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

   1 #!/usr/bin/perl
   2
   3 # gitweb - simple web interface to track changes in git repositories
   4 #
   5 # (C) 2005-2006, Kay Sievers <kay.sievers@vrfy.org>
   6 # (C) 2005, Christian Gierke
   7 #
   8 # This program is licensed under the GPLv2
   9
  10 use 5.008;
  11 use strict;
  12 use warnings;
  13 use CGI qw(:standard :escapeHTML -nosticky);
  14 use CGI::Util qw(unescape);
  15 use CGI::Carp qw(fatalsToBrowser set_message);
  16 use Encode;
  17 use Fcntl ':mode';
  18 use File::Find qw();
  19 use File::Basename qw(basename);
  20 use Time::HiRes qw(gettimeofday tv_interval);
  21 binmode STDOUT, ':utf8';
  22
  23 our $t0 = [ gettimeofday() ];
  24 our $number_of_git_cmds = 0;
  25
  26 BEGIN {
  27         CGI->compile() if $ENV{'MOD_PERL'};
  28 }
  29
  30 our $version = "++GIT_VERSION++";
  31
  32 our ($my_url, $my_uri, $base_url, $path_info, $home_link);
  33 sub evaluate_uri {
  34         our $cgi;
  35
  36         our $my_url = $cgi->url();
  37         our $my_uri = $cgi->url(-absolute => 1);
  38
  39         # Base URL for relative URLs in gitweb ($logo, $favicon, ...),
  40         # needed and used only for URLs with nonempty PATH_INFO
  41         our $base_url = $my_url;
  42
  43         # When the script is used as DirectoryIndex, the URL does not contain the name
  44         # of the script file itself, and $cgi->url() fails to strip PATH_INFO, so we
  45         # have to do it ourselves. We make $path_info global because it's also used
  46         # later on.
  47         #
  48         # Another issue with the script being the DirectoryIndex is that the resulting
  49         # $my_url data is not the full script URL: this is good, because we want
  50         # generated links to keep implying the script name if it wasn't explicitly
  51         # indicated in the URL we're handling, but it means that $my_url cannot be used
  52         # as base URL.
  53         # Therefore, if we needed to strip PATH_INFO, then we know that we have
  54         # to build the base URL ourselves:
  55         our $path_info = decode_utf8($ENV{"PATH_INFO"});
  56         if ($path_info) {
  57                 # $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
 107 # URI of GIT logo (72x27 size)
 108 our $logo = "++GITWEB_LOGO++";
 109 # URI of GIT favicon, assumed to be image/png type
 110 our $favicon = "++GITWEB_FAVICON++";
 111 # URI of gitweb.js (JavaScript code for gitweb)
 112 our $javascript = "++GITWEB_JS++";
 113
 114 # URI and label (title) of GIT logo link
 115 #our $logo_url = "http://www.kernel.org/pub/software/scm/git/docs/";
 116 #our $logo_label = "git documentation";
 117 our $logo_url = "http://git-scm.com/";
 118 our $logo_label = "git homepage";
 119
 120 # source of projects list
 121 our $projects_list = "++GITWEB_LIST++";
 122
 123 # the width (in characters) of the projects list "Description" column
 124 our $projects_list_description_width = 25;
 125
 126 # group projects by category on the projects list
 127 # (enabled if this variable evaluates to true)
 128 our $projects_list_group_categories = 0;
 129
 130 # default category if none specified
 131 # (leave the empty string for no category)
 132 our $project_list_default_category = "";
 133
 134 # default order of projects list
 135 # valid values are none, project, descr, owner, and age
 136 our $default_projects_order = "project";
 137
 138 # show repository only if this file exists
 139 # (only effective if this variable evaluates to true)
 140 our $export_ok = "++GITWEB_EXPORT_OK++";
 141
 142 # don't generate age column on the projects list page
 143 our $omit_age_column = 0;
 144
 145 # don't generate information about owners of repositories
 146 our $omit_owner=0;
 147
 148 # show repository only if this subroutine returns true
 149 # when given the path to the project, for example:
 150 #    sub { return -e "$_[0]/git-daemon-export-ok"; }
 151 our $export_auth_hook = undef;
 152
 153 # only allow viewing of repositories also shown on the overview page
 154 our $strict_export = "++GITWEB_STRICT_EXPORT++";
 155
 156 # list of git base URLs used for URL to where fetch project from,
 157 # i.e. full URL is "$git_base_url/$project"
 158 our @git_base_url_list = grep { $_ ne '' } ("++GITWEB_BASE_URL++");
 159
 160 # default blob_plain mimetype and default charset for text/plain blob
 161 our $default_blob_plain_mimetype = 'text/plain';
 162 our $default_text_plain_charset  = undef;
 163
 164 # file to use for guessing MIME types before trying /etc/mime.types
 165 # (relative to the current git repository)
 166 our $mimetypes_file = undef;
 167
 168 # assume this charset if line contains non-UTF-8 characters;
 169 # it should be valid encoding (see Encoding::Supported(3pm) for list),
 170 # for which encoding all byte sequences are valid, for example
 171 # 'iso-8859-1' aka 'latin1' (it is decoded without checking, so it
 172 # could be even 'utf-8' for the old behavior)
 173 our $fallback_encoding = 'latin1';
 174
 175 # rename detection options for git-diff and git-diff-tree
 176 # - default is '-M', with the cost proportional to
 177 #   (number of removed files) * (number of new files).
 178 # - more costly is '-C' (which implies '-M'), with the cost proportional to
 179 #   (number of changed files + number of removed files) * (number of new files)
 180 # - even more costly is '-C', '--find-copies-harder' with cost
 181 #   (number of files in the original tree) * (number of new files)
 182 # - one might want to include '-B' option, e.g. '-B', '-M'
 183 our @diff_opts = ('-M'); # taken from git_commit
 184
 185 # Disables features that would allow repository owners to inject script into
 186 # the gitweb domain.
 187 our $prevent_xss = 0;
 188
 189 # Path to the highlight executable to use (must be the one from
 190 # http://www.andre-simon.de due to assumptions about parameters and output).
 191 # Useful if highlight is not installed on your webserver's PATH.
 192 # [Default: highlight]
 193 our $highlight_bin = "++HIGHLIGHT_BIN++";
 194
 195 # information about snapshot formats that gitweb is capable of serving
 196 our %known_snapshot_formats = (
 197         # name => {
 198         #       'display' => display name,
 199         #       'type' => mime type,
 200         #       'suffix' => filename suffix,
 201         #       'format' => --format for git-archive,
 202         #       'compressor' => [compressor command and arguments]
 203         #                       (array reference, optional)
 204         #       'disabled' => boolean (optional)}
 205         #
 206         'tgz' => {
 207                 'display' => 'tar.gz',
 208                 'type' => 'application/x-gzip',
 209                 'suffix' => '.tar.gz',
 210                 'format' => 'tar',
 211                 'compressor' => ['gzip', '-n']},
 212
 213         'tbz2' => {
 214                 'display' => 'tar.bz2',
 215                 'type' => 'application/x-bzip2',
 216                 'suffix' => '.tar.bz2',
 217                 'format' => 'tar',
 218                 'compressor' => ['bzip2']},
 219
 220         'txz' => {
 221                 'display' => 'tar.xz',
 222                 'type' => 'application/x-xz',
 223                 'suffix' => '.tar.xz',
 224                 'format' => 'tar',
 225                 'compressor' => ['xz'],
 226                 'disabled' => 1},
 227
 228         'zip' => {
 229                 'display' => 'zip',
 230                 'type' => 'application/x-zip',
 231                 'suffix' => '.zip',
 232                 'format' => 'zip'},
 233 );
 234
 235 # Aliases so we understand old gitweb.snapshot values in repository
 236 # configuration.
 237 our %known_snapshot_format_aliases = (
 238         'gzip'  => 'tgz',
 239         'bzip2' => 'tbz2',
 240         'xz'    => 'txz',
 241
 242         # backward compatibility: legacy gitweb config support
 243         'x-gzip' => undef, 'gz' => undef,
 244         'x-bzip2' => undef, 'bz2' => undef,
 245         'x-zip' => undef, '' => undef,
 246 );
 247
 248 # Pixel sizes for icons and avatars. If the default font sizes or lineheights
 249 # are changed, it may be appropriate to change these values too via
 250 # $GITWEB_CONFIG.
 251 our %avatar_size = (
 252         'default' => 16,
 253         'double'  => 32
 254 );
 255
 256 # Used to set the maximum load that we will still respond to gitweb queries.
 257 # If server load exceed this value then return "503 server busy" error.
 258 # If gitweb cannot determined server load, it is taken to be 0.
 259 # Leave it undefined (or set to 'undef') to turn off load checking.
 260 our $maxload = 300;
 261
 262 # configuration for 'highlight' (http://www.andre-simon.de/)
 263 # match by basename
 264 our %highlight_basename = (
 265         #'Program' => 'py',
 266         #'Library' => 'py',
 267         'SConstruct' => 'py', # SCons equivalent of Makefile
 268         'Makefile' => 'make',
 269 );
 270 # match by extension
 271 our %highlight_ext = (
 272         # main extensions, defining name of syntax;
 273         # see files in /usr/share/highlight/langDefs/ directory
 274         (map { $_ => $_ } qw(py rb java css js tex bib xml awk bat ini spec tcl sql)),
 275         # alternate extensions, see /etc/highlight/filetypes.conf
 276         (map { $_ => 'c'   } qw(c h)),
 277         (map { $_ => 'sh'  } qw(sh bash zsh ksh)),
 278         (map { $_ => 'cpp' } qw(cpp cxx c++ cc)),
 279         (map { $_ => 'php' } qw(php php3 php4 php5 phps)),
 280         (map { $_ => 'pl'  } qw(pl perl pm)), # perhaps also 'cgi'
 281         (map { $_ => 'make'} qw(make mak mk)),
 282         (map { $_ => 'xml' } qw(xml xhtml html htm)),
 283 );
 284
 285 # You define site-wide feature defaults here; override them with
 286 # $GITWEB_CONFIG as necessary.
 287 our %feature = (
 288         # feature => {
 289         #       'sub' => feature-sub (subroutine),
 290         #       'override' => allow-override (boolean),
 291         #       'default' => [ default options...] (array reference)}
 292         #
 293         # if feature is overridable (it means that allow-override has true value),
 294         # then feature-sub will be called with default options as parameters;
 295         # return value of feature-sub indicates if to enable specified feature
 296         #
 297         # if there is no 'sub' key (no feature-sub), then feature cannot be
 298         # overridden
 299         #
 300         # use gitweb_get_feature(<feature>) to retrieve the <feature> value
 301         # (an array) or gitweb_check_feature(<feature>) to check if <feature>
 302         # is enabled
 303
 304         # Enable the 'blame' blob view, showing the last commit that modified
 305         # each line in the file. This can be very CPU-intensive.
 306
 307         # To enable system wide have in $GITWEB_CONFIG
 308         # $feature{'blame'}{'default'} = [1];
 309         # To have project specific config enable override in $GITWEB_CONFIG
 310         # $feature{'blame'}{'override'} = 1;
 311         # and in project config gitweb.blame = 0|1;
 312         'blame' => {
 313                 'sub' => sub { feature_bool('blame', @_) },
 314                 'override' => 0,
 315                 'default' => [0]},
 316
 317         # Enable the 'snapshot' link, providing a compressed archive of any
 318         # tree. This can potentially generate high traffic if you have large
 319         # project.
 320
 321         # Value is a list of formats defined in %known_snapshot_formats that
 322         # you wish to offer.
 323         # To disable system wide have in $GITWEB_CONFIG
 324         # $feature{'snapshot'}{'default'} = [];
 325         # To have project specific config enable override in $GITWEB_CONFIG
 326         # $feature{'snapshot'}{'override'} = 1;
 327         # and in project config, a comma-separated list of formats or "none"
 328         # to disable.  Example: gitweb.snapshot = tbz2,zip;
 329         'snapshot' => {
 330                 'sub' => \&feature_snapshot,
 331                 'override' => 0,
 332                 'default' => ['tgz']},
 333
 334         # Enable text search, which will list the commits which match author,
 335         # committer or commit text to a given string.  Enabled by default.
 336         # Project specific override is not supported.
 337         #
 338         # Note that this controls all search features, which means that if
 339         # it is disabled, then 'grep' and 'pickaxe' search would also be
 340         # disabled.
 341         'search' => {
 342                 'override' => 0,
 343                 'default' => [1]},
 344
 345         # Enable grep search, which will list the files in currently selected
 346         # tree containing the given string. Enabled by default. This can be
 347         # potentially CPU-intensive, of course.
 348         # Note that you need to have 'search' feature enabled too.
 349
 350         # To enable system wide have in $GITWEB_CONFIG
 351         # $feature{'grep'}{'default'} = [1];
 352         # To have project specific config enable override in $GITWEB_CONFIG
 353         # $feature{'grep'}{'override'} = 1;
 354         # and in project config gitweb.grep = 0|1;
 355         'grep' => {
 356                 'sub' => sub { feature_bool('grep', @_) },
 357                 'override' => 0,
 358                 'default' => [1]},
 359
 360         # Enable the pickaxe search, which will list the commits that modified
 361         # a given string in a file. This can be practical and quite faster
 362         # alternative to 'blame', but still potentially CPU-intensive.
 363         # Note that you need to have 'search' feature enabled too.
 364
 365         # To enable system wide have in $GITWEB_CONFIG
 366         # $feature{'pickaxe'}{'default'} = [1];
 367         # To have project specific config enable override in $GITWEB_CONFIG
 368         # $feature{'pickaxe'}{'override'} = 1;
 369         # and in project config gitweb.pickaxe = 0|1;
 370         'pickaxe' => {
 371                 'sub' => sub { feature_bool('pickaxe', @_) },
 372                 'override' => 0,
 373                 'default' => [1]},
 374
 375         # Enable showing size of blobs in a 'tree' view, in a separate
 376         # column, similar to what 'ls -l' does.  This cost a bit of IO.
 377
 378         # To disable system wide have in $GITWEB_CONFIG
 379         # $feature{'show-sizes'}{'default'} = [0];
 380         # To have project specific config enable override in $GITWEB_CONFIG
 381         # $feature{'show-sizes'}{'override'} = 1;
 382         # and in project config gitweb.showsizes = 0|1;
 383         'show-sizes' => {
 384                 'sub' => sub { feature_bool('showsizes', @_) },
 385                 'override' => 0,
 386                 'default' => [1]},
 387
 388         # Make gitweb use an alternative format of the URLs which can be
 389         # more readable and natural-looking: project name is embedded
 390         # directly in the path and the query string contains other
 391         # auxiliary information. All gitweb installations recognize
 392         # URL in either format; this configures in which formats gitweb
 393         # generates links.
 394
 395         # To enable system wide have in $GITWEB_CONFIG
 396         # $feature{'pathinfo'}{'default'} = [1];
 397         # Project specific override is not supported.
 398
 399         # Note that you will need to change the default location of CSS,
 400         # favicon, logo and possibly other files to an absolute URL. Also,
 401         # if gitweb.cgi serves as your indexfile, you will need to force
 402         # $my_uri to contain the script name in your $GITWEB_CONFIG.
 403         'pathinfo' => {
 404                 'override' => 0,
 405                 'default' => [0]},
 406
 407         # Make gitweb consider projects in project root subdirectories
 408         # to be forks of existing projects. Given project $projname.git,
 409         # projects matching $projname/*.git will not be shown in the main
 410         # projects list, instead a '+' mark will be added to $projname
 411         # there and a 'forks' view will be enabled for the project, listing
 412         # all the forks. If project list is taken from a file, forks have
 413         # to be listed after the main project.
 414
 415         # To enable system wide have in $GITWEB_CONFIG
 416         # $feature{'forks'}{'default'} = [1];
 417         # Project specific override is not supported.
 418         'forks' => {
 419                 'override' => 0,
 420                 'default' => [0]},
 421
 422         # Insert custom links to the action bar of all project pages.
 423         # This enables you mainly to link to third-party scripts integrating
 424         # into gitweb; e.g. git-browser for graphical history representation
 425         # or custom web-based repository administration interface.
 426
 427         # The 'default' value consists of a list of triplets in the form
 428         # (label, link, position) where position is the label after which
 429         # to insert the link and link is a format string where %n expands
 430         # to the project name, %f to the project path within the filesystem,
 431         # %h to the current hash (h gitweb parameter) and %b to the current
 432         # hash base (hb gitweb parameter); %% expands to %.
 433
 434         # To enable system wide have in $GITWEB_CONFIG e.g.
 435         # $feature{'actions'}{'default'} = [('graphiclog',
 436         #       '/git-browser/by-commit.html?r=%n', 'summary')];
 437         # Project specific override is not supported.
 438         'actions' => {
 439                 'override' => 0,
 440                 'default' => []},
 441
 442         # Allow gitweb scan project content tags of project repository,
 443         # and display the popular Web 2.0-ish "tag cloud" near the projects
 444         # list.  Note that this is something COMPLETELY different from the
 445         # normal Git tags.
 446
 447         # gitweb by itself can show existing tags, but it does not handle
 448         # tagging itself; you need to do it externally, outside gitweb.
 449         # The format is described in git_get_project_ctags() subroutine.
 450         # You may want to install the HTML::TagCloud Perl module to get
 451         # a pretty tag cloud instead of just a list of tags.
 452
 453         # To enable system wide have in $GITWEB_CONFIG
 454         # $feature{'ctags'}{'default'} = [1];
 455         # Project specific override is not supported.
 456
 457         # In the future whether ctags editing is enabled might depend
 458         # on the value, but using 1 should always mean no editing of ctags.
 459         'ctags' => {
 460                 'override' => 0,
 461                 'default' => [0]},
 462
 463         # The maximum number of patches in a patchset generated in patch
 464         # view. Set this to 0 or undef to disable patch view, or to a
 465         # negative number to remove any limit.
 466
 467         # To disable system wide have in $GITWEB_CONFIG
 468         # $feature{'patches'}{'default'} = [0];
 469         # To have project specific config enable override in $GITWEB_CONFIG
 470         # $feature{'patches'}{'override'} = 1;
 471         # and in project config gitweb.patches = 0|n;
 472         # where n is the maximum number of patches allowed in a patchset.
 473         'patches' => {
 474                 'sub' => \&feature_patches,
 475                 'override' => 0,
 476                 'default' => [16]},
 477
 478         # Avatar support. When this feature is enabled, views such as
 479         # shortlog or commit will display an avatar associated with
 480         # the email of the committer(s) and/or author(s).
 481
 482         # Currently available providers are gravatar and picon.
 483         # If an unknown provider is specified, the feature is disabled.
 484
 485         # Gravatar depends on Digest::MD5.
 486         # Picon currently relies on the indiana.edu database.
 487
 488         # To enable system wide have in $GITWEB_CONFIG
 489         # $feature{'avatar'}{'default'} = ['<provider>'];
 490         # where <provider> is either gravatar or picon.
 491         # To have project specific config enable override in $GITWEB_CONFIG
 492         # $feature{'avatar'}{'override'} = 1;
 493         # and in project config gitweb.avatar = <provider>;
 494         'avatar' => {
 495                 'sub' => \&feature_avatar,
 496                 'override' => 0,
 497                 'default' => ['']},
 498
 499         # Enable displaying how much time and how many git commands
 500         # it took to generate and display page.  Disabled by default.
 501         # Project specific override is not supported.
 502         'timed' => {
 503                 'override' => 0,
 504                 'default' => [0]},
 505
 506         # Enable turning some links into links to actions which require
 507         # JavaScript to run (like 'blame_incremental').  Not enabled by
 508         # default.  Project specific override is currently not supported.
 509         'javascript-actions' => {
 510                 'override' => 0,
 511                 'default' => [0]},
 512
 513         # Enable and configure ability to change common timezone for dates
 514         # in gitweb output via JavaScript.  Enabled by default.
 515         # Project specific override is not supported.
 516         'javascript-timezone' => {
 517                 'override' => 0,
 518                 'default' => [
 519                         'local',     # default timezone: 'utc', 'local', or '(-|+)HHMM' format,
 520                                      # or undef to turn off this feature
 521                         'gitweb_tz', # name of cookie where to store selected timezone
 522                         'datetime',  # CSS class used to mark up dates for manipulation
 523                 ]},
 524
 525         # Syntax highlighting support. This is based on Daniel Svensson's
 526         # and Sham Chukoury's work in gitweb-xmms2.git.
 527         # It requires the 'highlight' program present in $PATH,
 528         # and therefore is disabled by default.
 529
 530         # To enable system wide have in $GITWEB_CONFIG
 531         # $feature{'highlight'}{'default'} = [1];
 532
 533         'highlight' => {
 534                 'sub' => sub { feature_bool('highlight', @_) },
 535                 'override' => 0,
 536                 'default' => [0]},
 537
 538         # Enable displaying of remote heads in the heads list
 539
 540         # To enable system wide have in $GITWEB_CONFIG
 541         # $feature{'remote_heads'}{'default'} = [1];
 542         # To have project specific config enable override in $GITWEB_CONFIG
 543         # $feature{'remote_heads'}{'override'} = 1;
 544         # and in project config gitweb.remoteheads = 0|1;
 545         'remote_heads' => {
 546                 'sub' => sub { feature_bool('remote_heads', @_) },
 547                 'override' => 0,
 548                 'default' => [0]},
 549 );
 550
 551 sub gitweb_get_feature {
 552         my ($name) = @_;
 553         return unless exists $feature{$name};
 554         my ($sub, $override, @defaults) = (
 555                 $feature{$name}{'sub'},
 556                 $feature{$name}{'override'},
 557                 @{$feature{$name}{'default'}});
 558         # project specific override is possible only if we have project
 559         our $git_dir; # global variable, declared later
 560         if (!$override || !defined $git_dir) {
 561                 return @defaults;
 562         }
 563         if (!defined $sub) {
 564                 warn "feature $name is not overridable";
 565                 return @defaults;
 566         }
 567         return $sub->(@defaults);
 568 }
 569
 570 # A wrapper to check if a given feature is enabled.
 571 # With this, you can say
 572 #
 573 #   my $bool_feat = gitweb_check_feature('bool_feat');
 574 #   gitweb_check_feature('bool_feat') or somecode;
 575 #
 576 # instead of
 577 #
 578 #   my ($bool_feat) = gitweb_get_feature('bool_feat');
 579 #   (gitweb_get_feature('bool_feat'))[0] or somecode;
 580 #
 581 sub gitweb_check_feature {
 582         return (gitweb_get_feature(@_))[0];
 583 }
 584
 585
 586 sub feature_bool {
 587         my $key = shift;
 588         my ($val) = git_get_project_config($key, '--bool');
 589
 590         if (!defined $val) {
 591                 return ($_[0]);
 592         } elsif ($val eq 'true') {
 593                 return (1);
 594         } elsif ($val eq 'false') {
 595                 return (0);
 596         }
 597 }
 598
 599 sub feature_snapshot {
 600         my (@fmts) = @_;
 601
 602         my ($val) = git_get_project_config('snapshot');
 603
 604         if ($val) {
 605                 @fmts = ($val eq 'none' ? () : split /\s*[,\s]\s*/, $val);
 606         }
 607
 608         return @fmts;
 609 }
 610
 611 sub feature_patches {
 612         my @val = (git_get_project_config('patches', '--int'));
 613
 614         if (@val) {
 615                 return @val;
 616         }
 617
 618         return ($_[0]);
 619 }
 620
 621 sub feature_avatar {
 622         my @val = (git_get_project_config('avatar'));
 623
 624         return @val ? @val : @_;
 625 }
 626
 627 # checking HEAD file with -e is fragile if the repository was
 628 # initialized long time ago (i.e. symlink HEAD) and was pack-ref'ed
 629 # and then pruned.
 630 sub check_head_link {
 631         my ($dir) = @_;
 632         my $headfile = "$dir/HEAD";
 633         return ((-e $headfile) ||
 634                 (-l $headfile && readlink($headfile) =~ /^refs\/heads\//));
 635 }
 636
 637 sub check_export_ok {
 638         my ($dir) = @_;
 639         return (check_head_link($dir) &&
 640                 (!$export_ok || -e "$dir/$export_ok") &&
 641                 (!$export_auth_hook || $export_auth_hook->($dir)));
 642 }
 643
 644 # process alternate names for backward compatibility
 645 # filter out unsupported (unknown) snapshot formats
 646 sub filter_snapshot_fmts {
 647         my @fmts = @_;
 648
 649         @fmts = map {
 650                 exists $known_snapshot_format_aliases{$_} ?
 651                        $known_snapshot_format_aliases{$_} : $_} @fmts;
 652         @fmts = grep {
 653                 exists $known_snapshot_formats{$_} &&
 654                 !$known_snapshot_formats{$_}{'disabled'}} @fmts;
 655 }
 656
 657 # If it is set to code reference, it is code that it is to be run once per
 658 # request, allowing updating configurations that change with each request,
 659 # while running other code in config file only once.
 660 #
 661 # Otherwise, if it is false then gitweb would process config file only once;
 662 # if it is true then gitweb config would be run for each request.
 663 our $per_request_config = 1;
 664
 665 # read and parse gitweb config file given by its parameter.
 666 # returns true on success, false on recoverable error, allowing
 667 # to chain this subroutine, using first file that exists.
 668 # dies on errors during parsing config file, as it is unrecoverable.
 669 sub read_config_file {
 670         my $filename = shift;
 671         return unless defined $filename;
 672         # die if there are errors parsing config file
 673         if (-e $filename) {
 674                 do $filename;
 675                 die $@ if $@;
 676                 return 1;
 677         }
 678         return;
 679 }
 680
 681 our ($GITWEB_CONFIG, $GITWEB_CONFIG_SYSTEM, $GITWEB_CONFIG_COMMON);
 682 sub evaluate_gitweb_config {
 683         our $GITWEB_CONFIG = $ENV{'GITWEB_CONFIG'} || "++GITWEB_CONFIG++";
 684         our $GITWEB_CONFIG_SYSTEM = $ENV{'GITWEB_CONFIG_SYSTEM'} || "++GITWEB_CONFIG_SYSTEM++";
 685         our $GITWEB_CONFIG_COMMON = $ENV{'GITWEB_CONFIG_COMMON'} || "++GITWEB_CONFIG_COMMON++";
 686
 687         # Protect against duplications of file names, to not read config twice.
 688         # Only one of $GITWEB_CONFIG and $GITWEB_CONFIG_SYSTEM is used, so
 689         # there possibility of duplication of filename there doesn't matter.
 690         $GITWEB_CONFIG = ""        if ($GITWEB_CONFIG eq $GITWEB_CONFIG_COMMON);
 691         $GITWEB_CONFIG_SYSTEM = "" if ($GITWEB_CONFIG_SYSTEM eq $GITWEB_CONFIG_COMMON);
 692
 693         # Common system-wide settings for convenience.
 694         # Those settings can be ovverriden by GITWEB_CONFIG or GITWEB_CONFIG_SYSTEM.
 695         read_config_file($GITWEB_CONFIG_COMMON);
 696
 697         # Use first config file that exists.  This means use the per-instance
 698         # GITWEB_CONFIG if exists, otherwise use GITWEB_SYSTEM_CONFIG.
 699         read_config_file($GITWEB_CONFIG) and return;
 700         read_config_file($GITWEB_CONFIG_SYSTEM);
 701 }
 702
 703 # Get loadavg of system, to compare against $maxload.
 704 # Currently it requires '/proc/loadavg' present to get loadavg;
 705 # if it is not present it returns 0, which means no load checking.
 706 sub get_loadavg {
 707         if( -e '/proc/loadavg' ){
 708                 open my $fd, '<', '/proc/loadavg'
 709                         or return 0;
 710                 my @load = split(/\s+/, scalar <$fd>);
 711                 close $fd;
 712
 713                 # The first three columns measure CPU and IO utilization of the last one,
 714                 # five, and 10 minute periods.  The fourth column shows the number of
 715                 # currently running processes and the total number of processes in the m/n
 716                 # format.  The last column displays the last process ID used.
 717                 return $load[0] || 0;
 718         }
 719         # additional checks for load average should go here for things that don't export
 720         # /proc/loadavg
 721
 722         return 0;
 723 }
 724
 725 # version of the core git binary
 726 our $git_version;
 727 sub evaluate_git_version {
 728         our $git_version = qx("$GIT" --version) =~ m/git version (.*)$/ ? $1 : "unknown";
 729         $number_of_git_cmds++;
 730 }
 731
 732 sub check_loadavg {
 733         if (defined $maxload && get_loadavg() > $maxload) {
 734                 die_error(503, "The load average on the server is too high");
 735         }
 736 }
 737
 738 # ======================================================================
 739 # input validation and dispatch
 740
 741 # input parameters can be collected from a variety of sources (presently, CGI
 742 # and PATH_INFO), so we define an %input_params hash that collects them all
 743 # together during validation: this allows subsequent uses (e.g. href()) to be
 744 # agnostic of the parameter origin
 745
 746 our %input_params = ();
 747
 748 # input parameters are stored with the long parameter name as key. This will
 749 # also be used in the href subroutine to convert parameters to their CGI
 750 # equivalent, and since the href() usage is the most frequent one, we store
 751 # the name -> CGI key mapping here, instead of the reverse.
 752 #
 753 # XXX: Warning: If you touch this, check the search form for updating,
 754 # too.
 755
 756 our @cgi_param_mapping = (
 757         project => "p",
 758         action => "a",
 759         file_name => "f",
 760         file_parent => "fp",
 761         hash => "h",
 762         hash_parent => "hp",
 763         hash_base => "hb",
 764         hash_parent_base => "hpb",
 765         page => "pg",
 766         order => "o",
 767         searchtext => "s",
 768         searchtype => "st",
 769         snapshot_format => "sf",
 770         extra_options => "opt",
 771         search_use_regexp => "sr",
 772         ctag => "by_tag",
 773         diff_style => "ds",
 774         project_filter => "pf",
 775         # this must be last entry (for manipulation from JavaScript)
 776         javascript => "js"
 777 );
 778 our %cgi_param_mapping = @cgi_param_mapping;
 779
 780 # we will also need to know the possible actions, for validation
 781 our %actions = (
 782         "blame" => \&git_blame,
 783         "blame_incremental" => \&git_blame_incremental,
 784         "blame_data" => \&git_blame_data,
 785         "blobdiff" => \&git_blobdiff,
 786         "blobdiff_plain" => \&git_blobdiff_plain,
 787         "blob" => \&git_blob,
 788         "blob_plain" => \&git_blob_plain,
 789         "commitdiff" => \&git_commitdiff,
 790         "commitdiff_plain" => \&git_commitdiff_plain,
 791         "commit" => \&git_commit,
 792         "forks" => \&git_forks,
 793         "heads" => \&git_heads,
 794         "history" => \&git_history,
 795         "log" => \&git_log,
 796         "patch" => \&git_patch,
 797         "patches" => \&git_patches,
 798         "remotes" => \&git_remotes,
 799         "rss" => \&git_rss,
 800         "atom" => \&git_atom,
 801         "search" => \&git_search,
 802         "search_help" => \&git_search_help,
 803         "shortlog" => \&git_shortlog,
 804         "summary" => \&git_summary,
 805         "tag" => \&git_tag,
 806         "tags" => \&git_tags,
 807         "tree" => \&git_tree,
 808         "snapshot" => \&git_snapshot,
 809         "object" => \&git_object,
 810         # those below don't need $project
 811         "opml" => \&git_opml,
 812         "project_list" => \&git_project_list,
 813         "project_index" => \&git_project_index,
 814 );
 815
 816 # finally, we have the hash of allowed extra_options for the commands that
 817 # allow them
 818 our %allowed_options = (
 819         "--no-merges" => [ qw(rss atom log shortlog history) ],
 820 );
 821
 822 # fill %input_params with the CGI parameters. All values except for 'opt'
 823 # should be single values, but opt can be an array. We should probably
 824 # build an array of parameters that can be multi-valued, but since for the time
 825 # being it's only this one, we just single it out
 826 sub evaluate_query_params {
 827         our $cgi;
 828
 829         while (my ($name, $symbol) = each %cgi_param_mapping) {
 830                 if ($symbol eq 'opt') {
 831                         $input_params{$name} = [ map { decode_utf8($_) } $cgi->param($symbol) ];
 832                 } else {
 833                         $input_params{$name} = decode_utf8($cgi->param($symbol));
 834                 }
 835         }
 836 }
 837
 838 # now read PATH_INFO and update the parameter list for missing parameters
 839 sub evaluate_path_info {
 840         return if defined $input_params{'project'};
 841         return if !$path_info;
 842         $path_info =~ s,^/+,,;
 843         return if !$path_info;
 844
 845         # find which part of PATH_INFO is project
 846         my $project = $path_info;
 847         $project =~ s,/+$,,;
 848         while ($project && !check_head_link("$projectroot/$project")) {
 849                 $project =~ s,/*[^/]*$,,;
 850         }
 851         return unless $project;
 852         $input_params{'project'} = $project;
 853
 854         # do not change any parameters if an action is given using the query string
 855         return if $input_params{'action'};
 856         $path_info =~ s,^\Q$project\E/*,,;
 857
 858         # next, check if we have an action
 859         my $action = $path_info;
 860         $action =~ s,/.*$,,;
 861         if (exists $actions{$action}) {
 862                 $path_info =~ s,^$action/*,,;
 863                 $input_params{'action'} = $action;
 864         }
 865
 866         # list of actions that want hash_base instead of hash, but can have no
 867         # pathname (f) parameter
 868         my @wants_base = (
 869                 'tree',
 870                 'history',
 871         );
 872
 873         # we want to catch, among others
 874         # [$hash_parent_base[:$file_parent]..]$hash_parent[:$file_name]
 875         my ($parentrefname, $parentpathname, $refname, $pathname) =
 876                 ($path_info =~ /^(?:(.+?)(?::(.+))?\.\.)?([^:]+?)?(?::(.+))?$/);
 877
 878         # first, analyze the 'current' part
 879         if (defined $pathname) {
 880                 # we got "branch:filename" or "branch:dir/"
 881                 # we could use git_get_type(branch:pathname), but:
 882                 # - it needs $git_dir
 883                 # - it does a git() call
 884                 # - the convention of terminating directories with a slash
 885                 #   makes it superfluous
 886                 # - embedding the action in the PATH_INFO would make it even
 887                 #   more superfluous
 888                 $pathname =~ s,^/+,,;
 889                 if (!$pathname || substr($pathname, -1) eq "/") {
 890                         $input_params{'action'} ||= "tree";
 891                         $pathname =~ s,/$,,;
 892                 } else {
 893                         # the default action depends on whether we had parent info
 894                         # or not
 895                         if ($parentrefname) {
 896                                 $input_params{'action'} ||= "blobdiff_plain";
 897                         } else {
 898                                 $input_params{'action'} ||= "blob_plain";
 899                         }
 900                 }
 901                 $input_params{'hash_base'} ||= $refname;
 902                 $input_params{'file_name'} ||= $pathname;
 903         } elsif (defined $refname) {
 904                 # we got "branch". In this case we have to choose if we have to
 905                 # set hash or hash_base.
 906                 #
 907                 # Most of the actions without a pathname only want hash to be
 908                 # set, except for the ones specified in @wants_base that want
 909                 # hash_base instead. It should also be noted that hand-crafted
 910                 # links having 'history' as an action and no pathname or hash
 911                 # set will fail, but that happens regardless of PATH_INFO.
 912                 if (defined $parentrefname) {
 913                         # if there is parent let the default be 'shortlog' action
 914                         # (for http://git.example.com/repo.git/A..B links); if there
 915                         # is no parent, dispatch will detect type of object and set
 916                         # action appropriately if required (if action is not set)
 917                         $input_params{'action'} ||= "shortlog";
 918                 }
 919                 if ($input_params{'action'} &&
 920                     grep { $_ eq $input_params{'action'} } @wants_base) {
 921                         $input_params{'hash_base'} ||= $refname;
 922                 } else {
 923                         $input_params{'hash'} ||= $refname;
 924                 }
 925         }
 926
 927         # next, handle the 'parent' part, if present
 928         if (defined $parentrefname) {
 929                 # a missing pathspec defaults to the 'current' filename, allowing e.g.
 930                 # someproject/blobdiff/oldrev..newrev:/filename
 931                 if ($parentpathname) {
 932                         $parentpathname =~ s,^/+,,;
 933                         $parentpathname =~ s,/$,,;
 934                         $input_params{'file_parent'} ||= $parentpathname;
 935                 } else {
 936                         $input_params{'file_parent'} ||= $input_params{'file_name'};
 937                 }
 938                 # we assume that hash_parent_base is wanted if a path was specified,
 939                 # or if the action wants hash_base instead of hash
 940                 if (defined $input_params{'file_parent'} ||
 941                         grep { $_ eq $input_params{'action'} } @wants_base) {
 942                         $input_params{'hash_parent_base'} ||= $parentrefname;
 943                 } else {
 944                         $input_params{'hash_parent'} ||= $parentrefname;
 945                 }
 946         }
 947
 948         # for the snapshot action, we allow URLs in the form
 949         # $project/snapshot/$hash.ext
 950         # where .ext determines the snapshot and gets removed from the
 951         # passed $refname to provide the $hash.
 952         #
 953         # To be able to tell that $refname includes the format extension, we
 954         # require the following two conditions to be satisfied:
 955         # - the hash input parameter MUST have been set from the $refname part
 956         #   of the URL (i.e. they must be equal)
 957         # - the snapshot format MUST NOT have been defined already (e.g. from
 958         #   CGI parameter sf)
 959         # It's also useless to try any matching unless $refname has a dot,
 960         # so we check for that too
 961         if (defined $input_params{'action'} &&
 962                 $input_params{'action'} eq 'snapshot' &&
 963                 defined $refname && index($refname, '.') != -1 &&
 964                 $refname eq $input_params{'hash'} &&
 965                 !defined $input_params{'snapshot_format'}) {
 966                 # We loop over the known snapshot formats, checking for
 967                 # extensions. Allowed extensions are both the defined suffix
 968                 # (which includes the initial dot already) and the snapshot
 969                 # format key itself, with a prepended dot
 970                 while (my ($fmt, $opt) = each %known_snapshot_formats) {
 971                         my $hash = $refname;
 972                         unless ($hash =~ s/(\Q$opt->{'suffix'}\E|\Q.$fmt\E)$//) {
 973                                 next;
 974                         }
 975                         my $sfx = $1;
 976                         # a valid suffix was found, so set the snapshot format
 977                         # and reset the hash parameter
 978                         $input_params{'snapshot_format'} = $fmt;
 979                         $input_params{'hash'} = $hash;
 980                         # we also set the format suffix to the one requested
 981                         # in the URL: this way a request for e.g. .tgz returns
 982                         # a .tgz instead of a .tar.gz
 983                         $known_snapshot_formats{$fmt}{'suffix'} = $sfx;
 984                         last;
 985                 }
 986         }
 987 }
 988
 989 our ($action, $project, $file_name, $file_parent, $hash, $hash_parent, $hash_base,
 990      $hash_parent_base, @extra_options, $page, $searchtype, $search_use_regexp,
 991      $searchtext, $search_regexp, $project_filter);
 992 sub evaluate_and_validate_params {
 993         our $action = $input_params{'action'};
 994         if (defined $action) {
 995                 if (!validate_action($action)) {
 996                         die_error(400, "Invalid action parameter");
 997                 }
 998         }
 999
1000         # parameters which are pathnames
1001         our $project = $input_params{'project'};
1002         if (defined $project) {
1003                 if (!validate_project($project)) {
1004                         undef $project;
1005                         die_error(404, "No such project");
1006                 }
1007         }
1008
1009         our $project_filter = $input_params{'project_filter'};
1010         if (defined $project_filter) {
1011                 if (!validate_pathname($project_filter)) {
1012                         die_error(404, "Invalid project_filter parameter");
1013                 }
1014         }
1015
1016         our $file_name = $input_params{'file_name'};
1017         if (defined $file_name) {
1018                 if (!validate_pathname($file_name)) {
1019                         die_error(400, "Invalid file parameter");
1020                 }
1021         }
1022
1023         our $file_parent = $input_params{'file_parent'};
1024         if (defined $file_parent) {
1025                 if (!validate_pathname($file_parent)) {
1026                         die_error(400, "Invalid file parent parameter");
1027                 }
1028         }
1029
1030         # parameters which are refnames
1031         our $hash = $input_params{'hash'};
1032         if (defined $hash) {
1033                 if (!validate_refname($hash)) {
1034                         die_error(400, "Invalid hash parameter");
1035                 }
1036         }
1037
1038         our $hash_parent = $input_params{'hash_parent'};
1039         if (defined $hash_parent) {
1040                 if (!validate_refname($hash_parent)) {
1041                         die_error(400, "Invalid hash parent parameter");
1042                 }
1043         }
1044
1045         our $hash_base = $input_params{'hash_base'};
1046         if (defined $hash_base) {
1047                 if (!validate_refname($hash_base)) {
1048                         die_error(400, "Invalid hash base parameter");
1049                 }
1050         }
1051
1052         our @extra_options = @{$input_params{'extra_options'}};
1053         # @extra_options is always defined, since it can only be (currently) set from
1054         # CGI, and $cgi->param() returns the empty array in array context if the param
1055         # is not set
1056         foreach my $opt (@extra_options) {
1057                 if (not exists $allowed_options{$opt}) {
1058                         die_error(400, "Invalid option parameter");
1059                 }
1060                 if (not grep(/^$action$/, @{$allowed_options{$opt}})) {
1061                         die_error(400, "Invalid option parameter for this action");
1062                 }
1063         }
1064
1065         our $hash_parent_base = $input_params{'hash_parent_base'};
1066         if (defined $hash_parent_base) {
1067                 if (!validate_refname($hash_parent_base)) {
1068                         die_error(400, "Invalid hash parent base parameter");
1069                 }
1070         }
1071
1072         # other parameters
1073         our $page = $input_params{'page'};
1074         if (defined $page) {
1075                 if ($page =~ m/[^0-9]/) {
1076                         die_error(400, "Invalid page parameter");
1077                 }
1078         }
1079
1080         our $searchtype = $input_params{'searchtype'};
1081         if (defined $searchtype) {
1082                 if ($searchtype =~ m/[^a-z]/) {
1083                         die_error(400, "Invalid searchtype parameter");
1084                 }
1085         }
1086
1087         our $search_use_regexp = $input_params{'search_use_regexp'};
1088
1089         our $searchtext = $input_params{'searchtext'};
1090         our $search_regexp = undef;
1091         if (defined $searchtext) {
1092                 if (length($searchtext) < 2) {
1093                         die_error(403, "At least two characters are required for search parameter");
1094                 }
1095                 if ($search_use_regexp) {
1096                         $search_regexp = $searchtext;
1097                         if (!eval { qr/$search_regexp/; 1; }) {
1098                                 (my $error = $@) =~ s/ at \S+ line \d+.*\n?//;
1099                                 die_error(400, "Invalid search regexp '$search_regexp'",
1100                                           esc_html($error));
1101                         }
1102                 } else {
1103                         $search_regexp = quotemeta $searchtext;
1104                 }
1105         }
1106 }
1107
1108 # path to the current git repository
1109 our $git_dir;
1110 sub evaluate_git_dir {
1111         our $git_dir = "$projectroot/$project" if $project;
1112 }
1113
1114 our (@snapshot_fmts, $git_avatar);
1115 sub configure_gitweb_features {
1116         # list of supported snapshot formats
1117         our @snapshot_fmts = gitweb_get_feature('snapshot');
1118         @snapshot_fmts = filter_snapshot_fmts(@snapshot_fmts);
1119
1120         # check that the avatar feature is set to a known provider name,
1121         # and for each provider check if the dependencies are satisfied.
1122         # if the provider name is invalid or the dependencies are not met,
1123         # reset $git_avatar to the empty string.
1124         our ($git_avatar) = gitweb_get_feature('avatar');
1125         if ($git_avatar eq 'gravatar') {
1126                 $git_avatar = '' unless (eval { require Digest::MD5; 1; });
1127         } elsif ($git_avatar eq 'picon') {
1128                 # no dependencies
1129         } else {
1130                 $git_avatar = '';
1131         }
1132 }
1133
1134 # custom error handler: 'die <message>' is Internal Server Error
1135 sub handle_errors_html {
1136         my $msg = shift; # it is already HTML escaped
1137
1138         # to avoid infinite loop where error occurs in die_error,
1139         # change handler to default handler, disabling handle_errors_html
1140         set_message("Error occurred when inside die_error:\n$msg");
1141
1142         # you cannot jump out of die_error when called as error handler;
1143         # the subroutine set via CGI::Carp::set_message is called _after_
1144         # HTTP headers are already written, so it cannot write them itself
1145         die_error(undef, undef, $msg, -error_handler => 1, -no_http_header => 1);
1146 }
1147 set_message(\&handle_errors_html);
1148
1149 # dispatch
1150 sub dispatch {
1151         if (!defined $action) {
1152                 if (defined $hash) {
1153                         $action = git_get_type($hash);
1154                         $action or die_error(404, "Object does not exist");
1155                 } elsif (defined $hash_base && defined $file_name) {
1156                         $action = git_get_type("$hash_base:$file_name");
1157                         $action or die_error(404, "File or directory does not exist");
1158                 } elsif (defined $project) {
1159                         $action = 'summary';
1160                 } else {
1161                         $action = 'project_list';
1162                 }
1163         }
1164         if (!defined($actions{$action})) {
1165                 die_error(400, "Unknown action");
1166         }
1167         if ($action !~ m/^(?:opml|project_list|project_index)$/ &&
1168             !$project) {
1169                 die_error(400, "Project needed");
1170         }
1171         $actions{$action}->();
1172 }
1173
1174 sub reset_timer {
1175         our $t0 = [ gettimeofday() ]
1176                 if defined $t0;
1177         our $number_of_git_cmds = 0;
1178 }
1179
1180 our $first_request = 1;
1181 sub run_request {
1182         reset_timer();
1183
1184         evaluate_uri();
1185         if ($first_request) {
1186                 evaluate_gitweb_config();
1187                 evaluate_git_version();
1188         }
1189         if ($per_request_config) {
1190                 if (ref($per_request_config) eq 'CODE') {
1191                         $per_request_config->();
1192                 } elsif (!$first_request) {
1193                         evaluate_gitweb_config();
1194                 }
1195         }
1196         check_loadavg();
1197
1198         # $projectroot and $projects_list might be set in gitweb config file
1199         $projects_list ||= $projectroot;
1200
1201         evaluate_query_params();
1202         evaluate_path_info();
1203         evaluate_and_validate_params();
1204         evaluate_git_dir();
1205
1206         configure_gitweb_features();
1207
1208         dispatch();
1209 }
1210
1211 our $is_last_request = sub { 1 };
1212 our ($pre_dispatch_hook, $post_dispatch_hook, $pre_listen_hook);
1213 our $CGI = 'CGI';
1214 our $cgi;
1215 sub configure_as_fcgi {
1216         require CGI::Fast;
1217         our $CGI = 'CGI::Fast';
1218
1219         my $request_number = 0;
1220         # let each child service 100 requests
1221         our $is_last_request = sub { ++$request_number > 100 };
1222 }
1223 sub evaluate_argv {
1224         my $script_name = $ENV{'SCRIPT_NAME'} || $ENV{'SCRIPT_FILENAME'} || __FILE__;
1225         configure_as_fcgi()
1226                 if $script_name =~ /\.fcgi$/;
1227
1228         return unless (@ARGV);
1229
1230         require Getopt::Long;
1231         Getopt::Long::GetOptions(
1232                 'fastcgi|fcgi|f' => \&configure_as_fcgi,
1233                 'nproc|n=i' => sub {
1234                         my ($arg, $val) = @_;
1235                         return unless eval { require FCGI::ProcManager; 1; };
1236                         my $proc_manager = FCGI::ProcManager->new({
1237                                 n_processes => $val,
1238                         });
1239                         our $pre_listen_hook    = sub { $proc_manager->pm_manage()        };
1240                         our $pre_dispatch_hook  = sub { $proc_manager->pm_pre_dispatch()  };
1241                         our $post_dispatch_hook = sub { $proc_manager->pm_post_dispatch() };
1242                 },
1243         );
1244 }
1245
1246 sub run {
1247         evaluate_argv();
1248
1249         $first_request = 1;
1250         $pre_listen_hook->()
1251                 if $pre_listen_hook;
1252
1253  REQUEST:
1254         while ($cgi = $CGI->new()) {
1255                 $pre_dispatch_hook->()
1256                         if $pre_dispatch_hook;
1257
1258                 run_request();
1259
1260                 $post_dispatch_hook->()
1261                         if $post_dispatch_hook;
1262                 $first_request = 0;
1263
1264                 last REQUEST if ($is_last_request->());
1265         }
1266
1267  DONE_GITWEB:
1268         1;
1269 }
1270
1271 run();
1272
1273 if (defined caller) {
1274         # wrapped in a subroutine processing requests,
1275         # e.g. mod_perl with ModPerl::Registry, or PSGI with Plack::App::WrapCGI
1276         return;
1277 } else {
1278         # pure CGI script, serving single request
1279         exit;
1280 }
1281
1282 ## ======================================================================
1283 ## action links
1284
1285 # possible values of extra options
1286 # -full => 0|1      - use absolute/full URL ($my_uri/$my_url as base)
1287 # -replay => 1      - start from a current view (replay with modifications)
1288 # -path_info => 0|1 - don't use/use path_info URL (if possible)
1289 # -anchor => ANCHOR - add #ANCHOR to end of URL, implies -replay if used alone
1290 sub href {
1291         my %params = @_;
1292         # default is to use -absolute url() i.e. $my_uri
1293         my $href = $params{-full} ? $my_url : $my_uri;
1294
1295         # implicit -replay, must be first of implicit params
1296         $params{-replay} = 1 if (keys %params == 1 && $params{-anchor});
1297
1298         $params{'project'} = $project unless exists $params{'project'};
1299
1300         if ($params{-replay}) {
1301                 while (my ($name, $symbol) = each %cgi_param_mapping) {
1302                         if (!exists $params{$name}) {
1303                                 $params{$name} = $input_params{$name};
1304                         }
1305                 }
1306         }
1307
1308         my $use_pathinfo = gitweb_check_feature('pathinfo');
1309         if (defined $params{'project'} &&
1310             (exists $params{-path_info} ? $params{-path_info} : $use_pathinfo)) {
1311                 # try to put as many parameters as possible in PATH_INFO:
1312                 #   - project name
1313                 #   - action
1314                 #   - hash_parent or hash_parent_base:/file_parent
1315                 #   - hash or hash_base:/filename
1316                 #   - the snapshot_format as an appropriate suffix
1317
1318                 # When the script is the root DirectoryIndex for the domain,
1319                 # $href here would be something like http://gitweb.example.com/
1320                 # Thus, we strip any trailing / from $href, to spare us double
1321                 # slashes in the final URL
1322                 $href =~ s,/$,,;
1323
1324                 # Then add the project name, if present
1325                 $href .= "/".esc_path_info($params{'project'});
1326                 delete $params{'project'};
1327
1328                 # since we destructively absorb parameters, we keep this
1329                 # boolean that remembers if we're handling a snapshot
1330                 my $is_snapshot = $params{'action'} eq 'snapshot';
1331
1332                 # Summary just uses the project path URL, any other action is
1333                 # added to the URL
1334                 if (defined $params{'action'}) {
1335                         $href .= "/".esc_path_info($params{'action'})
1336                                 unless $params{'action'} eq 'summary';
1337                         delete $params{'action'};
1338                 }
1339
1340                 # Next, we put hash_parent_base:/file_parent..hash_base:/file_name,
1341                 # stripping nonexistent or useless pieces
1342                 $href .= "/" if ($params{'hash_base'} || $params{'hash_parent_base'}
1343                         || $params{'hash_parent'} || $params{'hash'});
1344                 if (defined $params{'hash_base'}) {
1345                         if (defined $params{'hash_parent_base'}) {
1346                                 $href .= esc_path_info($params{'hash_parent_base'});
1347                                 # skip the file_parent if it's the same as the file_name
1348                                 if (defined $params{'file_parent'}) {
1349                                         if (defined $params{'file_name'} && $params{'file_parent'} eq $params{'file_name'}) {
1350                                                 delete $params{'file_parent'};
1351                                         } elsif ($params{'file_parent'} !~ /\.\./) {
1352                                                 $href .= ":/".esc_path_info($params{'file_parent'});
1353                                                 delete $params{'file_parent'};
1354                                         }
1355                                 }
1356                                 $href .= "..";
1357                                 delete $params{'hash_parent'};
1358                                 delete $params{'hash_parent_base'};
1359                         } elsif (defined $params{'hash_parent'}) {
1360                                 $href .= esc_path_info($params{'hash_parent'}). "..";
1361                                 delete $params{'hash_parent'};
1362                         }
1363
1364                         $href .= esc_path_info($params{'hash_base'});
1365                         if (defined $params{'file_name'} && $params{'file_name'} !~ /\.\./) {
1366                                 $href .= ":/".esc_path_info($params{'file_name'});
1367                                 delete $params{'file_name'};
1368                         }
1369                         delete $params{'hash'};
1370                         delete $params{'hash_base'};
1371                 } elsif (defined $params{'hash'}) {
1372                         $href .= esc_path_info($params{'hash'});
1373                         delete $params{'hash'};
1374                 }
1375
1376                 # If the action was a snapshot, we can absorb the
1377                 # snapshot_format parameter too
1378                 if ($is_snapshot) {
1379                         my $fmt = $params{'snapshot_format'};
1380                         # snapshot_format should always be defined when href()
1381                         # is called, but just in case some code forgets, we
1382                         # fall back to the default
1383                         $fmt ||= $snapshot_fmts[0];
1384                         $href .= $known_snapshot_formats{$fmt}{'suffix'};
1385                         delete $params{'snapshot_format'};
1386                 }
1387         }
1388
1389         # now encode the parameters explicitly
1390         my @result = ();
1391         for (my $i = 0; $i < @cgi_param_mapping; $i += 2) {
1392                 my ($name, $symbol) = ($cgi_param_mapping[$i], $cgi_param_mapping[$i+1]);
1393                 if (defined $params{$name}) {
1394                         if (ref($params{$name}) eq "ARRAY") {
1395                                 foreach my $par (@{$params{$name}}) {
1396                                         push @result, $symbol . "=" . esc_param($par);
1397                                 }
1398                         } else {
1399                                 push @result, $symbol . "=" . esc_param($params{$name});
1400                         }
1401                 }
1402         }
1403         $href .= "?" . join(';', @result) if scalar @result;
1404
1405         # final transformation: trailing spaces must be escaped (URI-encoded)
1406         $href =~ s/(\s+)$/CGI::escape($1)/e;
1407
1408         if ($params{-anchor}) {
1409                 $href .= "#".esc_param($params{-anchor});
1410         }
1411
1412         return $href;
1413 }
1414
1415
1416 ## ======================================================================
1417 ## validation, quoting/unquoting and escaping
1418
1419 sub validate_action {
1420         my $input = shift || return undef;
1421         return undef unless exists $actions{$input};
1422         return $input;
1423 }
1424
1425 sub validate_project {
1426         my $input = shift || return undef;
1427         if (!validate_pathname($input) ||
1428                 !(-d "$projectroot/$input") ||
1429                 !check_export_ok("$projectroot/$input") ||
1430                 ($strict_export && !project_in_list($input))) {
1431                 return undef;
1432         } else {
1433                 return $input;
1434         }
1435 }
1436
1437 sub validate_pathname {
1438         my $input = shift || return undef;
1439
1440         # no '.' or '..' as elements of path, i.e. no '.' nor '..'
1441         # at the beginning, at the end, and between slashes.
1442         # also this catches doubled slashes
1443         if ($input =~ m!(^|/)(|\.|\.\.)(/|$)!) {
1444                 return undef;
1445         }
1446         # no null characters
1447         if ($input =~ m!\0!) {
1448                 return undef;
1449         }
1450         return $input;
1451 }
1452
1453 sub validate_refname {
1454         my $input = shift || return undef;
1455
1456         # textual hashes are O.K.
1457         if ($input =~ m/^[0-9a-fA-F]{40}$/) {
1458                 return $input;
1459         }
1460         # it must be correct pathname
1461         $input = validate_pathname($input)
1462                 or return undef;
1463         # restrictions on ref name according to git-check-ref-format
1464         if ($input =~ m!(/\.|\.\.|[\000-\040\177 ~^:?*\[]|/$)!) {
1465                 return undef;
1466         }
1467         return $input;
1468 }
1469
1470 # decode sequences of octets in utf8 into Perl's internal form,
1471 # which is utf-8 with utf8 flag set if needed.  gitweb writes out
1472 # in utf-8 thanks to "binmode STDOUT, ':utf8'" at beginning
1473 sub to_utf8 {
1474         my $str = shift;
1475         return undef unless defined $str;
1476
1477         if (utf8::is_utf8($str) || utf8::decode($str)) {
1478                 return $str;
1479         } else {
1480                 return decode($fallback_encoding, $str, Encode::FB_DEFAULT);
1481         }
1482 }
1483
1484 # quote unsafe chars, but keep the slash, even when it's not
1485 # correct, but quoted slashes look too horrible in bookmarks
1486 sub esc_param {
1487         my $str = shift;
1488         return undef unless defined $str;
1489         $str =~ s/([^A-Za-z0-9\-_.~()\/:@ ]+)/CGI::escape($1)/eg;
1490         $str =~ s/ /\+/g;
1491         return $str;
1492 }
1493
1494 # the quoting rules for path_info fragment are slightly different
1495 sub esc_path_info {
1496         my $str = shift;
1497         return undef unless defined $str;
1498
1499         # path_info doesn't treat '+' as space (specially), but '?' must be escaped
1500         $str =~ s/([^A-Za-z0-9\-_.~();\/;:@&= +]+)/CGI::escape($1)/eg;
1501
1502         return $str;
1503 }
1504
1505 # quote unsafe chars in whole URL, so some characters cannot be quoted
1506 sub esc_url {
1507         my $str = shift;
1508         return undef unless defined $str;
1509         $str =~ s/([^A-Za-z0-9\-_.~();\/;?:@&= ]+)/CGI::escape($1)/eg;
1510         $str =~ s/ /\+/g;
1511         return $str;
1512 }
1513
1514 # quote unsafe characters in HTML attributes
1515 sub esc_attr {
1516
1517         # for XHTML conformance escaping '"' to '&quot;' is not enough
1518         return esc_html(@_);
1519 }
1520
1521 # replace invalid utf8 character with SUBSTITUTION sequence
1522 sub esc_html {
1523         my $str = shift;
1524         my %opts = @_;
1525
1526         return undef unless defined $str;
1527
1528         $str = to_utf8($str);
1529         $str = $cgi->escapeHTML($str);
1530         if ($opts{'-nbsp'}) {
1531                 $str =~ s/ /&nbsp;/g;
1532         }
1533         $str =~ s|([[:cntrl:]])|(($1 ne "\t") ? quot_cec($1) : $1)|eg;
1534         return $str;
1535 }
1536
1537 # quote control characters and escape filename to HTML
1538 sub esc_path {
1539         my $str = shift;
1540         my %opts = @_;
1541
1542         return undef unless defined $str;
1543
1544         $str = to_utf8($str);
1545         $str = $cgi->escapeHTML($str);
1546         if ($opts{'-nbsp'}) {
1547                 $str =~ s/ /&nbsp;/g;
1548         }
1549         $str =~ s|([[:cntrl:]])|quot_cec($1)|eg;
1550         return $str;
1551 }
1552
1553 # Sanitize for use in XHTML + application/xml+xhtm (valid XML 1.0)
1554 sub sanitize {
1555         my $str = shift;
1556
1557         return undef unless defined $str;
1558
1559         $str = to_utf8($str);
1560         $str =~ s|([[:cntrl:]])|(index("\t\n\r", $1) != -1 ? $1 : quot_cec($1))|eg;
1561         return $str;
1562 }
1563
1564 # Make control characters "printable", using character escape codes (CEC)
1565 sub quot_cec {
1566         my $cntrl = shift;
1567         my %opts = @_;
1568         my %es = ( # character escape codes, aka escape sequences
1569                 "\t" => '\t',   # tab            (HT)
1570                 "\n" => '\n',   # line feed      (LF)
1571                 "\r" => '\r',   # carrige return (CR)
1572                 "\f" => '\f',   # form feed      (FF)
1573                 "\b" => '\b',   # backspace      (BS)
1574                 "\a" => '\a',   # alarm (bell)   (BEL)
1575                 "\e" => '\e',   # escape         (ESC)
1576                 "\013" => '\v', # vertical tab   (VT)
1577                 "\000" => '\0', # nul character  (NUL)
1578         );
1579         my $chr = ( (exists $es{$cntrl})
1580                     ? $es{$cntrl}
1581                     : sprintf('\%2x', ord($cntrl)) );
1582         if ($opts{-nohtml}) {
1583                 return $chr;
1584         } else {
1585                 return "<span class=\"cntrl\">$chr</span>";
1586         }
1587 }
1588
1589 # Alternatively use unicode control pictures codepoints,
1590 # Unicode "printable representation" (PR)
1591 sub quot_upr {
1592         my $cntrl = shift;
1593         my %opts = @_;
1594
1595         my $chr = sprintf('&#%04d;', 0x2400+ord($cntrl));
1596         if ($opts{-nohtml}) {
1597                 return $chr;
1598         } else {
1599                 return "<span class=\"cntrl\">$chr</span>";
1600         }
1601 }
1602
1603 # git may return quoted and escaped filenames
1604 sub unquote {
1605         my $str = shift;
1606
1607         sub unq {
1608                 my $seq = shift;
1609                 my %es = ( # character escape codes, aka escape sequences
1610                         't' => "\t",   # tab            (HT, TAB)
1611                         'n' => "\n",   # newline        (NL)
1612                         'r' => "\r",   # return         (CR)
1613                         'f' => "\f",   # form feed      (FF)
1614                         'b' => "\b",   # backspace      (BS)
1615                         'a' => "\a",   # alarm (bell)   (BEL)
1616                         'e' => "\e",   # escape         (ESC)
1617                         'v' => "\013", # vertical tab   (VT)
1618                 );
1619
1620                 if ($seq =~ m/^[0-7]{1,3}$/) {
1621                         # octal char sequence
1622                         return chr(oct($seq));
1623                 } elsif (exists $es{$seq}) {
1624                         # C escape sequence, aka character escape code
1625                         return $es{$seq};
1626                 }
1627                 # quoted ordinary character
1628                 return $seq;
1629         }
1630
1631         if ($str =~ m/^"(.*)"$/) {
1632                 # needs unquoting
1633                 $str = $1;
1634                 $str =~ s/\\([^0-7]|[0-7]{1,3})/unq($1)/eg;
1635         }
1636         return $str;
1637 }
1638
1639 # escape tabs (convert tabs to spaces)
1640 sub untabify {
1641         my $line = shift;
1642
1643         while ((my $pos = index($line, "\t")) != -1) {
1644                 if (my $count = (8 - ($pos % 8))) {
1645                         my $spaces = ' ' x $count;
1646                         $line =~ s/\t/$spaces/;
1647                 }
1648         }
1649
1650         return $line;
1651 }
1652
1653 sub project_in_list {
1654         my $project = shift;
1655         my @list = git_get_projects_list();
1656         return @list && scalar(grep { $_->{'path'} eq $project } @list);
1657 }
1658
1659 ## ----------------------------------------------------------------------
1660 ## HTML aware string manipulation
1661
1662 # Try to chop given string on a word boundary between position
1663 # $len and $len+$add_len. If there is no word boundary there,
1664 # chop at $len+$add_len. Do not chop if chopped part plus ellipsis
1665 # (marking chopped part) would be longer than given string.
1666 sub chop_str {
1667         my $str = shift;
1668         my $len = shift;
1669         my $add_len = shift || 10;
1670         my $where = shift || 'right'; # 'left' | 'center' | 'right'
1671
1672         # Make sure perl knows it is utf8 encoded so we don't
1673         # cut in the middle of a utf8 multibyte char.
1674         $str = to_utf8($str);
1675
1676         # allow only $len chars, but don't cut a word if it would fit in $add_len
1677         # if it doesn't fit, cut it if it's still longer than the dots we would add
1678         # remove chopped character entities entirely
1679
1680         # when chopping in the middle, distribute $len into left and right part
1681         # return early if chopping wouldn't make string shorter
1682         if ($where eq 'center') {
1683                 return $str if ($len + 5 >= length($str)); # filler is length 5
1684                 $len = int($len/2);
1685         } else {
1686                 return $str if ($len + 4 >= length($str)); # filler is length 4
1687         }
1688
1689         # regexps: ending and beginning with word part up to $add_len
1690         my $endre = qr/.{$len}\w{0,$add_len}/;
1691         my $begre = qr/\w{0,$add_len}.{$len}/;
1692
1693         if ($where eq 'left') {
1694                 $str =~ m/^(.*?)($begre)$/;
1695                 my ($lead, $body) = ($1, $2);
1696                 if (length($lead) > 4) {
1697                         $lead = " ...";
1698                 }
1699                 return "$lead$body";
1700
1701         } elsif ($where eq 'center') {
1702                 $str =~ m/^($endre)(.*)$/;
1703                 my ($left, $str)  = ($1, $2);
1704                 $str =~ m/^(.*?)($begre)$/;
1705                 my ($mid, $right) = ($1, $2);
1706                 if (length($mid) > 5) {
1707                         $mid = " ... ";
1708                 }
1709                 return "$left$mid$right";
1710
1711         } else {
1712                 $str =~ m/^($endre)(.*)$/;
1713                 my $body = $1;
1714                 my $tail = $2;
1715                 if (length($tail) > 4) {
1716                         $tail = "... ";
1717                 }
1718                 return "$body$tail";
1719         }
1720 }
1721
1722 # takes the same arguments as chop_str, but also wraps a <span> around the
1723 # result with a title attribute if it does get chopped. Additionally, the
1724 # string is HTML-escaped.
1725 sub chop_and_escape_str {
1726         my ($str) = @_;
1727
1728         my $chopped = chop_str(@_);
1729         $str = to_utf8($str);
1730         if ($chopped eq $str) {
1731                 return esc_html($chopped);
1732         } else {
1733                 $str =~ s/[[:cntrl:]]/?/g;
1734                 return $cgi->span({-title=>$str}, esc_html($chopped));
1735         }
1736 }
1737
1738 # Highlight selected fragments of string, using given CSS class,
1739 # and escape HTML.  It is assumed that fragments do not overlap.
1740 # Regions are passed as list of pairs (array references).
1741 #
1742 # Example: esc_html_hl_regions("foobar", "mark", [ 0, 3 ]) returns
1743 # '<span class="mark">foo</span>bar'
1744 sub esc_html_hl_regions {
1745         my ($str, $css_class, @sel) = @_;
1746         my %opts = grep { ref($_) ne 'ARRAY' } @sel;
1747         @sel     = grep { ref($_) eq 'ARRAY' } @sel;
1748         return esc_html($str, %opts) unless @sel;
1749
1750         my $out = '';
1751         my $pos = 0;
1752
1753         for my $s (@sel) {
1754                 my ($begin, $end) = @$s;
1755
1756                 # Don't create empty <span> elements.
1757                 next if $end <= $begin;
1758
1759                 my $escaped = esc_html(substr($str, $begin, $end - $begin),
1760                                        %opts);
1761
1762                 $out .= esc_html(substr($str, $pos, $begin - $pos), %opts)
1763                         if ($begin - $pos > 0);
1764                 $out .= $cgi->span({-class => $css_class}, $escaped);
1765
1766                 $pos = $end;
1767         }
1768         $out .= esc_html(substr($str, $pos), %opts)
1769                 if ($pos < length($str));
1770
1771         return $out;
1772 }
1773
1774 # return positions of beginning and end of each match
1775 sub matchpos_list {
1776         my ($str, $regexp) = @_;
1777         return unless (defined $str && defined $regexp);
1778
1779         my @matches;
1780         while ($str =~ /$regexp/g) {
1781                 push @matches, [$-[0], $+[0]];
1782         }
1783         return @matches;
1784 }
1785
1786 # highlight match (if any), and escape HTML
1787 sub esc_html_match_hl {
1788         my ($str, $regexp) = @_;
1789         return esc_html($str) unless defined $regexp;
1790
1791         my @matches = matchpos_list($str, $regexp);
1792         return esc_html($str) unless @matches;
1793
1794         return esc_html_hl_regions($str, 'match', @matches);
1795 }
1796
1797
1798 # highlight match (if any) of shortened string, and escape HTML
1799 sub esc_html_match_hl_chopped {
1800         my ($str, $chopped, $regexp) = @_;
1801         return esc_html_match_hl($str, $regexp) unless defined $chopped;
1802
1803         my @matches = matchpos_list($str, $regexp);
1804         return esc_html($chopped) unless @matches;
1805
1806         # filter matches so that we mark chopped string
1807         my $tail = "... "; # see chop_str
1808         unless ($chopped =~ s/\Q$tail\E$//) {
1809                 $tail = '';
1810         }
1811         my $chop_len = length($chopped);
1812         my $tail_len = length($tail);
1813         my @filtered;
1814
1815         for my $m (@matches) {
1816                 if ($m->[0] > $chop_len) {
1817                         push @filtered, [ $chop_len, $chop_len + $tail_len ] if ($tail_len > 0);
1818                         last;
1819                 } elsif ($m->[1] > $chop_len) {
1820                         push @filtered, [ $m->[0], $chop_len + $tail_len ];
1821                         last;
1822                 }
1823                 push @filtered, $m;
1824         }
1825
1826         return esc_html_hl_regions($chopped . $tail, 'match', @filtered);
1827 }
1828
1829 ## ----------------------------------------------------------------------
1830 ## functions returning short strings
1831
1832 # CSS class for given age value (in seconds)
1833 sub age_class {
1834         my $age = shift;
1835
1836         if (!defined $age) {
1837                 return "noage";
1838         } elsif ($age < 60*60*2) {
1839                 return "age0";
1840         } elsif ($age < 60*60*24*2) {
1841                 return "age1";
1842         } else {
1843                 return "age2";
1844         }
1845 }
1846
1847 # convert age in seconds to "nn units ago" string
1848 sub age_string {
1849         my $age = shift;
1850         my $age_str;
1851
1852         if ($age > 60*60*24*365*2) {
1853                 $age_str = (int $age/60/60/24/365);
1854                 $age_str .= " years ago";
1855         } elsif ($age > 60*60*24*(365/12)*2) {
1856                 $age_str = int $age/60/60/24/(365/12);
1857                 $age_str .= " months ago";
1858         } elsif ($age > 60*60*24*7*2) {
1859                 $age_str = int $age/60/60/24/7;
1860                 $age_str .= " weeks ago";
1861         } elsif ($age > 60*60*24*2) {
1862                 $age_str = int $age/60/60/24;
1863                 $age_str .= " days ago";
1864         } elsif ($age > 60*60*2) {
1865                 $age_str = int $age/60/60;
1866                 $age_str .= " hours ago";
1867         } elsif ($age > 60*2) {
1868                 $age_str = int $age/60;
1869                 $age_str .= " min ago";
1870         } elsif ($age > 2) {
1871                 $age_str = int $age;
1872                 $age_str .= " sec ago";
1873         } else {
1874                 $age_str .= " right now";
1875         }
1876         return $age_str;
1877 }
1878
1879 use constant {
1880         S_IFINVALID => 0030000,
1881         S_IFGITLINK => 0160000,
1882 };
1883
1884 # submodule/subproject, a commit object reference
1885 sub S_ISGITLINK {
1886         my $mode = shift;
1887
1888         return (($mode & S_IFMT) == S_IFGITLINK)
1889 }
1890
1891 # convert file mode in octal to symbolic file mode string
1892 sub mode_str {
1893         my $mode = oct shift;
1894
1895         if (S_ISGITLINK($mode)) {
1896                 return 'm---------';
1897         } elsif (S_ISDIR($mode & S_IFMT)) {
1898                 return 'drwxr-xr-x';
1899         } elsif (S_ISLNK($mode)) {
1900                 return 'lrwxrwxrwx';
1901         } elsif (S_ISREG($mode)) {
1902                 # git cares only about the executable bit
1903                 if ($mode & S_IXUSR) {
1904                         return '-rwxr-xr-x';
1905                 } else {
1906                         return '-rw-r--r--';
1907                 };
1908         } else {
1909                 return '----------';
1910         }
1911 }
1912
1913 # convert file mode in octal to file type string
1914 sub file_type {
1915         my $mode = shift;
1916
1917         if ($mode !~ m/^[0-7]+$/) {
1918                 return $mode;
1919         } else {
1920                 $mode = oct $mode;
1921         }
1922
1923         if (S_ISGITLINK($mode)) {
1924                 return "submodule";
1925         } elsif (S_ISDIR($mode & S_IFMT)) {
1926                 return "directory";
1927         } elsif (S_ISLNK($mode)) {
1928                 return "symlink";
1929         } elsif (S_ISREG($mode)) {
1930                 return "file";
1931         } else {
1932                 return "unknown";
1933         }
1934 }
1935
1936 # convert file mode in octal to file type description string
1937 sub file_type_long {
1938         my $mode = shift;
1939
1940         if ($mode !~ m/^[0-7]+$/) {
1941                 return $mode;
1942         } else {
1943                 $mode = oct $mode;
1944         }
1945
1946         if (S_ISGITLINK($mode)) {
1947                 return "submodule";
1948         } elsif (S_ISDIR($mode & S_IFMT)) {
1949                 return "directory";
1950         } elsif (S_ISLNK($mode)) {
1951                 return "symlink";
1952         } elsif (S_ISREG($mode)) {
1953                 if ($mode & S_IXUSR) {
1954                         return "executable";
1955                 } else {
1956                         return "file";
1957                 };
1958         } else {
1959                 return "unknown";
1960         }
1961 }
1962
1963
1964 ## ----------------------------------------------------------------------
1965 ## functions returning short HTML fragments, or transforming HTML fragments
1966 ## which don't belong to other sections
1967
1968 # format line of commit message.
1969 sub format_log_line_html {
1970         my $line = shift;
1971
1972         $line = esc_html($line, -nbsp=>1);
1973         $line =~ s{\b([0-9a-fA-F]{8,40})\b}{
1974                 $cgi->a({-href => href(action=>"object", hash=>$1),
1975                                         -class => "text"}, $1);
1976         }eg;
1977
1978         return $line;
1979 }
1980
1981 # format marker of refs pointing to given object
1982
1983 # the destination action is chosen based on object type and current context:
1984 # - for annotated tags, we choose the tag view unless it's the current view
1985 #   already, in which case we go to shortlog view
1986 # - for other refs, we keep the current view if we're in history, shortlog or
1987 #   log view, and select shortlog otherwise
1988 sub format_ref_marker {
1989         my ($refs, $id) = @_;
1990         my $markers = '';
1991
1992         if (defined $refs->{$id}) {
1993                 foreach my $ref (@{$refs->{$id}}) {
1994                         # this code exploits the fact that non-lightweight tags are the
1995                         # only indirect objects, and that they are the only objects for which
1996                         # we want to use tag instead of shortlog as action
1997                         my ($type, $name) = qw();
1998                         my $indirect = ($ref =~ s/\^\{\}$//);
1999                         # e.g. tags/v2.6.11 or heads/next
2000                         if ($ref =~ m!^(.*?)s?/(.*)$!) {
2001                                 $type = $1;
2002                                 $name = $2;
2003                         } else {
2004                                 $type = "ref";
2005                                 $name = $ref;
2006                         }
2007
2008                         my $class = $type;
2009                         $class .= " indirect" if $indirect;
2010
2011                         my $dest_action = "shortlog";
2012
2013                         if ($indirect) {
2014                                 $dest_action = "tag" unless $action eq "tag";
2015                         } elsif ($action =~ /^(history|(short)?log)$/) {
2016                                 $dest_action = $action;
2017                         }
2018
2019                         my $dest = "";
2020                         $dest .= "refs/" unless $ref =~ m!^refs/!;
2021                         $dest .= $ref;
2022
2023                         my $link = $cgi->a({
2024                                 -href => href(
2025                                         action=>$dest_action,
2026                                         hash=>$dest
2027                                 )}, $name);
2028
2029                         $markers .= " <span class=\"".esc_attr($class)."\" title=\"".esc_attr($ref)."\">" .
2030                                 $link . "</span>";
2031                 }
2032         }
2033
2034         if ($markers) {
2035                 return ' <span class="refs">'. $markers . '</span>';
2036         } else {
2037                 return "";
2038         }
2039 }
2040
2041 # format, perhaps shortened and with markers, title line
2042 sub format_subject_html {
2043         my ($long, $short, $href, $extra) = @_;
2044         $extra = '' unless defined($extra);
2045
2046         if (length($short) < length($long)) {
2047                 $long =~ s/[[:cntrl:]]/?/g;
2048                 return $cgi->a({-href => $href, -class => "list subject",
2049                                 -title => to_utf8($long)},
2050                        esc_html($short)) . $extra;
2051         } else {
2052                 return $cgi->a({-href => $href, -class => "list subject"},
2053                        esc_html($long)) . $extra;
2054         }
2055 }
2056
2057 # Rather than recomputing the url for an email multiple times, we cache it
2058 # after the first hit. This gives a visible benefit in views where the avatar
2059 # for the same email is used repeatedly (e.g. shortlog).
2060 # The cache is shared by all avatar engines (currently gravatar only), which
2061 # are free to use it as preferred. Since only one avatar engine is used for any
2062 # given page, there's no risk for cache conflicts.
2063 our %avatar_cache = ();
2064
2065 # Compute the picon url for a given email, by using the picon search service over at
2066 # http://www.cs.indiana.edu/picons/search.html
2067 sub picon_url {
2068         my $email = lc shift;
2069         if (!$avatar_cache{$email}) {
2070                 my ($user, $domain) = split('@', $email);
2071                 $avatar_cache{$email} =
2072                         "//www.cs.indiana.edu/cgi-pub/kinzler/piconsearch.cgi/" .
2073                         "$domain/$user/" .
2074                         "users+domains+unknown/up/single";
2075         }
2076         return $avatar_cache{$email};
2077 }
2078
2079 # Compute the gravatar url for a given email, if it's not in the cache already.
2080 # Gravatar stores only the part of the URL before the size, since that's the
2081 # one computationally more expensive. This also allows reuse of the cache for
2082 # different sizes (for this particular engine).
2083 sub gravatar_url {
2084         my $email = lc shift;
2085         my $size = shift;
2086         $avatar_cache{$email} ||=
2087                 "//www.gravatar.com/avatar/" .
2088                         Digest::MD5::md5_hex($email) . "?s=";
2089         return $avatar_cache{$email} . $size;
2090 }
2091
2092 # Insert an avatar for the given $email at the given $size if the feature
2093 # is enabled.
2094 sub git_get_avatar {
2095         my ($email, %opts) = @_;
2096         my $pre_white  = ($opts{-pad_before} ? "&nbsp;" : "");
2097         my $post_white = ($opts{-pad_after}  ? "&nbsp;" : "");
2098         $opts{-size} ||= 'default';
2099         my $size = $avatar_size{$opts{-size}} || $avatar_size{'default'};
2100         my $url = "";
2101         if ($git_avatar eq 'gravatar') {
2102                 $url = gravatar_url($email, $size);
2103         } elsif ($git_avatar eq 'picon') {
2104                 $url = picon_url($email);
2105         }
2106         # Other providers can be added by extending the if chain, defining $url
2107         # as needed. If no variant puts something in $url, we assume avatars
2108         # are completely disabled/unavailable.
2109         if ($url) {
2110                 return $pre_white .
2111                        "<img width=\"$size\" " .
2112                             "class=\"avatar\" " .
2113                             "src=\"".esc_url($url)."\" " .
2114                             "alt=\"\" " .
2115                        "/>" . $post_white;
2116         } else {
2117                 return "";
2118         }
2119 }
2120
2121 sub format_search_author {
2122         my ($author, $searchtype, $displaytext) = @_;
2123         my $have_search = gitweb_check_feature('search');
2124
2125         if ($have_search) {
2126                 my $performed = "";
2127                 if ($searchtype eq 'author') {
2128                         $performed = "authored";
2129                 } elsif ($searchtype eq 'committer') {
2130                         $performed = "committed";
2131                 }
2132
2133                 return $cgi->a({-href => href(action=>"search", hash=>$hash,
2134                                 searchtext=>$author,
2135                                 searchtype=>$searchtype), class=>"list",
2136                                 title=>"Search for commits $performed by $author"},
2137                                 $displaytext);
2138
2139         } else {
2140                 return $displaytext;
2141         }
2142 }
2143
2144 # format the author name of the given commit with the given tag
2145 # the author name is chopped and escaped according to the other
2146 # optional parameters (see chop_str).
2147 sub format_author_html {
2148         my $tag = shift;
2149         my $co = shift;
2150         my $author = chop_and_escape_str($co->{'author_name'}, @_);
2151         return "<$tag class=\"author\">" .
2152                format_search_author($co->{'author_name'}, "author",
2153                        git_get_avatar($co->{'author_email'}, -pad_after => 1) .
2154                        $author) .
2155                "</$tag>";
2156 }
2157
2158 # format git diff header line, i.e. "diff --(git|combined|cc) ..."
2159 sub format_git_diff_header_line {
2160         my $line = shift;
2161         my $diffinfo = shift;
2162         my ($from, $to) = @_;
2163
2164         if ($diffinfo->{'nparents'}) {
2165                 # combined diff
2166                 $line =~ s!^(diff (.*?) )"?.*$!$1!;
2167                 if ($to->{'href'}) {
2168                         $line .= $cgi->a({-href => $to->{'href'}, -class => "path"},
2169                                          esc_path($to->{'file'}));
2170                 } else { # file was deleted (no href)
2171                         $line .= esc_path($to->{'file'});
2172                 }
2173         } else {
2174                 # "ordinary" diff
2175                 $line =~ s!^(diff (.*?) )"?a/.*$!$1!;
2176                 if ($from->{'href'}) {
2177                         $line .= $cgi->a({-href => $from->{'href'}, -class => "path"},
2178                                          'a/' . esc_path($from->{'file'}));
2179                 } else { # file was added (no href)
2180                         $line .= 'a/' . esc_path($from->{'file'});
2181                 }
2182                 $line .= ' ';
2183                 if ($to->{'href'}) {
2184                         $line .= $cgi->a({-href => $to->{'href'}, -class => "path"},
2185                                          'b/' . esc_path($to->{'file'}));
2186                 } else { # file was deleted
2187                         $line .= 'b/' . esc_path($to->{'file'});
2188                 }
2189         }
2190
2191         return "<div class=\"diff header\">$line</div>\n";
2192 }
2193
2194 # format extended diff header line, before patch itself
2195 sub format_extended_diff_header_line {
2196         my $line = shift;
2197         my $diffinfo = shift;
2198         my ($from, $to) = @_;
2199
2200         # match <path>
2201         if ($line =~ s!^((copy|rename) from ).*$!$1! && $from->{'href'}) {
2202                 $line .= $cgi->a({-href=>$from->{'href'}, -class=>"path"},
2203                                        esc_path($from->{'file'}));
2204         }
2205         if ($line =~ s!^((copy|rename) to ).*$!$1! && $to->{'href'}) {
2206                 $line .= $cgi->a({-href=>$to->{'href'}, -class=>"path"},
2207                                  esc_path($to->{'file'}));
2208         }
2209         # match single <mode>
2210         if ($line =~ m/\s(\d{6})$/) {
2211                 $line .= '<span class="info"> (' .
2212                          file_type_long($1) .
2213                          ')</span>';
2214         }
2215         # match <hash>
2216         if ($line =~ m/^index [0-9a-fA-F]{40},[0-9a-fA-F]{40}/) {
2217                 # can match only for combined diff
2218                 $line = 'index ';
2219                 for (my $i = 0; $i < $diffinfo->{'nparents'}; $i++) {
2220                         if ($from->{'href'}[$i]) {
2221                                 $line .= $cgi->a({-href=>$from->{'href'}[$i],
2222                                                   -class=>"hash"},
2223                                                  substr($diffinfo->{'from_id'}[$i],0,7));
2224                         } else {
2225                                 $line .= '0' x 7;
2226                         }
2227                         # separator
2228                         $line .= ',' if ($i < $diffinfo->{'nparents'} - 1);
2229                 }
2230                 $line .= '..';
2231                 if ($to->{'href'}) {
2232                         $line .= $cgi->a({-href=>$to->{'href'}, -class=>"hash"},
2233                                          substr($diffinfo->{'to_id'},0,7));
2234                 } else {
2235                         $line .= '0' x 7;
2236                 }
2237
2238         } elsif ($line =~ m/^index [0-9a-fA-F]{40}..[0-9a-fA-F]{40}/) {
2239                 # can match only for ordinary diff
2240                 my ($from_link, $to_link);
2241                 if ($from->{'href'}) {
2242                         $from_link = $cgi->a({-href=>$from->{'href'}, -class=>"hash"},
2243                                              substr($diffinfo->{'from_id'},0,7));
2244                 } else {
2245                         $from_link = '0' x 7;
2246                 }
2247                 if ($to->{'href'}) {
2248                         $to_link = $cgi->a({-href=>$to->{'href'}, -class=>"hash"},
2249                                            substr($diffinfo->{'to_id'},0,7));
2250                 } else {
2251                         $to_link = '0' x 7;
2252                 }
2253                 my ($from_id, $to_id) = ($diffinfo->{'from_id'}, $diffinfo->{'to_id'});
2254                 $line =~ s!$from_id\.\.$to_id!$from_link..$to_link!;
2255         }
2256
2257         return $line . "<br/>\n";
2258 }
2259
2260 # format from-file/to-file diff header
2261 sub format_diff_from_to_header {
2262         my ($from_line, $to_line, $diffinfo, $from, $to, @parents) = @_;
2263         my $line;
2264         my $result = '';
2265
2266         $line = $from_line;
2267         #assert($line =~ m/^---/) if DEBUG;
2268         # no extra formatting for "^--- /dev/null"
2269         if (! $diffinfo->{'nparents'}) {
2270                 # ordinary (single parent) diff
2271                 if ($line =~ m!^--- "?a/!) {
2272                         if ($from->{'href'}) {
2273                                 $line = '--- a/' .
2274                                         $cgi->a({-href=>$from->{'href'}, -class=>"path"},
2275                                                 esc_path($from->{'file'}));
2276                         } else {
2277                                 $line = '--- a/' .
2278                                         esc_path($from->{'file'});
2279                         }
2280                 }
2281                 $result .= qq!<div class="diff from_file">$line</div>\n!;
2282
2283         } else {
2284                 # combined diff (merge commit)
2285                 for (my $i = 0; $i < $diffinfo->{'nparents'}; $i++) {
2286                         if ($from->{'href'}[$i]) {
2287                                 $line = '--- ' .
2288                                         $cgi->a({-href=>href(action=>"blobdiff",
2289                                                              hash_parent=>$diffinfo->{'from_id'}[$i],
2290                                                              hash_parent_base=>$parents[$i],
2291                                                              file_parent=>$from->{'file'}[$i],
2292                                                              hash=>$diffinfo->{'to_id'},
2293                                                              hash_base=>$hash,
2294                                                              file_name=>$to->{'file'}),
2295                                                  -class=>"path",
2296                                                  -title=>"diff" . ($i+1)},
2297                                                 $i+1) .
2298                                         '/' .
2299                                         $cgi->a({-href=>$from->{'href'}[$i], -class=>"path"},
2300                                                 esc_path($from->{'file'}[$i]));
2301                         } else {
2302                                 $line = '--- /dev/null';
2303                         }
2304                         $result .= qq!<div class="diff from_file">$line</div>\n!;
2305                 }
2306         }
2307
2308         $line = $to_line;
2309         #assert($line =~ m/^\+\+\+/) if DEBUG;
2310         # no extra formatting for "^+++ /dev/null"
2311         if ($line =~ m!^\+\+\+ "?b/!) {
2312                 if ($to->{'href'}) {
2313                         $line = '+++ b/' .
2314                                 $cgi->a({-href=>$to->{'href'}, -class=>"path"},
2315                                         esc_path($to->{'file'}));
2316                 } else {
2317                         $line = '+++ b/' .
2318                                 esc_path($to->{'file'});
2319                 }
2320         }
2321         $result .= qq!<div class="diff to_file">$line</div>\n!;
2322
2323         return $result;
2324 }
2325
2326 # create note for patch simplified by combined diff
2327 sub format_diff_cc_simplified {
2328         my ($diffinfo, @parents) = @_;
2329         my $result = '';
2330
2331         $result .= "<div class=\"diff header\">" .
2332                    "diff --cc ";
2333         if (!is_deleted($diffinfo)) {
2334                 $result .= $cgi->a({-href => href(action=>"blob",
2335                                                   hash_base=>$hash,
2336                                                   hash=>$diffinfo->{'to_id'},
2337                                                   file_name=>$diffinfo->{'to_file'}),
2338                                     -class => "path"},
2339                                    esc_path($diffinfo->{'to_file'}));
2340         } else {
2341                 $result .= esc_path($diffinfo->{'to_file'});
2342         }
2343         $result .= "</div>\n" . # class="diff header"
2344                    "<div class=\"diff nodifferences\">" .
2345                    "Simple merge" .
2346                    "</div>\n"; # class="diff nodifferences"
2347
2348         return $result;
2349 }
2350
2351 sub diff_line_class {
2352         my ($line, $from, $to) = @_;
2353
2354         # ordinary diff
2355         my $num_sign = 1;
2356         # combined diff
2357         if ($from && $to && ref($from->{'href'}) eq "ARRAY") {
2358                 $num_sign = scalar @{$from->{'href'}};
2359         }
2360
2361         my @diff_line_classifier = (
2362                 { regexp => qr/^\@\@{$num_sign} /, class => "chunk_header"},
2363                 { regexp => qr/^\\/,               class => "incomplete"  },
2364                 { regexp => qr/^ {$num_sign}/,     class => "ctx" },
2365                 # classifier for context must come before classifier add/rem,
2366                 # or we would have to use more complicated regexp, for example
2367                 # qr/(?= {0,$m}\+)[+ ]{$num_sign}/, where $m = $num_sign - 1;
2368                 { regexp => qr/^[+ ]{$num_sign}/,   class => "add" },
2369                 { regexp => qr/^[- ]{$num_sign}/,   class => "rem" },
2370         );
2371         for my $clsfy (@diff_line_classifier) {
2372                 return $clsfy->{'class'}
2373                         if ($line =~ $clsfy->{'regexp'});
2374         }
2375
2376         # fallback
2377         return "";
2378 }
2379
2380 # assumes that $from and $to are defined and correctly filled,
2381 # and that $line holds a line of chunk header for unified diff
2382 sub format_unidiff_chunk_header {
2383         my ($line, $from, $to) = @_;
2384
2385         my ($from_text, $from_start, $from_lines, $to_text, $to_start, $to_lines, $section) =
2386                 $line =~ m/^\@{2} (-(\d+)(?:,(\d+))?) (\+(\d+)(?:,(\d+))?) \@{2}(.*)$/;
2387
2388         $from_lines = 0 unless defined $from_lines;
2389         $to_lines   = 0 unless defined $to_lines;
2390
2391         if ($from->{'href'}) {
2392                 $from_text = $cgi->a({-href=>"$from->{'href'}#l$from_start",
2393                                      -class=>"list"}, $from_text);
2394         }
2395         if ($to->{'href'}) {
2396                 $to_text   = $cgi->a({-href=>"$to->{'href'}#l$to_start",
2397                                      -class=>"list"}, $to_text);
2398         }
2399         $line = "<span class=\"chunk_info\">@@ $from_text $to_text @@</span>" .
2400                 "<span class=\"section\">" . esc_html($section, -nbsp=>1) . "</span>";
2401         return $line;
2402 }
2403
2404 # assumes that $from and $to are defined and correctly filled,
2405 # and that $line holds a line of chunk header for combined diff
2406 sub format_cc_diff_chunk_header {
2407         my ($line, $from, $to) = @_;
2408
2409         my ($prefix, $ranges, $section) = $line =~ m/^(\@+) (.*?) \@+(.*)$/;
2410         my (@from_text, @from_start, @from_nlines, $to_text, $to_start, $to_nlines);
2411
2412         @from_text = split(' ', $ranges);
2413         for (my $i = 0; $i < @from_text; ++$i) {
2414                 ($from_start[$i], $from_nlines[$i]) =
2415                         (split(',', substr($from_text[$i], 1)), 0);
2416         }
2417
2418         $to_text   = pop @from_text;
2419         $to_start  = pop @from_start;
2420         $to_nlines = pop @from_nlines;
2421
2422         $line = "<span class=\"chunk_info\">$prefix ";
2423         for (my $i = 0; $i < @from_text; ++$i) {
2424                 if ($from->{'href'}[$i]) {
2425                         $line .= $cgi->a({-href=>"$from->{'href'}[$i]#l$from_start[$i]",
2426                                           -class=>"list"}, $from_text[$i]);
2427                 } else {
2428                         $line .= $from_text[$i];
2429                 }
2430                 $line .= " ";
2431         }
2432         if ($to->{'href'}) {
2433                 $line .= $cgi->a({-href=>"$to->{'href'}#l$to_start",
2434                                   -class=>"list"}, $to_text);
2435         } else {
2436                 $line .= $to_text;
2437         }
2438         $line .= " $prefix</span>" .
2439                  "<span class=\"section\">" . esc_html($section, -nbsp=>1) . "</span>";
2440         return $line;
2441 }
2442
2443 # process patch (diff) line (not to be used for diff headers),
2444 # returning HTML-formatted (but not wrapped) line.
2445 # If the line is passed as a reference, it is treated as HTML and not
2446 # esc_html()'ed.
2447 sub format_diff_line {
2448         my ($line, $diff_class, $from, $to) = @_;
2449
2450         if (ref($line)) {
2451                 $line = $$line;
2452         } else {
2453                 chomp $line;
2454                 $line = untabify($line);
2455
2456                 if ($from && $to && $line =~ m/^\@{2} /) {
2457                         $line = format_unidiff_chunk_header($line, $from, $to);
2458                 } elsif ($from && $to && $line =~ m/^\@{3}/) {
2459                         $line = format_cc_diff_chunk_header($line, $from, $to);
2460                 } else {
2461                         $line = esc_html($line, -nbsp=>1);
2462                 }
2463         }
2464
2465         my $diff_classes = "diff";
2466         $diff_classes .= " $diff_class" if ($diff_class);
2467         $line = "<div class=\"$diff_classes\">$line</div>\n";
2468
2469         return $line;
2470 }
2471
2472 # Generates undef or something like "_snapshot_" or "snapshot (_tbz2_ _zip_)",
2473 # linked.  Pass the hash of the tree/commit to snapshot.
2474 sub format_snapshot_links {
2475         my ($hash) = @_;
2476         my $num_fmts = @snapshot_fmts;
2477         if ($num_fmts > 1) {
2478                 # A parenthesized list of links bearing format names.
2479                 # e.g. "snapshot (_tar.gz_ _zip_)"
2480                 return "snapshot (" . join(' ', map
2481                         $cgi->a({
2482                                 -href => href(
2483                                         action=>"snapshot",
2484                                         hash=>$hash,
2485                                         snapshot_format=>$_
2486                                 )
2487                         }, $known_snapshot_formats{$_}{'display'})
2488                 , @snapshot_fmts) . ")";
2489         } elsif ($num_fmts == 1) {
2490                 # A single "snapshot" link whose tooltip bears the format name.
2491                 # i.e. "_snapshot_"
2492                 my ($fmt) = @snapshot_fmts;
2493                 return
2494                         $cgi->a({
2495                                 -href => href(
2496                                         action=>"snapshot",
2497                                         hash=>$hash,
2498                                         snapshot_format=>$fmt
2499                                 ),
2500                                 -title => "in format: $known_snapshot_formats{$fmt}{'display'}"
2501                         }, "snapshot");
2502         } else { # $num_fmts == 0
2503                 return undef;
2504         }
2505 }
2506
2507 ## ......................................................................
2508 ## functions returning values to be passed, perhaps after some
2509 ## transformation, to other functions; e.g. returning arguments to href()
2510
2511 # returns hash to be passed to href to generate gitweb URL
2512 # in -title key it returns description of link
2513 sub get_feed_info {
2514         my $format = shift || 'Atom';
2515         my %res = (action => lc($format));
2516
2517         # feed links are possible only for project views
2518         return unless (defined $project);
2519         # some views should link to OPML, or to generic project feed,
2520         # or don't have specific feed yet (so they should use generic)
2521         return if (!$action || $action =~ /^(?:tags|heads|forks|tag|search)$/x);
2522
2523         my $branch;
2524         # branches refs uses 'refs/heads/' prefix (fullname) to differentiate
2525         # from tag links; this also makes possible to detect branch links
2526         if ((defined $hash_base && $hash_base =~ m!^refs/heads/(.*)$!) ||
2527             (defined $hash      && $hash      =~ m!^refs/heads/(.*)$!)) {
2528                 $branch = $1;
2529         }
2530         # find log type for feed description (title)
2531         my $type = 'log';
2532         if (defined $file_name) {
2533                 $type  = "history of $file_name";
2534                 $type .= "/" if ($action eq 'tree');
2535                 $type .= " on '$branch'" if (defined $branch);
2536         } else {
2537                 $type = "log of $branch" if (defined $branch);
2538         }
2539
2540         $res{-title} = $type;
2541         $res{'hash'} = (defined $branch ? "refs/heads/$branch" : undef);
2542         $res{'file_name'} = $file_name;
2543
2544         return %res;
2545 }
2546
2547 ## ----------------------------------------------------------------------
2548 ## git utility subroutines, invoking git commands
2549
2550 # returns path to the core git executable and the --git-dir parameter as list
2551 sub git_cmd {
2552         $number_of_git_cmds++;
2553         return $GIT, '--git-dir='.$git_dir;
2554 }
2555
2556 # quote the given arguments for passing them to the shell
2557 # quote_command("command", "arg 1", "arg with ' and ! characters")
2558 # => "'command' 'arg 1' 'arg with '\'' and '\!' characters'"
2559 # Try to avoid using this function wherever possible.
2560 sub quote_command {
2561         return join(' ',
2562                 map { my $a = $_; $a =~ s/(['!])/'\\$1'/g; "'$a'" } @_ );
2563 }
2564
2565 # get HEAD ref of given project as hash
2566 sub git_get_head_hash {
2567         return git_get_full_hash(shift, 'HEAD');
2568 }
2569
2570 sub git_get_full_hash {
2571         return git_get_hash(@_);
2572 }
2573
2574 sub git_get_short_hash {
2575         return git_get_hash(@_, '--short=7');
2576 }
2577
2578 sub git_get_hash {
2579         my ($project, $hash, @options) = @_;
2580         my $o_git_dir = $git_dir;
2581         my $retval = undef;
2582         $git_dir = "$projectroot/$project";
2583         if (open my $fd, '-|', git_cmd(), 'rev-parse',
2584             '--verify', '-q', @options, $hash) {
2585                 $retval = <$fd>;
2586                 chomp $retval if defined $retval;
2587                 close $fd;
2588         }
2589         if (defined $o_git_dir) {
2590                 $git_dir = $o_git_dir;
2591         }
2592         return $retval;
2593 }
2594
2595 # get type of given object
2596 sub git_get_type {
2597         my $hash = shift;
2598
2599         open my $fd, "-|", git_cmd(), "cat-file", '-t', $hash or return;
2600         my $type = <$fd>;
2601         close $fd or return;
2602         chomp $type;
2603         return $type;
2604 }
2605
2606 # repository configuration
2607 our $config_file = '';
2608 our %config;
2609
2610 # store multiple values for single key as anonymous array reference
2611 # single values stored directly in the hash, not as [ <value> ]
2612 sub hash_set_multi {
2613         my ($hash, $key, $value) = @_;
2614
2615         if (!exists $hash->{$key}) {
2616                 $hash->{$key} = $value;
2617         } elsif (!ref $hash->{$key}) {
2618                 $hash->{$key} = [ $hash->{$key}, $value ];
2619         } else {
2620                 push @{$hash->{$key}}, $value;
2621         }
2622 }
2623
2624 # return hash of git project configuration
2625 # optionally limited to some section, e.g. 'gitweb'
2626 sub git_parse_project_config {
2627         my $section_regexp = shift;
2628         my %config;
2629
2630         local $/ = "\0";
2631
2632         open my $fh, "-|", git_cmd(), "config", '-z', '-l',
2633                 or return;
2634
2635         while (my $keyval = <$fh>) {
2636                 chomp $keyval;
2637                 my ($key, $value) = split(/\n/, $keyval, 2);
2638
2639                 hash_set_multi(\%config, $key, $value)
2640                         if (!defined $section_regexp || $key =~ /^(?:$section_regexp)\./o);
2641         }
2642         close $fh;
2643
2644         return %config;
2645 }
2646
2647 # convert config value to boolean: 'true' or 'false'
2648 # no value, number > 0, 'true' and 'yes' values are true
2649 # rest of values are treated as false (never as error)
2650 sub config_to_bool {
2651         my $val = shift;
2652
2653         return 1 if !defined $val;             # section.key
2654
2655         # strip leading and trailing whitespace
2656         $val =~ s/^\s+//;
2657         $val =~ s/\s+$//;
2658
2659         return (($val =~ /^\d+$/ && $val) ||   # section.key = 1
2660                 ($val =~ /^(?:true|yes)$/i));  # section.key = true
2661 }
2662
2663 # convert config value to simple decimal number
2664 # an optional value suffix of 'k', 'm', or 'g' will cause the value
2665 # to be multiplied by 1024, 1048576, or 1073741824
2666 sub config_to_int {
2667         my $val = shift;
2668
2669         # strip leading and trailing whitespace
2670         $val =~ s/^\s+//;
2671         $val =~ s/\s+$//;
2672
2673         if (my ($num, $unit) = ($val =~ /^([0-9]*)([kmg])$/i)) {
2674                 $unit = lc($unit);
2675                 # unknown unit is treated as 1
2676                 return $num * ($unit eq 'g' ? 1073741824 :
2677                                $unit eq 'm' ?    1048576 :
2678                                $unit eq 'k' ?       1024 : 1);
2679         }
2680         return $val;
2681 }
2682
2683 # convert config value to array reference, if needed
2684 sub config_to_multi {
2685         my $val = shift;
2686
2687         return ref($val) ? $val : (defined($val) ? [ $val ] : []);
2688 }
2689
2690 sub git_get_project_config {
2691         my ($key, $type) = @_;
2692
2693         return unless defined $git_dir;
2694
2695         # key sanity check
2696         return unless ($key);
2697         # only subsection, if exists, is case sensitive,
2698         # and not lowercased by 'git config -z -l'
2699         if (my ($hi, $mi, $lo) = ($key =~ /^([^.]*)\.(.*)\.([^.]*)$/)) {
2700                 $lo =~ s/_//g;
2701                 $key = join(".", lc($hi), $mi, lc($lo));
2702                 return if ($lo =~ /\W/ || $hi =~ /\W/);
2703         } else {
2704                 $key = lc($key);
2705                 $key =~ s/_//g;
2706                 return if ($key =~ /\W/);
2707         }
2708         $key =~ s/^gitweb\.//;
2709
2710         # type sanity check
2711         if (defined $type) {
2712                 $type =~ s/^--//;
2713                 $type = undef
2714                         unless ($type eq 'bool' || $type eq 'int');
2715         }
2716
2717         # get config
2718         if (!defined $config_file ||
2719             $config_file ne "$git_dir/config") {
2720                 %config = git_parse_project_config('gitweb');
2721                 $config_file = "$git_dir/config";
2722         }
2723
2724         # check if config variable (key) exists
2725         return unless exists $config{"gitweb.$key"};
2726
2727         # ensure given type
2728         if (!defined $type) {
2729                 return $config{"gitweb.$key"};
2730         } elsif ($type eq 'bool') {
2731                 # backward compatibility: 'git config --bool' returns true/false
2732                 return config_to_bool($config{"gitweb.$key"}) ? 'true' : 'false';
2733         } elsif ($type eq 'int') {
2734                 return config_to_int($config{"gitweb.$key"});
2735         }
2736         return $config{"gitweb.$key"};
2737 }
2738
2739 # get hash of given path at given ref
2740 sub git_get_hash_by_path {
2741         my $base = shift;
2742         my $path = shift || return undef;
2743         my $type = shift;
2744
2745         $path =~ s,/+$,,;
2746
2747         open my $fd, "-|", git_cmd(), "ls-tree", $base, "--", $path
2748                 or die_error(500, "Open git-ls-tree failed");
2749         my $line = <$fd>;
2750         close $fd or return undef;
2751
2752         if (!defined $line) {
2753                 # there is no tree or hash given by $path at $base
2754                 return undef;
2755         }
2756
2757         #'100644 blob 0fa3f3a66fb6a137f6ec2c19351ed4d807070ffa  panic.c'
2758         $line =~ m/^([0-9]+) (.+) ([0-9a-fA-F]{40})\t/;
2759         if (defined $type && $type ne $2) {
2760                 # type doesn't match
2761                 return undef;
2762         }
2763         return $3;
2764 }
2765
2766 # get path of entry with given hash at given tree-ish (ref)
2767 # used to get 'from' filename for combined diff (merge commit) for renames
2768 sub git_get_path_by_hash {
2769         my $base = shift || return;
2770         my $hash = shift || return;
2771
2772         local $/ = "\0";
2773
2774         open my $fd, "-|", git_cmd(), "ls-tree", '-r', '-t', '-z', $base
2775                 or return undef;
2776         while (my $line = <$fd>) {
2777                 chomp $line;
2778
2779                 #'040000 tree 595596a6a9117ddba9fe379b6b012b558bac8423  gitweb'
2780                 #'100644 blob e02e90f0429be0d2a69b76571101f20b8f75530f  gitweb/README'
2781                 if ($line =~ m/(?:[0-9]+) (?:.+) $hash\t(.+)$/) {
2782                         close $fd;
2783                         return $1;
2784                 }
2785         }
2786         close $fd;
2787         return undef;
2788 }
2789
2790 ## ......................................................................
2791 ## git utility functions, directly accessing git repository
2792
2793 # get the value of config variable either from file named as the variable
2794 # itself in the repository ($GIT_DIR/$name file), or from gitweb.$name
2795 # configuration variable in the repository config file.
2796 sub git_get_file_or_project_config {
2797         my ($path, $name) = @_;
2798
2799         $git_dir = "$projectroot/$path";
2800         open my $fd, '<', "$git_dir/$name"
2801                 or return git_get_project_config($name);
2802         my $conf = <$fd>;
2803         close $fd;
2804         if (defined $conf) {
2805                 chomp $conf;
2806         }
2807         return $conf;
2808 }
2809
2810 sub git_get_project_description {
2811         my $path = shift;
2812         return git_get_file_or_project_config($path, 'description');
2813 }
2814
2815 sub git_get_project_category {
2816         my $path = shift;
2817         return git_get_file_or_project_config($path, 'category');
2818 }
2819
2820
2821 # supported formats:
2822 # * $GIT_DIR/ctags/<tagname> file (in 'ctags' subdirectory)
2823 #   - if its contents is a number, use it as tag weight,
2824 #   - otherwise add a tag with weight 1
2825 # * $GIT_DIR/ctags file, each line is a tag (with weight 1)
2826 #   the same value multiple times increases tag weight
2827 # * `gitweb.ctag' multi-valued repo config variable
2828 sub git_get_project_ctags {
2829         my $project = shift;
2830         my $ctags = {};
2831
2832         $git_dir = "$projectroot/$project";
2833         if (opendir my $dh, "$git_dir/ctags") {
2834                 my @files = grep { -f $_ } map { "$git_dir/ctags/$_" } readdir($dh);
2835                 foreach my $tagfile (@files) {
2836                         open my $ct, '<', $tagfile
2837                                 or next;
2838                         my $val = <$ct>;
2839                         chomp $val if $val;
2840                         close $ct;
2841
2842                         (my $ctag = $tagfile) =~ s#.*/##;
2843                         if ($val =~ /^\d+$/) {
2844                                 $ctags->{$ctag} = $val;
2845                         } else {
2846                                 $ctags->{$ctag} = 1;
2847                         }
2848                 }
2849                 closedir $dh;
2850
2851         } elsif (open my $fh, '<', "$git_dir/ctags") {
2852                 while (my $line = <$fh>) {
2853                         chomp $line;
2854                         $ctags->{$line}++ if $line;
2855                 }
2856                 close $fh;
2857
2858         } else {
2859                 my $taglist = config_to_multi(git_get_project_config('ctag'));
2860                 foreach my $tag (@$taglist) {
2861                         $ctags->{$tag}++;
2862                 }
2863         }
2864
2865         return $ctags;
2866 }
2867
2868 # return hash, where keys are content tags ('ctags'),
2869 # and values are sum of weights of given tag in every project
2870 sub git_gather_all_ctags {
2871         my $projects = shift;
2872         my $ctags = {};
2873
2874         foreach my $p (@$projects) {
2875                 foreach my $ct (keys %{$p->{'ctags'}}) {
2876                         $ctags->{$ct} += $p->{'ctags'}->{$ct};
2877                 }
2878         }
2879
2880         return $ctags;
2881 }
2882
2883 sub git_populate_project_tagcloud {
2884         my $ctags = shift;
2885
2886         # First, merge different-cased tags; tags vote on casing
2887         my %ctags_lc;
2888         foreach (keys %$ctags) {
2889                 $ctags_lc{lc $_}->{count} += $ctags->{$_};
2890                 if (not $ctags_lc{lc $_}->{topcount}
2891                     or $ctags_lc{lc $_}->{topcount} < $ctags->{$_}) {
2892                         $ctags_lc{lc $_}->{topcount} = $ctags->{$_};
2893                         $ctags_lc{lc $_}->{topname} = $_;
2894                 }
2895         }
2896
2897         my $cloud;
2898         my $matched = $input_params{'ctag'};
2899         if (eval { require HTML::TagCloud; 1; }) {
2900                 $cloud = HTML::TagCloud->new;
2901                 foreach my $ctag (sort keys %ctags_lc) {
2902                         # Pad the title with spaces so that the cloud looks
2903                         # less crammed.
2904                         my $title = esc_html($ctags_lc{$ctag}->{topname});
2905                         $title =~ s/ /&nbsp;/g;
2906                         $title =~ s/^/&nbsp;/g;
2907                         $title =~ s/$/&nbsp;/g;
2908                         if (defined $matched && $matched eq $ctag) {
2909                                 $title = qq(<span class="match">$title</span>);
2910                         }
2911                         $cloud->add($title, href(project=>undef, ctag=>$ctag),
2912                                     $ctags_lc{$ctag}->{count});
2913                 }
2914         } else {
2915                 $cloud = {};
2916                 foreach my $ctag (keys %ctags_lc) {
2917                         my $title = esc_html($ctags_lc{$ctag}->{topname}, -nbsp=>1);
2918                         if (defined $matched && $matched eq $ctag) {
2919                                 $title = qq(<span class="match">$title</span>);
2920                         }
2921                         $cloud->{$ctag}{count} = $ctags_lc{$ctag}->{count};
2922                         $cloud->{$ctag}{ctag} =
2923                                 $cgi->a({-href=>href(project=>undef, ctag=>$ctag)}, $title);
2924                 }
2925         }
2926         return $cloud;
2927 }
2928
2929 sub git_show_project_tagcloud {
2930         my ($cloud, $count) = @_;
2931         if (ref $cloud eq 'HTML::TagCloud') {
2932                 return $cloud->html_and_css($count);
2933         } else {
2934                 my @tags = sort { $cloud->{$a}->{'count'} <=> $cloud->{$b}->{'count'} } keys %$cloud;
2935                 return
2936                         '<div id="htmltagcloud"'.($project ? '' : ' align="center"').'>' .
2937                         join (', ', map {
2938                                 $cloud->{$_}->{'ctag'}
2939                         } splice(@tags, 0, $count)) .
2940                         '</div>';
2941         }
2942 }
2943
2944 sub git_get_project_url_list {
2945         my $path = shift;
2946
2947         $git_dir = "$projectroot/$path";
2948         open my $fd, '<', "$git_dir/cloneurl"
2949                 or return wantarray ?
2950                 @{ config_to_multi(git_get_project_config('url')) } :
2951                    config_to_multi(git_get_project_config('url'));
2952         my @git_project_url_list = map { chomp; $_ } <$fd>;
2953         close $fd;
2954
2955         return wantarray ? @git_project_url_list : \@git_project_url_list;
2956 }
2957
2958 sub git_get_projects_list {
2959         my $filter = shift || '';
2960         my $paranoid = shift;
2961         my @list;
2962
2963         if (-d $projects_list) {
2964                 # search in directory
2965                 my $dir = $projects_list;
2966                 # remove the trailing "/"
2967                 $dir =~ s!/+$!!;
2968                 my $pfxlen = length("$dir");
2969                 my $pfxdepth = ($dir =~ tr!/!!);
2970                 # when filtering, search only given subdirectory
2971                 if ($filter && !$paranoid) {
2972                         $dir .= "/$filter";
2973                         $dir =~ s!/+$!!;
2974                 }
2975
2976                 File::Find::find({
2977                         follow_fast => 1, # follow symbolic links
2978                         follow_skip => 2, # ignore duplicates
2979                         dangling_symlinks => 0, # ignore dangling symlinks, silently
2980                         wanted => sub {
2981                                 # global variables
2982                                 our $project_maxdepth;
2983                                 our $projectroot;
2984                                 # skip project-list toplevel, if we get it.
2985                                 return if (m!^[/.]$!);
2986                                 # only directories can be git repositories
2987                                 return unless (-d $_);
2988                                 # don't traverse too deep (Find is super slow on os x)
2989                                 # $project_maxdepth excludes depth of $projectroot
2990                                 if (($File::Find::name =~ tr!/!!) - $pfxdepth > $project_maxdepth) {
2991                                         $File::Find::prune = 1;
2992                                         return;
2993                                 }
2994
2995                                 my $path = substr($File::Find::name, $pfxlen + 1);
2996                                 # paranoidly only filter here
2997                                 if ($paranoid && $filter && $path !~ m!^\Q$filter\E/!) {
2998                                         next;
2999                                 }
3000                                 # we check related file in $projectroot
3001                                 if (check_export_ok("$projectroot/$path")) {
3002                                         push @list, { path => $path };
3003                                         $File::Find::prune = 1;
3004                                 }
3005                         },
3006                 }, "$dir");
3007
3008         } elsif (-f $projects_list) {
3009                 # read from file(url-encoded):
3010                 # 'git%2Fgit.git Linus+Torvalds'
3011                 # 'libs%2Fklibc%2Fklibc.git H.+Peter+Anvin'
3012                 # 'linux%2Fhotplug%2Fudev.git Greg+Kroah-Hartman'
3013                 open my $fd, '<', $projects_list or return;
3014         PROJECT:
3015                 while (my $line = <$fd>) {
3016                         chomp $line;
3017                         my ($path, $owner) = split ' ', $line;
3018                         $path = unescape($path);
3019                         $owner = unescape($owner);
3020                         if (!defined $path) {
3021                                 next;
3022                         }
3023                         # if $filter is rpovided, check if $path begins with $filter
3024                         if ($filter && $path !~ m!^\Q$filter\E/!) {
3025                                 next;
3026                         }
3027                         if (check_export_ok("$projectroot/$path")) {
3028                                 my $pr = {
3029                                         path => $path
3030                                 };
3031                                 if ($owner) {
3032                                         $pr->{'owner'} = to_utf8($owner);
3033                                 }
3034                                 push @list, $pr;
3035                         }
3036                 }
3037                 close $fd;
3038         }
3039         return @list;
3040 }
3041
3042 # written with help of Tree::Trie module (Perl Artistic License, GPL compatibile)
3043 # as side effects it sets 'forks' field to list of forks for forked projects
3044 sub filter_forks_from_projects_list {
3045         my $projects = shift;
3046
3047         my %trie; # prefix tree of directories (path components)
3048         # generate trie out of those directories that might contain forks
3049         foreach my $pr (@$projects) {
3050                 my $path = $pr->{'path'};
3051                 $path =~ s/\.git$//;      # forks of 'repo.git' are in 'repo/' directory
3052                 next if ($path =~ m!/$!); # skip non-bare repositories, e.g. 'repo/.git'
3053                 next unless ($path);      # skip '.git' repository: tests, git-instaweb
3054                 next unless (-d "$projectroot/$path"); # containing directory exists
3055                 $pr->{'forks'} = [];      # there can be 0 or more forks of project
3056
3057                 # add to trie
3058                 my @dirs = split('/', $path);
3059                 # walk the trie, until either runs out of components or out of trie
3060                 my $ref = \%trie;
3061                 while (scalar @dirs &&
3062                        exists($ref->{$dirs[0]})) {
3063                         $ref = $ref->{shift @dirs};
3064                 }
3065                 # create rest of trie structure from rest of components
3066                 foreach my $dir (@dirs) {
3067                         $ref = $ref->{$dir} = {};
3068                 }
3069                 # create end marker, store $pr as a data
3070                 $ref->{''} = $pr if (!exists $ref->{''});
3071         }
3072
3073         # filter out forks, by finding shortest prefix match for paths
3074         my @filtered;
3075  PROJECT:
3076         foreach my $pr (@$projects) {
3077                 # trie lookup
3078                 my $ref = \%trie;
3079         DIR:
3080                 foreach my $dir (split('/', $pr->{'path'})) {
3081                         if (exists $ref->{''}) {
3082                                 # found [shortest] prefix, is a fork - skip it
3083                                 push @{$ref->{''}{'forks'}}, $pr;
3084                                 next PROJECT;
3085                         }
3086                         if (!exists $ref->{$dir}) {
3087                                 # not in trie, cannot have prefix, not a fork
3088                                 push @filtered, $pr;
3089                                 next PROJECT;
3090                         }
3091                         # If the dir is there, we just walk one step down the trie.
3092                         $ref = $ref->{$dir};
3093                 }
3094                 # we ran out of trie
3095                 # (shouldn't happen: it's either no match, or end marker)
3096                 push @filtered, $pr;
3097         }
3098
3099         return @filtered;
3100 }
3101
3102 # note: fill_project_list_info must be run first,
3103 # for 'descr_long' and 'ctags' to be filled
3104 sub search_projects_list {
3105         my ($projlist, %opts) = @_;
3106         my $tagfilter  = $opts{'tagfilter'};
3107         my $search_re = $opts{'search_regexp'};
3108
3109         return @$projlist
3110                 unless ($tagfilter || $search_re);
3111
3112         # searching projects require filling to be run before it;
3113         fill_project_list_info($projlist,
3114                                $tagfilter  ? 'ctags' : (),
3115                                $search_re ? ('path', 'descr') : ());
3116         my @projects;
3117  PROJECT:
3118         foreach my $pr (@$projlist) {
3119
3120                 if ($tagfilter) {
3121                         next unless ref($pr->{'ctags'}) eq 'HASH';
3122                         next unless
3123                                 grep { lc($_) eq lc($tagfilter) } keys %{$pr->{'ctags'}};
3124                 }
3125
3126                 if ($search_re) {
3127                         next unless
3128                                 $pr->{'path'} =~ /$search_re/ ||
3129                                 $pr->{'descr_long'} =~ /$search_re/;
3130                 }
3131
3132                 push @projects, $pr;
3133         }
3134
3135         return @projects;
3136 }
3137
3138 our $gitweb_project_owner = undef;
3139 sub git_get_project_list_from_file {
3140
3141         return if (defined $gitweb_project_owner);
3142
3143         $gitweb_project_owner = {};
3144         # read from file (url-encoded):
3145         # 'git%2Fgit.git Linus+Torvalds'
3146         # 'libs%2Fklibc%2Fklibc.git H.+Peter+Anvin'
3147         # 'linux%2Fhotplug%2Fudev.git Greg+Kroah-Hartman'
3148         if (-f $projects_list) {
3149                 open(my $fd, '<', $projects_list);
3150                 while (my $line = <$fd>) {
3151                         chomp $line;
3152                         my ($pr, $ow) = split ' ', $line;
3153                         $pr = unescape($pr);
3154                         $ow = unescape($ow);
3155                         $gitweb_project_owner->{$pr} = to_utf8($ow);
3156                 }
3157                 close $fd;
3158         }
3159 }
3160
3161 sub git_get_project_owner {
3162         my $project = shift;
3163         my $owner;
3164
3165         return undef unless $project;
3166         $git_dir = "$projectroot/$project";
3167
3168         if (!defined $gitweb_project_owner) {
3169                 git_get_project_list_from_file();
3170         }
3171
3172         if (exists $gitweb_project_owner->{$project}) {
3173                 $owner = $gitweb_project_owner->{$project};
3174         }
3175         if (!defined $owner){
3176                 $owner = git_get_project_config('owner');
3177         }
3178         if (!defined $owner) {
3179                 $owner = get_file_owner("$git_dir");
3180         }
3181
3182         return $owner;
3183 }
3184
3185 sub git_get_last_activity {
3186         my ($path) = @_;
3187         my $fd;
3188
3189         $git_dir = "$projectroot/$path";
3190         open($fd, "-|", git_cmd(), 'for-each-ref',
3191              '--format=%(committer)',
3192              '--sort=-committerdate',
3193              '--count=1',
3194              'refs/heads') or return;
3195         my $most_recent = <$fd>;
3196         close $fd or return;
3197         if (defined $most_recent &&
3198             $most_recent =~ / (\d+) [-+][01]\d\d\d$/) {
3199                 my $timestamp = $1;
3200                 my $age = time - $timestamp;
3201                 return ($age, age_string($age));
3202         }
3203         return (undef, undef);
3204 }
3205
3206 # Implementation note: when a single remote is wanted, we cannot use 'git
3207 # remote show -n' because that command always work (assuming it's a remote URL
3208 # if it's not defined), and we cannot use 'git remote show' because that would
3209 # try to make a network roundtrip. So the only way to find if that particular
3210 # remote is defined is to walk the list provided by 'git remote -v' and stop if
3211 # and when we find what we want.
3212 sub git_get_remotes_list {
3213         my $wanted = shift;
3214         my %remotes = ();
3215
3216         open my $fd, '-|' , git_cmd(), 'remote', '-v';
3217         return unless $fd;
3218         while (my $remote = <$fd>) {
3219                 chomp $remote;
3220                 $remote =~ s!\t(.*?)\s+\((\w+)\)$!!;
3221                 next if $wanted and not $remote eq $wanted;
3222                 my ($url, $key) = ($1, $2);
3223
3224                 $remotes{$remote} ||= { 'heads' => () };
3225                 $remotes{$remote}{$key} = $url;
3226         }
3227         close $fd or return;
3228         return wantarray ? %remotes : \%remotes;
3229 }
3230
3231 # Takes a hash of remotes as first parameter and fills it by adding the
3232 # available remote heads for each of the indicated remotes.
3233 sub fill_remote_heads {
3234         my $remotes = shift;
3235         my @heads = map { "remotes/$_" } keys %$remotes;
3236         my @remoteheads = git_get_heads_list(undef, @heads);
3237         foreach my $remote (keys %$remotes) {
3238                 $remotes->{$remote}{'heads'} = [ grep {
3239                         $_->{'name'} =~ s!^$remote/!!
3240                         } @remoteheads ];
3241         }
3242 }
3243
3244 sub git_get_references {
3245         my $type = shift || "";
3246         my %refs;
3247         # 5dc01c595e6c6ec9ccda4f6f69c131c0dd945f8c refs/tags/v2.6.11
3248         # c39ae07f393806ccf406ef966e9a15afc43cc36a refs/tags/v2.6.11^{}
3249         open my $fd, "-|", git_cmd(), "show-ref", "--dereference",
3250                 ($type ? ("--", "refs/$type") : ()) # use -- <pattern> if $type
3251                 or return;
3252
3253         while (my $line = <$fd>) {
3254                 chomp $line;
3255                 if ($line =~ m!^([0-9a-fA-F]{40})\srefs/($type.*)$!) {
3256                         if (defined $refs{$1}) {
3257                                 push @{$refs{$1}}, $2;
3258                         } else {
3259                                 $refs{$1} = [ $2 ];
3260                         }
3261                 }
3262         }
3263         close $fd or return;
3264         return \%refs;
3265 }
3266
3267 sub git_get_rev_name_tags {
3268         my $hash = shift || return undef;
3269
3270         open my $fd, "-|", git_cmd(), "name-rev", "--tags", $hash
3271                 or return;
3272         my $name_rev = <$fd>;
3273         close $fd;
3274
3275         if ($name_rev =~ m|^$hash tags/(.*)$|) {
3276                 return $1;
3277         } else {
3278                 # catches also '$hash undefined' output
3279                 return undef;
3280         }
3281 }
3282
3283 ## ----------------------------------------------------------------------
3284 ## parse to hash functions
3285
3286 sub parse_date {
3287         my $epoch = shift;
3288         my $tz = shift || "-0000";
3289
3290         my %date;
3291         my @months = ("Jan", "Feb", "Mar", "Apr", "May", "Jun", "Jul", "Aug", "Sep", "Oct", "Nov", "Dec");
3292         my @days = ("Sun", "Mon", "Tue", "Wed", "Thu", "Fri", "Sat");
3293         my ($sec, $min, $hour, $mday, $mon, $year, $wday, $yday) = gmtime($epoch);
3294         $date{'hour'} = $hour;
3295         $date{'minute'} = $min;
3296         $date{'mday'} = $mday;
3297         $date{'day'} = $days[$wday];
3298         $date{'month'} = $months[$mon];
3299         $date{'rfc2822'}   = sprintf "%s, %d %s %4d %02d:%02d:%02d +0000",
3300                              $days[$wday], $mday, $months[$mon], 1900+$year, $hour ,$min, $sec;
3301         $date{'mday-time'} = sprintf "%d %s %02d:%02d",
3302                              $mday, $months[$mon], $hour ,$min;
3303         $date{'iso-8601'}  = sprintf "%04d-%02d-%02dT%02d:%02d:%02dZ",
3304                              1900+$year, 1+$mon, $mday, $hour ,$min, $sec;
3305
3306         my ($tz_sign, $tz_hour, $tz_min) =
3307                 ($tz =~ m/^([-+])(\d\d)(\d\d)$/);
3308         $tz_sign = ($tz_sign eq '-' ? -1 : +1);
3309         my $local = $epoch + $tz_sign*((($tz_hour*60) + $tz_min)*60);
3310         ($sec, $min, $hour, $mday, $mon, $year, $wday, $yday) = gmtime($local);
3311         $date{'hour_local'} = $hour;
3312         $date{'minute_local'} = $min;
3313         $date{'tz_local'} = $tz;
3314         $date{'iso-tz'} = sprintf("%04d-%02d-%02d %02d:%02d:%02d %s",
3315                                   1900+$year, $mon+1, $mday,
3316                                   $hour, $min, $sec, $tz);
3317         return %date;
3318 }
3319
3320 sub parse_tag {
3321         my $tag_id = shift;
3322         my %tag;
3323         my @comment;
3324
3325         open my $fd, "-|", git_cmd(), "cat-file", "tag", $tag_id or return;
3326         $tag{'id'} = $tag_id;
3327         while (my $line = <$fd>) {
3328                 chomp $line;
3329                 if ($line =~ m/^object ([0-9a-fA-F]{40})$/) {
3330                         $tag{'object'} = $1;
3331                 } elsif ($line =~ m/^type (.+)$/) {
3332                         $tag{'type'} = $1;
3333                 } elsif ($line =~ m/^tag (.+)$/) {
3334                         $tag{'name'} = $1;
3335                 } elsif ($line =~ m/^tagger (.*) ([0-9]+) (.*)$/) {
3336                         $tag{'author'} = $1;
3337                         $tag{'author_epoch'} = $2;
3338                         $tag{'author_tz'} = $3;
3339                         if ($tag{'author'} =~ m/^([^<]+) <([^>]*)>/) {
3340                                 $tag{'author_name'}  = $1;
3341                                 $tag{'author_email'} = $2;
3342                         } else {
3343                                 $tag{'author_name'} = $tag{'author'};
3344                         }
3345                 } elsif ($line =~ m/--BEGIN/) {
3346                         push @comment, $line;
3347                         last;
3348                 } elsif ($line eq "") {
3349                         last;
3350                 }
3351         }
3352         push @comment, <$fd>;
3353         $tag{'comment'} = \@comment;
3354         close $fd or return;
3355         if (!defined $tag{'name'}) {
3356                 return
3357         };
3358         return %tag
3359 }
3360
3361 sub parse_commit_text {
3362         my ($commit_text, $withparents) = @_;
3363         my @commit_lines = split '\n', $commit_text;
3364         my %co;
3365
3366         pop @commit_lines; # Remove '\0'
3367
3368         if (! @commit_lines) {
3369                 return;
3370         }
3371
3372         my $header = shift @commit_lines;
3373         if ($header !~ m/^[0-9a-fA-F]{40}/) {
3374                 return;
3375         }
3376         ($co{'id'}, my @parents) = split ' ', $header;
3377         while (my $line = shift @commit_lines) {
3378                 last if $line eq "\n";
3379                 if ($line =~ m/^tree ([0-9a-fA-F]{40})$/) {
3380                         $co{'tree'} = $1;
3381                 } elsif ((!defined $withparents) && ($line =~ m/^parent ([0-9a-fA-F]{40})$/)) {
3382                         push @parents, $1;
3383                 } elsif ($line =~ m/^author (.*) ([0-9]+) (.*)$/) {
3384                         $co{'author'} = to_utf8($1);
3385                         $co{'author_epoch'} = $2;
3386                         $co{'author_tz'} = $3;
3387                         if ($co{'author'} =~ m/^([^<]+) <([^>]*)>/) {
3388                                 $co{'author_name'}  = $1;
3389                                 $co{'author_email'} = $2;
3390                         } else {
3391                                 $co{'author_name'} = $co{'author'};
3392                         }
3393                 } elsif ($line =~ m/^committer (.*) ([0-9]+) (.*)$/) {
3394                         $co{'committer'} = to_utf8($1);
3395                         $co{'committer_epoch'} = $2;
3396                         $co{'committer_tz'} = $3;
3397                         if ($co{'committer'} =~ m/^([^<]+) <([^>]*)>/) {
3398                                 $co{'committer_name'}  = $1;
3399                                 $co{'committer_email'} = $2;
3400                         } else {
3401                                 $co{'committer_name'} = $co{'committer'};
3402                         }
3403                 }
3404         }
3405         if (!defined $co{'tree'}) {
3406                 return;
3407         };
3408         $co{'parents'} = \@parents;
3409         $co{'parent'} = $parents[0];
3410
3411         foreach my $title (@commit_lines) {
3412                 $title =~ s/^    //;
3413                 if ($title ne "") {
3414                         $co{'title'} = chop_str($title, 80, 5);
3415                         # remove leading stuff of merges to make the interesting part visible
3416                         if (length($title) > 50) {
3417                                 $title =~ s/^Automatic //;
3418                                 $title =~ s/^merge (of|with) /Merge ... /i;
3419                                 if (length($title) > 50) {
3420                                         $title =~ s/(http|rsync):\/\///;
3421                                 }
3422                                 if (length($title) > 50) {
3423                                         $title =~ s/(master|www|rsync)\.//;
3424                                 }
3425                                 if (length($title) > 50) {
3426                                         $title =~ s/kernel.org:?//;
3427                                 }
3428                                 if (length($title) > 50) {
3429                                         $title =~ s/\/pub\/scm//;
3430                                 }
3431                         }
3432                         $co{'title_short'} = chop_str($title, 50, 5);
3433                         last;
3434                 }
3435         }
3436         if (! defined $co{'title'} || $co{'title'} eq "") {
3437                 $co{'title'} = $co{'title_short'} = '(no commit message)';
3438         }
3439         # remove added spaces
3440         foreach my $line (@commit_lines) {
3441                 $line =~ s/^    //;
3442         }
3443         $co{'comment'} = \@commit_lines;
3444
3445         my $age = time - $co{'committer_epoch'};
3446         $co{'age'} = $age;
3447         $co{'age_string'} = age_string($age);
3448         my ($sec, $min, $hour, $mday, $mon, $year, $wday, $yday) = gmtime($co{'committer_epoch'});
3449         if ($age > 60*60*24*7*2) {
3450                 $co{'age_string_date'} = sprintf "%4i-%02u-%02i", 1900 + $year, $mon+1, $mday;
3451                 $co{'age_string_age'} = $co{'age_string'};
3452         } else {
3453                 $co{'age_string_date'} = $co{'age_string'};
3454                 $co{'age_string_age'} = sprintf "%4i-%02u-%02i", 1900 + $year, $mon+1, $mday;
3455         }
3456         return %co;
3457 }
3458
3459 sub parse_commit {
3460         my ($commit_id) = @_;
3461         my %co;
3462
3463         local $/ = "\0";
3464
3465         open my $fd, "-|", git_cmd(), "rev-list",
3466                 "--parents",
3467                 "--header",
3468                 "--max-count=1",
3469                 $commit_id,
3470                 "--",
3471                 or die_error(500, "Open git-rev-list failed");
3472         %co = parse_commit_text(<$fd>, 1);
3473         close $fd;
3474
3475         return %co;
3476 }
3477
3478 sub parse_commits {
3479         my ($commit_id, $maxcount, $skip, $filename, @args) = @_;
3480         my @cos;
3481
3482         $maxcount ||= 1;
3483         $skip ||= 0;
3484
3485         local $/ = "\0";
3486
3487         open my $fd, "-|", git_cmd(), "rev-list",
3488                 "--header",
3489                 @args,
3490                 ("--max-count=" . $maxcount),
3491                 ("--skip=" . $skip),
3492                 @extra_options,
3493                 $commit_id,
3494                 "--",
3495                 ($filename ? ($filename) : ())
3496                 or die_error(500, "Open git-rev-list failed");
3497         while (my $line = <$fd>) {
3498                 my %co = parse_commit_text($line);
3499                 push @cos, \%co;
3500         }
3501         close $fd;
3502
3503         return wantarray ? @cos : \@cos;
3504 }
3505
3506 # parse line of git-diff-tree "raw" output
3507 sub parse_difftree_raw_line {
3508         my $line = shift;
3509         my %res;
3510
3511         # ':100644 100644 03b218260e99b78c6df0ed378e59ed9205ccc96d 3b93d5e7cc7f7dd4ebed13a5cc1a4ad976fc94d8 M   ls-files.c'
3512         # ':100644 100644 7f9281985086971d3877aca27704f2aaf9c448ce bc190ebc71bbd923f2b728e505408f5e54bd073a M   rev-tree.c'
3513         if ($line =~ m/^:([0-7]{6}) ([0-7]{6}) ([0-9a-fA-F]{40}) ([0-9a-fA-F]{40}) (.)([0-9]{0,3})\t(.*)$/) {
3514                 $res{'from_mode'} = $1;
3515                 $res{'to_mode'} = $2;
3516                 $res{'from_id'} = $3;
3517                 $res{'to_id'} = $4;
3518                 $res{'status'} = $5;
3519                 $res{'similarity'} = $6;
3520                 if ($res{'status'} eq 'R' || $res{'status'} eq 'C') { # renamed or copied
3521                         ($res{'from_file'}, $res{'to_file'}) = map { unquote($_) } split("\t", $7);
3522                 } else {
3523                         $res{'from_file'} = $res{'to_file'} = $res{'file'} = unquote($7);
3524                 }
3525         }
3526         # '::100755 100755 100755 60e79ca1b01bc8b057abe17ddab484699a7f5fdb 94067cc5f73388f33722d52ae02f44692bc07490 94067cc5f73388f33722d52ae02f44692bc07490 MR git-gui/git-gui.sh'
3527         # combined diff (for merge commit)
3528         elsif ($line =~ s/^(::+)((?:[0-7]{6} )+)((?:[0-9a-fA-F]{40} )+)([a-zA-Z]+)\t(.*)$//) {
3529                 $res{'nparents'}  = length($1);
3530                 $res{'from_mode'} = [ split(' ', $2) ];
3531                 $res{'to_mode'} = pop @{$res{'from_mode'}};
3532                 $res{'from_id'} = [ split(' ', $3) ];
3533                 $res{'to_id'} = pop @{$res{'from_id'}};
3534                 $res{'status'} = [ split('', $4) ];
3535                 $res{'to_file'} = unquote($5);
3536         }
3537         # 'c512b523472485aef4fff9e57b229d9d243c967f'
3538         elsif ($line =~ m/^([0-9a-fA-F]{40})$/) {
3539                 $res{'commit'} = $1;
3540         }
3541
3542         return wantarray ? %res : \%res;
3543 }
3544
3545 # wrapper: return parsed line of git-diff-tree "raw" output
3546 # (the argument might be raw line, or parsed info)
3547 sub parsed_difftree_line {
3548         my $line_or_ref = shift;
3549
3550         if (ref($line_or_ref) eq "HASH") {
3551                 # pre-parsed (or generated by hand)
3552                 return $line_or_ref;
3553         } else {
3554                 return parse_difftree_raw_line($line_or_ref);
3555         }
3556 }
3557
3558 # parse line of git-ls-tree output
3559 sub parse_ls_tree_line {
3560         my $line = shift;
3561         my %opts = @_;
3562         my %res;
3563
3564         if ($opts{'-l'}) {
3565                 #'100644 blob 0fa3f3a66fb6a137f6ec2c19351ed4d807070ffa   16717  panic.c'
3566                 $line =~ m/^([0-9]+) (.+) ([0-9a-fA-F]{40}) +(-|[0-9]+)\t(.+)$/s;
3567
3568                 $res{'mode'} = $1;
3569                 $res{'type'} = $2;
3570                 $res{'hash'} = $3;
3571                 $res{'size'} = $4;
3572                 if ($opts{'-z'}) {
3573                         $res{'name'} = $5;
3574                 } else {
3575                         $res{'name'} = unquote($5);
3576                 }
3577         } else {
3578                 #'100644 blob 0fa3f3a66fb6a137f6ec2c19351ed4d807070ffa  panic.c'
3579                 $line =~ m/^([0-9]+) (.+) ([0-9a-fA-F]{40})\t(.+)$/s;
3580
3581                 $res{'mode'} = $1;
3582                 $res{'type'} = $2;
3583                 $res{'hash'} = $3;
3584                 if ($opts{'-z'}) {
3585                         $res{'name'} = $4;
3586                 } else {
3587                         $res{'name'} = unquote($4);
3588                 }
3589         }
3590
3591         return wantarray ? %res : \%res;
3592 }
3593
3594 # generates _two_ hashes, references to which are passed as 2 and 3 argument
3595 sub parse_from_to_diffinfo {
3596         my ($diffinfo, $from, $to, @parents) = @_;
3597
3598         if ($diffinfo->{'nparents'}) {
3599                 # combined diff
3600                 $from->{'file'} = [];
3601                 $from->{'href'} = [];
3602                 fill_from_file_info($diffinfo, @parents)
3603                         unless exists $diffinfo->{'from_file'};
3604                 for (my $i = 0; $i < $diffinfo->{'nparents'}; $i++) {
3605                         $from->{'file'}[$i] =
3606                                 defined $diffinfo->{'from_file'}[$i] ?
3607                                         $diffinfo->{'from_file'}[$i] :
3608                                         $diffinfo->{'to_file'};
3609                         if ($diffinfo->{'status'}[$i] ne "A") { # not new (added) file
3610                                 $from->{'href'}[$i] = href(action=>"blob",
3611                                                            hash_base=>$parents[$i],
3612                                                            hash=>$diffinfo->{'from_id'}[$i],
3613                                                            file_name=>$from->{'file'}[$i]);
3614                         } else {
3615                                 $from->{'href'}[$i] = undef;
3616                         }
3617                 }
3618         } else {
3619                 # ordinary (not combined) diff
3620                 $from->{'file'} = $diffinfo->{'from_file'};
3621                 if ($diffinfo->{'status'} ne "A") { # not new (added) file
3622                         $from->{'href'} = href(action=>"blob", hash_base=>$hash_parent,
3623                                                hash=>$diffinfo->{'from_id'},
3624                                                file_name=>$from->{'file'});
3625                 } else {
3626                         delete $from->{'href'};
3627                 }
3628         }
3629
3630         $to->{'file'} = $diffinfo->{'to_file'};
3631         if (!is_deleted($diffinfo)) { # file exists in result
3632                 $to->{'href'} = href(action=>"blob", hash_base=>$hash,
3633                                      hash=>$diffinfo->{'to_id'},
3634                                      file_name=>$to->{'file'});
3635         } else {
3636                 delete $to->{'href'};
3637         }
3638 }
3639
3640 ## ......................................................................
3641 ## parse to array of hashes functions
3642
3643 sub git_get_heads_list {
3644         my ($limit, @classes) = @_;
3645         @classes = ('heads') unless @classes;
3646         my @patterns = map { "refs/$_" } @classes;
3647         my @headslist;
3648
3649         open my $fd, '-|', git_cmd(), 'for-each-ref',
3650                 ($limit ? '--count='.($limit+1) : ()), '--sort=-committerdate',
3651                 '--format=%(objectname) %(refname) %(subject)%00%(committer)',
3652                 @patterns
3653                 or return;
3654         while (my $line = <$fd>) {
3655                 my %ref_item;
3656
3657                 chomp $line;
3658                 my ($refinfo, $committerinfo) = split(/\0/, $line);
3659                 my ($hash, $name, $title) = split(' ', $refinfo, 3);
3660                 my ($committer, $epoch, $tz) =
3661                         ($committerinfo =~ /^(.*) ([0-9]+) (.*)$/);
3662                 $ref_item{'fullname'}  = $name;
3663                 $name =~ s!^refs/(?:head|remote)s/!!;
3664
3665                 $ref_item{'name'}  = $name;
3666                 $ref_item{'id'}    = $hash;
3667                 $ref_item{'title'} = $title || '(no commit message)';
3668                 $ref_item{'epoch'} = $epoch;
3669                 if ($epoch) {
3670                         $ref_item{'age'} = age_string(time - $ref_item{'epoch'});
3671                 } else {
3672                         $ref_item{'age'} = "unknown";
3673                 }
3674
3675                 push @headslist, \%ref_item;
3676         }
3677         close $fd;
3678
3679         return wantarray ? @headslist : \@headslist;
3680 }
3681
3682 sub git_get_tags_list {
3683         my $limit = shift;
3684         my @tagslist;
3685
3686         open my $fd, '-|', git_cmd(), 'for-each-ref',
3687                 ($limit ? '--count='.($limit+1) : ()), '--sort=-creatordate',
3688                 '--format=%(objectname) %(objecttype) %(refname) '.
3689                 '%(*objectname) %(*objecttype) %(subject)%00%(creator)',
3690                 'refs/tags'
3691                 or return;
3692         while (my $line = <$fd>) {
3693                 my %ref_item;
3694
3695                 chomp $line;
3696                 my ($refinfo, $creatorinfo) = split(/\0/, $line);
3697                 my ($id, $type, $name, $refid, $reftype, $title) = split(' ', $refinfo, 6);
3698                 my ($creator, $epoch, $tz) =
3699                         ($creatorinfo =~ /^(.*) ([0-9]+) (.*)$/);
3700                 $ref_item{'fullname'} = $name;
3701                 $name =~ s!^refs/tags/!!;
3702
3703                 $ref_item{'type'} = $type;
3704                 $ref_item{'id'} = $id;
3705                 $ref_item{'name'} = $name;
3706                 if ($type eq "tag") {
3707                         $ref_item{'subject'} = $title;
3708                         $ref_item{'reftype'} = $reftype;
3709                         $ref_item{'refid'}   = $refid;
3710                 } else {
3711                         $ref_item{'reftype'} = $type;
3712                         $ref_item{'refid'}   = $id;
3713                 }
3714
3715                 if ($type eq "tag" || $type eq "commit") {
3716                         $ref_item{'epoch'} = $epoch;
3717                         if ($epoch) {
3718                                 $ref_item{'age'} = age_string(time - $ref_item{'epoch'});
3719                         } else {
3720                                 $ref_item{'age'} = "unknown";
3721                         }
3722                 }
3723
3724                 push @tagslist, \%ref_item;
3725         }
3726         close $fd;
3727
3728         return wantarray ? @tagslist : \@tagslist;
3729 }
3730
3731 ## ----------------------------------------------------------------------
3732 ## filesystem-related functions
3733
3734 sub get_file_owner {
3735         my $path = shift;
3736
3737         my ($dev, $ino, $mode, $nlink, $st_uid, $st_gid, $rdev, $size) = stat($path);
3738         my ($name, $passwd, $uid, $gid, $quota, $comment, $gcos, $dir, $shell) = getpwuid($st_uid);
3739         if (!defined $gcos) {
3740                 return undef;
3741         }
3742         my $owner = $gcos;
3743         $owner =~ s/[,;].*$//;
3744         return to_utf8($owner);
3745 }
3746
3747 # assume that file exists
3748 sub insert_file {
3749         my $filename = shift;
3750
3751         open my $fd, '<', $filename;
3752         print map { to_utf8($_) } <$fd>;
3753         close $fd;
3754 }
3755
3756 ## ......................................................................
3757 ## mimetype related functions
3758
3759 sub mimetype_guess_file {
3760         my $filename = shift;
3761         my $mimemap = shift;
3762         -r $mimemap or return undef;
3763
3764         my %mimemap;
3765         open(my $mh, '<', $mimemap) or return undef;
3766         while (<$mh>) {
3767                 next if m/^#/; # skip comments
3768                 my ($mimetype, @exts) = split(/\s+/);
3769                 foreach my $ext (@exts) {
3770                         $mimemap{$ext} = $mimetype;
3771                 }
3772         }
3773         close($mh);
3774
3775         $filename =~ /\.([^.]*)$/;
3776         return $mimemap{$1};
3777 }
3778
3779 sub mimetype_guess {
3780         my $filename = shift;
3781         my $mime;
3782         $filename =~ /\./ or return undef;
3783
3784         if ($mimetypes_file) {
3785                 my $file = $mimetypes_file;
3786                 if ($file !~ m!^/!) { # if it is relative path
3787                         # it is relative to project
3788                         $file = "$projectroot/$project/$file";
3789                 }
3790                 $mime = mimetype_guess_file($filename, $file);
3791         }
3792         $mime ||= mimetype_guess_file($filename, '/etc/mime.types');
3793         return $mime;
3794 }
3795
3796 sub blob_mimetype {
3797         my $fd = shift;
3798         my $filename = shift;
3799
3800         if ($filename) {
3801                 my $mime = mimetype_guess($filename);
3802                 $mime and return $mime;
3803         }
3804
3805         # just in case
3806         return $default_blob_plain_mimetype unless $fd;
3807
3808         if (-T $fd) {
3809                 return 'text/plain';
3810         } elsif (! $filename) {
3811                 return 'application/octet-stream';
3812         } elsif ($filename =~ m/\.png$/i) {
3813                 return 'image/png';
3814         } elsif ($filename =~ m/\.gif$/i) {
3815                 return 'image/gif';
3816         } elsif ($filename =~ m/\.jpe?g$/i) {
3817                 return 'image/jpeg';
3818         } else {
3819                 return 'application/octet-stream';
3820         }
3821 }
3822
3823 sub blob_contenttype {
3824         my ($fd, $file_name, $type) = @_;
3825
3826         $type ||= blob_mimetype($fd, $file_name);
3827         if ($type eq 'text/plain' && defined $default_text_plain_charset) {
3828                 $type .= "; charset=$default_text_plain_charset";
3829         }
3830
3831         return $type;
3832 }
3833
3834 # guess file syntax for syntax highlighting; return undef if no highlighting
3835 # the name of syntax can (in the future) depend on syntax highlighter used
3836 sub guess_file_syntax {
3837         my ($highlight, $mimetype, $file_name) = @_;
3838         return undef unless ($highlight && defined $file_name);
3839         my $basename = basename($file_name, '.in');
3840         return $highlight_basename{$basename}
3841                 if exists $highlight_basename{$basename};
3842
3843         $basename =~ /\.([^.]*)$/;
3844         my $ext = $1 or return undef;
3845         return $highlight_ext{$ext}
3846                 if exists $highlight_ext{$ext};
3847
3848         return undef;
3849 }
3850
3851 # run highlighter and return FD of its output,
3852 # or return original FD if no highlighting
3853 sub run_highlighter {
3854         my ($fd, $highlight, $syntax) = @_;
3855         return $fd unless ($highlight && defined $syntax);
3856
3857         close $fd;
3858         open $fd, quote_command(git_cmd(), "cat-file", "blob", $hash)." | ".
3859                   quote_command($highlight_bin).
3860                   " --replace-tabs=8 --fragment --syntax $syntax |"
3861                 or die_error(500, "Couldn't open file or run syntax highlighter");
3862         return $fd;
3863 }
3864
3865 ## ======================================================================
3866 ## functions printing HTML: header, footer, error page
3867
3868 sub get_page_title {
3869         my $title = to_utf8($site_name);
3870
3871         unless (defined $project) {
3872                 if (defined $project_filter) {
3873                         $title .= " - projects in '" . esc_path($project_filter) . "'";
3874                 }
3875                 return $title;
3876         }
3877         $title .= " - " . to_utf8($project);
3878
3879         return $title unless (defined $action);
3880         $title .= "/$action"; # $action is US-ASCII (7bit ASCII)
3881
3882         return $title unless (defined $file_name);
3883         $title .= " - " . esc_path($file_name);
3884         if ($action eq "tree" && $file_name !~ m|/$|) {
3885                 $title .= "/";
3886         }
3887
3888         return $title;
3889 }
3890
3891 sub get_content_type_html {
3892         # require explicit support from the UA if we are to send the page as
3893         # 'application/xhtml+xml', otherwise send it as plain old 'text/html'.
3894         # we have to do this because MSIE sometimes globs '*/*', pretending to
3895         # support xhtml+xml but choking when it gets what it asked for.
3896         if (defined $cgi->http('HTTP_ACCEPT') &&
3897             $cgi->http('HTTP_ACCEPT') =~ m/(,|;|\s|^)application\/xhtml\+xml(,|;|\s|$)/ &&
3898             $cgi->Accept('application/xhtml+xml') != 0) {
3899                 return 'application/xhtml+xml';
3900         } else {
3901                 return 'text/html';
3902         }
3903 }
3904
3905 sub print_feed_meta {
3906         if (defined $project) {
3907                 my %href_params = get_feed_info();
3908                 if (!exists $href_params{'-title'}) {
3909                         $href_params{'-title'} = 'log';
3910                 }
3911
3912                 foreach my $format (qw(RSS Atom)) {
3913                         my $type = lc($format);
3914                         my %link_attr = (
3915                                 '-rel' => 'alternate',
3916                                 '-title' => esc_attr("$project - $href_params{'-title'} - $format feed"),
3917                                 '-type' => "application/$type+xml"
3918                         );
3919
3920                         $href_params{'extra_options'} = undef;
3921                         $href_params{'action'} = $type;
3922                         $link_attr{'-href'} = href(%href_params);
3923                         print "<link ".
3924                               "rel=\"$link_attr{'-rel'}\" ".
3925                               "title=\"$link_attr{'-title'}\" ".
3926                               "href=\"$link_attr{'-href'}\" ".
3927                               "type=\"$link_attr{'-type'}\" ".
3928                               "/>\n";
3929
3930                         $href_params{'extra_options'} = '--no-merges';
3931                         $link_attr{'-href'} = href(%href_params);
3932                         $link_attr{'-title'} .= ' (no merges)';
3933                         print "<link ".
3934                               "rel=\"$link_attr{'-rel'}\" ".
3935                               "title=\"$link_attr{'-title'}\" ".
3936                               "href=\"$link_attr{'-href'}\" ".
3937                               "type=\"$link_attr{'-type'}\" ".
3938                               "/>\n";
3939                 }
3940
3941         } else {
3942                 printf('<link rel="alternate" title="%s projects list" '.
3943                        'href="%s" type="text/plain; charset=utf-8" />'."\n",
3944                        esc_attr($site_name), href(project=>undef, action=>"project_index"));
3945                 printf('<link rel="alternate" title="%s projects feeds" '.
3946                        'href="%s" type="text/x-opml" />'."\n",
3947                        esc_attr($site_name), href(project=>undef, action=>"opml"));
3948         }
3949 }
3950
3951 sub print_header_links {
3952         my $status = shift;
3953
3954         # print out each stylesheet that exist, providing backwards capability
3955         # for those people who defined $stylesheet in a config file
3956         if (defined $stylesheet) {
3957                 print '<link rel="stylesheet" type="text/css" href="'.esc_url($stylesheet).'"/>'."\n";
3958         } else {
3959                 foreach my $stylesheet (@stylesheets) {
3960                         next unless $stylesheet;
3961                         print '<link rel="stylesheet" type="text/css" href="'.esc_url($stylesheet).'"/>'."\n";
3962                 }
3963         }
3964         print_feed_meta()
3965                 if ($status eq '200 OK');
3966         if (defined $favicon) {
3967                 print qq(<link rel="shortcut icon" href=").esc_url($favicon).qq(" type="image/png" />\n);
3968         }
3969 }
3970
3971 sub print_nav_breadcrumbs_path {
3972         my $dirprefix = undef;
3973         while (my $part = shift) {
3974                 $dirprefix .= "/" if defined $dirprefix;
3975                 $dirprefix .= $part;
3976                 print $cgi->a({-href => href(project => undef,
3977                                              project_filter => $dirprefix,
3978                                              action => "project_list")},
3979                               esc_html($part)) . " / ";
3980         }
3981 }
3982
3983 sub print_nav_breadcrumbs {
3984         my %opts = @_;
3985
3986         print $cgi->a({-href => esc_url($home_link)}, $home_link_str) . " / ";
3987         if (defined $project) {
3988                 my @dirname = split '/', $project;
3989                 my $projectbasename = pop @dirname;
3990                 print_nav_breadcrumbs_path(@dirname);
3991                 print $cgi->a({-href => href(action=>"summary")}, esc_html($projectbasename));
3992                 if (defined $action) {
3993                         my $action_print = $action ;
3994                         if (defined $opts{-action_extra}) {
3995                                 $action_print = $cgi->a({-href => href(action=>$action)},
3996                                         $action);
3997                         }
3998                         print " / $action_print";
3999                 }
4000                 if (defined $opts{-action_extra}) {
4001                         print " / $opts{-action_extra}";
4002                 }
4003                 print "\n";
4004         } elsif (defined $project_filter) {
4005                 print_nav_breadcrumbs_path(split '/', $project_filter);
4006         }
4007 }
4008
4009 sub print_search_form {
4010         if (!defined $searchtext) {
4011                 $searchtext = "";
4012         }
4013         my $search_hash;
4014         if (defined $hash_base) {
4015                 $search_hash = $hash_base;
4016         } elsif (defined $hash) {
4017                 $search_hash = $hash;
4018         } else {
4019                 $search_hash = "HEAD";
4020         }
4021         my $action = $my_uri;
4022         my $use_pathinfo = gitweb_check_feature('pathinfo');
4023         if ($use_pathinfo) {
4024                 $action .= "/".esc_url($project);
4025         }
4026         print $cgi->startform(-method => "get", -action => $action) .
4027               "<div class=\"search\">\n" .
4028               (!$use_pathinfo &&
4029               $cgi->input({-name=>"p", -value=>$project, -type=>"hidden"}) . "\n") .
4030               $cgi->input({-name=>"a", -value=>"search", -type=>"hidden"}) . "\n" .
4031               $cgi->input({-name=>"h", -value=>$search_hash, -type=>"hidden"}) . "\n" .
4032               $cgi->popup_menu(-name => 'st', -default => 'commit',
4033                                -values => ['commit', 'grep', 'author', 'committer', 'pickaxe']) .
4034               $cgi->sup($cgi->a({-href => href(action=>"search_help")}, "?")) .
4035               " search:\n",
4036               $cgi->textfield(-name => "s", -value => $searchtext, -override => 1) . "\n" .
4037               "<span title=\"Extended regular expression\">" .
4038               $cgi->checkbox(-name => 'sr', -value => 1, -label => 're',
4039                              -checked => $search_use_regexp) .
4040               "</span>" .
4041               "</div>" .
4042               $cgi->end_form() . "\n";
4043 }
4044
4045 sub git_header_html {
4046         my $status = shift || "200 OK";
4047         my $expires = shift;
4048         my %opts = @_;
4049
4050         my $title = get_page_title();
4051         my $content_type = get_content_type_html();
4052         print $cgi->header(-type=>$content_type, -charset => 'utf-8',
4053                            -status=> $status, -expires => $expires)
4054                 unless ($opts{'-no_http_header'});
4055         my $mod_perl_version = $ENV{'MOD_PERL'} ? " $ENV{'MOD_PERL'}" : '';
4056         print <<EOF;
4057 <?xml version="1.0" encoding="utf-8"?>
4058 <!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Strict//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-strict.dtd">
4059 <html xmlns="http://www.w3.org/1999/xhtml" xml:lang="en-US" lang="en-US">
4060 <!-- git web interface version $version, (C) 2005-2006, Kay Sievers <kay.sievers\@vrfy.org>, Christian Gierke -->
4061 <!-- git core binaries version $git_version -->
4062 <head>
4063 <meta http-equiv="content-type" content="$content_type; charset=utf-8"/>
4064 <meta name="generator" content="gitweb/$version git/$git_version$mod_perl_version"/>
4065 <meta name="robots" content="index, nofollow"/>
4066 <title>$title</title>
4067 EOF
4068         # the stylesheet, favicon etc urls won't work correctly with path_info
4069         # unless we set the appropriate base URL
4070         if ($ENV{'PATH_INFO'}) {
4071                 print "<base href=\"".esc_url($base_url)."\" />\n";
4072         }
4073         print_header_links($status);
4074
4075         if (defined $site_html_head_string) {
4076                 print to_utf8($site_html_head_string);
4077         }
4078
4079         print "</head>\n" .
4080               "<body>\n";
4081
4082         if (defined $site_header && -f $site_header) {
4083                 insert_file($site_header);
4084         }
4085
4086         print "<div class=\"page_header\">\n";
4087         if (defined $logo) {
4088                 print $cgi->a({-href => esc_url($logo_url),
4089                                -title => $logo_label},
4090                               $cgi->img({-src => esc_url($logo),
4091                                          -width => 72, -height => 27,
4092                                          -alt => "git",
4093                                          -class => "logo"}));
4094         }
4095         print_nav_breadcrumbs(%opts);
4096         print "</div>\n";
4097
4098         my $have_search = gitweb_check_feature('search');
4099         if (defined $project && $have_search) {
4100                 print_search_form();
4101         }
4102 }
4103
4104 sub git_footer_html {
4105         my $feed_class = 'rss_logo';
4106
4107         print "<div class=\"page_footer\">\n";
4108         if (defined $project) {
4109                 my $descr = git_get_project_description($project);
4110                 if (defined $descr) {
4111                         print "<div class=\"page_footer_text\">" . esc_html($descr) . "</div>\n";
4112                 }
4113
4114                 my %href_params = get_feed_info();
4115                 if (!%href_params) {
4116                         $feed_class .= ' generic';
4117                 }
4118                 $href_params{'-title'} ||= 'log';
4119
4120                 foreach my $format (qw(RSS Atom)) {
4121                         $href_params{'action'} = lc($format);
4122                         print $cgi->a({-href => href(%href_params),
4123                                       -title => "$href_params{'-title'} $format feed",
4124                                       -class => $feed_class}, $format)."\n";
4125                 }
4126
4127         } else {
4128                 print $cgi->a({-href => href(project=>undef, action=>"opml",
4129                                              project_filter => $project_filter),
4130                               -class => $feed_class}, "OPML") . " ";
4131                 print $cgi->a({-href => href(project=>undef, action=>"project_index",
4132                                              project_filter => $project_filter),
4133                               -class => $feed_class}, "TXT") . "\n";
4134         }
4135         print "</div>\n"; # class="page_footer"
4136
4137         if (defined $t0 && gitweb_check_feature('timed')) {
4138                 print "<div id=\"generating_info\">\n";
4139                 print 'This page took '.
4140                       '<span id="generating_time" class="time_span">'.
4141                       tv_interval($t0, [ gettimeofday() ]).
4142                       ' seconds </span>'.
4143                       ' and '.
4144                       '<span id="generating_cmd">'.
4145                       $number_of_git_cmds.
4146                       '</span> git commands '.
4147                       " to generate.\n";
4148                 print "</div>\n"; # class="page_footer"
4149         }
4150
4151         if (defined $site_footer && -f $site_footer) {
4152                 insert_file($site_footer);
4153         }
4154
4155         print qq!<script type="text/javascript" src="!.esc_url($javascript).qq!"></script>\n!;
4156         if (defined $action &&
4157             $action eq 'blame_incremental') {
4158                 print qq!<script type="text/javascript">\n!.
4159                       qq!startBlame("!. href(action=>"blame_data", -replay=>1) .qq!",\n!.
4160                       qq!           "!. href() .qq!");\n!.
4161                       qq!</script>\n!;
4162         } else {
4163                 my ($jstimezone, $tz_cookie, $datetime_class) =
4164                         gitweb_get_feature('javascript-timezone');
4165
4166                 print qq!<script type="text/javascript">\n!.
4167                       qq!window.onload = function () {\n!;
4168                 if (gitweb_check_feature('javascript-actions')) {
4169                         print qq!       fixLinks();\n!;
4170                 }
4171                 if ($jstimezone && $tz_cookie && $datetime_class) {
4172                         print qq!       var tz_cookie = { name: '$tz_cookie', expires: 14, path: '/' };\n!. # in days
4173                               qq!       onloadTZSetup('$jstimezone', tz_cookie, '$datetime_class');\n!;
4174                 }
4175                 print qq!};\n!.
4176                       qq!</script>\n!;
4177         }
4178
4179         print "</body>\n" .
4180               "</html>";
4181 }
4182
4183 # die_error(<http_status_code>, <error_message>[, <detailed_html_description>])
4184 # Example: die_error(404, 'Hash not found')
4185 # By convention, use the following status codes (as defined in RFC 2616):
4186 # 400: Invalid or missing CGI parameters, or
4187 #      requested object exists but has wrong type.
4188 # 403: Requested feature (like "pickaxe" or "snapshot") not enabled on
4189 #      this server or project.
4190 # 404: Requested object/revision/project doesn't exist.
4191 # 500: The server isn't configured properly, or
4192 #      an internal error occurred (e.g. failed assertions caused by bugs), or
4193 #      an unknown error occurred (e.g. the git binary died unexpectedly).
4194 # 503: The server is currently unavailable (because it is overloaded,
4195 #      or down for maintenance).  Generally, this is a temporary state.
4196 sub die_error {
4197         my $status = shift || 500;
4198         my $error = esc_html(shift) || "Internal Server Error";
4199         my $extra = shift;
4200         my %opts = @_;
4201
4202         my %http_responses = (
4203                 400 => '400 Bad Request',
4204                 403 => '403 Forbidden',
4205                 404 => '404 Not Found',
4206                 500 => '500 Internal Server Error',
4207                 503 => '503 Service Unavailable',
4208         );
4209         git_header_html($http_responses{$status}, undef, %opts);
4210         print <<EOF;
4211 <div class="page_body">
4212 <br /><br />
4213 $status - $error
4214 <br />
4215 EOF
4216         if (defined $extra) {
4217                 print "<hr />\n" .
4218                       "$extra\n";
4219         }
4220         print "</div>\n";
4221
4222         git_footer_html();
4223         goto DONE_GITWEB
4224                 unless ($opts{'-error_handler'});
4225 }
4226
4227 ## ----------------------------------------------------------------------
4228 ## functions printing or outputting HTML: navigation
4229
4230 sub git_print_page_nav {
4231         my ($current, $suppress, $head, $treehead, $treebase, $extra) = @_;
4232         $extra = '' if !defined $extra; # pager or formats
4233
4234         my @navs = qw(summary shortlog log commit commitdiff tree);
4235         if ($suppress) {
4236                 @navs = grep { $_ ne $suppress } @navs;
4237         }
4238
4239         my %arg = map { $_ => {action=>$_} } @navs;
4240         if (defined $head) {
4241                 for (qw(commit commitdiff)) {
4242                         $arg{$_}{'hash'} = $head;
4243                 }
4244                 if ($current =~ m/^(tree | log | shortlog | commit | commitdiff | search)$/x) {
4245                         for (qw(shortlog log)) {
4246                                 $arg{$_}{'hash'} = $head;
4247                         }
4248                 }
4249         }
4250
4251         $arg{'tree'}{'hash'} = $treehead if defined $treehead;
4252         $arg{'tree'}{'hash_base'} = $treebase if defined $treebase;
4253
4254         my @actions = gitweb_get_feature('actions');
4255         my %repl = (
4256                 '%' => '%',
4257                 'n' => $project,         # project name
4258                 'f' => $git_dir,         # project path within filesystem
4259                 'h' => $treehead || '',  # current hash ('h' parameter)
4260                 'b' => $treebase || '',  # hash base ('hb' parameter)
4261         );
4262         while (@actions) {
4263                 my ($label, $link, $pos) = splice(@actions,0,3);
4264                 # insert
4265                 @navs = map { $_ eq $pos ? ($_, $label) : $_ } @navs;
4266                 # munch munch
4267                 $link =~ s/%([%nfhb])/$repl{$1}/g;
4268                 $arg{$label}{'_href'} = $link;
4269         }
4270
4271         print "<div class=\"page_nav\">\n" .
4272                 (join " | ",
4273                  map { $_ eq $current ?
4274                        $_ : $cgi->a({-href => ($arg{$_}{_href} ? $arg{$_}{_href} : href(%{$arg{$_}}))}, "$_")
4275                  } @navs);
4276         print "<br/>\n$extra<br/>\n" .
4277               "</div>\n";
4278 }
4279
4280 # returns a submenu for the nagivation of the refs views (tags, heads,
4281 # remotes) with the current view disabled and the remotes view only
4282 # available if the feature is enabled
4283 sub format_ref_views {
4284         my ($current) = @_;
4285         my @ref_views = qw{tags heads};
4286         push @ref_views, 'remotes' if gitweb_check_feature('remote_heads');
4287         return join " | ", map {
4288                 $_ eq $current ? $_ :
4289                 $cgi->a({-href => href(action=>$_)}, $_)
4290         } @ref_views
4291 }
4292
4293 sub format_paging_nav {
4294         my ($action, $page, $has_next_link) = @_;
4295         my $paging_nav;
4296
4297
4298         if ($page > 0) {
4299                 $paging_nav .=
4300                         $cgi->a({-href => href(-replay=>1, page=>undef)}, "first") .
4301                         " &sdot; " .
4302                         $cgi->a({-href => href(-replay=>1, page=>$page-1),
4303                                  -accesskey => "p", -title => "Alt-p"}, "prev");
4304         } else {
4305                 $paging_nav .= "first &sdot; prev";
4306         }
4307
4308         if ($has_next_link) {
4309                 $paging_nav .= " &sdot; " .
4310                         $cgi->a({-href => href(-replay=>1, page=>$page+1),
4311                                  -accesskey => "n", -title => "Alt-n"}, "next");
4312         } else {
4313                 $paging_nav .= " &sdot; next";
4314         }
4315
4316         return $paging_nav;
4317 }
4318
4319 ## ......................................................................
4320 ## functions printing or outputting HTML: div
4321
4322 sub git_print_header_div {
4323         my ($action, $title, $hash, $hash_base) = @_;
4324         my %args = ();
4325
4326         $args{'action'} = $action;
4327         $args{'hash'} = $hash if $hash;
4328         $args{'hash_base'} = $hash_base if $hash_base;
4329
4330         print "<div class=\"header\">\n" .
4331               $cgi->a({-href => href(%args), -class => "title"},
4332               $title ? $title : $action) .
4333               "\n</div>\n";
4334 }
4335
4336 sub format_repo_url {
4337         my ($name, $url) = @_;
4338         return "<tr class=\"metadata_url\"><td>$name</td><td>$url</td></tr>\n";
4339 }
4340
4341 # Group output by placing it in a DIV element and adding a header.
4342 # Options for start_div() can be provided by passing a hash reference as the
4343 # first parameter to the function.
4344 # Options to git_print_header_div() can be provided by passing an array
4345 # reference. This must follow the options to start_div if they are present.
4346 # The content can be a scalar, which is output as-is, a scalar reference, which
4347 # is output after html escaping, an IO handle passed either as *handle or
4348 # *handle{IO}, or a function reference. In the latter case all following
4349 # parameters will be taken as argument to the content function call.
4350 sub git_print_section {
4351         my ($div_args, $header_args, $content);
4352         my $arg = shift;
4353         if (ref($arg) eq 'HASH') {
4354                 $div_args = $arg;
4355                 $arg = shift;
4356         }
4357         if (ref($arg) eq 'ARRAY') {
4358                 $header_args = $arg;
4359                 $arg = shift;
4360         }
4361         $content = $arg;
4362
4363         print $cgi->start_div($div_args);
4364         git_print_header_div(@$header_args);
4365
4366         if (ref($content) eq 'CODE') {
4367                 $content->(@_);
4368         } elsif (ref($content) eq 'SCALAR') {
4369                 print esc_html($$content);
4370         } elsif (ref($content) eq 'GLOB' or ref($content) eq 'IO::Handle') {
4371                 print <$content>;
4372         } elsif (!ref($content) && defined($content)) {
4373                 print $content;
4374         }
4375
4376         print $cgi->end_div;
4377 }
4378
4379 sub format_timestamp_html {
4380         my $date = shift;
4381         my $strtime = $date->{'rfc2822'};
4382
4383         my (undef, undef, $datetime_class) =
4384                 gitweb_get_feature('javascript-timezone');
4385         if ($datetime_class) {
4386                 $strtime = qq!<span class="$datetime_class">$strtime</span>!;
4387         }
4388
4389         my $localtime_format = '(%02d:%02d %s)';
4390         if ($date->{'hour_local'} < 6) {
4391                 $localtime_format = '(<span class="atnight">%02d:%02d</span> %s)';
4392         }
4393         $strtime .= ' ' .
4394                     sprintf($localtime_format,
4395                             $date->{'hour_local'}, $date->{'minute_local'}, $date->{'tz_local'});
4396
4397         return $strtime;
4398 }
4399
4400 # Outputs the author name and date in long form
4401 sub git_print_authorship {
4402         my $co = shift;
4403         my %opts = @_;
4404         my $tag = $opts{-tag} || 'div';
4405         my $author = $co->{'author_name'};
4406
4407         my %ad = parse_date($co->{'author_epoch'}, $co->{'author_tz'});
4408         print "<$tag class=\"author_date\">" .
4409               format_search_author($author, "author", esc_html($author)) .
4410               " [".format_timestamp_html(\%ad)."]".
4411               git_get_avatar($co->{'author_email'}, -pad_before => 1) .
4412               "</$tag>\n";
4413 }
4414
4415 # Outputs table rows containing the full author or committer information,
4416 # in the format expected for 'commit' view (& similar).
4417 # Parameters are a commit hash reference, followed by the list of people
4418 # to output information for. If the list is empty it defaults to both
4419 # author and committer.
4420 sub git_print_authorship_rows {
4421         my $co = shift;
4422         # too bad we can't use @people = @_ || ('author', 'committer')
4423         my @people = @_;
4424         @people = ('author', 'committer') unless @people;
4425         foreach my $who (@people) {
4426                 my %wd = parse_date($co->{"${who}_epoch"}, $co->{"${who}_tz"});
4427                 print "<tr><td>$who</td><td>" .
4428                       format_search_author($co->{"${who}_name"}, $who,
4429                                            esc_html($co->{"${who}_name"})) . " " .
4430                       format_search_author($co->{"${who}_email"}, $who,
4431                                            esc_html("<" . $co->{"${who}_email"} . ">")) .
4432                       "</td><td rowspan=\"2\">" .
4433                       git_get_avatar($co->{"${who}_email"}, -size => 'double') .
4434                       "</td></tr>\n" .
4435                       "<tr>" .
4436                       "<td></td><td>" .
4437                       format_timestamp_html(\%wd) .
4438                       "</td>" .
4439                       "</tr>\n";
4440         }
4441 }
4442
4443 sub git_print_page_path {
4444         my $name = shift;
4445         my $type = shift;
4446         my $hb = shift;
4447
4448
4449         print "<div class=\"page_path\">";
4450         print $cgi->a({-href => href(action=>"tree", hash_base=>$hb),
4451                       -title => 'tree root'}, to_utf8("[$project]"));
4452         print " / ";
4453         if (defined $name) {
4454                 my @dirname = split '/', $name;
4455                 my $basename = pop @dirname;
4456                 my $fullname = '';
4457
4458                 foreach my $dir (@dirname) {
4459                         $fullname .= ($fullname ? '/' : '') . $dir;
4460                         print $cgi->a({-href => href(action=>"tree", file_name=>$fullname,
4461                                                      hash_base=>$hb),
4462                                       -title => $fullname}, esc_path($dir));
4463                         print " / ";
4464                 }
4465                 if (defined $type && $type eq 'blob') {
4466                         print $cgi->a({-href => href(action=>"blob_plain", file_name=>$file_name,
4467                                                      hash_base=>$hb),
4468                                       -title => $name}, esc_path($basename));
4469                 } elsif (defined $type && $type eq 'tree') {
4470                         print $cgi->a({-href => href(action=>"tree", file_name=>$file_name,
4471                                                      hash_base=>$hb),
4472                                       -title => $name}, esc_path($basename));
4473                         print " / ";
4474                 } else {
4475                         print esc_path($basename);
4476                 }
4477         }
4478         print "<br/></div>\n";
4479 }
4480
4481 sub git_print_log {
4482         my $log = shift;
4483         my %opts = @_;
4484
4485         if ($opts{'-remove_title'}) {
4486                 # remove title, i.e. first line of log
4487                 shift @$log;
4488         }
4489         # remove leading empty lines
4490         while (defined $log->[0] && $log->[0] eq "") {
4491                 shift @$log;
4492         }
4493
4494         # print log
4495         my $skip_blank_line = 0;
4496         foreach my $line (@$log) {
4497                 if ($line =~ m/^\s*([A-Z][-A-Za-z]*-[Bb]y|C[Cc]): /) {
4498                         if (! $opts{'-remove_signoff'}) {
4499                                 print "<span class=\"signoff\">" . esc_html($line) . "</span><br/>\n";
4500                                 $skip_blank_line = 1;
4501                         }
4502                         next;
4503                 }
4504
4505                 if ($line =~ m,\s*([a-z]*link): (https?://\S+),i) {
4506                         if (! $opts{'-remove_signoff'}) {
4507                                 print "<span class=\"signoff\">" . esc_html($1) . ": " .
4508                                         "<a href=\"" . esc_html($2) . "\">" . esc_html($2) . "</a>" .
4509                                         "</span><br/>\n";
4510                                 $skip_blank_line = 1;
4511                         }
4512                         next;
4513                 }
4514
4515                 # print only one empty line
4516                 # do not print empty line after signoff
4517                 if ($line eq "") {
4518                         next if ($skip_blank_line);
4519                         $skip_blank_line = 1;
4520                 } else {
4521                         $skip_blank_line = 0;
4522                 }
4523
4524                 print format_log_line_html($line) . "<br/>\n";
4525         }
4526
4527         if ($opts{'-final_empty_line'}) {
4528                 # end with single empty line
4529                 print "<br/>\n" unless $skip_blank_line;
4530         }
4531 }
4532
4533 # return link target (what link points to)
4534 sub git_get_link_target {
4535         my $hash = shift;
4536         my $link_target;
4537
4538         # read link
4539         open my $fd, "-|", git_cmd(), "cat-file", "blob", $hash
4540                 or return;
4541         {
4542                 local $/ = undef;
4543                 $link_target = <$fd>;
4544         }
4545         close $fd
4546                 or return;
4547
4548         return $link_target;
4549 }
4550
4551 # given link target, and the directory (basedir) the link is in,
4552 # return target of link relative to top directory (top tree);
4553 # return undef if it is not possible (including absolute links).
4554 sub normalize_link_target {
4555         my ($link_target, $basedir) = @_;
4556
4557         # absolute symlinks (beginning with '/') cannot be normalized
4558         return if (substr($link_target, 0, 1) eq '/');
4559
4560         # normalize link target to path from top (root) tree (dir)
4561         my $path;
4562         if ($basedir) {
4563                 $path = $basedir . '/' . $link_target;
4564         } else {
4565                 # we are in top (root) tree (dir)
4566                 $path = $link_target;
4567         }
4568
4569         # remove //, /./, and /../
4570         my @path_parts;
4571         foreach my $part (split('/', $path)) {
4572                 # discard '.' and ''
4573                 next if (!$part || $part eq '.');
4574                 # handle '..'
4575                 if ($part eq '..') {
4576                         if (@path_parts) {
4577                                 pop @path_parts;
4578                         } else {
4579                                 # link leads outside repository (outside top dir)
4580                                 return;
4581                         }
4582                 } else {
4583                         push @path_parts, $part;
4584                 }
4585         }
4586         $path = join('/', @path_parts);
4587
4588         return $path;
4589 }
4590
4591 # print tree entry (row of git_tree), but without encompassing <tr> element
4592 sub git_print_tree_entry {
4593         my ($t, $basedir, $hash_base, $have_blame) = @_;
4594
4595         my %base_key = ();
4596         $base_key{'hash_base'} = $hash_base if defined $hash_base;
4597
4598         # The format of a table row is: mode list link.  Where mode is
4599         # the mode of the entry, list is the name of the entry, an href,
4600         # and link is the action links of the entry.
4601
4602         print "<td class=\"mode\">" . mode_str($t->{'mode'}) . "</td>\n";
4603         if (exists $t->{'size'}) {
4604                 print "<td class=\"size\">$t->{'size'}</td>\n";
4605         }
4606         if ($t->{'type'} eq "blob") {
4607                 print "<td class=\"list\">" .
4608                         $cgi->a({-href => href(action=>"blob", hash=>$t->{'hash'},
4609                                                file_name=>"$basedir$t->{'name'}", %base_key),
4610                                 -class => "list"}, esc_path($t->{'name'}));
4611                 if (S_ISLNK(oct $t->{'mode'})) {
4612                         my $link_target = git_get_link_target($t->{'hash'});
4613                         if ($link_target) {
4614                                 my $norm_target = normalize_link_target($link_target, $basedir);
4615                                 if (defined $norm_target) {
4616                                         print " -> " .
4617                                               $cgi->a({-href => href(action=>"object", hash_base=>$hash_base,
4618                                                                      file_name=>$norm_target),
4619                                                        -title => $norm_target}, esc_path($link_target));
4620                                 } else {
4621                                         print " -> " . esc_path($link_target);
4622                                 }
4623                         }
4624                 }
4625                 print "</td>\n";
4626                 print "<td class=\"link\">";
4627                 print $cgi->a({-href => href(action=>"blob", hash=>$t->{'hash'},
4628                                              file_name=>"$basedir$t->{'name'}", %base_key)},
4629                               "blob");
4630                 if ($have_blame) {
4631                         print " | " .
4632                               $cgi->a({-href => href(action=>"blame", hash=>$t->{'hash'},
4633                                                      file_name=>"$basedir$t->{'name'}", %base_key)},
4634                                       "blame");
4635                 }
4636                 if (defined $hash_base) {
4637                         print " | " .
4638                               $cgi->a({-href => href(action=>"history", hash_base=>$hash_base,
4639                                                      hash=>$t->{'hash'}, file_name=>"$basedir$t->{'name'}")},
4640                                       "history");
4641                 }
4642                 print " | " .
4643                         $cgi->a({-href => href(action=>"blob_plain", hash_base=>$hash_base,
4644                                                file_name=>"$basedir$t->{'name'}")},
4645                                 "raw");
4646                 print "</td>\n";
4647
4648         } elsif ($t->{'type'} eq "tree") {
4649                 print "<td class=\"list\">";
4650                 print $cgi->a({-href => href(action=>"tree", hash=>$t->{'hash'},
4651                                              file_name=>"$basedir$t->{'name'}",
4652                                              %base_key)},
4653                               esc_path($t->{'name'}));
4654                 print "</td>\n";
4655                 print "<td class=\"link\">";
4656                 print $cgi->a({-href => href(action=>"tree", hash=>$t->{'hash'},
4657                                              file_name=>"$basedir$t->{'name'}",
4658                                              %base_key)},
4659                               "tree");
4660                 if (defined $hash_base) {
4661                         print " | " .
4662                               $cgi->a({-href => href(action=>"history", hash_base=>$hash_base,
4663                                                      file_name=>"$basedir$t->{'name'}")},
4664                                       "history");
4665                 }
4666                 print "</td>\n";
4667         } else {
4668                 # unknown object: we can only present history for it
4669                 # (this includes 'commit' object, i.e. submodule support)
4670                 print "<td class=\"list\">" .
4671                       esc_path($t->{'name'}) .
4672                       "</td>\n";
4673                 print "<td class=\"link\">";
4674                 if (defined $hash_base) {
4675                         print $cgi->a({-href => href(action=>"history",
4676                                                      hash_base=>$hash_base,
4677                                                      file_name=>"$basedir$t->{'name'}")},
4678                                       "history");
4679                 }
4680                 print "</td>\n";
4681         }
4682 }
4683
4684 ## ......................................................................
4685 ## functions printing large fragments of HTML
4686
4687 # get pre-image filenames for merge (combined) diff
4688 sub fill_from_file_info {
4689         my ($diff, @parents) = @_;
4690
4691         $diff->{'from_file'} = [ ];
4692         $diff->{'from_file'}[$diff->{'nparents'} - 1] = undef;
4693         for (my $i = 0; $i < $diff->{'nparents'}; $i++) {
4694                 if ($diff->{'status'}[$i] eq 'R' ||
4695                     $diff->{'status'}[$i] eq 'C') {
4696                         $diff->{'from_file'}[$i] =
4697                                 git_get_path_by_hash($parents[$i], $diff->{'from_id'}[$i]);
4698                 }
4699         }
4700
4701         return $diff;
4702 }
4703
4704 # is current raw difftree line of file deletion
4705 sub is_deleted {
4706         my $diffinfo = shift;
4707
4708         return $diffinfo->{'to_id'} eq ('0' x 40);
4709 }
4710
4711 # does patch correspond to [previous] difftree raw line
4712 # $diffinfo  - hashref of parsed raw diff format
4713 # $patchinfo - hashref of parsed patch diff format
4714 #              (the same keys as in $diffinfo)
4715 sub is_patch_split {
4716         my ($diffinfo, $patchinfo) = @_;
4717
4718         return defined $diffinfo && defined $patchinfo
4719                 && $diffinfo->{'to_file'} eq $patchinfo->{'to_file'};
4720 }
4721
4722
4723 sub git_difftree_body {
4724         my ($difftree, $hash, @parents) = @_;
4725         my ($parent) = $parents[0];
4726         my $have_blame = gitweb_check_feature('blame');
4727         print "<div class=\"list_head\">\n";
4728         if ($#{$difftree} > 10) {
4729                 print(($#{$difftree} + 1) . " files changed:\n");
4730         }
4731         print "</div>\n";
4732
4733         print "<table class=\"" .
4734               (@parents > 1 ? "combined " : "") .
4735               "diff_tree\">\n";
4736
4737         # header only for combined diff in 'commitdiff' view
4738         my $has_header = @$difftree && @parents > 1 && $action eq 'commitdiff';
4739         if ($has_header) {
4740                 # table header
4741                 print "<thead><tr>\n" .
4742                        "<th></th><th></th>\n"; # filename, patchN link
4743                 for (my $i = 0; $i < @parents; $i++) {
4744                         my $par = $parents[$i];
4745                         print "<th>" .
4746                               $cgi->a({-href => href(action=>"commitdiff",
4747                                                      hash=>$hash, hash_parent=>$par),
4748                                        -title => 'commitdiff to parent number ' .
4749                                                   ($i+1) . ': ' . substr($par,0,7)},
4750                                       $i+1) .
4751                               "&nbsp;</th>\n";
4752                 }
4753                 print "</tr></thead>\n<tbody>\n";
4754         }
4755
4756         my $alternate = 1;
4757         my $patchno = 0;
4758         foreach my $line (@{$difftree}) {
4759                 my $diff = parsed_difftree_line($line);
4760
4761                 if ($alternate) {
4762                         print "<tr class=\"dark\">\n";
4763                 } else {
4764                         print "<tr class=\"light\">\n";
4765                 }
4766                 $alternate ^= 1;
4767
4768                 if (exists $diff->{'nparents'}) { # combined diff
4769
4770                         fill_from_file_info($diff, @parents)
4771                                 unless exists $diff->{'from_file'};
4772
4773                         if (!is_deleted($diff)) {
4774                                 # file exists in the result (child) commit
4775                                 print "<td>" .
4776                                       $cgi->a({-href => href(action=>"blob", hash=>$diff->{'to_id'},
4777                                                              file_name=>$diff->{'to_file'},
4778                                                              hash_base=>$hash),
4779                                               -class => "list"}, esc_path($diff->{'to_file'})) .
4780                                       "</td>\n";
4781                         } else {
4782                                 print "<td>" .
4783                                       esc_path($diff->{'to_file'}) .
4784                                       "</td>\n";
4785                         }
4786
4787                         if ($action eq 'commitdiff') {
4788                                 # link to patch
4789                                 $patchno++;
4790                                 print "<td class=\"link\">" .
4791                                       $cgi->a({-href => href(-anchor=>"patch$patchno")},
4792                                               "patch") .
4793                                       " | " .
4794                                       "</td>\n";
4795                         }
4796
4797                         my $has_history = 0;
4798                         my $not_deleted = 0;
4799                         for (my $i = 0; $i < $diff->{'nparents'}; $i++) {
4800                                 my $hash_parent = $parents[$i];
4801                                 my $from_hash = $diff->{'from_id'}[$i];
4802                                 my $from_path = $diff->{'from_file'}[$i];
4803                                 my $status = $diff->{'status'}[$i];
4804
4805                                 $has_history ||= ($status ne 'A');
4806                                 $not_deleted ||= ($status ne 'D');
4807
4808                                 if ($status eq 'A') {
4809                                         print "<td  class=\"link\" align=\"right\"> | </td>\n";
4810                                 } elsif ($status eq 'D') {
4811                                         print "<td class=\"link\">" .
4812                                               $cgi->a({-href => href(action=>"blob",
4813                                                                      hash_base=>$hash,
4814                                                                      hash=>$from_hash,
4815                                                                      file_name=>$from_path)},
4816                                                       "blob" . ($i+1)) .
4817                                               " | </td>\n";
4818                                 } else {
4819                                         if ($diff->{'to_id'} eq $from_hash) {
4820                                                 print "<td class=\"link nochange\">";
4821                                         } else {
4822                                                 print "<td class=\"link\">";
4823                                         }
4824                                         print $cgi->a({-href => href(action=>"blobdiff",
4825                                                                      hash=>$diff->{'to_id'},
4826                                                                      hash_parent=>$from_hash,
4827                                                                      hash_base=>$hash,
4828                                                                      hash_parent_base=>$hash_parent,
4829                                                                      file_name=>$diff->{'to_file'},
4830                                                                      file_parent=>$from_path)},
4831                                                       "diff" . ($i+1)) .
4832                                               " | </td>\n";
4833                                 }
4834                         }
4835
4836                         print "<td class=\"link\">";
4837                         if ($not_deleted) {
4838                                 print $cgi->a({-href => href(action=>"blob",
4839                                                              hash=>$diff->{'to_id'},
4840                                                              file_name=>$diff->{'to_file'},
4841                                                              hash_base=>$hash)},
4842                                               "blob");
4843                                 print " | " if ($has_history);
4844                         }
4845                         if ($has_history) {
4846                                 print $cgi->a({-href => href(action=>"history",
4847                                                              file_name=>$diff->{'to_file'},
4848                                                              hash_base=>$hash)},
4849                                               "history");
4850                         }
4851                         print "</td>\n";
4852
4853                         print "</tr>\n";
4854                         next; # instead of 'else' clause, to avoid extra indent
4855                 }
4856                 # else ordinary diff
4857
4858                 my ($to_mode_oct, $to_mode_str, $to_file_type);
4859                 my ($from_mode_oct, $from_mode_str, $from_file_type);
4860                 if ($diff->{'to_mode'} ne ('0' x 6)) {
4861                         $to_mode_oct = oct $diff->{'to_mode'};
4862                         if (S_ISREG($to_mode_oct)) { # only for regular file
4863                                 $to_mode_str = sprintf("%04o", $to_mode_oct & 0777); # permission bits
4864                         }
4865                         $to_file_type = file_type($diff->{'to_mode'});
4866                 }
4867                 if ($diff->{'from_mode'} ne ('0' x 6)) {
4868                         $from_mode_oct = oct $diff->{'from_mode'};
4869                         if (S_ISREG($from_mode_oct)) { # only for regular file
4870                                 $from_mode_str = sprintf("%04o", $from_mode_oct & 0777); # permission bits
4871                         }
4872                         $from_file_type = file_type($diff->{'from_mode'});
4873                 }
4874
4875                 if ($diff->{'status'} eq "A") { # created
4876                         my $mode_chng = "<span class=\"file_status new\">[new $to_file_type";
4877                         $mode_chng   .= " with mode: $to_mode_str" if $to_mode_str;
4878                         $mode_chng   .= "]</span>";
4879                         print "<td>";
4880                         print $cgi->a({-href => href(action=>"blob", hash=>$diff->{'to_id'},
4881                                                      hash_base=>$hash, file_name=>$diff->{'file'}),
4882                                       -class => "list"}, esc_path($diff->{'file'}));
4883                         print "</td>\n";
4884                         print "<td>$mode_chng</td>\n";
4885                         print "<td class=\"link\">";
4886                         if ($action eq 'commitdiff') {
4887                                 # link to patch
4888                                 $patchno++;
4889                                 print $cgi->a({-href => href(-anchor=>"patch$patchno")},
4890                                               "patch") .
4891                                       " | ";
4892                         }
4893                         print $cgi->a({-href => href(action=>"blob", hash=>$diff->{'to_id'},
4894                                                      hash_base=>$hash, file_name=>$diff->{'file'})},
4895                                       "blob");
4896                         print "</td>\n";
4897
4898                 } elsif ($diff->{'status'} eq "D") { # deleted
4899                         my $mode_chng = "<span class=\"file_status deleted\">[deleted $from_file_type]</span>";
4900                         print "<td>";
4901                         print $cgi->a({-href => href(action=>"blob", hash=>$diff->{'from_id'},
4902                                                      hash_base=>$parent, file_name=>$diff->{'file'}),
4903                                        -class => "list"}, esc_path($diff->{'file'}));
4904                         print "</td>\n";
4905                         print "<td>$mode_chng</td>\n";
4906                         print "<td class=\"link\">";
4907                         if ($action eq 'commitdiff') {
4908                                 # link to patch
4909                                 $patchno++;
4910                                 print $cgi->a({-href => href(-anchor=>"patch$patchno")},
4911                                               "patch") .
4912                                       " | ";
4913                         }
4914                         print $cgi->a({-href => href(action=>"blob", hash=>$diff->{'from_id'},
4915                                                      hash_base=>$parent, file_name=>$diff->{'file'})},
4916                                       "blob") . " | ";
4917                         if ($have_blame) {
4918                                 print $cgi->a({-href => href(action=>"blame", hash_base=>$parent,
4919                                                              file_name=>$diff->{'file'})},
4920                                               "blame") . " | ";
4921                         }
4922                         print $cgi->a({-href => href(action=>"history", hash_base=>$parent,
4923                                                      file_name=>$diff->{'file'})},
4924                                       "history");
4925                         print "</td>\n";
4926
4927                 } elsif ($diff->{'status'} eq "M" || $diff->{'status'} eq "T") { # modified, or type changed
4928                         my $mode_chnge = "";
4929                         if ($diff->{'from_mode'} != $diff->{'to_mode'}) {
4930                                 $mode_chnge = "<span class=\"file_status mode_chnge\">[changed";
4931                                 if ($from_file_type ne $to_file_type) {
4932                                         $mode_chnge .= " from $from_file_type to $to_file_type";
4933                                 }
4934                                 if (($from_mode_oct & 0777) != ($to_mode_oct & 0777)) {
4935                                         if ($from_mode_str && $to_mode_str) {
4936                                                 $mode_chnge .= " mode: $from_mode_str->$to_mode_str";
4937                                         } elsif ($to_mode_str) {
4938                                                 $mode_chnge .= " mode: $to_mode_str";
4939                                         }
4940                                 }
4941                                 $mode_chnge .= "]</span>\n";
4942                         }
4943                         print "<td>";
4944                         print $cgi->a({-href => href(action=>"blob", hash=>$diff->{'to_id'},
4945                                                      hash_base=>$hash, file_name=>$diff->{'file'}),
4946                                       -class => "list"}, esc_path($diff->{'file'}));
4947                         print "</td>\n";
4948                         print "<td>$mode_chnge</td>\n";
4949                         print "<td class=\"link\">";
4950                         if ($action eq 'commitdiff') {
4951                                 # link to patch
4952                                 $patchno++;
4953                                 print $cgi->a({-href => href(-anchor=>"patch$patchno")},
4954                                               "patch") .
4955                                       " | ";
4956                         } elsif ($diff->{'to_id'} ne $diff->{'from_id'}) {
4957                                 # "commit" view and modified file (not onlu mode changed)
4958                                 print $cgi->a({-href => href(action=>"blobdiff",
4959                                                              hash=>$diff->{'to_id'}, hash_parent=>$diff->{'from_id'},
4960                                                              hash_base=>$hash, hash_parent_base=>$parent,
4961                                                              file_name=>$diff->{'file'})},
4962                                               "diff") .
4963                                       " | ";
4964                         }
4965                         print $cgi->a({-href => href(action=>"blob", hash=>$diff->{'to_id'},
4966                                                      hash_base=>$hash, file_name=>$diff->{'file'})},
4967                                        "blob") . " | ";
4968                         if ($have_blame) {
4969                                 print $cgi->a({-href => href(action=>"blame", hash_base=>$hash,
4970                                                              file_name=>$diff->{'file'})},
4971                                               "blame") . " | ";
4972                         }
4973                         print $cgi->a({-href => href(action=>"history", hash_base=>$hash,
4974                                                      file_name=>$diff->{'file'})},
4975                                       "history");
4976                         print "</td>\n";
4977
4978                 } elsif ($diff->{'status'} eq "R" || $diff->{'status'} eq "C") { # renamed or copied
4979                         my %status_name = ('R' => 'moved', 'C' => 'copied');
4980                         my $nstatus = $status_name{$diff->{'status'}};
4981                         my $mode_chng = "";
4982                         if ($diff->{'from_mode'} != $diff->{'to_mode'}) {
4983                                 # mode also for directories, so we cannot use $to_mode_str
4984                                 $mode_chng = sprintf(", mode: %04o", $to_mode_oct & 0777);
4985                         }
4986                         print "<td>" .
4987                               $cgi->a({-href => href(action=>"blob", hash_base=>$hash,
4988                                                      hash=>$diff->{'to_id'}, file_name=>$diff->{'to_file'}),
4989                                       -class => "list"}, esc_path($diff->{'to_file'})) . "</td>\n" .
4990                               "<td><span class=\"file_status $nstatus\">[$nstatus from " .
4991                               $cgi->a({-href => href(action=>"blob", hash_base=>$parent,
4992                                                      hash=>$diff->{'from_id'}, file_name=>$diff->{'from_file'}),
4993                                       -class => "list"}, esc_path($diff->{'from_file'})) .
4994                               " with " . (int $diff->{'similarity'}) . "% similarity$mode_chng]</span></td>\n" .
4995                               "<td class=\"link\">";
4996                         if ($action eq 'commitdiff') {
4997                                 # link to patch
4998                                 $patchno++;
4999                                 print $cgi->a({-href => href(-anchor=>"patch$patchno")},
5000                                               "patch") .
5001                                       " | ";
5002                         } elsif ($diff->{'to_id'} ne $diff->{'from_id'}) {
5003                                 # "commit" view and modified file (not only pure rename or copy)
5004                                 print $cgi->a({-href => href(action=>"blobdiff",
5005                                                              hash=>$diff->{'to_id'}, hash_parent=>$diff->{'from_id'},
5006                                                              hash_base=>$hash, hash_parent_base=>$parent,
5007                                                              file_name=>$diff->{'to_file'}, file_parent=>$diff->{'from_file'})},
5008                                               "diff") .
5009                                       " | ";
5010                         }
5011                         print $cgi->a({-href => href(action=>"blob", hash=>$diff->{'to_id'},
5012                                                      hash_base=>$parent, file_name=>$diff->{'to_file'})},
5013                                       "blob") . " | ";
5014                         if ($have_blame) {
5015                                 print $cgi->a({-href => href(action=>"blame", hash_base=>$hash,
5016                                                              file_name=>$diff->{'to_file'})},
5017                                               "blame") . " | ";
5018                         }
5019                         print $cgi->a({-href => href(action=>"history", hash_base=>$hash,
5020                                                     file_name=>$diff->{'to_file'})},
5021                                       "history");
5022                         print "</td>\n";
5023
5024                 } # we should not encounter Unmerged (U) or Unknown (X) status
5025                 print "</tr>\n";
5026         }
5027         print "</tbody>" if $has_header;
5028         print "</table>\n";
5029 }
5030
5031 # Print context lines and then rem/add lines in a side-by-side manner.
5032 sub print_sidebyside_diff_lines {
5033         my ($ctx, $rem, $add) = @_;
5034
5035         # print context block before add/rem block
5036         if (@$ctx) {
5037                 print join '',
5038                         '<div class="chunk_block ctx">',
5039                                 '<div class="old">',
5040                                 @$ctx,
5041                                 '</div>',
5042                                 '<div class="new">',
5043                                 @$ctx,
5044                                 '</div>',
5045                         '</div>';
5046         }
5047
5048         if (!@$add) {
5049                 # pure removal
5050                 print join '',
5051                         '<div class="chunk_block rem">',
5052                                 '<div class="old">',
5053                                 @$rem,
5054                                 '</div>',
5055                         '</div>';
5056         } elsif (!@$rem) {
5057                 # pure addition
5058                 print join '',
5059                         '<div class="chunk_block add">',
5060                                 '<div class="new">',
5061                                 @$add,
5062                                 '</div>',
5063                         '</div>';
5064         } else {
5065                 print join '',
5066                         '<div class="chunk_block chg">',
5067                                 '<div class="old">',
5068                                 @$rem,
5069                                 '</div>',
5070                                 '<div class="new">',
5071                                 @$add,
5072                                 '</div>',
5073                         '</div>';
5074         }
5075 }
5076
5077 # Print context lines and then rem/add lines in inline manner.
5078 sub print_inline_diff_lines {
5079         my ($ctx, $rem, $add) = @_;
5080
5081         print @$ctx, @$rem, @$add;
5082 }
5083
5084 # Format removed and added line, mark changed part and HTML-format them.
5085 # Implementation is based on contrib/diff-highlight
5086 sub format_rem_add_lines_pair {
5087         my ($rem, $add, $num_parents) = @_;
5088
5089         # We need to untabify lines before split()'ing them;
5090         # otherwise offsets would be invalid.
5091         chomp $rem;
5092         chomp $add;
5093         $rem = untabify($rem);
5094         $add = untabify($add);
5095
5096         my @rem = split(//, $rem);
5097         my @add = split(//, $add);
5098         my ($esc_rem, $esc_add);
5099         # Ignore leading +/- characters for each parent.
5100         my ($prefix_len, $suffix_len) = ($num_parents, 0);
5101         my ($prefix_has_nonspace, $suffix_has_nonspace);
5102
5103         my $shorter = (@rem < @add) ? @rem : @add;
5104         while ($prefix_len < $shorter) {
5105                 last if ($rem[$prefix_len] ne $add[$prefix_len]);
5106
5107                 $prefix_has_nonspace = 1 if ($rem[$prefix_len] !~ /\s/);
5108                 $prefix_len++;
5109         }
5110
5111         while ($prefix_len + $suffix_len < $shorter) {
5112                 last if ($rem[-1 - $suffix_len] ne $add[-1 - $suffix_len]);
5113
5114                 $suffix_has_nonspace = 1 if ($rem[-1 - $suffix_len] !~ /\s/);
5115                 $suffix_len++;
5116         }
5117
5118         # Mark lines that are different from each other, but have some common
5119         # part that isn't whitespace.  If lines are completely different, don't
5120         # mark them because that would make output unreadable, especially if
5121         # diff consists of multiple lines.
5122         if ($prefix_has_nonspace || $suffix_has_nonspace) {
5123                 $esc_rem = esc_html_hl_regions($rem, 'marked',
5124                         [$prefix_len, @rem - $suffix_len], -nbsp=>1);
5125                 $esc_add = esc_html_hl_regions($add, 'marked',
5126                         [$prefix_len, @add - $suffix_len], -nbsp=>1);
5127         } else {
5128                 $esc_rem = esc_html($rem, -nbsp=>1);
5129                 $esc_add = esc_html($add, -nbsp=>1);
5130         }
5131
5132         return format_diff_line(\$esc_rem, 'rem'),
5133                format_diff_line(\$esc_add, 'add');
5134 }
5135
5136 # HTML-format diff context, removed and added lines.
5137 sub format_ctx_rem_add_lines {
5138         my ($ctx, $rem, $add, $num_parents) = @_;
5139         my (@new_ctx, @new_rem, @new_add);
5140         my $can_highlight = 0;
5141         my $is_combined = ($num_parents > 1);
5142
5143         # Highlight if every removed line has a corresponding added line.
5144         if (@$add > 0 && @$add == @$rem) {
5145                 $can_highlight = 1;
5146
5147                 # Highlight lines in combined diff only if the chunk contains
5148                 # diff between the same version, e.g.
5149                 #
5150                 #    - a
5151                 #   -  b
5152                 #    + c
5153                 #   +  d
5154                 #
5155                 # Otherwise the highlightling would be confusing.
5156                 if ($is_combined) {
5157                         for (my $i = 0; $i < @$add; $i++) {
5158                                 my $prefix_rem = substr($rem->[$i], 0, $num_parents);
5159                                 my $prefix_add = substr($add->[$i], 0, $num_parents);
5160
5161                                 $prefix_rem =~ s/-/+/g;
5162
5163                                 if ($prefix_rem ne $prefix_add) {
5164                                         $can_highlight = 0;
5165                                         last;
5166                                 }
5167                         }
5168                 }
5169         }
5170
5171         if ($can_highlight) {
5172                 for (my $i = 0; $i < @$add; $i++) {
5173                         my ($line_rem, $line_add) = format_rem_add_lines_pair(
5174                                 $rem->[$i], $add->[$i], $num_parents);
5175                         push @new_rem, $line_rem;
5176                         push @new_add, $line_add;
5177                 }
5178         } else {
5179                 @new_rem = map { format_diff_line($_, 'rem') } @$rem;
5180                 @new_add = map { format_diff_line($_, 'add') } @$add;
5181         }
5182
5183         @new_ctx = map { format_diff_line($_, 'ctx') } @$ctx;
5184
5185         return (\@new_ctx, \@new_rem, \@new_add);
5186 }
5187
5188 # Print context lines and then rem/add lines.
5189 sub print_diff_lines {
5190         my ($ctx, $rem, $add, $diff_style, $num_parents) = @_;
5191         my $is_combined = $num_parents > 1;
5192
5193         ($ctx, $rem, $add) = format_ctx_rem_add_lines($ctx, $rem, $add,
5194                 $num_parents);
5195
5196         if ($diff_style eq 'sidebyside' && !$is_combined) {
5197                 print_sidebyside_diff_lines($ctx, $rem, $add);
5198         } else {
5199                 # default 'inline' style and unknown styles
5200                 print_inline_diff_lines($ctx, $rem, $add);
5201         }
5202 }
5203
5204 sub print_diff_chunk {
5205         my ($diff_style, $num_parents, $from, $to, @chunk) = @_;
5206         my (@ctx, @rem, @add);
5207
5208         # The class of the previous line.
5209         my $prev_class = '';
5210
5211         return unless @chunk;
5212
5213         # incomplete last line might be among removed or added lines,
5214         # or both, or among context lines: find which
5215         for (my $i = 1; $i < @chunk; $i++) {
5216                 if ($chunk[$i][0] eq 'incomplete') {
5217                         $chunk[$i][0] = $chunk[$i-1][0];
5218                 }
5219         }
5220
5221         # guardian
5222         push @chunk, ["", ""];
5223
5224         foreach my $line_info (@chunk) {
5225                 my ($class, $line) = @$line_info;
5226
5227                 # print chunk headers
5228                 if ($class && $class eq 'chunk_header') {
5229                         print format_diff_line($line, $class, $from, $to);
5230                         next;
5231                 }
5232
5233                 ## print from accumulator when have some add/rem lines or end
5234                 # of chunk (flush context lines), or when have add and rem
5235                 # lines and new block is reached (otherwise add/rem lines could
5236                 # be reordered)
5237                 if (!$class || ((@rem || @add) && $class eq 'ctx') ||
5238                     (@rem && @add && $class ne $prev_class)) {
5239                         print_diff_lines(\@ctx, \@rem, \@add,
5240                                          $diff_style, $num_parents);
5241                         @ctx = @rem = @add = ();
5242                 }
5243
5244                 ## adding lines to accumulator
5245                 # guardian value
5246                 last unless $line;
5247                 # rem, add or change
5248                 if ($class eq 'rem') {
5249                         push @rem, $line;
5250                 } elsif ($class eq 'add') {
5251                         push @add, $line;
5252                 }
5253                 # context line
5254                 if ($class eq 'ctx') {
5255                         push @ctx, $line;
5256                 }
5257
5258                 $prev_class = $class;
5259         }
5260 }
5261
5262 sub git_patchset_body {
5263         my ($fd, $diff_style, $difftree, $hash, @hash_parents) = @_;
5264         my ($hash_parent) = $hash_parents[0];
5265
5266         my $is_combined = (@hash_parents > 1);
5267         my $patch_idx = 0;
5268         my $patch_number = 0;
5269         my $patch_line;
5270         my $diffinfo;
5271         my $to_name;
5272         my (%from, %to);
5273         my @chunk; # for side-by-side diff
5274
5275         print "<div class=\"patchset\">\n";
5276
5277         # skip to first patch
5278         while ($patch_line = <$fd>) {
5279                 chomp $patch_line;
5280
5281                 last if ($patch_line =~ m/^diff /);
5282         }
5283
5284  PATCH:
5285         while ($patch_line) {
5286
5287                 # parse "git diff" header line
5288                 if ($patch_line =~ m/^diff --git (\"(?:[^\\\"]*(?:\\.[^\\\"]*)*)\"|[^ "]*) (.*)$/) {
5289                         # $1 is from_name, which we do not use
5290                         $to_name = unquote($2);
5291                         $to_name =~ s!^b/!!;
5292                 } elsif ($patch_line =~ m/^diff --(cc|combined) ("?.*"?)$/) {
5293                         # $1 is 'cc' or 'combined', which we do not use
5294                         $to_name = unquote($2);
5295                 } else {
5296                         $to_name = undef;
5297                 }
5298
5299                 # check if current patch belong to current raw line
5300                 # and parse raw git-diff line if needed
5301                 if (is_patch_split($diffinfo, { 'to_file' => $to_name })) {
5302                         # this is continuation of a split patch
5303                         print "<div class=\"patch cont\">\n";
5304                 } else {
5305                         # advance raw git-diff output if needed
5306                         $patch_idx++ if defined $diffinfo;
5307
5308                         # read and prepare patch information
5309                         $diffinfo = parsed_difftree_line($difftree->[$patch_idx]);
5310
5311                         # compact combined diff output can have some patches skipped
5312                         # find which patch (using pathname of result) we are at now;
5313                         if ($is_combined) {
5314                                 while ($to_name ne $diffinfo->{'to_file'}) {
5315                                         print "<div class=\"patch\" id=\"patch". ($patch_idx+1) ."\">\n" .
5316                                               format_diff_cc_simplified($diffinfo, @hash_parents) .
5317                                               "</div>\n";  # class="patch"
5318
5319                                         $patch_idx++;
5320                                         $patch_number++;
5321
5322                                         last if $patch_idx > $#$difftree;
5323                                         $diffinfo = parsed_difftree_line($difftree->[$patch_idx]);
5324                                 }
5325                         }
5326
5327                         # modifies %from, %to hashes
5328                         parse_from_to_diffinfo($diffinfo, \%from, \%to, @hash_parents);
5329
5330                         # this is first patch for raw difftree line with $patch_idx index
5331                         # we index @$difftree array from 0, but number patches from 1
5332                         print "<div class=\"patch\" id=\"patch". ($patch_idx+1) ."\">\n";
5333                 }
5334
5335                 # git diff header
5336                 #assert($patch_line =~ m/^diff /) if DEBUG;
5337                 #assert($patch_line !~ m!$/$!) if DEBUG; # is chomp-ed
5338                 $patch_number++;
5339                 # print "git diff" header
5340                 print format_git_diff_header_line($patch_line, $diffinfo,
5341                                                   \%from, \%to);
5342
5343                 # print extended diff header
5344                 print "<div class=\"diff extended_header\">\n";
5345         EXTENDED_HEADER:
5346                 while ($patch_line = <$fd>) {
5347                         chomp $patch_line;
5348
5349                         last EXTENDED_HEADER if ($patch_line =~ m/^--- |^diff /);
5350
5351                         print format_extended_diff_header_line($patch_line, $diffinfo,
5352                                                                \%from, \%to);
5353                 }
5354                 print "</div>\n"; # class="diff extended_header"
5355
5356                 # from-file/to-file diff header
5357                 if (! $patch_line) {
5358                         print "</div>\n"; # class="patch"
5359                         last PATCH;
5360                 }
5361                 next PATCH if ($patch_line =~ m/^diff /);
5362                 #assert($patch_line =~ m/^---/) if DEBUG;
5363
5364                 my $last_patch_line = $patch_line;
5365                 $patch_line = <$fd>;
5366                 chomp $patch_line;
5367                 #assert($patch_line =~ m/^\+\+\+/) if DEBUG;
5368
5369                 print format_diff_from_to_header($last_patch_line, $patch_line,
5370                                                  $diffinfo, \%from, \%to,
5371                                                  @hash_parents);
5372
5373                 # the patch itself
5374         LINE:
5375                 while ($patch_line = <$fd>) {
5376                         chomp $patch_line;
5377
5378                         next PATCH if ($patch_line =~ m/^diff /);
5379
5380                         my $class = diff_line_class($patch_line, \%from, \%to);
5381
5382                         if ($class eq 'chunk_header') {
5383                                 print_diff_chunk($diff_style, scalar @hash_parents, \%from, \%to, @chunk);
5384                                 @chunk = ();
5385                         }
5386
5387                         push @chunk, [ $class, $patch_line ];
5388                 }
5389
5390         } continue {
5391                 if (@chunk) {
5392                         print_diff_chunk($diff_style, scalar @hash_parents, \%from, \%to, @chunk);
5393                         @chunk = ();
5394                 }
5395                 print "</div>\n"; # class="patch"
5396         }
5397
5398         # for compact combined (--cc) format, with chunk and patch simplification
5399         # the patchset might be empty, but there might be unprocessed raw lines
5400         for (++$patch_idx if $patch_number > 0;
5401              $patch_idx < @$difftree;
5402              ++$patch_idx) {
5403                 # read and prepare patch information
5404                 $diffinfo = parsed_difftree_line($difftree->[$patch_idx]);
5405
5406                 # generate anchor for "patch" links in difftree / whatchanged part
5407                 print "<div class=\"patch\" id=\"patch". ($patch_idx+1) ."\">\n" .
5408                       format_diff_cc_simplified($diffinfo, @hash_parents) .
5409                       "</div>\n";  # class="patch"
5410
5411                 $patch_number++;
5412         }
5413
5414         if ($patch_number == 0) {
5415                 if (@hash_parents > 1) {
5416                         print "<div class=\"diff nodifferences\">Trivial merge</div>\n";
5417                 } else {
5418                         print "<div class=\"diff nodifferences\">No differences found</div>\n";
5419                 }
5420         }
5421
5422         print "</div>\n"; # class="patchset"
5423 }
5424
5425 # . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
5426
5427 sub git_project_search_form {
5428         my ($searchtext, $search_use_regexp) = @_;
5429
5430         my $limit = '';
5431         if ($project_filter) {
5432                 $limit = " in '$project_filter/'";
5433         }
5434
5435         print "<div class=\"projsearch\">\n";
5436         print $cgi->startform(-method => 'get', -action => $my_uri) .
5437               $cgi->hidden(-name => 'a', -value => 'project_list')  . "\n";
5438         print $cgi->hidden(-name => 'pf', -value => $project_filter). "\n"
5439                 if (defined $project_filter);
5440         print $cgi->textfield(-name => 's', -value => $searchtext,
5441                               -title => "Search project by name and description$limit",
5442                               -size => 60) . "\n" .
5443               "<span title=\"Extended regular expression\">" .
5444               $cgi->checkbox(-name => 'sr', -value => 1, -label => 're',
5445                              -checked => $search_use_regexp) .
5446               "</span>\n" .
5447               $cgi->submit(-name => 'btnS', -value => 'Search') .
5448               $cgi->end_form() . "\n" .
5449               $cgi->a({-href => href(project => undef, searchtext => undef,
5450                                      project_filter => $project_filter)},
5451                       esc_html("List all projects$limit")) . "<br />\n";
5452         print "</div>\n";
5453 }
5454
5455 # entry for given @keys needs filling if at least one of keys in list
5456 # is not present in %$project_info
5457 sub project_info_needs_filling {
5458         my ($project_info, @keys) = @_;
5459
5460         # return List::MoreUtils::any { !exists $project_info->{$_} } @keys;
5461         foreach my $key (@keys) {
5462                 if (!exists $project_info->{$key}) {
5463                         return 1;
5464                 }
5465         }
5466         return;
5467 }
5468
5469 # fills project list info (age, description, owner, category, forks, etc.)
5470 # for each project in the list, removing invalid projects from
5471 # returned list, or fill only specified info.
5472 #
5473 # Invalid projects are removed from the returned list if and only if you
5474 # ask 'age' or 'age_string' to be filled, because they are the only fields
5475 # that run unconditionally git command that requires repository, and
5476 # therefore do always check if project repository is invalid.
5477 #
5478 # USAGE:
5479 # * fill_project_list_info(\@project_list, 'descr_long', 'ctags')
5480 #   ensures that 'descr_long' and 'ctags' fields are filled
5481 # * @project_list = fill_project_list_info(\@project_list)
5482 #   ensures that all fields are filled (and invalid projects removed)
5483 #
5484 # NOTE: modifies $projlist, but does not remove entries from it
5485 sub fill_project_list_info {
5486         my ($projlist, @wanted_keys) = @_;
5487         my @projects;
5488         my $filter_set = sub { return @_; };
5489         if (@wanted_keys) {
5490                 my %wanted_keys = map { $_ => 1 } @wanted_keys;
5491                 $filter_set = sub { return grep { $wanted_keys{$_} } @_; };
5492         }
5493
5494         my $show_ctags = gitweb_check_feature('ctags');
5495  PROJECT:
5496         foreach my $pr (@$projlist) {
5497                 if (project_info_needs_filling($pr, $filter_set->('age', 'age_string'))) {
5498                         my (@activity) = git_get_last_activity($pr->{'path'});
5499                         unless (@activity) {
5500                                 next PROJECT;
5501                         }
5502                         ($pr->{'age'}, $pr->{'age_string'}) = @activity;
5503                 }
5504                 if (project_info_needs_filling($pr, $filter_set->('descr', 'descr_long'))) {
5505                         my $descr = git_get_project_description($pr->{'path'}) || "";
5506                         $descr = to_utf8($descr);
5507                         $pr->{'descr_long'} = $descr;
5508                         $pr->{'descr'} = chop_str($descr, $projects_list_description_width, 5);
5509                 }
5510                 if (project_info_needs_filling($pr, $filter_set->('owner'))) {
5511                         $pr->{'owner'} = git_get_project_owner("$pr->{'path'}") || "";
5512                 }
5513                 if ($show_ctags &&
5514                     project_info_needs_filling($pr, $filter_set->('ctags'))) {
5515                         $pr->{'ctags'} = git_get_project_ctags($pr->{'path'});
5516                 }
5517                 if ($projects_list_group_categories &&
5518                     project_info_needs_filling($pr, $filter_set->('category'))) {
5519                         my $cat = git_get_project_category($pr->{'path'}) ||
5520                                                            $project_list_default_category;
5521                         $pr->{'category'} = to_utf8($cat);
5522                 }
5523
5524                 push @projects, $pr;
5525         }
5526
5527         return @projects;
5528 }
5529
5530 sub sort_projects_list {
5531         my ($projlist, $order) = @_;
5532
5533         sub order_str {
5534                 my $key = shift;
5535                 return sub { $a->{$key} cmp $b->{$key} };
5536         }
5537
5538         sub order_num_then_undef {
5539                 my $key = shift;
5540                 return sub {
5541                         defined $a->{$key} ?
5542                                 (defined $b->{$key} ? $a->{$key} <=> $b->{$key} : -1) :
5543                                 (defined $b->{$key} ? 1 : 0)
5544                 };
5545         }
5546
5547         my %orderings = (
5548                 project => order_str('path'),
5549                 descr => order_str('descr_long'),
5550                 owner => order_str('owner'),
5551                 age => order_num_then_undef('age'),
5552         );
5553
5554         my $ordering = $orderings{$order};
5555         return defined $ordering ? sort $ordering @$projlist : @$projlist;
5556 }
5557
5558 # returns a hash of categories, containing the list of project
5559 # belonging to each category
5560 sub build_projlist_by_category {
5561         my ($projlist, $from, $to) = @_;
5562         my %categories;
5563
5564         $from = 0 unless defined $from;
5565         $to = $#$projlist if (!defined $to || $#$projlist < $to);
5566
5567         for (my $i = $from; $i <= $to; $i++) {
5568                 my $pr = $projlist->[$i];
5569                 push @{$categories{ $pr->{'category'} }}, $pr;
5570         }
5571
5572         return wantarray ? %categories : \%categories;
5573 }
5574
5575 # print 'sort by' <th> element, generating 'sort by $name' replay link
5576 # if that order is not selected
5577 sub print_sort_th {
5578         print format_sort_th(@_);
5579 }
5580
5581 sub format_sort_th {
5582         my ($name, $order, $header) = @_;
5583         my $sort_th = "";
5584         $header ||= ucfirst($name);
5585
5586         if ($order eq $name) {
5587                 $sort_th .= "<th>$header</th>\n";
5588         } else {
5589                 $sort_th .= "<th>" .
5590                             $cgi->a({-href => href(-replay=>1, order=>$name),
5591                                      -class => "header"}, $header) .
5592                             "</th>\n";
5593         }
5594
5595         return $sort_th;
5596 }
5597
5598 sub git_project_list_rows {
5599         my ($projlist, $from, $to, $check_forks) = @_;
5600
5601         $from = 0 unless defined $from;
5602         $to = $#$projlist if (!defined $to || $#$projlist < $to);
5603
5604         my $alternate = 1;
5605         for (my $i = $from; $i <= $to; $i++) {
5606                 my $pr = $projlist->[$i];
5607
5608                 if ($alternate) {
5609                         print "<tr class=\"dark\">\n";
5610                 } else {
5611                         print "<tr class=\"light\">\n";
5612                 }
5613                 $alternate ^= 1;
5614
5615                 if ($check_forks) {
5616                         print "<td>";
5617                         if ($pr->{'forks'}) {
5618                                 my $nforks = scalar @{$pr->{'forks'}};
5619                                 if ($nforks > 0) {
5620                                         print $cgi->a({-href => href(project=>$pr->{'path'}, action=>"forks"),
5621                                                        -title => "$nforks forks"}, "+");
5622                                 } else {
5623                                         print $cgi->span({-title => "$nforks forks"}, "+");
5624                                 }
5625                         }
5626                         print "</td>\n";
5627                 }
5628                 print "<td>" . $cgi->a({-href => href(project=>$pr->{'path'}, action=>"summary"),
5629                                         -class => "list"},
5630                                        esc_html_match_hl($pr->{'path'}, $search_regexp)) .
5631                       "</td>\n" .
5632                       "<td>" . $cgi->a({-href => href(project=>$pr->{'path'}, action=>"summary"),
5633                                         -class => "list",
5634                                         -title => $pr->{'descr_long'}},
5635                                         $search_regexp
5636                                         ? esc_html_match_hl_chopped($pr->{'descr_long'},
5637                                                                     $pr->{'descr'}, $search_regexp)
5638                                         : esc_html($pr->{'descr'})) .
5639                       "</td>\n";
5640                 unless ($omit_owner) {
5641                         print "<td><i>" . chop_and_escape_str($pr->{'owner'}, 15) . "</i></td>\n";
5642                 }
5643                 unless ($omit_age_column) {
5644                         print "<td class=\"". age_class($pr->{'age'}) . "\">" .
5645                             (defined $pr->{'age_string'} ? $pr->{'age_string'} : "No commits") . "</td>\n";
5646                 }
5647                 print"<td class=\"link\">" .
5648                       $cgi->a({-href => href(project=>$pr->{'path'}, action=>"summary")}, "summary")   . " | " .
5649                       $cgi->a({-href => href(project=>$pr->{'path'}, action=>"shortlog")}, "shortlog") . " | " .
5650                       $cgi->a({-href => href(project=>$pr->{'path'}, action=>"log")}, "log") . " | " .
5651                       $cgi->a({-href => href(project=>$pr->{'path'}, action=>"tree")}, "tree") .
5652                       ($pr->{'forks'} ? " | " . $cgi->a({-href => href(project=>$pr->{'path'}, action=>"forks")}, "forks") : '') .
5653                       "</td>\n" .
5654                       "</tr>\n";
5655         }
5656 }
5657
5658 sub git_project_list_body {
5659         # actually uses global variable $project
5660         my ($projlist, $order, $from, $to, $extra, $no_header) = @_;
5661         my @projects = @$projlist;
5662
5663         my $check_forks = gitweb_check_feature('forks');
5664         my $show_ctags  = gitweb_check_feature('ctags');
5665         my $tagfilter = $show_ctags ? $input_params{'ctag'} : undef;
5666         $check_forks = undef
5667                 if ($tagfilter || $search_regexp);
5668
5669         # filtering out forks before filling info allows to do less work
5670         @projects = filter_forks_from_projects_list(\@projects)
5671                 if ($check_forks);
5672         # search_projects_list pre-fills required info
5673         @projects = search_projects_list(\@projects,
5674                                          'search_regexp' => $search_regexp,
5675                                          'tagfilter'  => $tagfilter)
5676                 if ($tagfilter || $search_regexp);
5677         # fill the rest
5678         my @all_fields = ('descr', 'descr_long', 'ctags', 'category');
5679         push @all_fields, ('age', 'age_string') unless($omit_age_column);
5680         push @all_fields, 'owner' unless($omit_owner);
5681         @projects = fill_project_list_info(\@projects, @all_fields);
5682
5683         $order ||= $default_projects_order;
5684         $from = 0 unless defined $from;
5685         $to = $#projects if (!defined $to || $#projects < $to);
5686
5687         # short circuit
5688         if ($from > $to) {
5689                 print "<center>\n".
5690                       "<b>No such projects found</b><br />\n".
5691                       "Click ".$cgi->a({-href=>href(project=>undef)},"here")." to view all projects<br />\n".
5692                       "</center>\n<br />\n";
5693                 return;
5694         }
5695
5696         @projects = sort_projects_list(\@projects, $order);
5697
5698         if ($show_ctags) {
5699                 my $ctags = git_gather_all_ctags(\@projects);
5700                 my $cloud = git_populate_project_tagcloud($ctags);
5701                 print git_show_project_tagcloud($cloud, 64);
5702         }
5703
5704         print "<table class=\"project_list\">\n";
5705         unless ($no_header) {
5706                 print "<tr>\n";
5707                 if ($check_forks) {
5708                         print "<th></th>\n";
5709                 }
5710                 print_sort_th('project', $order, 'Project');
5711                 print_sort_th('descr', $order, 'Description');
5712                 print_sort_th('owner', $order, 'Owner') unless $omit_owner;
5713                 print_sort_th('age', $order, 'Last Change') unless $omit_age_column;
5714                 print "<th></th>\n" . # for links
5715                       "</tr>\n";
5716         }
5717
5718         if ($projects_list_group_categories) {
5719                 # only display categories with projects in the $from-$to window
5720                 @projects = sort {$a->{'category'} cmp $b->{'category'}} @projects[$from..$to];
5721                 my %categories = build_projlist_by_category(\@projects, $from, $to);
5722                 foreach my $cat (sort keys %categories) {
5723                         unless ($cat eq "") {
5724                                 print "<tr>\n";
5725                                 if ($check_forks) {
5726                                         print "<td></td>\n";
5727                                 }
5728                                 print "<td class=\"category\" colspan=\"5\">".esc_html($cat)."</td>\n";
5729                                 print "</tr>\n";
5730                         }
5731
5732                         git_project_list_rows($categories{$cat}, undef, undef, $check_forks);
5733                 }
5734         } else {
5735                 git_project_list_rows(\@projects, $from, $to, $check_forks);
5736         }
5737
5738         if (defined $extra) {
5739                 print "<tr>\n";
5740                 if ($check_forks) {
5741                         print "<td></td>\n";
5742                 }
5743                 print "<td colspan=\"5\">$extra</td>\n" .
5744                       "</tr>\n";
5745         }
5746         print "</table>\n";
5747 }
5748
5749 sub git_log_body {
5750         # uses global variable $project
5751         my ($commitlist, $from, $to, $refs, $extra) = @_;
5752
5753         $from = 0 unless defined $from;
5754         $to = $#{$commitlist} if (!defined $to || $#{$commitlist} < $to);
5755
5756         for (my $i = 0; $i <= $to; $i++) {
5757                 my %co = %{$commitlist->[$i]};
5758                 next if !%co;
5759                 my $commit = $co{'id'};
5760                 my $ref = format_ref_marker($refs, $commit);
5761                 git_print_header_div('commit',
5762                                "<span class=\"age\">$co{'age_string'}</span>" .
5763                                esc_html($co{'title'}) . $ref,
5764                                $commit);
5765                 print "<div class=\"title_text\">\n" .
5766                       "<div class=\"log_link\">\n" .
5767                       $cgi->a({-href => href(action=>"commit", hash=>$commit)}, "commit") .
5768                       " | " .
5769                       $cgi->a({-href => href(action=>"commitdiff", hash=>$commit)}, "commitdiff") .
5770                       " | " .
5771                       $cgi->a({-href => href(action=>"tree", hash=>$commit, hash_base=>$commit)}, "tree") .
5772                       "<br/>\n" .
5773                       "</div>\n";
5774                       git_print_authorship(\%co, -tag => 'span');
5775                       print "<br/>\n</div>\n";
5776
5777                 print "<div class=\"log_body\">\n";
5778                 git_print_log($co{'comment'}, -final_empty_line=> 1);
5779                 print "</div>\n";
5780         }
5781         if ($extra) {
5782                 print "<div class=\"page_nav\">\n";
5783                 print "$extra\n";
5784                 print "</div>\n";
5785         }
5786 }
5787
5788 sub git_shortlog_body {
5789         # uses global variable $project
5790         my ($commitlist, $from, $to, $refs, $extra) = @_;
5791
5792         $from = 0 unless defined $from;
5793         $to = $#{$commitlist} if (!defined $to || $#{$commitlist} < $to);
5794
5795         print "<table class=\"shortlog\">\n";
5796         my $alternate = 1;
5797         for (my $i = $from; $i <= $to; $i++) {
5798                 my %co = %{$commitlist->[$i]};
5799                 my $commit = $co{'id'};
5800                 my $ref = format_ref_marker($refs, $commit);
5801                 if ($alternate) {
5802                         print "<tr class=\"dark\">\n";
5803                 } else {
5804                         print "<tr class=\"light\">\n";
5805                 }
5806                 $alternate ^= 1;
5807                 # git_summary() used print "<td><i>$co{'age_string'}</i></td>\n" .
5808                 print "<td title=\"$co{'age_string_age'}\"><i>$co{'age_string_date'}</i></td>\n" .
5809                       format_author_html('td', \%co, 10) . "<td>";
5810                 print format_subject_html($co{'title'}, $co{'title_short'},
5811                                           href(action=>"commit", hash=>$commit), $ref);
5812                 print "</td>\n" .
5813                       "<td class=\"link\">" .
5814                       $cgi->a({-href => href(action=>"commit", hash=>$commit)}, "commit") . " | " .
5815                       $cgi->a({-href => href(action=>"commitdiff", hash=>$commit)}, "commitdiff") . " | " .
5816                       $cgi->a({-href => href(action=>"tree", hash=>$commit, hash_base=>$commit)}, "tree");
5817                 my $snapshot_links = format_snapshot_links($commit);
5818                 if (defined $snapshot_links) {
5819                         print " | " . $snapshot_links;
5820                 }
5821                 print "</td>\n" .
5822                       "</tr>\n";
5823         }
5824         if (defined $extra) {
5825                 print "<tr>\n" .
5826                       "<td colspan=\"4\">$extra</td>\n" .
5827                       "</tr>\n";
5828         }
5829         print "</table>\n";
5830 }
5831
5832 sub git_history_body {
5833         # Warning: assumes constant type (blob or tree) during history
5834         my ($commitlist, $from, $to, $refs, $extra,
5835             $file_name, $file_hash, $ftype) = @_;
5836
5837         $from = 0 unless defined $from;
5838         $to = $#{$commitlist} unless (defined $to && $to <= $#{$commitlist});
5839
5840         print "<table class=\"history\">\n";
5841         my $alternate = 1;
5842         for (my $i = $from; $i <= $to; $i++) {
5843                 my %co = %{$commitlist->[$i]};
5844                 if (!%co) {
5845                         next;
5846                 }
5847                 my $commit = $co{'id'};
5848
5849                 my $ref = format_ref_marker($refs, $commit);
5850
5851                 if ($alternate) {
5852                         print "<tr class=\"dark\">\n";
5853                 } else {
5854                         print "<tr class=\"light\">\n";
5855                 }
5856                 $alternate ^= 1;
5857                 print "<td title=\"$co{'age_string_age'}\"><i>$co{'age_string_date'}</i></td>\n" .
5858         # shortlog:   format_author_html('td', \%co, 10)
5859                       format_author_html('td', \%co, 15, 3) . "<td>";
5860                 # originally git_history used chop_str($co{'title'}, 50)
5861                 print format_subject_html($co{'title'}, $co{'title_short'},
5862                                           href(action=>"commit", hash=>$commit), $ref);
5863                 print "</td>\n" .
5864                       "<td class=\"link\">" .
5865                       $cgi->a({-href => href(action=>$ftype, hash_base=>$commit, file_name=>$file_name)}, $ftype) . " | " .
5866                       $cgi->a({-href => href(action=>"commitdiff", hash=>$commit)}, "commitdiff");
5867
5868                 if ($ftype eq 'blob') {
5869                         my $blob_current = $file_hash;
5870                         my $blob_parent  = git_get_hash_by_path($commit, $file_name);
5871                         if (defined $blob_current && defined $blob_parent &&
5872                                         $blob_current ne $blob_parent) {
5873                                 print " | " .
5874                                         $cgi->a({-href => href(action=>"blobdiff",
5875                                                                hash=>$blob_current, hash_parent=>$blob_parent,
5876                                                                hash_base=>$hash_base, hash_parent_base=>$commit,
5877                                                                file_name=>$file_name)},
5878                                                 "diff to current");
5879                         }
5880                 }
5881                 print "</td>\n" .
5882                       "</tr>\n";
5883         }
5884         if (defined $extra) {
5885                 print "<tr>\n" .
5886                       "<td colspan=\"4\">$extra</td>\n" .
5887                       "</tr>\n";
5888         }
5889         print "</table>\n";
5890 }
5891
5892 sub git_tags_body {
5893         # uses global variable $project
5894         my ($taglist, $from, $to, $extra) = @_;
5895         $from = 0 unless defined $from;
5896         $to = $#{$taglist} if (!defined $to || $#{$taglist} < $to);
5897
5898         print "<table class=\"tags\">\n";
5899         my $alternate = 1;
5900         for (my $i = $from; $i <= $to; $i++) {
5901                 my $entry = $taglist->[$i];
5902                 my %tag = %$entry;
5903                 my $comment = $tag{'subject'};
5904                 my $comment_short;
5905                 if (defined $comment) {
5906                         $comment_short = chop_str($comment, 30, 5);
5907                 }
5908                 if ($alternate) {
5909                         print "<tr class=\"dark\">\n";
5910                 } else {
5911                         print "<tr class=\"light\">\n";
5912                 }
5913                 $alternate ^= 1;
5914                 if (defined $tag{'age'}) {
5915                         print "<td><i>$tag{'age'}</i></td>\n";
5916                 } else {
5917                         print "<td></td>\n";
5918                 }
5919                 print "<td>" .
5920                       $cgi->a({-href => href(action=>$tag{'reftype'}, hash=>$tag{'refid'}),
5921                                -class => "list name"}, esc_html($tag{'name'})) .
5922                       "</td>\n" .
5923                       "<td>";
5924                 if (defined $comment) {
5925                         print format_subject_html($comment, $comment_short,
5926                                                   href(action=>"tag", hash=>$tag{'id'}));
5927                 }
5928                 print "</td>\n" .
5929                       "<td class=\"selflink\">";
5930                 if ($tag{'type'} eq "tag") {
5931                         print $cgi->a({-href => href(action=>"tag", hash=>$tag{'id'})}, "tag");
5932                 } else {
5933                         print "&nbsp;";
5934                 }
5935                 print "</td>\n" .
5936                       "<td class=\"link\">" . " | " .
5937                       $cgi->a({-href => href(action=>$tag{'reftype'}, hash=>$tag{'refid'})}, $tag{'reftype'});
5938                 if ($tag{'reftype'} eq "commit") {
5939                         print " | " . $cgi->a({-href => href(action=>"shortlog", hash=>$tag{'fullname'})}, "shortlog") .
5940                               " | " . $cgi->a({-href => href(action=>"log", hash=>$tag{'fullname'})}, "log");
5941                 } elsif ($tag{'reftype'} eq "blob") {
5942                         print " | " . $cgi->a({-href => href(action=>"blob_plain", hash=>$tag{'refid'})}, "raw");
5943                 }
5944                 print "</td>\n" .
5945                       "</tr>";
5946         }
5947         if (defined $extra) {
5948                 print "<tr>\n" .
5949                       "<td colspan=\"5\">$extra</td>\n" .
5950                       "</tr>\n";
5951         }
5952         print "</table>\n";
5953 }
5954
5955 sub git_heads_body {
5956         # uses global variable $project
5957         my ($headlist, $head_at, $from, $to, $extra) = @_;
5958         $from = 0 unless defined $from;
5959         $to = $#{$headlist} if (!defined $to || $#{$headlist} < $to);
5960
5961         print "<table class=\"heads\">\n";
5962         my $alternate = 1;
5963         for (my $i = $from; $i <= $to; $i++) {
5964                 my $entry = $headlist->[$i];
5965                 my %ref = %$entry;
5966                 my $curr = defined $head_at && $ref{'id'} eq $head_at;
5967                 if ($alternate) {
5968                         print "<tr class=\"dark\">\n";
5969                 } else {
5970                         print "<tr class=\"light\">\n";
5971                 }
5972                 $alternate ^= 1;
5973                 print "<td><i>$ref{'age'}</i></td>\n" .
5974                       ($curr ? "<td class=\"current_head\">" : "<td>") .
5975                       $cgi->a({-href => href(action=>"shortlog", hash=>$ref{'fullname'}),
5976                                -class => "list name"},esc_html($ref{'name'})) .
5977                       "</td>\n" .
5978                       "<td class=\"link\">" .
5979                       $cgi->a({-href => href(action=>"shortlog", hash=>$ref{'fullname'})}, "shortlog") . " | " .
5980                       $cgi->a({-href => href(action=>"log", hash=>$ref{'fullname'})}, "log") . " | " .
5981                       $cgi->a({-href => href(action=>"tree", hash=>$ref{'fullname'}, hash_base=>$ref{'fullname'})}, "tree") .
5982                       "</td>\n" .
5983                       "</tr>";
5984         }
5985         if (defined $extra) {
5986                 print "<tr>\n" .
5987                       "<td colspan=\"3\">$extra</td>\n" .
5988                       "</tr>\n";
5989         }
5990         print "</table>\n";
5991 }
5992
5993 # Display a single remote block
5994 sub git_remote_block {
5995         my ($remote, $rdata, $limit, $head) = @_;
5996
5997         my $heads = $rdata->{'heads'};
5998         my $fetch = $rdata->{'fetch'};
5999         my $push = $rdata->{'push'};
6000
6001         my $urls_table = "<table class=\"projects_list\">\n" ;
6002
6003         if (defined $fetch) {
6004                 if ($fetch eq $push) {
6005                         $urls_table .= format_repo_url("URL", $fetch);
6006                 } else {
6007                         $urls_table .= format_repo_url("Fetch URL", $fetch);
6008                         $urls_table .= format_repo_url("Push URL", $push) if defined $push;
6009                 }
6010         } elsif (defined $push) {
6011                 $urls_table .= format_repo_url("Push URL", $push);
6012         } else {
6013                 $urls_table .= format_repo_url("", "No remote URL");
6014         }
6015
6016         $urls_table .= "</table>\n";
6017
6018         my $dots;
6019         if (defined $limit && $limit < @$heads) {
6020                 $dots = $cgi->a({-href => href(action=>"remotes", hash=>$remote)}, "...");
6021         }
6022
6023         print $urls_table;
6024         git_heads_body($heads, $head, 0, $limit, $dots);
6025 }
6026
6027 # Display a list of remote names with the respective fetch and push URLs
6028 sub git_remotes_list {
6029         my ($remotedata, $limit) = @_;
6030         print "<table class=\"heads\">\n";
6031         my $alternate = 1;
6032         my @remotes = sort keys %$remotedata;
6033
6034         my $limited = $limit && $limit < @remotes;
6035
6036         $#remotes = $limit - 1 if $limited;
6037
6038         while (my $remote = shift @remotes) {
6039                 my $rdata = $remotedata->{$remote};
6040                 my $fetch = $rdata->{'fetch'};
6041                 my $push = $rdata->{'push'};
6042                 if ($alternate) {
6043                         print "<tr class=\"dark\">\n";
6044                 } else {
6045                         print "<tr class=\"light\">\n";
6046                 }
6047                 $alternate ^= 1;
6048                 print "<td>" .
6049                       $cgi->a({-href=> href(action=>'remotes', hash=>$remote),
6050                                -class=> "list name"},esc_html($remote)) .
6051                       "</td>";
6052                 print "<td class=\"link\">" .
6053                       (defined $fetch ? $cgi->a({-href=> $fetch}, "fetch") : "fetch") .
6054                       " | " .
6055                       (defined $push ? $cgi->a({-href=> $push}, "push") : "push") .
6056                       "</td>";
6057
6058                 print "</tr>\n";
6059         }
6060
6061         if ($limited) {
6062                 print "<tr>\n" .
6063                       "<td colspan=\"3\">" .
6064                       $cgi->a({-href => href(action=>"remotes")}, "...") .
6065                       "</td>\n" . "</tr>\n";
6066         }
6067
6068         print "</table>";
6069 }
6070
6071 # Display remote heads grouped by remote, unless there are too many
6072 # remotes, in which case we only display the remote names
6073 sub git_remotes_body {
6074         my ($remotedata, $limit, $head) = @_;
6075         if ($limit and $limit < keys %$remotedata) {
6076                 git_remotes_list($remotedata, $limit);
6077         } else {
6078                 fill_remote_heads($remotedata);
6079                 while (my ($remote, $rdata) = each %$remotedata) {
6080                         git_print_section({-class=>"remote", -id=>$remote},
6081                                 ["remotes", $remote, $remote], sub {
6082                                         git_remote_block($remote, $rdata, $limit, $head);
6083                                 });
6084                 }
6085         }
6086 }
6087
6088 sub git_search_message {
6089         my %co = @_;
6090
6091         my $greptype;
6092         if ($searchtype eq 'commit') {
6093                 $greptype = "--grep=";
6094         } elsif ($searchtype eq 'author') {
6095                 $greptype = "--author=";
6096         } elsif ($searchtype eq 'committer') {
6097                 $greptype = "--committer=";
6098         }
6099         $greptype .= $searchtext;
6100         my @commitlist = parse_commits($hash, 101, (100 * $page), undef,
6101                                        $greptype, '--regexp-ignore-case',
6102                                        $search_use_regexp ? '--extended-regexp' : '--fixed-strings');
6103
6104         my $paging_nav = '';
6105         if ($page > 0) {
6106                 $paging_nav .=
6107                         $cgi->a({-href => href(-replay=>1, page=>undef)},
6108                                 "first") .
6109                         " &sdot; " .
6110                         $cgi->a({-href => href(-replay=>1, page=>$page-1),
6111                                  -accesskey => "p", -title => "Alt-p"}, "prev");
6112         } else {
6113                 $paging_nav .= "first &sdot; prev";
6114         }
6115         my $next_link = '';
6116         if ($#commitlist >= 100) {
6117                 $next_link =
6118                         $cgi->a({-href => href(-replay=>1, page=>$page+1),
6119                                  -accesskey => "n", -title => "Alt-n"}, "next");
6120                 $paging_nav .= " &sdot; $next_link";
6121         } else {
6122                 $paging_nav .= " &sdot; next";
6123         }
6124
6125         git_header_html();
6126
6127         git_print_page_nav('','', $hash,$co{'tree'},$hash, $paging_nav);
6128         git_print_header_div('commit', esc_html($co{'title'}), $hash);
6129         if ($page == 0 && !@commitlist) {
6130                 print "<p>No match.</p>\n";
6131         } else {
6132                 git_search_grep_body(\@commitlist, 0, 99, $next_link);
6133         }
6134
6135         git_footer_html();
6136 }
6137
6138 sub git_search_changes {
6139         my %co = @_;
6140
6141         local $/ = "\n";
6142         open my $fd, '-|', git_cmd(), '--no-pager', 'log', @diff_opts,
6143                 '--pretty=format:%H', '--no-abbrev', '--raw', "-S$searchtext",
6144                 ($search_use_regexp ? '--pickaxe-regex' : ())
6145                         or die_error(500, "Open git-log failed");
6146
6147         git_header_html();
6148
6149         git_print_page_nav('','', $hash,$co{'tree'},$hash);
6150         git_print_header_div('commit', esc_html($co{'title'}), $hash);
6151
6152         print "<table class=\"pickaxe search\">\n";
6153         my $alternate = 1;
6154         undef %co;
6155         my @files;
6156         while (my $line = <$fd>) {
6157                 chomp $line;
6158                 next unless $line;
6159
6160                 my %set = parse_difftree_raw_line($line);
6161                 if (defined $set{'commit'}) {
6162                         # finish previous commit
6163                         if (%co) {
6164                                 print "</td>\n" .
6165                                       "<td class=\"link\">" .
6166                                       $cgi->a({-href => href(action=>"commit", hash=>$co{'id'})},
6167                                               "commit") .
6168                                       " | " .
6169                                       $cgi->a({-href => href(action=>"tree", hash=>$co{'tree'},
6170                                                              hash_base=>$co{'id'})},
6171                                               "tree") .
6172                                       "</td>\n" .
6173                                       "</tr>\n";
6174                         }
6175
6176                         if ($alternate) {
6177                                 print "<tr class=\"dark\">\n";
6178                         } else {
6179                                 print "<tr class=\"light\">\n";
6180                         }
6181                         $alternate ^= 1;
6182                         %co = parse_commit($set{'commit'});
6183                         my $author = chop_and_escape_str($co{'author_name'}, 15, 5);
6184                         print "<td title=\"$co{'age_string_age'}\"><i>$co{'age_string_date'}</i></td>\n" .
6185                               "<td><i>$author</i></td>\n" .
6186                               "<td>" .
6187                               $cgi->a({-href => href(action=>"commit", hash=>$co{'id'}),
6188                                       -class => "list subject"},
6189                                       chop_and_escape_str($co{'title'}, 50) . "<br/>");
6190                 } elsif (defined $set{'to_id'}) {
6191                         next if ($set{'to_id'} =~ m/^0{40}$/);
6192
6193                         print $cgi->a({-href => href(action=>"blob", hash_base=>$co{'id'},
6194                                                      hash=>$set{'to_id'}, file_name=>$set{'to_file'}),
6195                                       -class => "list"},
6196                                       "<span class=\"match\">" . esc_path($set{'file'}) . "</span>") .
6197                               "<br/>\n";
6198                 }
6199         }
6200         close $fd;
6201
6202         # finish last commit (warning: repetition!)
6203         if (%co) {
6204                 print "</td>\n" .
6205                       "<td class=\"link\">" .
6206                       $cgi->a({-href => href(action=>"commit", hash=>$co{'id'})},
6207                               "commit") .
6208                       " | " .
6209                       $cgi->a({-href => href(action=>"tree", hash=>$co{'tree'},
6210                                              hash_base=>$co{'id'})},
6211                               "tree") .
6212                       "</td>\n" .
6213                       "</tr>\n";
6214         }
6215
6216         print "</table>\n";
6217
6218         git_footer_html();
6219 }
6220
6221 sub git_search_files {
6222         my %co = @_;
6223
6224         local $/ = "\n";
6225         open my $fd, "-|", git_cmd(), 'grep', '-n', '-z',
6226                 $search_use_regexp ? ('-E', '-i') : '-F',
6227                 $searchtext, $co{'tree'}
6228                         or die_error(500, "Open git-grep failed");
6229
6230         git_header_html();
6231
6232         git_print_page_nav('','', $hash,$co{'tree'},$hash);
6233         git_print_header_div('commit', esc_html($co{'title'}), $hash);
6234
6235         print "<table class=\"grep_search\">\n";
6236         my $alternate = 1;
6237         my $matches = 0;
6238         my $lastfile = '';
6239         my $file_href;
6240         while (my $line = <$fd>) {
6241                 chomp $line;
6242                 my ($file, $lno, $ltext, $binary);
6243                 last if ($matches++ > 1000);
6244                 if ($line =~ /^Binary file (.+) matches$/) {
6245                         $file = $1;
6246                         $binary = 1;
6247                 } else {
6248                         ($file, $lno, $ltext) = split(/\0/, $line, 3);
6249                         $file =~ s/^$co{'tree'}://;
6250                 }
6251                 if ($file ne $lastfile) {
6252                         $lastfile and print "</td></tr>\n";
6253                         if ($alternate++) {
6254                                 print "<tr class=\"dark\">\n";
6255                         } else {
6256                                 print "<tr class=\"light\">\n";
6257                         }
6258                         $file_href = href(action=>"blob", hash_base=>$co{'id'},
6259                                           file_name=>$file);
6260                         print "<td class=\"list\">".
6261                                 $cgi->a({-href => $file_href, -class => "list"}, esc_path($file));
6262                         print "</td><td>\n";
6263                         $lastfile = $file;
6264                 }
6265                 if ($binary) {
6266                         print "<div class=\"binary\">Binary file</div>\n";
6267                 } else {
6268                         $ltext = untabify($ltext);
6269                         if ($ltext =~ m/^(.*)($search_regexp)(.*)$/i) {
6270                                 $ltext = esc_html($1, -nbsp=>1);
6271                                 $ltext .= '<span class="match">';
6272                                 $ltext .= esc_html($2, -nbsp=>1);
6273                                 $ltext .= '</span>';
6274                                 $ltext .= esc_html($3, -nbsp=>1);
6275                         } else {
6276                                 $ltext = esc_html($ltext, -nbsp=>1);
6277                         }
6278                         print "<div class=\"pre\">" .
6279                                 $cgi->a({-href => $file_href.'#l'.$lno,
6280                                         -class => "linenr"}, sprintf('%4i', $lno)) .
6281                                 ' ' .  $ltext . "</div>\n";
6282                 }
6283         }
6284         if ($lastfile) {
6285                 print "</td></tr>\n";
6286                 if ($matches > 1000) {
6287                         print "<div class=\"diff nodifferences\">Too many matches, listing trimmed</div>\n";
6288                 }
6289         } else {
6290                 print "<div class=\"diff nodifferences\">No matches found</div>\n";
6291         }
6292         close $fd;
6293
6294         print "</table>\n";
6295
6296         git_footer_html();
6297 }
6298
6299 sub git_search_grep_body {
6300         my ($commitlist, $from, $to, $extra) = @_;
6301         $from = 0 unless defined $from;
6302         $to = $#{$commitlist} if (!defined $to || $#{$commitlist} < $to);
6303
6304         print "<table class=\"commit_search\">\n";
6305         my $alternate = 1;
6306         for (my $i = $from; $i <= $to; $i++) {
6307                 my %co = %{$commitlist->[$i]};
6308                 if (!%co) {
6309                         next;
6310                 }
6311                 my $commit = $co{'id'};
6312                 if ($alternate) {
6313                         print "<tr class=\"dark\">\n";
6314                 } else {
6315                         print "<tr class=\"light\">\n";
6316                 }
6317                 $alternate ^= 1;
6318                 print "<td title=\"$co{'age_string_age'}\"><i>$co{'age_string_date'}</i></td>\n" .
6319                       format_author_html('td', \%co, 15, 5) .
6320                       "<td>" .
6321                       $cgi->a({-href => href(action=>"commit", hash=>$co{'id'}),
6322                                -class => "list subject"},
6323                               chop_and_escape_str($co{'title'}, 50) . "<br/>");
6324                 my $comment = $co{'comment'};
6325                 foreach my $line (@$comment) {
6326                         if ($line =~ m/^(.*?)($search_regexp)(.*)$/i) {
6327                                 my ($lead, $match, $trail) = ($1, $2, $3);
6328                                 $match = chop_str($match, 70, 5, 'center');
6329                                 my $contextlen = int((80 - length($match))/2);
6330                                 $contextlen = 30 if ($contextlen > 30);
6331                                 $lead  = chop_str($lead,  $contextlen, 10, 'left');
6332                                 $trail = chop_str($trail, $contextlen, 10, 'right');
6333
6334                                 $lead  = esc_html($lead);
6335                                 $match = esc_html($match);
6336                                 $trail = esc_html($trail);
6337
6338                                 print "$lead<span class=\"match\">$match</span>$trail<br />";
6339                         }
6340                 }
6341                 print "</td>\n" .
6342                       "<td class=\"link\">" .
6343                       $cgi->a({-href => href(action=>"commit", hash=>$co{'id'})}, "commit") .
6344                       " | " .
6345                       $cgi->a({-href => href(action=>"commitdiff", hash=>$co{'id'})}, "commitdiff") .
6346                       " | " .
6347                       $cgi->a({-href => href(action=>"tree", hash=>$co{'tree'}, hash_base=>$co{'id'})}, "tree");
6348                 print "</td>\n" .
6349                       "</tr>\n";
6350         }
6351         if (defined $extra) {
6352                 print "<tr>\n" .
6353                       "<td colspan=\"3\">$extra</td>\n" .
6354                       "</tr>\n";
6355         }
6356         print "</table>\n";
6357 }
6358
6359 ## ======================================================================
6360 ## ======================================================================
6361 ## actions
6362
6363 sub git_project_list {
6364         my $order = $input_params{'order'};
6365         if (defined $order && $order !~ m/none|project|descr|owner|age/) {
6366                 die_error(400, "Unknown order parameter");
6367         }
6368
6369         my @list = git_get_projects_list($project_filter, $strict_export);
6370         if (!@list) {
6371                 die_error(404, "No projects found");
6372         }
6373
6374         git_header_html();
6375         if (defined $home_text && -f $home_text) {
6376                 print "<div class=\"index_include\">\n";
6377                 insert_file($home_text);
6378                 print "</div>\n";
6379         }
6380
6381         git_project_search_form($searchtext, $search_use_regexp);
6382         git_project_list_body(\@list, $order);
6383         git_footer_html();
6384 }
6385
6386 sub git_forks {
6387         my $order = $input_params{'order'};
6388         if (defined $order && $order !~ m/none|project|descr|owner|age/) {
6389                 die_error(400, "Unknown order parameter");
6390         }
6391
6392         my $filter = $project;
6393         $filter =~ s/\.git$//;
6394         my @list = git_get_projects_list($filter);
6395         if (!@list) {
6396                 die_error(404, "No forks found");
6397         }
6398
6399         git_header_html();
6400         git_print_page_nav('','');
6401         git_print_header_div('summary', "$project forks");
6402         git_project_list_body(\@list, $order);
6403         git_footer_html();
6404 }
6405
6406 sub git_project_index {
6407         my @projects = git_get_projects_list($project_filter, $strict_export);
6408         if (!@projects) {
6409                 die_error(404, "No projects found");
6410         }
6411
6412         print $cgi->header(
6413                 -type => 'text/plain',
6414                 -charset => 'utf-8',
6415                 -content_disposition => 'inline; filename="index.aux"');
6416
6417         foreach my $pr (@projects) {
6418                 if (!exists $pr->{'owner'}) {
6419                         $pr->{'owner'} = git_get_project_owner("$pr->{'path'}");
6420                 }
6421
6422                 my ($path, $owner) = ($pr->{'path'}, $pr->{'owner'});
6423                 # quote as in CGI::Util::encode, but keep the slash, and use '+' for ' '
6424                 $path  =~ s/([^a-zA-Z0-9_.\-\/ ])/sprintf("%%%02X", ord($1))/eg;
6425                 $owner =~ s/([^a-zA-Z0-9_.\-\/ ])/sprintf("%%%02X", ord($1))/eg;
6426                 $path  =~ s/ /\+/g;
6427                 $owner =~ s/ /\+/g;
6428
6429                 print "$path $owner\n";
6430         }
6431 }
6432
6433 sub git_summary {
6434         my $descr = git_get_project_description($project) || "none";
6435         my %co = parse_commit("HEAD");
6436         my %cd = %co ? parse_date($co{'committer_epoch'}, $co{'committer_tz'}) : ();
6437         my $head = $co{'id'};
6438         my $remote_heads = gitweb_check_feature('remote_heads');
6439
6440         my $owner = git_get_project_owner($project);
6441
6442         my $refs = git_get_references();
6443         # These get_*_list functions return one more to allow us to see if
6444         # there are more ...
6445         my @taglist  = git_get_tags_list(16);
6446         my @headlist = git_get_heads_list(16);
6447         my %remotedata = $remote_heads ? git_get_remotes_list() : ();
6448         my @forklist;
6449         my $check_forks = gitweb_check_feature('forks');
6450
6451         if ($check_forks) {
6452                 # find forks of a project
6453                 my $filter = $project;
6454                 $filter =~ s/\.git$//;
6455                 @forklist = git_get_projects_list($filter);
6456                 # filter out forks of forks
6457                 @forklist = filter_forks_from_projects_list(\@forklist)
6458                         if (@forklist);
6459         }
6460
6461         git_header_html();
6462         git_print_page_nav('summary','', $head);
6463
6464         print "<div class=\"title\">&nbsp;</div>\n";
6465         print "<table class=\"projects_list\">\n" .
6466               "<tr id=\"metadata_desc\"><td>description</td><td>" . esc_html($descr) . "</td></tr>\n";
6467         unless ($omit_owner) {
6468                 print  "<tr id=\"metadata_owner\"><td>owner</td><td>" . esc_html($owner) . "</td></tr>\n";
6469         }
6470         if (defined $cd{'rfc2822'}) {
6471                 print "<tr id=\"metadata_lchange\"><td>last change</td>" .
6472                       "<td>".format_timestamp_html(\%cd)."</td></tr>\n";
6473         }
6474
6475         # use per project git URL list in $projectroot/$project/cloneurl
6476         # or make project git URL from git base URL and project name
6477         my $url_tag = "URL";
6478         my @url_list = git_get_project_url_list($project);
6479         @url_list = map { "$_/$project" } @git_base_url_list unless @url_list;
6480         foreach my $git_url (@url_list) {
6481                 next unless $git_url;
6482                 print format_repo_url($url_tag, $git_url);
6483                 $url_tag = "";
6484         }
6485
6486         # Tag cloud
6487         my $show_ctags = gitweb_check_feature('ctags');
6488         if ($show_ctags) {
6489                 my $ctags = git_get_project_ctags($project);
6490                 if (%$ctags) {
6491                         # without ability to add tags, don't show if there are none
6492                         my $cloud = git_populate_project_tagcloud($ctags);
6493                         print "<tr id=\"metadata_ctags\">" .
6494                               "<td>content tags</td>" .
6495                               "<td>".git_show_project_tagcloud($cloud, 48)."</td>" .
6496                               "</tr>\n";
6497                 }
6498         }
6499
6500         print "</table>\n";
6501
6502         # If XSS prevention is on, we don't include README.html.
6503         # TODO: Allow a readme in some safe format.
6504         if (!$prevent_xss && -s "$projectroot/$project/README.html") {
6505                 print "<div class=\"title\">readme</div>\n" .
6506                       "<div class=\"readme\">\n";
6507                 insert_file("$projectroot/$project/README.html");
6508                 print "\n</div>\n"; # class="readme"
6509         }
6510
6511         # we need to request one more than 16 (0..15) to check if
6512         # those 16 are all
6513         my @commitlist = $head ? parse_commits($head, 17) : ();
6514         if (@commitlist) {
6515                 git_print_header_div('shortlog');
6516                 git_shortlog_body(\@commitlist, 0, 15, $refs,
6517                                   $#commitlist <=  15 ? undef :
6518                                   $cgi->a({-href => href(action=>"shortlog")}, "..."));
6519         }
6520
6521         if (@taglist) {
6522                 git_print_header_div('tags');
6523                 git_tags_body(\@taglist, 0, 15,
6524                               $#taglist <=  15 ? undef :
6525                               $cgi->a({-href => href(action=>"tags")}, "..."));
6526         }
6527
6528         if (@headlist) {
6529                 git_print_header_div('heads');
6530                 git_heads_body(\@headlist, $head, 0, 15,
6531                                $#headlist <= 15 ? undef :
6532                                $cgi->a({-href => href(action=>"heads")}, "..."));
6533         }
6534
6535         if (%remotedata) {
6536                 git_print_header_div('remotes');
6537                 git_remotes_body(\%remotedata, 15, $head);
6538         }
6539
6540         if (@forklist) {
6541                 git_print_header_div('forks');
6542                 git_project_list_body(\@forklist, 'age', 0, 15,
6543                                       $#forklist <= 15 ? undef :
6544                                       $cgi->a({-href => href(action=>"forks")}, "..."),
6545                                       'no_header');
6546         }
6547
6548         git_footer_html();
6549 }
6550
6551 sub git_tag {
6552         my %tag = parse_tag($hash);
6553
6554         if (! %tag) {
6555                 die_error(404, "Unknown tag object");
6556         }
6557
6558         my $head = git_get_head_hash($project);
6559         git_header_html();
6560         git_print_page_nav('','', $head,undef,$head);
6561         git_print_header_div('commit', esc_html($tag{'name'}), $hash);
6562         print "<div class=\"title_text\">\n" .
6563               "<table class=\"object_header\">\n" .
6564               "<tr>\n" .
6565               "<td>object</td>\n" .
6566               "<td>" . $cgi->a({-class => "list", -href => href(action=>$tag{'type'}, hash=>$tag{'object'})},
6567                                $tag{'object'}) . "</td>\n" .
6568               "<td class=\"link\">" . $cgi->a({-href => href(action=>$tag{'type'}, hash=>$tag{'object'})},
6569                                               $tag{'type'}) . "</td>\n" .
6570               "</tr>\n";
6571         if (defined($tag{'author'})) {
6572                 git_print_authorship_rows(\%tag, 'author');
6573         }
6574         print "</table>\n\n" .
6575               "</div>\n";
6576         print "<div class=\"page_body\">";
6577         my $comment = $tag{'comment'};
6578         foreach my $line (@$comment) {
6579                 chomp $line;
6580                 print esc_html($line, -nbsp=>1) . "<br/>\n";
6581         }
6582         print "</div>\n";
6583         git_footer_html();
6584 }
6585
6586 sub git_blame_common {
6587         my $format = shift || 'porcelain';
6588         if ($format eq 'porcelain' && $input_params{'javascript'}) {
6589                 $format = 'incremental';
6590                 $action = 'blame_incremental'; # for page title etc
6591         }
6592
6593         # permissions
6594         gitweb_check_feature('blame')
6595                 or die_error(403, "Blame view not allowed");
6596
6597         # error checking
6598         die_error(400, "No file name given") unless $file_name;
6599         $hash_base ||= git_get_head_hash($project);
6600         die_error(404, "Couldn't find base commit") unless $hash_base;
6601         my %co = parse_commit($hash_base)
6602                 or die_error(404, "Commit not found");
6603         my $ftype = "blob";
6604         if (!defined $hash) {
6605                 $hash = git_get_hash_by_path($hash_base, $file_name, "blob")
6606                         or die_error(404, "Error looking up file");
6607         } else {
6608                 $ftype = git_get_type($hash);
6609                 if ($ftype !~ "blob") {
6610                         die_error(400, "Object is not a blob");
6611                 }
6612         }
6613
6614         my $fd;
6615         if ($format eq 'incremental') {
6616                 # get file contents (as base)
6617                 open $fd, "-|", git_cmd(), 'cat-file', 'blob', $hash
6618                         or die_error(500, "Open git-cat-file failed");
6619         } elsif ($format eq 'data') {
6620                 # run git-blame --incremental
6621                 open $fd, "-|", git_cmd(), "blame", "--incremental",
6622                         $hash_base, "--", $file_name
6623                         or die_error(500, "Open git-blame --incremental failed");
6624         } else {
6625                 # run git-blame --porcelain
6626                 open $fd, "-|", git_cmd(), "blame", '-p',
6627                         $hash_base, '--', $file_name
6628                         or die_error(500, "Open git-blame --porcelain failed");
6629         }
6630
6631         # incremental blame data returns early
6632         if ($format eq 'data') {
6633                 print $cgi->header(
6634                         -type=>"text/plain", -charset => "utf-8",
6635                         -status=> "200 OK");
6636                 local $| = 1; # output autoflush
6637                 while (my $line = <$fd>) {
6638                         print to_utf8($line);
6639                 }
6640                 close $fd
6641                         or print "ERROR $!\n";
6642
6643                 print 'END';
6644                 if (defined $t0 && gitweb_check_feature('timed')) {
6645                         print ' '.
6646                               tv_interval($t0, [ gettimeofday() ]).
6647                               ' '.$number_of_git_cmds;
6648                 }
6649                 print "\n";
6650
6651                 return;
6652         }
6653
6654         # page header
6655         git_header_html();
6656         my $formats_nav =
6657                 $cgi->a({-href => href(action=>"blob", -replay=>1)},
6658                         "blob") .
6659                 " | ";
6660         if ($format eq 'incremental') {
6661                 $formats_nav .=
6662                         $cgi->a({-href => href(action=>"blame", javascript=>0, -replay=>1)},
6663                                 "blame") . " (non-incremental)";
6664         } else {
6665                 $formats_nav .=
6666                         $cgi->a({-href => href(action=>"blame_incremental", -replay=>1)},
6667                                 "blame") . " (incremental)";
6668         }
6669         $formats_nav .=
6670                 " | " .
6671                 $cgi->a({-href => href(action=>"history", -replay=>1)},
6672                         "history") .
6673                 " | " .
6674                 $cgi->a({-href => href(action=>$action, file_name=>$file_name)},
6675                         "HEAD");
6676         git_print_page_nav('','', $hash_base,$co{'tree'},$hash_base, $formats_nav);
6677         git_print_header_div('commit', esc_html($co{'title'}), $hash_base);
6678         git_print_page_path($file_name, $ftype, $hash_base);
6679
6680         # page body
6681         if ($format eq 'incremental') {
6682                 print "<noscript>\n<div class=\"error\"><center><b>\n".
6683                       "This page requires JavaScript to run.\n Use ".
6684                       $cgi->a({-href => href(action=>'blame',javascript=>0,-replay=>1)},
6685                               'this page').
6686                       " instead.\n".
6687                       "</b></center></div>\n</noscript>\n";
6688
6689                 print qq!<div id="progress_bar" style="width: 100%; background-color: yellow"></div>\n!;
6690         }
6691
6692         print qq!<div class="page_body">\n!;
6693         print qq!<div id="progress_info">... / ...</div>\n!
6694                 if ($format eq 'incremental');
6695         print qq!<table id="blame_table" class="blame" width="100%">\n!.
6696               #qq!<col width="5.5em" /><col width="2.5em" /><col width="*" />\n!.
6697               qq!<thead>\n!.
6698               qq!<tr><th>Commit</th><th>Line</th><th>Data</th></tr>\n!.
6699               qq!</thead>\n!.
6700               qq!<tbody>\n!;
6701
6702         my @rev_color = qw(light dark);
6703         my $num_colors = scalar(@rev_color);
6704         my $current_color = 0;
6705
6706         if ($format eq 'incremental') {
6707                 my $color_class = $rev_color[$current_color];
6708
6709                 #contents of a file
6710                 my $linenr = 0;
6711         LINE:
6712                 while (my $line = <$fd>) {
6713                         chomp $line;
6714                         $linenr++;
6715
6716                         print qq!<tr id="l$linenr" class="$color_class">!.
6717                               qq!<td class="sha1"><a href=""> </a></td>!.
6718                               qq!<td class="linenr">!.
6719                               qq!<a class="linenr" href="">$linenr</a></td>!;
6720                         print qq!<td class="pre">! . esc_html($line) . "</td>\n";
6721                         print qq!</tr>\n!;
6722                 }
6723
6724         } else { # porcelain, i.e. ordinary blame
6725                 my %metainfo = (); # saves information about commits
6726
6727                 # blame data
6728         LINE:
6729                 while (my $line = <$fd>) {
6730                         chomp $line;
6731                         # the header: <SHA-1> <src lineno> <dst lineno> [<lines in group>]
6732                         # no <lines in group> for subsequent lines in group of lines
6733                         my ($full_rev, $orig_lineno, $lineno, $group_size) =
6734                            ($line =~ /^([0-9a-f]{40}) (\d+) (\d+)(?: (\d+))?$/);
6735                         if (!exists $metainfo{$full_rev}) {
6736                                 $metainfo{$full_rev} = { 'nprevious' => 0 };
6737                         }
6738                         my $meta = $metainfo{$full_rev};
6739                         my $data;
6740                         while ($data = <$fd>) {
6741                                 chomp $data;
6742                                 last if ($data =~ s/^\t//); # contents of line
6743                                 if ($data =~ /^(\S+)(?: (.*))?$/) {
6744                                         $meta->{$1} = $2 unless exists $meta->{$1};
6745                                 }
6746                                 if ($data =~ /^previous /) {
6747                                         $meta->{'nprevious'}++;
6748                                 }
6749                         }
6750                         my $short_rev = substr($full_rev, 0, 8);
6751                         my $author = $meta->{'author'};
6752                         my %date =
6753                                 parse_date($meta->{'author-time'}, $meta->{'author-tz'});
6754                         my $date = $date{'iso-tz'};
6755                         if ($group_size) {
6756                                 $current_color = ($current_color + 1) % $num_colors;
6757                         }
6758                         my $tr_class = $rev_color[$current_color];
6759                         $tr_class .= ' boundary' if (exists $meta->{'boundary'});
6760                         $tr_class .= ' no-previous' if ($meta->{'nprevious'} == 0);
6761                         $tr_class .= ' multiple-previous' if ($meta->{'nprevious'} > 1);
6762                         print "<tr id=\"l$lineno\" class=\"$tr_class\">\n";
6763                         if ($group_size) {
6764                                 print "<td class=\"sha1\"";
6765                                 print " title=\"". esc_html($author) . ", $date\"";
6766                                 print " rowspan=\"$group_size\"" if ($group_size > 1);
6767                                 print ">";
6768                                 print $cgi->a({-href => href(action=>"commit",
6769                                                              hash=>$full_rev,
6770                                                              file_name=>$file_name)},
6771                                               esc_html($short_rev));
6772                                 if ($group_size >= 2) {
6773                                         my @author_initials = ($author =~ /\b([[:upper:]])\B/g);
6774                                         if (@author_initials) {
6775                                                 print "<br />" .
6776                                                       esc_html(join('', @author_initials));
6777                                                 #           or join('.', ...)
6778                                         }
6779                                 }
6780                                 print "</td>\n";
6781                         }
6782                         # 'previous' <sha1 of parent commit> <filename at commit>
6783                         if (exists $meta->{'previous'} &&
6784                             $meta->{'previous'} =~ /^([a-fA-F0-9]{40}) (.*)$/) {
6785                                 $meta->{'parent'} = $1;
6786                                 $meta->{'file_parent'} = unquote($2);
6787                         }
6788                         my $linenr_commit =
6789                                 exists($meta->{'parent'}) ?
6790                                 $meta->{'parent'} : $full_rev;
6791                         my $linenr_filename =
6792                                 exists($meta->{'file_parent'}) ?
6793                                 $meta->{'file_parent'} : unquote($meta->{'filename'});
6794                         my $blamed = href(action => 'blame',
6795                                           file_name => $linenr_filename,
6796                                           hash_base => $linenr_commit);
6797                         print "<td class=\"linenr\">";
6798                         print $cgi->a({ -href => "$blamed#l$orig_lineno",
6799                                         -class => "linenr" },
6800                                       esc_html($lineno));
6801                         print "</td>";
6802                         print "<td class=\"pre\">" . esc_html($data) . "</td>\n";
6803                         print "</tr>\n";
6804                 } # end while
6805
6806         }
6807
6808         # footer
6809         print "</tbody>\n".
6810               "</table>\n"; # class="blame"
6811         print "</div>\n";   # class="blame_body"
6812         close $fd
6813                 or print "Reading blob failed\n";
6814
6815         git_footer_html();
6816 }
6817
6818 sub git_blame {
6819         git_blame_common();
6820 }
6821
6822 sub git_blame_incremental {
6823         git_blame_common('incremental');
6824 }
6825
6826 sub git_blame_data {
6827         git_blame_common('data');
6828 }
6829
6830 sub git_tags {
6831         my $head = git_get_head_hash($project);
6832         git_header_html();
6833         git_print_page_nav('','', $head,undef,$head,format_ref_views('tags'));
6834         git_print_header_div('summary', $project);
6835
6836         my @tagslist = git_get_tags_list();
6837         if (@tagslist) {
6838                 git_tags_body(\@tagslist);
6839         }
6840         git_footer_html();
6841 }
6842
6843 sub git_heads {
6844         my $head = git_get_head_hash($project);
6845         git_header_html();
6846         git_print_page_nav('','', $head,undef,$head,format_ref_views('heads'));
6847         git_print_header_div('summary', $project);
6848
6849         my @headslist = git_get_heads_list();
6850         if (@headslist) {
6851                 git_heads_body(\@headslist, $head);
6852         }
6853         git_footer_html();
6854 }
6855
6856 # used both for single remote view and for list of all the remotes
6857 sub git_remotes {
6858         gitweb_check_feature('remote_heads')
6859                 or die_error(403, "Remote heads view is disabled");
6860
6861         my $head = git_get_head_hash($project);
6862         my $remote = $input_params{'hash'};
6863
6864         my $remotedata = git_get_remotes_list($remote);
6865         die_error(500, "Unable to get remote information") unless defined $remotedata;
6866
6867         unless (%$remotedata) {
6868                 die_error(404, defined $remote ?
6869                         "Remote $remote not found" :
6870                         "No remotes found");
6871         }
6872
6873         git_header_html(undef, undef, -action_extra => $remote);
6874         git_print_page_nav('', '',  $head, undef, $head,
6875                 format_ref_views($remote ? '' : 'remotes'));
6876
6877         fill_remote_heads($remotedata);
6878         if (defined $remote) {
6879                 git_print_header_div('remotes', "$remote remote for $project");
6880                 git_remote_block($remote, $remotedata->{$remote}, undef, $head);
6881         } else {
6882                 git_print_header_div('summary', "$project remotes");
6883                 git_remotes_body($remotedata, undef, $head);
6884         }
6885
6886         git_footer_html();
6887 }
6888
6889 sub git_blob_plain {
6890         my $type = shift;
6891         my $expires;
6892
6893         if (!defined $hash) {
6894                 if (defined $file_name) {
6895                         my $base = $hash_base || git_get_head_hash($project);
6896                         $hash = git_get_hash_by_path($base, $file_name, "blob")
6897                                 or die_error(404, "Cannot find file");
6898                 } else {
6899                         die_error(400, "No file name defined");
6900                 }
6901         } elsif ($hash =~ m/^[0-9a-fA-F]{40}$/) {
6902                 # blobs defined by non-textual hash id's can be cached
6903                 $expires = "+1d";
6904         }
6905
6906         open my $fd, "-|", git_cmd(), "cat-file", "blob", $hash
6907                 or die_error(500, "Open git-cat-file blob '$hash' failed");
6908
6909         # content-type (can include charset)
6910         $type = blob_contenttype($fd, $file_name, $type);
6911
6912         # "save as" filename, even when no $file_name is given
6913         my $save_as = "$hash";
6914         if (defined $file_name) {
6915                 $save_as = $file_name;
6916         } elsif ($type =~ m/^text\//) {
6917                 $save_as .= '.txt';
6918         }
6919
6920         # With XSS prevention on, blobs of all types except a few known safe
6921         # ones are served with "Content-Disposition: attachment" to make sure
6922         # they don't run in our security domain.  For certain image types,
6923         # blob view writes an <img> tag referring to blob_plain view, and we
6924         # want to be sure not to break that by serving the image as an
6925         # attachment (though Firefox 3 doesn't seem to care).
6926         my $sandbox = $prevent_xss &&
6927                 $type !~ m!^(?:text/[a-z]+|image/(?:gif|png|jpeg))(?:[ ;]|$)!;
6928
6929         # serve text/* as text/plain
6930         if ($prevent_xss &&
6931             ($type =~ m!^text/[a-z]+\b(.*)$! ||
6932              ($type =~ m!^[a-z]+/[a-z]\+xml\b(.*)$! && -T $fd))) {
6933                 my $rest = $1;
6934                 $rest = defined $rest ? $rest : '';
6935                 $type = "text/plain$rest";
6936         }
6937
6938         print $cgi->header(
6939                 -type => $type,
6940                 -expires => $expires,
6941                 -content_disposition =>
6942                         ($sandbox ? 'attachment' : 'inline')
6943                         . '; filename="' . $save_as . '"');
6944         local $/ = undef;
6945         binmode STDOUT, ':raw';
6946         print <$fd>;
6947         binmode STDOUT, ':utf8'; # as set at the beginning of gitweb.cgi
6948         close $fd;
6949 }
6950
6951 sub git_blob {
6952         my $expires;
6953
6954         if (!defined $hash) {
6955                 if (defined $file_name) {
6956                         my $base = $hash_base || git_get_head_hash($project);
6957                         $hash = git_get_hash_by_path($base, $file_name, "blob")
6958                                 or die_error(404, "Cannot find file");
6959                 } else {
6960                         die_error(400, "No file name defined");
6961                 }
6962         } elsif ($hash =~ m/^[0-9a-fA-F]{40}$/) {
6963                 # blobs defined by non-textual hash id's can be cached
6964                 $expires = "+1d";
6965         }
6966
6967         my $have_blame = gitweb_check_feature('blame');
6968         open my $fd, "-|", git_cmd(), "cat-file", "blob", $hash
6969                 or die_error(500, "Couldn't cat $file_name, $hash");
6970         my $mimetype = blob_mimetype($fd, $file_name);
6971         # use 'blob_plain' (aka 'raw') view for files that cannot be displayed
6972         if ($mimetype !~ m!^(?:text/|image/(?:gif|png|jpeg)$)! && -B $fd) {
6973                 close $fd;
6974                 return git_blob_plain($mimetype);
6975         }
6976         # we can have blame only for text/* mimetype
6977         $have_blame &&= ($mimetype =~ m!^text/!);
6978
6979         my $highlight = gitweb_check_feature('highlight');
6980         my $syntax = guess_file_syntax($highlight, $mimetype, $file_name);
6981         $fd = run_highlighter($fd, $highlight, $syntax)
6982                 if $syntax;
6983
6984         git_header_html(undef, $expires);
6985         my $formats_nav = '';
6986         if (defined $hash_base && (my %co = parse_commit($hash_base))) {
6987                 if (defined $file_name) {
6988                         if ($have_blame) {
6989                                 $formats_nav .=
6990                                         $cgi->a({-href => href(action=>"blame", -replay=>1)},
6991                                                 "blame") .
6992                                         " | ";
6993                         }
6994                         $formats_nav .=
6995                                 $cgi->a({-href => href(action=>"history", -replay=>1)},
6996                                         "history") .
6997                                 " | " .
6998                                 $cgi->a({-href => href(action=>"blob_plain", -replay=>1)},
6999                                         "raw") .
7000                                 " | " .
7001                                 $cgi->a({-href => href(action=>"blob",
7002                                                        hash_base=>"HEAD", file_name=>$file_name)},
7003                                         "HEAD");
7004                 } else {
7005                         $formats_nav .=
7006                                 $cgi->a({-href => href(action=>"blob_plain", -replay=>1)},
7007                                         "raw");
7008                 }
7009                 git_print_page_nav('','', $hash_base,$co{'tree'},$hash_base, $formats_nav);
7010                 git_print_header_div('commit', esc_html($co{'title'}), $hash_base);
7011         } else {
7012                 print "<div class=\"page_nav\">\n" .
7013                       "<br/><br/></div>\n" .
7014                       "<div class=\"title\">".esc_html($hash)."</div>\n";
7015         }
7016         git_print_page_path($file_name, "blob", $hash_base);
7017         print "<div class=\"page_body\">\n";
7018         if ($mimetype =~ m!^image/!) {
7019                 print qq!<img type="!.esc_attr($mimetype).qq!"!;
7020                 if ($file_name) {
7021                         print qq! alt="!.esc_attr($file_name).qq!" title="!.esc_attr($file_name).qq!"!;
7022                 }
7023                 print qq! src="! .
7024                       href(action=>"blob_plain", hash=>$hash,
7025                            hash_base=>$hash_base, file_name=>$file_name) .
7026                       qq!" />\n!;
7027         } else {
7028                 my $nr;
7029                 while (my $line = <$fd>) {
7030                         chomp $line;
7031                         $nr++;
7032                         $line = untabify($line);
7033                         printf qq!<div class="pre"><a id="l%i" href="%s#l%i" class="linenr">%4i</a> %s</div>\n!,
7034                                $nr, esc_attr(href(-replay => 1)), $nr, $nr,
7035                                $syntax ? sanitize($line) : esc_html($line, -nbsp=>1);
7036                 }
7037         }
7038         close $fd
7039                 or print "Reading blob failed.\n";
7040         print "</div>";
7041         git_footer_html();
7042 }
7043
7044 sub git_tree {
7045         if (!defined $hash_base) {
7046                 $hash_base = "HEAD";
7047         }
7048         if (!defined $hash) {
7049                 if (defined $file_name) {
7050                         $hash = git_get_hash_by_path($hash_base, $file_name, "tree");
7051                 } else {
7052                         $hash = $hash_base;
7053                 }
7054         }
7055         die_error(404, "No such tree") unless defined($hash);
7056
7057         my $show_sizes = gitweb_check_feature('show-sizes');
7058         my $have_blame = gitweb_check_feature('blame');
7059
7060         my @entries = ();
7061         {
7062                 local $/ = "\0";
7063                 open my $fd, "-|", git_cmd(), "ls-tree", '-z',
7064                         ($show_sizes ? '-l' : ()), @extra_options, $hash
7065                         or die_error(500, "Open git-ls-tree failed");
7066                 @entries = map { chomp; $_ } <$fd>;
7067                 close $fd
7068                         or die_error(404, "Reading tree failed");
7069         }
7070
7071         my $refs = git_get_references();
7072         my $ref = format_ref_marker($refs, $hash_base);
7073         git_header_html();
7074         my $basedir = '';
7075         if (defined $hash_base && (my %co = parse_commit($hash_base))) {
7076                 my @views_nav = ();
7077                 if (defined $file_name) {
7078                         push @views_nav,
7079                                 $cgi->a({-href => href(action=>"history", -replay=>1)},
7080                                         "history"),
7081                                 $cgi->a({-href => href(action=>"tree",
7082                                                        hash_base=>"HEAD", file_name=>$file_name)},
7083                                         "HEAD"),
7084                 }
7085                 my $snapshot_links = format_snapshot_links($hash);
7086                 if (defined $snapshot_links) {
7087                         # FIXME: Should be available when we have no hash base as well.
7088                         push @views_nav, $snapshot_links;
7089                 }
7090                 git_print_page_nav('tree','', $hash_base, undef, undef,
7091                                    join(' | ', @views_nav));
7092                 git_print_header_div('commit', esc_html($co{'title'}) . $ref, $hash_base);
7093         } else {
7094                 undef $hash_base;
7095                 print "<div class=\"page_nav\">\n";
7096                 print "<br/><br/></div>\n";
7097                 print "<div class=\"title\">".esc_html($hash)."</div>\n";
7098         }
7099         if (defined $file_name) {
7100                 $basedir = $file_name;
7101                 if ($basedir ne '' && substr($basedir, -1) ne '/') {
7102                         $basedir .= '/';
7103                 }
7104                 git_print_page_path($file_name, 'tree', $hash_base);
7105         }
7106         print "<div class=\"page_body\">\n";
7107         print "<table class=\"tree\">\n";
7108         my $alternate = 1;
7109         # '..' (top directory) link if possible
7110         if (defined $hash_base &&
7111             defined $file_name && $file_name =~ m![^/]+$!) {
7112                 if ($alternate) {
7113                         print "<tr class=\"dark\">\n";
7114                 } else {
7115                         print "<tr class=\"light\">\n";
7116                 }
7117                 $alternate ^= 1;
7118
7119                 my $up = $file_name;
7120                 $up =~ s!/?[^/]+$!!;
7121                 undef $up unless $up;
7122                 # based on git_print_tree_entry
7123                 print '<td class="mode">' . mode_str('040000') . "</td>\n";
7124                 print '<td class="size">&nbsp;</td>'."\n" if $show_sizes;
7125                 print '<td class="list">';
7126                 print $cgi->a({-href => href(action=>"tree",
7127                                              hash_base=>$hash_base,
7128                                              file_name=>$up)},
7129                               "..");
7130                 print "</td>\n";
7131                 print "<td class=\"link\"></td>\n";
7132
7133                 print "</tr>\n";
7134         }
7135         foreach my $line (@entries) {
7136                 my %t = parse_ls_tree_line($line, -z => 1, -l => $show_sizes);
7137
7138                 if ($alternate) {
7139                         print "<tr class=\"dark\">\n";
7140                 } else {
7141                         print "<tr class=\"light\">\n";
7142                 }
7143                 $alternate ^= 1;
7144
7145                 git_print_tree_entry(\%t, $basedir, $hash_base, $have_blame);
7146
7147                 print "</tr>\n";
7148         }
7149         print "</table>\n" .
7150               "</div>";
7151         git_footer_html();
7152 }
7153
7154 sub snapshot_name {
7155         my ($project, $hash) = @_;
7156
7157         # path/to/project.git  -> project
7158         # path/to/project/.git -> project
7159         my $name = to_utf8($project);
7160         $name =~ s,([^/])/*\.git$,$1,;
7161         $name = basename($name);
7162         # sanitize name
7163         $name =~ s/[[:cntrl:]]/?/g;
7164
7165         my $ver = $hash;
7166         if ($hash =~ /^[0-9a-fA-F]+$/) {
7167                 # shorten SHA-1 hash
7168                 my $full_hash = git_get_full_hash($project, $hash);
7169                 if ($full_hash =~ /^$hash/ && length($hash) > 7) {
7170                         $ver = git_get_short_hash($project, $hash);
7171                 }
7172         } elsif ($hash =~ m!^refs/tags/(.*)$!) {
7173                 # tags don't need shortened SHA-1 hash
7174                 $ver = $1;
7175         } else {
7176                 # branches and other need shortened SHA-1 hash
7177                 if ($hash =~ m!^refs/(?:heads|remotes)/(.*)$!) {
7178                         $ver = $1;
7179                 }
7180                 $ver .= '-' . git_get_short_hash($project, $hash);
7181         }
7182         # in case of hierarchical branch names
7183         $ver =~ s!/!.!g;
7184
7185         # name = project-version_string
7186         $name = "$name-$ver";
7187
7188         return wantarray ? ($name, $name) : $name;
7189 }
7190
7191 sub exit_if_unmodified_since {
7192         my ($latest_epoch) = @_;
7193         our $cgi;
7194
7195         my $if_modified = $cgi->http('IF_MODIFIED_SINCE');
7196         if (defined $if_modified) {
7197                 my $since;
7198                 if (eval { require HTTP::Date; 1; }) {
7199                         $since = HTTP::Date::str2time($if_modified);
7200                 } elsif (eval { require Time::ParseDate; 1; }) {
7201                         $since = Time::ParseDate::parsedate($if_modified, GMT => 1);
7202                 }
7203                 if (defined $since && $latest_epoch <= $since) {
7204                         my %latest_date = parse_date($latest_epoch);
7205                         print $cgi->header(
7206                                 -last_modified => $latest_date{'rfc2822'},
7207                                 -status => '304 Not Modified');
7208                         goto DONE_GITWEB;
7209                 }
7210         }
7211 }
7212
7213 sub git_snapshot {
7214         my $format = $input_params{'snapshot_format'};
7215         if (!@snapshot_fmts) {
7216                 die_error(403, "Snapshots not allowed");
7217         }
7218         # default to first supported snapshot format
7219         $format ||= $snapshot_fmts[0];
7220         if ($format !~ m/^[a-z0-9]+$/) {
7221                 die_error(400, "Invalid snapshot format parameter");
7222         } elsif (!exists($known_snapshot_formats{$format})) {
7223                 die_error(400, "Unknown snapshot format");
7224         } elsif ($known_snapshot_formats{$format}{'disabled'}) {
7225                 die_error(403, "Snapshot format not allowed");
7226         } elsif (!grep($_ eq $format, @snapshot_fmts)) {
7227                 die_error(403, "Unsupported snapshot format");
7228         }
7229
7230         my $type = git_get_type("$hash^{}");
7231         if (!$type) {
7232                 die_error(404, 'Object does not exist');
7233         }  elsif ($type eq 'blob') {
7234                 die_error(400, 'Object is not a tree-ish');
7235         }
7236
7237         my ($name, $prefix) = snapshot_name($project, $hash);
7238         my $filename = "$name$known_snapshot_formats{$format}{'suffix'}";
7239
7240         my %co = parse_commit($hash);
7241         exit_if_unmodified_since($co{'committer_epoch'}) if %co;
7242
7243         my $cmd = quote_command(
7244                 git_cmd(), 'archive',
7245                 "--format=$known_snapshot_formats{$format}{'format'}",
7246                 "--prefix=$prefix/", $hash);
7247         if (exists $known_snapshot_formats{$format}{'compressor'}) {
7248                 $cmd .= ' | ' . quote_command(@{$known_snapshot_formats{$format}{'compressor'}});
7249         }
7250
7251         $filename =~ s/(["\\])/\\$1/g;
7252         my %latest_date;
7253         if (%co) {
7254                 %latest_date = parse_date($co{'committer_epoch'}, $co{'committer_tz'});
7255         }
7256
7257         print $cgi->header(
7258                 -type => $known_snapshot_formats{$format}{'type'},
7259                 -content_disposition => 'inline; filename="' . $filename . '"',
7260                 %co ? (-last_modified => $latest_date{'rfc2822'}) : (),
7261                 -status => '200 OK');
7262
7263         open my $fd, "-|", $cmd
7264                 or die_error(500, "Execute git-archive failed");
7265         binmode STDOUT, ':raw';
7266         print <$fd>;
7267         binmode STDOUT, ':utf8'; # as set at the beginning of gitweb.cgi
7268         close $fd;
7269 }
7270
7271 sub git_log_generic {
7272         my ($fmt_name, $body_subr, $base, $parent, $file_name, $file_hash) = @_;
7273
7274         my $head = git_get_head_hash($project);
7275         if (!defined $base) {
7276                 $base = $head;
7277         }
7278         if (!defined $page) {
7279                 $page = 0;
7280         }
7281         my $refs = git_get_references();
7282
7283         my $commit_hash = $base;
7284         if (defined $parent) {
7285                 $commit_hash = "$parent..$base";
7286         }
7287         my @commitlist =
7288                 parse_commits($commit_hash, 101, (100 * $page),
7289                               defined $file_name ? ($file_name, "--full-history") : ());
7290
7291         my $ftype;
7292         if (!defined $file_hash && defined $file_name) {
7293                 # some commits could have deleted file in question,
7294                 # and not have it in tree, but one of them has to have it
7295                 for (my $i = 0; $i < @commitlist; $i++) {
7296                         $file_hash = git_get_hash_by_path($commitlist[$i]{'id'}, $file_name);
7297                         last if defined $file_hash;
7298                 }
7299         }
7300         if (defined $file_hash) {
7301                 $ftype = git_get_type($file_hash);
7302         }
7303         if (defined $file_name && !defined $ftype) {
7304                 die_error(500, "Unknown type of object");
7305         }
7306         my %co;
7307         if (defined $file_name) {
7308                 %co = parse_commit($base)
7309                         or die_error(404, "Unknown commit object");
7310         }
7311
7312
7313         my $paging_nav = format_paging_nav($fmt_name, $page, $#commitlist >= 100);
7314         my $next_link = '';
7315         if ($#commitlist >= 100) {
7316                 $next_link =
7317                         $cgi->a({-href => href(-replay=>1, page=>$page+1),
7318                                  -accesskey => "n", -title => "Alt-n"}, "next");
7319         }
7320         my $patch_max = gitweb_get_feature('patches');
7321         if ($patch_max && !defined $file_name) {
7322                 if ($patch_max < 0 || @commitlist <= $patch_max) {
7323                         $paging_nav .= " &sdot; " .
7324                                 $cgi->a({-href => href(action=>"patches", -replay=>1)},
7325                                         "patches");
7326                 }
7327         }
7328
7329         git_header_html();
7330         git_print_page_nav($fmt_name,'', $hash,$hash,$hash, $paging_nav);
7331         if (defined $file_name) {
7332                 git_print_header_div('commit', esc_html($co{'title'}), $base);
7333         } else {
7334                 git_print_header_div('summary', $project)
7335         }
7336         git_print_page_path($file_name, $ftype, $hash_base)
7337                 if (defined $file_name);
7338
7339         $body_subr->(\@commitlist, 0, 99, $refs, $next_link,
7340                      $file_name, $file_hash, $ftype);
7341
7342         git_footer_html();
7343 }
7344
7345 sub git_log {
7346         git_log_generic('log', \&git_log_body,
7347                         $hash, $hash_parent);
7348 }
7349
7350 sub git_commit {
7351         $hash ||= $hash_base || "HEAD";
7352         my %co = parse_commit($hash)
7353             or die_error(404, "Unknown commit object");
7354
7355         my $parent  = $co{'parent'};
7356         my $parents = $co{'parents'}; # listref
7357
7358         # we need to prepare $formats_nav before any parameter munging
7359         my $formats_nav;
7360         if (!defined $parent) {
7361                 # --root commitdiff
7362                 $formats_nav .= '(initial)';
7363         } elsif (@$parents == 1) {
7364                 # single parent commit
7365                 $formats_nav .=
7366                         '(parent: ' .
7367                         $cgi->a({-href => href(action=>"commit",
7368                                                hash=>$parent)},
7369                                 esc_html(substr($parent, 0, 7))) .
7370                         ')';
7371         } else {
7372                 # merge commit
7373                 $formats_nav .=
7374                         '(merge: ' .
7375                         join(' ', map {
7376                                 $cgi->a({-href => href(action=>"commit",
7377                                                        hash=>$_)},
7378                                         esc_html(substr($_, 0, 7)));
7379                         } @$parents ) .
7380                         ')';
7381         }
7382         if (gitweb_check_feature('patches') && @$parents <= 1) {
7383                 $formats_nav .= " | " .
7384                         $cgi->a({-href => href(action=>"patch", -replay=>1)},
7385                                 "patch");
7386         }
7387
7388         if (!defined $parent) {
7389                 $parent = "--root";
7390         }
7391         my @difftree;
7392         open my $fd, "-|", git_cmd(), "diff-tree", '-r', "--no-commit-id",
7393                 @diff_opts,
7394                 (@$parents <= 1 ? $parent : '-c'),
7395                 $hash, "--"
7396                 or die_error(500, "Open git-diff-tree failed");
7397         @difftree = map { chomp; $_ } <$fd>;
7398         close $fd or die_error(404, "Reading git-diff-tree failed");
7399
7400         # non-textual hash id's can be cached
7401         my $expires;
7402         if ($hash =~ m/^[0-9a-fA-F]{40}$/) {
7403                 $expires = "+1d";
7404         }
7405         my $refs = git_get_references();
7406         my $ref = format_ref_marker($refs, $co{'id'});
7407
7408         git_header_html(undef, $expires);
7409         git_print_page_nav('commit', '',
7410                            $hash, $co{'tree'}, $hash,
7411                            $formats_nav);
7412
7413         if (defined $co{'parent'}) {
7414                 git_print_header_div('commitdiff', esc_html($co{'title'}) . $ref, $hash);
7415         } else {
7416                 git_print_header_div('tree', esc_html($co{'title'}) . $ref, $co{'tree'}, $hash);
7417         }
7418         print "<div class=\"title_text\">\n" .
7419               "<table class=\"object_header\">\n";
7420         git_print_authorship_rows(\%co);
7421         print "<tr><td>commit</td><td class=\"sha1\">$co{'id'}</td></tr>\n";
7422         print "<tr>" .
7423               "<td>tree</td>" .
7424               "<td class=\"sha1\">" .
7425               $cgi->a({-href => href(action=>"tree", hash=>$co{'tree'}, hash_base=>$hash),
7426                        class => "list"}, $co{'tree'}) .
7427               "</td>" .
7428               "<td class=\"link\">" .
7429               $cgi->a({-href => href(action=>"tree", hash=>$co{'tree'}, hash_base=>$hash)},
7430                       "tree");
7431         my $snapshot_links = format_snapshot_links($hash);
7432         if (defined $snapshot_links) {
7433                 print " | " . $snapshot_links;
7434         }
7435         print "</td>" .
7436               "</tr>\n";
7437
7438         foreach my $par (@$parents) {
7439                 print "<tr>" .
7440                       "<td>parent</td>" .
7441                       "<td class=\"sha1\">" .
7442                       $cgi->a({-href => href(action=>"commit", hash=>$par),
7443                                class => "list"}, $par) .
7444                       "</td>" .
7445                       "<td class=\"link\">" .
7446                       $cgi->a({-href => href(action=>"commit", hash=>$par)}, "commit") .
7447                       " | " .
7448                       $cgi->a({-href => href(action=>"commitdiff", hash=>$hash, hash_parent=>$par)}, "diff") .
7449                       "</td>" .
7450                       "</tr>\n";
7451         }
7452         print "</table>".
7453               "</div>\n";
7454
7455         print "<div class=\"page_body\">\n";
7456         git_print_log($co{'comment'});
7457         print "</div>\n";
7458
7459         git_difftree_body(\@difftree, $hash, @$parents);
7460
7461         git_footer_html();
7462 }
7463
7464 sub git_object {
7465         # object is defined by:
7466         # - hash or hash_base alone
7467         # - hash_base and file_name
7468         my $type;
7469
7470         # - hash or hash_base alone
7471         if ($hash || ($hash_base && !defined $file_name)) {
7472                 my $object_id = $hash || $hash_base;
7473
7474                 open my $fd, "-|", quote_command(
7475                         git_cmd(), 'cat-file', '-t', $object_id) . ' 2> /dev/null'
7476                         or die_error(404, "Object does not exist");
7477                 $type = <$fd>;
7478                 chomp $type;
7479                 close $fd
7480                         or die_error(404, "Object does not exist");
7481
7482         # - hash_base and file_name
7483         } elsif ($hash_base && defined $file_name) {
7484                 $file_name =~ s,/+$,,;
7485
7486                 system(git_cmd(), "cat-file", '-e', $hash_base) == 0
7487                         or die_error(404, "Base object does not exist");
7488
7489                 # here errors should not happen
7490                 open my $fd, "-|", git_cmd(), "ls-tree", $hash_base, "--", $file_name
7491                         or die_error(500, "Open git-ls-tree failed");
7492                 my $line = <$fd>;
7493                 close $fd;
7494
7495                 #'100644 blob 0fa3f3a66fb6a137f6ec2c19351ed4d807070ffa  panic.c'
7496                 unless ($line && $line =~ m/^([0-9]+) (.+) ([0-9a-fA-F]{40})\t/) {
7497                         die_error(404, "File or directory for given base does not exist");
7498                 }
7499                 $type = $2;
7500                 $hash = $3;
7501         } else {
7502                 die_error(400, "Not enough information to find object");
7503         }
7504
7505         print $cgi->redirect(-uri => href(action=>$type, -full=>1,
7506                                           hash=>$hash, hash_base=>$hash_base,
7507                                           file_name=>$file_name),
7508                              -status => '302 Found');
7509 }
7510
7511 sub git_blobdiff {
7512         my $format = shift || 'html';
7513         my $diff_style = $input_params{'diff_style'} || 'inline';
7514
7515         my $fd;
7516         my @difftree;
7517         my %diffinfo;
7518         my $expires;
7519
7520         # preparing $fd and %diffinfo for git_patchset_body
7521         # new style URI
7522         if (defined $hash_base && defined $hash_parent_base) {
7523                 if (defined $file_name) {
7524                         # read raw output
7525                         open $fd, "-|", git_cmd(), "diff-tree", '-r', @diff_opts,
7526                                 $hash_parent_base, $hash_base,
7527                                 "--", (defined $file_parent ? $file_parent : ()), $file_name
7528                                 or die_error(500, "Open git-diff-tree failed");
7529                         @difftree = map { chomp; $_ } <$fd>;
7530                         close $fd
7531                                 or die_error(404, "Reading git-diff-tree failed");
7532                         @difftree
7533                                 or die_error(404, "Blob diff not found");
7534
7535                 } elsif (defined $hash &&
7536                          $hash =~ /[0-9a-fA-F]{40}/) {
7537                         # try to find filename from $hash
7538
7539                         # read filtered raw output
7540                         open $fd, "-|", git_cmd(), "diff-tree", '-r', @diff_opts,
7541                                 $hash_parent_base, $hash_base, "--"
7542                                 or die_error(500, "Open git-diff-tree failed");
7543                         @difftree =
7544                                 # ':100644 100644 03b21826... 3b93d5e7... M     ls-files.c'
7545                                 # $hash == to_id
7546                                 grep { /^:[0-7]{6} [0-7]{6} [0-9a-fA-F]{40} $hash/ }
7547                                 map { chomp; $_ } <$fd>;
7548                         close $fd
7549                                 or die_error(404, "Reading git-diff-tree failed");
7550                         @difftree
7551                                 or die_error(404, "Blob diff not found");
7552
7553                 } else {
7554                         die_error(400, "Missing one of the blob diff parameters");
7555                 }
7556
7557                 if (@difftree > 1) {
7558                         die_error(400, "Ambiguous blob diff specification");
7559                 }
7560
7561                 %diffinfo = parse_difftree_raw_line($difftree[0]);
7562                 $file_parent ||= $diffinfo{'from_file'} || $file_name;
7563                 $file_name   ||= $diffinfo{'to_file'};
7564
7565                 $hash_parent ||= $diffinfo{'from_id'};
7566                 $hash        ||= $diffinfo{'to_id'};
7567
7568                 # non-textual hash id's can be cached
7569                 if ($hash_base =~ m/^[0-9a-fA-F]{40}$/ &&
7570                     $hash_parent_base =~ m/^[0-9a-fA-F]{40}$/) {
7571                         $expires = '+1d';
7572                 }
7573
7574                 # open patch output
7575                 open $fd, "-|", git_cmd(), "diff-tree", '-r', @diff_opts,
7576                         '-p', ($format eq 'html' ? "--full-index" : ()),
7577                         $hash_parent_base, $hash_base,
7578                         "--", (defined $file_parent ? $file_parent : ()), $file_name
7579                         or die_error(500, "Open git-diff-tree failed");
7580         }
7581
7582         # old/legacy style URI -- not generated anymore since 1.4.3.
7583         if (!%diffinfo) {
7584                 die_error('404 Not Found', "Missing one of the blob diff parameters")
7585         }
7586
7587         # header
7588         if ($format eq 'html') {
7589                 my $formats_nav =
7590                         $cgi->a({-href => href(action=>"blobdiff_plain", -replay=>1)},
7591                                 "raw");
7592                 $formats_nav .= diff_style_nav($diff_style);
7593                 git_header_html(undef, $expires);
7594                 if (defined $hash_base && (my %co = parse_commit($hash_base))) {
7595                         git_print_page_nav('','', $hash_base,$co{'tree'},$hash_base, $formats_nav);
7596                         git_print_header_div('commit', esc_html($co{'title'}), $hash_base);
7597                 } else {
7598                         print "<div class=\"page_nav\"><br/>$formats_nav<br/></div>\n";
7599                         print "<div class=\"title\">".esc_html("$hash vs $hash_parent")."</div>\n";
7600                 }
7601                 if (defined $file_name) {
7602                         git_print_page_path($file_name, "blob", $hash_base);
7603                 } else {
7604                         print "<div class=\"page_path\"></div>\n";
7605                 }
7606
7607         } elsif ($format eq 'plain') {
7608                 print $cgi->header(
7609                         -type => 'text/plain',
7610                         -charset => 'utf-8',
7611                         -expires => $expires,
7612                         -content_disposition => 'inline; filename="' . "$file_name" . '.patch"');
7613
7614                 print "X-Git-Url: " . $cgi->self_url() . "\n\n";
7615
7616         } else {
7617                 die_error(400, "Unknown blobdiff format");
7618         }
7619
7620         # patch
7621         if ($format eq 'html') {
7622                 print "<div class=\"page_body\">\n";
7623
7624                 git_patchset_body($fd, $diff_style,
7625                                   [ \%diffinfo ], $hash_base, $hash_parent_base);
7626                 close $fd;
7627
7628                 print "</div>\n"; # class="page_body"
7629                 git_footer_html();
7630
7631         } else {
7632                 while (my $line = <$fd>) {
7633                         $line =~ s!a/($hash|$hash_parent)!'a/'.esc_path($diffinfo{'from_file'})!eg;
7634                         $line =~ s!b/($hash|$hash_parent)!'b/'.esc_path($diffinfo{'to_file'})!eg;
7635
7636                         print $line;
7637
7638                         last if $line =~ m!^\+\+\+!;
7639                 }
7640                 local $/ = undef;
7641                 print <$fd>;
7642                 close $fd;
7643         }
7644 }
7645
7646 sub git_blobdiff_plain {
7647         git_blobdiff('plain');
7648 }
7649
7650 # assumes that it is added as later part of already existing navigation,
7651 # so it returns "| foo | bar" rather than just "foo | bar"
7652 sub diff_style_nav {
7653         my ($diff_style, $is_combined) = @_;
7654         $diff_style ||= 'inline';
7655
7656         return "" if ($is_combined);
7657
7658         my @styles = (inline => 'inline', 'sidebyside' => 'side by side');
7659         my %styles = @styles;
7660         @styles =
7661                 @styles[ map { $_ * 2 } 0..$#styles/2 ];
7662
7663         return join '',
7664                 map { " | ".$_ }
7665                 map {
7666                         $_ eq $diff_style ? $styles{$_} :
7667                         $cgi->a({-href => href(-replay=>1, diff_style => $_)}, $styles{$_})
7668                 } @styles;
7669 }
7670
7671 sub git_commitdiff {
7672         my %params = @_;
7673         my $format = $params{-format} || 'html';
7674         my $diff_style = $input_params{'diff_style'} || 'inline';
7675
7676         my ($patch_max) = gitweb_get_feature('patches');
7677         if ($format eq 'patch') {
7678                 die_error(403, "Patch view not allowed") unless $patch_max;
7679         }
7680
7681         $hash ||= $hash_base || "HEAD";
7682         my %co = parse_commit($hash)
7683             or die_error(404, "Unknown commit object");
7684
7685         # choose format for commitdiff for merge
7686         if (! defined $hash_parent && @{$co{'parents'}} > 1) {
7687                 $hash_parent = '--cc';
7688         }
7689         # we need to prepare $formats_nav before almost any parameter munging
7690         my $formats_nav;
7691         if ($format eq 'html') {
7692                 $formats_nav =
7693                         $cgi->a({-href => href(action=>"commitdiff_plain", -replay=>1)},
7694                                 "raw");
7695                 if ($patch_max && @{$co{'parents'}} <= 1) {
7696                         $formats_nav .= " | " .
7697                                 $cgi->a({-href => href(action=>"patch", -replay=>1)},
7698                                         "patch");
7699                 }
7700                 $formats_nav .= diff_style_nav($diff_style, @{$co{'parents'}} > 1);
7701
7702                 if (defined $hash_parent &&
7703                     $hash_parent ne '-c' && $hash_parent ne '--cc') {
7704                         # commitdiff with two commits given
7705                         my $hash_parent_short = $hash_parent;
7706                         if ($hash_parent =~ m/^[0-9a-fA-F]{40}$/) {
7707                                 $hash_parent_short = substr($hash_parent, 0, 7);
7708                         }
7709                         $formats_nav .=
7710                                 ' (from';
7711                         for (my $i = 0; $i < @{$co{'parents'}}; $i++) {
7712                                 if ($co{'parents'}[$i] eq $hash_parent) {
7713                                         $formats_nav .= ' parent ' . ($i+1);
7714                                         last;
7715                                 }
7716                         }
7717                         $formats_nav .= ': ' .
7718                                 $cgi->a({-href => href(-replay=>1,
7719                                                        hash=>$hash_parent, hash_base=>undef)},
7720                                         esc_html($hash_parent_short)) .
7721                                 ')';
7722                 } elsif (!$co{'parent'}) {
7723                         # --root commitdiff
7724                         $formats_nav .= ' (initial)';
7725                 } elsif (scalar @{$co{'parents'}} == 1) {
7726                         # single parent commit
7727                         $formats_nav .=
7728                                 ' (parent: ' .
7729                                 $cgi->a({-href => href(-replay=>1,
7730                                                        hash=>$co{'parent'}, hash_base=>undef)},
7731                                         esc_html(substr($co{'parent'}, 0, 7))) .
7732                                 ')';
7733                 } else {
7734                         # merge commit
7735                         if ($hash_parent eq '--cc') {
7736                                 $formats_nav .= ' | ' .
7737                                         $cgi->a({-href => href(-replay=>1,
7738                                                                hash=>$hash, hash_parent=>'-c')},
7739                                                 'combined');
7740                         } else { # $hash_parent eq '-c'
7741                                 $formats_nav .= ' | ' .
7742                                         $cgi->a({-href => href(-replay=>1,
7743                                                                hash=>$hash, hash_parent=>'--cc')},
7744                                                 'compact');
7745                         }
7746                         $formats_nav .=
7747                                 ' (merge: ' .
7748                                 join(' ', map {
7749                                         $cgi->a({-href => href(-replay=>1,
7750                                                                hash=>$_, hash_base=>undef)},
7751                                                 esc_html(substr($_, 0, 7)));
7752                                 } @{$co{'parents'}} ) .
7753                                 ')';
7754                 }
7755         }
7756
7757         my $hash_parent_param = $hash_parent;
7758         if (!defined $hash_parent_param) {
7759                 # --cc for multiple parents, --root for parentless
7760                 $hash_parent_param =
7761                         @{$co{'parents'}} > 1 ? '--cc' : $co{'parent'} || '--root';
7762         }
7763
7764         # read commitdiff
7765         my $fd;
7766         my @difftree;
7767         if ($format eq 'html') {
7768                 open $fd, "-|", git_cmd(), "diff-tree", '-r', @diff_opts,
7769                         "--no-commit-id", "--patch-with-raw", "--full-index",
7770                         $hash_parent_param, $hash, "--"
7771                         or die_error(500, "Open git-diff-tree failed");
7772
7773                 while (my $line = <$fd>) {
7774                         chomp $line;
7775                         # empty line ends raw part of diff-tree output
7776                         last unless $line;
7777                         push @difftree, scalar parse_difftree_raw_line($line);
7778                 }
7779
7780         } elsif ($format eq 'plain') {
7781                 open $fd, "-|", git_cmd(), "diff-tree", '-r', @diff_opts,
7782                         '-p', $hash_parent_param, $hash, "--"
7783                         or die_error(500, "Open git-diff-tree failed");
7784         } elsif ($format eq 'patch') {
7785                 # For commit ranges, we limit the output to the number of
7786                 # patches specified in the 'patches' feature.
7787                 # For single commits, we limit the output to a single patch,
7788                 # diverging from the git-format-patch default.
7789                 my @commit_spec = ();
7790                 if ($hash_parent) {
7791                         if ($patch_max > 0) {
7792                                 push @commit_spec, "-$patch_max";
7793                         }
7794                         push @commit_spec, '-n', "$hash_parent..$hash";
7795                 } else {
7796                         if ($params{-single}) {
7797                                 push @commit_spec, '-1';
7798                         } else {
7799                                 if ($patch_max > 0) {
7800                                         push @commit_spec, "-$patch_max";
7801                                 }
7802                                 push @commit_spec, "-n";
7803                         }
7804                         push @commit_spec, '--root', $hash;
7805                 }
7806                 open $fd, "-|", git_cmd(), "format-patch", @diff_opts,
7807                         '--encoding=utf8', '--stdout', @commit_spec
7808                         or die_error(500, "Open git-format-patch failed");
7809         } else {
7810                 die_error(400, "Unknown commitdiff format");
7811         }
7812
7813         # non-textual hash id's can be cached
7814         my $expires;
7815         if ($hash =~ m/^[0-9a-fA-F]{40}$/) {
7816                 $expires = "+1d";
7817         }
7818
7819         # write commit message
7820         if ($format eq 'html') {
7821                 my $refs = git_get_references();
7822                 my $ref = format_ref_marker($refs, $co{'id'});
7823
7824                 git_header_html(undef, $expires);
7825                 git_print_page_nav('commitdiff','', $hash,$co{'tree'},$hash, $formats_nav);
7826                 git_print_header_div('commit', esc_html($co{'title'}) . $ref, $hash);
7827                 print "<div class=\"title_text\">\n" .
7828                       "<table class=\"object_header\">\n";
7829                 git_print_authorship_rows(\%co);
7830                 print "</table>".
7831                       "</div>\n";
7832                 print "<div class=\"page_body\">\n";
7833                 if (@{$co{'comment'}} > 1) {
7834                         print "<div class=\"log\">\n";
7835                         git_print_log($co{'comment'}, -final_empty_line=> 1, -remove_title => 1);
7836                         print "</div>\n"; # class="log"
7837                 }
7838
7839         } elsif ($format eq 'plain') {
7840                 my $refs = git_get_references("tags");
7841                 my $tagname = git_get_rev_name_tags($hash);
7842                 my $filename = basename($project) . "-$hash.patch";
7843
7844                 print $cgi->header(
7845                         -type => 'text/plain',
7846                         -charset => 'utf-8',
7847                         -expires => $expires,
7848                         -content_disposition => 'inline; filename="' . "$filename" . '"');
7849                 my %ad = parse_date($co{'author_epoch'}, $co{'author_tz'});
7850                 print "From: " . to_utf8($co{'author'}) . "\n";
7851                 print "Date: $ad{'rfc2822'} ($ad{'tz_local'})\n";
7852                 print "Subject: " . to_utf8($co{'title'}) . "\n";
7853
7854                 print "X-Git-Tag: $tagname\n" if $tagname;
7855                 print "X-Git-Url: " . $cgi->self_url() . "\n\n";
7856
7857                 foreach my $line (@{$co{'comment'}}) {
7858                         print to_utf8($line) . "\n";
7859                 }
7860                 print "---\n\n";
7861         } elsif ($format eq 'patch') {
7862                 my $filename = basename($project) . "-$hash.patch";
7863
7864                 print $cgi->header(
7865                         -type => 'text/plain',
7866                         -charset => 'utf-8',
7867                         -expires => $expires,
7868                         -content_disposition => 'inline; filename="' . "$filename" . '"');
7869         }
7870
7871         # write patch
7872         if ($format eq 'html') {
7873                 my $use_parents = !defined $hash_parent ||
7874                         $hash_parent eq '-c' || $hash_parent eq '--cc';
7875                 git_difftree_body(\@difftree, $hash,
7876                                   $use_parents ? @{$co{'parents'}} : $hash_parent);
7877                 print "<br/>\n";
7878
7879                 git_patchset_body($fd, $diff_style,
7880                                   \@difftree, $hash,
7881                                   $use_parents ? @{$co{'parents'}} : $hash_parent);
7882                 close $fd;
7883                 print "</div>\n"; # class="page_body"
7884                 git_footer_html();
7885
7886         } elsif ($format eq 'plain') {
7887                 local $/ = undef;
7888                 print <$fd>;
7889                 close $fd
7890                         or print "Reading git-diff-tree failed\n";
7891         } elsif ($format eq 'patch') {
7892                 local $/ = undef;
7893                 print <$fd>;
7894                 close $fd
7895                         or print "Reading git-format-patch failed\n";
7896         }
7897 }
7898
7899 sub git_commitdiff_plain {
7900         git_commitdiff(-format => 'plain');
7901 }
7902
7903 # format-patch-style patches
7904 sub git_patch {
7905         git_commitdiff(-format => 'patch', -single => 1);
7906 }
7907
7908 sub git_patches {
7909         git_commitdiff(-format => 'patch');
7910 }
7911
7912 sub git_history {
7913         git_log_generic('history', \&git_history_body,
7914                         $hash_base, $hash_parent_base,
7915                         $file_name, $hash);
7916 }
7917
7918 sub git_search {
7919         $searchtype ||= 'commit';
7920
7921         # check if appropriate features are enabled
7922         gitweb_check_feature('search')
7923                 or die_error(403, "Search is disabled");
7924         if ($searchtype eq 'pickaxe') {
7925                 # pickaxe may take all resources of your box and run for several minutes
7926                 # with every query - so decide by yourself how public you make this feature
7927                 gitweb_check_feature('pickaxe')
7928                         or die_error(403, "Pickaxe search is disabled");
7929         }
7930         if ($searchtype eq 'grep') {
7931                 # grep search might be potentially CPU-intensive, too
7932                 gitweb_check_feature('grep')
7933                         or die_error(403, "Grep search is disabled");
7934         }
7935
7936         if (!defined $searchtext) {
7937                 die_error(400, "Text field is empty");
7938         }
7939         if (!defined $hash) {
7940                 $hash = git_get_head_hash($project);
7941         }
7942         my %co = parse_commit($hash);
7943         if (!%co) {
7944                 die_error(404, "Unknown commit object");
7945         }
7946         if (!defined $page) {
7947                 $page = 0;
7948         }
7949
7950         if ($searchtype eq 'commit' ||
7951             $searchtype eq 'author' ||
7952             $searchtype eq 'committer') {
7953                 git_search_message(%co);
7954         } elsif ($searchtype eq 'pickaxe') {
7955                 git_search_changes(%co);
7956         } elsif ($searchtype eq 'grep') {
7957                 git_search_files(%co);
7958         } else {
7959                 die_error(400, "Unknown search type");
7960         }
7961 }
7962
7963 sub git_search_help {
7964         git_header_html();
7965         git_print_page_nav('','', $hash,$hash,$hash);
7966         print <<EOT;
7967 <p><strong>Pattern</strong> is by default a normal string that is matched precisely (but without
7968 regard to case, except in the case of pickaxe). However, when you check the <em>re</em> checkbox,
7969 the pattern entered is recognized as the POSIX extended
7970 <a href="http://en.wikipedia.org/wiki/Regular_expression">regular expression</a> (also case
7971 insensitive).</p>
7972 <dl>
7973 <dt><b>commit</b></dt>
7974 <dd>The commit messages and authorship information will be scanned for the given pattern.</dd>
7975 EOT
7976         my $have_grep = gitweb_check_feature('grep');
7977         if ($have_grep) {
7978                 print <<EOT;
7979 <dt><b>grep</b></dt>
7980 <dd>All files in the currently selected tree (HEAD unless you are explicitly browsing
7981     a different one) are searched for the given pattern. On large trees, this search can take
7982 a while and put some strain on the server, so please use it with some consideration. Note that
7983 due to git-grep peculiarity, currently if regexp mode is turned off, the matches are
7984 case-sensitive.</dd>
7985 EOT
7986         }
7987         print <<EOT;
7988 <dt><b>author</b></dt>
7989 <dd>Name and e-mail of the change author and date of birth of the patch will be scanned for the given pattern.</dd>
7990 <dt><b>committer</b></dt>
7991 <dd>Name and e-mail of the committer and date of commit will be scanned for the given pattern.</dd>
7992 EOT
7993         my $have_pickaxe = gitweb_check_feature('pickaxe');
7994         if ($have_pickaxe) {
7995                 print <<EOT;
7996 <dt><b>pickaxe</b></dt>
7997 <dd>All commits that caused the string to appear or disappear from any file (changes that
7998 added, removed or "modified" the string) will be listed. This search can take a while and
7999 takes a lot of strain on the server, so please use it wisely. Note that since you may be
8000 interested even in changes just changing the case as well, this search is case sensitive.</dd>
8001 EOT
8002         }
8003         print "</dl>\n";
8004         git_footer_html();
8005 }
8006
8007 sub git_shortlog {
8008         git_log_generic('shortlog', \&git_shortlog_body,
8009                         $hash, $hash_parent);
8010 }
8011
8012 ## ......................................................................
8013 ## feeds (RSS, Atom; OPML)
8014
8015 sub git_feed {
8016         my $format = shift || 'atom';
8017         my $have_blame = gitweb_check_feature('blame');
8018
8019         # Atom: http://www.atomenabled.org/developers/syndication/
8020         # RSS:  http://www.notestips.com/80256B3A007F2692/1/NAMO5P9UPQ
8021         if ($format ne 'rss' && $format ne 'atom') {
8022                 die_error(400, "Unknown web feed format");
8023         }
8024
8025         # log/feed of current (HEAD) branch, log of given branch, history of file/directory
8026         my $head = $hash || 'HEAD';
8027         my @commitlist = parse_commits($head, 150, 0, $file_name);
8028
8029         my %latest_commit;
8030         my %latest_date;
8031         my $content_type = "application/$format+xml";
8032         if (defined $cgi->http('HTTP_ACCEPT') &&
8033                  $cgi->Accept('text/xml') > $cgi->Accept($content_type)) {
8034                 # browser (feed reader) prefers text/xml
8035                 $content_type = 'text/xml';
8036         }
8037         if (defined($commitlist[0])) {
8038                 %latest_commit = %{$commitlist[0]};
8039                 my $latest_epoch = $latest_commit{'committer_epoch'};
8040                 exit_if_unmodified_since($latest_epoch);
8041                 %latest_date = parse_date($latest_epoch, $latest_commit{'committer_tz'});
8042         }
8043         print $cgi->header(
8044                 -type => $content_type,
8045                 -charset => 'utf-8',
8046                 %latest_date ? (-last_modified => $latest_date{'rfc2822'}) : (),
8047                 -status => '200 OK');
8048
8049         # Optimization: skip generating the body if client asks only
8050         # for Last-Modified date.
8051         return if ($cgi->request_method() eq 'HEAD');
8052
8053         # header variables
8054         my $title = "$site_name - $project/$action";
8055         my $feed_type = 'log';
8056         if (defined $hash) {
8057                 $title .= " - '$hash'";
8058                 $feed_type = 'branch log';
8059                 if (defined $file_name) {
8060                         $title .= " :: $file_name";
8061                         $feed_type = 'history';
8062                 }
8063         } elsif (defined $file_name) {
8064                 $title .= " - $file_name";
8065                 $feed_type = 'history';
8066         }
8067         $title .= " $feed_type";
8068         $title = esc_html($title);
8069         my $descr = git_get_project_description($project);
8070         if (defined $descr) {
8071                 $descr = esc_html($descr);
8072         } else {
8073                 $descr = "$project " .
8074                          ($format eq 'rss' ? 'RSS' : 'Atom') .
8075                          " feed";
8076         }
8077         my $owner = git_get_project_owner($project);
8078         $owner = esc_html($owner);
8079
8080         #header
8081         my $alt_url;
8082         if (defined $file_name) {
8083                 $alt_url = href(-full=>1, action=>"history", hash=>$hash, file_name=>$file_name);
8084         } elsif (defined $hash) {
8085                 $alt_url = href(-full=>1, action=>"log", hash=>$hash);
8086         } else {
8087                 $alt_url = href(-full=>1, action=>"summary");
8088         }
8089         print qq!<?xml version="1.0" encoding="utf-8"?>\n!;
8090         if ($format eq 'rss') {
8091                 print <<XML;
8092 <rss version="2.0" xmlns:content="http://purl.org/rss/1.0/modules/content/">
8093 <channel>
8094 XML
8095                 print "<title>$title</title>\n" .
8096                       "<link>$alt_url</link>\n" .
8097                       "<description>$descr</description>\n" .
8098                       "<language>en</language>\n" .
8099                       # project owner is responsible for 'editorial' content
8100                       "<managingEditor>$owner</managingEditor>\n";
8101                 if (defined $logo || defined $favicon) {
8102                         # prefer the logo to the favicon, since RSS
8103                         # doesn't allow both
8104                         my $img = esc_url($logo || $favicon);
8105                         print "<image>\n" .
8106                               "<url>$img</url>\n" .
8107                               "<title>$title</title>\n" .
8108                               "<link>$alt_url</link>\n" .
8109                               "</image>\n";
8110                 }
8111                 if (%latest_date) {
8112                         print "<pubDate>$latest_date{'rfc2822'}</pubDate>\n";
8113                         print "<lastBuildDate>$latest_date{'rfc2822'}</lastBuildDate>\n";
8114                 }
8115                 print "<generator>gitweb v.$version/$git_version</generator>\n";
8116         } elsif ($format eq 'atom') {
8117                 print <<XML;
8118 <feed xmlns="http://www.w3.org/2005/Atom">
8119 XML
8120                 print "<title>$title</title>\n" .
8121                       "<subtitle>$descr</subtitle>\n" .
8122                       '<link rel="alternate" type="text/html" href="' .
8123                       $alt_url . '" />' . "\n" .
8124                       '<link rel="self" type="' . $content_type . '" href="' .
8125                       $cgi->self_url() . '" />' . "\n" .
8126                       "<id>" . href(-full=>1) . "</id>\n" .
8127                       # use project owner for feed author
8128                       "<author><name>$owner</name></author>\n";
8129                 if (defined $favicon) {
8130                         print "<icon>" . esc_url($favicon) . "</icon>\n";
8131                 }
8132                 if (defined $logo) {
8133                         # not twice as wide as tall: 72 x 27 pixels
8134                         print "<logo>" . esc_url($logo) . "</logo>\n";
8135                 }
8136                 if (! %latest_date) {
8137                         # dummy date to keep the feed valid until commits trickle in:
8138                         print "<updated>1970-01-01T00:00:00Z</updated>\n";
8139                 } else {
8140                         print "<updated>$latest_date{'iso-8601'}</updated>\n";
8141                 }
8142                 print "<generator version='$version/$git_version'>gitweb</generator>\n";
8143         }
8144
8145         # contents
8146         for (my $i = 0; $i <= $#commitlist; $i++) {
8147                 my %co = %{$commitlist[$i]};
8148                 my $commit = $co{'id'};
8149                 # we read 150, we always show 30 and the ones more recent than 48 hours
8150                 if (($i >= 20) && ((time - $co{'author_epoch'}) > 48*60*60)) {
8151                         last;
8152                 }
8153                 my %cd = parse_date($co{'author_epoch'}, $co{'author_tz'});
8154
8155                 # get list of changed files
8156                 open my $fd, "-|", git_cmd(), "diff-tree", '-r', @diff_opts,
8157                         $co{'parent'} || "--root",
8158                         $co{'id'}, "--", (defined $file_name ? $file_name : ())
8159                         or next;
8160                 my @difftree = map { chomp; $_ } <$fd>;
8161                 close $fd
8162                         or next;
8163
8164                 # print element (entry, item)
8165                 my $co_url = href(-full=>1, action=>"commitdiff", hash=>$commit);
8166                 if ($format eq 'rss') {
8167                         print "<item>\n" .
8168                               "<title>" . esc_html($co{'title'}) . "</title>\n" .
8169                               "<author>" . esc_html($co{'author'}) . "</author>\n" .
8170                               "<pubDate>$cd{'rfc2822'}</pubDate>\n" .
8171                               "<guid isPermaLink=\"true\">$co_url</guid>\n" .
8172                               "<link>$co_url</link>\n" .
8173                               "<description>" . esc_html($co{'title'}) . "</description>\n" .
8174                               "<content:encoded>" .
8175                               "<![CDATA[\n";
8176                 } elsif ($format eq 'atom') {
8177                         print "<entry>\n" .
8178                               "<title type=\"html\">" . esc_html($co{'title'}) . "</title>\n" .
8179                               "<updated>$cd{'iso-8601'}</updated>\n" .
8180                               "<author>\n" .
8181                               "  <name>" . esc_html($co{'author_name'}) . "</name>\n";
8182                         if ($co{'author_email'}) {
8183                                 print "  <email>" . esc_html($co{'author_email'}) . "</email>\n";
8184                         }
8185                         print "</author>\n" .
8186                               # use committer for contributor
8187                               "<contributor>\n" .
8188                               "  <name>" . esc_html($co{'committer_name'}) . "</name>\n";
8189                         if ($co{'committer_email'}) {
8190                                 print "  <email>" . esc_html($co{'committer_email'}) . "</email>\n";
8191                         }
8192                         print "</contributor>\n" .
8193                               "<published>$cd{'iso-8601'}</published>\n" .
8194                               "<link rel=\"alternate\" type=\"text/html\" href=\"$co_url\" />\n" .
8195                               "<id>$co_url</id>\n" .
8196                               "<content type=\"xhtml\" xml:base=\"" . esc_url($my_url) . "\">\n" .
8197                               "<div xmlns=\"http://www.w3.org/1999/xhtml\">\n";
8198                 }
8199                 my $comment = $co{'comment'};
8200                 print "<pre>\n";
8201                 foreach my $line (@$comment) {
8202                         $line = esc_html($line);
8203                         print "$line\n";
8204                 }
8205                 print "</pre><ul>\n";
8206                 foreach my $difftree_line (@difftree) {
8207                         my %difftree = parse_difftree_raw_line($difftree_line);
8208                         next if !$difftree{'from_id'};
8209
8210                         my $file = $difftree{'file'} || $difftree{'to_file'};
8211
8212                         print "<li>" .
8213                               "[" .
8214                               $cgi->a({-href => href(-full=>1, action=>"blobdiff",
8215                                                      hash=>$difftree{'to_id'}, hash_parent=>$difftree{'from_id'},
8216                                                      hash_base=>$co{'id'}, hash_parent_base=>$co{'parent'},
8217                                                      file_name=>$file, file_parent=>$difftree{'from_file'}),
8218                                       -title => "diff"}, 'D');
8219                         if ($have_blame) {
8220                                 print $cgi->a({-href => href(-full=>1, action=>"blame",
8221                                                              file_name=>$file, hash_base=>$commit),
8222                                               -title => "blame"}, 'B');
8223                         }
8224                         # if this is not a feed of a file history
8225                         if (!defined $file_name || $file_name ne $file) {
8226                                 print $cgi->a({-href => href(-full=>1, action=>"history",
8227                                                              file_name=>$file, hash=>$commit),
8228                                               -title => "history"}, 'H');
8229                         }
8230                         $file = esc_path($file);
8231                         print "] ".
8232                               "$file</li>\n";
8233                 }
8234                 if ($format eq 'rss') {
8235                         print "</ul>]]>\n" .
8236                               "</content:encoded>\n" .
8237                               "</item>\n";
8238                 } elsif ($format eq 'atom') {
8239                         print "</ul>\n</div>\n" .
8240                               "</content>\n" .
8241                               "</entry>\n";
8242                 }
8243         }
8244
8245         # end of feed
8246         if ($format eq 'rss') {
8247                 print "</channel>\n</rss>\n";
8248         } elsif ($format eq 'atom') {
8249                 print "</feed>\n";
8250         }
8251 }
8252
8253 sub git_rss {
8254         git_feed('rss');
8255 }
8256
8257 sub git_atom {
8258         git_feed('atom');
8259 }
8260
8261 sub git_opml {
8262         my @list = git_get_projects_list($project_filter, $strict_export);
8263         if (!@list) {
8264                 die_error(404, "No projects found");
8265         }
8266
8267         print $cgi->header(
8268                 -type => 'text/xml',
8269                 -charset => 'utf-8',
8270                 -content_disposition => 'inline; filename="opml.xml"');
8271
8272         my $title = esc_html($site_name);
8273         my $filter = " within subdirectory ";
8274         if (defined $project_filter) {
8275                 $filter .= esc_html($project_filter);
8276         } else {
8277                 $filter = "";
8278         }
8279         print <<XML;
8280 <?xml version="1.0" encoding="utf-8"?>
8281 <opml version="1.0">
8282 <head>
8283   <title>$title OPML Export$filter</title>
8284 </head>
8285 <body>
8286 <outline text="git RSS feeds">
8287 XML
8288
8289         foreach my $pr (@list) {
8290                 my %proj = %$pr;
8291                 my $head = git_get_head_hash($proj{'path'});
8292                 if (!defined $head) {
8293                         next;
8294                 }
8295                 $git_dir = "$projectroot/$proj{'path'}";
8296                 my %co = parse_commit($head);
8297                 if (!%co) {
8298                         next;
8299                 }
8300
8301                 my $path = esc_html(chop_str($proj{'path'}, 25, 5));
8302                 my $rss  = href('project' => $proj{'path'}, 'action' => 'rss', -full => 1);
8303                 my $html = href('project' => $proj{'path'}, 'action' => 'summary', -full => 1);
8304                 print "<outline type=\"rss\" text=\"$path\" title=\"$path\" xmlUrl=\"$rss\" htmlUrl=\"$html\"/>\n";
8305         }
8306         print <<XML;
8307 </outline>
8308 </body>
8309 </opml>
8310 XML
8311 }