot_format=>$_
2215                                 )
2216                         }, $known_snapshot_formats{$_}{'display'})
2217                 , @snapshot_fmts) . ")";
2218         } elsif ($num_fmts == 1) {
2219                 # A single "snapshot" link whose tooltip bears the format name.
2220                 # i.e. "_snapshot_"
2221                 my ($fmt) = @snapshot_fmts;
2222                 return
2223                         $cgi->a({
2224                                 -href => href(
2225                                         action=>"snapshot",
2226                                         hash=>$hash,
2227                                         snapshot_format=>$fmt
2228                                 ),
2229                                 -title => "in format: $known_snapshot_formats{$fmt}{'display'}"
2230                         }, "snapshot");
2231         } else { # $num_fmts == 0
2232                 return undef;
2233         }
2234 }
2235
2236 ## ......................................................................
2237 ## functions returning values to be passed, perhaps after some
2238 ## transformation, to other functions; e.g. returning arguments to href()
2239
2240 # returns hash to be passed to href to generate gitweb URL
2241 # in -title key it returns description of link
2242 sub get_feed_info {
2243         my $format = shift || 'Atom';
2244         my %res = (action => lc($format));
2245
2246         # feed links are possible only for project views
2247         return unless (defined $project);
2248         # some views should link to OPML, or to generic project feed,
2249         # or don't have specific feed yet (so they should use generic)
2250         return if ($action =~ /^(?:tags|heads|forks|tag|search)$/x);
2251
2252         my $branch;
2253         # branches refs uses 'refs/heads/' prefix (fullname) to differentiate
2254         # from tag links; this also makes possible to detect branch links
2255         if ((defined $hash_base && $hash_base =~ m!^refs/heads/(.*)$!) ||
2256             (defined $hash      && $hash      =~ m!^refs/heads/(.*)$!)) {
2257                 $branch = $1;
2258         }
2259         # find log type for feed description (title)
2260         my $type = 'log';
2261         if (defined $file_name) {
2262                 $type  = "history of $file_name";
2263                 $type .= "/" if ($action eq 'tree');
2264                 $type .= " on '$branch'" if (defined $branch);
2265         } else {
2266                 $type = "log of $branch" if (defined $branch);
2267         }
2268
2269         $res{-title} = $type;
2270         $res{'hash'} = (defined $branch ? "refs/heads/$branch" : undef);
2271         $res{'file_name'} = $file_name;
2272
2273         return %res;
2274 }
2275
2276 ## ----------------------------------------------------------------------
2277 ## git utility subroutines, invoking git commands
2278
2279 # returns path to the core git executable and the --git-dir parameter as list
2280 sub git_cmd {
2281         $number_of_git_cmds++;
2282         return $GIT, '--git-dir='.$git_dir;
2283 }
2284
2285 # quote the given arguments for passing them to the shell
2286 # quote_command("command", "arg 1", "arg with ' and ! characters")
2287 # => "'command' 'arg 1' 'arg with '\'' and '\!' characters'"
2288 # Try to avoid using this function wherever possible.
2289 sub quote_command {
2290         return join(' ',
2291                 map { my $a = $_; $a =~ s/(['!])/'\\$1'/g; "'$a'" } @_ );
2292 }
2293
2294 # get HEAD ref of given project as hash
2295 sub git_get_head_hash {
2296         return git_get_full_hash(shift, 'HEAD');
2297 }
2298
2299 sub git_get_full_hash {
2300         return git_get_hash(@_);
2301 }
2302
2303 sub git_get_short_hash {
2304         return git_get_hash(@_, '--short=7');
2305 }
2306
2307 sub git_get_hash {
2308         my ($project, $hash, @options) = @_;
2309         my $o_git_dir = $git_dir;
2310         my $retval = undef;
2311         $git_dir = "$projectroot/$project";
2312         if (open my $fd, '-|', git_cmd(), 'rev-parse',
2313             '--verify', '-q', @options, $hash) {
2314                 $retval = <$fd>;
2315                 chomp $retval if defined $retval;
2316                 close $fd;
2317         }
2318         if (defined $o_git_dir) {
2319                 $git_dir = $o_git_dir;
2320         }
2321         return $retval;
2322 }
2323
2324 # get type of given object
2325 sub git_get_type {
2326         my $hash = shift;
2327
2328         open my $fd, "-|", git_cmd(), "cat-file", '-t', $hash or return;
2329         my $type = <$fd>;
2330         close $fd or return;
2331         chomp $type;
2332         return $type;
2333 }
2334
2335 # repository configuration
2336 our $config_file = '';
2337 our %config;
2338
2339 # store multiple values for single key as anonymous array reference
2340 # single values stored directly in the hash, not as [ <value> ]
2341 sub hash_set_multi {
2342         my ($hash, $key, $value) = @_;
2343
2344         if (!exists $hash->{$key}) {
2345                 $hash->{$key} = $value;
2346         } elsif (!ref $hash->{$key}) {
2347                 $hash->{$key} = [ $hash->{$key}, $value ];
2348         } else {
2349                 push @{$hash->{$key}}, $value;
2350         }
2351 }
2352
2353 # return hash of git project configuration
2354 # optionally limited to some section, e.g. 'gitweb'
2355 sub git_parse_project_config {
2356         my $section_regexp = shift;
2357         my %config;
2358
2359         local $/ = "\0";
2360
2361         open my $fh, "-|", git_cmd(), "config", '-z', '-l',
2362                 or return;
2363
2364         while (my $keyval = <$fh>) {
2365                 chomp $keyval;
2366                 my ($key, $value) = split(/\n/, $keyval, 2);
2367
2368                 hash_set_multi(\%config, $key, $value)
2369                         if (!defined $section_regexp || $key =~ /^(?:$section_regexp)\./o);
2370         }
2371         close $fh;
2372
2373         return %config;
2374 }
2375
2376 # convert config value to boolean: 'true' or 'false'
2377 # no value, number > 0, 'true' and 'yes' values are true
2378 # rest of values are treated as false (never as error)
2379 sub config_to_bool {
2380         my $val = shift;
2381
2382         return 1 if !defined $val;             # section.key
2383
2384         # strip leading and trailing whitespace
2385         $val =~ s/^\s+//;
2386         $val =~ s/\s+$//;
2387
2388         return (($val =~ /^\d+$/ && $val) ||   # section.key = 1
2389                 ($val =~ /^(?:true|yes)$/i));  # section.key = true
2390 }
2391
2392 # convert config value to simple decimal number
2393 # an optional value suffix of 'k', 'm', or 'g' will cause the value
2394 # to be multiplied by 1024, 1048576, or 1073741824
2395 sub config_to_int {
2396         my $val = shift;
2397
2398         # strip leading and trailing whitespace
2399         $val =~ s/^\s+//;
2400         $val =~ s/\s+$//;
2401
2402         if (my ($num, $unit) = ($val =~ /^([0-9]*)([kmg])$/i)) {
2403                 $unit = lc($unit);
2404                 # unknown unit is treated as 1
2405                 return $num * ($unit eq 'g' ? 1073741824 :
2406                                $unit eq 'm' ?    1048576 :
2407                                $unit eq 'k' ?       1024 : 1);
2408         }
2409         return $val;
2410 }
2411
2412 # convert config value to array reference, if needed
2413 sub config_to_multi {
2414         my $val = shift;
2415
2416         return ref($val) ? $val : (defined($val) ? [ $val ] : []);
2417 }
2418
2419 sub git_get_project_config {
2420         my ($key, $type) = @_;
2421
2422         return unless defined $git_dir;
2423
2424         # key sanity check
2425         return unless ($key);
2426         $key =~ s/^gitweb\.//;
2427         return if ($key =~ m/\W/);
2428
2429         # type sanity check
2430         if (defined $type) {
2431                 $type =~ s/^--//;
2432                 $type = undef
2433                         unless ($type eq 'bool' || $type eq 'int');
2434         }
2435
2436         # get config
2437         if (!defined $config_file ||
2438             $config_file ne "$git_dir/config") {
2439                 %config = git_parse_project_config('gitweb');
2440                 $config_file = "$git_dir/config";
2441         }
2442
2443         # check if config variable (key) exists
2444         return unless exists $config{"gitweb.$key"};
2445
2446         # ensure given type
2447         if (!defined $type) {
2448                 return $config{"gitweb.$key"};
2449         } elsif ($type eq 'bool') {
2450                 # backward compatibility: 'git config --bool' returns true/false
2451                 return config_to_bool($config{"gitweb.$key"}) ? 'true' : 'false';
2452         } elsif ($type eq 'int') {
2453                 return config_to_int($config{"gitweb.$key"});
2454         }
2455         return $config{"gitweb.$key"};
2456 }
2457
2458 # get hash of given path at given ref
2459 sub git_get_hash_by_path {
2460         my $base = shift;
2461         my $path = shift || return undef;
2462         my $type = shift;
2463
2464         $path =~ s,/+$,,;
2465
2466         open my $fd, "-|", git_cmd(), "ls-tree", $base, "--", $path
2467                 or die_error(500, "Open git-ls-tree failed");
2468         my $line = <$fd>;
2469         close $fd or return undef;
2470
2471         if (!defined $line) {
2472                 # there is no tree or hash given by $path at $base
2473                 return undef;
2474         }
2475
2476         #'100644 blob 0fa3f3a66fb6a137f6ec2c19351ed4d807070ffa  panic.c'
2477         $line =~ m/^([0-9]+) (.+) ([0-9a-fA-F]{40})\t/;
2478         if (defined $type && $type ne $2) {
2479                 # type doesn't match
2480                 return undef;
2481         }
2482         return $3;
2483 }
2484
2485 # get path of entry with given hash at given tree-ish (ref)
2486 # used to get 'from' filename for combined diff (merge commit) for renames
2487 sub git_get_path_by_hash {
2488         my $base = shift || return;
2489         my $hash = shift || return;
2490
2491         local $/ = "\0";
2492
2493         open my $fd, "-|", git_cmd(), "ls-tree", '-r', '-t', '-z', $base
2494                 or return undef;
2495         while (my $line = <$fd>) {
2496                 chomp $line;
2497
2498                 #'040000 tree 595596a6a9117ddba9fe379b6b012b558bac8423  gitweb'
2499                 #'100644 blob e02e90f0429be0d2a69b76571101f20b8f75530f  gitweb/README'
2500                 if ($line =~ m/(?:[0-9]+) (?:.+) $hash\t(.+)$/) {
2501                         close $fd;
2502                         return $1;
2503                 }
2504         }
2505         close $fd;
2506         return undef;
2507 }
2508
2509 ## ......................................................................
2510 ## git utility functions, directly accessing git repository
2511
2512 sub git_get_project_description {
2513         my $path = shift;
2514
2515         $git_dir = "$projectroot/$path";
2516         open my $fd, '<', "$git_dir/description"
2517                 or return git_get_project_config('description');
2518         my $descr = <$fd>;
2519         close $fd;
2520         if (defined $descr) {
2521                 chomp $descr;
2522         }
2523         return $descr;
2524 }
2525
2526 sub git_get_project_ctags {
2527         my $path = shift;
2528         my $ctags = {};
2529
2530         $git_dir = "$projectroot/$path";
2531         opendir my $dh, "$git_dir/ctags"
2532                 or return $ctags;
2533         foreach (grep { -f $_ } map { "$git_dir/ctags/$_" } readdir($dh)) {
2534                 open my $ct, '<', $_ or next;
2535                 my $val = <$ct>;
2536                 chomp $val;
2537                 close $ct;
2538                 my $ctag = $_; $ctag =~ s#.*/##;
2539                 $ctags->{$ctag} = $val;
2540         }
2541         closedir $dh;
2542         $ctags;
2543 }
2544
2545 sub git_populate_project_tagcloud {
2546         my $ctags = shift;
2547
2548         # First, merge different-cased tags; tags vote on casing
2549         my %ctags_lc;
2550         foreach (keys %$ctags) {
2551                 $ctags_lc{lc $_}->{count} += $ctags->{$_};
2552                 if (not $ctags_lc{lc $_}->{topcount}
2553                     or $ctags_lc{lc $_}->{topcount} < $ctags->{$_}) {
2554                         $ctags_lc{lc $_}->{topcount} = $ctags->{$_};
2555                         $ctags_lc{lc $_}->{topname} = $_;
2556                 }
2557         }
2558
2559         my $cloud;
2560         if (eval { require HTML::TagCloud; 1; }) {
2561                 $cloud = HTML::TagCloud->new;
2562                 foreach (sort keys %ctags_lc) {
2563                         # Pad the title with spaces so that the cloud looks
2564                         # less crammed.
2565                         my $title = $ctags_lc{$_}->{topname};
2566                         $title =~ s/ /&nbsp;/g;
2567                         $title =~ s/^/&nbsp;/g;
2568                         $title =~ s/$/&nbsp;/g;
2569                         $cloud->add($title, $home_link."?by_tag=".$_, $ctags_lc{$_}->{count});
2570                 }
2571         } else {
2572                 $cloud = \%ctags_lc;
2573         }
2574         $cloud;
2575 }
2576
2577 sub git_show_project_tagcloud {
2578         my ($cloud, $count) = @_;
2579         print STDERR ref($cloud)."..\n";
2580         if (ref $cloud eq 'HTML::TagCloud') {
2581                 return $cloud->html_and_css($count);
2582         } else {
2583                 my @tags = sort { $cloud->{$a}->{count} <=> $cloud->{$b}->{count} } keys %$cloud;
2584                 return '<p align="center">' . join (', ', map {
2585                         "<a href=\"$home_link?by_tag=$_\">$cloud->{$_}->{topname}</a>"
2586                 } splice(@tags, 0, $count)) . '</p>';
2587         }
2588 }
2589
2590 sub git_get_project_url_list {
2591         my $path = shift;
2592
2593         $git_dir = "$projectroot/$path";
2594         open my $fd, '<', "$git_dir/cloneurl"
2595                 or return wantarray ?
2596                 @{ config_to_multi(git_get_project_config('url')) } :
2597                    config_to_multi(git_get_project_config('url'));
2598         my @git_project_url_list = map { chomp; $_ } <$fd>;
2599         close $fd;
2600
2601         return wantarray ? @git_project_url_list : \@git_project_url_list;
2602 }
2603
2604 sub git_get_projects_list {
2605         my ($filter) = @_;
2606         my @list;
2607
2608         $filter ||= '';
2609         $filter =~ s/\.git$//;
2610
2611         my $check_forks = gitweb_check_feature('forks');
2612
2613         if (-d $projects_list) {
2614                 # search in directory
2615                 my $dir = $projects_list . ($filter ? "/$filter" : '');
2616                 # remove the trailing "/"
2617                 $dir =~ s!/+$!!;
2618                 my $pfxlen = length("$dir");
2619                 my $pfxdepth = ($dir =~ tr!/!!);
2620
2621                 File::Find::find({
2622                         follow_fast => 1, # follow symbolic links
2623                         follow_skip => 2, # ignore duplicates
2624                         dangling_symlinks => 0, # ignore dangling symlinks, silently
2625                         wanted => sub {
2626                                 # global variables
2627                                 our $project_maxdepth;
2628                                 our $projectroot;
2629                                 # skip project-list toplevel, if we get it.
2630                                 return if (m!^[/.]$!);
2631                                 # only directories can be git repositories
2632                                 return unless (-d $_);
2633                                 # don't traverse too deep (Find is super slow on os x)
2634                                 if (($File::Find::name =~ tr!/!!) - $pfxdepth > $project_maxdepth) {
2635                                         $File::Find::prune = 1;
2636                                         return;
2637                                 }
2638
2639                                 my $subdir = substr($File::Find::name, $pfxlen + 1);
2640                                 # we check related file in $projectroot
2641                                 my $path = ($filter ? "$filter/" : '') . $subdir;
2642                                 if (check_export_ok("$projectroot/$path")) {
2643                                         push @list, { path => $path };
2644                                         $File::Find::prune = 1;
2645                                 }
2646                         },
2647                 }, "$dir");
2648
2649         } elsif (-f $projects_list) {
2650                 # read from file(url-encoded):
2651                 # 'git%2Fgit.git Linus+Torvalds'
2652                 # 'libs%2Fklibc%2Fklibc.git H.+Peter+Anvin'
2653                 # 'linux%2Fhotplug%2Fudev.git Greg+Kroah-Hartman'
2654                 my %paths;
2655                 open my $fd, '<', $projects_list or return;
2656         PROJECT:
2657                 while (my $line = <$fd>) {
2658                         chomp $line;
2659                         my ($path, $owner) = split ' ', $line;
2660                         $path = unescape($path);
2661                         $owner = unescape($owner);
2662                         if (!defined $path) {
2663                                 next;
2664                         }
2665                         if ($filter ne '') {
2666                                 # looking for forks;
2667                                 my $pfx = substr($path, 0, length($filter));
2668                                 if ($pfx ne $filter) {
2669                                         next PROJECT;
2670                                 }
2671                                 my $sfx = substr($path, length($filter));
2672                                 if ($sfx !~ /^\/.*\.git$/) {
2673                                         next PROJECT;
2674                                 }
2675                         } elsif ($check_forks) {
2676                         PATH:
2677                                 foreach my $filter (keys %paths) {
2678                                         # looking for forks;
2679                                         my $pfx = substr($path, 0, length($filter));
2680                                         if ($pfx ne $filter) {
2681                                                 next PATH;
2682                                         }
2683                                         my $sfx = substr($path, length($filter));
2684                                         if ($sfx !~ /^\/.*\.git$/) {
2685                                                 next PATH;
2686                                         }
2687                                         # is a fork, don't include it in
2688                                         # the list
2689                                         next PROJECT;
2690                                 }
2691                         }
2692                         if (check_export_ok("$projectroot/$path")) {
2693                                 my $pr = {
2694                                         path => $path,
2695                                         owner => to_utf8($owner),
2696                                 };
2697                                 push @list, $pr;
2698                                 (my $forks_path = $path) =~ s/\.git$//;
2699                                 $paths{$forks_path}++;
2700                         }
2701                 }
2702                 close $fd;
2703         }
2704         return @list;
2705 }
2706
2707 our $gitweb_project_owner = undef;
2708 sub git_get_project_list_from_file {
2709
2710         return if (defined $gitweb_project_owner);
2711
2712         $gitweb_project_owner = {};
2713         # read from file (url-encoded):
2714         # 'git%2Fgit.git Linus+Torvalds'
2715         # 'libs%2Fklibc%2Fklibc.git H.+Peter+Anvin'
2716         # 'linux%2Fhotplug%2Fudev.git Greg+Kroah-Hartman'
2717         if (-f $projects_list) {
2718                 open(my $fd, '<', $projects_list);
2719                 while (my $line = <$fd>) {
2720                         chomp $line;
2721                         my ($pr, $ow) = split ' ', $line;
2722                         $pr = unescape($pr);
2723                         $ow = unescape($ow);
2724                         $gitweb_project_owner->{$pr} = to_utf8($ow);
2725                 }
2726                 close $fd;
2727         }
2728 }
2729
2730 sub git_get_project_owner {
2731         my $project = shift;
2732         my $owner;
2733
2734         return undef unless $project;
2735         $git_dir = "$projectroot/$project";
2736
2737         if (!defined $gitweb_project_owner) {
2738                 git_get_project_list_from_file();
2739         }
2740
2741         if (exists $gitweb_project_owner->{$project}) {
2742                 $owner = $gitweb_project_owner->{$project};
2743         }
2744         if (!defined $owner){
2745                 $owner = git_get_project_config('owner');
2746         }
2747         if (!defined $owner) {
2748                 $owner = get_file_owner("$git_dir");
2749         }
2750
2751         return $owner;
2752 }
2753
2754 sub git_get_last_activity {
2755         my ($path) = @_;
2756         my $fd;
2757
2758         $git_dir = "$projectroot/$path";
2759         open($fd, "-|", git_cmd(), 'for-each-ref',
2760              '--format=%(committer)',
2761              '--sort=-committerdate',
2762              '--count=1',
2763              'refs/heads') or return;
2764         my $most_recent = <$fd>;
2765         close $fd or return;
2766         if (defined $most_recent &&
2767             $most_recent =~ / (\d+) [-+][01]\d\d\d$/) {
2768                 my $timestamp = $1;
2769                 my $age = time - $timestamp;
2770                 return ($age, age_string($age));
2771         }
2772         return (undef, undef);
2773 }
2774
2775 sub git_get_references {
2776         my $type = shift || "";
2777         my %refs;
2778         # 5dc01c595e6c6ec9ccda4f6f69c131c0dd945f8c refs/tags/v2.6.11
2779         # c39ae07f393806ccf406ef966e9a15afc43cc36a refs/tags/v2.6.11^{}
2780         open my $fd, "-|", git_cmd(), "show-ref", "--dereference",
2781                 ($type ? ("--", "refs/$type") : ()) # use -- <pattern> if $type
2782                 or return;
2783
2784         while (my $line = <$fd>) {
2785                 chomp $line;
2786                 if ($line =~ m!^([0-9a-fA-F]{40})\srefs/($type.*)$!) {
2787                         if (defined $refs{$1}) {
2788                                 push @{$refs{$1}}, $2;
2789                         } else {
2790                                 $refs{$1} = [ $2 ];
2791                         }
2792                 }
2793         }
2794         close $fd or return;
2795         return \%refs;
2796 }
2797
2798 sub git_get_rev_name_tags {
2799         my $hash = shift || return undef;
2800
2801         open my $fd, "-|", git_cmd(), "name-rev", "--tags", $hash
2802                 or return;
2803         my $name_rev = <$fd>;
2804         close $fd;
2805
2806         if ($name_rev =~ m|^$hash tags/(.*)$|) {
2807                 return $1;
2808         } else {
2809                 # catches also '$hash undefined' output
2810                 return undef;
2811         }
2812 }
2813
2814 ## ----------------------------------------------------------------------
2815 ## parse to hash functions
2816
2817 sub parse_date {
2818         my $epoch = shift;
2819         my $tz = shift || "-0000";
2820
2821         my %date;
2822         my @months = ("Jan", "Feb", "Mar", "Apr", "May", "Jun", "Jul", "Aug", "Sep", "Oct", "Nov", "Dec");
2823         my @days = ("Sun", "Mon", "Tue", "Wed", "Thu", "Fri", "Sat");
2824         my ($sec, $min, $hour, $mday, $mon, $year, $wday, $yday) = gmtime($epoch);
2825         $date{'hour'} = $hour;
2826         $date{'minute'} = $min;
2827         $date{'mday'} = $mday;
2828         $date{'day'} = $days[$wday];
2829         $date{'month'} = $months[$mon];
2830         $date{'rfc2822'}   = sprintf "%s, %d %s %4d %02d:%02d:%02d +0000",
2831                              $days[$wday], $mday, $months[$mon], 1900+$year, $hour ,$min, $sec;
2832         $date{'mday-time'} = sprintf "%d %s %02d:%02d",
2833                              $mday, $months[$mon], $hour ,$min;
2834         $date{'iso-8601'}  = sprintf "%04d-%02d-%02dT%02d:%02d:%02dZ",
2835                              1900+$year, 1+$mon, $mday, $hour ,$min, $sec;
2836
2837         $tz =~ m/^([+\-][0-9][0-9])([0-9][0-9])$/;
2838         my $local = $epoch + ((int $1 + ($2/60)) * 3600);
2839         ($sec, $min, $hour, $mday, $mon, $year, $wday, $yday) = gmtime($local);
2840         $date{'hour_local'} = $hour;
2841         $date{'minute_local'} = $min;
2842         $date{'tz_local'} = $tz;
2843         $date{'iso-tz'} = sprintf("%04d-%02d-%02d %02d:%02d:%02d %s",
2844                                   1900+$year, $mon+1, $mday,
2845                                   $hour, $min, $sec, $tz);
2846         return %date;
2847 }
2848
2849 sub parse_tag {
2850         my $tag_id = shift;
2851         my %tag;
2852         my @comment;
2853
2854         open my $fd, "-|", git_cmd(), "cat-file", "tag", $tag_id or return;
2855         $tag{'id'} = $tag_id;
2856         while (my $line = <$fd>) {
2857                 chomp $line;
2858                 if ($line =~ m/^object ([0-9a-fA-F]{40})$/) {
2859                         $tag{'object'} = $1;
2860                 } elsif ($line =~ m/^type (.+)$/) {
2861                         $tag{'type'} = $1;
2862                 } elsif ($line =~ m/^tag (.+)$/) {
2863                         $tag{'name'} = $1;
2864                 } elsif ($line =~ m/^tagger (.*) ([0-9]+) (.*)$/) {
2865                         $tag{'author'} = $1;
2866                         $tag{'author_epoch'} = $2;
2867                         $tag{'author_tz'} = $3;
2868                         if ($tag{'author'} =~ m/^([^<]+) <([^>]*)>/) {
2869                                 $tag{'author_name'}  = $1;
2870                                 $tag{'author_email'} = $2;
2871                         } else {
2872                                 $tag{'author_name'} = $tag{'author'};
2873                         }
2874                 } elsif ($line =~ m/--BEGIN/) {
2875                         push @comment, $line;
2876                         last;
2877                 } elsif ($line eq "") {
2878                         last;
2879                 }
2880         }
2881         push @comment, <$fd>;
2882         $tag{'comment'} = \@comment;
2883         close $fd or return;
2884         if (!defined $tag{'name'}) {
2885                 return
2886         };
2887         return %tag
2888 }
2889
2890 sub parse_commit_text {
2891         my ($commit_text, $withparents) = @_;
2892         my @commit_lines = split '\n', $commit_text;
2893         my %co;
2894
2895         pop @commit_lines; # Remove '\0'
2896
2897         if (! @commit_lines) {
2898                 return;
2899         }
2900
2901         my $header = shift @commit_lines;
2902         if ($header !~ m/^[0-9a-fA-F]{40}/) {
2903                 return;
2904         }
2905         ($co{'id'}, my @parents) = split ' ', $header;
2906         while (my $line = shift @commit_lines) {
2907                 last if $line eq "\n";
2908                 if ($line =~ m/^tree ([0-9a-fA-F]{40})$/) {
2909                         $co{'tree'} = $1;
2910                 } elsif ((!defined $withparents) && ($line =~ m/^parent ([0-9a-fA-F]{40})$/)) {
2911                         push @parents, $1;
2912                 } elsif ($line =~ m/^author (.*) ([0-9]+) (.*)$/) {
2913                         $co{'author'} = to_utf8($1);
2914                         $co{'author_epoch'} = $2;
2915                         $co{'author_tz'} = $3;
2916                         if ($co{'author'} =~ m/^([^<]+) <([^>]*)>/) {
2917                                 $co{'author_name'}  = $1;
2918                                 $co{'author_email'} = $2;
2919                         } else {
2920                                 $co{'author_name'} = $co{'author'};
2921                         }
2922                 } elsif ($line =~ m/^committer (.*) ([0-9]+) (.*)$/) {
2923                         $co{'committer'} = to_utf8($1);
2924                         $co{'committer_epoch'} = $2;
2925                         $co{'committer_tz'} = $3;
2926                         if ($co{'committer'} =~ m/^([^<]+) <([^>]*)>/) {
2927                                 $co{'committer_name'}  = $1;
2928                                 $co{'committer_email'} = $2;
2929                         } else {
2930                                 $co{'committer_name'} = $co{'committer'};
2931                         }
2932                 }
2933         }
2934         if (!defined $co{'tree'}) {
2935                 return;
2936         };
2937         $co{'parents'} = \@parents;
2938         $co{'parent'} = $parents[0];
2939
2940         foreach my $title (@commit_lines) {
2941                 $title =~ s/^    //;
2942                 if ($title ne "") {
2943                         $co{'title'} = chop_str($title, 80, 5);
2944                         # remove leading stuff of merges to make the interesting part visible
2945                         if (length($title) > 50) {
2946                                 $title =~ s/^Automatic //;
2947                                 $title =~ s/^merge (of|with) /Merge ... /i;
2948                                 if (length($title) > 50) {
2949                                         $title =~ s/(http|rsync):\/\///;
2950                                 }
2951                                 if (length($title) > 50) {
2952                                         $title =~ s/(master|www|rsync)\.//;
2953                                 }
2954                                 if (length($title) > 50) {
2955                                         $title =~ s/kernel.org:?//;
2956                                 }
2957                                 if (length($title) > 50) {
2958                                         $title =~ s/\/pub\/scm//;
2959                                 }
2960                         }
2961                         $co{'title_short'} = chop_str($title, 50, 5);
2962                         last;
2963                 }
2964         }
2965         if (! defined $co{'title'} || $co{'title'} eq "") {
2966                 $co{'title'} = $co{'title_short'} = '(no commit message)';
2967         }
2968         # remove added spaces
2969         foreach my $line (@commit_lines) {
2970                 $line =~ s/^    //;
2971         }
2972         $co{'comment'} = \@commit_lines;
2973
2974         my $age = time - $co{'committer_epoch'};
2975         $co{'age'} = $age;
2976         $co{'age_string'} = age_string($age);
2977         my ($sec, $min, $hour, $mday, $mon, $year, $wday, $yday) = gmtime($co{'committer_epoch'});
2978         if ($age > 60*60*24*7*2) {
2979                 $co{'age_string_date'} = sprintf "%4i-%02u-%02i", 1900 + $year, $mon+1, $mday;
2980                 $co{'age_string_age'} = $co{'age_string'};
2981         } else {
2982                 $co{'age_string_date'} = $co{'age_string'};
2983                 $co{'age_string_age'} = sprintf "%4i-%02u-%02i", 1900 + $year, $mon+1, $mday;
2984         }
2985         return %co;
2986 }
2987
2988 sub parse_commit {
2989         my ($commit_id) = @_;
2990         my %co;
2991
2992         local $/ = "\0";
2993
2994         open my $fd, "-|", git_cmd(), "rev-list",
2995                 "--parents",
2996                 "--header",
2997                 "--max-count=1",
2998                 $commit_id,
2999                 "--",
3000                 or die_error(500, "Open git-rev-list failed");
3001         %co = parse_commit_text(<$fd>, 1);
3002         close $fd;
3003
3004         return %co;
3005 }
3006
3007 sub parse_commits {
3008         my ($commit_id, $maxcount, $skip, $filename, @args) = @_;
3009         my @cos;
3010
3011         $maxcount ||= 1;
3012         $skip ||= 0;
3013
3014         local $/ = "\0";
3015
3016         open my $fd, "-|", git_cmd(), "rev-list",
3017                 "--header",
3018                 @args,
3019                 ("--max-count=" . $maxcount),
3020                 ("--skip=" . $skip),
3021                 @extra_options,
3022                 $commit_id,
3023                 "--",
3024                 ($filename ? ($filename) : ())
3025                 or die_error(500, "Open git-rev-list failed");
3026         while (my $line = <$fd>) {
3027                 my %co = parse_commit_text($line);
3028                 push @cos, \%co;
3029         }
3030         close $fd;
3031
3032         return wantarray ? @cos : \@cos;
3033 }
3034
3035 # parse line of git-diff-tree "raw" output
3036 sub parse_difftree_raw_line {
3037         my $line = shift;
3038         my %res;
3039
3040         # ':100644 100644 03b218260e99b78c6df0ed378e59ed9205ccc96d 3b93d5e7cc7f7dd4ebed13a5cc1a4ad976fc94d8 M   ls-files.c'
3041         # ':100644 100644 7f9281985086971d3877aca27704f2aaf9c448ce bc190ebc71bbd923f2b728e505408f5e54bd073a M   rev-tree.c'
3042         if ($line =~ m/^:([0-7]{6}) ([0-7]{6}) ([0-9a-fA-F]{40}) ([0-9a-fA-F]{40}) (.)([0-9]{0,3})\t(.*)$/) {
3043                 $res{'from_mode'} = $1;
3044                 $res{'to_mode'} = $2;
3045                 $res{'from_id'} = $3;
3046                 $res{'to_id'} = $4;
3047                 $res{'status'} = $5;
3048                 $res{'similarity'} = $6;
3049                 if ($res{'status'} eq 'R' || $res{'status'} eq 'C') { # renamed or copied
3050                         ($res{'from_file'}, $res{'to_file'}) = map { unquote($_) } split("\t", $7);
3051                 } else {
3052                         $res{'from_file'} = $res{'to_file'} = $res{'file'} = unquote($7);
3053                 }
3054         }
3055         # '::100755 100755 100755 60e79ca1b01bc8b057abe17ddab484699a7f5fdb 94067cc5f73388f33722d52ae02f44692bc07490 94067cc5f73388f33722d52ae02f44692bc07490 MR git-gui/git-gui.sh'
3056         # combined diff (for merge commit)
3057         elsif ($line =~ s/^(::+)((?:[0-7]{6} )+)((?:[0-9a-fA-F]{40} )+)([a-zA-Z]+)\t(.*)$//) {
3058                 $res{'nparents'}  = length($1);
3059                 $res{'from_mode'} = [ split(' ', $2) ];
3060                 $res{'to_mode'} = pop @{$res{'from_mode'}};
3061                 $res{'from_id'} = [ split(' ', $3) ];
3062                 $res{'to_id'} = pop @{$res{'from_id'}};
3063                 $res{'status'} = [ split('', $4) ];
3064                 $res{'to_file'} = unquote($5);
3065         }
3066         # 'c512b523472485aef4fff9e57b229d9d243c967f'
3067         elsif ($line =~ m/^([0-9a-fA-F]{40})$/) {
3068                 $res{'commit'} = $1;
3069         }
3070
3071         return wantarray ? %res : \%res;
3072 }
3073
3074 # wrapper: return parsed line of git-diff-tree "raw" output
3075 # (the argument might be raw line, or parsed info)
3076 sub parsed_difftree_line {
3077         my $line_or_ref = shift;
3078
3079         if (ref($line_or_ref) eq "HASH") {
3080                 # pre-parsed (or generated by hand)
3081                 return $line_or_ref;
3082         } else {
3083                 return parse_difftree_raw_line($line_or_ref);
3084         }
3085 }
3086
3087 # parse line of git-ls-tree output
3088 sub parse_ls_tree_line {
3089         my $line = shift;
3090         my %opts = @_;
3091         my %res;
3092
3093         if ($opts{'-l'}) {
3094                 #'100644 blob 0fa3f3a66fb6a137f6ec2c19351ed4d807070ffa   16717  panic.c'
3095                 $line =~ m/^([0-9]+) (.+) ([0-9a-fA-F]{40}) +(-|[0-9]+)\t(.+)$/s;
3096
3097                 $res{'mode'} = $1;
3098                 $res{'type'} = $2;
3099                 $res{'hash'} = $3;
3100                 $res{'size'} = $4;
3101                 if ($opts{'-z'}) {
3102                         $res{'name'} = $5;
3103                 } else {
3104                         $res{'name'} = unquote($5);
3105                 }
3106         } else {
3107                 #'100644 blob 0fa3f3a66fb6a137f6ec2c19351ed4d807070ffa  panic.c'
3108                 $line =~ m/^([0-9]+) (.+) ([0-9a-fA-F]{40})\t(.+)$/s;
3109
3110                 $res{'mode'} = $1;
3111                 $res{'type'} = $2;
3112                 $res{'hash'} = $3;
3113                 if ($opts{'-z'}) {
3114                         $res{'name'} = $4;
3115                 } else {
3116                         $res{'name'} = unquote($4);
3117                 }
3118         }
3119
3120         return wantarray ? %res : \%res;
3121 }
3122
3123 # generates _two_ hashes, references to which are passed as 2 and 3 argument
3124 sub parse_from_to_diffinfo {
3125         my ($diffinfo, $from, $to, @parents) = @_;
3126
3127         if ($diffinfo->{'nparents'}) {
3128                 # combined diff
3129                 $from->{'file'} = [];
3130                 $from->{'href'} = [];
3131                 fill_from_file_info($diffinfo, @parents)
3132                         unless exists $diffinfo->{'from_file'};
3133                 for (my $i = 0; $i < $diffinfo->{'nparents'}; $i++) {
3134                         $from->{'file'}[$i] =
3135                                 defined $diffinfo->{'from_file'}[$i] ?
3136                                         $diffinfo->{'from_file'}[$i] :
3137                                         $diffinfo->{'to_file'};
3138                         if ($diffinfo->{'status'}[$i] ne "A") { # not new (added) file
3139                                 $from->{'href'}[$i] = href(action=>"blob",
3140                                                            hash_base=>$parents[$i],
3141                                                            hash=>$diffinfo->{'from_id'}[$i],
3142                                                            file_name=>$from->{'file'}[$i]);
3143                         } else {
3144                                 $from->{'href'}[$i] = undef;
3145                         }
3146                 }
3147         } else {
3148                 # ordinary (not combined) diff
3149                 $from->{'file'} = $diffinfo->{'from_file'};
3150                 if ($diffinfo->{'status'} ne "A") { # not new (added) file
3151                         $from->{'href'} = href(action=>"blob", hash_base=>$hash_parent,
3152                                                hash=>$diffinfo->{'from_id'},
3153                                                file_name=>$from->{'file'});
3154                 } else {
3155                         delete $from->{'href'};
3156                 }
3157         }
3158
3159         $to->{'file'} = $diffinfo->{'to_file'};
3160         if (!is_deleted($diffinfo)) { # file exists in result
3161                 $to->{'href'} = href(action=>"blob", hash_base=>$hash,
3162                                      hash=>$diffinfo->{'to_id'},
3163                                      file_name=>$to->{'file'});
3164         } else {
3165                 delete $to->{'href'};
3166         }
3167 }
3168
3169 ## ......................................................................
3170 ## parse to array of hashes functions
3171
3172 sub git_get_heads_list {
3173         my ($limit, @classes) = @_;
3174         @classes = ('heads') unless @classes;
3175         my @patterns = map { "refs/$_" } @classes;
3176         my @headslist;
3177
3178         open my $fd, '-|', git_cmd(), 'for-each-ref',
3179                 ($limit ? '--count='.($limit+1) : ()), '--sort=-committerdate',
3180                 '--format=%(objectname) %(refname) %(subject)%00%(committer)',
3181                 @patterns
3182                 or return;
3183         while (my $line = <$fd>) {
3184                 my %ref_item;
3185
3186                 chomp $line;
3187                 my ($refinfo, $committerinfo) = split(/\0/, $line);
3188                 my ($hash, $name, $title) = split(' ', $refinfo, 3);
3189                 my ($committer, $epoch, $tz) =
3190                         ($committerinfo =~ /^(.*) ([0-9]+) (.*)$/);
3191                 $ref_item{'fullname'}  = $name;
3192                 $name =~ s!^refs/(?:head|remote)s/!!;
3193
3194                 $ref_item{'name'}  = $name;
3195                 $ref_item{'id'}    = $hash;
3196                 $ref_item{'title'} = $title || '(no commit message)';
3197                 $ref_item{'epoch'} = $epoch;
3198                 if ($epoch) {
3199                         $ref_item{'age'} = age_string(time - $ref_item{'epoch'});
3200                 } else {
3201                         $ref_item{'age'} = "unknown";
3202                 }
3203
3204                 push @headslist, \%ref_item;
3205         }
3206         close $fd;
3207
3208         return wantarray ? @headslist : \@headslist;
3209 }
3210
3211 sub git_get_tags_list {
3212         my $limit = shift;
3213         my @tagslist;
3214
3215         open my $fd, '-|', git_cmd(), 'for-each-ref',
3216                 ($limit ? '--count='.($limit+1) : ()), '--sort=-creatordate',
3217                 '--format=%(objectname) %(objecttype) %(refname) '.
3218                 '%(*objectname) %(*objecttype) %(subject)%00%(creator)',
3219                 'refs/tags'
3220                 or return;
3221         while (my $line = <$fd>) {
3222                 my %ref_item;
3223
3224                 chomp $line;
3225                 my ($refinfo, $creatorinfo) = split(/\0/, $line);
3226                 my ($id, $type, $name, $refid, $reftype, $title) = split(' ', $refinfo, 6);
3227                 my ($creator, $epoch, $tz) =
3228                         ($creatorinfo =~ /^(.*) ([0-9]+) (.*)$/);
3229                 $ref_item{'fullname'} = $name;
3230                 $name =~ s!^refs/tags/!!;
3231
3232                 $ref_item{'type'} = $type;
3233                 $ref_item{'id'} = $id;
3234                 $ref_item{'name'} = $name;
3235                 if ($type eq "tag") {
3236                         $ref_item{'subject'} = $title;
3237                         $ref_item{'reftype'} = $reftype;
3238                         $ref_item{'refid'}   = $refid;
3239                 } else {
3240                         $ref_item{'reftype'} = $type;
3241                         $ref_item{'refid'}   = $id;
3242                 }
3243
3244                 if ($type eq "tag" || $type eq "commit") {
3245                         $ref_item{'epoch'} = $epoch;
3246                         if ($epoch) {
3247                                 $ref_item{'age'} = age_string(time - $ref_item{'epoch'});
3248                         } else {
3249                                 $ref_item{'age'} = "unknown";
3250                         }
3251                 }
3252
3253                 push @tagslist, \%ref_item;
3254         }
3255         close $fd;
3256
3257         return wantarray ? @tagslist : \@tagslist;
3258 }
3259
3260 ## ----------------------------------------------------------------------
3261 ## filesystem-related functions
3262
3263 sub get_file_owner {
3264         my $path = shift;
3265
3266         my ($dev, $ino, $mode, $nlink, $st_uid, $st_gid, $rdev, $size) = stat($path);
3267         my ($name, $passwd, $uid, $gid, $quota, $comment, $gcos, $dir, $shell) = getpwuid($st_uid);
3268         if (!defined $gcos) {
3269                 return undef;
3270         }
3271         my $owner = $gcos;
3272         $owner =~ s/[,;].*$//;
3273         return to_utf8($owner);
3274 }
3275
3276 # assume that file exists
3277 sub insert_file {
3278         my $filename = shift;
3279
3280         open my $fd, '<', $filename;
3281         print map { to_utf8($_) } <$fd>;
3282         close $fd;
3283 }
3284
3285 ## ......................................................................
3286 ## mimetype related functions
3287
3288 sub mimetype_guess_file {
3289         my $filename = shift;
3290         my $mimemap = shift;
3291         -r $mimemap or return undef;
3292
3293         my %mimemap;
3294         open(my $mh, '<', $mimemap) or return undef;
3295         while (<$mh>) {
3296                 next if m/^#/; # skip comments
3297                 my ($mimetype, $exts) = split(/\t+/);
3298                 if (defined $exts) {
3299                         my @exts = split(/\s+/, $exts);
3300                         foreach my $ext (@exts) {
3301                                 $mimemap{$ext} = $mimetype;
3302                         }
3303                 }
3304         }
3305         close($mh);
3306
3307         $filename =~ /\.([^.]*)$/;
3308         return $mimemap{$1};
3309 }
3310
3311 sub mimetype_guess {
3312         my $filename = shift;
3313         my $mime;
3314         $filename =~ /\./ or return undef;
3315
3316         if ($mimetypes_file) {
3317                 my $file = $mimetypes_file;
3318                 if ($file !~ m!^/!) { # if it is relative path
3319                         # it is relative to project
3320                         $file = "$projectroot/$project/$file";
3321                 }
3322                 $mime = mimetype_guess_file($filename, $file);
3323         }
3324         $mime ||= mimetype_guess_file($filename, '/etc/mime.types');
3325         return $mime;
3326 }
3327
3328 sub blob_mimetype {
3329         my $fd = shift;
3330         my $filename = shift;
3331
3332         if ($filename) {
3333                 my $mime = mimetype_guess($filename);
3334                 $mime and return $mime;
3335         }
3336
3337         # just in case
3338         return $default_blob_plain_mimetype unless $fd;
3339
3340         if (-T $fd) {
3341                 return 'text/plain';
3342         } elsif (! $filename) {
3343                 return 'application/octet-stream';
3344         } elsif ($filename =~ m/\.png$/i) {
3345                 return 'image/png';
3346         } elsif ($filename =~ m/\.gif$/i) {
3347                 return 'image/gif';
3348         } elsif ($filename =~ m/\.jpe?g$/i) {
3349                 return 'image/jpeg';
3350         } else {
3351                 return 'application/octet-stream';
3352         }
3353 }
3354
3355 sub blob_contenttype {
3356         my ($fd, $file_name, $type) = @_;
3357
3358         $type ||= blob_mimetype($fd, $file_name);
3359         if ($type eq 'text/plain' && defined $default_text_plain_charset) {
3360                 $type .= "; charset=$default_text_plain_charset";
3361         }
3362
3363         return $type;
3364 }
3365
3366 # guess file syntax for syntax highlighting; return undef if no highlighting
3367 # the name of syntax can (in the future) depend on syntax highlighter used
3368 sub guess_file_syntax {
3369         my ($highlight, $mimetype, $file_name) = @_;
3370         return undef unless ($highlight && defined $file_name);
3371         my $basename = basename($file_name, '.in');
3372         return $highlight_basename{$basename}
3373                 if exists $highlight_basename{$basename};
3374
3375         $basename =~ /\.([^.]*)$/;
3376         my $ext = $1 or return undef;
3377         return $highlight_ext{$ext}
3378                 if exists $highlight_ext{$ext};
3379
3380         return undef;
3381 }
3382
3383 # run highlighter and return FD of its output,
3384 # or return original FD if no highlighting
3385 sub run_highlighter {
3386         my ($fd, $highlight, $syntax) = @_;
3387         return $fd unless ($highlight && defined $syntax);
3388
3389         close $fd
3390                 or die_error(404, "Reading blob failed");
3391         open $fd, quote_command(git_cmd(), "cat-file", "blob", $hash)." | ".
3392                   quote_command($highlight_bin).
3393                   " --xhtml --fragment --syntax $syntax |"
3394                 or die_error(500, "Couldn't open file or run syntax highlighter");
3395         return $fd;
3396 }
3397
3398 ## ======================================================================
3399 ## functions printing HTML: header, footer, error page
3400
3401 sub get_page_title {
3402         my $title = to_utf8($site_name);
3403
3404         return $title unless (defined $project);
3405         $title .= " - " . to_utf8($project);
3406
3407         return $title unless (defined $action);
3408         $title .= "/$action"; # $action is US-ASCII (7bit ASCII)
3409
3410         return $title unless (defined $file_name);
3411         $title .= " - " . esc_path($file_name);
3412         if ($action eq "tree" && $file_name !~ m|/$|) {
3413                 $title .= "/";
3414         }
3415
3416         return $title;
3417 }
3418
3419 sub git_header_html {
3420         my $status = shift || "200 OK";
3421         my $expires = shift;
3422         my %opts = @_;
3423
3424         my $title = get_page_title();
3425         my $content_type;
3426         # require explicit support from the UA if we are to send the page as
3427         # 'application/xhtml+xml', otherwise send it as plain old 'text/html'.
3428         # we have to do this because MSIE sometimes globs '*/*', pretending to
3429         # support xhtml+xml but choking when it gets what it asked for.
3430         if (defined $cgi->http('HTTP_ACCEPT') &&
3431             $cgi->http('HTTP_ACCEPT') =~ m/(,|;|\s|^)application\/xhtml\+xml(,|;|\s|$)/ &&
3432             $cgi->Accept('application/xhtml+xml') != 0) {
3433                 $content_type = 'application/xhtml+xml';
3434         } else {
3435                 $content_type = 'text/html';
3436         }
3437         print $cgi->header(-type=>$content_type, -charset => 'utf-8',
3438                            -status=> $status, -expires => $expires)
3439                 unless ($opts{'-no_http_header'});
3440         my $mod_perl_version = $ENV{'MOD_PERL'} ? " $ENV{'MOD_PERL'}" : '';
3441         print <<EOF;
3442 <?xml version="1.0" encoding="utf-8"?>
3443 <!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Strict//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-strict.dtd">
3444 <html xmlns="http://www.w3.org/1999/xhtml" xml:lang="en-US" lang="en-US">
3445 <!-- git web interface version $version, (C) 2005-2006, Kay Sievers <kay.sievers\@vrfy.org>, Christian Gierke -->
3446 <!-- git core binaries version $git_version -->
3447 <head>
3448 <meta http-equiv="content-type" content="$content_type; charset=utf-8"/>
3449 <meta name="generator" content="gitweb/$version git/$git_version$mod_perl_version"/>
3450 <meta name="robots" content="index, nofollow"/>
3451 <title>$title</title>
3452 EOF
3453         # the stylesheet, favicon etc urls won't work correctly with path_info
3454         # unless we set the appropriate base URL
3455         if ($ENV{'PATH_INFO'}) {
3456                 print "<base href=\"".esc_url($base_url)."\" />\n";
3457         }
3458         # print out each stylesheet that exist, providing backwards capability
3459         # for those people who defined $stylesheet in a config file
3460         if (defined $stylesheet) {
3461                 print '<link rel="stylesheet" type="text/css" href="'.$stylesheet.'"/>'."\n";
3462         } else {
3463                 foreach my $stylesheet (@stylesheets) {
3464                         next unless $stylesheet;
3465                         print '<link rel="stylesheet" type="text/css" href="'.$stylesheet.'"/>'."\n";
3466                 }
3467         }
3468         if (defined $project) {
3469                 my %href_params = get_feed_info();
3470                 if (!exists $href_params{'-title'}) {
3471                         $href_params{'-title'} = 'log';
3472                 }
3473
3474                 foreach my $format qw(RSS Atom) {
3475                         my $type = lc($format);
3476                         my %link_attr = (
3477                                 '-rel' => 'alternate',
3478                                 '-title' => "$project - $href_params{'-title'} - $format feed",
3479                                 '-type' => "application/$type+xml"
3480                         );
3481
3482                         $href_params{'action'} = $type;
3483                         $link_attr{'-href'} = href(%href_params);
3484                         print "<link ".
3485                               "rel=\"$link_attr{'-rel'}\" ".
3486                               "title=\"$link_attr{'-title'}\" ".
3487                               "href=\"$link_attr{'-href'}\" ".
3488                               "type=\"$link_attr{'-type'}\" ".
3489                               "/>\n";
3490
3491                         $href_params{'extra_options'} = '--no-merges';
3492                         $link_attr{'-href'} = href(%href_params);
3493                         $link_attr{'-title'} .= ' (no merges)';
3494                         print "<link ".
3495                               "rel=\"$link_attr{'-rel'}\" ".
3496                               "title=\"$link_attr{'-title'}\" ".
3497                               "href=\"$link_attr{'-href'}\" ".
3498                               "type=\"$link_attr{'-type'}\" ".
3499                               "/>\n";
3500                 }
3501
3502         } else {
3503                 printf('<link rel="alternate" title="%s projects list" '.
3504                        'href="%s" type="text/plain; charset=utf-8" />'."\n",
3505                        $site_name, href(project=>undef, action=>"project_index"));
3506                 printf('<link rel="alternate" title="%s projects feeds" '.
3507                        'href="%s" type="text/x-opml" />'."\n",
3508                        $site_name, href(project=>undef, action=>"opml"));
3509         }
3510         if (defined $favicon) {
3511                 print qq(<link rel="shortcut icon" href="$favicon" type="image/png" />\n);
3512         }
3513
3514         print "</head>\n" .
3515               "<body>\n";
3516
3517         if (defined $site_header && -f $site_header) {
3518                 insert_file($site_header);
3519         }
3520
3521         print "<div class=\"page_header\">\n" .
3522               $cgi->a({-href => esc_url($logo_url),
3523                        -title => $logo_label},
3524                       qq(<img src="$logo" width="72" height="27" alt="git" class="logo"/>));
3525         print $cgi->a({-href => esc_url($home_link)}, $home_link_str) . " / ";
3526         if (defined $project) {
3527                 print $cgi->a({-href => href(action=>"summary")}, esc_html($project));
3528                 if (defined $action) {
3529                         my $action_print = $action ;
3530                         if (defined $opts{-action_extra}) {
3531                                 $action_print = $cgi->a({-href => href(action=>$action)},
3532                                         $action);
3533                         }
3534                         print " / $action_print";
3535                 }
3536                 if (defined $opts{-action_extra}) {
3537                         print " / $opts{-action_extra}";
3538                 }
3539                 print "\n";
3540         }
3541         print "</div>\n";
3542
3543         my $have_search = gitweb_check_feature('search');
3544         if (defined $project && $have_search) {
3545                 if (!defined $searchtext) {
3546                         $searchtext = "";
3547                 }
3548                 my $search_hash;
3549                 if (defined $hash_base) {
3550                         $search_hash = $hash_base;
3551                 } elsif (defined $hash) {
3552                         $search_hash = $hash;
3553                 } else {
3554                         $search_hash = "HEAD";
3555                 }
3556                 my $action = $my_uri;
3557                 my $use_pathinfo = gitweb_check_feature('pathinfo');
3558                 if ($use_pathinfo) {
3559                         $action .= "/".esc_url($project);
3560                 }
3561                 print $cgi->startform(-method => "get", -action => $action) .
3562                       "<div class=\"search\">\n" .
3563                       (!$use_pathinfo &&
3564                       $cgi->input({-name=>"p", -value=>$project, -type=>"hidden"}) . "\n") .
3565                       $cgi->input({-name=>"a", -value=>"search", -type=>"hidden"}) . "\n" .
3566                       $cgi->input({-name=>"h", -value=>$search_hash, -type=>"hidden"}) . "\n" .
3567                       $cgi->popup_menu(-name => 'st', -default => 'commit',
3568                                        -values => ['commit', 'grep', 'author', 'committer', 'pickaxe']) .
3569                       $cgi->sup($cgi->a({-href => href(action=>"search_help")}, "?")) .
3570                       " search:\n",
3571                       $cgi->textfield(-name => "s", -value => $searchtext) . "\n" .
3572                       "<span title=\"Extended regular expression\">" .
3573                       $cgi->checkbox(-name => 'sr', -value => 1, -label => 're',
3574                                      -checked => $search_use_regexp) .
3575                       "</span>" .
3576                       "</div>" .
3577                       $cgi->end_form() . "\n";
3578         }
3579 }
3580
3581 sub git_footer_html {
3582         my $feed_class = 'rss_logo';
3583
3584         print "<div class=\"page_footer\">\n";
3585         if (defined $project) {
3586                 my $descr = git_get_project_description($project);
3587                 if (defined $descr) {
3588                         print "<div class=\"page_footer_text\">" . esc_html($descr) . "</div>\n";
3589                 }
3590
3591                 my %href_params = get_feed_info();
3592                 if (!%href_params) {
3593                         $feed_class .= ' generic';
3594                 }
3595                 $href_params{'-title'} ||= 'log';
3596
3597                 foreach my $format qw(RSS Atom) {
3598                         $href_params{'action'} = lc($format);
3599                         print $cgi->a({-href => href(%href_params),
3600                                       -title => "$href_params{'-title'} $format feed",
3601                                       -class => $feed_class}, $format)."\n";
3602                 }
3603
3604         } else {
3605                 print $cgi->a({-href => href(project=>undef, action=>"opml"),
3606                               -class => $feed_class}, "OPML") . " ";
3607                 print $cgi->a({-href => href(project=>undef, action=>"project_index"),
3608                               -class => $feed_class}, "TXT") . "\n";
3609         }
3610         print "</div>\n"; # class="page_footer"
3611
3612         if (defined $t0 && gitweb_check_feature('timed')) {
3613                 print "<div id=\"generating_info\">\n";
3614                 print 'This page took '.
3615                       '<span id="generating_time" class="time_span">'.
3616                       Time::HiRes::tv_interval($t0, [Time::HiRes::gettimeofday()]).
3617                       ' seconds </span>'.
3618                       ' and '.
3619                       '<span id="generating_cmd">'.
3620                       $number_of_git_cmds.
3621                       '</span> git commands '.
3622                       " to generate.\n";
3623                 print "</div>\n"; # class="page_footer"
3624         }
3625
3626         if (defined $site_footer && -f $site_footer) {
3627                 insert_file($site_footer);
3628         }
3629
3630         print qq!<script type="text/javascript" src="$javascript"></script>\n!;
3631         if (defined $action &&
3632             $action eq 'blame_incremental') {
3633                 print qq!<script type="text/javascript">\n!.
3634                       qq!startBlame("!. href(action=>"blame_data", -replay=>1) .qq!",\n!.
3635                       qq!           "!. href() .qq!");\n!.
3636                       qq!</script>\n!;
3637         } elsif (gitweb_check_feature('javascript-actions')) {
3638                 print qq!<script type="text/javascript">\n!.
3639                       qq!window.onload = fixLinks;\n!.
3640                       qq!</script>\n!;
3641         }
3642
3643         print "</body>\n" .
3644               "</html>";
3645 }
3646
3647 # die_error(<http_status_code>, <error_message>[, <detailed_html_description>])
3648 # Example: die_error(404, 'Hash not found')
3649 # By convention, use the following status codes (as defined in RFC 2616):
3650 # 400: Invalid or missing CGI parameters, or
3651 #      requested object exists but has wrong type.
3652 # 403: Requested feature (like "pickaxe" or "snapshot") not enabled on
3653 #      this server or project.
3654 # 404: Requested object/revision/project doesn't exist.
3655 # 500: The server isn't configured properly, or
3656 #      an internal error occurred (e.g. failed assertions caused by bugs), or
3657 #      an unknown error occurred (e.g. the git binary died unexpectedly).
3658 # 503: The server is currently unavailable (because it is overloaded,
3659 #      or down for maintenance).  Generally, this is a temporary state.
3660 sub die_error {
3661         my $status = shift || 500;
3662         my $error = esc_html(shift) || "Internal Server Error";
3663         my $extra = shift;
3664         my %opts = @_;
3665
3666         my %http_responses = (
3667                 400 => '400 Bad Request',
3668                 403 => '403 Forbidden',
3669                 404 => '404 Not Found',
3670                 500 => '500 Internal Server Error',
3671                 503 => '503 Service Unavailable',
3672         );
3673         git_header_html($http_responses{$status}, undef, %opts);
3674         print <<EOF;
3675 <div class="page_body">
3676 <br /><br />
3677 $status - $error
3678 <br />
3679 EOF
3680         if (defined $extra) {
3681                 print "<hr />\n" .
3682                       "$extra\n";
3683         }
3684         print "</div>\n";
3685
3686         git_footer_html();
3687         goto DONE_GITWEB
3688                 unless ($opts{'-error_handler'});
3689 }
3690
3691 ## ----------------------------------------------------------------------
3692 ## functions printing or outputting HTML: navigation
3693
3694 sub git_print_page_nav {
3695         my ($current, $suppress, $head, $treehead, $treebase, $extra) = @_;
3696         $extra = '' if !defined $extra; # pager or formats
3697
3698         my @navs = qw(summary shortlog log commit commitdiff tree);
3699         if ($suppress) {
3700                 @navs = grep { $_ ne $suppress } @navs;
3701         }
3702
3703         my %arg = map { $_ => {action=>$_} } @navs;
3704         if (defined $head) {
3705                 for (qw(commit commitdiff)) {
3706                         $arg{$_}{'hash'} = $head;
3707                 }
3708                 if ($current =~ m/^(tree | log | shortlog | commit | commitdiff | search)$/x) {
3709                         for (qw(shortlog log)) {
3710                                 $arg{$_}{'hash'} = $head;
3711                         }
3712                 }
3713         }
3714
3715         $arg{'tree'}{'hash'} = $treehead if defined $treehead;
3716         $arg{'tree'}{'hash_base'} = $treebase if defined $treebase;
3717
3718         my @actions = gitweb_get_feature('actions');
3719         my %repl = (
3720                 '%' => '%',
3721                 'n' => $project,         # project name
3722                 'f' => $git_dir,         # project path within filesystem
3723                 'h' => $treehead || '',  # current hash ('h' parameter)
3724                 'b' => $treebase || '',  # hash base ('hb' parameter)
3725         );
3726         while (@actions) {
3727                 my ($label, $link, $pos) = splice(@actions,0,3);
3728                 # insert
3729                 @navs = map { $_ eq $pos ? ($_, $label) : $_ } @navs;
3730                 # munch munch
3731                 $link =~ s/%([%nfhb])/$repl{$1}/g;
3732                 $arg{$label}{'_href'} = $link;
3733         }
3734
3735         print "<div class=\"page_nav\">\n" .
3736                 (join " | ",
3737                  map { $_ eq $current ?
3738                        $_ : $cgi->a({-href => ($arg{$_}{_href} ? $arg{$_}{_href} : href(%{$arg{$_}}))}, "$_")
3739                  } @navs);
3740         print "<br/>\n$extra<br/>\n" .
3741               "</div>\n";
3742 }
3743
3744 # returns a submenu for the nagivation of the refs views (tags, heads,
3745 # remotes) with the current view disabled and the remotes view only
3746 # available if the feature is enabled
3747 sub format_ref_views {
3748         my ($current) = @_;
3749         my @ref_views = qw{tags heads};
3750         push @ref_views, 'remotes' if gitweb_check_feature('remote_heads');
3751         return join " | ", map {
3752                 $_ eq $current ? $_ :
3753                 $cgi->a({-href => href(action=>$_)}, $_)
3754         } @ref_views
3755 }
3756
3757 sub format_paging_nav {
3758         my ($action, $page, $has_next_link) = @_;
3759         my $paging_nav;
3760
3761
3762         if ($page > 0) {
3763                 $paging_nav .=
3764                         $cgi->a({-href => href(-replay=>1, page=>undef)}, "first") .
3765                         " &sdot; " .
3766                         $cgi->a({-href => href(-replay=>1, page=>$page-1),
3767                                  -accesskey => "p", -title => "Alt-p"}, "prev");
3768         } else {
3769                 $paging_nav .= "first &sdot; prev";
3770         }
3771
3772         if ($has_next_link) {
3773                 $paging_nav .= " &sdot; " .
3774                         $cgi->a({-href => href(-replay=>1, page=>$page+1),
3775                                  -accesskey => "n", -title => "Alt-n"}, "next");
3776         } else {
3777                 $paging_nav .= " &sdot; next";
3778         }
3779
3780         return $paging_nav;
3781 }
3782
3783 ## ......................................................................
3784 ## functions printing or outputting HTML: div
3785
3786 sub git_print_header_div {
3787         my ($action, $title, $hash, $hash_base) = @_;
3788         my %args = ();
3789
3790         $args{'action'} = $action;
3791         $args{'hash'} = $hash if $hash;
3792         $args{'hash_base'} = $hash_base if $hash_base;
3793
3794         print "<div class=\"header\">\n" .
3795               $cgi->a({-href => href(%args), -class => "title"},
3796               $title ? $title : $action) .
3797               "\n</div>\n";
3798 }
3799
3800 sub print_local_time {
3801         print format_local_time(@_);
3802 }
3803
3804 sub format_local_time {
3805         my $localtime = '';
3806         my %date = @_;
3807         if ($date{'hour_local'} < 6) {
3808                 $localtime .= sprintf(" (<span class=\"atnight\">%02d:%02d</span> %s)",
3809                         $date{'hour_local'}, $date{'minute_local'}, $date{'tz_local'});
3810         } else {
3811                 $localtime .= sprintf(" (%02d:%02d %s)",
3812                         $date{'hour_local'}, $date{'minute_local'}, $date{'tz_local'});
3813         }
3814
3815         return $localtime;
3816 }
3817
3818 # Outputs the author name and date in long form
3819 sub git_print_authorship {
3820         my $co = shift;
3821         my %opts = @_;
3822         my $tag = $opts{-tag} || 'div';
3823         my $author = $co->{'author_name'};
3824
3825         my %ad = parse_date($co->{'author_epoch'}, $co->{'author_tz'});
3826         print "<$tag class=\"author_date\">" .
3827               format_search_author($author, "author", esc_html($author)) .
3828               " [$ad{'rfc2822'}";
3829         print_local_time(%ad) if ($opts{-localtime});
3830         print "]" . git_get_avatar($co->{'author_email'}, -pad_before => 1)
3831                   . "</$tag>\n";
3832 }
3833
3834 # Outputs table rows containing the full author or committer information,
3835 # in the format expected for 'commit' view (& similar).
3836 # Parameters are a commit hash reference, followed by the list of people
3837 # to output information for. If the list is empty it defaults to both
3838 # author and committer.
3839 sub git_print_authorship_rows {
3840         my $co = shift;
3841         # too bad we can't use @people = @_ || ('author', 'committer')
3842         my @people = @_;
3843         @people = ('author', 'committer') unless @people;
3844         foreach my $who (@people) {
3845                 my %wd = parse_date($co->{"${who}_epoch"}, $co->{"${who}_tz"});
3846                 print "<tr><td>$who</td><td>" .
3847                       format_search_author($co->{"${who}_name"}, $who,
3848                                esc_html($co->{"${who}_name"})) . " " .
3849                       format_search_author($co->{"${who}_email"}, $who,
3850                                esc_html("<" . $co->{"${who}_email"} . ">")) .
3851                       "</td><td rowspan=\"2\">" .
3852                       git_get_avatar($co->{"${who}_email"}, -size => 'double') .
3853                       "</td></tr>\n" .
3854                       "<tr>" .
3855                       "<td></td><td> $wd{'rfc2822'}";
3856                 print_local_time(%wd);
3857                 print "</td>" .
3858                       "</tr>\n";
3859         }
3860 }
3861
3862 sub git_print_page_path {
3863         my $name = shift;
3864         my $type = shift;
3865         my $hb = shift;
3866
3867
3868         print "<div class=\"page_path\">";
3869         print $cgi->a({-href => href(action=>"tree", hash_base=>$hb),
3870                       -title => 'tree root'}, to_utf8("[$project]"));
3871         print " / ";
3872         if (defined $name) {
3873                 my @dirname = split '/', $name;
3874                 my $basename = pop @dirname;
3875                 my $fullname = '';
3876
3877                 foreach my $dir (@dirname) {
3878                         $fullname .= ($fullname ? '/' : '') . $dir;
3879                         print $cgi->a({-href => href(action=>"tree", file_name=>$fullname,
3880                                                      hash_base=>$hb),
3881                                       -title => $fullname}, esc_path($dir));
3882                         print " / ";
3883                 }
3884                 if (defined $type && $type eq 'blob') {
3885                         print $cgi->a({-href => href(action=>"blob_plain", file_name=>$file_name,
3886                                                      hash_base=>$hb),
3887                                       -title => $name}, esc_path($basename));
3888                 } elsif (defined $type && $type eq 'tree') {
3889                         print $cgi->a({-href => href(action=>"tree", file_name=>$file_name,
3890                                                      hash_base=>$hb),
3891                                       -title => $name}, esc_path($basename));
3892                         print " / ";
3893                 } else {
3894                         print esc_path($basename);
3895                 }
3896         }
3897         print "<br/></div>\n";
3898 }
3899
3900 sub git_print_log {
3901         my $log = shift;
3902         my %opts = @_;
3903
3904         if ($opts{'-remove_title'}) {
3905                 # remove title, i.e. first line of log
3906                 shift @$log;
3907         }
3908         # remove leading empty lines
3909         while (defined $log->[0] && $log->[0] eq "") {
3910                 shift @$log;
3911         }
3912
3913         # print log
3914         my $signoff = 0;
3915         my $empty = 0;
3916         foreach my $line (@$log) {
3917                 if ($line =~ m/^ *(signed[ \-]off[ \-]by[ :]|acked[ \-]by[ :]|cc[ :])/i) {
3918                         $signoff = 1;
3919                         $empty = 0;
3920                         if (! $opts{'-remove_signoff'}) {
3921                                 print "<span class=\"signoff\">" . esc_html($line) . "</span><br/>\n";
3922                                 next;
3923                         } else {
3924                                 # remove signoff lines
3925                                 next;
3926                         }
3927                 } else {
3928                         $signoff = 0;
3929                 }
3930
3931                 # print only one empty line
3932                 # do not print empty line after signoff
3933                 if ($line eq "") {
3934                         next if ($empty || $signoff);
3935                         $empty = 1;
3936                 } else {
3937                         $empty = 0;
3938                 }
3939
3940                 print format_log_line_html($line) . "<br/>\n";
3941         }
3942
3943         if ($opts{'-final_empty_line'}) {
3944                 # end with single empty line
3945                 print "<br/>\n" unless $empty;
3946         }
3947 }
3948
3949 # return link target (what link points to)
3950 sub git_get_link_target {
3951         my $hash = shift;
3952         my $link_target;
3953
3954         # read link
3955         open my $fd, "-|", git_cmd(), "cat-file", "blob", $hash
3956                 or return;
3957         {
3958                 local $/ = undef;
3959                 $link_target = <$fd>;
3960         }
3961         close $fd
3962                 or return;
3963
3964         return $link_target;
3965 }
3966
3967 # given link target, and the directory (basedir) the link is in,
3968 # return target of link relative to top directory (top tree);
3969 # return undef if it is not possible (including absolute links).
3970 sub normalize_link_target {
3971         my ($link_target, $basedir) = @_;
3972
3973         # absolute symlinks (beginning with '/') cannot be normalized
3974         return if (substr($link_target, 0, 1) eq '/');
3975
3976         # normalize link target to path from top (root) tree (dir)
3977         my $path;
3978         if ($basedir) {
3979                 $path = $basedir . '/' . $link_target;
3980         } else {
3981                 # we are in top (root) tree (dir)
3982                 $path = $link_target;
3983         }
3984
3985         # remove //, /./, and /../
3986         my @path_parts;
3987         foreach my $part (split('/', $path)) {
3988                 # discard '.' and ''
3989                 next if (!$part || $part eq '.');
3990                 # handle '..'
3991                 if ($part eq '..') {
3992                         if (@path_parts) {
3993                                 pop @path_parts;
3994                         } else {
3995                                 # link leads outside repository (outside top dir)
3996                                 return;
3997                         }
3998                 } else {
3999                         push @path_parts, $part;
4000                 }
4001         }
4002         $path = join('/', @path_parts);
4003
4004         return $path;
4005 }
4006
4007 # print tree entry (row of git_tree), but without encompassing <tr> element
4008 sub git_print_tree_entry {
4009         my ($t, $basedir, $hash_base, $have_blame) = @_;
4010
4011         my %base_key = ();
4012         $base_key{'hash_base'} = $hash_base if defined $hash_base;
4013
4014         # The format of a table row is: mode list link.  Where mode is
4015         # the mode of the entry, list is the name of the entry, an href,
4016         # and link is the action links of the entry.
4017
4018         print "<td class=\"mode\">" . mode_str($t->{'mode'}) . "</td>\n";
4019         if (exists $t->{'size'}) {
4020                 print "<td class=\"size\">$t->{'size'}</td>\n";
4021         }
4022         if ($t->{'type'} eq "blob") {
4023                 print "<td class=\"list\">" .
4024                         $cgi->a({-href => href(action=>"blob", hash=>$t->{'hash'},
4025                                                file_name=>"$basedir$t->{'name'}", %base_key),
4026                                 -class => "list"}, esc_path($t->{'name'}));
4027                 if (S_ISLNK(oct $t->{'mode'})) {
4028                         my $link_target = git_get_link_target($t->{'hash'});
4029                         if ($link_target) {
4030                                 my $norm_target = normalize_link_target($link_target, $basedir);
4031                                 if (defined $norm_target) {
4032                                         print " -> " .
4033                                               $cgi->a({-href => href(action=>"object", hash_base=>$hash_base,
4034                                                                      file_name=>$norm_target),
4035                                                        -title => $norm_target}, esc_path($link_target));
4036                                 } else {
4037                                         print " -> " . esc_path($link_target);
4038                                 }
4039                         }
4040                 }
4041                 print "</td>\n";
4042                 print "<td class=\"link\">";
4043                 print $cgi->a({-href => href(action=>"blob", hash=>$t->{'hash'},
4044                                              file_name=>"$basedir$t->{'name'}", %base_key)},
4045                               "blob");
4046                 if ($have_blame) {
4047                         print " | " .
4048                               $cgi->a({-href => href(action=>"blame", hash=>$t->{'hash'},
4049                                                      file_name=>"$basedir$t->{'name'}", %base_key)},
4050                                       "blame");
4051                 }
4052                 if (defined $hash_base) {
4053                         print " | " .
4054                               $cgi->a({-href => href(action=>"history", hash_base=>$hash_base,
4055                                                      hash=>$t->{'hash'}, file_name=>"$basedir$t->{'name'}")},
4056                                       "history");
4057                 }
4058                 print " | " .
4059                         $cgi->a({-href => href(action=>"blob_plain", hash_base=>$hash_base,
4060                                                file_name=>"$basedir$t->{'name'}")},
4061                                 "raw");
4062                 print "</td>\n";
4063
4064         } elsif ($t->{'type'} eq "tree") {
4065                 print "<td class=\"list\">";
4066                 print $cgi->a({-href => href(action=>"tree", hash=>$t->{'hash'},
4067                                              file_name=>"$basedir$t->{'name'}",
4068                                              %base_key)},
4069                               esc_path($t->{'name'}));
4070                 print "</td>\n";
4071                 print "<td class=\"link\">";
4072                 print $cgi->a({-href => href(action=>"tree", hash=>$t->{'hash'},
4073                                              file_name=>"$basedir$t->{'name'}",
4074                                              %base_key)},
4075                               "tree");
4076                 if (defined $hash_base) {
4077                         print " | " .
4078                               $cgi->a({-href => href(action=>"history", hash_base=>$hash_base,
4079                                                      file_name=>"$basedir$t->{'name'}")},
4080                                       "history");
4081                 }
4082                 print "</td>\n";
4083         } else {
4084                 # unknown object: we can only present history for it
4085                 # (this includes 'commit' object, i.e. submodule support)
4086                 print "<td class=\"list\">" .
4087                       esc_path($t->{'name'}) .
4088                       "</td>\n";
4089                 print "<td class=\"link\">";
4090                 if (defined $hash_base) {
4091                         print $cgi->a({-href => href(action=>"history",
4092                                                      hash_base=>$hash_base,
4093                                                      file_name=>"$basedir$t->{'name'}")},
4094                                       "history");
4095                 }
4096                 print "</td>\n";
4097         }
4098 }
4099
4100 ## ......................................................................
4101 ## functions printing large fragments of HTML
4102
4103 # get pre-image filenames for merge (combined) diff
4104 sub fill_from_file_info {
4105         my ($diff, @parents) = @_;
4106
4107         $diff->{'from_file'} = [ ];
4108         $diff->{'from_file'}[$diff->{'nparents'} - 1] = undef;
4109         for (my $i = 0; $i < $diff->{'nparents'}; $i++) {
4110                 if ($diff->{'status'}[$i] eq 'R' ||
4111                     $diff->{'status'}[$i] eq 'C') {
4112                         $diff->{'from_file'}[$i] =
4113                                 git_get_path_by_hash($parents[$i], $diff->{'from_id'}[$i]);
4114                 }
4115         }
4116
4117         return $diff;
4118 }
4119
4120 # is current raw difftree line of file deletion
4121 sub is_deleted {
4122         my $diffinfo = shift;
4123
4124         return $diffinfo->{'to_id'} eq ('0' x 40);
4125 }
4126
4127 # does patch correspond to [previous] difftree raw line
4128 # $diffinfo  - hashref of parsed raw diff format
4129 # $patchinfo - hashref of parsed patch diff format
4130 #              (the same keys as in $diffinfo)
4131 sub is_patch_split {
4132         my ($diffinfo, $patchinfo) = @_;
4133
4134         return defined $diffinfo && defined $patchinfo
4135                 && $diffinfo->{'to_file'} eq $patchinfo->{'to_file'};
4136 }
4137
4138
4139 sub git_difftree_body {
4140         my ($difftree, $hash, @parents) = @_;
4141         my ($parent) = $parents[0];
4142         my $have_blame = gitweb_check_feature('blame');
4143         print "<div class=\"list_head\">\n";
4144         if ($#{$difftree} > 10) {
4145                 print(($#{$difftree} + 1) . " files changed:\n");
4146         }
4147         print "</div>\n";
4148
4149         print "<table class=\"" .
4150               (@parents > 1 ? "combined " : "") .
4151               "diff_tree\">\n";
4152
4153         # header only for combined diff in 'commitdiff' view
4154         my $has_header = @$difftree && @parents > 1 && $action eq 'commitdiff';
4155         if ($has_header) {
4156                 # table header
4157                 print "<thead><tr>\n" .
4158                        "<th></th><th></th>\n"; # filename, patchN link
4159                 for (my $i = 0; $i < @parents; $i++) {
4160                         my $par = $parents[$i];
4161                         print "<th>" .
4162                               $cgi->a({-href => href(action=>"commitdiff",
4163                                                      hash=>$hash, hash_parent=>$par),
4164                                        -title => 'commitdiff to parent number ' .
4165                                                   ($i+1) . ': ' . substr($par,0,7)},
4166                                       $i+1) .
4167                               "&nbsp;</th>\n";
4168                 }
4169                 print "</tr></thead>\n<tbody>\n";
4170         }
4171
4172         my $alternate = 1;
4173         my $patchno = 0;
4174         foreach my $line (@{$difftree}) {
4175                 my $diff = parsed_difftree_line($line);
4176
4177                 if ($alternate) {
4178                         print "<tr class=\"dark\">\n";
4179                 } else {
4180                         print "<tr class=\"light\">\n";
4181                 }
4182                 $alternate ^= 1;
4183
4184                 if (exists $diff->{'nparents'}) { # combined diff
4185
4186                         fill_from_file_info($diff, @parents)
4187                                 unless exists $diff->{'from_file'};
4188
4189                         if (!is_deleted($diff)) {
4190                                 # file exists in the result (child) commit
4191                                 print "<td>" .
4192                                       $cgi->a({-href => href(action=>"blob", hash=>$diff->{'to_id'},
4193                                                              file_name=>$diff->{'to_file'},
4194                                                              hash_base=>$hash),
4195                                               -class => "list"}, esc_path($diff->{'to_file'})) .
4196                                       "</td>\n";
4197                         } else {
4198                                 print "<td>" .
4199                                       esc_path($diff->{'to_file'}) .
4200                                       "</td>\n";
4201                         }
4202
4203                         if ($action eq 'commitdiff') {
4204                                 # link to patch
4205                                 $patchno++;
4206                                 print "<td class=\"link\">" .
4207                                       $cgi->a({-href => "#patch$patchno"}, "patch") .
4208                                       " | " .
4209                                       "</td>\n";
4210                         }
4211
4212                         my $has_history = 0;
4213                         my $not_deleted = 0;
4214                         for (my $i = 0; $i < $diff->{'nparents'}; $i++) {
4215                                 my $hash_parent = $parents[$i];
4216                                 my $from_hash = $diff->{'from_id'}[$i];
4217                                 my $from_path = $diff->{'from_file'}[$i];
4218                                 my $status = $diff->{'status'}[$i];
4219
4220                                 $has_history ||= ($status ne 'A');
4221                                 $not_deleted ||= ($status ne 'D');
4222
4223                                 if ($status eq 'A') {
4224                                         print "<td  class=\"link\" align=\"right\"> | </td>\n";
4225                                 } elsif ($status eq 'D') {
4226                                         print "<td class=\"link\">" .
4227                                               $cgi->a({-href => href(action=>"blob",
4228                                                                      hash_base=>$hash,
4229                                                                      hash=>$from_hash,
4230                                                                      file_name=>$from_path)},
4231                                                       "blob" . ($i+1)) .
4232                                               " | </td>\n";
4233                                 } else {
4234                                         if ($diff->{'to_id'} eq $from_hash) {
4235                                                 print "<td class=\"link nochange\">";
4236                                         } else {
4237                                                 print "<td class=\"link\">";
4238                                         }
4239                                         print $cgi->a({-href => href(action=>"blobdiff",
4240                                                                      hash=>$diff->{'to_id'},
4241                                                                      hash_parent=>$from_hash,
4242                                                                      hash_base=>$hash,
4243                                                                      hash_parent_base=>$hash_parent,
4244                                                                      file_name=>$diff->{'to_file'},
4245                                                                      file_parent=>$from_path)},
4246                                                       "diff" . ($i+1)) .
4247                                               " | </td>\n";
4248                                 }
4249                         }
4250
4251                         print "<td class=\"link\">";
4252                         if ($not_deleted) {
4253                                 print $cgi->a({-href => href(action=>"blob",
4254                                                              hash=>$diff->{'to_id'},
4255                                                              file_name=>$diff->{'to_file'},
4256                                                              hash_base=>$hash)},
4257                                               "blob");
4258                                 print " | " if ($has_history);
4259                         }
4260                         if ($has_history) {
4261                                 print $cgi->a({-href => href(action=>"history",
4262                                                              file_name=>$diff->{'to_file'},
4263                                                              hash_base=>$hash)},
4264                                               "history");
4265                         }
4266                         print "</td>\n";
4267
4268                         print "</tr>\n";
4269                         next; # instead of 'else' clause, to avoid extra indent
4270                 }
4271                 # else ordinary diff
4272
4273                 my ($to_mode_oct, $to_mode_str, $to_file_type);
4274                 my ($from_mode_oct, $from_mode_str, $from_file_type);
4275                 if ($diff->{'to_mode'} ne ('0' x 6)) {
4276                         $to_mode_oct = oct $diff->{'to_mode'};
4277                         if (S_ISREG($to_mode_oct)) { # only for regular file
4278                                 $to_mode_str = sprintf("%04o", $to_mode_oct & 0777); # permission bits
4279                         }
4280                         $to_file_type = file_type($diff->{'to_mode'});
4281                 }
4282                 if ($diff->{'from_mode'} ne ('0' x 6)) {
4283                         $from_mode_oct = oct $diff->{'from_mode'};
4284                         if (S_ISREG($to_mode_oct)) { # only for regular file
4285                                 $from_mode_str = sprintf("%04o", $from_mode_oct & 0777); # permission bits
4286                         }
4287                         $from_file_type = file_type($diff->{'from_mode'});
4288                 }
4289
4290                 if ($diff->{'status'} eq "A") { # created
4291                         my $mode_chng = "<span class=\"file_status new\">[new $to_file_type";
4292                         $mode_chng   .= " with mode: $to_mode_str" if $to_mode_str;
4293                         $mode_chng   .= "]</span>";
4294                         print "<td>";
4295                         print $cgi->a({-href => href(action=>"blob", hash=>$diff->{'to_id'},
4296                                                      hash_base=>$hash, file_name=>$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->{'to_id'},
4308                                                      hash_base=>$hash, file_name=>$diff->{'file'})},
4309                                       "blob");
4310                         print "</td>\n";
4311
4312                 } elsif ($diff->{'status'} eq "D") { # deleted
4313                         my $mode_chng = "<span class=\"file_status deleted\">[deleted $from_file_type]</span>";
4314                         print "<td>";
4315                         print $cgi->a({-href => href(action=>"blob", hash=>$diff->{'from_id'},
4316                                                      hash_base=>$parent, file_name=>$diff->{'file'}),
4317                                        -class => "list"}, esc_path($diff->{'file'}));
4318                         print "</td>\n";
4319                         print "<td>$mode_chng</td>\n";
4320                         print "<td class=\"link\">";
4321                         if ($action eq 'commitdiff') {
4322                                 # link to patch
4323                                 $patchno++;
4324                                 print $cgi->a({-href => "#patch$patchno"}, "patch");
4325                                 print " | ";
4326                         }
4327                         print $cgi->a({-href => href(action=>"blob", hash=>$diff->{'from_id'},
4328                                                      hash_base=>$parent, file_name=>$diff->{'file'})},
4329                                       "blob") . " | ";
4330                         if ($have_blame) {
4331                                 print $cgi->a({-href => href(action=>"blame", hash_base=>$parent,
4332                                                              file_name=>$diff->{'file'})},
4333                                               "blame") . " | ";
4334                         }
4335                         print $cgi->a({-href => href(action=>"history", hash_base=>$parent,
4336                                                      file_name=>$diff->{'file'})},
4337                                       "history");
4338                         print "</td>\n";
4339
4340                 } elsif ($diff->{'status'} eq "M" || $diff->{'status'} eq "T") { # modified, or type changed
4341                         my $mode_chnge = "";
4342                         if ($diff->{'from_mode'} != $diff->{'to_mode'}) {
4343                                 $mode_chnge = "<span class=\"file_status mode_chnge\">[changed";
4344                                 if ($from_file_type ne $to_file_type) {
4345                                         $mode_chnge .= " from $from_file_type to $to_file_type";
4346                                 }
4347                                 if (($from_mode_oct & 0777) != ($to_mode_oct & 0777)) {
4348                                         if ($from_mode_str && $to_mode_str) {
4349                                                 $mode_chnge .= " mode: $from_mode_str->$to_mode_str";
4350                                         } elsif ($to_mode_str) {
4351                                                 $mode_chnge .= " mode: $to_mode_str";
4352                                         }
4353                                 }
4354                                 $mode_chnge .= "]</span>\n";
4355                         }
4356                         print "<td>";
4357                         print $cgi->a({-href => href(action=>"blob", hash=>$diff->{'to_id'},
4358                                                      hash_base=>$hash, file_name=>$diff->{'file'}),
4359                                       -class => "list"}, esc_path($diff->{'file'}));
4360                         print "</td>\n";
4361                         print "<td>$mode_chnge</td>\n";
4362                         print "<td class=\"link\">";
4363                         if ($action eq 'commitdiff') {
4364                                 # link to patch
4365                                 $patchno++;
4366                                 print $cgi->a({-href => "#patch$patchno"}, "patch") .
4367                                       " | ";
4368                         } elsif ($diff->{'to_id'} ne $diff->{'from_id'}) {
4369                                 # "commit" view and modified file (not onlu mode changed)
4370                                 print $cgi->a({-href => href(action=>"blobdiff",
4371                                                              hash=>$diff->{'to_id'}, hash_parent=>$diff->{'from_id'},
4372                                                              hash_base=>$hash, hash_parent_base=>$parent,
4373                                                              file_name=>$diff->{'file'})},
4374                                               "diff") .
4375                                       " | ";
4376                         }
4377                         print $cgi->a({-href => href(action=>"blob", hash=>$diff->{'to_id'},
4378                                                      hash_base=>$hash, file_name=>$diff->{'file'})},
4379                                        "blob") . " | ";
4380                         if ($have_blame) {
4381                                 print $cgi->a({-href => href(action=>"blame", hash_base=>$hash,
4382                                                              file_name=>$diff->{'file'})},
4383                                               "blame") . " | ";
4384                         }
4385                         print $cgi->a({-href => href(action=>"history", hash_base=>$hash,
4386                                                      file_name=>$diff->{'file'})},
4387                                       "history");
4388                         print "</td>\n";
4389
4390                 } elsif ($diff->{'status'} eq "R" || $diff->{'status'} eq "C") { # renamed or copied
4391                         my %status_name = ('R' => 'moved', 'C' => 'copied');
4392                         my $nstatus = $status_name{$diff->{'status'}};
4393                         my $mode_chng = "";
4394                         if ($diff->{'from_mode'} != $diff->{'to_mode'}) {
4395                                 # mode also for directories, so we cannot use $to_mode_str
4396                                 $mode_chng = sprintf(", mode: %04o", $to_mode_oct & 0777);
4397                         }
4398                         print "<td>" .
4399                               $cgi->a({-href => href(action=>"blob", hash_base=>$hash,
4400                                                      hash=>$diff->{'to_id'}, file_name=>$diff->{'to_file'}),
4401                                       -class => "list"}, esc_path($diff->{'to_file'})) . "</td>\n" .
4402                               "<td><span class=\"file_status $nstatus\">[$nstatus from " .
4403                               $cgi->a({-href => href(action=>"blob", hash_base=>$parent,
4404                                                      hash=>$diff->{'from_id'}, file_name=>$diff->{'from_file'}),
4405                                       -class => "list"}, esc_path($diff->{'from_file'})) .
4406                               " with " . (int $diff->{'similarity'}) . "% similarity$mode_chng]</span></td>\n" .
4407                               "<td class=\"link\">";
4408                         if ($action eq 'commitdiff') {
4409                                 # link to patch
4410                                 $patchno++;
4411                                 print $cgi->a({-href => "#patch$patchno"}, "patch") .
4412                                       " | ";
4413                         } elsif ($diff->{'to_id'} ne $diff->{'from_id'}) {
4414                                 # "commit" view and modified file (not only pure rename or copy)
4415                                 print $cgi->a({-href => href(action=>"blobdiff",
4416                                                              hash=>$diff->{'to_id'}, hash_parent=>$diff->{'from_id'},
4417                                                              hash_base=>$hash, hash_parent_base=>$parent,
4418                                                              file_name=>$diff->{'to_file'}, file_parent=>$diff->{'from_file'})},
4419                                               "diff") .
4420                                       " | ";
4421                         }
4422                         print $cgi->a({-href => href(action=>"blob", hash=>$diff->{'to_id'},
4423                                                      hash_base=>$parent, file_name=>$diff->{'to_file'})},
4424                                       "blob") . " | ";
4425                         if ($have_blame) {
4426                                 print $cgi->a({-href => href(action=>"blame", hash_base=>$hash,
4427                                                              file_name=>$diff->{'to_file'})},
4428                                               "blame") . " | ";
4429                         }
4430                         print $cgi->a({-href => href(action=>"history", hash_base=>$hash,
4431                                                     file_name=>$diff->{'to_file'})},
4432                                       "history");
4433                         print "</td>\n";
4434
4435                 } # we should not encounter Unmerged (U) or Unknown (X) status
4436                 print "</tr>\n";
4437         }
4438         print "</tbody>" if $has_header;
4439         print "</table>\n";
4440 }
4441
4442 sub git_patchset_body {
4443         my ($fd, $difftree, $hash, @hash_parents) = @_;
4444         my ($hash_parent) = $hash_parents[0];
4445
4446         my $is_combined = (@hash_parents > 1);
4447         my $patch_idx = 0;
4448         my $patch_number = 0;
4449         my $patch_line;
4450         my $diffinfo;
4451         my $to_name;
4452         my (%from, %to);
4453
4454         print "<div class=\"patchset\">\n";
4455
4456         # skip to first patch
4457         while ($patch_line = <$fd>) {
4458                 chomp $patch_line;
4459
4460                 last if ($patch_line =~ m/^diff /);
4461         }
4462
4463  PATCH:
4464         while ($patch_line) {
4465
4466                 # parse "git diff" header line
4467                 if ($patch_line =~ m/^diff --git (\"(?:[^\\\"]*(?:\\.[^\\\"]*)*)\"|[^ "]*) (.*)$/) {
4468                         # $1 is from_name, which we do not use
4469                         $to_name = unquote($2);
4470                         $to_name =~ s!^b/!!;
4471                 } elsif ($patch_line =~ m/^diff --(cc|combined) ("?.*"?)$/) {
4472                         # $1 is 'cc' or 'combined', which we do not use
4473                         $to_name = unquote($2);
4474                 } else {
4475                         $to_name = undef;
4476                 }
4477
4478                 # check if current patch belong to current raw line
4479                 # and parse raw git-diff line if needed
4480                 if (is_patch_split($diffinfo, { 'to_file' => $to_name })) {
4481                         # this is continuation of a split patch
4482                         print "<div class=\"patch cont\">\n";
4483                 } else {
4484                         # advance raw git-diff output if needed
4485                         $patch_idx++ if defined $diffinfo;
4486
4487                         # read and prepare patch information
4488                         $diffinfo = parsed_difftree_line($difftree->[$patch_idx]);
4489
4490                         # compact combined diff output can have some patches skipped
4491                         # find which patch (using pathname of result) we are at now;
4492                         if ($is_combined) {
4493                                 while ($to_name ne $diffinfo->{'to_file'}) {
4494                                         print "<div class=\"patch\" id=\"patch". ($patch_idx+1) ."\">\n" .
4495                                               format_diff_cc_simplified($diffinfo, @hash_parents) .
4496                                               "</div>\n";  # class="patch"
4497
4498                                         $patch_idx++;
4499                                         $patch_number++;
4500
4501                                         last if $patch_idx > $#$difftree;
4502                                         $diffinfo = parsed_difftree_line($difftree->[$patch_idx]);
4503                                 }
4504                         }
4505
4506                         # modifies %from, %to hashes
4507                         parse_from_to_diffinfo($diffinfo, \%from, \%to, @hash_parents);
4508
4509                         # this is first patch for raw difftree line with $patch_idx index
4510                         # we index @$difftree array from 0, but number patches from 1
4511                         print "<div class=\"patch\" id=\"patch". ($patch_idx+1) ."\">\n";
4512                 }
4513
4514                 # git diff header
4515                 #assert($patch_line =~ m/^diff /) if DEBUG;
4516                 #assert($patch_line !~ m!$/$!) if DEBUG; # is chomp-ed
4517                 $patch_number++;
4518                 # print "git diff" header
4519                 print format_git_diff_header_line($patch_line, $diffinfo,
4520                                                   \%from, \%to);
4521
4522                 # print extended diff header
4523                 print "<div class=\"diff extended_header\">\n";
4524         EXTENDED_HEADER:
4525                 while ($patch_line = <$fd>) {
4526                         chomp $patch_line;
4527
4528                         last EXTENDED_HEADER if ($patch_line =~ m/^--- |^diff /);
4529
4530                         print format_extended_diff_header_line($patch_line, $diffinfo,
4531                                                                \%from, \%to);
4532                 }
4533                 print "</div>\n"; # class="diff extended_header"
4534
4535                 # from-file/to-file diff header
4536                 if (! $patch_line) {
4537                         print "</div>\n"; # class="patch"
4538                         last PATCH;
4539                 }
4540                 next PATCH if ($patch_line =~ m/^diff /);
4541                 #assert($patch_line =~ m/^---/) if DEBUG;
4542
4543                 my $last_patch_line = $patch_line;
4544                 $patch_line = <$fd>;
4545                 chomp $patch_line;
4546                 #assert($patch_line =~ m/^\+\+\+/) if DEBUG;
4547
4548                 print format_diff_from_to_header($last_patch_line, $patch_line,
4549                                                  $diffinfo, \%from, \%to,
4550                                                  @hash_parents);
4551
4552                 # the patch itself
4553         LINE:
4554                 while ($patch_line = <$fd>) {
4555                         chomp $patch_line;
4556
4557                         next PATCH if ($patch_line =~ m/^diff /);
4558
4559                         print format_diff_line($patch_line, \%from, \%to);
4560                 }
4561
4562         } continue {
4563                 print "</div>\n"; # class="patch"
4564         }
4565
4566         # for compact combined (--cc) format, with chunk and patch simplification
4567         # the patchset might be empty, but there might be unprocessed raw lines
4568         for (++$patch_idx if $patch_number > 0;
4569              $patch_idx < @$difftree;
4570              ++$patch_idx) {
4571                 # read and prepare patch information
4572                 $diffinfo = parsed_difftree_line($difftree->[$patch_idx]);
4573
4574                 # generate anchor for "patch" links in difftree / whatchanged part
4575                 print "<div class=\"patch\" id=\"patch". ($patch_idx+1) ."\">\n" .
4576                       format_diff_cc_simplified($diffinfo, @hash_parents) .
4577                       "</div>\n";  # class="patch"
4578
4579                 $patch_number++;
4580         }
4581
4582         if ($patch_number == 0) {
4583                 if (@hash_parents > 1) {
4584                         print "<div class=\"diff nodifferences\">Trivial merge</div>\n";
4585                 } else {
4586                         print "<div class=\"diff nodifferences\">No differences found</div>\n";
4587                 }
4588         }
4589
4590         print "</div>\n"; # class="patchset"
4591 }
4592
4593 # . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
4594
4595 # fills project list info (age, description, owner, forks) for each
4596 # project in the list, removing invalid projects from returned list
4597 # NOTE: modifies $projlist, but does not remove entries from it
4598 sub fill_project_list_info {
4599         my ($projlist, $check_forks) = @_;
4600         my @projects;
4601
4602         my $show_ctags = gitweb_check_feature('ctags');
4603  PROJECT:
4604         foreach my $pr (@$projlist) {
4605                 my (@activity) = git_get_last_activity($pr->{'path'});
4606                 unless (@activity) {
4607                         next PROJECT;
4608                 }
4609                 ($pr->{'age'}, $pr->{'age_string'}) = @activity;
4610                 if (!defined $pr->{'descr'}) {
4611                         my $descr = git_get_project_description($pr->{'path'}) || "";
4612                         $descr = to_utf8($descr);
4613                         $pr->{'descr_long'} = $descr;
4614                         $pr->{'descr'} = chop_str($descr, $projects_list_description_width, 5);
4615                 }
4616                 if (!defined $pr->{'owner'}) {
4617                         $pr->{'owner'} = git_get_project_owner("$pr->{'path'}") || "";
4618                 }
4619                 if ($check_forks) {
4620                         my $pname = $pr->{'path'};
4621                         if (($pname =~ s/\.git$//) &&
4622                             ($pname !~ /\/$/) &&
4623                             (-d "$projectroot/$pname")) {
4624                                 $pr->{'forks'} = "-d $projectroot/$pname";
4625                         } else {
4626                                 $pr->{'forks'} = 0;
4627                         }
4628                 }
4629                 $show_ctags and $pr->{'ctags'} = git_get_project_ctags($pr->{'path'});
4630                 push @projects, $pr;
4631         }
4632
4633         return @projects;
4634 }
4635
4636 # print 'sort by' <th> element, generating 'sort by $name' replay link
4637 # if that order is not selected
4638 sub print_sort_th {
4639         print format_sort_th(@_);
4640 }
4641
4642 sub format_sort_th {
4643         my ($name, $order, $header) = @_;
4644         my $sort_th = "";
4645         $header ||= ucfirst($name);
4646
4647         if ($order eq $name) {
4648                 $sort_th .= "<th>$header</th>\n";
4649         } else {
4650                 $sort_th .= "<th>" .
4651                             $cgi->a({-href => href(-replay=>1, order=>$name),
4652                                      -class => "header"}, $header) .
4653                             "</th>\n";
4654         }
4655
4656         return $sort_th;
4657 }
4658
4659 sub git_project_list_body {
4660         # actually uses global variable $project
4661         my ($projlist, $order, $from, $to, $extra, $no_header) = @_;
4662
4663         my $check_forks = gitweb_check_feature('forks');
4664         my @projects = fill_project_list_info($projlist, $check_forks);
4665
4666         $order ||= $default_projects_order;
4667         $from = 0 unless defined $from;
4668         $to = $#projects if (!defined $to || $#projects < $to);
4669
4670         my %order_info = (
4671                 project => { key => 'path', type => 'str' },
4672                 descr => { key => 'descr_long', type => 'str' },
4673                 owner => { key => 'owner', type => 'str' },
4674                 age => { key => 'age', type => 'num' }
4675         );
4676         my $oi = $order_info{$order};
4677         if ($oi->{'type'} eq 'str') {
4678                 @projects = sort {$a->{$oi->{'key'}} cmp $b->{$oi->{'key'}}} @projects;
4679         } else {
4680                 @projects = sort {$a->{$oi->{'key'}} <=> $b->{$oi->{'key'}}} @projects;
4681         }
4682
4683         my $show_ctags = gitweb_check_feature('ctags');
4684         if ($show_ctags) {
4685                 my %ctags;
4686                 foreach my $p (@projects) {
4687                         foreach my $ct (keys %{$p->{'ctags'}}) {
4688                                 $ctags{$ct} += $p->{'ctags'}->{$ct};
4689                         }
4690                 }
4691                 my $cloud = git_populate_project_tagcloud(\%ctags);
4692                 print git_show_project_tagcloud($cloud, 64);
4693         }
4694
4695         print "<table class=\"project_list\">\n";
4696         unless ($no_header) {
4697                 print "<tr>\n";
4698                 if ($check_forks) {
4699                         print "<th></th>\n";
4700                 }
4701                 print_sort_th('project', $order, 'Project');
4702                 print_sort_th('descr', $order, 'Description');
4703                 print_sort_th('owner', $order, 'Owner');
4704                 print_sort_th('age', $order, 'Last Change');
4705                 print "<th></th>\n" . # for links
4706                       "</tr>\n";
4707         }
4708         my $alternate = 1;
4709         my $tagfilter = $cgi->param('by_tag');
4710         for (my $i = $from; $i <= $to; $i++) {
4711                 my $pr = $projects[$i];
4712
4713                 next if $tagfilter and $show_ctags and not grep { lc $_ eq lc $tagfilter } keys %{$pr->{'ctags'}};
4714                 next if $searchtext and not $pr->{'path'} =~ /$searchtext/
4715                         and not $pr->{'descr_long'} =~ /$searchtext/;
4716                 # Weed out forks or non-matching entries of search
4717                 if ($check_forks) {
4718                         my $forkbase = $project; $forkbase ||= ''; $forkbase =~ s#\.git$#/#;
4719                         $forkbase="^$forkbase" if $forkbase;
4720                         next if not $searchtext and not $tagfilter and $show_ctags
4721                                 and $pr->{'path'} =~ m#$forkbase.*/.*#; # regexp-safe
4722                 }
4723
4724                 if ($alternate) {
4725                         print "<tr class=\"dark\">\n";
4726                 } else {
4727                         print "<tr class=\"light\">\n";
4728                 }
4729                 $alternate ^= 1;
4730                 if ($check_forks) {
4731                         print "<td>";
4732                         if ($pr->{'forks'}) {
4733                                 print "<!-- $pr->{'forks'} -->\n";
4734                                 print $cgi->a({-href => href(project=>$pr->{'path'}, action=>"forks")}, "+");
4735                         }
4736                         print "</td>\n";
4737                 }
4738                 print "<td>" . $cgi->a({-href => href(project=>$pr->{'path'}, action=>"summary"),
4739                                         -class => "list"}, esc_html($pr->{'path'})) . "</td>\n" .
4740                       "<td>" . $cgi->a({-href => href(project=>$pr->{'path'}, action=>"summary"),
4741                                         -class => "list", -title => $pr->{'descr_long'}},
4742                                         esc_html($pr->{'descr'})) . "</td>\n" .
4743                       "<td><i>" . chop_and_escape_str($pr->{'owner'}, 15) . "</i></td>\n";
4744                 print "<td class=\"". age_class($pr->{'age'}) . "\">" .
4745                       (defined $pr->{'age_string'} ? $pr->{'age_string'} : "No commits") . "</td>\n" .
4746                       "<td class=\"link\">" .
4747                       $cgi->a({-href => href(project=>$pr->{'path'}, action=>"summary")}, "summary")   . " | " .
4748                       $cgi->a({-href => href(project=>$pr->{'path'}, action=>"shortlog")}, "shortlog") . " | " .
4749                       $cgi->a({-href => href(project=>$pr->{'path'}, action=>"log")}, "log") . " | " .
4750                       $cgi->a({-href => href(project=>$pr->{'path'}, action=>"tree")}, "tree") .
4751                       ($pr->{'forks'} ? " | " . $cgi->a({-href => href(project=>$pr->{'path'}, action=>"forks")}, "forks") : '') .
4752                       "</td>\n" .
4753                       "</tr>\n";
4754         }
4755         if (defined $extra) {
4756                 print "<tr>\n";
4757                 if ($check_forks) {
4758                         print "<td></td>\n";
4759                 }
4760                 print "<td colspan=\"5\">$extra</td>\n" .
4761                       "</tr>\n";
4762         }
4763         print "</table>\n";
4764 }
4765
4766 sub git_log_body {
4767         # uses global variable $project
4768         my ($commitlist, $from, $to, $refs, $extra) = @_;
4769
4770         $from = 0 unless defined $from;
4771         $to = $#{$commitlist} if (!defined $to || $#{$commitlist} < $to);
4772
4773         for (my $i = 0; $i <= $to; $i++) {
4774                 my %co = %{$commitlist->[$i]};
4775                 next if !%co;
4776                 my $commit = $co{'id'};
4777                 my $ref = format_ref_marker($refs, $commit);
4778                 my %ad = parse_date($co{'author_epoch'});
4779                 git_print_header_div('commit',
4780                                "<span class=\"age\">$co{'age_string'}</span>" .
4781                                esc_html($co{'title'}) . $ref,
4782                                $commit);
4783                 print "<div class=\"title_text\">\n" .
4784                       "<div class=\"log_link\">\n" .
4785                       $cgi->a({-href => href(action=>"commit", hash=>$commit)}, "commit") .
4786                       " | " .
4787                       $cgi->a({-href => href(action=>"commitdiff", hash=>$commit)}, "commitdiff") .
4788                       " | " .
4789                       $cgi->a({-href => href(action=>"tree", hash=>$commit, hash_base=>$commit)}, "tree") .
4790                       "<br/>\n" .
4791                       "</div>\n";
4792                       git_print_authorship(\%co, -tag => 'span');
4793                       print "<br/>\n</div>\n";
4794
4795                 print "<div class=\"log_body\">\n";
4796                 git_print_log($co{'comment'}, -final_empty_line=> 1);
4797                 print "</div>\n";
4798         }
4799         if ($extra) {
4800                 print "<div class=\"page_nav\">\n";
4801                 print "$extra\n";
4802                 print "</div>\n";
4803         }
4804 }
4805
4806 sub git_shortlog_body {
4807         # uses global variable $project
4808         my ($commitlist, $from, $to, $refs, $extra) = @_;
4809
4810         $from = 0 unless defined $from;
4811         $to = $#{$commitlist} if (!defined $to || $#{$commitlist} < $to);
4812
4813         print "<table class=\"shortlog\">\n";
4814         my $alternate = 1;
4815         for (my $i = $from; $i <= $to; $i++) {
4816                 my %co = %{$commitlist->[$i]};
4817                 my $commit = $co{'id'};
4818                 my $ref = format_ref_marker($refs, $commit);
4819                 if ($alternate) {
4820                         print "<tr class=\"dark\">\n";
4821                 } else {
4822                         print "<tr class=\"light\">\n";
4823                 }
4824                 $alternate ^= 1;
4825                 # git_summary() used print "<td><i>$co{'age_string'}</i></td>\n" .
4826                 print "<td title=\"$co{'age_string_age'}\"><i>$co{'age_string_date'}</i></td>\n" .
4827                       format_author_html('td', \%co, 10) . "<td>";
4828                 print format_subject_html($co{'title'}, $co{'title_short'},
4829                                           href(action=>"commit", hash=>$commit), $ref);
4830                 print "</td>\n" .
4831                       "<td class=\"link\">" .
4832                       $cgi->a({-href => href(action=>"commit", hash=>$commit)}, "commit") . " | " .
4833                       $cgi->a({-href => href(action=>"commitdiff", hash=>$commit)}, "commitdiff") . " | " .
4834                       $cgi->a({-href => href(action=>"tree", hash=>$commit, hash_base=>$commit)}, "tree");
4835                 my $snapshot_links = format_snapshot_links($commit);
4836                 if (defined $snapshot_links) {
4837                         print " | " . $snapshot_links;
4838                 }
4839                 print "</td>\n" .
4840                       "</tr>\n";
4841         }
4842         if (defined $extra) {
4843                 print "<tr>\n" .
4844                       "<td colspan=\"4\">$extra</td>\n" .
4845                       "</tr>\n";
4846         }
4847         print "</table>\n";
4848 }
4849
4850 sub git_history_body {
4851         # Warning: assumes constant type (blob or tree) during history
4852         my ($commitlist, $from, $to, $refs, $extra,
4853             $file_name, $file_hash, $ftype) = @_;
4854
4855         $from = 0 unless defined $from;
4856         $to = $#{$commitlist} unless (defined $to && $to <= $#{$commitlist});
4857
4858         print "<table class=\"history\">\n";
4859         my $alternate = 1;
4860         for (my $i = $from; $i <= $to; $i++) {
4861                 my %co = %{$commitlist->[$i]};
4862                 if (!%co) {
4863                         next;
4864                 }
4865                 my $commit = $co{'id'};
4866
4867                 my $ref = format_ref_marker($refs, $commit);
4868
4869                 if ($alternate) {
4870                         print "<tr class=\"dark\">\n";
4871                 } else {
4872                         print "<tr class=\"light\">\n";
4873                 }
4874                 $alternate ^= 1;
4875                 print "<td title=\"$co{'age_string_age'}\"><i>$co{'age_string_date'}</i></td>\n" .
4876         # shortlog:   format_author_html('td', \%co, 10)
4877                       format_author_html('td', \%co, 15, 3) . "<td>";
4878                 # originally git_history used chop_str($co{'title'}, 50)
4879                 print format_subject_html($co{'title'}, $co{'title_short'},
4880                                           href(action=>"commit", hash=>$commit), $ref);
4881                 print "</td>\n" .
4882                       "<td class=\"link\">" .
4883                       $cgi->a({-href => href(action=>$ftype, hash_base=>$commit, file_name=>$file_name)}, $ftype) . " | " .
4884                       $cgi->a({-href => href(action=>"commitdiff", hash=>$commit)}, "commitdiff");
4885
4886                 if ($ftype eq 'blob') {
4887                         my $blob_current = $file_hash;
4888                         my $blob_parent  = git_get_hash_by_path($commit, $file_name);
4889                         if (defined $blob_current && defined $blob_parent &&
4890                                         $blob_current ne $blob_parent) {
4891                                 print " | " .
4892                                         $cgi->a({-href => href(action=>"blobdiff",
4893                                                                hash=>$blob_current, hash_parent=>$blob_parent,
4894                                                                hash_base=>$hash_base, hash_parent_base=>$commit,
4895                                                                file_name=>$file_name)},
4896                                                 "diff to current");
4897                         }
4898                 }
4899                 print "</td>\n" .
4900                       "</tr>\n";
4901         }
4902         if (defined $extra) {
4903                 print "<tr>\n" .
4904                       "<td colspan=\"4\">$extra</td>\n" .
4905                       "</tr>\n";
4906         }
4907         print "</table>\n";
4908 }
4909
4910 sub git_tags_body {
4911         # uses global variable $project
4912         my ($taglist, $from, $to, $extra) = @_;
4913         $from = 0 unless defined $from;
4914         $to = $#{$taglist} if (!defined $to || $#{$taglist} < $to);
4915
4916         print "<table class=\"tags\">\n";
4917         my $alternate = 1;
4918         for (my $i = $from; $i <= $to; $i++) {
4919                 my $entry = $taglist->[$i];
4920                 my %tag = %$entry;
4921                 my $comment = $tag{'subject'};
4922                 my $comment_short;
4923                 if (defined $comment) {
4924                         $comment_short = chop_str($comment, 30, 5);
4925                 }
4926                 if ($alternate) {
4927                         print "<tr class=\"dark\">\n";
4928                 } else {
4929                         print "<tr class=\"light\">\n";
4930                 }
4931                 $alternate ^= 1;
4932                 if (defined $tag{'age'}) {
4933                         print "<td><i>$tag{'age'}</i></td>\n";
4934                 } else {
4935                         print "<td></td>\n";
4936                 }
4937                 print "<td>" .
4938                       $cgi->a({-href => href(action=>$tag{'reftype'}, hash=>$tag{'refid'}),
4939                                -class => "list name"}, esc_html($tag{'name'})) .
4940                       "</td>\n" .
4941                       "<td>";
4942                 if (defined $comment) {
4943                         print format_subject_html($comment, $comment_short,
4944                                                   href(action=>"tag", hash=>$tag{'id'}));
4945                 }
4946                 print "</td>\n" .
4947                       "<td class=\"selflink\">";
4948                 if ($tag{'type'} eq "tag") {
4949                         print $cgi->a({-href => href(action=>"tag", hash=>$tag{'id'})}, "tag");
4950                 } else {
4951                         print "&nbsp;";
4952                 }
4953                 print "</td>\n" .
4954                       "<td class=\"link\">" . " | " .
4955                       $cgi->a({-href => href(action=>$tag{'reftype'}, hash=>$tag{'refid'})}, $tag{'reftype'});
4956                 if ($tag{'reftype'} eq "commit") {
4957                         print " | " . $cgi->a({-href => href(action=>"shortlog", hash=>$tag{'fullname'})}, "shortlog") .
4958                               " | " . $cgi->a({-href => href(action=>"log", hash=>$tag{'fullname'})}, "log");
4959                 } elsif ($tag{'reftype'} eq "blob") {
4960                         print " | " . $cgi->a({-href => href(action=>"blob_plain", hash=>$tag{'refid'})}, "raw");
4961                 }
4962                 print "</td>\n" .
4963                       "</tr>";
4964         }
4965         if (defined $extra) {
4966                 print "<tr>\n" .
4967                       "<td colspan=\"5\">$extra</td>\n" .
4968                       "</tr>\n";
4969         }
4970         print "</table>\n";
4971 }
4972
4973 sub git_heads_body {
4974         # uses global variable $project
4975         my ($headlist, $head, $from, $to, $extra) = @_;
4976         $from = 0 unless defined $from;
4977         $to = $#{$headlist} if (!defined $to || $#{$headlist} < $to);
4978
4979         print "<table class=\"heads\">\n";
4980         my $alternate = 1;
4981         for (my $i = $from; $i <= $to; $i++) {
4982                 my $entry = $headlist->[$i];
4983                 my %ref = %$entry;
4984                 my $curr = $ref{'id'} eq $head;
4985                 if ($alternate) {
4986                         print "<tr class=\"dark\">\n";
4987                 } else {
4988                         print "<tr class=\"light\">\n";
4989                 }
4990                 $alternate ^= 1;
4991                 print "<td><i>$ref{'age'}</i></td>\n" .
4992                       ($curr ? "<td class=\"current_head\">" : "<td>") .
4993                       $cgi->a({-href => href(action=>"shortlog", hash=>$ref{'fullname'}),
4994                                -class => "list name"},esc_html($ref{'name'})) .
4995                       "</td>\n" .
4996                       "<td class=\"link\">" .
4997                       $cgi->a({-href => href(action=>"shortlog", hash=>$ref{'fullname'})}, "shortlog") . " | " .
4998                       $cgi->a({-href => href(action=>"log", hash=>$ref{'fullname'})}, "log") . " | " .
4999                       $cgi->a({-href => href(action=>"tree", hash=>$ref{'fullname'}, hash_base=>$ref{'fullname'})}, "tree") .
5000                       "</td>\n" .
5001                       "</tr>";
5002         }
5003         if (defined $extra) {
5004                 print "<tr>\n" .
5005                       "<td colspan=\"3\">$extra</td>\n" .
5006                       "</tr>\n";
5007         }
5008         print "</table>\n";
5009 }
5010
5011 sub git_search_grep_body {
5012         my ($commitlist, $from, $to, $extra) = @_;
5013         $from = 0 unless defined $from;
5014         $to = $#{$commitlist} if (!defined $to || $#{$commitlist} < $to);
5015
5016         print "<table class=\"commit_search\">\n";
5017         my $alternate = 1;
5018         for (my $i = $from; $i <= $to; $i++) {
5019                 my %co = %{$commitlist->[$i]};
5020                 if (!%co) {
5021                         next;
5022                 }
5023                 my $commit = $co{'id'};
5024                 if ($alternate) {
5025                         print "<tr class=\"dark\">\n";
5026                 } else {
5027                         print "<tr class=\"light\">\n";
5028                 }
5029                 $alternate ^= 1;
5030                 print "<td title=\"$co{'age_string_age'}\"><i>$co{'age_string_date'}</i></td>\n" .
5031                       format_author_html('td', \%co, 15, 5) .
5032                       "<td>" .
5033                       $cgi->a({-href => href(action=>"commit", hash=>$co{'id'}),
5034                                -class => "list subject"},
5035                               chop_and_escape_str($co{'title'}, 50) . "<br/>");
5036                 my $comment = $co{'comment'};
5037                 foreach my $line (@$comment) {
5038                         if ($line =~ m/^(.*?)($search_regexp)(.*)$/i) {
5039                                 my ($lead, $match, $trail) = ($1, $2, $3);
5040                                 $match = chop_str($match, 70, 5, 'center');
5041                                 my $contextlen = int((80 - length($match))/2);
5042                                 $contextlen = 30 if ($contextlen > 30);
5043                                 $lead  = chop_str($lead,  $contextlen, 10, 'left');
5044                                 $trail = chop_str($trail, $contextlen, 10, 'right');
5045
5046                                 $lead  = esc_html($lead);
5047                                 $match = esc_html($match);
5048                                 $trail = esc_html($trail);
5049
5050                                 print "$lead<span class=\"match\">$match</span>$trail<br />";
5051                         }
5052                 }
5053                 print "</td>\n" .
5054                       "<td class=\"link\">" .
5055                       $cgi->a({-href => href(action=>"commit", hash=>$co{'id'})}, "commit") .
5056                       " | " .
5057                       $cgi->a({-href => href(action=>"commitdiff", hash=>$co{'id'})}, "commitdiff") .
5058                       " | " .
5059                       $cgi->a({-href => href(action=>"tree", hash=>$co{'tree'}, hash_base=>$co{'id'})}, "tree");
5060                 print "</td>\n" .
5061                       "</tr>\n";
5062         }
5063         if (defined $extra) {
5064                 print "<tr>\n" .
5065                       "<td colspan=\"3\">$extra</td>\n" .
5066                       "</tr>\n";
5067         }
5068         print "</table>\n";
5069 }
5070
5071 ## ======================================================================
5072 ## ======================================================================
5073 ## actions
5074
5075 sub git_project_list {
5076         my $order = $input_params{'order'};
5077         if (defined $order && $order !~ m/none|project|descr|owner|age/) {
5078                 die_error(400, "Unknown order parameter");
5079         }
5080
5081         my @list = git_get_projects_list();
5082         if (!@list) {
5083                 die_error(404, "No projects found");
5084         }
5085
5086         git_header_html();
5087         if (defined $home_text && -f $home_text) {
5088                 print "<div class=\"index_include\">\n";
5089                 insert_file($home_text);
5090                 print "</div>\n";
5091         }
5092         print $cgi->startform(-method => "get") .
5093               "<p class=\"projsearch\">Search:\n" .
5094               $cgi->textfield(-name => "s", -value => $searchtext) . "\n" .
5095               "</p>" .
5096               $cgi->end_form() . "\n";
5097         git_project_list_body(\@list, $order);
5098         git_footer_html();
5099 }
5100
5101 sub git_forks {
5102         my $order = $input_params{'order'};
5103         if (defined $order && $order !~ m/none|project|descr|owner|age/) {
5104                 die_error(400, "Unknown order parameter");
5105         }
5106
5107         my @list = git_get_projects_list($project);
5108         if (!@list) {
5109                 die_error(404, "No forks found");
5110         }
5111
5112         git_header_html();
5113         git_print_page_nav('','');
5114         git_print_header_div('summary', "$project forks");
5115         git_project_list_body(\@list, $order);
5116         git_footer_html();
5117 }
5118
5119 sub git_project_index {
5120         my @projects = git_get_projects_list($project);
5121
5122         print $cgi->header(
5123                 -type => 'text/plain',
5124                 -charset => 'utf-8',
5125                 -content_disposition => 'inline; filename="index.aux"');
5126
5127         foreach my $pr (@projects) {
5128                 if (!exists $pr->{'owner'}) {
5129                         $pr->{'owner'} = git_get_project_owner("$pr->{'path'}");
5130                 }
5131
5132                 my ($path, $owner) = ($pr->{'path'}, $pr->{'owner'});
5133                 # quote as in CGI::Util::encode, but keep the slash, and use '+' for ' '
5134                 $path  =~ s/([^a-zA-Z0-9_.\-\/ ])/sprintf("%%%02X", ord($1))/eg;
5135                 $owner =~ s/([^a-zA-Z0-9_.\-\/ ])/sprintf("%%%02X", ord($1))/eg;
5136                 $path  =~ s/ /\+/g;
5137                 $owner =~ s/ /\+/g;
5138
5139                 print "$path $owner\n";
5140         }
5141 }
5142
5143 sub git_summary {
5144         my $descr = git_get_project_description($project) || "none";
5145         my %co = parse_commit("HEAD");
5146         my %cd = %co ? parse_date($co{'committer_epoch'}, $co{'committer_tz'}) : ();
5147         my $head = $co{'id'};
5148         my $remote_heads = gitweb_check_feature('remote_heads');
5149
5150         my $owner = git_get_project_owner($project);
5151
5152         my $refs = git_get_references();
5153         # These get_*_list functions return one more to allow us to see if
5154         # there are more ...
5155         my @taglist  = git_get_tags_list(16);
5156         my @headlist = git_get_heads_list(16);
5157         my @remotelist = $remote_heads ? git_get_heads_list(16, 'remotes') : ();
5158         my @forklist;
5159         my $check_forks = gitweb_check_feature('forks');
5160
5161         if ($check_forks) {
5162                 @forklist = git_get_projects_list($project);
5163         }
5164
5165         git_header_html();
5166         git_print_page_nav('summary','', $head);
5167
5168         print "<div class=\"title\">&nbsp;</div>\n";
5169         print "<table class=\"projects_list\">\n" .
5170               "<tr id=\"metadata_desc\"><td>description</td><td>" . esc_html($descr) . "</td></tr>\n" .
5171               "<tr id=\"metadata_owner\"><td>owner</td><td>" . esc_html($owner) . "</td></tr>\n";
5172         if (defined $cd{'rfc2822'}) {
5173                 print "<tr id=\"metadata_lchange\"><td>last change</td><td>$cd{'rfc2822'}</td></tr>\n";
5174         }
5175
5176         # use per project git URL list in $projectroot/$project/cloneurl
5177         # or make project git URL from git base URL and project name
5178         my $url_tag = "URL";
5179         my @url_list = git_get_project_url_list($project);
5180         @url_list = map { "$_/$project" } @git_base_url_list unless @url_list;
5181         foreach my $git_url (@url_list) {
5182                 next unless $git_url;
5183                 print "<tr class=\"metadata_url\"><td>$url_tag</td><td>$git_url</td></tr>\n";
5184                 $url_tag = "";
5185         }
5186
5187         # Tag cloud
5188         my $show_ctags = gitweb_check_feature('ctags');
5189         if ($show_ctags) {
5190                 my $ctags = git_get_project_ctags($project);
5191                 my $cloud = git_populate_project_tagcloud($ctags);
5192                 print "<tr id=\"metadata_ctags\"><td>Content tags:<br />";
5193                 print "</td>\n<td>" unless %$ctags;
5194                 print "<form action=\"$show_ctags\" method=\"post\"><input type=\"hidden\" name=\"p\" value=\"$project\" />Add: <input type=\"text\" name=\"t\" size=\"8\" /></form>";
5195                 print "</td>\n<td>" if %$ctags;
5196                 print git_show_project_tagcloud($cloud, 48);
5197                 print "</td></tr>";
5198         }
5199
5200         print "</table>\n";
5201
5202         # If XSS prevention is on, we don't include README.html.
5203         # TODO: Allow a readme in some safe format.
5204         if (!$prevent_xss && -s "$projectroot/$project/README.html") {
5205                 print "<div class=\"title\">readme</div>\n" .
5206                       "<div class=\"readme\">\n";
5207                 insert_file("$projectroot/$project/README.html");
5208                 print "\n</div>\n"; # class="readme"
5209         }
5210
5211         # we need to request one more than 16 (0..15) to check if
5212         # those 16 are all
5213         my @commitlist = $head ? parse_commits($head, 17) : ();
5214         if (@commitlist) {
5215                 git_print_header_div('shortlog');
5216                 git_shortlog_body(\@commitlist, 0, 15, $refs,
5217                                   $#commitlist <=  15 ? undef :
5218                                   $cgi->a({-href => href(action=>"shortlog")}, "..."));
5219         }
5220
5221         if (@taglist) {
5222                 git_print_header_div('tags');
5223                 git_tags_body(\@taglist, 0, 15,
5224                               $#taglist <=  15 ? undef :
5225                               $cgi->a({-href => href(action=>"tags")}, "..."));
5226         }
5227
5228         if (@headlist) {
5229                 git_print_header_div('heads');
5230                 git_heads_body(\@headlist, $head, 0, 15,
5231                                $#headlist <= 15 ? undef :
5232                                $cgi->a({-href => href(action=>"heads")}, "..."));
5233         }
5234
5235         if (@remotelist) {
5236                 git_print_header_div('remotes');
5237                 git_heads_body(\@remotelist, $head, 0, 15,
5238                                $#remotelist <= 15 ? undef :
5239                                $cgi->a({-href => href(action=>"remotes")}, "..."));
5240         }
5241
5242         if (@forklist) {
5243                 git_print_header_div('forks');
5244                 git_project_list_body(\@forklist, 'age', 0, 15,
5245                                       $#forklist <= 15 ? undef :
5246                                       $cgi->a({-href => href(action=>"forks")}, "..."),
5247                                       'no_header');
5248         }
5249
5250         git_footer_html();
5251 }
5252
5253 sub git_tag {
5254         my %tag = parse_tag($hash);
5255
5256         if (! %tag) {
5257                 die_error(404, "Unknown tag object");
5258         }
5259
5260         my $head = git_get_head_hash($project);
5261         git_header_html();
5262         git_print_page_nav('','', $head,undef,$head);
5263         git_print_header_div('commit', esc_html($tag{'name'}), $hash);
5264         print "<div class=\"title_text\">\n" .
5265               "<table class=\"object_header\">\n" .
5266               "<tr>\n" .
5267               "<td>object</td>\n" .
5268               "<td>" . $cgi->a({-class => "list", -href => href(action=>$tag{'type'}, hash=>$tag{'object'})},
5269                                $tag{'object'}) . "</td>\n" .
5270               "<td class=\"link\">" . $cgi->a({-href => href(action=>$tag{'type'}, hash=>$tag{'object'})},
5271                                               $tag{'type'}) . "</td>\n" .
5272               "</tr>\n";
5273         if (defined($tag{'author'})) {
5274                 git_print_authorship_rows(\%tag, 'author');
5275         }
5276         print "</table>\n\n" .
5277               "</div>\n";
5278         print "<div class=\"page_body\">";
5279         my $comment = $tag{'comment'};
5280         foreach my $line (@$comment) {
5281                 chomp $line;
5282                 print esc_html($line, -nbsp=>1) . "<br/>\n";
5283         }
5284         print "</div>\n";
5285         git_footer_html();
5286 }
5287
5288 sub git_blame_common {
5289         my $format = shift || 'porcelain';
5290         if ($format eq 'porcelain' && $cgi->param('js')) {
5291                 $format = 'incremental';
5292                 $action = 'blame_incremental'; # for page title etc
5293         }
5294
5295         # permissions
5296         gitweb_check_feature('blame')
5297                 or die_error(403, "Blame view not allowed");
5298
5299         # error checking
5300         die_error(400, "No file name given") unless $file_name;
5301         $hash_base ||= git_get_head_hash($project);
5302         die_error(404, "Couldn't find base commit") unless $hash_base;
5303         my %co = parse_commit($hash_base)
5304                 or die_error(404, "Commit not found");
5305         my $ftype = "blob";
5306         if (!defined $hash) {
5307                 $hash = git_get_hash_by_path($hash_base, $file_name, "blob")
5308                         or die_error(404, "Error looking up file");
5309         } else {
5310                 $ftype = git_get_type($hash);
5311                 if ($ftype !~ "blob") {
5312                         die_error(400, "Object is not a blob");
5313                 }
5314         }
5315
5316         my $fd;
5317         if ($format eq 'incremental') {
5318                 # get file contents (as base)
5319                 open $fd, "-|", git_cmd(), 'cat-file', 'blob', $hash
5320                         or die_error(500, "Open git-cat-file failed");
5321         } elsif ($format eq 'data') {
5322                 # run git-blame --incremental
5323                 open $fd, "-|", git_cmd(), "blame", "--incremental",
5324                         $hash_base, "--", $file_name
5325                         or die_error(500, "Open git-blame --incremental failed");
5326         } else {
5327                 # run git-blame --porcelain
5328                 open $fd, "-|", git_cmd(), "blame", '-p',
5329                         $hash_base, '--', $file_name
5330                         or die_error(500, "Open git-blame --porcelain failed");
5331         }
5332
5333         # incremental blame data returns early
5334         if ($format eq 'data') {
5335                 print $cgi->header(
5336                         -type=>"text/plain", -charset => "utf-8",
5337                         -status=> "200 OK");
5338                 local $| = 1; # output autoflush
5339                 print while <$fd>;
5340                 close $fd
5341                         or print "ERROR $!\n";
5342
5343                 print 'END';
5344                 if (defined $t0 && gitweb_check_feature('timed')) {
5345                         print ' '.
5346                               Time::HiRes::tv_interval($t0, [Time::HiRes::gettimeofday()]).
5347                               ' '.$number_of_git_cmds;
5348                 }
5349                 print "\n";
5350
5351                 return;
5352         }
5353
5354         # page header
5355         git_header_html();
5356         my $formats_nav =
5357                 $cgi->a({-href => href(action=>"blob", -replay=>1)},
5358                         "blob") .
5359                 " | ";
5360         if ($format eq 'incremental') {
5361                 $formats_nav .=
5362                         $cgi->a({-href => href(action=>"blame", javascript=>0, -replay=>1)},
5363                                 "blame") . " (non-incremental)";
5364         } else {
5365                 $formats_nav .=
5366                         $cgi->a({-href => href(action=>"blame_incremental", -replay=>1)},
5367                                 "blame") . " (incremental)";
5368         }
5369         $formats_nav .=
5370                 " | " .
5371                 $cgi->a({-href => href(action=>"history", -replay=>1)},
5372                         "history") .
5373                 " | " .
5374                 $cgi->a({-href => href(action=>$action, file_name=>$file_name)},
5375                         "HEAD");
5376         git_print_page_nav('','', $hash_base,$co{'tree'},$hash_base, $formats_nav);
5377         git_print_header_div('commit', esc_html($co{'title'}), $hash_base);
5378         git_print_page_path($file_name, $ftype, $hash_base);
5379
5380         # page body
5381         if ($format eq 'incremental') {
5382                 print "<noscript>\n<div class=\"error\"><center><b>\n".
5383                       "This page requires JavaScript to run.\n Use ".
5384                       $cgi->a({-href => href(action=>'blame',javascript=>0,-replay=>1)},
5385                               'this page').
5386                       " instead.\n".
5387                       "</b></center></div>\n</noscript>\n";
5388
5389                 print qq!<div id="progress_bar" style="width: 100%; background-color: yellow"></div>\n!;
5390         }
5391
5392         print qq!<div class="page_body">\n!;
5393         print qq!<div id="progress_info">... / ...</div>\n!
5394                 if ($format eq 'incremental');
5395         print qq!<table id="blame_table" class="blame" width="100%">\n!.
5396               #qq!<col width="5.5em" /><col width="2.5em" /><col width="*" />\n!.
5397               qq!<thead>\n!.
5398               qq!<tr><th>Commit</th><th>Line</th><th>Data</th></tr>\n!.
5399               qq!</thead>\n!.
5400               qq!<tbody>\n!;
5401
5402         my @rev_color = qw(light dark);
5403         my $num_colors = scalar(@rev_color);
5404         my $current_color = 0;
5405
5406         if ($format eq 'incremental') {
5407                 my $color_class = $rev_color[$current_color];
5408
5409                 #contents of a file
5410                 my $linenr = 0;
5411         LINE:
5412                 while (my $line = <$fd>) {
5413                         chomp $line;
5414                         $linenr++;
5415
5416                         print qq!<tr id="l$linenr" class="$color_class">!.
5417                               qq!<td class="sha1"><a href=""> </a></td>!.
5418                               qq!<td class="linenr">!.
5419                               qq!<a class="linenr" href="">$linenr</a></td>!;
5420                         print qq!<td class="pre">! . esc_html($line) . "</td>\n";
5421                         print qq!</tr>\n!;
5422                 }
5423
5424         } else { # porcelain, i.e. ordinary blame
5425                 my %metainfo = (); # saves information about commits
5426
5427                 # blame data
5428         LINE:
5429                 while (my $line = <$fd>) {
5430                         chomp $line;
5431                         # the header: <SHA-1> <src lineno> <dst lineno> [<lines in group>]
5432                         # no <lines in group> for subsequent lines in group of lines
5433                         my ($full_rev, $orig_lineno, $lineno, $group_size) =
5434                            ($line =~ /^([0-9a-f]{40}) (\d+) (\d+)(?: (\d+))?$/);
5435                         if (!exists $metainfo{$full_rev}) {
5436                                 $metainfo{$full_rev} = { 'nprevious' => 0 };
5437                         }
5438                         my $meta = $metainfo{$full_rev};
5439                         my $data;
5440                         while ($data = <$fd>) {
5441                                 chomp $data;
5442                                 last if ($data =~ s/^\t//); # contents of line
5443                                 if ($data =~ /^(\S+)(?: (.*))?$/) {
5444                                         $meta->{$1} = $2 unless exists $meta->{$1};
5445                                 }
5446                                 if ($data =~ /^previous /) {
5447                                         $meta->{'nprevious'}++;
5448                                 }
5449                         }
5450                         my $short_rev = substr($full_rev, 0, 8);
5451                         my $author = $meta->{'author'};
5452                         my %date =
5453                                 parse_date($meta->{'author-time'}, $meta->{'author-tz'});
5454                         my $date = $date{'iso-tz'};
5455                         if ($group_size) {
5456                                 $current_color = ($current_color + 1) % $num_colors;
5457                         }
5458                         my $tr_class = $rev_color[$current_color];
5459                         $tr_class .= ' boundary' if (exists $meta->{'boundary'});
5460                         $tr_class .= ' no-previous' if ($meta->{'nprevious'} == 0);
5461                         $tr_class .= ' multiple-previous' if ($meta->{'nprevious'} > 1);
5462                         print "<tr id=\"l$lineno\" class=\"$tr_class\">\n";
5463                         if ($group_size) {
5464                                 print "<td class=\"sha1\"";
5465                                 print " title=\"". esc_html($author) . ", $date\"";
5466                                 print " rowspan=\"$group_size\"" if ($group_size > 1);
5467                                 print ">";
5468                                 print $cgi->a({-href => href(action=>"commit",
5469                                                              hash=>$full_rev,
5470                                                              file_name=>$file_name)},
5471                                               esc_html($short_rev));
5472                                 if ($group_size >= 2) {
5473                                         my @author_initials = ($author =~ /\b([[:upper:]])\B/g);
5474                                         if (@author_initials) {
5475                                                 print "<br />" .
5476                                                       esc_html(join('', @author_initials));
5477                                                 #           or join('.', ...)
5478                                         }
5479                                 }
5480                                 print "</td>\n";
5481                         }
5482                         # 'previous' <sha1 of parent commit> <filename at commit>
5483                         if (exists $meta->{'previous'} &&
5484                             $meta->{'previous'} =~ /^([a-fA-F0-9]{40}) (.*)$/) {
5485                                 $meta->{'parent'} = $1;
5486                                 $meta->{'file_parent'} = unquote($2);
5487                         }
5488                         my $linenr_commit =
5489                                 exists($meta->{'parent'}) ?
5490                                 $meta->{'parent'} : $full_rev;
5491                         my $linenr_filename =
5492                                 exists($meta->{'file_parent'}) ?
5493                                 $meta->{'file_parent'} : unquote($meta->{'filename'});
5494                         my $blamed = href(action => 'blame',
5495                                           file_name => $linenr_filename,
5496                                           hash_base => $linenr_commit);
5497                         print "<td class=\"linenr\">";
5498                         print $cgi->a({ -href => "$blamed#l$orig_lineno",
5499                                         -class => "linenr" },
5500                                       esc_html($lineno));
5501                         print "</td>";
5502                         print "<td class=\"pre\">" . esc_html($data) . "</td>\n";
5503                         print "</tr>\n";
5504                 } # end while
5505
5506         }
5507
5508         # footer
5509         print "</tbody>\n".
5510               "</table>\n"; # class="blame"
5511         print "</div>\n";   # class="blame_body"
5512         close $fd
5513                 or print "Reading blob failed\n";
5514
5515         git_footer_html();
5516 }
5517
5518 sub git_blame {
5519         git_blame_common();
5520 }
5521
5522 sub git_blame_incremental {
5523         git_blame_common('incremental');
5524 }
5525
5526 sub git_blame_data {
5527         git_blame_common('data');
5528 }
5529
5530 sub git_tags {
5531         my $head = git_get_head_hash($project);
5532         git_header_html();
5533         git_print_page_nav('','', $head,undef,$head,format_ref_views('tags'));
5534         git_print_header_div('summary', $project);
5535
5536         my @tagslist = git_get_tags_list();
5537         if (@tagslist) {
5538                 git_tags_body(\@tagslist);
5539         }
5540         git_footer_html();
5541 }
5542
5543 sub git_heads {
5544         my $head = git_get_head_hash($project);
5545         git_header_html();
5546         git_print_page_nav('','', $head,undef,$head,format_ref_views('heads'));
5547         git_print_header_div('summary', $project);
5548
5549         my @headslist = git_get_heads_list();
5550         if (@headslist) {
5551                 git_heads_body(\@headslist, $head);
5552         }
5553         git_footer_html();
5554 }
5555
5556 sub git_remotes {
5557         gitweb_check_feature('remote_heads')
5558                 or die_error(403, "Remote heads view is disabled");
5559
5560         my $head = git_get_head_hash($project);
5561         git_header_html();
5562         git_print_page_nav('','', $head,undef,$head,format_ref_views('remotes'));
5563         git_print_header_div('summary', $project);
5564
5565         my @remotelist = git_get_heads_list(undef, 'remotes');
5566         if (@remotelist) {
5567                 git_heads_body(\@remotelist, $head);
5568         }
5569         git_footer_html();
5570 }
5571
5572 sub git_blob_plain {
5573         my $type = shift;
5574         my $expires;
5575
5576         if (!defined $hash) {
5577                 if (defined $file_name) {
5578                         my $base = $hash_base || git_get_head_hash($project);
5579                         $hash = git_get_hash_by_path($base, $file_name, "blob")
5580                                 or die_error(404, "Cannot find file");
5581                 } else {
5582                         die_error(400, "No file name defined");
5583                 }
5584         } elsif ($hash =~ m/^[0-9a-fA-F]{40}$/) {
5585                 # blobs defined by non-textual hash id's can be cached
5586                 $expires = "+1d";
5587         }
5588
5589         open my $fd, "-|", git_cmd(), "cat-file", "blob", $hash
5590                 or die_error(500, "Open git-cat-file blob '$hash' failed");
5591
5592         # content-type (can include charset)
5593         $type = blob_contenttype($fd, $file_name, $type);
5594
5595         # "save as" filename, even when no $file_name is given
5596         my $save_as = "$hash";
5597         if (defined $file_name) {
5598                 $save_as = $file_name;
5599         } elsif ($type =~ m/^text\//) {
5600                 $save_as .= '.txt';
5601         }
5602
5603         # With XSS prevention on, blobs of all types except a few known safe
5604         # ones are served with "Content-Disposition: attachment" to make sure
5605         # they don't run in our security domain.  For certain image types,
5606         # blob view writes an <img> tag referring to blob_plain view, and we
5607         # want to be sure not to break that by serving the image as an
5608         # attachment (though Firefox 3 doesn't seem to care).
5609         my $sandbox = $prevent_xss &&
5610                 $type !~ m!^(?:text/plain|image/(?:gif|png|jpeg))$!;
5611
5612         print $cgi->header(
5613                 -type => $type,
5614                 -expires => $expires,
5615                 -content_disposition =>
5616                         ($sandbox ? 'attachment' : 'inline')
5617                         . '; filename="' . $save_as . '"');
5618         local $/ = undef;
5619         binmode STDOUT, ':raw';
5620         print <$fd>;
5621         binmode STDOUT, ':utf8'; # as set at the beginning of gitweb.cgi
5622         close $fd;
5623 }
5624
5625 sub git_blob {
5626         my $expires;
5627
5628         if (!defined $hash) {
5629                 if (defined $file_name) {
5630                         my $base = $hash_base || git_get_head_hash($project);
5631                         $hash = git_get_hash_by_path($base, $file_name, "blob")
5632                                 or die_error(404, "Cannot find file");
5633                 } else {
5634                         die_error(400, "No file name defined");
5635                 }
5636         } elsif ($hash =~ m/^[0-9a-fA-F]{40}$/) {
5637                 # blobs defined by non-textual hash id's can be cached
5638                 $expires = "+1d";
5639         }
5640
5641         my $have_blame = gitweb_check_feature('blame');
5642         open my $fd, "-|", git_cmd(), "cat-file", "blob", $hash
5643                 or die_error(500, "Couldn't cat $file_name, $hash");
5644         my $mimetype = blob_mimetype($fd, $file_name);
5645         # use 'blob_plain' (aka 'raw') view for files that cannot be displayed
5646         if ($mimetype !~ m!^(?:text/|image/(?:gif|png|jpeg)$)! && -B $fd) {
5647                 close $fd;
5648                 return git_blob_plain($mimetype);
5649         }
5650         # we can have blame only for text/* mimetype
5651         $have_blame &&= ($mimetype =~ m!^text/!);
5652
5653         my $highlight = gitweb_check_feature('highlight');
5654         my $syntax = guess_file_syntax($highlight, $mimetype, $file_name);
5655         $fd = run_highlighter($fd, $highlight, $syntax)
5656                 if $syntax;
5657
5658         git_header_html(undef, $expires);
5659         my $formats_nav = '';
5660         if (defined $hash_base && (my %co = parse_commit($hash_base))) {
5661                 if (defined $file_name) {
5662                         if ($have_blame) {
5663                                 $formats_nav .=
5664                                         $cgi->a({-href => href(action=>"blame", -replay=>1)},
5665                                                 "blame") .
5666                                         " | ";
5667                         }
5668                         $formats_nav .=
5669                                 $cgi->a({-href => href(action=>"history", -replay=>1)},
5670                                         "history") .
5671                                 " | " .
5672                                 $cgi->a({-href => href(action=>"blob_plain", -replay=>1)},
5673                                         "raw") .
5674                                 " | " .
5675                                 $cgi->a({-href => href(action=>"blob",
5676                                                        hash_base=>"HEAD", file_name=>$file_name)},
5677                                         "HEAD");
5678                 } else {
5679                         $formats_nav .=
5680                                 $cgi->a({-href => href(action=>"blob_plain", -replay=>1)},
5681                                         "raw");
5682                 }
5683                 git_print_page_nav('','', $hash_base,$co{'tree'},$hash_base, $formats_nav);
5684                 git_print_header_div('commit', esc_html($co{'title'}), $hash_base);
5685         } else {
5686                 print "<div class=\"page_nav\">\n" .
5687                       "<br/><br/></div>\n" .
5688                       "<div class=\"title\">$hash</div>\n";
5689         }
5690         git_print_page_path($file_name, "blob", $hash_base);
5691         print "<div class=\"page_body\">\n";
5692         if ($mimetype =~ m!^image/!) {
5693                 print qq!<img type="$mimetype"!;
5694                 if ($file_name) {
5695                         print qq! alt="$file_name" title="$file_name"!;
5696                 }
5697                 print qq! src="! .
5698                       href(action=>"blob_plain", hash=>$hash,
5699                            hash_base=>$hash_base, file_name=>$file_name) .
5700                       qq!" />\n!;
5701         } else {
5702                 my $nr;
5703                 while (my $line = <$fd>) {
5704                         chomp $line;
5705                         $nr++;
5706                         $line = untabify($line);
5707                         printf qq!<div class="pre"><a id="l%i" href="%s#l%i" class="linenr">%4i</a> %s</div>\n!,
5708                                $nr, href(-replay => 1), $nr, $nr, $syntax ? $line : esc_html($line, -nbsp=>1);
5709                 }
5710         }
5711         close $fd
5712                 or print "Reading blob failed.\n";
5713         print "</div>";
5714         git_footer_html();
5715 }
5716
5717 sub git_tree {
5718         if (!defined $hash_base) {
5719                 $hash_base = "HEAD";
5720         }
5721         if (!defined $hash) {
5722                 if (defined $file_name) {
5723                         $hash = git_get_hash_by_path($hash_base, $file_name, "tree");
5724                 } else {
5725                         $hash = $hash_base;
5726                 }
5727         }
5728         die_error(404, "No such tree") unless defined($hash);
5729
5730         my $show_sizes = gitweb_check_feature('show-sizes');
5731         my $have_blame = gitweb_check_feature('blame');
5732
5733         my @entries = ();
5734         {
5735                 local $/ = "\0";
5736                 open my $fd, "-|", git_cmd(), "ls-tree", '-z',
5737                         ($show_sizes ? '-l' : ()), @extra_options, $hash
5738                         or die_error(500, "Open git-ls-tree failed");
5739                 @entries = map { chomp; $_ } <$fd>;
5740                 close $fd
5741                         or die_error(404, "Reading tree failed");
5742         }
5743
5744         my $refs = git_get_references();
5745         my $ref = format_ref_marker($refs, $hash_base);
5746         git_header_html();
5747         my $basedir = '';
5748         if (defined $hash_base && (my %co = parse_commit($hash_base))) {
5749                 my @views_nav = ();
5750                 if (defined $file_name) {
5751                         push @views_nav,
5752                                 $cgi->a({-href => href(action=>"history", -replay=>1)},
5753                                         "history"),
5754                                 $cgi->a({-href => href(action=>"tree",
5755                                                        hash_base=>"HEAD", file_name=>$file_name)},
5756                                         "HEAD"),
5757                 }
5758                 my $snapshot_links = format_snapshot_links($hash);
5759                 if (defined $snapshot_links) {
5760                         # FIXME: Should be available when we have no hash base as well.
5761                         push @views_nav, $snapshot_links;
5762                 }
5763                 git_print_page_nav('tree','', $hash_base, undef, undef,
5764                                    join(' | ', @views_nav));
5765                 git_print_header_div('commit', esc_html($co{'title'}) . $ref, $hash_base);
5766         } else {
5767                 undef $hash_base;
5768                 print "<div class=\"page_nav\">\n";
5769                 print "<br/><br/></div>\n";
5770                 print "<div class=\"title\">$hash</div>\n";
5771         }
5772         if (defined $file_name) {
5773                 $basedir = $file_name;
5774                 if ($basedir ne '' && substr($basedir, -1) ne '/') {
5775                         $basedir .= '/';
5776                 }
5777                 git_print_page_path($file_name, 'tree', $hash_base);
5778         }
5779         print "<div class=\"page_body\">\n";
5780         print "<table class=\"tree\">\n";
5781         my $alternate = 1;
5782         # '..' (top directory) link if possible
5783         if (defined $hash_base &&
5784             defined $file_name && $file_name =~ m![^/]+$!) {
5785                 if ($alternate) {
5786                         print "<tr class=\"dark\">\n";
5787                 } else {
5788                         print "<tr class=\"light\">\n";
5789                 }
5790                 $alternate ^= 1;
5791
5792                 my $up = $file_name;
5793                 $up =~ s!/?[^/]+$!!;
5794                 undef $up unless $up;
5795                 # based on git_print_tree_entry
5796                 print '<td class="mode">' . mode_str('040000') . "</td>\n";
5797                 print '<td class="size">&nbsp;</td>'."\n" if $show_sizes;
5798                 print '<td class="list">';
5799                 print $cgi->a({-href => href(action=>"tree",
5800                                              hash_base=>$hash_base,
5801                                              file_name=>$up)},
5802                               "..");
5803                 print "</td>\n";
5804                 print "<td class=\"link\"></td>\n";
5805
5806                 print "</tr>\n";
5807         }
5808         foreach my $line (@entries) {
5809                 my %t = parse_ls_tree_line($line, -z => 1, -l => $show_sizes);
5810
5811                 if ($alternate) {
5812                         print "<tr class=\"dark\">\n";
5813                 } else {
5814                         print "<tr class=\"light\">\n";
5815                 }
5816                 $alternate ^= 1;
5817
5818                 git_print_tree_entry(\%t, $basedir, $hash_base, $have_blame);
5819
5820                 print "</tr>\n";
5821         }
5822         print "</table>\n" .
5823               "</div>";
5824         git_footer_html();
5825 }
5826
5827 sub snapshot_name {
5828         my ($project, $hash) = @_;
5829
5830         # path/to/project.git  -> project
5831         # path/to/project/.git -> project
5832         my $name = to_utf8($project);
5833         $name =~ s,([^/])/*\.git$,$1,;
5834         $name = basename($name);
5835         # sanitize name
5836         $name =~ s/[[:cntrl:]]/?/g;
5837
5838         my $ver = $hash;
5839         if ($hash =~ /^[0-9a-fA-F]+$/) {
5840                 # shorten SHA-1 hash
5841                 my $full_hash = git_get_full_hash($project, $hash);
5842                 if ($full_hash =~ /^$hash/ && length($hash) > 7) {
5843                         $ver = git_get_short_hash($project, $hash);
5844                 }
5845         } elsif ($hash =~ m!^refs/tags/(.*)$!) {
5846                 # tags don't need shortened SHA-1 hash
5847                 $ver = $1;
5848         } else {
5849                 # branches and other need shortened SHA-1 hash
5850                 if ($hash =~ m!^refs/(?:heads|remotes)/(.*)$!) {
5851                         $ver = $1;
5852                 }
5853                 $ver .= '-' . git_get_short_hash($project, $hash);
5854         }
5855         # in case of hierarchical branch names
5856         $ver =~ s!/!.!g;
5857
5858         # name = project-version_string
5859         $name = "$name-$ver";
5860
5861         return wantarray ? ($name, $name) : $name;
5862 }
5863
5864 sub git_snapshot {
5865         my $format = $input_params{'snapshot_format'};
5866         if (!@snapshot_fmts) {
5867                 die_error(403, "Snapshots not allowed");
5868         }
5869         # default to first supported snapshot format
5870         $format ||= $snapshot_fmts[0];
5871         if ($format !~ m/^[a-z0-9]+$/) {
5872                 die_error(400, "Invalid snapshot format parameter");
5873         } elsif (!exists($known_snapshot_formats{$format})) {
5874                 die_error(400, "Unknown snapshot format");
5875         } elsif ($known_snapshot_formats{$format}{'disabled'}) {
5876                 die_error(403, "Snapshot format not allowed");
5877         } elsif (!grep($_ eq $format, @snapshot_fmts)) {
5878                 die_error(403, "Unsupported snapshot format");
5879         }
5880
5881         my $type = git_get_type("$hash^{}");
5882         if (!$type) {
5883                 die_error(404, 'Object does not exist');
5884         }  elsif ($type eq 'blob') {
5885                 die_error(400, 'Object is not a tree-ish');
5886         }
5887
5888         my ($name, $prefix) = snapshot_name($project, $hash);
5889         my $filename = "$name$known_snapshot_formats{$format}{'suffix'}";
5890         my $cmd = quote_command(
5891                 git_cmd(), 'archive',
5892                 "--format=$known_snapshot_formats{$format}{'format'}",
5893                 "--prefix=$prefix/", $hash);
5894         if (exists $known_snapshot_formats{$format}{'compressor'}) {
5895                 $cmd .= ' | ' . quote_command(@{$known_snapshot_formats{$format}{'compressor'}});
5896         }
5897
5898         $filename =~ s/(["\\])/\\$1/g;
5899         print $cgi->header(
5900                 -type => $known_snapshot_formats{$format}{'type'},
5901                 -content_disposition => 'inline; filename="' . $filename . '"',
5902                 -status => '200 OK');
5903
5904         open my $fd, "-|", $cmd
5905                 or die_error(500, "Execute git-archive failed");
5906         binmode STDOUT, ':raw';
5907         print <$fd>;
5908         binmode STDOUT, ':utf8'; # as set at the beginning of gitweb.cgi
5909         close $fd;
5910 }
5911
5912 sub git_log_generic {
5913         my ($fmt_name, $body_subr, $base, $parent, $file_name, $file_hash) = @_;
5914
5915         my $head = git_get_head_hash($project);
5916         if (!defined $base) {
5917                 $base = $head;
5918         }
5919         if (!defined $page) {
5920                 $page = 0;
5921         }
5922         my $refs = git_get_references();
5923
5924         my $commit_hash = $base;
5925         if (defined $parent) {
5926                 $commit_hash = "$parent..$base";
5927         }
5928         my @commitlist =
5929                 parse_commits($commit_hash, 101, (100 * $page),
5930                               defined $file_name ? ($file_name, "--full-history") : ());
5931
5932         my $ftype;
5933         if (!defined $file_hash && defined $file_name) {
5934                 # some commits could have deleted file in question,
5935                 # and not have it in tree, but one of them has to have it
5936                 for (my $i = 0; $i < @commitlist; $i++) {
5937                         $file_hash = git_get_hash_by_path($commitlist[$i]{'id'}, $file_name);
5938                         last if defined $file_hash;
5939                 }
5940         }
5941         if (defined $file_hash) {
5942                 $ftype = git_get_type($file_hash);
5943         }
5944         if (defined $file_name && !defined $ftype) {
5945                 die_error(500, "Unknown type of object");
5946         }
5947         my %co;
5948         if (defined $file_name) {
5949                 %co = parse_commit($base)
5950                         or die_error(404, "Unknown commit object");
5951         }
5952
5953
5954         my $paging_nav = format_paging_nav($fmt_name, $page, $#commitlist >= 100);
5955         my $next_link = '';
5956         if ($#commitlist >= 100) {
5957                 $next_link =
5958                         $cgi->a({-href => href(-replay=>1, page=>$page+1),
5959                                  -accesskey => "n", -title => "Alt-n"}, "next");
5960         }
5961         my $patch_max = gitweb_get_feature('patches');
5962         if ($patch_max && !defined $file_name) {
5963                 if ($patch_max < 0 || @commitlist <= $patch_max) {
5964                         $paging_nav .= " &sdot; " .
5965                                 $cgi->a({-href => href(action=>"patches", -replay=>1)},
5966                                         "patches");
5967                 }
5968         }
5969
5970         git_header_html();
5971         git_print_page_nav($fmt_name,'', $hash,$hash,$hash, $paging_nav);
5972         if (defined $file_name) {
5973                 git_print_header_div('commit', esc_html($co{'title'}), $base);
5974         } else {
5975                 git_print_header_div('summary', $project)
5976         }
5977         git_print_page_path($file_name, $ftype, $hash_base)
5978                 if (defined $file_name);
5979
5980         $body_subr->(\@commitlist, 0, 99, $refs, $next_link,
5981                      $file_name, $file_hash, $ftype);
5982
5983         git_footer_html();
5984 }
5985
5986 sub git_log {
5987         git_log_generic('log', \&git_log_body,
5988                         $hash, $hash_parent);
5989 }
5990
5991 sub git_commit {
5992         $hash ||= $hash_base || "HEAD";
5993         my %co = parse_commit($hash)
5994             or die_error(404, "Unknown commit object");
5995
5996         my $parent  = $co{'parent'};
5997         my $parents = $co{'parents'}; # listref
5998
5999         # we need to prepare $formats_nav before any parameter munging
6000         my $formats_nav;
6001         if (!defined $parent) {
6002                 # --root commitdiff
6003                 $formats_nav .= '(initial)';
6004         } elsif (@$parents == 1) {
6005                 # single parent commit
6006                 $formats_nav .=
6007                         '(parent: ' .
6008                         $cgi->a({-href => href(action=>"commit",
6009                                                hash=>$parent)},
6010                                 esc_html(substr($parent, 0, 7))) .
6011                         ')';
6012         } else {
6013                 # merge commit
6014                 $formats_nav .=
6015                         '(merge: ' .
6016                         join(' ', map {
6017                                 $cgi->a({-href => href(action=>"commit",
6018                                                        hash=>$_)},
6019                                         esc_html(substr($_, 0, 7)));
6020                         } @$parents ) .
6021                         ')';
6022         }
6023         if (gitweb_check_feature('patches') && @$parents <= 1) {
6024                 $formats_nav .= " | " .
6025                         $cgi->a({-href => href(action=>"patch", -replay=>1)},
6026                                 "patch");
6027         }
6028
6029         if (!defined $parent) {
6030                 $parent = "--root";
6031         }
6032         my @difftree;
6033         open my $fd, "-|", git_cmd(), "diff-tree", '-r', "--no-commit-id",
6034                 @diff_opts,
6035                 (@$parents <= 1 ? $parent : '-c'),
6036                 $hash, "--"
6037                 or die_error(500, "Open git-diff-tree failed");
6038         @difftree = map { chomp; $_ } <$fd>;
6039         close $fd or die_error(404, "Reading git-diff-tree failed");
6040
6041         # non-textual hash id's can be cached
6042         my $expires;
6043         if ($hash =~ m/^[0-9a-fA-F]{40}$/) {
6044                 $expires = "+1d";
6045         }
6046         my $refs = git_get_references();
6047         my $ref = format_ref_marker($refs, $co{'id'});
6048
6049         git_header_html(undef, $expires);
6050         git_print_page_nav('commit', '',
6051                            $hash, $co{'tree'}, $hash,
6052                            $formats_nav);
6053
6054         if (defined $co{'parent'}) {
6055                 git_print_header_div('commitdiff', esc_html($co{'title'}) . $ref, $hash);
6056         } else {
6057                 git_print_header_div('tree', esc_html($co{'title'}) . $ref, $co{'tree'}, $hash);
6058         }
6059         print "<div class=\"title_text\">\n" .
6060               "<table class=\"object_header\">\n";
6061         git_print_authorship_rows(\%co);
6062         print "<tr><td>commit</td><td class=\"sha1\">$co{'id'}</td></tr>\n";
6063         print "<tr>" .
6064               "<td>tree</td>" .
6065               "<td class=\"sha1\">" .
6066               $cgi->a({-href => href(action=>"tree", hash=>$co{'tree'}, hash_base=>$hash),
6067                        class => "list"}, $co{'tree'}) .
6068               "</td>" .
6069               "<td class=\"link\">" .
6070               $cgi->a({-href => href(action=>"tree", hash=>$co{'tree'}, hash_base=>$hash)},
6071                       "tree");
6072         my $snapshot_links = format_snapshot_links($hash);
6073         if (defined $snapshot_links) {
6074                 print " | " . $snapshot_links;
6075         }
6076         print "</td>" .
6077               "</tr>\n";
6078
6079         foreach my $par (@$parents) {
6080                 print "<tr>" .
6081                       "<td>parent</td>" .
6082                       "<td class=\"sha1\">" .
6083                       $cgi->a({-href => href(action=>"commit", hash=>$par),
6084                                class => "list"}, $par) .
6085                       "</td>" .
6086                       "<td class=\"link\">" .
6087                       $cgi->a({-href => href(action=>"commit", hash=>$par)}, "commit") .
6088                       " | " .
6089                       $cgi->a({-href => href(action=>"commitdiff", hash=>$hash, hash_parent=>$par)}, "diff") .
6090                       "</td>" .
6091                       "</tr>\n";
6092         }
6093         print "</table>".
6094               "</div>\n";
6095
6096         print "<div class=\"page_body\">\n";
6097         git_print_log($co{'comment'});
6098         print "</div>\n";
6099
6100         git_difftree_body(\@difftree, $hash, @$parents);
6101
6102         git_footer_html();
6103 }
6104
6105 sub git_object {
6106         # object is defined by:
6107         # - hash or hash_base alone
6108         # - hash_base and file_name
6109         my $type;
6110
6111         # - hash or hash_base alone
6112         if ($hash || ($hash_base && !defined $file_name)) {
6113                 my $object_id = $hash || $hash_base;
6114
6115                 open my $fd, "-|", quote_command(
6116                         git_cmd(), 'cat-file', '-t', $object_id) . ' 2> /dev/null'
6117                         or die_error(404, "Object does not exist");
6118                 $type = <$fd>;
6119                 chomp $type;
6120                 close $fd
6121                         or die_error(404, "Object does not exist");
6122
6123         # - hash_base and file_name
6124         } elsif ($hash_base && defined $file_name) {
6125                 $file_name =~ s,/+$,,;
6126
6127                 system(git_cmd(), "cat-file", '-e', $hash_base) == 0
6128                         or die_error(404, "Base object does not exist");
6129
6130                 # here errors should not hapen
6131                 open my $fd, "-|", git_cmd(), "ls-tree", $hash_base, "--", $file_name
6132                         or die_error(500, "Open git-ls-tree failed");
6133                 my $line = <$fd>;
6134                 close $fd;
6135
6136                 #'100644 blob 0fa3f3a66fb6a137f6ec2c19351ed4d807070ffa  panic.c'
6137                 unless ($line && $line =~ m/^([0-9]+) (.+) ([0-9a-fA-F]{40})\t/) {
6138                         die_error(404, "File or directory for given base does not exist");
6139                 }
6140                 $type = $2;
6141                 $hash = $3;
6142         } else {
6143                 die_error(400, "Not enough information to find object");
6144         }
6145
6146         print $cgi->redirect(-uri => href(action=>$type, -full=>1,
6147                                           hash=>$hash, hash_base=>$hash_base,
6148                                           file_name=>$file_name),
6149                              -status => '302 Found');
6150 }
6151
6152 sub git_blobdiff {
6153         my $format = shift || 'html';
6154
6155         my $fd;
6156         my @difftree;
6157         my %diffinfo;
6158         my $expires;
6159
6160         # preparing $fd and %diffinfo for git_patchset_body
6161         # new style URI
6162         if (defined $hash_base && defined $hash_parent_base) {
6163                 if (defined $file_name) {
6164                         # read raw output
6165                         open $fd, "-|", git_cmd(), "diff-tree", '-r', @diff_opts,
6166                                 $hash_parent_base, $hash_base,
6167                                 "--", (defined $file_parent ? $file_parent : ()), $file_name
6168                                 or die_error(500, "Open git-diff-tree failed");
6169                         @difftree = map { chomp; $_ } <$fd>;
6170                         close $fd
6171                                 or die_error(404, "Reading git-diff-tree failed");
6172                         @difftree
6173                                 or die_error(404, "Blob diff not found");
6174
6175                 } elsif (defined $hash &&
6176                          $hash =~ /[0-9a-fA-F]{40}/) {
6177                         # try to find filename from $hash
6178
6179                         # read filtered raw output
6180                         open $fd, "-|", git_cmd(), "diff-tree", '-r', @diff_opts,
6181                                 $hash_parent_base, $hash_base, "--"
6182                                 or die_error(500, "Open git-diff-tree failed");
6183                         @difftree =
6184                                 # ':100644 100644 03b21826... 3b93d5e7... M     ls-files.c'
6185                                 # $hash == to_id
6186                                 grep { /^:[0-7]{6} [0-7]{6} [0-9a-fA-F]{40} $hash/ }
6187                                 map { chomp; $_ } <$fd>;
6188                         close $fd
6189                                 or die_error(404, "Reading git-diff-tree failed");
6190                         @difftree
6191                                 or die_error(404, "Blob diff not found");
6192
6193                 } else {
6194                         die_error(400, "Missing one of the blob diff parameters");
6195                 }
6196
6197                 if (@difftree > 1) {
6198                         die_error(400, "Ambiguous blob diff specification");
6199                 }
6200
6201                 %diffinfo = parse_difftree_raw_line($difftree[0]);
6202                 $file_parent ||= $diffinfo{'from_file'} || $file_name;
6203                 $file_name   ||= $diffinfo{'to_file'};
6204
6205                 $hash_parent ||= $diffinfo{'from_id'};
6206                 $hash        ||= $diffinfo{'to_id'};
6207
6208                 # non-textual hash id's can be cached
6209                 if ($hash_base =~ m/^[0-9a-fA-F]{40}$/ &&
6210                     $hash_parent_base =~ m/^[0-9a-fA-F]{40}$/) {
6211                         $expires = '+1d';
6212                 }
6213
6214                 # open patch output
6215                 open $fd, "-|", git_cmd(), "diff-tree", '-r', @diff_opts,
6216                         '-p', ($format eq 'html' ? "--full-index" : ()),
6217                         $hash_parent_base, $hash_base,
6218                         "--", (defined $file_parent ? $file_parent : ()), $file_name
6219                         or die_error(500, "Open git-diff-tree failed");
6220         }
6221
6222         # old/legacy style URI -- not generated anymore since 1.4.3.
6223         if (!%diffinfo) {
6224                 die_error('404 Not Found', "Missing one of the blob diff parameters")
6225         }
6226
6227         # header
6228         if ($format eq 'html') {
6229                 my $formats_nav =
6230                         $cgi->a({-href => href(action=>"blobdiff_plain", -replay=>1)},
6231                                 "raw");
6232                 git_header_html(undef, $expires);
6233                 if (defined $hash_base && (my %co = parse_commit($hash_base))) {
6234                         git_print_page_nav('','', $hash_base,$co{'tree'},$hash_base, $formats_nav);
6235                         git_print_header_div('commit', esc_html($co{'title'}), $hash_base);
6236                 } else {
6237                         print "<div class=\"page_nav\"><br/>$formats_nav<br/></div>\n";
6238                         print "<div class=\"title\">$hash vs $hash_parent</div>\n";
6239                 }
6240                 if (defined $file_name) {
6241                         git_print_page_path($file_name, "blob", $hash_base);
6242                 } else {
6243                         print "<div class=\"page_path\"></div>\n";
6244                 }
6245
6246         } elsif ($format eq 'plain') {
6247                 print $cgi->header(
6248                         -type => 'text/plain',
6249                         -charset => 'utf-8',
6250                         -expires => $expires,
6251                         -content_disposition => 'inline; filename="' . "$file_name" . '.patch"');
6252
6253                 print "X-Git-Url: " . $cgi->self_url() . "\n\n";
6254
6255         } else {
6256                 die_error(400, "Unknown blobdiff format");
6257         }
6258
6259         # patch
6260         if ($format eq 'html') {
6261                 print "<div class=\"page_body\">\n";
6262
6263                 git_patchset_body($fd, [ \%diffinfo ], $hash_base, $hash_parent_base);
6264                 close $fd;
6265
6266                 print "</div>\n"; # class="page_body"
6267                 git_footer_html();
6268
6269         } else {
6270                 while (my $line = <$fd>) {
6271                         $line =~ s!a/($hash|$hash_parent)!'a/'.esc_path($diffinfo{'from_file'})!eg;
6272                         $line =~ s!b/($hash|$hash_parent)!'b/'.esc_path($diffinfo{'to_file'})!eg;
6273
6274                         print $line;
6275
6276                         last if $line =~ m!^\+\+\+!;
6277                 }
6278                 local $/ = undef;
6279                 print <$fd>;
6280                 close $fd;
6281         }
6282 }
6283
6284 sub git_blobdiff_plain {
6285         git_blobdiff('plain');
6286 }
6287
6288 sub git_commitdiff {
6289         my %params = @_;
6290         my $format = $params{-format} || 'html';
6291
6292         my ($patch_max) = gitweb_get_feature('patches');
6293         if ($format eq 'patch') {
6294                 die_error(403, "Patch view not allowed") unless $patch_max;
6295         }
6296
6297         $hash ||= $hash_base || "HEAD";
6298         my %co = parse_commit($hash)
6299             or die_error(404, "Unknown commit object");
6300
6301         # choose format for commitdiff for merge
6302         if (! defined $hash_parent && @{$co{'parents'}} > 1) {
6303                 $hash_parent = '--cc';
6304         }
6305         # we need to prepare $formats_nav before almost any parameter munging
6306         my $formats_nav;
6307         if ($format eq 'html') {
6308                 $formats_nav =
6309                         $cgi->a({-href => href(action=>"commitdiff_plain", -replay=>1)},
6310                                 "raw");
6311                 if ($patch_max && @{$co{'parents'}} <= 1) {
6312                         $formats_nav .= " | " .
6313                                 $cgi->a({-href => href(action=>"patch", -replay=>1)},
6314                                         "patch");
6315                 }
6316
6317                 if (defined $hash_parent &&
6318                     $hash_parent ne '-c' && $hash_parent ne '--cc') {
6319                         # commitdiff with two commits given
6320                         my $hash_parent_short = $hash_parent;
6321                         if ($hash_parent =~ m/^[0-9a-fA-F]{40}$/) {
6322                                 $hash_parent_short = substr($hash_parent, 0, 7);
6323                         }
6324                         $formats_nav .=
6325                                 ' (from';
6326                         for (my $i = 0; $i < @{$co{'parents'}}; $i++) {
6327                                 if ($co{'parents'}[$i] eq $hash_parent) {
6328                                         $formats_nav .= ' parent ' . ($i+1);
6329                                         last;
6330                                 }
6331                         }
6332                         $formats_nav .= ': ' .
6333                                 $cgi->a({-href => href(action=>"commitdiff",
6334                                                        hash=>$hash_parent)},
6335                                         esc_html($hash_parent_short)) .
6336                                 ')';
6337                 } elsif (!$co{'parent'}) {
6338                         # --root commitdiff
6339                         $formats_nav .= ' (initial)';
6340                 } elsif (scalar @{$co{'parents'}} == 1) {
6341                         # single parent commit
6342                         $formats_nav .=
6343                                 ' (parent: ' .
6344                                 $cgi->a({-href => href(action=>"commitdiff",
6345                                                        hash=>$co{'parent'})},
6346                                         esc_html(substr($co{'parent'}, 0, 7))) .
6347                                 ')';
6348                 } else {
6349                         # merge commit
6350                         if ($hash_parent eq '--cc') {
6351                                 $formats_nav .= ' | ' .
6352                                         $cgi->a({-href => href(action=>"commitdiff",
6353                                                                hash=>$hash, hash_parent=>'-c')},
6354                                                 'combined');
6355                         } else { # $hash_parent eq '-c'
6356                                 $formats_nav .= ' | ' .
6357                                         $cgi->a({-href => href(action=>"commitdiff",
6358                                                                hash=>$hash, hash_parent=>'--cc')},
6359                                                 'compact');
6360                         }
6361                         $formats_nav .=
6362                                 ' (merge: ' .
6363                                 join(' ', map {
6364                                         $cgi->a({-href => href(action=>"commitdiff",
6365                                                                hash=>$_)},
6366                                                 esc_html(substr($_, 0, 7)));
6367                                 } @{$co{'parents'}} ) .
6368                                 ')';
6369                 }
6370         }
6371
6372         my $hash_parent_param = $hash_parent;
6373         if (!defined $hash_parent_param) {
6374                 # --cc for multiple parents, --root for parentless
6375                 $hash_parent_param =
6376                         @{$co{'parents'}} > 1 ? '--cc' : $co{'parent'} || '--root';
6377         }
6378
6379         # read commitdiff
6380         my $fd;
6381         my @difftree;
6382         if ($format eq 'html') {
6383                 open $fd, "-|", git_cmd(), "diff-tree", '-r', @diff_opts,
6384                         "--no-commit-id", "--patch-with-raw", "--full-index",
6385                         $hash_parent_param, $hash, "--"
6386                         or die_error(500, "Open git-diff-tree failed");
6387
6388                 while (my $line = <$fd>) {
6389                         chomp $line;
6390                         # empty line ends raw part of diff-tree output
6391                         last unless $line;
6392                         push @difftree, scalar parse_difftree_raw_line($line);
6393                 }
6394
6395         } elsif ($format eq 'plain') {
6396                 open $fd, "-|", git_cmd(), "diff-tree", '-r', @diff_opts,
6397                         '-p', $hash_parent_param, $hash, "--"
6398                         or die_error(500, "Open git-diff-tree failed");
6399         } elsif ($format eq 'patch') {
6400                 # For commit ranges, we limit the output to the number of
6401                 # patches specified in the 'patches' feature.
6402                 # For single commits, we limit the output to a single patch,
6403                 # diverging from the git-format-patch default.
6404                 my @commit_spec = ();
6405                 if ($hash_parent) {
6406                         if ($patch_max > 0) {
6407                                 push @commit_spec, "-$patch_max";
6408                         }
6409                         push @commit_spec, '-n', "$hash_parent..$hash";
6410                 } else {
6411                         if ($params{-single}) {
6412                                 push @commit_spec, '-1';
6413                         } else {
6414                                 if ($patch_max > 0) {
6415                                         push @commit_spec, "-$patch_max";
6416                                 }
6417                                 push @commit_spec, "-n";
6418                         }
6419                         push @commit_spec, '--root', $hash;
6420                 }
6421                 open $fd, "-|", git_cmd(), "format-patch", @diff_opts,
6422                         '--encoding=utf8', '--stdout', @commit_spec
6423                         or die_error(500, "Open git-format-patch failed");
6424         } else {
6425                 die_error(400, "Unknown commitdiff format");
6426         }
6427
6428         # non-textual hash id's can be cached
6429         my $expires;
6430         if ($hash =~ m/^[0-9a-fA-F]{40}$/) {
6431                 $expires = "+1d";
6432         }
6433
6434         # write commit message
6435         if ($format eq 'html') {
6436                 my $refs = git_get_references();
6437                 my $ref = format_ref_marker($refs, $co{'id'});
6438
6439                 git_header_html(undef, $expires);
6440                 git_print_page_nav('commitdiff','', $hash,$co{'tree'},$hash, $formats_nav);
6441                 git_print_header_div('commit', esc_html($co{'title'}) . $ref, $hash);
6442                 print "<div class=\"title_text\">\n" .
6443                       "<table class=\"object_header\">\n";
6444                 git_print_authorship_rows(\%co);
6445                 print "</table>".
6446                       "</div>\n";
6447                 print "<div class=\"page_body\">\n";
6448                 if (@{$co{'comment'}} > 1) {
6449                         print "<div class=\"log\">\n";
6450                         git_print_log($co{'comment'}, -final_empty_line=> 1, -remove_title => 1);
6451                         print "</div>\n"; # class="log"
6452                 }
6453
6454         } elsif ($format eq 'plain') {
6455                 my $refs = git_get_references("tags");
6456                 my $tagname = git_get_rev_name_tags($hash);
6457                 my $filename = basename($project) . "-$hash.patch";
6458
6459                 print $cgi->header(
6460                         -type => 'text/plain',
6461                         -charset => 'utf-8',
6462                         -expires => $expires,
6463                         -content_disposition => 'inline; filename="' . "$filename" . '"');
6464                 my %ad = parse_date($co{'author_epoch'}, $co{'author_tz'});
6465                 print "From: " . to_utf8($co{'author'}) . "\n";
6466                 print "Date: $ad{'rfc2822'} ($ad{'tz_local'})\n";
6467                 print "Subject: " . to_utf8($co{'title'}) . "\n";
6468
6469                 print "X-Git-Tag: $tagname\n" if $tagname;
6470                 print "X-Git-Url: " . $cgi->self_url() . "\n\n";
6471
6472                 foreach my $line (@{$co{'comment'}}) {
6473                         print to_utf8($line) . "\n";
6474                 }
6475                 print "---\n\n";
6476         } elsif ($format eq 'patch') {
6477                 my $filename = basename($project) . "-$hash.patch";
6478
6479                 print $cgi->header(
6480                         -type => 'text/plain',
6481                         -charset => 'utf-8',
6482                         -expires => $expires,
6483                         -content_disposition => 'inline; filename="' . "$filename" . '"');
6484         }
6485
6486         # write patch
6487         if ($format eq 'html') {
6488                 my $use_parents = !defined $hash_parent ||
6489                         $hash_parent eq '-c' || $hash_parent eq '--cc';
6490                 git_difftree_body(\@difftree, $hash,
6491                                   $use_parents ? @{$co{'parents'}} : $hash_parent);
6492                 print "<br/>\n";
6493
6494                 git_patchset_body($fd, \@difftree, $hash,
6495                                   $use_parents ? @{$co{'parents'}} : $hash_parent);
6496                 close $fd;
6497                 print "</div>\n"; # class="page_body"
6498                 git_footer_html();
6499
6500         } elsif ($format eq 'plain') {
6501                 local $/ = undef;
6502                 print <$fd>;
6503                 close $fd
6504                         or print "Reading git-diff-tree failed\n";
6505         } elsif ($format eq 'patch') {
6506                 local $/ = undef;
6507                 print <$fd>;
6508                 close $fd
6509                         or print "Reading git-format-patch failed\n";
6510         }
6511 }
6512
6513 sub git_commitdiff_plain {
6514         git_commitdiff(-format => 'plain');
6515 }
6516
6517 # format-patch-style patches
6518 sub git_patch {
6519         git_commitdiff(-format => 'patch', -single => 1);
6520 }
6521
6522 sub git_patches {
6523         git_commitdiff(-format => 'patch');
6524 }
6525
6526 sub git_history {
6527         git_log_generic('history', \&git_history_body,
6528                         $hash_base, $hash_parent_base,
6529                         $file_name, $hash);
6530 }
6531
6532 sub git_search {
6533         gitweb_check_feature('search') or die_error(403, "Search is disabled");
6534         if (!defined $searchtext) {
6535                 die_error(400, "Text field is empty");
6536         }
6537         if (!defined $hash) {
6538                 $hash = git_get_head_hash($project);
6539         }
6540         my %co = parse_commit($hash);
6541         if (!%co) {
6542                 die_error(404, "Unknown commit object");
6543         }
6544         if (!defined $page) {
6545                 $page = 0;
6546         }
6547
6548         $searchtype ||= 'commit';
6549         if ($searchtype eq 'pickaxe') {
6550                 # pickaxe may take all resources of your box and run for several minutes
6551                 # with every query - so decide by yourself how public you make this feature
6552                 gitweb_check_feature('pickaxe')
6553                     or die_error(403, "Pickaxe is disabled");
6554         }
6555         if ($searchtype eq 'grep') {
6556                 gitweb_check_feature('grep')
6557                     or die_error(403, "Grep is disabled");
6558         }
6559
6560         git_header_html();
6561
6562         if ($searchtype eq 'commit' or $searchtype eq 'author' or $searchtype eq 'committer') {
6563                 my $greptype;
6564                 if ($searchtype eq 'commit') {
6565                         $greptype = "--grep=";
6566                 } elsif ($searchtype eq 'author') {
6567                         $greptype = "--author=";
6568                 } elsif ($searchtype eq 'committer') {
6569                         $greptype = "--committer=";
6570                 }
6571                 $greptype .= $searchtext;
6572                 my @commitlist = parse_commits($hash, 101, (100 * $page), undef,
6573                                                $greptype, '--regexp-ignore-case',
6574                                                $search_use_regexp ? '--extended-regexp' : '--fixed-strings');
6575
6576                 my $paging_nav = '';
6577                 if ($page > 0) {
6578                         $paging_nav .=
6579                                 $cgi->a({-href => href(action=>"search", hash=>$hash,
6580                                                        searchtext=>$searchtext,
6581                                                        searchtype=>$searchtype)},
6582                                         "first");
6583                         $paging_nav .= " &sdot; " .
6584                                 $cgi->a({-href => href(-replay=>1, page=>$page-1),
6585                                          -accesskey => "p", -title => "Alt-p"}, "prev");
6586                 } else {
6587                         $paging_nav .= "first";
6588                         $paging_nav .= " &sdot; prev";
6589                 }
6590                 my $next_link = '';
6591                 if ($#commitlist >= 100) {
6592                         $next_link =
6593                                 $cgi->a({-href => href(-replay=>1, page=>$page+1),
6594                                          -accesskey => "n", -title => "Alt-n"}, "next");
6595                         $paging_nav .= " &sdot; $next_link";
6596                 } else {
6597                         $paging_nav .= " &sdot; next";
6598                 }
6599
6600                 git_print_page_nav('','', $hash,$co{'tree'},$hash, $paging_nav);
6601                 git_print_header_div('commit', esc_html($co{'title'}), $hash);
6602                 if ($page == 0 && !@commitlist) {
6603                         print "<p>No match.</p>\n";
6604                 } else {
6605                         git_search_grep_body(\@commitlist, 0, 99, $next_link);
6606                 }
6607         }
6608
6609         if ($searchtype eq 'pickaxe') {
6610                 git_print_page_nav('','', $hash,$co{'tree'},$hash);
6611                 git_print_header_div('commit', esc_html($co{'title'}), $hash);
6612
6613                 print "<table class=\"pickaxe search\">\n";
6614                 my $alternate = 1;
6615                 local $/ = "\n";
6616                 open my $fd, '-|', git_cmd(), '--no-pager', 'log', @diff_opts,
6617                         '--pretty=format:%H', '--no-abbrev', '--raw', "-S$searchtext",
6618                         ($search_use_regexp ? '--pickaxe-regex' : ());
6619                 undef %co;
6620                 my @files;
6621                 while (my $line = <$fd>) {
6622                         chomp $line;
6623                         next unless $line;
6624
6625                         my %set = parse_difftree_raw_line($line);
6626                         if (defined $set{'commit'}) {
6627                                 # finish previous commit
6628                                 if (%co) {
6629                                         print "</td>\n" .
6630                                               "<td class=\"link\">" .
6631                                               $cgi->a({-href => href(action=>"commit", hash=>$co{'id'})}, "commit") .
6632                                               " | " .
6633                                               $cgi->a({-href => href(action=>"tree", hash=>$co{'tree'}, hash_base=>$co{'id'})}, "tree");
6634                                         print "</td>\n" .
6635                                               "</tr>\n";
6636                                 }
6637
6638                                 if ($alternate) {
6639                                         print "<tr class=\"dark\">\n";
6640                                 } else {
6641                                         print "<tr class=\"light\">\n";
6642                                 }
6643                                 $alternate ^= 1;
6644                                 %co = parse_commit($set{'commit'});
6645                                 my $author = chop_and_escape_str($co{'author_name'}, 15, 5);
6646                                 print "<td title=\"$co{'age_string_age'}\"><i>$co{'age_string_date'}</i></td>\n" .
6647                                       "<td><i>$author</i></td>\n" .
6648                                       "<td>" .
6649                                       $cgi->a({-href => href(action=>"commit", hash=>$co{'id'}),
6650                                               -class => "list subject"},
6651                                               chop_and_escape_str($co{'title'}, 50) . "<br/>");
6652                         } elsif (defined $set{'to_id'}) {
6653                                 next if ($set{'to_id'} =~ m/^0{40}$/);
6654
6655                                 print $cgi->a({-href => href(action=>"blob", hash_base=>$co{'id'},
6656                                                              hash=>$set{'to_id'}, file_name=>$set{'to_file'}),
6657                                               -class => "list"},
6658                                               "<span class=\"match\">" . esc_path($set{'file'}) . "</span>") .
6659                                       "<br/>\n";
6660                         }
6661                 }
6662                 close $fd;
6663
6664                 # finish last commit (warning: repetition!)
6665                 if (%co) {
6666                         print "</td>\n" .
6667                               "<td class=\"link\">" .
6668                               $cgi->a({-href => href(action=>"commit", hash=>$co{'id'})}, "commit") .
6669                               " | " .
6670                               $cgi->a({-href => href(action=>"tree", hash=>$co{'tree'}, hash_base=>$co{'id'})}, "tree");
6671                         print "</td>\n" .
6672                               "</tr>\n";
6673                 }
6674
6675                 print "</table>\n";
6676         }
6677
6678         if ($searchtype eq 'grep') {
6679                 git_print_page_nav('','', $hash,$co{'tree'},$hash);
6680                 git_print_header_div('commit', esc_html($co{'title'}), $hash);
6681
6682                 print "<table class=\"grep_search\">\n";
6683                 my $alternate = 1;
6684                 my $matches = 0;
6685                 local $/ = "\n";
6686                 open my $fd, "-|", git_cmd(), 'grep', '-n',
6687                         $search_use_regexp ? ('-E', '-i') : '-F',
6688                         $searchtext, $co{'tree'};
6689                 my $lastfile = '';
6690                 while (my $line = <$fd>) {
6691                         chomp $line;
6692                         my ($file, $lno, $ltext, $binary);
6693                         last if ($matches++ > 1000);
6694                         if ($line =~ /^Binary file (.+) matches$/) {
6695                                 $file = $1;
6696                                 $binary = 1;
6697                         } else {
6698                                 (undef, $file, $lno, $ltext) = split(/:/, $line, 4);
6699                         }
6700                         if ($file ne $lastfile) {
6701                                 $lastfile and print "</td></tr>\n";
6702                                 if ($alternate++) {
6703                                         print "<tr class=\"dark\">\n";
6704                                 } else {
6705                                         print "<tr class=\"light\">\n";
6706                                 }
6707                                 print "<td class=\"list\">".
6708                                         $cgi->a({-href => href(action=>"blob", hash=>$co{'hash'},
6709                                                                file_name=>"$file"),
6710                                                 -class => "list"}, esc_path($file));
6711                                 print "</td><td>\n";
6712                                 $lastfile = $file;
6713                         }
6714                         if ($binary) {
6715                                 print "<div class=\"binary\">Binary file</div>\n";
6716                         } else {
6717                                 $ltext = untabify($ltext);
6718                                 if ($ltext =~ m/^(.*)($search_regexp)(.*)$/i) {
6719                                         $ltext = esc_html($1, -nbsp=>1);
6720                                         $ltext .= '<span class="match">';
6721                                         $ltext .= esc_html($2, -nbsp=>1);
6722                                         $ltext .= '</span>';
6723                                         $ltext .= esc_html($3, -nbsp=>1);
6724                                 } else {
6725                                         $ltext = esc_html($ltext, -nbsp=>1);
6726                                 }
6727                                 print "<div class=\"pre\">" .
6728                                         $cgi->a({-href => href(action=>"blob", hash=>$co{'hash'},
6729                                                                file_name=>"$file").'#l'.$lno,
6730                                                 -class => "linenr"}, sprintf('%4i', $lno))
6731                                         . ' ' .  $ltext . "</div>\n";
6732                         }
6733                 }
6734                 if ($lastfile) {
6735                         print "</td></tr>\n";
6736                         if ($matches > 1000) {
6737                                 print "<div class=\"diff nodifferences\">Too many matches, listing trimmed</div>\n";
6738                         }
6739                 } else {
6740                         print "<div class=\"diff nodifferences\">No matches found</div>\n";
6741                 }
6742                 close $fd;
6743
6744                 print "</table>\n";
6745         }
6746         git_footer_html();
6747 }
6748
6749 sub git_search_help {
6750         git_header_html();
6751         git_print_page_nav('','', $hash,$hash,$hash);
6752         print <<EOT;
6753 <p><strong>Pattern</strong> is by default a normal string that is matched precisely (but without
6754 regard to case, except in the case of pickaxe). However, when you check the <em>re</em> checkbox,
6755 the pattern entered is recognized as the POSIX extended
6756 <a href="http://en.wikipedia.org/wiki/Regular_expression">regular expression</a> (also case
6757 insensitive).</p>
6758 <dl>
6759 <dt><b>commit</b></dt>
6760 <dd>The commit messages and authorship information will be scanned for the given pattern.</dd>
6761 EOT
6762         my $have_grep = gitweb_check_feature('grep');
6763         if ($have_grep) {
6764                 print <<EOT;
6765 <dt><b>grep</b></dt>
6766 <dd>All files in the currently selected tree (HEAD unless you are explicitly browsing
6767     a different one) are searched for the given pattern. On large trees, this search can take
6768 a while and put some strain on the server, so please use it with some consideration. Note that
6769 due to git-grep peculiarity, currently if regexp mode is turned off, the matches are
6770 case-sensitive.</dd>
6771 EOT
6772         }
6773         print <<EOT;
6774 <dt><b>author</b></dt>
6775 <dd>Name and e-mail of the change author and date of birth of the patch will be scanned for the given pattern.</dd>
6776 <dt><b>committer</b></dt>
6777 <dd>Name and e-mail of the committer and date of commit will be scanned for the given pattern.</dd>
6778 EOT
6779         my $have_pickaxe = gitweb_check_feature('pickaxe');
6780         if ($have_pickaxe) {
6781                 print <<EOT;
6782 <dt><b>pickaxe</b></dt>
6783 <dd>All commits that caused the string to appear or disappear from any file (changes that
6784 added, removed or "modified" the string) will be listed. This search can take a while and
6785 takes a lot of strain on the server, so please use it wisely. Note that since you may be
6786 interested even in changes just changing the case as well, this search is case sensitive.</dd>
6787 EOT
6788         }
6789         print "</dl>\n";
6790         git_footer_html();
6791 }
6792
6793 sub git_shortlog {
6794         git_log_generic('shortlog', \&git_shortlog_body,
6795                         $hash, $hash_parent);
6796 }
6797
6798 ## ......................................................................
6799 ## feeds (RSS, Atom; OPML)
6800
6801 sub git_feed {
6802         my $format = shift || 'atom';
6803         my $have_blame = gitweb_check_feature('blame');
6804
6805         # Atom: http://www.atomenabled.org/developers/syndication/
6806         # RSS:  http://www.notestips.com/80256B3A007F2692/1/NAMO5P9UPQ
6807         if ($format ne 'rss' && $format ne 'atom') {
6808                 die_error(400, "Unknown web feed format");
6809         }
6810
6811         # log/feed of current (HEAD) branch, log of given branch, history of file/directory
6812         my $head = $hash || 'HEAD';
6813         my @commitlist = parse_commits($head, 150, 0, $file_name);
6814
6815         my %latest_commit;
6816         my %latest_date;
6817         my $content_type = "application/$format+xml";
6818         if (defined $cgi->http('HTTP_ACCEPT') &&
6819                  $cgi->Accept('text/xml') > $cgi->Accept($content_type)) {
6820                 # browser (feed reader) prefers text/xml
6821                 $content_type = 'text/xml';
6822         }
6823         if (defined($commitlist[0])) {
6824                 %latest_commit = %{$commitlist[0]};
6825                 my $latest_epoch = $latest_commit{'committer_epoch'};
6826                 %latest_date   = parse_date($latest_epoch);
6827                 my $if_modified = $cgi->http('IF_MODIFIED_SINCE');
6828                 if (defined $if_modified) {
6829                         my $since;
6830                         if (eval { require HTTP::Date; 1; }) {
6831                                 $since = HTTP::Date::str2time($if_modified);
6832                         } elsif (eval { require Time::ParseDate; 1; }) {
6833                                 $since = Time::ParseDate::parsedate($if_modified, GMT => 1);
6834                         }
6835                         if (defined $since && $latest_epoch <= $since) {
6836                                 print $cgi->header(
6837                                         -type => $content_type,
6838                                         -charset => 'utf-8',
6839                                         -last_modified => $latest_date{'rfc2822'},
6840                                         -status => '304 Not Modified');
6841                                 return;
6842                         }
6843                 }
6844                 print $cgi->header(
6845                         -type => $content_type,
6846                         -charset => 'utf-8',
6847                         -last_modified => $latest_date{'rfc2822'});
6848         } else {
6849                 print $cgi->header(
6850                         -type => $content_type,
6851                         -charset => 'utf-8');
6852         }
6853
6854         # Optimization: skip generating the body if client asks only
6855         # for Last-Modified date.
6856         return if ($cgi->request_method() eq 'HEAD');
6857
6858         # header variables
6859         my $title = "$site_name - $project/$action";
6860         my $feed_type = 'log';
6861         if (defined $hash) {
6862                 $title .= " - '$hash'";
6863                 $feed_type = 'branch log';
6864                 if (defined $file_name) {
6865                         $title .= " :: $file_name";
6866                         $feed_type = 'history';
6867                 }
6868         } elsif (defined $file_name) {
6869                 $title .= " - $file_name";
6870                 $feed_type = 'history';
6871         }
6872         $title .= " $feed_type";
6873         my $descr = git_get_project_description($project);
6874         if (defined $descr) {
6875                 $descr = esc_html($descr);
6876         } else {
6877                 $descr = "$project " .
6878                          ($format eq 'rss' ? 'RSS' : 'Atom') .
6879                          " feed";
6880         }
6881         my $owner = git_get_project_owner($project);
6882         $owner = esc_html($owner);
6883
6884         #header
6885         my $alt_url;
6886         if (defined $file_name) {
6887                 $alt_url = href(-full=>1, action=>"history", hash=>$hash, file_name=>$file_name);
6888         } elsif (defined $hash) {
6889                 $alt_url = href(-full=>1, action=>"log", hash=>$hash);
6890         } else {
6891                 $alt_url = href(-full=>1, action=>"summary");
6892         }
6893         print qq!<?xml version="1.0" encoding="utf-8"?>\n!;
6894         if ($format eq 'rss') {
6895                 print <<XML;
6896 <rss version="2.0" xmlns:content="http://purl.org/rss/1.0/modules/content/">
6897 <channel>
6898 XML
6899                 print "<title>$title</title>\n" .
6900                       "<link>$alt_url</link>\n" .
6901                       "<description>$descr</description>\n" .
6902                       "<language>en</language>\n" .
6903                       # project owner is responsible for 'editorial' content
6904                       "<managingEditor>$owner</managingEditor>\n";
6905                 if (defined $logo || defined $favicon) {
6906                         # prefer the logo to the favicon, since RSS
6907                         # doesn't allow both
6908                         my $img = esc_url($logo || $favicon);
6909                         print "<image>\n" .
6910                               "<url>$img</url>\n" .
6911                               "<title>$title</title>\n" .
6912                               "<link>$alt_url</link>\n" .
6913                               "</image>\n";
6914                 }
6915                 if (%latest_date) {
6916                         print "<pubDate>$latest_date{'rfc2822'}</pubDate>\n";
6917                         print "<lastBuildDate>$latest_date{'rfc2822'}</lastBuildDate>\n";
6918                 }
6919                 print "<generator>gitweb v.$version/$git_version</generator>\n";
6920         } elsif ($format eq 'atom') {
6921                 print <<XML;
6922 <feed xmlns="http://www.w3.org/2005/Atom">
6923 XML
6924                 print "<title>$title</title>\n" .
6925                       "<subtitle>$descr</subtitle>\n" .
6926                       '<link rel="alternate" type="text/html" href="' .
6927                       $alt_url . '" />' . "\n" .
6928                       '<link rel="self" type="' . $content_type . '" href="' .
6929                       $cgi->self_url() . '" />' . "\n" .
6930                       "<id>" . href(-full=>1) . "</id>\n" .
6931                       # use project owner for feed author
6932                       "<author><name>$owner</name></author>\n";
6933                 if (defined $favicon) {
6934                         print "<icon>" . esc_url($favicon) . "</icon>\n";
6935                 }
6936                 if (defined $logo_url) {
6937                         # not twice as wide as tall: 72 x 27 pixels
6938                         print "<logo>" . esc_url($logo) . "</logo>\n";
6939                 }
6940                 if (! %latest_date) {
6941                         # dummy date to keep the feed valid until commits trickle in:
6942                         print "<updated>1970-01-01T00:00:00Z</updated>\n";
6943                 } else {
6944                         print "<updated>$latest_date{'iso-8601'}</updated>\n";
6945                 }
6946                 print "<generator version='$version/$git_version'>gitweb</generator>\n";
6947         }
6948
6949         # contents
6950         for (my $i = 0; $i <= $#commitlist; $i++) {
6951                 my %co = %{$commitlist[$i]};
6952                 my $commit = $co{'id'};
6953                 # we read 150, we always show 30 and the ones more recent than 48 hours
6954                 if (($i >= 20) && ((time - $co{'author_epoch'}) > 48*60*60)) {
6955                         last;
6956                 }
6957                 my %cd = parse_date($co{'author_epoch'});
6958
6959                 # get list of changed files
6960                 open my $fd, "-|", git_cmd(), "diff-tree", '-r', @diff_opts,
6961                         $co{'parent'} || "--root",
6962                         $co{'id'}, "--", (defined $file_name ? $file_name : ())
6963                         or next;
6964                 my @difftree = map { chomp; $_ } <$fd>;
6965                 close $fd
6966                         or next;
6967
6968                 # print element (entry, item)
6969                 my $co_url = href(-full=>1, action=>"commitdiff", hash=>$commit);
6970                 if ($format eq 'rss') {
6971                         print "<item>\n" .
6972                               "<title>" . esc_html($co{'title'}) . "</title>\n" .
6973                               "<author>" . esc_html($co{'author'}) . "</author>\n" .
6974                               "<pubDate>$cd{'rfc2822'}</pubDate>\n" .
6975                               "<guid isPermaLink=\"true\">$co_url</guid>\n" .
6976                               "<link>$co_url</link>\n" .
6977                               "<description>" . esc_html($co{'title'}) . "</description>\n" .
6978                               "<content:encoded>" .
6979                               "<![CDATA[\n";
6980                 } elsif ($format eq 'atom') {
6981                         print "<entry>\n" .
6982                               "<title type=\"html\">" . esc_html($co{'title'}) . "</title>\n" .
6983                               "<updated>$cd{'iso-8601'}</updated>\n" .
6984                               "<author>\n" .
6985                               "  <name>" . esc_html($co{'author_name'}) . "</name>\n";
6986                         if ($co{'author_email'}) {
6987                                 print "  <email>" . esc_html($co{'author_email'}) . "</email>\n";
6988                         }
6989                         print "</author>\n" .
6990                               # use committer for contributor
6991                               "<contributor>\n" .
6992                               "  <name>" . esc_html($co{'committer_name'}) . "</name>\n";
6993                         if ($co{'committer_email'}) {
6994                                 print "  <email>" . esc_html($co{'committer_email'}) . "</email>\n";
6995                         }
6996                         print "</contributor>\n" .
6997                               "<published>$cd{'iso-8601'}</published>\n" .
6998                               "<link rel=\"alternate\" type=\"text/html\" href=\"$co_url\" />\n" .
6999                               "<id>$co_url</id>\n" .
7000                               "<content type=\"xhtml\" xml:base=\"" . esc_url($my_url) . "\">\n" .
7001                               "<div xmlns=\"http://www.w3.org/1999/xhtml\">\n";
7002                 }
7003                 my $comment = $co{'comment'};
7004                 print "<pre>\n";
7005                 foreach my $line (@$comment) {
7006                         $line = esc_html($line);
7007                         print "$line\n";
7008                 }
7009                 print "</pre><ul>\n";
7010                 foreach my $difftree_line (@difftree) {
7011                         my %difftree = parse_difftree_raw_line($difftree_line);
7012                         next if !$difftree{'from_id'};
7013
7014                         my $file = $difftree{'file'} || $difftree{'to_file'};
7015
7016                         print "<li>" .
7017                               "[" .
7018                               $cgi->a({-href => href(-full=>1, action=>"blobdiff",
7019                                                      hash=>$difftree{'to_id'}, hash_parent=>$difftree{'from_id'},
7020                                                      hash_base=>$co{'id'}, hash_parent_base=>$co{'parent'},
7021                                                      file_name=>$file, file_parent=>$difftree{'from_file'}),
7022                                       -title => "diff"}, 'D');
7023                         if ($have_blame) {
7024                                 print $cgi->a({-href => href(-full=>1, action=>"blame",
7025                                                              file_name=>$file, hash_base=>$commit),
7026                                               -title => "blame"}, 'B');
7027                         }
7028                         # if this is not a feed of a file history
7029                         if (!defined $file_name || $file_name ne $file) {
7030                                 print $cgi->a({-href => href(-full=>1, action=>"history",
7031                                                              file_name=>$file, hash=>$commit),
7032                                               -title => "history"}, 'H');
7033                         }
7034                         $file = esc_path($file);
7035                         print "] ".
7036                               "$file</li>\n";
7037                 }
7038                 if ($format eq 'rss') {
7039                         print "</ul>]]>\n" .
7040                               "</content:encoded>\n" .
7041                               "</item>\n";
7042                 } elsif ($format eq 'atom') {
7043                         print "</ul>\n</div>\n" .
7044                               "</content>\n" .
7045                               "</entry>\n";
7046                 }
7047         }
7048
7049         # end of feed
7050         if ($format eq 'rss') {
7051                 print "</channel>\n</rss>\n";
7052         } elsif ($format eq 'atom') {
7053                 print "</feed>\n";
7054         }
7055 }
7056
7057 sub git_rss {
7058         git_feed('rss');
7059 }
7060
7061 sub git_atom {
7062         git_feed('atom');
7063 }
7064
7065 sub git_opml {
7066         my @list = git_get_projects_list();
7067
7068         print $cgi->header(
7069                 -type => 'text/xml',
7070                 -charset => 'utf-8',
7071                 -content_disposition => 'inline; filename="opml.xml"');
7072
7073         print <<XML;
7074 <?xml version="1.0" encoding="utf-8"?>
7075 <opml version="1.0">
7076 <head>
7077   <title>$site_name OPML Export</title>
7078 </head>
7079 <body>
7080 <outline text="git RSS feeds">
7081 XML
7082
7083         foreach my $pr (@list) {
7084                 my %proj = %$pr;
7085                 my $head = git_get_head_hash($proj{'path'});
7086                 if (!defined $head) {
7087                         next;
7088                 }
7089                 $git_dir = "$projectroot/$proj{'path'}";
7090                 my %co = parse_commit($head);
7091                 if (!%co) {
7092                         next;
7093                 }
7094
7095                 my $path = esc_html(chop_str($proj{'path'}, 25, 5));
7096                 my $rss  = href('project' => $proj{'path'}, 'action' => 'rss', -full => 1);
7097                 my $html = href('project' => $proj{'path'}, 'action' => 'summary', -full => 1);
7098                 print "<outline type=\"rss\" text=\"$path\" title=\"$path\" xmlUrl=\"$rss\" htmlUrl=\"$html\"/>\n";
7099         }
7100         print <<XML;
7101 </outline>
7102 </body>
7103 </opml>
7104 XML
7105 }