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 sql make),
 255         # alternate extensions, see /etc/highlight/filetypes.conf
 256         'h' => 'c',
 257         map { $_ => 'sh'  } qw(bash zsh ksh),
 258         map { $_ => 'cpp' } qw(cxx c++ cc),
 259         map { $_ => 'php' } qw(php3 php4 php5 phps),
 260         map { $_ => 'pl'  } qw(perl pm), # perhaps also 'cgi'
 261         map { $_ => 'make'} qw(mak mk),
 262         map { $_ => 'xml' } qw(xhtml html htm),
 263 );
 264
 265 # You define site-wide feature defaults here; override them with
 266 # $GITWEB_CONFIG as necessary.
 267 our %feature = (
 268         # feature => {
 269         #       'sub' => feature-sub (subroutine),
 270         #       'override' => allow-override (boolean),
 271         #       'default' => [ default options...] (array reference)}
 272         #
 273         # if feature is overridable (it means that allow-override has true value),
 274         # then feature-sub will be called with default options as parameters;
 275         # return value of feature-sub indicates if to enable specified feature
 276         #
 277         # if there is no 'sub' key (no feature-sub), then feature cannot be
 278         # overridden
 279         #
 280         # use gitweb_get_feature(<feature>) to retrieve the <feature> value
 281         # (an array) or gitweb_check_feature(<feature>) to check if <feature>
 282         # is enabled
 283
 284         # Enable the 'blame' blob view, showing the last commit that modified
 285         # each line in the file. This can be very CPU-intensive.
 286
 287         # To enable system wide have in $GITWEB_CONFIG
 288         # $feature{'blame'}{'default'} = [1];
 289         # To have project specific config enable override in $GITWEB_CONFIG
 290         # $feature{'blame'}{'override'} = 1;
 291         # and in project config gitweb.blame = 0|1;
 292         'blame' => {
 293                 'sub' => sub { feature_bool('blame', @_) },
 294                 'override' => 0,
 295                 'default' => [0]},
 296
 297         # Enable the 'snapshot' link, providing a compressed archive of any
 298         # tree. This can potentially generate high traffic if you have large
 299         # project.
 300
 301         # Value is a list of formats defined in %known_snapshot_formats that
 302         # you wish to offer.
 303         # To disable system wide have in $GITWEB_CONFIG
 304         # $feature{'snapshot'}{'default'} = [];
 305         # To have project specific config enable override in $GITWEB_CONFIG
 306         # $feature{'snapshot'}{'override'} = 1;
 307         # and in project config, a comma-separated list of formats or "none"
 308         # to disable.  Example: gitweb.snapshot = tbz2,zip;
 309         'snapshot' => {
 310                 'sub' => \&feature_snapshot,
 311                 'override' => 0,
 312                 'default' => ['tgz']},
 313
 314         # Enable text search, which will list the commits which match author,
 315         # committer or commit text to a given string.  Enabled by default.
 316         # Project specific override is not supported.
 317         'search' => {
 318                 'override' => 0,
 319                 'default' => [1]},
 320
 321         # Enable grep search, which will list the files in currently selected
 322         # tree containing the given string. Enabled by default. This can be
 323         # potentially CPU-intensive, of course.
 324
 325         # To enable system wide have in $GITWEB_CONFIG
 326         # $feature{'grep'}{'default'} = [1];
 327         # To have project specific config enable override in $GITWEB_CONFIG
 328         # $feature{'grep'}{'override'} = 1;
 329         # and in project config gitweb.grep = 0|1;
 330         'grep' => {
 331                 'sub' => sub { feature_bool('grep', @_) },
 332                 'override' => 0,
 333                 'default' => [1]},
 334
 335         # Enable the pickaxe search, which will list the commits that modified
 336         # a given string in a file. This can be practical and quite faster
 337         # alternative to 'blame', but still potentially CPU-intensive.
 338
 339         # To enable system wide have in $GITWEB_CONFIG
 340         # $feature{'pickaxe'}{'default'} = [1];
 341         # To have project specific config enable override in $GITWEB_CONFIG
 342         # $feature{'pickaxe'}{'override'} = 1;
 343         # and in project config gitweb.pickaxe = 0|1;
 344         'pickaxe' => {
 345                 'sub' => sub { feature_bool('pickaxe', @_) },
 346                 'override' => 0,
 347                 'default' => [1]},
 348
 349         # Enable showing size of blobs in a 'tree' view, in a separate
 350         # column, similar to what 'ls -l' does.  This cost a bit of IO.
 351
 352         # To disable system wide have in $GITWEB_CONFIG
 353         # $feature{'show-sizes'}{'default'} = [0];
 354         # To have project specific config enable override in $GITWEB_CONFIG
 355         # $feature{'show-sizes'}{'override'} = 1;
 356         # and in project config gitweb.showsizes = 0|1;
 357         'show-sizes' => {
 358                 'sub' => sub { feature_bool('showsizes', @_) },
 359                 'override' => 0,
 360                 'default' => [1]},
 361
 362         # Make gitweb use an alternative format of the URLs which can be
 363         # more readable and natural-looking: project name is embedded
 364         # directly in the path and the query string contains other
 365         # auxiliary information. All gitweb installations recognize
 366         # URL in either format; this configures in which formats gitweb
 367         # generates links.
 368
 369         # To enable system wide have in $GITWEB_CONFIG
 370         # $feature{'pathinfo'}{'default'} = [1];
 371         # Project specific override is not supported.
 372
 373         # Note that you will need to change the default location of CSS,
 374         # favicon, logo and possibly other files to an absolute URL. Also,
 375         # if gitweb.cgi serves as your indexfile, you will need to force
 376         # $my_uri to contain the script name in your $GITWEB_CONFIG.
 377         'pathinfo' => {
 378                 'override' => 0,
 379                 'default' => [0]},
 380
 381         # Make gitweb consider projects in project root subdirectories
 382         # to be forks of existing projects. Given project $projname.git,
 383         # projects matching $projname/*.git will not be shown in the main
 384         # projects list, instead a '+' mark will be added to $projname
 385         # there and a 'forks' view will be enabled for the project, listing
 386         # all the forks. If project list is taken from a file, forks have
 387         # to be listed after the main project.
 388
 389         # To enable system wide have in $GITWEB_CONFIG
 390         # $feature{'forks'}{'default'} = [1];
 391         # Project specific override is not supported.
 392         'forks' => {
 393                 'override' => 0,
 394                 'default' => [0]},
 395
 396         # Insert custom links to the action bar of all project pages.
 397         # This enables you mainly to link to third-party scripts integrating
 398         # into gitweb; e.g. git-browser for graphical history representation
 399         # or custom web-based repository administration interface.
 400
 401         # The 'default' value consists of a list of triplets in the form
 402         # (label, link, position) where position is the label after which
 403         # to insert the link and link is a format string where %n expands
 404         # to the project name, %f to the project path within the filesystem,
 405         # %h to the current hash (h gitweb parameter) and %b to the current
 406         # hash base (hb gitweb parameter); %% expands to %.
 407
 408         # To enable system wide have in $GITWEB_CONFIG e.g.
 409         # $feature{'actions'}{'default'} = [('graphiclog',
 410         #       '/git-browser/by-commit.html?r=%n', 'summary')];
 411         # Project specific override is not supported.
 412         'actions' => {
 413                 'override' => 0,
 414                 'default' => []},
 415
 416         # Allow gitweb scan project content tags described in ctags/
 417         # of project repository, and display the popular Web 2.0-ish
 418         # "tag cloud" near the project list. Note that this is something
 419         # COMPLETELY different from the normal Git tags.
 420
 421         # gitweb by itself can show existing tags, but it does not handle
 422         # tagging itself; you need an external application for that.
 423         # For an example script, check Girocco's cgi/tagproj.cgi.
 424         # You may want to install the HTML::TagCloud Perl module to get
 425         # a pretty tag cloud instead of just a list of tags.
 426
 427         # To enable system wide have in $GITWEB_CONFIG
 428         # $feature{'ctags'}{'default'} = ['path_to_tag_script'];
 429         # Project specific override is not supported.
 430         'ctags' => {
 431                 'override' => 0,
 432                 'default' => [0]},
 433
 434         # The maximum number of patches in a patchset generated in patch
 435         # view. Set this to 0 or undef to disable patch view, or to a
 436         # negative number to remove any limit.
 437
 438         # To disable system wide have in $GITWEB_CONFIG
 439         # $feature{'patches'}{'default'} = [0];
 440         # To have project specific config enable override in $GITWEB_CONFIG
 441         # $feature{'patches'}{'override'} = 1;
 442         # and in project config gitweb.patches = 0|n;
 443         # where n is the maximum number of patches allowed in a patchset.
 444         'patches' => {
 445                 'sub' => \&feature_patches,
 446                 'override' => 0,
 447                 'default' => [16]},
 448
 449         # Avatar support. When this feature is enabled, views such as
 450         # shortlog or commit will display an avatar associated with
 451         # the email of the committer(s) and/or author(s).
 452
 453         # Currently available providers are gravatar and picon.
 454         # If an unknown provider is specified, the feature is disabled.
 455
 456         # Gravatar depends on Digest::MD5.
 457         # Picon currently relies on the indiana.edu database.
 458
 459         # To enable system wide have in $GITWEB_CONFIG
 460         # $feature{'avatar'}{'default'} = ['<provider>'];
 461         # where <provider> is either gravatar or picon.
 462         # To have project specific config enable override in $GITWEB_CONFIG
 463         # $feature{'avatar'}{'override'} = 1;
 464         # and in project config gitweb.avatar = <provider>;
 465         'avatar' => {
 466                 'sub' => \&feature_avatar,
 467                 'override' => 0,
 468                 'default' => ['']},
 469
 470         # Enable displaying how much time and how many git commands
 471         # it took to generate and display page.  Disabled by default.
 472         # Project specific override is not supported.
 473         'timed' => {
 474                 'override' => 0,
 475                 'default' => [0]},
 476
 477         # Enable turning some links into links to actions which require
 478         # JavaScript to run (like 'blame_incremental').  Not enabled by
 479         # default.  Project specific override is currently not supported.
 480         'javascript-actions' => {
 481                 'override' => 0,
 482                 'default' => [0]},
 483
 484         # Syntax highlighting support. This is based on Daniel Svensson's
 485         # and Sham Chukoury's work in gitweb-xmms2.git.
 486         # It requires the 'highlight' program present in $PATH,
 487         # and therefore is disabled by default.
 488
 489         # To enable system wide have in $GITWEB_CONFIG
 490         # $feature{'highlight'}{'default'} = [1];
 491
 492         'highlight' => {
 493                 'sub' => sub { feature_bool('highlight', @_) },
 494                 'override' => 0,
 495                 'default' => [0]},
 496
 497         # Enable displaying of remote heads in the heads list
 498
 499         # To enable system wide have in $GITWEB_CONFIG
 500         # $feature{'remote_heads'}{'default'} = [1];
 501         # To have project specific config enable override in $GITWEB_CONFIG
 502         # $feature{'remote_heads'}{'override'} = 1;
 503         # and in project config gitweb.remote_heads = 0|1;
 504         'remote_heads' => {
 505                 'sub' => sub { feature_bool('remote_heads', @_) },
 506                 'override' => 0,
 507                 'default' => [0]},
 508 );
 509
 510 sub gitweb_get_feature {
 511         my ($name) = @_;
 512         return unless exists $feature{$name};
 513         my ($sub, $override, @defaults) = (
 514                 $feature{$name}{'sub'},
 515                 $feature{$name}{'override'},
 516                 @{$feature{$name}{'default'}});
 517         # project specific override is possible only if we have project
 518         our $git_dir; # global variable, declared later
 519         if (!$override || !defined $git_dir) {
 520                 return @defaults;
 521         }
 522         if (!defined $sub) {
 523                 warn "feature $name is not overridable";
 524                 return @defaults;
 525         }
 526         return $sub->(@defaults);
 527 }
 528
 529 # A wrapper to check if a given feature is enabled.
 530 # With this, you can say
 531 #
 532 #   my $bool_feat = gitweb_check_feature('bool_feat');
 533 #   gitweb_check_feature('bool_feat') or somecode;
 534 #
 535 # instead of
 536 #
 537 #   my ($bool_feat) = gitweb_get_feature('bool_feat');
 538 #   (gitweb_get_feature('bool_feat'))[0] or somecode;
 539 #
 540 sub gitweb_check_feature {
 541         return (gitweb_get_feature(@_))[0];
 542 }
 543
 544
 545 sub feature_bool {
 546         my $key = shift;
 547         my ($val) = git_get_project_config($key, '--bool');
 548
 549         if (!defined $val) {
 550                 return ($_[0]);
 551         } elsif ($val eq 'true') {
 552                 return (1);
 553         } elsif ($val eq 'false') {
 554                 return (0);
 555         }
 556 }
 557
 558 sub feature_snapshot {
 559         my (@fmts) = @_;
 560
 561         my ($val) = git_get_project_config('snapshot');
 562
 563         if ($val) {
 564                 @fmts = ($val eq 'none' ? () : split /\s*[,\s]\s*/, $val);
 565         }
 566
 567         return @fmts;
 568 }
 569
 570 sub feature_patches {
 571         my @val = (git_get_project_config('patches', '--int'));
 572
 573         if (@val) {
 574                 return @val;
 575         }
 576
 577         return ($_[0]);
 578 }
 579
 580 sub feature_avatar {
 581         my @val = (git_get_project_config('avatar'));
 582
 583         return @val ? @val : @_;
 584 }
 585
 586 # checking HEAD file with -e is fragile if the repository was
 587 # initialized long time ago (i.e. symlink HEAD) and was pack-ref'ed
 588 # and then pruned.
 589 sub check_head_link {
 590         my ($dir) = @_;
 591         my $headfile = "$dir/HEAD";
 592         return ((-e $headfile) ||
 593                 (-l $headfile && readlink($headfile) =~ /^refs\/heads\//));
 594 }
 595
 596 sub check_export_ok {
 597         my ($dir) = @_;
 598         return (check_head_link($dir) &&
 599                 (!$export_ok || -e "$dir/$export_ok") &&
 600                 (!$export_auth_hook || $export_auth_hook->($dir)));
 601 }
 602
 603 # process alternate names for backward compatibility
 604 # filter out unsupported (unknown) snapshot formats
 605 sub filter_snapshot_fmts {
 606         my @fmts = @_;
 607
 608         @fmts = map {
 609                 exists $known_snapshot_format_aliases{$_} ?
 610                        $known_snapshot_format_aliases{$_} : $_} @fmts;
 611         @fmts = grep {
 612                 exists $known_snapshot_formats{$_} &&
 613                 !$known_snapshot_formats{$_}{'disabled'}} @fmts;
 614 }
 615
 616 # If it is set to code reference, it is code that it is to be run once per
 617 # request, allowing updating configurations that change with each request,
 618 # while running other code in config file only once.
 619 #
 620 # Otherwise, if it is false then gitweb would process config file only once;
 621 # if it is true then gitweb config would be run for each request.
 622 our $per_request_config = 1;
 623
 624 our ($GITWEB_CONFIG, $GITWEB_CONFIG_SYSTEM);
 625 sub evaluate_gitweb_config {
 626         our $GITWEB_CONFIG = $ENV{'GITWEB_CONFIG'} || "++GITWEB_CONFIG++";
 627         our $GITWEB_CONFIG_SYSTEM = $ENV{'GITWEB_CONFIG_SYSTEM'} || "++GITWEB_CONFIG_SYSTEM++";
 628         # die if there are errors parsing config file
 629         if (-e $GITWEB_CONFIG) {
 630                 do $GITWEB_CONFIG;
 631                 die $@ if $@;
 632         } elsif (-e $GITWEB_CONFIG_SYSTEM) {
 633                 do $GITWEB_CONFIG_SYSTEM;
 634                 die $@ if $@;
 635         }
 636 }
 637
 638 # Get loadavg of system, to compare against $maxload.
 639 # Currently it requires '/proc/loadavg' present to get loadavg;
 640 # if it is not present it returns 0, which means no load checking.
 641 sub get_loadavg {
 642         if( -e '/proc/loadavg' ){
 643                 open my $fd, '<', '/proc/loadavg'
 644                         or return 0;
 645                 my @load = split(/\s+/, scalar <$fd>);
 646                 close $fd;
 647
 648                 # The first three columns measure CPU and IO utilization of the last one,
 649                 # five, and 10 minute periods.  The fourth column shows the number of
 650                 # currently running processes and the total number of processes in the m/n
 651                 # format.  The last column displays the last process ID used.
 652                 return $load[0] || 0;
 653         }
 654         # additional checks for load average should go here for things that don't export
 655         # /proc/loadavg
 656
 657         return 0;
 658 }
 659
 660 # version of the core git binary
 661 our $git_version;
 662 sub evaluate_git_version {
 663         our $git_version = qx("$GIT" --version) =~ m/git version (.*)$/ ? $1 : "unknown";
 664         $number_of_git_cmds++;
 665 }
 666
 667 sub check_loadavg {
 668         if (defined $maxload && get_loadavg() > $maxload) {
 669                 die_error(503, "The load average on the server is too high");
 670         }
 671 }
 672
 673 # ======================================================================
 674 # input validation and dispatch
 675
 676 # input parameters can be collected from a variety of sources (presently, CGI
 677 # and PATH_INFO), so we define an %input_params hash that collects them all
 678 # together during validation: this allows subsequent uses (e.g. href()) to be
 679 # agnostic of the parameter origin
 680
 681 our %input_params = ();
 682
 683 # input parameters are stored with the long parameter name as key. This will
 684 # also be used in the href subroutine to convert parameters to their CGI
 685 # equivalent, and since the href() usage is the most frequent one, we store
 686 # the name -> CGI key mapping here, instead of the reverse.
 687 #
 688 # XXX: Warning: If you touch this, check the search form for updating,
 689 # too.
 690
 691 our @cgi_param_mapping = (
 692         project => "p",
 693         action => "a",
 694         file_name => "f",
 695         file_parent => "fp",
 696         hash => "h",
 697         hash_parent => "hp",
 698         hash_base => "hb",
 699         hash_parent_base => "hpb",
 700         page => "pg",
 701         order => "o",
 702         searchtext => "s",
 703         searchtype => "st",
 704         snapshot_format => "sf",
 705         extra_options => "opt",
 706         search_use_regexp => "sr",
 707         # this must be last entry (for manipulation from JavaScript)
 708         javascript => "js"
 709 );
 710 our %cgi_param_mapping = @cgi_param_mapping;
 711
 712 # we will also need to know the possible actions, for validation
 713 our %actions = (
 714         "blame" => \&git_blame,
 715         "blame_incremental" => \&git_blame_incremental,
 716         "blame_data" => \&git_blame_data,
 717         "blobdiff" => \&git_blobdiff,
 718         "blobdiff_plain" => \&git_blobdiff_plain,
 719         "blob" => \&git_blob,
 720         "blob_plain" => \&git_blob_plain,
 721         "commitdiff" => \&git_commitdiff,
 722         "commitdiff_plain" => \&git_commitdiff_plain,
 723         "commit" => \&git_commit,
 724         "forks" => \&git_forks,
 725         "heads" => \&git_heads,
 726         "history" => \&git_history,
 727         "log" => \&git_log,
 728         "patch" => \&git_patch,
 729         "patches" => \&git_patches,
 730         "remotes" => \&git_remotes,
 731         "rss" => \&git_rss,
 732         "atom" => \&git_atom,
 733         "search" => \&git_search,
 734         "search_help" => \&git_search_help,
 735         "shortlog" => \&git_shortlog,
 736         "summary" => \&git_summary,
 737         "tag" => \&git_tag,
 738         "tags" => \&git_tags,
 739         "tree" => \&git_tree,
 740         "snapshot" => \&git_snapshot,
 741         "object" => \&git_object,
 742         # those below don't need $project
 743         "opml" => \&git_opml,
 744         "project_list" => \&git_project_list,
 745         "project_index" => \&git_project_index,
 746 );
 747
 748 # finally, we have the hash of allowed extra_options for the commands that
 749 # allow them
 750 our %allowed_options = (
 751         "--no-merges" => [ qw(rss atom log shortlog history) ],
 752 );
 753
 754 # fill %input_params with the CGI parameters. All values except for 'opt'
 755 # should be single values, but opt can be an array. We should probably
 756 # build an array of parameters that can be multi-valued, but since for the time
 757 # being it's only this one, we just single it out
 758 sub evaluate_query_params {
 759         our $cgi;
 760
 761         while (my ($name, $symbol) = each %cgi_param_mapping) {
 762                 if ($symbol eq 'opt') {
 763                         $input_params{$name} = [ $cgi->param($symbol) ];
 764                 } else {
 765                         $input_params{$name} = $cgi->param($symbol);
 766                 }
 767         }
 768 }
 769
 770 # now read PATH_INFO and update the parameter list for missing parameters
 771 sub evaluate_path_info {
 772         return if defined $input_params{'project'};
 773         return if !$path_info;
 774         $path_info =~ s,^/+,,;
 775         return if !$path_info;
 776
 777         # find which part of PATH_INFO is project
 778         my $project = $path_info;
 779         $project =~ s,/+$,,;
 780         while ($project && !check_head_link("$projectroot/$project")) {
 781                 $project =~ s,/*[^/]*$,,;
 782         }
 783         return unless $project;
 784         $input_params{'project'} = $project;
 785
 786         # do not change any parameters if an action is given using the query string
 787         return if $input_params{'action'};
 788         $path_info =~ s,^\Q$project\E/*,,;
 789
 790         # next, check if we have an action
 791         my $action = $path_info;
 792         $action =~ s,/.*$,,;
 793         if (exists $actions{$action}) {
 794                 $path_info =~ s,^$action/*,,;
 795                 $input_params{'action'} = $action;
 796         }
 797
 798         # list of actions that want hash_base instead of hash, but can have no
 799         # pathname (f) parameter
 800         my @wants_base = (
 801                 'tree',
 802                 'history',
 803         );
 804
 805         # we want to catch, among others
 806         # [$hash_parent_base[:$file_parent]..]$hash_parent[:$file_name]
 807         my ($parentrefname, $parentpathname, $refname, $pathname) =
 808                 ($path_info =~ /^(?:(.+?)(?::(.+))?\.\.)?([^:]+?)?(?::(.+))?$/);
 809
 810         # first, analyze the 'current' part
 811         if (defined $pathname) {
 812                 # we got "branch:filename" or "branch:dir/"
 813                 # we could use git_get_type(branch:pathname), but:
 814                 # - it needs $git_dir
 815                 # - it does a git() call
 816                 # - the convention of terminating directories with a slash
 817                 #   makes it superfluous
 818                 # - embedding the action in the PATH_INFO would make it even
 819                 #   more superfluous
 820                 $pathname =~ s,^/+,,;
 821                 if (!$pathname || substr($pathname, -1) eq "/") {
 822                         $input_params{'action'} ||= "tree";
 823                         $pathname =~ s,/$,,;
 824                 } else {
 825                         # the default action depends on whether we had parent info
 826                         # or not
 827                         if ($parentrefname) {
 828                                 $input_params{'action'} ||= "blobdiff_plain";
 829                         } else {
 830                                 $input_params{'action'} ||= "blob_plain";
 831                         }
 832                 }
 833                 $input_params{'hash_base'} ||= $refname;
 834                 $input_params{'file_name'} ||= $pathname;
 835         } elsif (defined $refname) {
 836                 # we got "branch". In this case we have to choose if we have to
 837                 # set hash or hash_base.
 838                 #
 839                 # Most of the actions without a pathname only want hash to be
 840                 # set, except for the ones specified in @wants_base that want
 841                 # hash_base instead. It should also be noted that hand-crafted
 842                 # links having 'history' as an action and no pathname or hash
 843                 # set will fail, but that happens regardless of PATH_INFO.
 844                 if (defined $parentrefname) {
 845                         # if there is parent let the default be 'shortlog' action
 846                         # (for http://git.example.com/repo.git/A..B links); if there
 847                         # is no parent, dispatch will detect type of object and set
 848                         # action appropriately if required (if action is not set)
 849                         $input_params{'action'} ||= "shortlog";
 850                 }
 851                 if ($input_params{'action'} &&
 852                     grep { $_ eq $input_params{'action'} } @wants_base) {
 853                         $input_params{'hash_base'} ||= $refname;
 854                 } else {
 855                         $input_params{'hash'} ||= $refname;
 856                 }
 857         }
 858
 859         # next, handle the 'parent' part, if present
 860         if (defined $parentrefname) {
 861                 # a missing pathspec defaults to the 'current' filename, allowing e.g.
 862                 # someproject/blobdiff/oldrev..newrev:/filename
 863                 if ($parentpathname) {
 864                         $parentpathname =~ s,^/+,,;
 865                         $parentpathname =~ s,/$,,;
 866                         $input_params{'file_parent'} ||= $parentpathname;
 867                 } else {
 868                         $input_params{'file_parent'} ||= $input_params{'file_name'};
 869                 }
 870                 # we assume that hash_parent_base is wanted if a path was specified,
 871                 # or if the action wants hash_base instead of hash
 872                 if (defined $input_params{'file_parent'} ||
 873                         grep { $_ eq $input_params{'action'} } @wants_base) {
 874                         $input_params{'hash_parent_base'} ||= $parentrefname;
 875                 } else {
 876                         $input_params{'hash_parent'} ||= $parentrefname;
 877                 }
 878         }
 879
 880         # for the snapshot action, we allow URLs in the form
 881         # $project/snapshot/$hash.ext
 882         # where .ext determines the snapshot and gets removed from the
 883         # passed $refname to provide the $hash.
 884         #
 885         # To be able to tell that $refname includes the format extension, we
 886         # require the following two conditions to be satisfied:
 887         # - the hash input parameter MUST have been set from the $refname part
 888         #   of the URL (i.e. they must be equal)
 889         # - the snapshot format MUST NOT have been defined already (e.g. from
 890         #   CGI parameter sf)
 891         # It's also useless to try any matching unless $refname has a dot,
 892         # so we check for that too
 893         if (defined $input_params{'action'} &&
 894                 $input_params{'action'} eq 'snapshot' &&
 895                 defined $refname && index($refname, '.') != -1 &&
 896                 $refname eq $input_params{'hash'} &&
 897                 !defined $input_params{'snapshot_format'}) {
 898                 # We loop over the known snapshot formats, checking for
 899                 # extensions. Allowed extensions are both the defined suffix
 900                 # (which includes the initial dot already) and the snapshot
 901                 # format key itself, with a prepended dot
 902                 while (my ($fmt, $opt) = each %known_snapshot_formats) {
 903                         my $hash = $refname;
 904                         unless ($hash =~ s/(\Q$opt->{'suffix'}\E|\Q.$fmt\E)$//) {
 905                                 next;
 906                         }
 907                         my $sfx = $1;
 908                         # a valid suffix was found, so set the snapshot format
 909                         # and reset the hash parameter
 910                         $input_params{'snapshot_format'} = $fmt;
 911                         $input_params{'hash'} = $hash;
 912                         # we also set the format suffix to the one requested
 913                         # in the URL: this way a request for e.g. .tgz returns
 914                         # a .tgz instead of a .tar.gz
 915                         $known_snapshot_formats{$fmt}{'suffix'} = $sfx;
 916                         last;
 917                 }
 918         }
 919 }
 920
 921 our ($action, $project, $file_name, $file_parent, $hash, $hash_parent, $hash_base,
 922      $hash_parent_base, @extra_options, $page, $searchtype, $search_use_regexp,
 923      $searchtext, $search_regexp);
 924 sub evaluate_and_validate_params {
 925         our $action = $input_params{'action'};
 926         if (defined $action) {
 927                 if (!validate_action($action)) {
 928                         die_error(400, "Invalid action parameter");
 929                 }
 930         }
 931
 932         # parameters which are pathnames
 933         our $project = $input_params{'project'};
 934         if (defined $project) {
 935                 if (!validate_project($project)) {
 936                         undef $project;
 937                         die_error(404, "No such project");
 938                 }
 939         }
 940
 941         our $file_name = $input_params{'file_name'};
 942         if (defined $file_name) {
 943                 if (!validate_pathname($file_name)) {
 944                         die_error(400, "Invalid file parameter");
 945                 }
 946         }
 947
 948         our $file_parent = $input_params{'file_parent'};
 949         if (defined $file_parent) {
 950                 if (!validate_pathname($file_parent)) {
 951                         die_error(400, "Invalid file parent parameter");
 952                 }
 953         }
 954
 955         # parameters which are refnames
 956         our $hash = $input_params{'hash'};
 957         if (defined $hash) {
 958                 if (!validate_refname($hash)) {
 959                         die_error(400, "Invalid hash parameter");
 960                 }
 961         }
 962
 963         our $hash_parent = $input_params{'hash_parent'};
 964         if (defined $hash_parent) {
 965                 if (!validate_refname($hash_parent)) {
 966                         die_error(400, "Invalid hash parent parameter");
 967                 }
 968         }
 969
 970         our $hash_base = $input_params{'hash_base'};
 971         if (defined $hash_base) {
 972                 if (!validate_refname($hash_base)) {
 973                         die_error(400, "Invalid hash base parameter");
 974                 }
 975         }
 976
 977         our @extra_options = @{$input_params{'extra_options'}};
 978         # @extra_options is always defined, since it can only be (currently) set from
 979         # CGI, and $cgi->param() returns the empty array in array context if the param
 980         # is not set
 981         foreach my $opt (@extra_options) {
 982                 if (not exists $allowed_options{$opt}) {
 983                         die_error(400, "Invalid option parameter");
 984                 }
 985                 if (not grep(/^$action$/, @{$allowed_options{$opt}})) {
 986                         die_error(400, "Invalid option parameter for this action");
 987                 }
 988         }
 989
 990         our $hash_parent_base = $input_params{'hash_parent_base'};
 991         if (defined $hash_parent_base) {
 992                 if (!validate_refname($hash_parent_base)) {
 993                         die_error(400, "Invalid hash parent base parameter");
 994                 }
 995         }
 996
 997         # other parameters
 998         our $page = $input_params{'page'};
 999         if (defined $page) {
1000                 if ($page =~ m/[^0-9]/) {
1001                         die_error(400, "Invalid page parameter");
1002                 }
1003         }
1004
1005         our $searchtype = $input_params{'searchtype'};
1006         if (defined $searchtype) {
1007                 if ($searchtype =~ m/[^a-z]/) {
1008                         die_error(400, "Invalid searchtype parameter");
1009                 }
1010         }
1011
1012         our $search_use_regexp = $input_params{'search_use_regexp'};
1013
1014         our $searchtext = $input_params{'searchtext'};
1015         our $search_regexp;
1016         if (defined $searchtext) {
1017                 if (length($searchtext) < 2) {
1018                         die_error(403, "At least two characters are required for search parameter");
1019                 }
1020                 $search_regexp = $search_use_regexp ? $searchtext : quotemeta $searchtext;
1021         }
1022 }
1023
1024 # path to the current git repository
1025 our $git_dir;
1026 sub evaluate_git_dir {
1027         our $git_dir = "$projectroot/$project" if $project;
1028 }
1029
1030 our (@snapshot_fmts, $git_avatar);
1031 sub configure_gitweb_features {
1032         # list of supported snapshot formats
1033         our @snapshot_fmts = gitweb_get_feature('snapshot');
1034         @snapshot_fmts = filter_snapshot_fmts(@snapshot_fmts);
1035
1036         # check that the avatar feature is set to a known provider name,
1037         # and for each provider check if the dependencies are satisfied.
1038         # if the provider name is invalid or the dependencies are not met,
1039         # reset $git_avatar to the empty string.
1040         our ($git_avatar) = gitweb_get_feature('avatar');
1041         if ($git_avatar eq 'gravatar') {
1042                 $git_avatar = '' unless (eval { require Digest::MD5; 1; });
1043         } elsif ($git_avatar eq 'picon') {
1044                 # no dependencies
1045         } else {
1046                 $git_avatar = '';
1047         }
1048 }
1049
1050 # custom error handler: 'die <message>' is Internal Server Error
1051 sub handle_errors_html {
1052         my $msg = shift; # it is already HTML escaped
1053
1054         # to avoid infinite loop where error occurs in die_error,
1055         # change handler to default handler, disabling handle_errors_html
1056         set_message("Error occured when inside die_error:\n$msg");
1057
1058         # you cannot jump out of die_error when called as error handler;
1059         # the subroutine set via CGI::Carp::set_message is called _after_
1060         # HTTP headers are already written, so it cannot write them itself
1061         die_error(undef, undef, $msg, -error_handler => 1, -no_http_header => 1);
1062 }
1063 set_message(\&handle_errors_html);
1064
1065 # dispatch
1066 sub dispatch {
1067         if (!defined $action) {
1068                 if (defined $hash) {
1069                         $action = git_get_type($hash);
1070                 } elsif (defined $hash_base && defined $file_name) {
1071                         $action = git_get_type("$hash_base:$file_name");
1072                 } elsif (defined $project) {
1073                         $action = 'summary';
1074                 } else {
1075                         $action = 'project_list';
1076                 }
1077         }
1078         if (!defined($actions{$action})) {
1079                 die_error(400, "Unknown action");
1080         }
1081         if ($action !~ m/^(?:opml|project_list|project_index)$/ &&
1082             !$project) {
1083                 die_error(400, "Project needed");
1084         }
1085         $actions{$action}->();
1086 }
1087
1088 sub reset_timer {
1089         our $t0 = [ gettimeofday() ]
1090                 if defined $t0;
1091         our $number_of_git_cmds = 0;
1092 }
1093
1094 our $first_request = 1;
1095 sub run_request {
1096         reset_timer();
1097
1098         evaluate_uri();
1099         if ($first_request) {
1100                 evaluate_gitweb_config();
1101                 evaluate_git_version();
1102         }
1103         if ($per_request_config) {
1104                 if (ref($per_request_config) eq 'CODE') {
1105                         $per_request_config->();
1106                 } elsif (!$first_request) {
1107                         evaluate_gitweb_config();
1108                 }
1109         }
1110         check_loadavg();
1111
1112         # $projectroot and $projects_list might be set in gitweb config file
1113         $projects_list ||= $projectroot;
1114
1115         evaluate_query_params();
1116         evaluate_path_info();
1117         evaluate_and_validate_params();
1118         evaluate_git_dir();
1119
1120         configure_gitweb_features();
1121
1122         dispatch();
1123 }
1124
1125 our $is_last_request = sub { 1 };
1126 our ($pre_dispatch_hook, $post_dispatch_hook, $pre_listen_hook);
1127 our $CGI = 'CGI';
1128 our $cgi;
1129 sub configure_as_fcgi {
1130         require CGI::Fast;
1131         our $CGI = 'CGI::Fast';
1132
1133         my $request_number = 0;
1134         # let each child service 100 requests
1135         our $is_last_request = sub { ++$request_number > 100 };
1136 }
1137 sub evaluate_argv {
1138         my $script_name = $ENV{'SCRIPT_NAME'} || $ENV{'SCRIPT_FILENAME'} || __FILE__;
1139         configure_as_fcgi()
1140                 if $script_name =~ /\.fcgi$/;
1141
1142         return unless (@ARGV);
1143
1144         require Getopt::Long;
1145         Getopt::Long::GetOptions(
1146                 'fastcgi|fcgi|f' => \&configure_as_fcgi,
1147                 'nproc|n=i' => sub {
1148                         my ($arg, $val) = @_;
1149                         return unless eval { require FCGI::ProcManager; 1; };
1150                         my $proc_manager = FCGI::ProcManager->new({
1151                                 n_processes => $val,
1152                         });
1153                         our $pre_listen_hook    = sub { $proc_manager->pm_manage()        };
1154                         our $pre_dispatch_hook  = sub { $proc_manager->pm_pre_dispatch()  };
1155                         our $post_dispatch_hook = sub { $proc_manager->pm_post_dispatch() };
1156                 },
1157         );
1158 }
1159
1160 sub run {
1161         evaluate_argv();
1162
1163         $first_request = 1;
1164         $pre_listen_hook->()
1165                 if $pre_listen_hook;
1166
1167  REQUEST:
1168         while ($cgi = $CGI->new()) {
1169                 $pre_dispatch_hook->()
1170                         if $pre_dispatch_hook;
1171
1172                 run_request();
1173
1174                 $post_dispatch_hook->()
1175                         if $post_dispatch_hook;
1176                 $first_request = 0;
1177
1178                 last REQUEST if ($is_last_request->());
1179         }
1180
1181  DONE_GITWEB:
1182         1;
1183 }
1184
1185 run();
1186
1187 if (defined caller) {
1188         # wrapped in a subroutine processing requests,
1189         # e.g. mod_perl with ModPerl::Registry, or PSGI with Plack::App::WrapCGI
1190         return;
1191 } else {
1192         # pure CGI script, serving single request
1193         exit;
1194 }
1195
1196 ## ======================================================================
1197 ## action links
1198
1199 # possible values of extra options
1200 # -full => 0|1      - use absolute/full URL ($my_uri/$my_url as base)
1201 # -replay => 1      - start from a current view (replay with modifications)
1202 # -path_info => 0|1 - don't use/use path_info URL (if possible)
1203 # -anchor => ANCHOR - add #ANCHOR to end of URL, implies -replay if used alone
1204 sub href {
1205         my %params = @_;
1206         # default is to use -absolute url() i.e. $my_uri
1207         my $href = $params{-full} ? $my_url : $my_uri;
1208
1209         # implicit -replay, must be first of implicit params
1210         $params{-replay} = 1 if (keys %params == 1 && $params{-anchor});
1211
1212         $params{'project'} = $project unless exists $params{'project'};
1213
1214         if ($params{-replay}) {
1215                 while (my ($name, $symbol) = each %cgi_param_mapping) {
1216                         if (!exists $params{$name}) {
1217                                 $params{$name} = $input_params{$name};
1218                         }
1219                 }
1220         }
1221
1222         my $use_pathinfo = gitweb_check_feature('pathinfo');
1223         if (defined $params{'project'} &&
1224             (exists $params{-path_info} ? $params{-path_info} : $use_pathinfo)) {
1225                 # try to put as many parameters as possible in PATH_INFO:
1226                 #   - project name
1227                 #   - action
1228                 #   - hash_parent or hash_parent_base:/file_parent
1229                 #   - hash or hash_base:/filename
1230                 #   - the snapshot_format as an appropriate suffix
1231
1232                 # When the script is the root DirectoryIndex for the domain,
1233                 # $href here would be something like http://gitweb.example.com/
1234                 # Thus, we strip any trailing / from $href, to spare us double
1235                 # slashes in the final URL
1236                 $href =~ s,/$,,;
1237
1238                 # Then add the project name, if present
1239                 $href .= "/".esc_path_info($params{'project'});
1240                 delete $params{'project'};
1241
1242                 # since we destructively absorb parameters, we keep this
1243                 # boolean that remembers if we're handling a snapshot
1244                 my $is_snapshot = $params{'action'} eq 'snapshot';
1245
1246                 # Summary just uses the project path URL, any other action is
1247                 # added to the URL
1248                 if (defined $params{'action'}) {
1249                         $href .= "/".esc_path_info($params{'action'})
1250                                 unless $params{'action'} eq 'summary';
1251                         delete $params{'action'};
1252                 }
1253
1254                 # Next, we put hash_parent_base:/file_parent..hash_base:/file_name,
1255                 # stripping nonexistent or useless pieces
1256                 $href .= "/" if ($params{'hash_base'} || $params{'hash_parent_base'}
1257                         || $params{'hash_parent'} || $params{'hash'});
1258                 if (defined $params{'hash_base'}) {
1259                         if (defined $params{'hash_parent_base'}) {
1260                                 $href .= esc_path_info($params{'hash_parent_base'});
1261                                 # skip the file_parent if it's the same as the file_name
1262                                 if (defined $params{'file_parent'}) {
1263                                         if (defined $params{'file_name'} && $params{'file_parent'} eq $params{'file_name'}) {
1264                                                 delete $params{'file_parent'};
1265                                         } elsif ($params{'file_parent'} !~ /\.\./) {
1266                                                 $href .= ":/".esc_path_info($params{'file_parent'});
1267                                                 delete $params{'file_parent'};
1268                                         }
1269                                 }
1270                                 $href .= "..";
1271                                 delete $params{'hash_parent'};
1272                                 delete $params{'hash_parent_base'};
1273                         } elsif (defined $params{'hash_parent'}) {
1274                                 $href .= esc_path_info($params{'hash_parent'}). "..";
1275                                 delete $params{'hash_parent'};
1276                         }
1277
1278                         $href .= esc_path_info($params{'hash_base'});
1279                         if (defined $params{'file_name'} && $params{'file_name'} !~ /\.\./) {
1280                                 $href .= ":/".esc_path_info($params{'file_name'});
1281                                 delete $params{'file_name'};
1282                         }
1283                         delete $params{'hash'};
1284                         delete $params{'hash_base'};
1285                 } elsif (defined $params{'hash'}) {
1286                         $href .= esc_path_info($params{'hash'});
1287                         delete $params{'hash'};
1288                 }
1289
1290                 # If the action was a snapshot, we can absorb the
1291                 # snapshot_format parameter too
1292                 if ($is_snapshot) {
1293                         my $fmt = $params{'snapshot_format'};
1294                         # snapshot_format should always be defined when href()
1295                         # is called, but just in case some code forgets, we
1296                         # fall back to the default
1297                         $fmt ||= $snapshot_fmts[0];
1298                         $href .= $known_snapshot_formats{$fmt}{'suffix'};
1299                         delete $params{'snapshot_format'};
1300                 }
1301         }
1302
1303         # now encode the parameters explicitly
1304         my @result = ();
1305         for (my $i = 0; $i < @cgi_param_mapping; $i += 2) {
1306                 my ($name, $symbol) = ($cgi_param_mapping[$i], $cgi_param_mapping[$i+1]);
1307                 if (defined $params{$name}) {
1308                         if (ref($params{$name}) eq "ARRAY") {
1309                                 foreach my $par (@{$params{$name}}) {
1310                                         push @result, $symbol . "=" . esc_param($par);
1311                                 }
1312                         } else {
1313                                 push @result, $symbol . "=" . esc_param($params{$name});
1314                         }
1315                 }
1316         }
1317         $href .= "?" . join(';', @result) if scalar @result;
1318
1319         # final transformation: trailing spaces must be escaped (URI-encoded)
1320         $href =~ s/(\s+)$/CGI::escape($1)/e;
1321
1322         if ($params{-anchor}) {
1323                 $href .= "#".esc_param($params{-anchor});
1324         }
1325
1326         return $href;
1327 }
1328
1329
1330 ## ======================================================================
1331 ## validation, quoting/unquoting and escaping
1332
1333 sub validate_action {
1334         my $input = shift || return undef;
1335         return undef unless exists $actions{$input};
1336         return $input;
1337 }
1338
1339 sub validate_project {
1340         my $input = shift || return undef;
1341         if (!validate_pathname($input) ||
1342                 !(-d "$projectroot/$input") ||
1343                 !check_export_ok("$projectroot/$input") ||
1344                 ($strict_export && !project_in_list($input))) {
1345                 return undef;
1346         } else {
1347                 return $input;
1348         }
1349 }
1350
1351 sub validate_pathname {
1352         my $input = shift || return undef;
1353
1354         # no '.' or '..' as elements of path, i.e. no '.' nor '..'
1355         # at the beginning, at the end, and between slashes.
1356         # also this catches doubled slashes
1357         if ($input =~ m!(^|/)(|\.|\.\.)(/|$)!) {
1358                 return undef;
1359         }
1360         # no null characters
1361         if ($input =~ m!\0!) {
1362                 return undef;
1363         }
1364         return $input;
1365 }
1366
1367 sub validate_refname {
1368         my $input = shift || return undef;
1369
1370         # textual hashes are O.K.
1371         if ($input =~ m/^[0-9a-fA-F]{40}$/) {
1372                 return $input;
1373         }
1374         # it must be correct pathname
1375         $input = validate_pathname($input)
1376                 or return undef;
1377         # restrictions on ref name according to git-check-ref-format
1378         if ($input =~ m!(/\.|\.\.|[\000-\040\177 ~^:?*\[]|/$)!) {
1379                 return undef;
1380         }
1381         return $input;
1382 }
1383
1384 # decode sequences of octets in utf8 into Perl's internal form,
1385 # which is utf-8 with utf8 flag set if needed.  gitweb writes out
1386 # in utf-8 thanks to "binmode STDOUT, ':utf8'" at beginning
1387 sub to_utf8 {
1388         my $str = shift;
1389         return undef unless defined $str;
1390         if (utf8::valid($str)) {
1391                 utf8::decode($str);
1392                 return $str;
1393         } else {
1394                 return decode($fallback_encoding, $str, Encode::FB_DEFAULT);
1395         }
1396 }
1397
1398 # quote unsafe chars, but keep the slash, even when it's not
1399 # correct, but quoted slashes look too horrible in bookmarks
1400 sub esc_param {
1401         my $str = shift;
1402         return undef unless defined $str;
1403         $str =~ s/([^A-Za-z0-9\-_.~()\/:@ ]+)/CGI::escape($1)/eg;
1404         $str =~ s/ /\+/g;
1405         return $str;
1406 }
1407
1408 # the quoting rules for path_info fragment are slightly different
1409 sub esc_path_info {
1410         my $str = shift;
1411         return undef unless defined $str;
1412
1413         # path_info doesn't treat '+' as space (specially), but '?' must be escaped
1414         $str =~ s/([^A-Za-z0-9\-_.~();\/;:@&= +]+)/CGI::escape($1)/eg;
1415
1416         return $str;
1417 }
1418
1419 # quote unsafe chars in whole URL, so some characters cannot be quoted
1420 sub esc_url {
1421         my $str = shift;
1422         return undef unless defined $str;
1423         $str =~ s/([^A-Za-z0-9\-_.~();\/;?:@&= ]+)/CGI::escape($1)/eg;
1424         $str =~ s/ /\+/g;
1425         return $str;
1426 }
1427
1428 # quote unsafe characters in HTML attributes
1429 sub esc_attr {
1430
1431         # for XHTML conformance escaping '"' to '&quot;' is not enough
1432         return esc_html(@_);
1433 }
1434
1435 # replace invalid utf8 character with SUBSTITUTION sequence
1436 sub esc_html {
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:]])|(($1 ne "\t") ? quot_cec($1) : $1)|eg;
1448         return $str;
1449 }
1450
1451 # quote control characters and escape filename to HTML
1452 sub esc_path {
1453         my $str = shift;
1454         my %opts = @_;
1455
1456         return undef unless defined $str;
1457
1458         $str = to_utf8($str);
1459         $str = $cgi->escapeHTML($str);
1460         if ($opts{'-nbsp'}) {
1461                 $str =~ s/ /&nbsp;/g;
1462         }
1463         $str =~ s|([[:cntrl:]])|quot_cec($1)|eg;
1464         return $str;
1465 }
1466
1467 # Make control characters "printable", using character escape codes (CEC)
1468 sub quot_cec {
1469         my $cntrl = shift;
1470         my %opts = @_;
1471         my %es = ( # character escape codes, aka escape sequences
1472                 "\t" => '\t',   # tab            (HT)
1473                 "\n" => '\n',   # line feed      (LF)
1474                 "\r" => '\r',   # carrige return (CR)
1475                 "\f" => '\f',   # form feed      (FF)
1476                 "\b" => '\b',   # backspace      (BS)
1477                 "\a" => '\a',   # alarm (bell)   (BEL)
1478                 "\e" => '\e',   # escape         (ESC)
1479                 "\013" => '\v', # vertical tab   (VT)
1480                 "\000" => '\0', # nul character  (NUL)
1481         );
1482         my $chr = ( (exists $es{$cntrl})
1483                     ? $es{$cntrl}
1484                     : sprintf('\%2x', ord($cntrl)) );
1485         if ($opts{-nohtml}) {
1486                 return $chr;
1487         } else {
1488                 return "<span class=\"cntrl\">$chr</span>";
1489         }
1490 }
1491
1492 # Alternatively use unicode control pictures codepoints,
1493 # Unicode "printable representation" (PR)
1494 sub quot_upr {
1495         my $cntrl = shift;
1496         my %opts = @_;
1497
1498         my $chr = sprintf('&#%04d;', 0x2400+ord($cntrl));
1499         if ($opts{-nohtml}) {
1500                 return $chr;
1501         } else {
1502                 return "<span class=\"cntrl\">$chr</span>";
1503         }
1504 }
1505
1506 # git may return quoted and escaped filenames
1507 sub unquote {
1508         my $str = shift;
1509
1510         sub unq {
1511                 my $seq = shift;
1512                 my %es = ( # character escape codes, aka escape sequences
1513                         't' => "\t",   # tab            (HT, TAB)
1514                         'n' => "\n",   # newline        (NL)
1515                         'r' => "\r",   # return         (CR)
1516                         'f' => "\f",   # form feed      (FF)
1517                         'b' => "\b",   # backspace      (BS)
1518                         'a' => "\a",   # alarm (bell)   (BEL)
1519                         'e' => "\e",   # escape         (ESC)
1520                         'v' => "\013", # vertical tab   (VT)
1521                 );
1522
1523                 if ($seq =~ m/^[0-7]{1,3}$/) {
1524                         # octal char sequence
1525                         return chr(oct($seq));
1526                 } elsif (exists $es{$seq}) {
1527                         # C escape sequence, aka character escape code
1528                         return $es{$seq};
1529                 }
1530                 # quoted ordinary character
1531                 return $seq;
1532         }
1533
1534         if ($str =~ m/^"(.*)"$/) {
1535                 # needs unquoting
1536                 $str = $1;
1537                 $str =~ s/\\([^0-7]|[0-7]{1,3})/unq($1)/eg;
1538         }
1539         return $str;
1540 }
1541
1542 # escape tabs (convert tabs to spaces)
1543 sub untabify {
1544         my $line = shift;
1545
1546         while ((my $pos = index($line, "\t")) != -1) {
1547                 if (my $count = (8 - ($pos % 8))) {
1548                         my $spaces = ' ' x $count;
1549                         $line =~ s/\t/$spaces/;
1550                 }
1551         }
1552
1553         return $line;
1554 }
1555
1556 sub project_in_list {
1557         my $project = shift;
1558         my @list = git_get_projects_list();
1559         return @list && scalar(grep { $_->{'path'} eq $project } @list);
1560 }
1561
1562 ## ----------------------------------------------------------------------
1563 ## HTML aware string manipulation
1564
1565 # Try to chop given string on a word boundary between position
1566 # $len and $len+$add_len. If there is no word boundary there,
1567 # chop at $len+$add_len. Do not chop if chopped part plus ellipsis
1568 # (marking chopped part) would be longer than given string.
1569 sub chop_str {
1570         my $str = shift;
1571         my $len = shift;
1572         my $add_len = shift || 10;
1573         my $where = shift || 'right'; # 'left' | 'center' | 'right'
1574
1575         # Make sure perl knows it is utf8 encoded so we don't
1576         # cut in the middle of a utf8 multibyte char.
1577         $str = to_utf8($str);
1578
1579         # allow only $len chars, but don't cut a word if it would fit in $add_len
1580         # if it doesn't fit, cut it if it's still longer than the dots we would add
1581         # remove chopped character entities entirely
1582
1583         # when chopping in the middle, distribute $len into left and right part
1584         # return early if chopping wouldn't make string shorter
1585         if ($where eq 'center') {
1586                 return $str if ($len + 5 >= length($str)); # filler is length 5
1587                 $len = int($len/2);
1588         } else {
1589                 return $str if ($len + 4 >= length($str)); # filler is length 4
1590         }
1591
1592         # regexps: ending and beginning with word part up to $add_len
1593         my $endre = qr/.{$len}\w{0,$add_len}/;
1594         my $begre = qr/\w{0,$add_len}.{$len}/;
1595
1596         if ($where eq 'left') {
1597                 $str =~ m/^(.*?)($begre)$/;
1598                 my ($lead, $body) = ($1, $2);
1599                 if (length($lead) > 4) {
1600                         $lead = " ...";
1601                 }
1602                 return "$lead$body";
1603
1604         } elsif ($where eq 'center') {
1605                 $str =~ m/^($endre)(.*)$/;
1606                 my ($left, $str)  = ($1, $2);
1607                 $str =~ m/^(.*?)($begre)$/;
1608                 my ($mid, $right) = ($1, $2);
1609                 if (length($mid) > 5) {
1610                         $mid = " ... ";
1611                 }
1612                 return "$left$mid$right";
1613
1614         } else {
1615                 $str =~ m/^($endre)(.*)$/;
1616                 my $body = $1;
1617                 my $tail = $2;
1618                 if (length($tail) > 4) {
1619                         $tail = "... ";
1620                 }
1621                 return "$body$tail";
1622         }
1623 }
1624
1625 # takes the same arguments as chop_str, but also wraps a <span> around the
1626 # result with a title attribute if it does get chopped. Additionally, the
1627 # string is HTML-escaped.
1628 sub chop_and_escape_str {
1629         my ($str) = @_;
1630
1631         my $chopped = chop_str(@_);
1632         if ($chopped eq $str) {
1633                 return esc_html($chopped);
1634         } else {
1635                 $str =~ s/[[:cntrl:]]/?/g;
1636                 return $cgi->span({-title=>$str}, esc_html($chopped));
1637         }
1638 }
1639
1640 ## ----------------------------------------------------------------------
1641 ## functions returning short strings
1642
1643 # CSS class for given age value (in seconds)
1644 sub age_class {
1645         my $age = shift;
1646
1647         if (!defined $age) {
1648                 return "noage";
1649         } elsif ($age < 60*60*2) {
1650                 return "age0";
1651         } elsif ($age < 60*60*24*2) {
1652                 return "age1";
1653         } else {
1654                 return "age2";
1655         }
1656 }
1657
1658 # convert age in seconds to "nn units ago" string
1659 sub age_string {
1660         my $age = shift;
1661         my $age_str;
1662
1663         if ($age > 60*60*24*365*2) {
1664                 $age_str = (int $age/60/60/24/365);
1665                 $age_str .= " years ago";
1666         } elsif ($age > 60*60*24*(365/12)*2) {
1667                 $age_str = int $age/60/60/24/(365/12);
1668                 $age_str .= " months ago";
1669         } elsif ($age > 60*60*24*7*2) {
1670                 $age_str = int $age/60/60/24/7;
1671                 $age_str .= " weeks ago";
1672         } elsif ($age > 60*60*24*2) {
1673                 $age_str = int $age/60/60/24;
1674                 $age_str .= " days ago";
1675         } elsif ($age > 60*60*2) {
1676                 $age_str = int $age/60/60;
1677                 $age_str .= " hours ago";
1678         } elsif ($age > 60*2) {
1679                 $age_str = int $age/60;
1680                 $age_str .= " min ago";
1681         } elsif ($age > 2) {
1682                 $age_str = int $age;
1683                 $age_str .= " sec ago";
1684         } else {
1685                 $age_str .= " right now";
1686         }
1687         return $age_str;
1688 }
1689
1690 use constant {
1691         S_IFINVALID => 0030000,
1692         S_IFGITLINK => 0160000,
1693 };
1694
1695 # submodule/subproject, a commit object reference
1696 sub S_ISGITLINK {
1697         my $mode = shift;
1698
1699         return (($mode & S_IFMT) == S_IFGITLINK)
1700 }
1701
1702 # convert file mode in octal to symbolic file mode string
1703 sub mode_str {
1704         my $mode = oct shift;
1705
1706         if (S_ISGITLINK($mode)) {
1707                 return 'm---------';
1708         } elsif (S_ISDIR($mode & S_IFMT)) {
1709                 return 'drwxr-xr-x';
1710         } elsif (S_ISLNK($mode)) {
1711                 return 'lrwxrwxrwx';
1712         } elsif (S_ISREG($mode)) {
1713                 # git cares only about the executable bit
1714                 if ($mode & S_IXUSR) {
1715                         return '-rwxr-xr-x';
1716                 } else {
1717                         return '-rw-r--r--';
1718                 };
1719         } else {
1720                 return '----------';
1721         }
1722 }
1723
1724 # convert file mode in octal to file type string
1725 sub file_type {
1726         my $mode = shift;
1727
1728         if ($mode !~ m/^[0-7]+$/) {
1729                 return $mode;
1730         } else {
1731                 $mode = oct $mode;
1732         }
1733
1734         if (S_ISGITLINK($mode)) {
1735                 return "submodule";
1736         } elsif (S_ISDIR($mode & S_IFMT)) {
1737                 return "directory";
1738         } elsif (S_ISLNK($mode)) {
1739                 return "symlink";
1740         } elsif (S_ISREG($mode)) {
1741                 return "file";
1742         } else {
1743                 return "unknown";
1744         }
1745 }
1746
1747 # convert file mode in octal to file type description string
1748 sub file_type_long {
1749         my $mode = shift;
1750
1751         if ($mode !~ m/^[0-7]+$/) {
1752                 return $mode;
1753         } else {
1754                 $mode = oct $mode;
1755         }
1756
1757         if (S_ISGITLINK($mode)) {
1758                 return "submodule";
1759         } elsif (S_ISDIR($mode & S_IFMT)) {
1760                 return "directory";
1761         } elsif (S_ISLNK($mode)) {
1762                 return "symlink";
1763         } elsif (S_ISREG($mode)) {
1764                 if ($mode & S_IXUSR) {
1765                         return "executable";
1766                 } else {
1767                         return "file";
1768                 };
1769         } else {
1770                 return "unknown";
1771         }
1772 }
1773
1774
1775 ## ----------------------------------------------------------------------
1776 ## functions returning short HTML fragments, or transforming HTML fragments
1777 ## which don't belong to other sections
1778
1779 # format line of commit message.
1780 sub format_log_line_html {
1781         my $line = shift;
1782
1783         $line = esc_html($line, -nbsp=>1);
1784         $line =~ s{\b([0-9a-fA-F]{8,40})\b}{
1785                 $cgi->a({-href => href(action=>"object", hash=>$1),
1786                                         -class => "text"}, $1);
1787         }eg;
1788
1789         return $line;
1790 }
1791
1792 # format marker of refs pointing to given object
1793
1794 # the destination action is chosen based on object type and current context:
1795 # - for annotated tags, we choose the tag view unless it's the current view
1796 #   already, in which case we go to shortlog view
1797 # - for other refs, we keep the current view if we're in history, shortlog or
1798 #   log view, and select shortlog otherwise
1799 sub format_ref_marker {
1800         my ($refs, $id) = @_;
1801         my $markers = '';
1802
1803         if (defined $refs->{$id}) {
1804                 foreach my $ref (@{$refs->{$id}}) {
1805                         # this code exploits the fact that non-lightweight tags are the
1806                         # only indirect objects, and that they are the only objects for which
1807                         # we want to use tag instead of shortlog as action
1808                         my ($type, $name) = qw();
1809                         my $indirect = ($ref =~ s/\^\{\}$//);
1810                         # e.g. tags/v2.6.11 or heads/next
1811                         if ($ref =~ m!^(.*?)s?/(.*)$!) {
1812                                 $type = $1;
1813                                 $name = $2;
1814                         } else {
1815                                 $type = "ref";
1816                                 $name = $ref;
1817                         }
1818
1819                         my $class = $type;
1820                         $class .= " indirect" if $indirect;
1821
1822                         my $dest_action = "shortlog";
1823
1824                         if ($indirect) {
1825                                 $dest_action = "tag" unless $action eq "tag";
1826                         } elsif ($action =~ /^(history|(short)?log)$/) {
1827                                 $dest_action = $action;
1828                         }
1829
1830                         my $dest = "";
1831                         $dest .= "refs/" unless $ref =~ m!^refs/!;
1832                         $dest .= $ref;
1833
1834                         my $link = $cgi->a({
1835                                 -href => href(
1836                                         action=>$dest_action,
1837                                         hash=>$dest
1838                                 )}, $name);
1839
1840                         $markers .= " <span class=\"".esc_attr($class)."\" title=\"".esc_attr($ref)."\">" .
1841                                 $link . "</span>";
1842                 }
1843         }
1844
1845         if ($markers) {
1846                 return ' <span class="refs">'. $markers . '</span>';
1847         } else {
1848                 return "";
1849         }
1850 }
1851
1852 # format, perhaps shortened and with markers, title line
1853 sub format_subject_html {
1854         my ($long, $short, $href, $extra) = @_;
1855         $extra = '' unless defined($extra);
1856
1857         if (length($short) < length($long)) {
1858                 $long =~ s/[[:cntrl:]]/?/g;
1859                 return $cgi->a({-href => $href, -class => "list subject",
1860                                 -title => to_utf8($long)},
1861                        esc_html($short)) . $extra;
1862         } else {
1863                 return $cgi->a({-href => $href, -class => "list subject"},
1864                        esc_html($long)) . $extra;
1865         }
1866 }
1867
1868 # Rather than recomputing the url for an email multiple times, we cache it
1869 # after the first hit. This gives a visible benefit in views where the avatar
1870 # for the same email is used repeatedly (e.g. shortlog).
1871 # The cache is shared by all avatar engines (currently gravatar only), which
1872 # are free to use it as preferred. Since only one avatar engine is used for any
1873 # given page, there's no risk for cache conflicts.
1874 our %avatar_cache = ();
1875
1876 # Compute the picon url for a given email, by using the picon search service over at
1877 # http://www.cs.indiana.edu/picons/search.html
1878 sub picon_url {
1879         my $email = lc shift;
1880         if (!$avatar_cache{$email}) {
1881                 my ($user, $domain) = split('@', $email);
1882                 $avatar_cache{$email} =
1883                         "http://www.cs.indiana.edu/cgi-pub/kinzler/piconsearch.cgi/" .
1884                         "$domain/$user/" .
1885                         "users+domains+unknown/up/single";
1886         }
1887         return $avatar_cache{$email};
1888 }
1889
1890 # Compute the gravatar url for a given email, if it's not in the cache already.
1891 # Gravatar stores only the part of the URL before the size, since that's the
1892 # one computationally more expensive. This also allows reuse of the cache for
1893 # different sizes (for this particular engine).
1894 sub gravatar_url {
1895         my $email = lc shift;
1896         my $size = shift;
1897         $avatar_cache{$email} ||=
1898                 "http://www.gravatar.com/avatar/" .
1899                         Digest::MD5::md5_hex($email) . "?s=";
1900         return $avatar_cache{$email} . $size;
1901 }
1902
1903 # Insert an avatar for the given $email at the given $size if the feature
1904 # is enabled.
1905 sub git_get_avatar {
1906         my ($email, %opts) = @_;
1907         my $pre_white  = ($opts{-pad_before} ? "&nbsp;" : "");
1908         my $post_white = ($opts{-pad_after}  ? "&nbsp;" : "");
1909         $opts{-size} ||= 'default';
1910         my $size = $avatar_size{$opts{-size}} || $avatar_size{'default'};
1911         my $url = "";
1912         if ($git_avatar eq 'gravatar') {
1913                 $url = gravatar_url($email, $size);
1914         } elsif ($git_avatar eq 'picon') {
1915                 $url = picon_url($email);
1916         }
1917         # Other providers can be added by extending the if chain, defining $url
1918         # as needed. If no variant puts something in $url, we assume avatars
1919         # are completely disabled/unavailable.
1920         if ($url) {
1921                 return $pre_white .
1922                        "<img width=\"$size\" " .
1923                             "class=\"avatar\" " .
1924                             "src=\"".esc_url($url)."\" " .
1925                             "alt=\"\" " .
1926                        "/>" . $post_white;
1927         } else {
1928                 return "";
1929         }
1930 }
1931
1932 sub format_search_author {
1933         my ($author, $searchtype, $displaytext) = @_;
1934         my $have_search = gitweb_check_feature('search');
1935
1936         if ($have_search) {
1937                 my $performed = "";
1938                 if ($searchtype eq 'author') {
1939                         $performed = "authored";
1940                 } elsif ($searchtype eq 'committer') {
1941                         $performed = "committed";
1942                 }
1943
1944                 return $cgi->a({-href => href(action=>"search", hash=>$hash,
1945                                 searchtext=>$author,
1946                                 searchtype=>$searchtype), class=>"list",
1947                                 title=>"Search for commits $performed by $author"},
1948                                 $displaytext);
1949
1950         } else {
1951                 return $displaytext;
1952         }
1953 }
1954
1955 # format the author name of the given commit with the given tag
1956 # the author name is chopped and escaped according to the other
1957 # optional parameters (see chop_str).
1958 sub format_author_html {
1959         my $tag = shift;
1960         my $co = shift;
1961         my $author = chop_and_escape_str($co->{'author_name'}, @_);
1962         return "<$tag class=\"author\">" .
1963                format_search_author($co->{'author_name'}, "author",
1964                        git_get_avatar($co->{'author_email'}, -pad_after => 1) .
1965                        $author) .
1966                "</$tag>";
1967 }
1968
1969 # format git diff header line, i.e. "diff --(git|combined|cc) ..."
1970 sub format_git_diff_header_line {
1971         my $line = shift;
1972         my $diffinfo = shift;
1973         my ($from, $to) = @_;
1974
1975         if ($diffinfo->{'nparents'}) {
1976                 # combined diff
1977                 $line =~ s!^(diff (.*?) )"?.*$!$1!;
1978                 if ($to->{'href'}) {
1979                         $line .= $cgi->a({-href => $to->{'href'}, -class => "path"},
1980                                          esc_path($to->{'file'}));
1981                 } else { # file was deleted (no href)
1982                         $line .= esc_path($to->{'file'});
1983                 }
1984         } else {
1985                 # "ordinary" diff
1986                 $line =~ s!^(diff (.*?) )"?a/.*$!$1!;
1987                 if ($from->{'href'}) {
1988                         $line .= $cgi->a({-href => $from->{'href'}, -class => "path"},
1989                                          'a/' . esc_path($from->{'file'}));
1990                 } else { # file was added (no href)
1991                         $line .= 'a/' . esc_path($from->{'file'});
1992                 }
1993                 $line .= ' ';
1994                 if ($to->{'href'}) {
1995                         $line .= $cgi->a({-href => $to->{'href'}, -class => "path"},
1996                                          'b/' . esc_path($to->{'file'}));
1997                 } else { # file was deleted
1998                         $line .= 'b/' . esc_path($to->{'file'});
1999                 }
2000         }
2001
2002         return "<div class=\"diff header\">$line</div>\n";
2003 }
2004
2005 # format extended diff header line, before patch itself
2006 sub format_extended_diff_header_line {
2007         my $line = shift;
2008         my $diffinfo = shift;
2009         my ($from, $to) = @_;
2010
2011         # match <path>
2012         if ($line =~ s!^((copy|rename) from ).*$!$1! && $from->{'href'}) {
2013                 $line .= $cgi->a({-href=>$from->{'href'}, -class=>"path"},
2014                                        esc_path($from->{'file'}));
2015         }
2016         if ($line =~ s!^((copy|rename) to ).*$!$1! && $to->{'href'}) {
2017                 $line .= $cgi->a({-href=>$to->{'href'}, -class=>"path"},
2018                                  esc_path($to->{'file'}));
2019         }
2020         # match single <mode>
2021         if ($line =~ m/\s(\d{6})$/) {
2022                 $line .= '<span class="info"> (' .
2023                          file_type_long($1) .
2024                          ')</span>';
2025         }
2026         # match <hash>
2027         if ($line =~ m/^index [0-9a-fA-F]{40},[0-9a-fA-F]{40}/) {
2028                 # can match only for combined diff
2029                 $line = 'index ';
2030                 for (my $i = 0; $i < $diffinfo->{'nparents'}; $i++) {
2031                         if ($from->{'href'}[$i]) {
2032                                 $line .= $cgi->a({-href=>$from->{'href'}[$i],
2033                                                   -class=>"hash"},
2034                                                  substr($diffinfo->{'from_id'}[$i],0,7));
2035                         } else {
2036                                 $line .= '0' x 7;
2037                         }
2038                         # separator
2039                         $line .= ',' if ($i < $diffinfo->{'nparents'} - 1);
2040                 }
2041                 $line .= '..';
2042                 if ($to->{'href'}) {
2043                         $line .= $cgi->a({-href=>$to->{'href'}, -class=>"hash"},
2044                                          substr($diffinfo->{'to_id'},0,7));
2045                 } else {
2046                         $line .= '0' x 7;
2047                 }
2048
2049         } elsif ($line =~ m/^index [0-9a-fA-F]{40}..[0-9a-fA-F]{40}/) {
2050                 # can match only for ordinary diff
2051                 my ($from_link, $to_link);
2052                 if ($from->{'href'}) {
2053                         $from_link = $cgi->a({-href=>$from->{'href'}, -class=>"hash"},
2054                                              substr($diffinfo->{'from_id'},0,7));
2055                 } else {
2056                         $from_link = '0' x 7;
2057                 }
2058                 if ($to->{'href'}) {
2059                         $to_link = $cgi->a({-href=>$to->{'href'}, -class=>"hash"},
2060                                            substr($diffinfo->{'to_id'},0,7));
2061                 } else {
2062                         $to_link = '0' x 7;
2063                 }
2064                 my ($from_id, $to_id) = ($diffinfo->{'from_id'}, $diffinfo->{'to_id'});
2065                 $line =~ s!$from_id\.\.$to_id!$from_link..$to_link!;
2066         }
2067
2068         return $line . "<br/>\n";
2069 }
2070
2071 # format from-file/to-file diff header
2072 sub format_diff_from_to_header {
2073         my ($from_line, $to_line, $diffinfo, $from, $to, @parents) = @_;
2074         my $line;
2075         my $result = '';
2076
2077         $line = $from_line;
2078         #assert($line =~ m/^---/) if DEBUG;
2079         # no extra formatting for "^--- /dev/null"
2080         if (! $diffinfo->{'nparents'}) {
2081                 # ordinary (single parent) diff
2082                 if ($line =~ m!^--- "?a/!) {
2083                         if ($from->{'href'}) {
2084                                 $line = '--- a/' .
2085                                         $cgi->a({-href=>$from->{'href'}, -class=>"path"},
2086                                                 esc_path($from->{'file'}));
2087                         } else {
2088                                 $line = '--- a/' .
2089                                         esc_path($from->{'file'});
2090                         }
2091                 }
2092                 $result .= qq!<div class="diff from_file">$line</div>\n!;
2093
2094         } else {
2095                 # combined diff (merge commit)
2096                 for (my $i = 0; $i < $diffinfo->{'nparents'}; $i++) {
2097                         if ($from->{'href'}[$i]) {
2098                                 $line = '--- ' .
2099                                         $cgi->a({-href=>href(action=>"blobdiff",
2100                                                              hash_parent=>$diffinfo->{'from_id'}[$i],
2101                                                              hash_parent_base=>$parents[$i],
2102                                                              file_parent=>$from->{'file'}[$i],
2103                                                              hash=>$diffinfo->{'to_id'},
2104                                                              hash_base=>$hash,
2105                                                              file_name=>$to->{'file'}),
2106                                                  -class=>"path",
2107                                                  -title=>"diff" . ($i+1)},
2108                                                 $i+1) .
2109                                         '/' .
2110                                         $cgi->a({-href=>$from->{'href'}[$i], -class=>"path"},
2111                                                 esc_path($from->{'file'}[$i]));
2112                         } else {
2113                                 $line = '--- /dev/null';
2114                         }
2115                         $result .= qq!<div class="diff from_file">$line</div>\n!;
2116                 }
2117         }
2118
2119         $line = $to_line;
2120         #assert($line =~ m/^\+\+\+/) if DEBUG;
2121         # no extra formatting for "^+++ /dev/null"
2122         if ($line =~ m!^\+\+\+ "?b/!) {
2123                 if ($to->{'href'}) {
2124                         $line = '+++ b/' .
2125                                 $cgi->a({-href=>$to->{'href'}, -class=>"path"},
2126                                         esc_path($to->{'file'}));
2127                 } else {
2128                         $line = '+++ b/' .
2129                                 esc_path($to->{'file'});
2130                 }
2131         }
2132         $result .= qq!<div class="diff to_file">$line</div>\n!;
2133
2134         return $result;
2135 }
2136
2137 # create note for patch simplified by combined diff
2138 sub format_diff_cc_simplified {
2139         my ($diffinfo, @parents) = @_;
2140         my $result = '';
2141
2142         $result .= "<div class=\"diff header\">" .
2143                    "diff --cc ";
2144         if (!is_deleted($diffinfo)) {
2145                 $result .= $cgi->a({-href => href(action=>"blob",
2146                                                   hash_base=>$hash,
2147                                                   hash=>$diffinfo->{'to_id'},
2148                                                   file_name=>$diffinfo->{'to_file'}),
2149                                     -class => "path"},
2150                                    esc_path($diffinfo->{'to_file'}));
2151         } else {
2152                 $result .= esc_path($diffinfo->{'to_file'});
2153         }
2154         $result .= "</div>\n" . # class="diff header"
2155                    "<div class=\"diff nodifferences\">" .
2156                    "Simple merge" .
2157                    "</div>\n"; # class="diff nodifferences"
2158
2159         return $result;
2160 }
2161
2162 # format patch (diff) line (not to be used for diff headers)
2163 sub format_diff_line {
2164         my $line = shift;
2165         my ($from, $to) = @_;
2166         my $diff_class = "";
2167
2168         chomp $line;
2169
2170         if ($from && $to && ref($from->{'href'}) eq "ARRAY") {
2171                 # combined diff
2172                 my $prefix = substr($line, 0, scalar @{$from->{'href'}});
2173                 if ($line =~ m/^\@{3}/) {
2174                         $diff_class = " chunk_header";
2175                 } elsif ($line =~ m/^\\/) {
2176                         $diff_class = " incomplete";
2177                 } elsif ($prefix =~ tr/+/+/) {
2178                         $diff_class = " add";
2179                 } elsif ($prefix =~ tr/-/-/) {
2180                         $diff_class = " rem";
2181                 }
2182         } else {
2183                 # assume ordinary diff
2184                 my $char = substr($line, 0, 1);
2185                 if ($char eq '+') {
2186                         $diff_class = " add";
2187                 } elsif ($char eq '-') {
2188                         $diff_class = " rem";
2189                 } elsif ($char eq '@') {
2190                         $diff_class = " chunk_header";
2191                 } elsif ($char eq "\\") {
2192                         $diff_class = " incomplete";
2193                 }
2194         }
2195         $line = untabify($line);
2196         if ($from && $to && $line =~ m/^\@{2} /) {
2197                 my ($from_text, $from_start, $from_lines, $to_text, $to_start, $to_lines, $section) =
2198                         $line =~ m/^\@{2} (-(\d+)(?:,(\d+))?) (\+(\d+)(?:,(\d+))?) \@{2}(.*)$/;
2199
2200                 $from_lines = 0 unless defined $from_lines;
2201                 $to_lines   = 0 unless defined $to_lines;
2202
2203                 if ($from->{'href'}) {
2204                         $from_text = $cgi->a({-href=>"$from->{'href'}#l$from_start",
2205                                              -class=>"list"}, $from_text);
2206                 }
2207                 if ($to->{'href'}) {
2208                         $to_text   = $cgi->a({-href=>"$to->{'href'}#l$to_start",
2209                                              -class=>"list"}, $to_text);
2210                 }
2211                 $line = "<span class=\"chunk_info\">@@ $from_text $to_text @@</span>" .
2212                         "<span class=\"section\">" . esc_html($section, -nbsp=>1) . "</span>";
2213                 return "<div class=\"diff$diff_class\">$line</div>\n";
2214         } elsif ($from && $to && $line =~ m/^\@{3}/) {
2215                 my ($prefix, $ranges, $section) = $line =~ m/^(\@+) (.*?) \@+(.*)$/;
2216                 my (@from_text, @from_start, @from_nlines, $to_text, $to_start, $to_nlines);
2217
2218                 @from_text = split(' ', $ranges);
2219                 for (my $i = 0; $i < @from_text; ++$i) {
2220                         ($from_start[$i], $from_nlines[$i]) =
2221                                 (split(',', substr($from_text[$i], 1)), 0);
2222                 }
2223
2224                 $to_text   = pop @from_text;
2225                 $to_start  = pop @from_start;
2226                 $to_nlines = pop @from_nlines;
2227
2228                 $line = "<span class=\"chunk_info\">$prefix ";
2229                 for (my $i = 0; $i < @from_text; ++$i) {
2230                         if ($from->{'href'}[$i]) {
2231                                 $line .= $cgi->a({-href=>"$from->{'href'}[$i]#l$from_start[$i]",
2232                                                   -class=>"list"}, $from_text[$i]);
2233                         } else {
2234                                 $line .= $from_text[$i];
2235                         }
2236                         $line .= " ";
2237                 }
2238                 if ($to->{'href'}) {
2239                         $line .= $cgi->a({-href=>"$to->{'href'}#l$to_start",
2240                                           -class=>"list"}, $to_text);
2241                 } else {
2242                         $line .= $to_text;
2243                 }
2244                 $line .= " $prefix</span>" .
2245                          "<span class=\"section\">" . esc_html($section, -nbsp=>1) . "</span>";
2246                 return "<div class=\"diff$diff_class\">$line</div>\n";
2247         }
2248         return "<div class=\"diff$diff_class\">" . esc_html($line, -nbsp=>1) . "</div>\n";
2249 }
2250
2251 # Generates undef or something like "_snapshot_" or "snapshot (_tbz2_ _zip_)",
2252 # linked.  Pass the hash of the tree/commit to snapshot.
2253 sub format_snapshot_links {
2254         my ($hash) = @_;
2255         my $num_fmts = @snapshot_fmts;
2256         if ($num_fmts > 1) {
2257                 # A parenthesized list of links bearing format names.
2258                 # e.g. "snapshot (_tar.gz_ _zip_)"
2259                 return "snapshot (" . join(' ', map
2260                         $cgi->a({
2261                                 -href => href(
2262                                         action=>"snapshot",
2263                                         hash=>$hash,
2264                                         snapshot_format=>$_
2265                                 )
2266                         }, $known_snapshot_formats{$_}{'display'})
2267                 , @snapshot_fmts) . ")";
2268         } elsif ($num_fmts == 1) {
2269                 # A single "snapshot" link whose tooltip bears the format name.
2270                 # i.e. "_snapshot_"
2271                 my ($fmt) = @snapshot_fmts;
2272                 return
2273                         $cgi->a({
2274                                 -href => href(
2275                                         action=>"snapshot",
2276                                         hash=>$hash,
2277                                         snapshot_format=>$fmt
2278                                 ),
2279                                 -title => "in format: $known_snapshot_formats{$fmt}{'display'}"
2280                         }, "snapshot");
2281         } else { # $num_fmts == 0
2282                 return undef;
2283         }
2284 }
2285
2286 ## ......................................................................
2287 ## functions returning values to be passed, perhaps after some
2288 ## transformation, to other functions; e.g. returning arguments to href()
2289
2290 # returns hash to be passed to href to generate gitweb URL
2291 # in -title key it returns description of link
2292 sub get_feed_info {
2293         my $format = shift || 'Atom';
2294         my %res = (action => lc($format));
2295
2296         # feed links are possible only for project views
2297         return unless (defined $project);
2298         # some views should link to OPML, or to generic project feed,
2299         # or don't have specific feed yet (so they should use generic)
2300         return if ($action =~ /^(?:tags|heads|forks|tag|search)$/x);
2301
2302         my $branch;
2303         # branches refs uses 'refs/heads/' prefix (fullname) to differentiate
2304         # from tag links; this also makes possible to detect branch links
2305         if ((defined $hash_base && $hash_base =~ m!^refs/heads/(.*)$!) ||
2306             (defined $hash      && $hash      =~ m!^refs/heads/(.*)$!)) {
2307                 $branch = $1;
2308         }
2309         # find log type for feed description (title)
2310         my $type = 'log';
2311         if (defined $file_name) {
2312                 $type  = "history of $file_name";
2313                 $type .= "/" if ($action eq 'tree');
2314                 $type .= " on '$branch'" if (defined $branch);
2315         } else {
2316                 $type = "log of $branch" if (defined $branch);
2317         }
2318
2319         $res{-title} = $type;
2320         $res{'hash'} = (defined $branch ? "refs/heads/$branch" : undef);
2321         $res{'file_name'} = $file_name;
2322
2323         return %res;
2324 }
2325
2326 ## ----------------------------------------------------------------------
2327 ## git utility subroutines, invoking git commands
2328
2329 # returns path to the core git executable and the --git-dir parameter as list
2330 sub git_cmd {
2331         $number_of_git_cmds++;
2332         return $GIT, '--git-dir='.$git_dir;
2333 }
2334
2335 # quote the given arguments for passing them to the shell
2336 # quote_command("command", "arg 1", "arg with ' and ! characters")
2337 # => "'command' 'arg 1' 'arg with '\'' and '\!' characters'"
2338 # Try to avoid using this function wherever possible.
2339 sub quote_command {
2340         return join(' ',
2341                 map { my $a = $_; $a =~ s/(['!])/'\\$1'/g; "'$a'" } @_ );
2342 }
2343
2344 # get HEAD ref of given project as hash
2345 sub git_get_head_hash {
2346         return git_get_full_hash(shift, 'HEAD');
2347 }
2348
2349 sub git_get_full_hash {
2350         return git_get_hash(@_);
2351 }
2352
2353 sub git_get_short_hash {
2354         return git_get_hash(@_, '--short=7');
2355 }
2356
2357 sub git_get_hash {
2358         my ($project, $hash, @options) = @_;
2359         my $o_git_dir = $git_dir;
2360         my $retval = undef;
2361         $git_dir = "$projectroot/$project";
2362         if (open my $fd, '-|', git_cmd(), 'rev-parse',
2363             '--verify', '-q', @options, $hash) {
2364                 $retval = <$fd>;
2365                 chomp $retval if defined $retval;
2366                 close $fd;
2367         }
2368         if (defined $o_git_dir) {
2369                 $git_dir = $o_git_dir;
2370         }
2371         return $retval;
2372 }
2373
2374 # get type of given object
2375 sub git_get_type {
2376         my $hash = shift;
2377
2378         open my $fd, "-|", git_cmd(), "cat-file", '-t', $hash or return;
2379         my $type = <$fd>;
2380         close $fd or return;
2381         chomp $type;
2382         return $type;
2383 }
2384
2385 # repository configuration
2386 our $config_file = '';
2387 our %config;
2388
2389 # store multiple values for single key as anonymous array reference
2390 # single values stored directly in the hash, not as [ <value> ]
2391 sub hash_set_multi {
2392         my ($hash, $key, $value) = @_;
2393
2394         if (!exists $hash->{$key}) {
2395                 $hash->{$key} = $value;
2396         } elsif (!ref $hash->{$key}) {
2397                 $hash->{$key} = [ $hash->{$key}, $value ];
2398         } else {
2399                 push @{$hash->{$key}}, $value;
2400         }
2401 }
2402
2403 # return hash of git project configuration
2404 # optionally limited to some section, e.g. 'gitweb'
2405 sub git_parse_project_config {
2406         my $section_regexp = shift;
2407         my %config;
2408
2409         local $/ = "\0";
2410
2411         open my $fh, "-|", git_cmd(), "config", '-z', '-l',
2412                 or return;
2413
2414         while (my $keyval = <$fh>) {
2415                 chomp $keyval;
2416                 my ($key, $value) = split(/\n/, $keyval, 2);
2417
2418                 hash_set_multi(\%config, $key, $value)
2419                         if (!defined $section_regexp || $key =~ /^(?:$section_regexp)\./o);
2420         }
2421         close $fh;
2422
2423         return %config;
2424 }
2425
2426 # convert config value to boolean: 'true' or 'false'
2427 # no value, number > 0, 'true' and 'yes' values are true
2428 # rest of values are treated as false (never as error)
2429 sub config_to_bool {
2430         my $val = shift;
2431
2432         return 1 if !defined $val;             # section.key
2433
2434         # strip leading and trailing whitespace
2435         $val =~ s/^\s+//;
2436         $val =~ s/\s+$//;
2437
2438         return (($val =~ /^\d+$/ && $val) ||   # section.key = 1
2439                 ($val =~ /^(?:true|yes)$/i));  # section.key = true
2440 }
2441
2442 # convert config value to simple decimal number
2443 # an optional value suffix of 'k', 'm', or 'g' will cause the value
2444 # to be multiplied by 1024, 1048576, or 1073741824
2445 sub config_to_int {
2446         my $val = shift;
2447
2448         # strip leading and trailing whitespace
2449         $val =~ s/^\s+//;
2450         $val =~ s/\s+$//;
2451
2452         if (my ($num, $unit) = ($val =~ /^([0-9]*)([kmg])$/i)) {
2453                 $unit = lc($unit);
2454                 # unknown unit is treated as 1
2455                 return $num * ($unit eq 'g' ? 1073741824 :
2456                                $unit eq 'm' ?    1048576 :
2457                                $unit eq 'k' ?       1024 : 1);
2458         }
2459         return $val;
2460 }
2461
2462 # convert config value to array reference, if needed
2463 sub config_to_multi {
2464         my $val = shift;
2465
2466         return ref($val) ? $val : (defined($val) ? [ $val ] : []);
2467 }
2468
2469 sub git_get_project_config {
2470         my ($key, $type) = @_;
2471
2472         return unless defined $git_dir;
2473
2474         # key sanity check
2475         return unless ($key);
2476         $key =~ s/^gitweb\.//;
2477         return if ($key =~ m/\W/);
2478
2479         # type sanity check
2480         if (defined $type) {
2481                 $type =~ s/^--//;
2482                 $type = undef
2483                         unless ($type eq 'bool' || $type eq 'int');
2484         }
2485
2486         # get config
2487         if (!defined $config_file ||
2488             $config_file ne "$git_dir/config") {
2489                 %config = git_parse_project_config('gitweb');
2490                 $config_file = "$git_dir/config";
2491         }
2492
2493         # check if config variable (key) exists
2494         return unless exists $config{"gitweb.$key"};
2495
2496         # ensure given type
2497         if (!defined $type) {
2498                 return $config{"gitweb.$key"};
2499         } elsif ($type eq 'bool') {
2500                 # backward compatibility: 'git config --bool' returns true/false
2501                 return config_to_bool($config{"gitweb.$key"}) ? 'true' : 'false';
2502         } elsif ($type eq 'int') {
2503                 return config_to_int($config{"gitweb.$key"});
2504         }
2505         return $config{"gitweb.$key"};
2506 }
2507
2508 # get hash of given path at given ref
2509 sub git_get_hash_by_path {
2510         my $base = shift;
2511         my $path = shift || return undef;
2512         my $type = shift;
2513
2514         $path =~ s,/+$,,;
2515
2516         open my $fd, "-|", git_cmd(), "ls-tree", $base, "--", $path
2517                 or die_error(500, "Open git-ls-tree failed");
2518         my $line = <$fd>;
2519         close $fd or return undef;
2520
2521         if (!defined $line) {
2522                 # there is no tree or hash given by $path at $base
2523                 return undef;
2524         }
2525
2526         #'100644 blob 0fa3f3a66fb6a137f6ec2c19351ed4d807070ffa  panic.c'
2527         $line =~ m/^([0-9]+) (.+) ([0-9a-fA-F]{40})\t/;
2528         if (defined $type && $type ne $2) {
2529                 # type doesn't match
2530                 return undef;
2531         }
2532         return $3;
2533 }
2534
2535 # get path of entry with given hash at given tree-ish (ref)
2536 # used to get 'from' filename for combined diff (merge commit) for renames
2537 sub git_get_path_by_hash {
2538         my $base = shift || return;
2539         my $hash = shift || return;
2540
2541         local $/ = "\0";
2542
2543         open my $fd, "-|", git_cmd(), "ls-tree", '-r', '-t', '-z', $base
2544                 or return undef;
2545         while (my $line = <$fd>) {
2546                 chomp $line;
2547
2548                 #'040000 tree 595596a6a9117ddba9fe379b6b012b558bac8423  gitweb'
2549                 #'100644 blob e02e90f0429be0d2a69b76571101f20b8f75530f  gitweb/README'
2550                 if ($line =~ m/(?:[0-9]+) (?:.+) $hash\t(.+)$/) {
2551                         close $fd;
2552                         return $1;
2553                 }
2554         }
2555         close $fd;
2556         return undef;
2557 }
2558
2559 ## ......................................................................
2560 ## git utility functions, directly accessing git repository
2561
2562 sub git_get_project_description {
2563         my $path = shift;
2564
2565         $git_dir = "$projectroot/$path";
2566         open my $fd, '<', "$git_dir/description"
2567                 or return git_get_project_config('description');
2568         my $descr = <$fd>;
2569         close $fd;
2570         if (defined $descr) {
2571                 chomp $descr;
2572         }
2573         return $descr;
2574 }
2575
2576 sub git_get_project_ctags {
2577         my $path = shift;
2578         my $ctags = {};
2579
2580         $git_dir = "$projectroot/$path";
2581         opendir my $dh, "$git_dir/ctags"
2582                 or return $ctags;
2583         foreach (grep { -f $_ } map { "$git_dir/ctags/$_" } readdir($dh)) {
2584                 open my $ct, '<', $_ or next;
2585                 my $val = <$ct>;
2586                 chomp $val;
2587                 close $ct;
2588                 my $ctag = $_; $ctag =~ s#.*/##;
2589                 $ctags->{$ctag} = $val;
2590         }
2591         closedir $dh;
2592         $ctags;
2593 }
2594
2595 sub git_populate_project_tagcloud {
2596         my $ctags = shift;
2597
2598         # First, merge different-cased tags; tags vote on casing
2599         my %ctags_lc;
2600         foreach (keys %$ctags) {
2601                 $ctags_lc{lc $_}->{count} += $ctags->{$_};
2602                 if (not $ctags_lc{lc $_}->{topcount}
2603                     or $ctags_lc{lc $_}->{topcount} < $ctags->{$_}) {
2604                         $ctags_lc{lc $_}->{topcount} = $ctags->{$_};
2605                         $ctags_lc{lc $_}->{topname} = $_;
2606                 }
2607         }
2608
2609         my $cloud;
2610         if (eval { require HTML::TagCloud; 1; }) {
2611                 $cloud = HTML::TagCloud->new;
2612                 foreach (sort keys %ctags_lc) {
2613                         # Pad the title with spaces so that the cloud looks
2614                         # less crammed.
2615                         my $title = $ctags_lc{$_}->{topname};
2616                         $title =~ s/ /&nbsp;/g;
2617                         $title =~ s/^/&nbsp;/g;
2618                         $title =~ s/$/&nbsp;/g;
2619                         $cloud->add($title, $home_link."?by_tag=".$_, $ctags_lc{$_}->{count});
2620                 }
2621         } else {
2622                 $cloud = \%ctags_lc;
2623         }
2624         $cloud;
2625 }
2626
2627 sub git_show_project_tagcloud {
2628         my ($cloud, $count) = @_;
2629         print STDERR ref($cloud)."..\n";
2630         if (ref $cloud eq 'HTML::TagCloud') {
2631                 return $cloud->html_and_css($count);
2632         } else {
2633                 my @tags = sort { $cloud->{$a}->{count} <=> $cloud->{$b}->{count} } keys %$cloud;
2634                 return '<p align="center">' . join (', ', map {
2635                         $cgi->a({-href=>"$home_link?by_tag=$_"}, $cloud->{$_}->{topname})
2636                 } splice(@tags, 0, $count)) . '</p>';
2637         }
2638 }
2639
2640 sub git_get_project_url_list {
2641         my $path = shift;
2642
2643         $git_dir = "$projectroot/$path";
2644         open my $fd, '<', "$git_dir/cloneurl"
2645                 or return wantarray ?
2646                 @{ config_to_multi(git_get_project_config('url')) } :
2647                    config_to_multi(git_get_project_config('url'));
2648         my @git_project_url_list = map { chomp; $_ } <$fd>;
2649         close $fd;
2650
2651         return wantarray ? @git_project_url_list : \@git_project_url_list;
2652 }
2653
2654 sub git_get_projects_list {
2655         my ($filter) = @_;
2656         my @list;
2657
2658         $filter ||= '';
2659         $filter =~ s/\.git$//;
2660
2661         my $check_forks = gitweb_check_feature('forks');
2662
2663         if (-d $projects_list) {
2664                 # search in directory
2665                 my $dir = $projects_list . ($filter ? "/$filter" : '');
2666                 # remove the trailing "/"
2667                 $dir =~ s!/+$!!;
2668                 my $pfxlen = length("$dir");
2669                 my $pfxdepth = ($dir =~ tr!/!!);
2670
2671                 File::Find::find({
2672                         follow_fast => 1, # follow symbolic links
2673                         follow_skip => 2, # ignore duplicates
2674                         dangling_symlinks => 0, # ignore dangling symlinks, silently
2675                         wanted => sub {
2676                                 # global variables
2677                                 our $project_maxdepth;
2678                                 our $projectroot;
2679                                 # skip project-list toplevel, if we get it.
2680                                 return if (m!^[/.]$!);
2681                                 # only directories can be git repositories
2682                                 return unless (-d $_);
2683                                 # don't traverse too deep (Find is super slow on os x)
2684                                 if (($File::Find::name =~ tr!/!!) - $pfxdepth > $project_maxdepth) {
2685                                         $File::Find::prune = 1;
2686                                         return;
2687                                 }
2688
2689                                 my $subdir = substr($File::Find::name, $pfxlen + 1);
2690                                 # we check related file in $projectroot
2691                                 my $path = ($filter ? "$filter/" : '') . $subdir;
2692                                 if (check_export_ok("$projectroot/$path")) {
2693                                         push @list, { path => $path };
2694                                         $File::Find::prune = 1;
2695                                 }
2696                         },
2697                 }, "$dir");
2698
2699         } elsif (-f $projects_list) {
2700                 # read from file(url-encoded):
2701                 # 'git%2Fgit.git Linus+Torvalds'
2702                 # 'libs%2Fklibc%2Fklibc.git H.+Peter+Anvin'
2703                 # 'linux%2Fhotplug%2Fudev.git Greg+Kroah-Hartman'
2704                 my %paths;
2705                 open my $fd, '<', $projects_list or return;
2706         PROJECT:
2707                 while (my $line = <$fd>) {
2708                         chomp $line;
2709                         my ($path, $owner) = split ' ', $line;
2710                         $path = unescape($path);
2711                         $owner = unescape($owner);
2712                         if (!defined $path) {
2713                                 next;
2714                         }
2715                         if ($filter ne '') {
2716                                 # looking for forks;
2717                                 my $pfx = substr($path, 0, length($filter));
2718                                 if ($pfx ne $filter) {
2719                                         next PROJECT;
2720                                 }
2721                                 my $sfx = substr($path, length($filter));
2722                                 if ($sfx !~ /^\/.*\.git$/) {
2723                                         next PROJECT;
2724                                 }
2725                         } elsif ($check_forks) {
2726                         PATH:
2727                                 foreach my $filter (keys %paths) {
2728                                         # looking for forks;
2729                                         my $pfx = substr($path, 0, length($filter));
2730                                         if ($pfx ne $filter) {
2731                                                 next PATH;
2732                                         }
2733                                         my $sfx = substr($path, length($filter));
2734                                         if ($sfx !~ /^\/.*\.git$/) {
2735                                                 next PATH;
2736                                         }
2737                                         # is a fork, don't include it in
2738                                         # the list
2739                                         next PROJECT;
2740                                 }
2741                         }
2742                         if (check_export_ok("$projectroot/$path")) {
2743                                 my $pr = {
2744                                         path => $path,
2745                                         owner => to_utf8($owner),
2746                                 };
2747                                 push @list, $pr;
2748                                 (my $forks_path = $path) =~ s/\.git$//;
2749                                 $paths{$forks_path}++;
2750                         }
2751                 }
2752                 close $fd;
2753         }
2754         return @list;
2755 }
2756
2757 our $gitweb_project_owner = undef;
2758 sub git_get_project_list_from_file {
2759
2760         return if (defined $gitweb_project_owner);
2761
2762         $gitweb_project_owner = {};
2763         # read from file (url-encoded):
2764         # 'git%2Fgit.git Linus+Torvalds'
2765         # 'libs%2Fklibc%2Fklibc.git H.+Peter+Anvin'
2766         # 'linux%2Fhotplug%2Fudev.git Greg+Kroah-Hartman'
2767         if (-f $projects_list) {
2768                 open(my $fd, '<', $projects_list);
2769                 while (my $line = <$fd>) {
2770                         chomp $line;
2771                         my ($pr, $ow) = split ' ', $line;
2772                         $pr = unescape($pr);
2773                         $ow = unescape($ow);
2774                         $gitweb_project_owner->{$pr} = to_utf8($ow);
2775                 }
2776                 close $fd;
2777         }
2778 }
2779
2780 sub git_get_project_owner {
2781         my $project = shift;
2782         my $owner;
2783
2784         return undef unless $project;
2785         $git_dir = "$projectroot/$project";
2786
2787         if (!defined $gitweb_project_owner) {
2788                 git_get_project_list_from_file();
2789         }
2790
2791         if (exists $gitweb_project_owner->{$project}) {
2792                 $owner = $gitweb_project_owner->{$project};
2793         }
2794         if (!defined $owner){
2795                 $owner = git_get_project_config('owner');
2796         }
2797         if (!defined $owner) {
2798                 $owner = get_file_owner("$git_dir");
2799         }
2800
2801         return $owner;
2802 }
2803
2804 sub git_get_last_activity {
2805         my ($path) = @_;
2806         my $fd;
2807
2808         $git_dir = "$projectroot/$path";
2809         open($fd, "-|", git_cmd(), 'for-each-ref',
2810              '--format=%(committer)',
2811              '--sort=-committerdate',
2812              '--count=1',
2813              'refs/heads') or return;
2814         my $most_recent = <$fd>;
2815         close $fd or return;
2816         if (defined $most_recent &&
2817             $most_recent =~ / (\d+) [-+][01]\d\d\d$/) {
2818                 my $timestamp = $1;
2819                 my $age = time - $timestamp;
2820                 return ($age, age_string($age));
2821         }
2822         return (undef, undef);
2823 }
2824
2825 # Implementation note: when a single remote is wanted, we cannot use 'git
2826 # remote show -n' because that command always work (assuming it's a remote URL
2827 # if it's not defined), and we cannot use 'git remote show' because that would
2828 # try to make a network roundtrip. So the only way to find if that particular
2829 # remote is defined is to walk the list provided by 'git remote -v' and stop if
2830 # and when we find what we want.
2831 sub git_get_remotes_list {
2832         my $wanted = shift;
2833         my %remotes = ();
2834
2835         open my $fd, '-|' , git_cmd(), 'remote', '-v';
2836         return unless $fd;
2837         while (my $remote = <$fd>) {
2838                 chomp $remote;
2839                 $remote =~ s!\t(.*?)\s+\((\w+)\)$!!;
2840                 next if $wanted and not $remote eq $wanted;
2841                 my ($url, $key) = ($1, $2);
2842
2843                 $remotes{$remote} ||= { 'heads' => () };
2844                 $remotes{$remote}{$key} = $url;
2845         }
2846         close $fd or return;
2847         return wantarray ? %remotes : \%remotes;
2848 }
2849
2850 # Takes a hash of remotes as first parameter and fills it by adding the
2851 # available remote heads for each of the indicated remotes.
2852 sub fill_remote_heads {
2853         my $remotes = shift;
2854         my @heads = map { "remotes/$_" } keys %$remotes;
2855         my @remoteheads = git_get_heads_list(undef, @heads);
2856         foreach my $remote (keys %$remotes) {
2857                 $remotes->{$remote}{'heads'} = [ grep {
2858                         $_->{'name'} =~ s!^$remote/!!
2859                         } @remoteheads ];
2860         }
2861 }
2862
2863 sub git_get_references {
2864         my $type = shift || "";
2865         my %refs;
2866         # 5dc01c595e6c6ec9ccda4f6f69c131c0dd945f8c refs/tags/v2.6.11
2867         # c39ae07f393806ccf406ef966e9a15afc43cc36a refs/tags/v2.6.11^{}
2868         open my $fd, "-|", git_cmd(), "show-ref", "--dereference",
2869                 ($type ? ("--", "refs/$type") : ()) # use -- <pattern> if $type
2870                 or return;
2871
2872         while (my $line = <$fd>) {
2873                 chomp $line;
2874                 if ($line =~ m!^([0-9a-fA-F]{40})\srefs/($type.*)$!) {
2875                         if (defined $refs{$1}) {
2876                                 push @{$refs{$1}}, $2;
2877                         } else {
2878                                 $refs{$1} = [ $2 ];
2879                         }
2880                 }
2881         }
2882         close $fd or return;
2883         return \%refs;
2884 }
2885
2886 sub git_get_rev_name_tags {
2887         my $hash = shift || return undef;
2888
2889         open my $fd, "-|", git_cmd(), "name-rev", "--tags", $hash
2890                 or return;
2891         my $name_rev = <$fd>;
2892         close $fd;
2893
2894         if ($name_rev =~ m|^$hash tags/(.*)$|) {
2895                 return $1;
2896         } else {
2897                 # catches also '$hash undefined' output
2898                 return undef;
2899         }
2900 }
2901
2902 ## ----------------------------------------------------------------------
2903 ## parse to hash functions
2904
2905 sub parse_date {
2906         my $epoch = shift;
2907         my $tz = shift || "-0000";
2908
2909         my %date;
2910         my @months = ("Jan", "Feb", "Mar", "Apr", "May", "Jun", "Jul", "Aug", "Sep", "Oct", "Nov", "Dec");
2911         my @days = ("Sun", "Mon", "Tue", "Wed", "Thu", "Fri", "Sat");
2912         my ($sec, $min, $hour, $mday, $mon, $year, $wday, $yday) = gmtime($epoch);
2913         $date{'hour'} = $hour;
2914         $date{'minute'} = $min;
2915         $date{'mday'} = $mday;
2916         $date{'day'} = $days[$wday];
2917         $date{'month'} = $months[$mon];
2918         $date{'rfc2822'}   = sprintf "%s, %d %s %4d %02d:%02d:%02d +0000",
2919                              $days[$wday], $mday, $months[$mon], 1900+$year, $hour ,$min, $sec;
2920         $date{'mday-time'} = sprintf "%d %s %02d:%02d",
2921                              $mday, $months[$mon], $hour ,$min;
2922         $date{'iso-8601'}  = sprintf "%04d-%02d-%02dT%02d:%02d:%02dZ",
2923                              1900+$year, 1+$mon, $mday, $hour ,$min, $sec;
2924
2925         $tz =~ m/^([+\-][0-9][0-9])([0-9][0-9])$/;
2926         my $local = $epoch + ((int $1 + ($2/60)) * 3600);
2927         ($sec, $min, $hour, $mday, $mon, $year, $wday, $yday) = gmtime($local);
2928         $date{'hour_local'} = $hour;
2929         $date{'minute_local'} = $min;
2930         $date{'tz_local'} = $tz;
2931         $date{'iso-tz'} = sprintf("%04d-%02d-%02d %02d:%02d:%02d %s",
2932                                   1900+$year, $mon+1, $mday,
2933                                   $hour, $min, $sec, $tz);
2934         return %date;
2935 }
2936
2937 sub parse_tag {
2938         my $tag_id = shift;
2939         my %tag;
2940         my @comment;
2941
2942         open my $fd, "-|", git_cmd(), "cat-file", "tag", $tag_id or return;
2943         $tag{'id'} = $tag_id;
2944         while (my $line = <$fd>) {
2945                 chomp $line;
2946                 if ($line =~ m/^object ([0-9a-fA-F]{40})$/) {
2947                         $tag{'object'} = $1;
2948                 } elsif ($line =~ m/^type (.+)$/) {
2949                         $tag{'type'} = $1;
2950                 } elsif ($line =~ m/^tag (.+)$/) {
2951                         $tag{'name'} = $1;
2952                 } elsif ($line =~ m/^tagger (.*) ([0-9]+) (.*)$/) {
2953                         $tag{'author'} = $1;
2954                         $tag{'author_epoch'} = $2;
2955                         $tag{'author_tz'} = $3;
2956                         if ($tag{'author'} =~ m/^([^<]+) <([^>]*)>/) {
2957                                 $tag{'author_name'}  = $1;
2958                                 $tag{'author_email'} = $2;
2959                         } else {
2960                                 $tag{'author_name'} = $tag{'author'};
2961                         }
2962                 } elsif ($line =~ m/--BEGIN/) {
2963                         push @comment, $line;
2964                         last;
2965                 } elsif ($line eq "") {
2966                         last;
2967                 }
2968         }
2969         push @comment, <$fd>;
2970         $tag{'comment'} = \@comment;
2971         close $fd or return;
2972         if (!defined $tag{'name'}) {
2973                 return
2974         };
2975         return %tag
2976 }
2977
2978 sub parse_commit_text {
2979         my ($commit_text, $withparents) = @_;
2980         my @commit_lines = split '\n', $commit_text;
2981         my %co;
2982
2983         pop @commit_lines; # Remove '\0'
2984
2985         if (! @commit_lines) {
2986                 return;
2987         }
2988
2989         my $header = shift @commit_lines;
2990         if ($header !~ m/^[0-9a-fA-F]{40}/) {
2991                 return;
2992         }
2993         ($co{'id'}, my @parents) = split ' ', $header;
2994         while (my $line = shift @commit_lines) {
2995                 last if $line eq "\n";
2996                 if ($line =~ m/^tree ([0-9a-fA-F]{40})$/) {
2997                         $co{'tree'} = $1;
2998                 } elsif ((!defined $withparents) && ($line =~ m/^parent ([0-9a-fA-F]{40})$/)) {
2999                         push @parents, $1;
3000                 } elsif ($line =~ m/^author (.*) ([0-9]+) (.*)$/) {
3001                         $co{'author'} = to_utf8($1);
3002                         $co{'author_epoch'} = $2;
3003                         $co{'author_tz'} = $3;
3004                         if ($co{'author'} =~ m/^([^<]+) <([^>]*)>/) {
3005                                 $co{'author_name'}  = $1;
3006                                 $co{'author_email'} = $2;
3007                         } else {
3008                                 $co{'author_name'} = $co{'author'};
3009                         }
3010                 } elsif ($line =~ m/^committer (.*) ([0-9]+) (.*)$/) {
3011                         $co{'committer'} = to_utf8($1);
3012                         $co{'committer_epoch'} = $2;
3013                         $co{'committer_tz'} = $3;
3014                         if ($co{'committer'} =~ m/^([^<]+) <([^>]*)>/) {
3015                                 $co{'committer_name'}  = $1;
3016                                 $co{'committer_email'} = $2;
3017                         } else {
3018                                 $co{'committer_name'} = $co{'committer'};
3019                         }
3020                 }
3021         }
3022         if (!defined $co{'tree'}) {
3023                 return;
3024         };
3025         $co{'parents'} = \@parents;
3026         $co{'parent'} = $parents[0];
3027
3028         foreach my $title (@commit_lines) {
3029                 $title =~ s/^    //;
3030                 if ($title ne "") {
3031                         $co{'title'} = chop_str($title, 80, 5);
3032                         # remove leading stuff of merges to make the interesting part visible
3033                         if (length($title) > 50) {
3034                                 $title =~ s/^Automatic //;
3035                                 $title =~ s/^merge (of|with) /Merge ... /i;
3036                                 if (length($title) > 50) {
3037                                         $title =~ s/(http|rsync):\/\///;
3038                                 }
3039                                 if (length($title) > 50) {
3040                                         $title =~ s/(master|www|rsync)\.//;
3041                                 }
3042                                 if (length($title) > 50) {
3043                                         $title =~ s/kernel.org:?//;
3044                                 }
3045                                 if (length($title) > 50) {
3046                                         $title =~ s/\/pub\/scm//;
3047                                 }
3048                         }
3049                         $co{'title_short'} = chop_str($title, 50, 5);
3050                         last;
3051                 }
3052         }
3053         if (! defined $co{'title'} || $co{'title'} eq "") {
3054                 $co{'title'} = $co{'title_short'} = '(no commit message)';
3055         }
3056         # remove added spaces
3057         foreach my $line (@commit_lines) {
3058                 $line =~ s/^    //;
3059         }
3060         $co{'comment'} = \@commit_lines;
3061
3062         my $age = time - $co{'committer_epoch'};
3063         $co{'age'} = $age;
3064         $co{'age_string'} = age_string($age);
3065         my ($sec, $min, $hour, $mday, $mon, $year, $wday, $yday) = gmtime($co{'committer_epoch'});
3066         if ($age > 60*60*24*7*2) {
3067                 $co{'age_string_date'} = sprintf "%4i-%02u-%02i", 1900 + $year, $mon+1, $mday;
3068                 $co{'age_string_age'} = $co{'age_string'};
3069         } else {
3070                 $co{'age_string_date'} = $co{'age_string'};
3071                 $co{'age_string_age'} = sprintf "%4i-%02u-%02i", 1900 + $year, $mon+1, $mday;
3072         }
3073         return %co;
3074 }
3075
3076 sub parse_commit {
3077         my ($commit_id) = @_;
3078         my %co;
3079
3080         local $/ = "\0";
3081
3082         open my $fd, "-|", git_cmd(), "rev-list",
3083                 "--parents",
3084                 "--header",
3085                 "--max-count=1",
3086                 $commit_id,
3087                 "--",
3088                 or die_error(500, "Open git-rev-list failed");
3089         %co = parse_commit_text(<$fd>, 1);
3090         close $fd;
3091
3092         return %co;
3093 }
3094
3095 sub parse_commits {
3096         my ($commit_id, $maxcount, $skip, $filename, @args) = @_;
3097         my @cos;
3098
3099         $maxcount ||= 1;
3100         $skip ||= 0;
3101
3102         local $/ = "\0";
3103
3104         open my $fd, "-|", git_cmd(), "rev-list",
3105                 "--header",
3106                 @args,
3107                 ("--max-count=" . $maxcount),
3108                 ("--skip=" . $skip),
3109                 @extra_options,
3110                 $commit_id,
3111                 "--",
3112                 ($filename ? ($filename) : ())
3113                 or die_error(500, "Open git-rev-list failed");
3114         while (my $line = <$fd>) {
3115                 my %co = parse_commit_text($line);
3116                 push @cos, \%co;
3117         }
3118         close $fd;
3119
3120         return wantarray ? @cos : \@cos;
3121 }
3122
3123 # parse line of git-diff-tree "raw" output
3124 sub parse_difftree_raw_line {
3125         my $line = shift;
3126         my %res;
3127
3128         # ':100644 100644 03b218260e99b78c6df0ed378e59ed9205ccc96d 3b93d5e7cc7f7dd4ebed13a5cc1a4ad976fc94d8 M   ls-files.c'
3129         # ':100644 100644 7f9281985086971d3877aca27704f2aaf9c448ce bc190ebc71bbd923f2b728e505408f5e54bd073a M   rev-tree.c'
3130         if ($line =~ m/^:([0-7]{6}) ([0-7]{6}) ([0-9a-fA-F]{40}) ([0-9a-fA-F]{40}) (.)([0-9]{0,3})\t(.*)$/) {
3131                 $res{'from_mode'} = $1;
3132                 $res{'to_mode'} = $2;
3133                 $res{'from_id'} = $3;
3134                 $res{'to_id'} = $4;
3135                 $res{'status'} = $5;
3136                 $res{'similarity'} = $6;
3137                 if ($res{'status'} eq 'R' || $res{'status'} eq 'C') { # renamed or copied
3138                         ($res{'from_file'}, $res{'to_file'}) = map { unquote($_) } split("\t", $7);
3139                 } else {
3140                         $res{'from_file'} = $res{'to_file'} = $res{'file'} = unquote($7);
3141                 }
3142         }
3143         # '::100755 100755 100755 60e79ca1b01bc8b057abe17ddab484699a7f5fdb 94067cc5f73388f33722d52ae02f44692bc07490 94067cc5f73388f33722d52ae02f44692bc07490 MR git-gui/git-gui.sh'
3144         # combined diff (for merge commit)
3145         elsif ($line =~ s/^(::+)((?:[0-7]{6} )+)((?:[0-9a-fA-F]{40} )+)([a-zA-Z]+)\t(.*)$//) {
3146                 $res{'nparents'}  = length($1);
3147                 $res{'from_mode'} = [ split(' ', $2) ];
3148                 $res{'to_mode'} = pop @{$res{'from_mode'}};
3149                 $res{'from_id'} = [ split(' ', $3) ];
3150                 $res{'to_id'} = pop @{$res{'from_id'}};
3151                 $res{'status'} = [ split('', $4) ];
3152                 $res{'to_file'} = unquote($5);
3153         }
3154         # 'c512b523472485aef4fff9e57b229d9d243c967f'
3155         elsif ($line =~ m/^([0-9a-fA-F]{40})$/) {
3156                 $res{'commit'} = $1;
3157         }
3158
3159         return wantarray ? %res : \%res;
3160 }
3161
3162 # wrapper: return parsed line of git-diff-tree "raw" output
3163 # (the argument might be raw line, or parsed info)
3164 sub parsed_difftree_line {
3165         my $line_or_ref = shift;
3166
3167         if (ref($line_or_ref) eq "HASH") {
3168                 # pre-parsed (or generated by hand)
3169                 return $line_or_ref;
3170         } else {
3171                 return parse_difftree_raw_line($line_or_ref);
3172         }
3173 }
3174
3175 # parse line of git-ls-tree output
3176 sub parse_ls_tree_line {
3177         my $line = shift;
3178         my %opts = @_;
3179         my %res;
3180
3181         if ($opts{'-l'}) {
3182                 #'100644 blob 0fa3f3a66fb6a137f6ec2c19351ed4d807070ffa   16717  panic.c'
3183                 $line =~ m/^([0-9]+) (.+) ([0-9a-fA-F]{40}) +(-|[0-9]+)\t(.+)$/s;
3184
3185                 $res{'mode'} = $1;
3186                 $res{'type'} = $2;
3187                 $res{'hash'} = $3;
3188                 $res{'size'} = $4;
3189                 if ($opts{'-z'}) {
3190                         $res{'name'} = $5;
3191                 } else {
3192                         $res{'name'} = unquote($5);
3193                 }
3194         } else {
3195                 #'100644 blob 0fa3f3a66fb6a137f6ec2c19351ed4d807070ffa  panic.c'
3196                 $line =~ m/^([0-9]+) (.+) ([0-9a-fA-F]{40})\t(.+)$/s;
3197
3198                 $res{'mode'} = $1;
3199                 $res{'type'} = $2;
3200                 $res{'hash'} = $3;
3201                 if ($opts{'-z'}) {
3202                         $res{'name'} = $4;
3203                 } else {
3204                         $res{'name'} = unquote($4);
3205                 }
3206         }
3207
3208         return wantarray ? %res : \%res;
3209 }
3210
3211 # generates _two_ hashes, references to which are passed as 2 and 3 argument
3212 sub parse_from_to_diffinfo {
3213         my ($diffinfo, $from, $to, @parents) = @_;
3214
3215         if ($diffinfo->{'nparents'}) {
3216                 # combined diff
3217                 $from->{'file'} = [];
3218                 $from->{'href'} = [];
3219                 fill_from_file_info($diffinfo, @parents)
3220                         unless exists $diffinfo->{'from_file'};
3221                 for (my $i = 0; $i < $diffinfo->{'nparents'}; $i++) {
3222                         $from->{'file'}[$i] =
3223                                 defined $diffinfo->{'from_file'}[$i] ?
3224                                         $diffinfo->{'from_file'}[$i] :
3225                                         $diffinfo->{'to_file'};
3226                         if ($diffinfo->{'status'}[$i] ne "A") { # not new (added) file
3227                                 $from->{'href'}[$i] = href(action=>"blob",
3228                                                            hash_base=>$parents[$i],
3229                                                            hash=>$diffinfo->{'from_id'}[$i],
3230                                                            file_name=>$from->{'file'}[$i]);
3231                         } else {
3232                                 $from->{'href'}[$i] = undef;
3233                         }
3234                 }
3235         } else {
3236                 # ordinary (not combined) diff
3237                 $from->{'file'} = $diffinfo->{'from_file'};
3238                 if ($diffinfo->{'status'} ne "A") { # not new (added) file
3239                         $from->{'href'} = href(action=>"blob", hash_base=>$hash_parent,
3240                                                hash=>$diffinfo->{'from_id'},
3241                                                file_name=>$from->{'file'});
3242                 } else {
3243                         delete $from->{'href'};
3244                 }
3245         }
3246
3247         $to->{'file'} = $diffinfo->{'to_file'};
3248         if (!is_deleted($diffinfo)) { # file exists in result
3249                 $to->{'href'} = href(action=>"blob", hash_base=>$hash,
3250                                      hash=>$diffinfo->{'to_id'},
3251                                      file_name=>$to->{'file'});
3252         } else {
3253                 delete $to->{'href'};
3254         }
3255 }
3256
3257 ## ......................................................................
3258 ## parse to array of hashes functions
3259
3260 sub git_get_heads_list {
3261         my ($limit, @classes) = @_;
3262         @classes = ('heads') unless @classes;
3263         my @patterns = map { "refs/$_" } @classes;
3264         my @headslist;
3265
3266         open my $fd, '-|', git_cmd(), 'for-each-ref',
3267                 ($limit ? '--count='.($limit+1) : ()), '--sort=-committerdate',
3268                 '--format=%(objectname) %(refname) %(subject)%00%(committer)',
3269                 @patterns
3270                 or return;
3271         while (my $line = <$fd>) {
3272                 my %ref_item;
3273
3274                 chomp $line;
3275                 my ($refinfo, $committerinfo) = split(/\0/, $line);
3276                 my ($hash, $name, $title) = split(' ', $refinfo, 3);
3277                 my ($committer, $epoch, $tz) =
3278                         ($committerinfo =~ /^(.*) ([0-9]+) (.*)$/);
3279                 $ref_item{'fullname'}  = $name;
3280                 $name =~ s!^refs/(?:head|remote)s/!!;
3281
3282                 $ref_item{'name'}  = $name;
3283                 $ref_item{'id'}    = $hash;
3284                 $ref_item{'title'} = $title || '(no commit message)';
3285                 $ref_item{'epoch'} = $epoch;
3286                 if ($epoch) {
3287                         $ref_item{'age'} = age_string(time - $ref_item{'epoch'});
3288                 } else {
3289                         $ref_item{'age'} = "unknown";
3290                 }
3291
3292                 push @headslist, \%ref_item;
3293         }
3294         close $fd;
3295
3296         return wantarray ? @headslist : \@headslist;
3297 }
3298
3299 sub git_get_tags_list {
3300         my $limit = shift;
3301         my @tagslist;
3302
3303         open my $fd, '-|', git_cmd(), 'for-each-ref',
3304                 ($limit ? '--count='.($limit+1) : ()), '--sort=-creatordate',
3305                 '--format=%(objectname) %(objecttype) %(refname) '.
3306                 '%(*objectname) %(*objecttype) %(subject)%00%(creator)',
3307                 'refs/tags'
3308                 or return;
3309         while (my $line = <$fd>) {
3310                 my %ref_item;
3311
3312                 chomp $line;
3313                 my ($refinfo, $creatorinfo) = split(/\0/, $line);
3314                 my ($id, $type, $name, $refid, $reftype, $title) = split(' ', $refinfo, 6);
3315                 my ($creator, $epoch, $tz) =
3316                         ($creatorinfo =~ /^(.*) ([0-9]+) (.*)$/);
3317                 $ref_item{'fullname'} = $name;
3318                 $name =~ s!^refs/tags/!!;
3319
3320                 $ref_item{'type'} = $type;
3321                 $ref_item{'id'} = $id;
3322                 $ref_item{'name'} = $name;
3323                 if ($type eq "tag") {
3324                         $ref_item{'subject'} = $title;
3325                         $ref_item{'reftype'} = $reftype;
3326                         $ref_item{'refid'}   = $refid;
3327                 } else {
3328                         $ref_item{'reftype'} = $type;
3329                         $ref_item{'refid'}   = $id;
3330                 }
3331
3332                 if ($type eq "tag" || $type eq "commit") {
3333                         $ref_item{'epoch'} = $epoch;
3334                         if ($epoch) {
3335                                 $ref_item{'age'} = age_string(time - $ref_item{'epoch'});
3336                         } else {
3337                                 $ref_item{'age'} = "unknown";
3338                         }
3339                 }
3340
3341                 push @tagslist, \%ref_item;
3342         }
3343         close $fd;
3344
3345         return wantarray ? @tagslist : \@tagslist;
3346 }
3347
3348 ## ----------------------------------------------------------------------
3349 ## filesystem-related functions
3350
3351 sub get_file_owner {
3352         my $path = shift;
3353
3354         my ($dev, $ino, $mode, $nlink, $st_uid, $st_gid, $rdev, $size) = stat($path);
3355         my ($name, $passwd, $uid, $gid, $quota, $comment, $gcos, $dir, $shell) = getpwuid($st_uid);
3356         if (!defined $gcos) {
3357                 return undef;
3358         }
3359         my $owner = $gcos;
3360         $owner =~ s/[,;].*$//;
3361         return to_utf8($owner);
3362 }
3363
3364 # assume that file exists
3365 sub insert_file {
3366         my $filename = shift;
3367
3368         open my $fd, '<', $filename;
3369         print map { to_utf8($_) } <$fd>;
3370         close $fd;
3371 }
3372
3373 ## ......................................................................
3374 ## mimetype related functions
3375
3376 sub mimetype_guess_file {
3377         my $filename = shift;
3378         my $mimemap = shift;
3379         -r $mimemap or return undef;
3380
3381         my %mimemap;
3382         open(my $mh, '<', $mimemap) or return undef;
3383         while (<$mh>) {
3384                 next if m/^#/; # skip comments
3385                 my ($mimetype, $exts) = split(/\t+/);
3386                 if (defined $exts) {
3387                         my @exts = split(/\s+/, $exts);
3388                         foreach my $ext (@exts) {
3389                                 $mimemap{$ext} = $mimetype;
3390                         }
3391                 }
3392         }
3393         close($mh);
3394
3395         $filename =~ /\.([^.]*)$/;
3396         return $mimemap{$1};
3397 }
3398
3399 sub mimetype_guess {
3400         my $filename = shift;
3401         my $mime;
3402         $filename =~ /\./ or return undef;
3403
3404         if ($mimetypes_file) {
3405                 my $file = $mimetypes_file;
3406                 if ($file !~ m!^/!) { # if it is relative path
3407                         # it is relative to project
3408                         $file = "$projectroot/$project/$file";
3409                 }
3410                 $mime = mimetype_guess_file($filename, $file);
3411         }
3412         $mime ||= mimetype_guess_file($filename, '/etc/mime.types');
3413         return $mime;
3414 }
3415
3416 sub blob_mimetype {
3417         my $fd = shift;
3418         my $filename = shift;
3419
3420         if ($filename) {
3421                 my $mime = mimetype_guess($filename);
3422                 $mime and return $mime;
3423         }
3424
3425         # just in case
3426         return $default_blob_plain_mimetype unless $fd;
3427
3428         if (-T $fd) {
3429                 return 'text/plain';
3430         } elsif (! $filename) {
3431                 return 'application/octet-stream';
3432         } elsif ($filename =~ m/\.png$/i) {
3433                 return 'image/png';
3434         } elsif ($filename =~ m/\.gif$/i) {
3435                 return 'image/gif';
3436         } elsif ($filename =~ m/\.jpe?g$/i) {
3437                 return 'image/jpeg';
3438         } else {
3439                 return 'application/octet-stream';
3440         }
3441 }
3442
3443 sub blob_contenttype {
3444         my ($fd, $file_name, $type) = @_;
3445
3446         $type ||= blob_mimetype($fd, $file_name);
3447         if ($type eq 'text/plain' && defined $default_text_plain_charset) {
3448                 $type .= "; charset=$default_text_plain_charset";
3449         }
3450
3451         return $type;
3452 }
3453
3454 # guess file syntax for syntax highlighting; return undef if no highlighting
3455 # the name of syntax can (in the future) depend on syntax highlighter used
3456 sub guess_file_syntax {
3457         my ($highlight, $mimetype, $file_name) = @_;
3458         return undef unless ($highlight && defined $file_name);
3459         my $basename = basename($file_name, '.in');
3460         return $highlight_basename{$basename}
3461                 if exists $highlight_basename{$basename};
3462
3463         $basename =~ /\.([^.]*)$/;
3464         my $ext = $1 or return undef;
3465         return $highlight_ext{$ext}
3466                 if exists $highlight_ext{$ext};
3467
3468         return undef;
3469 }
3470
3471 # run highlighter and return FD of its output,
3472 # or return original FD if no highlighting
3473 sub run_highlighter {
3474         my ($fd, $highlight, $syntax) = @_;
3475         return $fd unless ($highlight && defined $syntax);
3476
3477         close $fd;
3478         open $fd, quote_command(git_cmd(), "cat-file", "blob", $hash)." | ".
3479                   quote_command($highlight_bin).
3480                   " --replace-tabs=8 --fragment --syntax $syntax |"
3481                 or die_error(500, "Couldn't open file or run syntax highlighter");
3482         return $fd;
3483 }
3484
3485 ## ======================================================================
3486 ## functions printing HTML: header, footer, error page
3487
3488 sub get_page_title {
3489         my $title = to_utf8($site_name);
3490
3491         return $title unless (defined $project);
3492         $title .= " - " . to_utf8($project);
3493
3494         return $title unless (defined $action);
3495         $title .= "/$action"; # $action is US-ASCII (7bit ASCII)
3496
3497         return $title unless (defined $file_name);
3498         $title .= " - " . esc_path($file_name);
3499         if ($action eq "tree" && $file_name !~ m|/$|) {
3500                 $title .= "/";
3501         }
3502
3503         return $title;
3504 }
3505
3506 sub print_feed_meta {
3507         if (defined $project) {
3508                 my %href_params = get_feed_info();
3509                 if (!exists $href_params{'-title'}) {
3510                         $href_params{'-title'} = 'log';
3511                 }
3512
3513                 foreach my $format (qw(RSS Atom)) {
3514                         my $type = lc($format);
3515                         my %link_attr = (
3516                                 '-rel' => 'alternate',
3517                                 '-title' => esc_attr("$project - $href_params{'-title'} - $format feed"),
3518                                 '-type' => "application/$type+xml"
3519                         );
3520
3521                         $href_params{'action'} = $type;
3522                         $link_attr{'-href'} = href(%href_params);
3523                         print "<link ".
3524                               "rel=\"$link_attr{'-rel'}\" ".
3525                               "title=\"$link_attr{'-title'}\" ".
3526                               "href=\"$link_attr{'-href'}\" ".
3527                               "type=\"$link_attr{'-type'}\" ".
3528                               "/>\n";
3529
3530                         $href_params{'extra_options'} = '--no-merges';
3531                         $link_attr{'-href'} = href(%href_params);
3532                         $link_attr{'-title'} .= ' (no merges)';
3533                         print "<link ".
3534                               "rel=\"$link_attr{'-rel'}\" ".
3535                               "title=\"$link_attr{'-title'}\" ".
3536                               "href=\"$link_attr{'-href'}\" ".
3537                               "type=\"$link_attr{'-type'}\" ".
3538                               "/>\n";
3539                 }
3540
3541         } else {
3542                 printf('<link rel="alternate" title="%s projects list" '.
3543                        'href="%s" type="text/plain; charset=utf-8" />'."\n",
3544                        esc_attr($site_name), href(project=>undef, action=>"project_index"));
3545                 printf('<link rel="alternate" title="%s projects feeds" '.
3546                        'href="%s" type="text/x-opml" />'."\n",
3547                        esc_attr($site_name), href(project=>undef, action=>"opml"));
3548         }
3549 }
3550
3551 sub git_header_html {
3552         my $status = shift || "200 OK";
3553         my $expires = shift;
3554         my %opts = @_;
3555
3556         my $title = get_page_title();
3557         my $content_type;
3558         # require explicit support from the UA if we are to send the page as
3559         # 'application/xhtml+xml', otherwise send it as plain old 'text/html'.
3560         # we have to do this because MSIE sometimes globs '*/*', pretending to
3561         # support xhtml+xml but choking when it gets what it asked for.
3562         if (defined $cgi->http('HTTP_ACCEPT') &&
3563             $cgi->http('HTTP_ACCEPT') =~ m/(,|;|\s|^)application\/xhtml\+xml(,|;|\s|$)/ &&
3564             $cgi->Accept('application/xhtml+xml') != 0) {
3565                 $content_type = 'application/xhtml+xml';
3566         } else {
3567                 $content_type = 'text/html';
3568         }
3569         print $cgi->header(-type=>$content_type, -charset => 'utf-8',
3570                            -status=> $status, -expires => $expires)
3571                 unless ($opts{'-no_http_header'});
3572         my $mod_perl_version = $ENV{'MOD_PERL'} ? " $ENV{'MOD_PERL'}" : '';
3573         print <<EOF;
3574 <?xml version="1.0" encoding="utf-8"?>
3575 <!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Strict//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-strict.dtd">
3576 <html xmlns="http://www.w3.org/1999/xhtml" xml:lang="en-US" lang="en-US">
3577 <!-- git web interface version $version, (C) 2005-2006, Kay Sievers <kay.sievers\@vrfy.org>, Christian Gierke -->
3578 <!-- git core binaries version $git_version -->
3579 <head>
3580 <meta http-equiv="content-type" content="$content_type; charset=utf-8"/>
3581 <meta name="generator" content="gitweb/$version git/$git_version$mod_perl_version"/>
3582 <meta name="robots" content="index, nofollow"/>
3583 <title>$title</title>
3584 EOF
3585         # the stylesheet, favicon etc urls won't work correctly with path_info
3586         # unless we set the appropriate base URL
3587         if ($ENV{'PATH_INFO'}) {
3588                 print "<base href=\"".esc_url($base_url)."\" />\n";
3589         }
3590         # print out each stylesheet that exist, providing backwards capability
3591         # for those people who defined $stylesheet in a config file
3592         if (defined $stylesheet) {
3593                 print '<link rel="stylesheet" type="text/css" href="'.esc_url($stylesheet).'"/>'."\n";
3594         } else {
3595                 foreach my $stylesheet (@stylesheets) {
3596                         next unless $stylesheet;
3597                         print '<link rel="stylesheet" type="text/css" href="'.esc_url($stylesheet).'"/>'."\n";
3598                 }
3599         }
3600         print_feed_meta()
3601                 if ($status eq '200 OK');
3602         if (defined $favicon) {
3603                 print qq(<link rel="shortcut icon" href=").esc_url($favicon).qq(" type="image/png" />\n);
3604         }
3605
3606         print "</head>\n" .
3607               "<body>\n";
3608
3609         if (defined $site_header && -f $site_header) {
3610                 insert_file($site_header);
3611         }
3612
3613         print "<div class=\"page_header\">\n";
3614         if (defined $logo) {
3615                 print $cgi->a({-href => esc_url($logo_url),
3616                                -title => $logo_label},
3617                               $cgi->img({-src => esc_url($logo),
3618                                          -width => 72, -height => 27,
3619                                          -alt => "git",
3620                                          -class => "logo"}));
3621         }
3622         print $cgi->a({-href => esc_url($home_link)}, $home_link_str) . " / ";
3623         if (defined $project) {
3624                 print $cgi->a({-href => href(action=>"summary")}, esc_html($project));
3625                 if (defined $action) {
3626                         my $action_print = $action ;
3627                         if (defined $opts{-action_extra}) {
3628                                 $action_print = $cgi->a({-href => href(action=>$action)},
3629                                         $action);
3630                         }
3631                         print " / $action_print";
3632                 }
3633                 if (defined $opts{-action_extra}) {
3634                         print " / $opts{-action_extra}";
3635                 }
3636                 print "\n";
3637         }
3638         print "</div>\n";
3639
3640         my $have_search = gitweb_check_feature('search');
3641         if (defined $project && $have_search) {
3642                 if (!defined $searchtext) {
3643                         $searchtext = "";
3644                 }
3645                 my $search_hash;
3646                 if (defined $hash_base) {
3647                         $search_hash = $hash_base;
3648                 } elsif (defined $hash) {
3649                         $search_hash = $hash;
3650                 } else {
3651                         $search_hash = "HEAD";
3652                 }
3653                 my $action = $my_uri;
3654                 my $use_pathinfo = gitweb_check_feature('pathinfo');
3655                 if ($use_pathinfo) {
3656                         $action .= "/".esc_url($project);
3657                 }
3658                 print $cgi->startform(-method => "get", -action => $action) .
3659                       "<div class=\"search\">\n" .
3660                       (!$use_pathinfo &&
3661                       $cgi->input({-name=>"p", -value=>$project, -type=>"hidden"}) . "\n") .
3662                       $cgi->input({-name=>"a", -value=>"search", -type=>"hidden"}) . "\n" .
3663                       $cgi->input({-name=>"h", -value=>$search_hash, -type=>"hidden"}) . "\n" .
3664                       $cgi->popup_menu(-name => 'st', -default => 'commit',
3665                                        -values => ['commit', 'grep', 'author', 'committer', 'pickaxe']) .
3666                       $cgi->sup($cgi->a({-href => href(action=>"search_help")}, "?")) .
3667                       " search:\n",
3668                       $cgi->textfield(-name => "s", -value => $searchtext) . "\n" .
3669                       "<span title=\"Extended regular expression\">" .
3670                       $cgi->checkbox(-name => 'sr', -value => 1, -label => 're',
3671                                      -checked => $search_use_regexp) .
3672                       "</span>" .
3673                       "</div>" .
3674                       $cgi->end_form() . "\n";
3675         }
3676 }
3677
3678 sub git_footer_html {
3679         my $feed_class = 'rss_logo';
3680
3681         print "<div class=\"page_footer\">\n";
3682         if (defined $project) {
3683                 my $descr = git_get_project_description($project);
3684                 if (defined $descr) {
3685                         print "<div class=\"page_footer_text\">" . esc_html($descr) . "</div>\n";
3686                 }
3687
3688                 my %href_params = get_feed_info();
3689                 if (!%href_params) {
3690                         $feed_class .= ' generic';
3691                 }
3692                 $href_params{'-title'} ||= 'log';
3693
3694                 foreach my $format (qw(RSS Atom)) {
3695                         $href_params{'action'} = lc($format);
3696                         print $cgi->a({-href => href(%href_params),
3697                                       -title => "$href_params{'-title'} $format feed",
3698                                       -class => $feed_class}, $format)."\n";
3699                 }
3700
3701         } else {
3702                 print $cgi->a({-href => href(project=>undef, action=>"opml"),
3703                               -class => $feed_class}, "OPML") . " ";
3704                 print $cgi->a({-href => href(project=>undef, action=>"project_index"),
3705                               -class => $feed_class}, "TXT") . "\n";
3706         }
3707         print "</div>\n"; # class="page_footer"
3708
3709         if (defined $t0 && gitweb_check_feature('timed')) {
3710                 print "<div id=\"generating_info\">\n";
3711                 print 'This page took '.
3712                       '<span id="generating_time" class="time_span">'.
3713                       tv_interval($t0, [ gettimeofday() ]).
3714                       ' seconds </span>'.
3715                       ' and '.
3716                       '<span id="generating_cmd">'.
3717                       $number_of_git_cmds.
3718                       '</span> git commands '.
3719                       " to generate.\n";
3720                 print "</div>\n"; # class="page_footer"
3721         }
3722
3723         if (defined $site_footer && -f $site_footer) {
3724                 insert_file($site_footer);
3725         }
3726
3727         print qq!<script type="text/javascript" src="!.esc_url($javascript).qq!"></script>\n!;
3728         if (defined $action &&
3729             $action eq 'blame_incremental') {
3730                 print qq!<script type="text/javascript">\n!.
3731                       qq!startBlame("!. href(action=>"blame_data", -replay=>1) .qq!",\n!.
3732                       qq!           "!. href() .qq!");\n!.
3733                       qq!</script>\n!;
3734         } elsif (gitweb_check_feature('javascript-actions')) {
3735                 print qq!<script type="text/javascript">\n!.
3736                       qq!window.onload = fixLinks;\n!.
3737                       qq!</script>\n!;
3738         }
3739
3740         print "</body>\n" .
3741               "</html>";
3742 }
3743
3744 # die_error(<http_status_code>, <error_message>[, <detailed_html_description>])
3745 # Example: die_error(404, 'Hash not found')
3746 # By convention, use the following status codes (as defined in RFC 2616):
3747 # 400: Invalid or missing CGI parameters, or
3748 #      requested object exists but has wrong type.
3749 # 403: Requested feature (like "pickaxe" or "snapshot") not enabled on
3750 #      this server or project.
3751 # 404: Requested object/revision/project doesn't exist.
3752 # 500: The server isn't configured properly, or
3753 #      an internal error occurred (e.g. failed assertions caused by bugs), or
3754 #      an unknown error occurred (e.g. the git binary died unexpectedly).
3755 # 503: The server is currently unavailable (because it is overloaded,
3756 #      or down for maintenance).  Generally, this is a temporary state.
3757 sub die_error {
3758         my $status = shift || 500;
3759         my $error = esc_html(shift) || "Internal Server Error";
3760         my $extra = shift;
3761         my %opts = @_;
3762
3763         my %http_responses = (
3764                 400 => '400 Bad Request',
3765                 403 => '403 Forbidden',
3766                 404 => '404 Not Found',
3767                 500 => '500 Internal Server Error',
3768                 503 => '503 Service Unavailable',
3769         );
3770         git_header_html($http_responses{$status}, undef, %opts);
3771         print <<EOF;
3772 <div class="page_body">
3773 <br /><br />
3774 $status - $error
3775 <br />
3776 EOF
3777         if (defined $extra) {
3778                 print "<hr />\n" .
3779                       "$extra\n";
3780         }
3781         print "</div>\n";
3782
3783         git_footer_html();
3784         goto DONE_GITWEB
3785                 unless ($opts{'-error_handler'});
3786 }
3787
3788 ## ----------------------------------------------------------------------
3789 ## functions printing or outputting HTML: navigation
3790
3791 sub git_print_page_nav {
3792         my ($current, $suppress, $head, $treehead, $treebase, $extra) = @_;
3793         $extra = '' if !defined $extra; # pager or formats
3794
3795         my @navs = qw(summary shortlog log commit commitdiff tree);
3796         if ($suppress) {
3797                 @navs = grep { $_ ne $suppress } @navs;
3798         }
3799
3800         my %arg = map { $_ => {action=>$_} } @navs;
3801         if (defined $head) {
3802                 for (qw(commit commitdiff)) {
3803                         $arg{$_}{'hash'} = $head;
3804                 }
3805                 if ($current =~ m/^(tree | log | shortlog | commit | commitdiff | search)$/x) {
3806                         for (qw(shortlog log)) {
3807                                 $arg{$_}{'hash'} = $head;
3808                         }
3809                 }
3810         }
3811
3812         $arg{'tree'}{'hash'} = $treehead if defined $treehead;
3813         $arg{'tree'}{'hash_base'} = $treebase if defined $treebase;
3814
3815         my @actions = gitweb_get_feature('actions');
3816         my %repl = (
3817                 '%' => '%',
3818                 'n' => $project,         # project name
3819                 'f' => $git_dir,         # project path within filesystem
3820                 'h' => $treehead || '',  # current hash ('h' parameter)
3821                 'b' => $treebase || '',  # hash base ('hb' parameter)
3822         );
3823         while (@actions) {
3824                 my ($label, $link, $pos) = splice(@actions,0,3);
3825                 # insert
3826                 @navs = map { $_ eq $pos ? ($_, $label) : $_ } @navs;
3827                 # munch munch
3828                 $link =~ s/%([%nfhb])/$repl{$1}/g;
3829                 $arg{$label}{'_href'} = $link;
3830         }
3831
3832         print "<div class=\"page_nav\">\n" .
3833                 (join " | ",
3834                  map { $_ eq $current ?
3835                        $_ : $cgi->a({-href => ($arg{$_}{_href} ? $arg{$_}{_href} : href(%{$arg{$_}}))}, "$_")
3836                  } @navs);
3837         print "<br/>\n$extra<br/>\n" .
3838               "</div>\n";
3839 }
3840
3841 # returns a submenu for the nagivation of the refs views (tags, heads,
3842 # remotes) with the current view disabled and the remotes view only
3843 # available if the feature is enabled
3844 sub format_ref_views {
3845         my ($current) = @_;
3846         my @ref_views = qw{tags heads};
3847         push @ref_views, 'remotes' if gitweb_check_feature('remote_heads');
3848         return join " | ", map {
3849                 $_ eq $current ? $_ :
3850                 $cgi->a({-href => href(action=>$_)}, $_)
3851         } @ref_views
3852 }
3853
3854 sub format_paging_nav {
3855         my ($action, $page, $has_next_link) = @_;
3856         my $paging_nav;
3857
3858
3859         if ($page > 0) {
3860                 $paging_nav .=
3861                         $cgi->a({-href => href(-replay=>1, page=>undef)}, "first") .
3862                         " &sdot; " .
3863                         $cgi->a({-href => href(-replay=>1, page=>$page-1),
3864                                  -accesskey => "p", -title => "Alt-p"}, "prev");
3865         } else {
3866                 $paging_nav .= "first &sdot; prev";
3867         }
3868
3869         if ($has_next_link) {
3870                 $paging_nav .= " &sdot; " .
3871                         $cgi->a({-href => href(-replay=>1, page=>$page+1),
3872                                  -accesskey => "n", -title => "Alt-n"}, "next");
3873         } else {
3874                 $paging_nav .= " &sdot; next";
3875         }
3876
3877         return $paging_nav;
3878 }
3879
3880 ## ......................................................................
3881 ## functions printing or outputting HTML: div
3882
3883 sub git_print_header_div {
3884         my ($action, $title, $hash, $hash_base) = @_;
3885         my %args = ();
3886
3887         $args{'action'} = $action;
3888         $args{'hash'} = $hash if $hash;
3889         $args{'hash_base'} = $hash_base if $hash_base;
3890
3891         print "<div class=\"header\">\n" .
3892               $cgi->a({-href => href(%args), -class => "title"},
3893               $title ? $title : $action) .
3894               "\n</div>\n";
3895 }
3896
3897 sub format_repo_url {
3898         my ($name, $url) = @_;
3899         return "<tr class=\"metadata_url\"><td>$name</td><td>$url</td></tr>\n";
3900 }
3901
3902 # Group output by placing it in a DIV element and adding a header.
3903 # Options for start_div() can be provided by passing a hash reference as the
3904 # first parameter to the function.
3905 # Options to git_print_header_div() can be provided by passing an array
3906 # reference. This must follow the options to start_div if they are present.
3907 # The content can be a scalar, which is output as-is, a scalar reference, which
3908 # is output after html escaping, an IO handle passed either as *handle or
3909 # *handle{IO}, or a function reference. In the latter case all following
3910 # parameters will be taken as argument to the content function call.
3911 sub git_print_section {
3912         my ($div_args, $header_args, $content);
3913         my $arg = shift;
3914         if (ref($arg) eq 'HASH') {
3915                 $div_args = $arg;
3916                 $arg = shift;
3917         }
3918         if (ref($arg) eq 'ARRAY') {
3919                 $header_args = $arg;
3920                 $arg = shift;
3921         }
3922         $content = $arg;
3923
3924         print $cgi->start_div($div_args);
3925         git_print_header_div(@$header_args);
3926
3927         if (ref($content) eq 'CODE') {
3928                 $content->(@_);
3929         } elsif (ref($content) eq 'SCALAR') {
3930                 print esc_html($$content);
3931         } elsif (ref($content) eq 'GLOB' or ref($content) eq 'IO::Handle') {
3932                 print <$content>;
3933         } elsif (!ref($content) && defined($content)) {
3934                 print $content;
3935         }
3936
3937         print $cgi->end_div;
3938 }
3939
3940 sub print_local_time {
3941         print format_local_time(@_);
3942 }
3943
3944 sub format_local_time {
3945         my $localtime = '';
3946         my %date = @_;
3947         if ($date{'hour_local'} < 6) {
3948                 $localtime .= sprintf(" (<span class=\"atnight\">%02d:%02d</span> %s)",
3949                         $date{'hour_local'}, $date{'minute_local'}, $date{'tz_local'});
3950         } else {
3951                 $localtime .= sprintf(" (%02d:%02d %s)",
3952                         $date{'hour_local'}, $date{'minute_local'}, $date{'tz_local'});
3953         }
3954
3955         return $localtime;
3956 }
3957
3958 # Outputs the author name and date in long form
3959 sub git_print_authorship {
3960         my $co = shift;
3961         my %opts = @_;
3962         my $tag = $opts{-tag} || 'div';
3963         my $author = $co->{'author_name'};
3964
3965         my %ad = parse_date($co->{'author_epoch'}, $co->{'author_tz'});
3966         print "<$tag class=\"author_date\">" .
3967               format_search_author($author, "author", esc_html($author)) .
3968               " [$ad{'rfc2822'}";
3969         print_local_time(%ad) if ($opts{-localtime});
3970         print "]" . git_get_avatar($co->{'author_email'}, -pad_before => 1)
3971                   . "</$tag>\n";
3972 }
3973
3974 # Outputs table rows containing the full author or committer information,
3975 # in the format expected for 'commit' view (& similar).
3976 # Parameters are a commit hash reference, followed by the list of people
3977 # to output information for. If the list is empty it defaults to both
3978 # author and committer.
3979 sub git_print_authorship_rows {
3980         my $co = shift;
3981         # too bad we can't use @people = @_ || ('author', 'committer')
3982         my @people = @_;
3983         @people = ('author', 'committer') unless @people;
3984         foreach my $who (@people) {
3985                 my %wd = parse_date($co->{"${who}_epoch"}, $co->{"${who}_tz"});
3986                 print "<tr><td>$who</td><td>" .
3987                       format_search_author($co->{"${who}_name"}, $who,
3988                                esc_html($co->{"${who}_name"})) . " " .
3989                       format_search_author($co->{"${who}_email"}, $who,
3990                                esc_html("<" . $co->{"${who}_email"} . ">")) .
3991                       "</td><td rowspan=\"2\">" .
3992                       git_get_avatar($co->{"${who}_email"}, -size => 'double') .
3993                       "</td></tr>\n" .
3994                       "<tr>" .
3995                       "<td></td><td> $wd{'rfc2822'}";
3996                 print_local_time(%wd);
3997                 print "</td>" .
3998                       "</tr>\n";
3999         }
4000 }
4001
4002 sub git_print_page_path {
4003         my $name = shift;
4004         my $type = shift;
4005         my $hb = shift;
4006
4007
4008         print "<div class=\"page_path\">";
4009         print $cgi->a({-href => href(action=>"tree", hash_base=>$hb),
4010                       -title => 'tree root'}, to_utf8("[$project]"));
4011         print " / ";
4012         if (defined $name) {
4013                 my @dirname = split '/', $name;
4014                 my $basename = pop @dirname;
4015                 my $fullname = '';
4016
4017                 foreach my $dir (@dirname) {
4018                         $fullname .= ($fullname ? '/' : '') . $dir;
4019                         print $cgi->a({-href => href(action=>"tree", file_name=>$fullname,
4020                                                      hash_base=>$hb),
4021                                       -title => $fullname}, esc_path($dir));
4022                         print " / ";
4023                 }
4024                 if (defined $type && $type eq 'blob') {
4025                         print $cgi->a({-href => href(action=>"blob_plain", file_name=>$file_name,
4026                                                      hash_base=>$hb),
4027                                       -title => $name}, esc_path($basename));
4028                 } elsif (defined $type && $type eq 'tree') {
4029                         print $cgi->a({-href => href(action=>"tree", file_name=>$file_name,
4030                                                      hash_base=>$hb),
4031                                       -title => $name}, esc_path($basename));
4032                         print " / ";
4033                 } else {
4034                         print esc_path($basename);
4035                 }
4036         }
4037         print "<br/></div>\n";
4038 }
4039
4040 sub git_print_log {
4041         my $log = shift;
4042         my %opts = @_;
4043
4044         if ($opts{'-remove_title'}) {
4045                 # remove title, i.e. first line of log
4046                 shift @$log;
4047         }
4048         # remove leading empty lines
4049         while (defined $log->[0] && $log->[0] eq "") {
4050                 shift @$log;
4051         }
4052
4053         # print log
4054         my $signoff = 0;
4055         my $empty = 0;
4056         foreach my $line (@$log) {
4057                 if ($line =~ m/^ *(signed[ \-]off[ \-]by[ :]|acked[ \-]by[ :]|cc[ :])/i) {
4058                         $signoff = 1;
4059                         $empty = 0;
4060                         if (! $opts{'-remove_signoff'}) {
4061                                 print "<span class=\"signoff\">" . esc_html($line) . "</span><br/>\n";
4062                                 next;
4063                         } else {
4064                                 # remove signoff lines
4065                                 next;
4066                         }
4067                 } else {
4068                         $signoff = 0;
4069                 }
4070
4071                 # print only one empty line
4072                 # do not print empty line after signoff
4073                 if ($line eq "") {
4074                         next if ($empty || $signoff);
4075                         $empty = 1;
4076                 } else {
4077                         $empty = 0;
4078                 }
4079
4080                 print format_log_line_html($line) . "<br/>\n";
4081         }
4082
4083         if ($opts{'-final_empty_line'}) {
4084                 # end with single empty line
4085                 print "<br/>\n" unless $empty;
4086         }
4087 }
4088
4089 # return link target (what link points to)
4090 sub git_get_link_target {
4091         my $hash = shift;
4092         my $link_target;
4093
4094         # read link
4095         open my $fd, "-|", git_cmd(), "cat-file", "blob", $hash
4096                 or return;
4097         {
4098                 local $/ = undef;
4099                 $link_target = <$fd>;
4100         }
4101         close $fd
4102                 or return;
4103
4104         return $link_target;
4105 }
4106
4107 # given link target, and the directory (basedir) the link is in,
4108 # return target of link relative to top directory (top tree);
4109 # return undef if it is not possible (including absolute links).
4110 sub normalize_link_target {
4111         my ($link_target, $basedir) = @_;
4112
4113         # absolute symlinks (beginning with '/') cannot be normalized
4114         return if (substr($link_target, 0, 1) eq '/');
4115
4116         # normalize link target to path from top (root) tree (dir)
4117         my $path;
4118         if ($basedir) {
4119                 $path = $basedir . '/' . $link_target;
4120         } else {
4121                 # we are in top (root) tree (dir)
4122                 $path = $link_target;
4123         }
4124
4125         # remove //, /./, and /../
4126         my @path_parts;
4127         foreach my $part (split('/', $path)) {
4128                 # discard '.' and ''
4129                 next if (!$part || $part eq '.');
4130                 # handle '..'
4131                 if ($part eq '..') {
4132                         if (@path_parts) {
4133                                 pop @path_parts;
4134                         } else {
4135                                 # link leads outside repository (outside top dir)
4136                                 return;
4137                         }
4138                 } else {
4139                         push @path_parts, $part;
4140                 }
4141         }
4142         $path = join('/', @path_parts);
4143
4144         return $path;
4145 }
4146
4147 # print tree entry (row of git_tree), but without encompassing <tr> element
4148 sub git_print_tree_entry {
4149         my ($t, $basedir, $hash_base, $have_blame) = @_;
4150
4151         my %base_key = ();
4152         $base_key{'hash_base'} = $hash_base if defined $hash_base;
4153
4154         # The format of a table row is: mode list link.  Where mode is
4155         # the mode of the entry, list is the name of the entry, an href,
4156         # and link is the action links of the entry.
4157
4158         print "<td class=\"mode\">" . mode_str($t->{'mode'}) . "</td>\n";
4159         if (exists $t->{'size'}) {
4160                 print "<td class=\"size\">$t->{'size'}</td>\n";
4161         }
4162         if ($t->{'type'} eq "blob") {
4163                 print "<td class=\"list\">" .
4164                         $cgi->a({-href => href(action=>"blob", hash=>$t->{'hash'},
4165                                                file_name=>"$basedir$t->{'name'}", %base_key),
4166                                 -class => "list"}, esc_path($t->{'name'}));
4167                 if (S_ISLNK(oct $t->{'mode'})) {
4168                         my $link_target = git_get_link_target($t->{'hash'});
4169                         if ($link_target) {
4170                                 my $norm_target = normalize_link_target($link_target, $basedir);
4171                                 if (defined $norm_target) {
4172                                         print " -> " .
4173                                               $cgi->a({-href => href(action=>"object", hash_base=>$hash_base,
4174                                                                      file_name=>$norm_target),
4175                                                        -title => $norm_target}, esc_path($link_target));
4176                                 } else {
4177                                         print " -> " . esc_path($link_target);
4178                                 }
4179                         }
4180                 }
4181                 print "</td>\n";
4182                 print "<td class=\"link\">";
4183                 print $cgi->a({-href => href(action=>"blob", hash=>$t->{'hash'},
4184                                              file_name=>"$basedir$t->{'name'}", %base_key)},
4185                               "blob");
4186                 if ($have_blame) {
4187                         print " | " .
4188                               $cgi->a({-href => href(action=>"blame", hash=>$t->{'hash'},
4189                                                      file_name=>"$basedir$t->{'name'}", %base_key)},
4190                                       "blame");
4191                 }
4192                 if (defined $hash_base) {
4193                         print " | " .
4194                               $cgi->a({-href => href(action=>"history", hash_base=>$hash_base,
4195                                                      hash=>$t->{'hash'}, file_name=>"$basedir$t->{'name'}")},
4196                                       "history");
4197                 }
4198                 print " | " .
4199                         $cgi->a({-href => href(action=>"blob_plain", hash_base=>$hash_base,
4200                                                file_name=>"$basedir$t->{'name'}")},
4201                                 "raw");
4202                 print "</td>\n";
4203
4204         } elsif ($t->{'type'} eq "tree") {
4205                 print "<td class=\"list\">";
4206                 print $cgi->a({-href => href(action=>"tree", hash=>$t->{'hash'},
4207                                              file_name=>"$basedir$t->{'name'}",
4208                                              %base_key)},
4209                               esc_path($t->{'name'}));
4210                 print "</td>\n";
4211                 print "<td class=\"link\">";
4212                 print $cgi->a({-href => href(action=>"tree", hash=>$t->{'hash'},
4213                                              file_name=>"$basedir$t->{'name'}",
4214                                              %base_key)},
4215                               "tree");
4216                 if (defined $hash_base) {
4217                         print " | " .
4218                               $cgi->a({-href => href(action=>"history", hash_base=>$hash_base,
4219                                                      file_name=>"$basedir$t->{'name'}")},
4220                                       "history");
4221                 }
4222                 print "</td>\n";
4223         } else {
4224                 # unknown object: we can only present history for it
4225                 # (this includes 'commit' object, i.e. submodule support)
4226                 print "<td class=\"list\">" .
4227                       esc_path($t->{'name'}) .
4228                       "</td>\n";
4229                 print "<td class=\"link\">";
4230                 if (defined $hash_base) {
4231                         print $cgi->a({-href => href(action=>"history",
4232                                                      hash_base=>$hash_base,
4233                                                      file_name=>"$basedir$t->{'name'}")},
4234                                       "history");
4235                 }
4236                 print "</td>\n";
4237         }
4238 }
4239
4240 ## ......................................................................
4241 ## functions printing large fragments of HTML
4242
4243 # get pre-image filenames for merge (combined) diff
4244 sub fill_from_file_info {
4245         my ($diff, @parents) = @_;
4246
4247         $diff->{'from_file'} = [ ];
4248         $diff->{'from_file'}[$diff->{'nparents'} - 1] = undef;
4249         for (my $i = 0; $i < $diff->{'nparents'}; $i++) {
4250                 if ($diff->{'status'}[$i] eq 'R' ||
4251                     $diff->{'status'}[$i] eq 'C') {
4252                         $diff->{'from_file'}[$i] =
4253                                 git_get_path_by_hash($parents[$i], $diff->{'from_id'}[$i]);
4254                 }
4255         }
4256
4257         return $diff;
4258 }
4259
4260 # is current raw difftree line of file deletion
4261 sub is_deleted {
4262         my $diffinfo = shift;
4263
4264         return $diffinfo->{'to_id'} eq ('0' x 40);
4265 }
4266
4267 # does patch correspond to [previous] difftree raw line
4268 # $diffinfo  - hashref of parsed raw diff format
4269 # $patchinfo - hashref of parsed patch diff format
4270 #              (the same keys as in $diffinfo)
4271 sub is_patch_split {
4272         my ($diffinfo, $patchinfo) = @_;
4273
4274         return defined $diffinfo && defined $patchinfo
4275                 && $diffinfo->{'to_file'} eq $patchinfo->{'to_file'};
4276 }
4277
4278
4279 sub git_difftree_body {
4280         my ($difftree, $hash, @parents) = @_;
4281         my ($parent) = $parents[0];
4282         my $have_blame = gitweb_check_feature('blame');
4283         print "<div class=\"list_head\">\n";
4284         if ($#{$difftree} > 10) {
4285                 print(($#{$difftree} + 1) . " files changed:\n");
4286         }
4287         print "</div>\n";
4288
4289         print "<table class=\"" .
4290               (@parents > 1 ? "combined " : "") .
4291               "diff_tree\">\n";
4292
4293         # header only for combined diff in 'commitdiff' view
4294         my $has_header = @$difftree && @parents > 1 && $action eq 'commitdiff';
4295         if ($has_header) {
4296                 # table header
4297                 print "<thead><tr>\n" .
4298                        "<th></th><th></th>\n"; # filename, patchN link
4299                 for (my $i = 0; $i < @parents; $i++) {
4300                         my $par = $parents[$i];
4301                         print "<th>" .
4302                               $cgi->a({-href => href(action=>"commitdiff",
4303                                                      hash=>$hash, hash_parent=>$par),
4304                                        -title => 'commitdiff to parent number ' .
4305                                                   ($i+1) . ': ' . substr($par,0,7)},
4306                                       $i+1) .
4307                               "&nbsp;</th>\n";
4308                 }
4309                 print "</tr></thead>\n<tbody>\n";
4310         }
4311
4312         my $alternate = 1;
4313         my $patchno = 0;
4314         foreach my $line (@{$difftree}) {
4315                 my $diff = parsed_difftree_line($line);
4316
4317                 if ($alternate) {
4318                         print "<tr class=\"dark\">\n";
4319                 } else {
4320                         print "<tr class=\"light\">\n";
4321                 }
4322                 $alternate ^= 1;
4323
4324                 if (exists $diff->{'nparents'}) { # combined diff
4325
4326                         fill_from_file_info($diff, @parents)
4327                                 unless exists $diff->{'from_file'};
4328
4329                         if (!is_deleted($diff)) {
4330                                 # file exists in the result (child) commit
4331                                 print "<td>" .
4332                                       $cgi->a({-href => href(action=>"blob", hash=>$diff->{'to_id'},
4333                                                              file_name=>$diff->{'to_file'},
4334                                                              hash_base=>$hash),
4335                                               -class => "list"}, esc_path($diff->{'to_file'})) .
4336                                       "</td>\n";
4337                         } else {
4338                                 print "<td>" .
4339                                       esc_path($diff->{'to_file'}) .
4340                                       "</td>\n";
4341                         }
4342
4343                         if ($action eq 'commitdiff') {
4344                                 # link to patch
4345                                 $patchno++;
4346                                 print "<td class=\"link\">" .
4347                                       $cgi->a({-href => href(-anchor=>"patch$patchno")},
4348                                               "patch") .
4349                                       " | " .
4350                                       "</td>\n";
4351                         }
4352
4353                         my $has_history = 0;
4354                         my $not_deleted = 0;
4355                         for (my $i = 0; $i < $diff->{'nparents'}; $i++) {
4356                                 my $hash_parent = $parents[$i];
4357                                 my $from_hash = $diff->{'from_id'}[$i];
4358                                 my $from_path = $diff->{'from_file'}[$i];
4359                                 my $status = $diff->{'status'}[$i];
4360
4361                                 $has_history ||= ($status ne 'A');
4362                                 $not_deleted ||= ($status ne 'D');
4363
4364                                 if ($status eq 'A') {
4365                                         print "<td  class=\"link\" align=\"right\"> | </td>\n";
4366                                 } elsif ($status eq 'D') {
4367                                         print "<td class=\"link\">" .
4368                                               $cgi->a({-href => href(action=>"blob",
4369                                                                      hash_base=>$hash,
4370                                                                      hash=>$from_hash,
4371                                                                      file_name=>$from_path)},
4372                                                       "blob" . ($i+1)) .
4373                                               " | </td>\n";
4374                                 } else {
4375                                         if ($diff->{'to_id'} eq $from_hash) {
4376                                                 print "<td class=\"link nochange\">";
4377                                         } else {
4378                                                 print "<td class=\"link\">";
4379                                         }
4380                                         print $cgi->a({-href => href(action=>"blobdiff",
4381                                                                      hash=>$diff->{'to_id'},
4382                                                                      hash_parent=>$from_hash,
4383                                                                      hash_base=>$hash,
4384                                                                      hash_parent_base=>$hash_parent,
4385                                                                      file_name=>$diff->{'to_file'},
4386                                                                      file_parent=>$from_path)},
4387                                                       "diff" . ($i+1)) .
4388                                               " | </td>\n";
4389                                 }
4390                         }
4391
4392                         print "<td class=\"link\">";
4393                         if ($not_deleted) {
4394                                 print $cgi->a({-href => href(action=>"blob",
4395                                                              hash=>$diff->{'to_id'},
4396                                                              file_name=>$diff->{'to_file'},
4397                                                              hash_base=>$hash)},
4398                                               "blob");
4399                                 print " | " if ($has_history);
4400                         }
4401                         if ($has_history) {
4402                                 print $cgi->a({-href => href(action=>"history",
4403                                                              file_name=>$diff->{'to_file'},
4404                                                              hash_base=>$hash)},
4405                                               "history");
4406                         }
4407                         print "</td>\n";
4408
4409                         print "</tr>\n";
4410                         next; # instead of 'else' clause, to avoid extra indent
4411                 }
4412                 # else ordinary diff
4413
4414                 my ($to_mode_oct, $to_mode_str, $to_file_type);
4415                 my ($from_mode_oct, $from_mode_str, $from_file_type);
4416                 if ($diff->{'to_mode'} ne ('0' x 6)) {
4417                         $to_mode_oct = oct $diff->{'to_mode'};
4418                         if (S_ISREG($to_mode_oct)) { # only for regular file
4419                                 $to_mode_str = sprintf("%04o", $to_mode_oct & 0777); # permission bits
4420                         }
4421                         $to_file_type = file_type($diff->{'to_mode'});
4422                 }
4423                 if ($diff->{'from_mode'} ne ('0' x 6)) {
4424                         $from_mode_oct = oct $diff->{'from_mode'};
4425                         if (S_ISREG($from_mode_oct)) { # only for regular file
4426                                 $from_mode_str = sprintf("%04o", $from_mode_oct & 0777); # permission bits
4427                         }
4428                         $from_file_type = file_type($diff->{'from_mode'});
4429                 }
4430
4431                 if ($diff->{'status'} eq "A") { # created
4432                         my $mode_chng = "<span class=\"file_status new\">[new $to_file_type";
4433                         $mode_chng   .= " with mode: $to_mode_str" if $to_mode_str;
4434                         $mode_chng   .= "]</span>";
4435                         print "<td>";
4436                         print $cgi->a({-href => href(action=>"blob", hash=>$diff->{'to_id'},
4437                                                      hash_base=>$hash, file_name=>$diff->{'file'}),
4438                                       -class => "list"}, esc_path($diff->{'file'}));
4439                         print "</td>\n";
4440                         print "<td>$mode_chng</td>\n";
4441                         print "<td class=\"link\">";
4442                         if ($action eq 'commitdiff') {
4443                                 # link to patch
4444                                 $patchno++;
4445                                 print $cgi->a({-href => href(-anchor=>"patch$patchno")},
4446                                               "patch") .
4447                                       " | ";
4448                         }
4449                         print $cgi->a({-href => href(action=>"blob", hash=>$diff->{'to_id'},
4450                                                      hash_base=>$hash, file_name=>$diff->{'file'})},
4451                                       "blob");
4452                         print "</td>\n";
4453
4454                 } elsif ($diff->{'status'} eq "D") { # deleted
4455                         my $mode_chng = "<span class=\"file_status deleted\">[deleted $from_file_type]</span>";
4456                         print "<td>";
4457                         print $cgi->a({-href => href(action=>"blob", hash=>$diff->{'from_id'},
4458                                                      hash_base=>$parent, file_name=>$diff->{'file'}),
4459                                        -class => "list"}, esc_path($diff->{'file'}));
4460                         print "</td>\n";
4461                         print "<td>$mode_chng</td>\n";
4462                         print "<td class=\"link\">";
4463                         if ($action eq 'commitdiff') {
4464                                 # link to patch
4465                                 $patchno++;
4466                                 print $cgi->a({-href => href(-anchor=>"patch$patchno")},
4467                                               "patch") .
4468                                       " | ";
4469                         }
4470                         print $cgi->a({-href => href(action=>"blob", hash=>$diff->{'from_id'},
4471                                                      hash_base=>$parent, file_name=>$diff->{'file'})},
4472                                       "blob") . " | ";
4473                         if ($have_blame) {
4474                                 print $cgi->a({-href => href(action=>"blame", hash_base=>$parent,
4475                                                              file_name=>$diff->{'file'})},
4476                                               "blame") . " | ";
4477                         }
4478                         print $cgi->a({-href => href(action=>"history", hash_base=>$parent,
4479                                                      file_name=>$diff->{'file'})},
4480                                       "history");
4481                         print "</td>\n";
4482
4483                 } elsif ($diff->{'status'} eq "M" || $diff->{'status'} eq "T") { # modified, or type changed
4484                         my $mode_chnge = "";
4485                         if ($diff->{'from_mode'} != $diff->{'to_mode'}) {
4486                                 $mode_chnge = "<span class=\"file_status mode_chnge\">[changed";
4487                                 if ($from_file_type ne $to_file_type) {
4488                                         $mode_chnge .= " from $from_file_type to $to_file_type";
4489                                 }
4490                                 if (($from_mode_oct & 0777) != ($to_mode_oct & 0777)) {
4491                                         if ($from_mode_str && $to_mode_str) {
4492                                                 $mode_chnge .= " mode: $from_mode_str->$to_mode_str";
4493                                         } elsif ($to_mode_str) {
4494                                                 $mode_chnge .= " mode: $to_mode_str";
4495                                         }
4496                                 }
4497                                 $mode_chnge .= "]</span>\n";
4498                         }
4499                         print "<td>";
4500                         print $cgi->a({-href => href(action=>"blob", hash=>$diff->{'to_id'},
4501                                                      hash_base=>$hash, file_name=>$diff->{'file'}),
4502                                       -class => "list"}, esc_path($diff->{'file'}));
4503                         print "</td>\n";
4504                         print "<td>$mode_chnge</td>\n";
4505                         print "<td class=\"link\">";
4506                         if ($action eq 'commitdiff') {
4507                                 # link to patch
4508                                 $patchno++;
4509                                 print $cgi->a({-href => href(-anchor=>"patch$patchno")},
4510                                               "patch") .
4511                                       " | ";
4512                         } elsif ($diff->{'to_id'} ne $diff->{'from_id'}) {
4513                                 # "commit" view and modified file (not onlu mode changed)
4514                                 print $cgi->a({-href => href(action=>"blobdiff",
4515                                                              hash=>$diff->{'to_id'}, hash_parent=>$diff->{'from_id'},
4516                                                              hash_base=>$hash, hash_parent_base=>$parent,
4517                                                              file_name=>$diff->{'file'})},
4518                                               "diff") .
4519                                       " | ";
4520                         }
4521                         print $cgi->a({-href => href(action=>"blob", hash=>$diff->{'to_id'},
4522                                                      hash_base=>$hash, file_name=>$diff->{'file'})},
4523                                        "blob") . " | ";
4524                         if ($have_blame) {
4525                                 print $cgi->a({-href => href(action=>"blame", hash_base=>$hash,
4526                                                              file_name=>$diff->{'file'})},
4527                                               "blame") . " | ";
4528                         }
4529                         print $cgi->a({-href => href(action=>"history", hash_base=>$hash,
4530                                                      file_name=>$diff->{'file'})},
4531                                       "history");
4532                         print "</td>\n";
4533
4534                 } elsif ($diff->{'status'} eq "R" || $diff->{'status'} eq "C") { # renamed or copied
4535                         my %status_name = ('R' => 'moved', 'C' => 'copied');
4536                         my $nstatus = $status_name{$diff->{'status'}};
4537                         my $mode_chng = "";
4538                         if ($diff->{'from_mode'} != $diff->{'to_mode'}) {
4539                                 # mode also for directories, so we cannot use $to_mode_str
4540                                 $mode_chng = sprintf(", mode: %04o", $to_mode_oct & 0777);
4541                         }
4542                         print "<td>" .
4543                               $cgi->a({-href => href(action=>"blob", hash_base=>$hash,
4544                                                      hash=>$diff->{'to_id'}, file_name=>$diff->{'to_file'}),
4545                                       -class => "list"}, esc_path($diff->{'to_file'})) . "</td>\n" .
4546                               "<td><span class=\"file_status $nstatus\">[$nstatus from " .
4547                               $cgi->a({-href => href(action=>"blob", hash_base=>$parent,
4548                                                      hash=>$diff->{'from_id'}, file_name=>$diff->{'from_file'}),
4549                                       -class => "list"}, esc_path($diff->{'from_file'})) .
4550                               " with " . (int $diff->{'similarity'}) . "% similarity$mode_chng]</span></td>\n" .
4551                               "<td class=\"link\">";
4552                         if ($action eq 'commitdiff') {
4553                                 # link to patch
4554                                 $patchno++;
4555                                 print $cgi->a({-href => href(-anchor=>"patch$patchno")},
4556                                               "patch") .
4557                                       " | ";
4558                         } elsif ($diff->{'to_id'} ne $diff->{'from_id'}) {
4559                                 # "commit" view and modified file (not only pure rename or copy)
4560                                 print $cgi->a({-href => href(action=>"blobdiff",
4561                                                              hash=>$diff->{'to_id'}, hash_parent=>$diff->{'from_id'},
4562                                                              hash_base=>$hash, hash_parent_base=>$parent,
4563                                                              file_name=>$diff->{'to_file'}, file_parent=>$diff->{'from_file'})},
4564                                               "diff") .
4565                                       " | ";
4566                         }
4567                         print $cgi->a({-href => href(action=>"blob", hash=>$diff->{'to_id'},
4568                                                      hash_base=>$parent, file_name=>$diff->{'to_file'})},
4569                                       "blob") . " | ";
4570                         if ($have_blame) {
4571                                 print $cgi->a({-href => href(action=>"blame", hash_base=>$hash,
4572                                                              file_name=>$diff->{'to_file'})},
4573                                               "blame") . " | ";
4574                         }
4575                         print $cgi->a({-href => href(action=>"history", hash_base=>$hash,
4576                                                     file_name=>$diff->{'to_file'})},
4577                                       "history");
4578                         print "</td>\n";
4579
4580                 } # we should not encounter Unmerged (U) or Unknown (X) status
4581                 print "</tr>\n";
4582         }
4583         print "</tbody>" if $has_header;
4584         print "</table>\n";
4585 }
4586
4587 sub git_patchset_body {
4588         my ($fd, $difftree, $hash, @hash_parents) = @_;
4589         my ($hash_parent) = $hash_parents[0];
4590
4591         my $is_combined = (@hash_parents > 1);
4592         my $patch_idx = 0;
4593         my $patch_number = 0;
4594         my $patch_line;
4595         my $diffinfo;
4596         my $to_name;
4597         my (%from, %to);
4598
4599         print "<div class=\"patchset\">\n";
4600
4601         # skip to first patch
4602         while ($patch_line = <$fd>) {
4603                 chomp $patch_line;
4604
4605                 last if ($patch_line =~ m/^diff /);
4606         }
4607
4608  PATCH:
4609         while ($patch_line) {
4610
4611                 # parse "git diff" header line
4612                 if ($patch_line =~ m/^diff --git (\"(?:[^\\\"]*(?:\\.[^\\\"]*)*)\"|[^ "]*) (.*)$/) {
4613                         # $1 is from_name, which we do not use
4614                         $to_name = unquote($2);
4615                         $to_name =~ s!^b/!!;
4616                 } elsif ($patch_line =~ m/^diff --(cc|combined) ("?.*"?)$/) {
4617                         # $1 is 'cc' or 'combined', which we do not use
4618                         $to_name = unquote($2);
4619                 } else {
4620                         $to_name = undef;
4621                 }
4622
4623                 # check if current patch belong to current raw line
4624                 # and parse raw git-diff line if needed
4625                 if (is_patch_split($diffinfo, { 'to_file' => $to_name })) {
4626                         # this is continuation of a split patch
4627                         print "<div class=\"patch cont\">\n";
4628                 } else {
4629                         # advance raw git-diff output if needed
4630                         $patch_idx++ if defined $diffinfo;
4631
4632                         # read and prepare patch information
4633                         $diffinfo = parsed_difftree_line($difftree->[$patch_idx]);
4634
4635                         # compact combined diff output can have some patches skipped
4636                         # find which patch (using pathname of result) we are at now;
4637                         if ($is_combined) {
4638                                 while ($to_name ne $diffinfo->{'to_file'}) {
4639                                         print "<div class=\"patch\" id=\"patch". ($patch_idx+1) ."\">\n" .
4640                                               format_diff_cc_simplified($diffinfo, @hash_parents) .
4641                                               "</div>\n";  # class="patch"
4642
4643                                         $patch_idx++;
4644                                         $patch_number++;
4645
4646                                         last if $patch_idx > $#$difftree;
4647                                         $diffinfo = parsed_difftree_line($difftree->[$patch_idx]);
4648                                 }
4649                         }
4650
4651                         # modifies %from, %to hashes
4652                         parse_from_to_diffinfo($diffinfo, \%from, \%to, @hash_parents);
4653
4654                         # this is first patch for raw difftree line with $patch_idx index
4655                         # we index @$difftree array from 0, but number patches from 1
4656                         print "<div class=\"patch\" id=\"patch". ($patch_idx+1) ."\">\n";
4657                 }
4658
4659                 # git diff header
4660                 #assert($patch_line =~ m/^diff /) if DEBUG;
4661                 #assert($patch_line !~ m!$/$!) if DEBUG; # is chomp-ed
4662                 $patch_number++;
4663                 # print "git diff" header
4664                 print format_git_diff_header_line($patch_line, $diffinfo,
4665                                                   \%from, \%to);
4666
4667                 # print extended diff header
4668                 print "<div class=\"diff extended_header\">\n";
4669         EXTENDED_HEADER:
4670                 while ($patch_line = <$fd>) {
4671                         chomp $patch_line;
4672
4673                         last EXTENDED_HEADER if ($patch_line =~ m/^--- |^diff /);
4674
4675                         print format_extended_diff_header_line($patch_line, $diffinfo,
4676                                                                \%from, \%to);
4677                 }
4678                 print "</div>\n"; # class="diff extended_header"
4679
4680                 # from-file/to-file diff header
4681                 if (! $patch_line) {
4682                         print "</div>\n"; # class="patch"
4683                         last PATCH;
4684                 }
4685                 next PATCH if ($patch_line =~ m/^diff /);
4686                 #assert($patch_line =~ m/^---/) if DEBUG;
4687
4688                 my $last_patch_line = $patch_line;
4689                 $patch_line = <$fd>;
4690                 chomp $patch_line;
4691                 #assert($patch_line =~ m/^\+\+\+/) if DEBUG;
4692
4693                 print format_diff_from_to_header($last_patch_line, $patch_line,
4694                                                  $diffinfo, \%from, \%to,
4695                                                  @hash_parents);
4696
4697                 # the patch itself
4698         LINE:
4699                 while ($patch_line = <$fd>) {
4700                         chomp $patch_line;
4701
4702                         next PATCH if ($patch_line =~ m/^diff /);
4703
4704                         print format_diff_line($patch_line, \%from, \%to);
4705                 }
4706
4707         } continue {
4708                 print "</div>\n"; # class="patch"
4709         }
4710
4711         # for compact combined (--cc) format, with chunk and patch simplification
4712         # the patchset might be empty, but there might be unprocessed raw lines
4713         for (++$patch_idx if $patch_number > 0;
4714              $patch_idx < @$difftree;
4715              ++$patch_idx) {
4716                 # read and prepare patch information
4717                 $diffinfo = parsed_difftree_line($difftree->[$patch_idx]);
4718
4719                 # generate anchor for "patch" links in difftree / whatchanged part
4720                 print "<div class=\"patch\" id=\"patch". ($patch_idx+1) ."\">\n" .
4721                       format_diff_cc_simplified($diffinfo, @hash_parents) .
4722                       "</div>\n";  # class="patch"
4723
4724                 $patch_number++;
4725         }
4726
4727         if ($patch_number == 0) {
4728                 if (@hash_parents > 1) {
4729                         print "<div class=\"diff nodifferences\">Trivial merge</div>\n";
4730                 } else {
4731                         print "<div class=\"diff nodifferences\">No differences found</div>\n";
4732                 }
4733         }
4734
4735         print "</div>\n"; # class="patchset"
4736 }
4737
4738 # . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
4739
4740 # fills project list info (age, description, owner, forks) for each
4741 # project in the list, removing invalid projects from returned list
4742 # NOTE: modifies $projlist, but does not remove entries from it
4743 sub fill_project_list_info {
4744         my ($projlist, $check_forks) = @_;
4745         my @projects;
4746
4747         my $show_ctags = gitweb_check_feature('ctags');
4748  PROJECT:
4749         foreach my $pr (@$projlist) {
4750                 my (@activity) = git_get_last_activity($pr->{'path'});
4751                 unless (@activity) {
4752                         next PROJECT;
4753                 }
4754                 ($pr->{'age'}, $pr->{'age_string'}) = @activity;
4755                 if (!defined $pr->{'descr'}) {
4756                         my $descr = git_get_project_description($pr->{'path'}) || "";
4757                         $descr = to_utf8($descr);
4758                         $pr->{'descr_long'} = $descr;
4759                         $pr->{'descr'} = chop_str($descr, $projects_list_description_width, 5);
4760                 }
4761                 if (!defined $pr->{'owner'}) {
4762                         $pr->{'owner'} = git_get_project_owner("$pr->{'path'}") || "";
4763                 }
4764                 if ($check_forks) {
4765                         my $pname = $pr->{'path'};
4766                         if (($pname =~ s/\.git$//) &&
4767                             ($pname !~ /\/$/) &&
4768                             (-d "$projectroot/$pname")) {
4769                                 $pr->{'forks'} = "-d $projectroot/$pname";
4770                         } else {
4771                                 $pr->{'forks'} = 0;
4772                         }
4773                 }
4774                 $show_ctags and $pr->{'ctags'} = git_get_project_ctags($pr->{'path'});
4775                 push @projects, $pr;
4776         }
4777
4778         return @projects;
4779 }
4780
4781 # print 'sort by' <th> element, generating 'sort by $name' replay link
4782 # if that order is not selected
4783 sub print_sort_th {
4784         print format_sort_th(@_);
4785 }
4786
4787 sub format_sort_th {
4788         my ($name, $order, $header) = @_;
4789         my $sort_th = "";
4790         $header ||= ucfirst($name);
4791
4792         if ($order eq $name) {
4793                 $sort_th .= "<th>$header</th>\n";
4794         } else {
4795                 $sort_th .= "<th>" .
4796                             $cgi->a({-href => href(-replay=>1, order=>$name),
4797                                      -class => "header"}, $header) .
4798                             "</th>\n";
4799         }
4800
4801         return $sort_th;
4802 }
4803
4804 sub git_project_list_body {
4805         # actually uses global variable $project
4806         my ($projlist, $order, $from, $to, $extra, $no_header) = @_;
4807
4808         my $check_forks = gitweb_check_feature('forks');
4809         my @projects = fill_project_list_info($projlist, $check_forks);
4810
4811         $order ||= $default_projects_order;
4812         $from = 0 unless defined $from;
4813         $to = $#projects if (!defined $to || $#projects < $to);
4814
4815         my %order_info = (
4816                 project => { key => 'path', type => 'str' },
4817                 descr => { key => 'descr_long', type => 'str' },
4818                 owner => { key => 'owner', type => 'str' },
4819                 age => { key => 'age', type => 'num' }
4820         );
4821         my $oi = $order_info{$order};
4822         if ($oi->{'type'} eq 'str') {
4823                 @projects = sort {$a->{$oi->{'key'}} cmp $b->{$oi->{'key'}}} @projects;
4824         } else {
4825                 @projects = sort {$a->{$oi->{'key'}} <=> $b->{$oi->{'key'}}} @projects;
4826         }
4827
4828         my $show_ctags = gitweb_check_feature('ctags');
4829         if ($show_ctags) {
4830                 my %ctags;
4831                 foreach my $p (@projects) {
4832                         foreach my $ct (keys %{$p->{'ctags'}}) {
4833                                 $ctags{$ct} += $p->{'ctags'}->{$ct};
4834                         }
4835                 }
4836                 my $cloud = git_populate_project_tagcloud(\%ctags);
4837                 print git_show_project_tagcloud($cloud, 64);
4838         }
4839
4840         print "<table class=\"project_list\">\n";
4841         unless ($no_header) {
4842                 print "<tr>\n";
4843                 if ($check_forks) {
4844                         print "<th></th>\n";
4845                 }
4846                 print_sort_th('project', $order, 'Project');
4847                 print_sort_th('descr', $order, 'Description');
4848                 print_sort_th('owner', $order, 'Owner');
4849                 print_sort_th('age', $order, 'Last Change');
4850                 print "<th></th>\n" . # for links
4851                       "</tr>\n";
4852         }
4853         my $alternate = 1;
4854         my $tagfilter = $cgi->param('by_tag');
4855         for (my $i = $from; $i <= $to; $i++) {
4856                 my $pr = $projects[$i];
4857
4858                 next if $tagfilter and $show_ctags and not grep { lc $_ eq lc $tagfilter } keys %{$pr->{'ctags'}};
4859                 next if $searchtext and not $pr->{'path'} =~ /$searchtext/
4860                         and not $pr->{'descr_long'} =~ /$searchtext/;
4861                 # Weed out forks or non-matching entries of search
4862                 if ($check_forks) {
4863                         my $forkbase = $project; $forkbase ||= ''; $forkbase =~ s#\.git$#/#;
4864                         $forkbase="^$forkbase" if $forkbase;
4865                         next if not $searchtext and not $tagfilter and $show_ctags
4866                                 and $pr->{'path'} =~ m#$forkbase.*/.*#; # regexp-safe
4867                 }
4868
4869                 if ($alternate) {
4870                         print "<tr class=\"dark\">\n";
4871                 } else {
4872                         print "<tr class=\"light\">\n";
4873                 }
4874                 $alternate ^= 1;
4875                 if ($check_forks) {
4876                         print "<td>";
4877                         if ($pr->{'forks'}) {
4878                                 print "<!-- $pr->{'forks'} -->\n";
4879                                 print $cgi->a({-href => href(project=>$pr->{'path'}, action=>"forks")}, "+");
4880                         }
4881                         print "</td>\n";
4882                 }
4883                 print "<td>" . $cgi->a({-href => href(project=>$pr->{'path'}, action=>"summary"),
4884                                         -class => "list"}, esc_html($pr->{'path'})) . "</td>\n" .
4885                       "<td>" . $cgi->a({-href => href(project=>$pr->{'path'}, action=>"summary"),
4886                                         -class => "list", -title => $pr->{'descr_long'}},
4887                                         esc_html($pr->{'descr'})) . "</td>\n" .
4888                       "<td><i>" . chop_and_escape_str($pr->{'owner'}, 15) . "</i></td>\n";
4889                 print "<td class=\"". age_class($pr->{'age'}) . "\">" .
4890                       (defined $pr->{'age_string'} ? $pr->{'age_string'} : "No commits") . "</td>\n" .
4891                       "<td class=\"link\">" .
4892                       $cgi->a({-href => href(project=>$pr->{'path'}, action=>"summary")}, "summary")   . " | " .
4893                       $cgi->a({-href => href(project=>$pr->{'path'}, action=>"shortlog")}, "shortlog") . " | " .
4894                       $cgi->a({-href => href(project=>$pr->{'path'}, action=>"log")}, "log") . " | " .
4895                       $cgi->a({-href => href(project=>$pr->{'path'}, action=>"tree")}, "tree") .
4896                       ($pr->{'forks'} ? " | " . $cgi->a({-href => href(project=>$pr->{'path'}, action=>"forks")}, "forks") : '') .
4897                       "</td>\n" .
4898                       "</tr>\n";
4899         }
4900         if (defined $extra) {
4901                 print "<tr>\n";
4902                 if ($check_forks) {
4903                         print "<td></td>\n";
4904                 }
4905                 print "<td colspan=\"5\">$extra</td>\n" .
4906                       "</tr>\n";
4907         }
4908         print "</table>\n";
4909 }
4910
4911 sub git_log_body {
4912         # uses global variable $project
4913         my ($commitlist, $from, $to, $refs, $extra) = @_;
4914
4915         $from = 0 unless defined $from;
4916         $to = $#{$commitlist} if (!defined $to || $#{$commitlist} < $to);
4917
4918         for (my $i = 0; $i <= $to; $i++) {
4919                 my %co = %{$commitlist->[$i]};
4920                 next if !%co;
4921                 my $commit = $co{'id'};
4922                 my $ref = format_ref_marker($refs, $commit);
4923                 git_print_header_div('commit',
4924                                "<span class=\"age\">$co{'age_string'}</span>" .
4925                                esc_html($co{'title'}) . $ref,
4926                                $commit);
4927                 print "<div class=\"title_text\">\n" .
4928                       "<div class=\"log_link\">\n" .
4929                       $cgi->a({-href => href(action=>"commit", hash=>$commit)}, "commit") .
4930                       " | " .
4931                       $cgi->a({-href => href(action=>"commitdiff", hash=>$commit)}, "commitdiff") .
4932                       " | " .
4933                       $cgi->a({-href => href(action=>"tree", hash=>$commit, hash_base=>$commit)}, "tree") .
4934                       "<br/>\n" .
4935                       "</div>\n";
4936                       git_print_authorship(\%co, -tag => 'span');
4937                       print "<br/>\n</div>\n";
4938
4939                 print "<div class=\"log_body\">\n";
4940                 git_print_log($co{'comment'}, -final_empty_line=> 1);
4941                 print "</div>\n";
4942         }
4943         if ($extra) {
4944                 print "<div class=\"page_nav\">\n";
4945                 print "$extra\n";
4946                 print "</div>\n";
4947         }
4948 }
4949
4950 sub git_shortlog_body {
4951         # uses global variable $project
4952         my ($commitlist, $from, $to, $refs, $extra) = @_;
4953
4954         $from = 0 unless defined $from;
4955         $to = $#{$commitlist} if (!defined $to || $#{$commitlist} < $to);
4956
4957         print "<table class=\"shortlog\">\n";
4958         my $alternate = 1;
4959         for (my $i = $from; $i <= $to; $i++) {
4960                 my %co = %{$commitlist->[$i]};
4961                 my $commit = $co{'id'};
4962                 my $ref = format_ref_marker($refs, $commit);
4963                 if ($alternate) {
4964                         print "<tr class=\"dark\">\n";
4965                 } else {
4966                         print "<tr class=\"light\">\n";
4967                 }
4968                 $alternate ^= 1;
4969                 # git_summary() used print "<td><i>$co{'age_string'}</i></td>\n" .
4970                 print "<td title=\"$co{'age_string_age'}\"><i>$co{'age_string_date'}</i></td>\n" .
4971                       format_author_html('td', \%co, 10) . "<td>";
4972                 print format_subject_html($co{'title'}, $co{'title_short'},
4973                                           href(action=>"commit", hash=>$commit), $ref);
4974                 print "</td>\n" .
4975                       "<td class=\"link\">" .
4976                       $cgi->a({-href => href(action=>"commit", hash=>$commit)}, "commit") . " | " .
4977                       $cgi->a({-href => href(action=>"commitdiff", hash=>$commit)}, "commitdiff") . " | " .
4978                       $cgi->a({-href => href(action=>"tree", hash=>$commit, hash_base=>$commit)}, "tree");
4979                 my $snapshot_links = format_snapshot_links($commit);
4980                 if (defined $snapshot_links) {
4981                         print " | " . $snapshot_links;
4982                 }
4983                 print "</td>\n" .
4984                       "</tr>\n";
4985         }
4986         if (defined $extra) {
4987                 print "<tr>\n" .
4988                       "<td colspan=\"4\">$extra</td>\n" .
4989                       "</tr>\n";
4990         }
4991         print "</table>\n";
4992 }
4993
4994 sub git_history_body {
4995         # Warning: assumes constant type (blob or tree) during history
4996         my ($commitlist, $from, $to, $refs, $extra,
4997             $file_name, $file_hash, $ftype) = @_;
4998
4999         $from = 0 unless defined $from;
5000         $to = $#{$commitlist} unless (defined $to && $to <= $#{$commitlist});
5001
5002         print "<table class=\"history\">\n";
5003         my $alternate = 1;
5004         for (my $i = $from; $i <= $to; $i++) {
5005                 my %co = %{$commitlist->[$i]};
5006                 if (!%co) {
5007                         next;
5008                 }
5009                 my $commit = $co{'id'};
5010
5011                 my $ref = format_ref_marker($refs, $commit);
5012
5013                 if ($alternate) {
5014                         print "<tr class=\"dark\">\n";
5015                 } else {
5016                         print "<tr class=\"light\">\n";
5017                 }
5018                 $alternate ^= 1;
5019                 print "<td title=\"$co{'age_string_age'}\"><i>$co{'age_string_date'}</i></td>\n" .
5020         # shortlog:   format_author_html('td', \%co, 10)
5021                       format_author_html('td', \%co, 15, 3) . "<td>";
5022                 # originally git_history used chop_str($co{'title'}, 50)
5023                 print format_subject_html($co{'title'}, $co{'title_short'},
5024                                           href(action=>"commit", hash=>$commit), $ref);
5025                 print "</td>\n" .
5026                       "<td class=\"link\">" .
5027                       $cgi->a({-href => href(action=>$ftype, hash_base=>$commit, file_name=>$file_name)}, $ftype) . " | " .
5028                       $cgi->a({-href => href(action=>"commitdiff", hash=>$commit)}, "commitdiff");
5029
5030                 if ($ftype eq 'blob') {
5031                         my $blob_current = $file_hash;
5032                         my $blob_parent  = git_get_hash_by_path($commit, $file_name);
5033                         if (defined $blob_current && defined $blob_parent &&
5034                                         $blob_current ne $blob_parent) {
5035                                 print " | " .
5036                                         $cgi->a({-href => href(action=>"blobdiff",
5037                                                                hash=>$blob_current, hash_parent=>$blob_parent,
5038                                                                hash_base=>$hash_base, hash_parent_base=>$commit,
5039                                                                file_name=>$file_name)},
5040                                                 "diff to current");
5041                         }
5042                 }
5043                 print "</td>\n" .
5044                       "</tr>\n";
5045         }
5046         if (defined $extra) {
5047                 print "<tr>\n" .
5048                       "<td colspan=\"4\">$extra</td>\n" .
5049                       "</tr>\n";
5050         }
5051         print "</table>\n";
5052 }
5053
5054 sub git_tags_body {
5055         # uses global variable $project
5056         my ($taglist, $from, $to, $extra) = @_;
5057         $from = 0 unless defined $from;
5058         $to = $#{$taglist} if (!defined $to || $#{$taglist} < $to);
5059
5060         print "<table class=\"tags\">\n";
5061         my $alternate = 1;
5062         for (my $i = $from; $i <= $to; $i++) {
5063                 my $entry = $taglist->[$i];
5064                 my %tag = %$entry;
5065                 my $comment = $tag{'subject'};
5066                 my $comment_short;
5067                 if (defined $comment) {
5068                         $comment_short = chop_str($comment, 30, 5);
5069                 }
5070                 if ($alternate) {
5071                         print "<tr class=\"dark\">\n";
5072                 } else {
5073                         print "<tr class=\"light\">\n";
5074                 }
5075                 $alternate ^= 1;
5076                 if (defined $tag{'age'}) {
5077                         print "<td><i>$tag{'age'}</i></td>\n";
5078                 } else {
5079                         print "<td></td>\n";
5080                 }
5081                 print "<td>" .
5082                       $cgi->a({-href => href(action=>$tag{'reftype'}, hash=>$tag{'refid'}),
5083                                -class => "list name"}, esc_html($tag{'name'})) .
5084                       "</td>\n" .
5085                       "<td>";
5086                 if (defined $comment) {
5087                         print format_subject_html($comment, $comment_short,
5088                                                   href(action=>"tag", hash=>$tag{'id'}));
5089                 }
5090                 print "</td>\n" .
5091                       "<td class=\"selflink\">";
5092                 if ($tag{'type'} eq "tag") {
5093                         print $cgi->a({-href => href(action=>"tag", hash=>$tag{'id'})}, "tag");
5094                 } else {
5095                         print "&nbsp;";
5096                 }
5097                 print "</td>\n" .
5098                       "<td class=\"link\">" . " | " .
5099                       $cgi->a({-href => href(action=>$tag{'reftype'}, hash=>$tag{'refid'})}, $tag{'reftype'});
5100                 if ($tag{'reftype'} eq "commit") {
5101                         print " | " . $cgi->a({-href => href(action=>"shortlog", hash=>$tag{'fullname'})}, "shortlog") .
5102                               " | " . $cgi->a({-href => href(action=>"log", hash=>$tag{'fullname'})}, "log");
5103                 } elsif ($tag{'reftype'} eq "blob") {
5104                         print " | " . $cgi->a({-href => href(action=>"blob_plain", hash=>$tag{'refid'})}, "raw");
5105                 }
5106                 print "</td>\n" .
5107                       "</tr>";
5108         }
5109         if (defined $extra) {
5110                 print "<tr>\n" .
5111                       "<td colspan=\"5\">$extra</td>\n" .
5112                       "</tr>\n";
5113         }
5114         print "</table>\n";
5115 }
5116
5117 sub git_heads_body {
5118         # uses global variable $project
5119         my ($headlist, $head, $from, $to, $extra) = @_;
5120         $from = 0 unless defined $from;
5121         $to = $#{$headlist} if (!defined $to || $#{$headlist} < $to);
5122
5123         print "<table class=\"heads\">\n";
5124         my $alternate = 1;
5125         for (my $i = $from; $i <= $to; $i++) {
5126                 my $entry = $headlist->[$i];
5127                 my %ref = %$entry;
5128                 my $curr = $ref{'id'} eq $head;
5129                 if ($alternate) {
5130                         print "<tr class=\"dark\">\n";
5131                 } else {
5132                         print "<tr class=\"light\">\n";
5133                 }
5134                 $alternate ^= 1;
5135                 print "<td><i>$ref{'age'}</i></td>\n" .
5136                       ($curr ? "<td class=\"current_head\">" : "<td>") .
5137                       $cgi->a({-href => href(action=>"shortlog", hash=>$ref{'fullname'}),
5138                                -class => "list name"},esc_html($ref{'name'})) .
5139                       "</td>\n" .
5140                       "<td class=\"link\">" .
5141                       $cgi->a({-href => href(action=>"shortlog", hash=>$ref{'fullname'})}, "shortlog") . " | " .
5142                       $cgi->a({-href => href(action=>"log", hash=>$ref{'fullname'})}, "log") . " | " .
5143                       $cgi->a({-href => href(action=>"tree", hash=>$ref{'fullname'}, hash_base=>$ref{'fullname'})}, "tree") .
5144                       "</td>\n" .
5145                       "</tr>";
5146         }
5147         if (defined $extra) {
5148                 print "<tr>\n" .
5149                       "<td colspan=\"3\">$extra</td>\n" .
5150                       "</tr>\n";
5151         }
5152         print "</table>\n";
5153 }
5154
5155 # Display a single remote block
5156 sub git_remote_block {
5157         my ($remote, $rdata, $limit, $head) = @_;
5158
5159         my $heads = $rdata->{'heads'};
5160         my $fetch = $rdata->{'fetch'};
5161         my $push = $rdata->{'push'};
5162
5163         my $urls_table = "<table class=\"projects_list\">\n" ;
5164
5165         if (defined $fetch) {
5166                 if ($fetch eq $push) {
5167                         $urls_table .= format_repo_url("URL", $fetch);
5168                 } else {
5169                         $urls_table .= format_repo_url("Fetch URL", $fetch);
5170                         $urls_table .= format_repo_url("Push URL", $push) if defined $push;
5171                 }
5172         } elsif (defined $push) {
5173                 $urls_table .= format_repo_url("Push URL", $push);
5174         } else {
5175                 $urls_table .= format_repo_url("", "No remote URL");
5176         }
5177
5178         $urls_table .= "</table>\n";
5179
5180         my $dots;
5181         if (defined $limit && $limit < @$heads) {
5182                 $dots = $cgi->a({-href => href(action=>"remotes", hash=>$remote)}, "...");
5183         }
5184
5185         print $urls_table;
5186         git_heads_body($heads, $head, 0, $limit, $dots);
5187 }
5188
5189 # Display a list of remote names with the respective fetch and push URLs
5190 sub git_remotes_list {
5191         my ($remotedata, $limit) = @_;
5192         print "<table class=\"heads\">\n";
5193         my $alternate = 1;
5194         my @remotes = sort keys %$remotedata;
5195
5196         my $limited = $limit && $limit < @remotes;
5197
5198         $#remotes = $limit - 1 if $limited;
5199
5200         while (my $remote = shift @remotes) {
5201                 my $rdata = $remotedata->{$remote};
5202                 my $fetch = $rdata->{'fetch'};
5203                 my $push = $rdata->{'push'};
5204                 if ($alternate) {
5205                         print "<tr class=\"dark\">\n";
5206                 } else {
5207                         print "<tr class=\"light\">\n";
5208                 }
5209                 $alternate ^= 1;
5210                 print "<td>" .
5211                       $cgi->a({-href=> href(action=>'remotes', hash=>$remote),
5212                                -class=> "list name"},esc_html($remote)) .
5213                       "</td>";
5214                 print "<td class=\"link\">" .
5215                       (defined $fetch ? $cgi->a({-href=> $fetch}, "fetch") : "fetch") .
5216                       " | " .
5217                       (defined $push ? $cgi->a({-href=> $push}, "push") : "push") .
5218                       "</td>";
5219
5220                 print "</tr>\n";
5221         }
5222
5223         if ($limited) {
5224                 print "<tr>\n" .
5225                       "<td colspan=\"3\">" .
5226                       $cgi->a({-href => href(action=>"remotes")}, "...") .
5227                       "</td>\n" . "</tr>\n";
5228         }
5229
5230         print "</table>";
5231 }
5232
5233 # Display remote heads grouped by remote, unless there are too many
5234 # remotes, in which case we only display the remote names
5235 sub git_remotes_body {
5236         my ($remotedata, $limit, $head) = @_;
5237         if ($limit and $limit < keys %$remotedata) {
5238                 git_remotes_list($remotedata, $limit);
5239         } else {
5240                 fill_remote_heads($remotedata);
5241                 while (my ($remote, $rdata) = each %$remotedata) {
5242                         git_print_section({-class=>"remote", -id=>$remote},
5243                                 ["remotes", $remote, $remote], sub {
5244                                         git_remote_block($remote, $rdata, $limit, $head);
5245                                 });
5246                 }
5247         }
5248 }
5249
5250 sub git_search_grep_body {
5251         my ($commitlist, $from, $to, $extra) = @_;
5252         $from = 0 unless defined $from;
5253         $to = $#{$commitlist} if (!defined $to || $#{$commitlist} < $to);
5254
5255         print "<table class=\"commit_search\">\n";
5256         my $alternate = 1;
5257         for (my $i = $from; $i <= $to; $i++) {
5258                 my %co = %{$commitlist->[$i]};
5259                 if (!%co) {
5260                         next;
5261                 }
5262                 my $commit = $co{'id'};
5263                 if ($alternate) {
5264                         print "<tr class=\"dark\">\n";
5265                 } else {
5266                         print "<tr class=\"light\">\n";
5267                 }
5268                 $alternate ^= 1;
5269                 print "<td title=\"$co{'age_string_age'}\"><i>$co{'age_string_date'}</i></td>\n" .
5270                       format_author_html('td', \%co, 15, 5) .
5271                       "<td>" .
5272                       $cgi->a({-href => href(action=>"commit", hash=>$co{'id'}),
5273                                -class => "list subject"},
5274                               chop_and_escape_str($co{'title'}, 50) . "<br/>");
5275                 my $comment = $co{'comment'};
5276                 foreach my $line (@$comment) {
5277                         if ($line =~ m/^(.*?)($search_regexp)(.*)$/i) {
5278                                 my ($lead, $match, $trail) = ($1, $2, $3);
5279                                 $match = chop_str($match, 70, 5, 'center');
5280                                 my $contextlen = int((80 - length($match))/2);
5281                                 $contextlen = 30 if ($contextlen > 30);
5282                                 $lead  = chop_str($lead,  $contextlen, 10, 'left');
5283                                 $trail = chop_str($trail, $contextlen, 10, 'right');
5284
5285                                 $lead  = esc_html($lead);
5286                                 $match = esc_html($match);
5287                                 $trail = esc_html($trail);
5288
5289                                 print "$lead<span class=\"match\">$match</span>$trail<br />";
5290                         }
5291                 }
5292                 print "</td>\n" .
5293                       "<td class=\"link\">" .
5294                       $cgi->a({-href => href(action=>"commit", hash=>$co{'id'})}, "commit") .
5295                       " | " .
5296                       $cgi->a({-href => href(action=>"commitdiff", hash=>$co{'id'})}, "commitdiff") .
5297                       " | " .
5298                       $cgi->a({-href => href(action=>"tree", hash=>$co{'tree'}, hash_base=>$co{'id'})}, "tree");
5299                 print "</td>\n" .
5300                       "</tr>\n";
5301         }
5302         if (defined $extra) {
5303                 print "<tr>\n" .
5304                       "<td colspan=\"3\">$extra</td>\n" .
5305                       "</tr>\n";
5306         }
5307         print "</table>\n";
5308 }
5309
5310 ## ======================================================================
5311 ## ======================================================================
5312 ## actions
5313
5314 sub git_project_list {
5315         my $order = $input_params{'order'};
5316         if (defined $order && $order !~ m/none|project|descr|owner|age/) {
5317                 die_error(400, "Unknown order parameter");
5318         }
5319
5320         my @list = git_get_projects_list();
5321         if (!@list) {
5322                 die_error(404, "No projects found");
5323         }
5324
5325         git_header_html();
5326         if (defined $home_text && -f $home_text) {
5327                 print "<div class=\"index_include\">\n";
5328                 insert_file($home_text);
5329                 print "</div>\n";
5330         }
5331         print $cgi->startform(-method => "get") .
5332               "<p class=\"projsearch\">Search:\n" .
5333               $cgi->textfield(-name => "s", -value => $searchtext) . "\n" .
5334               "</p>" .
5335               $cgi->end_form() . "\n";
5336         git_project_list_body(\@list, $order);
5337         git_footer_html();
5338 }
5339
5340 sub git_forks {
5341         my $order = $input_params{'order'};
5342         if (defined $order && $order !~ m/none|project|descr|owner|age/) {
5343                 die_error(400, "Unknown order parameter");
5344         }
5345
5346         my @list = git_get_projects_list($project);
5347         if (!@list) {
5348                 die_error(404, "No forks found");
5349         }
5350
5351         git_header_html();
5352         git_print_page_nav('','');
5353         git_print_header_div('summary', "$project forks");
5354         git_project_list_body(\@list, $order);
5355         git_footer_html();
5356 }
5357
5358 sub git_project_index {
5359         my @projects = git_get_projects_list($project);
5360
5361         print $cgi->header(
5362                 -type => 'text/plain',
5363                 -charset => 'utf-8',
5364                 -content_disposition => 'inline; filename="index.aux"');
5365
5366         foreach my $pr (@projects) {
5367                 if (!exists $pr->{'owner'}) {
5368                         $pr->{'owner'} = git_get_project_owner("$pr->{'path'}");
5369                 }
5370
5371                 my ($path, $owner) = ($pr->{'path'}, $pr->{'owner'});
5372                 # quote as in CGI::Util::encode, but keep the slash, and use '+' for ' '
5373                 $path  =~ s/([^a-zA-Z0-9_.\-\/ ])/sprintf("%%%02X", ord($1))/eg;
5374                 $owner =~ s/([^a-zA-Z0-9_.\-\/ ])/sprintf("%%%02X", ord($1))/eg;
5375                 $path  =~ s/ /\+/g;
5376                 $owner =~ s/ /\+/g;
5377
5378                 print "$path $owner\n";
5379         }
5380 }
5381
5382 sub git_summary {
5383         my $descr = git_get_project_description($project) || "none";
5384         my %co = parse_commit("HEAD");
5385         my %cd = %co ? parse_date($co{'committer_epoch'}, $co{'committer_tz'}) : ();
5386         my $head = $co{'id'};
5387         my $remote_heads = gitweb_check_feature('remote_heads');
5388
5389         my $owner = git_get_project_owner($project);
5390
5391         my $refs = git_get_references();
5392         # These get_*_list functions return one more to allow us to see if
5393         # there are more ...
5394         my @taglist  = git_get_tags_list(16);
5395         my @headlist = git_get_heads_list(16);
5396         my %remotedata = $remote_heads ? git_get_remotes_list() : ();
5397         my @forklist;
5398         my $check_forks = gitweb_check_feature('forks');
5399
5400         if ($check_forks) {
5401                 @forklist = git_get_projects_list($project);
5402         }
5403
5404         git_header_html();
5405         git_print_page_nav('summary','', $head);
5406
5407         print "<div class=\"title\">&nbsp;</div>\n";
5408         print "<table class=\"projects_list\">\n" .
5409               "<tr id=\"metadata_desc\"><td>description</td><td>" . esc_html($descr) . "</td></tr>\n" .
5410               "<tr id=\"metadata_owner\"><td>owner</td><td>" . esc_html($owner) . "</td></tr>\n";
5411         if (defined $cd{'rfc2822'}) {
5412                 print "<tr id=\"metadata_lchange\"><td>last change</td><td>$cd{'rfc2822'}</td></tr>\n";
5413         }
5414
5415         # use per project git URL list in $projectroot/$project/cloneurl
5416         # or make project git URL from git base URL and project name
5417         my $url_tag = "URL";
5418         my @url_list = git_get_project_url_list($project);
5419         @url_list = map { "$_/$project" } @git_base_url_list unless @url_list;
5420         foreach my $git_url (@url_list) {
5421                 next unless $git_url;
5422                 print format_repo_url($url_tag, $git_url);
5423                 $url_tag = "";
5424         }
5425
5426         # Tag cloud
5427         my $show_ctags = gitweb_check_feature('ctags');
5428         if ($show_ctags) {
5429                 my $ctags = git_get_project_ctags($project);
5430                 my $cloud = git_populate_project_tagcloud($ctags);
5431                 print "<tr id=\"metadata_ctags\"><td>Content tags:<br />";
5432                 print "</td>\n<td>" unless %$ctags;
5433                 print "<form action=\"$show_ctags\" method=\"post\"><input type=\"hidden\" name=\"p\" value=\"$project\" />Add: <input type=\"text\" name=\"t\" size=\"8\" /></form>";
5434                 print "</td>\n<td>" if %$ctags;
5435                 print git_show_project_tagcloud($cloud, 48);
5436                 print "</td></tr>";
5437         }
5438
5439         print "</table>\n";
5440
5441         # If XSS prevention is on, we don't include README.html.
5442         # TODO: Allow a readme in some safe format.
5443         if (!$prevent_xss && -s "$projectroot/$project/README.html") {
5444                 print "<div class=\"title\">readme</div>\n" .
5445                       "<div class=\"readme\">\n";
5446                 insert_file("$projectroot/$project/README.html");
5447                 print "\n</div>\n"; # class="readme"
5448         }
5449
5450         # we need to request one more than 16 (0..15) to check if
5451         # those 16 are all
5452         my @commitlist = $head ? parse_commits($head, 17) : ();
5453         if (@commitlist) {
5454                 git_print_header_div('shortlog');
5455                 git_shortlog_body(\@commitlist, 0, 15, $refs,
5456                                   $#commitlist <=  15 ? undef :
5457                                   $cgi->a({-href => href(action=>"shortlog")}, "..."));
5458         }
5459
5460         if (@taglist) {
5461                 git_print_header_div('tags');
5462                 git_tags_body(\@taglist, 0, 15,
5463                               $#taglist <=  15 ? undef :
5464                               $cgi->a({-href => href(action=>"tags")}, "..."));
5465         }
5466
5467         if (@headlist) {
5468                 git_print_header_div('heads');
5469                 git_heads_body(\@headlist, $head, 0, 15,
5470                                $#headlist <= 15 ? undef :
5471                                $cgi->a({-href => href(action=>"heads")}, "..."));
5472         }
5473
5474         if (%remotedata) {
5475                 git_print_header_div('remotes');
5476                 git_remotes_body(\%remotedata, 15, $head);
5477         }
5478
5479         if (@forklist) {
5480                 git_print_header_div('forks');
5481                 git_project_list_body(\@forklist, 'age', 0, 15,
5482                                       $#forklist <= 15 ? undef :
5483                                       $cgi->a({-href => href(action=>"forks")}, "..."),
5484                                       'no_header');
5485         }
5486
5487         git_footer_html();
5488 }
5489
5490 sub git_tag {
5491         my %tag = parse_tag($hash);
5492
5493         if (! %tag) {
5494                 die_error(404, "Unknown tag object");
5495         }
5496
5497         my $head = git_get_head_hash($project);
5498         git_header_html();
5499         git_print_page_nav('','', $head,undef,$head);
5500         git_print_header_div('commit', esc_html($tag{'name'}), $hash);
5501         print "<div class=\"title_text\">\n" .
5502               "<table class=\"object_header\">\n" .
5503               "<tr>\n" .
5504               "<td>object</td>\n" .
5505               "<td>" . $cgi->a({-class => "list", -href => href(action=>$tag{'type'}, hash=>$tag{'object'})},
5506                                $tag{'object'}) . "</td>\n" .
5507               "<td class=\"link\">" . $cgi->a({-href => href(action=>$tag{'type'}, hash=>$tag{'object'})},
5508                                               $tag{'type'}) . "</td>\n" .
5509               "</tr>\n";
5510         if (defined($tag{'author'})) {
5511                 git_print_authorship_rows(\%tag, 'author');
5512         }
5513         print "</table>\n\n" .
5514               "</div>\n";
5515         print "<div class=\"page_body\">";
5516         my $comment = $tag{'comment'};
5517         foreach my $line (@$comment) {
5518                 chomp $line;
5519                 print esc_html($line, -nbsp=>1) . "<br/>\n";
5520         }
5521         print "</div>\n";
5522         git_footer_html();
5523 }
5524
5525 sub git_blame_common {
5526         my $format = shift || 'porcelain';
5527         if ($format eq 'porcelain' && $cgi->param('js')) {
5528                 $format = 'incremental';
5529                 $action = 'blame_incremental'; # for page title etc
5530         }
5531
5532         # permissions
5533         gitweb_check_feature('blame')
5534                 or die_error(403, "Blame view not allowed");
5535
5536         # error checking
5537         die_error(400, "No file name given") unless $file_name;
5538         $hash_base ||= git_get_head_hash($project);
5539         die_error(404, "Couldn't find base commit") unless $hash_base;
5540         my %co = parse_commit($hash_base)
5541                 or die_error(404, "Commit not found");
5542         my $ftype = "blob";
5543         if (!defined $hash) {
5544                 $hash = git_get_hash_by_path($hash_base, $file_name, "blob")
5545                         or die_error(404, "Error looking up file");
5546         } else {
5547                 $ftype = git_get_type($hash);
5548                 if ($ftype !~ "blob") {
5549                         die_error(400, "Object is not a blob");
5550                 }
5551         }
5552
5553         my $fd;
5554         if ($format eq 'incremental') {
5555                 # get file contents (as base)
5556                 open $fd, "-|", git_cmd(), 'cat-file', 'blob', $hash
5557                         or die_error(500, "Open git-cat-file failed");
5558         } elsif ($format eq 'data') {
5559                 # run git-blame --incremental
5560                 open $fd, "-|", git_cmd(), "blame", "--incremental",
5561                         $hash_base, "--", $file_name
5562                         or die_error(500, "Open git-blame --incremental failed");
5563         } else {
5564                 # run git-blame --porcelain
5565                 open $fd, "-|", git_cmd(), "blame", '-p',
5566                         $hash_base, '--', $file_name
5567                         or die_error(500, "Open git-blame --porcelain failed");
5568         }
5569
5570         # incremental blame data returns early
5571         if ($format eq 'data') {
5572                 print $cgi->header(
5573                         -type=>"text/plain", -charset => "utf-8",
5574                         -status=> "200 OK");
5575                 local $| = 1; # output autoflush
5576                 print while <$fd>;
5577                 close $fd
5578                         or print "ERROR $!\n";
5579
5580                 print 'END';
5581                 if (defined $t0 && gitweb_check_feature('timed')) {
5582                         print ' '.
5583                               tv_interval($t0, [ gettimeofday() ]).
5584                               ' '.$number_of_git_cmds;
5585                 }
5586                 print "\n";
5587
5588                 return;
5589         }
5590
5591         # page header
5592         git_header_html();
5593         my $formats_nav =
5594                 $cgi->a({-href => href(action=>"blob", -replay=>1)},
5595                         "blob") .
5596                 " | ";
5597         if ($format eq 'incremental') {
5598                 $formats_nav .=
5599                         $cgi->a({-href => href(action=>"blame", javascript=>0, -replay=>1)},
5600                                 "blame") . " (non-incremental)";
5601         } else {
5602                 $formats_nav .=
5603                         $cgi->a({-href => href(action=>"blame_incremental", -replay=>1)},
5604                                 "blame") . " (incremental)";
5605         }
5606         $formats_nav .=
5607                 " | " .
5608                 $cgi->a({-href => href(action=>"history", -replay=>1)},
5609                         "history") .
5610                 " | " .
5611                 $cgi->a({-href => href(action=>$action, file_name=>$file_name)},
5612                         "HEAD");
5613         git_print_page_nav('','', $hash_base,$co{'tree'},$hash_base, $formats_nav);
5614         git_print_header_div('commit', esc_html($co{'title'}), $hash_base);
5615         git_print_page_path($file_name, $ftype, $hash_base);
5616
5617         # page body
5618         if ($format eq 'incremental') {
5619                 print "<noscript>\n<div class=\"error\"><center><b>\n".
5620                       "This page requires JavaScript to run.\n Use ".
5621                       $cgi->a({-href => href(action=>'blame',javascript=>0,-replay=>1)},
5622                               'this page').
5623                       " instead.\n".
5624                       "</b></center></div>\n</noscript>\n";
5625
5626                 print qq!<div id="progress_bar" style="width: 100%; background-color: yellow"></div>\n!;
5627         }
5628
5629         print qq!<div class="page_body">\n!;
5630         print qq!<div id="progress_info">... / ...</div>\n!
5631                 if ($format eq 'incremental');
5632         print qq!<table id="blame_table" class="blame" width="100%">\n!.
5633               #qq!<col width="5.5em" /><col width="2.5em" /><col width="*" />\n!.
5634               qq!<thead>\n!.
5635               qq!<tr><th>Commit</th><th>Line</th><th>Data</th></tr>\n!.
5636               qq!</thead>\n!.
5637               qq!<tbody>\n!;
5638
5639         my @rev_color = qw(light dark);
5640         my $num_colors = scalar(@rev_color);
5641         my $current_color = 0;
5642
5643         if ($format eq 'incremental') {
5644                 my $color_class = $rev_color[$current_color];
5645
5646                 #contents of a file
5647                 my $linenr = 0;
5648         LINE:
5649                 while (my $line = <$fd>) {
5650                         chomp $line;
5651                         $linenr++;
5652
5653                         print qq!<tr id="l$linenr" class="$color_class">!.
5654                               qq!<td class="sha1"><a href=""> </a></td>!.
5655                               qq!<td class="linenr">!.
5656                               qq!<a class="linenr" href="">$linenr</a></td>!;
5657                         print qq!<td class="pre">! . esc_html($line) . "</td>\n";
5658                         print qq!</tr>\n!;
5659                 }
5660
5661         } else { # porcelain, i.e. ordinary blame
5662                 my %metainfo = (); # saves information about commits
5663
5664                 # blame data
5665         LINE:
5666                 while (my $line = <$fd>) {
5667                         chomp $line;
5668                         # the header: <SHA-1> <src lineno> <dst lineno> [<lines in group>]
5669                         # no <lines in group> for subsequent lines in group of lines
5670                         my ($full_rev, $orig_lineno, $lineno, $group_size) =
5671                            ($line =~ /^([0-9a-f]{40}) (\d+) (\d+)(?: (\d+))?$/);
5672                         if (!exists $metainfo{$full_rev}) {
5673                                 $metainfo{$full_rev} = { 'nprevious' => 0 };
5674                         }
5675                         my $meta = $metainfo{$full_rev};
5676                         my $data;
5677                         while ($data = <$fd>) {
5678                                 chomp $data;
5679                                 last if ($data =~ s/^\t//); # contents of line
5680                                 if ($data =~ /^(\S+)(?: (.*))?$/) {
5681                                         $meta->{$1} = $2 unless exists $meta->{$1};
5682                                 }
5683                                 if ($data =~ /^previous /) {
5684                                         $meta->{'nprevious'}++;
5685                                 }
5686                         }
5687                         my $short_rev = substr($full_rev, 0, 8);
5688                         my $author = $meta->{'author'};
5689                         my %date =
5690                                 parse_date($meta->{'author-time'}, $meta->{'author-tz'});
5691                         my $date = $date{'iso-tz'};
5692                         if ($group_size) {
5693                                 $current_color = ($current_color + 1) % $num_colors;
5694                         }
5695                         my $tr_class = $rev_color[$current_color];
5696                         $tr_class .= ' boundary' if (exists $meta->{'boundary'});
5697                         $tr_class .= ' no-previous' if ($meta->{'nprevious'} == 0);
5698                         $tr_class .= ' multiple-previous' if ($meta->{'nprevious'} > 1);
5699                         print "<tr id=\"l$lineno\" class=\"$tr_class\">\n";
5700                         if ($group_size) {
5701                                 print "<td class=\"sha1\"";
5702                                 print " title=\"". esc_html($author) . ", $date\"";
5703                                 print " rowspan=\"$group_size\"" if ($group_size > 1);
5704                                 print ">";
5705                                 print $cgi->a({-href => href(action=>"commit",
5706                                                              hash=>$full_rev,
5707                                                              file_name=>$file_name)},
5708                                               esc_html($short_rev));
5709                                 if ($group_size >= 2) {
5710                                         my @author_initials = ($author =~ /\b([[:upper:]])\B/g);
5711                                         if (@author_initials) {
5712                                                 print "<br />" .
5713                                                       esc_html(join('', @author_initials));
5714                                                 #           or join('.', ...)
5715                                         }
5716                                 }
5717                                 print "</td>\n";
5718                         }
5719                         # 'previous' <sha1 of parent commit> <filename at commit>
5720                         if (exists $meta->{'previous'} &&
5721                             $meta->{'previous'} =~ /^([a-fA-F0-9]{40}) (.*)$/) {
5722                                 $meta->{'parent'} = $1;
5723                                 $meta->{'file_parent'} = unquote($2);
5724                         }
5725                         my $linenr_commit =
5726                                 exists($meta->{'parent'}) ?
5727                                 $meta->{'parent'} : $full_rev;
5728                         my $linenr_filename =
5729                                 exists($meta->{'file_parent'}) ?
5730                                 $meta->{'file_parent'} : unquote($meta->{'filename'});
5731                         my $blamed = href(action => 'blame',
5732                                           file_name => $linenr_filename,
5733                                           hash_base => $linenr_commit);
5734                         print "<td class=\"linenr\">";
5735                         print $cgi->a({ -href => "$blamed#l$orig_lineno",
5736                                         -class => "linenr" },
5737                                       esc_html($lineno));
5738                         print "</td>";
5739                         print "<td class=\"pre\">" . esc_html($data) . "</td>\n";
5740                         print "</tr>\n";
5741                 } # end while
5742
5743         }
5744
5745         # footer
5746         print "</tbody>\n".
5747               "</table>\n"; # class="blame"
5748         print "</div>\n";   # class="blame_body"
5749         close $fd
5750                 or print "Reading blob failed\n";
5751
5752         git_footer_html();
5753 }
5754
5755 sub git_blame {
5756         git_blame_common();
5757 }
5758
5759 sub git_blame_incremental {
5760         git_blame_common('incremental');
5761 }
5762
5763 sub git_blame_data {
5764         git_blame_common('data');
5765 }
5766
5767 sub git_tags {
5768         my $head = git_get_head_hash($project);
5769         git_header_html();
5770         git_print_page_nav('','', $head,undef,$head,format_ref_views('tags'));
5771         git_print_header_div('summary', $project);
5772
5773         my @tagslist = git_get_tags_list();
5774         if (@tagslist) {
5775                 git_tags_body(\@tagslist);
5776         }
5777         git_footer_html();
5778 }
5779
5780 sub git_heads {
5781         my $head = git_get_head_hash($project);
5782         git_header_html();
5783         git_print_page_nav('','', $head,undef,$head,format_ref_views('heads'));
5784         git_print_header_div('summary', $project);
5785
5786         my @headslist = git_get_heads_list();
5787         if (@headslist) {
5788                 git_heads_body(\@headslist, $head);
5789         }
5790         git_footer_html();
5791 }
5792
5793 # used both for single remote view and for list of all the remotes
5794 sub git_remotes {
5795         gitweb_check_feature('remote_heads')
5796                 or die_error(403, "Remote heads view is disabled");
5797
5798         my $head = git_get_head_hash($project);
5799         my $remote = $input_params{'hash'};
5800
5801         my $remotedata = git_get_remotes_list($remote);
5802         die_error(500, "Unable to get remote information") unless defined $remotedata;
5803
5804         unless (%$remotedata) {
5805                 die_error(404, defined $remote ?
5806                         "Remote $remote not found" :
5807                         "No remotes found");
5808         }
5809
5810         git_header_html(undef, undef, -action_extra => $remote);
5811         git_print_page_nav('', '',  $head, undef, $head,
5812                 format_ref_views($remote ? '' : 'remotes'));
5813
5814         fill_remote_heads($remotedata);
5815         if (defined $remote) {
5816                 git_print_header_div('remotes', "$remote remote for $project");
5817                 git_remote_block($remote, $remotedata->{$remote}, undef, $head);
5818         } else {
5819                 git_print_header_div('summary', "$project remotes");
5820                 git_remotes_body($remotedata, undef, $head);
5821         }
5822
5823         git_footer_html();
5824 }
5825
5826 sub git_blob_plain {
5827         my $type = shift;
5828         my $expires;
5829
5830         if (!defined $hash) {
5831                 if (defined $file_name) {
5832                         my $base = $hash_base || git_get_head_hash($project);
5833                         $hash = git_get_hash_by_path($base, $file_name, "blob")
5834                                 or die_error(404, "Cannot find file");
5835                 } else {
5836                         die_error(400, "No file name defined");
5837                 }
5838         } elsif ($hash =~ m/^[0-9a-fA-F]{40}$/) {
5839                 # blobs defined by non-textual hash id's can be cached
5840                 $expires = "+1d";
5841         }
5842
5843         open my $fd, "-|", git_cmd(), "cat-file", "blob", $hash
5844                 or die_error(500, "Open git-cat-file blob '$hash' failed");
5845
5846         # content-type (can include charset)
5847         $type = blob_contenttype($fd, $file_name, $type);
5848
5849         # "save as" filename, even when no $file_name is given
5850         my $save_as = "$hash";
5851         if (defined $file_name) {
5852                 $save_as = $file_name;
5853         } elsif ($type =~ m/^text\//) {
5854                 $save_as .= '.txt';
5855         }
5856
5857         # With XSS prevention on, blobs of all types except a few known safe
5858         # ones are served with "Content-Disposition: attachment" to make sure
5859         # they don't run in our security domain.  For certain image types,
5860         # blob view writes an <img> tag referring to blob_plain view, and we
5861         # want to be sure not to break that by serving the image as an
5862         # attachment (though Firefox 3 doesn't seem to care).
5863         my $sandbox = $prevent_xss &&
5864                 $type !~ m!^(?:text/plain|image/(?:gif|png|jpeg))$!;
5865
5866         print $cgi->header(
5867                 -type => $type,
5868                 -expires => $expires,
5869                 -content_disposition =>
5870                         ($sandbox ? 'attachment' : 'inline')
5871                         . '; filename="' . $save_as . '"');
5872         local $/ = undef;
5873         binmode STDOUT, ':raw';
5874         print <$fd>;
5875         binmode STDOUT, ':utf8'; # as set at the beginning of gitweb.cgi
5876         close $fd;
5877 }
5878
5879 sub git_blob {
5880         my $expires;
5881
5882         if (!defined $hash) {
5883                 if (defined $file_name) {
5884                         my $base = $hash_base || git_get_head_hash($project);
5885                         $hash = git_get_hash_by_path($base, $file_name, "blob")
5886                                 or die_error(404, "Cannot find file");
5887                 } else {
5888                         die_error(400, "No file name defined");
5889                 }
5890         } elsif ($hash =~ m/^[0-9a-fA-F]{40}$/) {
5891                 # blobs defined by non-textual hash id's can be cached
5892                 $expires = "+1d";
5893         }
5894
5895         my $have_blame = gitweb_check_feature('blame');
5896         open my $fd, "-|", git_cmd(), "cat-file", "blob", $hash
5897                 or die_error(500, "Couldn't cat $file_name, $hash");
5898         my $mimetype = blob_mimetype($fd, $file_name);
5899         # use 'blob_plain' (aka 'raw') view for files that cannot be displayed
5900         if ($mimetype !~ m!^(?:text/|image/(?:gif|png|jpeg)$)! && -B $fd) {
5901                 close $fd;
5902                 return git_blob_plain($mimetype);
5903         }
5904         # we can have blame only for text/* mimetype
5905         $have_blame &&= ($mimetype =~ m!^text/!);
5906
5907         my $highlight = gitweb_check_feature('highlight');
5908         my $syntax = guess_file_syntax($highlight, $mimetype, $file_name);
5909         $fd = run_highlighter($fd, $highlight, $syntax)
5910                 if $syntax;
5911
5912         git_header_html(undef, $expires);
5913         my $formats_nav = '';
5914         if (defined $hash_base && (my %co = parse_commit($hash_base))) {
5915                 if (defined $file_name) {
5916                         if ($have_blame) {
5917                                 $formats_nav .=
5918                                         $cgi->a({-href => href(action=>"blame", -replay=>1)},
5919                                                 "blame") .
5920                                         " | ";
5921                         }
5922                         $formats_nav .=
5923                                 $cgi->a({-href => href(action=>"history", -replay=>1)},
5924                                         "history") .
5925                                 " | " .
5926                                 $cgi->a({-href => href(action=>"blob_plain", -replay=>1)},
5927                                         "raw") .
5928                                 " | " .
5929                                 $cgi->a({-href => href(action=>"blob",
5930                                                        hash_base=>"HEAD", file_name=>$file_name)},
5931                                         "HEAD");
5932                 } else {
5933                         $formats_nav .=
5934                                 $cgi->a({-href => href(action=>"blob_plain", -replay=>1)},
5935                                         "raw");
5936                 }
5937                 git_print_page_nav('','', $hash_base,$co{'tree'},$hash_base, $formats_nav);
5938                 git_print_header_div('commit', esc_html($co{'title'}), $hash_base);
5939         } else {
5940                 print "<div class=\"page_nav\">\n" .
5941                       "<br/><br/></div>\n" .
5942                       "<div class=\"title\">".esc_html($hash)."</div>\n";
5943         }
5944         git_print_page_path($file_name, "blob", $hash_base);
5945         print "<div class=\"page_body\">\n";
5946         if ($mimetype =~ m!^image/!) {
5947                 print qq!<img type="!.esc_attr($mimetype).qq!"!;
5948                 if ($file_name) {
5949                         print qq! alt="!.esc_attr($file_name).qq!" title="!.esc_attr($file_name).qq!"!;
5950                 }
5951                 print qq! src="! .
5952                       href(action=>"blob_plain", hash=>$hash,
5953                            hash_base=>$hash_base, file_name=>$file_name) .
5954                       qq!" />\n!;
5955         } else {
5956                 my $nr;
5957                 while (my $line = <$fd>) {
5958                         chomp $line;
5959                         $nr++;
5960                         $line = untabify($line);
5961                         printf qq!<div class="pre"><a id="l%i" href="%s#l%i" class="linenr">%4i</a> %s</div>\n!,
5962                                $nr, href(-replay => 1), $nr, $nr, $syntax ? $line : esc_html($line, -nbsp=>1);
5963                 }
5964         }
5965         close $fd
5966                 or print "Reading blob failed.\n";
5967         print "</div>";
5968         git_footer_html();
5969 }
5970
5971 sub git_tree {
5972         if (!defined $hash_base) {
5973                 $hash_base = "HEAD";
5974         }
5975         if (!defined $hash) {
5976                 if (defined $file_name) {
5977                         $hash = git_get_hash_by_path($hash_base, $file_name, "tree");
5978                 } else {
5979                         $hash = $hash_base;
5980                 }
5981         }
5982         die_error(404, "No such tree") unless defined($hash);
5983
5984         my $show_sizes = gitweb_check_feature('show-sizes');
5985         my $have_blame = gitweb_check_feature('blame');
5986
5987         my @entries = ();
5988         {
5989                 local $/ = "\0";
5990                 open my $fd, "-|", git_cmd(), "ls-tree", '-z',
5991                         ($show_sizes ? '-l' : ()), @extra_options, $hash
5992                         or die_error(500, "Open git-ls-tree failed");
5993                 @entries = map { chomp; $_ } <$fd>;
5994                 close $fd
5995                         or die_error(404, "Reading tree failed");
5996         }
5997
5998         my $refs = git_get_references();
5999         my $ref = format_ref_marker($refs, $hash_base);
6000         git_header_html();
6001         my $basedir = '';
6002         if (defined $hash_base && (my %co = parse_commit($hash_base))) {
6003                 my @views_nav = ();
6004                 if (defined $file_name) {
6005                         push @views_nav,
6006                                 $cgi->a({-href => href(action=>"history", -replay=>1)},
6007                                         "history"),
6008                                 $cgi->a({-href => href(action=>"tree",
6009                                                        hash_base=>"HEAD", file_name=>$file_name)},
6010                                         "HEAD"),
6011                 }
6012                 my $snapshot_links = format_snapshot_links($hash);
6013                 if (defined $snapshot_links) {
6014                         # FIXME: Should be available when we have no hash base as well.
6015                         push @views_nav, $snapshot_links;
6016                 }
6017                 git_print_page_nav('tree','', $hash_base, undef, undef,
6018                                    join(' | ', @views_nav));
6019                 git_print_header_div('commit', esc_html($co{'title'}) . $ref, $hash_base);
6020         } else {
6021                 undef $hash_base;
6022                 print "<div class=\"page_nav\">\n";
6023                 print "<br/><br/></div>\n";
6024                 print "<div class=\"title\">".esc_html($hash)."</div>\n";
6025         }
6026         if (defined $file_name) {
6027                 $basedir = $file_name;
6028                 if ($basedir ne '' && substr($basedir, -1) ne '/') {
6029                         $basedir .= '/';
6030                 }
6031                 git_print_page_path($file_name, 'tree', $hash_base);
6032         }
6033         print "<div class=\"page_body\">\n";
6034         print "<table class=\"tree\">\n";
6035         my $alternate = 1;
6036         # '..' (top directory) link if possible
6037         if (defined $hash_base &&
6038             defined $file_name && $file_name =~ m![^/]+$!) {
6039                 if ($alternate) {
6040                         print "<tr class=\"dark\">\n";
6041                 } else {
6042                         print "<tr class=\"light\">\n";
6043                 }
6044                 $alternate ^= 1;
6045
6046                 my $up = $file_name;
6047                 $up =~ s!/?[^/]+$!!;
6048                 undef $up unless $up;
6049                 # based on git_print_tree_entry
6050                 print '<td class="mode">' . mode_str('040000') . "</td>\n";
6051                 print '<td class="size">&nbsp;</td>'."\n" if $show_sizes;
6052                 print '<td class="list">';
6053                 print $cgi->a({-href => href(action=>"tree",
6054                                              hash_base=>$hash_base,
6055                                              file_name=>$up)},
6056                               "..");
6057                 print "</td>\n";
6058                 print "<td class=\"link\"></td>\n";
6059
6060                 print "</tr>\n";
6061         }
6062         foreach my $line (@entries) {
6063                 my %t = parse_ls_tree_line($line, -z => 1, -l => $show_sizes);
6064
6065                 if ($alternate) {
6066                         print "<tr class=\"dark\">\n";
6067                 } else {
6068                         print "<tr class=\"light\">\n";
6069                 }
6070                 $alternate ^= 1;
6071
6072                 git_print_tree_entry(\%t, $basedir, $hash_base, $have_blame);
6073
6074                 print "</tr>\n";
6075         }
6076         print "</table>\n" .
6077               "</div>";
6078         git_footer_html();
6079 }
6080
6081 sub snapshot_name {
6082         my ($project, $hash) = @_;
6083
6084         # path/to/project.git  -> project
6085         # path/to/project/.git -> project
6086         my $name = to_utf8($project);
6087         $name =~ s,([^/])/*\.git$,$1,;
6088         $name = basename($name);
6089         # sanitize name
6090         $name =~ s/[[:cntrl:]]/?/g;
6091
6092         my $ver = $hash;
6093         if ($hash =~ /^[0-9a-fA-F]+$/) {
6094                 # shorten SHA-1 hash
6095                 my $full_hash = git_get_full_hash($project, $hash);
6096                 if ($full_hash =~ /^$hash/ && length($hash) > 7) {
6097                         $ver = git_get_short_hash($project, $hash);
6098                 }
6099         } elsif ($hash =~ m!^refs/tags/(.*)$!) {
6100                 # tags don't need shortened SHA-1 hash
6101                 $ver = $1;
6102         } else {
6103                 # branches and other need shortened SHA-1 hash
6104                 if ($hash =~ m!^refs/(?:heads|remotes)/(.*)$!) {
6105                         $ver = $1;
6106                 }
6107                 $ver .= '-' . git_get_short_hash($project, $hash);
6108         }
6109         # in case of hierarchical branch names
6110         $ver =~ s!/!.!g;
6111
6112         # name = project-version_string
6113         $name = "$name-$ver";
6114
6115         return wantarray ? ($name, $name) : $name;
6116 }
6117
6118 sub git_snapshot {
6119         my $format = $input_params{'snapshot_format'};
6120         if (!@snapshot_fmts) {
6121                 die_error(403, "Snapshots not allowed");
6122         }
6123         # default to first supported snapshot format
6124         $format ||= $snapshot_fmts[0];
6125         if ($format !~ m/^[a-z0-9]+$/) {
6126                 die_error(400, "Invalid snapshot format parameter");
6127         } elsif (!exists($known_snapshot_formats{$format})) {
6128                 die_error(400, "Unknown snapshot format");
6129         } elsif ($known_snapshot_formats{$format}{'disabled'}) {
6130                 die_error(403, "Snapshot format not allowed");
6131         } elsif (!grep($_ eq $format, @snapshot_fmts)) {
6132                 die_error(403, "Unsupported snapshot format");
6133         }
6134
6135         my $type = git_get_type("$hash^{}");
6136         if (!$type) {
6137                 die_error(404, 'Object does not exist');
6138         }  elsif ($type eq 'blob') {
6139                 die_error(400, 'Object is not a tree-ish');
6140         }
6141
6142         my ($name, $prefix) = snapshot_name($project, $hash);
6143         my $filename = "$name$known_snapshot_formats{$format}{'suffix'}";
6144         my $cmd = quote_command(
6145                 git_cmd(), 'archive',
6146                 "--format=$known_snapshot_formats{$format}{'format'}",
6147                 "--prefix=$prefix/", $hash);
6148         if (exists $known_snapshot_formats{$format}{'compressor'}) {
6149                 $cmd .= ' | ' . quote_command(@{$known_snapshot_formats{$format}{'compressor'}});
6150         }
6151
6152         $filename =~ s/(["\\])/\\$1/g;
6153         print $cgi->header(
6154                 -type => $known_snapshot_formats{$format}{'type'},
6155                 -content_disposition => 'inline; filename="' . $filename . '"',
6156                 -status => '200 OK');
6157
6158         open my $fd, "-|", $cmd
6159                 or die_error(500, "Execute git-archive failed");
6160         binmode STDOUT, ':raw';
6161         print <$fd>;
6162         binmode STDOUT, ':utf8'; # as set at the beginning of gitweb.cgi
6163         close $fd;
6164 }
6165
6166 sub git_log_generic {
6167         my ($fmt_name, $body_subr, $base, $parent, $file_name, $file_hash) = @_;
6168
6169         my $head = git_get_head_hash($project);
6170         if (!defined $base) {
6171                 $base = $head;
6172         }
6173         if (!defined $page) {
6174                 $page = 0;
6175         }
6176         my $refs = git_get_references();
6177
6178         my $commit_hash = $base;
6179         if (defined $parent) {
6180                 $commit_hash = "$parent..$base";
6181         }
6182         my @commitlist =
6183                 parse_commits($commit_hash, 101, (100 * $page),
6184                               defined $file_name ? ($file_name, "--full-history") : ());
6185
6186         my $ftype;
6187         if (!defined $file_hash && defined $file_name) {
6188                 # some commits could have deleted file in question,
6189                 # and not have it in tree, but one of them has to have it
6190                 for (my $i = 0; $i < @commitlist; $i++) {
6191                         $file_hash = git_get_hash_by_path($commitlist[$i]{'id'}, $file_name);
6192                         last if defined $file_hash;
6193                 }
6194         }
6195         if (defined $file_hash) {
6196                 $ftype = git_get_type($file_hash);
6197         }
6198         if (defined $file_name && !defined $ftype) {
6199                 die_error(500, "Unknown type of object");
6200         }
6201         my %co;
6202         if (defined $file_name) {
6203                 %co = parse_commit($base)
6204                         or die_error(404, "Unknown commit object");
6205         }
6206
6207
6208         my $paging_nav = format_paging_nav($fmt_name, $page, $#commitlist >= 100);
6209         my $next_link = '';
6210         if ($#commitlist >= 100) {
6211                 $next_link =
6212                         $cgi->a({-href => href(-replay=>1, page=>$page+1),
6213                                  -accesskey => "n", -title => "Alt-n"}, "next");
6214         }
6215         my $patch_max = gitweb_get_feature('patches');
6216         if ($patch_max && !defined $file_name) {
6217                 if ($patch_max < 0 || @commitlist <= $patch_max) {
6218                         $paging_nav .= " &sdot; " .
6219                                 $cgi->a({-href => href(action=>"patches", -replay=>1)},
6220                                         "patches");
6221                 }
6222         }
6223
6224         git_header_html();
6225         git_print_page_nav($fmt_name,'', $hash,$hash,$hash, $paging_nav);
6226         if (defined $file_name) {
6227                 git_print_header_div('commit', esc_html($co{'title'}), $base);
6228         } else {
6229                 git_print_header_div('summary', $project)
6230         }
6231         git_print_page_path($file_name, $ftype, $hash_base)
6232                 if (defined $file_name);
6233
6234         $body_subr->(\@commitlist, 0, 99, $refs, $next_link,
6235                      $file_name, $file_hash, $ftype);
6236
6237         git_footer_html();
6238 }
6239
6240 sub git_log {
6241         git_log_generic('log', \&git_log_body,
6242                         $hash, $hash_parent);
6243 }
6244
6245 sub git_commit {
6246         $hash ||= $hash_base || "HEAD";
6247         my %co = parse_commit($hash)
6248             or die_error(404, "Unknown commit object");
6249
6250         my $parent  = $co{'parent'};
6251         my $parents = $co{'parents'}; # listref
6252
6253         # we need to prepare $formats_nav before any parameter munging
6254         my $formats_nav;
6255         if (!defined $parent) {
6256                 # --root commitdiff
6257                 $formats_nav .= '(initial)';
6258         } elsif (@$parents == 1) {
6259                 # single parent commit
6260                 $formats_nav .=
6261                         '(parent: ' .
6262                         $cgi->a({-href => href(action=>"commit",
6263                                                hash=>$parent)},
6264                                 esc_html(substr($parent, 0, 7))) .
6265                         ')';
6266         } else {
6267                 # merge commit
6268                 $formats_nav .=
6269                         '(merge: ' .
6270                         join(' ', map {
6271                                 $cgi->a({-href => href(action=>"commit",
6272                                                        hash=>$_)},
6273                                         esc_html(substr($_, 0, 7)));
6274                         } @$parents ) .
6275                         ')';
6276         }
6277         if (gitweb_check_feature('patches') && @$parents <= 1) {
6278                 $formats_nav .= " | " .
6279                         $cgi->a({-href => href(action=>"patch", -replay=>1)},
6280                                 "patch");
6281         }
6282
6283         if (!defined $parent) {
6284                 $parent = "--root";
6285         }
6286         my @difftree;
6287         open my $fd, "-|", git_cmd(), "diff-tree", '-r', "--no-commit-id",
6288                 @diff_opts,
6289                 (@$parents <= 1 ? $parent : '-c'),
6290                 $hash, "--"
6291                 or die_error(500, "Open git-diff-tree failed");
6292         @difftree = map { chomp; $_ } <$fd>;
6293         close $fd or die_error(404, "Reading git-diff-tree failed");
6294
6295         # non-textual hash id's can be cached
6296         my $expires;
6297         if ($hash =~ m/^[0-9a-fA-F]{40}$/) {
6298                 $expires = "+1d";
6299         }
6300         my $refs = git_get_references();
6301         my $ref = format_ref_marker($refs, $co{'id'});
6302
6303         git_header_html(undef, $expires);
6304         git_print_page_nav('commit', '',
6305                            $hash, $co{'tree'}, $hash,
6306                            $formats_nav);
6307
6308         if (defined $co{'parent'}) {
6309                 git_print_header_div('commitdiff', esc_html($co{'title'}) . $ref, $hash);
6310         } else {
6311                 git_print_header_div('tree', esc_html($co{'title'}) . $ref, $co{'tree'}, $hash);
6312         }
6313         print "<div class=\"title_text\">\n" .
6314               "<table class=\"object_header\">\n";
6315         git_print_authorship_rows(\%co);
6316         print "<tr><td>commit</td><td class=\"sha1\">$co{'id'}</td></tr>\n";
6317         print "<tr>" .
6318               "<td>tree</td>" .
6319               "<td class=\"sha1\">" .
6320               $cgi->a({-href => href(action=>"tree", hash=>$co{'tree'}, hash_base=>$hash),
6321                        class => "list"}, $co{'tree'}) .
6322               "</td>" .
6323               "<td class=\"link\">" .
6324               $cgi->a({-href => href(action=>"tree", hash=>$co{'tree'}, hash_base=>$hash)},
6325                       "tree");
6326         my $snapshot_links = format_snapshot_links($hash);
6327         if (defined $snapshot_links) {
6328                 print " | " . $snapshot_links;
6329         }
6330         print "</td>" .
6331               "</tr>\n";
6332
6333         foreach my $par (@$parents) {
6334                 print "<tr>" .
6335                       "<td>parent</td>" .
6336                       "<td class=\"sha1\">" .
6337                       $cgi->a({-href => href(action=>"commit", hash=>$par),
6338                                class => "list"}, $par) .
6339                       "</td>" .
6340                       "<td class=\"link\">" .
6341                       $cgi->a({-href => href(action=>"commit", hash=>$par)}, "commit") .
6342                       " | " .
6343                       $cgi->a({-href => href(action=>"commitdiff", hash=>$hash, hash_parent=>$par)}, "diff") .
6344                       "</td>" .
6345                       "</tr>\n";
6346         }
6347         print "</table>".
6348               "</div>\n";
6349
6350         print "<div class=\"page_body\">\n";
6351         git_print_log($co{'comment'});
6352         print "</div>\n";
6353
6354         git_difftree_body(\@difftree, $hash, @$parents);
6355
6356         git_footer_html();
6357 }
6358
6359 sub git_object {
6360         # object is defined by:
6361         # - hash or hash_base alone
6362         # - hash_base and file_name
6363         my $type;
6364
6365         # - hash or hash_base alone
6366         if ($hash || ($hash_base && !defined $file_name)) {
6367                 my $object_id = $hash || $hash_base;
6368
6369                 open my $fd, "-|", quote_command(
6370                         git_cmd(), 'cat-file', '-t', $object_id) . ' 2> /dev/null'
6371                         or die_error(404, "Object does not exist");
6372                 $type = <$fd>;
6373                 chomp $type;
6374                 close $fd
6375                         or die_error(404, "Object does not exist");
6376
6377         # - hash_base and file_name
6378         } elsif ($hash_base && defined $file_name) {
6379                 $file_name =~ s,/+$,,;
6380
6381                 system(git_cmd(), "cat-file", '-e', $hash_base) == 0
6382                         or die_error(404, "Base object does not exist");
6383
6384                 # here errors should not hapen
6385                 open my $fd, "-|", git_cmd(), "ls-tree", $hash_base, "--", $file_name
6386                         or die_error(500, "Open git-ls-tree failed");
6387                 my $line = <$fd>;
6388                 close $fd;
6389
6390                 #'100644 blob 0fa3f3a66fb6a137f6ec2c19351ed4d807070ffa  panic.c'
6391                 unless ($line && $line =~ m/^([0-9]+) (.+) ([0-9a-fA-F]{40})\t/) {
6392                         die_error(404, "File or directory for given base does not exist");
6393                 }
6394                 $type = $2;
6395                 $hash = $3;
6396         } else {
6397                 die_error(400, "Not enough information to find object");
6398         }
6399
6400         print $cgi->redirect(-uri => href(action=>$type, -full=>1,
6401                                           hash=>$hash, hash_base=>$hash_base,
6402                                           file_name=>$file_name),
6403                              -status => '302 Found');
6404 }
6405
6406 sub git_blobdiff {
6407         my $format = shift || 'html';
6408
6409         my $fd;
6410         my @difftree;
6411         my %diffinfo;
6412         my $expires;
6413
6414         # preparing $fd and %diffinfo for git_patchset_body
6415         # new style URI
6416         if (defined $hash_base && defined $hash_parent_base) {
6417                 if (defined $file_name) {
6418                         # read raw output
6419                         open $fd, "-|", git_cmd(), "diff-tree", '-r', @diff_opts,
6420                                 $hash_parent_base, $hash_base,
6421                                 "--", (defined $file_parent ? $file_parent : ()), $file_name
6422                                 or die_error(500, "Open git-diff-tree failed");
6423                         @difftree = map { chomp; $_ } <$fd>;
6424                         close $fd
6425                                 or die_error(404, "Reading git-diff-tree failed");
6426                         @difftree
6427                                 or die_error(404, "Blob diff not found");
6428
6429                 } elsif (defined $hash &&
6430                          $hash =~ /[0-9a-fA-F]{40}/) {
6431                         # try to find filename from $hash
6432
6433                         # read filtered raw output
6434                         open $fd, "-|", git_cmd(), "diff-tree", '-r', @diff_opts,
6435                                 $hash_parent_base, $hash_base, "--"
6436                                 or die_error(500, "Open git-diff-tree failed");
6437                         @difftree =
6438                                 # ':100644 100644 03b21826... 3b93d5e7... M     ls-files.c'
6439                                 # $hash == to_id
6440                                 grep { /^:[0-7]{6} [0-7]{6} [0-9a-fA-F]{40} $hash/ }
6441                                 map { chomp; $_ } <$fd>;
6442                         close $fd
6443                                 or die_error(404, "Reading git-diff-tree failed");
6444                         @difftree
6445                                 or die_error(404, "Blob diff not found");
6446
6447                 } else {
6448                         die_error(400, "Missing one of the blob diff parameters");
6449                 }
6450
6451                 if (@difftree > 1) {
6452                         die_error(400, "Ambiguous blob diff specification");
6453                 }
6454
6455                 %diffinfo = parse_difftree_raw_line($difftree[0]);
6456                 $file_parent ||= $diffinfo{'from_file'} || $file_name;
6457                 $file_name   ||= $diffinfo{'to_file'};
6458
6459                 $hash_parent ||= $diffinfo{'from_id'};
6460                 $hash        ||= $diffinfo{'to_id'};
6461
6462                 # non-textual hash id's can be cached
6463                 if ($hash_base =~ m/^[0-9a-fA-F]{40}$/ &&
6464                     $hash_parent_base =~ m/^[0-9a-fA-F]{40}$/) {
6465                         $expires = '+1d';
6466                 }
6467
6468                 # open patch output
6469                 open $fd, "-|", git_cmd(), "diff-tree", '-r', @diff_opts,
6470                         '-p', ($format eq 'html' ? "--full-index" : ()),
6471                         $hash_parent_base, $hash_base,
6472                         "--", (defined $file_parent ? $file_parent : ()), $file_name
6473                         or die_error(500, "Open git-diff-tree failed");
6474         }
6475
6476         # old/legacy style URI -- not generated anymore since 1.4.3.
6477         if (!%diffinfo) {
6478                 die_error('404 Not Found', "Missing one of the blob diff parameters")
6479         }
6480
6481         # header
6482         if ($format eq 'html') {
6483                 my $formats_nav =
6484                         $cgi->a({-href => href(action=>"blobdiff_plain", -replay=>1)},
6485                                 "raw");
6486                 git_header_html(undef, $expires);
6487                 if (defined $hash_base && (my %co = parse_commit($hash_base))) {
6488                         git_print_page_nav('','', $hash_base,$co{'tree'},$hash_base, $formats_nav);
6489                         git_print_header_div('commit', esc_html($co{'title'}), $hash_base);
6490                 } else {
6491                         print "<div class=\"page_nav\"><br/>$formats_nav<br/></div>\n";
6492                         print "<div class=\"title\">".esc_html("$hash vs $hash_parent")."</div>\n";
6493                 }
6494                 if (defined $file_name) {
6495                         git_print_page_path($file_name, "blob", $hash_base);
6496                 } else {
6497                         print "<div class=\"page_path\"></div>\n";
6498                 }
6499
6500         } elsif ($format eq 'plain') {
6501                 print $cgi->header(
6502                         -type => 'text/plain',
6503                         -charset => 'utf-8',
6504                         -expires => $expires,
6505                         -content_disposition => 'inline; filename="' . "$file_name" . '.patch"');
6506
6507                 print "X-Git-Url: " . $cgi->self_url() . "\n\n";
6508
6509         } else {
6510                 die_error(400, "Unknown blobdiff format");
6511         }
6512
6513         # patch
6514         if ($format eq 'html') {
6515                 print "<div class=\"page_body\">\n";
6516
6517                 git_patchset_body($fd, [ \%diffinfo ], $hash_base, $hash_parent_base);
6518                 close $fd;
6519
6520                 print "</div>\n"; # class="page_body"
6521                 git_footer_html();
6522
6523         } else {
6524                 while (my $line = <$fd>) {
6525                         $line =~ s!a/($hash|$hash_parent)!'a/'.esc_path($diffinfo{'from_file'})!eg;
6526                         $line =~ s!b/($hash|$hash_parent)!'b/'.esc_path($diffinfo{'to_file'})!eg;
6527
6528                         print $line;
6529
6530                         last if $line =~ m!^\+\+\+!;
6531                 }
6532                 local $/ = undef;
6533                 print <$fd>;
6534                 close $fd;
6535         }
6536 }
6537
6538 sub git_blobdiff_plain {
6539         git_blobdiff('plain');
6540 }
6541
6542 sub git_commitdiff {
6543         my %params = @_;
6544         my $format = $params{-format} || 'html';
6545
6546         my ($patch_max) = gitweb_get_feature('patches');
6547         if ($format eq 'patch') {
6548                 die_error(403, "Patch view not allowed") unless $patch_max;
6549         }
6550
6551         $hash ||= $hash_base || "HEAD";
6552         my %co = parse_commit($hash)
6553             or die_error(404, "Unknown commit object");
6554
6555         # choose format for commitdiff for merge
6556         if (! defined $hash_parent && @{$co{'parents'}} > 1) {
6557                 $hash_parent = '--cc';
6558         }
6559         # we need to prepare $formats_nav before almost any parameter munging
6560         my $formats_nav;
6561         if ($format eq 'html') {
6562                 $formats_nav =
6563                         $cgi->a({-href => href(action=>"commitdiff_plain", -replay=>1)},
6564                                 "raw");
6565                 if ($patch_max && @{$co{'parents'}} <= 1) {
6566                         $formats_nav .= " | " .
6567                                 $cgi->a({-href => href(action=>"patch", -replay=>1)},
6568                                         "patch");
6569                 }
6570
6571                 if (defined $hash_parent &&
6572                     $hash_parent ne '-c' && $hash_parent ne '--cc') {
6573                         # commitdiff with two commits given
6574                         my $hash_parent_short = $hash_parent;
6575                         if ($hash_parent =~ m/^[0-9a-fA-F]{40}$/) {
6576                                 $hash_parent_short = substr($hash_parent, 0, 7);
6577                         }
6578                         $formats_nav .=
6579                                 ' (from';
6580                         for (my $i = 0; $i < @{$co{'parents'}}; $i++) {
6581                                 if ($co{'parents'}[$i] eq $hash_parent) {
6582                                         $formats_nav .= ' parent ' . ($i+1);
6583                                         last;
6584                                 }
6585                         }
6586                         $formats_nav .= ': ' .
6587                                 $cgi->a({-href => href(action=>"commitdiff",
6588                                                        hash=>$hash_parent)},
6589                                         esc_html($hash_parent_short)) .
6590                                 ')';
6591                 } elsif (!$co{'parent'}) {
6592                         # --root commitdiff
6593                         $formats_nav .= ' (initial)';
6594                 } elsif (scalar @{$co{'parents'}} == 1) {
6595                         # single parent commit
6596                         $formats_nav .=
6597                                 ' (parent: ' .
6598                                 $cgi->a({-href => href(action=>"commitdiff",
6599                                                        hash=>$co{'parent'})},
6600                                         esc_html(substr($co{'parent'}, 0, 7))) .
6601                                 ')';
6602                 } else {
6603                         # merge commit
6604                         if ($hash_parent eq '--cc') {
6605                                 $formats_nav .= ' | ' .
6606                                         $cgi->a({-href => href(action=>"commitdiff",
6607                                                                hash=>$hash, hash_parent=>'-c')},
6608                                                 'combined');
6609                         } else { # $hash_parent eq '-c'
6610                                 $formats_nav .= ' | ' .
6611                                         $cgi->a({-href => href(action=>"commitdiff",
6612                                                                hash=>$hash, hash_parent=>'--cc')},
6613                                                 'compact');
6614                         }
6615                         $formats_nav .=
6616                                 ' (merge: ' .
6617                                 join(' ', map {
6618                                         $cgi->a({-href => href(action=>"commitdiff",
6619                                                                hash=>$_)},
6620                                                 esc_html(substr($_, 0, 7)));
6621                                 } @{$co{'parents'}} ) .
6622                                 ')';
6623                 }
6624         }
6625
6626         my $hash_parent_param = $hash_parent;
6627         if (!defined $hash_parent_param) {
6628                 # --cc for multiple parents, --root for parentless
6629                 $hash_parent_param =
6630                         @{$co{'parents'}} > 1 ? '--cc' : $co{'parent'} || '--root';
6631         }
6632
6633         # read commitdiff
6634         my $fd;
6635         my @difftree;
6636         if ($format eq 'html') {
6637                 open $fd, "-|", git_cmd(), "diff-tree", '-r', @diff_opts,
6638                         "--no-commit-id", "--patch-with-raw", "--full-index",
6639                         $hash_parent_param, $hash, "--"
6640                         or die_error(500, "Open git-diff-tree failed");
6641
6642                 while (my $line = <$fd>) {
6643                         chomp $line;
6644                         # empty line ends raw part of diff-tree output
6645                         last unless $line;
6646                         push @difftree, scalar parse_difftree_raw_line($line);
6647                 }
6648
6649         } elsif ($format eq 'plain') {
6650                 open $fd, "-|", git_cmd(), "diff-tree", '-r', @diff_opts,
6651                         '-p', $hash_parent_param, $hash, "--"
6652                         or die_error(500, "Open git-diff-tree failed");
6653         } elsif ($format eq 'patch') {
6654                 # For commit ranges, we limit the output to the number of
6655                 # patches specified in the 'patches' feature.
6656                 # For single commits, we limit the output to a single patch,
6657                 # diverging from the git-format-patch default.
6658                 my @commit_spec = ();
6659                 if ($hash_parent) {
6660                         if ($patch_max > 0) {
6661                                 push @commit_spec, "-$patch_max";
6662                         }
6663                         push @commit_spec, '-n', "$hash_parent..$hash";
6664                 } else {
6665                         if ($params{-single}) {
6666                                 push @commit_spec, '-1';
6667                         } else {
6668                                 if ($patch_max > 0) {
6669                                         push @commit_spec, "-$patch_max";
6670                                 }
6671                                 push @commit_spec, "-n";
6672                         }
6673                         push @commit_spec, '--root', $hash;
6674                 }
6675                 open $fd, "-|", git_cmd(), "format-patch", @diff_opts,
6676                         '--encoding=utf8', '--stdout', @commit_spec
6677                         or die_error(500, "Open git-format-patch failed");
6678         } else {
6679                 die_error(400, "Unknown commitdiff format");
6680         }
6681
6682         # non-textual hash id's can be cached
6683         my $expires;
6684         if ($hash =~ m/^[0-9a-fA-F]{40}$/) {
6685                 $expires = "+1d";
6686         }
6687
6688         # write commit message
6689         if ($format eq 'html') {
6690                 my $refs = git_get_references();
6691                 my $ref = format_ref_marker($refs, $co{'id'});
6692
6693                 git_header_html(undef, $expires);
6694                 git_print_page_nav('commitdiff','', $hash,$co{'tree'},$hash, $formats_nav);
6695                 git_print_header_div('commit', esc_html($co{'title'}) . $ref, $hash);
6696                 print "<div class=\"title_text\">\n" .
6697                       "<table class=\"object_header\">\n";
6698                 git_print_authorship_rows(\%co);
6699                 print "</table>".
6700                       "</div>\n";
6701                 print "<div class=\"page_body\">\n";
6702                 if (@{$co{'comment'}} > 1) {
6703                         print "<div class=\"log\">\n";
6704                         git_print_log($co{'comment'}, -final_empty_line=> 1, -remove_title => 1);
6705                         print "</div>\n"; # class="log"
6706                 }
6707
6708         } elsif ($format eq 'plain') {
6709                 my $refs = git_get_references("tags");
6710                 my $tagname = git_get_rev_name_tags($hash);
6711                 my $filename = basename($project) . "-$hash.patch";
6712
6713                 print $cgi->header(
6714                         -type => 'text/plain',
6715                         -charset => 'utf-8',
6716                         -expires => $expires,
6717                         -content_disposition => 'inline; filename="' . "$filename" . '"');
6718                 my %ad = parse_date($co{'author_epoch'}, $co{'author_tz'});
6719                 print "From: " . to_utf8($co{'author'}) . "\n";
6720                 print "Date: $ad{'rfc2822'} ($ad{'tz_local'})\n";
6721                 print "Subject: " . to_utf8($co{'title'}) . "\n";
6722
6723                 print "X-Git-Tag: $tagname\n" if $tagname;
6724                 print "X-Git-Url: " . $cgi->self_url() . "\n\n";
6725
6726                 foreach my $line (@{$co{'comment'}}) {
6727                         print to_utf8($line) . "\n";
6728                 }
6729                 print "---\n\n";
6730         } elsif ($format eq 'patch') {
6731                 my $filename = basename($project) . "-$hash.patch";
6732
6733                 print $cgi->header(
6734                         -type => 'text/plain',
6735                         -charset => 'utf-8',
6736                         -expires => $expires,
6737                         -content_disposition => 'inline; filename="' . "$filename" . '"');
6738         }
6739
6740         # write patch
6741         if ($format eq 'html') {
6742                 my $use_parents = !defined $hash_parent ||
6743                         $hash_parent eq '-c' || $hash_parent eq '--cc';
6744                 git_difftree_body(\@difftree, $hash,
6745                                   $use_parents ? @{$co{'parents'}} : $hash_parent);
6746                 print "<br/>\n";
6747
6748                 git_patchset_body($fd, \@difftree, $hash,
6749                                   $use_parents ? @{$co{'parents'}} : $hash_parent);
6750                 close $fd;
6751                 print "</div>\n"; # class="page_body"
6752                 git_footer_html();
6753
6754         } elsif ($format eq 'plain') {
6755                 local $/ = undef;
6756                 print <$fd>;
6757                 close $fd
6758                         or print "Reading git-diff-tree failed\n";
6759         } elsif ($format eq 'patch') {
6760                 local $/ = undef;
6761                 print <$fd>;
6762                 close $fd
6763                         or print "Reading git-format-patch failed\n";
6764         }
6765 }
6766
6767 sub git_commitdiff_plain {
6768         git_commitdiff(-format => 'plain');
6769 }
6770
6771 # format-patch-style patches
6772 sub git_patch {
6773         git_commitdiff(-format => 'patch', -single => 1);
6774 }
6775
6776 sub git_patches {
6777         git_commitdiff(-format => 'patch');
6778 }
6779
6780 sub git_history {
6781         git_log_generic('history', \&git_history_body,
6782                         $hash_base, $hash_parent_base,
6783                         $file_name, $hash);
6784 }
6785
6786 sub git_search {
6787         gitweb_check_feature('search') or die_error(403, "Search is disabled");
6788         if (!defined $searchtext) {
6789                 die_error(400, "Text field is empty");
6790         }
6791         if (!defined $hash) {
6792                 $hash = git_get_head_hash($project);
6793         }
6794         my %co = parse_commit($hash);
6795         if (!%co) {
6796                 die_error(404, "Unknown commit object");
6797         }
6798         if (!defined $page) {
6799                 $page = 0;
6800         }
6801
6802         $searchtype ||= 'commit';
6803         if ($searchtype eq 'pickaxe') {
6804                 # pickaxe may take all resources of your box and run for several minutes
6805                 # with every query - so decide by yourself how public you make this feature
6806                 gitweb_check_feature('pickaxe')
6807                     or die_error(403, "Pickaxe is disabled");
6808         }
6809         if ($searchtype eq 'grep') {
6810                 gitweb_check_feature('grep')[0]
6811                     or die_error(403, "Grep is disabled");
6812         }
6813
6814         git_header_html();
6815
6816         if ($searchtype eq 'commit' or $searchtype eq 'author' or $searchtype eq 'committer') {
6817                 my $greptype;
6818                 if ($searchtype eq 'commit') {
6819                         $greptype = "--grep=";
6820                 } elsif ($searchtype eq 'author') {
6821                         $greptype = "--author=";
6822                 } elsif ($searchtype eq 'committer') {
6823                         $greptype = "--committer=";
6824                 }
6825                 $greptype .= $searchtext;
6826                 my @commitlist = parse_commits($hash, 101, (100 * $page), undef,
6827                                                $greptype, '--regexp-ignore-case',
6828                                                $search_use_regexp ? '--extended-regexp' : '--fixed-strings');
6829
6830                 my $paging_nav = '';
6831                 if ($page > 0) {
6832                         $paging_nav .=
6833                                 $cgi->a({-href => href(action=>"search", hash=>$hash,
6834                                                        searchtext=>$searchtext,
6835                                                        searchtype=>$searchtype)},
6836                                         "first");
6837                         $paging_nav .= " &sdot; " .
6838                                 $cgi->a({-href => href(-replay=>1, page=>$page-1),
6839                                          -accesskey => "p", -title => "Alt-p"}, "prev");
6840                 } else {
6841                         $paging_nav .= "first";
6842                         $paging_nav .= " &sdot; prev";
6843                 }
6844                 my $next_link = '';
6845                 if ($#commitlist >= 100) {
6846                         $next_link =
6847                                 $cgi->a({-href => href(-replay=>1, page=>$page+1),
6848                                          -accesskey => "n", -title => "Alt-n"}, "next");
6849                         $paging_nav .= " &sdot; $next_link";
6850                 } else {
6851                         $paging_nav .= " &sdot; next";
6852                 }
6853
6854                 git_print_page_nav('','', $hash,$co{'tree'},$hash, $paging_nav);
6855                 git_print_header_div('commit', esc_html($co{'title'}), $hash);
6856                 if ($page == 0 && !@commitlist) {
6857                         print "<p>No match.</p>\n";
6858                 } else {
6859                         git_search_grep_body(\@commitlist, 0, 99, $next_link);
6860                 }
6861         }
6862
6863         if ($searchtype eq 'pickaxe') {
6864                 git_print_page_nav('','', $hash,$co{'tree'},$hash);
6865                 git_print_header_div('commit', esc_html($co{'title'}), $hash);
6866
6867                 print "<table class=\"pickaxe search\">\n";
6868                 my $alternate = 1;
6869                 local $/ = "\n";
6870                 open my $fd, '-|', git_cmd(), '--no-pager', 'log', @diff_opts,
6871                         '--pretty=format:%H', '--no-abbrev', '--raw', "-S$searchtext",
6872                         ($search_use_regexp ? '--pickaxe-regex' : ());
6873                 undef %co;
6874                 my @files;
6875                 while (my $line = <$fd>) {
6876                         chomp $line;
6877                         next unless $line;
6878
6879                         my %set = parse_difftree_raw_line($line);
6880                         if (defined $set{'commit'}) {
6881                                 # finish previous commit
6882                                 if (%co) {
6883                                         print "</td>\n" .
6884                                               "<td class=\"link\">" .
6885                                               $cgi->a({-href => href(action=>"commit", hash=>$co{'id'})}, "commit") .
6886                                               " | " .
6887                                               $cgi->a({-href => href(action=>"tree", hash=>$co{'tree'}, hash_base=>$co{'id'})}, "tree");
6888                                         print "</td>\n" .
6889                                               "</tr>\n";
6890                                 }
6891
6892                                 if ($alternate) {
6893                                         print "<tr class=\"dark\">\n";
6894                                 } else {
6895                                         print "<tr class=\"light\">\n";
6896                                 }
6897                                 $alternate ^= 1;
6898                                 %co = parse_commit($set{'commit'});
6899                                 my $author = chop_and_escape_str($co{'author_name'}, 15, 5);
6900                                 print "<td title=\"$co{'age_string_age'}\"><i>$co{'age_string_date'}</i></td>\n" .
6901                                       "<td><i>$author</i></td>\n" .
6902                                       "<td>" .
6903                                       $cgi->a({-href => href(action=>"commit", hash=>$co{'id'}),
6904                                               -class => "list subject"},
6905                                               chop_and_escape_str($co{'title'}, 50) . "<br/>");
6906                         } elsif (defined $set{'to_id'}) {
6907                                 next if ($set{'to_id'} =~ m/^0{40}$/);
6908
6909                                 print $cgi->a({-href => href(action=>"blob", hash_base=>$co{'id'},
6910                                                              hash=>$set{'to_id'}, file_name=>$set{'to_file'}),
6911                                               -class => "list"},
6912                                               "<span class=\"match\">" . esc_path($set{'file'}) . "</span>") .
6913                                       "<br/>\n";
6914                         }
6915                 }
6916                 close $fd;
6917
6918                 # finish last commit (warning: repetition!)
6919                 if (%co) {
6920                         print "</td>\n" .
6921                               "<td class=\"link\">" .
6922                               $cgi->a({-href => href(action=>"commit", hash=>$co{'id'})}, "commit") .
6923                               " | " .
6924                               $cgi->a({-href => href(action=>"tree", hash=>$co{'tree'}, hash_base=>$co{'id'})}, "tree");
6925                         print "</td>\n" .
6926                               "</tr>\n";
6927                 }
6928
6929                 print "</table>\n";
6930         }
6931
6932         if ($searchtype eq 'grep') {
6933                 git_print_page_nav('','', $hash,$co{'tree'},$hash);
6934                 git_print_header_div('commit', esc_html($co{'title'}), $hash);
6935
6936                 print "<table class=\"grep_search\">\n";
6937                 my $alternate = 1;
6938                 my $matches = 0;
6939                 local $/ = "\n";
6940                 open my $fd, "-|", git_cmd(), 'grep', '-n',
6941                         $search_use_regexp ? ('-E', '-i') : '-F',
6942                         $searchtext, $co{'tree'};
6943                 my $lastfile = '';
6944                 while (my $line = <$fd>) {
6945                         chomp $line;
6946                         my ($file, $lno, $ltext, $binary);
6947                         last if ($matches++ > 1000);
6948                         if ($line =~ /^Binary file (.+) matches$/) {
6949                                 $file = $1;
6950                                 $binary = 1;
6951                         } else {
6952                                 (undef, $file, $lno, $ltext) = split(/:/, $line, 4);
6953                         }
6954                         if ($file ne $lastfile) {
6955                                 $lastfile and print "</td></tr>\n";
6956                                 if ($alternate++) {
6957                                         print "<tr class=\"dark\">\n";
6958                                 } else {
6959                                         print "<tr class=\"light\">\n";
6960                                 }
6961                                 print "<td class=\"list\">".
6962                                         $cgi->a({-href => href(action=>"blob", hash=>$co{'hash'},
6963                                                                file_name=>"$file"),
6964                                                 -class => "list"}, esc_path($file));
6965                                 print "</td><td>\n";
6966                                 $lastfile = $file;
6967                         }
6968                         if ($binary) {
6969                                 print "<div class=\"binary\">Binary file</div>\n";
6970                         } else {
6971                                 $ltext = untabify($ltext);
6972                                 if ($ltext =~ m/^(.*)($search_regexp)(.*)$/i) {
6973                                         $ltext = esc_html($1, -nbsp=>1);
6974                                         $ltext .= '<span class="match">';
6975                                         $ltext .= esc_html($2, -nbsp=>1);
6976                                         $ltext .= '</span>';
6977                                         $ltext .= esc_html($3, -nbsp=>1);
6978                                 } else {
6979                                         $ltext = esc_html($ltext, -nbsp=>1);
6980                                 }
6981                                 print "<div class=\"pre\">" .
6982                                         $cgi->a({-href => href(action=>"blob", hash=>$co{'hash'},
6983                                                                file_name=>"$file").'#l'.$lno,
6984                                                 -class => "linenr"}, sprintf('%4i', $lno))
6985                                         . ' ' .  $ltext . "</div>\n";
6986                         }
6987                 }
6988                 if ($lastfile) {
6989                         print "</td></tr>\n";
6990                         if ($matches > 1000) {
6991                                 print "<div class=\"diff nodifferences\">Too many matches, listing trimmed</div>\n";
6992                         }
6993                 } else {
6994                         print "<div class=\"diff nodifferences\">No matches found</div>\n";
6995                 }
6996                 close $fd;
6997
6998                 print "</table>\n";
6999         }
7000         git_footer_html();
7001 }
7002
7003 sub git_search_help {
7004         git_header_html();
7005         git_print_page_nav('','', $hash,$hash,$hash);
7006         print <<EOT;
7007 <p><strong>Pattern</strong> is by default a normal string that is matched precisely (but without
7008 regard to case, except in the case of pickaxe). However, when you check the <em>re</em> checkbox,
7009 the pattern entered is recognized as the POSIX extended
7010 <a href="http://en.wikipedia.org/wiki/Regular_expression">regular expression</a> (also case
7011 insensitive).</p>
7012 <dl>
7013 <dt><b>commit</b></dt>
7014 <dd>The commit messages and authorship information will be scanned for the given pattern.</dd>
7015 EOT
7016         my $have_grep = gitweb_check_feature('grep');
7017         if ($have_grep) {
7018                 print <<EOT;
7019 <dt><b>grep</b></dt>
7020 <dd>All files in the currently selected tree (HEAD unless you are explicitly browsing
7021     a different one) are searched for the given pattern. On large trees, this search can take
7022 a while and put some strain on the server, so please use it with some consideration. Note that
7023 due to git-grep peculiarity, currently if regexp mode is turned off, the matches are
7024 case-sensitive.</dd>
7025 EOT
7026         }
7027         print <<EOT;
7028 <dt><b>author</b></dt>
7029 <dd>Name and e-mail of the change author and date of birth of the patch will be scanned for the given pattern.</dd>
7030 <dt><b>committer</b></dt>
7031 <dd>Name and e-mail of the committer and date of commit will be scanned for the given pattern.</dd>
7032 EOT
7033         my $have_pickaxe = gitweb_check_feature('pickaxe');
7034         if ($have_pickaxe) {
7035                 print <<EOT;
7036 <dt><b>pickaxe</b></dt>
7037 <dd>All commits that caused the string to appear or disappear from any file (changes that
7038 added, removed or "modified" the string) will be listed. This search can take a while and
7039 takes a lot of strain on the server, so please use it wisely. Note that since you may be
7040 interested even in changes just changing the case as well, this search is case sensitive.</dd>
7041 EOT
7042         }
7043         print "</dl>\n";
7044         git_footer_html();
7045 }
7046
7047 sub git_shortlog {
7048         git_log_generic('shortlog', \&git_shortlog_body,
7049                         $hash, $hash_parent);
7050 }
7051
7052 ## ......................................................................
7053 ## feeds (RSS, Atom; OPML)
7054
7055 sub git_feed {
7056         my $format = shift || 'atom';
7057         my $have_blame = gitweb_check_feature('blame');
7058
7059         # Atom: http://www.atomenabled.org/developers/syndication/
7060         # RSS:  http://www.notestips.com/80256B3A007F2692/1/NAMO5P9UPQ
7061         if ($format ne 'rss' && $format ne 'atom') {
7062                 die_error(400, "Unknown web feed format");
7063         }
7064
7065         # log/feed of current (HEAD) branch, log of given branch, history of file/directory
7066         my $head = $hash || 'HEAD';
7067         my @commitlist = parse_commits($head, 150, 0, $file_name);
7068
7069         my %latest_commit;
7070         my %latest_date;
7071         my $content_type = "application/$format+xml";
7072         if (defined $cgi->http('HTTP_ACCEPT') &&
7073                  $cgi->Accept('text/xml') > $cgi->Accept($content_type)) {
7074                 # browser (feed reader) prefers text/xml
7075                 $content_type = 'text/xml';
7076         }
7077         if (defined($commitlist[0])) {
7078                 %latest_commit = %{$commitlist[0]};
7079                 my $latest_epoch = $latest_commit{'committer_epoch'};
7080                 %latest_date   = parse_date($latest_epoch, $latest_commit{'comitter_tz'});
7081                 my $if_modified = $cgi->http('IF_MODIFIED_SINCE');
7082                 if (defined $if_modified) {
7083                         my $since;
7084                         if (eval { require HTTP::Date; 1; }) {
7085                                 $since = HTTP::Date::str2time($if_modified);
7086                         } elsif (eval { require Time::ParseDate; 1; }) {
7087                                 $since = Time::ParseDate::parsedate($if_modified, GMT => 1);
7088                         }
7089                         if (defined $since && $latest_epoch <= $since) {
7090                                 print $cgi->header(
7091                                         -type => $content_type,
7092                                         -charset => 'utf-8',
7093                                         -last_modified => $latest_date{'rfc2822'},
7094                                         -status => '304 Not Modified');
7095                                 return;
7096                         }
7097                 }
7098                 print $cgi->header(
7099                         -type => $content_type,
7100                         -charset => 'utf-8',
7101                         -last_modified => $latest_date{'rfc2822'});
7102         } else {
7103                 print $cgi->header(
7104                         -type => $content_type,
7105                         -charset => 'utf-8');
7106         }
7107
7108         # Optimization: skip generating the body if client asks only
7109         # for Last-Modified date.
7110         return if ($cgi->request_method() eq 'HEAD');
7111
7112         # header variables
7113         my $title = "$site_name - $project/$action";
7114         my $feed_type = 'log';
7115         if (defined $hash) {
7116                 $title .= " - '$hash'";
7117                 $feed_type = 'branch log';
7118                 if (defined $file_name) {
7119                         $title .= " :: $file_name";
7120                         $feed_type = 'history';
7121                 }
7122         } elsif (defined $file_name) {
7123                 $title .= " - $file_name";
7124                 $feed_type = 'history';
7125         }
7126         $title .= " $feed_type";
7127         my $descr = git_get_project_description($project);
7128         if (defined $descr) {
7129                 $descr = esc_html($descr);
7130         } else {
7131                 $descr = "$project " .
7132                          ($format eq 'rss' ? 'RSS' : 'Atom') .
7133                          " feed";
7134         }
7135         my $owner = git_get_project_owner($project);
7136         $owner = esc_html($owner);
7137
7138         #header
7139         my $alt_url;
7140         if (defined $file_name) {
7141                 $alt_url = href(-full=>1, action=>"history", hash=>$hash, file_name=>$file_name);
7142         } elsif (defined $hash) {
7143                 $alt_url = href(-full=>1, action=>"log", hash=>$hash);
7144         } else {
7145                 $alt_url = href(-full=>1, action=>"summary");
7146         }
7147         print qq!<?xml version="1.0" encoding="utf-8"?>\n!;
7148         if ($format eq 'rss') {
7149                 print <<XML;
7150 <rss version="2.0" xmlns:content="http://purl.org/rss/1.0/modules/content/">
7151 <channel>
7152 XML
7153                 print "<title>$title</title>\n" .
7154                       "<link>$alt_url</link>\n" .
7155                       "<description>$descr</description>\n" .
7156                       "<language>en</language>\n" .
7157                       # project owner is responsible for 'editorial' content
7158                       "<managingEditor>$owner</managingEditor>\n";
7159                 if (defined $logo || defined $favicon) {
7160                         # prefer the logo to the favicon, since RSS
7161                         # doesn't allow both
7162                         my $img = esc_url($logo || $favicon);
7163                         print "<image>\n" .
7164                               "<url>$img</url>\n" .
7165                               "<title>$title</title>\n" .
7166                               "<link>$alt_url</link>\n" .
7167                               "</image>\n";
7168                 }
7169                 if (%latest_date) {
7170                         print "<pubDate>$latest_date{'rfc2822'}</pubDate>\n";
7171                         print "<lastBuildDate>$latest_date{'rfc2822'}</lastBuildDate>\n";
7172                 }
7173                 print "<generator>gitweb v.$version/$git_version</generator>\n";
7174         } elsif ($format eq 'atom') {
7175                 print <<XML;
7176 <feed xmlns="http://www.w3.org/2005/Atom">
7177 XML
7178                 print "<title>$title</title>\n" .
7179                       "<subtitle>$descr</subtitle>\n" .
7180                       '<link rel="alternate" type="text/html" href="' .
7181                       $alt_url . '" />' . "\n" .
7182                       '<link rel="self" type="' . $content_type . '" href="' .
7183                       $cgi->self_url() . '" />' . "\n" .
7184                       "<id>" . href(-full=>1) . "</id>\n" .
7185                       # use project owner for feed author
7186                       "<author><name>$owner</name></author>\n";
7187                 if (defined $favicon) {
7188                         print "<icon>" . esc_url($favicon) . "</icon>\n";
7189                 }
7190                 if (defined $logo) {
7191                         # not twice as wide as tall: 72 x 27 pixels
7192                         print "<logo>" . esc_url($logo) . "</logo>\n";
7193                 }
7194                 if (! %latest_date) {
7195                         # dummy date to keep the feed valid until commits trickle in:
7196                         print "<updated>1970-01-01T00:00:00Z</updated>\n";
7197                 } else {
7198                         print "<updated>$latest_date{'iso-8601'}</updated>\n";
7199                 }
7200                 print "<generator version='$version/$git_version'>gitweb</generator>\n";
7201         }
7202
7203         # contents
7204         for (my $i = 0; $i <= $#commitlist; $i++) {
7205                 my %co = %{$commitlist[$i]};
7206                 my $commit = $co{'id'};
7207                 # we read 150, we always show 30 and the ones more recent than 48 hours
7208                 if (($i >= 20) && ((time - $co{'author_epoch'}) > 48*60*60)) {
7209                         last;
7210                 }
7211                 my %cd = parse_date($co{'author_epoch'}, $co{'author_tz'});
7212
7213                 # get list of changed files
7214                 open my $fd, "-|", git_cmd(), "diff-tree", '-r', @diff_opts,
7215                         $co{'parent'} || "--root",
7216                         $co{'id'}, "--", (defined $file_name ? $file_name : ())
7217                         or next;
7218                 my @difftree = map { chomp; $_ } <$fd>;
7219                 close $fd
7220                         or next;
7221
7222                 # print element (entry, item)
7223                 my $co_url = href(-full=>1, action=>"commitdiff", hash=>$commit);
7224                 if ($format eq 'rss') {
7225                         print "<item>\n" .
7226                               "<title>" . esc_html($co{'title'}) . "</title>\n" .
7227                               "<author>" . esc_html($co{'author'}) . "</author>\n" .
7228                               "<pubDate>$cd{'rfc2822'}</pubDate>\n" .
7229                               "<guid isPermaLink=\"true\">$co_url</guid>\n" .
7230                               "<link>$co_url</link>\n" .
7231                               "<description>" . esc_html($co{'title'}) . "</description>\n" .
7232                               "<content:encoded>" .
7233                               "<![CDATA[\n";
7234                 } elsif ($format eq 'atom') {
7235                         print "<entry>\n" .
7236                               "<title type=\"html\">" . esc_html($co{'title'}) . "</title>\n" .
7237                               "<updated>$cd{'iso-8601'}</updated>\n" .
7238                               "<author>\n" .
7239                               "  <name>" . esc_html($co{'author_name'}) . "</name>\n";
7240                         if ($co{'author_email'}) {
7241                                 print "  <email>" . esc_html($co{'author_email'}) . "</email>\n";
7242                         }
7243                         print "</author>\n" .
7244                               # use committer for contributor
7245                               "<contributor>\n" .
7246                               "  <name>" . esc_html($co{'committer_name'}) . "</name>\n";
7247                         if ($co{'committer_email'}) {
7248                                 print "  <email>" . esc_html($co{'committer_email'}) . "</email>\n";
7249                         }
7250                         print "</contributor>\n" .
7251                               "<published>$cd{'iso-8601'}</published>\n" .
7252                               "<link rel=\"alternate\" type=\"text/html\" href=\"$co_url\" />\n" .
7253                               "<id>$co_url</id>\n" .
7254                               "<content type=\"xhtml\" xml:base=\"" . esc_url($my_url) . "\">\n" .
7255                               "<div xmlns=\"http://www.w3.org/1999/xhtml\">\n";
7256                 }
7257                 my $comment = $co{'comment'};
7258                 print "<pre>\n";
7259                 foreach my $line (@$comment) {
7260                         $line = esc_html($line);
7261                         print "$line\n";
7262                 }
7263                 print "</pre><ul>\n";
7264                 foreach my $difftree_line (@difftree) {
7265                         my %difftree = parse_difftree_raw_line($difftree_line);
7266                         next if !$difftree{'from_id'};
7267
7268                         my $file = $difftree{'file'} || $difftree{'to_file'};
7269
7270                         print "<li>" .
7271                               "[" .
7272                               $cgi->a({-href => href(-full=>1, action=>"blobdiff",
7273                                                      hash=>$difftree{'to_id'}, hash_parent=>$difftree{'from_id'},
7274                                                      hash_base=>$co{'id'}, hash_parent_base=>$co{'parent'},
7275                                                      file_name=>$file, file_parent=>$difftree{'from_file'}),
7276                                       -title => "diff"}, 'D');
7277                         if ($have_blame) {
7278                                 print $cgi->a({-href => href(-full=>1, action=>"blame",
7279                                                              file_name=>$file, hash_base=>$commit),
7280                                               -title => "blame"}, 'B');
7281                         }
7282                         # if this is not a feed of a file history
7283                         if (!defined $file_name || $file_name ne $file) {
7284                                 print $cgi->a({-href => href(-full=>1, action=>"history",
7285                                                              file_name=>$file, hash=>$commit),
7286                                               -title => "history"}, 'H');
7287                         }
7288                         $file = esc_path($file);
7289                         print "] ".
7290                               "$file</li>\n";
7291                 }
7292                 if ($format eq 'rss') {
7293                         print "</ul>]]>\n" .
7294                               "</content:encoded>\n" .
7295                               "</item>\n";
7296                 } elsif ($format eq 'atom') {
7297                         print "</ul>\n</div>\n" .
7298                               "</content>\n" .
7299                               "</entry>\n";
7300                 }
7301         }
7302
7303         # end of feed
7304         if ($format eq 'rss') {
7305                 print "</channel>\n</rss>\n";
7306         } elsif ($format eq 'atom') {
7307                 print "</feed>\n";
7308         }
7309 }
7310
7311 sub git_rss {
7312         git_feed('rss');
7313 }
7314
7315 sub git_atom {
7316         git_feed('atom');
7317 }
7318
7319 sub git_opml {
7320         my @list = git_get_projects_list();
7321
7322         print $cgi->header(
7323                 -type => 'text/xml',
7324                 -charset => 'utf-8',
7325                 -content_disposition => 'inline; filename="opml.xml"');
7326
7327         print <<XML;
7328 <?xml version="1.0" encoding="utf-8"?>
7329 <opml version="1.0">
7330 <head>
7331   <title>$site_name OPML Export</title>
7332 </head>
7333 <body>
7334 <outline text="git RSS feeds">
7335 XML
7336
7337         foreach my $pr (@list) {
7338                 my %proj = %$pr;
7339                 my $head = git_get_head_hash($proj{'path'});
7340                 if (!defined $head) {
7341                         next;
7342                 }
7343                 $git_dir = "$projectroot/$proj{'path'}";
7344                 my %co = parse_commit($head);
7345                 if (!%co) {
7346                         next;
7347                 }
7348
7349                 my $path = esc_html(chop_str($proj{'path'}, 25, 5));
7350                 my $rss  = href('project' => $proj{'path'}, 'action' => 'rss', -full => 1);
7351                 my $html = href('project' => $proj{'path'}, 'action' => 'summary', -full => 1);
7352                 print "<outline type=\"rss\" text=\"$path\" title=\"$path\" xmlUrl=\"$rss\" htmlUrl=\"$html\"/>\n";
7353         }
7354         print <<XML;
7355 </outline>
7356 </body>
7357 </opml>
7358 XML
7359 }