gitweb/gitweb.perl

   1 #!/usr/bin/perl
   2
   3 # gitweb - simple web interface to track changes in git repositories
   4 #
   5 # (C) 2005-2006, Kay Sievers <kay.sievers@vrfy.org>
   6 # (C) 2005, Christian Gierke
   7 #
   8 # This program is licensed under the GPLv2
   9
  10 use 5.008;
  11 use strict;
  12 use warnings;
  13 use CGI qw(:standard :escapeHTML -nosticky);
  14 use CGI::Util qw(unescape);
  15 use CGI::Carp qw(fatalsToBrowser set_message);
  16 use Encode;
  17 use Fcntl ':mode';
  18 use File::Find qw();
  19 use File::Basename qw(basename);
  20 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                 # $path_info has already been URL-decoded by the web server, but
  58                 # $my_url and $my_uri have not. URL-decode them so we can properly
  59                 # strip $path_info.
  60                 $my_url = unescape($my_url);
  61                 $my_uri = unescape($my_uri);
  62                 if ($my_url =~ s,\Q$path_info\E$,, &&
  63                     $my_uri =~ s,\Q$path_info\E$,, &&
  64                     defined $ENV{'SCRIPT_NAME'}) {
  65                         $base_url = $cgi->url(-base => 1) . $ENV{'SCRIPT_NAME'};
  66                 }
  67         }
  68
  69         # target of the home link on top of all pages
  70         our $home_link = $my_uri || "/";
  71 }
  72
  73 # core git executable to use
  74 # this can just be "git" if your webserver has a sensible PATH
  75 our $GIT = "++GIT_BINDIR++/git";
  76
  77 # absolute fs-path which will be prepended to the project path
  78 #our $projectroot = "/pub/scm";
  79 our $projectroot = "++GITWEB_PROJECTROOT++";
  80
  81 # fs traversing limit for getting project list
  82 # the number is relative to the projectroot
  83 our $project_maxdepth = "++GITWEB_PROJECT_MAXDEPTH++";
  84
  85 # string of the home link on top of all pages
  86 our $home_link_str = "++GITWEB_HOME_LINK_STR++";
  87
  88 # name of your site or organization to appear in page titles
  89 # replace this with something more descriptive for clearer bookmarks
  90 our $site_name = "++GITWEB_SITENAME++"
  91                  || ($ENV{'SERVER_NAME'} || "Untitled") . " Git";
  92
  93 # html snippet to include in the <head> section of each page
  94 our $site_html_head_string = "++GITWEB_SITE_HTML_HEAD_STRING++";
  95 # filename of html text to include at top of each page
  96 our $site_header = "++GITWEB_SITE_HEADER++";
  97 # html text to include at home page
  98 our $home_text = "++GITWEB_HOMETEXT++";
  99 # filename of html text to include at bottom of each page
 100 our $site_footer = "++GITWEB_SITE_FOOTER++";
 101
 102 # URI of stylesheets
 103 our @stylesheets = ("++GITWEB_CSS++");
 104 # URI of a single stylesheet, which can be overridden in GITWEB_CONFIG.
 105 our $stylesheet = undef;
 106 # URI of GIT logo (72x27 size)
 107 our $logo = "++GITWEB_LOGO++";
 108 # URI of GIT favicon, assumed to be image/png type
 109 our $favicon = "++GITWEB_FAVICON++";
 110 # URI of gitweb.js (JavaScript code for gitweb)
 111 our $javascript = "++GITWEB_JS++";
 112
 113 # URI and label (title) of GIT logo link
 114 #our $logo_url = "http://www.kernel.org/pub/software/scm/git/docs/";
 115 #our $logo_label = "git documentation";
 116 our $logo_url = "http://git-scm.com/";
 117 our $logo_label = "git homepage";
 118
 119 # source of projects list
 120 our $projects_list = "++GITWEB_LIST++";
 121
 122 # the width (in characters) of the projects list "Description" column
 123 our $projects_list_description_width = 25;
 124
 125 # group projects by category on the projects list
 126 # (enabled if this variable evaluates to true)
 127 our $projects_list_group_categories = 0;
 128
 129 # default category if none specified
 130 # (leave the empty string for no category)
 131 our $project_list_default_category = "";
 132
 133 # default order of projects list
 134 # valid values are none, project, descr, owner, and age
 135 our $default_projects_order = "project";
 136
 137 # show repository only if this file exists
 138 # (only effective if this variable evaluates to true)
 139 our $export_ok = "++GITWEB_EXPORT_OK++";
 140
 141 # don't generate age column on the projects list page
 142 our $omit_age_column = 0;
 143
 144 # don't generate information about owners of repositories
 145 our $omit_owner=0;
 146
 147 # show repository only if this subroutine returns true
 148 # when given the path to the project, for example:
 149 #    sub { return -e "$_[0]/git-daemon-export-ok"; }
 150 our $export_auth_hook = undef;
 151
 152 # only allow viewing of repositories also shown on the overview page
 153 our $strict_export = "++GITWEB_STRICT_EXPORT++";
 154
 155 # list of git base URLs used for URL to where fetch project from,
 156 # i.e. full URL is "$git_base_url/$project"
 157 our @git_base_url_list = grep { $_ ne '' } ("++GITWEB_BASE_URL++");
 158
 159 # default blob_plain mimetype and default charset for text/plain blob
 160 our $default_blob_plain_mimetype = 'text/plain';
 161 our $default_text_plain_charset  = undef;
 162
 163 # file to use for guessing MIME types before trying /etc/mime.types
 164 # (relative to the current git repository)
 165 our $mimetypes_file = undef;
 166
 167 # assume this charset if line contains non-UTF-8 characters;
 168 # it should be valid encoding (see Encoding::Supported(3pm) for list),
 169 # for which encoding all byte sequences are valid, for example
 170 # 'iso-8859-1' aka 'latin1' (it is decoded without checking, so it
 171 # could be even 'utf-8' for the old behavior)
 172 our $fallback_encoding = 'latin1';
 173
 174 # rename detection options for git-diff and git-diff-tree
 175 # - default is '-M', with the cost proportional to
 176 #   (number of removed files) * (number of new files).
 177 # - more costly is '-C' (which implies '-M'), with the cost proportional to
 178 #   (number of changed files + number of removed files) * (number of new files)
 179 # - even more costly is '-C', '--find-copies-harder' with cost
 180 #   (number of files in the original tree) * (number of new files)
 181 # - one might want to include '-B' option, e.g. '-B', '-M'
 182 our @diff_opts = ('-M'); # taken from git_commit
 183
 184 # Disables features that would allow repository owners to inject script into
 185 # the gitweb domain.
 186 our $prevent_xss = 0;
 187
 188 # Path to the highlight executable to use (must be the one from
 189 # http://www.andre-simon.de due to assumptions about parameters and output).
 190 # Useful if highlight is not installed on your webserver's PATH.
 191 # [Default: highlight]
 192 our $highlight_bin = "++HIGHLIGHT_BIN++";
 193
 194 # information about snapshot formats that gitweb is capable of serving
 195 our %known_snapshot_formats = (
 196         # name => {
 197         #       'display' => display name,
 198         #       'type' => mime type,
 199         #       'suffix' => filename suffix,
 200         #       'format' => --format for git-archive,
 201         #       'compressor' => [compressor command and arguments]
 202         #                       (array reference, optional)
 203         #       'disabled' => boolean (optional)}
 204         #
 205         'tgz' => {
 206                 'display' => 'tar.gz',
 207                 'type' => 'application/x-gzip',
 208                 'suffix' => '.tar.gz',
 209                 'format' => 'tar',
 210                 'compressor' => ['gzip', '-n']},
 211
 212         'tbz2' => {
 213                 'display' => 'tar.bz2',
 214                 'type' => 'application/x-bzip2',
 215                 'suffix' => '.tar.bz2',
 216                 'format' => 'tar',
 217                 'compressor' => ['bzip2']},
 218
 219         'txz' => {
 220                 'display' => 'tar.xz',
 221                 'type' => 'application/x-xz',
 222                 'suffix' => '.tar.xz',
 223                 'format' => 'tar',
 224                 'compressor' => ['xz'],
 225                 'disabled' => 1},
 226
 227         'zip' => {
 228                 'display' => 'zip',
 229                 'type' => 'application/x-zip',
 230                 'suffix' => '.zip',
 231                 'format' => 'zip'},
 232 );
 233
 234 # Aliases so we understand old gitweb.snapshot values in repository
 235 # configuration.
 236 our %known_snapshot_format_aliases = (
 237         'gzip'  => 'tgz',
 238         'bzip2' => 'tbz2',
 239         'xz'    => 'txz',
 240
 241         # backward compatibility: legacy gitweb config support
 242         'x-gzip' => undef, 'gz' => undef,
 243         'x-bzip2' => undef, 'bz2' => undef,
 244         'x-zip' => undef, '' => undef,
 245 );
 246
 247 # Pixel sizes for icons and avatars. If the default font sizes or lineheights
 248 # are changed, it may be appropriate to change these values too via
 249 # $GITWEB_CONFIG.
 250 our %avatar_size = (
 251         'default' => 16,
 252         'double'  => 32
 253 );
 254
 255 # Used to set the maximum load that we will still respond to gitweb queries.
 256 # If server load exceed this value then return "503 server busy" error.
 257 # If gitweb cannot determined server load, it is taken to be 0.
 258 # Leave it undefined (or set to 'undef') to turn off load checking.
 259 our $maxload = 300;
 260
 261 # configuration for 'highlight' (http://www.andre-simon.de/)
 262 # match by basename
 263 our %highlight_basename = (
 264         #'Program' => 'py',
 265         #'Library' => 'py',
 266         'SConstruct' => 'py', # SCons equivalent of Makefile
 267         'Makefile' => 'make',
 268 );
 269 # match by extension
 270 our %highlight_ext = (
 271         # main extensions, defining name of syntax;
 272         # see files in /usr/share/highlight/langDefs/ directory
 273         (map { $_ => $_ } qw(py rb java css js tex bib xml awk bat ini spec tcl sql)),
 274         # alternate extensions, see /etc/highlight/filetypes.conf
 275         (map { $_ => 'c'   } qw(c h)),
 276         (map { $_ => 'sh'  } qw(sh bash zsh ksh)),
 277         (map { $_ => 'cpp' } qw(cpp cxx c++ cc)),
 278         (map { $_ => 'php' } qw(php php3 php4 php5 phps)),
 279         (map { $_ => 'pl'  } qw(pl perl pm)), # perhaps also 'cgi'
 280         (map { $_ => 'make'} qw(make mak mk)),
 281         (map { $_ => 'xml' } qw(xml xhtml html htm)),
 282 );
 283
 284 # You define site-wide feature defaults here; override them with
 285 # $GITWEB_CONFIG as necessary.
 286 our %feature = (
 287         # feature => {
 288         #       'sub' => feature-sub (subroutine),
 289         #       'override' => allow-override (boolean),
 290         #       'default' => [ default options...] (array reference)}
 291         #
 292         # if feature is overridable (it means that allow-override has true value),
 293         # then feature-sub will be called with default options as parameters;
 294         # return value of feature-sub indicates if to enable specified feature
 295         #
 296         # if there is no 'sub' key (no feature-sub), then feature cannot be
 297         # overridden
 298         #
 299         # use gitweb_get_feature(<feature>) to retrieve the <feature> value
 300         # (an array) or gitweb_check_feature(<feature>) to check if <feature>
 301         # is enabled
 302
 303         # Enable the 'blame' blob view, showing the last commit that modified
 304         # each line in the file. This can be very CPU-intensive.
 305
 306         # To enable system wide have in $GITWEB_CONFIG
 307         # $feature{'blame'}{'default'} = [1];
 308         # To have project specific config enable override in $GITWEB_CONFIG
 309         # $feature{'blame'}{'override'} = 1;
 310         # and in project config gitweb.blame = 0|1;
 311         'blame' => {
 312                 'sub' => sub { feature_bool('blame', @_) },
 313                 'override' => 0,
 314                 'default' => [0]},
 315
 316         # Enable the 'snapshot' link, providing a compressed archive of any
 317         # tree. This can potentially generate high traffic if you have large
 318         # project.
 319
 320         # Value is a list of formats defined in %known_snapshot_formats that
 321         # you wish to offer.
 322         # To disable system wide have in $GITWEB_CONFIG
 323         # $feature{'snapshot'}{'default'} = [];
 324         # To have project specific config enable override in $GITWEB_CONFIG
 325         # $feature{'snapshot'}{'override'} = 1;
 326         # and in project config, a comma-separated list of formats or "none"
 327         # to disable.  Example: gitweb.snapshot = tbz2,zip;
 328         'snapshot' => {
 329                 'sub' => \&feature_snapshot,
 330                 'override' => 0,
 331                 'default' => ['tgz']},
 332
 333         # Enable text search, which will list the commits which match author,
 334         # committer or commit text to a given string.  Enabled by default.
 335         # Project specific override is not supported.
 336         #
 337         # Note that this controls all search features, which means that if
 338         # it is disabled, then 'grep' and 'pickaxe' search would also be
 339         # disabled.
 340         'search' => {
 341                 'override' => 0,
 342                 'default' => [1]},
 343
 344         # Enable grep search, which will list the files in currently selected
 345         # tree containing the given string. Enabled by default. This can be
 346         # potentially CPU-intensive, of course.
 347         # Note that you need to have 'search' feature enabled too.
 348
 349         # To enable system wide have in $GITWEB_CONFIG
 350         # $feature{'grep'}{'default'} = [1];
 351         # To have project specific config enable override in $GITWEB_CONFIG
 352         # $feature{'grep'}{'override'} = 1;
 353         # and in project config gitweb.grep = 0|1;
 354         'grep' => {
 355                 'sub' => sub { feature_bool('grep', @_) },
 356                 'override' => 0,
 357                 'default' => [1]},
 358
 359         # Enable the pickaxe search, which will list the commits that modified
 360         # a given string in a file. This can be practical and quite faster
 361         # alternative to 'blame', but still potentially CPU-intensive.
 362         # Note that you need to have 'search' feature enabled too.
 363
 364         # To enable system wide have in $GITWEB_CONFIG
 365         # $feature{'pickaxe'}{'default'} = [1];
 366         # To have project specific config enable override in $GITWEB_CONFIG
 367         # $feature{'pickaxe'}{'override'} = 1;
 368         # and in project config gitweb.pickaxe = 0|1;
 369         'pickaxe' => {
 370                 'sub' => sub { feature_bool('pickaxe', @_) },
 371                 'override' => 0,
 372                 'default' => [1]},
 373
 374         # Enable showing size of blobs in a 'tree' view, in a separate
 375         # column, similar to what 'ls -l' does.  This cost a bit of IO.
 376
 377         # To disable system wide have in $GITWEB_CONFIG
 378         # $feature{'show-sizes'}{'default'} = [0];
 379         # To have project specific config enable override in $GITWEB_CONFIG
 380         # $feature{'show-sizes'}{'override'} = 1;
 381         # and in project config gitweb.showsizes = 0|1;
 382         'show-sizes' => {
 383                 'sub' => sub { feature_bool('showsizes', @_) },
 384                 'override' => 0,
 385                 'default' => [1]},
 386
 387         # Make gitweb use an alternative format of the URLs which can be
 388         # more readable and natural-looking: project name is embedded
 389         # directly in the path and the query string contains other
 390         # auxiliary information. All gitweb installations recognize
 391         # URL in either format; this configures in which formats gitweb
 392         # generates links.
 393
 394         # To enable system wide have in $GITWEB_CONFIG
 395         # $feature{'pathinfo'}{'default'} = [1];
 396         # Project specific override is not supported.
 397
 398         # Note that you will need to change the default location of CSS,
 399         # favicon, logo and possibly other files to an absolute URL. Also,
 400         # if gitweb.cgi serves as your indexfile, you will need to force
 401         # $my_uri to contain the script name in your $GITWEB_CONFIG.
 402         'pathinfo' => {
 403                 'override' => 0,
 404                 'default' => [0]},
 405
 406         # Make gitweb consider projects in project root subdirectories
 407         # to be forks of existing projects. Given project $projname.git,
 408         # projects matching $projname/*.git will not be shown in the main
 409         # projects list, instead a '+' mark will be added to $projname
 410         # there and a 'forks' view will be enabled for the project, listing
 411         # all the forks. If project list is taken from a file, forks have
 412         # to be listed after the main project.
 413
 414         # To enable system wide have in $GITWEB_CONFIG
 415         # $feature{'forks'}{'default'} = [1];
 416         # Project specific override is not supported.
 417         'forks' => {
 418                 'override' => 0,
 419                 'default' => [0]},
 420
 421         # Insert custom links to the action bar of all project pages.
 422         # This enables you mainly to link to third-party scripts integrating
 423         # into gitweb; e.g. git-browser for graphical history representation
 424         # or custom web-based repository administration interface.
 425
 426         # The 'default' value consists of a list of triplets in the form
 427         # (label, link, position) where position is the label after which
 428         # to insert the link and link is a format string where %n expands
 429         # to the project name, %f to the project path within the filesystem,
 430         # %h to the current hash (h gitweb parameter) and %b to the current
 431         # hash base (hb gitweb parameter); %% expands to %.
 432
 433         # To enable system wide have in $GITWEB_CONFIG e.g.
 434         # $feature{'actions'}{'default'} = [('graphiclog',
 435         #       '/git-browser/by-commit.html?r=%n', 'summary')];
 436         # Project specific override is not supported.
 437         'actions' => {
 438                 'override' => 0,
 439                 'default' => []},
 440
 441         # Allow gitweb scan project content tags of project repository,
 442         # and display the popular Web 2.0-ish "tag cloud" near the projects
 443         # list.  Note that this is something COMPLETELY different from the
 444         # normal Git tags.
 445
 446         # gitweb by itself can show existing tags, but it does not handle
 447         # tagging itself; you need to do it externally, outside gitweb.
 448         # The format is described in git_get_project_ctags() subroutine.
 449         # You may want to install the HTML::TagCloud Perl module to get
 450         # a pretty tag cloud instead of just a list of tags.
 451
 452         # To enable system wide have in $GITWEB_CONFIG
 453         # $feature{'ctags'}{'default'} = [1];
 454         # Project specific override is not supported.
 455
 456         # In the future whether ctags editing is enabled might depend
 457         # on the value, but using 1 should always mean no editing of ctags.
 458         'ctags' => {
 459                 'override' => 0,
 460                 'default' => [0]},
 461
 462         # The maximum number of patches in a patchset generated in patch
 463         # view. Set this to 0 or undef to disable patch view, or to a
 464         # negative number to remove any limit.
 465
 466         # To disable system wide have in $GITWEB_CONFIG
 467         # $feature{'patches'}{'default'} = [0];
 468         # To have project specific config enable override in $GITWEB_CONFIG
 469         # $feature{'patches'}{'override'} = 1;
 470         # and in project config gitweb.patches = 0|n;
 471         # where n is the maximum number of patches allowed in a patchset.
 472         'patches' => {
 473                 'sub' => \&feature_patches,
 474                 'override' => 0,
 475                 'default' => [16]},
 476
 477         # Avatar support. When this feature is enabled, views such as
 478         # shortlog or commit will display an avatar associated with
 479         # the email of the committer(s) and/or author(s).
 480
 481         # Currently available providers are gravatar and picon.
 482         # If an unknown provider is specified, the feature is disabled.
 483
 484         # Gravatar depends on Digest::MD5.
 485         # Picon currently relies on the indiana.edu database.
 486
 487         # To enable system wide have in $GITWEB_CONFIG
 488         # $feature{'avatar'}{'default'} = ['<provider>'];
 489         # where <provider> is either gravatar or picon.
 490         # To have project specific config enable override in $GITWEB_CONFIG
 491         # $feature{'avatar'}{'override'} = 1;
 492         # and in project config gitweb.avatar = <provider>;
 493         'avatar' => {
 494                 'sub' => \&feature_avatar,
 495                 'override' => 0,
 496                 'default' => ['']},
 497
 498         # Enable displaying how much time and how many git commands
 499         # it took to generate and display page.  Disabled by default.
 500         # Project specific override is not supported.
 501         'timed' => {
 502                 'override' => 0,
 503                 'default' => [0]},
 504
 505         # Enable turning some links into links to actions which require
 506         # JavaScript to run (like 'blame_incremental').  Not enabled by
 507         # default.  Project specific override is currently not supported.
 508         'javascript-actions' => {
 509                 'override' => 0,
 510                 'default' => [0]},
 511
 512         # Enable and configure ability to change common timezone for dates
 513         # in gitweb output via JavaScript.  Enabled by default.
 514         # Project specific override is not supported.
 515         'javascript-timezone' => {
 516                 'override' => 0,
 517                 'default' => [
 518                         'local',     # default timezone: 'utc', 'local', or '(-|+)HHMM' format,
 519                                      # or undef to turn off this feature
 520                         'gitweb_tz', # name of cookie where to store selected timezone
 521                         'datetime',  # CSS class used to mark up dates for manipulation
 522                 ]},
 523
 524         # Syntax highlighting support. This is based on Daniel Svensson's
 525         # and Sham Chukoury's work in gitweb-xmms2.git.
 526         # It requires the 'highlight' program present in $PATH,
 527         # and therefore is disabled by default.
 528
 529         # To enable system wide have in $GITWEB_CONFIG
 530         # $feature{'highlight'}{'default'} = [1];
 531
 532         'highlight' => {
 533                 'sub' => sub { feature_bool('highlight', @_) },
 534                 'override' => 0,
 535                 'default' => [0]},
 536
 537         # Enable displaying of remote heads in the heads list
 538
 539         # To enable system wide have in $GITWEB_CONFIG
 540         # $feature{'remote_heads'}{'default'} = [1];
 541         # To have project specific config enable override in $GITWEB_CONFIG
 542         # $feature{'remote_heads'}{'override'} = 1;
 543         # and in project config gitweb.remoteheads = 0|1;
 544         'remote_heads' => {
 545                 'sub' => sub { feature_bool('remote_heads', @_) },
 546                 'override' => 0,
 547                 'default' => [0]},
 548 );
 549
 550 sub gitweb_get_feature {
 551         my ($name) = @_;
 552         return unless exists $feature{$name};
 553         my ($sub, $override, @defaults) = (
 554                 $feature{$name}{'sub'},
 555                 $feature{$name}{'override'},
 556                 @{$feature{$name}{'default'}});
 557         # project specific override is possible only if we have project
 558         our $git_dir; # global variable, declared later
 559         if (!$override || !defined $git_dir) {
 560                 return @defaults;
 561         }
 562         if (!defined $sub) {
 563                 warn "feature $name is not overridable";
 564                 return @defaults;
 565         }
 566         return $sub->(@defaults);
 567 }
 568
 569 # A wrapper to check if a given feature is enabled.
 570 # With this, you can say
 571 #
 572 #   my $bool_feat = gitweb_check_feature('bool_feat');
 573 #   gitweb_check_feature('bool_feat') or somecode;
 574 #
 575 # instead of
 576 #
 577 #   my ($bool_feat) = gitweb_get_feature('bool_feat');
 578 #   (gitweb_get_feature('bool_feat'))[0] or somecode;
 579 #
 580 sub gitweb_check_feature {
 581         return (gitweb_get_feature(@_))[0];
 582 }
 583
 584
 585 sub feature_bool {
 586         my $key = shift;
 587         my ($val) = git_get_project_config($key, '--bool');
 588
 589         if (!defined $val) {
 590                 return ($_[0]);
 591         } elsif ($val eq 'true') {
 592                 return (1);
 593         } elsif ($val eq 'false') {
 594                 return (0);
 595         }
 596 }
 597
 598 sub feature_snapshot {
 599         my (@fmts) = @_;
 600
 601         my ($val) = git_get_project_config('snapshot');
 602
 603         if ($val) {
 604                 @fmts = ($val eq 'none' ? () : split /\s*[,\s]\s*/, $val);
 605         }
 606
 607         return @fmts;
 608 }
 609
 610 sub feature_patches {
 611         my @val = (git_get_project_config('patches', '--int'));
 612
 613         if (@val) {
 614                 return @val;
 615         }
 616
 617         return ($_[0]);
 618 }
 619
 620 sub feature_avatar {
 621         my @val = (git_get_project_config('avatar'));
 622
 623         return @val ? @val : @_;
 624 }
 625
 626 # checking HEAD file with -e is fragile if the repository was
 627 # initialized long time ago (i.e. symlink HEAD) and was pack-ref'ed
 628 # and then pruned.
 629 sub check_head_link {
 630         my ($dir) = @_;
 631         my $headfile = "$dir/HEAD";
 632         return ((-e $headfile) ||
 633                 (-l $headfile && readlink($headfile) =~ /^refs\/heads\//));
 634 }
 635
 636 sub check_export_ok {
 637         my ($dir) = @_;
 638         return (check_head_link($dir) &&
 639                 (!$export_ok || -e "$dir/$export_ok") &&
 640                 (!$export_auth_hook || $export_auth_hook->($dir)));
 641 }
 642
 643 # process alternate names for backward compatibility
 644 # filter out unsupported (unknown) snapshot formats
 645 sub filter_snapshot_fmts {
 646         my @fmts = @_;
 647
 648         @fmts = map {
 649                 exists $known_snapshot_format_aliases{$_} ?
 650                        $known_snapshot_format_aliases{$_} : $_} @fmts;
 651         @fmts = grep {
 652                 exists $known_snapshot_formats{$_} &&
 653                 !$known_snapshot_formats{$_}{'disabled'}} @fmts;
 654 }
 655
 656 # If it is set to code reference, it is code that it is to be run once per
 657 # request, allowing updating configurations that change with each request,
 658 # while running other code in config file only once.
 659 #
 660 # Otherwise, if it is false then gitweb would process config file only once;
 661 # if it is true then gitweb config would be run for each request.
 662 our $per_request_config = 1;
 663
 664 # read and parse gitweb config file given by its parameter.
 665 # returns true on success, false on recoverable error, allowing
 666 # to chain this subroutine, using first file that exists.
 667 # dies on errors during parsing config file, as it is unrecoverable.
 668 sub read_config_file {
 669         my $filename = shift;
 670         return unless defined $filename;
 671         # die if there are errors parsing config file
 672         if (-e $filename) {
 673                 do $filename;
 674                 die $@ if $@;
 675                 return 1;
 676         }
 677         return;
 678 }
 679
 680 our ($GITWEB_CONFIG, $GITWEB_CONFIG_SYSTEM, $GITWEB_CONFIG_COMMON);
 681 sub evaluate_gitweb_config {
 682         our $GITWEB_CONFIG = $ENV{'GITWEB_CONFIG'} || "++GITWEB_CONFIG++";
 683         our $GITWEB_CONFIG_SYSTEM = $ENV{'GITWEB_CONFIG_SYSTEM'} || "++GITWEB_CONFIG_SYSTEM++";
 684         our $GITWEB_CONFIG_COMMON = $ENV{'GITWEB_CONFIG_COMMON'} || "++GITWEB_CONFIG_COMMON++";
 685
 686         # Protect agains duplications of file names, to not read config twice.
 687         # Only one of $GITWEB_CONFIG and $GITWEB_CONFIG_SYSTEM is used, so
 688         # there possibility of duplication of filename there doesn't matter.
 689         $GITWEB_CONFIG = ""        if ($GITWEB_CONFIG eq $GITWEB_CONFIG_COMMON);
 690         $GITWEB_CONFIG_SYSTEM = "" if ($GITWEB_CONFIG_SYSTEM eq $GITWEB_CONFIG_COMMON);
 691
 692         # Common system-wide settings for convenience.
 693         # Those settings can be ovverriden by GITWEB_CONFIG or GITWEB_CONFIG_SYSTEM.
 694         read_config_file($GITWEB_CONFIG_COMMON);
 695
 696         # Use first config file that exists.  This means use the per-instance
 697         # GITWEB_CONFIG if exists, otherwise use GITWEB_SYSTEM_CONFIG.
 698         read_config_file($GITWEB_CONFIG) and return;
 699         read_config_file($GITWEB_CONFIG_SYSTEM);
 700 }
 701
 702 # Get loadavg of system, to compare against $maxload.
 703 # Currently it requires '/proc/loadavg' present to get loadavg;
 704 # if it is not present it returns 0, which means no load checking.
 705 sub get_loadavg {
 706         if( -e '/proc/loadavg' ){
 707                 open my $fd, '<', '/proc/loadavg'
 708                         or return 0;
 709                 my @load = split(/\s+/, scalar <$fd>);
 710                 close $fd;
 711
 712                 # The first three columns measure CPU and IO utilization of the last one,
 713                 # five, and 10 minute periods.  The fourth column shows the number of
 714                 # currently running processes and the total number of processes in the m/n
 715                 # format.  The last column displays the last process ID used.
 716                 return $load[0] || 0;
 717         }
 718         # additional checks for load average should go here for things that don't export
 719         # /proc/loadavg
 720
 721         return 0;
 722 }
 723
 724 # version of the core git binary
 725 our $git_version;
 726 sub evaluate_git_version {
 727         our $git_version = qx("$GIT" --version) =~ m/git version (.*)$/ ? $1 : "unknown";
 728         $number_of_git_cmds++;
 729 }
 730
 731 sub check_loadavg {
 732         if (defined $maxload && get_loadavg() > $maxload) {
 733                 die_error(503, "The load average on the server is too high");
 734         }
 735 }
 736
 737 # ======================================================================
 738 # input validation and dispatch
 739
 740 # input parameters can be collected from a variety of sources (presently, CGI
 741 # and PATH_INFO), so we define an %input_params hash that collects them all
 742 # together during validation: this allows subsequent uses (e.g. href()) to be
 743 # agnostic of the parameter origin
 744
 745 our %input_params = ();
 746
 747 # input parameters are stored with the long parameter name as key. This will
 748 # also be used in the href subroutine to convert parameters to their CGI
 749 # equivalent, and since the href() usage is the most frequent one, we store
 750 # the name -> CGI key mapping here, instead of the reverse.
 751 #
 752 # XXX: Warning: If you touch this, check the search form for updating,
 753 # too.
 754
 755 our @cgi_param_mapping = (
 756         project => "p",
 757         action => "a",
 758         file_name => "f",
 759         file_parent => "fp",
 760         hash => "h",
 761         hash_parent => "hp",
 762         hash_base => "hb",
 763         hash_parent_base => "hpb",
 764         page => "pg",
 765         order => "o",
 766         searchtext => "s",
 767         searchtype => "st",
 768         snapshot_format => "sf",
 769         extra_options => "opt",
 770         search_use_regexp => "sr",
 771         ctag => "by_tag",
 772         diff_style => "ds",
 773         project_filter => "pf",
 774         # this must be last entry (for manipulation from JavaScript)
 775         javascript => "js"
 776 );
 777 our %cgi_param_mapping = @cgi_param_mapping;
 778
 779 # we will also need to know the possible actions, for validation
 780 our %actions = (
 781         "blame" => \&git_blame,
 782         "blame_incremental" => \&git_blame_incremental,
 783         "blame_data" => \&git_blame_data,
 784         "blobdiff" => \&git_blobdiff,
 785         "blobdiff_plain" => \&git_blobdiff_plain,
 786         "blob" => \&git_blob,
 787         "blob_plain" => \&git_blob_plain,
 788         "commitdiff" => \&git_commitdiff,
 789         "commitdiff_plain" => \&git_commitdiff_plain,
 790         "commit" => \&git_commit,
 791         "forks" => \&git_forks,
 792         "heads" => \&git_heads,
 793         "history" => \&git_history,
 794         "log" => \&git_log,
 795         "patch" => \&git_patch,
 796         "patches" => \&git_patches,
 797         "remotes" => \&git_remotes,
 798         "rss" => \&git_rss,
 799         "atom" => \&git_atom,
 800         "search" => \&git_search,
 801         "search_help" => \&git_search_help,
 802         "shortlog" => \&git_shortlog,
 803         "summary" => \&git_summary,
 804         "tag" => \&git_tag,
 805         "tags" => \&git_tags,
 806         "tree" => \&git_tree,
 807         "snapshot" => \&git_snapshot,
 808         "object" => \&git_object,
 809         # those below don't need $project
 810         "opml" => \&git_opml,
 811         "project_list" => \&git_project_list,
 812         "project_index" => \&git_project_index,
 813 );
 814
 815 # finally, we have the hash of allowed extra_options for the commands that
 816 # allow them
 817 our %allowed_options = (
 818         "--no-merges" => [ qw(rss atom log shortlog history) ],
 819 );
 820
 821 # fill %input_params with the CGI parameters. All values except for 'opt'
 822 # should be single values, but opt can be an array. We should probably
 823 # build an array of parameters that can be multi-valued, but since for the time
 824 # being it's only this one, we just single it out
 825 sub evaluate_query_params {
 826         our $cgi;
 827
 828         while (my ($name, $symbol) = each %cgi_param_mapping) {
 829                 if ($symbol eq 'opt') {
 830                         $input_params{$name} = [ map { decode_utf8($_) } $cgi->param($symbol) ];
 831                 } else {
 832                         $input_params{$name} = decode_utf8($cgi->param($symbol));
 833                 }
 834         }
 835 }
 836
 837 # now read PATH_INFO and update the parameter list for missing parameters
 838 sub evaluate_path_info {
 839         return if defined $input_params{'project'};
 840         return if !$path_info;
 841         $path_info =~ s,^/+,,;
 842         return if !$path_info;
 843
 844         # find which part of PATH_INFO is project
 845         my $project = $path_info;
 846         $project =~ s,/+$,,;
 847         while ($project && !check_head_link("$projectroot/$project")) {
 848                 $project =~ s,/*[^/]*$,,;
 849         }
 850         return unless $project;
 851         $input_params{'project'} = $project;
 852
 853         # do not change any parameters if an action is given using the query string
 854         return if $input_params{'action'};
 855         $path_info =~ s,^\Q$project\E/*,,;
 856
 857         # next, check if we have an action
 858         my $action = $path_info;
 859         $action =~ s,/.*$,,;
 860         if (exists $actions{$action}) {
 861                 $path_info =~ s,^$action/*,,;
 862                 $input_params{'action'} = $action;
 863         }
 864
 865         # list of actions that want hash_base instead of hash, but can have no
 866         # pathname (f) parameter
 867         my @wants_base = (
 868                 'tree',
 869                 'history',
 870         );
 871
 872         # we want to catch, among others
 873         # [$hash_parent_base[:$file_parent]..]$hash_parent[:$file_name]
 874         my ($parentrefname, $parentpathname, $refname, $pathname) =
 875                 ($path_info =~ /^(?:(.+?)(?::(.+))?\.\.)?([^:]+?)?(?::(.+))?$/);
 876
 877         # first, analyze the 'current' part
 878         if (defined $pathname) {
 879                 # we got "branch:filename" or "branch:dir/"
 880                 # we could use git_get_type(branch:pathname), but:
 881                 # - it needs $git_dir
 882                 # - it does a git() call
 883                 # - the convention of terminating directories with a slash
 884                 #   makes it superfluous
 885                 # - embedding the action in the PATH_INFO would make it even
 886                 #   more superfluous
 887                 $pathname =~ s,^/+,,;
 888                 if (!$pathname || substr($pathname, -1) eq "/") {
 889                         $input_params{'action'} ||= "tree";
 890                         $pathname =~ s,/$,,;
 891                 } else {
 892                         # the default action depends on whether we had parent info
 893                         # or not
 894                         if ($parentrefname) {
 895                                 $input_params{'action'} ||= "blobdiff_plain";
 896                         } else {
 897                                 $input_params{'action'} ||= "blob_plain";
 898                         }
 899                 }
 900                 $input_params{'hash_base'} ||= $refname;
 901                 $input_params{'file_name'} ||= $pathname;
 902         } elsif (defined $refname) {
 903                 # we got "branch". In this case we have to choose if we have to
 904                 # set hash or hash_base.
 905                 #
 906                 # Most of the actions without a pathname only want hash to be
 907                 # set, except for the ones specified in @wants_base that want
 908                 # hash_base instead. It should also be noted that hand-crafted
 909                 # links having 'history' as an action and no pathname or hash
 910                 # set will fail, but that happens regardless of PATH_INFO.
 911                 if (defined $parentrefname) {
 912                         # if there is parent let the default be 'shortlog' action
 913                         # (for http://git.example.com/repo.git/A..B links); if there
 914                         # is no parent, dispatch will detect type of object and set
 915                         # action appropriately if required (if action is not set)
 916                         $input_params{'action'} ||= "shortlog";
 917                 }
 918                 if ($input_params{'action'} &&
 919                     grep { $_ eq $input_params{'action'} } @wants_base) {
 920                         $input_params{'hash_base'} ||= $refname;
 921                 } else {
 922                         $input_params{'hash'} ||= $refname;
 923                 }
 924         }
 925
 926         # next, handle the 'parent' part, if present
 927         if (defined $parentrefname) {
 928                 # a missing pathspec defaults to the 'current' filename, allowing e.g.
 929                 # someproject/blobdiff/oldrev..newrev:/filename
 930                 if ($parentpathname) {
 931                         $parentpathname =~ s,^/+,,;
 932                         $parentpathname =~ s,/$,,;
 933                         $input_params{'file_parent'} ||= $parentpathname;
 934                 } else {
 935                         $input_params{'file_parent'} ||= $input_params{'file_name'};
 936                 }
 937                 # we assume that hash_parent_base is wanted if a path was specified,
 938                 # or if the action wants hash_base instead of hash
 939                 if (defined $input_params{'file_parent'} ||
 940                         grep { $_ eq $input_params{'action'} } @wants_base) {
 941                         $input_params{'hash_parent_base'} ||= $parentrefname;
 942                 } else {
 943                         $input_params{'hash_parent'} ||= $parentrefname;
 944                 }
 945         }
 946
 947         # for the snapshot action, we allow URLs in the form
 948         # $project/snapshot/$hash.ext
 949         # where .ext determines the snapshot and gets removed from the
 950         # passed $refname to provide the $hash.
 951         #
 952         # To be able to tell that $refname includes the format extension, we
 953         # require the following two conditions to be satisfied:
 954         # - the hash input parameter MUST have been set from the $refname part
 955         #   of the URL (i.e. they must be equal)
 956         # - the snapshot format MUST NOT have been defined already (e.g. from
 957         #   CGI parameter sf)
 958         # It's also useless to try any matching unless $refname has a dot,
 959         # so we check for that too
 960         if (defined $input_params{'action'} &&
 961                 $input_params{'action'} eq 'snapshot' &&
 962                 defined $refname && index($refname, '.') != -1 &&
 963                 $refname eq $input_params{'hash'} &&
 964                 !defined $input_params{'snapshot_format'}) {
 965                 # We loop over the known snapshot formats, checking for
 966                 # extensions. Allowed extensions are both the defined suffix
 967                 # (which includes the initial dot already) and the snapshot
 968                 # format key itself, with a prepended dot
 969                 while (my ($fmt, $opt) = each %known_snapshot_formats) {
 970                         my $hash = $refname;
 971                         unless ($hash =~ s/(\Q$opt->{'suffix'}\E|\Q.$fmt\E)$//) {
 972                                 next;
 973                         }
 974                         my $sfx = $1;
 975                         # a valid suffix was found, so set the snapshot format
 976                         # and reset the hash parameter
 977                         $input_params{'snapshot_format'} = $fmt;
 978                         $input_params{'hash'} = $hash;
 979                         # we also set the format suffix to the one requested
 980                         # in the URL: this way a request for e.g. .tgz returns
 981                         # a .tgz instead of a .tar.gz
 982                         $known_snapshot_formats{$fmt}{'suffix'} = $sfx;
 983                         last;
 984                 }
 985         }
 986 }
 987
 988 our ($action, $project, $file_name, $file_parent, $hash, $hash_parent, $hash_base,
 989      $hash_parent_base, @extra_options, $page, $searchtype, $search_use_regexp,
 990      $searchtext, $search_regexp, $project_filter);
 991 sub evaluate_and_validate_params {
 992         our $action = $input_params{'action'};
 993         if (defined $action) {
 994                 if (!validate_action($action)) {
 995                         die_error(400, "Invalid action parameter");
 996                 }
 997         }
 998
 999         # parameters which are pathnames
1000         our $project = $input_params{'project'};
1001         if (defined $project) {
1002                 if (!validate_project($project)) {
1003                         undef $project;
1004                         die_error(404, "No such project");
1005                 }
1006         }
1007
1008         our $project_filter = $input_params{'project_filter'};
1009         if (defined $project_filter) {
1010                 if (!validate_pathname($project_filter)) {
1011                         die_error(404, "Invalid project_filter parameter");
1012                 }
1013         }
1014
1015         our $file_name = $input_params{'file_name'};
1016         if (defined $file_name) {
1017                 if (!validate_pathname($file_name)) {
1018                         die_error(400, "Invalid file parameter");
1019                 }
1020         }
1021
1022         our $file_parent = $input_params{'file_parent'};
1023         if (defined $file_parent) {
1024                 if (!validate_pathname($file_parent)) {
1025                         die_error(400, "Invalid file parent parameter");
1026                 }
1027         }
1028
1029         # parameters which are refnames
1030         our $hash = $input_params{'hash'};
1031         if (defined $hash) {
1032                 if (!validate_refname($hash)) {
1033                         die_error(400, "Invalid hash parameter");
1034                 }
1035         }
1036
1037         our $hash_parent = $input_params{'hash_parent'};
1038         if (defined $hash_parent) {
1039                 if (!validate_refname($hash_parent)) {
1040                         die_error(400, "Invalid hash parent parameter");
1041                 }
1042         }
1043
1044         our $hash_base = $input_params{'hash_base'};
1045         if (defined $hash_base) {
1046                 if (!validate_refname($hash_base)) {
1047                         die_error(400, "Invalid hash base parameter");
1048                 }
1049         }
1050
1051         our @extra_options = @{$input_params{'extra_options'}};
1052         # @extra_options is always defined, since it can only be (currently) set from
1053         # CGI, and $cgi->param() returns the empty array in array context if the param
1054         # is not set
1055         foreach my $opt (@extra_options) {
1056                 if (not exists $allowed_options{$opt}) {
1057                         die_error(400, "Invalid option parameter");
1058                 }
1059                 if (not grep(/^$action$/, @{$allowed_options{$opt}})) {
1060                         die_error(400, "Invalid option parameter for this action");
1061                 }
1062         }
1063
1064         our $hash_parent_base = $input_params{'hash_parent_base'};
1065         if (defined $hash_parent_base) {
1066                 if (!validate_refname($hash_parent_base)) {
1067                         die_error(400, "Invalid hash parent base parameter");
1068                 }
1069         }
1070
1071         # other parameters
1072         our $page = $input_params{'page'};
1073         if (defined $page) {
1074                 if ($page =~ m/[^0-9]/) {
1075                         die_error(400, "Invalid page parameter");
1076                 }
1077         }
1078
1079         our $searchtype = $input_params{'searchtype'};
1080         if (defined $searchtype) {
1081                 if ($searchtype =~ m/[^a-z]/) {
1082                         die_error(400, "Invalid searchtype parameter");
1083                 }
1084         }
1085
1086         our $search_use_regexp = $input_params{'search_use_regexp'};
1087
1088         our $searchtext = $input_params{'searchtext'};
1089         our $search_regexp;
1090         if (defined $searchtext) {
1091                 if (length($searchtext) < 2) {
1092                         die_error(403, "At least two characters are required for search parameter");
1093                 }
1094                 if ($search_use_regexp) {
1095                         $search_regexp = $searchtext;
1096                         if (!eval { qr/$search_regexp/; 1; }) {
1097                                 (my $error = $@) =~ s/ at \S+ line \d+.*\n?//;
1098                                 die_error(400, "Invalid search regexp '$search_regexp'",
1099                                           esc_html($error));
1100                         }
1101                 } else {
1102                         $search_regexp = quotemeta $searchtext;
1103                 }
1104         }
1105 }
1106
1107 # path to the current git repository
1108 our $git_dir;
1109 sub evaluate_git_dir {
1110         our $git_dir = "$projectroot/$project" if $project;
1111 }
1112
1113 our (@snapshot_fmts, $git_avatar);
1114 sub configure_gitweb_features {
1115         # list of supported snapshot formats
1116         our @snapshot_fmts = gitweb_get_feature('snapshot');
1117         @snapshot_fmts = filter_snapshot_fmts(@snapshot_fmts);
1118
1119         # check that the avatar feature is set to a known provider name,
1120         # and for each provider check if the dependencies are satisfied.
1121         # if the provider name is invalid or the dependencies are not met,
1122         # reset $git_avatar to the empty string.
1123         our ($git_avatar) = gitweb_get_feature('avatar');
1124         if ($git_avatar eq 'gravatar') {
1125                 $git_avatar = '' unless (eval { require Digest::MD5; 1; });
1126         } elsif ($git_avatar eq 'picon') {
1127                 # no dependencies
1128         } else {
1129                 $git_avatar = '';
1130         }
1131 }
1132
1133 # custom error handler: 'die <message>' is Internal Server Error
1134 sub handle_errors_html {
1135         my $msg = shift; # it is already HTML escaped
1136
1137         # to avoid infinite loop where error occurs in die_error,
1138         # change handler to default handler, disabling handle_errors_html
1139         set_message("Error occured when inside die_error:\n$msg");
1140
1141         # you cannot jump out of die_error when called as error handler;
1142         # the subroutine set via CGI::Carp::set_message is called _after_
1143         # HTTP headers are already written, so it cannot write them itself
1144         die_error(undef, undef, $msg, -error_handler => 1, -no_http_header => 1);
1145 }
1146 set_message(\&handle_errors_html);
1147
1148 # dispatch
1149 sub dispatch {
1150         if (!defined $action) {
1151                 if (defined $hash) {
1152                         $action = git_get_type($hash);
1153                         $action or die_error(404, "Object does not exist");
1154                 } elsif (defined $hash_base && defined $file_name) {
1155                         $action = git_get_type("$hash_base:$file_name");
1156                         $action or die_error(404, "File or directory does not exist");
1157                 } elsif (defined $project) {
1158                         $action = 'summary';
1159                 } else {
1160                         $action = 'project_list';
1161                 }
1162         }
1163         if (!defined($actions{$action})) {
1164                 die_error(400, "Unknown action");
1165         }
1166         if ($action !~ m/^(?:opml|project_list|project_index)$/ &&
1167             !$project) {
1168                 die_error(400, "Project needed");
1169         }
1170         $actions{$action}->();
1171 }
1172
1173 sub reset_timer {
1174         our $t0 = [ gettimeofday() ]
1175                 if defined $t0;
1176         our $number_of_git_cmds = 0;
1177 }
1178
1179 our $first_request = 1;
1180 sub run_request {
1181         reset_timer();
1182
1183         evaluate_uri();
1184         if ($first_request) {
1185                 evaluate_gitweb_config();
1186                 evaluate_git_version();
1187         }
1188         if ($per_request_config) {
1189                 if (ref($per_request_config) eq 'CODE') {
1190                         $per_request_config->();
1191                 } elsif (!$first_request) {
1192                         evaluate_gitweb_config();
1193                 }
1194         }
1195         check_loadavg();
1196
1197         # $projectroot and $projects_list might be set in gitweb config file
1198         $projects_list ||= $projectroot;
1199
1200         evaluate_query_params();
1201         evaluate_path_info();
1202         evaluate_and_validate_params();
1203         evaluate_git_dir();
1204
1205         configure_gitweb_features();
1206
1207         dispatch();
1208 }
1209
1210 our $is_last_request = sub { 1 };
1211 our ($pre_dispatch_hook, $post_dispatch_hook, $pre_listen_hook);
1212 our $CGI = 'CGI';
1213 our $cgi;
1214 sub configure_as_fcgi {
1215         require CGI::Fast;
1216         our $CGI = 'CGI::Fast';
1217
1218         my $request_number = 0;
1219         # let each child service 100 requests
1220         our $is_last_request = sub { ++$request_number > 100 };
1221 }
1222 sub evaluate_argv {
1223         my $script_name = $ENV{'SCRIPT_NAME'} || $ENV{'SCRIPT_FILENAME'} || __FILE__;
1224         configure_as_fcgi()
1225                 if $script_name =~ /\.fcgi$/;
1226
1227         return unless (@ARGV);
1228
1229         require Getopt::Long;
1230         Getopt::Long::GetOptions(
1231                 'fastcgi|fcgi|f' => \&configure_as_fcgi,
1232                 'nproc|n=i' => sub {
1233                         my ($arg, $val) = @_;
1234                         return unless eval { require FCGI::ProcManager; 1; };
1235                         my $proc_manager = FCGI::ProcManager->new({
1236                                 n_processes => $val,
1237                         });
1238                         our $pre_listen_hook    = sub { $proc_manager->pm_manage()        };
1239                         our $pre_dispatch_hook  = sub { $proc_manager->pm_pre_dispatch()  };
1240                         our $post_dispatch_hook = sub { $proc_manager->pm_post_dispatch() };
1241                 },
1242         );
1243 }
1244
1245 sub run {
1246         evaluate_argv();
1247
1248         $first_request = 1;
1249         $pre_listen_hook->()
1250                 if $pre_listen_hook;
1251
1252  REQUEST:
1253         while ($cgi = $CGI->new()) {
1254                 $pre_dispatch_hook->()
1255                         if $pre_dispatch_hook;
1256
1257                 run_request();
1258
1259                 $post_dispatch_hook->()
1260                         if $post_dispatch_hook;
1261                 $first_request = 0;
1262
1263                 last REQUEST if ($is_last_request->());
1264         }
1265
1266  DONE_GITWEB:
1267         1;
1268 }
1269
1270 run();
1271
1272 if (defined caller) {
1273         # wrapped in a subroutine processing requests,
1274         # e.g. mod_perl with ModPerl::Registry, or PSGI with Plack::App::WrapCGI
1275         return;
1276 } else {
1277         # pure CGI script, serving single request
1278         exit;
1279 }
1280
1281 ## ======================================================================
1282 ## action links
1283
1284 # possible values of extra options
1285 # -full => 0|1      - use absolute/full URL ($my_uri/$my_url as base)
1286 # -replay => 1      - start from a current view (replay with modifications)
1287 # -path_info => 0|1 - don't use/use path_info URL (if possible)
1288 # -anchor => ANCHOR - add #ANCHOR to end of URL, implies -replay if used alone
1289 sub href {
1290         my %params = @_;
1291         # default is to use -absolute url() i.e. $my_uri
1292         my $href = $params{-full} ? $my_url : $my_uri;
1293
1294         # implicit -replay, must be first of implicit params
1295         $params{-replay} = 1 if (keys %params == 1 && $params{-anchor});
1296
1297         $params{'project'} = $project unless exists $params{'project'};
1298
1299         if ($params{-replay}) {
1300                 while (my ($name, $symbol) = each %cgi_param_mapping) {
1301                         if (!exists $params{$name}) {
1302                                 $params{$name} = $input_params{$name};
1303                         }
1304                 }
1305         }
1306
1307         my $use_pathinfo = gitweb_check_feature('pathinfo');
1308         if (defined $params{'project'} &&
1309             (exists $params{-path_info} ? $params{-path_info} : $use_pathinfo)) {
1310                 # try to put as many parameters as possible in PATH_INFO:
1311                 #   - project name
1312                 #   - action
1313                 #   - hash_parent or hash_parent_base:/file_parent
1314                 #   - hash or hash_base:/filename
1315                 #   - the snapshot_format as an appropriate suffix
1316
1317                 # When the script is the root DirectoryIndex for the domain,
1318                 # $href here would be something like http://gitweb.example.com/
1319                 # Thus, we strip any trailing / from $href, to spare us double
1320                 # slashes in the final URL
1321                 $href =~ s,/$,,;
1322
1323                 # Then add the project name, if present
1324                 $href .= "/".esc_path_info($params{'project'});
1325                 delete $params{'project'};
1326
1327                 # since we destructively absorb parameters, we keep this
1328                 # boolean that remembers if we're handling a snapshot
1329                 my $is_snapshot = $params{'action'} eq 'snapshot';
1330
1331                 # Summary just uses the project path URL, any other action is
1332                 # added to the URL
1333                 if (defined $params{'action'}) {
1334                         $href .= "/".esc_path_info($params{'action'})
1335                                 unless $params{'action'} eq 'summary';
1336                         delete $params{'action'};
1337                 }
1338
1339                 # Next, we put hash_parent_base:/file_parent..hash_base:/file_name,
1340                 # stripping nonexistent or useless pieces
1341                 $href .= "/" if ($params{'hash_base'} || $params{'hash_parent_base'}
1342                         || $params{'hash_parent'} || $params{'hash'});
1343                 if (defined $params{'hash_base'}) {
1344                         if (defined $params{'hash_parent_base'}) {
1345                                 $href .= esc_path_info($params{'hash_parent_base'});
1346                                 # skip the file_parent if it's the same as the file_name
1347                                 if (defined $params{'file_parent'}) {
1348                                         if (defined $params{'file_name'} && $params{'file_parent'} eq $params{'file_name'}) {
1349                                                 delete $params{'file_parent'};
1350                                         } elsif ($params{'file_parent'} !~ /\.\./) {
1351                                                 $href .= ":/".esc_path_info($params{'file_parent'});
1352                                                 delete $params{'file_parent'};
1353                                         }
1354                                 }
1355                                 $href .= "..";
1356                                 delete $params{'hash_parent'};
1357                                 delete $params{'hash_parent_base'};
1358                         } elsif (defined $params{'hash_parent'}) {
1359                                 $href .= esc_path_info($params{'hash_parent'}). "..";
1360                                 delete $params{'hash_parent'};
1361                         }
1362
1363                         $href .= esc_path_info($params{'hash_base'});
1364                         if (defined $params{'file_name'} && $params{'file_name'} !~ /\.\./) {
1365                                 $href .= ":/".esc_path_info($params{'file_name'});
1366                                 delete $params{'file_name'};
1367                         }
1368                         delete $params{'hash'};
1369                         delete $params{'hash_base'};
1370                 } elsif (defined $params{'hash'}) {
1371                         $href .= esc_path_info($params{'hash'});
1372                         delete $params{'hash'};
1373                 }
1374
1375                 # If the action was a snapshot, we can absorb the
1376                 # snapshot_format parameter too
1377                 if ($is_snapshot) {
1378                         my $fmt = $params{'snapshot_format'};
1379                         # snapshot_format should always be defined when href()
1380                         # is called, but just in case some code forgets, we
1381                         # fall back to the default
1382                         $fmt ||= $snapshot_fmts[0];
1383                         $href .= $known_snapshot_formats{$fmt}{'suffix'};
1384                         delete $params{'snapshot_format'};
1385                 }
1386         }
1387
1388         # now encode the parameters explicitly
1389         my @result = ();
1390         for (my $i = 0; $i < @cgi_param_mapping; $i += 2) {
1391                 my ($name, $symbol) = ($cgi_param_mapping[$i], $cgi_param_mapping[$i+1]);
1392                 if (defined $params{$name}) {
1393                         if (ref($params{$name}) eq "ARRAY") {
1394                                 foreach my $par (@{$params{$name}}) {
1395                                         push @result, $symbol . "=" . esc_param($par);
1396                                 }
1397                         } else {
1398                                 push @result, $symbol . "=" . esc_param($params{$name});
1399                         }
1400                 }
1401         }
1402         $href .= "?" . join(';', @result) if scalar @result;
1403
1404         # final transformation: trailing spaces must be escaped (URI-encoded)
1405         $href =~ s/(\s+)$/CGI::escape($1)/e;
1406
1407         if ($params{-anchor}) {
1408                 $href .= "#".esc_param($params{-anchor});
1409         }
1410
1411         return $href;
1412 }
1413
1414
1415 ## ======================================================================
1416 ## validation, quoting/unquoting and escaping
1417
1418 sub validate_action {
1419         my $input = shift || return undef;
1420         return undef unless exists $actions{$input};
1421         return $input;
1422 }
1423
1424 sub validate_project {
1425         my $input = shift || return undef;
1426         if (!validate_pathname($input) ||
1427                 !(-d "$projectroot/$input") ||
1428                 !check_export_ok("$projectroot/$input") ||
1429                 ($strict_export && !project_in_list($input))) {
1430                 return undef;
1431         } else {
1432                 return $input;
1433         }
1434 }
1435
1436 sub validate_pathname {
1437         my $input = shift || return undef;
1438
1439         # no '.' or '..' as elements of path, i.e. no '.' nor '..'
1440         # at the beginning, at the end, and between slashes.
1441         # also this catches doubled slashes
1442         if ($input =~ m!(^|/)(|\.|\.\.)(/|$)!) {
1443                 return undef;
1444         }
1445         # no null characters
1446         if ($input =~ m!\0!) {
1447                 return undef;
1448         }
1449         return $input;
1450 }
1451
1452 sub validate_refname {
1453         my $input = shift || return undef;
1454
1455         # textual hashes are O.K.
1456         if ($input =~ m/^[0-9a-fA-F]{40}$/) {
1457                 return $input;
1458         }
1459         # it must be correct pathname
1460         $input = validate_pathname($input)
1461                 or return undef;
1462         # restrictions on ref name according to git-check-ref-format
1463         if ($input =~ m!(/\.|\.\.|[\000-\040\177 ~^:?*\[]|/$)!) {
1464                 return undef;
1465         }
1466         return $input;
1467 }
1468
1469 # decode sequences of octets in utf8 into Perl's internal form,
1470 # which is utf-8 with utf8 flag set if needed.  gitweb writes out
1471 # in utf-8 thanks to "binmode STDOUT, ':utf8'" at beginning
1472 sub to_utf8 {
1473         my $str = shift;
1474         return undef unless defined $str;
1475
1476         if (utf8::is_utf8($str) || utf8::decode($str)) {
1477                 return $str;
1478         } else {
1479                 return decode($fallback_encoding, $str, Encode::FB_DEFAULT);
1480         }
1481 }
1482
1483 # quote unsafe chars, but keep the slash, even when it's not
1484 # correct, but quoted slashes look too horrible in bookmarks
1485 sub esc_param {
1486         my $str = shift;
1487         return undef unless defined $str;
1488         $str =~ s/([^A-Za-z0-9\-_.~()\/:@ ]+)/CGI::escape($1)/eg;
1489         $str =~ s/ /\+/g;
1490         return $str;
1491 }
1492
1493 # the quoting rules for path_info fragment are slightly different
1494 sub esc_path_info {
1495         my $str = shift;
1496         return undef unless defined $str;
1497
1498         # path_info doesn't treat '+' as space (specially), but '?' must be escaped
1499         $str =~ s/([^A-Za-z0-9\-_.~();\/;:@&= +]+)/CGI::escape($1)/eg;
1500
1501         return $str;
1502 }
1503
1504 # quote unsafe chars in whole URL, so some characters cannot be quoted
1505 sub esc_url {
1506         my $str = shift;
1507         return undef unless defined $str;
1508         $str =~ s/([^A-Za-z0-9\-_.~();\/;?:@&= ]+)/CGI::escape($1)/eg;
1509         $str =~ s/ /\+/g;
1510         return $str;
1511 }
1512
1513 # quote unsafe characters in HTML attributes
1514 sub esc_attr {
1515
1516         # for XHTML conformance escaping '"' to '&quot;' is not enough
1517         return esc_html(@_);
1518 }
1519
1520 # replace invalid utf8 character with SUBSTITUTION sequence
1521 sub esc_html {
1522         my $str = shift;
1523         my %opts = @_;
1524
1525         return undef unless defined $str;
1526
1527         $str = to_utf8($str);
1528         $str = $cgi->escapeHTML($str);
1529         if ($opts{'-nbsp'}) {
1530                 $str =~ s/ /&nbsp;/g;
1531         }
1532         $str =~ s|([[:cntrl:]])|(($1 ne "\t") ? quot_cec($1) : $1)|eg;
1533         return $str;
1534 }
1535
1536 # quote control characters and escape filename to HTML
1537 sub esc_path {
1538         my $str = shift;
1539         my %opts = @_;
1540
1541         return undef unless defined $str;
1542
1543         $str = to_utf8($str);
1544         $str = $cgi->escapeHTML($str);
1545         if ($opts{'-nbsp'}) {
1546                 $str =~ s/ /&nbsp;/g;
1547         }
1548         $str =~ s|([[:cntrl:]])|quot_cec($1)|eg;
1549         return $str;
1550 }
1551
1552 # Sanitize for use in XHTML + application/xml+xhtm (valid XML 1.0)
1553 sub sanitize {
1554         my $str = shift;
1555
1556         return undef unless defined $str;
1557
1558         $str = to_utf8($str);
1559         $str =~ s|([[:cntrl:]])|(index("\t\n\r", $1) != -1 ? $1 : quot_cec($1))|eg;
1560         return $str;
1561 }
1562
1563 # Make control characters "printable", using character escape codes (CEC)
1564 sub quot_cec {
1565         my $cntrl = shift;
1566         my %opts = @_;
1567         my %es = ( # character escape codes, aka escape sequences
1568                 "\t" => '\t',   # tab            (HT)
1569                 "\n" => '\n',   # line feed      (LF)
1570                 "\r" => '\r',   # carrige return (CR)
1571                 "\f" => '\f',   # form feed      (FF)
1572                 "\b" => '\b',   # backspace      (BS)
1573                 "\a" => '\a',   # alarm (bell)   (BEL)
1574                 "\e" => '\e',   # escape         (ESC)
1575                 "\013" => '\v', # vertical tab   (VT)
1576                 "\000" => '\0', # nul character  (NUL)
1577         );
1578         my $chr = ( (exists $es{$cntrl})
1579                     ? $es{$cntrl}
1580                     : sprintf('\%2x', ord($cntrl)) );
1581         if ($opts{-nohtml}) {
1582                 return $chr;
1583         } else {
1584                 return "<span class=\"cntrl\">$chr</span>";
1585         }
1586 }
1587
1588 # Alternatively use unicode control pictures codepoints,
1589 # Unicode "printable representation" (PR)
1590 sub quot_upr {
1591         my $cntrl = shift;
1592         my %opts = @_;
1593
1594         my $chr = sprintf('&#%04d;', 0x2400+ord($cntrl));
1595         if ($opts{-nohtml}) {
1596                 return $chr;
1597         } else {
1598                 return "<span class=\"cntrl\">$chr</span>";
1599         }
1600 }
1601
1602 # git may return quoted and escaped filenames
1603 sub unquote {
1604         my $str = shift;
1605
1606         sub unq {
1607                 my $seq = shift;
1608                 my %es = ( # character escape codes, aka escape sequences
1609                         't' => "\t",   # tab            (HT, TAB)
1610                         'n' => "\n",   # newline        (NL)
1611                         'r' => "\r",   # return         (CR)
1612                         'f' => "\f",   # form feed      (FF)
1613                         'b' => "\b",   # backspace      (BS)
1614                         'a' => "\a",   # alarm (bell)   (BEL)
1615                         'e' => "\e",   # escape         (ESC)
1616                         'v' => "\013", # vertical tab   (VT)
1617                 );
1618
1619                 if ($seq =~ m/^[0-7]{1,3}$/) {
1620                         # octal char sequence
1621                         return chr(oct($seq));
1622                 } elsif (exists $es{$seq}) {
1623                         # C escape sequence, aka character escape code
1624                         return $es{$seq};
1625                 }
1626                 # quoted ordinary character
1627                 return $seq;
1628         }
1629
1630         if ($str =~ m/^"(.*)"$/) {
1631                 # needs unquoting
1632                 $str = $1;
1633                 $str =~ s/\\([^0-7]|[0-7]{1,3})/unq($1)/eg;
1634         }
1635         return $str;
1636 }
1637
1638 # escape tabs (convert tabs to spaces)
1639 sub untabify {
1640         my $line = shift;
1641
1642         while ((my $pos = index($line, "\t")) != -1) {
1643                 if (my $count = (8 - ($pos % 8))) {
1644                         my $spaces = ' ' x $count;
1645                         $line =~ s/\t/$spaces/;
1646                 }
1647         }
1648
1649         return $line;
1650 }
1651
1652 sub project_in_list {
1653         my $project = shift;
1654         my @list = git_get_projects_list();
1655         return @list && scalar(grep { $_->{'path'} eq $project } @list);
1656 }
1657
1658 ## ----------------------------------------------------------------------
1659 ## HTML aware string manipulation
1660
1661 # Try to chop given string on a word boundary between position
1662 # $len and $len+$add_len. If there is no word boundary there,
1663 # chop at $len+$add_len. Do not chop if chopped part plus ellipsis
1664 # (marking chopped part) would be longer than given string.
1665 sub chop_str {
1666         my $str = shift;
1667         my $len = shift;
1668         my $add_len = shift || 10;
1669         my $where = shift || 'right'; # 'left' | 'center' | 'right'
1670
1671         # Make sure perl knows it is utf8 encoded so we don't
1672         # cut in the middle of a utf8 multibyte char.
1673         $str = to_utf8($str);
1674
1675         # allow only $len chars, but don't cut a word if it would fit in $add_len
1676         # if it doesn't fit, cut it if it's still longer than the dots we would add
1677         # remove chopped character entities entirely
1678
1679         # when chopping in the middle, distribute $len into left and right part
1680         # return early if chopping wouldn't make string shorter
1681         if ($where eq 'center') {
1682                 return $str if ($len + 5 >= length($str)); # filler is length 5
1683                 $len = int($len/2);
1684         } else {
1685                 return $str if ($len + 4 >= length($str)); # filler is length 4
1686         }
1687
1688         # regexps: ending and beginning with word part up to $add_len
1689         my $endre = qr/.{$len}\w{0,$add_len}/;
1690         my $begre = qr/\w{0,$add_len}.{$len}/;
1691
1692         if ($where eq 'left') {
1693                 $str =~ m/^(.*?)($begre)$/;
1694                 my ($lead, $body) = ($1, $2);
1695                 if (length($lead) > 4) {
1696                         $lead = " ...";
1697                 }
1698                 return "$lead$body";
1699
1700         } elsif ($where eq 'center') {
1701                 $str =~ m/^($endre)(.*)$/;
1702                 my ($left, $str)  = ($1, $2);
1703                 $str =~ m/^(.*?)($begre)$/;
1704                 my ($mid, $right) = ($1, $2);
1705                 if (length($mid) > 5) {
1706                         $mid = " ... ";
1707                 }
1708                 return "$left$mid$right";
1709
1710         } else {
1711                 $str =~ m/^($endre)(.*)$/;
1712                 my $body = $1;
1713                 my $tail = $2;
1714                 if (length($tail) > 4) {
1715                         $tail = "... ";
1716                 }
1717                 return "$body$tail";
1718         }
1719 }
1720
1721 # takes the same arguments as chop_str, but also wraps a <span> around the
1722 # result with a title attribute if it does get chopped. Additionally, the
1723 # string is HTML-escaped.
1724 sub chop_and_escape_str {
1725         my ($str) = @_;
1726
1727         my $chopped = chop_str(@_);
1728         $str = to_utf8($str);
1729         if ($chopped eq $str) {
1730                 return esc_html($chopped);
1731         } else {
1732                 $str =~ s/[[:cntrl:]]/?/g;
1733                 return $cgi->span({-title=>$str}, esc_html($chopped));
1734         }
1735 }
1736
1737 # Highlight selected fragments of string, using given CSS class,
1738 # and escape HTML.  It is assumed that fragments do not overlap.
1739 # Regions are passed as list of pairs (array references).
1740 #
1741 # Example: esc_html_hl_regions("foobar", "mark", [ 0, 3 ]) returns
1742 # '<span class="mark">foo</span>bar'
1743 sub esc_html_hl_regions {
1744         my ($str, $css_class, @sel) = @_;
1745         my %opts = grep { ref($_) ne 'ARRAY' } @sel;
1746         @sel     = grep { ref($_) eq 'ARRAY' } @sel;
1747         return esc_html($str, %opts) unless @sel;
1748
1749         my $out = '';
1750         my $pos = 0;
1751
1752         for my $s (@sel) {
1753                 my ($begin, $end) = @$s;
1754
1755                 # Don't create empty <span> elements.
1756                 next if $end <= $begin;
1757
1758                 my $escaped = esc_html(substr($str, $begin, $end - $begin),
1759                                        %opts);
1760
1761                 $out .= esc_html(substr($str, $pos, $begin - $pos), %opts)
1762                         if ($begin - $pos > 0);
1763                 $out .= $cgi->span({-class => $css_class}, $escaped);
1764
1765                 $pos = $end;
1766         }
1767         $out .= esc_html(substr($str, $pos), %opts)
1768                 if ($pos < length($str));
1769
1770         return $out;
1771 }
1772
1773 # return positions of beginning and end of each match
1774 sub matchpos_list {
1775         my ($str, $regexp) = @_;
1776         return unless (defined $str && defined $regexp);
1777
1778         my @matches;
1779         while ($str =~ /$regexp/g) {
1780                 push @matches, [$-[0], $+[0]];
1781         }
1782         return @matches;
1783 }
1784
1785 # highlight match (if any), and escape HTML
1786 sub esc_html_match_hl {
1787         my ($str, $regexp) = @_;
1788         return esc_html($str) unless defined $regexp;
1789
1790         my @matches = matchpos_list($str, $regexp);
1791         return esc_html($str) unless @matches;
1792
1793         return esc_html_hl_regions($str, 'match', @matches);
1794 }
1795
1796
1797 # highlight match (if any) of shortened string, and escape HTML
1798 sub esc_html_match_hl_chopped {
1799         my ($str, $chopped, $regexp) = @_;
1800         return esc_html_match_hl($str, $regexp) unless defined $chopped;
1801
1802         my @matches = matchpos_list($str, $regexp);
1803         return esc_html($chopped) unless @matches;
1804
1805         # filter matches so that we mark chopped string
1806         my $tail = "... "; # see chop_str
1807         unless ($chopped =~ s/\Q$tail\E$//) {
1808                 $tail = '';
1809         }
1810         my $chop_len = length($chopped);
1811         my $tail_len = length($tail);
1812         my @filtered;
1813
1814         for my $m (@matches) {
1815                 if ($m->[0] > $chop_len) {
1816                         push @filtered, [ $chop_len, $chop_len + $tail_len ] if ($tail_len > 0);
1817                         last;
1818                 } elsif ($m->[1] > $chop_len) {
1819                         push @filtered, [ $m->[0], $chop_len + $tail_len ];
1820                         last;
1821                 }
1822                 push @filtered, $m;
1823         }
1824
1825         return esc_html_hl_regions($chopped . $tail, 'match', @filtered);
1826 }
1827
1828 ## ----------------------------------------------------------------------
1829 ## functions returning short strings
1830
1831 # CSS class for given age value (in seconds)
1832 sub age_class {
1833         my $age = shift;
1834
1835         if (!defined $age) {
1836                 return "noage";
1837         } elsif ($age < 60*60*2) {
1838                 return "age0";
1839         } elsif ($age < 60*60*24*2) {
1840                 return "age1";
1841         } else {
1842                 return "age2";
1843         }
1844 }
1845
1846 # convert age in seconds to "nn units ago" string
1847 sub age_string {
1848         my $age = shift;
1849         my $age_str;
1850
1851         if ($age > 60*60*24*365*2) {
1852                 $age_str = (int $age/60/60/24/365);
1853                 $age_str .= " years ago";
1854         } elsif ($age > 60*60*24*(365/12)*2) {
1855                 $age_str = int $age/60/60/24/(365/12);
1856                 $age_str .= " months ago";
1857         } elsif ($age > 60*60*24*7*2) {
1858                 $age_str = int $age/60/60/24/7;
1859                 $age_str .= " weeks ago";
1860         } elsif ($age > 60*60*24*2) {
1861                 $age_str = int $age/60/60/24;
1862                 $age_str .= " days ago";
1863         } elsif ($age > 60*60*2) {
1864                 $age_str = int $age/60/60;
1865                 $age_str .= " hours ago";
1866         } elsif ($age > 60*2) {
1867                 $age_str = int $age/60;
1868                 $age_str .= " min ago";
1869         } elsif ($age > 2) {
1870                 $age_str = int $age;
1871                 $age_str .= " sec ago";
1872         } else {
1873                 $age_str .= " right now";
1874         }
1875         return $age_str;
1876 }
1877
1878 use constant {
1879         S_IFINVALID => 0030000,
1880         S_IFGITLINK => 0160000,
1881 };
1882
1883 # submodule/subproject, a commit object reference
1884 sub S_ISGITLINK {
1885         my $mode = shift;
1886
1887         return (($mode & S_IFMT) == S_IFGITLINK)
1888 }
1889
1890 # convert file mode in octal to symbolic file mode string
1891 sub mode_str {
1892         my $mode = oct shift;
1893
1894         if (S_ISGITLINK($mode)) {
1895                 return 'm---------';
1896         } elsif (S_ISDIR($mode & S_IFMT)) {
1897                 return 'drwxr-xr-x';
1898         } elsif (S_ISLNK($mode)) {
1899                 return 'lrwxrwxrwx';
1900         } elsif (S_ISREG($mode)) {
1901                 # git cares only about the executable bit
1902                 if ($mode & S_IXUSR) {
1903                         return '-rwxr-xr-x';
1904                 } else {
1905                         return '-rw-r--r--';
1906                 };
1907         } else {
1908                 return '----------';
1909         }
1910 }
1911
1912 # convert file mode in octal to file type string
1913 sub file_type {
1914         my $mode = shift;
1915
1916         if ($mode !~ m/^[0-7]+$/) {
1917                 return $mode;
1918         } else {
1919                 $mode = oct $mode;
1920         }
1921
1922         if (S_ISGITLINK($mode)) {
1923                 return "submodule";
1924         } elsif (S_ISDIR($mode & S_IFMT)) {
1925                 return "directory";
1926         } elsif (S_ISLNK($mode)) {
1927                 return "symlink";
1928         } elsif (S_ISREG($mode)) {
1929                 return "file";
1930         } else {
1931                 return "unknown";
1932         }
1933 }
1934
1935 # convert file mode in octal to file type description string
1936 sub file_type_long {
1937         my $mode = shift;
1938
1939         if ($mode !~ m/^[0-7]+$/) {
1940                 return $mode;
1941         } else {
1942                 $mode = oct $mode;
1943         }
1944
1945         if (S_ISGITLINK($mode)) {
1946                 return "submodule";
1947         } elsif (S_ISDIR($mode & S_IFMT)) {
1948                 return "directory";
1949         } elsif (S_ISLNK($mode)) {
1950                 return "symlink";
1951         } elsif (S_ISREG($mode)) {
1952                 if ($mode & S_IXUSR) {
1953                         return "executable";
1954                 } else {
1955                         return "file";
1956                 };
1957         } else {
1958                 return "unknown";
1959         }
1960 }
1961
1962
1963 ## ----------------------------------------------------------------------
1964 ## functions returning short HTML fragments, or transforming HTML fragments
1965 ## which don't belong to other sections
1966
1967 # format line of commit message.
1968 sub format_log_line_html {
1969         my $line = shift;
1970
1971         $line = esc_html($line, -nbsp=>1);
1972         $line =~ s{\b([0-9a-fA-F]{8,40})\b}{
1973                 $cgi->a({-href => href(action=>"object", hash=>$1),
1974                                         -class => "text"}, $1);
1975         }eg;
1976
1977         return $line;
1978 }
1979
1980 # format marker of refs pointing to given object
1981
1982 # the destination action is chosen based on object type and current context:
1983 # - for annotated tags, we choose the tag view unless it's the current view
1984 #   already, in which case we go to shortlog view
1985 # - for other refs, we keep the current view if we're in history, shortlog or
1986 #   log view, and select shortlog otherwise
1987 sub format_ref_marker {
1988         my ($refs, $id) = @_;
1989         my $markers = '';
1990
1991         if (defined $refs->{$id}) {
1992                 foreach my $ref (@{$refs->{$id}}) {
1993                         # this code exploits the fact that non-lightweight tags are the
1994                         # only indirect objects, and that they are the only objects for which
1995                         # we want to use tag instead of shortlog as action
1996                         my ($type, $name) = qw();
1997                         my $indirect = ($ref =~ s/\^\{\}$//);
1998                         # e.g. tags/v2.6.11 or heads/next
1999                         if ($ref =~ m!^(.*?)s?/(.*)$!) {
2000                                 $type = $1;
2001                                 $name = $2;
2002                         } else {
2003                                 $type = "ref";
2004                                 $name = $ref;
2005                         }
2006
2007                         my $class = $type;
2008                         $class .= " indirect" if $indirect;
2009
2010                         my $dest_action = "shortlog";
2011
2012                         if ($indirect) {
2013                                 $dest_action = "tag" unless $action eq "tag";
2014                         } elsif ($action =~ /^(history|(short)?log)$/) {
2015                                 $dest_action = $action;
2016                         }
2017
2018                         my $dest = "";
2019                         $dest .= "refs/" unless $ref =~ m!^refs/!;
2020                         $dest .= $ref;
2021
2022                         my $link = $cgi->a({
2023                                 -href => href(
2024                                         action=>$dest_action,
2025                                         hash=>$dest
2026                                 )}, $name);
2027
2028                         $markers .= " <span class=\"".esc_attr($class)."\" title=\"".esc_attr($ref)."\">" .
2029                                 $link . "</span>";
2030                 }
2031         }
2032
2033         if ($markers) {
2034                 return ' <span class="refs">'. $markers . '</span>';
2035         } else {
2036                 return "";
2037         }
2038 }
2039
2040 # format, perhaps shortened and with markers, title line
2041 sub format_subject_html {
2042         my ($long, $short, $href, $extra) = @_;
2043         $extra = '' unless defined($extra);
2044
2045         if (length($short) < length($long)) {
2046                 $long =~ s/[[:cntrl:]]/?/g;
2047                 return $cgi->a({-href => $href, -class => "list subject",
2048                                 -title => to_utf8($long)},
2049                        esc_html($short)) . $extra;
2050         } else {
2051                 return $cgi->a({-href => $href, -class => "list subject"},
2052                        esc_html($long)) . $extra;
2053         }
2054 }
2055
2056 # Rather than recomputing the url for an email multiple times, we cache it
2057 # after the first hit. This gives a visible benefit in views where the avatar
2058 # for the same email is used repeatedly (e.g. shortlog).
2059 # The cache is shared by all avatar engines (currently gravatar only), which
2060 # are free to use it as preferred. Since only one avatar engine is used for any
2061 # given page, there's no risk for cache conflicts.
2062 our %avatar_cache = ();
2063
2064 # Compute the picon url for a given email, by using the picon search service over at
2065 # http://www.cs.indiana.edu/picons/search.html
2066 sub picon_url {
2067         my $email = lc shift;
2068         if (!$avatar_cache{$email}) {
2069                 my ($user, $domain) = split('@', $email);
2070                 $avatar_cache{$email} =
2071                         "http://www.cs.indiana.edu/cgi-pub/kinzler/piconsearch.cgi/" .
2072                         "$domain/$user/" .
2073                         "users+domains+unknown/up/single";
2074         }
2075         return $avatar_cache{$email};
2076 }
2077
2078 # Compute the gravatar url for a given email, if it's not in the cache already.
2079 # Gravatar stores only the part of the URL before the size, since that's the
2080 # one computationally more expensive. This also allows reuse of the cache for
2081 # different sizes (for this particular engine).
2082 sub gravatar_url {
2083         my $email = lc shift;
2084         my $size = shift;
2085         $avatar_cache{$email} ||=
2086                 "http://www.gravatar.com/avatar/" .
2087                         Digest::MD5::md5_hex($email) . "?s=";
2088         return $avatar_cache{$email} . $size;
2089 }
2090
2091 # Insert an avatar for the given $email at the given $size if the feature
2092 # is enabled.
2093 sub git_get_avatar {
2094         my ($email, %opts) = @_;
2095         my $pre_white  = ($opts{-pad_before} ? "&nbsp;" : "");
2096         my $post_white = ($opts{-pad_after}  ? "&nbsp;" : "");
2097         $opts{-size} ||= 'default';
2098         my $size = $avatar_size{$opts{-size}} || $avatar_size{'default'};
2099         my $url = "";
2100         if ($git_avatar eq 'gravatar') {
2101                 $url = gravatar_url($email, $size);
2102         } elsif ($git_avatar eq 'picon') {
2103                 $url = picon_url($email);
2104         }
2105         # Other providers can be added by extending the if chain, defining $url
2106         # as needed. If no variant puts something in $url, we assume avatars
2107         # are completely disabled/unavailable.
2108         if ($url) {
2109                 return $pre_white .
2110                        "<img width=\"$size\" " .
2111                             "class=\"avatar\" " .
2112                             "src=\"".esc_url($url)."\" " .
2113                             "alt=\"\" " .
2114                        "/>" . $post_white;
2115         } else {
2116                 return "";
2117         }
2118 }
2119
2120 sub format_search_author {
2121         my ($author, $searchtype, $displaytext) = @_;
2122         my $have_search = gitweb_check_feature('search');
2123
2124         if ($have_search) {
2125                 my $performed = "";
2126                 if ($searchtype eq 'author') {
2127                         $performed = "authored";
2128                 } elsif ($searchtype eq 'committer') {
2129                         $performed = "committed";
2130                 }
2131
2132                 return $cgi->a({-href => href(action=>"search", hash=>$hash,
2133                                 searchtext=>$author,
2134                                 searchtype=>$searchtype), class=>"list",
2135                                 title=>"Search for commits $performed by $author"},
2136                                 $displaytext);
2137
2138         } else {
2139                 return $displaytext;
2140         }
2141 }
2142
2143 # format the author name of the given commit with the given tag
2144 # the author name is chopped and escaped according to the other
2145 # optional parameters (see chop_str).
2146 sub format_author_html {
2147         my $tag = shift;
2148         my $co = shift;
2149         my $author = chop_and_escape_str($co->{'author_name'}, @_);
2150         return "<$tag class=\"author\">" .
2151                format_search_author($co->{'author_name'}, "author",
2152                        git_get_avatar($co->{'author_email'}, -pad_after => 1) .
2153                        $author) .
2154                "</$tag>";
2155 }
2156
2157 # format git diff header line, i.e. "diff --(git|combined|cc) ..."
2158 sub format_git_diff_header_line {
2159         my $line = shift;
2160         my $diffinfo = shift;
2161         my ($from, $to) = @_;
2162
2163         if ($diffinfo->{'nparents'}) {
2164                 # combined diff
2165                 $line =~ s!^(diff (.*?) )"?.*$!$1!;
2166                 if ($to->{'href'}) {
2167                         $line .= $cgi->a({-href => $to->{'href'}, -class => "path"},
2168                                          esc_path($to->{'file'}));
2169                 } else { # file was deleted (no href)
2170                         $line .= esc_path($to->{'file'});
2171                 }
2172         } else {
2173                 # "ordinary" diff
2174                 $line =~ s!^(diff (.*?) )"?a/.*$!$1!;
2175                 if ($from->{'href'}) {
2176                         $line .= $cgi->a({-href => $from->{'href'}, -class => "path"},
2177                                          'a/' . esc_path($from->{'file'}));
2178                 } else { # file was added (no href)
2179                         $line .= 'a/' . esc_path($from->{'file'});
2180                 }
2181                 $line .= ' ';
2182                 if ($to->{'href'}) {
2183                         $line .= $cgi->a({-href => $to->{'href'}, -class => "path"},
2184                                          'b/' . esc_path($to->{'file'}));
2185                 } else { # file was deleted
2186                         $line .= 'b/' . esc_path($to->{'file'});
2187                 }
2188         }
2189
2190         return "<div class=\"diff header\">$line</div>\n";
2191 }
2192
2193 # format extended diff header line, before patch itself
2194 sub format_extended_diff_header_line {
2195         my $line = shift;
2196         my $diffinfo = shift;
2197         my ($from, $to) = @_;
2198
2199         # match <path>
2200         if ($line =~ s!^((copy|rename) from ).*$!$1! && $from->{'href'}) {
2201                 $line .= $cgi->a({-href=>$from->{'href'}, -class=>"path"},
2202                                        esc_path($from->{'file'}));
2203         }
2204         if ($line =~ s!^((copy|rename) to ).*$!$1! && $to->{'href'}) {
2205                 $line .= $cgi->a({-href=>$to->{'href'}, -class=>"path"},
2206                                  esc_path($to->{'file'}));
2207         }
2208         # match single <mode>
2209         if ($line =~ m/\s(\d{6})$/) {
2210                 $line .= '<span class="info"> (' .
2211                          file_type_long($1) .
2212                          ')</span>';
2213         }
2214         # match <hash>
2215         if ($line =~ m/^index [0-9a-fA-F]{40},[0-9a-fA-F]{40}/) {
2216                 # can match only for combined diff
2217                 $line = 'index ';
2218                 for (my $i = 0; $i < $diffinfo->{'nparents'}; $i++) {
2219                         if ($from->{'href'}[$i]) {
2220                                 $line .= $cgi->a({-href=>$from->{'href'}[$i],
2221                                                   -class=>"hash"},
2222                                                  substr($diffinfo->{'from_id'}[$i],0,7));
2223                         } else {
2224                                 $line .= '0' x 7;
2225                         }
2226                         # separator
2227                         $line .= ',' if ($i < $diffinfo->{'nparents'} - 1);
2228                 }
2229                 $line .= '..';
2230                 if ($to->{'href'}) {
2231                         $line .= $cgi->a({-href=>$to->{'href'}, -class=>"hash"},
2232                                          substr($diffinfo->{'to_id'},0,7));
2233                 } else {
2234                         $line .= '0' x 7;
2235                 }
2236
2237         } elsif ($line =~ m/^index [0-9a-fA-F]{40}..[0-9a-fA-F]{40}/) {
2238                 # can match only for ordinary diff
2239                 my ($from_link, $to_link);
2240                 if ($from->{'href'}) {
2241                         $from_link = $cgi->a({-href=>$from->{'href'}, -class=>"hash"},
2242                                              substr($diffinfo->{'from_id'},0,7));
2243                 } else {
2244                         $from_link = '0' x 7;
2245                 }
2246                 if ($to->{'href'}) {
2247                         $to_link = $cgi->a({-href=>$to->{'href'}, -class=>"hash"},
2248                                            substr($diffinfo->{'to_id'},0,7));
2249                 } else {
2250                         $to_link = '0' x 7;
2251                 }
2252                 my ($from_id, $to_id) = ($diffinfo->{'from_id'}, $diffinfo->{'to_id'});
2253                 $line =~ s!$from_id\.\.$to_id!$from_link..$to_link!;
2254         }
2255
2256         return $line . "<br/>\n";
2257 }
2258
2259 # format from-file/to-file diff header
2260 sub format_diff_from_to_header {
2261         my ($from_line, $to_line, $diffinfo, $from, $to, @parents) = @_;
2262         my $line;
2263         my $result = '';
2264
2265         $line = $from_line;
2266         #assert($line =~ m/^---/) if DEBUG;
2267         # no extra formatting for "^--- /dev/null"
2268         if (! $diffinfo->{'nparents'}) {
2269                 # ordinary (single parent) diff
2270                 if ($line =~ m!^--- "?a/!) {
2271                         if ($from->{'href'}) {
2272                                 $line = '--- a/' .
2273                                         $cgi->a({-href=>$from->{'href'}, -class=>"path"},
2274                                                 esc_path($from->{'file'}));
2275                         } else {
2276                                 $line = '--- a/' .
2277                                         esc_path($from->{'file'});
2278                         }
2279                 }
2280                 $result .= qq!<div class="diff from_file">$line</div>\n!;
2281
2282         } else {
2283                 # combined diff (merge commit)
2284                 for (my $i = 0; $i < $diffinfo->{'nparents'}; $i++) {
2285                         if ($from->{'href'}[$i]) {
2286                                 $line = '--- ' .
2287                                         $cgi->a({-href=>href(action=>"blobdiff",
2288                                                              hash_parent=>$diffinfo->{'from_id'}[$i],
2289                                                              hash_parent_base=>$parents[$i],
2290                                                              file_parent=>$from->{'file'}[$i],
2291                                                              hash=>$diffinfo->{'to_id'},
2292                                                              hash_base=>$hash,
2293                                                              file_name=>$to->{'file'}),
2294                                                  -class=>"path",
2295                                                  -title=>"diff" . ($i+1)},
2296                                                 $i+1) .
2297                                         '/' .
2298                                         $cgi->a({-href=>$from->{'href'}[$i], -class=>"path"},
2299                                                 esc_path($from->{'file'}[$i]));
2300                         } else {
2301                                 $line = '--- /dev/null';
2302                         }
2303                         $result .= qq!<div class="diff from_file">$line</div>\n!;
2304                 }
2305         }
2306
2307         $line = $to_line;
2308         #assert($line =~ m/^\+\+\+/) if DEBUG;
2309         # no extra formatting for "^+++ /dev/null"
2310         if ($line =~ m!^\+\+\+ "?b/!) {
2311                 if ($to->{'href'}) {
2312                         $line = '+++ b/' .
2313                                 $cgi->a({-href=>$to->{'href'}, -class=>"path"},
2314                                         esc_path($to->{'file'}));
2315                 } else {
2316                         $line = '+++ b/' .
2317                                 esc_path($to->{'file'});
2318                 }
2319         }
2320         $result .= qq!<div class="diff to_file">$line</div>\n!;
2321
2322         return $result;
2323 }
2324
2325 # create note for patch simplified by combined diff
2326 sub format_diff_cc_simplified {
2327         my ($diffinfo, @parents) = @_;
2328         my $result = '';
2329
2330         $result .= "<div class=\"diff header\">" .
2331                    "diff --cc ";
2332         if (!is_deleted($diffinfo)) {
2333                 $result .= $cgi->a({-href => href(action=>"blob",
2334                                                   hash_base=>$hash,
2335                                                   hash=>$diffinfo->{'to_id'},
2336                                                   file_name=>$diffinfo->{'to_file'}),
2337                                     -class => "path"},
2338                                    esc_path($diffinfo->{'to_file'}));
2339         } else {
2340                 $result .= esc_path($diffinfo->{'to_file'});
2341         }
2342         $result .= "</div>\n" . # class="diff header"
2343                    "<div class=\"diff nodifferences\">" .
2344                    "Simple merge" .
2345                    "</div>\n"; # class="diff nodifferences"
2346
2347         return $result;
2348 }
2349
2350 sub diff_line_class {
2351         my ($line, $from, $to) = @_;
2352
2353         # ordinary diff
2354         my $num_sign = 1;
2355         # combined diff
2356         if ($from && $to && ref($from->{'href'}) eq "ARRAY") {
2357                 $num_sign = scalar @{$from->{'href'}};
2358         }
2359
2360         my @diff_line_classifier = (
2361                 { regexp => qr/^\@\@{$num_sign} /, class => "chunk_header"},
2362                 { regexp => qr/^\\/,               class => "incomplete"  },
2363                 { regexp => qr/^ {$num_sign}/,     class => "ctx" },
2364                 # classifier for context must come before classifier add/rem,
2365                 # or we would have to use more complicated regexp, for example
2366                 # qr/(?= {0,$m}\+)[+ ]{$num_sign}/, where $m = $num_sign - 1;
2367                 { regexp => qr/^[+ ]{$num_sign}/,   class => "add" },
2368                 { regexp => qr/^[- ]{$num_sign}/,   class => "rem" },
2369         );
2370         for my $clsfy (@diff_line_classifier) {
2371                 return $clsfy->{'class'}
2372                         if ($line =~ $clsfy->{'regexp'});
2373         }
2374
2375         # fallback
2376         return "";
2377 }
2378
2379 # assumes that $from and $to are defined and correctly filled,
2380 # and that $line holds a line of chunk header for unified diff
2381 sub format_unidiff_chunk_header {
2382         my ($line, $from, $to) = @_;
2383
2384         my ($from_text, $from_start, $from_lines, $to_text, $to_start, $to_lines, $section) =
2385                 $line =~ m/^\@{2} (-(\d+)(?:,(\d+))?) (\+(\d+)(?:,(\d+))?) \@{2}(.*)$/;
2386
2387         $from_lines = 0 unless defined $from_lines;
2388         $to_lines   = 0 unless defined $to_lines;
2389
2390         if ($from->{'href'}) {
2391                 $from_text = $cgi->a({-href=>"$from->{'href'}#l$from_start",
2392                                      -class=>"list"}, $from_text);
2393         }
2394         if ($to->{'href'}) {
2395                 $to_text   = $cgi->a({-href=>"$to->{'href'}#l$to_start",
2396                                      -class=>"list"}, $to_text);
2397         }
2398         $line = "<span class=\"chunk_info\">@@ $from_text $to_text @@</span>" .
2399                 "<span class=\"section\">" . esc_html($section, -nbsp=>1) . "</span>";
2400         return $line;
2401 }
2402
2403 # assumes that $from and $to are defined and correctly filled,
2404 # and that $line holds a line of chunk header for combined diff
2405 sub format_cc_diff_chunk_header {
2406         my ($line, $from, $to) = @_;
2407
2408         my ($prefix, $ranges, $section) = $line =~ m/^(\@+) (.*?) \@+(.*)$/;
2409         my (@from_text, @from_start, @from_nlines, $to_text, $to_start, $to_nlines);
2410
2411         @from_text = split(' ', $ranges);
2412         for (my $i = 0; $i < @from_text; ++$i) {
2413                 ($from_start[$i], $from_nlines[$i]) =
2414                         (split(',', substr($from_text[$i], 1)), 0);
2415         }
2416
2417         $to_text   = pop @from_text;
2418         $to_start  = pop @from_start;
2419         $to_nlines = pop @from_nlines;
2420
2421         $line = "<span class=\"chunk_info\">$prefix ";
2422         for (my $i = 0; $i < @from_text; ++$i) {
2423                 if ($from->{'href'}[$i]) {
2424                         $line .= $cgi->a({-href=>"$from->{'href'}[$i]#l$from_start[$i]",
2425                                           -class=>"list"}, $from_text[$i]);
2426                 } else {
2427                         $line .= $from_text[$i];
2428                 }
2429                 $line .= " ";
2430         }
2431         if ($to->{'href'}) {
2432                 $line .= $cgi->a({-href=>"$to->{'href'}#l$to_start",
2433                                   -class=>"list"}, $to_text);
2434         } else {
2435                 $line .= $to_text;
2436         }
2437         $line .= " $prefix</span>" .
2438                  "<span class=\"section\">" . esc_html($section, -nbsp=>1) . "</span>";
2439         return $line;
2440 }
2441
2442 # process patch (diff) line (not to be used for diff headers),
2443 # returning HTML-formatted (but not wrapped) line.
2444 # If the line is passed as a reference, it is treated as HTML and not
2445 # esc_html()'ed.
2446 sub format_diff_line {
2447         my ($line, $diff_class, $from, $to) = @_;
2448
2449         if (ref($line)) {
2450                 $line = $$line;
2451         } else {
2452                 chomp $line;
2453                 $line = untabify($line);
2454
2455                 if ($from && $to && $line =~ m/^\@{2} /) {
2456                         $line = format_unidiff_chunk_header($line, $from, $to);
2457                 } elsif ($from && $to && $line =~ m/^\@{3}/) {
2458                         $line = format_cc_diff_chunk_header($line, $from, $to);
2459                 } else {
2460                         $line = esc_html($line, -nbsp=>1);
2461                 }
2462         }
2463
2464         my $diff_classes = "diff";
2465         $diff_classes .= " $diff_class" if ($diff_class);
2466         $line = "<div class=\"$diff_classes\">$line</div>\n";
2467
2468         return $line;
2469 }
2470
2471 # Generates undef or something like "_snapshot_" or "snapshot (_tbz2_ _zip_)",
2472 # linked.  Pass the hash of the tree/commit to snapshot.
2473 sub format_snapshot_links {
2474         my ($hash) = @_;
2475         my $num_fmts = @snapshot_fmts;
2476         if ($num_fmts > 1) {
2477                 # A parenthesized list of links bearing format names.
2478                 # e.g. "snapshot (_tar.gz_ _zip_)"
2479                 return "snapshot (" . join(' ', map
2480                         $cgi->a({
2481                                 -href => href(
2482                                         action=>"snapshot",
2483                                         hash=>$hash,
2484                                         snapshot_format=>$_
2485                                 )
2486                         }, $known_snapshot_formats{$_}{'display'})
2487                 , @snapshot_fmts) . ")";
2488         } elsif ($num_fmts == 1) {
2489                 # A single "snapshot" link whose tooltip bears the format name.
2490                 # i.e. "_snapshot_"
2491                 my ($fmt) = @snapshot_fmts;
2492                 return
2493                         $cgi->a({
2494                                 -href => href(
2495                                         action=>"snapshot",
2496                                         hash=>$hash,
2497                                         snapshot_format=>$fmt
2498                                 ),
2499                                 -title => "in format: $known_snapshot_formats{$fmt}{'display'}"
2500                         }, "snapshot");
2501         } else { # $num_fmts == 0
2502                 return undef;
2503         }
2504 }
2505
2506 ## ......................................................................
2507 ## functions returning values to be passed, perhaps after some
2508 ## transformation, to other functions; e.g. returning arguments to href()
2509
2510 # returns hash to be passed to href to generate gitweb URL
2511 # in -title key it returns description of link
2512 sub get_feed_info {
2513         my $format = shift || 'Atom';
2514         my %res = (action => lc($format));
2515
2516         # feed links are possible only for project views
2517         return unless (defined $project);
2518         # some views should link to OPML, or to generic project feed,
2519         # or don't have specific feed yet (so they should use generic)
2520         return if (!$action || $action =~ /^(?:tags|heads|forks|tag|search)$/x);
2521
2522         my $branch;
2523         # branches refs uses 'refs/heads/' prefix (fullname) to differentiate
2524         # from tag links; this also makes possible to detect branch links
2525         if ((defined $hash_base && $hash_base =~ m!^refs/heads/(.*)$!) ||
2526             (defined $hash      && $hash      =~ m!^refs/heads/(.*)$!)) {
2527                 $branch = $1;
2528         }
2529         # find log type for feed description (title)
2530         my $type = 'log';
2531         if (defined $file_name) {
2532                 $type  = "history of $file_name";
2533                 $type .= "/" if ($action eq 'tree');
2534                 $type .= " on '$branch'" if (defined $branch);
2535         } else {
2536                 $type = "log of $branch" if (defined $branch);
2537         }
2538
2539         $res{-title} = $type;
2540         $res{'hash'} = (defined $branch ? "refs/heads/$branch" : undef);
2541         $res{'file_name'} = $file_name;
2542
2543         return %res;
2544 }
2545
2546 ## ----------------------------------------------------------------------
2547 ## git utility subroutines, invoking git commands
2548
2549 # returns path to the core git executable and the --git-dir parameter as list
2550 sub git_cmd {
2551         $number_of_git_cmds++;
2552         return $GIT, '--git-dir='.$git_dir;
2553 }
2554
2555 # quote the given arguments for passing them to the shell
2556 # quote_command("command", "arg 1", "arg with ' and ! characters")
2557 # => "'command' 'arg 1' 'arg with '\'' and '\!' characters'"
2558 # Try to avoid using this function wherever possible.
2559 sub quote_command {
2560         return join(' ',
2561                 map { my $a = $_; $a =~ s/(['!])/'\\$1'/g; "'$a'" } @_ );
2562 }
2563
2564 # get HEAD ref of given project as hash
2565 sub git_get_head_hash {
2566         return git_get_full_hash(shift, 'HEAD');
2567 }
2568
2569 sub git_get_full_hash {
2570         return git_get_hash(@_);
2571 }
2572
2573 sub git_get_short_hash {
2574         return git_get_hash(@_, '--short=7');
2575 }
2576
2577 sub git_get_hash {
2578         my ($project, $hash, @options) = @_;
2579         my $o_git_dir = $git_dir;
2580         my $retval = undef;
2581         $git_dir = "$projectroot/$project";
2582         if (open my $fd, '-|', git_cmd(), 'rev-parse',
2583             '--verify', '-q', @options, $hash) {
2584                 $retval = <$fd>;
2585                 chomp $retval if defined $retval;
2586                 close $fd;
2587         }
2588         if (defined $o_git_dir) {
2589                 $git_dir = $o_git_dir;
2590         }
2591         return $retval;
2592 }
2593
2594 # get type of given object
2595 sub git_get_type {
2596         my $hash = shift;
2597
2598         open my $fd, "-|", git_cmd(), "cat-file", '-t', $hash or return;
2599         my $type = <$fd>;
2600         close $fd or return;
2601         chomp $type;
2602         return $type;
2603 }
2604
2605 # repository configuration
2606 our $config_file = '';
2607 our %config;
2608
2609 # store multiple values for single key as anonymous array reference
2610 # single values stored directly in the hash, not as [ <value> ]
2611 sub hash_set_multi {
2612         my ($hash, $key, $value) = @_;
2613
2614         if (!exists $hash->{$key}) {
2615                 $hash->{$key} = $value;
2616         } elsif (!ref $hash->{$key}) {
2617                 $hash->{$key} = [ $hash->{$key}, $value ];
2618         } else {
2619                 push @{$hash->{$key}}, $value;
2620         }
2621 }
2622
2623 # return hash of git project configuration
2624 # optionally limited to some section, e.g. 'gitweb'
2625 sub git_parse_project_config {
2626         my $section_regexp = shift;
2627         my %config;
2628
2629         local $/ = "\0";
2630
2631         open my $fh, "-|", git_cmd(), "config", '-z', '-l',
2632                 or return;
2633
2634         while (my $keyval = <$fh>) {
2635                 chomp $keyval;
2636                 my ($key, $value) = split(/\n/, $keyval, 2);
2637
2638                 hash_set_multi(\%config, $key, $value)
2639                         if (!defined $section_regexp || $key =~ /^(?:$section_regexp)\./o);
2640         }
2641         close $fh;
2642
2643         return %config;
2644 }
2645
2646 # convert config value to boolean: 'true' or 'false'
2647 # no value, number > 0, 'true' and 'yes' values are true
2648 # rest of values are treated as false (never as error)
2649 sub config_to_bool {
2650         my $val = shift;
2651
2652         return 1 if !defined $val;             # section.key
2653
2654         # strip leading and trailing whitespace
2655         $val =~ s/^\s+//;
2656         $val =~ s/\s+$//;
2657
2658         return (($val =~ /^\d+$/ && $val) ||   # section.key = 1
2659                 ($val =~ /^(?:true|yes)$/i));  # section.key = true
2660 }
2661
2662 # convert config value to simple decimal number
2663 # an optional value suffix of 'k', 'm', or 'g' will cause the value
2664 # to be multiplied by 1024, 1048576, or 1073741824
2665 sub config_to_int {
2666         my $val = shift;
2667
2668         # strip leading and trailing whitespace
2669         $val =~ s/^\s+//;
2670         $val =~ s/\s+$//;
2671
2672         if (my ($num, $unit) = ($val =~ /^([0-9]*)([kmg])$/i)) {
2673                 $unit = lc($unit);
2674                 # unknown unit is treated as 1
2675                 return $num * ($unit eq 'g' ? 1073741824 :
2676                                $unit eq 'm' ?    1048576 :
2677                                $unit eq 'k' ?       1024 : 1);
2678         }
2679         return $val;
2680 }
2681
2682 # convert config value to array reference, if needed
2683 sub config_to_multi {
2684         my $val = shift;
2685
2686         return ref($val) ? $val : (defined($val) ? [ $val ] : []);
2687 }
2688
2689 sub git_get_project_config {
2690         my ($key, $type) = @_;
2691
2692         return unless defined $git_dir;
2693
2694         # key sanity check
2695         return unless ($key);
2696         # only subsection, if exists, is case sensitive,
2697         # and not lowercased by 'git config -z -l'
2698         if (my ($hi, $mi, $lo) = ($key =~ /^([^.]*)\.(.*)\.([^.]*)$/)) {
2699                 $lo =~ s/_//g;
2700                 $key = join(".", lc($hi), $mi, lc($lo));
2701                 return if ($lo =~ /\W/ || $hi =~ /\W/);
2702         } else {
2703                 $key = lc($key);
2704                 $key =~ s/_//g;
2705                 return if ($key =~ /\W/);
2706         }
2707         $key =~ s/^gitweb\.//;
2708
2709         # type sanity check
2710         if (defined $type) {
2711                 $type =~ s/^--//;
2712                 $type = undef
2713                         unless ($type eq 'bool' || $type eq 'int');
2714         }
2715
2716         # get config
2717         if (!defined $config_file ||
2718             $config_file ne "$git_dir/config") {
2719                 %config = git_parse_project_config('gitweb');
2720                 $config_file = "$git_dir/config";
2721         }
2722
2723         # check if config variable (key) exists
2724         return unless exists $config{"gitweb.$key"};
2725
2726         # ensure given type
2727         if (!defined $type) {
2728                 return $config{"gitweb.$key"};
2729         } elsif ($type eq 'bool') {
2730                 # backward compatibility: 'git config --bool' returns true/false
2731                 return config_to_bool($config{"gitweb.$key"}) ? 'true' : 'false';
2732         } elsif ($type eq 'int') {
2733                 return config_to_int($config{"gitweb.$key"});
2734         }
2735         return $config{"gitweb.$key"};
2736 }
2737
2738 # get hash of given path at given ref
2739 sub git_get_hash_by_path {
2740         my $base = shift;
2741         my $path = shift || return undef;
2742         my $type = shift;
2743
2744         $path =~ s,/+$,,;
2745
2746         open my $fd, "-|", git_cmd(), "ls-tree", $base, "--", $path
2747                 or die_error(500, "Open git-ls-tree failed");
2748         my $line = <$fd>;
2749         close $fd or return undef;
2750
2751         if (!defined $line) {
2752                 # there is no tree or hash given by $path at $base
2753                 return undef;
2754         }
2755
2756         #'100644 blob 0fa3f3a66fb6a137f6ec2c19351ed4d807070ffa  panic.c'
2757         $line =~ m/^([0-9]+) (.+) ([0-9a-fA-F]{40})\t/;
2758         if (defined $type && $type ne $2) {
2759                 # type doesn't match
2760                 return undef;
2761         }
2762         return $3;
2763 }
2764
2765 # get path of entry with given hash at given tree-ish (ref)
2766 # used to get 'from' filename for combined diff (merge commit) for renames
2767 sub git_get_path_by_hash {
2768         my $base = shift || return;
2769         my $hash = shift || return;
2770
2771         local $/ = "\0";
2772
2773         open my $fd, "-|", git_cmd(), "ls-tree", '-r', '-t', '-z', $base
2774                 or return undef;
2775         while (my $line = <$fd>) {
2776                 chomp $line;
2777
2778                 #'040000 tree 595596a6a9117ddba9fe379b6b012b558bac8423  gitweb'
2779                 #'100644 blob e02e90f0429be0d2a69b76571101f20b8f75530f  gitweb/README'
2780                 if ($line =~ m/(?:[0-9]+) (?:.+) $hash\t(.+)$/) {
2781                         close $fd;
2782                         return $1;
2783                 }
2784         }
2785         close $fd;
2786         return undef;
2787 }
2788
2789 ## ......................................................................
2790 ## git utility functions, directly accessing git repository
2791
2792 # get the value of config variable either from file named as the variable
2793 # itself in the repository ($GIT_DIR/$name file), or from gitweb.$name
2794 # configuration variable in the repository config file.
2795 sub git_get_file_or_project_config {
2796         my ($path, $name) = @_;
2797
2798         $git_dir = "$projectroot/$path";
2799         open my $fd, '<', "$git_dir/$name"
2800                 or return git_get_project_config($name);
2801         my $conf = <$fd>;
2802         close $fd;
2803         if (defined $conf) {
2804                 chomp $conf;
2805         }
2806         return $conf;
2807 }
2808
2809 sub git_get_project_description {
2810         my $path = shift;
2811         return git_get_file_or_project_config($path, 'description');
2812 }
2813
2814 sub git_get_project_category {
2815         my $path = shift;
2816         return git_get_file_or_project_config($path, 'category');
2817 }
2818
2819
2820 # supported formats:
2821 # * $GIT_DIR/ctags/<tagname> file (in 'ctags' subdirectory)
2822 #   - if its contents is a number, use it as tag weight,
2823 #   - otherwise add a tag with weight 1
2824 # * $GIT_DIR/ctags file, each line is a tag (with weight 1)
2825 #   the same value multiple times increases tag weight
2826 # * `gitweb.ctag' multi-valued repo config variable
2827 sub git_get_project_ctags {
2828         my $project = shift;
2829         my $ctags = {};
2830
2831         $git_dir = "$projectroot/$project";
2832         if (opendir my $dh, "$git_dir/ctags") {
2833                 my @files = grep { -f $_ } map { "$git_dir/ctags/$_" } readdir($dh);
2834                 foreach my $tagfile (@files) {
2835                         open my $ct, '<', $tagfile
2836                                 or next;
2837                         my $val = <$ct>;
2838                         chomp $val if $val;
2839                         close $ct;
2840
2841                         (my $ctag = $tagfile) =~ s#.*/##;
2842                         if ($val =~ /^\d+$/) {
2843                                 $ctags->{$ctag} = $val;
2844                         } else {
2845                                 $ctags->{$ctag} = 1;
2846                         }
2847                 }
2848                 closedir $dh;
2849
2850         } elsif (open my $fh, '<', "$git_dir/ctags") {
2851                 while (my $line = <$fh>) {
2852                         chomp $line;
2853                         $ctags->{$line}++ if $line;
2854                 }
2855                 close $fh;
2856
2857         } else {
2858                 my $taglist = config_to_multi(git_get_project_config('ctag'));
2859                 foreach my $tag (@$taglist) {
2860                         $ctags->{$tag}++;
2861                 }
2862         }
2863
2864         return $ctags;
2865 }
2866
2867 # return hash, where keys are content tags ('ctags'),
2868 # and values are sum of weights of given tag in every project
2869 sub git_gather_all_ctags {
2870         my $projects = shift;
2871         my $ctags = {};
2872
2873         foreach my $p (@$projects) {
2874                 foreach my $ct (keys %{$p->{'ctags'}}) {
2875                         $ctags->{$ct} += $p->{'ctags'}->{$ct};
2876                 }
2877         }
2878
2879         return $ctags;
2880 }
2881
2882 sub git_populate_project_tagcloud {
2883         my $ctags = shift;
2884
2885         # First, merge different-cased tags; tags vote on casing
2886         my %ctags_lc;
2887         foreach (keys %$ctags) {
2888                 $ctags_lc{lc $_}->{count} += $ctags->{$_};
2889                 if (not $ctags_lc{lc $_}->{topcount}
2890                     or $ctags_lc{lc $_}->{topcount} < $ctags->{$_}) {
2891                         $ctags_lc{lc $_}->{topcount} = $ctags->{$_};
2892                         $ctags_lc{lc $_}->{topname} = $_;
2893                 }
2894         }
2895
2896         my $cloud;
2897         my $matched = $input_params{'ctag'};
2898         if (eval { require HTML::TagCloud; 1; }) {
2899                 $cloud = HTML::TagCloud->new;
2900                 foreach my $ctag (sort keys %ctags_lc) {
2901                         # Pad the title with spaces so that the cloud looks
2902                         # less crammed.
2903                         my $title = esc_html($ctags_lc{$ctag}->{topname});
2904                         $title =~ s/ /&nbsp;/g;
2905                         $title =~ s/^/&nbsp;/g;
2906                         $title =~ s/$/&nbsp;/g;
2907                         if (defined $matched && $matched eq $ctag) {
2908                                 $title = qq(<span class="match">$title</span>);
2909                         }
2910                         $cloud->add($title, href(project=>undef, ctag=>$ctag),
2911                                     $ctags_lc{$ctag}->{count});
2912                 }
2913         } else {
2914                 $cloud = {};
2915                 foreach my $ctag (keys %ctags_lc) {
2916                         my $title = esc_html($ctags_lc{$ctag}->{topname}, -nbsp=>1);
2917                         if (defined $matched && $matched eq $ctag) {
2918                                 $title = qq(<span class="match">$title</span>);
2919                         }
2920                         $cloud->{$ctag}{count} = $ctags_lc{$ctag}->{count};
2921                         $cloud->{$ctag}{ctag} =
2922                                 $cgi->a({-href=>href(project=>undef, ctag=>$ctag)}, $title);
2923                 }
2924         }
2925         return $cloud;
2926 }
2927
2928 sub git_show_project_tagcloud {
2929         my ($cloud, $count) = @_;
2930         if (ref $cloud eq 'HTML::TagCloud') {
2931                 return $cloud->html_and_css($count);
2932         } else {
2933                 my @tags = sort { $cloud->{$a}->{'count'} <=> $cloud->{$b}->{'count'} } keys %$cloud;
2934                 return
2935                         '<div id="htmltagcloud"'.($project ? '' : ' align="center"').'>' .
2936                         join (', ', map {
2937                                 $cloud->{$_}->{'ctag'}
2938                         } splice(@tags, 0, $count)) .
2939                         '</div>';
2940         }
2941 }
2942
2943 sub git_get_project_url_list {
2944         my $path = shift;
2945
2946         $git_dir = "$projectroot/$path";
2947         open my $fd, '<', "$git_dir/cloneurl"
2948                 or return wantarray ?
2949                 @{ config_to_multi(git_get_project_config('url')) } :
2950                    config_to_multi(git_get_project_config('url'));
2951         my @git_project_url_list = map { chomp; $_ } <$fd>;
2952         close $fd;
2953
2954         return wantarray ? @git_project_url_list : \@git_project_url_list;
2955 }
2956
2957 sub git_get_projects_list {
2958         my $filter = shift || '';
2959         my $paranoid = shift;
2960         my @list;
2961
2962         if (-d $projects_list) {
2963                 # search in directory
2964                 my $dir = $projects_list;
2965                 # remove the trailing "/"
2966                 $dir =~ s!/+$!!;
2967                 my $pfxlen = length("$dir");
2968                 my $pfxdepth = ($dir =~ tr!/!!);
2969                 # when filtering, search only given subdirectory
2970                 if ($filter && !$paranoid) {
2971                         $dir .= "/$filter";
2972                         $dir =~ s!/+$!!;
2973                 }
2974
2975                 File::Find::find({
2976                         follow_fast => 1, # follow symbolic links
2977                         follow_skip => 2, # ignore duplicates
2978                         dangling_symlinks => 0, # ignore dangling symlinks, silently
2979                         wanted => sub {
2980                                 # global variables
2981                                 our $project_maxdepth;
2982                                 our $projectroot;
2983                                 # skip project-list toplevel, if we get it.
2984                                 return if (m!^[/.]$!);
2985                                 # only directories can be git repositories
2986                                 return unless (-d $_);
2987                                 # don't traverse too deep (Find is super slow on os x)
2988                                 # $project_maxdepth excludes depth of $projectroot
2989                                 if (($File::Find::name =~ tr!/!!) - $pfxdepth > $project_maxdepth) {
2990                                         $File::Find::prune = 1;
2991                                         return;
2992                                 }
2993
2994                                 my $path = substr($File::Find::name, $pfxlen + 1);
2995                                 # paranoidly only filter here
2996                                 if ($paranoid && $filter && $path !~ m!^\Q$filter\E/!) {
2997                                         next;
2998                                 }
2999                                 # we check related file in $projectroot
3000                                 if (check_export_ok("$projectroot/$path")) {
3001                                         push @list, { path => $path };
3002                                         $File::Find::prune = 1;
3003                                 }
3004                         },
3005                 }, "$dir");
3006
3007         } elsif (-f $projects_list) {
3008                 # read from file(url-encoded):
3009                 # 'git%2Fgit.git Linus+Torvalds'
3010                 # 'libs%2Fklibc%2Fklibc.git H.+Peter+Anvin'
3011                 # 'linux%2Fhotplug%2Fudev.git Greg+Kroah-Hartman'
3012                 open my $fd, '<', $projects_list or return;
3013         PROJECT:
3014                 while (my $line = <$fd>) {
3015                         chomp $line;
3016                         my ($path, $owner) = split ' ', $line;
3017                         $path = unescape($path);
3018                         $owner = unescape($owner);
3019                         if (!defined $path) {
3020                                 next;
3021                         }
3022                         # if $filter is rpovided, check if $path begins with $filter
3023                         if ($filter && $path !~ m!^\Q$filter\E/!) {
3024                                 next;
3025                         }
3026                         if (check_export_ok("$projectroot/$path")) {
3027                                 my $pr = {
3028                                         path => $path
3029                                 };
3030                                 if ($owner) {
3031                                         $pr->{'owner'} = to_utf8($owner);
3032                                 }
3033                                 push @list, $pr;
3034                         }
3035                 }
3036                 close $fd;
3037         }
3038         return @list;
3039 }
3040
3041 # written with help of Tree::Trie module (Perl Artistic License, GPL compatibile)
3042 # as side effects it sets 'forks' field to list of forks for forked projects
3043 sub filter_forks_from_projects_list {
3044         my $projects = shift;
3045
3046         my %trie; # prefix tree of directories (path components)
3047         # generate trie out of those directories that might contain forks
3048         foreach my $pr (@$projects) {
3049                 my $path = $pr->{'path'};
3050                 $path =~ s/\.git$//;      # forks of 'repo.git' are in 'repo/' directory
3051                 next if ($path =~ m!/$!); # skip non-bare repositories, e.g. 'repo/.git'
3052                 next unless ($path);      # skip '.git' repository: tests, git-instaweb
3053                 next unless (-d "$projectroot/$path"); # containing directory exists
3054                 $pr->{'forks'} = [];      # there can be 0 or more forks of project
3055
3056                 # add to trie
3057                 my @dirs = split('/', $path);
3058                 # walk the trie, until either runs out of components or out of trie
3059                 my $ref = \%trie;
3060                 while (scalar @dirs &&
3061                        exists($ref->{$dirs[0]})) {
3062                         $ref = $ref->{shift @dirs};
3063                 }
3064                 # create rest of trie structure from rest of components
3065                 foreach my $dir (@dirs) {
3066                         $ref = $ref->{$dir} = {};
3067                 }
3068                 # create end marker, store $pr as a data
3069                 $ref->{''} = $pr if (!exists $ref->{''});
3070         }
3071
3072         # filter out forks, by finding shortest prefix match for paths
3073         my @filtered;
3074  PROJECT:
3075         foreach my $pr (@$projects) {
3076                 # trie lookup
3077                 my $ref = \%trie;
3078         DIR:
3079                 foreach my $dir (split('/', $pr->{'path'})) {
3080                         if (exists $ref->{''}) {
3081                                 # found [shortest] prefix, is a fork - skip it
3082                                 push @{$ref->{''}{'forks'}}, $pr;
3083                                 next PROJECT;
3084                         }
3085                         if (!exists $ref->{$dir}) {
3086                                 # not in trie, cannot have prefix, not a fork
3087                                 push @filtered, $pr;
3088                                 next PROJECT;
3089                         }
3090                         # If the dir is there, we just walk one step down the trie.
3091                         $ref = $ref->{$dir};
3092                 }
3093                 # we ran out of trie
3094                 # (shouldn't happen: it's either no match, or end marker)
3095                 push @filtered, $pr;
3096         }
3097
3098         return @filtered;
3099 }
3100
3101 # note: fill_project_list_info must be run first,
3102 # for 'descr_long' and 'ctags' to be filled
3103 sub search_projects_list {
3104         my ($projlist, %opts) = @_;
3105         my $tagfilter  = $opts{'tagfilter'};
3106         my $search_re = $opts{'search_regexp'};
3107
3108         return @$projlist
3109                 unless ($tagfilter || $search_re);
3110
3111         # searching projects require filling to be run before it;
3112         fill_project_list_info($projlist,
3113                                $tagfilter  ? 'ctags' : (),
3114                                $search_re ? ('path', 'descr') : ());
3115         my @projects;
3116  PROJECT:
3117         foreach my $pr (@$projlist) {
3118
3119                 if ($tagfilter) {
3120                         next unless ref($pr->{'ctags'}) eq 'HASH';
3121                         next unless
3122                                 grep { lc($_) eq lc($tagfilter) } keys %{$pr->{'ctags'}};
3123                 }
3124
3125                 if ($search_re) {
3126                         next unless
3127                                 $pr->{'path'} =~ /$search_re/ ||
3128                                 $pr->{'descr_long'} =~ /$search_re/;
3129                 }
3130
3131                 push @projects, $pr;
3132         }
3133
3134         return @projects;
3135 }
3136
3137 our $gitweb_project_owner = undef;
3138 sub git_get_project_list_from_file {
3139
3140         return if (defined $gitweb_project_owner);
3141
3142         $gitweb_project_owner = {};
3143         # read from file (url-encoded):
3144         # 'git%2Fgit.git Linus+Torvalds'
3145         # 'libs%2Fklibc%2Fklibc.git H.+Peter+Anvin'
3146         # 'linux%2Fhotplug%2Fudev.git Greg+Kroah-Hartman'
3147         if (-f $projects_list) {
3148                 open(my $fd, '<', $projects_list);
3149                 while (my $line = <$fd>) {
3150                         chomp $line;
3151                         my ($pr, $ow) = split ' ', $line;
3152                         $pr = unescape($pr);
3153                         $ow = unescape($ow);
3154                         $gitweb_project_owner->{$pr} = to_utf8($ow);
3155                 }
3156                 close $fd;
3157         }
3158 }
3159
3160 sub git_get_project_owner {
3161         my $project = shift;
3162         my $owner;
3163
3164         return undef unless $project;
3165         $git_dir = "$projectroot/$project";
3166
3167         if (!defined $gitweb_project_owner) {
3168                 git_get_project_list_from_file();
3169         }
3170
3171         if (exists $gitweb_project_owner->{$project}) {
3172                 $owner = $gitweb_project_owner->{$project};
3173         }
3174         if (!defined $owner){
3175                 $owner = git_get_project_config('owner');
3176         }
3177         if (!defined $owner) {
3178                 $owner = get_file_owner("$git_dir");
3179         }
3180
3181         return $owner;
3182 }
3183
3184 sub git_get_last_activity {
3185         my ($path) = @_;
3186         my $fd;
3187
3188         $git_dir = "$projectroot/$path";
3189         open($fd, "-|", git_cmd(), 'for-each-ref',
3190              '--format=%(committer)',
3191              '--sort=-committerdate',
3192              '--count=1',
3193              'refs/heads') or return;
3194         my $most_recent = <$fd>;
3195         close $fd or return;
3196         if (defined $most_recent &&
3197             $most_recent =~ / (\d+) [-+][01]\d\d\d$/) {
3198                 my $timestamp = $1;
3199                 my $age = time - $timestamp;
3200                 return ($age, age_string($age));
3201         }
3202         return (undef, undef);
3203 }
3204
3205 # Implementation note: when a single remote is wanted, we cannot use 'git
3206 # remote show -n' because that command always work (assuming it's a remote URL
3207 # if it's not defined), and we cannot use 'git remote show' because that would
3208 # try to make a network roundtrip. So the only way to find if that particular
3209 # remote is defined is to walk the list provided by 'git remote -v' and stop if
3210 # and when we find what we want.
3211 sub git_get_remotes_list {
3212         my $wanted = shift;
3213         my %remotes = ();
3214
3215         open my $fd, '-|' , git_cmd(), 'remote', '-v';
3216         return unless $fd;
3217         while (my $remote = <$fd>) {
3218                 chomp $remote;
3219                 $remote =~ s!\t(.*?)\s+\((\w+)\)$!!;
3220                 next if $wanted and not $remote eq $wanted;
3221                 my ($url, $key) = ($1, $2);
3222
3223                 $remotes{$remote} ||= { 'heads' => () };
3224                 $remotes{$remote}{$key} = $url;
3225         }
3226         close $fd or return;
3227         return wantarray ? %remotes : \%remotes;
3228 }
3229
3230 # Takes a hash of remotes as first parameter and fills it by adding the
3231 # available remote heads for each of the indicated remotes.
3232 sub fill_remote_heads {
3233         my $remotes = shift;
3234         my @heads = map { "remotes/$_" } keys %$remotes;
3235         my @remoteheads = git_get_heads_list(undef, @heads);
3236         foreach my $remote (keys %$remotes) {
3237                 $remotes->{$remote}{'heads'} = [ grep {
3238                         $_->{'name'} =~ s!^$remote/!!
3239                         } @remoteheads ];
3240         }
3241 }
3242
3243 sub git_get_references {
3244         my $type = shift || "";
3245         my %refs;
3246         # 5dc01c595e6c6ec9ccda4f6f69c131c0dd945f8c refs/tags/v2.6.11
3247         # c39ae07f393806ccf406ef966e9a15afc43cc36a refs/tags/v2.6.11^{}
3248         open my $fd, "-|", git_cmd(), "show-ref", "--dereference",
3249                 ($type ? ("--", "refs/$type") : ()) # use -- <pattern> if $type
3250                 or return;
3251
3252         while (my $line = <$fd>) {
3253                 chomp $line;
3254                 if ($line =~ m!^([0-9a-fA-F]{40})\srefs/($type.*)$!) {
3255                         if (defined $refs{$1}) {
3256                                 push @{$refs{$1}}, $2;
3257                         } else {
3258                                 $refs{$1} = [ $2 ];
3259                         }
3260                 }
3261         }
3262         close $fd or return;
3263         return \%refs;
3264 }
3265
3266 sub git_get_rev_name_tags {
3267         my $hash = shift || return undef;
3268
3269         open my $fd, "-|", git_cmd(), "name-rev", "--tags", $hash
3270                 or return;
3271         my $name_rev = <$fd>;
3272         close $fd;
3273
3274         if ($name_rev =~ m|^$hash tags/(.*)$|) {
3275                 return $1;
3276         } else {
3277                 # catches also '$hash undefined' output
3278                 return undef;
3279         }
3280 }
3281
3282 ## ----------------------------------------------------------------------
3283 ## parse to hash functions
3284
3285 sub parse_date {
3286         my $epoch = shift;
3287         my $tz = shift || "-0000";
3288
3289         my %date;
3290         my @months = ("Jan", "Feb", "Mar", "Apr", "May", "Jun", "Jul", "Aug", "Sep", "Oct", "Nov", "Dec");
3291         my @days = ("Sun", "Mon", "Tue", "Wed", "Thu", "Fri", "Sat");
3292         my ($sec, $min, $hour, $mday, $mon, $year, $wday, $yday) = gmtime($epoch);
3293         $date{'hour'} = $hour;
3294         $date{'minute'} = $min;
3295         $date{'mday'} = $mday;
3296         $date{'day'} = $days[$wday];
3297         $date{'month'} = $months[$mon];
3298         $date{'rfc2822'}   = sprintf "%s, %d %s %4d %02d:%02d:%02d +0000",
3299                              $days[$wday], $mday, $months[$mon], 1900+$year, $hour ,$min, $sec;
3300         $date{'mday-time'} = sprintf "%d %s %02d:%02d",
3301                              $mday, $months[$mon], $hour ,$min;
3302         $date{'iso-8601'}  = sprintf "%04d-%02d-%02dT%02d:%02d:%02dZ",
3303                              1900+$year, 1+$mon, $mday, $hour ,$min, $sec;
3304
3305         my ($tz_sign, $tz_hour, $tz_min) =
3306                 ($tz =~ m/^([-+])(\d\d)(\d\d)$/);
3307         $tz_sign = ($tz_sign eq '-' ? -1 : +1);
3308         my $local = $epoch + $tz_sign*((($tz_hour*60) + $tz_min)*60);
3309         ($sec, $min, $hour, $mday, $mon, $year, $wday, $yday) = gmtime($local);
3310         $date{'hour_local'} = $hour;
3311         $date{'minute_local'} = $min;
3312         $date{'tz_local'} = $tz;
3313         $date{'iso-tz'} = sprintf("%04d-%02d-%02d %02d:%02d:%02d %s",
3314                                   1900+$year, $mon+1, $mday,
3315                                   $hour, $min, $sec, $tz);
3316         return %date;
3317 }
3318
3319 sub parse_tag {
3320         my $tag_id = shift;
3321         my %tag;
3322         my @comment;
3323
3324         open my $fd, "-|", git_cmd(), "cat-file", "tag", $tag_id or return;
3325         $tag{'id'} = $tag_id;
3326         while (my $line = <$fd>) {
3327                 chomp $line;
3328                 if ($line =~ m/^object ([0-9a-fA-F]{40})$/) {
3329                         $tag{'object'} = $1;
3330                 } elsif ($line =~ m/^type (.+)$/) {
3331                         $tag{'type'} = $1;
3332                 } elsif ($line =~ m/^tag (.+)$/) {
3333                         $tag{'name'} = $1;
3334                 } elsif ($line =~ m/^tagger (.*) ([0-9]+) (.*)$/) {
3335                         $tag{'author'} = $1;
3336                         $tag{'author_epoch'} = $2;
3337                         $tag{'author_tz'} = $3;
3338                         if ($tag{'author'} =~ m/^([^<]+) <([^>]*)>/) {
3339                                 $tag{'author_name'}  = $1;
3340                                 $tag{'author_email'} = $2;
3341                         } else {
3342                                 $tag{'author_name'} = $tag{'author'};
3343                         }
3344                 } elsif ($line =~ m/--BEGIN/) {
3345                         push @comment, $line;
3346                         last;
3347                 } elsif ($line eq "") {
3348                         last;
3349                 }
3350         }
3351         push @comment, <$fd>;
3352         $tag{'comment'} = \@comment;
3353         close $fd or return;
3354         if (!defined $tag{'name'}) {
3355                 return
3356         };
3357         return %tag
3358 }
3359
3360 sub parse_commit_text {
3361         my ($commit_text, $withparents) = @_;
3362         my @commit_lines = split '\n', $commit_text;
3363         my %co;
3364
3365         pop @commit_lines; # Remove '\0'
3366
3367         if (! @commit_lines) {
3368                 return;
3369         }
3370
3371         my $header = shift @commit_lines;
3372         if ($header !~ m/^[0-9a-fA-F]{40}/) {
3373                 return;
3374         }
3375         ($co{'id'}, my @parents) = split ' ', $header;
3376         while (my $line = shift @commit_lines) {
3377                 last if $line eq "\n";
3378                 if ($line =~ m/^tree ([0-9a-fA-F]{40})$/) {
3379                         $co{'tree'} = $1;
3380                 } elsif ((!defined $withparents) && ($line =~ m/^parent ([0-9a-fA-F]{40})$/)) {
3381                         push @parents, $1;
3382                 } elsif ($line =~ m/^author (.*) ([0-9]+) (.*)$/) {
3383                         $co{'author'} = to_utf8($1);
3384                         $co{'author_epoch'} = $2;
3385                         $co{'author_tz'} = $3;
3386                         if ($co{'author'} =~ m/^([^<]+) <([^>]*)>/) {
3387                                 $co{'author_name'}  = $1;
3388                                 $co{'author_email'} = $2;
3389                         } else {
3390                                 $co{'author_name'} = $co{'author'};
3391                         }
3392                 } elsif ($line =~ m/^committer (.*) ([0-9]+) (.*)$/) {
3393                         $co{'committer'} = to_utf8($1);
3394                         $co{'committer_epoch'} = $2;
3395                         $co{'committer_tz'} = $3;
3396                         if ($co{'committer'} =~ m/^([^<]+) <([^>]*)>/) {
3397                                 $co{'committer_name'}  = $1;
3398                                 $co{'committer_email'} = $2;
3399                         } else {
3400                                 $co{'committer_name'} = $co{'committer'};
3401                         }
3402                 }
3403         }
3404         if (!defined $co{'tree'}) {
3405                 return;
3406         };
3407         $co{'parents'} = \@parents;
3408         $co{'parent'} = $parents[0];
3409
3410         foreach my $title (@commit_lines) {
3411                 $title =~ s/^    //;
3412                 if ($title ne "") {
3413                         $co{'title'} = chop_str($title, 80, 5);
3414                         # remove leading stuff of merges to make the interesting part visible
3415                         if (length($title) > 50) {
3416                                 $title =~ s/^Automatic //;
3417                                 $title =~ s/^merge (of|with) /Merge ... /i;
3418                                 if (length($title) > 50) {
3419                                         $title =~ s/(http|rsync):\/\///;
3420                                 }
3421                                 if (length($title) > 50) {
3422                                         $title =~ s/(master|www|rsync)\.//;
3423                                 }
3424                                 if (length($title) > 50) {
3425                                         $title =~ s/kernel.org:?//;
3426                                 }
3427                                 if (length($title) > 50) {
3428                                         $title =~ s/\/pub\/scm//;
3429                                 }
3430                         }
3431                         $co{'title_short'} = chop_str($title, 50, 5);
3432                         last;
3433                 }
3434         }
3435         if (! defined $co{'title'} || $co{'title'} eq "") {
3436                 $co{'title'} = $co{'title_short'} = '(no commit message)';
3437         }
3438         # remove added spaces
3439         foreach my $line (@commit_lines) {
3440                 $line =~ s/^    //;
3441         }
3442         $co{'comment'} = \@commit_lines;
3443
3444         my $age = time - $co{'committer_epoch'};
3445         $co{'age'} = $age;
3446         $co{'age_string'} = age_string($age);
3447         my ($sec, $min, $hour, $mday, $mon, $year, $wday, $yday) = gmtime($co{'committer_epoch'});
3448         if ($age > 60*60*24*7*2) {
3449                 $co{'age_string_date'} = sprintf "%4i-%02u-%02i", 1900 + $year, $mon+1, $mday;
3450                 $co{'age_string_age'} = $co{'age_string'};
3451         } else {
3452                 $co{'age_string_date'} = $co{'age_string'};
3453                 $co{'age_string_age'} = sprintf "%4i-%02u-%02i", 1900 + $year, $mon+1, $mday;
3454         }
3455         return %co;
3456 }
3457
3458 sub parse_commit {
3459         my ($commit_id) = @_;
3460         my %co;
3461
3462         local $/ = "\0";
3463
3464         open my $fd, "-|", git_cmd(), "rev-list",
3465                 "--parents",
3466                 "--header",
3467                 "--max-count=1",
3468                 $commit_id,
3469                 "--",
3470                 or die_error(500, "Open git-rev-list failed");
3471         %co = parse_commit_text(<$fd>, 1);
3472         close $fd;
3473
3474         return %co;
3475 }
3476
3477 sub parse_commits {
3478         my ($commit_id, $maxcount, $skip, $filename, @args) = @_;
3479         my @cos;
3480
3481         $maxcount ||= 1;
3482         $skip ||= 0;
3483
3484         local $/ = "\0";
3485
3486         open my $fd, "-|", git_cmd(), "rev-list",
3487                 "--header",
3488                 @args,
3489                 ("--max-count=" . $maxcount),
3490                 ("--skip=" . $skip),
3491                 @extra_options,
3492                 $commit_id,
3493                 "--",
3494                 ($filename ? ($filename) : ())
3495                 or die_error(500, "Open git-rev-list failed");
3496         while (my $line = <$fd>) {
3497                 my %co = parse_commit_text($line);
3498                 push @cos, \%co;
3499         }
3500         close $fd;
3501
3502         return wantarray ? @cos : \@cos;
3503 }
3504
3505 # parse line of git-diff-tree "raw" output
3506 sub parse_difftree_raw_line {
3507         my $line = shift;
3508         my %res;
3509
3510         # ':100644 100644 03b218260e99b78c6df0ed378e59ed9205ccc96d 3b93d5e7cc7f7dd4ebed13a5cc1a4ad976fc94d8 M   ls-files.c'
3511         # ':100644 100644 7f9281985086971d3877aca27704f2aaf9c448ce bc190ebc71bbd923f2b728e505408f5e54bd073a M   rev-tree.c'
3512         if ($line =~ m/^:([0-7]{6}) ([0-7]{6}) ([0-9a-fA-F]{40}) ([0-9a-fA-F]{40}) (.)([0-9]{0,3})\t(.*)$/) {
3513                 $res{'from_mode'} = $1;
3514                 $res{'to_mode'} = $2;
3515                 $res{'from_id'} = $3;
3516                 $res{'to_id'} = $4;
3517                 $res{'status'} = $5;
3518                 $res{'similarity'} = $6;
3519                 if ($res{'status'} eq 'R' || $res{'status'} eq 'C') { # renamed or copied
3520                         ($res{'from_file'}, $res{'to_file'}) = map { unquote($_) } split("\t", $7);
3521                 } else {
3522                         $res{'from_file'} = $res{'to_file'} = $res{'file'} = unquote($7);
3523                 }
3524         }
3525         # '::100755 100755 100755 60e79ca1b01bc8b057abe17ddab484699a7f5fdb 94067cc5f73388f33722d52ae02f44692bc07490 94067cc5f73388f33722d52ae02f44692bc07490 MR git-gui/git-gui.sh'
3526         # combined diff (for merge commit)
3527         elsif ($line =~ s/^(::+)((?:[0-7]{6} )+)((?:[0-9a-fA-F]{40} )+)([a-zA-Z]+)\t(.*)$//) {
3528                 $res{'nparents'}  = length($1);
3529                 $res{'from_mode'} = [ split(' ', $2) ];
3530                 $res{'to_mode'} = pop @{$res{'from_mode'}};
3531                 $res{'from_id'} = [ split(' ', $3) ];
3532                 $res{'to_id'} = pop @{$res{'from_id'}};
3533                 $res{'status'} = [ split('', $4) ];
3534                 $res{'to_file'} = unquote($5);
3535         }
3536         # 'c512b523472485aef4fff9e57b229d9d243c967f'
3537         elsif ($line =~ m/^([0-9a-fA-F]{40})$/) {
3538                 $res{'commit'} = $1;
3539         }
3540
3541         return wantarray ? %res : \%res;
3542 }
3543
3544 # wrapper: return parsed line of git-diff-tree "raw" output
3545 # (the argument might be raw line, or parsed info)
3546 sub parsed_difftree_line {
3547         my $line_or_ref = shift;
3548
3549         if (ref($line_or_ref) eq "HASH") {
3550                 # pre-parsed (or generated by hand)
3551                 return $line_or_ref;
3552         } else {
3553                 return parse_difftree_raw_line($line_or_ref);
3554         }
3555 }
3556
3557 # parse line of git-ls-tree output
3558 sub parse_ls_tree_line {
3559         my $line = shift;
3560         my %opts = @_;
3561         my %res;
3562
3563         if ($opts{'-l'}) {
3564                 #'100644 blob 0fa3f3a66fb6a137f6ec2c19351ed4d807070ffa   16717  panic.c'
3565                 $line =~ m/^([0-9]+) (.+) ([0-9a-fA-F]{40}) +(-|[0-9]+)\t(.+)$/s;
3566
3567                 $res{'mode'} = $1;
3568                 $res{'type'} = $2;
3569                 $res{'hash'} = $3;
3570                 $res{'size'} = $4;
3571                 if ($opts{'-z'}) {
3572                         $res{'name'} = $5;
3573                 } else {
3574                         $res{'name'} = unquote($5);
3575                 }
3576         } else {
3577                 #'100644 blob 0fa3f3a66fb6a137f6ec2c19351ed4d807070ffa  panic.c'
3578                 $line =~ m/^([0-9]+) (.+) ([0-9a-fA-F]{40})\t(.+)$/s;
3579
3580                 $res{'mode'} = $1;
3581                 $res{'type'} = $2;
3582                 $res{'hash'} = $3;
3583                 if ($opts{'-z'}) {
3584                         $res{'name'} = $4;
3585                 } else {
3586                         $res{'name'} = unquote($4);
3587                 }
3588         }
3589
3590         return wantarray ? %res : \%res;
3591 }
3592
3593 # generates _two_ hashes, references to which are passed as 2 and 3 argument
3594 sub parse_from_to_diffinfo {
3595         my ($diffinfo, $from, $to, @parents) = @_;
3596
3597         if ($diffinfo->{'nparents'}) {
3598                 # combined diff
3599                 $from->{'file'} = [];
3600                 $from->{'href'} = [];
3601                 fill_from_file_info($diffinfo, @parents)
3602                         unless exists $diffinfo->{'from_file'};
3603                 for (my $i = 0; $i < $diffinfo->{'nparents'}; $i++) {
3604                         $from->{'file'}[$i] =
3605                                 defined $diffinfo->{'from_file'}[$i] ?
3606                                         $diffinfo->{'from_file'}[$i] :
3607                                         $diffinfo->{'to_file'};
3608                         if ($diffinfo->{'status'}[$i] ne "A") { # not new (added) file
3609                                 $from->{'href'}[$i] = href(action=>"blob",
3610                                                            hash_base=>$parents[$i],
3611                                                            hash=>$diffinfo->{'from_id'}[$i],
3612                                                            file_name=>$from->{'file'}[$i]);
3613                         } else {
3614                                 $from->{'href'}[$i] = undef;
3615                         }
3616                 }
3617         } else {
3618                 # ordinary (not combined) diff
3619                 $from->{'file'} = $diffinfo->{'from_file'};
3620                 if ($diffinfo->{'status'} ne "A") { # not new (added) file
3621                         $from->{'href'} = href(action=>"blob", hash_base=>$hash_parent,
3622                                                hash=>$diffinfo->{'from_id'},
3623                                                file_name=>$from->{'file'});
3624                 } else {
3625                         delete $from->{'href'};
3626                 }
3627         }
3628
3629         $to->{'file'} = $diffinfo->{'to_file'};
3630         if (!is_deleted($diffinfo)) { # file exists in result
3631                 $to->{'href'} = href(action=>"blob", hash_base=>$hash,
3632                                      hash=>$diffinfo->{'to_id'},
3633                                      file_name=>$to->{'file'});
3634         } else {
3635                 delete $to->{'href'};
3636         }
3637 }
3638
3639 ## ......................................................................
3640 ## parse to array of hashes functions
3641
3642 sub git_get_heads_list {
3643         my ($limit, @classes) = @_;
3644         @classes = ('heads') unless @classes;
3645         my @patterns = map { "refs/$_" } @classes;
3646         my @headslist;
3647
3648         open my $fd, '-|', git_cmd(), 'for-each-ref',
3649                 ($limit ? '--count='.($limit+1) : ()), '--sort=-committerdate',
3650                 '--format=%(objectname) %(refname) %(subject)%00%(committer)',
3651                 @patterns
3652                 or return;
3653         while (my $line = <$fd>) {
3654                 my %ref_item;
3655
3656                 chomp $line;
3657                 my ($refinfo, $committerinfo) = split(/\0/, $line);
3658                 my ($hash, $name, $title) = split(' ', $refinfo, 3);
3659                 my ($committer, $epoch, $tz) =
3660                         ($committerinfo =~ /^(.*) ([0-9]+) (.*)$/);
3661                 $ref_item{'fullname'}  = $name;
3662                 $name =~ s!^refs/(?:head|remote)s/!!;
3663
3664                 $ref_item{'name'}  = $name;
3665                 $ref_item{'id'}    = $hash;
3666                 $ref_item{'title'} = $title || '(no commit message)';
3667                 $ref_item{'epoch'} = $epoch;
3668                 if ($epoch) {
3669                         $ref_item{'age'} = age_string(time - $ref_item{'epoch'});
3670                 } else {
3671                         $ref_item{'age'} = "unknown";
3672                 }
3673
3674                 push @headslist, \%ref_item;
3675         }
3676         close $fd;
3677
3678         return wantarray ? @headslist : \@headslist;
3679 }
3680
3681 sub git_get_tags_list {
3682         my $limit = shift;
3683         my @tagslist;
3684
3685         open my $fd, '-|', git_cmd(), 'for-each-ref',
3686                 ($limit ? '--count='.($limit+1) : ()), '--sort=-creatordate',
3687                 '--format=%(objectname) %(objecttype) %(refname) '.
3688                 '%(*objectname) %(*objecttype) %(subject)%00%(creator)',
3689                 'refs/tags'
3690                 or return;
3691         while (my $line = <$fd>) {
3692                 my %ref_item;
3693
3694                 chomp $line;
3695                 my ($refinfo, $creatorinfo) = split(/\0/, $line);
3696                 my ($id, $type, $name, $refid, $reftype, $title) = split(' ', $refinfo, 6);
3697                 my ($creator, $epoch, $tz) =
3698                         ($creatorinfo =~ /^(.*) ([0-9]+) (.*)$/);
3699                 $ref_item{'fullname'} = $name;
3700                 $name =~ s!^refs/tags/!!;
3701
3702                 $ref_item{'type'} = $type;
3703                 $ref_item{'id'} = $id;
3704                 $ref_item{'name'} = $name;
3705                 if ($type eq "tag") {
3706                         $ref_item{'subject'} = $title;
3707                         $ref_item{'reftype'} = $reftype;
3708                         $ref_item{'refid'}   = $refid;
3709                 } else {
3710                         $ref_item{'reftype'} = $type;
3711                         $ref_item{'refid'}   = $id;
3712                 }
3713
3714                 if ($type eq "tag" || $type eq "commit") {
3715                         $ref_item{'epoch'} = $epoch;
3716                         if ($epoch) {
3717                                 $ref_item{'age'} = age_string(time - $ref_item{'epoch'});
3718                         } else {
3719                                 $ref_item{'age'} = "unknown";
3720                         }
3721                 }
3722
3723                 push @tagslist, \%ref_item;
3724         }
3725         close $fd;
3726
3727         return wantarray ? @tagslist : \@tagslist;
3728 }
3729
3730 ## ----------------------------------------------------------------------
3731 ## filesystem-related functions
3732
3733 sub get_file_owner {
3734         my $path = shift;
3735
3736         my ($dev, $ino, $mode, $nlink, $st_uid, $st_gid, $rdev, $size) = stat($path);
3737         my ($name, $passwd, $uid, $gid, $quota, $comment, $gcos, $dir, $shell) = getpwuid($st_uid);
3738         if (!defined $gcos) {
3739                 return undef;
3740         }
3741         my $owner = $gcos;
3742         $owner =~ s/[,;].*$//;
3743         return to_utf8($owner);
3744 }
3745
3746 # assume that file exists
3747 sub insert_file {
3748         my $filename = shift;
3749
3750         open my $fd, '<', $filename;
3751         print map { to_utf8($_) } <$fd>;
3752         close $fd;
3753 }
3754
3755 ## ......................................................................
3756 ## mimetype related functions
3757
3758 sub mimetype_guess_file {
3759         my $filename = shift;
3760         my $mimemap = shift;
3761         -r $mimemap or return undef;
3762
3763         my %mimemap;
3764         open(my $mh, '<', $mimemap) or return undef;
3765         while (<$mh>) {
3766                 next if m/^#/; # skip comments
3767                 my ($mimetype, @exts) = split(/\s+/);
3768                 foreach my $ext (@exts) {
3769                         $mimemap{$ext} = $mimetype;
3770                 }
3771         }
3772         close($mh);
3773
3774         $filename =~ /\.([^.]*)$/;
3775         return $mimemap{$1};
3776 }
3777
3778 sub mimetype_guess {
3779         my $filename = shift;
3780         my $mime;
3781         $filename =~ /\./ or return undef;
3782
3783         if ($mimetypes_file) {
3784                 my $file = $mimetypes_file;
3785                 if ($file !~ m!^/!) { # if it is relative path
3786                         # it is relative to project
3787                         $file = "$projectroot/$project/$file";
3788                 }
3789                 $mime = mimetype_guess_file($filename, $file);
3790         }
3791         $mime ||= mimetype_guess_file($filename, '/etc/mime.types');
3792         return $mime;
3793 }
3794
3795 sub blob_mimetype {
3796         my $fd = shift;
3797         my $filename = shift;
3798
3799         if ($filename) {
3800                 my $mime = mimetype_guess($filename);
3801                 $mime and return $mime;
3802         }
3803
3804         # just in case
3805         return $default_blob_plain_mimetype unless $fd;
3806
3807         if (-T $fd) {
3808                 return 'text/plain';
3809         } elsif (! $filename) {
3810                 return 'application/octet-stream';
3811         } elsif ($filename =~ m/\.png$/i) {
3812                 return 'image/png';
3813         } elsif ($filename =~ m/\.gif$/i) {
3814                 return 'image/gif';
3815         } elsif ($filename =~ m/\.jpe?g$/i) {
3816                 return 'image/jpeg';
3817         } else {
3818                 return 'application/octet-stream';
3819         }
3820 }
3821
3822 sub blob_contenttype {
3823         my ($fd, $file_name, $type) = @_;
3824
3825         $type ||= blob_mimetype($fd, $file_name);
3826         if ($type eq 'text/plain' && defined $default_text_plain_charset) {
3827                 $type .= "; charset=$default_text_plain_charset";
3828         }
3829
3830         return $type;
3831 }
3832
3833 # guess file syntax for syntax highlighting; return undef if no highlighting
3834 # the name of syntax can (in the future) depend on syntax highlighter used
3835 sub guess_file_syntax {
3836         my ($highlight, $mimetype, $file_name) = @_;
3837         return undef unless ($highlight && defined $file_name);
3838         my $basename = basename($file_name, '.in');
3839         return $highlight_basename{$basename}
3840                 if exists $highlight_basename{$basename};
3841
3842         $basename =~ /\.([^.]*)$/;
3843         my $ext = $1 or return undef;
3844         return $highlight_ext{$ext}
3845                 if exists $highlight_ext{$ext};
3846
3847         return undef;
3848 }
3849
3850 # run highlighter and return FD of its output,
3851 # or return original FD if no highlighting
3852 sub run_highlighter {
3853         my ($fd, $highlight, $syntax) = @_;
3854         return $fd unless ($highlight && defined $syntax);
3855
3856         close $fd;
3857         open $fd, quote_command(git_cmd(), "cat-file", "blob", $hash)." | ".
3858                   quote_command($highlight_bin).
3859                   " --replace-tabs=8 --fragment --syntax $syntax |"
3860                 or die_error(500, "Couldn't open file or run syntax highlighter");
3861         return $fd;
3862 }
3863
3864 ## ======================================================================
3865 ## functions printing HTML: header, footer, error page
3866
3867 sub get_page_title {
3868         my $title = to_utf8($site_name);
3869
3870         unless (defined $project) {
3871                 if (defined $project_filter) {
3872                         $title .= " - projects in '" . esc_path($project_filter) . "'";
3873                 }
3874                 return $title;
3875         }
3876         $title .= " - " . to_utf8($project);
3877
3878         return $title unless (defined $action);
3879         $title .= "/$action"; # $action is US-ASCII (7bit ASCII)
3880
3881         return $title unless (defined $file_name);
3882         $title .= " - " . esc_path($file_name);
3883         if ($action eq "tree" && $file_name !~ m|/$|) {
3884                 $title .= "/";
3885         }
3886
3887         return $title;
3888 }
3889
3890 sub get_content_type_html {
3891         # require explicit support from the UA if we are to send the page as
3892         # 'application/xhtml+xml', otherwise send it as plain old 'text/html'.
3893         # we have to do this because MSIE sometimes globs '*/*', pretending to
3894         # support xhtml+xml but choking when it gets what it asked for.
3895         if (defined $cgi->http('HTTP_ACCEPT') &&
3896             $cgi->http('HTTP_ACCEPT') =~ m/(,|;|\s|^)application\/xhtml\+xml(,|;|\s|$)/ &&
3897             $cgi->Accept('application/xhtml+xml') != 0) {
3898                 return 'application/xhtml+xml';
3899         } else {
3900                 return 'text/html';
3901         }
3902 }
3903
3904 sub print_feed_meta {
3905         if (defined $project) {
3906                 my %href_params = get_feed_info();
3907                 if (!exists $href_params{'-title'}) {
3908                         $href_params{'-title'} = 'log';
3909                 }
3910
3911                 foreach my $format (qw(RSS Atom)) {
3912                         my $type = lc($format);
3913                         my %link_attr = (
3914                                 '-rel' => 'alternate',
3915                                 '-title' => esc_attr("$project - $href_params{'-title'} - $format feed"),
3916                                 '-type' => "application/$type+xml"
3917                         );
3918
3919                         $href_params{'extra_options'} = undef;
3920                         $href_params{'action'} = $type;
3921                         $link_attr{'-href'} = href(%href_params);
3922                         print "<link ".
3923                               "rel=\"$link_attr{'-rel'}\" ".
3924                               "title=\"$link_attr{'-title'}\" ".
3925                               "href=\"$link_attr{'-href'}\" ".
3926                               "type=\"$link_attr{'-type'}\" ".
3927                               "/>\n";
3928
3929                         $href_params{'extra_options'} = '--no-merges';
3930                         $link_attr{'-href'} = href(%href_params);
3931                         $link_attr{'-title'} .= ' (no merges)';
3932                         print "<link ".
3933                               "rel=\"$link_attr{'-rel'}\" ".
3934                               "title=\"$link_attr{'-title'}\" ".
3935                               "href=\"$link_attr{'-href'}\" ".
3936                               "type=\"$link_attr{'-type'}\" ".
3937                               "/>\n";
3938                 }
3939
3940         } else {
3941                 printf('<link rel="alternate" title="%s projects list" '.
3942                        'href="%s" type="text/plain; charset=utf-8" />'."\n",
3943                        esc_attr($site_name), href(project=>undef, action=>"project_index"));
3944                 printf('<link rel="alternate" title="%s projects feeds" '.
3945                        'href="%s" type="text/x-opml" />'."\n",
3946                        esc_attr($site_name), href(project=>undef, action=>"opml"));
3947         }
3948 }
3949
3950 sub print_header_links {
3951         my $status = shift;
3952
3953         # print out each stylesheet that exist, providing backwards capability
3954         # for those people who defined $stylesheet in a config file
3955         if (defined $stylesheet) {
3956                 print '<link rel="stylesheet" type="text/css" href="'.esc_url($stylesheet).'"/>'."\n";
3957         } else {
3958                 foreach my $stylesheet (@stylesheets) {
3959                         next unless $stylesheet;
3960                         print '<link rel="stylesheet" type="text/css" href="'.esc_url($stylesheet).'"/>'."\n";
3961                 }
3962         }
3963         print_feed_meta()
3964                 if ($status eq '200 OK');
3965         if (defined $favicon) {
3966                 print qq(<link rel="shortcut icon" href=").esc_url($favicon).qq(" type="image/png" />\n);
3967         }
3968 }
3969
3970 sub print_nav_breadcrumbs_path {
3971         my $dirprefix = undef;
3972         while (my $part = shift) {
3973                 $dirprefix .= "/" if defined $dirprefix;
3974                 $dirprefix .= $part;
3975                 print $cgi->a({-href => href(project => undef,
3976                                              project_filter => $dirprefix,
3977                                              action => "project_list")},
3978                               esc_html($part)) . " / ";
3979         }
3980 }
3981
3982 sub print_nav_breadcrumbs {
3983         my %opts = @_;
3984
3985         print $cgi->a({-href => esc_url($home_link)}, $home_link_str) . " / ";
3986         if (defined $project) {
3987                 my @dirname = split '/', $project;
3988                 my $projectbasename = pop @dirname;
3989                 print_nav_breadcrumbs_path(@dirname);
3990                 print $cgi->a({-href => href(action=>"summary")}, esc_html($projectbasename));
3991                 if (defined $action) {
3992                         my $action_print = $action ;
3993                         if (defined $opts{-action_extra}) {
3994                                 $action_print = $cgi->a({-href => href(action=>$action)},
3995                                         $action);
3996                         }
3997                         print " / $action_print";
3998                 }
3999                 if (defined $opts{-action_extra}) {
4000                         print " / $opts{-action_extra}";
4001                 }
4002                 print "\n";
4003         } elsif (defined $project_filter) {
4004                 print_nav_breadcrumbs_path(split '/', $project_filter);
4005         }
4006 }
4007
4008 sub print_search_form {
4009         if (!defined $searchtext) {
4010                 $searchtext = "";
4011         }
4012         my $search_hash;
4013         if (defined $hash_base) {
4014                 $search_hash = $hash_base;
4015         } elsif (defined $hash) {
4016                 $search_hash = $hash;
4017         } else {
4018                 $search_hash = "HEAD";
4019         }
4020         my $action = $my_uri;
4021         my $use_pathinfo = gitweb_check_feature('pathinfo');
4022         if ($use_pathinfo) {
4023                 $action .= "/".esc_url($project);
4024         }
4025         print $cgi->startform(-method => "get", -action => $action) .
4026               "<div class=\"search\">\n" .
4027               (!$use_pathinfo &&
4028               $cgi->input({-name=>"p", -value=>$project, -type=>"hidden"}) . "\n") .
4029               $cgi->input({-name=>"a", -value=>"search", -type=>"hidden"}) . "\n" .
4030               $cgi->input({-name=>"h", -value=>$search_hash, -type=>"hidden"}) . "\n" .
4031               $cgi->popup_menu(-name => 'st', -default => 'commit',
4032                                -values => ['commit', 'grep', 'author', 'committer', 'pickaxe']) .
4033               $cgi->sup($cgi->a({-href => href(action=>"search_help")}, "?")) .
4034               " search:\n",
4035               $cgi->textfield(-name => "s", -value => $searchtext, -override => 1) . "\n" .
4036               "<span title=\"Extended regular expression\">" .
4037               $cgi->checkbox(-name => 'sr', -value => 1, -label => 're',
4038                              -checked => $search_use_regexp) .
4039               "</span>" .
4040               "</div>" .
4041               $cgi->end_form() . "\n";
4042 }
4043
4044 sub git_header_html {
4045         my $status = shift || "200 OK";
4046         my $expires = shift;
4047         my %opts = @_;
4048
4049         my $title = get_page_title();
4050         my $content_type = get_content_type_html();
4051         print $cgi->header(-type=>$content_type, -charset => 'utf-8',
4052                            -status=> $status, -expires => $expires)
4053                 unless ($opts{'-no_http_header'});
4054         my $mod_perl_version = $ENV{'MOD_PERL'} ? " $ENV{'MOD_PERL'}" : '';
4055         print <<EOF;
4056 <?xml version="1.0" encoding="utf-8"?>
4057 <!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Strict//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-strict.dtd">
4058 <html xmlns="http://www.w3.org/1999/xhtml" xml:lang="en-US" lang="en-US">
4059 <!-- git web interface version $version, (C) 2005-2006, Kay Sievers <kay.sievers\@vrfy.org>, Christian Gierke -->
4060 <!-- git core binaries version $git_version -->
4061 <head>
4062 <meta http-equiv="content-type" content="$content_type; charset=utf-8"/>
4063 <meta name="generator" content="gitweb/$version git/$git_version$mod_perl_version"/>
4064 <meta name="robots" content="index, nofollow"/>
4065 <title>$title</title>
4066 EOF
4067         # the stylesheet, favicon etc urls won't work correctly with path_info
4068         # unless we set the appropriate base URL
4069         if ($ENV{'PATH_INFO'}) {
4070                 print "<base href=\"".esc_url($base_url)."\" />\n";
4071         }
4072         print_header_links($status);
4073
4074         if (defined $site_html_head_string) {
4075                 print to_utf8($site_html_head_string);
4076         }
4077
4078         print "</head>\n" .
4079               "<body>\n";
4080
4081         if (defined $site_header && -f $site_header) {
4082                 insert_file($site_header);
4083         }
4084
4085         print "<div class=\"page_header\">\n";
4086         if (defined $logo) {
4087                 print $cgi->a({-href => esc_url($logo_url),
4088                                -title => $logo_label},
4089                               $cgi->img({-src => esc_url($logo),
4090                                          -width => 72, -height => 27,
4091                                          -alt => "git",
4092                                          -class => "logo"}));
4093         }
4094         print_nav_breadcrumbs(%opts);
4095         print "</div>\n";
4096
4097         my $have_search = gitweb_check_feature('search');
4098         if (defined $project && $have_search) {
4099                 print_search_form();
4100         }
4101 }
4102
4103 sub git_footer_html {
4104         my $feed_class = 'rss_logo';
4105
4106         print "<div class=\"page_footer\">\n";
4107         if (defined $project) {
4108                 my $descr = git_get_project_description($project);
4109                 if (defined $descr) {
4110                         print "<div class=\"page_footer_text\">" . esc_html($descr) . "</div>\n";
4111                 }
4112
4113                 my %href_params = get_feed_info();
4114                 if (!%href_params) {
4115                         $feed_class .= ' generic';
4116                 }
4117                 $href_params{'-title'} ||= 'log';
4118
4119                 foreach my $format (qw(RSS Atom)) {
4120                         $href_params{'action'} = lc($format);
4121                         print $cgi->a({-href => href(%href_params),
4122                                       -title => "$href_params{'-title'} $format feed",
4123                                       -class => $feed_class}, $format)."\n";
4124                 }
4125
4126         } else {
4127                 print $cgi->a({-href => href(project=>undef, action=>"opml",
4128                                              project_filter => $project_filter),
4129                               -class => $feed_class}, "OPML") . " ";
4130                 print $cgi->a({-href => href(project=>undef, action=>"project_index",
4131                                              project_filter => $project_filter),
4132                               -class => $feed_class}, "TXT") . "\n";
4133         }
4134         print "</div>\n"; # class="page_footer"
4135
4136         if (defined $t0 && gitweb_check_feature('timed')) {
4137                 print "<div id=\"generating_info\">\n";
4138                 print 'This page took '.
4139                       '<span id="generating_time" class="time_span">'.
4140                       tv_interval($t0, [ gettimeofday() ]).
4141                       ' seconds </span>'.
4142                       ' and '.
4143                       '<span id="generating_cmd">'.
4144                       $number_of_git_cmds.
4145                       '</span> git commands '.
4146                       " to generate.\n";
4147                 print "</div>\n"; # class="page_footer"
4148         }
4149
4150         if (defined $site_footer && -f $site_footer) {
4151                 insert_file($site_footer);
4152         }
4153
4154         print qq!<script type="text/javascript" src="!.esc_url($javascript).qq!"></script>\n!;
4155         if (defined $action &&
4156             $action eq 'blame_incremental') {
4157                 print qq!<script type="text/javascript">\n!.
4158                       qq!startBlame("!. href(action=>"blame_data", -replay=>1) .qq!",\n!.
4159                       qq!           "!. href() .qq!");\n!.
4160                       qq!</script>\n!;
4161         } else {
4162                 my ($jstimezone, $tz_cookie, $datetime_class) =
4163                         gitweb_get_feature('javascript-timezone');
4164
4165                 print qq!<script type="text/javascript">\n!.
4166                       qq!window.onload = function () {\n!;
4167                 if (gitweb_check_feature('javascript-actions')) {
4168                         print qq!       fixLinks();\n!;
4169                 }
4170                 if ($jstimezone && $tz_cookie && $datetime_class) {
4171                         print qq!       var tz_cookie = { name: '$tz_cookie', expires: 14, path: '/' };\n!. # in days
4172                               qq!       onloadTZSetup('$jstimezone', tz_cookie, '$datetime_class');\n!;
4173                 }
4174                 print qq!};\n!.
4175                       qq!</script>\n!;
4176         }
4177
4178         print "</body>\n" .
4179               "</html>";
4180 }
4181
4182 # die_error(<http_status_code>, <error_message>[, <detailed_html_description>])
4183 # Example: die_error(404, 'Hash not found')
4184 # By convention, use the following status codes (as defined in RFC 2616):
4185 # 400: Invalid or missing CGI parameters, or
4186 #      requested object exists but has wrong type.
4187 # 403: Requested feature (like "pickaxe" or "snapshot") not enabled on
4188 #      this server or project.
4189 # 404: Requested object/revision/project doesn't exist.
4190 # 500: The server isn't configured properly, or
4191 #      an internal error occurred (e.g. failed assertions caused by bugs), or
4192 #      an unknown error occurred (e.g. the git binary died unexpectedly).
4193 # 503: The server is currently unavailable (because it is overloaded,
4194 #      or down for maintenance).  Generally, this is a temporary state.
4195 sub die_error {
4196         my $status = shift || 500;
4197         my $error = esc_html(shift) || "Internal Server Error";
4198         my $extra = shift;
4199         my %opts = @_;
4200
4201         my %http_responses = (
4202                 400 => '400 Bad Request',
4203                 403 => '403 Forbidden',
4204                 404 => '404 Not Found',
4205                 500 => '500 Internal Server Error',
4206                 503 => '503 Service Unavailable',
4207         );
4208         git_header_html($http_responses{$status}, undef, %opts);
4209         print <<EOF;
4210 <div class="page_body">
4211 <br /><br />
4212 $status - $error
4213 <br />
4214 EOF
4215         if (defined $extra) {
4216                 print "<hr />\n" .
4217                       "$extra\n";
4218         }
4219         print "</div>\n";
4220
4221         git_footer_html();
4222         goto DONE_GITWEB
4223                 unless ($opts{'-error_handler'});
4224 }
4225
4226 ## ----------------------------------------------------------------------
4227 ## functions printing or outputting HTML: navigation
4228
4229 sub git_print_page_nav {
4230         my ($current, $suppress, $head, $treehead, $treebase, $extra) = @_;
4231         $extra = '' if !defined $extra; # pager or formats
4232
4233         my @navs = qw(summary shortlog log commit commitdiff tree);
4234         if ($suppress) {
4235                 @navs = grep { $_ ne $suppress } @navs;
4236         }
4237
4238         my %arg = map { $_ => {action=>$_} } @navs;
4239         if (defined $head) {
4240                 for (qw(commit commitdiff)) {
4241                         $arg{$_}{'hash'} = $head;
4242                 }
4243                 if ($current =~ m/^(tree | log | shortlog | commit | commitdiff | search)$/x) {
4244                         for (qw(shortlog log)) {
4245                                 $arg{$_}{'hash'} = $head;
4246                         }
4247                 }
4248         }
4249
4250         $arg{'tree'}{'hash'} = $treehead if defined $treehead;
4251         $arg{'tree'}{'hash_base'} = $treebase if defined $treebase;
4252
4253         my @actions = gitweb_get_feature('actions');
4254         my %repl = (
4255                 '%' => '%',
4256                 'n' => $project,         # project name
4257                 'f' => $git_dir,         # project path within filesystem
4258                 'h' => $treehead || '',  # current hash ('h' parameter)
4259                 'b' => $treebase || '',  # hash base ('hb' parameter)
4260         );
4261         while (@actions) {
4262                 my ($label, $link, $pos) = splice(@actions,0,3);
4263                 # insert
4264                 @navs = map { $_ eq $pos ? ($_, $label) : $_ } @navs;
4265                 # munch munch
4266                 $link =~ s/%([%nfhb])/$repl{$1}/g;
4267                 $arg{$label}{'_href'} = $link;
4268         }
4269
4270         print "<div class=\"page_nav\">\n" .
4271                 (join " | ",
4272                  map { $_ eq $current ?
4273                        $_ : $cgi->a({-href => ($arg{$_}{_href} ? $arg{$_}{_href} : href(%{$arg{$_}}))}, "$_")
4274                  } @navs);
4275         print "<br/>\n$extra<br/>\n" .
4276               "</div>\n";
4277 }
4278
4279 # returns a submenu for the nagivation of the refs views (tags, heads,
4280 # remotes) with the current view disabled and the remotes view only
4281 # available if the feature is enabled
4282 sub format_ref_views {
4283         my ($current) = @_;
4284         my @ref_views = qw{tags heads};
4285         push @ref_views, 'remotes' if gitweb_check_feature('remote_heads');
4286         return join " | ", map {
4287                 $_ eq $current ? $_ :
4288                 $cgi->a({-href => href(action=>$_)}, $_)
4289         } @ref_views
4290 }
4291
4292 sub format_paging_nav {
4293         my ($action, $page, $has_next_link) = @_;
4294         my $paging_nav;
4295
4296
4297         if ($page > 0) {
4298                 $paging_nav .=
4299                         $cgi->a({-href => href(-replay=>1, page=>undef)}, "first") .
4300                         " &sdot; " .
4301                         $cgi->a({-href => href(-replay=>1, page=>$page-1),
4302                                  -accesskey => "p", -title => "Alt-p"}, "prev");
4303         } else {
4304                 $paging_nav .= "first &sdot; prev";
4305         }
4306
4307         if ($has_next_link) {
4308                 $paging_nav .= " &sdot; " .
4309                         $cgi->a({-href => href(-replay=>1, page=>$page+1),
4310                                  -accesskey => "n", -title => "Alt-n"}, "next");
4311         } else {
4312                 $paging_nav .= " &sdot; next";
4313         }
4314
4315         return $paging_nav;
4316 }
4317
4318 ## ......................................................................
4319 ## functions printing or outputting HTML: div
4320
4321 sub git_print_header_div {
4322         my ($action, $title, $hash, $hash_base) = @_;
4323         my %args = ();
4324
4325         $args{'action'} = $action;
4326         $args{'hash'} = $hash if $hash;
4327         $args{'hash_base'} = $hash_base if $hash_base;
4328
4329         print "<div class=\"header\">\n" .
4330               $cgi->a({-href => href(%args), -class => "title"},
4331               $title ? $title : $action) .
4332               "\n</div>\n";
4333 }
4334
4335 sub format_repo_url {
4336         my ($name, $url) = @_;
4337         return "<tr class=\"metadata_url\"><td>$name</td><td>$url</td></tr>\n";
4338 }
4339
4340 # Group output by placing it in a DIV element and adding a header.
4341 # Options for start_div() can be provided by passing a hash reference as the
4342 # first parameter to the function.
4343 # Options to git_print_header_div() can be provided by passing an array
4344 # reference. This must follow the options to start_div if they are present.
4345 # The content can be a scalar, which is output as-is, a scalar reference, which
4346 # is output after html escaping, an IO handle passed either as *handle or
4347 # *handle{IO}, or a function reference. In the latter case all following
4348 # parameters will be taken as argument to the content function call.
4349 sub git_print_section {
4350         my ($div_args, $header_args, $content);
4351         my $arg = shift;
4352         if (ref($arg) eq 'HASH') {
4353                 $div_args = $arg;
4354                 $arg = shift;
4355         }
4356         if (ref($arg) eq 'ARRAY') {
4357                 $header_args = $arg;
4358                 $arg = shift;
4359         }
4360         $content = $arg;
4361
4362         print $cgi->start_div($div_args);
4363         git_print_header_div(@$header_args);
4364
4365         if (ref($content) eq 'CODE') {
4366                 $content->(@_);
4367         } elsif (ref($content) eq 'SCALAR') {
4368                 print esc_html($$content);
4369         } elsif (ref($content) eq 'GLOB' or ref($content) eq 'IO::Handle') {
4370                 print <$content>;
4371         } elsif (!ref($content) && defined($content)) {
4372                 print $content;
4373         }
4374
4375         print $cgi->end_div;
4376 }
4377
4378 sub format_timestamp_html {
4379         my $date = shift;
4380         my $strtime = $date->{'rfc2822'};
4381
4382         my (undef, undef, $datetime_class) =
4383                 gitweb_get_feature('javascript-timezone');
4384         if ($datetime_class) {
4385                 $strtime = qq!<span class="$datetime_class">$strtime</span>!;
4386         }
4387
4388         my $localtime_format = '(%02d:%02d %s)';
4389         if ($date->{'hour_local'} < 6) {
4390                 $localtime_format = '(<span class="atnight">%02d:%02d</span> %s)';
4391         }
4392         $strtime .= ' ' .
4393                     sprintf($localtime_format,
4394                             $date->{'hour_local'}, $date->{'minute_local'}, $date->{'tz_local'});
4395
4396         return $strtime;
4397 }
4398
4399 # Outputs the author name and date in long form
4400 sub git_print_authorship {
4401         my $co = shift;
4402         my %opts = @_;
4403         my $tag = $opts{-tag} || 'div';
4404         my $author = $co->{'author_name'};
4405
4406         my %ad = parse_date($co->{'author_epoch'}, $co->{'author_tz'});
4407         print "<$tag class=\"author_date\">" .
4408               format_search_author($author, "author", esc_html($author)) .
4409               " [".format_timestamp_html(\%ad)."]".
4410               git_get_avatar($co->{'author_email'}, -pad_before => 1) .
4411               "</$tag>\n";
4412 }
4413
4414 # Outputs table rows containing the full author or committer information,
4415 # in the format expected for 'commit' view (& similar).
4416 # Parameters are a commit hash reference, followed by the list of people
4417 # to output information for. If the list is empty it defaults to both
4418 # author and committer.
4419 sub git_print_authorship_rows {
4420         my $co = shift;
4421         # too bad we can't use @people = @_ || ('author', 'committer')
4422         my @people = @_;
4423         @people = ('author', 'committer') unless @people;
4424         foreach my $who (@people) {
4425                 my %wd = parse_date($co->{"${who}_epoch"}, $co->{"${who}_tz"});
4426                 print "<tr><td>$who</td><td>" .
4427                       format_search_author($co->{"${who}_name"}, $who,
4428                                            esc_html($co->{"${who}_name"})) . " " .
4429                       format_search_author($co->{"${who}_email"}, $who,
4430                                            esc_html("<" . $co->{"${who}_email"} . ">")) .
4431                       "</td><td rowspan=\"2\">" .
4432                       git_get_avatar($co->{"${who}_email"}, -size => 'double') .
4433                       "</td></tr>\n" .
4434                       "<tr>" .
4435                       "<td></td><td>" .
4436                       format_timestamp_html(\%wd) .
4437                       "</td>" .
4438                       "</tr>\n";
4439         }
4440 }
4441
4442 sub git_print_page_path {
4443         my $name = shift;
4444         my $type = shift;
4445         my $hb = shift;
4446
4447
4448         print "<div class=\"page_path\">";
4449         print $cgi->a({-href => href(action=>"tree", hash_base=>$hb),
4450                       -title => 'tree root'}, to_utf8("[$project]"));
4451         print " / ";
4452         if (defined $name) {
4453                 my @dirname = split '/', $name;
4454                 my $basename = pop @dirname;
4455                 my $fullname = '';
4456
4457                 foreach my $dir (@dirname) {
4458                         $fullname .= ($fullname ? '/' : '') . $dir;
4459                         print $cgi->a({-href => href(action=>"tree", file_name=>$fullname,
4460                                                      hash_base=>$hb),
4461                                       -title => $fullname}, esc_path($dir));
4462                         print " / ";
4463                 }
4464                 if (defined $type && $type eq 'blob') {
4465                         print $cgi->a({-href => href(action=>"blob_plain", file_name=>$file_name,
4466                                                      hash_base=>$hb),
4467                                       -title => $name}, esc_path($basename));
4468                 } elsif (defined $type && $type eq 'tree') {
4469                         print $cgi->a({-href => href(action=>"tree", file_name=>$file_name,
4470                                                      hash_base=>$hb),
4471                                       -title => $name}, esc_path($basename));
4472                         print " / ";
4473                 } else {
4474                         print esc_path($basename);
4475                 }
4476         }
4477         print "<br/></div>\n";
4478 }
4479
4480 sub git_print_log {
4481         my $log = shift;
4482         my %opts = @_;
4483
4484         if ($opts{'-remove_title'}) {
4485                 # remove title, i.e. first line of log
4486                 shift @$log;
4487         }
4488         # remove leading empty lines
4489         while (defined $log->[0] && $log->[0] eq "") {
4490                 shift @$log;
4491         }
4492
4493         # print log
4494         my $skip_blank_line = 0;
4495         foreach my $line (@$log) {
4496                 if ($line =~ m/^\s*([A-Z][-A-Za-z]*-[Bb]y|C[Cc]): /) {
4497                         if (! $opts{'-remove_signoff'}) {
4498                                 print "<span class=\"signoff\">" . esc_html($line) . "</span><br/>\n";
4499                                 $skip_blank_line = 1;
4500                         }
4501                         next;
4502                 }
4503
4504                 if ($line =~ m,\s*([a-z]*link): (https?://\S+),i) {
4505                         if (! $opts{'-remove_signoff'}) {
4506                                 print "<span class=\"signoff\">" . esc_html($1) . ": " .
4507                                         "<a href=\"" . esc_html($2) . "\">" . esc_html($2) . "</a>" .
4508                                         "</span><br/>\n";
4509                                 $skip_blank_line = 1;
4510                         }
4511                         next;
4512                 }
4513
4514                 # print only one empty line
4515                 # do not print empty line after signoff
4516                 if ($line eq "") {
4517                         next if ($skip_blank_line);
4518                         $skip_blank_line = 1;
4519                 } else {
4520                         $skip_blank_line = 0;
4521                 }
4522
4523                 print format_log_line_html($line) . "<br/>\n";
4524         }
4525
4526         if ($opts{'-final_empty_line'}) {
4527                 # end with single empty line
4528                 print "<br/>\n" unless $skip_blank_line;
4529         }
4530 }
4531
4532 # return link target (what link points to)
4533 sub git_get_link_target {
4534         my $hash = shift;
4535         my $link_target;
4536
4537         # read link
4538         open my $fd, "-|", git_cmd(), "cat-file", "blob", $hash
4539                 or return;
4540         {
4541                 local $/ = undef;
4542                 $link_target = <$fd>;
4543         }
4544         close $fd
4545                 or return;
4546
4547         return $link_target;
4548 }
4549
4550 # given link target, and the directory (basedir) the link is in,
4551 # return target of link relative to top directory (top tree);
4552 # return undef if it is not possible (including absolute links).
4553 sub normalize_link_target {
4554         my ($link_target, $basedir) = @_;
4555
4556         # absolute symlinks (beginning with '/') cannot be normalized
4557         return if (substr($link_target, 0, 1) eq '/');
4558
4559         # normalize link target to path from top (root) tree (dir)
4560         my $path;
4561         if ($basedir) {
4562                 $path = $basedir . '/' . $link_target;
4563         } else {
4564                 # we are in top (root) tree (dir)
4565                 $path = $link_target;
4566         }
4567
4568         # remove //, /./, and /../
4569         my @path_parts;
4570         foreach my $part (split('/', $path)) {
4571                 # discard '.' and ''
4572                 next if (!$part || $part eq '.');
4573                 # handle '..'
4574                 if ($part eq '..') {
4575                         if (@path_parts) {
4576                                 pop @path_parts;
4577                         } else {
4578                                 # link leads outside repository (outside top dir)
4579                                 return;
4580                         }
4581                 } else {
4582                         push @path_parts, $part;
4583                 }
4584         }
4585         $path = join('/', @path_parts);
4586
4587         return $path;
4588 }
4589
4590 # print tree entry (row of git_tree), but without encompassing <tr> element
4591 sub git_print_tree_entry {
4592         my ($t, $basedir, $hash_base, $have_blame) = @_;
4593
4594         my %base_key = ();
4595         $base_key{'hash_base'} = $hash_base if defined $hash_base;
4596
4597         # The format of a table row is: mode list link.  Where mode is
4598         # the mode of the entry, list is the name of the entry, an href,
4599         # and link is the action links of the entry.
4600
4601         print "<td class=\"mode\">" . mode_str($t->{'mode'}) . "</td>\n";
4602         if (exists $t->{'size'}) {
4603                 print "<td class=\"size\">$t->{'size'}</td>\n";
4604         }
4605         if ($t->{'type'} eq "blob") {
4606                 print "<td class=\"list\">" .
4607                         $cgi->a({-href => href(action=>"blob", hash=>$t->{'hash'},
4608                                                file_name=>"$basedir$t->{'name'}", %base_key),
4609                                 -class => "list"}, esc_path($t->{'name'}));
4610                 if (S_ISLNK(oct $t->{'mode'})) {
4611                         my $link_target = git_get_link_target($t->{'hash'});
4612                         if ($link_target) {
4613                                 my $norm_target = normalize_link_target($link_target, $basedir);
4614                                 if (defined $norm_target) {
4615                                         print " -> " .
4616                                               $cgi->a({-href => href(action=>"object", hash_base=>$hash_base,
4617                                                                      file_name=>$norm_target),
4618                                                        -title => $norm_target}, esc_path($link_target));
4619                                 } else {
4620                                         print " -> " . esc_path($link_target);
4621                                 }
4622                         }
4623                 }
4624                 print "</td>\n";
4625                 print "<td class=\"link\">";
4626                 print $cgi->a({-href => href(action=>"blob", hash=>$t->{'hash'},
4627                                              file_name=>"$basedir$t->{'name'}", %base_key)},
4628                               "blob");
4629                 if ($have_blame) {
4630                         print " | " .
4631                               $cgi->a({-href => href(action=>"blame", hash=>$t->{'hash'},
4632                                                      file_name=>"$basedir$t->{'name'}", %base_key)},
4633                                       "blame");
4634                 }
4635                 if (defined $hash_base) {
4636                         print " | " .
4637                               $cgi->a({-href => href(action=>"history", hash_base=>$hash_base,
4638                                                      hash=>$t->{'hash'}, file_name=>"$basedir$t->{'name'}")},
4639                                       "history");
4640                 }
4641                 print " | " .
4642                         $cgi->a({-href => href(action=>"blob_plain", hash_base=>$hash_base,
4643                                                file_name=>"$basedir$t->{'name'}")},
4644                                 "raw");
4645                 print "</td>\n";
4646
4647         } elsif ($t->{'type'} eq "tree") {
4648                 print "<td class=\"list\">";
4649                 print $cgi->a({-href => href(action=>"tree", hash=>$t->{'hash'},
4650                                              file_name=>"$basedir$t->{'name'}",
4651                                              %base_key)},
4652                               esc_path($t->{'name'}));
4653                 print "</td>\n";
4654                 print "<td class=\"link\">";
4655                 print $cgi->a({-href => href(action=>"tree", hash=>$t->{'hash'},
4656                                              file_name=>"$basedir$t->{'name'}",
4657                                              %base_key)},
4658                               "tree");
4659                 if (defined $hash_base) {
4660                         print " | " .
4661                               $cgi->a({-href => href(action=>"history", hash_base=>$hash_base,
4662                                                      file_name=>"$basedir$t->{'name'}")},
4663                                       "history");
4664                 }
4665                 print "</td>\n";
4666         } else {
4667                 # unknown object: we can only present history for it
4668                 # (this includes 'commit' object, i.e. submodule support)
4669                 print "<td class=\"list\">" .
4670                       esc_path($t->{'name'}) .
4671                       "</td>\n";
4672                 print "<td class=\"link\">";
4673                 if (defined $hash_base) {
4674                         print $cgi->a({-href => href(action=>"history",
4675                                                      hash_base=>$hash_base,
4676                                                      file_name=>"$basedir$t->{'name'}")},
4677                                       "history");
4678                 }
4679                 print "</td>\n";
4680         }
4681 }
4682
4683 ## ......................................................................
4684 ## functions printing large fragments of HTML
4685
4686 # get pre-image filenames for merge (combined) diff
4687 sub fill_from_file_info {
4688         my ($diff, @parents) = @_;
4689
4690         $diff->{'from_file'} = [ ];
4691         $diff->{'from_file'}[$diff->{'nparents'} - 1] = undef;
4692         for (my $i = 0; $i < $diff->{'nparents'}; $i++) {
4693                 if ($diff->{'status'}[$i] eq 'R' ||
4694                     $diff->{'status'}[$i] eq 'C') {
4695                         $diff->{'from_file'}[$i] =
4696                                 git_get_path_by_hash($parents[$i], $diff->{'from_id'}[$i]);
4697                 }
4698         }
4699
4700         return $diff;
4701 }
4702
4703 # is current raw difftree line of file deletion
4704 sub is_deleted {
4705         my $diffinfo = shift;
4706
4707         return $diffinfo->{'to_id'} eq ('0' x 40);
4708 }
4709
4710 # does patch correspond to [previous] difftree raw line
4711 # $diffinfo  - hashref of parsed raw diff format
4712 # $patchinfo - hashref of parsed patch diff format
4713 #              (the same keys as in $diffinfo)
4714 sub is_patch_split {
4715         my ($diffinfo, $patchinfo) = @_;
4716
4717         return defined $diffinfo && defined $patchinfo
4718                 && $diffinfo->{'to_file'} eq $patchinfo->{'to_file'};
4719 }
4720
4721
4722 sub git_difftree_body {
4723         my ($difftree, $hash, @parents) = @_;
4724         my ($parent) = $parents[0];
4725         my $have_blame = gitweb_check_feature('blame');
4726         print "<div class=\"list_head\">\n";
4727         if ($#{$difftree} > 10) {
4728                 print(($#{$difftree} + 1) . " files changed:\n");
4729         }
4730         print "</div>\n";
4731
4732         print "<table class=\"" .
4733               (@parents > 1 ? "combined " : "") .
4734               "diff_tree\">\n";
4735
4736         # header only for combined diff in 'commitdiff' view
4737         my $has_header = @$difftree && @parents > 1 && $action eq 'commitdiff';
4738         if ($has_header) {
4739                 # table header
4740                 print "<thead><tr>\n" .
4741                        "<th></th><th></th>\n"; # filename, patchN link
4742                 for (my $i = 0; $i < @parents; $i++) {
4743                         my $par = $parents[$i];
4744                         print "<th>" .
4745                               $cgi->a({-href => href(action=>"commitdiff",
4746                                                      hash=>$hash, hash_parent=>$par),
4747                                        -title => 'commitdiff to parent number ' .
4748                                                   ($i+1) . ': ' . substr($par,0,7)},
4749                                       $i+1) .
4750                               "&nbsp;</th>\n";
4751                 }
4752                 print "</tr></thead>\n<tbody>\n";
4753         }
4754
4755         my $alternate = 1;
4756         my $patchno = 0;
4757         foreach my $line (@{$difftree}) {
4758                 my $diff = parsed_difftree_line($line);
4759
4760                 if ($alternate) {
4761                         print "<tr class=\"dark\">\n";
4762                 } else {
4763                         print "<tr class=\"light\">\n";
4764                 }
4765                 $alternate ^= 1;
4766
4767                 if (exists $diff->{'nparents'}) { # combined diff
4768
4769                         fill_from_file_info($diff, @parents)
4770                                 unless exists $diff->{'from_file'};
4771
4772                         if (!is_deleted($diff)) {
4773                                 # file exists in the result (child) commit
4774                                 print "<td>" .
4775                                       $cgi->a({-href => href(action=>"blob", hash=>$diff->{'to_id'},
4776                                                              file_name=>$diff->{'to_file'},
4777                                                              hash_base=>$hash),
4778                                               -class => "list"}, esc_path($diff->{'to_file'})) .
4779                                       "</td>\n";
4780                         } else {
4781                                 print "<td>" .
4782                                       esc_path($diff->{'to_file'}) .
4783                                       "</td>\n";
4784                         }
4785
4786                         if ($action eq 'commitdiff') {
4787                                 # link to patch
4788                                 $patchno++;
4789                                 print "<td class=\"link\">" .
4790                                       $cgi->a({-href => href(-anchor=>"patch$patchno")},
4791                                               "patch") .
4792                                       " | " .
4793                                       "</td>\n";
4794                         }
4795
4796                         my $has_history = 0;
4797                         my $not_deleted = 0;
4798                         for (my $i = 0; $i < $diff->{'nparents'}; $i++) {
4799                                 my $hash_parent = $parents[$i];
4800                                 my $from_hash = $diff->{'from_id'}[$i];
4801                                 my $from_path = $diff->{'from_file'}[$i];
4802                                 my $status = $diff->{'status'}[$i];
4803
4804                                 $has_history ||= ($status ne 'A');
4805                                 $not_deleted ||= ($status ne 'D');
4806
4807                                 if ($status eq 'A') {
4808                                         print "<td  class=\"link\" align=\"right\"> | </td>\n";
4809                                 } elsif ($status eq 'D') {
4810                                         print "<td class=\"link\">" .
4811                                               $cgi->a({-href => href(action=>"blob",
4812                                                                      hash_base=>$hash,
4813                                                                      hash=>$from_hash,
4814                                                                      file_name=>$from_path)},
4815                                                       "blob" . ($i+1)) .
4816                                               " | </td>\n";
4817                                 } else {
4818                                         if ($diff->{'to_id'} eq $from_hash) {
4819                                                 print "<td class=\"link nochange\">";
4820                                         } else {
4821                                                 print "<td class=\"link\">";
4822                                         }
4823                                         print $cgi->a({-href => href(action=>"blobdiff",
4824                                                                      hash=>$diff->{'to_id'},
4825                                                                      hash_parent=>$from_hash,
4826                                                                      hash_base=>$hash,
4827                                                                      hash_parent_base=>$hash_parent,
4828                                                                      file_name=>$diff->{'to_file'},
4829                                                                      file_parent=>$from_path)},
4830                                                       "diff" . ($i+1)) .
4831                                               " | </td>\n";
4832                                 }
4833                         }
4834
4835                         print "<td class=\"link\">";
4836                         if ($not_deleted) {
4837                                 print $cgi->a({-href => href(action=>"blob",
4838                                                              hash=>$diff->{'to_id'},
4839                                                              file_name=>$diff->{'to_file'},
4840                                                              hash_base=>$hash)},
4841                                               "blob");
4842                                 print " | " if ($has_history);
4843                         }
4844                         if ($has_history) {
4845                                 print $cgi->a({-href => href(action=>"history",
4846                                                              file_name=>$diff->{'to_file'},
4847                                                              hash_base=>$hash)},
4848                                               "history");
4849                         }
4850                         print "</td>\n";
4851
4852                         print "</tr>\n";
4853                         next; # instead of 'else' clause, to avoid extra indent
4854                 }
4855                 # else ordinary diff
4856
4857                 my ($to_mode_oct, $to_mode_str, $to_file_type);
4858                 my ($from_mode_oct, $from_mode_str, $from_file_type);
4859                 if ($diff->{'to_mode'} ne ('0' x 6)) {
4860                         $to_mode_oct = oct $diff->{'to_mode'};
4861                         if (S_ISREG($to_mode_oct)) { # only for regular file
4862                                 $to_mode_str = sprintf("%04o", $to_mode_oct & 0777); # permission bits
4863                         }
4864                         $to_file_type = file_type($diff->{'to_mode'});
4865                 }
4866                 if ($diff->{'from_mode'} ne ('0' x 6)) {
4867                         $from_mode_oct = oct $diff->{'from_mode'};
4868                         if (S_ISREG($from_mode_oct)) { # only for regular file
4869                                 $from_mode_str = sprintf("%04o", $from_mode_oct & 0777); # permission bits
4870                         }
4871                         $from_file_type = file_type($diff->{'from_mode'});
4872                 }
4873
4874                 if ($diff->{'status'} eq "A") { # created
4875                         my $mode_chng = "<span class=\"file_status new\">[new $to_file_type";
4876                         $mode_chng   .= " with mode: $to_mode_str" if $to_mode_str;
4877                         $mode_chng   .= "]</span>";
4878                         print "<td>";
4879                         print $cgi->a({-href => href(action=>"blob", hash=>$diff->{'to_id'},
4880                                                      hash_base=>$hash, file_name=>$diff->{'file'}),
4881                                       -class => "list"}, esc_path($diff->{'file'}));
4882                         print "</td>\n";
4883                         print "<td>$mode_chng</td>\n";
4884                         print "<td class=\"link\">";
4885                         if ($action eq 'commitdiff') {
4886                                 # link to patch
4887                                 $patchno++;
4888                                 print $cgi->a({-href => href(-anchor=>"patch$patchno")},
4889                                               "patch") .
4890                                       " | ";
4891                         }
4892                         print $cgi->a({-href => href(action=>"blob", hash=>$diff->{'to_id'},
4893                                                      hash_base=>$hash, file_name=>$diff->{'file'})},
4894                                       "blob");
4895                         print "</td>\n";
4896
4897                 } elsif ($diff->{'status'} eq "D") { # deleted
4898                         my $mode_chng = "<span class=\"file_status deleted\">[deleted $from_file_type]</span>";
4899                         print "<td>";
4900                         print $cgi->a({-href => href(action=>"blob", hash=>$diff->{'from_id'},
4901                                                      hash_base=>$parent, file_name=>$diff->{'file'}),
4902                                        -class => "list"}, esc_path($diff->{'file'}));
4903                         print "</td>\n";
4904                         print "<td>$mode_chng</td>\n";
4905                         print "<td class=\"link\">";
4906                         if ($action eq 'commitdiff') {
4907                                 # link to patch
4908                                 $patchno++;
4909                                 print $cgi->a({-href => href(-anchor=>"patch$patchno")},
4910                                               "patch") .
4911                                       " | ";
4912                         }
4913                         print $cgi->a({-href => href(action=>"blob", hash=>$diff->{'from_id'},
4914                                                      hash_base=>$parent, file_name=>$diff->{'file'})},
4915                                       "blob") . " | ";
4916                         if ($have_blame) {
4917                                 print $cgi->a({-href => href(action=>"blame", hash_base=>$parent,
4918                                                              file_name=>$diff->{'file'})},
4919                                               "blame") . " | ";
4920                         }
4921                         print $cgi->a({-href => href(action=>"history", hash_base=>$parent,
4922                                                      file_name=>$diff->{'file'})},
4923                                       "history");
4924                         print "</td>\n";
4925
4926                 } elsif ($diff->{'status'} eq "M" || $diff->{'status'} eq "T") { # modified, or type changed
4927                         my $mode_chnge = "";
4928                         if ($diff->{'from_mode'} != $diff->{'to_mode'}) {
4929                                 $mode_chnge = "<span class=\"file_status mode_chnge\">[changed";
4930                                 if ($from_file_type ne $to_file_type) {
4931                                         $mode_chnge .= " from $from_file_type to $to_file_type";
4932                                 }
4933                                 if (($from_mode_oct & 0777) != ($to_mode_oct & 0777)) {
4934                                         if ($from_mode_str && $to_mode_str) {
4935                                                 $mode_chnge .= " mode: $from_mode_str->$to_mode_str";
4936                                         } elsif ($to_mode_str) {
4937                                                 $mode_chnge .= " mode: $to_mode_str";
4938                                         }
4939                                 }
4940                                 $mode_chnge .= "]</span>\n";
4941                         }
4942                         print "<td>";
4943                         print $cgi->a({-href => href(action=>"blob", hash=>$diff->{'to_id'},
4944                                                      hash_base=>$hash, file_name=>$diff->{'file'}),
4945                                       -class => "list"}, esc_path($diff->{'file'}));
4946                         print "</td>\n";
4947                         print "<td>$mode_chnge</td>\n";
4948                         print "<td class=\"link\">";
4949                         if ($action eq 'commitdiff') {
4950                                 # link to patch
4951                                 $patchno++;
4952                                 print $cgi->a({-href => href(-anchor=>"patch$patchno")},
4953                                               "patch") .
4954                                       " | ";
4955                         } elsif ($diff->{'to_id'} ne $diff->{'from_id'}) {
4956                                 # "commit" view and modified file (not onlu mode changed)
4957                                 print $cgi->a({-href => href(action=>"blobdiff",
4958                                                              hash=>$diff->{'to_id'}, hash_parent=>$diff->{'from_id'},
4959                                                              hash_base=>$hash, hash_parent_base=>$parent,
4960                                                              file_name=>$diff->{'file'})},
4961                                               "diff") .
4962                                       " | ";
4963                         }
4964                         print $cgi->a({-href => href(action=>"blob", hash=>$diff->{'to_id'},
4965                                                      hash_base=>$hash, file_name=>$diff->{'file'})},
4966                                        "blob") . " | ";
4967                         if ($have_blame) {
4968                                 print $cgi->a({-href => href(action=>"blame", hash_base=>$hash,
4969                                                              file_name=>$diff->{'file'})},
4970                                               "blame") . " | ";
4971                         }
4972                         print $cgi->a({-href => href(action=>"history", hash_base=>$hash,
4973                                                      file_name=>$diff->{'file'})},
4974                                       "history");
4975                         print "</td>\n";
4976
4977                 } elsif ($diff->{'status'} eq "R" || $diff->{'status'} eq "C") { # renamed or copied
4978                         my %status_name = ('R' => 'moved', 'C' => 'copied');
4979                         my $nstatus = $status_name{$diff->{'status'}};
4980                         my $mode_chng = "";
4981                         if ($diff->{'from_mode'} != $diff->{'to_mode'}) {
4982                                 # mode also for directories, so we cannot use $to_mode_str
4983                                 $mode_chng = sprintf(", mode: %04o", $to_mode_oct & 0777);
4984                         }
4985                         print "<td>" .
4986                               $cgi->a({-href => href(action=>"blob", hash_base=>$hash,
4987                                                      hash=>$diff->{'to_id'}, file_name=>$diff->{'to_file'}),
4988                                       -class => "list"}, esc_path($diff->{'to_file'})) . "</td>\n" .
4989                               "<td><span class=\"file_status $nstatus\">[$nstatus from " .
4990                               $cgi->a({-href => href(action=>"blob", hash_base=>$parent,
4991                                                      hash=>$diff->{'from_id'}, file_name=>$diff->{'from_file'}),
4992                                       -class => "list"}, esc_path($diff->{'from_file'})) .
4993                               " with " . (int $diff->{'similarity'}) . "% similarity$mode_chng]</span></td>\n" .
4994                               "<td class=\"link\">";
4995                         if ($action eq 'commitdiff') {
4996                                 # link to patch
4997                                 $patchno++;
4998                                 print $cgi->a({-href => href(-anchor=>"patch$patchno")},
4999                                               "patch") .
5000                                       " | ";
5001                         } elsif ($diff->{'to_id'} ne $diff->{'from_id'}) {
5002                                 # "commit" view and modified file (not only pure rename or copy)
5003                                 print $cgi->a({-href => href(action=>"blobdiff",
5004                                                              hash=>$diff->{'to_id'}, hash_parent=>$diff->{'from_id'},
5005                                                              hash_base=>$hash, hash_parent_base=>$parent,
5006                                                              file_name=>$diff->{'to_file'}, file_parent=>$diff->{'from_file'})},
5007                                               "diff") .
5008                                       " | ";
5009                         }
5010                         print $cgi->a({-href => href(action=>"blob", hash=>$diff->{'to_id'},
5011                                                      hash_base=>$parent, file_name=>$diff->{'to_file'})},
5012                                       "blob") . " | ";
5013                         if ($have_blame) {
5014                                 print $cgi->a({-href => href(action=>"blame", hash_base=>$hash,
5015                                                              file_name=>$diff->{'to_file'})},
5016                                               "blame") . " | ";
5017                         }
5018                         print $cgi->a({-href => href(action=>"history", hash_base=>$hash,
5019                                                     file_name=>$diff->{'to_file'})},
5020                                       "history");
5021                         print "</td>\n";
5022
5023                 } # we should not encounter Unmerged (U) or Unknown (X) status
5024                 print "</tr>\n";
5025         }
5026         print "</tbody>" if $has_header;
5027         print "</table>\n";
5028 }
5029
5030 # Print context lines and then rem/add lines in a side-by-side manner.
5031 sub print_sidebyside_diff_lines {
5032         my ($ctx, $rem, $add) = @_;
5033
5034         # print context block before add/rem block
5035         if (@$ctx) {
5036                 print join '',
5037                         '<div class="chunk_block ctx">',
5038                                 '<div class="old">',
5039                                 @$ctx,
5040                                 '</div>',
5041                                 '<div class="new">',
5042                                 @$ctx,
5043                                 '</div>',
5044                         '</div>';
5045         }
5046
5047         if (!@$add) {
5048                 # pure removal
5049                 print join '',
5050                         '<div class="chunk_block rem">',
5051                                 '<div class="old">',
5052                                 @$rem,
5053                                 '</div>',
5054                         '</div>';
5055         } elsif (!@$rem) {
5056                 # pure addition
5057                 print join '',
5058                         '<div class="chunk_block add">',
5059                                 '<div class="new">',
5060                                 @$add,
5061                                 '</div>',
5062                         '</div>';
5063         } else {
5064                 print join '',
5065                         '<div class="chunk_block chg">',
5066                                 '<div class="old">',
5067                                 @$rem,
5068                                 '</div>',
5069                                 '<div class="new">',
5070                                 @$add,
5071                                 '</div>',
5072                         '</div>';
5073         }
5074 }
5075
5076 # Print context lines and then rem/add lines in inline manner.
5077 sub print_inline_diff_lines {
5078         my ($ctx, $rem, $add) = @_;
5079
5080         print @$ctx, @$rem, @$add;
5081 }
5082
5083 # Format removed and added line, mark changed part and HTML-format them.
5084 # Implementation is based on contrib/diff-highlight
5085 sub format_rem_add_lines_pair {
5086         my ($rem, $add, $num_parents) = @_;
5087
5088         # We need to untabify lines before split()'ing them;
5089         # otherwise offsets would be invalid.
5090         chomp $rem;
5091         chomp $add;
5092         $rem = untabify($rem);
5093         $add = untabify($add);
5094
5095         my @rem = split(//, $rem);
5096         my @add = split(//, $add);
5097         my ($esc_rem, $esc_add);
5098         # Ignore leading +/- characters for each parent.
5099         my ($prefix_len, $suffix_len) = ($num_parents, 0);
5100         my ($prefix_has_nonspace, $suffix_has_nonspace);
5101
5102         my $shorter = (@rem < @add) ? @rem : @add;
5103         while ($prefix_len < $shorter) {
5104                 last if ($rem[$prefix_len] ne $add[$prefix_len]);
5105
5106                 $prefix_has_nonspace = 1 if ($rem[$prefix_len] !~ /\s/);
5107                 $prefix_len++;
5108         }
5109
5110         while ($prefix_len + $suffix_len < $shorter) {
5111                 last if ($rem[-1 - $suffix_len] ne $add[-1 - $suffix_len]);
5112
5113                 $suffix_has_nonspace = 1 if ($rem[-1 - $suffix_len] !~ /\s/);
5114                 $suffix_len++;
5115         }
5116
5117         # Mark lines that are different from each other, but have some common
5118         # part that isn't whitespace.  If lines are completely different, don't
5119         # mark them because that would make output unreadable, especially if
5120         # diff consists of multiple lines.
5121         if ($prefix_has_nonspace || $suffix_has_nonspace) {
5122                 $esc_rem = esc_html_hl_regions($rem, 'marked',
5123                         [$prefix_len, @rem - $suffix_len], -nbsp=>1);
5124                 $esc_add = esc_html_hl_regions($add, 'marked',
5125                         [$prefix_len, @add - $suffix_len], -nbsp=>1);
5126         } else {
5127                 $esc_rem = esc_html($rem, -nbsp=>1);
5128                 $esc_add = esc_html($add, -nbsp=>1);
5129         }
5130
5131         return format_diff_line(\$esc_rem, 'rem'),
5132                format_diff_line(\$esc_add, 'add');
5133 }
5134
5135 # HTML-format diff context, removed and added lines.
5136 sub format_ctx_rem_add_lines {
5137         my ($ctx, $rem, $add, $num_parents) = @_;
5138         my (@new_ctx, @new_rem, @new_add);
5139         my $can_highlight = 0;
5140         my $is_combined = ($num_parents > 1);
5141
5142         # Highlight if every removed line has a corresponding added line.
5143         if (@$add > 0 && @$add == @$rem) {
5144                 $can_highlight = 1;
5145
5146                 # Highlight lines in combined diff only if the chunk contains
5147                 # diff between the same version, e.g.
5148                 #
5149                 #    - a
5150                 #   -  b
5151                 #    + c
5152                 #   +  d
5153                 #
5154                 # Otherwise the highlightling would be confusing.
5155                 if ($is_combined) {
5156                         for (my $i = 0; $i < @$add; $i++) {
5157                                 my $prefix_rem = substr($rem->[$i], 0, $num_parents);
5158                                 my $prefix_add = substr($add->[$i], 0, $num_parents);
5159
5160                                 $prefix_rem =~ s/-/+/g;
5161
5162                                 if ($prefix_rem ne $prefix_add) {
5163                                         $can_highlight = 0;
5164                                         last;
5165                                 }
5166                         }
5167                 }
5168         }
5169
5170         if ($can_highlight) {
5171                 for (my $i = 0; $i < @$add; $i++) {
5172                         my ($line_rem, $line_add) = format_rem_add_lines_pair(
5173                                 $rem->[$i], $add->[$i], $num_parents);
5174                         push @new_rem, $line_rem;
5175                         push @new_add, $line_add;
5176                 }
5177         } else {
5178                 @new_rem = map { format_diff_line($_, 'rem') } @$rem;
5179                 @new_add = map { format_diff_line($_, 'add') } @$add;
5180         }
5181
5182         @new_ctx = map { format_diff_line($_, 'ctx') } @$ctx;
5183
5184         return (\@new_ctx, \@new_rem, \@new_add);
5185 }
5186
5187 # Print context lines and then rem/add lines.
5188 sub print_diff_lines {
5189         my ($ctx, $rem, $add, $diff_style, $num_parents) = @_;
5190         my $is_combined = $num_parents > 1;
5191
5192         ($ctx, $rem, $add) = format_ctx_rem_add_lines($ctx, $rem, $add,
5193                 $num_parents);
5194
5195         if ($diff_style eq 'sidebyside' && !$is_combined) {
5196                 print_sidebyside_diff_lines($ctx, $rem, $add);
5197         } else {
5198                 # default 'inline' style and unknown styles
5199                 print_inline_diff_lines($ctx, $rem, $add);
5200         }
5201 }
5202
5203 sub print_diff_chunk {
5204         my ($diff_style, $num_parents, $from, $to, @chunk) = @_;
5205         my (@ctx, @rem, @add);
5206
5207         # The class of the previous line.
5208         my $prev_class = '';
5209
5210         return unless @chunk;
5211
5212         # incomplete last line might be among removed or added lines,
5213         # or both, or among context lines: find which
5214         for (my $i = 1; $i < @chunk; $i++) {
5215                 if ($chunk[$i][0] eq 'incomplete') {
5216                         $chunk[$i][0] = $chunk[$i-1][0];
5217                 }
5218         }
5219
5220         # guardian
5221         push @chunk, ["", ""];
5222
5223         foreach my $line_info (@chunk) {
5224                 my ($class, $line) = @$line_info;
5225
5226                 # print chunk headers
5227                 if ($class && $class eq 'chunk_header') {
5228                         print format_diff_line($line, $class, $from, $to);
5229                         next;
5230                 }
5231
5232                 ## print from accumulator when have some add/rem lines or end
5233                 # of chunk (flush context lines), or when have add and rem
5234                 # lines and new block is reached (otherwise add/rem lines could
5235                 # be reordered)
5236                 if (!$class || ((@rem || @add) && $class eq 'ctx') ||
5237                     (@rem && @add && $class ne $prev_class)) {
5238                         print_diff_lines(\@ctx, \@rem, \@add,
5239                                          $diff_style, $num_parents);
5240                         @ctx = @rem = @add = ();
5241                 }
5242
5243                 ## adding lines to accumulator
5244                 # guardian value
5245                 last unless $line;
5246                 # rem, add or change
5247                 if ($class eq 'rem') {
5248                         push @rem, $line;
5249                 } elsif ($class eq 'add') {
5250                         push @add, $line;
5251                 }
5252                 # context line
5253                 if ($class eq 'ctx') {
5254                         push @ctx, $line;
5255                 }
5256
5257                 $prev_class = $class;
5258         }
5259 }
5260
5261 sub git_patchset_body {
5262         my ($fd, $diff_style, $difftree, $hash, @hash_parents) = @_;
5263         my ($hash_parent) = $hash_parents[0];
5264
5265         my $is_combined = (@hash_parents > 1);
5266         my $patch_idx = 0;
5267         my $patch_number = 0;
5268         my $patch_line;
5269         my $diffinfo;
5270         my $to_name;
5271         my (%from, %to);
5272         my @chunk; # for side-by-side diff
5273
5274         print "<div class=\"patchset\">\n";
5275
5276         # skip to first patch
5277         while ($patch_line = <$fd>) {
5278                 chomp $patch_line;
5279
5280                 last if ($patch_line =~ m/^diff /);
5281         }
5282
5283  PATCH:
5284         while ($patch_line) {
5285
5286                 # parse "git diff" header line
5287                 if ($patch_line =~ m/^diff --git (\"(?:[^\\\"]*(?:\\.[^\\\"]*)*)\"|[^ "]*) (.*)$/) {
5288                         # $1 is from_name, which we do not use
5289                         $to_name = unquote($2);
5290                         $to_name =~ s!^b/!!;
5291                 } elsif ($patch_line =~ m/^diff --(cc|combined) ("?.*"?)$/) {
5292                         # $1 is 'cc' or 'combined', which we do not use
5293                         $to_name = unquote($2);
5294                 } else {
5295                         $to_name = undef;
5296                 }
5297
5298                 # check if current patch belong to current raw line
5299                 # and parse raw git-diff line if needed
5300                 if (is_patch_split($diffinfo, { 'to_file' => $to_name })) {
5301                         # this is continuation of a split patch
5302                         print "<div class=\"patch cont\">\n";
5303                 } else {
5304                         # advance raw git-diff output if needed
5305                         $patch_idx++ if defined $diffinfo;
5306
5307                         # read and prepare patch information
5308                         $diffinfo = parsed_difftree_line($difftree->[$patch_idx]);
5309
5310                         # compact combined diff output can have some patches skipped
5311                         # find which patch (using pathname of result) we are at now;
5312                         if ($is_combined) {
5313                                 while ($to_name ne $diffinfo->{'to_file'}) {
5314                                         print "<div class=\"patch\" id=\"patch". ($patch_idx+1) ."\">\n" .
5315                                               format_diff_cc_simplified($diffinfo, @hash_parents) .
5316                                               "</div>\n";  # class="patch"
5317
5318                                         $patch_idx++;
5319                                         $patch_number++;
5320
5321                                         last if $patch_idx > $#$difftree;
5322                                         $diffinfo = parsed_difftree_line($difftree->[$patch_idx]);
5323                                 }
5324                         }
5325
5326                         # modifies %from, %to hashes
5327                         parse_from_to_diffinfo($diffinfo, \%from, \%to, @hash_parents);
5328
5329                         # this is first patch for raw difftree line with $patch_idx index
5330                         # we index @$difftree array from 0, but number patches from 1
5331                         print "<div class=\"patch\" id=\"patch". ($patch_idx+1) ."\">\n";
5332                 }
5333
5334                 # git diff header
5335                 #assert($patch_line =~ m/^diff /) if DEBUG;
5336                 #assert($patch_line !~ m!$/$!) if DEBUG; # is chomp-ed
5337                 $patch_number++;
5338                 # print "git diff" header
5339                 print format_git_diff_header_line($patch_line, $diffinfo,
5340                                                   \%from, \%to);
5341
5342                 # print extended diff header
5343                 print "<div class=\"diff extended_header\">\n";
5344         EXTENDED_HEADER:
5345                 while ($patch_line = <$fd>) {
5346                         chomp $patch_line;
5347
5348                         last EXTENDED_HEADER if ($patch_line =~ m/^--- |^diff /);
5349
5350                         print format_extended_diff_header_line($patch_line, $diffinfo,
5351                                                                \%from, \%to);
5352                 }
5353                 print "</div>\n"; # class="diff extended_header"
5354
5355                 # from-file/to-file diff header
5356                 if (! $patch_line) {
5357                         print "</div>\n"; # class="patch"
5358                         last PATCH;
5359                 }
5360                 next PATCH if ($patch_line =~ m/^diff /);
5361                 #assert($patch_line =~ m/^---/) if DEBUG;
5362
5363                 my $last_patch_line = $patch_line;
5364                 $patch_line = <$fd>;
5365                 chomp $patch_line;
5366                 #assert($patch_line =~ m/^\+\+\+/) if DEBUG;
5367
5368                 print format_diff_from_to_header($last_patch_line, $patch_line,
5369                                                  $diffinfo, \%from, \%to,
5370                                                  @hash_parents);
5371
5372                 # the patch itself
5373         LINE:
5374                 while ($patch_line = <$fd>) {
5375                         chomp $patch_line;
5376
5377                         next PATCH if ($patch_line =~ m/^diff /);
5378
5379                         my $class = diff_line_class($patch_line, \%from, \%to);
5380
5381                         if ($class eq 'chunk_header') {
5382                                 print_diff_chunk($diff_style, scalar @hash_parents, \%from, \%to, @chunk);
5383                                 @chunk = ();
5384                         }
5385
5386                         push @chunk, [ $class, $patch_line ];
5387                 }
5388
5389         } continue {
5390                 if (@chunk) {
5391                         print_diff_chunk($diff_style, scalar @hash_parents, \%from, \%to, @chunk);
5392                         @chunk = ();
5393                 }
5394                 print "</div>\n"; # class="patch"
5395         }
5396
5397         # for compact combined (--cc) format, with chunk and patch simplification
5398         # the patchset might be empty, but there might be unprocessed raw lines
5399         for (++$patch_idx if $patch_number > 0;
5400              $patch_idx < @$difftree;
5401              ++$patch_idx) {
5402                 # read and prepare patch information
5403                 $diffinfo = parsed_difftree_line($difftree->[$patch_idx]);
5404
5405                 # generate anchor for "patch" links in difftree / whatchanged part
5406                 print "<div class=\"patch\" id=\"patch". ($patch_idx+1) ."\">\n" .
5407                       format_diff_cc_simplified($diffinfo, @hash_parents) .
5408                       "</div>\n";  # class="patch"
5409
5410                 $patch_number++;
5411         }
5412
5413         if ($patch_number == 0) {
5414                 if (@hash_parents > 1) {
5415                         print "<div class=\"diff nodifferences\">Trivial merge</div>\n";
5416                 } else {
5417                         print "<div class=\"diff nodifferences\">No differences found</div>\n";
5418                 }
5419         }
5420
5421         print "</div>\n"; # class="patchset"
5422 }
5423
5424 # . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
5425
5426 sub git_project_search_form {
5427         my ($searchtext, $search_use_regexp) = @_;
5428
5429         my $limit = '';
5430         if ($project_filter) {
5431                 $limit = " in '$project_filter/'";
5432         }
5433
5434         print "<div class=\"projsearch\">\n";
5435         print $cgi->startform(-method => 'get', -action => $my_uri) .
5436               $cgi->hidden(-name => 'a', -value => 'project_list')  . "\n";
5437         print $cgi->hidden(-name => 'pf', -value => $project_filter). "\n"
5438                 if (defined $project_filter);
5439         print $cgi->textfield(-name => 's', -value => $searchtext,
5440                               -title => "Search project by name and description$limit",
5441                               -size => 60) . "\n" .
5442               "<span title=\"Extended regular expression\">" .
5443               $cgi->checkbox(-name => 'sr', -value => 1, -label => 're',
5444                              -checked => $search_use_regexp) .
5445               "</span>\n" .
5446               $cgi->submit(-name => 'btnS', -value => 'Search') .
5447               $cgi->end_form() . "\n" .
5448               $cgi->a({-href => href(project => undef, searchtext => undef,
5449                                      project_filter => $project_filter)},
5450                       esc_html("List all projects$limit")) . "<br />\n";
5451         print "</div>\n";
5452 }
5453
5454 # entry for given @keys needs filling if at least one of keys in list
5455 # is not present in %$project_info
5456 sub project_info_needs_filling {
5457         my ($project_info, @keys) = @_;
5458
5459         # return List::MoreUtils::any { !exists $project_info->{$_} } @keys;
5460         foreach my $key (@keys) {
5461                 if (!exists $project_info->{$key}) {
5462                         return 1;
5463                 }
5464         }
5465         return;
5466 }
5467
5468 # fills project list info (age, description, owner, category, forks, etc.)
5469 # for each project in the list, removing invalid projects from
5470 # returned list, or fill only specified info.
5471 #
5472 # Invalid projects are removed from the returned list if and only if you
5473 # ask 'age' or 'age_string' to be filled, because they are the only fields
5474 # that run unconditionally git command that requires repository, and
5475 # therefore do always check if project repository is invalid.
5476 #
5477 # USAGE:
5478 # * fill_project_list_info(\@project_list, 'descr_long', 'ctags')
5479 #   ensures that 'descr_long' and 'ctags' fields are filled
5480 # * @project_list = fill_project_list_info(\@project_list)
5481 #   ensures that all fields are filled (and invalid projects removed)
5482 #
5483 # NOTE: modifies $projlist, but does not remove entries from it
5484 sub fill_project_list_info {
5485         my ($projlist, @wanted_keys) = @_;
5486         my @projects;
5487         my $filter_set = sub { return @_; };
5488         if (@wanted_keys) {
5489                 my %wanted_keys = map { $_ => 1 } @wanted_keys;
5490                 $filter_set = sub { return grep { $wanted_keys{$_} } @_; };
5491         }
5492
5493         my $show_ctags = gitweb_check_feature('ctags');
5494  PROJECT:
5495         foreach my $pr (@$projlist) {
5496                 if (project_info_needs_filling($pr, $filter_set->('age', 'age_string'))) {
5497                         my (@activity) = git_get_last_activity($pr->{'path'});
5498                         unless (@activity) {
5499                                 next PROJECT;
5500                         }
5501                         ($pr->{'age'}, $pr->{'age_string'}) = @activity;
5502                 }
5503                 if (project_info_needs_filling($pr, $filter_set->('descr', 'descr_long'))) {
5504                         my $descr = git_get_project_description($pr->{'path'}) || "";
5505                         $descr = to_utf8($descr);
5506                         $pr->{'descr_long'} = $descr;
5507                         $pr->{'descr'} = chop_str($descr, $projects_list_description_width, 5);
5508                 }
5509                 if (project_info_needs_filling($pr, $filter_set->('owner'))) {
5510                         $pr->{'owner'} = git_get_project_owner("$pr->{'path'}") || "";
5511                 }
5512                 if ($show_ctags &&
5513                     project_info_needs_filling($pr, $filter_set->('ctags'))) {
5514                         $pr->{'ctags'} = git_get_project_ctags($pr->{'path'});
5515                 }
5516                 if ($projects_list_group_categories &&
5517                     project_info_needs_filling($pr, $filter_set->('category'))) {
5518                         my $cat = git_get_project_category($pr->{'path'}) ||
5519                                                            $project_list_default_category;
5520                         $pr->{'category'} = to_utf8($cat);
5521                 }
5522
5523                 push @projects, $pr;
5524         }
5525
5526         return @projects;
5527 }
5528
5529 sub sort_projects_list {
5530         my ($projlist, $order) = @_;
5531
5532         sub order_str {
5533                 my $key = shift;
5534                 return sub { $a->{$key} cmp $b->{$key} };
5535         }
5536
5537         sub order_num_then_undef {
5538                 my $key = shift;
5539                 return sub {
5540                         defined $a->{$key} ?
5541                                 (defined $b->{$key} ? $a->{$key} <=> $b->{$key} : -1) :
5542                                 (defined $b->{$key} ? 1 : 0)
5543                 };
5544         }
5545
5546         my %orderings = (
5547                 project => order_str('path'),
5548                 descr => order_str('descr_long'),
5549                 owner => order_str('owner'),
5550                 age => order_num_then_undef('age'),
5551         );
5552
5553         my $ordering = $orderings{$order};
5554         return defined $ordering ? sort $ordering @$projlist : @$projlist;
5555 }
5556
5557 # returns a hash of categories, containing the list of project
5558 # belonging to each category
5559 sub build_projlist_by_category {
5560         my ($projlist, $from, $to) = @_;
5561         my %categories;
5562
5563         $from = 0 unless defined $from;
5564         $to = $#$projlist if (!defined $to || $#$projlist < $to);
5565
5566         for (my $i = $from; $i <= $to; $i++) {
5567                 my $pr = $projlist->[$i];
5568                 push @{$categories{ $pr->{'category'} }}, $pr;
5569         }
5570
5571         return wantarray ? %categories : \%categories;
5572 }
5573
5574 # print 'sort by' <th> element, generating 'sort by $name' replay link
5575 # if that order is not selected
5576 sub print_sort_th {
5577         print format_sort_th(@_);
5578 }
5579
5580 sub format_sort_th {
5581         my ($name, $order, $header) = @_;
5582         my $sort_th = "";
5583         $header ||= ucfirst($name);
5584
5585         if ($order eq $name) {
5586                 $sort_th .= "<th>$header</th>\n";
5587         } else {
5588                 $sort_th .= "<th>" .
5589                             $cgi->a({-href => href(-replay=>1, order=>$name),
5590                                      -class => "header"}, $header) .
5591                             "</th>\n";
5592         }
5593
5594         return $sort_th;
5595 }
5596
5597 sub git_project_list_rows {
5598         my ($projlist, $from, $to, $check_forks) = @_;
5599
5600         $from = 0 unless defined $from;
5601         $to = $#$projlist if (!defined $to || $#$projlist < $to);
5602
5603         my $alternate = 1;
5604         for (my $i = $from; $i <= $to; $i++) {
5605                 my $pr = $projlist->[$i];
5606
5607                 if ($alternate) {
5608                         print "<tr class=\"dark\">\n";
5609                 } else {
5610                         print "<tr class=\"light\">\n";
5611                 }
5612                 $alternate ^= 1;
5613
5614                 if ($check_forks) {
5615                         print "<td>";
5616                         if ($pr->{'forks'}) {
5617                                 my $nforks = scalar @{$pr->{'forks'}};
5618                                 if ($nforks > 0) {
5619                                         print $cgi->a({-href => href(project=>$pr->{'path'}, action=>"forks"),
5620                                                        -title => "$nforks forks"}, "+");
5621                                 } else {
5622                                         print $cgi->span({-title => "$nforks forks"}, "+");
5623                                 }
5624                         }
5625                         print "</td>\n";
5626                 }
5627                 print "<td>" . $cgi->a({-href => href(project=>$pr->{'path'}, action=>"summary"),
5628                                         -class => "list"},
5629                                        esc_html_match_hl($pr->{'path'}, $search_regexp)) .
5630                       "</td>\n" .
5631                       "<td>" . $cgi->a({-href => href(project=>$pr->{'path'}, action=>"summary"),
5632                                         -class => "list",
5633                                         -title => $pr->{'descr_long'}},
5634                                         $search_regexp
5635                                         ? esc_html_match_hl_chopped($pr->{'descr_long'},
5636                                                                     $pr->{'descr'}, $search_regexp)
5637                                         : esc_html($pr->{'descr'})) .
5638                       "</td>\n";
5639                 unless ($omit_owner) {
5640                         print "<td><i>" . chop_and_escape_str($pr->{'owner'}, 15) . "</i></td>\n";
5641                 }
5642                 unless ($omit_age_column) {
5643                         print "<td class=\"". age_class($pr->{'age'}) . "\">" .
5644                             (defined $pr->{'age_string'} ? $pr->{'age_string'} : "No commits") . "</td>\n";
5645                 }
5646                 print"<td class=\"link\">" .
5647                       $cgi->a({-href => href(project=>$pr->{'path'}, action=>"summary")}, "summary")   . " | " .
5648                       $cgi->a({-href => href(project=>$pr->{'path'}, action=>"shortlog")}, "shortlog") . " | " .
5649                       $cgi->a({-href => href(project=>$pr->{'path'}, action=>"log")}, "log") . " | " .
5650                       $cgi->a({-href => href(project=>$pr->{'path'}, action=>"tree")}, "tree") .
5651                       ($pr->{'forks'} ? " | " . $cgi->a({-href => href(project=>$pr->{'path'}, action=>"forks")}, "forks") : '') .
5652                       "</td>\n" .
5653                       "</tr>\n";
5654         }
5655 }
5656
5657 sub git_project_list_body {
5658         # actually uses global variable $project
5659         my ($projlist, $order, $from, $to, $extra, $no_header) = @_;
5660         my @projects = @$projlist;
5661
5662         my $check_forks = gitweb_check_feature('forks');
5663         my $show_ctags  = gitweb_check_feature('ctags');
5664         my $tagfilter = $show_ctags ? $input_params{'ctag'} : undef;
5665         $check_forks = undef
5666                 if ($tagfilter || $search_regexp);
5667
5668         # filtering out forks before filling info allows to do less work
5669         @projects = filter_forks_from_projects_list(\@projects)
5670                 if ($check_forks);
5671         # search_projects_list pre-fills required info
5672         @projects = search_projects_list(\@projects,
5673                                          'search_regexp' => $search_regexp,
5674                                          'tagfilter'  => $tagfilter)
5675                 if ($tagfilter || $search_regexp);
5676         # fill the rest
5677         my @all_fields = ('descr', 'descr_long', 'ctags', 'category');
5678         push @all_fields, ('age', 'age_string') unless($omit_age_column);
5679         push @all_fields, 'owner' unless($omit_owner);
5680         @projects = fill_project_list_info(\@projects, @all_fields);
5681
5682         $order ||= $default_projects_order;
5683         $from = 0 unless defined $from;
5684         $to = $#projects if (!defined $to || $#projects < $to);
5685
5686         # short circuit
5687         if ($from > $to) {
5688                 print "<center>\n".
5689                       "<b>No such projects found</b><br />\n".
5690                       "Click ".$cgi->a({-href=>href(project=>undef)},"here")." to view all projects<br />\n".
5691                       "</center>\n<br />\n";
5692                 return;
5693         }
5694
5695         @projects = sort_projects_list(\@projects, $order);
5696
5697         if ($show_ctags) {
5698                 my $ctags = git_gather_all_ctags(\@projects);
5699                 my $cloud = git_populate_project_tagcloud($ctags);
5700                 print git_show_project_tagcloud($cloud, 64);
5701         }
5702
5703         print "<table class=\"project_list\">\n";
5704         unless ($no_header) {
5705                 print "<tr>\n";
5706                 if ($check_forks) {
5707                         print "<th></th>\n";
5708                 }
5709                 print_sort_th('project', $order, 'Project');
5710                 print_sort_th('descr', $order, 'Description');
5711                 print_sort_th('owner', $order, 'Owner') unless $omit_owner;
5712                 print_sort_th('age', $order, 'Last Change') unless $omit_age_column;
5713                 print "<th></th>\n" . # for links
5714                       "</tr>\n";
5715         }
5716
5717         if ($projects_list_group_categories) {
5718                 # only display categories with projects in the $from-$to window
5719                 @projects = sort {$a->{'category'} cmp $b->{'category'}} @projects[$from..$to];
5720                 my %categories = build_projlist_by_category(\@projects, $from, $to);
5721                 foreach my $cat (sort keys %categories) {
5722                         unless ($cat eq "") {
5723                                 print "<tr>\n";
5724                                 if ($check_forks) {
5725                                         print "<td></td>\n";
5726                                 }
5727                                 print "<td class=\"category\" colspan=\"5\">".esc_html($cat)."</td>\n";
5728                                 print "</tr>\n";
5729                         }
5730
5731                         git_project_list_rows($categories{$cat}, undef, undef, $check_forks);
5732                 }
5733         } else {
5734                 git_project_list_rows(\@projects, $from, $to, $check_forks);
5735         }
5736
5737         if (defined $extra) {
5738                 print "<tr>\n";
5739                 if ($check_forks) {
5740                         print "<td></td>\n";
5741                 }
5742                 print "<td colspan=\"5\">$extra</td>\n" .
5743                       "</tr>\n";
5744         }
5745         print "</table>\n";
5746 }
5747
5748 sub git_log_body {
5749         # uses global variable $project
5750         my ($commitlist, $from, $to, $refs, $extra) = @_;
5751
5752         $from = 0 unless defined $from;
5753         $to = $#{$commitlist} if (!defined $to || $#{$commitlist} < $to);
5754
5755         for (my $i = 0; $i <= $to; $i++) {
5756                 my %co = %{$commitlist->[$i]};
5757                 next if !%co;
5758                 my $commit = $co{'id'};
5759                 my $ref = format_ref_marker($refs, $commit);
5760                 git_print_header_div('commit',
5761                                "<span class=\"age\">$co{'age_string'}</span>" .
5762                                esc_html($co{'title'}) . $ref,
5763                                $commit);
5764                 print "<div class=\"title_text\">\n" .
5765                       "<div class=\"log_link\">\n" .
5766                       $cgi->a({-href => href(action=>"commit", hash=>$commit)}, "commit") .
5767                       " | " .
5768                       $cgi->a({-href => href(action=>"commitdiff", hash=>$commit)}, "commitdiff") .
5769                       " | " .
5770                       $cgi->a({-href => href(action=>"tree", hash=>$commit, hash_base=>$commit)}, "tree") .
5771                       "<br/>\n" .
5772                       "</div>\n";
5773                       git_print_authorship(\%co, -tag => 'span');
5774                       print "<br/>\n</div>\n";
5775
5776                 print "<div class=\"log_body\">\n";
5777                 git_print_log($co{'comment'}, -final_empty_line=> 1);
5778                 print "</div>\n";
5779         }
5780         if ($extra) {
5781                 print "<div class=\"page_nav\">\n";
5782                 print "$extra\n";
5783                 print "</div>\n";
5784         }
5785 }
5786
5787 sub git_shortlog_body {
5788         # uses global variable $project
5789         my ($commitlist, $from, $to, $refs, $extra) = @_;
5790
5791         $from = 0 unless defined $from;
5792         $to = $#{$commitlist} if (!defined $to || $#{$commitlist} < $to);
5793
5794         print "<table class=\"shortlog\">\n";
5795         my $alternate = 1;
5796         for (my $i = $from; $i <= $to; $i++) {
5797                 my %co = %{$commitlist->[$i]};
5798                 my $commit = $co{'id'};
5799                 my $ref = format_ref_marker($refs, $commit);
5800                 if ($alternate) {
5801                         print "<tr class=\"dark\">\n";
5802                 } else {
5803                         print "<tr class=\"light\">\n";
5804                 }
5805                 $alternate ^= 1;
5806                 # git_summary() used print "<td><i>$co{'age_string'}</i></td>\n" .
5807                 print "<td title=\"$co{'age_string_age'}\"><i>$co{'age_string_date'}</i></td>\n" .
5808                       format_author_html('td', \%co, 10) . "<td>";
5809                 print format_subject_html($co{'title'}, $co{'title_short'},
5810                                           href(action=>"commit", hash=>$commit), $ref);
5811                 print "</td>\n" .
5812                       "<td class=\"link\">" .
5813                       $cgi->a({-href => href(action=>"commit", hash=>$commit)}, "commit") . " | " .
5814                       $cgi->a({-href => href(action=>"commitdiff", hash=>$commit)}, "commitdiff") . " | " .
5815                       $cgi->a({-href => href(action=>"tree", hash=>$commit, hash_base=>$commit)}, "tree");
5816                 my $snapshot_links = format_snapshot_links($commit);
5817                 if (defined $snapshot_links) {
5818                         print " | " . $snapshot_links;
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_history_body {
5832         # Warning: assumes constant type (blob or tree) during history
5833         my ($commitlist, $from, $to, $refs, $extra,
5834             $file_name, $file_hash, $ftype) = @_;
5835
5836         $from = 0 unless defined $from;
5837         $to = $#{$commitlist} unless (defined $to && $to <= $#{$commitlist});
5838
5839         print "<table class=\"history\">\n";
5840         my $alternate = 1;
5841         for (my $i = $from; $i <= $to; $i++) {
5842                 my %co = %{$commitlist->[$i]};
5843                 if (!%co) {
5844                         next;
5845                 }
5846                 my $commit = $co{'id'};
5847
5848                 my $ref = format_ref_marker($refs, $commit);
5849
5850                 if ($alternate) {
5851                         print "<tr class=\"dark\">\n";
5852                 } else {
5853                         print "<tr class=\"light\">\n";
5854                 }
5855                 $alternate ^= 1;
5856                 print "<td title=\"$co{'age_string_age'}\"><i>$co{'age_string_date'}</i></td>\n" .
5857         # shortlog:   format_author_html('td', \%co, 10)
5858                       format_author_html('td', \%co, 15, 3) . "<td>";
5859                 # originally git_history used chop_str($co{'title'}, 50)
5860                 print format_subject_html($co{'title'}, $co{'title_short'},
5861                                           href(action=>"commit", hash=>$commit), $ref);
5862                 print "</td>\n" .
5863                       "<td class=\"link\">" .
5864                       $cgi->a({-href => href(action=>$ftype, hash_base=>$commit, file_name=>$file_name)}, $ftype) . " | " .
5865                       $cgi->a({-href => href(action=>"commitdiff", hash=>$commit)}, "commitdiff");
5866
5867                 if ($ftype eq 'blob') {
5868                         my $blob_current = $file_hash;
5869                         my $blob_parent  = git_get_hash_by_path($commit, $file_name);
5870                         if (defined $blob_current && defined $blob_parent &&
5871                                         $blob_current ne $blob_parent) {
5872                                 print " | " .
5873                                         $cgi->a({-href => href(action=>"blobdiff",
5874                                                                hash=>$blob_current, hash_parent=>$blob_parent,
5875                                                                hash_base=>$hash_base, hash_parent_base=>$commit,
5876                                                                file_name=>$file_name)},
5877                                                 "diff to current");
5878                         }
5879                 }
5880                 print "</td>\n" .
5881                       "</tr>\n";
5882         }
5883         if (defined $extra) {
5884                 print "<tr>\n" .
5885                       "<td colspan=\"4\">$extra</td>\n" .
5886                       "</tr>\n";
5887         }
5888         print "</table>\n";
5889 }
5890
5891 sub git_tags_body {
5892         # uses global variable $project
5893         my ($taglist, $from, $to, $extra) = @_;
5894         $from = 0 unless defined $from;
5895         $to = $#{$taglist} if (!defined $to || $#{$taglist} < $to);
5896
5897         print "<table class=\"tags\">\n";
5898         my $alternate = 1;
5899         for (my $i = $from; $i <= $to; $i++) {
5900                 my $entry = $taglist->[$i];
5901                 my %tag = %$entry;
5902                 my $comment = $tag{'subject'};
5903                 my $comment_short;
5904                 if (defined $comment) {
5905                         $comment_short = chop_str($comment, 30, 5);
5906                 }
5907                 if ($alternate) {
5908                         print "<tr class=\"dark\">\n";
5909                 } else {
5910                         print "<tr class=\"light\">\n";
5911                 }
5912                 $alternate ^= 1;
5913                 if (defined $tag{'age'}) {
5914                         print "<td><i>$tag{'age'}</i></td>\n";
5915                 } else {
5916                         print "<td></td>\n";
5917                 }
5918                 print "<td>" .
5919                       $cgi->a({-href => href(action=>$tag{'reftype'}, hash=>$tag{'refid'}),
5920                                -class => "list name"}, esc_html($tag{'name'})) .
5921                       "</td>\n" .
5922                       "<td>";
5923                 if (defined $comment) {
5924                         print format_subject_html($comment, $comment_short,
5925                                                   href(action=>"tag", hash=>$tag{'id'}));
5926                 }
5927                 print "</td>\n" .
5928                       "<td class=\"selflink\">";
5929                 if ($tag{'type'} eq "tag") {
5930                         print $cgi->a({-href => href(action=>"tag", hash=>$tag{'id'})}, "tag");
5931                 } else {
5932                         print "&nbsp;";
5933                 }
5934                 print "</td>\n" .
5935                       "<td class=\"link\">" . " | " .
5936                       $cgi->a({-href => href(action=>$tag{'reftype'}, hash=>$tag{'refid'})}, $tag{'reftype'});
5937                 if ($tag{'reftype'} eq "commit") {
5938                         print " | " . $cgi->a({-href => href(action=>"shortlog", hash=>$tag{'fullname'})}, "shortlog") .
5939                               " | " . $cgi->a({-href => href(action=>"log", hash=>$tag{'fullname'})}, "log");
5940                 } elsif ($tag{'reftype'} eq "blob") {
5941                         print " | " . $cgi->a({-href => href(action=>"blob_plain", hash=>$tag{'refid'})}, "raw");
5942                 }
5943                 print "</td>\n" .
5944                       "</tr>";
5945         }
5946         if (defined $extra) {
5947                 print "<tr>\n" .
5948                       "<td colspan=\"5\">$extra</td>\n" .
5949                       "</tr>\n";
5950         }
5951         print "</table>\n";
5952 }
5953
5954 sub git_heads_body {
5955         # uses global variable $project
5956         my ($headlist, $head_at, $from, $to, $extra) = @_;
5957         $from = 0 unless defined $from;
5958         $to = $#{$headlist} if (!defined $to || $#{$headlist} < $to);
5959
5960         print "<table class=\"heads\">\n";
5961         my $alternate = 1;
5962         for (my $i = $from; $i <= $to; $i++) {
5963                 my $entry = $headlist->[$i];
5964                 my %ref = %$entry;
5965                 my $curr = defined $head_at && $ref{'id'} eq $head_at;
5966                 if ($alternate) {
5967                         print "<tr class=\"dark\">\n";
5968                 } else {
5969                         print "<tr class=\"light\">\n";
5970                 }
5971                 $alternate ^= 1;
5972                 print "<td><i>$ref{'age'}</i></td>\n" .
5973                       ($curr ? "<td class=\"current_head\">" : "<td>") .
5974                       $cgi->a({-href => href(action=>"shortlog", hash=>$ref{'fullname'}),
5975                                -class => "list name"},esc_html($ref{'name'})) .
5976                       "</td>\n" .
5977                       "<td class=\"link\">" .
5978                       $cgi->a({-href => href(action=>"shortlog", hash=>$ref{'fullname'})}, "shortlog") . " | " .
5979                       $cgi->a({-href => href(action=>"log", hash=>$ref{'fullname'})}, "log") . " | " .
5980                       $cgi->a({-href => href(action=>"tree", hash=>$ref{'fullname'}, hash_base=>$ref{'fullname'})}, "tree") .
5981                       "</td>\n" .
5982                       "</tr>";
5983         }
5984         if (defined $extra) {
5985                 print "<tr>\n" .
5986                       "<td colspan=\"3\">$extra</td>\n" .
5987                       "</tr>\n";
5988         }
5989         print "</table>\n";
5990 }
5991
5992 # Display a single remote block
5993 sub git_remote_block {
5994         my ($remote, $rdata, $limit, $head) = @_;
5995
5996         my $heads = $rdata->{'heads'};
5997         my $fetch = $rdata->{'fetch'};
5998         my $push = $rdata->{'push'};
5999
6000         my $urls_table = "<table class=\"projects_list\">\n" ;
6001
6002         if (defined $fetch) {
6003                 if ($fetch eq $push) {
6004                         $urls_table .= format_repo_url("URL", $fetch);
6005                 } else {
6006                         $urls_table .= format_repo_url("Fetch URL", $fetch);
6007                         $urls_table .= format_repo_url("Push URL", $push) if defined $push;
6008                 }
6009         } elsif (defined $push) {
6010                 $urls_table .= format_repo_url("Push URL", $push);
6011         } else {
6012                 $urls_table .= format_repo_url("", "No remote URL");
6013         }
6014
6015         $urls_table .= "</table>\n";
6016
6017         my $dots;
6018         if (defined $limit && $limit < @$heads) {
6019                 $dots = $cgi->a({-href => href(action=>"remotes", hash=>$remote)}, "...");
6020         }
6021
6022         print $urls_table;
6023         git_heads_body($heads, $head, 0, $limit, $dots);
6024 }
6025
6026 # Display a list of remote names with the respective fetch and push URLs
6027 sub git_remotes_list {
6028         my ($remotedata, $limit) = @_;
6029         print "<table class=\"heads\">\n";
6030         my $alternate = 1;
6031         my @remotes = sort keys %$remotedata;
6032
6033         my $limited = $limit && $limit < @remotes;
6034
6035         $#remotes = $limit - 1 if $limited;
6036
6037         while (my $remote = shift @remotes) {
6038                 my $rdata = $remotedata->{$remote};
6039                 my $fetch = $rdata->{'fetch'};
6040                 my $push = $rdata->{'push'};
6041                 if ($alternate) {
6042                         print "<tr class=\"dark\">\n";
6043                 } else {
6044                         print "<tr class=\"light\">\n";
6045                 }
6046                 $alternate ^= 1;
6047                 print "<td>" .
6048                       $cgi->a({-href=> href(action=>'remotes', hash=>$remote),
6049                                -class=> "list name"},esc_html($remote)) .
6050                       "</td>";
6051                 print "<td class=\"link\">" .
6052                       (defined $fetch ? $cgi->a({-href=> $fetch}, "fetch") : "fetch") .
6053                       " | " .
6054                       (defined $push ? $cgi->a({-href=> $push}, "push") : "push") .
6055                       "</td>";
6056
6057                 print "</tr>\n";
6058         }
6059
6060         if ($limited) {
6061                 print "<tr>\n" .
6062                       "<td colspan=\"3\">" .
6063                       $cgi->a({-href => href(action=>"remotes")}, "...") .
6064                       "</td>\n" . "</tr>\n";
6065         }
6066
6067         print "</table>";
6068 }
6069
6070 # Display remote heads grouped by remote, unless there are too many
6071 # remotes, in which case we only display the remote names
6072 sub git_remotes_body {
6073         my ($remotedata, $limit, $head) = @_;
6074         if ($limit and $limit < keys %$remotedata) {
6075                 git_remotes_list($remotedata, $limit);
6076         } else {
6077                 fill_remote_heads($remotedata);
6078                 while (my ($remote, $rdata) = each %$remotedata) {
6079                         git_print_section({-class=>"remote", -id=>$remote},
6080                                 ["remotes", $remote, $remote], sub {
6081                                         git_remote_block($remote, $rdata, $limit, $head);
6082                                 });
6083                 }
6084         }
6085 }
6086
6087 sub git_search_message {
6088         my %co = @_;
6089
6090         my $greptype;
6091         if ($searchtype eq 'commit') {
6092                 $greptype = "--grep=";
6093         } elsif ($searchtype eq 'author') {
6094                 $greptype = "--author=";
6095         } elsif ($searchtype eq 'committer') {
6096                 $greptype = "--committer=";
6097         }
6098         $greptype .= $searchtext;
6099         my @commitlist = parse_commits($hash, 101, (100 * $page), undef,
6100                                        $greptype, '--regexp-ignore-case',
6101                                        $search_use_regexp ? '--extended-regexp' : '--fixed-strings');
6102
6103         my $paging_nav = '';
6104         if ($page > 0) {
6105                 $paging_nav .=
6106                         $cgi->a({-href => href(-replay=>1, page=>undef)},
6107                                 "first") .
6108                         " &sdot; " .
6109                         $cgi->a({-href => href(-replay=>1, page=>$page-1),
6110                                  -accesskey => "p", -title => "Alt-p"}, "prev");
6111         } else {
6112                 $paging_nav .= "first &sdot; prev";
6113         }
6114         my $next_link = '';
6115         if ($#commitlist >= 100) {
6116                 $next_link =
6117                         $cgi->a({-href => href(-replay=>1, page=>$page+1),
6118                                  -accesskey => "n", -title => "Alt-n"}, "next");
6119                 $paging_nav .= " &sdot; $next_link";
6120         } else {
6121                 $paging_nav .= " &sdot; next";
6122         }
6123
6124         git_header_html();
6125
6126         git_print_page_nav('','', $hash,$co{'tree'},$hash, $paging_nav);
6127         git_print_header_div('commit', esc_html($co{'title'}), $hash);
6128         if ($page == 0 && !@commitlist) {
6129                 print "<p>No match.</p>\n";
6130         } else {
6131                 git_search_grep_body(\@commitlist, 0, 99, $next_link);
6132         }
6133
6134         git_footer_html();
6135 }
6136
6137 sub git_search_changes {
6138         my %co = @_;
6139
6140         local $/ = "\n";
6141         open my $fd, '-|', git_cmd(), '--no-pager', 'log', @diff_opts,
6142                 '--pretty=format:%H', '--no-abbrev', '--raw', "-S$searchtext",
6143                 ($search_use_regexp ? '--pickaxe-regex' : ())
6144                         or die_error(500, "Open git-log failed");
6145
6146         git_header_html();
6147
6148         git_print_page_nav('','', $hash,$co{'tree'},$hash);
6149         git_print_header_div('commit', esc_html($co{'title'}), $hash);
6150
6151         print "<table class=\"pickaxe search\">\n";
6152         my $alternate = 1;
6153         undef %co;
6154         my @files;
6155         while (my $line = <$fd>) {
6156                 chomp $line;
6157                 next unless $line;
6158
6159                 my %set = parse_difftree_raw_line($line);
6160                 if (defined $set{'commit'}) {
6161                         # finish previous commit
6162                         if (%co) {
6163                                 print "</td>\n" .
6164                                       "<td class=\"link\">" .
6165                                       $cgi->a({-href => href(action=>"commit", hash=>$co{'id'})},
6166                                               "commit") .
6167                                       " | " .
6168                                       $cgi->a({-href => href(action=>"tree", hash=>$co{'tree'},
6169                                                              hash_base=>$co{'id'})},
6170                                               "tree") .
6171                                       "</td>\n" .
6172                                       "</tr>\n";
6173                         }
6174
6175                         if ($alternate) {
6176                                 print "<tr class=\"dark\">\n";
6177                         } else {
6178                                 print "<tr class=\"light\">\n";
6179                         }
6180                         $alternate ^= 1;
6181                         %co = parse_commit($set{'commit'});
6182                         my $author = chop_and_escape_str($co{'author_name'}, 15, 5);
6183                         print "<td title=\"$co{'age_string_age'}\"><i>$co{'age_string_date'}</i></td>\n" .
6184                               "<td><i>$author</i></td>\n" .
6185                               "<td>" .
6186                               $cgi->a({-href => href(action=>"commit", hash=>$co{'id'}),
6187                                       -class => "list subject"},
6188                                       chop_and_escape_str($co{'title'}, 50) . "<br/>");
6189                 } elsif (defined $set{'to_id'}) {
6190                         next if ($set{'to_id'} =~ m/^0{40}$/);
6191
6192                         print $cgi->a({-href => href(action=>"blob", hash_base=>$co{'id'},
6193                                                      hash=>$set{'to_id'}, file_name=>$set{'to_file'}),
6194                                       -class => "list"},
6195                                       "<span class=\"match\">" . esc_path($set{'file'}) . "</span>") .
6196                               "<br/>\n";
6197                 }
6198         }
6199         close $fd;
6200
6201         # finish last commit (warning: repetition!)
6202         if (%co) {
6203                 print "</td>\n" .
6204                       "<td class=\"link\">" .
6205                       $cgi->a({-href => href(action=>"commit", hash=>$co{'id'})},
6206                               "commit") .
6207                       " | " .
6208                       $cgi->a({-href => href(action=>"tree", hash=>$co{'tree'},
6209                                              hash_base=>$co{'id'})},
6210                               "tree") .
6211                       "</td>\n" .
6212                       "</tr>\n";
6213         }
6214
6215         print "</table>\n";
6216
6217         git_footer_html();
6218 }
6219
6220 sub git_search_files {
6221         my %co = @_;
6222
6223         local $/ = "\n";
6224         open my $fd, "-|", git_cmd(), 'grep', '-n', '-z',
6225                 $search_use_regexp ? ('-E', '-i') : '-F',
6226                 $searchtext, $co{'tree'}
6227                         or die_error(500, "Open git-grep failed");
6228
6229         git_header_html();
6230
6231         git_print_page_nav('','', $hash,$co{'tree'},$hash);
6232         git_print_header_div('commit', esc_html($co{'title'}), $hash);
6233
6234         print "<table class=\"grep_search\">\n";
6235         my $alternate = 1;
6236         my $matches = 0;
6237         my $lastfile = '';
6238         my $file_href;
6239         while (my $line = <$fd>) {
6240                 chomp $line;
6241                 my ($file, $lno, $ltext, $binary);
6242                 last if ($matches++ > 1000);
6243                 if ($line =~ /^Binary file (.+) matches$/) {
6244                         $file = $1;
6245                         $binary = 1;
6246                 } else {
6247                         ($file, $lno, $ltext) = split(/\0/, $line, 3);
6248                         $file =~ s/^$co{'tree'}://;
6249                 }
6250                 if ($file ne $lastfile) {
6251                         $lastfile and print "</td></tr>\n";
6252                         if ($alternate++) {
6253                                 print "<tr class=\"dark\">\n";
6254                         } else {
6255                                 print "<tr class=\"light\">\n";
6256                         }
6257                         $file_href = href(action=>"blob", hash_base=>$co{'id'},
6258                                           file_name=>$file);
6259                         print "<td class=\"list\">".
6260                                 $cgi->a({-href => $file_href, -class => "list"}, esc_path($file));
6261                         print "</td><td>\n";
6262                         $lastfile = $file;
6263                 }
6264                 if ($binary) {
6265                         print "<div class=\"binary\">Binary file</div>\n";
6266                 } else {
6267                         $ltext = untabify($ltext);
6268                         if ($ltext =~ m/^(.*)($search_regexp)(.*)$/i) {
6269                                 $ltext = esc_html($1, -nbsp=>1);
6270                                 $ltext .= '<span class="match">';
6271                                 $ltext .= esc_html($2, -nbsp=>1);
6272                                 $ltext .= '</span>';
6273                                 $ltext .= esc_html($3, -nbsp=>1);
6274                         } else {
6275                                 $ltext = esc_html($ltext, -nbsp=>1);
6276                         }
6277                         print "<div class=\"pre\">" .
6278                                 $cgi->a({-href => $file_href.'#l'.$lno,
6279                                         -class => "linenr"}, sprintf('%4i', $lno)) .
6280                                 ' ' .  $ltext . "</div>\n";
6281                 }
6282         }
6283         if ($lastfile) {
6284                 print "</td></tr>\n";
6285                 if ($matches > 1000) {
6286                         print "<div class=\"diff nodifferences\">Too many matches, listing trimmed</div>\n";
6287                 }
6288         } else {
6289                 print "<div class=\"diff nodifferences\">No matches found</div>\n";
6290         }
6291         close $fd;
6292
6293         print "</table>\n";
6294
6295         git_footer_html();
6296 }
6297
6298 sub git_search_grep_body {
6299         my ($commitlist, $from, $to, $extra) = @_;
6300         $from = 0 unless defined $from;
6301         $to = $#{$commitlist} if (!defined $to || $#{$commitlist} < $to);
6302
6303         print "<table class=\"commit_search\">\n";
6304         my $alternate = 1;
6305         for (my $i = $from; $i <= $to; $i++) {
6306                 my %co = %{$commitlist->[$i]};
6307                 if (!%co) {
6308                         next;
6309                 }
6310                 my $commit = $co{'id'};
6311                 if ($alternate) {
6312                         print "<tr class=\"dark\">\n";
6313                 } else {
6314                         print "<tr class=\"light\">\n";
6315                 }
6316                 $alternate ^= 1;
6317                 print "<td title=\"$co{'age_string_age'}\"><i>$co{'age_string_date'}</i></td>\n" .
6318                       format_author_html('td', \%co, 15, 5) .
6319                       "<td>" .
6320                       $cgi->a({-href => href(action=>"commit", hash=>$co{'id'}),
6321                                -class => "list subject"},
6322                               chop_and_escape_str($co{'title'}, 50) . "<br/>");
6323                 my $comment = $co{'comment'};
6324                 foreach my $line (@$comment) {
6325                         if ($line =~ m/^(.*?)($search_regexp)(.*)$/i) {
6326                                 my ($lead, $match, $trail) = ($1, $2, $3);
6327                                 $match = chop_str($match, 70, 5, 'center');
6328                                 my $contextlen = int((80 - length($match))/2);
6329                                 $contextlen = 30 if ($contextlen > 30);
6330                                 $lead  = chop_str($lead,  $contextlen, 10, 'left');
6331                                 $trail = chop_str($trail, $contextlen, 10, 'right');
6332
6333                                 $lead  = esc_html($lead);
6334                                 $match = esc_html($match);
6335                                 $trail = esc_html($trail);
6336
6337                                 print "$lead<span class=\"match\">$match</span>$trail<br />";
6338                         }
6339                 }
6340                 print "</td>\n" .
6341                       "<td class=\"link\">" .
6342                       $cgi->a({-href => href(action=>"commit", hash=>$co{'id'})}, "commit") .
6343                       " | " .
6344                       $cgi->a({-href => href(action=>"commitdiff", hash=>$co{'id'})}, "commitdiff") .
6345                       " | " .
6346                       $cgi->a({-href => href(action=>"tree", hash=>$co{'tree'}, hash_base=>$co{'id'})}, "tree");
6347                 print "</td>\n" .
6348                       "</tr>\n";
6349         }
6350         if (defined $extra) {
6351                 print "<tr>\n" .
6352                       "<td colspan=\"3\">$extra</td>\n" .
6353                       "</tr>\n";
6354         }
6355         print "</table>\n";
6356 }
6357
6358 ## ======================================================================
6359 ## ======================================================================
6360 ## actions
6361
6362 sub git_project_list {
6363         my $order = $input_params{'order'};
6364         if (defined $order && $order !~ m/none|project|descr|owner|age/) {
6365                 die_error(400, "Unknown order parameter");
6366         }
6367
6368         my @list = git_get_projects_list($project_filter, $strict_export);
6369         if (!@list) {
6370                 die_error(404, "No projects found");
6371         }
6372
6373         git_header_html();
6374         if (defined $home_text && -f $home_text) {
6375                 print "<div class=\"index_include\">\n";
6376                 insert_file($home_text);
6377                 print "</div>\n";
6378         }
6379
6380         git_project_search_form($searchtext, $search_use_regexp);
6381         git_project_list_body(\@list, $order);
6382         git_footer_html();
6383 }
6384
6385 sub git_forks {
6386         my $order = $input_params{'order'};
6387         if (defined $order && $order !~ m/none|project|descr|owner|age/) {
6388                 die_error(400, "Unknown order parameter");
6389         }
6390
6391         my $filter = $project;
6392         $filter =~ s/\.git$//;
6393         my @list = git_get_projects_list($filter);
6394         if (!@list) {
6395                 die_error(404, "No forks found");
6396         }
6397
6398         git_header_html();
6399         git_print_page_nav('','');
6400         git_print_header_div('summary', "$project forks");
6401         git_project_list_body(\@list, $order);
6402         git_footer_html();
6403 }
6404
6405 sub git_project_index {
6406         my @projects = git_get_projects_list($project_filter, $strict_export);
6407         if (!@projects) {
6408                 die_error(404, "No projects found");
6409         }
6410
6411         print $cgi->header(
6412                 -type => 'text/plain',
6413                 -charset => 'utf-8',
6414                 -content_disposition => 'inline; filename="index.aux"');
6415
6416         foreach my $pr (@projects) {
6417                 if (!exists $pr->{'owner'}) {
6418                         $pr->{'owner'} = git_get_project_owner("$pr->{'path'}");
6419                 }
6420
6421                 my ($path, $owner) = ($pr->{'path'}, $pr->{'owner'});
6422                 # quote as in CGI::Util::encode, but keep the slash, and use '+' for ' '
6423                 $path  =~ s/([^a-zA-Z0-9_.\-\/ ])/sprintf("%%%02X", ord($1))/eg;
6424                 $owner =~ s/([^a-zA-Z0-9_.\-\/ ])/sprintf("%%%02X", ord($1))/eg;
6425                 $path  =~ s/ /\+/g;
6426                 $owner =~ s/ /\+/g;
6427
6428                 print "$path $owner\n";
6429         }
6430 }
6431
6432 sub git_summary {
6433         my $descr = git_get_project_description($project) || "none";
6434         my %co = parse_commit("HEAD");
6435         my %cd = %co ? parse_date($co{'committer_epoch'}, $co{'committer_tz'}) : ();
6436         my $head = $co{'id'};
6437         my $remote_heads = gitweb_check_feature('remote_heads');
6438
6439         my $owner = git_get_project_owner($project);
6440
6441         my $refs = git_get_references();
6442         # These get_*_list functions return one more to allow us to see if
6443         # there are more ...
6444         my @taglist  = git_get_tags_list(16);
6445         my @headlist = git_get_heads_list(16);
6446         my %remotedata = $remote_heads ? git_get_remotes_list() : ();
6447         my @forklist;
6448         my $check_forks = gitweb_check_feature('forks');
6449
6450         if ($check_forks) {
6451                 # find forks of a project
6452                 my $filter = $project;
6453                 $filter =~ s/\.git$//;
6454                 @forklist = git_get_projects_list($filter);
6455                 # filter out forks of forks
6456                 @forklist = filter_forks_from_projects_list(\@forklist)
6457                         if (@forklist);
6458         }
6459
6460         git_header_html();
6461         git_print_page_nav('summary','', $head);
6462
6463         print "<div class=\"title\">&nbsp;</div>\n";
6464         print "<table class=\"projects_list\">\n" .
6465               "<tr id=\"metadata_desc\"><td>description</td><td>" . esc_html($descr) . "</td></tr>\n";
6466         unless ($omit_owner) {
6467                 print  "<tr id=\"metadata_owner\"><td>owner</td><td>" . esc_html($owner) . "</td></tr>\n";
6468         }
6469         if (defined $cd{'rfc2822'}) {
6470                 print "<tr id=\"metadata_lchange\"><td>last change</td>" .
6471                       "<td>".format_timestamp_html(\%cd)."</td></tr>\n";
6472         }
6473
6474         # use per project git URL list in $projectroot/$project/cloneurl
6475         # or make project git URL from git base URL and project name
6476         my $url_tag = "URL";
6477         my @url_list = git_get_project_url_list($project);
6478         @url_list = map { "$_/$project" } @git_base_url_list unless @url_list;
6479         foreach my $git_url (@url_list) {
6480                 next unless $git_url;
6481                 print format_repo_url($url_tag, $git_url);
6482                 $url_tag = "";
6483         }
6484
6485         # Tag cloud
6486         my $show_ctags = gitweb_check_feature('ctags');
6487         if ($show_ctags) {
6488                 my $ctags = git_get_project_ctags($project);
6489                 if (%$ctags) {
6490                         # without ability to add tags, don't show if there are none
6491                         my $cloud = git_populate_project_tagcloud($ctags);
6492                         print "<tr id=\"metadata_ctags\">" .
6493                               "<td>content tags</td>" .
6494                               "<td>".git_show_project_tagcloud($cloud, 48)."</td>" .
6495                               "</tr>\n";
6496                 }
6497         }
6498
6499         print "</table>\n";
6500
6501         # If XSS prevention is on, we don't include README.html.
6502         # TODO: Allow a readme in some safe format.
6503         if (!$prevent_xss && -s "$projectroot/$project/README.html") {
6504                 print "<div class=\"title\">readme</div>\n" .
6505                       "<div class=\"readme\">\n";
6506                 insert_file("$projectroot/$project/README.html");
6507                 print "\n</div>\n"; # class="readme"
6508         }
6509
6510         # we need to request one more than 16 (0..15) to check if
6511         # those 16 are all
6512         my @commitlist = $head ? parse_commits($head, 17) : ();
6513         if (@commitlist) {
6514                 git_print_header_div('shortlog');
6515                 git_shortlog_body(\@commitlist, 0, 15, $refs,
6516                                   $#commitlist <=  15 ? undef :
6517                                   $cgi->a({-href => href(action=>"shortlog")}, "..."));
6518         }
6519
6520         if (@taglist) {
6521                 git_print_header_div('tags');
6522                 git_tags_body(\@taglist, 0, 15,
6523                               $#taglist <=  15 ? undef :
6524                               $cgi->a({-href => href(action=>"tags")}, "..."));
6525         }
6526
6527         if (@headlist) {
6528                 git_print_header_div('heads');
6529                 git_heads_body(\@headlist, $head, 0, 15,
6530                                $#headlist <= 15 ? undef :
6531                                $cgi->a({-href => href(action=>"heads")}, "..."));
6532         }
6533
6534         if (%remotedata) {
6535                 git_print_header_div('remotes');
6536                 git_remotes_body(\%remotedata, 15, $head);
6537         }
6538
6539         if (@forklist) {
6540                 git_print_header_div('forks');
6541                 git_project_list_body(\@forklist, 'age', 0, 15,
6542                                       $#forklist <= 15 ? undef :
6543                                       $cgi->a({-href => href(action=>"forks")}, "..."),
6544                                       'no_header');
6545         }
6546
6547         git_footer_html();
6548 }
6549
6550 sub git_tag {
6551         my %tag = parse_tag($hash);
6552
6553         if (! %tag) {
6554                 die_error(404, "Unknown tag object");
6555         }
6556
6557         my $head = git_get_head_hash($project);
6558         git_header_html();
6559         git_print_page_nav('','', $head,undef,$head);
6560         git_print_header_div('commit', esc_html($tag{'name'}), $hash);
6561         print "<div class=\"title_text\">\n" .
6562               "<table class=\"object_header\">\n" .
6563               "<tr>\n" .
6564               "<td>object</td>\n" .
6565               "<td>" . $cgi->a({-class => "list", -href => href(action=>$tag{'type'}, hash=>$tag{'object'})},
6566                                $tag{'object'}) . "</td>\n" .
6567               "<td class=\"link\">" . $cgi->a({-href => href(action=>$tag{'type'}, hash=>$tag{'object'})},
6568                                               $tag{'type'}) . "</td>\n" .
6569               "</tr>\n";
6570         if (defined($tag{'author'})) {
6571                 git_print_authorship_rows(\%tag, 'author');
6572         }
6573         print "</table>\n\n" .
6574               "</div>\n";
6575         print "<div class=\"page_body\">";
6576         my $comment = $tag{'comment'};
6577         foreach my $line (@$comment) {
6578                 chomp $line;
6579                 print esc_html($line, -nbsp=>1) . "<br/>\n";
6580         }
6581         print "</div>\n";
6582         git_footer_html();
6583 }
6584
6585 sub git_blame_common {
6586         my $format = shift || 'porcelain';
6587         if ($format eq 'porcelain' && $input_params{'javascript'}) {
6588                 $format = 'incremental';
6589                 $action = 'blame_incremental'; # for page title etc
6590         }
6591
6592         # permissions
6593         gitweb_check_feature('blame')
6594                 or die_error(403, "Blame view not allowed");
6595
6596         # error checking
6597         die_error(400, "No file name given") unless $file_name;
6598         $hash_base ||= git_get_head_hash($project);
6599         die_error(404, "Couldn't find base commit") unless $hash_base;
6600         my %co = parse_commit($hash_base)
6601                 or die_error(404, "Commit not found");
6602         my $ftype = "blob";
6603         if (!defined $hash) {
6604                 $hash = git_get_hash_by_path($hash_base, $file_name, "blob")
6605                         or die_error(404, "Error looking up file");
6606         } else {
6607                 $ftype = git_get_type($hash);
6608                 if ($ftype !~ "blob") {
6609                         die_error(400, "Object is not a blob");
6610                 }
6611         }
6612
6613         my $fd;
6614         if ($format eq 'incremental') {
6615                 # get file contents (as base)
6616                 open $fd, "-|", git_cmd(), 'cat-file', 'blob', $hash
6617                         or die_error(500, "Open git-cat-file failed");
6618         } elsif ($format eq 'data') {
6619                 # run git-blame --incremental
6620                 open $fd, "-|", git_cmd(), "blame", "--incremental",
6621                         $hash_base, "--", $file_name
6622                         or die_error(500, "Open git-blame --incremental failed");
6623         } else {
6624                 # run git-blame --porcelain
6625                 open $fd, "-|", git_cmd(), "blame", '-p',
6626                         $hash_base, '--', $file_name
6627                         or die_error(500, "Open git-blame --porcelain failed");
6628         }
6629
6630         # incremental blame data returns early
6631         if ($format eq 'data') {
6632                 print $cgi->header(
6633                         -type=>"text/plain", -charset => "utf-8",
6634                         -status=> "200 OK");
6635                 local $| = 1; # output autoflush
6636                 while (my $line = <$fd>) {
6637                         print to_utf8($line);
6638                 }
6639                 close $fd
6640                         or print "ERROR $!\n";
6641
6642                 print 'END';
6643                 if (defined $t0 && gitweb_check_feature('timed')) {
6644                         print ' '.
6645                               tv_interval($t0, [ gettimeofday() ]).
6646                               ' '.$number_of_git_cmds;
6647                 }
6648                 print "\n";
6649
6650                 return;
6651         }
6652
6653         # page header
6654         git_header_html();
6655         my $formats_nav =
6656                 $cgi->a({-href => href(action=>"blob", -replay=>1)},
6657                         "blob") .
6658                 " | ";
6659         if ($format eq 'incremental') {
6660                 $formats_nav .=
6661                         $cgi->a({-href => href(action=>"blame", javascript=>0, -replay=>1)},
6662                                 "blame") . " (non-incremental)";
6663         } else {
6664                 $formats_nav .=
6665                         $cgi->a({-href => href(action=>"blame_incremental", -replay=>1)},
6666                                 "blame") . " (incremental)";
6667         }
6668         $formats_nav .=
6669                 " | " .
6670                 $cgi->a({-href => href(action=>"history", -replay=>1)},
6671                         "history") .
6672                 " | " .
6673                 $cgi->a({-href => href(action=>$action, file_name=>$file_name)},
6674                         "HEAD");
6675         git_print_page_nav('','', $hash_base,$co{'tree'},$hash_base, $formats_nav);
6676         git_print_header_div('commit', esc_html($co{'title'}), $hash_base);
6677         git_print_page_path($file_name, $ftype, $hash_base);
6678
6679         # page body
6680         if ($format eq 'incremental') {
6681                 print "<noscript>\n<div class=\"error\"><center><b>\n".
6682                       "This page requires JavaScript to run.\n Use ".
6683                       $cgi->a({-href => href(action=>'blame',javascript=>0,-replay=>1)},
6684                               'this page').
6685                       " instead.\n".
6686                       "</b></center></div>\n</noscript>\n";
6687
6688                 print qq!<div id="progress_bar" style="width: 100%; background-color: yellow"></div>\n!;
6689         }
6690
6691         print qq!<div class="page_body">\n!;
6692         print qq!<div id="progress_info">... / ...</div>\n!
6693                 if ($format eq 'incremental');
6694         print qq!<table id="blame_table" class="blame" width="100%">\n!.
6695               #qq!<col width="5.5em" /><col width="2.5em" /><col width="*" />\n!.
6696               qq!<thead>\n!.
6697               qq!<tr><th>Commit</th><th>Line</th><th>Data</th></tr>\n!.
6698               qq!</thead>\n!.
6699               qq!<tbody>\n!;
6700
6701         my @rev_color = qw(light dark);
6702         my $num_colors = scalar(@rev_color);
6703         my $current_color = 0;
6704
6705         if ($format eq 'incremental') {
6706                 my $color_class = $rev_color[$current_color];
6707
6708                 #contents of a file
6709                 my $linenr = 0;
6710         LINE:
6711                 while (my $line = <$fd>) {
6712                         chomp $line;
6713                         $linenr++;
6714
6715                         print qq!<tr id="l$linenr" class="$color_class">!.
6716                               qq!<td class="sha1"><a href=""> </a></td>!.
6717                               qq!<td class="linenr">!.
6718                               qq!<a class="linenr" href="">$linenr</a></td>!;
6719                         print qq!<td class="pre">! . esc_html($line) . "</td>\n";
6720                         print qq!</tr>\n!;
6721                 }
6722
6723         } else { # porcelain, i.e. ordinary blame
6724                 my %metainfo = (); # saves information about commits
6725
6726                 # blame data
6727         LINE:
6728                 while (my $line = <$fd>) {
6729                         chomp $line;
6730                         # the header: <SHA-1> <src lineno> <dst lineno> [<lines in group>]
6731                         # no <lines in group> for subsequent lines in group of lines
6732                         my ($full_rev, $orig_lineno, $lineno, $group_size) =
6733                            ($line =~ /^([0-9a-f]{40}) (\d+) (\d+)(?: (\d+))?$/);
6734                         if (!exists $metainfo{$full_rev}) {
6735                                 $metainfo{$full_rev} = { 'nprevious' => 0 };
6736                         }
6737                         my $meta = $metainfo{$full_rev};
6738                         my $data;
6739                         while ($data = <$fd>) {
6740                                 chomp $data;
6741                                 last if ($data =~ s/^\t//); # contents of line
6742                                 if ($data =~ /^(\S+)(?: (.*))?$/) {
6743                                         $meta->{$1} = $2 unless exists $meta->{$1};
6744                                 }
6745                                 if ($data =~ /^previous /) {
6746                                         $meta->{'nprevious'}++;
6747                                 }
6748                         }
6749                         my $short_rev = substr($full_rev, 0, 8);
6750                         my $author = $meta->{'author'};
6751                         my %date =
6752                                 parse_date($meta->{'author-time'}, $meta->{'author-tz'});
6753                         my $date = $date{'iso-tz'};
6754                         if ($group_size) {
6755                                 $current_color = ($current_color + 1) % $num_colors;
6756                         }
6757                         my $tr_class = $rev_color[$current_color];
6758                         $tr_class .= ' boundary' if (exists $meta->{'boundary'});
6759                         $tr_class .= ' no-previous' if ($meta->{'nprevious'} == 0);
6760                         $tr_class .= ' multiple-previous' if ($meta->{'nprevious'} > 1);
6761                         print "<tr id=\"l$lineno\" class=\"$tr_class\">\n";
6762                         if ($group_size) {
6763                                 print "<td class=\"sha1\"";
6764                                 print " title=\"". esc_html($author) . ", $date\"";
6765                                 print " rowspan=\"$group_size\"" if ($group_size > 1);
6766                                 print ">";
6767                                 print $cgi->a({-href => href(action=>"commit",
6768                                                              hash=>$full_rev,
6769                                                              file_name=>$file_name)},
6770                                               esc_html($short_rev));
6771                                 if ($group_size >= 2) {
6772                                         my @author_initials = ($author =~ /\b([[:upper:]])\B/g);
6773                                         if (@author_initials) {
6774                                                 print "<br />" .
6775                                                       esc_html(join('', @author_initials));
6776                                                 #           or join('.', ...)
6777                                         }
6778                                 }
6779                                 print "</td>\n";
6780                         }
6781                         # 'previous' <sha1 of parent commit> <filename at commit>
6782                         if (exists $meta->{'previous'} &&
6783                             $meta->{'previous'} =~ /^([a-fA-F0-9]{40}) (.*)$/) {
6784                                 $meta->{'parent'} = $1;
6785                                 $meta->{'file_parent'} = unquote($2);
6786                         }
6787                         my $linenr_commit =
6788                                 exists($meta->{'parent'}) ?
6789                                 $meta->{'parent'} : $full_rev;
6790                         my $linenr_filename =
6791                                 exists($meta->{'file_parent'}) ?
6792                                 $meta->{'file_parent'} : unquote($meta->{'filename'});
6793                         my $blamed = href(action => 'blame',
6794                                           file_name => $linenr_filename,
6795                                           hash_base => $linenr_commit);
6796                         print "<td class=\"linenr\">";
6797                         print $cgi->a({ -href => "$blamed#l$orig_lineno",
6798                                         -class => "linenr" },
6799                                       esc_html($lineno));
6800                         print "</td>";
6801                         print "<td class=\"pre\">" . esc_html($data) . "</td>\n";
6802                         print "</tr>\n";
6803                 } # end while
6804
6805         }
6806
6807         # footer
6808         print "</tbody>\n".
6809               "</table>\n"; # class="blame"
6810         print "</div>\n";   # class="blame_body"
6811         close $fd
6812                 or print "Reading blob failed\n";
6813
6814         git_footer_html();
6815 }
6816
6817 sub git_blame {
6818         git_blame_common();
6819 }
6820
6821 sub git_blame_incremental {
6822         git_blame_common('incremental');
6823 }
6824
6825 sub git_blame_data {
6826         git_blame_common('data');
6827 }
6828
6829 sub git_tags {
6830         my $head = git_get_head_hash($project);
6831         git_header_html();
6832         git_print_page_nav('','', $head,undef,$head,format_ref_views('tags'));
6833         git_print_header_div('summary', $project);
6834
6835         my @tagslist = git_get_tags_list();
6836         if (@tagslist) {
6837                 git_tags_body(\@tagslist);
6838         }
6839         git_footer_html();
6840 }
6841
6842 sub git_heads {
6843         my $head = git_get_head_hash($project);
6844         git_header_html();
6845         git_print_page_nav('','', $head,undef,$head,format_ref_views('heads'));
6846         git_print_header_div('summary', $project);
6847
6848         my @headslist = git_get_heads_list();
6849         if (@headslist) {
6850                 git_heads_body(\@headslist, $head);
6851         }
6852         git_footer_html();
6853 }
6854
6855 # used both for single remote view and for list of all the remotes
6856 sub git_remotes {
6857         gitweb_check_feature('remote_heads')
6858                 or die_error(403, "Remote heads view is disabled");
6859
6860         my $head = git_get_head_hash($project);
6861         my $remote = $input_params{'hash'};
6862
6863         my $remotedata = git_get_remotes_list($remote);
6864         die_error(500, "Unable to get remote information") unless defined $remotedata;
6865
6866         unless (%$remotedata) {
6867                 die_error(404, defined $remote ?
6868                         "Remote $remote not found" :
6869                         "No remotes found");
6870         }
6871
6872         git_header_html(undef, undef, -action_extra => $remote);
6873         git_print_page_nav('', '',  $head, undef, $head,
6874                 format_ref_views($remote ? '' : 'remotes'));
6875
6876         fill_remote_heads($remotedata);
6877         if (defined $remote) {
6878                 git_print_header_div('remotes', "$remote remote for $project");
6879                 git_remote_block($remote, $remotedata->{$remote}, undef, $head);
6880         } else {
6881                 git_print_header_div('summary', "$project remotes");
6882                 git_remotes_body($remotedata, undef, $head);
6883         }
6884
6885         git_footer_html();
6886 }
6887
6888 sub git_blob_plain {
6889         my $type = shift;
6890         my $expires;
6891
6892         if (!defined $hash) {
6893                 if (defined $file_name) {
6894                         my $base = $hash_base || git_get_head_hash($project);
6895                         $hash = git_get_hash_by_path($base, $file_name, "blob")
6896                                 or die_error(404, "Cannot find file");
6897                 } else {
6898                         die_error(400, "No file name defined");
6899                 }
6900         } elsif ($hash =~ m/^[0-9a-fA-F]{40}$/) {
6901                 # blobs defined by non-textual hash id's can be cached
6902                 $expires = "+1d";
6903         }
6904
6905         open my $fd, "-|", git_cmd(), "cat-file", "blob", $hash
6906                 or die_error(500, "Open git-cat-file blob '$hash' failed");
6907
6908         # content-type (can include charset)
6909         $type = blob_contenttype($fd, $file_name, $type);
6910
6911         # "save as" filename, even when no $file_name is given
6912         my $save_as = "$hash";
6913         if (defined $file_name) {
6914                 $save_as = $file_name;
6915         } elsif ($type =~ m/^text\//) {
6916                 $save_as .= '.txt';
6917         }
6918
6919         # With XSS prevention on, blobs of all types except a few known safe
6920         # ones are served with "Content-Disposition: attachment" to make sure
6921         # they don't run in our security domain.  For certain image types,
6922         # blob view writes an <img> tag referring to blob_plain view, and we
6923         # want to be sure not to break that by serving the image as an
6924         # attachment (though Firefox 3 doesn't seem to care).
6925         my $sandbox = $prevent_xss &&
6926                 $type !~ m!^(?:text/[a-z]+|image/(?:gif|png|jpeg))(?:[ ;]|$)!;
6927
6928         # serve text/* as text/plain
6929         if ($prevent_xss &&
6930             ($type =~ m!^text/[a-z]+\b(.*)$! ||
6931              ($type =~ m!^[a-z]+/[a-z]\+xml\b(.*)$! && -T $fd))) {
6932                 my $rest = $1;
6933                 $rest = defined $rest ? $rest : '';
6934                 $type = "text/plain$rest";
6935         }
6936
6937         print $cgi->header(
6938                 -type => $type,
6939                 -expires => $expires,
6940                 -content_disposition =>
6941                         ($sandbox ? 'attachment' : 'inline')
6942                         . '; filename="' . $save_as . '"');
6943         local $/ = undef;
6944         binmode STDOUT, ':raw';
6945         print <$fd>;
6946         binmode STDOUT, ':utf8'; # as set at the beginning of gitweb.cgi
6947         close $fd;
6948 }
6949
6950 sub git_blob {
6951         my $expires;
6952
6953         if (!defined $hash) {
6954                 if (defined $file_name) {
6955                         my $base = $hash_base || git_get_head_hash($project);
6956                         $hash = git_get_hash_by_path($base, $file_name, "blob")
6957                                 or die_error(404, "Cannot find file");
6958                 } else {
6959                         die_error(400, "No file name defined");
6960                 }
6961         } elsif ($hash =~ m/^[0-9a-fA-F]{40}$/) {
6962                 # blobs defined by non-textual hash id's can be cached
6963                 $expires = "+1d";
6964         }
6965
6966         my $have_blame = gitweb_check_feature('blame');
6967         open my $fd, "-|", git_cmd(), "cat-file", "blob", $hash
6968                 or die_error(500, "Couldn't cat $file_name, $hash");
6969         my $mimetype = blob_mimetype($fd, $file_name);
6970         # use 'blob_plain' (aka 'raw') view for files that cannot be displayed
6971         if ($mimetype !~ m!^(?:text/|image/(?:gif|png|jpeg)$)! && -B $fd) {
6972                 close $fd;
6973                 return git_blob_plain($mimetype);
6974         }
6975         # we can have blame only for text/* mimetype
6976         $have_blame &&= ($mimetype =~ m!^text/!);
6977
6978         my $highlight = gitweb_check_feature('highlight');
6979         my $syntax = guess_file_syntax($highlight, $mimetype, $file_name);
6980         $fd = run_highlighter($fd, $highlight, $syntax)
6981                 if $syntax;
6982
6983         git_header_html(undef, $expires);
6984         my $formats_nav = '';
6985         if (defined $hash_base && (my %co = parse_commit($hash_base))) {
6986                 if (defined $file_name) {
6987                         if ($have_blame) {
6988                                 $formats_nav .=
6989                                         $cgi->a({-href => href(action=>"blame", -replay=>1)},
6990                                                 "blame") .
6991                                         " | ";
6992                         }
6993                         $formats_nav .=
6994                                 $cgi->a({-href => href(action=>"history", -replay=>1)},
6995                                         "history") .
6996                                 " | " .
6997                                 $cgi->a({-href => href(action=>"blob_plain", -replay=>1)},
6998                                         "raw") .
6999                                 " | " .
7000                                 $cgi->a({-href => href(action=>"blob",
7001                                                        hash_base=>"HEAD", file_name=>$file_name)},
7002                                         "HEAD");
7003                 } else {
7004                         $formats_nav .=
7005                                 $cgi->a({-href => href(action=>"blob_plain", -replay=>1)},
7006                                         "raw");
7007                 }
7008                 git_print_page_nav('','', $hash_base,$co{'tree'},$hash_base, $formats_nav);
7009                 git_print_header_div('commit', esc_html($co{'title'}), $hash_base);
7010         } else {
7011                 print "<div class=\"page_nav\">\n" .
7012                       "<br/><br/></div>\n" .
7013                       "<div class=\"title\">".esc_html($hash)."</div>\n";
7014         }
7015         git_print_page_path($file_name, "blob", $hash_base);
7016         print "<div class=\"page_body\">\n";
7017         if ($mimetype =~ m!^image/!) {
7018                 print qq!<img type="!.esc_attr($mimetype).qq!"!;
7019                 if ($file_name) {
7020                         print qq! alt="!.esc_attr($file_name).qq!" title="!.esc_attr($file_name).qq!"!;
7021                 }
7022                 print qq! src="! .
7023                       href(action=>"blob_plain", hash=>$hash,
7024                            hash_base=>$hash_base, file_name=>$file_name) .
7025                       qq!" />\n!;
7026         } else {
7027                 my $nr;
7028                 while (my $line = <$fd>) {
7029                         chomp $line;
7030                         $nr++;
7031                         $line = untabify($line);
7032                         printf qq!<div class="pre"><a id="l%i" href="%s#l%i" class="linenr">%4i</a> %s</div>\n!,
7033                                $nr, esc_attr(href(-replay => 1)), $nr, $nr,
7034                                $syntax ? sanitize($line) : esc_html($line, -nbsp=>1);
7035                 }
7036         }
7037         close $fd
7038                 or print "Reading blob failed.\n";
7039         print "</div>";
7040         git_footer_html();
7041 }
7042
7043 sub git_tree {
7044         if (!defined $hash_base) {
7045                 $hash_base = "HEAD";
7046         }
7047         if (!defined $hash) {
7048                 if (defined $file_name) {
7049                         $hash = git_get_hash_by_path($hash_base, $file_name, "tree");
7050                 } else {
7051                         $hash = $hash_base;
7052                 }
7053         }
7054         die_error(404, "No such tree") unless defined($hash);
7055
7056         my $show_sizes = gitweb_check_feature('show-sizes');
7057         my $have_blame = gitweb_check_feature('blame');
7058
7059         my @entries = ();
7060         {
7061                 local $/ = "\0";
7062                 open my $fd, "-|", git_cmd(), "ls-tree", '-z',
7063                         ($show_sizes ? '-l' : ()), @extra_options, $hash
7064                         or die_error(500, "Open git-ls-tree failed");
7065                 @entries = map { chomp; $_ } <$fd>;
7066                 close $fd
7067                         or die_error(404, "Reading tree failed");
7068         }
7069
7070         my $refs = git_get_references();
7071         my $ref = format_ref_marker($refs, $hash_base);
7072         git_header_html();
7073         my $basedir = '';
7074         if (defined $hash_base && (my %co = parse_commit($hash_base))) {
7075                 my @views_nav = ();
7076                 if (defined $file_name) {
7077                         push @views_nav,
7078                                 $cgi->a({-href => href(action=>"history", -replay=>1)},
7079                                         "history"),
7080                                 $cgi->a({-href => href(action=>"tree",
7081                                                        hash_base=>"HEAD", file_name=>$file_name)},
7082                                         "HEAD"),
7083                 }
7084                 my $snapshot_links = format_snapshot_links($hash);
7085                 if (defined $snapshot_links) {
7086                         # FIXME: Should be available when we have no hash base as well.
7087                         push @views_nav, $snapshot_links;
7088                 }
7089                 git_print_page_nav('tree','', $hash_base, undef, undef,
7090                                    join(' | ', @views_nav));
7091                 git_print_header_div('commit', esc_html($co{'title'}) . $ref, $hash_base);
7092         } else {
7093                 undef $hash_base;
7094                 print "<div class=\"page_nav\">\n";
7095                 print "<br/><br/></div>\n";
7096                 print "<div class=\"title\">".esc_html($hash)."</div>\n";
7097         }
7098         if (defined $file_name) {
7099                 $basedir = $file_name;
7100                 if ($basedir ne '' && substr($basedir, -1) ne '/') {
7101                         $basedir .= '/';
7102                 }
7103                 git_print_page_path($file_name, 'tree', $hash_base);
7104         }
7105         print "<div class=\"page_body\">\n";
7106         print "<table class=\"tree\">\n";
7107         my $alternate = 1;
7108         # '..' (top directory) link if possible
7109         if (defined $hash_base &&
7110             defined $file_name && $file_name =~ m![^/]+$!) {
7111                 if ($alternate) {
7112                         print "<tr class=\"dark\">\n";
7113                 } else {
7114                         print "<tr class=\"light\">\n";
7115                 }
7116                 $alternate ^= 1;
7117
7118                 my $up = $file_name;
7119                 $up =~ s!/?[^/]+$!!;
7120                 undef $up unless $up;
7121                 # based on git_print_tree_entry
7122                 print '<td class="mode">' . mode_str('040000') . "</td>\n";
7123                 print '<td class="size">&nbsp;</td>'."\n" if $show_sizes;
7124                 print '<td class="list">';
7125                 print $cgi->a({-href => href(action=>"tree",
7126                                              hash_base=>$hash_base,
7127                                              file_name=>$up)},
7128                               "..");
7129                 print "</td>\n";
7130                 print "<td class=\"link\"></td>\n";
7131
7132                 print "</tr>\n";
7133         }
7134         foreach my $line (@entries) {
7135                 my %t = parse_ls_tree_line($line, -z => 1, -l => $show_sizes);
7136
7137                 if ($alternate) {
7138                         print "<tr class=\"dark\">\n";
7139                 } else {
7140                         print "<tr class=\"light\">\n";
7141                 }
7142                 $alternate ^= 1;
7143
7144                 git_print_tree_entry(\%t, $basedir, $hash_base, $have_blame);
7145
7146                 print "</tr>\n";
7147         }
7148         print "</table>\n" .
7149               "</div>";
7150         git_footer_html();
7151 }
7152
7153 sub snapshot_name {
7154         my ($project, $hash) = @_;
7155
7156         # path/to/project.git  -> project
7157         # path/to/project/.git -> project
7158         my $name = to_utf8($project);
7159         $name =~ s,([^/])/*\.git$,$1,;
7160         $name = basename($name);
7161         # sanitize name
7162         $name =~ s/[[:cntrl:]]/?/g;
7163
7164         my $ver = $hash;
7165         if ($hash =~ /^[0-9a-fA-F]+$/) {
7166                 # shorten SHA-1 hash
7167                 my $full_hash = git_get_full_hash($project, $hash);
7168                 if ($full_hash =~ /^$hash/ && length($hash) > 7) {
7169                         $ver = git_get_short_hash($project, $hash);
7170                 }
7171         } elsif ($hash =~ m!^refs/tags/(.*)$!) {
7172                 # tags don't need shortened SHA-1 hash
7173                 $ver = $1;
7174         } else {
7175                 # branches and other need shortened SHA-1 hash
7176                 if ($hash =~ m!^refs/(?:heads|remotes)/(.*)$!) {
7177                         $ver = $1;
7178                 }
7179                 $ver .= '-' . git_get_short_hash($project, $hash);
7180         }
7181         # in case of hierarchical branch names
7182         $ver =~ s!/!.!g;
7183
7184         # name = project-version_string
7185         $name = "$name-$ver";
7186
7187         return wantarray ? ($name, $name) : $name;
7188 }
7189
7190 sub exit_if_unmodified_since {
7191         my ($latest_epoch) = @_;
7192         our $cgi;
7193
7194         my $if_modified = $cgi->http('IF_MODIFIED_SINCE');
7195         if (defined $if_modified) {
7196                 my $since;
7197                 if (eval { require HTTP::Date; 1; }) {
7198                         $since = HTTP::Date::str2time($if_modified);
7199                 } elsif (eval { require Time::ParseDate; 1; }) {
7200                         $since = Time::ParseDate::parsedate($if_modified, GMT => 1);
7201                 }
7202                 if (defined $since && $latest_epoch <= $since) {
7203                         my %latest_date = parse_date($latest_epoch);
7204                         print $cgi->header(
7205                                 -last_modified => $latest_date{'rfc2822'},
7206                                 -status => '304 Not Modified');
7207                         goto DONE_GITWEB;
7208                 }
7209         }
7210 }
7211
7212 sub git_snapshot {
7213         my $format = $input_params{'snapshot_format'};
7214         if (!@snapshot_fmts) {
7215                 die_error(403, "Snapshots not allowed");
7216         }
7217         # default to first supported snapshot format
7218         $format ||= $snapshot_fmts[0];
7219         if ($format !~ m/^[a-z0-9]+$/) {
7220                 die_error(400, "Invalid snapshot format parameter");
7221         } elsif (!exists($known_snapshot_formats{$format})) {
7222                 die_error(400, "Unknown snapshot format");
7223         } elsif ($known_snapshot_formats{$format}{'disabled'}) {
7224                 die_error(403, "Snapshot format not allowed");
7225         } elsif (!grep($_ eq $format, @snapshot_fmts)) {
7226                 die_error(403, "Unsupported snapshot format");
7227         }
7228
7229         my $type = git_get_type("$hash^{}");
7230         if (!$type) {
7231                 die_error(404, 'Object does not exist');
7232         }  elsif ($type eq 'blob') {
7233                 die_error(400, 'Object is not a tree-ish');
7234         }
7235
7236         my ($name, $prefix) = snapshot_name($project, $hash);
7237         my $filename = "$name$known_snapshot_formats{$format}{'suffix'}";
7238
7239         my %co = parse_commit($hash);
7240         exit_if_unmodified_since($co{'committer_epoch'}) if %co;
7241
7242         my $cmd = quote_command(
7243                 git_cmd(), 'archive',
7244                 "--format=$known_snapshot_formats{$format}{'format'}",
7245                 "--prefix=$prefix/", $hash);
7246         if (exists $known_snapshot_formats{$format}{'compressor'}) {
7247                 $cmd .= ' | ' . quote_command(@{$known_snapshot_formats{$format}{'compressor'}});
7248         }
7249
7250         $filename =~ s/(["\\])/\\$1/g;
7251         my %latest_date;
7252         if (%co) {
7253                 %latest_date = parse_date($co{'committer_epoch'}, $co{'committer_tz'});
7254         }
7255
7256         print $cgi->header(
7257                 -type => $known_snapshot_formats{$format}{'type'},
7258                 -content_disposition => 'inline; filename="' . $filename . '"',
7259                 %co ? (-last_modified => $latest_date{'rfc2822'}) : (),
7260                 -status => '200 OK');
7261
7262         open my $fd, "-|", $cmd
7263                 or die_error(500, "Execute git-archive failed");
7264         binmode STDOUT, ':raw';
7265         print <$fd>;
7266         binmode STDOUT, ':utf8'; # as set at the beginning of gitweb.cgi
7267         close $fd;
7268 }
7269
7270 sub git_log_generic {
7271         my ($fmt_name, $body_subr, $base, $parent, $file_name, $file_hash) = @_;
7272
7273         my $head = git_get_head_hash($project);
7274         if (!defined $base) {
7275                 $base = $head;
7276         }
7277         if (!defined $page) {
7278                 $page = 0;
7279         }
7280         my $refs = git_get_references();
7281
7282         my $commit_hash = $base;
7283         if (defined $parent) {
7284                 $commit_hash = "$parent..$base";
7285         }
7286         my @commitlist =
7287                 parse_commits($commit_hash, 101, (100 * $page),
7288                               defined $file_name ? ($file_name, "--full-history") : ());
7289
7290         my $ftype;
7291         if (!defined $file_hash && defined $file_name) {
7292                 # some commits could have deleted file in question,
7293                 # and not have it in tree, but one of them has to have it
7294                 for (my $i = 0; $i < @commitlist; $i++) {
7295                         $file_hash = git_get_hash_by_path($commitlist[$i]{'id'}, $file_name);
7296                         last if defined $file_hash;
7297                 }
7298         }
7299         if (defined $file_hash) {
7300                 $ftype = git_get_type($file_hash);
7301         }
7302         if (defined $file_name && !defined $ftype) {
7303                 die_error(500, "Unknown type of object");
7304         }
7305         my %co;
7306         if (defined $file_name) {
7307                 %co = parse_commit($base)
7308                         or die_error(404, "Unknown commit object");
7309         }
7310
7311
7312         my $paging_nav = format_paging_nav($fmt_name, $page, $#commitlist >= 100);
7313         my $next_link = '';
7314         if ($#commitlist >= 100) {
7315                 $next_link =
7316                         $cgi->a({-href => href(-replay=>1, page=>$page+1),
7317                                  -accesskey => "n", -title => "Alt-n"}, "next");
7318         }
7319         my $patch_max = gitweb_get_feature('patches');
7320         if ($patch_max && !defined $file_name) {
7321                 if ($patch_max < 0 || @commitlist <= $patch_max) {
7322                         $paging_nav .= " &sdot; " .
7323                                 $cgi->a({-href => href(action=>"patches", -replay=>1)},
7324                                         "patches");
7325                 }
7326         }
7327
7328         git_header_html();
7329         git_print_page_nav($fmt_name,'', $hash,$hash,$hash, $paging_nav);
7330         if (defined $file_name) {
7331                 git_print_header_div('commit', esc_html($co{'title'}), $base);
7332         } else {
7333                 git_print_header_div('summary', $project)
7334         }
7335         git_print_page_path($file_name, $ftype, $hash_base)
7336                 if (defined $file_name);
7337
7338         $body_subr->(\@commitlist, 0, 99, $refs, $next_link,
7339                      $file_name, $file_hash, $ftype);
7340
7341         git_footer_html();
7342 }
7343
7344 sub git_log {
7345         git_log_generic('log', \&git_log_body,
7346                         $hash, $hash_parent);
7347 }
7348
7349 sub git_commit {
7350         $hash ||= $hash_base || "HEAD";
7351         my %co = parse_commit($hash)
7352             or die_error(404, "Unknown commit object");
7353
7354         my $parent  = $co{'parent'};
7355         my $parents = $co{'parents'}; # listref
7356
7357         # we need to prepare $formats_nav before any parameter munging
7358         my $formats_nav;
7359         if (!defined $parent) {
7360                 # --root commitdiff
7361                 $formats_nav .= '(initial)';
7362         } elsif (@$parents == 1) {
7363                 # single parent commit
7364                 $formats_nav .=
7365                         '(parent: ' .
7366                         $cgi->a({-href => href(action=>"commit",
7367                                                hash=>$parent)},
7368                                 esc_html(substr($parent, 0, 7))) .
7369                         ')';
7370         } else {
7371                 # merge commit
7372                 $formats_nav .=
7373                         '(merge: ' .
7374                         join(' ', map {
7375                                 $cgi->a({-href => href(action=>"commit",
7376                                                        hash=>$_)},
7377                                         esc_html(substr($_, 0, 7)));
7378                         } @$parents ) .
7379                         ')';
7380         }
7381         if (gitweb_check_feature('patches') && @$parents <= 1) {
7382                 $formats_nav .= " | " .
7383                         $cgi->a({-href => href(action=>"patch", -replay=>1)},
7384                                 "patch");
7385         }
7386
7387         if (!defined $parent) {
7388                 $parent = "--root";
7389         }
7390         my @difftree;
7391         open my $fd, "-|", git_cmd(), "diff-tree", '-r', "--no-commit-id",
7392                 @diff_opts,
7393                 (@$parents <= 1 ? $parent : '-c'),
7394                 $hash, "--"
7395                 or die_error(500, "Open git-diff-tree failed");
7396         @difftree = map { chomp; $_ } <$fd>;
7397         close $fd or die_error(404, "Reading git-diff-tree failed");
7398
7399         # non-textual hash id's can be cached
7400         my $expires;
7401         if ($hash =~ m/^[0-9a-fA-F]{40}$/) {
7402                 $expires = "+1d";
7403         }
7404         my $refs = git_get_references();
7405         my $ref = format_ref_marker($refs, $co{'id'});
7406
7407         git_header_html(undef, $expires);
7408         git_print_page_nav('commit', '',
7409                            $hash, $co{'tree'}, $hash,
7410                            $formats_nav);
7411
7412         if (defined $co{'parent'}) {
7413                 git_print_header_div('commitdiff', esc_html($co{'title'}) . $ref, $hash);
7414         } else {
7415                 git_print_header_div('tree', esc_html($co{'title'}) . $ref, $co{'tree'}, $hash);
7416         }
7417         print "<div class=\"title_text\">\n" .
7418               "<table class=\"object_header\">\n";
7419         git_print_authorship_rows(\%co);
7420         print "<tr><td>commit</td><td class=\"sha1\">$co{'id'}</td></tr>\n";
7421         print "<tr>" .
7422               "<td>tree</td>" .
7423               "<td class=\"sha1\">" .
7424               $cgi->a({-href => href(action=>"tree", hash=>$co{'tree'}, hash_base=>$hash),
7425                        class => "list"}, $co{'tree'}) .
7426               "</td>" .
7427               "<td class=\"link\">" .
7428               $cgi->a({-href => href(action=>"tree", hash=>$co{'tree'}, hash_base=>$hash)},
7429                       "tree");
7430         my $snapshot_links = format_snapshot_links($hash);
7431         if (defined $snapshot_links) {
7432                 print " | " . $snapshot_links;
7433         }
7434         print "</td>" .
7435               "</tr>\n";
7436
7437         foreach my $par (@$parents) {
7438                 print "<tr>" .
7439                       "<td>parent</td>" .
7440                       "<td class=\"sha1\">" .
7441                       $cgi->a({-href => href(action=>"commit", hash=>$par),
7442                                class => "list"}, $par) .
7443                       "</td>" .
7444                       "<td class=\"link\">" .
7445                       $cgi->a({-href => href(action=>"commit", hash=>$par)}, "commit") .
7446                       " | " .
7447                       $cgi->a({-href => href(action=>"commitdiff", hash=>$hash, hash_parent=>$par)}, "diff") .
7448                       "</td>" .
7449                       "</tr>\n";
7450         }
7451         print "</table>".
7452               "</div>\n";
7453
7454         print "<div class=\"page_body\">\n";
7455         git_print_log($co{'comment'});
7456         print "</div>\n";
7457
7458         git_difftree_body(\@difftree, $hash, @$parents);
7459
7460         git_footer_html();
7461 }
7462
7463 sub git_object {
7464         # object is defined by:
7465         # - hash or hash_base alone
7466         # - hash_base and file_name
7467         my $type;
7468
7469         # - hash or hash_base alone
7470         if ($hash || ($hash_base && !defined $file_name)) {
7471                 my $object_id = $hash || $hash_base;
7472
7473                 open my $fd, "-|", quote_command(
7474                         git_cmd(), 'cat-file', '-t', $object_id) . ' 2> /dev/null'
7475                         or die_error(404, "Object does not exist");
7476                 $type = <$fd>;
7477                 chomp $type;
7478                 close $fd
7479                         or die_error(404, "Object does not exist");
7480
7481         # - hash_base and file_name
7482         } elsif ($hash_base && defined $file_name) {
7483                 $file_name =~ s,/+$,,;
7484
7485                 system(git_cmd(), "cat-file", '-e', $hash_base) == 0
7486                         or die_error(404, "Base object does not exist");
7487
7488                 # here errors should not hapen
7489                 open my $fd, "-|", git_cmd(), "ls-tree", $hash_base, "--", $file_name
7490                         or die_error(500, "Open git-ls-tree failed");
7491                 my $line = <$fd>;
7492                 close $fd;
7493
7494                 #'100644 blob 0fa3f3a66fb6a137f6ec2c19351ed4d807070ffa  panic.c'
7495                 unless ($line && $line =~ m/^([0-9]+) (.+) ([0-9a-fA-F]{40})\t/) {
7496                         die_error(404, "File or directory for given base does not exist");
7497                 }
7498                 $type = $2;
7499                 $hash = $3;
7500         } else {
7501                 die_error(400, "Not enough information to find object");
7502         }
7503
7504         print $cgi->redirect(-uri => href(action=>$type, -full=>1,
7505                                           hash=>$hash, hash_base=>$hash_base,
7506                                           file_name=>$file_name),
7507                              -status => '302 Found');
7508 }
7509
7510 sub git_blobdiff {
7511         my $format = shift || 'html';
7512         my $diff_style = $input_params{'diff_style'} || 'inline';
7513
7514         my $fd;
7515         my @difftree;
7516         my %diffinfo;
7517         my $expires;
7518
7519         # preparing $fd and %diffinfo for git_patchset_body
7520         # new style URI
7521         if (defined $hash_base && defined $hash_parent_base) {
7522                 if (defined $file_name) {
7523                         # read raw output
7524                         open $fd, "-|", git_cmd(), "diff-tree", '-r', @diff_opts,
7525                                 $hash_parent_base, $hash_base,
7526                                 "--", (defined $file_parent ? $file_parent : ()), $file_name
7527                                 or die_error(500, "Open git-diff-tree failed");
7528                         @difftree = map { chomp; $_ } <$fd>;
7529                         close $fd
7530                                 or die_error(404, "Reading git-diff-tree failed");
7531                         @difftree
7532                                 or die_error(404, "Blob diff not found");
7533
7534                 } elsif (defined $hash &&
7535                          $hash =~ /[0-9a-fA-F]{40}/) {
7536                         # try to find filename from $hash
7537
7538                         # read filtered raw output
7539                         open $fd, "-|", git_cmd(), "diff-tree", '-r', @diff_opts,
7540                                 $hash_parent_base, $hash_base, "--"
7541                                 or die_error(500, "Open git-diff-tree failed");
7542                         @difftree =
7543                                 # ':100644 100644 03b21826... 3b93d5e7... M     ls-files.c'
7544                                 # $hash == to_id
7545                                 grep { /^:[0-7]{6} [0-7]{6} [0-9a-fA-F]{40} $hash/ }
7546                                 map { chomp; $_ } <$fd>;
7547                         close $fd
7548                                 or die_error(404, "Reading git-diff-tree failed");
7549                         @difftree
7550                                 or die_error(404, "Blob diff not found");
7551
7552                 } else {
7553                         die_error(400, "Missing one of the blob diff parameters");
7554                 }
7555
7556                 if (@difftree > 1) {
7557                         die_error(400, "Ambiguous blob diff specification");
7558                 }
7559
7560                 %diffinfo = parse_difftree_raw_line($difftree[0]);
7561                 $file_parent ||= $diffinfo{'from_file'} || $file_name;
7562                 $file_name   ||= $diffinfo{'to_file'};
7563
7564                 $hash_parent ||= $diffinfo{'from_id'};
7565                 $hash        ||= $diffinfo{'to_id'};
7566
7567                 # non-textual hash id's can be cached
7568                 if ($hash_base =~ m/^[0-9a-fA-F]{40}$/ &&
7569                     $hash_parent_base =~ m/^[0-9a-fA-F]{40}$/) {
7570                         $expires = '+1d';
7571                 }
7572
7573                 # open patch output
7574                 open $fd, "-|", git_cmd(), "diff-tree", '-r', @diff_opts,
7575                         '-p', ($format eq 'html' ? "--full-index" : ()),
7576                         $hash_parent_base, $hash_base,
7577                         "--", (defined $file_parent ? $file_parent : ()), $file_name
7578                         or die_error(500, "Open git-diff-tree failed");
7579         }
7580
7581         # old/legacy style URI -- not generated anymore since 1.4.3.
7582         if (!%diffinfo) {
7583                 die_error('404 Not Found', "Missing one of the blob diff parameters")
7584         }
7585
7586         # header
7587         if ($format eq 'html') {
7588                 my $formats_nav =
7589                         $cgi->a({-href => href(action=>"blobdiff_plain", -replay=>1)},
7590                                 "raw");
7591                 $formats_nav .= diff_style_nav($diff_style);
7592                 git_header_html(undef, $expires);
7593                 if (defined $hash_base && (my %co = parse_commit($hash_base))) {
7594                         git_print_page_nav('','', $hash_base,$co{'tree'},$hash_base, $formats_nav);
7595                         git_print_header_div('commit', esc_html($co{'title'}), $hash_base);
7596                 } else {
7597                         print "<div class=\"page_nav\"><br/>$formats_nav<br/></div>\n";
7598                         print "<div class=\"title\">".esc_html("$hash vs $hash_parent")."</div>\n";
7599                 }
7600                 if (defined $file_name) {
7601                         git_print_page_path($file_name, "blob", $hash_base);
7602                 } else {
7603                         print "<div class=\"page_path\"></div>\n";
7604                 }
7605
7606         } elsif ($format eq 'plain') {
7607                 print $cgi->header(
7608                         -type => 'text/plain',
7609                         -charset => 'utf-8',
7610                         -expires => $expires,
7611                         -content_disposition => 'inline; filename="' . "$file_name" . '.patch"');
7612
7613                 print "X-Git-Url: " . $cgi->self_url() . "\n\n";
7614
7615         } else {
7616                 die_error(400, "Unknown blobdiff format");
7617         }
7618
7619         # patch
7620         if ($format eq 'html') {
7621                 print "<div class=\"page_body\">\n";
7622
7623                 git_patchset_body($fd, $diff_style,
7624                                   [ \%diffinfo ], $hash_base, $hash_parent_base);
7625                 close $fd;
7626
7627                 print "</div>\n"; # class="page_body"
7628                 git_footer_html();
7629
7630         } else {
7631                 while (my $line = <$fd>) {
7632                         $line =~ s!a/($hash|$hash_parent)!'a/'.esc_path($diffinfo{'from_file'})!eg;
7633                         $line =~ s!b/($hash|$hash_parent)!'b/'.esc_path($diffinfo{'to_file'})!eg;
7634
7635                         print $line;
7636
7637                         last if $line =~ m!^\+\+\+!;
7638                 }
7639                 local $/ = undef;
7640                 print <$fd>;
7641                 close $fd;
7642         }
7643 }
7644
7645 sub git_blobdiff_plain {
7646         git_blobdiff('plain');
7647 }
7648
7649 # assumes that it is added as later part of already existing navigation,
7650 # so it returns "| foo | bar" rather than just "foo | bar"
7651 sub diff_style_nav {
7652         my ($diff_style, $is_combined) = @_;
7653         $diff_style ||= 'inline';
7654
7655         return "" if ($is_combined);
7656
7657         my @styles = (inline => 'inline', 'sidebyside' => 'side by side');
7658         my %styles = @styles;
7659         @styles =
7660                 @styles[ map { $_ * 2 } 0..$#styles/2 ];
7661
7662         return join '',
7663                 map { " | ".$_ }
7664                 map {
7665                         $_ eq $diff_style ? $styles{$_} :
7666                         $cgi->a({-href => href(-replay=>1, diff_style => $_)}, $styles{$_})
7667                 } @styles;
7668 }
7669
7670 sub git_commitdiff {
7671         my %params = @_;
7672         my $format = $params{-format} || 'html';
7673         my $diff_style = $input_params{'diff_style'} || 'inline';
7674
7675         my ($patch_max) = gitweb_get_feature('patches');
7676         if ($format eq 'patch') {
7677                 die_error(403, "Patch view not allowed") unless $patch_max;
7678         }
7679
7680         $hash ||= $hash_base || "HEAD";
7681         my %co = parse_commit($hash)
7682             or die_error(404, "Unknown commit object");
7683
7684         # choose format for commitdiff for merge
7685         if (! defined $hash_parent && @{$co{'parents'}} > 1) {
7686                 $hash_parent = '--cc';
7687         }
7688         # we need to prepare $formats_nav before almost any parameter munging
7689         my $formats_nav;
7690         if ($format eq 'html') {
7691                 $formats_nav =
7692                         $cgi->a({-href => href(action=>"commitdiff_plain", -replay=>1)},
7693                                 "raw");
7694                 if ($patch_max && @{$co{'parents'}} <= 1) {
7695                         $formats_nav .= " | " .
7696                                 $cgi->a({-href => href(action=>"patch", -replay=>1)},
7697                                         "patch");
7698                 }
7699                 $formats_nav .= diff_style_nav($diff_style, @{$co{'parents'}} > 1);
7700
7701                 if (defined $hash_parent &&
7702                     $hash_parent ne '-c' && $hash_parent ne '--cc') {
7703                         # commitdiff with two commits given
7704                         my $hash_parent_short = $hash_parent;
7705                         if ($hash_parent =~ m/^[0-9a-fA-F]{40}$/) {
7706                                 $hash_parent_short = substr($hash_parent, 0, 7);
7707                         }
7708                         $formats_nav .=
7709                                 ' (from';
7710                         for (my $i = 0; $i < @{$co{'parents'}}; $i++) {
7711                                 if ($co{'parents'}[$i] eq $hash_parent) {
7712                                         $formats_nav .= ' parent ' . ($i+1);
7713                                         last;
7714                                 }
7715                         }
7716                         $formats_nav .= ': ' .
7717                                 $cgi->a({-href => href(-replay=>1,
7718                                                        hash=>$hash_parent, hash_base=>undef)},
7719                                         esc_html($hash_parent_short)) .
7720                                 ')';
7721                 } elsif (!$co{'parent'}) {
7722                         # --root commitdiff
7723                         $formats_nav .= ' (initial)';
7724                 } elsif (scalar @{$co{'parents'}} == 1) {
7725                         # single parent commit
7726                         $formats_nav .=
7727                                 ' (parent: ' .
7728                                 $cgi->a({-href => href(-replay=>1,
7729                                                        hash=>$co{'parent'}, hash_base=>undef)},
7730                                         esc_html(substr($co{'parent'}, 0, 7))) .
7731                                 ')';
7732                 } else {
7733                         # merge commit
7734                         if ($hash_parent eq '--cc') {
7735                                 $formats_nav .= ' | ' .
7736                                         $cgi->a({-href => href(-replay=>1,
7737                                                                hash=>$hash, hash_parent=>'-c')},
7738                                                 'combined');
7739                         } else { # $hash_parent eq '-c'
7740                                 $formats_nav .= ' | ' .
7741                                         $cgi->a({-href => href(-replay=>1,
7742                                                                hash=>$hash, hash_parent=>'--cc')},
7743                                                 'compact');
7744                         }
7745                         $formats_nav .=
7746                                 ' (merge: ' .
7747                                 join(' ', map {
7748                                         $cgi->a({-href => href(-replay=>1,
7749                                                                hash=>$_, hash_base=>undef)},
7750                                                 esc_html(substr($_, 0, 7)));
7751                                 } @{$co{'parents'}} ) .
7752                                 ')';
7753                 }
7754         }
7755
7756         my $hash_parent_param = $hash_parent;
7757         if (!defined $hash_parent_param) {
7758                 # --cc for multiple parents, --root for parentless
7759                 $hash_parent_param =
7760                         @{$co{'parents'}} > 1 ? '--cc' : $co{'parent'} || '--root';
7761         }
7762
7763         # read commitdiff
7764         my $fd;
7765         my @difftree;
7766         if ($format eq 'html') {
7767                 open $fd, "-|", git_cmd(), "diff-tree", '-r', @diff_opts,
7768                         "--no-commit-id", "--patch-with-raw", "--full-index",
7769                         $hash_parent_param, $hash, "--"
7770                         or die_error(500, "Open git-diff-tree failed");
7771
7772                 while (my $line = <$fd>) {
7773                         chomp $line;
7774                         # empty line ends raw part of diff-tree output
7775                         last unless $line;
7776                         push @difftree, scalar parse_difftree_raw_line($line);
7777                 }
7778
7779         } elsif ($format eq 'plain') {
7780                 open $fd, "-|", git_cmd(), "diff-tree", '-r', @diff_opts,
7781                         '-p', $hash_parent_param, $hash, "--"
7782                         or die_error(500, "Open git-diff-tree failed");
7783         } elsif ($format eq 'patch') {
7784                 # For commit ranges, we limit the output to the number of
7785                 # patches specified in the 'patches' feature.
7786                 # For single commits, we limit the output to a single patch,
7787                 # diverging from the git-format-patch default.
7788                 my @commit_spec = ();
7789                 if ($hash_parent) {
7790                         if ($patch_max > 0) {
7791                                 push @commit_spec, "-$patch_max";
7792                         }
7793                         push @commit_spec, '-n', "$hash_parent..$hash";
7794                 } else {
7795                         if ($params{-single}) {
7796                                 push @commit_spec, '-1';
7797                         } else {
7798                                 if ($patch_max > 0) {
7799                                         push @commit_spec, "-$patch_max";
7800                                 }
7801                                 push @commit_spec, "-n";
7802                         }
7803                         push @commit_spec, '--root', $hash;
7804                 }
7805                 open $fd, "-|", git_cmd(), "format-patch", @diff_opts,
7806                         '--encoding=utf8', '--stdout', @commit_spec
7807                         or die_error(500, "Open git-format-patch failed");
7808         } else {
7809                 die_error(400, "Unknown commitdiff format");
7810         }
7811
7812         # non-textual hash id's can be cached
7813         my $expires;
7814         if ($hash =~ m/^[0-9a-fA-F]{40}$/) {
7815                 $expires = "+1d";
7816         }
7817
7818         # write commit message
7819         if ($format eq 'html') {
7820                 my $refs = git_get_references();
7821                 my $ref = format_ref_marker($refs, $co{'id'});
7822
7823                 git_header_html(undef, $expires);
7824                 git_print_page_nav('commitdiff','', $hash,$co{'tree'},$hash, $formats_nav);
7825                 git_print_header_div('commit', esc_html($co{'title'}) . $ref, $hash);
7826                 print "<div class=\"title_text\">\n" .
7827                       "<table class=\"object_header\">\n";
7828                 git_print_authorship_rows(\%co);
7829                 print "</table>".
7830                       "</div>\n";
7831                 print "<div class=\"page_body\">\n";
7832                 if (@{$co{'comment'}} > 1) {
7833                         print "<div class=\"log\">\n";
7834                         git_print_log($co{'comment'}, -final_empty_line=> 1, -remove_title => 1);
7835                         print "</div>\n"; # class="log"
7836                 }
7837
7838         } elsif ($format eq 'plain') {
7839                 my $refs = git_get_references("tags");
7840                 my $tagname = git_get_rev_name_tags($hash);
7841                 my $filename = basename($project) . "-$hash.patch";
7842
7843                 print $cgi->header(
7844                         -type => 'text/plain',
7845                         -charset => 'utf-8',
7846                         -expires => $expires,
7847                         -content_disposition => 'inline; filename="' . "$filename" . '"');
7848                 my %ad = parse_date($co{'author_epoch'}, $co{'author_tz'});
7849                 print "From: " . to_utf8($co{'author'}) . "\n";
7850                 print "Date: $ad{'rfc2822'} ($ad{'tz_local'})\n";
7851                 print "Subject: " . to_utf8($co{'title'}) . "\n";
7852
7853                 print "X-Git-Tag: $tagname\n" if $tagname;
7854                 print "X-Git-Url: " . $cgi->self_url() . "\n\n";
7855
7856                 foreach my $line (@{$co{'comment'}}) {
7857                         print to_utf8($line) . "\n";
7858                 }
7859                 print "---\n\n";
7860         } elsif ($format eq 'patch') {
7861                 my $filename = basename($project) . "-$hash.patch";
7862
7863                 print $cgi->header(
7864                         -type => 'text/plain',
7865                         -charset => 'utf-8',
7866                         -expires => $expires,
7867                         -content_disposition => 'inline; filename="' . "$filename" . '"');
7868         }
7869
7870         # write patch
7871         if ($format eq 'html') {
7872                 my $use_parents = !defined $hash_parent ||
7873                         $hash_parent eq '-c' || $hash_parent eq '--cc';
7874                 git_difftree_body(\@difftree, $hash,
7875                                   $use_parents ? @{$co{'parents'}} : $hash_parent);
7876                 print "<br/>\n";
7877
7878                 git_patchset_body($fd, $diff_style,
7879                                   \@difftree, $hash,
7880                                   $use_parents ? @{$co{'parents'}} : $hash_parent);
7881                 close $fd;
7882                 print "</div>\n"; # class="page_body"
7883                 git_footer_html();
7884
7885         } elsif ($format eq 'plain') {
7886                 local $/ = undef;
7887                 print <$fd>;
7888                 close $fd
7889                         or print "Reading git-diff-tree failed\n";
7890         } elsif ($format eq 'patch') {
7891                 local $/ = undef;
7892                 print <$fd>;
7893                 close $fd
7894                         or print "Reading git-format-patch failed\n";
7895         }
7896 }
7897
7898 sub git_commitdiff_plain {
7899         git_commitdiff(-format => 'plain');
7900 }
7901
7902 # format-patch-style patches
7903 sub git_patch {
7904         git_commitdiff(-format => 'patch', -single => 1);
7905 }
7906
7907 sub git_patches {
7908         git_commitdiff(-format => 'patch');
7909 }
7910
7911 sub git_history {
7912         git_log_generic('history', \&git_history_body,
7913                         $hash_base, $hash_parent_base,
7914                         $file_name, $hash);
7915 }
7916
7917 sub git_search {
7918         $searchtype ||= 'commit';
7919
7920         # check if appropriate features are enabled
7921         gitweb_check_feature('search')
7922                 or die_error(403, "Search is disabled");
7923         if ($searchtype eq 'pickaxe') {
7924                 # pickaxe may take all resources of your box and run for several minutes
7925                 # with every query - so decide by yourself how public you make this feature
7926                 gitweb_check_feature('pickaxe')
7927                         or die_error(403, "Pickaxe search is disabled");
7928         }
7929         if ($searchtype eq 'grep') {
7930                 # grep search might be potentially CPU-intensive, too
7931                 gitweb_check_feature('grep')
7932                         or die_error(403, "Grep search is disabled");
7933         }
7934
7935         if (!defined $searchtext) {
7936                 die_error(400, "Text field is empty");
7937         }
7938         if (!defined $hash) {
7939                 $hash = git_get_head_hash($project);
7940         }
7941         my %co = parse_commit($hash);
7942         if (!%co) {
7943                 die_error(404, "Unknown commit object");
7944         }
7945         if (!defined $page) {
7946                 $page = 0;
7947         }
7948
7949         if ($searchtype eq 'commit' ||
7950             $searchtype eq 'author' ||
7951             $searchtype eq 'committer') {
7952                 git_search_message(%co);
7953         } elsif ($searchtype eq 'pickaxe') {
7954                 git_search_changes(%co);
7955         } elsif ($searchtype eq 'grep') {
7956                 git_search_files(%co);
7957         } else {
7958                 die_error(400, "Unknown search type");
7959         }
7960 }
7961
7962 sub git_search_help {
7963         git_header_html();
7964         git_print_page_nav('','', $hash,$hash,$hash);
7965         print <<EOT;
7966 <p><strong>Pattern</strong> is by default a normal string that is matched precisely (but without
7967 regard to case, except in the case of pickaxe). However, when you check the <em>re</em> checkbox,
7968 the pattern entered is recognized as the POSIX extended
7969 <a href="http://en.wikipedia.org/wiki/Regular_expression">regular expression</a> (also case
7970 insensitive).</p>
7971 <dl>
7972 <dt><b>commit</b></dt>
7973 <dd>The commit messages and authorship information will be scanned for the given pattern.</dd>
7974 EOT
7975         my $have_grep = gitweb_check_feature('grep');
7976         if ($have_grep) {
7977                 print <<EOT;
7978 <dt><b>grep</b></dt>
7979 <dd>All files in the currently selected tree (HEAD unless you are explicitly browsing
7980     a different one) are searched for the given pattern. On large trees, this search can take
7981 a while and put some strain on the server, so please use it with some consideration. Note that
7982 due to git-grep peculiarity, currently if regexp mode is turned off, the matches are
7983 case-sensitive.</dd>
7984 EOT
7985         }
7986         print <<EOT;
7987 <dt><b>author</b></dt>
7988 <dd>Name and e-mail of the change author and date of birth of the patch will be scanned for the given pattern.</dd>
7989 <dt><b>committer</b></dt>
7990 <dd>Name and e-mail of the committer and date of commit will be scanned for the given pattern.</dd>
7991 EOT
7992         my $have_pickaxe = gitweb_check_feature('pickaxe');
7993         if ($have_pickaxe) {
7994                 print <<EOT;
7995 <dt><b>pickaxe</b></dt>
7996 <dd>All commits that caused the string to appear or disappear from any file (changes that
7997 added, removed or "modified" the string) will be listed. This search can take a while and
7998 takes a lot of strain on the server, so please use it wisely. Note that since you may be
7999 interested even in changes just changing the case as well, this search is case sensitive.</dd>
8000 EOT
8001         }
8002         print "</dl>\n";
8003         git_footer_html();
8004 }
8005
8006 sub git_shortlog {
8007         git_log_generic('shortlog', \&git_shortlog_body,
8008                         $hash, $hash_parent);
8009 }
8010
8011 ## ......................................................................
8012 ## feeds (RSS, Atom; OPML)
8013
8014 sub git_feed {
8015         my $format = shift || 'atom';
8016         my $have_blame = gitweb_check_feature('blame');
8017
8018         # Atom: http://www.atomenabled.org/developers/syndication/
8019         # RSS:  http://www.notestips.com/80256B3A007F2692/1/NAMO5P9UPQ
8020         if ($format ne 'rss' && $format ne 'atom') {
8021                 die_error(400, "Unknown web feed format");
8022         }
8023
8024         # log/feed of current (HEAD) branch, log of given branch, history of file/directory
8025         my $head = $hash || 'HEAD';
8026         my @commitlist = parse_commits($head, 150, 0, $file_name);
8027
8028         my %latest_commit;
8029         my %latest_date;
8030         my $content_type = "application/$format+xml";
8031         if (defined $cgi->http('HTTP_ACCEPT') &&
8032                  $cgi->Accept('text/xml') > $cgi->Accept($content_type)) {
8033                 # browser (feed reader) prefers text/xml
8034                 $content_type = 'text/xml';
8035         }
8036         if (defined($commitlist[0])) {
8037                 %latest_commit = %{$commitlist[0]};
8038                 my $latest_epoch = $latest_commit{'committer_epoch'};
8039                 exit_if_unmodified_since($latest_epoch);
8040                 %latest_date = parse_date($latest_epoch, $latest_commit{'committer_tz'});
8041         }
8042         print $cgi->header(
8043                 -type => $content_type,
8044                 -charset => 'utf-8',
8045                 %latest_date ? (-last_modified => $latest_date{'rfc2822'}) : (),
8046                 -status => '200 OK');
8047
8048         # Optimization: skip generating the body if client asks only
8049         # for Last-Modified date.
8050         return if ($cgi->request_method() eq 'HEAD');
8051
8052         # header variables
8053         my $title = "$site_name - $project/$action";
8054         my $feed_type = 'log';
8055         if (defined $hash) {
8056                 $title .= " - '$hash'";
8057                 $feed_type = 'branch log';
8058                 if (defined $file_name) {
8059                         $title .= " :: $file_name";
8060                         $feed_type = 'history';
8061                 }
8062         } elsif (defined $file_name) {
8063                 $title .= " - $file_name";
8064                 $feed_type = 'history';
8065         }
8066         $title .= " $feed_type";
8067         $title = esc_html($title);
8068         my $descr = git_get_project_description($project);
8069         if (defined $descr) {
8070                 $descr = esc_html($descr);
8071         } else {
8072                 $descr = "$project " .
8073                          ($format eq 'rss' ? 'RSS' : 'Atom') .
8074                          " feed";
8075         }
8076         my $owner = git_get_project_owner($project);
8077         $owner = esc_html($owner);
8078
8079         #header
8080         my $alt_url;
8081         if (defined $file_name) {
8082                 $alt_url = href(-full=>1, action=>"history", hash=>$hash, file_name=>$file_name);
8083         } elsif (defined $hash) {
8084                 $alt_url = href(-full=>1, action=>"log", hash=>$hash);
8085         } else {
8086                 $alt_url = href(-full=>1, action=>"summary");
8087         }
8088         print qq!<?xml version="1.0" encoding="utf-8"?>\n!;
8089         if ($format eq 'rss') {
8090                 print <<XML;
8091 <rss version="2.0" xmlns:content="http://purl.org/rss/1.0/modules/content/">
8092 <channel>
8093 XML
8094                 print "<title>$title</title>\n" .
8095                       "<link>$alt_url</link>\n" .
8096                       "<description>$descr</description>\n" .
8097                       "<language>en</language>\n" .
8098                       # project owner is responsible for 'editorial' content
8099                       "<managingEditor>$owner</managingEditor>\n";
8100                 if (defined $logo || defined $favicon) {
8101                         # prefer the logo to the favicon, since RSS
8102                         # doesn't allow both
8103                         my $img = esc_url($logo || $favicon);
8104                         print "<image>\n" .
8105                               "<url>$img</url>\n" .
8106                               "<title>$title</title>\n" .
8107                               "<link>$alt_url</link>\n" .
8108                               "</image>\n";
8109                 }
8110                 if (%latest_date) {
8111                         print "<pubDate>$latest_date{'rfc2822'}</pubDate>\n";
8112                         print "<lastBuildDate>$latest_date{'rfc2822'}</lastBuildDate>\n";
8113                 }
8114                 print "<generator>gitweb v.$version/$git_version</generator>\n";
8115         } elsif ($format eq 'atom') {
8116                 print <<XML;
8117 <feed xmlns="http://www.w3.org/2005/Atom">
8118 XML
8119                 print "<title>$title</title>\n" .
8120                       "<subtitle>$descr</subtitle>\n" .
8121                       '<link rel="alternate" type="text/html" href="' .
8122                       $alt_url . '" />' . "\n" .
8123                       '<link rel="self" type="' . $content_type . '" href="' .
8124                       $cgi->self_url() . '" />' . "\n" .
8125                       "<id>" . href(-full=>1) . "</id>\n" .
8126                       # use project owner for feed author
8127                       "<author><name>$owner</name></author>\n";
8128                 if (defined $favicon) {
8129                         print "<icon>" . esc_url($favicon) . "</icon>\n";
8130                 }
8131                 if (defined $logo) {
8132                         # not twice as wide as tall: 72 x 27 pixels
8133                         print "<logo>" . esc_url($logo) . "</logo>\n";
8134                 }
8135                 if (! %latest_date) {
8136                         # dummy date to keep the feed valid until commits trickle in:
8137                         print "<updated>1970-01-01T00:00:00Z</updated>\n";
8138                 } else {
8139                         print "<updated>$latest_date{'iso-8601'}</updated>\n";
8140                 }
8141                 print "<generator version='$version/$git_version'>gitweb</generator>\n";
8142         }
8143
8144         # contents
8145         for (my $i = 0; $i <= $#commitlist; $i++) {
8146                 my %co = %{$commitlist[$i]};
8147                 my $commit = $co{'id'};
8148                 # we read 150, we always show 30 and the ones more recent than 48 hours
8149                 if (($i >= 20) && ((time - $co{'author_epoch'}) > 48*60*60)) {
8150                         last;
8151                 }
8152                 my %cd = parse_date($co{'author_epoch'}, $co{'author_tz'});
8153
8154                 # get list of changed files
8155                 open my $fd, "-|", git_cmd(), "diff-tree", '-r', @diff_opts,
8156                         $co{'parent'} || "--root",
8157                         $co{'id'}, "--", (defined $file_name ? $file_name : ())
8158                         or next;
8159                 my @difftree = map { chomp; $_ } <$fd>;
8160                 close $fd
8161                         or next;
8162
8163                 # print element (entry, item)
8164                 my $co_url = href(-full=>1, action=>"commitdiff", hash=>$commit);
8165                 if ($format eq 'rss') {
8166                         print "<item>\n" .
8167                               "<title>" . esc_html($co{'title'}) . "</title>\n" .
8168                               "<author>" . esc_html($co{'author'}) . "</author>\n" .
8169                               "<pubDate>$cd{'rfc2822'}</pubDate>\n" .
8170                               "<guid isPermaLink=\"true\">$co_url</guid>\n" .
8171                               "<link>$co_url</link>\n" .
8172                               "<description>" . esc_html($co{'title'}) . "</description>\n" .
8173                               "<content:encoded>" .
8174                               "<![CDATA[\n";
8175                 } elsif ($format eq 'atom') {
8176                         print "<entry>\n" .
8177                               "<title type=\"html\">" . esc_html($co{'title'}) . "</title>\n" .
8178                               "<updated>$cd{'iso-8601'}</updated>\n" .
8179                               "<author>\n" .
8180                               "  <name>" . esc_html($co{'author_name'}) . "</name>\n";
8181                         if ($co{'author_email'}) {
8182                                 print "  <email>" . esc_html($co{'author_email'}) . "</email>\n";
8183                         }
8184                         print "</author>\n" .
8185                               # use committer for contributor
8186                               "<contributor>\n" .
8187                               "  <name>" . esc_html($co{'committer_name'}) . "</name>\n";
8188                         if ($co{'committer_email'}) {
8189                                 print "  <email>" . esc_html($co{'committer_email'}) . "</email>\n";
8190                         }
8191                         print "</contributor>\n" .
8192                               "<published>$cd{'iso-8601'}</published>\n" .
8193                               "<link rel=\"alternate\" type=\"text/html\" href=\"$co_url\" />\n" .
8194                               "<id>$co_url</id>\n" .
8195                               "<content type=\"xhtml\" xml:base=\"" . esc_url($my_url) . "\">\n" .
8196                               "<div xmlns=\"http://www.w3.org/1999/xhtml\">\n";
8197                 }
8198                 my $comment = $co{'comment'};
8199                 print "<pre>\n";
8200                 foreach my $line (@$comment) {
8201                         $line = esc_html($line);
8202                         print "$line\n";
8203                 }
8204                 print "</pre><ul>\n";
8205                 foreach my $difftree_line (@difftree) {
8206                         my %difftree = parse_difftree_raw_line($difftree_line);
8207                         next if !$difftree{'from_id'};
8208
8209                         my $file = $difftree{'file'} || $difftree{'to_file'};
8210
8211                         print "<li>" .
8212                               "[" .
8213                               $cgi->a({-href => href(-full=>1, action=>"blobdiff",
8214                                                      hash=>$difftree{'to_id'}, hash_parent=>$difftree{'from_id'},
8215                                                      hash_base=>$co{'id'}, hash_parent_base=>$co{'parent'},
8216                                                      file_name=>$file, file_parent=>$difftree{'from_file'}),
8217                                       -title => "diff"}, 'D');
8218                         if ($have_blame) {
8219                                 print $cgi->a({-href => href(-full=>1, action=>"blame",
8220                                                              file_name=>$file, hash_base=>$commit),
8221                                               -title => "blame"}, 'B');
8222                         }
8223                         # if this is not a feed of a file history
8224                         if (!defined $file_name || $file_name ne $file) {
8225                                 print $cgi->a({-href => href(-full=>1, action=>"history",
8226                                                              file_name=>$file, hash=>$commit),
8227                                               -title => "history"}, 'H');
8228                         }
8229                         $file = esc_path($file);
8230                         print "] ".
8231                               "$file</li>\n";
8232                 }
8233                 if ($format eq 'rss') {
8234                         print "</ul>]]>\n" .
8235                               "</content:encoded>\n" .
8236                               "</item>\n";
8237                 } elsif ($format eq 'atom') {
8238                         print "</ul>\n</div>\n" .
8239                               "</content>\n" .
8240                               "</entry>\n";
8241                 }
8242         }
8243
8244         # end of feed
8245         if ($format eq 'rss') {
8246                 print "</channel>\n</rss>\n";
8247         } elsif ($format eq 'atom') {
8248                 print "</feed>\n";
8249         }
8250 }
8251
8252 sub git_rss {
8253         git_feed('rss');
8254 }
8255
8256 sub git_atom {
8257         git_feed('atom');
8258 }
8259
8260 sub git_opml {
8261         my @list = git_get_projects_list($project_filter, $strict_export);
8262         if (!@list) {
8263                 die_error(404, "No projects found");
8264         }
8265
8266         print $cgi->header(
8267                 -type => 'text/xml',
8268                 -charset => 'utf-8',
8269                 -content_disposition => 'inline; filename="opml.xml"');
8270
8271         my $title = esc_html($site_name);
8272         my $filter = " within subdirectory ";
8273         if (defined $project_filter) {
8274                 $filter .= esc_html($project_filter);
8275         } else {
8276                 $filter = "";
8277         }
8278         print <<XML;
8279 <?xml version="1.0" encoding="utf-8"?>
8280 <opml version="1.0">
8281 <head>
8282   <title>$title OPML Export$filter</title>
8283 </head>
8284 <body>
8285 <outline text="git RSS feeds">
8286 XML
8287
8288         foreach my $pr (@list) {
8289                 my %proj = %$pr;
8290                 my $head = git_get_head_hash($proj{'path'});
8291                 if (!defined $head) {
8292                         next;
8293                 }
8294                 $git_dir = "$projectroot/$proj{'path'}";
8295                 my %co = parse_commit($head);
8296                 if (!%co) {
8297                         next;
8298                 }
8299
8300                 my $path = esc_html(chop_str($proj{'path'}, 25, 5));
8301                 my $rss  = href('project' => $proj{'path'}, 'action' => 'rss', -full => 1);
8302                 my $html = href('project' => $proj{'path'}, 'action' => 'summary', -full => 1);
8303                 print "<outline type=\"rss\" text=\"$path\" title=\"$path\" xmlUrl=\"$rss\" htmlUrl=\"$html\"/>\n";
8304         }
8305         print <<XML;
8306 </outline>
8307 </body>
8308 </opml>
8309 XML
8310 }