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         # $feature{'highlight'}{'default'} = [1];
 491
 492         'highlight' => {
 493                 'sub' => sub { feature_bool('highlight', @_) },
 494                 'override' => 0,
 495                 'default' => [0]},
 496 );
 497
 498 sub gitweb_get_feature {
 499         my ($name) = @_;
 500         return unless exists $feature{$name};
 501         my ($sub, $override, @defaults) = (
 502                 $feature{$name}{'sub'},
 503                 $feature{$name}{'override'},
 504                 @{$feature{$name}{'default'}});
 505         # project specific override is possible only if we have project
 506         our $git_dir; # global variable, declared later
 507         if (!$override || !defined $git_dir) {
 508                 return @defaults;
 509         }
 510         if (!defined $sub) {
 511                 warn "feature $name is not overridable";
 512                 return @defaults;
 513         }
 514         return $sub->(@defaults);
 515 }
 516
 517 # A wrapper to check if a given feature is enabled.
 518 # With this, you can say
 519 #
 520 #   my $bool_feat = gitweb_check_feature('bool_feat');
 521 #   gitweb_check_feature('bool_feat') or somecode;
 522 #
 523 # instead of
 524 #
 525 #   my ($bool_feat) = gitweb_get_feature('bool_feat');
 526 #   (gitweb_get_feature('bool_feat'))[0] or somecode;
 527 #
 528 sub gitweb_check_feature {
 529         return (gitweb_get_feature(@_))[0];
 530 }
 531
 532
 533 sub feature_bool {
 534         my $key = shift;
 535         my ($val) = git_get_project_config($key, '--bool');
 536
 537         if (!defined $val) {
 538                 return ($_[0]);
 539         } elsif ($val eq 'true') {
 540                 return (1);
 541         } elsif ($val eq 'false') {
 542                 return (0);
 543         }
 544 }
 545
 546 sub feature_snapshot {
 547         my (@fmts) = @_;
 548
 549         my ($val) = git_get_project_config('snapshot');
 550
 551         if ($val) {
 552                 @fmts = ($val eq 'none' ? () : split /\s*[,\s]\s*/, $val);
 553         }
 554
 555         return @fmts;
 556 }
 557
 558 sub feature_patches {
 559         my @val = (git_get_project_config('patches', '--int'));
 560
 561         if (@val) {
 562                 return @val;
 563         }
 564
 565         return ($_[0]);
 566 }
 567
 568 sub feature_avatar {
 569         my @val = (git_get_project_config('avatar'));
 570
 571         return @val ? @val : @_;
 572 }
 573
 574 # checking HEAD file with -e is fragile if the repository was
 575 # initialized long time ago (i.e. symlink HEAD) and was pack-ref'ed
 576 # and then pruned.
 577 sub check_head_link {
 578         my ($dir) = @_;
 579         my $headfile = "$dir/HEAD";
 580         return ((-e $headfile) ||
 581                 (-l $headfile && readlink($headfile) =~ /^refs\/heads\//));
 582 }
 583
 584 sub check_export_ok {
 585         my ($dir) = @_;
 586         return (check_head_link($dir) &&
 587                 (!$export_ok || -e "$dir/$export_ok") &&
 588                 (!$export_auth_hook || $export_auth_hook->($dir)));
 589 }
 590
 591 # process alternate names for backward compatibility
 592 # filter out unsupported (unknown) snapshot formats
 593 sub filter_snapshot_fmts {
 594         my @fmts = @_;
 595
 596         @fmts = map {
 597                 exists $known_snapshot_format_aliases{$_} ?
 598                        $known_snapshot_format_aliases{$_} : $_} @fmts;
 599         @fmts = grep {
 600                 exists $known_snapshot_formats{$_} &&
 601                 !$known_snapshot_formats{$_}{'disabled'}} @fmts;
 602 }
 603
 604 # If it is set to code reference, it is code that it is to be run once per
 605 # request, allowing updating configurations that change with each request,
 606 # while running other code in config file only once.
 607 #
 608 # Otherwise, if it is false then gitweb would process config file only once;
 609 # if it is true then gitweb config would be run for each request.
 610 our $per_request_config = 1;
 611
 612 our ($GITWEB_CONFIG, $GITWEB_CONFIG_SYSTEM);
 613 sub evaluate_gitweb_config {
 614         our $GITWEB_CONFIG = $ENV{'GITWEB_CONFIG'} || "++GITWEB_CONFIG++";
 615         our $GITWEB_CONFIG_SYSTEM = $ENV{'GITWEB_CONFIG_SYSTEM'} || "++GITWEB_CONFIG_SYSTEM++";
 616         # die if there are errors parsing config file
 617         if (-e $GITWEB_CONFIG) {
 618                 do $GITWEB_CONFIG;
 619                 die $@ if $@;
 620         } elsif (-e $GITWEB_CONFIG_SYSTEM) {
 621                 do $GITWEB_CONFIG_SYSTEM;
 622                 die $@ if $@;
 623         }
 624 }
 625
 626 # Get loadavg of system, to compare against $maxload.
 627 # Currently it requires '/proc/loadavg' present to get loadavg;
 628 # if it is not present it returns 0, which means no load checking.
 629 sub get_loadavg {
 630         if( -e '/proc/loadavg' ){
 631                 open my $fd, '<', '/proc/loadavg'
 632                         or return 0;
 633                 my @load = split(/\s+/, scalar <$fd>);
 634                 close $fd;
 635
 636                 # The first three columns measure CPU and IO utilization of the last one,
 637                 # five, and 10 minute periods.  The fourth column shows the number of
 638                 # currently running processes and the total number of processes in the m/n
 639                 # format.  The last column displays the last process ID used.
 640                 return $load[0] || 0;
 641         }
 642         # additional checks for load average should go here for things that don't export
 643         # /proc/loadavg
 644
 645         return 0;
 646 }
 647
 648 # version of the core git binary
 649 our $git_version;
 650 sub evaluate_git_version {
 651         our $git_version = qx("$GIT" --version) =~ m/git version (.*)$/ ? $1 : "unknown";
 652         $number_of_git_cmds++;
 653 }
 654
 655 sub check_loadavg {
 656         if (defined $maxload && get_loadavg() > $maxload) {
 657                 die_error(503, "The load average on the server is too high");
 658         }
 659 }
 660
 661 # ======================================================================
 662 # input validation and dispatch
 663
 664 # input parameters can be collected from a variety of sources (presently, CGI
 665 # and PATH_INFO), so we define an %input_params hash that collects them all
 666 # together during validation: this allows subsequent uses (e.g. href()) to be
 667 # agnostic of the parameter origin
 668
 669 our %input_params = ();
 670
 671 # input parameters are stored with the long parameter name as key. This will
 672 # also be used in the href subroutine to convert parameters to their CGI
 673 # equivalent, and since the href() usage is the most frequent one, we store
 674 # the name -> CGI key mapping here, instead of the reverse.
 675 #
 676 # XXX: Warning: If you touch this, check the search form for updating,
 677 # too.
 678
 679 our @cgi_param_mapping = (
 680         project => "p",
 681         action => "a",
 682         file_name => "f",
 683         file_parent => "fp",
 684         hash => "h",
 685         hash_parent => "hp",
 686         hash_base => "hb",
 687         hash_parent_base => "hpb",
 688         page => "pg",
 689         order => "o",
 690         searchtext => "s",
 691         searchtype => "st",
 692         snapshot_format => "sf",
 693         extra_options => "opt",
 694         search_use_regexp => "sr",
 695         # this must be last entry (for manipulation from JavaScript)
 696         javascript => "js"
 697 );
 698 our %cgi_param_mapping = @cgi_param_mapping;
 699
 700 # we will also need to know the possible actions, for validation
 701 our %actions = (
 702         "blame" => \&git_blame,
 703         "blame_incremental" => \&git_blame_incremental,
 704         "blame_data" => \&git_blame_data,
 705         "blobdiff" => \&git_blobdiff,
 706         "blobdiff_plain" => \&git_blobdiff_plain,
 707         "blob" => \&git_blob,
 708         "blob_plain" => \&git_blob_plain,
 709         "commitdiff" => \&git_commitdiff,
 710         "commitdiff_plain" => \&git_commitdiff_plain,
 711         "commit" => \&git_commit,
 712         "forks" => \&git_forks,
 713         "heads" => \&git_heads,
 714         "history" => \&git_history,
 715         "log" => \&git_log,
 716         "patch" => \&git_patch,
 717         "patches" => \&git_patches,
 718         "rss" => \&git_rss,
 719         "atom" => \&git_atom,
 720         "search" => \&git_search,
 721         "search_help" => \&git_search_help,
 722         "shortlog" => \&git_shortlog,
 723         "summary" => \&git_summary,
 724         "tag" => \&git_tag,
 725         "tags" => \&git_tags,
 726         "tree" => \&git_tree,
 727         "snapshot" => \&git_snapshot,
 728         "object" => \&git_object,
 729         # those below don't need $project
 730         "opml" => \&git_opml,
 731         "project_list" => \&git_project_list,
 732         "project_index" => \&git_project_index,
 733 );
 734
 735 # finally, we have the hash of allowed extra_options for the commands that
 736 # allow them
 737 our %allowed_options = (
 738         "--no-merges" => [ qw(rss atom log shortlog history) ],
 739 );
 740
 741 # fill %input_params with the CGI parameters. All values except for 'opt'
 742 # should be single values, but opt can be an array. We should probably
 743 # build an array of parameters that can be multi-valued, but since for the time
 744 # being it's only this one, we just single it out
 745 sub evaluate_query_params {
 746         our $cgi;
 747
 748         while (my ($name, $symbol) = each %cgi_param_mapping) {
 749                 if ($symbol eq 'opt') {
 750                         $input_params{$name} = [ $cgi->param($symbol) ];
 751                 } else {
 752                         $input_params{$name} = $cgi->param($symbol);
 753                 }
 754         }
 755 }
 756
 757 # now read PATH_INFO and update the parameter list for missing parameters
 758 sub evaluate_path_info {
 759         return if defined $input_params{'project'};
 760         return if !$path_info;
 761         $path_info =~ s,^/+,,;
 762         return if !$path_info;
 763
 764         # find which part of PATH_INFO is project
 765         my $project = $path_info;
 766         $project =~ s,/+$,,;
 767         while ($project && !check_head_link("$projectroot/$project")) {
 768                 $project =~ s,/*[^/]*$,,;
 769         }
 770         return unless $project;
 771         $input_params{'project'} = $project;
 772
 773         # do not change any parameters if an action is given using the query string
 774         return if $input_params{'action'};
 775         $path_info =~ s,^\Q$project\E/*,,;
 776
 777         # next, check if we have an action
 778         my $action = $path_info;
 779         $action =~ s,/.*$,,;
 780         if (exists $actions{$action}) {
 781                 $path_info =~ s,^$action/*,,;
 782                 $input_params{'action'} = $action;
 783         }
 784
 785         # list of actions that want hash_base instead of hash, but can have no
 786         # pathname (f) parameter
 787         my @wants_base = (
 788                 'tree',
 789                 'history',
 790         );
 791
 792         # we want to catch, among others
 793         # [$hash_parent_base[:$file_parent]..]$hash_parent[:$file_name]
 794         my ($parentrefname, $parentpathname, $refname, $pathname) =
 795                 ($path_info =~ /^(?:(.+?)(?::(.+))?\.\.)?([^:]+?)?(?::(.+))?$/);
 796
 797         # first, analyze the 'current' part
 798         if (defined $pathname) {
 799                 # we got "branch:filename" or "branch:dir/"
 800                 # we could use git_get_type(branch:pathname), but:
 801                 # - it needs $git_dir
 802                 # - it does a git() call
 803                 # - the convention of terminating directories with a slash
 804                 #   makes it superfluous
 805                 # - embedding the action in the PATH_INFO would make it even
 806                 #   more superfluous
 807                 $pathname =~ s,^/+,,;
 808                 if (!$pathname || substr($pathname, -1) eq "/") {
 809                         $input_params{'action'} ||= "tree";
 810                         $pathname =~ s,/$,,;
 811                 } else {
 812                         # the default action depends on whether we had parent info
 813                         # or not
 814                         if ($parentrefname) {
 815                                 $input_params{'action'} ||= "blobdiff_plain";
 816                         } else {
 817                                 $input_params{'action'} ||= "blob_plain";
 818                         }
 819                 }
 820                 $input_params{'hash_base'} ||= $refname;
 821                 $input_params{'file_name'} ||= $pathname;
 822         } elsif (defined $refname) {
 823                 # we got "branch". In this case we have to choose if we have to
 824                 # set hash or hash_base.
 825                 #
 826                 # Most of the actions without a pathname only want hash to be
 827                 # set, except for the ones specified in @wants_base that want
 828                 # hash_base instead. It should also be noted that hand-crafted
 829                 # links having 'history' as an action and no pathname or hash
 830                 # set will fail, but that happens regardless of PATH_INFO.
 831                 if (defined $parentrefname) {
 832                         # if there is parent let the default be 'shortlog' action
 833                         # (for http://git.example.com/repo.git/A..B links); if there
 834                         # is no parent, dispatch will detect type of object and set
 835                         # action appropriately if required (if action is not set)
 836                         $input_params{'action'} ||= "shortlog";
 837                 }
 838                 if ($input_params{'action'} &&
 839                     grep { $_ eq $input_params{'action'} } @wants_base) {
 840                         $input_params{'hash_base'} ||= $refname;
 841                 } else {
 842                         $input_params{'hash'} ||= $refname;
 843                 }
 844         }
 845
 846         # next, handle the 'parent' part, if present
 847         if (defined $parentrefname) {
 848                 # a missing pathspec defaults to the 'current' filename, allowing e.g.
 849                 # someproject/blobdiff/oldrev..newrev:/filename
 850                 if ($parentpathname) {
 851                         $parentpathname =~ s,^/+,,;
 852                         $parentpathname =~ s,/$,,;
 853                         $input_params{'file_parent'} ||= $parentpathname;
 854                 } else {
 855                         $input_params{'file_parent'} ||= $input_params{'file_name'};
 856                 }
 857                 # we assume that hash_parent_base is wanted if a path was specified,
 858                 # or if the action wants hash_base instead of hash
 859                 if (defined $input_params{'file_parent'} ||
 860                         grep { $_ eq $input_params{'action'} } @wants_base) {
 861                         $input_params{'hash_parent_base'} ||= $parentrefname;
 862                 } else {
 863                         $input_params{'hash_parent'} ||= $parentrefname;
 864                 }
 865         }
 866
 867         # for the snapshot action, we allow URLs in the form
 868         # $project/snapshot/$hash.ext
 869         # where .ext determines the snapshot and gets removed from the
 870         # passed $refname to provide the $hash.
 871         #
 872         # To be able to tell that $refname includes the format extension, we
 873         # require the following two conditions to be satisfied:
 874         # - the hash input parameter MUST have been set from the $refname part
 875         #   of the URL (i.e. they must be equal)
 876         # - the snapshot format MUST NOT have been defined already (e.g. from
 877         #   CGI parameter sf)
 878         # It's also useless to try any matching unless $refname has a dot,
 879         # so we check for that too
 880         if (defined $input_params{'action'} &&
 881                 $input_params{'action'} eq 'snapshot' &&
 882                 defined $refname && index($refname, '.') != -1 &&
 883                 $refname eq $input_params{'hash'} &&
 884                 !defined $input_params{'snapshot_format'}) {
 885                 # We loop over the known snapshot formats, checking for
 886                 # extensions. Allowed extensions are both the defined suffix
 887                 # (which includes the initial dot already) and the snapshot
 888                 # format key itself, with a prepended dot
 889                 while (my ($fmt, $opt) = each %known_snapshot_formats) {
 890                         my $hash = $refname;
 891                         unless ($hash =~ s/(\Q$opt->{'suffix'}\E|\Q.$fmt\E)$//) {
 892                                 next;
 893                         }
 894                         my $sfx = $1;
 895                         # a valid suffix was found, so set the snapshot format
 896                         # and reset the hash parameter
 897                         $input_params{'snapshot_format'} = $fmt;
 898                         $input_params{'hash'} = $hash;
 899                         # we also set the format suffix to the one requested
 900                         # in the URL: this way a request for e.g. .tgz returns
 901                         # a .tgz instead of a .tar.gz
 902                         $known_snapshot_formats{$fmt}{'suffix'} = $sfx;
 903                         last;
 904                 }
 905         }
 906 }
 907
 908 our ($action, $project, $file_name, $file_parent, $hash, $hash_parent, $hash_base,
 909      $hash_parent_base, @extra_options, $page, $searchtype, $search_use_regexp,
 910      $searchtext, $search_regexp);
 911 sub evaluate_and_validate_params {
 912         our $action = $input_params{'action'};
 913         if (defined $action) {
 914                 if (!validate_action($action)) {
 915                         die_error(400, "Invalid action parameter");
 916                 }
 917         }
 918
 919         # parameters which are pathnames
 920         our $project = $input_params{'project'};
 921         if (defined $project) {
 922                 if (!validate_project($project)) {
 923                         undef $project;
 924                         die_error(404, "No such project");
 925                 }
 926         }
 927
 928         our $file_name = $input_params{'file_name'};
 929         if (defined $file_name) {
 930                 if (!validate_pathname($file_name)) {
 931                         die_error(400, "Invalid file parameter");
 932                 }
 933         }
 934
 935         our $file_parent = $input_params{'file_parent'};
 936         if (defined $file_parent) {
 937                 if (!validate_pathname($file_parent)) {
 938                         die_error(400, "Invalid file parent parameter");
 939                 }
 940         }
 941
 942         # parameters which are refnames
 943         our $hash = $input_params{'hash'};
 944         if (defined $hash) {
 945                 if (!validate_refname($hash)) {
 946                         die_error(400, "Invalid hash parameter");
 947                 }
 948         }
 949
 950         our $hash_parent = $input_params{'hash_parent'};
 951         if (defined $hash_parent) {
 952                 if (!validate_refname($hash_parent)) {
 953                         die_error(400, "Invalid hash parent parameter");
 954                 }
 955         }
 956
 957         our $hash_base = $input_params{'hash_base'};
 958         if (defined $hash_base) {
 959                 if (!validate_refname($hash_base)) {
 960                         die_error(400, "Invalid hash base parameter");
 961                 }
 962         }
 963
 964         our @extra_options = @{$input_params{'extra_options'}};
 965         # @extra_options is always defined, since it can only be (currently) set from
 966         # CGI, and $cgi->param() returns the empty array in array context if the param
 967         # is not set
 968         foreach my $opt (@extra_options) {
 969                 if (not exists $allowed_options{$opt}) {
 970                         die_error(400, "Invalid option parameter");
 971                 }
 972                 if (not grep(/^$action$/, @{$allowed_options{$opt}})) {
 973                         die_error(400, "Invalid option parameter for this action");
 974                 }
 975         }
 976
 977         our $hash_parent_base = $input_params{'hash_parent_base'};
 978         if (defined $hash_parent_base) {
 979                 if (!validate_refname($hash_parent_base)) {
 980                         die_error(400, "Invalid hash parent base parameter");
 981                 }
 982         }
 983
 984         # other parameters
 985         our $page = $input_params{'page'};
 986         if (defined $page) {
 987                 if ($page =~ m/[^0-9]/) {
 988                         die_error(400, "Invalid page parameter");
 989                 }
 990         }
 991
 992         our $searchtype = $input_params{'searchtype'};
 993         if (defined $searchtype) {
 994                 if ($searchtype =~ m/[^a-z]/) {
 995                         die_error(400, "Invalid searchtype parameter");
 996                 }
 997         }
 998
 999         our $search_use_regexp = $input_params{'search_use_regexp'};
1000
1001         our $searchtext = $input_params{'searchtext'};
1002         our $search_regexp;
1003         if (defined $searchtext) {
1004                 if (length($searchtext) < 2) {
1005                         die_error(403, "At least two characters are required for search parameter");
1006                 }
1007                 $search_regexp = $search_use_regexp ? $searchtext : quotemeta $searchtext;
1008         }
1009 }
1010
1011 # path to the current git repository
1012 our $git_dir;
1013 sub evaluate_git_dir {
1014         our $git_dir = "$projectroot/$project" if $project;
1015 }
1016
1017 our (@snapshot_fmts, $git_avatar);
1018 sub configure_gitweb_features {
1019         # list of supported snapshot formats
1020         our @snapshot_fmts = gitweb_get_feature('snapshot');
1021         @snapshot_fmts = filter_snapshot_fmts(@snapshot_fmts);
1022
1023         # check that the avatar feature is set to a known provider name,
1024         # and for each provider check if the dependencies are satisfied.
1025         # if the provider name is invalid or the dependencies are not met,
1026         # reset $git_avatar to the empty string.
1027         our ($git_avatar) = gitweb_get_feature('avatar');
1028         if ($git_avatar eq 'gravatar') {
1029                 $git_avatar = '' unless (eval { require Digest::MD5; 1; });
1030         } elsif ($git_avatar eq 'picon') {
1031                 # no dependencies
1032         } else {
1033                 $git_avatar = '';
1034         }
1035 }
1036
1037 # custom error handler: 'die <message>' is Internal Server Error
1038 sub handle_errors_html {
1039         my $msg = shift; # it is already HTML escaped
1040
1041         # to avoid infinite loop where error occurs in die_error,
1042         # change handler to default handler, disabling handle_errors_html
1043         set_message("Error occured when inside die_error:\n$msg");
1044
1045         # you cannot jump out of die_error when called as error handler;
1046         # the subroutine set via CGI::Carp::set_message is called _after_
1047         # HTTP headers are already written, so it cannot write them itself
1048         die_error(undef, undef, $msg, -error_handler => 1, -no_http_header => 1);
1049 }
1050 set_message(\&handle_errors_html);
1051
1052 # dispatch
1053 sub dispatch {
1054         if (!defined $action) {
1055                 if (defined $hash) {
1056                         $action = git_get_type($hash);
1057                 } elsif (defined $hash_base && defined $file_name) {
1058                         $action = git_get_type("$hash_base:$file_name");
1059                 } elsif (defined $project) {
1060                         $action = 'summary';
1061                 } else {
1062                         $action = 'project_list';
1063                 }
1064         }
1065         if (!defined($actions{$action})) {
1066                 die_error(400, "Unknown action");
1067         }
1068         if ($action !~ m/^(?:opml|project_list|project_index)$/ &&
1069             !$project) {
1070                 die_error(400, "Project needed");
1071         }
1072         $actions{$action}->();
1073 }
1074
1075 sub reset_timer {
1076         our $t0 = [Time::HiRes::gettimeofday()]
1077                 if defined $t0;
1078         our $number_of_git_cmds = 0;
1079 }
1080
1081 our $first_request = 1;
1082 sub run_request {
1083         reset_timer();
1084
1085         evaluate_uri();
1086         if ($first_request) {
1087                 evaluate_gitweb_config();
1088                 evaluate_git_version();
1089         }
1090         if ($per_request_config) {
1091                 if (ref($per_request_config) eq 'CODE') {
1092                         $per_request_config->();
1093                 } elsif (!$first_request) {
1094                         evaluate_gitweb_config();
1095                 }
1096         }
1097         check_loadavg();
1098
1099         # $projectroot and $projects_list might be set in gitweb config file
1100         $projects_list ||= $projectroot;
1101
1102         evaluate_query_params();
1103         evaluate_path_info();
1104         evaluate_and_validate_params();
1105         evaluate_git_dir();
1106
1107         configure_gitweb_features();
1108
1109         dispatch();
1110 }
1111
1112 our $is_last_request = sub { 1 };
1113 our ($pre_dispatch_hook, $post_dispatch_hook, $pre_listen_hook);
1114 our $CGI = 'CGI';
1115 our $cgi;
1116 sub configure_as_fcgi {
1117         require CGI::Fast;
1118         our $CGI = 'CGI::Fast';
1119
1120         my $request_number = 0;
1121         # let each child service 100 requests
1122         our $is_last_request = sub { ++$request_number > 100 };
1123 }
1124 sub evaluate_argv {
1125         my $script_name = $ENV{'SCRIPT_NAME'} || $ENV{'SCRIPT_FILENAME'} || __FILE__;
1126         configure_as_fcgi()
1127                 if $script_name =~ /\.fcgi$/;
1128
1129         return unless (@ARGV);
1130
1131         require Getopt::Long;
1132         Getopt::Long::GetOptions(
1133                 'fastcgi|fcgi|f' => \&configure_as_fcgi,
1134                 'nproc|n=i' => sub {
1135                         my ($arg, $val) = @_;
1136                         return unless eval { require FCGI::ProcManager; 1; };
1137                         my $proc_manager = FCGI::ProcManager->new({
1138                                 n_processes => $val,
1139                         });
1140                         our $pre_listen_hook    = sub { $proc_manager->pm_manage()        };
1141                         our $pre_dispatch_hook  = sub { $proc_manager->pm_pre_dispatch()  };
1142                         our $post_dispatch_hook = sub { $proc_manager->pm_post_dispatch() };
1143                 },
1144         );
1145 }
1146
1147 sub run {
1148         evaluate_argv();
1149
1150         $first_request = 1;
1151         $pre_listen_hook->()
1152                 if $pre_listen_hook;
1153
1154  REQUEST:
1155         while ($cgi = $CGI->new()) {
1156                 $pre_dispatch_hook->()
1157                         if $pre_dispatch_hook;
1158
1159                 run_request();
1160
1161                 $post_dispatch_hook->()
1162                         if $post_dispatch_hook;
1163                 $first_request = 0;
1164
1165                 last REQUEST if ($is_last_request->());
1166         }
1167
1168  DONE_GITWEB:
1169         1;
1170 }
1171
1172 run();
1173
1174 if (defined caller) {
1175         # wrapped in a subroutine processing requests,
1176         # e.g. mod_perl with ModPerl::Registry, or PSGI with Plack::App::WrapCGI
1177         return;
1178 } else {
1179         # pure CGI script, serving single request
1180         exit;
1181 }
1182
1183 ## ======================================================================
1184 ## action links
1185
1186 # possible values of extra options
1187 # -full => 0|1      - use absolute/full URL ($my_uri/$my_url as base)
1188 # -replay => 1      - start from a current view (replay with modifications)
1189 # -path_info => 0|1 - don't use/use path_info URL (if possible)
1190 sub href {
1191         my %params = @_;
1192         # default is to use -absolute url() i.e. $my_uri
1193         my $href = $params{-full} ? $my_url : $my_uri;
1194
1195         $params{'project'} = $project unless exists $params{'project'};
1196
1197         if ($params{-replay}) {
1198                 while (my ($name, $symbol) = each %cgi_param_mapping) {
1199                         if (!exists $params{$name}) {
1200                                 $params{$name} = $input_params{$name};
1201                         }
1202                 }
1203         }
1204
1205         my $use_pathinfo = gitweb_check_feature('pathinfo');
1206         if (defined $params{'project'} &&
1207             (exists $params{-path_info} ? $params{-path_info} : $use_pathinfo)) {
1208                 # try to put as many parameters as possible in PATH_INFO:
1209                 #   - project name
1210                 #   - action
1211                 #   - hash_parent or hash_parent_base:/file_parent
1212                 #   - hash or hash_base:/filename
1213                 #   - the snapshot_format as an appropriate suffix
1214
1215                 # When the script is the root DirectoryIndex for the domain,
1216                 # $href here would be something like http://gitweb.example.com/
1217                 # Thus, we strip any trailing / from $href, to spare us double
1218                 # slashes in the final URL
1219                 $href =~ s,/$,,;
1220
1221                 # Then add the project name, if present
1222                 $href .= "/".esc_url($params{'project'});
1223                 delete $params{'project'};
1224
1225                 # since we destructively absorb parameters, we keep this
1226                 # boolean that remembers if we're handling a snapshot
1227                 my $is_snapshot = $params{'action'} eq 'snapshot';
1228
1229                 # Summary just uses the project path URL, any other action is
1230                 # added to the URL
1231                 if (defined $params{'action'}) {
1232                         $href .= "/".esc_url($params{'action'}) unless $params{'action'} eq 'summary';
1233                         delete $params{'action'};
1234                 }
1235
1236                 # Next, we put hash_parent_base:/file_parent..hash_base:/file_name,
1237                 # stripping nonexistent or useless pieces
1238                 $href .= "/" if ($params{'hash_base'} || $params{'hash_parent_base'}
1239                         || $params{'hash_parent'} || $params{'hash'});
1240                 if (defined $params{'hash_base'}) {
1241                         if (defined $params{'hash_parent_base'}) {
1242                                 $href .= esc_url($params{'hash_parent_base'});
1243                                 # skip the file_parent if it's the same as the file_name
1244                                 if (defined $params{'file_parent'}) {
1245                                         if (defined $params{'file_name'} && $params{'file_parent'} eq $params{'file_name'}) {
1246                                                 delete $params{'file_parent'};
1247                                         } elsif ($params{'file_parent'} !~ /\.\./) {
1248                                                 $href .= ":/".esc_url($params{'file_parent'});
1249                                                 delete $params{'file_parent'};
1250                                         }
1251                                 }
1252                                 $href .= "..";
1253                                 delete $params{'hash_parent'};
1254                                 delete $params{'hash_parent_base'};
1255                         } elsif (defined $params{'hash_parent'}) {
1256                                 $href .= esc_url($params{'hash_parent'}). "..";
1257                                 delete $params{'hash_parent'};
1258                         }
1259
1260                         $href .= esc_url($params{'hash_base'});
1261                         if (defined $params{'file_name'} && $params{'file_name'} !~ /\.\./) {
1262                                 $href .= ":/".esc_url($params{'file_name'});
1263                                 delete $params{'file_name'};
1264                         }
1265                         delete $params{'hash'};
1266                         delete $params{'hash_base'};
1267                 } elsif (defined $params{'hash'}) {
1268                         $href .= esc_url($params{'hash'});
1269                         delete $params{'hash'};
1270                 }
1271
1272                 # If the action was a snapshot, we can absorb the
1273                 # snapshot_format parameter too
1274                 if ($is_snapshot) {
1275                         my $fmt = $params{'snapshot_format'};
1276                         # snapshot_format should always be defined when href()
1277                         # is called, but just in case some code forgets, we
1278                         # fall back to the default
1279                         $fmt ||= $snapshot_fmts[0];
1280                         $href .= $known_snapshot_formats{$fmt}{'suffix'};
1281                         delete $params{'snapshot_format'};
1282                 }
1283         }
1284
1285         # now encode the parameters explicitly
1286         my @result = ();
1287         for (my $i = 0; $i < @cgi_param_mapping; $i += 2) {
1288                 my ($name, $symbol) = ($cgi_param_mapping[$i], $cgi_param_mapping[$i+1]);
1289                 if (defined $params{$name}) {
1290                         if (ref($params{$name}) eq "ARRAY") {
1291                                 foreach my $par (@{$params{$name}}) {
1292                                         push @result, $symbol . "=" . esc_param($par);
1293                                 }
1294                         } else {
1295                                 push @result, $symbol . "=" . esc_param($params{$name});
1296                         }
1297                 }
1298         }
1299         $href .= "?" . join(';', @result) if scalar @result;
1300
1301         return $href;
1302 }
1303
1304
1305 ## ======================================================================
1306 ## validation, quoting/unquoting and escaping
1307
1308 sub validate_action {
1309         my $input = shift || return undef;
1310         return undef unless exists $actions{$input};
1311         return $input;
1312 }
1313
1314 sub validate_project {
1315         my $input = shift || return undef;
1316         if (!validate_pathname($input) ||
1317                 !(-d "$projectroot/$input") ||
1318                 !check_export_ok("$projectroot/$input") ||
1319                 ($strict_export && !project_in_list($input))) {
1320                 return undef;
1321         } else {
1322                 return $input;
1323         }
1324 }
1325
1326 sub validate_pathname {
1327         my $input = shift || return undef;
1328
1329         # no '.' or '..' as elements of path, i.e. no '.' nor '..'
1330         # at the beginning, at the end, and between slashes.
1331         # also this catches doubled slashes
1332         if ($input =~ m!(^|/)(|\.|\.\.)(/|$)!) {
1333                 return undef;
1334         }
1335         # no null characters
1336         if ($input =~ m!\0!) {
1337                 return undef;
1338         }
1339         return $input;
1340 }
1341
1342 sub validate_refname {
1343         my $input = shift || return undef;
1344
1345         # textual hashes are O.K.
1346         if ($input =~ m/^[0-9a-fA-F]{40}$/) {
1347                 return $input;
1348         }
1349         # it must be correct pathname
1350         $input = validate_pathname($input)
1351                 or return undef;
1352         # restrictions on ref name according to git-check-ref-format
1353         if ($input =~ m!(/\.|\.\.|[\000-\040\177 ~^:?*\[]|/$)!) {
1354                 return undef;
1355         }
1356         return $input;
1357 }
1358
1359 # decode sequences of octets in utf8 into Perl's internal form,
1360 # which is utf-8 with utf8 flag set if needed.  gitweb writes out
1361 # in utf-8 thanks to "binmode STDOUT, ':utf8'" at beginning
1362 sub to_utf8 {
1363         my $str = shift;
1364         return undef unless defined $str;
1365         if (utf8::valid($str)) {
1366                 utf8::decode($str);
1367                 return $str;
1368         } else {
1369                 return decode($fallback_encoding, $str, Encode::FB_DEFAULT);
1370         }
1371 }
1372
1373 # quote unsafe chars, but keep the slash, even when it's not
1374 # correct, but quoted slashes look too horrible in bookmarks
1375 sub esc_param {
1376         my $str = shift;
1377         return undef unless defined $str;
1378         $str =~ s/([^A-Za-z0-9\-_.~()\/:@ ]+)/CGI::escape($1)/eg;
1379         $str =~ s/ /\+/g;
1380         return $str;
1381 }
1382
1383 # quote unsafe chars in whole URL, so some characters cannot be quoted
1384 sub esc_url {
1385         my $str = shift;
1386         return undef unless defined $str;
1387         $str =~ s/([^A-Za-z0-9\-_.~();\/;?:@&= ]+)/CGI::escape($1)/eg;
1388         $str =~ s/ /\+/g;
1389         return $str;
1390 }
1391
1392 # replace invalid utf8 character with SUBSTITUTION sequence
1393 sub esc_html {
1394         my $str = shift;
1395         my %opts = @_;
1396
1397         return undef unless defined $str;
1398
1399         $str = to_utf8($str);
1400         $str = $cgi->escapeHTML($str);
1401         if ($opts{'-nbsp'}) {
1402                 $str =~ s/ /&nbsp;/g;
1403         }
1404         $str =~ s|([[:cntrl:]])|(($1 ne "\t") ? quot_cec($1) : $1)|eg;
1405         return $str;
1406 }
1407
1408 # quote control characters and escape filename to HTML
1409 sub esc_path {
1410         my $str = shift;
1411         my %opts = @_;
1412
1413         return undef unless defined $str;
1414
1415         $str = to_utf8($str);
1416         $str = $cgi->escapeHTML($str);
1417         if ($opts{'-nbsp'}) {
1418                 $str =~ s/ /&nbsp;/g;
1419         }
1420         $str =~ s|([[:cntrl:]])|quot_cec($1)|eg;
1421         return $str;
1422 }
1423
1424 # Make control characters "printable", using character escape codes (CEC)
1425 sub quot_cec {
1426         my $cntrl = shift;
1427         my %opts = @_;
1428         my %es = ( # character escape codes, aka escape sequences
1429                 "\t" => '\t',   # tab            (HT)
1430                 "\n" => '\n',   # line feed      (LF)
1431                 "\r" => '\r',   # carrige return (CR)
1432                 "\f" => '\f',   # form feed      (FF)
1433                 "\b" => '\b',   # backspace      (BS)
1434                 "\a" => '\a',   # alarm (bell)   (BEL)
1435                 "\e" => '\e',   # escape         (ESC)
1436                 "\013" => '\v', # vertical tab   (VT)
1437                 "\000" => '\0', # nul character  (NUL)
1438         );
1439         my $chr = ( (exists $es{$cntrl})
1440                     ? $es{$cntrl}
1441                     : sprintf('\%2x', ord($cntrl)) );
1442         if ($opts{-nohtml}) {
1443                 return $chr;
1444         } else {
1445                 return "<span class=\"cntrl\">$chr</span>";
1446         }
1447 }
1448
1449 # Alternatively use unicode control pictures codepoints,
1450 # Unicode "printable representation" (PR)
1451 sub quot_upr {
1452         my $cntrl = shift;
1453         my %opts = @_;
1454
1455         my $chr = sprintf('&#%04d;', 0x2400+ord($cntrl));
1456         if ($opts{-nohtml}) {
1457                 return $chr;
1458         } else {
1459                 return "<span class=\"cntrl\">$chr</span>";
1460         }
1461 }
1462
1463 # git may return quoted and escaped filenames
1464 sub unquote {
1465         my $str = shift;
1466
1467         sub unq {
1468                 my $seq = shift;
1469                 my %es = ( # character escape codes, aka escape sequences
1470                         't' => "\t",   # tab            (HT, TAB)
1471                         'n' => "\n",   # newline        (NL)
1472                         'r' => "\r",   # return         (CR)
1473                         'f' => "\f",   # form feed      (FF)
1474                         'b' => "\b",   # backspace      (BS)
1475                         'a' => "\a",   # alarm (bell)   (BEL)
1476                         'e' => "\e",   # escape         (ESC)
1477                         'v' => "\013", # vertical tab   (VT)
1478                 );
1479
1480                 if ($seq =~ m/^[0-7]{1,3}$/) {
1481                         # octal char sequence
1482                         return chr(oct($seq));
1483                 } elsif (exists $es{$seq}) {
1484                         # C escape sequence, aka character escape code
1485                         return $es{$seq};
1486                 }
1487                 # quoted ordinary character
1488                 return $seq;
1489         }
1490
1491         if ($str =~ m/^"(.*)"$/) {
1492                 # needs unquoting
1493                 $str = $1;
1494                 $str =~ s/\\([^0-7]|[0-7]{1,3})/unq($1)/eg;
1495         }
1496         return $str;
1497 }
1498
1499 # escape tabs (convert tabs to spaces)
1500 sub untabify {
1501         my $line = shift;
1502
1503         while ((my $pos = index($line, "\t")) != -1) {
1504                 if (my $count = (8 - ($pos % 8))) {
1505                         my $spaces = ' ' x $count;
1506                         $line =~ s/\t/$spaces/;
1507                 }
1508         }
1509
1510         return $line;
1511 }
1512
1513 sub project_in_list {
1514         my $project = shift;
1515         my @list = git_get_projects_list();
1516         return @list && scalar(grep { $_->{'path'} eq $project } @list);
1517 }
1518
1519 ## ----------------------------------------------------------------------
1520 ## HTML aware string manipulation
1521
1522 # Try to chop given string on a word boundary between position
1523 # $len and $len+$add_len. If there is no word boundary there,
1524 # chop at $len+$add_len. Do not chop if chopped part plus ellipsis
1525 # (marking chopped part) would be longer than given string.
1526 sub chop_str {
1527         my $str = shift;
1528         my $len = shift;
1529         my $add_len = shift || 10;
1530         my $where = shift || 'right'; # 'left' | 'center' | 'right'
1531
1532         # Make sure perl knows it is utf8 encoded so we don't
1533         # cut in the middle of a utf8 multibyte char.
1534         $str = to_utf8($str);
1535
1536         # allow only $len chars, but don't cut a word if it would fit in $add_len
1537         # if it doesn't fit, cut it if it's still longer than the dots we would add
1538         # remove chopped character entities entirely
1539
1540         # when chopping in the middle, distribute $len into left and right part
1541         # return early if chopping wouldn't make string shorter
1542         if ($where eq 'center') {
1543                 return $str if ($len + 5 >= length($str)); # filler is length 5
1544                 $len = int($len/2);
1545         } else {
1546                 return $str if ($len + 4 >= length($str)); # filler is length 4
1547         }
1548
1549         # regexps: ending and beginning with word part up to $add_len
1550         my $endre = qr/.{$len}\w{0,$add_len}/;
1551         my $begre = qr/\w{0,$add_len}.{$len}/;
1552
1553         if ($where eq 'left') {
1554                 $str =~ m/^(.*?)($begre)$/;
1555                 my ($lead, $body) = ($1, $2);
1556                 if (length($lead) > 4) {
1557                         $lead = " ...";
1558                 }
1559                 return "$lead$body";
1560
1561         } elsif ($where eq 'center') {
1562                 $str =~ m/^($endre)(.*)$/;
1563                 my ($left, $str)  = ($1, $2);
1564                 $str =~ m/^(.*?)($begre)$/;
1565                 my ($mid, $right) = ($1, $2);
1566                 if (length($mid) > 5) {
1567                         $mid = " ... ";
1568                 }
1569                 return "$left$mid$right";
1570
1571         } else {
1572                 $str =~ m/^($endre)(.*)$/;
1573                 my $body = $1;
1574                 my $tail = $2;
1575                 if (length($tail) > 4) {
1576                         $tail = "... ";
1577                 }
1578                 return "$body$tail";
1579         }
1580 }
1581
1582 # takes the same arguments as chop_str, but also wraps a <span> around the
1583 # result with a title attribute if it does get chopped. Additionally, the
1584 # string is HTML-escaped.
1585 sub chop_and_escape_str {
1586         my ($str) = @_;
1587
1588         my $chopped = chop_str(@_);
1589         if ($chopped eq $str) {
1590                 return esc_html($chopped);
1591         } else {
1592                 $str =~ s/[[:cntrl:]]/?/g;
1593                 return $cgi->span({-title=>$str}, esc_html($chopped));
1594         }
1595 }
1596
1597 ## ----------------------------------------------------------------------
1598 ## functions returning short strings
1599
1600 # CSS class for given age value (in seconds)
1601 sub age_class {
1602         my $age = shift;
1603
1604         if (!defined $age) {
1605                 return "noage";
1606         } elsif ($age < 60*60*2) {
1607                 return "age0";
1608         } elsif ($age < 60*60*24*2) {
1609                 return "age1";
1610         } else {
1611                 return "age2";
1612         }
1613 }
1614
1615 # convert age in seconds to "nn units ago" string
1616 sub age_string {
1617         my $age = shift;
1618         my $age_str;
1619
1620         if ($age > 60*60*24*365*2) {
1621                 $age_str = (int $age/60/60/24/365);
1622                 $age_str .= " years ago";
1623         } elsif ($age > 60*60*24*(365/12)*2) {
1624                 $age_str = int $age/60/60/24/(365/12);
1625                 $age_str .= " months ago";
1626         } elsif ($age > 60*60*24*7*2) {
1627                 $age_str = int $age/60/60/24/7;
1628                 $age_str .= " weeks ago";
1629         } elsif ($age > 60*60*24*2) {
1630                 $age_str = int $age/60/60/24;
1631                 $age_str .= " days ago";
1632         } elsif ($age > 60*60*2) {
1633                 $age_str = int $age/60/60;
1634                 $age_str .= " hours ago";
1635         } elsif ($age > 60*2) {
1636                 $age_str = int $age/60;
1637                 $age_str .= " min ago";
1638         } elsif ($age > 2) {
1639                 $age_str = int $age;
1640                 $age_str .= " sec ago";
1641         } else {
1642                 $age_str .= " right now";
1643         }
1644         return $age_str;
1645 }
1646
1647 use constant {
1648         S_IFINVALID => 0030000,
1649         S_IFGITLINK => 0160000,
1650 };
1651
1652 # submodule/subproject, a commit object reference
1653 sub S_ISGITLINK {
1654         my $mode = shift;
1655
1656         return (($mode & S_IFMT) == S_IFGITLINK)
1657 }
1658
1659 # convert file mode in octal to symbolic file mode string
1660 sub mode_str {
1661         my $mode = oct shift;
1662
1663         if (S_ISGITLINK($mode)) {
1664                 return 'm---------';
1665         } elsif (S_ISDIR($mode & S_IFMT)) {
1666                 return 'drwxr-xr-x';
1667         } elsif (S_ISLNK($mode)) {
1668                 return 'lrwxrwxrwx';
1669         } elsif (S_ISREG($mode)) {
1670                 # git cares only about the executable bit
1671                 if ($mode & S_IXUSR) {
1672                         return '-rwxr-xr-x';
1673                 } else {
1674                         return '-rw-r--r--';
1675                 };
1676         } else {
1677                 return '----------';
1678         }
1679 }
1680
1681 # convert file mode in octal to file type string
1682 sub file_type {
1683         my $mode = shift;
1684
1685         if ($mode !~ m/^[0-7]+$/) {
1686                 return $mode;
1687         } else {
1688                 $mode = oct $mode;
1689         }
1690
1691         if (S_ISGITLINK($mode)) {
1692                 return "submodule";
1693         } elsif (S_ISDIR($mode & S_IFMT)) {
1694                 return "directory";
1695         } elsif (S_ISLNK($mode)) {
1696                 return "symlink";
1697         } elsif (S_ISREG($mode)) {
1698                 return "file";
1699         } else {
1700                 return "unknown";
1701         }
1702 }
1703
1704 # convert file mode in octal to file type description string
1705 sub file_type_long {
1706         my $mode = shift;
1707
1708         if ($mode !~ m/^[0-7]+$/) {
1709                 return $mode;
1710         } else {
1711                 $mode = oct $mode;
1712         }
1713
1714         if (S_ISGITLINK($mode)) {
1715                 return "submodule";
1716         } elsif (S_ISDIR($mode & S_IFMT)) {
1717                 return "directory";
1718         } elsif (S_ISLNK($mode)) {
1719                 return "symlink";
1720         } elsif (S_ISREG($mode)) {
1721                 if ($mode & S_IXUSR) {
1722                         return "executable";
1723                 } else {
1724                         return "file";
1725                 };
1726         } else {
1727                 return "unknown";
1728         }
1729 }
1730
1731
1732 ## ----------------------------------------------------------------------
1733 ## functions returning short HTML fragments, or transforming HTML fragments
1734 ## which don't belong to other sections
1735
1736 # format line of commit message.
1737 sub format_log_line_html {
1738         my $line = shift;
1739
1740         $line = esc_html($line, -nbsp=>1);
1741         $line =~ s{\b([0-9a-fA-F]{8,40})\b}{
1742                 $cgi->a({-href => href(action=>"object", hash=>$1),
1743                                         -class => "text"}, $1);
1744         }eg;
1745
1746         return $line;
1747 }
1748
1749 # format marker of refs pointing to given object
1750
1751 # the destination action is chosen based on object type and current context:
1752 # - for annotated tags, we choose the tag view unless it's the current view
1753 #   already, in which case we go to shortlog view
1754 # - for other refs, we keep the current view if we're in history, shortlog or
1755 #   log view, and select shortlog otherwise
1756 sub format_ref_marker {
1757         my ($refs, $id) = @_;
1758         my $markers = '';
1759
1760         if (defined $refs->{$id}) {
1761                 foreach my $ref (@{$refs->{$id}}) {
1762                         # this code exploits the fact that non-lightweight tags are the
1763                         # only indirect objects, and that they are the only objects for which
1764                         # we want to use tag instead of shortlog as action
1765                         my ($type, $name) = qw();
1766                         my $indirect = ($ref =~ s/\^\{\}$//);
1767                         # e.g. tags/v2.6.11 or heads/next
1768                         if ($ref =~ m!^(.*?)s?/(.*)$!) {
1769                                 $type = $1;
1770                                 $name = $2;
1771                         } else {
1772                                 $type = "ref";
1773                                 $name = $ref;
1774                         }
1775
1776                         my $class = $type;
1777                         $class .= " indirect" if $indirect;
1778
1779                         my $dest_action = "shortlog";
1780
1781                         if ($indirect) {
1782                                 $dest_action = "tag" unless $action eq "tag";
1783                         } elsif ($action =~ /^(history|(short)?log)$/) {
1784                                 $dest_action = $action;
1785                         }
1786
1787                         my $dest = "";
1788                         $dest .= "refs/" unless $ref =~ m!^refs/!;
1789                         $dest .= $ref;
1790
1791                         my $link = $cgi->a({
1792                                 -href => href(
1793                                         action=>$dest_action,
1794                                         hash=>$dest
1795                                 )}, $name);
1796
1797                         $markers .= " <span class=\"$class\" title=\"$ref\">" .
1798                                 $link . "</span>";
1799                 }
1800         }
1801
1802         if ($markers) {
1803                 return ' <span class="refs">'. $markers . '</span>';
1804         } else {
1805                 return "";
1806         }
1807 }
1808
1809 # format, perhaps shortened and with markers, title line
1810 sub format_subject_html {
1811         my ($long, $short, $href, $extra) = @_;
1812         $extra = '' unless defined($extra);
1813
1814         if (length($short) < length($long)) {
1815                 $long =~ s/[[:cntrl:]]/?/g;
1816                 return $cgi->a({-href => $href, -class => "list subject",
1817                                 -title => to_utf8($long)},
1818                        esc_html($short)) . $extra;
1819         } else {
1820                 return $cgi->a({-href => $href, -class => "list subject"},
1821                        esc_html($long)) . $extra;
1822         }
1823 }
1824
1825 # Rather than recomputing the url for an email multiple times, we cache it
1826 # after the first hit. This gives a visible benefit in views where the avatar
1827 # for the same email is used repeatedly (e.g. shortlog).
1828 # The cache is shared by all avatar engines (currently gravatar only), which
1829 # are free to use it as preferred. Since only one avatar engine is used for any
1830 # given page, there's no risk for cache conflicts.
1831 our %avatar_cache = ();
1832
1833 # Compute the picon url for a given email, by using the picon search service over at
1834 # http://www.cs.indiana.edu/picons/search.html
1835 sub picon_url {
1836         my $email = lc shift;
1837         if (!$avatar_cache{$email}) {
1838                 my ($user, $domain) = split('@', $email);
1839                 $avatar_cache{$email} =
1840                         "http://www.cs.indiana.edu/cgi-pub/kinzler/piconsearch.cgi/" .
1841                         "$domain/$user/" .
1842                         "users+domains+unknown/up/single";
1843         }
1844         return $avatar_cache{$email};
1845 }
1846
1847 # Compute the gravatar url for a given email, if it's not in the cache already.
1848 # Gravatar stores only the part of the URL before the size, since that's the
1849 # one computationally more expensive. This also allows reuse of the cache for
1850 # different sizes (for this particular engine).
1851 sub gravatar_url {
1852         my $email = lc shift;
1853         my $size = shift;
1854         $avatar_cache{$email} ||=
1855                 "http://www.gravatar.com/avatar/" .
1856                         Digest::MD5::md5_hex($email) . "?s=";
1857         return $avatar_cache{$email} . $size;
1858 }
1859
1860 # Insert an avatar for the given $email at the given $size if the feature
1861 # is enabled.
1862 sub git_get_avatar {
1863         my ($email, %opts) = @_;
1864         my $pre_white  = ($opts{-pad_before} ? "&nbsp;" : "");
1865         my $post_white = ($opts{-pad_after}  ? "&nbsp;" : "");
1866         $opts{-size} ||= 'default';
1867         my $size = $avatar_size{$opts{-size}} || $avatar_size{'default'};
1868         my $url = "";
1869         if ($git_avatar eq 'gravatar') {
1870                 $url = gravatar_url($email, $size);
1871         } elsif ($git_avatar eq 'picon') {
1872                 $url = picon_url($email);
1873         }
1874         # Other providers can be added by extending the if chain, defining $url
1875         # as needed. If no variant puts something in $url, we assume avatars
1876         # are completely disabled/unavailable.
1877         if ($url) {
1878                 return $pre_white .
1879                        "<img width=\"$size\" " .
1880                             "class=\"avatar\" " .
1881                             "src=\"$url\" " .
1882                             "alt=\"\" " .
1883                        "/>" . $post_white;
1884         } else {
1885                 return "";
1886         }
1887 }
1888
1889 sub format_search_author {
1890         my ($author, $searchtype, $displaytext) = @_;
1891         my $have_search = gitweb_check_feature('search');
1892
1893         if ($have_search) {
1894                 my $performed = "";
1895                 if ($searchtype eq 'author') {
1896                         $performed = "authored";
1897                 } elsif ($searchtype eq 'committer') {
1898                         $performed = "committed";
1899                 }
1900
1901                 return $cgi->a({-href => href(action=>"search", hash=>$hash,
1902                                 searchtext=>$author,
1903                                 searchtype=>$searchtype), class=>"list",
1904                                 title=>"Search for commits $performed by $author"},
1905                                 $displaytext);
1906
1907         } else {
1908                 return $displaytext;
1909         }
1910 }
1911
1912 # format the author name of the given commit with the given tag
1913 # the author name is chopped and escaped according to the other
1914 # optional parameters (see chop_str).
1915 sub format_author_html {
1916         my $tag = shift;
1917         my $co = shift;
1918         my $author = chop_and_escape_str($co->{'author_name'}, @_);
1919         return "<$tag class=\"author\">" .
1920                format_search_author($co->{'author_name'}, "author",
1921                        git_get_avatar($co->{'author_email'}, -pad_after => 1) .
1922                        $author) .
1923                "</$tag>";
1924 }
1925
1926 # format git diff header line, i.e. "diff --(git|combined|cc) ..."
1927 sub format_git_diff_header_line {
1928         my $line = shift;
1929         my $diffinfo = shift;
1930         my ($from, $to) = @_;
1931
1932         if ($diffinfo->{'nparents'}) {
1933                 # combined diff
1934                 $line =~ s!^(diff (.*?) )"?.*$!$1!;
1935                 if ($to->{'href'}) {
1936                         $line .= $cgi->a({-href => $to->{'href'}, -class => "path"},
1937                                          esc_path($to->{'file'}));
1938                 } else { # file was deleted (no href)
1939                         $line .= esc_path($to->{'file'});
1940                 }
1941         } else {
1942                 # "ordinary" diff
1943                 $line =~ s!^(diff (.*?) )"?a/.*$!$1!;
1944                 if ($from->{'href'}) {
1945                         $line .= $cgi->a({-href => $from->{'href'}, -class => "path"},
1946                                          'a/' . esc_path($from->{'file'}));
1947                 } else { # file was added (no href)
1948                         $line .= 'a/' . esc_path($from->{'file'});
1949                 }
1950                 $line .= ' ';
1951                 if ($to->{'href'}) {
1952                         $line .= $cgi->a({-href => $to->{'href'}, -class => "path"},
1953                                          'b/' . esc_path($to->{'file'}));
1954                 } else { # file was deleted
1955                         $line .= 'b/' . esc_path($to->{'file'});
1956                 }
1957         }
1958
1959         return "<div class=\"diff header\">$line</div>\n";
1960 }
1961
1962 # format extended diff header line, before patch itself
1963 sub format_extended_diff_header_line {
1964         my $line = shift;
1965         my $diffinfo = shift;
1966         my ($from, $to) = @_;
1967
1968         # match <path>
1969         if ($line =~ s!^((copy|rename) from ).*$!$1! && $from->{'href'}) {
1970                 $line .= $cgi->a({-href=>$from->{'href'}, -class=>"path"},
1971                                        esc_path($from->{'file'}));
1972         }
1973         if ($line =~ s!^((copy|rename) to ).*$!$1! && $to->{'href'}) {
1974                 $line .= $cgi->a({-href=>$to->{'href'}, -class=>"path"},
1975                                  esc_path($to->{'file'}));
1976         }
1977         # match single <mode>
1978         if ($line =~ m/\s(\d{6})$/) {
1979                 $line .= '<span class="info"> (' .
1980                          file_type_long($1) .
1981                          ')</span>';
1982         }
1983         # match <hash>
1984         if ($line =~ m/^index [0-9a-fA-F]{40},[0-9a-fA-F]{40}/) {
1985                 # can match only for combined diff
1986                 $line = 'index ';
1987                 for (my $i = 0; $i < $diffinfo->{'nparents'}; $i++) {
1988                         if ($from->{'href'}[$i]) {
1989                                 $line .= $cgi->a({-href=>$from->{'href'}[$i],
1990                                                   -class=>"hash"},
1991                                                  substr($diffinfo->{'from_id'}[$i],0,7));
1992                         } else {
1993                                 $line .= '0' x 7;
1994                         }
1995                         # separator
1996                         $line .= ',' if ($i < $diffinfo->{'nparents'} - 1);
1997                 }
1998                 $line .= '..';
1999                 if ($to->{'href'}) {
2000                         $line .= $cgi->a({-href=>$to->{'href'}, -class=>"hash"},
2001                                          substr($diffinfo->{'to_id'},0,7));
2002                 } else {
2003                         $line .= '0' x 7;
2004                 }
2005
2006         } elsif ($line =~ m/^index [0-9a-fA-F]{40}..[0-9a-fA-F]{40}/) {
2007                 # can match only for ordinary diff
2008                 my ($from_link, $to_link);
2009                 if ($from->{'href'}) {
2010                         $from_link = $cgi->a({-href=>$from->{'href'}, -class=>"hash"},
2011                                              substr($diffinfo->{'from_id'},0,7));
2012                 } else {
2013                         $from_link = '0' x 7;
2014                 }
2015                 if ($to->{'href'}) {
2016                         $to_link = $cgi->a({-href=>$to->{'href'}, -class=>"hash"},
2017                                            substr($diffinfo->{'to_id'},0,7));
2018                 } else {
2019                         $to_link = '0' x 7;
2020                 }
2021                 my ($from_id, $to_id) = ($diffinfo->{'from_id'}, $diffinfo->{'to_id'});
2022                 $line =~ s!$from_id\.\.$to_id!$from_link..$to_link!;
2023         }
2024
2025         return $line . "<br/>\n";
2026 }
2027
2028 # format from-file/to-file diff header
2029 sub format_diff_from_to_header {
2030         my ($from_line, $to_line, $diffinfo, $from, $to, @parents) = @_;
2031         my $line;
2032         my $result = '';
2033
2034         $line = $from_line;
2035         #assert($line =~ m/^---/) if DEBUG;
2036         # no extra formatting for "^--- /dev/null"
2037         if (! $diffinfo->{'nparents'}) {
2038                 # ordinary (single parent) diff
2039                 if ($line =~ m!^--- "?a/!) {
2040                         if ($from->{'href'}) {
2041                                 $line = '--- a/' .
2042                                         $cgi->a({-href=>$from->{'href'}, -class=>"path"},
2043                                                 esc_path($from->{'file'}));
2044                         } else {
2045                                 $line = '--- a/' .
2046                                         esc_path($from->{'file'});
2047                         }
2048                 }
2049                 $result .= qq!<div class="diff from_file">$line</div>\n!;
2050
2051         } else {
2052                 # combined diff (merge commit)
2053                 for (my $i = 0; $i < $diffinfo->{'nparents'}; $i++) {
2054                         if ($from->{'href'}[$i]) {
2055                                 $line = '--- ' .
2056                                         $cgi->a({-href=>href(action=>"blobdiff",
2057                                                              hash_parent=>$diffinfo->{'from_id'}[$i],
2058                                                              hash_parent_base=>$parents[$i],
2059                                                              file_parent=>$from->{'file'}[$i],
2060                                                              hash=>$diffinfo->{'to_id'},
2061                                                              hash_base=>$hash,
2062                                                              file_name=>$to->{'file'}),
2063                                                  -class=>"path",
2064                                                  -title=>"diff" . ($i+1)},
2065                                                 $i+1) .
2066                                         '/' .
2067                                         $cgi->a({-href=>$from->{'href'}[$i], -class=>"path"},
2068                                                 esc_path($from->{'file'}[$i]));
2069                         } else {
2070                                 $line = '--- /dev/null';
2071                         }
2072                         $result .= qq!<div class="diff from_file">$line</div>\n!;
2073                 }
2074         }
2075
2076         $line = $to_line;
2077         #assert($line =~ m/^\+\+\+/) if DEBUG;
2078         # no extra formatting for "^+++ /dev/null"
2079         if ($line =~ m!^\+\+\+ "?b/!) {
2080                 if ($to->{'href'}) {
2081                         $line = '+++ b/' .
2082                                 $cgi->a({-href=>$to->{'href'}, -class=>"path"},
2083                                         esc_path($to->{'file'}));
2084                 } else {
2085                         $line = '+++ b/' .
2086                                 esc_path($to->{'file'});
2087                 }
2088         }
2089         $result .= qq!<div class="diff to_file">$line</div>\n!;
2090
2091         return $result;
2092 }
2093
2094 # create note for patch simplified by combined diff
2095 sub format_diff_cc_simplified {
2096         my ($diffinfo, @parents) = @_;
2097         my $result = '';
2098
2099         $result .= "<div class=\"diff header\">" .
2100                    "diff --cc ";
2101         if (!is_deleted($diffinfo)) {
2102                 $result .= $cgi->a({-href => href(action=>"blob",
2103                                                   hash_base=>$hash,
2104                                                   hash=>$diffinfo->{'to_id'},
2105                                                   file_name=>$diffinfo->{'to_file'}),
2106                                     -class => "path"},
2107                                    esc_path($diffinfo->{'to_file'}));
2108         } else {
2109                 $result .= esc_path($diffinfo->{'to_file'});
2110         }
2111         $result .= "</div>\n" . # class="diff header"
2112                    "<div class=\"diff nodifferences\">" .
2113                    "Simple merge" .
2114                    "</div>\n"; # class="diff nodifferences"
2115
2116         return $result;
2117 }
2118
2119 # format patch (diff) line (not to be used for diff headers)
2120 sub format_diff_line {
2121         my $line = shift;
2122         my ($from, $to) = @_;
2123         my $diff_class = "";
2124
2125         chomp $line;
2126
2127         if ($from && $to && ref($from->{'href'}) eq "ARRAY") {
2128                 # combined diff
2129                 my $prefix = substr($line, 0, scalar @{$from->{'href'}});
2130                 if ($line =~ m/^\@{3}/) {
2131                         $diff_class = " chunk_header";
2132                 } elsif ($line =~ m/^\\/) {
2133                         $diff_class = " incomplete";
2134                 } elsif ($prefix =~ tr/+/+/) {
2135                         $diff_class = " add";
2136                 } elsif ($prefix =~ tr/-/-/) {
2137                         $diff_class = " rem";
2138                 }
2139         } else {
2140                 # assume ordinary diff
2141                 my $char = substr($line, 0, 1);
2142                 if ($char eq '+') {
2143                         $diff_class = " add";
2144                 } elsif ($char eq '-') {
2145                         $diff_class = " rem";
2146                 } elsif ($char eq '@') {
2147                         $diff_class = " chunk_header";
2148                 } elsif ($char eq "\\") {
2149                         $diff_class = " incomplete";
2150                 }
2151         }
2152         $line = untabify($line);
2153         if ($from && $to && $line =~ m/^\@{2} /) {
2154                 my ($from_text, $from_start, $from_lines, $to_text, $to_start, $to_lines, $section) =
2155                         $line =~ m/^\@{2} (-(\d+)(?:,(\d+))?) (\+(\d+)(?:,(\d+))?) \@{2}(.*)$/;
2156
2157                 $from_lines = 0 unless defined $from_lines;
2158                 $to_lines   = 0 unless defined $to_lines;
2159
2160                 if ($from->{'href'}) {
2161                         $from_text = $cgi->a({-href=>"$from->{'href'}#l$from_start",
2162                                              -class=>"list"}, $from_text);
2163                 }
2164                 if ($to->{'href'}) {
2165                         $to_text   = $cgi->a({-href=>"$to->{'href'}#l$to_start",
2166                                              -class=>"list"}, $to_text);
2167                 }
2168                 $line = "<span class=\"chunk_info\">@@ $from_text $to_text @@</span>" .
2169                         "<span class=\"section\">" . esc_html($section, -nbsp=>1) . "</span>";
2170                 return "<div class=\"diff$diff_class\">$line</div>\n";
2171         } elsif ($from && $to && $line =~ m/^\@{3}/) {
2172                 my ($prefix, $ranges, $section) = $line =~ m/^(\@+) (.*?) \@+(.*)$/;
2173                 my (@from_text, @from_start, @from_nlines, $to_text, $to_start, $to_nlines);
2174
2175                 @from_text = split(' ', $ranges);
2176                 for (my $i = 0; $i < @from_text; ++$i) {
2177                         ($from_start[$i], $from_nlines[$i]) =
2178                                 (split(',', substr($from_text[$i], 1)), 0);
2179                 }
2180
2181                 $to_text   = pop @from_text;
2182                 $to_start  = pop @from_start;
2183                 $to_nlines = pop @from_nlines;
2184
2185                 $line = "<span class=\"chunk_info\">$prefix ";
2186                 for (my $i = 0; $i < @from_text; ++$i) {
2187                         if ($from->{'href'}[$i]) {
2188                                 $line .= $cgi->a({-href=>"$from->{'href'}[$i]#l$from_start[$i]",
2189                                                   -class=>"list"}, $from_text[$i]);
2190                         } else {
2191                                 $line .= $from_text[$i];
2192                         }
2193                         $line .= " ";
2194                 }
2195                 if ($to->{'href'}) {
2196                         $line .= $cgi->a({-href=>"$to->{'href'}#l$to_start",
2197                                           -class=>"list"}, $to_text);
2198                 } else {
2199                         $line .= $to_text;
2200                 }
2201                 $line .= " $prefix</span>" .
2202                          "<span class=\"section\">" . esc_html($section, -nbsp=>1) . "</span>";
2203                 return "<div class=\"diff$diff_class\">$line</div>\n";
2204         }
2205         return "<div class=\"diff$diff_class\">" . esc_html($line, -nbsp=>1) . "</div>\n";
2206 }
2207
2208 # Generates undef or something like "_snapshot_" or "snapshot (_tbz2_ _zip_)",
2209 # linked.  Pass the hash of the tree/commit to snapshot.
2210 sub format_snapshot_links {
2211         my ($hash) = @_;
2212         my $num_fmts = @snapshot_fmts;
2213         if ($num_fmts > 1) {
2214                 # A parenthesized list of links bearing format names.
2215                 # e.g. "snapshot (_tar.gz_ _zip_)"
2216                 return "snapshot (" . join(' ', map
2217                         $cgi->a({
2218                                 -href => href(
2219                                         action=>"snapshot",
2220                                         hash=>$hash,
2221                                         snapshot_format=>$_
2222                                 )
2223                         }, $known_snapshot_formats{$_}{'display'})
2224                 , @snapshot_fmts) . ")";
2225         } elsif ($num_fmts == 1) {
2226                 # A single "snapshot" link whose tooltip bears the format name.
2227                 # i.e. "_snapshot_"
2228                 my ($fmt) = @snapshot_fmts;
2229                 return
2230                         $cgi->a({
2231                                 -href => href(
2232                                         action=>"snapshot",
2233                                         hash=>$hash,
2234                                         snapshot_format=>$fmt
2235                                 ),
2236                                 -title => "in format: $known_snapshot_formats{$fmt}{'display'}"
2237                         }, "snapshot");
2238         } else { # $num_fmts == 0
2239                 return undef;
2240         }
2241 }
2242
2243 ## ......................................................................
2244 ## functions returning values to be passed, perhaps after some
2245 ## transformation, to other functions; e.g. returning arguments to href()
2246
2247 # returns hash to be passed to href to generate gitweb URL
2248 # in -title key it returns description of link
2249 sub get_feed_info {
2250         my $format = shift || 'Atom';
2251         my %res = (action => lc($format));
2252
2253         # feed links are possible only for project views
2254         return unless (defined $project);
2255         # some views should link to OPML, or to generic project feed,
2256         # or don't have specific feed yet (so they should use generic)
2257         return if ($action =~ /^(?:tags|heads|forks|tag|search)$/x);
2258
2259         my $branch;
2260         # branches refs uses 'refs/heads/' prefix (fullname) to differentiate
2261         # from tag links; this also makes possible to detect branch links
2262         if ((defined $hash_base && $hash_base =~ m!^refs/heads/(.*)$!) ||
2263             (defined $hash      && $hash      =~ m!^refs/heads/(.*)$!)) {
2264                 $branch = $1;
2265         }
2266         # find log type for feed description (title)
2267         my $type = 'log';
2268         if (defined $file_name) {
2269                 $type  = "history of $file_name";
2270                 $type .= "/" if ($action eq 'tree');
2271                 $type .= " on '$branch'" if (defined $branch);
2272         } else {
2273                 $type = "log of $branch" if (defined $branch);
2274         }
2275
2276         $res{-title} = $type;
2277         $res{'hash'} = (defined $branch ? "refs/heads/$branch" : undef);
2278         $res{'file_name'} = $file_name;
2279
2280         return %res;
2281 }
2282
2283 ## ----------------------------------------------------------------------
2284 ## git utility subroutines, invoking git commands
2285
2286 # returns path to the core git executable and the --git-dir parameter as list
2287 sub git_cmd {
2288         $number_of_git_cmds++;
2289         return $GIT, '--git-dir='.$git_dir;
2290 }
2291
2292 # quote the given arguments for passing them to the shell
2293 # quote_command("command", "arg 1", "arg with ' and ! characters")
2294 # => "'command' 'arg 1' 'arg with '\'' and '\!' characters'"
2295 # Try to avoid using this function wherever possible.
2296 sub quote_command {
2297         return join(' ',
2298                 map { my $a = $_; $a =~ s/(['!])/'\\$1'/g; "'$a'" } @_ );
2299 }
2300
2301 # get HEAD ref of given project as hash
2302 sub git_get_head_hash {
2303         return git_get_full_hash(shift, 'HEAD');
2304 }
2305
2306 sub git_get_full_hash {
2307         return git_get_hash(@_);
2308 }
2309
2310 sub git_get_short_hash {
2311         return git_get_hash(@_, '--short=7');
2312 }
2313
2314 sub git_get_hash {
2315         my ($project, $hash, @options) = @_;
2316         my $o_git_dir = $git_dir;
2317         my $retval = undef;
2318         $git_dir = "$projectroot/$project";
2319         if (open my $fd, '-|', git_cmd(), 'rev-parse',
2320             '--verify', '-q', @options, $hash) {
2321                 $retval = <$fd>;
2322                 chomp $retval if defined $retval;
2323                 close $fd;
2324         }
2325         if (defined $o_git_dir) {
2326                 $git_dir = $o_git_dir;
2327         }
2328         return $retval;
2329 }
2330
2331 # get type of given object
2332 sub git_get_type {
2333         my $hash = shift;
2334
2335         open my $fd, "-|", git_cmd(), "cat-file", '-t', $hash or return;
2336         my $type = <$fd>;
2337         close $fd or return;
2338         chomp $type;
2339         return $type;
2340 }
2341
2342 # repository configuration
2343 our $config_file = '';
2344 our %config;
2345
2346 # store multiple values for single key as anonymous array reference
2347 # single values stored directly in the hash, not as [ <value> ]
2348 sub hash_set_multi {
2349         my ($hash, $key, $value) = @_;
2350
2351         if (!exists $hash->{$key}) {
2352                 $hash->{$key} = $value;
2353         } elsif (!ref $hash->{$key}) {
2354                 $hash->{$key} = [ $hash->{$key}, $value ];
2355         } else {
2356                 push @{$hash->{$key}}, $value;
2357         }
2358 }
2359
2360 # return hash of git project configuration
2361 # optionally limited to some section, e.g. 'gitweb'
2362 sub git_parse_project_config {
2363         my $section_regexp = shift;
2364         my %config;
2365
2366         local $/ = "\0";
2367
2368         open my $fh, "-|", git_cmd(), "config", '-z', '-l',
2369                 or return;
2370
2371         while (my $keyval = <$fh>) {
2372                 chomp $keyval;
2373                 my ($key, $value) = split(/\n/, $keyval, 2);
2374
2375                 hash_set_multi(\%config, $key, $value)
2376                         if (!defined $section_regexp || $key =~ /^(?:$section_regexp)\./o);
2377         }
2378         close $fh;
2379
2380         return %config;
2381 }
2382
2383 # convert config value to boolean: 'true' or 'false'
2384 # no value, number > 0, 'true' and 'yes' values are true
2385 # rest of values are treated as false (never as error)
2386 sub config_to_bool {
2387         my $val = shift;
2388
2389         return 1 if !defined $val;             # section.key
2390
2391         # strip leading and trailing whitespace
2392         $val =~ s/^\s+//;
2393         $val =~ s/\s+$//;
2394
2395         return (($val =~ /^\d+$/ && $val) ||   # section.key = 1
2396                 ($val =~ /^(?:true|yes)$/i));  # section.key = true
2397 }
2398
2399 # convert config value to simple decimal number
2400 # an optional value suffix of 'k', 'm', or 'g' will cause the value
2401 # to be multiplied by 1024, 1048576, or 1073741824
2402 sub config_to_int {
2403         my $val = shift;
2404
2405         # strip leading and trailing whitespace
2406         $val =~ s/^\s+//;
2407         $val =~ s/\s+$//;
2408
2409         if (my ($num, $unit) = ($val =~ /^([0-9]*)([kmg])$/i)) {
2410                 $unit = lc($unit);
2411                 # unknown unit is treated as 1
2412                 return $num * ($unit eq 'g' ? 1073741824 :
2413                                $unit eq 'm' ?    1048576 :
2414                                $unit eq 'k' ?       1024 : 1);
2415         }
2416         return $val;
2417 }
2418
2419 # convert config value to array reference, if needed
2420 sub config_to_multi {
2421         my $val = shift;
2422
2423         return ref($val) ? $val : (defined($val) ? [ $val ] : []);
2424 }
2425
2426 sub git_get_project_config {
2427         my ($key, $type) = @_;
2428
2429         return unless defined $git_dir;
2430
2431         # key sanity check
2432         return unless ($key);
2433         $key =~ s/^gitweb\.//;
2434         return if ($key =~ m/\W/);
2435
2436         # type sanity check
2437         if (defined $type) {
2438                 $type =~ s/^--//;
2439                 $type = undef
2440                         unless ($type eq 'bool' || $type eq 'int');
2441         }
2442
2443         # get config
2444         if (!defined $config_file ||
2445             $config_file ne "$git_dir/config") {
2446                 %config = git_parse_project_config('gitweb');
2447                 $config_file = "$git_dir/config";
2448         }
2449
2450         # check if config variable (key) exists
2451         return unless exists $config{"gitweb.$key"};
2452
2453         # ensure given type
2454         if (!defined $type) {
2455                 return $config{"gitweb.$key"};
2456         } elsif ($type eq 'bool') {
2457                 # backward compatibility: 'git config --bool' returns true/false
2458                 return config_to_bool($config{"gitweb.$key"}) ? 'true' : 'false';
2459         } elsif ($type eq 'int') {
2460                 return config_to_int($config{"gitweb.$key"});
2461         }
2462         return $config{"gitweb.$key"};
2463 }
2464
2465 # get hash of given path at given ref
2466 sub git_get_hash_by_path {
2467         my $base = shift;
2468         my $path = shift || return undef;
2469         my $type = shift;
2470
2471         $path =~ s,/+$,,;
2472
2473         open my $fd, "-|", git_cmd(), "ls-tree", $base, "--", $path
2474                 or die_error(500, "Open git-ls-tree failed");
2475         my $line = <$fd>;
2476         close $fd or return undef;
2477
2478         if (!defined $line) {
2479                 # there is no tree or hash given by $path at $base
2480                 return undef;
2481         }
2482
2483         #'100644 blob 0fa3f3a66fb6a137f6ec2c19351ed4d807070ffa  panic.c'
2484         $line =~ m/^([0-9]+) (.+) ([0-9a-fA-F]{40})\t/;
2485         if (defined $type && $type ne $2) {
2486                 # type doesn't match
2487                 return undef;
2488         }
2489         return $3;
2490 }
2491
2492 # get path of entry with given hash at given tree-ish (ref)
2493 # used to get 'from' filename for combined diff (merge commit) for renames
2494 sub git_get_path_by_hash {
2495         my $base = shift || return;
2496         my $hash = shift || return;
2497
2498         local $/ = "\0";
2499
2500         open my $fd, "-|", git_cmd(), "ls-tree", '-r', '-t', '-z', $base
2501                 or return undef;
2502         while (my $line = <$fd>) {
2503                 chomp $line;
2504
2505                 #'040000 tree 595596a6a9117ddba9fe379b6b012b558bac8423  gitweb'
2506                 #'100644 blob e02e90f0429be0d2a69b76571101f20b8f75530f  gitweb/README'
2507                 if ($line =~ m/(?:[0-9]+) (?:.+) $hash\t(.+)$/) {
2508                         close $fd;
2509                         return $1;
2510                 }
2511         }
2512         close $fd;
2513         return undef;
2514 }
2515
2516 ## ......................................................................
2517 ## git utility functions, directly accessing git repository
2518
2519 sub git_get_project_description {
2520         my $path = shift;
2521
2522         $git_dir = "$projectroot/$path";
2523         open my $fd, '<', "$git_dir/description"
2524                 or return git_get_project_config('description');
2525         my $descr = <$fd>;
2526         close $fd;
2527         if (defined $descr) {
2528                 chomp $descr;
2529         }
2530         return $descr;
2531 }
2532
2533 sub git_get_project_ctags {
2534         my $path = shift;
2535         my $ctags = {};
2536
2537         $git_dir = "$projectroot/$path";
2538         opendir my $dh, "$git_dir/ctags"
2539                 or return $ctags;
2540         foreach (grep { -f $_ } map { "$git_dir/ctags/$_" } readdir($dh)) {
2541                 open my $ct, '<', $_ or next;
2542                 my $val = <$ct>;
2543                 chomp $val;
2544                 close $ct;
2545                 my $ctag = $_; $ctag =~ s#.*/##;
2546                 $ctags->{$ctag} = $val;
2547         }
2548         closedir $dh;
2549         $ctags;
2550 }
2551
2552 sub git_populate_project_tagcloud {
2553         my $ctags = shift;
2554
2555         # First, merge different-cased tags; tags vote on casing
2556         my %ctags_lc;
2557         foreach (keys %$ctags) {
2558                 $ctags_lc{lc $_}->{count} += $ctags->{$_};
2559                 if (not $ctags_lc{lc $_}->{topcount}
2560                     or $ctags_lc{lc $_}->{topcount} < $ctags->{$_}) {
2561                         $ctags_lc{lc $_}->{topcount} = $ctags->{$_};
2562                         $ctags_lc{lc $_}->{topname} = $_;
2563                 }
2564         }
2565
2566         my $cloud;
2567         if (eval { require HTML::TagCloud; 1; }) {
2568                 $cloud = HTML::TagCloud->new;
2569                 foreach (sort keys %ctags_lc) {
2570                         # Pad the title with spaces so that the cloud looks
2571                         # less crammed.
2572                         my $title = $ctags_lc{$_}->{topname};
2573                         $title =~ s/ /&nbsp;/g;
2574                         $title =~ s/^/&nbsp;/g;
2575                         $title =~ s/$/&nbsp;/g;
2576                         $cloud->add($title, $home_link."?by_tag=".$_, $ctags_lc{$_}->{count});
2577                 }
2578         } else {
2579                 $cloud = \%ctags_lc;
2580         }
2581         $cloud;
2582 }
2583
2584 sub git_show_project_tagcloud {
2585         my ($cloud, $count) = @_;
2586         print STDERR ref($cloud)."..\n";
2587         if (ref $cloud eq 'HTML::TagCloud') {
2588                 return $cloud->html_and_css($count);
2589         } else {
2590                 my @tags = sort { $cloud->{$a}->{count} <=> $cloud->{$b}->{count} } keys %$cloud;
2591                 return '<p align="center">' . join (', ', map {
2592                         "<a href=\"$home_link?by_tag=$_\">$cloud->{$_}->{topname}</a>"
2593                 } splice(@tags, 0, $count)) . '</p>';
2594         }
2595 }
2596
2597 sub git_get_project_url_list {
2598         my $path = shift;
2599
2600         $git_dir = "$projectroot/$path";
2601         open my $fd, '<', "$git_dir/cloneurl"
2602                 or return wantarray ?
2603                 @{ config_to_multi(git_get_project_config('url')) } :
2604                    config_to_multi(git_get_project_config('url'));
2605         my @git_project_url_list = map { chomp; $_ } <$fd>;
2606         close $fd;
2607
2608         return wantarray ? @git_project_url_list : \@git_project_url_list;
2609 }
2610
2611 sub git_get_projects_list {
2612         my ($filter) = @_;
2613         my @list;
2614
2615         $filter ||= '';
2616         $filter =~ s/\.git$//;
2617
2618         my $check_forks = gitweb_check_feature('forks');
2619
2620         if (-d $projects_list) {
2621                 # search in directory
2622                 my $dir = $projects_list . ($filter ? "/$filter" : '');
2623                 # remove the trailing "/"
2624                 $dir =~ s!/+$!!;
2625                 my $pfxlen = length("$dir");
2626                 my $pfxdepth = ($dir =~ tr!/!!);
2627
2628                 File::Find::find({
2629                         follow_fast => 1, # follow symbolic links
2630                         follow_skip => 2, # ignore duplicates
2631                         dangling_symlinks => 0, # ignore dangling symlinks, silently
2632                         wanted => sub {
2633                                 # global variables
2634                                 our $project_maxdepth;
2635                                 our $projectroot;
2636                                 # skip project-list toplevel, if we get it.
2637                                 return if (m!^[/.]$!);
2638                                 # only directories can be git repositories
2639                                 return unless (-d $_);
2640                                 # don't traverse too deep (Find is super slow on os x)
2641                                 if (($File::Find::name =~ tr!/!!) - $pfxdepth > $project_maxdepth) {
2642                                         $File::Find::prune = 1;
2643                                         return;
2644                                 }
2645
2646                                 my $subdir = substr($File::Find::name, $pfxlen + 1);
2647                                 # we check related file in $projectroot
2648                                 my $path = ($filter ? "$filter/" : '') . $subdir;
2649                                 if (check_export_ok("$projectroot/$path")) {
2650                                         push @list, { path => $path };
2651                                         $File::Find::prune = 1;
2652                                 }
2653                         },
2654                 }, "$dir");
2655
2656         } elsif (-f $projects_list) {
2657                 # read from file(url-encoded):
2658                 # 'git%2Fgit.git Linus+Torvalds'
2659                 # 'libs%2Fklibc%2Fklibc.git H.+Peter+Anvin'
2660                 # 'linux%2Fhotplug%2Fudev.git Greg+Kroah-Hartman'
2661                 my %paths;
2662                 open my $fd, '<', $projects_list or return;
2663         PROJECT:
2664                 while (my $line = <$fd>) {
2665                         chomp $line;
2666                         my ($path, $owner) = split ' ', $line;
2667                         $path = unescape($path);
2668                         $owner = unescape($owner);
2669                         if (!defined $path) {
2670                                 next;
2671                         }
2672                         if ($filter ne '') {
2673                                 # looking for forks;
2674                                 my $pfx = substr($path, 0, length($filter));
2675                                 if ($pfx ne $filter) {
2676                                         next PROJECT;
2677                                 }
2678                                 my $sfx = substr($path, length($filter));
2679                                 if ($sfx !~ /^\/.*\.git$/) {
2680                                         next PROJECT;
2681                                 }
2682                         } elsif ($check_forks) {
2683                         PATH:
2684                                 foreach my $filter (keys %paths) {
2685                                         # looking for forks;
2686                                         my $pfx = substr($path, 0, length($filter));
2687                                         if ($pfx ne $filter) {
2688                                                 next PATH;
2689                                         }
2690                                         my $sfx = substr($path, length($filter));
2691                                         if ($sfx !~ /^\/.*\.git$/) {
2692                                                 next PATH;
2693                                         }
2694                                         # is a fork, don't include it in
2695                                         # the list
2696                                         next PROJECT;
2697                                 }
2698                         }
2699                         if (check_export_ok("$projectroot/$path")) {
2700                                 my $pr = {
2701                                         path => $path,
2702                                         owner => to_utf8($owner),
2703                                 };
2704                                 push @list, $pr;
2705                                 (my $forks_path = $path) =~ s/\.git$//;
2706                                 $paths{$forks_path}++;
2707                         }
2708                 }
2709                 close $fd;
2710         }
2711         return @list;
2712 }
2713
2714 our $gitweb_project_owner = undef;
2715 sub git_get_project_list_from_file {
2716
2717         return if (defined $gitweb_project_owner);
2718
2719         $gitweb_project_owner = {};
2720         # read from file (url-encoded):
2721         # 'git%2Fgit.git Linus+Torvalds'
2722         # 'libs%2Fklibc%2Fklibc.git H.+Peter+Anvin'
2723         # 'linux%2Fhotplug%2Fudev.git Greg+Kroah-Hartman'
2724         if (-f $projects_list) {
2725                 open(my $fd, '<', $projects_list);
2726                 while (my $line = <$fd>) {
2727                         chomp $line;
2728                         my ($pr, $ow) = split ' ', $line;
2729                         $pr = unescape($pr);
2730                         $ow = unescape($ow);
2731                         $gitweb_project_owner->{$pr} = to_utf8($ow);
2732                 }
2733                 close $fd;
2734         }
2735 }
2736
2737 sub git_get_project_owner {
2738         my $project = shift;
2739         my $owner;
2740
2741         return undef unless $project;
2742         $git_dir = "$projectroot/$project";
2743
2744         if (!defined $gitweb_project_owner) {
2745                 git_get_project_list_from_file();
2746         }
2747
2748         if (exists $gitweb_project_owner->{$project}) {
2749                 $owner = $gitweb_project_owner->{$project};
2750         }
2751         if (!defined $owner){
2752                 $owner = git_get_project_config('owner');
2753         }
2754         if (!defined $owner) {
2755                 $owner = get_file_owner("$git_dir");
2756         }
2757
2758         return $owner;
2759 }
2760
2761 sub git_get_last_activity {
2762         my ($path) = @_;
2763         my $fd;
2764
2765         $git_dir = "$projectroot/$path";
2766         open($fd, "-|", git_cmd(), 'for-each-ref',
2767              '--format=%(committer)',
2768              '--sort=-committerdate',
2769              '--count=1',
2770              'refs/heads') or return;
2771         my $most_recent = <$fd>;
2772         close $fd or return;
2773         if (defined $most_recent &&
2774             $most_recent =~ / (\d+) [-+][01]\d\d\d$/) {
2775                 my $timestamp = $1;
2776                 my $age = time - $timestamp;
2777                 return ($age, age_string($age));
2778         }
2779         return (undef, undef);
2780 }
2781
2782 sub git_get_references {
2783         my $type = shift || "";
2784         my %refs;
2785         # 5dc01c595e6c6ec9ccda4f6f69c131c0dd945f8c refs/tags/v2.6.11
2786         # c39ae07f393806ccf406ef966e9a15afc43cc36a refs/tags/v2.6.11^{}
2787         open my $fd, "-|", git_cmd(), "show-ref", "--dereference",
2788                 ($type ? ("--", "refs/$type") : ()) # use -- <pattern> if $type
2789                 or return;
2790
2791         while (my $line = <$fd>) {
2792                 chomp $line;
2793                 if ($line =~ m!^([0-9a-fA-F]{40})\srefs/($type.*)$!) {
2794                         if (defined $refs{$1}) {
2795                                 push @{$refs{$1}}, $2;
2796                         } else {
2797                                 $refs{$1} = [ $2 ];
2798                         }
2799                 }
2800         }
2801         close $fd or return;
2802         return \%refs;
2803 }
2804
2805 sub git_get_rev_name_tags {
2806         my $hash = shift || return undef;
2807
2808         open my $fd, "-|", git_cmd(), "name-rev", "--tags", $hash
2809                 or return;
2810         my $name_rev = <$fd>;
2811         close $fd;
2812
2813         if ($name_rev =~ m|^$hash tags/(.*)$|) {
2814                 return $1;
2815         } else {
2816                 # catches also '$hash undefined' output
2817                 return undef;
2818         }
2819 }
2820
2821 ## ----------------------------------------------------------------------
2822 ## parse to hash functions
2823
2824 sub parse_date {
2825         my $epoch = shift;
2826         my $tz = shift || "-0000";
2827
2828         my %date;
2829         my @months = ("Jan", "Feb", "Mar", "Apr", "May", "Jun", "Jul", "Aug", "Sep", "Oct", "Nov", "Dec");
2830         my @days = ("Sun", "Mon", "Tue", "Wed", "Thu", "Fri", "Sat");
2831         my ($sec, $min, $hour, $mday, $mon, $year, $wday, $yday) = gmtime($epoch);
2832         $date{'hour'} = $hour;
2833         $date{'minute'} = $min;
2834         $date{'mday'} = $mday;
2835         $date{'day'} = $days[$wday];
2836         $date{'month'} = $months[$mon];
2837         $date{'rfc2822'}   = sprintf "%s, %d %s %4d %02d:%02d:%02d +0000",
2838                              $days[$wday], $mday, $months[$mon], 1900+$year, $hour ,$min, $sec;
2839         $date{'mday-time'} = sprintf "%d %s %02d:%02d",
2840                              $mday, $months[$mon], $hour ,$min;
2841         $date{'iso-8601'}  = sprintf "%04d-%02d-%02dT%02d:%02d:%02dZ",
2842                              1900+$year, 1+$mon, $mday, $hour ,$min, $sec;
2843
2844         $tz =~ m/^([+\-][0-9][0-9])([0-9][0-9])$/;
2845         my $local = $epoch + ((int $1 + ($2/60)) * 3600);
2846         ($sec, $min, $hour, $mday, $mon, $year, $wday, $yday) = gmtime($local);
2847         $date{'hour_local'} = $hour;
2848         $date{'minute_local'} = $min;
2849         $date{'tz_local'} = $tz;
2850         $date{'iso-tz'} = sprintf("%04d-%02d-%02d %02d:%02d:%02d %s",
2851                                   1900+$year, $mon+1, $mday,
2852                                   $hour, $min, $sec, $tz);
2853         return %date;
2854 }
2855
2856 sub parse_tag {
2857         my $tag_id = shift;
2858         my %tag;
2859         my @comment;
2860
2861         open my $fd, "-|", git_cmd(), "cat-file", "tag", $tag_id or return;
2862         $tag{'id'} = $tag_id;
2863         while (my $line = <$fd>) {
2864                 chomp $line;
2865                 if ($line =~ m/^object ([0-9a-fA-F]{40})$/) {
2866                         $tag{'object'} = $1;
2867                 } elsif ($line =~ m/^type (.+)$/) {
2868                         $tag{'type'} = $1;
2869                 } elsif ($line =~ m/^tag (.+)$/) {
2870                         $tag{'name'} = $1;
2871                 } elsif ($line =~ m/^tagger (.*) ([0-9]+) (.*)$/) {
2872                         $tag{'author'} = $1;
2873                         $tag{'author_epoch'} = $2;
2874                         $tag{'author_tz'} = $3;
2875                         if ($tag{'author'} =~ m/^([^<]+) <([^>]*)>/) {
2876                                 $tag{'author_name'}  = $1;
2877                                 $tag{'author_email'} = $2;
2878                         } else {
2879                                 $tag{'author_name'} = $tag{'author'};
2880                         }
2881                 } elsif ($line =~ m/--BEGIN/) {
2882                         push @comment, $line;
2883                         last;
2884                 } elsif ($line eq "") {
2885                         last;
2886                 }
2887         }
2888         push @comment, <$fd>;
2889         $tag{'comment'} = \@comment;
2890         close $fd or return;
2891         if (!defined $tag{'name'}) {
2892                 return
2893         };
2894         return %tag
2895 }
2896
2897 sub parse_commit_text {
2898         my ($commit_text, $withparents) = @_;
2899         my @commit_lines = split '\n', $commit_text;
2900         my %co;
2901
2902         pop @commit_lines; # Remove '\0'
2903
2904         if (! @commit_lines) {
2905                 return;
2906         }
2907
2908         my $header = shift @commit_lines;
2909         if ($header !~ m/^[0-9a-fA-F]{40}/) {
2910                 return;
2911         }
2912         ($co{'id'}, my @parents) = split ' ', $header;
2913         while (my $line = shift @commit_lines) {
2914                 last if $line eq "\n";
2915                 if ($line =~ m/^tree ([0-9a-fA-F]{40})$/) {
2916                         $co{'tree'} = $1;
2917                 } elsif ((!defined $withparents) && ($line =~ m/^parent ([0-9a-fA-F]{40})$/)) {
2918                         push @parents, $1;
2919                 } elsif ($line =~ m/^author (.*) ([0-9]+) (.*)$/) {
2920                         $co{'author'} = to_utf8($1);
2921                         $co{'author_epoch'} = $2;
2922                         $co{'author_tz'} = $3;
2923                         if ($co{'author'} =~ m/^([^<]+) <([^>]*)>/) {
2924                                 $co{'author_name'}  = $1;
2925                                 $co{'author_email'} = $2;
2926                         } else {
2927                                 $co{'author_name'} = $co{'author'};
2928                         }
2929                 } elsif ($line =~ m/^committer (.*) ([0-9]+) (.*)$/) {
2930                         $co{'committer'} = to_utf8($1);
2931                         $co{'committer_epoch'} = $2;
2932                         $co{'committer_tz'} = $3;
2933                         if ($co{'committer'} =~ m/^([^<]+) <([^>]*)>/) {
2934                                 $co{'committer_name'}  = $1;
2935                                 $co{'committer_email'} = $2;
2936                         } else {
2937                                 $co{'committer_name'} = $co{'committer'};
2938                         }
2939                 }
2940         }
2941         if (!defined $co{'tree'}) {
2942                 return;
2943         };
2944         $co{'parents'} = \@parents;
2945         $co{'parent'} = $parents[0];
2946
2947         foreach my $title (@commit_lines) {
2948                 $title =~ s/^    //;
2949                 if ($title ne "") {
2950                         $co{'title'} = chop_str($title, 80, 5);
2951                         # remove leading stuff of merges to make the interesting part visible
2952                         if (length($title) > 50) {
2953                                 $title =~ s/^Automatic //;
2954                                 $title =~ s/^merge (of|with) /Merge ... /i;
2955                                 if (length($title) > 50) {
2956                                         $title =~ s/(http|rsync):\/\///;
2957                                 }
2958                                 if (length($title) > 50) {
2959                                         $title =~ s/(master|www|rsync)\.//;
2960                                 }
2961                                 if (length($title) > 50) {
2962                                         $title =~ s/kernel.org:?//;
2963                                 }
2964                                 if (length($title) > 50) {
2965                                         $title =~ s/\/pub\/scm//;
2966                                 }
2967                         }
2968                         $co{'title_short'} = chop_str($title, 50, 5);
2969                         last;
2970                 }
2971         }
2972         if (! defined $co{'title'} || $co{'title'} eq "") {
2973                 $co{'title'} = $co{'title_short'} = '(no commit message)';
2974         }
2975         # remove added spaces
2976         foreach my $line (@commit_lines) {
2977                 $line =~ s/^    //;
2978         }
2979         $co{'comment'} = \@commit_lines;
2980
2981         my $age = time - $co{'committer_epoch'};
2982         $co{'age'} = $age;
2983         $co{'age_string'} = age_string($age);
2984         my ($sec, $min, $hour, $mday, $mon, $year, $wday, $yday) = gmtime($co{'committer_epoch'});
2985         if ($age > 60*60*24*7*2) {
2986                 $co{'age_string_date'} = sprintf "%4i-%02u-%02i", 1900 + $year, $mon+1, $mday;
2987                 $co{'age_string_age'} = $co{'age_string'};
2988         } else {
2989                 $co{'age_string_date'} = $co{'age_string'};
2990                 $co{'age_string_age'} = sprintf "%4i-%02u-%02i", 1900 + $year, $mon+1, $mday;
2991         }
2992         return %co;
2993 }
2994
2995 sub parse_commit {
2996         my ($commit_id) = @_;
2997         my %co;
2998
2999         local $/ = "\0";
3000
3001         open my $fd, "-|", git_cmd(), "rev-list",
3002                 "--parents",
3003                 "--header",
3004                 "--max-count=1",
3005                 $commit_id,
3006                 "--",
3007                 or die_error(500, "Open git-rev-list failed");
3008         %co = parse_commit_text(<$fd>, 1);
3009         close $fd;
3010
3011         return %co;
3012 }
3013
3014 sub parse_commits {
3015         my ($commit_id, $maxcount, $skip, $filename, @args) = @_;
3016         my @cos;
3017
3018         $maxcount ||= 1;
3019         $skip ||= 0;
3020
3021         local $/ = "\0";
3022
3023         open my $fd, "-|", git_cmd(), "rev-list",
3024                 "--header",
3025                 @args,
3026                 ("--max-count=" . $maxcount),
3027                 ("--skip=" . $skip),
3028                 @extra_options,
3029                 $commit_id,
3030                 "--",
3031                 ($filename ? ($filename) : ())
3032                 or die_error(500, "Open git-rev-list failed");
3033         while (my $line = <$fd>) {
3034                 my %co = parse_commit_text($line);
3035                 push @cos, \%co;
3036         }
3037         close $fd;
3038
3039         return wantarray ? @cos : \@cos;
3040 }
3041
3042 # parse line of git-diff-tree "raw" output
3043 sub parse_difftree_raw_line {
3044         my $line = shift;
3045         my %res;
3046
3047         # ':100644 100644 03b218260e99b78c6df0ed378e59ed9205ccc96d 3b93d5e7cc7f7dd4ebed13a5cc1a4ad976fc94d8 M   ls-files.c'
3048         # ':100644 100644 7f9281985086971d3877aca27704f2aaf9c448ce bc190ebc71bbd923f2b728e505408f5e54bd073a M   rev-tree.c'
3049         if ($line =~ m/^:([0-7]{6}) ([0-7]{6}) ([0-9a-fA-F]{40}) ([0-9a-fA-F]{40}) (.)([0-9]{0,3})\t(.*)$/) {
3050                 $res{'from_mode'} = $1;
3051                 $res{'to_mode'} = $2;
3052                 $res{'from_id'} = $3;
3053                 $res{'to_id'} = $4;
3054                 $res{'status'} = $5;
3055                 $res{'similarity'} = $6;
3056                 if ($res{'status'} eq 'R' || $res{'status'} eq 'C') { # renamed or copied
3057                         ($res{'from_file'}, $res{'to_file'}) = map { unquote($_) } split("\t", $7);
3058                 } else {
3059                         $res{'from_file'} = $res{'to_file'} = $res{'file'} = unquote($7);
3060                 }
3061         }
3062         # '::100755 100755 100755 60e79ca1b01bc8b057abe17ddab484699a7f5fdb 94067cc5f73388f33722d52ae02f44692bc07490 94067cc5f73388f33722d52ae02f44692bc07490 MR git-gui/git-gui.sh'
3063         # combined diff (for merge commit)
3064         elsif ($line =~ s/^(::+)((?:[0-7]{6} )+)((?:[0-9a-fA-F]{40} )+)([a-zA-Z]+)\t(.*)$//) {
3065                 $res{'nparents'}  = length($1);
3066                 $res{'from_mode'} = [ split(' ', $2) ];
3067                 $res{'to_mode'} = pop @{$res{'from_mode'}};
3068                 $res{'from_id'} = [ split(' ', $3) ];
3069                 $res{'to_id'} = pop @{$res{'from_id'}};
3070                 $res{'status'} = [ split('', $4) ];
3071                 $res{'to_file'} = unquote($5);
3072         }
3073         # 'c512b523472485aef4fff9e57b229d9d243c967f'
3074         elsif ($line =~ m/^([0-9a-fA-F]{40})$/) {
3075                 $res{'commit'} = $1;
3076         }
3077
3078         return wantarray ? %res : \%res;
3079 }
3080
3081 # wrapper: return parsed line of git-diff-tree "raw" output
3082 # (the argument might be raw line, or parsed info)
3083 sub parsed_difftree_line {
3084         my $line_or_ref = shift;
3085
3086         if (ref($line_or_ref) eq "HASH") {
3087                 # pre-parsed (or generated by hand)
3088                 return $line_or_ref;
3089         } else {
3090                 return parse_difftree_raw_line($line_or_ref);
3091         }
3092 }
3093
3094 # parse line of git-ls-tree output
3095 sub parse_ls_tree_line {
3096         my $line = shift;
3097         my %opts = @_;
3098         my %res;
3099
3100         if ($opts{'-l'}) {
3101                 #'100644 blob 0fa3f3a66fb6a137f6ec2c19351ed4d807070ffa   16717  panic.c'
3102                 $line =~ m/^([0-9]+) (.+) ([0-9a-fA-F]{40}) +(-|[0-9]+)\t(.+)$/s;
3103
3104                 $res{'mode'} = $1;
3105                 $res{'type'} = $2;
3106                 $res{'hash'} = $3;
3107                 $res{'size'} = $4;
3108                 if ($opts{'-z'}) {
3109                         $res{'name'} = $5;
3110                 } else {
3111                         $res{'name'} = unquote($5);
3112                 }
3113         } else {
3114                 #'100644 blob 0fa3f3a66fb6a137f6ec2c19351ed4d807070ffa  panic.c'
3115                 $line =~ m/^([0-9]+) (.+) ([0-9a-fA-F]{40})\t(.+)$/s;
3116
3117                 $res{'mode'} = $1;
3118                 $res{'type'} = $2;
3119                 $res{'hash'} = $3;
3120                 if ($opts{'-z'}) {
3121                         $res{'name'} = $4;
3122                 } else {
3123                         $res{'name'} = unquote($4);
3124                 }
3125         }
3126
3127         return wantarray ? %res : \%res;
3128 }
3129
3130 # generates _two_ hashes, references to which are passed as 2 and 3 argument
3131 sub parse_from_to_diffinfo {
3132         my ($diffinfo, $from, $to, @parents) = @_;
3133
3134         if ($diffinfo->{'nparents'}) {
3135                 # combined diff
3136                 $from->{'file'} = [];
3137                 $from->{'href'} = [];
3138                 fill_from_file_info($diffinfo, @parents)
3139                         unless exists $diffinfo->{'from_file'};
3140                 for (my $i = 0; $i < $diffinfo->{'nparents'}; $i++) {
3141                         $from->{'file'}[$i] =
3142                                 defined $diffinfo->{'from_file'}[$i] ?
3143                                         $diffinfo->{'from_file'}[$i] :
3144                                         $diffinfo->{'to_file'};
3145                         if ($diffinfo->{'status'}[$i] ne "A") { # not new (added) file
3146                                 $from->{'href'}[$i] = href(action=>"blob",
3147                                                            hash_base=>$parents[$i],
3148                                                            hash=>$diffinfo->{'from_id'}[$i],
3149                                                            file_name=>$from->{'file'}[$i]);
3150                         } else {
3151                                 $from->{'href'}[$i] = undef;
3152                         }
3153                 }
3154         } else {
3155                 # ordinary (not combined) diff
3156                 $from->{'file'} = $diffinfo->{'from_file'};
3157                 if ($diffinfo->{'status'} ne "A") { # not new (added) file
3158                         $from->{'href'} = href(action=>"blob", hash_base=>$hash_parent,
3159                                                hash=>$diffinfo->{'from_id'},
3160                                                file_name=>$from->{'file'});
3161                 } else {
3162                         delete $from->{'href'};
3163                 }
3164         }
3165
3166         $to->{'file'} = $diffinfo->{'to_file'};
3167         if (!is_deleted($diffinfo)) { # file exists in result
3168                 $to->{'href'} = href(action=>"blob", hash_base=>$hash,
3169                                      hash=>$diffinfo->{'to_id'},
3170                                      file_name=>$to->{'file'});
3171         } else {
3172                 delete $to->{'href'};
3173         }
3174 }
3175
3176 ## ......................................................................
3177 ## parse to array of hashes functions
3178
3179 sub git_get_heads_list {
3180         my $limit = shift;
3181         my @headslist;
3182
3183         open my $fd, '-|', git_cmd(), 'for-each-ref',
3184                 ($limit ? '--count='.($limit+1) : ()), '--sort=-committerdate',
3185                 '--format=%(objectname) %(refname) %(subject)%00%(committer)',
3186                 'refs/heads'
3187                 or return;
3188         while (my $line = <$fd>) {
3189                 my %ref_item;
3190
3191                 chomp $line;
3192                 my ($refinfo, $committerinfo) = split(/\0/, $line);
3193                 my ($hash, $name, $title) = split(' ', $refinfo, 3);
3194                 my ($committer, $epoch, $tz) =
3195                         ($committerinfo =~ /^(.*) ([0-9]+) (.*)$/);
3196                 $ref_item{'fullname'}  = $name;
3197                 $name =~ s!^refs/heads/!!;
3198
3199                 $ref_item{'name'}  = $name;
3200                 $ref_item{'id'}    = $hash;
3201                 $ref_item{'title'} = $title || '(no commit message)';
3202                 $ref_item{'epoch'} = $epoch;
3203                 if ($epoch) {
3204                         $ref_item{'age'} = age_string(time - $ref_item{'epoch'});
3205                 } else {
3206                         $ref_item{'age'} = "unknown";
3207                 }
3208
3209                 push @headslist, \%ref_item;
3210         }
3211         close $fd;
3212
3213         return wantarray ? @headslist : \@headslist;
3214 }
3215
3216 sub git_get_tags_list {
3217         my $limit = shift;
3218         my @tagslist;
3219
3220         open my $fd, '-|', git_cmd(), 'for-each-ref',
3221                 ($limit ? '--count='.($limit+1) : ()), '--sort=-creatordate',
3222                 '--format=%(objectname) %(objecttype) %(refname) '.
3223                 '%(*objectname) %(*objecttype) %(subject)%00%(creator)',
3224                 'refs/tags'
3225                 or return;
3226         while (my $line = <$fd>) {
3227                 my %ref_item;
3228
3229                 chomp $line;
3230                 my ($refinfo, $creatorinfo) = split(/\0/, $line);
3231                 my ($id, $type, $name, $refid, $reftype, $title) = split(' ', $refinfo, 6);
3232                 my ($creator, $epoch, $tz) =
3233                         ($creatorinfo =~ /^(.*) ([0-9]+) (.*)$/);
3234                 $ref_item{'fullname'} = $name;
3235                 $name =~ s!^refs/tags/!!;
3236
3237                 $ref_item{'type'} = $type;
3238                 $ref_item{'id'} = $id;
3239                 $ref_item{'name'} = $name;
3240                 if ($type eq "tag") {
3241                         $ref_item{'subject'} = $title;
3242                         $ref_item{'reftype'} = $reftype;
3243                         $ref_item{'refid'}   = $refid;
3244                 } else {
3245                         $ref_item{'reftype'} = $type;
3246                         $ref_item{'refid'}   = $id;
3247                 }
3248
3249                 if ($type eq "tag" || $type eq "commit") {
3250                         $ref_item{'epoch'} = $epoch;
3251                         if ($epoch) {
3252                                 $ref_item{'age'} = age_string(time - $ref_item{'epoch'});
3253                         } else {
3254                                 $ref_item{'age'} = "unknown";
3255                         }
3256                 }
3257
3258                 push @tagslist, \%ref_item;
3259         }
3260         close $fd;
3261
3262         return wantarray ? @tagslist : \@tagslist;
3263 }
3264
3265 ## ----------------------------------------------------------------------
3266 ## filesystem-related functions
3267
3268 sub get_file_owner {
3269         my $path = shift;
3270
3271         my ($dev, $ino, $mode, $nlink, $st_uid, $st_gid, $rdev, $size) = stat($path);
3272         my ($name, $passwd, $uid, $gid, $quota, $comment, $gcos, $dir, $shell) = getpwuid($st_uid);
3273         if (!defined $gcos) {
3274                 return undef;
3275         }
3276         my $owner = $gcos;
3277         $owner =~ s/[,;].*$//;
3278         return to_utf8($owner);
3279 }
3280
3281 # assume that file exists
3282 sub insert_file {
3283         my $filename = shift;
3284
3285         open my $fd, '<', $filename;
3286         print map { to_utf8($_) } <$fd>;
3287         close $fd;
3288 }
3289
3290 ## ......................................................................
3291 ## mimetype related functions
3292
3293 sub mimetype_guess_file {
3294         my $filename = shift;
3295         my $mimemap = shift;
3296         -r $mimemap or return undef;
3297
3298         my %mimemap;
3299         open(my $mh, '<', $mimemap) or return undef;
3300         while (<$mh>) {
3301                 next if m/^#/; # skip comments
3302                 my ($mimetype, $exts) = split(/\t+/);
3303                 if (defined $exts) {
3304                         my @exts = split(/\s+/, $exts);
3305                         foreach my $ext (@exts) {
3306                                 $mimemap{$ext} = $mimetype;
3307                         }
3308                 }
3309         }
3310         close($mh);
3311
3312         $filename =~ /\.([^.]*)$/;
3313         return $mimemap{$1};
3314 }
3315
3316 sub mimetype_guess {
3317         my $filename = shift;
3318         my $mime;
3319         $filename =~ /\./ or return undef;
3320
3321         if ($mimetypes_file) {
3322                 my $file = $mimetypes_file;
3323                 if ($file !~ m!^/!) { # if it is relative path
3324                         # it is relative to project
3325                         $file = "$projectroot/$project/$file";
3326                 }
3327                 $mime = mimetype_guess_file($filename, $file);
3328         }
3329         $mime ||= mimetype_guess_file($filename, '/etc/mime.types');
3330         return $mime;
3331 }
3332
3333 sub blob_mimetype {
3334         my $fd = shift;
3335         my $filename = shift;
3336
3337         if ($filename) {
3338                 my $mime = mimetype_guess($filename);
3339                 $mime and return $mime;
3340         }
3341
3342         # just in case
3343         return $default_blob_plain_mimetype unless $fd;
3344
3345         if (-T $fd) {
3346                 return 'text/plain';
3347         } elsif (! $filename) {
3348                 return 'application/octet-stream';
3349         } elsif ($filename =~ m/\.png$/i) {
3350                 return 'image/png';
3351         } elsif ($filename =~ m/\.gif$/i) {
3352                 return 'image/gif';
3353         } elsif ($filename =~ m/\.jpe?g$/i) {
3354                 return 'image/jpeg';
3355         } else {
3356                 return 'application/octet-stream';
3357         }
3358 }
3359
3360 sub blob_contenttype {
3361         my ($fd, $file_name, $type) = @_;
3362
3363         $type ||= blob_mimetype($fd, $file_name);
3364         if ($type eq 'text/plain' && defined $default_text_plain_charset) {
3365                 $type .= "; charset=$default_text_plain_charset";
3366         }
3367
3368         return $type;
3369 }
3370
3371 # guess file syntax for syntax highlighting; return undef if no highlighting
3372 # the name of syntax can (in the future) depend on syntax highlighter used
3373 sub guess_file_syntax {
3374         my ($highlight, $mimetype, $file_name) = @_;
3375         return undef unless ($highlight && defined $file_name);
3376         my $basename = basename($file_name, '.in');
3377         return $highlight_basename{$basename}
3378                 if exists $highlight_basename{$basename};
3379
3380         $basename =~ /\.([^.]*)$/;
3381         my $ext = $1 or return undef;
3382         return $highlight_ext{$ext}
3383                 if exists $highlight_ext{$ext};
3384
3385         return undef;
3386 }
3387
3388 # run highlighter and return FD of its output,
3389 # or return original FD if no highlighting
3390 sub run_highlighter {
3391         my ($fd, $highlight, $syntax) = @_;
3392         return $fd unless ($highlight && defined $syntax);
3393
3394         close $fd
3395                 or die_error(404, "Reading blob failed");
3396         open $fd, quote_command(git_cmd(), "cat-file", "blob", $hash)." | ".
3397                   quote_command($highlight_bin).
3398                   " --xhtml --fragment --syntax $syntax |"
3399                 or die_error(500, "Couldn't open file or run syntax highlighter");
3400         return $fd;
3401 }
3402
3403 ## ======================================================================
3404 ## functions printing HTML: header, footer, error page
3405
3406 sub get_page_title {
3407         my $title = to_utf8($site_name);
3408
3409         return $title unless (defined $project);
3410         $title .= " - " . to_utf8($project);
3411
3412         return $title unless (defined $action);
3413         $title .= "/$action"; # $action is US-ASCII (7bit ASCII)
3414
3415         return $title unless (defined $file_name);
3416         $title .= " - " . esc_path($file_name);
3417         if ($action eq "tree" && $file_name !~ m|/$|) {
3418                 $title .= "/";
3419         }
3420
3421         return $title;
3422 }
3423
3424 sub git_header_html {
3425         my $status = shift || "200 OK";
3426         my $expires = shift;
3427         my %opts = @_;
3428
3429         my $title = get_page_title();
3430         my $content_type;
3431         # require explicit support from the UA if we are to send the page as
3432         # 'application/xhtml+xml', otherwise send it as plain old 'text/html'.
3433         # we have to do this because MSIE sometimes globs '*/*', pretending to
3434         # support xhtml+xml but choking when it gets what it asked for.
3435         if (defined $cgi->http('HTTP_ACCEPT') &&
3436             $cgi->http('HTTP_ACCEPT') =~ m/(,|;|\s|^)application\/xhtml\+xml(,|;|\s|$)/ &&
3437             $cgi->Accept('application/xhtml+xml') != 0) {
3438                 $content_type = 'application/xhtml+xml';
3439         } else {
3440                 $content_type = 'text/html';
3441         }
3442         print $cgi->header(-type=>$content_type, -charset => 'utf-8',
3443                            -status=> $status, -expires => $expires)
3444                 unless ($opts{'-no_http_header'});
3445         my $mod_perl_version = $ENV{'MOD_PERL'} ? " $ENV{'MOD_PERL'}" : '';
3446         print <<EOF;
3447 <?xml version="1.0" encoding="utf-8"?>
3448 <!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Strict//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-strict.dtd">
3449 <html xmlns="http://www.w3.org/1999/xhtml" xml:lang="en-US" lang="en-US">
3450 <!-- git web interface version $version, (C) 2005-2006, Kay Sievers <kay.sievers\@vrfy.org>, Christian Gierke -->
3451 <!-- git core binaries version $git_version -->
3452 <head>
3453 <meta http-equiv="content-type" content="$content_type; charset=utf-8"/>
3454 <meta name="generator" content="gitweb/$version git/$git_version$mod_perl_version"/>
3455 <meta name="robots" content="index, nofollow"/>
3456 <title>$title</title>
3457 EOF
3458         # the stylesheet, favicon etc urls won't work correctly with path_info
3459         # unless we set the appropriate base URL
3460         if ($ENV{'PATH_INFO'}) {
3461                 print "<base href=\"".esc_url($base_url)."\" />\n";
3462         }
3463         # print out each stylesheet that exist, providing backwards capability
3464         # for those people who defined $stylesheet in a config file
3465         if (defined $stylesheet) {
3466                 print '<link rel="stylesheet" type="text/css" href="'.$stylesheet.'"/>'."\n";
3467         } else {
3468                 foreach my $stylesheet (@stylesheets) {
3469                         next unless $stylesheet;
3470                         print '<link rel="stylesheet" type="text/css" href="'.$stylesheet.'"/>'."\n";
3471                 }
3472         }
3473         if (defined $project) {
3474                 my %href_params = get_feed_info();
3475                 if (!exists $href_params{'-title'}) {
3476                         $href_params{'-title'} = 'log';
3477                 }
3478
3479                 foreach my $format qw(RSS Atom) {
3480                         my $type = lc($format);
3481                         my %link_attr = (
3482                                 '-rel' => 'alternate',
3483                                 '-title' => "$project - $href_params{'-title'} - $format feed",
3484                                 '-type' => "application/$type+xml"
3485                         );
3486
3487                         $href_params{'action'} = $type;
3488                         $link_attr{'-href'} = href(%href_params);
3489                         print "<link ".
3490                               "rel=\"$link_attr{'-rel'}\" ".
3491                               "title=\"$link_attr{'-title'}\" ".
3492                               "href=\"$link_attr{'-href'}\" ".
3493                               "type=\"$link_attr{'-type'}\" ".
3494                               "/>\n";
3495
3496                         $href_params{'extra_options'} = '--no-merges';
3497                         $link_attr{'-href'} = href(%href_params);
3498                         $link_attr{'-title'} .= ' (no merges)';
3499                         print "<link ".
3500                               "rel=\"$link_attr{'-rel'}\" ".
3501                               "title=\"$link_attr{'-title'}\" ".
3502                               "href=\"$link_attr{'-href'}\" ".
3503                               "type=\"$link_attr{'-type'}\" ".
3504                               "/>\n";
3505                 }
3506
3507         } else {
3508                 printf('<link rel="alternate" title="%s projects list" '.
3509                        'href="%s" type="text/plain; charset=utf-8" />'."\n",
3510                        $site_name, href(project=>undef, action=>"project_index"));
3511                 printf('<link rel="alternate" title="%s projects feeds" '.
3512                        'href="%s" type="text/x-opml" />'."\n",
3513                        $site_name, href(project=>undef, action=>"opml"));
3514         }
3515         if (defined $favicon) {
3516                 print qq(<link rel="shortcut icon" href="$favicon" type="image/png" />\n);
3517         }
3518
3519         print "</head>\n" .
3520               "<body>\n";
3521
3522         if (defined $site_header && -f $site_header) {
3523                 insert_file($site_header);
3524         }
3525
3526         print "<div class=\"page_header\">\n" .
3527               $cgi->a({-href => esc_url($logo_url),
3528                        -title => $logo_label},
3529                       qq(<img src="$logo" width="72" height="27" alt="git" class="logo"/>));
3530         print $cgi->a({-href => esc_url($home_link)}, $home_link_str) . " / ";
3531         if (defined $project) {
3532                 print $cgi->a({-href => href(action=>"summary")}, esc_html($project));
3533                 if (defined $action) {
3534                         print " / $action";
3535                 }
3536                 print "\n";
3537         }
3538         print "</div>\n";
3539
3540         my $have_search = gitweb_check_feature('search');
3541         if (defined $project && $have_search) {
3542                 if (!defined $searchtext) {
3543                         $searchtext = "";
3544                 }
3545                 my $search_hash;
3546                 if (defined $hash_base) {
3547                         $search_hash = $hash_base;
3548                 } elsif (defined $hash) {
3549                         $search_hash = $hash;
3550                 } else {
3551                         $search_hash = "HEAD";
3552                 }
3553                 my $action = $my_uri;
3554                 my $use_pathinfo = gitweb_check_feature('pathinfo');
3555                 if ($use_pathinfo) {
3556                         $action .= "/".esc_url($project);
3557                 }
3558                 print $cgi->startform(-method => "get", -action => $action) .
3559                       "<div class=\"search\">\n" .
3560                       (!$use_pathinfo &&
3561                       $cgi->input({-name=>"p", -value=>$project, -type=>"hidden"}) . "\n") .
3562                       $cgi->input({-name=>"a", -value=>"search", -type=>"hidden"}) . "\n" .
3563                       $cgi->input({-name=>"h", -value=>$search_hash, -type=>"hidden"}) . "\n" .
3564                       $cgi->popup_menu(-name => 'st', -default => 'commit',
3565                                        -values => ['commit', 'grep', 'author', 'committer', 'pickaxe']) .
3566                       $cgi->sup($cgi->a({-href => href(action=>"search_help")}, "?")) .
3567                       " search:\n",
3568                       $cgi->textfield(-name => "s", -value => $searchtext) . "\n" .
3569                       "<span title=\"Extended regular expression\">" .
3570                       $cgi->checkbox(-name => 'sr', -value => 1, -label => 're',
3571                                      -checked => $search_use_regexp) .
3572                       "</span>" .
3573                       "</div>" .
3574                       $cgi->end_form() . "\n";
3575         }
3576 }
3577
3578 sub git_footer_html {
3579         my $feed_class = 'rss_logo';
3580
3581         print "<div class=\"page_footer\">\n";
3582         if (defined $project) {
3583                 my $descr = git_get_project_description($project);
3584                 if (defined $descr) {
3585                         print "<div class=\"page_footer_text\">" . esc_html($descr) . "</div>\n";
3586                 }
3587
3588                 my %href_params = get_feed_info();
3589                 if (!%href_params) {
3590                         $feed_class .= ' generic';
3591                 }
3592                 $href_params{'-title'} ||= 'log';
3593
3594                 foreach my $format qw(RSS Atom) {
3595                         $href_params{'action'} = lc($format);
3596                         print $cgi->a({-href => href(%href_params),
3597                                       -title => "$href_params{'-title'} $format feed",
3598                                       -class => $feed_class}, $format)."\n";
3599                 }
3600
3601         } else {
3602                 print $cgi->a({-href => href(project=>undef, action=>"opml"),
3603                               -class => $feed_class}, "OPML") . " ";
3604                 print $cgi->a({-href => href(project=>undef, action=>"project_index"),
3605                               -class => $feed_class}, "TXT") . "\n";
3606         }
3607         print "</div>\n"; # class="page_footer"
3608
3609         if (defined $t0 && gitweb_check_feature('timed')) {
3610                 print "<div id=\"generating_info\">\n";
3611                 print 'This page took '.
3612                       '<span id="generating_time" class="time_span">'.
3613                       Time::HiRes::tv_interval($t0, [Time::HiRes::gettimeofday()]).
3614                       ' seconds </span>'.
3615                       ' and '.
3616                       '<span id="generating_cmd">'.
3617                       $number_of_git_cmds.
3618                       '</span> git commands '.
3619                       " to generate.\n";
3620                 print "</div>\n"; # class="page_footer"
3621         }
3622
3623         if (defined $site_footer && -f $site_footer) {
3624                 insert_file($site_footer);
3625         }
3626
3627         print qq!<script type="text/javascript" src="$javascript"></script>\n!;
3628         if (defined $action &&
3629             $action eq 'blame_incremental') {
3630                 print qq!<script type="text/javascript">\n!.
3631                       qq!startBlame("!. href(action=>"blame_data", -replay=>1) .qq!",\n!.
3632                       qq!           "!. href() .qq!");\n!.
3633                       qq!</script>\n!;
3634         } elsif (gitweb_check_feature('javascript-actions')) {
3635                 print qq!<script type="text/javascript">\n!.
3636                       qq!window.onload = fixLinks;\n!.
3637                       qq!</script>\n!;
3638         }
3639
3640         print "</body>\n" .
3641               "</html>";
3642 }
3643
3644 # die_error(<http_status_code>, <error_message>[, <detailed_html_description>])
3645 # Example: die_error(404, 'Hash not found')
3646 # By convention, use the following status codes (as defined in RFC 2616):
3647 # 400: Invalid or missing CGI parameters, or
3648 #      requested object exists but has wrong type.
3649 # 403: Requested feature (like "pickaxe" or "snapshot") not enabled on
3650 #      this server or project.
3651 # 404: Requested object/revision/project doesn't exist.
3652 # 500: The server isn't configured properly, or
3653 #      an internal error occurred (e.g. failed assertions caused by bugs), or
3654 #      an unknown error occurred (e.g. the git binary died unexpectedly).
3655 # 503: The server is currently unavailable (because it is overloaded,
3656 #      or down for maintenance).  Generally, this is a temporary state.
3657 sub die_error {
3658         my $status = shift || 500;
3659         my $error = esc_html(shift) || "Internal Server Error";
3660         my $extra = shift;
3661         my %opts = @_;
3662
3663         my %http_responses = (
3664                 400 => '400 Bad Request',
3665                 403 => '403 Forbidden',
3666                 404 => '404 Not Found',
3667                 500 => '500 Internal Server Error',
3668                 503 => '503 Service Unavailable',
3669         );
3670         git_header_html($http_responses{$status}, undef, %opts);
3671         print <<EOF;
3672 <div class="page_body">
3673 <br /><br />
3674 $status - $error
3675 <br />
3676 EOF
3677         if (defined $extra) {
3678                 print "<hr />\n" .
3679                       "$extra\n";
3680         }
3681         print "</div>\n";
3682
3683         git_footer_html();
3684         goto DONE_GITWEB
3685                 unless ($opts{'-error_handler'});
3686 }
3687
3688 ## ----------------------------------------------------------------------
3689 ## functions printing or outputting HTML: navigation
3690
3691 sub git_print_page_nav {
3692         my ($current, $suppress, $head, $treehead, $treebase, $extra) = @_;
3693         $extra = '' if !defined $extra; # pager or formats
3694
3695         my @navs = qw(summary shortlog log commit commitdiff tree);
3696         if ($suppress) {
3697                 @navs = grep { $_ ne $suppress } @navs;
3698         }
3699
3700         my %arg = map { $_ => {action=>$_} } @navs;
3701         if (defined $head) {
3702                 for (qw(commit commitdiff)) {
3703                         $arg{$_}{'hash'} = $head;
3704                 }
3705                 if ($current =~ m/^(tree | log | shortlog | commit | commitdiff | search)$/x) {
3706                         for (qw(shortlog log)) {
3707                                 $arg{$_}{'hash'} = $head;
3708                         }
3709                 }
3710         }
3711
3712         $arg{'tree'}{'hash'} = $treehead if defined $treehead;
3713         $arg{'tree'}{'hash_base'} = $treebase if defined $treebase;
3714
3715         my @actions = gitweb_get_feature('actions');
3716         my %repl = (
3717                 '%' => '%',
3718                 'n' => $project,         # project name
3719                 'f' => $git_dir,         # project path within filesystem
3720                 'h' => $treehead || '',  # current hash ('h' parameter)
3721                 'b' => $treebase || '',  # hash base ('hb' parameter)
3722         );
3723         while (@actions) {
3724                 my ($label, $link, $pos) = splice(@actions,0,3);
3725                 # insert
3726                 @navs = map { $_ eq $pos ? ($_, $label) : $_ } @navs;
3727                 # munch munch
3728                 $link =~ s/%([%nfhb])/$repl{$1}/g;
3729                 $arg{$label}{'_href'} = $link;
3730         }
3731
3732         print "<div class=\"page_nav\">\n" .
3733                 (join " | ",
3734                  map { $_ eq $current ?
3735                        $_ : $cgi->a({-href => ($arg{$_}{_href} ? $arg{$_}{_href} : href(%{$arg{$_}}))}, "$_")
3736                  } @navs);
3737         print "<br/>\n$extra<br/>\n" .
3738               "</div>\n";
3739 }
3740
3741 sub format_paging_nav {
3742         my ($action, $page, $has_next_link) = @_;
3743         my $paging_nav;
3744
3745
3746         if ($page > 0) {
3747                 $paging_nav .=
3748                         $cgi->a({-href => href(-replay=>1, page=>undef)}, "first") .
3749                         " &sdot; " .
3750                         $cgi->a({-href => href(-replay=>1, page=>$page-1),
3751                                  -accesskey => "p", -title => "Alt-p"}, "prev");
3752         } else {
3753                 $paging_nav .= "first &sdot; prev";
3754         }
3755
3756         if ($has_next_link) {
3757                 $paging_nav .= " &sdot; " .
3758                         $cgi->a({-href => href(-replay=>1, page=>$page+1),
3759                                  -accesskey => "n", -title => "Alt-n"}, "next");
3760         } else {
3761                 $paging_nav .= " &sdot; next";
3762         }
3763
3764         return $paging_nav;
3765 }
3766
3767 ## ......................................................................
3768 ## functions printing or outputting HTML: div
3769
3770 sub git_print_header_div {
3771         my ($action, $title, $hash, $hash_base) = @_;
3772         my %args = ();
3773
3774         $args{'action'} = $action;
3775         $args{'hash'} = $hash if $hash;
3776         $args{'hash_base'} = $hash_base if $hash_base;
3777
3778         print "<div class=\"header\">\n" .
3779               $cgi->a({-href => href(%args), -class => "title"},
3780               $title ? $title : $action) .
3781               "\n</div>\n";
3782 }
3783
3784 sub print_local_time {
3785         print format_local_time(@_);
3786 }
3787
3788 sub format_local_time {
3789         my $localtime = '';
3790         my %date = @_;
3791         if ($date{'hour_local'} < 6) {
3792                 $localtime .= sprintf(" (<span class=\"atnight\">%02d:%02d</span> %s)",
3793                         $date{'hour_local'}, $date{'minute_local'}, $date{'tz_local'});
3794         } else {
3795                 $localtime .= sprintf(" (%02d:%02d %s)",
3796                         $date{'hour_local'}, $date{'minute_local'}, $date{'tz_local'});
3797         }
3798
3799         return $localtime;
3800 }
3801
3802 # Outputs the author name and date in long form
3803 sub git_print_authorship {
3804         my $co = shift;
3805         my %opts = @_;
3806         my $tag = $opts{-tag} || 'div';
3807         my $author = $co->{'author_name'};
3808
3809         my %ad = parse_date($co->{'author_epoch'}, $co->{'author_tz'});
3810         print "<$tag class=\"author_date\">" .
3811               format_search_author($author, "author", esc_html($author)) .
3812               " [$ad{'rfc2822'}";
3813         print_local_time(%ad) if ($opts{-localtime});
3814         print "]" . git_get_avatar($co->{'author_email'}, -pad_before => 1)
3815                   . "</$tag>\n";
3816 }
3817
3818 # Outputs table rows containing the full author or committer information,
3819 # in the format expected for 'commit' view (& similar).
3820 # Parameters are a commit hash reference, followed by the list of people
3821 # to output information for. If the list is empty it defaults to both
3822 # author and committer.
3823 sub git_print_authorship_rows {
3824         my $co = shift;
3825         # too bad we can't use @people = @_ || ('author', 'committer')
3826         my @people = @_;
3827         @people = ('author', 'committer') unless @people;
3828         foreach my $who (@people) {
3829                 my %wd = parse_date($co->{"${who}_epoch"}, $co->{"${who}_tz"});
3830                 print "<tr><td>$who</td><td>" .
3831                       format_search_author($co->{"${who}_name"}, $who,
3832                                esc_html($co->{"${who}_name"})) . " " .
3833                       format_search_author($co->{"${who}_email"}, $who,
3834                                esc_html("<" . $co->{"${who}_email"} . ">")) .
3835                       "</td><td rowspan=\"2\">" .
3836                       git_get_avatar($co->{"${who}_email"}, -size => 'double') .
3837                       "</td></tr>\n" .
3838                       "<tr>" .
3839                       "<td></td><td> $wd{'rfc2822'}";
3840                 print_local_time(%wd);
3841                 print "</td>" .
3842                       "</tr>\n";
3843         }
3844 }
3845
3846 sub git_print_page_path {
3847         my $name = shift;
3848         my $type = shift;
3849         my $hb = shift;
3850
3851
3852         print "<div class=\"page_path\">";
3853         print $cgi->a({-href => href(action=>"tree", hash_base=>$hb),
3854                       -title => 'tree root'}, to_utf8("[$project]"));
3855         print " / ";
3856         if (defined $name) {
3857                 my @dirname = split '/', $name;
3858                 my $basename = pop @dirname;
3859                 my $fullname = '';
3860
3861                 foreach my $dir (@dirname) {
3862                         $fullname .= ($fullname ? '/' : '') . $dir;
3863                         print $cgi->a({-href => href(action=>"tree", file_name=>$fullname,
3864                                                      hash_base=>$hb),
3865                                       -title => $fullname}, esc_path($dir));
3866                         print " / ";
3867                 }
3868                 if (defined $type && $type eq 'blob') {
3869                         print $cgi->a({-href => href(action=>"blob_plain", file_name=>$file_name,
3870                                                      hash_base=>$hb),
3871                                       -title => $name}, esc_path($basename));
3872                 } elsif (defined $type && $type eq 'tree') {
3873                         print $cgi->a({-href => href(action=>"tree", file_name=>$file_name,
3874                                                      hash_base=>$hb),
3875                                       -title => $name}, esc_path($basename));
3876                         print " / ";
3877                 } else {
3878                         print esc_path($basename);
3879                 }
3880         }
3881         print "<br/></div>\n";
3882 }
3883
3884 sub git_print_log {
3885         my $log = shift;
3886         my %opts = @_;
3887
3888         if ($opts{'-remove_title'}) {
3889                 # remove title, i.e. first line of log
3890                 shift @$log;
3891         }
3892         # remove leading empty lines
3893         while (defined $log->[0] && $log->[0] eq "") {
3894                 shift @$log;
3895         }
3896
3897         # print log
3898         my $signoff = 0;
3899         my $empty = 0;
3900         foreach my $line (@$log) {
3901                 if ($line =~ m/^ *(signed[ \-]off[ \-]by[ :]|acked[ \-]by[ :]|cc[ :])/i) {
3902                         $signoff = 1;
3903                         $empty = 0;
3904                         if (! $opts{'-remove_signoff'}) {
3905                                 print "<span class=\"signoff\">" . esc_html($line) . "</span><br/>\n";
3906                                 next;
3907                         } else {
3908                                 # remove signoff lines
3909                                 next;
3910                         }
3911                 } else {
3912                         $signoff = 0;
3913                 }
3914
3915                 # print only one empty line
3916                 # do not print empty line after signoff
3917                 if ($line eq "") {
3918                         next if ($empty || $signoff);
3919                         $empty = 1;
3920                 } else {
3921                         $empty = 0;
3922                 }
3923
3924                 print format_log_line_html($line) . "<br/>\n";
3925         }
3926
3927         if ($opts{'-final_empty_line'}) {
3928                 # end with single empty line
3929                 print "<br/>\n" unless $empty;
3930         }
3931 }
3932
3933 # return link target (what link points to)
3934 sub git_get_link_target {
3935         my $hash = shift;
3936         my $link_target;
3937
3938         # read link
3939         open my $fd, "-|", git_cmd(), "cat-file", "blob", $hash
3940                 or return;
3941         {
3942                 local $/ = undef;
3943                 $link_target = <$fd>;
3944         }
3945         close $fd
3946                 or return;
3947
3948         return $link_target;
3949 }
3950
3951 # given link target, and the directory (basedir) the link is in,
3952 # return target of link relative to top directory (top tree);
3953 # return undef if it is not possible (including absolute links).
3954 sub normalize_link_target {
3955         my ($link_target, $basedir) = @_;
3956
3957         # absolute symlinks (beginning with '/') cannot be normalized
3958         return if (substr($link_target, 0, 1) eq '/');
3959
3960         # normalize link target to path from top (root) tree (dir)
3961         my $path;
3962         if ($basedir) {
3963                 $path = $basedir . '/' . $link_target;
3964         } else {
3965                 # we are in top (root) tree (dir)
3966                 $path = $link_target;
3967         }
3968
3969         # remove //, /./, and /../
3970         my @path_parts;
3971         foreach my $part (split('/', $path)) {
3972                 # discard '.' and ''
3973                 next if (!$part || $part eq '.');
3974                 # handle '..'
3975                 if ($part eq '..') {
3976                         if (@path_parts) {
3977                                 pop @path_parts;
3978                         } else {
3979                                 # link leads outside repository (outside top dir)
3980                                 return;
3981                         }
3982                 } else {
3983                         push @path_parts, $part;
3984                 }
3985         }
3986         $path = join('/', @path_parts);
3987
3988         return $path;
3989 }
3990
3991 # print tree entry (row of git_tree), but without encompassing <tr> element
3992 sub git_print_tree_entry {
3993         my ($t, $basedir, $hash_base, $have_blame) = @_;
3994
3995         my %base_key = ();
3996         $base_key{'hash_base'} = $hash_base if defined $hash_base;
3997
3998         # The format of a table row is: mode list link.  Where mode is
3999         # the mode of the entry, list is the name of the entry, an href,
4000         # and link is the action links of the entry.
4001
4002         print "<td class=\"mode\">" . mode_str($t->{'mode'}) . "</td>\n";
4003         if (exists $t->{'size'}) {
4004                 print "<td class=\"size\">$t->{'size'}</td>\n";
4005         }
4006         if ($t->{'type'} eq "blob") {
4007                 print "<td class=\"list\">" .
4008                         $cgi->a({-href => href(action=>"blob", hash=>$t->{'hash'},
4009                                                file_name=>"$basedir$t->{'name'}", %base_key),
4010                                 -class => "list"}, esc_path($t->{'name'}));
4011                 if (S_ISLNK(oct $t->{'mode'})) {
4012                         my $link_target = git_get_link_target($t->{'hash'});
4013                         if ($link_target) {
4014                                 my $norm_target = normalize_link_target($link_target, $basedir);
4015                                 if (defined $norm_target) {
4016                                         print " -> " .
4017                                               $cgi->a({-href => href(action=>"object", hash_base=>$hash_base,
4018                                                                      file_name=>$norm_target),
4019                                                        -title => $norm_target}, esc_path($link_target));
4020                                 } else {
4021                                         print " -> " . esc_path($link_target);
4022                                 }
4023                         }
4024                 }
4025                 print "</td>\n";
4026                 print "<td class=\"link\">";
4027                 print $cgi->a({-href => href(action=>"blob", hash=>$t->{'hash'},
4028                                              file_name=>"$basedir$t->{'name'}", %base_key)},
4029                               "blob");
4030                 if ($have_blame) {
4031                         print " | " .
4032                               $cgi->a({-href => href(action=>"blame", hash=>$t->{'hash'},
4033                                                      file_name=>"$basedir$t->{'name'}", %base_key)},
4034                                       "blame");
4035                 }
4036                 if (defined $hash_base) {
4037                         print " | " .
4038                               $cgi->a({-href => href(action=>"history", hash_base=>$hash_base,
4039                                                      hash=>$t->{'hash'}, file_name=>"$basedir$t->{'name'}")},
4040                                       "history");
4041                 }
4042                 print " | " .
4043                         $cgi->a({-href => href(action=>"blob_plain", hash_base=>$hash_base,
4044                                                file_name=>"$basedir$t->{'name'}")},
4045                                 "raw");
4046                 print "</td>\n";
4047
4048         } elsif ($t->{'type'} eq "tree") {
4049                 print "<td class=\"list\">";
4050                 print $cgi->a({-href => href(action=>"tree", hash=>$t->{'hash'},
4051                                              file_name=>"$basedir$t->{'name'}",
4052                                              %base_key)},
4053                               esc_path($t->{'name'}));
4054                 print "</td>\n";
4055                 print "<td class=\"link\">";
4056                 print $cgi->a({-href => href(action=>"tree", hash=>$t->{'hash'},
4057                                              file_name=>"$basedir$t->{'name'}",
4058                                              %base_key)},
4059                               "tree");
4060                 if (defined $hash_base) {
4061                         print " | " .
4062                               $cgi->a({-href => href(action=>"history", hash_base=>$hash_base,
4063                                                      file_name=>"$basedir$t->{'name'}")},
4064                                       "history");
4065                 }
4066                 print "</td>\n";
4067         } else {
4068                 # unknown object: we can only present history for it
4069                 # (this includes 'commit' object, i.e. submodule support)
4070                 print "<td class=\"list\">" .
4071                       esc_path($t->{'name'}) .
4072                       "</td>\n";
4073                 print "<td class=\"link\">";
4074                 if (defined $hash_base) {
4075                         print $cgi->a({-href => href(action=>"history",
4076                                                      hash_base=>$hash_base,
4077                                                      file_name=>"$basedir$t->{'name'}")},
4078                                       "history");
4079                 }
4080                 print "</td>\n";
4081         }
4082 }
4083
4084 ## ......................................................................
4085 ## functions printing large fragments of HTML
4086
4087 # get pre-image filenames for merge (combined) diff
4088 sub fill_from_file_info {
4089         my ($diff, @parents) = @_;
4090
4091         $diff->{'from_file'} = [ ];
4092         $diff->{'from_file'}[$diff->{'nparents'} - 1] = undef;
4093         for (my $i = 0; $i < $diff->{'nparents'}; $i++) {
4094                 if ($diff->{'status'}[$i] eq 'R' ||
4095                     $diff->{'status'}[$i] eq 'C') {
4096                         $diff->{'from_file'}[$i] =
4097                                 git_get_path_by_hash($parents[$i], $diff->{'from_id'}[$i]);
4098                 }
4099         }
4100
4101         return $diff;
4102 }
4103
4104 # is current raw difftree line of file deletion
4105 sub is_deleted {
4106         my $diffinfo = shift;
4107
4108         return $diffinfo->{'to_id'} eq ('0' x 40);
4109 }
4110
4111 # does patch correspond to [previous] difftree raw line
4112 # $diffinfo  - hashref of parsed raw diff format
4113 # $patchinfo - hashref of parsed patch diff format
4114 #              (the same keys as in $diffinfo)
4115 sub is_patch_split {
4116         my ($diffinfo, $patchinfo) = @_;
4117
4118         return defined $diffinfo && defined $patchinfo
4119                 && $diffinfo->{'to_file'} eq $patchinfo->{'to_file'};
4120 }
4121
4122
4123 sub git_difftree_body {
4124         my ($difftree, $hash, @parents) = @_;
4125         my ($parent) = $parents[0];
4126         my $have_blame = gitweb_check_feature('blame');
4127         print "<div class=\"list_head\">\n";
4128         if ($#{$difftree} > 10) {
4129                 print(($#{$difftree} + 1) . " files changed:\n");
4130         }
4131         print "</div>\n";
4132
4133         print "<table class=\"" .
4134               (@parents > 1 ? "combined " : "") .
4135               "diff_tree\">\n";
4136
4137         # header only for combined diff in 'commitdiff' view
4138         my $has_header = @$difftree && @parents > 1 && $action eq 'commitdiff';
4139         if ($has_header) {
4140                 # table header
4141                 print "<thead><tr>\n" .
4142                        "<th></th><th></th>\n"; # filename, patchN link
4143                 for (my $i = 0; $i < @parents; $i++) {
4144                         my $par = $parents[$i];
4145                         print "<th>" .
4146                               $cgi->a({-href => href(action=>"commitdiff",
4147                                                      hash=>$hash, hash_parent=>$par),
4148                                        -title => 'commitdiff to parent number ' .
4149                                                   ($i+1) . ': ' . substr($par,0,7)},
4150                                       $i+1) .
4151                               "&nbsp;</th>\n";
4152                 }
4153                 print "</tr></thead>\n<tbody>\n";
4154         }
4155
4156         my $alternate = 1;
4157         my $patchno = 0;
4158         foreach my $line (@{$difftree}) {
4159                 my $diff = parsed_difftree_line($line);
4160
4161                 if ($alternate) {
4162                         print "<tr class=\"dark\">\n";
4163                 } else {
4164                         print "<tr class=\"light\">\n";
4165                 }
4166                 $alternate ^= 1;
4167
4168                 if (exists $diff->{'nparents'}) { # combined diff
4169
4170                         fill_from_file_info($diff, @parents)
4171                                 unless exists $diff->{'from_file'};
4172
4173                         if (!is_deleted($diff)) {
4174                                 # file exists in the result (child) commit
4175                                 print "<td>" .
4176                                       $cgi->a({-href => href(action=>"blob", hash=>$diff->{'to_id'},
4177                                                              file_name=>$diff->{'to_file'},
4178                                                              hash_base=>$hash),
4179                                               -class => "list"}, esc_path($diff->{'to_file'})) .
4180                                       "</td>\n";
4181                         } else {
4182                                 print "<td>" .
4183                                       esc_path($diff->{'to_file'}) .
4184                                       "</td>\n";
4185                         }
4186
4187                         if ($action eq 'commitdiff') {
4188                                 # link to patch
4189                                 $patchno++;
4190                                 print "<td class=\"link\">" .
4191                                       $cgi->a({-href => "#patch$patchno"}, "patch") .
4192                                       " | " .
4193                                       "</td>\n";
4194                         }
4195
4196                         my $has_history = 0;
4197                         my $not_deleted = 0;
4198                         for (my $i = 0; $i < $diff->{'nparents'}; $i++) {
4199                                 my $hash_parent = $parents[$i];
4200                                 my $from_hash = $diff->{'from_id'}[$i];
4201                                 my $from_path = $diff->{'from_file'}[$i];
4202                                 my $status = $diff->{'status'}[$i];
4203
4204                                 $has_history ||= ($status ne 'A');
4205                                 $not_deleted ||= ($status ne 'D');
4206
4207                                 if ($status eq 'A') {
4208                                         print "<td  class=\"link\" align=\"right\"> | </td>\n";
4209                                 } elsif ($status eq 'D') {
4210                                         print "<td class=\"link\">" .
4211                                               $cgi->a({-href => href(action=>"blob",
4212                                                                      hash_base=>$hash,
4213                                                                      hash=>$from_hash,
4214                                                                      file_name=>$from_path)},
4215                                                       "blob" . ($i+1)) .
4216                                               " | </td>\n";
4217                                 } else {
4218                                         if ($diff->{'to_id'} eq $from_hash) {
4219                                                 print "<td class=\"link nochange\">";
4220                                         } else {
4221                                                 print "<td class=\"link\">";
4222                                         }
4223                                         print $cgi->a({-href => href(action=>"blobdiff",
4224                                                                      hash=>$diff->{'to_id'},
4225                                                                      hash_parent=>$from_hash,
4226                                                                      hash_base=>$hash,
4227                                                                      hash_parent_base=>$hash_parent,
4228                                                                      file_name=>$diff->{'to_file'},
4229                                                                      file_parent=>$from_path)},
4230                                                       "diff" . ($i+1)) .
4231                                               " | </td>\n";
4232                                 }
4233                         }
4234
4235                         print "<td class=\"link\">";
4236                         if ($not_deleted) {
4237                                 print $cgi->a({-href => href(action=>"blob",
4238                                                              hash=>$diff->{'to_id'},
4239                                                              file_name=>$diff->{'to_file'},
4240                                                              hash_base=>$hash)},
4241                                               "blob");
4242                                 print " | " if ($has_history);
4243                         }
4244                         if ($has_history) {
4245                                 print $cgi->a({-href => href(action=>"history",
4246                                                              file_name=>$diff->{'to_file'},
4247                                                              hash_base=>$hash)},
4248                                               "history");
4249                         }
4250                         print "</td>\n";
4251
4252                         print "</tr>\n";
4253                         next; # instead of 'else' clause, to avoid extra indent
4254                 }
4255                 # else ordinary diff
4256
4257                 my ($to_mode_oct, $to_mode_str, $to_file_type);
4258                 my ($from_mode_oct, $from_mode_str, $from_file_type);
4259                 if ($diff->{'to_mode'} ne ('0' x 6)) {
4260                         $to_mode_oct = oct $diff->{'to_mode'};
4261                         if (S_ISREG($to_mode_oct)) { # only for regular file
4262                                 $to_mode_str = sprintf("%04o", $to_mode_oct & 0777); # permission bits
4263                         }
4264                         $to_file_type = file_type($diff->{'to_mode'});
4265                 }
4266                 if ($diff->{'from_mode'} ne ('0' x 6)) {
4267                         $from_mode_oct = oct $diff->{'from_mode'};
4268                         if (S_ISREG($to_mode_oct)) { # only for regular file
4269                                 $from_mode_str = sprintf("%04o", $from_mode_oct & 0777); # permission bits
4270                         }
4271                         $from_file_type = file_type($diff->{'from_mode'});
4272                 }
4273
4274                 if ($diff->{'status'} eq "A") { # created
4275                         my $mode_chng = "<span class=\"file_status new\">[new $to_file_type";
4276                         $mode_chng   .= " with mode: $to_mode_str" if $to_mode_str;
4277                         $mode_chng   .= "]</span>";
4278                         print "<td>";
4279                         print $cgi->a({-href => href(action=>"blob", hash=>$diff->{'to_id'},
4280                                                      hash_base=>$hash, file_name=>$diff->{'file'}),
4281                                       -class => "list"}, esc_path($diff->{'file'}));
4282                         print "</td>\n";
4283                         print "<td>$mode_chng</td>\n";
4284                         print "<td class=\"link\">";
4285                         if ($action eq 'commitdiff') {
4286                                 # link to patch
4287                                 $patchno++;
4288                                 print $cgi->a({-href => "#patch$patchno"}, "patch");
4289                                 print " | ";
4290                         }
4291                         print $cgi->a({-href => href(action=>"blob", hash=>$diff->{'to_id'},
4292                                                      hash_base=>$hash, file_name=>$diff->{'file'})},
4293                                       "blob");
4294                         print "</td>\n";
4295
4296                 } elsif ($diff->{'status'} eq "D") { # deleted
4297                         my $mode_chng = "<span class=\"file_status deleted\">[deleted $from_file_type]</span>";
4298                         print "<td>";
4299                         print $cgi->a({-href => href(action=>"blob", hash=>$diff->{'from_id'},
4300                                                      hash_base=>$parent, file_name=>$diff->{'file'}),
4301                                        -class => "list"}, esc_path($diff->{'file'}));
4302                         print "</td>\n";
4303                         print "<td>$mode_chng</td>\n";
4304                         print "<td class=\"link\">";
4305                         if ($action eq 'commitdiff') {
4306                                 # link to patch
4307                                 $patchno++;
4308                                 print $cgi->a({-href => "#patch$patchno"}, "patch");
4309                                 print " | ";
4310                         }
4311                         print $cgi->a({-href => href(action=>"blob", hash=>$diff->{'from_id'},
4312                                                      hash_base=>$parent, file_name=>$diff->{'file'})},
4313                                       "blob") . " | ";
4314                         if ($have_blame) {
4315                                 print $cgi->a({-href => href(action=>"blame", hash_base=>$parent,
4316                                                              file_name=>$diff->{'file'})},
4317                                               "blame") . " | ";
4318                         }
4319                         print $cgi->a({-href => href(action=>"history", hash_base=>$parent,
4320                                                      file_name=>$diff->{'file'})},
4321                                       "history");
4322                         print "</td>\n";
4323
4324                 } elsif ($diff->{'status'} eq "M" || $diff->{'status'} eq "T") { # modified, or type changed
4325                         my $mode_chnge = "";
4326                         if ($diff->{'from_mode'} != $diff->{'to_mode'}) {
4327                                 $mode_chnge = "<span class=\"file_status mode_chnge\">[changed";
4328                                 if ($from_file_type ne $to_file_type) {
4329                                         $mode_chnge .= " from $from_file_type to $to_file_type";
4330                                 }
4331                                 if (($from_mode_oct & 0777) != ($to_mode_oct & 0777)) {
4332                                         if ($from_mode_str && $to_mode_str) {
4333                                                 $mode_chnge .= " mode: $from_mode_str->$to_mode_str";
4334                                         } elsif ($to_mode_str) {
4335                                                 $mode_chnge .= " mode: $to_mode_str";
4336                                         }
4337                                 }
4338                                 $mode_chnge .= "]</span>\n";
4339                         }
4340                         print "<td>";
4341                         print $cgi->a({-href => href(action=>"blob", hash=>$diff->{'to_id'},
4342                                                      hash_base=>$hash, file_name=>$diff->{'file'}),
4343                                       -class => "list"}, esc_path($diff->{'file'}));
4344                         print "</td>\n";
4345                         print "<td>$mode_chnge</td>\n";
4346                         print "<td class=\"link\">";
4347                         if ($action eq 'commitdiff') {
4348                                 # link to patch
4349                                 $patchno++;
4350                                 print $cgi->a({-href => "#patch$patchno"}, "patch") .
4351                                       " | ";
4352                         } elsif ($diff->{'to_id'} ne $diff->{'from_id'}) {
4353                                 # "commit" view and modified file (not onlu mode changed)
4354                                 print $cgi->a({-href => href(action=>"blobdiff",
4355                                                              hash=>$diff->{'to_id'}, hash_parent=>$diff->{'from_id'},
4356                                                              hash_base=>$hash, hash_parent_base=>$parent,
4357                                                              file_name=>$diff->{'file'})},
4358                                               "diff") .
4359                                       " | ";
4360                         }
4361                         print $cgi->a({-href => href(action=>"blob", hash=>$diff->{'to_id'},
4362                                                      hash_base=>$hash, file_name=>$diff->{'file'})},
4363                                        "blob") . " | ";
4364                         if ($have_blame) {
4365                                 print $cgi->a({-href => href(action=>"blame", hash_base=>$hash,
4366                                                              file_name=>$diff->{'file'})},
4367                                               "blame") . " | ";
4368                         }
4369                         print $cgi->a({-href => href(action=>"history", hash_base=>$hash,
4370                                                      file_name=>$diff->{'file'})},
4371                                       "history");
4372                         print "</td>\n";
4373
4374                 } elsif ($diff->{'status'} eq "R" || $diff->{'status'} eq "C") { # renamed or copied
4375                         my %status_name = ('R' => 'moved', 'C' => 'copied');
4376                         my $nstatus = $status_name{$diff->{'status'}};
4377                         my $mode_chng = "";
4378                         if ($diff->{'from_mode'} != $diff->{'to_mode'}) {
4379                                 # mode also for directories, so we cannot use $to_mode_str
4380                                 $mode_chng = sprintf(", mode: %04o", $to_mode_oct & 0777);
4381                         }
4382                         print "<td>" .
4383                               $cgi->a({-href => href(action=>"blob", hash_base=>$hash,
4384                                                      hash=>$diff->{'to_id'}, file_name=>$diff->{'to_file'}),
4385                                       -class => "list"}, esc_path($diff->{'to_file'})) . "</td>\n" .
4386                               "<td><span class=\"file_status $nstatus\">[$nstatus from " .
4387                               $cgi->a({-href => href(action=>"blob", hash_base=>$parent,
4388                                                      hash=>$diff->{'from_id'}, file_name=>$diff->{'from_file'}),
4389                                       -class => "list"}, esc_path($diff->{'from_file'})) .
4390                               " with " . (int $diff->{'similarity'}) . "% similarity$mode_chng]</span></td>\n" .
4391                               "<td class=\"link\">";
4392                         if ($action eq 'commitdiff') {
4393                                 # link to patch
4394                                 $patchno++;
4395                                 print $cgi->a({-href => "#patch$patchno"}, "patch") .
4396                                       " | ";
4397                         } elsif ($diff->{'to_id'} ne $diff->{'from_id'}) {
4398                                 # "commit" view and modified file (not only pure rename or copy)
4399                                 print $cgi->a({-href => href(action=>"blobdiff",
4400                                                              hash=>$diff->{'to_id'}, hash_parent=>$diff->{'from_id'},
4401                                                              hash_base=>$hash, hash_parent_base=>$parent,
4402                                                              file_name=>$diff->{'to_file'}, file_parent=>$diff->{'from_file'})},
4403                                               "diff") .
4404                                       " | ";
4405                         }
4406                         print $cgi->a({-href => href(action=>"blob", hash=>$diff->{'to_id'},
4407                                                      hash_base=>$parent, file_name=>$diff->{'to_file'})},
4408                                       "blob") . " | ";
4409                         if ($have_blame) {
4410                                 print $cgi->a({-href => href(action=>"blame", hash_base=>$hash,
4411                                                              file_name=>$diff->{'to_file'})},
4412                                               "blame") . " | ";
4413                         }
4414                         print $cgi->a({-href => href(action=>"history", hash_base=>$hash,
4415                                                     file_name=>$diff->{'to_file'})},
4416                                       "history");
4417                         print "</td>\n";
4418
4419                 } # we should not encounter Unmerged (U) or Unknown (X) status
4420                 print "</tr>\n";
4421         }
4422         print "</tbody>" if $has_header;
4423         print "</table>\n";
4424 }
4425
4426 sub git_patchset_body {
4427         my ($fd, $difftree, $hash, @hash_parents) = @_;
4428         my ($hash_parent) = $hash_parents[0];
4429
4430         my $is_combined = (@hash_parents > 1);
4431         my $patch_idx = 0;
4432         my $patch_number = 0;
4433         my $patch_line;
4434         my $diffinfo;
4435         my $to_name;
4436         my (%from, %to);
4437
4438         print "<div class=\"patchset\">\n";
4439
4440         # skip to first patch
4441         while ($patch_line = <$fd>) {
4442                 chomp $patch_line;
4443
4444                 last if ($patch_line =~ m/^diff /);
4445         }
4446
4447  PATCH:
4448         while ($patch_line) {
4449
4450                 # parse "git diff" header line
4451                 if ($patch_line =~ m/^diff --git (\"(?:[^\\\"]*(?:\\.[^\\\"]*)*)\"|[^ "]*) (.*)$/) {
4452                         # $1 is from_name, which we do not use
4453                         $to_name = unquote($2);
4454                         $to_name =~ s!^b/!!;
4455                 } elsif ($patch_line =~ m/^diff --(cc|combined) ("?.*"?)$/) {
4456                         # $1 is 'cc' or 'combined', which we do not use
4457                         $to_name = unquote($2);
4458                 } else {
4459                         $to_name = undef;
4460                 }
4461
4462                 # check if current patch belong to current raw line
4463                 # and parse raw git-diff line if needed
4464                 if (is_patch_split($diffinfo, { 'to_file' => $to_name })) {
4465                         # this is continuation of a split patch
4466                         print "<div class=\"patch cont\">\n";
4467                 } else {
4468                         # advance raw git-diff output if needed
4469                         $patch_idx++ if defined $diffinfo;
4470
4471                         # read and prepare patch information
4472                         $diffinfo = parsed_difftree_line($difftree->[$patch_idx]);
4473
4474                         # compact combined diff output can have some patches skipped
4475                         # find which patch (using pathname of result) we are at now;
4476                         if ($is_combined) {
4477                                 while ($to_name ne $diffinfo->{'to_file'}) {
4478                                         print "<div class=\"patch\" id=\"patch". ($patch_idx+1) ."\">\n" .
4479                                               format_diff_cc_simplified($diffinfo, @hash_parents) .
4480                                               "</div>\n";  # class="patch"
4481
4482                                         $patch_idx++;
4483                                         $patch_number++;
4484
4485                                         last if $patch_idx > $#$difftree;
4486                                         $diffinfo = parsed_difftree_line($difftree->[$patch_idx]);
4487                                 }
4488                         }
4489
4490                         # modifies %from, %to hashes
4491                         parse_from_to_diffinfo($diffinfo, \%from, \%to, @hash_parents);
4492
4493                         # this is first patch for raw difftree line with $patch_idx index
4494                         # we index @$difftree array from 0, but number patches from 1
4495                         print "<div class=\"patch\" id=\"patch". ($patch_idx+1) ."\">\n";
4496                 }
4497
4498                 # git diff header
4499                 #assert($patch_line =~ m/^diff /) if DEBUG;
4500                 #assert($patch_line !~ m!$/$!) if DEBUG; # is chomp-ed
4501                 $patch_number++;
4502                 # print "git diff" header
4503                 print format_git_diff_header_line($patch_line, $diffinfo,
4504                                                   \%from, \%to);
4505
4506                 # print extended diff header
4507                 print "<div class=\"diff extended_header\">\n";
4508         EXTENDED_HEADER:
4509                 while ($patch_line = <$fd>) {
4510                         chomp $patch_line;
4511
4512                         last EXTENDED_HEADER if ($patch_line =~ m/^--- |^diff /);
4513
4514                         print format_extended_diff_header_line($patch_line, $diffinfo,
4515                                                                \%from, \%to);
4516                 }
4517                 print "</div>\n"; # class="diff extended_header"
4518
4519                 # from-file/to-file diff header
4520                 if (! $patch_line) {
4521                         print "</div>\n"; # class="patch"
4522                         last PATCH;
4523                 }
4524                 next PATCH if ($patch_line =~ m/^diff /);
4525                 #assert($patch_line =~ m/^---/) if DEBUG;
4526
4527                 my $last_patch_line = $patch_line;
4528                 $patch_line = <$fd>;
4529                 chomp $patch_line;
4530                 #assert($patch_line =~ m/^\+\+\+/) if DEBUG;
4531
4532                 print format_diff_from_to_header($last_patch_line, $patch_line,
4533                                                  $diffinfo, \%from, \%to,
4534                                                  @hash_parents);
4535
4536                 # the patch itself
4537         LINE:
4538                 while ($patch_line = <$fd>) {
4539                         chomp $patch_line;
4540
4541                         next PATCH if ($patch_line =~ m/^diff /);
4542
4543                         print format_diff_line($patch_line, \%from, \%to);
4544                 }
4545
4546         } continue {
4547                 print "</div>\n"; # class="patch"
4548         }
4549
4550         # for compact combined (--cc) format, with chunk and patch simplification
4551         # the patchset might be empty, but there might be unprocessed raw lines
4552         for (++$patch_idx if $patch_number > 0;
4553              $patch_idx < @$difftree;
4554              ++$patch_idx) {
4555                 # read and prepare patch information
4556                 $diffinfo = parsed_difftree_line($difftree->[$patch_idx]);
4557
4558                 # generate anchor for "patch" links in difftree / whatchanged part
4559                 print "<div class=\"patch\" id=\"patch". ($patch_idx+1) ."\">\n" .
4560                       format_diff_cc_simplified($diffinfo, @hash_parents) .
4561                       "</div>\n";  # class="patch"
4562
4563                 $patch_number++;
4564         }
4565
4566         if ($patch_number == 0) {
4567                 if (@hash_parents > 1) {
4568                         print "<div class=\"diff nodifferences\">Trivial merge</div>\n";
4569                 } else {
4570                         print "<div class=\"diff nodifferences\">No differences found</div>\n";
4571                 }
4572         }
4573
4574         print "</div>\n"; # class="patchset"
4575 }
4576
4577 # . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
4578
4579 # fills project list info (age, description, owner, forks) for each
4580 # project in the list, removing invalid projects from returned list
4581 # NOTE: modifies $projlist, but does not remove entries from it
4582 sub fill_project_list_info {
4583         my ($projlist, $check_forks) = @_;
4584         my @projects;
4585
4586         my $show_ctags = gitweb_check_feature('ctags');
4587  PROJECT:
4588         foreach my $pr (@$projlist) {
4589                 my (@activity) = git_get_last_activity($pr->{'path'});
4590                 unless (@activity) {
4591                         next PROJECT;
4592                 }
4593                 ($pr->{'age'}, $pr->{'age_string'}) = @activity;
4594                 if (!defined $pr->{'descr'}) {
4595                         my $descr = git_get_project_description($pr->{'path'}) || "";
4596                         $descr = to_utf8($descr);
4597                         $pr->{'descr_long'} = $descr;
4598                         $pr->{'descr'} = chop_str($descr, $projects_list_description_width, 5);
4599                 }
4600                 if (!defined $pr->{'owner'}) {
4601                         $pr->{'owner'} = git_get_project_owner("$pr->{'path'}") || "";
4602                 }
4603                 if ($check_forks) {
4604                         my $pname = $pr->{'path'};
4605                         if (($pname =~ s/\.git$//) &&
4606                             ($pname !~ /\/$/) &&
4607                             (-d "$projectroot/$pname")) {
4608                                 $pr->{'forks'} = "-d $projectroot/$pname";
4609                         } else {
4610                                 $pr->{'forks'} = 0;
4611                         }
4612                 }
4613                 $show_ctags and $pr->{'ctags'} = git_get_project_ctags($pr->{'path'});
4614                 push @projects, $pr;
4615         }
4616
4617         return @projects;
4618 }
4619
4620 # print 'sort by' <th> element, generating 'sort by $name' replay link
4621 # if that order is not selected
4622 sub print_sort_th {
4623         print format_sort_th(@_);
4624 }
4625
4626 sub format_sort_th {
4627         my ($name, $order, $header) = @_;
4628         my $sort_th = "";
4629         $header ||= ucfirst($name);
4630
4631         if ($order eq $name) {
4632                 $sort_th .= "<th>$header</th>\n";
4633         } else {
4634                 $sort_th .= "<th>" .
4635                             $cgi->a({-href => href(-replay=>1, order=>$name),
4636                                      -class => "header"}, $header) .
4637                             "</th>\n";
4638         }
4639
4640         return $sort_th;
4641 }
4642
4643 sub git_project_list_body {
4644         # actually uses global variable $project
4645         my ($projlist, $order, $from, $to, $extra, $no_header) = @_;
4646
4647         my $check_forks = gitweb_check_feature('forks');
4648         my @projects = fill_project_list_info($projlist, $check_forks);
4649
4650         $order ||= $default_projects_order;
4651         $from = 0 unless defined $from;
4652         $to = $#projects if (!defined $to || $#projects < $to);
4653
4654         my %order_info = (
4655                 project => { key => 'path', type => 'str' },
4656                 descr => { key => 'descr_long', type => 'str' },
4657                 owner => { key => 'owner', type => 'str' },
4658                 age => { key => 'age', type => 'num' }
4659         );
4660         my $oi = $order_info{$order};
4661         if ($oi->{'type'} eq 'str') {
4662                 @projects = sort {$a->{$oi->{'key'}} cmp $b->{$oi->{'key'}}} @projects;
4663         } else {
4664                 @projects = sort {$a->{$oi->{'key'}} <=> $b->{$oi->{'key'}}} @projects;
4665         }
4666
4667         my $show_ctags = gitweb_check_feature('ctags');
4668         if ($show_ctags) {
4669                 my %ctags;
4670                 foreach my $p (@projects) {
4671                         foreach my $ct (keys %{$p->{'ctags'}}) {
4672                                 $ctags{$ct} += $p->{'ctags'}->{$ct};
4673                         }
4674                 }
4675                 my $cloud = git_populate_project_tagcloud(\%ctags);
4676                 print git_show_project_tagcloud($cloud, 64);
4677         }
4678
4679         print "<table class=\"project_list\">\n";
4680         unless ($no_header) {
4681                 print "<tr>\n";
4682                 if ($check_forks) {
4683                         print "<th></th>\n";
4684                 }
4685                 print_sort_th('project', $order, 'Project');
4686                 print_sort_th('descr', $order, 'Description');
4687                 print_sort_th('owner', $order, 'Owner');
4688                 print_sort_th('age', $order, 'Last Change');
4689                 print "<th></th>\n" . # for links
4690                       "</tr>\n";
4691         }
4692         my $alternate = 1;
4693         my $tagfilter = $cgi->param('by_tag');
4694         for (my $i = $from; $i <= $to; $i++) {
4695                 my $pr = $projects[$i];
4696
4697                 next if $tagfilter and $show_ctags and not grep { lc $_ eq lc $tagfilter } keys %{$pr->{'ctags'}};
4698                 next if $searchtext and not $pr->{'path'} =~ /$searchtext/
4699                         and not $pr->{'descr_long'} =~ /$searchtext/;
4700                 # Weed out forks or non-matching entries of search
4701                 if ($check_forks) {
4702                         my $forkbase = $project; $forkbase ||= ''; $forkbase =~ s#\.git$#/#;
4703                         $forkbase="^$forkbase" if $forkbase;
4704                         next if not $searchtext and not $tagfilter and $show_ctags
4705                                 and $pr->{'path'} =~ m#$forkbase.*/.*#; # regexp-safe
4706                 }
4707
4708                 if ($alternate) {
4709                         print "<tr class=\"dark\">\n";
4710                 } else {
4711                         print "<tr class=\"light\">\n";
4712                 }
4713                 $alternate ^= 1;
4714                 if ($check_forks) {
4715                         print "<td>";
4716                         if ($pr->{'forks'}) {
4717                                 print "<!-- $pr->{'forks'} -->\n";
4718                                 print $cgi->a({-href => href(project=>$pr->{'path'}, action=>"forks")}, "+");
4719                         }
4720                         print "</td>\n";
4721                 }
4722                 print "<td>" . $cgi->a({-href => href(project=>$pr->{'path'}, action=>"summary"),
4723                                         -class => "list"}, esc_html($pr->{'path'})) . "</td>\n" .
4724                       "<td>" . $cgi->a({-href => href(project=>$pr->{'path'}, action=>"summary"),
4725                                         -class => "list", -title => $pr->{'descr_long'}},
4726                                         esc_html($pr->{'descr'})) . "</td>\n" .
4727                       "<td><i>" . chop_and_escape_str($pr->{'owner'}, 15) . "</i></td>\n";
4728                 print "<td class=\"". age_class($pr->{'age'}) . "\">" .
4729                       (defined $pr->{'age_string'} ? $pr->{'age_string'} : "No commits") . "</td>\n" .
4730                       "<td class=\"link\">" .
4731                       $cgi->a({-href => href(project=>$pr->{'path'}, action=>"summary")}, "summary")   . " | " .
4732                       $cgi->a({-href => href(project=>$pr->{'path'}, action=>"shortlog")}, "shortlog") . " | " .
4733                       $cgi->a({-href => href(project=>$pr->{'path'}, action=>"log")}, "log") . " | " .
4734                       $cgi->a({-href => href(project=>$pr->{'path'}, action=>"tree")}, "tree") .
4735                       ($pr->{'forks'} ? " | " . $cgi->a({-href => href(project=>$pr->{'path'}, action=>"forks")}, "forks") : '') .
4736                       "</td>\n" .
4737                       "</tr>\n";
4738         }
4739         if (defined $extra) {
4740                 print "<tr>\n";
4741                 if ($check_forks) {
4742                         print "<td></td>\n";
4743                 }
4744                 print "<td colspan=\"5\">$extra</td>\n" .
4745                       "</tr>\n";
4746         }
4747         print "</table>\n";
4748 }
4749
4750 sub git_log_body {
4751         # uses global variable $project
4752         my ($commitlist, $from, $to, $refs, $extra) = @_;
4753
4754         $from = 0 unless defined $from;
4755         $to = $#{$commitlist} if (!defined $to || $#{$commitlist} < $to);
4756
4757         for (my $i = 0; $i <= $to; $i++) {
4758                 my %co = %{$commitlist->[$i]};
4759                 next if !%co;
4760                 my $commit = $co{'id'};
4761                 my $ref = format_ref_marker($refs, $commit);
4762                 my %ad = parse_date($co{'author_epoch'});
4763                 git_print_header_div('commit',
4764                                "<span class=\"age\">$co{'age_string'}</span>" .
4765                                esc_html($co{'title'}) . $ref,
4766                                $commit);
4767                 print "<div class=\"title_text\">\n" .
4768                       "<div class=\"log_link\">\n" .
4769                       $cgi->a({-href => href(action=>"commit", hash=>$commit)}, "commit") .
4770                       " | " .
4771                       $cgi->a({-href => href(action=>"commitdiff", hash=>$commit)}, "commitdiff") .
4772                       " | " .
4773                       $cgi->a({-href => href(action=>"tree", hash=>$commit, hash_base=>$commit)}, "tree") .
4774                       "<br/>\n" .
4775                       "</div>\n";
4776                       git_print_authorship(\%co, -tag => 'span');
4777                       print "<br/>\n</div>\n";
4778
4779                 print "<div class=\"log_body\">\n";
4780                 git_print_log($co{'comment'}, -final_empty_line=> 1);
4781                 print "</div>\n";
4782         }
4783         if ($extra) {
4784                 print "<div class=\"page_nav\">\n";
4785                 print "$extra\n";
4786                 print "</div>\n";
4787         }
4788 }
4789
4790 sub git_shortlog_body {
4791         # uses global variable $project
4792         my ($commitlist, $from, $to, $refs, $extra) = @_;
4793
4794         $from = 0 unless defined $from;
4795         $to = $#{$commitlist} if (!defined $to || $#{$commitlist} < $to);
4796
4797         print "<table class=\"shortlog\">\n";
4798         my $alternate = 1;
4799         for (my $i = $from; $i <= $to; $i++) {
4800                 my %co = %{$commitlist->[$i]};
4801                 my $commit = $co{'id'};
4802                 my $ref = format_ref_marker($refs, $commit);
4803                 if ($alternate) {
4804                         print "<tr class=\"dark\">\n";
4805                 } else {
4806                         print "<tr class=\"light\">\n";
4807                 }
4808                 $alternate ^= 1;
4809                 # git_summary() used print "<td><i>$co{'age_string'}</i></td>\n" .
4810                 print "<td title=\"$co{'age_string_age'}\"><i>$co{'age_string_date'}</i></td>\n" .
4811                       format_author_html('td', \%co, 10) . "<td>";
4812                 print format_subject_html($co{'title'}, $co{'title_short'},
4813                                           href(action=>"commit", hash=>$commit), $ref);
4814                 print "</td>\n" .
4815                       "<td class=\"link\">" .
4816                       $cgi->a({-href => href(action=>"commit", hash=>$commit)}, "commit") . " | " .
4817                       $cgi->a({-href => href(action=>"commitdiff", hash=>$commit)}, "commitdiff") . " | " .
4818                       $cgi->a({-href => href(action=>"tree", hash=>$commit, hash_base=>$commit)}, "tree");
4819                 my $snapshot_links = format_snapshot_links($commit);
4820                 if (defined $snapshot_links) {
4821                         print " | " . $snapshot_links;
4822                 }
4823                 print "</td>\n" .
4824                       "</tr>\n";
4825         }
4826         if (defined $extra) {
4827                 print "<tr>\n" .
4828                       "<td colspan=\"4\">$extra</td>\n" .
4829                       "</tr>\n";
4830         }
4831         print "</table>\n";
4832 }
4833
4834 sub git_history_body {
4835         # Warning: assumes constant type (blob or tree) during history
4836         my ($commitlist, $from, $to, $refs, $extra,
4837             $file_name, $file_hash, $ftype) = @_;
4838
4839         $from = 0 unless defined $from;
4840         $to = $#{$commitlist} unless (defined $to && $to <= $#{$commitlist});
4841
4842         print "<table class=\"history\">\n";
4843         my $alternate = 1;
4844         for (my $i = $from; $i <= $to; $i++) {
4845                 my %co = %{$commitlist->[$i]};
4846                 if (!%co) {
4847                         next;
4848                 }
4849                 my $commit = $co{'id'};
4850
4851                 my $ref = format_ref_marker($refs, $commit);
4852
4853                 if ($alternate) {
4854                         print "<tr class=\"dark\">\n";
4855                 } else {
4856                         print "<tr class=\"light\">\n";
4857                 }
4858                 $alternate ^= 1;
4859                 print "<td title=\"$co{'age_string_age'}\"><i>$co{'age_string_date'}</i></td>\n" .
4860         # shortlog:   format_author_html('td', \%co, 10)
4861                       format_author_html('td', \%co, 15, 3) . "<td>";
4862                 # originally git_history used chop_str($co{'title'}, 50)
4863                 print format_subject_html($co{'title'}, $co{'title_short'},
4864                                           href(action=>"commit", hash=>$commit), $ref);
4865                 print "</td>\n" .
4866                       "<td class=\"link\">" .
4867                       $cgi->a({-href => href(action=>$ftype, hash_base=>$commit, file_name=>$file_name)}, $ftype) . " | " .
4868                       $cgi->a({-href => href(action=>"commitdiff", hash=>$commit)}, "commitdiff");
4869
4870                 if ($ftype eq 'blob') {
4871                         my $blob_current = $file_hash;
4872                         my $blob_parent  = git_get_hash_by_path($commit, $file_name);
4873                         if (defined $blob_current && defined $blob_parent &&
4874                                         $blob_current ne $blob_parent) {
4875                                 print " | " .
4876                                         $cgi->a({-href => href(action=>"blobdiff",
4877                                                                hash=>$blob_current, hash_parent=>$blob_parent,
4878                                                                hash_base=>$hash_base, hash_parent_base=>$commit,
4879                                                                file_name=>$file_name)},
4880                                                 "diff to current");
4881                         }
4882                 }
4883                 print "</td>\n" .
4884                       "</tr>\n";
4885         }
4886         if (defined $extra) {
4887                 print "<tr>\n" .
4888                       "<td colspan=\"4\">$extra</td>\n" .
4889                       "</tr>\n";
4890         }
4891         print "</table>\n";
4892 }
4893
4894 sub git_tags_body {
4895         # uses global variable $project
4896         my ($taglist, $from, $to, $extra) = @_;
4897         $from = 0 unless defined $from;
4898         $to = $#{$taglist} if (!defined $to || $#{$taglist} < $to);
4899
4900         print "<table class=\"tags\">\n";
4901         my $alternate = 1;
4902         for (my $i = $from; $i <= $to; $i++) {
4903                 my $entry = $taglist->[$i];
4904                 my %tag = %$entry;
4905                 my $comment = $tag{'subject'};
4906                 my $comment_short;
4907                 if (defined $comment) {
4908                         $comment_short = chop_str($comment, 30, 5);
4909                 }
4910                 if ($alternate) {
4911                         print "<tr class=\"dark\">\n";
4912                 } else {
4913                         print "<tr class=\"light\">\n";
4914                 }
4915                 $alternate ^= 1;
4916                 if (defined $tag{'age'}) {
4917                         print "<td><i>$tag{'age'}</i></td>\n";
4918                 } else {
4919                         print "<td></td>\n";
4920                 }
4921                 print "<td>" .
4922                       $cgi->a({-href => href(action=>$tag{'reftype'}, hash=>$tag{'refid'}),
4923                                -class => "list name"}, esc_html($tag{'name'})) .
4924                       "</td>\n" .
4925                       "<td>";
4926                 if (defined $comment) {
4927                         print format_subject_html($comment, $comment_short,
4928                                                   href(action=>"tag", hash=>$tag{'id'}));
4929                 }
4930                 print "</td>\n" .
4931                       "<td class=\"selflink\">";
4932                 if ($tag{'type'} eq "tag") {
4933                         print $cgi->a({-href => href(action=>"tag", hash=>$tag{'id'})}, "tag");
4934                 } else {
4935                         print "&nbsp;";
4936                 }
4937                 print "</td>\n" .
4938                       "<td class=\"link\">" . " | " .
4939                       $cgi->a({-href => href(action=>$tag{'reftype'}, hash=>$tag{'refid'})}, $tag{'reftype'});
4940                 if ($tag{'reftype'} eq "commit") {
4941                         print " | " . $cgi->a({-href => href(action=>"shortlog", hash=>$tag{'fullname'})}, "shortlog") .
4942                               " | " . $cgi->a({-href => href(action=>"log", hash=>$tag{'fullname'})}, "log");
4943                 } elsif ($tag{'reftype'} eq "blob") {
4944                         print " | " . $cgi->a({-href => href(action=>"blob_plain", hash=>$tag{'refid'})}, "raw");
4945                 }
4946                 print "</td>\n" .
4947                       "</tr>";
4948         }
4949         if (defined $extra) {
4950                 print "<tr>\n" .
4951                       "<td colspan=\"5\">$extra</td>\n" .
4952                       "</tr>\n";
4953         }
4954         print "</table>\n";
4955 }
4956
4957 sub git_heads_body {
4958         # uses global variable $project
4959         my ($headlist, $head, $from, $to, $extra) = @_;
4960         $from = 0 unless defined $from;
4961         $to = $#{$headlist} if (!defined $to || $#{$headlist} < $to);
4962
4963         print "<table class=\"heads\">\n";
4964         my $alternate = 1;
4965         for (my $i = $from; $i <= $to; $i++) {
4966                 my $entry = $headlist->[$i];
4967                 my %ref = %$entry;
4968                 my $curr = $ref{'id'} eq $head;
4969                 if ($alternate) {
4970                         print "<tr class=\"dark\">\n";
4971                 } else {
4972                         print "<tr class=\"light\">\n";
4973                 }
4974                 $alternate ^= 1;
4975                 print "<td><i>$ref{'age'}</i></td>\n" .
4976                       ($curr ? "<td class=\"current_head\">" : "<td>") .
4977                       $cgi->a({-href => href(action=>"shortlog", hash=>$ref{'fullname'}),
4978                                -class => "list name"},esc_html($ref{'name'})) .
4979                       "</td>\n" .
4980                       "<td class=\"link\">" .
4981                       $cgi->a({-href => href(action=>"shortlog", hash=>$ref{'fullname'})}, "shortlog") . " | " .
4982                       $cgi->a({-href => href(action=>"log", hash=>$ref{'fullname'})}, "log") . " | " .
4983                       $cgi->a({-href => href(action=>"tree", hash=>$ref{'fullname'}, hash_base=>$ref{'name'})}, "tree") .
4984                       "</td>\n" .
4985                       "</tr>";
4986         }
4987         if (defined $extra) {
4988                 print "<tr>\n" .
4989                       "<td colspan=\"3\">$extra</td>\n" .
4990                       "</tr>\n";
4991         }
4992         print "</table>\n";
4993 }
4994
4995 sub git_search_grep_body {
4996         my ($commitlist, $from, $to, $extra) = @_;
4997         $from = 0 unless defined $from;
4998         $to = $#{$commitlist} if (!defined $to || $#{$commitlist} < $to);
4999
5000         print "<table class=\"commit_search\">\n";
5001         my $alternate = 1;
5002         for (my $i = $from; $i <= $to; $i++) {
5003                 my %co = %{$commitlist->[$i]};
5004                 if (!%co) {
5005                         next;
5006                 }
5007                 my $commit = $co{'id'};
5008                 if ($alternate) {
5009                         print "<tr class=\"dark\">\n";
5010                 } else {
5011                         print "<tr class=\"light\">\n";
5012                 }
5013                 $alternate ^= 1;
5014                 print "<td title=\"$co{'age_string_age'}\"><i>$co{'age_string_date'}</i></td>\n" .
5015                       format_author_html('td', \%co, 15, 5) .
5016                       "<td>" .
5017                       $cgi->a({-href => href(action=>"commit", hash=>$co{'id'}),
5018                                -class => "list subject"},
5019                               chop_and_escape_str($co{'title'}, 50) . "<br/>");
5020                 my $comment = $co{'comment'};
5021                 foreach my $line (@$comment) {
5022                         if ($line =~ m/^(.*?)($search_regexp)(.*)$/i) {
5023                                 my ($lead, $match, $trail) = ($1, $2, $3);
5024                                 $match = chop_str($match, 70, 5, 'center');
5025                                 my $contextlen = int((80 - length($match))/2);
5026                                 $contextlen = 30 if ($contextlen > 30);
5027                                 $lead  = chop_str($lead,  $contextlen, 10, 'left');
5028                                 $trail = chop_str($trail, $contextlen, 10, 'right');
5029
5030                                 $lead  = esc_html($lead);
5031                                 $match = esc_html($match);
5032                                 $trail = esc_html($trail);
5033
5034                                 print "$lead<span class=\"match\">$match</span>$trail<br />";
5035                         }
5036                 }
5037                 print "</td>\n" .
5038                       "<td class=\"link\">" .
5039                       $cgi->a({-href => href(action=>"commit", hash=>$co{'id'})}, "commit") .
5040                       " | " .
5041                       $cgi->a({-href => href(action=>"commitdiff", hash=>$co{'id'})}, "commitdiff") .
5042                       " | " .
5043                       $cgi->a({-href => href(action=>"tree", hash=>$co{'tree'}, hash_base=>$co{'id'})}, "tree");
5044                 print "</td>\n" .
5045                       "</tr>\n";
5046         }
5047         if (defined $extra) {
5048                 print "<tr>\n" .
5049                       "<td colspan=\"3\">$extra</td>\n" .
5050                       "</tr>\n";
5051         }
5052         print "</table>\n";
5053 }
5054
5055 ## ======================================================================
5056 ## ======================================================================
5057 ## actions
5058
5059 sub git_project_list {
5060         my $order = $input_params{'order'};
5061         if (defined $order && $order !~ m/none|project|descr|owner|age/) {
5062                 die_error(400, "Unknown order parameter");
5063         }
5064
5065         my @list = git_get_projects_list();
5066         if (!@list) {
5067                 die_error(404, "No projects found");
5068         }
5069
5070         git_header_html();
5071         if (defined $home_text && -f $home_text) {
5072                 print "<div class=\"index_include\">\n";
5073                 insert_file($home_text);
5074                 print "</div>\n";
5075         }
5076         print $cgi->startform(-method => "get") .
5077               "<p class=\"projsearch\">Search:\n" .
5078               $cgi->textfield(-name => "s", -value => $searchtext) . "\n" .
5079               "</p>" .
5080               $cgi->end_form() . "\n";
5081         git_project_list_body(\@list, $order);
5082         git_footer_html();
5083 }
5084
5085 sub git_forks {
5086         my $order = $input_params{'order'};
5087         if (defined $order && $order !~ m/none|project|descr|owner|age/) {
5088                 die_error(400, "Unknown order parameter");
5089         }
5090
5091         my @list = git_get_projects_list($project);
5092         if (!@list) {
5093                 die_error(404, "No forks found");
5094         }
5095
5096         git_header_html();
5097         git_print_page_nav('','');
5098         git_print_header_div('summary', "$project forks");
5099         git_project_list_body(\@list, $order);
5100         git_footer_html();
5101 }
5102
5103 sub git_project_index {
5104         my @projects = git_get_projects_list($project);
5105
5106         print $cgi->header(
5107                 -type => 'text/plain',
5108                 -charset => 'utf-8',
5109                 -content_disposition => 'inline; filename="index.aux"');
5110
5111         foreach my $pr (@projects) {
5112                 if (!exists $pr->{'owner'}) {
5113                         $pr->{'owner'} = git_get_project_owner("$pr->{'path'}");
5114                 }
5115
5116                 my ($path, $owner) = ($pr->{'path'}, $pr->{'owner'});
5117                 # quote as in CGI::Util::encode, but keep the slash, and use '+' for ' '
5118                 $path  =~ s/([^a-zA-Z0-9_.\-\/ ])/sprintf("%%%02X", ord($1))/eg;
5119                 $owner =~ s/([^a-zA-Z0-9_.\-\/ ])/sprintf("%%%02X", ord($1))/eg;
5120                 $path  =~ s/ /\+/g;
5121                 $owner =~ s/ /\+/g;
5122
5123                 print "$path $owner\n";
5124         }
5125 }
5126
5127 sub git_summary {
5128         my $descr = git_get_project_description($project) || "none";
5129         my %co = parse_commit("HEAD");
5130         my %cd = %co ? parse_date($co{'committer_epoch'}, $co{'committer_tz'}) : ();
5131         my $head = $co{'id'};
5132
5133         my $owner = git_get_project_owner($project);
5134
5135         my $refs = git_get_references();
5136         # These get_*_list functions return one more to allow us to see if
5137         # there are more ...
5138         my @taglist  = git_get_tags_list(16);
5139         my @headlist = git_get_heads_list(16);
5140         my @forklist;
5141         my $check_forks = gitweb_check_feature('forks');
5142
5143         if ($check_forks) {
5144                 @forklist = git_get_projects_list($project);
5145         }
5146
5147         git_header_html();
5148         git_print_page_nav('summary','', $head);
5149
5150         print "<div class=\"title\">&nbsp;</div>\n";
5151         print "<table class=\"projects_list\">\n" .
5152               "<tr id=\"metadata_desc\"><td>description</td><td>" . esc_html($descr) . "</td></tr>\n" .
5153               "<tr id=\"metadata_owner\"><td>owner</td><td>" . esc_html($owner) . "</td></tr>\n";
5154         if (defined $cd{'rfc2822'}) {
5155                 print "<tr id=\"metadata_lchange\"><td>last change</td><td>$cd{'rfc2822'}</td></tr>\n";
5156         }
5157
5158         # use per project git URL list in $projectroot/$project/cloneurl
5159         # or make project git URL from git base URL and project name
5160         my $url_tag = "URL";
5161         my @url_list = git_get_project_url_list($project);
5162         @url_list = map { "$_/$project" } @git_base_url_list unless @url_list;
5163         foreach my $git_url (@url_list) {
5164                 next unless $git_url;
5165                 print "<tr class=\"metadata_url\"><td>$url_tag</td><td>$git_url</td></tr>\n";
5166                 $url_tag = "";
5167         }
5168
5169         # Tag cloud
5170         my $show_ctags = gitweb_check_feature('ctags');
5171         if ($show_ctags) {
5172                 my $ctags = git_get_project_ctags($project);
5173                 my $cloud = git_populate_project_tagcloud($ctags);
5174                 print "<tr id=\"metadata_ctags\"><td>Content tags:<br />";
5175                 print "</td>\n<td>" unless %$ctags;
5176                 print "<form action=\"$show_ctags\" method=\"post\"><input type=\"hidden\" name=\"p\" value=\"$project\" />Add: <input type=\"text\" name=\"t\" size=\"8\" /></form>";
5177                 print "</td>\n<td>" if %$ctags;
5178                 print git_show_project_tagcloud($cloud, 48);
5179                 print "</td></tr>";
5180         }
5181
5182         print "</table>\n";
5183
5184         # If XSS prevention is on, we don't include README.html.
5185         # TODO: Allow a readme in some safe format.
5186         if (!$prevent_xss && -s "$projectroot/$project/README.html") {
5187                 print "<div class=\"title\">readme</div>\n" .
5188                       "<div class=\"readme\">\n";
5189                 insert_file("$projectroot/$project/README.html");
5190                 print "\n</div>\n"; # class="readme"
5191         }
5192
5193         # we need to request one more than 16 (0..15) to check if
5194         # those 16 are all
5195         my @commitlist = $head ? parse_commits($head, 17) : ();
5196         if (@commitlist) {
5197                 git_print_header_div('shortlog');
5198                 git_shortlog_body(\@commitlist, 0, 15, $refs,
5199                                   $#commitlist <=  15 ? undef :
5200                                   $cgi->a({-href => href(action=>"shortlog")}, "..."));
5201         }
5202
5203         if (@taglist) {
5204                 git_print_header_div('tags');
5205                 git_tags_body(\@taglist, 0, 15,
5206                               $#taglist <=  15 ? undef :
5207                               $cgi->a({-href => href(action=>"tags")}, "..."));
5208         }
5209
5210         if (@headlist) {
5211                 git_print_header_div('heads');
5212                 git_heads_body(\@headlist, $head, 0, 15,
5213                                $#headlist <= 15 ? undef :
5214                                $cgi->a({-href => href(action=>"heads")}, "..."));
5215         }
5216
5217         if (@forklist) {
5218                 git_print_header_div('forks');
5219                 git_project_list_body(\@forklist, 'age', 0, 15,
5220                                       $#forklist <= 15 ? undef :
5221                                       $cgi->a({-href => href(action=>"forks")}, "..."),
5222                                       'no_header');
5223         }
5224
5225         git_footer_html();
5226 }
5227
5228 sub git_tag {
5229         my %tag = parse_tag($hash);
5230
5231         if (! %tag) {
5232                 die_error(404, "Unknown tag object");
5233         }
5234
5235         my $head = git_get_head_hash($project);
5236         git_header_html();
5237         git_print_page_nav('','', $head,undef,$head);
5238         git_print_header_div('commit', esc_html($tag{'name'}), $hash);
5239         print "<div class=\"title_text\">\n" .
5240               "<table class=\"object_header\">\n" .
5241               "<tr>\n" .
5242               "<td>object</td>\n" .
5243               "<td>" . $cgi->a({-class => "list", -href => href(action=>$tag{'type'}, hash=>$tag{'object'})},
5244                                $tag{'object'}) . "</td>\n" .
5245               "<td class=\"link\">" . $cgi->a({-href => href(action=>$tag{'type'}, hash=>$tag{'object'})},
5246                                               $tag{'type'}) . "</td>\n" .
5247               "</tr>\n";
5248         if (defined($tag{'author'})) {
5249                 git_print_authorship_rows(\%tag, 'author');
5250         }
5251         print "</table>\n\n" .
5252               "</div>\n";
5253         print "<div class=\"page_body\">";
5254         my $comment = $tag{'comment'};
5255         foreach my $line (@$comment) {
5256                 chomp $line;
5257                 print esc_html($line, -nbsp=>1) . "<br/>\n";
5258         }
5259         print "</div>\n";
5260         git_footer_html();
5261 }
5262
5263 sub git_blame_common {
5264         my $format = shift || 'porcelain';
5265         if ($format eq 'porcelain' && $cgi->param('js')) {
5266                 $format = 'incremental';
5267                 $action = 'blame_incremental'; # for page title etc
5268         }
5269
5270         # permissions
5271         gitweb_check_feature('blame')
5272                 or die_error(403, "Blame view not allowed");
5273
5274         # error checking
5275         die_error(400, "No file name given") unless $file_name;
5276         $hash_base ||= git_get_head_hash($project);
5277         die_error(404, "Couldn't find base commit") unless $hash_base;
5278         my %co = parse_commit($hash_base)
5279                 or die_error(404, "Commit not found");
5280         my $ftype = "blob";
5281         if (!defined $hash) {
5282                 $hash = git_get_hash_by_path($hash_base, $file_name, "blob")
5283                         or die_error(404, "Error looking up file");
5284         } else {
5285                 $ftype = git_get_type($hash);
5286                 if ($ftype !~ "blob") {
5287                         die_error(400, "Object is not a blob");
5288                 }
5289         }
5290
5291         my $fd;
5292         if ($format eq 'incremental') {
5293                 # get file contents (as base)
5294                 open $fd, "-|", git_cmd(), 'cat-file', 'blob', $hash
5295                         or die_error(500, "Open git-cat-file failed");
5296         } elsif ($format eq 'data') {
5297                 # run git-blame --incremental
5298                 open $fd, "-|", git_cmd(), "blame", "--incremental",
5299                         $hash_base, "--", $file_name
5300                         or die_error(500, "Open git-blame --incremental failed");
5301         } else {
5302                 # run git-blame --porcelain
5303                 open $fd, "-|", git_cmd(), "blame", '-p',
5304                         $hash_base, '--', $file_name
5305                         or die_error(500, "Open git-blame --porcelain failed");
5306         }
5307
5308         # incremental blame data returns early
5309         if ($format eq 'data') {
5310                 print $cgi->header(
5311                         -type=>"text/plain", -charset => "utf-8",
5312                         -status=> "200 OK");
5313                 local $| = 1; # output autoflush
5314                 print while <$fd>;
5315                 close $fd
5316                         or print "ERROR $!\n";
5317
5318                 print 'END';
5319                 if (defined $t0 && gitweb_check_feature('timed')) {
5320                         print ' '.
5321                               Time::HiRes::tv_interval($t0, [Time::HiRes::gettimeofday()]).
5322                               ' '.$number_of_git_cmds;
5323                 }
5324                 print "\n";
5325
5326                 return;
5327         }
5328
5329         # page header
5330         git_header_html();
5331         my $formats_nav =
5332                 $cgi->a({-href => href(action=>"blob", -replay=>1)},
5333                         "blob") .
5334                 " | ";
5335         if ($format eq 'incremental') {
5336                 $formats_nav .=
5337                         $cgi->a({-href => href(action=>"blame", javascript=>0, -replay=>1)},
5338                                 "blame") . " (non-incremental)";
5339         } else {
5340                 $formats_nav .=
5341                         $cgi->a({-href => href(action=>"blame_incremental", -replay=>1)},
5342                                 "blame") . " (incremental)";
5343         }
5344         $formats_nav .=
5345                 " | " .
5346                 $cgi->a({-href => href(action=>"history", -replay=>1)},
5347                         "history") .
5348                 " | " .
5349                 $cgi->a({-href => href(action=>$action, file_name=>$file_name)},
5350                         "HEAD");
5351         git_print_page_nav('','', $hash_base,$co{'tree'},$hash_base, $formats_nav);
5352         git_print_header_div('commit', esc_html($co{'title'}), $hash_base);
5353         git_print_page_path($file_name, $ftype, $hash_base);
5354
5355         # page body
5356         if ($format eq 'incremental') {
5357                 print "<noscript>\n<div class=\"error\"><center><b>\n".
5358                       "This page requires JavaScript to run.\n Use ".
5359                       $cgi->a({-href => href(action=>'blame',javascript=>0,-replay=>1)},
5360                               'this page').
5361                       " instead.\n".
5362                       "</b></center></div>\n</noscript>\n";
5363
5364                 print qq!<div id="progress_bar" style="width: 100%; background-color: yellow"></div>\n!;
5365         }
5366
5367         print qq!<div class="page_body">\n!;
5368         print qq!<div id="progress_info">... / ...</div>\n!
5369                 if ($format eq 'incremental');
5370         print qq!<table id="blame_table" class="blame" width="100%">\n!.
5371               #qq!<col width="5.5em" /><col width="2.5em" /><col width="*" />\n!.
5372               qq!<thead>\n!.
5373               qq!<tr><th>Commit</th><th>Line</th><th>Data</th></tr>\n!.
5374               qq!</thead>\n!.
5375               qq!<tbody>\n!;
5376
5377         my @rev_color = qw(light dark);
5378         my $num_colors = scalar(@rev_color);
5379         my $current_color = 0;
5380
5381         if ($format eq 'incremental') {
5382                 my $color_class = $rev_color[$current_color];
5383
5384                 #contents of a file
5385                 my $linenr = 0;
5386         LINE:
5387                 while (my $line = <$fd>) {
5388                         chomp $line;
5389                         $linenr++;
5390
5391                         print qq!<tr id="l$linenr" class="$color_class">!.
5392                               qq!<td class="sha1"><a href=""> </a></td>!.
5393                               qq!<td class="linenr">!.
5394                               qq!<a class="linenr" href="">$linenr</a></td>!;
5395                         print qq!<td class="pre">! . esc_html($line) . "</td>\n";
5396                         print qq!</tr>\n!;
5397                 }
5398
5399         } else { # porcelain, i.e. ordinary blame
5400                 my %metainfo = (); # saves information about commits
5401
5402                 # blame data
5403         LINE:
5404                 while (my $line = <$fd>) {
5405                         chomp $line;
5406                         # the header: <SHA-1> <src lineno> <dst lineno> [<lines in group>]
5407                         # no <lines in group> for subsequent lines in group of lines
5408                         my ($full_rev, $orig_lineno, $lineno, $group_size) =
5409                            ($line =~ /^([0-9a-f]{40}) (\d+) (\d+)(?: (\d+))?$/);
5410                         if (!exists $metainfo{$full_rev}) {
5411                                 $metainfo{$full_rev} = { 'nprevious' => 0 };
5412                         }
5413                         my $meta = $metainfo{$full_rev};
5414                         my $data;
5415                         while ($data = <$fd>) {
5416                                 chomp $data;
5417                                 last if ($data =~ s/^\t//); # contents of line
5418                                 if ($data =~ /^(\S+)(?: (.*))?$/) {
5419                                         $meta->{$1} = $2 unless exists $meta->{$1};
5420                                 }
5421                                 if ($data =~ /^previous /) {
5422                                         $meta->{'nprevious'}++;
5423                                 }
5424                         }
5425                         my $short_rev = substr($full_rev, 0, 8);
5426                         my $author = $meta->{'author'};
5427                         my %date =
5428                                 parse_date($meta->{'author-time'}, $meta->{'author-tz'});
5429                         my $date = $date{'iso-tz'};
5430                         if ($group_size) {
5431                                 $current_color = ($current_color + 1) % $num_colors;
5432                         }
5433                         my $tr_class = $rev_color[$current_color];
5434                         $tr_class .= ' boundary' if (exists $meta->{'boundary'});
5435                         $tr_class .= ' no-previous' if ($meta->{'nprevious'} == 0);
5436                         $tr_class .= ' multiple-previous' if ($meta->{'nprevious'} > 1);
5437                         print "<tr id=\"l$lineno\" class=\"$tr_class\">\n";
5438                         if ($group_size) {
5439                                 print "<td class=\"sha1\"";
5440                                 print " title=\"". esc_html($author) . ", $date\"";
5441                                 print " rowspan=\"$group_size\"" if ($group_size > 1);
5442                                 print ">";
5443                                 print $cgi->a({-href => href(action=>"commit",
5444                                                              hash=>$full_rev,
5445                                                              file_name=>$file_name)},
5446                                               esc_html($short_rev));
5447                                 if ($group_size >= 2) {
5448                                         my @author_initials = ($author =~ /\b([[:upper:]])\B/g);
5449                                         if (@author_initials) {
5450                                                 print "<br />" .
5451                                                       esc_html(join('', @author_initials));
5452                                                 #           or join('.', ...)
5453                                         }
5454                                 }
5455                                 print "</td>\n";
5456                         }
5457                         # 'previous' <sha1 of parent commit> <filename at commit>
5458                         if (exists $meta->{'previous'} &&
5459                             $meta->{'previous'} =~ /^([a-fA-F0-9]{40}) (.*)$/) {
5460                                 $meta->{'parent'} = $1;
5461                                 $meta->{'file_parent'} = unquote($2);
5462                         }
5463                         my $linenr_commit =
5464                                 exists($meta->{'parent'}) ?
5465                                 $meta->{'parent'} : $full_rev;
5466                         my $linenr_filename =
5467                                 exists($meta->{'file_parent'}) ?
5468                                 $meta->{'file_parent'} : unquote($meta->{'filename'});
5469                         my $blamed = href(action => 'blame',
5470                                           file_name => $linenr_filename,
5471                                           hash_base => $linenr_commit);
5472                         print "<td class=\"linenr\">";
5473                         print $cgi->a({ -href => "$blamed#l$orig_lineno",
5474                                         -class => "linenr" },
5475                                       esc_html($lineno));
5476                         print "</td>";
5477                         print "<td class=\"pre\">" . esc_html($data) . "</td>\n";
5478                         print "</tr>\n";
5479                 } # end while
5480
5481         }
5482
5483         # footer
5484         print "</tbody>\n".
5485               "</table>\n"; # class="blame"
5486         print "</div>\n";   # class="blame_body"
5487         close $fd
5488                 or print "Reading blob failed\n";
5489
5490         git_footer_html();
5491 }
5492
5493 sub git_blame {
5494         git_blame_common();
5495 }
5496
5497 sub git_blame_incremental {
5498         git_blame_common('incremental');
5499 }
5500
5501 sub git_blame_data {
5502         git_blame_common('data');
5503 }
5504
5505 sub git_tags {
5506         my $head = git_get_head_hash($project);
5507         git_header_html();
5508         git_print_page_nav('','', $head,undef,$head);
5509         git_print_header_div('summary', $project);
5510
5511         my @tagslist = git_get_tags_list();
5512         if (@tagslist) {
5513                 git_tags_body(\@tagslist);
5514         }
5515         git_footer_html();
5516 }
5517
5518 sub git_heads {
5519         my $head = git_get_head_hash($project);
5520         git_header_html();
5521         git_print_page_nav('','', $head,undef,$head);
5522         git_print_header_div('summary', $project);
5523
5524         my @headslist = git_get_heads_list();
5525         if (@headslist) {
5526                 git_heads_body(\@headslist, $head);
5527         }
5528         git_footer_html();
5529 }
5530
5531 sub git_blob_plain {
5532         my $type = shift;
5533         my $expires;
5534
5535         if (!defined $hash) {
5536                 if (defined $file_name) {
5537                         my $base = $hash_base || git_get_head_hash($project);
5538                         $hash = git_get_hash_by_path($base, $file_name, "blob")
5539                                 or die_error(404, "Cannot find file");
5540                 } else {
5541                         die_error(400, "No file name defined");
5542                 }
5543         } elsif ($hash =~ m/^[0-9a-fA-F]{40}$/) {
5544                 # blobs defined by non-textual hash id's can be cached
5545                 $expires = "+1d";
5546         }
5547
5548         open my $fd, "-|", git_cmd(), "cat-file", "blob", $hash
5549                 or die_error(500, "Open git-cat-file blob '$hash' failed");
5550
5551         # content-type (can include charset)
5552         $type = blob_contenttype($fd, $file_name, $type);
5553
5554         # "save as" filename, even when no $file_name is given
5555         my $save_as = "$hash";
5556         if (defined $file_name) {
5557                 $save_as = $file_name;
5558         } elsif ($type =~ m/^text\//) {
5559                 $save_as .= '.txt';
5560         }
5561
5562         # With XSS prevention on, blobs of all types except a few known safe
5563         # ones are served with "Content-Disposition: attachment" to make sure
5564         # they don't run in our security domain.  For certain image types,
5565         # blob view writes an <img> tag referring to blob_plain view, and we
5566         # want to be sure not to break that by serving the image as an
5567         # attachment (though Firefox 3 doesn't seem to care).
5568         my $sandbox = $prevent_xss &&
5569                 $type !~ m!^(?:text/plain|image/(?:gif|png|jpeg))$!;
5570
5571         print $cgi->header(
5572                 -type => $type,
5573                 -expires => $expires,
5574                 -content_disposition =>
5575                         ($sandbox ? 'attachment' : 'inline')
5576                         . '; filename="' . $save_as . '"');
5577         local $/ = undef;
5578         binmode STDOUT, ':raw';
5579         print <$fd>;
5580         binmode STDOUT, ':utf8'; # as set at the beginning of gitweb.cgi
5581         close $fd;
5582 }
5583
5584 sub git_blob {
5585         my $expires;
5586
5587         if (!defined $hash) {
5588                 if (defined $file_name) {
5589                         my $base = $hash_base || git_get_head_hash($project);
5590                         $hash = git_get_hash_by_path($base, $file_name, "blob")
5591                                 or die_error(404, "Cannot find file");
5592                 } else {
5593                         die_error(400, "No file name defined");
5594                 }
5595         } elsif ($hash =~ m/^[0-9a-fA-F]{40}$/) {
5596                 # blobs defined by non-textual hash id's can be cached
5597                 $expires = "+1d";
5598         }
5599
5600         my $have_blame = gitweb_check_feature('blame');
5601         open my $fd, "-|", git_cmd(), "cat-file", "blob", $hash
5602                 or die_error(500, "Couldn't cat $file_name, $hash");
5603         my $mimetype = blob_mimetype($fd, $file_name);
5604         # use 'blob_plain' (aka 'raw') view for files that cannot be displayed
5605         if ($mimetype !~ m!^(?:text/|image/(?:gif|png|jpeg)$)! && -B $fd) {
5606                 close $fd;
5607                 return git_blob_plain($mimetype);
5608         }
5609         # we can have blame only for text/* mimetype
5610         $have_blame &&= ($mimetype =~ m!^text/!);
5611
5612         my $highlight = gitweb_check_feature('highlight');
5613         my $syntax = guess_file_syntax($highlight, $mimetype, $file_name);
5614         $fd = run_highlighter($fd, $highlight, $syntax)
5615                 if $syntax;
5616
5617         git_header_html(undef, $expires);
5618         my $formats_nav = '';
5619         if (defined $hash_base && (my %co = parse_commit($hash_base))) {
5620                 if (defined $file_name) {
5621                         if ($have_blame) {
5622                                 $formats_nav .=
5623                                         $cgi->a({-href => href(action=>"blame", -replay=>1)},
5624                                                 "blame") .
5625                                         " | ";
5626                         }
5627                         $formats_nav .=
5628                                 $cgi->a({-href => href(action=>"history", -replay=>1)},
5629                                         "history") .
5630                                 " | " .
5631                                 $cgi->a({-href => href(action=>"blob_plain", -replay=>1)},
5632                                         "raw") .
5633                                 " | " .
5634                                 $cgi->a({-href => href(action=>"blob",
5635                                                        hash_base=>"HEAD", file_name=>$file_name)},
5636                                         "HEAD");
5637                 } else {
5638                         $formats_nav .=
5639                                 $cgi->a({-href => href(action=>"blob_plain", -replay=>1)},
5640                                         "raw");
5641                 }
5642                 git_print_page_nav('','', $hash_base,$co{'tree'},$hash_base, $formats_nav);
5643                 git_print_header_div('commit', esc_html($co{'title'}), $hash_base);
5644         } else {
5645                 print "<div class=\"page_nav\">\n" .
5646                       "<br/><br/></div>\n" .
5647                       "<div class=\"title\">$hash</div>\n";
5648         }
5649         git_print_page_path($file_name, "blob", $hash_base);
5650         print "<div class=\"page_body\">\n";
5651         if ($mimetype =~ m!^image/!) {
5652                 print qq!<img type="$mimetype"!;
5653                 if ($file_name) {
5654                         print qq! alt="$file_name" title="$file_name"!;
5655                 }
5656                 print qq! src="! .
5657                       href(action=>"blob_plain", hash=>$hash,
5658                            hash_base=>$hash_base, file_name=>$file_name) .
5659                       qq!" />\n!;
5660         } else {
5661                 my $nr;
5662                 while (my $line = <$fd>) {
5663                         chomp $line;
5664                         $nr++;
5665                         $line = untabify($line);
5666                         printf qq!<div class="pre"><a id="l%i" href="%s#l%i" class="linenr">%4i</a> %s</div>\n!,
5667                                $nr, href(-replay => 1), $nr, $nr, $syntax ? $line : esc_html($line, -nbsp=>1);
5668                 }
5669         }
5670         close $fd
5671                 or print "Reading blob failed.\n";
5672         print "</div>";
5673         git_footer_html();
5674 }
5675
5676 sub git_tree {
5677         if (!defined $hash_base) {
5678                 $hash_base = "HEAD";
5679         }
5680         if (!defined $hash) {
5681                 if (defined $file_name) {
5682                         $hash = git_get_hash_by_path($hash_base, $file_name, "tree");
5683                 } else {
5684                         $hash = $hash_base;
5685                 }
5686         }
5687         die_error(404, "No such tree") unless defined($hash);
5688
5689         my $show_sizes = gitweb_check_feature('show-sizes');
5690         my $have_blame = gitweb_check_feature('blame');
5691
5692         my @entries = ();
5693         {
5694                 local $/ = "\0";
5695                 open my $fd, "-|", git_cmd(), "ls-tree", '-z',
5696                         ($show_sizes ? '-l' : ()), @extra_options, $hash
5697                         or die_error(500, "Open git-ls-tree failed");
5698                 @entries = map { chomp; $_ } <$fd>;
5699                 close $fd
5700                         or die_error(404, "Reading tree failed");
5701         }
5702
5703         my $refs = git_get_references();
5704         my $ref = format_ref_marker($refs, $hash_base);
5705         git_header_html();
5706         my $basedir = '';
5707         if (defined $hash_base && (my %co = parse_commit($hash_base))) {
5708                 my @views_nav = ();
5709                 if (defined $file_name) {
5710                         push @views_nav,
5711                                 $cgi->a({-href => href(action=>"history", -replay=>1)},
5712                                         "history"),
5713                                 $cgi->a({-href => href(action=>"tree",
5714                                                        hash_base=>"HEAD", file_name=>$file_name)},
5715                                         "HEAD"),
5716                 }
5717                 my $snapshot_links = format_snapshot_links($hash);
5718                 if (defined $snapshot_links) {
5719                         # FIXME: Should be available when we have no hash base as well.
5720                         push @views_nav, $snapshot_links;
5721                 }
5722                 git_print_page_nav('tree','', $hash_base, undef, undef,
5723                                    join(' | ', @views_nav));
5724                 git_print_header_div('commit', esc_html($co{'title'}) . $ref, $hash_base);
5725         } else {
5726                 undef $hash_base;
5727                 print "<div class=\"page_nav\">\n";
5728                 print "<br/><br/></div>\n";
5729                 print "<div class=\"title\">$hash</div>\n";
5730         }
5731         if (defined $file_name) {
5732                 $basedir = $file_name;
5733                 if ($basedir ne '' && substr($basedir, -1) ne '/') {
5734                         $basedir .= '/';
5735                 }
5736                 git_print_page_path($file_name, 'tree', $hash_base);
5737         }
5738         print "<div class=\"page_body\">\n";
5739         print "<table class=\"tree\">\n";
5740         my $alternate = 1;
5741         # '..' (top directory) link if possible
5742         if (defined $hash_base &&
5743             defined $file_name && $file_name =~ m![^/]+$!) {
5744                 if ($alternate) {
5745                         print "<tr class=\"dark\">\n";
5746                 } else {
5747                         print "<tr class=\"light\">\n";
5748                 }
5749                 $alternate ^= 1;
5750
5751                 my $up = $file_name;
5752                 $up =~ s!/?[^/]+$!!;
5753                 undef $up unless $up;
5754                 # based on git_print_tree_entry
5755                 print '<td class="mode">' . mode_str('040000') . "</td>\n";
5756                 print '<td class="size">&nbsp;</td>'."\n" if $show_sizes;
5757                 print '<td class="list">';
5758                 print $cgi->a({-href => href(action=>"tree",
5759                                              hash_base=>$hash_base,
5760                                              file_name=>$up)},
5761                               "..");
5762                 print "</td>\n";
5763                 print "<td class=\"link\"></td>\n";
5764
5765                 print "</tr>\n";
5766         }
5767         foreach my $line (@entries) {
5768                 my %t = parse_ls_tree_line($line, -z => 1, -l => $show_sizes);
5769
5770                 if ($alternate) {
5771                         print "<tr class=\"dark\">\n";
5772                 } else {
5773                         print "<tr class=\"light\">\n";
5774                 }
5775                 $alternate ^= 1;
5776
5777                 git_print_tree_entry(\%t, $basedir, $hash_base, $have_blame);
5778
5779                 print "</tr>\n";
5780         }
5781         print "</table>\n" .
5782               "</div>";
5783         git_footer_html();
5784 }
5785
5786 sub snapshot_name {
5787         my ($project, $hash) = @_;
5788
5789         # path/to/project.git  -> project
5790         # path/to/project/.git -> project
5791         my $name = to_utf8($project);
5792         $name =~ s,([^/])/*\.git$,$1,;
5793         $name = basename($name);
5794         # sanitize name
5795         $name =~ s/[[:cntrl:]]/?/g;
5796
5797         my $ver = $hash;
5798         if ($hash =~ /^[0-9a-fA-F]+$/) {
5799                 # shorten SHA-1 hash
5800                 my $full_hash = git_get_full_hash($project, $hash);
5801                 if ($full_hash =~ /^$hash/ && length($hash) > 7) {
5802                         $ver = git_get_short_hash($project, $hash);
5803                 }
5804         } elsif ($hash =~ m!^refs/tags/(.*)$!) {
5805                 # tags don't need shortened SHA-1 hash
5806                 $ver = $1;
5807         } else {
5808                 # branches and other need shortened SHA-1 hash
5809                 if ($hash =~ m!^refs/(?:heads|remotes)/(.*)$!) {
5810                         $ver = $1;
5811                 }
5812                 $ver .= '-' . git_get_short_hash($project, $hash);
5813         }
5814         # in case of hierarchical branch names
5815         $ver =~ s!/!.!g;
5816
5817         # name = project-version_string
5818         $name = "$name-$ver";
5819
5820         return wantarray ? ($name, $name) : $name;
5821 }
5822
5823 sub git_snapshot {
5824         my $format = $input_params{'snapshot_format'};
5825         if (!@snapshot_fmts) {
5826                 die_error(403, "Snapshots not allowed");
5827         }
5828         # default to first supported snapshot format
5829         $format ||= $snapshot_fmts[0];
5830         if ($format !~ m/^[a-z0-9]+$/) {
5831                 die_error(400, "Invalid snapshot format parameter");
5832         } elsif (!exists($known_snapshot_formats{$format})) {
5833                 die_error(400, "Unknown snapshot format");
5834         } elsif ($known_snapshot_formats{$format}{'disabled'}) {
5835                 die_error(403, "Snapshot format not allowed");
5836         } elsif (!grep($_ eq $format, @snapshot_fmts)) {
5837                 die_error(403, "Unsupported snapshot format");
5838         }
5839
5840         my $type = git_get_type("$hash^{}");
5841         if (!$type) {
5842                 die_error(404, 'Object does not exist');
5843         }  elsif ($type eq 'blob') {
5844                 die_error(400, 'Object is not a tree-ish');
5845         }
5846
5847         my ($name, $prefix) = snapshot_name($project, $hash);
5848         my $filename = "$name$known_snapshot_formats{$format}{'suffix'}";
5849         my $cmd = quote_command(
5850                 git_cmd(), 'archive',
5851                 "--format=$known_snapshot_formats{$format}{'format'}",
5852                 "--prefix=$prefix/", $hash);
5853         if (exists $known_snapshot_formats{$format}{'compressor'}) {
5854                 $cmd .= ' | ' . quote_command(@{$known_snapshot_formats{$format}{'compressor'}});
5855         }
5856
5857         $filename =~ s/(["\\])/\\$1/g;
5858         print $cgi->header(
5859                 -type => $known_snapshot_formats{$format}{'type'},
5860                 -content_disposition => 'inline; filename="' . $filename . '"',
5861                 -status => '200 OK');
5862
5863         open my $fd, "-|", $cmd
5864                 or die_error(500, "Execute git-archive failed");
5865         binmode STDOUT, ':raw';
5866         print <$fd>;
5867         binmode STDOUT, ':utf8'; # as set at the beginning of gitweb.cgi
5868         close $fd;
5869 }
5870
5871 sub git_log_generic {
5872         my ($fmt_name, $body_subr, $base, $parent, $file_name, $file_hash) = @_;
5873
5874         my $head = git_get_head_hash($project);
5875         if (!defined $base) {
5876                 $base = $head;
5877         }
5878         if (!defined $page) {
5879                 $page = 0;
5880         }
5881         my $refs = git_get_references();
5882
5883         my $commit_hash = $base;
5884         if (defined $parent) {
5885                 $commit_hash = "$parent..$base";
5886         }
5887         my @commitlist =
5888                 parse_commits($commit_hash, 101, (100 * $page),
5889                               defined $file_name ? ($file_name, "--full-history") : ());
5890
5891         my $ftype;
5892         if (!defined $file_hash && defined $file_name) {
5893                 # some commits could have deleted file in question,
5894                 # and not have it in tree, but one of them has to have it
5895                 for (my $i = 0; $i < @commitlist; $i++) {
5896                         $file_hash = git_get_hash_by_path($commitlist[$i]{'id'}, $file_name);
5897                         last if defined $file_hash;
5898                 }
5899         }
5900         if (defined $file_hash) {
5901                 $ftype = git_get_type($file_hash);
5902         }
5903         if (defined $file_name && !defined $ftype) {
5904                 die_error(500, "Unknown type of object");
5905         }
5906         my %co;
5907         if (defined $file_name) {
5908                 %co = parse_commit($base)
5909                         or die_error(404, "Unknown commit object");
5910         }
5911
5912
5913         my $paging_nav = format_paging_nav($fmt_name, $page, $#commitlist >= 100);
5914         my $next_link = '';
5915         if ($#commitlist >= 100) {
5916                 $next_link =
5917                         $cgi->a({-href => href(-replay=>1, page=>$page+1),
5918                                  -accesskey => "n", -title => "Alt-n"}, "next");
5919         }
5920         my $patch_max = gitweb_get_feature('patches');
5921         if ($patch_max && !defined $file_name) {
5922                 if ($patch_max < 0 || @commitlist <= $patch_max) {
5923                         $paging_nav .= " &sdot; " .
5924                                 $cgi->a({-href => href(action=>"patches", -replay=>1)},
5925                                         "patches");
5926                 }
5927         }
5928
5929         git_header_html();
5930         git_print_page_nav($fmt_name,'', $hash,$hash,$hash, $paging_nav);
5931         if (defined $file_name) {
5932                 git_print_header_div('commit', esc_html($co{'title'}), $base);
5933         } else {
5934                 git_print_header_div('summary', $project)
5935         }
5936         git_print_page_path($file_name, $ftype, $hash_base)
5937                 if (defined $file_name);
5938
5939         $body_subr->(\@commitlist, 0, 99, $refs, $next_link,
5940                      $file_name, $file_hash, $ftype);
5941
5942         git_footer_html();
5943 }
5944
5945 sub git_log {
5946         git_log_generic('log', \&git_log_body,
5947                         $hash, $hash_parent);
5948 }
5949
5950 sub git_commit {
5951         $hash ||= $hash_base || "HEAD";
5952         my %co = parse_commit($hash)
5953             or die_error(404, "Unknown commit object");
5954
5955         my $parent  = $co{'parent'};
5956         my $parents = $co{'parents'}; # listref
5957
5958         # we need to prepare $formats_nav before any parameter munging
5959         my $formats_nav;
5960         if (!defined $parent) {
5961                 # --root commitdiff
5962                 $formats_nav .= '(initial)';
5963         } elsif (@$parents == 1) {
5964                 # single parent commit
5965                 $formats_nav .=
5966                         '(parent: ' .
5967                         $cgi->a({-href => href(action=>"commit",
5968                                                hash=>$parent)},
5969                                 esc_html(substr($parent, 0, 7))) .
5970                         ')';
5971         } else {
5972                 # merge commit
5973                 $formats_nav .=
5974                         '(merge: ' .
5975                         join(' ', map {
5976                                 $cgi->a({-href => href(action=>"commit",
5977                                                        hash=>$_)},
5978                                         esc_html(substr($_, 0, 7)));
5979                         } @$parents ) .
5980                         ')';
5981         }
5982         if (gitweb_check_feature('patches') && @$parents <= 1) {
5983                 $formats_nav .= " | " .
5984                         $cgi->a({-href => href(action=>"patch", -replay=>1)},
5985                                 "patch");
5986         }
5987
5988         if (!defined $parent) {
5989                 $parent = "--root";
5990         }
5991         my @difftree;
5992         open my $fd, "-|", git_cmd(), "diff-tree", '-r', "--no-commit-id",
5993                 @diff_opts,
5994                 (@$parents <= 1 ? $parent : '-c'),
5995                 $hash, "--"
5996                 or die_error(500, "Open git-diff-tree failed");
5997         @difftree = map { chomp; $_ } <$fd>;
5998         close $fd or die_error(404, "Reading git-diff-tree failed");
5999
6000         # non-textual hash id's can be cached
6001         my $expires;
6002         if ($hash =~ m/^[0-9a-fA-F]{40}$/) {
6003                 $expires = "+1d";
6004         }
6005         my $refs = git_get_references();
6006         my $ref = format_ref_marker($refs, $co{'id'});
6007
6008         git_header_html(undef, $expires);
6009         git_print_page_nav('commit', '',
6010                            $hash, $co{'tree'}, $hash,
6011                            $formats_nav);
6012
6013         if (defined $co{'parent'}) {
6014                 git_print_header_div('commitdiff', esc_html($co{'title'}) . $ref, $hash);
6015         } else {
6016                 git_print_header_div('tree', esc_html($co{'title'}) . $ref, $co{'tree'}, $hash);
6017         }
6018         print "<div class=\"title_text\">\n" .
6019               "<table class=\"object_header\">\n";
6020         git_print_authorship_rows(\%co);
6021         print "<tr><td>commit</td><td class=\"sha1\">$co{'id'}</td></tr>\n";
6022         print "<tr>" .
6023               "<td>tree</td>" .
6024               "<td class=\"sha1\">" .
6025               $cgi->a({-href => href(action=>"tree", hash=>$co{'tree'}, hash_base=>$hash),
6026                        class => "list"}, $co{'tree'}) .
6027               "</td>" .
6028               "<td class=\"link\">" .
6029               $cgi->a({-href => href(action=>"tree", hash=>$co{'tree'}, hash_base=>$hash)},
6030                       "tree");
6031         my $snapshot_links = format_snapshot_links($hash);
6032         if (defined $snapshot_links) {
6033                 print " | " . $snapshot_links;
6034         }
6035         print "</td>" .
6036               "</tr>\n";
6037
6038         foreach my $par (@$parents) {
6039                 print "<tr>" .
6040                       "<td>parent</td>" .
6041                       "<td class=\"sha1\">" .
6042                       $cgi->a({-href => href(action=>"commit", hash=>$par),
6043                                class => "list"}, $par) .
6044                       "</td>" .
6045                       "<td class=\"link\">" .
6046                       $cgi->a({-href => href(action=>"commit", hash=>$par)}, "commit") .
6047                       " | " .
6048                       $cgi->a({-href => href(action=>"commitdiff", hash=>$hash, hash_parent=>$par)}, "diff") .
6049                       "</td>" .
6050                       "</tr>\n";
6051         }
6052         print "</table>".
6053               "</div>\n";
6054
6055         print "<div class=\"page_body\">\n";
6056         git_print_log($co{'comment'});
6057         print "</div>\n";
6058
6059         git_difftree_body(\@difftree, $hash, @$parents);
6060
6061         git_footer_html();
6062 }
6063
6064 sub git_object {
6065         # object is defined by:
6066         # - hash or hash_base alone
6067         # - hash_base and file_name
6068         my $type;
6069
6070         # - hash or hash_base alone
6071         if ($hash || ($hash_base && !defined $file_name)) {
6072                 my $object_id = $hash || $hash_base;
6073
6074                 open my $fd, "-|", quote_command(
6075                         git_cmd(), 'cat-file', '-t', $object_id) . ' 2> /dev/null'
6076                         or die_error(404, "Object does not exist");
6077                 $type = <$fd>;
6078                 chomp $type;
6079                 close $fd
6080                         or die_error(404, "Object does not exist");
6081
6082         # - hash_base and file_name
6083         } elsif ($hash_base && defined $file_name) {
6084                 $file_name =~ s,/+$,,;
6085
6086                 system(git_cmd(), "cat-file", '-e', $hash_base) == 0
6087                         or die_error(404, "Base object does not exist");
6088
6089                 # here errors should not hapen
6090                 open my $fd, "-|", git_cmd(), "ls-tree", $hash_base, "--", $file_name
6091                         or die_error(500, "Open git-ls-tree failed");
6092                 my $line = <$fd>;
6093                 close $fd;
6094
6095                 #'100644 blob 0fa3f3a66fb6a137f6ec2c19351ed4d807070ffa  panic.c'
6096                 unless ($line && $line =~ m/^([0-9]+) (.+) ([0-9a-fA-F]{40})\t/) {
6097                         die_error(404, "File or directory for given base does not exist");
6098                 }
6099                 $type = $2;
6100                 $hash = $3;
6101         } else {
6102                 die_error(400, "Not enough information to find object");
6103         }
6104
6105         print $cgi->redirect(-uri => href(action=>$type, -full=>1,
6106                                           hash=>$hash, hash_base=>$hash_base,
6107                                           file_name=>$file_name),
6108                              -status => '302 Found');
6109 }
6110
6111 sub git_blobdiff {
6112         my $format = shift || 'html';
6113
6114         my $fd;
6115         my @difftree;
6116         my %diffinfo;
6117         my $expires;
6118
6119         # preparing $fd and %diffinfo for git_patchset_body
6120         # new style URI
6121         if (defined $hash_base && defined $hash_parent_base) {
6122                 if (defined $file_name) {
6123                         # read raw output
6124                         open $fd, "-|", git_cmd(), "diff-tree", '-r', @diff_opts,
6125                                 $hash_parent_base, $hash_base,
6126                                 "--", (defined $file_parent ? $file_parent : ()), $file_name
6127                                 or die_error(500, "Open git-diff-tree failed");
6128                         @difftree = map { chomp; $_ } <$fd>;
6129                         close $fd
6130                                 or die_error(404, "Reading git-diff-tree failed");
6131                         @difftree
6132                                 or die_error(404, "Blob diff not found");
6133
6134                 } elsif (defined $hash &&
6135                          $hash =~ /[0-9a-fA-F]{40}/) {
6136                         # try to find filename from $hash
6137
6138                         # read filtered raw output
6139                         open $fd, "-|", git_cmd(), "diff-tree", '-r', @diff_opts,
6140                                 $hash_parent_base, $hash_base, "--"
6141                                 or die_error(500, "Open git-diff-tree failed");
6142                         @difftree =
6143                                 # ':100644 100644 03b21826... 3b93d5e7... M     ls-files.c'
6144                                 # $hash == to_id
6145                                 grep { /^:[0-7]{6} [0-7]{6} [0-9a-fA-F]{40} $hash/ }
6146                                 map { chomp; $_ } <$fd>;
6147                         close $fd
6148                                 or die_error(404, "Reading git-diff-tree failed");
6149                         @difftree
6150                                 or die_error(404, "Blob diff not found");
6151
6152                 } else {
6153                         die_error(400, "Missing one of the blob diff parameters");
6154                 }
6155
6156                 if (@difftree > 1) {
6157                         die_error(400, "Ambiguous blob diff specification");
6158                 }
6159
6160                 %diffinfo = parse_difftree_raw_line($difftree[0]);
6161                 $file_parent ||= $diffinfo{'from_file'} || $file_name;
6162                 $file_name   ||= $diffinfo{'to_file'};
6163
6164                 $hash_parent ||= $diffinfo{'from_id'};
6165                 $hash        ||= $diffinfo{'to_id'};
6166
6167                 # non-textual hash id's can be cached
6168                 if ($hash_base =~ m/^[0-9a-fA-F]{40}$/ &&
6169                     $hash_parent_base =~ m/^[0-9a-fA-F]{40}$/) {
6170                         $expires = '+1d';
6171                 }
6172
6173                 # open patch output
6174                 open $fd, "-|", git_cmd(), "diff-tree", '-r', @diff_opts,
6175                         '-p', ($format eq 'html' ? "--full-index" : ()),
6176                         $hash_parent_base, $hash_base,
6177                         "--", (defined $file_parent ? $file_parent : ()), $file_name
6178                         or die_error(500, "Open git-diff-tree failed");
6179         }
6180
6181         # old/legacy style URI -- not generated anymore since 1.4.3.
6182         if (!%diffinfo) {
6183                 die_error('404 Not Found', "Missing one of the blob diff parameters")
6184         }
6185
6186         # header
6187         if ($format eq 'html') {
6188                 my $formats_nav =
6189                         $cgi->a({-href => href(action=>"blobdiff_plain", -replay=>1)},
6190                                 "raw");
6191                 git_header_html(undef, $expires);
6192                 if (defined $hash_base && (my %co = parse_commit($hash_base))) {
6193                         git_print_page_nav('','', $hash_base,$co{'tree'},$hash_base, $formats_nav);
6194                         git_print_header_div('commit', esc_html($co{'title'}), $hash_base);
6195                 } else {
6196                         print "<div class=\"page_nav\"><br/>$formats_nav<br/></div>\n";
6197                         print "<div class=\"title\">$hash vs $hash_parent</div>\n";
6198                 }
6199                 if (defined $file_name) {
6200                         git_print_page_path($file_name, "blob", $hash_base);
6201                 } else {
6202                         print "<div class=\"page_path\"></div>\n";
6203                 }
6204
6205         } elsif ($format eq 'plain') {
6206                 print $cgi->header(
6207                         -type => 'text/plain',
6208                         -charset => 'utf-8',
6209                         -expires => $expires,
6210                         -content_disposition => 'inline; filename="' . "$file_name" . '.patch"');
6211
6212                 print "X-Git-Url: " . $cgi->self_url() . "\n\n";
6213
6214         } else {
6215                 die_error(400, "Unknown blobdiff format");
6216         }
6217
6218         # patch
6219         if ($format eq 'html') {
6220                 print "<div class=\"page_body\">\n";
6221
6222                 git_patchset_body($fd, [ \%diffinfo ], $hash_base, $hash_parent_base);
6223                 close $fd;
6224
6225                 print "</div>\n"; # class="page_body"
6226                 git_footer_html();
6227
6228         } else {
6229                 while (my $line = <$fd>) {
6230                         $line =~ s!a/($hash|$hash_parent)!'a/'.esc_path($diffinfo{'from_file'})!eg;
6231                         $line =~ s!b/($hash|$hash_parent)!'b/'.esc_path($diffinfo{'to_file'})!eg;
6232
6233                         print $line;
6234
6235                         last if $line =~ m!^\+\+\+!;
6236                 }
6237                 local $/ = undef;
6238                 print <$fd>;
6239                 close $fd;
6240         }
6241 }
6242
6243 sub git_blobdiff_plain {
6244         git_blobdiff('plain');
6245 }
6246
6247 sub git_commitdiff {
6248         my %params = @_;
6249         my $format = $params{-format} || 'html';
6250
6251         my ($patch_max) = gitweb_get_feature('patches');
6252         if ($format eq 'patch') {
6253                 die_error(403, "Patch view not allowed") unless $patch_max;
6254         }
6255
6256         $hash ||= $hash_base || "HEAD";
6257         my %co = parse_commit($hash)
6258             or die_error(404, "Unknown commit object");
6259
6260         # choose format for commitdiff for merge
6261         if (! defined $hash_parent && @{$co{'parents'}} > 1) {
6262                 $hash_parent = '--cc';
6263         }
6264         # we need to prepare $formats_nav before almost any parameter munging
6265         my $formats_nav;
6266         if ($format eq 'html') {
6267                 $formats_nav =
6268                         $cgi->a({-href => href(action=>"commitdiff_plain", -replay=>1)},
6269                                 "raw");
6270                 if ($patch_max && @{$co{'parents'}} <= 1) {
6271                         $formats_nav .= " | " .
6272                                 $cgi->a({-href => href(action=>"patch", -replay=>1)},
6273                                         "patch");
6274                 }
6275
6276                 if (defined $hash_parent &&
6277                     $hash_parent ne '-c' && $hash_parent ne '--cc') {
6278                         # commitdiff with two commits given
6279                         my $hash_parent_short = $hash_parent;
6280                         if ($hash_parent =~ m/^[0-9a-fA-F]{40}$/) {
6281                                 $hash_parent_short = substr($hash_parent, 0, 7);
6282                         }
6283                         $formats_nav .=
6284                                 ' (from';
6285                         for (my $i = 0; $i < @{$co{'parents'}}; $i++) {
6286                                 if ($co{'parents'}[$i] eq $hash_parent) {
6287                                         $formats_nav .= ' parent ' . ($i+1);
6288                                         last;
6289                                 }
6290                         }
6291                         $formats_nav .= ': ' .
6292                                 $cgi->a({-href => href(action=>"commitdiff",
6293                                                        hash=>$hash_parent)},
6294                                         esc_html($hash_parent_short)) .
6295                                 ')';
6296                 } elsif (!$co{'parent'}) {
6297                         # --root commitdiff
6298                         $formats_nav .= ' (initial)';
6299                 } elsif (scalar @{$co{'parents'}} == 1) {
6300                         # single parent commit
6301                         $formats_nav .=
6302                                 ' (parent: ' .
6303                                 $cgi->a({-href => href(action=>"commitdiff",
6304                                                        hash=>$co{'parent'})},
6305                                         esc_html(substr($co{'parent'}, 0, 7))) .
6306                                 ')';
6307                 } else {
6308                         # merge commit
6309                         if ($hash_parent eq '--cc') {
6310                                 $formats_nav .= ' | ' .
6311                                         $cgi->a({-href => href(action=>"commitdiff",
6312                                                                hash=>$hash, hash_parent=>'-c')},
6313                                                 'combined');
6314                         } else { # $hash_parent eq '-c'
6315                                 $formats_nav .= ' | ' .
6316                                         $cgi->a({-href => href(action=>"commitdiff",
6317                                                                hash=>$hash, hash_parent=>'--cc')},
6318                                                 'compact');
6319                         }
6320                         $formats_nav .=
6321                                 ' (merge: ' .
6322                                 join(' ', map {
6323                                         $cgi->a({-href => href(action=>"commitdiff",
6324                                                                hash=>$_)},
6325                                                 esc_html(substr($_, 0, 7)));
6326                                 } @{$co{'parents'}} ) .
6327                                 ')';
6328                 }
6329         }
6330
6331         my $hash_parent_param = $hash_parent;
6332         if (!defined $hash_parent_param) {
6333                 # --cc for multiple parents, --root for parentless
6334                 $hash_parent_param =
6335                         @{$co{'parents'}} > 1 ? '--cc' : $co{'parent'} || '--root';
6336         }
6337
6338         # read commitdiff
6339         my $fd;
6340         my @difftree;
6341         if ($format eq 'html') {
6342                 open $fd, "-|", git_cmd(), "diff-tree", '-r', @diff_opts,
6343                         "--no-commit-id", "--patch-with-raw", "--full-index",
6344                         $hash_parent_param, $hash, "--"
6345                         or die_error(500, "Open git-diff-tree failed");
6346
6347                 while (my $line = <$fd>) {
6348                         chomp $line;
6349                         # empty line ends raw part of diff-tree output
6350                         last unless $line;
6351                         push @difftree, scalar parse_difftree_raw_line($line);
6352                 }
6353
6354         } elsif ($format eq 'plain') {
6355                 open $fd, "-|", git_cmd(), "diff-tree", '-r', @diff_opts,
6356                         '-p', $hash_parent_param, $hash, "--"
6357                         or die_error(500, "Open git-diff-tree failed");
6358         } elsif ($format eq 'patch') {
6359                 # For commit ranges, we limit the output to the number of
6360                 # patches specified in the 'patches' feature.
6361                 # For single commits, we limit the output to a single patch,
6362                 # diverging from the git-format-patch default.
6363                 my @commit_spec = ();
6364                 if ($hash_parent) {
6365                         if ($patch_max > 0) {
6366                                 push @commit_spec, "-$patch_max";
6367                         }
6368                         push @commit_spec, '-n', "$hash_parent..$hash";
6369                 } else {
6370                         if ($params{-single}) {
6371                                 push @commit_spec, '-1';
6372                         } else {
6373                                 if ($patch_max > 0) {
6374                                         push @commit_spec, "-$patch_max";
6375                                 }
6376                                 push @commit_spec, "-n";
6377                         }
6378                         push @commit_spec, '--root', $hash;
6379                 }
6380                 open $fd, "-|", git_cmd(), "format-patch", @diff_opts,
6381                         '--encoding=utf8', '--stdout', @commit_spec
6382                         or die_error(500, "Open git-format-patch failed");
6383         } else {
6384                 die_error(400, "Unknown commitdiff format");
6385         }
6386
6387         # non-textual hash id's can be cached
6388         my $expires;
6389         if ($hash =~ m/^[0-9a-fA-F]{40}$/) {
6390                 $expires = "+1d";
6391         }
6392
6393         # write commit message
6394         if ($format eq 'html') {
6395                 my $refs = git_get_references();
6396                 my $ref = format_ref_marker($refs, $co{'id'});
6397
6398                 git_header_html(undef, $expires);
6399                 git_print_page_nav('commitdiff','', $hash,$co{'tree'},$hash, $formats_nav);
6400                 git_print_header_div('commit', esc_html($co{'title'}) . $ref, $hash);
6401                 print "<div class=\"title_text\">\n" .
6402                       "<table class=\"object_header\">\n";
6403                 git_print_authorship_rows(\%co);
6404                 print "</table>".
6405                       "</div>\n";
6406                 print "<div class=\"page_body\">\n";
6407                 if (@{$co{'comment'}} > 1) {
6408                         print "<div class=\"log\">\n";
6409                         git_print_log($co{'comment'}, -final_empty_line=> 1, -remove_title => 1);
6410                         print "</div>\n"; # class="log"
6411                 }
6412
6413         } elsif ($format eq 'plain') {
6414                 my $refs = git_get_references("tags");
6415                 my $tagname = git_get_rev_name_tags($hash);
6416                 my $filename = basename($project) . "-$hash.patch";
6417
6418                 print $cgi->header(
6419                         -type => 'text/plain',
6420                         -charset => 'utf-8',
6421                         -expires => $expires,
6422                         -content_disposition => 'inline; filename="' . "$filename" . '"');
6423                 my %ad = parse_date($co{'author_epoch'}, $co{'author_tz'});
6424                 print "From: " . to_utf8($co{'author'}) . "\n";
6425                 print "Date: $ad{'rfc2822'} ($ad{'tz_local'})\n";
6426                 print "Subject: " . to_utf8($co{'title'}) . "\n";
6427
6428                 print "X-Git-Tag: $tagname\n" if $tagname;
6429                 print "X-Git-Url: " . $cgi->self_url() . "\n\n";
6430
6431                 foreach my $line (@{$co{'comment'}}) {
6432                         print to_utf8($line) . "\n";
6433                 }
6434                 print "---\n\n";
6435         } elsif ($format eq 'patch') {
6436                 my $filename = basename($project) . "-$hash.patch";
6437
6438                 print $cgi->header(
6439                         -type => 'text/plain',
6440                         -charset => 'utf-8',
6441                         -expires => $expires,
6442                         -content_disposition => 'inline; filename="' . "$filename" . '"');
6443         }
6444
6445         # write patch
6446         if ($format eq 'html') {
6447                 my $use_parents = !defined $hash_parent ||
6448                         $hash_parent eq '-c' || $hash_parent eq '--cc';
6449                 git_difftree_body(\@difftree, $hash,
6450                                   $use_parents ? @{$co{'parents'}} : $hash_parent);
6451                 print "<br/>\n";
6452
6453                 git_patchset_body($fd, \@difftree, $hash,
6454                                   $use_parents ? @{$co{'parents'}} : $hash_parent);
6455                 close $fd;
6456                 print "</div>\n"; # class="page_body"
6457                 git_footer_html();
6458
6459         } elsif ($format eq 'plain') {
6460                 local $/ = undef;
6461                 print <$fd>;
6462                 close $fd
6463                         or print "Reading git-diff-tree failed\n";
6464         } elsif ($format eq 'patch') {
6465                 local $/ = undef;
6466                 print <$fd>;
6467                 close $fd
6468                         or print "Reading git-format-patch failed\n";
6469         }
6470 }
6471
6472 sub git_commitdiff_plain {
6473         git_commitdiff(-format => 'plain');
6474 }
6475
6476 # format-patch-style patches
6477 sub git_patch {
6478         git_commitdiff(-format => 'patch', -single => 1);
6479 }
6480
6481 sub git_patches {
6482         git_commitdiff(-format => 'patch');
6483 }
6484
6485 sub git_history {
6486         git_log_generic('history', \&git_history_body,
6487                         $hash_base, $hash_parent_base,
6488                         $file_name, $hash);
6489 }
6490
6491 sub git_search {
6492         gitweb_check_feature('search') or die_error(403, "Search is disabled");
6493         if (!defined $searchtext) {
6494                 die_error(400, "Text field is empty");
6495         }
6496         if (!defined $hash) {
6497                 $hash = git_get_head_hash($project);
6498         }
6499         my %co = parse_commit($hash);
6500         if (!%co) {
6501                 die_error(404, "Unknown commit object");
6502         }
6503         if (!defined $page) {
6504                 $page = 0;
6505         }
6506
6507         $searchtype ||= 'commit';
6508         if ($searchtype eq 'pickaxe') {
6509                 # pickaxe may take all resources of your box and run for several minutes
6510                 # with every query - so decide by yourself how public you make this feature
6511                 gitweb_check_feature('pickaxe')
6512                     or die_error(403, "Pickaxe is disabled");
6513         }
6514         if ($searchtype eq 'grep') {
6515                 gitweb_check_feature('grep')
6516                     or die_error(403, "Grep is disabled");
6517         }
6518
6519         git_header_html();
6520
6521         if ($searchtype eq 'commit' or $searchtype eq 'author' or $searchtype eq 'committer') {
6522                 my $greptype;
6523                 if ($searchtype eq 'commit') {
6524                         $greptype = "--grep=";
6525                 } elsif ($searchtype eq 'author') {
6526                         $greptype = "--author=";
6527                 } elsif ($searchtype eq 'committer') {
6528                         $greptype = "--committer=";
6529                 }
6530                 $greptype .= $searchtext;
6531                 my @commitlist = parse_commits($hash, 101, (100 * $page), undef,
6532                                                $greptype, '--regexp-ignore-case',
6533                                                $search_use_regexp ? '--extended-regexp' : '--fixed-strings');
6534
6535                 my $paging_nav = '';
6536                 if ($page > 0) {
6537                         $paging_nav .=
6538                                 $cgi->a({-href => href(action=>"search", hash=>$hash,
6539                                                        searchtext=>$searchtext,
6540                                                        searchtype=>$searchtype)},
6541                                         "first");
6542                         $paging_nav .= " &sdot; " .
6543                                 $cgi->a({-href => href(-replay=>1, page=>$page-1),
6544                                          -accesskey => "p", -title => "Alt-p"}, "prev");
6545                 } else {
6546                         $paging_nav .= "first";
6547                         $paging_nav .= " &sdot; prev";
6548                 }
6549                 my $next_link = '';
6550                 if ($#commitlist >= 100) {
6551                         $next_link =
6552                                 $cgi->a({-href => href(-replay=>1, page=>$page+1),
6553                                          -accesskey => "n", -title => "Alt-n"}, "next");
6554                         $paging_nav .= " &sdot; $next_link";
6555                 } else {
6556                         $paging_nav .= " &sdot; next";
6557                 }
6558
6559                 git_print_page_nav('','', $hash,$co{'tree'},$hash, $paging_nav);
6560                 git_print_header_div('commit', esc_html($co{'title'}), $hash);
6561                 if ($page == 0 && !@commitlist) {
6562                         print "<p>No match.</p>\n";
6563                 } else {
6564                         git_search_grep_body(\@commitlist, 0, 99, $next_link);
6565                 }
6566         }
6567
6568         if ($searchtype eq 'pickaxe') {
6569                 git_print_page_nav('','', $hash,$co{'tree'},$hash);
6570                 git_print_header_div('commit', esc_html($co{'title'}), $hash);
6571
6572                 print "<table class=\"pickaxe search\">\n";
6573                 my $alternate = 1;
6574                 local $/ = "\n";
6575                 open my $fd, '-|', git_cmd(), '--no-pager', 'log', @diff_opts,
6576                         '--pretty=format:%H', '--no-abbrev', '--raw', "-S$searchtext",
6577                         ($search_use_regexp ? '--pickaxe-regex' : ());
6578                 undef %co;
6579                 my @files;
6580                 while (my $line = <$fd>) {
6581                         chomp $line;
6582                         next unless $line;
6583
6584                         my %set = parse_difftree_raw_line($line);
6585                         if (defined $set{'commit'}) {
6586                                 # finish previous commit
6587                                 if (%co) {
6588                                         print "</td>\n" .
6589                                               "<td class=\"link\">" .
6590                                               $cgi->a({-href => href(action=>"commit", hash=>$co{'id'})}, "commit") .
6591                                               " | " .
6592                                               $cgi->a({-href => href(action=>"tree", hash=>$co{'tree'}, hash_base=>$co{'id'})}, "tree");
6593                                         print "</td>\n" .
6594                                               "</tr>\n";
6595                                 }
6596
6597                                 if ($alternate) {
6598                                         print "<tr class=\"dark\">\n";
6599                                 } else {
6600                                         print "<tr class=\"light\">\n";
6601                                 }
6602                                 $alternate ^= 1;
6603                                 %co = parse_commit($set{'commit'});
6604                                 my $author = chop_and_escape_str($co{'author_name'}, 15, 5);
6605                                 print "<td title=\"$co{'age_string_age'}\"><i>$co{'age_string_date'}</i></td>\n" .
6606                                       "<td><i>$author</i></td>\n" .
6607                                       "<td>" .
6608                                       $cgi->a({-href => href(action=>"commit", hash=>$co{'id'}),
6609                                               -class => "list subject"},
6610                                               chop_and_escape_str($co{'title'}, 50) . "<br/>");
6611                         } elsif (defined $set{'to_id'}) {
6612                                 next if ($set{'to_id'} =~ m/^0{40}$/);
6613
6614                                 print $cgi->a({-href => href(action=>"blob", hash_base=>$co{'id'},
6615                                                              hash=>$set{'to_id'}, file_name=>$set{'to_file'}),
6616                                               -class => "list"},
6617                                               "<span class=\"match\">" . esc_path($set{'file'}) . "</span>") .
6618                                       "<br/>\n";
6619                         }
6620                 }
6621                 close $fd;
6622
6623                 # finish last commit (warning: repetition!)
6624                 if (%co) {
6625                         print "</td>\n" .
6626                               "<td class=\"link\">" .
6627                               $cgi->a({-href => href(action=>"commit", hash=>$co{'id'})}, "commit") .
6628                               " | " .
6629                               $cgi->a({-href => href(action=>"tree", hash=>$co{'tree'}, hash_base=>$co{'id'})}, "tree");
6630                         print "</td>\n" .
6631                               "</tr>\n";
6632                 }
6633
6634                 print "</table>\n";
6635         }
6636
6637         if ($searchtype eq 'grep') {
6638                 git_print_page_nav('','', $hash,$co{'tree'},$hash);
6639                 git_print_header_div('commit', esc_html($co{'title'}), $hash);
6640
6641                 print "<table class=\"grep_search\">\n";
6642                 my $alternate = 1;
6643                 my $matches = 0;
6644                 local $/ = "\n";
6645                 open my $fd, "-|", git_cmd(), 'grep', '-n',
6646                         $search_use_regexp ? ('-E', '-i') : '-F',
6647                         $searchtext, $co{'tree'};
6648                 my $lastfile = '';
6649                 while (my $line = <$fd>) {
6650                         chomp $line;
6651                         my ($file, $lno, $ltext, $binary);
6652                         last if ($matches++ > 1000);
6653                         if ($line =~ /^Binary file (.+) matches$/) {
6654                                 $file = $1;
6655                                 $binary = 1;
6656                         } else {
6657                                 (undef, $file, $lno, $ltext) = split(/:/, $line, 4);
6658                         }
6659                         if ($file ne $lastfile) {
6660                                 $lastfile and print "</td></tr>\n";
6661                                 if ($alternate++) {
6662                                         print "<tr class=\"dark\">\n";
6663                                 } else {
6664                                         print "<tr class=\"light\">\n";
6665                                 }
6666                                 print "<td class=\"list\">".
6667                                         $cgi->a({-href => href(action=>"blob", hash=>$co{'hash'},
6668                                                                file_name=>"$file"),
6669                                                 -class => "list"}, esc_path($file));
6670                                 print "</td><td>\n";
6671                                 $lastfile = $file;
6672                         }
6673                         if ($binary) {
6674                                 print "<div class=\"binary\">Binary file</div>\n";
6675                         } else {
6676                                 $ltext = untabify($ltext);
6677                                 if ($ltext =~ m/^(.*)($search_regexp)(.*)$/i) {
6678                                         $ltext = esc_html($1, -nbsp=>1);
6679                                         $ltext .= '<span class="match">';
6680                                         $ltext .= esc_html($2, -nbsp=>1);
6681                                         $ltext .= '</span>';
6682                                         $ltext .= esc_html($3, -nbsp=>1);
6683                                 } else {
6684                                         $ltext = esc_html($ltext, -nbsp=>1);
6685                                 }
6686                                 print "<div class=\"pre\">" .
6687                                         $cgi->a({-href => href(action=>"blob", hash=>$co{'hash'},
6688                                                                file_name=>"$file").'#l'.$lno,
6689                                                 -class => "linenr"}, sprintf('%4i', $lno))
6690                                         . ' ' .  $ltext . "</div>\n";
6691                         }
6692                 }
6693                 if ($lastfile) {
6694                         print "</td></tr>\n";
6695                         if ($matches > 1000) {
6696                                 print "<div class=\"diff nodifferences\">Too many matches, listing trimmed</div>\n";
6697                         }
6698                 } else {
6699                         print "<div class=\"diff nodifferences\">No matches found</div>\n";
6700                 }
6701                 close $fd;
6702
6703                 print "</table>\n";
6704         }
6705         git_footer_html();
6706 }
6707
6708 sub git_search_help {
6709         git_header_html();
6710         git_print_page_nav('','', $hash,$hash,$hash);
6711         print <<EOT;
6712 <p><strong>Pattern</strong> is by default a normal string that is matched precisely (but without
6713 regard to case, except in the case of pickaxe). However, when you check the <em>re</em> checkbox,
6714 the pattern entered is recognized as the POSIX extended
6715 <a href="http://en.wikipedia.org/wiki/Regular_expression">regular expression</a> (also case
6716 insensitive).</p>
6717 <dl>
6718 <dt><b>commit</b></dt>
6719 <dd>The commit messages and authorship information will be scanned for the given pattern.</dd>
6720 EOT
6721         my $have_grep = gitweb_check_feature('grep');
6722         if ($have_grep) {
6723                 print <<EOT;
6724 <dt><b>grep</b></dt>
6725 <dd>All files in the currently selected tree (HEAD unless you are explicitly browsing
6726     a different one) are searched for the given pattern. On large trees, this search can take
6727 a while and put some strain on the server, so please use it with some consideration. Note that
6728 due to git-grep peculiarity, currently if regexp mode is turned off, the matches are
6729 case-sensitive.</dd>
6730 EOT
6731         }
6732         print <<EOT;
6733 <dt><b>author</b></dt>
6734 <dd>Name and e-mail of the change author and date of birth of the patch will be scanned for the given pattern.</dd>
6735 <dt><b>committer</b></dt>
6736 <dd>Name and e-mail of the committer and date of commit will be scanned for the given pattern.</dd>
6737 EOT
6738         my $have_pickaxe = gitweb_check_feature('pickaxe');
6739         if ($have_pickaxe) {
6740                 print <<EOT;
6741 <dt><b>pickaxe</b></dt>
6742 <dd>All commits that caused the string to appear or disappear from any file (changes that
6743 added, removed or "modified" the string) will be listed. This search can take a while and
6744 takes a lot of strain on the server, so please use it wisely. Note that since you may be
6745 interested even in changes just changing the case as well, this search is case sensitive.</dd>
6746 EOT
6747         }
6748         print "</dl>\n";
6749         git_footer_html();
6750 }
6751
6752 sub git_shortlog {
6753         git_log_generic('shortlog', \&git_shortlog_body,
6754                         $hash, $hash_parent);
6755 }
6756
6757 ## ......................................................................
6758 ## feeds (RSS, Atom; OPML)
6759
6760 sub git_feed {
6761         my $format = shift || 'atom';
6762         my $have_blame = gitweb_check_feature('blame');
6763
6764         # Atom: http://www.atomenabled.org/developers/syndication/
6765         # RSS:  http://www.notestips.com/80256B3A007F2692/1/NAMO5P9UPQ
6766         if ($format ne 'rss' && $format ne 'atom') {
6767                 die_error(400, "Unknown web feed format");
6768         }
6769
6770         # log/feed of current (HEAD) branch, log of given branch, history of file/directory
6771         my $head = $hash || 'HEAD';
6772         my @commitlist = parse_commits($head, 150, 0, $file_name);
6773
6774         my %latest_commit;
6775         my %latest_date;
6776         my $content_type = "application/$format+xml";
6777         if (defined $cgi->http('HTTP_ACCEPT') &&
6778                  $cgi->Accept('text/xml') > $cgi->Accept($content_type)) {
6779                 # browser (feed reader) prefers text/xml
6780                 $content_type = 'text/xml';
6781         }
6782         if (defined($commitlist[0])) {
6783                 %latest_commit = %{$commitlist[0]};
6784                 my $latest_epoch = $latest_commit{'committer_epoch'};
6785                 %latest_date   = parse_date($latest_epoch);
6786                 my $if_modified = $cgi->http('IF_MODIFIED_SINCE');
6787                 if (defined $if_modified) {
6788                         my $since;
6789                         if (eval { require HTTP::Date; 1; }) {
6790                                 $since = HTTP::Date::str2time($if_modified);
6791                         } elsif (eval { require Time::ParseDate; 1; }) {
6792                                 $since = Time::ParseDate::parsedate($if_modified, GMT => 1);
6793                         }
6794                         if (defined $since && $latest_epoch <= $since) {
6795                                 print $cgi->header(
6796                                         -type => $content_type,
6797                                         -charset => 'utf-8',
6798                                         -last_modified => $latest_date{'rfc2822'},
6799                                         -status => '304 Not Modified');
6800                                 return;
6801                         }
6802                 }
6803                 print $cgi->header(
6804                         -type => $content_type,
6805                         -charset => 'utf-8',
6806                         -last_modified => $latest_date{'rfc2822'});
6807         } else {
6808                 print $cgi->header(
6809                         -type => $content_type,
6810                         -charset => 'utf-8');
6811         }
6812
6813         # Optimization: skip generating the body if client asks only
6814         # for Last-Modified date.
6815         return if ($cgi->request_method() eq 'HEAD');
6816
6817         # header variables
6818         my $title = "$site_name - $project/$action";
6819         my $feed_type = 'log';
6820         if (defined $hash) {
6821                 $title .= " - '$hash'";
6822                 $feed_type = 'branch log';
6823                 if (defined $file_name) {
6824                         $title .= " :: $file_name";
6825                         $feed_type = 'history';
6826                 }
6827         } elsif (defined $file_name) {
6828                 $title .= " - $file_name";
6829                 $feed_type = 'history';
6830         }
6831         $title .= " $feed_type";
6832         my $descr = git_get_project_description($project);
6833         if (defined $descr) {
6834                 $descr = esc_html($descr);
6835         } else {
6836                 $descr = "$project " .
6837                          ($format eq 'rss' ? 'RSS' : 'Atom') .
6838                          " feed";
6839         }
6840         my $owner = git_get_project_owner($project);
6841         $owner = esc_html($owner);
6842
6843         #header
6844         my $alt_url;
6845         if (defined $file_name) {
6846                 $alt_url = href(-full=>1, action=>"history", hash=>$hash, file_name=>$file_name);
6847         } elsif (defined $hash) {
6848                 $alt_url = href(-full=>1, action=>"log", hash=>$hash);
6849         } else {
6850                 $alt_url = href(-full=>1, action=>"summary");
6851         }
6852         print qq!<?xml version="1.0" encoding="utf-8"?>\n!;
6853         if ($format eq 'rss') {
6854                 print <<XML;
6855 <rss version="2.0" xmlns:content="http://purl.org/rss/1.0/modules/content/">
6856 <channel>
6857 XML
6858                 print "<title>$title</title>\n" .
6859                       "<link>$alt_url</link>\n" .
6860                       "<description>$descr</description>\n" .
6861                       "<language>en</language>\n" .
6862                       # project owner is responsible for 'editorial' content
6863                       "<managingEditor>$owner</managingEditor>\n";
6864                 if (defined $logo || defined $favicon) {
6865                         # prefer the logo to the favicon, since RSS
6866                         # doesn't allow both
6867                         my $img = esc_url($logo || $favicon);
6868                         print "<image>\n" .
6869                               "<url>$img</url>\n" .
6870                               "<title>$title</title>\n" .
6871                               "<link>$alt_url</link>\n" .
6872                               "</image>\n";
6873                 }
6874                 if (%latest_date) {
6875                         print "<pubDate>$latest_date{'rfc2822'}</pubDate>\n";
6876                         print "<lastBuildDate>$latest_date{'rfc2822'}</lastBuildDate>\n";
6877                 }
6878                 print "<generator>gitweb v.$version/$git_version</generator>\n";
6879         } elsif ($format eq 'atom') {
6880                 print <<XML;
6881 <feed xmlns="http://www.w3.org/2005/Atom">
6882 XML
6883                 print "<title>$title</title>\n" .
6884                       "<subtitle>$descr</subtitle>\n" .
6885                       '<link rel="alternate" type="text/html" href="' .
6886                       $alt_url . '" />' . "\n" .
6887                       '<link rel="self" type="' . $content_type . '" href="' .
6888                       $cgi->self_url() . '" />' . "\n" .
6889                       "<id>" . href(-full=>1) . "</id>\n" .
6890                       # use project owner for feed author
6891                       "<author><name>$owner</name></author>\n";
6892                 if (defined $favicon) {
6893                         print "<icon>" . esc_url($favicon) . "</icon>\n";
6894                 }
6895                 if (defined $logo_url) {
6896                         # not twice as wide as tall: 72 x 27 pixels
6897                         print "<logo>" . esc_url($logo) . "</logo>\n";
6898                 }
6899                 if (! %latest_date) {
6900                         # dummy date to keep the feed valid until commits trickle in:
6901                         print "<updated>1970-01-01T00:00:00Z</updated>\n";
6902                 } else {
6903                         print "<updated>$latest_date{'iso-8601'}</updated>\n";
6904                 }
6905                 print "<generator version='$version/$git_version'>gitweb</generator>\n";
6906         }
6907
6908         # contents
6909         for (my $i = 0; $i <= $#commitlist; $i++) {
6910                 my %co = %{$commitlist[$i]};
6911                 my $commit = $co{'id'};
6912                 # we read 150, we always show 30 and the ones more recent than 48 hours
6913                 if (($i >= 20) && ((time - $co{'author_epoch'}) > 48*60*60)) {
6914                         last;
6915                 }
6916                 my %cd = parse_date($co{'author_epoch'});
6917
6918                 # get list of changed files
6919                 open my $fd, "-|", git_cmd(), "diff-tree", '-r', @diff_opts,
6920                         $co{'parent'} || "--root",
6921                         $co{'id'}, "--", (defined $file_name ? $file_name : ())
6922                         or next;
6923                 my @difftree = map { chomp; $_ } <$fd>;
6924                 close $fd
6925                         or next;
6926
6927                 # print element (entry, item)
6928                 my $co_url = href(-full=>1, action=>"commitdiff", hash=>$commit);
6929                 if ($format eq 'rss') {
6930                         print "<item>\n" .
6931                               "<title>" . esc_html($co{'title'}) . "</title>\n" .
6932                               "<author>" . esc_html($co{'author'}) . "</author>\n" .
6933                               "<pubDate>$cd{'rfc2822'}</pubDate>\n" .
6934                               "<guid isPermaLink=\"true\">$co_url</guid>\n" .
6935                               "<link>$co_url</link>\n" .
6936                               "<description>" . esc_html($co{'title'}) . "</description>\n" .
6937                               "<content:encoded>" .
6938                               "<![CDATA[\n";
6939                 } elsif ($format eq 'atom') {
6940                         print "<entry>\n" .
6941                               "<title type=\"html\">" . esc_html($co{'title'}) . "</title>\n" .
6942                               "<updated>$cd{'iso-8601'}</updated>\n" .
6943                               "<author>\n" .
6944                               "  <name>" . esc_html($co{'author_name'}) . "</name>\n";
6945                         if ($co{'author_email'}) {
6946                                 print "  <email>" . esc_html($co{'author_email'}) . "</email>\n";
6947                         }
6948                         print "</author>\n" .
6949                               # use committer for contributor
6950                               "<contributor>\n" .
6951                               "  <name>" . esc_html($co{'committer_name'}) . "</name>\n";
6952                         if ($co{'committer_email'}) {
6953                                 print "  <email>" . esc_html($co{'committer_email'}) . "</email>\n";
6954                         }
6955                         print "</contributor>\n" .
6956                               "<published>$cd{'iso-8601'}</published>\n" .
6957                               "<link rel=\"alternate\" type=\"text/html\" href=\"$co_url\" />\n" .
6958                               "<id>$co_url</id>\n" .
6959                               "<content type=\"xhtml\" xml:base=\"" . esc_url($my_url) . "\">\n" .
6960                               "<div xmlns=\"http://www.w3.org/1999/xhtml\">\n";
6961                 }
6962                 my $comment = $co{'comment'};
6963                 print "<pre>\n";
6964                 foreach my $line (@$comment) {
6965                         $line = esc_html($line);
6966                         print "$line\n";
6967                 }
6968                 print "</pre><ul>\n";
6969                 foreach my $difftree_line (@difftree) {
6970                         my %difftree = parse_difftree_raw_line($difftree_line);
6971                         next if !$difftree{'from_id'};
6972
6973                         my $file = $difftree{'file'} || $difftree{'to_file'};
6974
6975                         print "<li>" .
6976                               "[" .
6977                               $cgi->a({-href => href(-full=>1, action=>"blobdiff",
6978                                                      hash=>$difftree{'to_id'}, hash_parent=>$difftree{'from_id'},
6979                                                      hash_base=>$co{'id'}, hash_parent_base=>$co{'parent'},
6980                                                      file_name=>$file, file_parent=>$difftree{'from_file'}),
6981                                       -title => "diff"}, 'D');
6982                         if ($have_blame) {
6983                                 print $cgi->a({-href => href(-full=>1, action=>"blame",
6984                                                              file_name=>$file, hash_base=>$commit),
6985                                               -title => "blame"}, 'B');
6986                         }
6987                         # if this is not a feed of a file history
6988                         if (!defined $file_name || $file_name ne $file) {
6989                                 print $cgi->a({-href => href(-full=>1, action=>"history",
6990                                                              file_name=>$file, hash=>$commit),
6991                                               -title => "history"}, 'H');
6992                         }
6993                         $file = esc_path($file);
6994                         print "] ".
6995                               "$file</li>\n";
6996                 }
6997                 if ($format eq 'rss') {
6998                         print "</ul>]]>\n" .
6999                               "</content:encoded>\n" .
7000                               "</item>\n";
7001                 } elsif ($format eq 'atom') {
7002                         print "</ul>\n</div>\n" .
7003                               "</content>\n" .
7004                               "</entry>\n";
7005                 }
7006         }
7007
7008         # end of feed
7009         if ($format eq 'rss') {
7010                 print "</channel>\n</rss>\n";
7011         } elsif ($format eq 'atom') {
7012                 print "</feed>\n";
7013         }
7014 }
7015
7016 sub git_rss {
7017         git_feed('rss');
7018 }
7019
7020 sub git_atom {
7021         git_feed('atom');
7022 }
7023
7024 sub git_opml {
7025         my @list = git_get_projects_list();
7026
7027         print $cgi->header(
7028                 -type => 'text/xml',
7029                 -charset => 'utf-8',
7030                 -content_disposition => 'inline; filename="opml.xml"');
7031
7032         print <<XML;
7033 <?xml version="1.0" encoding="utf-8"?>
7034 <opml version="1.0">
7035 <head>
7036   <title>$site_name OPML Export</title>
7037 </head>
7038 <body>
7039 <outline text="git RSS feeds">
7040 XML
7041
7042         foreach my $pr (@list) {
7043                 my %proj = %$pr;
7044                 my $head = git_get_head_hash($proj{'path'});
7045                 if (!defined $head) {
7046                         next;
7047                 }
7048                 $git_dir = "$projectroot/$proj{'path'}";
7049                 my %co = parse_commit($head);
7050                 if (!%co) {
7051                         next;
7052                 }
7053
7054                 my $path = esc_html(chop_str($proj{'path'}, 25, 5));
7055                 my $rss  = href('project' => $proj{'path'}, 'action' => 'rss', -full => 1);
7056                 my $html = href('project' => $proj{'path'}, 'action' => 'summary', -full => 1);
7057                 print "<outline type=\"rss\" text=\"$path\" title=\"$path\" xmlUrl=\"$rss\" htmlUrl=\"$html\"/>\n";
7058         }
7059         print <<XML;
7060 </outline>
7061 </body>
7062 </opml>
7063 XML
7064 }