git.oblomov.eu Git - git/blob - gitweb/gitweb.perl

   1 #!/usr/bin/perl
   2
   3 # gitweb - simple web interface to track changes in git repositories
   4 #
   5 # (C) 2005-2006, Kay Sievers <kay.sievers@vrfy.org>
   6 # (C) 2005, Christian Gierke
   7 #
   8 # This program is licensed under the GPLv2
   9
  10 use 5.008;
  11 use strict;
  12 use warnings;
  13 use CGI qw(:standard :escapeHTML -nosticky);
  14 use CGI::Util qw(unescape);
  15 use CGI::Carp qw(fatalsToBrowser set_message);
  16 use Encode;
  17 use Fcntl ':mode';
  18 use File::Find qw();
  19 use File::Basename qw(basename);
  20 use Time::HiRes qw(gettimeofday tv_interval);
  21 binmode STDOUT, ':utf8';
  22
  23 our $t0 = [ gettimeofday() ];
  24 our $number_of_git_cmds = 0;
  25
  26 BEGIN {
  27         CGI->compile() if $ENV{'MOD_PERL'};
  28 }
  29
  30 our $version = "++GIT_VERSION++";
  31
  32 our ($my_url, $my_uri, $base_url, $path_info, $home_link);
  33 sub evaluate_uri {
  34         our $cgi;
  35
  36         our $my_url = $cgi->url();
  37         our $my_uri = $cgi->url(-absolute => 1);
  38
  39         # Base URL for relative URLs in gitweb ($logo, $favicon, ...),
  40         # needed and used only for URLs with nonempty PATH_INFO
  41         our $base_url = $my_url;
  42
  43         # When the script is used as DirectoryIndex, the URL does not contain the name
  44         # of the script file itself, and $cgi->url() fails to strip PATH_INFO, so we
  45         # have to do it ourselves. We make $path_info global because it's also used
  46         # later on.
  47         #
  48         # Another issue with the script being the DirectoryIndex is that the resulting
  49         # $my_url data is not the full script URL: this is good, because we want
  50         # generated links to keep implying the script name if it wasn't explicitly
  51         # indicated in the URL we're handling, but it means that $my_url cannot be used
  52         # as base URL.
  53         # Therefore, if we needed to strip PATH_INFO, then we know that we have
  54         # to build the base URL ourselves:
  55         our $path_info = decode_utf8($ENV{"PATH_INFO"});
  56         if ($path_info) {
  57                 # $path_info has already been URL-decoded by the web server, but
  58                 # $my_url and $my_uri have not. URL-decode them so we can properly
  59                 # strip $path_info.
  60                 $my_url = unescape($my_url);
  61                 $my_uri = unescape($my_uri);
  62                 if ($my_url =~ s,\Q$path_info\E$,, &&
  63                     $my_uri =~ s,\Q$path_info\E$,, &&
  64                     defined $ENV{'SCRIPT_NAME'}) {
  65                         $base_url = $cgi->url(-base => 1) . $ENV{'SCRIPT_NAME'};
  66                 }
  67         }
  68
  69         # target of the home link on top of all pages
  70         our $home_link = $my_uri || "/";
  71 }
  72
  73 # core git executable to use
  74 # this can just be "git" if your webserver has a sensible PATH
  75 our $GIT = "++GIT_BINDIR++/git";
  76
  77 # absolute fs-path which will be prepended to the project path
  78 #our $projectroot = "/pub/scm";
  79 our $projectroot = "++GITWEB_PROJECTROOT++";
  80
  81 # fs traversing limit for getting project list
  82 # the number is relative to the projectroot
  83 our $project_maxdepth = "++GITWEB_PROJECT_MAXDEPTH++";
  84
  85 # string of the home link on top of all pages
  86 our $home_link_str = "++GITWEB_HOME_LINK_STR++";
  87
  88 # extra breadcrumbs preceding the home link
  89 our @extra_breadcrumbs = ();
  90
  91 # name of your site or organization to appear in page titles
  92 # replace this with something more descriptive for clearer bookmarks
  93 our $site_name = "++GITWEB_SITENAME++"
  94                  || ($ENV{'SERVER_NAME'} || "Untitled") . " Git";
  95
  96 # html snippet to include in the <head> section of each page
  97 our $site_html_head_string = "++GITWEB_SITE_HTML_HEAD_STRING++";
  98 # filename of html text to include at top of each page
  99 our $site_header = "++GITWEB_SITE_HEADER++";
 100 # html text to include at home page
 101 our $home_text = "++GITWEB_HOMETEXT++";
 102 # filename of html text to include at bottom of each page
 103 our $site_footer = "++GITWEB_SITE_FOOTER++";
 104
 105 # URI of stylesheets
 106 our @stylesheets = ("++GITWEB_CSS++");
 107 # URI of a single stylesheet, which can be overridden in GITWEB_CONFIG.
 108 our $stylesheet = undef;
 109 # URI of GIT logo (72x27 size)
 110 our $logo = "++GITWEB_LOGO++";
 111 # URI of GIT favicon, assumed to be image/png type
 112 our $favicon = "++GITWEB_FAVICON++";
 113 # URI of gitweb.js (JavaScript code for gitweb)
 114 our $javascript = "++GITWEB_JS++";
 115
 116 # URI and label (title) of GIT logo link
 117 #our $logo_url = "http://www.kernel.org/pub/software/scm/git/docs/";
 118 #our $logo_label = "git documentation";
 119 our $logo_url = "http://git-scm.com/";
 120 our $logo_label = "git homepage";
 121
 122 # source of projects list
 123 our $projects_list = "++GITWEB_LIST++";
 124
 125 # the width (in characters) of the projects list "Description" column
 126 our $projects_list_description_width = 25;
 127
 128 # group projects by category on the projects list
 129 # (enabled if this variable evaluates to true)
 130 our $projects_list_group_categories = 0;
 131
 132 # default category if none specified
 133 # (leave the empty string for no category)
 134 our $project_list_default_category = "";
 135
 136 # default order of projects list
 137 # valid values are none, project, descr, owner, and age
 138 our $default_projects_order = "project";
 139
 140 # show repository only if this file exists
 141 # (only effective if this variable evaluates to true)
 142 our $export_ok = "++GITWEB_EXPORT_OK++";
 143
 144 # don't generate age column on the projects list page
 145 our $omit_age_column = 0;
 146
 147 # don't generate information about owners of repositories
 148 our $omit_owner=0;
 149
 150 # show repository only if this subroutine returns true
 151 # when given the path to the project, for example:
 152 #    sub { return -e "$_[0]/git-daemon-export-ok"; }
 153 our $export_auth_hook = undef;
 154
 155 # only allow viewing of repositories also shown on the overview page
 156 our $strict_export = "++GITWEB_STRICT_EXPORT++";
 157
 158 # list of git base URLs used for URL to where fetch project from,
 159 # i.e. full URL is "$git_base_url/$project"
 160 our @git_base_url_list = grep { $_ ne '' } ("++GITWEB_BASE_URL++");
 161
 162 # default blob_plain mimetype and default charset for text/plain blob
 163 our $default_blob_plain_mimetype = 'text/plain';
 164 our $default_text_plain_charset  = undef;
 165
 166 # file to use for guessing MIME types before trying /etc/mime.types
 167 # (relative to the current git repository)
 168 our $mimetypes_file = undef;
 169
 170 # assume this charset if line contains non-UTF-8 characters;
 171 # it should be valid encoding (see Encoding::Supported(3pm) for list),
 172 # for which encoding all byte sequences are valid, for example
 173 # 'iso-8859-1' aka 'latin1' (it is decoded without checking, so it
 174 # could be even 'utf-8' for the old behavior)
 175 our $fallback_encoding = 'latin1';
 176
 177 # rename detection options for git-diff and git-diff-tree
 178 # - default is '-M', with the cost proportional to
 179 #   (number of removed files) * (number of new files).
 180 # - more costly is '-C' (which implies '-M'), with the cost proportional to
 181 #   (number of changed files + number of removed files) * (number of new files)
 182 # - even more costly is '-C', '--find-copies-harder' with cost
 183 #   (number of files in the original tree) * (number of new files)
 184 # - one might want to include '-B' option, e.g. '-B', '-M'
 185 our @diff_opts = ('-M'); # taken from git_commit
 186
 187 # Disables features that would allow repository owners to inject script into
 188 # the gitweb domain.
 189 our $prevent_xss = 0;
 190
 191 # Path to the highlight executable to use (must be the one from
 192 # http://www.andre-simon.de due to assumptions about parameters and output).
 193 # Useful if highlight is not installed on your webserver's PATH.
 194 # [Default: highlight]
 195 our $highlight_bin = "++HIGHLIGHT_BIN++";
 196
 197 # information about snapshot formats that gitweb is capable of serving
 198 our %known_snapshot_formats = (
 199         # name => {
 200         #       'display' => display name,
 201         #       'type' => mime type,
 202         #       'suffix' => filename suffix,
 203         #       'format' => --format for git-archive,
 204         #       'compressor' => [compressor command and arguments]
 205         #                       (array reference, optional)
 206         #       'disabled' => boolean (optional)}
 207         #
 208         'tgz' => {
 209                 'display' => 'tar.gz',
 210                 'type' => 'application/x-gzip',
 211                 'suffix' => '.tar.gz',
 212                 'format' => 'tar',
 213                 'compressor' => ['gzip', '-n']},
 214
 215         'tbz2' => {
 216                 'display' => 'tar.bz2',
 217                 'type' => 'application/x-bzip2',
 218                 'suffix' => '.tar.bz2',
 219                 'format' => 'tar',
 220                 'compressor' => ['bzip2']},
 221
 222         'txz' => {
 223                 'display' => 'tar.xz',
 224                 'type' => 'application/x-xz',
 225                 'suffix' => '.tar.xz',
 226                 'format' => 'tar',
 227                 'compressor' => ['xz'],
 228                 'disabled' => 1},
 229
 230         'zip' => {
 231                 'display' => 'zip',
 232                 'type' => 'application/x-zip',
 233                 'suffix' => '.zip',
 234                 'format' => 'zip'},
 235 );
 236
 237 # Aliases so we understand old gitweb.snapshot values in repository
 238 # configuration.
 239 our %known_snapshot_format_aliases = (
 240         'gzip'  => 'tgz',
 241         'bzip2' => 'tbz2',
 242         'xz'    => 'txz',
 243
 244         # backward compatibility: legacy gitweb config support
 245         'x-gzip' => undef, 'gz' => undef,
 246         'x-bzip2' => undef, 'bz2' => undef,
 247         'x-zip' => undef, '' => undef,
 248 );
 249
 250 # Pixel sizes for icons and avatars. If the default font sizes or lineheights
 251 # are changed, it may be appropriate to change these values too via
 252 # $GITWEB_CONFIG.
 253 our %avatar_size = (
 254         'default' => 16,
 255         'double'  => 32
 256 );
 257
 258 # Used to set the maximum load that we will still respond to gitweb queries.
 259 # If server load exceed this value then return "503 server busy" error.
 260 # If gitweb cannot determined server load, it is taken to be 0.
 261 # Leave it undefined (or set to 'undef') to turn off load checking.
 262 our $maxload = 300;
 263
 264 # configuration for 'highlight' (http://www.andre-simon.de/)
 265 # match by basename
 266 our %highlight_basename = (
 267         #'Program' => 'py',
 268         #'Library' => 'py',
 269         'SConstruct' => 'py', # SCons equivalent of Makefile
 270         'Makefile' => 'make',
 271 );
 272 # match by extension
 273 our %highlight_ext = (
 274         # main extensions, defining name of syntax;
 275         # see files in /usr/share/highlight/langDefs/ directory
 276         (map { $_ => $_ } qw(py rb java css js tex bib xml awk bat ini spec tcl sql)),
 277         # alternate extensions, see /etc/highlight/filetypes.conf
 278         (map { $_ => 'c'   } qw(c h)),
 279         (map { $_ => 'sh'  } qw(sh bash zsh ksh)),
 280         (map { $_ => 'cpp' } qw(cpp cxx c++ cc)),
 281         (map { $_ => 'php' } qw(php php3 php4 php5 phps)),
 282         (map { $_ => 'pl'  } qw(pl perl pm)), # perhaps also 'cgi'
 283         (map { $_ => 'make'} qw(make mak mk)),
 284         (map { $_ => 'xml' } qw(xml xhtml html htm)),
 285 );
 286
 287 # You define site-wide feature defaults here; override them with
 288 # $GITWEB_CONFIG as necessary.
 289 our %feature = (
 290         # feature => {
 291         #       'sub' => feature-sub (subroutine),
 292         #       'override' => allow-override (boolean),
 293         #       'default' => [ default options...] (array reference)}
 294         #
 295         # if feature is overridable (it means that allow-override has true value),
 296         # then feature-sub will be called with default options as parameters;
 297         # return value of feature-sub indicates if to enable specified feature
 298         #
 299         # if there is no 'sub' key (no feature-sub), then feature cannot be
 300         # overridden
 301         #
 302         # use gitweb_get_feature(<feature>) to retrieve the <feature> value
 303         # (an array) or gitweb_check_feature(<feature>) to check if <feature>
 304         # is enabled
 305
 306         # Enable the 'blame' blob view, showing the last commit that modified
 307         # each line in the file. This can be very CPU-intensive.
 308
 309         # To enable system wide have in $GITWEB_CONFIG
 310         # $feature{'blame'}{'default'} = [1];
 311         # To have project specific config enable override in $GITWEB_CONFIG
 312         # $feature{'blame'}{'override'} = 1;
 313         # and in project config gitweb.blame = 0|1;
 314         'blame' => {
 315                 'sub' => sub { feature_bool('blame', @_) },
 316                 'override' => 0,
 317                 'default' => [0]},
 318
 319         # Enable the 'snapshot' link, providing a compressed archive of any
 320         # tree. This can potentially generate high traffic if you have large
 321         # project.
 322
 323         # Value is a list of formats defined in %known_snapshot_formats that
 324         # you wish to offer.
 325         # To disable system wide have in $GITWEB_CONFIG
 326         # $feature{'snapshot'}{'default'} = [];
 327         # To have project specific config enable override in $GITWEB_CONFIG
 328         # $feature{'snapshot'}{'override'} = 1;
 329         # and in project config, a comma-separated list of formats or "none"
 330         # to disable.  Example: gitweb.snapshot = tbz2,zip;
 331         'snapshot' => {
 332                 'sub' => \&feature_snapshot,
 333                 'override' => 0,
 334                 'default' => ['tgz']},
 335
 336         # Enable text search, which will list the commits which match author,
 337         # committer or commit text to a given string.  Enabled by default.
 338         # Project specific override is not supported.
 339         #
 340         # Note that this controls all search features, which means that if
 341         # it is disabled, then 'grep' and 'pickaxe' search would also be
 342         # disabled.
 343         'search' => {
 344                 'override' => 0,
 345                 'default' => [1]},
 346
 347         # Enable grep search, which will list the files in currently selected
 348         # tree containing the given string. Enabled by default. This can be
 349         # potentially CPU-intensive, of course.
 350         # Note that you need to have 'search' feature enabled too.
 351
 352         # To enable system wide have in $GITWEB_CONFIG
 353         # $feature{'grep'}{'default'} = [1];
 354         # To have project specific config enable override in $GITWEB_CONFIG
 355         # $feature{'grep'}{'override'} = 1;
 356         # and in project config gitweb.grep = 0|1;
 357         'grep' => {
 358                 'sub' => sub { feature_bool('grep', @_) },
 359                 'override' => 0,
 360                 'default' => [1]},
 361
 362         # Enable the pickaxe search, which will list the commits that modified
 363         # a given string in a file. This can be practical and quite faster
 364         # alternative to 'blame', but still potentially CPU-intensive.
 365         # Note that you need to have 'search' feature enabled too.
 366
 367         # To enable system wide have in $GITWEB_CONFIG
 368         # $feature{'pickaxe'}{'default'} = [1];
 369         # To have project specific config enable override in $GITWEB_CONFIG
 370         # $feature{'pickaxe'}{'override'} = 1;
 371         # and in project config gitweb.pickaxe = 0|1;
 372         'pickaxe' => {
 373                 'sub' => sub { feature_bool('pickaxe', @_) },
 374                 'override' => 0,
 375                 'default' => [1]},
 376
 377         # Enable showing size of blobs in a 'tree' view, in a separate
 378         # column, similar to what 'ls -l' does.  This cost a bit of IO.
 379
 380         # To disable system wide have in $GITWEB_CONFIG
 381         # $feature{'show-sizes'}{'default'} = [0];
 382         # To have project specific config enable override in $GITWEB_CONFIG
 383         # $feature{'show-sizes'}{'override'} = 1;
 384         # and in project config gitweb.showsizes = 0|1;
 385         'show-sizes' => {
 386                 'sub' => sub { feature_bool('showsizes', @_) },
 387                 'override' => 0,
 388                 'default' => [1]},
 389
 390         # Make gitweb use an alternative format of the URLs which can be
 391         # more readable and natural-looking: project name is embedded
 392         # directly in the path and the query string contains other
 393         # auxiliary information. All gitweb installations recognize
 394         # URL in either format; this configures in which formats gitweb
 395         # generates links.
 396
 397         # To enable system wide have in $GITWEB_CONFIG
 398         # $feature{'pathinfo'}{'default'} = [1];
 399         # Project specific override is not supported.
 400
 401         # Note that you will need to change the default location of CSS,
 402         # favicon, logo and possibly other files to an absolute URL. Also,
 403         # if gitweb.cgi serves as your indexfile, you will need to force
 404         # $my_uri to contain the script name in your $GITWEB_CONFIG.
 405         'pathinfo' => {
 406                 'override' => 0,
 407                 'default' => [0]},
 408
 409         # Make gitweb consider projects in project root subdirectories
 410         # to be forks of existing projects. Given project $projname.git,
 411         # projects matching $projname/*.git will not be shown in the main
 412         # projects list, instead a '+' mark will be added to $projname
 413         # there and a 'forks' view will be enabled for the project, listing
 414         # all the forks. If project list is taken from a file, forks have
 415         # to be listed after the main project.
 416
 417         # To enable system wide have in $GITWEB_CONFIG
 418         # $feature{'forks'}{'default'} = [1];
 419         # Project specific override is not supported.
 420         'forks' => {
 421                 'override' => 0,
 422                 'default' => [0]},
 423
 424         # Insert custom links to the action bar of all project pages.
 425         # This enables you mainly to link to third-party scripts integrating
 426         # into gitweb; e.g. git-browser for graphical history representation
 427         # or custom web-based repository administration interface.
 428
 429         # The 'default' value consists of a list of triplets in the form
 430         # (label, link, position) where position is the label after which
 431         # to insert the link and link is a format string where %n expands
 432         # to the project name, %f to the project path within the filesystem,
 433         # %h to the current hash (h gitweb parameter) and %b to the current
 434         # hash base (hb gitweb parameter); %% expands to %.
 435
 436         # To enable system wide have in $GITWEB_CONFIG e.g.
 437         # $feature{'actions'}{'default'} = [('graphiclog',
 438         #       '/git-browser/by-commit.html?r=%n', 'summary')];
 439         # Project specific override is not supported.
 440         'actions' => {
 441                 'override' => 0,
 442                 'default' => []},
 443
 444         # Allow gitweb scan project content tags of project repository,
 445         # and display the popular Web 2.0-ish "tag cloud" near the projects
 446         # list.  Note that this is something COMPLETELY different from the
 447         # normal Git tags.
 448
 449         # gitweb by itself can show existing tags, but it does not handle
 450         # tagging itself; you need to do it externally, outside gitweb.
 451         # The format is described in git_get_project_ctags() subroutine.
 452         # You may want to install the HTML::TagCloud Perl module to get
 453         # a pretty tag cloud instead of just a list of tags.
 454
 455         # To enable system wide have in $GITWEB_CONFIG
 456         # $feature{'ctags'}{'default'} = [1];
 457         # Project specific override is not supported.
 458
 459         # In the future whether ctags editing is enabled might depend
 460         # on the value, but using 1 should always mean no editing of ctags.
 461         'ctags' => {
 462                 'override' => 0,
 463                 'default' => [0]},
 464
 465         # The maximum number of patches in a patchset generated in patch
 466         # view. Set this to 0 or undef to disable patch view, or to a
 467         # negative number to remove any limit.
 468
 469         # To disable system wide have in $GITWEB_CONFIG
 470         # $feature{'patches'}{'default'} = [0];
 471         # To have project specific config enable override in $GITWEB_CONFIG
 472         # $feature{'patches'}{'override'} = 1;
 473         # and in project config gitweb.patches = 0|n;
 474         # where n is the maximum number of patches allowed in a patchset.
 475         'patches' => {
 476                 'sub' => \&feature_patches,
 477                 'override' => 0,
 478                 'default' => [16]},
 479
 480         # Avatar support. When this feature is enabled, views such as
 481         # shortlog or commit will display an avatar associated with
 482         # the email of the committer(s) and/or author(s).
 483
 484         # Currently available providers are gravatar and picon.
 485         # If an unknown provider is specified, the feature is disabled.
 486
 487         # Gravatar depends on Digest::MD5.
 488         # Picon currently relies on the indiana.edu database.
 489
 490         # To enable system wide have in $GITWEB_CONFIG
 491         # $feature{'avatar'}{'default'} = ['<provider>'];
 492         # where <provider> is either gravatar or picon.
 493         # To have project specific config enable override in $GITWEB_CONFIG
 494         # $feature{'avatar'}{'override'} = 1;
 495         # and in project config gitweb.avatar = <provider>;
 496         'avatar' => {
 497                 'sub' => \&feature_avatar,
 498                 'override' => 0,
 499                 'default' => ['']},
 500
 501         # Enable displaying how much time and how many git commands
 502         # it took to generate and display page.  Disabled by default.
 503         # Project specific override is not supported.
 504         'timed' => {
 505                 'override' => 0,
 506                 'default' => [0]},
 507
 508         # Enable turning some links into links to actions which require
 509         # JavaScript to run (like 'blame_incremental').  Not enabled by
 510         # default.  Project specific override is currently not supported.
 511         'javascript-actions' => {
 512                 'override' => 0,
 513                 'default' => [0]},
 514
 515         # Enable and configure ability to change common timezone for dates
 516         # in gitweb output via JavaScript.  Enabled by default.
 517         # Project specific override is not supported.
 518         'javascript-timezone' => {
 519                 'override' => 0,
 520                 'default' => [
 521                         'local',     # default timezone: 'utc', 'local', or '(-|+)HHMM' format,
 522                                      # or undef to turn off this feature
 523                         'gitweb_tz', # name of cookie where to store selected timezone
 524                         'datetime',  # CSS class used to mark up dates for manipulation
 525                 ]},
 526
 527         # Syntax highlighting support. This is based on Daniel Svensson's
 528         # and Sham Chukoury's work in gitweb-xmms2.git.
 529         # It requires the 'highlight' program present in $PATH,
 530         # and therefore is disabled by default.
 531
 532         # To enable system wide have in $GITWEB_CONFIG
 533         # $feature{'highlight'}{'default'} = [1];
 534
 535         'highlight' => {
 536                 'sub' => sub { feature_bool('highlight', @_) },
 537                 'override' => 0,
 538                 'default' => [0]},
 539
 540         # Enable displaying of remote heads in the heads list
 541
 542         # To enable system wide have in $GITWEB_CONFIG
 543         # $feature{'remote_heads'}{'default'} = [1];
 544         # To have project specific config enable override in $GITWEB_CONFIG
 545         # $feature{'remote_heads'}{'override'} = 1;
 546         # and in project config gitweb.remoteheads = 0|1;
 547         'remote_heads' => {
 548                 'sub' => sub { feature_bool('remote_heads', @_) },
 549                 'override' => 0,
 550                 'default' => [0]},
 551 );
 552
 553 sub gitweb_get_feature {
 554         my ($name) = @_;
 555         return unless exists $feature{$name};
 556         my ($sub, $override, @defaults) = (
 557                 $feature{$name}{'sub'},
 558                 $feature{$name}{'override'},
 559                 @{$feature{$name}{'default'}});
 560         # project specific override is possible only if we have project
 561         our $git_dir; # global variable, declared later
 562         if (!$override || !defined $git_dir) {
 563                 return @defaults;
 564         }
 565         if (!defined $sub) {
 566                 warn "feature $name is not overridable";
 567                 return @defaults;
 568         }
 569         return $sub->(@defaults);
 570 }
 571
 572 # A wrapper to check if a given feature is enabled.
 573 # With this, you can say
 574 #
 575 #   my $bool_feat = gitweb_check_feature('bool_feat');
 576 #   gitweb_check_feature('bool_feat') or somecode;
 577 #
 578 # instead of
 579 #
 580 #   my ($bool_feat) = gitweb_get_feature('bool_feat');
 581 #   (gitweb_get_feature('bool_feat'))[0] or somecode;
 582 #
 583 sub gitweb_check_feature {
 584         return (gitweb_get_feature(@_))[0];
 585 }
 586
 587
 588 sub feature_bool {
 589         my $key = shift;
 590         my ($val) = git_get_project_config($key, '--bool');
 591
 592         if (!defined $val) {
 593                 return ($_[0]);
 594         } elsif ($val eq 'true') {
 595                 return (1);
 596         } elsif ($val eq 'false') {
 597                 return (0);
 598         }
 599 }
 600
 601 sub feature_snapshot {
 602         my (@fmts) = @_;
 603
 604         my ($val) = git_get_project_config('snapshot');
 605
 606         if ($val) {
 607                 @fmts = ($val eq 'none' ? () : split /\s*[,\s]\s*/, $val);
 608         }
 609
 610         return @fmts;
 611 }
 612
 613 sub feature_patches {
 614         my @val = (git_get_project_config('patches', '--int'));
 615
 616         if (@val) {
 617                 return @val;
 618         }
 619
 620         return ($_[0]);
 621 }
 622
 623 sub feature_avatar {
 624         my @val = (git_get_project_config('avatar'));
 625
 626         return @val ? @val : @_;
 627 }
 628
 629 # checking HEAD file with -e is fragile if the repository was
 630 # initialized long time ago (i.e. symlink HEAD) and was pack-ref'ed
 631 # and then pruned.
 632 sub check_head_link {
 633         my ($dir) = @_;
 634         my $headfile = "$dir/HEAD";
 635         return ((-e $headfile) ||
 636                 (-l $headfile && readlink($headfile) =~ /^refs\/heads\//));
 637 }
 638
 639 sub check_export_ok {
 640         my ($dir) = @_;
 641         return (check_head_link($dir) &&
 642                 (!$export_ok || -e "$dir/$export_ok") &&
 643                 (!$export_auth_hook || $export_auth_hook->($dir)));
 644 }
 645
 646 # process alternate names for backward compatibility
 647 # filter out unsupported (unknown) snapshot formats
 648 sub filter_snapshot_fmts {
 649         my @fmts = @_;
 650
 651         @fmts = map {
 652                 exists $known_snapshot_format_aliases{$_} ?
 653                        $known_snapshot_format_aliases{$_} : $_} @fmts;
 654         @fmts = grep {
 655                 exists $known_snapshot_formats{$_} &&
 656                 !$known_snapshot_formats{$_}{'disabled'}} @fmts;
 657 }
 658
 659 # If it is set to code reference, it is code that it is to be run once per
 660 # request, allowing updating configurations that change with each request,
 661 # while running other code in config file only once.
 662 #
 663 # Otherwise, if it is false then gitweb would process config file only once;
 664 # if it is true then gitweb config would be run for each request.
 665 our $per_request_config = 1;
 666
 667 # read and parse gitweb config file given by its parameter.
 668 # returns true on success, false on recoverable error, allowing
 669 # to chain this subroutine, using first file that exists.
 670 # dies on errors during parsing config file, as it is unrecoverable.
 671 sub read_config_file {
 672         my $filename = shift;
 673         return unless defined $filename;
 674         # die if there are errors parsing config file
 675         if (-e $filename) {
 676                 do $filename;
 677                 die $@ if $@;
 678                 return 1;
 679         }
 680         return;
 681 }
 682
 683 our ($GITWEB_CONFIG, $GITWEB_CONFIG_SYSTEM, $GITWEB_CONFIG_COMMON);
 684 sub evaluate_gitweb_config {
 685         our $GITWEB_CONFIG = $ENV{'GITWEB_CONFIG'} || "++GITWEB_CONFIG++";
 686         our $GITWEB_CONFIG_SYSTEM = $ENV{'GITWEB_CONFIG_SYSTEM'} || "++GITWEB_CONFIG_SYSTEM++";
 687         our $GITWEB_CONFIG_COMMON = $ENV{'GITWEB_CONFIG_COMMON'} || "++GITWEB_CONFIG_COMMON++";
 688
 689         # Protect against duplications of file names, to not read config twice.
 690         # Only one of $GITWEB_CONFIG and $GITWEB_CONFIG_SYSTEM is used, so
 691         # there possibility of duplication of filename there doesn't matter.
 692         $GITWEB_CONFIG = ""        if ($GITWEB_CONFIG eq $GITWEB_CONFIG_COMMON);
 693         $GITWEB_CONFIG_SYSTEM = "" if ($GITWEB_CONFIG_SYSTEM eq $GITWEB_CONFIG_COMMON);
 694
 695         # Common system-wide settings for convenience.
 696         # Those settings can be ovverriden by GITWEB_CONFIG or GITWEB_CONFIG_SYSTEM.
 697         read_config_file($GITWEB_CONFIG_COMMON);
 698
 699         # Use first config file that exists.  This means use the per-instance
 700         # GITWEB_CONFIG if exists, otherwise use GITWEB_SYSTEM_CONFIG.
 701         read_config_file($GITWEB_CONFIG) and return;
 702         read_config_file($GITWEB_CONFIG_SYSTEM);
 703 }
 704
 705 # Get loadavg of system, to compare against $maxload.
 706 # Currently it requires '/proc/loadavg' present to get loadavg;
 707 # if it is not present it returns 0, which means no load checking.
 708 sub get_loadavg {
 709         if( -e '/proc/loadavg' ){
 710                 open my $fd, '<', '/proc/loadavg'
 711                         or return 0;
 712                 my @load = split(/\s+/, scalar <$fd>);
 713                 close $fd;
 714
 715                 # The first three columns measure CPU and IO utilization of the last one,
 716                 # five, and 10 minute periods.  The fourth column shows the number of
 717                 # currently running processes and the total number of processes in the m/n
 718                 # format.  The last column displays the last process ID used.
 719                 return $load[0] || 0;
 720         }
 721         # additional checks for load average should go here for things that don't export
 722         # /proc/loadavg
 723
 724         return 0;
 725 }
 726
 727 # version of the core git binary
 728 our $git_version;
 729 sub evaluate_git_version {
 730         our $git_version = qx("$GIT" --version) =~ m/git version (.*)$/ ? $1 : "unknown";
 731         $number_of_git_cmds++;
 732 }
 733
 734 sub check_loadavg {
 735         if (defined $maxload && get_loadavg() > $maxload) {
 736                 die_error(503, "The load average on the server is too high");
 737         }
 738 }
 739
 740 # ======================================================================
 741 # input validation and dispatch
 742
 743 # input parameters can be collected from a variety of sources (presently, CGI
 744 # and PATH_INFO), so we define an %input_params hash that collects them all
 745 # together during validation: this allows subsequent uses (e.g. href()) to be
 746 # agnostic of the parameter origin
 747
 748 our %input_params = ();
 749
 750 # input parameters are stored with the long parameter name as key. This will
 751 # also be used in the href subroutine to convert parameters to their CGI
 752 # equivalent, and since the href() usage is the most frequent one, we store
 753 # the name -> CGI key mapping here, instead of the reverse.
 754 #
 755 # XXX: Warning: If you touch this, check the search form for updating,
 756 # too.
 757
 758 our @cgi_param_mapping = (
 759         project => "p",
 760         action => "a",
 761         file_name => "f",
 762         file_parent => "fp",
 763         hash => "h",
 764         hash_parent => "hp",
 765         hash_base => "hb",
 766         hash_parent_base => "hpb",
 767         page => "pg",
 768         order => "o",
 769         searchtext => "s",
 770         searchtype => "st",
 771         snapshot_format => "sf",
 772         extra_options => "opt",
 773         search_use_regexp => "sr",
 774         ctag => "by_tag",
 775         diff_style => "ds",
 776         project_filter => "pf",
 777         # this must be last entry (for manipulation from JavaScript)
 778         javascript => "js"
 779 );
 780 our %cgi_param_mapping = @cgi_param_mapping;
 781
 782 # we will also need to know the possible actions, for validation
 783 our %actions = (
 784         "blame" => \&git_blame,
 785         "blame_incremental" => \&git_blame_incremental,
 786         "blame_data" => \&git_blame_data,
 787         "blobdiff" => \&git_blobdiff,
 788         "blobdiff_plain" => \&git_blobdiff_plain,
 789         "blob" => \&git_blob,
 790         "blob_plain" => \&git_blob_plain,
 791         "commitdiff" => \&git_commitdiff,
 792         "commitdiff_plain" => \&git_commitdiff_plain,
 793         "commit" => \&git_commit,
 794         "forks" => \&git_forks,
 795         "heads" => \&git_heads,
 796         "history" => \&git_history,
 797         "log" => \&git_log,
 798         "patch" => \&git_patch,
 799         "patches" => \&git_patches,
 800         "remotes" => \&git_remotes,
 801         "rss" => \&git_rss,
 802         "atom" => \&git_atom,
 803         "search" => \&git_search,
 804         "search_help" => \&git_search_help,
 805         "shortlog" => \&git_shortlog,
 806         "summary" => \&git_summary,
 807         "tag" => \&git_tag,
 808         "tags" => \&git_tags,
 809         "tree" => \&git_tree,
 810         "snapshot" => \&git_snapshot,
 811         "object" => \&git_object,
 812         # those below don't need $project
 813         "opml" => \&git_opml,
 814         "project_list" => \&git_project_list,
 815         "project_index" => \&git_project_index,
 816 );
 817
 818 # finally, we have the hash of allowed extra_options for the commands that
 819 # allow them
 820 our %allowed_options = (
 821         "--no-merges" => [ qw(rss atom log shortlog history) ],
 822 );
 823
 824 # fill %input_params with the CGI parameters. All values except for 'opt'
 825 # should be single values, but opt can be an array. We should probably
 826 # build an array of parameters that can be multi-valued, but since for the time
 827 # being it's only this one, we just single it out
 828 sub evaluate_query_params {
 829         our $cgi;
 830
 831         while (my ($name, $symbol) = each %cgi_param_mapping) {
 832                 if ($symbol eq 'opt') {
 833                         $input_params{$name} = [ map { decode_utf8($_) } $cgi->param($symbol) ];
 834                 } else {
 835                         $input_params{$name} = decode_utf8($cgi->param($symbol));
 836                 }
 837         }
 838 }
 839
 840 # now read PATH_INFO and update the parameter list for missing parameters
 841 sub evaluate_path_info {
 842         return if defined $input_params{'project'};
 843         return if !$path_info;
 844         $path_info =~ s,^/+,,;
 845         return if !$path_info;
 846
 847         # find which part of PATH_INFO is project
 848         my $project = $path_info;
 849         $project =~ s,/+$,,;
 850         while ($project && !check_head_link("$projectroot/$project")) {
 851                 $project =~ s,/*[^/]*$,,;
 852         }
 853         return unless $project;
 854         $input_params{'project'} = $project;
 855
 856         # do not change any parameters if an action is given using the query string
 857         return if $input_params{'action'};
 858         $path_info =~ s,^\Q$project\E/*,,;
 859
 860         # next, check if we have an action
 861         my $action = $path_info;
 862         $action =~ s,/.*$,,;
 863         if (exists $actions{$action}) {
 864                 $path_info =~ s,^$action/*,,;
 865                 $input_params{'action'} = $action;
 866         }
 867
 868         # list of actions that want hash_base instead of hash, but can have no
 869         # pathname (f) parameter
 870         my @wants_base = (
 871                 'tree',
 872                 'history',
 873         );
 874
 875         # we want to catch, among others
 876         # [$hash_parent_base[:$file_parent]..]$hash_parent[:$file_name]
 877         my ($parentrefname, $parentpathname, $refname, $pathname) =
 878                 ($path_info =~ /^(?:(.+?)(?::(.+))?\.\.)?([^:]+?)?(?::(.+))?$/);
 879
 880         # first, analyze the 'current' part
 881         if (defined $pathname) {
 882                 # we got "branch:filename" or "branch:dir/"
 883                 # we could use git_get_type(branch:pathname), but:
 884                 # - it needs $git_dir
 885                 # - it does a git() call
 886                 # - the convention of terminating directories with a slash
 887                 #   makes it superfluous
 888                 # - embedding the action in the PATH_INFO would make it even
 889                 #   more superfluous
 890                 $pathname =~ s,^/+,,;
 891                 if (!$pathname || substr($pathname, -1) eq "/") {
 892                         $input_params{'action'} ||= "tree";
 893                         $pathname =~ s,/$,,;
 894                 } else {
 895                         # the default action depends on whether we had parent info
 896                         # or not
 897                         if ($parentrefname) {
 898                                 $input_params{'action'} ||= "blobdiff_plain";
 899                         } else {
 900                                 $input_params{'action'} ||= "blob_plain";
 901                         }
 902                 }
 903                 $input_params{'hash_base'} ||= $refname;
 904                 $input_params{'file_name'} ||= $pathname;
 905         } elsif (defined $refname) {
 906                 # we got "branch". In this case we have to choose if we have to
 907                 # set hash or hash_base.
 908                 #
 909                 # Most of the actions without a pathname only want hash to be
 910                 # set, except for the ones specified in @wants_base that want
 911                 # hash_base instead. It should also be noted that hand-crafted
 912                 # links having 'history' as an action and no pathname or hash
 913                 # set will fail, but that happens regardless of PATH_INFO.
 914                 if (defined $parentrefname) {
 915                         # if there is parent let the default be 'shortlog' action
 916                         # (for http://git.example.com/repo.git/A..B links); if there
 917                         # is no parent, dispatch will detect type of object and set
 918                         # action appropriately if required (if action is not set)
 919                         $input_params{'action'} ||= "shortlog";
 920                 }
 921                 if ($input_params{'action'} &&
 922                     grep { $_ eq $input_params{'action'} } @wants_base) {
 923                         $input_params{'hash_base'} ||= $refname;
 924                 } else {
 925                         $input_params{'hash'} ||= $refname;
 926                 }
 927         }
 928
 929         # next, handle the 'parent' part, if present
 930         if (defined $parentrefname) {
 931                 # a missing pathspec defaults to the 'current' filename, allowing e.g.
 932                 # someproject/blobdiff/oldrev..newrev:/filename
 933                 if ($parentpathname) {
 934                         $parentpathname =~ s,^/+,,;
 935                         $parentpathname =~ s,/$,,;
 936                         $input_params{'file_parent'} ||= $parentpathname;
 937                 } else {
 938                         $input_params{'file_parent'} ||= $input_params{'file_name'};
 939                 }
 940                 # we assume that hash_parent_base is wanted if a path was specified,
 941                 # or if the action wants hash_base instead of hash
 942                 if (defined $input_params{'file_parent'} ||
 943                         grep { $_ eq $input_params{'action'} } @wants_base) {
 944                         $input_params{'hash_parent_base'} ||= $parentrefname;
 945                 } else {
 946                         $input_params{'hash_parent'} ||= $parentrefname;
 947                 }
 948         }
 949
 950         # for the snapshot action, we allow URLs in the form
 951         # $project/snapshot/$hash.ext
 952         # where .ext determines the snapshot and gets removed from the
 953         # passed $refname to provide the $hash.
 954         #
 955         # To be able to tell that $refname includes the format extension, we
 956         # require the following two conditions to be satisfied:
 957         # - the hash input parameter MUST have been set from the $refname part
 958         #   of the URL (i.e. they must be equal)
 959         # - the snapshot format MUST NOT have been defined already (e.g. from
 960         #   CGI parameter sf)
 961         # It's also useless to try any matching unless $refname has a dot,
 962         # so we check for that too
 963         if (defined $input_params{'action'} &&
 964                 $input_params{'action'} eq 'snapshot' &&
 965                 defined $refname && index($refname, '.') != -1 &&
 966                 $refname eq $input_params{'hash'} &&
 967                 !defined $input_params{'snapshot_format'}) {
 968                 # We loop over the known snapshot formats, checking for
 969                 # extensions. Allowed extensions are both the defined suffix
 970                 # (which includes the initial dot already) and the snapshot
 971                 # format key itself, with a prepended dot
 972                 while (my ($fmt, $opt) = each %known_snapshot_formats) {
 973                         my $hash = $refname;
 974                         unless ($hash =~ s/(\Q$opt->{'suffix'}\E|\Q.$fmt\E)$//) {
 975                                 next;
 976                         }
 977                         my $sfx = $1;
 978                         # a valid suffix was found, so set the snapshot format
 979                         # and reset the hash parameter
 980                         $input_params{'snapshot_format'} = $fmt;
 981                         $input_params{'hash'} = $hash;
 982                         # we also set the format suffix to the one requested
 983                         # in the URL: this way a request for e.g. .tgz returns
 984                         # a .tgz instead of a .tar.gz
 985                         $known_snapshot_formats{$fmt}{'suffix'} = $sfx;
 986                         last;
 987                 }
 988         }
 989 }
 990
 991 our ($action, $project, $file_name, $file_parent, $hash, $hash_parent, $hash_base,
 992      $hash_parent_base, @extra_options, $page, $searchtype, $search_use_regexp,
 993      $searchtext, $search_regexp, $project_filter);
 994 sub evaluate_and_validate_params {
 995         our $action = $input_params{'action'};
 996         if (defined $action) {
 997                 if (!validate_action($action)) {
 998                         die_error(400, "Invalid action parameter");
 999                 }
1000         }
1001
1002         # parameters which are pathnames
1003         our $project = $input_params{'project'};
1004         if (defined $project) {
1005                 if (!validate_project($project)) {
1006                         undef $project;
1007                         die_error(404, "No such project");
1008                 }
1009         }
1010
1011         our $project_filter = $input_params{'project_filter'};
1012         if (defined $project_filter) {
1013                 if (!validate_pathname($project_filter)) {
1014                         die_error(404, "Invalid project_filter parameter");
1015                 }
1016         }
1017
1018         our $file_name = $input_params{'file_name'};
1019         if (defined $file_name) {
1020                 if (!validate_pathname($file_name)) {
1021                         die_error(400, "Invalid file parameter");
1022                 }
1023         }
1024
1025         our $file_parent = $input_params{'file_parent'};
1026         if (defined $file_parent) {
1027                 if (!validate_pathname($file_parent)) {
1028                         die_error(400, "Invalid file parent parameter");
1029                 }
1030         }
1031
1032         # parameters which are refnames
1033         our $hash = $input_params{'hash'};
1034         if (defined $hash) {
1035                 if (!validate_refname($hash)) {
1036                         die_error(400, "Invalid hash parameter");
1037                 }
1038         }
1039
1040         our $hash_parent = $input_params{'hash_parent'};
1041         if (defined $hash_parent) {
1042                 if (!validate_refname($hash_parent)) {
1043                         die_error(400, "Invalid hash parent parameter");
1044                 }
1045         }
1046
1047         our $hash_base = $input_params{'hash_base'};
1048         if (defined $hash_base) {
1049                 if (!validate_refname($hash_base)) {
1050                         die_error(400, "Invalid hash base parameter");
1051                 }
1052         }
1053
1054         our @extra_options = @{$input_params{'extra_options'}};
1055         # @extra_options is always defined, since it can only be (currently) set from
1056         # CGI, and $cgi->param() returns the empty array in array context if the param
1057         # is not set
1058         foreach my $opt (@extra_options) {
1059                 if (not exists $allowed_options{$opt}) {
1060                         die_error(400, "Invalid option parameter");
1061                 }
1062                 if (not grep(/^$action$/, @{$allowed_options{$opt}})) {
1063                         die_error(400, "Invalid option parameter for this action");
1064                 }
1065         }
1066
1067         our $hash_parent_base = $input_params{'hash_parent_base'};
1068         if (defined $hash_parent_base) {
1069                 if (!validate_refname($hash_parent_base)) {
1070                         die_error(400, "Invalid hash parent base parameter");
1071                 }
1072         }
1073
1074         # other parameters
1075         our $page = $input_params{'page'};
1076         if (defined $page) {
1077                 if ($page =~ m/[^0-9]/) {
1078                         die_error(400, "Invalid page parameter");
1079                 }
1080         }
1081
1082         our $searchtype = $input_params{'searchtype'};
1083         if (defined $searchtype) {
1084                 if ($searchtype =~ m/[^a-z]/) {
1085                         die_error(400, "Invalid searchtype parameter");
1086                 }
1087         }
1088
1089         our $search_use_regexp = $input_params{'search_use_regexp'};
1090
1091         our $searchtext = $input_params{'searchtext'};
1092         our $search_regexp = undef;
1093         if (defined $searchtext) {
1094                 if (length($searchtext) < 2) {
1095                         die_error(403, "At least two characters are required for search parameter");
1096                 }
1097                 if ($search_use_regexp) {
1098                         $search_regexp = $searchtext;
1099                         if (!eval { qr/$search_regexp/; 1; }) {
1100                                 (my $error = $@) =~ s/ at \S+ line \d+.*\n?//;
1101                                 die_error(400, "Invalid search regexp '$search_regexp'",
1102                                           esc_html($error));
1103                         }
1104                 } else {
1105                         $search_regexp = quotemeta $searchtext;
1106                 }
1107         }
1108 }
1109
1110 # path to the current git repository
1111 our $git_dir;
1112 sub evaluate_git_dir {
1113         our $git_dir = "$projectroot/$project" if $project;
1114 }
1115
1116 our (@snapshot_fmts, $git_avatar);
1117 sub configure_gitweb_features {
1118         # list of supported snapshot formats
1119         our @snapshot_fmts = gitweb_get_feature('snapshot');
1120         @snapshot_fmts = filter_snapshot_fmts(@snapshot_fmts);
1121
1122         # check that the avatar feature is set to a known provider name,
1123         # and for each provider check if the dependencies are satisfied.
1124         # if the provider name is invalid or the dependencies are not met,
1125         # reset $git_avatar to the empty string.
1126         our ($git_avatar) = gitweb_get_feature('avatar');
1127         if ($git_avatar eq 'gravatar') {
1128                 $git_avatar = '' unless (eval { require Digest::MD5; 1; });
1129         } elsif ($git_avatar eq 'picon') {
1130                 # no dependencies
1131         } else {
1132                 $git_avatar = '';
1133         }
1134 }
1135
1136 # custom error handler: 'die <message>' is Internal Server Error
1137 sub handle_errors_html {
1138         my $msg = shift; # it is already HTML escaped
1139
1140         # to avoid infinite loop where error occurs in die_error,
1141         # change handler to default handler, disabling handle_errors_html
1142         set_message("Error occurred when inside die_error:\n$msg");
1143
1144         # you cannot jump out of die_error when called as error handler;
1145         # the subroutine set via CGI::Carp::set_message is called _after_
1146         # HTTP headers are already written, so it cannot write them itself
1147         die_error(undef, undef, $msg, -error_handler => 1, -no_http_header => 1);
1148 }
1149 set_message(\&handle_errors_html);
1150
1151 # dispatch
1152 sub dispatch {
1153         if (!defined $action) {
1154                 if (defined $hash) {
1155                         $action = git_get_type($hash);
1156                         $action or die_error(404, "Object does not exist");
1157                 } elsif (defined $hash_base && defined $file_name) {
1158                         $action = git_get_type("$hash_base:$file_name");
1159                         $action or die_error(404, "File or directory does not exist");
1160                 } elsif (defined $project) {
1161                         $action = 'summary';
1162                 } else {
1163                         $action = 'project_list';
1164                 }
1165         }
1166         if (!defined($actions{$action})) {
1167                 die_error(400, "Unknown action");
1168         }
1169         if ($action !~ m/^(?:opml|project_list|project_index)$/ &&
1170             !$project) {
1171                 die_error(400, "Project needed");
1172         }
1173         $actions{$action}->();
1174 }
1175
1176 sub reset_timer {
1177         our $t0 = [ gettimeofday() ]
1178                 if defined $t0;
1179         our $number_of_git_cmds = 0;
1180 }
1181
1182 our $first_request = 1;
1183 sub run_request {
1184         reset_timer();
1185
1186         evaluate_uri();
1187         if ($first_request) {
1188                 evaluate_gitweb_config();
1189                 evaluate_git_version();
1190         }
1191         if ($per_request_config) {
1192                 if (ref($per_request_config) eq 'CODE') {
1193                         $per_request_config->();
1194                 } elsif (!$first_request) {
1195                         evaluate_gitweb_config();
1196                 }
1197         }
1198         check_loadavg();
1199
1200         # $projectroot and $projects_list might be set in gitweb config file
1201         $projects_list ||= $projectroot;
1202
1203         evaluate_query_params();
1204         evaluate_path_info();
1205         evaluate_and_validate_params();
1206         evaluate_git_dir();
1207
1208         configure_gitweb_features();
1209
1210         dispatch();
1211 }
1212
1213 our $is_last_request = sub { 1 };
1214 our ($pre_dispatch_hook, $post_dispatch_hook, $pre_listen_hook);
1215 our $CGI = 'CGI';
1216 our $cgi;
1217 sub configure_as_fcgi {
1218         require CGI::Fast;
1219         our $CGI = 'CGI::Fast';
1220
1221         my $request_number = 0;
1222         # let each child service 100 requests
1223         our $is_last_request = sub { ++$request_number > 100 };
1224 }
1225 sub evaluate_argv {
1226         my $script_name = $ENV{'SCRIPT_NAME'} || $ENV{'SCRIPT_FILENAME'} || __FILE__;
1227         configure_as_fcgi()
1228                 if $script_name =~ /\.fcgi$/;
1229
1230         return unless (@ARGV);
1231
1232         require Getopt::Long;
1233         Getopt::Long::GetOptions(
1234                 'fastcgi|fcgi|f' => \&configure_as_fcgi,
1235                 'nproc|n=i' => sub {
1236                         my ($arg, $val) = @_;
1237                         return unless eval { require FCGI::ProcManager; 1; };
1238                         my $proc_manager = FCGI::ProcManager->new({
1239                                 n_processes => $val,
1240                         });
1241                         our $pre_listen_hook    = sub { $proc_manager->pm_manage()        };
1242                         our $pre_dispatch_hook  = sub { $proc_manager->pm_pre_dispatch()  };
1243                         our $post_dispatch_hook = sub { $proc_manager->pm_post_dispatch() };
1244                 },
1245         );
1246 }
1247
1248 sub run {
1249         evaluate_argv();
1250
1251         $first_request = 1;
1252         $pre_listen_hook->()
1253                 if $pre_listen_hook;
1254
1255  REQUEST:
1256         while ($cgi = $CGI->new()) {
1257                 $pre_dispatch_hook->()
1258                         if $pre_dispatch_hook;
1259
1260                 run_request();
1261
1262                 $post_dispatch_hook->()
1263                         if $post_dispatch_hook;
1264                 $first_request = 0;
1265
1266                 last REQUEST if ($is_last_request->());
1267         }
1268
1269  DONE_GITWEB:
1270         1;
1271 }
1272
1273 run();
1274
1275 if (defined caller) {
1276         # wrapped in a subroutine processing requests,
1277         # e.g. mod_perl with ModPerl::Registry, or PSGI with Plack::App::WrapCGI
1278         return;
1279 } else {
1280         # pure CGI script, serving single request
1281         exit;
1282 }
1283
1284 ## ======================================================================
1285 ## action links
1286
1287 # possible values of extra options
1288 # -full => 0|1      - use absolute/full URL ($my_uri/$my_url as base)
1289 # -replay => 1      - start from a current view (replay with modifications)
1290 # -path_info => 0|1 - don't use/use path_info URL (if possible)
1291 # -anchor => ANCHOR - add #ANCHOR to end of URL, implies -replay if used alone
1292 sub href {
1293         my %params = @_;
1294         # default is to use -absolute url() i.e. $my_uri
1295         my $href = $params{-full} ? $my_url : $my_uri;
1296
1297         # implicit -replay, must be first of implicit params
1298         $params{-replay} = 1 if (keys %params == 1 && $params{-anchor});
1299
1300         $params{'project'} = $project unless exists $params{'project'};
1301
1302         if ($params{-replay}) {
1303                 while (my ($name, $symbol) = each %cgi_param_mapping) {
1304                         if (!exists $params{$name}) {
1305                                 $params{$name} = $input_params{$name};
1306                         }
1307                 }
1308         }
1309
1310         my $use_pathinfo = gitweb_check_feature('pathinfo');
1311         if (defined $params{'project'} &&
1312             (exists $params{-path_info} ? $params{-path_info} : $use_pathinfo)) {
1313                 # try to put as many parameters as possible in PATH_INFO:
1314                 #   - project name
1315                 #   - action
1316                 #   - hash_parent or hash_parent_base:/file_parent
1317                 #   - hash or hash_base:/filename
1318                 #   - the snapshot_format as an appropriate suffix
1319
1320                 # When the script is the root DirectoryIndex for the domain,
1321                 # $href here would be something like http://gitweb.example.com/
1322                 # Thus, we strip any trailing / from $href, to spare us double
1323                 # slashes in the final URL
1324                 $href =~ s,/$,,;
1325
1326                 # Then add the project name, if present
1327                 $href .= "/".esc_path_info($params{'project'});
1328                 delete $params{'project'};
1329
1330                 # since we destructively absorb parameters, we keep this
1331                 # boolean that remembers if we're handling a snapshot
1332                 my $is_snapshot = $params{'action'} eq 'snapshot';
1333
1334                 # Summary just uses the project path URL, any other action is
1335                 # added to the URL
1336                 if (defined $params{'action'}) {
1337                         $href .= "/".esc_path_info($params{'action'})
1338                                 unless $params{'action'} eq 'summary';
1339                         delete $params{'action'};
1340                 }
1341
1342                 # Next, we put hash_parent_base:/file_parent..hash_base:/file_name,
1343                 # stripping nonexistent or useless pieces
1344                 $href .= "/" if ($params{'hash_base'} || $params{'hash_parent_base'}
1345                         || $params{'hash_parent'} || $params{'hash'});
1346                 if (defined $params{'hash_base'}) {
1347                         if (defined $params{'hash_parent_base'}) {
1348                                 $href .= esc_path_info($params{'hash_parent_base'});
1349                                 # skip the file_parent if it's the same as the file_name
1350                                 if (defined $params{'file_parent'}) {
1351                                         if (defined $params{'file_name'} && $params{'file_parent'} eq $params{'file_name'}) {
1352                                                 delete $params{'file_parent'};
1353                                         } elsif ($params{'file_parent'} !~ /\.\./) {
1354                                                 $href .= ":/".esc_path_info($params{'file_parent'});
1355                                                 delete $params{'file_parent'};
1356                                         }
1357                                 }
1358                                 $href .= "..";
1359                                 delete $params{'hash_parent'};
1360                                 delete $params{'hash_parent_base'};
1361                         } elsif (defined $params{'hash_parent'}) {
1362                                 $href .= esc_path_info($params{'hash_parent'}). "..";
1363                                 delete $params{'hash_parent'};
1364                         }
1365
1366                         $href .= esc_path_info($params{'hash_base'});
1367                         if (defined $params{'file_name'} && $params{'file_name'} !~ /\.\./) {
1368                                 $href .= ":/".esc_path_info($params{'file_name'});
1369                                 delete $params{'file_name'};
1370                         }
1371                         delete $params{'hash'};
1372                         delete $params{'hash_base'};
1373                 } elsif (defined $params{'hash'}) {
1374                         $href .= esc_path_info($params{'hash'});
1375                         delete $params{'hash'};
1376                 }
1377
1378                 # If the action was a snapshot, we can absorb the
1379                 # snapshot_format parameter too
1380                 if ($is_snapshot) {
1381                         my $fmt = $params{'snapshot_format'};
1382                         # snapshot_format should always be defined when href()
1383                         # is called, but just in case some code forgets, we
1384                         # fall back to the default
1385                         $fmt ||= $snapshot_fmts[0];
1386                         $href .= $known_snapshot_formats{$fmt}{'suffix'};
1387                         delete $params{'snapshot_format'};
1388                 }
1389         }
1390
1391         # now encode the parameters explicitly
1392         my @result = ();
1393         for (my $i = 0; $i < @cgi_param_mapping; $i += 2) {
1394                 my ($name, $symbol) = ($cgi_param_mapping[$i], $cgi_param_mapping[$i+1]);
1395                 if (defined $params{$name}) {
1396                         if (ref($params{$name}) eq "ARRAY") {
1397                                 foreach my $par (@{$params{$name}}) {
1398                                         push @result, $symbol . "=" . esc_param($par);
1399                                 }
1400                         } else {
1401                                 push @result, $symbol . "=" . esc_param($params{$name});
1402                         }
1403                 }
1404         }
1405         $href .= "?" . join(';', @result) if scalar @result;
1406
1407         # final transformation: trailing spaces must be escaped (URI-encoded)
1408         $href =~ s/(\s+)$/CGI::escape($1)/e;
1409
1410         if ($params{-anchor}) {
1411                 $href .= "#".esc_param($params{-anchor});
1412         }
1413
1414         return $href;
1415 }
1416
1417
1418 ## ======================================================================
1419 ## validation, quoting/unquoting and escaping
1420
1421 sub validate_action {
1422         my $input = shift || return undef;
1423         return undef unless exists $actions{$input};
1424         return $input;
1425 }
1426
1427 sub validate_project {
1428         my $input = shift || return undef;
1429         if (!validate_pathname($input) ||
1430                 !(-d "$projectroot/$input") ||
1431                 !check_export_ok("$projectroot/$input") ||
1432                 ($strict_export && !project_in_list($input))) {
1433                 return undef;
1434         } else {
1435                 return $input;
1436         }
1437 }
1438
1439 sub validate_pathname {
1440         my $input = shift || return undef;
1441
1442         # no '.' or '..' as elements of path, i.e. no '.' nor '..'
1443         # at the beginning, at the end, and between slashes.
1444         # also this catches doubled slashes
1445         if ($input =~ m!(^|/)(|\.|\.\.)(/|$)!) {
1446                 return undef;
1447         }
1448         # no null characters
1449         if ($input =~ m!\0!) {
1450                 return undef;
1451         }
1452         return $input;
1453 }
1454
1455 sub validate_refname {
1456         my $input = shift || return undef;
1457
1458         # textual hashes are O.K.
1459         if ($input =~ m/^[0-9a-fA-F]{40}$/) {
1460                 return $input;
1461         }
1462         # it must be correct pathname
1463         $input = validate_pathname($input)
1464                 or return undef;
1465         # restrictions on ref name according to git-check-ref-format
1466         if ($input =~ m!(/\.|\.\.|[\000-\040\177 ~^:?*\[]|/$)!) {
1467                 return undef;
1468         }
1469         return $input;
1470 }
1471
1472 # decode sequences of octets in utf8 into Perl's internal form,
1473 # which is utf-8 with utf8 flag set if needed.  gitweb writes out
1474 # in utf-8 thanks to "binmode STDOUT, ':utf8'" at beginning
1475 sub to_utf8 {
1476         my $str = shift;
1477         return undef unless defined $str;
1478
1479         if (utf8::is_utf8($str) || utf8::decode($str)) {
1480                 return $str;
1481         } else {
1482                 return decode($fallback_encoding, $str, Encode::FB_DEFAULT);
1483         }
1484 }
1485
1486 # quote unsafe chars, but keep the slash, even when it's not
1487 # correct, but quoted slashes look too horrible in bookmarks
1488 sub esc_param {
1489         my $str = shift;
1490         return undef unless defined $str;
1491         $str =~ s/([^A-Za-z0-9\-_.~()\/:@ ]+)/CGI::escape($1)/eg;
1492         $str =~ s/ /\+/g;
1493         return $str;
1494 }
1495
1496 # the quoting rules for path_info fragment are slightly different
1497 sub esc_path_info {
1498         my $str = shift;
1499         return undef unless defined $str;
1500
1501         # path_info doesn't treat '+' as space (specially), but '?' must be escaped
1502         $str =~ s/([^A-Za-z0-9\-_.~();\/;:@&= +]+)/CGI::escape($1)/eg;
1503
1504         return $str;
1505 }
1506
1507 # quote unsafe chars in whole URL, so some characters cannot be quoted
1508 sub esc_url {
1509         my $str = shift;
1510         return undef unless defined $str;
1511         $str =~ s/([^A-Za-z0-9\-_.~();\/;?:@&= ]+)/CGI::escape($1)/eg;
1512         $str =~ s/ /\+/g;
1513         return $str;
1514 }
1515
1516 # quote unsafe characters in HTML attributes
1517 sub esc_attr {
1518
1519         # for XHTML conformance escaping '"' to '&quot;' is not enough
1520         return esc_html(@_);
1521 }
1522
1523 # replace invalid utf8 character with SUBSTITUTION sequence
1524 sub esc_html {
1525         my $str = shift;
1526         my %opts = @_;
1527
1528         return undef unless defined $str;
1529
1530         $str = to_utf8($str);
1531         $str = $cgi->escapeHTML($str);
1532         if ($opts{'-nbsp'}) {
1533                 $str =~ s/ /&nbsp;/g;
1534         }
1535         $str =~ s|([[:cntrl:]])|(($1 ne "\t") ? quot_cec($1) : $1)|eg;
1536         return $str;
1537 }
1538
1539 # quote control characters and escape filename to HTML
1540 sub esc_path {
1541         my $str = shift;
1542         my %opts = @_;
1543
1544         return undef unless defined $str;
1545
1546         $str = to_utf8($str);
1547         $str = $cgi->escapeHTML($str);
1548         if ($opts{'-nbsp'}) {
1549                 $str =~ s/ /&nbsp;/g;
1550         }
1551         $str =~ s|([[:cntrl:]])|quot_cec($1)|eg;
1552         return $str;
1553 }
1554
1555 # Sanitize for use in XHTML + application/xml+xhtm (valid XML 1.0)
1556 sub sanitize {
1557         my $str = shift;
1558
1559         return undef unless defined $str;
1560
1561         $str = to_utf8($str);
1562         $str =~ s|([[:cntrl:]])|(index("\t\n\r", $1) != -1 ? $1 : quot_cec($1))|eg;
1563         return $str;
1564 }
1565
1566 # Make control characters "printable", using character escape codes (CEC)
1567 sub quot_cec {
1568         my $cntrl = shift;
1569         my %opts = @_;
1570         my %es = ( # character escape codes, aka escape sequences
1571                 "\t" => '\t',   # tab            (HT)
1572                 "\n" => '\n',   # line feed      (LF)
1573                 "\r" => '\r',   # carrige return (CR)
1574                 "\f" => '\f',   # form feed      (FF)
1575                 "\b" => '\b',   # backspace      (BS)
1576                 "\a" => '\a',   # alarm (bell)   (BEL)
1577                 "\e" => '\e',   # escape         (ESC)
1578                 "\013" => '\v', # vertical tab   (VT)
1579                 "\000" => '\0', # nul character  (NUL)
1580         );
1581         my $chr = ( (exists $es{$cntrl})
1582                     ? $es{$cntrl}
1583                     : sprintf('\%2x', ord($cntrl)) );
1584         if ($opts{-nohtml}) {
1585                 return $chr;
1586         } else {
1587                 return "<span class=\"cntrl\">$chr</span>";
1588         }
1589 }
1590
1591 # Alternatively use unicode control pictures codepoints,
1592 # Unicode "printable representation" (PR)
1593 sub quot_upr {
1594         my $cntrl = shift;
1595         my %opts = @_;
1596
1597         my $chr = sprintf('&#%04d;', 0x2400+ord($cntrl));
1598         if ($opts{-nohtml}) {
1599                 return $chr;
1600         } else {
1601                 return "<span class=\"cntrl\">$chr</span>";
1602         }
1603 }
1604
1605 # git may return quoted and escaped filenames
1606 sub unquote {
1607         my $str = shift;
1608
1609         sub unq {
1610                 my $seq = shift;
1611                 my %es = ( # character escape codes, aka escape sequences
1612                         't' => "\t",   # tab            (HT, TAB)
1613                         'n' => "\n",   # newline        (NL)
1614                         'r' => "\r",   # return         (CR)
1615                         'f' => "\f",   # form feed      (FF)
1616                         'b' => "\b",   # backspace      (BS)
1617                         'a' => "\a",   # alarm (bell)   (BEL)
1618                         'e' => "\e",   # escape         (ESC)
1619                         'v' => "\013", # vertical tab   (VT)
1620                 );
1621
1622                 if ($seq =~ m/^[0-7]{1,3}$/) {
1623                         # octal char sequence
1624                         return chr(oct($seq));
1625                 } elsif (exists $es{$seq}) {
1626                         # C escape sequence, aka character escape code
1627                         return $es{$seq};
1628                 }
1629                 # quoted ordinary character
1630                 return $seq;
1631         }
1632
1633         if ($str =~ m/^"(.*)"$/) {
1634                 # needs unquoting
1635                 $str = $1;
1636                 $str =~ s/\\([^0-7]|[0-7]{1,3})/unq($1)/eg;
1637         }
1638         return $str;
1639 }
1640
1641 # escape tabs (convert tabs to spaces)
1642 sub untabify {
1643         my $line = shift;
1644
1645         while ((my $pos = index($line, "\t")) != -1) {
1646                 if (my $count = (8 - ($pos % 8))) {
1647                         my $spaces = ' ' x $count;
1648                         $line =~ s/\t/$spaces/;
1649                 }
1650         }
1651
1652         return $line;
1653 }
1654
1655 sub project_in_list {
1656         my $project = shift;
1657         my @list = git_get_projects_list();
1658         return @list && scalar(grep { $_->{'path'} eq $project } @list);
1659 }
1660
1661 ## ----------------------------------------------------------------------
1662 ## HTML aware string manipulation
1663
1664 # Try to chop given string on a word boundary between position
1665 # $len and $len+$add_len. If there is no word boundary there,
1666 # chop at $len+$add_len. Do not chop if chopped part plus ellipsis
1667 # (marking chopped part) would be longer than given string.
1668 sub chop_str {
1669         my $str = shift;
1670         my $len = shift;
1671         my $add_len = shift || 10;
1672         my $where = shift || 'right'; # 'left' | 'center' | 'right'
1673
1674         # Make sure perl knows it is utf8 encoded so we don't
1675         # cut in the middle of a utf8 multibyte char.
1676         $str = to_utf8($str);
1677
1678         # allow only $len chars, but don't cut a word if it would fit in $add_len
1679         # if it doesn't fit, cut it if it's still longer than the dots we would add
1680         # remove chopped character entities entirely
1681
1682         # when chopping in the middle, distribute $len into left and right part
1683         # return early if chopping wouldn't make string shorter
1684         if ($where eq 'center') {
1685                 return $str if ($len + 5 >= length($str)); # filler is length 5
1686                 $len = int($len/2);
1687         } else {
1688                 return $str if ($len + 4 >= length($str)); # filler is length 4
1689         }
1690
1691         # regexps: ending and beginning with word part up to $add_len
1692         my $endre = qr/.{$len}\w{0,$add_len}/;
1693         my $begre = qr/\w{0,$add_len}.{$len}/;
1694
1695         if ($where eq 'left') {
1696                 $str =~ m/^(.*?)($begre)$/;
1697                 my ($lead, $body) = ($1, $2);
1698                 if (length($lead) > 4) {
1699                         $lead = " ...";
1700                 }
1701                 return "$lead$body";
1702
1703         } elsif ($where eq 'center') {
1704                 $str =~ m/^($endre)(.*)$/;
1705                 my ($left, $str)  = ($1, $2);
1706                 $str =~ m/^(.*?)($begre)$/;
1707                 my ($mid, $right) = ($1, $2);
1708                 if (length($mid) > 5) {
1709                         $mid = " ... ";
1710                 }
1711                 return "$left$mid$right";
1712
1713         } else {
1714                 $str =~ m/^($endre)(.*)$/;
1715                 my $body = $1;
1716                 my $tail = $2;
1717                 if (length($tail) > 4) {
1718                         $tail = "... ";
1719                 }
1720                 return "$body$tail";
1721         }
1722 }
1723
1724 # takes the same arguments as chop_str, but also wraps a <span> around the
1725 # result with a title attribute if it does get chopped. Additionally, the
1726 # string is HTML-escaped.
1727 sub chop_and_escape_str {
1728         my ($str) = @_;
1729
1730         my $chopped = chop_str(@_);
1731         $str = to_utf8($str);
1732         if ($chopped eq $str) {
1733                 return esc_html($chopped);
1734         } else {
1735                 $str =~ s/[[:cntrl:]]/?/g;
1736                 return $cgi->span({-title=>$str}, esc_html($chopped));
1737         }
1738 }
1739
1740 # Highlight selected fragments of string, using given CSS class,
1741 # and escape HTML.  It is assumed that fragments do not overlap.
1742 # Regions are passed as list of pairs (array references).
1743 #
1744 # Example: esc_html_hl_regions("foobar", "mark", [ 0, 3 ]) returns
1745 # '<span class="mark">foo</span>bar'
1746 sub esc_html_hl_regions {
1747         my ($str, $css_class, @sel) = @_;
1748         my %opts = grep { ref($_) ne 'ARRAY' } @sel;
1749         @sel     = grep { ref($_) eq 'ARRAY' } @sel;
1750         return esc_html($str, %opts) unless @sel;
1751
1752         my $out = '';
1753         my $pos = 0;
1754
1755         for my $s (@sel) {
1756                 my ($begin, $end) = @$s;
1757
1758                 # Don't create empty <span> elements.
1759                 next if $end <= $begin;
1760
1761                 my $escaped = esc_html(substr($str, $begin, $end - $begin),
1762                                        %opts);
1763
1764                 $out .= esc_html(substr($str, $pos, $begin - $pos), %opts)
1765                         if ($begin - $pos > 0);
1766                 $out .= $cgi->span({-class => $css_class}, $escaped);
1767
1768                 $pos = $end;
1769         }
1770         $out .= esc_html(substr($str, $pos), %opts)
1771                 if ($pos < length($str));
1772
1773         return $out;
1774 }
1775
1776 # return positions of beginning and end of each match
1777 sub matchpos_list {
1778         my ($str, $regexp) = @_;
1779         return unless (defined $str && defined $regexp);
1780
1781         my @matches;
1782         while ($str =~ /$regexp/g) {
1783                 push @matches, [$-[0], $+[0]];
1784         }
1785         return @matches;
1786 }
1787
1788 # highlight match (if any), and escape HTML
1789 sub esc_html_match_hl {
1790         my ($str, $regexp) = @_;
1791         return esc_html($str) unless defined $regexp;
1792
1793         my @matches = matchpos_list($str, $regexp);
1794         return esc_html($str) unless @matches;
1795
1796         return esc_html_hl_regions($str, 'match', @matches);
1797 }
1798
1799
1800 # highlight match (if any) of shortened string, and escape HTML
1801 sub esc_html_match_hl_chopped {
1802         my ($str, $chopped, $regexp) = @_;
1803         return esc_html_match_hl($str, $regexp) unless defined $chopped;
1804
1805         my @matches = matchpos_list($str, $regexp);
1806         return esc_html($chopped) unless @matches;
1807
1808         # filter matches so that we mark chopped string
1809         my $tail = "... "; # see chop_str
1810         unless ($chopped =~ s/\Q$tail\E$//) {
1811                 $tail = '';
1812         }
1813         my $chop_len = length($chopped);
1814         my $tail_len = length($tail);
1815         my @filtered;
1816
1817         for my $m (@matches) {
1818                 if ($m->[0] > $chop_len) {
1819                         push @filtered, [ $chop_len, $chop_len + $tail_len ] if ($tail_len > 0);
1820                         last;
1821                 } elsif ($m->[1] > $chop_len) {
1822                         push @filtered, [ $m->[0], $chop_len + $tail_len ];
1823                         last;
1824                 }
1825                 push @filtered, $m;
1826         }
1827
1828         return esc_html_hl_regions($chopped . $tail, 'match', @filtered);
1829 }
1830
1831 ## ----------------------------------------------------------------------
1832 ## functions returning short strings
1833
1834 # CSS class for given age value (in seconds)
1835 sub age_class {
1836         my $age = shift;
1837
1838         if (!defined $age) {
1839                 return "noage";
1840         } elsif ($age < 60*60*2) {
1841                 return "age0";
1842         } elsif ($age < 60*60*24*2) {
1843                 return "age1";
1844         } else {
1845                 return "age2";
1846         }
1847 }
1848
1849 # convert age in seconds to "nn units ago" string
1850 sub age_string {
1851         my $age = shift;
1852         my $age_str;
1853
1854         if ($age > 60*60*24*365*2) {
1855                 $age_str = (int $age/60/60/24/365);
1856                 $age_str .= " years ago";
1857         } elsif ($age > 60*60*24*(365/12)*2) {
1858                 $age_str = int $age/60/60/24/(365/12);
1859                 $age_str .= " months ago";
1860         } elsif ($age > 60*60*24*7*2) {
1861                 $age_str = int $age/60/60/24/7;
1862                 $age_str .= " weeks ago";
1863         } elsif ($age > 60*60*24*2) {
1864                 $age_str = int $age/60/60/24;
1865                 $age_str .= " days ago";
1866         } elsif ($age > 60*60*2) {
1867                 $age_str = int $age/60/60;
1868                 $age_str .= " hours ago";
1869         } elsif ($age > 60*2) {
1870                 $age_str = int $age/60;
1871                 $age_str .= " min ago";
1872         } elsif ($age > 2) {
1873                 $age_str = int $age;
1874                 $age_str .= " sec ago";
1875         } else {
1876                 $age_str .= " right now";
1877         }
1878         return $age_str;
1879 }
1880
1881 use constant {
1882         S_IFINVALID => 0030000,
1883         S_IFGITLINK => 0160000,
1884 };
1885
1886 # submodule/subproject, a commit object reference
1887 sub S_ISGITLINK {
1888         my $mode = shift;
1889
1890         return (($mode & S_IFMT) == S_IFGITLINK)
1891 }
1892
1893 # convert file mode in octal to symbolic file mode string
1894 sub mode_str {
1895         my $mode = oct shift;
1896
1897         if (S_ISGITLINK($mode)) {
1898                 return 'm---------';
1899         } elsif (S_ISDIR($mode & S_IFMT)) {
1900                 return 'drwxr-xr-x';
1901         } elsif (S_ISLNK($mode)) {
1902                 return 'lrwxrwxrwx';
1903         } elsif (S_ISREG($mode)) {
1904                 # git cares only about the executable bit
1905                 if ($mode & S_IXUSR) {
1906                         return '-rwxr-xr-x';
1907                 } else {
1908                         return '-rw-r--r--';
1909                 };
1910         } else {
1911                 return '----------';
1912         }
1913 }
1914
1915 # convert file mode in octal to file type string
1916 sub file_type {
1917         my $mode = shift;
1918
1919         if ($mode !~ m/^[0-7]+$/) {
1920                 return $mode;
1921         } else {
1922                 $mode = oct $mode;
1923         }
1924
1925         if (S_ISGITLINK($mode)) {
1926                 return "submodule";
1927         } elsif (S_ISDIR($mode & S_IFMT)) {
1928                 return "directory";
1929         } elsif (S_ISLNK($mode)) {
1930                 return "symlink";
1931         } elsif (S_ISREG($mode)) {
1932                 return "file";
1933         } else {
1934                 return "unknown";
1935         }
1936 }
1937
1938 # convert file mode in octal to file type description string
1939 sub file_type_long {
1940         my $mode = shift;
1941
1942         if ($mode !~ m/^[0-7]+$/) {
1943                 return $mode;
1944         } else {
1945                 $mode = oct $mode;
1946         }
1947
1948         if (S_ISGITLINK($mode)) {
1949                 return "submodule";
1950         } elsif (S_ISDIR($mode & S_IFMT)) {
1951                 return "directory";
1952         } elsif (S_ISLNK($mode)) {
1953                 return "symlink";
1954         } elsif (S_ISREG($mode)) {
1955                 if ($mode & S_IXUSR) {
1956                         return "executable";
1957                 } else {
1958                         return "file";
1959                 };
1960         } else {
1961                 return "unknown";
1962         }
1963 }
1964
1965
1966 ## ----------------------------------------------------------------------
1967 ## functions returning short HTML fragments, or transforming HTML fragments
1968 ## which don't belong to other sections
1969
1970 # format line of commit message.
1971 sub format_log_line_html {
1972         my $line = shift;
1973
1974         $line = esc_html($line, -nbsp=>1);
1975         $line =~ s{\b([0-9a-fA-F]{8,40})\b}{
1976                 $cgi->a({-href => href(action=>"object", hash=>$1),
1977                                         -class => "text"}, $1);
1978         }eg;
1979
1980         return $line;
1981 }
1982
1983 # format marker of refs pointing to given object
1984
1985 # the destination action is chosen based on object type and current context:
1986 # - for annotated tags, we choose the tag view unless it's the current view
1987 #   already, in which case we go to shortlog view
1988 # - for other refs, we keep the current view if we're in history, shortlog or
1989 #   log view, and select shortlog otherwise
1990 sub format_ref_marker {
1991         my ($refs, $id) = @_;
1992         my $markers = '';
1993
1994         if (defined $refs->{$id}) {
1995                 foreach my $ref (@{$refs->{$id}}) {
1996                         # this code exploits the fact that non-lightweight tags are the
1997                         # only indirect objects, and that they are the only objects for which
1998                         # we want to use tag instead of shortlog as action
1999                         my ($type, $name) = qw();
2000                         my $indirect = ($ref =~ s/\^\{\}$//);
2001                         # e.g. tags/v2.6.11 or heads/next
2002                         if ($ref =~ m!^(.*?)s?/(.*)$!) {
2003                                 $type = $1;
2004                                 $name = $2;
2005                         } else {
2006                                 $type = "ref";
2007                                 $name = $ref;
2008                         }
2009
2010                         my $class = $type;
2011                         $class .= " indirect" if $indirect;
2012
2013                         my $dest_action = "shortlog";
2014
2015                         if ($indirect) {
2016                                 $dest_action = "tag" unless $action eq "tag";
2017                         } elsif ($action =~ /^(history|(short)?log)$/) {
2018                                 $dest_action = $action;
2019                         }
2020
2021                         my $dest = "";
2022                         $dest .= "refs/" unless $ref =~ m!^refs/!;
2023                         $dest .= $ref;
2024
2025                         my $link = $cgi->a({
2026                                 -href => href(
2027                                         action=>$dest_action,
2028                                         hash=>$dest
2029                                 )}, $name);
2030
2031                         $markers .= " <span class=\"".esc_attr($class)."\" title=\"".esc_attr($ref)."\">" .
2032                                 $link . "</span>";
2033                 }
2034         }
2035
2036         if ($markers) {
2037                 return ' <span class="refs">'. $markers . '</span>';
2038         } else {
2039                 return "";
2040         }
2041 }
2042
2043 # format, perhaps shortened and with markers, title line
2044 sub format_subject_html {
2045         my ($long, $short, $href, $extra) = @_;
2046         $extra = '' unless defined($extra);
2047
2048         if (length($short) < length($long)) {
2049                 $long =~ s/[[:cntrl:]]/?/g;
2050                 return $cgi->a({-href => $href, -class => "list subject",
2051                                 -title => to_utf8($long)},
2052                        esc_html($short)) . $extra;
2053         } else {
2054                 return $cgi->a({-href => $href, -class => "list subject"},
2055                        esc_html($long)) . $extra;
2056         }
2057 }
2058
2059 # Rather than recomputing the url for an email multiple times, we cache it
2060 # after the first hit. This gives a visible benefit in views where the avatar
2061 # for the same email is used repeatedly (e.g. shortlog).
2062 # The cache is shared by all avatar engines (currently gravatar only), which
2063 # are free to use it as preferred. Since only one avatar engine is used for any
2064 # given page, there's no risk for cache conflicts.
2065 our %avatar_cache = ();
2066
2067 # Compute the picon url for a given email, by using the picon search service over at
2068 # http://www.cs.indiana.edu/picons/search.html
2069 sub picon_url {
2070         my $email = lc shift;
2071         if (!$avatar_cache{$email}) {
2072                 my ($user, $domain) = split('@', $email);
2073                 $avatar_cache{$email} =
2074                         "//www.cs.indiana.edu/cgi-pub/kinzler/piconsearch.cgi/" .
2075                         "$domain/$user/" .
2076                         "users+domains+unknown/up/single";
2077         }
2078         return $avatar_cache{$email};
2079 }
2080
2081 # Compute the gravatar url for a given email, if it's not in the cache already.
2082 # Gravatar stores only the part of the URL before the size, since that's the
2083 # one computationally more expensive. This also allows reuse of the cache for
2084 # different sizes (for this particular engine).
2085 sub gravatar_url {
2086         my $email = lc shift;
2087         my $size = shift;
2088         $avatar_cache{$email} ||=
2089                 "//www.gravatar.com/avatar/" .
2090                         Digest::MD5::md5_hex($email) . "?s=";
2091         return $avatar_cache{$email} . $size;
2092 }
2093
2094 # Insert an avatar for the given $email at the given $size if the feature
2095 # is enabled.
2096 sub git_get_avatar {
2097         my ($email, %opts) = @_;
2098         my $pre_white  = ($opts{-pad_before} ? "&nbsp;" : "");
2099         my $post_white = ($opts{-pad_after}  ? "&nbsp;" : "");
2100         $opts{-size} ||= 'default';
2101         my $size = $avatar_size{$opts{-size}} || $avatar_size{'default'};
2102         my $url = "";
2103         if ($git_avatar eq 'gravatar') {
2104                 $url = gravatar_url($email, $size);
2105         } elsif ($git_avatar eq 'picon') {
2106                 $url = picon_url($email);
2107         }
2108         # Other providers can be added by extending the if chain, defining $url
2109         # as needed. If no variant puts something in $url, we assume avatars
2110         # are completely disabled/unavailable.
2111         if ($url) {
2112                 return $pre_white .
2113                        "<img width=\"$size\" " .
2114                             "class=\"avatar\" " .
2115                             "src=\"".esc_url($url)."\" " .
2116                             "alt=\"\" " .
2117                        "/>" . $post_white;
2118         } else {
2119                 return "";
2120         }
2121 }
2122
2123 sub format_search_author {
2124         my ($author, $searchtype, $displaytext) = @_;
2125         my $have_search = gitweb_check_feature('search');
2126
2127         if ($have_search) {
2128                 my $performed = "";
2129                 if ($searchtype eq 'author') {
2130                         $performed = "authored";
2131                 } elsif ($searchtype eq 'committer') {
2132                         $performed = "committed";
2133                 }
2134
2135                 return $cgi->a({-href => href(action=>"search", hash=>$hash,
2136                                 searchtext=>$author,
2137                                 searchtype=>$searchtype), class=>"list",
2138                                 title=>"Search for commits $performed by $author"},
2139                                 $displaytext);
2140
2141         } else {
2142                 return $displaytext;
2143         }
2144 }
2145
2146 # format the author name of the given commit with the given tag
2147 # the author name is chopped and escaped according to the other
2148 # optional parameters (see chop_str).
2149 sub format_author_html {
2150         my $tag = shift;
2151         my $co = shift;
2152         my $author = chop_and_escape_str($co->{'author_name'}, @_);
2153         return "<$tag class=\"author\">" .
2154                format_search_author($co->{'author_name'}, "author",
2155                        git_get_avatar($co->{'author_email'}, -pad_after => 1) .
2156                        $author) .
2157                "</$tag>";
2158 }
2159
2160 # format git diff header line, i.e. "diff --(git|combined|cc) ..."
2161 sub format_git_diff_header_line {
2162         my $line = shift;
2163         my $diffinfo = shift;
2164         my ($from, $to) = @_;
2165
2166         if ($diffinfo->{'nparents'}) {
2167                 # combined diff
2168                 $line =~ s!^(diff (.*?) )"?.*$!$1!;
2169                 if ($to->{'href'}) {
2170                         $line .= $cgi->a({-href => $to->{'href'}, -class => "path"},
2171                                          esc_path($to->{'file'}));
2172                 } else { # file was deleted (no href)
2173                         $line .= esc_path($to->{'file'});
2174                 }
2175         } else {
2176                 # "ordinary" diff
2177                 $line =~ s!^(diff (.*?) )"?a/.*$!$1!;
2178                 if ($from->{'href'}) {
2179                         $line .= $cgi->a({-href => $from->{'href'}, -class => "path"},
2180                                          'a/' . esc_path($from->{'file'}));
2181                 } else { # file was added (no href)
2182                         $line .= 'a/' . esc_path($from->{'file'});
2183                 }
2184                 $line .= ' ';
2185                 if ($to->{'href'}) {
2186                         $line .= $cgi->a({-href => $to->{'href'}, -class => "path"},
2187                                          'b/' . esc_path($to->{'file'}));
2188                 } else { # file was deleted
2189                         $line .= 'b/' . esc_path($to->{'file'});
2190                 }
2191         }
2192
2193         return "<div class=\"diff header\">$line</div>\n";
2194 }
2195
2196 # format extended diff header line, before patch itself
2197 sub format_extended_diff_header_line {
2198         my $line = shift;
2199         my $diffinfo = shift;
2200         my ($from, $to) = @_;
2201
2202         # match <path>
2203         if ($line =~ s!^((copy|rename) from ).*$!$1! && $from->{'href'}) {
2204                 $line .= $cgi->a({-href=>$from->{'href'}, -class=>"path"},
2205                                        esc_path($from->{'file'}));
2206         }
2207         if ($line =~ s!^((copy|rename) to ).*$!$1! && $to->{'href'}) {
2208                 $line .= $cgi->a({-href=>$to->{'href'}, -class=>"path"},
2209                                  esc_path($to->{'file'}));
2210         }
2211         # match single <mode>
2212         if ($line =~ m/\s(\d{6})$/) {
2213                 $line .= '<span class="info"> (' .
2214                          file_type_long($1) .
2215                          ')</span>';
2216         }
2217         # match <hash>
2218         if ($line =~ m/^index [0-9a-fA-F]{40},[0-9a-fA-F]{40}/) {
2219                 # can match only for combined diff
2220                 $line = 'index ';
2221                 for (my $i = 0; $i < $diffinfo->{'nparents'}; $i++) {
2222                         if ($from->{'href'}[$i]) {
2223                                 $line .= $cgi->a({-href=>$from->{'href'}[$i],
2224                                                   -class=>"hash"},
2225                                                  substr($diffinfo->{'from_id'}[$i],0,7));
2226                         } else {
2227                                 $line .= '0' x 7;
2228                         }
2229                         # separator
2230                         $line .= ',' if ($i < $diffinfo->{'nparents'} - 1);
2231                 }
2232                 $line .= '..';
2233                 if ($to->{'href'}) {
2234                         $line .= $cgi->a({-href=>$to->{'href'}, -class=>"hash"},
2235                                          substr($diffinfo->{'to_id'},0,7));
2236                 } else {
2237                         $line .= '0' x 7;
2238                 }
2239
2240         } elsif ($line =~ m/^index [0-9a-fA-F]{40}..[0-9a-fA-F]{40}/) {
2241                 # can match only for ordinary diff
2242                 my ($from_link, $to_link);
2243                 if ($from->{'href'}) {
2244                         $from_link = $cgi->a({-href=>$from->{'href'}, -class=>"hash"},
2245                                              substr($diffinfo->{'from_id'},0,7));
2246                 } else {
2247                         $from_link = '0' x 7;
2248                 }
2249                 if ($to->{'href'}) {
2250                         $to_link = $cgi->a({-href=>$to->{'href'}, -class=>"hash"},
2251                                            substr($diffinfo->{'to_id'},0,7));
2252                 } else {
2253                         $to_link = '0' x 7;
2254                 }
2255                 my ($from_id, $to_id) = ($diffinfo->{'from_id'}, $diffinfo->{'to_id'});
2256                 $line =~ s!$from_id\.\.$to_id!$from_link..$to_link!;
2257         }
2258
2259         return $line . "<br/>\n";
2260 }
2261
2262 # format from-file/to-file diff header
2263 sub format_diff_from_to_header {
2264         my ($from_line, $to_line, $diffinfo, $from, $to, @parents) = @_;
2265         my $line;
2266         my $result = '';
2267
2268         $line = $from_line;
2269         #assert($line =~ m/^---/) if DEBUG;
2270         # no extra formatting for "^--- /dev/null"
2271         if (! $diffinfo->{'nparents'}) {
2272                 # ordinary (single parent) diff
2273                 if ($line =~ m!^--- "?a/!) {
2274                         if ($from->{'href'}) {
2275                                 $line = '--- a/' .
2276                                         $cgi->a({-href=>$from->{'href'}, -class=>"path"},
2277                                                 esc_path($from->{'file'}));
2278                         } else {
2279                                 $line = '--- a/' .
2280                                         esc_path($from->{'file'});
2281                         }
2282                 }
2283                 $result .= qq!<div class="diff from_file">$line</div>\n!;
2284
2285         } else {
2286                 # combined diff (merge commit)
2287                 for (my $i = 0; $i < $diffinfo->{'nparents'}; $i++) {
2288                         if ($from->{'href'}[$i]) {
2289                                 $line = '--- ' .
2290                                         $cgi->a({-href=>href(action=>"blobdiff",
2291                                                              hash_parent=>$diffinfo->{'from_id'}[$i],
2292                                                              hash_parent_base=>$parents[$i],
2293                                                              file_parent=>$from->{'file'}[$i],
2294                                                              hash=>$diffinfo->{'to_id'},
2295                                                              hash_base=>$hash,
2296                                                              file_name=>$to->{'file'}),
2297                                                  -class=>"path",
2298                                                  -title=>"diff" . ($i+1)},
2299                                                 $i+1) .
2300                                         '/' .
2301                                         $cgi->a({-href=>$from->{'href'}[$i], -class=>"path"},
2302                                                 esc_path($from->{'file'}[$i]));
2303                         } else {
2304                                 $line = '--- /dev/null';
2305                         }
2306                         $result .= qq!<div class="diff from_file">$line</div>\n!;
2307                 }
2308         }
2309
2310         $line = $to_line;
2311         #assert($line =~ m/^\+\+\+/) if DEBUG;
2312         # no extra formatting for "^+++ /dev/null"
2313         if ($line =~ m!^\+\+\+ "?b/!) {
2314                 if ($to->{'href'}) {
2315                         $line = '+++ b/' .
2316                                 $cgi->a({-href=>$to->{'href'}, -class=>"path"},
2317                                         esc_path($to->{'file'}));
2318                 } else {
2319                         $line = '+++ b/' .
2320                                 esc_path($to->{'file'});
2321                 }
2322         }
2323         $result .= qq!<div class="diff to_file">$line</div>\n!;
2324
2325         return $result;
2326 }
2327
2328 # create note for patch simplified by combined diff
2329 sub format_diff_cc_simplified {
2330         my ($diffinfo, @parents) = @_;
2331         my $result = '';
2332
2333         $result .= "<div class=\"diff header\">" .
2334                    "diff --cc ";
2335         if (!is_deleted($diffinfo)) {
2336                 $result .= $cgi->a({-href => href(action=>"blob",
2337                                                   hash_base=>$hash,
2338                                                   hash=>$diffinfo->{'to_id'},
2339                                                   file_name=>$diffinfo->{'to_file'}),
2340                                     -class => "path"},
2341                                    esc_path($diffinfo->{'to_file'}));
2342         } else {
2343                 $result .= esc_path($diffinfo->{'to_file'});
2344         }
2345         $result .= "</div>\n" . # class="diff header"
2346                    "<div class=\"diff nodifferences\">" .
2347                    "Simple merge" .
2348                    "</div>\n"; # class="diff nodifferences"
2349
2350         return $result;
2351 }
2352
2353 sub diff_line_class {
2354         my ($line, $from, $to) = @_;
2355
2356         # ordinary diff
2357         my $num_sign = 1;
2358         # combined diff
2359         if ($from && $to && ref($from->{'href'}) eq "ARRAY") {
2360                 $num_sign = scalar @{$from->{'href'}};
2361         }
2362
2363         my @diff_line_classifier = (
2364                 { regexp => qr/^\@\@{$num_sign} /, class => "chunk_header"},
2365                 { regexp => qr/^\\/,               class => "incomplete"  },
2366                 { regexp => qr/^ {$num_sign}/,     class => "ctx" },
2367                 # classifier for context must come before classifier add/rem,
2368                 # or we would have to use more complicated regexp, for example
2369                 # qr/(?= {0,$m}\+)[+ ]{$num_sign}/, where $m = $num_sign - 1;
2370                 { regexp => qr/^[+ ]{$num_sign}/,   class => "add" },
2371                 { regexp => qr/^[- ]{$num_sign}/,   class => "rem" },
2372         );
2373         for my $clsfy (@diff_line_classifier) {
2374                 return $clsfy->{'class'}
2375                         if ($line =~ $clsfy->{'regexp'});
2376         }
2377
2378         # fallback
2379         return "";
2380 }
2381
2382 # assumes that $from and $to are defined and correctly filled,
2383 # and that $line holds a line of chunk header for unified diff
2384 sub format_unidiff_chunk_header {
2385         my ($line, $from, $to) = @_;
2386
2387         my ($from_text, $from_start, $from_lines, $to_text, $to_start, $to_lines, $section) =
2388                 $line =~ m/^\@{2} (-(\d+)(?:,(\d+))?) (\+(\d+)(?:,(\d+))?) \@{2}(.*)$/;
2389
2390         $from_lines = 0 unless defined $from_lines;
2391         $to_lines   = 0 unless defined $to_lines;
2392
2393         if ($from->{'href'}) {
2394                 $from_text = $cgi->a({-href=>"$from->{'href'}#l$from_start",
2395                                      -class=>"list"}, $from_text);
2396         }
2397         if ($to->{'href'}) {
2398                 $to_text   = $cgi->a({-href=>"$to->{'href'}#l$to_start",
2399                                      -class=>"list"}, $to_text);
2400         }
2401         $line = "<span class=\"chunk_info\">@@ $from_text $to_text @@</span>" .
2402                 "<span class=\"section\">" . esc_html($section, -nbsp=>1) . "</span>";
2403         return $line;
2404 }
2405
2406 # assumes that $from and $to are defined and correctly filled,
2407 # and that $line holds a line of chunk header for combined diff
2408 sub format_cc_diff_chunk_header {
2409         my ($line, $from, $to) = @_;
2410
2411         my ($prefix, $ranges, $section) = $line =~ m/^(\@+) (.*?) \@+(.*)$/;
2412         my (@from_text, @from_start, @from_nlines, $to_text, $to_start, $to_nlines);
2413
2414         @from_text = split(' ', $ranges);
2415         for (my $i = 0; $i < @from_text; ++$i) {
2416                 ($from_start[$i], $from_nlines[$i]) =
2417                         (split(',', substr($from_text[$i], 1)), 0);
2418         }
2419
2420         $to_text   = pop @from_text;
2421         $to_start  = pop @from_start;
2422         $to_nlines = pop @from_nlines;
2423
2424         $line = "<span class=\"chunk_info\">$prefix ";
2425         for (my $i = 0; $i < @from_text; ++$i) {
2426                 if ($from->{'href'}[$i]) {
2427                         $line .= $cgi->a({-href=>"$from->{'href'}[$i]#l$from_start[$i]",
2428                                           -class=>"list"}, $from_text[$i]);
2429                 } else {
2430                         $line .= $from_text[$i];
2431                 }
2432                 $line .= " ";
2433         }
2434         if ($to->{'href'}) {
2435                 $line .= $cgi->a({-href=>"$to->{'href'}#l$to_start",
2436                                   -class=>"list"}, $to_text);
2437         } else {
2438                 $line .= $to_text;
2439         }
2440         $line .= " $prefix</span>" .
2441                  "<span class=\"section\">" . esc_html($section, -nbsp=>1) . "</span>";
2442         return $line;
2443 }
2444
2445 # process patch (diff) line (not to be used for diff headers),
2446 # returning HTML-formatted (but not wrapped) line.
2447 # If the line is passed as a reference, it is treated as HTML and not
2448 # esc_html()'ed.
2449 sub format_diff_line {
2450         my ($line, $diff_class, $from, $to) = @_;
2451
2452         if (ref($line)) {
2453                 $line = $$line;
2454         } else {
2455                 chomp $line;
2456                 $line = untabify($line);
2457
2458                 if ($from && $to && $line =~ m/^\@{2} /) {
2459                         $line = format_unidiff_chunk_header($line, $from, $to);
2460                 } elsif ($from && $to && $line =~ m/^\@{3}/) {
2461                         $line = format_cc_diff_chunk_header($line, $from, $to);
2462                 } else {
2463                         $line = esc_html($line, -nbsp=>1);
2464                 }
2465         }
2466
2467         my $diff_classes = "diff";
2468         $diff_classes .= " $diff_class" if ($diff_class);
2469         $line = "<div class=\"$diff_classes\">$line</div>\n";
2470
2471         return $line;
2472 }
2473
2474 # Generates undef or something like "_snapshot_" or "snapshot (_tbz2_ _zip_)",
2475 # linked.  Pass the hash of the tree/commit to snapshot.
2476 sub format_snapshot_links {
2477         my ($hash) = @_;
2478         my $num_fmts = @snapshot_fmts;
2479         if ($num_fmts > 1) {
2480                 # A parenthesized list of links bearing format names.
2481                 # e.g. "snapshot (_tar.gz_ _zip_)"
2482                 return "snapshot (" . join(' ', map
2483                         $cgi->a({
2484                                 -href => href(
2485                                         action=>"snapshot",
2486                                         hash=>$hash,
2487                                         snapshot_format=>$_
2488                                 )
2489                         }, $known_snapshot_formats{$_}{'display'})
2490                 , @snapshot_fmts) . ")";
2491         } elsif ($num_fmts == 1) {
2492                 # A single "snapshot" link whose tooltip bears the format name.
2493                 # i.e. "_snapshot_"
2494                 my ($fmt) = @snapshot_fmts;
2495                 return
2496                         $cgi->a({
2497                                 -href => href(
2498                                         action=>"snapshot",
2499                                         hash=>$hash,
2500                                         snapshot_format=>$fmt
2501                                 ),
2502                                 -title => "in format: $known_snapshot_formats{$fmt}{'display'}"
2503                         }, "snapshot");
2504         } else { # $num_fmts == 0
2505                 return undef;
2506         }
2507 }
2508
2509 ## ......................................................................
2510 ## functions returning values to be passed, perhaps after some
2511 ## transformation, to other functions; e.g. returning arguments to href()
2512
2513 # returns hash to be passed to href to generate gitweb URL
2514 # in -title key it returns description of link
2515 sub get_feed_info {
2516         my $format = shift || 'Atom';
2517         my %res = (action => lc($format));
2518
2519         # feed links are possible only for project views
2520         return unless (defined $project);
2521         # some views should link to OPML, or to generic project feed,
2522         # or don't have specific feed yet (so they should use generic)
2523         return if (!$action || $action =~ /^(?:tags|heads|forks|tag|search)$/x);
2524
2525         my $branch;
2526         # branches refs uses 'refs/heads/' prefix (fullname) to differentiate
2527         # from tag links; this also makes possible to detect branch links
2528         if ((defined $hash_base && $hash_base =~ m!^refs/heads/(.*)$!) ||
2529             (defined $hash      && $hash      =~ m!^refs/heads/(.*)$!)) {
2530                 $branch = $1;
2531         }
2532         # find log type for feed description (title)
2533         my $type = 'log';
2534         if (defined $file_name) {
2535                 $type  = "history of $file_name";
2536                 $type .= "/" if ($action eq 'tree');
2537                 $type .= " on '$branch'" if (defined $branch);
2538         } else {
2539                 $type = "log of $branch" if (defined $branch);
2540         }
2541
2542         $res{-title} = $type;
2543         $res{'hash'} = (defined $branch ? "refs/heads/$branch" : undef);
2544         $res{'file_name'} = $file_name;
2545
2546         return %res;
2547 }
2548
2549 ## ----------------------------------------------------------------------
2550 ## git utility subroutines, invoking git commands
2551
2552 # returns path to the core git executable and the --git-dir parameter as list
2553 sub git_cmd {
2554         $number_of_git_cmds++;
2555         return $GIT, '--git-dir='.$git_dir;
2556 }
2557
2558 # quote the given arguments for passing them to the shell
2559 # quote_command("command", "arg 1", "arg with ' and ! characters")
2560 # => "'command' 'arg 1' 'arg with '\'' and '\!' characters'"
2561 # Try to avoid using this function wherever possible.
2562 sub quote_command {
2563         return join(' ',
2564                 map { my $a = $_; $a =~ s/(['!])/'\\$1'/g; "'$a'" } @_ );
2565 }
2566
2567 # get HEAD ref of given project as hash
2568 sub git_get_head_hash {
2569         return git_get_full_hash(shift, 'HEAD');
2570 }
2571
2572 sub git_get_full_hash {
2573         return git_get_hash(@_);
2574 }
2575
2576 sub git_get_short_hash {
2577         return git_get_hash(@_, '--short=7');
2578 }
2579
2580 sub git_get_hash {
2581         my ($project, $hash, @options) = @_;
2582         my $o_git_dir = $git_dir;
2583         my $retval = undef;
2584         $git_dir = "$projectroot/$project";
2585         if (open my $fd, '-|', git_cmd(), 'rev-parse',
2586             '--verify', '-q', @options, $hash) {
2587                 $retval = <$fd>;
2588                 chomp $retval if defined $retval;
2589                 close $fd;
2590         }
2591         if (defined $o_git_dir) {
2592                 $git_dir = $o_git_dir;
2593         }
2594         return $retval;
2595 }
2596
2597 # get type of given object
2598 sub git_get_type {
2599         my $hash = shift;
2600
2601         open my $fd, "-|", git_cmd(), "cat-file", '-t', $hash or return;
2602         my $type = <$fd>;
2603         close $fd or return;
2604         chomp $type;
2605         return $type;
2606 }
2607
2608 # repository configuration
2609 our $config_file = '';
2610 our %config;
2611
2612 # store multiple values for single key as anonymous array reference
2613 # single values stored directly in the hash, not as [ <value> ]
2614 sub hash_set_multi {
2615         my ($hash, $key, $value) = @_;
2616
2617         if (!exists $hash->{$key}) {
2618                 $hash->{$key} = $value;
2619         } elsif (!ref $hash->{$key}) {
2620                 $hash->{$key} = [ $hash->{$key}, $value ];
2621         } else {
2622                 push @{$hash->{$key}}, $value;
2623         }
2624 }
2625
2626 # return hash of git project configuration
2627 # optionally limited to some section, e.g. 'gitweb'
2628 sub git_parse_project_config {
2629         my $section_regexp = shift;
2630         my %config;
2631
2632         local $/ = "\0";
2633
2634         open my $fh, "-|", git_cmd(), "config", '-z', '-l',
2635                 or return;
2636
2637         while (my $keyval = <$fh>) {
2638                 chomp $keyval;
2639                 my ($key, $value) = split(/\n/, $keyval, 2);
2640
2641                 hash_set_multi(\%config, $key, $value)
2642                         if (!defined $section_regexp || $key =~ /^(?:$section_regexp)\./o);
2643         }
2644         close $fh;
2645
2646         return %config;
2647 }
2648
2649 # convert config value to boolean: 'true' or 'false'
2650 # no value, number > 0, 'true' and 'yes' values are true
2651 # rest of values are treated as false (never as error)
2652 sub config_to_bool {
2653         my $val = shift;
2654
2655         return 1 if !defined $val;             # section.key
2656
2657         # strip leading and trailing whitespace
2658         $val =~ s/^\s+//;
2659         $val =~ s/\s+$//;
2660
2661         return (($val =~ /^\d+$/ && $val) ||   # section.key = 1
2662                 ($val =~ /^(?:true|yes)$/i));  # section.key = true
2663 }
2664
2665 # convert config value to simple decimal number
2666 # an optional value suffix of 'k', 'm', or 'g' will cause the value
2667 # to be multiplied by 1024, 1048576, or 1073741824
2668 sub config_to_int {
2669         my $val = shift;
2670
2671         # strip leading and trailing whitespace
2672         $val =~ s/^\s+//;
2673         $val =~ s/\s+$//;
2674
2675         if (my ($num, $unit) = ($val =~ /^([0-9]*)([kmg])$/i)) {
2676                 $unit = lc($unit);
2677                 # unknown unit is treated as 1
2678                 return $num * ($unit eq 'g' ? 1073741824 :
2679                                $unit eq 'm' ?    1048576 :
2680                                $unit eq 'k' ?       1024 : 1);
2681         }
2682         return $val;
2683 }
2684
2685 # convert config value to array reference, if needed
2686 sub config_to_multi {
2687         my $val = shift;
2688
2689         return ref($val) ? $val : (defined($val) ? [ $val ] : []);
2690 }
2691
2692 sub git_get_project_config {
2693         my ($key, $type) = @_;
2694
2695         return unless defined $git_dir;
2696
2697         # key sanity check
2698         return unless ($key);
2699         # only subsection, if exists, is case sensitive,
2700         # and not lowercased by 'git config -z -l'
2701         if (my ($hi, $mi, $lo) = ($key =~ /^([^.]*)\.(.*)\.([^.]*)$/)) {
2702                 $lo =~ s/_//g;
2703                 $key = join(".", lc($hi), $mi, lc($lo));
2704                 return if ($lo =~ /\W/ || $hi =~ /\W/);
2705         } else {
2706                 $key = lc($key);
2707                 $key =~ s/_//g;
2708                 return if ($key =~ /\W/);
2709         }
2710         $key =~ s/^gitweb\.//;
2711
2712         # type sanity check
2713         if (defined $type) {
2714                 $type =~ s/^--//;
2715                 $type = undef
2716                         unless ($type eq 'bool' || $type eq 'int');
2717         }
2718
2719         # get config
2720         if (!defined $config_file ||
2721             $config_file ne "$git_dir/config") {
2722                 %config = git_parse_project_config('gitweb');
2723                 $config_file = "$git_dir/config";
2724         }
2725
2726         # check if config variable (key) exists
2727         return unless exists $config{"gitweb.$key"};
2728
2729         # ensure given type
2730         if (!defined $type) {
2731                 return $config{"gitweb.$key"};
2732         } elsif ($type eq 'bool') {
2733                 # backward compatibility: 'git config --bool' returns true/false
2734                 return config_to_bool($config{"gitweb.$key"}) ? 'true' : 'false';
2735         } elsif ($type eq 'int') {
2736                 return config_to_int($config{"gitweb.$key"});
2737         }
2738         return $config{"gitweb.$key"};
2739 }
2740
2741 # get hash of given path at given ref
2742 sub git_get_hash_by_path {
2743         my $base = shift;
2744         my $path = shift || return undef;
2745         my $type = shift;
2746
2747         $path =~ s,/+$,,;
2748
2749         open my $fd, "-|", git_cmd(), "ls-tree", $base, "--", $path
2750                 or die_error(500, "Open git-ls-tree failed");
2751         my $line = <$fd>;
2752         close $fd or return undef;
2753
2754         if (!defined $line) {
2755                 # there is no tree or hash given by $path at $base
2756                 return undef;
2757         }
2758
2759         #'100644 blob 0fa3f3a66fb6a137f6ec2c19351ed4d807070ffa  panic.c'
2760         $line =~ m/^([0-9]+) (.+) ([0-9a-fA-F]{40})\t/;
2761         if (defined $type && $type ne $2) {
2762                 # type doesn't match
2763                 return undef;
2764         }
2765         return $3;
2766 }
2767
2768 # get path of entry with given hash at given tree-ish (ref)
2769 # used to get 'from' filename for combined diff (merge commit) for renames
2770 sub git_get_path_by_hash {
2771         my $base = shift || return;
2772         my $hash = shift || return;
2773
2774         local $/ = "\0";
2775
2776         open my $fd, "-|", git_cmd(), "ls-tree", '-r', '-t', '-z', $base
2777                 or return undef;
2778         while (my $line = <$fd>) {
2779                 chomp $line;
2780
2781                 #'040000 tree 595596a6a9117ddba9fe379b6b012b558bac8423  gitweb'
2782                 #'100644 blob e02e90f0429be0d2a69b76571101f20b8f75530f  gitweb/README'
2783                 if ($line =~ m/(?:[0-9]+) (?:.+) $hash\t(.+)$/) {
2784                         close $fd;
2785                         return $1;
2786                 }
2787         }
2788         close $fd;
2789         return undef;
2790 }
2791
2792 ## ......................................................................
2793 ## git utility functions, directly accessing git repository
2794
2795 # get the value of config variable either from file named as the variable
2796 # itself in the repository ($GIT_DIR/$name file), or from gitweb.$name
2797 # configuration variable in the repository config file.
2798 sub git_get_file_or_project_config {
2799         my ($path, $name) = @_;
2800
2801         $git_dir = "$projectroot/$path";
2802         open my $fd, '<', "$git_dir/$name"
2803                 or return git_get_project_config($name);
2804         my $conf = <$fd>;
2805         close $fd;
2806         if (defined $conf) {
2807                 chomp $conf;
2808         }
2809         return $conf;
2810 }
2811
2812 sub git_get_project_description {
2813         my $path = shift;
2814         return git_get_file_or_project_config($path, 'description');
2815 }
2816
2817 sub git_get_project_category {
2818         my $path = shift;
2819         return git_get_file_or_project_config($path, 'category');
2820 }
2821
2822
2823 # supported formats:
2824 # * $GIT_DIR/ctags/<tagname> file (in 'ctags' subdirectory)
2825 #   - if its contents is a number, use it as tag weight,
2826 #   - otherwise add a tag with weight 1
2827 # * $GIT_DIR/ctags file, each line is a tag (with weight 1)
2828 #   the same value multiple times increases tag weight
2829 # * `gitweb.ctag' multi-valued repo config variable
2830 sub git_get_project_ctags {
2831         my $project = shift;
2832         my $ctags = {};
2833
2834         $git_dir = "$projectroot/$project";
2835         if (opendir my $dh, "$git_dir/ctags") {
2836                 my @files = grep { -f $_ } map { "$git_dir/ctags/$_" } readdir($dh);
2837                 foreach my $tagfile (@files) {
2838                         open my $ct, '<', $tagfile
2839                                 or next;
2840                         my $val = <$ct>;
2841                         chomp $val if $val;
2842                         close $ct;
2843
2844                         (my $ctag = $tagfile) =~ s#.*/##;
2845                         if ($val =~ /^\d+$/) {
2846                                 $ctags->{$ctag} = $val;
2847                         } else {
2848                                 $ctags->{$ctag} = 1;
2849                         }
2850                 }
2851                 closedir $dh;
2852
2853         } elsif (open my $fh, '<', "$git_dir/ctags") {
2854                 while (my $line = <$fh>) {
2855                         chomp $line;
2856                         $ctags->{$line}++ if $line;
2857                 }
2858                 close $fh;
2859
2860         } else {
2861                 my $taglist = config_to_multi(git_get_project_config('ctag'));
2862                 foreach my $tag (@$taglist) {
2863                         $ctags->{$tag}++;
2864                 }
2865         }
2866
2867         return $ctags;
2868 }
2869
2870 # return hash, where keys are content tags ('ctags'),
2871 # and values are sum of weights of given tag in every project
2872 sub git_gather_all_ctags {
2873         my $projects = shift;
2874         my $ctags = {};
2875
2876         foreach my $p (@$projects) {
2877                 foreach my $ct (keys %{$p->{'ctags'}}) {
2878                         $ctags->{$ct} += $p->{'ctags'}->{$ct};
2879                 }
2880         }
2881
2882         return $ctags;
2883 }
2884
2885 sub git_populate_project_tagcloud {
2886         my $ctags = shift;
2887
2888         # First, merge different-cased tags; tags vote on casing
2889         my %ctags_lc;
2890         foreach (keys %$ctags) {
2891                 $ctags_lc{lc $_}->{count} += $ctags->{$_};
2892                 if (not $ctags_lc{lc $_}->{topcount}
2893                     or $ctags_lc{lc $_}->{topcount} < $ctags->{$_}) {
2894                         $ctags_lc{lc $_}->{topcount} = $ctags->{$_};
2895                         $ctags_lc{lc $_}->{topname} = $_;
2896                 }
2897         }
2898
2899         my $cloud;
2900         my $matched = $input_params{'ctag'};
2901         if (eval { require HTML::TagCloud; 1; }) {
2902                 $cloud = HTML::TagCloud->new;
2903                 foreach my $ctag (sort keys %ctags_lc) {
2904                         # Pad the title with spaces so that the cloud looks
2905                         # less crammed.
2906                         my $title = esc_html($ctags_lc{$ctag}->{topname});
2907                         $title =~ s/ /&nbsp;/g;
2908                         $title =~ s/^/&nbsp;/g;
2909                         $title =~ s/$/&nbsp;/g;
2910                         if (defined $matched && $matched eq $ctag) {
2911                                 $title = qq(<span class="match">$title</span>);
2912                         }
2913                         $cloud->add($title, href(project=>undef, ctag=>$ctag),
2914                                     $ctags_lc{$ctag}->{count});
2915                 }
2916         } else {
2917                 $cloud = {};
2918                 foreach my $ctag (keys %ctags_lc) {
2919                         my $title = esc_html($ctags_lc{$ctag}->{topname}, -nbsp=>1);
2920                         if (defined $matched && $matched eq $ctag) {
2921                                 $title = qq(<span class="match">$title</span>);
2922                         }
2923                         $cloud->{$ctag}{count} = $ctags_lc{$ctag}->{count};
2924                         $cloud->{$ctag}{ctag} =
2925                                 $cgi->a({-href=>href(project=>undef, ctag=>$ctag)}, $title);
2926                 }
2927         }
2928         return $cloud;
2929 }
2930
2931 sub git_show_project_tagcloud {
2932         my ($cloud, $count) = @_;
2933         if (ref $cloud eq 'HTML::TagCloud') {
2934                 return $cloud->html_and_css($count);
2935         } else {
2936                 my @tags = sort { $cloud->{$a}->{'count'} <=> $cloud->{$b}->{'count'} } keys %$cloud;
2937                 return
2938                         '<div id="htmltagcloud"'.($project ? '' : ' align="center"').'>' .
2939                         join (', ', map {
2940                                 $cloud->{$_}->{'ctag'}
2941                         } splice(@tags, 0, $count)) .
2942                         '</div>';
2943         }
2944 }
2945
2946 sub git_get_project_url_list {
2947         my $path = shift;
2948
2949         $git_dir = "$projectroot/$path";
2950         open my $fd, '<', "$git_dir/cloneurl"
2951                 or return wantarray ?
2952                 @{ config_to_multi(git_get_project_config('url')) } :
2953                    config_to_multi(git_get_project_config('url'));
2954         my @git_project_url_list = map { chomp; $_ } <$fd>;
2955         close $fd;
2956
2957         return wantarray ? @git_project_url_list : \@git_project_url_list;
2958 }
2959
2960 sub git_get_projects_list {
2961         my $filter = shift || '';
2962         my $paranoid = shift;
2963         my @list;
2964
2965         if (-d $projects_list) {
2966                 # search in directory
2967                 my $dir = $projects_list;
2968                 # remove the trailing "/"
2969                 $dir =~ s!/+$!!;
2970                 my $pfxlen = length("$dir");
2971                 my $pfxdepth = ($dir =~ tr!/!!);
2972                 # when filtering, search only given subdirectory
2973                 if ($filter && !$paranoid) {
2974                         $dir .= "/$filter";
2975                         $dir =~ s!/+$!!;
2976                 }
2977
2978                 File::Find::find({
2979                         follow_fast => 1, # follow symbolic links
2980                         follow_skip => 2, # ignore duplicates
2981                         dangling_symlinks => 0, # ignore dangling symlinks, silently
2982                         wanted => sub {
2983                                 # global variables
2984                                 our $project_maxdepth;
2985                                 our $projectroot;
2986                                 # skip project-list toplevel, if we get it.
2987                                 return if (m!^[/.]$!);
2988                                 # only directories can be git repositories
2989                                 return unless (-d $_);
2990                                 # don't traverse too deep (Find is super slow on os x)
2991                                 # $project_maxdepth excludes depth of $projectroot
2992                                 if (($File::Find::name =~ tr!/!!) - $pfxdepth > $project_maxdepth) {
2993                                         $File::Find::prune = 1;
2994                                         return;
2995                                 }
2996
2997                                 my $path = substr($File::Find::name, $pfxlen + 1);
2998                                 # paranoidly only filter here
2999                                 if ($paranoid && $filter && $path !~ m!^\Q$filter\E/!) {
3000                                         next;
3001                                 }
3002                                 # we check related file in $projectroot
3003                                 if (check_export_ok("$projectroot/$path")) {
3004                                         push @list, { path => $path };
3005                                         $File::Find::prune = 1;
3006                                 }
3007                         },
3008                 }, "$dir");
3009
3010         } elsif (-f $projects_list) {
3011                 # read from file(url-encoded):
3012                 # 'git%2Fgit.git Linus+Torvalds'
3013                 # 'libs%2Fklibc%2Fklibc.git H.+Peter+Anvin'
3014                 # 'linux%2Fhotplug%2Fudev.git Greg+Kroah-Hartman'
3015                 open my $fd, '<', $projects_list or return;
3016         PROJECT:
3017                 while (my $line = <$fd>) {
3018                         chomp $line;
3019                         my ($path, $owner) = split ' ', $line;
3020                         $path = unescape($path);
3021                         $owner = unescape($owner);
3022                         if (!defined $path) {
3023                                 next;
3024                         }
3025                         # if $filter is rpovided, check if $path begins with $filter
3026                         if ($filter && $path !~ m!^\Q$filter\E/!) {
3027                                 next;
3028                         }
3029                         if (check_export_ok("$projectroot/$path")) {
3030                                 my $pr = {
3031                                         path => $path
3032                                 };
3033                                 if ($owner) {
3034                                         $pr->{'owner'} = to_utf8($owner);
3035                                 }
3036                                 push @list, $pr;
3037                         }
3038                 }
3039                 close $fd;
3040         }
3041         return @list;
3042 }
3043
3044 # written with help of Tree::Trie module (Perl Artistic License, GPL compatibile)
3045 # as side effects it sets 'forks' field to list of forks for forked projects
3046 sub filter_forks_from_projects_list {
3047         my $projects = shift;
3048
3049         my %trie; # prefix tree of directories (path components)
3050         # generate trie out of those directories that might contain forks
3051         foreach my $pr (@$projects) {
3052                 my $path = $pr->{'path'};
3053                 $path =~ s/\.git$//;      # forks of 'repo.git' are in 'repo/' directory
3054                 next if ($path =~ m!/$!); # skip non-bare repositories, e.g. 'repo/.git'
3055                 next unless ($path);      # skip '.git' repository: tests, git-instaweb
3056                 next unless (-d "$projectroot/$path"); # containing directory exists
3057                 $pr->{'forks'} = [];      # there can be 0 or more forks of project
3058
3059                 # add to trie
3060                 my @dirs = split('/', $path);
3061                 # walk the trie, until either runs out of components or out of trie
3062                 my $ref = \%trie;
3063                 while (scalar @dirs &&
3064                        exists($ref->{$dirs[0]})) {
3065                         $ref = $ref->{shift @dirs};
3066                 }
3067                 # create rest of trie structure from rest of components
3068                 foreach my $dir (@dirs) {
3069                         $ref = $ref->{$dir} = {};
3070                 }
3071                 # create end marker, store $pr as a data
3072                 $ref->{''} = $pr if (!exists $ref->{''});
3073         }
3074
3075         # filter out forks, by finding shortest prefix match for paths
3076         my @filtered;
3077  PROJECT:
3078         foreach my $pr (@$projects) {
3079                 # trie lookup
3080                 my $ref = \%trie;
3081         DIR:
3082                 foreach my $dir (split('/', $pr->{'path'})) {
3083                         if (exists $ref->{''}) {
3084                                 # found [shortest] prefix, is a fork - skip it
3085                                 push @{$ref->{''}{'forks'}}, $pr;
3086                                 next PROJECT;
3087                         }
3088                         if (!exists $ref->{$dir}) {
3089                                 # not in trie, cannot have prefix, not a fork
3090                                 push @filtered, $pr;
3091                                 next PROJECT;
3092                         }
3093                         # If the dir is there, we just walk one step down the trie.
3094                         $ref = $ref->{$dir};
3095                 }
3096                 # we ran out of trie
3097                 # (shouldn't happen: it's either no match, or end marker)
3098                 push @filtered, $pr;
3099         }
3100
3101         return @filtered;
3102 }
3103
3104 # note: fill_project_list_info must be run first,
3105 # for 'descr_long' and 'ctags' to be filled
3106 sub search_projects_list {
3107         my ($projlist, %opts) = @_;
3108         my $tagfilter  = $opts{'tagfilter'};
3109         my $search_re = $opts{'search_regexp'};
3110
3111         return @$projlist
3112                 unless ($tagfilter || $search_re);
3113
3114         # searching projects require filling to be run before it;
3115         fill_project_list_info($projlist,
3116                                $tagfilter  ? 'ctags' : (),
3117                                $search_re ? ('path', 'descr') : ());
3118         my @projects;
3119  PROJECT:
3120         foreach my $pr (@$projlist) {
3121
3122                 if ($tagfilter) {
3123                         next unless ref($pr->{'ctags'}) eq 'HASH';
3124                         next unless
3125                                 grep { lc($_) eq lc($tagfilter) } keys %{$pr->{'ctags'}};
3126                 }
3127
3128                 if ($search_re) {
3129                         next unless
3130                                 $pr->{'path'} =~ /$search_re/ ||
3131                                 $pr->{'descr_long'} =~ /$search_re/;
3132                 }
3133
3134                 push @projects, $pr;
3135         }
3136
3137         return @projects;
3138 }
3139
3140 our $gitweb_project_owner = undef;
3141 sub git_get_project_list_from_file {
3142
3143         return if (defined $gitweb_project_owner);
3144
3145         $gitweb_project_owner = {};
3146         # read from file (url-encoded):
3147         # 'git%2Fgit.git Linus+Torvalds'
3148         # 'libs%2Fklibc%2Fklibc.git H.+Peter+Anvin'
3149         # 'linux%2Fhotplug%2Fudev.git Greg+Kroah-Hartman'
3150         if (-f $projects_list) {
3151                 open(my $fd, '<', $projects_list);
3152                 while (my $line = <$fd>) {
3153                         chomp $line;
3154                         my ($pr, $ow) = split ' ', $line;
3155                         $pr = unescape($pr);
3156                         $ow = unescape($ow);
3157                         $gitweb_project_owner->{$pr} = to_utf8($ow);
3158                 }
3159                 close $fd;
3160         }
3161 }
3162
3163 sub git_get_project_owner {
3164         my $project = shift;
3165         my $owner;
3166
3167         return undef unless $project;
3168         $git_dir = "$projectroot/$project";
3169
3170         if (!defined $gitweb_project_owner) {
3171                 git_get_project_list_from_file();
3172         }
3173
3174         if (exists $gitweb_project_owner->{$project}) {
3175                 $owner = $gitweb_project_owner->{$project};
3176         }
3177         if (!defined $owner){
3178                 $owner = git_get_project_config('owner');
3179         }
3180         if (!defined $owner) {
3181                 $owner = get_file_owner("$git_dir");
3182         }
3183
3184         return $owner;
3185 }
3186
3187 sub git_get_last_activity {
3188         my ($path) = @_;
3189         my $fd;
3190
3191         $git_dir = "$projectroot/$path";
3192         open($fd, "-|", git_cmd(), 'for-each-ref',
3193              '--format=%(committer)',
3194              '--sort=-committerdate',
3195              '--count=1',
3196              'refs/heads') or return;
3197         my $most_recent = <$fd>;
3198         close $fd or return;
3199         if (defined $most_recent &&
3200             $most_recent =~ / (\d+) [-+][01]\d\d\d$/) {
3201                 my $timestamp = $1;
3202                 my $age = time - $timestamp;
3203                 return ($age, age_string($age));
3204         }
3205         return (undef, undef);
3206 }
3207
3208 # Implementation note: when a single remote is wanted, we cannot use 'git
3209 # remote show -n' because that command always work (assuming it's a remote URL
3210 # if it's not defined), and we cannot use 'git remote show' because that would
3211 # try to make a network roundtrip. So the only way to find if that particular
3212 # remote is defined is to walk the list provided by 'git remote -v' and stop if
3213 # and when we find what we want.
3214 sub git_get_remotes_list {
3215         my $wanted = shift;
3216         my %remotes = ();
3217
3218         open my $fd, '-|' , git_cmd(), 'remote', '-v';
3219         return unless $fd;
3220         while (my $remote = <$fd>) {
3221                 chomp $remote;
3222                 $remote =~ s!\t(.*?)\s+\((\w+)\)$!!;
3223                 next if $wanted and not $remote eq $wanted;
3224                 my ($url, $key) = ($1, $2);
3225
3226                 $remotes{$remote} ||= { 'heads' => () };
3227                 $remotes{$remote}{$key} = $url;
3228         }
3229         close $fd or return;
3230         return wantarray ? %remotes : \%remotes;
3231 }
3232
3233 # Takes a hash of remotes as first parameter and fills it by adding the
3234 # available remote heads for each of the indicated remotes.
3235 sub fill_remote_heads {
3236         my $remotes = shift;
3237         my @heads = map { "remotes/$_" } keys %$remotes;
3238         my @remoteheads = git_get_heads_list(undef, @heads);
3239         foreach my $remote (keys %$remotes) {
3240                 $remotes->{$remote}{'heads'} = [ grep {
3241                         $_->{'name'} =~ s!^$remote/!!
3242                         } @remoteheads ];
3243         }
3244 }
3245
3246 sub git_get_references {
3247         my $type = shift || "";
3248         my %refs;
3249         # 5dc01c595e6c6ec9ccda4f6f69c131c0dd945f8c refs/tags/v2.6.11
3250         # c39ae07f393806ccf406ef966e9a15afc43cc36a refs/tags/v2.6.11^{}
3251         open my $fd, "-|", git_cmd(), "show-ref", "--dereference",
3252                 ($type ? ("--", "refs/$type") : ()) # use -- <pattern> if $type
3253                 or return;
3254
3255         while (my $line = <$fd>) {
3256                 chomp $line;
3257                 if ($line =~ m!^([0-9a-fA-F]{40})\srefs/($type.*)$!) {
3258                         if (defined $refs{$1}) {
3259                                 push @{$refs{$1}}, $2;
3260                         } else {
3261                                 $refs{$1} = [ $2 ];
3262                         }
3263                 }
3264         }
3265         close $fd or return;
3266         return \%refs;
3267 }
3268
3269 sub git_get_rev_name_tags {
3270         my $hash = shift || return undef;
3271
3272         open my $fd, "-|", git_cmd(), "name-rev", "--tags", $hash
3273                 or return;
3274         my $name_rev = <$fd>;
3275         close $fd;
3276
3277         if ($name_rev =~ m|^$hash tags/(.*)$|) {
3278                 return $1;
3279         } else {
3280                 # catches also '$hash undefined' output
3281                 return undef;
3282         }
3283 }
3284
3285 ## ----------------------------------------------------------------------
3286 ## parse to hash functions
3287
3288 sub parse_date {
3289         my $epoch = shift;
3290         my $tz = shift || "-0000";
3291
3292         my %date;
3293         my @months = ("Jan", "Feb", "Mar", "Apr", "May", "Jun", "Jul", "Aug", "Sep", "Oct", "Nov", "Dec");
3294         my @days = ("Sun", "Mon", "Tue", "Wed", "Thu", "Fri", "Sat");
3295         my ($sec, $min, $hour, $mday, $mon, $year, $wday, $yday) = gmtime($epoch);
3296         $date{'hour'} = $hour;
3297         $date{'minute'} = $min;
3298         $date{'mday'} = $mday;
3299         $date{'day'} = $days[$wday];
3300         $date{'month'} = $months[$mon];
3301         $date{'rfc2822'}   = sprintf "%s, %d %s %4d %02d:%02d:%02d +0000",
3302                              $days[$wday], $mday, $months[$mon], 1900+$year, $hour ,$min, $sec;
3303         $date{'mday-time'} = sprintf "%d %s %02d:%02d",
3304                              $mday, $months[$mon], $hour ,$min;
3305         $date{'iso-8601'}  = sprintf "%04d-%02d-%02dT%02d:%02d:%02dZ",
3306                              1900+$year, 1+$mon, $mday, $hour ,$min, $sec;
3307
3308         my ($tz_sign, $tz_hour, $tz_min) =
3309                 ($tz =~ m/^([-+])(\d\d)(\d\d)$/);
3310         $tz_sign = ($tz_sign eq '-' ? -1 : +1);
3311         my $local = $epoch + $tz_sign*((($tz_hour*60) + $tz_min)*60);
3312         ($sec, $min, $hour, $mday, $mon, $year, $wday, $yday) = gmtime($local);
3313         $date{'hour_local'} = $hour;
3314         $date{'minute_local'} = $min;
3315         $date{'tz_local'} = $tz;
3316         $date{'iso-tz'} = sprintf("%04d-%02d-%02d %02d:%02d:%02d %s",
3317                                   1900+$year, $mon+1, $mday,
3318                                   $hour, $min, $sec, $tz);
3319         return %date;
3320 }
3321
3322 sub parse_tag {
3323         my $tag_id = shift;
3324         my %tag;
3325         my @comment;
3326
3327         open my $fd, "-|", git_cmd(), "cat-file", "tag", $tag_id or return;
3328         $tag{'id'} = $tag_id;
3329         while (my $line = <$fd>) {
3330                 chomp $line;
3331                 if ($line =~ m/^object ([0-9a-fA-F]{40})$/) {
3332                         $tag{'object'} = $1;
3333                 } elsif ($line =~ m/^type (.+)$/) {
3334                         $tag{'type'} = $1;
3335                 } elsif ($line =~ m/^tag (.+)$/) {
3336                         $tag{'name'} = $1;
3337                 } elsif ($line =~ m/^tagger (.*) ([0-9]+) (.*)$/) {
3338                         $tag{'author'} = $1;
3339                         $tag{'author_epoch'} = $2;
3340                         $tag{'author_tz'} = $3;
3341                         if ($tag{'author'} =~ m/^([^<]+) <([^>]*)>/) {
3342                                 $tag{'author_name'}  = $1;
3343                                 $tag{'author_email'} = $2;
3344                         } else {
3345                                 $tag{'author_name'} = $tag{'author'};
3346                         }
3347                 } elsif ($line =~ m/--BEGIN/) {
3348                         push @comment, $line;
3349                         last;
3350                 } elsif ($line eq "") {
3351                         last;
3352                 }
3353         }
3354         push @comment, <$fd>;
3355         $tag{'comment'} = \@comment;
3356         close $fd or return;
3357         if (!defined $tag{'name'}) {
3358                 return
3359         };
3360         return %tag
3361 }
3362
3363 sub parse_commit_text {
3364         my ($commit_text, $withparents) = @_;
3365         my @commit_lines = split '\n', $commit_text;
3366         my %co;
3367
3368         pop @commit_lines; # Remove '\0'
3369
3370         if (! @commit_lines) {
3371                 return;
3372         }
3373
3374         my $header = shift @commit_lines;
3375         if ($header !~ m/^[0-9a-fA-F]{40}/) {
3376                 return;
3377         }
3378         ($co{'id'}, my @parents) = split ' ', $header;
3379         while (my $line = shift @commit_lines) {
3380                 last if $line eq "\n";
3381                 if ($line =~ m/^tree ([0-9a-fA-F]{40})$/) {
3382                         $co{'tree'} = $1;
3383                 } elsif ((!defined $withparents) && ($line =~ m/^parent ([0-9a-fA-F]{40})$/)) {
3384                         push @parents, $1;
3385                 } elsif ($line =~ m/^author (.*) ([0-9]+) (.*)$/) {
3386                         $co{'author'} = to_utf8($1);
3387                         $co{'author_epoch'} = $2;
3388                         $co{'author_tz'} = $3;
3389                         if ($co{'author'} =~ m/^([^<]+) <([^>]*)>/) {
3390                                 $co{'author_name'}  = $1;
3391                                 $co{'author_email'} = $2;
3392                         } else {
3393                                 $co{'author_name'} = $co{'author'};
3394                         }
3395                 } elsif ($line =~ m/^committer (.*) ([0-9]+) (.*)$/) {
3396                         $co{'committer'} = to_utf8($1);
3397                         $co{'committer_epoch'} = $2;
3398                         $co{'committer_tz'} = $3;
3399                         if ($co{'committer'} =~ m/^([^<]+) <([^>]*)>/) {
3400                                 $co{'committer_name'}  = $1;
3401                                 $co{'committer_email'} = $2;
3402                         } else {
3403                                 $co{'committer_name'} = $co{'committer'};
3404                         }
3405                 }
3406         }
3407         if (!defined $co{'tree'}) {
3408                 return;
3409         };
3410         $co{'parents'} = \@parents;
3411         $co{'parent'} = $parents[0];
3412
3413         foreach my $title (@commit_lines) {
3414                 $title =~ s/^    //;
3415                 if ($title ne "") {
3416                         $co{'title'} = chop_str($title, 80, 5);
3417                         # remove leading stuff of merges to make the interesting part visible
3418                         if (length($title) > 50) {
3419                                 $title =~ s/^Automatic //;
3420                                 $title =~ s/^merge (of|with) /Merge ... /i;
3421                                 if (length($title) > 50) {
3422                                         $title =~ s/(http|rsync):\/\///;
3423                                 }
3424                                 if (length($title) > 50) {
3425                                         $title =~ s/(master|www|rsync)\.//;
3426                                 }
3427                                 if (length($title) > 50) {
3428                                         $title =~ s/kernel.org:?//;
3429                                 }
3430                                 if (length($title) > 50) {
3431                                         $title =~ s/\/pub\/scm//;
3432                                 }
3433                         }
3434                         $co{'title_short'} = chop_str($title, 50, 5);
3435                         last;
3436                 }
3437         }
3438         if (! defined $co{'title'} || $co{'title'} eq "") {
3439                 $co{'title'} = $co{'title_short'} = '(no commit message)';
3440         }
3441         # remove added spaces
3442         foreach my $line (@commit_lines) {
3443                 $line =~ s/^    //;
3444         }
3445         $co{'comment'} = \@commit_lines;
3446
3447         my $age = time - $co{'committer_epoch'};
3448         $co{'age'} = $age;
3449         $co{'age_string'} = age_string($age);
3450         my ($sec, $min, $hour, $mday, $mon, $year, $wday, $yday) = gmtime($co{'committer_epoch'});
3451         if ($age > 60*60*24*7*2) {
3452                 $co{'age_string_date'} = sprintf "%4i-%02u-%02i", 1900 + $year, $mon+1, $mday;
3453                 $co{'age_string_age'} = $co{'age_string'};
3454         } else {
3455                 $co{'age_string_date'} = $co{'age_string'};
3456                 $co{'age_string_age'} = sprintf "%4i-%02u-%02i", 1900 + $year, $mon+1, $mday;
3457         }
3458         return %co;
3459 }
3460
3461 sub parse_commit {
3462         my ($commit_id) = @_;
3463         my %co;
3464
3465         local $/ = "\0";
3466
3467         open my $fd, "-|", git_cmd(), "rev-list",
3468                 "--parents",
3469                 "--header",
3470                 "--max-count=1",
3471                 $commit_id,
3472                 "--",
3473                 or die_error(500, "Open git-rev-list failed");
3474         %co = parse_commit_text(<$fd>, 1);
3475         close $fd;
3476
3477         return %co;
3478 }
3479
3480 sub parse_commits {
3481         my ($commit_id, $maxcount, $skip, $filename, @args) = @_;
3482         my @cos;
3483
3484         $maxcount ||= 1;
3485         $skip ||= 0;
3486
3487         local $/ = "\0";
3488
3489         open my $fd, "-|", git_cmd(), "rev-list",
3490                 "--header",
3491                 @args,
3492                 ("--max-count=" . $maxcount),
3493                 ("--skip=" . $skip),
3494                 @extra_options,
3495                 $commit_id,
3496                 "--",
3497                 ($filename ? ($filename) : ())
3498                 or die_error(500, "Open git-rev-list failed");
3499         while (my $line = <$fd>) {
3500                 my %co = parse_commit_text($line);
3501                 push @cos, \%co;
3502         }
3503         close $fd;
3504
3505         return wantarray ? @cos : \@cos;
3506 }
3507
3508 # parse line of git-diff-tree "raw" output
3509 sub parse_difftree_raw_line {
3510         my $line = shift;
3511         my %res;
3512
3513         # ':100644 100644 03b218260e99b78c6df0ed378e59ed9205ccc96d 3b93d5e7cc7f7dd4ebed13a5cc1a4ad976fc94d8 M   ls-files.c'
3514         # ':100644 100644 7f9281985086971d3877aca27704f2aaf9c448ce bc190ebc71bbd923f2b728e505408f5e54bd073a M   rev-tree.c'
3515         if ($line =~ m/^:([0-7]{6}) ([0-7]{6}) ([0-9a-fA-F]{40}) ([0-9a-fA-F]{40}) (.)([0-9]{0,3})\t(.*)$/) {
3516                 $res{'from_mode'} = $1;
3517                 $res{'to_mode'} = $2;
3518                 $res{'from_id'} = $3;
3519                 $res{'to_id'} = $4;
3520                 $res{'status'} = $5;
3521                 $res{'similarity'} = $6;
3522                 if ($res{'status'} eq 'R' || $res{'status'} eq 'C') { # renamed or copied
3523                         ($res{'from_file'}, $res{'to_file'}) = map { unquote($_) } split("\t", $7);
3524                 } else {
3525                         $res{'from_file'} = $res{'to_file'} = $res{'file'} = unquote($7);
3526                 }
3527         }
3528         # '::100755 100755 100755 60e79ca1b01bc8b057abe17ddab484699a7f5fdb 94067cc5f73388f33722d52ae02f44692bc07490 94067cc5f73388f33722d52ae02f44692bc07490 MR git-gui/git-gui.sh'
3529         # combined diff (for merge commit)
3530         elsif ($line =~ s/^(::+)((?:[0-7]{6} )+)((?:[0-9a-fA-F]{40} )+)([a-zA-Z]+)\t(.*)$//) {
3531                 $res{'nparents'}  = length($1);
3532                 $res{'from_mode'} = [ split(' ', $2) ];
3533                 $res{'to_mode'} = pop @{$res{'from_mode'}};
3534                 $res{'from_id'} = [ split(' ', $3) ];
3535                 $res{'to_id'} = pop @{$res{'from_id'}};
3536                 $res{'status'} = [ split('', $4) ];
3537                 $res{'to_file'} = unquote($5);
3538         }
3539         # 'c512b523472485aef4fff9e57b229d9d243c967f'
3540         elsif ($line =~ m/^([0-9a-fA-F]{40})$/) {
3541                 $res{'commit'} = $1;
3542         }
3543
3544         return wantarray ? %res : \%res;
3545 }
3546
3547 # wrapper: return parsed line of git-diff-tree "raw" output
3548 # (the argument might be raw line, or parsed info)
3549 sub parsed_difftree_line {
3550         my $line_or_ref = shift;
3551
3552         if (ref($line_or_ref) eq "HASH") {
3553                 # pre-parsed (or generated by hand)
3554                 return $line_or_ref;
3555         } else {
3556                 return parse_difftree_raw_line($line_or_ref);
3557         }
3558 }
3559
3560 # parse line of git-ls-tree output
3561 sub parse_ls_tree_line {
3562         my $line = shift;
3563         my %opts = @_;
3564         my %res;
3565
3566         if ($opts{'-l'}) {
3567                 #'100644 blob 0fa3f3a66fb6a137f6ec2c19351ed4d807070ffa   16717  panic.c'
3568                 $line =~ m/^([0-9]+) (.+) ([0-9a-fA-F]{40}) +(-|[0-9]+)\t(.+)$/s;
3569
3570                 $res{'mode'} = $1;
3571                 $res{'type'} = $2;
3572                 $res{'hash'} = $3;
3573                 $res{'size'} = $4;
3574                 if ($opts{'-z'}) {
3575                         $res{'name'} = $5;
3576                 } else {
3577                         $res{'name'} = unquote($5);
3578                 }
3579         } else {
3580                 #'100644 blob 0fa3f3a66fb6a137f6ec2c19351ed4d807070ffa  panic.c'
3581                 $line =~ m/^([0-9]+) (.+) ([0-9a-fA-F]{40})\t(.+)$/s;
3582
3583                 $res{'mode'} = $1;
3584                 $res{'type'} = $2;
3585                 $res{'hash'} = $3;
3586                 if ($opts{'-z'}) {
3587                         $res{'name'} = $4;
3588                 } else {
3589                         $res{'name'} = unquote($4);
3590                 }
3591         }
3592
3593         return wantarray ? %res : \%res;
3594 }
3595
3596 # generates _two_ hashes, references to which are passed as 2 and 3 argument
3597 sub parse_from_to_diffinfo {
3598         my ($diffinfo, $from, $to, @parents) = @_;
3599
3600         if ($diffinfo->{'nparents'}) {
3601                 # combined diff
3602                 $from->{'file'} = [];
3603                 $from->{'href'} = [];
3604                 fill_from_file_info($diffinfo, @parents)
3605                         unless exists $diffinfo->{'from_file'};
3606                 for (my $i = 0; $i < $diffinfo->{'nparents'}; $i++) {
3607                         $from->{'file'}[$i] =
3608                                 defined $diffinfo->{'from_file'}[$i] ?
3609                                         $diffinfo->{'from_file'}[$i] :
3610                                         $diffinfo->{'to_file'};
3611                         if ($diffinfo->{'status'}[$i] ne "A") { # not new (added) file
3612                                 $from->{'href'}[$i] = href(action=>"blob",
3613                                                            hash_base=>$parents[$i],
3614                                                            hash=>$diffinfo->{'from_id'}[$i],
3615                                                            file_name=>$from->{'file'}[$i]);
3616                         } else {
3617                                 $from->{'href'}[$i] = undef;
3618                         }
3619                 }
3620         } else {
3621                 # ordinary (not combined) diff
3622                 $from->{'file'} = $diffinfo->{'from_file'};
3623                 if ($diffinfo->{'status'} ne "A") { # not new (added) file
3624                         $from->{'href'} = href(action=>"blob", hash_base=>$hash_parent,
3625                                                hash=>$diffinfo->{'from_id'},
3626                                                file_name=>$from->{'file'});
3627                 } else {
3628                         delete $from->{'href'};
3629                 }
3630         }
3631
3632         $to->{'file'} = $diffinfo->{'to_file'};
3633         if (!is_deleted($diffinfo)) { # file exists in result
3634                 $to->{'href'} = href(action=>"blob", hash_base=>$hash,
3635                                      hash=>$diffinfo->{'to_id'},
3636                                      file_name=>$to->{'file'});
3637         } else {
3638                 delete $to->{'href'};
3639         }
3640 }
3641
3642 ## ......................................................................
3643 ## parse to array of hashes functions
3644
3645 sub git_get_heads_list {
3646         my ($limit, @classes) = @_;
3647         @classes = ('heads') unless @classes;
3648         my @patterns = map { "refs/$_" } @classes;
3649         my @headslist;
3650
3651         open my $fd, '-|', git_cmd(), 'for-each-ref',
3652                 ($limit ? '--count='.($limit+1) : ()), '--sort=-committerdate',
3653                 '--format=%(objectname) %(refname) %(subject)%00%(committer)',
3654                 @patterns
3655                 or return;
3656         while (my $line = <$fd>) {
3657                 my %ref_item;
3658
3659                 chomp $line;
3660                 my ($refinfo, $committerinfo) = split(/\0/, $line);
3661                 my ($hash, $name, $title) = split(' ', $refinfo, 3);
3662                 my ($committer, $epoch, $tz) =
3663                         ($committerinfo =~ /^(.*) ([0-9]+) (.*)$/);
3664                 $ref_item{'fullname'}  = $name;
3665                 $name =~ s!^refs/(?:head|remote)s/!!;
3666
3667                 $ref_item{'name'}  = $name;
3668                 $ref_item{'id'}    = $hash;
3669                 $ref_item{'title'} = $title || '(no commit message)';
3670                 $ref_item{'epoch'} = $epoch;
3671                 if ($epoch) {
3672                         $ref_item{'age'} = age_string(time - $ref_item{'epoch'});
3673                 } else {
3674                         $ref_item{'age'} = "unknown";
3675                 }
3676
3677                 push @headslist, \%ref_item;
3678         }
3679         close $fd;
3680
3681         return wantarray ? @headslist : \@headslist;
3682 }
3683
3684 sub git_get_tags_list {
3685         my $limit = shift;
3686         my @tagslist;
3687
3688         open my $fd, '-|', git_cmd(), 'for-each-ref',
3689                 ($limit ? '--count='.($limit+1) : ()), '--sort=-creatordate',
3690                 '--format=%(objectname) %(objecttype) %(refname) '.
3691                 '%(*objectname) %(*objecttype) %(subject)%00%(creator)',
3692                 'refs/tags'
3693                 or return;
3694         while (my $line = <$fd>) {
3695                 my %ref_item;
3696
3697                 chomp $line;
3698                 my ($refinfo, $creatorinfo) = split(/\0/, $line);
3699                 my ($id, $type, $name, $refid, $reftype, $title) = split(' ', $refinfo, 6);
3700                 my ($creator, $epoch, $tz) =
3701                         ($creatorinfo =~ /^(.*) ([0-9]+) (.*)$/);
3702                 $ref_item{'fullname'} = $name;
3703                 $name =~ s!^refs/tags/!!;
3704
3705                 $ref_item{'type'} = $type;
3706                 $ref_item{'id'} = $id;
3707                 $ref_item{'name'} = $name;
3708                 if ($type eq "tag") {
3709                         $ref_item{'subject'} = $title;
3710                         $ref_item{'reftype'} = $reftype;
3711                         $ref_item{'refid'}   = $refid;
3712                 } else {
3713                         $ref_item{'reftype'} = $type;
3714                         $ref_item{'refid'}   = $id;
3715                 }
3716
3717                 if ($type eq "tag" || $type eq "commit") {
3718                         $ref_item{'epoch'} = $epoch;
3719                         if ($epoch) {
3720                                 $ref_item{'age'} = age_string(time - $ref_item{'epoch'});
3721                         } else {
3722                                 $ref_item{'age'} = "unknown";
3723                         }
3724                 }
3725
3726                 push @tagslist, \%ref_item;
3727         }
3728         close $fd;
3729
3730         return wantarray ? @tagslist : \@tagslist;
3731 }
3732
3733 ## ----------------------------------------------------------------------
3734 ## filesystem-related functions
3735
3736 sub get_file_owner {
3737         my $path = shift;
3738
3739         my ($dev, $ino, $mode, $nlink, $st_uid, $st_gid, $rdev, $size) = stat($path);
3740         my ($name, $passwd, $uid, $gid, $quota, $comment, $gcos, $dir, $shell) = getpwuid($st_uid);
3741         if (!defined $gcos) {
3742                 return undef;
3743         }
3744         my $owner = $gcos;
3745         $owner =~ s/[,;].*$//;
3746         return to_utf8($owner);
3747 }
3748
3749 # assume that file exists
3750 sub insert_file {
3751         my $filename = shift;
3752
3753         open my $fd, '<', $filename;
3754         print map { to_utf8($_) } <$fd>;
3755         close $fd;
3756 }
3757
3758 ## ......................................................................
3759 ## mimetype related functions
3760
3761 sub mimetype_guess_file {
3762         my $filename = shift;
3763         my $mimemap = shift;
3764         -r $mimemap or return undef;
3765
3766         my %mimemap;
3767         open(my $mh, '<', $mimemap) or return undef;
3768         while (<$mh>) {
3769                 next if m/^#/; # skip comments
3770                 my ($mimetype, @exts) = split(/\s+/);
3771                 foreach my $ext (@exts) {
3772                         $mimemap{$ext} = $mimetype;
3773                 }
3774         }
3775         close($mh);
3776
3777         $filename =~ /\.([^.]*)$/;
3778         return $mimemap{$1};
3779 }
3780
3781 sub mimetype_guess {
3782         my $filename = shift;
3783         my $mime;
3784         $filename =~ /\./ or return undef;
3785
3786         if ($mimetypes_file) {
3787                 my $file = $mimetypes_file;
3788                 if ($file !~ m!^/!) { # if it is relative path
3789                         # it is relative to project
3790                         $file = "$projectroot/$project/$file";
3791                 }
3792                 $mime = mimetype_guess_file($filename, $file);
3793         }
3794         $mime ||= mimetype_guess_file($filename, '/etc/mime.types');
3795         return $mime;
3796 }
3797
3798 sub blob_mimetype {
3799         my $fd = shift;
3800         my $filename = shift;
3801
3802         if ($filename) {
3803                 my $mime = mimetype_guess($filename);
3804                 $mime and return $mime;
3805         }
3806
3807         # just in case
3808         return $default_blob_plain_mimetype unless $fd;
3809
3810         if (-T $fd) {
3811                 return 'text/plain';
3812         } elsif (! $filename) {
3813                 return 'application/octet-stream';
3814         } elsif ($filename =~ m/\.png$/i) {
3815                 return 'image/png';
3816         } elsif ($filename =~ m/\.gif$/i) {
3817                 return 'image/gif';
3818         } elsif ($filename =~ m/\.jpe?g$/i) {
3819                 return 'image/jpeg';
3820         } else {
3821                 return 'application/octet-stream';
3822         }
3823 }
3824
3825 sub blob_contenttype {
3826         my ($fd, $file_name, $type) = @_;
3827
3828         $type ||= blob_mimetype($fd, $file_name);
3829         if ($type eq 'text/plain' && defined $default_text_plain_charset) {
3830                 $type .= "; charset=$default_text_plain_charset";
3831         }
3832
3833         return $type;
3834 }
3835
3836 # guess file syntax for syntax highlighting; return undef if no highlighting
3837 # the name of syntax can (in the future) depend on syntax highlighter used
3838 sub guess_file_syntax {
3839         my ($highlight, $mimetype, $file_name) = @_;
3840         return undef unless ($highlight && defined $file_name);
3841         my $basename = basename($file_name, '.in');
3842         return $highlight_basename{$basename}
3843                 if exists $highlight_basename{$basename};
3844
3845         $basename =~ /\.([^.]*)$/;
3846         my $ext = $1 or return undef;
3847         return $highlight_ext{$ext}
3848                 if exists $highlight_ext{$ext};
3849
3850         return undef;
3851 }
3852
3853 # run highlighter and return FD of its output,
3854 # or return original FD if no highlighting
3855 sub run_highlighter {
3856         my ($fd, $highlight, $syntax) = @_;
3857         return $fd unless ($highlight && defined $syntax);
3858
3859         close $fd;
3860         open $fd, quote_command(git_cmd(), "cat-file", "blob", $hash)." | ".
3861                   quote_command($highlight_bin).
3862                   " --replace-tabs=8 --fragment --syntax $syntax |"
3863                 or die_error(500, "Couldn't open file or run syntax highlighter");
3864         return $fd;
3865 }
3866
3867 ## ======================================================================
3868 ## functions printing HTML: header, footer, error page
3869
3870 sub get_page_title {
3871         my $title = to_utf8($site_name);
3872
3873         unless (defined $project) {
3874                 if (defined $project_filter) {
3875                         $title .= " - projects in '" . esc_path($project_filter) . "'";
3876                 }
3877                 return $title;
3878         }
3879         $title .= " - " . to_utf8($project);
3880
3881         return $title unless (defined $action);
3882         $title .= "/$action"; # $action is US-ASCII (7bit ASCII)
3883
3884         return $title unless (defined $file_name);
3885         $title .= " - " . esc_path($file_name);
3886         if ($action eq "tree" && $file_name !~ m|/$|) {
3887                 $title .= "/";
3888         }
3889
3890         return $title;
3891 }
3892
3893 sub get_content_type_html {
3894         # require explicit support from the UA if we are to send the page as
3895         # 'application/xhtml+xml', otherwise send it as plain old 'text/html'.
3896         # we have to do this because MSIE sometimes globs '*/*', pretending to
3897         # support xhtml+xml but choking when it gets what it asked for.
3898         if (defined $cgi->http('HTTP_ACCEPT') &&
3899             $cgi->http('HTTP_ACCEPT') =~ m/(,|;|\s|^)application\/xhtml\+xml(,|;|\s|$)/ &&
3900             $cgi->Accept('application/xhtml+xml') != 0) {
3901                 return 'application/xhtml+xml';
3902         } else {
3903                 return 'text/html';
3904         }
3905 }
3906
3907 sub print_feed_meta {
3908         if (defined $project) {
3909                 my %href_params = get_feed_info();
3910                 if (!exists $href_params{'-title'}) {
3911                         $href_params{'-title'} = 'log';
3912                 }
3913
3914                 foreach my $format (qw(RSS Atom)) {
3915                         my $type = lc($format);
3916                         my %link_attr = (
3917                                 '-rel' => 'alternate',
3918                                 '-title' => esc_attr("$project - $href_params{'-title'} - $format feed"),
3919                                 '-type' => "application/$type+xml"
3920                         );
3921
3922                         $href_params{'extra_options'} = undef;
3923                         $href_params{'action'} = $type;
3924                         $link_attr{'-href'} = href(%href_params);
3925                         print "<link ".
3926                               "rel=\"$link_attr{'-rel'}\" ".
3927                               "title=\"$link_attr{'-title'}\" ".
3928                               "href=\"$link_attr{'-href'}\" ".
3929                               "type=\"$link_attr{'-type'}\" ".
3930                               "/>\n";
3931
3932                         $href_params{'extra_options'} = '--no-merges';
3933                         $link_attr{'-href'} = href(%href_params);
3934                         $link_attr{'-title'} .= ' (no merges)';
3935                         print "<link ".
3936                               "rel=\"$link_attr{'-rel'}\" ".
3937                               "title=\"$link_attr{'-title'}\" ".
3938                               "href=\"$link_attr{'-href'}\" ".
3939                               "type=\"$link_attr{'-type'}\" ".
3940                               "/>\n";
3941                 }
3942
3943         } else {
3944                 printf('<link rel="alternate" title="%s projects list" '.
3945                        'href="%s" type="text/plain; charset=utf-8" />'."\n",
3946                        esc_attr($site_name), href(project=>undef, action=>"project_index"));
3947                 printf('<link rel="alternate" title="%s projects feeds" '.
3948                        'href="%s" type="text/x-opml" />'."\n",
3949                        esc_attr($site_name), href(project=>undef, action=>"opml"));
3950         }
3951 }
3952
3953 sub print_header_links {
3954         my $status = shift;
3955
3956         # print out each stylesheet that exist, providing backwards capability
3957         # for those people who defined $stylesheet in a config file
3958         if (defined $stylesheet) {
3959                 print '<link rel="stylesheet" type="text/css" href="'.esc_url($stylesheet).'"/>'."\n";
3960         } else {
3961                 foreach my $stylesheet (@stylesheets) {
3962                         next unless $stylesheet;
3963                         print '<link rel="stylesheet" type="text/css" href="'.esc_url($stylesheet).'"/>'."\n";
3964                 }
3965         }
3966         print_feed_meta()
3967                 if ($status eq '200 OK');
3968         if (defined $favicon) {
3969                 print qq(<link rel="shortcut icon" href=").esc_url($favicon).qq(" type="image/png" />\n);
3970         }
3971 }
3972
3973 sub print_nav_breadcrumbs_path {
3974         my $dirprefix = undef;
3975         while (my $part = shift) {
3976                 $dirprefix .= "/" if defined $dirprefix;
3977                 $dirprefix .= $part;
3978                 print $cgi->a({-href => href(project => undef,
3979                                              project_filter => $dirprefix,
3980                                              action => "project_list")},
3981                               esc_html($part)) . " / ";
3982         }
3983 }
3984
3985 sub print_nav_breadcrumbs {
3986         my %opts = @_;
3987
3988         for my $crumb (@extra_breadcrumbs, [ $home_link_str => $home_link ]) {
3989                 print $cgi->a({-href => esc_url($crumb->[1])}, $crumb->[0]) . " / ";
3990         }
3991         if (defined $project) {
3992                 my @dirname = split '/', $project;
3993                 my $projectbasename = pop @dirname;
3994                 print_nav_breadcrumbs_path(@dirname);
3995                 print $cgi->a({-href => href(action=>"summary")}, esc_html($projectbasename));
3996                 if (defined $action) {
3997                         my $action_print = $action ;
3998                         if (defined $opts{-action_extra}) {
3999                                 $action_print = $cgi->a({-href => href(action=>$action)},
4000                                         $action);
4001                         }
4002                         print " / $action_print";
4003                 }
4004                 if (defined $opts{-action_extra}) {
4005                         print " / $opts{-action_extra}";
4006                 }
4007                 print "\n";
4008         } elsif (defined $project_filter) {
4009                 print_nav_breadcrumbs_path(split '/', $project_filter);
4010         }
4011 }
4012
4013 sub print_search_form {
4014         if (!defined $searchtext) {
4015                 $searchtext = "";
4016         }
4017         my $search_hash;
4018         if (defined $hash_base) {
4019                 $search_hash = $hash_base;
4020         } elsif (defined $hash) {
4021                 $search_hash = $hash;
4022         } else {
4023                 $search_hash = "HEAD";
4024         }
4025         my $action = $my_uri;
4026         my $use_pathinfo = gitweb_check_feature('pathinfo');
4027         if ($use_pathinfo) {
4028                 $action .= "/".esc_url($project);
4029         }
4030         print $cgi->startform(-method => "get", -action => $action) .
4031               "<div class=\"search\">\n" .
4032               (!$use_pathinfo &&
4033               $cgi->input({-name=>"p", -value=>$project, -type=>"hidden"}) . "\n") .
4034               $cgi->input({-name=>"a", -value=>"search", -type=>"hidden"}) . "\n" .
4035               $cgi->input({-name=>"h", -value=>$search_hash, -type=>"hidden"}) . "\n" .
4036               $cgi->popup_menu(-name => 'st', -default => 'commit',
4037                                -values => ['commit', 'grep', 'author', 'committer', 'pickaxe']) .
4038               $cgi->sup($cgi->a({-href => href(action=>"search_help")}, "?")) .
4039               " search:\n",
4040               $cgi->textfield(-name => "s", -value => $searchtext, -override => 1) . "\n" .
4041               "<span title=\"Extended regular expression\">" .
4042               $cgi->checkbox(-name => 'sr', -value => 1, -label => 're',
4043                              -checked => $search_use_regexp) .
4044               "</span>" .
4045               "</div>" .
4046               $cgi->end_form() . "\n";
4047 }
4048
4049 sub git_header_html {
4050         my $status = shift || "200 OK";
4051         my $expires = shift;
4052         my %opts = @_;
4053
4054         my $title = get_page_title();
4055         my $content_type = get_content_type_html();
4056         print $cgi->header(-type=>$content_type, -charset => 'utf-8',
4057                            -status=> $status, -expires => $expires)
4058                 unless ($opts{'-no_http_header'});
4059         my $mod_perl_version = $ENV{'MOD_PERL'} ? " $ENV{'MOD_PERL'}" : '';
4060         print <<EOF;
4061 <?xml version="1.0" encoding="utf-8"?>
4062 <!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Strict//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-strict.dtd">
4063 <html xmlns="http://www.w3.org/1999/xhtml" xml:lang="en-US" lang="en-US">
4064 <!-- git web interface version $version, (C) 2005-2006, Kay Sievers <kay.sievers\@vrfy.org>, Christian Gierke -->
4065 <!-- git core binaries version $git_version -->
4066 <head>
4067 <meta http-equiv="content-type" content="$content_type; charset=utf-8"/>
4068 <meta name="generator" content="gitweb/$version git/$git_version$mod_perl_version"/>
4069 <meta name="robots" content="index, nofollow"/>
4070 <title>$title</title>
4071 EOF
4072         # the stylesheet, favicon etc urls won't work correctly with path_info
4073         # unless we set the appropriate base URL
4074         if ($ENV{'PATH_INFO'}) {
4075                 print "<base href=\"".esc_url($base_url)."\" />\n";
4076         }
4077         print_header_links($status);
4078
4079         if (defined $site_html_head_string) {
4080                 print to_utf8($site_html_head_string);
4081         }
4082
4083         print "</head>\n" .
4084               "<body>\n";
4085
4086         if (defined $site_header && -f $site_header) {
4087                 insert_file($site_header);
4088         }
4089
4090         print "<div class=\"page_header\">\n";
4091         if (defined $logo) {
4092                 print $cgi->a({-href => esc_url($logo_url),
4093                                -title => $logo_label},
4094                               $cgi->img({-src => esc_url($logo),
4095                                          -width => 72, -height => 27,
4096                                          -alt => "git",
4097                                          -class => "logo"}));
4098         }
4099         print_nav_breadcrumbs(%opts);
4100         print "</div>\n";
4101
4102         my $have_search = gitweb_check_feature('search');
4103         if (defined $project && $have_search) {
4104                 print_search_form();
4105         }
4106 }
4107
4108 sub git_footer_html {
4109         my $feed_class = 'rss_logo';
4110
4111         print "<div class=\"page_footer\">\n";
4112         if (defined $project) {
4113                 my $descr = git_get_project_description($project);
4114                 if (defined $descr) {
4115                         print "<div class=\"page_footer_text\">" . esc_html($descr) . "</div>\n";
4116                 }
4117
4118                 my %href_params = get_feed_info();
4119                 if (!%href_params) {
4120                         $feed_class .= ' generic';
4121                 }
4122                 $href_params{'-title'} ||= 'log';
4123
4124                 foreach my $format (qw(RSS Atom)) {
4125                         $href_params{'action'} = lc($format);
4126                         print $cgi->a({-href => href(%href_params),
4127                                       -title => "$href_params{'-title'} $format feed",
4128                                       -class => $feed_class}, $format)."\n";
4129                 }
4130
4131         } else {
4132                 print $cgi->a({-href => href(project=>undef, action=>"opml",
4133                                              project_filter => $project_filter),
4134                               -class => $feed_class}, "OPML") . " ";
4135                 print $cgi->a({-href => href(project=>undef, action=>"project_index",
4136                                              project_filter => $project_filter),
4137                               -class => $feed_class}, "TXT") . "\n";
4138         }
4139         print "</div>\n"; # class="page_footer"
4140
4141         if (defined $t0 && gitweb_check_feature('timed')) {
4142                 print "<div id=\"generating_info\">\n";
4143                 print 'This page took '.
4144                       '<span id="generating_time" class="time_span">'.
4145                       tv_interval($t0, [ gettimeofday() ]).
4146                       ' seconds </span>'.
4147                       ' and '.
4148                       '<span id="generating_cmd">'.
4149                       $number_of_git_cmds.
4150                       '</span> git commands '.
4151                       " to generate.\n";
4152                 print "</div>\n"; # class="page_footer"
4153         }
4154
4155         if (defined $site_footer && -f $site_footer) {
4156                 insert_file($site_footer);
4157         }
4158
4159         print qq!<script type="text/javascript" src="!.esc_url($javascript).qq!"></script>\n!;
4160         if (defined $action &&
4161             $action eq 'blame_incremental') {
4162                 print qq!<script type="text/javascript">\n!.
4163                       qq!startBlame("!. href(action=>"blame_data", -replay=>1) .qq!",\n!.
4164                       qq!           "!. href() .qq!");\n!.
4165                       qq!</script>\n!;
4166         } else {
4167                 my ($jstimezone, $tz_cookie, $datetime_class) =
4168                         gitweb_get_feature('javascript-timezone');
4169
4170                 print qq!<script type="text/javascript">\n!.
4171                       qq!window.onload = function () {\n!;
4172                 if (gitweb_check_feature('javascript-actions')) {
4173                         print qq!       fixLinks();\n!;
4174                 }
4175                 if ($jstimezone && $tz_cookie && $datetime_class) {
4176                         print qq!       var tz_cookie = { name: '$tz_cookie', expires: 14, path: '/' };\n!. # in days
4177                               qq!       onloadTZSetup('$jstimezone', tz_cookie, '$datetime_class');\n!;
4178                 }
4179                 print qq!};\n!.
4180                       qq!</script>\n!;
4181         }
4182
4183         print "</body>\n" .
4184               "</html>";
4185 }
4186
4187 # die_error(<http_status_code>, <error_message>[, <detailed_html_description>])
4188 # Example: die_error(404, 'Hash not found')
4189 # By convention, use the following status codes (as defined in RFC 2616):
4190 # 400: Invalid or missing CGI parameters, or
4191 #      requested object exists but has wrong type.
4192 # 403: Requested feature (like "pickaxe" or "snapshot") not enabled on
4193 #      this server or project.
4194 # 404: Requested object/revision/project doesn't exist.
4195 # 500: The server isn't configured properly, or
4196 #      an internal error occurred (e.g. failed assertions caused by bugs), or
4197 #      an unknown error occurred (e.g. the git binary died unexpectedly).
4198 # 503: The server is currently unavailable (because it is overloaded,
4199 #      or down for maintenance).  Generally, this is a temporary state.
4200 sub die_error {
4201         my $status = shift || 500;
4202         my $error = esc_html(shift) || "Internal Server Error";
4203         my $extra = shift;
4204         my %opts = @_;
4205
4206         my %http_responses = (
4207                 400 => '400 Bad Request',
4208                 403 => '403 Forbidden',
4209                 404 => '404 Not Found',
4210                 500 => '500 Internal Server Error',
4211                 503 => '503 Service Unavailable',
4212         );
4213         git_header_html($http_responses{$status}, undef, %opts);
4214         print <<EOF;
4215 <div class="page_body">
4216 <br /><br />
4217 $status - $error
4218 <br />
4219 EOF
4220         if (defined $extra) {
4221                 print "<hr />\n" .
4222                       "$extra\n";
4223         }
4224         print "</div>\n";
4225
4226         git_footer_html();
4227         goto DONE_GITWEB
4228                 unless ($opts{'-error_handler'});
4229 }
4230
4231 ## ----------------------------------------------------------------------
4232 ## functions printing or outputting HTML: navigation
4233
4234 sub git_print_page_nav {
4235         my ($current, $suppress, $head, $treehead, $treebase, $extra) = @_;
4236         $extra = '' if !defined $extra; # pager or formats
4237
4238         my @navs = qw(summary shortlog log commit commitdiff tree);
4239         if ($suppress) {
4240                 @navs = grep { $_ ne $suppress } @navs;
4241         }
4242
4243         my %arg = map { $_ => {action=>$_} } @navs;
4244         if (defined $head) {
4245                 for (qw(commit commitdiff)) {
4246                         $arg{$_}{'hash'} = $head;
4247                 }
4248                 if ($current =~ m/^(tree | log | shortlog | commit | commitdiff | search)$/x) {
4249                         for (qw(shortlog log)) {
4250                                 $arg{$_}{'hash'} = $head;
4251                         }
4252                 }
4253         }
4254
4255         $arg{'tree'}{'hash'} = $treehead if defined $treehead;
4256         $arg{'tree'}{'hash_base'} = $treebase if defined $treebase;
4257
4258         my @actions = gitweb_get_feature('actions');
4259         my %repl = (
4260                 '%' => '%',
4261                 'n' => $project,         # project name
4262                 'f' => $git_dir,         # project path within filesystem
4263                 'h' => $treehead || '',  # current hash ('h' parameter)
4264                 'b' => $treebase || '',  # hash base ('hb' parameter)
4265         );
4266         while (@actions) {
4267                 my ($label, $link, $pos) = splice(@actions,0,3);
4268                 # insert
4269                 @navs = map { $_ eq $pos ? ($_, $label) : $_ } @navs;
4270                 # munch munch
4271                 $link =~ s/%([%nfhb])/$repl{$1}/g;
4272                 $arg{$label}{'_href'} = $link;
4273         }
4274
4275         print "<div class=\"page_nav\">\n" .
4276                 (join " | ",
4277                  map { $_ eq $current ?
4278                        $_ : $cgi->a({-href => ($arg{$_}{_href} ? $arg{$_}{_href} : href(%{$arg{$_}}))}, "$_")
4279                  } @navs);
4280         print "<br/>\n$extra<br/>\n" .
4281               "</div>\n";
4282 }
4283
4284 # returns a submenu for the nagivation of the refs views (tags, heads,
4285 # remotes) with the current view disabled and the remotes view only
4286 # available if the feature is enabled
4287 sub format_ref_views {
4288         my ($current) = @_;
4289         my @ref_views = qw{tags heads};
4290         push @ref_views, 'remotes' if gitweb_check_feature('remote_heads');
4291         return join " | ", map {
4292                 $_ eq $current ? $_ :
4293                 $cgi->a({-href => href(action=>$_)}, $_)
4294         } @ref_views
4295 }
4296
4297 sub format_paging_nav {
4298         my ($action, $page, $has_next_link) = @_;
4299         my $paging_nav;
4300
4301
4302         if ($page > 0) {
4303                 $paging_nav .=
4304                         $cgi->a({-href => href(-replay=>1, page=>undef)}, "first") .
4305                         " &sdot; " .
4306                         $cgi->a({-href => href(-replay=>1, page=>$page-1),
4307                                  -accesskey => "p", -title => "Alt-p"}, "prev");
4308         } else {
4309                 $paging_nav .= "first &sdot; prev";
4310         }
4311
4312         if ($has_next_link) {
4313                 $paging_nav .= " &sdot; " .
4314                         $cgi->a({-href => href(-replay=>1, page=>$page+1),
4315                                  -accesskey => "n", -title => "Alt-n"}, "next");
4316         } else {
4317                 $paging_nav .= " &sdot; next";
4318         }
4319
4320         return $paging_nav;
4321 }
4322
4323 ## ......................................................................
4324 ## functions printing or outputting HTML: div
4325
4326 sub git_print_header_div {
4327         my ($action, $title, $hash, $hash_base) = @_;
4328         my %args = ();
4329
4330         $args{'action'} = $action;
4331         $args{'hash'} = $hash if $hash;
4332         $args{'hash_base'} = $hash_base if $hash_base;
4333
4334         print "<div class=\"header\">\n" .
4335               $cgi->a({-href => href(%args), -class => "title"},
4336               $title ? $title : $action) .
4337               "\n</div>\n";
4338 }
4339
4340 sub format_repo_url {
4341         my ($name, $url) = @_;
4342         return "<tr class=\"metadata_url\"><td>$name</td><td>$url</td></tr>\n";
4343 }
4344
4345 # Group output by placing it in a DIV element and adding a header.
4346 # Options for start_div() can be provided by passing a hash reference as the
4347 # first parameter to the function.
4348 # Options to git_print_header_div() can be provided by passing an array
4349 # reference. This must follow the options to start_div if they are present.
4350 # The content can be a scalar, which is output as-is, a scalar reference, which
4351 # is output after html escaping, an IO handle passed either as *handle or
4352 # *handle{IO}, or a function reference. In the latter case all following
4353 # parameters will be taken as argument to the content function call.
4354 sub git_print_section {
4355         my ($div_args, $header_args, $content);
4356         my $arg = shift;
4357         if (ref($arg) eq 'HASH') {
4358                 $div_args = $arg;
4359                 $arg = shift;
4360         }
4361         if (ref($arg) eq 'ARRAY') {
4362                 $header_args = $arg;
4363                 $arg = shift;
4364         }
4365         $content = $arg;
4366
4367         print $cgi->start_div($div_args);
4368         git_print_header_div(@$header_args);
4369
4370         if (ref($content) eq 'CODE') {
4371                 $content->(@_);
4372         } elsif (ref($content) eq 'SCALAR') {
4373                 print esc_html($$content);
4374         } elsif (ref($content) eq 'GLOB' or ref($content) eq 'IO::Handle') {
4375                 print <$content>;
4376         } elsif (!ref($content) && defined($content)) {
4377                 print $content;
4378         }
4379
4380         print $cgi->end_div;
4381 }
4382
4383 sub format_timestamp_html {
4384         my $date = shift;
4385         my $strtime = $date->{'rfc2822'};
4386
4387         my (undef, undef, $datetime_class) =
4388                 gitweb_get_feature('javascript-timezone');
4389         if ($datetime_class) {
4390                 $strtime = qq!<span class="$datetime_class">$strtime</span>!;
4391         }
4392
4393         my $localtime_format = '(%02d:%02d %s)';
4394         if ($date->{'hour_local'} < 6) {
4395                 $localtime_format = '(<span class="atnight">%02d:%02d</span> %s)';
4396         }
4397         $strtime .= ' ' .
4398                     sprintf($localtime_format,
4399                             $date->{'hour_local'}, $date->{'minute_local'}, $date->{'tz_local'});
4400
4401         return $strtime;
4402 }
4403
4404 # Outputs the author name and date in long form
4405 sub git_print_authorship {
4406         my $co = shift;
4407         my %opts = @_;
4408         my $tag = $opts{-tag} || 'div';
4409         my $author = $co->{'author_name'};
4410
4411         my %ad = parse_date($co->{'author_epoch'}, $co->{'author_tz'});
4412         print "<$tag class=\"author_date\">" .
4413               format_search_author($author, "author", esc_html($author)) .
4414               " [".format_timestamp_html(\%ad)."]".
4415               git_get_avatar($co->{'author_email'}, -pad_before => 1) .
4416               "</$tag>\n";
4417 }
4418
4419 # Outputs table rows containing the full author or committer information,
4420 # in the format expected for 'commit' view (& similar).
4421 # Parameters are a commit hash reference, followed by the list of people
4422 # to output information for. If the list is empty it defaults to both
4423 # author and committer.
4424 sub git_print_authorship_rows {
4425         my $co = shift;
4426         # too bad we can't use @people = @_ || ('author', 'committer')
4427         my @people = @_;
4428         @people = ('author', 'committer') unless @people;
4429         foreach my $who (@people) {
4430                 my %wd = parse_date($co->{"${who}_epoch"}, $co->{"${who}_tz"});
4431                 print "<tr><td>$who</td><td>" .
4432                       format_search_author($co->{"${who}_name"}, $who,
4433                                            esc_html($co->{"${who}_name"})) . " " .
4434                       format_search_author($co->{"${who}_email"}, $who,
4435                                            esc_html("<" . $co->{"${who}_email"} . ">")) .
4436                       "</td><td rowspan=\"2\">" .
4437                       git_get_avatar($co->{"${who}_email"}, -size => 'double') .
4438                       "</td></tr>\n" .
4439                       "<tr>" .
4440                       "<td></td><td>" .
4441                       format_timestamp_html(\%wd) .
4442                       "</td>" .
4443                       "</tr>\n";
4444         }
4445 }
4446
4447 sub git_print_page_path {
4448         my $name = shift;
4449         my $type = shift;
4450         my $hb = shift;
4451
4452
4453         print "<div class=\"page_path\">";
4454         print $cgi->a({-href => href(action=>"tree", hash_base=>$hb),
4455                       -title => 'tree root'}, to_utf8("[$project]"));
4456         print " / ";
4457         if (defined $name) {
4458                 my @dirname = split '/', $name;
4459                 my $basename = pop @dirname;
4460                 my $fullname = '';
4461
4462                 foreach my $dir (@dirname) {
4463                         $fullname .= ($fullname ? '/' : '') . $dir;
4464                         print $cgi->a({-href => href(action=>"tree", file_name=>$fullname,
4465                                                      hash_base=>$hb),
4466                                       -title => $fullname}, esc_path($dir));
4467                         print " / ";
4468                 }
4469                 if (defined $type && $type eq 'blob') {
4470                         print $cgi->a({-href => href(action=>"blob_plain", file_name=>$file_name,
4471                                                      hash_base=>$hb),
4472                                       -title => $name}, esc_path($basename));
4473                 } elsif (defined $type && $type eq 'tree') {
4474                         print $cgi->a({-href => href(action=>"tree", file_name=>$file_name,
4475                                                      hash_base=>$hb),
4476                                       -title => $name}, esc_path($basename));
4477                         print " / ";
4478                 } else {
4479                         print esc_path($basename);
4480                 }
4481         }
4482         print "<br/></div>\n";
4483 }
4484
4485 sub git_print_log {
4486         my $log = shift;
4487         my %opts = @_;
4488
4489         if ($opts{'-remove_title'}) {
4490                 # remove title, i.e. first line of log
4491                 shift @$log;
4492         }
4493         # remove leading empty lines
4494         while (defined $log->[0] && $log->[0] eq "") {
4495                 shift @$log;
4496         }
4497
4498         # print log
4499         my $skip_blank_line = 0;
4500         foreach my $line (@$log) {
4501                 if ($line =~ m/^\s*([A-Z][-A-Za-z]*-[Bb]y|C[Cc]): /) {
4502                         if (! $opts{'-remove_signoff'}) {
4503                                 print "<span class=\"signoff\">" . esc_html($line) . "</span><br/>\n";
4504                                 $skip_blank_line = 1;
4505                         }
4506                         next;
4507                 }
4508
4509                 if ($line =~ m,\s*([a-z]*link): (https?://\S+),i) {
4510                         if (! $opts{'-remove_signoff'}) {
4511                                 print "<span class=\"signoff\">" . esc_html($1) . ": " .
4512                                         "<a href=\"" . esc_html($2) . "\">" . esc_html($2) . "</a>" .
4513                                         "</span><br/>\n";
4514                                 $skip_blank_line = 1;
4515                         }
4516                         next;
4517                 }
4518
4519                 # print only one empty line
4520                 # do not print empty line after signoff
4521                 if ($line eq "") {
4522                         next if ($skip_blank_line);
4523                         $skip_blank_line = 1;
4524                 } else {
4525                         $skip_blank_line = 0;
4526                 }
4527
4528                 print format_log_line_html($line) . "<br/>\n";
4529         }
4530
4531         if ($opts{'-final_empty_line'}) {
4532                 # end with single empty line
4533                 print "<br/>\n" unless $skip_blank_line;
4534         }
4535 }
4536
4537 # return link target (what link points to)
4538 sub git_get_link_target {
4539         my $hash = shift;
4540         my $link_target;
4541
4542         # read link
4543         open my $fd, "-|", git_cmd(), "cat-file", "blob", $hash
4544                 or return;
4545         {
4546                 local $/ = undef;
4547                 $link_target = <$fd>;
4548         }
4549         close $fd
4550                 or return;
4551
4552         return $link_target;
4553 }
4554
4555 # given link target, and the directory (basedir) the link is in,
4556 # return target of link relative to top directory (top tree);
4557 # return undef if it is not possible (including absolute links).
4558 sub normalize_link_target {
4559         my ($link_target, $basedir) = @_;
4560
4561         # absolute symlinks (beginning with '/') cannot be normalized
4562         return if (substr($link_target, 0, 1) eq '/');
4563
4564         # normalize link target to path from top (root) tree (dir)
4565         my $path;
4566         if ($basedir) {
4567                 $path = $basedir . '/' . $link_target;
4568         } else {
4569                 # we are in top (root) tree (dir)
4570                 $path = $link_target;
4571         }
4572
4573         # remove //, /./, and /../
4574         my @path_parts;
4575         foreach my $part (split('/', $path)) {
4576                 # discard '.' and ''
4577                 next if (!$part || $part eq '.');
4578                 # handle '..'
4579                 if ($part eq '..') {
4580                         if (@path_parts) {
4581                                 pop @path_parts;
4582                         } else {
4583                                 # link leads outside repository (outside top dir)
4584                                 return;
4585                         }
4586                 } else {
4587                         push @path_parts, $part;
4588                 }
4589         }
4590         $path = join('/', @path_parts);
4591
4592         return $path;
4593 }
4594
4595 # print tree entry (row of git_tree), but without encompassing <tr> element
4596 sub git_print_tree_entry {
4597         my ($t, $basedir, $hash_base, $have_blame) = @_;
4598
4599         my %base_key = ();
4600         $base_key{'hash_base'} = $hash_base if defined $hash_base;
4601
4602         # The format of a table row is: mode list link.  Where mode is
4603         # the mode of the entry, list is the name of the entry, an href,
4604         # and link is the action links of the entry.
4605
4606         print "<td class=\"mode\">" . mode_str($t->{'mode'}) . "</td>\n";
4607         if (exists $t->{'size'}) {
4608                 print "<td class=\"size\">$t->{'size'}</td>\n";
4609         }
4610         if ($t->{'type'} eq "blob") {
4611                 print "<td class=\"list\">" .
4612                         $cgi->a({-href => href(action=>"blob", hash=>$t->{'hash'},
4613                                                file_name=>"$basedir$t->{'name'}", %base_key),
4614                                 -class => "list"}, esc_path($t->{'name'}));
4615                 if (S_ISLNK(oct $t->{'mode'})) {
4616                         my $link_target = git_get_link_target($t->{'hash'});
4617                         if ($link_target) {
4618                                 my $norm_target = normalize_link_target($link_target, $basedir);
4619                                 if (defined $norm_target) {
4620                                         print " -> " .
4621                                               $cgi->a({-href => href(action=>"object", hash_base=>$hash_base,
4622                                                                      file_name=>$norm_target),
4623                                                        -title => $norm_target}, esc_path($link_target));
4624                                 } else {
4625                                         print " -> " . esc_path($link_target);
4626                                 }
4627                         }
4628                 }
4629                 print "</td>\n";
4630                 print "<td class=\"link\">";
4631                 print $cgi->a({-href => href(action=>"blob", hash=>$t->{'hash'},
4632                                              file_name=>"$basedir$t->{'name'}", %base_key)},
4633                               "blob");
4634                 if ($have_blame) {
4635                         print " | " .
4636                               $cgi->a({-href => href(action=>"blame", hash=>$t->{'hash'},
4637                                                      file_name=>"$basedir$t->{'name'}", %base_key)},
4638                                       "blame");
4639                 }
4640                 if (defined $hash_base) {
4641                         print " | " .
4642                               $cgi->a({-href => href(action=>"history", hash_base=>$hash_base,
4643                                                      hash=>$t->{'hash'}, file_name=>"$basedir$t->{'name'}")},
4644                                       "history");
4645                 }
4646                 print " | " .
4647                         $cgi->a({-href => href(action=>"blob_plain", hash_base=>$hash_base,
4648                                                file_name=>"$basedir$t->{'name'}")},
4649                                 "raw");
4650                 print "</td>\n";
4651
4652         } elsif ($t->{'type'} eq "tree") {
4653                 print "<td class=\"list\">";
4654                 print $cgi->a({-href => href(action=>"tree", hash=>$t->{'hash'},
4655                                              file_name=>"$basedir$t->{'name'}",
4656                                              %base_key)},
4657                               esc_path($t->{'name'}));
4658                 print "</td>\n";
4659                 print "<td class=\"link\">";
4660                 print $cgi->a({-href => href(action=>"tree", hash=>$t->{'hash'},
4661                                              file_name=>"$basedir$t->{'name'}",
4662                                              %base_key)},
4663                               "tree");
4664                 if (defined $hash_base) {
4665                         print " | " .
4666                               $cgi->a({-href => href(action=>"history", hash_base=>$hash_base,
4667                                                      file_name=>"$basedir$t->{'name'}")},
4668                                       "history");
4669                 }
4670                 print "</td>\n";
4671         } else {
4672                 # unknown object: we can only present history for it
4673                 # (this includes 'commit' object, i.e. submodule support)
4674                 print "<td class=\"list\">" .
4675                       esc_path($t->{'name'}) .
4676                       "</td>\n";
4677                 print "<td class=\"link\">";
4678                 if (defined $hash_base) {
4679                         print $cgi->a({-href => href(action=>"history",
4680                                                      hash_base=>$hash_base,
4681                                                      file_name=>"$basedir$t->{'name'}")},
4682                                       "history");
4683                 }
4684                 print "</td>\n";
4685         }
4686 }
4687
4688 ## ......................................................................
4689 ## functions printing large fragments of HTML
4690
4691 # get pre-image filenames for merge (combined) diff
4692 sub fill_from_file_info {
4693         my ($diff, @parents) = @_;
4694
4695         $diff->{'from_file'} = [ ];
4696         $diff->{'from_file'}[$diff->{'nparents'} - 1] = undef;
4697         for (my $i = 0; $i < $diff->{'nparents'}; $i++) {
4698                 if ($diff->{'status'}[$i] eq 'R' ||
4699                     $diff->{'status'}[$i] eq 'C') {
4700                         $diff->{'from_file'}[$i] =
4701                                 git_get_path_by_hash($parents[$i], $diff->{'from_id'}[$i]);
4702                 }
4703         }
4704
4705         return $diff;
4706 }
4707
4708 # is current raw difftree line of file deletion
4709 sub is_deleted {
4710         my $diffinfo = shift;
4711
4712         return $diffinfo->{'to_id'} eq ('0' x 40);
4713 }
4714
4715 # does patch correspond to [previous] difftree raw line
4716 # $diffinfo  - hashref of parsed raw diff format
4717 # $patchinfo - hashref of parsed patch diff format
4718 #              (the same keys as in $diffinfo)
4719 sub is_patch_split {
4720         my ($diffinfo, $patchinfo) = @_;
4721
4722         return defined $diffinfo && defined $patchinfo
4723                 && $diffinfo->{'to_file'} eq $patchinfo->{'to_file'};
4724 }
4725
4726
4727 sub git_difftree_body {
4728         my ($difftree, $hash, @parents) = @_;
4729         my ($parent) = $parents[0];
4730         my $have_blame = gitweb_check_feature('blame');
4731         print "<div class=\"list_head\">\n";
4732         if ($#{$difftree} > 10) {
4733                 print(($#{$difftree} + 1) . " files changed:\n");
4734         }
4735         print "</div>\n";
4736
4737         print "<table class=\"" .
4738               (@parents > 1 ? "combined " : "") .
4739               "diff_tree\">\n";
4740
4741         # header only for combined diff in 'commitdiff' view
4742         my $has_header = @$difftree && @parents > 1 && $action eq 'commitdiff';
4743         if ($has_header) {
4744                 # table header
4745                 print "<thead><tr>\n" .
4746                        "<th></th><th></th>\n"; # filename, patchN link
4747                 for (my $i = 0; $i < @parents; $i++) {
4748                         my $par = $parents[$i];
4749                         print "<th>" .
4750                               $cgi->a({-href => href(action=>"commitdiff",
4751                                                      hash=>$hash, hash_parent=>$par),
4752                                        -title => 'commitdiff to parent number ' .
4753                                                   ($i+1) . ': ' . substr($par,0,7)},
4754                                       $i+1) .
4755                               "&nbsp;</th>\n";
4756                 }
4757                 print "</tr></thead>\n<tbody>\n";
4758         }
4759
4760         my $alternate = 1;
4761         my $patchno = 0;
4762         foreach my $line (@{$difftree}) {
4763                 my $diff = parsed_difftree_line($line);
4764
4765                 if ($alternate) {
4766                         print "<tr class=\"dark\">\n";
4767                 } else {
4768                         print "<tr class=\"light\">\n";
4769                 }
4770                 $alternate ^= 1;
4771
4772                 if (exists $diff->{'nparents'}) { # combined diff
4773
4774                         fill_from_file_info($diff, @parents)
4775                                 unless exists $diff->{'from_file'};
4776
4777                         if (!is_deleted($diff)) {
4778                                 # file exists in the result (child) commit
4779                                 print "<td>" .
4780                                       $cgi->a({-href => href(action=>"blob", hash=>$diff->{'to_id'},
4781                                                              file_name=>$diff->{'to_file'},
4782                                                              hash_base=>$hash),
4783                                               -class => "list"}, esc_path($diff->{'to_file'})) .
4784                                       "</td>\n";
4785                         } else {
4786                                 print "<td>" .
4787                                       esc_path($diff->{'to_file'}) .
4788                                       "</td>\n";
4789                         }
4790
4791                         if ($action eq 'commitdiff') {
4792                                 # link to patch
4793                                 $patchno++;
4794                                 print "<td class=\"link\">" .
4795                                       $cgi->a({-href => href(-anchor=>"patch$patchno")},
4796                                               "patch") .
4797                                       " | " .
4798                                       "</td>\n";
4799                         }
4800
4801                         my $has_history = 0;
4802                         my $not_deleted = 0;
4803                         for (my $i = 0; $i < $diff->{'nparents'}; $i++) {
4804                                 my $hash_parent = $parents[$i];
4805                                 my $from_hash = $diff->{'from_id'}[$i];
4806                                 my $from_path = $diff->{'from_file'}[$i];
4807                                 my $status = $diff->{'status'}[$i];
4808
4809                                 $has_history ||= ($status ne 'A');
4810                                 $not_deleted ||= ($status ne 'D');
4811
4812                                 if ($status eq 'A') {
4813                                         print "<td  class=\"link\" align=\"right\"> | </td>\n";
4814                                 } elsif ($status eq 'D') {
4815                                         print "<td class=\"link\">" .
4816                                               $cgi->a({-href => href(action=>"blob",
4817                                                                      hash_base=>$hash,
4818                                                                      hash=>$from_hash,
4819                                                                      file_name=>$from_path)},
4820                                                       "blob" . ($i+1)) .
4821                                               " | </td>\n";
4822                                 } else {
4823                                         if ($diff->{'to_id'} eq $from_hash) {
4824                                                 print "<td class=\"link nochange\">";
4825                                         } else {
4826                                                 print "<td class=\"link\">";
4827                                         }
4828                                         print $cgi->a({-href => href(action=>"blobdiff",
4829                                                                      hash=>$diff->{'to_id'},
4830                                                                      hash_parent=>$from_hash,
4831                                                                      hash_base=>$hash,
4832                                                                      hash_parent_base=>$hash_parent,
4833                                                                      file_name=>$diff->{'to_file'},
4834                                                                      file_parent=>$from_path)},
4835                                                       "diff" . ($i+1)) .
4836                                               " | </td>\n";
4837                                 }
4838                         }
4839
4840                         print "<td class=\"link\">";
4841                         if ($not_deleted) {
4842                                 print $cgi->a({-href => href(action=>"blob",
4843                                                              hash=>$diff->{'to_id'},
4844                                                              file_name=>$diff->{'to_file'},
4845                                                              hash_base=>$hash)},
4846                                               "blob");
4847                                 print " | " if ($has_history);
4848                         }
4849                         if ($has_history) {
4850                                 print $cgi->a({-href => href(action=>"history",
4851                                                              file_name=>$diff->{'to_file'},
4852                                                              hash_base=>$hash)},
4853                                               "history");
4854                         }
4855                         print "</td>\n";
4856
4857                         print "</tr>\n";
4858                         next; # instead of 'else' clause, to avoid extra indent
4859                 }
4860                 # else ordinary diff
4861
4862                 my ($to_mode_oct, $to_mode_str, $to_file_type);
4863                 my ($from_mode_oct, $from_mode_str, $from_file_type);
4864                 if ($diff->{'to_mode'} ne ('0' x 6)) {
4865                         $to_mode_oct = oct $diff->{'to_mode'};
4866                         if (S_ISREG($to_mode_oct)) { # only for regular file
4867                                 $to_mode_str = sprintf("%04o", $to_mode_oct & 0777); # permission bits
4868                         }
4869                         $to_file_type = file_type($diff->{'to_mode'});
4870                 }
4871                 if ($diff->{'from_mode'} ne ('0' x 6)) {
4872                         $from_mode_oct = oct $diff->{'from_mode'};
4873                         if (S_ISREG($from_mode_oct)) { # only for regular file
4874                                 $from_mode_str = sprintf("%04o", $from_mode_oct & 0777); # permission bits
4875                         }
4876                         $from_file_type = file_type($diff->{'from_mode'});
4877                 }
4878
4879                 if ($diff->{'status'} eq "A") { # created
4880                         my $mode_chng = "<span class=\"file_status new\">[new $to_file_type";
4881                         $mode_chng   .= " with mode: $to_mode_str" if $to_mode_str;
4882                         $mode_chng   .= "]</span>";
4883                         print "<td>";
4884                         print $cgi->a({-href => href(action=>"blob", hash=>$diff->{'to_id'},
4885                                                      hash_base=>$hash, file_name=>$diff->{'file'}),
4886                                       -class => "list"}, esc_path($diff->{'file'}));
4887                         print "</td>\n";
4888                         print "<td>$mode_chng</td>\n";
4889                         print "<td class=\"link\">";
4890                         if ($action eq 'commitdiff') {
4891                                 # link to patch
4892                                 $patchno++;
4893                                 print $cgi->a({-href => href(-anchor=>"patch$patchno")},
4894                                               "patch") .
4895                                       " | ";
4896                         }
4897                         print $cgi->a({-href => href(action=>"blob", hash=>$diff->{'to_id'},
4898                                                      hash_base=>$hash, file_name=>$diff->{'file'})},
4899                                       "blob");
4900                         print "</td>\n";
4901
4902                 } elsif ($diff->{'status'} eq "D") { # deleted
4903                         my $mode_chng = "<span class=\"file_status deleted\">[deleted $from_file_type]</span>";
4904                         print "<td>";
4905                         print $cgi->a({-href => href(action=>"blob", hash=>$diff->{'from_id'},
4906                                                      hash_base=>$parent, file_name=>$diff->{'file'}),
4907                                        -class => "list"}, esc_path($diff->{'file'}));
4908                         print "</td>\n";
4909                         print "<td>$mode_chng</td>\n";
4910                         print "<td class=\"link\">";
4911                         if ($action eq 'commitdiff') {
4912                                 # link to patch
4913                                 $patchno++;
4914                                 print $cgi->a({-href => href(-anchor=>"patch$patchno")},
4915                                               "patch") .
4916                                       " | ";
4917                         }
4918                         print $cgi->a({-href => href(action=>"blob", hash=>$diff->{'from_id'},
4919                                                      hash_base=>$parent, file_name=>$diff->{'file'})},
4920                                       "blob") . " | ";
4921                         if ($have_blame) {
4922                                 print $cgi->a({-href => href(action=>"blame", hash_base=>$parent,
4923                                                              file_name=>$diff->{'file'})},
4924                                               "blame") . " | ";
4925                         }
4926                         print $cgi->a({-href => href(action=>"history", hash_base=>$parent,
4927                                                      file_name=>$diff->{'file'})},
4928                                       "history");
4929                         print "</td>\n";
4930
4931                 } elsif ($diff->{'status'} eq "M" || $diff->{'status'} eq "T") { # modified, or type changed
4932                         my $mode_chnge = "";
4933                         if ($diff->{'from_mode'} != $diff->{'to_mode'}) {
4934                                 $mode_chnge = "<span class=\"file_status mode_chnge\">[changed";
4935                                 if ($from_file_type ne $to_file_type) {
4936                                         $mode_chnge .= " from $from_file_type to $to_file_type";
4937                                 }
4938                                 if (($from_mode_oct & 0777) != ($to_mode_oct & 0777)) {
4939                                         if ($from_mode_str && $to_mode_str) {
4940                                                 $mode_chnge .= " mode: $from_mode_str->$to_mode_str";
4941                                         } elsif ($to_mode_str) {
4942                                                 $mode_chnge .= " mode: $to_mode_str";
4943                                         }
4944                                 }
4945                                 $mode_chnge .= "]</span>\n";
4946                         }
4947                         print "<td>";
4948                         print $cgi->a({-href => href(action=>"blob", hash=>$diff->{'to_id'},
4949                                                      hash_base=>$hash, file_name=>$diff->{'file'}),
4950                                       -class => "list"}, esc_path($diff->{'file'}));
4951                         print "</td>\n";
4952                         print "<td>$mode_chnge</td>\n";
4953                         print "<td class=\"link\">";
4954                         if ($action eq 'commitdiff') {
4955                                 # link to patch
4956                                 $patchno++;
4957                                 print $cgi->a({-href => href(-anchor=>"patch$patchno")},
4958                                               "patch") .
4959                                       " | ";
4960                         } elsif ($diff->{'to_id'} ne $diff->{'from_id'}) {
4961                                 # "commit" view and modified file (not onlu mode changed)
4962                                 print $cgi->a({-href => href(action=>"blobdiff",
4963                                                              hash=>$diff->{'to_id'}, hash_parent=>$diff->{'from_id'},
4964                                                              hash_base=>$hash, hash_parent_base=>$parent,
4965                                                              file_name=>$diff->{'file'})},
4966                                               "diff") .
4967                                       " | ";
4968                         }
4969                         print $cgi->a({-href => href(action=>"blob", hash=>$diff->{'to_id'},
4970                                                      hash_base=>$hash, file_name=>$diff->{'file'})},
4971                                        "blob") . " | ";
4972                         if ($have_blame) {
4973                                 print $cgi->a({-href => href(action=>"blame", hash_base=>$hash,
4974                                                              file_name=>$diff->{'file'})},
4975                                               "blame") . " | ";
4976                         }
4977                         print $cgi->a({-href => href(action=>"history", hash_base=>$hash,
4978                                                      file_name=>$diff->{'file'})},
4979                                       "history");
4980                         print "</td>\n";
4981
4982                 } elsif ($diff->{'status'} eq "R" || $diff->{'status'} eq "C") { # renamed or copied
4983                         my %status_name = ('R' => 'moved', 'C' => 'copied');
4984                         my $nstatus = $status_name{$diff->{'status'}};
4985                         my $mode_chng = "";
4986                         if ($diff->{'from_mode'} != $diff->{'to_mode'}) {
4987                                 # mode also for directories, so we cannot use $to_mode_str
4988                                 $mode_chng = sprintf(", mode: %04o", $to_mode_oct & 0777);
4989                         }
4990                         print "<td>" .
4991                               $cgi->a({-href => href(action=>"blob", hash_base=>$hash,
4992                                                      hash=>$diff->{'to_id'}, file_name=>$diff->{'to_file'}),
4993                                       -class => "list"}, esc_path($diff->{'to_file'})) . "</td>\n" .
4994                               "<td><span class=\"file_status $nstatus\">[$nstatus from " .
4995                               $cgi->a({-href => href(action=>"blob", hash_base=>$parent,
4996                                                      hash=>$diff->{'from_id'}, file_name=>$diff->{'from_file'}),
4997                                       -class => "list"}, esc_path($diff->{'from_file'})) .
4998                               " with " . (int $diff->{'similarity'}) . "% similarity$mode_chng]</span></td>\n" .
4999                               "<td class=\"link\">";
5000                         if ($action eq 'commitdiff') {
5001                                 # link to patch
5002                                 $patchno++;
5003                                 print $cgi->a({-href => href(-anchor=>"patch$patchno")},
5004                                               "patch") .
5005                                       " | ";
5006                         } elsif ($diff->{'to_id'} ne $diff->{'from_id'}) {
5007                                 # "commit" view and modified file (not only pure rename or copy)
5008                                 print $cgi->a({-href => href(action=>"blobdiff",
5009                                                              hash=>$diff->{'to_id'}, hash_parent=>$diff->{'from_id'},
5010                                                              hash_base=>$hash, hash_parent_base=>$parent,
5011                                                              file_name=>$diff->{'to_file'}, file_parent=>$diff->{'from_file'})},
5012                                               "diff") .
5013                                       " | ";
5014                         }
5015                         print $cgi->a({-href => href(action=>"blob", hash=>$diff->{'to_id'},
5016                                                      hash_base=>$parent, file_name=>$diff->{'to_file'})},
5017                                       "blob") . " | ";
5018                         if ($have_blame) {
5019                                 print $cgi->a({-href => href(action=>"blame", hash_base=>$hash,
5020                                                              file_name=>$diff->{'to_file'})},
5021                                               "blame") . " | ";
5022                         }
5023                         print $cgi->a({-href => href(action=>"history", hash_base=>$hash,
5024                                                     file_name=>$diff->{'to_file'})},
5025                                       "history");
5026                         print "</td>\n";
5027
5028                 } # we should not encounter Unmerged (U) or Unknown (X) status
5029                 print "</tr>\n";
5030         }
5031         print "</tbody>" if $has_header;
5032         print "</table>\n";
5033 }
5034
5035 # Print context lines and then rem/add lines in a side-by-side manner.
5036 sub print_sidebyside_diff_lines {
5037         my ($ctx, $rem, $add) = @_;
5038
5039         # print context block before add/rem block
5040         if (@$ctx) {
5041                 print join '',
5042                         '<div class="chunk_block ctx">',
5043                                 '<div class="old">',
5044                                 @$ctx,
5045                                 '</div>',
5046                                 '<div class="new">',
5047                                 @$ctx,
5048                                 '</div>',
5049                         '</div>';
5050         }
5051
5052         if (!@$add) {
5053                 # pure removal
5054                 print join '',
5055                         '<div class="chunk_block rem">',
5056                                 '<div class="old">',
5057                                 @$rem,
5058                                 '</div>',
5059                         '</div>';
5060         } elsif (!@$rem) {
5061                 # pure addition
5062                 print join '',
5063                         '<div class="chunk_block add">',
5064                                 '<div class="new">',
5065                                 @$add,
5066                                 '</div>',
5067                         '</div>';
5068         } else {
5069                 print join '',
5070                         '<div class="chunk_block chg">',
5071                                 '<div class="old">',
5072                                 @$rem,
5073                                 '</div>',
5074                                 '<div class="new">',
5075                                 @$add,
5076                                 '</div>',
5077                         '</div>';
5078         }
5079 }
5080
5081 # Print context lines and then rem/add lines in inline manner.
5082 sub print_inline_diff_lines {
5083         my ($ctx, $rem, $add) = @_;
5084
5085         print @$ctx, @$rem, @$add;
5086 }
5087
5088 # Format removed and added line, mark changed part and HTML-format them.
5089 # Implementation is based on contrib/diff-highlight
5090 sub format_rem_add_lines_pair {
5091         my ($rem, $add, $num_parents) = @_;
5092
5093         # We need to untabify lines before split()'ing them;
5094         # otherwise offsets would be invalid.
5095         chomp $rem;
5096         chomp $add;
5097         $rem = untabify($rem);
5098         $add = untabify($add);
5099
5100         my @rem = split(//, $rem);
5101         my @add = split(//, $add);
5102         my ($esc_rem, $esc_add);
5103         # Ignore leading +/- characters for each parent.
5104         my ($prefix_len, $suffix_len) = ($num_parents, 0);
5105         my ($prefix_has_nonspace, $suffix_has_nonspace);
5106
5107         my $shorter = (@rem < @add) ? @rem : @add;
5108         while ($prefix_len < $shorter) {
5109                 last if ($rem[$prefix_len] ne $add[$prefix_len]);
5110
5111                 $prefix_has_nonspace = 1 if ($rem[$prefix_len] !~ /\s/);
5112                 $prefix_len++;
5113         }
5114
5115         while ($prefix_len + $suffix_len < $shorter) {
5116                 last if ($rem[-1 - $suffix_len] ne $add[-1 - $suffix_len]);
5117
5118                 $suffix_has_nonspace = 1 if ($rem[-1 - $suffix_len] !~ /\s/);
5119                 $suffix_len++;
5120         }
5121
5122         # Mark lines that are different from each other, but have some common
5123         # part that isn't whitespace.  If lines are completely different, don't
5124         # mark them because that would make output unreadable, especially if
5125         # diff consists of multiple lines.
5126         if ($prefix_has_nonspace || $suffix_has_nonspace) {
5127                 $esc_rem = esc_html_hl_regions($rem, 'marked',
5128                         [$prefix_len, @rem - $suffix_len], -nbsp=>1);
5129                 $esc_add = esc_html_hl_regions($add, 'marked',
5130                         [$prefix_len, @add - $suffix_len], -nbsp=>1);
5131         } else {
5132                 $esc_rem = esc_html($rem, -nbsp=>1);
5133                 $esc_add = esc_html($add, -nbsp=>1);
5134         }
5135
5136         return format_diff_line(\$esc_rem, 'rem'),
5137                format_diff_line(\$esc_add, 'add');
5138 }
5139
5140 # HTML-format diff context, removed and added lines.
5141 sub format_ctx_rem_add_lines {
5142         my ($ctx, $rem, $add, $num_parents) = @_;
5143         my (@new_ctx, @new_rem, @new_add);
5144         my $can_highlight = 0;
5145         my $is_combined = ($num_parents > 1);
5146
5147         # Highlight if every removed line has a corresponding added line.
5148         if (@$add > 0 && @$add == @$rem) {
5149                 $can_highlight = 1;
5150
5151                 # Highlight lines in combined diff only if the chunk contains
5152                 # diff between the same version, e.g.
5153                 #
5154                 #    - a
5155                 #   -  b
5156                 #    + c
5157                 #   +  d
5158                 #
5159                 # Otherwise the highlightling would be confusing.
5160                 if ($is_combined) {
5161                         for (my $i = 0; $i < @$add; $i++) {
5162                                 my $prefix_rem = substr($rem->[$i], 0, $num_parents);
5163                                 my $prefix_add = substr($add->[$i], 0, $num_parents);
5164
5165                                 $prefix_rem =~ s/-/+/g;
5166
5167                                 if ($prefix_rem ne $prefix_add) {
5168                                         $can_highlight = 0;
5169                                         last;
5170                                 }
5171                         }
5172                 }
5173         }
5174
5175         if ($can_highlight) {
5176                 for (my $i = 0; $i < @$add; $i++) {
5177                         my ($line_rem, $line_add) = format_rem_add_lines_pair(
5178                                 $rem->[$i], $add->[$i], $num_parents);
5179                         push @new_rem, $line_rem;
5180                         push @new_add, $line_add;
5181                 }
5182         } else {
5183                 @new_rem = map { format_diff_line($_, 'rem') } @$rem;
5184                 @new_add = map { format_diff_line($_, 'add') } @$add;
5185         }
5186
5187         @new_ctx = map { format_diff_line($_, 'ctx') } @$ctx;
5188
5189         return (\@new_ctx, \@new_rem, \@new_add);
5190 }
5191
5192 # Print context lines and then rem/add lines.
5193 sub print_diff_lines {
5194         my ($ctx, $rem, $add, $diff_style, $num_parents) = @_;
5195         my $is_combined = $num_parents > 1;
5196
5197         ($ctx, $rem, $add) = format_ctx_rem_add_lines($ctx, $rem, $add,
5198                 $num_parents);
5199
5200         if ($diff_style eq 'sidebyside' && !$is_combined) {
5201                 print_sidebyside_diff_lines($ctx, $rem, $add);
5202         } else {
5203                 # default 'inline' style and unknown styles
5204                 print_inline_diff_lines($ctx, $rem, $add);
5205         }
5206 }
5207
5208 sub print_diff_chunk {
5209         my ($diff_style, $num_parents, $from, $to, @chunk) = @_;
5210         my (@ctx, @rem, @add);
5211
5212         # The class of the previous line.
5213         my $prev_class = '';
5214
5215         return unless @chunk;
5216
5217         # incomplete last line might be among removed or added lines,
5218         # or both, or among context lines: find which
5219         for (my $i = 1; $i < @chunk; $i++) {
5220                 if ($chunk[$i][0] eq 'incomplete') {
5221                         $chunk[$i][0] = $chunk[$i-1][0];
5222                 }
5223         }
5224
5225         # guardian
5226         push @chunk, ["", ""];
5227
5228         foreach my $line_info (@chunk) {
5229                 my ($class, $line) = @$line_info;
5230
5231                 # print chunk headers
5232                 if ($class && $class eq 'chunk_header') {
5233                         print format_diff_line($line, $class, $from, $to);
5234                         next;
5235                 }
5236
5237                 ## print from accumulator when have some add/rem lines or end
5238                 # of chunk (flush context lines), or when have add and rem
5239                 # lines and new block is reached (otherwise add/rem lines could
5240                 # be reordered)
5241                 if (!$class || ((@rem || @add) && $class eq 'ctx') ||
5242                     (@rem && @add && $class ne $prev_class)) {
5243                         print_diff_lines(\@ctx, \@rem, \@add,
5244                                          $diff_style, $num_parents);
5245                         @ctx = @rem = @add = ();
5246                 }
5247
5248                 ## adding lines to accumulator
5249                 # guardian value
5250                 last unless $line;
5251                 # rem, add or change
5252                 if ($class eq 'rem') {
5253                         push @rem, $line;
5254                 } elsif ($class eq 'add') {
5255                         push @add, $line;
5256                 }
5257                 # context line
5258                 if ($class eq 'ctx') {
5259                         push @ctx, $line;
5260                 }
5261
5262                 $prev_class = $class;
5263         }
5264 }
5265
5266 sub git_patchset_body {
5267         my ($fd, $diff_style, $difftree, $hash, @hash_parents) = @_;
5268         my ($hash_parent) = $hash_parents[0];
5269
5270         my $is_combined = (@hash_parents > 1);
5271         my $patch_idx = 0;
5272         my $patch_number = 0;
5273         my $patch_line;
5274         my $diffinfo;
5275         my $to_name;
5276         my (%from, %to);
5277         my @chunk; # for side-by-side diff
5278
5279         print "<div class=\"patchset\">\n";
5280
5281         # skip to first patch
5282         while ($patch_line = <$fd>) {
5283                 chomp $patch_line;
5284
5285                 last if ($patch_line =~ m/^diff /);
5286         }
5287
5288  PATCH:
5289         while ($patch_line) {
5290
5291                 # parse "git diff" header line
5292                 if ($patch_line =~ m/^diff --git (\"(?:[^\\\"]*(?:\\.[^\\\"]*)*)\"|[^ "]*) (.*)$/) {
5293                         # $1 is from_name, which we do not use
5294                         $to_name = unquote($2);
5295                         $to_name =~ s!^b/!!;
5296                 } elsif ($patch_line =~ m/^diff --(cc|combined) ("?.*"?)$/) {
5297                         # $1 is 'cc' or 'combined', which we do not use
5298                         $to_name = unquote($2);
5299                 } else {
5300                         $to_name = undef;
5301                 }
5302
5303                 # check if current patch belong to current raw line
5304                 # and parse raw git-diff line if needed
5305                 if (is_patch_split($diffinfo, { 'to_file' => $to_name })) {
5306                         # this is continuation of a split patch
5307                         print "<div class=\"patch cont\">\n";
5308                 } else {
5309                         # advance raw git-diff output if needed
5310                         $patch_idx++ if defined $diffinfo;
5311
5312                         # read and prepare patch information
5313                         $diffinfo = parsed_difftree_line($difftree->[$patch_idx]);
5314
5315                         # compact combined diff output can have some patches skipped
5316                         # find which patch (using pathname of result) we are at now;
5317                         if ($is_combined) {
5318                                 while ($to_name ne $diffinfo->{'to_file'}) {
5319                                         print "<div class=\"patch\" id=\"patch". ($patch_idx+1) ."\">\n" .
5320                                               format_diff_cc_simplified($diffinfo, @hash_parents) .
5321                                               "</div>\n";  # class="patch"
5322
5323                                         $patch_idx++;
5324                                         $patch_number++;
5325
5326                                         last if $patch_idx > $#$difftree;
5327                                         $diffinfo = parsed_difftree_line($difftree->[$patch_idx]);
5328                                 }
5329                         }
5330
5331                         # modifies %from, %to hashes
5332                         parse_from_to_diffinfo($diffinfo, \%from, \%to, @hash_parents);
5333
5334                         # this is first patch for raw difftree line with $patch_idx index
5335                         # we index @$difftree array from 0, but number patches from 1
5336                         print "<div class=\"patch\" id=\"patch". ($patch_idx+1) ."\">\n";
5337                 }
5338
5339                 # git diff header
5340                 #assert($patch_line =~ m/^diff /) if DEBUG;
5341                 #assert($patch_line !~ m!$/$!) if DEBUG; # is chomp-ed
5342                 $patch_number++;
5343                 # print "git diff" header
5344                 print format_git_diff_header_line($patch_line, $diffinfo,
5345                                                   \%from, \%to);
5346
5347                 # print extended diff header
5348                 print "<div class=\"diff extended_header\">\n";
5349         EXTENDED_HEADER:
5350                 while ($patch_line = <$fd>) {
5351                         chomp $patch_line;
5352
5353                         last EXTENDED_HEADER if ($patch_line =~ m/^--- |^diff /);
5354
5355                         print format_extended_diff_header_line($patch_line, $diffinfo,
5356                                                                \%from, \%to);
5357                 }
5358                 print "</div>\n"; # class="diff extended_header"
5359
5360                 # from-file/to-file diff header
5361                 if (! $patch_line) {
5362                         print "</div>\n"; # class="patch"
5363                         last PATCH;
5364                 }
5365                 next PATCH if ($patch_line =~ m/^diff /);
5366                 #assert($patch_line =~ m/^---/) if DEBUG;
5367
5368                 my $last_patch_line = $patch_line;
5369                 $patch_line = <$fd>;
5370                 chomp $patch_line;
5371                 #assert($patch_line =~ m/^\+\+\+/) if DEBUG;
5372
5373                 print format_diff_from_to_header($last_patch_line, $patch_line,
5374                                                  $diffinfo, \%from, \%to,
5375                                                  @hash_parents);
5376
5377                 # the patch itself
5378         LINE:
5379                 while ($patch_line = <$fd>) {
5380                         chomp $patch_line;
5381
5382                         next PATCH if ($patch_line =~ m/^diff /);
5383
5384                         my $class = diff_line_class($patch_line, \%from, \%to);
5385
5386                         if ($class eq 'chunk_header') {
5387                                 print_diff_chunk($diff_style, scalar @hash_parents, \%from, \%to, @chunk);
5388                                 @chunk = ();
5389                         }
5390
5391                         push @chunk, [ $class, $patch_line ];
5392                 }
5393
5394         } continue {
5395                 if (@chunk) {
5396                         print_diff_chunk($diff_style, scalar @hash_parents, \%from, \%to, @chunk);
5397                         @chunk = ();
5398                 }
5399                 print "</div>\n"; # class="patch"
5400         }
5401
5402         # for compact combined (--cc) format, with chunk and patch simplification
5403         # the patchset might be empty, but there might be unprocessed raw lines
5404         for (++$patch_idx if $patch_number > 0;
5405              $patch_idx < @$difftree;
5406              ++$patch_idx) {
5407                 # read and prepare patch information
5408                 $diffinfo = parsed_difftree_line($difftree->[$patch_idx]);
5409
5410                 # generate anchor for "patch" links in difftree / whatchanged part
5411                 print "<div class=\"patch\" id=\"patch". ($patch_idx+1) ."\">\n" .
5412                       format_diff_cc_simplified($diffinfo, @hash_parents) .
5413                       "</div>\n";  # class="patch"
5414
5415                 $patch_number++;
5416         }
5417
5418         if ($patch_number == 0) {
5419                 if (@hash_parents > 1) {
5420                         print "<div class=\"diff nodifferences\">Trivial merge</div>\n";
5421                 } else {
5422                         print "<div class=\"diff nodifferences\">No differences found</div>\n";
5423                 }
5424         }
5425
5426         print "</div>\n"; # class="patchset"
5427 }
5428
5429 # . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
5430
5431 sub git_project_search_form {
5432         my ($searchtext, $search_use_regexp) = @_;
5433
5434         my $limit = '';
5435         if ($project_filter) {
5436                 $limit = " in '$project_filter/'";
5437         }
5438
5439         print "<div class=\"projsearch\">\n";
5440         print $cgi->startform(-method => 'get', -action => $my_uri) .
5441               $cgi->hidden(-name => 'a', -value => 'project_list')  . "\n";
5442         print $cgi->hidden(-name => 'pf', -value => $project_filter). "\n"
5443                 if (defined $project_filter);
5444         print $cgi->textfield(-name => 's', -value => $searchtext,
5445                               -title => "Search project by name and description$limit",
5446                               -size => 60) . "\n" .
5447               "<span title=\"Extended regular expression\">" .
5448               $cgi->checkbox(-name => 'sr', -value => 1, -label => 're',
5449                              -checked => $search_use_regexp) .
5450               "</span>\n" .
5451               $cgi->submit(-name => 'btnS', -value => 'Search') .
5452               $cgi->end_form() . "\n" .
5453               $cgi->a({-href => href(project => undef, searchtext => undef,
5454                                      project_filter => $project_filter)},
5455                       esc_html("List all projects$limit")) . "<br />\n";
5456         print "</div>\n";
5457 }
5458
5459 # entry for given @keys needs filling if at least one of keys in list
5460 # is not present in %$project_info
5461 sub project_info_needs_filling {
5462         my ($project_info, @keys) = @_;
5463
5464         # return List::MoreUtils::any { !exists $project_info->{$_} } @keys;
5465         foreach my $key (@keys) {
5466                 if (!exists $project_info->{$key}) {
5467                         return 1;
5468                 }
5469         }
5470         return;
5471 }
5472
5473 # fills project list info (age, description, owner, category, forks, etc.)
5474 # for each project in the list, removing invalid projects from
5475 # returned list, or fill only specified info.
5476 #
5477 # Invalid projects are removed from the returned list if and only if you
5478 # ask 'age' or 'age_string' to be filled, because they are the only fields
5479 # that run unconditionally git command that requires repository, and
5480 # therefore do always check if project repository is invalid.
5481 #
5482 # USAGE:
5483 # * fill_project_list_info(\@project_list, 'descr_long', 'ctags')
5484 #   ensures that 'descr_long' and 'ctags' fields are filled
5485 # * @project_list = fill_project_list_info(\@project_list)
5486 #   ensures that all fields are filled (and invalid projects removed)
5487 #
5488 # NOTE: modifies $projlist, but does not remove entries from it
5489 sub fill_project_list_info {
5490         my ($projlist, @wanted_keys) = @_;
5491         my @projects;
5492         my $filter_set = sub { return @_; };
5493         if (@wanted_keys) {
5494                 my %wanted_keys = map { $_ => 1 } @wanted_keys;
5495                 $filter_set = sub { return grep { $wanted_keys{$_} } @_; };
5496         }
5497
5498         my $show_ctags = gitweb_check_feature('ctags');
5499  PROJECT:
5500         foreach my $pr (@$projlist) {
5501                 if (project_info_needs_filling($pr, $filter_set->('age', 'age_string'))) {
5502                         my (@activity) = git_get_last_activity($pr->{'path'});
5503                         unless (@activity) {
5504                                 next PROJECT;
5505                         }
5506                         ($pr->{'age'}, $pr->{'age_string'}) = @activity;
5507                 }
5508                 if (project_info_needs_filling($pr, $filter_set->('descr', 'descr_long'))) {
5509                         my $descr = git_get_project_description($pr->{'path'}) || "";
5510                         $descr = to_utf8($descr);
5511                         $pr->{'descr_long'} = $descr;
5512                         $pr->{'descr'} = chop_str($descr, $projects_list_description_width, 5);
5513                 }
5514                 if (project_info_needs_filling($pr, $filter_set->('owner'))) {
5515                         $pr->{'owner'} = git_get_project_owner("$pr->{'path'}") || "";
5516                 }
5517                 if ($show_ctags &&
5518                     project_info_needs_filling($pr, $filter_set->('ctags'))) {
5519                         $pr->{'ctags'} = git_get_project_ctags($pr->{'path'});
5520                 }
5521                 if ($projects_list_group_categories &&
5522                     project_info_needs_filling($pr, $filter_set->('category'))) {
5523                         my $cat = git_get_project_category($pr->{'path'}) ||
5524                                                            $project_list_default_category;
5525                         $pr->{'category'} = to_utf8($cat);
5526                 }
5527
5528                 push @projects, $pr;
5529         }
5530
5531         return @projects;
5532 }
5533
5534 sub sort_projects_list {
5535         my ($projlist, $order) = @_;
5536
5537         sub order_str {
5538                 my $key = shift;
5539                 return sub { $a->{$key} cmp $b->{$key} };
5540         }
5541
5542         sub order_num_then_undef {
5543                 my $key = shift;
5544                 return sub {
5545                         defined $a->{$key} ?
5546                                 (defined $b->{$key} ? $a->{$key} <=> $b->{$key} : -1) :
5547                                 (defined $b->{$key} ? 1 : 0)
5548                 };
5549         }
5550
5551         my %orderings = (
5552                 project => order_str('path'),
5553                 descr => order_str('descr_long'),
5554                 owner => order_str('owner'),
5555                 age => order_num_then_undef('age'),
5556         );
5557
5558         my $ordering = $orderings{$order};
5559         return defined $ordering ? sort $ordering @$projlist : @$projlist;
5560 }
5561
5562 # returns a hash of categories, containing the list of project
5563 # belonging to each category
5564 sub build_projlist_by_category {
5565         my ($projlist, $from, $to) = @_;
5566         my %categories;
5567
5568         $from = 0 unless defined $from;
5569         $to = $#$projlist if (!defined $to || $#$projlist < $to);
5570
5571         for (my $i = $from; $i <= $to; $i++) {
5572                 my $pr = $projlist->[$i];
5573                 push @{$categories{ $pr->{'category'} }}, $pr;
5574         }
5575
5576         return wantarray ? %categories : \%categories;
5577 }
5578
5579 # print 'sort by' <th> element, generating 'sort by $name' replay link
5580 # if that order is not selected
5581 sub print_sort_th {
5582         print format_sort_th(@_);
5583 }
5584
5585 sub format_sort_th {
5586         my ($name, $order, $header) = @_;
5587         my $sort_th = "";
5588         $header ||= ucfirst($name);
5589
5590         if ($order eq $name) {
5591                 $sort_th .= "<th>$header</th>\n";
5592         } else {
5593                 $sort_th .= "<th>" .
5594                             $cgi->a({-href => href(-replay=>1, order=>$name),
5595                                      -class => "header"}, $header) .
5596                             "</th>\n";
5597         }
5598
5599         return $sort_th;
5600 }
5601
5602 sub git_project_list_rows {
5603         my ($projlist, $from, $to, $check_forks) = @_;
5604
5605         $from = 0 unless defined $from;
5606         $to = $#$projlist if (!defined $to || $#$projlist < $to);
5607
5608         my $alternate = 1;
5609         for (my $i = $from; $i <= $to; $i++) {
5610                 my $pr = $projlist->[$i];
5611
5612                 if ($alternate) {
5613                         print "<tr class=\"dark\">\n";
5614                 } else {
5615                         print "<tr class=\"light\">\n";
5616                 }
5617                 $alternate ^= 1;
5618
5619                 if ($check_forks) {
5620                         print "<td>";
5621                         if ($pr->{'forks'}) {
5622                                 my $nforks = scalar @{$pr->{'forks'}};
5623                                 if ($nforks > 0) {
5624                                         print $cgi->a({-href => href(project=>$pr->{'path'}, action=>"forks"),
5625                                                        -title => "$nforks forks"}, "+");
5626                                 } else {
5627                                         print $cgi->span({-title => "$nforks forks"}, "+");
5628                                 }
5629                         }
5630                         print "</td>\n";
5631                 }
5632                 print "<td>" . $cgi->a({-href => href(project=>$pr->{'path'}, action=>"summary"),
5633                                         -class => "list"},
5634                                        esc_html_match_hl($pr->{'path'}, $search_regexp)) .
5635                       "</td>\n" .
5636                       "<td>" . $cgi->a({-href => href(project=>$pr->{'path'}, action=>"summary"),
5637                                         -class => "list",
5638                                         -title => $pr->{'descr_long'}},
5639                                         $search_regexp
5640                                         ? esc_html_match_hl_chopped($pr->{'descr_long'},
5641                                                                     $pr->{'descr'}, $search_regexp)
5642                                         : esc_html($pr->{'descr'})) .
5643                       "</td>\n";
5644                 unless ($omit_owner) {
5645                         print "<td><i>" . chop_and_escape_str($pr->{'owner'}, 15) . "</i></td>\n";
5646                 }
5647                 unless ($omit_age_column) {
5648                         print "<td class=\"". age_class($pr->{'age'}) . "\">" .
5649                             (defined $pr->{'age_string'} ? $pr->{'age_string'} : "No commits") . "</td>\n";
5650                 }
5651                 print"<td class=\"link\">" .
5652                       $cgi->a({-href => href(project=>$pr->{'path'}, action=>"summary")}, "summary")   . " | " .
5653                       $cgi->a({-href => href(project=>$pr->{'path'}, action=>"shortlog")}, "shortlog") . " | " .
5654                       $cgi->a({-href => href(project=>$pr->{'path'}, action=>"log")}, "log") . " | " .
5655                       $cgi->a({-href => href(project=>$pr->{'path'}, action=>"tree")}, "tree") .
5656                       ($pr->{'forks'} ? " | " . $cgi->a({-href => href(project=>$pr->{'path'}, action=>"forks")}, "forks") : '') .
5657                       "</td>\n" .
5658                       "</tr>\n";
5659         }
5660 }
5661
5662 sub git_project_list_body {
5663         # actually uses global variable $project
5664         my ($projlist, $order, $from, $to, $extra, $no_header) = @_;
5665         my @projects = @$projlist;
5666
5667         my $check_forks = gitweb_check_feature('forks');
5668         my $show_ctags  = gitweb_check_feature('ctags');
5669         my $tagfilter = $show_ctags ? $input_params{'ctag'} : undef;
5670         $check_forks = undef
5671                 if ($tagfilter || $search_regexp);
5672
5673         # filtering out forks before filling info allows to do less work
5674         @projects = filter_forks_from_projects_list(\@projects)
5675                 if ($check_forks);
5676         # search_projects_list pre-fills required info
5677         @projects = search_projects_list(\@projects,
5678                                          'search_regexp' => $search_regexp,
5679                                          'tagfilter'  => $tagfilter)
5680                 if ($tagfilter || $search_regexp);
5681         # fill the rest
5682         my @all_fields = ('descr', 'descr_long', 'ctags', 'category');
5683         push @all_fields, ('age', 'age_string') unless($omit_age_column);
5684         push @all_fields, 'owner' unless($omit_owner);
5685         @projects = fill_project_list_info(\@projects, @all_fields);
5686
5687         $order ||= $default_projects_order;
5688         $from = 0 unless defined $from;
5689         $to = $#projects if (!defined $to || $#projects < $to);
5690
5691         # short circuit
5692         if ($from > $to) {
5693                 print "<center>\n".
5694                       "<b>No such projects found</b><br />\n".
5695                       "Click ".$cgi->a({-href=>href(project=>undef)},"here")." to view all projects<br />\n".
5696                       "</center>\n<br />\n";
5697                 return;
5698         }
5699
5700         @projects = sort_projects_list(\@projects, $order);
5701
5702         if ($show_ctags) {
5703                 my $ctags = git_gather_all_ctags(\@projects);
5704                 my $cloud = git_populate_project_tagcloud($ctags);
5705                 print git_show_project_tagcloud($cloud, 64);
5706         }
5707
5708         print "<table class=\"project_list\">\n";
5709         unless ($no_header) {
5710                 print "<tr>\n";
5711                 if ($check_forks) {
5712                         print "<th></th>\n";
5713                 }
5714                 print_sort_th('project', $order, 'Project');
5715                 print_sort_th('descr', $order, 'Description');
5716                 print_sort_th('owner', $order, 'Owner') unless $omit_owner;
5717                 print_sort_th('age', $order, 'Last Change') unless $omit_age_column;
5718                 print "<th></th>\n" . # for links
5719                       "</tr>\n";
5720         }
5721
5722         if ($projects_list_group_categories) {
5723                 # only display categories with projects in the $from-$to window
5724                 @projects = sort {$a->{'category'} cmp $b->{'category'}} @projects[$from..$to];
5725                 my %categories = build_projlist_by_category(\@projects, $from, $to);
5726                 foreach my $cat (sort keys %categories) {
5727                         unless ($cat eq "") {
5728                                 print "<tr>\n";
5729                                 if ($check_forks) {
5730                                         print "<td></td>\n";
5731                                 }
5732                                 print "<td class=\"category\" colspan=\"5\">".esc_html($cat)."</td>\n";
5733                                 print "</tr>\n";
5734                         }
5735
5736                         git_project_list_rows($categories{$cat}, undef, undef, $check_forks);
5737                 }
5738         } else {
5739                 git_project_list_rows(\@projects, $from, $to, $check_forks);
5740         }
5741
5742         if (defined $extra) {
5743                 print "<tr>\n";
5744                 if ($check_forks) {
5745                         print "<td></td>\n";
5746                 }
5747                 print "<td colspan=\"5\">$extra</td>\n" .
5748                       "</tr>\n";
5749         }
5750         print "</table>\n";
5751 }
5752
5753 sub git_log_body {
5754         # uses global variable $project
5755         my ($commitlist, $from, $to, $refs, $extra) = @_;
5756
5757         $from = 0 unless defined $from;
5758         $to = $#{$commitlist} if (!defined $to || $#{$commitlist} < $to);
5759
5760         for (my $i = 0; $i <= $to; $i++) {
5761                 my %co = %{$commitlist->[$i]};
5762                 next if !%co;
5763                 my $commit = $co{'id'};
5764                 my $ref = format_ref_marker($refs, $commit);
5765                 git_print_header_div('commit',
5766                                "<span class=\"age\">$co{'age_string'}</span>" .
5767                                esc_html($co{'title'}) . $ref,
5768                                $commit);
5769                 print "<div class=\"title_text\">\n" .
5770                       "<div class=\"log_link\">\n" .
5771                       $cgi->a({-href => href(action=>"commit", hash=>$commit)}, "commit") .
5772                       " | " .
5773                       $cgi->a({-href => href(action=>"commitdiff", hash=>$commit)}, "commitdiff") .
5774                       " | " .
5775                       $cgi->a({-href => href(action=>"tree", hash=>$commit, hash_base=>$commit)}, "tree") .
5776                       "<br/>\n" .
5777                       "</div>\n";
5778                       git_print_authorship(\%co, -tag => 'span');
5779                       print "<br/>\n</div>\n";
5780
5781                 print "<div class=\"log_body\">\n";
5782                 git_print_log($co{'comment'}, -final_empty_line=> 1);
5783                 print "</div>\n";
5784         }
5785         if ($extra) {
5786                 print "<div class=\"page_nav\">\n";
5787                 print "$extra\n";
5788                 print "</div>\n";
5789         }
5790 }
5791
5792 sub git_shortlog_body {
5793         # uses global variable $project
5794         my ($commitlist, $from, $to, $refs, $extra) = @_;
5795
5796         $from = 0 unless defined $from;
5797         $to = $#{$commitlist} if (!defined $to || $#{$commitlist} < $to);
5798
5799         print "<table class=\"shortlog\">\n";
5800         my $alternate = 1;
5801         for (my $i = $from; $i <= $to; $i++) {
5802                 my %co = %{$commitlist->[$i]};
5803                 my $commit = $co{'id'};
5804                 my $ref = format_ref_marker($refs, $commit);
5805                 if ($alternate) {
5806                         print "<tr class=\"dark\">\n";
5807                 } else {
5808                         print "<tr class=\"light\">\n";
5809                 }
5810                 $alternate ^= 1;
5811                 # git_summary() used print "<td><i>$co{'age_string'}</i></td>\n" .
5812                 print "<td title=\"$co{'age_string_age'}\"><i>$co{'age_string_date'}</i></td>\n" .
5813                       format_author_html('td', \%co, 10) . "<td>";
5814                 print format_subject_html($co{'title'}, $co{'title_short'},
5815                                           href(action=>"commit", hash=>$commit), $ref);
5816                 print "</td>\n" .
5817                       "<td class=\"link\">" .
5818                       $cgi->a({-href => href(action=>"commit", hash=>$commit)}, "commit") . " | " .
5819                       $cgi->a({-href => href(action=>"commitdiff", hash=>$commit)}, "commitdiff") . " | " .
5820                       $cgi->a({-href => href(action=>"tree", hash=>$commit, hash_base=>$commit)}, "tree");
5821                 my $snapshot_links = format_snapshot_links($commit);
5822                 if (defined $snapshot_links) {
5823                         print " | " . $snapshot_links;
5824                 }
5825                 print "</td>\n" .
5826                       "</tr>\n";
5827         }
5828         if (defined $extra) {
5829                 print "<tr>\n" .
5830                       "<td colspan=\"4\">$extra</td>\n" .
5831                       "</tr>\n";
5832         }
5833         print "</table>\n";
5834 }
5835
5836 sub git_history_body {
5837         # Warning: assumes constant type (blob or tree) during history
5838         my ($commitlist, $from, $to, $refs, $extra,
5839             $file_name, $file_hash, $ftype) = @_;
5840
5841         $from = 0 unless defined $from;
5842         $to = $#{$commitlist} unless (defined $to && $to <= $#{$commitlist});
5843
5844         print "<table class=\"history\">\n";
5845         my $alternate = 1;
5846         for (my $i = $from; $i <= $to; $i++) {
5847                 my %co = %{$commitlist->[$i]};
5848                 if (!%co) {
5849                         next;
5850                 }
5851                 my $commit = $co{'id'};
5852
5853                 my $ref = format_ref_marker($refs, $commit);
5854
5855                 if ($alternate) {
5856                         print "<tr class=\"dark\">\n";
5857                 } else {
5858                         print "<tr class=\"light\">\n";
5859                 }
5860                 $alternate ^= 1;
5861                 print "<td title=\"$co{'age_string_age'}\"><i>$co{'age_string_date'}</i></td>\n" .
5862         # shortlog:   format_author_html('td', \%co, 10)
5863                       format_author_html('td', \%co, 15, 3) . "<td>";
5864                 # originally git_history used chop_str($co{'title'}, 50)
5865                 print format_subject_html($co{'title'}, $co{'title_short'},
5866                                           href(action=>"commit", hash=>$commit), $ref);
5867                 print "</td>\n" .
5868                       "<td class=\"link\">" .
5869                       $cgi->a({-href => href(action=>$ftype, hash_base=>$commit, file_name=>$file_name)}, $ftype) . " | " .
5870                       $cgi->a({-href => href(action=>"commitdiff", hash=>$commit)}, "commitdiff");
5871
5872                 if ($ftype eq 'blob') {
5873                         my $blob_current = $file_hash;
5874                         my $blob_parent  = git_get_hash_by_path($commit, $file_name);
5875                         if (defined $blob_current && defined $blob_parent &&
5876                                         $blob_current ne $blob_parent) {
5877                                 print " | " .
5878                                         $cgi->a({-href => href(action=>"blobdiff",
5879                                                                hash=>$blob_current, hash_parent=>$blob_parent,
5880                                                                hash_base=>$hash_base, hash_parent_base=>$commit,
5881                                                                file_name=>$file_name)},
5882                                                 "diff to current");
5883                         }
5884                 }
5885                 print "</td>\n" .
5886                       "</tr>\n";
5887         }
5888         if (defined $extra) {
5889                 print "<tr>\n" .
5890                       "<td colspan=\"4\">$extra</td>\n" .
5891                       "</tr>\n";
5892         }
5893         print "</table>\n";
5894 }
5895
5896 sub git_tags_body {
5897         # uses global variable $project
5898         my ($taglist, $from, $to, $extra) = @_;
5899         $from = 0 unless defined $from;
5900         $to = $#{$taglist} if (!defined $to || $#{$taglist} < $to);
5901
5902         print "<table class=\"tags\">\n";
5903         my $alternate = 1;
5904         for (my $i = $from; $i <= $to; $i++) {
5905                 my $entry = $taglist->[$i];
5906                 my %tag = %$entry;
5907                 my $comment = $tag{'subject'};
5908                 my $comment_short;
5909                 if (defined $comment) {
5910                         $comment_short = chop_str($comment, 30, 5);
5911                 }
5912                 if ($alternate) {
5913                         print "<tr class=\"dark\">\n";
5914                 } else {
5915                         print "<tr class=\"light\">\n";
5916                 }
5917                 $alternate ^= 1;
5918                 if (defined $tag{'age'}) {
5919                         print "<td><i>$tag{'age'}</i></td>\n";
5920                 } else {
5921                         print "<td></td>\n";
5922                 }
5923                 print "<td>" .
5924                       $cgi->a({-href => href(action=>$tag{'reftype'}, hash=>$tag{'refid'}),
5925                                -class => "list name"}, esc_html($tag{'name'})) .
5926                       "</td>\n" .
5927                       "<td>";
5928                 if (defined $comment) {
5929                         print format_subject_html($comment, $comment_short,
5930                                                   href(action=>"tag", hash=>$tag{'id'}));
5931                 }
5932                 print "</td>\n" .
5933                       "<td class=\"selflink\">";
5934                 if ($tag{'type'} eq "tag") {
5935                         print $cgi->a({-href => href(action=>"tag", hash=>$tag{'id'})}, "tag");
5936                 } else {
5937                         print "&nbsp;";
5938                 }
5939                 print "</td>\n" .
5940                       "<td class=\"link\">" . " | " .
5941                       $cgi->a({-href => href(action=>$tag{'reftype'}, hash=>$tag{'refid'})}, $tag{'reftype'});
5942                 if ($tag{'reftype'} eq "commit") {
5943                         print " | " . $cgi->a({-href => href(action=>"shortlog", hash=>$tag{'fullname'})}, "shortlog") .
5944                               " | " . $cgi->a({-href => href(action=>"log", hash=>$tag{'fullname'})}, "log");
5945                 } elsif ($tag{'reftype'} eq "blob") {
5946                         print " | " . $cgi->a({-href => href(action=>"blob_plain", hash=>$tag{'refid'})}, "raw");
5947                 }
5948                 print "</td>\n" .
5949                       "</tr>";
5950         }
5951         if (defined $extra) {
5952                 print "<tr>\n" .
5953                       "<td colspan=\"5\">$extra</td>\n" .
5954                       "</tr>\n";
5955         }
5956         print "</table>\n";
5957 }
5958
5959 sub git_heads_body {
5960         # uses global variable $project
5961         my ($headlist, $head_at, $from, $to, $extra) = @_;
5962         $from = 0 unless defined $from;
5963         $to = $#{$headlist} if (!defined $to || $#{$headlist} < $to);
5964
5965         print "<table class=\"heads\">\n";
5966         my $alternate = 1;
5967         for (my $i = $from; $i <= $to; $i++) {
5968                 my $entry = $headlist->[$i];
5969                 my %ref = %$entry;
5970                 my $curr = defined $head_at && $ref{'id'} eq $head_at;
5971                 if ($alternate) {
5972                         print "<tr class=\"dark\">\n";
5973                 } else {
5974                         print "<tr class=\"light\">\n";
5975                 }
5976                 $alternate ^= 1;
5977                 print "<td><i>$ref{'age'}</i></td>\n" .
5978                       ($curr ? "<td class=\"current_head\">" : "<td>") .
5979                       $cgi->a({-href => href(action=>"shortlog", hash=>$ref{'fullname'}),
5980                                -class => "list name"},esc_html($ref{'name'})) .
5981                       "</td>\n" .
5982                       "<td class=\"link\">" .
5983                       $cgi->a({-href => href(action=>"shortlog", hash=>$ref{'fullname'})}, "shortlog") . " | " .
5984                       $cgi->a({-href => href(action=>"log", hash=>$ref{'fullname'})}, "log") . " | " .
5985                       $cgi->a({-href => href(action=>"tree", hash=>$ref{'fullname'}, hash_base=>$ref{'fullname'})}, "tree") .
5986                       "</td>\n" .
5987                       "</tr>";
5988         }
5989         if (defined $extra) {
5990                 print "<tr>\n" .
5991                       "<td colspan=\"3\">$extra</td>\n" .
5992                       "</tr>\n";
5993         }
5994         print "</table>\n";
5995 }
5996
5997 # Display a single remote block
5998 sub git_remote_block {
5999         my ($remote, $rdata, $limit, $head) = @_;
6000
6001         my $heads = $rdata->{'heads'};
6002         my $fetch = $rdata->{'fetch'};
6003         my $push = $rdata->{'push'};
6004
6005         my $urls_table = "<table class=\"projects_list\">\n" ;
6006
6007         if (defined $fetch) {
6008                 if ($fetch eq $push) {
6009                         $urls_table .= format_repo_url("URL", $fetch);
6010                 } else {
6011                         $urls_table .= format_repo_url("Fetch URL", $fetch);
6012                         $urls_table .= format_repo_url("Push URL", $push) if defined $push;
6013                 }
6014         } elsif (defined $push) {
6015                 $urls_table .= format_repo_url("Push URL", $push);
6016         } else {
6017                 $urls_table .= format_repo_url("", "No remote URL");
6018         }
6019
6020         $urls_table .= "</table>\n";
6021
6022         my $dots;
6023         if (defined $limit && $limit < @$heads) {
6024                 $dots = $cgi->a({-href => href(action=>"remotes", hash=>$remote)}, "...");
6025         }
6026
6027         print $urls_table;
6028         git_heads_body($heads, $head, 0, $limit, $dots);
6029 }
6030
6031 # Display a list of remote names with the respective fetch and push URLs
6032 sub git_remotes_list {
6033         my ($remotedata, $limit) = @_;
6034         print "<table class=\"heads\">\n";
6035         my $alternate = 1;
6036         my @remotes = sort keys %$remotedata;
6037
6038         my $limited = $limit && $limit < @remotes;
6039
6040         $#remotes = $limit - 1 if $limited;
6041
6042         while (my $remote = shift @remotes) {
6043                 my $rdata = $remotedata->{$remote};
6044                 my $fetch = $rdata->{'fetch'};
6045                 my $push = $rdata->{'push'};
6046                 if ($alternate) {
6047                         print "<tr class=\"dark\">\n";
6048                 } else {
6049                         print "<tr class=\"light\">\n";
6050                 }
6051                 $alternate ^= 1;
6052                 print "<td>" .
6053                       $cgi->a({-href=> href(action=>'remotes', hash=>$remote),
6054                                -class=> "list name"},esc_html($remote)) .
6055                       "</td>";
6056                 print "<td class=\"link\">" .
6057                       (defined $fetch ? $cgi->a({-href=> $fetch}, "fetch") : "fetch") .
6058                       " | " .
6059                       (defined $push ? $cgi->a({-href=> $push}, "push") : "push") .
6060                       "</td>";
6061
6062                 print "</tr>\n";
6063         }
6064
6065         if ($limited) {
6066                 print "<tr>\n" .
6067                       "<td colspan=\"3\">" .
6068                       $cgi->a({-href => href(action=>"remotes")}, "...") .
6069                       "</td>\n" . "</tr>\n";
6070         }
6071
6072         print "</table>";
6073 }
6074
6075 # Display remote heads grouped by remote, unless there are too many
6076 # remotes, in which case we only display the remote names
6077 sub git_remotes_body {
6078         my ($remotedata, $limit, $head) = @_;
6079         if ($limit and $limit < keys %$remotedata) {
6080                 git_remotes_list($remotedata, $limit);
6081         } else {
6082                 fill_remote_heads($remotedata);
6083                 while (my ($remote, $rdata) = each %$remotedata) {
6084                         git_print_section({-class=>"remote", -id=>$remote},
6085                                 ["remotes", $remote, $remote], sub {
6086                                         git_remote_block($remote, $rdata, $limit, $head);
6087                                 });
6088                 }
6089         }
6090 }
6091
6092 sub git_search_message {
6093         my %co = @_;
6094
6095         my $greptype;
6096         if ($searchtype eq 'commit') {
6097                 $greptype = "--grep=";
6098         } elsif ($searchtype eq 'author') {
6099                 $greptype = "--author=";
6100         } elsif ($searchtype eq 'committer') {
6101                 $greptype = "--committer=";
6102         }
6103         $greptype .= $searchtext;
6104         my @commitlist = parse_commits($hash, 101, (100 * $page), undef,
6105                                        $greptype, '--regexp-ignore-case',
6106                                        $search_use_regexp ? '--extended-regexp' : '--fixed-strings');
6107
6108         my $paging_nav = '';
6109         if ($page > 0) {
6110                 $paging_nav .=
6111                         $cgi->a({-href => href(-replay=>1, page=>undef)},
6112                                 "first") .
6113                         " &sdot; " .
6114                         $cgi->a({-href => href(-replay=>1, page=>$page-1),
6115                                  -accesskey => "p", -title => "Alt-p"}, "prev");
6116         } else {
6117                 $paging_nav .= "first &sdot; prev";
6118         }
6119         my $next_link = '';
6120         if ($#commitlist >= 100) {
6121                 $next_link =
6122                         $cgi->a({-href => href(-replay=>1, page=>$page+1),
6123                                  -accesskey => "n", -title => "Alt-n"}, "next");
6124                 $paging_nav .= " &sdot; $next_link";
6125         } else {
6126                 $paging_nav .= " &sdot; next";
6127         }
6128
6129         git_header_html();
6130
6131         git_print_page_nav('','', $hash,$co{'tree'},$hash, $paging_nav);
6132         git_print_header_div('commit', esc_html($co{'title'}), $hash);
6133         if ($page == 0 && !@commitlist) {
6134                 print "<p>No match.</p>\n";
6135         } else {
6136                 git_search_grep_body(\@commitlist, 0, 99, $next_link);
6137         }
6138
6139         git_footer_html();
6140 }
6141
6142 sub git_search_changes {
6143         my %co = @_;
6144
6145         local $/ = "\n";
6146         open my $fd, '-|', git_cmd(), '--no-pager', 'log', @diff_opts,
6147                 '--pretty=format:%H', '--no-abbrev', '--raw', "-S$searchtext",
6148                 ($search_use_regexp ? '--pickaxe-regex' : ())
6149                         or die_error(500, "Open git-log failed");
6150
6151         git_header_html();
6152
6153         git_print_page_nav('','', $hash,$co{'tree'},$hash);
6154         git_print_header_div('commit', esc_html($co{'title'}), $hash);
6155
6156         print "<table class=\"pickaxe search\">\n";
6157         my $alternate = 1;
6158         undef %co;
6159         my @files;
6160         while (my $line = <$fd>) {
6161                 chomp $line;
6162                 next unless $line;
6163
6164                 my %set = parse_difftree_raw_line($line);
6165                 if (defined $set{'commit'}) {
6166                         # finish previous commit
6167                         if (%co) {
6168                                 print "</td>\n" .
6169                                       "<td class=\"link\">" .
6170                                       $cgi->a({-href => href(action=>"commit", hash=>$co{'id'})},
6171                                               "commit") .
6172                                       " | " .
6173                                       $cgi->a({-href => href(action=>"tree", hash=>$co{'tree'},
6174                                                              hash_base=>$co{'id'})},
6175                                               "tree") .
6176                                       "</td>\n" .
6177                                       "</tr>\n";
6178                         }
6179
6180                         if ($alternate) {
6181                                 print "<tr class=\"dark\">\n";
6182                         } else {
6183                                 print "<tr class=\"light\">\n";
6184                         }
6185                         $alternate ^= 1;
6186                         %co = parse_commit($set{'commit'});
6187                         my $author = chop_and_escape_str($co{'author_name'}, 15, 5);
6188                         print "<td title=\"$co{'age_string_age'}\"><i>$co{'age_string_date'}</i></td>\n" .
6189                               "<td><i>$author</i></td>\n" .
6190                               "<td>" .
6191                               $cgi->a({-href => href(action=>"commit", hash=>$co{'id'}),
6192                                       -class => "list subject"},
6193                                       chop_and_escape_str($co{'title'}, 50) . "<br/>");
6194                 } elsif (defined $set{'to_id'}) {
6195                         next if ($set{'to_id'} =~ m/^0{40}$/);
6196
6197                         print $cgi->a({-href => href(action=>"blob", hash_base=>$co{'id'},
6198                                                      hash=>$set{'to_id'}, file_name=>$set{'to_file'}),
6199                                       -class => "list"},
6200                                       "<span class=\"match\">" . esc_path($set{'file'}) . "</span>") .
6201                               "<br/>\n";
6202                 }
6203         }
6204         close $fd;
6205
6206         # finish last commit (warning: repetition!)
6207         if (%co) {
6208                 print "</td>\n" .
6209                       "<td class=\"link\">" .
6210                       $cgi->a({-href => href(action=>"commit", hash=>$co{'id'})},
6211                               "commit") .
6212                       " | " .
6213                       $cgi->a({-href => href(action=>"tree", hash=>$co{'tree'},
6214                                              hash_base=>$co{'id'})},
6215                               "tree") .
6216                       "</td>\n" .
6217                       "</tr>\n";
6218         }
6219
6220         print "</table>\n";
6221
6222         git_footer_html();
6223 }
6224
6225 sub git_search_files {
6226         my %co = @_;
6227
6228         local $/ = "\n";
6229         open my $fd, "-|", git_cmd(), 'grep', '-n', '-z',
6230                 $search_use_regexp ? ('-E', '-i') : '-F',
6231                 $searchtext, $co{'tree'}
6232                         or die_error(500, "Open git-grep failed");
6233
6234         git_header_html();
6235
6236         git_print_page_nav('','', $hash,$co{'tree'},$hash);
6237         git_print_header_div('commit', esc_html($co{'title'}), $hash);
6238
6239         print "<table class=\"grep_search\">\n";
6240         my $alternate = 1;
6241         my $matches = 0;
6242         my $lastfile = '';
6243         my $file_href;
6244         while (my $line = <$fd>) {
6245                 chomp $line;
6246                 my ($file, $lno, $ltext, $binary);
6247                 last if ($matches++ > 1000);
6248                 if ($line =~ /^Binary file (.+) matches$/) {
6249                         $file = $1;
6250                         $binary = 1;
6251                 } else {
6252                         ($file, $lno, $ltext) = split(/\0/, $line, 3);
6253                         $file =~ s/^$co{'tree'}://;
6254                 }
6255                 if ($file ne $lastfile) {
6256                         $lastfile and print "</td></tr>\n";
6257                         if ($alternate++) {
6258                                 print "<tr class=\"dark\">\n";
6259                         } else {
6260                                 print "<tr class=\"light\">\n";
6261                         }
6262                         $file_href = href(action=>"blob", hash_base=>$co{'id'},
6263                                           file_name=>$file);
6264                         print "<td class=\"list\">".
6265                                 $cgi->a({-href => $file_href, -class => "list"}, esc_path($file));
6266                         print "</td><td>\n";
6267                         $lastfile = $file;
6268                 }
6269                 if ($binary) {
6270                         print "<div class=\"binary\">Binary file</div>\n";
6271                 } else {
6272                         $ltext = untabify($ltext);
6273                         if ($ltext =~ m/^(.*)($search_regexp)(.*)$/i) {
6274                                 $ltext = esc_html($1, -nbsp=>1);
6275                                 $ltext .= '<span class="match">';
6276                                 $ltext .= esc_html($2, -nbsp=>1);
6277                                 $ltext .= '</span>';
6278                                 $ltext .= esc_html($3, -nbsp=>1);
6279                         } else {
6280                                 $ltext = esc_html($ltext, -nbsp=>1);
6281                         }
6282                         print "<div class=\"pre\">" .
6283                                 $cgi->a({-href => $file_href.'#l'.$lno,
6284                                         -class => "linenr"}, sprintf('%4i', $lno)) .
6285                                 ' ' .  $ltext . "</div>\n";
6286                 }
6287         }
6288         if ($lastfile) {
6289                 print "</td></tr>\n";
6290                 if ($matches > 1000) {
6291                         print "<div class=\"diff nodifferences\">Too many matches, listing trimmed</div>\n";
6292                 }
6293         } else {
6294                 print "<div class=\"diff nodifferences\">No matches found</div>\n";
6295         }
6296         close $fd;
6297
6298         print "</table>\n";
6299
6300         git_footer_html();
6301 }
6302
6303 sub git_search_grep_body {
6304         my ($commitlist, $from, $to, $extra) = @_;
6305         $from = 0 unless defined $from;
6306         $to = $#{$commitlist} if (!defined $to || $#{$commitlist} < $to);
6307
6308         print "<table class=\"commit_search\">\n";
6309         my $alternate = 1;
6310         for (my $i = $from; $i <= $to; $i++) {
6311                 my %co = %{$commitlist->[$i]};
6312                 if (!%co) {
6313                         next;
6314                 }
6315                 my $commit = $co{'id'};
6316                 if ($alternate) {
6317                         print "<tr class=\"dark\">\n";
6318                 } else {
6319                         print "<tr class=\"light\">\n";
6320                 }
6321                 $alternate ^= 1;
6322                 print "<td title=\"$co{'age_string_age'}\"><i>$co{'age_string_date'}</i></td>\n" .
6323                       format_author_html('td', \%co, 15, 5) .
6324                       "<td>" .
6325                       $cgi->a({-href => href(action=>"commit", hash=>$co{'id'}),
6326                                -class => "list subject"},
6327                               chop_and_escape_str($co{'title'}, 50) . "<br/>");
6328                 my $comment = $co{'comment'};
6329                 foreach my $line (@$comment) {
6330                         if ($line =~ m/^(.*?)($search_regexp)(.*)$/i) {
6331                                 my ($lead, $match, $trail) = ($1, $2, $3);
6332                                 $match = chop_str($match, 70, 5, 'center');
6333                                 my $contextlen = int((80 - length($match))/2);
6334                                 $contextlen = 30 if ($contextlen > 30);
6335                                 $lead  = chop_str($lead,  $contextlen, 10, 'left');
6336                                 $trail = chop_str($trail, $contextlen, 10, 'right');
6337
6338                                 $lead  = esc_html($lead);
6339                                 $match = esc_html($match);
6340                                 $trail = esc_html($trail);
6341
6342                                 print "$lead<span class=\"match\">$match</span>$trail<br />";
6343                         }
6344                 }
6345                 print "</td>\n" .
6346                       "<td class=\"link\">" .
6347                       $cgi->a({-href => href(action=>"commit", hash=>$co{'id'})}, "commit") .
6348                       " | " .
6349                       $cgi->a({-href => href(action=>"commitdiff", hash=>$co{'id'})}, "commitdiff") .
6350                       " | " .
6351                       $cgi->a({-href => href(action=>"tree", hash=>$co{'tree'}, hash_base=>$co{'id'})}, "tree");
6352                 print "</td>\n" .
6353                       "</tr>\n";
6354         }
6355         if (defined $extra) {
6356                 print "<tr>\n" .
6357                       "<td colspan=\"3\">$extra</td>\n" .
6358                       "</tr>\n";
6359         }
6360         print "</table>\n";
6361 }
6362
6363 ## ======================================================================
6364 ## ======================================================================
6365 ## actions
6366
6367 sub git_project_list {
6368         my $order = $input_params{'order'};
6369         if (defined $order && $order !~ m/none|project|descr|owner|age/) {
6370                 die_error(400, "Unknown order parameter");
6371         }
6372
6373         my @list = git_get_projects_list($project_filter, $strict_export);
6374         if (!@list) {
6375                 die_error(404, "No projects found");
6376         }
6377
6378         git_header_html();
6379         if (defined $home_text && -f $home_text) {
6380                 print "<div class=\"index_include\">\n";
6381                 insert_file($home_text);
6382                 print "</div>\n";
6383         }
6384
6385         git_project_search_form($searchtext, $search_use_regexp);
6386         git_project_list_body(\@list, $order);
6387         git_footer_html();
6388 }
6389
6390 sub git_forks {
6391         my $order = $input_params{'order'};
6392         if (defined $order && $order !~ m/none|project|descr|owner|age/) {
6393                 die_error(400, "Unknown order parameter");
6394         }
6395
6396         my $filter = $project;
6397         $filter =~ s/\.git$//;
6398         my @list = git_get_projects_list($filter);
6399         if (!@list) {
6400                 die_error(404, "No forks found");
6401         }
6402
6403         git_header_html();
6404         git_print_page_nav('','');
6405         git_print_header_div('summary', "$project forks");
6406         git_project_list_body(\@list, $order);
6407         git_footer_html();
6408 }
6409
6410 sub git_project_index {
6411         my @projects = git_get_projects_list($project_filter, $strict_export);
6412         if (!@projects) {
6413                 die_error(404, "No projects found");
6414         }
6415
6416         print $cgi->header(
6417                 -type => 'text/plain',
6418                 -charset => 'utf-8',
6419                 -content_disposition => 'inline; filename="index.aux"');
6420
6421         foreach my $pr (@projects) {
6422                 if (!exists $pr->{'owner'}) {
6423                         $pr->{'owner'} = git_get_project_owner("$pr->{'path'}");
6424                 }
6425
6426                 my ($path, $owner) = ($pr->{'path'}, $pr->{'owner'});
6427                 # quote as in CGI::Util::encode, but keep the slash, and use '+' for ' '
6428                 $path  =~ s/([^a-zA-Z0-9_.\-\/ ])/sprintf("%%%02X", ord($1))/eg;
6429                 $owner =~ s/([^a-zA-Z0-9_.\-\/ ])/sprintf("%%%02X", ord($1))/eg;
6430                 $path  =~ s/ /\+/g;
6431                 $owner =~ s/ /\+/g;
6432
6433                 print "$path $owner\n";
6434         }
6435 }
6436
6437 sub git_summary {
6438         my $descr = git_get_project_description($project) || "none";
6439         my %co = parse_commit("HEAD");
6440         my %cd = %co ? parse_date($co{'committer_epoch'}, $co{'committer_tz'}) : ();
6441         my $head = $co{'id'};
6442         my $remote_heads = gitweb_check_feature('remote_heads');
6443
6444         my $owner = git_get_project_owner($project);
6445
6446         my $refs = git_get_references();
6447         # These get_*_list functions return one more to allow us to see if
6448         # there are more ...
6449         my @taglist  = git_get_tags_list(16);
6450         my @headlist = git_get_heads_list(16);
6451         my %remotedata = $remote_heads ? git_get_remotes_list() : ();
6452         my @forklist;
6453         my $check_forks = gitweb_check_feature('forks');
6454
6455         if ($check_forks) {
6456                 # find forks of a project
6457                 my $filter = $project;
6458                 $filter =~ s/\.git$//;
6459                 @forklist = git_get_projects_list($filter);
6460                 # filter out forks of forks
6461                 @forklist = filter_forks_from_projects_list(\@forklist)
6462                         if (@forklist);
6463         }
6464
6465         git_header_html();
6466         git_print_page_nav('summary','', $head);
6467
6468         print "<div class=\"title\">&nbsp;</div>\n";
6469         print "<table class=\"projects_list\">\n" .
6470               "<tr id=\"metadata_desc\"><td>description</td><td>" . esc_html($descr) . "</td></tr>\n";
6471         unless ($omit_owner) {
6472                 print  "<tr id=\"metadata_owner\"><td>owner</td><td>" . esc_html($owner) . "</td></tr>\n";
6473         }
6474         if (defined $cd{'rfc2822'}) {
6475                 print "<tr id=\"metadata_lchange\"><td>last change</td>" .
6476                       "<td>".format_timestamp_html(\%cd)."</td></tr>\n";
6477         }
6478
6479         # use per project git URL list in $projectroot/$project/cloneurl
6480         # or make project git URL from git base URL and project name
6481         my $url_tag = "URL";
6482         my @url_list = git_get_project_url_list($project);
6483         @url_list = map { "$_/$project" } @git_base_url_list unless @url_list;
6484         foreach my $git_url (@url_list) {
6485                 next unless $git_url;
6486                 print format_repo_url($url_tag, $git_url);
6487                 $url_tag = "";
6488         }
6489
6490         # Tag cloud
6491         my $show_ctags = gitweb_check_feature('ctags');
6492         if ($show_ctags) {
6493                 my $ctags = git_get_project_ctags($project);
6494                 if (%$ctags) {
6495                         # without ability to add tags, don't show if there are none
6496                         my $cloud = git_populate_project_tagcloud($ctags);
6497                         print "<tr id=\"metadata_ctags\">" .
6498                               "<td>content tags</td>" .
6499                               "<td>".git_show_project_tagcloud($cloud, 48)."</td>" .
6500                               "</tr>\n";
6501                 }
6502         }
6503
6504         print "</table>\n";
6505
6506         # If XSS prevention is on, we don't include README.html.
6507         # TODO: Allow a readme in some safe format.
6508         if (!$prevent_xss && -s "$projectroot/$project/README.html") {
6509                 print "<div class=\"title\">readme</div>\n" .
6510                       "<div class=\"readme\">\n";
6511                 insert_file("$projectroot/$project/README.html");
6512                 print "\n</div>\n"; # class="readme"
6513         }
6514
6515         # we need to request one more than 16 (0..15) to check if
6516         # those 16 are all
6517         my @commitlist = $head ? parse_commits($head, 17) : ();
6518         if (@commitlist) {
6519                 git_print_header_div('shortlog');
6520                 git_shortlog_body(\@commitlist, 0, 15, $refs,
6521                                   $#commitlist <=  15 ? undef :
6522                                   $cgi->a({-href => href(action=>"shortlog")}, "..."));
6523         }
6524
6525         if (@taglist) {
6526                 git_print_header_div('tags');
6527                 git_tags_body(\@taglist, 0, 15,
6528                               $#taglist <=  15 ? undef :
6529                               $cgi->a({-href => href(action=>"tags")}, "..."));
6530         }
6531
6532         if (@headlist) {
6533                 git_print_header_div('heads');
6534                 git_heads_body(\@headlist, $head, 0, 15,
6535                                $#headlist <= 15 ? undef :
6536                                $cgi->a({-href => href(action=>"heads")}, "..."));
6537         }
6538
6539         if (%remotedata) {
6540                 git_print_header_div('remotes');
6541                 git_remotes_body(\%remotedata, 15, $head);
6542         }
6543
6544         if (@forklist) {
6545                 git_print_header_div('forks');
6546                 git_project_list_body(\@forklist, 'age', 0, 15,
6547                                       $#forklist <= 15 ? undef :
6548                                       $cgi->a({-href => href(action=>"forks")}, "..."),
6549                                       'no_header');
6550         }
6551
6552         git_footer_html();
6553 }
6554
6555 sub git_tag {
6556         my %tag = parse_tag($hash);
6557
6558         if (! %tag) {
6559                 die_error(404, "Unknown tag object");
6560         }
6561
6562         my $head = git_get_head_hash($project);
6563         git_header_html();
6564         git_print_page_nav('','', $head,undef,$head);
6565         git_print_header_div('commit', esc_html($tag{'name'}), $hash);
6566         print "<div class=\"title_text\">\n" .
6567               "<table class=\"object_header\">\n" .
6568               "<tr>\n" .
6569               "<td>object</td>\n" .
6570               "<td>" . $cgi->a({-class => "list", -href => href(action=>$tag{'type'}, hash=>$tag{'object'})},
6571                                $tag{'object'}) . "</td>\n" .
6572               "<td class=\"link\">" . $cgi->a({-href => href(action=>$tag{'type'}, hash=>$tag{'object'})},
6573                                               $tag{'type'}) . "</td>\n" .
6574               "</tr>\n";
6575         if (defined($tag{'author'})) {
6576                 git_print_authorship_rows(\%tag, 'author');
6577         }
6578         print "</table>\n\n" .
6579               "</div>\n";
6580         print "<div class=\"page_body\">";
6581         my $comment = $tag{'comment'};
6582         foreach my $line (@$comment) {
6583                 chomp $line;
6584                 print esc_html($line, -nbsp=>1) . "<br/>\n";
6585         }
6586         print "</div>\n";
6587         git_footer_html();
6588 }
6589
6590 sub git_blame_common {
6591         my $format = shift || 'porcelain';
6592         if ($format eq 'porcelain' && $input_params{'javascript'}) {
6593                 $format = 'incremental';
6594                 $action = 'blame_incremental'; # for page title etc
6595         }
6596
6597         # permissions
6598         gitweb_check_feature('blame')
6599                 or die_error(403, "Blame view not allowed");
6600
6601         # error checking
6602         die_error(400, "No file name given") unless $file_name;
6603         $hash_base ||= git_get_head_hash($project);
6604         die_error(404, "Couldn't find base commit") unless $hash_base;
6605         my %co = parse_commit($hash_base)
6606                 or die_error(404, "Commit not found");
6607         my $ftype = "blob";
6608         if (!defined $hash) {
6609                 $hash = git_get_hash_by_path($hash_base, $file_name, "blob")
6610                         or die_error(404, "Error looking up file");
6611         } else {
6612                 $ftype = git_get_type($hash);
6613                 if ($ftype !~ "blob") {
6614                         die_error(400, "Object is not a blob");
6615                 }
6616         }
6617
6618         my $fd;
6619         if ($format eq 'incremental') {
6620                 # get file contents (as base)
6621                 open $fd, "-|", git_cmd(), 'cat-file', 'blob', $hash
6622                         or die_error(500, "Open git-cat-file failed");
6623         } elsif ($format eq 'data') {
6624                 # run git-blame --incremental
6625                 open $fd, "-|", git_cmd(), "blame", "--incremental",
6626                         $hash_base, "--", $file_name
6627                         or die_error(500, "Open git-blame --incremental failed");
6628         } else {
6629                 # run git-blame --porcelain
6630                 open $fd, "-|", git_cmd(), "blame", '-p',
6631                         $hash_base, '--', $file_name
6632                         or die_error(500, "Open git-blame --porcelain failed");
6633         }
6634
6635         # incremental blame data returns early
6636         if ($format eq 'data') {
6637                 print $cgi->header(
6638                         -type=>"text/plain", -charset => "utf-8",
6639                         -status=> "200 OK");
6640                 local $| = 1; # output autoflush
6641                 while (my $line = <$fd>) {
6642                         print to_utf8($line);
6643                 }
6644                 close $fd
6645                         or print "ERROR $!\n";
6646
6647                 print 'END';
6648                 if (defined $t0 && gitweb_check_feature('timed')) {
6649                         print ' '.
6650                               tv_interval($t0, [ gettimeofday() ]).
6651                               ' '.$number_of_git_cmds;
6652                 }
6653                 print "\n";
6654
6655                 return;
6656         }
6657
6658         # page header
6659         git_header_html();
6660         my $formats_nav =
6661                 $cgi->a({-href => href(action=>"blob", -replay=>1)},
6662                         "blob") .
6663                 " | ";
6664         if ($format eq 'incremental') {
6665                 $formats_nav .=
6666                         $cgi->a({-href => href(action=>"blame", javascript=>0, -replay=>1)},
6667                                 "blame") . " (non-incremental)";
6668         } else {
6669                 $formats_nav .=
6670                         $cgi->a({-href => href(action=>"blame_incremental", -replay=>1)},
6671                                 "blame") . " (incremental)";
6672         }
6673         $formats_nav .=
6674                 " | " .
6675                 $cgi->a({-href => href(action=>"history", -replay=>1)},
6676                         "history") .
6677                 " | " .
6678                 $cgi->a({-href => href(action=>$action, file_name=>$file_name)},
6679                         "HEAD");
6680         git_print_page_nav('','', $hash_base,$co{'tree'},$hash_base, $formats_nav);
6681         git_print_header_div('commit', esc_html($co{'title'}), $hash_base);
6682         git_print_page_path($file_name, $ftype, $hash_base);
6683
6684         # page body
6685         if ($format eq 'incremental') {
6686                 print "<noscript>\n<div class=\"error\"><center><b>\n".
6687                       "This page requires JavaScript to run.\n Use ".
6688                       $cgi->a({-href => href(action=>'blame',javascript=>0,-replay=>1)},
6689                               'this page').
6690                       " instead.\n".
6691                       "</b></center></div>\n</noscript>\n";
6692
6693                 print qq!<div id="progress_bar" style="width: 100%; background-color: yellow"></div>\n!;
6694         }
6695
6696         print qq!<div class="page_body">\n!;
6697         print qq!<div id="progress_info">... / ...</div>\n!
6698                 if ($format eq 'incremental');
6699         print qq!<table id="blame_table" class="blame" width="100%">\n!.
6700               #qq!<col width="5.5em" /><col width="2.5em" /><col width="*" />\n!.
6701               qq!<thead>\n!.
6702               qq!<tr><th>Commit</th><th>Line</th><th>Data</th></tr>\n!.
6703               qq!</thead>\n!.
6704               qq!<tbody>\n!;
6705
6706         my @rev_color = qw(light dark);
6707         my $num_colors = scalar(@rev_color);
6708         my $current_color = 0;
6709
6710         if ($format eq 'incremental') {
6711                 my $color_class = $rev_color[$current_color];
6712
6713                 #contents of a file
6714                 my $linenr = 0;
6715         LINE:
6716                 while (my $line = <$fd>) {
6717                         chomp $line;
6718                         $linenr++;
6719
6720                         print qq!<tr id="l$linenr" class="$color_class">!.
6721                               qq!<td class="sha1"><a href=""> </a></td>!.
6722                               qq!<td class="linenr">!.
6723                               qq!<a class="linenr" href="">$linenr</a></td>!;
6724                         print qq!<td class="pre">! . esc_html($line) . "</td>\n";
6725                         print qq!</tr>\n!;
6726                 }
6727
6728         } else { # porcelain, i.e. ordinary blame
6729                 my %metainfo = (); # saves information about commits
6730
6731                 # blame data
6732         LINE:
6733                 while (my $line = <$fd>) {
6734                         chomp $line;
6735                         # the header: <SHA-1> <src lineno> <dst lineno> [<lines in group>]
6736                         # no <lines in group> for subsequent lines in group of lines
6737                         my ($full_rev, $orig_lineno, $lineno, $group_size) =
6738                            ($line =~ /^([0-9a-f]{40}) (\d+) (\d+)(?: (\d+))?$/);
6739                         if (!exists $metainfo{$full_rev}) {
6740                                 $metainfo{$full_rev} = { 'nprevious' => 0 };
6741                         }
6742                         my $meta = $metainfo{$full_rev};
6743                         my $data;
6744                         while ($data = <$fd>) {
6745                                 chomp $data;
6746                                 last if ($data =~ s/^\t//); # contents of line
6747                                 if ($data =~ /^(\S+)(?: (.*))?$/) {
6748                                         $meta->{$1} = $2 unless exists $meta->{$1};
6749                                 }
6750                                 if ($data =~ /^previous /) {
6751                                         $meta->{'nprevious'}++;
6752                                 }
6753                         }
6754                         my $short_rev = substr($full_rev, 0, 8);
6755                         my $author = $meta->{'author'};
6756                         my %date =
6757                                 parse_date($meta->{'author-time'}, $meta->{'author-tz'});
6758                         my $date = $date{'iso-tz'};
6759                         if ($group_size) {
6760                                 $current_color = ($current_color + 1) % $num_colors;
6761                         }
6762                         my $tr_class = $rev_color[$current_color];
6763                         $tr_class .= ' boundary' if (exists $meta->{'boundary'});
6764                         $tr_class .= ' no-previous' if ($meta->{'nprevious'} == 0);
6765                         $tr_class .= ' multiple-previous' if ($meta->{'nprevious'} > 1);
6766                         print "<tr id=\"l$lineno\" class=\"$tr_class\">\n";
6767                         if ($group_size) {
6768                                 print "<td class=\"sha1\"";
6769                                 print " title=\"". esc_html($author) . ", $date\"";
6770                                 print " rowspan=\"$group_size\"" if ($group_size > 1);
6771                                 print ">";
6772                                 print $cgi->a({-href => href(action=>"commit",
6773                                                              hash=>$full_rev,
6774                                                              file_name=>$file_name)},
6775                                               esc_html($short_rev));
6776                                 if ($group_size >= 2) {
6777                                         my @author_initials = ($author =~ /\b([[:upper:]])\B/g);
6778                                         if (@author_initials) {
6779                                                 print "<br />" .
6780                                                       esc_html(join('', @author_initials));
6781                                                 #           or join('.', ...)
6782                                         }
6783                                 }
6784                                 print "</td>\n";
6785                         }
6786                         # 'previous' <sha1 of parent commit> <filename at commit>
6787                         if (exists $meta->{'previous'} &&
6788                             $meta->{'previous'} =~ /^([a-fA-F0-9]{40}) (.*)$/) {
6789                                 $meta->{'parent'} = $1;
6790                                 $meta->{'file_parent'} = unquote($2);
6791                         }
6792                         my $linenr_commit =
6793                                 exists($meta->{'parent'}) ?
6794                                 $meta->{'parent'} : $full_rev;
6795                         my $linenr_filename =
6796                                 exists($meta->{'file_parent'}) ?
6797                                 $meta->{'file_parent'} : unquote($meta->{'filename'});
6798                         my $blamed = href(action => 'blame',
6799                                           file_name => $linenr_filename,
6800                                           hash_base => $linenr_commit);
6801                         print "<td class=\"linenr\">";
6802                         print $cgi->a({ -href => "$blamed#l$orig_lineno",
6803                                         -class => "linenr" },
6804                                       esc_html($lineno));
6805                         print "</td>";
6806                         print "<td class=\"pre\">" . esc_html($data) . "</td>\n";
6807                         print "</tr>\n";
6808                 } # end while
6809
6810         }
6811
6812         # footer
6813         print "</tbody>\n".
6814               "</table>\n"; # class="blame"
6815         print "</div>\n";   # class="blame_body"
6816         close $fd
6817                 or print "Reading blob failed\n";
6818
6819         git_footer_html();
6820 }
6821
6822 sub git_blame {
6823         git_blame_common();
6824 }
6825
6826 sub git_blame_incremental {
6827         git_blame_common('incremental');
6828 }
6829
6830 sub git_blame_data {
6831         git_blame_common('data');
6832 }
6833
6834 sub git_tags {
6835         my $head = git_get_head_hash($project);
6836         git_header_html();
6837         git_print_page_nav('','', $head,undef,$head,format_ref_views('tags'));
6838         git_print_header_div('summary', $project);
6839
6840         my @tagslist = git_get_tags_list();
6841         if (@tagslist) {
6842                 git_tags_body(\@tagslist);
6843         }
6844         git_footer_html();
6845 }
6846
6847 sub git_heads {
6848         my $head = git_get_head_hash($project);
6849         git_header_html();
6850         git_print_page_nav('','', $head,undef,$head,format_ref_views('heads'));
6851         git_print_header_div('summary', $project);
6852
6853         my @headslist = git_get_heads_list();
6854         if (@headslist) {
6855                 git_heads_body(\@headslist, $head);
6856         }
6857         git_footer_html();
6858 }
6859
6860 # used both for single remote view and for list of all the remotes
6861 sub git_remotes {
6862         gitweb_check_feature('remote_heads')
6863                 or die_error(403, "Remote heads view is disabled");
6864
6865         my $head = git_get_head_hash($project);
6866         my $remote = $input_params{'hash'};
6867
6868         my $remotedata = git_get_remotes_list($remote);
6869         die_error(500, "Unable to get remote information") unless defined $remotedata;
6870
6871         unless (%$remotedata) {
6872                 die_error(404, defined $remote ?
6873                         "Remote $remote not found" :
6874                         "No remotes found");
6875         }
6876
6877         git_header_html(undef, undef, -action_extra => $remote);
6878         git_print_page_nav('', '',  $head, undef, $head,
6879                 format_ref_views($remote ? '' : 'remotes'));
6880
6881         fill_remote_heads($remotedata);
6882         if (defined $remote) {
6883                 git_print_header_div('remotes', "$remote remote for $project");
6884                 git_remote_block($remote, $remotedata->{$remote}, undef, $head);
6885         } else {
6886                 git_print_header_div('summary', "$project remotes");
6887                 git_remotes_body($remotedata, undef, $head);
6888         }
6889
6890         git_footer_html();
6891 }
6892
6893 sub git_blob_plain {
6894         my $type = shift;
6895         my $expires;
6896
6897         if (!defined $hash) {
6898                 if (defined $file_name) {
6899                         my $base = $hash_base || git_get_head_hash($project);
6900                         $hash = git_get_hash_by_path($base, $file_name, "blob")
6901                                 or die_error(404, "Cannot find file");
6902                 } else {
6903                         die_error(400, "No file name defined");
6904                 }
6905         } elsif ($hash =~ m/^[0-9a-fA-F]{40}$/) {
6906                 # blobs defined by non-textual hash id's can be cached
6907                 $expires = "+1d";
6908         }
6909
6910         open my $fd, "-|", git_cmd(), "cat-file", "blob", $hash
6911                 or die_error(500, "Open git-cat-file blob '$hash' failed");
6912
6913         # content-type (can include charset)
6914         $type = blob_contenttype($fd, $file_name, $type);
6915
6916         # "save as" filename, even when no $file_name is given
6917         my $save_as = "$hash";
6918         if (defined $file_name) {
6919                 $save_as = $file_name;
6920         } elsif ($type =~ m/^text\//) {
6921                 $save_as .= '.txt';
6922         }
6923
6924         # With XSS prevention on, blobs of all types except a few known safe
6925         # ones are served with "Content-Disposition: attachment" to make sure
6926         # they don't run in our security domain.  For certain image types,
6927         # blob view writes an <img> tag referring to blob_plain view, and we
6928         # want to be sure not to break that by serving the image as an
6929         # attachment (though Firefox 3 doesn't seem to care).
6930         my $sandbox = $prevent_xss &&
6931                 $type !~ m!^(?:text/[a-z]+|image/(?:gif|png|jpeg))(?:[ ;]|$)!;
6932
6933         # serve text/* as text/plain
6934         if ($prevent_xss &&
6935             ($type =~ m!^text/[a-z]+\b(.*)$! ||
6936              ($type =~ m!^[a-z]+/[a-z]\+xml\b(.*)$! && -T $fd))) {
6937                 my $rest = $1;
6938                 $rest = defined $rest ? $rest : '';
6939                 $type = "text/plain$rest";
6940         }
6941
6942         print $cgi->header(
6943                 -type => $type,
6944                 -expires => $expires,
6945                 -content_disposition =>
6946                         ($sandbox ? 'attachment' : 'inline')
6947                         . '; filename="' . $save_as . '"');
6948         local $/ = undef;
6949         binmode STDOUT, ':raw';
6950         print <$fd>;
6951         binmode STDOUT, ':utf8'; # as set at the beginning of gitweb.cgi
6952         close $fd;
6953 }
6954
6955 sub git_blob {
6956         my $expires;
6957
6958         if (!defined $hash) {
6959                 if (defined $file_name) {
6960                         my $base = $hash_base || git_get_head_hash($project);
6961                         $hash = git_get_hash_by_path($base, $file_name, "blob")
6962                                 or die_error(404, "Cannot find file");
6963                 } else {
6964                         die_error(400, "No file name defined");
6965                 }
6966         } elsif ($hash =~ m/^[0-9a-fA-F]{40}$/) {
6967                 # blobs defined by non-textual hash id's can be cached
6968                 $expires = "+1d";
6969         }
6970
6971         my $have_blame = gitweb_check_feature('blame');
6972         open my $fd, "-|", git_cmd(), "cat-file", "blob", $hash
6973                 or die_error(500, "Couldn't cat $file_name, $hash");
6974         my $mimetype = blob_mimetype($fd, $file_name);
6975         # use 'blob_plain' (aka 'raw') view for files that cannot be displayed
6976         if ($mimetype !~ m!^(?:text/|image/(?:gif|png|jpeg)$)! && -B $fd) {
6977                 close $fd;
6978                 return git_blob_plain($mimetype);
6979         }
6980         # we can have blame only for text/* mimetype
6981         $have_blame &&= ($mimetype =~ m!^text/!);
6982
6983         my $highlight = gitweb_check_feature('highlight');
6984         my $syntax = guess_file_syntax($highlight, $mimetype, $file_name);
6985         $fd = run_highlighter($fd, $highlight, $syntax)
6986                 if $syntax;
6987
6988         git_header_html(undef, $expires);
6989         my $formats_nav = '';
6990         if (defined $hash_base && (my %co = parse_commit($hash_base))) {
6991                 if (defined $file_name) {
6992                         if ($have_blame) {
6993                                 $formats_nav .=
6994                                         $cgi->a({-href => href(action=>"blame", -replay=>1)},
6995                                                 "blame") .
6996                                         " | ";
6997                         }
6998                         $formats_nav .=
6999                                 $cgi->a({-href => href(action=>"history", -replay=>1)},
7000                                         "history") .
7001                                 " | " .
7002                                 $cgi->a({-href => href(action=>"blob_plain", -replay=>1)},
7003                                         "raw") .
7004                                 " | " .
7005                                 $cgi->a({-href => href(action=>"blob",
7006                                                        hash_base=>"HEAD", file_name=>$file_name)},
7007                                         "HEAD");
7008                 } else {
7009                         $formats_nav .=
7010                                 $cgi->a({-href => href(action=>"blob_plain", -replay=>1)},
7011                                         "raw");
7012                 }
7013                 git_print_page_nav('','', $hash_base,$co{'tree'},$hash_base, $formats_nav);
7014                 git_print_header_div('commit', esc_html($co{'title'}), $hash_base);
7015         } else {
7016                 print "<div class=\"page_nav\">\n" .
7017                       "<br/><br/></div>\n" .
7018                       "<div class=\"title\">".esc_html($hash)."</div>\n";
7019         }
7020         git_print_page_path($file_name, "blob", $hash_base);
7021         print "<div class=\"page_body\">\n";
7022         if ($mimetype =~ m!^image/!) {
7023                 print qq!<img type="!.esc_attr($mimetype).qq!"!;
7024                 if ($file_name) {
7025                         print qq! alt="!.esc_attr($file_name).qq!" title="!.esc_attr($file_name).qq!"!;
7026                 }
7027                 print qq! src="! .
7028                       href(action=>"blob_plain", hash=>$hash,
7029                            hash_base=>$hash_base, file_name=>$file_name) .
7030                       qq!" />\n!;
7031         } else {
7032                 my $nr;
7033                 while (my $line = <$fd>) {
7034                         chomp $line;
7035                         $nr++;
7036                         $line = untabify($line);
7037                         printf qq!<div class="pre"><a id="l%i" href="%s#l%i" class="linenr">%4i</a> %s</div>\n!,
7038                                $nr, esc_attr(href(-replay => 1)), $nr, $nr,
7039                                $syntax ? sanitize($line) : esc_html($line, -nbsp=>1);
7040                 }
7041         }
7042         close $fd
7043                 or print "Reading blob failed.\n";
7044         print "</div>";
7045         git_footer_html();
7046 }
7047
7048 sub git_tree {
7049         if (!defined $hash_base) {
7050                 $hash_base = "HEAD";
7051         }
7052         if (!defined $hash) {
7053                 if (defined $file_name) {
7054                         $hash = git_get_hash_by_path($hash_base, $file_name, "tree");
7055                 } else {
7056                         $hash = $hash_base;
7057                 }
7058         }
7059         die_error(404, "No such tree") unless defined($hash);
7060
7061         my $show_sizes = gitweb_check_feature('show-sizes');
7062         my $have_blame = gitweb_check_feature('blame');
7063
7064         my @entries = ();
7065         {
7066                 local $/ = "\0";
7067                 open my $fd, "-|", git_cmd(), "ls-tree", '-z',
7068                         ($show_sizes ? '-l' : ()), @extra_options, $hash
7069                         or die_error(500, "Open git-ls-tree failed");
7070                 @entries = map { chomp; $_ } <$fd>;
7071                 close $fd
7072                         or die_error(404, "Reading tree failed");
7073         }
7074
7075         my $refs = git_get_references();
7076         my $ref = format_ref_marker($refs, $hash_base);
7077         git_header_html();
7078         my $basedir = '';
7079         if (defined $hash_base && (my %co = parse_commit($hash_base))) {
7080                 my @views_nav = ();
7081                 if (defined $file_name) {
7082                         push @views_nav,
7083                                 $cgi->a({-href => href(action=>"history", -replay=>1)},
7084                                         "history"),
7085                                 $cgi->a({-href => href(action=>"tree",
7086                                                        hash_base=>"HEAD", file_name=>$file_name)},
7087                                         "HEAD"),
7088                 }
7089                 my $snapshot_links = format_snapshot_links($hash);
7090                 if (defined $snapshot_links) {
7091                         # FIXME: Should be available when we have no hash base as well.
7092                         push @views_nav, $snapshot_links;
7093                 }
7094                 git_print_page_nav('tree','', $hash_base, undef, undef,
7095                                    join(' | ', @views_nav));
7096                 git_print_header_div('commit', esc_html($co{'title'}) . $ref, $hash_base);
7097         } else {
7098                 undef $hash_base;
7099                 print "<div class=\"page_nav\">\n";
7100                 print "<br/><br/></div>\n";
7101                 print "<div class=\"title\">".esc_html($hash)."</div>\n";
7102         }
7103         if (defined $file_name) {
7104                 $basedir = $file_name;
7105                 if ($basedir ne '' && substr($basedir, -1) ne '/') {
7106                         $basedir .= '/';
7107                 }
7108                 git_print_page_path($file_name, 'tree', $hash_base);
7109         }
7110         print "<div class=\"page_body\">\n";
7111         print "<table class=\"tree\">\n";
7112         my $alternate = 1;
7113         # '..' (top directory) link if possible
7114         if (defined $hash_base &&
7115             defined $file_name && $file_name =~ m![^/]+$!) {
7116                 if ($alternate) {
7117                         print "<tr class=\"dark\">\n";
7118                 } else {
7119                         print "<tr class=\"light\">\n";
7120                 }
7121                 $alternate ^= 1;
7122
7123                 my $up = $file_name;
7124                 $up =~ s!/?[^/]+$!!;
7125                 undef $up unless $up;
7126                 # based on git_print_tree_entry
7127                 print '<td class="mode">' . mode_str('040000') . "</td>\n";
7128                 print '<td class="size">&nbsp;</td>'."\n" if $show_sizes;
7129                 print '<td class="list">';
7130                 print $cgi->a({-href => href(action=>"tree",
7131                                              hash_base=>$hash_base,
7132                                              file_name=>$up)},
7133                               "..");
7134                 print "</td>\n";
7135                 print "<td class=\"link\"></td>\n";
7136
7137                 print "</tr>\n";
7138         }
7139         foreach my $line (@entries) {
7140                 my %t = parse_ls_tree_line($line, -z => 1, -l => $show_sizes);
7141
7142                 if ($alternate) {
7143                         print "<tr class=\"dark\">\n";
7144                 } else {
7145                         print "<tr class=\"light\">\n";
7146                 }
7147                 $alternate ^= 1;
7148
7149                 git_print_tree_entry(\%t, $basedir, $hash_base, $have_blame);
7150
7151                 print "</tr>\n";
7152         }
7153         print "</table>\n" .
7154               "</div>";
7155         git_footer_html();
7156 }
7157
7158 sub snapshot_name {
7159         my ($project, $hash) = @_;
7160
7161         # path/to/project.git  -> project
7162         # path/to/project/.git -> project
7163         my $name = to_utf8($project);
7164         $name =~ s,([^/])/*\.git$,$1,;
7165         $name = basename($name);
7166         # sanitize name
7167         $name =~ s/[[:cntrl:]]/?/g;
7168
7169         my $ver = $hash;
7170         if ($hash =~ /^[0-9a-fA-F]+$/) {
7171                 # shorten SHA-1 hash
7172                 my $full_hash = git_get_full_hash($project, $hash);
7173                 if ($full_hash =~ /^$hash/ && length($hash) > 7) {
7174                         $ver = git_get_short_hash($project, $hash);
7175                 }
7176         } elsif ($hash =~ m!^refs/tags/(.*)$!) {
7177                 # tags don't need shortened SHA-1 hash
7178                 $ver = $1;
7179         } else {
7180                 # branches and other need shortened SHA-1 hash
7181                 if ($hash =~ m!^refs/(?:heads|remotes)/(.*)$!) {
7182                         $ver = $1;
7183                 }
7184                 $ver .= '-' . git_get_short_hash($project, $hash);
7185         }
7186         # in case of hierarchical branch names
7187         $ver =~ s!/!.!g;
7188
7189         # name = project-version_string
7190         $name = "$name-$ver";
7191
7192         return wantarray ? ($name, $name) : $name;
7193 }
7194
7195 sub exit_if_unmodified_since {
7196         my ($latest_epoch) = @_;
7197         our $cgi;
7198
7199         my $if_modified = $cgi->http('IF_MODIFIED_SINCE');
7200         if (defined $if_modified) {
7201                 my $since;
7202                 if (eval { require HTTP::Date; 1; }) {
7203                         $since = HTTP::Date::str2time($if_modified);
7204                 } elsif (eval { require Time::ParseDate; 1; }) {
7205                         $since = Time::ParseDate::parsedate($if_modified, GMT => 1);
7206                 }
7207                 if (defined $since && $latest_epoch <= $since) {
7208                         my %latest_date = parse_date($latest_epoch);
7209                         print $cgi->header(
7210                                 -last_modified => $latest_date{'rfc2822'},
7211                                 -status => '304 Not Modified');
7212                         goto DONE_GITWEB;
7213                 }
7214         }
7215 }
7216
7217 sub git_snapshot {
7218         my $format = $input_params{'snapshot_format'};
7219         if (!@snapshot_fmts) {
7220                 die_error(403, "Snapshots not allowed");
7221         }
7222         # default to first supported snapshot format
7223         $format ||= $snapshot_fmts[0];
7224         if ($format !~ m/^[a-z0-9]+$/) {
7225                 die_error(400, "Invalid snapshot format parameter");
7226         } elsif (!exists($known_snapshot_formats{$format})) {
7227                 die_error(400, "Unknown snapshot format");
7228         } elsif ($known_snapshot_formats{$format}{'disabled'}) {
7229                 die_error(403, "Snapshot format not allowed");
7230         } elsif (!grep($_ eq $format, @snapshot_fmts)) {
7231                 die_error(403, "Unsupported snapshot format");
7232         }
7233
7234         my $type = git_get_type("$hash^{}");
7235         if (!$type) {
7236                 die_error(404, 'Object does not exist');
7237         }  elsif ($type eq 'blob') {
7238                 die_error(400, 'Object is not a tree-ish');
7239         }
7240
7241         my ($name, $prefix) = snapshot_name($project, $hash);
7242         my $filename = "$name$known_snapshot_formats{$format}{'suffix'}";
7243
7244         my %co = parse_commit($hash);
7245         exit_if_unmodified_since($co{'committer_epoch'}) if %co;
7246
7247         my $cmd = quote_command(
7248                 git_cmd(), 'archive',
7249                 "--format=$known_snapshot_formats{$format}{'format'}",
7250                 "--prefix=$prefix/", $hash);
7251         if (exists $known_snapshot_formats{$format}{'compressor'}) {
7252                 $cmd .= ' | ' . quote_command(@{$known_snapshot_formats{$format}{'compressor'}});
7253         }
7254
7255         $filename =~ s/(["\\])/\\$1/g;
7256         my %latest_date;
7257         if (%co) {
7258                 %latest_date = parse_date($co{'committer_epoch'}, $co{'committer_tz'});
7259         }
7260
7261         print $cgi->header(
7262                 -type => $known_snapshot_formats{$format}{'type'},
7263                 -content_disposition => 'inline; filename="' . $filename . '"',
7264                 %co ? (-last_modified => $latest_date{'rfc2822'}) : (),
7265                 -status => '200 OK');
7266
7267         open my $fd, "-|", $cmd
7268                 or die_error(500, "Execute git-archive failed");
7269         binmode STDOUT, ':raw';
7270         print <$fd>;
7271         binmode STDOUT, ':utf8'; # as set at the beginning of gitweb.cgi
7272         close $fd;
7273 }
7274
7275 sub git_log_generic {
7276         my ($fmt_name, $body_subr, $base, $parent, $file_name, $file_hash) = @_;
7277
7278         my $head = git_get_head_hash($project);
7279         if (!defined $base) {
7280                 $base = $head;
7281         }
7282         if (!defined $page) {
7283                 $page = 0;
7284         }
7285         my $refs = git_get_references();
7286
7287         my $commit_hash = $base;
7288         if (defined $parent) {
7289                 $commit_hash = "$parent..$base";
7290         }
7291         my @commitlist =
7292                 parse_commits($commit_hash, 101, (100 * $page),
7293                               defined $file_name ? ($file_name, "--full-history") : ());
7294
7295         my $ftype;
7296         if (!defined $file_hash && defined $file_name) {
7297                 # some commits could have deleted file in question,
7298                 # and not have it in tree, but one of them has to have it
7299                 for (my $i = 0; $i < @commitlist; $i++) {
7300                         $file_hash = git_get_hash_by_path($commitlist[$i]{'id'}, $file_name);
7301                         last if defined $file_hash;
7302                 }
7303         }
7304         if (defined $file_hash) {
7305                 $ftype = git_get_type($file_hash);
7306         }
7307         if (defined $file_name && !defined $ftype) {
7308                 die_error(500, "Unknown type of object");
7309         }
7310         my %co;
7311         if (defined $file_name) {
7312                 %co = parse_commit($base)
7313                         or die_error(404, "Unknown commit object");
7314         }
7315
7316
7317         my $paging_nav = format_paging_nav($fmt_name, $page, $#commitlist >= 100);
7318         my $next_link = '';
7319         if ($#commitlist >= 100) {
7320                 $next_link =
7321                         $cgi->a({-href => href(-replay=>1, page=>$page+1),
7322                                  -accesskey => "n", -title => "Alt-n"}, "next");
7323         }
7324         my $patch_max = gitweb_get_feature('patches');
7325         if ($patch_max && !defined $file_name) {
7326                 if ($patch_max < 0 || @commitlist <= $patch_max) {
7327                         $paging_nav .= " &sdot; " .
7328                                 $cgi->a({-href => href(action=>"patches", -replay=>1)},
7329                                         "patches");
7330                 }
7331         }
7332
7333         git_header_html();
7334         git_print_page_nav($fmt_name,'', $hash,$hash,$hash, $paging_nav);
7335         if (defined $file_name) {
7336                 git_print_header_div('commit', esc_html($co{'title'}), $base);
7337         } else {
7338                 git_print_header_div('summary', $project)
7339         }
7340         git_print_page_path($file_name, $ftype, $hash_base)
7341                 if (defined $file_name);
7342
7343         $body_subr->(\@commitlist, 0, 99, $refs, $next_link,
7344                      $file_name, $file_hash, $ftype);
7345
7346         git_footer_html();
7347 }
7348
7349 sub git_log {
7350         git_log_generic('log', \&git_log_body,
7351                         $hash, $hash_parent);
7352 }
7353
7354 sub git_commit {
7355         $hash ||= $hash_base || "HEAD";
7356         my %co = parse_commit($hash)
7357             or die_error(404, "Unknown commit object");
7358
7359         my $parent  = $co{'parent'};
7360         my $parents = $co{'parents'}; # listref
7361
7362         # we need to prepare $formats_nav before any parameter munging
7363         my $formats_nav;
7364         if (!defined $parent) {
7365                 # --root commitdiff
7366                 $formats_nav .= '(initial)';
7367         } elsif (@$parents == 1) {
7368                 # single parent commit
7369                 $formats_nav .=
7370                         '(parent: ' .
7371                         $cgi->a({-href => href(action=>"commit",
7372                                                hash=>$parent)},
7373                                 esc_html(substr($parent, 0, 7))) .
7374                         ')';
7375         } else {
7376                 # merge commit
7377                 $formats_nav .=
7378                         '(merge: ' .
7379                         join(' ', map {
7380                                 $cgi->a({-href => href(action=>"commit",
7381                                                        hash=>$_)},
7382                                         esc_html(substr($_, 0, 7)));
7383                         } @$parents ) .
7384                         ')';
7385         }
7386         if (gitweb_check_feature('patches') && @$parents <= 1) {
7387                 $formats_nav .= " | " .
7388                         $cgi->a({-href => href(action=>"patch", -replay=>1)},
7389                                 "patch");
7390         }
7391
7392         if (!defined $parent) {
7393                 $parent = "--root";
7394         }
7395         my @difftree;
7396         open my $fd, "-|", git_cmd(), "diff-tree", '-r', "--no-commit-id",
7397                 @diff_opts,
7398                 (@$parents <= 1 ? $parent : '-c'),
7399                 $hash, "--"
7400                 or die_error(500, "Open git-diff-tree failed");
7401         @difftree = map { chomp; $_ } <$fd>;
7402         close $fd or die_error(404, "Reading git-diff-tree failed");
7403
7404         # non-textual hash id's can be cached
7405         my $expires;
7406         if ($hash =~ m/^[0-9a-fA-F]{40}$/) {
7407                 $expires = "+1d";
7408         }
7409         my $refs = git_get_references();
7410         my $ref = format_ref_marker($refs, $co{'id'});
7411
7412         git_header_html(undef, $expires);
7413         git_print_page_nav('commit', '',
7414                            $hash, $co{'tree'}, $hash,
7415                            $formats_nav);
7416
7417         if (defined $co{'parent'}) {
7418                 git_print_header_div('commitdiff', esc_html($co{'title'}) . $ref, $hash);
7419         } else {
7420                 git_print_header_div('tree', esc_html($co{'title'}) . $ref, $co{'tree'}, $hash);
7421         }
7422         print "<div class=\"title_text\">\n" .
7423               "<table class=\"object_header\">\n";
7424         git_print_authorship_rows(\%co);
7425         print "<tr><td>commit</td><td class=\"sha1\">$co{'id'}</td></tr>\n";
7426         print "<tr>" .
7427               "<td>tree</td>" .
7428               "<td class=\"sha1\">" .
7429               $cgi->a({-href => href(action=>"tree", hash=>$co{'tree'}, hash_base=>$hash),
7430                        class => "list"}, $co{'tree'}) .
7431               "</td>" .
7432               "<td class=\"link\">" .
7433               $cgi->a({-href => href(action=>"tree", hash=>$co{'tree'}, hash_base=>$hash)},
7434                       "tree");
7435         my $snapshot_links = format_snapshot_links($hash);
7436         if (defined $snapshot_links) {
7437                 print " | " . $snapshot_links;
7438         }
7439         print "</td>" .
7440               "</tr>\n";
7441
7442         foreach my $par (@$parents) {
7443                 print "<tr>" .
7444                       "<td>parent</td>" .
7445                       "<td class=\"sha1\">" .
7446                       $cgi->a({-href => href(action=>"commit", hash=>$par),
7447                                class => "list"}, $par) .
7448                       "</td>" .
7449                       "<td class=\"link\">" .
7450                       $cgi->a({-href => href(action=>"commit", hash=>$par)}, "commit") .
7451                       " | " .
7452                       $cgi->a({-href => href(action=>"commitdiff", hash=>$hash, hash_parent=>$par)}, "diff") .
7453                       "</td>" .
7454                       "</tr>\n";
7455         }
7456         print "</table>".
7457               "</div>\n";
7458
7459         print "<div class=\"page_body\">\n";
7460         git_print_log($co{'comment'});
7461         print "</div>\n";
7462
7463         git_difftree_body(\@difftree, $hash, @$parents);
7464
7465         git_footer_html();
7466 }
7467
7468 sub git_object {
7469         # object is defined by:
7470         # - hash or hash_base alone
7471         # - hash_base and file_name
7472         my $type;
7473
7474         # - hash or hash_base alone
7475         if ($hash || ($hash_base && !defined $file_name)) {
7476                 my $object_id = $hash || $hash_base;
7477
7478                 open my $fd, "-|", quote_command(
7479                         git_cmd(), 'cat-file', '-t', $object_id) . ' 2> /dev/null'
7480                         or die_error(404, "Object does not exist");
7481                 $type = <$fd>;
7482                 chomp $type;
7483                 close $fd
7484                         or die_error(404, "Object does not exist");
7485
7486         # - hash_base and file_name
7487         } elsif ($hash_base && defined $file_name) {
7488                 $file_name =~ s,/+$,,;
7489
7490                 system(git_cmd(), "cat-file", '-e', $hash_base) == 0
7491                         or die_error(404, "Base object does not exist");
7492
7493                 # here errors should not happen
7494                 open my $fd, "-|", git_cmd(), "ls-tree", $hash_base, "--", $file_name
7495                         or die_error(500, "Open git-ls-tree failed");
7496                 my $line = <$fd>;
7497                 close $fd;
7498
7499                 #'100644 blob 0fa3f3a66fb6a137f6ec2c19351ed4d807070ffa  panic.c'
7500                 unless ($line && $line =~ m/^([0-9]+) (.+) ([0-9a-fA-F]{40})\t/) {
7501                         die_error(404, "File or directory for given base does not exist");
7502                 }
7503                 $type = $2;
7504                 $hash = $3;
7505         } else {
7506                 die_error(400, "Not enough information to find object");
7507         }
7508
7509         print $cgi->redirect(-uri => href(action=>$type, -full=>1,
7510                                           hash=>$hash, hash_base=>$hash_base,
7511                                           file_name=>$file_name),
7512                              -status => '302 Found');
7513 }
7514
7515 sub git_blobdiff {
7516         my $format = shift || 'html';
7517         my $diff_style = $input_params{'diff_style'} || 'inline';
7518
7519         my $fd;
7520         my @difftree;
7521         my %diffinfo;
7522         my $expires;
7523
7524         # preparing $fd and %diffinfo for git_patchset_body
7525         # new style URI
7526         if (defined $hash_base && defined $hash_parent_base) {
7527                 if (defined $file_name) {
7528                         # read raw output
7529                         open $fd, "-|", git_cmd(), "diff-tree", '-r', @diff_opts,
7530                                 $hash_parent_base, $hash_base,
7531                                 "--", (defined $file_parent ? $file_parent : ()), $file_name
7532                                 or die_error(500, "Open git-diff-tree failed");
7533                         @difftree = map { chomp; $_ } <$fd>;
7534                         close $fd
7535                                 or die_error(404, "Reading git-diff-tree failed");
7536                         @difftree
7537                                 or die_error(404, "Blob diff not found");
7538
7539                 } elsif (defined $hash &&
7540                          $hash =~ /[0-9a-fA-F]{40}/) {
7541                         # try to find filename from $hash
7542
7543                         # read filtered raw output
7544                         open $fd, "-|", git_cmd(), "diff-tree", '-r', @diff_opts,
7545                                 $hash_parent_base, $hash_base, "--"
7546                                 or die_error(500, "Open git-diff-tree failed");
7547                         @difftree =
7548                                 # ':100644 100644 03b21826... 3b93d5e7... M     ls-files.c'
7549                                 # $hash == to_id
7550                                 grep { /^:[0-7]{6} [0-7]{6} [0-9a-fA-F]{40} $hash/ }
7551                                 map { chomp; $_ } <$fd>;
7552                         close $fd
7553                                 or die_error(404, "Reading git-diff-tree failed");
7554                         @difftree
7555                                 or die_error(404, "Blob diff not found");
7556
7557                 } else {
7558                         die_error(400, "Missing one of the blob diff parameters");
7559                 }
7560
7561                 if (@difftree > 1) {
7562                         die_error(400, "Ambiguous blob diff specification");
7563                 }
7564
7565                 %diffinfo = parse_difftree_raw_line($difftree[0]);
7566                 $file_parent ||= $diffinfo{'from_file'} || $file_name;
7567                 $file_name   ||= $diffinfo{'to_file'};
7568
7569                 $hash_parent ||= $diffinfo{'from_id'};
7570                 $hash        ||= $diffinfo{'to_id'};
7571
7572                 # non-textual hash id's can be cached
7573                 if ($hash_base =~ m/^[0-9a-fA-F]{40}$/ &&
7574                     $hash_parent_base =~ m/^[0-9a-fA-F]{40}$/) {
7575                         $expires = '+1d';
7576                 }
7577
7578                 # open patch output
7579                 open $fd, "-|", git_cmd(), "diff-tree", '-r', @diff_opts,
7580                         '-p', ($format eq 'html' ? "--full-index" : ()),
7581                         $hash_parent_base, $hash_base,
7582                         "--", (defined $file_parent ? $file_parent : ()), $file_name
7583                         or die_error(500, "Open git-diff-tree failed");
7584         }
7585
7586         # old/legacy style URI -- not generated anymore since 1.4.3.
7587         if (!%diffinfo) {
7588                 die_error('404 Not Found', "Missing one of the blob diff parameters")
7589         }
7590
7591         # header
7592         if ($format eq 'html') {
7593                 my $formats_nav =
7594                         $cgi->a({-href => href(action=>"blobdiff_plain", -replay=>1)},
7595                                 "raw");
7596                 $formats_nav .= diff_style_nav($diff_style);
7597                 git_header_html(undef, $expires);
7598                 if (defined $hash_base && (my %co = parse_commit($hash_base))) {
7599                         git_print_page_nav('','', $hash_base,$co{'tree'},$hash_base, $formats_nav);
7600                         git_print_header_div('commit', esc_html($co{'title'}), $hash_base);
7601                 } else {
7602                         print "<div class=\"page_nav\"><br/>$formats_nav<br/></div>\n";
7603                         print "<div class=\"title\">".esc_html("$hash vs $hash_parent")."</div>\n";
7604                 }
7605                 if (defined $file_name) {
7606                         git_print_page_path($file_name, "blob", $hash_base);
7607                 } else {
7608                         print "<div class=\"page_path\"></div>\n";
7609                 }
7610
7611         } elsif ($format eq 'plain') {
7612                 print $cgi->header(
7613                         -type => 'text/plain',
7614                         -charset => 'utf-8',
7615                         -expires => $expires,
7616                         -content_disposition => 'inline; filename="' . "$file_name" . '.patch"');
7617
7618                 print "X-Git-Url: " . $cgi->self_url() . "\n\n";
7619
7620         } else {
7621                 die_error(400, "Unknown blobdiff format");
7622         }
7623
7624         # patch
7625         if ($format eq 'html') {
7626                 print "<div class=\"page_body\">\n";
7627
7628                 git_patchset_body($fd, $diff_style,
7629                                   [ \%diffinfo ], $hash_base, $hash_parent_base);
7630                 close $fd;
7631
7632                 print "</div>\n"; # class="page_body"
7633                 git_footer_html();
7634
7635         } else {
7636                 while (my $line = <$fd>) {
7637                         $line =~ s!a/($hash|$hash_parent)!'a/'.esc_path($diffinfo{'from_file'})!eg;
7638                         $line =~ s!b/($hash|$hash_parent)!'b/'.esc_path($diffinfo{'to_file'})!eg;
7639
7640                         print $line;
7641
7642                         last if $line =~ m!^\+\+\+!;
7643                 }
7644                 local $/ = undef;
7645                 print <$fd>;
7646                 close $fd;
7647         }
7648 }
7649
7650 sub git_blobdiff_plain {
7651         git_blobdiff('plain');
7652 }
7653
7654 # assumes that it is added as later part of already existing navigation,
7655 # so it returns "| foo | bar" rather than just "foo | bar"
7656 sub diff_style_nav {
7657         my ($diff_style, $is_combined) = @_;
7658         $diff_style ||= 'inline';
7659
7660         return "" if ($is_combined);
7661
7662         my @styles = (inline => 'inline', 'sidebyside' => 'side by side');
7663         my %styles = @styles;
7664         @styles =
7665                 @styles[ map { $_ * 2 } 0..$#styles/2 ];
7666
7667         return join '',
7668                 map { " | ".$_ }
7669                 map {
7670                         $_ eq $diff_style ? $styles{$_} :
7671                         $cgi->a({-href => href(-replay=>1, diff_style => $_)}, $styles{$_})
7672                 } @styles;
7673 }
7674
7675 sub git_commitdiff {
7676         my %params = @_;
7677         my $format = $params{-format} || 'html';
7678         my $diff_style = $input_params{'diff_style'} || 'inline';
7679
7680         my ($patch_max) = gitweb_get_feature('patches');
7681         if ($format eq 'patch') {
7682                 die_error(403, "Patch view not allowed") unless $patch_max;
7683         }
7684
7685         $hash ||= $hash_base || "HEAD";
7686         my %co = parse_commit($hash)
7687             or die_error(404, "Unknown commit object");
7688
7689         # choose format for commitdiff for merge
7690         if (! defined $hash_parent && @{$co{'parents'}} > 1) {
7691                 $hash_parent = '--cc';
7692         }
7693         # we need to prepare $formats_nav before almost any parameter munging
7694         my $formats_nav;
7695         if ($format eq 'html') {
7696                 $formats_nav =
7697                         $cgi->a({-href => href(action=>"commitdiff_plain", -replay=>1)},
7698                                 "raw");
7699                 if ($patch_max && @{$co{'parents'}} <= 1) {
7700                         $formats_nav .= " | " .
7701                                 $cgi->a({-href => href(action=>"patch", -replay=>1)},
7702                                         "patch");
7703                 }
7704                 $formats_nav .= diff_style_nav($diff_style, @{$co{'parents'}} > 1);
7705
7706                 if (defined $hash_parent &&
7707                     $hash_parent ne '-c' && $hash_parent ne '--cc') {
7708                         # commitdiff with two commits given
7709                         my $hash_parent_short = $hash_parent;
7710                         if ($hash_parent =~ m/^[0-9a-fA-F]{40}$/) {
7711                                 $hash_parent_short = substr($hash_parent, 0, 7);
7712                         }
7713                         $formats_nav .=
7714                                 ' (from';
7715                         for (my $i = 0; $i < @{$co{'parents'}}; $i++) {
7716                                 if ($co{'parents'}[$i] eq $hash_parent) {
7717                                         $formats_nav .= ' parent ' . ($i+1);
7718                                         last;
7719                                 }
7720                         }
7721                         $formats_nav .= ': ' .
7722                                 $cgi->a({-href => href(-replay=>1,
7723                                                        hash=>$hash_parent, hash_base=>undef)},
7724                                         esc_html($hash_parent_short)) .
7725                                 ')';
7726                 } elsif (!$co{'parent'}) {
7727                         # --root commitdiff
7728                         $formats_nav .= ' (initial)';
7729                 } elsif (scalar @{$co{'parents'}} == 1) {
7730                         # single parent commit
7731                         $formats_nav .=
7732                                 ' (parent: ' .
7733                                 $cgi->a({-href => href(-replay=>1,
7734                                                        hash=>$co{'parent'}, hash_base=>undef)},
7735                                         esc_html(substr($co{'parent'}, 0, 7))) .
7736                                 ')';
7737                 } else {
7738                         # merge commit
7739                         if ($hash_parent eq '--cc') {
7740                                 $formats_nav .= ' | ' .
7741                                         $cgi->a({-href => href(-replay=>1,
7742                                                                hash=>$hash, hash_parent=>'-c')},
7743                                                 'combined');
7744                         } else { # $hash_parent eq '-c'
7745                                 $formats_nav .= ' | ' .
7746                                         $cgi->a({-href => href(-replay=>1,
7747                                                                hash=>$hash, hash_parent=>'--cc')},
7748                                                 'compact');
7749                         }
7750                         $formats_nav .=
7751                                 ' (merge: ' .
7752                                 join(' ', map {
7753                                         $cgi->a({-href => href(-replay=>1,
7754                                                                hash=>$_, hash_base=>undef)},
7755                                                 esc_html(substr($_, 0, 7)));
7756                                 } @{$co{'parents'}} ) .
7757                                 ')';
7758                 }
7759         }
7760
7761         my $hash_parent_param = $hash_parent;
7762         if (!defined $hash_parent_param) {
7763                 # --cc for multiple parents, --root for parentless
7764                 $hash_parent_param =
7765                         @{$co{'parents'}} > 1 ? '--cc' : $co{'parent'} || '--root';
7766         }
7767
7768         # read commitdiff
7769         my $fd;
7770         my @difftree;
7771         if ($format eq 'html') {
7772                 open $fd, "-|", git_cmd(), "diff-tree", '-r', @diff_opts,
7773                         "--no-commit-id", "--patch-with-raw", "--full-index",
7774                         $hash_parent_param, $hash, "--"
7775                         or die_error(500, "Open git-diff-tree failed");
7776
7777                 while (my $line = <$fd>) {
7778                         chomp $line;
7779                         # empty line ends raw part of diff-tree output
7780                         last unless $line;
7781                         push @difftree, scalar parse_difftree_raw_line($line);
7782                 }
7783
7784         } elsif ($format eq 'plain') {
7785                 open $fd, "-|", git_cmd(), "diff-tree", '-r', @diff_opts,
7786                         '-p', $hash_parent_param, $hash, "--"
7787                         or die_error(500, "Open git-diff-tree failed");
7788         } elsif ($format eq 'patch') {
7789                 # For commit ranges, we limit the output to the number of
7790                 # patches specified in the 'patches' feature.
7791                 # For single commits, we limit the output to a single patch,
7792                 # diverging from the git-format-patch default.
7793                 my @commit_spec = ();
7794                 if ($hash_parent) {
7795                         if ($patch_max > 0) {
7796                                 push @commit_spec, "-$patch_max";
7797                         }
7798                         push @commit_spec, '-n', "$hash_parent..$hash";
7799                 } else {
7800                         if ($params{-single}) {
7801                                 push @commit_spec, '-1';
7802                         } else {
7803                                 if ($patch_max > 0) {
7804                                         push @commit_spec, "-$patch_max";
7805                                 }
7806                                 push @commit_spec, "-n";
7807                         }
7808                         push @commit_spec, '--root', $hash;
7809                 }
7810                 open $fd, "-|", git_cmd(), "format-patch", @diff_opts,
7811                         '--encoding=utf8', '--stdout', @commit_spec
7812                         or die_error(500, "Open git-format-patch failed");
7813         } else {
7814                 die_error(400, "Unknown commitdiff format");
7815         }
7816
7817         # non-textual hash id's can be cached
7818         my $expires;
7819         if ($hash =~ m/^[0-9a-fA-F]{40}$/) {
7820                 $expires = "+1d";
7821         }
7822
7823         # write commit message
7824         if ($format eq 'html') {
7825                 my $refs = git_get_references();
7826                 my $ref = format_ref_marker($refs, $co{'id'});
7827
7828                 git_header_html(undef, $expires);
7829                 git_print_page_nav('commitdiff','', $hash,$co{'tree'},$hash, $formats_nav);
7830                 git_print_header_div('commit', esc_html($co{'title'}) . $ref, $hash);
7831                 print "<div class=\"title_text\">\n" .
7832                       "<table class=\"object_header\">\n";
7833                 git_print_authorship_rows(\%co);
7834                 print "</table>".
7835                       "</div>\n";
7836                 print "<div class=\"page_body\">\n";
7837                 if (@{$co{'comment'}} > 1) {
7838                         print "<div class=\"log\">\n";
7839                         git_print_log($co{'comment'}, -final_empty_line=> 1, -remove_title => 1);
7840                         print "</div>\n"; # class="log"
7841                 }
7842
7843         } elsif ($format eq 'plain') {
7844                 my $refs = git_get_references("tags");
7845                 my $tagname = git_get_rev_name_tags($hash);
7846                 my $filename = basename($project) . "-$hash.patch";
7847
7848                 print $cgi->header(
7849                         -type => 'text/plain',
7850                         -charset => 'utf-8',
7851                         -expires => $expires,
7852                         -content_disposition => 'inline; filename="' . "$filename" . '"');
7853                 my %ad = parse_date($co{'author_epoch'}, $co{'author_tz'});
7854                 print "From: " . to_utf8($co{'author'}) . "\n";
7855                 print "Date: $ad{'rfc2822'} ($ad{'tz_local'})\n";
7856                 print "Subject: " . to_utf8($co{'title'}) . "\n";
7857
7858                 print "X-Git-Tag: $tagname\n" if $tagname;
7859                 print "X-Git-Url: " . $cgi->self_url() . "\n\n";
7860
7861                 foreach my $line (@{$co{'comment'}}) {
7862                         print to_utf8($line) . "\n";
7863                 }
7864                 print "---\n\n";
7865         } elsif ($format eq 'patch') {
7866                 my $filename = basename($project) . "-$hash.patch";
7867
7868                 print $cgi->header(
7869                         -type => 'text/plain',
7870                         -charset => 'utf-8',
7871                         -expires => $expires,
7872                         -content_disposition => 'inline; filename="' . "$filename" . '"');
7873         }
7874
7875         # write patch
7876         if ($format eq 'html') {
7877                 my $use_parents = !defined $hash_parent ||
7878                         $hash_parent eq '-c' || $hash_parent eq '--cc';
7879                 git_difftree_body(\@difftree, $hash,
7880                                   $use_parents ? @{$co{'parents'}} : $hash_parent);
7881                 print "<br/>\n";
7882
7883                 git_patchset_body($fd, $diff_style,
7884                                   \@difftree, $hash,
7885                                   $use_parents ? @{$co{'parents'}} : $hash_parent);
7886                 close $fd;
7887                 print "</div>\n"; # class="page_body"
7888                 git_footer_html();
7889
7890         } elsif ($format eq 'plain') {
7891                 local $/ = undef;
7892                 print <$fd>;
7893                 close $fd
7894                         or print "Reading git-diff-tree failed\n";
7895         } elsif ($format eq 'patch') {
7896                 local $/ = undef;
7897                 print <$fd>;
7898                 close $fd
7899                         or print "Reading git-format-patch failed\n";
7900         }
7901 }
7902
7903 sub git_commitdiff_plain {
7904         git_commitdiff(-format => 'plain');
7905 }
7906
7907 # format-patch-style patches
7908 sub git_patch {
7909         git_commitdiff(-format => 'patch', -single => 1);
7910 }
7911
7912 sub git_patches {
7913         git_commitdiff(-format => 'patch');
7914 }
7915
7916 sub git_history {
7917         git_log_generic('history', \&git_history_body,
7918                         $hash_base, $hash_parent_base,
7919                         $file_name, $hash);
7920 }
7921
7922 sub git_search {
7923         $searchtype ||= 'commit';
7924
7925         # check if appropriate features are enabled
7926         gitweb_check_feature('search')
7927                 or die_error(403, "Search is disabled");
7928         if ($searchtype eq 'pickaxe') {
7929                 # pickaxe may take all resources of your box and run for several minutes
7930                 # with every query - so decide by yourself how public you make this feature
7931                 gitweb_check_feature('pickaxe')
7932                         or die_error(403, "Pickaxe search is disabled");
7933         }
7934         if ($searchtype eq 'grep') {
7935                 # grep search might be potentially CPU-intensive, too
7936                 gitweb_check_feature('grep')
7937                         or die_error(403, "Grep search is disabled");
7938         }
7939
7940         if (!defined $searchtext) {
7941                 die_error(400, "Text field is empty");
7942         }
7943         if (!defined $hash) {
7944                 $hash = git_get_head_hash($project);
7945         }
7946         my %co = parse_commit($hash);
7947         if (!%co) {
7948                 die_error(404, "Unknown commit object");
7949         }
7950         if (!defined $page) {
7951                 $page = 0;
7952         }
7953
7954         if ($searchtype eq 'commit' ||
7955             $searchtype eq 'author' ||
7956             $searchtype eq 'committer') {
7957                 git_search_message(%co);
7958         } elsif ($searchtype eq 'pickaxe') {
7959                 git_search_changes(%co);
7960         } elsif ($searchtype eq 'grep') {
7961                 git_search_files(%co);
7962         } else {
7963                 die_error(400, "Unknown search type");
7964         }
7965 }
7966
7967 sub git_search_help {
7968         git_header_html();
7969         git_print_page_nav('','', $hash,$hash,$hash);
7970         print <<EOT;
7971 <p><strong>Pattern</strong> is by default a normal string that is matched precisely (but without
7972 regard to case, except in the case of pickaxe). However, when you check the <em>re</em> checkbox,
7973 the pattern entered is recognized as the POSIX extended
7974 <a href="http://en.wikipedia.org/wiki/Regular_expression">regular expression</a> (also case
7975 insensitive).</p>
7976 <dl>
7977 <dt><b>commit</b></dt>
7978 <dd>The commit messages and authorship information will be scanned for the given pattern.</dd>
7979 EOT
7980         my $have_grep = gitweb_check_feature('grep');
7981         if ($have_grep) {
7982                 print <<EOT;
7983 <dt><b>grep</b></dt>
7984 <dd>All files in the currently selected tree (HEAD unless you are explicitly browsing
7985     a different one) are searched for the given pattern. On large trees, this search can take
7986 a while and put some strain on the server, so please use it with some consideration. Note that
7987 due to git-grep peculiarity, currently if regexp mode is turned off, the matches are
7988 case-sensitive.</dd>
7989 EOT
7990         }
7991         print <<EOT;
7992 <dt><b>author</b></dt>
7993 <dd>Name and e-mail of the change author and date of birth of the patch will be scanned for the given pattern.</dd>
7994 <dt><b>committer</b></dt>
7995 <dd>Name and e-mail of the committer and date of commit will be scanned for the given pattern.</dd>
7996 EOT
7997         my $have_pickaxe = gitweb_check_feature('pickaxe');
7998         if ($have_pickaxe) {
7999                 print <<EOT;
8000 <dt><b>pickaxe</b></dt>
8001 <dd>All commits that caused the string to appear or disappear from any file (changes that
8002 added, removed or "modified" the string) will be listed. This search can take a while and
8003 takes a lot of strain on the server, so please use it wisely. Note that since you may be
8004 interested even in changes just changing the case as well, this search is case sensitive.</dd>
8005 EOT
8006         }
8007         print "</dl>\n";
8008         git_footer_html();
8009 }
8010
8011 sub git_shortlog {
8012         git_log_generic('shortlog', \&git_shortlog_body,
8013                         $hash, $hash_parent);
8014 }
8015
8016 ## ......................................................................
8017 ## feeds (RSS, Atom; OPML)
8018
8019 sub git_feed {
8020         my $format = shift || 'atom';
8021         my $have_blame = gitweb_check_feature('blame');
8022
8023         # Atom: http://www.atomenabled.org/developers/syndication/
8024         # RSS:  http://www.notestips.com/80256B3A007F2692/1/NAMO5P9UPQ
8025         if ($format ne 'rss' && $format ne 'atom') {
8026                 die_error(400, "Unknown web feed format");
8027         }
8028
8029         # log/feed of current (HEAD) branch, log of given branch, history of file/directory
8030         my $head = $hash || 'HEAD';
8031         my @commitlist = parse_commits($head, 150, 0, $file_name);
8032
8033         my %latest_commit;
8034         my %latest_date;
8035         my $content_type = "application/$format+xml";
8036         if (defined $cgi->http('HTTP_ACCEPT') &&
8037                  $cgi->Accept('text/xml') > $cgi->Accept($content_type)) {
8038                 # browser (feed reader) prefers text/xml
8039                 $content_type = 'text/xml';
8040         }
8041         if (defined($commitlist[0])) {
8042                 %latest_commit = %{$commitlist[0]};
8043                 my $latest_epoch = $latest_commit{'committer_epoch'};
8044                 exit_if_unmodified_since($latest_epoch);
8045                 %latest_date = parse_date($latest_epoch, $latest_commit{'committer_tz'});
8046         }
8047         print $cgi->header(
8048                 -type => $content_type,
8049                 -charset => 'utf-8',
8050                 %latest_date ? (-last_modified => $latest_date{'rfc2822'}) : (),
8051                 -status => '200 OK');
8052
8053         # Optimization: skip generating the body if client asks only
8054         # for Last-Modified date.
8055         return if ($cgi->request_method() eq 'HEAD');
8056
8057         # header variables
8058         my $title = "$site_name - $project/$action";
8059         my $feed_type = 'log';
8060         if (defined $hash) {
8061                 $title .= " - '$hash'";
8062                 $feed_type = 'branch log';
8063                 if (defined $file_name) {
8064                         $title .= " :: $file_name";
8065                         $feed_type = 'history';
8066                 }
8067         } elsif (defined $file_name) {
8068                 $title .= " - $file_name";
8069                 $feed_type = 'history';
8070         }
8071         $title .= " $feed_type";
8072         $title = esc_html($title);
8073         my $descr = git_get_project_description($project);
8074         if (defined $descr) {
8075                 $descr = esc_html($descr);
8076         } else {
8077                 $descr = "$project " .
8078                          ($format eq 'rss' ? 'RSS' : 'Atom') .
8079                          " feed";
8080         }
8081         my $owner = git_get_project_owner($project);
8082         $owner = esc_html($owner);
8083
8084         #header
8085         my $alt_url;
8086         if (defined $file_name) {
8087                 $alt_url = href(-full=>1, action=>"history", hash=>$hash, file_name=>$file_name);
8088         } elsif (defined $hash) {
8089                 $alt_url = href(-full=>1, action=>"log", hash=>$hash);
8090         } else {
8091                 $alt_url = href(-full=>1, action=>"summary");
8092         }
8093         print qq!<?xml version="1.0" encoding="utf-8"?>\n!;
8094         if ($format eq 'rss') {
8095                 print <<XML;
8096 <rss version="2.0" xmlns:content="http://purl.org/rss/1.0/modules/content/">
8097 <channel>
8098 XML
8099                 print "<title>$title</title>\n" .
8100                       "<link>$alt_url</link>\n" .
8101                       "<description>$descr</description>\n" .
8102                       "<language>en</language>\n" .
8103                       # project owner is responsible for 'editorial' content
8104                       "<managingEditor>$owner</managingEditor>\n";
8105                 if (defined $logo || defined $favicon) {
8106                         # prefer the logo to the favicon, since RSS
8107                         # doesn't allow both
8108                         my $img = esc_url($logo || $favicon);
8109                         print "<image>\n" .
8110                               "<url>$img</url>\n" .
8111                               "<title>$title</title>\n" .
8112                               "<link>$alt_url</link>\n" .
8113                               "</image>\n";
8114                 }
8115                 if (%latest_date) {
8116                         print "<pubDate>$latest_date{'rfc2822'}</pubDate>\n";
8117                         print "<lastBuildDate>$latest_date{'rfc2822'}</lastBuildDate>\n";
8118                 }
8119                 print "<generator>gitweb v.$version/$git_version</generator>\n";
8120         } elsif ($format eq 'atom') {
8121                 print <<XML;
8122 <feed xmlns="http://www.w3.org/2005/Atom">
8123 XML
8124                 print "<title>$title</title>\n" .
8125                       "<subtitle>$descr</subtitle>\n" .
8126                       '<link rel="alternate" type="text/html" href="' .
8127                       $alt_url . '" />' . "\n" .
8128                       '<link rel="self" type="' . $content_type . '" href="' .
8129                       $cgi->self_url() . '" />' . "\n" .
8130                       "<id>" . href(-full=>1) . "</id>\n" .
8131                       # use project owner for feed author
8132                       "<author><name>$owner</name></author>\n";
8133                 if (defined $favicon) {
8134                         print "<icon>" . esc_url($favicon) . "</icon>\n";
8135                 }
8136                 if (defined $logo) {
8137                         # not twice as wide as tall: 72 x 27 pixels
8138                         print "<logo>" . esc_url($logo) . "</logo>\n";
8139                 }
8140                 if (! %latest_date) {
8141                         # dummy date to keep the feed valid until commits trickle in:
8142                         print "<updated>1970-01-01T00:00:00Z</updated>\n";
8143                 } else {
8144                         print "<updated>$latest_date{'iso-8601'}</updated>\n";
8145                 }
8146                 print "<generator version='$version/$git_version'>gitweb</generator>\n";
8147         }
8148
8149         # contents
8150         for (my $i = 0; $i <= $#commitlist; $i++) {
8151                 my %co = %{$commitlist[$i]};
8152                 my $commit = $co{'id'};
8153                 # we read 150, we always show 30 and the ones more recent than 48 hours
8154                 if (($i >= 20) && ((time - $co{'author_epoch'}) > 48*60*60)) {
8155                         last;
8156                 }
8157                 my %cd = parse_date($co{'author_epoch'}, $co{'author_tz'});
8158
8159                 # get list of changed files
8160                 open my $fd, "-|", git_cmd(), "diff-tree", '-r', @diff_opts,
8161                         $co{'parent'} || "--root",
8162                         $co{'id'}, "--", (defined $file_name ? $file_name : ())
8163                         or next;
8164                 my @difftree = map { chomp; $_ } <$fd>;
8165                 close $fd
8166                         or next;
8167
8168                 # print element (entry, item)
8169                 my $co_url = href(-full=>1, action=>"commitdiff", hash=>$commit);
8170                 if ($format eq 'rss') {
8171                         print "<item>\n" .
8172                               "<title>" . esc_html($co{'title'}) . "</title>\n" .
8173                               "<author>" . esc_html($co{'author'}) . "</author>\n" .
8174                               "<pubDate>$cd{'rfc2822'}</pubDate>\n" .
8175                               "<guid isPermaLink=\"true\">$co_url</guid>\n" .
8176                               "<link>$co_url</link>\n" .
8177                               "<description>" . esc_html($co{'title'}) . "</description>\n" .
8178                               "<content:encoded>" .
8179                               "<![CDATA[\n";
8180                 } elsif ($format eq 'atom') {
8181                         print "<entry>\n" .
8182                               "<title type=\"html\">" . esc_html($co{'title'}) . "</title>\n" .
8183                               "<updated>$cd{'iso-8601'}</updated>\n" .
8184                               "<author>\n" .
8185                               "  <name>" . esc_html($co{'author_name'}) . "</name>\n";
8186                         if ($co{'author_email'}) {
8187                                 print "  <email>" . esc_html($co{'author_email'}) . "</email>\n";
8188                         }
8189                         print "</author>\n" .
8190                               # use committer for contributor
8191                               "<contributor>\n" .
8192                               "  <name>" . esc_html($co{'committer_name'}) . "</name>\n";
8193                         if ($co{'committer_email'}) {
8194                                 print "  <email>" . esc_html($co{'committer_email'}) . "</email>\n";
8195                         }
8196                         print "</contributor>\n" .
8197                               "<published>$cd{'iso-8601'}</published>\n" .
8198                               "<link rel=\"alternate\" type=\"text/html\" href=\"$co_url\" />\n" .
8199                               "<id>$co_url</id>\n" .
8200                               "<content type=\"xhtml\" xml:base=\"" . esc_url($my_url) . "\">\n" .
8201                               "<div xmlns=\"http://www.w3.org/1999/xhtml\">\n";
8202                 }
8203                 my $comment = $co{'comment'};
8204                 print "<pre>\n";
8205                 foreach my $line (@$comment) {
8206                         $line = esc_html($line);
8207                         print "$line\n";
8208                 }
8209                 print "</pre><ul>\n";
8210                 foreach my $difftree_line (@difftree) {
8211                         my %difftree = parse_difftree_raw_line($difftree_line);
8212                         next if !$difftree{'from_id'};
8213
8214                         my $file = $difftree{'file'} || $difftree{'to_file'};
8215
8216                         print "<li>" .
8217                               "[" .
8218                               $cgi->a({-href => href(-full=>1, action=>"blobdiff",
8219                                                      hash=>$difftree{'to_id'}, hash_parent=>$difftree{'from_id'},
8220                                                      hash_base=>$co{'id'}, hash_parent_base=>$co{'parent'},
8221                                                      file_name=>$file, file_parent=>$difftree{'from_file'}),
8222                                       -title => "diff"}, 'D');
8223                         if ($have_blame) {
8224                                 print $cgi->a({-href => href(-full=>1, action=>"blame",
8225                                                              file_name=>$file, hash_base=>$commit),
8226                                               -title => "blame"}, 'B');
8227                         }
8228                         # if this is not a feed of a file history
8229                         if (!defined $file_name || $file_name ne $file) {
8230                                 print $cgi->a({-href => href(-full=>1, action=>"history",
8231                                                              file_name=>$file, hash=>$commit),
8232                                               -title => "history"}, 'H');
8233                         }
8234                         $file = esc_path($file);
8235                         print "] ".
8236                               "$file</li>\n";
8237                 }
8238                 if ($format eq 'rss') {
8239                         print "</ul>]]>\n" .
8240                               "</content:encoded>\n" .
8241                               "</item>\n";
8242                 } elsif ($format eq 'atom') {
8243                         print "</ul>\n</div>\n" .
8244                               "</content>\n" .
8245                               "</entry>\n";
8246                 }
8247         }
8248
8249         # end of feed
8250         if ($format eq 'rss') {
8251                 print "</channel>\n</rss>\n";
8252         } elsif ($format eq 'atom') {
8253                 print "</feed>\n";
8254         }
8255 }
8256
8257 sub git_rss {
8258         git_feed('rss');
8259 }
8260
8261 sub git_atom {
8262         git_feed('atom');
8263 }
8264
8265 sub git_opml {
8266         my @list = git_get_projects_list($project_filter, $strict_export);
8267         if (!@list) {
8268                 die_error(404, "No projects found");
8269         }
8270
8271         print $cgi->header(
8272                 -type => 'text/xml',
8273                 -charset => 'utf-8',
8274                 -content_disposition => 'inline; filename="opml.xml"');
8275
8276         my $title = esc_html($site_name);
8277         my $filter = " within subdirectory ";
8278         if (defined $project_filter) {
8279                 $filter .= esc_html($project_filter);
8280         } else {
8281                 $filter = "";
8282         }
8283         print <<XML;
8284 <?xml version="1.0" encoding="utf-8"?>
8285 <opml version="1.0">
8286 <head>
8287   <title>$title OPML Export$filter</title>
8288 </head>
8289 <body>
8290 <outline text="git RSS feeds">
8291 XML
8292
8293         foreach my $pr (@list) {
8294                 my %proj = %$pr;
8295                 my $head = git_get_head_hash($proj{'path'});
8296                 if (!defined $head) {
8297                         next;
8298                 }
8299                 $git_dir = "$projectroot/$proj{'path'}";
8300                 my %co = parse_commit($head);
8301                 if (!%co) {
8302                         next;
8303                 }
8304
8305                 my $path = esc_html(chop_str($proj{'path'}, 25, 5));
8306                 my $rss  = href('project' => $proj{'path'}, 'action' => 'rss', -full => 1);
8307                 my $html = href('project' => $proj{'path'}, 'action' => 'summary', -full => 1);
8308                 print "<outline type=\"rss\" text=\"$path\" title=\"$path\" xmlUrl=\"$rss\" htmlUrl=\"$html\"/>\n";
8309         }
8310         print <<XML;
8311 </outline>
8312 </body>
8313 </opml>
8314 XML
8315 }