Lady’s Gitweb - Gitweb/blob - gitweb.perl

   1 #!/usr/bin/perl
   2
   3 # gitweb - simple web interface to track changes in git repositories
   4 #
   5 # (C) 2005-2006, Kay Sievers <kay.sievers@vrfy.org>
   6 # (C) 2005, Christian Gierke
   7 #
   8 # This program is licensed under the GPLv2
   9
  10 use 5.008;
  11 use strict;
  12 use warnings;
  13 use CGI qw(:standard :escapeHTML -nosticky);
  14 use CGI::Util qw(unescape);
  15 use CGI::Carp qw(fatalsToBrowser set_message);
  16 use Encode;
  17 use Fcntl ':mode';
  18 use File::Find qw();
  19 use File::Basename qw(basename);
  20 use Time::HiRes qw(gettimeofday tv_interval);
  21 binmode STDOUT, ':utf8';
  22
  23 our $t0 = [ gettimeofday() ];
  24 our $number_of_git_cmds = 0;
  25
  26 BEGIN {
  27         CGI->compile() if $ENV{'MOD_PERL'};
  28 }
  29
  30 our $version = "++GIT_VERSION++";
  31
  32 our ($my_url, $my_uri, $base_url, $path_info, $home_link);
  33 sub evaluate_uri {
  34         our $cgi;
  35
  36         our $my_url = $cgi->url();
  37         our $my_uri = $cgi->url(-absolute => 1);
  38
  39         # Base URL for relative URLs in gitweb ($logo, $favicon, ...),
  40         # needed and used only for URLs with nonempty PATH_INFO
  41         our $base_url = $my_url;
  42
  43         # When the script is used as DirectoryIndex, the URL does not contain the name
  44         # of the script file itself, and $cgi->url() fails to strip PATH_INFO, so we
  45         # have to do it ourselves. We make $path_info global because it's also used
  46         # later on.
  47         #
  48         # Another issue with the script being the DirectoryIndex is that the resulting
  49         # $my_url data is not the full script URL: this is good, because we want
  50         # generated links to keep implying the script name if it wasn't explicitly
  51         # indicated in the URL we're handling, but it means that $my_url cannot be used
  52         # as base URL.
  53         # Therefore, if we needed to strip PATH_INFO, then we know that we have
  54         # to build the base URL ourselves:
  55         our $path_info = $ENV{"PATH_INFO"};
  56         if ($path_info) {
  57                 if ($my_url =~ s,\Q$path_info\E$,, &&
  58                     $my_uri =~ s,\Q$path_info\E$,, &&
  59                     defined $ENV{'SCRIPT_NAME'}) {
  60                         $base_url = $cgi->url(-base => 1) . $ENV{'SCRIPT_NAME'};
  61                 }
  62         }
  63
  64         # target of the home link on top of all pages
  65         our $home_link = $my_uri || "/";
  66 }
  67
  68 # core git executable to use
  69 # this can just be "git" if your webserver has a sensible PATH
  70 our $GIT = "++GIT_BINDIR++/git";
  71
  72 # absolute fs-path which will be prepended to the project path
  73 #our $projectroot = "/pub/scm";
  74 our $projectroot = "++GITWEB_PROJECTROOT++";
  75
  76 # fs traversing limit for getting project list
  77 # the number is relative to the projectroot
  78 our $project_maxdepth = "++GITWEB_PROJECT_MAXDEPTH++";
  79
  80 # string of the home link on top of all pages
  81 our $home_link_str = "++GITWEB_HOME_LINK_STR++";
  82
  83 # name of your site or organization to appear in page titles
  84 # replace this with something more descriptive for clearer bookmarks
  85 our $site_name = "++GITWEB_SITENAME++"
  86                  || ($ENV{'SERVER_NAME'} || "Untitled") . " Git";
  87
  88 # filename of html text to include at top of each page
  89 our $site_header = "++GITWEB_SITE_HEADER++";
  90 # html text to include at home page
  91 our $home_text = "++GITWEB_HOMETEXT++";
  92 # filename of html text to include at bottom of each page
  93 our $site_footer = "++GITWEB_SITE_FOOTER++";
  94
  95 # URI of stylesheets
  96 our @stylesheets = ("++GITWEB_CSS++");
  97 # URI of a single stylesheet, which can be overridden in GITWEB_CONFIG.
  98 our $stylesheet = undef;
  99
 100 # URI of GIT logo (72x27 size)
 101 our $logo = "++GITWEB_LOGO++";
 102 # URI of GIT favicon, assumed to be image/png type
 103 our $favicon = "++GITWEB_FAVICON++";
 104 # URI of gitweb.js (JavaScript code for gitweb)
 105 our $javascript = "++GITWEB_JS++";
 106
 107 # URI and label (title) of GIT logo link
 108 #our $logo_url = "http://www.kernel.org/pub/software/scm/git/docs/";
 109 #our $logo_label = "git documentation";
 110 our $logo_url = "http://git-scm.com/";
 111 our $logo_label = "git homepage";
 112
 113 # source of projects list
 114 our $projects_list = "++GITWEB_LIST++";
 115
 116 # the width (in characters) of the projects list "Description" column
 117 our $projects_list_description_width = 25;
 118
 119 # default order of projects list
 120 # valid values are none, project, descr, owner, and age
 121 our $default_projects_order = "project";
 122
 123 # show repository only if this file exists
 124 # (only effective if this variable evaluates to true)
 125 our $export_ok = "++GITWEB_EXPORT_OK++";
 126
 127 # show repository only if this subroutine returns true
 128 # when given the path to the project, for example:
 129 #    sub { return -e "$_[0]/git-daemon-export-ok"; }
 130 our $export_auth_hook = undef;
 131
 132 # only allow viewing of repositories also shown on the overview page
 133 our $strict_export = "++GITWEB_STRICT_EXPORT++";
 134
 135 # list of git base URLs used for URL to where fetch project from,
 136 # i.e. full URL is "$git_base_url/$project"
 137 our @git_base_url_list = grep { $_ ne '' } ("++GITWEB_BASE_URL++");
 138
 139 # default blob_plain mimetype and default charset for text/plain blob
 140 our $default_blob_plain_mimetype = 'text/plain';
 141 our $default_text_plain_charset  = undef;
 142
 143 # file to use for guessing MIME types before trying /etc/mime.types
 144 # (relative to the current git repository)
 145 our $mimetypes_file = undef;
 146
 147 # assume this charset if line contains non-UTF-8 characters;
 148 # it should be valid encoding (see Encoding::Supported(3pm) for list),
 149 # for which encoding all byte sequences are valid, for example
 150 # 'iso-8859-1' aka 'latin1' (it is decoded without checking, so it
 151 # could be even 'utf-8' for the old behavior)
 152 our $fallback_encoding = 'latin1';
 153
 154 # rename detection options for git-diff and git-diff-tree
 155 # - default is '-M', with the cost proportional to
 156 #   (number of removed files) * (number of new files).
 157 # - more costly is '-C' (which implies '-M'), with the cost proportional to
 158 #   (number of changed files + number of removed files) * (number of new files)
 159 # - even more costly is '-C', '--find-copies-harder' with cost
 160 #   (number of files in the original tree) * (number of new files)
 161 # - one might want to include '-B' option, e.g. '-B', '-M'
 162 our @diff_opts = ('-M'); # taken from git_commit
 163
 164 # Disables features that would allow repository owners to inject script into
 165 # the gitweb domain.
 166 our $prevent_xss = 0;
 167
 168 # Path to the highlight executable to use (must be the one from
 169 # http://www.andre-simon.de due to assumptions about parameters and output).
 170 # Useful if highlight is not installed on your webserver's PATH.
 171 # [Default: highlight]
 172 our $highlight_bin = "++HIGHLIGHT_BIN++";
 173
 174 # information about snapshot formats that gitweb is capable of serving
 175 our %known_snapshot_formats = (
 176         # name => {
 177         #       'display' => display name,
 178         #       'type' => mime type,
 179         #       'suffix' => filename suffix,
 180         #       'format' => --format for git-archive,
 181         #       'compressor' => [compressor command and arguments]
 182         #                       (array reference, optional)
 183         #       'disabled' => boolean (optional)}
 184         #
 185         'tgz' => {
 186                 'display' => 'tar.gz',
 187                 'type' => 'application/x-gzip',
 188                 'suffix' => '.tar.gz',
 189                 'format' => 'tar',
 190                 'compressor' => ['gzip']},
 191
 192         'tbz2' => {
 193                 'display' => 'tar.bz2',
 194                 'type' => 'application/x-bzip2',
 195                 'suffix' => '.tar.bz2',
 196                 'format' => 'tar',
 197                 'compressor' => ['bzip2']},
 198
 199         'txz' => {
 200                 'display' => 'tar.xz',
 201                 'type' => 'application/x-xz',
 202                 'suffix' => '.tar.xz',
 203                 'format' => 'tar',
 204                 'compressor' => ['xz'],
 205                 'disabled' => 1},
 206
 207         'zip' => {
 208                 'display' => 'zip',
 209                 'type' => 'application/x-zip',
 210                 'suffix' => '.zip',
 211                 'format' => 'zip'},
 212 );
 213
 214 # Aliases so we understand old gitweb.snapshot values in repository
 215 # configuration.
 216 our %known_snapshot_format_aliases = (
 217         'gzip'  => 'tgz',
 218         'bzip2' => 'tbz2',
 219         'xz'    => 'txz',
 220
 221         # backward compatibility: legacy gitweb config support
 222         'x-gzip' => undef, 'gz' => undef,
 223         'x-bzip2' => undef, 'bz2' => undef,
 224         'x-zip' => undef, '' => undef,
 225 );
 226
 227 # Pixel sizes for icons and avatars. If the default font sizes or lineheights
 228 # are changed, it may be appropriate to change these values too via
 229 # $GITWEB_CONFIG.
 230 our %avatar_size = (
 231         'default' => 16,
 232         'double'  => 32
 233 );
 234
 235 # Used to set the maximum load that we will still respond to gitweb queries.
 236 # If server load exceed this value then return "503 server busy" error.
 237 # If gitweb cannot determined server load, it is taken to be 0.
 238 # Leave it undefined (or set to 'undef') to turn off load checking.
 239 our $maxload = 300;
 240
 241 # configuration for 'highlight' (http://www.andre-simon.de/)
 242 # match by basename
 243 our %highlight_basename = (
 244         #'Program' => 'py',
 245         #'Library' => 'py',
 246         'SConstruct' => 'py', # SCons equivalent of Makefile
 247         'Makefile' => 'make',
 248 );
 249 # match by extension
 250 our %highlight_ext = (
 251         # main extensions, defining name of syntax;
 252         # see files in /usr/share/highlight/langDefs/ directory
 253         map { $_ => $_ }
 254                 qw(py c cpp rb java css php sh pl js tex bib xml awk bat ini spec tcl),
 255         # alternate extensions, see /etc/highlight/filetypes.conf
 256         'h' => 'c',
 257         map { $_ => 'cpp' } qw(cxx c++ cc),
 258         map { $_ => 'php' } qw(php3 php4),
 259         map { $_ => 'pl'  } qw(perl pm), # perhaps also 'cgi'
 260         'mak' => 'make',
 261         map { $_ => 'xml' } qw(xhtml html htm),
 262 );
 263
 264 # You define site-wide feature defaults here; override them with
 265 # $GITWEB_CONFIG as necessary.
 266 our %feature = (
 267         # feature => {
 268         #       'sub' => feature-sub (subroutine),
 269         #       'override' => allow-override (boolean),
 270         #       'default' => [ default options...] (array reference)}
 271         #
 272         # if feature is overridable (it means that allow-override has true value),
 273         # then feature-sub will be called with default options as parameters;
 274         # return value of feature-sub indicates if to enable specified feature
 275         #
 276         # if there is no 'sub' key (no feature-sub), then feature cannot be
 277         # overridden
 278         #
 279         # use gitweb_get_feature(<feature>) to retrieve the <feature> value
 280         # (an array) or gitweb_check_feature(<feature>) to check if <feature>
 281         # is enabled
 282
 283         # Enable the 'blame' blob view, showing the last commit that modified
 284         # each line in the file. This can be very CPU-intensive.
 285
 286         # To enable system wide have in $GITWEB_CONFIG
 287         # $feature{'blame'}{'default'} = [1];
 288         # To have project specific config enable override in $GITWEB_CONFIG
 289         # $feature{'blame'}{'override'} = 1;
 290         # and in project config gitweb.blame = 0|1;
 291         'blame' => {
 292                 'sub' => sub { feature_bool('blame', @_) },
 293                 'override' => 0,
 294                 'default' => [0]},
 295
 296         # Enable the 'snapshot' link, providing a compressed archive of any
 297         # tree. This can potentially generate high traffic if you have large
 298         # project.
 299
 300         # Value is a list of formats defined in %known_snapshot_formats that
 301         # you wish to offer.
 302         # To disable system wide have in $GITWEB_CONFIG
 303         # $feature{'snapshot'}{'default'} = [];
 304         # To have project specific config enable override in $GITWEB_CONFIG
 305         # $feature{'snapshot'}{'override'} = 1;
 306         # and in project config, a comma-separated list of formats or "none"
 307         # to disable.  Example: gitweb.snapshot = tbz2,zip;
 308         'snapshot' => {
 309                 'sub' => \&feature_snapshot,
 310                 'override' => 0,
 311                 'default' => ['tgz']},
 312
 313         # Enable text search, which will list the commits which match author,
 314         # committer or commit text to a given string.  Enabled by default.
 315         # Project specific override is not supported.
 316         'search' => {
 317                 'override' => 0,
 318                 'default' => [1]},
 319
 320         # Enable grep search, which will list the files in currently selected
 321         # tree containing the given string. Enabled by default. This can be
 322         # potentially CPU-intensive, of course.
 323
 324         # To enable system wide have in $GITWEB_CONFIG
 325         # $feature{'grep'}{'default'} = [1];
 326         # To have project specific config enable override in $GITWEB_CONFIG
 327         # $feature{'grep'}{'override'} = 1;
 328         # and in project config gitweb.grep = 0|1;
 329         'grep' => {
 330                 'sub' => sub { feature_bool('grep', @_) },
 331                 'override' => 0,
 332                 'default' => [1]},
 333
 334         # Enable the pickaxe search, which will list the commits that modified
 335         # a given string in a file. This can be practical and quite faster
 336         # alternative to 'blame', but still potentially CPU-intensive.
 337
 338         # To enable system wide have in $GITWEB_CONFIG
 339         # $feature{'pickaxe'}{'default'} = [1];
 340         # To have project specific config enable override in $GITWEB_CONFIG
 341         # $feature{'pickaxe'}{'override'} = 1;
 342         # and in project config gitweb.pickaxe = 0|1;
 343         'pickaxe' => {
 344                 'sub' => sub { feature_bool('pickaxe', @_) },
 345                 'override' => 0,
 346                 'default' => [1]},
 347
 348         # Enable showing size of blobs in a 'tree' view, in a separate
 349         # column, similar to what 'ls -l' does.  This cost a bit of IO.
 350
 351         # To disable system wide have in $GITWEB_CONFIG
 352         # $feature{'show-sizes'}{'default'} = [0];
 353         # To have project specific config enable override in $GITWEB_CONFIG
 354         # $feature{'show-sizes'}{'override'} = 1;
 355         # and in project config gitweb.showsizes = 0|1;
 356         'show-sizes' => {
 357                 'sub' => sub { feature_bool('showsizes', @_) },
 358                 'override' => 0,
 359                 'default' => [1]},
 360
 361         # Make gitweb use an alternative format of the URLs which can be
 362         # more readable and natural-looking: project name is embedded
 363         # directly in the path and the query string contains other
 364         # auxiliary information. All gitweb installations recognize
 365         # URL in either format; this configures in which formats gitweb
 366         # generates links.
 367
 368         # To enable system wide have in $GITWEB_CONFIG
 369         # $feature{'pathinfo'}{'default'} = [1];
 370         # Project specific override is not supported.
 371
 372         # Note that you will need to change the default location of CSS,
 373         # favicon, logo and possibly other files to an absolute URL. Also,
 374         # if gitweb.cgi serves as your indexfile, you will need to force
 375         # $my_uri to contain the script name in your $GITWEB_CONFIG.
 376         'pathinfo' => {
 377                 'override' => 0,
 378                 'default' => [0]},
 379
 380         # Make gitweb consider projects in project root subdirectories
 381         # to be forks of existing projects. Given project $projname.git,
 382         # projects matching $projname/*.git will not be shown in the main
 383         # projects list, instead a '+' mark will be added to $projname
 384         # there and a 'forks' view will be enabled for the project, listing
 385         # all the forks. If project list is taken from a file, forks have
 386         # to be listed after the main project.
 387
 388         # To enable system wide have in $GITWEB_CONFIG
 389         # $feature{'forks'}{'default'} = [1];
 390         # Project specific override is not supported.
 391         'forks' => {
 392                 'override' => 0,
 393                 'default' => [0]},
 394
 395         # Insert custom links to the action bar of all project pages.
 396         # This enables you mainly to link to third-party scripts integrating
 397         # into gitweb; e.g. git-browser for graphical history representation
 398         # or custom web-based repository administration interface.
 399
 400         # The 'default' value consists of a list of triplets in the form
 401         # (label, link, position) where position is the label after which
 402         # to insert the link and link is a format string where %n expands
 403         # to the project name, %f to the project path within the filesystem,
 404         # %h to the current hash (h gitweb parameter) and %b to the current
 405         # hash base (hb gitweb parameter); %% expands to %.
 406
 407         # To enable system wide have in $GITWEB_CONFIG e.g.
 408         # $feature{'actions'}{'default'} = [('graphiclog',
 409         #       '/git-browser/by-commit.html?r=%n', 'summary')];
 410         # Project specific override is not supported.
 411         'actions' => {
 412                 'override' => 0,
 413                 'default' => []},
 414
 415         # Allow gitweb scan project content tags described in ctags/
 416         # of project repository, and display the popular Web 2.0-ish
 417         # "tag cloud" near the project list. Note that this is something
 418         # COMPLETELY different from the normal Git tags.
 419
 420         # gitweb by itself can show existing tags, but it does not handle
 421         # tagging itself; you need an external application for that.
 422         # For an example script, check Girocco's cgi/tagproj.cgi.
 423         # You may want to install the HTML::TagCloud Perl module to get
 424         # a pretty tag cloud instead of just a list of tags.
 425
 426         # To enable system wide have in $GITWEB_CONFIG
 427         # $feature{'ctags'}{'default'} = ['path_to_tag_script'];
 428         # Project specific override is not supported.
 429         'ctags' => {
 430                 'override' => 0,
 431                 'default' => [0]},
 432
 433         # The maximum number of patches in a patchset generated in patch
 434         # view. Set this to 0 or undef to disable patch view, or to a
 435         # negative number to remove any limit.
 436
 437         # To disable system wide have in $GITWEB_CONFIG
 438         # $feature{'patches'}{'default'} = [0];
 439         # To have project specific config enable override in $GITWEB_CONFIG
 440         # $feature{'patches'}{'override'} = 1;
 441         # and in project config gitweb.patches = 0|n;
 442         # where n is the maximum number of patches allowed in a patchset.
 443         'patches' => {
 444                 'sub' => \&feature_patches,
 445                 'override' => 0,
 446                 'default' => [16]},
 447
 448         # Avatar support. When this feature is enabled, views such as
 449         # shortlog or commit will display an avatar associated with
 450         # the email of the committer(s) and/or author(s).
 451
 452         # Currently available providers are gravatar and picon.
 453         # If an unknown provider is specified, the feature is disabled.
 454
 455         # Gravatar depends on Digest::MD5.
 456         # Picon currently relies on the indiana.edu database.
 457
 458         # To enable system wide have in $GITWEB_CONFIG
 459         # $feature{'avatar'}{'default'} = ['<provider>'];
 460         # where <provider> is either gravatar or picon.
 461         # To have project specific config enable override in $GITWEB_CONFIG
 462         # $feature{'avatar'}{'override'} = 1;
 463         # and in project config gitweb.avatar = <provider>;
 464         'avatar' => {
 465                 'sub' => \&feature_avatar,
 466                 'override' => 0,
 467                 'default' => ['']},
 468
 469         # Enable displaying how much time and how many git commands
 470         # it took to generate and display page.  Disabled by default.
 471         # Project specific override is not supported.
 472         'timed' => {
 473                 'override' => 0,
 474                 'default' => [0]},
 475
 476         # Enable turning some links into links to actions which require
 477         # JavaScript to run (like 'blame_incremental').  Not enabled by
 478         # default.  Project specific override is currently not supported.
 479         'javascript-actions' => {
 480                 'override' => 0,
 481                 'default' => [0]},
 482
 483         # Syntax highlighting support. This is based on Daniel Svensson's
 484         # and Sham Chukoury's work in gitweb-xmms2.git.
 485         # It requires the 'highlight' program present in $PATH,
 486         # and therefore is disabled by default.
 487
 488         # To enable system wide have in $GITWEB_CONFIG
 489         # $feature{'highlight'}{'default'} = [1];
 490
 491         'highlight' => {
 492                 'sub' => sub { feature_bool('highlight', @_) },
 493                 'override' => 0,
 494                 'default' => [0]},
 495
 496         # Enable displaying of remote heads in the heads list
 497
 498         # To enable system wide have in $GITWEB_CONFIG
 499         # $feature{'remote_heads'}{'default'} = [1];
 500         # To have project specific config enable override in $GITWEB_CONFIG
 501         # $feature{'remote_heads'}{'override'} = 1;
 502         # and in project config gitweb.remote_heads = 0|1;
 503         'remote_heads' => {
 504                 'sub' => sub { feature_bool('remote_heads', @_) },
 505                 'override' => 0,
 506                 'default' => [0]},
 507 );
 508
 509 sub gitweb_get_feature {
 510         my ($name) = @_;
 511         return unless exists $feature{$name};
 512         my ($sub, $override, @defaults) = (
 513                 $feature{$name}{'sub'},
 514                 $feature{$name}{'override'},
 515                 @{$feature{$name}{'default'}});
 516         # project specific override is possible only if we have project
 517         our $git_dir; # global variable, declared later
 518         if (!$override || !defined $git_dir) {
 519                 return @defaults;
 520         }
 521         if (!defined $sub) {
 522                 warn "feature $name is not overridable";
 523                 return @defaults;
 524         }
 525         return $sub->(@defaults);
 526 }
 527
 528 # A wrapper to check if a given feature is enabled.
 529 # With this, you can say
 530 #
 531 #   my $bool_feat = gitweb_check_feature('bool_feat');
 532 #   gitweb_check_feature('bool_feat') or somecode;
 533 #
 534 # instead of
 535 #
 536 #   my ($bool_feat) = gitweb_get_feature('bool_feat');
 537 #   (gitweb_get_feature('bool_feat'))[0] or somecode;
 538 #
 539 sub gitweb_check_feature {
 540         return (gitweb_get_feature(@_))[0];
 541 }
 542
 543
 544 sub feature_bool {
 545         my $key = shift;
 546         my ($val) = git_get_project_config($key, '--bool');
 547
 548         if (!defined $val) {
 549                 return ($_[0]);
 550         } elsif ($val eq 'true') {
 551                 return (1);
 552         } elsif ($val eq 'false') {
 553                 return (0);
 554         }
 555 }
 556
 557 sub feature_snapshot {
 558         my (@fmts) = @_;
 559
 560         my ($val) = git_get_project_config('snapshot');
 561
 562         if ($val) {
 563                 @fmts = ($val eq 'none' ? () : split /\s*[,\s]\s*/, $val);
 564         }
 565
 566         return @fmts;
 567 }
 568
 569 sub feature_patches {
 570         my @val = (git_get_project_config('patches', '--int'));
 571
 572         if (@val) {
 573                 return @val;
 574         }
 575
 576         return ($_[0]);
 577 }
 578
 579 sub feature_avatar {
 580         my @val = (git_get_project_config('avatar'));
 581
 582         return @val ? @val : @_;
 583 }
 584
 585 # checking HEAD file with -e is fragile if the repository was
 586 # initialized long time ago (i.e. symlink HEAD) and was pack-ref'ed
 587 # and then pruned.
 588 sub check_head_link {
 589         my ($dir) = @_;
 590         my $headfile = "$dir/HEAD";
 591         return ((-e $headfile) ||
 592                 (-l $headfile && readlink($headfile) =~ /^refs\/heads\//));
 593 }
 594
 595 sub check_export_ok {
 596         my ($dir) = @_;
 597         return (check_head_link($dir) &&
 598                 (!$export_ok || -e "$dir/$export_ok") &&
 599                 (!$export_auth_hook || $export_auth_hook->($dir)));
 600 }
 601
 602 # process alternate names for backward compatibility
 603 # filter out unsupported (unknown) snapshot formats
 604 sub filter_snapshot_fmts {
 605         my @fmts = @_;
 606
 607         @fmts = map {
 608                 exists $known_snapshot_format_aliases{$_} ?
 609                        $known_snapshot_format_aliases{$_} : $_} @fmts;
 610         @fmts = grep {
 611                 exists $known_snapshot_formats{$_} &&
 612                 !$known_snapshot_formats{$_}{'disabled'}} @fmts;
 613 }
 614
 615 # If it is set to code reference, it is code that it is to be run once per
 616 # request, allowing updating configurations that change with each request,
 617 # while running other code in config file only once.
 618 #
 619 # Otherwise, if it is false then gitweb would process config file only once;
 620 # if it is true then gitweb config would be run for each request.
 621 our $per_request_config = 1;
 622
 623 our ($GITWEB_CONFIG, $GITWEB_CONFIG_SYSTEM);
 624 sub evaluate_gitweb_config {
 625         our $GITWEB_CONFIG = $ENV{'GITWEB_CONFIG'} || "++GITWEB_CONFIG++";
 626         our $GITWEB_CONFIG_SYSTEM = $ENV{'GITWEB_CONFIG_SYSTEM'} || "++GITWEB_CONFIG_SYSTEM++";
 627         # die if there are errors parsing config file
 628         if (-e $GITWEB_CONFIG) {
 629                 do $GITWEB_CONFIG;
 630                 die $@ if $@;
 631         } elsif (-e $GITWEB_CONFIG_SYSTEM) {
 632                 do $GITWEB_CONFIG_SYSTEM;
 633                 die $@ if $@;
 634         }
 635 }
 636
 637 # Get loadavg of system, to compare against $maxload.
 638 # Currently it requires '/proc/loadavg' present to get loadavg;
 639 # if it is not present it returns 0, which means no load checking.
 640 sub get_loadavg {
 641         if( -e '/proc/loadavg' ){
 642                 open my $fd, '<', '/proc/loadavg'
 643                         or return 0;
 644                 my @load = split(/\s+/, scalar <$fd>);
 645                 close $fd;
 646
 647                 # The first three columns measure CPU and IO utilization of the last one,
 648                 # five, and 10 minute periods.  The fourth column shows the number of
 649                 # currently running processes and the total number of processes in the m/n
 650                 # format.  The last column displays the last process ID used.
 651                 return $load[0] || 0;
 652         }
 653         # additional checks for load average should go here for things that don't export
 654         # /proc/loadavg
 655
 656         return 0;
 657 }
 658
 659 # version of the core git binary
 660 our $git_version;
 661 sub evaluate_git_version {
 662         our $git_version = qx("$GIT" --version) =~ m/git version (.*)$/ ? $1 : "unknown";
 663         $number_of_git_cmds++;
 664 }
 665
 666 sub check_loadavg {
 667         if (defined $maxload && get_loadavg() > $maxload) {
 668                 die_error(503, "The load average on the server is too high");
 669         }
 670 }
 671
 672 # ======================================================================
 673 # input validation and dispatch
 674
 675 # input parameters can be collected from a variety of sources (presently, CGI
 676 # and PATH_INFO), so we define an %input_params hash that collects them all
 677 # together during validation: this allows subsequent uses (e.g. href()) to be
 678 # agnostic of the parameter origin
 679
 680 our %input_params = ();
 681
 682 # input parameters are stored with the long parameter name as key. This will
 683 # also be used in the href subroutine to convert parameters to their CGI
 684 # equivalent, and since the href() usage is the most frequent one, we store
 685 # the name -> CGI key mapping here, instead of the reverse.
 686 #
 687 # XXX: Warning: If you touch this, check the search form for updating,
 688 # too.
 689
 690 our @cgi_param_mapping = (
 691         project => "p",
 692         action => "a",
 693         file_name => "f",
 694         file_parent => "fp",
 695         hash => "h",
 696         hash_parent => "hp",
 697         hash_base => "hb",
 698         hash_parent_base => "hpb",
 699         page => "pg",
 700         order => "o",
 701         searchtext => "s",
 702         searchtype => "st",
 703         snapshot_format => "sf",
 704         extra_options => "opt",
 705         search_use_regexp => "sr",
 706         # this must be last entry (for manipulation from JavaScript)
 707         javascript => "js"
 708 );
 709 our %cgi_param_mapping = @cgi_param_mapping;
 710
 711 # we will also need to know the possible actions, for validation
 712 our %actions = (
 713         "blame" => \&git_blame,
 714         "blame_incremental" => \&git_blame_incremental,
 715         "blame_data" => \&git_blame_data,
 716         "blobdiff" => \&git_blobdiff,
 717         "blobdiff_plain" => \&git_blobdiff_plain,
 718         "blob" => \&git_blob,
 719         "blob_plain" => \&git_blob_plain,
 720         "commitdiff" => \&git_commitdiff,
 721         "commitdiff_plain" => \&git_commitdiff_plain,
 722         "commit" => \&git_commit,
 723         "forks" => \&git_forks,
 724         "heads" => \&git_heads,
 725         "history" => \&git_history,
 726         "log" => \&git_log,
 727         "patch" => \&git_patch,
 728         "patches" => \&git_patches,
 729         "remotes" => \&git_remotes,
 730         "rss" => \&git_rss,
 731         "atom" => \&git_atom,
 732         "search" => \&git_search,
 733         "search_help" => \&git_search_help,
 734         "shortlog" => \&git_shortlog,
 735         "summary" => \&git_summary,
 736         "tag" => \&git_tag,
 737         "tags" => \&git_tags,
 738         "tree" => \&git_tree,
 739         "snapshot" => \&git_snapshot,
 740         "object" => \&git_object,
 741         # those below don't need $project
 742         "opml" => \&git_opml,
 743         "project_list" => \&git_project_list,
 744         "project_index" => \&git_project_index,
 745 );
 746
 747 # finally, we have the hash of allowed extra_options for the commands that
 748 # allow them
 749 our %allowed_options = (
 750         "--no-merges" => [ qw(rss atom log shortlog history) ],
 751 );
 752
 753 # fill %input_params with the CGI parameters. All values except for 'opt'
 754 # should be single values, but opt can be an array. We should probably
 755 # build an array of parameters that can be multi-valued, but since for the time
 756 # being it's only this one, we just single it out
 757 sub evaluate_query_params {
 758         our $cgi;
 759
 760         while (my ($name, $symbol) = each %cgi_param_mapping) {
 761                 if ($symbol eq 'opt') {
 762                         $input_params{$name} = [ $cgi->param($symbol) ];
 763                 } else {
 764                         $input_params{$name} = $cgi->param($symbol);
 765                 }
 766         }
 767 }
 768
 769 # now read PATH_INFO and update the parameter list for missing parameters
 770 sub evaluate_path_info {
 771         return if defined $input_params{'project'};
 772         return if !$path_info;
 773         $path_info =~ s,^/+,,;
 774         return if !$path_info;
 775
 776         # find which part of PATH_INFO is project
 777         my $project = $path_info;
 778         $project =~ s,/+$,,;
 779         while ($project && !check_head_link("$projectroot/$project")) {
 780                 $project =~ s,/*[^/]*$,,;
 781         }
 782         return unless $project;
 783         $input_params{'project'} = $project;
 784
 785         # do not change any parameters if an action is given using the query string
 786         return if $input_params{'action'};
 787         $path_info =~ s,^\Q$project\E/*,,;
 788
 789         # next, check if we have an action
 790         my $action = $path_info;
 791         $action =~ s,/.*$,,;
 792         if (exists $actions{$action}) {
 793                 $path_info =~ s,^$action/*,,;
 794                 $input_params{'action'} = $action;
 795         }
 796
 797         # list of actions that want hash_base instead of hash, but can have no
 798         # pathname (f) parameter
 799         my @wants_base = (
 800                 'tree',
 801                 'history',
 802         );
 803
 804         # we want to catch, among others
 805         # [$hash_parent_base[:$file_parent]..]$hash_parent[:$file_name]
 806         my ($parentrefname, $parentpathname, $refname, $pathname) =
 807                 ($path_info =~ /^(?:(.+?)(?::(.+))?\.\.)?([^:]+?)?(?::(.+))?$/);
 808
 809         # first, analyze the 'current' part
 810         if (defined $pathname) {
 811                 # we got "branch:filename" or "branch:dir/"
 812                 # we could use git_get_type(branch:pathname), but:
 813                 # - it needs $git_dir
 814                 # - it does a git() call
 815                 # - the convention of terminating directories with a slash
 816                 #   makes it superfluous
 817                 # - embedding the action in the PATH_INFO would make it even
 818                 #   more superfluous
 819                 $pathname =~ s,^/+,,;
 820                 if (!$pathname || substr($pathname, -1) eq "/") {
 821                         $input_params{'action'} ||= "tree";
 822                         $pathname =~ s,/$,,;
 823                 } else {
 824                         # the default action depends on whether we had parent info
 825                         # or not
 826                         if ($parentrefname) {
 827                                 $input_params{'action'} ||= "blobdiff_plain";
 828                         } else {
 829                                 $input_params{'action'} ||= "blob_plain";
 830                         }
 831                 }
 832                 $input_params{'hash_base'} ||= $refname;
 833                 $input_params{'file_name'} ||= $pathname;
 834         } elsif (defined $refname) {
 835                 # we got "branch". In this case we have to choose if we have to
 836                 # set hash or hash_base.
 837                 #
 838                 # Most of the actions without a pathname only want hash to be
 839                 # set, except for the ones specified in @wants_base that want
 840                 # hash_base instead. It should also be noted that hand-crafted
 841                 # links having 'history' as an action and no pathname or hash
 842                 # set will fail, but that happens regardless of PATH_INFO.
 843                 if (defined $parentrefname) {
 844                         # if there is parent let the default be 'shortlog' action
 845                         # (for http://git.example.com/repo.git/A..B links); if there
 846                         # is no parent, dispatch will detect type of object and set
 847                         # action appropriately if required (if action is not set)
 848                         $input_params{'action'} ||= "shortlog";
 849                 }
 850                 if ($input_params{'action'} &&
 851                     grep { $_ eq $input_params{'action'} } @wants_base) {
 852                         $input_params{'hash_base'} ||= $refname;
 853                 } else {
 854                         $input_params{'hash'} ||= $refname;
 855                 }
 856         }
 857
 858         # next, handle the 'parent' part, if present
 859         if (defined $parentrefname) {
 860                 # a missing pathspec defaults to the 'current' filename, allowing e.g.
 861                 # someproject/blobdiff/oldrev..newrev:/filename
 862                 if ($parentpathname) {
 863                         $parentpathname =~ s,^/+,,;
 864                         $parentpathname =~ s,/$,,;
 865                         $input_params{'file_parent'} ||= $parentpathname;
 866                 } else {
 867                         $input_params{'file_parent'} ||= $input_params{'file_name'};
 868                 }
 869                 # we assume that hash_parent_base is wanted if a path was specified,
 870                 # or if the action wants hash_base instead of hash
 871                 if (defined $input_params{'file_parent'} ||
 872                         grep { $_ eq $input_params{'action'} } @wants_base) {
 873                         $input_params{'hash_parent_base'} ||= $parentrefname;
 874                 } else {
 875                         $input_params{'hash_parent'} ||= $parentrefname;
 876                 }
 877         }
 878
 879         # for the snapshot action, we allow URLs in the form
 880         # $project/snapshot/$hash.ext
 881         # where .ext determines the snapshot and gets removed from the
 882         # passed $refname to provide the $hash.
 883         #
 884         # To be able to tell that $refname includes the format extension, we
 885         # require the following two conditions to be satisfied:
 886         # - the hash input parameter MUST have been set from the $refname part
 887         #   of the URL (i.e. they must be equal)
 888         # - the snapshot format MUST NOT have been defined already (e.g. from
 889         #   CGI parameter sf)
 890         # It's also useless to try any matching unless $refname has a dot,
 891         # so we check for that too
 892         if (defined $input_params{'action'} &&
 893                 $input_params{'action'} eq 'snapshot' &&
 894                 defined $refname && index($refname, '.') != -1 &&
 895                 $refname eq $input_params{'hash'} &&
 896                 !defined $input_params{'snapshot_format'}) {
 897                 # We loop over the known snapshot formats, checking for
 898                 # extensions. Allowed extensions are both the defined suffix
 899                 # (which includes the initial dot already) and the snapshot
 900                 # format key itself, with a prepended dot
 901                 while (my ($fmt, $opt) = each %known_snapshot_formats) {
 902                         my $hash = $refname;
 903                         unless ($hash =~ s/(\Q$opt->{'suffix'}\E|\Q.$fmt\E)$//) {
 904                                 next;
 905                         }
 906                         my $sfx = $1;
 907                         # a valid suffix was found, so set the snapshot format
 908                         # and reset the hash parameter
 909                         $input_params{'snapshot_format'} = $fmt;
 910                         $input_params{'hash'} = $hash;
 911                         # we also set the format suffix to the one requested
 912                         # in the URL: this way a request for e.g. .tgz returns
 913                         # a .tgz instead of a .tar.gz
 914                         $known_snapshot_formats{$fmt}{'suffix'} = $sfx;
 915                         last;
 916                 }
 917         }
 918 }
 919
 920 our ($action, $project, $file_name, $file_parent, $hash, $hash_parent, $hash_base,
 921      $hash_parent_base, @extra_options, $page, $searchtype, $search_use_regexp,
 922      $searchtext, $search_regexp);
 923 sub evaluate_and_validate_params {
 924         our $action = $input_params{'action'};
 925         if (defined $action) {
 926                 if (!validate_action($action)) {
 927                         die_error(400, "Invalid action parameter");
 928                 }
 929         }
 930
 931         # parameters which are pathnames
 932         our $project = $input_params{'project'};
 933         if (defined $project) {
 934                 if (!validate_project($project)) {
 935                         undef $project;
 936                         die_error(404, "No such project");
 937                 }
 938         }
 939
 940         our $file_name = $input_params{'file_name'};
 941         if (defined $file_name) {
 942                 if (!validate_pathname($file_name)) {
 943                         die_error(400, "Invalid file parameter");
 944                 }
 945         }
 946
 947         our $file_parent = $input_params{'file_parent'};
 948         if (defined $file_parent) {
 949                 if (!validate_pathname($file_parent)) {
 950                         die_error(400, "Invalid file parent parameter");
 951                 }
 952         }
 953
 954         # parameters which are refnames
 955         our $hash = $input_params{'hash'};
 956         if (defined $hash) {
 957                 if (!validate_refname($hash)) {
 958                         die_error(400, "Invalid hash parameter");
 959                 }
 960         }
 961
 962         our $hash_parent = $input_params{'hash_parent'};
 963         if (defined $hash_parent) {
 964                 if (!validate_refname($hash_parent)) {
 965                         die_error(400, "Invalid hash parent parameter");
 966                 }
 967         }
 968
 969         our $hash_base = $input_params{'hash_base'};
 970         if (defined $hash_base) {
 971                 if (!validate_refname($hash_base)) {
 972                         die_error(400, "Invalid hash base parameter");
 973                 }
 974         }
 975
 976         our @extra_options = @{$input_params{'extra_options'}};
 977         # @extra_options is always defined, since it can only be (currently) set from
 978         # CGI, and $cgi->param() returns the empty array in array context if the param
 979         # is not set
 980         foreach my $opt (@extra_options) {
 981                 if (not exists $allowed_options{$opt}) {
 982                         die_error(400, "Invalid option parameter");
 983                 }
 984                 if (not grep(/^$action$/, @{$allowed_options{$opt}})) {
 985                         die_error(400, "Invalid option parameter for this action");
 986                 }
 987         }
 988
 989         our $hash_parent_base = $input_params{'hash_parent_base'};
 990         if (defined $hash_parent_base) {
 991                 if (!validate_refname($hash_parent_base)) {
 992                         die_error(400, "Invalid hash parent base parameter");
 993                 }
 994         }
 995
 996         # other parameters
 997         our $page = $input_params{'page'};
 998         if (defined $page) {
 999                 if ($page =~ m/[^0-9]/) {
1000                         die_error(400, "Invalid page parameter");
1001                 }
1002         }
1003
1004         our $searchtype = $input_params{'searchtype'};
1005         if (defined $searchtype) {
1006                 if ($searchtype =~ m/[^a-z]/) {
1007                         die_error(400, "Invalid searchtype parameter");
1008                 }
1009         }
1010
1011         our $search_use_regexp = $input_params{'search_use_regexp'};
1012
1013         our $searchtext = $input_params{'searchtext'};
1014         our $search_regexp;
1015         if (defined $searchtext) {
1016                 if (length($searchtext) < 2) {
1017                         die_error(403, "At least two characters are required for search parameter");
1018                 }
1019                 $search_regexp = $search_use_regexp ? $searchtext : quotemeta $searchtext;
1020         }
1021 }
1022
1023 # path to the current git repository
1024 our $git_dir;
1025 sub evaluate_git_dir {
1026         our $git_dir = "$projectroot/$project" if $project;
1027 }
1028
1029 our (@snapshot_fmts, $git_avatar);
1030 sub configure_gitweb_features {
1031         # list of supported snapshot formats
1032         our @snapshot_fmts = gitweb_get_feature('snapshot');
1033         @snapshot_fmts = filter_snapshot_fmts(@snapshot_fmts);
1034
1035         # check that the avatar feature is set to a known provider name,
1036         # and for each provider check if the dependencies are satisfied.
1037         # if the provider name is invalid or the dependencies are not met,
1038         # reset $git_avatar to the empty string.
1039         our ($git_avatar) = gitweb_get_feature('avatar');
1040         if ($git_avatar eq 'gravatar') {
1041                 $git_avatar = '' unless (eval { require Digest::MD5; 1; });
1042         } elsif ($git_avatar eq 'picon') {
1043                 # no dependencies
1044         } else {
1045                 $git_avatar = '';
1046         }
1047 }
1048
1049 # custom error handler: 'die <message>' is Internal Server Error
1050 sub handle_errors_html {
1051         my $msg = shift; # it is already HTML escaped
1052
1053         # to avoid infinite loop where error occurs in die_error,
1054         # change handler to default handler, disabling handle_errors_html
1055         set_message("Error occured when inside die_error:\n$msg");
1056
1057         # you cannot jump out of die_error when called as error handler;
1058         # the subroutine set via CGI::Carp::set_message is called _after_
1059         # HTTP headers are already written, so it cannot write them itself
1060         die_error(undef, undef, $msg, -error_handler => 1, -no_http_header => 1);
1061 }
1062 set_message(\&handle_errors_html);
1063
1064 # dispatch
1065 sub dispatch {
1066         if (!defined $action) {
1067                 if (defined $hash) {
1068                         $action = git_get_type($hash);
1069                 } elsif (defined $hash_base && defined $file_name) {
1070                         $action = git_get_type("$hash_base:$file_name");
1071                 } elsif (defined $project) {
1072                         $action = 'summary';
1073                 } else {
1074                         $action = 'project_list';
1075                 }
1076         }
1077         if (!defined($actions{$action})) {
1078                 die_error(400, "Unknown action");
1079         }
1080         if ($action !~ m/^(?:opml|project_list|project_index)$/ &&
1081             !$project) {
1082                 die_error(400, "Project needed");
1083         }
1084         $actions{$action}->();
1085 }
1086
1087 sub reset_timer {
1088         our $t0 = [ gettimeofday() ]
1089                 if defined $t0;
1090         our $number_of_git_cmds = 0;
1091 }
1092
1093 our $first_request = 1;
1094 sub run_request {
1095         reset_timer();
1096
1097         evaluate_uri();
1098         if ($first_request) {
1099                 evaluate_gitweb_config();
1100                 evaluate_git_version();
1101         }
1102         if ($per_request_config) {
1103                 if (ref($per_request_config) eq 'CODE') {
1104                         $per_request_config->();
1105                 } elsif (!$first_request) {
1106                         evaluate_gitweb_config();
1107                 }
1108         }
1109         check_loadavg();
1110
1111         # $projectroot and $projects_list might be set in gitweb config file
1112         $projects_list ||= $projectroot;
1113
1114         evaluate_query_params();
1115         evaluate_path_info();
1116         evaluate_and_validate_params();
1117         evaluate_git_dir();
1118
1119         configure_gitweb_features();
1120
1121         dispatch();
1122 }
1123
1124 our $is_last_request = sub { 1 };
1125 our ($pre_dispatch_hook, $post_dispatch_hook, $pre_listen_hook);
1126 our $CGI = 'CGI';
1127 our $cgi;
1128 sub configure_as_fcgi {
1129         require CGI::Fast;
1130         our $CGI = 'CGI::Fast';
1131
1132         my $request_number = 0;
1133         # let each child service 100 requests
1134         our $is_last_request = sub { ++$request_number > 100 };
1135 }
1136 sub evaluate_argv {
1137         my $script_name = $ENV{'SCRIPT_NAME'} || $ENV{'SCRIPT_FILENAME'} || __FILE__;
1138         configure_as_fcgi()
1139                 if $script_name =~ /\.fcgi$/;
1140
1141         return unless (@ARGV);
1142
1143         require Getopt::Long;
1144         Getopt::Long::GetOptions(
1145                 'fastcgi|fcgi|f' => \&configure_as_fcgi,
1146                 'nproc|n=i' => sub {
1147                         my ($arg, $val) = @_;
1148                         return unless eval { require FCGI::ProcManager; 1; };
1149                         my $proc_manager = FCGI::ProcManager->new({
1150                                 n_processes => $val,
1151                         });
1152                         our $pre_listen_hook    = sub { $proc_manager->pm_manage()        };
1153                         our $pre_dispatch_hook  = sub { $proc_manager->pm_pre_dispatch()  };
1154                         our $post_dispatch_hook = sub { $proc_manager->pm_post_dispatch() };
1155                 },
1156         );
1157 }
1158
1159 sub run {
1160         evaluate_argv();
1161
1162         $first_request = 1;
1163         $pre_listen_hook->()
1164                 if $pre_listen_hook;
1165
1166  REQUEST:
1167         while ($cgi = $CGI->new()) {
1168                 $pre_dispatch_hook->()
1169                         if $pre_dispatch_hook;
1170
1171                 run_request();
1172
1173                 $post_dispatch_hook->()
1174                         if $post_dispatch_hook;
1175                 $first_request = 0;
1176
1177                 last REQUEST if ($is_last_request->());
1178         }
1179
1180  DONE_GITWEB:
1181         1;
1182 }
1183
1184 run();
1185
1186 if (defined caller) {
1187         # wrapped in a subroutine processing requests,
1188         # e.g. mod_perl with ModPerl::Registry, or PSGI with Plack::App::WrapCGI
1189         return;
1190 } else {
1191         # pure CGI script, serving single request
1192         exit;
1193 }
1194
1195 ## ======================================================================
1196 ## action links
1197
1198 # possible values of extra options
1199 # -full => 0|1      - use absolute/full URL ($my_uri/$my_url as base)
1200 # -replay => 1      - start from a current view (replay with modifications)
1201 # -path_info => 0|1 - don't use/use path_info URL (if possible)
1202 sub href {
1203         my %params = @_;
1204         # default is to use -absolute url() i.e. $my_uri
1205         my $href = $params{-full} ? $my_url : $my_uri;
1206
1207         $params{'project'} = $project unless exists $params{'project'};
1208
1209         if ($params{-replay}) {
1210                 while (my ($name, $symbol) = each %cgi_param_mapping) {
1211                         if (!exists $params{$name}) {
1212                                 $params{$name} = $input_params{$name};
1213                         }
1214                 }
1215         }
1216
1217         my $use_pathinfo = gitweb_check_feature('pathinfo');
1218         if (defined $params{'project'} &&
1219             (exists $params{-path_info} ? $params{-path_info} : $use_pathinfo)) {
1220                 # try to put as many parameters as possible in PATH_INFO:
1221                 #   - project name
1222                 #   - action
1223                 #   - hash_parent or hash_parent_base:/file_parent
1224                 #   - hash or hash_base:/filename
1225                 #   - the snapshot_format as an appropriate suffix
1226
1227                 # When the script is the root DirectoryIndex for the domain,
1228                 # $href here would be something like http://gitweb.example.com/
1229                 # Thus, we strip any trailing / from $href, to spare us double
1230                 # slashes in the final URL
1231                 $href =~ s,/$,,;
1232
1233                 # Then add the project name, if present
1234                 $href .= "/".esc_url($params{'project'});
1235                 delete $params{'project'};
1236
1237                 # since we destructively absorb parameters, we keep this
1238                 # boolean that remembers if we're handling a snapshot
1239                 my $is_snapshot = $params{'action'} eq 'snapshot';
1240
1241                 # Summary just uses the project path URL, any other action is
1242                 # added to the URL
1243                 if (defined $params{'action'}) {
1244                         $href .= "/".esc_url($params{'action'}) unless $params{'action'} eq 'summary';
1245                         delete $params{'action'};
1246                 }
1247
1248                 # Next, we put hash_parent_base:/file_parent..hash_base:/file_name,
1249                 # stripping nonexistent or useless pieces
1250                 $href .= "/" if ($params{'hash_base'} || $params{'hash_parent_base'}
1251                         || $params{'hash_parent'} || $params{'hash'});
1252                 if (defined $params{'hash_base'}) {
1253                         if (defined $params{'hash_parent_base'}) {
1254                                 $href .= esc_url($params{'hash_parent_base'});
1255                                 # skip the file_parent if it's the same as the file_name
1256                                 if (defined $params{'file_parent'}) {
1257                                         if (defined $params{'file_name'} && $params{'file_parent'} eq $params{'file_name'}) {
1258                                                 delete $params{'file_parent'};
1259                                         } elsif ($params{'file_parent'} !~ /\.\./) {
1260                                                 $href .= ":/".esc_url($params{'file_parent'});
1261                                                 delete $params{'file_parent'};
1262                                         }
1263                                 }
1264                                 $href .= "..";
1265                                 delete $params{'hash_parent'};
1266                                 delete $params{'hash_parent_base'};
1267                         } elsif (defined $params{'hash_parent'}) {
1268                                 $href .= esc_url($params{'hash_parent'}). "..";
1269                                 delete $params{'hash_parent'};
1270                         }
1271
1272                         $href .= esc_url($params{'hash_base'});
1273                         if (defined $params{'file_name'} && $params{'file_name'} !~ /\.\./) {
1274                                 $href .= ":/".esc_url($params{'file_name'});
1275                                 delete $params{'file_name'};
1276                         }
1277                         delete $params{'hash'};
1278                         delete $params{'hash_base'};
1279                 } elsif (defined $params{'hash'}) {
1280                         $href .= esc_url($params{'hash'});
1281                         delete $params{'hash'};
1282                 }
1283
1284                 # If the action was a snapshot, we can absorb the
1285                 # snapshot_format parameter too
1286                 if ($is_snapshot) {
1287                         my $fmt = $params{'snapshot_format'};
1288                         # snapshot_format should always be defined when href()
1289                         # is called, but just in case some code forgets, we
1290                         # fall back to the default
1291                         $fmt ||= $snapshot_fmts[0];
1292                         $href .= $known_snapshot_formats{$fmt}{'suffix'};
1293                         delete $params{'snapshot_format'};
1294                 }
1295         }
1296
1297         # now encode the parameters explicitly
1298         my @result = ();
1299         for (my $i = 0; $i < @cgi_param_mapping; $i += 2) {
1300                 my ($name, $symbol) = ($cgi_param_mapping[$i], $cgi_param_mapping[$i+1]);
1301                 if (defined $params{$name}) {
1302                         if (ref($params{$name}) eq "ARRAY") {
1303                                 foreach my $par (@{$params{$name}}) {
1304                                         push @result, $symbol . "=" . esc_param($par);
1305                                 }
1306                         } else {
1307                                 push @result, $symbol . "=" . esc_param($params{$name});
1308                         }
1309                 }
1310         }
1311         $href .= "?" . join(';', @result) if scalar @result;
1312
1313         return $href;
1314 }
1315
1316
1317 ## ======================================================================
1318 ## validation, quoting/unquoting and escaping
1319
1320 sub validate_action {
1321         my $input = shift || return undef;
1322         return undef unless exists $actions{$input};
1323         return $input;
1324 }
1325
1326 sub validate_project {
1327         my $input = shift || return undef;
1328         if (!validate_pathname($input) ||
1329                 !(-d "$projectroot/$input") ||
1330                 !check_export_ok("$projectroot/$input") ||
1331                 ($strict_export && !project_in_list($input))) {
1332                 return undef;
1333         } else {
1334                 return $input;
1335         }
1336 }
1337
1338 sub validate_pathname {
1339         my $input = shift || return undef;
1340
1341         # no '.' or '..' as elements of path, i.e. no '.' nor '..'
1342         # at the beginning, at the end, and between slashes.
1343         # also this catches doubled slashes
1344         if ($input =~ m!(^|/)(|\.|\.\.)(/|$)!) {
1345                 return undef;
1346         }
1347         # no null characters
1348         if ($input =~ m!\0!) {
1349                 return undef;
1350         }
1351         return $input;
1352 }
1353
1354 sub validate_refname {
1355         my $input = shift || return undef;
1356
1357         # textual hashes are O.K.
1358         if ($input =~ m/^[0-9a-fA-F]{40}$/) {
1359                 return $input;
1360         }
1361         # it must be correct pathname
1362         $input = validate_pathname($input)
1363                 or return undef;
1364         # restrictions on ref name according to git-check-ref-format
1365         if ($input =~ m!(/\.|\.\.|[\000-\040\177 ~^:?*\[]|/$)!) {
1366                 return undef;
1367         }
1368         return $input;
1369 }
1370
1371 # decode sequences of octets in utf8 into Perl's internal form,
1372 # which is utf-8 with utf8 flag set if needed.  gitweb writes out
1373 # in utf-8 thanks to "binmode STDOUT, ':utf8'" at beginning
1374 sub to_utf8 {
1375         my $str = shift;
1376         return undef unless defined $str;
1377         if (utf8::valid($str)) {
1378                 utf8::decode($str);
1379                 return $str;
1380         } else {
1381                 return decode($fallback_encoding, $str, Encode::FB_DEFAULT);
1382         }
1383 }
1384
1385 # quote unsafe chars, but keep the slash, even when it's not
1386 # correct, but quoted slashes look too horrible in bookmarks
1387 sub esc_param {
1388         my $str = shift;
1389         return undef unless defined $str;
1390         $str =~ s/([^A-Za-z0-9\-_.~()\/:@ ]+)/CGI::escape($1)/eg;
1391         $str =~ s/ /\+/g;
1392         return $str;
1393 }
1394
1395 # quote unsafe chars in whole URL, so some characters cannot be quoted
1396 sub esc_url {
1397         my $str = shift;
1398         return undef unless defined $str;
1399         $str =~ s/([^A-Za-z0-9\-_.~();\/;?:@&= ]+)/CGI::escape($1)/eg;
1400         $str =~ s/ /\+/g;
1401         return $str;
1402 }
1403
1404 # replace invalid utf8 character with SUBSTITUTION sequence
1405 sub esc_html {
1406         my $str = shift;
1407         my %opts = @_;
1408
1409         return undef unless defined $str;
1410
1411         $str = to_utf8($str);
1412         $str = $cgi->escapeHTML($str);
1413         if ($opts{'-nbsp'}) {
1414                 $str =~ s/ /&nbsp;/g;
1415         }
1416         $str =~ s|([[:cntrl:]])|(($1 ne "\t") ? quot_cec($1) : $1)|eg;
1417         return $str;
1418 }
1419
1420 # quote control characters and escape filename to HTML
1421 sub esc_path {
1422         my $str = shift;
1423         my %opts = @_;
1424
1425         return undef unless defined $str;
1426
1427         $str = to_utf8($str);
1428         $str = $cgi->escapeHTML($str);
1429         if ($opts{'-nbsp'}) {
1430                 $str =~ s/ /&nbsp;/g;
1431         }
1432         $str =~ s|([[:cntrl:]])|quot_cec($1)|eg;
1433         return $str;
1434 }
1435
1436 # Make control characters "printable", using character escape codes (CEC)
1437 sub quot_cec {
1438         my $cntrl = shift;
1439         my %opts = @_;
1440         my %es = ( # character escape codes, aka escape sequences
1441                 "\t" => '\t',   # tab            (HT)
1442                 "\n" => '\n',   # line feed      (LF)
1443                 "\r" => '\r',   # carrige return (CR)
1444                 "\f" => '\f',   # form feed      (FF)
1445                 "\b" => '\b',   # backspace      (BS)
1446                 "\a" => '\a',   # alarm (bell)   (BEL)
1447                 "\e" => '\e',   # escape         (ESC)
1448                 "\013" => '\v', # vertical tab   (VT)
1449                 "\000" => '\0', # nul character  (NUL)
1450         );
1451         my $chr = ( (exists $es{$cntrl})
1452                     ? $es{$cntrl}
1453                     : sprintf('\%2x', ord($cntrl)) );
1454         if ($opts{-nohtml}) {
1455                 return $chr;
1456         } else {
1457                 return "<span class=\"cntrl\">$chr</span>";
1458         }
1459 }
1460
1461 # Alternatively use unicode control pictures codepoints,
1462 # Unicode "printable representation" (PR)
1463 sub quot_upr {
1464         my $cntrl = shift;
1465         my %opts = @_;
1466
1467         my $chr = sprintf('&#%04d;', 0x2400+ord($cntrl));
1468         if ($opts{-nohtml}) {
1469                 return $chr;
1470         } else {
1471                 return "<span class=\"cntrl\">$chr</span>";
1472         }
1473 }
1474
1475 # git may return quoted and escaped filenames
1476 sub unquote {
1477         my $str = shift;
1478
1479         sub unq {
1480                 my $seq = shift;
1481                 my %es = ( # character escape codes, aka escape sequences
1482                         't' => "\t",   # tab            (HT, TAB)
1483                         'n' => "\n",   # newline        (NL)
1484                         'r' => "\r",   # return         (CR)
1485                         'f' => "\f",   # form feed      (FF)
1486                         'b' => "\b",   # backspace      (BS)
1487                         'a' => "\a",   # alarm (bell)   (BEL)
1488                         'e' => "\e",   # escape         (ESC)
1489                         'v' => "\013", # vertical tab   (VT)
1490                 );
1491
1492                 if ($seq =~ m/^[0-7]{1,3}$/) {
1493                         # octal char sequence
1494                         return chr(oct($seq));
1495                 } elsif (exists $es{$seq}) {
1496                         # C escape sequence, aka character escape code
1497                         return $es{$seq};
1498                 }
1499                 # quoted ordinary character
1500                 return $seq;
1501         }
1502
1503         if ($str =~ m/^"(.*)"$/) {
1504                 # needs unquoting
1505                 $str = $1;
1506                 $str =~ s/\\([^0-7]|[0-7]{1,3})/unq($1)/eg;
1507         }
1508         return $str;
1509 }
1510
1511 # escape tabs (convert tabs to spaces)
1512 sub untabify {
1513         my $line = shift;
1514
1515         while ((my $pos = index($line, "\t")) != -1) {
1516                 if (my $count = (8 - ($pos % 8))) {
1517                         my $spaces = ' ' x $count;
1518                         $line =~ s/\t/$spaces/;
1519                 }
1520         }
1521
1522         return $line;
1523 }
1524
1525 sub project_in_list {
1526         my $project = shift;
1527         my @list = git_get_projects_list();
1528         return @list && scalar(grep { $_->{'path'} eq $project } @list);
1529 }
1530
1531 ## ----------------------------------------------------------------------
1532 ## HTML aware string manipulation
1533
1534 # Try to chop given string on a word boundary between position
1535 # $len and $len+$add_len. If there is no word boundary there,
1536 # chop at $len+$add_len. Do not chop if chopped part plus ellipsis
1537 # (marking chopped part) would be longer than given string.
1538 sub chop_str {
1539         my $str = shift;
1540         my $len = shift;
1541         my $add_len = shift || 10;
1542         my $where = shift || 'right'; # 'left' | 'center' | 'right'
1543
1544         # Make sure perl knows it is utf8 encoded so we don't
1545         # cut in the middle of a utf8 multibyte char.
1546         $str = to_utf8($str);
1547
1548         # allow only $len chars, but don't cut a word if it would fit in $add_len
1549         # if it doesn't fit, cut it if it's still longer than the dots we would add
1550         # remove chopped character entities entirely
1551
1552         # when chopping in the middle, distribute $len into left and right part
1553         # return early if chopping wouldn't make string shorter
1554         if ($where eq 'center') {
1555                 return $str if ($len + 5 >= length($str)); # filler is length 5
1556                 $len = int($len/2);
1557         } else {
1558                 return $str if ($len + 4 >= length($str)); # filler is length 4
1559         }
1560
1561         # regexps: ending and beginning with word part up to $add_len
1562         my $endre = qr/.{$len}\w{0,$add_len}/;
1563         my $begre = qr/\w{0,$add_len}.{$len}/;
1564
1565         if ($where eq 'left') {
1566                 $str =~ m/^(.*?)($begre)$/;
1567                 my ($lead, $body) = ($1, $2);
1568                 if (length($lead) > 4) {
1569                         $lead = " ...";
1570                 }
1571                 return "$lead$body";
1572
1573         } elsif ($where eq 'center') {
1574                 $str =~ m/^($endre)(.*)$/;
1575                 my ($left, $str)  = ($1, $2);
1576                 $str =~ m/^(.*?)($begre)$/;
1577                 my ($mid, $right) = ($1, $2);
1578                 if (length($mid) > 5) {
1579                         $mid = " ... ";
1580                 }
1581                 return "$left$mid$right";
1582
1583         } else {
1584                 $str =~ m/^($endre)(.*)$/;
1585                 my $body = $1;
1586                 my $tail = $2;
1587                 if (length($tail) > 4) {
1588                         $tail = "... ";
1589                 }
1590                 return "$body$tail";
1591         }
1592 }
1593
1594 # takes the same arguments as chop_str, but also wraps a <span> around the
1595 # result with a title attribute if it does get chopped. Additionally, the
1596 # string is HTML-escaped.
1597 sub chop_and_escape_str {
1598         my ($str) = @_;
1599
1600         my $chopped = chop_str(@_);
1601         if ($chopped eq $str) {
1602                 return esc_html($chopped);
1603         } else {
1604                 $str =~ s/[[:cntrl:]]/?/g;
1605                 return $cgi->span({-title=>$str}, esc_html($chopped));
1606         }
1607 }
1608
1609 ## ----------------------------------------------------------------------
1610 ## functions returning short strings
1611
1612 # CSS class for given age value (in seconds)
1613 sub age_class {
1614         my $age = shift;
1615
1616         if (!defined $age) {
1617                 return "noage";
1618         } elsif ($age < 60*60*2) {
1619                 return "age0";
1620         } elsif ($age < 60*60*24*2) {
1621                 return "age1";
1622         } else {
1623                 return "age2";
1624         }
1625 }
1626
1627 # convert age in seconds to "nn units ago" string
1628 sub age_string {
1629         my $age = shift;
1630         my $age_str;
1631
1632         if ($age > 60*60*24*365*2) {
1633                 $age_str = (int $age/60/60/24/365);
1634                 $age_str .= " years ago";
1635         } elsif ($age > 60*60*24*(365/12)*2) {
1636                 $age_str = int $age/60/60/24/(365/12);
1637                 $age_str .= " months ago";
1638         } elsif ($age > 60*60*24*7*2) {
1639                 $age_str = int $age/60/60/24/7;
1640                 $age_str .= " weeks ago";
1641         } elsif ($age > 60*60*24*2) {
1642                 $age_str = int $age/60/60/24;
1643                 $age_str .= " days ago";
1644         } elsif ($age > 60*60*2) {
1645                 $age_str = int $age/60/60;
1646                 $age_str .= " hours ago";
1647         } elsif ($age > 60*2) {
1648                 $age_str = int $age/60;
1649                 $age_str .= " min ago";
1650         } elsif ($age > 2) {
1651                 $age_str = int $age;
1652                 $age_str .= " sec ago";
1653         } else {
1654                 $age_str .= " right now";
1655         }
1656         return $age_str;
1657 }
1658
1659 use constant {
1660         S_IFINVALID => 0030000,
1661         S_IFGITLINK => 0160000,
1662 };
1663
1664 # submodule/subproject, a commit object reference
1665 sub S_ISGITLINK {
1666         my $mode = shift;
1667
1668         return (($mode & S_IFMT) == S_IFGITLINK)
1669 }
1670
1671 # convert file mode in octal to symbolic file mode string
1672 sub mode_str {
1673         my $mode = oct shift;
1674
1675         if (S_ISGITLINK($mode)) {
1676                 return 'm---------';
1677         } elsif (S_ISDIR($mode & S_IFMT)) {
1678                 return 'drwxr-xr-x';
1679         } elsif (S_ISLNK($mode)) {
1680                 return 'lrwxrwxrwx';
1681         } elsif (S_ISREG($mode)) {
1682                 # git cares only about the executable bit
1683                 if ($mode & S_IXUSR) {
1684                         return '-rwxr-xr-x';
1685                 } else {
1686                         return '-rw-r--r--';
1687                 };
1688         } else {
1689                 return '----------';
1690         }
1691 }
1692
1693 # convert file mode in octal to file type string
1694 sub file_type {
1695         my $mode = shift;
1696
1697         if ($mode !~ m/^[0-7]+$/) {
1698                 return $mode;
1699         } else {
1700                 $mode = oct $mode;
1701         }
1702
1703         if (S_ISGITLINK($mode)) {
1704                 return "submodule";
1705         } elsif (S_ISDIR($mode & S_IFMT)) {
1706                 return "directory";
1707         } elsif (S_ISLNK($mode)) {
1708                 return "symlink";
1709         } elsif (S_ISREG($mode)) {
1710                 return "file";
1711         } else {
1712                 return "unknown";
1713         }
1714 }
1715
1716 # convert file mode in octal to file type description string
1717 sub file_type_long {
1718         my $mode = shift;
1719
1720         if ($mode !~ m/^[0-7]+$/) {
1721                 return $mode;
1722         } else {
1723                 $mode = oct $mode;
1724         }
1725
1726         if (S_ISGITLINK($mode)) {
1727                 return "submodule";
1728         } elsif (S_ISDIR($mode & S_IFMT)) {
1729                 return "directory";
1730         } elsif (S_ISLNK($mode)) {
1731                 return "symlink";
1732         } elsif (S_ISREG($mode)) {
1733                 if ($mode & S_IXUSR) {
1734                         return "executable";
1735                 } else {
1736                         return "file";
1737                 };
1738         } else {
1739                 return "unknown";
1740         }
1741 }
1742
1743
1744 ## ----------------------------------------------------------------------
1745 ## functions returning short HTML fragments, or transforming HTML fragments
1746 ## which don't belong to other sections
1747
1748 # format line of commit message.
1749 sub format_log_line_html {
1750         my $line = shift;
1751
1752         $line = esc_html($line, -nbsp=>1);
1753         $line =~ s{\b([0-9a-fA-F]{8,40})\b}{
1754                 $cgi->a({-href => href(action=>"object", hash=>$1),
1755                                         -class => "text"}, $1);
1756         }eg;
1757
1758         return $line;
1759 }
1760
1761 # format marker of refs pointing to given object
1762
1763 # the destination action is chosen based on object type and current context:
1764 # - for annotated tags, we choose the tag view unless it's the current view
1765 #   already, in which case we go to shortlog view
1766 # - for other refs, we keep the current view if we're in history, shortlog or
1767 #   log view, and select shortlog otherwise
1768 sub format_ref_marker {
1769         my ($refs, $id) = @_;
1770         my $markers = '';
1771
1772         if (defined $refs->{$id}) {
1773                 foreach my $ref (@{$refs->{$id}}) {
1774                         # this code exploits the fact that non-lightweight tags are the
1775                         # only indirect objects, and that they are the only objects for which
1776                         # we want to use tag instead of shortlog as action
1777                         my ($type, $name) = qw();
1778                         my $indirect = ($ref =~ s/\^\{\}$//);
1779                         # e.g. tags/v2.6.11 or heads/next
1780                         if ($ref =~ m!^(.*?)s?/(.*)$!) {
1781                                 $type = $1;
1782                                 $name = $2;
1783                         } else {
1784                                 $type = "ref";
1785                                 $name = $ref;
1786                         }
1787
1788                         my $class = $type;
1789                         $class .= " indirect" if $indirect;
1790
1791                         my $dest_action = "shortlog";
1792
1793                         if ($indirect) {
1794                                 $dest_action = "tag" unless $action eq "tag";
1795                         } elsif ($action =~ /^(history|(short)?log)$/) {
1796                                 $dest_action = $action;
1797                         }
1798
1799                         my $dest = "";
1800                         $dest .= "refs/" unless $ref =~ m!^refs/!;
1801                         $dest .= $ref;
1802
1803                         my $link = $cgi->a({
1804                                 -href => href(
1805                                         action=>$dest_action,
1806                                         hash=>$dest
1807                                 )}, $name);
1808
1809                         $markers .= " <span class=\"$class\" title=\"$ref\">" .
1810                                 $link . "</span>";
1811                 }
1812         }
1813
1814         if ($markers) {
1815                 return ' <span class="refs">'. $markers . '</span>';
1816         } else {
1817                 return "";
1818         }
1819 }
1820
1821 # format, perhaps shortened and with markers, title line
1822 sub format_subject_html {
1823         my ($long, $short, $href, $extra) = @_;
1824         $extra = '' unless defined($extra);
1825
1826         if (length($short) < length($long)) {
1827                 $long =~ s/[[:cntrl:]]/?/g;
1828                 return $cgi->a({-href => $href, -class => "list subject",
1829                                 -title => to_utf8($long)},
1830                        esc_html($short)) . $extra;
1831         } else {
1832                 return $cgi->a({-href => $href, -class => "list subject"},
1833                        esc_html($long)) . $extra;
1834         }
1835 }
1836
1837 # Rather than recomputing the url for an email multiple times, we cache it
1838 # after the first hit. This gives a visible benefit in views where the avatar
1839 # for the same email is used repeatedly (e.g. shortlog).
1840 # The cache is shared by all avatar engines (currently gravatar only), which
1841 # are free to use it as preferred. Since only one avatar engine is used for any
1842 # given page, there's no risk for cache conflicts.
1843 our %avatar_cache = ();
1844
1845 # Compute the picon url for a given email, by using the picon search service over at
1846 # http://www.cs.indiana.edu/picons/search.html
1847 sub picon_url {
1848         my $email = lc shift;
1849         if (!$avatar_cache{$email}) {
1850                 my ($user, $domain) = split('@', $email);
1851                 $avatar_cache{$email} =
1852                         "http://www.cs.indiana.edu/cgi-pub/kinzler/piconsearch.cgi/" .
1853                         "$domain/$user/" .
1854                         "users+domains+unknown/up/single";
1855         }
1856         return $avatar_cache{$email};
1857 }
1858
1859 # Compute the gravatar url for a given email, if it's not in the cache already.
1860 # Gravatar stores only the part of the URL before the size, since that's the
1861 # one computationally more expensive. This also allows reuse of the cache for
1862 # different sizes (for this particular engine).
1863 sub gravatar_url {
1864         my $email = lc shift;
1865         my $size = shift;
1866         $avatar_cache{$email} ||=
1867                 "http://www.gravatar.com/avatar/" .
1868                         Digest::MD5::md5_hex($email) . "?s=";
1869         return $avatar_cache{$email} . $size;
1870 }
1871
1872 # Insert an avatar for the given $email at the given $size if the feature
1873 # is enabled.
1874 sub git_get_avatar {
1875         my ($email, %opts) = @_;
1876         my $pre_white  = ($opts{-pad_before} ? "&nbsp;" : "");
1877         my $post_white = ($opts{-pad_after}  ? "&nbsp;" : "");
1878         $opts{-size} ||= 'default';
1879         my $size = $avatar_size{$opts{-size}} || $avatar_size{'default'};
1880         my $url = "";
1881         if ($git_avatar eq 'gravatar') {
1882                 $url = gravatar_url($email, $size);
1883         } elsif ($git_avatar eq 'picon') {
1884                 $url = picon_url($email);
1885         }
1886         # Other providers can be added by extending the if chain, defining $url
1887         # as needed. If no variant puts something in $url, we assume avatars
1888         # are completely disabled/unavailable.
1889         if ($url) {
1890                 return $pre_white .
1891                        "<img width=\"$size\" " .
1892                             "class=\"avatar\" " .
1893                             "src=\"$url\" " .
1894                             "alt=\"\" " .
1895                        "/>" . $post_white;
1896         } else {
1897                 return "";
1898         }
1899 }
1900
1901 sub format_search_author {
1902         my ($author, $searchtype, $displaytext) = @_;
1903         my $have_search = gitweb_check_feature('search');
1904
1905         if ($have_search) {
1906                 my $performed = "";
1907                 if ($searchtype eq 'author') {
1908                         $performed = "authored";
1909                 } elsif ($searchtype eq 'committer') {
1910                         $performed = "committed";
1911                 }
1912
1913                 return $cgi->a({-href => href(action=>"search", hash=>$hash,
1914                                 searchtext=>$author,
1915                                 searchtype=>$searchtype), class=>"list",
1916                                 title=>"Search for commits $performed by $author"},
1917                                 $displaytext);
1918
1919         } else {
1920                 return $displaytext;
1921         }
1922 }
1923
1924 # format the author name of the given commit with the given tag
1925 # the author name is chopped and escaped according to the other
1926 # optional parameters (see chop_str).
1927 sub format_author_html {
1928         my $tag = shift;
1929         my $co = shift;
1930         my $author = chop_and_escape_str($co->{'author_name'}, @_);
1931         return "<$tag class=\"author\">" .
1932                format_search_author($co->{'author_name'}, "author",
1933                        git_get_avatar($co->{'author_email'}, -pad_after => 1) .
1934                        $author) .
1935                "</$tag>";
1936 }
1937
1938 # format git diff header line, i.e. "diff --(git|combined|cc) ..."
1939 sub format_git_diff_header_line {
1940         my $line = shift;
1941         my $diffinfo = shift;
1942         my ($from, $to) = @_;
1943
1944         if ($diffinfo->{'nparents'}) {
1945                 # combined diff
1946                 $line =~ s!^(diff (.*?) )"?.*$!$1!;
1947                 if ($to->{'href'}) {
1948                         $line .= $cgi->a({-href => $to->{'href'}, -class => "path"},
1949                                          esc_path($to->{'file'}));
1950                 } else { # file was deleted (no href)
1951                         $line .= esc_path($to->{'file'});
1952                 }
1953         } else {
1954                 # "ordinary" diff
1955                 $line =~ s!^(diff (.*?) )"?a/.*$!$1!;
1956                 if ($from->{'href'}) {
1957                         $line .= $cgi->a({-href => $from->{'href'}, -class => "path"},
1958                                          'a/' . esc_path($from->{'file'}));
1959                 } else { # file was added (no href)
1960                         $line .= 'a/' . esc_path($from->{'file'});
1961                 }
1962                 $line .= ' ';
1963                 if ($to->{'href'}) {
1964                         $line .= $cgi->a({-href => $to->{'href'}, -class => "path"},
1965                                          'b/' . esc_path($to->{'file'}));
1966                 } else { # file was deleted
1967                         $line .= 'b/' . esc_path($to->{'file'});
1968                 }
1969         }
1970
1971         return "<div class=\"diff header\">$line</div>\n";
1972 }
1973
1974 # format extended diff header line, before patch itself
1975 sub format_extended_diff_header_line {
1976         my $line = shift;
1977         my $diffinfo = shift;
1978         my ($from, $to) = @_;
1979
1980         # match <path>
1981         if ($line =~ s!^((copy|rename) from ).*$!$1! && $from->{'href'}) {
1982                 $line .= $cgi->a({-href=>$from->{'href'}, -class=>"path"},
1983                                        esc_path($from->{'file'}));
1984         }
1985         if ($line =~ s!^((copy|rename) to ).*$!$1! && $to->{'href'}) {
1986                 $line .= $cgi->a({-href=>$to->{'href'}, -class=>"path"},
1987                                  esc_path($to->{'file'}));
1988         }
1989         # match single <mode>
1990         if ($line =~ m/\s(\d{6})$/) {
1991                 $line .= '<span class="info"> (' .
1992                          file_type_long($1) .
1993                          ')</span>';
1994         }
1995         # match <hash>
1996         if ($line =~ m/^index [0-9a-fA-F]{40},[0-9a-fA-F]{40}/) {
1997                 # can match only for combined diff
1998                 $line = 'index ';
1999                 for (my $i = 0; $i < $diffinfo->{'nparents'}; $i++) {
2000                         if ($from->{'href'}[$i]) {
2001                                 $line .= $cgi->a({-href=>$from->{'href'}[$i],
2002                                                   -class=>"hash"},
2003                                                  substr($diffinfo->{'from_id'}[$i],0,7));
2004                         } else {
2005                                 $line .= '0' x 7;
2006                         }
2007                         # separator
2008                         $line .= ',' if ($i < $diffinfo->{'nparents'} - 1);
2009                 }
2010                 $line .= '..';
2011                 if ($to->{'href'}) {
2012                         $line .= $cgi->a({-href=>$to->{'href'}, -class=>"hash"},
2013                                          substr($diffinfo->{'to_id'},0,7));
2014                 } else {
2015                         $line .= '0' x 7;
2016                 }
2017
2018         } elsif ($line =~ m/^index [0-9a-fA-F]{40}..[0-9a-fA-F]{40}/) {
2019                 # can match only for ordinary diff
2020                 my ($from_link, $to_link);
2021                 if ($from->{'href'}) {
2022                         $from_link = $cgi->a({-href=>$from->{'href'}, -class=>"hash"},
2023                                              substr($diffinfo->{'from_id'},0,7));
2024                 } else {
2025                         $from_link = '0' x 7;
2026                 }
2027                 if ($to->{'href'}) {
2028                         $to_link = $cgi->a({-href=>$to->{'href'}, -class=>"hash"},
2029                                            substr($diffinfo->{'to_id'},0,7));
2030                 } else {
2031                         $to_link = '0' x 7;
2032                 }
2033                 my ($from_id, $to_id) = ($diffinfo->{'from_id'}, $diffinfo->{'to_id'});
2034                 $line =~ s!$from_id\.\.$to_id!$from_link..$to_link!;
2035         }
2036
2037         return $line . "<br/>\n";
2038 }
2039
2040 # format from-file/to-file diff header
2041 sub format_diff_from_to_header {
2042         my ($from_line, $to_line, $diffinfo, $from, $to, @parents) = @_;
2043         my $line;
2044         my $result = '';
2045
2046         $line = $from_line;
2047         #assert($line =~ m/^---/) if DEBUG;
2048         # no extra formatting for "^--- /dev/null"
2049         if (! $diffinfo->{'nparents'}) {
2050                 # ordinary (single parent) diff
2051                 if ($line =~ m!^--- "?a/!) {
2052                         if ($from->{'href'}) {
2053                                 $line = '--- a/' .
2054                                         $cgi->a({-href=>$from->{'href'}, -class=>"path"},
2055                                                 esc_path($from->{'file'}));
2056                         } else {
2057                                 $line = '--- a/' .
2058                                         esc_path($from->{'file'});
2059                         }
2060                 }
2061                 $result .= qq!<div class="diff from_file">$line</div>\n!;
2062
2063         } else {
2064                 # combined diff (merge commit)
2065                 for (my $i = 0; $i < $diffinfo->{'nparents'}; $i++) {
2066                         if ($from->{'href'}[$i]) {
2067                                 $line = '--- ' .
2068                                         $cgi->a({-href=>href(action=>"blobdiff",
2069                                                              hash_parent=>$diffinfo->{'from_id'}[$i],
2070                                                              hash_parent_base=>$parents[$i],
2071                                                              file_parent=>$from->{'file'}[$i],
2072                                                              hash=>$diffinfo->{'to_id'},
2073                                                              hash_base=>$hash,
2074                                                              file_name=>$to->{'file'}),
2075                                                  -class=>"path",
2076                                                  -title=>"diff" . ($i+1)},
2077                                                 $i+1) .
2078                                         '/' .
2079                                         $cgi->a({-href=>$from->{'href'}[$i], -class=>"path"},
2080                                                 esc_path($from->{'file'}[$i]));
2081                         } else {
2082                                 $line = '--- /dev/null';
2083                         }
2084                         $result .= qq!<div class="diff from_file">$line</div>\n!;
2085                 }
2086         }
2087
2088         $line = $to_line;
2089         #assert($line =~ m/^\+\+\+/) if DEBUG;
2090         # no extra formatting for "^+++ /dev/null"
2091         if ($line =~ m!^\+\+\+ "?b/!) {
2092                 if ($to->{'href'}) {
2093                         $line = '+++ b/' .
2094                                 $cgi->a({-href=>$to->{'href'}, -class=>"path"},
2095                                         esc_path($to->{'file'}));
2096                 } else {
2097                         $line = '+++ b/' .
2098                                 esc_path($to->{'file'});
2099                 }
2100         }
2101         $result .= qq!<div class="diff to_file">$line</div>\n!;
2102
2103         return $result;
2104 }
2105
2106 # create note for patch simplified by combined diff
2107 sub format_diff_cc_simplified {
2108         my ($diffinfo, @parents) = @_;
2109         my $result = '';
2110
2111         $result .= "<div class=\"diff header\">" .
2112                    "diff --cc ";
2113         if (!is_deleted($diffinfo)) {
2114                 $result .= $cgi->a({-href => href(action=>"blob",
2115                                                   hash_base=>$hash,
2116                                                   hash=>$diffinfo->{'to_id'},
2117                                                   file_name=>$diffinfo->{'to_file'}),
2118                                     -class => "path"},
2119                                    esc_path($diffinfo->{'to_file'}));
2120         } else {
2121                 $result .= esc_path($diffinfo->{'to_file'});
2122         }
2123         $result .= "</div>\n" . # class="diff header"
2124                    "<div class=\"diff nodifferences\">" .
2125                    "Simple merge" .
2126                    "</div>\n"; # class="diff nodifferences"
2127
2128         return $result;
2129 }
2130
2131 # format patch (diff) line (not to be used for diff headers)
2132 sub format_diff_line {
2133         my $line = shift;
2134         my ($from, $to) = @_;
2135         my $diff_class = "";
2136
2137         chomp $line;
2138
2139         if ($from && $to && ref($from->{'href'}) eq "ARRAY") {
2140                 # combined diff
2141                 my $prefix = substr($line, 0, scalar @{$from->{'href'}});
2142                 if ($line =~ m/^\@{3}/) {
2143                         $diff_class = " chunk_header";
2144                 } elsif ($line =~ m/^\\/) {
2145                         $diff_class = " incomplete";
2146                 } elsif ($prefix =~ tr/+/+/) {
2147                         $diff_class = " add";
2148                 } elsif ($prefix =~ tr/-/-/) {
2149                         $diff_class = " rem";
2150                 }
2151         } else {
2152                 # assume ordinary diff
2153                 my $char = substr($line, 0, 1);
2154                 if ($char eq '+') {
2155                         $diff_class = " add";
2156                 } elsif ($char eq '-') {
2157                         $diff_class = " rem";
2158                 } elsif ($char eq '@') {
2159                         $diff_class = " chunk_header";
2160                 } elsif ($char eq "\\") {
2161                         $diff_class = " incomplete";
2162                 }
2163         }
2164         $line = untabify($line);
2165         if ($from && $to && $line =~ m/^\@{2} /) {
2166                 my ($from_text, $from_start, $from_lines, $to_text, $to_start, $to_lines, $section) =
2167                         $line =~ m/^\@{2} (-(\d+)(?:,(\d+))?) (\+(\d+)(?:,(\d+))?) \@{2}(.*)$/;
2168
2169                 $from_lines = 0 unless defined $from_lines;
2170                 $to_lines   = 0 unless defined $to_lines;
2171
2172                 if ($from->{'href'}) {
2173                         $from_text = $cgi->a({-href=>"$from->{'href'}#l$from_start",
2174                                              -class=>"list"}, $from_text);
2175                 }
2176                 if ($to->{'href'}) {
2177                         $to_text   = $cgi->a({-href=>"$to->{'href'}#l$to_start",
2178                                              -class=>"list"}, $to_text);
2179                 }
2180                 $line = "<span class=\"chunk_info\">@@ $from_text $to_text @@</span>" .
2181                         "<span class=\"section\">" . esc_html($section, -nbsp=>1) . "</span>";
2182                 return "<div class=\"diff$diff_class\">$line</div>\n";
2183         } elsif ($from && $to && $line =~ m/^\@{3}/) {
2184                 my ($prefix, $ranges, $section) = $line =~ m/^(\@+) (.*?) \@+(.*)$/;
2185                 my (@from_text, @from_start, @from_nlines, $to_text, $to_start, $to_nlines);
2186
2187                 @from_text = split(' ', $ranges);
2188                 for (my $i = 0; $i < @from_text; ++$i) {
2189                         ($from_start[$i], $from_nlines[$i]) =
2190                                 (split(',', substr($from_text[$i], 1)), 0);
2191                 }
2192
2193                 $to_text   = pop @from_text;
2194                 $to_start  = pop @from_start;
2195                 $to_nlines = pop @from_nlines;
2196
2197                 $line = "<span class=\"chunk_info\">$prefix ";
2198                 for (my $i = 0; $i < @from_text; ++$i) {
2199                         if ($from->{'href'}[$i]) {
2200                                 $line .= $cgi->a({-href=>"$from->{'href'}[$i]#l$from_start[$i]",
2201                                                   -class=>"list"}, $from_text[$i]);
2202                         } else {
2203                                 $line .= $from_text[$i];
2204                         }
2205                         $line .= " ";
2206                 }
2207                 if ($to->{'href'}) {
2208                         $line .= $cgi->a({-href=>"$to->{'href'}#l$to_start",
2209                                           -class=>"list"}, $to_text);
2210                 } else {
2211                         $line .= $to_text;
2212                 }
2213                 $line .= " $prefix</span>" .
2214                          "<span class=\"section\">" . esc_html($section, -nbsp=>1) . "</span>";
2215                 return "<div class=\"diff$diff_class\">$line</div>\n";
2216         }
2217         return "<div class=\"diff$diff_class\">" . esc_html($line, -nbsp=>1) . "</div>\n";
2218 }
2219
2220 # Generates undef or something like "_snapshot_" or "snapshot (_tbz2_ _zip_)",
2221 # linked.  Pass the hash of the tree/commit to snapshot.
2222 sub format_snapshot_links {
2223         my ($hash) = @_;
2224         my $num_fmts = @snapshot_fmts;
2225         if ($num_fmts > 1) {
2226                 # A parenthesized list of links bearing format names.
2227                 # e.g. "snapshot (_tar.gz_ _zip_)"
2228                 return "snapshot (" . join(' ', map
2229                         $cgi->a({
2230                                 -href => href(
2231                                         action=>"snapshot",
2232                                         hash=>$hash,
2233                                         snapshot_format=>$_
2234                                 )
2235                         }, $known_snapshot_formats{$_}{'display'})
2236                 , @snapshot_fmts) . ")";
2237         } elsif ($num_fmts == 1) {
2238                 # A single "snapshot" link whose tooltip bears the format name.
2239                 # i.e. "_snapshot_"
2240                 my ($fmt) = @snapshot_fmts;
2241                 return
2242                         $cgi->a({
2243                                 -href => href(
2244                                         action=>"snapshot",
2245                                         hash=>$hash,
2246                                         snapshot_format=>$fmt
2247                                 ),
2248                                 -title => "in format: $known_snapshot_formats{$fmt}{'display'}"
2249                         }, "snapshot");
2250         } else { # $num_fmts == 0
2251                 return undef;
2252         }
2253 }
2254
2255 ## ......................................................................
2256 ## functions returning values to be passed, perhaps after some
2257 ## transformation, to other functions; e.g. returning arguments to href()
2258
2259 # returns hash to be passed to href to generate gitweb URL
2260 # in -title key it returns description of link
2261 sub get_feed_info {
2262         my $format = shift || 'Atom';
2263         my %res = (action => lc($format));
2264
2265         # feed links are possible only for project views
2266         return unless (defined $project);
2267         # some views should link to OPML, or to generic project feed,
2268         # or don't have specific feed yet (so they should use generic)
2269         return if ($action =~ /^(?:tags|heads|forks|tag|search)$/x);
2270
2271         my $branch;
2272         # branches refs uses 'refs/heads/' prefix (fullname) to differentiate
2273         # from tag links; this also makes possible to detect branch links
2274         if ((defined $hash_base && $hash_base =~ m!^refs/heads/(.*)$!) ||
2275             (defined $hash      && $hash      =~ m!^refs/heads/(.*)$!)) {
2276                 $branch = $1;
2277         }
2278         # find log type for feed description (title)
2279         my $type = 'log';
2280         if (defined $file_name) {
2281                 $type  = "history of $file_name";
2282                 $type .= "/" if ($action eq 'tree');
2283                 $type .= " on '$branch'" if (defined $branch);
2284         } else {
2285                 $type = "log of $branch" if (defined $branch);
2286         }
2287
2288         $res{-title} = $type;
2289         $res{'hash'} = (defined $branch ? "refs/heads/$branch" : undef);
2290         $res{'file_name'} = $file_name;
2291
2292         return %res;
2293 }
2294
2295 ## ----------------------------------------------------------------------
2296 ## git utility subroutines, invoking git commands
2297
2298 # returns path to the core git executable and the --git-dir parameter as list
2299 sub git_cmd {
2300         $number_of_git_cmds++;
2301         return $GIT, '--git-dir='.$git_dir;
2302 }
2303
2304 # quote the given arguments for passing them to the shell
2305 # quote_command("command", "arg 1", "arg with ' and ! characters")
2306 # => "'command' 'arg 1' 'arg with '\'' and '\!' characters'"
2307 # Try to avoid using this function wherever possible.
2308 sub quote_command {
2309         return join(' ',
2310                 map { my $a = $_; $a =~ s/(['!])/'\\$1'/g; "'$a'" } @_ );
2311 }
2312
2313 # get HEAD ref of given project as hash
2314 sub git_get_head_hash {
2315         return git_get_full_hash(shift, 'HEAD');
2316 }
2317
2318 sub git_get_full_hash {
2319         return git_get_hash(@_);
2320 }
2321
2322 sub git_get_short_hash {
2323         return git_get_hash(@_, '--short=7');
2324 }
2325
2326 sub git_get_hash {
2327         my ($project, $hash, @options) = @_;
2328         my $o_git_dir = $git_dir;
2329         my $retval = undef;
2330         $git_dir = "$projectroot/$project";
2331         if (open my $fd, '-|', git_cmd(), 'rev-parse',
2332             '--verify', '-q', @options, $hash) {
2333                 $retval = <$fd>;
2334                 chomp $retval if defined $retval;
2335                 close $fd;
2336         }
2337         if (defined $o_git_dir) {
2338                 $git_dir = $o_git_dir;
2339         }
2340         return $retval;
2341 }
2342
2343 # get type of given object
2344 sub git_get_type {
2345         my $hash = shift;
2346
2347         open my $fd, "-|", git_cmd(), "cat-file", '-t', $hash or return;
2348         my $type = <$fd>;
2349         close $fd or return;
2350         chomp $type;
2351         return $type;
2352 }
2353
2354 # repository configuration
2355 our $config_file = '';
2356 our %config;
2357
2358 # store multiple values for single key as anonymous array reference
2359 # single values stored directly in the hash, not as [ <value> ]
2360 sub hash_set_multi {
2361         my ($hash, $key, $value) = @_;
2362
2363         if (!exists $hash->{$key}) {
2364                 $hash->{$key} = $value;
2365         } elsif (!ref $hash->{$key}) {
2366                 $hash->{$key} = [ $hash->{$key}, $value ];
2367         } else {
2368                 push @{$hash->{$key}}, $value;
2369         }
2370 }
2371
2372 # return hash of git project configuration
2373 # optionally limited to some section, e.g. 'gitweb'
2374 sub git_parse_project_config {
2375         my $section_regexp = shift;
2376         my %config;
2377
2378         local $/ = "\0";
2379
2380         open my $fh, "-|", git_cmd(), "config", '-z', '-l',
2381                 or return;
2382
2383         while (my $keyval = <$fh>) {
2384                 chomp $keyval;
2385                 my ($key, $value) = split(/\n/, $keyval, 2);
2386
2387                 hash_set_multi(\%config, $key, $value)
2388                         if (!defined $section_regexp || $key =~ /^(?:$section_regexp)\./o);
2389         }
2390         close $fh;
2391
2392         return %config;
2393 }
2394
2395 # convert config value to boolean: 'true' or 'false'
2396 # no value, number > 0, 'true' and 'yes' values are true
2397 # rest of values are treated as false (never as error)
2398 sub config_to_bool {
2399         my $val = shift;
2400
2401         return 1 if !defined $val;             # section.key
2402
2403         # strip leading and trailing whitespace
2404         $val =~ s/^\s+//;
2405         $val =~ s/\s+$//;
2406
2407         return (($val =~ /^\d+$/ && $val) ||   # section.key = 1
2408                 ($val =~ /^(?:true|yes)$/i));  # section.key = true
2409 }
2410
2411 # convert config value to simple decimal number
2412 # an optional value suffix of 'k', 'm', or 'g' will cause the value
2413 # to be multiplied by 1024, 1048576, or 1073741824
2414 sub config_to_int {
2415         my $val = shift;
2416
2417         # strip leading and trailing whitespace
2418         $val =~ s/^\s+//;
2419         $val =~ s/\s+$//;
2420
2421         if (my ($num, $unit) = ($val =~ /^([0-9]*)([kmg])$/i)) {
2422                 $unit = lc($unit);
2423                 # unknown unit is treated as 1
2424                 return $num * ($unit eq 'g' ? 1073741824 :
2425                                $unit eq 'm' ?    1048576 :
2426                                $unit eq 'k' ?       1024 : 1);
2427         }
2428         return $val;
2429 }
2430
2431 # convert config value to array reference, if needed
2432 sub config_to_multi {
2433         my $val = shift;
2434
2435         return ref($val) ? $val : (defined($val) ? [ $val ] : []);
2436 }
2437
2438 sub git_get_project_config {
2439         my ($key, $type) = @_;
2440
2441         return unless defined $git_dir;
2442
2443         # key sanity check
2444         return unless ($key);
2445         $key =~ s/^gitweb\.//;
2446         return if ($key =~ m/\W/);
2447
2448         # type sanity check
2449         if (defined $type) {
2450                 $type =~ s/^--//;
2451                 $type = undef
2452                         unless ($type eq 'bool' || $type eq 'int');
2453         }
2454
2455         # get config
2456         if (!defined $config_file ||
2457             $config_file ne "$git_dir/config") {
2458                 %config = git_parse_project_config('gitweb');
2459                 $config_file = "$git_dir/config";
2460         }
2461
2462         # check if config variable (key) exists
2463         return unless exists $config{"gitweb.$key"};
2464
2465         # ensure given type
2466         if (!defined $type) {
2467                 return $config{"gitweb.$key"};
2468         } elsif ($type eq 'bool') {
2469                 # backward compatibility: 'git config --bool' returns true/false
2470                 return config_to_bool($config{"gitweb.$key"}) ? 'true' : 'false';
2471         } elsif ($type eq 'int') {
2472                 return config_to_int($config{"gitweb.$key"});
2473         }
2474         return $config{"gitweb.$key"};
2475 }
2476
2477 # get hash of given path at given ref
2478 sub git_get_hash_by_path {
2479         my $base = shift;
2480         my $path = shift || return undef;
2481         my $type = shift;
2482
2483         $path =~ s,/+$,,;
2484
2485         open my $fd, "-|", git_cmd(), "ls-tree", $base, "--", $path
2486                 or die_error(500, "Open git-ls-tree failed");
2487         my $line = <$fd>;
2488         close $fd or return undef;
2489
2490         if (!defined $line) {
2491                 # there is no tree or hash given by $path at $base
2492                 return undef;
2493         }
2494
2495         #'100644 blob 0fa3f3a66fb6a137f6ec2c19351ed4d807070ffa  panic.c'
2496         $line =~ m/^([0-9]+) (.+) ([0-9a-fA-F]{40})\t/;
2497         if (defined $type && $type ne $2) {
2498                 # type doesn't match
2499                 return undef;
2500         }
2501         return $3;
2502 }
2503
2504 # get path of entry with given hash at given tree-ish (ref)
2505 # used to get 'from' filename for combined diff (merge commit) for renames
2506 sub git_get_path_by_hash {
2507         my $base = shift || return;
2508         my $hash = shift || return;
2509
2510         local $/ = "\0";
2511
2512         open my $fd, "-|", git_cmd(), "ls-tree", '-r', '-t', '-z', $base
2513                 or return undef;
2514         while (my $line = <$fd>) {
2515                 chomp $line;
2516
2517                 #'040000 tree 595596a6a9117ddba9fe379b6b012b558bac8423  gitweb'
2518                 #'100644 blob e02e90f0429be0d2a69b76571101f20b8f75530f  gitweb/README'
2519                 if ($line =~ m/(?:[0-9]+) (?:.+) $hash\t(.+)$/) {
2520                         close $fd;
2521                         return $1;
2522                 }
2523         }
2524         close $fd;
2525         return undef;
2526 }
2527
2528 ## ......................................................................
2529 ## git utility functions, directly accessing git repository
2530
2531 sub git_get_project_description {
2532         my $path = shift;
2533
2534         $git_dir = "$projectroot/$path";
2535         open my $fd, '<', "$git_dir/description"
2536                 or return git_get_project_config('description');
2537         my $descr = <$fd>;
2538         close $fd;
2539         if (defined $descr) {
2540                 chomp $descr;
2541         }
2542         return $descr;
2543 }
2544
2545 sub git_get_project_ctags {
2546         my $path = shift;
2547         my $ctags = {};
2548
2549         $git_dir = "$projectroot/$path";
2550         opendir my $dh, "$git_dir/ctags"
2551                 or return $ctags;
2552         foreach (grep { -f $_ } map { "$git_dir/ctags/$_" } readdir($dh)) {
2553                 open my $ct, '<', $_ or next;
2554                 my $val = <$ct>;
2555                 chomp $val;
2556                 close $ct;
2557                 my $ctag = $_; $ctag =~ s#.*/##;
2558                 $ctags->{$ctag} = $val;
2559         }
2560         closedir $dh;
2561         $ctags;
2562 }
2563
2564 sub git_populate_project_tagcloud {
2565         my $ctags = shift;
2566
2567         # First, merge different-cased tags; tags vote on casing
2568         my %ctags_lc;
2569         foreach (keys %$ctags) {
2570                 $ctags_lc{lc $_}->{count} += $ctags->{$_};
2571                 if (not $ctags_lc{lc $_}->{topcount}
2572                     or $ctags_lc{lc $_}->{topcount} < $ctags->{$_}) {
2573                         $ctags_lc{lc $_}->{topcount} = $ctags->{$_};
2574                         $ctags_lc{lc $_}->{topname} = $_;
2575                 }
2576         }
2577
2578         my $cloud;
2579         if (eval { require HTML::TagCloud; 1; }) {
2580                 $cloud = HTML::TagCloud->new;
2581                 foreach (sort keys %ctags_lc) {
2582                         # Pad the title with spaces so that the cloud looks
2583                         # less crammed.
2584                         my $title = $ctags_lc{$_}->{topname};
2585                         $title =~ s/ /&nbsp;/g;
2586                         $title =~ s/^/&nbsp;/g;
2587                         $title =~ s/$/&nbsp;/g;
2588                         $cloud->add($title, $home_link."?by_tag=".$_, $ctags_lc{$_}->{count});
2589                 }
2590         } else {
2591                 $cloud = \%ctags_lc;
2592         }
2593         $cloud;
2594 }
2595
2596 sub git_show_project_tagcloud {
2597         my ($cloud, $count) = @_;
2598         print STDERR ref($cloud)."..\n";
2599         if (ref $cloud eq 'HTML::TagCloud') {
2600                 return $cloud->html_and_css($count);
2601         } else {
2602                 my @tags = sort { $cloud->{$a}->{count} <=> $cloud->{$b}->{count} } keys %$cloud;
2603                 return '<p align="center">' . join (', ', map {
2604                         "<a href=\"$home_link?by_tag=$_\">$cloud->{$_}->{topname}</a>"
2605                 } splice(@tags, 0, $count)) . '</p>';
2606         }
2607 }
2608
2609 sub git_get_project_url_list {
2610         my $path = shift;
2611
2612         $git_dir = "$projectroot/$path";
2613         open my $fd, '<', "$git_dir/cloneurl"
2614                 or return wantarray ?
2615                 @{ config_to_multi(git_get_project_config('url')) } :
2616                    config_to_multi(git_get_project_config('url'));
2617         my @git_project_url_list = map { chomp; $_ } <$fd>;
2618         close $fd;
2619
2620         return wantarray ? @git_project_url_list : \@git_project_url_list;
2621 }
2622
2623 sub git_get_projects_list {
2624         my ($filter) = @_;
2625         my @list;
2626
2627         $filter ||= '';
2628         $filter =~ s/\.git$//;
2629
2630         my $check_forks = gitweb_check_feature('forks');
2631
2632         if (-d $projects_list) {
2633                 # search in directory
2634                 my $dir = $projects_list . ($filter ? "/$filter" : '');
2635                 # remove the trailing "/"
2636                 $dir =~ s!/+$!!;
2637                 my $pfxlen = length("$dir");
2638                 my $pfxdepth = ($dir =~ tr!/!!);
2639
2640                 File::Find::find({
2641                         follow_fast => 1, # follow symbolic links
2642                         follow_skip => 2, # ignore duplicates
2643                         dangling_symlinks => 0, # ignore dangling symlinks, silently
2644                         wanted => sub {
2645                                 # global variables
2646                                 our $project_maxdepth;
2647                                 our $projectroot;
2648                                 # skip project-list toplevel, if we get it.
2649                                 return if (m!^[/.]$!);
2650                                 # only directories can be git repositories
2651                                 return unless (-d $_);
2652                                 # don't traverse too deep (Find is super slow on os x)
2653                                 if (($File::Find::name =~ tr!/!!) - $pfxdepth > $project_maxdepth) {
2654                                         $File::Find::prune = 1;
2655                                         return;
2656                                 }
2657
2658                                 my $subdir = substr($File::Find::name, $pfxlen + 1);
2659                                 # we check related file in $projectroot
2660                                 my $path = ($filter ? "$filter/" : '') . $subdir;
2661                                 if (check_export_ok("$projectroot/$path")) {
2662                                         push @list, { path => $path };
2663                                         $File::Find::prune = 1;
2664                                 }
2665                         },
2666                 }, "$dir");
2667
2668         } elsif (-f $projects_list) {
2669                 # read from file(url-encoded):
2670                 # 'git%2Fgit.git Linus+Torvalds'
2671                 # 'libs%2Fklibc%2Fklibc.git H.+Peter+Anvin'
2672                 # 'linux%2Fhotplug%2Fudev.git Greg+Kroah-Hartman'
2673                 my %paths;
2674                 open my $fd, '<', $projects_list or return;
2675         PROJECT:
2676                 while (my $line = <$fd>) {
2677                         chomp $line;
2678                         my ($path, $owner) = split ' ', $line;
2679                         $path = unescape($path);
2680                         $owner = unescape($owner);
2681                         if (!defined $path) {
2682                                 next;
2683                         }
2684                         if ($filter ne '') {
2685                                 # looking for forks;
2686                                 my $pfx = substr($path, 0, length($filter));
2687                                 if ($pfx ne $filter) {
2688                                         next PROJECT;
2689                                 }
2690                                 my $sfx = substr($path, length($filter));
2691                                 if ($sfx !~ /^\/.*\.git$/) {
2692                                         next PROJECT;
2693                                 }
2694                         } elsif ($check_forks) {
2695                         PATH:
2696                                 foreach my $filter (keys %paths) {
2697                                         # looking for forks;
2698                                         my $pfx = substr($path, 0, length($filter));
2699                                         if ($pfx ne $filter) {
2700                                                 next PATH;
2701                                         }
2702                                         my $sfx = substr($path, length($filter));
2703                                         if ($sfx !~ /^\/.*\.git$/) {
2704                                                 next PATH;
2705                                         }
2706                                         # is a fork, don't include it in
2707                                         # the list
2708                                         next PROJECT;
2709                                 }
2710                         }
2711                         if (check_export_ok("$projectroot/$path")) {
2712                                 my $pr = {
2713                                         path => $path,
2714                                         owner => to_utf8($owner),
2715                                 };
2716                                 push @list, $pr;
2717                                 (my $forks_path = $path) =~ s/\.git$//;
2718                                 $paths{$forks_path}++;
2719                         }
2720                 }
2721                 close $fd;
2722         }
2723         return @list;
2724 }
2725
2726 our $gitweb_project_owner = undef;
2727 sub git_get_project_list_from_file {
2728
2729         return if (defined $gitweb_project_owner);
2730
2731         $gitweb_project_owner = {};
2732         # read from file (url-encoded):
2733         # 'git%2Fgit.git Linus+Torvalds'
2734         # 'libs%2Fklibc%2Fklibc.git H.+Peter+Anvin'
2735         # 'linux%2Fhotplug%2Fudev.git Greg+Kroah-Hartman'
2736         if (-f $projects_list) {
2737                 open(my $fd, '<', $projects_list);
2738                 while (my $line = <$fd>) {
2739                         chomp $line;
2740                         my ($pr, $ow) = split ' ', $line;
2741                         $pr = unescape($pr);
2742                         $ow = unescape($ow);
2743                         $gitweb_project_owner->{$pr} = to_utf8($ow);
2744                 }
2745                 close $fd;
2746         }
2747 }
2748
2749 sub git_get_project_owner {
2750         my $project = shift;
2751         my $owner;
2752
2753         return undef unless $project;
2754         $git_dir = "$projectroot/$project";
2755
2756         if (!defined $gitweb_project_owner) {
2757                 git_get_project_list_from_file();
2758         }
2759
2760         if (exists $gitweb_project_owner->{$project}) {
2761                 $owner = $gitweb_project_owner->{$project};
2762         }
2763         if (!defined $owner){
2764                 $owner = git_get_project_config('owner');
2765         }
2766         if (!defined $owner) {
2767                 $owner = get_file_owner("$git_dir");
2768         }
2769
2770         return $owner;
2771 }
2772
2773 sub git_get_last_activity {
2774         my ($path) = @_;
2775         my $fd;
2776
2777         $git_dir = "$projectroot/$path";
2778         open($fd, "-|", git_cmd(), 'for-each-ref',
2779              '--format=%(committer)',
2780              '--sort=-committerdate',
2781              '--count=1',
2782              'refs/heads') or return;
2783         my $most_recent = <$fd>;
2784         close $fd or return;
2785         if (defined $most_recent &&
2786             $most_recent =~ / (\d+) [-+][01]\d\d\d$/) {
2787                 my $timestamp = $1;
2788                 my $age = time - $timestamp;
2789                 return ($age, age_string($age));
2790         }
2791         return (undef, undef);
2792 }
2793
2794 # Implementation note: when a single remote is wanted, we cannot use 'git
2795 # remote show -n' because that command always work (assuming it's a remote URL
2796 # if it's not defined), and we cannot use 'git remote show' because that would
2797 # try to make a network roundtrip. So the only way to find if that particular
2798 # remote is defined is to walk the list provided by 'git remote -v' and stop if
2799 # and when we find what we want.
2800 sub git_get_remotes_list {
2801         my $wanted = shift;
2802         my %remotes = ();
2803
2804         open my $fd, '-|' , git_cmd(), 'remote', '-v';
2805         return unless $fd;
2806         while (my $remote = <$fd>) {
2807                 chomp $remote;
2808                 $remote =~ s!\t(.*?)\s+\((\w+)\)$!!;
2809                 next if $wanted and not $remote eq $wanted;
2810                 my ($url, $key) = ($1, $2);
2811
2812                 $remotes{$remote} ||= { 'heads' => () };
2813                 $remotes{$remote}{$key} = $url;
2814         }
2815         close $fd or return;
2816         return wantarray ? %remotes : \%remotes;
2817 }
2818
2819 # Takes a hash of remotes as first parameter and fills it by adding the
2820 # available remote heads for each of the indicated remotes.
2821 sub fill_remote_heads {
2822         my $remotes = shift;
2823         my @heads = map { "remotes/$_" } keys %$remotes;
2824         my @remoteheads = git_get_heads_list(undef, @heads);
2825         foreach my $remote (keys %$remotes) {
2826                 $remotes->{$remote}{'heads'} = [ grep {
2827                         $_->{'name'} =~ s!^$remote/!!
2828                         } @remoteheads ];
2829         }
2830 }
2831
2832 sub git_get_references {
2833         my $type = shift || "";
2834         my %refs;
2835         # 5dc01c595e6c6ec9ccda4f6f69c131c0dd945f8c refs/tags/v2.6.11
2836         # c39ae07f393806ccf406ef966e9a15afc43cc36a refs/tags/v2.6.11^{}
2837         open my $fd, "-|", git_cmd(), "show-ref", "--dereference",
2838                 ($type ? ("--", "refs/$type") : ()) # use -- <pattern> if $type
2839                 or return;
2840
2841         while (my $line = <$fd>) {
2842                 chomp $line;
2843                 if ($line =~ m!^([0-9a-fA-F]{40})\srefs/($type.*)$!) {
2844                         if (defined $refs{$1}) {
2845                                 push @{$refs{$1}}, $2;
2846                         } else {
2847                                 $refs{$1} = [ $2 ];
2848                         }
2849                 }
2850         }
2851         close $fd or return;
2852         return \%refs;
2853 }
2854
2855 sub git_get_rev_name_tags {
2856         my $hash = shift || return undef;
2857
2858         open my $fd, "-|", git_cmd(), "name-rev", "--tags", $hash
2859                 or return;
2860         my $name_rev = <$fd>;
2861         close $fd;
2862
2863         if ($name_rev =~ m|^$hash tags/(.*)$|) {
2864                 return $1;
2865         } else {
2866                 # catches also '$hash undefined' output
2867                 return undef;
2868         }
2869 }
2870
2871 ## ----------------------------------------------------------------------
2872 ## parse to hash functions
2873
2874 sub parse_date {
2875         my $epoch = shift;
2876         my $tz = shift || "-0000";
2877
2878         my %date;
2879         my @months = ("Jan", "Feb", "Mar", "Apr", "May", "Jun", "Jul", "Aug", "Sep", "Oct", "Nov", "Dec");
2880         my @days = ("Sun", "Mon", "Tue", "Wed", "Thu", "Fri", "Sat");
2881         my ($sec, $min, $hour, $mday, $mon, $year, $wday, $yday) = gmtime($epoch);
2882         $date{'hour'} = $hour;
2883         $date{'minute'} = $min;
2884         $date{'mday'} = $mday;
2885         $date{'day'} = $days[$wday];
2886         $date{'month'} = $months[$mon];
2887         $date{'rfc2822'}   = sprintf "%s, %d %s %4d %02d:%02d:%02d +0000",
2888                              $days[$wday], $mday, $months[$mon], 1900+$year, $hour ,$min, $sec;
2889         $date{'mday-time'} = sprintf "%d %s %02d:%02d",
2890                              $mday, $months[$mon], $hour ,$min;
2891         $date{'iso-8601'}  = sprintf "%04d-%02d-%02dT%02d:%02d:%02dZ",
2892                              1900+$year, 1+$mon, $mday, $hour ,$min, $sec;
2893
2894         $tz =~ m/^([+\-][0-9][0-9])([0-9][0-9])$/;
2895         my $local = $epoch + ((int $1 + ($2/60)) * 3600);
2896         ($sec, $min, $hour, $mday, $mon, $year, $wday, $yday) = gmtime($local);
2897         $date{'hour_local'} = $hour;
2898         $date{'minute_local'} = $min;
2899         $date{'tz_local'} = $tz;
2900         $date{'iso-tz'} = sprintf("%04d-%02d-%02d %02d:%02d:%02d %s",
2901                                   1900+$year, $mon+1, $mday,
2902                                   $hour, $min, $sec, $tz);
2903         return %date;
2904 }
2905
2906 sub parse_tag {
2907         my $tag_id = shift;
2908         my %tag;
2909         my @comment;
2910
2911         open my $fd, "-|", git_cmd(), "cat-file", "tag", $tag_id or return;
2912         $tag{'id'} = $tag_id;
2913         while (my $line = <$fd>) {
2914                 chomp $line;
2915                 if ($line =~ m/^object ([0-9a-fA-F]{40})$/) {
2916                         $tag{'object'} = $1;
2917                 } elsif ($line =~ m/^type (.+)$/) {
2918                         $tag{'type'} = $1;
2919                 } elsif ($line =~ m/^tag (.+)$/) {
2920                         $tag{'name'} = $1;
2921                 } elsif ($line =~ m/^tagger (.*) ([0-9]+) (.*)$/) {
2922                         $tag{'author'} = $1;
2923                         $tag{'author_epoch'} = $2;
2924                         $tag{'author_tz'} = $3;
2925                         if ($tag{'author'} =~ m/^([^<]+) <([^>]*)>/) {
2926                                 $tag{'author_name'}  = $1;
2927                                 $tag{'author_email'} = $2;
2928                         } else {
2929                                 $tag{'author_name'} = $tag{'author'};
2930                         }
2931                 } elsif ($line =~ m/--BEGIN/) {
2932                         push @comment, $line;
2933                         last;
2934                 } elsif ($line eq "") {
2935                         last;
2936                 }
2937         }
2938         push @comment, <$fd>;
2939         $tag{'comment'} = \@comment;
2940         close $fd or return;
2941         if (!defined $tag{'name'}) {
2942                 return
2943         };
2944         return %tag
2945 }
2946
2947 sub parse_commit_text {
2948         my ($commit_text, $withparents) = @_;
2949         my @commit_lines = split '\n', $commit_text;
2950         my %co;
2951
2952         pop @commit_lines; # Remove '\0'
2953
2954         if (! @commit_lines) {
2955                 return;
2956         }
2957
2958         my $header = shift @commit_lines;
2959         if ($header !~ m/^[0-9a-fA-F]{40}/) {
2960                 return;
2961         }
2962         ($co{'id'}, my @parents) = split ' ', $header;
2963         while (my $line = shift @commit_lines) {
2964                 last if $line eq "\n";
2965                 if ($line =~ m/^tree ([0-9a-fA-F]{40})$/) {
2966                         $co{'tree'} = $1;
2967                 } elsif ((!defined $withparents) && ($line =~ m/^parent ([0-9a-fA-F]{40})$/)) {
2968                         push @parents, $1;
2969                 } elsif ($line =~ m/^author (.*) ([0-9]+) (.*)$/) {
2970                         $co{'author'} = to_utf8($1);
2971                         $co{'author_epoch'} = $2;
2972                         $co{'author_tz'} = $3;
2973                         if ($co{'author'} =~ m/^([^<]+) <([^>]*)>/) {
2974                                 $co{'author_name'}  = $1;
2975                                 $co{'author_email'} = $2;
2976                         } else {
2977                                 $co{'author_name'} = $co{'author'};
2978                         }
2979                 } elsif ($line =~ m/^committer (.*) ([0-9]+) (.*)$/) {
2980                         $co{'committer'} = to_utf8($1);
2981                         $co{'committer_epoch'} = $2;
2982                         $co{'committer_tz'} = $3;
2983                         if ($co{'committer'} =~ m/^([^<]+) <([^>]*)>/) {
2984                                 $co{'committer_name'}  = $1;
2985                                 $co{'committer_email'} = $2;
2986                         } else {
2987                                 $co{'committer_name'} = $co{'committer'};
2988                         }
2989                 }
2990         }
2991         if (!defined $co{'tree'}) {
2992                 return;
2993         };
2994         $co{'parents'} = \@parents;
2995         $co{'parent'} = $parents[0];
2996
2997         foreach my $title (@commit_lines) {
2998                 $title =~ s/^    //;
2999                 if ($title ne "") {
3000                         $co{'title'} = chop_str($title, 80, 5);
3001                         # remove leading stuff of merges to make the interesting part visible
3002                         if (length($title) > 50) {
3003                                 $title =~ s/^Automatic //;
3004                                 $title =~ s/^merge (of|with) /Merge ... /i;
3005                                 if (length($title) > 50) {
3006                                         $title =~ s/(http|rsync):\/\///;
3007                                 }
3008                                 if (length($title) > 50) {
3009                                         $title =~ s/(master|www|rsync)\.//;
3010                                 }
3011                                 if (length($title) > 50) {
3012                                         $title =~ s/kernel.org:?//;
3013                                 }
3014                                 if (length($title) > 50) {
3015                                         $title =~ s/\/pub\/scm//;
3016                                 }
3017                         }
3018                         $co{'title_short'} = chop_str($title, 50, 5);
3019                         last;
3020                 }
3021         }
3022         if (! defined $co{'title'} || $co{'title'} eq "") {
3023                 $co{'title'} = $co{'title_short'} = '(no commit message)';
3024         }
3025         # remove added spaces
3026         foreach my $line (@commit_lines) {
3027                 $line =~ s/^    //;
3028         }
3029         $co{'comment'} = \@commit_lines;
3030
3031         my $age = time - $co{'committer_epoch'};
3032         $co{'age'} = $age;
3033         $co{'age_string'} = age_string($age);
3034         my ($sec, $min, $hour, $mday, $mon, $year, $wday, $yday) = gmtime($co{'committer_epoch'});
3035         if ($age > 60*60*24*7*2) {
3036                 $co{'age_string_date'} = sprintf "%4i-%02u-%02i", 1900 + $year, $mon+1, $mday;
3037                 $co{'age_string_age'} = $co{'age_string'};
3038         } else {
3039                 $co{'age_string_date'} = $co{'age_string'};
3040                 $co{'age_string_age'} = sprintf "%4i-%02u-%02i", 1900 + $year, $mon+1, $mday;
3041         }
3042         return %co;
3043 }
3044
3045 sub parse_commit {
3046         my ($commit_id) = @_;
3047         my %co;
3048
3049         local $/ = "\0";
3050
3051         open my $fd, "-|", git_cmd(), "rev-list",
3052                 "--parents",
3053                 "--header",
3054                 "--max-count=1",
3055                 $commit_id,
3056                 "--",
3057                 or die_error(500, "Open git-rev-list failed");
3058         %co = parse_commit_text(<$fd>, 1);
3059         close $fd;
3060
3061         return %co;
3062 }
3063
3064 sub parse_commits {
3065         my ($commit_id, $maxcount, $skip, $filename, @args) = @_;
3066         my @cos;
3067
3068         $maxcount ||= 1;
3069         $skip ||= 0;
3070
3071         local $/ = "\0";
3072
3073         open my $fd, "-|", git_cmd(), "rev-list",
3074                 "--header",
3075                 @args,
3076                 ("--max-count=" . $maxcount),
3077                 ("--skip=" . $skip),
3078                 @extra_options,
3079                 $commit_id,
3080                 "--",
3081                 ($filename ? ($filename) : ())
3082                 or die_error(500, "Open git-rev-list failed");
3083         while (my $line = <$fd>) {
3084                 my %co = parse_commit_text($line);
3085                 push @cos, \%co;
3086         }
3087         close $fd;
3088
3089         return wantarray ? @cos : \@cos;
3090 }
3091
3092 # parse line of git-diff-tree "raw" output
3093 sub parse_difftree_raw_line {
3094         my $line = shift;
3095         my %res;
3096
3097         # ':100644 100644 03b218260e99b78c6df0ed378e59ed9205ccc96d 3b93d5e7cc7f7dd4ebed13a5cc1a4ad976fc94d8 M   ls-files.c'
3098         # ':100644 100644 7f9281985086971d3877aca27704f2aaf9c448ce bc190ebc71bbd923f2b728e505408f5e54bd073a M   rev-tree.c'
3099         if ($line =~ m/^:([0-7]{6}) ([0-7]{6}) ([0-9a-fA-F]{40}) ([0-9a-fA-F]{40}) (.)([0-9]{0,3})\t(.*)$/) {
3100                 $res{'from_mode'} = $1;
3101                 $res{'to_mode'} = $2;
3102                 $res{'from_id'} = $3;
3103                 $res{'to_id'} = $4;
3104                 $res{'status'} = $5;
3105                 $res{'similarity'} = $6;
3106                 if ($res{'status'} eq 'R' || $res{'status'} eq 'C') { # renamed or copied
3107                         ($res{'from_file'}, $res{'to_file'}) = map { unquote($_) } split("\t", $7);
3108                 } else {
3109                         $res{'from_file'} = $res{'to_file'} = $res{'file'} = unquote($7);
3110                 }
3111         }
3112         # '::100755 100755 100755 60e79ca1b01bc8b057abe17ddab484699a7f5fdb 94067cc5f73388f33722d52ae02f44692bc07490 94067cc5f73388f33722d52ae02f44692bc07490 MR git-gui/git-gui.sh'
3113         # combined diff (for merge commit)
3114         elsif ($line =~ s/^(::+)((?:[0-7]{6} )+)((?:[0-9a-fA-F]{40} )+)([a-zA-Z]+)\t(.*)$//) {
3115                 $res{'nparents'}  = length($1);
3116                 $res{'from_mode'} = [ split(' ', $2) ];
3117                 $res{'to_mode'} = pop @{$res{'from_mode'}};
3118                 $res{'from_id'} = [ split(' ', $3) ];
3119                 $res{'to_id'} = pop @{$res{'from_id'}};
3120                 $res{'status'} = [ split('', $4) ];
3121                 $res{'to_file'} = unquote($5);
3122         }
3123         # 'c512b523472485aef4fff9e57b229d9d243c967f'
3124         elsif ($line =~ m/^([0-9a-fA-F]{40})$/) {
3125                 $res{'commit'} = $1;
3126         }
3127
3128         return wantarray ? %res : \%res;
3129 }
3130
3131 # wrapper: return parsed line of git-diff-tree "raw" output
3132 # (the argument might be raw line, or parsed info)
3133 sub parsed_difftree_line {
3134         my $line_or_ref = shift;
3135
3136         if (ref($line_or_ref) eq "HASH") {
3137                 # pre-parsed (or generated by hand)
3138                 return $line_or_ref;
3139         } else {
3140                 return parse_difftree_raw_line($line_or_ref);
3141         }
3142 }
3143
3144 # parse line of git-ls-tree output
3145 sub parse_ls_tree_line {
3146         my $line = shift;
3147         my %opts = @_;
3148         my %res;
3149
3150         if ($opts{'-l'}) {
3151                 #'100644 blob 0fa3f3a66fb6a137f6ec2c19351ed4d807070ffa   16717  panic.c'
3152                 $line =~ m/^([0-9]+) (.+) ([0-9a-fA-F]{40}) +(-|[0-9]+)\t(.+)$/s;
3153
3154                 $res{'mode'} = $1;
3155                 $res{'type'} = $2;
3156                 $res{'hash'} = $3;
3157                 $res{'size'} = $4;
3158                 if ($opts{'-z'}) {
3159                         $res{'name'} = $5;
3160                 } else {
3161                         $res{'name'} = unquote($5);
3162                 }
3163         } else {
3164                 #'100644 blob 0fa3f3a66fb6a137f6ec2c19351ed4d807070ffa  panic.c'
3165                 $line =~ m/^([0-9]+) (.+) ([0-9a-fA-F]{40})\t(.+)$/s;
3166
3167                 $res{'mode'} = $1;
3168                 $res{'type'} = $2;
3169                 $res{'hash'} = $3;
3170                 if ($opts{'-z'}) {
3171                         $res{'name'} = $4;
3172                 } else {
3173                         $res{'name'} = unquote($4);
3174                 }
3175         }
3176
3177         return wantarray ? %res : \%res;
3178 }
3179
3180 # generates _two_ hashes, references to which are passed as 2 and 3 argument
3181 sub parse_from_to_diffinfo {
3182         my ($diffinfo, $from, $to, @parents) = @_;
3183
3184         if ($diffinfo->{'nparents'}) {
3185                 # combined diff
3186                 $from->{'file'} = [];
3187                 $from->{'href'} = [];
3188                 fill_from_file_info($diffinfo, @parents)
3189                         unless exists $diffinfo->{'from_file'};
3190                 for (my $i = 0; $i < $diffinfo->{'nparents'}; $i++) {
3191                         $from->{'file'}[$i] =
3192                                 defined $diffinfo->{'from_file'}[$i] ?
3193                                         $diffinfo->{'from_file'}[$i] :
3194                                         $diffinfo->{'to_file'};
3195                         if ($diffinfo->{'status'}[$i] ne "A") { # not new (added) file
3196                                 $from->{'href'}[$i] = href(action=>"blob",
3197                                                            hash_base=>$parents[$i],
3198                                                            hash=>$diffinfo->{'from_id'}[$i],
3199                                                            file_name=>$from->{'file'}[$i]);
3200                         } else {
3201                                 $from->{'href'}[$i] = undef;
3202                         }
3203                 }
3204         } else {
3205                 # ordinary (not combined) diff
3206                 $from->{'file'} = $diffinfo->{'from_file'};
3207                 if ($diffinfo->{'status'} ne "A") { # not new (added) file
3208                         $from->{'href'} = href(action=>"blob", hash_base=>$hash_parent,
3209                                                hash=>$diffinfo->{'from_id'},
3210                                                file_name=>$from->{'file'});
3211                 } else {
3212                         delete $from->{'href'};
3213                 }
3214         }
3215
3216         $to->{'file'} = $diffinfo->{'to_file'};
3217         if (!is_deleted($diffinfo)) { # file exists in result
3218                 $to->{'href'} = href(action=>"blob", hash_base=>$hash,
3219                                      hash=>$diffinfo->{'to_id'},
3220                                      file_name=>$to->{'file'});
3221         } else {
3222                 delete $to->{'href'};
3223         }
3224 }
3225
3226 ## ......................................................................
3227 ## parse to array of hashes functions
3228
3229 sub git_get_heads_list {
3230         my ($limit, @classes) = @_;
3231         @classes = ('heads') unless @classes;
3232         my @patterns = map { "refs/$_" } @classes;
3233         my @headslist;
3234
3235         open my $fd, '-|', git_cmd(), 'for-each-ref',
3236                 ($limit ? '--count='.($limit+1) : ()), '--sort=-committerdate',
3237                 '--format=%(objectname) %(refname) %(subject)%00%(committer)',
3238                 @patterns
3239                 or return;
3240         while (my $line = <$fd>) {
3241                 my %ref_item;
3242
3243                 chomp $line;
3244                 my ($refinfo, $committerinfo) = split(/\0/, $line);
3245                 my ($hash, $name, $title) = split(' ', $refinfo, 3);
3246                 my ($committer, $epoch, $tz) =
3247                         ($committerinfo =~ /^(.*) ([0-9]+) (.*)$/);
3248                 $ref_item{'fullname'}  = $name;
3249                 $name =~ s!^refs/(?:head|remote)s/!!;
3250
3251                 $ref_item{'name'}  = $name;
3252                 $ref_item{'id'}    = $hash;
3253                 $ref_item{'title'} = $title || '(no commit message)';
3254                 $ref_item{'epoch'} = $epoch;
3255                 if ($epoch) {
3256                         $ref_item{'age'} = age_string(time - $ref_item{'epoch'});
3257                 } else {
3258                         $ref_item{'age'} = "unknown";
3259                 }
3260
3261                 push @headslist, \%ref_item;
3262         }
3263         close $fd;
3264
3265         return wantarray ? @headslist : \@headslist;
3266 }
3267
3268 sub git_get_tags_list {
3269         my $limit = shift;
3270         my @tagslist;
3271
3272         open my $fd, '-|', git_cmd(), 'for-each-ref',
3273                 ($limit ? '--count='.($limit+1) : ()), '--sort=-creatordate',
3274                 '--format=%(objectname) %(objecttype) %(refname) '.
3275                 '%(*objectname) %(*objecttype) %(subject)%00%(creator)',
3276                 'refs/tags'
3277                 or return;
3278         while (my $line = <$fd>) {
3279                 my %ref_item;
3280
3281                 chomp $line;
3282                 my ($refinfo, $creatorinfo) = split(/\0/, $line);
3283                 my ($id, $type, $name, $refid, $reftype, $title) = split(' ', $refinfo, 6);
3284                 my ($creator, $epoch, $tz) =
3285                         ($creatorinfo =~ /^(.*) ([0-9]+) (.*)$/);
3286                 $ref_item{'fullname'} = $name;
3287                 $name =~ s!^refs/tags/!!;
3288
3289                 $ref_item{'type'} = $type;
3290                 $ref_item{'id'} = $id;
3291                 $ref_item{'name'} = $name;
3292                 if ($type eq "tag") {
3293                         $ref_item{'subject'} = $title;
3294                         $ref_item{'reftype'} = $reftype;
3295                         $ref_item{'refid'}   = $refid;
3296                 } else {
3297                         $ref_item{'reftype'} = $type;
3298                         $ref_item{'refid'}   = $id;
3299                 }
3300
3301                 if ($type eq "tag" || $type eq "commit") {
3302                         $ref_item{'epoch'} = $epoch;
3303                         if ($epoch) {
3304                                 $ref_item{'age'} = age_string(time - $ref_item{'epoch'});
3305                         } else {
3306                                 $ref_item{'age'} = "unknown";
3307                         }
3308                 }
3309
3310                 push @tagslist, \%ref_item;
3311         }
3312         close $fd;
3313
3314         return wantarray ? @tagslist : \@tagslist;
3315 }
3316
3317 ## ----------------------------------------------------------------------
3318 ## filesystem-related functions
3319
3320 sub get_file_owner {
3321         my $path = shift;
3322
3323         my ($dev, $ino, $mode, $nlink, $st_uid, $st_gid, $rdev, $size) = stat($path);
3324         my ($name, $passwd, $uid, $gid, $quota, $comment, $gcos, $dir, $shell) = getpwuid($st_uid);
3325         if (!defined $gcos) {
3326                 return undef;
3327         }
3328         my $owner = $gcos;
3329         $owner =~ s/[,;].*$//;
3330         return to_utf8($owner);
3331 }
3332
3333 # assume that file exists
3334 sub insert_file {
3335         my $filename = shift;
3336
3337         open my $fd, '<', $filename;
3338         print map { to_utf8($_) } <$fd>;
3339         close $fd;
3340 }
3341
3342 ## ......................................................................
3343 ## mimetype related functions
3344
3345 sub mimetype_guess_file {
3346         my $filename = shift;
3347         my $mimemap = shift;
3348         -r $mimemap or return undef;
3349
3350         my %mimemap;
3351         open(my $mh, '<', $mimemap) or return undef;
3352         while (<$mh>) {
3353                 next if m/^#/; # skip comments
3354                 my ($mimetype, $exts) = split(/\t+/);
3355                 if (defined $exts) {
3356                         my @exts = split(/\s+/, $exts);
3357                         foreach my $ext (@exts) {
3358                                 $mimemap{$ext} = $mimetype;
3359                         }
3360                 }
3361         }
3362         close($mh);
3363
3364         $filename =~ /\.([^.]*)$/;
3365         return $mimemap{$1};
3366 }
3367
3368 sub mimetype_guess {
3369         my $filename = shift;
3370         my $mime;
3371         $filename =~ /\./ or return undef;
3372
3373         if ($mimetypes_file) {
3374                 my $file = $mimetypes_file;
3375                 if ($file !~ m!^/!) { # if it is relative path
3376                         # it is relative to project
3377                         $file = "$projectroot/$project/$file";
3378                 }
3379                 $mime = mimetype_guess_file($filename, $file);
3380         }
3381         $mime ||= mimetype_guess_file($filename, '/etc/mime.types');
3382         return $mime;
3383 }
3384
3385 sub blob_mimetype {
3386         my $fd = shift;
3387         my $filename = shift;
3388
3389         if ($filename) {
3390                 my $mime = mimetype_guess($filename);
3391                 $mime and return $mime;
3392         }
3393
3394         # just in case
3395         return $default_blob_plain_mimetype unless $fd;
3396
3397         if (-T $fd) {
3398                 return 'text/plain';
3399         } elsif (! $filename) {
3400                 return 'application/octet-stream';
3401         } elsif ($filename =~ m/\.png$/i) {
3402                 return 'image/png';
3403         } elsif ($filename =~ m/\.gif$/i) {
3404                 return 'image/gif';
3405         } elsif ($filename =~ m/\.jpe?g$/i) {
3406                 return 'image/jpeg';
3407         } else {
3408                 return 'application/octet-stream';
3409         }
3410 }
3411
3412 sub blob_contenttype {
3413         my ($fd, $file_name, $type) = @_;
3414
3415         $type ||= blob_mimetype($fd, $file_name);
3416         if ($type eq 'text/plain' && defined $default_text_plain_charset) {
3417                 $type .= "; charset=$default_text_plain_charset";
3418         }
3419
3420         return $type;
3421 }
3422
3423 # guess file syntax for syntax highlighting; return undef if no highlighting
3424 # the name of syntax can (in the future) depend on syntax highlighter used
3425 sub guess_file_syntax {
3426         my ($highlight, $mimetype, $file_name) = @_;
3427         return undef unless ($highlight && defined $file_name);
3428         my $basename = basename($file_name, '.in');
3429         return $highlight_basename{$basename}
3430                 if exists $highlight_basename{$basename};
3431
3432         $basename =~ /\.([^.]*)$/;
3433         my $ext = $1 or return undef;
3434         return $highlight_ext{$ext}
3435                 if exists $highlight_ext{$ext};
3436
3437         return undef;
3438 }
3439
3440 # run highlighter and return FD of its output,
3441 # or return original FD if no highlighting
3442 sub run_highlighter {
3443         my ($fd, $highlight, $syntax) = @_;
3444         return $fd unless ($highlight && defined $syntax);
3445
3446         close $fd
3447                 or die_error(404, "Reading blob failed");
3448         open $fd, quote_command(git_cmd(), "cat-file", "blob", $hash)." | ".
3449                   quote_command($highlight_bin).
3450                   " --xhtml --fragment --syntax $syntax |"
3451                 or die_error(500, "Couldn't open file or run syntax highlighter");
3452         return $fd;
3453 }
3454
3455 ## ======================================================================
3456 ## functions printing HTML: header, footer, error page
3457
3458 sub get_page_title {
3459         my $title = to_utf8($site_name);
3460
3461         return $title unless (defined $project);
3462         $title .= " - " . to_utf8($project);
3463
3464         return $title unless (defined $action);
3465         $title .= "/$action"; # $action is US-ASCII (7bit ASCII)
3466
3467         return $title unless (defined $file_name);
3468         $title .= " - " . esc_path($file_name);
3469         if ($action eq "tree" && $file_name !~ m|/$|) {
3470                 $title .= "/";
3471         }
3472
3473         return $title;
3474 }
3475
3476 sub git_header_html {
3477         my $status = shift || "200 OK";
3478         my $expires = shift;
3479         my %opts = @_;
3480
3481         my $title = get_page_title();
3482         my $content_type;
3483         # require explicit support from the UA if we are to send the page as
3484         # 'application/xhtml+xml', otherwise send it as plain old 'text/html'.
3485         # we have to do this because MSIE sometimes globs '*/*', pretending to
3486         # support xhtml+xml but choking when it gets what it asked for.
3487         if (defined $cgi->http('HTTP_ACCEPT') &&
3488             $cgi->http('HTTP_ACCEPT') =~ m/(,|;|\s|^)application\/xhtml\+xml(,|;|\s|$)/ &&
3489             $cgi->Accept('application/xhtml+xml') != 0) {
3490                 $content_type = 'application/xhtml+xml';
3491         } else {
3492                 $content_type = 'text/html';
3493         }
3494         print $cgi->header(-type=>$content_type, -charset => 'utf-8',
3495                            -status=> $status, -expires => $expires)
3496                 unless ($opts{'-no_http_header'});
3497         my $mod_perl_version = $ENV{'MOD_PERL'} ? " $ENV{'MOD_PERL'}" : '';
3498         print <<EOF;
3499 <?xml version="1.0" encoding="utf-8"?>
3500 <!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Strict//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-strict.dtd">
3501 <html xmlns="http://www.w3.org/1999/xhtml" xml:lang="en-US" lang="en-US">
3502 <!-- git web interface version $version, (C) 2005-2006, Kay Sievers <kay.sievers\@vrfy.org>, Christian Gierke -->
3503 <!-- git core binaries version $git_version -->
3504 <head>
3505 <meta http-equiv="content-type" content="$content_type; charset=utf-8"/>
3506 <meta name="generator" content="gitweb/$version git/$git_version$mod_perl_version"/>
3507 <meta name="robots" content="index, nofollow"/>
3508 <title>$title</title>
3509 EOF
3510         # the stylesheet, favicon etc urls won't work correctly with path_info
3511         # unless we set the appropriate base URL
3512         if ($ENV{'PATH_INFO'}) {
3513                 print "<base href=\"".esc_url($base_url)."\" />\n";
3514         }
3515         # print out each stylesheet that exist, providing backwards capability
3516         # for those people who defined $stylesheet in a config file
3517         if (defined $stylesheet) {
3518                 print '<link rel="stylesheet" type="text/css" href="'.$stylesheet.'"/>'."\n";
3519         } else {
3520                 foreach my $stylesheet (@stylesheets) {
3521                         next unless $stylesheet;
3522                         print '<link rel="stylesheet" type="text/css" href="'.$stylesheet.'"/>'."\n";
3523                 }
3524         }
3525         if (defined $project) {
3526                 my %href_params = get_feed_info();
3527                 if (!exists $href_params{'-title'}) {
3528                         $href_params{'-title'} = 'log';
3529                 }
3530
3531                 foreach my $format qw(RSS Atom) {
3532                         my $type = lc($format);
3533                         my %link_attr = (
3534                                 '-rel' => 'alternate',
3535                                 '-title' => "$project - $href_params{'-title'} - $format feed",
3536                                 '-type' => "application/$type+xml"
3537                         );
3538
3539                         $href_params{'action'} = $type;
3540                         $link_attr{'-href'} = href(%href_params);
3541                         print "<link ".
3542                               "rel=\"$link_attr{'-rel'}\" ".
3543                               "title=\"$link_attr{'-title'}\" ".
3544                               "href=\"$link_attr{'-href'}\" ".
3545                               "type=\"$link_attr{'-type'}\" ".
3546                               "/>\n";
3547
3548                         $href_params{'extra_options'} = '--no-merges';
3549                         $link_attr{'-href'} = href(%href_params);
3550                         $link_attr{'-title'} .= ' (no merges)';
3551                         print "<link ".
3552                               "rel=\"$link_attr{'-rel'}\" ".
3553                               "title=\"$link_attr{'-title'}\" ".
3554                               "href=\"$link_attr{'-href'}\" ".
3555                               "type=\"$link_attr{'-type'}\" ".
3556                               "/>\n";
3557                 }
3558
3559         } else {
3560                 printf('<link rel="alternate" title="%s projects list" '.
3561                        'href="%s" type="text/plain; charset=utf-8" />'."\n",
3562                        $site_name, href(project=>undef, action=>"project_index"));
3563                 printf('<link rel="alternate" title="%s projects feeds" '.
3564                        'href="%s" type="text/x-opml" />'."\n",
3565                        $site_name, href(project=>undef, action=>"opml"));
3566         }
3567         if (defined $favicon) {
3568                 print qq(<link rel="shortcut icon" href="$favicon" type="image/png" />\n);
3569         }
3570
3571         print "</head>\n" .
3572               "<body>\n";
3573
3574         if (defined $site_header && -f $site_header) {
3575                 insert_file($site_header);
3576         }
3577
3578         print "<div class=\"page_header\">\n" .
3579               $cgi->a({-href => esc_url($logo_url),
3580                        -title => $logo_label},
3581                       qq(<img src="$logo" width="72" height="27" alt="git" class="logo"/>));
3582         print $cgi->a({-href => esc_url($home_link)}, $home_link_str) . " / ";
3583         if (defined $project) {
3584                 print $cgi->a({-href => href(action=>"summary")}, esc_html($project));
3585                 if (defined $action) {
3586                         my $action_print = $action ;
3587                         if (defined $opts{-action_extra}) {
3588                                 $action_print = $cgi->a({-href => href(action=>$action)},
3589                                         $action);
3590                         }
3591                         print " / $action_print";
3592                 }
3593                 if (defined $opts{-action_extra}) {
3594                         print " / $opts{-action_extra}";
3595                 }
3596                 print "\n";
3597         }
3598         print "</div>\n";
3599
3600         my $have_search = gitweb_check_feature('search');
3601         if (defined $project && $have_search) {
3602                 if (!defined $searchtext) {
3603                         $searchtext = "";
3604                 }
3605                 my $search_hash;
3606                 if (defined $hash_base) {
3607                         $search_hash = $hash_base;
3608                 } elsif (defined $hash) {
3609                         $search_hash = $hash;
3610                 } else {
3611                         $search_hash = "HEAD";
3612                 }
3613                 my $action = $my_uri;
3614                 my $use_pathinfo = gitweb_check_feature('pathinfo');
3615                 if ($use_pathinfo) {
3616                         $action .= "/".esc_url($project);
3617                 }
3618                 print $cgi->startform(-method => "get", -action => $action) .
3619                       "<div class=\"search\">\n" .
3620                       (!$use_pathinfo &&
3621                       $cgi->input({-name=>"p", -value=>$project, -type=>"hidden"}) . "\n") .
3622                       $cgi->input({-name=>"a", -value=>"search", -type=>"hidden"}) . "\n" .
3623                       $cgi->input({-name=>"h", -value=>$search_hash, -type=>"hidden"}) . "\n" .
3624                       $cgi->popup_menu(-name => 'st', -default => 'commit',
3625                                        -values => ['commit', 'grep', 'author', 'committer', 'pickaxe']) .
3626                       $cgi->sup($cgi->a({-href => href(action=>"search_help")}, "?")) .
3627                       " search:\n",
3628                       $cgi->textfield(-name => "s", -value => $searchtext) . "\n" .
3629                       "<span title=\"Extended regular expression\">" .
3630                       $cgi->checkbox(-name => 'sr', -value => 1, -label => 're',
3631                                      -checked => $search_use_regexp) .
3632                       "</span>" .
3633                       "</div>" .
3634                       $cgi->end_form() . "\n";
3635         }
3636 }
3637
3638 sub git_footer_html {
3639         my $feed_class = 'rss_logo';
3640
3641         print "<div class=\"page_footer\">\n";
3642         if (defined $project) {
3643                 my $descr = git_get_project_description($project);
3644                 if (defined $descr) {
3645                         print "<div class=\"page_footer_text\">" . esc_html($descr) . "</div>\n";
3646                 }
3647
3648                 my %href_params = get_feed_info();
3649                 if (!%href_params) {
3650                         $feed_class .= ' generic';
3651                 }
3652                 $href_params{'-title'} ||= 'log';
3653
3654                 foreach my $format qw(RSS Atom) {
3655                         $href_params{'action'} = lc($format);
3656                         print $cgi->a({-href => href(%href_params),
3657                                       -title => "$href_params{'-title'} $format feed",
3658                                       -class => $feed_class}, $format)."\n";
3659                 }
3660
3661         } else {
3662                 print $cgi->a({-href => href(project=>undef, action=>"opml"),
3663                               -class => $feed_class}, "OPML") . " ";
3664                 print $cgi->a({-href => href(project=>undef, action=>"project_index"),
3665                               -class => $feed_class}, "TXT") . "\n";
3666         }
3667         print "</div>\n"; # class="page_footer"
3668
3669         if (defined $t0 && gitweb_check_feature('timed')) {
3670                 print "<div id=\"generating_info\">\n";
3671                 print 'This page took '.
3672                       '<span id="generating_time" class="time_span">'.
3673                       tv_interval($t0, [ gettimeofday() ]).
3674                       ' seconds </span>'.
3675                       ' and '.
3676                       '<span id="generating_cmd">'.
3677                       $number_of_git_cmds.
3678                       '</span> git commands '.
3679                       " to generate.\n";
3680                 print "</div>\n"; # class="page_footer"
3681         }
3682
3683         if (defined $site_footer && -f $site_footer) {
3684                 insert_file($site_footer);
3685         }
3686
3687         print qq!<script type="text/javascript" src="$javascript"></script>\n!;
3688         if (defined $action &&
3689             $action eq 'blame_incremental') {
3690                 print qq!<script type="text/javascript">\n!.
3691                       qq!startBlame("!. href(action=>"blame_data", -replay=>1) .qq!",\n!.
3692                       qq!           "!. href() .qq!");\n!.
3693                       qq!</script>\n!;
3694         } elsif (gitweb_check_feature('javascript-actions')) {
3695                 print qq!<script type="text/javascript">\n!.
3696                       qq!window.onload = fixLinks;\n!.
3697                       qq!</script>\n!;
3698         }
3699
3700         print "</body>\n" .
3701               "</html>";
3702 }
3703
3704 # die_error(<http_status_code>, <error_message>[, <detailed_html_description>])
3705 # Example: die_error(404, 'Hash not found')
3706 # By convention, use the following status codes (as defined in RFC 2616):
3707 # 400: Invalid or missing CGI parameters, or
3708 #      requested object exists but has wrong type.
3709 # 403: Requested feature (like "pickaxe" or "snapshot") not enabled on
3710 #      this server or project.
3711 # 404: Requested object/revision/project doesn't exist.
3712 # 500: The server isn't configured properly, or
3713 #      an internal error occurred (e.g. failed assertions caused by bugs), or
3714 #      an unknown error occurred (e.g. the git binary died unexpectedly).
3715 # 503: The server is currently unavailable (because it is overloaded,
3716 #      or down for maintenance).  Generally, this is a temporary state.
3717 sub die_error {
3718         my $status = shift || 500;
3719         my $error = esc_html(shift) || "Internal Server Error";
3720         my $extra = shift;
3721         my %opts = @_;
3722
3723         my %http_responses = (
3724                 400 => '400 Bad Request',
3725                 403 => '403 Forbidden',
3726                 404 => '404 Not Found',
3727                 500 => '500 Internal Server Error',
3728                 503 => '503 Service Unavailable',
3729         );
3730         git_header_html($http_responses{$status}, undef, %opts);
3731         print <<EOF;
3732 <div class="page_body">
3733 <br /><br />
3734 $status - $error
3735 <br />
3736 EOF
3737         if (defined $extra) {
3738                 print "<hr />\n" .
3739                       "$extra\n";
3740         }
3741         print "</div>\n";
3742
3743         git_footer_html();
3744         goto DONE_GITWEB
3745                 unless ($opts{'-error_handler'});
3746 }
3747
3748 ## ----------------------------------------------------------------------
3749 ## functions printing or outputting HTML: navigation
3750
3751 sub git_print_page_nav {
3752         my ($current, $suppress, $head, $treehead, $treebase, $extra) = @_;
3753         $extra = '' if !defined $extra; # pager or formats
3754
3755         my @navs = qw(summary shortlog log commit commitdiff tree);
3756         if ($suppress) {
3757                 @navs = grep { $_ ne $suppress } @navs;
3758         }
3759
3760         my %arg = map { $_ => {action=>$_} } @navs;
3761         if (defined $head) {
3762                 for (qw(commit commitdiff)) {
3763                         $arg{$_}{'hash'} = $head;
3764                 }
3765                 if ($current =~ m/^(tree | log | shortlog | commit | commitdiff | search)$/x) {
3766                         for (qw(shortlog log)) {
3767                                 $arg{$_}{'hash'} = $head;
3768                         }
3769                 }
3770         }
3771
3772         $arg{'tree'}{'hash'} = $treehead if defined $treehead;
3773         $arg{'tree'}{'hash_base'} = $treebase if defined $treebase;
3774
3775         my @actions = gitweb_get_feature('actions');
3776         my %repl = (
3777                 '%' => '%',
3778                 'n' => $project,         # project name
3779                 'f' => $git_dir,         # project path within filesystem
3780                 'h' => $treehead || '',  # current hash ('h' parameter)
3781                 'b' => $treebase || '',  # hash base ('hb' parameter)
3782         );
3783         while (@actions) {
3784                 my ($label, $link, $pos) = splice(@actions,0,3);
3785                 # insert
3786                 @navs = map { $_ eq $pos ? ($_, $label) : $_ } @navs;
3787                 # munch munch
3788                 $link =~ s/%([%nfhb])/$repl{$1}/g;
3789                 $arg{$label}{'_href'} = $link;
3790         }
3791
3792         print "<div class=\"page_nav\">\n" .
3793                 (join " | ",
3794                  map { $_ eq $current ?
3795                        $_ : $cgi->a({-href => ($arg{$_}{_href} ? $arg{$_}{_href} : href(%{$arg{$_}}))}, "$_")
3796                  } @navs);
3797         print "<br/>\n$extra<br/>\n" .
3798               "</div>\n";
3799 }
3800
3801 # returns a submenu for the nagivation of the refs views (tags, heads,
3802 # remotes) with the current view disabled and the remotes view only
3803 # available if the feature is enabled
3804 sub format_ref_views {
3805         my ($current) = @_;
3806         my @ref_views = qw{tags heads};
3807         push @ref_views, 'remotes' if gitweb_check_feature('remote_heads');
3808         return join " | ", map {
3809                 $_ eq $current ? $_ :
3810                 $cgi->a({-href => href(action=>$_)}, $_)
3811         } @ref_views
3812 }
3813
3814 sub format_paging_nav {
3815         my ($action, $page, $has_next_link) = @_;
3816         my $paging_nav;
3817
3818
3819         if ($page > 0) {
3820                 $paging_nav .=
3821                         $cgi->a({-href => href(-replay=>1, page=>undef)}, "first") .
3822                         " &sdot; " .
3823                         $cgi->a({-href => href(-replay=>1, page=>$page-1),
3824                                  -accesskey => "p", -title => "Alt-p"}, "prev");
3825         } else {
3826                 $paging_nav .= "first &sdot; prev";
3827         }
3828
3829         if ($has_next_link) {
3830                 $paging_nav .= " &sdot; " .
3831                         $cgi->a({-href => href(-replay=>1, page=>$page+1),
3832                                  -accesskey => "n", -title => "Alt-n"}, "next");
3833         } else {
3834                 $paging_nav .= " &sdot; next";
3835         }
3836
3837         return $paging_nav;
3838 }
3839
3840 ## ......................................................................
3841 ## functions printing or outputting HTML: div
3842
3843 sub git_print_header_div {
3844         my ($action, $title, $hash, $hash_base) = @_;
3845         my %args = ();
3846
3847         $args{'action'} = $action;
3848         $args{'hash'} = $hash if $hash;
3849         $args{'hash_base'} = $hash_base if $hash_base;
3850
3851         print "<div class=\"header\">\n" .
3852               $cgi->a({-href => href(%args), -class => "title"},
3853               $title ? $title : $action) .
3854               "\n</div>\n";
3855 }
3856
3857 sub format_repo_url {
3858         my ($name, $url) = @_;
3859         return "<tr class=\"metadata_url\"><td>$name</td><td>$url</td></tr>\n";
3860 }
3861
3862 # Group output by placing it in a DIV element and adding a header.
3863 # Options for start_div() can be provided by passing a hash reference as the
3864 # first parameter to the function.
3865 # Options to git_print_header_div() can be provided by passing an array
3866 # reference. This must follow the options to start_div if they are present.
3867 # The content can be a scalar, which is output as-is, a scalar reference, which
3868 # is output after html escaping, an IO handle passed either as *handle or
3869 # *handle{IO}, or a function reference. In the latter case all following
3870 # parameters will be taken as argument to the content function call.
3871 sub git_print_section {
3872         my ($div_args, $header_args, $content);
3873         my $arg = shift;
3874         if (ref($arg) eq 'HASH') {
3875                 $div_args = $arg;
3876                 $arg = shift;
3877         }
3878         if (ref($arg) eq 'ARRAY') {
3879                 $header_args = $arg;
3880                 $arg = shift;
3881         }
3882         $content = $arg;
3883
3884         print $cgi->start_div($div_args);
3885         git_print_header_div(@$header_args);
3886
3887         if (ref($content) eq 'CODE') {
3888                 $content->(@_);
3889         } elsif (ref($content) eq 'SCALAR') {
3890                 print esc_html($$content);
3891         } elsif (ref($content) eq 'GLOB' or ref($content) eq 'IO::Handle') {
3892                 print <$content>;
3893         } elsif (!ref($content) && defined($content)) {
3894                 print $content;
3895         }
3896
3897         print $cgi->end_div;
3898 }
3899
3900 sub print_local_time {
3901         print format_local_time(@_);
3902 }
3903
3904 sub format_local_time {
3905         my $localtime = '';
3906         my %date = @_;
3907         if ($date{'hour_local'} < 6) {
3908                 $localtime .= sprintf(" (<span class=\"atnight\">%02d:%02d</span> %s)",
3909                         $date{'hour_local'}, $date{'minute_local'}, $date{'tz_local'});
3910         } else {
3911                 $localtime .= sprintf(" (%02d:%02d %s)",
3912                         $date{'hour_local'}, $date{'minute_local'}, $date{'tz_local'});
3913         }
3914
3915         return $localtime;
3916 }
3917
3918 # Outputs the author name and date in long form
3919 sub git_print_authorship {
3920         my $co = shift;
3921         my %opts = @_;
3922         my $tag = $opts{-tag} || 'div';
3923         my $author = $co->{'author_name'};
3924
3925         my %ad = parse_date($co->{'author_epoch'}, $co->{'author_tz'});
3926         print "<$tag class=\"author_date\">" .
3927               format_search_author($author, "author", esc_html($author)) .
3928               " [$ad{'rfc2822'}";
3929         print_local_time(%ad) if ($opts{-localtime});
3930         print "]" . git_get_avatar($co->{'author_email'}, -pad_before => 1)
3931                   . "</$tag>\n";
3932 }
3933
3934 # Outputs table rows containing the full author or committer information,
3935 # in the format expected for 'commit' view (& similar).
3936 # Parameters are a commit hash reference, followed by the list of people
3937 # to output information for. If the list is empty it defaults to both
3938 # author and committer.
3939 sub git_print_authorship_rows {
3940         my $co = shift;
3941         # too bad we can't use @people = @_ || ('author', 'committer')
3942         my @people = @_;
3943         @people = ('author', 'committer') unless @people;
3944         foreach my $who (@people) {
3945                 my %wd = parse_date($co->{"${who}_epoch"}, $co->{"${who}_tz"});
3946                 print "<tr><td>$who</td><td>" .
3947                       format_search_author($co->{"${who}_name"}, $who,
3948                                esc_html($co->{"${who}_name"})) . " " .
3949                       format_search_author($co->{"${who}_email"}, $who,
3950                                esc_html("<" . $co->{"${who}_email"} . ">")) .
3951                       "</td><td rowspan=\"2\">" .
3952                       git_get_avatar($co->{"${who}_email"}, -size => 'double') .
3953                       "</td></tr>\n" .
3954                       "<tr>" .
3955                       "<td></td><td> $wd{'rfc2822'}";
3956                 print_local_time(%wd);
3957                 print "</td>" .
3958                       "</tr>\n";
3959         }
3960 }
3961
3962 sub git_print_page_path {
3963         my $name = shift;
3964         my $type = shift;
3965         my $hb = shift;
3966
3967
3968         print "<div class=\"page_path\">";
3969         print $cgi->a({-href => href(action=>"tree", hash_base=>$hb),
3970                       -title => 'tree root'}, to_utf8("[$project]"));
3971         print " / ";
3972         if (defined $name) {
3973                 my @dirname = split '/', $name;
3974                 my $basename = pop @dirname;
3975                 my $fullname = '';
3976
3977                 foreach my $dir (@dirname) {
3978                         $fullname .= ($fullname ? '/' : '') . $dir;
3979                         print $cgi->a({-href => href(action=>"tree", file_name=>$fullname,
3980                                                      hash_base=>$hb),
3981                                       -title => $fullname}, esc_path($dir));
3982                         print " / ";
3983                 }
3984                 if (defined $type && $type eq 'blob') {
3985                         print $cgi->a({-href => href(action=>"blob_plain", file_name=>$file_name,
3986                                                      hash_base=>$hb),
3987                                       -title => $name}, esc_path($basename));
3988                 } elsif (defined $type && $type eq 'tree') {
3989                         print $cgi->a({-href => href(action=>"tree", file_name=>$file_name,
3990                                                      hash_base=>$hb),
3991                                       -title => $name}, esc_path($basename));
3992                         print " / ";
3993                 } else {
3994                         print esc_path($basename);
3995                 }
3996         }
3997         print "<br/></div>\n";
3998 }
3999
4000 sub git_print_log {
4001         my $log = shift;
4002         my %opts = @_;
4003
4004         if ($opts{'-remove_title'}) {
4005                 # remove title, i.e. first line of log
4006                 shift @$log;
4007         }
4008         # remove leading empty lines
4009         while (defined $log->[0] && $log->[0] eq "") {
4010                 shift @$log;
4011         }
4012
4013         # print log
4014         my $signoff = 0;
4015         my $empty = 0;
4016         foreach my $line (@$log) {
4017                 if ($line =~ m/^ *(signed[ \-]off[ \-]by[ :]|acked[ \-]by[ :]|cc[ :])/i) {
4018                         $signoff = 1;
4019                         $empty = 0;
4020                         if (! $opts{'-remove_signoff'}) {
4021                                 print "<span class=\"signoff\">" . esc_html($line) . "</span><br/>\n";
4022                                 next;
4023                         } else {
4024                                 # remove signoff lines
4025                                 next;
4026                         }
4027                 } else {
4028                         $signoff = 0;
4029                 }
4030
4031                 # print only one empty line
4032                 # do not print empty line after signoff
4033                 if ($line eq "") {
4034                         next if ($empty || $signoff);
4035                         $empty = 1;
4036                 } else {
4037                         $empty = 0;
4038                 }
4039
4040                 print format_log_line_html($line) . "<br/>\n";
4041         }
4042
4043         if ($opts{'-final_empty_line'}) {
4044                 # end with single empty line
4045                 print "<br/>\n" unless $empty;
4046         }
4047 }
4048
4049 # return link target (what link points to)
4050 sub git_get_link_target {
4051         my $hash = shift;
4052         my $link_target;
4053
4054         # read link
4055         open my $fd, "-|", git_cmd(), "cat-file", "blob", $hash
4056                 or return;
4057         {
4058                 local $/ = undef;
4059                 $link_target = <$fd>;
4060         }
4061         close $fd
4062                 or return;
4063
4064         return $link_target;
4065 }
4066
4067 # given link target, and the directory (basedir) the link is in,
4068 # return target of link relative to top directory (top tree);
4069 # return undef if it is not possible (including absolute links).
4070 sub normalize_link_target {
4071         my ($link_target, $basedir) = @_;
4072
4073         # absolute symlinks (beginning with '/') cannot be normalized
4074         return if (substr($link_target, 0, 1) eq '/');
4075
4076         # normalize link target to path from top (root) tree (dir)
4077         my $path;
4078         if ($basedir) {
4079                 $path = $basedir . '/' . $link_target;
4080         } else {
4081                 # we are in top (root) tree (dir)
4082                 $path = $link_target;
4083         }
4084
4085         # remove //, /./, and /../
4086         my @path_parts;
4087         foreach my $part (split('/', $path)) {
4088                 # discard '.' and ''
4089                 next if (!$part || $part eq '.');
4090                 # handle '..'
4091                 if ($part eq '..') {
4092                         if (@path_parts) {
4093                                 pop @path_parts;
4094                         } else {
4095                                 # link leads outside repository (outside top dir)
4096                                 return;
4097                         }
4098                 } else {
4099                         push @path_parts, $part;
4100                 }
4101         }
4102         $path = join('/', @path_parts);
4103
4104         return $path;
4105 }
4106
4107 # print tree entry (row of git_tree), but without encompassing <tr> element
4108 sub git_print_tree_entry {
4109         my ($t, $basedir, $hash_base, $have_blame) = @_;
4110
4111         my %base_key = ();
4112         $base_key{'hash_base'} = $hash_base if defined $hash_base;
4113
4114         # The format of a table row is: mode list link.  Where mode is
4115         # the mode of the entry, list is the name of the entry, an href,
4116         # and link is the action links of the entry.
4117
4118         print "<td class=\"mode\">" . mode_str($t->{'mode'}) . "</td>\n";
4119         if (exists $t->{'size'}) {
4120                 print "<td class=\"size\">$t->{'size'}</td>\n";
4121         }
4122         if ($t->{'type'} eq "blob") {
4123                 print "<td class=\"list\">" .
4124                         $cgi->a({-href => href(action=>"blob", hash=>$t->{'hash'},
4125                                                file_name=>"$basedir$t->{'name'}", %base_key),
4126                                 -class => "list"}, esc_path($t->{'name'}));
4127                 if (S_ISLNK(oct $t->{'mode'})) {
4128                         my $link_target = git_get_link_target($t->{'hash'});
4129                         if ($link_target) {
4130                                 my $norm_target = normalize_link_target($link_target, $basedir);
4131                                 if (defined $norm_target) {
4132                                         print " -> " .
4133                                               $cgi->a({-href => href(action=>"object", hash_base=>$hash_base,
4134                                                                      file_name=>$norm_target),
4135                                                        -title => $norm_target}, esc_path($link_target));
4136                                 } else {
4137                                         print " -> " . esc_path($link_target);
4138                                 }
4139                         }
4140                 }
4141                 print "</td>\n";
4142                 print "<td class=\"link\">";
4143                 print $cgi->a({-href => href(action=>"blob", hash=>$t->{'hash'},
4144                                              file_name=>"$basedir$t->{'name'}", %base_key)},
4145                               "blob");
4146                 if ($have_blame) {
4147                         print " | " .
4148                               $cgi->a({-href => href(action=>"blame", hash=>$t->{'hash'},
4149                                                      file_name=>"$basedir$t->{'name'}", %base_key)},
4150                                       "blame");
4151                 }
4152                 if (defined $hash_base) {
4153                         print " | " .
4154                               $cgi->a({-href => href(action=>"history", hash_base=>$hash_base,
4155                                                      hash=>$t->{'hash'}, file_name=>"$basedir$t->{'name'}")},
4156                                       "history");
4157                 }
4158                 print " | " .
4159                         $cgi->a({-href => href(action=>"blob_plain", hash_base=>$hash_base,
4160                                                file_name=>"$basedir$t->{'name'}")},
4161                                 "raw");
4162                 print "</td>\n";
4163
4164         } elsif ($t->{'type'} eq "tree") {
4165                 print "<td class=\"list\">";
4166                 print $cgi->a({-href => href(action=>"tree", hash=>$t->{'hash'},
4167                                              file_name=>"$basedir$t->{'name'}",
4168                                              %base_key)},
4169                               esc_path($t->{'name'}));
4170                 print "</td>\n";
4171                 print "<td class=\"link\">";
4172                 print $cgi->a({-href => href(action=>"tree", hash=>$t->{'hash'},
4173                                              file_name=>"$basedir$t->{'name'}",
4174                                              %base_key)},
4175                               "tree");
4176                 if (defined $hash_base) {
4177                         print " | " .
4178                               $cgi->a({-href => href(action=>"history", hash_base=>$hash_base,
4179                                                      file_name=>"$basedir$t->{'name'}")},
4180                                       "history");
4181                 }
4182                 print "</td>\n";
4183         } else {
4184                 # unknown object: we can only present history for it
4185                 # (this includes 'commit' object, i.e. submodule support)
4186                 print "<td class=\"list\">" .
4187                       esc_path($t->{'name'}) .
4188                       "</td>\n";
4189                 print "<td class=\"link\">";
4190                 if (defined $hash_base) {
4191                         print $cgi->a({-href => href(action=>"history",
4192                                                      hash_base=>$hash_base,
4193                                                      file_name=>"$basedir$t->{'name'}")},
4194                                       "history");
4195                 }
4196                 print "</td>\n";
4197         }
4198 }
4199
4200 ## ......................................................................
4201 ## functions printing large fragments of HTML
4202
4203 # get pre-image filenames for merge (combined) diff
4204 sub fill_from_file_info {
4205         my ($diff, @parents) = @_;
4206
4207         $diff->{'from_file'} = [ ];
4208         $diff->{'from_file'}[$diff->{'nparents'} - 1] = undef;
4209         for (my $i = 0; $i < $diff->{'nparents'}; $i++) {
4210                 if ($diff->{'status'}[$i] eq 'R' ||
4211                     $diff->{'status'}[$i] eq 'C') {
4212                         $diff->{'from_file'}[$i] =
4213                                 git_get_path_by_hash($parents[$i], $diff->{'from_id'}[$i]);
4214                 }
4215         }
4216
4217         return $diff;
4218 }
4219
4220 # is current raw difftree line of file deletion
4221 sub is_deleted {
4222         my $diffinfo = shift;
4223
4224         return $diffinfo->{'to_id'} eq ('0' x 40);
4225 }
4226
4227 # does patch correspond to [previous] difftree raw line
4228 # $diffinfo  - hashref of parsed raw diff format
4229 # $patchinfo - hashref of parsed patch diff format
4230 #              (the same keys as in $diffinfo)
4231 sub is_patch_split {
4232         my ($diffinfo, $patchinfo) = @_;
4233
4234         return defined $diffinfo && defined $patchinfo
4235                 && $diffinfo->{'to_file'} eq $patchinfo->{'to_file'};
4236 }
4237
4238
4239 sub git_difftree_body {
4240         my ($difftree, $hash, @parents) = @_;
4241         my ($parent) = $parents[0];
4242         my $have_blame = gitweb_check_feature('blame');
4243         print "<div class=\"list_head\">\n";
4244         if ($#{$difftree} > 10) {
4245                 print(($#{$difftree} + 1) . " files changed:\n");
4246         }
4247         print "</div>\n";
4248
4249         print "<table class=\"" .
4250               (@parents > 1 ? "combined " : "") .
4251               "diff_tree\">\n";
4252
4253         # header only for combined diff in 'commitdiff' view
4254         my $has_header = @$difftree && @parents > 1 && $action eq 'commitdiff';
4255         if ($has_header) {
4256                 # table header
4257                 print "<thead><tr>\n" .
4258                        "<th></th><th></th>\n"; # filename, patchN link
4259                 for (my $i = 0; $i < @parents; $i++) {
4260                         my $par = $parents[$i];
4261                         print "<th>" .
4262                               $cgi->a({-href => href(action=>"commitdiff",
4263                                                      hash=>$hash, hash_parent=>$par),
4264                                        -title => 'commitdiff to parent number ' .
4265                                                   ($i+1) . ': ' . substr($par,0,7)},
4266                                       $i+1) .
4267                               "&nbsp;</th>\n";
4268                 }
4269                 print "</tr></thead>\n<tbody>\n";
4270         }
4271
4272         my $alternate = 1;
4273         my $patchno = 0;
4274         foreach my $line (@{$difftree}) {
4275                 my $diff = parsed_difftree_line($line);
4276
4277                 if ($alternate) {
4278                         print "<tr class=\"dark\">\n";
4279                 } else {
4280                         print "<tr class=\"light\">\n";
4281                 }
4282                 $alternate ^= 1;
4283
4284                 if (exists $diff->{'nparents'}) { # combined diff
4285
4286                         fill_from_file_info($diff, @parents)
4287                                 unless exists $diff->{'from_file'};
4288
4289                         if (!is_deleted($diff)) {
4290                                 # file exists in the result (child) commit
4291                                 print "<td>" .
4292                                       $cgi->a({-href => href(action=>"blob", hash=>$diff->{'to_id'},
4293                                                              file_name=>$diff->{'to_file'},
4294                                                              hash_base=>$hash),
4295                                               -class => "list"}, esc_path($diff->{'to_file'})) .
4296                                       "</td>\n";
4297                         } else {
4298                                 print "<td>" .
4299                                       esc_path($diff->{'to_file'}) .
4300                                       "</td>\n";
4301                         }
4302
4303                         if ($action eq 'commitdiff') {
4304                                 # link to patch
4305                                 $patchno++;
4306                                 print "<td class=\"link\">" .
4307                                       $cgi->a({-href => "#patch$patchno"}, "patch") .
4308                                       " | " .
4309                                       "</td>\n";
4310                         }
4311
4312                         my $has_history = 0;
4313                         my $not_deleted = 0;
4314                         for (my $i = 0; $i < $diff->{'nparents'}; $i++) {
4315                                 my $hash_parent = $parents[$i];
4316                                 my $from_hash = $diff->{'from_id'}[$i];
4317                                 my $from_path = $diff->{'from_file'}[$i];
4318                                 my $status = $diff->{'status'}[$i];
4319
4320                                 $has_history ||= ($status ne 'A');
4321                                 $not_deleted ||= ($status ne 'D');
4322
4323                                 if ($status eq 'A') {
4324                                         print "<td  class=\"link\" align=\"right\"> | </td>\n";
4325                                 } elsif ($status eq 'D') {
4326                                         print "<td class=\"link\">" .
4327                                               $cgi->a({-href => href(action=>"blob",
4328                                                                      hash_base=>$hash,
4329                                                                      hash=>$from_hash,
4330                                                                      file_name=>$from_path)},
4331                                                       "blob" . ($i+1)) .
4332                                               " | </td>\n";
4333                                 } else {
4334                                         if ($diff->{'to_id'} eq $from_hash) {
4335                                                 print "<td class=\"link nochange\">";
4336                                         } else {
4337                                                 print "<td class=\"link\">";
4338                                         }
4339                                         print $cgi->a({-href => href(action=>"blobdiff",
4340                                                                      hash=>$diff->{'to_id'},
4341                                                                      hash_parent=>$from_hash,
4342                                                                      hash_base=>$hash,
4343                                                                      hash_parent_base=>$hash_parent,
4344                                                                      file_name=>$diff->{'to_file'},
4345                                                                      file_parent=>$from_path)},
4346                                                       "diff" . ($i+1)) .
4347                                               " | </td>\n";
4348                                 }
4349                         }
4350
4351                         print "<td class=\"link\">";
4352                         if ($not_deleted) {
4353                                 print $cgi->a({-href => href(action=>"blob",
4354                                                              hash=>$diff->{'to_id'},
4355                                                              file_name=>$diff->{'to_file'},
4356                                                              hash_base=>$hash)},
4357                                               "blob");
4358                                 print " | " if ($has_history);
4359                         }
4360                         if ($has_history) {
4361                                 print $cgi->a({-href => href(action=>"history",
4362                                                              file_name=>$diff->{'to_file'},
4363                                                              hash_base=>$hash)},
4364                                               "history");
4365                         }
4366                         print "</td>\n";
4367
4368                         print "</tr>\n";
4369                         next; # instead of 'else' clause, to avoid extra indent
4370                 }
4371                 # else ordinary diff
4372
4373                 my ($to_mode_oct, $to_mode_str, $to_file_type);
4374                 my ($from_mode_oct, $from_mode_str, $from_file_type);
4375                 if ($diff->{'to_mode'} ne ('0' x 6)) {
4376                         $to_mode_oct = oct $diff->{'to_mode'};
4377                         if (S_ISREG($to_mode_oct)) { # only for regular file
4378                                 $to_mode_str = sprintf("%04o", $to_mode_oct & 0777); # permission bits
4379                         }
4380                         $to_file_type = file_type($diff->{'to_mode'});
4381                 }
4382                 if ($diff->{'from_mode'} ne ('0' x 6)) {
4383                         $from_mode_oct = oct $diff->{'from_mode'};
4384                         if (S_ISREG($to_mode_oct)) { # only for regular file
4385                                 $from_mode_str = sprintf("%04o", $from_mode_oct & 0777); # permission bits
4386                         }
4387                         $from_file_type = file_type($diff->{'from_mode'});
4388                 }
4389
4390                 if ($diff->{'status'} eq "A") { # created
4391                         my $mode_chng = "<span class=\"file_status new\">[new $to_file_type";
4392                         $mode_chng   .= " with mode: $to_mode_str" if $to_mode_str;
4393                         $mode_chng   .= "]</span>";
4394                         print "<td>";
4395                         print $cgi->a({-href => href(action=>"blob", hash=>$diff->{'to_id'},
4396                                                      hash_base=>$hash, file_name=>$diff->{'file'}),
4397                                       -class => "list"}, esc_path($diff->{'file'}));
4398                         print "</td>\n";
4399                         print "<td>$mode_chng</td>\n";
4400                         print "<td class=\"link\">";
4401                         if ($action eq 'commitdiff') {
4402                                 # link to patch
4403                                 $patchno++;
4404                                 print $cgi->a({-href => "#patch$patchno"}, "patch");
4405                                 print " | ";
4406                         }
4407                         print $cgi->a({-href => href(action=>"blob", hash=>$diff->{'to_id'},
4408                                                      hash_base=>$hash, file_name=>$diff->{'file'})},
4409                                       "blob");
4410                         print "</td>\n";
4411
4412                 } elsif ($diff->{'status'} eq "D") { # deleted
4413                         my $mode_chng = "<span class=\"file_status deleted\">[deleted $from_file_type]</span>";
4414                         print "<td>";
4415                         print $cgi->a({-href => href(action=>"blob", hash=>$diff->{'from_id'},
4416                                                      hash_base=>$parent, file_name=>$diff->{'file'}),
4417                                        -class => "list"}, esc_path($diff->{'file'}));
4418                         print "</td>\n";
4419                         print "<td>$mode_chng</td>\n";
4420                         print "<td class=\"link\">";
4421                         if ($action eq 'commitdiff') {
4422                                 # link to patch
4423                                 $patchno++;
4424                                 print $cgi->a({-href => "#patch$patchno"}, "patch");
4425                                 print " | ";
4426                         }
4427                         print $cgi->a({-href => href(action=>"blob", hash=>$diff->{'from_id'},
4428                                                      hash_base=>$parent, file_name=>$diff->{'file'})},
4429                                       "blob") . " | ";
4430                         if ($have_blame) {
4431                                 print $cgi->a({-href => href(action=>"blame", hash_base=>$parent,
4432                                                              file_name=>$diff->{'file'})},
4433                                               "blame") . " | ";
4434                         }
4435                         print $cgi->a({-href => href(action=>"history", hash_base=>$parent,
4436                                                      file_name=>$diff->{'file'})},
4437                                       "history");
4438                         print "</td>\n";
4439
4440                 } elsif ($diff->{'status'} eq "M" || $diff->{'status'} eq "T") { # modified, or type changed
4441                         my $mode_chnge = "";
4442                         if ($diff->{'from_mode'} != $diff->{'to_mode'}) {
4443                                 $mode_chnge = "<span class=\"file_status mode_chnge\">[changed";
4444                                 if ($from_file_type ne $to_file_type) {
4445                                         $mode_chnge .= " from $from_file_type to $to_file_type";
4446                                 }
4447                                 if (($from_mode_oct & 0777) != ($to_mode_oct & 0777)) {
4448                                         if ($from_mode_str && $to_mode_str) {
4449                                                 $mode_chnge .= " mode: $from_mode_str->$to_mode_str";
4450                                         } elsif ($to_mode_str) {
4451                                                 $mode_chnge .= " mode: $to_mode_str";
4452                                         }
4453                                 }
4454                                 $mode_chnge .= "]</span>\n";
4455                         }
4456                         print "<td>";
4457                         print $cgi->a({-href => href(action=>"blob", hash=>$diff->{'to_id'},
4458                                                      hash_base=>$hash, file_name=>$diff->{'file'}),
4459                                       -class => "list"}, esc_path($diff->{'file'}));
4460                         print "</td>\n";
4461                         print "<td>$mode_chnge</td>\n";
4462                         print "<td class=\"link\">";
4463                         if ($action eq 'commitdiff') {
4464                                 # link to patch
4465                                 $patchno++;
4466                                 print $cgi->a({-href => "#patch$patchno"}, "patch") .
4467                                       " | ";
4468                         } elsif ($diff->{'to_id'} ne $diff->{'from_id'}) {
4469                                 # "commit" view and modified file (not onlu mode changed)
4470                                 print $cgi->a({-href => href(action=>"blobdiff",
4471                                                              hash=>$diff->{'to_id'}, hash_parent=>$diff->{'from_id'},
4472                                                              hash_base=>$hash, hash_parent_base=>$parent,
4473                                                              file_name=>$diff->{'file'})},
4474                                               "diff") .
4475                                       " | ";
4476                         }
4477                         print $cgi->a({-href => href(action=>"blob", hash=>$diff->{'to_id'},
4478                                                      hash_base=>$hash, file_name=>$diff->{'file'})},
4479                                        "blob") . " | ";
4480                         if ($have_blame) {
4481                                 print $cgi->a({-href => href(action=>"blame", hash_base=>$hash,
4482                                                              file_name=>$diff->{'file'})},
4483                                               "blame") . " | ";
4484                         }
4485                         print $cgi->a({-href => href(action=>"history", hash_base=>$hash,
4486                                                      file_name=>$diff->{'file'})},
4487                                       "history");
4488                         print "</td>\n";
4489
4490                 } elsif ($diff->{'status'} eq "R" || $diff->{'status'} eq "C") { # renamed or copied
4491                         my %status_name = ('R' => 'moved', 'C' => 'copied');
4492                         my $nstatus = $status_name{$diff->{'status'}};
4493                         my $mode_chng = "";
4494                         if ($diff->{'from_mode'} != $diff->{'to_mode'}) {
4495                                 # mode also for directories, so we cannot use $to_mode_str
4496                                 $mode_chng = sprintf(", mode: %04o", $to_mode_oct & 0777);
4497                         }
4498                         print "<td>" .
4499                               $cgi->a({-href => href(action=>"blob", hash_base=>$hash,
4500                                                      hash=>$diff->{'to_id'}, file_name=>$diff->{'to_file'}),
4501                                       -class => "list"}, esc_path($diff->{'to_file'})) . "</td>\n" .
4502                               "<td><span class=\"file_status $nstatus\">[$nstatus from " .
4503                               $cgi->a({-href => href(action=>"blob", hash_base=>$parent,
4504                                                      hash=>$diff->{'from_id'}, file_name=>$diff->{'from_file'}),
4505                                       -class => "list"}, esc_path($diff->{'from_file'})) .
4506                               " with " . (int $diff->{'similarity'}) . "% similarity$mode_chng]</span></td>\n" .
4507                               "<td class=\"link\">";
4508                         if ($action eq 'commitdiff') {
4509                                 # link to patch
4510                                 $patchno++;
4511                                 print $cgi->a({-href => "#patch$patchno"}, "patch") .
4512                                       " | ";
4513                         } elsif ($diff->{'to_id'} ne $diff->{'from_id'}) {
4514                                 # "commit" view and modified file (not only pure rename or copy)
4515                                 print $cgi->a({-href => href(action=>"blobdiff",
4516                                                              hash=>$diff->{'to_id'}, hash_parent=>$diff->{'from_id'},
4517                                                              hash_base=>$hash, hash_parent_base=>$parent,
4518                                                              file_name=>$diff->{'to_file'}, file_parent=>$diff->{'from_file'})},
4519                                               "diff") .
4520                                       " | ";
4521                         }
4522                         print $cgi->a({-href => href(action=>"blob", hash=>$diff->{'to_id'},
4523                                                      hash_base=>$parent, file_name=>$diff->{'to_file'})},
4524                                       "blob") . " | ";
4525                         if ($have_blame) {
4526                                 print $cgi->a({-href => href(action=>"blame", hash_base=>$hash,
4527                                                              file_name=>$diff->{'to_file'})},
4528                                               "blame") . " | ";
4529                         }
4530                         print $cgi->a({-href => href(action=>"history", hash_base=>$hash,
4531                                                     file_name=>$diff->{'to_file'})},
4532                                       "history");
4533                         print "</td>\n";
4534
4535                 } # we should not encounter Unmerged (U) or Unknown (X) status
4536                 print "</tr>\n";
4537         }
4538         print "</tbody>" if $has_header;
4539         print "</table>\n";
4540 }
4541
4542 sub git_patchset_body {
4543         my ($fd, $difftree, $hash, @hash_parents) = @_;
4544         my ($hash_parent) = $hash_parents[0];
4545
4546         my $is_combined = (@hash_parents > 1);
4547         my $patch_idx = 0;
4548         my $patch_number = 0;
4549         my $patch_line;
4550         my $diffinfo;
4551         my $to_name;
4552         my (%from, %to);
4553
4554         print "<div class=\"patchset\">\n";
4555
4556         # skip to first patch
4557         while ($patch_line = <$fd>) {
4558                 chomp $patch_line;
4559
4560                 last if ($patch_line =~ m/^diff /);
4561         }
4562
4563  PATCH:
4564         while ($patch_line) {
4565
4566                 # parse "git diff" header line
4567                 if ($patch_line =~ m/^diff --git (\"(?:[^\\\"]*(?:\\.[^\\\"]*)*)\"|[^ "]*) (.*)$/) {
4568                         # $1 is from_name, which we do not use
4569                         $to_name = unquote($2);
4570                         $to_name =~ s!^b/!!;
4571                 } elsif ($patch_line =~ m/^diff --(cc|combined) ("?.*"?)$/) {
4572                         # $1 is 'cc' or 'combined', which we do not use
4573                         $to_name = unquote($2);
4574                 } else {
4575                         $to_name = undef;
4576                 }
4577
4578                 # check if current patch belong to current raw line
4579                 # and parse raw git-diff line if needed
4580                 if (is_patch_split($diffinfo, { 'to_file' => $to_name })) {
4581                         # this is continuation of a split patch
4582                         print "<div class=\"patch cont\">\n";
4583                 } else {
4584                         # advance raw git-diff output if needed
4585                         $patch_idx++ if defined $diffinfo;
4586
4587                         # read and prepare patch information
4588                         $diffinfo = parsed_difftree_line($difftree->[$patch_idx]);
4589
4590                         # compact combined diff output can have some patches skipped
4591                         # find which patch (using pathname of result) we are at now;
4592                         if ($is_combined) {
4593                                 while ($to_name ne $diffinfo->{'to_file'}) {
4594                                         print "<div class=\"patch\" id=\"patch". ($patch_idx+1) ."\">\n" .
4595                                               format_diff_cc_simplified($diffinfo, @hash_parents) .
4596                                               "</div>\n";  # class="patch"
4597
4598                                         $patch_idx++;
4599                                         $patch_number++;
4600
4601                                         last if $patch_idx > $#$difftree;
4602                                         $diffinfo = parsed_difftree_line($difftree->[$patch_idx]);
4603                                 }
4604                         }
4605
4606                         # modifies %from, %to hashes
4607                         parse_from_to_diffinfo($diffinfo, \%from, \%to, @hash_parents);
4608
4609                         # this is first patch for raw difftree line with $patch_idx index
4610                         # we index @$difftree array from 0, but number patches from 1
4611                         print "<div class=\"patch\" id=\"patch". ($patch_idx+1) ."\">\n";
4612                 }
4613
4614                 # git diff header
4615                 #assert($patch_line =~ m/^diff /) if DEBUG;
4616                 #assert($patch_line !~ m!$/$!) if DEBUG; # is chomp-ed
4617                 $patch_number++;
4618                 # print "git diff" header
4619                 print format_git_diff_header_line($patch_line, $diffinfo,
4620                                                   \%from, \%to);
4621
4622                 # print extended diff header
4623                 print "<div class=\"diff extended_header\">\n";
4624         EXTENDED_HEADER:
4625                 while ($patch_line = <$fd>) {
4626                         chomp $patch_line;
4627
4628                         last EXTENDED_HEADER if ($patch_line =~ m/^--- |^diff /);
4629
4630                         print format_extended_diff_header_line($patch_line, $diffinfo,
4631                                                                \%from, \%to);
4632                 }
4633                 print "</div>\n"; # class="diff extended_header"
4634
4635                 # from-file/to-file diff header
4636                 if (! $patch_line) {
4637                         print "</div>\n"; # class="patch"
4638                         last PATCH;
4639                 }
4640                 next PATCH if ($patch_line =~ m/^diff /);
4641                 #assert($patch_line =~ m/^---/) if DEBUG;
4642
4643                 my $last_patch_line = $patch_line;
4644                 $patch_line = <$fd>;
4645                 chomp $patch_line;
4646                 #assert($patch_line =~ m/^\+\+\+/) if DEBUG;
4647
4648                 print format_diff_from_to_header($last_patch_line, $patch_line,
4649                                                  $diffinfo, \%from, \%to,
4650                                                  @hash_parents);
4651
4652                 # the patch itself
4653         LINE:
4654                 while ($patch_line = <$fd>) {
4655                         chomp $patch_line;
4656
4657                         next PATCH if ($patch_line =~ m/^diff /);
4658
4659                         print format_diff_line($patch_line, \%from, \%to);
4660                 }
4661
4662         } continue {
4663                 print "</div>\n"; # class="patch"
4664         }
4665
4666         # for compact combined (--cc) format, with chunk and patch simplification
4667         # the patchset might be empty, but there might be unprocessed raw lines
4668         for (++$patch_idx if $patch_number > 0;
4669              $patch_idx < @$difftree;
4670              ++$patch_idx) {
4671                 # read and prepare patch information
4672                 $diffinfo = parsed_difftree_line($difftree->[$patch_idx]);
4673
4674                 # generate anchor for "patch" links in difftree / whatchanged part
4675                 print "<div class=\"patch\" id=\"patch". ($patch_idx+1) ."\">\n" .
4676                       format_diff_cc_simplified($diffinfo, @hash_parents) .
4677                       "</div>\n";  # class="patch"
4678
4679                 $patch_number++;
4680         }
4681
4682         if ($patch_number == 0) {
4683                 if (@hash_parents > 1) {
4684                         print "<div class=\"diff nodifferences\">Trivial merge</div>\n";
4685                 } else {
4686                         print "<div class=\"diff nodifferences\">No differences found</div>\n";
4687                 }
4688         }
4689
4690         print "</div>\n"; # class="patchset"
4691 }
4692
4693 # . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
4694
4695 # fills project list info (age, description, owner, forks) for each
4696 # project in the list, removing invalid projects from returned list
4697 # NOTE: modifies $projlist, but does not remove entries from it
4698 sub fill_project_list_info {
4699         my ($projlist, $check_forks) = @_;
4700         my @projects;
4701
4702         my $show_ctags = gitweb_check_feature('ctags');
4703  PROJECT:
4704         foreach my $pr (@$projlist) {
4705                 my (@activity) = git_get_last_activity($pr->{'path'});
4706                 unless (@activity) {
4707                         next PROJECT;
4708                 }
4709                 ($pr->{'age'}, $pr->{'age_string'}) = @activity;
4710                 if (!defined $pr->{'descr'}) {
4711                         my $descr = git_get_project_description($pr->{'path'}) || "";
4712                         $descr = to_utf8($descr);
4713                         $pr->{'descr_long'} = $descr;
4714                         $pr->{'descr'} = chop_str($descr, $projects_list_description_width, 5);
4715                 }
4716                 if (!defined $pr->{'owner'}) {
4717                         $pr->{'owner'} = git_get_project_owner("$pr->{'path'}") || "";
4718                 }
4719                 if ($check_forks) {
4720                         my $pname = $pr->{'path'};
4721                         if (($pname =~ s/\.git$//) &&
4722                             ($pname !~ /\/$/) &&
4723                             (-d "$projectroot/$pname")) {
4724                                 $pr->{'forks'} = "-d $projectroot/$pname";
4725                         } else {
4726                                 $pr->{'forks'} = 0;
4727                         }
4728                 }
4729                 $show_ctags and $pr->{'ctags'} = git_get_project_ctags($pr->{'path'});
4730                 push @projects, $pr;
4731         }
4732
4733         return @projects;
4734 }
4735
4736 # print 'sort by' <th> element, generating 'sort by $name' replay link
4737 # if that order is not selected
4738 sub print_sort_th {
4739         print format_sort_th(@_);
4740 }
4741
4742 sub format_sort_th {
4743         my ($name, $order, $header) = @_;
4744         my $sort_th = "";
4745         $header ||= ucfirst($name);
4746
4747         if ($order eq $name) {
4748                 $sort_th .= "<th>$header</th>\n";
4749         } else {
4750                 $sort_th .= "<th>" .
4751                             $cgi->a({-href => href(-replay=>1, order=>$name),
4752                                      -class => "header"}, $header) .
4753                             "</th>\n";
4754         }
4755
4756         return $sort_th;
4757 }
4758
4759 sub git_project_list_body {
4760         # actually uses global variable $project
4761         my ($projlist, $order, $from, $to, $extra, $no_header) = @_;
4762
4763         my $check_forks = gitweb_check_feature('forks');
4764         my @projects = fill_project_list_info($projlist, $check_forks);
4765
4766         $order ||= $default_projects_order;
4767         $from = 0 unless defined $from;
4768         $to = $#projects if (!defined $to || $#projects < $to);
4769
4770         my %order_info = (
4771                 project => { key => 'path', type => 'str' },
4772                 descr => { key => 'descr_long', type => 'str' },
4773                 owner => { key => 'owner', type => 'str' },
4774                 age => { key => 'age', type => 'num' }
4775         );
4776         my $oi = $order_info{$order};
4777         if ($oi->{'type'} eq 'str') {
4778                 @projects = sort {$a->{$oi->{'key'}} cmp $b->{$oi->{'key'}}} @projects;
4779         } else {
4780                 @projects = sort {$a->{$oi->{'key'}} <=> $b->{$oi->{'key'}}} @projects;
4781         }
4782
4783         my $show_ctags = gitweb_check_feature('ctags');
4784         if ($show_ctags) {
4785                 my %ctags;
4786                 foreach my $p (@projects) {
4787                         foreach my $ct (keys %{$p->{'ctags'}}) {
4788                                 $ctags{$ct} += $p->{'ctags'}->{$ct};
4789                         }
4790                 }
4791                 my $cloud = git_populate_project_tagcloud(\%ctags);
4792                 print git_show_project_tagcloud($cloud, 64);
4793         }
4794
4795         print "<table class=\"project_list\">\n";
4796         unless ($no_header) {
4797                 print "<tr>\n";
4798                 if ($check_forks) {
4799                         print "<th></th>\n";
4800                 }
4801                 print_sort_th('project', $order, 'Project');
4802                 print_sort_th('descr', $order, 'Description');
4803                 print_sort_th('owner', $order, 'Owner');
4804                 print_sort_th('age', $order, 'Last Change');
4805                 print "<th></th>\n" . # for links
4806                       "</tr>\n";
4807         }
4808         my $alternate = 1;
4809         my $tagfilter = $cgi->param('by_tag');
4810         for (my $i = $from; $i <= $to; $i++) {
4811                 my $pr = $projects[$i];
4812
4813                 next if $tagfilter and $show_ctags and not grep { lc $_ eq lc $tagfilter } keys %{$pr->{'ctags'}};
4814                 next if $searchtext and not $pr->{'path'} =~ /$searchtext/
4815                         and not $pr->{'descr_long'} =~ /$searchtext/;
4816                 # Weed out forks or non-matching entries of search
4817                 if ($check_forks) {
4818                         my $forkbase = $project; $forkbase ||= ''; $forkbase =~ s#\.git$#/#;
4819                         $forkbase="^$forkbase" if $forkbase;
4820                         next if not $searchtext and not $tagfilter and $show_ctags
4821                                 and $pr->{'path'} =~ m#$forkbase.*/.*#; # regexp-safe
4822                 }
4823
4824                 if ($alternate) {
4825                         print "<tr class=\"dark\">\n";
4826                 } else {
4827                         print "<tr class=\"light\">\n";
4828                 }
4829                 $alternate ^= 1;
4830                 if ($check_forks) {
4831                         print "<td>";
4832                         if ($pr->{'forks'}) {
4833                                 print "<!-- $pr->{'forks'} -->\n";
4834                                 print $cgi->a({-href => href(project=>$pr->{'path'}, action=>"forks")}, "+");
4835                         }
4836                         print "</td>\n";
4837                 }
4838                 print "<td>" . $cgi->a({-href => href(project=>$pr->{'path'}, action=>"summary"),
4839                                         -class => "list"}, esc_html($pr->{'path'})) . "</td>\n" .
4840                       "<td>" . $cgi->a({-href => href(project=>$pr->{'path'}, action=>"summary"),
4841                                         -class => "list", -title => $pr->{'descr_long'}},
4842                                         esc_html($pr->{'descr'})) . "</td>\n" .
4843                       "<td><i>" . chop_and_escape_str($pr->{'owner'}, 15) . "</i></td>\n";
4844                 print "<td class=\"". age_class($pr->{'age'}) . "\">" .
4845                       (defined $pr->{'age_string'} ? $pr->{'age_string'} : "No commits") . "</td>\n" .
4846                       "<td class=\"link\">" .
4847                       $cgi->a({-href => href(project=>$pr->{'path'}, action=>"summary")}, "summary")   . " | " .
4848                       $cgi->a({-href => href(project=>$pr->{'path'}, action=>"shortlog")}, "shortlog") . " | " .
4849                       $cgi->a({-href => href(project=>$pr->{'path'}, action=>"log")}, "log") . " | " .
4850                       $cgi->a({-href => href(project=>$pr->{'path'}, action=>"tree")}, "tree") .
4851                       ($pr->{'forks'} ? " | " . $cgi->a({-href => href(project=>$pr->{'path'}, action=>"forks")}, "forks") : '') .
4852                       "</td>\n" .
4853                       "</tr>\n";
4854         }
4855         if (defined $extra) {
4856                 print "<tr>\n";
4857                 if ($check_forks) {
4858                         print "<td></td>\n";
4859                 }
4860                 print "<td colspan=\"5\">$extra</td>\n" .
4861                       "</tr>\n";
4862         }
4863         print "</table>\n";
4864 }
4865
4866 sub git_log_body {
4867         # uses global variable $project
4868         my ($commitlist, $from, $to, $refs, $extra) = @_;
4869
4870         $from = 0 unless defined $from;
4871         $to = $#{$commitlist} if (!defined $to || $#{$commitlist} < $to);
4872
4873         for (my $i = 0; $i <= $to; $i++) {
4874                 my %co = %{$commitlist->[$i]};
4875                 next if !%co;
4876                 my $commit = $co{'id'};
4877                 my $ref = format_ref_marker($refs, $commit);
4878                 my %ad = parse_date($co{'author_epoch'});
4879                 git_print_header_div('commit',
4880                                "<span class=\"age\">$co{'age_string'}</span>" .
4881                                esc_html($co{'title'}) . $ref,
4882                                $commit);
4883                 print "<div class=\"title_text\">\n" .
4884                       "<div class=\"log_link\">\n" .
4885                       $cgi->a({-href => href(action=>"commit", hash=>$commit)}, "commit") .
4886                       " | " .
4887                       $cgi->a({-href => href(action=>"commitdiff", hash=>$commit)}, "commitdiff") .
4888                       " | " .
4889                       $cgi->a({-href => href(action=>"tree", hash=>$commit, hash_base=>$commit)}, "tree") .
4890                       "<br/>\n" .
4891                       "</div>\n";
4892                       git_print_authorship(\%co, -tag => 'span');
4893                       print "<br/>\n</div>\n";
4894
4895                 print "<div class=\"log_body\">\n";
4896                 git_print_log($co{'comment'}, -final_empty_line=> 1);
4897                 print "</div>\n";
4898         }
4899         if ($extra) {
4900                 print "<div class=\"page_nav\">\n";
4901                 print "$extra\n";
4902                 print "</div>\n";
4903         }
4904 }
4905
4906 sub git_shortlog_body {
4907         # uses global variable $project
4908         my ($commitlist, $from, $to, $refs, $extra) = @_;
4909
4910         $from = 0 unless defined $from;
4911         $to = $#{$commitlist} if (!defined $to || $#{$commitlist} < $to);
4912
4913         print "<table class=\"shortlog\">\n";
4914         my $alternate = 1;
4915         for (my $i = $from; $i <= $to; $i++) {
4916                 my %co = %{$commitlist->[$i]};
4917                 my $commit = $co{'id'};
4918                 my $ref = format_ref_marker($refs, $commit);
4919                 if ($alternate) {
4920                         print "<tr class=\"dark\">\n";
4921                 } else {
4922                         print "<tr class=\"light\">\n";
4923                 }
4924                 $alternate ^= 1;
4925                 # git_summary() used print "<td><i>$co{'age_string'}</i></td>\n" .
4926                 print "<td title=\"$co{'age_string_age'}\"><i>$co{'age_string_date'}</i></td>\n" .
4927                       format_author_html('td', \%co, 10) . "<td>";
4928                 print format_subject_html($co{'title'}, $co{'title_short'},
4929                                           href(action=>"commit", hash=>$commit), $ref);
4930                 print "</td>\n" .
4931                       "<td class=\"link\">" .
4932                       $cgi->a({-href => href(action=>"commit", hash=>$commit)}, "commit") . " | " .
4933                       $cgi->a({-href => href(action=>"commitdiff", hash=>$commit)}, "commitdiff") . " | " .
4934                       $cgi->a({-href => href(action=>"tree", hash=>$commit, hash_base=>$commit)}, "tree");
4935                 my $snapshot_links = format_snapshot_links($commit);
4936                 if (defined $snapshot_links) {
4937                         print " | " . $snapshot_links;
4938                 }
4939                 print "</td>\n" .
4940                       "</tr>\n";
4941         }
4942         if (defined $extra) {
4943                 print "<tr>\n" .
4944                       "<td colspan=\"4\">$extra</td>\n" .
4945                       "</tr>\n";
4946         }
4947         print "</table>\n";
4948 }
4949
4950 sub git_history_body {
4951         # Warning: assumes constant type (blob or tree) during history
4952         my ($commitlist, $from, $to, $refs, $extra,
4953             $file_name, $file_hash, $ftype) = @_;
4954
4955         $from = 0 unless defined $from;
4956         $to = $#{$commitlist} unless (defined $to && $to <= $#{$commitlist});
4957
4958         print "<table class=\"history\">\n";
4959         my $alternate = 1;
4960         for (my $i = $from; $i <= $to; $i++) {
4961                 my %co = %{$commitlist->[$i]};
4962                 if (!%co) {
4963                         next;
4964                 }
4965                 my $commit = $co{'id'};
4966
4967                 my $ref = format_ref_marker($refs, $commit);
4968
4969                 if ($alternate) {
4970                         print "<tr class=\"dark\">\n";
4971                 } else {
4972                         print "<tr class=\"light\">\n";
4973                 }
4974                 $alternate ^= 1;
4975                 print "<td title=\"$co{'age_string_age'}\"><i>$co{'age_string_date'}</i></td>\n" .
4976         # shortlog:   format_author_html('td', \%co, 10)
4977                       format_author_html('td', \%co, 15, 3) . "<td>";
4978                 # originally git_history used chop_str($co{'title'}, 50)
4979                 print format_subject_html($co{'title'}, $co{'title_short'},
4980                                           href(action=>"commit", hash=>$commit), $ref);
4981                 print "</td>\n" .
4982                       "<td class=\"link\">" .
4983                       $cgi->a({-href => href(action=>$ftype, hash_base=>$commit, file_name=>$file_name)}, $ftype) . " | " .
4984                       $cgi->a({-href => href(action=>"commitdiff", hash=>$commit)}, "commitdiff");
4985
4986                 if ($ftype eq 'blob') {
4987                         my $blob_current = $file_hash;
4988                         my $blob_parent  = git_get_hash_by_path($commit, $file_name);
4989                         if (defined $blob_current && defined $blob_parent &&
4990                                         $blob_current ne $blob_parent) {
4991                                 print " | " .
4992                                         $cgi->a({-href => href(action=>"blobdiff",
4993                                                                hash=>$blob_current, hash_parent=>$blob_parent,
4994                                                                hash_base=>$hash_base, hash_parent_base=>$commit,
4995                                                                file_name=>$file_name)},
4996                                                 "diff to current");
4997                         }
4998                 }
4999                 print "</td>\n" .
5000                       "</tr>\n";
5001         }
5002         if (defined $extra) {
5003                 print "<tr>\n" .
5004                       "<td colspan=\"4\">$extra</td>\n" .
5005                       "</tr>\n";
5006         }
5007         print "</table>\n";
5008 }
5009
5010 sub git_tags_body {
5011         # uses global variable $project
5012         my ($taglist, $from, $to, $extra) = @_;
5013         $from = 0 unless defined $from;
5014         $to = $#{$taglist} if (!defined $to || $#{$taglist} < $to);
5015
5016         print "<table class=\"tags\">\n";
5017         my $alternate = 1;
5018         for (my $i = $from; $i <= $to; $i++) {
5019                 my $entry = $taglist->[$i];
5020                 my %tag = %$entry;
5021                 my $comment = $tag{'subject'};
5022                 my $comment_short;
5023                 if (defined $comment) {
5024                         $comment_short = chop_str($comment, 30, 5);
5025                 }
5026                 if ($alternate) {
5027                         print "<tr class=\"dark\">\n";
5028                 } else {
5029                         print "<tr class=\"light\">\n";
5030                 }
5031                 $alternate ^= 1;
5032                 if (defined $tag{'age'}) {
5033                         print "<td><i>$tag{'age'}</i></td>\n";
5034                 } else {
5035                         print "<td></td>\n";
5036                 }
5037                 print "<td>" .
5038                       $cgi->a({-href => href(action=>$tag{'reftype'}, hash=>$tag{'refid'}),
5039                                -class => "list name"}, esc_html($tag{'name'})) .
5040                       "</td>\n" .
5041                       "<td>";
5042                 if (defined $comment) {
5043                         print format_subject_html($comment, $comment_short,
5044                                                   href(action=>"tag", hash=>$tag{'id'}));
5045                 }
5046                 print "</td>\n" .
5047                       "<td class=\"selflink\">";
5048                 if ($tag{'type'} eq "tag") {
5049                         print $cgi->a({-href => href(action=>"tag", hash=>$tag{'id'})}, "tag");
5050                 } else {
5051                         print "&nbsp;";
5052                 }
5053                 print "</td>\n" .
5054                       "<td class=\"link\">" . " | " .
5055                       $cgi->a({-href => href(action=>$tag{'reftype'}, hash=>$tag{'refid'})}, $tag{'reftype'});
5056                 if ($tag{'reftype'} eq "commit") {
5057                         print " | " . $cgi->a({-href => href(action=>"shortlog", hash=>$tag{'fullname'})}, "shortlog") .
5058                               " | " . $cgi->a({-href => href(action=>"log", hash=>$tag{'fullname'})}, "log");
5059                 } elsif ($tag{'reftype'} eq "blob") {
5060                         print " | " . $cgi->a({-href => href(action=>"blob_plain", hash=>$tag{'refid'})}, "raw");
5061                 }
5062                 print "</td>\n" .
5063                       "</tr>";
5064         }
5065         if (defined $extra) {
5066                 print "<tr>\n" .
5067                       "<td colspan=\"5\">$extra</td>\n" .
5068                       "</tr>\n";
5069         }
5070         print "</table>\n";
5071 }
5072
5073 sub git_heads_body {
5074         # uses global variable $project
5075         my ($headlist, $head, $from, $to, $extra) = @_;
5076         $from = 0 unless defined $from;
5077         $to = $#{$headlist} if (!defined $to || $#{$headlist} < $to);
5078
5079         print "<table class=\"heads\">\n";
5080         my $alternate = 1;
5081         for (my $i = $from; $i <= $to; $i++) {
5082                 my $entry = $headlist->[$i];
5083                 my %ref = %$entry;
5084                 my $curr = $ref{'id'} eq $head;
5085                 if ($alternate) {
5086                         print "<tr class=\"dark\">\n";
5087                 } else {
5088                         print "<tr class=\"light\">\n";
5089                 }
5090                 $alternate ^= 1;
5091                 print "<td><i>$ref{'age'}</i></td>\n" .
5092                       ($curr ? "<td class=\"current_head\">" : "<td>") .
5093                       $cgi->a({-href => href(action=>"shortlog", hash=>$ref{'fullname'}),
5094                                -class => "list name"},esc_html($ref{'name'})) .
5095                       "</td>\n" .
5096                       "<td class=\"link\">" .
5097                       $cgi->a({-href => href(action=>"shortlog", hash=>$ref{'fullname'})}, "shortlog") . " | " .
5098                       $cgi->a({-href => href(action=>"log", hash=>$ref{'fullname'})}, "log") . " | " .
5099                       $cgi->a({-href => href(action=>"tree", hash=>$ref{'fullname'}, hash_base=>$ref{'fullname'})}, "tree") .
5100                       "</td>\n" .
5101                       "</tr>";
5102         }
5103         if (defined $extra) {
5104                 print "<tr>\n" .
5105                       "<td colspan=\"3\">$extra</td>\n" .
5106                       "</tr>\n";
5107         }
5108         print "</table>\n";
5109 }
5110
5111 # Display a single remote block
5112 sub git_remote_block {
5113         my ($remote, $rdata, $limit, $head) = @_;
5114
5115         my $heads = $rdata->{'heads'};
5116         my $fetch = $rdata->{'fetch'};
5117         my $push = $rdata->{'push'};
5118
5119         my $urls_table = "<table class=\"projects_list\">\n" ;
5120
5121         if (defined $fetch) {
5122                 if ($fetch eq $push) {
5123                         $urls_table .= format_repo_url("URL", $fetch);
5124                 } else {
5125                         $urls_table .= format_repo_url("Fetch URL", $fetch);
5126                         $urls_table .= format_repo_url("Push URL", $push) if defined $push;
5127                 }
5128         } elsif (defined $push) {
5129                 $urls_table .= format_repo_url("Push URL", $push);
5130         } else {
5131                 $urls_table .= format_repo_url("", "No remote URL");
5132         }
5133
5134         $urls_table .= "</table>\n";
5135
5136         my $dots;
5137         if (defined $limit && $limit < @$heads) {
5138                 $dots = $cgi->a({-href => href(action=>"remotes", hash=>$remote)}, "...");
5139         }
5140
5141         print $urls_table;
5142         git_heads_body($heads, $head, 0, $limit, $dots);
5143 }
5144
5145 # Display a list of remote names with the respective fetch and push URLs
5146 sub git_remotes_list {
5147         my ($remotedata, $limit) = @_;
5148         print "<table class=\"heads\">\n";
5149         my $alternate = 1;
5150         my @remotes = sort keys %$remotedata;
5151
5152         my $limited = $limit && $limit < @remotes;
5153
5154         $#remotes = $limit - 1 if $limited;
5155
5156         while (my $remote = shift @remotes) {
5157                 my $rdata = $remotedata->{$remote};
5158                 my $fetch = $rdata->{'fetch'};
5159                 my $push = $rdata->{'push'};
5160                 if ($alternate) {
5161                         print "<tr class=\"dark\">\n";
5162                 } else {
5163                         print "<tr class=\"light\">\n";
5164                 }
5165                 $alternate ^= 1;
5166                 print "<td>" .
5167                       $cgi->a({-href=> href(action=>'remotes', hash=>$remote),
5168                                -class=> "list name"},esc_html($remote)) .
5169                       "</td>";
5170                 print "<td class=\"link\">" .
5171                       (defined $fetch ? $cgi->a({-href=> $fetch}, "fetch") : "fetch") .
5172                       " | " .
5173                       (defined $push ? $cgi->a({-href=> $push}, "push") : "push") .
5174                       "</td>";
5175
5176                 print "</tr>\n";
5177         }
5178
5179         if ($limited) {
5180                 print "<tr>\n" .
5181                       "<td colspan=\"3\">" .
5182                       $cgi->a({-href => href(action=>"remotes")}, "...") .
5183                       "</td>\n" . "</tr>\n";
5184         }
5185
5186         print "</table>";
5187 }
5188
5189 # Display remote heads grouped by remote, unless there are too many
5190 # remotes, in which case we only display the remote names
5191 sub git_remotes_body {
5192         my ($remotedata, $limit, $head) = @_;
5193         if ($limit and $limit < keys %$remotedata) {
5194                 git_remotes_list($remotedata, $limit);
5195         } else {
5196                 fill_remote_heads($remotedata);
5197                 while (my ($remote, $rdata) = each %$remotedata) {
5198                         git_print_section({-class=>"remote", -id=>$remote},
5199                                 ["remotes", $remote, $remote], sub {
5200                                         git_remote_block($remote, $rdata, $limit, $head);
5201                                 });
5202                 }
5203         }
5204 }
5205
5206 sub git_search_grep_body {
5207         my ($commitlist, $from, $to, $extra) = @_;
5208         $from = 0 unless defined $from;
5209         $to = $#{$commitlist} if (!defined $to || $#{$commitlist} < $to);
5210
5211         print "<table class=\"commit_search\">\n";
5212         my $alternate = 1;
5213         for (my $i = $from; $i <= $to; $i++) {
5214                 my %co = %{$commitlist->[$i]};
5215                 if (!%co) {
5216                         next;
5217                 }
5218                 my $commit = $co{'id'};
5219                 if ($alternate) {
5220                         print "<tr class=\"dark\">\n";
5221                 } else {
5222                         print "<tr class=\"light\">\n";
5223                 }
5224                 $alternate ^= 1;
5225                 print "<td title=\"$co{'age_string_age'}\"><i>$co{'age_string_date'}</i></td>\n" .
5226                       format_author_html('td', \%co, 15, 5) .
5227                       "<td>" .
5228                       $cgi->a({-href => href(action=>"commit", hash=>$co{'id'}),
5229                                -class => "list subject"},
5230                               chop_and_escape_str($co{'title'}, 50) . "<br/>");
5231                 my $comment = $co{'comment'};
5232                 foreach my $line (@$comment) {
5233                         if ($line =~ m/^(.*?)($search_regexp)(.*)$/i) {
5234                                 my ($lead, $match, $trail) = ($1, $2, $3);
5235                                 $match = chop_str($match, 70, 5, 'center');
5236                                 my $contextlen = int((80 - length($match))/2);
5237                                 $contextlen = 30 if ($contextlen > 30);
5238                                 $lead  = chop_str($lead,  $contextlen, 10, 'left');
5239                                 $trail = chop_str($trail, $contextlen, 10, 'right');
5240
5241                                 $lead  = esc_html($lead);
5242                                 $match = esc_html($match);
5243                                 $trail = esc_html($trail);
5244
5245                                 print "$lead<span class=\"match\">$match</span>$trail<br />";
5246                         }
5247                 }
5248                 print "</td>\n" .
5249                       "<td class=\"link\">" .
5250                       $cgi->a({-href => href(action=>"commit", hash=>$co{'id'})}, "commit") .
5251                       " | " .
5252                       $cgi->a({-href => href(action=>"commitdiff", hash=>$co{'id'})}, "commitdiff") .
5253                       " | " .
5254                       $cgi->a({-href => href(action=>"tree", hash=>$co{'tree'}, hash_base=>$co{'id'})}, "tree");
5255                 print "</td>\n" .
5256                       "</tr>\n";
5257         }
5258         if (defined $extra) {
5259                 print "<tr>\n" .
5260                       "<td colspan=\"3\">$extra</td>\n" .
5261                       "</tr>\n";
5262         }
5263         print "</table>\n";
5264 }
5265
5266 ## ======================================================================
5267 ## ======================================================================
5268 ## actions
5269
5270 sub git_project_list {
5271         my $order = $input_params{'order'};
5272         if (defined $order && $order !~ m/none|project|descr|owner|age/) {
5273                 die_error(400, "Unknown order parameter");
5274         }
5275
5276         my @list = git_get_projects_list();
5277         if (!@list) {
5278                 die_error(404, "No projects found");
5279         }
5280
5281         git_header_html();
5282         if (defined $home_text && -f $home_text) {
5283                 print "<div class=\"index_include\">\n";
5284                 insert_file($home_text);
5285                 print "</div>\n";
5286         }
5287         print $cgi->startform(-method => "get") .
5288               "<p class=\"projsearch\">Search:\n" .
5289               $cgi->textfield(-name => "s", -value => $searchtext) . "\n" .
5290               "</p>" .
5291               $cgi->end_form() . "\n";
5292         git_project_list_body(\@list, $order);
5293         git_footer_html();
5294 }
5295
5296 sub git_forks {
5297         my $order = $input_params{'order'};
5298         if (defined $order && $order !~ m/none|project|descr|owner|age/) {
5299                 die_error(400, "Unknown order parameter");
5300         }
5301
5302         my @list = git_get_projects_list($project);
5303         if (!@list) {
5304                 die_error(404, "No forks found");
5305         }
5306
5307         git_header_html();
5308         git_print_page_nav('','');
5309         git_print_header_div('summary', "$project forks");
5310         git_project_list_body(\@list, $order);
5311         git_footer_html();
5312 }
5313
5314 sub git_project_index {
5315         my @projects = git_get_projects_list($project);
5316
5317         print $cgi->header(
5318                 -type => 'text/plain',
5319                 -charset => 'utf-8',
5320                 -content_disposition => 'inline; filename="index.aux"');
5321
5322         foreach my $pr (@projects) {
5323                 if (!exists $pr->{'owner'}) {
5324                         $pr->{'owner'} = git_get_project_owner("$pr->{'path'}");
5325                 }
5326
5327                 my ($path, $owner) = ($pr->{'path'}, $pr->{'owner'});
5328                 # quote as in CGI::Util::encode, but keep the slash, and use '+' for ' '
5329                 $path  =~ s/([^a-zA-Z0-9_.\-\/ ])/sprintf("%%%02X", ord($1))/eg;
5330                 $owner =~ s/([^a-zA-Z0-9_.\-\/ ])/sprintf("%%%02X", ord($1))/eg;
5331                 $path  =~ s/ /\+/g;
5332                 $owner =~ s/ /\+/g;
5333
5334                 print "$path $owner\n";
5335         }
5336 }
5337
5338 sub git_summary {
5339         my $descr = git_get_project_description($project) || "none";
5340         my %co = parse_commit("HEAD");
5341         my %cd = %co ? parse_date($co{'committer_epoch'}, $co{'committer_tz'}) : ();
5342         my $head = $co{'id'};
5343         my $remote_heads = gitweb_check_feature('remote_heads');
5344
5345         my $owner = git_get_project_owner($project);
5346
5347         my $refs = git_get_references();
5348         # These get_*_list functions return one more to allow us to see if
5349         # there are more ...
5350         my @taglist  = git_get_tags_list(16);
5351         my @headlist = git_get_heads_list(16);
5352         my %remotedata = $remote_heads ? git_get_remotes_list() : ();
5353         my @forklist;
5354         my $check_forks = gitweb_check_feature('forks');
5355
5356         if ($check_forks) {
5357                 @forklist = git_get_projects_list($project);
5358         }
5359
5360         git_header_html();
5361         git_print_page_nav('summary','', $head);
5362
5363         print "<div class=\"title\">&nbsp;</div>\n";
5364         print "<table class=\"projects_list\">\n" .
5365               "<tr id=\"metadata_desc\"><td>description</td><td>" . esc_html($descr) . "</td></tr>\n" .
5366               "<tr id=\"metadata_owner\"><td>owner</td><td>" . esc_html($owner) . "</td></tr>\n";
5367         if (defined $cd{'rfc2822'}) {
5368                 print "<tr id=\"metadata_lchange\"><td>last change</td><td>$cd{'rfc2822'}</td></tr>\n";
5369         }
5370
5371         # use per project git URL list in $projectroot/$project/cloneurl
5372         # or make project git URL from git base URL and project name
5373         my $url_tag = "URL";
5374         my @url_list = git_get_project_url_list($project);
5375         @url_list = map { "$_/$project" } @git_base_url_list unless @url_list;
5376         foreach my $git_url (@url_list) {
5377                 next unless $git_url;
5378                 print format_repo_url($url_tag, $git_url);
5379                 $url_tag = "";
5380         }
5381
5382         # Tag cloud
5383         my $show_ctags = gitweb_check_feature('ctags');
5384         if ($show_ctags) {
5385                 my $ctags = git_get_project_ctags($project);
5386                 my $cloud = git_populate_project_tagcloud($ctags);
5387                 print "<tr id=\"metadata_ctags\"><td>Content tags:<br />";
5388                 print "</td>\n<td>" unless %$ctags;
5389                 print "<form action=\"$show_ctags\" method=\"post\"><input type=\"hidden\" name=\"p\" value=\"$project\" />Add: <input type=\"text\" name=\"t\" size=\"8\" /></form>";
5390                 print "</td>\n<td>" if %$ctags;
5391                 print git_show_project_tagcloud($cloud, 48);
5392                 print "</td></tr>";
5393         }
5394
5395         print "</table>\n";
5396
5397         # If XSS prevention is on, we don't include README.html.
5398         # TODO: Allow a readme in some safe format.
5399         if (!$prevent_xss && -s "$projectroot/$project/README.html") {
5400                 print "<div class=\"title\">readme</div>\n" .
5401                       "<div class=\"readme\">\n";
5402                 insert_file("$projectroot/$project/README.html");
5403                 print "\n</div>\n"; # class="readme"
5404         }
5405
5406         # we need to request one more than 16 (0..15) to check if
5407         # those 16 are all
5408         my @commitlist = $head ? parse_commits($head, 17) : ();
5409         if (@commitlist) {
5410                 git_print_header_div('shortlog');
5411                 git_shortlog_body(\@commitlist, 0, 15, $refs,
5412                                   $#commitlist <=  15 ? undef :
5413                                   $cgi->a({-href => href(action=>"shortlog")}, "..."));
5414         }
5415
5416         if (@taglist) {
5417                 git_print_header_div('tags');
5418                 git_tags_body(\@taglist, 0, 15,
5419                               $#taglist <=  15 ? undef :
5420                               $cgi->a({-href => href(action=>"tags")}, "..."));
5421         }
5422
5423         if (@headlist) {
5424                 git_print_header_div('heads');
5425                 git_heads_body(\@headlist, $head, 0, 15,
5426                                $#headlist <= 15 ? undef :
5427                                $cgi->a({-href => href(action=>"heads")}, "..."));
5428         }
5429
5430         if (%remotedata) {
5431                 git_print_header_div('remotes');
5432                 git_remotes_body(\%remotedata, 15, $head);
5433         }
5434
5435         if (@forklist) {
5436                 git_print_header_div('forks');
5437                 git_project_list_body(\@forklist, 'age', 0, 15,
5438                                       $#forklist <= 15 ? undef :
5439                                       $cgi->a({-href => href(action=>"forks")}, "..."),
5440                                       'no_header');
5441         }
5442
5443         git_footer_html();
5444 }
5445
5446 sub git_tag {
5447         my %tag = parse_tag($hash);
5448
5449         if (! %tag) {
5450                 die_error(404, "Unknown tag object");
5451         }
5452
5453         my $head = git_get_head_hash($project);
5454         git_header_html();
5455         git_print_page_nav('','', $head,undef,$head);
5456         git_print_header_div('commit', esc_html($tag{'name'}), $hash);
5457         print "<div class=\"title_text\">\n" .
5458               "<table class=\"object_header\">\n" .
5459               "<tr>\n" .
5460               "<td>object</td>\n" .
5461               "<td>" . $cgi->a({-class => "list", -href => href(action=>$tag{'type'}, hash=>$tag{'object'})},
5462                                $tag{'object'}) . "</td>\n" .
5463               "<td class=\"link\">" . $cgi->a({-href => href(action=>$tag{'type'}, hash=>$tag{'object'})},
5464                                               $tag{'type'}) . "</td>\n" .
5465               "</tr>\n";
5466         if (defined($tag{'author'})) {
5467                 git_print_authorship_rows(\%tag, 'author');
5468         }
5469         print "</table>\n\n" .
5470               "</div>\n";
5471         print "<div class=\"page_body\">";
5472         my $comment = $tag{'comment'};
5473         foreach my $line (@$comment) {
5474                 chomp $line;
5475                 print esc_html($line, -nbsp=>1) . "<br/>\n";
5476         }
5477         print "</div>\n";
5478         git_footer_html();
5479 }
5480
5481 sub git_blame_common {
5482         my $format = shift || 'porcelain';
5483         if ($format eq 'porcelain' && $cgi->param('js')) {
5484                 $format = 'incremental';
5485                 $action = 'blame_incremental'; # for page title etc
5486         }
5487
5488         # permissions
5489         gitweb_check_feature('blame')
5490                 or die_error(403, "Blame view not allowed");
5491
5492         # error checking
5493         die_error(400, "No file name given") unless $file_name;
5494         $hash_base ||= git_get_head_hash($project);
5495         die_error(404, "Couldn't find base commit") unless $hash_base;
5496         my %co = parse_commit($hash_base)
5497                 or die_error(404, "Commit not found");
5498         my $ftype = "blob";
5499         if (!defined $hash) {
5500                 $hash = git_get_hash_by_path($hash_base, $file_name, "blob")
5501                         or die_error(404, "Error looking up file");
5502         } else {
5503                 $ftype = git_get_type($hash);
5504                 if ($ftype !~ "blob") {
5505                         die_error(400, "Object is not a blob");
5506                 }
5507         }
5508
5509         my $fd;
5510         if ($format eq 'incremental') {
5511                 # get file contents (as base)
5512                 open $fd, "-|", git_cmd(), 'cat-file', 'blob', $hash
5513                         or die_error(500, "Open git-cat-file failed");
5514         } elsif ($format eq 'data') {
5515                 # run git-blame --incremental
5516                 open $fd, "-|", git_cmd(), "blame", "--incremental",
5517                         $hash_base, "--", $file_name
5518                         or die_error(500, "Open git-blame --incremental failed");
5519         } else {
5520                 # run git-blame --porcelain
5521                 open $fd, "-|", git_cmd(), "blame", '-p',
5522                         $hash_base, '--', $file_name
5523                         or die_error(500, "Open git-blame --porcelain failed");
5524         }
5525
5526         # incremental blame data returns early
5527         if ($format eq 'data') {
5528                 print $cgi->header(
5529                         -type=>"text/plain", -charset => "utf-8",
5530                         -status=> "200 OK");
5531                 local $| = 1; # output autoflush
5532                 print while <$fd>;
5533                 close $fd
5534                         or print "ERROR $!\n";
5535
5536                 print 'END';
5537                 if (defined $t0 && gitweb_check_feature('timed')) {
5538                         print ' '.
5539                               tv_interval($t0, [ gettimeofday() ]).
5540                               ' '.$number_of_git_cmds;
5541                 }
5542                 print "\n";
5543
5544                 return;
5545         }
5546
5547         # page header
5548         git_header_html();
5549         my $formats_nav =
5550                 $cgi->a({-href => href(action=>"blob", -replay=>1)},
5551                         "blob") .
5552                 " | ";
5553         if ($format eq 'incremental') {
5554                 $formats_nav .=
5555                         $cgi->a({-href => href(action=>"blame", javascript=>0, -replay=>1)},
5556                                 "blame") . " (non-incremental)";
5557         } else {
5558                 $formats_nav .=
5559                         $cgi->a({-href => href(action=>"blame_incremental", -replay=>1)},
5560                                 "blame") . " (incremental)";
5561         }
5562         $formats_nav .=
5563                 " | " .
5564                 $cgi->a({-href => href(action=>"history", -replay=>1)},
5565                         "history") .
5566                 " | " .
5567                 $cgi->a({-href => href(action=>$action, file_name=>$file_name)},
5568                         "HEAD");
5569         git_print_page_nav('','', $hash_base,$co{'tree'},$hash_base, $formats_nav);
5570         git_print_header_div('commit', esc_html($co{'title'}), $hash_base);
5571         git_print_page_path($file_name, $ftype, $hash_base);
5572
5573         # page body
5574         if ($format eq 'incremental') {
5575                 print "<noscript>\n<div class=\"error\"><center><b>\n".
5576                       "This page requires JavaScript to run.\n Use ".
5577                       $cgi->a({-href => href(action=>'blame',javascript=>0,-replay=>1)},
5578                               'this page').
5579                       " instead.\n".
5580                       "</b></center></div>\n</noscript>\n";
5581
5582                 print qq!<div id="progress_bar" style="width: 100%; background-color: yellow"></div>\n!;
5583         }
5584
5585         print qq!<div class="page_body">\n!;
5586         print qq!<div id="progress_info">... / ...</div>\n!
5587                 if ($format eq 'incremental');
5588         print qq!<table id="blame_table" class="blame" width="100%">\n!.
5589               #qq!<col width="5.5em" /><col width="2.5em" /><col width="*" />\n!.
5590               qq!<thead>\n!.
5591               qq!<tr><th>Commit</th><th>Line</th><th>Data</th></tr>\n!.
5592               qq!</thead>\n!.
5593               qq!<tbody>\n!;
5594
5595         my @rev_color = qw(light dark);
5596         my $num_colors = scalar(@rev_color);
5597         my $current_color = 0;
5598
5599         if ($format eq 'incremental') {
5600                 my $color_class = $rev_color[$current_color];
5601
5602                 #contents of a file
5603                 my $linenr = 0;
5604         LINE:
5605                 while (my $line = <$fd>) {
5606                         chomp $line;
5607                         $linenr++;
5608
5609                         print qq!<tr id="l$linenr" class="$color_class">!.
5610                               qq!<td class="sha1"><a href=""> </a></td>!.
5611                               qq!<td class="linenr">!.
5612                               qq!<a class="linenr" href="">$linenr</a></td>!;
5613                         print qq!<td class="pre">! . esc_html($line) . "</td>\n";
5614                         print qq!</tr>\n!;
5615                 }
5616
5617         } else { # porcelain, i.e. ordinary blame
5618                 my %metainfo = (); # saves information about commits
5619
5620                 # blame data
5621         LINE:
5622                 while (my $line = <$fd>) {
5623                         chomp $line;
5624                         # the header: <SHA-1> <src lineno> <dst lineno> [<lines in group>]
5625                         # no <lines in group> for subsequent lines in group of lines
5626                         my ($full_rev, $orig_lineno, $lineno, $group_size) =
5627                            ($line =~ /^([0-9a-f]{40}) (\d+) (\d+)(?: (\d+))?$/);
5628                         if (!exists $metainfo{$full_rev}) {
5629                                 $metainfo{$full_rev} = { 'nprevious' => 0 };
5630                         }
5631                         my $meta = $metainfo{$full_rev};
5632                         my $data;
5633                         while ($data = <$fd>) {
5634                                 chomp $data;
5635                                 last if ($data =~ s/^\t//); # contents of line
5636                                 if ($data =~ /^(\S+)(?: (.*))?$/) {
5637                                         $meta->{$1} = $2 unless exists $meta->{$1};
5638                                 }
5639                                 if ($data =~ /^previous /) {
5640                                         $meta->{'nprevious'}++;
5641                                 }
5642                         }
5643                         my $short_rev = substr($full_rev, 0, 8);
5644                         my $author = $meta->{'author'};
5645                         my %date =
5646                                 parse_date($meta->{'author-time'}, $meta->{'author-tz'});
5647                         my $date = $date{'iso-tz'};
5648                         if ($group_size) {
5649                                 $current_color = ($current_color + 1) % $num_colors;
5650                         }
5651                         my $tr_class = $rev_color[$current_color];
5652                         $tr_class .= ' boundary' if (exists $meta->{'boundary'});
5653                         $tr_class .= ' no-previous' if ($meta->{'nprevious'} == 0);
5654                         $tr_class .= ' multiple-previous' if ($meta->{'nprevious'} > 1);
5655                         print "<tr id=\"l$lineno\" class=\"$tr_class\">\n";
5656                         if ($group_size) {
5657                                 print "<td class=\"sha1\"";
5658                                 print " title=\"". esc_html($author) . ", $date\"";
5659                                 print " rowspan=\"$group_size\"" if ($group_size > 1);
5660                                 print ">";
5661                                 print $cgi->a({-href => href(action=>"commit",
5662                                                              hash=>$full_rev,
5663                                                              file_name=>$file_name)},
5664                                               esc_html($short_rev));
5665                                 if ($group_size >= 2) {
5666                                         my @author_initials = ($author =~ /\b([[:upper:]])\B/g);
5667                                         if (@author_initials) {
5668                                                 print "<br />" .
5669                                                       esc_html(join('', @author_initials));
5670                                                 #           or join('.', ...)
5671                                         }
5672                                 }
5673                                 print "</td>\n";
5674                         }
5675                         # 'previous' <sha1 of parent commit> <filename at commit>
5676                         if (exists $meta->{'previous'} &&
5677                             $meta->{'previous'} =~ /^([a-fA-F0-9]{40}) (.*)$/) {
5678                                 $meta->{'parent'} = $1;
5679                                 $meta->{'file_parent'} = unquote($2);
5680                         }
5681                         my $linenr_commit =
5682                                 exists($meta->{'parent'}) ?
5683                                 $meta->{'parent'} : $full_rev;
5684                         my $linenr_filename =
5685                                 exists($meta->{'file_parent'}) ?
5686                                 $meta->{'file_parent'} : unquote($meta->{'filename'});
5687                         my $blamed = href(action => 'blame',
5688                                           file_name => $linenr_filename,
5689                                           hash_base => $linenr_commit);
5690                         print "<td class=\"linenr\">";
5691                         print $cgi->a({ -href => "$blamed#l$orig_lineno",
5692                                         -class => "linenr" },
5693                                       esc_html($lineno));
5694                         print "</td>";
5695                         print "<td class=\"pre\">" . esc_html($data) . "</td>\n";
5696                         print "</tr>\n";
5697                 } # end while
5698
5699         }
5700
5701         # footer
5702         print "</tbody>\n".
5703               "</table>\n"; # class="blame"
5704         print "</div>\n";   # class="blame_body"
5705         close $fd
5706                 or print "Reading blob failed\n";
5707
5708         git_footer_html();
5709 }
5710
5711 sub git_blame {
5712         git_blame_common();
5713 }
5714
5715 sub git_blame_incremental {
5716         git_blame_common('incremental');
5717 }
5718
5719 sub git_blame_data {
5720         git_blame_common('data');
5721 }
5722
5723 sub git_tags {
5724         my $head = git_get_head_hash($project);
5725         git_header_html();
5726         git_print_page_nav('','', $head,undef,$head,format_ref_views('tags'));
5727         git_print_header_div('summary', $project);
5728
5729         my @tagslist = git_get_tags_list();
5730         if (@tagslist) {
5731                 git_tags_body(\@tagslist);
5732         }
5733         git_footer_html();
5734 }
5735
5736 sub git_heads {
5737         my $head = git_get_head_hash($project);
5738         git_header_html();
5739         git_print_page_nav('','', $head,undef,$head,format_ref_views('heads'));
5740         git_print_header_div('summary', $project);
5741
5742         my @headslist = git_get_heads_list();
5743         if (@headslist) {
5744                 git_heads_body(\@headslist, $head);
5745         }
5746         git_footer_html();
5747 }
5748
5749 # used both for single remote view and for list of all the remotes
5750 sub git_remotes {
5751         gitweb_check_feature('remote_heads')
5752                 or die_error(403, "Remote heads view is disabled");
5753
5754         my $head = git_get_head_hash($project);
5755         my $remote = $input_params{'hash'};
5756
5757         my $remotedata = git_get_remotes_list($remote);
5758         die_error(500, "Unable to get remote information") unless defined $remotedata;
5759
5760         unless (%$remotedata) {
5761                 die_error(404, defined $remote ?
5762                         "Remote $remote not found" :
5763                         "No remotes found");
5764         }
5765
5766         git_header_html(undef, undef, -action_extra => $remote);
5767         git_print_page_nav('', '',  $head, undef, $head,
5768                 format_ref_views($remote ? '' : 'remotes'));
5769
5770         fill_remote_heads($remotedata);
5771         if (defined $remote) {
5772                 git_print_header_div('remotes', "$remote remote for $project");
5773                 git_remote_block($remote, $remotedata->{$remote}, undef, $head);
5774         } else {
5775                 git_print_header_div('summary', "$project remotes");
5776                 git_remotes_body($remotedata, undef, $head);
5777         }
5778
5779         git_footer_html();
5780 }
5781
5782 sub git_blob_plain {
5783         my $type = shift;
5784         my $expires;
5785
5786         if (!defined $hash) {
5787                 if (defined $file_name) {
5788                         my $base = $hash_base || git_get_head_hash($project);
5789                         $hash = git_get_hash_by_path($base, $file_name, "blob")
5790                                 or die_error(404, "Cannot find file");
5791                 } else {
5792                         die_error(400, "No file name defined");
5793                 }
5794         } elsif ($hash =~ m/^[0-9a-fA-F]{40}$/) {
5795                 # blobs defined by non-textual hash id's can be cached
5796                 $expires = "+1d";
5797         }
5798
5799         open my $fd, "-|", git_cmd(), "cat-file", "blob", $hash
5800                 or die_error(500, "Open git-cat-file blob '$hash' failed");
5801
5802         # content-type (can include charset)
5803         $type = blob_contenttype($fd, $file_name, $type);
5804
5805         # "save as" filename, even when no $file_name is given
5806         my $save_as = "$hash";
5807         if (defined $file_name) {
5808                 $save_as = $file_name;
5809         } elsif ($type =~ m/^text\//) {
5810                 $save_as .= '.txt';
5811         }
5812
5813         # With XSS prevention on, blobs of all types except a few known safe
5814         # ones are served with "Content-Disposition: attachment" to make sure
5815         # they don't run in our security domain.  For certain image types,
5816         # blob view writes an <img> tag referring to blob_plain view, and we
5817         # want to be sure not to break that by serving the image as an
5818         # attachment (though Firefox 3 doesn't seem to care).
5819         my $sandbox = $prevent_xss &&
5820                 $type !~ m!^(?:text/plain|image/(?:gif|png|jpeg))$!;
5821
5822         print $cgi->header(
5823                 -type => $type,
5824                 -expires => $expires,
5825                 -content_disposition =>
5826                         ($sandbox ? 'attachment' : 'inline')
5827                         . '; filename="' . $save_as . '"');
5828         local $/ = undef;
5829         binmode STDOUT, ':raw';
5830         print <$fd>;
5831         binmode STDOUT, ':utf8'; # as set at the beginning of gitweb.cgi
5832         close $fd;
5833 }
5834
5835 sub git_blob {
5836         my $expires;
5837
5838         if (!defined $hash) {
5839                 if (defined $file_name) {
5840                         my $base = $hash_base || git_get_head_hash($project);
5841                         $hash = git_get_hash_by_path($base, $file_name, "blob")
5842                                 or die_error(404, "Cannot find file");
5843                 } else {
5844                         die_error(400, "No file name defined");
5845                 }
5846         } elsif ($hash =~ m/^[0-9a-fA-F]{40}$/) {
5847                 # blobs defined by non-textual hash id's can be cached
5848                 $expires = "+1d";
5849         }
5850
5851         my $have_blame = gitweb_check_feature('blame');
5852         open my $fd, "-|", git_cmd(), "cat-file", "blob", $hash
5853                 or die_error(500, "Couldn't cat $file_name, $hash");
5854         my $mimetype = blob_mimetype($fd, $file_name);
5855         # use 'blob_plain' (aka 'raw') view for files that cannot be displayed
5856         if ($mimetype !~ m!^(?:text/|image/(?:gif|png|jpeg)$)! && -B $fd) {
5857                 close $fd;
5858                 return git_blob_plain($mimetype);
5859         }
5860         # we can have blame only for text/* mimetype
5861         $have_blame &&= ($mimetype =~ m!^text/!);
5862
5863         my $highlight = gitweb_check_feature('highlight');
5864         my $syntax = guess_file_syntax($highlight, $mimetype, $file_name);
5865         $fd = run_highlighter($fd, $highlight, $syntax)
5866                 if $syntax;
5867
5868         git_header_html(undef, $expires);
5869         my $formats_nav = '';
5870         if (defined $hash_base && (my %co = parse_commit($hash_base))) {
5871                 if (defined $file_name) {
5872                         if ($have_blame) {
5873                                 $formats_nav .=
5874                                         $cgi->a({-href => href(action=>"blame", -replay=>1)},
5875                                                 "blame") .
5876                                         " | ";
5877                         }
5878                         $formats_nav .=
5879                                 $cgi->a({-href => href(action=>"history", -replay=>1)},
5880                                         "history") .
5881                                 " | " .
5882                                 $cgi->a({-href => href(action=>"blob_plain", -replay=>1)},
5883                                         "raw") .
5884                                 " | " .
5885                                 $cgi->a({-href => href(action=>"blob",
5886                                                        hash_base=>"HEAD", file_name=>$file_name)},
5887                                         "HEAD");
5888                 } else {
5889                         $formats_nav .=
5890                                 $cgi->a({-href => href(action=>"blob_plain", -replay=>1)},
5891                                         "raw");
5892                 }
5893                 git_print_page_nav('','', $hash_base,$co{'tree'},$hash_base, $formats_nav);
5894                 git_print_header_div('commit', esc_html($co{'title'}), $hash_base);
5895         } else {
5896                 print "<div class=\"page_nav\">\n" .
5897                       "<br/><br/></div>\n" .
5898                       "<div class=\"title\">$hash</div>\n";
5899         }
5900         git_print_page_path($file_name, "blob", $hash_base);
5901         print "<div class=\"page_body\">\n";
5902         if ($mimetype =~ m!^image/!) {
5903                 print qq!<img type="$mimetype"!;
5904                 if ($file_name) {
5905                         print qq! alt="$file_name" title="$file_name"!;
5906                 }
5907                 print qq! src="! .
5908                       href(action=>"blob_plain", hash=>$hash,
5909                            hash_base=>$hash_base, file_name=>$file_name) .
5910                       qq!" />\n!;
5911         } else {
5912                 my $nr;
5913                 while (my $line = <$fd>) {
5914                         chomp $line;
5915                         $nr++;
5916                         $line = untabify($line);
5917                         printf qq!<div class="pre"><a id="l%i" href="%s#l%i" class="linenr">%4i</a> %s</div>\n!,
5918                                $nr, href(-replay => 1), $nr, $nr, $syntax ? $line : esc_html($line, -nbsp=>1);
5919                 }
5920         }
5921         close $fd
5922                 or print "Reading blob failed.\n";
5923         print "</div>";
5924         git_footer_html();
5925 }
5926
5927 sub git_tree {
5928         if (!defined $hash_base) {
5929                 $hash_base = "HEAD";
5930         }
5931         if (!defined $hash) {
5932                 if (defined $file_name) {
5933                         $hash = git_get_hash_by_path($hash_base, $file_name, "tree");
5934                 } else {
5935                         $hash = $hash_base;
5936                 }
5937         }
5938         die_error(404, "No such tree") unless defined($hash);
5939
5940         my $show_sizes = gitweb_check_feature('show-sizes');
5941         my $have_blame = gitweb_check_feature('blame');
5942
5943         my @entries = ();
5944         {
5945                 local $/ = "\0";
5946                 open my $fd, "-|", git_cmd(), "ls-tree", '-z',
5947                         ($show_sizes ? '-l' : ()), @extra_options, $hash
5948                         or die_error(500, "Open git-ls-tree failed");
5949                 @entries = map { chomp; $_ } <$fd>;
5950                 close $fd
5951                         or die_error(404, "Reading tree failed");
5952         }
5953
5954         my $refs = git_get_references();
5955         my $ref = format_ref_marker($refs, $hash_base);
5956         git_header_html();
5957         my $basedir = '';
5958         if (defined $hash_base && (my %co = parse_commit($hash_base))) {
5959                 my @views_nav = ();
5960                 if (defined $file_name) {
5961                         push @views_nav,
5962                                 $cgi->a({-href => href(action=>"history", -replay=>1)},
5963                                         "history"),
5964                                 $cgi->a({-href => href(action=>"tree",
5965                                                        hash_base=>"HEAD", file_name=>$file_name)},
5966                                         "HEAD"),
5967                 }
5968                 my $snapshot_links = format_snapshot_links($hash);
5969                 if (defined $snapshot_links) {
5970                         # FIXME: Should be available when we have no hash base as well.
5971                         push @views_nav, $snapshot_links;
5972                 }
5973                 git_print_page_nav('tree','', $hash_base, undef, undef,
5974                                    join(' | ', @views_nav));
5975                 git_print_header_div('commit', esc_html($co{'title'}) . $ref, $hash_base);
5976         } else {
5977                 undef $hash_base;
5978                 print "<div class=\"page_nav\">\n";
5979                 print "<br/><br/></div>\n";
5980                 print "<div class=\"title\">$hash</div>\n";
5981         }
5982         if (defined $file_name) {
5983                 $basedir = $file_name;
5984                 if ($basedir ne '' && substr($basedir, -1) ne '/') {
5985                         $basedir .= '/';
5986                 }
5987                 git_print_page_path($file_name, 'tree', $hash_base);
5988         }
5989         print "<div class=\"page_body\">\n";
5990         print "<table class=\"tree\">\n";
5991         my $alternate = 1;
5992         # '..' (top directory) link if possible
5993         if (defined $hash_base &&
5994             defined $file_name && $file_name =~ m![^/]+$!) {
5995                 if ($alternate) {
5996                         print "<tr class=\"dark\">\n";
5997                 } else {
5998                         print "<tr class=\"light\">\n";
5999                 }
6000                 $alternate ^= 1;
6001
6002                 my $up = $file_name;
6003                 $up =~ s!/?[^/]+$!!;
6004                 undef $up unless $up;
6005                 # based on git_print_tree_entry
6006                 print '<td class="mode">' . mode_str('040000') . "</td>\n";
6007                 print '<td class="size">&nbsp;</td>'."\n" if $show_sizes;
6008                 print '<td class="list">';
6009                 print $cgi->a({-href => href(action=>"tree",
6010                                              hash_base=>$hash_base,
6011                                              file_name=>$up)},
6012                               "..");
6013                 print "</td>\n";
6014                 print "<td class=\"link\"></td>\n";
6015
6016                 print "</tr>\n";
6017         }
6018         foreach my $line (@entries) {
6019                 my %t = parse_ls_tree_line($line, -z => 1, -l => $show_sizes);
6020
6021                 if ($alternate) {
6022                         print "<tr class=\"dark\">\n";
6023                 } else {
6024                         print "<tr class=\"light\">\n";
6025                 }
6026                 $alternate ^= 1;
6027
6028                 git_print_tree_entry(\%t, $basedir, $hash_base, $have_blame);
6029
6030                 print "</tr>\n";
6031         }
6032         print "</table>\n" .
6033               "</div>";
6034         git_footer_html();
6035 }
6036
6037 sub snapshot_name {
6038         my ($project, $hash) = @_;
6039
6040         # path/to/project.git  -> project
6041         # path/to/project/.git -> project
6042         my $name = to_utf8($project);
6043         $name =~ s,([^/])/*\.git$,$1,;
6044         $name = basename($name);
6045         # sanitize name
6046         $name =~ s/[[:cntrl:]]/?/g;
6047
6048         my $ver = $hash;
6049         if ($hash =~ /^[0-9a-fA-F]+$/) {
6050                 # shorten SHA-1 hash
6051                 my $full_hash = git_get_full_hash($project, $hash);
6052                 if ($full_hash =~ /^$hash/ && length($hash) > 7) {
6053                         $ver = git_get_short_hash($project, $hash);
6054                 }
6055         } elsif ($hash =~ m!^refs/tags/(.*)$!) {
6056                 # tags don't need shortened SHA-1 hash
6057                 $ver = $1;
6058         } else {
6059                 # branches and other need shortened SHA-1 hash
6060                 if ($hash =~ m!^refs/(?:heads|remotes)/(.*)$!) {
6061                         $ver = $1;
6062                 }
6063                 $ver .= '-' . git_get_short_hash($project, $hash);
6064         }
6065         # in case of hierarchical branch names
6066         $ver =~ s!/!.!g;
6067
6068         # name = project-version_string
6069         $name = "$name-$ver";
6070
6071         return wantarray ? ($name, $name) : $name;
6072 }
6073
6074 sub git_snapshot {
6075         my $format = $input_params{'snapshot_format'};
6076         if (!@snapshot_fmts) {
6077                 die_error(403, "Snapshots not allowed");
6078         }
6079         # default to first supported snapshot format
6080         $format ||= $snapshot_fmts[0];
6081         if ($format !~ m/^[a-z0-9]+$/) {
6082                 die_error(400, "Invalid snapshot format parameter");
6083         } elsif (!exists($known_snapshot_formats{$format})) {
6084                 die_error(400, "Unknown snapshot format");
6085         } elsif ($known_snapshot_formats{$format}{'disabled'}) {
6086                 die_error(403, "Snapshot format not allowed");
6087         } elsif (!grep($_ eq $format, @snapshot_fmts)) {
6088                 die_error(403, "Unsupported snapshot format");
6089         }
6090
6091         my $type = git_get_type("$hash^{}");
6092         if (!$type) {
6093                 die_error(404, 'Object does not exist');
6094         }  elsif ($type eq 'blob') {
6095                 die_error(400, 'Object is not a tree-ish');
6096         }
6097
6098         my ($name, $prefix) = snapshot_name($project, $hash);
6099         my $filename = "$name$known_snapshot_formats{$format}{'suffix'}";
6100         my $cmd = quote_command(
6101                 git_cmd(), 'archive',
6102                 "--format=$known_snapshot_formats{$format}{'format'}",
6103                 "--prefix=$prefix/", $hash);
6104         if (exists $known_snapshot_formats{$format}{'compressor'}) {
6105                 $cmd .= ' | ' . quote_command(@{$known_snapshot_formats{$format}{'compressor'}});
6106         }
6107
6108         $filename =~ s/(["\\])/\\$1/g;
6109         print $cgi->header(
6110                 -type => $known_snapshot_formats{$format}{'type'},
6111                 -content_disposition => 'inline; filename="' . $filename . '"',
6112                 -status => '200 OK');
6113
6114         open my $fd, "-|", $cmd
6115                 or die_error(500, "Execute git-archive failed");
6116         binmode STDOUT, ':raw';
6117         print <$fd>;
6118         binmode STDOUT, ':utf8'; # as set at the beginning of gitweb.cgi
6119         close $fd;
6120 }
6121
6122 sub git_log_generic {
6123         my ($fmt_name, $body_subr, $base, $parent, $file_name, $file_hash) = @_;
6124
6125         my $head = git_get_head_hash($project);
6126         if (!defined $base) {
6127                 $base = $head;
6128         }
6129         if (!defined $page) {
6130                 $page = 0;
6131         }
6132         my $refs = git_get_references();
6133
6134         my $commit_hash = $base;
6135         if (defined $parent) {
6136                 $commit_hash = "$parent..$base";
6137         }
6138         my @commitlist =
6139                 parse_commits($commit_hash, 101, (100 * $page),
6140                               defined $file_name ? ($file_name, "--full-history") : ());
6141
6142         my $ftype;
6143         if (!defined $file_hash && defined $file_name) {
6144                 # some commits could have deleted file in question,
6145                 # and not have it in tree, but one of them has to have it
6146                 for (my $i = 0; $i < @commitlist; $i++) {
6147                         $file_hash = git_get_hash_by_path($commitlist[$i]{'id'}, $file_name);
6148                         last if defined $file_hash;
6149                 }
6150         }
6151         if (defined $file_hash) {
6152                 $ftype = git_get_type($file_hash);
6153         }
6154         if (defined $file_name && !defined $ftype) {
6155                 die_error(500, "Unknown type of object");
6156         }
6157         my %co;
6158         if (defined $file_name) {
6159                 %co = parse_commit($base)
6160                         or die_error(404, "Unknown commit object");
6161         }
6162
6163
6164         my $paging_nav = format_paging_nav($fmt_name, $page, $#commitlist >= 100);
6165         my $next_link = '';
6166         if ($#commitlist >= 100) {
6167                 $next_link =
6168                         $cgi->a({-href => href(-replay=>1, page=>$page+1),
6169                                  -accesskey => "n", -title => "Alt-n"}, "next");
6170         }
6171         my $patch_max = gitweb_get_feature('patches');
6172         if ($patch_max && !defined $file_name) {
6173                 if ($patch_max < 0 || @commitlist <= $patch_max) {
6174                         $paging_nav .= " &sdot; " .
6175                                 $cgi->a({-href => href(action=>"patches", -replay=>1)},
6176                                         "patches");
6177                 }
6178         }
6179
6180         git_header_html();
6181         git_print_page_nav($fmt_name,'', $hash,$hash,$hash, $paging_nav);
6182         if (defined $file_name) {
6183                 git_print_header_div('commit', esc_html($co{'title'}), $base);
6184         } else {
6185                 git_print_header_div('summary', $project)
6186         }
6187         git_print_page_path($file_name, $ftype, $hash_base)
6188                 if (defined $file_name);
6189
6190         $body_subr->(\@commitlist, 0, 99, $refs, $next_link,
6191                      $file_name, $file_hash, $ftype);
6192
6193         git_footer_html();
6194 }
6195
6196 sub git_log {
6197         git_log_generic('log', \&git_log_body,
6198                         $hash, $hash_parent);
6199 }
6200
6201 sub git_commit {
6202         $hash ||= $hash_base || "HEAD";
6203         my %co = parse_commit($hash)
6204             or die_error(404, "Unknown commit object");
6205
6206         my $parent  = $co{'parent'};
6207         my $parents = $co{'parents'}; # listref
6208
6209         # we need to prepare $formats_nav before any parameter munging
6210         my $formats_nav;
6211         if (!defined $parent) {
6212                 # --root commitdiff
6213                 $formats_nav .= '(initial)';
6214         } elsif (@$parents == 1) {
6215                 # single parent commit
6216                 $formats_nav .=
6217                         '(parent: ' .
6218                         $cgi->a({-href => href(action=>"commit",
6219                                                hash=>$parent)},
6220                                 esc_html(substr($parent, 0, 7))) .
6221                         ')';
6222         } else {
6223                 # merge commit
6224                 $formats_nav .=
6225                         '(merge: ' .
6226                         join(' ', map {
6227                                 $cgi->a({-href => href(action=>"commit",
6228                                                        hash=>$_)},
6229                                         esc_html(substr($_, 0, 7)));
6230                         } @$parents ) .
6231                         ')';
6232         }
6233         if (gitweb_check_feature('patches') && @$parents <= 1) {
6234                 $formats_nav .= " | " .
6235                         $cgi->a({-href => href(action=>"patch", -replay=>1)},
6236                                 "patch");
6237         }
6238
6239         if (!defined $parent) {
6240                 $parent = "--root";
6241         }
6242         my @difftree;
6243         open my $fd, "-|", git_cmd(), "diff-tree", '-r', "--no-commit-id",
6244                 @diff_opts,
6245                 (@$parents <= 1 ? $parent : '-c'),
6246                 $hash, "--"
6247                 or die_error(500, "Open git-diff-tree failed");
6248         @difftree = map { chomp; $_ } <$fd>;
6249         close $fd or die_error(404, "Reading git-diff-tree failed");
6250
6251         # non-textual hash id's can be cached
6252         my $expires;
6253         if ($hash =~ m/^[0-9a-fA-F]{40}$/) {
6254                 $expires = "+1d";
6255         }
6256         my $refs = git_get_references();
6257         my $ref = format_ref_marker($refs, $co{'id'});
6258
6259         git_header_html(undef, $expires);
6260         git_print_page_nav('commit', '',
6261                            $hash, $co{'tree'}, $hash,
6262                            $formats_nav);
6263
6264         if (defined $co{'parent'}) {
6265                 git_print_header_div('commitdiff', esc_html($co{'title'}) . $ref, $hash);
6266         } else {
6267                 git_print_header_div('tree', esc_html($co{'title'}) . $ref, $co{'tree'}, $hash);
6268         }
6269         print "<div class=\"title_text\">\n" .
6270               "<table class=\"object_header\">\n";
6271         git_print_authorship_rows(\%co);
6272         print "<tr><td>commit</td><td class=\"sha1\">$co{'id'}</td></tr>\n";
6273         print "<tr>" .
6274               "<td>tree</td>" .
6275               "<td class=\"sha1\">" .
6276               $cgi->a({-href => href(action=>"tree", hash=>$co{'tree'}, hash_base=>$hash),
6277                        class => "list"}, $co{'tree'}) .
6278               "</td>" .
6279               "<td class=\"link\">" .
6280               $cgi->a({-href => href(action=>"tree", hash=>$co{'tree'}, hash_base=>$hash)},
6281                       "tree");
6282         my $snapshot_links = format_snapshot_links($hash);
6283         if (defined $snapshot_links) {
6284                 print " | " . $snapshot_links;
6285         }
6286         print "</td>" .
6287               "</tr>\n";
6288
6289         foreach my $par (@$parents) {
6290                 print "<tr>" .
6291                       "<td>parent</td>" .
6292                       "<td class=\"sha1\">" .
6293                       $cgi->a({-href => href(action=>"commit", hash=>$par),
6294                                class => "list"}, $par) .
6295                       "</td>" .
6296                       "<td class=\"link\">" .
6297                       $cgi->a({-href => href(action=>"commit", hash=>$par)}, "commit") .
6298                       " | " .
6299                       $cgi->a({-href => href(action=>"commitdiff", hash=>$hash, hash_parent=>$par)}, "diff") .
6300                       "</td>" .
6301                       "</tr>\n";
6302         }
6303         print "</table>".
6304               "</div>\n";
6305
6306         print "<div class=\"page_body\">\n";
6307         git_print_log($co{'comment'});
6308         print "</div>\n";
6309
6310         git_difftree_body(\@difftree, $hash, @$parents);
6311
6312         git_footer_html();
6313 }
6314
6315 sub git_object {
6316         # object is defined by:
6317         # - hash or hash_base alone
6318         # - hash_base and file_name
6319         my $type;
6320
6321         # - hash or hash_base alone
6322         if ($hash || ($hash_base && !defined $file_name)) {
6323                 my $object_id = $hash || $hash_base;
6324
6325                 open my $fd, "-|", quote_command(
6326                         git_cmd(), 'cat-file', '-t', $object_id) . ' 2> /dev/null'
6327                         or die_error(404, "Object does not exist");
6328                 $type = <$fd>;
6329                 chomp $type;
6330                 close $fd
6331                         or die_error(404, "Object does not exist");
6332
6333         # - hash_base and file_name
6334         } elsif ($hash_base && defined $file_name) {
6335                 $file_name =~ s,/+$,,;
6336
6337                 system(git_cmd(), "cat-file", '-e', $hash_base) == 0
6338                         or die_error(404, "Base object does not exist");
6339
6340                 # here errors should not hapen
6341                 open my $fd, "-|", git_cmd(), "ls-tree", $hash_base, "--", $file_name
6342                         or die_error(500, "Open git-ls-tree failed");
6343                 my $line = <$fd>;
6344                 close $fd;
6345
6346                 #'100644 blob 0fa3f3a66fb6a137f6ec2c19351ed4d807070ffa  panic.c'
6347                 unless ($line && $line =~ m/^([0-9]+) (.+) ([0-9a-fA-F]{40})\t/) {
6348                         die_error(404, "File or directory for given base does not exist");
6349                 }
6350                 $type = $2;
6351                 $hash = $3;
6352         } else {
6353                 die_error(400, "Not enough information to find object");
6354         }
6355
6356         print $cgi->redirect(-uri => href(action=>$type, -full=>1,
6357                                           hash=>$hash, hash_base=>$hash_base,
6358                                           file_name=>$file_name),
6359                              -status => '302 Found');
6360 }
6361
6362 sub git_blobdiff {
6363         my $format = shift || 'html';
6364
6365         my $fd;
6366         my @difftree;
6367         my %diffinfo;
6368         my $expires;
6369
6370         # preparing $fd and %diffinfo for git_patchset_body
6371         # new style URI
6372         if (defined $hash_base && defined $hash_parent_base) {
6373                 if (defined $file_name) {
6374                         # read raw output
6375                         open $fd, "-|", git_cmd(), "diff-tree", '-r', @diff_opts,
6376                                 $hash_parent_base, $hash_base,
6377                                 "--", (defined $file_parent ? $file_parent : ()), $file_name
6378                                 or die_error(500, "Open git-diff-tree failed");
6379                         @difftree = map { chomp; $_ } <$fd>;
6380                         close $fd
6381                                 or die_error(404, "Reading git-diff-tree failed");
6382                         @difftree
6383                                 or die_error(404, "Blob diff not found");
6384
6385                 } elsif (defined $hash &&
6386                          $hash =~ /[0-9a-fA-F]{40}/) {
6387                         # try to find filename from $hash
6388
6389                         # read filtered raw output
6390                         open $fd, "-|", git_cmd(), "diff-tree", '-r', @diff_opts,
6391                                 $hash_parent_base, $hash_base, "--"
6392                                 or die_error(500, "Open git-diff-tree failed");
6393                         @difftree =
6394                                 # ':100644 100644 03b21826... 3b93d5e7... M     ls-files.c'
6395                                 # $hash == to_id
6396                                 grep { /^:[0-7]{6} [0-7]{6} [0-9a-fA-F]{40} $hash/ }
6397                                 map { chomp; $_ } <$fd>;
6398                         close $fd
6399                                 or die_error(404, "Reading git-diff-tree failed");
6400                         @difftree
6401                                 or die_error(404, "Blob diff not found");
6402
6403                 } else {
6404                         die_error(400, "Missing one of the blob diff parameters");
6405                 }
6406
6407                 if (@difftree > 1) {
6408                         die_error(400, "Ambiguous blob diff specification");
6409                 }
6410
6411                 %diffinfo = parse_difftree_raw_line($difftree[0]);
6412                 $file_parent ||= $diffinfo{'from_file'} || $file_name;
6413                 $file_name   ||= $diffinfo{'to_file'};
6414
6415                 $hash_parent ||= $diffinfo{'from_id'};
6416                 $hash        ||= $diffinfo{'to_id'};
6417
6418                 # non-textual hash id's can be cached
6419                 if ($hash_base =~ m/^[0-9a-fA-F]{40}$/ &&
6420                     $hash_parent_base =~ m/^[0-9a-fA-F]{40}$/) {
6421                         $expires = '+1d';
6422                 }
6423
6424                 # open patch output
6425                 open $fd, "-|", git_cmd(), "diff-tree", '-r', @diff_opts,
6426                         '-p', ($format eq 'html' ? "--full-index" : ()),
6427                         $hash_parent_base, $hash_base,
6428                         "--", (defined $file_parent ? $file_parent : ()), $file_name
6429                         or die_error(500, "Open git-diff-tree failed");
6430         }
6431
6432         # old/legacy style URI -- not generated anymore since 1.4.3.
6433         if (!%diffinfo) {
6434                 die_error('404 Not Found', "Missing one of the blob diff parameters")
6435         }
6436
6437         # header
6438         if ($format eq 'html') {
6439                 my $formats_nav =
6440                         $cgi->a({-href => href(action=>"blobdiff_plain", -replay=>1)},
6441                                 "raw");
6442                 git_header_html(undef, $expires);
6443                 if (defined $hash_base && (my %co = parse_commit($hash_base))) {
6444                         git_print_page_nav('','', $hash_base,$co{'tree'},$hash_base, $formats_nav);
6445                         git_print_header_div('commit', esc_html($co{'title'}), $hash_base);
6446                 } else {
6447                         print "<div class=\"page_nav\"><br/>$formats_nav<br/></div>\n";
6448                         print "<div class=\"title\">$hash vs $hash_parent</div>\n";
6449                 }
6450                 if (defined $file_name) {
6451                         git_print_page_path($file_name, "blob", $hash_base);
6452                 } else {
6453                         print "<div class=\"page_path\"></div>\n";
6454                 }
6455
6456         } elsif ($format eq 'plain') {
6457                 print $cgi->header(
6458                         -type => 'text/plain',
6459                         -charset => 'utf-8',
6460                         -expires => $expires,
6461                         -content_disposition => 'inline; filename="' . "$file_name" . '.patch"');
6462
6463                 print "X-Git-Url: " . $cgi->self_url() . "\n\n";
6464
6465         } else {
6466                 die_error(400, "Unknown blobdiff format");
6467         }
6468
6469         # patch
6470         if ($format eq 'html') {
6471                 print "<div class=\"page_body\">\n";
6472
6473                 git_patchset_body($fd, [ \%diffinfo ], $hash_base, $hash_parent_base);
6474                 close $fd;
6475
6476                 print "</div>\n"; # class="page_body"
6477                 git_footer_html();
6478
6479         } else {
6480                 while (my $line = <$fd>) {
6481                         $line =~ s!a/($hash|$hash_parent)!'a/'.esc_path($diffinfo{'from_file'})!eg;
6482                         $line =~ s!b/($hash|$hash_parent)!'b/'.esc_path($diffinfo{'to_file'})!eg;
6483
6484                         print $line;
6485
6486                         last if $line =~ m!^\+\+\+!;
6487                 }
6488                 local $/ = undef;
6489                 print <$fd>;
6490                 close $fd;
6491         }
6492 }
6493
6494 sub git_blobdiff_plain {
6495         git_blobdiff('plain');
6496 }
6497
6498 sub git_commitdiff {
6499         my %params = @_;
6500         my $format = $params{-format} || 'html';
6501
6502         my ($patch_max) = gitweb_get_feature('patches');
6503         if ($format eq 'patch') {
6504                 die_error(403, "Patch view not allowed") unless $patch_max;
6505         }
6506
6507         $hash ||= $hash_base || "HEAD";
6508         my %co = parse_commit($hash)
6509             or die_error(404, "Unknown commit object");
6510
6511         # choose format for commitdiff for merge
6512         if (! defined $hash_parent && @{$co{'parents'}} > 1) {
6513                 $hash_parent = '--cc';
6514         }
6515         # we need to prepare $formats_nav before almost any parameter munging
6516         my $formats_nav;
6517         if ($format eq 'html') {
6518                 $formats_nav =
6519                         $cgi->a({-href => href(action=>"commitdiff_plain", -replay=>1)},
6520                                 "raw");
6521                 if ($patch_max && @{$co{'parents'}} <= 1) {
6522                         $formats_nav .= " | " .
6523                                 $cgi->a({-href => href(action=>"patch", -replay=>1)},
6524                                         "patch");
6525                 }
6526
6527                 if (defined $hash_parent &&
6528                     $hash_parent ne '-c' && $hash_parent ne '--cc') {
6529                         # commitdiff with two commits given
6530                         my $hash_parent_short = $hash_parent;
6531                         if ($hash_parent =~ m/^[0-9a-fA-F]{40}$/) {
6532                                 $hash_parent_short = substr($hash_parent, 0, 7);
6533                         }
6534                         $formats_nav .=
6535                                 ' (from';
6536                         for (my $i = 0; $i < @{$co{'parents'}}; $i++) {
6537                                 if ($co{'parents'}[$i] eq $hash_parent) {
6538                                         $formats_nav .= ' parent ' . ($i+1);
6539                                         last;
6540                                 }
6541                         }
6542                         $formats_nav .= ': ' .
6543                                 $cgi->a({-href => href(action=>"commitdiff",
6544                                                        hash=>$hash_parent)},
6545                                         esc_html($hash_parent_short)) .
6546                                 ')';
6547                 } elsif (!$co{'parent'}) {
6548                         # --root commitdiff
6549                         $formats_nav .= ' (initial)';
6550                 } elsif (scalar @{$co{'parents'}} == 1) {
6551                         # single parent commit
6552                         $formats_nav .=
6553                                 ' (parent: ' .
6554                                 $cgi->a({-href => href(action=>"commitdiff",
6555                                                        hash=>$co{'parent'})},
6556                                         esc_html(substr($co{'parent'}, 0, 7))) .
6557                                 ')';
6558                 } else {
6559                         # merge commit
6560                         if ($hash_parent eq '--cc') {
6561                                 $formats_nav .= ' | ' .
6562                                         $cgi->a({-href => href(action=>"commitdiff",
6563                                                                hash=>$hash, hash_parent=>'-c')},
6564                                                 'combined');
6565                         } else { # $hash_parent eq '-c'
6566                                 $formats_nav .= ' | ' .
6567                                         $cgi->a({-href => href(action=>"commitdiff",
6568                                                                hash=>$hash, hash_parent=>'--cc')},
6569                                                 'compact');
6570                         }
6571                         $formats_nav .=
6572                                 ' (merge: ' .
6573                                 join(' ', map {
6574                                         $cgi->a({-href => href(action=>"commitdiff",
6575                                                                hash=>$_)},
6576                                                 esc_html(substr($_, 0, 7)));
6577                                 } @{$co{'parents'}} ) .
6578                                 ')';
6579                 }
6580         }
6581
6582         my $hash_parent_param = $hash_parent;
6583         if (!defined $hash_parent_param) {
6584                 # --cc for multiple parents, --root for parentless
6585                 $hash_parent_param =
6586                         @{$co{'parents'}} > 1 ? '--cc' : $co{'parent'} || '--root';
6587         }
6588
6589         # read commitdiff
6590         my $fd;
6591         my @difftree;
6592         if ($format eq 'html') {
6593                 open $fd, "-|", git_cmd(), "diff-tree", '-r', @diff_opts,
6594                         "--no-commit-id", "--patch-with-raw", "--full-index",
6595                         $hash_parent_param, $hash, "--"
6596                         or die_error(500, "Open git-diff-tree failed");
6597
6598                 while (my $line = <$fd>) {
6599                         chomp $line;
6600                         # empty line ends raw part of diff-tree output
6601                         last unless $line;
6602                         push @difftree, scalar parse_difftree_raw_line($line);
6603                 }
6604
6605         } elsif ($format eq 'plain') {
6606                 open $fd, "-|", git_cmd(), "diff-tree", '-r', @diff_opts,
6607                         '-p', $hash_parent_param, $hash, "--"
6608                         or die_error(500, "Open git-diff-tree failed");
6609         } elsif ($format eq 'patch') {
6610                 # For commit ranges, we limit the output to the number of
6611                 # patches specified in the 'patches' feature.
6612                 # For single commits, we limit the output to a single patch,
6613                 # diverging from the git-format-patch default.
6614                 my @commit_spec = ();
6615                 if ($hash_parent) {
6616                         if ($patch_max > 0) {
6617                                 push @commit_spec, "-$patch_max";
6618                         }
6619                         push @commit_spec, '-n', "$hash_parent..$hash";
6620                 } else {
6621                         if ($params{-single}) {
6622                                 push @commit_spec, '-1';
6623                         } else {
6624                                 if ($patch_max > 0) {
6625                                         push @commit_spec, "-$patch_max";
6626                                 }
6627                                 push @commit_spec, "-n";
6628                         }
6629                         push @commit_spec, '--root', $hash;
6630                 }
6631                 open $fd, "-|", git_cmd(), "format-patch", @diff_opts,
6632                         '--encoding=utf8', '--stdout', @commit_spec
6633                         or die_error(500, "Open git-format-patch failed");
6634         } else {
6635                 die_error(400, "Unknown commitdiff format");
6636         }
6637
6638         # non-textual hash id's can be cached
6639         my $expires;
6640         if ($hash =~ m/^[0-9a-fA-F]{40}$/) {
6641                 $expires = "+1d";
6642         }
6643
6644         # write commit message
6645         if ($format eq 'html') {
6646                 my $refs = git_get_references();
6647                 my $ref = format_ref_marker($refs, $co{'id'});
6648
6649                 git_header_html(undef, $expires);
6650                 git_print_page_nav('commitdiff','', $hash,$co{'tree'},$hash, $formats_nav);
6651                 git_print_header_div('commit', esc_html($co{'title'}) . $ref, $hash);
6652                 print "<div class=\"title_text\">\n" .
6653                       "<table class=\"object_header\">\n";
6654                 git_print_authorship_rows(\%co);
6655                 print "</table>".
6656                       "</div>\n";
6657                 print "<div class=\"page_body\">\n";
6658                 if (@{$co{'comment'}} > 1) {
6659                         print "<div class=\"log\">\n";
6660                         git_print_log($co{'comment'}, -final_empty_line=> 1, -remove_title => 1);
6661                         print "</div>\n"; # class="log"
6662                 }
6663
6664         } elsif ($format eq 'plain') {
6665                 my $refs = git_get_references("tags");
6666                 my $tagname = git_get_rev_name_tags($hash);
6667                 my $filename = basename($project) . "-$hash.patch";
6668
6669                 print $cgi->header(
6670                         -type => 'text/plain',
6671                         -charset => 'utf-8',
6672                         -expires => $expires,
6673                         -content_disposition => 'inline; filename="' . "$filename" . '"');
6674                 my %ad = parse_date($co{'author_epoch'}, $co{'author_tz'});
6675                 print "From: " . to_utf8($co{'author'}) . "\n";
6676                 print "Date: $ad{'rfc2822'} ($ad{'tz_local'})\n";
6677                 print "Subject: " . to_utf8($co{'title'}) . "\n";
6678
6679                 print "X-Git-Tag: $tagname\n" if $tagname;
6680                 print "X-Git-Url: " . $cgi->self_url() . "\n\n";
6681
6682                 foreach my $line (@{$co{'comment'}}) {
6683                         print to_utf8($line) . "\n";
6684                 }
6685                 print "---\n\n";
6686         } elsif ($format eq 'patch') {
6687                 my $filename = basename($project) . "-$hash.patch";
6688
6689                 print $cgi->header(
6690                         -type => 'text/plain',
6691                         -charset => 'utf-8',
6692                         -expires => $expires,
6693                         -content_disposition => 'inline; filename="' . "$filename" . '"');
6694         }
6695
6696         # write patch
6697         if ($format eq 'html') {
6698                 my $use_parents = !defined $hash_parent ||
6699                         $hash_parent eq '-c' || $hash_parent eq '--cc';
6700                 git_difftree_body(\@difftree, $hash,
6701                                   $use_parents ? @{$co{'parents'}} : $hash_parent);
6702                 print "<br/>\n";
6703
6704                 git_patchset_body($fd, \@difftree, $hash,
6705                                   $use_parents ? @{$co{'parents'}} : $hash_parent);
6706                 close $fd;
6707                 print "</div>\n"; # class="page_body"
6708                 git_footer_html();
6709
6710         } elsif ($format eq 'plain') {
6711                 local $/ = undef;
6712                 print <$fd>;
6713                 close $fd
6714                         or print "Reading git-diff-tree failed\n";
6715         } elsif ($format eq 'patch') {
6716                 local $/ = undef;
6717                 print <$fd>;
6718                 close $fd
6719                         or print "Reading git-format-patch failed\n";
6720         }
6721 }
6722
6723 sub git_commitdiff_plain {
6724         git_commitdiff(-format => 'plain');
6725 }
6726
6727 # format-patch-style patches
6728 sub git_patch {
6729         git_commitdiff(-format => 'patch', -single => 1);
6730 }
6731
6732 sub git_patches {
6733         git_commitdiff(-format => 'patch');
6734 }
6735
6736 sub git_history {
6737         git_log_generic('history', \&git_history_body,
6738                         $hash_base, $hash_parent_base,
6739                         $file_name, $hash);
6740 }
6741
6742 sub git_search {
6743         gitweb_check_feature('search') or die_error(403, "Search is disabled");
6744         if (!defined $searchtext) {
6745                 die_error(400, "Text field is empty");
6746         }
6747         if (!defined $hash) {
6748                 $hash = git_get_head_hash($project);
6749         }
6750         my %co = parse_commit($hash);
6751         if (!%co) {
6752                 die_error(404, "Unknown commit object");
6753         }
6754         if (!defined $page) {
6755                 $page = 0;
6756         }
6757
6758         $searchtype ||= 'commit';
6759         if ($searchtype eq 'pickaxe') {
6760                 # pickaxe may take all resources of your box and run for several minutes
6761                 # with every query - so decide by yourself how public you make this feature
6762                 gitweb_check_feature('pickaxe')
6763                     or die_error(403, "Pickaxe is disabled");
6764         }
6765         if ($searchtype eq 'grep') {
6766                 gitweb_check_feature('grep')[0]
6767                     or die_error(403, "Grep is disabled");
6768         }
6769
6770         git_header_html();
6771
6772         if ($searchtype eq 'commit' or $searchtype eq 'author' or $searchtype eq 'committer') {
6773                 my $greptype;
6774                 if ($searchtype eq 'commit') {
6775                         $greptype = "--grep=";
6776                 } elsif ($searchtype eq 'author') {
6777                         $greptype = "--author=";
6778                 } elsif ($searchtype eq 'committer') {
6779                         $greptype = "--committer=";
6780                 }
6781                 $greptype .= $searchtext;
6782                 my @commitlist = parse_commits($hash, 101, (100 * $page), undef,
6783                                                $greptype, '--regexp-ignore-case',
6784                                                $search_use_regexp ? '--extended-regexp' : '--fixed-strings');
6785
6786                 my $paging_nav = '';
6787                 if ($page > 0) {
6788                         $paging_nav .=
6789                                 $cgi->a({-href => href(action=>"search", hash=>$hash,
6790                                                        searchtext=>$searchtext,
6791                                                        searchtype=>$searchtype)},
6792                                         "first");
6793                         $paging_nav .= " &sdot; " .
6794                                 $cgi->a({-href => href(-replay=>1, page=>$page-1),
6795                                          -accesskey => "p", -title => "Alt-p"}, "prev");
6796                 } else {
6797                         $paging_nav .= "first";
6798                         $paging_nav .= " &sdot; prev";
6799                 }
6800                 my $next_link = '';
6801                 if ($#commitlist >= 100) {
6802                         $next_link =
6803                                 $cgi->a({-href => href(-replay=>1, page=>$page+1),
6804                                          -accesskey => "n", -title => "Alt-n"}, "next");
6805                         $paging_nav .= " &sdot; $next_link";
6806                 } else {
6807                         $paging_nav .= " &sdot; next";
6808                 }
6809
6810                 git_print_page_nav('','', $hash,$co{'tree'},$hash, $paging_nav);
6811                 git_print_header_div('commit', esc_html($co{'title'}), $hash);
6812                 if ($page == 0 && !@commitlist) {
6813                         print "<p>No match.</p>\n";
6814                 } else {
6815                         git_search_grep_body(\@commitlist, 0, 99, $next_link);
6816                 }
6817         }
6818
6819         if ($searchtype eq 'pickaxe') {
6820                 git_print_page_nav('','', $hash,$co{'tree'},$hash);
6821                 git_print_header_div('commit', esc_html($co{'title'}), $hash);
6822
6823                 print "<table class=\"pickaxe search\">\n";
6824                 my $alternate = 1;
6825                 local $/ = "\n";
6826                 open my $fd, '-|', git_cmd(), '--no-pager', 'log', @diff_opts,
6827                         '--pretty=format:%H', '--no-abbrev', '--raw', "-S$searchtext",
6828                         ($search_use_regexp ? '--pickaxe-regex' : ());
6829                 undef %co;
6830                 my @files;
6831                 while (my $line = <$fd>) {
6832                         chomp $line;
6833                         next unless $line;
6834
6835                         my %set = parse_difftree_raw_line($line);
6836                         if (defined $set{'commit'}) {
6837                                 # finish previous commit
6838                                 if (%co) {
6839                                         print "</td>\n" .
6840                                               "<td class=\"link\">" .
6841                                               $cgi->a({-href => href(action=>"commit", hash=>$co{'id'})}, "commit") .
6842                                               " | " .
6843                                               $cgi->a({-href => href(action=>"tree", hash=>$co{'tree'}, hash_base=>$co{'id'})}, "tree");
6844                                         print "</td>\n" .
6845                                               "</tr>\n";
6846                                 }
6847
6848                                 if ($alternate) {
6849                                         print "<tr class=\"dark\">\n";
6850                                 } else {
6851                                         print "<tr class=\"light\">\n";
6852                                 }
6853                                 $alternate ^= 1;
6854                                 %co = parse_commit($set{'commit'});
6855                                 my $author = chop_and_escape_str($co{'author_name'}, 15, 5);
6856                                 print "<td title=\"$co{'age_string_age'}\"><i>$co{'age_string_date'}</i></td>\n" .
6857                                       "<td><i>$author</i></td>\n" .
6858                                       "<td>" .
6859                                       $cgi->a({-href => href(action=>"commit", hash=>$co{'id'}),
6860                                               -class => "list subject"},
6861                                               chop_and_escape_str($co{'title'}, 50) . "<br/>");
6862                         } elsif (defined $set{'to_id'}) {
6863                                 next if ($set{'to_id'} =~ m/^0{40}$/);
6864
6865                                 print $cgi->a({-href => href(action=>"blob", hash_base=>$co{'id'},
6866                                                              hash=>$set{'to_id'}, file_name=>$set{'to_file'}),
6867                                               -class => "list"},
6868                                               "<span class=\"match\">" . esc_path($set{'file'}) . "</span>") .
6869                                       "<br/>\n";
6870                         }
6871                 }
6872                 close $fd;
6873
6874                 # finish last commit (warning: repetition!)
6875                 if (%co) {
6876                         print "</td>\n" .
6877                               "<td class=\"link\">" .
6878                               $cgi->a({-href => href(action=>"commit", hash=>$co{'id'})}, "commit") .
6879                               " | " .
6880                               $cgi->a({-href => href(action=>"tree", hash=>$co{'tree'}, hash_base=>$co{'id'})}, "tree");
6881                         print "</td>\n" .
6882                               "</tr>\n";
6883                 }
6884
6885                 print "</table>\n";
6886         }
6887
6888         if ($searchtype eq 'grep') {
6889                 git_print_page_nav('','', $hash,$co{'tree'},$hash);
6890                 git_print_header_div('commit', esc_html($co{'title'}), $hash);
6891
6892                 print "<table class=\"grep_search\">\n";
6893                 my $alternate = 1;
6894                 my $matches = 0;
6895                 local $/ = "\n";
6896                 open my $fd, "-|", git_cmd(), 'grep', '-n',
6897                         $search_use_regexp ? ('-E', '-i') : '-F',
6898                         $searchtext, $co{'tree'};
6899                 my $lastfile = '';
6900                 while (my $line = <$fd>) {
6901                         chomp $line;
6902                         my ($file, $lno, $ltext, $binary);
6903                         last if ($matches++ > 1000);
6904                         if ($line =~ /^Binary file (.+) matches$/) {
6905                                 $file = $1;
6906                                 $binary = 1;
6907                         } else {
6908                                 (undef, $file, $lno, $ltext) = split(/:/, $line, 4);
6909                         }
6910                         if ($file ne $lastfile) {
6911                                 $lastfile and print "</td></tr>\n";
6912                                 if ($alternate++) {
6913                                         print "<tr class=\"dark\">\n";
6914                                 } else {
6915                                         print "<tr class=\"light\">\n";
6916                                 }
6917                                 print "<td class=\"list\">".
6918                                         $cgi->a({-href => href(action=>"blob", hash=>$co{'hash'},
6919                                                                file_name=>"$file"),
6920                                                 -class => "list"}, esc_path($file));
6921                                 print "</td><td>\n";
6922                                 $lastfile = $file;
6923                         }
6924                         if ($binary) {
6925                                 print "<div class=\"binary\">Binary file</div>\n";
6926                         } else {
6927                                 $ltext = untabify($ltext);
6928                                 if ($ltext =~ m/^(.*)($search_regexp)(.*)$/i) {
6929                                         $ltext = esc_html($1, -nbsp=>1);
6930                                         $ltext .= '<span class="match">';
6931                                         $ltext .= esc_html($2, -nbsp=>1);
6932                                         $ltext .= '</span>';
6933                                         $ltext .= esc_html($3, -nbsp=>1);
6934                                 } else {
6935                                         $ltext = esc_html($ltext, -nbsp=>1);
6936                                 }
6937                                 print "<div class=\"pre\">" .
6938                                         $cgi->a({-href => href(action=>"blob", hash=>$co{'hash'},
6939                                                                file_name=>"$file").'#l'.$lno,
6940                                                 -class => "linenr"}, sprintf('%4i', $lno))
6941                                         . ' ' .  $ltext . "</div>\n";
6942                         }
6943                 }
6944                 if ($lastfile) {
6945                         print "</td></tr>\n";
6946                         if ($matches > 1000) {
6947                                 print "<div class=\"diff nodifferences\">Too many matches, listing trimmed</div>\n";
6948                         }
6949                 } else {
6950                         print "<div class=\"diff nodifferences\">No matches found</div>\n";
6951                 }
6952                 close $fd;
6953
6954                 print "</table>\n";
6955         }
6956         git_footer_html();
6957 }
6958
6959 sub git_search_help {
6960         git_header_html();
6961         git_print_page_nav('','', $hash,$hash,$hash);
6962         print <<EOT;
6963 <p><strong>Pattern</strong> is by default a normal string that is matched precisely (but without
6964 regard to case, except in the case of pickaxe). However, when you check the <em>re</em> checkbox,
6965 the pattern entered is recognized as the POSIX extended
6966 <a href="http://en.wikipedia.org/wiki/Regular_expression">regular expression</a> (also case
6967 insensitive).</p>
6968 <dl>
6969 <dt><b>commit</b></dt>
6970 <dd>The commit messages and authorship information will be scanned for the given pattern.</dd>
6971 EOT
6972         my $have_grep = gitweb_check_feature('grep');
6973         if ($have_grep) {
6974                 print <<EOT;
6975 <dt><b>grep</b></dt>
6976 <dd>All files in the currently selected tree (HEAD unless you are explicitly browsing
6977     a different one) are searched for the given pattern. On large trees, this search can take
6978 a while and put some strain on the server, so please use it with some consideration. Note that
6979 due to git-grep peculiarity, currently if regexp mode is turned off, the matches are
6980 case-sensitive.</dd>
6981 EOT
6982         }
6983         print <<EOT;
6984 <dt><b>author</b></dt>
6985 <dd>Name and e-mail of the change author and date of birth of the patch will be scanned for the given pattern.</dd>
6986 <dt><b>committer</b></dt>
6987 <dd>Name and e-mail of the committer and date of commit will be scanned for the given pattern.</dd>
6988 EOT
6989         my $have_pickaxe = gitweb_check_feature('pickaxe');
6990         if ($have_pickaxe) {
6991                 print <<EOT;
6992 <dt><b>pickaxe</b></dt>
6993 <dd>All commits that caused the string to appear or disappear from any file (changes that
6994 added, removed or "modified" the string) will be listed. This search can take a while and
6995 takes a lot of strain on the server, so please use it wisely. Note that since you may be
6996 interested even in changes just changing the case as well, this search is case sensitive.</dd>
6997 EOT
6998         }
6999         print "</dl>\n";
7000         git_footer_html();
7001 }
7002
7003 sub git_shortlog {
7004         git_log_generic('shortlog', \&git_shortlog_body,
7005                         $hash, $hash_parent);
7006 }
7007
7008 ## ......................................................................
7009 ## feeds (RSS, Atom; OPML)
7010
7011 sub git_feed {
7012         my $format = shift || 'atom';
7013         my $have_blame = gitweb_check_feature('blame');
7014
7015         # Atom: http://www.atomenabled.org/developers/syndication/
7016         # RSS:  http://www.notestips.com/80256B3A007F2692/1/NAMO5P9UPQ
7017         if ($format ne 'rss' && $format ne 'atom') {
7018                 die_error(400, "Unknown web feed format");
7019         }
7020
7021         # log/feed of current (HEAD) branch, log of given branch, history of file/directory
7022         my $head = $hash || 'HEAD';
7023         my @commitlist = parse_commits($head, 150, 0, $file_name);
7024
7025         my %latest_commit;
7026         my %latest_date;
7027         my $content_type = "application/$format+xml";
7028         if (defined $cgi->http('HTTP_ACCEPT') &&
7029                  $cgi->Accept('text/xml') > $cgi->Accept($content_type)) {
7030                 # browser (feed reader) prefers text/xml
7031                 $content_type = 'text/xml';
7032         }
7033         if (defined($commitlist[0])) {
7034                 %latest_commit = %{$commitlist[0]};
7035                 my $latest_epoch = $latest_commit{'committer_epoch'};
7036                 %latest_date   = parse_date($latest_epoch);
7037                 my $if_modified = $cgi->http('IF_MODIFIED_SINCE');
7038                 if (defined $if_modified) {
7039                         my $since;
7040                         if (eval { require HTTP::Date; 1; }) {
7041                                 $since = HTTP::Date::str2time($if_modified);
7042                         } elsif (eval { require Time::ParseDate; 1; }) {
7043                                 $since = Time::ParseDate::parsedate($if_modified, GMT => 1);
7044                         }
7045                         if (defined $since && $latest_epoch <= $since) {
7046                                 print $cgi->header(
7047                                         -type => $content_type,
7048                                         -charset => 'utf-8',
7049                                         -last_modified => $latest_date{'rfc2822'},
7050                                         -status => '304 Not Modified');
7051                                 return;
7052                         }
7053                 }
7054                 print $cgi->header(
7055                         -type => $content_type,
7056                         -charset => 'utf-8',
7057                         -last_modified => $latest_date{'rfc2822'});
7058         } else {
7059                 print $cgi->header(
7060                         -type => $content_type,
7061                         -charset => 'utf-8');
7062         }
7063
7064         # Optimization: skip generating the body if client asks only
7065         # for Last-Modified date.
7066         return if ($cgi->request_method() eq 'HEAD');
7067
7068         # header variables
7069         my $title = "$site_name - $project/$action";
7070         my $feed_type = 'log';
7071         if (defined $hash) {
7072                 $title .= " - '$hash'";
7073                 $feed_type = 'branch log';
7074                 if (defined $file_name) {
7075                         $title .= " :: $file_name";
7076                         $feed_type = 'history';
7077                 }
7078         } elsif (defined $file_name) {
7079                 $title .= " - $file_name";
7080                 $feed_type = 'history';
7081         }
7082         $title .= " $feed_type";
7083         my $descr = git_get_project_description($project);
7084         if (defined $descr) {
7085                 $descr = esc_html($descr);
7086         } else {
7087                 $descr = "$project " .
7088                          ($format eq 'rss' ? 'RSS' : 'Atom') .
7089                          " feed";
7090         }
7091         my $owner = git_get_project_owner($project);
7092         $owner = esc_html($owner);
7093
7094         #header
7095         my $alt_url;
7096         if (defined $file_name) {
7097                 $alt_url = href(-full=>1, action=>"history", hash=>$hash, file_name=>$file_name);
7098         } elsif (defined $hash) {
7099                 $alt_url = href(-full=>1, action=>"log", hash=>$hash);
7100         } else {
7101                 $alt_url = href(-full=>1, action=>"summary");
7102         }
7103         print qq!<?xml version="1.0" encoding="utf-8"?>\n!;
7104         if ($format eq 'rss') {
7105                 print <<XML;
7106 <rss version="2.0" xmlns:content="http://purl.org/rss/1.0/modules/content/">
7107 <channel>
7108 XML
7109                 print "<title>$title</title>\n" .
7110                       "<link>$alt_url</link>\n" .
7111                       "<description>$descr</description>\n" .
7112                       "<language>en</language>\n" .
7113                       # project owner is responsible for 'editorial' content
7114                       "<managingEditor>$owner</managingEditor>\n";
7115                 if (defined $logo || defined $favicon) {
7116                         # prefer the logo to the favicon, since RSS
7117                         # doesn't allow both
7118                         my $img = esc_url($logo || $favicon);
7119                         print "<image>\n" .
7120                               "<url>$img</url>\n" .
7121                               "<title>$title</title>\n" .
7122                               "<link>$alt_url</link>\n" .
7123                               "</image>\n";
7124                 }
7125                 if (%latest_date) {
7126                         print "<pubDate>$latest_date{'rfc2822'}</pubDate>\n";
7127                         print "<lastBuildDate>$latest_date{'rfc2822'}</lastBuildDate>\n";
7128                 }
7129                 print "<generator>gitweb v.$version/$git_version</generator>\n";
7130         } elsif ($format eq 'atom') {
7131                 print <<XML;
7132 <feed xmlns="http://www.w3.org/2005/Atom">
7133 XML
7134                 print "<title>$title</title>\n" .
7135                       "<subtitle>$descr</subtitle>\n" .
7136                       '<link rel="alternate" type="text/html" href="' .
7137                       $alt_url . '" />' . "\n" .
7138                       '<link rel="self" type="' . $content_type . '" href="' .
7139                       $cgi->self_url() . '" />' . "\n" .
7140                       "<id>" . href(-full=>1) . "</id>\n" .
7141                       # use project owner for feed author
7142                       "<author><name>$owner</name></author>\n";
7143                 if (defined $favicon) {
7144                         print "<icon>" . esc_url($favicon) . "</icon>\n";
7145                 }
7146                 if (defined $logo_url) {
7147                         # not twice as wide as tall: 72 x 27 pixels
7148                         print "<logo>" . esc_url($logo) . "</logo>\n";
7149                 }
7150                 if (! %latest_date) {
7151                         # dummy date to keep the feed valid until commits trickle in:
7152                         print "<updated>1970-01-01T00:00:00Z</updated>\n";
7153                 } else {
7154                         print "<updated>$latest_date{'iso-8601'}</updated>\n";
7155                 }
7156                 print "<generator version='$version/$git_version'>gitweb</generator>\n";
7157         }
7158
7159         # contents
7160         for (my $i = 0; $i <= $#commitlist; $i++) {
7161                 my %co = %{$commitlist[$i]};
7162                 my $commit = $co{'id'};
7163                 # we read 150, we always show 30 and the ones more recent than 48 hours
7164                 if (($i >= 20) && ((time - $co{'author_epoch'}) > 48*60*60)) {
7165                         last;
7166                 }
7167                 my %cd = parse_date($co{'author_epoch'});
7168
7169                 # get list of changed files
7170                 open my $fd, "-|", git_cmd(), "diff-tree", '-r', @diff_opts,
7171                         $co{'parent'} || "--root",
7172                         $co{'id'}, "--", (defined $file_name ? $file_name : ())
7173                         or next;
7174                 my @difftree = map { chomp; $_ } <$fd>;
7175                 close $fd
7176                         or next;
7177
7178                 # print element (entry, item)
7179                 my $co_url = href(-full=>1, action=>"commitdiff", hash=>$commit);
7180                 if ($format eq 'rss') {
7181                         print "<item>\n" .
7182                               "<title>" . esc_html($co{'title'}) . "</title>\n" .
7183                               "<author>" . esc_html($co{'author'}) . "</author>\n" .
7184                               "<pubDate>$cd{'rfc2822'}</pubDate>\n" .
7185                               "<guid isPermaLink=\"true\">$co_url</guid>\n" .
7186                               "<link>$co_url</link>\n" .
7187                               "<description>" . esc_html($co{'title'}) . "</description>\n" .
7188                               "<content:encoded>" .
7189                               "<![CDATA[\n";
7190                 } elsif ($format eq 'atom') {
7191                         print "<entry>\n" .
7192                               "<title type=\"html\">" . esc_html($co{'title'}) . "</title>\n" .
7193                               "<updated>$cd{'iso-8601'}</updated>\n" .
7194                               "<author>\n" .
7195                               "  <name>" . esc_html($co{'author_name'}) . "</name>\n";
7196                         if ($co{'author_email'}) {
7197                                 print "  <email>" . esc_html($co{'author_email'}) . "</email>\n";
7198                         }
7199                         print "</author>\n" .
7200                               # use committer for contributor
7201                               "<contributor>\n" .
7202                               "  <name>" . esc_html($co{'committer_name'}) . "</name>\n";
7203                         if ($co{'committer_email'}) {
7204                                 print "  <email>" . esc_html($co{'committer_email'}) . "</email>\n";
7205                         }
7206                         print "</contributor>\n" .
7207                               "<published>$cd{'iso-8601'}</published>\n" .
7208                               "<link rel=\"alternate\" type=\"text/html\" href=\"$co_url\" />\n" .
7209                               "<id>$co_url</id>\n" .
7210                               "<content type=\"xhtml\" xml:base=\"" . esc_url($my_url) . "\">\n" .
7211                               "<div xmlns=\"http://www.w3.org/1999/xhtml\">\n";
7212                 }
7213                 my $comment = $co{'comment'};
7214                 print "<pre>\n";
7215                 foreach my $line (@$comment) {
7216                         $line = esc_html($line);
7217                         print "$line\n";
7218                 }
7219                 print "</pre><ul>\n";
7220                 foreach my $difftree_line (@difftree) {
7221                         my %difftree = parse_difftree_raw_line($difftree_line);
7222                         next if !$difftree{'from_id'};
7223
7224                         my $file = $difftree{'file'} || $difftree{'to_file'};
7225
7226                         print "<li>" .
7227                               "[" .
7228                               $cgi->a({-href => href(-full=>1, action=>"blobdiff",
7229                                                      hash=>$difftree{'to_id'}, hash_parent=>$difftree{'from_id'},
7230                                                      hash_base=>$co{'id'}, hash_parent_base=>$co{'parent'},
7231                                                      file_name=>$file, file_parent=>$difftree{'from_file'}),
7232                                       -title => "diff"}, 'D');
7233                         if ($have_blame) {
7234                                 print $cgi->a({-href => href(-full=>1, action=>"blame",
7235                                                              file_name=>$file, hash_base=>$commit),
7236                                               -title => "blame"}, 'B');
7237                         }
7238                         # if this is not a feed of a file history
7239                         if (!defined $file_name || $file_name ne $file) {
7240                                 print $cgi->a({-href => href(-full=>1, action=>"history",
7241                                                              file_name=>$file, hash=>$commit),
7242                                               -title => "history"}, 'H');
7243                         }
7244                         $file = esc_path($file);
7245                         print "] ".
7246                               "$file</li>\n";
7247                 }
7248                 if ($format eq 'rss') {
7249                         print "</ul>]]>\n" .
7250                               "</content:encoded>\n" .
7251                               "</item>\n";
7252                 } elsif ($format eq 'atom') {
7253                         print "</ul>\n</div>\n" .
7254                               "</content>\n" .
7255                               "</entry>\n";
7256                 }
7257         }
7258
7259         # end of feed
7260         if ($format eq 'rss') {
7261                 print "</channel>\n</rss>\n";
7262         } elsif ($format eq 'atom') {
7263                 print "</feed>\n";
7264         }
7265 }
7266
7267 sub git_rss {
7268         git_feed('rss');
7269 }
7270
7271 sub git_atom {
7272         git_feed('atom');
7273 }
7274
7275 sub git_opml {
7276         my @list = git_get_projects_list();
7277
7278         print $cgi->header(
7279                 -type => 'text/xml',
7280                 -charset => 'utf-8',
7281                 -content_disposition => 'inline; filename="opml.xml"');
7282
7283         print <<XML;
7284 <?xml version="1.0" encoding="utf-8"?>
7285 <opml version="1.0">
7286 <head>
7287   <title>$site_name OPML Export</title>
7288 </head>
7289 <body>
7290 <outline text="git RSS feeds">
7291 XML
7292
7293         foreach my $pr (@list) {
7294                 my %proj = %$pr;
7295                 my $head = git_get_head_hash($proj{'path'});
7296                 if (!defined $head) {
7297                         next;
7298                 }
7299                 $git_dir = "$projectroot/$proj{'path'}";
7300                 my %co = parse_commit($head);
7301                 if (!%co) {
7302                         next;
7303                 }
7304
7305                 my $path = esc_html(chop_str($proj{'path'}, 25, 5));
7306                 my $rss  = href('project' => $proj{'path'}, 'action' => 'rss', -full => 1);
7307                 my $html = href('project' => $proj{'path'}, 'action' => 'summary', -full => 1);
7308                 print "<outline type=\"rss\" text=\"$path\" title=\"$path\" xmlUrl=\"$rss\" htmlUrl=\"$html\"/>\n";
7309         }
7310         print <<XML;
7311 </outline>
7312 </body>
7313 </opml>
7314 XML
7315 }