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 $path_info = decode_utf8($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 # html snippet to include in the <head> section of each page
  89 our $site_html_head_string = "++GITWEB_SITE_HTML_HEAD_STRING++";
  90 # filename of html text to include at top of each page
  91 our $site_header = "++GITWEB_SITE_HEADER++";
  92 # html text to include at home page
  93 our $home_text = "++GITWEB_HOMETEXT++";
  94 # filename of html text to include at bottom of each page
  95 our $site_footer = "++GITWEB_SITE_FOOTER++";
  96
  97 # URI of stylesheets
  98 our @stylesheets = ("++GITWEB_CSS++");
  99 # URI of a single stylesheet, which can be overridden in GITWEB_CONFIG.
 100 our $stylesheet = undef;
 101
 102 # URI of GIT logo (72x27 size)
 103 our $logo = "++GITWEB_LOGO++";
 104 # URI of GIT favicon, assumed to be image/png type
 105 our $favicon = "++GITWEB_FAVICON++";
 106 # URI of gitweb.js (JavaScript code for gitweb)
 107 our $javascript = "++GITWEB_JS++";
 108
 109 # URI and label (title) of GIT logo link
 110 #our $logo_url = "http://www.kernel.org/pub/software/scm/git/docs/";
 111 #our $logo_label = "git documentation";
 112 our $logo_url = "http://git-scm.com/";
 113 our $logo_label = "git homepage";
 114
 115 # source of projects list
 116 our $projects_list = "++GITWEB_LIST++";
 117
 118 # the width (in characters) of the projects list "Description" column
 119 our $projects_list_description_width = 25;
 120
 121 # group projects by category on the projects list
 122 # (enabled if this variable evaluates to true)
 123 our $projects_list_group_categories = 0;
 124
 125 # default category if none specified
 126 # (leave the empty string for no category)
 127 our $project_list_default_category = "";
 128
 129 # default order of projects list
 130 # valid values are none, project, descr, owner, and age
 131 our $default_projects_order = "project";
 132
 133 # show repository only if this file exists
 134 # (only effective if this variable evaluates to true)
 135 our $export_ok = "++GITWEB_EXPORT_OK++";
 136
 137 # show repository only if this subroutine returns true
 138 # when given the path to the project, for example:
 139 #    sub { return -e "$_[0]/git-daemon-export-ok"; }
 140 our $export_auth_hook = undef;
 141
 142 # only allow viewing of repositories also shown on the overview page
 143 our $strict_export = "++GITWEB_STRICT_EXPORT++";
 144
 145 # list of git base URLs used for URL to where fetch project from,
 146 # i.e. full URL is "$git_base_url/$project"
 147 our @git_base_url_list = grep { $_ ne '' } ("++GITWEB_BASE_URL++");
 148
 149 # default blob_plain mimetype and default charset for text/plain blob
 150 our $default_blob_plain_mimetype = 'text/plain';
 151 our $default_text_plain_charset  = undef;
 152
 153 # file to use for guessing MIME types before trying /etc/mime.types
 154 # (relative to the current git repository)
 155 our $mimetypes_file = undef;
 156
 157 # assume this charset if line contains non-UTF-8 characters;
 158 # it should be valid encoding (see Encoding::Supported(3pm) for list),
 159 # for which encoding all byte sequences are valid, for example
 160 # 'iso-8859-1' aka 'latin1' (it is decoded without checking, so it
 161 # could be even 'utf-8' for the old behavior)
 162 our $fallback_encoding = 'latin1';
 163
 164 # rename detection options for git-diff and git-diff-tree
 165 # - default is '-M', with the cost proportional to
 166 #   (number of removed files) * (number of new files).
 167 # - more costly is '-C' (which implies '-M'), with the cost proportional to
 168 #   (number of changed files + number of removed files) * (number of new files)
 169 # - even more costly is '-C', '--find-copies-harder' with cost
 170 #   (number of files in the original tree) * (number of new files)
 171 # - one might want to include '-B' option, e.g. '-B', '-M'
 172 our @diff_opts = ('-M'); # taken from git_commit
 173
 174 # Disables features that would allow repository owners to inject script into
 175 # the gitweb domain.
 176 our $prevent_xss = 0;
 177
 178 # Path to the highlight executable to use (must be the one from
 179 # http://www.andre-simon.de due to assumptions about parameters and output).
 180 # Useful if highlight is not installed on your webserver's PATH.
 181 # [Default: highlight]
 182 our $highlight_bin = "++HIGHLIGHT_BIN++";
 183
 184 # information about snapshot formats that gitweb is capable of serving
 185 our %known_snapshot_formats = (
 186         # name => {
 187         #       'display' => display name,
 188         #       'type' => mime type,
 189         #       'suffix' => filename suffix,
 190         #       'format' => --format for git-archive,
 191         #       'compressor' => [compressor command and arguments]
 192         #                       (array reference, optional)
 193         #       'disabled' => boolean (optional)}
 194         #
 195         'tgz' => {
 196                 'display' => 'tar.gz',
 197                 'type' => 'application/x-gzip',
 198                 'suffix' => '.tar.gz',
 199                 'format' => 'tar',
 200                 'compressor' => ['gzip', '-n']},
 201
 202         'tbz2' => {
 203                 'display' => 'tar.bz2',
 204                 'type' => 'application/x-bzip2',
 205                 'suffix' => '.tar.bz2',
 206                 'format' => 'tar',
 207                 'compressor' => ['bzip2']},
 208
 209         'txz' => {
 210                 'display' => 'tar.xz',
 211                 'type' => 'application/x-xz',
 212                 'suffix' => '.tar.xz',
 213                 'format' => 'tar',
 214                 'compressor' => ['xz'],
 215                 'disabled' => 1},
 216
 217         'zip' => {
 218                 'display' => 'zip',
 219                 'type' => 'application/x-zip',
 220                 'suffix' => '.zip',
 221                 'format' => 'zip'},
 222 );
 223
 224 # Aliases so we understand old gitweb.snapshot values in repository
 225 # configuration.
 226 our %known_snapshot_format_aliases = (
 227         'gzip'  => 'tgz',
 228         'bzip2' => 'tbz2',
 229         'xz'    => 'txz',
 230
 231         # backward compatibility: legacy gitweb config support
 232         'x-gzip' => undef, 'gz' => undef,
 233         'x-bzip2' => undef, 'bz2' => undef,
 234         'x-zip' => undef, '' => undef,
 235 );
 236
 237 # Pixel sizes for icons and avatars. If the default font sizes or lineheights
 238 # are changed, it may be appropriate to change these values too via
 239 # $GITWEB_CONFIG.
 240 our %avatar_size = (
 241         'default' => 16,
 242         'double'  => 32
 243 );
 244
 245 # Used to set the maximum load that we will still respond to gitweb queries.
 246 # If server load exceed this value then return "503 server busy" error.
 247 # If gitweb cannot determined server load, it is taken to be 0.
 248 # Leave it undefined (or set to 'undef') to turn off load checking.
 249 our $maxload = 300;
 250
 251 # configuration for 'highlight' (http://www.andre-simon.de/)
 252 # match by basename
 253 our %highlight_basename = (
 254         #'Program' => 'py',
 255         #'Library' => 'py',
 256         'SConstruct' => 'py', # SCons equivalent of Makefile
 257         'Makefile' => 'make',
 258 );
 259 # match by extension
 260 our %highlight_ext = (
 261         # main extensions, defining name of syntax;
 262         # see files in /usr/share/highlight/langDefs/ directory
 263         map { $_ => $_ }
 264                 qw(py c cpp rb java css php sh pl js tex bib xml awk bat ini spec tcl sql make),
 265         # alternate extensions, see /etc/highlight/filetypes.conf
 266         'h' => 'c',
 267         map { $_ => 'sh'  } qw(bash zsh ksh),
 268         map { $_ => 'cpp' } qw(cxx c++ cc),
 269         map { $_ => 'php' } qw(php3 php4 php5 phps),
 270         map { $_ => 'pl'  } qw(perl pm), # perhaps also 'cgi'
 271         map { $_ => 'make'} qw(mak mk),
 272         map { $_ => 'xml' } qw(xhtml html htm),
 273 );
 274
 275 # You define site-wide feature defaults here; override them with
 276 # $GITWEB_CONFIG as necessary.
 277 our %feature = (
 278         # feature => {
 279         #       'sub' => feature-sub (subroutine),
 280         #       'override' => allow-override (boolean),
 281         #       'default' => [ default options...] (array reference)}
 282         #
 283         # if feature is overridable (it means that allow-override has true value),
 284         # then feature-sub will be called with default options as parameters;
 285         # return value of feature-sub indicates if to enable specified feature
 286         #
 287         # if there is no 'sub' key (no feature-sub), then feature cannot be
 288         # overridden
 289         #
 290         # use gitweb_get_feature(<feature>) to retrieve the <feature> value
 291         # (an array) or gitweb_check_feature(<feature>) to check if <feature>
 292         # is enabled
 293
 294         # Enable the 'blame' blob view, showing the last commit that modified
 295         # each line in the file. This can be very CPU-intensive.
 296
 297         # To enable system wide have in $GITWEB_CONFIG
 298         # $feature{'blame'}{'default'} = [1];
 299         # To have project specific config enable override in $GITWEB_CONFIG
 300         # $feature{'blame'}{'override'} = 1;
 301         # and in project config gitweb.blame = 0|1;
 302         'blame' => {
 303                 'sub' => sub { feature_bool('blame', @_) },
 304                 'override' => 0,
 305                 'default' => [0]},
 306
 307         # Enable the 'snapshot' link, providing a compressed archive of any
 308         # tree. This can potentially generate high traffic if you have large
 309         # project.
 310
 311         # Value is a list of formats defined in %known_snapshot_formats that
 312         # you wish to offer.
 313         # To disable system wide have in $GITWEB_CONFIG
 314         # $feature{'snapshot'}{'default'} = [];
 315         # To have project specific config enable override in $GITWEB_CONFIG
 316         # $feature{'snapshot'}{'override'} = 1;
 317         # and in project config, a comma-separated list of formats or "none"
 318         # to disable.  Example: gitweb.snapshot = tbz2,zip;
 319         'snapshot' => {
 320                 'sub' => \&feature_snapshot,
 321                 'override' => 0,
 322                 'default' => ['tgz']},
 323
 324         # Enable text search, which will list the commits which match author,
 325         # committer or commit text to a given string.  Enabled by default.
 326         # Project specific override is not supported.
 327         #
 328         # Note that this controls all search features, which means that if
 329         # it is disabled, then 'grep' and 'pickaxe' search would also be
 330         # disabled.
 331         'search' => {
 332                 'override' => 0,
 333                 'default' => [1]},
 334
 335         # Enable grep search, which will list the files in currently selected
 336         # tree containing the given string. Enabled by default. This can be
 337         # potentially CPU-intensive, of course.
 338         # Note that you need to have 'search' feature enabled too.
 339
 340         # To enable system wide have in $GITWEB_CONFIG
 341         # $feature{'grep'}{'default'} = [1];
 342         # To have project specific config enable override in $GITWEB_CONFIG
 343         # $feature{'grep'}{'override'} = 1;
 344         # and in project config gitweb.grep = 0|1;
 345         'grep' => {
 346                 'sub' => sub { feature_bool('grep', @_) },
 347                 'override' => 0,
 348                 'default' => [1]},
 349
 350         # Enable the pickaxe search, which will list the commits that modified
 351         # a given string in a file. This can be practical and quite faster
 352         # alternative to 'blame', but still potentially CPU-intensive.
 353         # Note that you need to have 'search' feature enabled too.
 354
 355         # To enable system wide have in $GITWEB_CONFIG
 356         # $feature{'pickaxe'}{'default'} = [1];
 357         # To have project specific config enable override in $GITWEB_CONFIG
 358         # $feature{'pickaxe'}{'override'} = 1;
 359         # and in project config gitweb.pickaxe = 0|1;
 360         'pickaxe' => {
 361                 'sub' => sub { feature_bool('pickaxe', @_) },
 362                 'override' => 0,
 363                 'default' => [1]},
 364
 365         # Enable showing size of blobs in a 'tree' view, in a separate
 366         # column, similar to what 'ls -l' does.  This cost a bit of IO.
 367
 368         # To disable system wide have in $GITWEB_CONFIG
 369         # $feature{'show-sizes'}{'default'} = [0];
 370         # To have project specific config enable override in $GITWEB_CONFIG
 371         # $feature{'show-sizes'}{'override'} = 1;
 372         # and in project config gitweb.showsizes = 0|1;
 373         'show-sizes' => {
 374                 'sub' => sub { feature_bool('showsizes', @_) },
 375                 'override' => 0,
 376                 'default' => [1]},
 377
 378         # Make gitweb use an alternative format of the URLs which can be
 379         # more readable and natural-looking: project name is embedded
 380         # directly in the path and the query string contains other
 381         # auxiliary information. All gitweb installations recognize
 382         # URL in either format; this configures in which formats gitweb
 383         # generates links.
 384
 385         # To enable system wide have in $GITWEB_CONFIG
 386         # $feature{'pathinfo'}{'default'} = [1];
 387         # Project specific override is not supported.
 388
 389         # Note that you will need to change the default location of CSS,
 390         # favicon, logo and possibly other files to an absolute URL. Also,
 391         # if gitweb.cgi serves as your indexfile, you will need to force
 392         # $my_uri to contain the script name in your $GITWEB_CONFIG.
 393         'pathinfo' => {
 394                 'override' => 0,
 395                 'default' => [0]},
 396
 397         # Make gitweb consider projects in project root subdirectories
 398         # to be forks of existing projects. Given project $projname.git,
 399         # projects matching $projname/*.git will not be shown in the main
 400         # projects list, instead a '+' mark will be added to $projname
 401         # there and a 'forks' view will be enabled for the project, listing
 402         # all the forks. If project list is taken from a file, forks have
 403         # to be listed after the main project.
 404
 405         # To enable system wide have in $GITWEB_CONFIG
 406         # $feature{'forks'}{'default'} = [1];
 407         # Project specific override is not supported.
 408         'forks' => {
 409                 'override' => 0,
 410                 'default' => [0]},
 411
 412         # Insert custom links to the action bar of all project pages.
 413         # This enables you mainly to link to third-party scripts integrating
 414         # into gitweb; e.g. git-browser for graphical history representation
 415         # or custom web-based repository administration interface.
 416
 417         # The 'default' value consists of a list of triplets in the form
 418         # (label, link, position) where position is the label after which
 419         # to insert the link and link is a format string where %n expands
 420         # to the project name, %f to the project path within the filesystem,
 421         # %h to the current hash (h gitweb parameter) and %b to the current
 422         # hash base (hb gitweb parameter); %% expands to %.
 423
 424         # To enable system wide have in $GITWEB_CONFIG e.g.
 425         # $feature{'actions'}{'default'} = [('graphiclog',
 426         #       '/git-browser/by-commit.html?r=%n', 'summary')];
 427         # Project specific override is not supported.
 428         'actions' => {
 429                 'override' => 0,
 430                 'default' => []},
 431
 432         # Allow gitweb scan project content tags of project repository,
 433         # and display the popular Web 2.0-ish "tag cloud" near the projects
 434         # list.  Note that this is something COMPLETELY different from the
 435         # normal Git tags.
 436
 437         # gitweb by itself can show existing tags, but it does not handle
 438         # tagging itself; you need to do it externally, outside gitweb.
 439         # The format is described in git_get_project_ctags() subroutine.
 440         # You may want to install the HTML::TagCloud Perl module to get
 441         # a pretty tag cloud instead of just a list of tags.
 442
 443         # To enable system wide have in $GITWEB_CONFIG
 444         # $feature{'ctags'}{'default'} = [1];
 445         # Project specific override is not supported.
 446
 447         # In the future whether ctags editing is enabled might depend
 448         # on the value, but using 1 should always mean no editing of ctags.
 449         'ctags' => {
 450                 'override' => 0,
 451                 'default' => [0]},
 452
 453         # The maximum number of patches in a patchset generated in patch
 454         # view. Set this to 0 or undef to disable patch view, or to a
 455         # negative number to remove any limit.
 456
 457         # To disable system wide have in $GITWEB_CONFIG
 458         # $feature{'patches'}{'default'} = [0];
 459         # To have project specific config enable override in $GITWEB_CONFIG
 460         # $feature{'patches'}{'override'} = 1;
 461         # and in project config gitweb.patches = 0|n;
 462         # where n is the maximum number of patches allowed in a patchset.
 463         'patches' => {
 464                 'sub' => \&feature_patches,
 465                 'override' => 0,
 466                 'default' => [16]},
 467
 468         # Avatar support. When this feature is enabled, views such as
 469         # shortlog or commit will display an avatar associated with
 470         # the email of the committer(s) and/or author(s).
 471
 472         # Currently available providers are gravatar and picon.
 473         # If an unknown provider is specified, the feature is disabled.
 474
 475         # Gravatar depends on Digest::MD5.
 476         # Picon currently relies on the indiana.edu database.
 477
 478         # To enable system wide have in $GITWEB_CONFIG
 479         # $feature{'avatar'}{'default'} = ['<provider>'];
 480         # where <provider> is either gravatar or picon.
 481         # To have project specific config enable override in $GITWEB_CONFIG
 482         # $feature{'avatar'}{'override'} = 1;
 483         # and in project config gitweb.avatar = <provider>;
 484         'avatar' => {
 485                 'sub' => \&feature_avatar,
 486                 'override' => 0,
 487                 'default' => ['']},
 488
 489         # Enable displaying how much time and how many git commands
 490         # it took to generate and display page.  Disabled by default.
 491         # Project specific override is not supported.
 492         'timed' => {
 493                 'override' => 0,
 494                 'default' => [0]},
 495
 496         # Enable turning some links into links to actions which require
 497         # JavaScript to run (like 'blame_incremental').  Not enabled by
 498         # default.  Project specific override is currently not supported.
 499         'javascript-actions' => {
 500                 'override' => 0,
 501                 'default' => [0]},
 502
 503         # Enable and configure ability to change common timezone for dates
 504         # in gitweb output via JavaScript.  Enabled by default.
 505         # Project specific override is not supported.
 506         'javascript-timezone' => {
 507                 'override' => 0,
 508                 'default' => [
 509                         'local',     # default timezone: 'utc', 'local', or '(-|+)HHMM' format,
 510                                      # or undef to turn off this feature
 511                         'gitweb_tz', # name of cookie where to store selected timezone
 512                         'datetime',  # CSS class used to mark up dates for manipulation
 513                 ]},
 514
 515         # Syntax highlighting support. This is based on Daniel Svensson's
 516         # and Sham Chukoury's work in gitweb-xmms2.git.
 517         # It requires the 'highlight' program present in $PATH,
 518         # and therefore is disabled by default.
 519
 520         # To enable system wide have in $GITWEB_CONFIG
 521         # $feature{'highlight'}{'default'} = [1];
 522
 523         'highlight' => {
 524                 'sub' => sub { feature_bool('highlight', @_) },
 525                 'override' => 0,
 526                 'default' => [0]},
 527
 528         # Enable displaying of remote heads in the heads list
 529
 530         # To enable system wide have in $GITWEB_CONFIG
 531         # $feature{'remote_heads'}{'default'} = [1];
 532         # To have project specific config enable override in $GITWEB_CONFIG
 533         # $feature{'remote_heads'}{'override'} = 1;
 534         # and in project config gitweb.remote_heads = 0|1;
 535         'remote_heads' => {
 536                 'sub' => sub { feature_bool('remote_heads', @_) },
 537                 'override' => 0,
 538                 'default' => [0]},
 539 );
 540
 541 sub gitweb_get_feature {
 542         my ($name) = @_;
 543         return unless exists $feature{$name};
 544         my ($sub, $override, @defaults) = (
 545                 $feature{$name}{'sub'},
 546                 $feature{$name}{'override'},
 547                 @{$feature{$name}{'default'}});
 548         # project specific override is possible only if we have project
 549         our $git_dir; # global variable, declared later
 550         if (!$override || !defined $git_dir) {
 551                 return @defaults;
 552         }
 553         if (!defined $sub) {
 554                 warn "feature $name is not overridable";
 555                 return @defaults;
 556         }
 557         return $sub->(@defaults);
 558 }
 559
 560 # A wrapper to check if a given feature is enabled.
 561 # With this, you can say
 562 #
 563 #   my $bool_feat = gitweb_check_feature('bool_feat');
 564 #   gitweb_check_feature('bool_feat') or somecode;
 565 #
 566 # instead of
 567 #
 568 #   my ($bool_feat) = gitweb_get_feature('bool_feat');
 569 #   (gitweb_get_feature('bool_feat'))[0] or somecode;
 570 #
 571 sub gitweb_check_feature {
 572         return (gitweb_get_feature(@_))[0];
 573 }
 574
 575
 576 sub feature_bool {
 577         my $key = shift;
 578         my ($val) = git_get_project_config($key, '--bool');
 579
 580         if (!defined $val) {
 581                 return ($_[0]);
 582         } elsif ($val eq 'true') {
 583                 return (1);
 584         } elsif ($val eq 'false') {
 585                 return (0);
 586         }
 587 }
 588
 589 sub feature_snapshot {
 590         my (@fmts) = @_;
 591
 592         my ($val) = git_get_project_config('snapshot');
 593
 594         if ($val) {
 595                 @fmts = ($val eq 'none' ? () : split /\s*[,\s]\s*/, $val);
 596         }
 597
 598         return @fmts;
 599 }
 600
 601 sub feature_patches {
 602         my @val = (git_get_project_config('patches', '--int'));
 603
 604         if (@val) {
 605                 return @val;
 606         }
 607
 608         return ($_[0]);
 609 }
 610
 611 sub feature_avatar {
 612         my @val = (git_get_project_config('avatar'));
 613
 614         return @val ? @val : @_;
 615 }
 616
 617 # checking HEAD file with -e is fragile if the repository was
 618 # initialized long time ago (i.e. symlink HEAD) and was pack-ref'ed
 619 # and then pruned.
 620 sub check_head_link {
 621         my ($dir) = @_;
 622         my $headfile = "$dir/HEAD";
 623         return ((-e $headfile) ||
 624                 (-l $headfile && readlink($headfile) =~ /^refs\/heads\//));
 625 }
 626
 627 sub check_export_ok {
 628         my ($dir) = @_;
 629         return (check_head_link($dir) &&
 630                 (!$export_ok || -e "$dir/$export_ok") &&
 631                 (!$export_auth_hook || $export_auth_hook->($dir)));
 632 }
 633
 634 # process alternate names for backward compatibility
 635 # filter out unsupported (unknown) snapshot formats
 636 sub filter_snapshot_fmts {
 637         my @fmts = @_;
 638
 639         @fmts = map {
 640                 exists $known_snapshot_format_aliases{$_} ?
 641                        $known_snapshot_format_aliases{$_} : $_} @fmts;
 642         @fmts = grep {
 643                 exists $known_snapshot_formats{$_} &&
 644                 !$known_snapshot_formats{$_}{'disabled'}} @fmts;
 645 }
 646
 647 # If it is set to code reference, it is code that it is to be run once per
 648 # request, allowing updating configurations that change with each request,
 649 # while running other code in config file only once.
 650 #
 651 # Otherwise, if it is false then gitweb would process config file only once;
 652 # if it is true then gitweb config would be run for each request.
 653 our $per_request_config = 1;
 654
 655 # read and parse gitweb config file given by its parameter.
 656 # returns true on success, false on recoverable error, allowing
 657 # to chain this subroutine, using first file that exists.
 658 # dies on errors during parsing config file, as it is unrecoverable.
 659 sub read_config_file {
 660         my $filename = shift;
 661         return unless defined $filename;
 662         # die if there are errors parsing config file
 663         if (-e $filename) {
 664                 do $filename;
 665                 die $@ if $@;
 666                 return 1;
 667         }
 668         return;
 669 }
 670
 671 our ($GITWEB_CONFIG, $GITWEB_CONFIG_SYSTEM, $GITWEB_CONFIG_COMMON);
 672 sub evaluate_gitweb_config {
 673         our $GITWEB_CONFIG = $ENV{'GITWEB_CONFIG'} || "++GITWEB_CONFIG++";
 674         our $GITWEB_CONFIG_SYSTEM = $ENV{'GITWEB_CONFIG_SYSTEM'} || "++GITWEB_CONFIG_SYSTEM++";
 675         our $GITWEB_CONFIG_COMMON = $ENV{'GITWEB_CONFIG_COMMON'} || "++GITWEB_CONFIG_COMMON++";
 676
 677         # Protect agains duplications of file names, to not read config twice.
 678         # Only one of $GITWEB_CONFIG and $GITWEB_CONFIG_SYSTEM is used, so
 679         # there possibility of duplication of filename there doesn't matter.
 680         $GITWEB_CONFIG = ""        if ($GITWEB_CONFIG eq $GITWEB_CONFIG_COMMON);
 681         $GITWEB_CONFIG_SYSTEM = "" if ($GITWEB_CONFIG_SYSTEM eq $GITWEB_CONFIG_COMMON);
 682
 683         # Common system-wide settings for convenience.
 684         # Those settings can be ovverriden by GITWEB_CONFIG or GITWEB_CONFIG_SYSTEM.
 685         read_config_file($GITWEB_CONFIG_COMMON);
 686
 687         # Use first config file that exists.  This means use the per-instance
 688         # GITWEB_CONFIG if exists, otherwise use GITWEB_SYSTEM_CONFIG.
 689         read_config_file($GITWEB_CONFIG) and return;
 690         read_config_file($GITWEB_CONFIG_SYSTEM);
 691 }
 692
 693 # Get loadavg of system, to compare against $maxload.
 694 # Currently it requires '/proc/loadavg' present to get loadavg;
 695 # if it is not present it returns 0, which means no load checking.
 696 sub get_loadavg {
 697         if( -e '/proc/loadavg' ){
 698                 open my $fd, '<', '/proc/loadavg'
 699                         or return 0;
 700                 my @load = split(/\s+/, scalar <$fd>);
 701                 close $fd;
 702
 703                 # The first three columns measure CPU and IO utilization of the last one,
 704                 # five, and 10 minute periods.  The fourth column shows the number of
 705                 # currently running processes and the total number of processes in the m/n
 706                 # format.  The last column displays the last process ID used.
 707                 return $load[0] || 0;
 708         }
 709         # additional checks for load average should go here for things that don't export
 710         # /proc/loadavg
 711
 712         return 0;
 713 }
 714
 715 # version of the core git binary
 716 our $git_version;
 717 sub evaluate_git_version {
 718         our $git_version = qx("$GIT" --version) =~ m/git version (.*)$/ ? $1 : "unknown";
 719         $number_of_git_cmds++;
 720 }
 721
 722 sub check_loadavg {
 723         if (defined $maxload && get_loadavg() > $maxload) {
 724                 die_error(503, "The load average on the server is too high");
 725         }
 726 }
 727
 728 # ======================================================================
 729 # input validation and dispatch
 730
 731 # input parameters can be collected from a variety of sources (presently, CGI
 732 # and PATH_INFO), so we define an %input_params hash that collects them all
 733 # together during validation: this allows subsequent uses (e.g. href()) to be
 734 # agnostic of the parameter origin
 735
 736 our %input_params = ();
 737
 738 # input parameters are stored with the long parameter name as key. This will
 739 # also be used in the href subroutine to convert parameters to their CGI
 740 # equivalent, and since the href() usage is the most frequent one, we store
 741 # the name -> CGI key mapping here, instead of the reverse.
 742 #
 743 # XXX: Warning: If you touch this, check the search form for updating,
 744 # too.
 745
 746 our @cgi_param_mapping = (
 747         project => "p",
 748         action => "a",
 749         file_name => "f",
 750         file_parent => "fp",
 751         hash => "h",
 752         hash_parent => "hp",
 753         hash_base => "hb",
 754         hash_parent_base => "hpb",
 755         page => "pg",
 756         order => "o",
 757         searchtext => "s",
 758         searchtype => "st",
 759         snapshot_format => "sf",
 760         extra_options => "opt",
 761         search_use_regexp => "sr",
 762         ctag => "by_tag",
 763         diff_style => "ds",
 764         project_filter => "pf",
 765         # this must be last entry (for manipulation from JavaScript)
 766         javascript => "js"
 767 );
 768 our %cgi_param_mapping = @cgi_param_mapping;
 769
 770 # we will also need to know the possible actions, for validation
 771 our %actions = (
 772         "blame" => \&git_blame,
 773         "blame_incremental" => \&git_blame_incremental,
 774         "blame_data" => \&git_blame_data,
 775         "blobdiff" => \&git_blobdiff,
 776         "blobdiff_plain" => \&git_blobdiff_plain,
 777         "blob" => \&git_blob,
 778         "blob_plain" => \&git_blob_plain,
 779         "commitdiff" => \&git_commitdiff,
 780         "commitdiff_plain" => \&git_commitdiff_plain,
 781         "commit" => \&git_commit,
 782         "forks" => \&git_forks,
 783         "heads" => \&git_heads,
 784         "history" => \&git_history,
 785         "log" => \&git_log,
 786         "patch" => \&git_patch,
 787         "patches" => \&git_patches,
 788         "remotes" => \&git_remotes,
 789         "rss" => \&git_rss,
 790         "atom" => \&git_atom,
 791         "search" => \&git_search,
 792         "search_help" => \&git_search_help,
 793         "shortlog" => \&git_shortlog,
 794         "summary" => \&git_summary,
 795         "tag" => \&git_tag,
 796         "tags" => \&git_tags,
 797         "tree" => \&git_tree,
 798         "snapshot" => \&git_snapshot,
 799         "object" => \&git_object,
 800         # those below don't need $project
 801         "opml" => \&git_opml,
 802         "project_list" => \&git_project_list,
 803         "project_index" => \&git_project_index,
 804 );
 805
 806 # finally, we have the hash of allowed extra_options for the commands that
 807 # allow them
 808 our %allowed_options = (
 809         "--no-merges" => [ qw(rss atom log shortlog history) ],
 810 );
 811
 812 # fill %input_params with the CGI parameters. All values except for 'opt'
 813 # should be single values, but opt can be an array. We should probably
 814 # build an array of parameters that can be multi-valued, but since for the time
 815 # being it's only this one, we just single it out
 816 sub evaluate_query_params {
 817         our $cgi;
 818
 819         while (my ($name, $symbol) = each %cgi_param_mapping) {
 820                 if ($symbol eq 'opt') {
 821                         $input_params{$name} = [ map { decode_utf8($_) } $cgi->param($symbol) ];
 822                 } else {
 823                         $input_params{$name} = decode_utf8($cgi->param($symbol));
 824                 }
 825         }
 826 }
 827
 828 # now read PATH_INFO and update the parameter list for missing parameters
 829 sub evaluate_path_info {
 830         return if defined $input_params{'project'};
 831         return if !$path_info;
 832         $path_info =~ s,^/+,,;
 833         return if !$path_info;
 834
 835         # find which part of PATH_INFO is project
 836         my $project = $path_info;
 837         $project =~ s,/+$,,;
 838         while ($project && !check_head_link("$projectroot/$project")) {
 839                 $project =~ s,/*[^/]*$,,;
 840         }
 841         return unless $project;
 842         $input_params{'project'} = $project;
 843
 844         # do not change any parameters if an action is given using the query string
 845         return if $input_params{'action'};
 846         $path_info =~ s,^\Q$project\E/*,,;
 847
 848         # next, check if we have an action
 849         my $action = $path_info;
 850         $action =~ s,/.*$,,;
 851         if (exists $actions{$action}) {
 852                 $path_info =~ s,^$action/*,,;
 853                 $input_params{'action'} = $action;
 854         }
 855
 856         # list of actions that want hash_base instead of hash, but can have no
 857         # pathname (f) parameter
 858         my @wants_base = (
 859                 'tree',
 860                 'history',
 861         );
 862
 863         # we want to catch, among others
 864         # [$hash_parent_base[:$file_parent]..]$hash_parent[:$file_name]
 865         my ($parentrefname, $parentpathname, $refname, $pathname) =
 866                 ($path_info =~ /^(?:(.+?)(?::(.+))?\.\.)?([^:]+?)?(?::(.+))?$/);
 867
 868         # first, analyze the 'current' part
 869         if (defined $pathname) {
 870                 # we got "branch:filename" or "branch:dir/"
 871                 # we could use git_get_type(branch:pathname), but:
 872                 # - it needs $git_dir
 873                 # - it does a git() call
 874                 # - the convention of terminating directories with a slash
 875                 #   makes it superfluous
 876                 # - embedding the action in the PATH_INFO would make it even
 877                 #   more superfluous
 878                 $pathname =~ s,^/+,,;
 879                 if (!$pathname || substr($pathname, -1) eq "/") {
 880                         $input_params{'action'} ||= "tree";
 881                         $pathname =~ s,/$,,;
 882                 } else {
 883                         # the default action depends on whether we had parent info
 884                         # or not
 885                         if ($parentrefname) {
 886                                 $input_params{'action'} ||= "blobdiff_plain";
 887                         } else {
 888                                 $input_params{'action'} ||= "blob_plain";
 889                         }
 890                 }
 891                 $input_params{'hash_base'} ||= $refname;
 892                 $input_params{'file_name'} ||= $pathname;
 893         } elsif (defined $refname) {
 894                 # we got "branch". In this case we have to choose if we have to
 895                 # set hash or hash_base.
 896                 #
 897                 # Most of the actions without a pathname only want hash to be
 898                 # set, except for the ones specified in @wants_base that want
 899                 # hash_base instead. It should also be noted that hand-crafted
 900                 # links having 'history' as an action and no pathname or hash
 901                 # set will fail, but that happens regardless of PATH_INFO.
 902                 if (defined $parentrefname) {
 903                         # if there is parent let the default be 'shortlog' action
 904                         # (for http://git.example.com/repo.git/A..B links); if there
 905                         # is no parent, dispatch will detect type of object and set
 906                         # action appropriately if required (if action is not set)
 907                         $input_params{'action'} ||= "shortlog";
 908                 }
 909                 if ($input_params{'action'} &&
 910                     grep { $_ eq $input_params{'action'} } @wants_base) {
 911                         $input_params{'hash_base'} ||= $refname;
 912                 } else {
 913                         $input_params{'hash'} ||= $refname;
 914                 }
 915         }
 916
 917         # next, handle the 'parent' part, if present
 918         if (defined $parentrefname) {
 919                 # a missing pathspec defaults to the 'current' filename, allowing e.g.
 920                 # someproject/blobdiff/oldrev..newrev:/filename
 921                 if ($parentpathname) {
 922                         $parentpathname =~ s,^/+,,;
 923                         $parentpathname =~ s,/$,,;
 924                         $input_params{'file_parent'} ||= $parentpathname;
 925                 } else {
 926                         $input_params{'file_parent'} ||= $input_params{'file_name'};
 927                 }
 928                 # we assume that hash_parent_base is wanted if a path was specified,
 929                 # or if the action wants hash_base instead of hash
 930                 if (defined $input_params{'file_parent'} ||
 931                         grep { $_ eq $input_params{'action'} } @wants_base) {
 932                         $input_params{'hash_parent_base'} ||= $parentrefname;
 933                 } else {
 934                         $input_params{'hash_parent'} ||= $parentrefname;
 935                 }
 936         }
 937
 938         # for the snapshot action, we allow URLs in the form
 939         # $project/snapshot/$hash.ext
 940         # where .ext determines the snapshot and gets removed from the
 941         # passed $refname to provide the $hash.
 942         #
 943         # To be able to tell that $refname includes the format extension, we
 944         # require the following two conditions to be satisfied:
 945         # - the hash input parameter MUST have been set from the $refname part
 946         #   of the URL (i.e. they must be equal)
 947         # - the snapshot format MUST NOT have been defined already (e.g. from
 948         #   CGI parameter sf)
 949         # It's also useless to try any matching unless $refname has a dot,
 950         # so we check for that too
 951         if (defined $input_params{'action'} &&
 952                 $input_params{'action'} eq 'snapshot' &&
 953                 defined $refname && index($refname, '.') != -1 &&
 954                 $refname eq $input_params{'hash'} &&
 955                 !defined $input_params{'snapshot_format'}) {
 956                 # We loop over the known snapshot formats, checking for
 957                 # extensions. Allowed extensions are both the defined suffix
 958                 # (which includes the initial dot already) and the snapshot
 959                 # format key itself, with a prepended dot
 960                 while (my ($fmt, $opt) = each %known_snapshot_formats) {
 961                         my $hash = $refname;
 962                         unless ($hash =~ s/(\Q$opt->{'suffix'}\E|\Q.$fmt\E)$//) {
 963                                 next;
 964                         }
 965                         my $sfx = $1;
 966                         # a valid suffix was found, so set the snapshot format
 967                         # and reset the hash parameter
 968                         $input_params{'snapshot_format'} = $fmt;
 969                         $input_params{'hash'} = $hash;
 970                         # we also set the format suffix to the one requested
 971                         # in the URL: this way a request for e.g. .tgz returns
 972                         # a .tgz instead of a .tar.gz
 973                         $known_snapshot_formats{$fmt}{'suffix'} = $sfx;
 974                         last;
 975                 }
 976         }
 977 }
 978
 979 our ($action, $project, $file_name, $file_parent, $hash, $hash_parent, $hash_base,
 980      $hash_parent_base, @extra_options, $page, $searchtype, $search_use_regexp,
 981      $searchtext, $search_regexp, $project_filter);
 982 sub evaluate_and_validate_params {
 983         our $action = $input_params{'action'};
 984         if (defined $action) {
 985                 if (!validate_action($action)) {
 986                         die_error(400, "Invalid action parameter");
 987                 }
 988         }
 989
 990         # parameters which are pathnames
 991         our $project = $input_params{'project'};
 992         if (defined $project) {
 993                 if (!validate_project($project)) {
 994                         undef $project;
 995                         die_error(404, "No such project");
 996                 }
 997         }
 998
 999         our $project_filter = $input_params{'project_filter'};
1000         if (defined $project_filter) {
1001                 if (!validate_pathname($project_filter)) {
1002                         die_error(404, "Invalid project_filter parameter");
1003                 }
1004         }
1005
1006         our $file_name = $input_params{'file_name'};
1007         if (defined $file_name) {
1008                 if (!validate_pathname($file_name)) {
1009                         die_error(400, "Invalid file parameter");
1010                 }
1011         }
1012
1013         our $file_parent = $input_params{'file_parent'};
1014         if (defined $file_parent) {
1015                 if (!validate_pathname($file_parent)) {
1016                         die_error(400, "Invalid file parent parameter");
1017                 }
1018         }
1019
1020         # parameters which are refnames
1021         our $hash = $input_params{'hash'};
1022         if (defined $hash) {
1023                 if (!validate_refname($hash)) {
1024                         die_error(400, "Invalid hash parameter");
1025                 }
1026         }
1027
1028         our $hash_parent = $input_params{'hash_parent'};
1029         if (defined $hash_parent) {
1030                 if (!validate_refname($hash_parent)) {
1031                         die_error(400, "Invalid hash parent parameter");
1032                 }
1033         }
1034
1035         our $hash_base = $input_params{'hash_base'};
1036         if (defined $hash_base) {
1037                 if (!validate_refname($hash_base)) {
1038                         die_error(400, "Invalid hash base parameter");
1039                 }
1040         }
1041
1042         our @extra_options = @{$input_params{'extra_options'}};
1043         # @extra_options is always defined, since it can only be (currently) set from
1044         # CGI, and $cgi->param() returns the empty array in array context if the param
1045         # is not set
1046         foreach my $opt (@extra_options) {
1047                 if (not exists $allowed_options{$opt}) {
1048                         die_error(400, "Invalid option parameter");
1049                 }
1050                 if (not grep(/^$action$/, @{$allowed_options{$opt}})) {
1051                         die_error(400, "Invalid option parameter for this action");
1052                 }
1053         }
1054
1055         our $hash_parent_base = $input_params{'hash_parent_base'};
1056         if (defined $hash_parent_base) {
1057                 if (!validate_refname($hash_parent_base)) {
1058                         die_error(400, "Invalid hash parent base parameter");
1059                 }
1060         }
1061
1062         # other parameters
1063         our $page = $input_params{'page'};
1064         if (defined $page) {
1065                 if ($page =~ m/[^0-9]/) {
1066                         die_error(400, "Invalid page parameter");
1067                 }
1068         }
1069
1070         our $searchtype = $input_params{'searchtype'};
1071         if (defined $searchtype) {
1072                 if ($searchtype =~ m/[^a-z]/) {
1073                         die_error(400, "Invalid searchtype parameter");
1074                 }
1075         }
1076
1077         our $search_use_regexp = $input_params{'search_use_regexp'};
1078
1079         our $searchtext = $input_params{'searchtext'};
1080         our $search_regexp;
1081         if (defined $searchtext) {
1082                 if (length($searchtext) < 2) {
1083                         die_error(403, "At least two characters are required for search parameter");
1084                 }
1085                 if ($search_use_regexp) {
1086                         $search_regexp = $searchtext;
1087                         if (!eval { qr/$search_regexp/; 1; }) {
1088                                 (my $error = $@) =~ s/ at \S+ line \d+.*\n?//;
1089                                 die_error(400, "Invalid search regexp '$search_regexp'",
1090                                           esc_html($error));
1091                         }
1092                 } else {
1093                         $search_regexp = quotemeta $searchtext;
1094                 }
1095         }
1096 }
1097
1098 # path to the current git repository
1099 our $git_dir;
1100 sub evaluate_git_dir {
1101         our $git_dir = "$projectroot/$project" if $project;
1102 }
1103
1104 our (@snapshot_fmts, $git_avatar);
1105 sub configure_gitweb_features {
1106         # list of supported snapshot formats
1107         our @snapshot_fmts = gitweb_get_feature('snapshot');
1108         @snapshot_fmts = filter_snapshot_fmts(@snapshot_fmts);
1109
1110         # check that the avatar feature is set to a known provider name,
1111         # and for each provider check if the dependencies are satisfied.
1112         # if the provider name is invalid or the dependencies are not met,
1113         # reset $git_avatar to the empty string.
1114         our ($git_avatar) = gitweb_get_feature('avatar');
1115         if ($git_avatar eq 'gravatar') {
1116                 $git_avatar = '' unless (eval { require Digest::MD5; 1; });
1117         } elsif ($git_avatar eq 'picon') {
1118                 # no dependencies
1119         } else {
1120                 $git_avatar = '';
1121         }
1122 }
1123
1124 # custom error handler: 'die <message>' is Internal Server Error
1125 sub handle_errors_html {
1126         my $msg = shift; # it is already HTML escaped
1127
1128         # to avoid infinite loop where error occurs in die_error,
1129         # change handler to default handler, disabling handle_errors_html
1130         set_message("Error occured when inside die_error:\n$msg");
1131
1132         # you cannot jump out of die_error when called as error handler;
1133         # the subroutine set via CGI::Carp::set_message is called _after_
1134         # HTTP headers are already written, so it cannot write them itself
1135         die_error(undef, undef, $msg, -error_handler => 1, -no_http_header => 1);
1136 }
1137 set_message(\&handle_errors_html);
1138
1139 # dispatch
1140 sub dispatch {
1141         if (!defined $action) {
1142                 if (defined $hash) {
1143                         $action = git_get_type($hash);
1144                         $action or die_error(404, "Object does not exist");
1145                 } elsif (defined $hash_base && defined $file_name) {
1146                         $action = git_get_type("$hash_base:$file_name");
1147                         $action or die_error(404, "File or directory does not exist");
1148                 } elsif (defined $project) {
1149                         $action = 'summary';
1150                 } else {
1151                         $action = 'project_list';
1152                 }
1153         }
1154         if (!defined($actions{$action})) {
1155                 die_error(400, "Unknown action");
1156         }
1157         if ($action !~ m/^(?:opml|project_list|project_index)$/ &&
1158             !$project) {
1159                 die_error(400, "Project needed");
1160         }
1161         $actions{$action}->();
1162 }
1163
1164 sub reset_timer {
1165         our $t0 = [ gettimeofday() ]
1166                 if defined $t0;
1167         our $number_of_git_cmds = 0;
1168 }
1169
1170 our $first_request = 1;
1171 sub run_request {
1172         reset_timer();
1173
1174         evaluate_uri();
1175         if ($first_request) {
1176                 evaluate_gitweb_config();
1177                 evaluate_git_version();
1178         }
1179         if ($per_request_config) {
1180                 if (ref($per_request_config) eq 'CODE') {
1181                         $per_request_config->();
1182                 } elsif (!$first_request) {
1183                         evaluate_gitweb_config();
1184                 }
1185         }
1186         check_loadavg();
1187
1188         # $projectroot and $projects_list might be set in gitweb config file
1189         $projects_list ||= $projectroot;
1190
1191         evaluate_query_params();
1192         evaluate_path_info();
1193         evaluate_and_validate_params();
1194         evaluate_git_dir();
1195
1196         configure_gitweb_features();
1197
1198         dispatch();
1199 }
1200
1201 our $is_last_request = sub { 1 };
1202 our ($pre_dispatch_hook, $post_dispatch_hook, $pre_listen_hook);
1203 our $CGI = 'CGI';
1204 our $cgi;
1205 sub configure_as_fcgi {
1206         require CGI::Fast;
1207         our $CGI = 'CGI::Fast';
1208
1209         my $request_number = 0;
1210         # let each child service 100 requests
1211         our $is_last_request = sub { ++$request_number > 100 };
1212 }
1213 sub evaluate_argv {
1214         my $script_name = $ENV{'SCRIPT_NAME'} || $ENV{'SCRIPT_FILENAME'} || __FILE__;
1215         configure_as_fcgi()
1216                 if $script_name =~ /\.fcgi$/;
1217
1218         return unless (@ARGV);
1219
1220         require Getopt::Long;
1221         Getopt::Long::GetOptions(
1222                 'fastcgi|fcgi|f' => \&configure_as_fcgi,
1223                 'nproc|n=i' => sub {
1224                         my ($arg, $val) = @_;
1225                         return unless eval { require FCGI::ProcManager; 1; };
1226                         my $proc_manager = FCGI::ProcManager->new({
1227                                 n_processes => $val,
1228                         });
1229                         our $pre_listen_hook    = sub { $proc_manager->pm_manage()        };
1230                         our $pre_dispatch_hook  = sub { $proc_manager->pm_pre_dispatch()  };
1231                         our $post_dispatch_hook = sub { $proc_manager->pm_post_dispatch() };
1232                 },
1233         );
1234 }
1235
1236 sub run {
1237         evaluate_argv();
1238
1239         $first_request = 1;
1240         $pre_listen_hook->()
1241                 if $pre_listen_hook;
1242
1243  REQUEST:
1244         while ($cgi = $CGI->new()) {
1245                 $pre_dispatch_hook->()
1246                         if $pre_dispatch_hook;
1247
1248                 run_request();
1249
1250                 $post_dispatch_hook->()
1251                         if $post_dispatch_hook;
1252                 $first_request = 0;
1253
1254                 last REQUEST if ($is_last_request->());
1255         }
1256
1257  DONE_GITWEB:
1258         1;
1259 }
1260
1261 run();
1262
1263 if (defined caller) {
1264         # wrapped in a subroutine processing requests,
1265         # e.g. mod_perl with ModPerl::Registry, or PSGI with Plack::App::WrapCGI
1266         return;
1267 } else {
1268         # pure CGI script, serving single request
1269         exit;
1270 }
1271
1272 ## ======================================================================
1273 ## action links
1274
1275 # possible values of extra options
1276 # -full => 0|1      - use absolute/full URL ($my_uri/$my_url as base)
1277 # -replay => 1      - start from a current view (replay with modifications)
1278 # -path_info => 0|1 - don't use/use path_info URL (if possible)
1279 # -anchor => ANCHOR - add #ANCHOR to end of URL, implies -replay if used alone
1280 sub href {
1281         my %params = @_;
1282         # default is to use -absolute url() i.e. $my_uri
1283         my $href = $params{-full} ? $my_url : $my_uri;
1284
1285         # implicit -replay, must be first of implicit params
1286         $params{-replay} = 1 if (keys %params == 1 && $params{-anchor});
1287
1288         $params{'project'} = $project unless exists $params{'project'};
1289
1290         if ($params{-replay}) {
1291                 while (my ($name, $symbol) = each %cgi_param_mapping) {
1292                         if (!exists $params{$name}) {
1293                                 $params{$name} = $input_params{$name};
1294                         }
1295                 }
1296         }
1297
1298         my $use_pathinfo = gitweb_check_feature('pathinfo');
1299         if (defined $params{'project'} &&
1300             (exists $params{-path_info} ? $params{-path_info} : $use_pathinfo)) {
1301                 # try to put as many parameters as possible in PATH_INFO:
1302                 #   - project name
1303                 #   - action
1304                 #   - hash_parent or hash_parent_base:/file_parent
1305                 #   - hash or hash_base:/filename
1306                 #   - the snapshot_format as an appropriate suffix
1307
1308                 # When the script is the root DirectoryIndex for the domain,
1309                 # $href here would be something like http://gitweb.example.com/
1310                 # Thus, we strip any trailing / from $href, to spare us double
1311                 # slashes in the final URL
1312                 $href =~ s,/$,,;
1313
1314                 # Then add the project name, if present
1315                 $href .= "/".esc_path_info($params{'project'});
1316                 delete $params{'project'};
1317
1318                 # since we destructively absorb parameters, we keep this
1319                 # boolean that remembers if we're handling a snapshot
1320                 my $is_snapshot = $params{'action'} eq 'snapshot';
1321
1322                 # Summary just uses the project path URL, any other action is
1323                 # added to the URL
1324                 if (defined $params{'action'}) {
1325                         $href .= "/".esc_path_info($params{'action'})
1326                                 unless $params{'action'} eq 'summary';
1327                         delete $params{'action'};
1328                 }
1329
1330                 # Next, we put hash_parent_base:/file_parent..hash_base:/file_name,
1331                 # stripping nonexistent or useless pieces
1332                 $href .= "/" if ($params{'hash_base'} || $params{'hash_parent_base'}
1333                         || $params{'hash_parent'} || $params{'hash'});
1334                 if (defined $params{'hash_base'}) {
1335                         if (defined $params{'hash_parent_base'}) {
1336                                 $href .= esc_path_info($params{'hash_parent_base'});
1337                                 # skip the file_parent if it's the same as the file_name
1338                                 if (defined $params{'file_parent'}) {
1339                                         if (defined $params{'file_name'} && $params{'file_parent'} eq $params{'file_name'}) {
1340                                                 delete $params{'file_parent'};
1341                                         } elsif ($params{'file_parent'} !~ /\.\./) {
1342                                                 $href .= ":/".esc_path_info($params{'file_parent'});
1343                                                 delete $params{'file_parent'};
1344                                         }
1345                                 }
1346                                 $href .= "..";
1347                                 delete $params{'hash_parent'};
1348                                 delete $params{'hash_parent_base'};
1349                         } elsif (defined $params{'hash_parent'}) {
1350                                 $href .= esc_path_info($params{'hash_parent'}). "..";
1351                                 delete $params{'hash_parent'};
1352                         }
1353
1354                         $href .= esc_path_info($params{'hash_base'});
1355                         if (defined $params{'file_name'} && $params{'file_name'} !~ /\.\./) {
1356                                 $href .= ":/".esc_path_info($params{'file_name'});
1357                                 delete $params{'file_name'};
1358                         }
1359                         delete $params{'hash'};
1360                         delete $params{'hash_base'};
1361                 } elsif (defined $params{'hash'}) {
1362                         $href .= esc_path_info($params{'hash'});
1363                         delete $params{'hash'};
1364                 }
1365
1366                 # If the action was a snapshot, we can absorb the
1367                 # snapshot_format parameter too
1368                 if ($is_snapshot) {
1369                         my $fmt = $params{'snapshot_format'};
1370                         # snapshot_format should always be defined when href()
1371                         # is called, but just in case some code forgets, we
1372                         # fall back to the default
1373                         $fmt ||= $snapshot_fmts[0];
1374                         $href .= $known_snapshot_formats{$fmt}{'suffix'};
1375                         delete $params{'snapshot_format'};
1376                 }
1377         }
1378
1379         # now encode the parameters explicitly
1380         my @result = ();
1381         for (my $i = 0; $i < @cgi_param_mapping; $i += 2) {
1382                 my ($name, $symbol) = ($cgi_param_mapping[$i], $cgi_param_mapping[$i+1]);
1383                 if (defined $params{$name}) {
1384                         if (ref($params{$name}) eq "ARRAY") {
1385                                 foreach my $par (@{$params{$name}}) {
1386                                         push @result, $symbol . "=" . esc_param($par);
1387                                 }
1388                         } else {
1389                                 push @result, $symbol . "=" . esc_param($params{$name});
1390                         }
1391                 }
1392         }
1393         $href .= "?" . join(';', @result) if scalar @result;
1394
1395         # final transformation: trailing spaces must be escaped (URI-encoded)
1396         $href =~ s/(\s+)$/CGI::escape($1)/e;
1397
1398         if ($params{-anchor}) {
1399                 $href .= "#".esc_param($params{-anchor});
1400         }
1401
1402         return $href;
1403 }
1404
1405
1406 ## ======================================================================
1407 ## validation, quoting/unquoting and escaping
1408
1409 sub validate_action {
1410         my $input = shift || return undef;
1411         return undef unless exists $actions{$input};
1412         return $input;
1413 }
1414
1415 sub validate_project {
1416         my $input = shift || return undef;
1417         if (!validate_pathname($input) ||
1418                 !(-d "$projectroot/$input") ||
1419                 !check_export_ok("$projectroot/$input") ||
1420                 ($strict_export && !project_in_list($input))) {
1421                 return undef;
1422         } else {
1423                 return $input;
1424         }
1425 }
1426
1427 sub validate_pathname {
1428         my $input = shift || return undef;
1429
1430         # no '.' or '..' as elements of path, i.e. no '.' nor '..'
1431         # at the beginning, at the end, and between slashes.
1432         # also this catches doubled slashes
1433         if ($input =~ m!(^|/)(|\.|\.\.)(/|$)!) {
1434                 return undef;
1435         }
1436         # no null characters
1437         if ($input =~ m!\0!) {
1438                 return undef;
1439         }
1440         return $input;
1441 }
1442
1443 sub validate_refname {
1444         my $input = shift || return undef;
1445
1446         # textual hashes are O.K.
1447         if ($input =~ m/^[0-9a-fA-F]{40}$/) {
1448                 return $input;
1449         }
1450         # it must be correct pathname
1451         $input = validate_pathname($input)
1452                 or return undef;
1453         # restrictions on ref name according to git-check-ref-format
1454         if ($input =~ m!(/\.|\.\.|[\000-\040\177 ~^:?*\[]|/$)!) {
1455                 return undef;
1456         }
1457         return $input;
1458 }
1459
1460 # decode sequences of octets in utf8 into Perl's internal form,
1461 # which is utf-8 with utf8 flag set if needed.  gitweb writes out
1462 # in utf-8 thanks to "binmode STDOUT, ':utf8'" at beginning
1463 sub to_utf8 {
1464         my $str = shift;
1465         return undef unless defined $str;
1466
1467         if (utf8::is_utf8($str) || utf8::decode($str)) {
1468                 return $str;
1469         } else {
1470                 return decode($fallback_encoding, $str, Encode::FB_DEFAULT);
1471         }
1472 }
1473
1474 # quote unsafe chars, but keep the slash, even when it's not
1475 # correct, but quoted slashes look too horrible in bookmarks
1476 sub esc_param {
1477         my $str = shift;
1478         return undef unless defined $str;
1479         $str =~ s/([^A-Za-z0-9\-_.~()\/:@ ]+)/CGI::escape($1)/eg;
1480         $str =~ s/ /\+/g;
1481         return $str;
1482 }
1483
1484 # the quoting rules for path_info fragment are slightly different
1485 sub esc_path_info {
1486         my $str = shift;
1487         return undef unless defined $str;
1488
1489         # path_info doesn't treat '+' as space (specially), but '?' must be escaped
1490         $str =~ s/([^A-Za-z0-9\-_.~();\/;:@&= +]+)/CGI::escape($1)/eg;
1491
1492         return $str;
1493 }
1494
1495 # quote unsafe chars in whole URL, so some characters cannot be quoted
1496 sub esc_url {
1497         my $str = shift;
1498         return undef unless defined $str;
1499         $str =~ s/([^A-Za-z0-9\-_.~();\/;?:@&= ]+)/CGI::escape($1)/eg;
1500         $str =~ s/ /\+/g;
1501         return $str;
1502 }
1503
1504 # quote unsafe characters in HTML attributes
1505 sub esc_attr {
1506
1507         # for XHTML conformance escaping '"' to '&quot;' is not enough
1508         return esc_html(@_);
1509 }
1510
1511 # replace invalid utf8 character with SUBSTITUTION sequence
1512 sub esc_html {
1513         my $str = shift;
1514         my %opts = @_;
1515
1516         return undef unless defined $str;
1517
1518         $str = to_utf8($str);
1519         $str = $cgi->escapeHTML($str);
1520         if ($opts{'-nbsp'}) {
1521                 $str =~ s/ /&nbsp;/g;
1522         }
1523         $str =~ s|([[:cntrl:]])|(($1 ne "\t") ? quot_cec($1) : $1)|eg;
1524         return $str;
1525 }
1526
1527 # quote control characters and escape filename to HTML
1528 sub esc_path {
1529         my $str = shift;
1530         my %opts = @_;
1531
1532         return undef unless defined $str;
1533
1534         $str = to_utf8($str);
1535         $str = $cgi->escapeHTML($str);
1536         if ($opts{'-nbsp'}) {
1537                 $str =~ s/ /&nbsp;/g;
1538         }
1539         $str =~ s|([[:cntrl:]])|quot_cec($1)|eg;
1540         return $str;
1541 }
1542
1543 # Sanitize for use in XHTML + application/xml+xhtm (valid XML 1.0)
1544 sub sanitize {
1545         my $str = shift;
1546
1547         return undef unless defined $str;
1548
1549         $str = to_utf8($str);
1550         $str =~ s|([[:cntrl:]])|($1 =~ /[\t\n\r]/ ? $1 : quot_cec($1))|eg;
1551         return $str;
1552 }
1553
1554 # Make control characters "printable", using character escape codes (CEC)
1555 sub quot_cec {
1556         my $cntrl = shift;
1557         my %opts = @_;
1558         my %es = ( # character escape codes, aka escape sequences
1559                 "\t" => '\t',   # tab            (HT)
1560                 "\n" => '\n',   # line feed      (LF)
1561                 "\r" => '\r',   # carrige return (CR)
1562                 "\f" => '\f',   # form feed      (FF)
1563                 "\b" => '\b',   # backspace      (BS)
1564                 "\a" => '\a',   # alarm (bell)   (BEL)
1565                 "\e" => '\e',   # escape         (ESC)
1566                 "\013" => '\v', # vertical tab   (VT)
1567                 "\000" => '\0', # nul character  (NUL)
1568         );
1569         my $chr = ( (exists $es{$cntrl})
1570                     ? $es{$cntrl}
1571                     : sprintf('\%2x', ord($cntrl)) );
1572         if ($opts{-nohtml}) {
1573                 return $chr;
1574         } else {
1575                 return "<span class=\"cntrl\">$chr</span>";
1576         }
1577 }
1578
1579 # Alternatively use unicode control pictures codepoints,
1580 # Unicode "printable representation" (PR)
1581 sub quot_upr {
1582         my $cntrl = shift;
1583         my %opts = @_;
1584
1585         my $chr = sprintf('&#%04d;', 0x2400+ord($cntrl));
1586         if ($opts{-nohtml}) {
1587                 return $chr;
1588         } else {
1589                 return "<span class=\"cntrl\">$chr</span>";
1590         }
1591 }
1592
1593 # git may return quoted and escaped filenames
1594 sub unquote {
1595         my $str = shift;
1596
1597         sub unq {
1598                 my $seq = shift;
1599                 my %es = ( # character escape codes, aka escape sequences
1600                         't' => "\t",   # tab            (HT, TAB)
1601                         'n' => "\n",   # newline        (NL)
1602                         'r' => "\r",   # return         (CR)
1603                         'f' => "\f",   # form feed      (FF)
1604                         'b' => "\b",   # backspace      (BS)
1605                         'a' => "\a",   # alarm (bell)   (BEL)
1606                         'e' => "\e",   # escape         (ESC)
1607                         'v' => "\013", # vertical tab   (VT)
1608                 );
1609
1610                 if ($seq =~ m/^[0-7]{1,3}$/) {
1611                         # octal char sequence
1612                         return chr(oct($seq));
1613                 } elsif (exists $es{$seq}) {
1614                         # C escape sequence, aka character escape code
1615                         return $es{$seq};
1616                 }
1617                 # quoted ordinary character
1618                 return $seq;
1619         }
1620
1621         if ($str =~ m/^"(.*)"$/) {
1622                 # needs unquoting
1623                 $str = $1;
1624                 $str =~ s/\\([^0-7]|[0-7]{1,3})/unq($1)/eg;
1625         }
1626         return $str;
1627 }
1628
1629 # escape tabs (convert tabs to spaces)
1630 sub untabify {
1631         my $line = shift;
1632
1633         while ((my $pos = index($line, "\t")) != -1) {
1634                 if (my $count = (8 - ($pos % 8))) {
1635                         my $spaces = ' ' x $count;
1636                         $line =~ s/\t/$spaces/;
1637                 }
1638         }
1639
1640         return $line;
1641 }
1642
1643 sub project_in_list {
1644         my $project = shift;
1645         my @list = git_get_projects_list();
1646         return @list && scalar(grep { $_->{'path'} eq $project } @list);
1647 }
1648
1649 ## ----------------------------------------------------------------------
1650 ## HTML aware string manipulation
1651
1652 # Try to chop given string on a word boundary between position
1653 # $len and $len+$add_len. If there is no word boundary there,
1654 # chop at $len+$add_len. Do not chop if chopped part plus ellipsis
1655 # (marking chopped part) would be longer than given string.
1656 sub chop_str {
1657         my $str = shift;
1658         my $len = shift;
1659         my $add_len = shift || 10;
1660         my $where = shift || 'right'; # 'left' | 'center' | 'right'
1661
1662         # Make sure perl knows it is utf8 encoded so we don't
1663         # cut in the middle of a utf8 multibyte char.
1664         $str = to_utf8($str);
1665
1666         # allow only $len chars, but don't cut a word if it would fit in $add_len
1667         # if it doesn't fit, cut it if it's still longer than the dots we would add
1668         # remove chopped character entities entirely
1669
1670         # when chopping in the middle, distribute $len into left and right part
1671         # return early if chopping wouldn't make string shorter
1672         if ($where eq 'center') {
1673                 return $str if ($len + 5 >= length($str)); # filler is length 5
1674                 $len = int($len/2);
1675         } else {
1676                 return $str if ($len + 4 >= length($str)); # filler is length 4
1677         }
1678
1679         # regexps: ending and beginning with word part up to $add_len
1680         my $endre = qr/.{$len}\w{0,$add_len}/;
1681         my $begre = qr/\w{0,$add_len}.{$len}/;
1682
1683         if ($where eq 'left') {
1684                 $str =~ m/^(.*?)($begre)$/;
1685                 my ($lead, $body) = ($1, $2);
1686                 if (length($lead) > 4) {
1687                         $lead = " ...";
1688                 }
1689                 return "$lead$body";
1690
1691         } elsif ($where eq 'center') {
1692                 $str =~ m/^($endre)(.*)$/;
1693                 my ($left, $str)  = ($1, $2);
1694                 $str =~ m/^(.*?)($begre)$/;
1695                 my ($mid, $right) = ($1, $2);
1696                 if (length($mid) > 5) {
1697                         $mid = " ... ";
1698                 }
1699                 return "$left$mid$right";
1700
1701         } else {
1702                 $str =~ m/^($endre)(.*)$/;
1703                 my $body = $1;
1704                 my $tail = $2;
1705                 if (length($tail) > 4) {
1706                         $tail = "... ";
1707                 }
1708                 return "$body$tail";
1709         }
1710 }
1711
1712 # takes the same arguments as chop_str, but also wraps a <span> around the
1713 # result with a title attribute if it does get chopped. Additionally, the
1714 # string is HTML-escaped.
1715 sub chop_and_escape_str {
1716         my ($str) = @_;
1717
1718         my $chopped = chop_str(@_);
1719         $str = to_utf8($str);
1720         if ($chopped eq $str) {
1721                 return esc_html($chopped);
1722         } else {
1723                 $str =~ s/[[:cntrl:]]/?/g;
1724                 return $cgi->span({-title=>$str}, esc_html($chopped));
1725         }
1726 }
1727
1728 # Highlight selected fragments of string, using given CSS class,
1729 # and escape HTML.  It is assumed that fragments do not overlap.
1730 # Regions are passed as list of pairs (array references).
1731 #
1732 # Example: esc_html_hl_regions("foobar", "mark", [ 0, 3 ]) returns
1733 # '<span class="mark">foo</span>bar'
1734 sub esc_html_hl_regions {
1735         my ($str, $css_class, @sel) = @_;
1736         my %opts = grep { ref($_) ne 'ARRAY' } @sel;
1737         @sel     = grep { ref($_) eq 'ARRAY' } @sel;
1738         return esc_html($str, %opts) unless @sel;
1739
1740         my $out = '';
1741         my $pos = 0;
1742
1743         for my $s (@sel) {
1744                 my ($begin, $end) = @$s;
1745
1746                 # Don't create empty <span> elements.
1747                 next if $end <= $begin;
1748
1749                 my $escaped = esc_html(substr($str, $begin, $end - $begin),
1750                                        %opts);
1751
1752                 $out .= esc_html(substr($str, $pos, $begin - $pos), %opts)
1753                         if ($begin - $pos > 0);
1754                 $out .= $cgi->span({-class => $css_class}, $escaped);
1755
1756                 $pos = $end;
1757         }
1758         $out .= esc_html(substr($str, $pos), %opts)
1759                 if ($pos < length($str));
1760
1761         return $out;
1762 }
1763
1764 # return positions of beginning and end of each match
1765 sub matchpos_list {
1766         my ($str, $regexp) = @_;
1767         return unless (defined $str && defined $regexp);
1768
1769         my @matches;
1770         while ($str =~ /$regexp/g) {
1771                 push @matches, [$-[0], $+[0]];
1772         }
1773         return @matches;
1774 }
1775
1776 # highlight match (if any), and escape HTML
1777 sub esc_html_match_hl {
1778         my ($str, $regexp) = @_;
1779         return esc_html($str) unless defined $regexp;
1780
1781         my @matches = matchpos_list($str, $regexp);
1782         return esc_html($str) unless @matches;
1783
1784         return esc_html_hl_regions($str, 'match', @matches);
1785 }
1786
1787
1788 # highlight match (if any) of shortened string, and escape HTML
1789 sub esc_html_match_hl_chopped {
1790         my ($str, $chopped, $regexp) = @_;
1791         return esc_html_match_hl($str, $regexp) unless defined $chopped;
1792
1793         my @matches = matchpos_list($str, $regexp);
1794         return esc_html($chopped) unless @matches;
1795
1796         # filter matches so that we mark chopped string
1797         my $tail = "... "; # see chop_str
1798         unless ($chopped =~ s/\Q$tail\E$//) {
1799                 $tail = '';
1800         }
1801         my $chop_len = length($chopped);
1802         my $tail_len = length($tail);
1803         my @filtered;
1804
1805         for my $m (@matches) {
1806                 if ($m->[0] > $chop_len) {
1807                         push @filtered, [ $chop_len, $chop_len + $tail_len ] if ($tail_len > 0);
1808                         last;
1809                 } elsif ($m->[1] > $chop_len) {
1810                         push @filtered, [ $m->[0], $chop_len + $tail_len ];
1811                         last;
1812                 }
1813                 push @filtered, $m;
1814         }
1815
1816         return esc_html_hl_regions($chopped . $tail, 'match', @filtered);
1817 }
1818
1819 ## ----------------------------------------------------------------------
1820 ## functions returning short strings
1821
1822 # CSS class for given age value (in seconds)
1823 sub age_class {
1824         my $age = shift;
1825
1826         if (!defined $age) {
1827                 return "noage";
1828         } elsif ($age < 60*60*2) {
1829                 return "age0";
1830         } elsif ($age < 60*60*24*2) {
1831                 return "age1";
1832         } else {
1833                 return "age2";
1834         }
1835 }
1836
1837 # convert age in seconds to "nn units ago" string
1838 sub age_string {
1839         my $age = shift;
1840         my $age_str;
1841
1842         if ($age > 60*60*24*365*2) {
1843                 $age_str = (int $age/60/60/24/365);
1844                 $age_str .= " years ago";
1845         } elsif ($age > 60*60*24*(365/12)*2) {
1846                 $age_str = int $age/60/60/24/(365/12);
1847                 $age_str .= " months ago";
1848         } elsif ($age > 60*60*24*7*2) {
1849                 $age_str = int $age/60/60/24/7;
1850                 $age_str .= " weeks ago";
1851         } elsif ($age > 60*60*24*2) {
1852                 $age_str = int $age/60/60/24;
1853                 $age_str .= " days ago";
1854         } elsif ($age > 60*60*2) {
1855                 $age_str = int $age/60/60;
1856                 $age_str .= " hours ago";
1857         } elsif ($age > 60*2) {
1858                 $age_str = int $age/60;
1859                 $age_str .= " min ago";
1860         } elsif ($age > 2) {
1861                 $age_str = int $age;
1862                 $age_str .= " sec ago";
1863         } else {
1864                 $age_str .= " right now";
1865         }
1866         return $age_str;
1867 }
1868
1869 use constant {
1870         S_IFINVALID => 0030000,
1871         S_IFGITLINK => 0160000,
1872 };
1873
1874 # submodule/subproject, a commit object reference
1875 sub S_ISGITLINK {
1876         my $mode = shift;
1877
1878         return (($mode & S_IFMT) == S_IFGITLINK)
1879 }
1880
1881 # convert file mode in octal to symbolic file mode string
1882 sub mode_str {
1883         my $mode = oct shift;
1884
1885         if (S_ISGITLINK($mode)) {
1886                 return 'm---------';
1887         } elsif (S_ISDIR($mode & S_IFMT)) {
1888                 return 'drwxr-xr-x';
1889         } elsif (S_ISLNK($mode)) {
1890                 return 'lrwxrwxrwx';
1891         } elsif (S_ISREG($mode)) {
1892                 # git cares only about the executable bit
1893                 if ($mode & S_IXUSR) {
1894                         return '-rwxr-xr-x';
1895                 } else {
1896                         return '-rw-r--r--';
1897                 };
1898         } else {
1899                 return '----------';
1900         }
1901 }
1902
1903 # convert file mode in octal to file type string
1904 sub file_type {
1905         my $mode = shift;
1906
1907         if ($mode !~ m/^[0-7]+$/) {
1908                 return $mode;
1909         } else {
1910                 $mode = oct $mode;
1911         }
1912
1913         if (S_ISGITLINK($mode)) {
1914                 return "submodule";
1915         } elsif (S_ISDIR($mode & S_IFMT)) {
1916                 return "directory";
1917         } elsif (S_ISLNK($mode)) {
1918                 return "symlink";
1919         } elsif (S_ISREG($mode)) {
1920                 return "file";
1921         } else {
1922                 return "unknown";
1923         }
1924 }
1925
1926 # convert file mode in octal to file type description string
1927 sub file_type_long {
1928         my $mode = shift;
1929
1930         if ($mode !~ m/^[0-7]+$/) {
1931                 return $mode;
1932         } else {
1933                 $mode = oct $mode;
1934         }
1935
1936         if (S_ISGITLINK($mode)) {
1937                 return "submodule";
1938         } elsif (S_ISDIR($mode & S_IFMT)) {
1939                 return "directory";
1940         } elsif (S_ISLNK($mode)) {
1941                 return "symlink";
1942         } elsif (S_ISREG($mode)) {
1943                 if ($mode & S_IXUSR) {
1944                         return "executable";
1945                 } else {
1946                         return "file";
1947                 };
1948         } else {
1949                 return "unknown";
1950         }
1951 }
1952
1953
1954 ## ----------------------------------------------------------------------
1955 ## functions returning short HTML fragments, or transforming HTML fragments
1956 ## which don't belong to other sections
1957
1958 # format line of commit message.
1959 sub format_log_line_html {
1960         my $line = shift;
1961
1962         $line = esc_html($line, -nbsp=>1);
1963         $line =~ s{\b([0-9a-fA-F]{8,40})\b}{
1964                 $cgi->a({-href => href(action=>"object", hash=>$1),
1965                                         -class => "text"}, $1);
1966         }eg;
1967
1968         return $line;
1969 }
1970
1971 # format marker of refs pointing to given object
1972
1973 # the destination action is chosen based on object type and current context:
1974 # - for annotated tags, we choose the tag view unless it's the current view
1975 #   already, in which case we go to shortlog view
1976 # - for other refs, we keep the current view if we're in history, shortlog or
1977 #   log view, and select shortlog otherwise
1978 sub format_ref_marker {
1979         my ($refs, $id) = @_;
1980         my $markers = '';
1981
1982         if (defined $refs->{$id}) {
1983                 foreach my $ref (@{$refs->{$id}}) {
1984                         # this code exploits the fact that non-lightweight tags are the
1985                         # only indirect objects, and that they are the only objects for which
1986                         # we want to use tag instead of shortlog as action
1987                         my ($type, $name) = qw();
1988                         my $indirect = ($ref =~ s/\^\{\}$//);
1989                         # e.g. tags/v2.6.11 or heads/next
1990                         if ($ref =~ m!^(.*?)s?/(.*)$!) {
1991                                 $type = $1;
1992                                 $name = $2;
1993                         } else {
1994                                 $type = "ref";
1995                                 $name = $ref;
1996                         }
1997
1998                         my $class = $type;
1999                         $class .= " indirect" if $indirect;
2000
2001                         my $dest_action = "shortlog";
2002
2003                         if ($indirect) {
2004                                 $dest_action = "tag" unless $action eq "tag";
2005                         } elsif ($action =~ /^(history|(short)?log)$/) {
2006                                 $dest_action = $action;
2007                         }
2008
2009                         my $dest = "";
2010                         $dest .= "refs/" unless $ref =~ m!^refs/!;
2011                         $dest .= $ref;
2012
2013                         my $link = $cgi->a({
2014                                 -href => href(
2015                                         action=>$dest_action,
2016                                         hash=>$dest
2017                                 )}, $name);
2018
2019                         $markers .= " <span class=\"".esc_attr($class)."\" title=\"".esc_attr($ref)."\">" .
2020                                 $link . "</span>";
2021                 }
2022         }
2023
2024         if ($markers) {
2025                 return ' <span class="refs">'. $markers . '</span>';
2026         } else {
2027                 return "";
2028         }
2029 }
2030
2031 # format, perhaps shortened and with markers, title line
2032 sub format_subject_html {
2033         my ($long, $short, $href, $extra) = @_;
2034         $extra = '' unless defined($extra);
2035
2036         if (length($short) < length($long)) {
2037                 $long =~ s/[[:cntrl:]]/?/g;
2038                 return $cgi->a({-href => $href, -class => "list subject",
2039                                 -title => to_utf8($long)},
2040                        esc_html($short)) . $extra;
2041         } else {
2042                 return $cgi->a({-href => $href, -class => "list subject"},
2043                        esc_html($long)) . $extra;
2044         }
2045 }
2046
2047 # Rather than recomputing the url for an email multiple times, we cache it
2048 # after the first hit. This gives a visible benefit in views where the avatar
2049 # for the same email is used repeatedly (e.g. shortlog).
2050 # The cache is shared by all avatar engines (currently gravatar only), which
2051 # are free to use it as preferred. Since only one avatar engine is used for any
2052 # given page, there's no risk for cache conflicts.
2053 our %avatar_cache = ();
2054
2055 # Compute the picon url for a given email, by using the picon search service over at
2056 # http://www.cs.indiana.edu/picons/search.html
2057 sub picon_url {
2058         my $email = lc shift;
2059         if (!$avatar_cache{$email}) {
2060                 my ($user, $domain) = split('@', $email);
2061                 $avatar_cache{$email} =
2062                         "http://www.cs.indiana.edu/cgi-pub/kinzler/piconsearch.cgi/" .
2063                         "$domain/$user/" .
2064                         "users+domains+unknown/up/single";
2065         }
2066         return $avatar_cache{$email};
2067 }
2068
2069 # Compute the gravatar url for a given email, if it's not in the cache already.
2070 # Gravatar stores only the part of the URL before the size, since that's the
2071 # one computationally more expensive. This also allows reuse of the cache for
2072 # different sizes (for this particular engine).
2073 sub gravatar_url {
2074         my $email = lc shift;
2075         my $size = shift;
2076         $avatar_cache{$email} ||=
2077                 "http://www.gravatar.com/avatar/" .
2078                         Digest::MD5::md5_hex($email) . "?s=";
2079         return $avatar_cache{$email} . $size;
2080 }
2081
2082 # Insert an avatar for the given $email at the given $size if the feature
2083 # is enabled.
2084 sub git_get_avatar {
2085         my ($email, %opts) = @_;
2086         my $pre_white  = ($opts{-pad_before} ? "&nbsp;" : "");
2087         my $post_white = ($opts{-pad_after}  ? "&nbsp;" : "");
2088         $opts{-size} ||= 'default';
2089         my $size = $avatar_size{$opts{-size}} || $avatar_size{'default'};
2090         my $url = "";
2091         if ($git_avatar eq 'gravatar') {
2092                 $url = gravatar_url($email, $size);
2093         } elsif ($git_avatar eq 'picon') {
2094                 $url = picon_url($email);
2095         }
2096         # Other providers can be added by extending the if chain, defining $url
2097         # as needed. If no variant puts something in $url, we assume avatars
2098         # are completely disabled/unavailable.
2099         if ($url) {
2100                 return $pre_white .
2101                        "<img width=\"$size\" " .
2102                             "class=\"avatar\" " .
2103                             "src=\"".esc_url($url)."\" " .
2104                             "alt=\"\" " .
2105                        "/>" . $post_white;
2106         } else {
2107                 return "";
2108         }
2109 }
2110
2111 sub format_search_author {
2112         my ($author, $searchtype, $displaytext) = @_;
2113         my $have_search = gitweb_check_feature('search');
2114
2115         if ($have_search) {
2116                 my $performed = "";
2117                 if ($searchtype eq 'author') {
2118                         $performed = "authored";
2119                 } elsif ($searchtype eq 'committer') {
2120                         $performed = "committed";
2121                 }
2122
2123                 return $cgi->a({-href => href(action=>"search", hash=>$hash,
2124                                 searchtext=>$author,
2125                                 searchtype=>$searchtype), class=>"list",
2126                                 title=>"Search for commits $performed by $author"},
2127                                 $displaytext);
2128
2129         } else {
2130                 return $displaytext;
2131         }
2132 }
2133
2134 # format the author name of the given commit with the given tag
2135 # the author name is chopped and escaped according to the other
2136 # optional parameters (see chop_str).
2137 sub format_author_html {
2138         my $tag = shift;
2139         my $co = shift;
2140         my $author = chop_and_escape_str($co->{'author_name'}, @_);
2141         return "<$tag class=\"author\">" .
2142                format_search_author($co->{'author_name'}, "author",
2143                        git_get_avatar($co->{'author_email'}, -pad_after => 1) .
2144                        $author) .
2145                "</$tag>";
2146 }
2147
2148 # format git diff header line, i.e. "diff --(git|combined|cc) ..."
2149 sub format_git_diff_header_line {
2150         my $line = shift;
2151         my $diffinfo = shift;
2152         my ($from, $to) = @_;
2153
2154         if ($diffinfo->{'nparents'}) {
2155                 # combined diff
2156                 $line =~ s!^(diff (.*?) )"?.*$!$1!;
2157                 if ($to->{'href'}) {
2158                         $line .= $cgi->a({-href => $to->{'href'}, -class => "path"},
2159                                          esc_path($to->{'file'}));
2160                 } else { # file was deleted (no href)
2161                         $line .= esc_path($to->{'file'});
2162                 }
2163         } else {
2164                 # "ordinary" diff
2165                 $line =~ s!^(diff (.*?) )"?a/.*$!$1!;
2166                 if ($from->{'href'}) {
2167                         $line .= $cgi->a({-href => $from->{'href'}, -class => "path"},
2168                                          'a/' . esc_path($from->{'file'}));
2169                 } else { # file was added (no href)
2170                         $line .= 'a/' . esc_path($from->{'file'});
2171                 }
2172                 $line .= ' ';
2173                 if ($to->{'href'}) {
2174                         $line .= $cgi->a({-href => $to->{'href'}, -class => "path"},
2175                                          'b/' . esc_path($to->{'file'}));
2176                 } else { # file was deleted
2177                         $line .= 'b/' . esc_path($to->{'file'});
2178                 }
2179         }
2180
2181         return "<div class=\"diff header\">$line</div>\n";
2182 }
2183
2184 # format extended diff header line, before patch itself
2185 sub format_extended_diff_header_line {
2186         my $line = shift;
2187         my $diffinfo = shift;
2188         my ($from, $to) = @_;
2189
2190         # match <path>
2191         if ($line =~ s!^((copy|rename) from ).*$!$1! && $from->{'href'}) {
2192                 $line .= $cgi->a({-href=>$from->{'href'}, -class=>"path"},
2193                                        esc_path($from->{'file'}));
2194         }
2195         if ($line =~ s!^((copy|rename) to ).*$!$1! && $to->{'href'}) {
2196                 $line .= $cgi->a({-href=>$to->{'href'}, -class=>"path"},
2197                                  esc_path($to->{'file'}));
2198         }
2199         # match single <mode>
2200         if ($line =~ m/\s(\d{6})$/) {
2201                 $line .= '<span class="info"> (' .
2202                          file_type_long($1) .
2203                          ')</span>';
2204         }
2205         # match <hash>
2206         if ($line =~ m/^index [0-9a-fA-F]{40},[0-9a-fA-F]{40}/) {
2207                 # can match only for combined diff
2208                 $line = 'index ';
2209                 for (my $i = 0; $i < $diffinfo->{'nparents'}; $i++) {
2210                         if ($from->{'href'}[$i]) {
2211                                 $line .= $cgi->a({-href=>$from->{'href'}[$i],
2212                                                   -class=>"hash"},
2213                                                  substr($diffinfo->{'from_id'}[$i],0,7));
2214                         } else {
2215                                 $line .= '0' x 7;
2216                         }
2217                         # separator
2218                         $line .= ',' if ($i < $diffinfo->{'nparents'} - 1);
2219                 }
2220                 $line .= '..';
2221                 if ($to->{'href'}) {
2222                         $line .= $cgi->a({-href=>$to->{'href'}, -class=>"hash"},
2223                                          substr($diffinfo->{'to_id'},0,7));
2224                 } else {
2225                         $line .= '0' x 7;
2226                 }
2227
2228         } elsif ($line =~ m/^index [0-9a-fA-F]{40}..[0-9a-fA-F]{40}/) {
2229                 # can match only for ordinary diff
2230                 my ($from_link, $to_link);
2231                 if ($from->{'href'}) {
2232                         $from_link = $cgi->a({-href=>$from->{'href'}, -class=>"hash"},
2233                                              substr($diffinfo->{'from_id'},0,7));
2234                 } else {
2235                         $from_link = '0' x 7;
2236                 }
2237                 if ($to->{'href'}) {
2238                         $to_link = $cgi->a({-href=>$to->{'href'}, -class=>"hash"},
2239                                            substr($diffinfo->{'to_id'},0,7));
2240                 } else {
2241                         $to_link = '0' x 7;
2242                 }
2243                 my ($from_id, $to_id) = ($diffinfo->{'from_id'}, $diffinfo->{'to_id'});
2244                 $line =~ s!$from_id\.\.$to_id!$from_link..$to_link!;
2245         }
2246
2247         return $line . "<br/>\n";
2248 }
2249
2250 # format from-file/to-file diff header
2251 sub format_diff_from_to_header {
2252         my ($from_line, $to_line, $diffinfo, $from, $to, @parents) = @_;
2253         my $line;
2254         my $result = '';
2255
2256         $line = $from_line;
2257         #assert($line =~ m/^---/) if DEBUG;
2258         # no extra formatting for "^--- /dev/null"
2259         if (! $diffinfo->{'nparents'}) {
2260                 # ordinary (single parent) diff
2261                 if ($line =~ m!^--- "?a/!) {
2262                         if ($from->{'href'}) {
2263                                 $line = '--- a/' .
2264                                         $cgi->a({-href=>$from->{'href'}, -class=>"path"},
2265                                                 esc_path($from->{'file'}));
2266                         } else {
2267                                 $line = '--- a/' .
2268                                         esc_path($from->{'file'});
2269                         }
2270                 }
2271                 $result .= qq!<div class="diff from_file">$line</div>\n!;
2272
2273         } else {
2274                 # combined diff (merge commit)
2275                 for (my $i = 0; $i < $diffinfo->{'nparents'}; $i++) {
2276                         if ($from->{'href'}[$i]) {
2277                                 $line = '--- ' .
2278                                         $cgi->a({-href=>href(action=>"blobdiff",
2279                                                              hash_parent=>$diffinfo->{'from_id'}[$i],
2280                                                              hash_parent_base=>$parents[$i],
2281                                                              file_parent=>$from->{'file'}[$i],
2282                                                              hash=>$diffinfo->{'to_id'},
2283                                                              hash_base=>$hash,
2284                                                              file_name=>$to->{'file'}),
2285                                                  -class=>"path",
2286                                                  -title=>"diff" . ($i+1)},
2287                                                 $i+1) .
2288                                         '/' .
2289                                         $cgi->a({-href=>$from->{'href'}[$i], -class=>"path"},
2290                                                 esc_path($from->{'file'}[$i]));
2291                         } else {
2292                                 $line = '--- /dev/null';
2293                         }
2294                         $result .= qq!<div class="diff from_file">$line</div>\n!;
2295                 }
2296         }
2297
2298         $line = $to_line;
2299         #assert($line =~ m/^\+\+\+/) if DEBUG;
2300         # no extra formatting for "^+++ /dev/null"
2301         if ($line =~ m!^\+\+\+ "?b/!) {
2302                 if ($to->{'href'}) {
2303                         $line = '+++ b/' .
2304                                 $cgi->a({-href=>$to->{'href'}, -class=>"path"},
2305                                         esc_path($to->{'file'}));
2306                 } else {
2307                         $line = '+++ b/' .
2308                                 esc_path($to->{'file'});
2309                 }
2310         }
2311         $result .= qq!<div class="diff to_file">$line</div>\n!;
2312
2313         return $result;
2314 }
2315
2316 # create note for patch simplified by combined diff
2317 sub format_diff_cc_simplified {
2318         my ($diffinfo, @parents) = @_;
2319         my $result = '';
2320
2321         $result .= "<div class=\"diff header\">" .
2322                    "diff --cc ";
2323         if (!is_deleted($diffinfo)) {
2324                 $result .= $cgi->a({-href => href(action=>"blob",
2325                                                   hash_base=>$hash,
2326                                                   hash=>$diffinfo->{'to_id'},
2327                                                   file_name=>$diffinfo->{'to_file'}),
2328                                     -class => "path"},
2329                                    esc_path($diffinfo->{'to_file'}));
2330         } else {
2331                 $result .= esc_path($diffinfo->{'to_file'});
2332         }
2333         $result .= "</div>\n" . # class="diff header"
2334                    "<div class=\"diff nodifferences\">" .
2335                    "Simple merge" .
2336                    "</div>\n"; # class="diff nodifferences"
2337
2338         return $result;
2339 }
2340
2341 sub diff_line_class {
2342         my ($line, $from, $to) = @_;
2343
2344         # ordinary diff
2345         my $num_sign = 1;
2346         # combined diff
2347         if ($from && $to && ref($from->{'href'}) eq "ARRAY") {
2348                 $num_sign = scalar @{$from->{'href'}};
2349         }
2350
2351         my @diff_line_classifier = (
2352                 { regexp => qr/^\@\@{$num_sign} /, class => "chunk_header"},
2353                 { regexp => qr/^\\/,               class => "incomplete"  },
2354                 { regexp => qr/^ {$num_sign}/,     class => "ctx" },
2355                 # classifier for context must come before classifier add/rem,
2356                 # or we would have to use more complicated regexp, for example
2357                 # qr/(?= {0,$m}\+)[+ ]{$num_sign}/, where $m = $num_sign - 1;
2358                 { regexp => qr/^[+ ]{$num_sign}/,   class => "add" },
2359                 { regexp => qr/^[- ]{$num_sign}/,   class => "rem" },
2360         );
2361         for my $clsfy (@diff_line_classifier) {
2362                 return $clsfy->{'class'}
2363                         if ($line =~ $clsfy->{'regexp'});
2364         }
2365
2366         # fallback
2367         return "";
2368 }
2369
2370 # assumes that $from and $to are defined and correctly filled,
2371 # and that $line holds a line of chunk header for unified diff
2372 sub format_unidiff_chunk_header {
2373         my ($line, $from, $to) = @_;
2374
2375         my ($from_text, $from_start, $from_lines, $to_text, $to_start, $to_lines, $section) =
2376                 $line =~ m/^\@{2} (-(\d+)(?:,(\d+))?) (\+(\d+)(?:,(\d+))?) \@{2}(.*)$/;
2377
2378         $from_lines = 0 unless defined $from_lines;
2379         $to_lines   = 0 unless defined $to_lines;
2380
2381         if ($from->{'href'}) {
2382                 $from_text = $cgi->a({-href=>"$from->{'href'}#l$from_start",
2383                                      -class=>"list"}, $from_text);
2384         }
2385         if ($to->{'href'}) {
2386                 $to_text   = $cgi->a({-href=>"$to->{'href'}#l$to_start",
2387                                      -class=>"list"}, $to_text);
2388         }
2389         $line = "<span class=\"chunk_info\">@@ $from_text $to_text @@</span>" .
2390                 "<span class=\"section\">" . esc_html($section, -nbsp=>1) . "</span>";
2391         return $line;
2392 }
2393
2394 # assumes that $from and $to are defined and correctly filled,
2395 # and that $line holds a line of chunk header for combined diff
2396 sub format_cc_diff_chunk_header {
2397         my ($line, $from, $to) = @_;
2398
2399         my ($prefix, $ranges, $section) = $line =~ m/^(\@+) (.*?) \@+(.*)$/;
2400         my (@from_text, @from_start, @from_nlines, $to_text, $to_start, $to_nlines);
2401
2402         @from_text = split(' ', $ranges);
2403         for (my $i = 0; $i < @from_text; ++$i) {
2404                 ($from_start[$i], $from_nlines[$i]) =
2405                         (split(',', substr($from_text[$i], 1)), 0);
2406         }
2407
2408         $to_text   = pop @from_text;
2409         $to_start  = pop @from_start;
2410         $to_nlines = pop @from_nlines;
2411
2412         $line = "<span class=\"chunk_info\">$prefix ";
2413         for (my $i = 0; $i < @from_text; ++$i) {
2414                 if ($from->{'href'}[$i]) {
2415                         $line .= $cgi->a({-href=>"$from->{'href'}[$i]#l$from_start[$i]",
2416                                           -class=>"list"}, $from_text[$i]);
2417                 } else {
2418                         $line .= $from_text[$i];
2419                 }
2420                 $line .= " ";
2421         }
2422         if ($to->{'href'}) {
2423                 $line .= $cgi->a({-href=>"$to->{'href'}#l$to_start",
2424                                   -class=>"list"}, $to_text);
2425         } else {
2426                 $line .= $to_text;
2427         }
2428         $line .= " $prefix</span>" .
2429                  "<span class=\"section\">" . esc_html($section, -nbsp=>1) . "</span>";
2430         return $line;
2431 }
2432
2433 # process patch (diff) line (not to be used for diff headers),
2434 # returning HTML-formatted (but not wrapped) line.
2435 # If the line is passed as a reference, it is treated as HTML and not
2436 # esc_html()'ed.
2437 sub format_diff_line {
2438         my ($line, $diff_class, $from, $to) = @_;
2439
2440         if (ref($line)) {
2441                 $line = $$line;
2442         } else {
2443                 chomp $line;
2444                 $line = untabify($line);
2445
2446                 if ($from && $to && $line =~ m/^\@{2} /) {
2447                         $line = format_unidiff_chunk_header($line, $from, $to);
2448                 } elsif ($from && $to && $line =~ m/^\@{3}/) {
2449                         $line = format_cc_diff_chunk_header($line, $from, $to);
2450                 } else {
2451                         $line = esc_html($line, -nbsp=>1);
2452                 }
2453         }
2454
2455         my $diff_classes = "diff";
2456         $diff_classes .= " $diff_class" if ($diff_class);
2457         $line = "<div class=\"$diff_classes\">$line</div>\n";
2458
2459         return $line;
2460 }
2461
2462 # Generates undef or something like "_snapshot_" or "snapshot (_tbz2_ _zip_)",
2463 # linked.  Pass the hash of the tree/commit to snapshot.
2464 sub format_snapshot_links {
2465         my ($hash) = @_;
2466         my $num_fmts = @snapshot_fmts;
2467         if ($num_fmts > 1) {
2468                 # A parenthesized list of links bearing format names.
2469                 # e.g. "snapshot (_tar.gz_ _zip_)"
2470                 return "snapshot (" . join(' ', map
2471                         $cgi->a({
2472                                 -href => href(
2473                                         action=>"snapshot",
2474                                         hash=>$hash,
2475                                         snapshot_format=>$_
2476                                 )
2477                         }, $known_snapshot_formats{$_}{'display'})
2478                 , @snapshot_fmts) . ")";
2479         } elsif ($num_fmts == 1) {
2480                 # A single "snapshot" link whose tooltip bears the format name.
2481                 # i.e. "_snapshot_"
2482                 my ($fmt) = @snapshot_fmts;
2483                 return
2484                         $cgi->a({
2485                                 -href => href(
2486                                         action=>"snapshot",
2487                                         hash=>$hash,
2488                                         snapshot_format=>$fmt
2489                                 ),
2490                                 -title => "in format: $known_snapshot_formats{$fmt}{'display'}"
2491                         }, "snapshot");
2492         } else { # $num_fmts == 0
2493                 return undef;
2494         }
2495 }
2496
2497 ## ......................................................................
2498 ## functions returning values to be passed, perhaps after some
2499 ## transformation, to other functions; e.g. returning arguments to href()
2500
2501 # returns hash to be passed to href to generate gitweb URL
2502 # in -title key it returns description of link
2503 sub get_feed_info {
2504         my $format = shift || 'Atom';
2505         my %res = (action => lc($format));
2506
2507         # feed links are possible only for project views
2508         return unless (defined $project);
2509         # some views should link to OPML, or to generic project feed,
2510         # or don't have specific feed yet (so they should use generic)
2511         return if (!$action || $action =~ /^(?:tags|heads|forks|tag|search)$/x);
2512
2513         my $branch;
2514         # branches refs uses 'refs/heads/' prefix (fullname) to differentiate
2515         # from tag links; this also makes possible to detect branch links
2516         if ((defined $hash_base && $hash_base =~ m!^refs/heads/(.*)$!) ||
2517             (defined $hash      && $hash      =~ m!^refs/heads/(.*)$!)) {
2518                 $branch = $1;
2519         }
2520         # find log type for feed description (title)
2521         my $type = 'log';
2522         if (defined $file_name) {
2523                 $type  = "history of $file_name";
2524                 $type .= "/" if ($action eq 'tree');
2525                 $type .= " on '$branch'" if (defined $branch);
2526         } else {
2527                 $type = "log of $branch" if (defined $branch);
2528         }
2529
2530         $res{-title} = $type;
2531         $res{'hash'} = (defined $branch ? "refs/heads/$branch" : undef);
2532         $res{'file_name'} = $file_name;
2533
2534         return %res;
2535 }
2536
2537 ## ----------------------------------------------------------------------
2538 ## git utility subroutines, invoking git commands
2539
2540 # returns path to the core git executable and the --git-dir parameter as list
2541 sub git_cmd {
2542         $number_of_git_cmds++;
2543         return $GIT, '--git-dir='.$git_dir;
2544 }
2545
2546 # quote the given arguments for passing them to the shell
2547 # quote_command("command", "arg 1", "arg with ' and ! characters")
2548 # => "'command' 'arg 1' 'arg with '\'' and '\!' characters'"
2549 # Try to avoid using this function wherever possible.
2550 sub quote_command {
2551         return join(' ',
2552                 map { my $a = $_; $a =~ s/(['!])/'\\$1'/g; "'$a'" } @_ );
2553 }
2554
2555 # get HEAD ref of given project as hash
2556 sub git_get_head_hash {
2557         return git_get_full_hash(shift, 'HEAD');
2558 }
2559
2560 sub git_get_full_hash {
2561         return git_get_hash(@_);
2562 }
2563
2564 sub git_get_short_hash {
2565         return git_get_hash(@_, '--short=7');
2566 }
2567
2568 sub git_get_hash {
2569         my ($project, $hash, @options) = @_;
2570         my $o_git_dir = $git_dir;
2571         my $retval = undef;
2572         $git_dir = "$projectroot/$project";
2573         if (open my $fd, '-|', git_cmd(), 'rev-parse',
2574             '--verify', '-q', @options, $hash) {
2575                 $retval = <$fd>;
2576                 chomp $retval if defined $retval;
2577                 close $fd;
2578         }
2579         if (defined $o_git_dir) {
2580                 $git_dir = $o_git_dir;
2581         }
2582         return $retval;
2583 }
2584
2585 # get type of given object
2586 sub git_get_type {
2587         my $hash = shift;
2588
2589         open my $fd, "-|", git_cmd(), "cat-file", '-t', $hash or return;
2590         my $type = <$fd>;
2591         close $fd or return;
2592         chomp $type;
2593         return $type;
2594 }
2595
2596 # repository configuration
2597 our $config_file = '';
2598 our %config;
2599
2600 # store multiple values for single key as anonymous array reference
2601 # single values stored directly in the hash, not as [ <value> ]
2602 sub hash_set_multi {
2603         my ($hash, $key, $value) = @_;
2604
2605         if (!exists $hash->{$key}) {
2606                 $hash->{$key} = $value;
2607         } elsif (!ref $hash->{$key}) {
2608                 $hash->{$key} = [ $hash->{$key}, $value ];
2609         } else {
2610                 push @{$hash->{$key}}, $value;
2611         }
2612 }
2613
2614 # return hash of git project configuration
2615 # optionally limited to some section, e.g. 'gitweb'
2616 sub git_parse_project_config {
2617         my $section_regexp = shift;
2618         my %config;
2619
2620         local $/ = "\0";
2621
2622         open my $fh, "-|", git_cmd(), "config", '-z', '-l',
2623                 or return;
2624
2625         while (my $keyval = <$fh>) {
2626                 chomp $keyval;
2627                 my ($key, $value) = split(/\n/, $keyval, 2);
2628
2629                 hash_set_multi(\%config, $key, $value)
2630                         if (!defined $section_regexp || $key =~ /^(?:$section_regexp)\./o);
2631         }
2632         close $fh;
2633
2634         return %config;
2635 }
2636
2637 # convert config value to boolean: 'true' or 'false'
2638 # no value, number > 0, 'true' and 'yes' values are true
2639 # rest of values are treated as false (never as error)
2640 sub config_to_bool {
2641         my $val = shift;
2642
2643         return 1 if !defined $val;             # section.key
2644
2645         # strip leading and trailing whitespace
2646         $val =~ s/^\s+//;
2647         $val =~ s/\s+$//;
2648
2649         return (($val =~ /^\d+$/ && $val) ||   # section.key = 1
2650                 ($val =~ /^(?:true|yes)$/i));  # section.key = true
2651 }
2652
2653 # convert config value to simple decimal number
2654 # an optional value suffix of 'k', 'm', or 'g' will cause the value
2655 # to be multiplied by 1024, 1048576, or 1073741824
2656 sub config_to_int {
2657         my $val = shift;
2658
2659         # strip leading and trailing whitespace
2660         $val =~ s/^\s+//;
2661         $val =~ s/\s+$//;
2662
2663         if (my ($num, $unit) = ($val =~ /^([0-9]*)([kmg])$/i)) {
2664                 $unit = lc($unit);
2665                 # unknown unit is treated as 1
2666                 return $num * ($unit eq 'g' ? 1073741824 :
2667                                $unit eq 'm' ?    1048576 :
2668                                $unit eq 'k' ?       1024 : 1);
2669         }
2670         return $val;
2671 }
2672
2673 # convert config value to array reference, if needed
2674 sub config_to_multi {
2675         my $val = shift;
2676
2677         return ref($val) ? $val : (defined($val) ? [ $val ] : []);
2678 }
2679
2680 sub git_get_project_config {
2681         my ($key, $type) = @_;
2682
2683         return unless defined $git_dir;
2684
2685         # key sanity check
2686         return unless ($key);
2687         # only subsection, if exists, is case sensitive,
2688         # and not lowercased by 'git config -z -l'
2689         if (my ($hi, $mi, $lo) = ($key =~ /^([^.]*)\.(.*)\.([^.]*)$/)) {
2690                 $key = join(".", lc($hi), $mi, lc($lo));
2691         } else {
2692                 $key = lc($key);
2693         }
2694         $key =~ s/^gitweb\.//;
2695         return if ($key =~ m/\W/);
2696
2697         # type sanity check
2698         if (defined $type) {
2699                 $type =~ s/^--//;
2700                 $type = undef
2701                         unless ($type eq 'bool' || $type eq 'int');
2702         }
2703
2704         # get config
2705         if (!defined $config_file ||
2706             $config_file ne "$git_dir/config") {
2707                 %config = git_parse_project_config('gitweb');
2708                 $config_file = "$git_dir/config";
2709         }
2710
2711         # check if config variable (key) exists
2712         return unless exists $config{"gitweb.$key"};
2713
2714         # ensure given type
2715         if (!defined $type) {
2716                 return $config{"gitweb.$key"};
2717         } elsif ($type eq 'bool') {
2718                 # backward compatibility: 'git config --bool' returns true/false
2719                 return config_to_bool($config{"gitweb.$key"}) ? 'true' : 'false';
2720         } elsif ($type eq 'int') {
2721                 return config_to_int($config{"gitweb.$key"});
2722         }
2723         return $config{"gitweb.$key"};
2724 }
2725
2726 # get hash of given path at given ref
2727 sub git_get_hash_by_path {
2728         my $base = shift;
2729         my $path = shift || return undef;
2730         my $type = shift;
2731
2732         $path =~ s,/+$,,;
2733
2734         open my $fd, "-|", git_cmd(), "ls-tree", $base, "--", $path
2735                 or die_error(500, "Open git-ls-tree failed");
2736         my $line = <$fd>;
2737         close $fd or return undef;
2738
2739         if (!defined $line) {
2740                 # there is no tree or hash given by $path at $base
2741                 return undef;
2742         }
2743
2744         #'100644 blob 0fa3f3a66fb6a137f6ec2c19351ed4d807070ffa  panic.c'
2745         $line =~ m/^([0-9]+) (.+) ([0-9a-fA-F]{40})\t/;
2746         if (defined $type && $type ne $2) {
2747                 # type doesn't match
2748                 return undef;
2749         }
2750         return $3;
2751 }
2752
2753 # get path of entry with given hash at given tree-ish (ref)
2754 # used to get 'from' filename for combined diff (merge commit) for renames
2755 sub git_get_path_by_hash {
2756         my $base = shift || return;
2757         my $hash = shift || return;
2758
2759         local $/ = "\0";
2760
2761         open my $fd, "-|", git_cmd(), "ls-tree", '-r', '-t', '-z', $base
2762                 or return undef;
2763         while (my $line = <$fd>) {
2764                 chomp $line;
2765
2766                 #'040000 tree 595596a6a9117ddba9fe379b6b012b558bac8423  gitweb'
2767                 #'100644 blob e02e90f0429be0d2a69b76571101f20b8f75530f  gitweb/README'
2768                 if ($line =~ m/(?:[0-9]+) (?:.+) $hash\t(.+)$/) {
2769                         close $fd;
2770                         return $1;
2771                 }
2772         }
2773         close $fd;
2774         return undef;
2775 }
2776
2777 ## ......................................................................
2778 ## git utility functions, directly accessing git repository
2779
2780 # get the value of config variable either from file named as the variable
2781 # itself in the repository ($GIT_DIR/$name file), or from gitweb.$name
2782 # configuration variable in the repository config file.
2783 sub git_get_file_or_project_config {
2784         my ($path, $name) = @_;
2785
2786         $git_dir = "$projectroot/$path";
2787         open my $fd, '<', "$git_dir/$name"
2788                 or return git_get_project_config($name);
2789         my $conf = <$fd>;
2790         close $fd;
2791         if (defined $conf) {
2792                 chomp $conf;
2793         }
2794         return $conf;
2795 }
2796
2797 sub git_get_project_description {
2798         my $path = shift;
2799         return git_get_file_or_project_config($path, 'description');
2800 }
2801
2802 sub git_get_project_category {
2803         my $path = shift;
2804         return git_get_file_or_project_config($path, 'category');
2805 }
2806
2807
2808 # supported formats:
2809 # * $GIT_DIR/ctags/<tagname> file (in 'ctags' subdirectory)
2810 #   - if its contents is a number, use it as tag weight,
2811 #   - otherwise add a tag with weight 1
2812 # * $GIT_DIR/ctags file, each line is a tag (with weight 1)
2813 #   the same value multiple times increases tag weight
2814 # * `gitweb.ctag' multi-valued repo config variable
2815 sub git_get_project_ctags {
2816         my $project = shift;
2817         my $ctags = {};
2818
2819         $git_dir = "$projectroot/$project";
2820         if (opendir my $dh, "$git_dir/ctags") {
2821                 my @files = grep { -f $_ } map { "$git_dir/ctags/$_" } readdir($dh);
2822                 foreach my $tagfile (@files) {
2823                         open my $ct, '<', $tagfile
2824                                 or next;
2825                         my $val = <$ct>;
2826                         chomp $val if $val;
2827                         close $ct;
2828
2829                         (my $ctag = $tagfile) =~ s#.*/##;
2830                         if ($val =~ /^\d+$/) {
2831                                 $ctags->{$ctag} = $val;
2832                         } else {
2833                                 $ctags->{$ctag} = 1;
2834                         }
2835                 }
2836                 closedir $dh;
2837
2838         } elsif (open my $fh, '<', "$git_dir/ctags") {
2839                 while (my $line = <$fh>) {
2840                         chomp $line;
2841                         $ctags->{$line}++ if $line;
2842                 }
2843                 close $fh;
2844
2845         } else {
2846                 my $taglist = config_to_multi(git_get_project_config('ctag'));
2847                 foreach my $tag (@$taglist) {
2848                         $ctags->{$tag}++;
2849                 }
2850         }
2851
2852         return $ctags;
2853 }
2854
2855 # return hash, where keys are content tags ('ctags'),
2856 # and values are sum of weights of given tag in every project
2857 sub git_gather_all_ctags {
2858         my $projects = shift;
2859         my $ctags = {};
2860
2861         foreach my $p (@$projects) {
2862                 foreach my $ct (keys %{$p->{'ctags'}}) {
2863                         $ctags->{$ct} += $p->{'ctags'}->{$ct};
2864                 }
2865         }
2866
2867         return $ctags;
2868 }
2869
2870 sub git_populate_project_tagcloud {
2871         my $ctags = shift;
2872
2873         # First, merge different-cased tags; tags vote on casing
2874         my %ctags_lc;
2875         foreach (keys %$ctags) {
2876                 $ctags_lc{lc $_}->{count} += $ctags->{$_};
2877                 if (not $ctags_lc{lc $_}->{topcount}
2878                     or $ctags_lc{lc $_}->{topcount} < $ctags->{$_}) {
2879                         $ctags_lc{lc $_}->{topcount} = $ctags->{$_};
2880                         $ctags_lc{lc $_}->{topname} = $_;
2881                 }
2882         }
2883
2884         my $cloud;
2885         my $matched = $input_params{'ctag'};
2886         if (eval { require HTML::TagCloud; 1; }) {
2887                 $cloud = HTML::TagCloud->new;
2888                 foreach my $ctag (sort keys %ctags_lc) {
2889                         # Pad the title with spaces so that the cloud looks
2890                         # less crammed.
2891                         my $title = esc_html($ctags_lc{$ctag}->{topname});
2892                         $title =~ s/ /&nbsp;/g;
2893                         $title =~ s/^/&nbsp;/g;
2894                         $title =~ s/$/&nbsp;/g;
2895                         if (defined $matched && $matched eq $ctag) {
2896                                 $title = qq(<span class="match">$title</span>);
2897                         }
2898                         $cloud->add($title, href(project=>undef, ctag=>$ctag),
2899                                     $ctags_lc{$ctag}->{count});
2900                 }
2901         } else {
2902                 $cloud = {};
2903                 foreach my $ctag (keys %ctags_lc) {
2904                         my $title = esc_html($ctags_lc{$ctag}->{topname}, -nbsp=>1);
2905                         if (defined $matched && $matched eq $ctag) {
2906                                 $title = qq(<span class="match">$title</span>);
2907                         }
2908                         $cloud->{$ctag}{count} = $ctags_lc{$ctag}->{count};
2909                         $cloud->{$ctag}{ctag} =
2910                                 $cgi->a({-href=>href(project=>undef, ctag=>$ctag)}, $title);
2911                 }
2912         }
2913         return $cloud;
2914 }
2915
2916 sub git_show_project_tagcloud {
2917         my ($cloud, $count) = @_;
2918         if (ref $cloud eq 'HTML::TagCloud') {
2919                 return $cloud->html_and_css($count);
2920         } else {
2921                 my @tags = sort { $cloud->{$a}->{'count'} <=> $cloud->{$b}->{'count'} } keys %$cloud;
2922                 return
2923                         '<div id="htmltagcloud"'.($project ? '' : ' align="center"').'>' .
2924                         join (', ', map {
2925                                 $cloud->{$_}->{'ctag'}
2926                         } splice(@tags, 0, $count)) .
2927                         '</div>';
2928         }
2929 }
2930
2931 sub git_get_project_url_list {
2932         my $path = shift;
2933
2934         $git_dir = "$projectroot/$path";
2935         open my $fd, '<', "$git_dir/cloneurl"
2936                 or return wantarray ?
2937                 @{ config_to_multi(git_get_project_config('url')) } :
2938                    config_to_multi(git_get_project_config('url'));
2939         my @git_project_url_list = map { chomp; $_ } <$fd>;
2940         close $fd;
2941
2942         return wantarray ? @git_project_url_list : \@git_project_url_list;
2943 }
2944
2945 sub git_get_projects_list {
2946         my $filter = shift || '';
2947         my $paranoid = shift;
2948         my @list;
2949
2950         if (-d $projects_list) {
2951                 # search in directory
2952                 my $dir = $projects_list;
2953                 # remove the trailing "/"
2954                 $dir =~ s!/+$!!;
2955                 my $pfxlen = length("$dir");
2956                 my $pfxdepth = ($dir =~ tr!/!!);
2957                 # when filtering, search only given subdirectory
2958                 if ($filter && !$paranoid) {
2959                         $dir .= "/$filter";
2960                         $dir =~ s!/+$!!;
2961                 }
2962
2963                 File::Find::find({
2964                         follow_fast => 1, # follow symbolic links
2965                         follow_skip => 2, # ignore duplicates
2966                         dangling_symlinks => 0, # ignore dangling symlinks, silently
2967                         wanted => sub {
2968                                 # global variables
2969                                 our $project_maxdepth;
2970                                 our $projectroot;
2971                                 # skip project-list toplevel, if we get it.
2972                                 return if (m!^[/.]$!);
2973                                 # only directories can be git repositories
2974                                 return unless (-d $_);
2975                                 # don't traverse too deep (Find is super slow on os x)
2976                                 # $project_maxdepth excludes depth of $projectroot
2977                                 if (($File::Find::name =~ tr!/!!) - $pfxdepth > $project_maxdepth) {
2978                                         $File::Find::prune = 1;
2979                                         return;
2980                                 }
2981
2982                                 my $path = substr($File::Find::name, $pfxlen + 1);
2983                                 # paranoidly only filter here
2984                                 if ($paranoid && $filter && $path !~ m!^\Q$filter\E/!) {
2985                                         next;
2986                                 }
2987                                 # we check related file in $projectroot
2988                                 if (check_export_ok("$projectroot/$path")) {
2989                                         push @list, { path => $path };
2990                                         $File::Find::prune = 1;
2991                                 }
2992                         },
2993                 }, "$dir");
2994
2995         } elsif (-f $projects_list) {
2996                 # read from file(url-encoded):
2997                 # 'git%2Fgit.git Linus+Torvalds'
2998                 # 'libs%2Fklibc%2Fklibc.git H.+Peter+Anvin'
2999                 # 'linux%2Fhotplug%2Fudev.git Greg+Kroah-Hartman'
3000                 open my $fd, '<', $projects_list or return;
3001         PROJECT:
3002                 while (my $line = <$fd>) {
3003                         chomp $line;
3004                         my ($path, $owner) = split ' ', $line;
3005                         $path = unescape($path);
3006                         $owner = unescape($owner);
3007                         if (!defined $path) {
3008                                 next;
3009                         }
3010                         # if $filter is rpovided, check if $path begins with $filter
3011                         if ($filter && $path !~ m!^\Q$filter\E/!) {
3012                                 next;
3013                         }
3014                         if (check_export_ok("$projectroot/$path")) {
3015                                 my $pr = {
3016                                         path => $path,
3017                                         owner => to_utf8($owner),
3018                                 };
3019                                 push @list, $pr;
3020                         }
3021                 }
3022                 close $fd;
3023         }
3024         return @list;
3025 }
3026
3027 # written with help of Tree::Trie module (Perl Artistic License, GPL compatibile)
3028 # as side effects it sets 'forks' field to list of forks for forked projects
3029 sub filter_forks_from_projects_list {
3030         my $projects = shift;
3031
3032         my %trie; # prefix tree of directories (path components)
3033         # generate trie out of those directories that might contain forks
3034         foreach my $pr (@$projects) {
3035                 my $path = $pr->{'path'};
3036                 $path =~ s/\.git$//;      # forks of 'repo.git' are in 'repo/' directory
3037                 next if ($path =~ m!/$!); # skip non-bare repositories, e.g. 'repo/.git'
3038                 next unless ($path);      # skip '.git' repository: tests, git-instaweb
3039                 next unless (-d "$projectroot/$path"); # containing directory exists
3040                 $pr->{'forks'} = [];      # there can be 0 or more forks of project
3041
3042                 # add to trie
3043                 my @dirs = split('/', $path);
3044                 # walk the trie, until either runs out of components or out of trie
3045                 my $ref = \%trie;
3046                 while (scalar @dirs &&
3047                        exists($ref->{$dirs[0]})) {
3048                         $ref = $ref->{shift @dirs};
3049                 }
3050                 # create rest of trie structure from rest of components
3051                 foreach my $dir (@dirs) {
3052                         $ref = $ref->{$dir} = {};
3053                 }
3054                 # create end marker, store $pr as a data
3055                 $ref->{''} = $pr if (!exists $ref->{''});
3056         }
3057
3058         # filter out forks, by finding shortest prefix match for paths
3059         my @filtered;
3060  PROJECT:
3061         foreach my $pr (@$projects) {
3062                 # trie lookup
3063                 my $ref = \%trie;
3064         DIR:
3065                 foreach my $dir (split('/', $pr->{'path'})) {
3066                         if (exists $ref->{''}) {
3067                                 # found [shortest] prefix, is a fork - skip it
3068                                 push @{$ref->{''}{'forks'}}, $pr;
3069                                 next PROJECT;
3070                         }
3071                         if (!exists $ref->{$dir}) {
3072                                 # not in trie, cannot have prefix, not a fork
3073                                 push @filtered, $pr;
3074                                 next PROJECT;
3075                         }
3076                         # If the dir is there, we just walk one step down the trie.
3077                         $ref = $ref->{$dir};
3078                 }
3079                 # we ran out of trie
3080                 # (shouldn't happen: it's either no match, or end marker)
3081                 push @filtered, $pr;
3082         }
3083
3084         return @filtered;
3085 }
3086
3087 # note: fill_project_list_info must be run first,
3088 # for 'descr_long' and 'ctags' to be filled
3089 sub search_projects_list {
3090         my ($projlist, %opts) = @_;
3091         my $tagfilter  = $opts{'tagfilter'};
3092         my $search_re = $opts{'search_regexp'};
3093
3094         return @$projlist
3095                 unless ($tagfilter || $search_re);
3096
3097         # searching projects require filling to be run before it;
3098         fill_project_list_info($projlist,
3099                                $tagfilter  ? 'ctags' : (),
3100                                $search_re ? ('path', 'descr') : ());
3101         my @projects;
3102  PROJECT:
3103         foreach my $pr (@$projlist) {
3104
3105                 if ($tagfilter) {
3106                         next unless ref($pr->{'ctags'}) eq 'HASH';
3107                         next unless
3108                                 grep { lc($_) eq lc($tagfilter) } keys %{$pr->{'ctags'}};
3109                 }
3110
3111                 if ($search_re) {
3112                         next unless
3113                                 $pr->{'path'} =~ /$search_re/ ||
3114                                 $pr->{'descr_long'} =~ /$search_re/;
3115                 }
3116
3117                 push @projects, $pr;
3118         }
3119
3120         return @projects;
3121 }
3122
3123 our $gitweb_project_owner = undef;
3124 sub git_get_project_list_from_file {
3125
3126         return if (defined $gitweb_project_owner);
3127
3128         $gitweb_project_owner = {};
3129         # read from file (url-encoded):
3130         # 'git%2Fgit.git Linus+Torvalds'
3131         # 'libs%2Fklibc%2Fklibc.git H.+Peter+Anvin'
3132         # 'linux%2Fhotplug%2Fudev.git Greg+Kroah-Hartman'
3133         if (-f $projects_list) {
3134                 open(my $fd, '<', $projects_list);
3135                 while (my $line = <$fd>) {
3136                         chomp $line;
3137                         my ($pr, $ow) = split ' ', $line;
3138                         $pr = unescape($pr);
3139                         $ow = unescape($ow);
3140                         $gitweb_project_owner->{$pr} = to_utf8($ow);
3141                 }
3142                 close $fd;
3143         }
3144 }
3145
3146 sub git_get_project_owner {
3147         my $project = shift;
3148         my $owner;
3149
3150         return undef unless $project;
3151         $git_dir = "$projectroot/$project";
3152
3153         if (!defined $gitweb_project_owner) {
3154                 git_get_project_list_from_file();
3155         }
3156
3157         if (exists $gitweb_project_owner->{$project}) {
3158                 $owner = $gitweb_project_owner->{$project};
3159         }
3160         if (!defined $owner){
3161                 $owner = git_get_project_config('owner');
3162         }
3163         if (!defined $owner) {
3164                 $owner = get_file_owner("$git_dir");
3165         }
3166
3167         return $owner;
3168 }
3169
3170 sub git_get_last_activity {
3171         my ($path) = @_;
3172         my $fd;
3173
3174         $git_dir = "$projectroot/$path";
3175         open($fd, "-|", git_cmd(), 'for-each-ref',
3176              '--format=%(committer)',
3177              '--sort=-committerdate',
3178              '--count=1',
3179              'refs/heads') or return;
3180         my $most_recent = <$fd>;
3181         close $fd or return;
3182         if (defined $most_recent &&
3183             $most_recent =~ / (\d+) [-+][01]\d\d\d$/) {
3184                 my $timestamp = $1;
3185                 my $age = time - $timestamp;
3186                 return ($age, age_string($age));
3187         }
3188         return (undef, undef);
3189 }
3190
3191 # Implementation note: when a single remote is wanted, we cannot use 'git
3192 # remote show -n' because that command always work (assuming it's a remote URL
3193 # if it's not defined), and we cannot use 'git remote show' because that would
3194 # try to make a network roundtrip. So the only way to find if that particular
3195 # remote is defined is to walk the list provided by 'git remote -v' and stop if
3196 # and when we find what we want.
3197 sub git_get_remotes_list {
3198         my $wanted = shift;
3199         my %remotes = ();
3200
3201         open my $fd, '-|' , git_cmd(), 'remote', '-v';
3202         return unless $fd;
3203         while (my $remote = <$fd>) {
3204                 chomp $remote;
3205                 $remote =~ s!\t(.*?)\s+\((\w+)\)$!!;
3206                 next if $wanted and not $remote eq $wanted;
3207                 my ($url, $key) = ($1, $2);
3208
3209                 $remotes{$remote} ||= { 'heads' => () };
3210                 $remotes{$remote}{$key} = $url;
3211         }
3212         close $fd or return;
3213         return wantarray ? %remotes : \%remotes;
3214 }
3215
3216 # Takes a hash of remotes as first parameter and fills it by adding the
3217 # available remote heads for each of the indicated remotes.
3218 sub fill_remote_heads {
3219         my $remotes = shift;
3220         my @heads = map { "remotes/$_" } keys %$remotes;
3221         my @remoteheads = git_get_heads_list(undef, @heads);
3222         foreach my $remote (keys %$remotes) {
3223                 $remotes->{$remote}{'heads'} = [ grep {
3224                         $_->{'name'} =~ s!^$remote/!!
3225                         } @remoteheads ];
3226         }
3227 }
3228
3229 sub git_get_references {
3230         my $type = shift || "";
3231         my %refs;
3232         # 5dc01c595e6c6ec9ccda4f6f69c131c0dd945f8c refs/tags/v2.6.11
3233         # c39ae07f393806ccf406ef966e9a15afc43cc36a refs/tags/v2.6.11^{}
3234         open my $fd, "-|", git_cmd(), "show-ref", "--dereference",
3235                 ($type ? ("--", "refs/$type") : ()) # use -- <pattern> if $type
3236                 or return;
3237
3238         while (my $line = <$fd>) {
3239                 chomp $line;
3240                 if ($line =~ m!^([0-9a-fA-F]{40})\srefs/($type.*)$!) {
3241                         if (defined $refs{$1}) {
3242                                 push @{$refs{$1}}, $2;
3243                         } else {
3244                                 $refs{$1} = [ $2 ];
3245                         }
3246                 }
3247         }
3248         close $fd or return;
3249         return \%refs;
3250 }
3251
3252 sub git_get_rev_name_tags {
3253         my $hash = shift || return undef;
3254
3255         open my $fd, "-|", git_cmd(), "name-rev", "--tags", $hash
3256                 or return;
3257         my $name_rev = <$fd>;
3258         close $fd;
3259
3260         if ($name_rev =~ m|^$hash tags/(.*)$|) {
3261                 return $1;
3262         } else {
3263                 # catches also '$hash undefined' output
3264                 return undef;
3265         }
3266 }
3267
3268 ## ----------------------------------------------------------------------
3269 ## parse to hash functions
3270
3271 sub parse_date {
3272         my $epoch = shift;
3273         my $tz = shift || "-0000";
3274
3275         my %date;
3276         my @months = ("Jan", "Feb", "Mar", "Apr", "May", "Jun", "Jul", "Aug", "Sep", "Oct", "Nov", "Dec");
3277         my @days = ("Sun", "Mon", "Tue", "Wed", "Thu", "Fri", "Sat");
3278         my ($sec, $min, $hour, $mday, $mon, $year, $wday, $yday) = gmtime($epoch);
3279         $date{'hour'} = $hour;
3280         $date{'minute'} = $min;
3281         $date{'mday'} = $mday;
3282         $date{'day'} = $days[$wday];
3283         $date{'month'} = $months[$mon];
3284         $date{'rfc2822'}   = sprintf "%s, %d %s %4d %02d:%02d:%02d +0000",
3285                              $days[$wday], $mday, $months[$mon], 1900+$year, $hour ,$min, $sec;
3286         $date{'mday-time'} = sprintf "%d %s %02d:%02d",
3287                              $mday, $months[$mon], $hour ,$min;
3288         $date{'iso-8601'}  = sprintf "%04d-%02d-%02dT%02d:%02d:%02dZ",
3289                              1900+$year, 1+$mon, $mday, $hour ,$min, $sec;
3290
3291         my ($tz_sign, $tz_hour, $tz_min) =
3292                 ($tz =~ m/^([-+])(\d\d)(\d\d)$/);
3293         $tz_sign = ($tz_sign eq '-' ? -1 : +1);
3294         my $local = $epoch + $tz_sign*((($tz_hour*60) + $tz_min)*60);
3295         ($sec, $min, $hour, $mday, $mon, $year, $wday, $yday) = gmtime($local);
3296         $date{'hour_local'} = $hour;
3297         $date{'minute_local'} = $min;
3298         $date{'tz_local'} = $tz;
3299         $date{'iso-tz'} = sprintf("%04d-%02d-%02d %02d:%02d:%02d %s",
3300                                   1900+$year, $mon+1, $mday,
3301                                   $hour, $min, $sec, $tz);
3302         return %date;
3303 }
3304
3305 sub parse_tag {
3306         my $tag_id = shift;
3307         my %tag;
3308         my @comment;
3309
3310         open my $fd, "-|", git_cmd(), "cat-file", "tag", $tag_id or return;
3311         $tag{'id'} = $tag_id;
3312         while (my $line = <$fd>) {
3313                 chomp $line;
3314                 if ($line =~ m/^object ([0-9a-fA-F]{40})$/) {
3315                         $tag{'object'} = $1;
3316                 } elsif ($line =~ m/^type (.+)$/) {
3317                         $tag{'type'} = $1;
3318                 } elsif ($line =~ m/^tag (.+)$/) {
3319                         $tag{'name'} = $1;
3320                 } elsif ($line =~ m/^tagger (.*) ([0-9]+) (.*)$/) {
3321                         $tag{'author'} = $1;
3322                         $tag{'author_epoch'} = $2;
3323                         $tag{'author_tz'} = $3;
3324                         if ($tag{'author'} =~ m/^([^<]+) <([^>]*)>/) {
3325                                 $tag{'author_name'}  = $1;
3326                                 $tag{'author_email'} = $2;
3327                         } else {
3328                                 $tag{'author_name'} = $tag{'author'};
3329                         }
3330                 } elsif ($line =~ m/--BEGIN/) {
3331                         push @comment, $line;
3332                         last;
3333                 } elsif ($line eq "") {
3334                         last;
3335                 }
3336         }
3337         push @comment, <$fd>;
3338         $tag{'comment'} = \@comment;
3339         close $fd or return;
3340         if (!defined $tag{'name'}) {
3341                 return
3342         };
3343         return %tag
3344 }
3345
3346 sub parse_commit_text {
3347         my ($commit_text, $withparents) = @_;
3348         my @commit_lines = split '\n', $commit_text;
3349         my %co;
3350
3351         pop @commit_lines; # Remove '\0'
3352
3353         if (! @commit_lines) {
3354                 return;
3355         }
3356
3357         my $header = shift @commit_lines;
3358         if ($header !~ m/^[0-9a-fA-F]{40}/) {
3359                 return;
3360         }
3361         ($co{'id'}, my @parents) = split ' ', $header;
3362         while (my $line = shift @commit_lines) {
3363                 last if $line eq "\n";
3364                 if ($line =~ m/^tree ([0-9a-fA-F]{40})$/) {
3365                         $co{'tree'} = $1;
3366                 } elsif ((!defined $withparents) && ($line =~ m/^parent ([0-9a-fA-F]{40})$/)) {
3367                         push @parents, $1;
3368                 } elsif ($line =~ m/^author (.*) ([0-9]+) (.*)$/) {
3369                         $co{'author'} = to_utf8($1);
3370                         $co{'author_epoch'} = $2;
3371                         $co{'author_tz'} = $3;
3372                         if ($co{'author'} =~ m/^([^<]+) <([^>]*)>/) {
3373                                 $co{'author_name'}  = $1;
3374                                 $co{'author_email'} = $2;
3375                         } else {
3376                                 $co{'author_name'} = $co{'author'};
3377                         }
3378                 } elsif ($line =~ m/^committer (.*) ([0-9]+) (.*)$/) {
3379                         $co{'committer'} = to_utf8($1);
3380                         $co{'committer_epoch'} = $2;
3381                         $co{'committer_tz'} = $3;
3382                         if ($co{'committer'} =~ m/^([^<]+) <([^>]*)>/) {
3383                                 $co{'committer_name'}  = $1;
3384                                 $co{'committer_email'} = $2;
3385                         } else {
3386                                 $co{'committer_name'} = $co{'committer'};
3387                         }
3388                 }
3389         }
3390         if (!defined $co{'tree'}) {
3391                 return;
3392         };
3393         $co{'parents'} = \@parents;
3394         $co{'parent'} = $parents[0];
3395
3396         foreach my $title (@commit_lines) {
3397                 $title =~ s/^    //;
3398                 if ($title ne "") {
3399                         $co{'title'} = chop_str($title, 80, 5);
3400                         # remove leading stuff of merges to make the interesting part visible
3401                         if (length($title) > 50) {
3402                                 $title =~ s/^Automatic //;
3403                                 $title =~ s/^merge (of|with) /Merge ... /i;
3404                                 if (length($title) > 50) {
3405                                         $title =~ s/(http|rsync):\/\///;
3406                                 }
3407                                 if (length($title) > 50) {
3408                                         $title =~ s/(master|www|rsync)\.//;
3409                                 }
3410                                 if (length($title) > 50) {
3411                                         $title =~ s/kernel.org:?//;
3412                                 }
3413                                 if (length($title) > 50) {
3414                                         $title =~ s/\/pub\/scm//;
3415                                 }
3416                         }
3417                         $co{'title_short'} = chop_str($title, 50, 5);
3418                         last;
3419                 }
3420         }
3421         if (! defined $co{'title'} || $co{'title'} eq "") {
3422                 $co{'title'} = $co{'title_short'} = '(no commit message)';
3423         }
3424         # remove added spaces
3425         foreach my $line (@commit_lines) {
3426                 $line =~ s/^    //;
3427         }
3428         $co{'comment'} = \@commit_lines;
3429
3430         my $age = time - $co{'committer_epoch'};
3431         $co{'age'} = $age;
3432         $co{'age_string'} = age_string($age);
3433         my ($sec, $min, $hour, $mday, $mon, $year, $wday, $yday) = gmtime($co{'committer_epoch'});
3434         if ($age > 60*60*24*7*2) {
3435                 $co{'age_string_date'} = sprintf "%4i-%02u-%02i", 1900 + $year, $mon+1, $mday;
3436                 $co{'age_string_age'} = $co{'age_string'};
3437         } else {
3438                 $co{'age_string_date'} = $co{'age_string'};
3439                 $co{'age_string_age'} = sprintf "%4i-%02u-%02i", 1900 + $year, $mon+1, $mday;
3440         }
3441         return %co;
3442 }
3443
3444 sub parse_commit {
3445         my ($commit_id) = @_;
3446         my %co;
3447
3448         local $/ = "\0";
3449
3450         open my $fd, "-|", git_cmd(), "rev-list",
3451                 "--parents",
3452                 "--header",
3453                 "--max-count=1",
3454                 $commit_id,
3455                 "--",
3456                 or die_error(500, "Open git-rev-list failed");
3457         %co = parse_commit_text(<$fd>, 1);
3458         close $fd;
3459
3460         return %co;
3461 }
3462
3463 sub parse_commits {
3464         my ($commit_id, $maxcount, $skip, $filename, @args) = @_;
3465         my @cos;
3466
3467         $maxcount ||= 1;
3468         $skip ||= 0;
3469
3470         local $/ = "\0";
3471
3472         open my $fd, "-|", git_cmd(), "rev-list",
3473                 "--header",
3474                 @args,
3475                 ("--max-count=" . $maxcount),
3476                 ("--skip=" . $skip),
3477                 @extra_options,
3478                 $commit_id,
3479                 "--",
3480                 ($filename ? ($filename) : ())
3481                 or die_error(500, "Open git-rev-list failed");
3482         while (my $line = <$fd>) {
3483                 my %co = parse_commit_text($line);
3484                 push @cos, \%co;
3485         }
3486         close $fd;
3487
3488         return wantarray ? @cos : \@cos;
3489 }
3490
3491 # parse line of git-diff-tree "raw" output
3492 sub parse_difftree_raw_line {
3493         my $line = shift;
3494         my %res;
3495
3496         # ':100644 100644 03b218260e99b78c6df0ed378e59ed9205ccc96d 3b93d5e7cc7f7dd4ebed13a5cc1a4ad976fc94d8 M   ls-files.c'
3497         # ':100644 100644 7f9281985086971d3877aca27704f2aaf9c448ce bc190ebc71bbd923f2b728e505408f5e54bd073a M   rev-tree.c'
3498         if ($line =~ m/^:([0-7]{6}) ([0-7]{6}) ([0-9a-fA-F]{40}) ([0-9a-fA-F]{40}) (.)([0-9]{0,3})\t(.*)$/) {
3499                 $res{'from_mode'} = $1;
3500                 $res{'to_mode'} = $2;
3501                 $res{'from_id'} = $3;
3502                 $res{'to_id'} = $4;
3503                 $res{'status'} = $5;
3504                 $res{'similarity'} = $6;
3505                 if ($res{'status'} eq 'R' || $res{'status'} eq 'C') { # renamed or copied
3506                         ($res{'from_file'}, $res{'to_file'}) = map { unquote($_) } split("\t", $7);
3507                 } else {
3508                         $res{'from_file'} = $res{'to_file'} = $res{'file'} = unquote($7);
3509                 }
3510         }
3511         # '::100755 100755 100755 60e79ca1b01bc8b057abe17ddab484699a7f5fdb 94067cc5f73388f33722d52ae02f44692bc07490 94067cc5f73388f33722d52ae02f44692bc07490 MR git-gui/git-gui.sh'
3512         # combined diff (for merge commit)
3513         elsif ($line =~ s/^(::+)((?:[0-7]{6} )+)((?:[0-9a-fA-F]{40} )+)([a-zA-Z]+)\t(.*)$//) {
3514                 $res{'nparents'}  = length($1);
3515                 $res{'from_mode'} = [ split(' ', $2) ];
3516                 $res{'to_mode'} = pop @{$res{'from_mode'}};
3517                 $res{'from_id'} = [ split(' ', $3) ];
3518                 $res{'to_id'} = pop @{$res{'from_id'}};
3519                 $res{'status'} = [ split('', $4) ];
3520                 $res{'to_file'} = unquote($5);
3521         }
3522         # 'c512b523472485aef4fff9e57b229d9d243c967f'
3523         elsif ($line =~ m/^([0-9a-fA-F]{40})$/) {
3524                 $res{'commit'} = $1;
3525         }
3526
3527         return wantarray ? %res : \%res;
3528 }
3529
3530 # wrapper: return parsed line of git-diff-tree "raw" output
3531 # (the argument might be raw line, or parsed info)
3532 sub parsed_difftree_line {
3533         my $line_or_ref = shift;
3534
3535         if (ref($line_or_ref) eq "HASH") {
3536                 # pre-parsed (or generated by hand)
3537                 return $line_or_ref;
3538         } else {
3539                 return parse_difftree_raw_line($line_or_ref);
3540         }
3541 }
3542
3543 # parse line of git-ls-tree output
3544 sub parse_ls_tree_line {
3545         my $line = shift;
3546         my %opts = @_;
3547         my %res;
3548
3549         if ($opts{'-l'}) {
3550                 #'100644 blob 0fa3f3a66fb6a137f6ec2c19351ed4d807070ffa   16717  panic.c'
3551                 $line =~ m/^([0-9]+) (.+) ([0-9a-fA-F]{40}) +(-|[0-9]+)\t(.+)$/s;
3552
3553                 $res{'mode'} = $1;
3554                 $res{'type'} = $2;
3555                 $res{'hash'} = $3;
3556                 $res{'size'} = $4;
3557                 if ($opts{'-z'}) {
3558                         $res{'name'} = $5;
3559                 } else {
3560                         $res{'name'} = unquote($5);
3561                 }
3562         } else {
3563                 #'100644 blob 0fa3f3a66fb6a137f6ec2c19351ed4d807070ffa  panic.c'
3564                 $line =~ m/^([0-9]+) (.+) ([0-9a-fA-F]{40})\t(.+)$/s;
3565
3566                 $res{'mode'} = $1;
3567                 $res{'type'} = $2;
3568                 $res{'hash'} = $3;
3569                 if ($opts{'-z'}) {
3570                         $res{'name'} = $4;
3571                 } else {
3572                         $res{'name'} = unquote($4);
3573                 }
3574         }
3575
3576         return wantarray ? %res : \%res;
3577 }
3578
3579 # generates _two_ hashes, references to which are passed as 2 and 3 argument
3580 sub parse_from_to_diffinfo {
3581         my ($diffinfo, $from, $to, @parents) = @_;
3582
3583         if ($diffinfo->{'nparents'}) {
3584                 # combined diff
3585                 $from->{'file'} = [];
3586                 $from->{'href'} = [];
3587                 fill_from_file_info($diffinfo, @parents)
3588                         unless exists $diffinfo->{'from_file'};
3589                 for (my $i = 0; $i < $diffinfo->{'nparents'}; $i++) {
3590                         $from->{'file'}[$i] =
3591                                 defined $diffinfo->{'from_file'}[$i] ?
3592                                         $diffinfo->{'from_file'}[$i] :
3593                                         $diffinfo->{'to_file'};
3594                         if ($diffinfo->{'status'}[$i] ne "A") { # not new (added) file
3595                                 $from->{'href'}[$i] = href(action=>"blob",
3596                                                            hash_base=>$parents[$i],
3597                                                            hash=>$diffinfo->{'from_id'}[$i],
3598                                                            file_name=>$from->{'file'}[$i]);
3599                         } else {
3600                                 $from->{'href'}[$i] = undef;
3601                         }
3602                 }
3603         } else {
3604                 # ordinary (not combined) diff
3605                 $from->{'file'} = $diffinfo->{'from_file'};
3606                 if ($diffinfo->{'status'} ne "A") { # not new (added) file
3607                         $from->{'href'} = href(action=>"blob", hash_base=>$hash_parent,
3608                                                hash=>$diffinfo->{'from_id'},
3609                                                file_name=>$from->{'file'});
3610                 } else {
3611                         delete $from->{'href'};
3612                 }
3613         }
3614
3615         $to->{'file'} = $diffinfo->{'to_file'};
3616         if (!is_deleted($diffinfo)) { # file exists in result
3617                 $to->{'href'} = href(action=>"blob", hash_base=>$hash,
3618                                      hash=>$diffinfo->{'to_id'},
3619                                      file_name=>$to->{'file'});
3620         } else {
3621                 delete $to->{'href'};
3622         }
3623 }
3624
3625 ## ......................................................................
3626 ## parse to array of hashes functions
3627
3628 sub git_get_heads_list {
3629         my ($limit, @classes) = @_;
3630         @classes = ('heads') unless @classes;
3631         my @patterns = map { "refs/$_" } @classes;
3632         my @headslist;
3633
3634         open my $fd, '-|', git_cmd(), 'for-each-ref',
3635                 ($limit ? '--count='.($limit+1) : ()), '--sort=-committerdate',
3636                 '--format=%(objectname) %(refname) %(subject)%00%(committer)',
3637                 @patterns
3638                 or return;
3639         while (my $line = <$fd>) {
3640                 my %ref_item;
3641
3642                 chomp $line;
3643                 my ($refinfo, $committerinfo) = split(/\0/, $line);
3644                 my ($hash, $name, $title) = split(' ', $refinfo, 3);
3645                 my ($committer, $epoch, $tz) =
3646                         ($committerinfo =~ /^(.*) ([0-9]+) (.*)$/);
3647                 $ref_item{'fullname'}  = $name;
3648                 $name =~ s!^refs/(?:head|remote)s/!!;
3649
3650                 $ref_item{'name'}  = $name;
3651                 $ref_item{'id'}    = $hash;
3652                 $ref_item{'title'} = $title || '(no commit message)';
3653                 $ref_item{'epoch'} = $epoch;
3654                 if ($epoch) {
3655                         $ref_item{'age'} = age_string(time - $ref_item{'epoch'});
3656                 } else {
3657                         $ref_item{'age'} = "unknown";
3658                 }
3659
3660                 push @headslist, \%ref_item;
3661         }
3662         close $fd;
3663
3664         return wantarray ? @headslist : \@headslist;
3665 }
3666
3667 sub git_get_tags_list {
3668         my $limit = shift;
3669         my @tagslist;
3670
3671         open my $fd, '-|', git_cmd(), 'for-each-ref',
3672                 ($limit ? '--count='.($limit+1) : ()), '--sort=-creatordate',
3673                 '--format=%(objectname) %(objecttype) %(refname) '.
3674                 '%(*objectname) %(*objecttype) %(subject)%00%(creator)',
3675                 'refs/tags'
3676                 or return;
3677         while (my $line = <$fd>) {
3678                 my %ref_item;
3679
3680                 chomp $line;
3681                 my ($refinfo, $creatorinfo) = split(/\0/, $line);
3682                 my ($id, $type, $name, $refid, $reftype, $title) = split(' ', $refinfo, 6);
3683                 my ($creator, $epoch, $tz) =
3684                         ($creatorinfo =~ /^(.*) ([0-9]+) (.*)$/);
3685                 $ref_item{'fullname'} = $name;
3686                 $name =~ s!^refs/tags/!!;
3687
3688                 $ref_item{'type'} = $type;
3689                 $ref_item{'id'} = $id;
3690                 $ref_item{'name'} = $name;
3691                 if ($type eq "tag") {
3692                         $ref_item{'subject'} = $title;
3693                         $ref_item{'reftype'} = $reftype;
3694                         $ref_item{'refid'}   = $refid;
3695                 } else {
3696                         $ref_item{'reftype'} = $type;
3697                         $ref_item{'refid'}   = $id;
3698                 }
3699
3700                 if ($type eq "tag" || $type eq "commit") {
3701                         $ref_item{'epoch'} = $epoch;
3702                         if ($epoch) {
3703                                 $ref_item{'age'} = age_string(time - $ref_item{'epoch'});
3704                         } else {
3705                                 $ref_item{'age'} = "unknown";
3706                         }
3707                 }
3708
3709                 push @tagslist, \%ref_item;
3710         }
3711         close $fd;
3712
3713         return wantarray ? @tagslist : \@tagslist;
3714 }
3715
3716 ## ----------------------------------------------------------------------
3717 ## filesystem-related functions
3718
3719 sub get_file_owner {
3720         my $path = shift;
3721
3722         my ($dev, $ino, $mode, $nlink, $st_uid, $st_gid, $rdev, $size) = stat($path);
3723         my ($name, $passwd, $uid, $gid, $quota, $comment, $gcos, $dir, $shell) = getpwuid($st_uid);
3724         if (!defined $gcos) {
3725                 return undef;
3726         }
3727         my $owner = $gcos;
3728         $owner =~ s/[,;].*$//;
3729         return to_utf8($owner);
3730 }
3731
3732 # assume that file exists
3733 sub insert_file {
3734         my $filename = shift;
3735
3736         open my $fd, '<', $filename;
3737         print map { to_utf8($_) } <$fd>;
3738         close $fd;
3739 }
3740
3741 ## ......................................................................
3742 ## mimetype related functions
3743
3744 sub mimetype_guess_file {
3745         my $filename = shift;
3746         my $mimemap = shift;
3747         -r $mimemap or return undef;
3748
3749         my %mimemap;
3750         open(my $mh, '<', $mimemap) or return undef;
3751         while (<$mh>) {
3752                 next if m/^#/; # skip comments
3753                 my ($mimetype, @exts) = split(/\s+/);
3754                 foreach my $ext (@exts) {
3755                         $mimemap{$ext} = $mimetype;
3756                 }
3757         }
3758         close($mh);
3759
3760         $filename =~ /\.([^.]*)$/;
3761         return $mimemap{$1};
3762 }
3763
3764 sub mimetype_guess {
3765         my $filename = shift;
3766         my $mime;
3767         $filename =~ /\./ or return undef;
3768
3769         if ($mimetypes_file) {
3770                 my $file = $mimetypes_file;
3771                 if ($file !~ m!^/!) { # if it is relative path
3772                         # it is relative to project
3773                         $file = "$projectroot/$project/$file";
3774                 }
3775                 $mime = mimetype_guess_file($filename, $file);
3776         }
3777         $mime ||= mimetype_guess_file($filename, '/etc/mime.types');
3778         return $mime;
3779 }
3780
3781 sub blob_mimetype {
3782         my $fd = shift;
3783         my $filename = shift;
3784
3785         if ($filename) {
3786                 my $mime = mimetype_guess($filename);
3787                 $mime and return $mime;
3788         }
3789
3790         # just in case
3791         return $default_blob_plain_mimetype unless $fd;
3792
3793         if (-T $fd) {
3794                 return 'text/plain';
3795         } elsif (! $filename) {
3796                 return 'application/octet-stream';
3797         } elsif ($filename =~ m/\.png$/i) {
3798                 return 'image/png';
3799         } elsif ($filename =~ m/\.gif$/i) {
3800                 return 'image/gif';
3801         } elsif ($filename =~ m/\.jpe?g$/i) {
3802                 return 'image/jpeg';
3803         } else {
3804                 return 'application/octet-stream';
3805         }
3806 }
3807
3808 sub blob_contenttype {
3809         my ($fd, $file_name, $type) = @_;
3810
3811         $type ||= blob_mimetype($fd, $file_name);
3812         if ($type eq 'text/plain' && defined $default_text_plain_charset) {
3813                 $type .= "; charset=$default_text_plain_charset";
3814         }
3815
3816         return $type;
3817 }
3818
3819 # guess file syntax for syntax highlighting; return undef if no highlighting
3820 # the name of syntax can (in the future) depend on syntax highlighter used
3821 sub guess_file_syntax {
3822         my ($highlight, $mimetype, $file_name) = @_;
3823         return undef unless ($highlight && defined $file_name);
3824         my $basename = basename($file_name, '.in');
3825         return $highlight_basename{$basename}
3826                 if exists $highlight_basename{$basename};
3827
3828         $basename =~ /\.([^.]*)$/;
3829         my $ext = $1 or return undef;
3830         return $highlight_ext{$ext}
3831                 if exists $highlight_ext{$ext};
3832
3833         return undef;
3834 }
3835
3836 # run highlighter and return FD of its output,
3837 # or return original FD if no highlighting
3838 sub run_highlighter {
3839         my ($fd, $highlight, $syntax) = @_;
3840         return $fd unless ($highlight && defined $syntax);
3841
3842         close $fd;
3843         open $fd, quote_command(git_cmd(), "cat-file", "blob", $hash)." | ".
3844                   quote_command($highlight_bin).
3845                   " --replace-tabs=8 --fragment --syntax $syntax |"
3846                 or die_error(500, "Couldn't open file or run syntax highlighter");
3847         return $fd;
3848 }
3849
3850 ## ======================================================================
3851 ## functions printing HTML: header, footer, error page
3852
3853 sub get_page_title {
3854         my $title = to_utf8($site_name);
3855
3856         unless (defined $project) {
3857                 if (defined $project_filter) {
3858                         $title .= " - projects in '" . esc_path($project_filter) . "'";
3859                 }
3860                 return $title;
3861         }
3862         $title .= " - " . to_utf8($project);
3863
3864         return $title unless (defined $action);
3865         $title .= "/$action"; # $action is US-ASCII (7bit ASCII)
3866
3867         return $title unless (defined $file_name);
3868         $title .= " - " . esc_path($file_name);
3869         if ($action eq "tree" && $file_name !~ m|/$|) {
3870                 $title .= "/";
3871         }
3872
3873         return $title;
3874 }
3875
3876 sub get_content_type_html {
3877         # require explicit support from the UA if we are to send the page as
3878         # 'application/xhtml+xml', otherwise send it as plain old 'text/html'.
3879         # we have to do this because MSIE sometimes globs '*/*', pretending to
3880         # support xhtml+xml but choking when it gets what it asked for.
3881         if (defined $cgi->http('HTTP_ACCEPT') &&
3882             $cgi->http('HTTP_ACCEPT') =~ m/(,|;|\s|^)application\/xhtml\+xml(,|;|\s|$)/ &&
3883             $cgi->Accept('application/xhtml+xml') != 0) {
3884                 return 'application/xhtml+xml';
3885         } else {
3886                 return 'text/html';
3887         }
3888 }
3889
3890 sub print_feed_meta {
3891         if (defined $project) {
3892                 my %href_params = get_feed_info();
3893                 if (!exists $href_params{'-title'}) {
3894                         $href_params{'-title'} = 'log';
3895                 }
3896
3897                 foreach my $format (qw(RSS Atom)) {
3898                         my $type = lc($format);
3899                         my %link_attr = (
3900                                 '-rel' => 'alternate',
3901                                 '-title' => esc_attr("$project - $href_params{'-title'} - $format feed"),
3902                                 '-type' => "application/$type+xml"
3903                         );
3904
3905                         $href_params{'extra_options'} = undef;
3906                         $href_params{'action'} = $type;
3907                         $link_attr{'-href'} = href(%href_params);
3908                         print "<link ".
3909                               "rel=\"$link_attr{'-rel'}\" ".
3910                               "title=\"$link_attr{'-title'}\" ".
3911                               "href=\"$link_attr{'-href'}\" ".
3912                               "type=\"$link_attr{'-type'}\" ".
3913                               "/>\n";
3914
3915                         $href_params{'extra_options'} = '--no-merges';
3916                         $link_attr{'-href'} = href(%href_params);
3917                         $link_attr{'-title'} .= ' (no merges)';
3918                         print "<link ".
3919                               "rel=\"$link_attr{'-rel'}\" ".
3920                               "title=\"$link_attr{'-title'}\" ".
3921                               "href=\"$link_attr{'-href'}\" ".
3922                               "type=\"$link_attr{'-type'}\" ".
3923                               "/>\n";
3924                 }
3925
3926         } else {
3927                 printf('<link rel="alternate" title="%s projects list" '.
3928                        'href="%s" type="text/plain; charset=utf-8" />'."\n",
3929                        esc_attr($site_name), href(project=>undef, action=>"project_index"));
3930                 printf('<link rel="alternate" title="%s projects feeds" '.
3931                        'href="%s" type="text/x-opml" />'."\n",
3932                        esc_attr($site_name), href(project=>undef, action=>"opml"));
3933         }
3934 }
3935
3936 sub print_header_links {
3937         my $status = shift;
3938
3939         # print out each stylesheet that exist, providing backwards capability
3940         # for those people who defined $stylesheet in a config file
3941         if (defined $stylesheet) {
3942                 print '<link rel="stylesheet" type="text/css" href="'.esc_url($stylesheet).'"/>'."\n";
3943         } else {
3944                 foreach my $stylesheet (@stylesheets) {
3945                         next unless $stylesheet;
3946                         print '<link rel="stylesheet" type="text/css" href="'.esc_url($stylesheet).'"/>'."\n";
3947                 }
3948         }
3949         print_feed_meta()
3950                 if ($status eq '200 OK');
3951         if (defined $favicon) {
3952                 print qq(<link rel="shortcut icon" href=").esc_url($favicon).qq(" type="image/png" />\n);
3953         }
3954 }
3955
3956 sub print_nav_breadcrumbs_path {
3957         my $dirprefix = undef;
3958         while (my $part = shift) {
3959                 $dirprefix .= "/" if defined $dirprefix;
3960                 $dirprefix .= $part;
3961                 print $cgi->a({-href => href(project => undef,
3962                                              project_filter => $dirprefix,
3963                                              action => "project_list")},
3964                               esc_html($part)) . " / ";
3965         }
3966 }
3967
3968 sub print_nav_breadcrumbs {
3969         my %opts = @_;
3970
3971         print $cgi->a({-href => esc_url($home_link)}, $home_link_str) . " / ";
3972         if (defined $project) {
3973                 my @dirname = split '/', $project;
3974                 my $projectbasename = pop @dirname;
3975                 print_nav_breadcrumbs_path(@dirname);
3976                 print $cgi->a({-href => href(action=>"summary")}, esc_html($projectbasename));
3977                 if (defined $action) {
3978                         my $action_print = $action ;
3979                         if (defined $opts{-action_extra}) {
3980                                 $action_print = $cgi->a({-href => href(action=>$action)},
3981                                         $action);
3982                         }
3983                         print " / $action_print";
3984                 }
3985                 if (defined $opts{-action_extra}) {
3986                         print " / $opts{-action_extra}";
3987                 }
3988                 print "\n";
3989         } elsif (defined $project_filter) {
3990                 print_nav_breadcrumbs_path(split '/', $project_filter);
3991         }
3992 }
3993
3994 sub print_search_form {
3995         if (!defined $searchtext) {
3996                 $searchtext = "";
3997         }
3998         my $search_hash;
3999         if (defined $hash_base) {
4000                 $search_hash = $hash_base;
4001         } elsif (defined $hash) {
4002                 $search_hash = $hash;
4003         } else {
4004                 $search_hash = "HEAD";
4005         }
4006         my $action = $my_uri;
4007         my $use_pathinfo = gitweb_check_feature('pathinfo');
4008         if ($use_pathinfo) {
4009                 $action .= "/".esc_url($project);
4010         }
4011         print $cgi->startform(-method => "get", -action => $action) .
4012               "<div class=\"search\">\n" .
4013               (!$use_pathinfo &&
4014               $cgi->input({-name=>"p", -value=>$project, -type=>"hidden"}) . "\n") .
4015               $cgi->input({-name=>"a", -value=>"search", -type=>"hidden"}) . "\n" .
4016               $cgi->input({-name=>"h", -value=>$search_hash, -type=>"hidden"}) . "\n" .
4017               $cgi->popup_menu(-name => 'st', -default => 'commit',
4018                                -values => ['commit', 'grep', 'author', 'committer', 'pickaxe']) .
4019               $cgi->sup($cgi->a({-href => href(action=>"search_help")}, "?")) .
4020               " search:\n",
4021               $cgi->textfield(-name => "s", -value => $searchtext, -override => 1) . "\n" .
4022               "<span title=\"Extended regular expression\">" .
4023               $cgi->checkbox(-name => 'sr', -value => 1, -label => 're',
4024                              -checked => $search_use_regexp) .
4025               "</span>" .
4026               "</div>" .
4027               $cgi->end_form() . "\n";
4028 }
4029
4030 sub git_header_html {
4031         my $status = shift || "200 OK";
4032         my $expires = shift;
4033         my %opts = @_;
4034
4035         my $title = get_page_title();
4036         my $content_type = get_content_type_html();
4037         print $cgi->header(-type=>$content_type, -charset => 'utf-8',
4038                            -status=> $status, -expires => $expires)
4039                 unless ($opts{'-no_http_header'});
4040         my $mod_perl_version = $ENV{'MOD_PERL'} ? " $ENV{'MOD_PERL'}" : '';
4041         print <<EOF;
4042 <?xml version="1.0" encoding="utf-8"?>
4043 <!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Strict//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-strict.dtd">
4044 <html xmlns="http://www.w3.org/1999/xhtml" xml:lang="en-US" lang="en-US">
4045 <!-- git web interface version $version, (C) 2005-2006, Kay Sievers <kay.sievers\@vrfy.org>, Christian Gierke -->
4046 <!-- git core binaries version $git_version -->
4047 <head>
4048 <meta http-equiv="content-type" content="$content_type; charset=utf-8"/>
4049 <meta name="generator" content="gitweb/$version git/$git_version$mod_perl_version"/>
4050 <meta name="robots" content="index, nofollow"/>
4051 <title>$title</title>
4052 EOF
4053         # the stylesheet, favicon etc urls won't work correctly with path_info
4054         # unless we set the appropriate base URL
4055         if ($ENV{'PATH_INFO'}) {
4056                 print "<base href=\"".esc_url($base_url)."\" />\n";
4057         }
4058         print_header_links($status);
4059
4060         if (defined $site_html_head_string) {
4061                 print to_utf8($site_html_head_string);
4062         }
4063
4064         print "</head>\n" .
4065               "<body>\n";
4066
4067         if (defined $site_header && -f $site_header) {
4068                 insert_file($site_header);
4069         }
4070
4071         print "<div class=\"page_header\">\n";
4072         if (defined $logo) {
4073                 print $cgi->a({-href => esc_url($logo_url),
4074                                -title => $logo_label},
4075                               $cgi->img({-src => esc_url($logo),
4076                                          -width => 72, -height => 27,
4077                                          -alt => "git",
4078                                          -class => "logo"}));
4079         }
4080         print_nav_breadcrumbs(%opts);
4081         print "</div>\n";
4082
4083         my $have_search = gitweb_check_feature('search');
4084         if (defined $project && $have_search) {
4085                 print_search_form();
4086         }
4087 }
4088
4089 sub git_footer_html {
4090         my $feed_class = 'rss_logo';
4091
4092         print "<div class=\"page_footer\">\n";
4093         if (defined $project) {
4094                 my $descr = git_get_project_description($project);
4095                 if (defined $descr) {
4096                         print "<div class=\"page_footer_text\">" . esc_html($descr) . "</div>\n";
4097                 }
4098
4099                 my %href_params = get_feed_info();
4100                 if (!%href_params) {
4101                         $feed_class .= ' generic';
4102                 }
4103                 $href_params{'-title'} ||= 'log';
4104
4105                 foreach my $format (qw(RSS Atom)) {
4106                         $href_params{'action'} = lc($format);
4107                         print $cgi->a({-href => href(%href_params),
4108                                       -title => "$href_params{'-title'} $format feed",
4109                                       -class => $feed_class}, $format)."\n";
4110                 }
4111
4112         } else {
4113                 print $cgi->a({-href => href(project=>undef, action=>"opml",
4114                                              project_filter => $project_filter),
4115                               -class => $feed_class}, "OPML") . " ";
4116                 print $cgi->a({-href => href(project=>undef, action=>"project_index",
4117                                              project_filter => $project_filter),
4118                               -class => $feed_class}, "TXT") . "\n";
4119         }
4120         print "</div>\n"; # class="page_footer"
4121
4122         if (defined $t0 && gitweb_check_feature('timed')) {
4123                 print "<div id=\"generating_info\">\n";
4124                 print 'This page took '.
4125                       '<span id="generating_time" class="time_span">'.
4126                       tv_interval($t0, [ gettimeofday() ]).
4127                       ' seconds </span>'.
4128                       ' and '.
4129                       '<span id="generating_cmd">'.
4130                       $number_of_git_cmds.
4131                       '</span> git commands '.
4132                       " to generate.\n";
4133                 print "</div>\n"; # class="page_footer"
4134         }
4135
4136         if (defined $site_footer && -f $site_footer) {
4137                 insert_file($site_footer);
4138         }
4139
4140         print qq!<script type="text/javascript" src="!.esc_url($javascript).qq!"></script>\n!;
4141         if (defined $action &&
4142             $action eq 'blame_incremental') {
4143                 print qq!<script type="text/javascript">\n!.
4144                       qq!startBlame("!. href(action=>"blame_data", -replay=>1) .qq!",\n!.
4145                       qq!           "!. href() .qq!");\n!.
4146                       qq!</script>\n!;
4147         } else {
4148                 my ($jstimezone, $tz_cookie, $datetime_class) =
4149                         gitweb_get_feature('javascript-timezone');
4150
4151                 print qq!<script type="text/javascript">\n!.
4152                       qq!window.onload = function () {\n!;
4153                 if (gitweb_check_feature('javascript-actions')) {
4154                         print qq!       fixLinks();\n!;
4155                 }
4156                 if ($jstimezone && $tz_cookie && $datetime_class) {
4157                         print qq!       var tz_cookie = { name: '$tz_cookie', expires: 14, path: '/' };\n!. # in days
4158                               qq!       onloadTZSetup('$jstimezone', tz_cookie, '$datetime_class');\n!;
4159                 }
4160                 print qq!};\n!.
4161                       qq!</script>\n!;
4162         }
4163
4164         print "</body>\n" .
4165               "</html>";
4166 }
4167
4168 # die_error(<http_status_code>, <error_message>[, <detailed_html_description>])
4169 # Example: die_error(404, 'Hash not found')
4170 # By convention, use the following status codes (as defined in RFC 2616):
4171 # 400: Invalid or missing CGI parameters, or
4172 #      requested object exists but has wrong type.
4173 # 403: Requested feature (like "pickaxe" or "snapshot") not enabled on
4174 #      this server or project.
4175 # 404: Requested object/revision/project doesn't exist.
4176 # 500: The server isn't configured properly, or
4177 #      an internal error occurred (e.g. failed assertions caused by bugs), or
4178 #      an unknown error occurred (e.g. the git binary died unexpectedly).
4179 # 503: The server is currently unavailable (because it is overloaded,
4180 #      or down for maintenance).  Generally, this is a temporary state.
4181 sub die_error {
4182         my $status = shift || 500;
4183         my $error = esc_html(shift) || "Internal Server Error";
4184         my $extra = shift;
4185         my %opts = @_;
4186
4187         my %http_responses = (
4188                 400 => '400 Bad Request',
4189                 403 => '403 Forbidden',
4190                 404 => '404 Not Found',
4191                 500 => '500 Internal Server Error',
4192                 503 => '503 Service Unavailable',
4193         );
4194         git_header_html($http_responses{$status}, undef, %opts);
4195         print <<EOF;
4196 <div class="page_body">
4197 <br /><br />
4198 $status - $error
4199 <br />
4200 EOF
4201         if (defined $extra) {
4202                 print "<hr />\n" .
4203                       "$extra\n";
4204         }
4205         print "</div>\n";
4206
4207         git_footer_html();
4208         goto DONE_GITWEB
4209                 unless ($opts{'-error_handler'});
4210 }
4211
4212 ## ----------------------------------------------------------------------
4213 ## functions printing or outputting HTML: navigation
4214
4215 sub git_print_page_nav {
4216         my ($current, $suppress, $head, $treehead, $treebase, $extra) = @_;
4217         $extra = '' if !defined $extra; # pager or formats
4218
4219         my @navs = qw(summary shortlog log commit commitdiff tree);
4220         if ($suppress) {
4221                 @navs = grep { $_ ne $suppress } @navs;
4222         }
4223
4224         my %arg = map { $_ => {action=>$_} } @navs;
4225         if (defined $head) {
4226                 for (qw(commit commitdiff)) {
4227                         $arg{$_}{'hash'} = $head;
4228                 }
4229                 if ($current =~ m/^(tree | log | shortlog | commit | commitdiff | search)$/x) {
4230                         for (qw(shortlog log)) {
4231                                 $arg{$_}{'hash'} = $head;
4232                         }
4233                 }
4234         }
4235
4236         $arg{'tree'}{'hash'} = $treehead if defined $treehead;
4237         $arg{'tree'}{'hash_base'} = $treebase if defined $treebase;
4238
4239         my @actions = gitweb_get_feature('actions');
4240         my %repl = (
4241                 '%' => '%',
4242                 'n' => $project,         # project name
4243                 'f' => $git_dir,         # project path within filesystem
4244                 'h' => $treehead || '',  # current hash ('h' parameter)
4245                 'b' => $treebase || '',  # hash base ('hb' parameter)
4246         );
4247         while (@actions) {
4248                 my ($label, $link, $pos) = splice(@actions,0,3);
4249                 # insert
4250                 @navs = map { $_ eq $pos ? ($_, $label) : $_ } @navs;
4251                 # munch munch
4252                 $link =~ s/%([%nfhb])/$repl{$1}/g;
4253                 $arg{$label}{'_href'} = $link;
4254         }
4255
4256         print "<div class=\"page_nav\">\n" .
4257                 (join " | ",
4258                  map { $_ eq $current ?
4259                        $_ : $cgi->a({-href => ($arg{$_}{_href} ? $arg{$_}{_href} : href(%{$arg{$_}}))}, "$_")
4260                  } @navs);
4261         print "<br/>\n$extra<br/>\n" .
4262               "</div>\n";
4263 }
4264
4265 # returns a submenu for the nagivation of the refs views (tags, heads,
4266 # remotes) with the current view disabled and the remotes view only
4267 # available if the feature is enabled
4268 sub format_ref_views {
4269         my ($current) = @_;
4270         my @ref_views = qw{tags heads};
4271         push @ref_views, 'remotes' if gitweb_check_feature('remote_heads');
4272         return join " | ", map {
4273                 $_ eq $current ? $_ :
4274                 $cgi->a({-href => href(action=>$_)}, $_)
4275         } @ref_views
4276 }
4277
4278 sub format_paging_nav {
4279         my ($action, $page, $has_next_link) = @_;
4280         my $paging_nav;
4281
4282
4283         if ($page > 0) {
4284                 $paging_nav .=
4285                         $cgi->a({-href => href(-replay=>1, page=>undef)}, "first") .
4286                         " &sdot; " .
4287                         $cgi->a({-href => href(-replay=>1, page=>$page-1),
4288                                  -accesskey => "p", -title => "Alt-p"}, "prev");
4289         } else {
4290                 $paging_nav .= "first &sdot; prev";
4291         }
4292
4293         if ($has_next_link) {
4294                 $paging_nav .= " &sdot; " .
4295                         $cgi->a({-href => href(-replay=>1, page=>$page+1),
4296                                  -accesskey => "n", -title => "Alt-n"}, "next");
4297         } else {
4298                 $paging_nav .= " &sdot; next";
4299         }
4300
4301         return $paging_nav;
4302 }
4303
4304 ## ......................................................................
4305 ## functions printing or outputting HTML: div
4306
4307 sub git_print_header_div {
4308         my ($action, $title, $hash, $hash_base) = @_;
4309         my %args = ();
4310
4311         $args{'action'} = $action;
4312         $args{'hash'} = $hash if $hash;
4313         $args{'hash_base'} = $hash_base if $hash_base;
4314
4315         print "<div class=\"header\">\n" .
4316               $cgi->a({-href => href(%args), -class => "title"},
4317               $title ? $title : $action) .
4318               "\n</div>\n";
4319 }
4320
4321 sub format_repo_url {
4322         my ($name, $url) = @_;
4323         return "<tr class=\"metadata_url\"><td>$name</td><td>$url</td></tr>\n";
4324 }
4325
4326 # Group output by placing it in a DIV element and adding a header.
4327 # Options for start_div() can be provided by passing a hash reference as the
4328 # first parameter to the function.
4329 # Options to git_print_header_div() can be provided by passing an array
4330 # reference. This must follow the options to start_div if they are present.
4331 # The content can be a scalar, which is output as-is, a scalar reference, which
4332 # is output after html escaping, an IO handle passed either as *handle or
4333 # *handle{IO}, or a function reference. In the latter case all following
4334 # parameters will be taken as argument to the content function call.
4335 sub git_print_section {
4336         my ($div_args, $header_args, $content);
4337         my $arg = shift;
4338         if (ref($arg) eq 'HASH') {
4339                 $div_args = $arg;
4340                 $arg = shift;
4341         }
4342         if (ref($arg) eq 'ARRAY') {
4343                 $header_args = $arg;
4344                 $arg = shift;
4345         }
4346         $content = $arg;
4347
4348         print $cgi->start_div($div_args);
4349         git_print_header_div(@$header_args);
4350
4351         if (ref($content) eq 'CODE') {
4352                 $content->(@_);
4353         } elsif (ref($content) eq 'SCALAR') {
4354                 print esc_html($$content);
4355         } elsif (ref($content) eq 'GLOB' or ref($content) eq 'IO::Handle') {
4356                 print <$content>;
4357         } elsif (!ref($content) && defined($content)) {
4358                 print $content;
4359         }
4360
4361         print $cgi->end_div;
4362 }
4363
4364 sub format_timestamp_html {
4365         my $date = shift;
4366         my $strtime = $date->{'rfc2822'};
4367
4368         my (undef, undef, $datetime_class) =
4369                 gitweb_get_feature('javascript-timezone');
4370         if ($datetime_class) {
4371                 $strtime = qq!<span class="$datetime_class">$strtime</span>!;
4372         }
4373
4374         my $localtime_format = '(%02d:%02d %s)';
4375         if ($date->{'hour_local'} < 6) {
4376                 $localtime_format = '(<span class="atnight">%02d:%02d</span> %s)';
4377         }
4378         $strtime .= ' ' .
4379                     sprintf($localtime_format,
4380                             $date->{'hour_local'}, $date->{'minute_local'}, $date->{'tz_local'});
4381
4382         return $strtime;
4383 }
4384
4385 # Outputs the author name and date in long form
4386 sub git_print_authorship {
4387         my $co = shift;
4388         my %opts = @_;
4389         my $tag = $opts{-tag} || 'div';
4390         my $author = $co->{'author_name'};
4391
4392         my %ad = parse_date($co->{'author_epoch'}, $co->{'author_tz'});
4393         print "<$tag class=\"author_date\">" .
4394               format_search_author($author, "author", esc_html($author)) .
4395               " [".format_timestamp_html(\%ad)."]".
4396               git_get_avatar($co->{'author_email'}, -pad_before => 1) .
4397               "</$tag>\n";
4398 }
4399
4400 # Outputs table rows containing the full author or committer information,
4401 # in the format expected for 'commit' view (& similar).
4402 # Parameters are a commit hash reference, followed by the list of people
4403 # to output information for. If the list is empty it defaults to both
4404 # author and committer.
4405 sub git_print_authorship_rows {
4406         my $co = shift;
4407         # too bad we can't use @people = @_ || ('author', 'committer')
4408         my @people = @_;
4409         @people = ('author', 'committer') unless @people;
4410         foreach my $who (@people) {
4411                 my %wd = parse_date($co->{"${who}_epoch"}, $co->{"${who}_tz"});
4412                 print "<tr><td>$who</td><td>" .
4413                       format_search_author($co->{"${who}_name"}, $who,
4414                                            esc_html($co->{"${who}_name"})) . " " .
4415                       format_search_author($co->{"${who}_email"}, $who,
4416                                            esc_html("<" . $co->{"${who}_email"} . ">")) .
4417                       "</td><td rowspan=\"2\">" .
4418                       git_get_avatar($co->{"${who}_email"}, -size => 'double') .
4419                       "</td></tr>\n" .
4420                       "<tr>" .
4421                       "<td></td><td>" .
4422                       format_timestamp_html(\%wd) .
4423                       "</td>" .
4424                       "</tr>\n";
4425         }
4426 }
4427
4428 sub git_print_page_path {
4429         my $name = shift;
4430         my $type = shift;
4431         my $hb = shift;
4432
4433
4434         print "<div class=\"page_path\">";
4435         print $cgi->a({-href => href(action=>"tree", hash_base=>$hb),
4436                       -title => 'tree root'}, to_utf8("[$project]"));
4437         print " / ";
4438         if (defined $name) {
4439                 my @dirname = split '/', $name;
4440                 my $basename = pop @dirname;
4441                 my $fullname = '';
4442
4443                 foreach my $dir (@dirname) {
4444                         $fullname .= ($fullname ? '/' : '') . $dir;
4445                         print $cgi->a({-href => href(action=>"tree", file_name=>$fullname,
4446                                                      hash_base=>$hb),
4447                                       -title => $fullname}, esc_path($dir));
4448                         print " / ";
4449                 }
4450                 if (defined $type && $type eq 'blob') {
4451                         print $cgi->a({-href => href(action=>"blob_plain", file_name=>$file_name,
4452                                                      hash_base=>$hb),
4453                                       -title => $name}, esc_path($basename));
4454                 } elsif (defined $type && $type eq 'tree') {
4455                         print $cgi->a({-href => href(action=>"tree", file_name=>$file_name,
4456                                                      hash_base=>$hb),
4457                                       -title => $name}, esc_path($basename));
4458                         print " / ";
4459                 } else {
4460                         print esc_path($basename);
4461                 }
4462         }
4463         print "<br/></div>\n";
4464 }
4465
4466 sub git_print_log {
4467         my $log = shift;
4468         my %opts = @_;
4469
4470         if ($opts{'-remove_title'}) {
4471                 # remove title, i.e. first line of log
4472                 shift @$log;
4473         }
4474         # remove leading empty lines
4475         while (defined $log->[0] && $log->[0] eq "") {
4476                 shift @$log;
4477         }
4478
4479         # print log
4480         my $signoff = 0;
4481         my $empty = 0;
4482         foreach my $line (@$log) {
4483                 if ($line =~ m/^ *(signed[ \-]off[ \-]by[ :]|acked[ \-]by[ :]|cc[ :])/i) {
4484                         $signoff = 1;
4485                         $empty = 0;
4486                         if (! $opts{'-remove_signoff'}) {
4487                                 print "<span class=\"signoff\">" . esc_html($line) . "</span><br/>\n";
4488                                 next;
4489                         } else {
4490                                 # remove signoff lines
4491                                 next;
4492                         }
4493                 } else {
4494                         $signoff = 0;
4495                 }
4496
4497                 # print only one empty line
4498                 # do not print empty line after signoff
4499                 if ($line eq "") {
4500                         next if ($empty || $signoff);
4501                         $empty = 1;
4502                 } else {
4503                         $empty = 0;
4504                 }
4505
4506                 print format_log_line_html($line) . "<br/>\n";
4507         }
4508
4509         if ($opts{'-final_empty_line'}) {
4510                 # end with single empty line
4511                 print "<br/>\n" unless $empty;
4512         }
4513 }
4514
4515 # return link target (what link points to)
4516 sub git_get_link_target {
4517         my $hash = shift;
4518         my $link_target;
4519
4520         # read link
4521         open my $fd, "-|", git_cmd(), "cat-file", "blob", $hash
4522                 or return;
4523         {
4524                 local $/ = undef;
4525                 $link_target = <$fd>;
4526         }
4527         close $fd
4528                 or return;
4529
4530         return $link_target;
4531 }
4532
4533 # given link target, and the directory (basedir) the link is in,
4534 # return target of link relative to top directory (top tree);
4535 # return undef if it is not possible (including absolute links).
4536 sub normalize_link_target {
4537         my ($link_target, $basedir) = @_;
4538
4539         # absolute symlinks (beginning with '/') cannot be normalized
4540         return if (substr($link_target, 0, 1) eq '/');
4541
4542         # normalize link target to path from top (root) tree (dir)
4543         my $path;
4544         if ($basedir) {
4545                 $path = $basedir . '/' . $link_target;
4546         } else {
4547                 # we are in top (root) tree (dir)
4548                 $path = $link_target;
4549         }
4550
4551         # remove //, /./, and /../
4552         my @path_parts;
4553         foreach my $part (split('/', $path)) {
4554                 # discard '.' and ''
4555                 next if (!$part || $part eq '.');
4556                 # handle '..'
4557                 if ($part eq '..') {
4558                         if (@path_parts) {
4559                                 pop @path_parts;
4560                         } else {
4561                                 # link leads outside repository (outside top dir)
4562                                 return;
4563                         }
4564                 } else {
4565                         push @path_parts, $part;
4566                 }
4567         }
4568         $path = join('/', @path_parts);
4569
4570         return $path;
4571 }
4572
4573 # print tree entry (row of git_tree), but without encompassing <tr> element
4574 sub git_print_tree_entry {
4575         my ($t, $basedir, $hash_base, $have_blame) = @_;
4576
4577         my %base_key = ();
4578         $base_key{'hash_base'} = $hash_base if defined $hash_base;
4579
4580         # The format of a table row is: mode list link.  Where mode is
4581         # the mode of the entry, list is the name of the entry, an href,
4582         # and link is the action links of the entry.
4583
4584         print "<td class=\"mode\">" . mode_str($t->{'mode'}) . "</td>\n";
4585         if (exists $t->{'size'}) {
4586                 print "<td class=\"size\">$t->{'size'}</td>\n";
4587         }
4588         if ($t->{'type'} eq "blob") {
4589                 print "<td class=\"list\">" .
4590                         $cgi->a({-href => href(action=>"blob", hash=>$t->{'hash'},
4591                                                file_name=>"$basedir$t->{'name'}", %base_key),
4592                                 -class => "list"}, esc_path($t->{'name'}));
4593                 if (S_ISLNK(oct $t->{'mode'})) {
4594                         my $link_target = git_get_link_target($t->{'hash'});
4595                         if ($link_target) {
4596                                 my $norm_target = normalize_link_target($link_target, $basedir);
4597                                 if (defined $norm_target) {
4598                                         print " -> " .
4599                                               $cgi->a({-href => href(action=>"object", hash_base=>$hash_base,
4600                                                                      file_name=>$norm_target),
4601                                                        -title => $norm_target}, esc_path($link_target));
4602                                 } else {
4603                                         print " -> " . esc_path($link_target);
4604                                 }
4605                         }
4606                 }
4607                 print "</td>\n";
4608                 print "<td class=\"link\">";
4609                 print $cgi->a({-href => href(action=>"blob", hash=>$t->{'hash'},
4610                                              file_name=>"$basedir$t->{'name'}", %base_key)},
4611                               "blob");
4612                 if ($have_blame) {
4613                         print " | " .
4614                               $cgi->a({-href => href(action=>"blame", hash=>$t->{'hash'},
4615                                                      file_name=>"$basedir$t->{'name'}", %base_key)},
4616                                       "blame");
4617                 }
4618                 if (defined $hash_base) {
4619                         print " | " .
4620                               $cgi->a({-href => href(action=>"history", hash_base=>$hash_base,
4621                                                      hash=>$t->{'hash'}, file_name=>"$basedir$t->{'name'}")},
4622                                       "history");
4623                 }
4624                 print " | " .
4625                         $cgi->a({-href => href(action=>"blob_plain", hash_base=>$hash_base,
4626                                                file_name=>"$basedir$t->{'name'}")},
4627                                 "raw");
4628                 print "</td>\n";
4629
4630         } elsif ($t->{'type'} eq "tree") {
4631                 print "<td class=\"list\">";
4632                 print $cgi->a({-href => href(action=>"tree", hash=>$t->{'hash'},
4633                                              file_name=>"$basedir$t->{'name'}",
4634                                              %base_key)},
4635                               esc_path($t->{'name'}));
4636                 print "</td>\n";
4637                 print "<td class=\"link\">";
4638                 print $cgi->a({-href => href(action=>"tree", hash=>$t->{'hash'},
4639                                              file_name=>"$basedir$t->{'name'}",
4640                                              %base_key)},
4641                               "tree");
4642                 if (defined $hash_base) {
4643                         print " | " .
4644                               $cgi->a({-href => href(action=>"history", hash_base=>$hash_base,
4645                                                      file_name=>"$basedir$t->{'name'}")},
4646                                       "history");
4647                 }
4648                 print "</td>\n";
4649         } else {
4650                 # unknown object: we can only present history for it
4651                 # (this includes 'commit' object, i.e. submodule support)
4652                 print "<td class=\"list\">" .
4653                       esc_path($t->{'name'}) .
4654                       "</td>\n";
4655                 print "<td class=\"link\">";
4656                 if (defined $hash_base) {
4657                         print $cgi->a({-href => href(action=>"history",
4658                                                      hash_base=>$hash_base,
4659                                                      file_name=>"$basedir$t->{'name'}")},
4660                                       "history");
4661                 }
4662                 print "</td>\n";
4663         }
4664 }
4665
4666 ## ......................................................................
4667 ## functions printing large fragments of HTML
4668
4669 # get pre-image filenames for merge (combined) diff
4670 sub fill_from_file_info {
4671         my ($diff, @parents) = @_;
4672
4673         $diff->{'from_file'} = [ ];
4674         $diff->{'from_file'}[$diff->{'nparents'} - 1] = undef;
4675         for (my $i = 0; $i < $diff->{'nparents'}; $i++) {
4676                 if ($diff->{'status'}[$i] eq 'R' ||
4677                     $diff->{'status'}[$i] eq 'C') {
4678                         $diff->{'from_file'}[$i] =
4679                                 git_get_path_by_hash($parents[$i], $diff->{'from_id'}[$i]);
4680                 }
4681         }
4682
4683         return $diff;
4684 }
4685
4686 # is current raw difftree line of file deletion
4687 sub is_deleted {
4688         my $diffinfo = shift;
4689
4690         return $diffinfo->{'to_id'} eq ('0' x 40);
4691 }
4692
4693 # does patch correspond to [previous] difftree raw line
4694 # $diffinfo  - hashref of parsed raw diff format
4695 # $patchinfo - hashref of parsed patch diff format
4696 #              (the same keys as in $diffinfo)
4697 sub is_patch_split {
4698         my ($diffinfo, $patchinfo) = @_;
4699
4700         return defined $diffinfo && defined $patchinfo
4701                 && $diffinfo->{'to_file'} eq $patchinfo->{'to_file'};
4702 }
4703
4704
4705 sub git_difftree_body {
4706         my ($difftree, $hash, @parents) = @_;
4707         my ($parent) = $parents[0];
4708         my $have_blame = gitweb_check_feature('blame');
4709         print "<div class=\"list_head\">\n";
4710         if ($#{$difftree} > 10) {
4711                 print(($#{$difftree} + 1) . " files changed:\n");
4712         }
4713         print "</div>\n";
4714
4715         print "<table class=\"" .
4716               (@parents > 1 ? "combined " : "") .
4717               "diff_tree\">\n";
4718
4719         # header only for combined diff in 'commitdiff' view
4720         my $has_header = @$difftree && @parents > 1 && $action eq 'commitdiff';
4721         if ($has_header) {
4722                 # table header
4723                 print "<thead><tr>\n" .
4724                        "<th></th><th></th>\n"; # filename, patchN link
4725                 for (my $i = 0; $i < @parents; $i++) {
4726                         my $par = $parents[$i];
4727                         print "<th>" .
4728                               $cgi->a({-href => href(action=>"commitdiff",
4729                                                      hash=>$hash, hash_parent=>$par),
4730                                        -title => 'commitdiff to parent number ' .
4731                                                   ($i+1) . ': ' . substr($par,0,7)},
4732                                       $i+1) .
4733                               "&nbsp;</th>\n";
4734                 }
4735                 print "</tr></thead>\n<tbody>\n";
4736         }
4737
4738         my $alternate = 1;
4739         my $patchno = 0;
4740         foreach my $line (@{$difftree}) {
4741                 my $diff = parsed_difftree_line($line);
4742
4743                 if ($alternate) {
4744                         print "<tr class=\"dark\">\n";
4745                 } else {
4746                         print "<tr class=\"light\">\n";
4747                 }
4748                 $alternate ^= 1;
4749
4750                 if (exists $diff->{'nparents'}) { # combined diff
4751
4752                         fill_from_file_info($diff, @parents)
4753                                 unless exists $diff->{'from_file'};
4754
4755                         if (!is_deleted($diff)) {
4756                                 # file exists in the result (child) commit
4757                                 print "<td>" .
4758                                       $cgi->a({-href => href(action=>"blob", hash=>$diff->{'to_id'},
4759                                                              file_name=>$diff->{'to_file'},
4760                                                              hash_base=>$hash),
4761                                               -class => "list"}, esc_path($diff->{'to_file'})) .
4762                                       "</td>\n";
4763                         } else {
4764                                 print "<td>" .
4765                                       esc_path($diff->{'to_file'}) .
4766                                       "</td>\n";
4767                         }
4768
4769                         if ($action eq 'commitdiff') {
4770                                 # link to patch
4771                                 $patchno++;
4772                                 print "<td class=\"link\">" .
4773                                       $cgi->a({-href => href(-anchor=>"patch$patchno")},
4774                                               "patch") .
4775                                       " | " .
4776                                       "</td>\n";
4777                         }
4778
4779                         my $has_history = 0;
4780                         my $not_deleted = 0;
4781                         for (my $i = 0; $i < $diff->{'nparents'}; $i++) {
4782                                 my $hash_parent = $parents[$i];
4783                                 my $from_hash = $diff->{'from_id'}[$i];
4784                                 my $from_path = $diff->{'from_file'}[$i];
4785                                 my $status = $diff->{'status'}[$i];
4786
4787                                 $has_history ||= ($status ne 'A');
4788                                 $not_deleted ||= ($status ne 'D');
4789
4790                                 if ($status eq 'A') {
4791                                         print "<td  class=\"link\" align=\"right\"> | </td>\n";
4792                                 } elsif ($status eq 'D') {
4793                                         print "<td class=\"link\">" .
4794                                               $cgi->a({-href => href(action=>"blob",
4795                                                                      hash_base=>$hash,
4796                                                                      hash=>$from_hash,
4797                                                                      file_name=>$from_path)},
4798                                                       "blob" . ($i+1)) .
4799                                               " | </td>\n";
4800                                 } else {
4801                                         if ($diff->{'to_id'} eq $from_hash) {
4802                                                 print "<td class=\"link nochange\">";
4803                                         } else {
4804                                                 print "<td class=\"link\">";
4805                                         }
4806                                         print $cgi->a({-href => href(action=>"blobdiff",
4807                                                                      hash=>$diff->{'to_id'},
4808                                                                      hash_parent=>$from_hash,
4809                                                                      hash_base=>$hash,
4810                                                                      hash_parent_base=>$hash_parent,
4811                                                                      file_name=>$diff->{'to_file'},
4812                                                                      file_parent=>$from_path)},
4813                                                       "diff" . ($i+1)) .
4814                                               " | </td>\n";
4815                                 }
4816                         }
4817
4818                         print "<td class=\"link\">";
4819                         if ($not_deleted) {
4820                                 print $cgi->a({-href => href(action=>"blob",
4821                                                              hash=>$diff->{'to_id'},
4822                                                              file_name=>$diff->{'to_file'},
4823                                                              hash_base=>$hash)},
4824                                               "blob");
4825                                 print " | " if ($has_history);
4826                         }
4827                         if ($has_history) {
4828                                 print $cgi->a({-href => href(action=>"history",
4829                                                              file_name=>$diff->{'to_file'},
4830                                                              hash_base=>$hash)},
4831                                               "history");
4832                         }
4833                         print "</td>\n";
4834
4835                         print "</tr>\n";
4836                         next; # instead of 'else' clause, to avoid extra indent
4837                 }
4838                 # else ordinary diff
4839
4840                 my ($to_mode_oct, $to_mode_str, $to_file_type);
4841                 my ($from_mode_oct, $from_mode_str, $from_file_type);
4842                 if ($diff->{'to_mode'} ne ('0' x 6)) {
4843                         $to_mode_oct = oct $diff->{'to_mode'};
4844                         if (S_ISREG($to_mode_oct)) { # only for regular file
4845                                 $to_mode_str = sprintf("%04o", $to_mode_oct & 0777); # permission bits
4846                         }
4847                         $to_file_type = file_type($diff->{'to_mode'});
4848                 }
4849                 if ($diff->{'from_mode'} ne ('0' x 6)) {
4850                         $from_mode_oct = oct $diff->{'from_mode'};
4851                         if (S_ISREG($from_mode_oct)) { # only for regular file
4852                                 $from_mode_str = sprintf("%04o", $from_mode_oct & 0777); # permission bits
4853                         }
4854                         $from_file_type = file_type($diff->{'from_mode'});
4855                 }
4856
4857                 if ($diff->{'status'} eq "A") { # created
4858                         my $mode_chng = "<span class=\"file_status new\">[new $to_file_type";
4859                         $mode_chng   .= " with mode: $to_mode_str" if $to_mode_str;
4860                         $mode_chng   .= "]</span>";
4861                         print "<td>";
4862                         print $cgi->a({-href => href(action=>"blob", hash=>$diff->{'to_id'},
4863                                                      hash_base=>$hash, file_name=>$diff->{'file'}),
4864                                       -class => "list"}, esc_path($diff->{'file'}));
4865                         print "</td>\n";
4866                         print "<td>$mode_chng</td>\n";
4867                         print "<td class=\"link\">";
4868                         if ($action eq 'commitdiff') {
4869                                 # link to patch
4870                                 $patchno++;
4871                                 print $cgi->a({-href => href(-anchor=>"patch$patchno")},
4872                                               "patch") .
4873                                       " | ";
4874                         }
4875                         print $cgi->a({-href => href(action=>"blob", hash=>$diff->{'to_id'},
4876                                                      hash_base=>$hash, file_name=>$diff->{'file'})},
4877                                       "blob");
4878                         print "</td>\n";
4879
4880                 } elsif ($diff->{'status'} eq "D") { # deleted
4881                         my $mode_chng = "<span class=\"file_status deleted\">[deleted $from_file_type]</span>";
4882                         print "<td>";
4883                         print $cgi->a({-href => href(action=>"blob", hash=>$diff->{'from_id'},
4884                                                      hash_base=>$parent, file_name=>$diff->{'file'}),
4885                                        -class => "list"}, esc_path($diff->{'file'}));
4886                         print "</td>\n";
4887                         print "<td>$mode_chng</td>\n";
4888                         print "<td class=\"link\">";
4889                         if ($action eq 'commitdiff') {
4890                                 # link to patch
4891                                 $patchno++;
4892                                 print $cgi->a({-href => href(-anchor=>"patch$patchno")},
4893                                               "patch") .
4894                                       " | ";
4895                         }
4896                         print $cgi->a({-href => href(action=>"blob", hash=>$diff->{'from_id'},
4897                                                      hash_base=>$parent, file_name=>$diff->{'file'})},
4898                                       "blob") . " | ";
4899                         if ($have_blame) {
4900                                 print $cgi->a({-href => href(action=>"blame", hash_base=>$parent,
4901                                                              file_name=>$diff->{'file'})},
4902                                               "blame") . " | ";
4903                         }
4904                         print $cgi->a({-href => href(action=>"history", hash_base=>$parent,
4905                                                      file_name=>$diff->{'file'})},
4906                                       "history");
4907                         print "</td>\n";
4908
4909                 } elsif ($diff->{'status'} eq "M" || $diff->{'status'} eq "T") { # modified, or type changed
4910                         my $mode_chnge = "";
4911                         if ($diff->{'from_mode'} != $diff->{'to_mode'}) {
4912                                 $mode_chnge = "<span class=\"file_status mode_chnge\">[changed";
4913                                 if ($from_file_type ne $to_file_type) {
4914                                         $mode_chnge .= " from $from_file_type to $to_file_type";
4915                                 }
4916                                 if (($from_mode_oct & 0777) != ($to_mode_oct & 0777)) {
4917                                         if ($from_mode_str && $to_mode_str) {
4918                                                 $mode_chnge .= " mode: $from_mode_str->$to_mode_str";
4919                                         } elsif ($to_mode_str) {
4920                                                 $mode_chnge .= " mode: $to_mode_str";
4921                                         }
4922                                 }
4923                                 $mode_chnge .= "]</span>\n";
4924                         }
4925                         print "<td>";
4926                         print $cgi->a({-href => href(action=>"blob", hash=>$diff->{'to_id'},
4927                                                      hash_base=>$hash, file_name=>$diff->{'file'}),
4928                                       -class => "list"}, esc_path($diff->{'file'}));
4929                         print "</td>\n";
4930                         print "<td>$mode_chnge</td>\n";
4931                         print "<td class=\"link\">";
4932                         if ($action eq 'commitdiff') {
4933                                 # link to patch
4934                                 $patchno++;
4935                                 print $cgi->a({-href => href(-anchor=>"patch$patchno")},
4936                                               "patch") .
4937                                       " | ";
4938                         } elsif ($diff->{'to_id'} ne $diff->{'from_id'}) {
4939                                 # "commit" view and modified file (not onlu mode changed)
4940                                 print $cgi->a({-href => href(action=>"blobdiff",
4941                                                              hash=>$diff->{'to_id'}, hash_parent=>$diff->{'from_id'},
4942                                                              hash_base=>$hash, hash_parent_base=>$parent,
4943                                                              file_name=>$diff->{'file'})},
4944                                               "diff") .
4945                                       " | ";
4946                         }
4947                         print $cgi->a({-href => href(action=>"blob", hash=>$diff->{'to_id'},
4948                                                      hash_base=>$hash, file_name=>$diff->{'file'})},
4949                                        "blob") . " | ";
4950                         if ($have_blame) {
4951                                 print $cgi->a({-href => href(action=>"blame", hash_base=>$hash,
4952                                                              file_name=>$diff->{'file'})},
4953                                               "blame") . " | ";
4954                         }
4955                         print $cgi->a({-href => href(action=>"history", hash_base=>$hash,
4956                                                      file_name=>$diff->{'file'})},
4957                                       "history");
4958                         print "</td>\n";
4959
4960                 } elsif ($diff->{'status'} eq "R" || $diff->{'status'} eq "C") { # renamed or copied
4961                         my %status_name = ('R' => 'moved', 'C' => 'copied');
4962                         my $nstatus = $status_name{$diff->{'status'}};
4963                         my $mode_chng = "";
4964                         if ($diff->{'from_mode'} != $diff->{'to_mode'}) {
4965                                 # mode also for directories, so we cannot use $to_mode_str
4966                                 $mode_chng = sprintf(", mode: %04o", $to_mode_oct & 0777);
4967                         }
4968                         print "<td>" .
4969                               $cgi->a({-href => href(action=>"blob", hash_base=>$hash,
4970                                                      hash=>$diff->{'to_id'}, file_name=>$diff->{'to_file'}),
4971                                       -class => "list"}, esc_path($diff->{'to_file'})) . "</td>\n" .
4972                               "<td><span class=\"file_status $nstatus\">[$nstatus from " .
4973                               $cgi->a({-href => href(action=>"blob", hash_base=>$parent,
4974                                                      hash=>$diff->{'from_id'}, file_name=>$diff->{'from_file'}),
4975                                       -class => "list"}, esc_path($diff->{'from_file'})) .
4976                               " with " . (int $diff->{'similarity'}) . "% similarity$mode_chng]</span></td>\n" .
4977                               "<td class=\"link\">";
4978                         if ($action eq 'commitdiff') {
4979                                 # link to patch
4980                                 $patchno++;
4981                                 print $cgi->a({-href => href(-anchor=>"patch$patchno")},
4982                                               "patch") .
4983                                       " | ";
4984                         } elsif ($diff->{'to_id'} ne $diff->{'from_id'}) {
4985                                 # "commit" view and modified file (not only pure rename or copy)
4986                                 print $cgi->a({-href => href(action=>"blobdiff",
4987                                                              hash=>$diff->{'to_id'}, hash_parent=>$diff->{'from_id'},
4988                                                              hash_base=>$hash, hash_parent_base=>$parent,
4989                                                              file_name=>$diff->{'to_file'}, file_parent=>$diff->{'from_file'})},
4990                                               "diff") .
4991                                       " | ";
4992                         }
4993                         print $cgi->a({-href => href(action=>"blob", hash=>$diff->{'to_id'},
4994                                                      hash_base=>$parent, file_name=>$diff->{'to_file'})},
4995                                       "blob") . " | ";
4996                         if ($have_blame) {
4997                                 print $cgi->a({-href => href(action=>"blame", hash_base=>$hash,
4998                                                              file_name=>$diff->{'to_file'})},
4999                                               "blame") . " | ";
5000                         }
5001                         print $cgi->a({-href => href(action=>"history", hash_base=>$hash,
5002                                                     file_name=>$diff->{'to_file'})},
5003                                       "history");
5004                         print "</td>\n";
5005
5006                 } # we should not encounter Unmerged (U) or Unknown (X) status
5007                 print "</tr>\n";
5008         }
5009         print "</tbody>" if $has_header;
5010         print "</table>\n";
5011 }
5012
5013 # Print context lines and then rem/add lines in a side-by-side manner.
5014 sub print_sidebyside_diff_lines {
5015         my ($ctx, $rem, $add) = @_;
5016
5017         # print context block before add/rem block
5018         if (@$ctx) {
5019                 print join '',
5020                         '<div class="chunk_block ctx">',
5021                                 '<div class="old">',
5022                                 @$ctx,
5023                                 '</div>',
5024                                 '<div class="new">',
5025                                 @$ctx,
5026                                 '</div>',
5027                         '</div>';
5028         }
5029
5030         if (!@$add) {
5031                 # pure removal
5032                 print join '',
5033                         '<div class="chunk_block rem">',
5034                                 '<div class="old">',
5035                                 @$rem,
5036                                 '</div>',
5037                         '</div>';
5038         } elsif (!@$rem) {
5039                 # pure addition
5040                 print join '',
5041                         '<div class="chunk_block add">',
5042                                 '<div class="new">',
5043                                 @$add,
5044                                 '</div>',
5045                         '</div>';
5046         } else {
5047                 print join '',
5048                         '<div class="chunk_block chg">',
5049                                 '<div class="old">',
5050                                 @$rem,
5051                                 '</div>',
5052                                 '<div class="new">',
5053                                 @$add,
5054                                 '</div>',
5055                         '</div>';
5056         }
5057 }
5058
5059 # Print context lines and then rem/add lines in inline manner.
5060 sub print_inline_diff_lines {
5061         my ($ctx, $rem, $add) = @_;
5062
5063         print @$ctx, @$rem, @$add;
5064 }
5065
5066 # Format removed and added line, mark changed part and HTML-format them.
5067 # Implementation is based on contrib/diff-highlight
5068 sub format_rem_add_lines_pair {
5069         my ($rem, $add) = @_;
5070
5071         # We need to untabify lines before split()'ing them;
5072         # otherwise offsets would be invalid.
5073         chomp $rem;
5074         chomp $add;
5075         $rem = untabify($rem);
5076         $add = untabify($add);
5077
5078         my @rem = split(//, $rem);
5079         my @add = split(//, $add);
5080         my ($esc_rem, $esc_add);
5081         # Ignore +/- character, thus $prefix_len is set to 1.
5082         my ($prefix_len, $suffix_len) = (1, 0);
5083         my ($prefix_has_nonspace, $suffix_has_nonspace);
5084
5085         my $shorter = (@rem < @add) ? @rem : @add;
5086         while ($prefix_len < $shorter) {
5087                 last if ($rem[$prefix_len] ne $add[$prefix_len]);
5088
5089                 $prefix_has_nonspace = 1 if ($rem[$prefix_len] !~ /\s/);
5090                 $prefix_len++;
5091         }
5092
5093         while ($prefix_len + $suffix_len < $shorter) {
5094                 last if ($rem[-1 - $suffix_len] ne $add[-1 - $suffix_len]);
5095
5096                 $suffix_has_nonspace = 1 if ($rem[-1 - $suffix_len] !~ /\s/);
5097                 $suffix_len++;
5098         }
5099
5100         # Mark lines that are different from each other, but have some common
5101         # part that isn't whitespace.  If lines are completely different, don't
5102         # mark them because that would make output unreadable, especially if
5103         # diff consists of multiple lines.
5104         if ($prefix_has_nonspace || $suffix_has_nonspace) {
5105                 $esc_rem = esc_html_hl_regions($rem, 'marked',
5106                         [$prefix_len, @rem - $suffix_len], -nbsp=>1);
5107                 $esc_add = esc_html_hl_regions($add, 'marked',
5108                         [$prefix_len, @add - $suffix_len], -nbsp=>1);
5109         } else {
5110                 $esc_rem = esc_html($rem, -nbsp=>1);
5111                 $esc_add = esc_html($add, -nbsp=>1);
5112         }
5113
5114         return format_diff_line(\$esc_rem, 'rem'),
5115                format_diff_line(\$esc_add, 'add');
5116 }
5117
5118 # HTML-format diff context, removed and added lines.
5119 sub format_ctx_rem_add_lines {
5120         my ($ctx, $rem, $add, $is_combined) = @_;
5121         my (@new_ctx, @new_rem, @new_add);
5122
5123         # Highlight if every removed line has a corresponding added line.
5124         # Combined diffs are not supported at this moment.
5125         if (!$is_combined && @$add > 0 && @$add == @$rem) {
5126                 for (my $i = 0; $i < @$add; $i++) {
5127                         my ($line_rem, $line_add) = format_rem_add_lines_pair(
5128                                 $rem->[$i], $add->[$i]);
5129                         push @new_rem, $line_rem;
5130                         push @new_add, $line_add;
5131                 }
5132         } else {
5133                 @new_rem = map { format_diff_line($_, 'rem') } @$rem;
5134                 @new_add = map { format_diff_line($_, 'add') } @$add;
5135         }
5136
5137         @new_ctx = map { format_diff_line($_, 'ctx') } @$ctx;
5138
5139         return (\@new_ctx, \@new_rem, \@new_add);
5140 }
5141
5142 # Print context lines and then rem/add lines.
5143 sub print_diff_lines {
5144         my ($ctx, $rem, $add, $diff_style, $is_combined) = @_;
5145
5146         ($ctx, $rem, $add) = format_ctx_rem_add_lines($ctx, $rem, $add,
5147                 $is_combined);
5148
5149         if ($diff_style eq 'sidebyside' && !$is_combined) {
5150                 print_sidebyside_diff_lines($ctx, $rem, $add);
5151         } else {
5152                 # default 'inline' style and unknown styles
5153                 print_inline_diff_lines($ctx, $rem, $add);
5154         }
5155 }
5156
5157 sub print_diff_chunk {
5158         my ($diff_style, $is_combined, $from, $to, @chunk) = @_;
5159         my (@ctx, @rem, @add);
5160
5161         # The class of the previous line.
5162         my $prev_class = '';
5163
5164         return unless @chunk;
5165
5166         # incomplete last line might be among removed or added lines,
5167         # or both, or among context lines: find which
5168         for (my $i = 1; $i < @chunk; $i++) {
5169                 if ($chunk[$i][0] eq 'incomplete') {
5170                         $chunk[$i][0] = $chunk[$i-1][0];
5171                 }
5172         }
5173
5174         # guardian
5175         push @chunk, ["", ""];
5176
5177         foreach my $line_info (@chunk) {
5178                 my ($class, $line) = @$line_info;
5179
5180                 # print chunk headers
5181                 if ($class && $class eq 'chunk_header') {
5182                         print format_diff_line($line, $class, $from, $to);
5183                         next;
5184                 }
5185
5186                 ## print from accumulator when have some add/rem lines or end
5187                 # of chunk (flush context lines), or when have add and rem
5188                 # lines and new block is reached (otherwise add/rem lines could
5189                 # be reordered)
5190                 if (!$class || ((@rem || @add) && $class eq 'ctx') ||
5191                     (@rem && @add && $class ne $prev_class)) {
5192                         print_diff_lines(\@ctx, \@rem, \@add,
5193                                          $diff_style, $is_combined);
5194                         @ctx = @rem = @add = ();
5195                 }
5196
5197                 ## adding lines to accumulator
5198                 # guardian value
5199                 last unless $line;
5200                 # rem, add or change
5201                 if ($class eq 'rem') {
5202                         push @rem, $line;
5203                 } elsif ($class eq 'add') {
5204                         push @add, $line;
5205                 }
5206                 # context line
5207                 if ($class eq 'ctx') {
5208                         push @ctx, $line;
5209                 }
5210
5211                 $prev_class = $class;
5212         }
5213 }
5214
5215 sub git_patchset_body {
5216         my ($fd, $diff_style, $difftree, $hash, @hash_parents) = @_;
5217         my ($hash_parent) = $hash_parents[0];
5218
5219         my $is_combined = (@hash_parents > 1);
5220         my $patch_idx = 0;
5221         my $patch_number = 0;
5222         my $patch_line;
5223         my $diffinfo;
5224         my $to_name;
5225         my (%from, %to);
5226         my @chunk; # for side-by-side diff
5227
5228         print "<div class=\"patchset\">\n";
5229
5230         # skip to first patch
5231         while ($patch_line = <$fd>) {
5232                 chomp $patch_line;
5233
5234                 last if ($patch_line =~ m/^diff /);
5235         }
5236
5237  PATCH:
5238         while ($patch_line) {
5239
5240                 # parse "git diff" header line
5241                 if ($patch_line =~ m/^diff --git (\"(?:[^\\\"]*(?:\\.[^\\\"]*)*)\"|[^ "]*) (.*)$/) {
5242                         # $1 is from_name, which we do not use
5243                         $to_name = unquote($2);
5244                         $to_name =~ s!^b/!!;
5245                 } elsif ($patch_line =~ m/^diff --(cc|combined) ("?.*"?)$/) {
5246                         # $1 is 'cc' or 'combined', which we do not use
5247                         $to_name = unquote($2);
5248                 } else {
5249                         $to_name = undef;
5250                 }
5251
5252                 # check if current patch belong to current raw line
5253                 # and parse raw git-diff line if needed
5254                 if (is_patch_split($diffinfo, { 'to_file' => $to_name })) {
5255                         # this is continuation of a split patch
5256                         print "<div class=\"patch cont\">\n";
5257                 } else {
5258                         # advance raw git-diff output if needed
5259                         $patch_idx++ if defined $diffinfo;
5260
5261                         # read and prepare patch information
5262                         $diffinfo = parsed_difftree_line($difftree->[$patch_idx]);
5263
5264                         # compact combined diff output can have some patches skipped
5265                         # find which patch (using pathname of result) we are at now;
5266                         if ($is_combined) {
5267                                 while ($to_name ne $diffinfo->{'to_file'}) {
5268                                         print "<div class=\"patch\" id=\"patch". ($patch_idx+1) ."\">\n" .
5269                                               format_diff_cc_simplified($diffinfo, @hash_parents) .
5270                                               "</div>\n";  # class="patch"
5271
5272                                         $patch_idx++;
5273                                         $patch_number++;
5274
5275                                         last if $patch_idx > $#$difftree;
5276                                         $diffinfo = parsed_difftree_line($difftree->[$patch_idx]);
5277                                 }
5278                         }
5279
5280                         # modifies %from, %to hashes
5281                         parse_from_to_diffinfo($diffinfo, \%from, \%to, @hash_parents);
5282
5283                         # this is first patch for raw difftree line with $patch_idx index
5284                         # we index @$difftree array from 0, but number patches from 1
5285                         print "<div class=\"patch\" id=\"patch". ($patch_idx+1) ."\">\n";
5286                 }
5287
5288                 # git diff header
5289                 #assert($patch_line =~ m/^diff /) if DEBUG;
5290                 #assert($patch_line !~ m!$/$!) if DEBUG; # is chomp-ed
5291                 $patch_number++;
5292                 # print "git diff" header
5293                 print format_git_diff_header_line($patch_line, $diffinfo,
5294                                                   \%from, \%to);
5295
5296                 # print extended diff header
5297                 print "<div class=\"diff extended_header\">\n";
5298         EXTENDED_HEADER:
5299                 while ($patch_line = <$fd>) {
5300                         chomp $patch_line;
5301
5302                         last EXTENDED_HEADER if ($patch_line =~ m/^--- |^diff /);
5303
5304                         print format_extended_diff_header_line($patch_line, $diffinfo,
5305                                                                \%from, \%to);
5306                 }
5307                 print "</div>\n"; # class="diff extended_header"
5308
5309                 # from-file/to-file diff header
5310                 if (! $patch_line) {
5311                         print "</div>\n"; # class="patch"
5312                         last PATCH;
5313                 }
5314                 next PATCH if ($patch_line =~ m/^diff /);
5315                 #assert($patch_line =~ m/^---/) if DEBUG;
5316
5317                 my $last_patch_line = $patch_line;
5318                 $patch_line = <$fd>;
5319                 chomp $patch_line;
5320                 #assert($patch_line =~ m/^\+\+\+/) if DEBUG;
5321
5322                 print format_diff_from_to_header($last_patch_line, $patch_line,
5323                                                  $diffinfo, \%from, \%to,
5324                                                  @hash_parents);
5325
5326                 # the patch itself
5327         LINE:
5328                 while ($patch_line = <$fd>) {
5329                         chomp $patch_line;
5330
5331                         next PATCH if ($patch_line =~ m/^diff /);
5332
5333                         my $class = diff_line_class($patch_line, \%from, \%to);
5334
5335                         if ($class eq 'chunk_header') {
5336                                 print_diff_chunk($diff_style, $is_combined, \%from, \%to, @chunk);
5337                                 @chunk = ();
5338                         }
5339
5340                         push @chunk, [ $class, $patch_line ];
5341                 }
5342
5343         } continue {
5344                 if (@chunk) {
5345                         print_diff_chunk($diff_style, $is_combined, \%from, \%to, @chunk);
5346                         @chunk = ();
5347                 }
5348                 print "</div>\n"; # class="patch"
5349         }
5350
5351         # for compact combined (--cc) format, with chunk and patch simplification
5352         # the patchset might be empty, but there might be unprocessed raw lines
5353         for (++$patch_idx if $patch_number > 0;
5354              $patch_idx < @$difftree;
5355              ++$patch_idx) {
5356                 # read and prepare patch information
5357                 $diffinfo = parsed_difftree_line($difftree->[$patch_idx]);
5358
5359                 # generate anchor for "patch" links in difftree / whatchanged part
5360                 print "<div class=\"patch\" id=\"patch". ($patch_idx+1) ."\">\n" .
5361                       format_diff_cc_simplified($diffinfo, @hash_parents) .
5362                       "</div>\n";  # class="patch"
5363
5364                 $patch_number++;
5365         }
5366
5367         if ($patch_number == 0) {
5368                 if (@hash_parents > 1) {
5369                         print "<div class=\"diff nodifferences\">Trivial merge</div>\n";
5370                 } else {
5371                         print "<div class=\"diff nodifferences\">No differences found</div>\n";
5372                 }
5373         }
5374
5375         print "</div>\n"; # class="patchset"
5376 }
5377
5378 # . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
5379
5380 sub git_project_search_form {
5381         my ($searchtext, $search_use_regexp) = @_;
5382
5383         my $limit = '';
5384         if ($project_filter) {
5385                 $limit = " in '$project_filter/'";
5386         }
5387
5388         print "<div class=\"projsearch\">\n";
5389         print $cgi->startform(-method => 'get', -action => $my_uri) .
5390               $cgi->hidden(-name => 'a', -value => 'project_list')  . "\n";
5391         print $cgi->hidden(-name => 'pf', -value => $project_filter). "\n"
5392                 if (defined $project_filter);
5393         print $cgi->textfield(-name => 's', -value => $searchtext,
5394                               -title => "Search project by name and description$limit",
5395                               -size => 60) . "\n" .
5396               "<span title=\"Extended regular expression\">" .
5397               $cgi->checkbox(-name => 'sr', -value => 1, -label => 're',
5398                              -checked => $search_use_regexp) .
5399               "</span>\n" .
5400               $cgi->submit(-name => 'btnS', -value => 'Search') .
5401               $cgi->end_form() . "\n" .
5402               $cgi->a({-href => href(project => undef, searchtext => undef,
5403                                      project_filter => $project_filter)},
5404                       esc_html("List all projects$limit")) . "<br />\n";
5405         print "</div>\n";
5406 }
5407
5408 # entry for given @keys needs filling if at least one of keys in list
5409 # is not present in %$project_info
5410 sub project_info_needs_filling {
5411         my ($project_info, @keys) = @_;
5412
5413         # return List::MoreUtils::any { !exists $project_info->{$_} } @keys;
5414         foreach my $key (@keys) {
5415                 if (!exists $project_info->{$key}) {
5416                         return 1;
5417                 }
5418         }
5419         return;
5420 }
5421
5422 # fills project list info (age, description, owner, category, forks, etc.)
5423 # for each project in the list, removing invalid projects from
5424 # returned list, or fill only specified info.
5425 #
5426 # Invalid projects are removed from the returned list if and only if you
5427 # ask 'age' or 'age_string' to be filled, because they are the only fields
5428 # that run unconditionally git command that requires repository, and
5429 # therefore do always check if project repository is invalid.
5430 #
5431 # USAGE:
5432 # * fill_project_list_info(\@project_list, 'descr_long', 'ctags')
5433 #   ensures that 'descr_long' and 'ctags' fields are filled
5434 # * @project_list = fill_project_list_info(\@project_list)
5435 #   ensures that all fields are filled (and invalid projects removed)
5436 #
5437 # NOTE: modifies $projlist, but does not remove entries from it
5438 sub fill_project_list_info {
5439         my ($projlist, @wanted_keys) = @_;
5440         my @projects;
5441         my $filter_set = sub { return @_; };
5442         if (@wanted_keys) {
5443                 my %wanted_keys = map { $_ => 1 } @wanted_keys;
5444                 $filter_set = sub { return grep { $wanted_keys{$_} } @_; };
5445         }
5446
5447         my $show_ctags = gitweb_check_feature('ctags');
5448  PROJECT:
5449         foreach my $pr (@$projlist) {
5450                 if (project_info_needs_filling($pr, $filter_set->('age', 'age_string'))) {
5451                         my (@activity) = git_get_last_activity($pr->{'path'});
5452                         unless (@activity) {
5453                                 next PROJECT;
5454                         }
5455                         ($pr->{'age'}, $pr->{'age_string'}) = @activity;
5456                 }
5457                 if (project_info_needs_filling($pr, $filter_set->('descr', 'descr_long'))) {
5458                         my $descr = git_get_project_description($pr->{'path'}) || "";
5459                         $descr = to_utf8($descr);
5460                         $pr->{'descr_long'} = $descr;
5461                         $pr->{'descr'} = chop_str($descr, $projects_list_description_width, 5);
5462                 }
5463                 if (project_info_needs_filling($pr, $filter_set->('owner'))) {
5464                         $pr->{'owner'} = git_get_project_owner("$pr->{'path'}") || "";
5465                 }
5466                 if ($show_ctags &&
5467                     project_info_needs_filling($pr, $filter_set->('ctags'))) {
5468                         $pr->{'ctags'} = git_get_project_ctags($pr->{'path'});
5469                 }
5470                 if ($projects_list_group_categories &&
5471                     project_info_needs_filling($pr, $filter_set->('category'))) {
5472                         my $cat = git_get_project_category($pr->{'path'}) ||
5473                                                            $project_list_default_category;
5474                         $pr->{'category'} = to_utf8($cat);
5475                 }
5476
5477                 push @projects, $pr;
5478         }
5479
5480         return @projects;
5481 }
5482
5483 sub sort_projects_list {
5484         my ($projlist, $order) = @_;
5485         my @projects;
5486
5487         my %order_info = (
5488                 project => { key => 'path', type => 'str' },
5489                 descr => { key => 'descr_long', type => 'str' },
5490                 owner => { key => 'owner', type => 'str' },
5491                 age => { key => 'age', type => 'num' }
5492         );
5493         my $oi = $order_info{$order};
5494         return @$projlist unless defined $oi;
5495         if ($oi->{'type'} eq 'str') {
5496                 @projects = sort {$a->{$oi->{'key'}} cmp $b->{$oi->{'key'}}} @$projlist;
5497         } else {
5498                 @projects = sort {$a->{$oi->{'key'}} <=> $b->{$oi->{'key'}}} @$projlist;
5499         }
5500
5501         return @projects;
5502 }
5503
5504 # returns a hash of categories, containing the list of project
5505 # belonging to each category
5506 sub build_projlist_by_category {
5507         my ($projlist, $from, $to) = @_;
5508         my %categories;
5509
5510         $from = 0 unless defined $from;
5511         $to = $#$projlist if (!defined $to || $#$projlist < $to);
5512
5513         for (my $i = $from; $i <= $to; $i++) {
5514                 my $pr = $projlist->[$i];
5515                 push @{$categories{ $pr->{'category'} }}, $pr;
5516         }
5517
5518         return wantarray ? %categories : \%categories;
5519 }
5520
5521 # print 'sort by' <th> element, generating 'sort by $name' replay link
5522 # if that order is not selected
5523 sub print_sort_th {
5524         print format_sort_th(@_);
5525 }
5526
5527 sub format_sort_th {
5528         my ($name, $order, $header) = @_;
5529         my $sort_th = "";
5530         $header ||= ucfirst($name);
5531
5532         if ($order eq $name) {
5533                 $sort_th .= "<th>$header</th>\n";
5534         } else {
5535                 $sort_th .= "<th>" .
5536                             $cgi->a({-href => href(-replay=>1, order=>$name),
5537                                      -class => "header"}, $header) .
5538                             "</th>\n";
5539         }
5540
5541         return $sort_th;
5542 }
5543
5544 sub git_project_list_rows {
5545         my ($projlist, $from, $to, $check_forks) = @_;
5546
5547         $from = 0 unless defined $from;
5548         $to = $#$projlist if (!defined $to || $#$projlist < $to);
5549
5550         my $alternate = 1;
5551         for (my $i = $from; $i <= $to; $i++) {
5552                 my $pr = $projlist->[$i];
5553
5554                 if ($alternate) {
5555                         print "<tr class=\"dark\">\n";
5556                 } else {
5557                         print "<tr class=\"light\">\n";
5558                 }
5559                 $alternate ^= 1;
5560
5561                 if ($check_forks) {
5562                         print "<td>";
5563                         if ($pr->{'forks'}) {
5564                                 my $nforks = scalar @{$pr->{'forks'}};
5565                                 if ($nforks > 0) {
5566                                         print $cgi->a({-href => href(project=>$pr->{'path'}, action=>"forks"),
5567                                                        -title => "$nforks forks"}, "+");
5568                                 } else {
5569                                         print $cgi->span({-title => "$nforks forks"}, "+");
5570                                 }
5571                         }
5572                         print "</td>\n";
5573                 }
5574                 print "<td>" . $cgi->a({-href => href(project=>$pr->{'path'}, action=>"summary"),
5575                                         -class => "list"},
5576                                        esc_html_match_hl($pr->{'path'}, $search_regexp)) .
5577                       "</td>\n" .
5578                       "<td>" . $cgi->a({-href => href(project=>$pr->{'path'}, action=>"summary"),
5579                                         -class => "list",
5580                                         -title => $pr->{'descr_long'}},
5581                                         $search_regexp
5582                                         ? esc_html_match_hl_chopped($pr->{'descr_long'},
5583                                                                     $pr->{'descr'}, $search_regexp)
5584                                         : esc_html($pr->{'descr'})) .
5585                       "</td>\n" .
5586                       "<td><i>" . chop_and_escape_str($pr->{'owner'}, 15) . "</i></td>\n";
5587                 print "<td class=\"". age_class($pr->{'age'}) . "\">" .
5588                       (defined $pr->{'age_string'} ? $pr->{'age_string'} : "No commits") . "</td>\n" .
5589                       "<td class=\"link\">" .
5590                       $cgi->a({-href => href(project=>$pr->{'path'}, action=>"summary")}, "summary")   . " | " .
5591                       $cgi->a({-href => href(project=>$pr->{'path'}, action=>"shortlog")}, "shortlog") . " | " .
5592                       $cgi->a({-href => href(project=>$pr->{'path'}, action=>"log")}, "log") . " | " .
5593                       $cgi->a({-href => href(project=>$pr->{'path'}, action=>"tree")}, "tree") .
5594                       ($pr->{'forks'} ? " | " . $cgi->a({-href => href(project=>$pr->{'path'}, action=>"forks")}, "forks") : '') .
5595                       "</td>\n" .
5596                       "</tr>\n";
5597         }
5598 }
5599
5600 sub git_project_list_body {
5601         # actually uses global variable $project
5602         my ($projlist, $order, $from, $to, $extra, $no_header) = @_;
5603         my @projects = @$projlist;
5604
5605         my $check_forks = gitweb_check_feature('forks');
5606         my $show_ctags  = gitweb_check_feature('ctags');
5607         my $tagfilter = $show_ctags ? $input_params{'ctag'} : undef;
5608         $check_forks = undef
5609                 if ($tagfilter || $search_regexp);
5610
5611         # filtering out forks before filling info allows to do less work
5612         @projects = filter_forks_from_projects_list(\@projects)
5613                 if ($check_forks);
5614         # search_projects_list pre-fills required info
5615         @projects = search_projects_list(\@projects,
5616                                          'search_regexp' => $search_regexp,
5617                                          'tagfilter'  => $tagfilter)
5618                 if ($tagfilter || $search_regexp);
5619         # fill the rest
5620         @projects = fill_project_list_info(\@projects);
5621
5622         $order ||= $default_projects_order;
5623         $from = 0 unless defined $from;
5624         $to = $#projects if (!defined $to || $#projects < $to);
5625
5626         # short circuit
5627         if ($from > $to) {
5628                 print "<center>\n".
5629                       "<b>No such projects found</b><br />\n".
5630                       "Click ".$cgi->a({-href=>href(project=>undef)},"here")." to view all projects<br />\n".
5631                       "</center>\n<br />\n";
5632                 return;
5633         }
5634
5635         @projects = sort_projects_list(\@projects, $order);
5636
5637         if ($show_ctags) {
5638                 my $ctags = git_gather_all_ctags(\@projects);
5639                 my $cloud = git_populate_project_tagcloud($ctags);
5640                 print git_show_project_tagcloud($cloud, 64);
5641         }
5642
5643         print "<table class=\"project_list\">\n";
5644         unless ($no_header) {
5645                 print "<tr>\n";
5646                 if ($check_forks) {
5647                         print "<th></th>\n";
5648                 }
5649                 print_sort_th('project', $order, 'Project');
5650                 print_sort_th('descr', $order, 'Description');
5651                 print_sort_th('owner', $order, 'Owner');
5652                 print_sort_th('age', $order, 'Last Change');
5653                 print "<th></th>\n" . # for links
5654                       "</tr>\n";
5655         }
5656
5657         if ($projects_list_group_categories) {
5658                 # only display categories with projects in the $from-$to window
5659                 @projects = sort {$a->{'category'} cmp $b->{'category'}} @projects[$from..$to];
5660                 my %categories = build_projlist_by_category(\@projects, $from, $to);
5661                 foreach my $cat (sort keys %categories) {
5662                         unless ($cat eq "") {
5663                                 print "<tr>\n";
5664                                 if ($check_forks) {
5665                                         print "<td></td>\n";
5666                                 }
5667                                 print "<td class=\"category\" colspan=\"5\">".esc_html($cat)."</td>\n";
5668                                 print "</tr>\n";
5669                         }
5670
5671                         git_project_list_rows($categories{$cat}, undef, undef, $check_forks);
5672                 }
5673         } else {
5674                 git_project_list_rows(\@projects, $from, $to, $check_forks);
5675         }
5676
5677         if (defined $extra) {
5678                 print "<tr>\n";
5679                 if ($check_forks) {
5680                         print "<td></td>\n";
5681                 }
5682                 print "<td colspan=\"5\">$extra</td>\n" .
5683                       "</tr>\n";
5684         }
5685         print "</table>\n";
5686 }
5687
5688 sub git_log_body {
5689         # uses global variable $project
5690         my ($commitlist, $from, $to, $refs, $extra) = @_;
5691
5692         $from = 0 unless defined $from;
5693         $to = $#{$commitlist} if (!defined $to || $#{$commitlist} < $to);
5694
5695         for (my $i = 0; $i <= $to; $i++) {
5696                 my %co = %{$commitlist->[$i]};
5697                 next if !%co;
5698                 my $commit = $co{'id'};
5699                 my $ref = format_ref_marker($refs, $commit);
5700                 git_print_header_div('commit',
5701                                "<span class=\"age\">$co{'age_string'}</span>" .
5702                                esc_html($co{'title'}) . $ref,
5703                                $commit);
5704                 print "<div class=\"title_text\">\n" .
5705                       "<div class=\"log_link\">\n" .
5706                       $cgi->a({-href => href(action=>"commit", hash=>$commit)}, "commit") .
5707                       " | " .
5708                       $cgi->a({-href => href(action=>"commitdiff", hash=>$commit)}, "commitdiff") .
5709                       " | " .
5710                       $cgi->a({-href => href(action=>"tree", hash=>$commit, hash_base=>$commit)}, "tree") .
5711                       "<br/>\n" .
5712                       "</div>\n";
5713                       git_print_authorship(\%co, -tag => 'span');
5714                       print "<br/>\n</div>\n";
5715
5716                 print "<div class=\"log_body\">\n";
5717                 git_print_log($co{'comment'}, -final_empty_line=> 1);
5718                 print "</div>\n";
5719         }
5720         if ($extra) {
5721                 print "<div class=\"page_nav\">\n";
5722                 print "$extra\n";
5723                 print "</div>\n";
5724         }
5725 }
5726
5727 sub git_shortlog_body {
5728         # uses global variable $project
5729         my ($commitlist, $from, $to, $refs, $extra) = @_;
5730
5731         $from = 0 unless defined $from;
5732         $to = $#{$commitlist} if (!defined $to || $#{$commitlist} < $to);
5733
5734         print "<table class=\"shortlog\">\n";
5735         my $alternate = 1;
5736         for (my $i = $from; $i <= $to; $i++) {
5737                 my %co = %{$commitlist->[$i]};
5738                 my $commit = $co{'id'};
5739                 my $ref = format_ref_marker($refs, $commit);
5740                 if ($alternate) {
5741                         print "<tr class=\"dark\">\n";
5742                 } else {
5743                         print "<tr class=\"light\">\n";
5744                 }
5745                 $alternate ^= 1;
5746                 # git_summary() used print "<td><i>$co{'age_string'}</i></td>\n" .
5747                 print "<td title=\"$co{'age_string_age'}\"><i>$co{'age_string_date'}</i></td>\n" .
5748                       format_author_html('td', \%co, 10) . "<td>";
5749                 print format_subject_html($co{'title'}, $co{'title_short'},
5750                                           href(action=>"commit", hash=>$commit), $ref);
5751                 print "</td>\n" .
5752                       "<td class=\"link\">" .
5753                       $cgi->a({-href => href(action=>"commit", hash=>$commit)}, "commit") . " | " .
5754                       $cgi->a({-href => href(action=>"commitdiff", hash=>$commit)}, "commitdiff") . " | " .
5755                       $cgi->a({-href => href(action=>"tree", hash=>$commit, hash_base=>$commit)}, "tree");
5756                 my $snapshot_links = format_snapshot_links($commit);
5757                 if (defined $snapshot_links) {
5758                         print " | " . $snapshot_links;
5759                 }
5760                 print "</td>\n" .
5761                       "</tr>\n";
5762         }
5763         if (defined $extra) {
5764                 print "<tr>\n" .
5765                       "<td colspan=\"4\">$extra</td>\n" .
5766                       "</tr>\n";
5767         }
5768         print "</table>\n";
5769 }
5770
5771 sub git_history_body {
5772         # Warning: assumes constant type (blob or tree) during history
5773         my ($commitlist, $from, $to, $refs, $extra,
5774             $file_name, $file_hash, $ftype) = @_;
5775
5776         $from = 0 unless defined $from;
5777         $to = $#{$commitlist} unless (defined $to && $to <= $#{$commitlist});
5778
5779         print "<table class=\"history\">\n";
5780         my $alternate = 1;
5781         for (my $i = $from; $i <= $to; $i++) {
5782                 my %co = %{$commitlist->[$i]};
5783                 if (!%co) {
5784                         next;
5785                 }
5786                 my $commit = $co{'id'};
5787
5788                 my $ref = format_ref_marker($refs, $commit);
5789
5790                 if ($alternate) {
5791                         print "<tr class=\"dark\">\n";
5792                 } else {
5793                         print "<tr class=\"light\">\n";
5794                 }
5795                 $alternate ^= 1;
5796                 print "<td title=\"$co{'age_string_age'}\"><i>$co{'age_string_date'}</i></td>\n" .
5797         # shortlog:   format_author_html('td', \%co, 10)
5798                       format_author_html('td', \%co, 15, 3) . "<td>";
5799                 # originally git_history used chop_str($co{'title'}, 50)
5800                 print format_subject_html($co{'title'}, $co{'title_short'},
5801                                           href(action=>"commit", hash=>$commit), $ref);
5802                 print "</td>\n" .
5803                       "<td class=\"link\">" .
5804                       $cgi->a({-href => href(action=>$ftype, hash_base=>$commit, file_name=>$file_name)}, $ftype) . " | " .
5805                       $cgi->a({-href => href(action=>"commitdiff", hash=>$commit)}, "commitdiff");
5806
5807                 if ($ftype eq 'blob') {
5808                         my $blob_current = $file_hash;
5809                         my $blob_parent  = git_get_hash_by_path($commit, $file_name);
5810                         if (defined $blob_current && defined $blob_parent &&
5811                                         $blob_current ne $blob_parent) {
5812                                 print " | " .
5813                                         $cgi->a({-href => href(action=>"blobdiff",
5814                                                                hash=>$blob_current, hash_parent=>$blob_parent,
5815                                                                hash_base=>$hash_base, hash_parent_base=>$commit,
5816                                                                file_name=>$file_name)},
5817                                                 "diff to current");
5818                         }
5819                 }
5820                 print "</td>\n" .
5821                       "</tr>\n";
5822         }
5823         if (defined $extra) {
5824                 print "<tr>\n" .
5825                       "<td colspan=\"4\">$extra</td>\n" .
5826                       "</tr>\n";
5827         }
5828         print "</table>\n";
5829 }
5830
5831 sub git_tags_body {
5832         # uses global variable $project
5833         my ($taglist, $from, $to, $extra) = @_;
5834         $from = 0 unless defined $from;
5835         $to = $#{$taglist} if (!defined $to || $#{$taglist} < $to);
5836
5837         print "<table class=\"tags\">\n";
5838         my $alternate = 1;
5839         for (my $i = $from; $i <= $to; $i++) {
5840                 my $entry = $taglist->[$i];
5841                 my %tag = %$entry;
5842                 my $comment = $tag{'subject'};
5843                 my $comment_short;
5844                 if (defined $comment) {
5845                         $comment_short = chop_str($comment, 30, 5);
5846                 }
5847                 if ($alternate) {
5848                         print "<tr class=\"dark\">\n";
5849                 } else {
5850                         print "<tr class=\"light\">\n";
5851                 }
5852                 $alternate ^= 1;
5853                 if (defined $tag{'age'}) {
5854                         print "<td><i>$tag{'age'}</i></td>\n";
5855                 } else {
5856                         print "<td></td>\n";
5857                 }
5858                 print "<td>" .
5859                       $cgi->a({-href => href(action=>$tag{'reftype'}, hash=>$tag{'refid'}),
5860                                -class => "list name"}, esc_html($tag{'name'})) .
5861                       "</td>\n" .
5862                       "<td>";
5863                 if (defined $comment) {
5864                         print format_subject_html($comment, $comment_short,
5865                                                   href(action=>"tag", hash=>$tag{'id'}));
5866                 }
5867                 print "</td>\n" .
5868                       "<td class=\"selflink\">";
5869                 if ($tag{'type'} eq "tag") {
5870                         print $cgi->a({-href => href(action=>"tag", hash=>$tag{'id'})}, "tag");
5871                 } else {
5872                         print "&nbsp;";
5873                 }
5874                 print "</td>\n" .
5875                       "<td class=\"link\">" . " | " .
5876                       $cgi->a({-href => href(action=>$tag{'reftype'}, hash=>$tag{'refid'})}, $tag{'reftype'});
5877                 if ($tag{'reftype'} eq "commit") {
5878                         print " | " . $cgi->a({-href => href(action=>"shortlog", hash=>$tag{'fullname'})}, "shortlog") .
5879                               " | " . $cgi->a({-href => href(action=>"log", hash=>$tag{'fullname'})}, "log");
5880                 } elsif ($tag{'reftype'} eq "blob") {
5881                         print " | " . $cgi->a({-href => href(action=>"blob_plain", hash=>$tag{'refid'})}, "raw");
5882                 }
5883                 print "</td>\n" .
5884                       "</tr>";
5885         }
5886         if (defined $extra) {
5887                 print "<tr>\n" .
5888                       "<td colspan=\"5\">$extra</td>\n" .
5889                       "</tr>\n";
5890         }
5891         print "</table>\n";
5892 }
5893
5894 sub git_heads_body {
5895         # uses global variable $project
5896         my ($headlist, $head_at, $from, $to, $extra) = @_;
5897         $from = 0 unless defined $from;
5898         $to = $#{$headlist} if (!defined $to || $#{$headlist} < $to);
5899
5900         print "<table class=\"heads\">\n";
5901         my $alternate = 1;
5902         for (my $i = $from; $i <= $to; $i++) {
5903                 my $entry = $headlist->[$i];
5904                 my %ref = %$entry;
5905                 my $curr = defined $head_at && $ref{'id'} eq $head_at;
5906                 if ($alternate) {
5907                         print "<tr class=\"dark\">\n";
5908                 } else {
5909                         print "<tr class=\"light\">\n";
5910                 }
5911                 $alternate ^= 1;
5912                 print "<td><i>$ref{'age'}</i></td>\n" .
5913                       ($curr ? "<td class=\"current_head\">" : "<td>") .
5914                       $cgi->a({-href => href(action=>"shortlog", hash=>$ref{'fullname'}),
5915                                -class => "list name"},esc_html($ref{'name'})) .
5916                       "</td>\n" .
5917                       "<td class=\"link\">" .
5918                       $cgi->a({-href => href(action=>"shortlog", hash=>$ref{'fullname'})}, "shortlog") . " | " .
5919                       $cgi->a({-href => href(action=>"log", hash=>$ref{'fullname'})}, "log") . " | " .
5920                       $cgi->a({-href => href(action=>"tree", hash=>$ref{'fullname'}, hash_base=>$ref{'fullname'})}, "tree") .
5921                       "</td>\n" .
5922                       "</tr>";
5923         }
5924         if (defined $extra) {
5925                 print "<tr>\n" .
5926                       "<td colspan=\"3\">$extra</td>\n" .
5927                       "</tr>\n";
5928         }
5929         print "</table>\n";
5930 }
5931
5932 # Display a single remote block
5933 sub git_remote_block {
5934         my ($remote, $rdata, $limit, $head) = @_;
5935
5936         my $heads = $rdata->{'heads'};
5937         my $fetch = $rdata->{'fetch'};
5938         my $push = $rdata->{'push'};
5939
5940         my $urls_table = "<table class=\"projects_list\">\n" ;
5941
5942         if (defined $fetch) {
5943                 if ($fetch eq $push) {
5944                         $urls_table .= format_repo_url("URL", $fetch);
5945                 } else {
5946                         $urls_table .= format_repo_url("Fetch URL", $fetch);
5947                         $urls_table .= format_repo_url("Push URL", $push) if defined $push;
5948                 }
5949         } elsif (defined $push) {
5950                 $urls_table .= format_repo_url("Push URL", $push);
5951         } else {
5952                 $urls_table .= format_repo_url("", "No remote URL");
5953         }
5954
5955         $urls_table .= "</table>\n";
5956
5957         my $dots;
5958         if (defined $limit && $limit < @$heads) {
5959                 $dots = $cgi->a({-href => href(action=>"remotes", hash=>$remote)}, "...");
5960         }
5961
5962         print $urls_table;
5963         git_heads_body($heads, $head, 0, $limit, $dots);
5964 }
5965
5966 # Display a list of remote names with the respective fetch and push URLs
5967 sub git_remotes_list {
5968         my ($remotedata, $limit) = @_;
5969         print "<table class=\"heads\">\n";
5970         my $alternate = 1;
5971         my @remotes = sort keys %$remotedata;
5972
5973         my $limited = $limit && $limit < @remotes;
5974
5975         $#remotes = $limit - 1 if $limited;
5976
5977         while (my $remote = shift @remotes) {
5978                 my $rdata = $remotedata->{$remote};
5979                 my $fetch = $rdata->{'fetch'};
5980                 my $push = $rdata->{'push'};
5981                 if ($alternate) {
5982                         print "<tr class=\"dark\">\n";
5983                 } else {
5984                         print "<tr class=\"light\">\n";
5985                 }
5986                 $alternate ^= 1;
5987                 print "<td>" .
5988                       $cgi->a({-href=> href(action=>'remotes', hash=>$remote),
5989                                -class=> "list name"},esc_html($remote)) .
5990                       "</td>";
5991                 print "<td class=\"link\">" .
5992                       (defined $fetch ? $cgi->a({-href=> $fetch}, "fetch") : "fetch") .
5993                       " | " .
5994                       (defined $push ? $cgi->a({-href=> $push}, "push") : "push") .
5995                       "</td>";
5996
5997                 print "</tr>\n";
5998         }
5999
6000         if ($limited) {
6001                 print "<tr>\n" .
6002                       "<td colspan=\"3\">" .
6003                       $cgi->a({-href => href(action=>"remotes")}, "...") .
6004                       "</td>\n" . "</tr>\n";
6005         }
6006
6007         print "</table>";
6008 }
6009
6010 # Display remote heads grouped by remote, unless there are too many
6011 # remotes, in which case we only display the remote names
6012 sub git_remotes_body {
6013         my ($remotedata, $limit, $head) = @_;
6014         if ($limit and $limit < keys %$remotedata) {
6015                 git_remotes_list($remotedata, $limit);
6016         } else {
6017                 fill_remote_heads($remotedata);
6018                 while (my ($remote, $rdata) = each %$remotedata) {
6019                         git_print_section({-class=>"remote", -id=>$remote},
6020                                 ["remotes", $remote, $remote], sub {
6021                                         git_remote_block($remote, $rdata, $limit, $head);
6022                                 });
6023                 }
6024         }
6025 }
6026
6027 sub git_search_message {
6028         my %co = @_;
6029
6030         my $greptype;
6031         if ($searchtype eq 'commit') {
6032                 $greptype = "--grep=";
6033         } elsif ($searchtype eq 'author') {
6034                 $greptype = "--author=";
6035         } elsif ($searchtype eq 'committer') {
6036                 $greptype = "--committer=";
6037         }
6038         $greptype .= $searchtext;
6039         my @commitlist = parse_commits($hash, 101, (100 * $page), undef,
6040                                        $greptype, '--regexp-ignore-case',
6041                                        $search_use_regexp ? '--extended-regexp' : '--fixed-strings');
6042
6043         my $paging_nav = '';
6044         if ($page > 0) {
6045                 $paging_nav .=
6046                         $cgi->a({-href => href(-replay=>1, page=>undef)},
6047                                 "first") .
6048                         " &sdot; " .
6049                         $cgi->a({-href => href(-replay=>1, page=>$page-1),
6050                                  -accesskey => "p", -title => "Alt-p"}, "prev");
6051         } else {
6052                 $paging_nav .= "first &sdot; prev";
6053         }
6054         my $next_link = '';
6055         if ($#commitlist >= 100) {
6056                 $next_link =
6057                         $cgi->a({-href => href(-replay=>1, page=>$page+1),
6058                                  -accesskey => "n", -title => "Alt-n"}, "next");
6059                 $paging_nav .= " &sdot; $next_link";
6060         } else {
6061                 $paging_nav .= " &sdot; next";
6062         }
6063
6064         git_header_html();
6065
6066         git_print_page_nav('','', $hash,$co{'tree'},$hash, $paging_nav);
6067         git_print_header_div('commit', esc_html($co{'title'}), $hash);
6068         if ($page == 0 && !@commitlist) {
6069                 print "<p>No match.</p>\n";
6070         } else {
6071                 git_search_grep_body(\@commitlist, 0, 99, $next_link);
6072         }
6073
6074         git_footer_html();
6075 }
6076
6077 sub git_search_changes {
6078         my %co = @_;
6079
6080         local $/ = "\n";
6081         open my $fd, '-|', git_cmd(), '--no-pager', 'log', @diff_opts,
6082                 '--pretty=format:%H', '--no-abbrev', '--raw', "-S$searchtext",
6083                 ($search_use_regexp ? '--pickaxe-regex' : ())
6084                         or die_error(500, "Open git-log failed");
6085
6086         git_header_html();
6087
6088         git_print_page_nav('','', $hash,$co{'tree'},$hash);
6089         git_print_header_div('commit', esc_html($co{'title'}), $hash);
6090
6091         print "<table class=\"pickaxe search\">\n";
6092         my $alternate = 1;
6093         undef %co;
6094         my @files;
6095         while (my $line = <$fd>) {
6096                 chomp $line;
6097                 next unless $line;
6098
6099                 my %set = parse_difftree_raw_line($line);
6100                 if (defined $set{'commit'}) {
6101                         # finish previous commit
6102                         if (%co) {
6103                                 print "</td>\n" .
6104                                       "<td class=\"link\">" .
6105                                       $cgi->a({-href => href(action=>"commit", hash=>$co{'id'})},
6106                                               "commit") .
6107                                       " | " .
6108                                       $cgi->a({-href => href(action=>"tree", hash=>$co{'tree'},
6109                                                              hash_base=>$co{'id'})},
6110                                               "tree") .
6111                                       "</td>\n" .
6112                                       "</tr>\n";
6113                         }
6114
6115                         if ($alternate) {
6116                                 print "<tr class=\"dark\">\n";
6117                         } else {
6118                                 print "<tr class=\"light\">\n";
6119                         }
6120                         $alternate ^= 1;
6121                         %co = parse_commit($set{'commit'});
6122                         my $author = chop_and_escape_str($co{'author_name'}, 15, 5);
6123                         print "<td title=\"$co{'age_string_age'}\"><i>$co{'age_string_date'}</i></td>\n" .
6124                               "<td><i>$author</i></td>\n" .
6125                               "<td>" .
6126                               $cgi->a({-href => href(action=>"commit", hash=>$co{'id'}),
6127                                       -class => "list subject"},
6128                                       chop_and_escape_str($co{'title'}, 50) . "<br/>");
6129                 } elsif (defined $set{'to_id'}) {
6130                         next if ($set{'to_id'} =~ m/^0{40}$/);
6131
6132                         print $cgi->a({-href => href(action=>"blob", hash_base=>$co{'id'},
6133                                                      hash=>$set{'to_id'}, file_name=>$set{'to_file'}),
6134                                       -class => "list"},
6135                                       "<span class=\"match\">" . esc_path($set{'file'}) . "</span>") .
6136                               "<br/>\n";
6137                 }
6138         }
6139         close $fd;
6140
6141         # finish last commit (warning: repetition!)
6142         if (%co) {
6143                 print "</td>\n" .
6144                       "<td class=\"link\">" .
6145                       $cgi->a({-href => href(action=>"commit", hash=>$co{'id'})},
6146                               "commit") .
6147                       " | " .
6148                       $cgi->a({-href => href(action=>"tree", hash=>$co{'tree'},
6149                                              hash_base=>$co{'id'})},
6150                               "tree") .
6151                       "</td>\n" .
6152                       "</tr>\n";
6153         }
6154
6155         print "</table>\n";
6156
6157         git_footer_html();
6158 }
6159
6160 sub git_search_files {
6161         my %co = @_;
6162
6163         local $/ = "\n";
6164         open my $fd, "-|", git_cmd(), 'grep', '-n', '-z',
6165                 $search_use_regexp ? ('-E', '-i') : '-F',
6166                 $searchtext, $co{'tree'}
6167                         or die_error(500, "Open git-grep failed");
6168
6169         git_header_html();
6170
6171         git_print_page_nav('','', $hash,$co{'tree'},$hash);
6172         git_print_header_div('commit', esc_html($co{'title'}), $hash);
6173
6174         print "<table class=\"grep_search\">\n";
6175         my $alternate = 1;
6176         my $matches = 0;
6177         my $lastfile = '';
6178         my $file_href;
6179         while (my $line = <$fd>) {
6180                 chomp $line;
6181                 my ($file, $lno, $ltext, $binary);
6182                 last if ($matches++ > 1000);
6183                 if ($line =~ /^Binary file (.+) matches$/) {
6184                         $file = $1;
6185                         $binary = 1;
6186                 } else {
6187                         ($file, $lno, $ltext) = split(/\0/, $line, 3);
6188                         $file =~ s/^$co{'tree'}://;
6189                 }
6190                 if ($file ne $lastfile) {
6191                         $lastfile and print "</td></tr>\n";
6192                         if ($alternate++) {
6193                                 print "<tr class=\"dark\">\n";
6194                         } else {
6195                                 print "<tr class=\"light\">\n";
6196                         }
6197                         $file_href = href(action=>"blob", hash_base=>$co{'id'},
6198                                           file_name=>$file);
6199                         print "<td class=\"list\">".
6200                                 $cgi->a({-href => $file_href, -class => "list"}, esc_path($file));
6201                         print "</td><td>\n";
6202                         $lastfile = $file;
6203                 }
6204                 if ($binary) {
6205                         print "<div class=\"binary\">Binary file</div>\n";
6206                 } else {
6207                         $ltext = untabify($ltext);
6208                         if ($ltext =~ m/^(.*)($search_regexp)(.*)$/i) {
6209                                 $ltext = esc_html($1, -nbsp=>1);
6210                                 $ltext .= '<span class="match">';
6211                                 $ltext .= esc_html($2, -nbsp=>1);
6212                                 $ltext .= '</span>';
6213                                 $ltext .= esc_html($3, -nbsp=>1);
6214                         } else {
6215                                 $ltext = esc_html($ltext, -nbsp=>1);
6216                         }
6217                         print "<div class=\"pre\">" .
6218                                 $cgi->a({-href => $file_href.'#l'.$lno,
6219                                         -class => "linenr"}, sprintf('%4i', $lno)) .
6220                                 ' ' .  $ltext . "</div>\n";
6221                 }
6222         }
6223         if ($lastfile) {
6224                 print "</td></tr>\n";
6225                 if ($matches > 1000) {
6226                         print "<div class=\"diff nodifferences\">Too many matches, listing trimmed</div>\n";
6227                 }
6228         } else {
6229                 print "<div class=\"diff nodifferences\">No matches found</div>\n";
6230         }
6231         close $fd;
6232
6233         print "</table>\n";
6234
6235         git_footer_html();
6236 }
6237
6238 sub git_search_grep_body {
6239         my ($commitlist, $from, $to, $extra) = @_;
6240         $from = 0 unless defined $from;
6241         $to = $#{$commitlist} if (!defined $to || $#{$commitlist} < $to);
6242
6243         print "<table class=\"commit_search\">\n";
6244         my $alternate = 1;
6245         for (my $i = $from; $i <= $to; $i++) {
6246                 my %co = %{$commitlist->[$i]};
6247                 if (!%co) {
6248                         next;
6249                 }
6250                 my $commit = $co{'id'};
6251                 if ($alternate) {
6252                         print "<tr class=\"dark\">\n";
6253                 } else {
6254                         print "<tr class=\"light\">\n";
6255                 }
6256                 $alternate ^= 1;
6257                 print "<td title=\"$co{'age_string_age'}\"><i>$co{'age_string_date'}</i></td>\n" .
6258                       format_author_html('td', \%co, 15, 5) .
6259                       "<td>" .
6260                       $cgi->a({-href => href(action=>"commit", hash=>$co{'id'}),
6261                                -class => "list subject"},
6262                               chop_and_escape_str($co{'title'}, 50) . "<br/>");
6263                 my $comment = $co{'comment'};
6264                 foreach my $line (@$comment) {
6265                         if ($line =~ m/^(.*?)($search_regexp)(.*)$/i) {
6266                                 my ($lead, $match, $trail) = ($1, $2, $3);
6267                                 $match = chop_str($match, 70, 5, 'center');
6268                                 my $contextlen = int((80 - length($match))/2);
6269                                 $contextlen = 30 if ($contextlen > 30);
6270                                 $lead  = chop_str($lead,  $contextlen, 10, 'left');
6271                                 $trail = chop_str($trail, $contextlen, 10, 'right');
6272
6273                                 $lead  = esc_html($lead);
6274                                 $match = esc_html($match);
6275                                 $trail = esc_html($trail);
6276
6277                                 print "$lead<span class=\"match\">$match</span>$trail<br />";
6278                         }
6279                 }
6280                 print "</td>\n" .
6281                       "<td class=\"link\">" .
6282                       $cgi->a({-href => href(action=>"commit", hash=>$co{'id'})}, "commit") .
6283                       " | " .
6284                       $cgi->a({-href => href(action=>"commitdiff", hash=>$co{'id'})}, "commitdiff") .
6285                       " | " .
6286                       $cgi->a({-href => href(action=>"tree", hash=>$co{'tree'}, hash_base=>$co{'id'})}, "tree");
6287                 print "</td>\n" .
6288                       "</tr>\n";
6289         }
6290         if (defined $extra) {
6291                 print "<tr>\n" .
6292                       "<td colspan=\"3\">$extra</td>\n" .
6293                       "</tr>\n";
6294         }
6295         print "</table>\n";
6296 }
6297
6298 ## ======================================================================
6299 ## ======================================================================
6300 ## actions
6301
6302 sub git_project_list {
6303         my $order = $input_params{'order'};
6304         if (defined $order && $order !~ m/none|project|descr|owner|age/) {
6305                 die_error(400, "Unknown order parameter");
6306         }
6307
6308         my @list = git_get_projects_list($project_filter, $strict_export);
6309         if (!@list) {
6310                 die_error(404, "No projects found");
6311         }
6312
6313         git_header_html();
6314         if (defined $home_text && -f $home_text) {
6315                 print "<div class=\"index_include\">\n";
6316                 insert_file($home_text);
6317                 print "</div>\n";
6318         }
6319
6320         git_project_search_form($searchtext, $search_use_regexp);
6321         git_project_list_body(\@list, $order);
6322         git_footer_html();
6323 }
6324
6325 sub git_forks {
6326         my $order = $input_params{'order'};
6327         if (defined $order && $order !~ m/none|project|descr|owner|age/) {
6328                 die_error(400, "Unknown order parameter");
6329         }
6330
6331         my $filter = $project;
6332         $filter =~ s/\.git$//;
6333         my @list = git_get_projects_list($filter);
6334         if (!@list) {
6335                 die_error(404, "No forks found");
6336         }
6337
6338         git_header_html();
6339         git_print_page_nav('','');
6340         git_print_header_div('summary', "$project forks");
6341         git_project_list_body(\@list, $order);
6342         git_footer_html();
6343 }
6344
6345 sub git_project_index {
6346         my @projects = git_get_projects_list($project_filter, $strict_export);
6347         if (!@projects) {
6348                 die_error(404, "No projects found");
6349         }
6350
6351         print $cgi->header(
6352                 -type => 'text/plain',
6353                 -charset => 'utf-8',
6354                 -content_disposition => 'inline; filename="index.aux"');
6355
6356         foreach my $pr (@projects) {
6357                 if (!exists $pr->{'owner'}) {
6358                         $pr->{'owner'} = git_get_project_owner("$pr->{'path'}");
6359                 }
6360
6361                 my ($path, $owner) = ($pr->{'path'}, $pr->{'owner'});
6362                 # quote as in CGI::Util::encode, but keep the slash, and use '+' for ' '
6363                 $path  =~ s/([^a-zA-Z0-9_.\-\/ ])/sprintf("%%%02X", ord($1))/eg;
6364                 $owner =~ s/([^a-zA-Z0-9_.\-\/ ])/sprintf("%%%02X", ord($1))/eg;
6365                 $path  =~ s/ /\+/g;
6366                 $owner =~ s/ /\+/g;
6367
6368                 print "$path $owner\n";
6369         }
6370 }
6371
6372 sub git_summary {
6373         my $descr = git_get_project_description($project) || "none";
6374         my %co = parse_commit("HEAD");
6375         my %cd = %co ? parse_date($co{'committer_epoch'}, $co{'committer_tz'}) : ();
6376         my $head = $co{'id'};
6377         my $remote_heads = gitweb_check_feature('remote_heads');
6378
6379         my $owner = git_get_project_owner($project);
6380
6381         my $refs = git_get_references();
6382         # These get_*_list functions return one more to allow us to see if
6383         # there are more ...
6384         my @taglist  = git_get_tags_list(16);
6385         my @headlist = git_get_heads_list(16);
6386         my %remotedata = $remote_heads ? git_get_remotes_list() : ();
6387         my @forklist;
6388         my $check_forks = gitweb_check_feature('forks');
6389
6390         if ($check_forks) {
6391                 # find forks of a project
6392                 my $filter = $project;
6393                 $filter =~ s/\.git$//;
6394                 @forklist = git_get_projects_list($filter);
6395                 # filter out forks of forks
6396                 @forklist = filter_forks_from_projects_list(\@forklist)
6397                         if (@forklist);
6398         }
6399
6400         git_header_html();
6401         git_print_page_nav('summary','', $head);
6402
6403         print "<div class=\"title\">&nbsp;</div>\n";
6404         print "<table class=\"projects_list\">\n" .
6405               "<tr id=\"metadata_desc\"><td>description</td><td>" . esc_html($descr) . "</td></tr>\n" .
6406               "<tr id=\"metadata_owner\"><td>owner</td><td>" . esc_html($owner) . "</td></tr>\n";
6407         if (defined $cd{'rfc2822'}) {
6408                 print "<tr id=\"metadata_lchange\"><td>last change</td>" .
6409                       "<td>".format_timestamp_html(\%cd)."</td></tr>\n";
6410         }
6411
6412         # use per project git URL list in $projectroot/$project/cloneurl
6413         # or make project git URL from git base URL and project name
6414         my $url_tag = "URL";
6415         my @url_list = git_get_project_url_list($project);
6416         @url_list = map { "$_/$project" } @git_base_url_list unless @url_list;
6417         foreach my $git_url (@url_list) {
6418                 next unless $git_url;
6419                 print format_repo_url($url_tag, $git_url);
6420                 $url_tag = "";
6421         }
6422
6423         # Tag cloud
6424         my $show_ctags = gitweb_check_feature('ctags');
6425         if ($show_ctags) {
6426                 my $ctags = git_get_project_ctags($project);
6427                 if (%$ctags) {
6428                         # without ability to add tags, don't show if there are none
6429                         my $cloud = git_populate_project_tagcloud($ctags);
6430                         print "<tr id=\"metadata_ctags\">" .
6431                               "<td>content tags</td>" .
6432                               "<td>".git_show_project_tagcloud($cloud, 48)."</td>" .
6433                               "</tr>\n";
6434                 }
6435         }
6436
6437         print "</table>\n";
6438
6439         # If XSS prevention is on, we don't include README.html.
6440         # TODO: Allow a readme in some safe format.
6441         if (!$prevent_xss && -s "$projectroot/$project/README.html") {
6442                 print "<div class=\"title\">readme</div>\n" .
6443                       "<div class=\"readme\">\n";
6444                 insert_file("$projectroot/$project/README.html");
6445                 print "\n</div>\n"; # class="readme"
6446         }
6447
6448         # we need to request one more than 16 (0..15) to check if
6449         # those 16 are all
6450         my @commitlist = $head ? parse_commits($head, 17) : ();
6451         if (@commitlist) {
6452                 git_print_header_div('shortlog');
6453                 git_shortlog_body(\@commitlist, 0, 15, $refs,
6454                                   $#commitlist <=  15 ? undef :
6455                                   $cgi->a({-href => href(action=>"shortlog")}, "..."));
6456         }
6457
6458         if (@taglist) {
6459                 git_print_header_div('tags');
6460                 git_tags_body(\@taglist, 0, 15,
6461                               $#taglist <=  15 ? undef :
6462                               $cgi->a({-href => href(action=>"tags")}, "..."));
6463         }
6464
6465         if (@headlist) {
6466                 git_print_header_div('heads');
6467                 git_heads_body(\@headlist, $head, 0, 15,
6468                                $#headlist <= 15 ? undef :
6469                                $cgi->a({-href => href(action=>"heads")}, "..."));
6470         }
6471
6472         if (%remotedata) {
6473                 git_print_header_div('remotes');
6474                 git_remotes_body(\%remotedata, 15, $head);
6475         }
6476
6477         if (@forklist) {
6478                 git_print_header_div('forks');
6479                 git_project_list_body(\@forklist, 'age', 0, 15,
6480                                       $#forklist <= 15 ? undef :
6481                                       $cgi->a({-href => href(action=>"forks")}, "..."),
6482                                       'no_header');
6483         }
6484
6485         git_footer_html();
6486 }
6487
6488 sub git_tag {
6489         my %tag = parse_tag($hash);
6490
6491         if (! %tag) {
6492                 die_error(404, "Unknown tag object");
6493         }
6494
6495         my $head = git_get_head_hash($project);
6496         git_header_html();
6497         git_print_page_nav('','', $head,undef,$head);
6498         git_print_header_div('commit', esc_html($tag{'name'}), $hash);
6499         print "<div class=\"title_text\">\n" .
6500               "<table class=\"object_header\">\n" .
6501               "<tr>\n" .
6502               "<td>object</td>\n" .
6503               "<td>" . $cgi->a({-class => "list", -href => href(action=>$tag{'type'}, hash=>$tag{'object'})},
6504                                $tag{'object'}) . "</td>\n" .
6505               "<td class=\"link\">" . $cgi->a({-href => href(action=>$tag{'type'}, hash=>$tag{'object'})},
6506                                               $tag{'type'}) . "</td>\n" .
6507               "</tr>\n";
6508         if (defined($tag{'author'})) {
6509                 git_print_authorship_rows(\%tag, 'author');
6510         }
6511         print "</table>\n\n" .
6512               "</div>\n";
6513         print "<div class=\"page_body\">";
6514         my $comment = $tag{'comment'};
6515         foreach my $line (@$comment) {
6516                 chomp $line;
6517                 print esc_html($line, -nbsp=>1) . "<br/>\n";
6518         }
6519         print "</div>\n";
6520         git_footer_html();
6521 }
6522
6523 sub git_blame_common {
6524         my $format = shift || 'porcelain';
6525         if ($format eq 'porcelain' && $input_params{'javascript'}) {
6526                 $format = 'incremental';
6527                 $action = 'blame_incremental'; # for page title etc
6528         }
6529
6530         # permissions
6531         gitweb_check_feature('blame')
6532                 or die_error(403, "Blame view not allowed");
6533
6534         # error checking
6535         die_error(400, "No file name given") unless $file_name;
6536         $hash_base ||= git_get_head_hash($project);
6537         die_error(404, "Couldn't find base commit") unless $hash_base;
6538         my %co = parse_commit($hash_base)
6539                 or die_error(404, "Commit not found");
6540         my $ftype = "blob";
6541         if (!defined $hash) {
6542                 $hash = git_get_hash_by_path($hash_base, $file_name, "blob")
6543                         or die_error(404, "Error looking up file");
6544         } else {
6545                 $ftype = git_get_type($hash);
6546                 if ($ftype !~ "blob") {
6547                         die_error(400, "Object is not a blob");
6548                 }
6549         }
6550
6551         my $fd;
6552         if ($format eq 'incremental') {
6553                 # get file contents (as base)
6554                 open $fd, "-|", git_cmd(), 'cat-file', 'blob', $hash
6555                         or die_error(500, "Open git-cat-file failed");
6556         } elsif ($format eq 'data') {
6557                 # run git-blame --incremental
6558                 open $fd, "-|", git_cmd(), "blame", "--incremental",
6559                         $hash_base, "--", $file_name
6560                         or die_error(500, "Open git-blame --incremental failed");
6561         } else {
6562                 # run git-blame --porcelain
6563                 open $fd, "-|", git_cmd(), "blame", '-p',
6564                         $hash_base, '--', $file_name
6565                         or die_error(500, "Open git-blame --porcelain failed");
6566         }
6567
6568         # incremental blame data returns early
6569         if ($format eq 'data') {
6570                 print $cgi->header(
6571                         -type=>"text/plain", -charset => "utf-8",
6572                         -status=> "200 OK");
6573                 local $| = 1; # output autoflush
6574                 while (my $line = <$fd>) {
6575                         print to_utf8($line);
6576                 }
6577                 close $fd
6578                         or print "ERROR $!\n";
6579
6580                 print 'END';
6581                 if (defined $t0 && gitweb_check_feature('timed')) {
6582                         print ' '.
6583                               tv_interval($t0, [ gettimeofday() ]).
6584                               ' '.$number_of_git_cmds;
6585                 }
6586                 print "\n";
6587
6588                 return;
6589         }
6590
6591         # page header
6592         git_header_html();
6593         my $formats_nav =
6594                 $cgi->a({-href => href(action=>"blob", -replay=>1)},
6595                         "blob") .
6596                 " | ";
6597         if ($format eq 'incremental') {
6598                 $formats_nav .=
6599                         $cgi->a({-href => href(action=>"blame", javascript=>0, -replay=>1)},
6600                                 "blame") . " (non-incremental)";
6601         } else {
6602                 $formats_nav .=
6603                         $cgi->a({-href => href(action=>"blame_incremental", -replay=>1)},
6604                                 "blame") . " (incremental)";
6605         }
6606         $formats_nav .=
6607                 " | " .
6608                 $cgi->a({-href => href(action=>"history", -replay=>1)},
6609                         "history") .
6610                 " | " .
6611                 $cgi->a({-href => href(action=>$action, file_name=>$file_name)},
6612                         "HEAD");
6613         git_print_page_nav('','', $hash_base,$co{'tree'},$hash_base, $formats_nav);
6614         git_print_header_div('commit', esc_html($co{'title'}), $hash_base);
6615         git_print_page_path($file_name, $ftype, $hash_base);
6616
6617         # page body
6618         if ($format eq 'incremental') {
6619                 print "<noscript>\n<div class=\"error\"><center><b>\n".
6620                       "This page requires JavaScript to run.\n Use ".
6621                       $cgi->a({-href => href(action=>'blame',javascript=>0,-replay=>1)},
6622                               'this page').
6623                       " instead.\n".
6624                       "</b></center></div>\n</noscript>\n";
6625
6626                 print qq!<div id="progress_bar" style="width: 100%; background-color: yellow"></div>\n!;
6627         }
6628
6629         print qq!<div class="page_body">\n!;
6630         print qq!<div id="progress_info">... / ...</div>\n!
6631                 if ($format eq 'incremental');
6632         print qq!<table id="blame_table" class="blame" width="100%">\n!.
6633               #qq!<col width="5.5em" /><col width="2.5em" /><col width="*" />\n!.
6634               qq!<thead>\n!.
6635               qq!<tr><th>Commit</th><th>Line</th><th>Data</th></tr>\n!.
6636               qq!</thead>\n!.
6637               qq!<tbody>\n!;
6638
6639         my @rev_color = qw(light dark);
6640         my $num_colors = scalar(@rev_color);
6641         my $current_color = 0;
6642
6643         if ($format eq 'incremental') {
6644                 my $color_class = $rev_color[$current_color];
6645
6646                 #contents of a file
6647                 my $linenr = 0;
6648         LINE:
6649                 while (my $line = <$fd>) {
6650                         chomp $line;
6651                         $linenr++;
6652
6653                         print qq!<tr id="l$linenr" class="$color_class">!.
6654                               qq!<td class="sha1"><a href=""> </a></td>!.
6655                               qq!<td class="linenr">!.
6656                               qq!<a class="linenr" href="">$linenr</a></td>!;
6657                         print qq!<td class="pre">! . esc_html($line) . "</td>\n";
6658                         print qq!</tr>\n!;
6659                 }
6660
6661         } else { # porcelain, i.e. ordinary blame
6662                 my %metainfo = (); # saves information about commits
6663
6664                 # blame data
6665         LINE:
6666                 while (my $line = <$fd>) {
6667                         chomp $line;
6668                         # the header: <SHA-1> <src lineno> <dst lineno> [<lines in group>]
6669                         # no <lines in group> for subsequent lines in group of lines
6670                         my ($full_rev, $orig_lineno, $lineno, $group_size) =
6671                            ($line =~ /^([0-9a-f]{40}) (\d+) (\d+)(?: (\d+))?$/);
6672                         if (!exists $metainfo{$full_rev}) {
6673                                 $metainfo{$full_rev} = { 'nprevious' => 0 };
6674                         }
6675                         my $meta = $metainfo{$full_rev};
6676                         my $data;
6677                         while ($data = <$fd>) {
6678                                 chomp $data;
6679                                 last if ($data =~ s/^\t//); # contents of line
6680                                 if ($data =~ /^(\S+)(?: (.*))?$/) {
6681                                         $meta->{$1} = $2 unless exists $meta->{$1};
6682                                 }
6683                                 if ($data =~ /^previous /) {
6684                                         $meta->{'nprevious'}++;
6685                                 }
6686                         }
6687                         my $short_rev = substr($full_rev, 0, 8);
6688                         my $author = $meta->{'author'};
6689                         my %date =
6690                                 parse_date($meta->{'author-time'}, $meta->{'author-tz'});
6691                         my $date = $date{'iso-tz'};
6692                         if ($group_size) {
6693                                 $current_color = ($current_color + 1) % $num_colors;
6694                         }
6695                         my $tr_class = $rev_color[$current_color];
6696                         $tr_class .= ' boundary' if (exists $meta->{'boundary'});
6697                         $tr_class .= ' no-previous' if ($meta->{'nprevious'} == 0);
6698                         $tr_class .= ' multiple-previous' if ($meta->{'nprevious'} > 1);
6699                         print "<tr id=\"l$lineno\" class=\"$tr_class\">\n";
6700                         if ($group_size) {
6701                                 print "<td class=\"sha1\"";
6702                                 print " title=\"". esc_html($author) . ", $date\"";
6703                                 print " rowspan=\"$group_size\"" if ($group_size > 1);
6704                                 print ">";
6705                                 print $cgi->a({-href => href(action=>"commit",
6706                                                              hash=>$full_rev,
6707                                                              file_name=>$file_name)},
6708                                               esc_html($short_rev));
6709                                 if ($group_size >= 2) {
6710                                         my @author_initials = ($author =~ /\b([[:upper:]])\B/g);
6711                                         if (@author_initials) {
6712                                                 print "<br />" .
6713                                                       esc_html(join('', @author_initials));
6714                                                 #           or join('.', ...)
6715                                         }
6716                                 }
6717                                 print "</td>\n";
6718                         }
6719                         # 'previous' <sha1 of parent commit> <filename at commit>
6720                         if (exists $meta->{'previous'} &&
6721                             $meta->{'previous'} =~ /^([a-fA-F0-9]{40}) (.*)$/) {
6722                                 $meta->{'parent'} = $1;
6723                                 $meta->{'file_parent'} = unquote($2);
6724                         }
6725                         my $linenr_commit =
6726                                 exists($meta->{'parent'}) ?
6727                                 $meta->{'parent'} : $full_rev;
6728                         my $linenr_filename =
6729                                 exists($meta->{'file_parent'}) ?
6730                                 $meta->{'file_parent'} : unquote($meta->{'filename'});
6731                         my $blamed = href(action => 'blame',
6732                                           file_name => $linenr_filename,
6733                                           hash_base => $linenr_commit);
6734                         print "<td class=\"linenr\">";
6735                         print $cgi->a({ -href => "$blamed#l$orig_lineno",
6736                                         -class => "linenr" },
6737                                       esc_html($lineno));
6738                         print "</td>";
6739                         print "<td class=\"pre\">" . esc_html($data) . "</td>\n";
6740                         print "</tr>\n";
6741                 } # end while
6742
6743         }
6744
6745         # footer
6746         print "</tbody>\n".
6747               "</table>\n"; # class="blame"
6748         print "</div>\n";   # class="blame_body"
6749         close $fd
6750                 or print "Reading blob failed\n";
6751
6752         git_footer_html();
6753 }
6754
6755 sub git_blame {
6756         git_blame_common();
6757 }
6758
6759 sub git_blame_incremental {
6760         git_blame_common('incremental');
6761 }
6762
6763 sub git_blame_data {
6764         git_blame_common('data');
6765 }
6766
6767 sub git_tags {
6768         my $head = git_get_head_hash($project);
6769         git_header_html();
6770         git_print_page_nav('','', $head,undef,$head,format_ref_views('tags'));
6771         git_print_header_div('summary', $project);
6772
6773         my @tagslist = git_get_tags_list();
6774         if (@tagslist) {
6775                 git_tags_body(\@tagslist);
6776         }
6777         git_footer_html();
6778 }
6779
6780 sub git_heads {
6781         my $head = git_get_head_hash($project);
6782         git_header_html();
6783         git_print_page_nav('','', $head,undef,$head,format_ref_views('heads'));
6784         git_print_header_div('summary', $project);
6785
6786         my @headslist = git_get_heads_list();
6787         if (@headslist) {
6788                 git_heads_body(\@headslist, $head);
6789         }
6790         git_footer_html();
6791 }
6792
6793 # used both for single remote view and for list of all the remotes
6794 sub git_remotes {
6795         gitweb_check_feature('remote_heads')
6796                 or die_error(403, "Remote heads view is disabled");
6797
6798         my $head = git_get_head_hash($project);
6799         my $remote = $input_params{'hash'};
6800
6801         my $remotedata = git_get_remotes_list($remote);
6802         die_error(500, "Unable to get remote information") unless defined $remotedata;
6803
6804         unless (%$remotedata) {
6805                 die_error(404, defined $remote ?
6806                         "Remote $remote not found" :
6807                         "No remotes found");
6808         }
6809
6810         git_header_html(undef, undef, -action_extra => $remote);
6811         git_print_page_nav('', '',  $head, undef, $head,
6812                 format_ref_views($remote ? '' : 'remotes'));
6813
6814         fill_remote_heads($remotedata);
6815         if (defined $remote) {
6816                 git_print_header_div('remotes', "$remote remote for $project");
6817                 git_remote_block($remote, $remotedata->{$remote}, undef, $head);
6818         } else {
6819                 git_print_header_div('summary', "$project remotes");
6820                 git_remotes_body($remotedata, undef, $head);
6821         }
6822
6823         git_footer_html();
6824 }
6825
6826 sub git_blob_plain {
6827         my $type = shift;
6828         my $expires;
6829
6830         if (!defined $hash) {
6831                 if (defined $file_name) {
6832                         my $base = $hash_base || git_get_head_hash($project);
6833                         $hash = git_get_hash_by_path($base, $file_name, "blob")
6834                                 or die_error(404, "Cannot find file");
6835                 } else {
6836                         die_error(400, "No file name defined");
6837                 }
6838         } elsif ($hash =~ m/^[0-9a-fA-F]{40}$/) {
6839                 # blobs defined by non-textual hash id's can be cached
6840                 $expires = "+1d";
6841         }
6842
6843         open my $fd, "-|", git_cmd(), "cat-file", "blob", $hash
6844                 or die_error(500, "Open git-cat-file blob '$hash' failed");
6845
6846         # content-type (can include charset)
6847         $type = blob_contenttype($fd, $file_name, $type);
6848
6849         # "save as" filename, even when no $file_name is given
6850         my $save_as = "$hash";
6851         if (defined $file_name) {
6852                 $save_as = $file_name;
6853         } elsif ($type =~ m/^text\//) {
6854                 $save_as .= '.txt';
6855         }
6856
6857         # With XSS prevention on, blobs of all types except a few known safe
6858         # ones are served with "Content-Disposition: attachment" to make sure
6859         # they don't run in our security domain.  For certain image types,
6860         # blob view writes an <img> tag referring to blob_plain view, and we
6861         # want to be sure not to break that by serving the image as an
6862         # attachment (though Firefox 3 doesn't seem to care).
6863         my $sandbox = $prevent_xss &&
6864                 $type !~ m!^(?:text/[a-z]+|image/(?:gif|png|jpeg))(?:[ ;]|$)!;
6865
6866         # serve text/* as text/plain
6867         if ($prevent_xss &&
6868             ($type =~ m!^text/[a-z]+\b(.*)$! ||
6869              ($type =~ m!^[a-z]+/[a-z]\+xml\b(.*)$! && -T $fd))) {
6870                 my $rest = $1;
6871                 $rest = defined $rest ? $rest : '';
6872                 $type = "text/plain$rest";
6873         }
6874
6875         print $cgi->header(
6876                 -type => $type,
6877                 -expires => $expires,
6878                 -content_disposition =>
6879                         ($sandbox ? 'attachment' : 'inline')
6880                         . '; filename="' . $save_as . '"');
6881         local $/ = undef;
6882         binmode STDOUT, ':raw';
6883         print <$fd>;
6884         binmode STDOUT, ':utf8'; # as set at the beginning of gitweb.cgi
6885         close $fd;
6886 }
6887
6888 sub git_blob {
6889         my $expires;
6890
6891         if (!defined $hash) {
6892                 if (defined $file_name) {
6893                         my $base = $hash_base || git_get_head_hash($project);
6894                         $hash = git_get_hash_by_path($base, $file_name, "blob")
6895                                 or die_error(404, "Cannot find file");
6896                 } else {
6897                         die_error(400, "No file name defined");
6898                 }
6899         } elsif ($hash =~ m/^[0-9a-fA-F]{40}$/) {
6900                 # blobs defined by non-textual hash id's can be cached
6901                 $expires = "+1d";
6902         }
6903
6904         my $have_blame = gitweb_check_feature('blame');
6905         open my $fd, "-|", git_cmd(), "cat-file", "blob", $hash
6906                 or die_error(500, "Couldn't cat $file_name, $hash");
6907         my $mimetype = blob_mimetype($fd, $file_name);
6908         # use 'blob_plain' (aka 'raw') view for files that cannot be displayed
6909         if ($mimetype !~ m!^(?:text/|image/(?:gif|png|jpeg)$)! && -B $fd) {
6910                 close $fd;
6911                 return git_blob_plain($mimetype);
6912         }
6913         # we can have blame only for text/* mimetype
6914         $have_blame &&= ($mimetype =~ m!^text/!);
6915
6916         my $highlight = gitweb_check_feature('highlight');
6917         my $syntax = guess_file_syntax($highlight, $mimetype, $file_name);
6918         $fd = run_highlighter($fd, $highlight, $syntax)
6919                 if $syntax;
6920
6921         git_header_html(undef, $expires);
6922         my $formats_nav = '';
6923         if (defined $hash_base && (my %co = parse_commit($hash_base))) {
6924                 if (defined $file_name) {
6925                         if ($have_blame) {
6926                                 $formats_nav .=
6927                                         $cgi->a({-href => href(action=>"blame", -replay=>1)},
6928                                                 "blame") .
6929                                         " | ";
6930                         }
6931                         $formats_nav .=
6932                                 $cgi->a({-href => href(action=>"history", -replay=>1)},
6933                                         "history") .
6934                                 " | " .
6935                                 $cgi->a({-href => href(action=>"blob_plain", -replay=>1)},
6936                                         "raw") .
6937                                 " | " .
6938                                 $cgi->a({-href => href(action=>"blob",
6939                                                        hash_base=>"HEAD", file_name=>$file_name)},
6940                                         "HEAD");
6941                 } else {
6942                         $formats_nav .=
6943                                 $cgi->a({-href => href(action=>"blob_plain", -replay=>1)},
6944                                         "raw");
6945                 }
6946                 git_print_page_nav('','', $hash_base,$co{'tree'},$hash_base, $formats_nav);
6947                 git_print_header_div('commit', esc_html($co{'title'}), $hash_base);
6948         } else {
6949                 print "<div class=\"page_nav\">\n" .
6950                       "<br/><br/></div>\n" .
6951                       "<div class=\"title\">".esc_html($hash)."</div>\n";
6952         }
6953         git_print_page_path($file_name, "blob", $hash_base);
6954         print "<div class=\"page_body\">\n";
6955         if ($mimetype =~ m!^image/!) {
6956                 print qq!<img type="!.esc_attr($mimetype).qq!"!;
6957                 if ($file_name) {
6958                         print qq! alt="!.esc_attr($file_name).qq!" title="!.esc_attr($file_name).qq!"!;
6959                 }
6960                 print qq! src="! .
6961                       href(action=>"blob_plain", hash=>$hash,
6962                            hash_base=>$hash_base, file_name=>$file_name) .
6963                       qq!" />\n!;
6964         } else {
6965                 my $nr;
6966                 while (my $line = <$fd>) {
6967                         chomp $line;
6968                         $nr++;
6969                         $line = untabify($line);
6970                         printf qq!<div class="pre"><a id="l%i" href="%s#l%i" class="linenr">%4i</a> %s</div>\n!,
6971                                $nr, esc_attr(href(-replay => 1)), $nr, $nr,
6972                                $syntax ? sanitize($line) : esc_html($line, -nbsp=>1);
6973                 }
6974         }
6975         close $fd
6976                 or print "Reading blob failed.\n";
6977         print "</div>";
6978         git_footer_html();
6979 }
6980
6981 sub git_tree {
6982         if (!defined $hash_base) {
6983                 $hash_base = "HEAD";
6984         }
6985         if (!defined $hash) {
6986                 if (defined $file_name) {
6987                         $hash = git_get_hash_by_path($hash_base, $file_name, "tree");
6988                 } else {
6989                         $hash = $hash_base;
6990                 }
6991         }
6992         die_error(404, "No such tree") unless defined($hash);
6993
6994         my $show_sizes = gitweb_check_feature('show-sizes');
6995         my $have_blame = gitweb_check_feature('blame');
6996
6997         my @entries = ();
6998         {
6999                 local $/ = "\0";
7000                 open my $fd, "-|", git_cmd(), "ls-tree", '-z',
7001                         ($show_sizes ? '-l' : ()), @extra_options, $hash
7002                         or die_error(500, "Open git-ls-tree failed");
7003                 @entries = map { chomp; $_ } <$fd>;
7004                 close $fd
7005                         or die_error(404, "Reading tree failed");
7006         }
7007
7008         my $refs = git_get_references();
7009         my $ref = format_ref_marker($refs, $hash_base);
7010         git_header_html();
7011         my $basedir = '';
7012         if (defined $hash_base && (my %co = parse_commit($hash_base))) {
7013                 my @views_nav = ();
7014                 if (defined $file_name) {
7015                         push @views_nav,
7016                                 $cgi->a({-href => href(action=>"history", -replay=>1)},
7017                                         "history"),
7018                                 $cgi->a({-href => href(action=>"tree",
7019                                                        hash_base=>"HEAD", file_name=>$file_name)},
7020                                         "HEAD"),
7021                 }
7022                 my $snapshot_links = format_snapshot_links($hash);
7023                 if (defined $snapshot_links) {
7024                         # FIXME: Should be available when we have no hash base as well.
7025                         push @views_nav, $snapshot_links;
7026                 }
7027                 git_print_page_nav('tree','', $hash_base, undef, undef,
7028                                    join(' | ', @views_nav));
7029                 git_print_header_div('commit', esc_html($co{'title'}) . $ref, $hash_base);
7030         } else {
7031                 undef $hash_base;
7032                 print "<div class=\"page_nav\">\n";
7033                 print "<br/><br/></div>\n";
7034                 print "<div class=\"title\">".esc_html($hash)."</div>\n";
7035         }
7036         if (defined $file_name) {
7037                 $basedir = $file_name;
7038                 if ($basedir ne '' && substr($basedir, -1) ne '/') {
7039                         $basedir .= '/';
7040                 }
7041                 git_print_page_path($file_name, 'tree', $hash_base);
7042         }
7043         print "<div class=\"page_body\">\n";
7044         print "<table class=\"tree\">\n";
7045         my $alternate = 1;
7046         # '..' (top directory) link if possible
7047         if (defined $hash_base &&
7048             defined $file_name && $file_name =~ m![^/]+$!) {
7049                 if ($alternate) {
7050                         print "<tr class=\"dark\">\n";
7051                 } else {
7052                         print "<tr class=\"light\">\n";
7053                 }
7054                 $alternate ^= 1;
7055
7056                 my $up = $file_name;
7057                 $up =~ s!/?[^/]+$!!;
7058                 undef $up unless $up;
7059                 # based on git_print_tree_entry
7060                 print '<td class="mode">' . mode_str('040000') . "</td>\n";
7061                 print '<td class="size">&nbsp;</td>'."\n" if $show_sizes;
7062                 print '<td class="list">';
7063                 print $cgi->a({-href => href(action=>"tree",
7064                                              hash_base=>$hash_base,
7065                                              file_name=>$up)},
7066                               "..");
7067                 print "</td>\n";
7068                 print "<td class=\"link\"></td>\n";
7069
7070                 print "</tr>\n";
7071         }
7072         foreach my $line (@entries) {
7073                 my %t = parse_ls_tree_line($line, -z => 1, -l => $show_sizes);
7074
7075                 if ($alternate) {
7076                         print "<tr class=\"dark\">\n";
7077                 } else {
7078                         print "<tr class=\"light\">\n";
7079                 }
7080                 $alternate ^= 1;
7081
7082                 git_print_tree_entry(\%t, $basedir, $hash_base, $have_blame);
7083
7084                 print "</tr>\n";
7085         }
7086         print "</table>\n" .
7087               "</div>";
7088         git_footer_html();
7089 }
7090
7091 sub snapshot_name {
7092         my ($project, $hash) = @_;
7093
7094         # path/to/project.git  -> project
7095         # path/to/project/.git -> project
7096         my $name = to_utf8($project);
7097         $name =~ s,([^/])/*\.git$,$1,;
7098         $name = basename($name);
7099         # sanitize name
7100         $name =~ s/[[:cntrl:]]/?/g;
7101
7102         my $ver = $hash;
7103         if ($hash =~ /^[0-9a-fA-F]+$/) {
7104                 # shorten SHA-1 hash
7105                 my $full_hash = git_get_full_hash($project, $hash);
7106                 if ($full_hash =~ /^$hash/ && length($hash) > 7) {
7107                         $ver = git_get_short_hash($project, $hash);
7108                 }
7109         } elsif ($hash =~ m!^refs/tags/(.*)$!) {
7110                 # tags don't need shortened SHA-1 hash
7111                 $ver = $1;
7112         } else {
7113                 # branches and other need shortened SHA-1 hash
7114                 if ($hash =~ m!^refs/(?:heads|remotes)/(.*)$!) {
7115                         $ver = $1;
7116                 }
7117                 $ver .= '-' . git_get_short_hash($project, $hash);
7118         }
7119         # in case of hierarchical branch names
7120         $ver =~ s!/!.!g;
7121
7122         # name = project-version_string
7123         $name = "$name-$ver";
7124
7125         return wantarray ? ($name, $name) : $name;
7126 }
7127
7128 sub exit_if_unmodified_since {
7129         my ($latest_epoch) = @_;
7130         our $cgi;
7131
7132         my $if_modified = $cgi->http('IF_MODIFIED_SINCE');
7133         if (defined $if_modified) {
7134                 my $since;
7135                 if (eval { require HTTP::Date; 1; }) {
7136                         $since = HTTP::Date::str2time($if_modified);
7137                 } elsif (eval { require Time::ParseDate; 1; }) {
7138                         $since = Time::ParseDate::parsedate($if_modified, GMT => 1);
7139                 }
7140                 if (defined $since && $latest_epoch <= $since) {
7141                         my %latest_date = parse_date($latest_epoch);
7142                         print $cgi->header(
7143                                 -last_modified => $latest_date{'rfc2822'},
7144                                 -status => '304 Not Modified');
7145                         goto DONE_GITWEB;
7146                 }
7147         }
7148 }
7149
7150 sub git_snapshot {
7151         my $format = $input_params{'snapshot_format'};
7152         if (!@snapshot_fmts) {
7153                 die_error(403, "Snapshots not allowed");
7154         }
7155         # default to first supported snapshot format
7156         $format ||= $snapshot_fmts[0];
7157         if ($format !~ m/^[a-z0-9]+$/) {
7158                 die_error(400, "Invalid snapshot format parameter");
7159         } elsif (!exists($known_snapshot_formats{$format})) {
7160                 die_error(400, "Unknown snapshot format");
7161         } elsif ($known_snapshot_formats{$format}{'disabled'}) {
7162                 die_error(403, "Snapshot format not allowed");
7163         } elsif (!grep($_ eq $format, @snapshot_fmts)) {
7164                 die_error(403, "Unsupported snapshot format");
7165         }
7166
7167         my $type = git_get_type("$hash^{}");
7168         if (!$type) {
7169                 die_error(404, 'Object does not exist');
7170         }  elsif ($type eq 'blob') {
7171                 die_error(400, 'Object is not a tree-ish');
7172         }
7173
7174         my ($name, $prefix) = snapshot_name($project, $hash);
7175         my $filename = "$name$known_snapshot_formats{$format}{'suffix'}";
7176
7177         my %co = parse_commit($hash);
7178         exit_if_unmodified_since($co{'committer_epoch'}) if %co;
7179
7180         my $cmd = quote_command(
7181                 git_cmd(), 'archive',
7182                 "--format=$known_snapshot_formats{$format}{'format'}",
7183                 "--prefix=$prefix/", $hash);
7184         if (exists $known_snapshot_formats{$format}{'compressor'}) {
7185                 $cmd .= ' | ' . quote_command(@{$known_snapshot_formats{$format}{'compressor'}});
7186         }
7187
7188         $filename =~ s/(["\\])/\\$1/g;
7189         my %latest_date;
7190         if (%co) {
7191                 %latest_date = parse_date($co{'committer_epoch'}, $co{'committer_tz'});
7192         }
7193
7194         print $cgi->header(
7195                 -type => $known_snapshot_formats{$format}{'type'},
7196                 -content_disposition => 'inline; filename="' . $filename . '"',
7197                 %co ? (-last_modified => $latest_date{'rfc2822'}) : (),
7198                 -status => '200 OK');
7199
7200         open my $fd, "-|", $cmd
7201                 or die_error(500, "Execute git-archive failed");
7202         binmode STDOUT, ':raw';
7203         print <$fd>;
7204         binmode STDOUT, ':utf8'; # as set at the beginning of gitweb.cgi
7205         close $fd;
7206 }
7207
7208 sub git_log_generic {
7209         my ($fmt_name, $body_subr, $base, $parent, $file_name, $file_hash) = @_;
7210
7211         my $head = git_get_head_hash($project);
7212         if (!defined $base) {
7213                 $base = $head;
7214         }
7215         if (!defined $page) {
7216                 $page = 0;
7217         }
7218         my $refs = git_get_references();
7219
7220         my $commit_hash = $base;
7221         if (defined $parent) {
7222                 $commit_hash = "$parent..$base";
7223         }
7224         my @commitlist =
7225                 parse_commits($commit_hash, 101, (100 * $page),
7226                               defined $file_name ? ($file_name, "--full-history") : ());
7227
7228         my $ftype;
7229         if (!defined $file_hash && defined $file_name) {
7230                 # some commits could have deleted file in question,
7231                 # and not have it in tree, but one of them has to have it
7232                 for (my $i = 0; $i < @commitlist; $i++) {
7233                         $file_hash = git_get_hash_by_path($commitlist[$i]{'id'}, $file_name);
7234                         last if defined $file_hash;
7235                 }
7236         }
7237         if (defined $file_hash) {
7238                 $ftype = git_get_type($file_hash);
7239         }
7240         if (defined $file_name && !defined $ftype) {
7241                 die_error(500, "Unknown type of object");
7242         }
7243         my %co;
7244         if (defined $file_name) {
7245                 %co = parse_commit($base)
7246                         or die_error(404, "Unknown commit object");
7247         }
7248
7249
7250         my $paging_nav = format_paging_nav($fmt_name, $page, $#commitlist >= 100);
7251         my $next_link = '';
7252         if ($#commitlist >= 100) {
7253                 $next_link =
7254                         $cgi->a({-href => href(-replay=>1, page=>$page+1),
7255                                  -accesskey => "n", -title => "Alt-n"}, "next");
7256         }
7257         my $patch_max = gitweb_get_feature('patches');
7258         if ($patch_max && !defined $file_name) {
7259                 if ($patch_max < 0 || @commitlist <= $patch_max) {
7260                         $paging_nav .= " &sdot; " .
7261                                 $cgi->a({-href => href(action=>"patches", -replay=>1)},
7262                                         "patches");
7263                 }
7264         }
7265
7266         git_header_html();
7267         git_print_page_nav($fmt_name,'', $hash,$hash,$hash, $paging_nav);
7268         if (defined $file_name) {
7269                 git_print_header_div('commit', esc_html($co{'title'}), $base);
7270         } else {
7271                 git_print_header_div('summary', $project)
7272         }
7273         git_print_page_path($file_name, $ftype, $hash_base)
7274                 if (defined $file_name);
7275
7276         $body_subr->(\@commitlist, 0, 99, $refs, $next_link,
7277                      $file_name, $file_hash, $ftype);
7278
7279         git_footer_html();
7280 }
7281
7282 sub git_log {
7283         git_log_generic('log', \&git_log_body,
7284                         $hash, $hash_parent);
7285 }
7286
7287 sub git_commit {
7288         $hash ||= $hash_base || "HEAD";
7289         my %co = parse_commit($hash)
7290             or die_error(404, "Unknown commit object");
7291
7292         my $parent  = $co{'parent'};
7293         my $parents = $co{'parents'}; # listref
7294
7295         # we need to prepare $formats_nav before any parameter munging
7296         my $formats_nav;
7297         if (!defined $parent) {
7298                 # --root commitdiff
7299                 $formats_nav .= '(initial)';
7300         } elsif (@$parents == 1) {
7301                 # single parent commit
7302                 $formats_nav .=
7303                         '(parent: ' .
7304                         $cgi->a({-href => href(action=>"commit",
7305                                                hash=>$parent)},
7306                                 esc_html(substr($parent, 0, 7))) .
7307                         ')';
7308         } else {
7309                 # merge commit
7310                 $formats_nav .=
7311                         '(merge: ' .
7312                         join(' ', map {
7313                                 $cgi->a({-href => href(action=>"commit",
7314                                                        hash=>$_)},
7315                                         esc_html(substr($_, 0, 7)));
7316                         } @$parents ) .
7317                         ')';
7318         }
7319         if (gitweb_check_feature('patches') && @$parents <= 1) {
7320                 $formats_nav .= " | " .
7321                         $cgi->a({-href => href(action=>"patch", -replay=>1)},
7322                                 "patch");
7323         }
7324
7325         if (!defined $parent) {
7326                 $parent = "--root";
7327         }
7328         my @difftree;
7329         open my $fd, "-|", git_cmd(), "diff-tree", '-r', "--no-commit-id",
7330                 @diff_opts,
7331                 (@$parents <= 1 ? $parent : '-c'),
7332                 $hash, "--"
7333                 or die_error(500, "Open git-diff-tree failed");
7334         @difftree = map { chomp; $_ } <$fd>;
7335         close $fd or die_error(404, "Reading git-diff-tree failed");
7336
7337         # non-textual hash id's can be cached
7338         my $expires;
7339         if ($hash =~ m/^[0-9a-fA-F]{40}$/) {
7340                 $expires = "+1d";
7341         }
7342         my $refs = git_get_references();
7343         my $ref = format_ref_marker($refs, $co{'id'});
7344
7345         git_header_html(undef, $expires);
7346         git_print_page_nav('commit', '',
7347                            $hash, $co{'tree'}, $hash,
7348                            $formats_nav);
7349
7350         if (defined $co{'parent'}) {
7351                 git_print_header_div('commitdiff', esc_html($co{'title'}) . $ref, $hash);
7352         } else {
7353                 git_print_header_div('tree', esc_html($co{'title'}) . $ref, $co{'tree'}, $hash);
7354         }
7355         print "<div class=\"title_text\">\n" .
7356               "<table class=\"object_header\">\n";
7357         git_print_authorship_rows(\%co);
7358         print "<tr><td>commit</td><td class=\"sha1\">$co{'id'}</td></tr>\n";
7359         print "<tr>" .
7360               "<td>tree</td>" .
7361               "<td class=\"sha1\">" .
7362               $cgi->a({-href => href(action=>"tree", hash=>$co{'tree'}, hash_base=>$hash),
7363                        class => "list"}, $co{'tree'}) .
7364               "</td>" .
7365               "<td class=\"link\">" .
7366               $cgi->a({-href => href(action=>"tree", hash=>$co{'tree'}, hash_base=>$hash)},
7367                       "tree");
7368         my $snapshot_links = format_snapshot_links($hash);
7369         if (defined $snapshot_links) {
7370                 print " | " . $snapshot_links;
7371         }
7372         print "</td>" .
7373               "</tr>\n";
7374
7375         foreach my $par (@$parents) {
7376                 print "<tr>" .
7377                       "<td>parent</td>" .
7378                       "<td class=\"sha1\">" .
7379                       $cgi->a({-href => href(action=>"commit", hash=>$par),
7380                                class => "list"}, $par) .
7381                       "</td>" .
7382                       "<td class=\"link\">" .
7383                       $cgi->a({-href => href(action=>"commit", hash=>$par)}, "commit") .
7384                       " | " .
7385                       $cgi->a({-href => href(action=>"commitdiff", hash=>$hash, hash_parent=>$par)}, "diff") .
7386                       "</td>" .
7387                       "</tr>\n";
7388         }
7389         print "</table>".
7390               "</div>\n";
7391
7392         print "<div class=\"page_body\">\n";
7393         git_print_log($co{'comment'});
7394         print "</div>\n";
7395
7396         git_difftree_body(\@difftree, $hash, @$parents);
7397
7398         git_footer_html();
7399 }
7400
7401 sub git_object {
7402         # object is defined by:
7403         # - hash or hash_base alone
7404         # - hash_base and file_name
7405         my $type;
7406
7407         # - hash or hash_base alone
7408         if ($hash || ($hash_base && !defined $file_name)) {
7409                 my $object_id = $hash || $hash_base;
7410
7411                 open my $fd, "-|", quote_command(
7412                         git_cmd(), 'cat-file', '-t', $object_id) . ' 2> /dev/null'
7413                         or die_error(404, "Object does not exist");
7414                 $type = <$fd>;
7415                 chomp $type;
7416                 close $fd
7417                         or die_error(404, "Object does not exist");
7418
7419         # - hash_base and file_name
7420         } elsif ($hash_base && defined $file_name) {
7421                 $file_name =~ s,/+$,,;
7422
7423                 system(git_cmd(), "cat-file", '-e', $hash_base) == 0
7424                         or die_error(404, "Base object does not exist");
7425
7426                 # here errors should not hapen
7427                 open my $fd, "-|", git_cmd(), "ls-tree", $hash_base, "--", $file_name
7428                         or die_error(500, "Open git-ls-tree failed");
7429                 my $line = <$fd>;
7430                 close $fd;
7431
7432                 #'100644 blob 0fa3f3a66fb6a137f6ec2c19351ed4d807070ffa  panic.c'
7433                 unless ($line && $line =~ m/^([0-9]+) (.+) ([0-9a-fA-F]{40})\t/) {
7434                         die_error(404, "File or directory for given base does not exist");
7435                 }
7436                 $type = $2;
7437                 $hash = $3;
7438         } else {
7439                 die_error(400, "Not enough information to find object");
7440         }
7441
7442         print $cgi->redirect(-uri => href(action=>$type, -full=>1,
7443                                           hash=>$hash, hash_base=>$hash_base,
7444                                           file_name=>$file_name),
7445                              -status => '302 Found');
7446 }
7447
7448 sub git_blobdiff {
7449         my $format = shift || 'html';
7450         my $diff_style = $input_params{'diff_style'} || 'inline';
7451
7452         my $fd;
7453         my @difftree;
7454         my %diffinfo;
7455         my $expires;
7456
7457         # preparing $fd and %diffinfo for git_patchset_body
7458         # new style URI
7459         if (defined $hash_base && defined $hash_parent_base) {
7460                 if (defined $file_name) {
7461                         # read raw output
7462                         open $fd, "-|", git_cmd(), "diff-tree", '-r', @diff_opts,
7463                                 $hash_parent_base, $hash_base,
7464                                 "--", (defined $file_parent ? $file_parent : ()), $file_name
7465                                 or die_error(500, "Open git-diff-tree failed");
7466                         @difftree = map { chomp; $_ } <$fd>;
7467                         close $fd
7468                                 or die_error(404, "Reading git-diff-tree failed");
7469                         @difftree
7470                                 or die_error(404, "Blob diff not found");
7471
7472                 } elsif (defined $hash &&
7473                          $hash =~ /[0-9a-fA-F]{40}/) {
7474                         # try to find filename from $hash
7475
7476                         # read filtered raw output
7477                         open $fd, "-|", git_cmd(), "diff-tree", '-r', @diff_opts,
7478                                 $hash_parent_base, $hash_base, "--"
7479                                 or die_error(500, "Open git-diff-tree failed");
7480                         @difftree =
7481                                 # ':100644 100644 03b21826... 3b93d5e7... M     ls-files.c'
7482                                 # $hash == to_id
7483                                 grep { /^:[0-7]{6} [0-7]{6} [0-9a-fA-F]{40} $hash/ }
7484                                 map { chomp; $_ } <$fd>;
7485                         close $fd
7486                                 or die_error(404, "Reading git-diff-tree failed");
7487                         @difftree
7488                                 or die_error(404, "Blob diff not found");
7489
7490                 } else {
7491                         die_error(400, "Missing one of the blob diff parameters");
7492                 }
7493
7494                 if (@difftree > 1) {
7495                         die_error(400, "Ambiguous blob diff specification");
7496                 }
7497
7498                 %diffinfo = parse_difftree_raw_line($difftree[0]);
7499                 $file_parent ||= $diffinfo{'from_file'} || $file_name;
7500                 $file_name   ||= $diffinfo{'to_file'};
7501
7502                 $hash_parent ||= $diffinfo{'from_id'};
7503                 $hash        ||= $diffinfo{'to_id'};
7504
7505                 # non-textual hash id's can be cached
7506                 if ($hash_base =~ m/^[0-9a-fA-F]{40}$/ &&
7507                     $hash_parent_base =~ m/^[0-9a-fA-F]{40}$/) {
7508                         $expires = '+1d';
7509                 }
7510
7511                 # open patch output
7512                 open $fd, "-|", git_cmd(), "diff-tree", '-r', @diff_opts,
7513                         '-p', ($format eq 'html' ? "--full-index" : ()),
7514                         $hash_parent_base, $hash_base,
7515                         "--", (defined $file_parent ? $file_parent : ()), $file_name
7516                         or die_error(500, "Open git-diff-tree failed");
7517         }
7518
7519         # old/legacy style URI -- not generated anymore since 1.4.3.
7520         if (!%diffinfo) {
7521                 die_error('404 Not Found', "Missing one of the blob diff parameters")
7522         }
7523
7524         # header
7525         if ($format eq 'html') {
7526                 my $formats_nav =
7527                         $cgi->a({-href => href(action=>"blobdiff_plain", -replay=>1)},
7528                                 "raw");
7529                 $formats_nav .= diff_style_nav($diff_style);
7530                 git_header_html(undef, $expires);
7531                 if (defined $hash_base && (my %co = parse_commit($hash_base))) {
7532                         git_print_page_nav('','', $hash_base,$co{'tree'},$hash_base, $formats_nav);
7533                         git_print_header_div('commit', esc_html($co{'title'}), $hash_base);
7534                 } else {
7535                         print "<div class=\"page_nav\"><br/>$formats_nav<br/></div>\n";
7536                         print "<div class=\"title\">".esc_html("$hash vs $hash_parent")."</div>\n";
7537                 }
7538                 if (defined $file_name) {
7539                         git_print_page_path($file_name, "blob", $hash_base);
7540                 } else {
7541                         print "<div class=\"page_path\"></div>\n";
7542                 }
7543
7544         } elsif ($format eq 'plain') {
7545                 print $cgi->header(
7546                         -type => 'text/plain',
7547                         -charset => 'utf-8',
7548                         -expires => $expires,
7549                         -content_disposition => 'inline; filename="' . "$file_name" . '.patch"');
7550
7551                 print "X-Git-Url: " . $cgi->self_url() . "\n\n";
7552
7553         } else {
7554                 die_error(400, "Unknown blobdiff format");
7555         }
7556
7557         # patch
7558         if ($format eq 'html') {
7559                 print "<div class=\"page_body\">\n";
7560
7561                 git_patchset_body($fd, $diff_style,
7562                                   [ \%diffinfo ], $hash_base, $hash_parent_base);
7563                 close $fd;
7564
7565                 print "</div>\n"; # class="page_body"
7566                 git_footer_html();
7567
7568         } else {
7569                 while (my $line = <$fd>) {
7570                         $line =~ s!a/($hash|$hash_parent)!'a/'.esc_path($diffinfo{'from_file'})!eg;
7571                         $line =~ s!b/($hash|$hash_parent)!'b/'.esc_path($diffinfo{'to_file'})!eg;
7572
7573                         print $line;
7574
7575                         last if $line =~ m!^\+\+\+!;
7576                 }
7577                 local $/ = undef;
7578                 print <$fd>;
7579                 close $fd;
7580         }
7581 }
7582
7583 sub git_blobdiff_plain {
7584         git_blobdiff('plain');
7585 }
7586
7587 # assumes that it is added as later part of already existing navigation,
7588 # so it returns "| foo | bar" rather than just "foo | bar"
7589 sub diff_style_nav {
7590         my ($diff_style, $is_combined) = @_;
7591         $diff_style ||= 'inline';
7592
7593         return "" if ($is_combined);
7594
7595         my @styles = (inline => 'inline', 'sidebyside' => 'side by side');
7596         my %styles = @styles;
7597         @styles =
7598                 @styles[ map { $_ * 2 } 0..$#styles/2 ];
7599
7600         return join '',
7601                 map { " | ".$_ }
7602                 map {
7603                         $_ eq $diff_style ? $styles{$_} :
7604                         $cgi->a({-href => href(-replay=>1, diff_style => $_)}, $styles{$_})
7605                 } @styles;
7606 }
7607
7608 sub git_commitdiff {
7609         my %params = @_;
7610         my $format = $params{-format} || 'html';
7611         my $diff_style = $input_params{'diff_style'} || 'inline';
7612
7613         my ($patch_max) = gitweb_get_feature('patches');
7614         if ($format eq 'patch') {
7615                 die_error(403, "Patch view not allowed") unless $patch_max;
7616         }
7617
7618         $hash ||= $hash_base || "HEAD";
7619         my %co = parse_commit($hash)
7620             or die_error(404, "Unknown commit object");
7621
7622         # choose format for commitdiff for merge
7623         if (! defined $hash_parent && @{$co{'parents'}} > 1) {
7624                 $hash_parent = '--cc';
7625         }
7626         # we need to prepare $formats_nav before almost any parameter munging
7627         my $formats_nav;
7628         if ($format eq 'html') {
7629                 $formats_nav =
7630                         $cgi->a({-href => href(action=>"commitdiff_plain", -replay=>1)},
7631                                 "raw");
7632                 if ($patch_max && @{$co{'parents'}} <= 1) {
7633                         $formats_nav .= " | " .
7634                                 $cgi->a({-href => href(action=>"patch", -replay=>1)},
7635                                         "patch");
7636                 }
7637                 $formats_nav .= diff_style_nav($diff_style, @{$co{'parents'}} > 1);
7638
7639                 if (defined $hash_parent &&
7640                     $hash_parent ne '-c' && $hash_parent ne '--cc') {
7641                         # commitdiff with two commits given
7642                         my $hash_parent_short = $hash_parent;
7643                         if ($hash_parent =~ m/^[0-9a-fA-F]{40}$/) {
7644                                 $hash_parent_short = substr($hash_parent, 0, 7);
7645                         }
7646                         $formats_nav .=
7647                                 ' (from';
7648                         for (my $i = 0; $i < @{$co{'parents'}}; $i++) {
7649                                 if ($co{'parents'}[$i] eq $hash_parent) {
7650                                         $formats_nav .= ' parent ' . ($i+1);
7651                                         last;
7652                                 }
7653                         }
7654                         $formats_nav .= ': ' .
7655                                 $cgi->a({-href => href(-replay=>1,
7656                                                        hash=>$hash_parent, hash_base=>undef)},
7657                                         esc_html($hash_parent_short)) .
7658                                 ')';
7659                 } elsif (!$co{'parent'}) {
7660                         # --root commitdiff
7661                         $formats_nav .= ' (initial)';
7662                 } elsif (scalar @{$co{'parents'}} == 1) {
7663                         # single parent commit
7664                         $formats_nav .=
7665                                 ' (parent: ' .
7666                                 $cgi->a({-href => href(-replay=>1,
7667                                                        hash=>$co{'parent'}, hash_base=>undef)},
7668                                         esc_html(substr($co{'parent'}, 0, 7))) .
7669                                 ')';
7670                 } else {
7671                         # merge commit
7672                         if ($hash_parent eq '--cc') {
7673                                 $formats_nav .= ' | ' .
7674                                         $cgi->a({-href => href(-replay=>1,
7675                                                                hash=>$hash, hash_parent=>'-c')},
7676                                                 'combined');
7677                         } else { # $hash_parent eq '-c'
7678                                 $formats_nav .= ' | ' .
7679                                         $cgi->a({-href => href(-replay=>1,
7680                                                                hash=>$hash, hash_parent=>'--cc')},
7681                                                 'compact');
7682                         }
7683                         $formats_nav .=
7684                                 ' (merge: ' .
7685                                 join(' ', map {
7686                                         $cgi->a({-href => href(-replay=>1,
7687                                                                hash=>$_, hash_base=>undef)},
7688                                                 esc_html(substr($_, 0, 7)));
7689                                 } @{$co{'parents'}} ) .
7690                                 ')';
7691                 }
7692         }
7693
7694         my $hash_parent_param = $hash_parent;
7695         if (!defined $hash_parent_param) {
7696                 # --cc for multiple parents, --root for parentless
7697                 $hash_parent_param =
7698                         @{$co{'parents'}} > 1 ? '--cc' : $co{'parent'} || '--root';
7699         }
7700
7701         # read commitdiff
7702         my $fd;
7703         my @difftree;
7704         if ($format eq 'html') {
7705                 open $fd, "-|", git_cmd(), "diff-tree", '-r', @diff_opts,
7706                         "--no-commit-id", "--patch-with-raw", "--full-index",
7707                         $hash_parent_param, $hash, "--"
7708                         or die_error(500, "Open git-diff-tree failed");
7709
7710                 while (my $line = <$fd>) {
7711                         chomp $line;
7712                         # empty line ends raw part of diff-tree output
7713                         last unless $line;
7714                         push @difftree, scalar parse_difftree_raw_line($line);
7715                 }
7716
7717         } elsif ($format eq 'plain') {
7718                 open $fd, "-|", git_cmd(), "diff-tree", '-r', @diff_opts,
7719                         '-p', $hash_parent_param, $hash, "--"
7720                         or die_error(500, "Open git-diff-tree failed");
7721         } elsif ($format eq 'patch') {
7722                 # For commit ranges, we limit the output to the number of
7723                 # patches specified in the 'patches' feature.
7724                 # For single commits, we limit the output to a single patch,
7725                 # diverging from the git-format-patch default.
7726                 my @commit_spec = ();
7727                 if ($hash_parent) {
7728                         if ($patch_max > 0) {
7729                                 push @commit_spec, "-$patch_max";
7730                         }
7731                         push @commit_spec, '-n', "$hash_parent..$hash";
7732                 } else {
7733                         if ($params{-single}) {
7734                                 push @commit_spec, '-1';
7735                         } else {
7736                                 if ($patch_max > 0) {
7737                                         push @commit_spec, "-$patch_max";
7738                                 }
7739                                 push @commit_spec, "-n";
7740                         }
7741                         push @commit_spec, '--root', $hash;
7742                 }
7743                 open $fd, "-|", git_cmd(), "format-patch", @diff_opts,
7744                         '--encoding=utf8', '--stdout', @commit_spec
7745                         or die_error(500, "Open git-format-patch failed");
7746         } else {
7747                 die_error(400, "Unknown commitdiff format");
7748         }
7749
7750         # non-textual hash id's can be cached
7751         my $expires;
7752         if ($hash =~ m/^[0-9a-fA-F]{40}$/) {
7753                 $expires = "+1d";
7754         }
7755
7756         # write commit message
7757         if ($format eq 'html') {
7758                 my $refs = git_get_references();
7759                 my $ref = format_ref_marker($refs, $co{'id'});
7760
7761                 git_header_html(undef, $expires);
7762                 git_print_page_nav('commitdiff','', $hash,$co{'tree'},$hash, $formats_nav);
7763                 git_print_header_div('commit', esc_html($co{'title'}) . $ref, $hash);
7764                 print "<div class=\"title_text\">\n" .
7765                       "<table class=\"object_header\">\n";
7766                 git_print_authorship_rows(\%co);
7767                 print "</table>".
7768                       "</div>\n";
7769                 print "<div class=\"page_body\">\n";
7770                 if (@{$co{'comment'}} > 1) {
7771                         print "<div class=\"log\">\n";
7772                         git_print_log($co{'comment'}, -final_empty_line=> 1, -remove_title => 1);
7773                         print "</div>\n"; # class="log"
7774                 }
7775
7776         } elsif ($format eq 'plain') {
7777                 my $refs = git_get_references("tags");
7778                 my $tagname = git_get_rev_name_tags($hash);
7779                 my $filename = basename($project) . "-$hash.patch";
7780
7781                 print $cgi->header(
7782                         -type => 'text/plain',
7783                         -charset => 'utf-8',
7784                         -expires => $expires,
7785                         -content_disposition => 'inline; filename="' . "$filename" . '"');
7786                 my %ad = parse_date($co{'author_epoch'}, $co{'author_tz'});
7787                 print "From: " . to_utf8($co{'author'}) . "\n";
7788                 print "Date: $ad{'rfc2822'} ($ad{'tz_local'})\n";
7789                 print "Subject: " . to_utf8($co{'title'}) . "\n";
7790
7791                 print "X-Git-Tag: $tagname\n" if $tagname;
7792                 print "X-Git-Url: " . $cgi->self_url() . "\n\n";
7793
7794                 foreach my $line (@{$co{'comment'}}) {
7795                         print to_utf8($line) . "\n";
7796                 }
7797                 print "---\n\n";
7798         } elsif ($format eq 'patch') {
7799                 my $filename = basename($project) . "-$hash.patch";
7800
7801                 print $cgi->header(
7802                         -type => 'text/plain',
7803                         -charset => 'utf-8',
7804                         -expires => $expires,
7805                         -content_disposition => 'inline; filename="' . "$filename" . '"');
7806         }
7807
7808         # write patch
7809         if ($format eq 'html') {
7810                 my $use_parents = !defined $hash_parent ||
7811                         $hash_parent eq '-c' || $hash_parent eq '--cc';
7812                 git_difftree_body(\@difftree, $hash,
7813                                   $use_parents ? @{$co{'parents'}} : $hash_parent);
7814                 print "<br/>\n";
7815
7816                 git_patchset_body($fd, $diff_style,
7817                                   \@difftree, $hash,
7818                                   $use_parents ? @{$co{'parents'}} : $hash_parent);
7819                 close $fd;
7820                 print "</div>\n"; # class="page_body"
7821                 git_footer_html();
7822
7823         } elsif ($format eq 'plain') {
7824                 local $/ = undef;
7825                 print <$fd>;
7826                 close $fd
7827                         or print "Reading git-diff-tree failed\n";
7828         } elsif ($format eq 'patch') {
7829                 local $/ = undef;
7830                 print <$fd>;
7831                 close $fd
7832                         or print "Reading git-format-patch failed\n";
7833         }
7834 }
7835
7836 sub git_commitdiff_plain {
7837         git_commitdiff(-format => 'plain');
7838 }
7839
7840 # format-patch-style patches
7841 sub git_patch {
7842         git_commitdiff(-format => 'patch', -single => 1);
7843 }
7844
7845 sub git_patches {
7846         git_commitdiff(-format => 'patch');
7847 }
7848
7849 sub git_history {
7850         git_log_generic('history', \&git_history_body,
7851                         $hash_base, $hash_parent_base,
7852                         $file_name, $hash);
7853 }
7854
7855 sub git_search {
7856         $searchtype ||= 'commit';
7857
7858         # check if appropriate features are enabled
7859         gitweb_check_feature('search')
7860                 or die_error(403, "Search is disabled");
7861         if ($searchtype eq 'pickaxe') {
7862                 # pickaxe may take all resources of your box and run for several minutes
7863                 # with every query - so decide by yourself how public you make this feature
7864                 gitweb_check_feature('pickaxe')
7865                         or die_error(403, "Pickaxe search is disabled");
7866         }
7867         if ($searchtype eq 'grep') {
7868                 # grep search might be potentially CPU-intensive, too
7869                 gitweb_check_feature('grep')
7870                         or die_error(403, "Grep search is disabled");
7871         }
7872
7873         if (!defined $searchtext) {
7874                 die_error(400, "Text field is empty");
7875         }
7876         if (!defined $hash) {
7877                 $hash = git_get_head_hash($project);
7878         }
7879         my %co = parse_commit($hash);
7880         if (!%co) {
7881                 die_error(404, "Unknown commit object");
7882         }
7883         if (!defined $page) {
7884                 $page = 0;
7885         }
7886
7887         if ($searchtype eq 'commit' ||
7888             $searchtype eq 'author' ||
7889             $searchtype eq 'committer') {
7890                 git_search_message(%co);
7891         } elsif ($searchtype eq 'pickaxe') {
7892                 git_search_changes(%co);
7893         } elsif ($searchtype eq 'grep') {
7894                 git_search_files(%co);
7895         } else {
7896                 die_error(400, "Unknown search type");
7897         }
7898 }
7899
7900 sub git_search_help {
7901         git_header_html();
7902         git_print_page_nav('','', $hash,$hash,$hash);
7903         print <<EOT;
7904 <p><strong>Pattern</strong> is by default a normal string that is matched precisely (but without
7905 regard to case, except in the case of pickaxe). However, when you check the <em>re</em> checkbox,
7906 the pattern entered is recognized as the POSIX extended
7907 <a href="http://en.wikipedia.org/wiki/Regular_expression">regular expression</a> (also case
7908 insensitive).</p>
7909 <dl>
7910 <dt><b>commit</b></dt>
7911 <dd>The commit messages and authorship information will be scanned for the given pattern.</dd>
7912 EOT
7913         my $have_grep = gitweb_check_feature('grep');
7914         if ($have_grep) {
7915                 print <<EOT;
7916 <dt><b>grep</b></dt>
7917 <dd>All files in the currently selected tree (HEAD unless you are explicitly browsing
7918     a different one) are searched for the given pattern. On large trees, this search can take
7919 a while and put some strain on the server, so please use it with some consideration. Note that
7920 due to git-grep peculiarity, currently if regexp mode is turned off, the matches are
7921 case-sensitive.</dd>
7922 EOT
7923         }
7924         print <<EOT;
7925 <dt><b>author</b></dt>
7926 <dd>Name and e-mail of the change author and date of birth of the patch will be scanned for the given pattern.</dd>
7927 <dt><b>committer</b></dt>
7928 <dd>Name and e-mail of the committer and date of commit will be scanned for the given pattern.</dd>
7929 EOT
7930         my $have_pickaxe = gitweb_check_feature('pickaxe');
7931         if ($have_pickaxe) {
7932                 print <<EOT;
7933 <dt><b>pickaxe</b></dt>
7934 <dd>All commits that caused the string to appear or disappear from any file (changes that
7935 added, removed or "modified" the string) will be listed. This search can take a while and
7936 takes a lot of strain on the server, so please use it wisely. Note that since you may be
7937 interested even in changes just changing the case as well, this search is case sensitive.</dd>
7938 EOT
7939         }
7940         print "</dl>\n";
7941         git_footer_html();
7942 }
7943
7944 sub git_shortlog {
7945         git_log_generic('shortlog', \&git_shortlog_body,
7946                         $hash, $hash_parent);
7947 }
7948
7949 ## ......................................................................
7950 ## feeds (RSS, Atom; OPML)
7951
7952 sub git_feed {
7953         my $format = shift || 'atom';
7954         my $have_blame = gitweb_check_feature('blame');
7955
7956         # Atom: http://www.atomenabled.org/developers/syndication/
7957         # RSS:  http://www.notestips.com/80256B3A007F2692/1/NAMO5P9UPQ
7958         if ($format ne 'rss' && $format ne 'atom') {
7959                 die_error(400, "Unknown web feed format");
7960         }
7961
7962         # log/feed of current (HEAD) branch, log of given branch, history of file/directory
7963         my $head = $hash || 'HEAD';
7964         my @commitlist = parse_commits($head, 150, 0, $file_name);
7965
7966         my %latest_commit;
7967         my %latest_date;
7968         my $content_type = "application/$format+xml";
7969         if (defined $cgi->http('HTTP_ACCEPT') &&
7970                  $cgi->Accept('text/xml') > $cgi->Accept($content_type)) {
7971                 # browser (feed reader) prefers text/xml
7972                 $content_type = 'text/xml';
7973         }
7974         if (defined($commitlist[0])) {
7975                 %latest_commit = %{$commitlist[0]};
7976                 my $latest_epoch = $latest_commit{'committer_epoch'};
7977                 exit_if_unmodified_since($latest_epoch);
7978                 %latest_date = parse_date($latest_epoch, $latest_commit{'comitter_tz'});
7979         }
7980         print $cgi->header(
7981                 -type => $content_type,
7982                 -charset => 'utf-8',
7983                 %latest_date ? (-last_modified => $latest_date{'rfc2822'}) : (),
7984                 -status => '200 OK');
7985
7986         # Optimization: skip generating the body if client asks only
7987         # for Last-Modified date.
7988         return if ($cgi->request_method() eq 'HEAD');
7989
7990         # header variables
7991         my $title = "$site_name - $project/$action";
7992         my $feed_type = 'log';
7993         if (defined $hash) {
7994                 $title .= " - '$hash'";
7995                 $feed_type = 'branch log';
7996                 if (defined $file_name) {
7997                         $title .= " :: $file_name";
7998                         $feed_type = 'history';
7999                 }
8000         } elsif (defined $file_name) {
8001                 $title .= " - $file_name";
8002                 $feed_type = 'history';
8003         }
8004         $title .= " $feed_type";
8005         my $descr = git_get_project_description($project);
8006         if (defined $descr) {
8007                 $descr = esc_html($descr);
8008         } else {
8009                 $descr = "$project " .
8010                          ($format eq 'rss' ? 'RSS' : 'Atom') .
8011                          " feed";
8012         }
8013         my $owner = git_get_project_owner($project);
8014         $owner = esc_html($owner);
8015
8016         #header
8017         my $alt_url;
8018         if (defined $file_name) {
8019                 $alt_url = href(-full=>1, action=>"history", hash=>$hash, file_name=>$file_name);
8020         } elsif (defined $hash) {
8021                 $alt_url = href(-full=>1, action=>"log", hash=>$hash);
8022         } else {
8023                 $alt_url = href(-full=>1, action=>"summary");
8024         }
8025         print qq!<?xml version="1.0" encoding="utf-8"?>\n!;
8026         if ($format eq 'rss') {
8027                 print <<XML;
8028 <rss version="2.0" xmlns:content="http://purl.org/rss/1.0/modules/content/">
8029 <channel>
8030 XML
8031                 print "<title>$title</title>\n" .
8032                       "<link>$alt_url</link>\n" .
8033                       "<description>$descr</description>\n" .
8034                       "<language>en</language>\n" .
8035                       # project owner is responsible for 'editorial' content
8036                       "<managingEditor>$owner</managingEditor>\n";
8037                 if (defined $logo || defined $favicon) {
8038                         # prefer the logo to the favicon, since RSS
8039                         # doesn't allow both
8040                         my $img = esc_url($logo || $favicon);
8041                         print "<image>\n" .
8042                               "<url>$img</url>\n" .
8043                               "<title>$title</title>\n" .
8044                               "<link>$alt_url</link>\n" .
8045                               "</image>\n";
8046                 }
8047                 if (%latest_date) {
8048                         print "<pubDate>$latest_date{'rfc2822'}</pubDate>\n";
8049                         print "<lastBuildDate>$latest_date{'rfc2822'}</lastBuildDate>\n";
8050                 }
8051                 print "<generator>gitweb v.$version/$git_version</generator>\n";
8052         } elsif ($format eq 'atom') {
8053                 print <<XML;
8054 <feed xmlns="http://www.w3.org/2005/Atom">
8055 XML
8056                 print "<title>$title</title>\n" .
8057                       "<subtitle>$descr</subtitle>\n" .
8058                       '<link rel="alternate" type="text/html" href="' .
8059                       $alt_url . '" />' . "\n" .
8060                       '<link rel="self" type="' . $content_type . '" href="' .
8061                       $cgi->self_url() . '" />' . "\n" .
8062                       "<id>" . href(-full=>1) . "</id>\n" .
8063                       # use project owner for feed author
8064                       "<author><name>$owner</name></author>\n";
8065                 if (defined $favicon) {
8066                         print "<icon>" . esc_url($favicon) . "</icon>\n";
8067                 }
8068                 if (defined $logo) {
8069                         # not twice as wide as tall: 72 x 27 pixels
8070                         print "<logo>" . esc_url($logo) . "</logo>\n";
8071                 }
8072                 if (! %latest_date) {
8073                         # dummy date to keep the feed valid until commits trickle in:
8074                         print "<updated>1970-01-01T00:00:00Z</updated>\n";
8075                 } else {
8076                         print "<updated>$latest_date{'iso-8601'}</updated>\n";
8077                 }
8078                 print "<generator version='$version/$git_version'>gitweb</generator>\n";
8079         }
8080
8081         # contents
8082         for (my $i = 0; $i <= $#commitlist; $i++) {
8083                 my %co = %{$commitlist[$i]};
8084                 my $commit = $co{'id'};
8085                 # we read 150, we always show 30 and the ones more recent than 48 hours
8086                 if (($i >= 20) && ((time - $co{'author_epoch'}) > 48*60*60)) {
8087                         last;
8088                 }
8089                 my %cd = parse_date($co{'author_epoch'}, $co{'author_tz'});
8090
8091                 # get list of changed files
8092                 open my $fd, "-|", git_cmd(), "diff-tree", '-r', @diff_opts,
8093                         $co{'parent'} || "--root",
8094                         $co{'id'}, "--", (defined $file_name ? $file_name : ())
8095                         or next;
8096                 my @difftree = map { chomp; $_ } <$fd>;
8097                 close $fd
8098                         or next;
8099
8100                 # print element (entry, item)
8101                 my $co_url = href(-full=>1, action=>"commitdiff", hash=>$commit);
8102                 if ($format eq 'rss') {
8103                         print "<item>\n" .
8104                               "<title>" . esc_html($co{'title'}) . "</title>\n" .
8105                               "<author>" . esc_html($co{'author'}) . "</author>\n" .
8106                               "<pubDate>$cd{'rfc2822'}</pubDate>\n" .
8107                               "<guid isPermaLink=\"true\">$co_url</guid>\n" .
8108                               "<link>$co_url</link>\n" .
8109                               "<description>" . esc_html($co{'title'}) . "</description>\n" .
8110                               "<content:encoded>" .
8111                               "<![CDATA[\n";
8112                 } elsif ($format eq 'atom') {
8113                         print "<entry>\n" .
8114                               "<title type=\"html\">" . esc_html($co{'title'}) . "</title>\n" .
8115                               "<updated>$cd{'iso-8601'}</updated>\n" .
8116                               "<author>\n" .
8117                               "  <name>" . esc_html($co{'author_name'}) . "</name>\n";
8118                         if ($co{'author_email'}) {
8119                                 print "  <email>" . esc_html($co{'author_email'}) . "</email>\n";
8120                         }
8121                         print "</author>\n" .
8122                               # use committer for contributor
8123                               "<contributor>\n" .
8124                               "  <name>" . esc_html($co{'committer_name'}) . "</name>\n";
8125                         if ($co{'committer_email'}) {
8126                                 print "  <email>" . esc_html($co{'committer_email'}) . "</email>\n";
8127                         }
8128                         print "</contributor>\n" .
8129                               "<published>$cd{'iso-8601'}</published>\n" .
8130                               "<link rel=\"alternate\" type=\"text/html\" href=\"$co_url\" />\n" .
8131                               "<id>$co_url</id>\n" .
8132                               "<content type=\"xhtml\" xml:base=\"" . esc_url($my_url) . "\">\n" .
8133                               "<div xmlns=\"http://www.w3.org/1999/xhtml\">\n";
8134                 }
8135                 my $comment = $co{'comment'};
8136                 print "<pre>\n";
8137                 foreach my $line (@$comment) {
8138                         $line = esc_html($line);
8139                         print "$line\n";
8140                 }
8141                 print "</pre><ul>\n";
8142                 foreach my $difftree_line (@difftree) {
8143                         my %difftree = parse_difftree_raw_line($difftree_line);
8144                         next if !$difftree{'from_id'};
8145
8146                         my $file = $difftree{'file'} || $difftree{'to_file'};
8147
8148                         print "<li>" .
8149                               "[" .
8150                               $cgi->a({-href => href(-full=>1, action=>"blobdiff",
8151                                                      hash=>$difftree{'to_id'}, hash_parent=>$difftree{'from_id'},
8152                                                      hash_base=>$co{'id'}, hash_parent_base=>$co{'parent'},
8153                                                      file_name=>$file, file_parent=>$difftree{'from_file'}),
8154                                       -title => "diff"}, 'D');
8155                         if ($have_blame) {
8156                                 print $cgi->a({-href => href(-full=>1, action=>"blame",
8157                                                              file_name=>$file, hash_base=>$commit),
8158                                               -title => "blame"}, 'B');
8159                         }
8160                         # if this is not a feed of a file history
8161                         if (!defined $file_name || $file_name ne $file) {
8162                                 print $cgi->a({-href => href(-full=>1, action=>"history",
8163                                                              file_name=>$file, hash=>$commit),
8164                                               -title => "history"}, 'H');
8165                         }
8166                         $file = esc_path($file);
8167                         print "] ".
8168                               "$file</li>\n";
8169                 }
8170                 if ($format eq 'rss') {
8171                         print "</ul>]]>\n" .
8172                               "</content:encoded>\n" .
8173                               "</item>\n";
8174                 } elsif ($format eq 'atom') {
8175                         print "</ul>\n</div>\n" .
8176                               "</content>\n" .
8177                               "</entry>\n";
8178                 }
8179         }
8180
8181         # end of feed
8182         if ($format eq 'rss') {
8183                 print "</channel>\n</rss>\n";
8184         } elsif ($format eq 'atom') {
8185                 print "</feed>\n";
8186         }
8187 }
8188
8189 sub git_rss {
8190         git_feed('rss');
8191 }
8192
8193 sub git_atom {
8194         git_feed('atom');
8195 }
8196
8197 sub git_opml {
8198         my @list = git_get_projects_list($project_filter, $strict_export);
8199         if (!@list) {
8200                 die_error(404, "No projects found");
8201         }
8202
8203         print $cgi->header(
8204                 -type => 'text/xml',
8205                 -charset => 'utf-8',
8206                 -content_disposition => 'inline; filename="opml.xml"');
8207
8208         my $title = esc_html($site_name);
8209         my $filter = " within subdirectory ";
8210         if (defined $project_filter) {
8211                 $filter .= esc_html($project_filter);
8212         } else {
8213                 $filter = "";
8214         }
8215         print <<XML;
8216 <?xml version="1.0" encoding="utf-8"?>
8217 <opml version="1.0">
8218 <head>
8219   <title>$title OPML Export$filter</title>
8220 </head>
8221 <body>
8222 <outline text="git RSS feeds">
8223 XML
8224
8225         foreach my $pr (@list) {
8226                 my %proj = %$pr;
8227                 my $head = git_get_head_hash($proj{'path'});
8228                 if (!defined $head) {
8229                         next;
8230                 }
8231                 $git_dir = "$projectroot/$proj{'path'}";
8232                 my %co = parse_commit($head);
8233                 if (!%co) {
8234                         next;
8235                 }
8236
8237                 my $path = esc_html(chop_str($proj{'path'}, 25, 5));
8238                 my $rss  = href('project' => $proj{'path'}, 'action' => 'rss', -full => 1);
8239                 my $html = href('project' => $proj{'path'}, 'action' => 'summary', -full => 1);
8240                 print "<outline type=\"rss\" text=\"$path\" title=\"$path\" xmlUrl=\"$rss\" htmlUrl=\"$html\"/>\n";
8241         }
8242         print <<XML;
8243 </outline>
8244 </body>
8245 </opml>
8246 XML
8247 }