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                 $href .= "/".esc_path_info($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                         $href .= "/".esc_path_info($params{'action'})
1245                                 unless $params{'action'} eq 'summary';
1246                         delete $params{'action'};
1247                 }
1248
1249                 # Next, we put hash_parent_base:/file_parent..hash_base:/file_name,
1250                 # stripping nonexistent or useless pieces
1251                 $href .= "/" if ($params{'hash_base'} || $params{'hash_parent_base'}
1252                         || $params{'hash_parent'} || $params{'hash'});
1253                 if (defined $params{'hash_base'}) {
1254                         if (defined $params{'hash_parent_base'}) {
1255                                 $href .= esc_path_info($params{'hash_parent_base'});
1256                                 # skip the file_parent if it's the same as the file_name
1257                                 if (defined $params{'file_parent'}) {
1258                                         if (defined $params{'file_name'} && $params{'file_parent'} eq $params{'file_name'}) {
1259                                                 delete $params{'file_parent'};
1260                                         } elsif ($params{'file_parent'} !~ /\.\./) {
1261                                                 $href .= ":/".esc_path_info($params{'file_parent'});
1262                                                 delete $params{'file_parent'};
1263                                         }
1264                                 }
1265                                 $href .= "..";
1266                                 delete $params{'hash_parent'};
1267                                 delete $params{'hash_parent_base'};
1268                         } elsif (defined $params{'hash_parent'}) {
1269                                 $href .= esc_path_info($params{'hash_parent'}). "..";
1270                                 delete $params{'hash_parent'};
1271                         }
1272
1273                         $href .= esc_path_info($params{'hash_base'});
1274                         if (defined $params{'file_name'} && $params{'file_name'} !~ /\.\./) {
1275                                 $href .= ":/".esc_path_info($params{'file_name'});
1276                                 delete $params{'file_name'};
1277                         }
1278                         delete $params{'hash'};
1279                         delete $params{'hash_base'};
1280                 } elsif (defined $params{'hash'}) {
1281                         $href .= esc_path_info($params{'hash'});
1282                         delete $params{'hash'};
1283                 }
1284
1285                 # If the action was a snapshot, we can absorb the
1286                 # snapshot_format parameter too
1287                 if ($is_snapshot) {
1288                         my $fmt = $params{'snapshot_format'};
1289                         # snapshot_format should always be defined when href()
1290                         # is called, but just in case some code forgets, we
1291                         # fall back to the default
1292                         $fmt ||= $snapshot_fmts[0];
1293                         $href .= $known_snapshot_formats{$fmt}{'suffix'};
1294                         delete $params{'snapshot_format'};
1295                 }
1296         }
1297
1298         # now encode the parameters explicitly
1299         my @result = ();
1300         for (my $i = 0; $i < @cgi_param_mapping; $i += 2) {
1301                 my ($name, $symbol) = ($cgi_param_mapping[$i], $cgi_param_mapping[$i+1]);
1302                 if (defined $params{$name}) {
1303                         if (ref($params{$name}) eq "ARRAY") {
1304                                 foreach my $par (@{$params{$name}}) {
1305                                         push @result, $symbol . "=" . esc_param($par);
1306                                 }
1307                         } else {
1308                                 push @result, $symbol . "=" . esc_param($params{$name});
1309                         }
1310                 }
1311         }
1312         $href .= "?" . join(';', @result) if scalar @result;
1313
1314         # final transformation: trailing spaces must be escaped (URI-encoded)
1315         $href =~ s/(\s+)$/CGI::escape($1)/e;
1316
1317         return $href;
1318 }
1319
1320
1321 ## ======================================================================
1322 ## validation, quoting/unquoting and escaping
1323
1324 sub validate_action {
1325         my $input = shift || return undef;
1326         return undef unless exists $actions{$input};
1327         return $input;
1328 }
1329
1330 sub validate_project {
1331         my $input = shift || return undef;
1332         if (!validate_pathname($input) ||
1333                 !(-d "$projectroot/$input") ||
1334                 !check_export_ok("$projectroot/$input") ||
1335                 ($strict_export && !project_in_list($input))) {
1336                 return undef;
1337         } else {
1338                 return $input;
1339         }
1340 }
1341
1342 sub validate_pathname {
1343         my $input = shift || return undef;
1344
1345         # no '.' or '..' as elements of path, i.e. no '.' nor '..'
1346         # at the beginning, at the end, and between slashes.
1347         # also this catches doubled slashes
1348         if ($input =~ m!(^|/)(|\.|\.\.)(/|$)!) {
1349                 return undef;
1350         }
1351         # no null characters
1352         if ($input =~ m!\0!) {
1353                 return undef;
1354         }
1355         return $input;
1356 }
1357
1358 sub validate_refname {
1359         my $input = shift || return undef;
1360
1361         # textual hashes are O.K.
1362         if ($input =~ m/^[0-9a-fA-F]{40}$/) {
1363                 return $input;
1364         }
1365         # it must be correct pathname
1366         $input = validate_pathname($input)
1367                 or return undef;
1368         # restrictions on ref name according to git-check-ref-format
1369         if ($input =~ m!(/\.|\.\.|[\000-\040\177 ~^:?*\[]|/$)!) {
1370                 return undef;
1371         }
1372         return $input;
1373 }
1374
1375 # decode sequences of octets in utf8 into Perl's internal form,
1376 # which is utf-8 with utf8 flag set if needed.  gitweb writes out
1377 # in utf-8 thanks to "binmode STDOUT, ':utf8'" at beginning
1378 sub to_utf8 {
1379         my $str = shift;
1380         return undef unless defined $str;
1381         if (utf8::valid($str)) {
1382                 utf8::decode($str);
1383                 return $str;
1384         } else {
1385                 return decode($fallback_encoding, $str, Encode::FB_DEFAULT);
1386         }
1387 }
1388
1389 # quote unsafe chars, but keep the slash, even when it's not
1390 # correct, but quoted slashes look too horrible in bookmarks
1391 sub esc_param {
1392         my $str = shift;
1393         return undef unless defined $str;
1394         $str =~ s/([^A-Za-z0-9\-_.~()\/:@ ]+)/CGI::escape($1)/eg;
1395         $str =~ s/ /\+/g;
1396         return $str;
1397 }
1398
1399 # the quoting rules for path_info fragment are slightly different
1400 sub esc_path_info {
1401         my $str = shift;
1402         return undef unless defined $str;
1403
1404         # path_info doesn't treat '+' as space (specially), but '?' must be escaped
1405         $str =~ s/([^A-Za-z0-9\-_.~();\/;:@&= +]+)/CGI::escape($1)/eg;
1406
1407         return $str;
1408 }
1409
1410 # quote unsafe chars in whole URL, so some characters cannot be quoted
1411 sub esc_url {
1412         my $str = shift;
1413         return undef unless defined $str;
1414         $str =~ s/([^A-Za-z0-9\-_.~();\/;?:@&= ]+)/CGI::escape($1)/eg;
1415         $str =~ s/ /\+/g;
1416         return $str;
1417 }
1418
1419 # replace invalid utf8 character with SUBSTITUTION sequence
1420 sub esc_html {
1421         my $str = shift;
1422         my %opts = @_;
1423
1424         return undef unless defined $str;
1425
1426         $str = to_utf8($str);
1427         $str = $cgi->escapeHTML($str);
1428         if ($opts{'-nbsp'}) {
1429                 $str =~ s/ /&nbsp;/g;
1430         }
1431         $str =~ s|([[:cntrl:]])|(($1 ne "\t") ? quot_cec($1) : $1)|eg;
1432         return $str;
1433 }
1434
1435 # quote control characters and escape filename to HTML
1436 sub esc_path {
1437         my $str = shift;
1438         my %opts = @_;
1439
1440         return undef unless defined $str;
1441
1442         $str = to_utf8($str);
1443         $str = $cgi->escapeHTML($str);
1444         if ($opts{'-nbsp'}) {
1445                 $str =~ s/ /&nbsp;/g;
1446         }
1447         $str =~ s|([[:cntrl:]])|quot_cec($1)|eg;
1448         return $str;
1449 }
1450
1451 # Make control characters "printable", using character escape codes (CEC)
1452 sub quot_cec {
1453         my $cntrl = shift;
1454         my %opts = @_;
1455         my %es = ( # character escape codes, aka escape sequences
1456                 "\t" => '\t',   # tab            (HT)
1457                 "\n" => '\n',   # line feed      (LF)
1458                 "\r" => '\r',   # carrige return (CR)
1459                 "\f" => '\f',   # form feed      (FF)
1460                 "\b" => '\b',   # backspace      (BS)
1461                 "\a" => '\a',   # alarm (bell)   (BEL)
1462                 "\e" => '\e',   # escape         (ESC)
1463                 "\013" => '\v', # vertical tab   (VT)
1464                 "\000" => '\0', # nul character  (NUL)
1465         );
1466         my $chr = ( (exists $es{$cntrl})
1467                     ? $es{$cntrl}
1468                     : sprintf('\%2x', ord($cntrl)) );
1469         if ($opts{-nohtml}) {
1470                 return $chr;
1471         } else {
1472                 return "<span class=\"cntrl\">$chr</span>";
1473         }
1474 }
1475
1476 # Alternatively use unicode control pictures codepoints,
1477 # Unicode "printable representation" (PR)
1478 sub quot_upr {
1479         my $cntrl = shift;
1480         my %opts = @_;
1481
1482         my $chr = sprintf('&#%04d;', 0x2400+ord($cntrl));
1483         if ($opts{-nohtml}) {
1484                 return $chr;
1485         } else {
1486                 return "<span class=\"cntrl\">$chr</span>";
1487         }
1488 }
1489
1490 # git may return quoted and escaped filenames
1491 sub unquote {
1492         my $str = shift;
1493
1494         sub unq {
1495                 my $seq = shift;
1496                 my %es = ( # character escape codes, aka escape sequences
1497                         't' => "\t",   # tab            (HT, TAB)
1498                         'n' => "\n",   # newline        (NL)
1499                         'r' => "\r",   # return         (CR)
1500                         'f' => "\f",   # form feed      (FF)
1501                         'b' => "\b",   # backspace      (BS)
1502                         'a' => "\a",   # alarm (bell)   (BEL)
1503                         'e' => "\e",   # escape         (ESC)
1504                         'v' => "\013", # vertical tab   (VT)
1505                 );
1506
1507                 if ($seq =~ m/^[0-7]{1,3}$/) {
1508                         # octal char sequence
1509                         return chr(oct($seq));
1510                 } elsif (exists $es{$seq}) {
1511                         # C escape sequence, aka character escape code
1512                         return $es{$seq};
1513                 }
1514                 # quoted ordinary character
1515                 return $seq;
1516         }
1517
1518         if ($str =~ m/^"(.*)"$/) {
1519                 # needs unquoting
1520                 $str = $1;
1521                 $str =~ s/\\([^0-7]|[0-7]{1,3})/unq($1)/eg;
1522         }
1523         return $str;
1524 }
1525
1526 # escape tabs (convert tabs to spaces)
1527 sub untabify {
1528         my $line = shift;
1529
1530         while ((my $pos = index($line, "\t")) != -1) {
1531                 if (my $count = (8 - ($pos % 8))) {
1532                         my $spaces = ' ' x $count;
1533                         $line =~ s/\t/$spaces/;
1534                 }
1535         }
1536
1537         return $line;
1538 }
1539
1540 sub project_in_list {
1541         my $project = shift;
1542         my @list = git_get_projects_list();
1543         return @list && scalar(grep { $_->{'path'} eq $project } @list);
1544 }
1545
1546 ## ----------------------------------------------------------------------
1547 ## HTML aware string manipulation
1548
1549 # Try to chop given string on a word boundary between position
1550 # $len and $len+$add_len. If there is no word boundary there,
1551 # chop at $len+$add_len. Do not chop if chopped part plus ellipsis
1552 # (marking chopped part) would be longer than given string.
1553 sub chop_str {
1554         my $str = shift;
1555         my $len = shift;
1556         my $add_len = shift || 10;
1557         my $where = shift || 'right'; # 'left' | 'center' | 'right'
1558
1559         # Make sure perl knows it is utf8 encoded so we don't
1560         # cut in the middle of a utf8 multibyte char.
1561         $str = to_utf8($str);
1562
1563         # allow only $len chars, but don't cut a word if it would fit in $add_len
1564         # if it doesn't fit, cut it if it's still longer than the dots we would add
1565         # remove chopped character entities entirely
1566
1567         # when chopping in the middle, distribute $len into left and right part
1568         # return early if chopping wouldn't make string shorter
1569         if ($where eq 'center') {
1570                 return $str if ($len + 5 >= length($str)); # filler is length 5
1571                 $len = int($len/2);
1572         } else {
1573                 return $str if ($len + 4 >= length($str)); # filler is length 4
1574         }
1575
1576         # regexps: ending and beginning with word part up to $add_len
1577         my $endre = qr/.{$len}\w{0,$add_len}/;
1578         my $begre = qr/\w{0,$add_len}.{$len}/;
1579
1580         if ($where eq 'left') {
1581                 $str =~ m/^(.*?)($begre)$/;
1582                 my ($lead, $body) = ($1, $2);
1583                 if (length($lead) > 4) {
1584                         $lead = " ...";
1585                 }
1586                 return "$lead$body";
1587
1588         } elsif ($where eq 'center') {
1589                 $str =~ m/^($endre)(.*)$/;
1590                 my ($left, $str)  = ($1, $2);
1591                 $str =~ m/^(.*?)($begre)$/;
1592                 my ($mid, $right) = ($1, $2);
1593                 if (length($mid) > 5) {
1594                         $mid = " ... ";
1595                 }
1596                 return "$left$mid$right";
1597
1598         } else {
1599                 $str =~ m/^($endre)(.*)$/;
1600                 my $body = $1;
1601                 my $tail = $2;
1602                 if (length($tail) > 4) {
1603                         $tail = "... ";
1604                 }
1605                 return "$body$tail";
1606         }
1607 }
1608
1609 # takes the same arguments as chop_str, but also wraps a <span> around the
1610 # result with a title attribute if it does get chopped. Additionally, the
1611 # string is HTML-escaped.
1612 sub chop_and_escape_str {
1613         my ($str) = @_;
1614
1615         my $chopped = chop_str(@_);
1616         if ($chopped eq $str) {
1617                 return esc_html($chopped);
1618         } else {
1619                 $str =~ s/[[:cntrl:]]/?/g;
1620                 return $cgi->span({-title=>$str}, esc_html($chopped));
1621         }
1622 }
1623
1624 ## ----------------------------------------------------------------------
1625 ## functions returning short strings
1626
1627 # CSS class for given age value (in seconds)
1628 sub age_class {
1629         my $age = shift;
1630
1631         if (!defined $age) {
1632                 return "noage";
1633         } elsif ($age < 60*60*2) {
1634                 return "age0";
1635         } elsif ($age < 60*60*24*2) {
1636                 return "age1";
1637         } else {
1638                 return "age2";
1639         }
1640 }
1641
1642 # convert age in seconds to "nn units ago" string
1643 sub age_string {
1644         my $age = shift;
1645         my $age_str;
1646
1647         if ($age > 60*60*24*365*2) {
1648                 $age_str = (int $age/60/60/24/365);
1649                 $age_str .= " years ago";
1650         } elsif ($age > 60*60*24*(365/12)*2) {
1651                 $age_str = int $age/60/60/24/(365/12);
1652                 $age_str .= " months ago";
1653         } elsif ($age > 60*60*24*7*2) {
1654                 $age_str = int $age/60/60/24/7;
1655                 $age_str .= " weeks ago";
1656         } elsif ($age > 60*60*24*2) {
1657                 $age_str = int $age/60/60/24;
1658                 $age_str .= " days ago";
1659         } elsif ($age > 60*60*2) {
1660                 $age_str = int $age/60/60;
1661                 $age_str .= " hours ago";
1662         } elsif ($age > 60*2) {
1663                 $age_str = int $age/60;
1664                 $age_str .= " min ago";
1665         } elsif ($age > 2) {
1666                 $age_str = int $age;
1667                 $age_str .= " sec ago";
1668         } else {
1669                 $age_str .= " right now";
1670         }
1671         return $age_str;
1672 }
1673
1674 use constant {
1675         S_IFINVALID => 0030000,
1676         S_IFGITLINK => 0160000,
1677 };
1678
1679 # submodule/subproject, a commit object reference
1680 sub S_ISGITLINK {
1681         my $mode = shift;
1682
1683         return (($mode & S_IFMT) == S_IFGITLINK)
1684 }
1685
1686 # convert file mode in octal to symbolic file mode string
1687 sub mode_str {
1688         my $mode = oct shift;
1689
1690         if (S_ISGITLINK($mode)) {
1691                 return 'm---------';
1692         } elsif (S_ISDIR($mode & S_IFMT)) {
1693                 return 'drwxr-xr-x';
1694         } elsif (S_ISLNK($mode)) {
1695                 return 'lrwxrwxrwx';
1696         } elsif (S_ISREG($mode)) {
1697                 # git cares only about the executable bit
1698                 if ($mode & S_IXUSR) {
1699                         return '-rwxr-xr-x';
1700                 } else {
1701                         return '-rw-r--r--';
1702                 };
1703         } else {
1704                 return '----------';
1705         }
1706 }
1707
1708 # convert file mode in octal to file type string
1709 sub file_type {
1710         my $mode = shift;
1711
1712         if ($mode !~ m/^[0-7]+$/) {
1713                 return $mode;
1714         } else {
1715                 $mode = oct $mode;
1716         }
1717
1718         if (S_ISGITLINK($mode)) {
1719                 return "submodule";
1720         } elsif (S_ISDIR($mode & S_IFMT)) {
1721                 return "directory";
1722         } elsif (S_ISLNK($mode)) {
1723                 return "symlink";
1724         } elsif (S_ISREG($mode)) {
1725                 return "file";
1726         } else {
1727                 return "unknown";
1728         }
1729 }
1730
1731 # convert file mode in octal to file type description string
1732 sub file_type_long {
1733         my $mode = shift;
1734
1735         if ($mode !~ m/^[0-7]+$/) {
1736                 return $mode;
1737         } else {
1738                 $mode = oct $mode;
1739         }
1740
1741         if (S_ISGITLINK($mode)) {
1742                 return "submodule";
1743         } elsif (S_ISDIR($mode & S_IFMT)) {
1744                 return "directory";
1745         } elsif (S_ISLNK($mode)) {
1746                 return "symlink";
1747         } elsif (S_ISREG($mode)) {
1748                 if ($mode & S_IXUSR) {
1749                         return "executable";
1750                 } else {
1751                         return "file";
1752                 };
1753         } else {
1754                 return "unknown";
1755         }
1756 }
1757
1758
1759 ## ----------------------------------------------------------------------
1760 ## functions returning short HTML fragments, or transforming HTML fragments
1761 ## which don't belong to other sections
1762
1763 # format line of commit message.
1764 sub format_log_line_html {
1765         my $line = shift;
1766
1767         $line = esc_html($line, -nbsp=>1);
1768         $line =~ s{\b([0-9a-fA-F]{8,40})\b}{
1769                 $cgi->a({-href => href(action=>"object", hash=>$1),
1770                                         -class => "text"}, $1);
1771         }eg;
1772
1773         return $line;
1774 }
1775
1776 # format marker of refs pointing to given object
1777
1778 # the destination action is chosen based on object type and current context:
1779 # - for annotated tags, we choose the tag view unless it's the current view
1780 #   already, in which case we go to shortlog view
1781 # - for other refs, we keep the current view if we're in history, shortlog or
1782 #   log view, and select shortlog otherwise
1783 sub format_ref_marker {
1784         my ($refs, $id) = @_;
1785         my $markers = '';
1786
1787         if (defined $refs->{$id}) {
1788                 foreach my $ref (@{$refs->{$id}}) {
1789                         # this code exploits the fact that non-lightweight tags are the
1790                         # only indirect objects, and that they are the only objects for which
1791                         # we want to use tag instead of shortlog as action
1792                         my ($type, $name) = qw();
1793                         my $indirect = ($ref =~ s/\^\{\}$//);
1794                         # e.g. tags/v2.6.11 or heads/next
1795                         if ($ref =~ m!^(.*?)s?/(.*)$!) {
1796                                 $type = $1;
1797                                 $name = $2;
1798                         } else {
1799                                 $type = "ref";
1800                                 $name = $ref;
1801                         }
1802
1803                         my $class = $type;
1804                         $class .= " indirect" if $indirect;
1805
1806                         my $dest_action = "shortlog";
1807
1808                         if ($indirect) {
1809                                 $dest_action = "tag" unless $action eq "tag";
1810                         } elsif ($action =~ /^(history|(short)?log)$/) {
1811                                 $dest_action = $action;
1812                         }
1813
1814                         my $dest = "";
1815                         $dest .= "refs/" unless $ref =~ m!^refs/!;
1816                         $dest .= $ref;
1817
1818                         my $link = $cgi->a({
1819                                 -href => href(
1820                                         action=>$dest_action,
1821                                         hash=>$dest
1822                                 )}, $name);
1823
1824                         $markers .= " <span class=\"$class\" title=\"$ref\">" .
1825                                 $link . "</span>";
1826                 }
1827         }
1828
1829         if ($markers) {
1830                 return ' <span class="refs">'. $markers . '</span>';
1831         } else {
1832                 return "";
1833         }
1834 }
1835
1836 # format, perhaps shortened and with markers, title line
1837 sub format_subject_html {
1838         my ($long, $short, $href, $extra) = @_;
1839         $extra = '' unless defined($extra);
1840
1841         if (length($short) < length($long)) {
1842                 $long =~ s/[[:cntrl:]]/?/g;
1843                 return $cgi->a({-href => $href, -class => "list subject",
1844                                 -title => to_utf8($long)},
1845                        esc_html($short)) . $extra;
1846         } else {
1847                 return $cgi->a({-href => $href, -class => "list subject"},
1848                        esc_html($long)) . $extra;
1849         }
1850 }
1851
1852 # Rather than recomputing the url for an email multiple times, we cache it
1853 # after the first hit. This gives a visible benefit in views where the avatar
1854 # for the same email is used repeatedly (e.g. shortlog).
1855 # The cache is shared by all avatar engines (currently gravatar only), which
1856 # are free to use it as preferred. Since only one avatar engine is used for any
1857 # given page, there's no risk for cache conflicts.
1858 our %avatar_cache = ();
1859
1860 # Compute the picon url for a given email, by using the picon search service over at
1861 # http://www.cs.indiana.edu/picons/search.html
1862 sub picon_url {
1863         my $email = lc shift;
1864         if (!$avatar_cache{$email}) {
1865                 my ($user, $domain) = split('@', $email);
1866                 $avatar_cache{$email} =
1867                         "http://www.cs.indiana.edu/cgi-pub/kinzler/piconsearch.cgi/" .
1868                         "$domain/$user/" .
1869                         "users+domains+unknown/up/single";
1870         }
1871         return $avatar_cache{$email};
1872 }
1873
1874 # Compute the gravatar url for a given email, if it's not in the cache already.
1875 # Gravatar stores only the part of the URL before the size, since that's the
1876 # one computationally more expensive. This also allows reuse of the cache for
1877 # different sizes (for this particular engine).
1878 sub gravatar_url {
1879         my $email = lc shift;
1880         my $size = shift;
1881         $avatar_cache{$email} ||=
1882                 "http://www.gravatar.com/avatar/" .
1883                         Digest::MD5::md5_hex($email) . "?s=";
1884         return $avatar_cache{$email} . $size;
1885 }
1886
1887 # Insert an avatar for the given $email at the given $size if the feature
1888 # is enabled.
1889 sub git_get_avatar {
1890         my ($email, %opts) = @_;
1891         my $pre_white  = ($opts{-pad_before} ? "&nbsp;" : "");
1892         my $post_white = ($opts{-pad_after}  ? "&nbsp;" : "");
1893         $opts{-size} ||= 'default';
1894         my $size = $avatar_size{$opts{-size}} || $avatar_size{'default'};
1895         my $url = "";
1896         if ($git_avatar eq 'gravatar') {
1897                 $url = gravatar_url($email, $size);
1898         } elsif ($git_avatar eq 'picon') {
1899                 $url = picon_url($email);
1900         }
1901         # Other providers can be added by extending the if chain, defining $url
1902         # as needed. If no variant puts something in $url, we assume avatars
1903         # are completely disabled/unavailable.
1904         if ($url) {
1905                 return $pre_white .
1906                        "<img width=\"$size\" " .
1907                             "class=\"avatar\" " .
1908                             "src=\"$url\" " .
1909                             "alt=\"\" " .
1910                        "/>" . $post_white;
1911         } else {
1912                 return "";
1913         }
1914 }
1915
1916 sub format_search_author {
1917         my ($author, $searchtype, $displaytext) = @_;
1918         my $have_search = gitweb_check_feature('search');
1919
1920         if ($have_search) {
1921                 my $performed = "";
1922                 if ($searchtype eq 'author') {
1923                         $performed = "authored";
1924                 } elsif ($searchtype eq 'committer') {
1925                         $performed = "committed";
1926                 }
1927
1928                 return $cgi->a({-href => href(action=>"search", hash=>$hash,
1929                                 searchtext=>$author,
1930                                 searchtype=>$searchtype), class=>"list",
1931                                 title=>"Search for commits $performed by $author"},
1932                                 $displaytext);
1933
1934         } else {
1935                 return $displaytext;
1936         }
1937 }
1938
1939 # format the author name of the given commit with the given tag
1940 # the author name is chopped and escaped according to the other
1941 # optional parameters (see chop_str).
1942 sub format_author_html {
1943         my $tag = shift;
1944         my $co = shift;
1945         my $author = chop_and_escape_str($co->{'author_name'}, @_);
1946         return "<$tag class=\"author\">" .
1947                format_search_author($co->{'author_name'}, "author",
1948                        git_get_avatar($co->{'author_email'}, -pad_after => 1) .
1949                        $author) .
1950                "</$tag>";
1951 }
1952
1953 # format git diff header line, i.e. "diff --(git|combined|cc) ..."
1954 sub format_git_diff_header_line {
1955         my $line = shift;
1956         my $diffinfo = shift;
1957         my ($from, $to) = @_;
1958
1959         if ($diffinfo->{'nparents'}) {
1960                 # combined diff
1961                 $line =~ s!^(diff (.*?) )"?.*$!$1!;
1962                 if ($to->{'href'}) {
1963                         $line .= $cgi->a({-href => $to->{'href'}, -class => "path"},
1964                                          esc_path($to->{'file'}));
1965                 } else { # file was deleted (no href)
1966                         $line .= esc_path($to->{'file'});
1967                 }
1968         } else {
1969                 # "ordinary" diff
1970                 $line =~ s!^(diff (.*?) )"?a/.*$!$1!;
1971                 if ($from->{'href'}) {
1972                         $line .= $cgi->a({-href => $from->{'href'}, -class => "path"},
1973                                          'a/' . esc_path($from->{'file'}));
1974                 } else { # file was added (no href)
1975                         $line .= 'a/' . esc_path($from->{'file'});
1976                 }
1977                 $line .= ' ';
1978                 if ($to->{'href'}) {
1979                         $line .= $cgi->a({-href => $to->{'href'}, -class => "path"},
1980                                          'b/' . esc_path($to->{'file'}));
1981                 } else { # file was deleted
1982                         $line .= 'b/' . esc_path($to->{'file'});
1983                 }
1984         }
1985
1986         return "<div class=\"diff header\">$line</div>\n";
1987 }
1988
1989 # format extended diff header line, before patch itself
1990 sub format_extended_diff_header_line {
1991         my $line = shift;
1992         my $diffinfo = shift;
1993         my ($from, $to) = @_;
1994
1995         # match <path>
1996         if ($line =~ s!^((copy|rename) from ).*$!$1! && $from->{'href'}) {
1997                 $line .= $cgi->a({-href=>$from->{'href'}, -class=>"path"},
1998                                        esc_path($from->{'file'}));
1999         }
2000         if ($line =~ s!^((copy|rename) to ).*$!$1! && $to->{'href'}) {
2001                 $line .= $cgi->a({-href=>$to->{'href'}, -class=>"path"},
2002                                  esc_path($to->{'file'}));
2003         }
2004         # match single <mode>
2005         if ($line =~ m/\s(\d{6})$/) {
2006                 $line .= '<span class="info"> (' .
2007                          file_type_long($1) .
2008                          ')</span>';
2009         }
2010         # match <hash>
2011         if ($line =~ m/^index [0-9a-fA-F]{40},[0-9a-fA-F]{40}/) {
2012                 # can match only for combined diff
2013                 $line = 'index ';
2014                 for (my $i = 0; $i < $diffinfo->{'nparents'}; $i++) {
2015                         if ($from->{'href'}[$i]) {
2016                                 $line .= $cgi->a({-href=>$from->{'href'}[$i],
2017                                                   -class=>"hash"},
2018                                                  substr($diffinfo->{'from_id'}[$i],0,7));
2019                         } else {
2020                                 $line .= '0' x 7;
2021                         }
2022                         # separator
2023                         $line .= ',' if ($i < $diffinfo->{'nparents'} - 1);
2024                 }
2025                 $line .= '..';
2026                 if ($to->{'href'}) {
2027                         $line .= $cgi->a({-href=>$to->{'href'}, -class=>"hash"},
2028                                          substr($diffinfo->{'to_id'},0,7));
2029                 } else {
2030                         $line .= '0' x 7;
2031                 }
2032
2033         } elsif ($line =~ m/^index [0-9a-fA-F]{40}..[0-9a-fA-F]{40}/) {
2034                 # can match only for ordinary diff
2035                 my ($from_link, $to_link);
2036                 if ($from->{'href'}) {
2037                         $from_link = $cgi->a({-href=>$from->{'href'}, -class=>"hash"},
2038                                              substr($diffinfo->{'from_id'},0,7));
2039                 } else {
2040                         $from_link = '0' x 7;
2041                 }
2042                 if ($to->{'href'}) {
2043                         $to_link = $cgi->a({-href=>$to->{'href'}, -class=>"hash"},
2044                                            substr($diffinfo->{'to_id'},0,7));
2045                 } else {
2046                         $to_link = '0' x 7;
2047                 }
2048                 my ($from_id, $to_id) = ($diffinfo->{'from_id'}, $diffinfo->{'to_id'});
2049                 $line =~ s!$from_id\.\.$to_id!$from_link..$to_link!;
2050         }
2051
2052         return $line . "<br/>\n";
2053 }
2054
2055 # format from-file/to-file diff header
2056 sub format_diff_from_to_header {
2057         my ($from_line, $to_line, $diffinfo, $from, $to, @parents) = @_;
2058         my $line;
2059         my $result = '';
2060
2061         $line = $from_line;
2062         #assert($line =~ m/^---/) if DEBUG;
2063         # no extra formatting for "^--- /dev/null"
2064         if (! $diffinfo->{'nparents'}) {
2065                 # ordinary (single parent) diff
2066                 if ($line =~ m!^--- "?a/!) {
2067                         if ($from->{'href'}) {
2068                                 $line = '--- a/' .
2069                                         $cgi->a({-href=>$from->{'href'}, -class=>"path"},
2070                                                 esc_path($from->{'file'}));
2071                         } else {
2072                                 $line = '--- a/' .
2073                                         esc_path($from->{'file'});
2074                         }
2075                 }
2076                 $result .= qq!<div class="diff from_file">$line</div>\n!;
2077
2078         } else {
2079                 # combined diff (merge commit)
2080                 for (my $i = 0; $i < $diffinfo->{'nparents'}; $i++) {
2081                         if ($from->{'href'}[$i]) {
2082                                 $line = '--- ' .
2083                                         $cgi->a({-href=>href(action=>"blobdiff",
2084                                                              hash_parent=>$diffinfo->{'from_id'}[$i],
2085                                                              hash_parent_base=>$parents[$i],
2086                                                              file_parent=>$from->{'file'}[$i],
2087                                                              hash=>$diffinfo->{'to_id'},
2088                                                              hash_base=>$hash,
2089                                                              file_name=>$to->{'file'}),
2090                                                  -class=>"path",
2091                                                  -title=>"diff" . ($i+1)},
2092                                                 $i+1) .
2093                                         '/' .
2094                                         $cgi->a({-href=>$from->{'href'}[$i], -class=>"path"},
2095                                                 esc_path($from->{'file'}[$i]));
2096                         } else {
2097                                 $line = '--- /dev/null';
2098                         }
2099                         $result .= qq!<div class="diff from_file">$line</div>\n!;
2100                 }
2101         }
2102
2103         $line = $to_line;
2104         #assert($line =~ m/^\+\+\+/) if DEBUG;
2105         # no extra formatting for "^+++ /dev/null"
2106         if ($line =~ m!^\+\+\+ "?b/!) {
2107                 if ($to->{'href'}) {
2108                         $line = '+++ b/' .
2109                                 $cgi->a({-href=>$to->{'href'}, -class=>"path"},
2110                                         esc_path($to->{'file'}));
2111                 } else {
2112                         $line = '+++ b/' .
2113                                 esc_path($to->{'file'});
2114                 }
2115         }
2116         $result .= qq!<div class="diff to_file">$line</div>\n!;
2117
2118         return $result;
2119 }
2120
2121 # create note for patch simplified by combined diff
2122 sub format_diff_cc_simplified {
2123         my ($diffinfo, @parents) = @_;
2124         my $result = '';
2125
2126         $result .= "<div class=\"diff header\">" .
2127                    "diff --cc ";
2128         if (!is_deleted($diffinfo)) {
2129                 $result .= $cgi->a({-href => href(action=>"blob",
2130                                                   hash_base=>$hash,
2131                                                   hash=>$diffinfo->{'to_id'},
2132                                                   file_name=>$diffinfo->{'to_file'}),
2133                                     -class => "path"},
2134                                    esc_path($diffinfo->{'to_file'}));
2135         } else {
2136                 $result .= esc_path($diffinfo->{'to_file'});
2137         }
2138         $result .= "</div>\n" . # class="diff header"
2139                    "<div class=\"diff nodifferences\">" .
2140                    "Simple merge" .
2141                    "</div>\n"; # class="diff nodifferences"
2142
2143         return $result;
2144 }
2145
2146 # format patch (diff) line (not to be used for diff headers)
2147 sub format_diff_line {
2148         my $line = shift;
2149         my ($from, $to) = @_;
2150         my $diff_class = "";
2151
2152         chomp $line;
2153
2154         if ($from && $to && ref($from->{'href'}) eq "ARRAY") {
2155                 # combined diff
2156                 my $prefix = substr($line, 0, scalar @{$from->{'href'}});
2157                 if ($line =~ m/^\@{3}/) {
2158                         $diff_class = " chunk_header";
2159                 } elsif ($line =~ m/^\\/) {
2160                         $diff_class = " incomplete";
2161                 } elsif ($prefix =~ tr/+/+/) {
2162                         $diff_class = " add";
2163                 } elsif ($prefix =~ tr/-/-/) {
2164                         $diff_class = " rem";
2165                 }
2166         } else {
2167                 # assume ordinary diff
2168                 my $char = substr($line, 0, 1);
2169                 if ($char eq '+') {
2170                         $diff_class = " add";
2171                 } elsif ($char eq '-') {
2172                         $diff_class = " rem";
2173                 } elsif ($char eq '@') {
2174                         $diff_class = " chunk_header";
2175                 } elsif ($char eq "\\") {
2176                         $diff_class = " incomplete";
2177                 }
2178         }
2179         $line = untabify($line);
2180         if ($from && $to && $line =~ m/^\@{2} /) {
2181                 my ($from_text, $from_start, $from_lines, $to_text, $to_start, $to_lines, $section) =
2182                         $line =~ m/^\@{2} (-(\d+)(?:,(\d+))?) (\+(\d+)(?:,(\d+))?) \@{2}(.*)$/;
2183
2184                 $from_lines = 0 unless defined $from_lines;
2185                 $to_lines   = 0 unless defined $to_lines;
2186
2187                 if ($from->{'href'}) {
2188                         $from_text = $cgi->a({-href=>"$from->{'href'}#l$from_start",
2189                                              -class=>"list"}, $from_text);
2190                 }
2191                 if ($to->{'href'}) {
2192                         $to_text   = $cgi->a({-href=>"$to->{'href'}#l$to_start",
2193                                              -class=>"list"}, $to_text);
2194                 }
2195                 $line = "<span class=\"chunk_info\">@@ $from_text $to_text @@</span>" .
2196                         "<span class=\"section\">" . esc_html($section, -nbsp=>1) . "</span>";
2197                 return "<div class=\"diff$diff_class\">$line</div>\n";
2198         } elsif ($from && $to && $line =~ m/^\@{3}/) {
2199                 my ($prefix, $ranges, $section) = $line =~ m/^(\@+) (.*?) \@+(.*)$/;
2200                 my (@from_text, @from_start, @from_nlines, $to_text, $to_start, $to_nlines);
2201
2202                 @from_text = split(' ', $ranges);
2203                 for (my $i = 0; $i < @from_text; ++$i) {
2204                         ($from_start[$i], $from_nlines[$i]) =
2205                                 (split(',', substr($from_text[$i], 1)), 0);
2206                 }
2207
2208                 $to_text   = pop @from_text;
2209                 $to_start  = pop @from_start;
2210                 $to_nlines = pop @from_nlines;
2211
2212                 $line = "<span class=\"chunk_info\">$prefix ";
2213                 for (my $i = 0; $i < @from_text; ++$i) {
2214                         if ($from->{'href'}[$i]) {
2215                                 $line .= $cgi->a({-href=>"$from->{'href'}[$i]#l$from_start[$i]",
2216                                                   -class=>"list"}, $from_text[$i]);
2217                         } else {
2218                                 $line .= $from_text[$i];
2219                         }
2220                         $line .= " ";
2221                 }
2222                 if ($to->{'href'}) {
2223                         $line .= $cgi->a({-href=>"$to->{'href'}#l$to_start",
2224                                           -class=>"list"}, $to_text);
2225                 } else {
2226                         $line .= $to_text;
2227                 }
2228                 $line .= " $prefix</span>" .
2229                          "<span class=\"section\">" . esc_html($section, -nbsp=>1) . "</span>";
2230                 return "<div class=\"diff$diff_class\">$line</div>\n";
2231         }
2232         return "<div class=\"diff$diff_class\">" . esc_html($line, -nbsp=>1) . "</div>\n";
2233 }
2234
2235 # Generates undef or something like "_snapshot_" or "snapshot (_tbz2_ _zip_)",
2236 # linked.  Pass the hash of the tree/commit to snapshot.
2237 sub format_snapshot_links {
2238         my ($hash) = @_;
2239         my $num_fmts = @snapshot_fmts;
2240         if ($num_fmts > 1) {
2241                 # A parenthesized list of links bearing format names.
2242                 # e.g. "snapshot (_tar.gz_ _zip_)"
2243                 return "snapshot (" . join(' ', map
2244                         $cgi->a({
2245                                 -href => href(
2246                                         action=>"snapshot",
2247                                         hash=>$hash,
2248                                         snapshot_format=>$_
2249                                 )
2250                         }, $known_snapshot_formats{$_}{'display'})
2251                 , @snapshot_fmts) . ")";
2252         } elsif ($num_fmts == 1) {
2253                 # A single "snapshot" link whose tooltip bears the format name.
2254                 # i.e. "_snapshot_"
2255                 my ($fmt) = @snapshot_fmts;
2256                 return
2257                         $cgi->a({
2258                                 -href => href(
2259                                         action=>"snapshot",
2260                                         hash=>$hash,
2261                                         snapshot_format=>$fmt
2262                                 ),
2263                                 -title => "in format: $known_snapshot_formats{$fmt}{'display'}"
2264                         }, "snapshot");
2265         } else { # $num_fmts == 0
2266                 return undef;
2267         }
2268 }
2269
2270 ## ......................................................................
2271 ## functions returning values to be passed, perhaps after some
2272 ## transformation, to other functions; e.g. returning arguments to href()
2273
2274 # returns hash to be passed to href to generate gitweb URL
2275 # in -title key it returns description of link
2276 sub get_feed_info {
2277         my $format = shift || 'Atom';
2278         my %res = (action => lc($format));
2279
2280         # feed links are possible only for project views
2281         return unless (defined $project);
2282         # some views should link to OPML, or to generic project feed,
2283         # or don't have specific feed yet (so they should use generic)
2284         return if ($action =~ /^(?:tags|heads|forks|tag|search)$/x);
2285
2286         my $branch;
2287         # branches refs uses 'refs/heads/' prefix (fullname) to differentiate
2288         # from tag links; this also makes possible to detect branch links
2289         if ((defined $hash_base && $hash_base =~ m!^refs/heads/(.*)$!) ||
2290             (defined $hash      && $hash      =~ m!^refs/heads/(.*)$!)) {
2291                 $branch = $1;
2292         }
2293         # find log type for feed description (title)
2294         my $type = 'log';
2295         if (defined $file_name) {
2296                 $type  = "history of $file_name";
2297                 $type .= "/" if ($action eq 'tree');
2298                 $type .= " on '$branch'" if (defined $branch);
2299         } else {
2300                 $type = "log of $branch" if (defined $branch);
2301         }
2302
2303         $res{-title} = $type;
2304         $res{'hash'} = (defined $branch ? "refs/heads/$branch" : undef);
2305         $res{'file_name'} = $file_name;
2306
2307         return %res;
2308 }
2309
2310 ## ----------------------------------------------------------------------
2311 ## git utility subroutines, invoking git commands
2312
2313 # returns path to the core git executable and the --git-dir parameter as list
2314 sub git_cmd {
2315         $number_of_git_cmds++;
2316         return $GIT, '--git-dir='.$git_dir;
2317 }
2318
2319 # quote the given arguments for passing them to the shell
2320 # quote_command("command", "arg 1", "arg with ' and ! characters")
2321 # => "'command' 'arg 1' 'arg with '\'' and '\!' characters'"
2322 # Try to avoid using this function wherever possible.
2323 sub quote_command {
2324         return join(' ',
2325                 map { my $a = $_; $a =~ s/(['!])/'\\$1'/g; "'$a'" } @_ );
2326 }
2327
2328 # get HEAD ref of given project as hash
2329 sub git_get_head_hash {
2330         return git_get_full_hash(shift, 'HEAD');
2331 }
2332
2333 sub git_get_full_hash {
2334         return git_get_hash(@_);
2335 }
2336
2337 sub git_get_short_hash {
2338         return git_get_hash(@_, '--short=7');
2339 }
2340
2341 sub git_get_hash {
2342         my ($project, $hash, @options) = @_;
2343         my $o_git_dir = $git_dir;
2344         my $retval = undef;
2345         $git_dir = "$projectroot/$project";
2346         if (open my $fd, '-|', git_cmd(), 'rev-parse',
2347             '--verify', '-q', @options, $hash) {
2348                 $retval = <$fd>;
2349                 chomp $retval if defined $retval;
2350                 close $fd;
2351         }
2352         if (defined $o_git_dir) {
2353                 $git_dir = $o_git_dir;
2354         }
2355         return $retval;
2356 }
2357
2358 # get type of given object
2359 sub git_get_type {
2360         my $hash = shift;
2361
2362         open my $fd, "-|", git_cmd(), "cat-file", '-t', $hash or return;
2363         my $type = <$fd>;
2364         close $fd or return;
2365         chomp $type;
2366         return $type;
2367 }
2368
2369 # repository configuration
2370 our $config_file = '';
2371 our %config;
2372
2373 # store multiple values for single key as anonymous array reference
2374 # single values stored directly in the hash, not as [ <value> ]
2375 sub hash_set_multi {
2376         my ($hash, $key, $value) = @_;
2377
2378         if (!exists $hash->{$key}) {
2379                 $hash->{$key} = $value;
2380         } elsif (!ref $hash->{$key}) {
2381                 $hash->{$key} = [ $hash->{$key}, $value ];
2382         } else {
2383                 push @{$hash->{$key}}, $value;
2384         }
2385 }
2386
2387 # return hash of git project configuration
2388 # optionally limited to some section, e.g. 'gitweb'
2389 sub git_parse_project_config {
2390         my $section_regexp = shift;
2391         my %config;
2392
2393         local $/ = "\0";
2394
2395         open my $fh, "-|", git_cmd(), "config", '-z', '-l',
2396                 or return;
2397
2398         while (my $keyval = <$fh>) {
2399                 chomp $keyval;
2400                 my ($key, $value) = split(/\n/, $keyval, 2);
2401
2402                 hash_set_multi(\%config, $key, $value)
2403                         if (!defined $section_regexp || $key =~ /^(?:$section_regexp)\./o);
2404         }
2405         close $fh;
2406
2407         return %config;
2408 }
2409
2410 # convert config value to boolean: 'true' or 'false'
2411 # no value, number > 0, 'true' and 'yes' values are true
2412 # rest of values are treated as false (never as error)
2413 sub config_to_bool {
2414         my $val = shift;
2415
2416         return 1 if !defined $val;             # section.key
2417
2418         # strip leading and trailing whitespace
2419         $val =~ s/^\s+//;
2420         $val =~ s/\s+$//;
2421
2422         return (($val =~ /^\d+$/ && $val) ||   # section.key = 1
2423                 ($val =~ /^(?:true|yes)$/i));  # section.key = true
2424 }
2425
2426 # convert config value to simple decimal number
2427 # an optional value suffix of 'k', 'm', or 'g' will cause the value
2428 # to be multiplied by 1024, 1048576, or 1073741824
2429 sub config_to_int {
2430         my $val = shift;
2431
2432         # strip leading and trailing whitespace
2433         $val =~ s/^\s+//;
2434         $val =~ s/\s+$//;
2435
2436         if (my ($num, $unit) = ($val =~ /^([0-9]*)([kmg])$/i)) {
2437                 $unit = lc($unit);
2438                 # unknown unit is treated as 1
2439                 return $num * ($unit eq 'g' ? 1073741824 :
2440                                $unit eq 'm' ?    1048576 :
2441                                $unit eq 'k' ?       1024 : 1);
2442         }
2443         return $val;
2444 }
2445
2446 # convert config value to array reference, if needed
2447 sub config_to_multi {
2448         my $val = shift;
2449
2450         return ref($val) ? $val : (defined($val) ? [ $val ] : []);
2451 }
2452
2453 sub git_get_project_config {
2454         my ($key, $type) = @_;
2455
2456         return unless defined $git_dir;
2457
2458         # key sanity check
2459         return unless ($key);
2460         $key =~ s/^gitweb\.//;
2461         return if ($key =~ m/\W/);
2462
2463         # type sanity check
2464         if (defined $type) {
2465                 $type =~ s/^--//;
2466                 $type = undef
2467                         unless ($type eq 'bool' || $type eq 'int');
2468         }
2469
2470         # get config
2471         if (!defined $config_file ||
2472             $config_file ne "$git_dir/config") {
2473                 %config = git_parse_project_config('gitweb');
2474                 $config_file = "$git_dir/config";
2475         }
2476
2477         # check if config variable (key) exists
2478         return unless exists $config{"gitweb.$key"};
2479
2480         # ensure given type
2481         if (!defined $type) {
2482                 return $config{"gitweb.$key"};
2483         } elsif ($type eq 'bool') {
2484                 # backward compatibility: 'git config --bool' returns true/false
2485                 return config_to_bool($config{"gitweb.$key"}) ? 'true' : 'false';
2486         } elsif ($type eq 'int') {
2487                 return config_to_int($config{"gitweb.$key"});
2488         }
2489         return $config{"gitweb.$key"};
2490 }
2491
2492 # get hash of given path at given ref
2493 sub git_get_hash_by_path {
2494         my $base = shift;
2495         my $path = shift || return undef;
2496         my $type = shift;
2497
2498         $path =~ s,/+$,,;
2499
2500         open my $fd, "-|", git_cmd(), "ls-tree", $base, "--", $path
2501                 or die_error(500, "Open git-ls-tree failed");
2502         my $line = <$fd>;
2503         close $fd or return undef;
2504
2505         if (!defined $line) {
2506                 # there is no tree or hash given by $path at $base
2507                 return undef;
2508         }
2509
2510         #'100644 blob 0fa3f3a66fb6a137f6ec2c19351ed4d807070ffa  panic.c'
2511         $line =~ m/^([0-9]+) (.+) ([0-9a-fA-F]{40})\t/;
2512         if (defined $type && $type ne $2) {
2513                 # type doesn't match
2514                 return undef;
2515         }
2516         return $3;
2517 }
2518
2519 # get path of entry with given hash at given tree-ish (ref)
2520 # used to get 'from' filename for combined diff (merge commit) for renames
2521 sub git_get_path_by_hash {
2522         my $base = shift || return;
2523         my $hash = shift || return;
2524
2525         local $/ = "\0";
2526
2527         open my $fd, "-|", git_cmd(), "ls-tree", '-r', '-t', '-z', $base
2528                 or return undef;
2529         while (my $line = <$fd>) {
2530                 chomp $line;
2531
2532                 #'040000 tree 595596a6a9117ddba9fe379b6b012b558bac8423  gitweb'
2533                 #'100644 blob e02e90f0429be0d2a69b76571101f20b8f75530f  gitweb/README'
2534                 if ($line =~ m/(?:[0-9]+) (?:.+) $hash\t(.+)$/) {
2535                         close $fd;
2536                         return $1;
2537                 }
2538         }
2539         close $fd;
2540         return undef;
2541 }
2542
2543 ## ......................................................................
2544 ## git utility functions, directly accessing git repository
2545
2546 sub git_get_project_description {
2547         my $path = shift;
2548
2549         $git_dir = "$projectroot/$path";
2550         open my $fd, '<', "$git_dir/description"
2551                 or return git_get_project_config('description');
2552         my $descr = <$fd>;
2553         close $fd;
2554         if (defined $descr) {
2555                 chomp $descr;
2556         }
2557         return $descr;
2558 }
2559
2560 sub git_get_project_ctags {
2561         my $path = shift;
2562         my $ctags = {};
2563
2564         $git_dir = "$projectroot/$path";
2565         opendir my $dh, "$git_dir/ctags"
2566                 or return $ctags;
2567         foreach (grep { -f $_ } map { "$git_dir/ctags/$_" } readdir($dh)) {
2568                 open my $ct, '<', $_ or next;
2569                 my $val = <$ct>;
2570                 chomp $val;
2571                 close $ct;
2572                 my $ctag = $_; $ctag =~ s#.*/##;
2573                 $ctags->{$ctag} = $val;
2574         }
2575         closedir $dh;
2576         $ctags;
2577 }
2578
2579 sub git_populate_project_tagcloud {
2580         my $ctags = shift;
2581
2582         # First, merge different-cased tags; tags vote on casing
2583         my %ctags_lc;
2584         foreach (keys %$ctags) {
2585                 $ctags_lc{lc $_}->{count} += $ctags->{$_};
2586                 if (not $ctags_lc{lc $_}->{topcount}
2587                     or $ctags_lc{lc $_}->{topcount} < $ctags->{$_}) {
2588                         $ctags_lc{lc $_}->{topcount} = $ctags->{$_};
2589                         $ctags_lc{lc $_}->{topname} = $_;
2590                 }
2591         }
2592
2593         my $cloud;
2594         if (eval { require HTML::TagCloud; 1; }) {
2595                 $cloud = HTML::TagCloud->new;
2596                 foreach (sort keys %ctags_lc) {
2597                         # Pad the title with spaces so that the cloud looks
2598                         # less crammed.
2599                         my $title = $ctags_lc{$_}->{topname};
2600                         $title =~ s/ /&nbsp;/g;
2601                         $title =~ s/^/&nbsp;/g;
2602                         $title =~ s/$/&nbsp;/g;
2603                         $cloud->add($title, $home_link."?by_tag=".$_, $ctags_lc{$_}->{count});
2604                 }
2605         } else {
2606                 $cloud = \%ctags_lc;
2607         }
2608         $cloud;
2609 }
2610
2611 sub git_show_project_tagcloud {
2612         my ($cloud, $count) = @_;
2613         print STDERR ref($cloud)."..\n";
2614         if (ref $cloud eq 'HTML::TagCloud') {
2615                 return $cloud->html_and_css($count);
2616         } else {
2617                 my @tags = sort { $cloud->{$a}->{count} <=> $cloud->{$b}->{count} } keys %$cloud;
2618                 return '<p align="center">' . join (', ', map {
2619                         "<a href=\"$home_link?by_tag=$_\">$cloud->{$_}->{topname}</a>"
2620                 } splice(@tags, 0, $count)) . '</p>';
2621         }
2622 }
2623
2624 sub git_get_project_url_list {
2625         my $path = shift;
2626
2627         $git_dir = "$projectroot/$path";
2628         open my $fd, '<', "$git_dir/cloneurl"
2629                 or return wantarray ?
2630                 @{ config_to_multi(git_get_project_config('url')) } :
2631                    config_to_multi(git_get_project_config('url'));
2632         my @git_project_url_list = map { chomp; $_ } <$fd>;
2633         close $fd;
2634
2635         return wantarray ? @git_project_url_list : \@git_project_url_list;
2636 }
2637
2638 sub git_get_projects_list {
2639         my ($filter) = @_;
2640         my @list;
2641
2642         $filter ||= '';
2643         $filter =~ s/\.git$//;
2644
2645         my $check_forks = gitweb_check_feature('forks');
2646
2647         if (-d $projects_list) {
2648                 # search in directory
2649                 my $dir = $projects_list . ($filter ? "/$filter" : '');
2650                 # remove the trailing "/"
2651                 $dir =~ s!/+$!!;
2652                 my $pfxlen = length("$dir");
2653                 my $pfxdepth = ($dir =~ tr!/!!);
2654
2655                 File::Find::find({
2656                         follow_fast => 1, # follow symbolic links
2657                         follow_skip => 2, # ignore duplicates
2658                         dangling_symlinks => 0, # ignore dangling symlinks, silently
2659                         wanted => sub {
2660                                 # global variables
2661                                 our $project_maxdepth;
2662                                 our $projectroot;
2663                                 # skip project-list toplevel, if we get it.
2664                                 return if (m!^[/.]$!);
2665                                 # only directories can be git repositories
2666                                 return unless (-d $_);
2667                                 # don't traverse too deep (Find is super slow on os x)
2668                                 if (($File::Find::name =~ tr!/!!) - $pfxdepth > $project_maxdepth) {
2669                                         $File::Find::prune = 1;
2670                                         return;
2671                                 }
2672
2673                                 my $subdir = substr($File::Find::name, $pfxlen + 1);
2674                                 # we check related file in $projectroot
2675                                 my $path = ($filter ? "$filter/" : '') . $subdir;
2676                                 if (check_export_ok("$projectroot/$path")) {
2677                                         push @list, { path => $path };
2678                                         $File::Find::prune = 1;
2679                                 }
2680                         },
2681                 }, "$dir");
2682
2683         } elsif (-f $projects_list) {
2684                 # read from file(url-encoded):
2685                 # 'git%2Fgit.git Linus+Torvalds'
2686                 # 'libs%2Fklibc%2Fklibc.git H.+Peter+Anvin'
2687                 # 'linux%2Fhotplug%2Fudev.git Greg+Kroah-Hartman'
2688                 my %paths;
2689                 open my $fd, '<', $projects_list or return;
2690         PROJECT:
2691                 while (my $line = <$fd>) {
2692                         chomp $line;
2693                         my ($path, $owner) = split ' ', $line;
2694                         $path = unescape($path);
2695                         $owner = unescape($owner);
2696                         if (!defined $path) {
2697                                 next;
2698                         }
2699                         if ($filter ne '') {
2700                                 # looking for forks;
2701                                 my $pfx = substr($path, 0, length($filter));
2702                                 if ($pfx ne $filter) {
2703                                         next PROJECT;
2704                                 }
2705                                 my $sfx = substr($path, length($filter));
2706                                 if ($sfx !~ /^\/.*\.git$/) {
2707                                         next PROJECT;
2708                                 }
2709                         } elsif ($check_forks) {
2710                         PATH:
2711                                 foreach my $filter (keys %paths) {
2712                                         # looking for forks;
2713                                         my $pfx = substr($path, 0, length($filter));
2714                                         if ($pfx ne $filter) {
2715                                                 next PATH;
2716                                         }
2717                                         my $sfx = substr($path, length($filter));
2718                                         if ($sfx !~ /^\/.*\.git$/) {
2719                                                 next PATH;
2720                                         }
2721                                         # is a fork, don't include it in
2722                                         # the list
2723                                         next PROJECT;
2724                                 }
2725                         }
2726                         if (check_export_ok("$projectroot/$path")) {
2727                                 my $pr = {
2728                                         path => $path,
2729                                         owner => to_utf8($owner),
2730                                 };
2731                                 push @list, $pr;
2732                                 (my $forks_path = $path) =~ s/\.git$//;
2733                                 $paths{$forks_path}++;
2734                         }
2735                 }
2736                 close $fd;
2737         }
2738         return @list;
2739 }
2740
2741 our $gitweb_project_owner = undef;
2742 sub git_get_project_list_from_file {
2743
2744         return if (defined $gitweb_project_owner);
2745
2746         $gitweb_project_owner = {};
2747         # read from file (url-encoded):
2748         # 'git%2Fgit.git Linus+Torvalds'
2749         # 'libs%2Fklibc%2Fklibc.git H.+Peter+Anvin'
2750         # 'linux%2Fhotplug%2Fudev.git Greg+Kroah-Hartman'
2751         if (-f $projects_list) {
2752                 open(my $fd, '<', $projects_list);
2753                 while (my $line = <$fd>) {
2754                         chomp $line;
2755                         my ($pr, $ow) = split ' ', $line;
2756                         $pr = unescape($pr);
2757                         $ow = unescape($ow);
2758                         $gitweb_project_owner->{$pr} = to_utf8($ow);
2759                 }
2760                 close $fd;
2761         }
2762 }
2763
2764 sub git_get_project_owner {
2765         my $project = shift;
2766         my $owner;
2767
2768         return undef unless $project;
2769         $git_dir = "$projectroot/$project";
2770
2771         if (!defined $gitweb_project_owner) {
2772                 git_get_project_list_from_file();
2773         }
2774
2775         if (exists $gitweb_project_owner->{$project}) {
2776                 $owner = $gitweb_project_owner->{$project};
2777         }
2778         if (!defined $owner){
2779                 $owner = git_get_project_config('owner');
2780         }
2781         if (!defined $owner) {
2782                 $owner = get_file_owner("$git_dir");
2783         }
2784
2785         return $owner;
2786 }
2787
2788 sub git_get_last_activity {
2789         my ($path) = @_;
2790         my $fd;
2791
2792         $git_dir = "$projectroot/$path";
2793         open($fd, "-|", git_cmd(), 'for-each-ref',
2794              '--format=%(committer)',
2795              '--sort=-committerdate',
2796              '--count=1',
2797              'refs/heads') or return;
2798         my $most_recent = <$fd>;
2799         close $fd or return;
2800         if (defined $most_recent &&
2801             $most_recent =~ / (\d+) [-+][01]\d\d\d$/) {
2802                 my $timestamp = $1;
2803                 my $age = time - $timestamp;
2804                 return ($age, age_string($age));
2805         }
2806         return (undef, undef);
2807 }
2808
2809 # Implementation note: when a single remote is wanted, we cannot use 'git
2810 # remote show -n' because that command always work (assuming it's a remote URL
2811 # if it's not defined), and we cannot use 'git remote show' because that would
2812 # try to make a network roundtrip. So the only way to find if that particular
2813 # remote is defined is to walk the list provided by 'git remote -v' and stop if
2814 # and when we find what we want.
2815 sub git_get_remotes_list {
2816         my $wanted = shift;
2817         my %remotes = ();
2818
2819         open my $fd, '-|' , git_cmd(), 'remote', '-v';
2820         return unless $fd;
2821         while (my $remote = <$fd>) {
2822                 chomp $remote;
2823                 $remote =~ s!\t(.*?)\s+\((\w+)\)$!!;
2824                 next if $wanted and not $remote eq $wanted;
2825                 my ($url, $key) = ($1, $2);
2826
2827                 $remotes{$remote} ||= { 'heads' => () };
2828                 $remotes{$remote}{$key} = $url;
2829         }
2830         close $fd or return;
2831         return wantarray ? %remotes : \%remotes;
2832 }
2833
2834 # Takes a hash of remotes as first parameter and fills it by adding the
2835 # available remote heads for each of the indicated remotes.
2836 sub fill_remote_heads {
2837         my $remotes = shift;
2838         my @heads = map { "remotes/$_" } keys %$remotes;
2839         my @remoteheads = git_get_heads_list(undef, @heads);
2840         foreach my $remote (keys %$remotes) {
2841                 $remotes->{$remote}{'heads'} = [ grep {
2842                         $_->{'name'} =~ s!^$remote/!!
2843                         } @remoteheads ];
2844         }
2845 }
2846
2847 sub git_get_references {
2848         my $type = shift || "";
2849         my %refs;
2850         # 5dc01c595e6c6ec9ccda4f6f69c131c0dd945f8c refs/tags/v2.6.11
2851         # c39ae07f393806ccf406ef966e9a15afc43cc36a refs/tags/v2.6.11^{}
2852         open my $fd, "-|", git_cmd(), "show-ref", "--dereference",
2853                 ($type ? ("--", "refs/$type") : ()) # use -- <pattern> if $type
2854                 or return;
2855
2856         while (my $line = <$fd>) {
2857                 chomp $line;
2858                 if ($line =~ m!^([0-9a-fA-F]{40})\srefs/($type.*)$!) {
2859                         if (defined $refs{$1}) {
2860                                 push @{$refs{$1}}, $2;
2861                         } else {
2862                                 $refs{$1} = [ $2 ];
2863                         }
2864                 }
2865         }
2866         close $fd or return;
2867         return \%refs;
2868 }
2869
2870 sub git_get_rev_name_tags {
2871         my $hash = shift || return undef;
2872
2873         open my $fd, "-|", git_cmd(), "name-rev", "--tags", $hash
2874                 or return;
2875         my $name_rev = <$fd>;
2876         close $fd;
2877
2878         if ($name_rev =~ m|^$hash tags/(.*)$|) {
2879                 return $1;
2880         } else {
2881                 # catches also '$hash undefined' output
2882                 return undef;
2883         }
2884 }
2885
2886 ## ----------------------------------------------------------------------
2887 ## parse to hash functions
2888
2889 sub parse_date {
2890         my $epoch = shift;
2891         my $tz = shift || "-0000";
2892
2893         my %date;
2894         my @months = ("Jan", "Feb", "Mar", "Apr", "May", "Jun", "Jul", "Aug", "Sep", "Oct", "Nov", "Dec");
2895         my @days = ("Sun", "Mon", "Tue", "Wed", "Thu", "Fri", "Sat");
2896         my ($sec, $min, $hour, $mday, $mon, $year, $wday, $yday) = gmtime($epoch);
2897         $date{'hour'} = $hour;
2898         $date{'minute'} = $min;
2899         $date{'mday'} = $mday;
2900         $date{'day'} = $days[$wday];
2901         $date{'month'} = $months[$mon];
2902         $date{'rfc2822'}   = sprintf "%s, %d %s %4d %02d:%02d:%02d +0000",
2903                              $days[$wday], $mday, $months[$mon], 1900+$year, $hour ,$min, $sec;
2904         $date{'mday-time'} = sprintf "%d %s %02d:%02d",
2905                              $mday, $months[$mon], $hour ,$min;
2906         $date{'iso-8601'}  = sprintf "%04d-%02d-%02dT%02d:%02d:%02dZ",
2907                              1900+$year, 1+$mon, $mday, $hour ,$min, $sec;
2908
2909         $tz =~ m/^([+\-][0-9][0-9])([0-9][0-9])$/;
2910         my $local = $epoch + ((int $1 + ($2/60)) * 3600);
2911         ($sec, $min, $hour, $mday, $mon, $year, $wday, $yday) = gmtime($local);
2912         $date{'hour_local'} = $hour;
2913         $date{'minute_local'} = $min;
2914         $date{'tz_local'} = $tz;
2915         $date{'iso-tz'} = sprintf("%04d-%02d-%02d %02d:%02d:%02d %s",
2916                                   1900+$year, $mon+1, $mday,
2917                                   $hour, $min, $sec, $tz);
2918         return %date;
2919 }
2920
2921 sub parse_tag {
2922         my $tag_id = shift;
2923         my %tag;
2924         my @comment;
2925
2926         open my $fd, "-|", git_cmd(), "cat-file", "tag", $tag_id or return;
2927         $tag{'id'} = $tag_id;
2928         while (my $line = <$fd>) {
2929                 chomp $line;
2930                 if ($line =~ m/^object ([0-9a-fA-F]{40})$/) {
2931                         $tag{'object'} = $1;
2932                 } elsif ($line =~ m/^type (.+)$/) {
2933                         $tag{'type'} = $1;
2934                 } elsif ($line =~ m/^tag (.+)$/) {
2935                         $tag{'name'} = $1;
2936                 } elsif ($line =~ m/^tagger (.*) ([0-9]+) (.*)$/) {
2937                         $tag{'author'} = $1;
2938                         $tag{'author_epoch'} = $2;
2939                         $tag{'author_tz'} = $3;
2940                         if ($tag{'author'} =~ m/^([^<]+) <([^>]*)>/) {
2941                                 $tag{'author_name'}  = $1;
2942                                 $tag{'author_email'} = $2;
2943                         } else {
2944                                 $tag{'author_name'} = $tag{'author'};
2945                         }
2946                 } elsif ($line =~ m/--BEGIN/) {
2947                         push @comment, $line;
2948                         last;
2949                 } elsif ($line eq "") {
2950                         last;
2951                 }
2952         }
2953         push @comment, <$fd>;
2954         $tag{'comment'} = \@comment;
2955         close $fd or return;
2956         if (!defined $tag{'name'}) {
2957                 return
2958         };
2959         return %tag
2960 }
2961
2962 sub parse_commit_text {
2963         my ($commit_text, $withparents) = @_;
2964         my @commit_lines = split '\n', $commit_text;
2965         my %co;
2966
2967         pop @commit_lines; # Remove '\0'
2968
2969         if (! @commit_lines) {
2970                 return;
2971         }
2972
2973         my $header = shift @commit_lines;
2974         if ($header !~ m/^[0-9a-fA-F]{40}/) {
2975                 return;
2976         }
2977         ($co{'id'}, my @parents) = split ' ', $header;
2978         while (my $line = shift @commit_lines) {
2979                 last if $line eq "\n";
2980                 if ($line =~ m/^tree ([0-9a-fA-F]{40})$/) {
2981                         $co{'tree'} = $1;
2982                 } elsif ((!defined $withparents) && ($line =~ m/^parent ([0-9a-fA-F]{40})$/)) {
2983                         push @parents, $1;
2984                 } elsif ($line =~ m/^author (.*) ([0-9]+) (.*)$/) {
2985                         $co{'author'} = to_utf8($1);
2986                         $co{'author_epoch'} = $2;
2987                         $co{'author_tz'} = $3;
2988                         if ($co{'author'} =~ m/^([^<]+) <([^>]*)>/) {
2989                                 $co{'author_name'}  = $1;
2990                                 $co{'author_email'} = $2;
2991                         } else {
2992                                 $co{'author_name'} = $co{'author'};
2993                         }
2994                 } elsif ($line =~ m/^committer (.*) ([0-9]+) (.*)$/) {
2995                         $co{'committer'} = to_utf8($1);
2996                         $co{'committer_epoch'} = $2;
2997                         $co{'committer_tz'} = $3;
2998                         if ($co{'committer'} =~ m/^([^<]+) <([^>]*)>/) {
2999                                 $co{'committer_name'}  = $1;
3000                                 $co{'committer_email'} = $2;
3001                         } else {
3002                                 $co{'committer_name'} = $co{'committer'};
3003                         }
3004                 }
3005         }
3006         if (!defined $co{'tree'}) {
3007                 return;
3008         };
3009         $co{'parents'} = \@parents;
3010         $co{'parent'} = $parents[0];
3011
3012         foreach my $title (@commit_lines) {
3013                 $title =~ s/^    //;
3014                 if ($title ne "") {
3015                         $co{'title'} = chop_str($title, 80, 5);
3016                         # remove leading stuff of merges to make the interesting part visible
3017                         if (length($title) > 50) {
3018                                 $title =~ s/^Automatic //;
3019                                 $title =~ s/^merge (of|with) /Merge ... /i;
3020                                 if (length($title) > 50) {
3021                                         $title =~ s/(http|rsync):\/\///;
3022                                 }
3023                                 if (length($title) > 50) {
3024                                         $title =~ s/(master|www|rsync)\.//;
3025                                 }
3026                                 if (length($title) > 50) {
3027                                         $title =~ s/kernel.org:?//;
3028                                 }
3029                                 if (length($title) > 50) {
3030                                         $title =~ s/\/pub\/scm//;
3031                                 }
3032                         }
3033                         $co{'title_short'} = chop_str($title, 50, 5);
3034                         last;
3035                 }
3036         }
3037         if (! defined $co{'title'} || $co{'title'} eq "") {
3038                 $co{'title'} = $co{'title_short'} = '(no commit message)';
3039         }
3040         # remove added spaces
3041         foreach my $line (@commit_lines) {
3042                 $line =~ s/^    //;
3043         }
3044         $co{'comment'} = \@commit_lines;
3045
3046         my $age = time - $co{'committer_epoch'};
3047         $co{'age'} = $age;
3048         $co{'age_string'} = age_string($age);
3049         my ($sec, $min, $hour, $mday, $mon, $year, $wday, $yday) = gmtime($co{'committer_epoch'});
3050         if ($age > 60*60*24*7*2) {
3051                 $co{'age_string_date'} = sprintf "%4i-%02u-%02i", 1900 + $year, $mon+1, $mday;
3052                 $co{'age_string_age'} = $co{'age_string'};
3053         } else {
3054                 $co{'age_string_date'} = $co{'age_string'};
3055                 $co{'age_string_age'} = sprintf "%4i-%02u-%02i", 1900 + $year, $mon+1, $mday;
3056         }
3057         return %co;
3058 }
3059
3060 sub parse_commit {
3061         my ($commit_id) = @_;
3062         my %co;
3063
3064         local $/ = "\0";
3065
3066         open my $fd, "-|", git_cmd(), "rev-list",
3067                 "--parents",
3068                 "--header",
3069                 "--max-count=1",
3070                 $commit_id,
3071                 "--",
3072                 or die_error(500, "Open git-rev-list failed");
3073         %co = parse_commit_text(<$fd>, 1);
3074         close $fd;
3075
3076         return %co;
3077 }
3078
3079 sub parse_commits {
3080         my ($commit_id, $maxcount, $skip, $filename, @args) = @_;
3081         my @cos;
3082
3083         $maxcount ||= 1;
3084         $skip ||= 0;
3085
3086         local $/ = "\0";
3087
3088         open my $fd, "-|", git_cmd(), "rev-list",
3089                 "--header",
3090                 @args,
3091                 ("--max-count=" . $maxcount),
3092                 ("--skip=" . $skip),
3093                 @extra_options,
3094                 $commit_id,
3095                 "--",
3096                 ($filename ? ($filename) : ())
3097                 or die_error(500, "Open git-rev-list failed");
3098         while (my $line = <$fd>) {
3099                 my %co = parse_commit_text($line);
3100                 push @cos, \%co;
3101         }
3102         close $fd;
3103
3104         return wantarray ? @cos : \@cos;
3105 }
3106
3107 # parse line of git-diff-tree "raw" output
3108 sub parse_difftree_raw_line {
3109         my $line = shift;
3110         my %res;
3111
3112         # ':100644 100644 03b218260e99b78c6df0ed378e59ed9205ccc96d 3b93d5e7cc7f7dd4ebed13a5cc1a4ad976fc94d8 M   ls-files.c'
3113         # ':100644 100644 7f9281985086971d3877aca27704f2aaf9c448ce bc190ebc71bbd923f2b728e505408f5e54bd073a M   rev-tree.c'
3114         if ($line =~ m/^:([0-7]{6}) ([0-7]{6}) ([0-9a-fA-F]{40}) ([0-9a-fA-F]{40}) (.)([0-9]{0,3})\t(.*)$/) {
3115                 $res{'from_mode'} = $1;
3116                 $res{'to_mode'} = $2;
3117                 $res{'from_id'} = $3;
3118                 $res{'to_id'} = $4;
3119                 $res{'status'} = $5;
3120                 $res{'similarity'} = $6;
3121                 if ($res{'status'} eq 'R' || $res{'status'} eq 'C') { # renamed or copied
3122                         ($res{'from_file'}, $res{'to_file'}) = map { unquote($_) } split("\t", $7);
3123                 } else {
3124                         $res{'from_file'} = $res{'to_file'} = $res{'file'} = unquote($7);
3125                 }
3126         }
3127         # '::100755 100755 100755 60e79ca1b01bc8b057abe17ddab484699a7f5fdb 94067cc5f73388f33722d52ae02f44692bc07490 94067cc5f73388f33722d52ae02f44692bc07490 MR git-gui/git-gui.sh'
3128         # combined diff (for merge commit)
3129         elsif ($line =~ s/^(::+)((?:[0-7]{6} )+)((?:[0-9a-fA-F]{40} )+)([a-zA-Z]+)\t(.*)$//) {
3130                 $res{'nparents'}  = length($1);
3131                 $res{'from_mode'} = [ split(' ', $2) ];
3132                 $res{'to_mode'} = pop @{$res{'from_mode'}};
3133                 $res{'from_id'} = [ split(' ', $3) ];
3134                 $res{'to_id'} = pop @{$res{'from_id'}};
3135                 $res{'status'} = [ split('', $4) ];
3136                 $res{'to_file'} = unquote($5);
3137         }
3138         # 'c512b523472485aef4fff9e57b229d9d243c967f'
3139         elsif ($line =~ m/^([0-9a-fA-F]{40})$/) {
3140                 $res{'commit'} = $1;
3141         }
3142
3143         return wantarray ? %res : \%res;
3144 }
3145
3146 # wrapper: return parsed line of git-diff-tree "raw" output
3147 # (the argument might be raw line, or parsed info)
3148 sub parsed_difftree_line {
3149         my $line_or_ref = shift;
3150
3151         if (ref($line_or_ref) eq "HASH") {
3152                 # pre-parsed (or generated by hand)
3153                 return $line_or_ref;
3154         } else {
3155                 return parse_difftree_raw_line($line_or_ref);
3156         }
3157 }
3158
3159 # parse line of git-ls-tree output
3160 sub parse_ls_tree_line {
3161         my $line = shift;
3162         my %opts = @_;
3163         my %res;
3164
3165         if ($opts{'-l'}) {
3166                 #'100644 blob 0fa3f3a66fb6a137f6ec2c19351ed4d807070ffa   16717  panic.c'
3167                 $line =~ m/^([0-9]+) (.+) ([0-9a-fA-F]{40}) +(-|[0-9]+)\t(.+)$/s;
3168
3169                 $res{'mode'} = $1;
3170                 $res{'type'} = $2;
3171                 $res{'hash'} = $3;
3172                 $res{'size'} = $4;
3173                 if ($opts{'-z'}) {
3174                         $res{'name'} = $5;
3175                 } else {
3176                         $res{'name'} = unquote($5);
3177                 }
3178         } else {
3179                 #'100644 blob 0fa3f3a66fb6a137f6ec2c19351ed4d807070ffa  panic.c'
3180                 $line =~ m/^([0-9]+) (.+) ([0-9a-fA-F]{40})\t(.+)$/s;
3181
3182                 $res{'mode'} = $1;
3183                 $res{'type'} = $2;
3184                 $res{'hash'} = $3;
3185                 if ($opts{'-z'}) {
3186                         $res{'name'} = $4;
3187                 } else {
3188                         $res{'name'} = unquote($4);
3189                 }
3190         }
3191
3192         return wantarray ? %res : \%res;
3193 }
3194
3195 # generates _two_ hashes, references to which are passed as 2 and 3 argument
3196 sub parse_from_to_diffinfo {
3197         my ($diffinfo, $from, $to, @parents) = @_;
3198
3199         if ($diffinfo->{'nparents'}) {
3200                 # combined diff
3201                 $from->{'file'} = [];
3202                 $from->{'href'} = [];
3203                 fill_from_file_info($diffinfo, @parents)
3204                         unless exists $diffinfo->{'from_file'};
3205                 for (my $i = 0; $i < $diffinfo->{'nparents'}; $i++) {
3206                         $from->{'file'}[$i] =
3207                                 defined $diffinfo->{'from_file'}[$i] ?
3208                                         $diffinfo->{'from_file'}[$i] :
3209                                         $diffinfo->{'to_file'};
3210                         if ($diffinfo->{'status'}[$i] ne "A") { # not new (added) file
3211                                 $from->{'href'}[$i] = href(action=>"blob",
3212                                                            hash_base=>$parents[$i],
3213                                                            hash=>$diffinfo->{'from_id'}[$i],
3214                                                            file_name=>$from->{'file'}[$i]);
3215                         } else {
3216                                 $from->{'href'}[$i] = undef;
3217                         }
3218                 }
3219         } else {
3220                 # ordinary (not combined) diff
3221                 $from->{'file'} = $diffinfo->{'from_file'};
3222                 if ($diffinfo->{'status'} ne "A") { # not new (added) file
3223                         $from->{'href'} = href(action=>"blob", hash_base=>$hash_parent,
3224                                                hash=>$diffinfo->{'from_id'},
3225                                                file_name=>$from->{'file'});
3226                 } else {
3227                         delete $from->{'href'};
3228                 }
3229         }
3230
3231         $to->{'file'} = $diffinfo->{'to_file'};
3232         if (!is_deleted($diffinfo)) { # file exists in result
3233                 $to->{'href'} = href(action=>"blob", hash_base=>$hash,
3234                                      hash=>$diffinfo->{'to_id'},
3235                                      file_name=>$to->{'file'});
3236         } else {
3237                 delete $to->{'href'};
3238         }
3239 }
3240
3241 ## ......................................................................
3242 ## parse to array of hashes functions
3243
3244 sub git_get_heads_list {
3245         my ($limit, @classes) = @_;
3246         @classes = ('heads') unless @classes;
3247         my @patterns = map { "refs/$_" } @classes;
3248         my @headslist;
3249
3250         open my $fd, '-|', git_cmd(), 'for-each-ref',
3251                 ($limit ? '--count='.($limit+1) : ()), '--sort=-committerdate',
3252                 '--format=%(objectname) %(refname) %(subject)%00%(committer)',
3253                 @patterns
3254                 or return;
3255         while (my $line = <$fd>) {
3256                 my %ref_item;
3257
3258                 chomp $line;
3259                 my ($refinfo, $committerinfo) = split(/\0/, $line);
3260                 my ($hash, $name, $title) = split(' ', $refinfo, 3);
3261                 my ($committer, $epoch, $tz) =
3262                         ($committerinfo =~ /^(.*) ([0-9]+) (.*)$/);
3263                 $ref_item{'fullname'}  = $name;
3264                 $name =~ s!^refs/(?:head|remote)s/!!;
3265
3266                 $ref_item{'name'}  = $name;
3267                 $ref_item{'id'}    = $hash;
3268                 $ref_item{'title'} = $title || '(no commit message)';
3269                 $ref_item{'epoch'} = $epoch;
3270                 if ($epoch) {
3271                         $ref_item{'age'} = age_string(time - $ref_item{'epoch'});
3272                 } else {
3273                         $ref_item{'age'} = "unknown";
3274                 }
3275
3276                 push @headslist, \%ref_item;
3277         }
3278         close $fd;
3279
3280         return wantarray ? @headslist : \@headslist;
3281 }
3282
3283 sub git_get_tags_list {
3284         my $limit = shift;
3285         my @tagslist;
3286
3287         open my $fd, '-|', git_cmd(), 'for-each-ref',
3288                 ($limit ? '--count='.($limit+1) : ()), '--sort=-creatordate',
3289                 '--format=%(objectname) %(objecttype) %(refname) '.
3290                 '%(*objectname) %(*objecttype) %(subject)%00%(creator)',
3291                 'refs/tags'
3292                 or return;
3293         while (my $line = <$fd>) {
3294                 my %ref_item;
3295
3296                 chomp $line;
3297                 my ($refinfo, $creatorinfo) = split(/\0/, $line);
3298                 my ($id, $type, $name, $refid, $reftype, $title) = split(' ', $refinfo, 6);
3299                 my ($creator, $epoch, $tz) =
3300                         ($creatorinfo =~ /^(.*) ([0-9]+) (.*)$/);
3301                 $ref_item{'fullname'} = $name;
3302                 $name =~ s!^refs/tags/!!;
3303
3304                 $ref_item{'type'} = $type;
3305                 $ref_item{'id'} = $id;
3306                 $ref_item{'name'} = $name;
3307                 if ($type eq "tag") {
3308                         $ref_item{'subject'} = $title;
3309                         $ref_item{'reftype'} = $reftype;
3310                         $ref_item{'refid'}   = $refid;
3311                 } else {
3312                         $ref_item{'reftype'} = $type;
3313                         $ref_item{'refid'}   = $id;
3314                 }
3315
3316                 if ($type eq "tag" || $type eq "commit") {
3317                         $ref_item{'epoch'} = $epoch;
3318                         if ($epoch) {
3319                                 $ref_item{'age'} = age_string(time - $ref_item{'epoch'});
3320                         } else {
3321                                 $ref_item{'age'} = "unknown";
3322                         }
3323                 }
3324
3325                 push @tagslist, \%ref_item;
3326         }
3327         close $fd;
3328
3329         return wantarray ? @tagslist : \@tagslist;
3330 }
3331
3332 ## ----------------------------------------------------------------------
3333 ## filesystem-related functions
3334
3335 sub get_file_owner {
3336         my $path = shift;
3337
3338         my ($dev, $ino, $mode, $nlink, $st_uid, $st_gid, $rdev, $size) = stat($path);
3339         my ($name, $passwd, $uid, $gid, $quota, $comment, $gcos, $dir, $shell) = getpwuid($st_uid);
3340         if (!defined $gcos) {
3341                 return undef;
3342         }
3343         my $owner = $gcos;
3344         $owner =~ s/[,;].*$//;
3345         return to_utf8($owner);
3346 }
3347
3348 # assume that file exists
3349 sub insert_file {
3350         my $filename = shift;
3351
3352         open my $fd, '<', $filename;
3353         print map { to_utf8($_) } <$fd>;
3354         close $fd;
3355 }
3356
3357 ## ......................................................................
3358 ## mimetype related functions
3359
3360 sub mimetype_guess_file {
3361         my $filename = shift;
3362         my $mimemap = shift;
3363         -r $mimemap or return undef;
3364
3365         my %mimemap;
3366         open(my $mh, '<', $mimemap) or return undef;
3367         while (<$mh>) {
3368                 next if m/^#/; # skip comments
3369                 my ($mimetype, $exts) = split(/\t+/);
3370                 if (defined $exts) {
3371                         my @exts = split(/\s+/, $exts);
3372                         foreach my $ext (@exts) {
3373                                 $mimemap{$ext} = $mimetype;
3374                         }
3375                 }
3376         }
3377         close($mh);
3378
3379         $filename =~ /\.([^.]*)$/;
3380         return $mimemap{$1};
3381 }
3382
3383 sub mimetype_guess {
3384         my $filename = shift;
3385         my $mime;
3386         $filename =~ /\./ or return undef;
3387
3388         if ($mimetypes_file) {
3389                 my $file = $mimetypes_file;
3390                 if ($file !~ m!^/!) { # if it is relative path
3391                         # it is relative to project
3392                         $file = "$projectroot/$project/$file";
3393                 }
3394                 $mime = mimetype_guess_file($filename, $file);
3395         }
3396         $mime ||= mimetype_guess_file($filename, '/etc/mime.types');
3397         return $mime;
3398 }
3399
3400 sub blob_mimetype {
3401         my $fd = shift;
3402         my $filename = shift;
3403
3404         if ($filename) {
3405                 my $mime = mimetype_guess($filename);
3406                 $mime and return $mime;
3407         }
3408
3409         # just in case
3410         return $default_blob_plain_mimetype unless $fd;
3411
3412         if (-T $fd) {
3413                 return 'text/plain';
3414         } elsif (! $filename) {
3415                 return 'application/octet-stream';
3416         } elsif ($filename =~ m/\.png$/i) {
3417                 return 'image/png';
3418         } elsif ($filename =~ m/\.gif$/i) {
3419                 return 'image/gif';
3420         } elsif ($filename =~ m/\.jpe?g$/i) {
3421                 return 'image/jpeg';
3422         } else {
3423                 return 'application/octet-stream';
3424         }
3425 }
3426
3427 sub blob_contenttype {
3428         my ($fd, $file_name, $type) = @_;
3429
3430         $type ||= blob_mimetype($fd, $file_name);
3431         if ($type eq 'text/plain' && defined $default_text_plain_charset) {
3432                 $type .= "; charset=$default_text_plain_charset";
3433         }
3434
3435         return $type;
3436 }
3437
3438 # guess file syntax for syntax highlighting; return undef if no highlighting
3439 # the name of syntax can (in the future) depend on syntax highlighter used
3440 sub guess_file_syntax {
3441         my ($highlight, $mimetype, $file_name) = @_;
3442         return undef unless ($highlight && defined $file_name);
3443         my $basename = basename($file_name, '.in');
3444         return $highlight_basename{$basename}
3445                 if exists $highlight_basename{$basename};
3446
3447         $basename =~ /\.([^.]*)$/;
3448         my $ext = $1 or return undef;
3449         return $highlight_ext{$ext}
3450                 if exists $highlight_ext{$ext};
3451
3452         return undef;
3453 }
3454
3455 # run highlighter and return FD of its output,
3456 # or return original FD if no highlighting
3457 sub run_highlighter {
3458         my ($fd, $highlight, $syntax) = @_;
3459         return $fd unless ($highlight && defined $syntax);
3460
3461         close $fd
3462                 or die_error(404, "Reading blob failed");
3463         open $fd, quote_command(git_cmd(), "cat-file", "blob", $hash)." | ".
3464                   quote_command($highlight_bin).
3465                   " --xhtml --fragment --syntax $syntax |"
3466                 or die_error(500, "Couldn't open file or run syntax highlighter");
3467         return $fd;
3468 }
3469
3470 ## ======================================================================
3471 ## functions printing HTML: header, footer, error page
3472
3473 sub get_page_title {
3474         my $title = to_utf8($site_name);
3475
3476         return $title unless (defined $project);
3477         $title .= " - " . to_utf8($project);
3478
3479         return $title unless (defined $action);
3480         $title .= "/$action"; # $action is US-ASCII (7bit ASCII)
3481
3482         return $title unless (defined $file_name);
3483         $title .= " - " . esc_path($file_name);
3484         if ($action eq "tree" && $file_name !~ m|/$|) {
3485                 $title .= "/";
3486         }
3487
3488         return $title;
3489 }
3490
3491 sub git_header_html {
3492         my $status = shift || "200 OK";
3493         my $expires = shift;
3494         my %opts = @_;
3495
3496         my $title = get_page_title();
3497         my $content_type;
3498         # require explicit support from the UA if we are to send the page as
3499         # 'application/xhtml+xml', otherwise send it as plain old 'text/html'.
3500         # we have to do this because MSIE sometimes globs '*/*', pretending to
3501         # support xhtml+xml but choking when it gets what it asked for.
3502         if (defined $cgi->http('HTTP_ACCEPT') &&
3503             $cgi->http('HTTP_ACCEPT') =~ m/(,|;|\s|^)application\/xhtml\+xml(,|;|\s|$)/ &&
3504             $cgi->Accept('application/xhtml+xml') != 0) {
3505                 $content_type = 'application/xhtml+xml';
3506         } else {
3507                 $content_type = 'text/html';
3508         }
3509         print $cgi->header(-type=>$content_type, -charset => 'utf-8',
3510                            -status=> $status, -expires => $expires)
3511                 unless ($opts{'-no_http_header'});
3512         my $mod_perl_version = $ENV{'MOD_PERL'} ? " $ENV{'MOD_PERL'}" : '';
3513         print <<EOF;
3514 <?xml version="1.0" encoding="utf-8"?>
3515 <!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Strict//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-strict.dtd">
3516 <html xmlns="http://www.w3.org/1999/xhtml" xml:lang="en-US" lang="en-US">
3517 <!-- git web interface version $version, (C) 2005-2006, Kay Sievers <kay.sievers\@vrfy.org>, Christian Gierke -->
3518 <!-- git core binaries version $git_version -->
3519 <head>
3520 <meta http-equiv="content-type" content="$content_type; charset=utf-8"/>
3521 <meta name="generator" content="gitweb/$version git/$git_version$mod_perl_version"/>
3522 <meta name="robots" content="index, nofollow"/>
3523 <title>$title</title>
3524 EOF
3525         # the stylesheet, favicon etc urls won't work correctly with path_info
3526         # unless we set the appropriate base URL
3527         if ($ENV{'PATH_INFO'}) {
3528                 print "<base href=\"".esc_url($base_url)."\" />\n";
3529         }
3530         # print out each stylesheet that exist, providing backwards capability
3531         # for those people who defined $stylesheet in a config file
3532         if (defined $stylesheet) {
3533                 print '<link rel="stylesheet" type="text/css" href="'.$stylesheet.'"/>'."\n";
3534         } else {
3535                 foreach my $stylesheet (@stylesheets) {
3536                         next unless $stylesheet;
3537                         print '<link rel="stylesheet" type="text/css" href="'.$stylesheet.'"/>'."\n";
3538                 }
3539         }
3540         if (defined $project) {
3541                 my %href_params = get_feed_info();
3542                 if (!exists $href_params{'-title'}) {
3543                         $href_params{'-title'} = 'log';
3544                 }
3545
3546                 foreach my $format qw(RSS Atom) {
3547                         my $type = lc($format);
3548                         my %link_attr = (
3549                                 '-rel' => 'alternate',
3550                                 '-title' => "$project - $href_params{'-title'} - $format feed",
3551                                 '-type' => "application/$type+xml"
3552                         );
3553
3554                         $href_params{'action'} = $type;
3555                         $link_attr{'-href'} = href(%href_params);
3556                         print "<link ".
3557                               "rel=\"$link_attr{'-rel'}\" ".
3558                               "title=\"$link_attr{'-title'}\" ".
3559                               "href=\"$link_attr{'-href'}\" ".
3560                               "type=\"$link_attr{'-type'}\" ".
3561                               "/>\n";
3562
3563                         $href_params{'extra_options'} = '--no-merges';
3564                         $link_attr{'-href'} = href(%href_params);
3565                         $link_attr{'-title'} .= ' (no merges)';
3566                         print "<link ".
3567                               "rel=\"$link_attr{'-rel'}\" ".
3568                               "title=\"$link_attr{'-title'}\" ".
3569                               "href=\"$link_attr{'-href'}\" ".
3570                               "type=\"$link_attr{'-type'}\" ".
3571                               "/>\n";
3572                 }
3573
3574         } else {
3575                 printf('<link rel="alternate" title="%s projects list" '.
3576                        'href="%s" type="text/plain; charset=utf-8" />'."\n",
3577                        $site_name, href(project=>undef, action=>"project_index"));
3578                 printf('<link rel="alternate" title="%s projects feeds" '.
3579                        'href="%s" type="text/x-opml" />'."\n",
3580                        $site_name, href(project=>undef, action=>"opml"));
3581         }
3582         if (defined $favicon) {
3583                 print qq(<link rel="shortcut icon" href="$favicon" type="image/png" />\n);
3584         }
3585
3586         print "</head>\n" .
3587               "<body>\n";
3588
3589         if (defined $site_header && -f $site_header) {
3590                 insert_file($site_header);
3591         }
3592
3593         print "<div class=\"page_header\">\n" .
3594               $cgi->a({-href => esc_url($logo_url),
3595                        -title => $logo_label},
3596                       qq(<img src="$logo" width="72" height="27" alt="git" class="logo"/>));
3597         print $cgi->a({-href => esc_url($home_link)}, $home_link_str) . " / ";
3598         if (defined $project) {
3599                 print $cgi->a({-href => href(action=>"summary")}, esc_html($project));
3600                 if (defined $action) {
3601                         my $action_print = $action ;
3602                         if (defined $opts{-action_extra}) {
3603                                 $action_print = $cgi->a({-href => href(action=>$action)},
3604                                         $action);
3605                         }
3606                         print " / $action_print";
3607                 }
3608                 if (defined $opts{-action_extra}) {
3609                         print " / $opts{-action_extra}";
3610                 }
3611                 print "\n";
3612         }
3613         print "</div>\n";
3614
3615         my $have_search = gitweb_check_feature('search');
3616         if (defined $project && $have_search) {
3617                 if (!defined $searchtext) {
3618                         $searchtext = "";
3619                 }
3620                 my $search_hash;
3621                 if (defined $hash_base) {
3622                         $search_hash = $hash_base;
3623                 } elsif (defined $hash) {
3624                         $search_hash = $hash;
3625                 } else {
3626                         $search_hash = "HEAD";
3627                 }
3628                 my $action = $my_uri;
3629                 my $use_pathinfo = gitweb_check_feature('pathinfo');
3630                 if ($use_pathinfo) {
3631                         $action .= "/".esc_url($project);
3632                 }
3633                 print $cgi->startform(-method => "get", -action => $action) .
3634                       "<div class=\"search\">\n" .
3635                       (!$use_pathinfo &&
3636                       $cgi->input({-name=>"p", -value=>$project, -type=>"hidden"}) . "\n") .
3637                       $cgi->input({-name=>"a", -value=>"search", -type=>"hidden"}) . "\n" .
3638                       $cgi->input({-name=>"h", -value=>$search_hash, -type=>"hidden"}) . "\n" .
3639                       $cgi->popup_menu(-name => 'st', -default => 'commit',
3640                                        -values => ['commit', 'grep', 'author', 'committer', 'pickaxe']) .
3641                       $cgi->sup($cgi->a({-href => href(action=>"search_help")}, "?")) .
3642                       " search:\n",
3643                       $cgi->textfield(-name => "s", -value => $searchtext) . "\n" .
3644                       "<span title=\"Extended regular expression\">" .
3645                       $cgi->checkbox(-name => 'sr', -value => 1, -label => 're',
3646                                      -checked => $search_use_regexp) .
3647                       "</span>" .
3648                       "</div>" .
3649                       $cgi->end_form() . "\n";
3650         }
3651 }
3652
3653 sub git_footer_html {
3654         my $feed_class = 'rss_logo';
3655
3656         print "<div class=\"page_footer\">\n";
3657         if (defined $project) {
3658                 my $descr = git_get_project_description($project);
3659                 if (defined $descr) {
3660                         print "<div class=\"page_footer_text\">" . esc_html($descr) . "</div>\n";
3661                 }
3662
3663                 my %href_params = get_feed_info();
3664                 if (!%href_params) {
3665                         $feed_class .= ' generic';
3666                 }
3667                 $href_params{'-title'} ||= 'log';
3668
3669                 foreach my $format qw(RSS Atom) {
3670                         $href_params{'action'} = lc($format);
3671                         print $cgi->a({-href => href(%href_params),
3672                                       -title => "$href_params{'-title'} $format feed",
3673                                       -class => $feed_class}, $format)."\n";
3674                 }
3675
3676         } else {
3677                 print $cgi->a({-href => href(project=>undef, action=>"opml"),
3678                               -class => $feed_class}, "OPML") . " ";
3679                 print $cgi->a({-href => href(project=>undef, action=>"project_index"),
3680                               -class => $feed_class}, "TXT") . "\n";
3681         }
3682         print "</div>\n"; # class="page_footer"
3683
3684         if (defined $t0 && gitweb_check_feature('timed')) {
3685                 print "<div id=\"generating_info\">\n";
3686                 print 'This page took '.
3687                       '<span id="generating_time" class="time_span">'.
3688                       tv_interval($t0, [ gettimeofday() ]).
3689                       ' seconds </span>'.
3690                       ' and '.
3691                       '<span id="generating_cmd">'.
3692                       $number_of_git_cmds.
3693                       '</span> git commands '.
3694                       " to generate.\n";
3695                 print "</div>\n"; # class="page_footer"
3696         }
3697
3698         if (defined $site_footer && -f $site_footer) {
3699                 insert_file($site_footer);
3700         }
3701
3702         print qq!<script type="text/javascript" src="$javascript"></script>\n!;
3703         if (defined $action &&
3704             $action eq 'blame_incremental') {
3705                 print qq!<script type="text/javascript">\n!.
3706                       qq!startBlame("!. href(action=>"blame_data", -replay=>1) .qq!",\n!.
3707                       qq!           "!. href() .qq!");\n!.
3708                       qq!</script>\n!;
3709         } elsif (gitweb_check_feature('javascript-actions')) {
3710                 print qq!<script type="text/javascript">\n!.
3711                       qq!window.onload = fixLinks;\n!.
3712                       qq!</script>\n!;
3713         }
3714
3715         print "</body>\n" .
3716               "</html>";
3717 }
3718
3719 # die_error(<http_status_code>, <error_message>[, <detailed_html_description>])
3720 # Example: die_error(404, 'Hash not found')
3721 # By convention, use the following status codes (as defined in RFC 2616):
3722 # 400: Invalid or missing CGI parameters, or
3723 #      requested object exists but has wrong type.
3724 # 403: Requested feature (like "pickaxe" or "snapshot") not enabled on
3725 #      this server or project.
3726 # 404: Requested object/revision/project doesn't exist.
3727 # 500: The server isn't configured properly, or
3728 #      an internal error occurred (e.g. failed assertions caused by bugs), or
3729 #      an unknown error occurred (e.g. the git binary died unexpectedly).
3730 # 503: The server is currently unavailable (because it is overloaded,
3731 #      or down for maintenance).  Generally, this is a temporary state.
3732 sub die_error {
3733         my $status = shift || 500;
3734         my $error = esc_html(shift) || "Internal Server Error";
3735         my $extra = shift;
3736         my %opts = @_;
3737
3738         my %http_responses = (
3739                 400 => '400 Bad Request',
3740                 403 => '403 Forbidden',
3741                 404 => '404 Not Found',
3742                 500 => '500 Internal Server Error',
3743                 503 => '503 Service Unavailable',
3744         );
3745         git_header_html($http_responses{$status}, undef, %opts);
3746         print <<EOF;
3747 <div class="page_body">
3748 <br /><br />
3749 $status - $error
3750 <br />
3751 EOF
3752         if (defined $extra) {
3753                 print "<hr />\n" .
3754                       "$extra\n";
3755         }
3756         print "</div>\n";
3757
3758         git_footer_html();
3759         goto DONE_GITWEB
3760                 unless ($opts{'-error_handler'});
3761 }
3762
3763 ## ----------------------------------------------------------------------
3764 ## functions printing or outputting HTML: navigation
3765
3766 sub git_print_page_nav {
3767         my ($current, $suppress, $head, $treehead, $treebase, $extra) = @_;
3768         $extra = '' if !defined $extra; # pager or formats
3769
3770         my @navs = qw(summary shortlog log commit commitdiff tree);
3771         if ($suppress) {
3772                 @navs = grep { $_ ne $suppress } @navs;
3773         }
3774
3775         my %arg = map { $_ => {action=>$_} } @navs;
3776         if (defined $head) {
3777                 for (qw(commit commitdiff)) {
3778                         $arg{$_}{'hash'} = $head;
3779                 }
3780                 if ($current =~ m/^(tree | log | shortlog | commit | commitdiff | search)$/x) {
3781                         for (qw(shortlog log)) {
3782                                 $arg{$_}{'hash'} = $head;
3783                         }
3784                 }
3785         }
3786
3787         $arg{'tree'}{'hash'} = $treehead if defined $treehead;
3788         $arg{'tree'}{'hash_base'} = $treebase if defined $treebase;
3789
3790         my @actions = gitweb_get_feature('actions');
3791         my %repl = (
3792                 '%' => '%',
3793                 'n' => $project,         # project name
3794                 'f' => $git_dir,         # project path within filesystem
3795                 'h' => $treehead || '',  # current hash ('h' parameter)
3796                 'b' => $treebase || '',  # hash base ('hb' parameter)
3797         );
3798         while (@actions) {
3799                 my ($label, $link, $pos) = splice(@actions,0,3);
3800                 # insert
3801                 @navs = map { $_ eq $pos ? ($_, $label) : $_ } @navs;
3802                 # munch munch
3803                 $link =~ s/%([%nfhb])/$repl{$1}/g;
3804                 $arg{$label}{'_href'} = $link;
3805         }
3806
3807         print "<div class=\"page_nav\">\n" .
3808                 (join " | ",
3809                  map { $_ eq $current ?
3810                        $_ : $cgi->a({-href => ($arg{$_}{_href} ? $arg{$_}{_href} : href(%{$arg{$_}}))}, "$_")
3811                  } @navs);
3812         print "<br/>\n$extra<br/>\n" .
3813               "</div>\n";
3814 }
3815
3816 # returns a submenu for the nagivation of the refs views (tags, heads,
3817 # remotes) with the current view disabled and the remotes view only
3818 # available if the feature is enabled
3819 sub format_ref_views {
3820         my ($current) = @_;
3821         my @ref_views = qw{tags heads};
3822         push @ref_views, 'remotes' if gitweb_check_feature('remote_heads');
3823         return join " | ", map {
3824                 $_ eq $current ? $_ :
3825                 $cgi->a({-href => href(action=>$_)}, $_)
3826         } @ref_views
3827 }
3828
3829 sub format_paging_nav {
3830         my ($action, $page, $has_next_link) = @_;
3831         my $paging_nav;
3832
3833
3834         if ($page > 0) {
3835                 $paging_nav .=
3836                         $cgi->a({-href => href(-replay=>1, page=>undef)}, "first") .
3837                         " &sdot; " .
3838                         $cgi->a({-href => href(-replay=>1, page=>$page-1),
3839                                  -accesskey => "p", -title => "Alt-p"}, "prev");
3840         } else {
3841                 $paging_nav .= "first &sdot; prev";
3842         }
3843
3844         if ($has_next_link) {
3845                 $paging_nav .= " &sdot; " .
3846                         $cgi->a({-href => href(-replay=>1, page=>$page+1),
3847                                  -accesskey => "n", -title => "Alt-n"}, "next");
3848         } else {
3849                 $paging_nav .= " &sdot; next";
3850         }
3851
3852         return $paging_nav;
3853 }
3854
3855 ## ......................................................................
3856 ## functions printing or outputting HTML: div
3857
3858 sub git_print_header_div {
3859         my ($action, $title, $hash, $hash_base) = @_;
3860         my %args = ();
3861
3862         $args{'action'} = $action;
3863         $args{'hash'} = $hash if $hash;
3864         $args{'hash_base'} = $hash_base if $hash_base;
3865
3866         print "<div class=\"header\">\n" .
3867               $cgi->a({-href => href(%args), -class => "title"},
3868               $title ? $title : $action) .
3869               "\n</div>\n";
3870 }
3871
3872 sub format_repo_url {
3873         my ($name, $url) = @_;
3874         return "<tr class=\"metadata_url\"><td>$name</td><td>$url</td></tr>\n";
3875 }
3876
3877 # Group output by placing it in a DIV element and adding a header.
3878 # Options for start_div() can be provided by passing a hash reference as the
3879 # first parameter to the function.
3880 # Options to git_print_header_div() can be provided by passing an array
3881 # reference. This must follow the options to start_div if they are present.
3882 # The content can be a scalar, which is output as-is, a scalar reference, which
3883 # is output after html escaping, an IO handle passed either as *handle or
3884 # *handle{IO}, or a function reference. In the latter case all following
3885 # parameters will be taken as argument to the content function call.
3886 sub git_print_section {
3887         my ($div_args, $header_args, $content);
3888         my $arg = shift;
3889         if (ref($arg) eq 'HASH') {
3890                 $div_args = $arg;
3891                 $arg = shift;
3892         }
3893         if (ref($arg) eq 'ARRAY') {
3894                 $header_args = $arg;
3895                 $arg = shift;
3896         }
3897         $content = $arg;
3898
3899         print $cgi->start_div($div_args);
3900         git_print_header_div(@$header_args);
3901
3902         if (ref($content) eq 'CODE') {
3903                 $content->(@_);
3904         } elsif (ref($content) eq 'SCALAR') {
3905                 print esc_html($$content);
3906         } elsif (ref($content) eq 'GLOB' or ref($content) eq 'IO::Handle') {
3907                 print <$content>;
3908         } elsif (!ref($content) && defined($content)) {
3909                 print $content;
3910         }
3911
3912         print $cgi->end_div;
3913 }
3914
3915 sub print_local_time {
3916         print format_local_time(@_);
3917 }
3918
3919 sub format_local_time {
3920         my $localtime = '';
3921         my %date = @_;
3922         if ($date{'hour_local'} < 6) {
3923                 $localtime .= sprintf(" (<span class=\"atnight\">%02d:%02d</span> %s)",
3924                         $date{'hour_local'}, $date{'minute_local'}, $date{'tz_local'});
3925         } else {
3926                 $localtime .= sprintf(" (%02d:%02d %s)",
3927                         $date{'hour_local'}, $date{'minute_local'}, $date{'tz_local'});
3928         }
3929
3930         return $localtime;
3931 }
3932
3933 # Outputs the author name and date in long form
3934 sub git_print_authorship {
3935         my $co = shift;
3936         my %opts = @_;
3937         my $tag = $opts{-tag} || 'div';
3938         my $author = $co->{'author_name'};
3939
3940         my %ad = parse_date($co->{'author_epoch'}, $co->{'author_tz'});
3941         print "<$tag class=\"author_date\">" .
3942               format_search_author($author, "author", esc_html($author)) .
3943               " [$ad{'rfc2822'}";
3944         print_local_time(%ad) if ($opts{-localtime});
3945         print "]" . git_get_avatar($co->{'author_email'}, -pad_before => 1)
3946                   . "</$tag>\n";
3947 }
3948
3949 # Outputs table rows containing the full author or committer information,
3950 # in the format expected for 'commit' view (& similar).
3951 # Parameters are a commit hash reference, followed by the list of people
3952 # to output information for. If the list is empty it defaults to both
3953 # author and committer.
3954 sub git_print_authorship_rows {
3955         my $co = shift;
3956         # too bad we can't use @people = @_ || ('author', 'committer')
3957         my @people = @_;
3958         @people = ('author', 'committer') unless @people;
3959         foreach my $who (@people) {
3960                 my %wd = parse_date($co->{"${who}_epoch"}, $co->{"${who}_tz"});
3961                 print "<tr><td>$who</td><td>" .
3962                       format_search_author($co->{"${who}_name"}, $who,
3963                                esc_html($co->{"${who}_name"})) . " " .
3964                       format_search_author($co->{"${who}_email"}, $who,
3965                                esc_html("<" . $co->{"${who}_email"} . ">")) .
3966                       "</td><td rowspan=\"2\">" .
3967                       git_get_avatar($co->{"${who}_email"}, -size => 'double') .
3968                       "</td></tr>\n" .
3969                       "<tr>" .
3970                       "<td></td><td> $wd{'rfc2822'}";
3971                 print_local_time(%wd);
3972                 print "</td>" .
3973                       "</tr>\n";
3974         }
3975 }
3976
3977 sub git_print_page_path {
3978         my $name = shift;
3979         my $type = shift;
3980         my $hb = shift;
3981
3982
3983         print "<div class=\"page_path\">";
3984         print $cgi->a({-href => href(action=>"tree", hash_base=>$hb),
3985                       -title => 'tree root'}, to_utf8("[$project]"));
3986         print " / ";
3987         if (defined $name) {
3988                 my @dirname = split '/', $name;
3989                 my $basename = pop @dirname;
3990                 my $fullname = '';
3991
3992                 foreach my $dir (@dirname) {
3993                         $fullname .= ($fullname ? '/' : '') . $dir;
3994                         print $cgi->a({-href => href(action=>"tree", file_name=>$fullname,
3995                                                      hash_base=>$hb),
3996                                       -title => $fullname}, esc_path($dir));
3997                         print " / ";
3998                 }
3999                 if (defined $type && $type eq 'blob') {
4000                         print $cgi->a({-href => href(action=>"blob_plain", file_name=>$file_name,
4001                                                      hash_base=>$hb),
4002                                       -title => $name}, esc_path($basename));
4003                 } elsif (defined $type && $type eq 'tree') {
4004                         print $cgi->a({-href => href(action=>"tree", file_name=>$file_name,
4005                                                      hash_base=>$hb),
4006                                       -title => $name}, esc_path($basename));
4007                         print " / ";
4008                 } else {
4009                         print esc_path($basename);
4010                 }
4011         }
4012         print "<br/></div>\n";
4013 }
4014
4015 sub git_print_log {
4016         my $log = shift;
4017         my %opts = @_;
4018
4019         if ($opts{'-remove_title'}) {
4020                 # remove title, i.e. first line of log
4021                 shift @$log;
4022         }
4023         # remove leading empty lines
4024         while (defined $log->[0] && $log->[0] eq "") {
4025                 shift @$log;
4026         }
4027
4028         # print log
4029         my $signoff = 0;
4030         my $empty = 0;
4031         foreach my $line (@$log) {
4032                 if ($line =~ m/^ *(signed[ \-]off[ \-]by[ :]|acked[ \-]by[ :]|cc[ :])/i) {
4033                         $signoff = 1;
4034                         $empty = 0;
4035                         if (! $opts{'-remove_signoff'}) {
4036                                 print "<span class=\"signoff\">" . esc_html($line) . "</span><br/>\n";
4037                                 next;
4038                         } else {
4039                                 # remove signoff lines
4040                                 next;
4041                         }
4042                 } else {
4043                         $signoff = 0;
4044                 }
4045
4046                 # print only one empty line
4047                 # do not print empty line after signoff
4048                 if ($line eq "") {
4049                         next if ($empty || $signoff);
4050                         $empty = 1;
4051                 } else {
4052                         $empty = 0;
4053                 }
4054
4055                 print format_log_line_html($line) . "<br/>\n";
4056         }
4057
4058         if ($opts{'-final_empty_line'}) {
4059                 # end with single empty line
4060                 print "<br/>\n" unless $empty;
4061         }
4062 }
4063
4064 # return link target (what link points to)
4065 sub git_get_link_target {
4066         my $hash = shift;
4067         my $link_target;
4068
4069         # read link
4070         open my $fd, "-|", git_cmd(), "cat-file", "blob", $hash
4071                 or return;
4072         {
4073                 local $/ = undef;
4074                 $link_target = <$fd>;
4075         }
4076         close $fd
4077                 or return;
4078
4079         return $link_target;
4080 }
4081
4082 # given link target, and the directory (basedir) the link is in,
4083 # return target of link relative to top directory (top tree);
4084 # return undef if it is not possible (including absolute links).
4085 sub normalize_link_target {
4086         my ($link_target, $basedir) = @_;
4087
4088         # absolute symlinks (beginning with '/') cannot be normalized
4089         return if (substr($link_target, 0, 1) eq '/');
4090
4091         # normalize link target to path from top (root) tree (dir)
4092         my $path;
4093         if ($basedir) {
4094                 $path = $basedir . '/' . $link_target;
4095         } else {
4096                 # we are in top (root) tree (dir)
4097                 $path = $link_target;
4098         }
4099
4100         # remove //, /./, and /../
4101         my @path_parts;
4102         foreach my $part (split('/', $path)) {
4103                 # discard '.' and ''
4104                 next if (!$part || $part eq '.');
4105                 # handle '..'
4106                 if ($part eq '..') {
4107                         if (@path_parts) {
4108                                 pop @path_parts;
4109                         } else {
4110                                 # link leads outside repository (outside top dir)
4111                                 return;
4112                         }
4113                 } else {
4114                         push @path_parts, $part;
4115                 }
4116         }
4117         $path = join('/', @path_parts);
4118
4119         return $path;
4120 }
4121
4122 # print tree entry (row of git_tree), but without encompassing <tr> element
4123 sub git_print_tree_entry {
4124         my ($t, $basedir, $hash_base, $have_blame) = @_;
4125
4126         my %base_key = ();
4127         $base_key{'hash_base'} = $hash_base if defined $hash_base;
4128
4129         # The format of a table row is: mode list link.  Where mode is
4130         # the mode of the entry, list is the name of the entry, an href,
4131         # and link is the action links of the entry.
4132
4133         print "<td class=\"mode\">" . mode_str($t->{'mode'}) . "</td>\n";
4134         if (exists $t->{'size'}) {
4135                 print "<td class=\"size\">$t->{'size'}</td>\n";
4136         }
4137         if ($t->{'type'} eq "blob") {
4138                 print "<td class=\"list\">" .
4139                         $cgi->a({-href => href(action=>"blob", hash=>$t->{'hash'},
4140                                                file_name=>"$basedir$t->{'name'}", %base_key),
4141                                 -class => "list"}, esc_path($t->{'name'}));
4142                 if (S_ISLNK(oct $t->{'mode'})) {
4143                         my $link_target = git_get_link_target($t->{'hash'});
4144                         if ($link_target) {
4145                                 my $norm_target = normalize_link_target($link_target, $basedir);
4146                                 if (defined $norm_target) {
4147                                         print " -> " .
4148                                               $cgi->a({-href => href(action=>"object", hash_base=>$hash_base,
4149                                                                      file_name=>$norm_target),
4150                                                        -title => $norm_target}, esc_path($link_target));
4151                                 } else {
4152                                         print " -> " . esc_path($link_target);
4153                                 }
4154                         }
4155                 }
4156                 print "</td>\n";
4157                 print "<td class=\"link\">";
4158                 print $cgi->a({-href => href(action=>"blob", hash=>$t->{'hash'},
4159                                              file_name=>"$basedir$t->{'name'}", %base_key)},
4160                               "blob");
4161                 if ($have_blame) {
4162                         print " | " .
4163                               $cgi->a({-href => href(action=>"blame", hash=>$t->{'hash'},
4164                                                      file_name=>"$basedir$t->{'name'}", %base_key)},
4165                                       "blame");
4166                 }
4167                 if (defined $hash_base) {
4168                         print " | " .
4169                               $cgi->a({-href => href(action=>"history", hash_base=>$hash_base,
4170                                                      hash=>$t->{'hash'}, file_name=>"$basedir$t->{'name'}")},
4171                                       "history");
4172                 }
4173                 print " | " .
4174                         $cgi->a({-href => href(action=>"blob_plain", hash_base=>$hash_base,
4175                                                file_name=>"$basedir$t->{'name'}")},
4176                                 "raw");
4177                 print "</td>\n";
4178
4179         } elsif ($t->{'type'} eq "tree") {
4180                 print "<td class=\"list\">";
4181                 print $cgi->a({-href => href(action=>"tree", hash=>$t->{'hash'},
4182                                              file_name=>"$basedir$t->{'name'}",
4183                                              %base_key)},
4184                               esc_path($t->{'name'}));
4185                 print "</td>\n";
4186                 print "<td class=\"link\">";
4187                 print $cgi->a({-href => href(action=>"tree", hash=>$t->{'hash'},
4188                                              file_name=>"$basedir$t->{'name'}",
4189                                              %base_key)},
4190                               "tree");
4191                 if (defined $hash_base) {
4192                         print " | " .
4193                               $cgi->a({-href => href(action=>"history", hash_base=>$hash_base,
4194                                                      file_name=>"$basedir$t->{'name'}")},
4195                                       "history");
4196                 }
4197                 print "</td>\n";
4198         } else {
4199                 # unknown object: we can only present history for it
4200                 # (this includes 'commit' object, i.e. submodule support)
4201                 print "<td class=\"list\">" .
4202                       esc_path($t->{'name'}) .
4203                       "</td>\n";
4204                 print "<td class=\"link\">";
4205                 if (defined $hash_base) {
4206                         print $cgi->a({-href => href(action=>"history",
4207                                                      hash_base=>$hash_base,
4208                                                      file_name=>"$basedir$t->{'name'}")},
4209                                       "history");
4210                 }
4211                 print "</td>\n";
4212         }
4213 }
4214
4215 ## ......................................................................
4216 ## functions printing large fragments of HTML
4217
4218 # get pre-image filenames for merge (combined) diff
4219 sub fill_from_file_info {
4220         my ($diff, @parents) = @_;
4221
4222         $diff->{'from_file'} = [ ];
4223         $diff->{'from_file'}[$diff->{'nparents'} - 1] = undef;
4224         for (my $i = 0; $i < $diff->{'nparents'}; $i++) {
4225                 if ($diff->{'status'}[$i] eq 'R' ||
4226                     $diff->{'status'}[$i] eq 'C') {
4227                         $diff->{'from_file'}[$i] =
4228                                 git_get_path_by_hash($parents[$i], $diff->{'from_id'}[$i]);
4229                 }
4230         }
4231
4232         return $diff;
4233 }
4234
4235 # is current raw difftree line of file deletion
4236 sub is_deleted {
4237         my $diffinfo = shift;
4238
4239         return $diffinfo->{'to_id'} eq ('0' x 40);
4240 }
4241
4242 # does patch correspond to [previous] difftree raw line
4243 # $diffinfo  - hashref of parsed raw diff format
4244 # $patchinfo - hashref of parsed patch diff format
4245 #              (the same keys as in $diffinfo)
4246 sub is_patch_split {
4247         my ($diffinfo, $patchinfo) = @_;
4248
4249         return defined $diffinfo && defined $patchinfo
4250                 && $diffinfo->{'to_file'} eq $patchinfo->{'to_file'};
4251 }
4252
4253
4254 sub git_difftree_body {
4255         my ($difftree, $hash, @parents) = @_;
4256         my ($parent) = $parents[0];
4257         my $have_blame = gitweb_check_feature('blame');
4258         print "<div class=\"list_head\">\n";
4259         if ($#{$difftree} > 10) {
4260                 print(($#{$difftree} + 1) . " files changed:\n");
4261         }
4262         print "</div>\n";
4263
4264         print "<table class=\"" .
4265               (@parents > 1 ? "combined " : "") .
4266               "diff_tree\">\n";
4267
4268         # header only for combined diff in 'commitdiff' view
4269         my $has_header = @$difftree && @parents > 1 && $action eq 'commitdiff';
4270         if ($has_header) {
4271                 # table header
4272                 print "<thead><tr>\n" .
4273                        "<th></th><th></th>\n"; # filename, patchN link
4274                 for (my $i = 0; $i < @parents; $i++) {
4275                         my $par = $parents[$i];
4276                         print "<th>" .
4277                               $cgi->a({-href => href(action=>"commitdiff",
4278                                                      hash=>$hash, hash_parent=>$par),
4279                                        -title => 'commitdiff to parent number ' .
4280                                                   ($i+1) . ': ' . substr($par,0,7)},
4281                                       $i+1) .
4282                               "&nbsp;</th>\n";
4283                 }
4284                 print "</tr></thead>\n<tbody>\n";
4285         }
4286
4287         my $alternate = 1;
4288         my $patchno = 0;
4289         foreach my $line (@{$difftree}) {
4290                 my $diff = parsed_difftree_line($line);
4291
4292                 if ($alternate) {
4293                         print "<tr class=\"dark\">\n";
4294                 } else {
4295                         print "<tr class=\"light\">\n";
4296                 }
4297                 $alternate ^= 1;
4298
4299                 if (exists $diff->{'nparents'}) { # combined diff
4300
4301                         fill_from_file_info($diff, @parents)
4302                                 unless exists $diff->{'from_file'};
4303
4304                         if (!is_deleted($diff)) {
4305                                 # file exists in the result (child) commit
4306                                 print "<td>" .
4307                                       $cgi->a({-href => href(action=>"blob", hash=>$diff->{'to_id'},
4308                                                              file_name=>$diff->{'to_file'},
4309                                                              hash_base=>$hash),
4310                                               -class => "list"}, esc_path($diff->{'to_file'})) .
4311                                       "</td>\n";
4312                         } else {
4313                                 print "<td>" .
4314                                       esc_path($diff->{'to_file'}) .
4315                                       "</td>\n";
4316                         }
4317
4318                         if ($action eq 'commitdiff') {
4319                                 # link to patch
4320                                 $patchno++;
4321                                 print "<td class=\"link\">" .
4322                                       $cgi->a({-href => "#patch$patchno"}, "patch") .
4323                                       " | " .
4324                                       "</td>\n";
4325                         }
4326
4327                         my $has_history = 0;
4328                         my $not_deleted = 0;
4329                         for (my $i = 0; $i < $diff->{'nparents'}; $i++) {
4330                                 my $hash_parent = $parents[$i];
4331                                 my $from_hash = $diff->{'from_id'}[$i];
4332                                 my $from_path = $diff->{'from_file'}[$i];
4333                                 my $status = $diff->{'status'}[$i];
4334
4335                                 $has_history ||= ($status ne 'A');
4336                                 $not_deleted ||= ($status ne 'D');
4337
4338                                 if ($status eq 'A') {
4339                                         print "<td  class=\"link\" align=\"right\"> | </td>\n";
4340                                 } elsif ($status eq 'D') {
4341                                         print "<td class=\"link\">" .
4342                                               $cgi->a({-href => href(action=>"blob",
4343                                                                      hash_base=>$hash,
4344                                                                      hash=>$from_hash,
4345                                                                      file_name=>$from_path)},
4346                                                       "blob" . ($i+1)) .
4347                                               " | </td>\n";
4348                                 } else {
4349                                         if ($diff->{'to_id'} eq $from_hash) {
4350                                                 print "<td class=\"link nochange\">";
4351                                         } else {
4352                                                 print "<td class=\"link\">";
4353                                         }
4354                                         print $cgi->a({-href => href(action=>"blobdiff",
4355                                                                      hash=>$diff->{'to_id'},
4356                                                                      hash_parent=>$from_hash,
4357                                                                      hash_base=>$hash,
4358                                                                      hash_parent_base=>$hash_parent,
4359                                                                      file_name=>$diff->{'to_file'},
4360                                                                      file_parent=>$from_path)},
4361                                                       "diff" . ($i+1)) .
4362                                               " | </td>\n";
4363                                 }
4364                         }
4365
4366                         print "<td class=\"link\">";
4367                         if ($not_deleted) {
4368                                 print $cgi->a({-href => href(action=>"blob",
4369                                                              hash=>$diff->{'to_id'},
4370                                                              file_name=>$diff->{'to_file'},
4371                                                              hash_base=>$hash)},
4372                                               "blob");
4373                                 print " | " if ($has_history);
4374                         }
4375                         if ($has_history) {
4376                                 print $cgi->a({-href => href(action=>"history",
4377                                                              file_name=>$diff->{'to_file'},
4378                                                              hash_base=>$hash)},
4379                                               "history");
4380                         }
4381                         print "</td>\n";
4382
4383                         print "</tr>\n";
4384                         next; # instead of 'else' clause, to avoid extra indent
4385                 }
4386                 # else ordinary diff
4387
4388                 my ($to_mode_oct, $to_mode_str, $to_file_type);
4389                 my ($from_mode_oct, $from_mode_str, $from_file_type);
4390                 if ($diff->{'to_mode'} ne ('0' x 6)) {
4391                         $to_mode_oct = oct $diff->{'to_mode'};
4392                         if (S_ISREG($to_mode_oct)) { # only for regular file
4393                                 $to_mode_str = sprintf("%04o", $to_mode_oct & 0777); # permission bits
4394                         }
4395                         $to_file_type = file_type($diff->{'to_mode'});
4396                 }
4397                 if ($diff->{'from_mode'} ne ('0' x 6)) {
4398                         $from_mode_oct = oct $diff->{'from_mode'};
4399                         if (S_ISREG($to_mode_oct)) { # only for regular file
4400                                 $from_mode_str = sprintf("%04o", $from_mode_oct & 0777); # permission bits
4401                         }
4402                         $from_file_type = file_type($diff->{'from_mode'});
4403                 }
4404
4405                 if ($diff->{'status'} eq "A") { # created
4406                         my $mode_chng = "<span class=\"file_status new\">[new $to_file_type";
4407                         $mode_chng   .= " with mode: $to_mode_str" if $to_mode_str;
4408                         $mode_chng   .= "]</span>";
4409                         print "<td>";
4410                         print $cgi->a({-href => href(action=>"blob", hash=>$diff->{'to_id'},
4411                                                      hash_base=>$hash, file_name=>$diff->{'file'}),
4412                                       -class => "list"}, esc_path($diff->{'file'}));
4413                         print "</td>\n";
4414                         print "<td>$mode_chng</td>\n";
4415                         print "<td class=\"link\">";
4416                         if ($action eq 'commitdiff') {
4417                                 # link to patch
4418                                 $patchno++;
4419                                 print $cgi->a({-href => "#patch$patchno"}, "patch");
4420                                 print " | ";
4421                         }
4422                         print $cgi->a({-href => href(action=>"blob", hash=>$diff->{'to_id'},
4423                                                      hash_base=>$hash, file_name=>$diff->{'file'})},
4424                                       "blob");
4425                         print "</td>\n";
4426
4427                 } elsif ($diff->{'status'} eq "D") { # deleted
4428                         my $mode_chng = "<span class=\"file_status deleted\">[deleted $from_file_type]</span>";
4429                         print "<td>";
4430                         print $cgi->a({-href => href(action=>"blob", hash=>$diff->{'from_id'},
4431                                                      hash_base=>$parent, file_name=>$diff->{'file'}),
4432                                        -class => "list"}, esc_path($diff->{'file'}));
4433                         print "</td>\n";
4434                         print "<td>$mode_chng</td>\n";
4435                         print "<td class=\"link\">";
4436                         if ($action eq 'commitdiff') {
4437                                 # link to patch
4438                                 $patchno++;
4439                                 print $cgi->a({-href => "#patch$patchno"}, "patch");
4440                                 print " | ";
4441                         }
4442                         print $cgi->a({-href => href(action=>"blob", hash=>$diff->{'from_id'},
4443                                                      hash_base=>$parent, file_name=>$diff->{'file'})},
4444                                       "blob") . " | ";
4445                         if ($have_blame) {
4446                                 print $cgi->a({-href => href(action=>"blame", hash_base=>$parent,
4447                                                              file_name=>$diff->{'file'})},
4448                                               "blame") . " | ";
4449                         }
4450                         print $cgi->a({-href => href(action=>"history", hash_base=>$parent,
4451                                                      file_name=>$diff->{'file'})},
4452                                       "history");
4453                         print "</td>\n";
4454
4455                 } elsif ($diff->{'status'} eq "M" || $diff->{'status'} eq "T") { # modified, or type changed
4456                         my $mode_chnge = "";
4457                         if ($diff->{'from_mode'} != $diff->{'to_mode'}) {
4458                                 $mode_chnge = "<span class=\"file_status mode_chnge\">[changed";
4459                                 if ($from_file_type ne $to_file_type) {
4460                                         $mode_chnge .= " from $from_file_type to $to_file_type";
4461                                 }
4462                                 if (($from_mode_oct & 0777) != ($to_mode_oct & 0777)) {
4463                                         if ($from_mode_str && $to_mode_str) {
4464                                                 $mode_chnge .= " mode: $from_mode_str->$to_mode_str";
4465                                         } elsif ($to_mode_str) {
4466                                                 $mode_chnge .= " mode: $to_mode_str";
4467                                         }
4468                                 }
4469                                 $mode_chnge .= "]</span>\n";
4470                         }
4471                         print "<td>";
4472                         print $cgi->a({-href => href(action=>"blob", hash=>$diff->{'to_id'},
4473                                                      hash_base=>$hash, file_name=>$diff->{'file'}),
4474                                       -class => "list"}, esc_path($diff->{'file'}));
4475                         print "</td>\n";
4476                         print "<td>$mode_chnge</td>\n";
4477                         print "<td class=\"link\">";
4478                         if ($action eq 'commitdiff') {
4479                                 # link to patch
4480                                 $patchno++;
4481                                 print $cgi->a({-href => "#patch$patchno"}, "patch") .
4482                                       " | ";
4483                         } elsif ($diff->{'to_id'} ne $diff->{'from_id'}) {
4484                                 # "commit" view and modified file (not onlu mode changed)
4485                                 print $cgi->a({-href => href(action=>"blobdiff",
4486                                                              hash=>$diff->{'to_id'}, hash_parent=>$diff->{'from_id'},
4487                                                              hash_base=>$hash, hash_parent_base=>$parent,
4488                                                              file_name=>$diff->{'file'})},
4489                                               "diff") .
4490                                       " | ";
4491                         }
4492                         print $cgi->a({-href => href(action=>"blob", hash=>$diff->{'to_id'},
4493                                                      hash_base=>$hash, file_name=>$diff->{'file'})},
4494                                        "blob") . " | ";
4495                         if ($have_blame) {
4496                                 print $cgi->a({-href => href(action=>"blame", hash_base=>$hash,
4497                                                              file_name=>$diff->{'file'})},
4498                                               "blame") . " | ";
4499                         }
4500                         print $cgi->a({-href => href(action=>"history", hash_base=>$hash,
4501                                                      file_name=>$diff->{'file'})},
4502                                       "history");
4503                         print "</td>\n";
4504
4505                 } elsif ($diff->{'status'} eq "R" || $diff->{'status'} eq "C") { # renamed or copied
4506                         my %status_name = ('R' => 'moved', 'C' => 'copied');
4507                         my $nstatus = $status_name{$diff->{'status'}};
4508                         my $mode_chng = "";
4509                         if ($diff->{'from_mode'} != $diff->{'to_mode'}) {
4510                                 # mode also for directories, so we cannot use $to_mode_str
4511                                 $mode_chng = sprintf(", mode: %04o", $to_mode_oct & 0777);
4512                         }
4513                         print "<td>" .
4514                               $cgi->a({-href => href(action=>"blob", hash_base=>$hash,
4515                                                      hash=>$diff->{'to_id'}, file_name=>$diff->{'to_file'}),
4516                                       -class => "list"}, esc_path($diff->{'to_file'})) . "</td>\n" .
4517                               "<td><span class=\"file_status $nstatus\">[$nstatus from " .
4518                               $cgi->a({-href => href(action=>"blob", hash_base=>$parent,
4519                                                      hash=>$diff->{'from_id'}, file_name=>$diff->{'from_file'}),
4520                                       -class => "list"}, esc_path($diff->{'from_file'})) .
4521                               " with " . (int $diff->{'similarity'}) . "% similarity$mode_chng]</span></td>\n" .
4522                               "<td class=\"link\">";
4523                         if ($action eq 'commitdiff') {
4524                                 # link to patch
4525                                 $patchno++;
4526                                 print $cgi->a({-href => "#patch$patchno"}, "patch") .
4527                                       " | ";
4528                         } elsif ($diff->{'to_id'} ne $diff->{'from_id'}) {
4529                                 # "commit" view and modified file (not only pure rename or copy)
4530                                 print $cgi->a({-href => href(action=>"blobdiff",
4531                                                              hash=>$diff->{'to_id'}, hash_parent=>$diff->{'from_id'},
4532                                                              hash_base=>$hash, hash_parent_base=>$parent,
4533                                                              file_name=>$diff->{'to_file'}, file_parent=>$diff->{'from_file'})},
4534                                               "diff") .
4535                                       " | ";
4536                         }
4537                         print $cgi->a({-href => href(action=>"blob", hash=>$diff->{'to_id'},
4538                                                      hash_base=>$parent, file_name=>$diff->{'to_file'})},
4539                                       "blob") . " | ";
4540                         if ($have_blame) {
4541                                 print $cgi->a({-href => href(action=>"blame", hash_base=>$hash,
4542                                                              file_name=>$diff->{'to_file'})},
4543                                               "blame") . " | ";
4544                         }
4545                         print $cgi->a({-href => href(action=>"history", hash_base=>$hash,
4546                                                     file_name=>$diff->{'to_file'})},
4547                                       "history");
4548                         print "</td>\n";
4549
4550                 } # we should not encounter Unmerged (U) or Unknown (X) status
4551                 print "</tr>\n";
4552         }
4553         print "</tbody>" if $has_header;
4554         print "</table>\n";
4555 }
4556
4557 sub git_patchset_body {
4558         my ($fd, $difftree, $hash, @hash_parents) = @_;
4559         my ($hash_parent) = $hash_parents[0];
4560
4561         my $is_combined = (@hash_parents > 1);
4562         my $patch_idx = 0;
4563         my $patch_number = 0;
4564         my $patch_line;
4565         my $diffinfo;
4566         my $to_name;
4567         my (%from, %to);
4568
4569         print "<div class=\"patchset\">\n";
4570
4571         # skip to first patch
4572         while ($patch_line = <$fd>) {
4573                 chomp $patch_line;
4574
4575                 last if ($patch_line =~ m/^diff /);
4576         }
4577
4578  PATCH:
4579         while ($patch_line) {
4580
4581                 # parse "git diff" header line
4582                 if ($patch_line =~ m/^diff --git (\"(?:[^\\\"]*(?:\\.[^\\\"]*)*)\"|[^ "]*) (.*)$/) {
4583                         # $1 is from_name, which we do not use
4584                         $to_name = unquote($2);
4585                         $to_name =~ s!^b/!!;
4586                 } elsif ($patch_line =~ m/^diff --(cc|combined) ("?.*"?)$/) {
4587                         # $1 is 'cc' or 'combined', which we do not use
4588                         $to_name = unquote($2);
4589                 } else {
4590                         $to_name = undef;
4591                 }
4592
4593                 # check if current patch belong to current raw line
4594                 # and parse raw git-diff line if needed
4595                 if (is_patch_split($diffinfo, { 'to_file' => $to_name })) {
4596                         # this is continuation of a split patch
4597                         print "<div class=\"patch cont\">\n";
4598                 } else {
4599                         # advance raw git-diff output if needed
4600                         $patch_idx++ if defined $diffinfo;
4601
4602                         # read and prepare patch information
4603                         $diffinfo = parsed_difftree_line($difftree->[$patch_idx]);
4604
4605                         # compact combined diff output can have some patches skipped
4606                         # find which patch (using pathname of result) we are at now;
4607                         if ($is_combined) {
4608                                 while ($to_name ne $diffinfo->{'to_file'}) {
4609                                         print "<div class=\"patch\" id=\"patch". ($patch_idx+1) ."\">\n" .
4610                                               format_diff_cc_simplified($diffinfo, @hash_parents) .
4611                                               "</div>\n";  # class="patch"
4612
4613                                         $patch_idx++;
4614                                         $patch_number++;
4615
4616                                         last if $patch_idx > $#$difftree;
4617                                         $diffinfo = parsed_difftree_line($difftree->[$patch_idx]);
4618                                 }
4619                         }
4620
4621                         # modifies %from, %to hashes
4622                         parse_from_to_diffinfo($diffinfo, \%from, \%to, @hash_parents);
4623
4624                         # this is first patch for raw difftree line with $patch_idx index
4625                         # we index @$difftree array from 0, but number patches from 1
4626                         print "<div class=\"patch\" id=\"patch". ($patch_idx+1) ."\">\n";
4627                 }
4628
4629                 # git diff header
4630                 #assert($patch_line =~ m/^diff /) if DEBUG;
4631                 #assert($patch_line !~ m!$/$!) if DEBUG; # is chomp-ed
4632                 $patch_number++;
4633                 # print "git diff" header
4634                 print format_git_diff_header_line($patch_line, $diffinfo,
4635                                                   \%from, \%to);
4636
4637                 # print extended diff header
4638                 print "<div class=\"diff extended_header\">\n";
4639         EXTENDED_HEADER:
4640                 while ($patch_line = <$fd>) {
4641                         chomp $patch_line;
4642
4643                         last EXTENDED_HEADER if ($patch_line =~ m/^--- |^diff /);
4644
4645                         print format_extended_diff_header_line($patch_line, $diffinfo,
4646                                                                \%from, \%to);
4647                 }
4648                 print "</div>\n"; # class="diff extended_header"
4649
4650                 # from-file/to-file diff header
4651                 if (! $patch_line) {
4652                         print "</div>\n"; # class="patch"
4653                         last PATCH;
4654                 }
4655                 next PATCH if ($patch_line =~ m/^diff /);
4656                 #assert($patch_line =~ m/^---/) if DEBUG;
4657
4658                 my $last_patch_line = $patch_line;
4659                 $patch_line = <$fd>;
4660                 chomp $patch_line;
4661                 #assert($patch_line =~ m/^\+\+\+/) if DEBUG;
4662
4663                 print format_diff_from_to_header($last_patch_line, $patch_line,
4664                                                  $diffinfo, \%from, \%to,
4665                                                  @hash_parents);
4666
4667                 # the patch itself
4668         LINE:
4669                 while ($patch_line = <$fd>) {
4670                         chomp $patch_line;
4671
4672                         next PATCH if ($patch_line =~ m/^diff /);
4673
4674                         print format_diff_line($patch_line, \%from, \%to);
4675                 }
4676
4677         } continue {
4678                 print "</div>\n"; # class="patch"
4679         }
4680
4681         # for compact combined (--cc) format, with chunk and patch simplification
4682         # the patchset might be empty, but there might be unprocessed raw lines
4683         for (++$patch_idx if $patch_number > 0;
4684              $patch_idx < @$difftree;
4685              ++$patch_idx) {
4686                 # read and prepare patch information
4687                 $diffinfo = parsed_difftree_line($difftree->[$patch_idx]);
4688
4689                 # generate anchor for "patch" links in difftree / whatchanged part
4690                 print "<div class=\"patch\" id=\"patch". ($patch_idx+1) ."\">\n" .
4691                       format_diff_cc_simplified($diffinfo, @hash_parents) .
4692                       "</div>\n";  # class="patch"
4693
4694                 $patch_number++;
4695         }
4696
4697         if ($patch_number == 0) {
4698                 if (@hash_parents > 1) {
4699                         print "<div class=\"diff nodifferences\">Trivial merge</div>\n";
4700                 } else {
4701                         print "<div class=\"diff nodifferences\">No differences found</div>\n";
4702                 }
4703         }
4704
4705         print "</div>\n"; # class="patchset"
4706 }
4707
4708 # . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
4709
4710 # fills project list info (age, description, owner, forks) for each
4711 # project in the list, removing invalid projects from returned list
4712 # NOTE: modifies $projlist, but does not remove entries from it
4713 sub fill_project_list_info {
4714         my ($projlist, $check_forks) = @_;
4715         my @projects;
4716
4717         my $show_ctags = gitweb_check_feature('ctags');
4718  PROJECT:
4719         foreach my $pr (@$projlist) {
4720                 my (@activity) = git_get_last_activity($pr->{'path'});
4721                 unless (@activity) {
4722                         next PROJECT;
4723                 }
4724                 ($pr->{'age'}, $pr->{'age_string'}) = @activity;
4725                 if (!defined $pr->{'descr'}) {
4726                         my $descr = git_get_project_description($pr->{'path'}) || "";
4727                         $descr = to_utf8($descr);
4728                         $pr->{'descr_long'} = $descr;
4729                         $pr->{'descr'} = chop_str($descr, $projects_list_description_width, 5);
4730                 }
4731                 if (!defined $pr->{'owner'}) {
4732                         $pr->{'owner'} = git_get_project_owner("$pr->{'path'}") || "";
4733                 }
4734                 if ($check_forks) {
4735                         my $pname = $pr->{'path'};
4736                         if (($pname =~ s/\.git$//) &&
4737                             ($pname !~ /\/$/) &&
4738                             (-d "$projectroot/$pname")) {
4739                                 $pr->{'forks'} = "-d $projectroot/$pname";
4740                         } else {
4741                                 $pr->{'forks'} = 0;
4742                         }
4743                 }
4744                 $show_ctags and $pr->{'ctags'} = git_get_project_ctags($pr->{'path'});
4745                 push @projects, $pr;
4746         }
4747
4748         return @projects;
4749 }
4750
4751 # print 'sort by' <th> element, generating 'sort by $name' replay link
4752 # if that order is not selected
4753 sub print_sort_th {
4754         print format_sort_th(@_);
4755 }
4756
4757 sub format_sort_th {
4758         my ($name, $order, $header) = @_;
4759         my $sort_th = "";
4760         $header ||= ucfirst($name);
4761
4762         if ($order eq $name) {
4763                 $sort_th .= "<th>$header</th>\n";
4764         } else {
4765                 $sort_th .= "<th>" .
4766                             $cgi->a({-href => href(-replay=>1, order=>$name),
4767                                      -class => "header"}, $header) .
4768                             "</th>\n";
4769         }
4770
4771         return $sort_th;
4772 }
4773
4774 sub git_project_list_body {
4775         # actually uses global variable $project
4776         my ($projlist, $order, $from, $to, $extra, $no_header) = @_;
4777
4778         my $check_forks = gitweb_check_feature('forks');
4779         my @projects = fill_project_list_info($projlist, $check_forks);
4780
4781         $order ||= $default_projects_order;
4782         $from = 0 unless defined $from;
4783         $to = $#projects if (!defined $to || $#projects < $to);
4784
4785         my %order_info = (
4786                 project => { key => 'path', type => 'str' },
4787                 descr => { key => 'descr_long', type => 'str' },
4788                 owner => { key => 'owner', type => 'str' },
4789                 age => { key => 'age', type => 'num' }
4790         );
4791         my $oi = $order_info{$order};
4792         if ($oi->{'type'} eq 'str') {
4793                 @projects = sort {$a->{$oi->{'key'}} cmp $b->{$oi->{'key'}}} @projects;
4794         } else {
4795                 @projects = sort {$a->{$oi->{'key'}} <=> $b->{$oi->{'key'}}} @projects;
4796         }
4797
4798         my $show_ctags = gitweb_check_feature('ctags');
4799         if ($show_ctags) {
4800                 my %ctags;
4801                 foreach my $p (@projects) {
4802                         foreach my $ct (keys %{$p->{'ctags'}}) {
4803                                 $ctags{$ct} += $p->{'ctags'}->{$ct};
4804                         }
4805                 }
4806                 my $cloud = git_populate_project_tagcloud(\%ctags);
4807                 print git_show_project_tagcloud($cloud, 64);
4808         }
4809
4810         print "<table class=\"project_list\">\n";
4811         unless ($no_header) {
4812                 print "<tr>\n";
4813                 if ($check_forks) {
4814                         print "<th></th>\n";
4815                 }
4816                 print_sort_th('project', $order, 'Project');
4817                 print_sort_th('descr', $order, 'Description');
4818                 print_sort_th('owner', $order, 'Owner');
4819                 print_sort_th('age', $order, 'Last Change');
4820                 print "<th></th>\n" . # for links
4821                       "</tr>\n";
4822         }
4823         my $alternate = 1;
4824         my $tagfilter = $cgi->param('by_tag');
4825         for (my $i = $from; $i <= $to; $i++) {
4826                 my $pr = $projects[$i];
4827
4828                 next if $tagfilter and $show_ctags and not grep { lc $_ eq lc $tagfilter } keys %{$pr->{'ctags'}};
4829                 next if $searchtext and not $pr->{'path'} =~ /$searchtext/
4830                         and not $pr->{'descr_long'} =~ /$searchtext/;
4831                 # Weed out forks or non-matching entries of search
4832                 if ($check_forks) {
4833                         my $forkbase = $project; $forkbase ||= ''; $forkbase =~ s#\.git$#/#;
4834                         $forkbase="^$forkbase" if $forkbase;
4835                         next if not $searchtext and not $tagfilter and $show_ctags
4836                                 and $pr->{'path'} =~ m#$forkbase.*/.*#; # regexp-safe
4837                 }
4838
4839                 if ($alternate) {
4840                         print "<tr class=\"dark\">\n";
4841                 } else {
4842                         print "<tr class=\"light\">\n";
4843                 }
4844                 $alternate ^= 1;
4845                 if ($check_forks) {
4846                         print "<td>";
4847                         if ($pr->{'forks'}) {
4848                                 print "<!-- $pr->{'forks'} -->\n";
4849                                 print $cgi->a({-href => href(project=>$pr->{'path'}, action=>"forks")}, "+");
4850                         }
4851                         print "</td>\n";
4852                 }
4853                 print "<td>" . $cgi->a({-href => href(project=>$pr->{'path'}, action=>"summary"),
4854                                         -class => "list"}, esc_html($pr->{'path'})) . "</td>\n" .
4855                       "<td>" . $cgi->a({-href => href(project=>$pr->{'path'}, action=>"summary"),
4856                                         -class => "list", -title => $pr->{'descr_long'}},
4857                                         esc_html($pr->{'descr'})) . "</td>\n" .
4858                       "<td><i>" . chop_and_escape_str($pr->{'owner'}, 15) . "</i></td>\n";
4859                 print "<td class=\"". age_class($pr->{'age'}) . "\">" .
4860                       (defined $pr->{'age_string'} ? $pr->{'age_string'} : "No commits") . "</td>\n" .
4861                       "<td class=\"link\">" .
4862                       $cgi->a({-href => href(project=>$pr->{'path'}, action=>"summary")}, "summary")   . " | " .
4863                       $cgi->a({-href => href(project=>$pr->{'path'}, action=>"shortlog")}, "shortlog") . " | " .
4864                       $cgi->a({-href => href(project=>$pr->{'path'}, action=>"log")}, "log") . " | " .
4865                       $cgi->a({-href => href(project=>$pr->{'path'}, action=>"tree")}, "tree") .
4866                       ($pr->{'forks'} ? " | " . $cgi->a({-href => href(project=>$pr->{'path'}, action=>"forks")}, "forks") : '') .
4867                       "</td>\n" .
4868                       "</tr>\n";
4869         }
4870         if (defined $extra) {
4871                 print "<tr>\n";
4872                 if ($check_forks) {
4873                         print "<td></td>\n";
4874                 }
4875                 print "<td colspan=\"5\">$extra</td>\n" .
4876                       "</tr>\n";
4877         }
4878         print "</table>\n";
4879 }
4880
4881 sub git_log_body {
4882         # uses global variable $project
4883         my ($commitlist, $from, $to, $refs, $extra) = @_;
4884
4885         $from = 0 unless defined $from;
4886         $to = $#{$commitlist} if (!defined $to || $#{$commitlist} < $to);
4887
4888         for (my $i = 0; $i <= $to; $i++) {
4889                 my %co = %{$commitlist->[$i]};
4890                 next if !%co;
4891                 my $commit = $co{'id'};
4892                 my $ref = format_ref_marker($refs, $commit);
4893                 my %ad = parse_date($co{'author_epoch'});
4894                 git_print_header_div('commit',
4895                                "<span class=\"age\">$co{'age_string'}</span>" .
4896                                esc_html($co{'title'}) . $ref,
4897                                $commit);
4898                 print "<div class=\"title_text\">\n" .
4899                       "<div class=\"log_link\">\n" .
4900                       $cgi->a({-href => href(action=>"commit", hash=>$commit)}, "commit") .
4901                       " | " .
4902                       $cgi->a({-href => href(action=>"commitdiff", hash=>$commit)}, "commitdiff") .
4903                       " | " .
4904                       $cgi->a({-href => href(action=>"tree", hash=>$commit, hash_base=>$commit)}, "tree") .
4905                       "<br/>\n" .
4906                       "</div>\n";
4907                       git_print_authorship(\%co, -tag => 'span');
4908                       print "<br/>\n</div>\n";
4909
4910                 print "<div class=\"log_body\">\n";
4911                 git_print_log($co{'comment'}, -final_empty_line=> 1);
4912                 print "</div>\n";
4913         }
4914         if ($extra) {
4915                 print "<div class=\"page_nav\">\n";
4916                 print "$extra\n";
4917                 print "</div>\n";
4918         }
4919 }
4920
4921 sub git_shortlog_body {
4922         # uses global variable $project
4923         my ($commitlist, $from, $to, $refs, $extra) = @_;
4924
4925         $from = 0 unless defined $from;
4926         $to = $#{$commitlist} if (!defined $to || $#{$commitlist} < $to);
4927
4928         print "<table class=\"shortlog\">\n";
4929         my $alternate = 1;
4930         for (my $i = $from; $i <= $to; $i++) {
4931                 my %co = %{$commitlist->[$i]};
4932                 my $commit = $co{'id'};
4933                 my $ref = format_ref_marker($refs, $commit);
4934                 if ($alternate) {
4935                         print "<tr class=\"dark\">\n";
4936                 } else {
4937                         print "<tr class=\"light\">\n";
4938                 }
4939                 $alternate ^= 1;
4940                 # git_summary() used print "<td><i>$co{'age_string'}</i></td>\n" .
4941                 print "<td title=\"$co{'age_string_age'}\"><i>$co{'age_string_date'}</i></td>\n" .
4942                       format_author_html('td', \%co, 10) . "<td>";
4943                 print format_subject_html($co{'title'}, $co{'title_short'},
4944                                           href(action=>"commit", hash=>$commit), $ref);
4945                 print "</td>\n" .
4946                       "<td class=\"link\">" .
4947                       $cgi->a({-href => href(action=>"commit", hash=>$commit)}, "commit") . " | " .
4948                       $cgi->a({-href => href(action=>"commitdiff", hash=>$commit)}, "commitdiff") . " | " .
4949                       $cgi->a({-href => href(action=>"tree", hash=>$commit, hash_base=>$commit)}, "tree");
4950                 my $snapshot_links = format_snapshot_links($commit);
4951                 if (defined $snapshot_links) {
4952                         print " | " . $snapshot_links;
4953                 }
4954                 print "</td>\n" .
4955                       "</tr>\n";
4956         }
4957         if (defined $extra) {
4958                 print "<tr>\n" .
4959                       "<td colspan=\"4\">$extra</td>\n" .
4960                       "</tr>\n";
4961         }
4962         print "</table>\n";
4963 }
4964
4965 sub git_history_body {
4966         # Warning: assumes constant type (blob or tree) during history
4967         my ($commitlist, $from, $to, $refs, $extra,
4968             $file_name, $file_hash, $ftype) = @_;
4969
4970         $from = 0 unless defined $from;
4971         $to = $#{$commitlist} unless (defined $to && $to <= $#{$commitlist});
4972
4973         print "<table class=\"history\">\n";
4974         my $alternate = 1;
4975         for (my $i = $from; $i <= $to; $i++) {
4976                 my %co = %{$commitlist->[$i]};
4977                 if (!%co) {
4978                         next;
4979                 }
4980                 my $commit = $co{'id'};
4981
4982                 my $ref = format_ref_marker($refs, $commit);
4983
4984                 if ($alternate) {
4985                         print "<tr class=\"dark\">\n";
4986                 } else {
4987                         print "<tr class=\"light\">\n";
4988                 }
4989                 $alternate ^= 1;
4990                 print "<td title=\"$co{'age_string_age'}\"><i>$co{'age_string_date'}</i></td>\n" .
4991         # shortlog:   format_author_html('td', \%co, 10)
4992                       format_author_html('td', \%co, 15, 3) . "<td>";
4993                 # originally git_history used chop_str($co{'title'}, 50)
4994                 print format_subject_html($co{'title'}, $co{'title_short'},
4995                                           href(action=>"commit", hash=>$commit), $ref);
4996                 print "</td>\n" .
4997                       "<td class=\"link\">" .
4998                       $cgi->a({-href => href(action=>$ftype, hash_base=>$commit, file_name=>$file_name)}, $ftype) . " | " .
4999                       $cgi->a({-href => href(action=>"commitdiff", hash=>$commit)}, "commitdiff");
5000
5001                 if ($ftype eq 'blob') {
5002                         my $blob_current = $file_hash;
5003                         my $blob_parent  = git_get_hash_by_path($commit, $file_name);
5004                         if (defined $blob_current && defined $blob_parent &&
5005                                         $blob_current ne $blob_parent) {
5006                                 print " | " .
5007                                         $cgi->a({-href => href(action=>"blobdiff",
5008                                                                hash=>$blob_current, hash_parent=>$blob_parent,
5009                                                                hash_base=>$hash_base, hash_parent_base=>$commit,
5010                                                                file_name=>$file_name)},
5011                                                 "diff to current");
5012                         }
5013                 }
5014                 print "</td>\n" .
5015                       "</tr>\n";
5016         }
5017         if (defined $extra) {
5018                 print "<tr>\n" .
5019                       "<td colspan=\"4\">$extra</td>\n" .
5020                       "</tr>\n";
5021         }
5022         print "</table>\n";
5023 }
5024
5025 sub git_tags_body {
5026         # uses global variable $project
5027         my ($taglist, $from, $to, $extra) = @_;
5028         $from = 0 unless defined $from;
5029         $to = $#{$taglist} if (!defined $to || $#{$taglist} < $to);
5030
5031         print "<table class=\"tags\">\n";
5032         my $alternate = 1;
5033         for (my $i = $from; $i <= $to; $i++) {
5034                 my $entry = $taglist->[$i];
5035                 my %tag = %$entry;
5036                 my $comment = $tag{'subject'};
5037                 my $comment_short;
5038                 if (defined $comment) {
5039                         $comment_short = chop_str($comment, 30, 5);
5040                 }
5041                 if ($alternate) {
5042                         print "<tr class=\"dark\">\n";
5043                 } else {
5044                         print "<tr class=\"light\">\n";
5045                 }
5046                 $alternate ^= 1;
5047                 if (defined $tag{'age'}) {
5048                         print "<td><i>$tag{'age'}</i></td>\n";
5049                 } else {
5050                         print "<td></td>\n";
5051                 }
5052                 print "<td>" .
5053                       $cgi->a({-href => href(action=>$tag{'reftype'}, hash=>$tag{'refid'}),
5054                                -class => "list name"}, esc_html($tag{'name'})) .
5055                       "</td>\n" .
5056                       "<td>";
5057                 if (defined $comment) {
5058                         print format_subject_html($comment, $comment_short,
5059                                                   href(action=>"tag", hash=>$tag{'id'}));
5060                 }
5061                 print "</td>\n" .
5062                       "<td class=\"selflink\">";
5063                 if ($tag{'type'} eq "tag") {
5064                         print $cgi->a({-href => href(action=>"tag", hash=>$tag{'id'})}, "tag");
5065                 } else {
5066                         print "&nbsp;";
5067                 }
5068                 print "</td>\n" .
5069                       "<td class=\"link\">" . " | " .
5070                       $cgi->a({-href => href(action=>$tag{'reftype'}, hash=>$tag{'refid'})}, $tag{'reftype'});
5071                 if ($tag{'reftype'} eq "commit") {
5072                         print " | " . $cgi->a({-href => href(action=>"shortlog", hash=>$tag{'fullname'})}, "shortlog") .
5073                               " | " . $cgi->a({-href => href(action=>"log", hash=>$tag{'fullname'})}, "log");
5074                 } elsif ($tag{'reftype'} eq "blob") {
5075                         print " | " . $cgi->a({-href => href(action=>"blob_plain", hash=>$tag{'refid'})}, "raw");
5076                 }
5077                 print "</td>\n" .
5078                       "</tr>";
5079         }
5080         if (defined $extra) {
5081                 print "<tr>\n" .
5082                       "<td colspan=\"5\">$extra</td>\n" .
5083                       "</tr>\n";
5084         }
5085         print "</table>\n";
5086 }
5087
5088 sub git_heads_body {
5089         # uses global variable $project
5090         my ($headlist, $head, $from, $to, $extra) = @_;
5091         $from = 0 unless defined $from;
5092         $to = $#{$headlist} if (!defined $to || $#{$headlist} < $to);
5093
5094         print "<table class=\"heads\">\n";
5095         my $alternate = 1;
5096         for (my $i = $from; $i <= $to; $i++) {
5097                 my $entry = $headlist->[$i];
5098                 my %ref = %$entry;
5099                 my $curr = $ref{'id'} eq $head;
5100                 if ($alternate) {
5101                         print "<tr class=\"dark\">\n";
5102                 } else {
5103                         print "<tr class=\"light\">\n";
5104                 }
5105                 $alternate ^= 1;
5106                 print "<td><i>$ref{'age'}</i></td>\n" .
5107                       ($curr ? "<td class=\"current_head\">" : "<td>") .
5108                       $cgi->a({-href => href(action=>"shortlog", hash=>$ref{'fullname'}),
5109                                -class => "list name"},esc_html($ref{'name'})) .
5110                       "</td>\n" .
5111                       "<td class=\"link\">" .
5112                       $cgi->a({-href => href(action=>"shortlog", hash=>$ref{'fullname'})}, "shortlog") . " | " .
5113                       $cgi->a({-href => href(action=>"log", hash=>$ref{'fullname'})}, "log") . " | " .
5114                       $cgi->a({-href => href(action=>"tree", hash=>$ref{'fullname'}, hash_base=>$ref{'fullname'})}, "tree") .
5115                       "</td>\n" .
5116                       "</tr>";
5117         }
5118         if (defined $extra) {
5119                 print "<tr>\n" .
5120                       "<td colspan=\"3\">$extra</td>\n" .
5121                       "</tr>\n";
5122         }
5123         print "</table>\n";
5124 }
5125
5126 # Display a single remote block
5127 sub git_remote_block {
5128         my ($remote, $rdata, $limit, $head) = @_;
5129
5130         my $heads = $rdata->{'heads'};
5131         my $fetch = $rdata->{'fetch'};
5132         my $push = $rdata->{'push'};
5133
5134         my $urls_table = "<table class=\"projects_list\">\n" ;
5135
5136         if (defined $fetch) {
5137                 if ($fetch eq $push) {
5138                         $urls_table .= format_repo_url("URL", $fetch);
5139                 } else {
5140                         $urls_table .= format_repo_url("Fetch URL", $fetch);
5141                         $urls_table .= format_repo_url("Push URL", $push) if defined $push;
5142                 }
5143         } elsif (defined $push) {
5144                 $urls_table .= format_repo_url("Push URL", $push);
5145         } else {
5146                 $urls_table .= format_repo_url("", "No remote URL");
5147         }
5148
5149         $urls_table .= "</table>\n";
5150
5151         my $dots;
5152         if (defined $limit && $limit < @$heads) {
5153                 $dots = $cgi->a({-href => href(action=>"remotes", hash=>$remote)}, "...");
5154         }
5155
5156         print $urls_table;
5157         git_heads_body($heads, $head, 0, $limit, $dots);
5158 }
5159
5160 # Display a list of remote names with the respective fetch and push URLs
5161 sub git_remotes_list {
5162         my ($remotedata, $limit) = @_;
5163         print "<table class=\"heads\">\n";
5164         my $alternate = 1;
5165         my @remotes = sort keys %$remotedata;
5166
5167         my $limited = $limit && $limit < @remotes;
5168
5169         $#remotes = $limit - 1 if $limited;
5170
5171         while (my $remote = shift @remotes) {
5172                 my $rdata = $remotedata->{$remote};
5173                 my $fetch = $rdata->{'fetch'};
5174                 my $push = $rdata->{'push'};
5175                 if ($alternate) {
5176                         print "<tr class=\"dark\">\n";
5177                 } else {
5178                         print "<tr class=\"light\">\n";
5179                 }
5180                 $alternate ^= 1;
5181                 print "<td>" .
5182                       $cgi->a({-href=> href(action=>'remotes', hash=>$remote),
5183                                -class=> "list name"},esc_html($remote)) .
5184                       "</td>";
5185                 print "<td class=\"link\">" .
5186                       (defined $fetch ? $cgi->a({-href=> $fetch}, "fetch") : "fetch") .
5187                       " | " .
5188                       (defined $push ? $cgi->a({-href=> $push}, "push") : "push") .
5189                       "</td>";
5190
5191                 print "</tr>\n";
5192         }
5193
5194         if ($limited) {
5195                 print "<tr>\n" .
5196                       "<td colspan=\"3\">" .
5197                       $cgi->a({-href => href(action=>"remotes")}, "...") .
5198                       "</td>\n" . "</tr>\n";
5199         }
5200
5201         print "</table>";
5202 }
5203
5204 # Display remote heads grouped by remote, unless there are too many
5205 # remotes, in which case we only display the remote names
5206 sub git_remotes_body {
5207         my ($remotedata, $limit, $head) = @_;
5208         if ($limit and $limit < keys %$remotedata) {
5209                 git_remotes_list($remotedata, $limit);
5210         } else {
5211                 fill_remote_heads($remotedata);
5212                 while (my ($remote, $rdata) = each %$remotedata) {
5213                         git_print_section({-class=>"remote", -id=>$remote},
5214                                 ["remotes", $remote, $remote], sub {
5215                                         git_remote_block($remote, $rdata, $limit, $head);
5216                                 });
5217                 }
5218         }
5219 }
5220
5221 sub git_search_grep_body {
5222         my ($commitlist, $from, $to, $extra) = @_;
5223         $from = 0 unless defined $from;
5224         $to = $#{$commitlist} if (!defined $to || $#{$commitlist} < $to);
5225
5226         print "<table class=\"commit_search\">\n";
5227         my $alternate = 1;
5228         for (my $i = $from; $i <= $to; $i++) {
5229                 my %co = %{$commitlist->[$i]};
5230                 if (!%co) {
5231                         next;
5232                 }
5233                 my $commit = $co{'id'};
5234                 if ($alternate) {
5235                         print "<tr class=\"dark\">\n";
5236                 } else {
5237                         print "<tr class=\"light\">\n";
5238                 }
5239                 $alternate ^= 1;
5240                 print "<td title=\"$co{'age_string_age'}\"><i>$co{'age_string_date'}</i></td>\n" .
5241                       format_author_html('td', \%co, 15, 5) .
5242                       "<td>" .
5243                       $cgi->a({-href => href(action=>"commit", hash=>$co{'id'}),
5244                                -class => "list subject"},
5245                               chop_and_escape_str($co{'title'}, 50) . "<br/>");
5246                 my $comment = $co{'comment'};
5247                 foreach my $line (@$comment) {
5248                         if ($line =~ m/^(.*?)($search_regexp)(.*)$/i) {
5249                                 my ($lead, $match, $trail) = ($1, $2, $3);
5250                                 $match = chop_str($match, 70, 5, 'center');
5251                                 my $contextlen = int((80 - length($match))/2);
5252                                 $contextlen = 30 if ($contextlen > 30);
5253                                 $lead  = chop_str($lead,  $contextlen, 10, 'left');
5254                                 $trail = chop_str($trail, $contextlen, 10, 'right');
5255
5256                                 $lead  = esc_html($lead);
5257                                 $match = esc_html($match);
5258                                 $trail = esc_html($trail);
5259
5260                                 print "$lead<span class=\"match\">$match</span>$trail<br />";
5261                         }
5262                 }
5263                 print "</td>\n" .
5264                       "<td class=\"link\">" .
5265                       $cgi->a({-href => href(action=>"commit", hash=>$co{'id'})}, "commit") .
5266                       " | " .
5267                       $cgi->a({-href => href(action=>"commitdiff", hash=>$co{'id'})}, "commitdiff") .
5268                       " | " .
5269                       $cgi->a({-href => href(action=>"tree", hash=>$co{'tree'}, hash_base=>$co{'id'})}, "tree");
5270                 print "</td>\n" .
5271                       "</tr>\n";
5272         }
5273         if (defined $extra) {
5274                 print "<tr>\n" .
5275                       "<td colspan=\"3\">$extra</td>\n" .
5276                       "</tr>\n";
5277         }
5278         print "</table>\n";
5279 }
5280
5281 ## ======================================================================
5282 ## ======================================================================
5283 ## actions
5284
5285 sub git_project_list {
5286         my $order = $input_params{'order'};
5287         if (defined $order && $order !~ m/none|project|descr|owner|age/) {
5288                 die_error(400, "Unknown order parameter");
5289         }
5290
5291         my @list = git_get_projects_list();
5292         if (!@list) {
5293                 die_error(404, "No projects found");
5294         }
5295
5296         git_header_html();
5297         if (defined $home_text && -f $home_text) {
5298                 print "<div class=\"index_include\">\n";
5299                 insert_file($home_text);
5300                 print "</div>\n";
5301         }
5302         print $cgi->startform(-method => "get") .
5303               "<p class=\"projsearch\">Search:\n" .
5304               $cgi->textfield(-name => "s", -value => $searchtext) . "\n" .
5305               "</p>" .
5306               $cgi->end_form() . "\n";
5307         git_project_list_body(\@list, $order);
5308         git_footer_html();
5309 }
5310
5311 sub git_forks {
5312         my $order = $input_params{'order'};
5313         if (defined $order && $order !~ m/none|project|descr|owner|age/) {
5314                 die_error(400, "Unknown order parameter");
5315         }
5316
5317         my @list = git_get_projects_list($project);
5318         if (!@list) {
5319                 die_error(404, "No forks found");
5320         }
5321
5322         git_header_html();
5323         git_print_page_nav('','');
5324         git_print_header_div('summary', "$project forks");
5325         git_project_list_body(\@list, $order);
5326         git_footer_html();
5327 }
5328
5329 sub git_project_index {
5330         my @projects = git_get_projects_list($project);
5331
5332         print $cgi->header(
5333                 -type => 'text/plain',
5334                 -charset => 'utf-8',
5335                 -content_disposition => 'inline; filename="index.aux"');
5336
5337         foreach my $pr (@projects) {
5338                 if (!exists $pr->{'owner'}) {
5339                         $pr->{'owner'} = git_get_project_owner("$pr->{'path'}");
5340                 }
5341
5342                 my ($path, $owner) = ($pr->{'path'}, $pr->{'owner'});
5343                 # quote as in CGI::Util::encode, but keep the slash, and use '+' for ' '
5344                 $path  =~ s/([^a-zA-Z0-9_.\-\/ ])/sprintf("%%%02X", ord($1))/eg;
5345                 $owner =~ s/([^a-zA-Z0-9_.\-\/ ])/sprintf("%%%02X", ord($1))/eg;
5346                 $path  =~ s/ /\+/g;
5347                 $owner =~ s/ /\+/g;
5348
5349                 print "$path $owner\n";
5350         }
5351 }
5352
5353 sub git_summary {
5354         my $descr = git_get_project_description($project) || "none";
5355         my %co = parse_commit("HEAD");
5356         my %cd = %co ? parse_date($co{'committer_epoch'}, $co{'committer_tz'}) : ();
5357         my $head = $co{'id'};
5358         my $remote_heads = gitweb_check_feature('remote_heads');
5359
5360         my $owner = git_get_project_owner($project);
5361
5362         my $refs = git_get_references();
5363         # These get_*_list functions return one more to allow us to see if
5364         # there are more ...
5365         my @taglist  = git_get_tags_list(16);
5366         my @headlist = git_get_heads_list(16);
5367         my %remotedata = $remote_heads ? git_get_remotes_list() : ();
5368         my @forklist;
5369         my $check_forks = gitweb_check_feature('forks');
5370
5371         if ($check_forks) {
5372                 @forklist = git_get_projects_list($project);
5373         }
5374
5375         git_header_html();
5376         git_print_page_nav('summary','', $head);
5377
5378         print "<div class=\"title\">&nbsp;</div>\n";
5379         print "<table class=\"projects_list\">\n" .
5380               "<tr id=\"metadata_desc\"><td>description</td><td>" . esc_html($descr) . "</td></tr>\n" .
5381               "<tr id=\"metadata_owner\"><td>owner</td><td>" . esc_html($owner) . "</td></tr>\n";
5382         if (defined $cd{'rfc2822'}) {
5383                 print "<tr id=\"metadata_lchange\"><td>last change</td><td>$cd{'rfc2822'}</td></tr>\n";
5384         }
5385
5386         # use per project git URL list in $projectroot/$project/cloneurl
5387         # or make project git URL from git base URL and project name
5388         my $url_tag = "URL";
5389         my @url_list = git_get_project_url_list($project);
5390         @url_list = map { "$_/$project" } @git_base_url_list unless @url_list;
5391         foreach my $git_url (@url_list) {
5392                 next unless $git_url;
5393                 print format_repo_url($url_tag, $git_url);
5394                 $url_tag = "";
5395         }
5396
5397         # Tag cloud
5398         my $show_ctags = gitweb_check_feature('ctags');
5399         if ($show_ctags) {
5400                 my $ctags = git_get_project_ctags($project);
5401                 my $cloud = git_populate_project_tagcloud($ctags);
5402                 print "<tr id=\"metadata_ctags\"><td>Content tags:<br />";
5403                 print "</td>\n<td>" unless %$ctags;
5404                 print "<form action=\"$show_ctags\" method=\"post\"><input type=\"hidden\" name=\"p\" value=\"$project\" />Add: <input type=\"text\" name=\"t\" size=\"8\" /></form>";
5405                 print "</td>\n<td>" if %$ctags;
5406                 print git_show_project_tagcloud($cloud, 48);
5407                 print "</td></tr>";
5408         }
5409
5410         print "</table>\n";
5411
5412         # If XSS prevention is on, we don't include README.html.
5413         # TODO: Allow a readme in some safe format.
5414         if (!$prevent_xss && -s "$projectroot/$project/README.html") {
5415                 print "<div class=\"title\">readme</div>\n" .
5416                       "<div class=\"readme\">\n";
5417                 insert_file("$projectroot/$project/README.html");
5418                 print "\n</div>\n"; # class="readme"
5419         }
5420
5421         # we need to request one more than 16 (0..15) to check if
5422         # those 16 are all
5423         my @commitlist = $head ? parse_commits($head, 17) : ();
5424         if (@commitlist) {
5425                 git_print_header_div('shortlog');
5426                 git_shortlog_body(\@commitlist, 0, 15, $refs,
5427                                   $#commitlist <=  15 ? undef :
5428                                   $cgi->a({-href => href(action=>"shortlog")}, "..."));
5429         }
5430
5431         if (@taglist) {
5432                 git_print_header_div('tags');
5433                 git_tags_body(\@taglist, 0, 15,
5434                               $#taglist <=  15 ? undef :
5435                               $cgi->a({-href => href(action=>"tags")}, "..."));
5436         }
5437
5438         if (@headlist) {
5439                 git_print_header_div('heads');
5440                 git_heads_body(\@headlist, $head, 0, 15,
5441                                $#headlist <= 15 ? undef :
5442                                $cgi->a({-href => href(action=>"heads")}, "..."));
5443         }
5444
5445         if (%remotedata) {
5446                 git_print_header_div('remotes');
5447                 git_remotes_body(\%remotedata, 15, $head);
5448         }
5449
5450         if (@forklist) {
5451                 git_print_header_div('forks');
5452                 git_project_list_body(\@forklist, 'age', 0, 15,
5453                                       $#forklist <= 15 ? undef :
5454                                       $cgi->a({-href => href(action=>"forks")}, "..."),
5455                                       'no_header');
5456         }
5457
5458         git_footer_html();
5459 }
5460
5461 sub git_tag {
5462         my %tag = parse_tag($hash);
5463
5464         if (! %tag) {
5465                 die_error(404, "Unknown tag object");
5466         }
5467
5468         my $head = git_get_head_hash($project);
5469         git_header_html();
5470         git_print_page_nav('','', $head,undef,$head);
5471         git_print_header_div('commit', esc_html($tag{'name'}), $hash);
5472         print "<div class=\"title_text\">\n" .
5473               "<table class=\"object_header\">\n" .
5474               "<tr>\n" .
5475               "<td>object</td>\n" .
5476               "<td>" . $cgi->a({-class => "list", -href => href(action=>$tag{'type'}, hash=>$tag{'object'})},
5477                                $tag{'object'}) . "</td>\n" .
5478               "<td class=\"link\">" . $cgi->a({-href => href(action=>$tag{'type'}, hash=>$tag{'object'})},
5479                                               $tag{'type'}) . "</td>\n" .
5480               "</tr>\n";
5481         if (defined($tag{'author'})) {
5482                 git_print_authorship_rows(\%tag, 'author');
5483         }
5484         print "</table>\n\n" .
5485               "</div>\n";
5486         print "<div class=\"page_body\">";
5487         my $comment = $tag{'comment'};
5488         foreach my $line (@$comment) {
5489                 chomp $line;
5490                 print esc_html($line, -nbsp=>1) . "<br/>\n";
5491         }
5492         print "</div>\n";
5493         git_footer_html();
5494 }
5495
5496 sub git_blame_common {
5497         my $format = shift || 'porcelain';
5498         if ($format eq 'porcelain' && $cgi->param('js')) {
5499                 $format = 'incremental';
5500                 $action = 'blame_incremental'; # for page title etc
5501         }
5502
5503         # permissions
5504         gitweb_check_feature('blame')
5505                 or die_error(403, "Blame view not allowed");
5506
5507         # error checking
5508         die_error(400, "No file name given") unless $file_name;
5509         $hash_base ||= git_get_head_hash($project);
5510         die_error(404, "Couldn't find base commit") unless $hash_base;
5511         my %co = parse_commit($hash_base)
5512                 or die_error(404, "Commit not found");
5513         my $ftype = "blob";
5514         if (!defined $hash) {
5515                 $hash = git_get_hash_by_path($hash_base, $file_name, "blob")
5516                         or die_error(404, "Error looking up file");
5517         } else {
5518                 $ftype = git_get_type($hash);
5519                 if ($ftype !~ "blob") {
5520                         die_error(400, "Object is not a blob");
5521                 }
5522         }
5523
5524         my $fd;
5525         if ($format eq 'incremental') {
5526                 # get file contents (as base)
5527                 open $fd, "-|", git_cmd(), 'cat-file', 'blob', $hash
5528                         or die_error(500, "Open git-cat-file failed");
5529         } elsif ($format eq 'data') {
5530                 # run git-blame --incremental
5531                 open $fd, "-|", git_cmd(), "blame", "--incremental",
5532                         $hash_base, "--", $file_name
5533                         or die_error(500, "Open git-blame --incremental failed");
5534         } else {
5535                 # run git-blame --porcelain
5536                 open $fd, "-|", git_cmd(), "blame", '-p',
5537                         $hash_base, '--', $file_name
5538                         or die_error(500, "Open git-blame --porcelain failed");
5539         }
5540
5541         # incremental blame data returns early
5542         if ($format eq 'data') {
5543                 print $cgi->header(
5544                         -type=>"text/plain", -charset => "utf-8",
5545                         -status=> "200 OK");
5546                 local $| = 1; # output autoflush
5547                 print while <$fd>;
5548                 close $fd
5549                         or print "ERROR $!\n";
5550
5551                 print 'END';
5552                 if (defined $t0 && gitweb_check_feature('timed')) {
5553                         print ' '.
5554                               tv_interval($t0, [ gettimeofday() ]).
5555                               ' '.$number_of_git_cmds;
5556                 }
5557                 print "\n";
5558
5559                 return;
5560         }
5561
5562         # page header
5563         git_header_html();
5564         my $formats_nav =
5565                 $cgi->a({-href => href(action=>"blob", -replay=>1)},
5566                         "blob") .
5567                 " | ";
5568         if ($format eq 'incremental') {
5569                 $formats_nav .=
5570                         $cgi->a({-href => href(action=>"blame", javascript=>0, -replay=>1)},
5571                                 "blame") . " (non-incremental)";
5572         } else {
5573                 $formats_nav .=
5574                         $cgi->a({-href => href(action=>"blame_incremental", -replay=>1)},
5575                                 "blame") . " (incremental)";
5576         }
5577         $formats_nav .=
5578                 " | " .
5579                 $cgi->a({-href => href(action=>"history", -replay=>1)},
5580                         "history") .
5581                 " | " .
5582                 $cgi->a({-href => href(action=>$action, file_name=>$file_name)},
5583                         "HEAD");
5584         git_print_page_nav('','', $hash_base,$co{'tree'},$hash_base, $formats_nav);
5585         git_print_header_div('commit', esc_html($co{'title'}), $hash_base);
5586         git_print_page_path($file_name, $ftype, $hash_base);
5587
5588         # page body
5589         if ($format eq 'incremental') {
5590                 print "<noscript>\n<div class=\"error\"><center><b>\n".
5591                       "This page requires JavaScript to run.\n Use ".
5592                       $cgi->a({-href => href(action=>'blame',javascript=>0,-replay=>1)},
5593                               'this page').
5594                       " instead.\n".
5595                       "</b></center></div>\n</noscript>\n";
5596
5597                 print qq!<div id="progress_bar" style="width: 100%; background-color: yellow"></div>\n!;
5598         }
5599
5600         print qq!<div class="page_body">\n!;
5601         print qq!<div id="progress_info">... / ...</div>\n!
5602                 if ($format eq 'incremental');
5603         print qq!<table id="blame_table" class="blame" width="100%">\n!.
5604               #qq!<col width="5.5em" /><col width="2.5em" /><col width="*" />\n!.
5605               qq!<thead>\n!.
5606               qq!<tr><th>Commit</th><th>Line</th><th>Data</th></tr>\n!.
5607               qq!</thead>\n!.
5608               qq!<tbody>\n!;
5609
5610         my @rev_color = qw(light dark);
5611         my $num_colors = scalar(@rev_color);
5612         my $current_color = 0;
5613
5614         if ($format eq 'incremental') {
5615                 my $color_class = $rev_color[$current_color];
5616
5617                 #contents of a file
5618                 my $linenr = 0;
5619         LINE:
5620                 while (my $line = <$fd>) {
5621                         chomp $line;
5622                         $linenr++;
5623
5624                         print qq!<tr id="l$linenr" class="$color_class">!.
5625                               qq!<td class="sha1"><a href=""> </a></td>!.
5626                               qq!<td class="linenr">!.
5627                               qq!<a class="linenr" href="">$linenr</a></td>!;
5628                         print qq!<td class="pre">! . esc_html($line) . "</td>\n";
5629                         print qq!</tr>\n!;
5630                 }
5631
5632         } else { # porcelain, i.e. ordinary blame
5633                 my %metainfo = (); # saves information about commits
5634
5635                 # blame data
5636         LINE:
5637                 while (my $line = <$fd>) {
5638                         chomp $line;
5639                         # the header: <SHA-1> <src lineno> <dst lineno> [<lines in group>]
5640                         # no <lines in group> for subsequent lines in group of lines
5641                         my ($full_rev, $orig_lineno, $lineno, $group_size) =
5642                            ($line =~ /^([0-9a-f]{40}) (\d+) (\d+)(?: (\d+))?$/);
5643                         if (!exists $metainfo{$full_rev}) {
5644                                 $metainfo{$full_rev} = { 'nprevious' => 0 };
5645                         }
5646                         my $meta = $metainfo{$full_rev};
5647                         my $data;
5648                         while ($data = <$fd>) {
5649                                 chomp $data;
5650                                 last if ($data =~ s/^\t//); # contents of line
5651                                 if ($data =~ /^(\S+)(?: (.*))?$/) {
5652                                         $meta->{$1} = $2 unless exists $meta->{$1};
5653                                 }
5654                                 if ($data =~ /^previous /) {
5655                                         $meta->{'nprevious'}++;
5656                                 }
5657                         }
5658                         my $short_rev = substr($full_rev, 0, 8);
5659                         my $author = $meta->{'author'};
5660                         my %date =
5661                                 parse_date($meta->{'author-time'}, $meta->{'author-tz'});
5662                         my $date = $date{'iso-tz'};
5663                         if ($group_size) {
5664                                 $current_color = ($current_color + 1) % $num_colors;
5665                         }
5666                         my $tr_class = $rev_color[$current_color];
5667                         $tr_class .= ' boundary' if (exists $meta->{'boundary'});
5668                         $tr_class .= ' no-previous' if ($meta->{'nprevious'} == 0);
5669                         $tr_class .= ' multiple-previous' if ($meta->{'nprevious'} > 1);
5670                         print "<tr id=\"l$lineno\" class=\"$tr_class\">\n";
5671                         if ($group_size) {
5672                                 print "<td class=\"sha1\"";
5673                                 print " title=\"". esc_html($author) . ", $date\"";
5674                                 print " rowspan=\"$group_size\"" if ($group_size > 1);
5675                                 print ">";
5676                                 print $cgi->a({-href => href(action=>"commit",
5677                                                              hash=>$full_rev,
5678                                                              file_name=>$file_name)},
5679                                               esc_html($short_rev));
5680                                 if ($group_size >= 2) {
5681                                         my @author_initials = ($author =~ /\b([[:upper:]])\B/g);
5682                                         if (@author_initials) {
5683                                                 print "<br />" .
5684                                                       esc_html(join('', @author_initials));
5685                                                 #           or join('.', ...)
5686                                         }
5687                                 }
5688                                 print "</td>\n";
5689                         }
5690                         # 'previous' <sha1 of parent commit> <filename at commit>
5691                         if (exists $meta->{'previous'} &&
5692                             $meta->{'previous'} =~ /^([a-fA-F0-9]{40}) (.*)$/) {
5693                                 $meta->{'parent'} = $1;
5694                                 $meta->{'file_parent'} = unquote($2);
5695                         }
5696                         my $linenr_commit =
5697                                 exists($meta->{'parent'}) ?
5698                                 $meta->{'parent'} : $full_rev;
5699                         my $linenr_filename =
5700                                 exists($meta->{'file_parent'}) ?
5701                                 $meta->{'file_parent'} : unquote($meta->{'filename'});
5702                         my $blamed = href(action => 'blame',
5703                                           file_name => $linenr_filename,
5704                                           hash_base => $linenr_commit);
5705                         print "<td class=\"linenr\">";
5706                         print $cgi->a({ -href => "$blamed#l$orig_lineno",
5707                                         -class => "linenr" },
5708                                       esc_html($lineno));
5709                         print "</td>";
5710                         print "<td class=\"pre\">" . esc_html($data) . "</td>\n";
5711                         print "</tr>\n";
5712                 } # end while
5713
5714         }
5715
5716         # footer
5717         print "</tbody>\n".
5718               "</table>\n"; # class="blame"
5719         print "</div>\n";   # class="blame_body"
5720         close $fd
5721                 or print "Reading blob failed\n";
5722
5723         git_footer_html();
5724 }
5725
5726 sub git_blame {
5727         git_blame_common();
5728 }
5729
5730 sub git_blame_incremental {
5731         git_blame_common('incremental');
5732 }
5733
5734 sub git_blame_data {
5735         git_blame_common('data');
5736 }
5737
5738 sub git_tags {
5739         my $head = git_get_head_hash($project);
5740         git_header_html();
5741         git_print_page_nav('','', $head,undef,$head,format_ref_views('tags'));
5742         git_print_header_div('summary', $project);
5743
5744         my @tagslist = git_get_tags_list();
5745         if (@tagslist) {
5746                 git_tags_body(\@tagslist);
5747         }
5748         git_footer_html();
5749 }
5750
5751 sub git_heads {
5752         my $head = git_get_head_hash($project);
5753         git_header_html();
5754         git_print_page_nav('','', $head,undef,$head,format_ref_views('heads'));
5755         git_print_header_div('summary', $project);
5756
5757         my @headslist = git_get_heads_list();
5758         if (@headslist) {
5759                 git_heads_body(\@headslist, $head);
5760         }
5761         git_footer_html();
5762 }
5763
5764 # used both for single remote view and for list of all the remotes
5765 sub git_remotes {
5766         gitweb_check_feature('remote_heads')
5767                 or die_error(403, "Remote heads view is disabled");
5768
5769         my $head = git_get_head_hash($project);
5770         my $remote = $input_params{'hash'};
5771
5772         my $remotedata = git_get_remotes_list($remote);
5773         die_error(500, "Unable to get remote information") unless defined $remotedata;
5774
5775         unless (%$remotedata) {
5776                 die_error(404, defined $remote ?
5777                         "Remote $remote not found" :
5778                         "No remotes found");
5779         }
5780
5781         git_header_html(undef, undef, -action_extra => $remote);
5782         git_print_page_nav('', '',  $head, undef, $head,
5783                 format_ref_views($remote ? '' : 'remotes'));
5784
5785         fill_remote_heads($remotedata);
5786         if (defined $remote) {
5787                 git_print_header_div('remotes', "$remote remote for $project");
5788                 git_remote_block($remote, $remotedata->{$remote}, undef, $head);
5789         } else {
5790                 git_print_header_div('summary', "$project remotes");
5791                 git_remotes_body($remotedata, undef, $head);
5792         }
5793
5794         git_footer_html();
5795 }
5796
5797 sub git_blob_plain {
5798         my $type = shift;
5799         my $expires;
5800
5801         if (!defined $hash) {
5802                 if (defined $file_name) {
5803                         my $base = $hash_base || git_get_head_hash($project);
5804                         $hash = git_get_hash_by_path($base, $file_name, "blob")
5805                                 or die_error(404, "Cannot find file");
5806                 } else {
5807                         die_error(400, "No file name defined");
5808                 }
5809         } elsif ($hash =~ m/^[0-9a-fA-F]{40}$/) {
5810                 # blobs defined by non-textual hash id's can be cached
5811                 $expires = "+1d";
5812         }
5813
5814         open my $fd, "-|", git_cmd(), "cat-file", "blob", $hash
5815                 or die_error(500, "Open git-cat-file blob '$hash' failed");
5816
5817         # content-type (can include charset)
5818         $type = blob_contenttype($fd, $file_name, $type);
5819
5820         # "save as" filename, even when no $file_name is given
5821         my $save_as = "$hash";
5822         if (defined $file_name) {
5823                 $save_as = $file_name;
5824         } elsif ($type =~ m/^text\//) {
5825                 $save_as .= '.txt';
5826         }
5827
5828         # With XSS prevention on, blobs of all types except a few known safe
5829         # ones are served with "Content-Disposition: attachment" to make sure
5830         # they don't run in our security domain.  For certain image types,
5831         # blob view writes an <img> tag referring to blob_plain view, and we
5832         # want to be sure not to break that by serving the image as an
5833         # attachment (though Firefox 3 doesn't seem to care).
5834         my $sandbox = $prevent_xss &&
5835                 $type !~ m!^(?:text/plain|image/(?:gif|png|jpeg))$!;
5836
5837         print $cgi->header(
5838                 -type => $type,
5839                 -expires => $expires,
5840                 -content_disposition =>
5841                         ($sandbox ? 'attachment' : 'inline')
5842                         . '; filename="' . $save_as . '"');
5843         local $/ = undef;
5844         binmode STDOUT, ':raw';
5845         print <$fd>;
5846         binmode STDOUT, ':utf8'; # as set at the beginning of gitweb.cgi
5847         close $fd;
5848 }
5849
5850 sub git_blob {
5851         my $expires;
5852
5853         if (!defined $hash) {
5854                 if (defined $file_name) {
5855                         my $base = $hash_base || git_get_head_hash($project);
5856                         $hash = git_get_hash_by_path($base, $file_name, "blob")
5857                                 or die_error(404, "Cannot find file");
5858                 } else {
5859                         die_error(400, "No file name defined");
5860                 }
5861         } elsif ($hash =~ m/^[0-9a-fA-F]{40}$/) {
5862                 # blobs defined by non-textual hash id's can be cached
5863                 $expires = "+1d";
5864         }
5865
5866         my $have_blame = gitweb_check_feature('blame');
5867         open my $fd, "-|", git_cmd(), "cat-file", "blob", $hash
5868                 or die_error(500, "Couldn't cat $file_name, $hash");
5869         my $mimetype = blob_mimetype($fd, $file_name);
5870         # use 'blob_plain' (aka 'raw') view for files that cannot be displayed
5871         if ($mimetype !~ m!^(?:text/|image/(?:gif|png|jpeg)$)! && -B $fd) {
5872                 close $fd;
5873                 return git_blob_plain($mimetype);
5874         }
5875         # we can have blame only for text/* mimetype
5876         $have_blame &&= ($mimetype =~ m!^text/!);
5877
5878         my $highlight = gitweb_check_feature('highlight');
5879         my $syntax = guess_file_syntax($highlight, $mimetype, $file_name);
5880         $fd = run_highlighter($fd, $highlight, $syntax)
5881                 if $syntax;
5882
5883         git_header_html(undef, $expires);
5884         my $formats_nav = '';
5885         if (defined $hash_base && (my %co = parse_commit($hash_base))) {
5886                 if (defined $file_name) {
5887                         if ($have_blame) {
5888                                 $formats_nav .=
5889                                         $cgi->a({-href => href(action=>"blame", -replay=>1)},
5890                                                 "blame") .
5891                                         " | ";
5892                         }
5893                         $formats_nav .=
5894                                 $cgi->a({-href => href(action=>"history", -replay=>1)},
5895                                         "history") .
5896                                 " | " .
5897                                 $cgi->a({-href => href(action=>"blob_plain", -replay=>1)},
5898                                         "raw") .
5899                                 " | " .
5900                                 $cgi->a({-href => href(action=>"blob",
5901                                                        hash_base=>"HEAD", file_name=>$file_name)},
5902                                         "HEAD");
5903                 } else {
5904                         $formats_nav .=
5905                                 $cgi->a({-href => href(action=>"blob_plain", -replay=>1)},
5906                                         "raw");
5907                 }
5908                 git_print_page_nav('','', $hash_base,$co{'tree'},$hash_base, $formats_nav);
5909                 git_print_header_div('commit', esc_html($co{'title'}), $hash_base);
5910         } else {
5911                 print "<div class=\"page_nav\">\n" .
5912                       "<br/><br/></div>\n" .
5913                       "<div class=\"title\">$hash</div>\n";
5914         }
5915         git_print_page_path($file_name, "blob", $hash_base);
5916         print "<div class=\"page_body\">\n";
5917         if ($mimetype =~ m!^image/!) {
5918                 print qq!<img type="$mimetype"!;
5919                 if ($file_name) {
5920                         print qq! alt="$file_name" title="$file_name"!;
5921                 }
5922                 print qq! src="! .
5923                       href(action=>"blob_plain", hash=>$hash,
5924                            hash_base=>$hash_base, file_name=>$file_name) .
5925                       qq!" />\n!;
5926         } else {
5927                 my $nr;
5928                 while (my $line = <$fd>) {
5929                         chomp $line;
5930                         $nr++;
5931                         $line = untabify($line);
5932                         printf qq!<div class="pre"><a id="l%i" href="%s#l%i" class="linenr">%4i</a> %s</div>\n!,
5933                                $nr, href(-replay => 1), $nr, $nr, $syntax ? $line : esc_html($line, -nbsp=>1);
5934                 }
5935         }
5936         close $fd
5937                 or print "Reading blob failed.\n";
5938         print "</div>";
5939         git_footer_html();
5940 }
5941
5942 sub git_tree {
5943         if (!defined $hash_base) {
5944                 $hash_base = "HEAD";
5945         }
5946         if (!defined $hash) {
5947                 if (defined $file_name) {
5948                         $hash = git_get_hash_by_path($hash_base, $file_name, "tree");
5949                 } else {
5950                         $hash = $hash_base;
5951                 }
5952         }
5953         die_error(404, "No such tree") unless defined($hash);
5954
5955         my $show_sizes = gitweb_check_feature('show-sizes');
5956         my $have_blame = gitweb_check_feature('blame');
5957
5958         my @entries = ();
5959         {
5960                 local $/ = "\0";
5961                 open my $fd, "-|", git_cmd(), "ls-tree", '-z',
5962                         ($show_sizes ? '-l' : ()), @extra_options, $hash
5963                         or die_error(500, "Open git-ls-tree failed");
5964                 @entries = map { chomp; $_ } <$fd>;
5965                 close $fd
5966                         or die_error(404, "Reading tree failed");
5967         }
5968
5969         my $refs = git_get_references();
5970         my $ref = format_ref_marker($refs, $hash_base);
5971         git_header_html();
5972         my $basedir = '';
5973         if (defined $hash_base && (my %co = parse_commit($hash_base))) {
5974                 my @views_nav = ();
5975                 if (defined $file_name) {
5976                         push @views_nav,
5977                                 $cgi->a({-href => href(action=>"history", -replay=>1)},
5978                                         "history"),
5979                                 $cgi->a({-href => href(action=>"tree",
5980                                                        hash_base=>"HEAD", file_name=>$file_name)},
5981                                         "HEAD"),
5982                 }
5983                 my $snapshot_links = format_snapshot_links($hash);
5984                 if (defined $snapshot_links) {
5985                         # FIXME: Should be available when we have no hash base as well.
5986                         push @views_nav, $snapshot_links;
5987                 }
5988                 git_print_page_nav('tree','', $hash_base, undef, undef,
5989                                    join(' | ', @views_nav));
5990                 git_print_header_div('commit', esc_html($co{'title'}) . $ref, $hash_base);
5991         } else {
5992                 undef $hash_base;
5993                 print "<div class=\"page_nav\">\n";
5994                 print "<br/><br/></div>\n";
5995                 print "<div class=\"title\">$hash</div>\n";
5996         }
5997         if (defined $file_name) {
5998                 $basedir = $file_name;
5999                 if ($basedir ne '' && substr($basedir, -1) ne '/') {
6000                         $basedir .= '/';
6001                 }
6002                 git_print_page_path($file_name, 'tree', $hash_base);
6003         }
6004         print "<div class=\"page_body\">\n";
6005         print "<table class=\"tree\">\n";
6006         my $alternate = 1;
6007         # '..' (top directory) link if possible
6008         if (defined $hash_base &&
6009             defined $file_name && $file_name =~ m![^/]+$!) {
6010                 if ($alternate) {
6011                         print "<tr class=\"dark\">\n";
6012                 } else {
6013                         print "<tr class=\"light\">\n";
6014                 }
6015                 $alternate ^= 1;
6016
6017                 my $up = $file_name;
6018                 $up =~ s!/?[^/]+$!!;
6019                 undef $up unless $up;
6020                 # based on git_print_tree_entry
6021                 print '<td class="mode">' . mode_str('040000') . "</td>\n";
6022                 print '<td class="size">&nbsp;</td>'."\n" if $show_sizes;
6023                 print '<td class="list">';
6024                 print $cgi->a({-href => href(action=>"tree",
6025                                              hash_base=>$hash_base,
6026                                              file_name=>$up)},
6027                               "..");
6028                 print "</td>\n";
6029                 print "<td class=\"link\"></td>\n";
6030
6031                 print "</tr>\n";
6032         }
6033         foreach my $line (@entries) {
6034                 my %t = parse_ls_tree_line($line, -z => 1, -l => $show_sizes);
6035
6036                 if ($alternate) {
6037                         print "<tr class=\"dark\">\n";
6038                 } else {
6039                         print "<tr class=\"light\">\n";
6040                 }
6041                 $alternate ^= 1;
6042
6043                 git_print_tree_entry(\%t, $basedir, $hash_base, $have_blame);
6044
6045                 print "</tr>\n";
6046         }
6047         print "</table>\n" .
6048               "</div>";
6049         git_footer_html();
6050 }
6051
6052 sub snapshot_name {
6053         my ($project, $hash) = @_;
6054
6055         # path/to/project.git  -> project
6056         # path/to/project/.git -> project
6057         my $name = to_utf8($project);
6058         $name =~ s,([^/])/*\.git$,$1,;
6059         $name = basename($name);
6060         # sanitize name
6061         $name =~ s/[[:cntrl:]]/?/g;
6062
6063         my $ver = $hash;
6064         if ($hash =~ /^[0-9a-fA-F]+$/) {
6065                 # shorten SHA-1 hash
6066                 my $full_hash = git_get_full_hash($project, $hash);
6067                 if ($full_hash =~ /^$hash/ && length($hash) > 7) {
6068                         $ver = git_get_short_hash($project, $hash);
6069                 }
6070         } elsif ($hash =~ m!^refs/tags/(.*)$!) {
6071                 # tags don't need shortened SHA-1 hash
6072                 $ver = $1;
6073         } else {
6074                 # branches and other need shortened SHA-1 hash
6075                 if ($hash =~ m!^refs/(?:heads|remotes)/(.*)$!) {
6076                         $ver = $1;
6077                 }
6078                 $ver .= '-' . git_get_short_hash($project, $hash);
6079         }
6080         # in case of hierarchical branch names
6081         $ver =~ s!/!.!g;
6082
6083         # name = project-version_string
6084         $name = "$name-$ver";
6085
6086         return wantarray ? ($name, $name) : $name;
6087 }
6088
6089 sub git_snapshot {
6090         my $format = $input_params{'snapshot_format'};
6091         if (!@snapshot_fmts) {
6092                 die_error(403, "Snapshots not allowed");
6093         }
6094         # default to first supported snapshot format
6095         $format ||= $snapshot_fmts[0];
6096         if ($format !~ m/^[a-z0-9]+$/) {
6097                 die_error(400, "Invalid snapshot format parameter");
6098         } elsif (!exists($known_snapshot_formats{$format})) {
6099                 die_error(400, "Unknown snapshot format");
6100         } elsif ($known_snapshot_formats{$format}{'disabled'}) {
6101                 die_error(403, "Snapshot format not allowed");
6102         } elsif (!grep($_ eq $format, @snapshot_fmts)) {
6103                 die_error(403, "Unsupported snapshot format");
6104         }
6105
6106         my $type = git_get_type("$hash^{}");
6107         if (!$type) {
6108                 die_error(404, 'Object does not exist');
6109         }  elsif ($type eq 'blob') {
6110                 die_error(400, 'Object is not a tree-ish');
6111         }
6112
6113         my ($name, $prefix) = snapshot_name($project, $hash);
6114         my $filename = "$name$known_snapshot_formats{$format}{'suffix'}";
6115         my $cmd = quote_command(
6116                 git_cmd(), 'archive',
6117                 "--format=$known_snapshot_formats{$format}{'format'}",
6118                 "--prefix=$prefix/", $hash);
6119         if (exists $known_snapshot_formats{$format}{'compressor'}) {
6120                 $cmd .= ' | ' . quote_command(@{$known_snapshot_formats{$format}{'compressor'}});
6121         }
6122
6123         $filename =~ s/(["\\])/\\$1/g;
6124         print $cgi->header(
6125                 -type => $known_snapshot_formats{$format}{'type'},
6126                 -content_disposition => 'inline; filename="' . $filename . '"',
6127                 -status => '200 OK');
6128
6129         open my $fd, "-|", $cmd
6130                 or die_error(500, "Execute git-archive failed");
6131         binmode STDOUT, ':raw';
6132         print <$fd>;
6133         binmode STDOUT, ':utf8'; # as set at the beginning of gitweb.cgi
6134         close $fd;
6135 }
6136
6137 sub git_log_generic {
6138         my ($fmt_name, $body_subr, $base, $parent, $file_name, $file_hash) = @_;
6139
6140         my $head = git_get_head_hash($project);
6141         if (!defined $base) {
6142                 $base = $head;
6143         }
6144         if (!defined $page) {
6145                 $page = 0;
6146         }
6147         my $refs = git_get_references();
6148
6149         my $commit_hash = $base;
6150         if (defined $parent) {
6151                 $commit_hash = "$parent..$base";
6152         }
6153         my @commitlist =
6154                 parse_commits($commit_hash, 101, (100 * $page),
6155                               defined $file_name ? ($file_name, "--full-history") : ());
6156
6157         my $ftype;
6158         if (!defined $file_hash && defined $file_name) {
6159                 # some commits could have deleted file in question,
6160                 # and not have it in tree, but one of them has to have it
6161                 for (my $i = 0; $i < @commitlist; $i++) {
6162                         $file_hash = git_get_hash_by_path($commitlist[$i]{'id'}, $file_name);
6163                         last if defined $file_hash;
6164                 }
6165         }
6166         if (defined $file_hash) {
6167                 $ftype = git_get_type($file_hash);
6168         }
6169         if (defined $file_name && !defined $ftype) {
6170                 die_error(500, "Unknown type of object");
6171         }
6172         my %co;
6173         if (defined $file_name) {
6174                 %co = parse_commit($base)
6175                         or die_error(404, "Unknown commit object");
6176         }
6177
6178
6179         my $paging_nav = format_paging_nav($fmt_name, $page, $#commitlist >= 100);
6180         my $next_link = '';
6181         if ($#commitlist >= 100) {
6182                 $next_link =
6183                         $cgi->a({-href => href(-replay=>1, page=>$page+1),
6184                                  -accesskey => "n", -title => "Alt-n"}, "next");
6185         }
6186         my $patch_max = gitweb_get_feature('patches');
6187         if ($patch_max && !defined $file_name) {
6188                 if ($patch_max < 0 || @commitlist <= $patch_max) {
6189                         $paging_nav .= " &sdot; " .
6190                                 $cgi->a({-href => href(action=>"patches", -replay=>1)},
6191                                         "patches");
6192                 }
6193         }
6194
6195         git_header_html();
6196         git_print_page_nav($fmt_name,'', $hash,$hash,$hash, $paging_nav);
6197         if (defined $file_name) {
6198                 git_print_header_div('commit', esc_html($co{'title'}), $base);
6199         } else {
6200                 git_print_header_div('summary', $project)
6201         }
6202         git_print_page_path($file_name, $ftype, $hash_base)
6203                 if (defined $file_name);
6204
6205         $body_subr->(\@commitlist, 0, 99, $refs, $next_link,
6206                      $file_name, $file_hash, $ftype);
6207
6208         git_footer_html();
6209 }
6210
6211 sub git_log {
6212         git_log_generic('log', \&git_log_body,
6213                         $hash, $hash_parent);
6214 }
6215
6216 sub git_commit {
6217         $hash ||= $hash_base || "HEAD";
6218         my %co = parse_commit($hash)
6219             or die_error(404, "Unknown commit object");
6220
6221         my $parent  = $co{'parent'};
6222         my $parents = $co{'parents'}; # listref
6223
6224         # we need to prepare $formats_nav before any parameter munging
6225         my $formats_nav;
6226         if (!defined $parent) {
6227                 # --root commitdiff
6228                 $formats_nav .= '(initial)';
6229         } elsif (@$parents == 1) {
6230                 # single parent commit
6231                 $formats_nav .=
6232                         '(parent: ' .
6233                         $cgi->a({-href => href(action=>"commit",
6234                                                hash=>$parent)},
6235                                 esc_html(substr($parent, 0, 7))) .
6236                         ')';
6237         } else {
6238                 # merge commit
6239                 $formats_nav .=
6240                         '(merge: ' .
6241                         join(' ', map {
6242                                 $cgi->a({-href => href(action=>"commit",
6243                                                        hash=>$_)},
6244                                         esc_html(substr($_, 0, 7)));
6245                         } @$parents ) .
6246                         ')';
6247         }
6248         if (gitweb_check_feature('patches') && @$parents <= 1) {
6249                 $formats_nav .= " | " .
6250                         $cgi->a({-href => href(action=>"patch", -replay=>1)},
6251                                 "patch");
6252         }
6253
6254         if (!defined $parent) {
6255                 $parent = "--root";
6256         }
6257         my @difftree;
6258         open my $fd, "-|", git_cmd(), "diff-tree", '-r', "--no-commit-id",
6259                 @diff_opts,
6260                 (@$parents <= 1 ? $parent : '-c'),
6261                 $hash, "--"
6262                 or die_error(500, "Open git-diff-tree failed");
6263         @difftree = map { chomp; $_ } <$fd>;
6264         close $fd or die_error(404, "Reading git-diff-tree failed");
6265
6266         # non-textual hash id's can be cached
6267         my $expires;
6268         if ($hash =~ m/^[0-9a-fA-F]{40}$/) {
6269                 $expires = "+1d";
6270         }
6271         my $refs = git_get_references();
6272         my $ref = format_ref_marker($refs, $co{'id'});
6273
6274         git_header_html(undef, $expires);
6275         git_print_page_nav('commit', '',
6276                            $hash, $co{'tree'}, $hash,
6277                            $formats_nav);
6278
6279         if (defined $co{'parent'}) {
6280                 git_print_header_div('commitdiff', esc_html($co{'title'}) . $ref, $hash);
6281         } else {
6282                 git_print_header_div('tree', esc_html($co{'title'}) . $ref, $co{'tree'}, $hash);
6283         }
6284         print "<div class=\"title_text\">\n" .
6285               "<table class=\"object_header\">\n";
6286         git_print_authorship_rows(\%co);
6287         print "<tr><td>commit</td><td class=\"sha1\">$co{'id'}</td></tr>\n";
6288         print "<tr>" .
6289               "<td>tree</td>" .
6290               "<td class=\"sha1\">" .
6291               $cgi->a({-href => href(action=>"tree", hash=>$co{'tree'}, hash_base=>$hash),
6292                        class => "list"}, $co{'tree'}) .
6293               "</td>" .
6294               "<td class=\"link\">" .
6295               $cgi->a({-href => href(action=>"tree", hash=>$co{'tree'}, hash_base=>$hash)},
6296                       "tree");
6297         my $snapshot_links = format_snapshot_links($hash);
6298         if (defined $snapshot_links) {
6299                 print " | " . $snapshot_links;
6300         }
6301         print "</td>" .
6302               "</tr>\n";
6303
6304         foreach my $par (@$parents) {
6305                 print "<tr>" .
6306                       "<td>parent</td>" .
6307                       "<td class=\"sha1\">" .
6308                       $cgi->a({-href => href(action=>"commit", hash=>$par),
6309                                class => "list"}, $par) .
6310                       "</td>" .
6311                       "<td class=\"link\">" .
6312                       $cgi->a({-href => href(action=>"commit", hash=>$par)}, "commit") .
6313                       " | " .
6314                       $cgi->a({-href => href(action=>"commitdiff", hash=>$hash, hash_parent=>$par)}, "diff") .
6315                       "</td>" .
6316                       "</tr>\n";
6317         }
6318         print "</table>".
6319               "</div>\n";
6320
6321         print "<div class=\"page_body\">\n";
6322         git_print_log($co{'comment'});
6323         print "</div>\n";
6324
6325         git_difftree_body(\@difftree, $hash, @$parents);
6326
6327         git_footer_html();
6328 }
6329
6330 sub git_object {
6331         # object is defined by:
6332         # - hash or hash_base alone
6333         # - hash_base and file_name
6334         my $type;
6335
6336         # - hash or hash_base alone
6337         if ($hash || ($hash_base && !defined $file_name)) {
6338                 my $object_id = $hash || $hash_base;
6339
6340                 open my $fd, "-|", quote_command(
6341                         git_cmd(), 'cat-file', '-t', $object_id) . ' 2> /dev/null'
6342                         or die_error(404, "Object does not exist");
6343                 $type = <$fd>;
6344                 chomp $type;
6345                 close $fd
6346                         or die_error(404, "Object does not exist");
6347
6348         # - hash_base and file_name
6349         } elsif ($hash_base && defined $file_name) {
6350                 $file_name =~ s,/+$,,;
6351
6352                 system(git_cmd(), "cat-file", '-e', $hash_base) == 0
6353                         or die_error(404, "Base object does not exist");
6354
6355                 # here errors should not hapen
6356                 open my $fd, "-|", git_cmd(), "ls-tree", $hash_base, "--", $file_name
6357                         or die_error(500, "Open git-ls-tree failed");
6358                 my $line = <$fd>;
6359                 close $fd;
6360
6361                 #'100644 blob 0fa3f3a66fb6a137f6ec2c19351ed4d807070ffa  panic.c'
6362                 unless ($line && $line =~ m/^([0-9]+) (.+) ([0-9a-fA-F]{40})\t/) {
6363                         die_error(404, "File or directory for given base does not exist");
6364                 }
6365                 $type = $2;
6366                 $hash = $3;
6367         } else {
6368                 die_error(400, "Not enough information to find object");
6369         }
6370
6371         print $cgi->redirect(-uri => href(action=>$type, -full=>1,
6372                                           hash=>$hash, hash_base=>$hash_base,
6373                                           file_name=>$file_name),
6374                              -status => '302 Found');
6375 }
6376
6377 sub git_blobdiff {
6378         my $format = shift || 'html';
6379
6380         my $fd;
6381         my @difftree;
6382         my %diffinfo;
6383         my $expires;
6384
6385         # preparing $fd and %diffinfo for git_patchset_body
6386         # new style URI
6387         if (defined $hash_base && defined $hash_parent_base) {
6388                 if (defined $file_name) {
6389                         # read raw output
6390                         open $fd, "-|", git_cmd(), "diff-tree", '-r', @diff_opts,
6391                                 $hash_parent_base, $hash_base,
6392                                 "--", (defined $file_parent ? $file_parent : ()), $file_name
6393                                 or die_error(500, "Open git-diff-tree failed");
6394                         @difftree = map { chomp; $_ } <$fd>;
6395                         close $fd
6396                                 or die_error(404, "Reading git-diff-tree failed");
6397                         @difftree
6398                                 or die_error(404, "Blob diff not found");
6399
6400                 } elsif (defined $hash &&
6401                          $hash =~ /[0-9a-fA-F]{40}/) {
6402                         # try to find filename from $hash
6403
6404                         # read filtered raw output
6405                         open $fd, "-|", git_cmd(), "diff-tree", '-r', @diff_opts,
6406                                 $hash_parent_base, $hash_base, "--"
6407                                 or die_error(500, "Open git-diff-tree failed");
6408                         @difftree =
6409                                 # ':100644 100644 03b21826... 3b93d5e7... M     ls-files.c'
6410                                 # $hash == to_id
6411                                 grep { /^:[0-7]{6} [0-7]{6} [0-9a-fA-F]{40} $hash/ }
6412                                 map { chomp; $_ } <$fd>;
6413                         close $fd
6414                                 or die_error(404, "Reading git-diff-tree failed");
6415                         @difftree
6416                                 or die_error(404, "Blob diff not found");
6417
6418                 } else {
6419                         die_error(400, "Missing one of the blob diff parameters");
6420                 }
6421
6422                 if (@difftree > 1) {
6423                         die_error(400, "Ambiguous blob diff specification");
6424                 }
6425
6426                 %diffinfo = parse_difftree_raw_line($difftree[0]);
6427                 $file_parent ||= $diffinfo{'from_file'} || $file_name;
6428                 $file_name   ||= $diffinfo{'to_file'};
6429
6430                 $hash_parent ||= $diffinfo{'from_id'};
6431                 $hash        ||= $diffinfo{'to_id'};
6432
6433                 # non-textual hash id's can be cached
6434                 if ($hash_base =~ m/^[0-9a-fA-F]{40}$/ &&
6435                     $hash_parent_base =~ m/^[0-9a-fA-F]{40}$/) {
6436                         $expires = '+1d';
6437                 }
6438
6439                 # open patch output
6440                 open $fd, "-|", git_cmd(), "diff-tree", '-r', @diff_opts,
6441                         '-p', ($format eq 'html' ? "--full-index" : ()),
6442                         $hash_parent_base, $hash_base,
6443                         "--", (defined $file_parent ? $file_parent : ()), $file_name
6444                         or die_error(500, "Open git-diff-tree failed");
6445         }
6446
6447         # old/legacy style URI -- not generated anymore since 1.4.3.
6448         if (!%diffinfo) {
6449                 die_error('404 Not Found', "Missing one of the blob diff parameters")
6450         }
6451
6452         # header
6453         if ($format eq 'html') {
6454                 my $formats_nav =
6455                         $cgi->a({-href => href(action=>"blobdiff_plain", -replay=>1)},
6456                                 "raw");
6457                 git_header_html(undef, $expires);
6458                 if (defined $hash_base && (my %co = parse_commit($hash_base))) {
6459                         git_print_page_nav('','', $hash_base,$co{'tree'},$hash_base, $formats_nav);
6460                         git_print_header_div('commit', esc_html($co{'title'}), $hash_base);
6461                 } else {
6462                         print "<div class=\"page_nav\"><br/>$formats_nav<br/></div>\n";
6463                         print "<div class=\"title\">$hash vs $hash_parent</div>\n";
6464                 }
6465                 if (defined $file_name) {
6466                         git_print_page_path($file_name, "blob", $hash_base);
6467                 } else {
6468                         print "<div class=\"page_path\"></div>\n";
6469                 }
6470
6471         } elsif ($format eq 'plain') {
6472                 print $cgi->header(
6473                         -type => 'text/plain',
6474                         -charset => 'utf-8',
6475                         -expires => $expires,
6476                         -content_disposition => 'inline; filename="' . "$file_name" . '.patch"');
6477
6478                 print "X-Git-Url: " . $cgi->self_url() . "\n\n";
6479
6480         } else {
6481                 die_error(400, "Unknown blobdiff format");
6482         }
6483
6484         # patch
6485         if ($format eq 'html') {
6486                 print "<div class=\"page_body\">\n";
6487
6488                 git_patchset_body($fd, [ \%diffinfo ], $hash_base, $hash_parent_base);
6489                 close $fd;
6490
6491                 print "</div>\n"; # class="page_body"
6492                 git_footer_html();
6493
6494         } else {
6495                 while (my $line = <$fd>) {
6496                         $line =~ s!a/($hash|$hash_parent)!'a/'.esc_path($diffinfo{'from_file'})!eg;
6497                         $line =~ s!b/($hash|$hash_parent)!'b/'.esc_path($diffinfo{'to_file'})!eg;
6498
6499                         print $line;
6500
6501                         last if $line =~ m!^\+\+\+!;
6502                 }
6503                 local $/ = undef;
6504                 print <$fd>;
6505                 close $fd;
6506         }
6507 }
6508
6509 sub git_blobdiff_plain {
6510         git_blobdiff('plain');
6511 }
6512
6513 sub git_commitdiff {
6514         my %params = @_;
6515         my $format = $params{-format} || 'html';
6516
6517         my ($patch_max) = gitweb_get_feature('patches');
6518         if ($format eq 'patch') {
6519                 die_error(403, "Patch view not allowed") unless $patch_max;
6520         }
6521
6522         $hash ||= $hash_base || "HEAD";
6523         my %co = parse_commit($hash)
6524             or die_error(404, "Unknown commit object");
6525
6526         # choose format for commitdiff for merge
6527         if (! defined $hash_parent && @{$co{'parents'}} > 1) {
6528                 $hash_parent = '--cc';
6529         }
6530         # we need to prepare $formats_nav before almost any parameter munging
6531         my $formats_nav;
6532         if ($format eq 'html') {
6533                 $formats_nav =
6534                         $cgi->a({-href => href(action=>"commitdiff_plain", -replay=>1)},
6535                                 "raw");
6536                 if ($patch_max && @{$co{'parents'}} <= 1) {
6537                         $formats_nav .= " | " .
6538                                 $cgi->a({-href => href(action=>"patch", -replay=>1)},
6539                                         "patch");
6540                 }
6541
6542                 if (defined $hash_parent &&
6543                     $hash_parent ne '-c' && $hash_parent ne '--cc') {
6544                         # commitdiff with two commits given
6545                         my $hash_parent_short = $hash_parent;
6546                         if ($hash_parent =~ m/^[0-9a-fA-F]{40}$/) {
6547                                 $hash_parent_short = substr($hash_parent, 0, 7);
6548                         }
6549                         $formats_nav .=
6550                                 ' (from';
6551                         for (my $i = 0; $i < @{$co{'parents'}}; $i++) {
6552                                 if ($co{'parents'}[$i] eq $hash_parent) {
6553                                         $formats_nav .= ' parent ' . ($i+1);
6554                                         last;
6555                                 }
6556                         }
6557                         $formats_nav .= ': ' .
6558                                 $cgi->a({-href => href(action=>"commitdiff",
6559                                                        hash=>$hash_parent)},
6560                                         esc_html($hash_parent_short)) .
6561                                 ')';
6562                 } elsif (!$co{'parent'}) {
6563                         # --root commitdiff
6564                         $formats_nav .= ' (initial)';
6565                 } elsif (scalar @{$co{'parents'}} == 1) {
6566                         # single parent commit
6567                         $formats_nav .=
6568                                 ' (parent: ' .
6569                                 $cgi->a({-href => href(action=>"commitdiff",
6570                                                        hash=>$co{'parent'})},
6571                                         esc_html(substr($co{'parent'}, 0, 7))) .
6572                                 ')';
6573                 } else {
6574                         # merge commit
6575                         if ($hash_parent eq '--cc') {
6576                                 $formats_nav .= ' | ' .
6577                                         $cgi->a({-href => href(action=>"commitdiff",
6578                                                                hash=>$hash, hash_parent=>'-c')},
6579                                                 'combined');
6580                         } else { # $hash_parent eq '-c'
6581                                 $formats_nav .= ' | ' .
6582                                         $cgi->a({-href => href(action=>"commitdiff",
6583                                                                hash=>$hash, hash_parent=>'--cc')},
6584                                                 'compact');
6585                         }
6586                         $formats_nav .=
6587                                 ' (merge: ' .
6588                                 join(' ', map {
6589                                         $cgi->a({-href => href(action=>"commitdiff",
6590                                                                hash=>$_)},
6591                                                 esc_html(substr($_, 0, 7)));
6592                                 } @{$co{'parents'}} ) .
6593                                 ')';
6594                 }
6595         }
6596
6597         my $hash_parent_param = $hash_parent;
6598         if (!defined $hash_parent_param) {
6599                 # --cc for multiple parents, --root for parentless
6600                 $hash_parent_param =
6601                         @{$co{'parents'}} > 1 ? '--cc' : $co{'parent'} || '--root';
6602         }
6603
6604         # read commitdiff
6605         my $fd;
6606         my @difftree;
6607         if ($format eq 'html') {
6608                 open $fd, "-|", git_cmd(), "diff-tree", '-r', @diff_opts,
6609                         "--no-commit-id", "--patch-with-raw", "--full-index",
6610                         $hash_parent_param, $hash, "--"
6611                         or die_error(500, "Open git-diff-tree failed");
6612
6613                 while (my $line = <$fd>) {
6614                         chomp $line;
6615                         # empty line ends raw part of diff-tree output
6616                         last unless $line;
6617                         push @difftree, scalar parse_difftree_raw_line($line);
6618                 }
6619
6620         } elsif ($format eq 'plain') {
6621                 open $fd, "-|", git_cmd(), "diff-tree", '-r', @diff_opts,
6622                         '-p', $hash_parent_param, $hash, "--"
6623                         or die_error(500, "Open git-diff-tree failed");
6624         } elsif ($format eq 'patch') {
6625                 # For commit ranges, we limit the output to the number of
6626                 # patches specified in the 'patches' feature.
6627                 # For single commits, we limit the output to a single patch,
6628                 # diverging from the git-format-patch default.
6629                 my @commit_spec = ();
6630                 if ($hash_parent) {
6631                         if ($patch_max > 0) {
6632                                 push @commit_spec, "-$patch_max";
6633                         }
6634                         push @commit_spec, '-n', "$hash_parent..$hash";
6635                 } else {
6636                         if ($params{-single}) {
6637                                 push @commit_spec, '-1';
6638                         } else {
6639                                 if ($patch_max > 0) {
6640                                         push @commit_spec, "-$patch_max";
6641                                 }
6642                                 push @commit_spec, "-n";
6643                         }
6644                         push @commit_spec, '--root', $hash;
6645                 }
6646                 open $fd, "-|", git_cmd(), "format-patch", @diff_opts,
6647                         '--encoding=utf8', '--stdout', @commit_spec
6648                         or die_error(500, "Open git-format-patch failed");
6649         } else {
6650                 die_error(400, "Unknown commitdiff format");
6651         }
6652
6653         # non-textual hash id's can be cached
6654         my $expires;
6655         if ($hash =~ m/^[0-9a-fA-F]{40}$/) {
6656                 $expires = "+1d";
6657         }
6658
6659         # write commit message
6660         if ($format eq 'html') {
6661                 my $refs = git_get_references();
6662                 my $ref = format_ref_marker($refs, $co{'id'});
6663
6664                 git_header_html(undef, $expires);
6665                 git_print_page_nav('commitdiff','', $hash,$co{'tree'},$hash, $formats_nav);
6666                 git_print_header_div('commit', esc_html($co{'title'}) . $ref, $hash);
6667                 print "<div class=\"title_text\">\n" .
6668                       "<table class=\"object_header\">\n";
6669                 git_print_authorship_rows(\%co);
6670                 print "</table>".
6671                       "</div>\n";
6672                 print "<div class=\"page_body\">\n";
6673                 if (@{$co{'comment'}} > 1) {
6674                         print "<div class=\"log\">\n";
6675                         git_print_log($co{'comment'}, -final_empty_line=> 1, -remove_title => 1);
6676                         print "</div>\n"; # class="log"
6677                 }
6678
6679         } elsif ($format eq 'plain') {
6680                 my $refs = git_get_references("tags");
6681                 my $tagname = git_get_rev_name_tags($hash);
6682                 my $filename = basename($project) . "-$hash.patch";
6683
6684                 print $cgi->header(
6685                         -type => 'text/plain',
6686                         -charset => 'utf-8',
6687                         -expires => $expires,
6688                         -content_disposition => 'inline; filename="' . "$filename" . '"');
6689                 my %ad = parse_date($co{'author_epoch'}, $co{'author_tz'});
6690                 print "From: " . to_utf8($co{'author'}) . "\n";
6691                 print "Date: $ad{'rfc2822'} ($ad{'tz_local'})\n";
6692                 print "Subject: " . to_utf8($co{'title'}) . "\n";
6693
6694                 print "X-Git-Tag: $tagname\n" if $tagname;
6695                 print "X-Git-Url: " . $cgi->self_url() . "\n\n";
6696
6697                 foreach my $line (@{$co{'comment'}}) {
6698                         print to_utf8($line) . "\n";
6699                 }
6700                 print "---\n\n";
6701         } elsif ($format eq 'patch') {
6702                 my $filename = basename($project) . "-$hash.patch";
6703
6704                 print $cgi->header(
6705                         -type => 'text/plain',
6706                         -charset => 'utf-8',
6707                         -expires => $expires,
6708                         -content_disposition => 'inline; filename="' . "$filename" . '"');
6709         }
6710
6711         # write patch
6712         if ($format eq 'html') {
6713                 my $use_parents = !defined $hash_parent ||
6714                         $hash_parent eq '-c' || $hash_parent eq '--cc';
6715                 git_difftree_body(\@difftree, $hash,
6716                                   $use_parents ? @{$co{'parents'}} : $hash_parent);
6717                 print "<br/>\n";
6718
6719                 git_patchset_body($fd, \@difftree, $hash,
6720                                   $use_parents ? @{$co{'parents'}} : $hash_parent);
6721                 close $fd;
6722                 print "</div>\n"; # class="page_body"
6723                 git_footer_html();
6724
6725         } elsif ($format eq 'plain') {
6726                 local $/ = undef;
6727                 print <$fd>;
6728                 close $fd
6729                         or print "Reading git-diff-tree failed\n";
6730         } elsif ($format eq 'patch') {
6731                 local $/ = undef;
6732                 print <$fd>;
6733                 close $fd
6734                         or print "Reading git-format-patch failed\n";
6735         }
6736 }
6737
6738 sub git_commitdiff_plain {
6739         git_commitdiff(-format => 'plain');
6740 }
6741
6742 # format-patch-style patches
6743 sub git_patch {
6744         git_commitdiff(-format => 'patch', -single => 1);
6745 }
6746
6747 sub git_patches {
6748         git_commitdiff(-format => 'patch');
6749 }
6750
6751 sub git_history {
6752         git_log_generic('history', \&git_history_body,
6753                         $hash_base, $hash_parent_base,
6754                         $file_name, $hash);
6755 }
6756
6757 sub git_search {
6758         gitweb_check_feature('search') or die_error(403, "Search is disabled");
6759         if (!defined $searchtext) {
6760                 die_error(400, "Text field is empty");
6761         }
6762         if (!defined $hash) {
6763                 $hash = git_get_head_hash($project);
6764         }
6765         my %co = parse_commit($hash);
6766         if (!%co) {
6767                 die_error(404, "Unknown commit object");
6768         }
6769         if (!defined $page) {
6770                 $page = 0;
6771         }
6772
6773         $searchtype ||= 'commit';
6774         if ($searchtype eq 'pickaxe') {
6775                 # pickaxe may take all resources of your box and run for several minutes
6776                 # with every query - so decide by yourself how public you make this feature
6777                 gitweb_check_feature('pickaxe')
6778                     or die_error(403, "Pickaxe is disabled");
6779         }
6780         if ($searchtype eq 'grep') {
6781                 gitweb_check_feature('grep')[0]
6782                     or die_error(403, "Grep is disabled");
6783         }
6784
6785         git_header_html();
6786
6787         if ($searchtype eq 'commit' or $searchtype eq 'author' or $searchtype eq 'committer') {
6788                 my $greptype;
6789                 if ($searchtype eq 'commit') {
6790                         $greptype = "--grep=";
6791                 } elsif ($searchtype eq 'author') {
6792                         $greptype = "--author=";
6793                 } elsif ($searchtype eq 'committer') {
6794                         $greptype = "--committer=";
6795                 }
6796                 $greptype .= $searchtext;
6797                 my @commitlist = parse_commits($hash, 101, (100 * $page), undef,
6798                                                $greptype, '--regexp-ignore-case',
6799                                                $search_use_regexp ? '--extended-regexp' : '--fixed-strings');
6800
6801                 my $paging_nav = '';
6802                 if ($page > 0) {
6803                         $paging_nav .=
6804                                 $cgi->a({-href => href(action=>"search", hash=>$hash,
6805                                                        searchtext=>$searchtext,
6806                                                        searchtype=>$searchtype)},
6807                                         "first");
6808                         $paging_nav .= " &sdot; " .
6809                                 $cgi->a({-href => href(-replay=>1, page=>$page-1),
6810                                          -accesskey => "p", -title => "Alt-p"}, "prev");
6811                 } else {
6812                         $paging_nav .= "first";
6813                         $paging_nav .= " &sdot; prev";
6814                 }
6815                 my $next_link = '';
6816                 if ($#commitlist >= 100) {
6817                         $next_link =
6818                                 $cgi->a({-href => href(-replay=>1, page=>$page+1),
6819                                          -accesskey => "n", -title => "Alt-n"}, "next");
6820                         $paging_nav .= " &sdot; $next_link";
6821                 } else {
6822                         $paging_nav .= " &sdot; next";
6823                 }
6824
6825                 git_print_page_nav('','', $hash,$co{'tree'},$hash, $paging_nav);
6826                 git_print_header_div('commit', esc_html($co{'title'}), $hash);
6827                 if ($page == 0 && !@commitlist) {
6828                         print "<p>No match.</p>\n";
6829                 } else {
6830                         git_search_grep_body(\@commitlist, 0, 99, $next_link);
6831                 }
6832         }
6833
6834         if ($searchtype eq 'pickaxe') {
6835                 git_print_page_nav('','', $hash,$co{'tree'},$hash);
6836                 git_print_header_div('commit', esc_html($co{'title'}), $hash);
6837
6838                 print "<table class=\"pickaxe search\">\n";
6839                 my $alternate = 1;
6840                 local $/ = "\n";
6841                 open my $fd, '-|', git_cmd(), '--no-pager', 'log', @diff_opts,
6842                         '--pretty=format:%H', '--no-abbrev', '--raw', "-S$searchtext",
6843                         ($search_use_regexp ? '--pickaxe-regex' : ());
6844                 undef %co;
6845                 my @files;
6846                 while (my $line = <$fd>) {
6847                         chomp $line;
6848                         next unless $line;
6849
6850                         my %set = parse_difftree_raw_line($line);
6851                         if (defined $set{'commit'}) {
6852                                 # finish previous commit
6853                                 if (%co) {
6854                                         print "</td>\n" .
6855                                               "<td class=\"link\">" .
6856                                               $cgi->a({-href => href(action=>"commit", hash=>$co{'id'})}, "commit") .
6857                                               " | " .
6858                                               $cgi->a({-href => href(action=>"tree", hash=>$co{'tree'}, hash_base=>$co{'id'})}, "tree");
6859                                         print "</td>\n" .
6860                                               "</tr>\n";
6861                                 }
6862
6863                                 if ($alternate) {
6864                                         print "<tr class=\"dark\">\n";
6865                                 } else {
6866                                         print "<tr class=\"light\">\n";
6867                                 }
6868                                 $alternate ^= 1;
6869                                 %co = parse_commit($set{'commit'});
6870                                 my $author = chop_and_escape_str($co{'author_name'}, 15, 5);
6871                                 print "<td title=\"$co{'age_string_age'}\"><i>$co{'age_string_date'}</i></td>\n" .
6872                                       "<td><i>$author</i></td>\n" .
6873                                       "<td>" .
6874                                       $cgi->a({-href => href(action=>"commit", hash=>$co{'id'}),
6875                                               -class => "list subject"},
6876                                               chop_and_escape_str($co{'title'}, 50) . "<br/>");
6877                         } elsif (defined $set{'to_id'}) {
6878                                 next if ($set{'to_id'} =~ m/^0{40}$/);
6879
6880                                 print $cgi->a({-href => href(action=>"blob", hash_base=>$co{'id'},
6881                                                              hash=>$set{'to_id'}, file_name=>$set{'to_file'}),
6882                                               -class => "list"},
6883                                               "<span class=\"match\">" . esc_path($set{'file'}) . "</span>") .
6884                                       "<br/>\n";
6885                         }
6886                 }
6887                 close $fd;
6888
6889                 # finish last commit (warning: repetition!)
6890                 if (%co) {
6891                         print "</td>\n" .
6892                               "<td class=\"link\">" .
6893                               $cgi->a({-href => href(action=>"commit", hash=>$co{'id'})}, "commit") .
6894                               " | " .
6895                               $cgi->a({-href => href(action=>"tree", hash=>$co{'tree'}, hash_base=>$co{'id'})}, "tree");
6896                         print "</td>\n" .
6897                               "</tr>\n";
6898                 }
6899
6900                 print "</table>\n";
6901         }
6902
6903         if ($searchtype eq 'grep') {
6904                 git_print_page_nav('','', $hash,$co{'tree'},$hash);
6905                 git_print_header_div('commit', esc_html($co{'title'}), $hash);
6906
6907                 print "<table class=\"grep_search\">\n";
6908                 my $alternate = 1;
6909                 my $matches = 0;
6910                 local $/ = "\n";
6911                 open my $fd, "-|", git_cmd(), 'grep', '-n',
6912                         $search_use_regexp ? ('-E', '-i') : '-F',
6913                         $searchtext, $co{'tree'};
6914                 my $lastfile = '';
6915                 while (my $line = <$fd>) {
6916                         chomp $line;
6917                         my ($file, $lno, $ltext, $binary);
6918                         last if ($matches++ > 1000);
6919                         if ($line =~ /^Binary file (.+) matches$/) {
6920                                 $file = $1;
6921                                 $binary = 1;
6922                         } else {
6923                                 (undef, $file, $lno, $ltext) = split(/:/, $line, 4);
6924                         }
6925                         if ($file ne $lastfile) {
6926                                 $lastfile and print "</td></tr>\n";
6927                                 if ($alternate++) {
6928                                         print "<tr class=\"dark\">\n";
6929                                 } else {
6930                                         print "<tr class=\"light\">\n";
6931                                 }
6932                                 print "<td class=\"list\">".
6933                                         $cgi->a({-href => href(action=>"blob", hash=>$co{'hash'},
6934                                                                file_name=>"$file"),
6935                                                 -class => "list"}, esc_path($file));
6936                                 print "</td><td>\n";
6937                                 $lastfile = $file;
6938                         }
6939                         if ($binary) {
6940                                 print "<div class=\"binary\">Binary file</div>\n";
6941                         } else {
6942                                 $ltext = untabify($ltext);
6943                                 if ($ltext =~ m/^(.*)($search_regexp)(.*)$/i) {
6944                                         $ltext = esc_html($1, -nbsp=>1);
6945                                         $ltext .= '<span class="match">';
6946                                         $ltext .= esc_html($2, -nbsp=>1);
6947                                         $ltext .= '</span>';
6948                                         $ltext .= esc_html($3, -nbsp=>1);
6949                                 } else {
6950                                         $ltext = esc_html($ltext, -nbsp=>1);
6951                                 }
6952                                 print "<div class=\"pre\">" .
6953                                         $cgi->a({-href => href(action=>"blob", hash=>$co{'hash'},
6954                                                                file_name=>"$file").'#l'.$lno,
6955                                                 -class => "linenr"}, sprintf('%4i', $lno))
6956                                         . ' ' .  $ltext . "</div>\n";
6957                         }
6958                 }
6959                 if ($lastfile) {
6960                         print "</td></tr>\n";
6961                         if ($matches > 1000) {
6962                                 print "<div class=\"diff nodifferences\">Too many matches, listing trimmed</div>\n";
6963                         }
6964                 } else {
6965                         print "<div class=\"diff nodifferences\">No matches found</div>\n";
6966                 }
6967                 close $fd;
6968
6969                 print "</table>\n";
6970         }
6971         git_footer_html();
6972 }
6973
6974 sub git_search_help {
6975         git_header_html();
6976         git_print_page_nav('','', $hash,$hash,$hash);
6977         print <<EOT;
6978 <p><strong>Pattern</strong> is by default a normal string that is matched precisely (but without
6979 regard to case, except in the case of pickaxe). However, when you check the <em>re</em> checkbox,
6980 the pattern entered is recognized as the POSIX extended
6981 <a href="http://en.wikipedia.org/wiki/Regular_expression">regular expression</a> (also case
6982 insensitive).</p>
6983 <dl>
6984 <dt><b>commit</b></dt>
6985 <dd>The commit messages and authorship information will be scanned for the given pattern.</dd>
6986 EOT
6987         my $have_grep = gitweb_check_feature('grep');
6988         if ($have_grep) {
6989                 print <<EOT;
6990 <dt><b>grep</b></dt>
6991 <dd>All files in the currently selected tree (HEAD unless you are explicitly browsing
6992     a different one) are searched for the given pattern. On large trees, this search can take
6993 a while and put some strain on the server, so please use it with some consideration. Note that
6994 due to git-grep peculiarity, currently if regexp mode is turned off, the matches are
6995 case-sensitive.</dd>
6996 EOT
6997         }
6998         print <<EOT;
6999 <dt><b>author</b></dt>
7000 <dd>Name and e-mail of the change author and date of birth of the patch will be scanned for the given pattern.</dd>
7001 <dt><b>committer</b></dt>
7002 <dd>Name and e-mail of the committer and date of commit will be scanned for the given pattern.</dd>
7003 EOT
7004         my $have_pickaxe = gitweb_check_feature('pickaxe');
7005         if ($have_pickaxe) {
7006                 print <<EOT;
7007 <dt><b>pickaxe</b></dt>
7008 <dd>All commits that caused the string to appear or disappear from any file (changes that
7009 added, removed or "modified" the string) will be listed. This search can take a while and
7010 takes a lot of strain on the server, so please use it wisely. Note that since you may be
7011 interested even in changes just changing the case as well, this search is case sensitive.</dd>
7012 EOT
7013         }
7014         print "</dl>\n";
7015         git_footer_html();
7016 }
7017
7018 sub git_shortlog {
7019         git_log_generic('shortlog', \&git_shortlog_body,
7020                         $hash, $hash_parent);
7021 }
7022
7023 ## ......................................................................
7024 ## feeds (RSS, Atom; OPML)
7025
7026 sub git_feed {
7027         my $format = shift || 'atom';
7028         my $have_blame = gitweb_check_feature('blame');
7029
7030         # Atom: http://www.atomenabled.org/developers/syndication/
7031         # RSS:  http://www.notestips.com/80256B3A007F2692/1/NAMO5P9UPQ
7032         if ($format ne 'rss' && $format ne 'atom') {
7033                 die_error(400, "Unknown web feed format");
7034         }
7035
7036         # log/feed of current (HEAD) branch, log of given branch, history of file/directory
7037         my $head = $hash || 'HEAD';
7038         my @commitlist = parse_commits($head, 150, 0, $file_name);
7039
7040         my %latest_commit;
7041         my %latest_date;
7042         my $content_type = "application/$format+xml";
7043         if (defined $cgi->http('HTTP_ACCEPT') &&
7044                  $cgi->Accept('text/xml') > $cgi->Accept($content_type)) {
7045                 # browser (feed reader) prefers text/xml
7046                 $content_type = 'text/xml';
7047         }
7048         if (defined($commitlist[0])) {
7049                 %latest_commit = %{$commitlist[0]};
7050                 my $latest_epoch = $latest_commit{'committer_epoch'};
7051                 %latest_date   = parse_date($latest_epoch);
7052                 my $if_modified = $cgi->http('IF_MODIFIED_SINCE');
7053                 if (defined $if_modified) {
7054                         my $since;
7055                         if (eval { require HTTP::Date; 1; }) {
7056                                 $since = HTTP::Date::str2time($if_modified);
7057                         } elsif (eval { require Time::ParseDate; 1; }) {
7058                                 $since = Time::ParseDate::parsedate($if_modified, GMT => 1);
7059                         }
7060                         if (defined $since && $latest_epoch <= $since) {
7061                                 print $cgi->header(
7062                                         -type => $content_type,
7063                                         -charset => 'utf-8',
7064                                         -last_modified => $latest_date{'rfc2822'},
7065                                         -status => '304 Not Modified');
7066                                 return;
7067                         }
7068                 }
7069                 print $cgi->header(
7070                         -type => $content_type,
7071                         -charset => 'utf-8',
7072                         -last_modified => $latest_date{'rfc2822'});
7073         } else {
7074                 print $cgi->header(
7075                         -type => $content_type,
7076                         -charset => 'utf-8');
7077         }
7078
7079         # Optimization: skip generating the body if client asks only
7080         # for Last-Modified date.
7081         return if ($cgi->request_method() eq 'HEAD');
7082
7083         # header variables
7084         my $title = "$site_name - $project/$action";
7085         my $feed_type = 'log';
7086         if (defined $hash) {
7087                 $title .= " - '$hash'";
7088                 $feed_type = 'branch log';
7089                 if (defined $file_name) {
7090                         $title .= " :: $file_name";
7091                         $feed_type = 'history';
7092                 }
7093         } elsif (defined $file_name) {
7094                 $title .= " - $file_name";
7095                 $feed_type = 'history';
7096         }
7097         $title .= " $feed_type";
7098         my $descr = git_get_project_description($project);
7099         if (defined $descr) {
7100                 $descr = esc_html($descr);
7101         } else {
7102                 $descr = "$project " .
7103                          ($format eq 'rss' ? 'RSS' : 'Atom') .
7104                          " feed";
7105         }
7106         my $owner = git_get_project_owner($project);
7107         $owner = esc_html($owner);
7108
7109         #header
7110         my $alt_url;
7111         if (defined $file_name) {
7112                 $alt_url = href(-full=>1, action=>"history", hash=>$hash, file_name=>$file_name);
7113         } elsif (defined $hash) {
7114                 $alt_url = href(-full=>1, action=>"log", hash=>$hash);
7115         } else {
7116                 $alt_url = href(-full=>1, action=>"summary");
7117         }
7118         print qq!<?xml version="1.0" encoding="utf-8"?>\n!;
7119         if ($format eq 'rss') {
7120                 print <<XML;
7121 <rss version="2.0" xmlns:content="http://purl.org/rss/1.0/modules/content/">
7122 <channel>
7123 XML
7124                 print "<title>$title</title>\n" .
7125                       "<link>$alt_url</link>\n" .
7126                       "<description>$descr</description>\n" .
7127                       "<language>en</language>\n" .
7128                       # project owner is responsible for 'editorial' content
7129                       "<managingEditor>$owner</managingEditor>\n";
7130                 if (defined $logo || defined $favicon) {
7131                         # prefer the logo to the favicon, since RSS
7132                         # doesn't allow both
7133                         my $img = esc_url($logo || $favicon);
7134                         print "<image>\n" .
7135                               "<url>$img</url>\n" .
7136                               "<title>$title</title>\n" .
7137                               "<link>$alt_url</link>\n" .
7138                               "</image>\n";
7139                 }
7140                 if (%latest_date) {
7141                         print "<pubDate>$latest_date{'rfc2822'}</pubDate>\n";
7142                         print "<lastBuildDate>$latest_date{'rfc2822'}</lastBuildDate>\n";
7143                 }
7144                 print "<generator>gitweb v.$version/$git_version</generator>\n";
7145         } elsif ($format eq 'atom') {
7146                 print <<XML;
7147 <feed xmlns="http://www.w3.org/2005/Atom">
7148 XML
7149                 print "<title>$title</title>\n" .
7150                       "<subtitle>$descr</subtitle>\n" .
7151                       '<link rel="alternate" type="text/html" href="' .
7152                       $alt_url . '" />' . "\n" .
7153                       '<link rel="self" type="' . $content_type . '" href="' .
7154                       $cgi->self_url() . '" />' . "\n" .
7155                       "<id>" . href(-full=>1) . "</id>\n" .
7156                       # use project owner for feed author
7157                       "<author><name>$owner</name></author>\n";
7158                 if (defined $favicon) {
7159                         print "<icon>" . esc_url($favicon) . "</icon>\n";
7160                 }
7161                 if (defined $logo_url) {
7162                         # not twice as wide as tall: 72 x 27 pixels
7163                         print "<logo>" . esc_url($logo) . "</logo>\n";
7164                 }
7165                 if (! %latest_date) {
7166                         # dummy date to keep the feed valid until commits trickle in:
7167                         print "<updated>1970-01-01T00:00:00Z</updated>\n";
7168                 } else {
7169                         print "<updated>$latest_date{'iso-8601'}</updated>\n";
7170                 }
7171                 print "<generator version='$version/$git_version'>gitweb</generator>\n";
7172         }
7173
7174         # contents
7175         for (my $i = 0; $i <= $#commitlist; $i++) {
7176                 my %co = %{$commitlist[$i]};
7177                 my $commit = $co{'id'};
7178                 # we read 150, we always show 30 and the ones more recent than 48 hours
7179                 if (($i >= 20) && ((time - $co{'author_epoch'}) > 48*60*60)) {
7180                         last;
7181                 }
7182                 my %cd = parse_date($co{'author_epoch'});
7183
7184                 # get list of changed files
7185                 open my $fd, "-|", git_cmd(), "diff-tree", '-r', @diff_opts,
7186                         $co{'parent'} || "--root",
7187                         $co{'id'}, "--", (defined $file_name ? $file_name : ())
7188                         or next;
7189                 my @difftree = map { chomp; $_ } <$fd>;
7190                 close $fd
7191                         or next;
7192
7193                 # print element (entry, item)
7194                 my $co_url = href(-full=>1, action=>"commitdiff", hash=>$commit);
7195                 if ($format eq 'rss') {
7196                         print "<item>\n" .
7197                               "<title>" . esc_html($co{'title'}) . "</title>\n" .
7198                               "<author>" . esc_html($co{'author'}) . "</author>\n" .
7199                               "<pubDate>$cd{'rfc2822'}</pubDate>\n" .
7200                               "<guid isPermaLink=\"true\">$co_url</guid>\n" .
7201                               "<link>$co_url</link>\n" .
7202                               "<description>" . esc_html($co{'title'}) . "</description>\n" .
7203                               "<content:encoded>" .
7204                               "<![CDATA[\n";
7205                 } elsif ($format eq 'atom') {
7206                         print "<entry>\n" .
7207                               "<title type=\"html\">" . esc_html($co{'title'}) . "</title>\n" .
7208                               "<updated>$cd{'iso-8601'}</updated>\n" .
7209                               "<author>\n" .
7210                               "  <name>" . esc_html($co{'author_name'}) . "</name>\n";
7211                         if ($co{'author_email'}) {
7212                                 print "  <email>" . esc_html($co{'author_email'}) . "</email>\n";
7213                         }
7214                         print "</author>\n" .
7215                               # use committer for contributor
7216                               "<contributor>\n" .
7217                               "  <name>" . esc_html($co{'committer_name'}) . "</name>\n";
7218                         if ($co{'committer_email'}) {
7219                                 print "  <email>" . esc_html($co{'committer_email'}) . "</email>\n";
7220                         }
7221                         print "</contributor>\n" .
7222                               "<published>$cd{'iso-8601'}</published>\n" .
7223                               "<link rel=\"alternate\" type=\"text/html\" href=\"$co_url\" />\n" .
7224                               "<id>$co_url</id>\n" .
7225                               "<content type=\"xhtml\" xml:base=\"" . esc_url($my_url) . "\">\n" .
7226                               "<div xmlns=\"http://www.w3.org/1999/xhtml\">\n";
7227                 }
7228                 my $comment = $co{'comment'};
7229                 print "<pre>\n";
7230                 foreach my $line (@$comment) {
7231                         $line = esc_html($line);
7232                         print "$line\n";
7233                 }
7234                 print "</pre><ul>\n";
7235                 foreach my $difftree_line (@difftree) {
7236                         my %difftree = parse_difftree_raw_line($difftree_line);
7237                         next if !$difftree{'from_id'};
7238
7239                         my $file = $difftree{'file'} || $difftree{'to_file'};
7240
7241                         print "<li>" .
7242                               "[" .
7243                               $cgi->a({-href => href(-full=>1, action=>"blobdiff",
7244                                                      hash=>$difftree{'to_id'}, hash_parent=>$difftree{'from_id'},
7245                                                      hash_base=>$co{'id'}, hash_parent_base=>$co{'parent'},
7246                                                      file_name=>$file, file_parent=>$difftree{'from_file'}),
7247                                       -title => "diff"}, 'D');
7248                         if ($have_blame) {
7249                                 print $cgi->a({-href => href(-full=>1, action=>"blame",
7250                                                              file_name=>$file, hash_base=>$commit),
7251                                               -title => "blame"}, 'B');
7252                         }
7253                         # if this is not a feed of a file history
7254                         if (!defined $file_name || $file_name ne $file) {
7255                                 print $cgi->a({-href => href(-full=>1, action=>"history",
7256                                                              file_name=>$file, hash=>$commit),
7257                                               -title => "history"}, 'H');
7258                         }
7259                         $file = esc_path($file);
7260                         print "] ".
7261                               "$file</li>\n";
7262                 }
7263                 if ($format eq 'rss') {
7264                         print "</ul>]]>\n" .
7265                               "</content:encoded>\n" .
7266                               "</item>\n";
7267                 } elsif ($format eq 'atom') {
7268                         print "</ul>\n</div>\n" .
7269                               "</content>\n" .
7270                               "</entry>\n";
7271                 }
7272         }
7273
7274         # end of feed
7275         if ($format eq 'rss') {
7276                 print "</channel>\n</rss>\n";
7277         } elsif ($format eq 'atom') {
7278                 print "</feed>\n";
7279         }
7280 }
7281
7282 sub git_rss {
7283         git_feed('rss');
7284 }
7285
7286 sub git_atom {
7287         git_feed('atom');
7288 }
7289
7290 sub git_opml {
7291         my @list = git_get_projects_list();
7292
7293         print $cgi->header(
7294                 -type => 'text/xml',
7295                 -charset => 'utf-8',
7296                 -content_disposition => 'inline; filename="opml.xml"');
7297
7298         print <<XML;
7299 <?xml version="1.0" encoding="utf-8"?>
7300 <opml version="1.0">
7301 <head>
7302   <title>$site_name OPML Export</title>
7303 </head>
7304 <body>
7305 <outline text="git RSS feeds">
7306 XML
7307
7308         foreach my $pr (@list) {
7309                 my %proj = %$pr;
7310                 my $head = git_get_head_hash($proj{'path'});
7311                 if (!defined $head) {
7312                         next;
7313                 }
7314                 $git_dir = "$projectroot/$proj{'path'}";
7315                 my %co = parse_commit($head);
7316                 if (!%co) {
7317                         next;
7318                 }
7319
7320                 my $path = esc_html(chop_str($proj{'path'}, 25, 5));
7321                 my $rss  = href('project' => $proj{'path'}, 'action' => 'rss', -full => 1);
7322                 my $html = href('project' => $proj{'path'}, 'action' => 'summary', -full => 1);
7323                 print "<outline type=\"rss\" text=\"$path\" title=\"$path\" xmlUrl=\"$rss\" htmlUrl=\"$html\"/>\n";
7324         }
7325         print <<XML;
7326 </outline>
7327 </body>
7328 </opml>
7329 XML
7330 }