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                         print " / $action";
3530                 }
3531                 print "\n";
3532         }
3533         print "</div>\n";
3534
3535         my $have_search = gitweb_check_feature('search');
3536         if (defined $project && $have_search) {
3537                 if (!defined $searchtext) {
3538                         $searchtext = "";
3539                 }
3540                 my $search_hash;
3541                 if (defined $hash_base) {
3542                         $search_hash = $hash_base;
3543                 } elsif (defined $hash) {
3544                         $search_hash = $hash;
3545                 } else {
3546                         $search_hash = "HEAD";
3547                 }
3548                 my $action = $my_uri;
3549                 my $use_pathinfo = gitweb_check_feature('pathinfo');
3550                 if ($use_pathinfo) {
3551                         $action .= "/".esc_url($project);
3552                 }
3553                 print $cgi->startform(-method => "get", -action => $action) .
3554                       "<div class=\"search\">\n" .
3555                       (!$use_pathinfo &&
3556                       $cgi->input({-name=>"p", -value=>$project, -type=>"hidden"}) . "\n") .
3557                       $cgi->input({-name=>"a", -value=>"search", -type=>"hidden"}) . "\n" .
3558                       $cgi->input({-name=>"h", -value=>$search_hash, -type=>"hidden"}) . "\n" .
3559                       $cgi->popup_menu(-name => 'st', -default => 'commit',
3560                                        -values => ['commit', 'grep', 'author', 'committer', 'pickaxe']) .
3561                       $cgi->sup($cgi->a({-href => href(action=>"search_help")}, "?")) .
3562                       " search:\n",
3563                       $cgi->textfield(-name => "s", -value => $searchtext) . "\n" .
3564                       "<span title=\"Extended regular expression\">" .
3565                       $cgi->checkbox(-name => 'sr', -value => 1, -label => 're',
3566                                      -checked => $search_use_regexp) .
3567                       "</span>" .
3568                       "</div>" .
3569                       $cgi->end_form() . "\n";
3570         }
3571 }
3572
3573 sub git_footer_html {
3574         my $feed_class = 'rss_logo';
3575
3576         print "<div class=\"page_footer\">\n";
3577         if (defined $project) {
3578                 my $descr = git_get_project_description($project);
3579                 if (defined $descr) {
3580                         print "<div class=\"page_footer_text\">" . esc_html($descr) . "</div>\n";
3581                 }
3582
3583                 my %href_params = get_feed_info();
3584                 if (!%href_params) {
3585                         $feed_class .= ' generic';
3586                 }
3587                 $href_params{'-title'} ||= 'log';
3588
3589                 foreach my $format qw(RSS Atom) {
3590                         $href_params{'action'} = lc($format);
3591                         print $cgi->a({-href => href(%href_params),
3592                                       -title => "$href_params{'-title'} $format feed",
3593                                       -class => $feed_class}, $format)."\n";
3594                 }
3595
3596         } else {
3597                 print $cgi->a({-href => href(project=>undef, action=>"opml"),
3598                               -class => $feed_class}, "OPML") . " ";
3599                 print $cgi->a({-href => href(project=>undef, action=>"project_index"),
3600                               -class => $feed_class}, "TXT") . "\n";
3601         }
3602         print "</div>\n"; # class="page_footer"
3603
3604         if (defined $t0 && gitweb_check_feature('timed')) {
3605                 print "<div id=\"generating_info\">\n";
3606                 print 'This page took '.
3607                       '<span id="generating_time" class="time_span">'.
3608                       Time::HiRes::tv_interval($t0, [Time::HiRes::gettimeofday()]).
3609                       ' seconds </span>'.
3610                       ' and '.
3611                       '<span id="generating_cmd">'.
3612                       $number_of_git_cmds.
3613                       '</span> git commands '.
3614                       " to generate.\n";
3615                 print "</div>\n"; # class="page_footer"
3616         }
3617
3618         if (defined $site_footer && -f $site_footer) {
3619                 insert_file($site_footer);
3620         }
3621
3622         print qq!<script type="text/javascript" src="$javascript"></script>\n!;
3623         if (defined $action &&
3624             $action eq 'blame_incremental') {
3625                 print qq!<script type="text/javascript">\n!.
3626                       qq!startBlame("!. href(action=>"blame_data", -replay=>1) .qq!",\n!.
3627                       qq!           "!. href() .qq!");\n!.
3628                       qq!</script>\n!;
3629         } elsif (gitweb_check_feature('javascript-actions')) {
3630                 print qq!<script type="text/javascript">\n!.
3631                       qq!window.onload = fixLinks;\n!.
3632                       qq!</script>\n!;
3633         }
3634
3635         print "</body>\n" .
3636               "</html>";
3637 }
3638
3639 # die_error(<http_status_code>, <error_message>[, <detailed_html_description>])
3640 # Example: die_error(404, 'Hash not found')
3641 # By convention, use the following status codes (as defined in RFC 2616):
3642 # 400: Invalid or missing CGI parameters, or
3643 #      requested object exists but has wrong type.
3644 # 403: Requested feature (like "pickaxe" or "snapshot") not enabled on
3645 #      this server or project.
3646 # 404: Requested object/revision/project doesn't exist.
3647 # 500: The server isn't configured properly, or
3648 #      an internal error occurred (e.g. failed assertions caused by bugs), or
3649 #      an unknown error occurred (e.g. the git binary died unexpectedly).
3650 # 503: The server is currently unavailable (because it is overloaded,
3651 #      or down for maintenance).  Generally, this is a temporary state.
3652 sub die_error {
3653         my $status = shift || 500;
3654         my $error = esc_html(shift) || "Internal Server Error";
3655         my $extra = shift;
3656         my %opts = @_;
3657
3658         my %http_responses = (
3659                 400 => '400 Bad Request',
3660                 403 => '403 Forbidden',
3661                 404 => '404 Not Found',
3662                 500 => '500 Internal Server Error',
3663                 503 => '503 Service Unavailable',
3664         );
3665         git_header_html($http_responses{$status}, undef, %opts);
3666         print <<EOF;
3667 <div class="page_body">
3668 <br /><br />
3669 $status - $error
3670 <br />
3671 EOF
3672         if (defined $extra) {
3673                 print "<hr />\n" .
3674                       "$extra\n";
3675         }
3676         print "</div>\n";
3677
3678         git_footer_html();
3679         goto DONE_GITWEB
3680                 unless ($opts{'-error_handler'});
3681 }
3682
3683 ## ----------------------------------------------------------------------
3684 ## functions printing or outputting HTML: navigation
3685
3686 sub git_print_page_nav {
3687         my ($current, $suppress, $head, $treehead, $treebase, $extra) = @_;
3688         $extra = '' if !defined $extra; # pager or formats
3689
3690         my @navs = qw(summary shortlog log commit commitdiff tree);
3691         if ($suppress) {
3692                 @navs = grep { $_ ne $suppress } @navs;
3693         }
3694
3695         my %arg = map { $_ => {action=>$_} } @navs;
3696         if (defined $head) {
3697                 for (qw(commit commitdiff)) {
3698                         $arg{$_}{'hash'} = $head;
3699                 }
3700                 if ($current =~ m/^(tree | log | shortlog | commit | commitdiff | search)$/x) {
3701                         for (qw(shortlog log)) {
3702                                 $arg{$_}{'hash'} = $head;
3703                         }
3704                 }
3705         }
3706
3707         $arg{'tree'}{'hash'} = $treehead if defined $treehead;
3708         $arg{'tree'}{'hash_base'} = $treebase if defined $treebase;
3709
3710         my @actions = gitweb_get_feature('actions');
3711         my %repl = (
3712                 '%' => '%',
3713                 'n' => $project,         # project name
3714                 'f' => $git_dir,         # project path within filesystem
3715                 'h' => $treehead || '',  # current hash ('h' parameter)
3716                 'b' => $treebase || '',  # hash base ('hb' parameter)
3717         );
3718         while (@actions) {
3719                 my ($label, $link, $pos) = splice(@actions,0,3);
3720                 # insert
3721                 @navs = map { $_ eq $pos ? ($_, $label) : $_ } @navs;
3722                 # munch munch
3723                 $link =~ s/%([%nfhb])/$repl{$1}/g;
3724                 $arg{$label}{'_href'} = $link;
3725         }
3726
3727         print "<div class=\"page_nav\">\n" .
3728                 (join " | ",
3729                  map { $_ eq $current ?
3730                        $_ : $cgi->a({-href => ($arg{$_}{_href} ? $arg{$_}{_href} : href(%{$arg{$_}}))}, "$_")
3731                  } @navs);
3732         print "<br/>\n$extra<br/>\n" .
3733               "</div>\n";
3734 }
3735
3736 sub format_paging_nav {
3737         my ($action, $page, $has_next_link) = @_;
3738         my $paging_nav;
3739
3740
3741         if ($page > 0) {
3742                 $paging_nav .=
3743                         $cgi->a({-href => href(-replay=>1, page=>undef)}, "first") .
3744                         " &sdot; " .
3745                         $cgi->a({-href => href(-replay=>1, page=>$page-1),
3746                                  -accesskey => "p", -title => "Alt-p"}, "prev");
3747         } else {
3748                 $paging_nav .= "first &sdot; prev";
3749         }
3750
3751         if ($has_next_link) {
3752                 $paging_nav .= " &sdot; " .
3753                         $cgi->a({-href => href(-replay=>1, page=>$page+1),
3754                                  -accesskey => "n", -title => "Alt-n"}, "next");
3755         } else {
3756                 $paging_nav .= " &sdot; next";
3757         }
3758
3759         return $paging_nav;
3760 }
3761
3762 ## ......................................................................
3763 ## functions printing or outputting HTML: div
3764
3765 sub git_print_header_div {
3766         my ($action, $title, $hash, $hash_base) = @_;
3767         my %args = ();
3768
3769         $args{'action'} = $action;
3770         $args{'hash'} = $hash if $hash;
3771         $args{'hash_base'} = $hash_base if $hash_base;
3772
3773         print "<div class=\"header\">\n" .
3774               $cgi->a({-href => href(%args), -class => "title"},
3775               $title ? $title : $action) .
3776               "\n</div>\n";
3777 }
3778
3779 sub print_local_time {
3780         print format_local_time(@_);
3781 }
3782
3783 sub format_local_time {
3784         my $localtime = '';
3785         my %date = @_;
3786         if ($date{'hour_local'} < 6) {
3787                 $localtime .= sprintf(" (<span class=\"atnight\">%02d:%02d</span> %s)",
3788                         $date{'hour_local'}, $date{'minute_local'}, $date{'tz_local'});
3789         } else {
3790                 $localtime .= sprintf(" (%02d:%02d %s)",
3791                         $date{'hour_local'}, $date{'minute_local'}, $date{'tz_local'});
3792         }
3793
3794         return $localtime;
3795 }
3796
3797 # Outputs the author name and date in long form
3798 sub git_print_authorship {
3799         my $co = shift;
3800         my %opts = @_;
3801         my $tag = $opts{-tag} || 'div';
3802         my $author = $co->{'author_name'};
3803
3804         my %ad = parse_date($co->{'author_epoch'}, $co->{'author_tz'});
3805         print "<$tag class=\"author_date\">" .
3806               format_search_author($author, "author", esc_html($author)) .
3807               " [$ad{'rfc2822'}";
3808         print_local_time(%ad) if ($opts{-localtime});
3809         print "]" . git_get_avatar($co->{'author_email'}, -pad_before => 1)
3810                   . "</$tag>\n";
3811 }
3812
3813 # Outputs table rows containing the full author or committer information,
3814 # in the format expected for 'commit' view (& similar).
3815 # Parameters are a commit hash reference, followed by the list of people
3816 # to output information for. If the list is empty it defaults to both
3817 # author and committer.
3818 sub git_print_authorship_rows {
3819         my $co = shift;
3820         # too bad we can't use @people = @_ || ('author', 'committer')
3821         my @people = @_;
3822         @people = ('author', 'committer') unless @people;
3823         foreach my $who (@people) {
3824                 my %wd = parse_date($co->{"${who}_epoch"}, $co->{"${who}_tz"});
3825                 print "<tr><td>$who</td><td>" .
3826                       format_search_author($co->{"${who}_name"}, $who,
3827                                esc_html($co->{"${who}_name"})) . " " .
3828                       format_search_author($co->{"${who}_email"}, $who,
3829                                esc_html("<" . $co->{"${who}_email"} . ">")) .
3830                       "</td><td rowspan=\"2\">" .
3831                       git_get_avatar($co->{"${who}_email"}, -size => 'double') .
3832                       "</td></tr>\n" .
3833                       "<tr>" .
3834                       "<td></td><td> $wd{'rfc2822'}";
3835                 print_local_time(%wd);
3836                 print "</td>" .
3837                       "</tr>\n";
3838         }
3839 }
3840
3841 sub git_print_page_path {
3842         my $name = shift;
3843         my $type = shift;
3844         my $hb = shift;
3845
3846
3847         print "<div class=\"page_path\">";
3848         print $cgi->a({-href => href(action=>"tree", hash_base=>$hb),
3849                       -title => 'tree root'}, to_utf8("[$project]"));
3850         print " / ";
3851         if (defined $name) {
3852                 my @dirname = split '/', $name;
3853                 my $basename = pop @dirname;
3854                 my $fullname = '';
3855
3856                 foreach my $dir (@dirname) {
3857                         $fullname .= ($fullname ? '/' : '') . $dir;
3858                         print $cgi->a({-href => href(action=>"tree", file_name=>$fullname,
3859                                                      hash_base=>$hb),
3860                                       -title => $fullname}, esc_path($dir));
3861                         print " / ";
3862                 }
3863                 if (defined $type && $type eq 'blob') {
3864                         print $cgi->a({-href => href(action=>"blob_plain", file_name=>$file_name,
3865                                                      hash_base=>$hb),
3866                                       -title => $name}, esc_path($basename));
3867                 } elsif (defined $type && $type eq 'tree') {
3868                         print $cgi->a({-href => href(action=>"tree", file_name=>$file_name,
3869                                                      hash_base=>$hb),
3870                                       -title => $name}, esc_path($basename));
3871                         print " / ";
3872                 } else {
3873                         print esc_path($basename);
3874                 }
3875         }
3876         print "<br/></div>\n";
3877 }
3878
3879 sub git_print_log {
3880         my $log = shift;
3881         my %opts = @_;
3882
3883         if ($opts{'-remove_title'}) {
3884                 # remove title, i.e. first line of log
3885                 shift @$log;
3886         }
3887         # remove leading empty lines
3888         while (defined $log->[0] && $log->[0] eq "") {
3889                 shift @$log;
3890         }
3891
3892         # print log
3893         my $signoff = 0;
3894         my $empty = 0;
3895         foreach my $line (@$log) {
3896                 if ($line =~ m/^ *(signed[ \-]off[ \-]by[ :]|acked[ \-]by[ :]|cc[ :])/i) {
3897                         $signoff = 1;
3898                         $empty = 0;
3899                         if (! $opts{'-remove_signoff'}) {
3900                                 print "<span class=\"signoff\">" . esc_html($line) . "</span><br/>\n";
3901                                 next;
3902                         } else {
3903                                 # remove signoff lines
3904                                 next;
3905                         }
3906                 } else {
3907                         $signoff = 0;
3908                 }
3909
3910                 # print only one empty line
3911                 # do not print empty line after signoff
3912                 if ($line eq "") {
3913                         next if ($empty || $signoff);
3914                         $empty = 1;
3915                 } else {
3916                         $empty = 0;
3917                 }
3918
3919                 print format_log_line_html($line) . "<br/>\n";
3920         }
3921
3922         if ($opts{'-final_empty_line'}) {
3923                 # end with single empty line
3924                 print "<br/>\n" unless $empty;
3925         }
3926 }
3927
3928 # return link target (what link points to)
3929 sub git_get_link_target {
3930         my $hash = shift;
3931         my $link_target;
3932
3933         # read link
3934         open my $fd, "-|", git_cmd(), "cat-file", "blob", $hash
3935                 or return;
3936         {
3937                 local $/ = undef;
3938                 $link_target = <$fd>;
3939         }
3940         close $fd
3941                 or return;
3942
3943         return $link_target;
3944 }
3945
3946 # given link target, and the directory (basedir) the link is in,
3947 # return target of link relative to top directory (top tree);
3948 # return undef if it is not possible (including absolute links).
3949 sub normalize_link_target {
3950         my ($link_target, $basedir) = @_;
3951
3952         # absolute symlinks (beginning with '/') cannot be normalized
3953         return if (substr($link_target, 0, 1) eq '/');
3954
3955         # normalize link target to path from top (root) tree (dir)
3956         my $path;
3957         if ($basedir) {
3958                 $path = $basedir . '/' . $link_target;
3959         } else {
3960                 # we are in top (root) tree (dir)
3961                 $path = $link_target;
3962         }
3963
3964         # remove //, /./, and /../
3965         my @path_parts;
3966         foreach my $part (split('/', $path)) {
3967                 # discard '.' and ''
3968                 next if (!$part || $part eq '.');
3969                 # handle '..'
3970                 if ($part eq '..') {
3971                         if (@path_parts) {
3972                                 pop @path_parts;
3973                         } else {
3974                                 # link leads outside repository (outside top dir)
3975                                 return;
3976                         }
3977                 } else {
3978                         push @path_parts, $part;
3979                 }
3980         }
3981         $path = join('/', @path_parts);
3982
3983         return $path;
3984 }
3985
3986 # print tree entry (row of git_tree), but without encompassing <tr> element
3987 sub git_print_tree_entry {
3988         my ($t, $basedir, $hash_base, $have_blame) = @_;
3989
3990         my %base_key = ();
3991         $base_key{'hash_base'} = $hash_base if defined $hash_base;
3992
3993         # The format of a table row is: mode list link.  Where mode is
3994         # the mode of the entry, list is the name of the entry, an href,
3995         # and link is the action links of the entry.
3996
3997         print "<td class=\"mode\">" . mode_str($t->{'mode'}) . "</td>\n";
3998         if (exists $t->{'size'}) {
3999                 print "<td class=\"size\">$t->{'size'}</td>\n";
4000         }
4001         if ($t->{'type'} eq "blob") {
4002                 print "<td class=\"list\">" .
4003                         $cgi->a({-href => href(action=>"blob", hash=>$t->{'hash'},
4004                                                file_name=>"$basedir$t->{'name'}", %base_key),
4005                                 -class => "list"}, esc_path($t->{'name'}));
4006                 if (S_ISLNK(oct $t->{'mode'})) {
4007                         my $link_target = git_get_link_target($t->{'hash'});
4008                         if ($link_target) {
4009                                 my $norm_target = normalize_link_target($link_target, $basedir);
4010                                 if (defined $norm_target) {
4011                                         print " -> " .
4012                                               $cgi->a({-href => href(action=>"object", hash_base=>$hash_base,
4013                                                                      file_name=>$norm_target),
4014                                                        -title => $norm_target}, esc_path($link_target));
4015                                 } else {
4016                                         print " -> " . esc_path($link_target);
4017                                 }
4018                         }
4019                 }
4020                 print "</td>\n";
4021                 print "<td class=\"link\">";
4022                 print $cgi->a({-href => href(action=>"blob", hash=>$t->{'hash'},
4023                                              file_name=>"$basedir$t->{'name'}", %base_key)},
4024                               "blob");
4025                 if ($have_blame) {
4026                         print " | " .
4027                               $cgi->a({-href => href(action=>"blame", hash=>$t->{'hash'},
4028                                                      file_name=>"$basedir$t->{'name'}", %base_key)},
4029                                       "blame");
4030                 }
4031                 if (defined $hash_base) {
4032                         print " | " .
4033                               $cgi->a({-href => href(action=>"history", hash_base=>$hash_base,
4034                                                      hash=>$t->{'hash'}, file_name=>"$basedir$t->{'name'}")},
4035                                       "history");
4036                 }
4037                 print " | " .
4038                         $cgi->a({-href => href(action=>"blob_plain", hash_base=>$hash_base,
4039                                                file_name=>"$basedir$t->{'name'}")},
4040                                 "raw");
4041                 print "</td>\n";
4042
4043         } elsif ($t->{'type'} eq "tree") {
4044                 print "<td class=\"list\">";
4045                 print $cgi->a({-href => href(action=>"tree", hash=>$t->{'hash'},
4046                                              file_name=>"$basedir$t->{'name'}",
4047                                              %base_key)},
4048                               esc_path($t->{'name'}));
4049                 print "</td>\n";
4050                 print "<td class=\"link\">";
4051                 print $cgi->a({-href => href(action=>"tree", hash=>$t->{'hash'},
4052                                              file_name=>"$basedir$t->{'name'}",
4053                                              %base_key)},
4054                               "tree");
4055                 if (defined $hash_base) {
4056                         print " | " .
4057                               $cgi->a({-href => href(action=>"history", hash_base=>$hash_base,
4058                                                      file_name=>"$basedir$t->{'name'}")},
4059                                       "history");
4060                 }
4061                 print "</td>\n";
4062         } else {
4063                 # unknown object: we can only present history for it
4064                 # (this includes 'commit' object, i.e. submodule support)
4065                 print "<td class=\"list\">" .
4066                       esc_path($t->{'name'}) .
4067                       "</td>\n";
4068                 print "<td class=\"link\">";
4069                 if (defined $hash_base) {
4070                         print $cgi->a({-href => href(action=>"history",
4071                                                      hash_base=>$hash_base,
4072                                                      file_name=>"$basedir$t->{'name'}")},
4073                                       "history");
4074                 }
4075                 print "</td>\n";
4076         }
4077 }
4078
4079 ## ......................................................................
4080 ## functions printing large fragments of HTML
4081
4082 # get pre-image filenames for merge (combined) diff
4083 sub fill_from_file_info {
4084         my ($diff, @parents) = @_;
4085
4086         $diff->{'from_file'} = [ ];
4087         $diff->{'from_file'}[$diff->{'nparents'} - 1] = undef;
4088         for (my $i = 0; $i < $diff->{'nparents'}; $i++) {
4089                 if ($diff->{'status'}[$i] eq 'R' ||
4090                     $diff->{'status'}[$i] eq 'C') {
4091                         $diff->{'from_file'}[$i] =
4092                                 git_get_path_by_hash($parents[$i], $diff->{'from_id'}[$i]);
4093                 }
4094         }
4095
4096         return $diff;
4097 }
4098
4099 # is current raw difftree line of file deletion
4100 sub is_deleted {
4101         my $diffinfo = shift;
4102
4103         return $diffinfo->{'to_id'} eq ('0' x 40);
4104 }
4105
4106 # does patch correspond to [previous] difftree raw line
4107 # $diffinfo  - hashref of parsed raw diff format
4108 # $patchinfo - hashref of parsed patch diff format
4109 #              (the same keys as in $diffinfo)
4110 sub is_patch_split {
4111         my ($diffinfo, $patchinfo) = @_;
4112
4113         return defined $diffinfo && defined $patchinfo
4114                 && $diffinfo->{'to_file'} eq $patchinfo->{'to_file'};
4115 }
4116
4117
4118 sub git_difftree_body {
4119         my ($difftree, $hash, @parents) = @_;
4120         my ($parent) = $parents[0];
4121         my $have_blame = gitweb_check_feature('blame');
4122         print "<div class=\"list_head\">\n";
4123         if ($#{$difftree} > 10) {
4124                 print(($#{$difftree} + 1) . " files changed:\n");
4125         }
4126         print "</div>\n";
4127
4128         print "<table class=\"" .
4129               (@parents > 1 ? "combined " : "") .
4130               "diff_tree\">\n";
4131
4132         # header only for combined diff in 'commitdiff' view
4133         my $has_header = @$difftree && @parents > 1 && $action eq 'commitdiff';
4134         if ($has_header) {
4135                 # table header
4136                 print "<thead><tr>\n" .
4137                        "<th></th><th></th>\n"; # filename, patchN link
4138                 for (my $i = 0; $i < @parents; $i++) {
4139                         my $par = $parents[$i];
4140                         print "<th>" .
4141                               $cgi->a({-href => href(action=>"commitdiff",
4142                                                      hash=>$hash, hash_parent=>$par),
4143                                        -title => 'commitdiff to parent number ' .
4144                                                   ($i+1) . ': ' . substr($par,0,7)},
4145                                       $i+1) .
4146                               "&nbsp;</th>\n";
4147                 }
4148                 print "</tr></thead>\n<tbody>\n";
4149         }
4150
4151         my $alternate = 1;
4152         my $patchno = 0;
4153         foreach my $line (@{$difftree}) {
4154                 my $diff = parsed_difftree_line($line);
4155
4156                 if ($alternate) {
4157                         print "<tr class=\"dark\">\n";
4158                 } else {
4159                         print "<tr class=\"light\">\n";
4160                 }
4161                 $alternate ^= 1;
4162
4163                 if (exists $diff->{'nparents'}) { # combined diff
4164
4165                         fill_from_file_info($diff, @parents)
4166                                 unless exists $diff->{'from_file'};
4167
4168                         if (!is_deleted($diff)) {
4169                                 # file exists in the result (child) commit
4170                                 print "<td>" .
4171                                       $cgi->a({-href => href(action=>"blob", hash=>$diff->{'to_id'},
4172                                                              file_name=>$diff->{'to_file'},
4173                                                              hash_base=>$hash),
4174                                               -class => "list"}, esc_path($diff->{'to_file'})) .
4175                                       "</td>\n";
4176                         } else {
4177                                 print "<td>" .
4178                                       esc_path($diff->{'to_file'}) .
4179                                       "</td>\n";
4180                         }
4181
4182                         if ($action eq 'commitdiff') {
4183                                 # link to patch
4184                                 $patchno++;
4185                                 print "<td class=\"link\">" .
4186                                       $cgi->a({-href => "#patch$patchno"}, "patch") .
4187                                       " | " .
4188                                       "</td>\n";
4189                         }
4190
4191                         my $has_history = 0;
4192                         my $not_deleted = 0;
4193                         for (my $i = 0; $i < $diff->{'nparents'}; $i++) {
4194                                 my $hash_parent = $parents[$i];
4195                                 my $from_hash = $diff->{'from_id'}[$i];
4196                                 my $from_path = $diff->{'from_file'}[$i];
4197                                 my $status = $diff->{'status'}[$i];
4198
4199                                 $has_history ||= ($status ne 'A');
4200                                 $not_deleted ||= ($status ne 'D');
4201
4202                                 if ($status eq 'A') {
4203                                         print "<td  class=\"link\" align=\"right\"> | </td>\n";
4204                                 } elsif ($status eq 'D') {
4205                                         print "<td class=\"link\">" .
4206                                               $cgi->a({-href => href(action=>"blob",
4207                                                                      hash_base=>$hash,
4208                                                                      hash=>$from_hash,
4209                                                                      file_name=>$from_path)},
4210                                                       "blob" . ($i+1)) .
4211                                               " | </td>\n";
4212                                 } else {
4213                                         if ($diff->{'to_id'} eq $from_hash) {
4214                                                 print "<td class=\"link nochange\">";
4215                                         } else {
4216                                                 print "<td class=\"link\">";
4217                                         }
4218                                         print $cgi->a({-href => href(action=>"blobdiff",
4219                                                                      hash=>$diff->{'to_id'},
4220                                                                      hash_parent=>$from_hash,
4221                                                                      hash_base=>$hash,
4222                                                                      hash_parent_base=>$hash_parent,
4223                                                                      file_name=>$diff->{'to_file'},
4224                                                                      file_parent=>$from_path)},
4225                                                       "diff" . ($i+1)) .
4226                                               " | </td>\n";
4227                                 }
4228                         }
4229
4230                         print "<td class=\"link\">";
4231                         if ($not_deleted) {
4232                                 print $cgi->a({-href => href(action=>"blob",
4233                                                              hash=>$diff->{'to_id'},
4234                                                              file_name=>$diff->{'to_file'},
4235                                                              hash_base=>$hash)},
4236                                               "blob");
4237                                 print " | " if ($has_history);
4238                         }
4239                         if ($has_history) {
4240                                 print $cgi->a({-href => href(action=>"history",
4241                                                              file_name=>$diff->{'to_file'},
4242                                                              hash_base=>$hash)},
4243                                               "history");
4244                         }
4245                         print "</td>\n";
4246
4247                         print "</tr>\n";
4248                         next; # instead of 'else' clause, to avoid extra indent
4249                 }
4250                 # else ordinary diff
4251
4252                 my ($to_mode_oct, $to_mode_str, $to_file_type);
4253                 my ($from_mode_oct, $from_mode_str, $from_file_type);
4254                 if ($diff->{'to_mode'} ne ('0' x 6)) {
4255                         $to_mode_oct = oct $diff->{'to_mode'};
4256                         if (S_ISREG($to_mode_oct)) { # only for regular file
4257                                 $to_mode_str = sprintf("%04o", $to_mode_oct & 0777); # permission bits
4258                         }
4259                         $to_file_type = file_type($diff->{'to_mode'});
4260                 }
4261                 if ($diff->{'from_mode'} ne ('0' x 6)) {
4262                         $from_mode_oct = oct $diff->{'from_mode'};
4263                         if (S_ISREG($to_mode_oct)) { # only for regular file
4264                                 $from_mode_str = sprintf("%04o", $from_mode_oct & 0777); # permission bits
4265                         }
4266                         $from_file_type = file_type($diff->{'from_mode'});
4267                 }
4268
4269                 if ($diff->{'status'} eq "A") { # created
4270                         my $mode_chng = "<span class=\"file_status new\">[new $to_file_type";
4271                         $mode_chng   .= " with mode: $to_mode_str" if $to_mode_str;
4272                         $mode_chng   .= "]</span>";
4273                         print "<td>";
4274                         print $cgi->a({-href => href(action=>"blob", hash=>$diff->{'to_id'},
4275                                                      hash_base=>$hash, file_name=>$diff->{'file'}),
4276                                       -class => "list"}, esc_path($diff->{'file'}));
4277                         print "</td>\n";
4278                         print "<td>$mode_chng</td>\n";
4279                         print "<td class=\"link\">";
4280                         if ($action eq 'commitdiff') {
4281                                 # link to patch
4282                                 $patchno++;
4283                                 print $cgi->a({-href => "#patch$patchno"}, "patch");
4284                                 print " | ";
4285                         }
4286                         print $cgi->a({-href => href(action=>"blob", hash=>$diff->{'to_id'},
4287                                                      hash_base=>$hash, file_name=>$diff->{'file'})},
4288                                       "blob");
4289                         print "</td>\n";
4290
4291                 } elsif ($diff->{'status'} eq "D") { # deleted
4292                         my $mode_chng = "<span class=\"file_status deleted\">[deleted $from_file_type]</span>";
4293                         print "<td>";
4294                         print $cgi->a({-href => href(action=>"blob", hash=>$diff->{'from_id'},
4295                                                      hash_base=>$parent, file_name=>$diff->{'file'}),
4296                                        -class => "list"}, esc_path($diff->{'file'}));
4297                         print "</td>\n";
4298                         print "<td>$mode_chng</td>\n";
4299                         print "<td class=\"link\">";
4300                         if ($action eq 'commitdiff') {
4301                                 # link to patch
4302                                 $patchno++;
4303                                 print $cgi->a({-href => "#patch$patchno"}, "patch");
4304                                 print " | ";
4305                         }
4306                         print $cgi->a({-href => href(action=>"blob", hash=>$diff->{'from_id'},
4307                                                      hash_base=>$parent, file_name=>$diff->{'file'})},
4308                                       "blob") . " | ";
4309                         if ($have_blame) {
4310                                 print $cgi->a({-href => href(action=>"blame", hash_base=>$parent,
4311                                                              file_name=>$diff->{'file'})},
4312                                               "blame") . " | ";
4313                         }
4314                         print $cgi->a({-href => href(action=>"history", hash_base=>$parent,
4315                                                      file_name=>$diff->{'file'})},
4316                                       "history");
4317                         print "</td>\n";
4318
4319                 } elsif ($diff->{'status'} eq "M" || $diff->{'status'} eq "T") { # modified, or type changed
4320                         my $mode_chnge = "";
4321                         if ($diff->{'from_mode'} != $diff->{'to_mode'}) {
4322                                 $mode_chnge = "<span class=\"file_status mode_chnge\">[changed";
4323                                 if ($from_file_type ne $to_file_type) {
4324                                         $mode_chnge .= " from $from_file_type to $to_file_type";
4325                                 }
4326                                 if (($from_mode_oct & 0777) != ($to_mode_oct & 0777)) {
4327                                         if ($from_mode_str && $to_mode_str) {
4328                                                 $mode_chnge .= " mode: $from_mode_str->$to_mode_str";
4329                                         } elsif ($to_mode_str) {
4330                                                 $mode_chnge .= " mode: $to_mode_str";
4331                                         }
4332                                 }
4333                                 $mode_chnge .= "]</span>\n";
4334                         }
4335                         print "<td>";
4336                         print $cgi->a({-href => href(action=>"blob", hash=>$diff->{'to_id'},
4337                                                      hash_base=>$hash, file_name=>$diff->{'file'}),
4338                                       -class => "list"}, esc_path($diff->{'file'}));
4339                         print "</td>\n";
4340                         print "<td>$mode_chnge</td>\n";
4341                         print "<td class=\"link\">";
4342                         if ($action eq 'commitdiff') {
4343                                 # link to patch
4344                                 $patchno++;
4345                                 print $cgi->a({-href => "#patch$patchno"}, "patch") .
4346                                       " | ";
4347                         } elsif ($diff->{'to_id'} ne $diff->{'from_id'}) {
4348                                 # "commit" view and modified file (not onlu mode changed)
4349                                 print $cgi->a({-href => href(action=>"blobdiff",
4350                                                              hash=>$diff->{'to_id'}, hash_parent=>$diff->{'from_id'},
4351                                                              hash_base=>$hash, hash_parent_base=>$parent,
4352                                                              file_name=>$diff->{'file'})},
4353                                               "diff") .
4354                                       " | ";
4355                         }
4356                         print $cgi->a({-href => href(action=>"blob", hash=>$diff->{'to_id'},
4357                                                      hash_base=>$hash, file_name=>$diff->{'file'})},
4358                                        "blob") . " | ";
4359                         if ($have_blame) {
4360                                 print $cgi->a({-href => href(action=>"blame", hash_base=>$hash,
4361                                                              file_name=>$diff->{'file'})},
4362                                               "blame") . " | ";
4363                         }
4364                         print $cgi->a({-href => href(action=>"history", hash_base=>$hash,
4365                                                      file_name=>$diff->{'file'})},
4366                                       "history");
4367                         print "</td>\n";
4368
4369                 } elsif ($diff->{'status'} eq "R" || $diff->{'status'} eq "C") { # renamed or copied
4370                         my %status_name = ('R' => 'moved', 'C' => 'copied');
4371                         my $nstatus = $status_name{$diff->{'status'}};
4372                         my $mode_chng = "";
4373                         if ($diff->{'from_mode'} != $diff->{'to_mode'}) {
4374                                 # mode also for directories, so we cannot use $to_mode_str
4375                                 $mode_chng = sprintf(", mode: %04o", $to_mode_oct & 0777);
4376                         }
4377                         print "<td>" .
4378                               $cgi->a({-href => href(action=>"blob", hash_base=>$hash,
4379                                                      hash=>$diff->{'to_id'}, file_name=>$diff->{'to_file'}),
4380                                       -class => "list"}, esc_path($diff->{'to_file'})) . "</td>\n" .
4381                               "<td><span class=\"file_status $nstatus\">[$nstatus from " .
4382                               $cgi->a({-href => href(action=>"blob", hash_base=>$parent,
4383                                                      hash=>$diff->{'from_id'}, file_name=>$diff->{'from_file'}),
4384                                       -class => "list"}, esc_path($diff->{'from_file'})) .
4385                               " with " . (int $diff->{'similarity'}) . "% similarity$mode_chng]</span></td>\n" .
4386                               "<td class=\"link\">";
4387                         if ($action eq 'commitdiff') {
4388                                 # link to patch
4389                                 $patchno++;
4390                                 print $cgi->a({-href => "#patch$patchno"}, "patch") .
4391                                       " | ";
4392                         } elsif ($diff->{'to_id'} ne $diff->{'from_id'}) {
4393                                 # "commit" view and modified file (not only pure rename or copy)
4394                                 print $cgi->a({-href => href(action=>"blobdiff",
4395                                                              hash=>$diff->{'to_id'}, hash_parent=>$diff->{'from_id'},
4396                                                              hash_base=>$hash, hash_parent_base=>$parent,
4397                                                              file_name=>$diff->{'to_file'}, file_parent=>$diff->{'from_file'})},
4398                                               "diff") .
4399                                       " | ";
4400                         }
4401                         print $cgi->a({-href => href(action=>"blob", hash=>$diff->{'to_id'},
4402                                                      hash_base=>$parent, file_name=>$diff->{'to_file'})},
4403                                       "blob") . " | ";
4404                         if ($have_blame) {
4405                                 print $cgi->a({-href => href(action=>"blame", hash_base=>$hash,
4406                                                              file_name=>$diff->{'to_file'})},
4407                                               "blame") . " | ";
4408                         }
4409                         print $cgi->a({-href => href(action=>"history", hash_base=>$hash,
4410                                                     file_name=>$diff->{'to_file'})},
4411                                       "history");
4412                         print "</td>\n";
4413
4414                 } # we should not encounter Unmerged (U) or Unknown (X) status
4415                 print "</tr>\n";
4416         }
4417         print "</tbody>" if $has_header;
4418         print "</table>\n";
4419 }
4420
4421 sub git_patchset_body {
4422         my ($fd, $difftree, $hash, @hash_parents) = @_;
4423         my ($hash_parent) = $hash_parents[0];
4424
4425         my $is_combined = (@hash_parents > 1);
4426         my $patch_idx = 0;
4427         my $patch_number = 0;
4428         my $patch_line;
4429         my $diffinfo;
4430         my $to_name;
4431         my (%from, %to);
4432
4433         print "<div class=\"patchset\">\n";
4434
4435         # skip to first patch
4436         while ($patch_line = <$fd>) {
4437                 chomp $patch_line;
4438
4439                 last if ($patch_line =~ m/^diff /);
4440         }
4441
4442  PATCH:
4443         while ($patch_line) {
4444
4445                 # parse "git diff" header line
4446                 if ($patch_line =~ m/^diff --git (\"(?:[^\\\"]*(?:\\.[^\\\"]*)*)\"|[^ "]*) (.*)$/) {
4447                         # $1 is from_name, which we do not use
4448                         $to_name = unquote($2);
4449                         $to_name =~ s!^b/!!;
4450                 } elsif ($patch_line =~ m/^diff --(cc|combined) ("?.*"?)$/) {
4451                         # $1 is 'cc' or 'combined', which we do not use
4452                         $to_name = unquote($2);
4453                 } else {
4454                         $to_name = undef;
4455                 }
4456
4457                 # check if current patch belong to current raw line
4458                 # and parse raw git-diff line if needed
4459                 if (is_patch_split($diffinfo, { 'to_file' => $to_name })) {
4460                         # this is continuation of a split patch
4461                         print "<div class=\"patch cont\">\n";
4462                 } else {
4463                         # advance raw git-diff output if needed
4464                         $patch_idx++ if defined $diffinfo;
4465
4466                         # read and prepare patch information
4467                         $diffinfo = parsed_difftree_line($difftree->[$patch_idx]);
4468
4469                         # compact combined diff output can have some patches skipped
4470                         # find which patch (using pathname of result) we are at now;
4471                         if ($is_combined) {
4472                                 while ($to_name ne $diffinfo->{'to_file'}) {
4473                                         print "<div class=\"patch\" id=\"patch". ($patch_idx+1) ."\">\n" .
4474                                               format_diff_cc_simplified($diffinfo, @hash_parents) .
4475                                               "</div>\n";  # class="patch"
4476
4477                                         $patch_idx++;
4478                                         $patch_number++;
4479
4480                                         last if $patch_idx > $#$difftree;
4481                                         $diffinfo = parsed_difftree_line($difftree->[$patch_idx]);
4482                                 }
4483                         }
4484
4485                         # modifies %from, %to hashes
4486                         parse_from_to_diffinfo($diffinfo, \%from, \%to, @hash_parents);
4487
4488                         # this is first patch for raw difftree line with $patch_idx index
4489                         # we index @$difftree array from 0, but number patches from 1
4490                         print "<div class=\"patch\" id=\"patch". ($patch_idx+1) ."\">\n";
4491                 }
4492
4493                 # git diff header
4494                 #assert($patch_line =~ m/^diff /) if DEBUG;
4495                 #assert($patch_line !~ m!$/$!) if DEBUG; # is chomp-ed
4496                 $patch_number++;
4497                 # print "git diff" header
4498                 print format_git_diff_header_line($patch_line, $diffinfo,
4499                                                   \%from, \%to);
4500
4501                 # print extended diff header
4502                 print "<div class=\"diff extended_header\">\n";
4503         EXTENDED_HEADER:
4504                 while ($patch_line = <$fd>) {
4505                         chomp $patch_line;
4506
4507                         last EXTENDED_HEADER if ($patch_line =~ m/^--- |^diff /);
4508
4509                         print format_extended_diff_header_line($patch_line, $diffinfo,
4510                                                                \%from, \%to);
4511                 }
4512                 print "</div>\n"; # class="diff extended_header"
4513
4514                 # from-file/to-file diff header
4515                 if (! $patch_line) {
4516                         print "</div>\n"; # class="patch"
4517                         last PATCH;
4518                 }
4519                 next PATCH if ($patch_line =~ m/^diff /);
4520                 #assert($patch_line =~ m/^---/) if DEBUG;
4521
4522                 my $last_patch_line = $patch_line;
4523                 $patch_line = <$fd>;
4524                 chomp $patch_line;
4525                 #assert($patch_line =~ m/^\+\+\+/) if DEBUG;
4526
4527                 print format_diff_from_to_header($last_patch_line, $patch_line,
4528                                                  $diffinfo, \%from, \%to,
4529                                                  @hash_parents);
4530
4531                 # the patch itself
4532         LINE:
4533                 while ($patch_line = <$fd>) {
4534                         chomp $patch_line;
4535
4536                         next PATCH if ($patch_line =~ m/^diff /);
4537
4538                         print format_diff_line($patch_line, \%from, \%to);
4539                 }
4540
4541         } continue {
4542                 print "</div>\n"; # class="patch"
4543         }
4544
4545         # for compact combined (--cc) format, with chunk and patch simplification
4546         # the patchset might be empty, but there might be unprocessed raw lines
4547         for (++$patch_idx if $patch_number > 0;
4548              $patch_idx < @$difftree;
4549              ++$patch_idx) {
4550                 # read and prepare patch information
4551                 $diffinfo = parsed_difftree_line($difftree->[$patch_idx]);
4552
4553                 # generate anchor for "patch" links in difftree / whatchanged part
4554                 print "<div class=\"patch\" id=\"patch". ($patch_idx+1) ."\">\n" .
4555                       format_diff_cc_simplified($diffinfo, @hash_parents) .
4556                       "</div>\n";  # class="patch"
4557
4558                 $patch_number++;
4559         }
4560
4561         if ($patch_number == 0) {
4562                 if (@hash_parents > 1) {
4563                         print "<div class=\"diff nodifferences\">Trivial merge</div>\n";
4564                 } else {
4565                         print "<div class=\"diff nodifferences\">No differences found</div>\n";
4566                 }
4567         }
4568
4569         print "</div>\n"; # class="patchset"
4570 }
4571
4572 # . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
4573
4574 # fills project list info (age, description, owner, forks) for each
4575 # project in the list, removing invalid projects from returned list
4576 # NOTE: modifies $projlist, but does not remove entries from it
4577 sub fill_project_list_info {
4578         my ($projlist, $check_forks) = @_;
4579         my @projects;
4580
4581         my $show_ctags = gitweb_check_feature('ctags');
4582  PROJECT:
4583         foreach my $pr (@$projlist) {
4584                 my (@activity) = git_get_last_activity($pr->{'path'});
4585                 unless (@activity) {
4586                         next PROJECT;
4587                 }
4588                 ($pr->{'age'}, $pr->{'age_string'}) = @activity;
4589                 if (!defined $pr->{'descr'}) {
4590                         my $descr = git_get_project_description($pr->{'path'}) || "";
4591                         $descr = to_utf8($descr);
4592                         $pr->{'descr_long'} = $descr;
4593                         $pr->{'descr'} = chop_str($descr, $projects_list_description_width, 5);
4594                 }
4595                 if (!defined $pr->{'owner'}) {
4596                         $pr->{'owner'} = git_get_project_owner("$pr->{'path'}") || "";
4597                 }
4598                 if ($check_forks) {
4599                         my $pname = $pr->{'path'};
4600                         if (($pname =~ s/\.git$//) &&
4601                             ($pname !~ /\/$/) &&
4602                             (-d "$projectroot/$pname")) {
4603                                 $pr->{'forks'} = "-d $projectroot/$pname";
4604                         } else {
4605                                 $pr->{'forks'} = 0;
4606                         }
4607                 }
4608                 $show_ctags and $pr->{'ctags'} = git_get_project_ctags($pr->{'path'});
4609                 push @projects, $pr;
4610         }
4611
4612         return @projects;
4613 }
4614
4615 # print 'sort by' <th> element, generating 'sort by $name' replay link
4616 # if that order is not selected
4617 sub print_sort_th {
4618         print format_sort_th(@_);
4619 }
4620
4621 sub format_sort_th {
4622         my ($name, $order, $header) = @_;
4623         my $sort_th = "";
4624         $header ||= ucfirst($name);
4625
4626         if ($order eq $name) {
4627                 $sort_th .= "<th>$header</th>\n";
4628         } else {
4629                 $sort_th .= "<th>" .
4630                             $cgi->a({-href => href(-replay=>1, order=>$name),
4631                                      -class => "header"}, $header) .
4632                             "</th>\n";
4633         }
4634
4635         return $sort_th;
4636 }
4637
4638 sub git_project_list_body {
4639         # actually uses global variable $project
4640         my ($projlist, $order, $from, $to, $extra, $no_header) = @_;
4641
4642         my $check_forks = gitweb_check_feature('forks');
4643         my @projects = fill_project_list_info($projlist, $check_forks);
4644
4645         $order ||= $default_projects_order;
4646         $from = 0 unless defined $from;
4647         $to = $#projects if (!defined $to || $#projects < $to);
4648
4649         my %order_info = (
4650                 project => { key => 'path', type => 'str' },
4651                 descr => { key => 'descr_long', type => 'str' },
4652                 owner => { key => 'owner', type => 'str' },
4653                 age => { key => 'age', type => 'num' }
4654         );
4655         my $oi = $order_info{$order};
4656         if ($oi->{'type'} eq 'str') {
4657                 @projects = sort {$a->{$oi->{'key'}} cmp $b->{$oi->{'key'}}} @projects;
4658         } else {
4659                 @projects = sort {$a->{$oi->{'key'}} <=> $b->{$oi->{'key'}}} @projects;
4660         }
4661
4662         my $show_ctags = gitweb_check_feature('ctags');
4663         if ($show_ctags) {
4664                 my %ctags;
4665                 foreach my $p (@projects) {
4666                         foreach my $ct (keys %{$p->{'ctags'}}) {
4667                                 $ctags{$ct} += $p->{'ctags'}->{$ct};
4668                         }
4669                 }
4670                 my $cloud = git_populate_project_tagcloud(\%ctags);
4671                 print git_show_project_tagcloud($cloud, 64);
4672         }
4673
4674         print "<table class=\"project_list\">\n";
4675         unless ($no_header) {
4676                 print "<tr>\n";
4677                 if ($check_forks) {
4678                         print "<th></th>\n";
4679                 }
4680                 print_sort_th('project', $order, 'Project');
4681                 print_sort_th('descr', $order, 'Description');
4682                 print_sort_th('owner', $order, 'Owner');
4683                 print_sort_th('age', $order, 'Last Change');
4684                 print "<th></th>\n" . # for links
4685                       "</tr>\n";
4686         }
4687         my $alternate = 1;
4688         my $tagfilter = $cgi->param('by_tag');
4689         for (my $i = $from; $i <= $to; $i++) {
4690                 my $pr = $projects[$i];
4691
4692                 next if $tagfilter and $show_ctags and not grep { lc $_ eq lc $tagfilter } keys %{$pr->{'ctags'}};
4693                 next if $searchtext and not $pr->{'path'} =~ /$searchtext/
4694                         and not $pr->{'descr_long'} =~ /$searchtext/;
4695                 # Weed out forks or non-matching entries of search
4696                 if ($check_forks) {
4697                         my $forkbase = $project; $forkbase ||= ''; $forkbase =~ s#\.git$#/#;
4698                         $forkbase="^$forkbase" if $forkbase;
4699                         next if not $searchtext and not $tagfilter and $show_ctags
4700                                 and $pr->{'path'} =~ m#$forkbase.*/.*#; # regexp-safe
4701                 }
4702
4703                 if ($alternate) {
4704                         print "<tr class=\"dark\">\n";
4705                 } else {
4706                         print "<tr class=\"light\">\n";
4707                 }
4708                 $alternate ^= 1;
4709                 if ($check_forks) {
4710                         print "<td>";
4711                         if ($pr->{'forks'}) {
4712                                 print "<!-- $pr->{'forks'} -->\n";
4713                                 print $cgi->a({-href => href(project=>$pr->{'path'}, action=>"forks")}, "+");
4714                         }
4715                         print "</td>\n";
4716                 }
4717                 print "<td>" . $cgi->a({-href => href(project=>$pr->{'path'}, action=>"summary"),
4718                                         -class => "list"}, esc_html($pr->{'path'})) . "</td>\n" .
4719                       "<td>" . $cgi->a({-href => href(project=>$pr->{'path'}, action=>"summary"),
4720                                         -class => "list", -title => $pr->{'descr_long'}},
4721                                         esc_html($pr->{'descr'})) . "</td>\n" .
4722                       "<td><i>" . chop_and_escape_str($pr->{'owner'}, 15) . "</i></td>\n";
4723                 print "<td class=\"". age_class($pr->{'age'}) . "\">" .
4724                       (defined $pr->{'age_string'} ? $pr->{'age_string'} : "No commits") . "</td>\n" .
4725                       "<td class=\"link\">" .
4726                       $cgi->a({-href => href(project=>$pr->{'path'}, action=>"summary")}, "summary")   . " | " .
4727                       $cgi->a({-href => href(project=>$pr->{'path'}, action=>"shortlog")}, "shortlog") . " | " .
4728                       $cgi->a({-href => href(project=>$pr->{'path'}, action=>"log")}, "log") . " | " .
4729                       $cgi->a({-href => href(project=>$pr->{'path'}, action=>"tree")}, "tree") .
4730                       ($pr->{'forks'} ? " | " . $cgi->a({-href => href(project=>$pr->{'path'}, action=>"forks")}, "forks") : '') .
4731                       "</td>\n" .
4732                       "</tr>\n";
4733         }
4734         if (defined $extra) {
4735                 print "<tr>\n";
4736                 if ($check_forks) {
4737                         print "<td></td>\n";
4738                 }
4739                 print "<td colspan=\"5\">$extra</td>\n" .
4740                       "</tr>\n";
4741         }
4742         print "</table>\n";
4743 }
4744
4745 sub git_log_body {
4746         # uses global variable $project
4747         my ($commitlist, $from, $to, $refs, $extra) = @_;
4748
4749         $from = 0 unless defined $from;
4750         $to = $#{$commitlist} if (!defined $to || $#{$commitlist} < $to);
4751
4752         for (my $i = 0; $i <= $to; $i++) {
4753                 my %co = %{$commitlist->[$i]};
4754                 next if !%co;
4755                 my $commit = $co{'id'};
4756                 my $ref = format_ref_marker($refs, $commit);
4757                 my %ad = parse_date($co{'author_epoch'});
4758                 git_print_header_div('commit',
4759                                "<span class=\"age\">$co{'age_string'}</span>" .
4760                                esc_html($co{'title'}) . $ref,
4761                                $commit);
4762                 print "<div class=\"title_text\">\n" .
4763                       "<div class=\"log_link\">\n" .
4764                       $cgi->a({-href => href(action=>"commit", hash=>$commit)}, "commit") .
4765                       " | " .
4766                       $cgi->a({-href => href(action=>"commitdiff", hash=>$commit)}, "commitdiff") .
4767                       " | " .
4768                       $cgi->a({-href => href(action=>"tree", hash=>$commit, hash_base=>$commit)}, "tree") .
4769                       "<br/>\n" .
4770                       "</div>\n";
4771                       git_print_authorship(\%co, -tag => 'span');
4772                       print "<br/>\n</div>\n";
4773
4774                 print "<div class=\"log_body\">\n";
4775                 git_print_log($co{'comment'}, -final_empty_line=> 1);
4776                 print "</div>\n";
4777         }
4778         if ($extra) {
4779                 print "<div class=\"page_nav\">\n";
4780                 print "$extra\n";
4781                 print "</div>\n";
4782         }
4783 }
4784
4785 sub git_shortlog_body {
4786         # uses global variable $project
4787         my ($commitlist, $from, $to, $refs, $extra) = @_;
4788
4789         $from = 0 unless defined $from;
4790         $to = $#{$commitlist} if (!defined $to || $#{$commitlist} < $to);
4791
4792         print "<table class=\"shortlog\">\n";
4793         my $alternate = 1;
4794         for (my $i = $from; $i <= $to; $i++) {
4795                 my %co = %{$commitlist->[$i]};
4796                 my $commit = $co{'id'};
4797                 my $ref = format_ref_marker($refs, $commit);
4798                 if ($alternate) {
4799                         print "<tr class=\"dark\">\n";
4800                 } else {
4801                         print "<tr class=\"light\">\n";
4802                 }
4803                 $alternate ^= 1;
4804                 # git_summary() used print "<td><i>$co{'age_string'}</i></td>\n" .
4805                 print "<td title=\"$co{'age_string_age'}\"><i>$co{'age_string_date'}</i></td>\n" .
4806                       format_author_html('td', \%co, 10) . "<td>";
4807                 print format_subject_html($co{'title'}, $co{'title_short'},
4808                                           href(action=>"commit", hash=>$commit), $ref);
4809                 print "</td>\n" .
4810                       "<td class=\"link\">" .
4811                       $cgi->a({-href => href(action=>"commit", hash=>$commit)}, "commit") . " | " .
4812                       $cgi->a({-href => href(action=>"commitdiff", hash=>$commit)}, "commitdiff") . " | " .
4813                       $cgi->a({-href => href(action=>"tree", hash=>$commit, hash_base=>$commit)}, "tree");
4814                 my $snapshot_links = format_snapshot_links($commit);
4815                 if (defined $snapshot_links) {
4816                         print " | " . $snapshot_links;
4817                 }
4818                 print "</td>\n" .
4819                       "</tr>\n";
4820         }
4821         if (defined $extra) {
4822                 print "<tr>\n" .
4823                       "<td colspan=\"4\">$extra</td>\n" .
4824                       "</tr>\n";
4825         }
4826         print "</table>\n";
4827 }
4828
4829 sub git_history_body {
4830         # Warning: assumes constant type (blob or tree) during history
4831         my ($commitlist, $from, $to, $refs, $extra,
4832             $file_name, $file_hash, $ftype) = @_;
4833
4834         $from = 0 unless defined $from;
4835         $to = $#{$commitlist} unless (defined $to && $to <= $#{$commitlist});
4836
4837         print "<table class=\"history\">\n";
4838         my $alternate = 1;
4839         for (my $i = $from; $i <= $to; $i++) {
4840                 my %co = %{$commitlist->[$i]};
4841                 if (!%co) {
4842                         next;
4843                 }
4844                 my $commit = $co{'id'};
4845
4846                 my $ref = format_ref_marker($refs, $commit);
4847
4848                 if ($alternate) {
4849                         print "<tr class=\"dark\">\n";
4850                 } else {
4851                         print "<tr class=\"light\">\n";
4852                 }
4853                 $alternate ^= 1;
4854                 print "<td title=\"$co{'age_string_age'}\"><i>$co{'age_string_date'}</i></td>\n" .
4855         # shortlog:   format_author_html('td', \%co, 10)
4856                       format_author_html('td', \%co, 15, 3) . "<td>";
4857                 # originally git_history used chop_str($co{'title'}, 50)
4858                 print format_subject_html($co{'title'}, $co{'title_short'},
4859                                           href(action=>"commit", hash=>$commit), $ref);
4860                 print "</td>\n" .
4861                       "<td class=\"link\">" .
4862                       $cgi->a({-href => href(action=>$ftype, hash_base=>$commit, file_name=>$file_name)}, $ftype) . " | " .
4863                       $cgi->a({-href => href(action=>"commitdiff", hash=>$commit)}, "commitdiff");
4864
4865                 if ($ftype eq 'blob') {
4866                         my $blob_current = $file_hash;
4867                         my $blob_parent  = git_get_hash_by_path($commit, $file_name);
4868                         if (defined $blob_current && defined $blob_parent &&
4869                                         $blob_current ne $blob_parent) {
4870                                 print " | " .
4871                                         $cgi->a({-href => href(action=>"blobdiff",
4872                                                                hash=>$blob_current, hash_parent=>$blob_parent,
4873                                                                hash_base=>$hash_base, hash_parent_base=>$commit,
4874                                                                file_name=>$file_name)},
4875                                                 "diff to current");
4876                         }
4877                 }
4878                 print "</td>\n" .
4879                       "</tr>\n";
4880         }
4881         if (defined $extra) {
4882                 print "<tr>\n" .
4883                       "<td colspan=\"4\">$extra</td>\n" .
4884                       "</tr>\n";
4885         }
4886         print "</table>\n";
4887 }
4888
4889 sub git_tags_body {
4890         # uses global variable $project
4891         my ($taglist, $from, $to, $extra) = @_;
4892         $from = 0 unless defined $from;
4893         $to = $#{$taglist} if (!defined $to || $#{$taglist} < $to);
4894
4895         print "<table class=\"tags\">\n";
4896         my $alternate = 1;
4897         for (my $i = $from; $i <= $to; $i++) {
4898                 my $entry = $taglist->[$i];
4899                 my %tag = %$entry;
4900                 my $comment = $tag{'subject'};
4901                 my $comment_short;
4902                 if (defined $comment) {
4903                         $comment_short = chop_str($comment, 30, 5);
4904                 }
4905                 if ($alternate) {
4906                         print "<tr class=\"dark\">\n";
4907                 } else {
4908                         print "<tr class=\"light\">\n";
4909                 }
4910                 $alternate ^= 1;
4911                 if (defined $tag{'age'}) {
4912                         print "<td><i>$tag{'age'}</i></td>\n";
4913                 } else {
4914                         print "<td></td>\n";
4915                 }
4916                 print "<td>" .
4917                       $cgi->a({-href => href(action=>$tag{'reftype'}, hash=>$tag{'refid'}),
4918                                -class => "list name"}, esc_html($tag{'name'})) .
4919                       "</td>\n" .
4920                       "<td>";
4921                 if (defined $comment) {
4922                         print format_subject_html($comment, $comment_short,
4923                                                   href(action=>"tag", hash=>$tag{'id'}));
4924                 }
4925                 print "</td>\n" .
4926                       "<td class=\"selflink\">";
4927                 if ($tag{'type'} eq "tag") {
4928                         print $cgi->a({-href => href(action=>"tag", hash=>$tag{'id'})}, "tag");
4929                 } else {
4930                         print "&nbsp;";
4931                 }
4932                 print "</td>\n" .
4933                       "<td class=\"link\">" . " | " .
4934                       $cgi->a({-href => href(action=>$tag{'reftype'}, hash=>$tag{'refid'})}, $tag{'reftype'});
4935                 if ($tag{'reftype'} eq "commit") {
4936                         print " | " . $cgi->a({-href => href(action=>"shortlog", hash=>$tag{'fullname'})}, "shortlog") .
4937                               " | " . $cgi->a({-href => href(action=>"log", hash=>$tag{'fullname'})}, "log");
4938                 } elsif ($tag{'reftype'} eq "blob") {
4939                         print " | " . $cgi->a({-href => href(action=>"blob_plain", hash=>$tag{'refid'})}, "raw");
4940                 }
4941                 print "</td>\n" .
4942                       "</tr>";
4943         }
4944         if (defined $extra) {
4945                 print "<tr>\n" .
4946                       "<td colspan=\"5\">$extra</td>\n" .
4947                       "</tr>\n";
4948         }
4949         print "</table>\n";
4950 }
4951
4952 sub git_heads_body {
4953         # uses global variable $project
4954         my ($headlist, $head, $from, $to, $extra) = @_;
4955         $from = 0 unless defined $from;
4956         $to = $#{$headlist} if (!defined $to || $#{$headlist} < $to);
4957
4958         print "<table class=\"heads\">\n";
4959         my $alternate = 1;
4960         for (my $i = $from; $i <= $to; $i++) {
4961                 my $entry = $headlist->[$i];
4962                 my %ref = %$entry;
4963                 my $curr = $ref{'id'} eq $head;
4964                 if ($alternate) {
4965                         print "<tr class=\"dark\">\n";
4966                 } else {
4967                         print "<tr class=\"light\">\n";
4968                 }
4969                 $alternate ^= 1;
4970                 print "<td><i>$ref{'age'}</i></td>\n" .
4971                       ($curr ? "<td class=\"current_head\">" : "<td>") .
4972                       $cgi->a({-href => href(action=>"shortlog", hash=>$ref{'fullname'}),
4973                                -class => "list name"},esc_html($ref{'name'})) .
4974                       "</td>\n" .
4975                       "<td class=\"link\">" .
4976                       $cgi->a({-href => href(action=>"shortlog", hash=>$ref{'fullname'})}, "shortlog") . " | " .
4977                       $cgi->a({-href => href(action=>"log", hash=>$ref{'fullname'})}, "log") . " | " .
4978                       $cgi->a({-href => href(action=>"tree", hash=>$ref{'fullname'}, hash_base=>$ref{'fullname'})}, "tree") .
4979                       "</td>\n" .
4980                       "</tr>";
4981         }
4982         if (defined $extra) {
4983                 print "<tr>\n" .
4984                       "<td colspan=\"3\">$extra</td>\n" .
4985                       "</tr>\n";
4986         }
4987         print "</table>\n";
4988 }
4989
4990 sub git_search_grep_body {
4991         my ($commitlist, $from, $to, $extra) = @_;
4992         $from = 0 unless defined $from;
4993         $to = $#{$commitlist} if (!defined $to || $#{$commitlist} < $to);
4994
4995         print "<table class=\"commit_search\">\n";
4996         my $alternate = 1;
4997         for (my $i = $from; $i <= $to; $i++) {
4998                 my %co = %{$commitlist->[$i]};
4999                 if (!%co) {
5000                         next;
5001                 }
5002                 my $commit = $co{'id'};
5003                 if ($alternate) {
5004                         print "<tr class=\"dark\">\n";
5005                 } else {
5006                         print "<tr class=\"light\">\n";
5007                 }
5008                 $alternate ^= 1;
5009                 print "<td title=\"$co{'age_string_age'}\"><i>$co{'age_string_date'}</i></td>\n" .
5010                       format_author_html('td', \%co, 15, 5) .
5011                       "<td>" .
5012                       $cgi->a({-href => href(action=>"commit", hash=>$co{'id'}),
5013                                -class => "list subject"},
5014                               chop_and_escape_str($co{'title'}, 50) . "<br/>");
5015                 my $comment = $co{'comment'};
5016                 foreach my $line (@$comment) {
5017                         if ($line =~ m/^(.*?)($search_regexp)(.*)$/i) {
5018                                 my ($lead, $match, $trail) = ($1, $2, $3);
5019                                 $match = chop_str($match, 70, 5, 'center');
5020                                 my $contextlen = int((80 - length($match))/2);
5021                                 $contextlen = 30 if ($contextlen > 30);
5022                                 $lead  = chop_str($lead,  $contextlen, 10, 'left');
5023                                 $trail = chop_str($trail, $contextlen, 10, 'right');
5024
5025                                 $lead  = esc_html($lead);
5026                                 $match = esc_html($match);
5027                                 $trail = esc_html($trail);
5028
5029                                 print "$lead<span class=\"match\">$match</span>$trail<br />";
5030                         }
5031                 }
5032                 print "</td>\n" .
5033                       "<td class=\"link\">" .
5034                       $cgi->a({-href => href(action=>"commit", hash=>$co{'id'})}, "commit") .
5035                       " | " .
5036                       $cgi->a({-href => href(action=>"commitdiff", hash=>$co{'id'})}, "commitdiff") .
5037                       " | " .
5038                       $cgi->a({-href => href(action=>"tree", hash=>$co{'tree'}, hash_base=>$co{'id'})}, "tree");
5039                 print "</td>\n" .
5040                       "</tr>\n";
5041         }
5042         if (defined $extra) {
5043                 print "<tr>\n" .
5044                       "<td colspan=\"3\">$extra</td>\n" .
5045                       "</tr>\n";
5046         }
5047         print "</table>\n";
5048 }
5049
5050 ## ======================================================================
5051 ## ======================================================================
5052 ## actions
5053
5054 sub git_project_list {
5055         my $order = $input_params{'order'};
5056         if (defined $order && $order !~ m/none|project|descr|owner|age/) {
5057                 die_error(400, "Unknown order parameter");
5058         }
5059
5060         my @list = git_get_projects_list();
5061         if (!@list) {
5062                 die_error(404, "No projects found");
5063         }
5064
5065         git_header_html();
5066         if (defined $home_text && -f $home_text) {
5067                 print "<div class=\"index_include\">\n";
5068                 insert_file($home_text);
5069                 print "</div>\n";
5070         }
5071         print $cgi->startform(-method => "get") .
5072               "<p class=\"projsearch\">Search:\n" .
5073               $cgi->textfield(-name => "s", -value => $searchtext) . "\n" .
5074               "</p>" .
5075               $cgi->end_form() . "\n";
5076         git_project_list_body(\@list, $order);
5077         git_footer_html();
5078 }
5079
5080 sub git_forks {
5081         my $order = $input_params{'order'};
5082         if (defined $order && $order !~ m/none|project|descr|owner|age/) {
5083                 die_error(400, "Unknown order parameter");
5084         }
5085
5086         my @list = git_get_projects_list($project);
5087         if (!@list) {
5088                 die_error(404, "No forks found");
5089         }
5090
5091         git_header_html();
5092         git_print_page_nav('','');
5093         git_print_header_div('summary', "$project forks");
5094         git_project_list_body(\@list, $order);
5095         git_footer_html();
5096 }
5097
5098 sub git_project_index {
5099         my @projects = git_get_projects_list($project);
5100
5101         print $cgi->header(
5102                 -type => 'text/plain',
5103                 -charset => 'utf-8',
5104                 -content_disposition => 'inline; filename="index.aux"');
5105
5106         foreach my $pr (@projects) {
5107                 if (!exists $pr->{'owner'}) {
5108                         $pr->{'owner'} = git_get_project_owner("$pr->{'path'}");
5109                 }
5110
5111                 my ($path, $owner) = ($pr->{'path'}, $pr->{'owner'});
5112                 # quote as in CGI::Util::encode, but keep the slash, and use '+' for ' '
5113                 $path  =~ s/([^a-zA-Z0-9_.\-\/ ])/sprintf("%%%02X", ord($1))/eg;
5114                 $owner =~ s/([^a-zA-Z0-9_.\-\/ ])/sprintf("%%%02X", ord($1))/eg;
5115                 $path  =~ s/ /\+/g;
5116                 $owner =~ s/ /\+/g;
5117
5118                 print "$path $owner\n";
5119         }
5120 }
5121
5122 sub git_summary {
5123         my $descr = git_get_project_description($project) || "none";
5124         my %co = parse_commit("HEAD");
5125         my %cd = %co ? parse_date($co{'committer_epoch'}, $co{'committer_tz'}) : ();
5126         my $head = $co{'id'};
5127         my $remote_heads = gitweb_check_feature('remote_heads');
5128
5129         my $owner = git_get_project_owner($project);
5130
5131         my $refs = git_get_references();
5132         # These get_*_list functions return one more to allow us to see if
5133         # there are more ...
5134         my @taglist  = git_get_tags_list(16);
5135         my @headlist = git_get_heads_list(16);
5136         my @remotelist = $remote_heads ? git_get_heads_list(16, 'remotes') : ();
5137         my @forklist;
5138         my $check_forks = gitweb_check_feature('forks');
5139
5140         if ($check_forks) {
5141                 @forklist = git_get_projects_list($project);
5142         }
5143
5144         git_header_html();
5145         git_print_page_nav('summary','', $head);
5146
5147         print "<div class=\"title\">&nbsp;</div>\n";
5148         print "<table class=\"projects_list\">\n" .
5149               "<tr id=\"metadata_desc\"><td>description</td><td>" . esc_html($descr) . "</td></tr>\n" .
5150               "<tr id=\"metadata_owner\"><td>owner</td><td>" . esc_html($owner) . "</td></tr>\n";
5151         if (defined $cd{'rfc2822'}) {
5152                 print "<tr id=\"metadata_lchange\"><td>last change</td><td>$cd{'rfc2822'}</td></tr>\n";
5153         }
5154
5155         # use per project git URL list in $projectroot/$project/cloneurl
5156         # or make project git URL from git base URL and project name
5157         my $url_tag = "URL";
5158         my @url_list = git_get_project_url_list($project);
5159         @url_list = map { "$_/$project" } @git_base_url_list unless @url_list;
5160         foreach my $git_url (@url_list) {
5161                 next unless $git_url;
5162                 print "<tr class=\"metadata_url\"><td>$url_tag</td><td>$git_url</td></tr>\n";
5163                 $url_tag = "";
5164         }
5165
5166         # Tag cloud
5167         my $show_ctags = gitweb_check_feature('ctags');
5168         if ($show_ctags) {
5169                 my $ctags = git_get_project_ctags($project);
5170                 my $cloud = git_populate_project_tagcloud($ctags);
5171                 print "<tr id=\"metadata_ctags\"><td>Content tags:<br />";
5172                 print "</td>\n<td>" unless %$ctags;
5173                 print "<form action=\"$show_ctags\" method=\"post\"><input type=\"hidden\" name=\"p\" value=\"$project\" />Add: <input type=\"text\" name=\"t\" size=\"8\" /></form>";
5174                 print "</td>\n<td>" if %$ctags;
5175                 print git_show_project_tagcloud($cloud, 48);
5176                 print "</td></tr>";
5177         }
5178
5179         print "</table>\n";
5180
5181         # If XSS prevention is on, we don't include README.html.
5182         # TODO: Allow a readme in some safe format.
5183         if (!$prevent_xss && -s "$projectroot/$project/README.html") {
5184                 print "<div class=\"title\">readme</div>\n" .
5185                       "<div class=\"readme\">\n";
5186                 insert_file("$projectroot/$project/README.html");
5187                 print "\n</div>\n"; # class="readme"
5188         }
5189
5190         # we need to request one more than 16 (0..15) to check if
5191         # those 16 are all
5192         my @commitlist = $head ? parse_commits($head, 17) : ();
5193         if (@commitlist) {
5194                 git_print_header_div('shortlog');
5195                 git_shortlog_body(\@commitlist, 0, 15, $refs,
5196                                   $#commitlist <=  15 ? undef :
5197                                   $cgi->a({-href => href(action=>"shortlog")}, "..."));
5198         }
5199
5200         if (@taglist) {
5201                 git_print_header_div('tags');
5202                 git_tags_body(\@taglist, 0, 15,
5203                               $#taglist <=  15 ? undef :
5204                               $cgi->a({-href => href(action=>"tags")}, "..."));
5205         }
5206
5207         if (@headlist) {
5208                 git_print_header_div('heads');
5209                 git_heads_body(\@headlist, $head, 0, 15,
5210                                $#headlist <= 15 ? undef :
5211                                $cgi->a({-href => href(action=>"heads")}, "..."));
5212         }
5213
5214         if (@remotelist) {
5215                 git_print_header_div('remotes');
5216                 git_heads_body(\@remotelist, $head, 0, 15,
5217                                $#remotelist <= 15 ? undef :
5218                                $cgi->a({-href => href(action=>"remotes")}, "..."));
5219         }
5220
5221         if (@forklist) {
5222                 git_print_header_div('forks');
5223                 git_project_list_body(\@forklist, 'age', 0, 15,
5224                                       $#forklist <= 15 ? undef :
5225                                       $cgi->a({-href => href(action=>"forks")}, "..."),
5226                                       'no_header');
5227         }
5228
5229         git_footer_html();
5230 }
5231
5232 sub git_tag {
5233         my %tag = parse_tag($hash);
5234
5235         if (! %tag) {
5236                 die_error(404, "Unknown tag object");
5237         }
5238
5239         my $head = git_get_head_hash($project);
5240         git_header_html();
5241         git_print_page_nav('','', $head,undef,$head);
5242         git_print_header_div('commit', esc_html($tag{'name'}), $hash);
5243         print "<div class=\"title_text\">\n" .
5244               "<table class=\"object_header\">\n" .
5245               "<tr>\n" .
5246               "<td>object</td>\n" .
5247               "<td>" . $cgi->a({-class => "list", -href => href(action=>$tag{'type'}, hash=>$tag{'object'})},
5248                                $tag{'object'}) . "</td>\n" .
5249               "<td class=\"link\">" . $cgi->a({-href => href(action=>$tag{'type'}, hash=>$tag{'object'})},
5250                                               $tag{'type'}) . "</td>\n" .
5251               "</tr>\n";
5252         if (defined($tag{'author'})) {
5253                 git_print_authorship_rows(\%tag, 'author');
5254         }
5255         print "</table>\n\n" .
5256               "</div>\n";
5257         print "<div class=\"page_body\">";
5258         my $comment = $tag{'comment'};
5259         foreach my $line (@$comment) {
5260                 chomp $line;
5261                 print esc_html($line, -nbsp=>1) . "<br/>\n";
5262         }
5263         print "</div>\n";
5264         git_footer_html();
5265 }
5266
5267 sub git_blame_common {
5268         my $format = shift || 'porcelain';
5269         if ($format eq 'porcelain' && $cgi->param('js')) {
5270                 $format = 'incremental';
5271                 $action = 'blame_incremental'; # for page title etc
5272         }
5273
5274         # permissions
5275         gitweb_check_feature('blame')
5276                 or die_error(403, "Blame view not allowed");
5277
5278         # error checking
5279         die_error(400, "No file name given") unless $file_name;
5280         $hash_base ||= git_get_head_hash($project);
5281         die_error(404, "Couldn't find base commit") unless $hash_base;
5282         my %co = parse_commit($hash_base)
5283                 or die_error(404, "Commit not found");
5284         my $ftype = "blob";
5285         if (!defined $hash) {
5286                 $hash = git_get_hash_by_path($hash_base, $file_name, "blob")
5287                         or die_error(404, "Error looking up file");
5288         } else {
5289                 $ftype = git_get_type($hash);
5290                 if ($ftype !~ "blob") {
5291                         die_error(400, "Object is not a blob");
5292                 }
5293         }
5294
5295         my $fd;
5296         if ($format eq 'incremental') {
5297                 # get file contents (as base)
5298                 open $fd, "-|", git_cmd(), 'cat-file', 'blob', $hash
5299                         or die_error(500, "Open git-cat-file failed");
5300         } elsif ($format eq 'data') {
5301                 # run git-blame --incremental
5302                 open $fd, "-|", git_cmd(), "blame", "--incremental",
5303                         $hash_base, "--", $file_name
5304                         or die_error(500, "Open git-blame --incremental failed");
5305         } else {
5306                 # run git-blame --porcelain
5307                 open $fd, "-|", git_cmd(), "blame", '-p',
5308                         $hash_base, '--', $file_name
5309                         or die_error(500, "Open git-blame --porcelain failed");
5310         }
5311
5312         # incremental blame data returns early
5313         if ($format eq 'data') {
5314                 print $cgi->header(
5315                         -type=>"text/plain", -charset => "utf-8",
5316                         -status=> "200 OK");
5317                 local $| = 1; # output autoflush
5318                 print while <$fd>;
5319                 close $fd
5320                         or print "ERROR $!\n";
5321
5322                 print 'END';
5323                 if (defined $t0 && gitweb_check_feature('timed')) {
5324                         print ' '.
5325                               Time::HiRes::tv_interval($t0, [Time::HiRes::gettimeofday()]).
5326                               ' '.$number_of_git_cmds;
5327                 }
5328                 print "\n";
5329
5330                 return;
5331         }
5332
5333         # page header
5334         git_header_html();
5335         my $formats_nav =
5336                 $cgi->a({-href => href(action=>"blob", -replay=>1)},
5337                         "blob") .
5338                 " | ";
5339         if ($format eq 'incremental') {
5340                 $formats_nav .=
5341                         $cgi->a({-href => href(action=>"blame", javascript=>0, -replay=>1)},
5342                                 "blame") . " (non-incremental)";
5343         } else {
5344                 $formats_nav .=
5345                         $cgi->a({-href => href(action=>"blame_incremental", -replay=>1)},
5346                                 "blame") . " (incremental)";
5347         }
5348         $formats_nav .=
5349                 " | " .
5350                 $cgi->a({-href => href(action=>"history", -replay=>1)},
5351                         "history") .
5352                 " | " .
5353                 $cgi->a({-href => href(action=>$action, file_name=>$file_name)},
5354                         "HEAD");
5355         git_print_page_nav('','', $hash_base,$co{'tree'},$hash_base, $formats_nav);
5356         git_print_header_div('commit', esc_html($co{'title'}), $hash_base);
5357         git_print_page_path($file_name, $ftype, $hash_base);
5358
5359         # page body
5360         if ($format eq 'incremental') {
5361                 print "<noscript>\n<div class=\"error\"><center><b>\n".
5362                       "This page requires JavaScript to run.\n Use ".
5363                       $cgi->a({-href => href(action=>'blame',javascript=>0,-replay=>1)},
5364                               'this page').
5365                       " instead.\n".
5366                       "</b></center></div>\n</noscript>\n";
5367
5368                 print qq!<div id="progress_bar" style="width: 100%; background-color: yellow"></div>\n!;
5369         }
5370
5371         print qq!<div class="page_body">\n!;
5372         print qq!<div id="progress_info">... / ...</div>\n!
5373                 if ($format eq 'incremental');
5374         print qq!<table id="blame_table" class="blame" width="100%">\n!.
5375               #qq!<col width="5.5em" /><col width="2.5em" /><col width="*" />\n!.
5376               qq!<thead>\n!.
5377               qq!<tr><th>Commit</th><th>Line</th><th>Data</th></tr>\n!.
5378               qq!</thead>\n!.
5379               qq!<tbody>\n!;
5380
5381         my @rev_color = qw(light dark);
5382         my $num_colors = scalar(@rev_color);
5383         my $current_color = 0;
5384
5385         if ($format eq 'incremental') {
5386                 my $color_class = $rev_color[$current_color];
5387
5388                 #contents of a file
5389                 my $linenr = 0;
5390         LINE:
5391                 while (my $line = <$fd>) {
5392                         chomp $line;
5393                         $linenr++;
5394
5395                         print qq!<tr id="l$linenr" class="$color_class">!.
5396                               qq!<td class="sha1"><a href=""> </a></td>!.
5397                               qq!<td class="linenr">!.
5398                               qq!<a class="linenr" href="">$linenr</a></td>!;
5399                         print qq!<td class="pre">! . esc_html($line) . "</td>\n";
5400                         print qq!</tr>\n!;
5401                 }
5402
5403         } else { # porcelain, i.e. ordinary blame
5404                 my %metainfo = (); # saves information about commits
5405
5406                 # blame data
5407         LINE:
5408                 while (my $line = <$fd>) {
5409                         chomp $line;
5410                         # the header: <SHA-1> <src lineno> <dst lineno> [<lines in group>]
5411                         # no <lines in group> for subsequent lines in group of lines
5412                         my ($full_rev, $orig_lineno, $lineno, $group_size) =
5413                            ($line =~ /^([0-9a-f]{40}) (\d+) (\d+)(?: (\d+))?$/);
5414                         if (!exists $metainfo{$full_rev}) {
5415                                 $metainfo{$full_rev} = { 'nprevious' => 0 };
5416                         }
5417                         my $meta = $metainfo{$full_rev};
5418                         my $data;
5419                         while ($data = <$fd>) {
5420                                 chomp $data;
5421                                 last if ($data =~ s/^\t//); # contents of line
5422                                 if ($data =~ /^(\S+)(?: (.*))?$/) {
5423                                         $meta->{$1} = $2 unless exists $meta->{$1};
5424                                 }
5425                                 if ($data =~ /^previous /) {
5426                                         $meta->{'nprevious'}++;
5427                                 }
5428                         }
5429                         my $short_rev = substr($full_rev, 0, 8);
5430                         my $author = $meta->{'author'};
5431                         my %date =
5432                                 parse_date($meta->{'author-time'}, $meta->{'author-tz'});
5433                         my $date = $date{'iso-tz'};
5434                         if ($group_size) {
5435                                 $current_color = ($current_color + 1) % $num_colors;
5436                         }
5437                         my $tr_class = $rev_color[$current_color];
5438                         $tr_class .= ' boundary' if (exists $meta->{'boundary'});
5439                         $tr_class .= ' no-previous' if ($meta->{'nprevious'} == 0);
5440                         $tr_class .= ' multiple-previous' if ($meta->{'nprevious'} > 1);
5441                         print "<tr id=\"l$lineno\" class=\"$tr_class\">\n";
5442                         if ($group_size) {
5443                                 print "<td class=\"sha1\"";
5444                                 print " title=\"". esc_html($author) . ", $date\"";
5445                                 print " rowspan=\"$group_size\"" if ($group_size > 1);
5446                                 print ">";
5447                                 print $cgi->a({-href => href(action=>"commit",
5448                                                              hash=>$full_rev,
5449                                                              file_name=>$file_name)},
5450                                               esc_html($short_rev));
5451                                 if ($group_size >= 2) {
5452                                         my @author_initials = ($author =~ /\b([[:upper:]])\B/g);
5453                                         if (@author_initials) {
5454                                                 print "<br />" .
5455                                                       esc_html(join('', @author_initials));
5456                                                 #           or join('.', ...)
5457                                         }
5458                                 }
5459                                 print "</td>\n";
5460                         }
5461                         # 'previous' <sha1 of parent commit> <filename at commit>
5462                         if (exists $meta->{'previous'} &&
5463                             $meta->{'previous'} =~ /^([a-fA-F0-9]{40}) (.*)$/) {
5464                                 $meta->{'parent'} = $1;
5465                                 $meta->{'file_parent'} = unquote($2);
5466                         }
5467                         my $linenr_commit =
5468                                 exists($meta->{'parent'}) ?
5469                                 $meta->{'parent'} : $full_rev;
5470                         my $linenr_filename =
5471                                 exists($meta->{'file_parent'}) ?
5472                                 $meta->{'file_parent'} : unquote($meta->{'filename'});
5473                         my $blamed = href(action => 'blame',
5474                                           file_name => $linenr_filename,
5475                                           hash_base => $linenr_commit);
5476                         print "<td class=\"linenr\">";
5477                         print $cgi->a({ -href => "$blamed#l$orig_lineno",
5478                                         -class => "linenr" },
5479                                       esc_html($lineno));
5480                         print "</td>";
5481                         print "<td class=\"pre\">" . esc_html($data) . "</td>\n";
5482                         print "</tr>\n";
5483                 } # end while
5484
5485         }
5486
5487         # footer
5488         print "</tbody>\n".
5489               "</table>\n"; # class="blame"
5490         print "</div>\n";   # class="blame_body"
5491         close $fd
5492                 or print "Reading blob failed\n";
5493
5494         git_footer_html();
5495 }
5496
5497 sub git_blame {
5498         git_blame_common();
5499 }
5500
5501 sub git_blame_incremental {
5502         git_blame_common('incremental');
5503 }
5504
5505 sub git_blame_data {
5506         git_blame_common('data');
5507 }
5508
5509 sub git_tags {
5510         my $head = git_get_head_hash($project);
5511         git_header_html();
5512         git_print_page_nav('','', $head,undef,$head);
5513         git_print_header_div('summary', $project);
5514
5515         my @tagslist = git_get_tags_list();
5516         if (@tagslist) {
5517                 git_tags_body(\@tagslist);
5518         }
5519         git_footer_html();
5520 }
5521
5522 sub git_heads {
5523         my $head = git_get_head_hash($project);
5524         git_header_html();
5525         git_print_page_nav('','', $head,undef,$head);
5526         git_print_header_div('summary', $project);
5527
5528         my @headslist = git_get_heads_list();
5529         if (@headslist) {
5530                 git_heads_body(\@headslist, $head);
5531         }
5532         git_footer_html();
5533 }
5534
5535 sub git_remotes {
5536         gitweb_check_feature('remote_heads')
5537                 or die_error(403, "Remote heads view is disabled");
5538
5539         my $head = git_get_head_hash($project);
5540         git_header_html();
5541         git_print_page_nav('','', $head,undef,$head);
5542         git_print_header_div('summary', $project);
5543
5544         my @remotelist = git_get_heads_list(undef, 'remotes');
5545         if (@remotelist) {
5546                 git_heads_body(\@remotelist, $head);
5547         }
5548         git_footer_html();
5549 }
5550
5551 sub git_blob_plain {
5552         my $type = shift;
5553         my $expires;
5554
5555         if (!defined $hash) {
5556                 if (defined $file_name) {
5557                         my $base = $hash_base || git_get_head_hash($project);
5558                         $hash = git_get_hash_by_path($base, $file_name, "blob")
5559                                 or die_error(404, "Cannot find file");
5560                 } else {
5561                         die_error(400, "No file name defined");
5562                 }
5563         } elsif ($hash =~ m/^[0-9a-fA-F]{40}$/) {
5564                 # blobs defined by non-textual hash id's can be cached
5565                 $expires = "+1d";
5566         }
5567
5568         open my $fd, "-|", git_cmd(), "cat-file", "blob", $hash
5569                 or die_error(500, "Open git-cat-file blob '$hash' failed");
5570
5571         # content-type (can include charset)
5572         $type = blob_contenttype($fd, $file_name, $type);
5573
5574         # "save as" filename, even when no $file_name is given
5575         my $save_as = "$hash";
5576         if (defined $file_name) {
5577                 $save_as = $file_name;
5578         } elsif ($type =~ m/^text\//) {
5579                 $save_as .= '.txt';
5580         }
5581
5582         # With XSS prevention on, blobs of all types except a few known safe
5583         # ones are served with "Content-Disposition: attachment" to make sure
5584         # they don't run in our security domain.  For certain image types,
5585         # blob view writes an <img> tag referring to blob_plain view, and we
5586         # want to be sure not to break that by serving the image as an
5587         # attachment (though Firefox 3 doesn't seem to care).
5588         my $sandbox = $prevent_xss &&
5589                 $type !~ m!^(?:text/plain|image/(?:gif|png|jpeg))$!;
5590
5591         print $cgi->header(
5592                 -type => $type,
5593                 -expires => $expires,
5594                 -content_disposition =>
5595                         ($sandbox ? 'attachment' : 'inline')
5596                         . '; filename="' . $save_as . '"');
5597         local $/ = undef;
5598         binmode STDOUT, ':raw';
5599         print <$fd>;
5600         binmode STDOUT, ':utf8'; # as set at the beginning of gitweb.cgi
5601         close $fd;
5602 }
5603
5604 sub git_blob {
5605         my $expires;
5606
5607         if (!defined $hash) {
5608                 if (defined $file_name) {
5609                         my $base = $hash_base || git_get_head_hash($project);
5610                         $hash = git_get_hash_by_path($base, $file_name, "blob")
5611                                 or die_error(404, "Cannot find file");
5612                 } else {
5613                         die_error(400, "No file name defined");
5614                 }
5615         } elsif ($hash =~ m/^[0-9a-fA-F]{40}$/) {
5616                 # blobs defined by non-textual hash id's can be cached
5617                 $expires = "+1d";
5618         }
5619
5620         my $have_blame = gitweb_check_feature('blame');
5621         open my $fd, "-|", git_cmd(), "cat-file", "blob", $hash
5622                 or die_error(500, "Couldn't cat $file_name, $hash");
5623         my $mimetype = blob_mimetype($fd, $file_name);
5624         # use 'blob_plain' (aka 'raw') view for files that cannot be displayed
5625         if ($mimetype !~ m!^(?:text/|image/(?:gif|png|jpeg)$)! && -B $fd) {
5626                 close $fd;
5627                 return git_blob_plain($mimetype);
5628         }
5629         # we can have blame only for text/* mimetype
5630         $have_blame &&= ($mimetype =~ m!^text/!);
5631
5632         my $highlight = gitweb_check_feature('highlight');
5633         my $syntax = guess_file_syntax($highlight, $mimetype, $file_name);
5634         $fd = run_highlighter($fd, $highlight, $syntax)
5635                 if $syntax;
5636
5637         git_header_html(undef, $expires);
5638         my $formats_nav = '';
5639         if (defined $hash_base && (my %co = parse_commit($hash_base))) {
5640                 if (defined $file_name) {
5641                         if ($have_blame) {
5642                                 $formats_nav .=
5643                                         $cgi->a({-href => href(action=>"blame", -replay=>1)},
5644                                                 "blame") .
5645                                         " | ";
5646                         }
5647                         $formats_nav .=
5648                                 $cgi->a({-href => href(action=>"history", -replay=>1)},
5649                                         "history") .
5650                                 " | " .
5651                                 $cgi->a({-href => href(action=>"blob_plain", -replay=>1)},
5652                                         "raw") .
5653                                 " | " .
5654                                 $cgi->a({-href => href(action=>"blob",
5655                                                        hash_base=>"HEAD", file_name=>$file_name)},
5656                                         "HEAD");
5657                 } else {
5658                         $formats_nav .=
5659                                 $cgi->a({-href => href(action=>"blob_plain", -replay=>1)},
5660                                         "raw");
5661                 }
5662                 git_print_page_nav('','', $hash_base,$co{'tree'},$hash_base, $formats_nav);
5663                 git_print_header_div('commit', esc_html($co{'title'}), $hash_base);
5664         } else {
5665                 print "<div class=\"page_nav\">\n" .
5666                       "<br/><br/></div>\n" .
5667                       "<div class=\"title\">$hash</div>\n";
5668         }
5669         git_print_page_path($file_name, "blob", $hash_base);
5670         print "<div class=\"page_body\">\n";
5671         if ($mimetype =~ m!^image/!) {
5672                 print qq!<img type="$mimetype"!;
5673                 if ($file_name) {
5674                         print qq! alt="$file_name" title="$file_name"!;
5675                 }
5676                 print qq! src="! .
5677                       href(action=>"blob_plain", hash=>$hash,
5678                            hash_base=>$hash_base, file_name=>$file_name) .
5679                       qq!" />\n!;
5680         } else {
5681                 my $nr;
5682                 while (my $line = <$fd>) {
5683                         chomp $line;
5684                         $nr++;
5685                         $line = untabify($line);
5686                         printf qq!<div class="pre"><a id="l%i" href="%s#l%i" class="linenr">%4i</a> %s</div>\n!,
5687                                $nr, href(-replay => 1), $nr, $nr, $syntax ? $line : esc_html($line, -nbsp=>1);
5688                 }
5689         }
5690         close $fd
5691                 or print "Reading blob failed.\n";
5692         print "</div>";
5693         git_footer_html();
5694 }
5695
5696 sub git_tree {
5697         if (!defined $hash_base) {
5698                 $hash_base = "HEAD";
5699         }
5700         if (!defined $hash) {
5701                 if (defined $file_name) {
5702                         $hash = git_get_hash_by_path($hash_base, $file_name, "tree");
5703                 } else {
5704                         $hash = $hash_base;
5705                 }
5706         }
5707         die_error(404, "No such tree") unless defined($hash);
5708
5709         my $show_sizes = gitweb_check_feature('show-sizes');
5710         my $have_blame = gitweb_check_feature('blame');
5711
5712         my @entries = ();
5713         {
5714                 local $/ = "\0";
5715                 open my $fd, "-|", git_cmd(), "ls-tree", '-z',
5716                         ($show_sizes ? '-l' : ()), @extra_options, $hash
5717                         or die_error(500, "Open git-ls-tree failed");
5718                 @entries = map { chomp; $_ } <$fd>;
5719                 close $fd
5720                         or die_error(404, "Reading tree failed");
5721         }
5722
5723         my $refs = git_get_references();
5724         my $ref = format_ref_marker($refs, $hash_base);
5725         git_header_html();
5726         my $basedir = '';
5727         if (defined $hash_base && (my %co = parse_commit($hash_base))) {
5728                 my @views_nav = ();
5729                 if (defined $file_name) {
5730                         push @views_nav,
5731                                 $cgi->a({-href => href(action=>"history", -replay=>1)},
5732                                         "history"),
5733                                 $cgi->a({-href => href(action=>"tree",
5734                                                        hash_base=>"HEAD", file_name=>$file_name)},
5735                                         "HEAD"),
5736                 }
5737                 my $snapshot_links = format_snapshot_links($hash);
5738                 if (defined $snapshot_links) {
5739                         # FIXME: Should be available when we have no hash base as well.
5740                         push @views_nav, $snapshot_links;
5741                 }
5742                 git_print_page_nav('tree','', $hash_base, undef, undef,
5743                                    join(' | ', @views_nav));
5744                 git_print_header_div('commit', esc_html($co{'title'}) . $ref, $hash_base);
5745         } else {
5746                 undef $hash_base;
5747                 print "<div class=\"page_nav\">\n";
5748                 print "<br/><br/></div>\n";
5749                 print "<div class=\"title\">$hash</div>\n";
5750         }
5751         if (defined $file_name) {
5752                 $basedir = $file_name;
5753                 if ($basedir ne '' && substr($basedir, -1) ne '/') {
5754                         $basedir .= '/';
5755                 }
5756                 git_print_page_path($file_name, 'tree', $hash_base);
5757         }
5758         print "<div class=\"page_body\">\n";
5759         print "<table class=\"tree\">\n";
5760         my $alternate = 1;
5761         # '..' (top directory) link if possible
5762         if (defined $hash_base &&
5763             defined $file_name && $file_name =~ m![^/]+$!) {
5764                 if ($alternate) {
5765                         print "<tr class=\"dark\">\n";
5766                 } else {
5767                         print "<tr class=\"light\">\n";
5768                 }
5769                 $alternate ^= 1;
5770
5771                 my $up = $file_name;
5772                 $up =~ s!/?[^/]+$!!;
5773                 undef $up unless $up;
5774                 # based on git_print_tree_entry
5775                 print '<td class="mode">' . mode_str('040000') . "</td>\n";
5776                 print '<td class="size">&nbsp;</td>'."\n" if $show_sizes;
5777                 print '<td class="list">';
5778                 print $cgi->a({-href => href(action=>"tree",
5779                                              hash_base=>$hash_base,
5780                                              file_name=>$up)},
5781                               "..");
5782                 print "</td>\n";
5783                 print "<td class=\"link\"></td>\n";
5784
5785                 print "</tr>\n";
5786         }
5787         foreach my $line (@entries) {
5788                 my %t = parse_ls_tree_line($line, -z => 1, -l => $show_sizes);
5789
5790                 if ($alternate) {
5791                         print "<tr class=\"dark\">\n";
5792                 } else {
5793                         print "<tr class=\"light\">\n";
5794                 }
5795                 $alternate ^= 1;
5796
5797                 git_print_tree_entry(\%t, $basedir, $hash_base, $have_blame);
5798
5799                 print "</tr>\n";
5800         }
5801         print "</table>\n" .
5802               "</div>";
5803         git_footer_html();
5804 }
5805
5806 sub snapshot_name {
5807         my ($project, $hash) = @_;
5808
5809         # path/to/project.git  -> project
5810         # path/to/project/.git -> project
5811         my $name = to_utf8($project);
5812         $name =~ s,([^/])/*\.git$,$1,;
5813         $name = basename($name);
5814         # sanitize name
5815         $name =~ s/[[:cntrl:]]/?/g;
5816
5817         my $ver = $hash;
5818         if ($hash =~ /^[0-9a-fA-F]+$/) {
5819                 # shorten SHA-1 hash
5820                 my $full_hash = git_get_full_hash($project, $hash);
5821                 if ($full_hash =~ /^$hash/ && length($hash) > 7) {
5822                         $ver = git_get_short_hash($project, $hash);
5823                 }
5824         } elsif ($hash =~ m!^refs/tags/(.*)$!) {
5825                 # tags don't need shortened SHA-1 hash
5826                 $ver = $1;
5827         } else {
5828                 # branches and other need shortened SHA-1 hash
5829                 if ($hash =~ m!^refs/(?:heads|remotes)/(.*)$!) {
5830                         $ver = $1;
5831                 }
5832                 $ver .= '-' . git_get_short_hash($project, $hash);
5833         }
5834         # in case of hierarchical branch names
5835         $ver =~ s!/!.!g;
5836
5837         # name = project-version_string
5838         $name = "$name-$ver";
5839
5840         return wantarray ? ($name, $name) : $name;
5841 }
5842
5843 sub git_snapshot {
5844         my $format = $input_params{'snapshot_format'};
5845         if (!@snapshot_fmts) {
5846                 die_error(403, "Snapshots not allowed");
5847         }
5848         # default to first supported snapshot format
5849         $format ||= $snapshot_fmts[0];
5850         if ($format !~ m/^[a-z0-9]+$/) {
5851                 die_error(400, "Invalid snapshot format parameter");
5852         } elsif (!exists($known_snapshot_formats{$format})) {
5853                 die_error(400, "Unknown snapshot format");
5854         } elsif ($known_snapshot_formats{$format}{'disabled'}) {
5855                 die_error(403, "Snapshot format not allowed");
5856         } elsif (!grep($_ eq $format, @snapshot_fmts)) {
5857                 die_error(403, "Unsupported snapshot format");
5858         }
5859
5860         my $type = git_get_type("$hash^{}");
5861         if (!$type) {
5862                 die_error(404, 'Object does not exist');
5863         }  elsif ($type eq 'blob') {
5864                 die_error(400, 'Object is not a tree-ish');
5865         }
5866
5867         my ($name, $prefix) = snapshot_name($project, $hash);
5868         my $filename = "$name$known_snapshot_formats{$format}{'suffix'}";
5869         my $cmd = quote_command(
5870                 git_cmd(), 'archive',
5871                 "--format=$known_snapshot_formats{$format}{'format'}",
5872                 "--prefix=$prefix/", $hash);
5873         if (exists $known_snapshot_formats{$format}{'compressor'}) {
5874                 $cmd .= ' | ' . quote_command(@{$known_snapshot_formats{$format}{'compressor'}});
5875         }
5876
5877         $filename =~ s/(["\\])/\\$1/g;
5878         print $cgi->header(
5879                 -type => $known_snapshot_formats{$format}{'type'},
5880                 -content_disposition => 'inline; filename="' . $filename . '"',
5881                 -status => '200 OK');
5882
5883         open my $fd, "-|", $cmd
5884                 or die_error(500, "Execute git-archive failed");
5885         binmode STDOUT, ':raw';
5886         print <$fd>;
5887         binmode STDOUT, ':utf8'; # as set at the beginning of gitweb.cgi
5888         close $fd;
5889 }
5890
5891 sub git_log_generic {
5892         my ($fmt_name, $body_subr, $base, $parent, $file_name, $file_hash) = @_;
5893
5894         my $head = git_get_head_hash($project);
5895         if (!defined $base) {
5896                 $base = $head;
5897         }
5898         if (!defined $page) {
5899                 $page = 0;
5900         }
5901         my $refs = git_get_references();
5902
5903         my $commit_hash = $base;
5904         if (defined $parent) {
5905                 $commit_hash = "$parent..$base";
5906         }
5907         my @commitlist =
5908                 parse_commits($commit_hash, 101, (100 * $page),
5909                               defined $file_name ? ($file_name, "--full-history") : ());
5910
5911         my $ftype;
5912         if (!defined $file_hash && defined $file_name) {
5913                 # some commits could have deleted file in question,
5914                 # and not have it in tree, but one of them has to have it
5915                 for (my $i = 0; $i < @commitlist; $i++) {
5916                         $file_hash = git_get_hash_by_path($commitlist[$i]{'id'}, $file_name);
5917                         last if defined $file_hash;
5918                 }
5919         }
5920         if (defined $file_hash) {
5921                 $ftype = git_get_type($file_hash);
5922         }
5923         if (defined $file_name && !defined $ftype) {
5924                 die_error(500, "Unknown type of object");
5925         }
5926         my %co;
5927         if (defined $file_name) {
5928                 %co = parse_commit($base)
5929                         or die_error(404, "Unknown commit object");
5930         }
5931
5932
5933         my $paging_nav = format_paging_nav($fmt_name, $page, $#commitlist >= 100);
5934         my $next_link = '';
5935         if ($#commitlist >= 100) {
5936                 $next_link =
5937                         $cgi->a({-href => href(-replay=>1, page=>$page+1),
5938                                  -accesskey => "n", -title => "Alt-n"}, "next");
5939         }
5940         my $patch_max = gitweb_get_feature('patches');
5941         if ($patch_max && !defined $file_name) {
5942                 if ($patch_max < 0 || @commitlist <= $patch_max) {
5943                         $paging_nav .= " &sdot; " .
5944                                 $cgi->a({-href => href(action=>"patches", -replay=>1)},
5945                                         "patches");
5946                 }
5947         }
5948
5949         git_header_html();
5950         git_print_page_nav($fmt_name,'', $hash,$hash,$hash, $paging_nav);
5951         if (defined $file_name) {
5952                 git_print_header_div('commit', esc_html($co{'title'}), $base);
5953         } else {
5954                 git_print_header_div('summary', $project)
5955         }
5956         git_print_page_path($file_name, $ftype, $hash_base)
5957                 if (defined $file_name);
5958
5959         $body_subr->(\@commitlist, 0, 99, $refs, $next_link,
5960                      $file_name, $file_hash, $ftype);
5961
5962         git_footer_html();
5963 }
5964
5965 sub git_log {
5966         git_log_generic('log', \&git_log_body,
5967                         $hash, $hash_parent);
5968 }
5969
5970 sub git_commit {
5971         $hash ||= $hash_base || "HEAD";
5972         my %co = parse_commit($hash)
5973             or die_error(404, "Unknown commit object");
5974
5975         my $parent  = $co{'parent'};
5976         my $parents = $co{'parents'}; # listref
5977
5978         # we need to prepare $formats_nav before any parameter munging
5979         my $formats_nav;
5980         if (!defined $parent) {
5981                 # --root commitdiff
5982                 $formats_nav .= '(initial)';
5983         } elsif (@$parents == 1) {
5984                 # single parent commit
5985                 $formats_nav .=
5986                         '(parent: ' .
5987                         $cgi->a({-href => href(action=>"commit",
5988                                                hash=>$parent)},
5989                                 esc_html(substr($parent, 0, 7))) .
5990                         ')';
5991         } else {
5992                 # merge commit
5993                 $formats_nav .=
5994                         '(merge: ' .
5995                         join(' ', map {
5996                                 $cgi->a({-href => href(action=>"commit",
5997                                                        hash=>$_)},
5998                                         esc_html(substr($_, 0, 7)));
5999                         } @$parents ) .
6000                         ')';
6001         }
6002         if (gitweb_check_feature('patches') && @$parents <= 1) {
6003                 $formats_nav .= " | " .
6004                         $cgi->a({-href => href(action=>"patch", -replay=>1)},
6005                                 "patch");
6006         }
6007
6008         if (!defined $parent) {
6009                 $parent = "--root";
6010         }
6011         my @difftree;
6012         open my $fd, "-|", git_cmd(), "diff-tree", '-r', "--no-commit-id",
6013                 @diff_opts,
6014                 (@$parents <= 1 ? $parent : '-c'),
6015                 $hash, "--"
6016                 or die_error(500, "Open git-diff-tree failed");
6017         @difftree = map { chomp; $_ } <$fd>;
6018         close $fd or die_error(404, "Reading git-diff-tree failed");
6019
6020         # non-textual hash id's can be cached
6021         my $expires;
6022         if ($hash =~ m/^[0-9a-fA-F]{40}$/) {
6023                 $expires = "+1d";
6024         }
6025         my $refs = git_get_references();
6026         my $ref = format_ref_marker($refs, $co{'id'});
6027
6028         git_header_html(undef, $expires);
6029         git_print_page_nav('commit', '',
6030                            $hash, $co{'tree'}, $hash,
6031                            $formats_nav);
6032
6033         if (defined $co{'parent'}) {
6034                 git_print_header_div('commitdiff', esc_html($co{'title'}) . $ref, $hash);
6035         } else {
6036                 git_print_header_div('tree', esc_html($co{'title'}) . $ref, $co{'tree'}, $hash);
6037         }
6038         print "<div class=\"title_text\">\n" .
6039               "<table class=\"object_header\">\n";
6040         git_print_authorship_rows(\%co);
6041         print "<tr><td>commit</td><td class=\"sha1\">$co{'id'}</td></tr>\n";
6042         print "<tr>" .
6043               "<td>tree</td>" .
6044               "<td class=\"sha1\">" .
6045               $cgi->a({-href => href(action=>"tree", hash=>$co{'tree'}, hash_base=>$hash),
6046                        class => "list"}, $co{'tree'}) .
6047               "</td>" .
6048               "<td class=\"link\">" .
6049               $cgi->a({-href => href(action=>"tree", hash=>$co{'tree'}, hash_base=>$hash)},
6050                       "tree");
6051         my $snapshot_links = format_snapshot_links($hash);
6052         if (defined $snapshot_links) {
6053                 print " | " . $snapshot_links;
6054         }
6055         print "</td>" .
6056               "</tr>\n";
6057
6058         foreach my $par (@$parents) {
6059                 print "<tr>" .
6060                       "<td>parent</td>" .
6061                       "<td class=\"sha1\">" .
6062                       $cgi->a({-href => href(action=>"commit", hash=>$par),
6063                                class => "list"}, $par) .
6064                       "</td>" .
6065                       "<td class=\"link\">" .
6066                       $cgi->a({-href => href(action=>"commit", hash=>$par)}, "commit") .
6067                       " | " .
6068                       $cgi->a({-href => href(action=>"commitdiff", hash=>$hash, hash_parent=>$par)}, "diff") .
6069                       "</td>" .
6070                       "</tr>\n";
6071         }
6072         print "</table>".
6073               "</div>\n";
6074
6075         print "<div class=\"page_body\">\n";
6076         git_print_log($co{'comment'});
6077         print "</div>\n";
6078
6079         git_difftree_body(\@difftree, $hash, @$parents);
6080
6081         git_footer_html();
6082 }
6083
6084 sub git_object {
6085         # object is defined by:
6086         # - hash or hash_base alone
6087         # - hash_base and file_name
6088         my $type;
6089
6090         # - hash or hash_base alone
6091         if ($hash || ($hash_base && !defined $file_name)) {
6092                 my $object_id = $hash || $hash_base;
6093
6094                 open my $fd, "-|", quote_command(
6095                         git_cmd(), 'cat-file', '-t', $object_id) . ' 2> /dev/null'
6096                         or die_error(404, "Object does not exist");
6097                 $type = <$fd>;
6098                 chomp $type;
6099                 close $fd
6100                         or die_error(404, "Object does not exist");
6101
6102         # - hash_base and file_name
6103         } elsif ($hash_base && defined $file_name) {
6104                 $file_name =~ s,/+$,,;
6105
6106                 system(git_cmd(), "cat-file", '-e', $hash_base) == 0
6107                         or die_error(404, "Base object does not exist");
6108
6109                 # here errors should not hapen
6110                 open my $fd, "-|", git_cmd(), "ls-tree", $hash_base, "--", $file_name
6111                         or die_error(500, "Open git-ls-tree failed");
6112                 my $line = <$fd>;
6113                 close $fd;
6114
6115                 #'100644 blob 0fa3f3a66fb6a137f6ec2c19351ed4d807070ffa  panic.c'
6116                 unless ($line && $line =~ m/^([0-9]+) (.+) ([0-9a-fA-F]{40})\t/) {
6117                         die_error(404, "File or directory for given base does not exist");
6118                 }
6119                 $type = $2;
6120                 $hash = $3;
6121         } else {
6122                 die_error(400, "Not enough information to find object");
6123         }
6124
6125         print $cgi->redirect(-uri => href(action=>$type, -full=>1,
6126                                           hash=>$hash, hash_base=>$hash_base,
6127                                           file_name=>$file_name),
6128                              -status => '302 Found');
6129 }
6130
6131 sub git_blobdiff {
6132         my $format = shift || 'html';
6133
6134         my $fd;
6135         my @difftree;
6136         my %diffinfo;
6137         my $expires;
6138
6139         # preparing $fd and %diffinfo for git_patchset_body
6140         # new style URI
6141         if (defined $hash_base && defined $hash_parent_base) {
6142                 if (defined $file_name) {
6143                         # read raw output
6144                         open $fd, "-|", git_cmd(), "diff-tree", '-r', @diff_opts,
6145                                 $hash_parent_base, $hash_base,
6146                                 "--", (defined $file_parent ? $file_parent : ()), $file_name
6147                                 or die_error(500, "Open git-diff-tree failed");
6148                         @difftree = map { chomp; $_ } <$fd>;
6149                         close $fd
6150                                 or die_error(404, "Reading git-diff-tree failed");
6151                         @difftree
6152                                 or die_error(404, "Blob diff not found");
6153
6154                 } elsif (defined $hash &&
6155                          $hash =~ /[0-9a-fA-F]{40}/) {
6156                         # try to find filename from $hash
6157
6158                         # read filtered raw output
6159                         open $fd, "-|", git_cmd(), "diff-tree", '-r', @diff_opts,
6160                                 $hash_parent_base, $hash_base, "--"
6161                                 or die_error(500, "Open git-diff-tree failed");
6162                         @difftree =
6163                                 # ':100644 100644 03b21826... 3b93d5e7... M     ls-files.c'
6164                                 # $hash == to_id
6165                                 grep { /^:[0-7]{6} [0-7]{6} [0-9a-fA-F]{40} $hash/ }
6166                                 map { chomp; $_ } <$fd>;
6167                         close $fd
6168                                 or die_error(404, "Reading git-diff-tree failed");
6169                         @difftree
6170                                 or die_error(404, "Blob diff not found");
6171
6172                 } else {
6173                         die_error(400, "Missing one of the blob diff parameters");
6174                 }
6175
6176                 if (@difftree > 1) {
6177                         die_error(400, "Ambiguous blob diff specification");
6178                 }
6179
6180                 %diffinfo = parse_difftree_raw_line($difftree[0]);
6181                 $file_parent ||= $diffinfo{'from_file'} || $file_name;
6182                 $file_name   ||= $diffinfo{'to_file'};
6183
6184                 $hash_parent ||= $diffinfo{'from_id'};
6185                 $hash        ||= $diffinfo{'to_id'};
6186
6187                 # non-textual hash id's can be cached
6188                 if ($hash_base =~ m/^[0-9a-fA-F]{40}$/ &&
6189                     $hash_parent_base =~ m/^[0-9a-fA-F]{40}$/) {
6190                         $expires = '+1d';
6191                 }
6192
6193                 # open patch output
6194                 open $fd, "-|", git_cmd(), "diff-tree", '-r', @diff_opts,
6195                         '-p', ($format eq 'html' ? "--full-index" : ()),
6196                         $hash_parent_base, $hash_base,
6197                         "--", (defined $file_parent ? $file_parent : ()), $file_name
6198                         or die_error(500, "Open git-diff-tree failed");
6199         }
6200
6201         # old/legacy style URI -- not generated anymore since 1.4.3.
6202         if (!%diffinfo) {
6203                 die_error('404 Not Found', "Missing one of the blob diff parameters")
6204         }
6205
6206         # header
6207         if ($format eq 'html') {
6208                 my $formats_nav =
6209                         $cgi->a({-href => href(action=>"blobdiff_plain", -replay=>1)},
6210                                 "raw");
6211                 git_header_html(undef, $expires);
6212                 if (defined $hash_base && (my %co = parse_commit($hash_base))) {
6213                         git_print_page_nav('','', $hash_base,$co{'tree'},$hash_base, $formats_nav);
6214                         git_print_header_div('commit', esc_html($co{'title'}), $hash_base);
6215                 } else {
6216                         print "<div class=\"page_nav\"><br/>$formats_nav<br/></div>\n";
6217                         print "<div class=\"title\">$hash vs $hash_parent</div>\n";
6218                 }
6219                 if (defined $file_name) {
6220                         git_print_page_path($file_name, "blob", $hash_base);
6221                 } else {
6222                         print "<div class=\"page_path\"></div>\n";
6223                 }
6224
6225         } elsif ($format eq 'plain') {
6226                 print $cgi->header(
6227                         -type => 'text/plain',
6228                         -charset => 'utf-8',
6229                         -expires => $expires,
6230                         -content_disposition => 'inline; filename="' . "$file_name" . '.patch"');
6231
6232                 print "X-Git-Url: " . $cgi->self_url() . "\n\n";
6233
6234         } else {
6235                 die_error(400, "Unknown blobdiff format");
6236         }
6237
6238         # patch
6239         if ($format eq 'html') {
6240                 print "<div class=\"page_body\">\n";
6241
6242                 git_patchset_body($fd, [ \%diffinfo ], $hash_base, $hash_parent_base);
6243                 close $fd;
6244
6245                 print "</div>\n"; # class="page_body"
6246                 git_footer_html();
6247
6248         } else {
6249                 while (my $line = <$fd>) {
6250                         $line =~ s!a/($hash|$hash_parent)!'a/'.esc_path($diffinfo{'from_file'})!eg;
6251                         $line =~ s!b/($hash|$hash_parent)!'b/'.esc_path($diffinfo{'to_file'})!eg;
6252
6253                         print $line;
6254
6255                         last if $line =~ m!^\+\+\+!;
6256                 }
6257                 local $/ = undef;
6258                 print <$fd>;
6259                 close $fd;
6260         }
6261 }
6262
6263 sub git_blobdiff_plain {
6264         git_blobdiff('plain');
6265 }
6266
6267 sub git_commitdiff {
6268         my %params = @_;
6269         my $format = $params{-format} || 'html';
6270
6271         my ($patch_max) = gitweb_get_feature('patches');
6272         if ($format eq 'patch') {
6273                 die_error(403, "Patch view not allowed") unless $patch_max;
6274         }
6275
6276         $hash ||= $hash_base || "HEAD";
6277         my %co = parse_commit($hash)
6278             or die_error(404, "Unknown commit object");
6279
6280         # choose format for commitdiff for merge
6281         if (! defined $hash_parent && @{$co{'parents'}} > 1) {
6282                 $hash_parent = '--cc';
6283         }
6284         # we need to prepare $formats_nav before almost any parameter munging
6285         my $formats_nav;
6286         if ($format eq 'html') {
6287                 $formats_nav =
6288                         $cgi->a({-href => href(action=>"commitdiff_plain", -replay=>1)},
6289                                 "raw");
6290                 if ($patch_max && @{$co{'parents'}} <= 1) {
6291                         $formats_nav .= " | " .
6292                                 $cgi->a({-href => href(action=>"patch", -replay=>1)},
6293                                         "patch");
6294                 }
6295
6296                 if (defined $hash_parent &&
6297                     $hash_parent ne '-c' && $hash_parent ne '--cc') {
6298                         # commitdiff with two commits given
6299                         my $hash_parent_short = $hash_parent;
6300                         if ($hash_parent =~ m/^[0-9a-fA-F]{40}$/) {
6301                                 $hash_parent_short = substr($hash_parent, 0, 7);
6302                         }
6303                         $formats_nav .=
6304                                 ' (from';
6305                         for (my $i = 0; $i < @{$co{'parents'}}; $i++) {
6306                                 if ($co{'parents'}[$i] eq $hash_parent) {
6307                                         $formats_nav .= ' parent ' . ($i+1);
6308                                         last;
6309                                 }
6310                         }
6311                         $formats_nav .= ': ' .
6312                                 $cgi->a({-href => href(action=>"commitdiff",
6313                                                        hash=>$hash_parent)},
6314                                         esc_html($hash_parent_short)) .
6315                                 ')';
6316                 } elsif (!$co{'parent'}) {
6317                         # --root commitdiff
6318                         $formats_nav .= ' (initial)';
6319                 } elsif (scalar @{$co{'parents'}} == 1) {
6320                         # single parent commit
6321                         $formats_nav .=
6322                                 ' (parent: ' .
6323                                 $cgi->a({-href => href(action=>"commitdiff",
6324                                                        hash=>$co{'parent'})},
6325                                         esc_html(substr($co{'parent'}, 0, 7))) .
6326                                 ')';
6327                 } else {
6328                         # merge commit
6329                         if ($hash_parent eq '--cc') {
6330                                 $formats_nav .= ' | ' .
6331                                         $cgi->a({-href => href(action=>"commitdiff",
6332                                                                hash=>$hash, hash_parent=>'-c')},
6333                                                 'combined');
6334                         } else { # $hash_parent eq '-c'
6335                                 $formats_nav .= ' | ' .
6336                                         $cgi->a({-href => href(action=>"commitdiff",
6337                                                                hash=>$hash, hash_parent=>'--cc')},
6338                                                 'compact');
6339                         }
6340                         $formats_nav .=
6341                                 ' (merge: ' .
6342                                 join(' ', map {
6343                                         $cgi->a({-href => href(action=>"commitdiff",
6344                                                                hash=>$_)},
6345                                                 esc_html(substr($_, 0, 7)));
6346                                 } @{$co{'parents'}} ) .
6347                                 ')';
6348                 }
6349         }
6350
6351         my $hash_parent_param = $hash_parent;
6352         if (!defined $hash_parent_param) {
6353                 # --cc for multiple parents, --root for parentless
6354                 $hash_parent_param =
6355                         @{$co{'parents'}} > 1 ? '--cc' : $co{'parent'} || '--root';
6356         }
6357
6358         # read commitdiff
6359         my $fd;
6360         my @difftree;
6361         if ($format eq 'html') {
6362                 open $fd, "-|", git_cmd(), "diff-tree", '-r', @diff_opts,
6363                         "--no-commit-id", "--patch-with-raw", "--full-index",
6364                         $hash_parent_param, $hash, "--"
6365                         or die_error(500, "Open git-diff-tree failed");
6366
6367                 while (my $line = <$fd>) {
6368                         chomp $line;
6369                         # empty line ends raw part of diff-tree output
6370                         last unless $line;
6371                         push @difftree, scalar parse_difftree_raw_line($line);
6372                 }
6373
6374         } elsif ($format eq 'plain') {
6375                 open $fd, "-|", git_cmd(), "diff-tree", '-r', @diff_opts,
6376                         '-p', $hash_parent_param, $hash, "--"
6377                         or die_error(500, "Open git-diff-tree failed");
6378         } elsif ($format eq 'patch') {
6379                 # For commit ranges, we limit the output to the number of
6380                 # patches specified in the 'patches' feature.
6381                 # For single commits, we limit the output to a single patch,
6382                 # diverging from the git-format-patch default.
6383                 my @commit_spec = ();
6384                 if ($hash_parent) {
6385                         if ($patch_max > 0) {
6386                                 push @commit_spec, "-$patch_max";
6387                         }
6388                         push @commit_spec, '-n', "$hash_parent..$hash";
6389                 } else {
6390                         if ($params{-single}) {
6391                                 push @commit_spec, '-1';
6392                         } else {
6393                                 if ($patch_max > 0) {
6394                                         push @commit_spec, "-$patch_max";
6395                                 }
6396                                 push @commit_spec, "-n";
6397                         }
6398                         push @commit_spec, '--root', $hash;
6399                 }
6400                 open $fd, "-|", git_cmd(), "format-patch", @diff_opts,
6401                         '--encoding=utf8', '--stdout', @commit_spec
6402                         or die_error(500, "Open git-format-patch failed");
6403         } else {
6404                 die_error(400, "Unknown commitdiff format");
6405         }
6406
6407         # non-textual hash id's can be cached
6408         my $expires;
6409         if ($hash =~ m/^[0-9a-fA-F]{40}$/) {
6410                 $expires = "+1d";
6411         }
6412
6413         # write commit message
6414         if ($format eq 'html') {
6415                 my $refs = git_get_references();
6416                 my $ref = format_ref_marker($refs, $co{'id'});
6417
6418                 git_header_html(undef, $expires);
6419                 git_print_page_nav('commitdiff','', $hash,$co{'tree'},$hash, $formats_nav);
6420                 git_print_header_div('commit', esc_html($co{'title'}) . $ref, $hash);
6421                 print "<div class=\"title_text\">\n" .
6422                       "<table class=\"object_header\">\n";
6423                 git_print_authorship_rows(\%co);
6424                 print "</table>".
6425                       "</div>\n";
6426                 print "<div class=\"page_body\">\n";
6427                 if (@{$co{'comment'}} > 1) {
6428                         print "<div class=\"log\">\n";
6429                         git_print_log($co{'comment'}, -final_empty_line=> 1, -remove_title => 1);
6430                         print "</div>\n"; # class="log"
6431                 }
6432
6433         } elsif ($format eq 'plain') {
6434                 my $refs = git_get_references("tags");
6435                 my $tagname = git_get_rev_name_tags($hash);
6436                 my $filename = basename($project) . "-$hash.patch";
6437
6438                 print $cgi->header(
6439                         -type => 'text/plain',
6440                         -charset => 'utf-8',
6441                         -expires => $expires,
6442                         -content_disposition => 'inline; filename="' . "$filename" . '"');
6443                 my %ad = parse_date($co{'author_epoch'}, $co{'author_tz'});
6444                 print "From: " . to_utf8($co{'author'}) . "\n";
6445                 print "Date: $ad{'rfc2822'} ($ad{'tz_local'})\n";
6446                 print "Subject: " . to_utf8($co{'title'}) . "\n";
6447
6448                 print "X-Git-Tag: $tagname\n" if $tagname;
6449                 print "X-Git-Url: " . $cgi->self_url() . "\n\n";
6450
6451                 foreach my $line (@{$co{'comment'}}) {
6452                         print to_utf8($line) . "\n";
6453                 }
6454                 print "---\n\n";
6455         } elsif ($format eq 'patch') {
6456                 my $filename = basename($project) . "-$hash.patch";
6457
6458                 print $cgi->header(
6459                         -type => 'text/plain',
6460                         -charset => 'utf-8',
6461                         -expires => $expires,
6462                         -content_disposition => 'inline; filename="' . "$filename" . '"');
6463         }
6464
6465         # write patch
6466         if ($format eq 'html') {
6467                 my $use_parents = !defined $hash_parent ||
6468                         $hash_parent eq '-c' || $hash_parent eq '--cc';
6469                 git_difftree_body(\@difftree, $hash,
6470                                   $use_parents ? @{$co{'parents'}} : $hash_parent);
6471                 print "<br/>\n";
6472
6473                 git_patchset_body($fd, \@difftree, $hash,
6474                                   $use_parents ? @{$co{'parents'}} : $hash_parent);
6475                 close $fd;
6476                 print "</div>\n"; # class="page_body"
6477                 git_footer_html();
6478
6479         } elsif ($format eq 'plain') {
6480                 local $/ = undef;
6481                 print <$fd>;
6482                 close $fd
6483                         or print "Reading git-diff-tree failed\n";
6484         } elsif ($format eq 'patch') {
6485                 local $/ = undef;
6486                 print <$fd>;
6487                 close $fd
6488                         or print "Reading git-format-patch failed\n";
6489         }
6490 }
6491
6492 sub git_commitdiff_plain {
6493         git_commitdiff(-format => 'plain');
6494 }
6495
6496 # format-patch-style patches
6497 sub git_patch {
6498         git_commitdiff(-format => 'patch', -single => 1);
6499 }
6500
6501 sub git_patches {
6502         git_commitdiff(-format => 'patch');
6503 }
6504
6505 sub git_history {
6506         git_log_generic('history', \&git_history_body,
6507                         $hash_base, $hash_parent_base,
6508                         $file_name, $hash);
6509 }
6510
6511 sub git_search {
6512         gitweb_check_feature('search') or die_error(403, "Search is disabled");
6513         if (!defined $searchtext) {
6514                 die_error(400, "Text field is empty");
6515         }
6516         if (!defined $hash) {
6517                 $hash = git_get_head_hash($project);
6518         }
6519         my %co = parse_commit($hash);
6520         if (!%co) {
6521                 die_error(404, "Unknown commit object");
6522         }
6523         if (!defined $page) {
6524                 $page = 0;
6525         }
6526
6527         $searchtype ||= 'commit';
6528         if ($searchtype eq 'pickaxe') {
6529                 # pickaxe may take all resources of your box and run for several minutes
6530                 # with every query - so decide by yourself how public you make this feature
6531                 gitweb_check_feature('pickaxe')
6532                     or die_error(403, "Pickaxe is disabled");
6533         }
6534         if ($searchtype eq 'grep') {
6535                 gitweb_check_feature('grep')
6536                     or die_error(403, "Grep is disabled");
6537         }
6538
6539         git_header_html();
6540
6541         if ($searchtype eq 'commit' or $searchtype eq 'author' or $searchtype eq 'committer') {
6542                 my $greptype;
6543                 if ($searchtype eq 'commit') {
6544                         $greptype = "--grep=";
6545                 } elsif ($searchtype eq 'author') {
6546                         $greptype = "--author=";
6547                 } elsif ($searchtype eq 'committer') {
6548                         $greptype = "--committer=";
6549                 }
6550                 $greptype .= $searchtext;
6551                 my @commitlist = parse_commits($hash, 101, (100 * $page), undef,
6552                                                $greptype, '--regexp-ignore-case',
6553                                                $search_use_regexp ? '--extended-regexp' : '--fixed-strings');
6554
6555                 my $paging_nav = '';
6556                 if ($page > 0) {
6557                         $paging_nav .=
6558                                 $cgi->a({-href => href(action=>"search", hash=>$hash,
6559                                                        searchtext=>$searchtext,
6560                                                        searchtype=>$searchtype)},
6561                                         "first");
6562                         $paging_nav .= " &sdot; " .
6563                                 $cgi->a({-href => href(-replay=>1, page=>$page-1),
6564                                          -accesskey => "p", -title => "Alt-p"}, "prev");
6565                 } else {
6566                         $paging_nav .= "first";
6567                         $paging_nav .= " &sdot; prev";
6568                 }
6569                 my $next_link = '';
6570                 if ($#commitlist >= 100) {
6571                         $next_link =
6572                                 $cgi->a({-href => href(-replay=>1, page=>$page+1),
6573                                          -accesskey => "n", -title => "Alt-n"}, "next");
6574                         $paging_nav .= " &sdot; $next_link";
6575                 } else {
6576                         $paging_nav .= " &sdot; next";
6577                 }
6578
6579                 git_print_page_nav('','', $hash,$co{'tree'},$hash, $paging_nav);
6580                 git_print_header_div('commit', esc_html($co{'title'}), $hash);
6581                 if ($page == 0 && !@commitlist) {
6582                         print "<p>No match.</p>\n";
6583                 } else {
6584                         git_search_grep_body(\@commitlist, 0, 99, $next_link);
6585                 }
6586         }
6587
6588         if ($searchtype eq 'pickaxe') {
6589                 git_print_page_nav('','', $hash,$co{'tree'},$hash);
6590                 git_print_header_div('commit', esc_html($co{'title'}), $hash);
6591
6592                 print "<table class=\"pickaxe search\">\n";
6593                 my $alternate = 1;
6594                 local $/ = "\n";
6595                 open my $fd, '-|', git_cmd(), '--no-pager', 'log', @diff_opts,
6596                         '--pretty=format:%H', '--no-abbrev', '--raw', "-S$searchtext",
6597                         ($search_use_regexp ? '--pickaxe-regex' : ());
6598                 undef %co;
6599                 my @files;
6600                 while (my $line = <$fd>) {
6601                         chomp $line;
6602                         next unless $line;
6603
6604                         my %set = parse_difftree_raw_line($line);
6605                         if (defined $set{'commit'}) {
6606                                 # finish previous commit
6607                                 if (%co) {
6608                                         print "</td>\n" .
6609                                               "<td class=\"link\">" .
6610                                               $cgi->a({-href => href(action=>"commit", hash=>$co{'id'})}, "commit") .
6611                                               " | " .
6612                                               $cgi->a({-href => href(action=>"tree", hash=>$co{'tree'}, hash_base=>$co{'id'})}, "tree");
6613                                         print "</td>\n" .
6614                                               "</tr>\n";
6615                                 }
6616
6617                                 if ($alternate) {
6618                                         print "<tr class=\"dark\">\n";
6619                                 } else {
6620                                         print "<tr class=\"light\">\n";
6621                                 }
6622                                 $alternate ^= 1;
6623                                 %co = parse_commit($set{'commit'});
6624                                 my $author = chop_and_escape_str($co{'author_name'}, 15, 5);
6625                                 print "<td title=\"$co{'age_string_age'}\"><i>$co{'age_string_date'}</i></td>\n" .
6626                                       "<td><i>$author</i></td>\n" .
6627                                       "<td>" .
6628                                       $cgi->a({-href => href(action=>"commit", hash=>$co{'id'}),
6629                                               -class => "list subject"},
6630                                               chop_and_escape_str($co{'title'}, 50) . "<br/>");
6631                         } elsif (defined $set{'to_id'}) {
6632                                 next if ($set{'to_id'} =~ m/^0{40}$/);
6633
6634                                 print $cgi->a({-href => href(action=>"blob", hash_base=>$co{'id'},
6635                                                              hash=>$set{'to_id'}, file_name=>$set{'to_file'}),
6636                                               -class => "list"},
6637                                               "<span class=\"match\">" . esc_path($set{'file'}) . "</span>") .
6638                                       "<br/>\n";
6639                         }
6640                 }
6641                 close $fd;
6642
6643                 # finish last commit (warning: repetition!)
6644                 if (%co) {
6645                         print "</td>\n" .
6646                               "<td class=\"link\">" .
6647                               $cgi->a({-href => href(action=>"commit", hash=>$co{'id'})}, "commit") .
6648                               " | " .
6649                               $cgi->a({-href => href(action=>"tree", hash=>$co{'tree'}, hash_base=>$co{'id'})}, "tree");
6650                         print "</td>\n" .
6651                               "</tr>\n";
6652                 }
6653
6654                 print "</table>\n";
6655         }
6656
6657         if ($searchtype eq 'grep') {
6658                 git_print_page_nav('','', $hash,$co{'tree'},$hash);
6659                 git_print_header_div('commit', esc_html($co{'title'}), $hash);
6660
6661                 print "<table class=\"grep_search\">\n";
6662                 my $alternate = 1;
6663                 my $matches = 0;
6664                 local $/ = "\n";
6665                 open my $fd, "-|", git_cmd(), 'grep', '-n',
6666                         $search_use_regexp ? ('-E', '-i') : '-F',
6667                         $searchtext, $co{'tree'};
6668                 my $lastfile = '';
6669                 while (my $line = <$fd>) {
6670                         chomp $line;
6671                         my ($file, $lno, $ltext, $binary);
6672                         last if ($matches++ > 1000);
6673                         if ($line =~ /^Binary file (.+) matches$/) {
6674                                 $file = $1;
6675                                 $binary = 1;
6676                         } else {
6677                                 (undef, $file, $lno, $ltext) = split(/:/, $line, 4);
6678                         }
6679                         if ($file ne $lastfile) {
6680                                 $lastfile and print "</td></tr>\n";
6681                                 if ($alternate++) {
6682                                         print "<tr class=\"dark\">\n";
6683                                 } else {
6684                                         print "<tr class=\"light\">\n";
6685                                 }
6686                                 print "<td class=\"list\">".
6687                                         $cgi->a({-href => href(action=>"blob", hash=>$co{'hash'},
6688                                                                file_name=>"$file"),
6689                                                 -class => "list"}, esc_path($file));
6690                                 print "</td><td>\n";
6691                                 $lastfile = $file;
6692                         }
6693                         if ($binary) {
6694                                 print "<div class=\"binary\">Binary file</div>\n";
6695                         } else {
6696                                 $ltext = untabify($ltext);
6697                                 if ($ltext =~ m/^(.*)($search_regexp)(.*)$/i) {
6698                                         $ltext = esc_html($1, -nbsp=>1);
6699                                         $ltext .= '<span class="match">';
6700                                         $ltext .= esc_html($2, -nbsp=>1);
6701                                         $ltext .= '</span>';
6702                                         $ltext .= esc_html($3, -nbsp=>1);
6703                                 } else {
6704                                         $ltext = esc_html($ltext, -nbsp=>1);
6705                                 }
6706                                 print "<div class=\"pre\">" .
6707                                         $cgi->a({-href => href(action=>"blob", hash=>$co{'hash'},
6708                                                                file_name=>"$file").'#l'.$lno,
6709                                                 -class => "linenr"}, sprintf('%4i', $lno))
6710                                         . ' ' .  $ltext . "</div>\n";
6711                         }
6712                 }
6713                 if ($lastfile) {
6714                         print "</td></tr>\n";
6715                         if ($matches > 1000) {
6716                                 print "<div class=\"diff nodifferences\">Too many matches, listing trimmed</div>\n";
6717                         }
6718                 } else {
6719                         print "<div class=\"diff nodifferences\">No matches found</div>\n";
6720                 }
6721                 close $fd;
6722
6723                 print "</table>\n";
6724         }
6725         git_footer_html();
6726 }
6727
6728 sub git_search_help {
6729         git_header_html();
6730         git_print_page_nav('','', $hash,$hash,$hash);
6731         print <<EOT;
6732 <p><strong>Pattern</strong> is by default a normal string that is matched precisely (but without
6733 regard to case, except in the case of pickaxe). However, when you check the <em>re</em> checkbox,
6734 the pattern entered is recognized as the POSIX extended
6735 <a href="http://en.wikipedia.org/wiki/Regular_expression">regular expression</a> (also case
6736 insensitive).</p>
6737 <dl>
6738 <dt><b>commit</b></dt>
6739 <dd>The commit messages and authorship information will be scanned for the given pattern.</dd>
6740 EOT
6741         my $have_grep = gitweb_check_feature('grep');
6742         if ($have_grep) {
6743                 print <<EOT;
6744 <dt><b>grep</b></dt>
6745 <dd>All files in the currently selected tree (HEAD unless you are explicitly browsing
6746     a different one) are searched for the given pattern. On large trees, this search can take
6747 a while and put some strain on the server, so please use it with some consideration. Note that
6748 due to git-grep peculiarity, currently if regexp mode is turned off, the matches are
6749 case-sensitive.</dd>
6750 EOT
6751         }
6752         print <<EOT;
6753 <dt><b>author</b></dt>
6754 <dd>Name and e-mail of the change author and date of birth of the patch will be scanned for the given pattern.</dd>
6755 <dt><b>committer</b></dt>
6756 <dd>Name and e-mail of the committer and date of commit will be scanned for the given pattern.</dd>
6757 EOT
6758         my $have_pickaxe = gitweb_check_feature('pickaxe');
6759         if ($have_pickaxe) {
6760                 print <<EOT;
6761 <dt><b>pickaxe</b></dt>
6762 <dd>All commits that caused the string to appear or disappear from any file (changes that
6763 added, removed or "modified" the string) will be listed. This search can take a while and
6764 takes a lot of strain on the server, so please use it wisely. Note that since you may be
6765 interested even in changes just changing the case as well, this search is case sensitive.</dd>
6766 EOT
6767         }
6768         print "</dl>\n";
6769         git_footer_html();
6770 }
6771
6772 sub git_shortlog {
6773         git_log_generic('shortlog', \&git_shortlog_body,
6774                         $hash, $hash_parent);
6775 }
6776
6777 ## ......................................................................
6778 ## feeds (RSS, Atom; OPML)
6779
6780 sub git_feed {
6781         my $format = shift || 'atom';
6782         my $have_blame = gitweb_check_feature('blame');
6783
6784         # Atom: http://www.atomenabled.org/developers/syndication/
6785         # RSS:  http://www.notestips.com/80256B3A007F2692/1/NAMO5P9UPQ
6786         if ($format ne 'rss' && $format ne 'atom') {
6787                 die_error(400, "Unknown web feed format");
6788         }
6789
6790         # log/feed of current (HEAD) branch, log of given branch, history of file/directory
6791         my $head = $hash || 'HEAD';
6792         my @commitlist = parse_commits($head, 150, 0, $file_name);
6793
6794         my %latest_commit;
6795         my %latest_date;
6796         my $content_type = "application/$format+xml";
6797         if (defined $cgi->http('HTTP_ACCEPT') &&
6798                  $cgi->Accept('text/xml') > $cgi->Accept($content_type)) {
6799                 # browser (feed reader) prefers text/xml
6800                 $content_type = 'text/xml';
6801         }
6802         if (defined($commitlist[0])) {
6803                 %latest_commit = %{$commitlist[0]};
6804                 my $latest_epoch = $latest_commit{'committer_epoch'};
6805                 %latest_date   = parse_date($latest_epoch);
6806                 my $if_modified = $cgi->http('IF_MODIFIED_SINCE');
6807                 if (defined $if_modified) {
6808                         my $since;
6809                         if (eval { require HTTP::Date; 1; }) {
6810                                 $since = HTTP::Date::str2time($if_modified);
6811                         } elsif (eval { require Time::ParseDate; 1; }) {
6812                                 $since = Time::ParseDate::parsedate($if_modified, GMT => 1);
6813                         }
6814                         if (defined $since && $latest_epoch <= $since) {
6815                                 print $cgi->header(
6816                                         -type => $content_type,
6817                                         -charset => 'utf-8',
6818                                         -last_modified => $latest_date{'rfc2822'},
6819                                         -status => '304 Not Modified');
6820                                 return;
6821                         }
6822                 }
6823                 print $cgi->header(
6824                         -type => $content_type,
6825                         -charset => 'utf-8',
6826                         -last_modified => $latest_date{'rfc2822'});
6827         } else {
6828                 print $cgi->header(
6829                         -type => $content_type,
6830                         -charset => 'utf-8');
6831         }
6832
6833         # Optimization: skip generating the body if client asks only
6834         # for Last-Modified date.
6835         return if ($cgi->request_method() eq 'HEAD');
6836
6837         # header variables
6838         my $title = "$site_name - $project/$action";
6839         my $feed_type = 'log';
6840         if (defined $hash) {
6841                 $title .= " - '$hash'";
6842                 $feed_type = 'branch log';
6843                 if (defined $file_name) {
6844                         $title .= " :: $file_name";
6845                         $feed_type = 'history';
6846                 }
6847         } elsif (defined $file_name) {
6848                 $title .= " - $file_name";
6849                 $feed_type = 'history';
6850         }
6851         $title .= " $feed_type";
6852         my $descr = git_get_project_description($project);
6853         if (defined $descr) {
6854                 $descr = esc_html($descr);
6855         } else {
6856                 $descr = "$project " .
6857                          ($format eq 'rss' ? 'RSS' : 'Atom') .
6858                          " feed";
6859         }
6860         my $owner = git_get_project_owner($project);
6861         $owner = esc_html($owner);
6862
6863         #header
6864         my $alt_url;
6865         if (defined $file_name) {
6866                 $alt_url = href(-full=>1, action=>"history", hash=>$hash, file_name=>$file_name);
6867         } elsif (defined $hash) {
6868                 $alt_url = href(-full=>1, action=>"log", hash=>$hash);
6869         } else {
6870                 $alt_url = href(-full=>1, action=>"summary");
6871         }
6872         print qq!<?xml version="1.0" encoding="utf-8"?>\n!;
6873         if ($format eq 'rss') {
6874                 print <<XML;
6875 <rss version="2.0" xmlns:content="http://purl.org/rss/1.0/modules/content/">
6876 <channel>
6877 XML
6878                 print "<title>$title</title>\n" .
6879                       "<link>$alt_url</link>\n" .
6880                       "<description>$descr</description>\n" .
6881                       "<language>en</language>\n" .
6882                       # project owner is responsible for 'editorial' content
6883                       "<managingEditor>$owner</managingEditor>\n";
6884                 if (defined $logo || defined $favicon) {
6885                         # prefer the logo to the favicon, since RSS
6886                         # doesn't allow both
6887                         my $img = esc_url($logo || $favicon);
6888                         print "<image>\n" .
6889                               "<url>$img</url>\n" .
6890                               "<title>$title</title>\n" .
6891                               "<link>$alt_url</link>\n" .
6892                               "</image>\n";
6893                 }
6894                 if (%latest_date) {
6895                         print "<pubDate>$latest_date{'rfc2822'}</pubDate>\n";
6896                         print "<lastBuildDate>$latest_date{'rfc2822'}</lastBuildDate>\n";
6897                 }
6898                 print "<generator>gitweb v.$version/$git_version</generator>\n";
6899         } elsif ($format eq 'atom') {
6900                 print <<XML;
6901 <feed xmlns="http://www.w3.org/2005/Atom">
6902 XML
6903                 print "<title>$title</title>\n" .
6904                       "<subtitle>$descr</subtitle>\n" .
6905                       '<link rel="alternate" type="text/html" href="' .
6906                       $alt_url . '" />' . "\n" .
6907                       '<link rel="self" type="' . $content_type . '" href="' .
6908                       $cgi->self_url() . '" />' . "\n" .
6909                       "<id>" . href(-full=>1) . "</id>\n" .
6910                       # use project owner for feed author
6911                       "<author><name>$owner</name></author>\n";
6912                 if (defined $favicon) {
6913                         print "<icon>" . esc_url($favicon) . "</icon>\n";
6914                 }
6915                 if (defined $logo_url) {
6916                         # not twice as wide as tall: 72 x 27 pixels
6917                         print "<logo>" . esc_url($logo) . "</logo>\n";
6918                 }
6919                 if (! %latest_date) {
6920                         # dummy date to keep the feed valid until commits trickle in:
6921                         print "<updated>1970-01-01T00:00:00Z</updated>\n";
6922                 } else {
6923                         print "<updated>$latest_date{'iso-8601'}</updated>\n";
6924                 }
6925                 print "<generator version='$version/$git_version'>gitweb</generator>\n";
6926         }
6927
6928         # contents
6929         for (my $i = 0; $i <= $#commitlist; $i++) {
6930                 my %co = %{$commitlist[$i]};
6931                 my $commit = $co{'id'};
6932                 # we read 150, we always show 30 and the ones more recent than 48 hours
6933                 if (($i >= 20) && ((time - $co{'author_epoch'}) > 48*60*60)) {
6934                         last;
6935                 }
6936                 my %cd = parse_date($co{'author_epoch'});
6937
6938                 # get list of changed files
6939                 open my $fd, "-|", git_cmd(), "diff-tree", '-r', @diff_opts,
6940                         $co{'parent'} || "--root",
6941                         $co{'id'}, "--", (defined $file_name ? $file_name : ())
6942                         or next;
6943                 my @difftree = map { chomp; $_ } <$fd>;
6944                 close $fd
6945                         or next;
6946
6947                 # print element (entry, item)
6948                 my $co_url = href(-full=>1, action=>"commitdiff", hash=>$commit);
6949                 if ($format eq 'rss') {
6950                         print "<item>\n" .
6951                               "<title>" . esc_html($co{'title'}) . "</title>\n" .
6952                               "<author>" . esc_html($co{'author'}) . "</author>\n" .
6953                               "<pubDate>$cd{'rfc2822'}</pubDate>\n" .
6954                               "<guid isPermaLink=\"true\">$co_url</guid>\n" .
6955                               "<link>$co_url</link>\n" .
6956                               "<description>" . esc_html($co{'title'}) . "</description>\n" .
6957                               "<content:encoded>" .
6958                               "<![CDATA[\n";
6959                 } elsif ($format eq 'atom') {
6960                         print "<entry>\n" .
6961                               "<title type=\"html\">" . esc_html($co{'title'}) . "</title>\n" .
6962                               "<updated>$cd{'iso-8601'}</updated>\n" .
6963                               "<author>\n" .
6964                               "  <name>" . esc_html($co{'author_name'}) . "</name>\n";
6965                         if ($co{'author_email'}) {
6966                                 print "  <email>" . esc_html($co{'author_email'}) . "</email>\n";
6967                         }
6968                         print "</author>\n" .
6969                               # use committer for contributor
6970                               "<contributor>\n" .
6971                               "  <name>" . esc_html($co{'committer_name'}) . "</name>\n";
6972                         if ($co{'committer_email'}) {
6973                                 print "  <email>" . esc_html($co{'committer_email'}) . "</email>\n";
6974                         }
6975                         print "</contributor>\n" .
6976                               "<published>$cd{'iso-8601'}</published>\n" .
6977                               "<link rel=\"alternate\" type=\"text/html\" href=\"$co_url\" />\n" .
6978                               "<id>$co_url</id>\n" .
6979                               "<content type=\"xhtml\" xml:base=\"" . esc_url($my_url) . "\">\n" .
6980                               "<div xmlns=\"http://www.w3.org/1999/xhtml\">\n";
6981                 }
6982                 my $comment = $co{'comment'};
6983                 print "<pre>\n";
6984                 foreach my $line (@$comment) {
6985                         $line = esc_html($line);
6986                         print "$line\n";
6987                 }
6988                 print "</pre><ul>\n";
6989                 foreach my $difftree_line (@difftree) {
6990                         my %difftree = parse_difftree_raw_line($difftree_line);
6991                         next if !$difftree{'from_id'};
6992
6993                         my $file = $difftree{'file'} || $difftree{'to_file'};
6994
6995                         print "<li>" .
6996                               "[" .
6997                               $cgi->a({-href => href(-full=>1, action=>"blobdiff",
6998                                                      hash=>$difftree{'to_id'}, hash_parent=>$difftree{'from_id'},
6999                                                      hash_base=>$co{'id'}, hash_parent_base=>$co{'parent'},
7000                                                      file_name=>$file, file_parent=>$difftree{'from_file'}),
7001                                       -title => "diff"}, 'D');
7002                         if ($have_blame) {
7003                                 print $cgi->a({-href => href(-full=>1, action=>"blame",
7004                                                              file_name=>$file, hash_base=>$commit),
7005                                               -title => "blame"}, 'B');
7006                         }
7007                         # if this is not a feed of a file history
7008                         if (!defined $file_name || $file_name ne $file) {
7009                                 print $cgi->a({-href => href(-full=>1, action=>"history",
7010                                                              file_name=>$file, hash=>$commit),
7011                                               -title => "history"}, 'H');
7012                         }
7013                         $file = esc_path($file);
7014                         print "] ".
7015                               "$file</li>\n";
7016                 }
7017                 if ($format eq 'rss') {
7018                         print "</ul>]]>\n" .
7019                               "</content:encoded>\n" .
7020                               "</item>\n";
7021                 } elsif ($format eq 'atom') {
7022                         print "</ul>\n</div>\n" .
7023                               "</content>\n" .
7024                               "</entry>\n";
7025                 }
7026         }
7027
7028         # end of feed
7029         if ($format eq 'rss') {
7030                 print "</channel>\n</rss>\n";
7031         } elsif ($format eq 'atom') {
7032                 print "</feed>\n";
7033         }
7034 }
7035
7036 sub git_rss {
7037         git_feed('rss');
7038 }
7039
7040 sub git_atom {
7041         git_feed('atom');
7042 }
7043
7044 sub git_opml {
7045         my @list = git_get_projects_list();
7046
7047         print $cgi->header(
7048                 -type => 'text/xml',
7049                 -charset => 'utf-8',
7050                 -content_disposition => 'inline; filename="opml.xml"');
7051
7052         print <<XML;
7053 <?xml version="1.0" encoding="utf-8"?>
7054 <opml version="1.0">
7055 <head>
7056   <title>$site_name OPML Export</title>
7057 </head>
7058 <body>
7059 <outline text="git RSS feeds">
7060 XML
7061
7062         foreach my $pr (@list) {
7063                 my %proj = %$pr;
7064                 my $head = git_get_head_hash($proj{'path'});
7065                 if (!defined $head) {
7066                         next;
7067                 }
7068                 $git_dir = "$projectroot/$proj{'path'}";
7069                 my %co = parse_commit($head);
7070                 if (!%co) {
7071                         next;
7072                 }
7073
7074                 my $path = esc_html(chop_str($proj{'path'}, 25, 5));
7075                 my $rss  = href('project' => $proj{'path'}, 'action' => 'rss', -full => 1);
7076                 my $html = href('project' => $proj{'path'}, 'action' => 'summary', -full => 1);
7077                 print "<outline type=\"rss\" text=\"$path\" title=\"$path\" xmlUrl=\"$rss\" htmlUrl=\"$html\"/>\n";
7078         }
7079         print <<XML;
7080 </outline>
7081 </body>
7082 </opml>
7083 XML
7084 }