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         evaluate_git_version();
1092         check_loadavg();
1093
1094         # $projectroot and $projects_list might be set in gitweb config file
1095         $projects_list ||= $projectroot;
1096
1097         evaluate_query_params();
1098         evaluate_path_info();
1099         evaluate_and_validate_params();
1100         evaluate_git_dir();
1101
1102         configure_gitweb_features();
1103
1104         dispatch();
1105 }
1106
1107 our $is_last_request = sub { 1 };
1108 our ($pre_dispatch_hook, $post_dispatch_hook, $pre_listen_hook);
1109 our $CGI = 'CGI';
1110 our $cgi;
1111 sub configure_as_fcgi {
1112         require CGI::Fast;
1113         our $CGI = 'CGI::Fast';
1114
1115         my $request_number = 0;
1116         # let each child service 100 requests
1117         our $is_last_request = sub { ++$request_number > 100 };
1118 }
1119 sub evaluate_argv {
1120         my $script_name = $ENV{'SCRIPT_NAME'} || $ENV{'SCRIPT_FILENAME'} || __FILE__;
1121         configure_as_fcgi()
1122                 if $script_name =~ /\.fcgi$/;
1123
1124         return unless (@ARGV);
1125
1126         require Getopt::Long;
1127         Getopt::Long::GetOptions(
1128                 'fastcgi|fcgi|f' => \&configure_as_fcgi,
1129                 'nproc|n=i' => sub {
1130                         my ($arg, $val) = @_;
1131                         return unless eval { require FCGI::ProcManager; 1; };
1132                         my $proc_manager = FCGI::ProcManager->new({
1133                                 n_processes => $val,
1134                         });
1135                         our $pre_listen_hook    = sub { $proc_manager->pm_manage()        };
1136                         our $pre_dispatch_hook  = sub { $proc_manager->pm_pre_dispatch()  };
1137                         our $post_dispatch_hook = sub { $proc_manager->pm_post_dispatch() };
1138                 },
1139         );
1140 }
1141
1142 sub run {
1143         evaluate_argv();
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 # Implementation note: when a single remote is wanted, we cannot use 'git
2776 # remote show -n' because that command always work (assuming it's a remote URL
2777 # if it's not defined), and we cannot use 'git remote show' because that would
2778 # try to make a network roundtrip. So the only way to find if that particular
2779 # remote is defined is to walk the list provided by 'git remote -v' and stop if
2780 # and when we find what we want.
2781 sub git_get_remotes_list {
2782         my $wanted = shift;
2783         my %remotes = ();
2784
2785         open my $fd, '-|' , git_cmd(), 'remote', '-v';
2786         return unless $fd;
2787         while (my $remote = <$fd>) {
2788                 chomp $remote;
2789                 $remote =~ s!\t(.*?)\s+\((\w+)\)$!!;
2790                 next if $wanted and not $remote eq $wanted;
2791                 my ($url, $key) = ($1, $2);
2792
2793                 $remotes{$remote} ||= { 'heads' => () };
2794                 $remotes{$remote}{$key} = $url;
2795         }
2796         close $fd or return;
2797         return wantarray ? %remotes : \%remotes;
2798 }
2799
2800 # Takes a hash of remotes as first parameter and fills it by adding the
2801 # available remote heads for each of the indicated remotes.
2802 sub fill_remote_heads {
2803         my $remotes = shift;
2804         my @heads = map { "remotes/$_" } keys %$remotes;
2805         my @remoteheads = git_get_heads_list(undef, @heads);
2806         foreach my $remote (keys %$remotes) {
2807                 $remotes->{$remote}{'heads'} = [ grep {
2808                         $_->{'name'} =~ s!^$remote/!!
2809                         } @remoteheads ];
2810         }
2811 }
2812
2813 sub git_get_references {
2814         my $type = shift || "";
2815         my %refs;
2816         # 5dc01c595e6c6ec9ccda4f6f69c131c0dd945f8c refs/tags/v2.6.11
2817         # c39ae07f393806ccf406ef966e9a15afc43cc36a refs/tags/v2.6.11^{}
2818         open my $fd, "-|", git_cmd(), "show-ref", "--dereference",
2819                 ($type ? ("--", "refs/$type") : ()) # use -- <pattern> if $type
2820                 or return;
2821
2822         while (my $line = <$fd>) {
2823                 chomp $line;
2824                 if ($line =~ m!^([0-9a-fA-F]{40})\srefs/($type.*)$!) {
2825                         if (defined $refs{$1}) {
2826                                 push @{$refs{$1}}, $2;
2827                         } else {
2828                                 $refs{$1} = [ $2 ];
2829                         }
2830                 }
2831         }
2832         close $fd or return;
2833         return \%refs;
2834 }
2835
2836 sub git_get_rev_name_tags {
2837         my $hash = shift || return undef;
2838
2839         open my $fd, "-|", git_cmd(), "name-rev", "--tags", $hash
2840                 or return;
2841         my $name_rev = <$fd>;
2842         close $fd;
2843
2844         if ($name_rev =~ m|^$hash tags/(.*)$|) {
2845                 return $1;
2846         } else {
2847                 # catches also '$hash undefined' output
2848                 return undef;
2849         }
2850 }
2851
2852 ## ----------------------------------------------------------------------
2853 ## parse to hash functions
2854
2855 sub parse_date {
2856         my $epoch = shift;
2857         my $tz = shift || "-0000";
2858
2859         my %date;
2860         my @months = ("Jan", "Feb", "Mar", "Apr", "May", "Jun", "Jul", "Aug", "Sep", "Oct", "Nov", "Dec");
2861         my @days = ("Sun", "Mon", "Tue", "Wed", "Thu", "Fri", "Sat");
2862         my ($sec, $min, $hour, $mday, $mon, $year, $wday, $yday) = gmtime($epoch);
2863         $date{'hour'} = $hour;
2864         $date{'minute'} = $min;
2865         $date{'mday'} = $mday;
2866         $date{'day'} = $days[$wday];
2867         $date{'month'} = $months[$mon];
2868         $date{'rfc2822'}   = sprintf "%s, %d %s %4d %02d:%02d:%02d +0000",
2869                              $days[$wday], $mday, $months[$mon], 1900+$year, $hour ,$min, $sec;
2870         $date{'mday-time'} = sprintf "%d %s %02d:%02d",
2871                              $mday, $months[$mon], $hour ,$min;
2872         $date{'iso-8601'}  = sprintf "%04d-%02d-%02dT%02d:%02d:%02dZ",
2873                              1900+$year, 1+$mon, $mday, $hour ,$min, $sec;
2874
2875         $tz =~ m/^([+\-][0-9][0-9])([0-9][0-9])$/;
2876         my $local = $epoch + ((int $1 + ($2/60)) * 3600);
2877         ($sec, $min, $hour, $mday, $mon, $year, $wday, $yday) = gmtime($local);
2878         $date{'hour_local'} = $hour;
2879         $date{'minute_local'} = $min;
2880         $date{'tz_local'} = $tz;
2881         $date{'iso-tz'} = sprintf("%04d-%02d-%02d %02d:%02d:%02d %s",
2882                                   1900+$year, $mon+1, $mday,
2883                                   $hour, $min, $sec, $tz);
2884         return %date;
2885 }
2886
2887 sub parse_tag {
2888         my $tag_id = shift;
2889         my %tag;
2890         my @comment;
2891
2892         open my $fd, "-|", git_cmd(), "cat-file", "tag", $tag_id or return;
2893         $tag{'id'} = $tag_id;
2894         while (my $line = <$fd>) {
2895                 chomp $line;
2896                 if ($line =~ m/^object ([0-9a-fA-F]{40})$/) {
2897                         $tag{'object'} = $1;
2898                 } elsif ($line =~ m/^type (.+)$/) {
2899                         $tag{'type'} = $1;
2900                 } elsif ($line =~ m/^tag (.+)$/) {
2901                         $tag{'name'} = $1;
2902                 } elsif ($line =~ m/^tagger (.*) ([0-9]+) (.*)$/) {
2903                         $tag{'author'} = $1;
2904                         $tag{'author_epoch'} = $2;
2905                         $tag{'author_tz'} = $3;
2906                         if ($tag{'author'} =~ m/^([^<]+) <([^>]*)>/) {
2907                                 $tag{'author_name'}  = $1;
2908                                 $tag{'author_email'} = $2;
2909                         } else {
2910                                 $tag{'author_name'} = $tag{'author'};
2911                         }
2912                 } elsif ($line =~ m/--BEGIN/) {
2913                         push @comment, $line;
2914                         last;
2915                 } elsif ($line eq "") {
2916                         last;
2917                 }
2918         }
2919         push @comment, <$fd>;
2920         $tag{'comment'} = \@comment;
2921         close $fd or return;
2922         if (!defined $tag{'name'}) {
2923                 return
2924         };
2925         return %tag
2926 }
2927
2928 sub parse_commit_text {
2929         my ($commit_text, $withparents) = @_;
2930         my @commit_lines = split '\n', $commit_text;
2931         my %co;
2932
2933         pop @commit_lines; # Remove '\0'
2934
2935         if (! @commit_lines) {
2936                 return;
2937         }
2938
2939         my $header = shift @commit_lines;
2940         if ($header !~ m/^[0-9a-fA-F]{40}/) {
2941                 return;
2942         }
2943         ($co{'id'}, my @parents) = split ' ', $header;
2944         while (my $line = shift @commit_lines) {
2945                 last if $line eq "\n";
2946                 if ($line =~ m/^tree ([0-9a-fA-F]{40})$/) {
2947                         $co{'tree'} = $1;
2948                 } elsif ((!defined $withparents) && ($line =~ m/^parent ([0-9a-fA-F]{40})$/)) {
2949                         push @parents, $1;
2950                 } elsif ($line =~ m/^author (.*) ([0-9]+) (.*)$/) {
2951                         $co{'author'} = to_utf8($1);
2952                         $co{'author_epoch'} = $2;
2953                         $co{'author_tz'} = $3;
2954                         if ($co{'author'} =~ m/^([^<]+) <([^>]*)>/) {
2955                                 $co{'author_name'}  = $1;
2956                                 $co{'author_email'} = $2;
2957                         } else {
2958                                 $co{'author_name'} = $co{'author'};
2959                         }
2960                 } elsif ($line =~ m/^committer (.*) ([0-9]+) (.*)$/) {
2961                         $co{'committer'} = to_utf8($1);
2962                         $co{'committer_epoch'} = $2;
2963                         $co{'committer_tz'} = $3;
2964                         if ($co{'committer'} =~ m/^([^<]+) <([^>]*)>/) {
2965                                 $co{'committer_name'}  = $1;
2966                                 $co{'committer_email'} = $2;
2967                         } else {
2968                                 $co{'committer_name'} = $co{'committer'};
2969                         }
2970                 }
2971         }
2972         if (!defined $co{'tree'}) {
2973                 return;
2974         };
2975         $co{'parents'} = \@parents;
2976         $co{'parent'} = $parents[0];
2977
2978         foreach my $title (@commit_lines) {
2979                 $title =~ s/^    //;
2980                 if ($title ne "") {
2981                         $co{'title'} = chop_str($title, 80, 5);
2982                         # remove leading stuff of merges to make the interesting part visible
2983                         if (length($title) > 50) {
2984                                 $title =~ s/^Automatic //;
2985                                 $title =~ s/^merge (of|with) /Merge ... /i;
2986                                 if (length($title) > 50) {
2987                                         $title =~ s/(http|rsync):\/\///;
2988                                 }
2989                                 if (length($title) > 50) {
2990                                         $title =~ s/(master|www|rsync)\.//;
2991                                 }
2992                                 if (length($title) > 50) {
2993                                         $title =~ s/kernel.org:?//;
2994                                 }
2995                                 if (length($title) > 50) {
2996                                         $title =~ s/\/pub\/scm//;
2997                                 }
2998                         }
2999                         $co{'title_short'} = chop_str($title, 50, 5);
3000                         last;
3001                 }
3002         }
3003         if (! defined $co{'title'} || $co{'title'} eq "") {
3004                 $co{'title'} = $co{'title_short'} = '(no commit message)';
3005         }
3006         # remove added spaces
3007         foreach my $line (@commit_lines) {
3008                 $line =~ s/^    //;
3009         }
3010         $co{'comment'} = \@commit_lines;
3011
3012         my $age = time - $co{'committer_epoch'};
3013         $co{'age'} = $age;
3014         $co{'age_string'} = age_string($age);
3015         my ($sec, $min, $hour, $mday, $mon, $year, $wday, $yday) = gmtime($co{'committer_epoch'});
3016         if ($age > 60*60*24*7*2) {
3017                 $co{'age_string_date'} = sprintf "%4i-%02u-%02i", 1900 + $year, $mon+1, $mday;
3018                 $co{'age_string_age'} = $co{'age_string'};
3019         } else {
3020                 $co{'age_string_date'} = $co{'age_string'};
3021                 $co{'age_string_age'} = sprintf "%4i-%02u-%02i", 1900 + $year, $mon+1, $mday;
3022         }
3023         return %co;
3024 }
3025
3026 sub parse_commit {
3027         my ($commit_id) = @_;
3028         my %co;
3029
3030         local $/ = "\0";
3031
3032         open my $fd, "-|", git_cmd(), "rev-list",
3033                 "--parents",
3034                 "--header",
3035                 "--max-count=1",
3036                 $commit_id,
3037                 "--",
3038                 or die_error(500, "Open git-rev-list failed");
3039         %co = parse_commit_text(<$fd>, 1);
3040         close $fd;
3041
3042         return %co;
3043 }
3044
3045 sub parse_commits {
3046         my ($commit_id, $maxcount, $skip, $filename, @args) = @_;
3047         my @cos;
3048
3049         $maxcount ||= 1;
3050         $skip ||= 0;
3051
3052         local $/ = "\0";
3053
3054         open my $fd, "-|", git_cmd(), "rev-list",
3055                 "--header",
3056                 @args,
3057                 ("--max-count=" . $maxcount),
3058                 ("--skip=" . $skip),
3059                 @extra_options,
3060                 $commit_id,
3061                 "--",
3062                 ($filename ? ($filename) : ())
3063                 or die_error(500, "Open git-rev-list failed");
3064         while (my $line = <$fd>) {
3065                 my %co = parse_commit_text($line);
3066                 push @cos, \%co;
3067         }
3068         close $fd;
3069
3070         return wantarray ? @cos : \@cos;
3071 }
3072
3073 # parse line of git-diff-tree "raw" output
3074 sub parse_difftree_raw_line {
3075         my $line = shift;
3076         my %res;
3077
3078         # ':100644 100644 03b218260e99b78c6df0ed378e59ed9205ccc96d 3b93d5e7cc7f7dd4ebed13a5cc1a4ad976fc94d8 M   ls-files.c'
3079         # ':100644 100644 7f9281985086971d3877aca27704f2aaf9c448ce bc190ebc71bbd923f2b728e505408f5e54bd073a M   rev-tree.c'
3080         if ($line =~ m/^:([0-7]{6}) ([0-7]{6}) ([0-9a-fA-F]{40}) ([0-9a-fA-F]{40}) (.)([0-9]{0,3})\t(.*)$/) {
3081                 $res{'from_mode'} = $1;
3082                 $res{'to_mode'} = $2;
3083                 $res{'from_id'} = $3;
3084                 $res{'to_id'} = $4;
3085                 $res{'status'} = $5;
3086                 $res{'similarity'} = $6;
3087                 if ($res{'status'} eq 'R' || $res{'status'} eq 'C') { # renamed or copied
3088                         ($res{'from_file'}, $res{'to_file'}) = map { unquote($_) } split("\t", $7);
3089                 } else {
3090                         $res{'from_file'} = $res{'to_file'} = $res{'file'} = unquote($7);
3091                 }
3092         }
3093         # '::100755 100755 100755 60e79ca1b01bc8b057abe17ddab484699a7f5fdb 94067cc5f73388f33722d52ae02f44692bc07490 94067cc5f73388f33722d52ae02f44692bc07490 MR git-gui/git-gui.sh'
3094         # combined diff (for merge commit)
3095         elsif ($line =~ s/^(::+)((?:[0-7]{6} )+)((?:[0-9a-fA-F]{40} )+)([a-zA-Z]+)\t(.*)$//) {
3096                 $res{'nparents'}  = length($1);
3097                 $res{'from_mode'} = [ split(' ', $2) ];
3098                 $res{'to_mode'} = pop @{$res{'from_mode'}};
3099                 $res{'from_id'} = [ split(' ', $3) ];
3100                 $res{'to_id'} = pop @{$res{'from_id'}};
3101                 $res{'status'} = [ split('', $4) ];
3102                 $res{'to_file'} = unquote($5);
3103         }
3104         # 'c512b523472485aef4fff9e57b229d9d243c967f'
3105         elsif ($line =~ m/^([0-9a-fA-F]{40})$/) {
3106                 $res{'commit'} = $1;
3107         }
3108
3109         return wantarray ? %res : \%res;
3110 }
3111
3112 # wrapper: return parsed line of git-diff-tree "raw" output
3113 # (the argument might be raw line, or parsed info)
3114 sub parsed_difftree_line {
3115         my $line_or_ref = shift;
3116
3117         if (ref($line_or_ref) eq "HASH") {
3118                 # pre-parsed (or generated by hand)
3119                 return $line_or_ref;
3120         } else {
3121                 return parse_difftree_raw_line($line_or_ref);
3122         }
3123 }
3124
3125 # parse line of git-ls-tree output
3126 sub parse_ls_tree_line {
3127         my $line = shift;
3128         my %opts = @_;
3129         my %res;
3130
3131         if ($opts{'-l'}) {
3132                 #'100644 blob 0fa3f3a66fb6a137f6ec2c19351ed4d807070ffa   16717  panic.c'
3133                 $line =~ m/^([0-9]+) (.+) ([0-9a-fA-F]{40}) +(-|[0-9]+)\t(.+)$/s;
3134
3135                 $res{'mode'} = $1;
3136                 $res{'type'} = $2;
3137                 $res{'hash'} = $3;
3138                 $res{'size'} = $4;
3139                 if ($opts{'-z'}) {
3140                         $res{'name'} = $5;
3141                 } else {
3142                         $res{'name'} = unquote($5);
3143                 }
3144         } else {
3145                 #'100644 blob 0fa3f3a66fb6a137f6ec2c19351ed4d807070ffa  panic.c'
3146                 $line =~ m/^([0-9]+) (.+) ([0-9a-fA-F]{40})\t(.+)$/s;
3147
3148                 $res{'mode'} = $1;
3149                 $res{'type'} = $2;
3150                 $res{'hash'} = $3;
3151                 if ($opts{'-z'}) {
3152                         $res{'name'} = $4;
3153                 } else {
3154                         $res{'name'} = unquote($4);
3155                 }
3156         }
3157
3158         return wantarray ? %res : \%res;
3159 }
3160
3161 # generates _two_ hashes, references to which are passed as 2 and 3 argument
3162 sub parse_from_to_diffinfo {
3163         my ($diffinfo, $from, $to, @parents) = @_;
3164
3165         if ($diffinfo->{'nparents'}) {
3166                 # combined diff
3167                 $from->{'file'} = [];
3168                 $from->{'href'} = [];
3169                 fill_from_file_info($diffinfo, @parents)
3170                         unless exists $diffinfo->{'from_file'};
3171                 for (my $i = 0; $i < $diffinfo->{'nparents'}; $i++) {
3172                         $from->{'file'}[$i] =
3173                                 defined $diffinfo->{'from_file'}[$i] ?
3174                                         $diffinfo->{'from_file'}[$i] :
3175                                         $diffinfo->{'to_file'};
3176                         if ($diffinfo->{'status'}[$i] ne "A") { # not new (added) file
3177                                 $from->{'href'}[$i] = href(action=>"blob",
3178                                                            hash_base=>$parents[$i],
3179                                                            hash=>$diffinfo->{'from_id'}[$i],
3180                                                            file_name=>$from->{'file'}[$i]);
3181                         } else {
3182                                 $from->{'href'}[$i] = undef;
3183                         }
3184                 }
3185         } else {
3186                 # ordinary (not combined) diff
3187                 $from->{'file'} = $diffinfo->{'from_file'};
3188                 if ($diffinfo->{'status'} ne "A") { # not new (added) file
3189                         $from->{'href'} = href(action=>"blob", hash_base=>$hash_parent,
3190                                                hash=>$diffinfo->{'from_id'},
3191                                                file_name=>$from->{'file'});
3192                 } else {
3193                         delete $from->{'href'};
3194                 }
3195         }
3196
3197         $to->{'file'} = $diffinfo->{'to_file'};
3198         if (!is_deleted($diffinfo)) { # file exists in result
3199                 $to->{'href'} = href(action=>"blob", hash_base=>$hash,
3200                                      hash=>$diffinfo->{'to_id'},
3201                                      file_name=>$to->{'file'});
3202         } else {
3203                 delete $to->{'href'};
3204         }
3205 }
3206
3207 ## ......................................................................
3208 ## parse to array of hashes functions
3209
3210 sub git_get_heads_list {
3211         my ($limit, @classes) = @_;
3212         @classes = ('heads') unless @classes;
3213         my @patterns = map { "refs/$_" } @classes;
3214         my @headslist;
3215
3216         open my $fd, '-|', git_cmd(), 'for-each-ref',
3217                 ($limit ? '--count='.($limit+1) : ()), '--sort=-committerdate',
3218                 '--format=%(objectname) %(refname) %(subject)%00%(committer)',
3219                 @patterns
3220                 or return;
3221         while (my $line = <$fd>) {
3222                 my %ref_item;
3223
3224                 chomp $line;
3225                 my ($refinfo, $committerinfo) = split(/\0/, $line);
3226                 my ($hash, $name, $title) = split(' ', $refinfo, 3);
3227                 my ($committer, $epoch, $tz) =
3228                         ($committerinfo =~ /^(.*) ([0-9]+) (.*)$/);
3229                 $ref_item{'fullname'}  = $name;
3230                 $name =~ s!^refs/(?:head|remote)s/!!;
3231
3232                 $ref_item{'name'}  = $name;
3233                 $ref_item{'id'}    = $hash;
3234                 $ref_item{'title'} = $title || '(no commit message)';
3235                 $ref_item{'epoch'} = $epoch;
3236                 if ($epoch) {
3237                         $ref_item{'age'} = age_string(time - $ref_item{'epoch'});
3238                 } else {
3239                         $ref_item{'age'} = "unknown";
3240                 }
3241
3242                 push @headslist, \%ref_item;
3243         }
3244         close $fd;
3245
3246         return wantarray ? @headslist : \@headslist;
3247 }
3248
3249 sub git_get_tags_list {
3250         my $limit = shift;
3251         my @tagslist;
3252
3253         open my $fd, '-|', git_cmd(), 'for-each-ref',
3254                 ($limit ? '--count='.($limit+1) : ()), '--sort=-creatordate',
3255                 '--format=%(objectname) %(objecttype) %(refname) '.
3256                 '%(*objectname) %(*objecttype) %(subject)%00%(creator)',
3257                 'refs/tags'
3258                 or return;
3259         while (my $line = <$fd>) {
3260                 my %ref_item;
3261
3262                 chomp $line;
3263                 my ($refinfo, $creatorinfo) = split(/\0/, $line);
3264                 my ($id, $type, $name, $refid, $reftype, $title) = split(' ', $refinfo, 6);
3265                 my ($creator, $epoch, $tz) =
3266                         ($creatorinfo =~ /^(.*) ([0-9]+) (.*)$/);
3267                 $ref_item{'fullname'} = $name;
3268                 $name =~ s!^refs/tags/!!;
3269
3270                 $ref_item{'type'} = $type;
3271                 $ref_item{'id'} = $id;
3272                 $ref_item{'name'} = $name;
3273                 if ($type eq "tag") {
3274                         $ref_item{'subject'} = $title;
3275                         $ref_item{'reftype'} = $reftype;
3276                         $ref_item{'refid'}   = $refid;
3277                 } else {
3278                         $ref_item{'reftype'} = $type;
3279                         $ref_item{'refid'}   = $id;
3280                 }
3281
3282                 if ($type eq "tag" || $type eq "commit") {
3283                         $ref_item{'epoch'} = $epoch;
3284                         if ($epoch) {
3285                                 $ref_item{'age'} = age_string(time - $ref_item{'epoch'});
3286                         } else {
3287                                 $ref_item{'age'} = "unknown";
3288                         }
3289                 }
3290
3291                 push @tagslist, \%ref_item;
3292         }
3293         close $fd;
3294
3295         return wantarray ? @tagslist : \@tagslist;
3296 }
3297
3298 ## ----------------------------------------------------------------------
3299 ## filesystem-related functions
3300
3301 sub get_file_owner {
3302         my $path = shift;
3303
3304         my ($dev, $ino, $mode, $nlink, $st_uid, $st_gid, $rdev, $size) = stat($path);
3305         my ($name, $passwd, $uid, $gid, $quota, $comment, $gcos, $dir, $shell) = getpwuid($st_uid);
3306         if (!defined $gcos) {
3307                 return undef;
3308         }
3309         my $owner = $gcos;
3310         $owner =~ s/[,;].*$//;
3311         return to_utf8($owner);
3312 }
3313
3314 # assume that file exists
3315 sub insert_file {
3316         my $filename = shift;
3317
3318         open my $fd, '<', $filename;
3319         print map { to_utf8($_) } <$fd>;
3320         close $fd;
3321 }
3322
3323 ## ......................................................................
3324 ## mimetype related functions
3325
3326 sub mimetype_guess_file {
3327         my $filename = shift;
3328         my $mimemap = shift;
3329         -r $mimemap or return undef;
3330
3331         my %mimemap;
3332         open(my $mh, '<', $mimemap) or return undef;
3333         while (<$mh>) {
3334                 next if m/^#/; # skip comments
3335                 my ($mimetype, $exts) = split(/\t+/);
3336                 if (defined $exts) {
3337                         my @exts = split(/\s+/, $exts);
3338                         foreach my $ext (@exts) {
3339                                 $mimemap{$ext} = $mimetype;
3340                         }
3341                 }
3342         }
3343         close($mh);
3344
3345         $filename =~ /\.([^.]*)$/;
3346         return $mimemap{$1};
3347 }
3348
3349 sub mimetype_guess {
3350         my $filename = shift;
3351         my $mime;
3352         $filename =~ /\./ or return undef;
3353
3354         if ($mimetypes_file) {
3355                 my $file = $mimetypes_file;
3356                 if ($file !~ m!^/!) { # if it is relative path
3357                         # it is relative to project
3358                         $file = "$projectroot/$project/$file";
3359                 }
3360                 $mime = mimetype_guess_file($filename, $file);
3361         }
3362         $mime ||= mimetype_guess_file($filename, '/etc/mime.types');
3363         return $mime;
3364 }
3365
3366 sub blob_mimetype {
3367         my $fd = shift;
3368         my $filename = shift;
3369
3370         if ($filename) {
3371                 my $mime = mimetype_guess($filename);
3372                 $mime and return $mime;
3373         }
3374
3375         # just in case
3376         return $default_blob_plain_mimetype unless $fd;
3377
3378         if (-T $fd) {
3379                 return 'text/plain';
3380         } elsif (! $filename) {
3381                 return 'application/octet-stream';
3382         } elsif ($filename =~ m/\.png$/i) {
3383                 return 'image/png';
3384         } elsif ($filename =~ m/\.gif$/i) {
3385                 return 'image/gif';
3386         } elsif ($filename =~ m/\.jpe?g$/i) {
3387                 return 'image/jpeg';
3388         } else {
3389                 return 'application/octet-stream';
3390         }
3391 }
3392
3393 sub blob_contenttype {
3394         my ($fd, $file_name, $type) = @_;
3395
3396         $type ||= blob_mimetype($fd, $file_name);
3397         if ($type eq 'text/plain' && defined $default_text_plain_charset) {
3398                 $type .= "; charset=$default_text_plain_charset";
3399         }
3400
3401         return $type;
3402 }
3403
3404 # guess file syntax for syntax highlighting; return undef if no highlighting
3405 # the name of syntax can (in the future) depend on syntax highlighter used
3406 sub guess_file_syntax {
3407         my ($highlight, $mimetype, $file_name) = @_;
3408         return undef unless ($highlight && defined $file_name);
3409         my $basename = basename($file_name, '.in');
3410         return $highlight_basename{$basename}
3411                 if exists $highlight_basename{$basename};
3412
3413         $basename =~ /\.([^.]*)$/;
3414         my $ext = $1 or return undef;
3415         return $highlight_ext{$ext}
3416                 if exists $highlight_ext{$ext};
3417
3418         return undef;
3419 }
3420
3421 # run highlighter and return FD of its output,
3422 # or return original FD if no highlighting
3423 sub run_highlighter {
3424         my ($fd, $highlight, $syntax) = @_;
3425         return $fd unless ($highlight && defined $syntax);
3426
3427         close $fd
3428                 or die_error(404, "Reading blob failed");
3429         open $fd, quote_command(git_cmd(), "cat-file", "blob", $hash)." | ".
3430                   quote_command($highlight_bin).
3431                   " --xhtml --fragment --syntax $syntax |"
3432                 or die_error(500, "Couldn't open file or run syntax highlighter");
3433         return $fd;
3434 }
3435
3436 ## ======================================================================
3437 ## functions printing HTML: header, footer, error page
3438
3439 sub get_page_title {
3440         my $title = to_utf8($site_name);
3441
3442         return $title unless (defined $project);
3443         $title .= " - " . to_utf8($project);
3444
3445         return $title unless (defined $action);
3446         $title .= "/$action"; # $action is US-ASCII (7bit ASCII)
3447
3448         return $title unless (defined $file_name);
3449         $title .= " - " . esc_path($file_name);
3450         if ($action eq "tree" && $file_name !~ m|/$|) {
3451                 $title .= "/";
3452         }
3453
3454         return $title;
3455 }
3456
3457 sub git_header_html {
3458         my $status = shift || "200 OK";
3459         my $expires = shift;
3460         my %opts = @_;
3461
3462         my $title = get_page_title();
3463         my $content_type;
3464         # require explicit support from the UA if we are to send the page as
3465         # 'application/xhtml+xml', otherwise send it as plain old 'text/html'.
3466         # we have to do this because MSIE sometimes globs '*/*', pretending to
3467         # support xhtml+xml but choking when it gets what it asked for.
3468         if (defined $cgi->http('HTTP_ACCEPT') &&
3469             $cgi->http('HTTP_ACCEPT') =~ m/(,|;|\s|^)application\/xhtml\+xml(,|;|\s|$)/ &&
3470             $cgi->Accept('application/xhtml+xml') != 0) {
3471                 $content_type = 'application/xhtml+xml';
3472         } else {
3473                 $content_type = 'text/html';
3474         }
3475         print $cgi->header(-type=>$content_type, -charset => 'utf-8',
3476                            -status=> $status, -expires => $expires)
3477                 unless ($opts{'-no_http_header'});
3478         my $mod_perl_version = $ENV{'MOD_PERL'} ? " $ENV{'MOD_PERL'}" : '';
3479         print <<EOF;
3480 <?xml version="1.0" encoding="utf-8"?>
3481 <!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Strict//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-strict.dtd">
3482 <html xmlns="http://www.w3.org/1999/xhtml" xml:lang="en-US" lang="en-US">
3483 <!-- git web interface version $version, (C) 2005-2006, Kay Sievers <kay.sievers\@vrfy.org>, Christian Gierke -->
3484 <!-- git core binaries version $git_version -->
3485 <head>
3486 <meta http-equiv="content-type" content="$content_type; charset=utf-8"/>
3487 <meta name="generator" content="gitweb/$version git/$git_version$mod_perl_version"/>
3488 <meta name="robots" content="index, nofollow"/>
3489 <title>$title</title>
3490 EOF
3491         # the stylesheet, favicon etc urls won't work correctly with path_info
3492         # unless we set the appropriate base URL
3493         if ($ENV{'PATH_INFO'}) {
3494                 print "<base href=\"".esc_url($base_url)."\" />\n";
3495         }
3496         # print out each stylesheet that exist, providing backwards capability
3497         # for those people who defined $stylesheet in a config file
3498         if (defined $stylesheet) {
3499                 print '<link rel="stylesheet" type="text/css" href="'.$stylesheet.'"/>'."\n";
3500         } else {
3501                 foreach my $stylesheet (@stylesheets) {
3502                         next unless $stylesheet;
3503                         print '<link rel="stylesheet" type="text/css" href="'.$stylesheet.'"/>'."\n";
3504                 }
3505         }
3506         if (defined $project) {
3507                 my %href_params = get_feed_info();
3508                 if (!exists $href_params{'-title'}) {
3509                         $href_params{'-title'} = 'log';
3510                 }
3511
3512                 foreach my $format qw(RSS Atom) {
3513                         my $type = lc($format);
3514                         my %link_attr = (
3515                                 '-rel' => 'alternate',
3516                                 '-title' => "$project - $href_params{'-title'} - $format feed",
3517                                 '-type' => "application/$type+xml"
3518                         );
3519
3520                         $href_params{'action'} = $type;
3521                         $link_attr{'-href'} = href(%href_params);
3522                         print "<link ".
3523                               "rel=\"$link_attr{'-rel'}\" ".
3524                               "title=\"$link_attr{'-title'}\" ".
3525                               "href=\"$link_attr{'-href'}\" ".
3526                               "type=\"$link_attr{'-type'}\" ".
3527                               "/>\n";
3528
3529                         $href_params{'extra_options'} = '--no-merges';
3530                         $link_attr{'-href'} = href(%href_params);
3531                         $link_attr{'-title'} .= ' (no merges)';
3532                         print "<link ".
3533                               "rel=\"$link_attr{'-rel'}\" ".
3534                               "title=\"$link_attr{'-title'}\" ".
3535                               "href=\"$link_attr{'-href'}\" ".
3536                               "type=\"$link_attr{'-type'}\" ".
3537                               "/>\n";
3538                 }
3539
3540         } else {
3541                 printf('<link rel="alternate" title="%s projects list" '.
3542                        'href="%s" type="text/plain; charset=utf-8" />'."\n",
3543                        $site_name, href(project=>undef, action=>"project_index"));
3544                 printf('<link rel="alternate" title="%s projects feeds" '.
3545                        'href="%s" type="text/x-opml" />'."\n",
3546                        $site_name, href(project=>undef, action=>"opml"));
3547         }
3548         if (defined $favicon) {
3549                 print qq(<link rel="shortcut icon" href="$favicon" type="image/png" />\n);
3550         }
3551
3552         print "</head>\n" .
3553               "<body>\n";
3554
3555         if (defined $site_header && -f $site_header) {
3556                 insert_file($site_header);
3557         }
3558
3559         print "<div class=\"page_header\">\n" .
3560               $cgi->a({-href => esc_url($logo_url),
3561                        -title => $logo_label},
3562                       qq(<img src="$logo" width="72" height="27" alt="git" class="logo"/>));
3563         print $cgi->a({-href => esc_url($home_link)}, $home_link_str) . " / ";
3564         if (defined $project) {
3565                 print $cgi->a({-href => href(action=>"summary")}, esc_html($project));
3566                 if (defined $action) {
3567                         my $action_print = $action ;
3568                         if (defined $opts{-action_extra}) {
3569                                 $action_print = $cgi->a({-href => href(action=>$action)},
3570                                         $action);
3571                         }
3572                         print " / $action_print";
3573                 }
3574                 if (defined $opts{-action_extra}) {
3575                         print " / $opts{-action_extra}";
3576                 }
3577                 print "\n";
3578         }
3579         print "</div>\n";
3580
3581         my $have_search = gitweb_check_feature('search');
3582         if (defined $project && $have_search) {
3583                 if (!defined $searchtext) {
3584                         $searchtext = "";
3585                 }
3586                 my $search_hash;
3587                 if (defined $hash_base) {
3588                         $search_hash = $hash_base;
3589                 } elsif (defined $hash) {
3590                         $search_hash = $hash;
3591                 } else {
3592                         $search_hash = "HEAD";
3593                 }
3594                 my $action = $my_uri;
3595                 my $use_pathinfo = gitweb_check_feature('pathinfo');
3596                 if ($use_pathinfo) {
3597                         $action .= "/".esc_url($project);
3598                 }
3599                 print $cgi->startform(-method => "get", -action => $action) .
3600                       "<div class=\"search\">\n" .
3601                       (!$use_pathinfo &&
3602                       $cgi->input({-name=>"p", -value=>$project, -type=>"hidden"}) . "\n") .
3603                       $cgi->input({-name=>"a", -value=>"search", -type=>"hidden"}) . "\n" .
3604                       $cgi->input({-name=>"h", -value=>$search_hash, -type=>"hidden"}) . "\n" .
3605                       $cgi->popup_menu(-name => 'st', -default => 'commit',
3606                                        -values => ['commit', 'grep', 'author', 'committer', 'pickaxe']) .
3607                       $cgi->sup($cgi->a({-href => href(action=>"search_help")}, "?")) .
3608                       " search:\n",
3609                       $cgi->textfield(-name => "s", -value => $searchtext) . "\n" .
3610                       "<span title=\"Extended regular expression\">" .
3611                       $cgi->checkbox(-name => 'sr', -value => 1, -label => 're',
3612                                      -checked => $search_use_regexp) .
3613                       "</span>" .
3614                       "</div>" .
3615                       $cgi->end_form() . "\n";
3616         }
3617 }
3618
3619 sub git_footer_html {
3620         my $feed_class = 'rss_logo';
3621
3622         print "<div class=\"page_footer\">\n";
3623         if (defined $project) {
3624                 my $descr = git_get_project_description($project);
3625                 if (defined $descr) {
3626                         print "<div class=\"page_footer_text\">" . esc_html($descr) . "</div>\n";
3627                 }
3628
3629                 my %href_params = get_feed_info();
3630                 if (!%href_params) {
3631                         $feed_class .= ' generic';
3632                 }
3633                 $href_params{'-title'} ||= 'log';
3634
3635                 foreach my $format qw(RSS Atom) {
3636                         $href_params{'action'} = lc($format);
3637                         print $cgi->a({-href => href(%href_params),
3638                                       -title => "$href_params{'-title'} $format feed",
3639                                       -class => $feed_class}, $format)."\n";
3640                 }
3641
3642         } else {
3643                 print $cgi->a({-href => href(project=>undef, action=>"opml"),
3644                               -class => $feed_class}, "OPML") . " ";
3645                 print $cgi->a({-href => href(project=>undef, action=>"project_index"),
3646                               -class => $feed_class}, "TXT") . "\n";
3647         }
3648         print "</div>\n"; # class="page_footer"
3649
3650         if (defined $t0 && gitweb_check_feature('timed')) {
3651                 print "<div id=\"generating_info\">\n";
3652                 print 'This page took '.
3653                       '<span id="generating_time" class="time_span">'.
3654                       Time::HiRes::tv_interval($t0, [Time::HiRes::gettimeofday()]).
3655                       ' seconds </span>'.
3656                       ' and '.
3657                       '<span id="generating_cmd">'.
3658                       $number_of_git_cmds.
3659                       '</span> git commands '.
3660                       " to generate.\n";
3661                 print "</div>\n"; # class="page_footer"
3662         }
3663
3664         if (defined $site_footer && -f $site_footer) {
3665                 insert_file($site_footer);
3666         }
3667
3668         print qq!<script type="text/javascript" src="$javascript"></script>\n!;
3669         if (defined $action &&
3670             $action eq 'blame_incremental') {
3671                 print qq!<script type="text/javascript">\n!.
3672                       qq!startBlame("!. href(action=>"blame_data", -replay=>1) .qq!",\n!.
3673                       qq!           "!. href() .qq!");\n!.
3674                       qq!</script>\n!;
3675         } elsif (gitweb_check_feature('javascript-actions')) {
3676                 print qq!<script type="text/javascript">\n!.
3677                       qq!window.onload = fixLinks;\n!.
3678                       qq!</script>\n!;
3679         }
3680
3681         print "</body>\n" .
3682               "</html>";
3683 }
3684
3685 # die_error(<http_status_code>, <error_message>[, <detailed_html_description>])
3686 # Example: die_error(404, 'Hash not found')
3687 # By convention, use the following status codes (as defined in RFC 2616):
3688 # 400: Invalid or missing CGI parameters, or
3689 #      requested object exists but has wrong type.
3690 # 403: Requested feature (like "pickaxe" or "snapshot") not enabled on
3691 #      this server or project.
3692 # 404: Requested object/revision/project doesn't exist.
3693 # 500: The server isn't configured properly, or
3694 #      an internal error occurred (e.g. failed assertions caused by bugs), or
3695 #      an unknown error occurred (e.g. the git binary died unexpectedly).
3696 # 503: The server is currently unavailable (because it is overloaded,
3697 #      or down for maintenance).  Generally, this is a temporary state.
3698 sub die_error {
3699         my $status = shift || 500;
3700         my $error = esc_html(shift) || "Internal Server Error";
3701         my $extra = shift;
3702         my %opts = @_;
3703
3704         my %http_responses = (
3705                 400 => '400 Bad Request',
3706                 403 => '403 Forbidden',
3707                 404 => '404 Not Found',
3708                 500 => '500 Internal Server Error',
3709                 503 => '503 Service Unavailable',
3710         );
3711         git_header_html($http_responses{$status}, undef, %opts);
3712         print <<EOF;
3713 <div class="page_body">
3714 <br /><br />
3715 $status - $error
3716 <br />
3717 EOF
3718         if (defined $extra) {
3719                 print "<hr />\n" .
3720                       "$extra\n";
3721         }
3722         print "</div>\n";
3723
3724         git_footer_html();
3725         goto DONE_GITWEB
3726                 unless ($opts{'-error_handler'});
3727 }
3728
3729 ## ----------------------------------------------------------------------
3730 ## functions printing or outputting HTML: navigation
3731
3732 sub git_print_page_nav {
3733         my ($current, $suppress, $head, $treehead, $treebase, $extra) = @_;
3734         $extra = '' if !defined $extra; # pager or formats
3735
3736         my @navs = qw(summary shortlog log commit commitdiff tree);
3737         if ($suppress) {
3738                 @navs = grep { $_ ne $suppress } @navs;
3739         }
3740
3741         my %arg = map { $_ => {action=>$_} } @navs;
3742         if (defined $head) {
3743                 for (qw(commit commitdiff)) {
3744                         $arg{$_}{'hash'} = $head;
3745                 }
3746                 if ($current =~ m/^(tree | log | shortlog | commit | commitdiff | search)$/x) {
3747                         for (qw(shortlog log)) {
3748                                 $arg{$_}{'hash'} = $head;
3749                         }
3750                 }
3751         }
3752
3753         $arg{'tree'}{'hash'} = $treehead if defined $treehead;
3754         $arg{'tree'}{'hash_base'} = $treebase if defined $treebase;
3755
3756         my @actions = gitweb_get_feature('actions');
3757         my %repl = (
3758                 '%' => '%',
3759                 'n' => $project,         # project name
3760                 'f' => $git_dir,         # project path within filesystem
3761                 'h' => $treehead || '',  # current hash ('h' parameter)
3762                 'b' => $treebase || '',  # hash base ('hb' parameter)
3763         );
3764         while (@actions) {
3765                 my ($label, $link, $pos) = splice(@actions,0,3);
3766                 # insert
3767                 @navs = map { $_ eq $pos ? ($_, $label) : $_ } @navs;
3768                 # munch munch
3769                 $link =~ s/%([%nfhb])/$repl{$1}/g;
3770                 $arg{$label}{'_href'} = $link;
3771         }
3772
3773         print "<div class=\"page_nav\">\n" .
3774                 (join " | ",
3775                  map { $_ eq $current ?
3776                        $_ : $cgi->a({-href => ($arg{$_}{_href} ? $arg{$_}{_href} : href(%{$arg{$_}}))}, "$_")
3777                  } @navs);
3778         print "<br/>\n$extra<br/>\n" .
3779               "</div>\n";
3780 }
3781
3782 # returns a submenu for the nagivation of the refs views (tags, heads,
3783 # remotes) with the current view disabled and the remotes view only
3784 # available if the feature is enabled
3785 sub format_ref_views {
3786         my ($current) = @_;
3787         my @ref_views = qw{tags heads};
3788         push @ref_views, 'remotes' if gitweb_check_feature('remote_heads');
3789         return join " | ", map {
3790                 $_ eq $current ? $_ :
3791                 $cgi->a({-href => href(action=>$_)}, $_)
3792         } @ref_views
3793 }
3794
3795 sub format_paging_nav {
3796         my ($action, $page, $has_next_link) = @_;
3797         my $paging_nav;
3798
3799
3800         if ($page > 0) {
3801                 $paging_nav .=
3802                         $cgi->a({-href => href(-replay=>1, page=>undef)}, "first") .
3803                         " &sdot; " .
3804                         $cgi->a({-href => href(-replay=>1, page=>$page-1),
3805                                  -accesskey => "p", -title => "Alt-p"}, "prev");
3806         } else {
3807                 $paging_nav .= "first &sdot; prev";
3808         }
3809
3810         if ($has_next_link) {
3811                 $paging_nav .= " &sdot; " .
3812                         $cgi->a({-href => href(-replay=>1, page=>$page+1),
3813                                  -accesskey => "n", -title => "Alt-n"}, "next");
3814         } else {
3815                 $paging_nav .= " &sdot; next";
3816         }
3817
3818         return $paging_nav;
3819 }
3820
3821 ## ......................................................................
3822 ## functions printing or outputting HTML: div
3823
3824 sub git_print_header_div {
3825         my ($action, $title, $hash, $hash_base) = @_;
3826         my %args = ();
3827
3828         $args{'action'} = $action;
3829         $args{'hash'} = $hash if $hash;
3830         $args{'hash_base'} = $hash_base if $hash_base;
3831
3832         print "<div class=\"header\">\n" .
3833               $cgi->a({-href => href(%args), -class => "title"},
3834               $title ? $title : $action) .
3835               "\n</div>\n";
3836 }
3837
3838 sub format_repo_url {
3839         my ($name, $url) = @_;
3840         return "<tr class=\"metadata_url\"><td>$name</td><td>$url</td></tr>\n";
3841 }
3842
3843 # Group output by placing it in a DIV element and adding a header.
3844 # Options for start_div() can be provided by passing a hash reference as the
3845 # first parameter to the function.
3846 # Options to git_print_header_div() can be provided by passing an array
3847 # reference. This must follow the options to start_div if they are present.
3848 # The content can be a scalar, which is output as-is, a scalar reference, which
3849 # is output after html escaping, an IO handle passed either as *handle or
3850 # *handle{IO}, or a function reference. In the latter case all following
3851 # parameters will be taken as argument to the content function call.
3852 sub git_print_section {
3853         my ($div_args, $header_args, $content);
3854         my $arg = shift;
3855         if (ref($arg) eq 'HASH') {
3856                 $div_args = $arg;
3857                 $arg = shift;
3858         }
3859         if (ref($arg) eq 'ARRAY') {
3860                 $header_args = $arg;
3861                 $arg = shift;
3862         }
3863         $content = $arg;
3864
3865         print $cgi->start_div($div_args);
3866         git_print_header_div(@$header_args);
3867
3868         if (ref($content) eq 'CODE') {
3869                 $content->(@_);
3870         } elsif (ref($content) eq 'SCALAR') {
3871                 print esc_html($$content);
3872         } elsif (ref($content) eq 'GLOB' or ref($content) eq 'IO::Handle') {
3873                 print <$content>;
3874         } elsif (!ref($content) && defined($content)) {
3875                 print $content;
3876         }
3877
3878         print $cgi->end_div;
3879 }
3880
3881 sub print_local_time {
3882         print format_local_time(@_);
3883 }
3884
3885 sub format_local_time {
3886         my $localtime = '';
3887         my %date = @_;
3888         if ($date{'hour_local'} < 6) {
3889                 $localtime .= sprintf(" (<span class=\"atnight\">%02d:%02d</span> %s)",
3890                         $date{'hour_local'}, $date{'minute_local'}, $date{'tz_local'});
3891         } else {
3892                 $localtime .= sprintf(" (%02d:%02d %s)",
3893                         $date{'hour_local'}, $date{'minute_local'}, $date{'tz_local'});
3894         }
3895
3896         return $localtime;
3897 }
3898
3899 # Outputs the author name and date in long form
3900 sub git_print_authorship {
3901         my $co = shift;
3902         my %opts = @_;
3903         my $tag = $opts{-tag} || 'div';
3904         my $author = $co->{'author_name'};
3905
3906         my %ad = parse_date($co->{'author_epoch'}, $co->{'author_tz'});
3907         print "<$tag class=\"author_date\">" .
3908               format_search_author($author, "author", esc_html($author)) .
3909               " [$ad{'rfc2822'}";
3910         print_local_time(%ad) if ($opts{-localtime});
3911         print "]" . git_get_avatar($co->{'author_email'}, -pad_before => 1)
3912                   . "</$tag>\n";
3913 }
3914
3915 # Outputs table rows containing the full author or committer information,
3916 # in the format expected for 'commit' view (& similar).
3917 # Parameters are a commit hash reference, followed by the list of people
3918 # to output information for. If the list is empty it defaults to both
3919 # author and committer.
3920 sub git_print_authorship_rows {
3921         my $co = shift;
3922         # too bad we can't use @people = @_ || ('author', 'committer')
3923         my @people = @_;
3924         @people = ('author', 'committer') unless @people;
3925         foreach my $who (@people) {
3926                 my %wd = parse_date($co->{"${who}_epoch"}, $co->{"${who}_tz"});
3927                 print "<tr><td>$who</td><td>" .
3928                       format_search_author($co->{"${who}_name"}, $who,
3929                                esc_html($co->{"${who}_name"})) . " " .
3930                       format_search_author($co->{"${who}_email"}, $who,
3931                                esc_html("<" . $co->{"${who}_email"} . ">")) .
3932                       "</td><td rowspan=\"2\">" .
3933                       git_get_avatar($co->{"${who}_email"}, -size => 'double') .
3934                       "</td></tr>\n" .
3935                       "<tr>" .
3936                       "<td></td><td> $wd{'rfc2822'}";
3937                 print_local_time(%wd);
3938                 print "</td>" .
3939                       "</tr>\n";
3940         }
3941 }
3942
3943 sub git_print_page_path {
3944         my $name = shift;
3945         my $type = shift;
3946         my $hb = shift;
3947
3948
3949         print "<div class=\"page_path\">";
3950         print $cgi->a({-href => href(action=>"tree", hash_base=>$hb),
3951                       -title => 'tree root'}, to_utf8("[$project]"));
3952         print " / ";
3953         if (defined $name) {
3954                 my @dirname = split '/', $name;
3955                 my $basename = pop @dirname;
3956                 my $fullname = '';
3957
3958                 foreach my $dir (@dirname) {
3959                         $fullname .= ($fullname ? '/' : '') . $dir;
3960                         print $cgi->a({-href => href(action=>"tree", file_name=>$fullname,
3961                                                      hash_base=>$hb),
3962                                       -title => $fullname}, esc_path($dir));
3963                         print " / ";
3964                 }
3965                 if (defined $type && $type eq 'blob') {
3966                         print $cgi->a({-href => href(action=>"blob_plain", file_name=>$file_name,
3967                                                      hash_base=>$hb),
3968                                       -title => $name}, esc_path($basename));
3969                 } elsif (defined $type && $type eq 'tree') {
3970                         print $cgi->a({-href => href(action=>"tree", file_name=>$file_name,
3971                                                      hash_base=>$hb),
3972                                       -title => $name}, esc_path($basename));
3973                         print " / ";
3974                 } else {
3975                         print esc_path($basename);
3976                 }
3977         }
3978         print "<br/></div>\n";
3979 }
3980
3981 sub git_print_log {
3982         my $log = shift;
3983         my %opts = @_;
3984
3985         if ($opts{'-remove_title'}) {
3986                 # remove title, i.e. first line of log
3987                 shift @$log;
3988         }
3989         # remove leading empty lines
3990         while (defined $log->[0] && $log->[0] eq "") {
3991                 shift @$log;
3992         }
3993
3994         # print log
3995         my $signoff = 0;
3996         my $empty = 0;
3997         foreach my $line (@$log) {
3998                 if ($line =~ m/^ *(signed[ \-]off[ \-]by[ :]|acked[ \-]by[ :]|cc[ :])/i) {
3999                         $signoff = 1;
4000                         $empty = 0;
4001                         if (! $opts{'-remove_signoff'}) {
4002                                 print "<span class=\"signoff\">" . esc_html($line) . "</span><br/>\n";
4003                                 next;
4004                         } else {
4005                                 # remove signoff lines
4006                                 next;
4007                         }
4008                 } else {
4009                         $signoff = 0;
4010                 }
4011
4012                 # print only one empty line
4013                 # do not print empty line after signoff
4014                 if ($line eq "") {
4015                         next if ($empty || $signoff);
4016                         $empty = 1;
4017                 } else {
4018                         $empty = 0;
4019                 }
4020
4021                 print format_log_line_html($line) . "<br/>\n";
4022         }
4023
4024         if ($opts{'-final_empty_line'}) {
4025                 # end with single empty line
4026                 print "<br/>\n" unless $empty;
4027         }
4028 }
4029
4030 # return link target (what link points to)
4031 sub git_get_link_target {
4032         my $hash = shift;
4033         my $link_target;
4034
4035         # read link
4036         open my $fd, "-|", git_cmd(), "cat-file", "blob", $hash
4037                 or return;
4038         {
4039                 local $/ = undef;
4040                 $link_target = <$fd>;
4041         }
4042         close $fd
4043                 or return;
4044
4045         return $link_target;
4046 }
4047
4048 # given link target, and the directory (basedir) the link is in,
4049 # return target of link relative to top directory (top tree);
4050 # return undef if it is not possible (including absolute links).
4051 sub normalize_link_target {
4052         my ($link_target, $basedir) = @_;
4053
4054         # absolute symlinks (beginning with '/') cannot be normalized
4055         return if (substr($link_target, 0, 1) eq '/');
4056
4057         # normalize link target to path from top (root) tree (dir)
4058         my $path;
4059         if ($basedir) {
4060                 $path = $basedir . '/' . $link_target;
4061         } else {
4062                 # we are in top (root) tree (dir)
4063                 $path = $link_target;
4064         }
4065
4066         # remove //, /./, and /../
4067         my @path_parts;
4068         foreach my $part (split('/', $path)) {
4069                 # discard '.' and ''
4070                 next if (!$part || $part eq '.');
4071                 # handle '..'
4072                 if ($part eq '..') {
4073                         if (@path_parts) {
4074                                 pop @path_parts;
4075                         } else {
4076                                 # link leads outside repository (outside top dir)
4077                                 return;
4078                         }
4079                 } else {
4080                         push @path_parts, $part;
4081                 }
4082         }
4083         $path = join('/', @path_parts);
4084
4085         return $path;
4086 }
4087
4088 # print tree entry (row of git_tree), but without encompassing <tr> element
4089 sub git_print_tree_entry {
4090         my ($t, $basedir, $hash_base, $have_blame) = @_;
4091
4092         my %base_key = ();
4093         $base_key{'hash_base'} = $hash_base if defined $hash_base;
4094
4095         # The format of a table row is: mode list link.  Where mode is
4096         # the mode of the entry, list is the name of the entry, an href,
4097         # and link is the action links of the entry.
4098
4099         print "<td class=\"mode\">" . mode_str($t->{'mode'}) . "</td>\n";
4100         if (exists $t->{'size'}) {
4101                 print "<td class=\"size\">$t->{'size'}</td>\n";
4102         }
4103         if ($t->{'type'} eq "blob") {
4104                 print "<td class=\"list\">" .
4105                         $cgi->a({-href => href(action=>"blob", hash=>$t->{'hash'},
4106                                                file_name=>"$basedir$t->{'name'}", %base_key),
4107                                 -class => "list"}, esc_path($t->{'name'}));
4108                 if (S_ISLNK(oct $t->{'mode'})) {
4109                         my $link_target = git_get_link_target($t->{'hash'});
4110                         if ($link_target) {
4111                                 my $norm_target = normalize_link_target($link_target, $basedir);
4112                                 if (defined $norm_target) {
4113                                         print " -> " .
4114                                               $cgi->a({-href => href(action=>"object", hash_base=>$hash_base,
4115                                                                      file_name=>$norm_target),
4116                                                        -title => $norm_target}, esc_path($link_target));
4117                                 } else {
4118                                         print " -> " . esc_path($link_target);
4119                                 }
4120                         }
4121                 }
4122                 print "</td>\n";
4123                 print "<td class=\"link\">";
4124                 print $cgi->a({-href => href(action=>"blob", hash=>$t->{'hash'},
4125                                              file_name=>"$basedir$t->{'name'}", %base_key)},
4126                               "blob");
4127                 if ($have_blame) {
4128                         print " | " .
4129                               $cgi->a({-href => href(action=>"blame", hash=>$t->{'hash'},
4130                                                      file_name=>"$basedir$t->{'name'}", %base_key)},
4131                                       "blame");
4132                 }
4133                 if (defined $hash_base) {
4134                         print " | " .
4135                               $cgi->a({-href => href(action=>"history", hash_base=>$hash_base,
4136                                                      hash=>$t->{'hash'}, file_name=>"$basedir$t->{'name'}")},
4137                                       "history");
4138                 }
4139                 print " | " .
4140                         $cgi->a({-href => href(action=>"blob_plain", hash_base=>$hash_base,
4141                                                file_name=>"$basedir$t->{'name'}")},
4142                                 "raw");
4143                 print "</td>\n";
4144
4145         } elsif ($t->{'type'} eq "tree") {
4146                 print "<td class=\"list\">";
4147                 print $cgi->a({-href => href(action=>"tree", hash=>$t->{'hash'},
4148                                              file_name=>"$basedir$t->{'name'}",
4149                                              %base_key)},
4150                               esc_path($t->{'name'}));
4151                 print "</td>\n";
4152                 print "<td class=\"link\">";
4153                 print $cgi->a({-href => href(action=>"tree", hash=>$t->{'hash'},
4154                                              file_name=>"$basedir$t->{'name'}",
4155                                              %base_key)},
4156                               "tree");
4157                 if (defined $hash_base) {
4158                         print " | " .
4159                               $cgi->a({-href => href(action=>"history", hash_base=>$hash_base,
4160                                                      file_name=>"$basedir$t->{'name'}")},
4161                                       "history");
4162                 }
4163                 print "</td>\n";
4164         } else {
4165                 # unknown object: we can only present history for it
4166                 # (this includes 'commit' object, i.e. submodule support)
4167                 print "<td class=\"list\">" .
4168                       esc_path($t->{'name'}) .
4169                       "</td>\n";
4170                 print "<td class=\"link\">";
4171                 if (defined $hash_base) {
4172                         print $cgi->a({-href => href(action=>"history",
4173                                                      hash_base=>$hash_base,
4174                                                      file_name=>"$basedir$t->{'name'}")},
4175                                       "history");
4176                 }
4177                 print "</td>\n";
4178         }
4179 }
4180
4181 ## ......................................................................
4182 ## functions printing large fragments of HTML
4183
4184 # get pre-image filenames for merge (combined) diff
4185 sub fill_from_file_info {
4186         my ($diff, @parents) = @_;
4187
4188         $diff->{'from_file'} = [ ];
4189         $diff->{'from_file'}[$diff->{'nparents'} - 1] = undef;
4190         for (my $i = 0; $i < $diff->{'nparents'}; $i++) {
4191                 if ($diff->{'status'}[$i] eq 'R' ||
4192                     $diff->{'status'}[$i] eq 'C') {
4193                         $diff->{'from_file'}[$i] =
4194                                 git_get_path_by_hash($parents[$i], $diff->{'from_id'}[$i]);
4195                 }
4196         }
4197
4198         return $diff;
4199 }
4200
4201 # is current raw difftree line of file deletion
4202 sub is_deleted {
4203         my $diffinfo = shift;
4204
4205         return $diffinfo->{'to_id'} eq ('0' x 40);
4206 }
4207
4208 # does patch correspond to [previous] difftree raw line
4209 # $diffinfo  - hashref of parsed raw diff format
4210 # $patchinfo - hashref of parsed patch diff format
4211 #              (the same keys as in $diffinfo)
4212 sub is_patch_split {
4213         my ($diffinfo, $patchinfo) = @_;
4214
4215         return defined $diffinfo && defined $patchinfo
4216                 && $diffinfo->{'to_file'} eq $patchinfo->{'to_file'};
4217 }
4218
4219
4220 sub git_difftree_body {
4221         my ($difftree, $hash, @parents) = @_;
4222         my ($parent) = $parents[0];
4223         my $have_blame = gitweb_check_feature('blame');
4224         print "<div class=\"list_head\">\n";
4225         if ($#{$difftree} > 10) {
4226                 print(($#{$difftree} + 1) . " files changed:\n");
4227         }
4228         print "</div>\n";
4229
4230         print "<table class=\"" .
4231               (@parents > 1 ? "combined " : "") .
4232               "diff_tree\">\n";
4233
4234         # header only for combined diff in 'commitdiff' view
4235         my $has_header = @$difftree && @parents > 1 && $action eq 'commitdiff';
4236         if ($has_header) {
4237                 # table header
4238                 print "<thead><tr>\n" .
4239                        "<th></th><th></th>\n"; # filename, patchN link
4240                 for (my $i = 0; $i < @parents; $i++) {
4241                         my $par = $parents[$i];
4242                         print "<th>" .
4243                               $cgi->a({-href => href(action=>"commitdiff",
4244                                                      hash=>$hash, hash_parent=>$par),
4245                                        -title => 'commitdiff to parent number ' .
4246                                                   ($i+1) . ': ' . substr($par,0,7)},
4247                                       $i+1) .
4248                               "&nbsp;</th>\n";
4249                 }
4250                 print "</tr></thead>\n<tbody>\n";
4251         }
4252
4253         my $alternate = 1;
4254         my $patchno = 0;
4255         foreach my $line (@{$difftree}) {
4256                 my $diff = parsed_difftree_line($line);
4257
4258                 if ($alternate) {
4259                         print "<tr class=\"dark\">\n";
4260                 } else {
4261                         print "<tr class=\"light\">\n";
4262                 }
4263                 $alternate ^= 1;
4264
4265                 if (exists $diff->{'nparents'}) { # combined diff
4266
4267                         fill_from_file_info($diff, @parents)
4268                                 unless exists $diff->{'from_file'};
4269
4270                         if (!is_deleted($diff)) {
4271                                 # file exists in the result (child) commit
4272                                 print "<td>" .
4273                                       $cgi->a({-href => href(action=>"blob", hash=>$diff->{'to_id'},
4274                                                              file_name=>$diff->{'to_file'},
4275                                                              hash_base=>$hash),
4276                                               -class => "list"}, esc_path($diff->{'to_file'})) .
4277                                       "</td>\n";
4278                         } else {
4279                                 print "<td>" .
4280                                       esc_path($diff->{'to_file'}) .
4281                                       "</td>\n";
4282                         }
4283
4284                         if ($action eq 'commitdiff') {
4285                                 # link to patch
4286                                 $patchno++;
4287                                 print "<td class=\"link\">" .
4288                                       $cgi->a({-href => "#patch$patchno"}, "patch") .
4289                                       " | " .
4290                                       "</td>\n";
4291                         }
4292
4293                         my $has_history = 0;
4294                         my $not_deleted = 0;
4295                         for (my $i = 0; $i < $diff->{'nparents'}; $i++) {
4296                                 my $hash_parent = $parents[$i];
4297                                 my $from_hash = $diff->{'from_id'}[$i];
4298                                 my $from_path = $diff->{'from_file'}[$i];
4299                                 my $status = $diff->{'status'}[$i];
4300
4301                                 $has_history ||= ($status ne 'A');
4302                                 $not_deleted ||= ($status ne 'D');
4303
4304                                 if ($status eq 'A') {
4305                                         print "<td  class=\"link\" align=\"right\"> | </td>\n";
4306                                 } elsif ($status eq 'D') {
4307                                         print "<td class=\"link\">" .
4308                                               $cgi->a({-href => href(action=>"blob",
4309                                                                      hash_base=>$hash,
4310                                                                      hash=>$from_hash,
4311                                                                      file_name=>$from_path)},
4312                                                       "blob" . ($i+1)) .
4313                                               " | </td>\n";
4314                                 } else {
4315                                         if ($diff->{'to_id'} eq $from_hash) {
4316                                                 print "<td class=\"link nochange\">";
4317                                         } else {
4318                                                 print "<td class=\"link\">";
4319                                         }
4320                                         print $cgi->a({-href => href(action=>"blobdiff",
4321                                                                      hash=>$diff->{'to_id'},
4322                                                                      hash_parent=>$from_hash,
4323                                                                      hash_base=>$hash,
4324                                                                      hash_parent_base=>$hash_parent,
4325                                                                      file_name=>$diff->{'to_file'},
4326                                                                      file_parent=>$from_path)},
4327                                                       "diff" . ($i+1)) .
4328                                               " | </td>\n";
4329                                 }
4330                         }
4331
4332                         print "<td class=\"link\">";
4333                         if ($not_deleted) {
4334                                 print $cgi->a({-href => href(action=>"blob",
4335                                                              hash=>$diff->{'to_id'},
4336                                                              file_name=>$diff->{'to_file'},
4337                                                              hash_base=>$hash)},
4338                                               "blob");
4339                                 print " | " if ($has_history);
4340                         }
4341                         if ($has_history) {
4342                                 print $cgi->a({-href => href(action=>"history",
4343                                                              file_name=>$diff->{'to_file'},
4344                                                              hash_base=>$hash)},
4345                                               "history");
4346                         }
4347                         print "</td>\n";
4348
4349                         print "</tr>\n";
4350                         next; # instead of 'else' clause, to avoid extra indent
4351                 }
4352                 # else ordinary diff
4353
4354                 my ($to_mode_oct, $to_mode_str, $to_file_type);
4355                 my ($from_mode_oct, $from_mode_str, $from_file_type);
4356                 if ($diff->{'to_mode'} ne ('0' x 6)) {
4357                         $to_mode_oct = oct $diff->{'to_mode'};
4358                         if (S_ISREG($to_mode_oct)) { # only for regular file
4359                                 $to_mode_str = sprintf("%04o", $to_mode_oct & 0777); # permission bits
4360                         }
4361                         $to_file_type = file_type($diff->{'to_mode'});
4362                 }
4363                 if ($diff->{'from_mode'} ne ('0' x 6)) {
4364                         $from_mode_oct = oct $diff->{'from_mode'};
4365                         if (S_ISREG($to_mode_oct)) { # only for regular file
4366                                 $from_mode_str = sprintf("%04o", $from_mode_oct & 0777); # permission bits
4367                         }
4368                         $from_file_type = file_type($diff->{'from_mode'});
4369                 }
4370
4371                 if ($diff->{'status'} eq "A") { # created
4372                         my $mode_chng = "<span class=\"file_status new\">[new $to_file_type";
4373                         $mode_chng   .= " with mode: $to_mode_str" if $to_mode_str;
4374                         $mode_chng   .= "]</span>";
4375                         print "<td>";
4376                         print $cgi->a({-href => href(action=>"blob", hash=>$diff->{'to_id'},
4377                                                      hash_base=>$hash, file_name=>$diff->{'file'}),
4378                                       -class => "list"}, esc_path($diff->{'file'}));
4379                         print "</td>\n";
4380                         print "<td>$mode_chng</td>\n";
4381                         print "<td class=\"link\">";
4382                         if ($action eq 'commitdiff') {
4383                                 # link to patch
4384                                 $patchno++;
4385                                 print $cgi->a({-href => "#patch$patchno"}, "patch");
4386                                 print " | ";
4387                         }
4388                         print $cgi->a({-href => href(action=>"blob", hash=>$diff->{'to_id'},
4389                                                      hash_base=>$hash, file_name=>$diff->{'file'})},
4390                                       "blob");
4391                         print "</td>\n";
4392
4393                 } elsif ($diff->{'status'} eq "D") { # deleted
4394                         my $mode_chng = "<span class=\"file_status deleted\">[deleted $from_file_type]</span>";
4395                         print "<td>";
4396                         print $cgi->a({-href => href(action=>"blob", hash=>$diff->{'from_id'},
4397                                                      hash_base=>$parent, file_name=>$diff->{'file'}),
4398                                        -class => "list"}, esc_path($diff->{'file'}));
4399                         print "</td>\n";
4400                         print "<td>$mode_chng</td>\n";
4401                         print "<td class=\"link\">";
4402                         if ($action eq 'commitdiff') {
4403                                 # link to patch
4404                                 $patchno++;
4405                                 print $cgi->a({-href => "#patch$patchno"}, "patch");
4406                                 print " | ";
4407                         }
4408                         print $cgi->a({-href => href(action=>"blob", hash=>$diff->{'from_id'},
4409                                                      hash_base=>$parent, file_name=>$diff->{'file'})},
4410                                       "blob") . " | ";
4411                         if ($have_blame) {
4412                                 print $cgi->a({-href => href(action=>"blame", hash_base=>$parent,
4413                                                              file_name=>$diff->{'file'})},
4414                                               "blame") . " | ";
4415                         }
4416                         print $cgi->a({-href => href(action=>"history", hash_base=>$parent,
4417                                                      file_name=>$diff->{'file'})},
4418                                       "history");
4419                         print "</td>\n";
4420
4421                 } elsif ($diff->{'status'} eq "M" || $diff->{'status'} eq "T") { # modified, or type changed
4422                         my $mode_chnge = "";
4423                         if ($diff->{'from_mode'} != $diff->{'to_mode'}) {
4424                                 $mode_chnge = "<span class=\"file_status mode_chnge\">[changed";
4425                                 if ($from_file_type ne $to_file_type) {
4426                                         $mode_chnge .= " from $from_file_type to $to_file_type";
4427                                 }
4428                                 if (($from_mode_oct & 0777) != ($to_mode_oct & 0777)) {
4429                                         if ($from_mode_str && $to_mode_str) {
4430                                                 $mode_chnge .= " mode: $from_mode_str->$to_mode_str";
4431                                         } elsif ($to_mode_str) {
4432                                                 $mode_chnge .= " mode: $to_mode_str";
4433                                         }
4434                                 }
4435                                 $mode_chnge .= "]</span>\n";
4436                         }
4437                         print "<td>";
4438                         print $cgi->a({-href => href(action=>"blob", hash=>$diff->{'to_id'},
4439                                                      hash_base=>$hash, file_name=>$diff->{'file'}),
4440                                       -class => "list"}, esc_path($diff->{'file'}));
4441                         print "</td>\n";
4442                         print "<td>$mode_chnge</td>\n";
4443                         print "<td class=\"link\">";
4444                         if ($action eq 'commitdiff') {
4445                                 # link to patch
4446                                 $patchno++;
4447                                 print $cgi->a({-href => "#patch$patchno"}, "patch") .
4448                                       " | ";
4449                         } elsif ($diff->{'to_id'} ne $diff->{'from_id'}) {
4450                                 # "commit" view and modified file (not onlu mode changed)
4451                                 print $cgi->a({-href => href(action=>"blobdiff",
4452                                                              hash=>$diff->{'to_id'}, hash_parent=>$diff->{'from_id'},
4453                                                              hash_base=>$hash, hash_parent_base=>$parent,
4454                                                              file_name=>$diff->{'file'})},
4455                                               "diff") .
4456                                       " | ";
4457                         }
4458                         print $cgi->a({-href => href(action=>"blob", hash=>$diff->{'to_id'},
4459                                                      hash_base=>$hash, file_name=>$diff->{'file'})},
4460                                        "blob") . " | ";
4461                         if ($have_blame) {
4462                                 print $cgi->a({-href => href(action=>"blame", hash_base=>$hash,
4463                                                              file_name=>$diff->{'file'})},
4464                                               "blame") . " | ";
4465                         }
4466                         print $cgi->a({-href => href(action=>"history", hash_base=>$hash,
4467                                                      file_name=>$diff->{'file'})},
4468                                       "history");
4469                         print "</td>\n";
4470
4471                 } elsif ($diff->{'status'} eq "R" || $diff->{'status'} eq "C") { # renamed or copied
4472                         my %status_name = ('R' => 'moved', 'C' => 'copied');
4473                         my $nstatus = $status_name{$diff->{'status'}};
4474                         my $mode_chng = "";
4475                         if ($diff->{'from_mode'} != $diff->{'to_mode'}) {
4476                                 # mode also for directories, so we cannot use $to_mode_str
4477                                 $mode_chng = sprintf(", mode: %04o", $to_mode_oct & 0777);
4478                         }
4479                         print "<td>" .
4480                               $cgi->a({-href => href(action=>"blob", hash_base=>$hash,
4481                                                      hash=>$diff->{'to_id'}, file_name=>$diff->{'to_file'}),
4482                                       -class => "list"}, esc_path($diff->{'to_file'})) . "</td>\n" .
4483                               "<td><span class=\"file_status $nstatus\">[$nstatus from " .
4484                               $cgi->a({-href => href(action=>"blob", hash_base=>$parent,
4485                                                      hash=>$diff->{'from_id'}, file_name=>$diff->{'from_file'}),
4486                                       -class => "list"}, esc_path($diff->{'from_file'})) .
4487                               " with " . (int $diff->{'similarity'}) . "% similarity$mode_chng]</span></td>\n" .
4488                               "<td class=\"link\">";
4489                         if ($action eq 'commitdiff') {
4490                                 # link to patch
4491                                 $patchno++;
4492                                 print $cgi->a({-href => "#patch$patchno"}, "patch") .
4493                                       " | ";
4494                         } elsif ($diff->{'to_id'} ne $diff->{'from_id'}) {
4495                                 # "commit" view and modified file (not only pure rename or copy)
4496                                 print $cgi->a({-href => href(action=>"blobdiff",
4497                                                              hash=>$diff->{'to_id'}, hash_parent=>$diff->{'from_id'},
4498                                                              hash_base=>$hash, hash_parent_base=>$parent,
4499                                                              file_name=>$diff->{'to_file'}, file_parent=>$diff->{'from_file'})},
4500                                               "diff") .
4501                                       " | ";
4502                         }
4503                         print $cgi->a({-href => href(action=>"blob", hash=>$diff->{'to_id'},
4504                                                      hash_base=>$parent, file_name=>$diff->{'to_file'})},
4505                                       "blob") . " | ";
4506                         if ($have_blame) {
4507                                 print $cgi->a({-href => href(action=>"blame", hash_base=>$hash,
4508                                                              file_name=>$diff->{'to_file'})},
4509                                               "blame") . " | ";
4510                         }
4511                         print $cgi->a({-href => href(action=>"history", hash_base=>$hash,
4512                                                     file_name=>$diff->{'to_file'})},
4513                                       "history");
4514                         print "</td>\n";
4515
4516                 } # we should not encounter Unmerged (U) or Unknown (X) status
4517                 print "</tr>\n";
4518         }
4519         print "</tbody>" if $has_header;
4520         print "</table>\n";
4521 }
4522
4523 sub git_patchset_body {
4524         my ($fd, $difftree, $hash, @hash_parents) = @_;
4525         my ($hash_parent) = $hash_parents[0];
4526
4527         my $is_combined = (@hash_parents > 1);
4528         my $patch_idx = 0;
4529         my $patch_number = 0;
4530         my $patch_line;
4531         my $diffinfo;
4532         my $to_name;
4533         my (%from, %to);
4534
4535         print "<div class=\"patchset\">\n";
4536
4537         # skip to first patch
4538         while ($patch_line = <$fd>) {
4539                 chomp $patch_line;
4540
4541                 last if ($patch_line =~ m/^diff /);
4542         }
4543
4544  PATCH:
4545         while ($patch_line) {
4546
4547                 # parse "git diff" header line
4548                 if ($patch_line =~ m/^diff --git (\"(?:[^\\\"]*(?:\\.[^\\\"]*)*)\"|[^ "]*) (.*)$/) {
4549                         # $1 is from_name, which we do not use
4550                         $to_name = unquote($2);
4551                         $to_name =~ s!^b/!!;
4552                 } elsif ($patch_line =~ m/^diff --(cc|combined) ("?.*"?)$/) {
4553                         # $1 is 'cc' or 'combined', which we do not use
4554                         $to_name = unquote($2);
4555                 } else {
4556                         $to_name = undef;
4557                 }
4558
4559                 # check if current patch belong to current raw line
4560                 # and parse raw git-diff line if needed
4561                 if (is_patch_split($diffinfo, { 'to_file' => $to_name })) {
4562                         # this is continuation of a split patch
4563                         print "<div class=\"patch cont\">\n";
4564                 } else {
4565                         # advance raw git-diff output if needed
4566                         $patch_idx++ if defined $diffinfo;
4567
4568                         # read and prepare patch information
4569                         $diffinfo = parsed_difftree_line($difftree->[$patch_idx]);
4570
4571                         # compact combined diff output can have some patches skipped
4572                         # find which patch (using pathname of result) we are at now;
4573                         if ($is_combined) {
4574                                 while ($to_name ne $diffinfo->{'to_file'}) {
4575                                         print "<div class=\"patch\" id=\"patch". ($patch_idx+1) ."\">\n" .
4576                                               format_diff_cc_simplified($diffinfo, @hash_parents) .
4577                                               "</div>\n";  # class="patch"
4578
4579                                         $patch_idx++;
4580                                         $patch_number++;
4581
4582                                         last if $patch_idx > $#$difftree;
4583                                         $diffinfo = parsed_difftree_line($difftree->[$patch_idx]);
4584                                 }
4585                         }
4586
4587                         # modifies %from, %to hashes
4588                         parse_from_to_diffinfo($diffinfo, \%from, \%to, @hash_parents);
4589
4590                         # this is first patch for raw difftree line with $patch_idx index
4591                         # we index @$difftree array from 0, but number patches from 1
4592                         print "<div class=\"patch\" id=\"patch". ($patch_idx+1) ."\">\n";
4593                 }
4594
4595                 # git diff header
4596                 #assert($patch_line =~ m/^diff /) if DEBUG;
4597                 #assert($patch_line !~ m!$/$!) if DEBUG; # is chomp-ed
4598                 $patch_number++;
4599                 # print "git diff" header
4600                 print format_git_diff_header_line($patch_line, $diffinfo,
4601                                                   \%from, \%to);
4602
4603                 # print extended diff header
4604                 print "<div class=\"diff extended_header\">\n";
4605         EXTENDED_HEADER:
4606                 while ($patch_line = <$fd>) {
4607                         chomp $patch_line;
4608
4609                         last EXTENDED_HEADER if ($patch_line =~ m/^--- |^diff /);
4610
4611                         print format_extended_diff_header_line($patch_line, $diffinfo,
4612                                                                \%from, \%to);
4613                 }
4614                 print "</div>\n"; # class="diff extended_header"
4615
4616                 # from-file/to-file diff header
4617                 if (! $patch_line) {
4618                         print "</div>\n"; # class="patch"
4619                         last PATCH;
4620                 }
4621                 next PATCH if ($patch_line =~ m/^diff /);
4622                 #assert($patch_line =~ m/^---/) if DEBUG;
4623
4624                 my $last_patch_line = $patch_line;
4625                 $patch_line = <$fd>;
4626                 chomp $patch_line;
4627                 #assert($patch_line =~ m/^\+\+\+/) if DEBUG;
4628
4629                 print format_diff_from_to_header($last_patch_line, $patch_line,
4630                                                  $diffinfo, \%from, \%to,
4631                                                  @hash_parents);
4632
4633                 # the patch itself
4634         LINE:
4635                 while ($patch_line = <$fd>) {
4636                         chomp $patch_line;
4637
4638                         next PATCH if ($patch_line =~ m/^diff /);
4639
4640                         print format_diff_line($patch_line, \%from, \%to);
4641                 }
4642
4643         } continue {
4644                 print "</div>\n"; # class="patch"
4645         }
4646
4647         # for compact combined (--cc) format, with chunk and patch simplification
4648         # the patchset might be empty, but there might be unprocessed raw lines
4649         for (++$patch_idx if $patch_number > 0;
4650              $patch_idx < @$difftree;
4651              ++$patch_idx) {
4652                 # read and prepare patch information
4653                 $diffinfo = parsed_difftree_line($difftree->[$patch_idx]);
4654
4655                 # generate anchor for "patch" links in difftree / whatchanged part
4656                 print "<div class=\"patch\" id=\"patch". ($patch_idx+1) ."\">\n" .
4657                       format_diff_cc_simplified($diffinfo, @hash_parents) .
4658                       "</div>\n";  # class="patch"
4659
4660                 $patch_number++;
4661         }
4662
4663         if ($patch_number == 0) {
4664                 if (@hash_parents > 1) {
4665                         print "<div class=\"diff nodifferences\">Trivial merge</div>\n";
4666                 } else {
4667                         print "<div class=\"diff nodifferences\">No differences found</div>\n";
4668                 }
4669         }
4670
4671         print "</div>\n"; # class="patchset"
4672 }
4673
4674 # . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
4675
4676 # fills project list info (age, description, owner, forks) for each
4677 # project in the list, removing invalid projects from returned list
4678 # NOTE: modifies $projlist, but does not remove entries from it
4679 sub fill_project_list_info {
4680         my ($projlist, $check_forks) = @_;
4681         my @projects;
4682
4683         my $show_ctags = gitweb_check_feature('ctags');
4684  PROJECT:
4685         foreach my $pr (@$projlist) {
4686                 my (@activity) = git_get_last_activity($pr->{'path'});
4687                 unless (@activity) {
4688                         next PROJECT;
4689                 }
4690                 ($pr->{'age'}, $pr->{'age_string'}) = @activity;
4691                 if (!defined $pr->{'descr'}) {
4692                         my $descr = git_get_project_description($pr->{'path'}) || "";
4693                         $descr = to_utf8($descr);
4694                         $pr->{'descr_long'} = $descr;
4695                         $pr->{'descr'} = chop_str($descr, $projects_list_description_width, 5);
4696                 }
4697                 if (!defined $pr->{'owner'}) {
4698                         $pr->{'owner'} = git_get_project_owner("$pr->{'path'}") || "";
4699                 }
4700                 if ($check_forks) {
4701                         my $pname = $pr->{'path'};
4702                         if (($pname =~ s/\.git$//) &&
4703                             ($pname !~ /\/$/) &&
4704                             (-d "$projectroot/$pname")) {
4705                                 $pr->{'forks'} = "-d $projectroot/$pname";
4706                         } else {
4707                                 $pr->{'forks'} = 0;
4708                         }
4709                 }
4710                 $show_ctags and $pr->{'ctags'} = git_get_project_ctags($pr->{'path'});
4711                 push @projects, $pr;
4712         }
4713
4714         return @projects;
4715 }
4716
4717 # print 'sort by' <th> element, generating 'sort by $name' replay link
4718 # if that order is not selected
4719 sub print_sort_th {
4720         print format_sort_th(@_);
4721 }
4722
4723 sub format_sort_th {
4724         my ($name, $order, $header) = @_;
4725         my $sort_th = "";
4726         $header ||= ucfirst($name);
4727
4728         if ($order eq $name) {
4729                 $sort_th .= "<th>$header</th>\n";
4730         } else {
4731                 $sort_th .= "<th>" .
4732                             $cgi->a({-href => href(-replay=>1, order=>$name),
4733                                      -class => "header"}, $header) .
4734                             "</th>\n";
4735         }
4736
4737         return $sort_th;
4738 }
4739
4740 sub git_project_list_body {
4741         # actually uses global variable $project
4742         my ($projlist, $order, $from, $to, $extra, $no_header) = @_;
4743
4744         my $check_forks = gitweb_check_feature('forks');
4745         my @projects = fill_project_list_info($projlist, $check_forks);
4746
4747         $order ||= $default_projects_order;
4748         $from = 0 unless defined $from;
4749         $to = $#projects if (!defined $to || $#projects < $to);
4750
4751         my %order_info = (
4752                 project => { key => 'path', type => 'str' },
4753                 descr => { key => 'descr_long', type => 'str' },
4754                 owner => { key => 'owner', type => 'str' },
4755                 age => { key => 'age', type => 'num' }
4756         );
4757         my $oi = $order_info{$order};
4758         if ($oi->{'type'} eq 'str') {
4759                 @projects = sort {$a->{$oi->{'key'}} cmp $b->{$oi->{'key'}}} @projects;
4760         } else {
4761                 @projects = sort {$a->{$oi->{'key'}} <=> $b->{$oi->{'key'}}} @projects;
4762         }
4763
4764         my $show_ctags = gitweb_check_feature('ctags');
4765         if ($show_ctags) {
4766                 my %ctags;
4767                 foreach my $p (@projects) {
4768                         foreach my $ct (keys %{$p->{'ctags'}}) {
4769                                 $ctags{$ct} += $p->{'ctags'}->{$ct};
4770                         }
4771                 }
4772                 my $cloud = git_populate_project_tagcloud(\%ctags);
4773                 print git_show_project_tagcloud($cloud, 64);
4774         }
4775
4776         print "<table class=\"project_list\">\n";
4777         unless ($no_header) {
4778                 print "<tr>\n";
4779                 if ($check_forks) {
4780                         print "<th></th>\n";
4781                 }
4782                 print_sort_th('project', $order, 'Project');
4783                 print_sort_th('descr', $order, 'Description');
4784                 print_sort_th('owner', $order, 'Owner');
4785                 print_sort_th('age', $order, 'Last Change');
4786                 print "<th></th>\n" . # for links
4787                       "</tr>\n";
4788         }
4789         my $alternate = 1;
4790         my $tagfilter = $cgi->param('by_tag');
4791         for (my $i = $from; $i <= $to; $i++) {
4792                 my $pr = $projects[$i];
4793
4794                 next if $tagfilter and $show_ctags and not grep { lc $_ eq lc $tagfilter } keys %{$pr->{'ctags'}};
4795                 next if $searchtext and not $pr->{'path'} =~ /$searchtext/
4796                         and not $pr->{'descr_long'} =~ /$searchtext/;
4797                 # Weed out forks or non-matching entries of search
4798                 if ($check_forks) {
4799                         my $forkbase = $project; $forkbase ||= ''; $forkbase =~ s#\.git$#/#;
4800                         $forkbase="^$forkbase" if $forkbase;
4801                         next if not $searchtext and not $tagfilter and $show_ctags
4802                                 and $pr->{'path'} =~ m#$forkbase.*/.*#; # regexp-safe
4803                 }
4804
4805                 if ($alternate) {
4806                         print "<tr class=\"dark\">\n";
4807                 } else {
4808                         print "<tr class=\"light\">\n";
4809                 }
4810                 $alternate ^= 1;
4811                 if ($check_forks) {
4812                         print "<td>";
4813                         if ($pr->{'forks'}) {
4814                                 print "<!-- $pr->{'forks'} -->\n";
4815                                 print $cgi->a({-href => href(project=>$pr->{'path'}, action=>"forks")}, "+");
4816                         }
4817                         print "</td>\n";
4818                 }
4819                 print "<td>" . $cgi->a({-href => href(project=>$pr->{'path'}, action=>"summary"),
4820                                         -class => "list"}, esc_html($pr->{'path'})) . "</td>\n" .
4821                       "<td>" . $cgi->a({-href => href(project=>$pr->{'path'}, action=>"summary"),
4822                                         -class => "list", -title => $pr->{'descr_long'}},
4823                                         esc_html($pr->{'descr'})) . "</td>\n" .
4824                       "<td><i>" . chop_and_escape_str($pr->{'owner'}, 15) . "</i></td>\n";
4825                 print "<td class=\"". age_class($pr->{'age'}) . "\">" .
4826                       (defined $pr->{'age_string'} ? $pr->{'age_string'} : "No commits") . "</td>\n" .
4827                       "<td class=\"link\">" .
4828                       $cgi->a({-href => href(project=>$pr->{'path'}, action=>"summary")}, "summary")   . " | " .
4829                       $cgi->a({-href => href(project=>$pr->{'path'}, action=>"shortlog")}, "shortlog") . " | " .
4830                       $cgi->a({-href => href(project=>$pr->{'path'}, action=>"log")}, "log") . " | " .
4831                       $cgi->a({-href => href(project=>$pr->{'path'}, action=>"tree")}, "tree") .
4832                       ($pr->{'forks'} ? " | " . $cgi->a({-href => href(project=>$pr->{'path'}, action=>"forks")}, "forks") : '') .
4833                       "</td>\n" .
4834                       "</tr>\n";
4835         }
4836         if (defined $extra) {
4837                 print "<tr>\n";
4838                 if ($check_forks) {
4839                         print "<td></td>\n";
4840                 }
4841                 print "<td colspan=\"5\">$extra</td>\n" .
4842                       "</tr>\n";
4843         }
4844         print "</table>\n";
4845 }
4846
4847 sub git_log_body {
4848         # uses global variable $project
4849         my ($commitlist, $from, $to, $refs, $extra) = @_;
4850
4851         $from = 0 unless defined $from;
4852         $to = $#{$commitlist} if (!defined $to || $#{$commitlist} < $to);
4853
4854         for (my $i = 0; $i <= $to; $i++) {
4855                 my %co = %{$commitlist->[$i]};
4856                 next if !%co;
4857                 my $commit = $co{'id'};
4858                 my $ref = format_ref_marker($refs, $commit);
4859                 my %ad = parse_date($co{'author_epoch'});
4860                 git_print_header_div('commit',
4861                                "<span class=\"age\">$co{'age_string'}</span>" .
4862                                esc_html($co{'title'}) . $ref,
4863                                $commit);
4864                 print "<div class=\"title_text\">\n" .
4865                       "<div class=\"log_link\">\n" .
4866                       $cgi->a({-href => href(action=>"commit", hash=>$commit)}, "commit") .
4867                       " | " .
4868                       $cgi->a({-href => href(action=>"commitdiff", hash=>$commit)}, "commitdiff") .
4869                       " | " .
4870                       $cgi->a({-href => href(action=>"tree", hash=>$commit, hash_base=>$commit)}, "tree") .
4871                       "<br/>\n" .
4872                       "</div>\n";
4873                       git_print_authorship(\%co, -tag => 'span');
4874                       print "<br/>\n</div>\n";
4875
4876                 print "<div class=\"log_body\">\n";
4877                 git_print_log($co{'comment'}, -final_empty_line=> 1);
4878                 print "</div>\n";
4879         }
4880         if ($extra) {
4881                 print "<div class=\"page_nav\">\n";
4882                 print "$extra\n";
4883                 print "</div>\n";
4884         }
4885 }
4886
4887 sub git_shortlog_body {
4888         # uses global variable $project
4889         my ($commitlist, $from, $to, $refs, $extra) = @_;
4890
4891         $from = 0 unless defined $from;
4892         $to = $#{$commitlist} if (!defined $to || $#{$commitlist} < $to);
4893
4894         print "<table class=\"shortlog\">\n";
4895         my $alternate = 1;
4896         for (my $i = $from; $i <= $to; $i++) {
4897                 my %co = %{$commitlist->[$i]};
4898                 my $commit = $co{'id'};
4899                 my $ref = format_ref_marker($refs, $commit);
4900                 if ($alternate) {
4901                         print "<tr class=\"dark\">\n";
4902                 } else {
4903                         print "<tr class=\"light\">\n";
4904                 }
4905                 $alternate ^= 1;
4906                 # git_summary() used print "<td><i>$co{'age_string'}</i></td>\n" .
4907                 print "<td title=\"$co{'age_string_age'}\"><i>$co{'age_string_date'}</i></td>\n" .
4908                       format_author_html('td', \%co, 10) . "<td>";
4909                 print format_subject_html($co{'title'}, $co{'title_short'},
4910                                           href(action=>"commit", hash=>$commit), $ref);
4911                 print "</td>\n" .
4912                       "<td class=\"link\">" .
4913                       $cgi->a({-href => href(action=>"commit", hash=>$commit)}, "commit") . " | " .
4914                       $cgi->a({-href => href(action=>"commitdiff", hash=>$commit)}, "commitdiff") . " | " .
4915                       $cgi->a({-href => href(action=>"tree", hash=>$commit, hash_base=>$commit)}, "tree");
4916                 my $snapshot_links = format_snapshot_links($commit);
4917                 if (defined $snapshot_links) {
4918                         print " | " . $snapshot_links;
4919                 }
4920                 print "</td>\n" .
4921                       "</tr>\n";
4922         }
4923         if (defined $extra) {
4924                 print "<tr>\n" .
4925                       "<td colspan=\"4\">$extra</td>\n" .
4926                       "</tr>\n";
4927         }
4928         print "</table>\n";
4929 }
4930
4931 sub git_history_body {
4932         # Warning: assumes constant type (blob or tree) during history
4933         my ($commitlist, $from, $to, $refs, $extra,
4934             $file_name, $file_hash, $ftype) = @_;
4935
4936         $from = 0 unless defined $from;
4937         $to = $#{$commitlist} unless (defined $to && $to <= $#{$commitlist});
4938
4939         print "<table class=\"history\">\n";
4940         my $alternate = 1;
4941         for (my $i = $from; $i <= $to; $i++) {
4942                 my %co = %{$commitlist->[$i]};
4943                 if (!%co) {
4944                         next;
4945                 }
4946                 my $commit = $co{'id'};
4947
4948                 my $ref = format_ref_marker($refs, $commit);
4949
4950                 if ($alternate) {
4951                         print "<tr class=\"dark\">\n";
4952                 } else {
4953                         print "<tr class=\"light\">\n";
4954                 }
4955                 $alternate ^= 1;
4956                 print "<td title=\"$co{'age_string_age'}\"><i>$co{'age_string_date'}</i></td>\n" .
4957         # shortlog:   format_author_html('td', \%co, 10)
4958                       format_author_html('td', \%co, 15, 3) . "<td>";
4959                 # originally git_history used chop_str($co{'title'}, 50)
4960                 print format_subject_html($co{'title'}, $co{'title_short'},
4961                                           href(action=>"commit", hash=>$commit), $ref);
4962                 print "</td>\n" .
4963                       "<td class=\"link\">" .
4964                       $cgi->a({-href => href(action=>$ftype, hash_base=>$commit, file_name=>$file_name)}, $ftype) . " | " .
4965                       $cgi->a({-href => href(action=>"commitdiff", hash=>$commit)}, "commitdiff");
4966
4967                 if ($ftype eq 'blob') {
4968                         my $blob_current = $file_hash;
4969                         my $blob_parent  = git_get_hash_by_path($commit, $file_name);
4970                         if (defined $blob_current && defined $blob_parent &&
4971                                         $blob_current ne $blob_parent) {
4972                                 print " | " .
4973                                         $cgi->a({-href => href(action=>"blobdiff",
4974                                                                hash=>$blob_current, hash_parent=>$blob_parent,
4975                                                                hash_base=>$hash_base, hash_parent_base=>$commit,
4976                                                                file_name=>$file_name)},
4977                                                 "diff to current");
4978                         }
4979                 }
4980                 print "</td>\n" .
4981                       "</tr>\n";
4982         }
4983         if (defined $extra) {
4984                 print "<tr>\n" .
4985                       "<td colspan=\"4\">$extra</td>\n" .
4986                       "</tr>\n";
4987         }
4988         print "</table>\n";
4989 }
4990
4991 sub git_tags_body {
4992         # uses global variable $project
4993         my ($taglist, $from, $to, $extra) = @_;
4994         $from = 0 unless defined $from;
4995         $to = $#{$taglist} if (!defined $to || $#{$taglist} < $to);
4996
4997         print "<table class=\"tags\">\n";
4998         my $alternate = 1;
4999         for (my $i = $from; $i <= $to; $i++) {
5000                 my $entry = $taglist->[$i];
5001                 my %tag = %$entry;
5002                 my $comment = $tag{'subject'};
5003                 my $comment_short;
5004                 if (defined $comment) {
5005                         $comment_short = chop_str($comment, 30, 5);
5006                 }
5007                 if ($alternate) {
5008                         print "<tr class=\"dark\">\n";
5009                 } else {
5010                         print "<tr class=\"light\">\n";
5011                 }
5012                 $alternate ^= 1;
5013                 if (defined $tag{'age'}) {
5014                         print "<td><i>$tag{'age'}</i></td>\n";
5015                 } else {
5016                         print "<td></td>\n";
5017                 }
5018                 print "<td>" .
5019                       $cgi->a({-href => href(action=>$tag{'reftype'}, hash=>$tag{'refid'}),
5020                                -class => "list name"}, esc_html($tag{'name'})) .
5021                       "</td>\n" .
5022                       "<td>";
5023                 if (defined $comment) {
5024                         print format_subject_html($comment, $comment_short,
5025                                                   href(action=>"tag", hash=>$tag{'id'}));
5026                 }
5027                 print "</td>\n" .
5028                       "<td class=\"selflink\">";
5029                 if ($tag{'type'} eq "tag") {
5030                         print $cgi->a({-href => href(action=>"tag", hash=>$tag{'id'})}, "tag");
5031                 } else {
5032                         print "&nbsp;";
5033                 }
5034                 print "</td>\n" .
5035                       "<td class=\"link\">" . " | " .
5036                       $cgi->a({-href => href(action=>$tag{'reftype'}, hash=>$tag{'refid'})}, $tag{'reftype'});
5037                 if ($tag{'reftype'} eq "commit") {
5038                         print " | " . $cgi->a({-href => href(action=>"shortlog", hash=>$tag{'fullname'})}, "shortlog") .
5039                               " | " . $cgi->a({-href => href(action=>"log", hash=>$tag{'fullname'})}, "log");
5040                 } elsif ($tag{'reftype'} eq "blob") {
5041                         print " | " . $cgi->a({-href => href(action=>"blob_plain", hash=>$tag{'refid'})}, "raw");
5042                 }
5043                 print "</td>\n" .
5044                       "</tr>";
5045         }
5046         if (defined $extra) {
5047                 print "<tr>\n" .
5048                       "<td colspan=\"5\">$extra</td>\n" .
5049                       "</tr>\n";
5050         }
5051         print "</table>\n";
5052 }
5053
5054 sub git_heads_body {
5055         # uses global variable $project
5056         my ($headlist, $head, $from, $to, $extra) = @_;
5057         $from = 0 unless defined $from;
5058         $to = $#{$headlist} if (!defined $to || $#{$headlist} < $to);
5059
5060         print "<table class=\"heads\">\n";
5061         my $alternate = 1;
5062         for (my $i = $from; $i <= $to; $i++) {
5063                 my $entry = $headlist->[$i];
5064                 my %ref = %$entry;
5065                 my $curr = $ref{'id'} eq $head;
5066                 if ($alternate) {
5067                         print "<tr class=\"dark\">\n";
5068                 } else {
5069                         print "<tr class=\"light\">\n";
5070                 }
5071                 $alternate ^= 1;
5072                 print "<td><i>$ref{'age'}</i></td>\n" .
5073                       ($curr ? "<td class=\"current_head\">" : "<td>") .
5074                       $cgi->a({-href => href(action=>"shortlog", hash=>$ref{'fullname'}),
5075                                -class => "list name"},esc_html($ref{'name'})) .
5076                       "</td>\n" .
5077                       "<td class=\"link\">" .
5078                       $cgi->a({-href => href(action=>"shortlog", hash=>$ref{'fullname'})}, "shortlog") . " | " .
5079                       $cgi->a({-href => href(action=>"log", hash=>$ref{'fullname'})}, "log") . " | " .
5080                       $cgi->a({-href => href(action=>"tree", hash=>$ref{'fullname'}, hash_base=>$ref{'fullname'})}, "tree") .
5081                       "</td>\n" .
5082                       "</tr>";
5083         }
5084         if (defined $extra) {
5085                 print "<tr>\n" .
5086                       "<td colspan=\"3\">$extra</td>\n" .
5087                       "</tr>\n";
5088         }
5089         print "</table>\n";
5090 }
5091
5092 # Display a single remote block
5093 sub git_remote_block {
5094         my ($remote, $rdata, $limit, $head) = @_;
5095
5096         my $heads = $rdata->{'heads'};
5097         my $fetch = $rdata->{'fetch'};
5098         my $push = $rdata->{'push'};
5099
5100         my $urls_table = "<table class=\"projects_list\">\n" ;
5101
5102         if (defined $fetch) {
5103                 if ($fetch eq $push) {
5104                         $urls_table .= format_repo_url("URL", $fetch);
5105                 } else {
5106                         $urls_table .= format_repo_url("Fetch URL", $fetch);
5107                         $urls_table .= format_repo_url("Push URL", $push) if defined $push;
5108                 }
5109         } elsif (defined $push) {
5110                 $urls_table .= format_repo_url("Push URL", $push);
5111         } else {
5112                 $urls_table .= format_repo_url("", "No remote URL");
5113         }
5114
5115         $urls_table .= "</table>\n";
5116
5117         my $dots;
5118         if (defined $limit && $limit < @$heads) {
5119                 $dots = $cgi->a({-href => href(action=>"remotes", hash=>$remote)}, "...");
5120         }
5121
5122         print $urls_table;
5123         git_heads_body($heads, $head, 0, $limit, $dots);
5124 }
5125
5126 # Display a list of remote names with the respective fetch and push URLs
5127 sub git_remotes_list {
5128         my ($remotedata, $limit) = @_;
5129         print "<table class=\"heads\">\n";
5130         my $alternate = 1;
5131         my @remotes = sort keys %$remotedata;
5132
5133         my $limited = $limit && $limit < @remotes;
5134
5135         $#remotes = $limit - 1 if $limited;
5136
5137         while (my $remote = shift @remotes) {
5138                 my $rdata = $remotedata->{$remote};
5139                 my $fetch = $rdata->{'fetch'};
5140                 my $push = $rdata->{'push'};
5141                 if ($alternate) {
5142                         print "<tr class=\"dark\">\n";
5143                 } else {
5144                         print "<tr class=\"light\">\n";
5145                 }
5146                 $alternate ^= 1;
5147                 print "<td>" .
5148                       $cgi->a({-href=> href(action=>'remotes', hash=>$remote),
5149                                -class=> "list name"},esc_html($remote)) .
5150                       "</td>";
5151                 print "<td class=\"link\">" .
5152                       (defined $fetch ? $cgi->a({-href=> $fetch}, "fetch") : "fetch") .
5153                       " | " .
5154                       (defined $push ? $cgi->a({-href=> $push}, "push") : "push") .
5155                       "</td>";
5156
5157                 print "</tr>\n";
5158         }
5159
5160         if ($limited) {
5161                 print "<tr>\n" .
5162                       "<td colspan=\"3\">" .
5163                       $cgi->a({-href => href(action=>"remotes")}, "...") .
5164                       "</td>\n" . "</tr>\n";
5165         }
5166
5167         print "</table>";
5168 }
5169
5170 # Display remote heads grouped by remote, unless there are too many
5171 # remotes, in which case we only display the remote names
5172 sub git_remotes_body {
5173         my ($remotedata, $limit, $head) = @_;
5174         if ($limit and $limit < keys %$remotedata) {
5175                 git_remotes_list($remotedata, $limit);
5176         } else {
5177                 fill_remote_heads($remotedata);
5178                 while (my ($remote, $rdata) = each %$remotedata) {
5179                         git_print_section({-class=>"remote", -id=>$remote},
5180                                 ["remotes", $remote, $remote], sub {
5181                                         git_remote_block($remote, $rdata, $limit, $head);
5182                                 });
5183                 }
5184         }
5185 }
5186
5187 sub git_search_grep_body {
5188         my ($commitlist, $from, $to, $extra) = @_;
5189         $from = 0 unless defined $from;
5190         $to = $#{$commitlist} if (!defined $to || $#{$commitlist} < $to);
5191
5192         print "<table class=\"commit_search\">\n";
5193         my $alternate = 1;
5194         for (my $i = $from; $i <= $to; $i++) {
5195                 my %co = %{$commitlist->[$i]};
5196                 if (!%co) {
5197                         next;
5198                 }
5199                 my $commit = $co{'id'};
5200                 if ($alternate) {
5201                         print "<tr class=\"dark\">\n";
5202                 } else {
5203                         print "<tr class=\"light\">\n";
5204                 }
5205                 $alternate ^= 1;
5206                 print "<td title=\"$co{'age_string_age'}\"><i>$co{'age_string_date'}</i></td>\n" .
5207                       format_author_html('td', \%co, 15, 5) .
5208                       "<td>" .
5209                       $cgi->a({-href => href(action=>"commit", hash=>$co{'id'}),
5210                                -class => "list subject"},
5211                               chop_and_escape_str($co{'title'}, 50) . "<br/>");
5212                 my $comment = $co{'comment'};
5213                 foreach my $line (@$comment) {
5214                         if ($line =~ m/^(.*?)($search_regexp)(.*)$/i) {
5215                                 my ($lead, $match, $trail) = ($1, $2, $3);
5216                                 $match = chop_str($match, 70, 5, 'center');
5217                                 my $contextlen = int((80 - length($match))/2);
5218                                 $contextlen = 30 if ($contextlen > 30);
5219                                 $lead  = chop_str($lead,  $contextlen, 10, 'left');
5220                                 $trail = chop_str($trail, $contextlen, 10, 'right');
5221
5222                                 $lead  = esc_html($lead);
5223                                 $match = esc_html($match);
5224                                 $trail = esc_html($trail);
5225
5226                                 print "$lead<span class=\"match\">$match</span>$trail<br />";
5227                         }
5228                 }
5229                 print "</td>\n" .
5230                       "<td class=\"link\">" .
5231                       $cgi->a({-href => href(action=>"commit", hash=>$co{'id'})}, "commit") .
5232                       " | " .
5233                       $cgi->a({-href => href(action=>"commitdiff", hash=>$co{'id'})}, "commitdiff") .
5234                       " | " .
5235                       $cgi->a({-href => href(action=>"tree", hash=>$co{'tree'}, hash_base=>$co{'id'})}, "tree");
5236                 print "</td>\n" .
5237                       "</tr>\n";
5238         }
5239         if (defined $extra) {
5240                 print "<tr>\n" .
5241                       "<td colspan=\"3\">$extra</td>\n" .
5242                       "</tr>\n";
5243         }
5244         print "</table>\n";
5245 }
5246
5247 ## ======================================================================
5248 ## ======================================================================
5249 ## actions
5250
5251 sub git_project_list {
5252         my $order = $input_params{'order'};
5253         if (defined $order && $order !~ m/none|project|descr|owner|age/) {
5254                 die_error(400, "Unknown order parameter");
5255         }
5256
5257         my @list = git_get_projects_list();
5258         if (!@list) {
5259                 die_error(404, "No projects found");
5260         }
5261
5262         git_header_html();
5263         if (defined $home_text && -f $home_text) {
5264                 print "<div class=\"index_include\">\n";
5265                 insert_file($home_text);
5266                 print "</div>\n";
5267         }
5268         print $cgi->startform(-method => "get") .
5269               "<p class=\"projsearch\">Search:\n" .
5270               $cgi->textfield(-name => "s", -value => $searchtext) . "\n" .
5271               "</p>" .
5272               $cgi->end_form() . "\n";
5273         git_project_list_body(\@list, $order);
5274         git_footer_html();
5275 }
5276
5277 sub git_forks {
5278         my $order = $input_params{'order'};
5279         if (defined $order && $order !~ m/none|project|descr|owner|age/) {
5280                 die_error(400, "Unknown order parameter");
5281         }
5282
5283         my @list = git_get_projects_list($project);
5284         if (!@list) {
5285                 die_error(404, "No forks found");
5286         }
5287
5288         git_header_html();
5289         git_print_page_nav('','');
5290         git_print_header_div('summary', "$project forks");
5291         git_project_list_body(\@list, $order);
5292         git_footer_html();
5293 }
5294
5295 sub git_project_index {
5296         my @projects = git_get_projects_list($project);
5297
5298         print $cgi->header(
5299                 -type => 'text/plain',
5300                 -charset => 'utf-8',
5301                 -content_disposition => 'inline; filename="index.aux"');
5302
5303         foreach my $pr (@projects) {
5304                 if (!exists $pr->{'owner'}) {
5305                         $pr->{'owner'} = git_get_project_owner("$pr->{'path'}");
5306                 }
5307
5308                 my ($path, $owner) = ($pr->{'path'}, $pr->{'owner'});
5309                 # quote as in CGI::Util::encode, but keep the slash, and use '+' for ' '
5310                 $path  =~ s/([^a-zA-Z0-9_.\-\/ ])/sprintf("%%%02X", ord($1))/eg;
5311                 $owner =~ s/([^a-zA-Z0-9_.\-\/ ])/sprintf("%%%02X", ord($1))/eg;
5312                 $path  =~ s/ /\+/g;
5313                 $owner =~ s/ /\+/g;
5314
5315                 print "$path $owner\n";
5316         }
5317 }
5318
5319 sub git_summary {
5320         my $descr = git_get_project_description($project) || "none";
5321         my %co = parse_commit("HEAD");
5322         my %cd = %co ? parse_date($co{'committer_epoch'}, $co{'committer_tz'}) : ();
5323         my $head = $co{'id'};
5324         my $remote_heads = gitweb_check_feature('remote_heads');
5325
5326         my $owner = git_get_project_owner($project);
5327
5328         my $refs = git_get_references();
5329         # These get_*_list functions return one more to allow us to see if
5330         # there are more ...
5331         my @taglist  = git_get_tags_list(16);
5332         my @headlist = git_get_heads_list(16);
5333         my %remotedata = $remote_heads ? git_get_remotes_list() : ();
5334         my @forklist;
5335         my $check_forks = gitweb_check_feature('forks');
5336
5337         if ($check_forks) {
5338                 @forklist = git_get_projects_list($project);
5339         }
5340
5341         git_header_html();
5342         git_print_page_nav('summary','', $head);
5343
5344         print "<div class=\"title\">&nbsp;</div>\n";
5345         print "<table class=\"projects_list\">\n" .
5346               "<tr id=\"metadata_desc\"><td>description</td><td>" . esc_html($descr) . "</td></tr>\n" .
5347               "<tr id=\"metadata_owner\"><td>owner</td><td>" . esc_html($owner) . "</td></tr>\n";
5348         if (defined $cd{'rfc2822'}) {
5349                 print "<tr id=\"metadata_lchange\"><td>last change</td><td>$cd{'rfc2822'}</td></tr>\n";
5350         }
5351
5352         # use per project git URL list in $projectroot/$project/cloneurl
5353         # or make project git URL from git base URL and project name
5354         my $url_tag = "URL";
5355         my @url_list = git_get_project_url_list($project);
5356         @url_list = map { "$_/$project" } @git_base_url_list unless @url_list;
5357         foreach my $git_url (@url_list) {
5358                 next unless $git_url;
5359                 print format_repo_url($url_tag, $git_url);
5360                 $url_tag = "";
5361         }
5362
5363         # Tag cloud
5364         my $show_ctags = gitweb_check_feature('ctags');
5365         if ($show_ctags) {
5366                 my $ctags = git_get_project_ctags($project);
5367                 my $cloud = git_populate_project_tagcloud($ctags);
5368                 print "<tr id=\"metadata_ctags\"><td>Content tags:<br />";
5369                 print "</td>\n<td>" unless %$ctags;
5370                 print "<form action=\"$show_ctags\" method=\"post\"><input type=\"hidden\" name=\"p\" value=\"$project\" />Add: <input type=\"text\" name=\"t\" size=\"8\" /></form>";
5371                 print "</td>\n<td>" if %$ctags;
5372                 print git_show_project_tagcloud($cloud, 48);
5373                 print "</td></tr>";
5374         }
5375
5376         print "</table>\n";
5377
5378         # If XSS prevention is on, we don't include README.html.
5379         # TODO: Allow a readme in some safe format.
5380         if (!$prevent_xss && -s "$projectroot/$project/README.html") {
5381                 print "<div class=\"title\">readme</div>\n" .
5382                       "<div class=\"readme\">\n";
5383                 insert_file("$projectroot/$project/README.html");
5384                 print "\n</div>\n"; # class="readme"
5385         }
5386
5387         # we need to request one more than 16 (0..15) to check if
5388         # those 16 are all
5389         my @commitlist = $head ? parse_commits($head, 17) : ();
5390         if (@commitlist) {
5391                 git_print_header_div('shortlog');
5392                 git_shortlog_body(\@commitlist, 0, 15, $refs,
5393                                   $#commitlist <=  15 ? undef :
5394                                   $cgi->a({-href => href(action=>"shortlog")}, "..."));
5395         }
5396
5397         if (@taglist) {
5398                 git_print_header_div('tags');
5399                 git_tags_body(\@taglist, 0, 15,
5400                               $#taglist <=  15 ? undef :
5401                               $cgi->a({-href => href(action=>"tags")}, "..."));
5402         }
5403
5404         if (@headlist) {
5405                 git_print_header_div('heads');
5406                 git_heads_body(\@headlist, $head, 0, 15,
5407                                $#headlist <= 15 ? undef :
5408                                $cgi->a({-href => href(action=>"heads")}, "..."));
5409         }
5410
5411         if (%remotedata) {
5412                 git_print_header_div('remotes');
5413                 git_remotes_body(\%remotedata, 15, $head);
5414         }
5415
5416         if (@forklist) {
5417                 git_print_header_div('forks');
5418                 git_project_list_body(\@forklist, 'age', 0, 15,
5419                                       $#forklist <= 15 ? undef :
5420                                       $cgi->a({-href => href(action=>"forks")}, "..."),
5421                                       'no_header');
5422         }
5423
5424         git_footer_html();
5425 }
5426
5427 sub git_tag {
5428         my %tag = parse_tag($hash);
5429
5430         if (! %tag) {
5431                 die_error(404, "Unknown tag object");
5432         }
5433
5434         my $head = git_get_head_hash($project);
5435         git_header_html();
5436         git_print_page_nav('','', $head,undef,$head);
5437         git_print_header_div('commit', esc_html($tag{'name'}), $hash);
5438         print "<div class=\"title_text\">\n" .
5439               "<table class=\"object_header\">\n" .
5440               "<tr>\n" .
5441               "<td>object</td>\n" .
5442               "<td>" . $cgi->a({-class => "list", -href => href(action=>$tag{'type'}, hash=>$tag{'object'})},
5443                                $tag{'object'}) . "</td>\n" .
5444               "<td class=\"link\">" . $cgi->a({-href => href(action=>$tag{'type'}, hash=>$tag{'object'})},
5445                                               $tag{'type'}) . "</td>\n" .
5446               "</tr>\n";
5447         if (defined($tag{'author'})) {
5448                 git_print_authorship_rows(\%tag, 'author');
5449         }
5450         print "</table>\n\n" .
5451               "</div>\n";
5452         print "<div class=\"page_body\">";
5453         my $comment = $tag{'comment'};
5454         foreach my $line (@$comment) {
5455                 chomp $line;
5456                 print esc_html($line, -nbsp=>1) . "<br/>\n";
5457         }
5458         print "</div>\n";
5459         git_footer_html();
5460 }
5461
5462 sub git_blame_common {
5463         my $format = shift || 'porcelain';
5464         if ($format eq 'porcelain' && $cgi->param('js')) {
5465                 $format = 'incremental';
5466                 $action = 'blame_incremental'; # for page title etc
5467         }
5468
5469         # permissions
5470         gitweb_check_feature('blame')
5471                 or die_error(403, "Blame view not allowed");
5472
5473         # error checking
5474         die_error(400, "No file name given") unless $file_name;
5475         $hash_base ||= git_get_head_hash($project);
5476         die_error(404, "Couldn't find base commit") unless $hash_base;
5477         my %co = parse_commit($hash_base)
5478                 or die_error(404, "Commit not found");
5479         my $ftype = "blob";
5480         if (!defined $hash) {
5481                 $hash = git_get_hash_by_path($hash_base, $file_name, "blob")
5482                         or die_error(404, "Error looking up file");
5483         } else {
5484                 $ftype = git_get_type($hash);
5485                 if ($ftype !~ "blob") {
5486                         die_error(400, "Object is not a blob");
5487                 }
5488         }
5489
5490         my $fd;
5491         if ($format eq 'incremental') {
5492                 # get file contents (as base)
5493                 open $fd, "-|", git_cmd(), 'cat-file', 'blob', $hash
5494                         or die_error(500, "Open git-cat-file failed");
5495         } elsif ($format eq 'data') {
5496                 # run git-blame --incremental
5497                 open $fd, "-|", git_cmd(), "blame", "--incremental",
5498                         $hash_base, "--", $file_name
5499                         or die_error(500, "Open git-blame --incremental failed");
5500         } else {
5501                 # run git-blame --porcelain
5502                 open $fd, "-|", git_cmd(), "blame", '-p',
5503                         $hash_base, '--', $file_name
5504                         or die_error(500, "Open git-blame --porcelain failed");
5505         }
5506
5507         # incremental blame data returns early
5508         if ($format eq 'data') {
5509                 print $cgi->header(
5510                         -type=>"text/plain", -charset => "utf-8",
5511                         -status=> "200 OK");
5512                 local $| = 1; # output autoflush
5513                 print while <$fd>;
5514                 close $fd
5515                         or print "ERROR $!\n";
5516
5517                 print 'END';
5518                 if (defined $t0 && gitweb_check_feature('timed')) {
5519                         print ' '.
5520                               Time::HiRes::tv_interval($t0, [Time::HiRes::gettimeofday()]).
5521                               ' '.$number_of_git_cmds;
5522                 }
5523                 print "\n";
5524
5525                 return;
5526         }
5527
5528         # page header
5529         git_header_html();
5530         my $formats_nav =
5531                 $cgi->a({-href => href(action=>"blob", -replay=>1)},
5532                         "blob") .
5533                 " | ";
5534         if ($format eq 'incremental') {
5535                 $formats_nav .=
5536                         $cgi->a({-href => href(action=>"blame", javascript=>0, -replay=>1)},
5537                                 "blame") . " (non-incremental)";
5538         } else {
5539                 $formats_nav .=
5540                         $cgi->a({-href => href(action=>"blame_incremental", -replay=>1)},
5541                                 "blame") . " (incremental)";
5542         }
5543         $formats_nav .=
5544                 " | " .
5545                 $cgi->a({-href => href(action=>"history", -replay=>1)},
5546                         "history") .
5547                 " | " .
5548                 $cgi->a({-href => href(action=>$action, file_name=>$file_name)},
5549                         "HEAD");
5550         git_print_page_nav('','', $hash_base,$co{'tree'},$hash_base, $formats_nav);
5551         git_print_header_div('commit', esc_html($co{'title'}), $hash_base);
5552         git_print_page_path($file_name, $ftype, $hash_base);
5553
5554         # page body
5555         if ($format eq 'incremental') {
5556                 print "<noscript>\n<div class=\"error\"><center><b>\n".
5557                       "This page requires JavaScript to run.\n Use ".
5558                       $cgi->a({-href => href(action=>'blame',javascript=>0,-replay=>1)},
5559                               'this page').
5560                       " instead.\n".
5561                       "</b></center></div>\n</noscript>\n";
5562
5563                 print qq!<div id="progress_bar" style="width: 100%; background-color: yellow"></div>\n!;
5564         }
5565
5566         print qq!<div class="page_body">\n!;
5567         print qq!<div id="progress_info">... / ...</div>\n!
5568                 if ($format eq 'incremental');
5569         print qq!<table id="blame_table" class="blame" width="100%">\n!.
5570               #qq!<col width="5.5em" /><col width="2.5em" /><col width="*" />\n!.
5571               qq!<thead>\n!.
5572               qq!<tr><th>Commit</th><th>Line</th><th>Data</th></tr>\n!.
5573               qq!</thead>\n!.
5574               qq!<tbody>\n!;
5575
5576         my @rev_color = qw(light dark);
5577         my $num_colors = scalar(@rev_color);
5578         my $current_color = 0;
5579
5580         if ($format eq 'incremental') {
5581                 my $color_class = $rev_color[$current_color];
5582
5583                 #contents of a file
5584                 my $linenr = 0;
5585         LINE:
5586                 while (my $line = <$fd>) {
5587                         chomp $line;
5588                         $linenr++;
5589
5590                         print qq!<tr id="l$linenr" class="$color_class">!.
5591                               qq!<td class="sha1"><a href=""> </a></td>!.
5592                               qq!<td class="linenr">!.
5593                               qq!<a class="linenr" href="">$linenr</a></td>!;
5594                         print qq!<td class="pre">! . esc_html($line) . "</td>\n";
5595                         print qq!</tr>\n!;
5596                 }
5597
5598         } else { # porcelain, i.e. ordinary blame
5599                 my %metainfo = (); # saves information about commits
5600
5601                 # blame data
5602         LINE:
5603                 while (my $line = <$fd>) {
5604                         chomp $line;
5605                         # the header: <SHA-1> <src lineno> <dst lineno> [<lines in group>]
5606                         # no <lines in group> for subsequent lines in group of lines
5607                         my ($full_rev, $orig_lineno, $lineno, $group_size) =
5608                            ($line =~ /^([0-9a-f]{40}) (\d+) (\d+)(?: (\d+))?$/);
5609                         if (!exists $metainfo{$full_rev}) {
5610                                 $metainfo{$full_rev} = { 'nprevious' => 0 };
5611                         }
5612                         my $meta = $metainfo{$full_rev};
5613                         my $data;
5614                         while ($data = <$fd>) {
5615                                 chomp $data;
5616                                 last if ($data =~ s/^\t//); # contents of line
5617                                 if ($data =~ /^(\S+)(?: (.*))?$/) {
5618                                         $meta->{$1} = $2 unless exists $meta->{$1};
5619                                 }
5620                                 if ($data =~ /^previous /) {
5621                                         $meta->{'nprevious'}++;
5622                                 }
5623                         }
5624                         my $short_rev = substr($full_rev, 0, 8);
5625                         my $author = $meta->{'author'};
5626                         my %date =
5627                                 parse_date($meta->{'author-time'}, $meta->{'author-tz'});
5628                         my $date = $date{'iso-tz'};
5629                         if ($group_size) {
5630                                 $current_color = ($current_color + 1) % $num_colors;
5631                         }
5632                         my $tr_class = $rev_color[$current_color];
5633                         $tr_class .= ' boundary' if (exists $meta->{'boundary'});
5634                         $tr_class .= ' no-previous' if ($meta->{'nprevious'} == 0);
5635                         $tr_class .= ' multiple-previous' if ($meta->{'nprevious'} > 1);
5636                         print "<tr id=\"l$lineno\" class=\"$tr_class\">\n";
5637                         if ($group_size) {
5638                                 print "<td class=\"sha1\"";
5639                                 print " title=\"". esc_html($author) . ", $date\"";
5640                                 print " rowspan=\"$group_size\"" if ($group_size > 1);
5641                                 print ">";
5642                                 print $cgi->a({-href => href(action=>"commit",
5643                                                              hash=>$full_rev,
5644                                                              file_name=>$file_name)},
5645                                               esc_html($short_rev));
5646                                 if ($group_size >= 2) {
5647                                         my @author_initials = ($author =~ /\b([[:upper:]])\B/g);
5648                                         if (@author_initials) {
5649                                                 print "<br />" .
5650                                                       esc_html(join('', @author_initials));
5651                                                 #           or join('.', ...)
5652                                         }
5653                                 }
5654                                 print "</td>\n";
5655                         }
5656                         # 'previous' <sha1 of parent commit> <filename at commit>
5657                         if (exists $meta->{'previous'} &&
5658                             $meta->{'previous'} =~ /^([a-fA-F0-9]{40}) (.*)$/) {
5659                                 $meta->{'parent'} = $1;
5660                                 $meta->{'file_parent'} = unquote($2);
5661                         }
5662                         my $linenr_commit =
5663                                 exists($meta->{'parent'}) ?
5664                                 $meta->{'parent'} : $full_rev;
5665                         my $linenr_filename =
5666                                 exists($meta->{'file_parent'}) ?
5667                                 $meta->{'file_parent'} : unquote($meta->{'filename'});
5668                         my $blamed = href(action => 'blame',
5669                                           file_name => $linenr_filename,
5670                                           hash_base => $linenr_commit);
5671                         print "<td class=\"linenr\">";
5672                         print $cgi->a({ -href => "$blamed#l$orig_lineno",
5673                                         -class => "linenr" },
5674                                       esc_html($lineno));
5675                         print "</td>";
5676                         print "<td class=\"pre\">" . esc_html($data) . "</td>\n";
5677                         print "</tr>\n";
5678                 } # end while
5679
5680         }
5681
5682         # footer
5683         print "</tbody>\n".
5684               "</table>\n"; # class="blame"
5685         print "</div>\n";   # class="blame_body"
5686         close $fd
5687                 or print "Reading blob failed\n";
5688
5689         git_footer_html();
5690 }
5691
5692 sub git_blame {
5693         git_blame_common();
5694 }
5695
5696 sub git_blame_incremental {
5697         git_blame_common('incremental');
5698 }
5699
5700 sub git_blame_data {
5701         git_blame_common('data');
5702 }
5703
5704 sub git_tags {
5705         my $head = git_get_head_hash($project);
5706         git_header_html();
5707         git_print_page_nav('','', $head,undef,$head,format_ref_views('tags'));
5708         git_print_header_div('summary', $project);
5709
5710         my @tagslist = git_get_tags_list();
5711         if (@tagslist) {
5712                 git_tags_body(\@tagslist);
5713         }
5714         git_footer_html();
5715 }
5716
5717 sub git_heads {
5718         my $head = git_get_head_hash($project);
5719         git_header_html();
5720         git_print_page_nav('','', $head,undef,$head,format_ref_views('heads'));
5721         git_print_header_div('summary', $project);
5722
5723         my @headslist = git_get_heads_list();
5724         if (@headslist) {
5725                 git_heads_body(\@headslist, $head);
5726         }
5727         git_footer_html();
5728 }
5729
5730 # used both for single remote view and for list of all the remotes
5731 sub git_remotes {
5732         gitweb_check_feature('remote_heads')
5733                 or die_error(403, "Remote heads view is disabled");
5734
5735         my $head = git_get_head_hash($project);
5736         my $remote = $input_params{'hash'};
5737
5738         my $remotedata = git_get_remotes_list($remote);
5739         die_error(500, "Unable to get remote information") unless defined $remotedata;
5740
5741         unless (%$remotedata) {
5742                 die_error(404, defined $remote ?
5743                         "Remote $remote not found" :
5744                         "No remotes found");
5745         }
5746
5747         git_header_html(undef, undef, -action_extra => $remote);
5748         git_print_page_nav('', '',  $head, undef, $head,
5749                 format_ref_views($remote ? '' : 'remotes'));
5750
5751         fill_remote_heads($remotedata);
5752         if (defined $remote) {
5753                 git_print_header_div('remotes', "$remote remote for $project");
5754                 git_remote_block($remote, $remotedata->{$remote}, undef, $head);
5755         } else {
5756                 git_print_header_div('summary', "$project remotes");
5757                 git_remotes_body($remotedata, undef, $head);
5758         }
5759
5760         git_footer_html();
5761 }
5762
5763 sub git_blob_plain {
5764         my $type = shift;
5765         my $expires;
5766
5767         if (!defined $hash) {
5768                 if (defined $file_name) {
5769                         my $base = $hash_base || git_get_head_hash($project);
5770                         $hash = git_get_hash_by_path($base, $file_name, "blob")
5771                                 or die_error(404, "Cannot find file");
5772                 } else {
5773                         die_error(400, "No file name defined");
5774                 }
5775         } elsif ($hash =~ m/^[0-9a-fA-F]{40}$/) {
5776                 # blobs defined by non-textual hash id's can be cached
5777                 $expires = "+1d";
5778         }
5779
5780         open my $fd, "-|", git_cmd(), "cat-file", "blob", $hash
5781                 or die_error(500, "Open git-cat-file blob '$hash' failed");
5782
5783         # content-type (can include charset)
5784         $type = blob_contenttype($fd, $file_name, $type);
5785
5786         # "save as" filename, even when no $file_name is given
5787         my $save_as = "$hash";
5788         if (defined $file_name) {
5789                 $save_as = $file_name;
5790         } elsif ($type =~ m/^text\//) {
5791                 $save_as .= '.txt';
5792         }
5793
5794         # With XSS prevention on, blobs of all types except a few known safe
5795         # ones are served with "Content-Disposition: attachment" to make sure
5796         # they don't run in our security domain.  For certain image types,
5797         # blob view writes an <img> tag referring to blob_plain view, and we
5798         # want to be sure not to break that by serving the image as an
5799         # attachment (though Firefox 3 doesn't seem to care).
5800         my $sandbox = $prevent_xss &&
5801                 $type !~ m!^(?:text/plain|image/(?:gif|png|jpeg))$!;
5802
5803         print $cgi->header(
5804                 -type => $type,
5805                 -expires => $expires,
5806                 -content_disposition =>
5807                         ($sandbox ? 'attachment' : 'inline')
5808                         . '; filename="' . $save_as . '"');
5809         local $/ = undef;
5810         binmode STDOUT, ':raw';
5811         print <$fd>;
5812         binmode STDOUT, ':utf8'; # as set at the beginning of gitweb.cgi
5813         close $fd;
5814 }
5815
5816 sub git_blob {
5817         my $expires;
5818
5819         if (!defined $hash) {
5820                 if (defined $file_name) {
5821                         my $base = $hash_base || git_get_head_hash($project);
5822                         $hash = git_get_hash_by_path($base, $file_name, "blob")
5823                                 or die_error(404, "Cannot find file");
5824                 } else {
5825                         die_error(400, "No file name defined");
5826                 }
5827         } elsif ($hash =~ m/^[0-9a-fA-F]{40}$/) {
5828                 # blobs defined by non-textual hash id's can be cached
5829                 $expires = "+1d";
5830         }
5831
5832         my $have_blame = gitweb_check_feature('blame');
5833         open my $fd, "-|", git_cmd(), "cat-file", "blob", $hash
5834                 or die_error(500, "Couldn't cat $file_name, $hash");
5835         my $mimetype = blob_mimetype($fd, $file_name);
5836         # use 'blob_plain' (aka 'raw') view for files that cannot be displayed
5837         if ($mimetype !~ m!^(?:text/|image/(?:gif|png|jpeg)$)! && -B $fd) {
5838                 close $fd;
5839                 return git_blob_plain($mimetype);
5840         }
5841         # we can have blame only for text/* mimetype
5842         $have_blame &&= ($mimetype =~ m!^text/!);
5843
5844         my $highlight = gitweb_check_feature('highlight');
5845         my $syntax = guess_file_syntax($highlight, $mimetype, $file_name);
5846         $fd = run_highlighter($fd, $highlight, $syntax)
5847                 if $syntax;
5848
5849         git_header_html(undef, $expires);
5850         my $formats_nav = '';
5851         if (defined $hash_base && (my %co = parse_commit($hash_base))) {
5852                 if (defined $file_name) {
5853                         if ($have_blame) {
5854                                 $formats_nav .=
5855                                         $cgi->a({-href => href(action=>"blame", -replay=>1)},
5856                                                 "blame") .
5857                                         " | ";
5858                         }
5859                         $formats_nav .=
5860                                 $cgi->a({-href => href(action=>"history", -replay=>1)},
5861                                         "history") .
5862                                 " | " .
5863                                 $cgi->a({-href => href(action=>"blob_plain", -replay=>1)},
5864                                         "raw") .
5865                                 " | " .
5866                                 $cgi->a({-href => href(action=>"blob",
5867                                                        hash_base=>"HEAD", file_name=>$file_name)},
5868                                         "HEAD");
5869                 } else {
5870                         $formats_nav .=
5871                                 $cgi->a({-href => href(action=>"blob_plain", -replay=>1)},
5872                                         "raw");
5873                 }
5874                 git_print_page_nav('','', $hash_base,$co{'tree'},$hash_base, $formats_nav);
5875                 git_print_header_div('commit', esc_html($co{'title'}), $hash_base);
5876         } else {
5877                 print "<div class=\"page_nav\">\n" .
5878                       "<br/><br/></div>\n" .
5879                       "<div class=\"title\">$hash</div>\n";
5880         }
5881         git_print_page_path($file_name, "blob", $hash_base);
5882         print "<div class=\"page_body\">\n";
5883         if ($mimetype =~ m!^image/!) {
5884                 print qq!<img type="$mimetype"!;
5885                 if ($file_name) {
5886                         print qq! alt="$file_name" title="$file_name"!;
5887                 }
5888                 print qq! src="! .
5889                       href(action=>"blob_plain", hash=>$hash,
5890                            hash_base=>$hash_base, file_name=>$file_name) .
5891                       qq!" />\n!;
5892         } else {
5893                 my $nr;
5894                 while (my $line = <$fd>) {
5895                         chomp $line;
5896                         $nr++;
5897                         $line = untabify($line);
5898                         printf qq!<div class="pre"><a id="l%i" href="%s#l%i" class="linenr">%4i</a> %s</div>\n!,
5899                                $nr, href(-replay => 1), $nr, $nr, $syntax ? $line : esc_html($line, -nbsp=>1);
5900                 }
5901         }
5902         close $fd
5903                 or print "Reading blob failed.\n";
5904         print "</div>";
5905         git_footer_html();
5906 }
5907
5908 sub git_tree {
5909         if (!defined $hash_base) {
5910                 $hash_base = "HEAD";
5911         }
5912         if (!defined $hash) {
5913                 if (defined $file_name) {
5914                         $hash = git_get_hash_by_path($hash_base, $file_name, "tree");
5915                 } else {
5916                         $hash = $hash_base;
5917                 }
5918         }
5919         die_error(404, "No such tree") unless defined($hash);
5920
5921         my $show_sizes = gitweb_check_feature('show-sizes');
5922         my $have_blame = gitweb_check_feature('blame');
5923
5924         my @entries = ();
5925         {
5926                 local $/ = "\0";
5927                 open my $fd, "-|", git_cmd(), "ls-tree", '-z',
5928                         ($show_sizes ? '-l' : ()), @extra_options, $hash
5929                         or die_error(500, "Open git-ls-tree failed");
5930                 @entries = map { chomp; $_ } <$fd>;
5931                 close $fd
5932                         or die_error(404, "Reading tree failed");
5933         }
5934
5935         my $refs = git_get_references();
5936         my $ref = format_ref_marker($refs, $hash_base);
5937         git_header_html();
5938         my $basedir = '';
5939         if (defined $hash_base && (my %co = parse_commit($hash_base))) {
5940                 my @views_nav = ();
5941                 if (defined $file_name) {
5942                         push @views_nav,
5943                                 $cgi->a({-href => href(action=>"history", -replay=>1)},
5944                                         "history"),
5945                                 $cgi->a({-href => href(action=>"tree",
5946                                                        hash_base=>"HEAD", file_name=>$file_name)},
5947                                         "HEAD"),
5948                 }
5949                 my $snapshot_links = format_snapshot_links($hash);
5950                 if (defined $snapshot_links) {
5951                         # FIXME: Should be available when we have no hash base as well.
5952                         push @views_nav, $snapshot_links;
5953                 }
5954                 git_print_page_nav('tree','', $hash_base, undef, undef,
5955                                    join(' | ', @views_nav));
5956                 git_print_header_div('commit', esc_html($co{'title'}) . $ref, $hash_base);
5957         } else {
5958                 undef $hash_base;
5959                 print "<div class=\"page_nav\">\n";
5960                 print "<br/><br/></div>\n";
5961                 print "<div class=\"title\">$hash</div>\n";
5962         }
5963         if (defined $file_name) {
5964                 $basedir = $file_name;
5965                 if ($basedir ne '' && substr($basedir, -1) ne '/') {
5966                         $basedir .= '/';
5967                 }
5968                 git_print_page_path($file_name, 'tree', $hash_base);
5969         }
5970         print "<div class=\"page_body\">\n";
5971         print "<table class=\"tree\">\n";
5972         my $alternate = 1;
5973         # '..' (top directory) link if possible
5974         if (defined $hash_base &&
5975             defined $file_name && $file_name =~ m![^/]+$!) {
5976                 if ($alternate) {
5977                         print "<tr class=\"dark\">\n";
5978                 } else {
5979                         print "<tr class=\"light\">\n";
5980                 }
5981                 $alternate ^= 1;
5982
5983                 my $up = $file_name;
5984                 $up =~ s!/?[^/]+$!!;
5985                 undef $up unless $up;
5986                 # based on git_print_tree_entry
5987                 print '<td class="mode">' . mode_str('040000') . "</td>\n";
5988                 print '<td class="size">&nbsp;</td>'."\n" if $show_sizes;
5989                 print '<td class="list">';
5990                 print $cgi->a({-href => href(action=>"tree",
5991                                              hash_base=>$hash_base,
5992                                              file_name=>$up)},
5993                               "..");
5994                 print "</td>\n";
5995                 print "<td class=\"link\"></td>\n";
5996
5997                 print "</tr>\n";
5998         }
5999         foreach my $line (@entries) {
6000                 my %t = parse_ls_tree_line($line, -z => 1, -l => $show_sizes);
6001
6002                 if ($alternate) {
6003                         print "<tr class=\"dark\">\n";
6004                 } else {
6005                         print "<tr class=\"light\">\n";
6006                 }
6007                 $alternate ^= 1;
6008
6009                 git_print_tree_entry(\%t, $basedir, $hash_base, $have_blame);
6010
6011                 print "</tr>\n";
6012         }
6013         print "</table>\n" .
6014               "</div>";
6015         git_footer_html();
6016 }
6017
6018 sub snapshot_name {
6019         my ($project, $hash) = @_;
6020
6021         # path/to/project.git  -> project
6022         # path/to/project/.git -> project
6023         my $name = to_utf8($project);
6024         $name =~ s,([^/])/*\.git$,$1,;
6025         $name = basename($name);
6026         # sanitize name
6027         $name =~ s/[[:cntrl:]]/?/g;
6028
6029         my $ver = $hash;
6030         if ($hash =~ /^[0-9a-fA-F]+$/) {
6031                 # shorten SHA-1 hash
6032                 my $full_hash = git_get_full_hash($project, $hash);
6033                 if ($full_hash =~ /^$hash/ && length($hash) > 7) {
6034                         $ver = git_get_short_hash($project, $hash);
6035                 }
6036         } elsif ($hash =~ m!^refs/tags/(.*)$!) {
6037                 # tags don't need shortened SHA-1 hash
6038                 $ver = $1;
6039         } else {
6040                 # branches and other need shortened SHA-1 hash
6041                 if ($hash =~ m!^refs/(?:heads|remotes)/(.*)$!) {
6042                         $ver = $1;
6043                 }
6044                 $ver .= '-' . git_get_short_hash($project, $hash);
6045         }
6046         # in case of hierarchical branch names
6047         $ver =~ s!/!.!g;
6048
6049         # name = project-version_string
6050         $name = "$name-$ver";
6051
6052         return wantarray ? ($name, $name) : $name;
6053 }
6054
6055 sub git_snapshot {
6056         my $format = $input_params{'snapshot_format'};
6057         if (!@snapshot_fmts) {
6058                 die_error(403, "Snapshots not allowed");
6059         }
6060         # default to first supported snapshot format
6061         $format ||= $snapshot_fmts[0];
6062         if ($format !~ m/^[a-z0-9]+$/) {
6063                 die_error(400, "Invalid snapshot format parameter");
6064         } elsif (!exists($known_snapshot_formats{$format})) {
6065                 die_error(400, "Unknown snapshot format");
6066         } elsif ($known_snapshot_formats{$format}{'disabled'}) {
6067                 die_error(403, "Snapshot format not allowed");
6068         } elsif (!grep($_ eq $format, @snapshot_fmts)) {
6069                 die_error(403, "Unsupported snapshot format");
6070         }
6071
6072         my $type = git_get_type("$hash^{}");
6073         if (!$type) {
6074                 die_error(404, 'Object does not exist');
6075         }  elsif ($type eq 'blob') {
6076                 die_error(400, 'Object is not a tree-ish');
6077         }
6078
6079         my ($name, $prefix) = snapshot_name($project, $hash);
6080         my $filename = "$name$known_snapshot_formats{$format}{'suffix'}";
6081         my $cmd = quote_command(
6082                 git_cmd(), 'archive',
6083                 "--format=$known_snapshot_formats{$format}{'format'}",
6084                 "--prefix=$prefix/", $hash);
6085         if (exists $known_snapshot_formats{$format}{'compressor'}) {
6086                 $cmd .= ' | ' . quote_command(@{$known_snapshot_formats{$format}{'compressor'}});
6087         }
6088
6089         $filename =~ s/(["\\])/\\$1/g;
6090         print $cgi->header(
6091                 -type => $known_snapshot_formats{$format}{'type'},
6092                 -content_disposition => 'inline; filename="' . $filename . '"',
6093                 -status => '200 OK');
6094
6095         open my $fd, "-|", $cmd
6096                 or die_error(500, "Execute git-archive failed");
6097         binmode STDOUT, ':raw';
6098         print <$fd>;
6099         binmode STDOUT, ':utf8'; # as set at the beginning of gitweb.cgi
6100         close $fd;
6101 }
6102
6103 sub git_log_generic {
6104         my ($fmt_name, $body_subr, $base, $parent, $file_name, $file_hash) = @_;
6105
6106         my $head = git_get_head_hash($project);
6107         if (!defined $base) {
6108                 $base = $head;
6109         }
6110         if (!defined $page) {
6111                 $page = 0;
6112         }
6113         my $refs = git_get_references();
6114
6115         my $commit_hash = $base;
6116         if (defined $parent) {
6117                 $commit_hash = "$parent..$base";
6118         }
6119         my @commitlist =
6120                 parse_commits($commit_hash, 101, (100 * $page),
6121                               defined $file_name ? ($file_name, "--full-history") : ());
6122
6123         my $ftype;
6124         if (!defined $file_hash && defined $file_name) {
6125                 # some commits could have deleted file in question,
6126                 # and not have it in tree, but one of them has to have it
6127                 for (my $i = 0; $i < @commitlist; $i++) {
6128                         $file_hash = git_get_hash_by_path($commitlist[$i]{'id'}, $file_name);
6129                         last if defined $file_hash;
6130                 }
6131         }
6132         if (defined $file_hash) {
6133                 $ftype = git_get_type($file_hash);
6134         }
6135         if (defined $file_name && !defined $ftype) {
6136                 die_error(500, "Unknown type of object");
6137         }
6138         my %co;
6139         if (defined $file_name) {
6140                 %co = parse_commit($base)
6141                         or die_error(404, "Unknown commit object");
6142         }
6143
6144
6145         my $paging_nav = format_paging_nav($fmt_name, $page, $#commitlist >= 100);
6146         my $next_link = '';
6147         if ($#commitlist >= 100) {
6148                 $next_link =
6149                         $cgi->a({-href => href(-replay=>1, page=>$page+1),
6150                                  -accesskey => "n", -title => "Alt-n"}, "next");
6151         }
6152         my $patch_max = gitweb_get_feature('patches');
6153         if ($patch_max && !defined $file_name) {
6154                 if ($patch_max < 0 || @commitlist <= $patch_max) {
6155                         $paging_nav .= " &sdot; " .
6156                                 $cgi->a({-href => href(action=>"patches", -replay=>1)},
6157                                         "patches");
6158                 }
6159         }
6160
6161         git_header_html();
6162         git_print_page_nav($fmt_name,'', $hash,$hash,$hash, $paging_nav);
6163         if (defined $file_name) {
6164                 git_print_header_div('commit', esc_html($co{'title'}), $base);
6165         } else {
6166                 git_print_header_div('summary', $project)
6167         }
6168         git_print_page_path($file_name, $ftype, $hash_base)
6169                 if (defined $file_name);
6170
6171         $body_subr->(\@commitlist, 0, 99, $refs, $next_link,
6172                      $file_name, $file_hash, $ftype);
6173
6174         git_footer_html();
6175 }
6176
6177 sub git_log {
6178         git_log_generic('log', \&git_log_body,
6179                         $hash, $hash_parent);
6180 }
6181
6182 sub git_commit {
6183         $hash ||= $hash_base || "HEAD";
6184         my %co = parse_commit($hash)
6185             or die_error(404, "Unknown commit object");
6186
6187         my $parent  = $co{'parent'};
6188         my $parents = $co{'parents'}; # listref
6189
6190         # we need to prepare $formats_nav before any parameter munging
6191         my $formats_nav;
6192         if (!defined $parent) {
6193                 # --root commitdiff
6194                 $formats_nav .= '(initial)';
6195         } elsif (@$parents == 1) {
6196                 # single parent commit
6197                 $formats_nav .=
6198                         '(parent: ' .
6199                         $cgi->a({-href => href(action=>"commit",
6200                                                hash=>$parent)},
6201                                 esc_html(substr($parent, 0, 7))) .
6202                         ')';
6203         } else {
6204                 # merge commit
6205                 $formats_nav .=
6206                         '(merge: ' .
6207                         join(' ', map {
6208                                 $cgi->a({-href => href(action=>"commit",
6209                                                        hash=>$_)},
6210                                         esc_html(substr($_, 0, 7)));
6211                         } @$parents ) .
6212                         ')';
6213         }
6214         if (gitweb_check_feature('patches') && @$parents <= 1) {
6215                 $formats_nav .= " | " .
6216                         $cgi->a({-href => href(action=>"patch", -replay=>1)},
6217                                 "patch");
6218         }
6219
6220         if (!defined $parent) {
6221                 $parent = "--root";
6222         }
6223         my @difftree;
6224         open my $fd, "-|", git_cmd(), "diff-tree", '-r', "--no-commit-id",
6225                 @diff_opts,
6226                 (@$parents <= 1 ? $parent : '-c'),
6227                 $hash, "--"
6228                 or die_error(500, "Open git-diff-tree failed");
6229         @difftree = map { chomp; $_ } <$fd>;
6230         close $fd or die_error(404, "Reading git-diff-tree failed");
6231
6232         # non-textual hash id's can be cached
6233         my $expires;
6234         if ($hash =~ m/^[0-9a-fA-F]{40}$/) {
6235                 $expires = "+1d";
6236         }
6237         my $refs = git_get_references();
6238         my $ref = format_ref_marker($refs, $co{'id'});
6239
6240         git_header_html(undef, $expires);
6241         git_print_page_nav('commit', '',
6242                            $hash, $co{'tree'}, $hash,
6243                            $formats_nav);
6244
6245         if (defined $co{'parent'}) {
6246                 git_print_header_div('commitdiff', esc_html($co{'title'}) . $ref, $hash);
6247         } else {
6248                 git_print_header_div('tree', esc_html($co{'title'}) . $ref, $co{'tree'}, $hash);
6249         }
6250         print "<div class=\"title_text\">\n" .
6251               "<table class=\"object_header\">\n";
6252         git_print_authorship_rows(\%co);
6253         print "<tr><td>commit</td><td class=\"sha1\">$co{'id'}</td></tr>\n";
6254         print "<tr>" .
6255               "<td>tree</td>" .
6256               "<td class=\"sha1\">" .
6257               $cgi->a({-href => href(action=>"tree", hash=>$co{'tree'}, hash_base=>$hash),
6258                        class => "list"}, $co{'tree'}) .
6259               "</td>" .
6260               "<td class=\"link\">" .
6261               $cgi->a({-href => href(action=>"tree", hash=>$co{'tree'}, hash_base=>$hash)},
6262                       "tree");
6263         my $snapshot_links = format_snapshot_links($hash);
6264         if (defined $snapshot_links) {
6265                 print " | " . $snapshot_links;
6266         }
6267         print "</td>" .
6268               "</tr>\n";
6269
6270         foreach my $par (@$parents) {
6271                 print "<tr>" .
6272                       "<td>parent</td>" .
6273                       "<td class=\"sha1\">" .
6274                       $cgi->a({-href => href(action=>"commit", hash=>$par),
6275                                class => "list"}, $par) .
6276                       "</td>" .
6277                       "<td class=\"link\">" .
6278                       $cgi->a({-href => href(action=>"commit", hash=>$par)}, "commit") .
6279                       " | " .
6280                       $cgi->a({-href => href(action=>"commitdiff", hash=>$hash, hash_parent=>$par)}, "diff") .
6281                       "</td>" .
6282                       "</tr>\n";
6283         }
6284         print "</table>".
6285               "</div>\n";
6286
6287         print "<div class=\"page_body\">\n";
6288         git_print_log($co{'comment'});
6289         print "</div>\n";
6290
6291         git_difftree_body(\@difftree, $hash, @$parents);
6292
6293         git_footer_html();
6294 }
6295
6296 sub git_object {
6297         # object is defined by:
6298         # - hash or hash_base alone
6299         # - hash_base and file_name
6300         my $type;
6301
6302         # - hash or hash_base alone
6303         if ($hash || ($hash_base && !defined $file_name)) {
6304                 my $object_id = $hash || $hash_base;
6305
6306                 open my $fd, "-|", quote_command(
6307                         git_cmd(), 'cat-file', '-t', $object_id) . ' 2> /dev/null'
6308                         or die_error(404, "Object does not exist");
6309                 $type = <$fd>;
6310                 chomp $type;
6311                 close $fd
6312                         or die_error(404, "Object does not exist");
6313
6314         # - hash_base and file_name
6315         } elsif ($hash_base && defined $file_name) {
6316                 $file_name =~ s,/+$,,;
6317
6318                 system(git_cmd(), "cat-file", '-e', $hash_base) == 0
6319                         or die_error(404, "Base object does not exist");
6320
6321                 # here errors should not hapen
6322                 open my $fd, "-|", git_cmd(), "ls-tree", $hash_base, "--", $file_name
6323                         or die_error(500, "Open git-ls-tree failed");
6324                 my $line = <$fd>;
6325                 close $fd;
6326
6327                 #'100644 blob 0fa3f3a66fb6a137f6ec2c19351ed4d807070ffa  panic.c'
6328                 unless ($line && $line =~ m/^([0-9]+) (.+) ([0-9a-fA-F]{40})\t/) {
6329                         die_error(404, "File or directory for given base does not exist");
6330                 }
6331                 $type = $2;
6332                 $hash = $3;
6333         } else {
6334                 die_error(400, "Not enough information to find object");
6335         }
6336
6337         print $cgi->redirect(-uri => href(action=>$type, -full=>1,
6338                                           hash=>$hash, hash_base=>$hash_base,
6339                                           file_name=>$file_name),
6340                              -status => '302 Found');
6341 }
6342
6343 sub git_blobdiff {
6344         my $format = shift || 'html';
6345
6346         my $fd;
6347         my @difftree;
6348         my %diffinfo;
6349         my $expires;
6350
6351         # preparing $fd and %diffinfo for git_patchset_body
6352         # new style URI
6353         if (defined $hash_base && defined $hash_parent_base) {
6354                 if (defined $file_name) {
6355                         # read raw output
6356                         open $fd, "-|", git_cmd(), "diff-tree", '-r', @diff_opts,
6357                                 $hash_parent_base, $hash_base,
6358                                 "--", (defined $file_parent ? $file_parent : ()), $file_name
6359                                 or die_error(500, "Open git-diff-tree failed");
6360                         @difftree = map { chomp; $_ } <$fd>;
6361                         close $fd
6362                                 or die_error(404, "Reading git-diff-tree failed");
6363                         @difftree
6364                                 or die_error(404, "Blob diff not found");
6365
6366                 } elsif (defined $hash &&
6367                          $hash =~ /[0-9a-fA-F]{40}/) {
6368                         # try to find filename from $hash
6369
6370                         # read filtered raw output
6371                         open $fd, "-|", git_cmd(), "diff-tree", '-r', @diff_opts,
6372                                 $hash_parent_base, $hash_base, "--"
6373                                 or die_error(500, "Open git-diff-tree failed");
6374                         @difftree =
6375                                 # ':100644 100644 03b21826... 3b93d5e7... M     ls-files.c'
6376                                 # $hash == to_id
6377                                 grep { /^:[0-7]{6} [0-7]{6} [0-9a-fA-F]{40} $hash/ }
6378                                 map { chomp; $_ } <$fd>;
6379                         close $fd
6380                                 or die_error(404, "Reading git-diff-tree failed");
6381                         @difftree
6382                                 or die_error(404, "Blob diff not found");
6383
6384                 } else {
6385                         die_error(400, "Missing one of the blob diff parameters");
6386                 }
6387
6388                 if (@difftree > 1) {
6389                         die_error(400, "Ambiguous blob diff specification");
6390                 }
6391
6392                 %diffinfo = parse_difftree_raw_line($difftree[0]);
6393                 $file_parent ||= $diffinfo{'from_file'} || $file_name;
6394                 $file_name   ||= $diffinfo{'to_file'};
6395
6396                 $hash_parent ||= $diffinfo{'from_id'};
6397                 $hash        ||= $diffinfo{'to_id'};
6398
6399                 # non-textual hash id's can be cached
6400                 if ($hash_base =~ m/^[0-9a-fA-F]{40}$/ &&
6401                     $hash_parent_base =~ m/^[0-9a-fA-F]{40}$/) {
6402                         $expires = '+1d';
6403                 }
6404
6405                 # open patch output
6406                 open $fd, "-|", git_cmd(), "diff-tree", '-r', @diff_opts,
6407                         '-p', ($format eq 'html' ? "--full-index" : ()),
6408                         $hash_parent_base, $hash_base,
6409                         "--", (defined $file_parent ? $file_parent : ()), $file_name
6410                         or die_error(500, "Open git-diff-tree failed");
6411         }
6412
6413         # old/legacy style URI -- not generated anymore since 1.4.3.
6414         if (!%diffinfo) {
6415                 die_error('404 Not Found', "Missing one of the blob diff parameters")
6416         }
6417
6418         # header
6419         if ($format eq 'html') {
6420                 my $formats_nav =
6421                         $cgi->a({-href => href(action=>"blobdiff_plain", -replay=>1)},
6422                                 "raw");
6423                 git_header_html(undef, $expires);
6424                 if (defined $hash_base && (my %co = parse_commit($hash_base))) {
6425                         git_print_page_nav('','', $hash_base,$co{'tree'},$hash_base, $formats_nav);
6426                         git_print_header_div('commit', esc_html($co{'title'}), $hash_base);
6427                 } else {
6428                         print "<div class=\"page_nav\"><br/>$formats_nav<br/></div>\n";
6429                         print "<div class=\"title\">$hash vs $hash_parent</div>\n";
6430                 }
6431                 if (defined $file_name) {
6432                         git_print_page_path($file_name, "blob", $hash_base);
6433                 } else {
6434                         print "<div class=\"page_path\"></div>\n";
6435                 }
6436
6437         } elsif ($format eq 'plain') {
6438                 print $cgi->header(
6439                         -type => 'text/plain',
6440                         -charset => 'utf-8',
6441                         -expires => $expires,
6442                         -content_disposition => 'inline; filename="' . "$file_name" . '.patch"');
6443
6444                 print "X-Git-Url: " . $cgi->self_url() . "\n\n";
6445
6446         } else {
6447                 die_error(400, "Unknown blobdiff format");
6448         }
6449
6450         # patch
6451         if ($format eq 'html') {
6452                 print "<div class=\"page_body\">\n";
6453
6454                 git_patchset_body($fd, [ \%diffinfo ], $hash_base, $hash_parent_base);
6455                 close $fd;
6456
6457                 print "</div>\n"; # class="page_body"
6458                 git_footer_html();
6459
6460         } else {
6461                 while (my $line = <$fd>) {
6462                         $line =~ s!a/($hash|$hash_parent)!'a/'.esc_path($diffinfo{'from_file'})!eg;
6463                         $line =~ s!b/($hash|$hash_parent)!'b/'.esc_path($diffinfo{'to_file'})!eg;
6464
6465                         print $line;
6466
6467                         last if $line =~ m!^\+\+\+!;
6468                 }
6469                 local $/ = undef;
6470                 print <$fd>;
6471                 close $fd;
6472         }
6473 }
6474
6475 sub git_blobdiff_plain {
6476         git_blobdiff('plain');
6477 }
6478
6479 sub git_commitdiff {
6480         my %params = @_;
6481         my $format = $params{-format} || 'html';
6482
6483         my ($patch_max) = gitweb_get_feature('patches');
6484         if ($format eq 'patch') {
6485                 die_error(403, "Patch view not allowed") unless $patch_max;
6486         }
6487
6488         $hash ||= $hash_base || "HEAD";
6489         my %co = parse_commit($hash)
6490             or die_error(404, "Unknown commit object");
6491
6492         # choose format for commitdiff for merge
6493         if (! defined $hash_parent && @{$co{'parents'}} > 1) {
6494                 $hash_parent = '--cc';
6495         }
6496         # we need to prepare $formats_nav before almost any parameter munging
6497         my $formats_nav;
6498         if ($format eq 'html') {
6499                 $formats_nav =
6500                         $cgi->a({-href => href(action=>"commitdiff_plain", -replay=>1)},
6501                                 "raw");
6502                 if ($patch_max && @{$co{'parents'}} <= 1) {
6503                         $formats_nav .= " | " .
6504                                 $cgi->a({-href => href(action=>"patch", -replay=>1)},
6505                                         "patch");
6506                 }
6507
6508                 if (defined $hash_parent &&
6509                     $hash_parent ne '-c' && $hash_parent ne '--cc') {
6510                         # commitdiff with two commits given
6511                         my $hash_parent_short = $hash_parent;
6512                         if ($hash_parent =~ m/^[0-9a-fA-F]{40}$/) {
6513                                 $hash_parent_short = substr($hash_parent, 0, 7);
6514                         }
6515                         $formats_nav .=
6516                                 ' (from';
6517                         for (my $i = 0; $i < @{$co{'parents'}}; $i++) {
6518                                 if ($co{'parents'}[$i] eq $hash_parent) {
6519                                         $formats_nav .= ' parent ' . ($i+1);
6520                                         last;
6521                                 }
6522                         }
6523                         $formats_nav .= ': ' .
6524                                 $cgi->a({-href => href(action=>"commitdiff",
6525                                                        hash=>$hash_parent)},
6526                                         esc_html($hash_parent_short)) .
6527                                 ')';
6528                 } elsif (!$co{'parent'}) {
6529                         # --root commitdiff
6530                         $formats_nav .= ' (initial)';
6531                 } elsif (scalar @{$co{'parents'}} == 1) {
6532                         # single parent commit
6533                         $formats_nav .=
6534                                 ' (parent: ' .
6535                                 $cgi->a({-href => href(action=>"commitdiff",
6536                                                        hash=>$co{'parent'})},
6537                                         esc_html(substr($co{'parent'}, 0, 7))) .
6538                                 ')';
6539                 } else {
6540                         # merge commit
6541                         if ($hash_parent eq '--cc') {
6542                                 $formats_nav .= ' | ' .
6543                                         $cgi->a({-href => href(action=>"commitdiff",
6544                                                                hash=>$hash, hash_parent=>'-c')},
6545                                                 'combined');
6546                         } else { # $hash_parent eq '-c'
6547                                 $formats_nav .= ' | ' .
6548                                         $cgi->a({-href => href(action=>"commitdiff",
6549                                                                hash=>$hash, hash_parent=>'--cc')},
6550                                                 'compact');
6551                         }
6552                         $formats_nav .=
6553                                 ' (merge: ' .
6554                                 join(' ', map {
6555                                         $cgi->a({-href => href(action=>"commitdiff",
6556                                                                hash=>$_)},
6557                                                 esc_html(substr($_, 0, 7)));
6558                                 } @{$co{'parents'}} ) .
6559                                 ')';
6560                 }
6561         }
6562
6563         my $hash_parent_param = $hash_parent;
6564         if (!defined $hash_parent_param) {
6565                 # --cc for multiple parents, --root for parentless
6566                 $hash_parent_param =
6567                         @{$co{'parents'}} > 1 ? '--cc' : $co{'parent'} || '--root';
6568         }
6569
6570         # read commitdiff
6571         my $fd;
6572         my @difftree;
6573         if ($format eq 'html') {
6574                 open $fd, "-|", git_cmd(), "diff-tree", '-r', @diff_opts,
6575                         "--no-commit-id", "--patch-with-raw", "--full-index",
6576                         $hash_parent_param, $hash, "--"
6577                         or die_error(500, "Open git-diff-tree failed");
6578
6579                 while (my $line = <$fd>) {
6580                         chomp $line;
6581                         # empty line ends raw part of diff-tree output
6582                         last unless $line;
6583                         push @difftree, scalar parse_difftree_raw_line($line);
6584                 }
6585
6586         } elsif ($format eq 'plain') {
6587                 open $fd, "-|", git_cmd(), "diff-tree", '-r', @diff_opts,
6588                         '-p', $hash_parent_param, $hash, "--"
6589                         or die_error(500, "Open git-diff-tree failed");
6590         } elsif ($format eq 'patch') {
6591                 # For commit ranges, we limit the output to the number of
6592                 # patches specified in the 'patches' feature.
6593                 # For single commits, we limit the output to a single patch,
6594                 # diverging from the git-format-patch default.
6595                 my @commit_spec = ();
6596                 if ($hash_parent) {
6597                         if ($patch_max > 0) {
6598                                 push @commit_spec, "-$patch_max";
6599                         }
6600                         push @commit_spec, '-n', "$hash_parent..$hash";
6601                 } else {
6602                         if ($params{-single}) {
6603                                 push @commit_spec, '-1';
6604                         } else {
6605                                 if ($patch_max > 0) {
6606                                         push @commit_spec, "-$patch_max";
6607                                 }
6608                                 push @commit_spec, "-n";
6609                         }
6610                         push @commit_spec, '--root', $hash;
6611                 }
6612                 open $fd, "-|", git_cmd(), "format-patch", @diff_opts,
6613                         '--encoding=utf8', '--stdout', @commit_spec
6614                         or die_error(500, "Open git-format-patch failed");
6615         } else {
6616                 die_error(400, "Unknown commitdiff format");
6617         }
6618
6619         # non-textual hash id's can be cached
6620         my $expires;
6621         if ($hash =~ m/^[0-9a-fA-F]{40}$/) {
6622                 $expires = "+1d";
6623         }
6624
6625         # write commit message
6626         if ($format eq 'html') {
6627                 my $refs = git_get_references();
6628                 my $ref = format_ref_marker($refs, $co{'id'});
6629
6630                 git_header_html(undef, $expires);
6631                 git_print_page_nav('commitdiff','', $hash,$co{'tree'},$hash, $formats_nav);
6632                 git_print_header_div('commit', esc_html($co{'title'}) . $ref, $hash);
6633                 print "<div class=\"title_text\">\n" .
6634                       "<table class=\"object_header\">\n";
6635                 git_print_authorship_rows(\%co);
6636                 print "</table>".
6637                       "</div>\n";
6638                 print "<div class=\"page_body\">\n";
6639                 if (@{$co{'comment'}} > 1) {
6640                         print "<div class=\"log\">\n";
6641                         git_print_log($co{'comment'}, -final_empty_line=> 1, -remove_title => 1);
6642                         print "</div>\n"; # class="log"
6643                 }
6644
6645         } elsif ($format eq 'plain') {
6646                 my $refs = git_get_references("tags");
6647                 my $tagname = git_get_rev_name_tags($hash);
6648                 my $filename = basename($project) . "-$hash.patch";
6649
6650                 print $cgi->header(
6651                         -type => 'text/plain',
6652                         -charset => 'utf-8',
6653                         -expires => $expires,
6654                         -content_disposition => 'inline; filename="' . "$filename" . '"');
6655                 my %ad = parse_date($co{'author_epoch'}, $co{'author_tz'});
6656                 print "From: " . to_utf8($co{'author'}) . "\n";
6657                 print "Date: $ad{'rfc2822'} ($ad{'tz_local'})\n";
6658                 print "Subject: " . to_utf8($co{'title'}) . "\n";
6659
6660                 print "X-Git-Tag: $tagname\n" if $tagname;
6661                 print "X-Git-Url: " . $cgi->self_url() . "\n\n";
6662
6663                 foreach my $line (@{$co{'comment'}}) {
6664                         print to_utf8($line) . "\n";
6665                 }
6666                 print "---\n\n";
6667         } elsif ($format eq 'patch') {
6668                 my $filename = basename($project) . "-$hash.patch";
6669
6670                 print $cgi->header(
6671                         -type => 'text/plain',
6672                         -charset => 'utf-8',
6673                         -expires => $expires,
6674                         -content_disposition => 'inline; filename="' . "$filename" . '"');
6675         }
6676
6677         # write patch
6678         if ($format eq 'html') {
6679                 my $use_parents = !defined $hash_parent ||
6680                         $hash_parent eq '-c' || $hash_parent eq '--cc';
6681                 git_difftree_body(\@difftree, $hash,
6682                                   $use_parents ? @{$co{'parents'}} : $hash_parent);
6683                 print "<br/>\n";
6684
6685                 git_patchset_body($fd, \@difftree, $hash,
6686                                   $use_parents ? @{$co{'parents'}} : $hash_parent);
6687                 close $fd;
6688                 print "</div>\n"; # class="page_body"
6689                 git_footer_html();
6690
6691         } elsif ($format eq 'plain') {
6692                 local $/ = undef;
6693                 print <$fd>;
6694                 close $fd
6695                         or print "Reading git-diff-tree failed\n";
6696         } elsif ($format eq 'patch') {
6697                 local $/ = undef;
6698                 print <$fd>;
6699                 close $fd
6700                         or print "Reading git-format-patch failed\n";
6701         }
6702 }
6703
6704 sub git_commitdiff_plain {
6705         git_commitdiff(-format => 'plain');
6706 }
6707
6708 # format-patch-style patches
6709 sub git_patch {
6710         git_commitdiff(-format => 'patch', -single => 1);
6711 }
6712
6713 sub git_patches {
6714         git_commitdiff(-format => 'patch');
6715 }
6716
6717 sub git_history {
6718         git_log_generic('history', \&git_history_body,
6719                         $hash_base, $hash_parent_base,
6720                         $file_name, $hash);
6721 }
6722
6723 sub git_search {
6724         gitweb_check_feature('search') or die_error(403, "Search is disabled");
6725         if (!defined $searchtext) {
6726                 die_error(400, "Text field is empty");
6727         }
6728         if (!defined $hash) {
6729                 $hash = git_get_head_hash($project);
6730         }
6731         my %co = parse_commit($hash);
6732         if (!%co) {
6733                 die_error(404, "Unknown commit object");
6734         }
6735         if (!defined $page) {
6736                 $page = 0;
6737         }
6738
6739         $searchtype ||= 'commit';
6740         if ($searchtype eq 'pickaxe') {
6741                 # pickaxe may take all resources of your box and run for several minutes
6742                 # with every query - so decide by yourself how public you make this feature
6743                 gitweb_check_feature('pickaxe')
6744                     or die_error(403, "Pickaxe is disabled");
6745         }
6746         if ($searchtype eq 'grep') {
6747                 gitweb_check_feature('grep')
6748                     or die_error(403, "Grep is disabled");
6749         }
6750
6751         git_header_html();
6752
6753         if ($searchtype eq 'commit' or $searchtype eq 'author' or $searchtype eq 'committer') {
6754                 my $greptype;
6755                 if ($searchtype eq 'commit') {
6756                         $greptype = "--grep=";
6757                 } elsif ($searchtype eq 'author') {
6758                         $greptype = "--author=";
6759                 } elsif ($searchtype eq 'committer') {
6760                         $greptype = "--committer=";
6761                 }
6762                 $greptype .= $searchtext;
6763                 my @commitlist = parse_commits($hash, 101, (100 * $page), undef,
6764                                                $greptype, '--regexp-ignore-case',
6765                                                $search_use_regexp ? '--extended-regexp' : '--fixed-strings');
6766
6767                 my $paging_nav = '';
6768                 if ($page > 0) {
6769                         $paging_nav .=
6770                                 $cgi->a({-href => href(action=>"search", hash=>$hash,
6771                                                        searchtext=>$searchtext,
6772                                                        searchtype=>$searchtype)},
6773                                         "first");
6774                         $paging_nav .= " &sdot; " .
6775                                 $cgi->a({-href => href(-replay=>1, page=>$page-1),
6776                                          -accesskey => "p", -title => "Alt-p"}, "prev");
6777                 } else {
6778                         $paging_nav .= "first";
6779                         $paging_nav .= " &sdot; prev";
6780                 }
6781                 my $next_link = '';
6782                 if ($#commitlist >= 100) {
6783                         $next_link =
6784                                 $cgi->a({-href => href(-replay=>1, page=>$page+1),
6785                                          -accesskey => "n", -title => "Alt-n"}, "next");
6786                         $paging_nav .= " &sdot; $next_link";
6787                 } else {
6788                         $paging_nav .= " &sdot; next";
6789                 }
6790
6791                 git_print_page_nav('','', $hash,$co{'tree'},$hash, $paging_nav);
6792                 git_print_header_div('commit', esc_html($co{'title'}), $hash);
6793                 if ($page == 0 && !@commitlist) {
6794                         print "<p>No match.</p>\n";
6795                 } else {
6796                         git_search_grep_body(\@commitlist, 0, 99, $next_link);
6797                 }
6798         }
6799
6800         if ($searchtype eq 'pickaxe') {
6801                 git_print_page_nav('','', $hash,$co{'tree'},$hash);
6802                 git_print_header_div('commit', esc_html($co{'title'}), $hash);
6803
6804                 print "<table class=\"pickaxe search\">\n";
6805                 my $alternate = 1;
6806                 local $/ = "\n";
6807                 open my $fd, '-|', git_cmd(), '--no-pager', 'log', @diff_opts,
6808                         '--pretty=format:%H', '--no-abbrev', '--raw', "-S$searchtext",
6809                         ($search_use_regexp ? '--pickaxe-regex' : ());
6810                 undef %co;
6811                 my @files;
6812                 while (my $line = <$fd>) {
6813                         chomp $line;
6814                         next unless $line;
6815
6816                         my %set = parse_difftree_raw_line($line);
6817                         if (defined $set{'commit'}) {
6818                                 # finish previous commit
6819                                 if (%co) {
6820                                         print "</td>\n" .
6821                                               "<td class=\"link\">" .
6822                                               $cgi->a({-href => href(action=>"commit", hash=>$co{'id'})}, "commit") .
6823                                               " | " .
6824                                               $cgi->a({-href => href(action=>"tree", hash=>$co{'tree'}, hash_base=>$co{'id'})}, "tree");
6825                                         print "</td>\n" .
6826                                               "</tr>\n";
6827                                 }
6828
6829                                 if ($alternate) {
6830                                         print "<tr class=\"dark\">\n";
6831                                 } else {
6832                                         print "<tr class=\"light\">\n";
6833                                 }
6834                                 $alternate ^= 1;
6835                                 %co = parse_commit($set{'commit'});
6836                                 my $author = chop_and_escape_str($co{'author_name'}, 15, 5);
6837                                 print "<td title=\"$co{'age_string_age'}\"><i>$co{'age_string_date'}</i></td>\n" .
6838                                       "<td><i>$author</i></td>\n" .
6839                                       "<td>" .
6840                                       $cgi->a({-href => href(action=>"commit", hash=>$co{'id'}),
6841                                               -class => "list subject"},
6842                                               chop_and_escape_str($co{'title'}, 50) . "<br/>");
6843                         } elsif (defined $set{'to_id'}) {
6844                                 next if ($set{'to_id'} =~ m/^0{40}$/);
6845
6846                                 print $cgi->a({-href => href(action=>"blob", hash_base=>$co{'id'},
6847                                                              hash=>$set{'to_id'}, file_name=>$set{'to_file'}),
6848                                               -class => "list"},
6849                                               "<span class=\"match\">" . esc_path($set{'file'}) . "</span>") .
6850                                       "<br/>\n";
6851                         }
6852                 }
6853                 close $fd;
6854
6855                 # finish last commit (warning: repetition!)
6856                 if (%co) {
6857                         print "</td>\n" .
6858                               "<td class=\"link\">" .
6859                               $cgi->a({-href => href(action=>"commit", hash=>$co{'id'})}, "commit") .
6860                               " | " .
6861                               $cgi->a({-href => href(action=>"tree", hash=>$co{'tree'}, hash_base=>$co{'id'})}, "tree");
6862                         print "</td>\n" .
6863                               "</tr>\n";
6864                 }
6865
6866                 print "</table>\n";
6867         }
6868
6869         if ($searchtype eq 'grep') {
6870                 git_print_page_nav('','', $hash,$co{'tree'},$hash);
6871                 git_print_header_div('commit', esc_html($co{'title'}), $hash);
6872
6873                 print "<table class=\"grep_search\">\n";
6874                 my $alternate = 1;
6875                 my $matches = 0;
6876                 local $/ = "\n";
6877                 open my $fd, "-|", git_cmd(), 'grep', '-n',
6878                         $search_use_regexp ? ('-E', '-i') : '-F',
6879                         $searchtext, $co{'tree'};
6880                 my $lastfile = '';
6881                 while (my $line = <$fd>) {
6882                         chomp $line;
6883                         my ($file, $lno, $ltext, $binary);
6884                         last if ($matches++ > 1000);
6885                         if ($line =~ /^Binary file (.+) matches$/) {
6886                                 $file = $1;
6887                                 $binary = 1;
6888                         } else {
6889                                 (undef, $file, $lno, $ltext) = split(/:/, $line, 4);
6890                         }
6891                         if ($file ne $lastfile) {
6892                                 $lastfile and print "</td></tr>\n";
6893                                 if ($alternate++) {
6894                                         print "<tr class=\"dark\">\n";
6895                                 } else {
6896                                         print "<tr class=\"light\">\n";
6897                                 }
6898                                 print "<td class=\"list\">".
6899                                         $cgi->a({-href => href(action=>"blob", hash=>$co{'hash'},
6900                                                                file_name=>"$file"),
6901                                                 -class => "list"}, esc_path($file));
6902                                 print "</td><td>\n";
6903                                 $lastfile = $file;
6904                         }
6905                         if ($binary) {
6906                                 print "<div class=\"binary\">Binary file</div>\n";
6907                         } else {
6908                                 $ltext = untabify($ltext);
6909                                 if ($ltext =~ m/^(.*)($search_regexp)(.*)$/i) {
6910                                         $ltext = esc_html($1, -nbsp=>1);
6911                                         $ltext .= '<span class="match">';
6912                                         $ltext .= esc_html($2, -nbsp=>1);
6913                                         $ltext .= '</span>';
6914                                         $ltext .= esc_html($3, -nbsp=>1);
6915                                 } else {
6916                                         $ltext = esc_html($ltext, -nbsp=>1);
6917                                 }
6918                                 print "<div class=\"pre\">" .
6919                                         $cgi->a({-href => href(action=>"blob", hash=>$co{'hash'},
6920                                                                file_name=>"$file").'#l'.$lno,
6921                                                 -class => "linenr"}, sprintf('%4i', $lno))
6922                                         . ' ' .  $ltext . "</div>\n";
6923                         }
6924                 }
6925                 if ($lastfile) {
6926                         print "</td></tr>\n";
6927                         if ($matches > 1000) {
6928                                 print "<div class=\"diff nodifferences\">Too many matches, listing trimmed</div>\n";
6929                         }
6930                 } else {
6931                         print "<div class=\"diff nodifferences\">No matches found</div>\n";
6932                 }
6933                 close $fd;
6934
6935                 print "</table>\n";
6936         }
6937         git_footer_html();
6938 }
6939
6940 sub git_search_help {
6941         git_header_html();
6942         git_print_page_nav('','', $hash,$hash,$hash);
6943         print <<EOT;
6944 <p><strong>Pattern</strong> is by default a normal string that is matched precisely (but without
6945 regard to case, except in the case of pickaxe). However, when you check the <em>re</em> checkbox,
6946 the pattern entered is recognized as the POSIX extended
6947 <a href="http://en.wikipedia.org/wiki/Regular_expression">regular expression</a> (also case
6948 insensitive).</p>
6949 <dl>
6950 <dt><b>commit</b></dt>
6951 <dd>The commit messages and authorship information will be scanned for the given pattern.</dd>
6952 EOT
6953         my $have_grep = gitweb_check_feature('grep');
6954         if ($have_grep) {
6955                 print <<EOT;
6956 <dt><b>grep</b></dt>
6957 <dd>All files in the currently selected tree (HEAD unless you are explicitly browsing
6958     a different one) are searched for the given pattern. On large trees, this search can take
6959 a while and put some strain on the server, so please use it with some consideration. Note that
6960 due to git-grep peculiarity, currently if regexp mode is turned off, the matches are
6961 case-sensitive.</dd>
6962 EOT
6963         }
6964         print <<EOT;
6965 <dt><b>author</b></dt>
6966 <dd>Name and e-mail of the change author and date of birth of the patch will be scanned for the given pattern.</dd>
6967 <dt><b>committer</b></dt>
6968 <dd>Name and e-mail of the committer and date of commit will be scanned for the given pattern.</dd>
6969 EOT
6970         my $have_pickaxe = gitweb_check_feature('pickaxe');
6971         if ($have_pickaxe) {
6972                 print <<EOT;
6973 <dt><b>pickaxe</b></dt>
6974 <dd>All commits that caused the string to appear or disappear from any file (changes that
6975 added, removed or "modified" the string) will be listed. This search can take a while and
6976 takes a lot of strain on the server, so please use it wisely. Note that since you may be
6977 interested even in changes just changing the case as well, this search is case sensitive.</dd>
6978 EOT
6979         }
6980         print "</dl>\n";
6981         git_footer_html();
6982 }
6983
6984 sub git_shortlog {
6985         git_log_generic('shortlog', \&git_shortlog_body,
6986                         $hash, $hash_parent);
6987 }
6988
6989 ## ......................................................................
6990 ## feeds (RSS, Atom; OPML)
6991
6992 sub git_feed {
6993         my $format = shift || 'atom';
6994         my $have_blame = gitweb_check_feature('blame');
6995
6996         # Atom: http://www.atomenabled.org/developers/syndication/
6997         # RSS:  http://www.notestips.com/80256B3A007F2692/1/NAMO5P9UPQ
6998         if ($format ne 'rss' && $format ne 'atom') {
6999                 die_error(400, "Unknown web feed format");
7000         }
7001
7002         # log/feed of current (HEAD) branch, log of given branch, history of file/directory
7003         my $head = $hash || 'HEAD';
7004         my @commitlist = parse_commits($head, 150, 0, $file_name);
7005
7006         my %latest_commit;
7007         my %latest_date;
7008         my $content_type = "application/$format+xml";
7009         if (defined $cgi->http('HTTP_ACCEPT') &&
7010                  $cgi->Accept('text/xml') > $cgi->Accept($content_type)) {
7011                 # browser (feed reader) prefers text/xml
7012                 $content_type = 'text/xml';
7013         }
7014         if (defined($commitlist[0])) {
7015                 %latest_commit = %{$commitlist[0]};
7016                 my $latest_epoch = $latest_commit{'committer_epoch'};
7017                 %latest_date   = parse_date($latest_epoch);
7018                 my $if_modified = $cgi->http('IF_MODIFIED_SINCE');
7019                 if (defined $if_modified) {
7020                         my $since;
7021                         if (eval { require HTTP::Date; 1; }) {
7022                                 $since = HTTP::Date::str2time($if_modified);
7023                         } elsif (eval { require Time::ParseDate; 1; }) {
7024                                 $since = Time::ParseDate::parsedate($if_modified, GMT => 1);
7025                         }
7026                         if (defined $since && $latest_epoch <= $since) {
7027                                 print $cgi->header(
7028                                         -type => $content_type,
7029                                         -charset => 'utf-8',
7030                                         -last_modified => $latest_date{'rfc2822'},
7031                                         -status => '304 Not Modified');
7032                                 return;
7033                         }
7034                 }
7035                 print $cgi->header(
7036                         -type => $content_type,
7037                         -charset => 'utf-8',
7038                         -last_modified => $latest_date{'rfc2822'});
7039         } else {
7040                 print $cgi->header(
7041                         -type => $content_type,
7042                         -charset => 'utf-8');
7043         }
7044
7045         # Optimization: skip generating the body if client asks only
7046         # for Last-Modified date.
7047         return if ($cgi->request_method() eq 'HEAD');
7048
7049         # header variables
7050         my $title = "$site_name - $project/$action";
7051         my $feed_type = 'log';
7052         if (defined $hash) {
7053                 $title .= " - '$hash'";
7054                 $feed_type = 'branch log';
7055                 if (defined $file_name) {
7056                         $title .= " :: $file_name";
7057                         $feed_type = 'history';
7058                 }
7059         } elsif (defined $file_name) {
7060                 $title .= " - $file_name";
7061                 $feed_type = 'history';
7062         }
7063         $title .= " $feed_type";
7064         my $descr = git_get_project_description($project);
7065         if (defined $descr) {
7066                 $descr = esc_html($descr);
7067         } else {
7068                 $descr = "$project " .
7069                          ($format eq 'rss' ? 'RSS' : 'Atom') .
7070                          " feed";
7071         }
7072         my $owner = git_get_project_owner($project);
7073         $owner = esc_html($owner);
7074
7075         #header
7076         my $alt_url;
7077         if (defined $file_name) {
7078                 $alt_url = href(-full=>1, action=>"history", hash=>$hash, file_name=>$file_name);
7079         } elsif (defined $hash) {
7080                 $alt_url = href(-full=>1, action=>"log", hash=>$hash);
7081         } else {
7082                 $alt_url = href(-full=>1, action=>"summary");
7083         }
7084         print qq!<?xml version="1.0" encoding="utf-8"?>\n!;
7085         if ($format eq 'rss') {
7086                 print <<XML;
7087 <rss version="2.0" xmlns:content="http://purl.org/rss/1.0/modules/content/">
7088 <channel>
7089 XML
7090                 print "<title>$title</title>\n" .
7091                       "<link>$alt_url</link>\n" .
7092                       "<description>$descr</description>\n" .
7093                       "<language>en</language>\n" .
7094                       # project owner is responsible for 'editorial' content
7095                       "<managingEditor>$owner</managingEditor>\n";
7096                 if (defined $logo || defined $favicon) {
7097                         # prefer the logo to the favicon, since RSS
7098                         # doesn't allow both
7099                         my $img = esc_url($logo || $favicon);
7100                         print "<image>\n" .
7101                               "<url>$img</url>\n" .
7102                               "<title>$title</title>\n" .
7103                               "<link>$alt_url</link>\n" .
7104                               "</image>\n";
7105                 }
7106                 if (%latest_date) {
7107                         print "<pubDate>$latest_date{'rfc2822'}</pubDate>\n";
7108                         print "<lastBuildDate>$latest_date{'rfc2822'}</lastBuildDate>\n";
7109                 }
7110                 print "<generator>gitweb v.$version/$git_version</generator>\n";
7111         } elsif ($format eq 'atom') {
7112                 print <<XML;
7113 <feed xmlns="http://www.w3.org/2005/Atom">
7114 XML
7115                 print "<title>$title</title>\n" .
7116                       "<subtitle>$descr</subtitle>\n" .
7117                       '<link rel="alternate" type="text/html" href="' .
7118                       $alt_url . '" />' . "\n" .
7119                       '<link rel="self" type="' . $content_type . '" href="' .
7120                       $cgi->self_url() . '" />' . "\n" .
7121                       "<id>" . href(-full=>1) . "</id>\n" .
7122                       # use project owner for feed author
7123                       "<author><name>$owner</name></author>\n";
7124                 if (defined $favicon) {
7125                         print "<icon>" . esc_url($favicon) . "</icon>\n";
7126                 }
7127                 if (defined $logo_url) {
7128                         # not twice as wide as tall: 72 x 27 pixels
7129                         print "<logo>" . esc_url($logo) . "</logo>\n";
7130                 }
7131                 if (! %latest_date) {
7132                         # dummy date to keep the feed valid until commits trickle in:
7133                         print "<updated>1970-01-01T00:00:00Z</updated>\n";
7134                 } else {
7135                         print "<updated>$latest_date{'iso-8601'}</updated>\n";
7136                 }
7137                 print "<generator version='$version/$git_version'>gitweb</generator>\n";
7138         }
7139
7140         # contents
7141         for (my $i = 0; $i <= $#commitlist; $i++) {
7142                 my %co = %{$commitlist[$i]};
7143                 my $commit = $co{'id'};
7144                 # we read 150, we always show 30 and the ones more recent than 48 hours
7145                 if (($i >= 20) && ((time - $co{'author_epoch'}) > 48*60*60)) {
7146                         last;
7147                 }
7148                 my %cd = parse_date($co{'author_epoch'});
7149
7150                 # get list of changed files
7151                 open my $fd, "-|", git_cmd(), "diff-tree", '-r', @diff_opts,
7152                         $co{'parent'} || "--root",
7153                         $co{'id'}, "--", (defined $file_name ? $file_name : ())
7154                         or next;
7155                 my @difftree = map { chomp; $_ } <$fd>;
7156                 close $fd
7157                         or next;
7158
7159                 # print element (entry, item)
7160                 my $co_url = href(-full=>1, action=>"commitdiff", hash=>$commit);
7161                 if ($format eq 'rss') {
7162                         print "<item>\n" .
7163                               "<title>" . esc_html($co{'title'}) . "</title>\n" .
7164                               "<author>" . esc_html($co{'author'}) . "</author>\n" .
7165                               "<pubDate>$cd{'rfc2822'}</pubDate>\n" .
7166                               "<guid isPermaLink=\"true\">$co_url</guid>\n" .
7167                               "<link>$co_url</link>\n" .
7168                               "<description>" . esc_html($co{'title'}) . "</description>\n" .
7169                               "<content:encoded>" .
7170                               "<![CDATA[\n";
7171                 } elsif ($format eq 'atom') {
7172                         print "<entry>\n" .
7173                               "<title type=\"html\">" . esc_html($co{'title'}) . "</title>\n" .
7174                               "<updated>$cd{'iso-8601'}</updated>\n" .
7175                               "<author>\n" .
7176                               "  <name>" . esc_html($co{'author_name'}) . "</name>\n";
7177                         if ($co{'author_email'}) {
7178                                 print "  <email>" . esc_html($co{'author_email'}) . "</email>\n";
7179                         }
7180                         print "</author>\n" .
7181                               # use committer for contributor
7182                               "<contributor>\n" .
7183                               "  <name>" . esc_html($co{'committer_name'}) . "</name>\n";
7184                         if ($co{'committer_email'}) {
7185                                 print "  <email>" . esc_html($co{'committer_email'}) . "</email>\n";
7186                         }
7187                         print "</contributor>\n" .
7188                               "<published>$cd{'iso-8601'}</published>\n" .
7189                               "<link rel=\"alternate\" type=\"text/html\" href=\"$co_url\" />\n" .
7190                               "<id>$co_url</id>\n" .
7191                               "<content type=\"xhtml\" xml:base=\"" . esc_url($my_url) . "\">\n" .
7192                               "<div xmlns=\"http://www.w3.org/1999/xhtml\">\n";
7193                 }
7194                 my $comment = $co{'comment'};
7195                 print "<pre>\n";
7196                 foreach my $line (@$comment) {
7197                         $line = esc_html($line);
7198                         print "$line\n";
7199                 }
7200                 print "</pre><ul>\n";
7201                 foreach my $difftree_line (@difftree) {
7202                         my %difftree = parse_difftree_raw_line($difftree_line);
7203                         next if !$difftree{'from_id'};
7204
7205                         my $file = $difftree{'file'} || $difftree{'to_file'};
7206
7207                         print "<li>" .
7208                               "[" .
7209                               $cgi->a({-href => href(-full=>1, action=>"blobdiff",
7210                                                      hash=>$difftree{'to_id'}, hash_parent=>$difftree{'from_id'},
7211                                                      hash_base=>$co{'id'}, hash_parent_base=>$co{'parent'},
7212                                                      file_name=>$file, file_parent=>$difftree{'from_file'}),
7213                                       -title => "diff"}, 'D');
7214                         if ($have_blame) {
7215                                 print $cgi->a({-href => href(-full=>1, action=>"blame",
7216                                                              file_name=>$file, hash_base=>$commit),
7217                                               -title => "blame"}, 'B');
7218                         }
7219                         # if this is not a feed of a file history
7220                         if (!defined $file_name || $file_name ne $file) {
7221                                 print $cgi->a({-href => href(-full=>1, action=>"history",
7222                                                              file_name=>$file, hash=>$commit),
7223                                               -title => "history"}, 'H');
7224                         }
7225                         $file = esc_path($file);
7226                         print "] ".
7227                               "$file</li>\n";
7228                 }
7229                 if ($format eq 'rss') {
7230                         print "</ul>]]>\n" .
7231                               "</content:encoded>\n" .
7232                               "</item>\n";
7233                 } elsif ($format eq 'atom') {
7234                         print "</ul>\n</div>\n" .
7235                               "</content>\n" .
7236                               "</entry>\n";
7237                 }
7238         }
7239
7240         # end of feed
7241         if ($format eq 'rss') {
7242                 print "</channel>\n</rss>\n";
7243         } elsif ($format eq 'atom') {
7244                 print "</feed>\n";
7245         }
7246 }
7247
7248 sub git_rss {
7249         git_feed('rss');
7250 }
7251
7252 sub git_atom {
7253         git_feed('atom');
7254 }
7255
7256 sub git_opml {
7257         my @list = git_get_projects_list();
7258
7259         print $cgi->header(
7260                 -type => 'text/xml',
7261                 -charset => 'utf-8',
7262                 -content_disposition => 'inline; filename="opml.xml"');
7263
7264         print <<XML;
7265 <?xml version="1.0" encoding="utf-8"?>
7266 <opml version="1.0">
7267 <head>
7268   <title>$site_name OPML Export</title>
7269 </head>
7270 <body>
7271 <outline text="git RSS feeds">
7272 XML
7273
7274         foreach my $pr (@list) {
7275                 my %proj = %$pr;
7276                 my $head = git_get_head_hash($proj{'path'});
7277                 if (!defined $head) {
7278                         next;
7279                 }
7280                 $git_dir = "$projectroot/$proj{'path'}";
7281                 my %co = parse_commit($head);
7282                 if (!%co) {
7283                         next;
7284                 }
7285
7286                 my $path = esc_html(chop_str($proj{'path'}, 25, 5));
7287                 my $rss  = href('project' => $proj{'path'}, 'action' => 'rss', -full => 1);
7288                 my $html = href('project' => $proj{'path'}, 'action' => 'summary', -full => 1);
7289                 print "<outline type=\"rss\" text=\"$path\" title=\"$path\" xmlUrl=\"$rss\" htmlUrl=\"$html\"/>\n";
7290         }
7291         print <<XML;
7292 </outline>
7293 </body>
7294 </opml>
7295 XML
7296 }