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 if (!defined($CGI::VERSION) || $CGI::VERSION < 4.08) {
  24         eval 'sub CGI::multi_param { CGI::param(@_) }'
  25 }
  26
  27 our $t0 = [ gettimeofday() ];
  28 our $number_of_git_cmds = 0;
  29
  30 BEGIN {
  31         CGI->compile() if $ENV{'MOD_PERL'};
  32 }
  33
  34 our $version = "++GIT_VERSION++";
  35
  36 our ($my_url, $my_uri, $base_url, $path_info, $home_link);
  37 sub evaluate_uri {
  38         our $cgi;
  39
  40         our $my_url = $cgi->url();
  41         our $my_uri = $cgi->url(-absolute => 1);
  42
  43         # Base URL for relative URLs in gitweb ($logo, $favicon, ...),
  44         # needed and used only for URLs with nonempty PATH_INFO
  45         our $base_url = $my_url;
  46
  47         # When the script is used as DirectoryIndex, the URL does not contain the name
  48         # of the script file itself, and $cgi->url() fails to strip PATH_INFO, so we
  49         # have to do it ourselves. We make $path_info global because it's also used
  50         # later on.
  51         #
  52         # Another issue with the script being the DirectoryIndex is that the resulting
  53         # $my_url data is not the full script URL: this is good, because we want
  54         # generated links to keep implying the script name if it wasn't explicitly
  55         # indicated in the URL we're handling, but it means that $my_url cannot be used
  56         # as base URL.
  57         # Therefore, if we needed to strip PATH_INFO, then we know that we have
  58         # to build the base URL ourselves:
  59         our $path_info = decode_utf8($ENV{"PATH_INFO"});
  60         if ($path_info) {
  61                 # $path_info has already been URL-decoded by the web server, but
  62                 # $my_url and $my_uri have not. URL-decode them so we can properly
  63                 # strip $path_info.
  64                 $my_url = unescape($my_url);
  65                 $my_uri = unescape($my_uri);
  66                 if ($my_url =~ s,\Q$path_info\E$,, &&
  67                     $my_uri =~ s,\Q$path_info\E$,, &&
  68                     defined $ENV{'SCRIPT_NAME'}) {
  69                         $base_url = $cgi->url(-base => 1) . $ENV{'SCRIPT_NAME'};
  70                 }
  71         }
  72
  73         # target of the home link on top of all pages
  74         our $home_link = $my_uri || "/";
  75 }
  76
  77 # core git executable to use
  78 # this can just be "git" if your webserver has a sensible PATH
  79 our $GIT = "++GIT_BINDIR++/git";
  80
  81 # absolute fs-path which will be prepended to the project path
  82 #our $projectroot = "/pub/scm";
  83 our $projectroot = "++GITWEB_PROJECTROOT++";
  84
  85 # fs traversing limit for getting project list
  86 # the number is relative to the projectroot
  87 our $project_maxdepth = "++GITWEB_PROJECT_MAXDEPTH++";
  88
  89 # string of the home link on top of all pages
  90 our $home_link_str = "++GITWEB_HOME_LINK_STR++";
  91
  92 # extra breadcrumbs preceding the home link
  93 our @extra_breadcrumbs = ();
  94
  95 # name of your site or organization to appear in page titles
  96 # replace this with something more descriptive for clearer bookmarks
  97 our $site_name = "++GITWEB_SITENAME++"
  98                  || ($ENV{'SERVER_NAME'} || "Untitled") . " Git";
  99
 100 # html snippet to include in the <head> section of each page
 101 our $site_html_head_string = "++GITWEB_SITE_HTML_HEAD_STRING++";
 102 # filename of html text to include at top of each page
 103 our $site_header = "++GITWEB_SITE_HEADER++";
 104 # html text to include at home page
 105 our $home_text = "++GITWEB_HOMETEXT++";
 106 # filename of html text to include at bottom of each page
 107 our $site_footer = "++GITWEB_SITE_FOOTER++";
 108
 109 # URI of stylesheets
 110 our @stylesheets = ("++GITWEB_CSS++");
 111 # URI of a single stylesheet, which can be overridden in GITWEB_CONFIG.
 112 our $stylesheet = undef;
 113 # URI of GIT logo (72x27 size)
 114 our $logo = "++GITWEB_LOGO++";
 115 # URI of GIT favicon, assumed to be image/png type
 116 our $favicon = "++GITWEB_FAVICON++";
 117 # URI of gitweb.js (JavaScript code for gitweb)
 118 our $javascript = "++GITWEB_JS++";
 119
 120 # URI and label (title) of GIT logo link
 121 #our $logo_url = "http://www.kernel.org/pub/software/scm/git/docs/";
 122 #our $logo_label = "git documentation";
 123 our $logo_url = "http://git-scm.com/";
 124 our $logo_label = "git homepage";
 125
 126 # source of projects list
 127 our $projects_list = "++GITWEB_LIST++";
 128
 129 # the width (in characters) of the projects list "Description" column
 130 our $projects_list_description_width = 25;
 131
 132 # group projects by category on the projects list
 133 # (enabled if this variable evaluates to true)
 134 our $projects_list_group_categories = 0;
 135
 136 # default category if none specified
 137 # (leave the empty string for no category)
 138 our $project_list_default_category = "";
 139
 140 # default order of projects list
 141 # valid values are none, project, descr, owner, and age
 142 our $default_projects_order = "project";
 143
 144 # show repository only if this file exists
 145 # (only effective if this variable evaluates to true)
 146 our $export_ok = "++GITWEB_EXPORT_OK++";
 147
 148 # don't generate age column on the projects list page
 149 our $omit_age_column = 0;
 150
 151 # don't generate information about owners of repositories
 152 our $omit_owner=0;
 153
 154 # show repository only if this subroutine returns true
 155 # when given the path to the project, for example:
 156 #    sub { return -e "$_[0]/git-daemon-export-ok"; }
 157 our $export_auth_hook = undef;
 158
 159 # only allow viewing of repositories also shown on the overview page
 160 our $strict_export = "++GITWEB_STRICT_EXPORT++";
 161
 162 # list of git base URLs used for URL to where fetch project from,
 163 # i.e. full URL is "$git_base_url/$project"
 164 our @git_base_url_list = grep { $_ ne '' } ("++GITWEB_BASE_URL++");
 165
 166 # default blob_plain mimetype and default charset for text/plain blob
 167 our $default_blob_plain_mimetype = 'text/plain';
 168 our $default_text_plain_charset  = undef;
 169
 170 # file to use for guessing MIME types before trying /etc/mime.types
 171 # (relative to the current git repository)
 172 our $mimetypes_file = undef;
 173
 174 # assume this charset if line contains non-UTF-8 characters;
 175 # it should be valid encoding (see Encoding::Supported(3pm) for list),
 176 # for which encoding all byte sequences are valid, for example
 177 # 'iso-8859-1' aka 'latin1' (it is decoded without checking, so it
 178 # could be even 'utf-8' for the old behavior)
 179 our $fallback_encoding = 'latin1';
 180
 181 # rename detection options for git-diff and git-diff-tree
 182 # - default is '-M', with the cost proportional to
 183 #   (number of removed files) * (number of new files).
 184 # - more costly is '-C' (which implies '-M'), with the cost proportional to
 185 #   (number of changed files + number of removed files) * (number of new files)
 186 # - even more costly is '-C', '--find-copies-harder' with cost
 187 #   (number of files in the original tree) * (number of new files)
 188 # - one might want to include '-B' option, e.g. '-B', '-M'
 189 our @diff_opts = ('-M'); # taken from git_commit
 190
 191 # Disables features that would allow repository owners to inject script into
 192 # the gitweb domain.
 193 our $prevent_xss = 0;
 194
 195 # Path to the highlight executable to use (must be the one from
 196 # http://www.andre-simon.de due to assumptions about parameters and output).
 197 # Useful if highlight is not installed on your webserver's PATH.
 198 # [Default: highlight]
 199 our $highlight_bin = "++HIGHLIGHT_BIN++";
 200
 201 # Whether to include project list on the gitweb front page; 0 means yes,
 202 # 1 means no list but show tag cloud if enabled (all projects still need
 203 # to be scanned), 2 means no list and no tag cloud (very fast)
 204 our $frontpage_no_project_list = 0;
 205
 206 # information about snapshot formats that gitweb is capable of serving
 207 our %known_snapshot_formats = (
 208         # name => {
 209         #       'display' => display name,
 210         #       'type' => mime type,
 211         #       'suffix' => filename suffix,
 212         #       'format' => --format for git-archive,
 213         #       'compressor' => [compressor command and arguments]
 214         #                       (array reference, optional)
 215         #       'disabled' => boolean (optional)}
 216         #
 217         'tgz' => {
 218                 'display' => 'tar.gz',
 219                 'type' => 'application/x-gzip',
 220                 'suffix' => '.tar.gz',
 221                 'format' => 'tar',
 222                 'compressor' => ['gzip', '-n']},
 223
 224         'tbz2' => {
 225                 'display' => 'tar.bz2',
 226                 'type' => 'application/x-bzip2',
 227                 'suffix' => '.tar.bz2',
 228                 'format' => 'tar',
 229                 'compressor' => ['bzip2']},
 230
 231         'txz' => {
 232                 'display' => 'tar.xz',
 233                 'type' => 'application/x-xz',
 234                 'suffix' => '.tar.xz',
 235                 'format' => 'tar',
 236                 'compressor' => ['xz'],
 237                 'disabled' => 1},
 238
 239         'zip' => {
 240                 'display' => 'zip',
 241                 'type' => 'application/x-zip',
 242                 'suffix' => '.zip',
 243                 'format' => 'zip'},
 244 );
 245
 246 # Aliases so we understand old gitweb.snapshot values in repository
 247 # configuration.
 248 our %known_snapshot_format_aliases = (
 249         'gzip'  => 'tgz',
 250         'bzip2' => 'tbz2',
 251         'xz'    => 'txz',
 252
 253         # backward compatibility: legacy gitweb config support
 254         'x-gzip' => undef, 'gz' => undef,
 255         'x-bzip2' => undef, 'bz2' => undef,
 256         'x-zip' => undef, '' => undef,
 257 );
 258
 259 # Pixel sizes for icons and avatars. If the default font sizes or lineheights
 260 # are changed, it may be appropriate to change these values too via
 261 # $GITWEB_CONFIG.
 262 our %avatar_size = (
 263         'default' => 16,
 264         'double'  => 32
 265 );
 266
 267 # Used to set the maximum load that we will still respond to gitweb queries.
 268 # If server load exceed this value then return "503 server busy" error.
 269 # If gitweb cannot determined server load, it is taken to be 0.
 270 # Leave it undefined (or set to 'undef') to turn off load checking.
 271 our $maxload = 300;
 272
 273 # configuration for 'highlight' (http://www.andre-simon.de/)
 274 # match by basename
 275 our %highlight_basename = (
 276         #'Program' => 'py',
 277         #'Library' => 'py',
 278         'SConstruct' => 'py', # SCons equivalent of Makefile
 279         'Makefile' => 'make',
 280 );
 281 # match by extension
 282 our %highlight_ext = (
 283         # main extensions, defining name of syntax;
 284         # see files in /usr/share/highlight/langDefs/ directory
 285         (map { $_ => $_ } qw(py rb java css js tex bib xml awk bat ini spec tcl sql)),
 286         # alternate extensions, see /etc/highlight/filetypes.conf
 287         (map { $_ => 'c'   } qw(c h)),
 288         (map { $_ => 'sh'  } qw(sh bash zsh ksh)),
 289         (map { $_ => 'cpp' } qw(cpp cxx c++ cc)),
 290         (map { $_ => 'php' } qw(php php3 php4 php5 phps)),
 291         (map { $_ => 'pl'  } qw(pl perl pm)), # perhaps also 'cgi'
 292         (map { $_ => 'make'} qw(make mak mk)),
 293         (map { $_ => 'xml' } qw(xml xhtml html htm)),
 294 );
 295
 296 # You define site-wide feature defaults here; override them with
 297 # $GITWEB_CONFIG as necessary.
 298 our %feature = (
 299         # feature => {
 300         #       'sub' => feature-sub (subroutine),
 301         #       'override' => allow-override (boolean),
 302         #       'default' => [ default options...] (array reference)}
 303         #
 304         # if feature is overridable (it means that allow-override has true value),
 305         # then feature-sub will be called with default options as parameters;
 306         # return value of feature-sub indicates if to enable specified feature
 307         #
 308         # if there is no 'sub' key (no feature-sub), then feature cannot be
 309         # overridden
 310         #
 311         # use gitweb_get_feature(<feature>) to retrieve the <feature> value
 312         # (an array) or gitweb_check_feature(<feature>) to check if <feature>
 313         # is enabled
 314
 315         # Enable the 'blame' blob view, showing the last commit that modified
 316         # each line in the file. This can be very CPU-intensive.
 317
 318         # To enable system wide have in $GITWEB_CONFIG
 319         # $feature{'blame'}{'default'} = [1];
 320         # To have project specific config enable override in $GITWEB_CONFIG
 321         # $feature{'blame'}{'override'} = 1;
 322         # and in project config gitweb.blame = 0|1;
 323         'blame' => {
 324                 'sub' => sub { feature_bool('blame', @_) },
 325                 'override' => 0,
 326                 'default' => [0]},
 327
 328         # Enable the 'snapshot' link, providing a compressed archive of any
 329         # tree. This can potentially generate high traffic if you have large
 330         # project.
 331
 332         # Value is a list of formats defined in %known_snapshot_formats that
 333         # you wish to offer.
 334         # To disable system wide have in $GITWEB_CONFIG
 335         # $feature{'snapshot'}{'default'} = [];
 336         # To have project specific config enable override in $GITWEB_CONFIG
 337         # $feature{'snapshot'}{'override'} = 1;
 338         # and in project config, a comma-separated list of formats or "none"
 339         # to disable.  Example: gitweb.snapshot = tbz2,zip;
 340         'snapshot' => {
 341                 'sub' => \&feature_snapshot,
 342                 'override' => 0,
 343                 'default' => ['tgz']},
 344
 345         # Enable text search, which will list the commits which match author,
 346         # committer or commit text to a given string.  Enabled by default.
 347         # Project specific override is not supported.
 348         #
 349         # Note that this controls all search features, which means that if
 350         # it is disabled, then 'grep' and 'pickaxe' search would also be
 351         # disabled.
 352         'search' => {
 353                 'override' => 0,
 354                 'default' => [1]},
 355
 356         # Enable grep search, which will list the files in currently selected
 357         # tree containing the given string. Enabled by default. This can be
 358         # potentially CPU-intensive, of course.
 359         # Note that you need to have 'search' feature enabled too.
 360
 361         # To enable system wide have in $GITWEB_CONFIG
 362         # $feature{'grep'}{'default'} = [1];
 363         # To have project specific config enable override in $GITWEB_CONFIG
 364         # $feature{'grep'}{'override'} = 1;
 365         # and in project config gitweb.grep = 0|1;
 366         'grep' => {
 367                 'sub' => sub { feature_bool('grep', @_) },
 368                 'override' => 0,
 369                 'default' => [1]},
 370
 371         # Enable the pickaxe search, which will list the commits that modified
 372         # a given string in a file. This can be practical and quite faster
 373         # alternative to 'blame', but still potentially CPU-intensive.
 374         # Note that you need to have 'search' feature enabled too.
 375
 376         # To enable system wide have in $GITWEB_CONFIG
 377         # $feature{'pickaxe'}{'default'} = [1];
 378         # To have project specific config enable override in $GITWEB_CONFIG
 379         # $feature{'pickaxe'}{'override'} = 1;
 380         # and in project config gitweb.pickaxe = 0|1;
 381         'pickaxe' => {
 382                 'sub' => sub { feature_bool('pickaxe', @_) },
 383                 'override' => 0,
 384                 'default' => [1]},
 385
 386         # Enable showing size of blobs in a 'tree' view, in a separate
 387         # column, similar to what 'ls -l' does.  This cost a bit of IO.
 388
 389         # To disable system wide have in $GITWEB_CONFIG
 390         # $feature{'show-sizes'}{'default'} = [0];
 391         # To have project specific config enable override in $GITWEB_CONFIG
 392         # $feature{'show-sizes'}{'override'} = 1;
 393         # and in project config gitweb.showsizes = 0|1;
 394         'show-sizes' => {
 395                 'sub' => sub { feature_bool('showsizes', @_) },
 396                 'override' => 0,
 397                 'default' => [1]},
 398
 399         # Make gitweb use an alternative format of the URLs which can be
 400         # more readable and natural-looking: project name is embedded
 401         # directly in the path and the query string contains other
 402         # auxiliary information. All gitweb installations recognize
 403         # URL in either format; this configures in which formats gitweb
 404         # generates links.
 405
 406         # To enable system wide have in $GITWEB_CONFIG
 407         # $feature{'pathinfo'}{'default'} = [1];
 408         # Project specific override is not supported.
 409
 410         # Note that you will need to change the default location of CSS,
 411         # favicon, logo and possibly other files to an absolute URL. Also,
 412         # if gitweb.cgi serves as your indexfile, you will need to force
 413         # $my_uri to contain the script name in your $GITWEB_CONFIG.
 414         'pathinfo' => {
 415                 'override' => 0,
 416                 'default' => [0]},
 417
 418         # Make gitweb consider projects in project root subdirectories
 419         # to be forks of existing projects. Given project $projname.git,
 420         # projects matching $projname/*.git will not be shown in the main
 421         # projects list, instead a '+' mark will be added to $projname
 422         # there and a 'forks' view will be enabled for the project, listing
 423         # all the forks. If project list is taken from a file, forks have
 424         # to be listed after the main project.
 425
 426         # To enable system wide have in $GITWEB_CONFIG
 427         # $feature{'forks'}{'default'} = [1];
 428         # Project specific override is not supported.
 429         'forks' => {
 430                 'override' => 0,
 431                 'default' => [0]},
 432
 433         # Insert custom links to the action bar of all project pages.
 434         # This enables you mainly to link to third-party scripts integrating
 435         # into gitweb; e.g. git-browser for graphical history representation
 436         # or custom web-based repository administration interface.
 437
 438         # The 'default' value consists of a list of triplets in the form
 439         # (label, link, position) where position is the label after which
 440         # to insert the link and link is a format string where %n expands
 441         # to the project name, %f to the project path within the filesystem,
 442         # %h to the current hash (h gitweb parameter) and %b to the current
 443         # hash base (hb gitweb parameter); %% expands to %.
 444
 445         # To enable system wide have in $GITWEB_CONFIG e.g.
 446         # $feature{'actions'}{'default'} = [('graphiclog',
 447         #       '/git-browser/by-commit.html?r=%n', 'summary')];
 448         # Project specific override is not supported.
 449         'actions' => {
 450                 'override' => 0,
 451                 'default' => []},
 452
 453         # Allow gitweb scan project content tags of project repository,
 454         # and display the popular Web 2.0-ish "tag cloud" near the projects
 455         # list.  Note that this is something COMPLETELY different from the
 456         # normal Git tags.
 457
 458         # gitweb by itself can show existing tags, but it does not handle
 459         # tagging itself; you need to do it externally, outside gitweb.
 460         # The format is described in git_get_project_ctags() subroutine.
 461         # You may want to install the HTML::TagCloud Perl module to get
 462         # a pretty tag cloud instead of just a list of tags.
 463
 464         # To enable system wide have in $GITWEB_CONFIG
 465         # $feature{'ctags'}{'default'} = [1];
 466         # Project specific override is not supported.
 467
 468         # A value of 0 means no ctags display or editing.  A value of
 469         # 1 enables ctags display but never editing.  A non-empty value
 470         # that is not a string of digits enables ctags display AND the
 471         # ability to add tags using a form that uses method POST and
 472         # an action value set to the configured 'ctags' value.
 473         'ctags' => {
 474                 'override' => 0,
 475                 'default' => [0]},
 476
 477         # The maximum number of patches in a patchset generated in patch
 478         # view. Set this to 0 or undef to disable patch view, or to a
 479         # negative number to remove any limit.
 480
 481         # To disable system wide have in $GITWEB_CONFIG
 482         # $feature{'patches'}{'default'} = [0];
 483         # To have project specific config enable override in $GITWEB_CONFIG
 484         # $feature{'patches'}{'override'} = 1;
 485         # and in project config gitweb.patches = 0|n;
 486         # where n is the maximum number of patches allowed in a patchset.
 487         'patches' => {
 488                 'sub' => \&feature_patches,
 489                 'override' => 0,
 490                 'default' => [16]},
 491
 492         # Avatar support. When this feature is enabled, views such as
 493         # shortlog or commit will display an avatar associated with
 494         # the email of the committer(s) and/or author(s).
 495
 496         # Currently available providers are gravatar and picon.
 497         # If an unknown provider is specified, the feature is disabled.
 498
 499         # Gravatar depends on Digest::MD5.
 500         # Picon currently relies on the indiana.edu database.
 501
 502         # To enable system wide have in $GITWEB_CONFIG
 503         # $feature{'avatar'}{'default'} = ['<provider>'];
 504         # where <provider> is either gravatar or picon.
 505         # To have project specific config enable override in $GITWEB_CONFIG
 506         # $feature{'avatar'}{'override'} = 1;
 507         # and in project config gitweb.avatar = <provider>;
 508         'avatar' => {
 509                 'sub' => \&feature_avatar,
 510                 'override' => 0,
 511                 'default' => ['']},
 512
 513         # Enable displaying how much time and how many git commands
 514         # it took to generate and display page.  Disabled by default.
 515         # Project specific override is not supported.
 516         'timed' => {
 517                 'override' => 0,
 518                 'default' => [0]},
 519
 520         # Enable turning some links into links to actions which require
 521         # JavaScript to run (like 'blame_incremental').  Not enabled by
 522         # default.  Project specific override is currently not supported.
 523         'javascript-actions' => {
 524                 'override' => 0,
 525                 'default' => [0]},
 526
 527         # Enable and configure ability to change common timezone for dates
 528         # in gitweb output via JavaScript.  Enabled by default.
 529         # Project specific override is not supported.
 530         'javascript-timezone' => {
 531                 'override' => 0,
 532                 'default' => [
 533                         'local',     # default timezone: 'utc', 'local', or '(-|+)HHMM' format,
 534                                      # or undef to turn off this feature
 535                         'gitweb_tz', # name of cookie where to store selected timezone
 536                         'datetime',  # CSS class used to mark up dates for manipulation
 537                 ]},
 538
 539         # Syntax highlighting support. This is based on Daniel Svensson's
 540         # and Sham Chukoury's work in gitweb-xmms2.git.
 541         # It requires the 'highlight' program present in $PATH,
 542         # and therefore is disabled by default.
 543
 544         # To enable system wide have in $GITWEB_CONFIG
 545         # $feature{'highlight'}{'default'} = [1];
 546
 547         'highlight' => {
 548                 'sub' => sub { feature_bool('highlight', @_) },
 549                 'override' => 0,
 550                 'default' => [0]},
 551
 552         # Enable displaying of remote heads in the heads list
 553
 554         # To enable system wide have in $GITWEB_CONFIG
 555         # $feature{'remote_heads'}{'default'} = [1];
 556         # To have project specific config enable override in $GITWEB_CONFIG
 557         # $feature{'remote_heads'}{'override'} = 1;
 558         # and in project config gitweb.remoteheads = 0|1;
 559         'remote_heads' => {
 560                 'sub' => sub { feature_bool('remote_heads', @_) },
 561                 'override' => 0,
 562                 'default' => [0]},
 563
 564         # Enable showing branches under other refs in addition to heads
 565
 566         # To set system wide extra branch refs have in $GITWEB_CONFIG
 567         # $feature{'extra-branch-refs'}{'default'} = ['dirs', 'of', 'choice'];
 568         # To have project specific config enable override in $GITWEB_CONFIG
 569         # $feature{'extra-branch-refs'}{'override'} = 1;
 570         # and in project config gitweb.extrabranchrefs = dirs of choice
 571         # Every directory is separated with whitespace.
 572
 573         'extra-branch-refs' => {
 574                 'sub' => \&feature_extra_branch_refs,
 575                 'override' => 0,
 576                 'default' => []},
 577 );
 578
 579 sub gitweb_get_feature {
 580         my ($name) = @_;
 581         return unless exists $feature{$name};
 582         my ($sub, $override, @defaults) = (
 583                 $feature{$name}{'sub'},
 584                 $feature{$name}{'override'},
 585                 @{$feature{$name}{'default'}});
 586         # project specific override is possible only if we have project
 587         our $git_dir; # global variable, declared later
 588         if (!$override || !defined $git_dir) {
 589                 return @defaults;
 590         }
 591         if (!defined $sub) {
 592                 warn "feature $name is not overridable";
 593                 return @defaults;
 594         }
 595         return $sub->(@defaults);
 596 }
 597
 598 # A wrapper to check if a given feature is enabled.
 599 # With this, you can say
 600 #
 601 #   my $bool_feat = gitweb_check_feature('bool_feat');
 602 #   gitweb_check_feature('bool_feat') or somecode;
 603 #
 604 # instead of
 605 #
 606 #   my ($bool_feat) = gitweb_get_feature('bool_feat');
 607 #   (gitweb_get_feature('bool_feat'))[0] or somecode;
 608 #
 609 sub gitweb_check_feature {
 610         return (gitweb_get_feature(@_))[0];
 611 }
 612
 613
 614 sub feature_bool {
 615         my $key = shift;
 616         my ($val) = git_get_project_config($key, '--bool');
 617
 618         if (!defined $val) {
 619                 return ($_[0]);
 620         } elsif ($val eq 'true') {
 621                 return (1);
 622         } elsif ($val eq 'false') {
 623                 return (0);
 624         }
 625 }
 626
 627 sub feature_snapshot {
 628         my (@fmts) = @_;
 629
 630         my ($val) = git_get_project_config('snapshot');
 631
 632         if ($val) {
 633                 @fmts = ($val eq 'none' ? () : split /\s*[,\s]\s*/, $val);
 634         }
 635
 636         return @fmts;
 637 }
 638
 639 sub feature_patches {
 640         my @val = (git_get_project_config('patches', '--int'));
 641
 642         if (@val) {
 643                 return @val;
 644         }
 645
 646         return ($_[0]);
 647 }
 648
 649 sub feature_avatar {
 650         my @val = (git_get_project_config('avatar'));
 651
 652         return @val ? @val : @_;
 653 }
 654
 655 sub feature_extra_branch_refs {
 656         my (@branch_refs) = @_;
 657         my $values = git_get_project_config('extrabranchrefs');
 658
 659         if ($values) {
 660                 $values = config_to_multi ($values);
 661                 @branch_refs = ();
 662                 foreach my $value (@{$values}) {
 663                         push @branch_refs, split /\s+/, $value;
 664                 }
 665         }
 666
 667         return @branch_refs;
 668 }
 669
 670 # checking HEAD file with -e is fragile if the repository was
 671 # initialized long time ago (i.e. symlink HEAD) and was pack-ref'ed
 672 # and then pruned.
 673 sub check_head_link {
 674         my ($dir) = @_;
 675         my $headfile = "$dir/HEAD";
 676         return ((-e $headfile) ||
 677                 (-l $headfile && readlink($headfile) =~ /^refs\/heads\//));
 678 }
 679
 680 sub check_export_ok {
 681         my ($dir) = @_;
 682         return (check_head_link($dir) &&
 683                 (!$export_ok || -e "$dir/$export_ok") &&
 684                 (!$export_auth_hook || $export_auth_hook->($dir)));
 685 }
 686
 687 # process alternate names for backward compatibility
 688 # filter out unsupported (unknown) snapshot formats
 689 sub filter_snapshot_fmts {
 690         my @fmts = @_;
 691
 692         @fmts = map {
 693                 exists $known_snapshot_format_aliases{$_} ?
 694                        $known_snapshot_format_aliases{$_} : $_} @fmts;
 695         @fmts = grep {
 696                 exists $known_snapshot_formats{$_} &&
 697                 !$known_snapshot_formats{$_}{'disabled'}} @fmts;
 698 }
 699
 700 sub filter_and_validate_refs {
 701         my @refs = @_;
 702         my %unique_refs = ();
 703
 704         foreach my $ref (@refs) {
 705                 die_error(500, "Invalid ref '$ref' in 'extra-branch-refs' feature") unless (is_valid_ref_format($ref));
 706                 # 'heads' are added implicitly in get_branch_refs().
 707                 $unique_refs{$ref} = 1 if ($ref ne 'heads');
 708         }
 709         return sort keys %unique_refs;
 710 }
 711
 712 # If it is set to code reference, it is code that it is to be run once per
 713 # request, allowing updating configurations that change with each request,
 714 # while running other code in config file only once.
 715 #
 716 # Otherwise, if it is false then gitweb would process config file only once;
 717 # if it is true then gitweb config would be run for each request.
 718 our $per_request_config = 1;
 719
 720 # read and parse gitweb config file given by its parameter.
 721 # returns true on success, false on recoverable error, allowing
 722 # to chain this subroutine, using first file that exists.
 723 # dies on errors during parsing config file, as it is unrecoverable.
 724 sub read_config_file {
 725         my $filename = shift;
 726         return unless defined $filename;
 727         # die if there are errors parsing config file
 728         if (-e $filename) {
 729                 do $filename;
 730                 die $@ if $@;
 731                 return 1;
 732         }
 733         return;
 734 }
 735
 736 our ($GITWEB_CONFIG, $GITWEB_CONFIG_SYSTEM, $GITWEB_CONFIG_COMMON);
 737 sub evaluate_gitweb_config {
 738         our $GITWEB_CONFIG = $ENV{'GITWEB_CONFIG'} || "++GITWEB_CONFIG++";
 739         our $GITWEB_CONFIG_SYSTEM = $ENV{'GITWEB_CONFIG_SYSTEM'} || "++GITWEB_CONFIG_SYSTEM++";
 740         our $GITWEB_CONFIG_COMMON = $ENV{'GITWEB_CONFIG_COMMON'} || "++GITWEB_CONFIG_COMMON++";
 741
 742         # Protect against duplications of file names, to not read config twice.
 743         # Only one of $GITWEB_CONFIG and $GITWEB_CONFIG_SYSTEM is used, so
 744         # there possibility of duplication of filename there doesn't matter.
 745         $GITWEB_CONFIG = ""        if ($GITWEB_CONFIG eq $GITWEB_CONFIG_COMMON);
 746         $GITWEB_CONFIG_SYSTEM = "" if ($GITWEB_CONFIG_SYSTEM eq $GITWEB_CONFIG_COMMON);
 747
 748         # Common system-wide settings for convenience.
 749         # Those settings can be ovverriden by GITWEB_CONFIG or GITWEB_CONFIG_SYSTEM.
 750         read_config_file($GITWEB_CONFIG_COMMON);
 751
 752         # Use first config file that exists.  This means use the per-instance
 753         # GITWEB_CONFIG if exists, otherwise use GITWEB_SYSTEM_CONFIG.
 754         read_config_file($GITWEB_CONFIG) and return;
 755         read_config_file($GITWEB_CONFIG_SYSTEM);
 756 }
 757
 758 # Get loadavg of system, to compare against $maxload.
 759 # Currently it requires '/proc/loadavg' present to get loadavg;
 760 # if it is not present it returns 0, which means no load checking.
 761 sub get_loadavg {
 762         if( -e '/proc/loadavg' ){
 763                 open my $fd, '<', '/proc/loadavg'
 764                         or return 0;
 765                 my @load = split(/\s+/, scalar <$fd>);
 766                 close $fd;
 767
 768                 # The first three columns measure CPU and IO utilization of the last one,
 769                 # five, and 10 minute periods.  The fourth column shows the number of
 770                 # currently running processes and the total number of processes in the m/n
 771                 # format.  The last column displays the last process ID used.
 772                 return $load[0] || 0;
 773         }
 774         # additional checks for load average should go here for things that don't export
 775         # /proc/loadavg
 776
 777         return 0;
 778 }
 779
 780 # version of the core git binary
 781 our $git_version;
 782 sub evaluate_git_version {
 783         our $git_version = qx("$GIT" --version) =~ m/git version (.*)$/ ? $1 : "unknown";
 784         $number_of_git_cmds++;
 785 }
 786
 787 sub check_loadavg {
 788         if (defined $maxload && get_loadavg() > $maxload) {
 789                 die_error(503, "The load average on the server is too high");
 790         }
 791 }
 792
 793 # ======================================================================
 794 # input validation and dispatch
 795
 796 # input parameters can be collected from a variety of sources (presently, CGI
 797 # and PATH_INFO), so we define an %input_params hash that collects them all
 798 # together during validation: this allows subsequent uses (e.g. href()) to be
 799 # agnostic of the parameter origin
 800
 801 our %input_params = ();
 802
 803 # input parameters are stored with the long parameter name as key. This will
 804 # also be used in the href subroutine to convert parameters to their CGI
 805 # equivalent, and since the href() usage is the most frequent one, we store
 806 # the name -> CGI key mapping here, instead of the reverse.
 807 #
 808 # XXX: Warning: If you touch this, check the search form for updating,
 809 # too.
 810
 811 our @cgi_param_mapping = (
 812         project => "p",
 813         action => "a",
 814         file_name => "f",
 815         file_parent => "fp",
 816         hash => "h",
 817         hash_parent => "hp",
 818         hash_base => "hb",
 819         hash_parent_base => "hpb",
 820         page => "pg",
 821         order => "o",
 822         searchtext => "s",
 823         searchtype => "st",
 824         snapshot_format => "sf",
 825         ctag_filter => 't',
 826         extra_options => "opt",
 827         search_use_regexp => "sr",
 828         ctag => "by_tag",
 829         diff_style => "ds",
 830         project_filter => "pf",
 831         # this must be last entry (for manipulation from JavaScript)
 832         javascript => "js"
 833 );
 834 our %cgi_param_mapping = @cgi_param_mapping;
 835
 836 # we will also need to know the possible actions, for validation
 837 our %actions = (
 838         "blame" => \&git_blame,
 839         "blame_incremental" => \&git_blame_incremental,
 840         "blame_data" => \&git_blame_data,
 841         "blobdiff" => \&git_blobdiff,
 842         "blobdiff_plain" => \&git_blobdiff_plain,
 843         "blob" => \&git_blob,
 844         "blob_plain" => \&git_blob_plain,
 845         "commitdiff" => \&git_commitdiff,
 846         "commitdiff_plain" => \&git_commitdiff_plain,
 847         "commit" => \&git_commit,
 848         "forks" => \&git_forks,
 849         "heads" => \&git_heads,
 850         "history" => \&git_history,
 851         "log" => \&git_log,
 852         "patch" => \&git_patch,
 853         "patches" => \&git_patches,
 854         "remotes" => \&git_remotes,
 855         "rss" => \&git_rss,
 856         "atom" => \&git_atom,
 857         "search" => \&git_search,
 858         "search_help" => \&git_search_help,
 859         "shortlog" => \&git_shortlog,
 860         "summary" => \&git_summary,
 861         "tag" => \&git_tag,
 862         "tags" => \&git_tags,
 863         "tree" => \&git_tree,
 864         "snapshot" => \&git_snapshot,
 865         "object" => \&git_object,
 866         # those below don't need $project
 867         "opml" => \&git_opml,
 868         "frontpage" => \&git_frontpage,
 869         "project_list" => \&git_project_list,
 870         "project_index" => \&git_project_index,
 871 );
 872
 873 # finally, we have the hash of allowed extra_options for the commands that
 874 # allow them
 875 our %allowed_options = (
 876         "--no-merges" => [ qw(rss atom log shortlog history) ],
 877 );
 878
 879 # fill %input_params with the CGI parameters. All values except for 'opt'
 880 # should be single values, but opt can be an array. We should probably
 881 # build an array of parameters that can be multi-valued, but since for the time
 882 # being it's only this one, we just single it out
 883 sub evaluate_query_params {
 884         our $cgi;
 885
 886         while (my ($name, $symbol) = each %cgi_param_mapping) {
 887                 if ($symbol eq 'opt') {
 888                         $input_params{$name} = [ map { decode_utf8($_) } $cgi->multi_param($symbol) ];
 889                 } else {
 890                         $input_params{$name} = decode_utf8($cgi->param($symbol));
 891                 }
 892         }
 893
 894         # Backwards compatibility - by_tag= <=> t=
 895         if ($input_params{'ctag'}) {
 896                 $input_params{'ctag_filter'} = $input_params{'ctag'};
 897         }
 898 }
 899
 900 # now read PATH_INFO and update the parameter list for missing parameters
 901 sub evaluate_path_info {
 902         return if defined $input_params{'project'};
 903         return if !$path_info;
 904         $path_info =~ s,^/+,,;
 905         return if !$path_info;
 906
 907         # find which part of PATH_INFO is project
 908         my $project = $path_info;
 909         $project =~ s,/+$,,;
 910         while ($project && !check_head_link("$projectroot/$project")) {
 911                 $project =~ s,/*[^/]*$,,;
 912         }
 913         return unless $project;
 914         $input_params{'project'} = $project;
 915
 916         # do not change any parameters if an action is given using the query string
 917         return if $input_params{'action'};
 918         $path_info =~ s,^\Q$project\E/*,,;
 919
 920         # next, check if we have an action
 921         my $action = $path_info;
 922         $action =~ s,/.*$,,;
 923         if (exists $actions{$action}) {
 924                 $path_info =~ s,^$action/*,,;
 925                 $input_params{'action'} = $action;
 926         }
 927
 928         # list of actions that want hash_base instead of hash, but can have no
 929         # pathname (f) parameter
 930         my @wants_base = (
 931                 'tree',
 932                 'history',
 933         );
 934
 935         # we want to catch, among others
 936         # [$hash_parent_base[:$file_parent]..]$hash_parent[:$file_name]
 937         my ($parentrefname, $parentpathname, $refname, $pathname) =
 938                 ($path_info =~ /^(?:(.+?)(?::(.+))?\.\.)?([^:]+?)?(?::(.+))?$/);
 939
 940         # first, analyze the 'current' part
 941         if (defined $pathname) {
 942                 # we got "branch:filename" or "branch:dir/"
 943                 # we could use git_get_type(branch:pathname), but:
 944                 # - it needs $git_dir
 945                 # - it does a git() call
 946                 # - the convention of terminating directories with a slash
 947                 #   makes it superfluous
 948                 # - embedding the action in the PATH_INFO would make it even
 949                 #   more superfluous
 950                 $pathname =~ s,^/+,,;
 951                 if (!$pathname || substr($pathname, -1) eq "/") {
 952                         $input_params{'action'} ||= "tree";
 953                         $pathname =~ s,/$,,;
 954                 } else {
 955                         # the default action depends on whether we had parent info
 956                         # or not
 957                         if ($parentrefname) {
 958                                 $input_params{'action'} ||= "blobdiff_plain";
 959                         } else {
 960                                 $input_params{'action'} ||= "blob_plain";
 961                         }
 962                 }
 963                 $input_params{'hash_base'} ||= $refname;
 964                 $input_params{'file_name'} ||= $pathname;
 965         } elsif (defined $refname) {
 966                 # we got "branch". In this case we have to choose if we have to
 967                 # set hash or hash_base.
 968                 #
 969                 # Most of the actions without a pathname only want hash to be
 970                 # set, except for the ones specified in @wants_base that want
 971                 # hash_base instead. It should also be noted that hand-crafted
 972                 # links having 'history' as an action and no pathname or hash
 973                 # set will fail, but that happens regardless of PATH_INFO.
 974                 if (defined $parentrefname) {
 975                         # if there is parent let the default be 'shortlog' action
 976                         # (for http://git.example.com/repo.git/A..B links); if there
 977                         # is no parent, dispatch will detect type of object and set
 978                         # action appropriately if required (if action is not set)
 979                         $input_params{'action'} ||= "shortlog";
 980                 }
 981                 if ($input_params{'action'} &&
 982                     grep { $_ eq $input_params{'action'} } @wants_base) {
 983                         $input_params{'hash_base'} ||= $refname;
 984                 } else {
 985                         $input_params{'hash'} ||= $refname;
 986                 }
 987         }
 988
 989         # next, handle the 'parent' part, if present
 990         if (defined $parentrefname) {
 991                 # a missing pathspec defaults to the 'current' filename, allowing e.g.
 992                 # someproject/blobdiff/oldrev..newrev:/filename
 993                 if ($parentpathname) {
 994                         $parentpathname =~ s,^/+,,;
 995                         $parentpathname =~ s,/$,,;
 996                         $input_params{'file_parent'} ||= $parentpathname;
 997                 } else {
 998                         $input_params{'file_parent'} ||= $input_params{'file_name'};
 999                 }
1000                 # we assume that hash_parent_base is wanted if a path was specified,
1001                 # or if the action wants hash_base instead of hash
1002                 if (defined $input_params{'file_parent'} ||
1003                         grep { $_ eq $input_params{'action'} } @wants_base) {
1004                         $input_params{'hash_parent_base'} ||= $parentrefname;
1005                 } else {
1006                         $input_params{'hash_parent'} ||= $parentrefname;
1007                 }
1008         }
1009
1010         # for the snapshot action, we allow URLs in the form
1011         # $project/snapshot/$hash.ext
1012         # where .ext determines the snapshot and gets removed from the
1013         # passed $refname to provide the $hash.
1014         #
1015         # To be able to tell that $refname includes the format extension, we
1016         # require the following two conditions to be satisfied:
1017         # - the hash input parameter MUST have been set from the $refname part
1018         #   of the URL (i.e. they must be equal)
1019         # - the snapshot format MUST NOT have been defined already (e.g. from
1020         #   CGI parameter sf)
1021         # It's also useless to try any matching unless $refname has a dot,
1022         # so we check for that too
1023         if (defined $input_params{'action'} &&
1024                 $input_params{'action'} eq 'snapshot' &&
1025                 defined $refname && index($refname, '.') != -1 &&
1026                 $refname eq $input_params{'hash'} &&
1027                 !defined $input_params{'snapshot_format'}) {
1028                 # We loop over the known snapshot formats, checking for
1029                 # extensions. Allowed extensions are both the defined suffix
1030                 # (which includes the initial dot already) and the snapshot
1031                 # format key itself, with a prepended dot
1032                 while (my ($fmt, $opt) = each %known_snapshot_formats) {
1033                         my $hash = $refname;
1034                         unless ($hash =~ s/(\Q$opt->{'suffix'}\E|\Q.$fmt\E)$//) {
1035                                 next;
1036                         }
1037                         my $sfx = $1;
1038                         # a valid suffix was found, so set the snapshot format
1039                         # and reset the hash parameter
1040                         $input_params{'snapshot_format'} = $fmt;
1041                         $input_params{'hash'} = $hash;
1042                         # we also set the format suffix to the one requested
1043                         # in the URL: this way a request for e.g. .tgz returns
1044                         # a .tgz instead of a .tar.gz
1045                         $known_snapshot_formats{$fmt}{'suffix'} = $sfx;
1046                         last;
1047                 }
1048         }
1049 }
1050
1051 our ($action, $project, $file_name, $file_parent, $hash, $hash_parent, $hash_base,
1052      $hash_parent_base, @extra_options, $page, $searchtype, $search_use_regexp,
1053      $searchtext, $search_regexp, $project_filter);
1054 sub evaluate_and_validate_params {
1055         our $action = $input_params{'action'};
1056         if (defined $action) {
1057                 if (!is_valid_action($action)) {
1058                         die_error(400, "Invalid action parameter");
1059                 }
1060         }
1061
1062         # parameters which are pathnames
1063         our $project = $input_params{'project'};
1064         if (defined $project) {
1065                 if (!is_valid_project($project)) {
1066                         undef $project;
1067                         die_error(404, "No such project");
1068                 }
1069         }
1070
1071         our $project_filter = $input_params{'project_filter'};
1072         if (defined $project_filter) {
1073                 if (!is_valid_pathname($project_filter)) {
1074                         die_error(404, "Invalid project_filter parameter");
1075                 }
1076         }
1077
1078         our $file_name = $input_params{'file_name'};
1079         if (defined $file_name) {
1080                 if (!is_valid_pathname($file_name)) {
1081                         die_error(400, "Invalid file parameter");
1082                 }
1083         }
1084
1085         our $file_parent = $input_params{'file_parent'};
1086         if (defined $file_parent) {
1087                 if (!is_valid_pathname($file_parent)) {
1088                         die_error(400, "Invalid file parent parameter");
1089                 }
1090         }
1091
1092         # parameters which are refnames
1093         our $hash = $input_params{'hash'};
1094         if (defined $hash) {
1095                 if (!is_valid_refname($hash)) {
1096                         die_error(400, "Invalid hash parameter");
1097                 }
1098         }
1099
1100         our $hash_parent = $input_params{'hash_parent'};
1101         if (defined $hash_parent) {
1102                 if (!is_valid_refname($hash_parent)) {
1103                         die_error(400, "Invalid hash parent parameter");
1104                 }
1105         }
1106
1107         our $hash_base = $input_params{'hash_base'};
1108         if (defined $hash_base) {
1109                 if (!is_valid_refname($hash_base)) {
1110                         die_error(400, "Invalid hash base parameter");
1111                 }
1112         }
1113
1114         our @extra_options = @{$input_params{'extra_options'}};
1115         # @extra_options is always defined, since it can only be (currently) set from
1116         # CGI, and $cgi->param() returns the empty array in array context if the param
1117         # is not set
1118         foreach my $opt (@extra_options) {
1119                 if (not exists $allowed_options{$opt}) {
1120                         die_error(400, "Invalid option parameter");
1121                 }
1122                 if (not grep(/^$action$/, @{$allowed_options{$opt}})) {
1123                         die_error(400, "Invalid option parameter for this action");
1124                 }
1125         }
1126
1127         our $hash_parent_base = $input_params{'hash_parent_base'};
1128         if (defined $hash_parent_base) {
1129                 if (!is_valid_refname($hash_parent_base)) {
1130                         die_error(400, "Invalid hash parent base parameter");
1131                 }
1132         }
1133
1134         # other parameters
1135         our $page = $input_params{'page'};
1136         if (defined $page) {
1137                 if ($page =~ m/[^0-9]/) {
1138                         die_error(400, "Invalid page parameter");
1139                 }
1140         }
1141
1142         our $searchtype = $input_params{'searchtype'};
1143         if (defined $searchtype) {
1144                 if ($searchtype =~ m/[^a-z]/) {
1145                         die_error(400, "Invalid searchtype parameter");
1146                 }
1147         }
1148
1149         our $search_use_regexp = $input_params{'search_use_regexp'};
1150
1151         our $searchtext = $input_params{'searchtext'};
1152         our $search_regexp = undef;
1153         if (defined $searchtext) {
1154                 if (length($searchtext) < 2) {
1155                         die_error(403, "At least two characters are required for search parameter");
1156                 }
1157                 if ($search_use_regexp) {
1158                         $search_regexp = $searchtext;
1159                         if (!eval { qr/$search_regexp/; 1; }) {
1160                                 (my $error = $@) =~ s/ at \S+ line \d+.*\n?//;
1161                                 die_error(400, "Invalid search regexp '$search_regexp'",
1162                                           esc_html($error));
1163                         }
1164                 } else {
1165                         $search_regexp = quotemeta $searchtext;
1166                 }
1167         }
1168 }
1169
1170 # path to the current git repository
1171 our $git_dir;
1172 sub evaluate_git_dir {
1173         our $git_dir = "$projectroot/$project" if $project;
1174 }
1175
1176 our (@snapshot_fmts, $git_avatar, @extra_branch_refs);
1177 sub configure_gitweb_features {
1178         # list of supported snapshot formats
1179         our @snapshot_fmts = gitweb_get_feature('snapshot');
1180         @snapshot_fmts = filter_snapshot_fmts(@snapshot_fmts);
1181
1182         # check that the avatar feature is set to a known provider name,
1183         # and for each provider check if the dependencies are satisfied.
1184         # if the provider name is invalid or the dependencies are not met,
1185         # reset $git_avatar to the empty string.
1186         our ($git_avatar) = gitweb_get_feature('avatar');
1187         if ($git_avatar eq 'gravatar') {
1188                 $git_avatar = '' unless (eval { require Digest::MD5; 1; });
1189         } elsif ($git_avatar eq 'picon') {
1190                 # no dependencies
1191         } else {
1192                 $git_avatar = '';
1193         }
1194
1195         our @extra_branch_refs = gitweb_get_feature('extra-branch-refs');
1196         @extra_branch_refs = filter_and_validate_refs (@extra_branch_refs);
1197 }
1198
1199 sub get_branch_refs {
1200         return ('heads', @extra_branch_refs);
1201 }
1202
1203 # custom error handler: 'die <message>' is Internal Server Error
1204 sub handle_errors_html {
1205         my $msg = shift; # it is already HTML escaped
1206
1207         # to avoid infinite loop where error occurs in die_error,
1208         # change handler to default handler, disabling handle_errors_html
1209         set_message("Error occurred when inside die_error:\n$msg");
1210
1211         # you cannot jump out of die_error when called as error handler;
1212         # the subroutine set via CGI::Carp::set_message is called _after_
1213         # HTTP headers are already written, so it cannot write them itself
1214         die_error(undef, undef, $msg, -error_handler => 1, -no_http_header => 1);
1215 }
1216 set_message(\&handle_errors_html);
1217
1218 # dispatch
1219 sub dispatch {
1220         if (!defined $action) {
1221                 if (defined $hash) {
1222                         $action = git_get_type($hash);
1223                         $action or die_error(404, "Object does not exist");
1224                 } elsif (defined $hash_base && defined $file_name) {
1225                         $action = git_get_type("$hash_base:$file_name");
1226                         $action or die_error(404, "File or directory does not exist");
1227                 } elsif (defined $project) {
1228                         $action = 'summary';
1229                 } else {
1230                         $action = 'project_list';
1231                 }
1232         }
1233         if (!defined($actions{$action})) {
1234                 die_error(400, "Unknown action");
1235         }
1236         if ($action !~ m/^(?:opml|frontpage|project_list|project_index)$/ &&
1237             !$project) {
1238                 die_error(400, "Project needed");
1239         }
1240         $actions{$action}->();
1241 }
1242
1243 sub reset_timer {
1244         our $t0 = [ gettimeofday() ]
1245                 if defined $t0;
1246         our $number_of_git_cmds = 0;
1247 }
1248
1249 our $first_request = 1;
1250 sub run_request {
1251         reset_timer();
1252
1253         evaluate_uri();
1254         if ($first_request) {
1255                 evaluate_gitweb_config();
1256                 evaluate_git_version();
1257         }
1258         if ($per_request_config) {
1259                 if (ref($per_request_config) eq 'CODE') {
1260                         $per_request_config->();
1261                 } elsif (!$first_request) {
1262                         evaluate_gitweb_config();
1263                 }
1264         }
1265         check_loadavg();
1266
1267         # $projectroot and $projects_list might be set in gitweb config file
1268         $projects_list ||= $projectroot;
1269
1270         evaluate_query_params();
1271         evaluate_path_info();
1272         evaluate_and_validate_params();
1273         evaluate_git_dir();
1274
1275         configure_gitweb_features();
1276
1277         dispatch();
1278 }
1279
1280 our $is_last_request = sub { 1 };
1281 our ($pre_dispatch_hook, $post_dispatch_hook, $pre_listen_hook);
1282 our $CGI = 'CGI';
1283 our $cgi;
1284 sub configure_as_fcgi {
1285         require CGI::Fast;
1286         our $CGI = 'CGI::Fast';
1287
1288         my $request_number = 0;
1289         # let each child service 100 requests
1290         our $is_last_request = sub { ++$request_number > 100 };
1291 }
1292 sub evaluate_argv {
1293         my $script_name = $ENV{'SCRIPT_NAME'} || $ENV{'SCRIPT_FILENAME'} || __FILE__;
1294         configure_as_fcgi()
1295                 if $script_name =~ /\.fcgi$/;
1296
1297         return unless (@ARGV);
1298
1299         require Getopt::Long;
1300         Getopt::Long::GetOptions(
1301                 'fastcgi|fcgi|f' => \&configure_as_fcgi,
1302                 'nproc|n=i' => sub {
1303                         my ($arg, $val) = @_;
1304                         return unless eval { require FCGI::ProcManager; 1; };
1305                         my $proc_manager = FCGI::ProcManager->new({
1306                                 n_processes => $val,
1307                         });
1308                         our $pre_listen_hook    = sub { $proc_manager->pm_manage()        };
1309                         our $pre_dispatch_hook  = sub { $proc_manager->pm_pre_dispatch()  };
1310                         our $post_dispatch_hook = sub { $proc_manager->pm_post_dispatch() };
1311                 },
1312         );
1313 }
1314
1315 sub run {
1316         evaluate_argv();
1317
1318         $first_request = 1;
1319         $pre_listen_hook->()
1320                 if $pre_listen_hook;
1321
1322  REQUEST:
1323         while ($cgi = $CGI->new()) {
1324                 $pre_dispatch_hook->()
1325                         if $pre_dispatch_hook;
1326
1327                 run_request();
1328
1329                 $post_dispatch_hook->()
1330                         if $post_dispatch_hook;
1331                 $first_request = 0;
1332
1333                 last REQUEST if ($is_last_request->());
1334         }
1335
1336  DONE_GITWEB:
1337         1;
1338 }
1339
1340 run();
1341
1342 if (defined caller) {
1343         # wrapped in a subroutine processing requests,
1344         # e.g. mod_perl with ModPerl::Registry, or PSGI with Plack::App::WrapCGI
1345         return;
1346 } else {
1347         # pure CGI script, serving single request
1348         exit;
1349 }
1350
1351 ## ======================================================================
1352 ## action links
1353
1354 # possible values of extra options
1355 # -full => 0|1      - use absolute/full URL ($my_uri/$my_url as base)
1356 # -replay => 1      - start from a current view (replay with modifications)
1357 # -path_info => 0|1 - don't use/use path_info URL (if possible)
1358 # -anchor => ANCHOR - add #ANCHOR to end of URL, implies -replay if used alone
1359 sub href {
1360         my %params = @_;
1361         # default is to use -absolute url() i.e. $my_uri
1362         my $href = $params{-full} ? $my_url : $my_uri;
1363
1364         # implicit -replay, must be first of implicit params
1365         $params{-replay} = 1 if (keys %params == 1 && $params{-anchor});
1366
1367         $params{'project'} = $project unless exists $params{'project'};
1368
1369         if ($params{-replay}) {
1370                 while (my ($name, $symbol) = each %cgi_param_mapping) {
1371                         if (!exists $params{$name}) {
1372                                 $params{$name} = $input_params{$name};
1373                         }
1374                 }
1375         }
1376
1377         my $use_pathinfo = gitweb_check_feature('pathinfo');
1378         if (defined $params{'project'} &&
1379             (exists $params{-path_info} ? $params{-path_info} : $use_pathinfo)) {
1380                 # try to put as many parameters as possible in PATH_INFO:
1381                 #   - project name
1382                 #   - action
1383                 #   - hash_parent or hash_parent_base:/file_parent
1384                 #   - hash or hash_base:/filename
1385                 #   - the snapshot_format as an appropriate suffix
1386
1387                 # When the script is the root DirectoryIndex for the domain,
1388                 # $href here would be something like http://gitweb.example.com/
1389                 # Thus, we strip any trailing / from $href, to spare us double
1390                 # slashes in the final URL
1391                 $href =~ s,/$,,;
1392
1393                 # Then add the project name, if present
1394                 $href .= "/".esc_path_info($params{'project'});
1395                 delete $params{'project'};
1396
1397                 # since we destructively absorb parameters, we keep this
1398                 # boolean that remembers if we're handling a snapshot
1399                 my $is_snapshot = $params{'action'} eq 'snapshot';
1400
1401                 # Summary just uses the project path URL, any other action is
1402                 # added to the URL
1403                 if (defined $params{'action'}) {
1404                         $href .= "/".esc_path_info($params{'action'})
1405                                 unless $params{'action'} eq 'summary';
1406                         delete $params{'action'};
1407                 }
1408
1409                 # Next, we put hash_parent_base:/file_parent..hash_base:/file_name,
1410                 # stripping nonexistent or useless pieces
1411                 $href .= "/" if ($params{'hash_base'} || $params{'hash_parent_base'}
1412                         || $params{'hash_parent'} || $params{'hash'});
1413                 if (defined $params{'hash_base'}) {
1414                         if (defined $params{'hash_parent_base'}) {
1415                                 $href .= esc_path_info($params{'hash_parent_base'});
1416                                 # skip the file_parent if it's the same as the file_name
1417                                 if (defined $params{'file_parent'}) {
1418                                         if (defined $params{'file_name'} && $params{'file_parent'} eq $params{'file_name'}) {
1419                                                 delete $params{'file_parent'};
1420                                         } elsif ($params{'file_parent'} !~ /\.\./) {
1421                                                 $href .= ":/".esc_path_info($params{'file_parent'});
1422                                                 delete $params{'file_parent'};
1423                                         }
1424                                 }
1425                                 $href .= "..";
1426                                 delete $params{'hash_parent'};
1427                                 delete $params{'hash_parent_base'};
1428                         } elsif (defined $params{'hash_parent'}) {
1429                                 $href .= esc_path_info($params{'hash_parent'}). "..";
1430                                 delete $params{'hash_parent'};
1431                         }
1432
1433                         $href .= esc_path_info($params{'hash_base'});
1434                         if (defined $params{'file_name'} && $params{'file_name'} !~ /\.\./) {
1435                                 $href .= ":/".esc_path_info($params{'file_name'});
1436                                 delete $params{'file_name'};
1437                         }
1438                         delete $params{'hash'};
1439                         delete $params{'hash_base'};
1440                 } elsif (defined $params{'hash'}) {
1441                         $href .= esc_path_info($params{'hash'});
1442                         delete $params{'hash'};
1443                 }
1444
1445                 # If the action was a snapshot, we can absorb the
1446                 # snapshot_format parameter too
1447                 if ($is_snapshot) {
1448                         my $fmt = $params{'snapshot_format'};
1449                         # snapshot_format should always be defined when href()
1450                         # is called, but just in case some code forgets, we
1451                         # fall back to the default
1452                         $fmt ||= $snapshot_fmts[0];
1453                         $href .= $known_snapshot_formats{$fmt}{'suffix'};
1454                         delete $params{'snapshot_format'};
1455                 }
1456         }
1457
1458         # now encode the parameters explicitly
1459         my @result = ();
1460         for (my $i = 0; $i < @cgi_param_mapping; $i += 2) {
1461                 my ($name, $symbol) = ($cgi_param_mapping[$i], $cgi_param_mapping[$i+1]);
1462                 if (defined $params{$name}) {
1463                         if (ref($params{$name}) eq "ARRAY") {
1464                                 foreach my $par (@{$params{$name}}) {
1465                                         push @result, $symbol . "=" . esc_param($par);
1466                                 }
1467                         } else {
1468                                 push @result, $symbol . "=" . esc_param($params{$name});
1469                         }
1470                 }
1471         }
1472         $href .= "?" . join(';', @result) if scalar @result;
1473
1474         # final transformation: trailing spaces must be escaped (URI-encoded)
1475         $href =~ s/(\s+)$/CGI::escape($1)/e;
1476
1477         if ($params{-anchor}) {
1478                 $href .= "#".esc_param($params{-anchor});
1479         }
1480
1481         return $href;
1482 }
1483
1484
1485 ## ======================================================================
1486 ## validation, quoting/unquoting and escaping
1487
1488 sub is_valid_action {
1489         my $input = shift;
1490         return undef unless exists $actions{$input};
1491         return 1;
1492 }
1493
1494 sub is_valid_project {
1495         my $input = shift;
1496
1497         return unless defined $input;
1498         if (!is_valid_pathname($input) ||
1499                 !(-d "$projectroot/$input") ||
1500                 !check_export_ok("$projectroot/$input") ||
1501                 ($strict_export && !project_in_list($input))) {
1502                 return undef;
1503         } else {
1504                 return 1;
1505         }
1506 }
1507
1508 sub is_valid_pathname {
1509         my $input = shift;
1510
1511         return undef unless defined $input;
1512         # no '.' or '..' as elements of path, i.e. no '.' or '..'
1513         # at the beginning, at the end, and between slashes.
1514         # also this catches doubled slashes
1515         if ($input =~ m!(^|/)(|\.|\.\.)(/|$)!) {
1516                 return undef;
1517         }
1518         # no null characters
1519         if ($input =~ m!\0!) {
1520                 return undef;
1521         }
1522         return 1;
1523 }
1524
1525 sub is_valid_ref_format {
1526         my $input = shift;
1527
1528         return undef unless defined $input;
1529         # restrictions on ref name according to git-check-ref-format
1530         if ($input =~ m!(/\.|\.\.|[\000-\040\177 ~^:?*\[]|/$)!) {
1531                 return undef;
1532         }
1533         return 1;
1534 }
1535
1536 sub is_valid_refname {
1537         my $input = shift;
1538
1539         return undef unless defined $input;
1540         # textual hashes are O.K.
1541         if ($input =~ m/^[0-9a-fA-F]{40}$/) {
1542                 return 1;
1543         }
1544         # it must be correct pathname
1545         is_valid_pathname($input) or return undef;
1546         # check git-check-ref-format restrictions
1547         is_valid_ref_format($input) or return undef;
1548         return 1;
1549 }
1550
1551 # decode sequences of octets in utf8 into Perl's internal form,
1552 # which is utf-8 with utf8 flag set if needed.  gitweb writes out
1553 # in utf-8 thanks to "binmode STDOUT, ':utf8'" at beginning
1554 sub to_utf8 {
1555         my $str = shift;
1556         return undef unless defined $str;
1557
1558         if (utf8::is_utf8($str) || utf8::decode($str)) {
1559                 return $str;
1560         } else {
1561                 return decode($fallback_encoding, $str, Encode::FB_DEFAULT);
1562         }
1563 }
1564
1565 # quote unsafe chars, but keep the slash, even when it's not
1566 # correct, but quoted slashes look too horrible in bookmarks
1567 sub esc_param {
1568         my $str = shift;
1569         return undef unless defined $str;
1570         $str =~ s/([^A-Za-z0-9\-_.~()\/:@ ]+)/CGI::escape($1)/eg;
1571         $str =~ s/ /\+/g;
1572         return $str;
1573 }
1574
1575 # the quoting rules for path_info fragment are slightly different
1576 sub esc_path_info {
1577         my $str = shift;
1578         return undef unless defined $str;
1579
1580         # path_info doesn't treat '+' as space (specially), but '?' must be escaped
1581         $str =~ s/([^A-Za-z0-9\-_.~();\/;:@&= +]+)/CGI::escape($1)/eg;
1582
1583         return $str;
1584 }
1585
1586 # quote unsafe chars in whole URL, so some characters cannot be quoted
1587 sub esc_url {
1588         my $str = shift;
1589         return undef unless defined $str;
1590         $str =~ s/([^A-Za-z0-9\-_.~();\/;?:@&= ]+)/CGI::escape($1)/eg;
1591         $str =~ s/ /\+/g;
1592         return $str;
1593 }
1594
1595 # quote unsafe characters in HTML attributes
1596 sub esc_attr {
1597
1598         # for XHTML conformance escaping '"' to '&quot;' is not enough
1599         return esc_html(@_);
1600 }
1601
1602 # replace invalid utf8 character with SUBSTITUTION sequence
1603 sub esc_html {
1604         my $str = shift;
1605         my %opts = @_;
1606
1607         return undef unless defined $str;
1608
1609         $str = to_utf8($str);
1610         $str = $cgi->escapeHTML($str);
1611         if ($opts{'-nbsp'}) {
1612                 $str =~ s/ /&nbsp;/g;
1613         }
1614         $str =~ s|([[:cntrl:]])|(($1 ne "\t") ? quot_cec($1) : $1)|eg;
1615         return $str;
1616 }
1617
1618 # quote control characters and escape filename to HTML
1619 sub esc_path {
1620         my $str = shift;
1621         my %opts = @_;
1622
1623         return undef unless defined $str;
1624
1625         $str = to_utf8($str);
1626         $str = $cgi->escapeHTML($str);
1627         if ($opts{'-nbsp'}) {
1628                 $str =~ s/ /&nbsp;/g;
1629         }
1630         $str =~ s|([[:cntrl:]])|quot_cec($1)|eg;
1631         return $str;
1632 }
1633
1634 # Sanitize for use in XHTML + application/xml+xhtm (valid XML 1.0)
1635 sub sanitize {
1636         my $str = shift;
1637
1638         return undef unless defined $str;
1639
1640         $str = to_utf8($str);
1641         $str =~ s|([[:cntrl:]])|(index("\t\n\r", $1) != -1 ? $1 : quot_cec($1))|eg;
1642         return $str;
1643 }
1644
1645 # Make control characters "printable", using character escape codes (CEC)
1646 sub quot_cec {
1647         my $cntrl = shift;
1648         my %opts = @_;
1649         my %es = ( # character escape codes, aka escape sequences
1650                 "\t" => '\t',   # tab            (HT)
1651                 "\n" => '\n',   # line feed      (LF)
1652                 "\r" => '\r',   # carrige return (CR)
1653                 "\f" => '\f',   # form feed      (FF)
1654                 "\b" => '\b',   # backspace      (BS)
1655                 "\a" => '\a',   # alarm (bell)   (BEL)
1656                 "\e" => '\e',   # escape         (ESC)
1657                 "\013" => '\v', # vertical tab   (VT)
1658                 "\000" => '\0', # nul character  (NUL)
1659         );
1660         my $chr = ( (exists $es{$cntrl})
1661                     ? $es{$cntrl}
1662                     : sprintf('\%2x', ord($cntrl)) );
1663         if ($opts{-nohtml}) {
1664                 return $chr;
1665         } else {
1666                 return "<span class=\"cntrl\">$chr</span>";
1667         }
1668 }
1669
1670 # Alternatively use unicode control pictures codepoints,
1671 # Unicode "printable representation" (PR)
1672 sub quot_upr {
1673         my $cntrl = shift;
1674         my %opts = @_;
1675
1676         my $chr = sprintf('&#%04d;', 0x2400+ord($cntrl));
1677         if ($opts{-nohtml}) {
1678                 return $chr;
1679         } else {
1680                 return "<span class=\"cntrl\">$chr</span>";
1681         }
1682 }
1683
1684 # git may return quoted and escaped filenames
1685 sub unquote {
1686         my $str = shift;
1687
1688         sub unq {
1689                 my $seq = shift;
1690                 my %es = ( # character escape codes, aka escape sequences
1691                         't' => "\t",   # tab            (HT, TAB)
1692                         'n' => "\n",   # newline        (NL)
1693                         'r' => "\r",   # return         (CR)
1694                         'f' => "\f",   # form feed      (FF)
1695                         'b' => "\b",   # backspace      (BS)
1696                         'a' => "\a",   # alarm (bell)   (BEL)
1697                         'e' => "\e",   # escape         (ESC)
1698                         'v' => "\013", # vertical tab   (VT)
1699                 );
1700
1701                 if ($seq =~ m/^[0-7]{1,3}$/) {
1702                         # octal char sequence
1703                         return chr(oct($seq));
1704                 } elsif (exists $es{$seq}) {
1705                         # C escape sequence, aka character escape code
1706                         return $es{$seq};
1707                 }
1708                 # quoted ordinary character
1709                 return $seq;
1710         }
1711
1712         if ($str =~ m/^"(.*)"$/) {
1713                 # needs unquoting
1714                 $str = $1;
1715                 $str =~ s/\\([^0-7]|[0-7]{1,3})/unq($1)/eg;
1716         }
1717         return $str;
1718 }
1719
1720 # escape tabs (convert tabs to spaces)
1721 sub untabify {
1722         my $line = shift;
1723
1724         while ((my $pos = index($line, "\t")) != -1) {
1725                 if (my $count = (8 - ($pos % 8))) {
1726                         my $spaces = ' ' x $count;
1727                         $line =~ s/\t/$spaces/;
1728                 }
1729         }
1730
1731         return $line;
1732 }
1733
1734 sub project_in_list {
1735         my $project = shift;
1736         my @list = git_get_projects_list();
1737         return @list && scalar(grep { $_->{'path'} eq $project } @list);
1738 }
1739
1740 ## ----------------------------------------------------------------------
1741 ## HTML aware string manipulation
1742
1743 # Try to chop given string on a word boundary between position
1744 # $len and $len+$add_len. If there is no word boundary there,
1745 # chop at $len+$add_len. Do not chop if chopped part plus ellipsis
1746 # (marking chopped part) would be longer than given string.
1747 sub chop_str {
1748         my $str = shift;
1749         my $len = shift;
1750         my $add_len = shift || 10;
1751         my $where = shift || 'right'; # 'left' | 'center' | 'right'
1752
1753         # Make sure perl knows it is utf8 encoded so we don't
1754         # cut in the middle of a utf8 multibyte char.
1755         $str = to_utf8($str);
1756
1757         # allow only $len chars, but don't cut a word if it would fit in $add_len
1758         # if it doesn't fit, cut it if it's still longer than the dots we would add
1759         # remove chopped character entities entirely
1760
1761         # when chopping in the middle, distribute $len into left and right part
1762         # return early if chopping wouldn't make string shorter
1763         if ($where eq 'center') {
1764                 return $str if ($len + 5 >= length($str)); # filler is length 5
1765                 $len = int($len/2);
1766         } else {
1767                 return $str if ($len + 4 >= length($str)); # filler is length 4
1768         }
1769
1770         # regexps: ending and beginning with word part up to $add_len
1771         my $endre = qr/.{$len}\w{0,$add_len}/;
1772         my $begre = qr/\w{0,$add_len}.{$len}/;
1773
1774         if ($where eq 'left') {
1775                 $str =~ m/^(.*?)($begre)$/;
1776                 my ($lead, $body) = ($1, $2);
1777                 if (length($lead) > 4) {
1778                         $lead = " ...";
1779                 }
1780                 return "$lead$body";
1781
1782         } elsif ($where eq 'center') {
1783                 $str =~ m/^($endre)(.*)$/;
1784                 my ($left, $str)  = ($1, $2);
1785                 $str =~ m/^(.*?)($begre)$/;
1786                 my ($mid, $right) = ($1, $2);
1787                 if (length($mid) > 5) {
1788                         $mid = " ... ";
1789                 }
1790                 return "$left$mid$right";
1791
1792         } else {
1793                 $str =~ m/^($endre)(.*)$/;
1794                 my $body = $1;
1795                 my $tail = $2;
1796                 if (length($tail) > 4) {
1797                         $tail = "... ";
1798                 }
1799                 return "$body$tail";
1800         }
1801 }
1802
1803 # takes the same arguments as chop_str, but also wraps a <span> around the
1804 # result with a title attribute if it does get chopped. Additionally, the
1805 # string is HTML-escaped.
1806 sub chop_and_escape_str {
1807         my ($str) = @_;
1808
1809         my $chopped = chop_str(@_);
1810         $str = to_utf8($str);
1811         if ($chopped eq $str) {
1812                 return esc_html($chopped);
1813         } else {
1814                 $str =~ s/[[:cntrl:]]/?/g;
1815                 return $cgi->span({-title=>$str}, esc_html($chopped));
1816         }
1817 }
1818
1819 # Highlight selected fragments of string, using given CSS class,
1820 # and escape HTML.  It is assumed that fragments do not overlap.
1821 # Regions are passed as list of pairs (array references).
1822 #
1823 # Example: esc_html_hl_regions("foobar", "mark", [ 0, 3 ]) returns
1824 # '<span class="mark">foo</span>bar'
1825 sub esc_html_hl_regions {
1826         my ($str, $css_class, @sel) = @_;
1827         my %opts = grep { ref($_) ne 'ARRAY' } @sel;
1828         @sel     = grep { ref($_) eq 'ARRAY' } @sel;
1829         return esc_html($str, %opts) unless @sel;
1830
1831         my $out = '';
1832         my $pos = 0;
1833
1834         for my $s (@sel) {
1835                 my ($begin, $end) = @$s;
1836
1837                 # Don't create empty <span> elements.
1838                 next if $end <= $begin;
1839
1840                 my $escaped = esc_html(substr($str, $begin, $end - $begin),
1841                                        %opts);
1842
1843                 $out .= esc_html(substr($str, $pos, $begin - $pos), %opts)
1844                         if ($begin - $pos > 0);
1845                 $out .= $cgi->span({-class => $css_class}, $escaped);
1846
1847                 $pos = $end;
1848         }
1849         $out .= esc_html(substr($str, $pos), %opts)
1850                 if ($pos < length($str));
1851
1852         return $out;
1853 }
1854
1855 # return positions of beginning and end of each match
1856 sub matchpos_list {
1857         my ($str, $regexp) = @_;
1858         return unless (defined $str && defined $regexp);
1859
1860         my @matches;
1861         while ($str =~ /$regexp/g) {
1862                 push @matches, [$-[0], $+[0]];
1863         }
1864         return @matches;
1865 }
1866
1867 # highlight match (if any), and escape HTML
1868 sub esc_html_match_hl {
1869         my ($str, $regexp) = @_;
1870         return esc_html($str) unless defined $regexp;
1871
1872         my @matches = matchpos_list($str, $regexp);
1873         return esc_html($str) unless @matches;
1874
1875         return esc_html_hl_regions($str, 'match', @matches);
1876 }
1877
1878
1879 # highlight match (if any) of shortened string, and escape HTML
1880 sub esc_html_match_hl_chopped {
1881         my ($str, $chopped, $regexp) = @_;
1882         return esc_html_match_hl($str, $regexp) unless defined $chopped;
1883
1884         my @matches = matchpos_list($str, $regexp);
1885         return esc_html($chopped) unless @matches;
1886
1887         # filter matches so that we mark chopped string
1888         my $tail = "... "; # see chop_str
1889         unless ($chopped =~ s/\Q$tail\E$//) {
1890                 $tail = '';
1891         }
1892         my $chop_len = length($chopped);
1893         my $tail_len = length($tail);
1894         my @filtered;
1895
1896         for my $m (@matches) {
1897                 if ($m->[0] > $chop_len) {
1898                         push @filtered, [ $chop_len, $chop_len + $tail_len ] if ($tail_len > 0);
1899                         last;
1900                 } elsif ($m->[1] > $chop_len) {
1901                         push @filtered, [ $m->[0], $chop_len + $tail_len ];
1902                         last;
1903                 }
1904                 push @filtered, $m;
1905         }
1906
1907         return esc_html_hl_regions($chopped . $tail, 'match', @filtered);
1908 }
1909
1910 ## ----------------------------------------------------------------------
1911 ## functions returning short strings
1912
1913 # CSS class for given age value (in seconds)
1914 sub age_class {
1915         my $age = shift;
1916
1917         if (!defined $age) {
1918                 return "noage";
1919         } elsif ($age < 60*60*2) {
1920                 return "age0";
1921         } elsif ($age < 60*60*24*2) {
1922                 return "age1";
1923         } else {
1924                 return "age2";
1925         }
1926 }
1927
1928 # convert age in seconds to "nn units ago" string
1929 sub age_string {
1930         my $age = shift;
1931         my $age_str;
1932
1933         if ($age > 60*60*24*365*2) {
1934                 $age_str = (int $age/60/60/24/365);
1935                 $age_str .= " years ago";
1936         } elsif ($age > 60*60*24*(365/12)*2) {
1937                 $age_str = int $age/60/60/24/(365/12);
1938                 $age_str .= " months ago";
1939         } elsif ($age > 60*60*24*7*2) {
1940                 $age_str = int $age/60/60/24/7;
1941                 $age_str .= " weeks ago";
1942         } elsif ($age > 60*60*24*2) {
1943                 $age_str = int $age/60/60/24;
1944                 $age_str .= " days ago";
1945         } elsif ($age > 60*60*2) {
1946                 $age_str = int $age/60/60;
1947                 $age_str .= " hours ago";
1948         } elsif ($age > 60*2) {
1949                 $age_str = int $age/60;
1950                 $age_str .= " min ago";
1951         } elsif ($age > 2) {
1952                 $age_str = int $age;
1953                 $age_str .= " sec ago";
1954         } else {
1955                 $age_str .= " right now";
1956         }
1957         return $age_str;
1958 }
1959
1960 use constant {
1961         S_IFINVALID => 0030000,
1962         S_IFGITLINK => 0160000,
1963 };
1964
1965 # submodule/subproject, a commit object reference
1966 sub S_ISGITLINK {
1967         my $mode = shift;
1968
1969         return (($mode & S_IFMT) == S_IFGITLINK)
1970 }
1971
1972 # convert file mode in octal to symbolic file mode string
1973 sub mode_str {
1974         my $mode = oct shift;
1975
1976         if (S_ISGITLINK($mode)) {
1977                 return 'm---------';
1978         } elsif (S_ISDIR($mode & S_IFMT)) {
1979                 return 'drwxr-xr-x';
1980         } elsif (S_ISLNK($mode)) {
1981                 return 'lrwxrwxrwx';
1982         } elsif (S_ISREG($mode)) {
1983                 # git cares only about the executable bit
1984                 if ($mode & S_IXUSR) {
1985                         return '-rwxr-xr-x';
1986                 } else {
1987                         return '-rw-r--r--';
1988                 };
1989         } else {
1990                 return '----------';
1991         }
1992 }
1993
1994 # convert file mode in octal to file type string
1995 sub file_type {
1996         my $mode = shift;
1997
1998         if ($mode !~ m/^[0-7]+$/) {
1999                 return $mode;
2000         } else {
2001                 $mode = oct $mode;
2002         }
2003
2004         if (S_ISGITLINK($mode)) {
2005                 return "submodule";
2006         } elsif (S_ISDIR($mode & S_IFMT)) {
2007                 return "directory";
2008         } elsif (S_ISLNK($mode)) {
2009                 return "symlink";
2010         } elsif (S_ISREG($mode)) {
2011                 return "file";
2012         } else {
2013                 return "unknown";
2014         }
2015 }
2016
2017 # convert file mode in octal to file type description string
2018 sub file_type_long {
2019         my $mode = shift;
2020
2021         if ($mode !~ m/^[0-7]+$/) {
2022                 return $mode;
2023         } else {
2024                 $mode = oct $mode;
2025         }
2026
2027         if (S_ISGITLINK($mode)) {
2028                 return "submodule";
2029         } elsif (S_ISDIR($mode & S_IFMT)) {
2030                 return "directory";
2031         } elsif (S_ISLNK($mode)) {
2032                 return "symlink";
2033         } elsif (S_ISREG($mode)) {
2034                 if ($mode & S_IXUSR) {
2035                         return "executable";
2036                 } else {
2037                         return "file";
2038                 };
2039         } else {
2040                 return "unknown";
2041         }
2042 }
2043
2044
2045 ## ----------------------------------------------------------------------
2046 ## functions returning short HTML fragments, or transforming HTML fragments
2047 ## which don't belong to other sections
2048
2049 # format line of commit message.
2050 sub format_log_line_html {
2051         my $line = shift;
2052
2053         $line = esc_html($line, -nbsp=>1);
2054         $line =~ s{\b([0-9a-fA-F]{8,40})\b}{
2055                 $cgi->a({-href => href(action=>"object", hash=>$1),
2056                                         -class => "text"}, $1);
2057         }eg;
2058
2059         return $line;
2060 }
2061
2062 # format marker of refs pointing to given object
2063
2064 # the destination action is chosen based on object type and current context:
2065 # - for annotated tags, we choose the tag view unless it's the current view
2066 #   already, in which case we go to shortlog view
2067 # - for other refs, we keep the current view if we're in history, shortlog or
2068 #   log view, and select shortlog otherwise
2069 sub format_ref_marker {
2070         my ($refs, $id) = @_;
2071         my $markers = '';
2072
2073         if (defined $refs->{$id}) {
2074                 foreach my $ref (@{$refs->{$id}}) {
2075                         # this code exploits the fact that non-lightweight tags are the
2076                         # only indirect objects, and that they are the only objects for which
2077                         # we want to use tag instead of shortlog as action
2078                         my ($type, $name) = qw();
2079                         my $indirect = ($ref =~ s/\^\{\}$//);
2080                         # e.g. tags/v2.6.11 or heads/next
2081                         if ($ref =~ m!^(.*?)s?/(.*)$!) {
2082                                 $type = $1;
2083                                 $name = $2;
2084                         } else {
2085                                 $type = "ref";
2086                                 $name = $ref;
2087                         }
2088
2089                         my $class = $type;
2090                         $class .= " indirect" if $indirect;
2091
2092                         my $dest_action = "shortlog";
2093
2094                         if ($indirect) {
2095                                 $dest_action = "tag" unless $action eq "tag";
2096                         } elsif ($action =~ /^(history|(short)?log)$/) {
2097                                 $dest_action = $action;
2098                         }
2099
2100                         my $dest = "";
2101                         $dest .= "refs/" unless $ref =~ m!^refs/!;
2102                         $dest .= $ref;
2103
2104                         my $link = $cgi->a({
2105                                 -href => href(
2106                                         action=>$dest_action,
2107                                         hash=>$dest
2108                                 )}, $name);
2109
2110                         $markers .= " <span class=\"".esc_attr($class)."\" title=\"".esc_attr($ref)."\">" .
2111                                 $link . "</span>";
2112                 }
2113         }
2114
2115         if ($markers) {
2116                 return ' <span class="refs">'. $markers . '</span>';
2117         } else {
2118                 return "";
2119         }
2120 }
2121
2122 # format, perhaps shortened and with markers, title line
2123 sub format_subject_html {
2124         my ($long, $short, $href, $extra) = @_;
2125         $extra = '' unless defined($extra);
2126
2127         if (length($short) < length($long)) {
2128                 $long =~ s/[[:cntrl:]]/?/g;
2129                 return $cgi->a({-href => $href, -class => "list subject",
2130                                 -title => to_utf8($long)},
2131                        esc_html($short)) . $extra;
2132         } else {
2133                 return $cgi->a({-href => $href, -class => "list subject"},
2134                        esc_html($long)) . $extra;
2135         }
2136 }
2137
2138 # Rather than recomputing the url for an email multiple times, we cache it
2139 # after the first hit. This gives a visible benefit in views where the avatar
2140 # for the same email is used repeatedly (e.g. shortlog).
2141 # The cache is shared by all avatar engines (currently gravatar only), which
2142 # are free to use it as preferred. Since only one avatar engine is used for any
2143 # given page, there's no risk for cache conflicts.
2144 our %avatar_cache = ();
2145
2146 # Compute the picon url for a given email, by using the picon search service over at
2147 # http://www.cs.indiana.edu/picons/search.html
2148 sub picon_url {
2149         my $email = lc shift;
2150         if (!$avatar_cache{$email}) {
2151                 my ($user, $domain) = split('@', $email);
2152                 $avatar_cache{$email} =
2153                         "//www.cs.indiana.edu/cgi-pub/kinzler/piconsearch.cgi/" .
2154                         "$domain/$user/" .
2155                         "users+domains+unknown/up/single";
2156         }
2157         return $avatar_cache{$email};
2158 }
2159
2160 # Compute the gravatar url for a given email, if it's not in the cache already.
2161 # Gravatar stores only the part of the URL before the size, since that's the
2162 # one computationally more expensive. This also allows reuse of the cache for
2163 # different sizes (for this particular engine).
2164 sub gravatar_url {
2165         my $email = lc shift;
2166         my $size = shift;
2167         $avatar_cache{$email} ||=
2168                 "//www.gravatar.com/avatar/" .
2169                         Digest::MD5::md5_hex($email) . "?s=";
2170         return $avatar_cache{$email} . $size;
2171 }
2172
2173 # Insert an avatar for the given $email at the given $size if the feature
2174 # is enabled.
2175 sub git_get_avatar {
2176         my ($email, %opts) = @_;
2177         my $pre_white  = ($opts{-pad_before} ? "&nbsp;" : "");
2178         my $post_white = ($opts{-pad_after}  ? "&nbsp;" : "");
2179         $opts{-size} ||= 'default';
2180         my $size = $avatar_size{$opts{-size}} || $avatar_size{'default'};
2181         my $url = "";
2182         if ($git_avatar eq 'gravatar') {
2183                 $url = gravatar_url($email, $size);
2184         } elsif ($git_avatar eq 'picon') {
2185                 $url = picon_url($email);
2186         }
2187         # Other providers can be added by extending the if chain, defining $url
2188         # as needed. If no variant puts something in $url, we assume avatars
2189         # are completely disabled/unavailable.
2190         if ($url) {
2191                 return $pre_white .
2192                        "<img width=\"$size\" " .
2193                             "class=\"avatar\" " .
2194                             "src=\"".esc_url($url)."\" " .
2195                             "alt=\"\" " .
2196                        "/>" . $post_white;
2197         } else {
2198                 return "";
2199         }
2200 }
2201
2202 sub format_search_author {
2203         my ($author, $searchtype, $displaytext) = @_;
2204         my $have_search = gitweb_check_feature('search');
2205
2206         if ($have_search) {
2207                 my $performed = "";
2208                 if ($searchtype eq 'author') {
2209                         $performed = "authored";
2210                 } elsif ($searchtype eq 'committer') {
2211                         $performed = "committed";
2212                 }
2213
2214                 return $cgi->a({-href => href(action=>"search", hash=>$hash,
2215                                 searchtext=>$author,
2216                                 searchtype=>$searchtype), class=>"list",
2217                                 title=>"Search for commits $performed by $author"},
2218                                 $displaytext);
2219
2220         } else {
2221                 return $displaytext;
2222         }
2223 }
2224
2225 # format the author name of the given commit with the given tag
2226 # the author name is chopped and escaped according to the other
2227 # optional parameters (see chop_str).
2228 sub format_author_html {
2229         my $tag = shift;
2230         my $co = shift;
2231         my $author = chop_and_escape_str($co->{'author_name'}, @_);
2232         return "<$tag class=\"author\">" .
2233                format_search_author($co->{'author_name'}, "author",
2234                        git_get_avatar($co->{'author_email'}, -pad_after => 1) .
2235                        $author) .
2236                "</$tag>";
2237 }
2238
2239 # format git diff header line, i.e. "diff --(git|combined|cc) ..."
2240 sub format_git_diff_header_line {
2241         my $line = shift;
2242         my $diffinfo = shift;
2243         my ($from, $to) = @_;
2244
2245         if ($diffinfo->{'nparents'}) {
2246                 # combined diff
2247                 $line =~ s!^(diff (.*?) )"?.*$!$1!;
2248                 if ($to->{'href'}) {
2249                         $line .= $cgi->a({-href => $to->{'href'}, -class => "path"},
2250                                          esc_path($to->{'file'}));
2251                 } else { # file was deleted (no href)
2252                         $line .= esc_path($to->{'file'});
2253                 }
2254         } else {
2255                 # "ordinary" diff
2256                 $line =~ s!^(diff (.*?) )"?a/.*$!$1!;
2257                 if ($from->{'href'}) {
2258                         $line .= $cgi->a({-href => $from->{'href'}, -class => "path"},
2259                                          'a/' . esc_path($from->{'file'}));
2260                 } else { # file was added (no href)
2261                         $line .= 'a/' . esc_path($from->{'file'});
2262                 }
2263                 $line .= ' ';
2264                 if ($to->{'href'}) {
2265                         $line .= $cgi->a({-href => $to->{'href'}, -class => "path"},
2266                                          'b/' . esc_path($to->{'file'}));
2267                 } else { # file was deleted
2268                         $line .= 'b/' . esc_path($to->{'file'});
2269                 }
2270         }
2271
2272         return "<div class=\"diff header\">$line</div>\n";
2273 }
2274
2275 # format extended diff header line, before patch itself
2276 sub format_extended_diff_header_line {
2277         my $line = shift;
2278         my $diffinfo = shift;
2279         my ($from, $to) = @_;
2280
2281         # match <path>
2282         if ($line =~ s!^((copy|rename) from ).*$!$1! && $from->{'href'}) {
2283                 $line .= $cgi->a({-href=>$from->{'href'}, -class=>"path"},
2284                                        esc_path($from->{'file'}));
2285         }
2286         if ($line =~ s!^((copy|rename) to ).*$!$1! && $to->{'href'}) {
2287                 $line .= $cgi->a({-href=>$to->{'href'}, -class=>"path"},
2288                                  esc_path($to->{'file'}));
2289         }
2290         # match single <mode>
2291         if ($line =~ m/\s(\d{6})$/) {
2292                 $line .= '<span class="info"> (' .
2293                          file_type_long($1) .
2294                          ')</span>';
2295         }
2296         # match <hash>
2297         if ($line =~ m/^index [0-9a-fA-F]{40},[0-9a-fA-F]{40}/) {
2298                 # can match only for combined diff
2299                 $line = 'index ';
2300                 for (my $i = 0; $i < $diffinfo->{'nparents'}; $i++) {
2301                         if ($from->{'href'}[$i]) {
2302                                 $line .= $cgi->a({-href=>$from->{'href'}[$i],
2303                                                   -class=>"hash"},
2304                                                  substr($diffinfo->{'from_id'}[$i],0,7));
2305                         } else {
2306                                 $line .= '0' x 7;
2307                         }
2308                         # separator
2309                         $line .= ',' if ($i < $diffinfo->{'nparents'} - 1);
2310                 }
2311                 $line .= '..';
2312                 if ($to->{'href'}) {
2313                         $line .= $cgi->a({-href=>$to->{'href'}, -class=>"hash"},
2314                                          substr($diffinfo->{'to_id'},0,7));
2315                 } else {
2316                         $line .= '0' x 7;
2317                 }
2318
2319         } elsif ($line =~ m/^index [0-9a-fA-F]{40}..[0-9a-fA-F]{40}/) {
2320                 # can match only for ordinary diff
2321                 my ($from_link, $to_link);
2322                 if ($from->{'href'}) {
2323                         $from_link = $cgi->a({-href=>$from->{'href'}, -class=>"hash"},
2324                                              substr($diffinfo->{'from_id'},0,7));
2325                 } else {
2326                         $from_link = '0' x 7;
2327                 }
2328                 if ($to->{'href'}) {
2329                         $to_link = $cgi->a({-href=>$to->{'href'}, -class=>"hash"},
2330                                            substr($diffinfo->{'to_id'},0,7));
2331                 } else {
2332                         $to_link = '0' x 7;
2333                 }
2334                 my ($from_id, $to_id) = ($diffinfo->{'from_id'}, $diffinfo->{'to_id'});
2335                 $line =~ s!$from_id\.\.$to_id!$from_link..$to_link!;
2336         }
2337
2338         return $line . "<br/>\n";
2339 }
2340
2341 # format from-file/to-file diff header
2342 sub format_diff_from_to_header {
2343         my ($from_line, $to_line, $diffinfo, $from, $to, @parents) = @_;
2344         my $line;
2345         my $result = '';
2346
2347         $line = $from_line;
2348         #assert($line =~ m/^---/) if DEBUG;
2349         # no extra formatting for "^--- /dev/null"
2350         if (! $diffinfo->{'nparents'}) {
2351                 # ordinary (single parent) diff
2352                 if ($line =~ m!^--- "?a/!) {
2353                         if ($from->{'href'}) {
2354                                 $line = '--- a/' .
2355                                         $cgi->a({-href=>$from->{'href'}, -class=>"path"},
2356                                                 esc_path($from->{'file'}));
2357                         } else {
2358                                 $line = '--- a/' .
2359                                         esc_path($from->{'file'});
2360                         }
2361                 }
2362                 $result .= qq!<div class="diff from_file">$line</div>\n!;
2363
2364         } else {
2365                 # combined diff (merge commit)
2366                 for (my $i = 0; $i < $diffinfo->{'nparents'}; $i++) {
2367                         if ($from->{'href'}[$i]) {
2368                                 $line = '--- ' .
2369                                         $cgi->a({-href=>href(action=>"blobdiff",
2370                                                              hash_parent=>$diffinfo->{'from_id'}[$i],
2371                                                              hash_parent_base=>$parents[$i],
2372                                                              file_parent=>$from->{'file'}[$i],
2373                                                              hash=>$diffinfo->{'to_id'},
2374                                                              hash_base=>$hash,
2375                                                              file_name=>$to->{'file'}),
2376                                                  -class=>"path",
2377                                                  -title=>"diff" . ($i+1)},
2378                                                 $i+1) .
2379                                         '/' .
2380                                         $cgi->a({-href=>$from->{'href'}[$i], -class=>"path"},
2381                                                 esc_path($from->{'file'}[$i]));
2382                         } else {
2383                                 $line = '--- /dev/null';
2384                         }
2385                         $result .= qq!<div class="diff from_file">$line</div>\n!;
2386                 }
2387         }
2388
2389         $line = $to_line;
2390         #assert($line =~ m/^\+\+\+/) if DEBUG;
2391         # no extra formatting for "^+++ /dev/null"
2392         if ($line =~ m!^\+\+\+ "?b/!) {
2393                 if ($to->{'href'}) {
2394                         $line = '+++ b/' .
2395                                 $cgi->a({-href=>$to->{'href'}, -class=>"path"},
2396                                         esc_path($to->{'file'}));
2397                 } else {
2398                         $line = '+++ b/' .
2399                                 esc_path($to->{'file'});
2400                 }
2401         }
2402         $result .= qq!<div class="diff to_file">$line</div>\n!;
2403
2404         return $result;
2405 }
2406
2407 # create note for patch simplified by combined diff
2408 sub format_diff_cc_simplified {
2409         my ($diffinfo, @parents) = @_;
2410         my $result = '';
2411
2412         $result .= "<div class=\"diff header\">" .
2413                    "diff --cc ";
2414         if (!is_deleted($diffinfo)) {
2415                 $result .= $cgi->a({-href => href(action=>"blob",
2416                                                   hash_base=>$hash,
2417                                                   hash=>$diffinfo->{'to_id'},
2418                                                   file_name=>$diffinfo->{'to_file'}),
2419                                     -class => "path"},
2420                                    esc_path($diffinfo->{'to_file'}));
2421         } else {
2422                 $result .= esc_path($diffinfo->{'to_file'});
2423         }
2424         $result .= "</div>\n" . # class="diff header"
2425                    "<div class=\"diff nodifferences\">" .
2426                    "Simple merge" .
2427                    "</div>\n"; # class="diff nodifferences"
2428
2429         return $result;
2430 }
2431
2432 sub diff_line_class {
2433         my ($line, $from, $to) = @_;
2434
2435         # ordinary diff
2436         my $num_sign = 1;
2437         # combined diff
2438         if ($from && $to && ref($from->{'href'}) eq "ARRAY") {
2439                 $num_sign = scalar @{$from->{'href'}};
2440         }
2441
2442         my @diff_line_classifier = (
2443                 { regexp => qr/^\@\@{$num_sign} /, class => "chunk_header"},
2444                 { regexp => qr/^\\/,               class => "incomplete"  },
2445                 { regexp => qr/^ {$num_sign}/,     class => "ctx" },
2446                 # classifier for context must come before classifier add/rem,
2447                 # or we would have to use more complicated regexp, for example
2448                 # qr/(?= {0,$m}\+)[+ ]{$num_sign}/, where $m = $num_sign - 1;
2449                 { regexp => qr/^[+ ]{$num_sign}/,   class => "add" },
2450                 { regexp => qr/^[- ]{$num_sign}/,   class => "rem" },
2451         );
2452         for my $clsfy (@diff_line_classifier) {
2453                 return $clsfy->{'class'}
2454                         if ($line =~ $clsfy->{'regexp'});
2455         }
2456
2457         # fallback
2458         return "";
2459 }
2460
2461 # assumes that $from and $to are defined and correctly filled,
2462 # and that $line holds a line of chunk header for unified diff
2463 sub format_unidiff_chunk_header {
2464         my ($line, $from, $to) = @_;
2465
2466         my ($from_text, $from_start, $from_lines, $to_text, $to_start, $to_lines, $section) =
2467                 $line =~ m/^\@{2} (-(\d+)(?:,(\d+))?) (\+(\d+)(?:,(\d+))?) \@{2}(.*)$/;
2468
2469         $from_lines = 0 unless defined $from_lines;
2470         $to_lines   = 0 unless defined $to_lines;
2471
2472         if ($from->{'href'}) {
2473                 $from_text = $cgi->a({-href=>"$from->{'href'}#l$from_start",
2474                                      -class=>"list"}, $from_text);
2475         }
2476         if ($to->{'href'}) {
2477                 $to_text   = $cgi->a({-href=>"$to->{'href'}#l$to_start",
2478                                      -class=>"list"}, $to_text);
2479         }
2480         $line = "<span class=\"chunk_info\">@@ $from_text $to_text @@</span>" .
2481                 "<span class=\"section\">" . esc_html($section, -nbsp=>1) . "</span>";
2482         return $line;
2483 }
2484
2485 # assumes that $from and $to are defined and correctly filled,
2486 # and that $line holds a line of chunk header for combined diff
2487 sub format_cc_diff_chunk_header {
2488         my ($line, $from, $to) = @_;
2489
2490         my ($prefix, $ranges, $section) = $line =~ m/^(\@+) (.*?) \@+(.*)$/;
2491         my (@from_text, @from_start, @from_nlines, $to_text, $to_start, $to_nlines);
2492
2493         @from_text = split(' ', $ranges);
2494         for (my $i = 0; $i < @from_text; ++$i) {
2495                 ($from_start[$i], $from_nlines[$i]) =
2496                         (split(',', substr($from_text[$i], 1)), 0);
2497         }
2498
2499         $to_text   = pop @from_text;
2500         $to_start  = pop @from_start;
2501         $to_nlines = pop @from_nlines;
2502
2503         $line = "<span class=\"chunk_info\">$prefix ";
2504         for (my $i = 0; $i < @from_text; ++$i) {
2505                 if ($from->{'href'}[$i]) {
2506                         $line .= $cgi->a({-href=>"$from->{'href'}[$i]#l$from_start[$i]",
2507                                           -class=>"list"}, $from_text[$i]);
2508                 } else {
2509                         $line .= $from_text[$i];
2510                 }
2511                 $line .= " ";
2512         }
2513         if ($to->{'href'}) {
2514                 $line .= $cgi->a({-href=>"$to->{'href'}#l$to_start",
2515                                   -class=>"list"}, $to_text);
2516         } else {
2517                 $line .= $to_text;
2518         }
2519         $line .= " $prefix</span>" .
2520                  "<span class=\"section\">" . esc_html($section, -nbsp=>1) . "</span>";
2521         return $line;
2522 }
2523
2524 # process patch (diff) line (not to be used for diff headers),
2525 # returning HTML-formatted (but not wrapped) line.
2526 # If the line is passed as a reference, it is treated as HTML and not
2527 # esc_html()'ed.
2528 sub format_diff_line {
2529         my ($line, $diff_class, $from, $to) = @_;
2530
2531         if (ref($line)) {
2532                 $line = $$line;
2533         } else {
2534                 chomp $line;
2535                 $line = untabify($line);
2536
2537                 if ($from && $to && $line =~ m/^\@{2} /) {
2538                         $line = format_unidiff_chunk_header($line, $from, $to);
2539                 } elsif ($from && $to && $line =~ m/^\@{3}/) {
2540                         $line = format_cc_diff_chunk_header($line, $from, $to);
2541                 } else {
2542                         $line = esc_html($line, -nbsp=>1);
2543                 }
2544         }
2545
2546         my $diff_classes = "diff";
2547         $diff_classes .= " $diff_class" if ($diff_class);
2548         $line = "<div class=\"$diff_classes\">$line</div>\n";
2549
2550         return $line;
2551 }
2552
2553 # Generates undef or something like "_snapshot_" or "snapshot (_tbz2_ _zip_)",
2554 # linked.  Pass the hash of the tree/commit to snapshot.
2555 sub format_snapshot_links {
2556         my ($hash) = @_;
2557         my $num_fmts = @snapshot_fmts;
2558         if ($num_fmts > 1) {
2559                 # A parenthesized list of links bearing format names.
2560                 # e.g. "snapshot (_tar.gz_ _zip_)"
2561                 return "snapshot (" . join(' ', map
2562                         $cgi->a({
2563                                 -href => href(
2564                                         action=>"snapshot",
2565                                         hash=>$hash,
2566                                         snapshot_format=>$_
2567                                 )
2568                         }, $known_snapshot_formats{$_}{'display'})
2569                 , @snapshot_fmts) . ")";
2570         } elsif ($num_fmts == 1) {
2571                 # A single "snapshot" link whose tooltip bears the format name.
2572                 # i.e. "_snapshot_"
2573                 my ($fmt) = @snapshot_fmts;
2574                 return
2575                         $cgi->a({
2576                                 -href => href(
2577                                         action=>"snapshot",
2578                                         hash=>$hash,
2579                                         snapshot_format=>$fmt
2580                                 ),
2581                                 -title => "in format: $known_snapshot_formats{$fmt}{'display'}"
2582                         }, "snapshot");
2583         } else { # $num_fmts == 0
2584                 return undef;
2585         }
2586 }
2587
2588 ## ......................................................................
2589 ## functions returning values to be passed, perhaps after some
2590 ## transformation, to other functions; e.g. returning arguments to href()
2591
2592 # returns hash to be passed to href to generate gitweb URL
2593 # in -title key it returns description of link
2594 sub get_feed_info {
2595         my $format = shift || 'Atom';
2596         my %res = (action => lc($format));
2597         my $matched_ref = 0;
2598
2599         # feed links are possible only for project views
2600         return unless (defined $project);
2601         # some views should link to OPML, or to generic project feed,
2602         # or don't have specific feed yet (so they should use generic)
2603         return if (!$action || $action =~ /^(?:tags|heads|forks|tag|search)$/x);
2604
2605         my $branch = undef;
2606         # branches refs uses 'refs/' + $get_branch_refs()[x] + '/' prefix
2607         # (fullname) to differentiate from tag links; this also makes
2608         # possible to detect branch links
2609         for my $ref (get_branch_refs()) {
2610                 if ((defined $hash_base && $hash_base =~ m!^refs/\Q$ref\E/(.*)$!) ||
2611                     (defined $hash      && $hash      =~ m!^refs/\Q$ref\E/(.*)$!)) {
2612                         $branch = $1;
2613                         $matched_ref = $ref;
2614                         last;
2615                 }
2616         }
2617         # find log type for feed description (title)
2618         my $type = 'log';
2619         if (defined $file_name) {
2620                 $type  = "history of $file_name";
2621                 $type .= "/" if ($action eq 'tree');
2622                 $type .= " on '$branch'" if (defined $branch);
2623         } else {
2624                 $type = "log of $branch" if (defined $branch);
2625         }
2626
2627         $res{-title} = $type;
2628         $res{'hash'} = (defined $branch ? "refs/$matched_ref/$branch" : undef);
2629         $res{'file_name'} = $file_name;
2630
2631         return %res;
2632 }
2633
2634 ## ----------------------------------------------------------------------
2635 ## git utility subroutines, invoking git commands
2636
2637 # returns path to the core git executable and the --git-dir parameter as list
2638 sub git_cmd {
2639         $number_of_git_cmds++;
2640         return $GIT, '--git-dir='.$git_dir;
2641 }
2642
2643 # quote the given arguments for passing them to the shell
2644 # quote_command("command", "arg 1", "arg with ' and ! characters")
2645 # => "'command' 'arg 1' 'arg with '\'' and '\!' characters'"
2646 # Try to avoid using this function wherever possible.
2647 sub quote_command {
2648         return join(' ',
2649                 map { my $a = $_; $a =~ s/(['!])/'\\$1'/g; "'$a'" } @_ );
2650 }
2651
2652 # get HEAD ref of given project as hash
2653 sub git_get_head_hash {
2654         return git_get_full_hash(shift, 'HEAD');
2655 }
2656
2657 sub git_get_full_hash {
2658         return git_get_hash(@_);
2659 }
2660
2661 sub git_get_short_hash {
2662         return git_get_hash(@_, '--short=7');
2663 }
2664
2665 sub git_get_hash {
2666         my ($project, $hash, @options) = @_;
2667         my $o_git_dir = $git_dir;
2668         my $retval = undef;
2669         $git_dir = "$projectroot/$project";
2670         if (open my $fd, '-|', git_cmd(), 'rev-parse',
2671             '--verify', '-q', @options, $hash) {
2672                 $retval = <$fd>;
2673                 chomp $retval if defined $retval;
2674                 close $fd;
2675         }
2676         if (defined $o_git_dir) {
2677                 $git_dir = $o_git_dir;
2678         }
2679         return $retval;
2680 }
2681
2682 # get type of given object
2683 sub git_get_type {
2684         my $hash = shift;
2685
2686         open my $fd, "-|", git_cmd(), "cat-file", '-t', $hash or return;
2687         my $type = <$fd>;
2688         close $fd or return;
2689         chomp $type;
2690         return $type;
2691 }
2692
2693 # repository configuration
2694 our $config_file = '';
2695 our %config;
2696
2697 # store multiple values for single key as anonymous array reference
2698 # single values stored directly in the hash, not as [ <value> ]
2699 sub hash_set_multi {
2700         my ($hash, $key, $value) = @_;
2701
2702         if (!exists $hash->{$key}) {
2703                 $hash->{$key} = $value;
2704         } elsif (!ref $hash->{$key}) {
2705                 $hash->{$key} = [ $hash->{$key}, $value ];
2706         } else {
2707                 push @{$hash->{$key}}, $value;
2708         }
2709 }
2710
2711 # return hash of git project configuration
2712 # optionally limited to some section, e.g. 'gitweb'
2713 sub git_parse_project_config {
2714         my $section_regexp = shift;
2715         my %config;
2716
2717         local $/ = "\0";
2718
2719         open my $fh, "-|", git_cmd(), "config", '-z', '-l',
2720                 or return;
2721
2722         while (my $keyval = <$fh>) {
2723                 chomp $keyval;
2724                 my ($key, $value) = split(/\n/, $keyval, 2);
2725
2726                 hash_set_multi(\%config, $key, $value)
2727                         if (!defined $section_regexp || $key =~ /^(?:$section_regexp)\./o);
2728         }
2729         close $fh;
2730
2731         return %config;
2732 }
2733
2734 # convert config value to boolean: 'true' or 'false'
2735 # no value, number > 0, 'true' and 'yes' values are true
2736 # rest of values are treated as false (never as error)
2737 sub config_to_bool {
2738         my $val = shift;
2739
2740         return 1 if !defined $val;             # section.key
2741
2742         # strip leading and trailing whitespace
2743         $val =~ s/^\s+//;
2744         $val =~ s/\s+$//;
2745
2746         return (($val =~ /^\d+$/ && $val) ||   # section.key = 1
2747                 ($val =~ /^(?:true|yes)$/i));  # section.key = true
2748 }
2749
2750 # convert config value to simple decimal number
2751 # an optional value suffix of 'k', 'm', or 'g' will cause the value
2752 # to be multiplied by 1024, 1048576, or 1073741824
2753 sub config_to_int {
2754         my $val = shift;
2755
2756         # strip leading and trailing whitespace
2757         $val =~ s/^\s+//;
2758         $val =~ s/\s+$//;
2759
2760         if (my ($num, $unit) = ($val =~ /^([0-9]*)([kmg])$/i)) {
2761                 $unit = lc($unit);
2762                 # unknown unit is treated as 1
2763                 return $num * ($unit eq 'g' ? 1073741824 :
2764                                $unit eq 'm' ?    1048576 :
2765                                $unit eq 'k' ?       1024 : 1);
2766         }
2767         return $val;
2768 }
2769
2770 # convert config value to array reference, if needed
2771 sub config_to_multi {
2772         my $val = shift;
2773
2774         return ref($val) ? $val : (defined($val) ? [ $val ] : []);
2775 }
2776
2777 sub git_get_project_config {
2778         my ($key, $type) = @_;
2779
2780         return unless defined $git_dir;
2781
2782         # key sanity check
2783         return unless ($key);
2784         # only subsection, if exists, is case sensitive,
2785         # and not lowercased by 'git config -z -l'
2786         if (my ($hi, $mi, $lo) = ($key =~ /^([^.]*)\.(.*)\.([^.]*)$/)) {
2787                 $lo =~ s/_//g;
2788                 $key = join(".", lc($hi), $mi, lc($lo));
2789                 return if ($lo =~ /\W/ || $hi =~ /\W/);
2790         } else {
2791                 $key = lc($key);
2792                 $key =~ s/_//g;
2793                 return if ($key =~ /\W/);
2794         }
2795         $key =~ s/^gitweb\.//;
2796
2797         # type sanity check
2798         if (defined $type) {
2799                 $type =~ s/^--//;
2800                 $type = undef
2801                         unless ($type eq 'bool' || $type eq 'int');
2802         }
2803
2804         # get config
2805         if (!defined $config_file ||
2806             $config_file ne "$git_dir/config") {
2807                 %config = git_parse_project_config('gitweb');
2808                 $config_file = "$git_dir/config";
2809         }
2810
2811         # check if config variable (key) exists
2812         return unless exists $config{"gitweb.$key"};
2813
2814         # ensure given type
2815         if (!defined $type) {
2816                 return $config{"gitweb.$key"};
2817         } elsif ($type eq 'bool') {
2818                 # backward compatibility: 'git config --bool' returns true/false
2819                 return config_to_bool($config{"gitweb.$key"}) ? 'true' : 'false';
2820         } elsif ($type eq 'int') {
2821                 return config_to_int($config{"gitweb.$key"});
2822         }
2823         return $config{"gitweb.$key"};
2824 }
2825
2826 # get hash of given path at given ref
2827 sub git_get_hash_by_path {
2828         my $base = shift;
2829         my $path = shift || return undef;
2830         my $type = shift;
2831
2832         $path =~ s,/+$,,;
2833
2834         open my $fd, "-|", git_cmd(), "ls-tree", $base, "--", $path
2835                 or die_error(500, "Open git-ls-tree failed");
2836         my $line = <$fd>;
2837         close $fd or return undef;
2838
2839         if (!defined $line) {
2840                 # there is no tree or hash given by $path at $base
2841                 return undef;
2842         }
2843
2844         #'100644 blob 0fa3f3a66fb6a137f6ec2c19351ed4d807070ffa  panic.c'
2845         $line =~ m/^([0-9]+) (.+) ([0-9a-fA-F]{40})\t/;
2846         if (defined $type && $type ne $2) {
2847                 # type doesn't match
2848                 return undef;
2849         }
2850         return $3;
2851 }
2852
2853 # get path of entry with given hash at given tree-ish (ref)
2854 # used to get 'from' filename for combined diff (merge commit) for renames
2855 sub git_get_path_by_hash {
2856         my $base = shift || return;
2857         my $hash = shift || return;
2858
2859         local $/ = "\0";
2860
2861         open my $fd, "-|", git_cmd(), "ls-tree", '-r', '-t', '-z', $base
2862                 or return undef;
2863         while (my $line = <$fd>) {
2864                 chomp $line;
2865
2866                 #'040000 tree 595596a6a9117ddba9fe379b6b012b558bac8423  gitweb'
2867                 #'100644 blob e02e90f0429be0d2a69b76571101f20b8f75530f  gitweb/README'
2868                 if ($line =~ m/(?:[0-9]+) (?:.+) $hash\t(.+)$/) {
2869                         close $fd;
2870                         return $1;
2871                 }
2872         }
2873         close $fd;
2874         return undef;
2875 }
2876
2877 ## ......................................................................
2878 ## git utility functions, directly accessing git repository
2879
2880 # get the value of config variable either from file named as the variable
2881 # itself in the repository ($GIT_DIR/$name file), or from gitweb.$name
2882 # configuration variable in the repository config file.
2883 sub git_get_file_or_project_config {
2884         my ($path, $name) = @_;
2885
2886         $git_dir = "$projectroot/$path";
2887         open my $fd, '<', "$git_dir/$name"
2888                 or return git_get_project_config($name);
2889         my $conf = <$fd>;
2890         close $fd;
2891         if (defined $conf) {
2892                 chomp $conf;
2893         }
2894         return $conf;
2895 }
2896
2897 sub git_get_project_description {
2898         my $path = shift;
2899         return git_get_file_or_project_config($path, 'description');
2900 }
2901
2902 sub git_get_project_category {
2903         my $path = shift;
2904         return git_get_file_or_project_config($path, 'category');
2905 }
2906
2907
2908 # supported formats:
2909 # * $GIT_DIR/ctags/<tagname> file (in 'ctags' subdirectory)
2910 #   - if its contents is a number, use it as tag weight,
2911 #   - otherwise add a tag with weight 1
2912 # * $GIT_DIR/ctags file, each line is a tag (with weight 1)
2913 #   the same value multiple times increases tag weight
2914 # * `gitweb.ctag' multi-valued repo config variable
2915 sub git_get_project_ctags {
2916         my $project = shift;
2917         my $ctags = {};
2918
2919         $git_dir = "$projectroot/$project";
2920         if (opendir my $dh, "$git_dir/ctags") {
2921                 my @files = grep { -f $_ } map { "$git_dir/ctags/$_" } readdir($dh);
2922                 foreach my $tagfile (@files) {
2923                         open my $ct, '<', $tagfile
2924                                 or next;
2925                         my $val = <$ct>;
2926                         chomp $val if $val;
2927                         close $ct;
2928
2929                         (my $ctag = $tagfile) =~ s#.*/##;
2930                         if ($val =~ /^\d+$/) {
2931                                 $ctags->{$ctag} = $val;
2932                         } else {
2933                                 $ctags->{$ctag} = 1;
2934                         }
2935                 }
2936                 closedir $dh;
2937
2938         } elsif (open my $fh, '<', "$git_dir/ctags") {
2939                 while (my $line = <$fh>) {
2940                         chomp $line;
2941                         $ctags->{$line}++ if $line;
2942                 }
2943                 close $fh;
2944
2945         } else {
2946                 my $taglist = config_to_multi(git_get_project_config('ctag'));
2947                 foreach my $tag (@$taglist) {
2948                         $ctags->{$tag}++;
2949                 }
2950         }
2951
2952         return $ctags;
2953 }
2954
2955 # return hash, where keys are content tags ('ctags'),
2956 # and values are sum of weights of given tag in every project
2957 sub git_gather_all_ctags {
2958         my $projects = shift;
2959         my $ctags = {};
2960
2961         foreach my $p (@$projects) {
2962                 foreach my $ct (keys %{$p->{'ctags'}}) {
2963                         $ctags->{$ct} += $p->{'ctags'}->{$ct};
2964                 }
2965         }
2966
2967         return $ctags;
2968 }
2969
2970 sub git_populate_project_tagcloud {
2971         my ($ctags, $action) = @_;
2972
2973         # First, merge different-cased tags; tags vote on casing
2974         my %ctags_lc;
2975         foreach (keys %$ctags) {
2976                 $ctags_lc{lc $_}->{count} += $ctags->{$_};
2977                 if (not $ctags_lc{lc $_}->{topcount}
2978                     or $ctags_lc{lc $_}->{topcount} < $ctags->{$_}) {
2979                         $ctags_lc{lc $_}->{topcount} = $ctags->{$_};
2980                         $ctags_lc{lc $_}->{topname} = $_;
2981                 }
2982         }
2983
2984         my $cloud;
2985         my $matched = $input_params{'ctag_filter'};
2986         if (eval { require HTML::TagCloud; 1; }) {
2987                 $cloud = HTML::TagCloud->new;
2988                 foreach my $ctag (sort keys %ctags_lc) {
2989                         # Pad the title with spaces so that the cloud looks
2990                         # less crammed.
2991                         my $title = esc_html($ctags_lc{$ctag}->{topname});
2992                         $title =~ s/ /&nbsp;/g;
2993                         $title =~ s/^/&nbsp;/g;
2994                         $title =~ s/$/&nbsp;/g;
2995                         if (defined $matched && $matched eq $ctag) {
2996                                 $title = qq(<span class="match">$title</span>);
2997                         }
2998                         $cloud->add($title, href(-replay=>1, action=>$action, ctag_filter=>$ctag),
2999                                     $ctags_lc{$ctag}->{count});
3000                 }
3001         } else {
3002                 $cloud = {};
3003                 foreach my $ctag (keys %ctags_lc) {
3004                         my $title = esc_html($ctags_lc{$ctag}->{topname}, -nbsp=>1);
3005                         if (defined $matched && $matched eq $ctag) {
3006                                 $title = qq(<span class="match">$title</span>);
3007                         }
3008                         $cloud->{$ctag}{count} = $ctags_lc{$ctag}->{count};
3009                         $cloud->{$ctag}{ctag} =
3010                                 $cgi->a({-href=>href(-replay=>1, action=>$action, ctag_filter=>$ctag)}, $title);
3011                 }
3012         }
3013         return $cloud;
3014 }
3015
3016 sub git_show_project_tagcloud {
3017         my ($cloud, $count) = @_;
3018         if (ref $cloud eq 'HTML::TagCloud') {
3019                 return $cloud->html_and_css($count);
3020         } else {
3021                 my @tags = sort { $cloud->{$a}->{'count'} <=> $cloud->{$b}->{'count'} } keys %$cloud;
3022                 return
3023                         '<div id="htmltagcloud"'.($project ? '' : ' align="center"').'>' .
3024                         join (', ', map {
3025                                 $cloud->{$_}->{'ctag'}
3026                         } splice(@tags, 0, $count)) .
3027                         '</div>';
3028         }
3029 }
3030
3031 sub git_get_project_url_list {
3032         my $path = shift;
3033
3034         $git_dir = "$projectroot/$path";
3035         open my $fd, '<', "$git_dir/cloneurl"
3036                 or return wantarray ?
3037                 @{ config_to_multi(git_get_project_config('url')) } :
3038                    config_to_multi(git_get_project_config('url'));
3039         my @git_project_url_list = map { chomp; $_ } <$fd>;
3040         close $fd;
3041
3042         return wantarray ? @git_project_url_list : \@git_project_url_list;
3043 }
3044
3045 sub git_get_projects_list {
3046         my $filter = shift || '';
3047         my $paranoid = shift;
3048         my @list;
3049
3050         if (-d $projects_list) {
3051                 # search in directory
3052                 my $dir = $projects_list;
3053                 # remove the trailing "/"
3054                 $dir =~ s!/+$!!;
3055                 my $pfxlen = length("$dir");
3056                 my $pfxdepth = ($dir =~ tr!/!!);
3057                 # when filtering, search only given subdirectory
3058                 if ($filter && !$paranoid) {
3059                         $dir .= "/$filter";
3060                         $dir =~ s!/+$!!;
3061                 }
3062
3063                 File::Find::find({
3064                         follow_fast => 1, # follow symbolic links
3065                         follow_skip => 2, # ignore duplicates
3066                         dangling_symlinks => 0, # ignore dangling symlinks, silently
3067                         wanted => sub {
3068                                 # global variables
3069                                 our $project_maxdepth;
3070                                 our $projectroot;
3071                                 # skip project-list toplevel, if we get it.
3072                                 return if (m!^[/.]$!);
3073                                 # only directories can be git repositories
3074                                 return unless (-d $_);
3075                                 # don't traverse too deep (Find is super slow on os x)
3076                                 # $project_maxdepth excludes depth of $projectroot
3077                                 if (($File::Find::name =~ tr!/!!) - $pfxdepth > $project_maxdepth) {
3078                                         $File::Find::prune = 1;
3079                                         return;
3080                                 }
3081
3082                                 my $path = substr($File::Find::name, $pfxlen + 1);
3083                                 # paranoidly only filter here
3084                                 if ($paranoid && $filter && $path !~ m!^\Q$filter\E/!) {
3085                                         next;
3086                                 }
3087                                 # we check related file in $projectroot
3088                                 if (check_export_ok("$projectroot/$path")) {
3089                                         push @list, { path => $path };
3090                                         $File::Find::prune = 1;
3091                                 }
3092                         },
3093                 }, "$dir");
3094
3095         } elsif (-f $projects_list) {
3096                 # read from file(url-encoded):
3097                 # 'git%2Fgit.git Linus+Torvalds'
3098                 # 'libs%2Fklibc%2Fklibc.git H.+Peter+Anvin'
3099                 # 'linux%2Fhotplug%2Fudev.git Greg+Kroah-Hartman'
3100                 open my $fd, '<', $projects_list or return;
3101         PROJECT:
3102                 while (my $line = <$fd>) {
3103                         chomp $line;
3104                         my ($path, $owner) = split ' ', $line;
3105                         $path = unescape($path);
3106                         $owner = unescape($owner);
3107                         if (!defined $path) {
3108                                 next;
3109                         }
3110                         # if $filter is rpovided, check if $path begins with $filter
3111                         if ($filter && $path !~ m!^\Q$filter\E/!) {
3112                                 next;
3113                         }
3114                         if (check_export_ok("$projectroot/$path")) {
3115                                 my $pr = {
3116                                         path => $path
3117                                 };
3118                                 if ($owner) {
3119                                         $pr->{'owner'} = to_utf8($owner);
3120                                 }
3121                                 push @list, $pr;
3122                         }
3123                 }
3124                 close $fd;
3125         }
3126         return @list;
3127 }
3128
3129 # written with help of Tree::Trie module (Perl Artistic License, GPL compatibile)
3130 # as side effects it sets 'forks' field to list of forks for forked projects
3131 sub filter_forks_from_projects_list {
3132         my $projects = shift;
3133
3134         my %trie; # prefix tree of directories (path components)
3135         # generate trie out of those directories that might contain forks
3136         foreach my $pr (@$projects) {
3137                 my $path = $pr->{'path'};
3138                 $path =~ s/\.git$//;      # forks of 'repo.git' are in 'repo/' directory
3139                 next if ($path =~ m!/$!); # skip non-bare repositories, e.g. 'repo/.git'
3140                 next unless ($path);      # skip '.git' repository: tests, git-instaweb
3141                 next unless (-d "$projectroot/$path"); # containing directory exists
3142                 $pr->{'forks'} = [];      # there can be 0 or more forks of project
3143
3144                 # add to trie
3145                 my @dirs = split('/', $path);
3146                 # walk the trie, until either runs out of components or out of trie
3147                 my $ref = \%trie;
3148                 while (scalar @dirs &&
3149                        exists($ref->{$dirs[0]})) {
3150                         $ref = $ref->{shift @dirs};
3151                 }
3152                 # create rest of trie structure from rest of components
3153                 foreach my $dir (@dirs) {
3154                         $ref = $ref->{$dir} = {};
3155                 }
3156                 # create end marker, store $pr as a data
3157                 $ref->{''} = $pr if (!exists $ref->{''});
3158         }
3159
3160         # filter out forks, by finding shortest prefix match for paths
3161         my @filtered;
3162  PROJECT:
3163         foreach my $pr (@$projects) {
3164                 # trie lookup
3165                 my $ref = \%trie;
3166         DIR:
3167                 foreach my $dir (split('/', $pr->{'path'})) {
3168                         if (exists $ref->{''}) {
3169                                 # found [shortest] prefix, is a fork - skip it
3170                                 push @{$ref->{''}{'forks'}}, $pr;
3171                                 next PROJECT;
3172                         }
3173                         if (!exists $ref->{$dir}) {
3174                                 # not in trie, cannot have prefix, not a fork
3175                                 push @filtered, $pr;
3176                                 next PROJECT;
3177                         }
3178                         # If the dir is there, we just walk one step down the trie.
3179                         $ref = $ref->{$dir};
3180                 }
3181                 # we ran out of trie
3182                 # (shouldn't happen: it's either no match, or end marker)
3183                 push @filtered, $pr;
3184         }
3185
3186         return @filtered;
3187 }
3188
3189 # note: fill_project_list_info must be run first,
3190 # for 'descr_long' and 'ctags' to be filled
3191 sub search_projects_list {
3192         my ($projlist, %opts) = @_;
3193         my $tagfilter  = $opts{'tagfilter'};
3194         my $search_re = $opts{'search_regexp'};
3195
3196         return @$projlist
3197                 unless ($tagfilter || $search_re);
3198
3199         # searching projects require filling to be run before it;
3200         fill_project_list_info($projlist,
3201                                $tagfilter  ? 'ctags' : (),
3202                                $search_re ? ('path', 'descr') : ());
3203         my @projects;
3204  PROJECT:
3205         foreach my $pr (@$projlist) {
3206
3207                 if ($tagfilter) {
3208                         next unless ref($pr->{'ctags'}) eq 'HASH';
3209                         next unless
3210                                 grep { lc($_) eq lc($tagfilter) } keys %{$pr->{'ctags'}};
3211                 }
3212
3213                 if ($search_re) {
3214                         next unless
3215                                 $pr->{'path'} =~ /$search_re/ ||
3216                                 $pr->{'descr_long'} =~ /$search_re/;
3217                 }
3218
3219                 push @projects, $pr;
3220         }
3221
3222         return @projects;
3223 }
3224
3225 our $gitweb_project_owner = undef;
3226 sub git_get_project_list_from_file {
3227
3228         return if (defined $gitweb_project_owner);
3229
3230         $gitweb_project_owner = {};
3231         # read from file (url-encoded):
3232         # 'git%2Fgit.git Linus+Torvalds'
3233         # 'libs%2Fklibc%2Fklibc.git H.+Peter+Anvin'
3234         # 'linux%2Fhotplug%2Fudev.git Greg+Kroah-Hartman'
3235         if (-f $projects_list) {
3236                 open(my $fd, '<', $projects_list);
3237                 while (my $line = <$fd>) {
3238                         chomp $line;
3239                         my ($pr, $ow) = split ' ', $line;
3240                         $pr = unescape($pr);
3241                         $ow = unescape($ow);
3242                         $gitweb_project_owner->{$pr} = to_utf8($ow);
3243                 }
3244                 close $fd;
3245         }
3246 }
3247
3248 sub git_get_project_owner {
3249         my $project = shift;
3250         my $owner;
3251
3252         return undef unless $project;
3253         $git_dir = "$projectroot/$project";
3254
3255         if (!defined $gitweb_project_owner) {
3256                 git_get_project_list_from_file();
3257         }
3258
3259         if (exists $gitweb_project_owner->{$project}) {
3260                 $owner = $gitweb_project_owner->{$project};
3261         }
3262         if (!defined $owner){
3263                 $owner = git_get_project_config('owner');
3264         }
3265         if (!defined $owner) {
3266                 $owner = get_file_owner("$git_dir");
3267         }
3268
3269         return $owner;
3270 }
3271
3272 sub git_get_last_activity {
3273         my ($path) = @_;
3274         my $fd;
3275
3276         $git_dir = "$projectroot/$path";
3277         open($fd, "-|", git_cmd(), 'for-each-ref',
3278              '--format=%(committer)',
3279              '--sort=-committerdate',
3280              '--count=1',
3281              map { "refs/$_" } get_branch_refs ()) or return;
3282         my $most_recent = <$fd>;
3283         close $fd or return;
3284         if (defined $most_recent &&
3285             $most_recent =~ / (\d+) [-+][01]\d\d\d$/) {
3286                 my $timestamp = $1;
3287                 my $age = time - $timestamp;
3288                 return ($age, age_string($age));
3289         }
3290         return (undef, undef);
3291 }
3292
3293 # Implementation note: when a single remote is wanted, we cannot use 'git
3294 # remote show -n' because that command always work (assuming it's a remote URL
3295 # if it's not defined), and we cannot use 'git remote show' because that would
3296 # try to make a network roundtrip. So the only way to find if that particular
3297 # remote is defined is to walk the list provided by 'git remote -v' and stop if
3298 # and when we find what we want.
3299 sub git_get_remotes_list {
3300         my $wanted = shift;
3301         my %remotes = ();
3302
3303         open my $fd, '-|' , git_cmd(), 'remote', '-v';
3304         return unless $fd;
3305         while (my $remote = <$fd>) {
3306                 chomp $remote;
3307                 $remote =~ s!\t(.*?)\s+\((\w+)\)$!!;
3308                 next if $wanted and not $remote eq $wanted;
3309                 my ($url, $key) = ($1, $2);
3310
3311                 $remotes{$remote} ||= { 'heads' => () };
3312                 $remotes{$remote}{$key} = $url;
3313         }
3314         close $fd or return;
3315         return wantarray ? %remotes : \%remotes;
3316 }
3317
3318 # Takes a hash of remotes as first parameter and fills it by adding the
3319 # available remote heads for each of the indicated remotes.
3320 sub fill_remote_heads {
3321         my $remotes = shift;
3322         my @heads = map { "remotes/$_" } keys %$remotes;
3323         my @remoteheads = git_get_heads_list(undef, @heads);
3324         foreach my $remote (keys %$remotes) {
3325                 $remotes->{$remote}{'heads'} = [ grep {
3326                         $_->{'name'} =~ s!^$remote/!!
3327                         } @remoteheads ];
3328         }
3329 }
3330
3331 sub git_get_references {
3332         my $type = shift || "";
3333         my %refs;
3334         # 5dc01c595e6c6ec9ccda4f6f69c131c0dd945f8c refs/tags/v2.6.11
3335         # c39ae07f393806ccf406ef966e9a15afc43cc36a refs/tags/v2.6.11^{}
3336         open my $fd, "-|", git_cmd(), "show-ref", "--dereference",
3337                 ($type ? ("--", "refs/$type") : ()) # use -- <pattern> if $type
3338                 or return;
3339
3340         while (my $line = <$fd>) {
3341                 chomp $line;
3342                 if ($line =~ m!^([0-9a-fA-F]{40})\srefs/($type.*)$!) {
3343                         if (defined $refs{$1}) {
3344                                 push @{$refs{$1}}, $2;
3345                         } else {
3346                                 $refs{$1} = [ $2 ];
3347                         }
3348                 }
3349         }
3350         close $fd or return;
3351         return \%refs;
3352 }
3353
3354 sub git_get_rev_name_tags {
3355         my $hash = shift || return undef;
3356
3357         open my $fd, "-|", git_cmd(), "name-rev", "--tags", $hash
3358                 or return;
3359         my $name_rev = <$fd>;
3360         close $fd;
3361
3362         if ($name_rev =~ m|^$hash tags/(.*)$|) {
3363                 return $1;
3364         } else {
3365                 # catches also '$hash undefined' output
3366                 return undef;
3367         }
3368 }
3369
3370 ## ----------------------------------------------------------------------
3371 ## parse to hash functions
3372
3373 sub parse_date {
3374         my $epoch = shift;
3375         my $tz = shift || "-0000";
3376
3377         my %date;
3378         my @months = ("Jan", "Feb", "Mar", "Apr", "May", "Jun", "Jul", "Aug", "Sep", "Oct", "Nov", "Dec");
3379         my @days = ("Sun", "Mon", "Tue", "Wed", "Thu", "Fri", "Sat");
3380         my ($sec, $min, $hour, $mday, $mon, $year, $wday, $yday) = gmtime($epoch);
3381         $date{'hour'} = $hour;
3382         $date{'minute'} = $min;
3383         $date{'mday'} = $mday;
3384         $date{'day'} = $days[$wday];
3385         $date{'month'} = $months[$mon];
3386         $date{'rfc2822'}   = sprintf "%s, %d %s %4d %02d:%02d:%02d +0000",
3387                              $days[$wday], $mday, $months[$mon], 1900+$year, $hour ,$min, $sec;
3388         $date{'mday-time'} = sprintf "%d %s %02d:%02d",
3389                              $mday, $months[$mon], $hour ,$min;
3390         $date{'iso-8601'}  = sprintf "%04d-%02d-%02dT%02d:%02d:%02dZ",
3391                              1900+$year, 1+$mon, $mday, $hour ,$min, $sec;
3392
3393         my ($tz_sign, $tz_hour, $tz_min) =
3394                 ($tz =~ m/^([-+])(\d\d)(\d\d)$/);
3395         $tz_sign = ($tz_sign eq '-' ? -1 : +1);
3396         my $local = $epoch + $tz_sign*((($tz_hour*60) + $tz_min)*60);
3397         ($sec, $min, $hour, $mday, $mon, $year, $wday, $yday) = gmtime($local);
3398         $date{'hour_local'} = $hour;
3399         $date{'minute_local'} = $min;
3400         $date{'tz_local'} = $tz;
3401         $date{'iso-tz'} = sprintf("%04d-%02d-%02d %02d:%02d:%02d %s",
3402                                   1900+$year, $mon+1, $mday,
3403                                   $hour, $min, $sec, $tz);
3404         return %date;
3405 }
3406
3407 sub parse_tag {
3408         my $tag_id = shift;
3409         my %tag;
3410         my @comment;
3411
3412         open my $fd, "-|", git_cmd(), "cat-file", "tag", $tag_id or return;
3413         $tag{'id'} = $tag_id;
3414         while (my $line = <$fd>) {
3415                 chomp $line;
3416                 if ($line =~ m/^object ([0-9a-fA-F]{40})$/) {
3417                         $tag{'object'} = $1;
3418                 } elsif ($line =~ m/^type (.+)$/) {
3419                         $tag{'type'} = $1;
3420                 } elsif ($line =~ m/^tag (.+)$/) {
3421                         $tag{'name'} = $1;
3422                 } elsif ($line =~ m/^tagger (.*) ([0-9]+) (.*)$/) {
3423                         $tag{'author'} = $1;
3424                         $tag{'author_epoch'} = $2;
3425                         $tag{'author_tz'} = $3;
3426                         if ($tag{'author'} =~ m/^([^<]+) <([^>]*)>/) {
3427                                 $tag{'author_name'}  = $1;
3428                                 $tag{'author_email'} = $2;
3429                         } else {
3430                                 $tag{'author_name'} = $tag{'author'};
3431                         }
3432                 } elsif ($line =~ m/--BEGIN/) {
3433                         push @comment, $line;
3434                         last;
3435                 } elsif ($line eq "") {
3436                         last;
3437                 }
3438         }
3439         push @comment, <$fd>;
3440         $tag{'comment'} = \@comment;
3441         close $fd or return;
3442         if (!defined $tag{'name'}) {
3443                 return
3444         };
3445         return %tag
3446 }
3447
3448 sub parse_commit_text {
3449         my ($commit_text, $withparents) = @_;
3450         my @commit_lines = split '\n', $commit_text;
3451         my %co;
3452
3453         pop @commit_lines; # Remove '\0'
3454
3455         if (! @commit_lines) {
3456                 return;
3457         }
3458
3459         my $header = shift @commit_lines;
3460         if ($header !~ m/^[0-9a-fA-F]{40}/) {
3461                 return;
3462         }
3463         ($co{'id'}, my @parents) = split ' ', $header;
3464         while (my $line = shift @commit_lines) {
3465                 last if $line eq "\n";
3466                 if ($line =~ m/^tree ([0-9a-fA-F]{40})$/) {
3467                         $co{'tree'} = $1;
3468                 } elsif ((!defined $withparents) && ($line =~ m/^parent ([0-9a-fA-F]{40})$/)) {
3469                         push @parents, $1;
3470                 } elsif ($line =~ m/^author (.*) ([0-9]+) (.*)$/) {
3471                         $co{'author'} = to_utf8($1);
3472                         $co{'author_epoch'} = $2;
3473                         $co{'author_tz'} = $3;
3474                         if ($co{'author'} =~ m/^([^<]+) <([^>]*)>/) {
3475                                 $co{'author_name'}  = $1;
3476                                 $co{'author_email'} = $2;
3477                         } else {
3478                                 $co{'author_name'} = $co{'author'};
3479                         }
3480                 } elsif ($line =~ m/^committer (.*) ([0-9]+) (.*)$/) {
3481                         $co{'committer'} = to_utf8($1);
3482                         $co{'committer_epoch'} = $2;
3483                         $co{'committer_tz'} = $3;
3484                         if ($co{'committer'} =~ m/^([^<]+) <([^>]*)>/) {
3485                                 $co{'committer_name'}  = $1;
3486                                 $co{'committer_email'} = $2;
3487                         } else {
3488                                 $co{'committer_name'} = $co{'committer'};
3489                         }
3490                 }
3491         }
3492         if (!defined $co{'tree'}) {
3493                 return;
3494         };
3495         $co{'parents'} = \@parents;
3496         $co{'parent'} = $parents[0];
3497
3498         foreach my $title (@commit_lines) {
3499                 $title =~ s/^    //;
3500                 if ($title ne "") {
3501                         $co{'title'} = chop_str($title, 80, 5);
3502                         # remove leading stuff of merges to make the interesting part visible
3503                         if (length($title) > 50) {
3504                                 $title =~ s/^Automatic //;
3505                                 $title =~ s/^merge (of|with) /Merge ... /i;
3506                                 if (length($title) > 50) {
3507                                         $title =~ s/(http|rsync):\/\///;
3508                                 }
3509                                 if (length($title) > 50) {
3510                                         $title =~ s/(master|www|rsync)\.//;
3511                                 }
3512                                 if (length($title) > 50) {
3513                                         $title =~ s/kernel.org:?//;
3514                                 }
3515                                 if (length($title) > 50) {
3516                                         $title =~ s/\/pub\/scm//;
3517                                 }
3518                         }
3519                         $co{'title_short'} = chop_str($title, 50, 5);
3520                         last;
3521                 }
3522         }
3523         if (! defined $co{'title'} || $co{'title'} eq "") {
3524                 $co{'title'} = $co{'title_short'} = '(no commit message)';
3525         }
3526         # remove added spaces
3527         foreach my $line (@commit_lines) {
3528                 $line =~ s/^    //;
3529         }
3530         $co{'comment'} = \@commit_lines;
3531
3532         my $age = time - $co{'committer_epoch'};
3533         $co{'age'} = $age;
3534         $co{'age_string'} = age_string($age);
3535         my ($sec, $min, $hour, $mday, $mon, $year, $wday, $yday) = gmtime($co{'committer_epoch'});
3536         if ($age > 60*60*24*7*2) {
3537                 $co{'age_string_date'} = sprintf "%4i-%02u-%02i", 1900 + $year, $mon+1, $mday;
3538                 $co{'age_string_age'} = $co{'age_string'};
3539         } else {
3540                 $co{'age_string_date'} = $co{'age_string'};
3541                 $co{'age_string_age'} = sprintf "%4i-%02u-%02i", 1900 + $year, $mon+1, $mday;
3542         }
3543         return %co;
3544 }
3545
3546 sub parse_commit {
3547         my ($commit_id) = @_;
3548         my %co;
3549
3550         local $/ = "\0";
3551
3552         open my $fd, "-|", git_cmd(), "rev-list",
3553                 "--parents",
3554                 "--header",
3555                 "--max-count=1",
3556                 $commit_id,
3557                 "--",
3558                 or die_error(500, "Open git-rev-list failed");
3559         %co = parse_commit_text(<$fd>, 1);
3560         close $fd;
3561
3562         return %co;
3563 }
3564
3565 sub parse_commits {
3566         my ($commit_id, $maxcount, $skip, $filename, @args) = @_;
3567         my @cos;
3568
3569         $maxcount ||= 1;
3570         $skip ||= 0;
3571
3572         local $/ = "\0";
3573
3574         open my $fd, "-|", git_cmd(), "rev-list",
3575                 "--header",
3576                 @args,
3577                 ("--max-count=" . $maxcount),
3578                 ("--skip=" . $skip),
3579                 @extra_options,
3580                 $commit_id,
3581                 "--",
3582                 ($filename ? ($filename) : ())
3583                 or die_error(500, "Open git-rev-list failed");
3584         while (my $line = <$fd>) {
3585                 my %co = parse_commit_text($line);
3586                 push @cos, \%co;
3587         }
3588         close $fd;
3589
3590         return wantarray ? @cos : \@cos;
3591 }
3592
3593 # parse line of git-diff-tree "raw" output
3594 sub parse_difftree_raw_line {
3595         my $line = shift;
3596         my %res;
3597
3598         # ':100644 100644 03b218260e99b78c6df0ed378e59ed9205ccc96d 3b93d5e7cc7f7dd4ebed13a5cc1a4ad976fc94d8 M   ls-files.c'
3599         # ':100644 100644 7f9281985086971d3877aca27704f2aaf9c448ce bc190ebc71bbd923f2b728e505408f5e54bd073a M   rev-tree.c'
3600         if ($line =~ m/^:([0-7]{6}) ([0-7]{6}) ([0-9a-fA-F]{40}) ([0-9a-fA-F]{40}) (.)([0-9]{0,3})\t(.*)$/) {
3601                 $res{'from_mode'} = $1;
3602                 $res{'to_mode'} = $2;
3603                 $res{'from_id'} = $3;
3604                 $res{'to_id'} = $4;
3605                 $res{'status'} = $5;
3606                 $res{'similarity'} = $6;
3607                 if ($res{'status'} eq 'R' || $res{'status'} eq 'C') { # renamed or copied
3608                         ($res{'from_file'}, $res{'to_file'}) = map { unquote($_) } split("\t", $7);
3609                 } else {
3610                         $res{'from_file'} = $res{'to_file'} = $res{'file'} = unquote($7);
3611                 }
3612         }
3613         # '::100755 100755 100755 60e79ca1b01bc8b057abe17ddab484699a7f5fdb 94067cc5f73388f33722d52ae02f44692bc07490 94067cc5f73388f33722d52ae02f44692bc07490 MR git-gui/git-gui.sh'
3614         # combined diff (for merge commit)
3615         elsif ($line =~ s/^(::+)((?:[0-7]{6} )+)((?:[0-9a-fA-F]{40} )+)([a-zA-Z]+)\t(.*)$//) {
3616                 $res{'nparents'}  = length($1);
3617                 $res{'from_mode'} = [ split(' ', $2) ];
3618                 $res{'to_mode'} = pop @{$res{'from_mode'}};
3619                 $res{'from_id'} = [ split(' ', $3) ];
3620                 $res{'to_id'} = pop @{$res{'from_id'}};
3621                 $res{'status'} = [ split('', $4) ];
3622                 $res{'to_file'} = unquote($5);
3623         }
3624         # 'c512b523472485aef4fff9e57b229d9d243c967f'
3625         elsif ($line =~ m/^([0-9a-fA-F]{40})$/) {
3626                 $res{'commit'} = $1;
3627         }
3628
3629         return wantarray ? %res : \%res;
3630 }
3631
3632 # wrapper: return parsed line of git-diff-tree "raw" output
3633 # (the argument might be raw line, or parsed info)
3634 sub parsed_difftree_line {
3635         my $line_or_ref = shift;
3636
3637         if (ref($line_or_ref) eq "HASH") {
3638                 # pre-parsed (or generated by hand)
3639                 return $line_or_ref;
3640         } else {
3641                 return parse_difftree_raw_line($line_or_ref);
3642         }
3643 }
3644
3645 # parse line of git-ls-tree output
3646 sub parse_ls_tree_line {
3647         my $line = shift;
3648         my %opts = @_;
3649         my %res;
3650
3651         if ($opts{'-l'}) {
3652                 #'100644 blob 0fa3f3a66fb6a137f6ec2c19351ed4d807070ffa   16717  panic.c'
3653                 $line =~ m/^([0-9]+) (.+) ([0-9a-fA-F]{40}) +(-|[0-9]+)\t(.+)$/s;
3654
3655                 $res{'mode'} = $1;
3656                 $res{'type'} = $2;
3657                 $res{'hash'} = $3;
3658                 $res{'size'} = $4;
3659                 if ($opts{'-z'}) {
3660                         $res{'name'} = $5;
3661                 } else {
3662                         $res{'name'} = unquote($5);
3663                 }
3664         } else {
3665                 #'100644 blob 0fa3f3a66fb6a137f6ec2c19351ed4d807070ffa  panic.c'
3666                 $line =~ m/^([0-9]+) (.+) ([0-9a-fA-F]{40})\t(.+)$/s;
3667
3668                 $res{'mode'} = $1;
3669                 $res{'type'} = $2;
3670                 $res{'hash'} = $3;
3671                 if ($opts{'-z'}) {
3672                         $res{'name'} = $4;
3673                 } else {
3674                         $res{'name'} = unquote($4);
3675                 }
3676         }
3677
3678         return wantarray ? %res : \%res;
3679 }
3680
3681 # generates _two_ hashes, references to which are passed as 2 and 3 argument
3682 sub parse_from_to_diffinfo {
3683         my ($diffinfo, $from, $to, @parents) = @_;
3684
3685         if ($diffinfo->{'nparents'}) {
3686                 # combined diff
3687                 $from->{'file'} = [];
3688                 $from->{'href'} = [];
3689                 fill_from_file_info($diffinfo, @parents)
3690                         unless exists $diffinfo->{'from_file'};
3691                 for (my $i = 0; $i < $diffinfo->{'nparents'}; $i++) {
3692                         $from->{'file'}[$i] =
3693                                 defined $diffinfo->{'from_file'}[$i] ?
3694                                         $diffinfo->{'from_file'}[$i] :
3695                                         $diffinfo->{'to_file'};
3696                         if ($diffinfo->{'status'}[$i] ne "A") { # not new (added) file
3697                                 $from->{'href'}[$i] = href(action=>"blob",
3698                                                            hash_base=>$parents[$i],
3699                                                            hash=>$diffinfo->{'from_id'}[$i],
3700                                                            file_name=>$from->{'file'}[$i]);
3701                         } else {
3702                                 $from->{'href'}[$i] = undef;
3703                         }
3704                 }
3705         } else {
3706                 # ordinary (not combined) diff
3707                 $from->{'file'} = $diffinfo->{'from_file'};
3708                 if ($diffinfo->{'status'} ne "A") { # not new (added) file
3709                         $from->{'href'} = href(action=>"blob", hash_base=>$hash_parent,
3710                                                hash=>$diffinfo->{'from_id'},
3711                                                file_name=>$from->{'file'});
3712                 } else {
3713                         delete $from->{'href'};
3714                 }
3715         }
3716
3717         $to->{'file'} = $diffinfo->{'to_file'};
3718         if (!is_deleted($diffinfo)) { # file exists in result
3719                 $to->{'href'} = href(action=>"blob", hash_base=>$hash,
3720                                      hash=>$diffinfo->{'to_id'},
3721                                      file_name=>$to->{'file'});
3722         } else {
3723                 delete $to->{'href'};
3724         }
3725 }
3726
3727 ## ......................................................................
3728 ## parse to array of hashes functions
3729
3730 sub git_get_heads_list {
3731         my ($limit, @classes) = @_;
3732         @classes = get_branch_refs() unless @classes;
3733         my @patterns = map { "refs/$_" } @classes;
3734         my @headslist;
3735
3736         open my $fd, '-|', git_cmd(), 'for-each-ref',
3737                 ($limit ? '--count='.($limit+1) : ()), '--sort=-committerdate',
3738                 '--format=%(objectname) %(refname) %(subject)%00%(committer)',
3739                 @patterns
3740                 or return;
3741         while (my $line = <$fd>) {
3742                 my %ref_item;
3743
3744                 chomp $line;
3745                 my ($refinfo, $committerinfo) = split(/\0/, $line);
3746                 my ($hash, $name, $title) = split(' ', $refinfo, 3);
3747                 my ($committer, $epoch, $tz) =
3748                         ($committerinfo =~ /^(.*) ([0-9]+) (.*)$/);
3749                 $ref_item{'fullname'}  = $name;
3750                 my $strip_refs = join '|', map { quotemeta } get_branch_refs();
3751                 $name =~ s!^refs/($strip_refs|remotes)/!!;
3752                 $ref_item{'name'} = $name;
3753                 # for refs neither in 'heads' nor 'remotes' we want to
3754                 # show their ref dir
3755                 my $ref_dir = (defined $1) ? $1 : '';
3756                 if ($ref_dir ne '' and $ref_dir ne 'heads' and $ref_dir ne 'remotes') {
3757                     $ref_item{'name'} .= ' (' . $ref_dir . ')';
3758                 }
3759
3760                 $ref_item{'id'}    = $hash;
3761                 $ref_item{'title'} = $title || '(no commit message)';
3762                 $ref_item{'epoch'} = $epoch;
3763                 if ($epoch) {
3764                         $ref_item{'age'} = age_string(time - $ref_item{'epoch'});
3765                 } else {
3766                         $ref_item{'age'} = "unknown";
3767                 }
3768
3769                 push @headslist, \%ref_item;
3770         }
3771         close $fd;
3772
3773         return wantarray ? @headslist : \@headslist;
3774 }
3775
3776 sub git_get_tags_list {
3777         my $limit = shift;
3778         my @tagslist;
3779
3780         open my $fd, '-|', git_cmd(), 'for-each-ref',
3781                 ($limit ? '--count='.($limit+1) : ()), '--sort=-creatordate',
3782                 '--format=%(objectname) %(objecttype) %(refname) '.
3783                 '%(*objectname) %(*objecttype) %(subject)%00%(creator)',
3784                 'refs/tags'
3785                 or return;
3786         while (my $line = <$fd>) {
3787                 my %ref_item;
3788
3789                 chomp $line;
3790                 my ($refinfo, $creatorinfo) = split(/\0/, $line);
3791                 my ($id, $type, $name, $refid, $reftype, $title) = split(' ', $refinfo, 6);
3792                 my ($creator, $epoch, $tz) =
3793                         ($creatorinfo =~ /^(.*) ([0-9]+) (.*)$/);
3794                 $ref_item{'fullname'} = $name;
3795                 $name =~ s!^refs/tags/!!;
3796
3797                 $ref_item{'type'} = $type;
3798                 $ref_item{'id'} = $id;
3799                 $ref_item{'name'} = $name;
3800                 if ($type eq "tag") {
3801                         $ref_item{'subject'} = $title;
3802                         $ref_item{'reftype'} = $reftype;
3803                         $ref_item{'refid'}   = $refid;
3804                 } else {
3805                         $ref_item{'reftype'} = $type;
3806                         $ref_item{'refid'}   = $id;
3807                 }
3808
3809                 if ($type eq "tag" || $type eq "commit") {
3810                         $ref_item{'epoch'} = $epoch;
3811                         if ($epoch) {
3812                                 $ref_item{'age'} = age_string(time - $ref_item{'epoch'});
3813                         } else {
3814                                 $ref_item{'age'} = "unknown";
3815                         }
3816                 }
3817
3818                 push @tagslist, \%ref_item;
3819         }
3820         close $fd;
3821
3822         return wantarray ? @tagslist : \@tagslist;
3823 }
3824
3825 ## ----------------------------------------------------------------------
3826 ## filesystem-related functions
3827
3828 sub get_file_owner {
3829         my $path = shift;
3830
3831         my ($dev, $ino, $mode, $nlink, $st_uid, $st_gid, $rdev, $size) = stat($path);
3832         my ($name, $passwd, $uid, $gid, $quota, $comment, $gcos, $dir, $shell) = getpwuid($st_uid);
3833         if (!defined $gcos) {
3834                 return undef;
3835         }
3836         my $owner = $gcos;
3837         $owner =~ s/[,;].*$//;
3838         return to_utf8($owner);
3839 }
3840
3841 # assume that file exists
3842 sub insert_file {
3843         my $filename = shift;
3844
3845         open my $fd, '<', $filename;
3846         print map { to_utf8($_) } <$fd>;
3847         close $fd;
3848 }
3849
3850 ## ......................................................................
3851 ## mimetype related functions
3852
3853 sub mimetype_guess_file {
3854         my $filename = shift;
3855         my $mimemap = shift;
3856         -r $mimemap or return undef;
3857
3858         my %mimemap;
3859         open(my $mh, '<', $mimemap) or return undef;
3860         while (<$mh>) {
3861                 next if m/^#/; # skip comments
3862                 my ($mimetype, @exts) = split(/\s+/);
3863                 foreach my $ext (@exts) {
3864                         $mimemap{$ext} = $mimetype;
3865                 }
3866         }
3867         close($mh);
3868
3869         $filename =~ /\.([^.]*)$/;
3870         return $mimemap{$1};
3871 }
3872
3873 sub mimetype_guess {
3874         my $filename = shift;
3875         my $mime;
3876         $filename =~ /\./ or return undef;
3877
3878         if ($mimetypes_file) {
3879                 my $file = $mimetypes_file;
3880                 if ($file !~ m!^/!) { # if it is relative path
3881                         # it is relative to project
3882                         $file = "$projectroot/$project/$file";
3883                 }
3884                 $mime = mimetype_guess_file($filename, $file);
3885         }
3886         $mime ||= mimetype_guess_file($filename, '/etc/mime.types');
3887         return $mime;
3888 }
3889
3890 sub blob_mimetype {
3891         my $fd = shift;
3892         my $filename = shift;
3893
3894         if ($filename) {
3895                 my $mime = mimetype_guess($filename);
3896                 $mime and return $mime;
3897         }
3898
3899         # just in case
3900         return $default_blob_plain_mimetype unless $fd;
3901
3902         if (-T $fd) {
3903                 return 'text/plain';
3904         } elsif (! $filename) {
3905                 return 'application/octet-stream';
3906         } elsif ($filename =~ m/\.png$/i) {
3907                 return 'image/png';
3908         } elsif ($filename =~ m/\.gif$/i) {
3909                 return 'image/gif';
3910         } elsif ($filename =~ m/\.jpe?g$/i) {
3911                 return 'image/jpeg';
3912         } else {
3913                 return 'application/octet-stream';
3914         }
3915 }
3916
3917 sub blob_contenttype {
3918         my ($fd, $file_name, $type) = @_;
3919
3920         $type ||= blob_mimetype($fd, $file_name);
3921         if ($type eq 'text/plain' && defined $default_text_plain_charset) {
3922                 $type .= "; charset=$default_text_plain_charset";
3923         }
3924
3925         return $type;
3926 }
3927
3928 # guess file syntax for syntax highlighting; return undef if no highlighting
3929 # the name of syntax can (in the future) depend on syntax highlighter used
3930 sub guess_file_syntax {
3931         my ($highlight, $mimetype, $file_name) = @_;
3932         return undef unless ($highlight && defined $file_name);
3933         my $basename = basename($file_name, '.in');
3934         return $highlight_basename{$basename}
3935                 if exists $highlight_basename{$basename};
3936
3937         $basename =~ /\.([^.]*)$/;
3938         my $ext = $1 or return undef;
3939         return $highlight_ext{$ext}
3940                 if exists $highlight_ext{$ext};
3941
3942         return undef;
3943 }
3944
3945 # run highlighter and return FD of its output,
3946 # or return original FD if no highlighting
3947 sub run_highlighter {
3948         my ($fd, $highlight, $syntax) = @_;
3949         return $fd unless ($highlight && defined $syntax);
3950
3951         close $fd;
3952         open $fd, quote_command(git_cmd(), "cat-file", "blob", $hash)." | ".
3953                   quote_command($highlight_bin).
3954                   " --replace-tabs=8 --fragment --syntax $syntax |"
3955                 or die_error(500, "Couldn't open file or run syntax highlighter");
3956         return $fd;
3957 }
3958
3959 ## ======================================================================
3960 ## functions printing HTML: header, footer, error page
3961
3962 sub get_page_title {
3963         my $title = to_utf8($site_name);
3964
3965         unless (defined $project) {
3966                 if (defined $project_filter) {
3967                         $title .= " - projects in '" . esc_path($project_filter) . "'";
3968                 }
3969                 return $title;
3970         }
3971         $title .= " - " . to_utf8($project);
3972
3973         return $title unless (defined $action);
3974         $title .= "/$action"; # $action is US-ASCII (7bit ASCII)
3975
3976         return $title unless (defined $file_name);
3977         $title .= " - " . esc_path($file_name);
3978         if ($action eq "tree" && $file_name !~ m|/$|) {
3979                 $title .= "/";
3980         }
3981
3982         return $title;
3983 }
3984
3985 sub get_content_type_html {
3986         # require explicit support from the UA if we are to send the page as
3987         # 'application/xhtml+xml', otherwise send it as plain old 'text/html'.
3988         # we have to do this because MSIE sometimes globs '*/*', pretending to
3989         # support xhtml+xml but choking when it gets what it asked for.
3990         if (defined $cgi->http('HTTP_ACCEPT') &&
3991             $cgi->http('HTTP_ACCEPT') =~ m/(,|;|\s|^)application\/xhtml\+xml(,|;|\s|$)/ &&
3992             $cgi->Accept('application/xhtml+xml') != 0) {
3993                 return 'application/xhtml+xml';
3994         } else {
3995                 return 'text/html';
3996         }
3997 }
3998
3999 sub print_feed_meta {
4000         if (defined $project) {
4001                 my %href_params = get_feed_info();
4002                 if (!exists $href_params{'-title'}) {
4003                         $href_params{'-title'} = 'log';
4004                 }
4005
4006                 foreach my $format (qw(RSS Atom)) {
4007                         my $type = lc($format);
4008                         my %link_attr = (
4009                                 '-rel' => 'alternate',
4010                                 '-title' => esc_attr("$project - $href_params{'-title'} - $format feed"),
4011                                 '-type' => "application/$type+xml"
4012                         );
4013
4014                         $href_params{'extra_options'} = undef;
4015                         $href_params{'action'} = $type;
4016                         $link_attr{'-href'} = href(%href_params);
4017                         print "<link ".
4018                               "rel=\"$link_attr{'-rel'}\" ".
4019                               "title=\"$link_attr{'-title'}\" ".
4020                               "href=\"$link_attr{'-href'}\" ".
4021                               "type=\"$link_attr{'-type'}\" ".
4022                               "/>\n";
4023
4024                         $href_params{'extra_options'} = '--no-merges';
4025                         $link_attr{'-href'} = href(%href_params);
4026                         $link_attr{'-title'} .= ' (no merges)';
4027                         print "<link ".
4028                               "rel=\"$link_attr{'-rel'}\" ".
4029                               "title=\"$link_attr{'-title'}\" ".
4030                               "href=\"$link_attr{'-href'}\" ".
4031                               "type=\"$link_attr{'-type'}\" ".
4032                               "/>\n";
4033                 }
4034
4035         } else {
4036                 printf('<link rel="alternate" title="%s projects list" '.
4037                        'href="%s" type="text/plain; charset=utf-8" />'."\n",
4038                        esc_attr($site_name), href(project=>undef, action=>"project_index"));
4039                 printf('<link rel="alternate" title="%s projects feeds" '.
4040                        'href="%s" type="text/x-opml" />'."\n",
4041                        esc_attr($site_name), href(project=>undef, action=>"opml"));
4042         }
4043 }
4044
4045 sub print_header_links {
4046         my $status = shift;
4047
4048         # print out each stylesheet that exist, providing backwards capability
4049         # for those people who defined $stylesheet in a config file
4050         if (defined $stylesheet) {
4051                 print '<link rel="stylesheet" type="text/css" href="'.esc_url($stylesheet).'"/>'."\n";
4052         } else {
4053                 foreach my $stylesheet (@stylesheets) {
4054                         next unless $stylesheet;
4055                         print '<link rel="stylesheet" type="text/css" href="'.esc_url($stylesheet).'"/>'."\n";
4056                 }
4057         }
4058         print_feed_meta()
4059                 if ($status eq '200 OK');
4060         if (defined $favicon) {
4061                 print qq(<link rel="shortcut icon" href=").esc_url($favicon).qq(" type="image/png" />\n);
4062         }
4063 }
4064
4065 sub print_nav_breadcrumbs_path {
4066         my $dirprefix = undef;
4067         while (my $part = shift) {
4068                 $dirprefix .= "/" if defined $dirprefix;
4069                 $dirprefix .= $part;
4070                 print $cgi->a({-href => href(project => undef,
4071                                              project_filter => $dirprefix,
4072                                              action => "project_list")},
4073                               esc_html($part)) . " / ";
4074         }
4075 }
4076
4077 sub print_nav_breadcrumbs {
4078         my %opts = @_;
4079
4080         for my $crumb (@extra_breadcrumbs, [ $home_link_str => $home_link ]) {
4081                 print $cgi->a({-href => esc_url($crumb->[1])}, $crumb->[0]) . " / ";
4082         }
4083         if (defined $project) {
4084                 my @dirname = split '/', $project;
4085                 my $projectbasename = pop @dirname;
4086                 print_nav_breadcrumbs_path(@dirname);
4087                 print $cgi->a({-href => href(action=>"summary")}, esc_html($projectbasename));
4088                 if (defined $action) {
4089                         my $action_print = $action ;
4090                         if (defined $opts{-action_extra}) {
4091                                 $action_print = $cgi->a({-href => href(action=>$action)},
4092                                         $action);
4093                         }
4094                         print " / $action_print";
4095                 }
4096                 if (defined $opts{-action_extra}) {
4097                         print " / $opts{-action_extra}";
4098                 }
4099                 print "\n";
4100         } elsif (defined $project_filter) {
4101                 print_nav_breadcrumbs_path(split '/', $project_filter);
4102         }
4103 }
4104
4105 sub print_search_form {
4106         if (!defined $searchtext) {
4107                 $searchtext = "";
4108         }
4109         my $search_hash;
4110         if (defined $hash_base) {
4111                 $search_hash = $hash_base;
4112         } elsif (defined $hash) {
4113                 $search_hash = $hash;
4114         } else {
4115                 $search_hash = "HEAD";
4116         }
4117         my $action = $my_uri;
4118         my $use_pathinfo = gitweb_check_feature('pathinfo');
4119         if ($use_pathinfo) {
4120                 $action .= "/".esc_url($project);
4121         }
4122         print $cgi->start_form(-method => "get", -action => $action) .
4123               "<div class=\"search\">\n" .
4124               (!$use_pathinfo &&
4125               $cgi->input({-name=>"p", -value=>$project, -type=>"hidden"}) . "\n") .
4126               $cgi->input({-name=>"a", -value=>"search", -type=>"hidden"}) . "\n" .
4127               $cgi->input({-name=>"h", -value=>$search_hash, -type=>"hidden"}) . "\n" .
4128               $cgi->popup_menu(-name => 'st', -default => 'commit',
4129                                -values => ['commit', 'grep', 'author', 'committer', 'pickaxe']) .
4130               " " . $cgi->a({-href => href(action=>"search_help"),
4131                              -title => "search help" }, "?") . " search:\n",
4132               $cgi->textfield(-name => "s", -value => $searchtext, -override => 1) . "\n" .
4133               "<span title=\"Extended regular expression\">" .
4134               $cgi->checkbox(-name => 'sr', -value => 1, -label => 're',
4135                              -checked => $search_use_regexp) .
4136               "</span>" .
4137               "</div>" .
4138               $cgi->end_form() . "\n";
4139 }
4140
4141 sub git_header_html {
4142         my $status = shift || "200 OK";
4143         my $expires = shift;
4144         my %opts = @_;
4145
4146         my $title = get_page_title();
4147         my $content_type = get_content_type_html();
4148         print $cgi->header(-type=>$content_type, -charset => 'utf-8',
4149                            -status=> $status, -expires => $expires)
4150                 unless ($opts{'-no_http_header'});
4151         my $mod_perl_version = $ENV{'MOD_PERL'} ? " $ENV{'MOD_PERL'}" : '';
4152         print <<EOF;
4153 <?xml version="1.0" encoding="utf-8"?>
4154 <!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Strict//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-strict.dtd">
4155 <html xmlns="http://www.w3.org/1999/xhtml" xml:lang="en-US" lang="en-US">
4156 <!-- git web interface version $version, (C) 2005-2006, Kay Sievers <kay.sievers\@vrfy.org>, Christian Gierke -->
4157 <!-- git core binaries version $git_version -->
4158 <head>
4159 <meta http-equiv="content-type" content="$content_type; charset=utf-8"/>
4160 <meta name="generator" content="gitweb/$version git/$git_version$mod_perl_version"/>
4161 <meta name="robots" content="index, nofollow"/>
4162 <title>$title</title>
4163 EOF
4164         # the stylesheet, favicon etc urls won't work correctly with path_info
4165         # unless we set the appropriate base URL
4166         if ($ENV{'PATH_INFO'}) {
4167                 print "<base href=\"".esc_url($base_url)."\" />\n";
4168         }
4169         print_header_links($status);
4170
4171         if (defined $site_html_head_string) {
4172                 print to_utf8($site_html_head_string);
4173         }
4174
4175         print "</head>\n" .
4176               "<body>\n";
4177
4178         if (defined $site_header && -f $site_header) {
4179                 insert_file($site_header);
4180         }
4181
4182         print "<div class=\"page_header\">\n";
4183         if (defined $logo) {
4184                 print $cgi->a({-href => esc_url($logo_url),
4185                                -title => $logo_label},
4186                               $cgi->img({-src => esc_url($logo),
4187                                          -width => 72, -height => 27,
4188                                          -alt => "git",
4189                                          -class => "logo"}));
4190         }
4191         print_nav_breadcrumbs(%opts);
4192         print "</div>\n";
4193
4194         my $have_search = gitweb_check_feature('search');
4195         if (defined $project && $have_search) {
4196                 print_search_form();
4197         }
4198 }
4199
4200 sub git_footer_html {
4201         my $feed_class = 'rss_logo';
4202
4203         print "<div class=\"page_footer\">\n";
4204         if (defined $project) {
4205                 my $descr = git_get_project_description($project);
4206                 if (defined $descr) {
4207                         print "<div class=\"page_footer_text\">" . esc_html($descr) . "</div>\n";
4208                 }
4209
4210                 my %href_params = get_feed_info();
4211                 if (!%href_params) {
4212                         $feed_class .= ' generic';
4213                 }
4214                 $href_params{'-title'} ||= 'log';
4215
4216                 foreach my $format (qw(RSS Atom)) {
4217                         $href_params{'action'} = lc($format);
4218                         print $cgi->a({-href => href(%href_params),
4219                                       -title => "$href_params{'-title'} $format feed",
4220                                       -class => $feed_class}, $format)."\n";
4221                 }
4222
4223         } else {
4224                 print $cgi->a({-href => href(project=>undef, action=>"opml",
4225                                              project_filter => $project_filter),
4226                               -class => $feed_class}, "OPML") . " ";
4227                 print $cgi->a({-href => href(project=>undef, action=>"project_index",
4228                                              project_filter => $project_filter),
4229                               -class => $feed_class}, "TXT") . "\n";
4230         }
4231         print "</div>\n"; # class="page_footer"
4232
4233         if (defined $t0 && gitweb_check_feature('timed')) {
4234                 print "<div id=\"generating_info\">\n";
4235                 print 'This page took '.
4236                       '<span id="generating_time" class="time_span">'.
4237                       tv_interval($t0, [ gettimeofday() ]).
4238                       ' seconds </span>'.
4239                       ' and '.
4240                       '<span id="generating_cmd">'.
4241                       $number_of_git_cmds.
4242                       '</span> git commands '.
4243                       " to generate.\n";
4244                 print "</div>\n"; # class="page_footer"
4245         }
4246
4247         if (defined $site_footer && -f $site_footer) {
4248                 insert_file($site_footer);
4249         }
4250
4251         print qq!<script type="text/javascript" src="!.esc_url($javascript).qq!"></script>\n!;
4252         if (defined $action &&
4253             $action eq 'blame_incremental') {
4254                 print qq!<script type="text/javascript">\n!.
4255                       qq!startBlame("!. href(action=>"blame_data", -replay=>1) .qq!",\n!.
4256                       qq!           "!. href() .qq!");\n!.
4257                       qq!</script>\n!;
4258         } else {
4259                 my ($jstimezone, $tz_cookie, $datetime_class) =
4260                         gitweb_get_feature('javascript-timezone');
4261
4262                 print qq!<script type="text/javascript">\n!.
4263                       qq!window.onload = function () {\n!;
4264                 if (gitweb_check_feature('javascript-actions')) {
4265                         print qq!       fixLinks();\n!;
4266                 }
4267                 if ($jstimezone && $tz_cookie && $datetime_class) {
4268                         print qq!       var tz_cookie = { name: '$tz_cookie', expires: 14, path: '/' };\n!. # in days
4269                               qq!       onloadTZSetup('$jstimezone', tz_cookie, '$datetime_class');\n!;
4270                 }
4271                 print qq!};\n!.
4272                       qq!</script>\n!;
4273         }
4274
4275         print "</body>\n" .
4276               "</html>";
4277 }
4278
4279 # die_error(<http_status_code>, <error_message>[, <detailed_html_description>])
4280 # Example: die_error(404, 'Hash not found')
4281 # By convention, use the following status codes (as defined in RFC 2616):
4282 # 400: Invalid or missing CGI parameters, or
4283 #      requested object exists but has wrong type.
4284 # 403: Requested feature (like "pickaxe" or "snapshot") not enabled on
4285 #      this server or project.
4286 # 404: Requested object/revision/project doesn't exist.
4287 # 500: The server isn't configured properly, or
4288 #      an internal error occurred (e.g. failed assertions caused by bugs), or
4289 #      an unknown error occurred (e.g. the git binary died unexpectedly).
4290 # 503: The server is currently unavailable (because it is overloaded,
4291 #      or down for maintenance).  Generally, this is a temporary state.
4292 sub die_error {
4293         my $status = shift || 500;
4294         my $error = esc_html(shift) || "Internal Server Error";
4295         my $extra = shift;
4296         my %opts = @_;
4297
4298         my %http_responses = (
4299                 400 => '400 Bad Request',
4300                 403 => '403 Forbidden',
4301                 404 => '404 Not Found',
4302                 500 => '500 Internal Server Error',
4303                 503 => '503 Service Unavailable',
4304         );
4305         git_header_html($http_responses{$status}, undef, %opts);
4306         print <<EOF;
4307 <div class="page_body">
4308 <br /><br />
4309 $status - $error
4310 <br />
4311 EOF
4312         if (defined $extra) {
4313                 print "<hr />\n" .
4314                       "$extra\n";
4315         }
4316         print "</div>\n";
4317
4318         git_footer_html();
4319         goto DONE_GITWEB
4320                 unless ($opts{'-error_handler'});
4321 }
4322
4323 ## ----------------------------------------------------------------------
4324 ## functions printing or outputting HTML: navigation
4325
4326 sub git_print_page_nav {
4327         my ($current, $suppress, $head, $treehead, $treebase, $extra) = @_;
4328         $extra = '' if !defined $extra; # pager or formats
4329
4330         my @navs = qw(summary shortlog log commit commitdiff tree);
4331         if ($suppress) {
4332                 @navs = grep { $_ ne $suppress } @navs;
4333         }
4334
4335         my %arg = map { $_ => {action=>$_} } @navs;
4336         if (defined $head) {
4337                 for (qw(commit commitdiff)) {
4338                         $arg{$_}{'hash'} = $head;
4339                 }
4340                 if ($current =~ m/^(tree | log | shortlog | commit | commitdiff | search)$/x) {
4341                         for (qw(shortlog log)) {
4342                                 $arg{$_}{'hash'} = $head;
4343                         }
4344                 }
4345         }
4346
4347         $arg{'tree'}{'hash'} = $treehead if defined $treehead;
4348         $arg{'tree'}{'hash_base'} = $treebase if defined $treebase;
4349
4350         my @actions = gitweb_get_feature('actions');
4351         my %repl = (
4352                 '%' => '%',
4353                 'n' => $project,         # project name
4354                 'f' => $git_dir,         # project path within filesystem
4355                 'h' => $treehead || '',  # current hash ('h' parameter)
4356                 'b' => $treebase || '',  # hash base ('hb' parameter)
4357         );
4358         while (@actions) {
4359                 my ($label, $link, $pos) = splice(@actions,0,3);
4360                 # insert
4361                 @navs = map { $_ eq $pos ? ($_, $label) : $_ } @navs;
4362                 # munch munch
4363                 $link =~ s/%([%nfhb])/$repl{$1}/g;
4364                 $arg{$label}{'_href'} = $link;
4365         }
4366
4367         print "<div class=\"page_nav\">\n" .
4368                 (join " | ",
4369                  map { $_ eq $current ?
4370                        $_ : $cgi->a({-href => ($arg{$_}{_href} ? $arg{$_}{_href} : href(%{$arg{$_}}))}, "$_")
4371                  } @navs);
4372         print "<br/>\n$extra<br/>\n" .
4373               "</div>\n";
4374 }
4375
4376 # returns a submenu for the nagivation of the refs views (tags, heads,
4377 # remotes) with the current view disabled and the remotes view only
4378 # available if the feature is enabled
4379 sub format_ref_views {
4380         my ($current) = @_;
4381         my @ref_views = qw{tags heads};
4382         push @ref_views, 'remotes' if gitweb_check_feature('remote_heads');
4383         return join " | ", map {
4384                 $_ eq $current ? $_ :
4385                 $cgi->a({-href => href(action=>$_)}, $_)
4386         } @ref_views
4387 }
4388
4389 sub format_paging_nav {
4390         my ($action, $page, $has_next_link) = @_;
4391         my $paging_nav;
4392
4393
4394         if ($page > 0) {
4395                 $paging_nav .=
4396                         $cgi->a({-href => href(-replay=>1, page=>undef)}, "first") .
4397                         " &sdot; " .
4398                         $cgi->a({-href => href(-replay=>1, page=>$page-1),
4399                                  -accesskey => "p", -title => "Alt-p"}, "prev");
4400         } else {
4401                 $paging_nav .= "first &sdot; prev";
4402         }
4403
4404         if ($has_next_link) {
4405                 $paging_nav .= " &sdot; " .
4406                         $cgi->a({-href => href(-replay=>1, page=>$page+1),
4407                                  -accesskey => "n", -title => "Alt-n"}, "next");
4408         } else {
4409                 $paging_nav .= " &sdot; next";
4410         }
4411
4412         return $paging_nav;
4413 }
4414
4415 ## ......................................................................
4416 ## functions printing or outputting HTML: div
4417
4418 sub git_print_header_div {
4419         my ($action, $title, $hash, $hash_base) = @_;
4420         my %args = ();
4421
4422         $args{'action'} = $action;
4423         $args{'hash'} = $hash if $hash;
4424         $args{'hash_base'} = $hash_base if $hash_base;
4425
4426         print "<div class=\"header\">\n" .
4427               $cgi->a({-href => href(%args), -class => "title"},
4428               $title ? $title : $action) .
4429               "\n</div>\n";
4430 }
4431
4432 sub format_repo_url {
4433         my ($name, $url) = @_;
4434         return "<tr class=\"metadata_url\"><td>$name</td><td>$url</td></tr>\n";
4435 }
4436
4437 # Group output by placing it in a DIV element and adding a header.
4438 # Options for start_div() can be provided by passing a hash reference as the
4439 # first parameter to the function.
4440 # Options to git_print_header_div() can be provided by passing an array
4441 # reference. This must follow the options to start_div if they are present.
4442 # The content can be a scalar, which is output as-is, a scalar reference, which
4443 # is output after html escaping, an IO handle passed either as *handle or
4444 # *handle{IO}, or a function reference. In the latter case all following
4445 # parameters will be taken as argument to the content function call.
4446 sub git_print_section {
4447         my ($div_args, $header_args, $content);
4448         my $arg = shift;
4449         if (ref($arg) eq 'HASH') {
4450                 $div_args = $arg;
4451                 $arg = shift;
4452         }
4453         if (ref($arg) eq 'ARRAY') {
4454                 $header_args = $arg;
4455                 $arg = shift;
4456         }
4457         $content = $arg;
4458
4459         print $cgi->start_div($div_args);
4460         git_print_header_div(@$header_args);
4461
4462         if (ref($content) eq 'CODE') {
4463                 $content->(@_);
4464         } elsif (ref($content) eq 'SCALAR') {
4465                 print esc_html($$content);
4466         } elsif (ref($content) eq 'GLOB' or ref($content) eq 'IO::Handle') {
4467                 print <$content>;
4468         } elsif (!ref($content) && defined($content)) {
4469                 print $content;
4470         }
4471
4472         print $cgi->end_div;
4473 }
4474
4475 sub format_timestamp_html {
4476         my $date = shift;
4477         my $strtime = $date->{'rfc2822'};
4478
4479         my (undef, undef, $datetime_class) =
4480                 gitweb_get_feature('javascript-timezone');
4481         if ($datetime_class) {
4482                 $strtime = qq!<span class="$datetime_class">$strtime</span>!;
4483         }
4484
4485         my $localtime_format = '(%02d:%02d %s)';
4486         if ($date->{'hour_local'} < 6) {
4487                 $localtime_format = '(<span class="atnight">%02d:%02d</span> %s)';
4488         }
4489         $strtime .= ' ' .
4490                     sprintf($localtime_format,
4491                             $date->{'hour_local'}, $date->{'minute_local'}, $date->{'tz_local'});
4492
4493         return $strtime;
4494 }
4495
4496 # Outputs the author name and date in long form
4497 sub git_print_authorship {
4498         my $co = shift;
4499         my %opts = @_;
4500         my $tag = $opts{-tag} || 'div';
4501         my $author = $co->{'author_name'};
4502
4503         my %ad = parse_date($co->{'author_epoch'}, $co->{'author_tz'});
4504         print "<$tag class=\"author_date\">" .
4505               format_search_author($author, "author", esc_html($author)) .
4506               " [".format_timestamp_html(\%ad)."]".
4507               git_get_avatar($co->{'author_email'}, -pad_before => 1) .
4508               "</$tag>\n";
4509 }
4510
4511 # Outputs table rows containing the full author or committer information,
4512 # in the format expected for 'commit' view (& similar).
4513 # Parameters are a commit hash reference, followed by the list of people
4514 # to output information for. If the list is empty it defaults to both
4515 # author and committer.
4516 sub git_print_authorship_rows {
4517         my $co = shift;
4518         # too bad we can't use @people = @_ || ('author', 'committer')
4519         my @people = @_;
4520         @people = ('author', 'committer') unless @people;
4521         foreach my $who (@people) {
4522                 my %wd = parse_date($co->{"${who}_epoch"}, $co->{"${who}_tz"});
4523                 print "<tr><td>$who</td><td>" .
4524                       format_search_author($co->{"${who}_name"}, $who,
4525                                            esc_html($co->{"${who}_name"})) . " " .
4526                       format_search_author($co->{"${who}_email"}, $who,
4527                                            esc_html("<" . $co->{"${who}_email"} . ">")) .
4528                       "</td><td rowspan=\"2\">" .
4529                       git_get_avatar($co->{"${who}_email"}, -size => 'double') .
4530                       "</td></tr>\n" .
4531                       "<tr>" .
4532                       "<td></td><td>" .
4533                       format_timestamp_html(\%wd) .
4534                       "</td>" .
4535                       "</tr>\n";
4536         }
4537 }
4538
4539 sub git_print_page_path {
4540         my $name = shift;
4541         my $type = shift;
4542         my $hb = shift;
4543
4544
4545         print "<div class=\"page_path\">";
4546         print $cgi->a({-href => href(action=>"tree", hash_base=>$hb),
4547                       -title => 'tree root'}, to_utf8("[$project]"));
4548         print " / ";
4549         if (defined $name) {
4550                 my @dirname = split '/', $name;
4551                 my $basename = pop @dirname;
4552                 my $fullname = '';
4553
4554                 foreach my $dir (@dirname) {
4555                         $fullname .= ($fullname ? '/' : '') . $dir;
4556                         print $cgi->a({-href => href(action=>"tree", file_name=>$fullname,
4557                                                      hash_base=>$hb),
4558                                       -title => $fullname}, esc_path($dir));
4559                         print " / ";
4560                 }
4561                 if (defined $type && $type eq 'blob') {
4562                         print $cgi->a({-href => href(action=>"blob_plain", file_name=>$file_name,
4563                                                      hash_base=>$hb),
4564                                       -title => $name}, esc_path($basename));
4565                 } elsif (defined $type && $type eq 'tree') {
4566                         print $cgi->a({-href => href(action=>"tree", file_name=>$file_name,
4567                                                      hash_base=>$hb),
4568                                       -title => $name}, esc_path($basename));
4569                         print " / ";
4570                 } else {
4571                         print esc_path($basename);
4572                 }
4573         }
4574         print "<br/></div>\n";
4575 }
4576
4577 sub git_print_log {
4578         my $log = shift;
4579         my %opts = @_;
4580
4581         if ($opts{'-remove_title'}) {
4582                 # remove title, i.e. first line of log
4583                 shift @$log;
4584         }
4585         # remove leading empty lines
4586         while (defined $log->[0] && $log->[0] eq "") {
4587                 shift @$log;
4588         }
4589
4590         # print log
4591         my $skip_blank_line = 0;
4592         foreach my $line (@$log) {
4593                 if ($line =~ m/^\s*([A-Z][-A-Za-z]*-[Bb]y|C[Cc]): /) {
4594                         if (! $opts{'-remove_signoff'}) {
4595                                 print "<span class=\"signoff\">" . esc_html($line) . "</span><br/>\n";
4596                                 $skip_blank_line = 1;
4597                         }
4598                         next;
4599                 }
4600
4601                 if ($line =~ m,\s*([a-z]*link): (https?://\S+),i) {
4602                         if (! $opts{'-remove_signoff'}) {
4603                                 print "<span class=\"signoff\">" . esc_html($1) . ": " .
4604                                         "<a href=\"" . esc_html($2) . "\">" . esc_html($2) . "</a>" .
4605                                         "</span><br/>\n";
4606                                 $skip_blank_line = 1;
4607                         }
4608                         next;
4609                 }
4610
4611                 # print only one empty line
4612                 # do not print empty line after signoff
4613                 if ($line eq "") {
4614                         next if ($skip_blank_line);
4615                         $skip_blank_line = 1;
4616                 } else {
4617                         $skip_blank_line = 0;
4618                 }
4619
4620                 print format_log_line_html($line) . "<br/>\n";
4621         }
4622
4623         if ($opts{'-final_empty_line'}) {
4624                 # end with single empty line
4625                 print "<br/>\n" unless $skip_blank_line;
4626         }
4627 }
4628
4629 # return link target (what link points to)
4630 sub git_get_link_target {
4631         my $hash = shift;
4632         my $link_target;
4633
4634         # read link
4635         open my $fd, "-|", git_cmd(), "cat-file", "blob", $hash
4636                 or return;
4637         {
4638                 local $/ = undef;
4639                 $link_target = <$fd>;
4640         }
4641         close $fd
4642                 or return;
4643
4644         return $link_target;
4645 }
4646
4647 # given link target, and the directory (basedir) the link is in,
4648 # return target of link relative to top directory (top tree);
4649 # return undef if it is not possible (including absolute links).
4650 sub normalize_link_target {
4651         my ($link_target, $basedir) = @_;
4652
4653         # absolute symlinks (beginning with '/') cannot be normalized
4654         return if (substr($link_target, 0, 1) eq '/');
4655
4656         # normalize link target to path from top (root) tree (dir)
4657         my $path;
4658         if ($basedir) {
4659                 $path = $basedir . '/' . $link_target;
4660         } else {
4661                 # we are in top (root) tree (dir)
4662                 $path = $link_target;
4663         }
4664
4665         # remove //, /./, and /../
4666         my @path_parts;
4667         foreach my $part (split('/', $path)) {
4668                 # discard '.' and ''
4669                 next if (!$part || $part eq '.');
4670                 # handle '..'
4671                 if ($part eq '..') {
4672                         if (@path_parts) {
4673                                 pop @path_parts;
4674                         } else {
4675                                 # link leads outside repository (outside top dir)
4676                                 return;
4677                         }
4678                 } else {
4679                         push @path_parts, $part;
4680                 }
4681         }
4682         $path = join('/', @path_parts);
4683
4684         return $path;
4685 }
4686
4687 # print tree entry (row of git_tree), but without encompassing <tr> element
4688 sub git_print_tree_entry {
4689         my ($t, $basedir, $hash_base, $have_blame) = @_;
4690
4691         my %base_key = ();
4692         $base_key{'hash_base'} = $hash_base if defined $hash_base;
4693
4694         # The format of a table row is: mode list link.  Where mode is
4695         # the mode of the entry, list is the name of the entry, an href,
4696         # and link is the action links of the entry.
4697
4698         print "<td class=\"mode\">" . mode_str($t->{'mode'}) . "</td>\n";
4699         if (exists $t->{'size'}) {
4700                 print "<td class=\"size\">$t->{'size'}</td>\n";
4701         }
4702         if ($t->{'type'} eq "blob") {
4703                 print "<td class=\"list\">" .
4704                         $cgi->a({-href => href(action=>"blob", hash=>$t->{'hash'},
4705                                                file_name=>"$basedir$t->{'name'}", %base_key),
4706                                 -class => "list"}, esc_path($t->{'name'}));
4707                 if (S_ISLNK(oct $t->{'mode'})) {
4708                         my $link_target = git_get_link_target($t->{'hash'});
4709                         if ($link_target) {
4710                                 my $norm_target = normalize_link_target($link_target, $basedir);
4711                                 if (defined $norm_target) {
4712                                         print " -> " .
4713                                               $cgi->a({-href => href(action=>"object", hash_base=>$hash_base,
4714                                                                      file_name=>$norm_target),
4715                                                        -title => $norm_target}, esc_path($link_target));
4716                                 } else {
4717                                         print " -> " . esc_path($link_target);
4718                                 }
4719                         }
4720                 }
4721                 print "</td>\n";
4722                 print "<td class=\"link\">";
4723                 print $cgi->a({-href => href(action=>"blob", hash=>$t->{'hash'},
4724                                              file_name=>"$basedir$t->{'name'}", %base_key)},
4725                               "blob");
4726                 if ($have_blame) {
4727                         print " | " .
4728                               $cgi->a({-href => href(action=>"blame", hash=>$t->{'hash'},
4729                                                      file_name=>"$basedir$t->{'name'}", %base_key)},
4730                                       "blame");
4731                 }
4732                 if (defined $hash_base) {
4733                         print " | " .
4734                               $cgi->a({-href => href(action=>"history", hash_base=>$hash_base,
4735                                                      hash=>$t->{'hash'}, file_name=>"$basedir$t->{'name'}")},
4736                                       "history");
4737                 }
4738                 print " | " .
4739                         $cgi->a({-href => href(action=>"blob_plain", hash_base=>$hash_base,
4740                                                file_name=>"$basedir$t->{'name'}")},
4741                                 "raw");
4742                 print "</td>\n";
4743
4744         } elsif ($t->{'type'} eq "tree") {
4745                 print "<td class=\"list\">";
4746                 print $cgi->a({-href => href(action=>"tree", hash=>$t->{'hash'},
4747                                              file_name=>"$basedir$t->{'name'}",
4748                                              %base_key)},
4749                               esc_path($t->{'name'}));
4750                 print "</td>\n";
4751                 print "<td class=\"link\">";
4752                 print $cgi->a({-href => href(action=>"tree", hash=>$t->{'hash'},
4753                                              file_name=>"$basedir$t->{'name'}",
4754                                              %base_key)},
4755                               "tree");
4756                 if (defined $hash_base) {
4757                         print " | " .
4758                               $cgi->a({-href => href(action=>"history", hash_base=>$hash_base,
4759                                                      file_name=>"$basedir$t->{'name'}")},
4760                                       "history");
4761                 }
4762                 print "</td>\n";
4763         } else {
4764                 # unknown object: we can only present history for it
4765                 # (this includes 'commit' object, i.e. submodule support)
4766                 print "<td class=\"list\">" .
4767                       esc_path($t->{'name'}) .
4768                       "</td>\n";
4769                 print "<td class=\"link\">";
4770                 if (defined $hash_base) {
4771                         print $cgi->a({-href => href(action=>"history",
4772                                                      hash_base=>$hash_base,
4773                                                      file_name=>"$basedir$t->{'name'}")},
4774                                       "history");
4775                 }
4776                 print "</td>\n";
4777         }
4778 }
4779
4780 ## ......................................................................
4781 ## functions printing large fragments of HTML
4782
4783 # get pre-image filenames for merge (combined) diff
4784 sub fill_from_file_info {
4785         my ($diff, @parents) = @_;
4786
4787         $diff->{'from_file'} = [ ];
4788         $diff->{'from_file'}[$diff->{'nparents'} - 1] = undef;
4789         for (my $i = 0; $i < $diff->{'nparents'}; $i++) {
4790                 if ($diff->{'status'}[$i] eq 'R' ||
4791                     $diff->{'status'}[$i] eq 'C') {
4792                         $diff->{'from_file'}[$i] =
4793                                 git_get_path_by_hash($parents[$i], $diff->{'from_id'}[$i]);
4794                 }
4795         }
4796
4797         return $diff;
4798 }
4799
4800 # is current raw difftree line of file deletion
4801 sub is_deleted {
4802         my $diffinfo = shift;
4803
4804         return $diffinfo->{'to_id'} eq ('0' x 40);
4805 }
4806
4807 # does patch correspond to [previous] difftree raw line
4808 # $diffinfo  - hashref of parsed raw diff format
4809 # $patchinfo - hashref of parsed patch diff format
4810 #              (the same keys as in $diffinfo)
4811 sub is_patch_split {
4812         my ($diffinfo, $patchinfo) = @_;
4813
4814         return defined $diffinfo && defined $patchinfo
4815                 && $diffinfo->{'to_file'} eq $patchinfo->{'to_file'};
4816 }
4817
4818
4819 sub git_difftree_body {
4820         my ($difftree, $hash, @parents) = @_;
4821         my ($parent) = $parents[0];
4822         my $have_blame = gitweb_check_feature('blame');
4823         print "<div class=\"list_head\">\n";
4824         if ($#{$difftree} > 10) {
4825                 print(($#{$difftree} + 1) . " files changed:\n");
4826         }
4827         print "</div>\n";
4828
4829         print "<table class=\"" .
4830               (@parents > 1 ? "combined " : "") .
4831               "diff_tree\">\n";
4832
4833         # header only for combined diff in 'commitdiff' view
4834         my $has_header = @$difftree && @parents > 1 && $action eq 'commitdiff';
4835         if ($has_header) {
4836                 # table header
4837                 print "<thead><tr>\n" .
4838                        "<th></th><th></th>\n"; # filename, patchN link
4839                 for (my $i = 0; $i < @parents; $i++) {
4840                         my $par = $parents[$i];
4841                         print "<th>" .
4842                               $cgi->a({-href => href(action=>"commitdiff",
4843                                                      hash=>$hash, hash_parent=>$par),
4844                                        -title => 'commitdiff to parent number ' .
4845                                                   ($i+1) . ': ' . substr($par,0,7)},
4846                                       $i+1) .
4847                               "&nbsp;</th>\n";
4848                 }
4849                 print "</tr></thead>\n<tbody>\n";
4850         }
4851
4852         my $alternate = 1;
4853         my $patchno = 0;
4854         foreach my $line (@{$difftree}) {
4855                 my $diff = parsed_difftree_line($line);
4856
4857                 if ($alternate) {
4858                         print "<tr class=\"dark\">\n";
4859                 } else {
4860                         print "<tr class=\"light\">\n";
4861                 }
4862                 $alternate ^= 1;
4863
4864                 if (exists $diff->{'nparents'}) { # combined diff
4865
4866                         fill_from_file_info($diff, @parents)
4867                                 unless exists $diff->{'from_file'};
4868
4869                         if (!is_deleted($diff)) {
4870                                 # file exists in the result (child) commit
4871                                 print "<td>" .
4872                                       $cgi->a({-href => href(action=>"blob", hash=>$diff->{'to_id'},
4873                                                              file_name=>$diff->{'to_file'},
4874                                                              hash_base=>$hash),
4875                                               -class => "list"}, esc_path($diff->{'to_file'})) .
4876                                       "</td>\n";
4877                         } else {
4878                                 print "<td>" .
4879                                       esc_path($diff->{'to_file'}) .
4880                                       "</td>\n";
4881                         }
4882
4883                         if ($action eq 'commitdiff') {
4884                                 # link to patch
4885                                 $patchno++;
4886                                 print "<td class=\"link\">" .
4887                                       $cgi->a({-href => href(-anchor=>"patch$patchno")},
4888                                               "patch") .
4889                                       " | " .
4890                                       "</td>\n";
4891                         }
4892
4893                         my $has_history = 0;
4894                         my $not_deleted = 0;
4895                         for (my $i = 0; $i < $diff->{'nparents'}; $i++) {
4896                                 my $hash_parent = $parents[$i];
4897                                 my $from_hash = $diff->{'from_id'}[$i];
4898                                 my $from_path = $diff->{'from_file'}[$i];
4899                                 my $status = $diff->{'status'}[$i];
4900
4901                                 $has_history ||= ($status ne 'A');
4902                                 $not_deleted ||= ($status ne 'D');
4903
4904                                 if ($status eq 'A') {
4905                                         print "<td  class=\"link\" align=\"right\"> | </td>\n";
4906                                 } elsif ($status eq 'D') {
4907                                         print "<td class=\"link\">" .
4908                                               $cgi->a({-href => href(action=>"blob",
4909                                                                      hash_base=>$hash,
4910                                                                      hash=>$from_hash,
4911                                                                      file_name=>$from_path)},
4912                                                       "blob" . ($i+1)) .
4913                                               " | </td>\n";
4914                                 } else {
4915                                         if ($diff->{'to_id'} eq $from_hash) {
4916                                                 print "<td class=\"link nochange\">";
4917                                         } else {
4918                                                 print "<td class=\"link\">";
4919                                         }
4920                                         print $cgi->a({-href => href(action=>"blobdiff",
4921                                                                      hash=>$diff->{'to_id'},
4922                                                                      hash_parent=>$from_hash,
4923                                                                      hash_base=>$hash,
4924                                                                      hash_parent_base=>$hash_parent,
4925                                                                      file_name=>$diff->{'to_file'},
4926                                                                      file_parent=>$from_path)},
4927                                                       "diff" . ($i+1)) .
4928                                               " | </td>\n";
4929                                 }
4930                         }
4931
4932                         print "<td class=\"link\">";
4933                         if ($not_deleted) {
4934                                 print $cgi->a({-href => href(action=>"blob",
4935                                                              hash=>$diff->{'to_id'},
4936                                                              file_name=>$diff->{'to_file'},
4937                                                              hash_base=>$hash)},
4938                                               "blob");
4939                                 print " | " if ($has_history);
4940                         }
4941                         if ($has_history) {
4942                                 print $cgi->a({-href => href(action=>"history",
4943                                                              file_name=>$diff->{'to_file'},
4944                                                              hash_base=>$hash)},
4945                                               "history");
4946                         }
4947                         print "</td>\n";
4948
4949                         print "</tr>\n";
4950                         next; # instead of 'else' clause, to avoid extra indent
4951                 }
4952                 # else ordinary diff
4953
4954                 my ($to_mode_oct, $to_mode_str, $to_file_type);
4955                 my ($from_mode_oct, $from_mode_str, $from_file_type);
4956                 if ($diff->{'to_mode'} ne ('0' x 6)) {
4957                         $to_mode_oct = oct $diff->{'to_mode'};
4958                         if (S_ISREG($to_mode_oct)) { # only for regular file
4959                                 $to_mode_str = sprintf("%04o", $to_mode_oct & 0777); # permission bits
4960                         }
4961                         $to_file_type = file_type($diff->{'to_mode'});
4962                 }
4963                 if ($diff->{'from_mode'} ne ('0' x 6)) {
4964                         $from_mode_oct = oct $diff->{'from_mode'};
4965                         if (S_ISREG($from_mode_oct)) { # only for regular file
4966                                 $from_mode_str = sprintf("%04o", $from_mode_oct & 0777); # permission bits
4967                         }
4968                         $from_file_type = file_type($diff->{'from_mode'});
4969                 }
4970
4971                 if ($diff->{'status'} eq "A") { # created
4972                         my $mode_chng = "<span class=\"file_status new\">[new $to_file_type";
4973                         $mode_chng   .= " with mode: $to_mode_str" if $to_mode_str;
4974                         $mode_chng   .= "]</span>";
4975                         print "<td>";
4976                         print $cgi->a({-href => href(action=>"blob", hash=>$diff->{'to_id'},
4977                                                      hash_base=>$hash, file_name=>$diff->{'file'}),
4978                                       -class => "list"}, esc_path($diff->{'file'}));
4979                         print "</td>\n";
4980                         print "<td>$mode_chng</td>\n";
4981                         print "<td class=\"link\">";
4982                         if ($action eq 'commitdiff') {
4983                                 # link to patch
4984                                 $patchno++;
4985                                 print $cgi->a({-href => href(-anchor=>"patch$patchno")},
4986                                               "patch") .
4987                                       " | ";
4988                         }
4989                         print $cgi->a({-href => href(action=>"blob", hash=>$diff->{'to_id'},
4990                                                      hash_base=>$hash, file_name=>$diff->{'file'})},
4991                                       "blob");
4992                         print "</td>\n";
4993
4994                 } elsif ($diff->{'status'} eq "D") { # deleted
4995                         my $mode_chng = "<span class=\"file_status deleted\">[deleted $from_file_type]</span>";
4996                         print "<td>";
4997                         print $cgi->a({-href => href(action=>"blob", hash=>$diff->{'from_id'},
4998                                                      hash_base=>$parent, file_name=>$diff->{'file'}),
4999                                        -class => "list"}, esc_path($diff->{'file'}));
5000                         print "</td>\n";
5001                         print "<td>$mode_chng</td>\n";
5002                         print "<td class=\"link\">";
5003                         if ($action eq 'commitdiff') {
5004                                 # link to patch
5005                                 $patchno++;
5006                                 print $cgi->a({-href => href(-anchor=>"patch$patchno")},
5007                                               "patch") .
5008                                       " | ";
5009                         }
5010                         print $cgi->a({-href => href(action=>"blob", hash=>$diff->{'from_id'},
5011                                                      hash_base=>$parent, file_name=>$diff->{'file'})},
5012                                       "blob") . " | ";
5013                         if ($have_blame) {
5014                                 print $cgi->a({-href => href(action=>"blame", hash_base=>$parent,
5015                                                              file_name=>$diff->{'file'})},
5016                                               "blame") . " | ";
5017                         }
5018                         print $cgi->a({-href => href(action=>"history", hash_base=>$parent,
5019                                                      file_name=>$diff->{'file'})},
5020                                       "history");
5021                         print "</td>\n";
5022
5023                 } elsif ($diff->{'status'} eq "M" || $diff->{'status'} eq "T") { # modified, or type changed
5024                         my $mode_chnge = "";
5025                         if ($diff->{'from_mode'} != $diff->{'to_mode'}) {
5026                                 $mode_chnge = "<span class=\"file_status mode_chnge\">[changed";
5027                                 if ($from_file_type ne $to_file_type) {
5028                                         $mode_chnge .= " from $from_file_type to $to_file_type";
5029                                 }
5030                                 if (($from_mode_oct & 0777) != ($to_mode_oct & 0777)) {
5031                                         if ($from_mode_str && $to_mode_str) {
5032                                                 $mode_chnge .= " mode: $from_mode_str->$to_mode_str";
5033                                         } elsif ($to_mode_str) {
5034                                                 $mode_chnge .= " mode: $to_mode_str";
5035                                         }
5036                                 }
5037                                 $mode_chnge .= "]</span>\n";
5038                         }
5039                         print "<td>";
5040                         print $cgi->a({-href => href(action=>"blob", hash=>$diff->{'to_id'},
5041                                                      hash_base=>$hash, file_name=>$diff->{'file'}),
5042                                       -class => "list"}, esc_path($diff->{'file'}));
5043                         print "</td>\n";
5044                         print "<td>$mode_chnge</td>\n";
5045                         print "<td class=\"link\">";
5046                         if ($action eq 'commitdiff') {
5047                                 # link to patch
5048                                 $patchno++;
5049                                 print $cgi->a({-href => href(-anchor=>"patch$patchno")},
5050                                               "patch") .
5051                                       " | ";
5052                         } elsif ($diff->{'to_id'} ne $diff->{'from_id'}) {
5053                                 # "commit" view and modified file (not onlu mode changed)
5054                                 print $cgi->a({-href => href(action=>"blobdiff",
5055                                                              hash=>$diff->{'to_id'}, hash_parent=>$diff->{'from_id'},
5056                                                              hash_base=>$hash, hash_parent_base=>$parent,
5057                                                              file_name=>$diff->{'file'})},
5058                                               "diff") .
5059                                       " | ";
5060                         }
5061                         print $cgi->a({-href => href(action=>"blob", hash=>$diff->{'to_id'},
5062                                                      hash_base=>$hash, file_name=>$diff->{'file'})},
5063                                        "blob") . " | ";
5064                         if ($have_blame) {
5065                                 print $cgi->a({-href => href(action=>"blame", hash_base=>$hash,
5066                                                              file_name=>$diff->{'file'})},
5067                                               "blame") . " | ";
5068                         }
5069                         print $cgi->a({-href => href(action=>"history", hash_base=>$hash,
5070                                                      file_name=>$diff->{'file'})},
5071                                       "history");
5072                         print "</td>\n";
5073
5074                 } elsif ($diff->{'status'} eq "R" || $diff->{'status'} eq "C") { # renamed or copied
5075                         my %status_name = ('R' => 'moved', 'C' => 'copied');
5076                         my $nstatus = $status_name{$diff->{'status'}};
5077                         my $mode_chng = "";
5078                         if ($diff->{'from_mode'} != $diff->{'to_mode'}) {
5079                                 # mode also for directories, so we cannot use $to_mode_str
5080                                 $mode_chng = sprintf(", mode: %04o", $to_mode_oct & 0777);
5081                         }
5082                         print "<td>" .
5083                               $cgi->a({-href => href(action=>"blob", hash_base=>$hash,
5084                                                      hash=>$diff->{'to_id'}, file_name=>$diff->{'to_file'}),
5085                                       -class => "list"}, esc_path($diff->{'to_file'})) . "</td>\n" .
5086                               "<td><span class=\"file_status $nstatus\">[$nstatus from " .
5087                               $cgi->a({-href => href(action=>"blob", hash_base=>$parent,
5088                                                      hash=>$diff->{'from_id'}, file_name=>$diff->{'from_file'}),
5089                                       -class => "list"}, esc_path($diff->{'from_file'})) .
5090                               " with " . (int $diff->{'similarity'}) . "% similarity$mode_chng]</span></td>\n" .
5091                               "<td class=\"link\">";
5092                         if ($action eq 'commitdiff') {
5093                                 # link to patch
5094                                 $patchno++;
5095                                 print $cgi->a({-href => href(-anchor=>"patch$patchno")},
5096                                               "patch") .
5097                                       " | ";
5098                         } elsif ($diff->{'to_id'} ne $diff->{'from_id'}) {
5099                                 # "commit" view and modified file (not only pure rename or copy)
5100                                 print $cgi->a({-href => href(action=>"blobdiff",
5101                                                              hash=>$diff->{'to_id'}, hash_parent=>$diff->{'from_id'},
5102                                                              hash_base=>$hash, hash_parent_base=>$parent,
5103                                                              file_name=>$diff->{'to_file'}, file_parent=>$diff->{'from_file'})},
5104                                               "diff") .
5105                                       " | ";
5106                         }
5107                         print $cgi->a({-href => href(action=>"blob", hash=>$diff->{'to_id'},
5108                                                      hash_base=>$parent, file_name=>$diff->{'to_file'})},
5109                                       "blob") . " | ";
5110                         if ($have_blame) {
5111                                 print $cgi->a({-href => href(action=>"blame", hash_base=>$hash,
5112                                                              file_name=>$diff->{'to_file'})},
5113                                               "blame") . " | ";
5114                         }
5115                         print $cgi->a({-href => href(action=>"history", hash_base=>$hash,
5116                                                     file_name=>$diff->{'to_file'})},
5117                                       "history");
5118                         print "</td>\n";
5119
5120                 } # we should not encounter Unmerged (U) or Unknown (X) status
5121                 print "</tr>\n";
5122         }
5123         print "</tbody>" if $has_header;
5124         print "</table>\n";
5125 }
5126
5127 # Print context lines and then rem/add lines in a side-by-side manner.
5128 sub print_sidebyside_diff_lines {
5129         my ($ctx, $rem, $add) = @_;
5130
5131         # print context block before add/rem block
5132         if (@$ctx) {
5133                 print join '',
5134                         '<div class="chunk_block ctx">',
5135                                 '<div class="old">',
5136                                 @$ctx,
5137                                 '</div>',
5138                                 '<div class="new">',
5139                                 @$ctx,
5140                                 '</div>',
5141                         '</div>';
5142         }
5143
5144         if (!@$add) {
5145                 # pure removal
5146                 print join '',
5147                         '<div class="chunk_block rem">',
5148                                 '<div class="old">',
5149                                 @$rem,
5150                                 '</div>',
5151                         '</div>';
5152         } elsif (!@$rem) {
5153                 # pure addition
5154                 print join '',
5155                         '<div class="chunk_block add">',
5156                                 '<div class="new">',
5157                                 @$add,
5158                                 '</div>',
5159                         '</div>';
5160         } else {
5161                 print join '',
5162                         '<div class="chunk_block chg">',
5163                                 '<div class="old">',
5164                                 @$rem,
5165                                 '</div>',
5166                                 '<div class="new">',
5167                                 @$add,
5168                                 '</div>',
5169                         '</div>';
5170         }
5171 }
5172
5173 # Print context lines and then rem/add lines in inline manner.
5174 sub print_inline_diff_lines {
5175         my ($ctx, $rem, $add) = @_;
5176
5177         print @$ctx, @$rem, @$add;
5178 }
5179
5180 # Format removed and added line, mark changed part and HTML-format them.
5181 # Implementation is based on contrib/diff-highlight
5182 sub format_rem_add_lines_pair {
5183         my ($rem, $add, $num_parents) = @_;
5184
5185         # We need to untabify lines before split()'ing them;
5186         # otherwise offsets would be invalid.
5187         chomp $rem;
5188         chomp $add;
5189         $rem = untabify($rem);
5190         $add = untabify($add);
5191
5192         my @rem = split(//, $rem);
5193         my @add = split(//, $add);
5194         my ($esc_rem, $esc_add);
5195         # Ignore leading +/- characters for each parent.
5196         my ($prefix_len, $suffix_len) = ($num_parents, 0);
5197         my ($prefix_has_nonspace, $suffix_has_nonspace);
5198
5199         my $shorter = (@rem < @add) ? @rem : @add;
5200         while ($prefix_len < $shorter) {
5201                 last if ($rem[$prefix_len] ne $add[$prefix_len]);
5202
5203                 $prefix_has_nonspace = 1 if ($rem[$prefix_len] !~ /\s/);
5204                 $prefix_len++;
5205         }
5206
5207         while ($prefix_len + $suffix_len < $shorter) {
5208                 last if ($rem[-1 - $suffix_len] ne $add[-1 - $suffix_len]);
5209
5210                 $suffix_has_nonspace = 1 if ($rem[-1 - $suffix_len] !~ /\s/);
5211                 $suffix_len++;
5212         }
5213
5214         # Mark lines that are different from each other, but have some common
5215         # part that isn't whitespace.  If lines are completely different, don't
5216         # mark them because that would make output unreadable, especially if
5217         # diff consists of multiple lines.
5218         if ($prefix_has_nonspace || $suffix_has_nonspace) {
5219                 $esc_rem = esc_html_hl_regions($rem, 'marked',
5220                         [$prefix_len, @rem - $suffix_len], -nbsp=>1);
5221                 $esc_add = esc_html_hl_regions($add, 'marked',
5222                         [$prefix_len, @add - $suffix_len], -nbsp=>1);
5223         } else {
5224                 $esc_rem = esc_html($rem, -nbsp=>1);
5225                 $esc_add = esc_html($add, -nbsp=>1);
5226         }
5227
5228         return format_diff_line(\$esc_rem, 'rem'),
5229                format_diff_line(\$esc_add, 'add');
5230 }
5231
5232 # HTML-format diff context, removed and added lines.
5233 sub format_ctx_rem_add_lines {
5234         my ($ctx, $rem, $add, $num_parents) = @_;
5235         my (@new_ctx, @new_rem, @new_add);
5236         my $can_highlight = 0;
5237         my $is_combined = ($num_parents > 1);
5238
5239         # Highlight if every removed line has a corresponding added line.
5240         if (@$add > 0 && @$add == @$rem) {
5241                 $can_highlight = 1;
5242
5243                 # Highlight lines in combined diff only if the chunk contains
5244                 # diff between the same version, e.g.
5245                 #
5246                 #    - a
5247                 #   -  b
5248                 #    + c
5249                 #   +  d
5250                 #
5251                 # Otherwise the highlightling would be confusing.
5252                 if ($is_combined) {
5253                         for (my $i = 0; $i < @$add; $i++) {
5254                                 my $prefix_rem = substr($rem->[$i], 0, $num_parents);
5255                                 my $prefix_add = substr($add->[$i], 0, $num_parents);
5256
5257                                 $prefix_rem =~ s/-/+/g;
5258
5259                                 if ($prefix_rem ne $prefix_add) {
5260                                         $can_highlight = 0;
5261                                         last;
5262                                 }
5263                         }
5264                 }
5265         }
5266
5267         if ($can_highlight) {
5268                 for (my $i = 0; $i < @$add; $i++) {
5269                         my ($line_rem, $line_add) = format_rem_add_lines_pair(
5270                                 $rem->[$i], $add->[$i], $num_parents);
5271                         push @new_rem, $line_rem;
5272                         push @new_add, $line_add;
5273                 }
5274         } else {
5275                 @new_rem = map { format_diff_line($_, 'rem') } @$rem;
5276                 @new_add = map { format_diff_line($_, 'add') } @$add;
5277         }
5278
5279         @new_ctx = map { format_diff_line($_, 'ctx') } @$ctx;
5280
5281         return (\@new_ctx, \@new_rem, \@new_add);
5282 }
5283
5284 # Print context lines and then rem/add lines.
5285 sub print_diff_lines {
5286         my ($ctx, $rem, $add, $diff_style, $num_parents) = @_;
5287         my $is_combined = $num_parents > 1;
5288
5289         ($ctx, $rem, $add) = format_ctx_rem_add_lines($ctx, $rem, $add,
5290                 $num_parents);
5291
5292         if ($diff_style eq 'sidebyside' && !$is_combined) {
5293                 print_sidebyside_diff_lines($ctx, $rem, $add);
5294         } else {
5295                 # default 'inline' style and unknown styles
5296                 print_inline_diff_lines($ctx, $rem, $add);
5297         }
5298 }
5299
5300 sub print_diff_chunk {
5301         my ($diff_style, $num_parents, $from, $to, @chunk) = @_;
5302         my (@ctx, @rem, @add);
5303
5304         # The class of the previous line.
5305         my $prev_class = '';
5306
5307         return unless @chunk;
5308
5309         # incomplete last line might be among removed or added lines,
5310         # or both, or among context lines: find which
5311         for (my $i = 1; $i < @chunk; $i++) {
5312                 if ($chunk[$i][0] eq 'incomplete') {
5313                         $chunk[$i][0] = $chunk[$i-1][0];
5314                 }
5315         }
5316
5317         # guardian
5318         push @chunk, ["", ""];
5319
5320         foreach my $line_info (@chunk) {
5321                 my ($class, $line) = @$line_info;
5322
5323                 # print chunk headers
5324                 if ($class && $class eq 'chunk_header') {
5325                         print format_diff_line($line, $class, $from, $to);
5326                         next;
5327                 }
5328
5329                 ## print from accumulator when have some add/rem lines or end
5330                 # of chunk (flush context lines), or when have add and rem
5331                 # lines and new block is reached (otherwise add/rem lines could
5332                 # be reordered)
5333                 if (!$class || ((@rem || @add) && $class eq 'ctx') ||
5334                     (@rem && @add && $class ne $prev_class)) {
5335                         print_diff_lines(\@ctx, \@rem, \@add,
5336                                          $diff_style, $num_parents);
5337                         @ctx = @rem = @add = ();
5338                 }
5339
5340                 ## adding lines to accumulator
5341                 # guardian value
5342                 last unless $line;
5343                 # rem, add or change
5344                 if ($class eq 'rem') {
5345                         push @rem, $line;
5346                 } elsif ($class eq 'add') {
5347                         push @add, $line;
5348                 }
5349                 # context line
5350                 if ($class eq 'ctx') {
5351                         push @ctx, $line;
5352                 }
5353
5354                 $prev_class = $class;
5355         }
5356 }
5357
5358 sub git_patchset_body {
5359         my ($fd, $diff_style, $difftree, $hash, @hash_parents) = @_;
5360         my ($hash_parent) = $hash_parents[0];
5361
5362         my $is_combined = (@hash_parents > 1);
5363         my $patch_idx = 0;
5364         my $patch_number = 0;
5365         my $patch_line;
5366         my $diffinfo;
5367         my $to_name;
5368         my (%from, %to);
5369         my @chunk; # for side-by-side diff
5370
5371         print "<div class=\"patchset\">\n";
5372
5373         # skip to first patch
5374         while ($patch_line = <$fd>) {
5375                 chomp $patch_line;
5376
5377                 last if ($patch_line =~ m/^diff /);
5378         }
5379
5380  PATCH:
5381         while ($patch_line) {
5382
5383                 # parse "git diff" header line
5384                 if ($patch_line =~ m/^diff --git (\"(?:[^\\\"]*(?:\\.[^\\\"]*)*)\"|[^ "]*) (.*)$/) {
5385                         # $1 is from_name, which we do not use
5386                         $to_name = unquote($2);
5387                         $to_name =~ s!^b/!!;
5388                 } elsif ($patch_line =~ m/^diff --(cc|combined) ("?.*"?)$/) {
5389                         # $1 is 'cc' or 'combined', which we do not use
5390                         $to_name = unquote($2);
5391                 } else {
5392                         $to_name = undef;
5393                 }
5394
5395                 # check if current patch belong to current raw line
5396                 # and parse raw git-diff line if needed
5397                 if (is_patch_split($diffinfo, { 'to_file' => $to_name })) {
5398                         # this is continuation of a split patch
5399                         print "<div class=\"patch cont\">\n";
5400                 } else {
5401                         # advance raw git-diff output if needed
5402                         $patch_idx++ if defined $diffinfo;
5403
5404                         # read and prepare patch information
5405                         $diffinfo = parsed_difftree_line($difftree->[$patch_idx]);
5406
5407                         # compact combined diff output can have some patches skipped
5408                         # find which patch (using pathname of result) we are at now;
5409                         if ($is_combined) {
5410                                 while ($to_name ne $diffinfo->{'to_file'}) {
5411                                         print "<div class=\"patch\" id=\"patch". ($patch_idx+1) ."\">\n" .
5412                                               format_diff_cc_simplified($diffinfo, @hash_parents) .
5413                                               "</div>\n";  # class="patch"
5414
5415                                         $patch_idx++;
5416                                         $patch_number++;
5417
5418                                         last if $patch_idx > $#$difftree;
5419                                         $diffinfo = parsed_difftree_line($difftree->[$patch_idx]);
5420                                 }
5421                         }
5422
5423                         # modifies %from, %to hashes
5424                         parse_from_to_diffinfo($diffinfo, \%from, \%to, @hash_parents);
5425
5426                         # this is first patch for raw difftree line with $patch_idx index
5427                         # we index @$difftree array from 0, but number patches from 1
5428                         print "<div class=\"patch\" id=\"patch". ($patch_idx+1) ."\">\n";
5429                 }
5430
5431                 # git diff header
5432                 #assert($patch_line =~ m/^diff /) if DEBUG;
5433                 #assert($patch_line !~ m!$/$!) if DEBUG; # is chomp-ed
5434                 $patch_number++;
5435                 # print "git diff" header
5436                 print format_git_diff_header_line($patch_line, $diffinfo,
5437                                                   \%from, \%to);
5438
5439                 # print extended diff header
5440                 print "<div class=\"diff extended_header\">\n";
5441         EXTENDED_HEADER:
5442                 while ($patch_line = <$fd>) {
5443                         chomp $patch_line;
5444
5445                         last EXTENDED_HEADER if ($patch_line =~ m/^--- |^diff /);
5446
5447                         print format_extended_diff_header_line($patch_line, $diffinfo,
5448                                                                \%from, \%to);
5449                 }
5450                 print "</div>\n"; # class="diff extended_header"
5451
5452                 # from-file/to-file diff header
5453                 if (! $patch_line) {
5454                         print "</div>\n"; # class="patch"
5455                         last PATCH;
5456                 }
5457                 next PATCH if ($patch_line =~ m/^diff /);
5458                 #assert($patch_line =~ m/^---/) if DEBUG;
5459
5460                 my $last_patch_line = $patch_line;
5461                 $patch_line = <$fd>;
5462                 chomp $patch_line;
5463                 #assert($patch_line =~ m/^\+\+\+/) if DEBUG;
5464
5465                 print format_diff_from_to_header($last_patch_line, $patch_line,
5466                                                  $diffinfo, \%from, \%to,
5467                                                  @hash_parents);
5468
5469                 # the patch itself
5470         LINE:
5471                 while ($patch_line = <$fd>) {
5472                         chomp $patch_line;
5473
5474                         next PATCH if ($patch_line =~ m/^diff /);
5475
5476                         my $class = diff_line_class($patch_line, \%from, \%to);
5477
5478                         if ($class eq 'chunk_header') {
5479                                 print_diff_chunk($diff_style, scalar @hash_parents, \%from, \%to, @chunk);
5480                                 @chunk = ();
5481                         }
5482
5483                         push @chunk, [ $class, $patch_line ];
5484                 }
5485
5486         } continue {
5487                 if (@chunk) {
5488                         print_diff_chunk($diff_style, scalar @hash_parents, \%from, \%to, @chunk);
5489                         @chunk = ();
5490                 }
5491                 print "</div>\n"; # class="patch"
5492         }
5493
5494         # for compact combined (--cc) format, with chunk and patch simplification
5495         # the patchset might be empty, but there might be unprocessed raw lines
5496         for (++$patch_idx if $patch_number > 0;
5497              $patch_idx < @$difftree;
5498              ++$patch_idx) {
5499                 # read and prepare patch information
5500                 $diffinfo = parsed_difftree_line($difftree->[$patch_idx]);
5501
5502                 # generate anchor for "patch" links in difftree / whatchanged part
5503                 print "<div class=\"patch\" id=\"patch". ($patch_idx+1) ."\">\n" .
5504                       format_diff_cc_simplified($diffinfo, @hash_parents) .
5505                       "</div>\n";  # class="patch"
5506
5507                 $patch_number++;
5508         }
5509
5510         if ($patch_number == 0) {
5511                 if (@hash_parents > 1) {
5512                         print "<div class=\"diff nodifferences\">Trivial merge</div>\n";
5513                 } else {
5514                         print "<div class=\"diff nodifferences\">No differences found</div>\n";
5515                 }
5516         }
5517
5518         print "</div>\n"; # class="patchset"
5519 }
5520
5521 # . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
5522
5523 sub git_project_search_form {
5524         my ($searchtext, $search_use_regexp) = @_;
5525
5526         my $limit = '';
5527         if ($project_filter) {
5528                 $limit = " in '$project_filter/'";
5529         }
5530
5531         print "<div class=\"projsearch\">\n";
5532         print $cgi->start_form(-method => 'get', -action => $my_uri) .
5533               $cgi->hidden(-name => 'a', -value => 'project_list')  . "\n";
5534         print $cgi->hidden(-name => 'pf', -value => $project_filter). "\n"
5535                 if (defined $project_filter);
5536         print $cgi->textfield(-name => 's', -value => $searchtext,
5537                               -title => "Search project by name and description$limit",
5538                               -size => 60) . "\n" .
5539               "<span title=\"Extended regular expression\">" .
5540               $cgi->checkbox(-name => 'sr', -value => 1, -label => 're',
5541                              -checked => $search_use_regexp) .
5542               "</span>\n" .
5543               $cgi->submit(-name => 'btnS', -value => 'Search') .
5544               $cgi->end_form() . "\n" .
5545               $cgi->a({-href => href(project => undef, searchtext => undef,
5546                                      project_filter => $project_filter)},
5547                       esc_html("List all projects$limit")) . "<br />\n";
5548         print "</div>\n";
5549 }
5550
5551 # entry for given @keys needs filling if at least one of keys in list
5552 # is not present in %$project_info
5553 sub project_info_needs_filling {
5554         my ($project_info, @keys) = @_;
5555
5556         # return List::MoreUtils::any { !exists $project_info->{$_} } @keys;
5557         foreach my $key (@keys) {
5558                 if (!exists $project_info->{$key}) {
5559                         return 1;
5560                 }
5561         }
5562         return;
5563 }
5564
5565 # fills project list info (age, description, owner, category, forks, etc.)
5566 # for each project in the list, removing invalid projects from
5567 # returned list, or fill only specified info.
5568 #
5569 # Invalid projects are removed from the returned list if and only if you
5570 # ask 'age' or 'age_string' to be filled, because they are the only fields
5571 # that run unconditionally git command that requires repository, and
5572 # therefore do always check if project repository is invalid.
5573 #
5574 # USAGE:
5575 # * fill_project_list_info(\@project_list, 'descr_long', 'ctags')
5576 #   ensures that 'descr_long' and 'ctags' fields are filled
5577 # * @project_list = fill_project_list_info(\@project_list)
5578 #   ensures that all fields are filled (and invalid projects removed)
5579 #
5580 # NOTE: modifies $projlist, but does not remove entries from it
5581 sub fill_project_list_info {
5582         my ($projlist, @wanted_keys) = @_;
5583         my @projects;
5584         my $filter_set = sub { return @_; };
5585         if (@wanted_keys) {
5586                 my %wanted_keys = map { $_ => 1 } @wanted_keys;
5587                 $filter_set = sub { return grep { $wanted_keys{$_} } @_; };
5588         }
5589
5590         my $show_ctags = gitweb_check_feature('ctags');
5591  PROJECT:
5592         foreach my $pr (@$projlist) {
5593                 if (project_info_needs_filling($pr, $filter_set->('age', 'age_string'))) {
5594                         my (@activity) = git_get_last_activity($pr->{'path'});
5595                         unless (@activity) {
5596                                 next PROJECT;
5597                         }
5598                         ($pr->{'age'}, $pr->{'age_string'}) = @activity;
5599                 }
5600                 if (project_info_needs_filling($pr, $filter_set->('descr', 'descr_long'))) {
5601                         my $descr = git_get_project_description($pr->{'path'}) || "";
5602                         $descr = to_utf8($descr);
5603                         $pr->{'descr_long'} = $descr;
5604                         $pr->{'descr'} = chop_str($descr, $projects_list_description_width, 5);
5605                 }
5606                 if (project_info_needs_filling($pr, $filter_set->('owner'))) {
5607                         $pr->{'owner'} = git_get_project_owner("$pr->{'path'}") || "";
5608                 }
5609                 if ($show_ctags &&
5610                     project_info_needs_filling($pr, $filter_set->('ctags'))) {
5611                         $pr->{'ctags'} = git_get_project_ctags($pr->{'path'});
5612                 }
5613                 if ($projects_list_group_categories &&
5614                     project_info_needs_filling($pr, $filter_set->('category'))) {
5615                         my $cat = git_get_project_category($pr->{'path'}) ||
5616                                                            $project_list_default_category;
5617                         $pr->{'category'} = to_utf8($cat);
5618                 }
5619
5620                 push @projects, $pr;
5621         }
5622
5623         return @projects;
5624 }
5625
5626 sub sort_projects_list {
5627         my ($projlist, $order) = @_;
5628
5629         sub order_str {
5630                 my $key = shift;
5631                 return sub { $a->{$key} cmp $b->{$key} };
5632         }
5633
5634         sub order_num_then_undef {
5635                 my $key = shift;
5636                 return sub {
5637                         defined $a->{$key} ?
5638                                 (defined $b->{$key} ? $a->{$key} <=> $b->{$key} : -1) :
5639                                 (defined $b->{$key} ? 1 : 0)
5640                 };
5641         }
5642
5643         my %orderings = (
5644                 project => order_str('path'),
5645                 descr => order_str('descr_long'),
5646                 owner => order_str('owner'),
5647                 age => order_num_then_undef('age'),
5648         );
5649
5650         my $ordering = $orderings{$order};
5651         return defined $ordering ? sort $ordering @$projlist : @$projlist;
5652 }
5653
5654 # returns a hash of categories, containing the list of project
5655 # belonging to each category
5656 sub build_projlist_by_category {
5657         my ($projlist, $from, $to) = @_;
5658         my %categories;
5659
5660         $from = 0 unless defined $from;
5661         $to = $#$projlist if (!defined $to || $#$projlist < $to);
5662
5663         for (my $i = $from; $i <= $to; $i++) {
5664                 my $pr = $projlist->[$i];
5665                 push @{$categories{ $pr->{'category'} }}, $pr;
5666         }
5667
5668         return wantarray ? %categories : \%categories;
5669 }
5670
5671 # print 'sort by' <th> element, generating 'sort by $name' replay link
5672 # if that order is not selected
5673 sub print_sort_th {
5674         print format_sort_th(@_);
5675 }
5676
5677 sub format_sort_th {
5678         my ($name, $order, $header) = @_;
5679         my $sort_th = "";
5680         $header ||= ucfirst($name);
5681
5682         if ($order eq $name) {
5683                 $sort_th .= "<th>$header</th>\n";
5684         } else {
5685                 $sort_th .= "<th>" .
5686                             $cgi->a({-href => href(-replay=>1, order=>$name),
5687                                      -class => "header"}, $header) .
5688                             "</th>\n";
5689         }
5690
5691         return $sort_th;
5692 }
5693
5694 sub git_project_list_rows {
5695         my ($projlist, $from, $to, $check_forks) = @_;
5696
5697         $from = 0 unless defined $from;
5698         $to = $#$projlist if (!defined $to || $#$projlist < $to);
5699
5700         my $alternate = 1;
5701         for (my $i = $from; $i <= $to; $i++) {
5702                 my $pr = $projlist->[$i];
5703
5704                 if ($alternate) {
5705                         print "<tr class=\"dark\">\n";
5706                 } else {
5707                         print "<tr class=\"light\">\n";
5708                 }
5709                 $alternate ^= 1;
5710
5711                 if ($check_forks) {
5712                         print "<td>";
5713                         if ($pr->{'forks'}) {
5714                                 my $nforks = scalar @{$pr->{'forks'}};
5715                                 if ($nforks > 0) {
5716                                         print $cgi->a({-href => href(project=>$pr->{'path'}, action=>"forks"),
5717                                                        -title => "$nforks forks"}, "+");
5718                                 } else {
5719                                         print $cgi->span({-title => "$nforks forks"}, "+");
5720                                 }
5721                         }
5722                         print "</td>\n";
5723                 }
5724                 print "<td>" . $cgi->a({-href => href(project=>$pr->{'path'}, action=>"summary"),
5725                                         -class => "list"},
5726                                        esc_html_match_hl($pr->{'path'}, $search_regexp)) .
5727                       "</td>\n" .
5728                       "<td>" . $cgi->a({-href => href(project=>$pr->{'path'}, action=>"summary"),
5729                                         -class => "list",
5730                                         -title => $pr->{'descr_long'}},
5731                                         $search_regexp
5732                                         ? esc_html_match_hl_chopped($pr->{'descr_long'},
5733                                                                     $pr->{'descr'}, $search_regexp)
5734                                         : esc_html($pr->{'descr'})) .
5735                       "</td>\n";
5736                 unless ($omit_owner) {
5737                         print "<td><i>" . chop_and_escape_str($pr->{'owner'}, 15) . "</i></td>\n";
5738                 }
5739                 unless ($omit_age_column) {
5740                         print "<td class=\"". age_class($pr->{'age'}) . "\">" .
5741                             (defined $pr->{'age_string'} ? $pr->{'age_string'} : "No commits") . "</td>\n";
5742                 }
5743                 print"<td class=\"link\">" .
5744                       $cgi->a({-href => href(project=>$pr->{'path'}, action=>"summary")}, "summary")   . " | " .
5745                       $cgi->a({-href => href(project=>$pr->{'path'}, action=>"shortlog")}, "shortlog") . " | " .
5746                       $cgi->a({-href => href(project=>$pr->{'path'}, action=>"log")}, "log") . " | " .
5747                       $cgi->a({-href => href(project=>$pr->{'path'}, action=>"tree")}, "tree") .
5748                       ($pr->{'forks'} ? " | " . $cgi->a({-href => href(project=>$pr->{'path'}, action=>"forks")}, "forks") : '') .
5749                       "</td>\n" .
5750                       "</tr>\n";
5751         }
5752 }
5753
5754 sub git_project_list_body {
5755         # actually uses global variable $project
5756         my ($projlist, $order, $from, $to, $extra, $no_header, $ctags_action) = @_;
5757         my @projects = @$projlist;
5758
5759         my $check_forks = gitweb_check_feature('forks');
5760         my $show_ctags  = gitweb_check_feature('ctags');
5761         my $tagfilter = $show_ctags ? $input_params{'ctag_filter'} : undef;
5762         $check_forks = undef
5763                 if ($tagfilter || $search_regexp);
5764
5765         # filtering out forks before filling info allows to do less work
5766         @projects = filter_forks_from_projects_list(\@projects)
5767                 if ($check_forks);
5768         # search_projects_list pre-fills required info
5769         @projects = search_projects_list(\@projects,
5770                                          'search_regexp' => $search_regexp,
5771                                          'tagfilter'  => $tagfilter)
5772                 if ($tagfilter || $search_regexp);
5773         # fill the rest
5774         my @all_fields = ('descr', 'descr_long', 'ctags', 'category');
5775         push @all_fields, ('age', 'age_string') unless($omit_age_column);
5776         push @all_fields, 'owner' unless($omit_owner);
5777         @projects = fill_project_list_info(\@projects, @all_fields);
5778
5779         $order ||= $default_projects_order;
5780         $from = 0 unless defined $from;
5781         $to = $#projects if (!defined $to || $#projects < $to);
5782
5783         # short circuit
5784         if ($from > $to) {
5785                 print "<center>\n".
5786                       "<b>No such projects found</b><br />\n".
5787                       "Click ".$cgi->a({-href=>href(project=>undef)},"here")." to view all projects<br />\n".
5788                       "</center>\n<br />\n";
5789                 return;
5790         }
5791
5792         @projects = sort_projects_list(\@projects, $order);
5793
5794         if ($show_ctags) {
5795                 my $ctags = git_gather_all_ctags(\@projects);
5796                 my $cloud = git_populate_project_tagcloud($ctags, $ctags_action||'project_list');
5797                 print git_show_project_tagcloud($cloud, 64);
5798         }
5799
5800         print "<table class=\"project_list\">\n";
5801         unless ($no_header) {
5802                 print "<tr>\n";
5803                 if ($check_forks) {
5804                         print "<th></th>\n";
5805                 }
5806                 print_sort_th('project', $order, 'Project');
5807                 print_sort_th('descr', $order, 'Description');
5808                 print_sort_th('owner', $order, 'Owner') unless $omit_owner;
5809                 print_sort_th('age', $order, 'Last Change') unless $omit_age_column;
5810                 print "<th></th>\n" . # for links
5811                       "</tr>\n";
5812         }
5813
5814         if ($projects_list_group_categories) {
5815                 # only display categories with projects in the $from-$to window
5816                 @projects = sort {$a->{'category'} cmp $b->{'category'}} @projects[$from..$to];
5817                 my %categories = build_projlist_by_category(\@projects, $from, $to);
5818                 foreach my $cat (sort keys %categories) {
5819                         unless ($cat eq "") {
5820                                 print "<tr>\n";
5821                                 if ($check_forks) {
5822                                         print "<td></td>\n";
5823                                 }
5824                                 print "<td class=\"category\" colspan=\"5\">".esc_html($cat)."</td>\n";
5825                                 print "</tr>\n";
5826                         }
5827
5828                         git_project_list_rows($categories{$cat}, undef, undef, $check_forks);
5829                 }
5830         } else {
5831                 git_project_list_rows(\@projects, $from, $to, $check_forks);
5832         }
5833
5834         if (defined $extra) {
5835                 print "<tr>\n";
5836                 if ($check_forks) {
5837                         print "<td></td>\n";
5838                 }
5839                 print "<td colspan=\"5\">$extra</td>\n" .
5840                       "</tr>\n";
5841         }
5842         print "</table>\n";
5843 }
5844
5845 sub git_log_body {
5846         # uses global variable $project
5847         my ($commitlist, $from, $to, $refs, $extra) = @_;
5848
5849         $from = 0 unless defined $from;
5850         $to = $#{$commitlist} if (!defined $to || $#{$commitlist} < $to);
5851
5852         for (my $i = 0; $i <= $to; $i++) {
5853                 my %co = %{$commitlist->[$i]};
5854                 next if !%co;
5855                 my $commit = $co{'id'};
5856                 my $ref = format_ref_marker($refs, $commit);
5857                 git_print_header_div('commit',
5858                                "<span class=\"age\">$co{'age_string'}</span>" .
5859                                esc_html($co{'title'}) . $ref,
5860                                $commit);
5861                 print "<div class=\"title_text\">\n" .
5862                       "<div class=\"log_link\">\n" .
5863                       $cgi->a({-href => href(action=>"commit", hash=>$commit)}, "commit") .
5864                       " | " .
5865                       $cgi->a({-href => href(action=>"commitdiff", hash=>$commit)}, "commitdiff") .
5866                       " | " .
5867                       $cgi->a({-href => href(action=>"tree", hash=>$commit, hash_base=>$commit)}, "tree") .
5868                       "<br/>\n" .
5869                       "</div>\n";
5870                       git_print_authorship(\%co, -tag => 'span');
5871                       print "<br/>\n</div>\n";
5872
5873                 print "<div class=\"log_body\">\n";
5874                 git_print_log($co{'comment'}, -final_empty_line=> 1);
5875                 print "</div>\n";
5876         }
5877         if ($extra) {
5878                 print "<div class=\"page_nav\">\n";
5879                 print "$extra\n";
5880                 print "</div>\n";
5881         }
5882 }
5883
5884 sub git_shortlog_body {
5885         # uses global variable $project
5886         my ($commitlist, $from, $to, $refs, $extra) = @_;
5887
5888         $from = 0 unless defined $from;
5889         $to = $#{$commitlist} if (!defined $to || $#{$commitlist} < $to);
5890
5891         print "<table class=\"shortlog\">\n";
5892         my $alternate = 1;
5893         for (my $i = $from; $i <= $to; $i++) {
5894                 my %co = %{$commitlist->[$i]};
5895                 my $commit = $co{'id'};
5896                 my $ref = format_ref_marker($refs, $commit);
5897                 if ($alternate) {
5898                         print "<tr class=\"dark\">\n";
5899                 } else {
5900                         print "<tr class=\"light\">\n";
5901                 }
5902                 $alternate ^= 1;
5903                 # git_summary() used print "<td><i>$co{'age_string'}</i></td>\n" .
5904                 print "<td title=\"$co{'age_string_age'}\"><i>$co{'age_string_date'}</i></td>\n" .
5905                       format_author_html('td', \%co, 10) . "<td>";
5906                 print format_subject_html($co{'title'}, $co{'title_short'},
5907                                           href(action=>"commit", hash=>$commit), $ref);
5908                 print "</td>\n" .
5909                       "<td class=\"link\">" .
5910                       $cgi->a({-href => href(action=>"commit", hash=>$commit)}, "commit") . " | " .
5911                       $cgi->a({-href => href(action=>"commitdiff", hash=>$commit)}, "commitdiff") . " | " .
5912                       $cgi->a({-href => href(action=>"tree", hash=>$commit, hash_base=>$commit)}, "tree");
5913                 my $snapshot_links = format_snapshot_links($commit);
5914                 if (defined $snapshot_links) {
5915                         print " | " . $snapshot_links;
5916                 }
5917                 print "</td>\n" .
5918                       "</tr>\n";
5919         }
5920         if (defined $extra) {
5921                 print "<tr>\n" .
5922                       "<td colspan=\"4\">$extra</td>\n" .
5923                       "</tr>\n";
5924         }
5925         print "</table>\n";
5926 }
5927
5928 sub git_history_body {
5929         # Warning: assumes constant type (blob or tree) during history
5930         my ($commitlist, $from, $to, $refs, $extra,
5931             $file_name, $file_hash, $ftype) = @_;
5932
5933         $from = 0 unless defined $from;
5934         $to = $#{$commitlist} unless (defined $to && $to <= $#{$commitlist});
5935
5936         print "<table class=\"history\">\n";
5937         my $alternate = 1;
5938         for (my $i = $from; $i <= $to; $i++) {
5939                 my %co = %{$commitlist->[$i]};
5940                 if (!%co) {
5941                         next;
5942                 }
5943                 my $commit = $co{'id'};
5944
5945                 my $ref = format_ref_marker($refs, $commit);
5946
5947                 if ($alternate) {
5948                         print "<tr class=\"dark\">\n";
5949                 } else {
5950                         print "<tr class=\"light\">\n";
5951                 }
5952                 $alternate ^= 1;
5953                 print "<td title=\"$co{'age_string_age'}\"><i>$co{'age_string_date'}</i></td>\n" .
5954         # shortlog:   format_author_html('td', \%co, 10)
5955                       format_author_html('td', \%co, 15, 3) . "<td>";
5956                 # originally git_history used chop_str($co{'title'}, 50)
5957                 print format_subject_html($co{'title'}, $co{'title_short'},
5958                                           href(action=>"commit", hash=>$commit), $ref);
5959                 print "</td>\n" .
5960                       "<td class=\"link\">" .
5961                       $cgi->a({-href => href(action=>$ftype, hash_base=>$commit, file_name=>$file_name)}, $ftype) . " | " .
5962                       $cgi->a({-href => href(action=>"commitdiff", hash=>$commit)}, "commitdiff");
5963
5964                 if ($ftype eq 'blob') {
5965                         my $blob_current = $file_hash;
5966                         my $blob_parent  = git_get_hash_by_path($commit, $file_name);
5967                         if (defined $blob_current && defined $blob_parent &&
5968                                         $blob_current ne $blob_parent) {
5969                                 print " | " .
5970                                         $cgi->a({-href => href(action=>"blobdiff",
5971                                                                hash=>$blob_current, hash_parent=>$blob_parent,
5972                                                                hash_base=>$hash_base, hash_parent_base=>$commit,
5973                                                                file_name=>$file_name)},
5974                                                 "diff to current");
5975                         }
5976                 }
5977                 print "</td>\n" .
5978                       "</tr>\n";
5979         }
5980         if (defined $extra) {
5981                 print "<tr>\n" .
5982                       "<td colspan=\"4\">$extra</td>\n" .
5983                       "</tr>\n";
5984         }
5985         print "</table>\n";
5986 }
5987
5988 sub git_tags_body {
5989         # uses global variable $project
5990         my ($taglist, $from, $to, $extra) = @_;
5991         $from = 0 unless defined $from;
5992         $to = $#{$taglist} if (!defined $to || $#{$taglist} < $to);
5993
5994         print "<table class=\"tags\">\n";
5995         my $alternate = 1;
5996         for (my $i = $from; $i <= $to; $i++) {
5997                 my $entry = $taglist->[$i];
5998                 my %tag = %$entry;
5999                 my $comment = $tag{'subject'};
6000                 my $comment_short;
6001                 if (defined $comment) {
6002                         $comment_short = chop_str($comment, 30, 5);
6003                 }
6004                 if ($alternate) {
6005                         print "<tr class=\"dark\">\n";
6006                 } else {
6007                         print "<tr class=\"light\">\n";
6008                 }
6009                 $alternate ^= 1;
6010                 if (defined $tag{'age'}) {
6011                         print "<td><i>$tag{'age'}</i></td>\n";
6012                 } else {
6013                         print "<td></td>\n";
6014                 }
6015                 print "<td>" .
6016                       $cgi->a({-href => href(action=>$tag{'reftype'}, hash=>$tag{'refid'}),
6017                                -class => "list name"}, esc_html($tag{'name'})) .
6018                       "</td>\n" .
6019                       "<td>";
6020                 if (defined $comment) {
6021                         print format_subject_html($comment, $comment_short,
6022                                                   href(action=>"tag", hash=>$tag{'id'}));
6023                 }
6024                 print "</td>\n" .
6025                       "<td class=\"selflink\">";
6026                 if ($tag{'type'} eq "tag") {
6027                         print $cgi->a({-href => href(action=>"tag", hash=>$tag{'id'})}, "tag");
6028                 } else {
6029                         print "&nbsp;";
6030                 }
6031                 print "</td>\n" .
6032                       "<td class=\"link\">" . " | " .
6033                       $cgi->a({-href => href(action=>$tag{'reftype'}, hash=>$tag{'refid'})}, $tag{'reftype'});
6034                 if ($tag{'reftype'} eq "commit") {
6035                         print " | " . $cgi->a({-href => href(action=>"shortlog", hash=>$tag{'fullname'})}, "shortlog") .
6036                               " | " . $cgi->a({-href => href(action=>"log", hash=>$tag{'fullname'})}, "log");
6037                 } elsif ($tag{'reftype'} eq "blob") {
6038                         print " | " . $cgi->a({-href => href(action=>"blob_plain", hash=>$tag{'refid'})}, "raw");
6039                 }
6040                 print "</td>\n" .
6041                       "</tr>";
6042         }
6043         if (defined $extra) {
6044                 print "<tr>\n" .
6045                       "<td colspan=\"5\">$extra</td>\n" .
6046                       "</tr>\n";
6047         }
6048         print "</table>\n";
6049 }
6050
6051 sub git_heads_body {
6052         # uses global variable $project
6053         my ($headlist, $head_at, $from, $to, $extra) = @_;
6054         $from = 0 unless defined $from;
6055         $to = $#{$headlist} if (!defined $to || $#{$headlist} < $to);
6056
6057         print "<table class=\"heads\">\n";
6058         my $alternate = 1;
6059         for (my $i = $from; $i <= $to; $i++) {
6060                 my $entry = $headlist->[$i];
6061                 my %ref = %$entry;
6062                 my $curr = defined $head_at && $ref{'id'} eq $head_at;
6063                 if ($alternate) {
6064                         print "<tr class=\"dark\">\n";
6065                 } else {
6066                         print "<tr class=\"light\">\n";
6067                 }
6068                 $alternate ^= 1;
6069                 print "<td><i>$ref{'age'}</i></td>\n" .
6070                       ($curr ? "<td class=\"current_head\">" : "<td>") .
6071                       $cgi->a({-href => href(action=>"shortlog", hash=>$ref{'fullname'}),
6072                                -class => "list name"},esc_html($ref{'name'})) .
6073                       "</td>\n" .
6074                       "<td class=\"link\">" .
6075                       $cgi->a({-href => href(action=>"shortlog", hash=>$ref{'fullname'})}, "shortlog") . " | " .
6076                       $cgi->a({-href => href(action=>"log", hash=>$ref{'fullname'})}, "log") . " | " .
6077                       $cgi->a({-href => href(action=>"tree", hash=>$ref{'fullname'}, hash_base=>$ref{'fullname'})}, "tree") .
6078                       "</td>\n" .
6079                       "</tr>";
6080         }
6081         if (defined $extra) {
6082                 print "<tr>\n" .
6083                       "<td colspan=\"3\">$extra</td>\n" .
6084                       "</tr>\n";
6085         }
6086         print "</table>\n";
6087 }
6088
6089 # Display a single remote block
6090 sub git_remote_block {
6091         my ($remote, $rdata, $limit, $head) = @_;
6092
6093         my $heads = $rdata->{'heads'};
6094         my $fetch = $rdata->{'fetch'};
6095         my $push = $rdata->{'push'};
6096
6097         my $urls_table = "<table class=\"projects_list\">\n" ;
6098
6099         if (defined $fetch) {
6100                 if ($fetch eq $push) {
6101                         $urls_table .= format_repo_url("URL", $fetch);
6102                 } else {
6103                         $urls_table .= format_repo_url("Fetch URL", $fetch);
6104                         $urls_table .= format_repo_url("Push URL", $push) if defined $push;
6105                 }
6106         } elsif (defined $push) {
6107                 $urls_table .= format_repo_url("Push URL", $push);
6108         } else {
6109                 $urls_table .= format_repo_url("", "No remote URL");
6110         }
6111
6112         $urls_table .= "</table>\n";
6113
6114         my $dots;
6115         if (defined $limit && $limit < @$heads) {
6116                 $dots = $cgi->a({-href => href(action=>"remotes", hash=>$remote)}, "...");
6117         }
6118
6119         print $urls_table;
6120         git_heads_body($heads, $head, 0, $limit, $dots);
6121 }
6122
6123 # Display a list of remote names with the respective fetch and push URLs
6124 sub git_remotes_list {
6125         my ($remotedata, $limit) = @_;
6126         print "<table class=\"heads\">\n";
6127         my $alternate = 1;
6128         my @remotes = sort keys %$remotedata;
6129
6130         my $limited = $limit && $limit < @remotes;
6131
6132         $#remotes = $limit - 1 if $limited;
6133
6134         while (my $remote = shift @remotes) {
6135                 my $rdata = $remotedata->{$remote};
6136                 my $fetch = $rdata->{'fetch'};
6137                 my $push = $rdata->{'push'};
6138                 if ($alternate) {
6139                         print "<tr class=\"dark\">\n";
6140                 } else {
6141                         print "<tr class=\"light\">\n";
6142                 }
6143                 $alternate ^= 1;
6144                 print "<td>" .
6145                       $cgi->a({-href=> href(action=>'remotes', hash=>$remote),
6146                                -class=> "list name"},esc_html($remote)) .
6147                       "</td>";
6148                 print "<td class=\"link\">" .
6149                       (defined $fetch ? $cgi->a({-href=> $fetch}, "fetch") : "fetch") .
6150                       " | " .
6151                       (defined $push ? $cgi->a({-href=> $push}, "push") : "push") .
6152                       "</td>";
6153
6154                 print "</tr>\n";
6155         }
6156
6157         if ($limited) {
6158                 print "<tr>\n" .
6159                       "<td colspan=\"3\">" .
6160                       $cgi->a({-href => href(action=>"remotes")}, "...") .
6161                       "</td>\n" . "</tr>\n";
6162         }
6163
6164         print "</table>";
6165 }
6166
6167 # Display remote heads grouped by remote, unless there are too many
6168 # remotes, in which case we only display the remote names
6169 sub git_remotes_body {
6170         my ($remotedata, $limit, $head) = @_;
6171         if ($limit and $limit < keys %$remotedata) {
6172                 git_remotes_list($remotedata, $limit);
6173         } else {
6174                 fill_remote_heads($remotedata);
6175                 while (my ($remote, $rdata) = each %$remotedata) {
6176                         git_print_section({-class=>"remote", -id=>$remote},
6177                                 ["remotes", $remote, $remote], sub {
6178                                         git_remote_block($remote, $rdata, $limit, $head);
6179                                 });
6180                 }
6181         }
6182 }
6183
6184 sub git_search_message {
6185         my %co = @_;
6186
6187         my $greptype;
6188         if ($searchtype eq 'commit') {
6189                 $greptype = "--grep=";
6190         } elsif ($searchtype eq 'author') {
6191                 $greptype = "--author=";
6192         } elsif ($searchtype eq 'committer') {
6193                 $greptype = "--committer=";
6194         }
6195         $greptype .= $searchtext;
6196         my @commitlist = parse_commits($hash, 101, (100 * $page), undef,
6197                                        $greptype, '--regexp-ignore-case',
6198                                        $search_use_regexp ? '--extended-regexp' : '--fixed-strings');
6199
6200         my $paging_nav = '';
6201         if ($page > 0) {
6202                 $paging_nav .=
6203                         $cgi->a({-href => href(-replay=>1, page=>undef)},
6204                                 "first") .
6205                         " &sdot; " .
6206                         $cgi->a({-href => href(-replay=>1, page=>$page-1),
6207                                  -accesskey => "p", -title => "Alt-p"}, "prev");
6208         } else {
6209                 $paging_nav .= "first &sdot; prev";
6210         }
6211         my $next_link = '';
6212         if ($#commitlist >= 100) {
6213                 $next_link =
6214                         $cgi->a({-href => href(-replay=>1, page=>$page+1),
6215                                  -accesskey => "n", -title => "Alt-n"}, "next");
6216                 $paging_nav .= " &sdot; $next_link";
6217         } else {
6218                 $paging_nav .= " &sdot; next";
6219         }
6220
6221         git_header_html();
6222
6223         git_print_page_nav('','', $hash,$co{'tree'},$hash, $paging_nav);
6224         git_print_header_div('commit', esc_html($co{'title'}), $hash);
6225         if ($page == 0 && !@commitlist) {
6226                 print "<p>No match.</p>\n";
6227         } else {
6228                 git_search_grep_body(\@commitlist, 0, 99, $next_link);
6229         }
6230
6231         git_footer_html();
6232 }
6233
6234 sub git_search_changes {
6235         my %co = @_;
6236
6237         local $/ = "\n";
6238         open my $fd, '-|', git_cmd(), '--no-pager', 'log', @diff_opts,
6239                 '--pretty=format:%H', '--no-abbrev', '--raw', "-S$searchtext",
6240                 ($search_use_regexp ? '--pickaxe-regex' : ())
6241                         or die_error(500, "Open git-log failed");
6242
6243         git_header_html();
6244
6245         git_print_page_nav('','', $hash,$co{'tree'},$hash);
6246         git_print_header_div('commit', esc_html($co{'title'}), $hash);
6247
6248         print "<table class=\"pickaxe search\">\n";
6249         my $alternate = 1;
6250         undef %co;
6251         my @files;
6252         while (my $line = <$fd>) {
6253                 chomp $line;
6254                 next unless $line;
6255
6256                 my %set = parse_difftree_raw_line($line);
6257                 if (defined $set{'commit'}) {
6258                         # finish previous commit
6259                         if (%co) {
6260                                 print "</td>\n" .
6261                                       "<td class=\"link\">" .
6262                                       $cgi->a({-href => href(action=>"commit", hash=>$co{'id'})},
6263                                               "commit") .
6264                                       " | " .
6265                                       $cgi->a({-href => href(action=>"tree", hash=>$co{'tree'},
6266                                                              hash_base=>$co{'id'})},
6267                                               "tree") .
6268                                       "</td>\n" .
6269                                       "</tr>\n";
6270                         }
6271
6272                         if ($alternate) {
6273                                 print "<tr class=\"dark\">\n";
6274                         } else {
6275                                 print "<tr class=\"light\">\n";
6276                         }
6277                         $alternate ^= 1;
6278                         %co = parse_commit($set{'commit'});
6279                         my $author = chop_and_escape_str($co{'author_name'}, 15, 5);
6280                         print "<td title=\"$co{'age_string_age'}\"><i>$co{'age_string_date'}</i></td>\n" .
6281                               "<td><i>$author</i></td>\n" .
6282                               "<td>" .
6283                               $cgi->a({-href => href(action=>"commit", hash=>$co{'id'}),
6284                                       -class => "list subject"},
6285                                       chop_and_escape_str($co{'title'}, 50) . "<br/>");
6286                 } elsif (defined $set{'to_id'}) {
6287                         next if ($set{'to_id'} =~ m/^0{40}$/);
6288
6289                         print $cgi->a({-href => href(action=>"blob", hash_base=>$co{'id'},
6290                                                      hash=>$set{'to_id'}, file_name=>$set{'to_file'}),
6291                                       -class => "list"},
6292                                       "<span class=\"match\">" . esc_path($set{'file'}) . "</span>") .
6293                               "<br/>\n";
6294                 }
6295         }
6296         close $fd;
6297
6298         # finish last commit (warning: repetition!)
6299         if (%co) {
6300                 print "</td>\n" .
6301                       "<td class=\"link\">" .
6302                       $cgi->a({-href => href(action=>"commit", hash=>$co{'id'})},
6303                               "commit") .
6304                       " | " .
6305                       $cgi->a({-href => href(action=>"tree", hash=>$co{'tree'},
6306                                              hash_base=>$co{'id'})},
6307                               "tree") .
6308                       "</td>\n" .
6309                       "</tr>\n";
6310         }
6311
6312         print "</table>\n";
6313
6314         git_footer_html();
6315 }
6316
6317 sub git_search_files {
6318         my %co = @_;
6319
6320         local $/ = "\n";
6321         open my $fd, "-|", git_cmd(), 'grep', '-n', '-z',
6322                 $search_use_regexp ? ('-E', '-i') : '-F',
6323                 $searchtext, $co{'tree'}
6324                         or die_error(500, "Open git-grep failed");
6325
6326         git_header_html();
6327
6328         git_print_page_nav('','', $hash,$co{'tree'},$hash);
6329         git_print_header_div('commit', esc_html($co{'title'}), $hash);
6330
6331         print "<table class=\"grep_search\">\n";
6332         my $alternate = 1;
6333         my $matches = 0;
6334         my $lastfile = '';
6335         my $file_href;
6336         while (my $line = <$fd>) {
6337                 chomp $line;
6338                 my ($file, $lno, $ltext, $binary);
6339                 last if ($matches++ > 1000);
6340                 if ($line =~ /^Binary file (.+) matches$/) {
6341                         $file = $1;
6342                         $binary = 1;
6343                 } else {
6344                         ($file, $lno, $ltext) = split(/\0/, $line, 3);
6345                         $file =~ s/^$co{'tree'}://;
6346                 }
6347                 if ($file ne $lastfile) {
6348                         $lastfile and print "</td></tr>\n";
6349                         if ($alternate++) {
6350                                 print "<tr class=\"dark\">\n";
6351                         } else {
6352                                 print "<tr class=\"light\">\n";
6353                         }
6354                         $file_href = href(action=>"blob", hash_base=>$co{'id'},
6355                                           file_name=>$file);
6356                         print "<td class=\"list\">".
6357                                 $cgi->a({-href => $file_href, -class => "list"}, esc_path($file));
6358                         print "</td><td>\n";
6359                         $lastfile = $file;
6360                 }
6361                 if ($binary) {
6362                         print "<div class=\"binary\">Binary file</div>\n";
6363                 } else {
6364                         $ltext = untabify($ltext);
6365                         if ($ltext =~ m/^(.*)($search_regexp)(.*)$/i) {
6366                                 $ltext = esc_html($1, -nbsp=>1);
6367                                 $ltext .= '<span class="match">';
6368                                 $ltext .= esc_html($2, -nbsp=>1);
6369                                 $ltext .= '</span>';
6370                                 $ltext .= esc_html($3, -nbsp=>1);
6371                         } else {
6372                                 $ltext = esc_html($ltext, -nbsp=>1);
6373                         }
6374                         print "<div class=\"pre\">" .
6375                                 $cgi->a({-href => $file_href.'#l'.$lno,
6376                                         -class => "linenr"}, sprintf('%4i', $lno)) .
6377                                 ' ' .  $ltext . "</div>\n";
6378                 }
6379         }
6380         if ($lastfile) {
6381                 print "</td></tr>\n";
6382                 if ($matches > 1000) {
6383                         print "<div class=\"diff nodifferences\">Too many matches, listing trimmed</div>\n";
6384                 }
6385         } else {
6386                 print "<div class=\"diff nodifferences\">No matches found</div>\n";
6387         }
6388         close $fd;
6389
6390         print "</table>\n";
6391
6392         git_footer_html();
6393 }
6394
6395 sub git_search_grep_body {
6396         my ($commitlist, $from, $to, $extra) = @_;
6397         $from = 0 unless defined $from;
6398         $to = $#{$commitlist} if (!defined $to || $#{$commitlist} < $to);
6399
6400         print "<table class=\"commit_search\">\n";
6401         my $alternate = 1;
6402         for (my $i = $from; $i <= $to; $i++) {
6403                 my %co = %{$commitlist->[$i]};
6404                 if (!%co) {
6405                         next;
6406                 }
6407                 my $commit = $co{'id'};
6408                 if ($alternate) {
6409                         print "<tr class=\"dark\">\n";
6410                 } else {
6411                         print "<tr class=\"light\">\n";
6412                 }
6413                 $alternate ^= 1;
6414                 print "<td title=\"$co{'age_string_age'}\"><i>$co{'age_string_date'}</i></td>\n" .
6415                       format_author_html('td', \%co, 15, 5) .
6416                       "<td>" .
6417                       $cgi->a({-href => href(action=>"commit", hash=>$co{'id'}),
6418                                -class => "list subject"},
6419                               chop_and_escape_str($co{'title'}, 50) . "<br/>");
6420                 my $comment = $co{'comment'};
6421                 foreach my $line (@$comment) {
6422                         if ($line =~ m/^(.*?)($search_regexp)(.*)$/i) {
6423                                 my ($lead, $match, $trail) = ($1, $2, $3);
6424                                 $match = chop_str($match, 70, 5, 'center');
6425                                 my $contextlen = int((80 - length($match))/2);
6426                                 $contextlen = 30 if ($contextlen > 30);
6427                                 $lead  = chop_str($lead,  $contextlen, 10, 'left');
6428                                 $trail = chop_str($trail, $contextlen, 10, 'right');
6429
6430                                 $lead  = esc_html($lead);
6431                                 $match = esc_html($match);
6432                                 $trail = esc_html($trail);
6433
6434                                 print "$lead<span class=\"match\">$match</span>$trail<br />";
6435                         }
6436                 }
6437                 print "</td>\n" .
6438                       "<td class=\"link\">" .
6439                       $cgi->a({-href => href(action=>"commit", hash=>$co{'id'})}, "commit") .
6440                       " | " .
6441                       $cgi->a({-href => href(action=>"commitdiff", hash=>$co{'id'})}, "commitdiff") .
6442                       " | " .
6443                       $cgi->a({-href => href(action=>"tree", hash=>$co{'tree'}, hash_base=>$co{'id'})}, "tree");
6444                 print "</td>\n" .
6445                       "</tr>\n";
6446         }
6447         if (defined $extra) {
6448                 print "<tr>\n" .
6449                       "<td colspan=\"3\">$extra</td>\n" .
6450                       "</tr>\n";
6451         }
6452         print "</table>\n";
6453 }
6454
6455 ## ======================================================================
6456 ## ======================================================================
6457 ## actions
6458
6459 sub git_project_list_load {
6460         my $empty_list_ok = shift;
6461         my $order = $input_params{'order'};
6462         if (defined $order && $order !~ m/none|project|descr|owner|age/) {
6463                 die_error(400, "Unknown order parameter");
6464         }
6465
6466         my @list = git_get_projects_list($project_filter, $strict_export);
6467         if (!@list) {
6468                 die_error(404, "No projects found") unless $empty_list_ok;
6469         }
6470
6471         return (\@list, $order);
6472 }
6473
6474 sub git_frontpage {
6475         my ($projlist, $order);
6476         ($projlist, $order) = git_project_list_load(1) if not $frontpage_no_project_list;
6477         git_header_html();
6478         if (defined $home_text && -f $home_text) {
6479                 print "<div class=\"index_include\">\n";
6480                 insert_file($home_text);
6481                 print "</div>\n";
6482         }
6483         git_project_search_form($searchtext, $search_use_regexp);
6484         if (not $frontpage_no_project_list) {
6485                 git_project_list_body($projlist, $order);
6486         } else {
6487                 my $show_ctags = gitweb_check_feature('ctags');
6488                 if ($frontpage_no_project_list == 1 and $show_ctags) {
6489                         my @projects = git_get_projects_list($project_filter, $strict_export);
6490                         @projects = filter_forks_from_projects_list(\@projects) if gitweb_check_feature('forks');
6491                         @projects = fill_project_list_info(\@projects, 'ctags');
6492                         my $ctags = git_gather_all_ctags(\@projects);
6493                         my $cloud = git_populate_project_tagcloud($ctags, 'project_list');
6494                         print git_show_project_tagcloud($cloud, 64);
6495                 }
6496                 print "<p class=\"projectlist_link\">" .
6497                         $cgi->a({-href => href(action=>'project_list')}, "Browse all projects") .
6498                         "</p>\n";
6499         }
6500         git_footer_html();
6501 }
6502
6503 sub git_project_list {
6504         my ($projlist, $order) = git_project_list_load();
6505         git_header_html();
6506         git_project_search_form();
6507         git_project_list_body($projlist, $order);
6508         git_footer_html();
6509 }
6510
6511 sub git_forks {
6512         my $order = $input_params{'order'};
6513         if (defined $order && $order !~ m/none|project|descr|owner|age/) {
6514                 die_error(400, "Unknown order parameter");
6515         }
6516
6517         my $filter = $project;
6518         $filter =~ s/\.git$//;
6519         my @list = git_get_projects_list($filter);
6520         if (!@list) {
6521                 die_error(404, "No forks found");
6522         }
6523
6524         git_header_html();
6525         git_print_page_nav('','');
6526         git_print_header_div('summary', "$project forks");
6527         git_project_list_body(\@list, $order, undef, undef, undef, undef, 'forks');
6528         git_footer_html();
6529 }
6530
6531 sub git_project_index {
6532         my @projects = git_get_projects_list($project_filter, $strict_export);
6533         if (!@projects) {
6534                 die_error(404, "No projects found");
6535         }
6536
6537         print $cgi->header(
6538                 -type => 'text/plain',
6539                 -charset => 'utf-8',
6540                 -content_disposition => 'inline; filename="index.aux"');
6541
6542         foreach my $pr (@projects) {
6543                 if (!exists $pr->{'owner'}) {
6544                         $pr->{'owner'} = git_get_project_owner("$pr->{'path'}");
6545                 }
6546
6547                 my ($path, $owner) = ($pr->{'path'}, $pr->{'owner'});
6548                 # quote as in CGI::Util::encode, but keep the slash, and use '+' for ' '
6549                 $path  =~ s/([^a-zA-Z0-9_.\-\/ ])/sprintf("%%%02X", ord($1))/eg;
6550                 $owner =~ s/([^a-zA-Z0-9_.\-\/ ])/sprintf("%%%02X", ord($1))/eg;
6551                 $path  =~ s/ /\+/g;
6552                 $owner =~ s/ /\+/g;
6553
6554                 print "$path $owner\n";
6555         }
6556 }
6557
6558 sub git_summary {
6559         my $descr = git_get_project_description($project) || "none";
6560         my %co = parse_commit("HEAD");
6561         my %cd = %co ? parse_date($co{'committer_epoch'}, $co{'committer_tz'}) : ();
6562         my $head = $co{'id'};
6563         my $remote_heads = gitweb_check_feature('remote_heads');
6564
6565         my $owner = git_get_project_owner($project);
6566
6567         my $refs = git_get_references();
6568         # These get_*_list functions return one more to allow us to see if
6569         # there are more ...
6570         my @taglist  = git_get_tags_list(16);
6571         my @headlist = git_get_heads_list(16);
6572         my %remotedata = $remote_heads ? git_get_remotes_list() : ();
6573         my @forklist;
6574         my $check_forks = gitweb_check_feature('forks');
6575
6576         if ($check_forks) {
6577                 # find forks of a project
6578                 my $filter = $project;
6579                 $filter =~ s/\.git$//;
6580                 @forklist = git_get_projects_list($filter);
6581                 # filter out forks of forks
6582                 @forklist = filter_forks_from_projects_list(\@forklist)
6583                         if (@forklist);
6584         }
6585
6586         git_header_html();
6587         git_print_page_nav('summary','', $head);
6588
6589         print "<div class=\"title\">&nbsp;</div>\n";
6590         print "<table class=\"projects_list\">\n" .
6591               "<tr id=\"metadata_desc\"><td>description</td><td>" . esc_html($descr) . "</td></tr>\n";
6592         if ($owner and not $omit_owner) {
6593                 print  "<tr id=\"metadata_owner\"><td>owner</td><td>" . esc_html($owner) . "</td></tr>\n";
6594         }
6595         if (defined $cd{'rfc2822'}) {
6596                 print "<tr id=\"metadata_lchange\"><td>last change</td>" .
6597                       "<td>".format_timestamp_html(\%cd)."</td></tr>\n";
6598         }
6599
6600         # use per project git URL list in $projectroot/$project/cloneurl
6601         # or make project git URL from git base URL and project name
6602         my $url_tag = "URL";
6603         my @url_list = git_get_project_url_list($project);
6604         @url_list = map { "$_/$project" } @git_base_url_list unless @url_list;
6605         foreach my $git_url (@url_list) {
6606                 next unless $git_url;
6607                 print format_repo_url($url_tag, $git_url);
6608                 $url_tag = "";
6609         }
6610
6611         # Tag cloud
6612         my $show_ctags = gitweb_check_feature('ctags');
6613         if ($show_ctags) {
6614                 my $ctags = git_get_project_ctags($project);
6615                 if (%$ctags) {
6616                         # without ability to add tags, don't show if there are none
6617                         my $cloud = git_populate_project_tagcloud($ctags, 'project_list');
6618                         print "<tr id=\"metadata_ctags\">" .
6619                               "<td>Content tags:<br />";
6620                         print "</td>\n<td>" unless %$ctags;
6621                         print "<form action=\"$show_ctags\" method=\"post\">" .
6622                               "<input type=\"hidden\" name=\"p\" value=\"$project\"/>" .
6623                               "Add: <input type=\"text\" name=\"t\" size=\"10\" /></form>"
6624                               unless $show_ctags =~ /^\d+$/;
6625                         print "</td>\n<td>" if %$ctags;
6626                         print git_show_project_tagcloud($cloud, 48)."</td>" .
6627                               "</tr>\n";
6628                 }
6629         }
6630
6631         print "</table>\n";
6632
6633         # If XSS prevention is on, we don't include README.html.
6634         # TODO: Allow a readme in some safe format.
6635         if (!$prevent_xss && -s "$projectroot/$project/README.html") {
6636                 print "<div class=\"title\">readme</div>\n" .
6637                       "<div class=\"readme\">\n";
6638                 insert_file("$projectroot/$project/README.html");
6639                 print "\n</div>\n"; # class="readme"
6640         }
6641
6642         # we need to request one more than 16 (0..15) to check if
6643         # those 16 are all
6644         my @commitlist = $head ? parse_commits($head, 17) : ();
6645         if (@commitlist) {
6646                 git_print_header_div('shortlog');
6647                 git_shortlog_body(\@commitlist, 0, 15, $refs,
6648                                   $#commitlist <=  15 ? undef :
6649                                   $cgi->a({-href => href(action=>"shortlog")}, "..."));
6650         }
6651
6652         if (@taglist) {
6653                 git_print_header_div('tags');
6654                 git_tags_body(\@taglist, 0, 15,
6655                               $#taglist <=  15 ? undef :
6656                               $cgi->a({-href => href(action=>"tags")}, "..."));
6657         }
6658
6659         if (@headlist) {
6660                 git_print_header_div('heads');
6661                 git_heads_body(\@headlist, $head, 0, 15,
6662                                $#headlist <= 15 ? undef :
6663                                $cgi->a({-href => href(action=>"heads")}, "..."));
6664         }
6665
6666         if (%remotedata) {
6667                 git_print_header_div('remotes');
6668                 git_remotes_body(\%remotedata, 15, $head);
6669         }
6670
6671         if (@forklist) {
6672                 git_print_header_div('forks');
6673                 git_project_list_body(\@forklist, 'age', 0, 15,
6674                                       $#forklist <= 15 ? undef :
6675                                       $cgi->a({-href => href(action=>"forks")}, "..."),
6676                                       'no_header', 'forks');
6677         }
6678
6679         git_footer_html();
6680 }
6681
6682 sub git_tag {
6683         my %tag = parse_tag($hash);
6684
6685         if (! %tag) {
6686                 die_error(404, "Unknown tag object");
6687         }
6688
6689         my $head = git_get_head_hash($project);
6690         git_header_html();
6691         git_print_page_nav('','', $head,undef,$head);
6692         git_print_header_div('commit', esc_html($tag{'name'}), $hash);
6693         print "<div class=\"title_text\">\n" .
6694               "<table class=\"object_header\">\n" .
6695               "<tr>\n" .
6696               "<td>object</td>\n" .
6697               "<td>" . $cgi->a({-class => "list", -href => href(action=>$tag{'type'}, hash=>$tag{'object'})},
6698                                $tag{'object'}) . "</td>\n" .
6699               "<td class=\"link\">" . $cgi->a({-href => href(action=>$tag{'type'}, hash=>$tag{'object'})},
6700                                               $tag{'type'}) . "</td>\n" .
6701               "</tr>\n";
6702         if (defined($tag{'author'})) {
6703                 git_print_authorship_rows(\%tag, 'author');
6704         }
6705         print "</table>\n\n" .
6706               "</div>\n";
6707         print "<div class=\"page_body\">";
6708         my $comment = $tag{'comment'};
6709         foreach my $line (@$comment) {
6710                 chomp $line;
6711                 print esc_html($line, -nbsp=>1) . "<br/>\n";
6712         }
6713         print "</div>\n";
6714         git_footer_html();
6715 }
6716
6717 sub git_blame_common {
6718         my $format = shift || 'porcelain';
6719         if ($format eq 'porcelain' && $input_params{'javascript'}) {
6720                 $format = 'incremental';
6721                 $action = 'blame_incremental'; # for page title etc
6722         }
6723
6724         # permissions
6725         gitweb_check_feature('blame')
6726                 or die_error(403, "Blame view not allowed");
6727
6728         # error checking
6729         die_error(400, "No file name given") unless $file_name;
6730         $hash_base ||= git_get_head_hash($project);
6731         die_error(404, "Couldn't find base commit") unless $hash_base;
6732         my %co = parse_commit($hash_base)
6733                 or die_error(404, "Commit not found");
6734         my $ftype = "blob";
6735         if (!defined $hash) {
6736                 $hash = git_get_hash_by_path($hash_base, $file_name, "blob")
6737                         or die_error(404, "Error looking up file");
6738         } else {
6739                 $ftype = git_get_type($hash);
6740                 if ($ftype !~ "blob") {
6741                         die_error(400, "Object is not a blob");
6742                 }
6743         }
6744
6745         my $fd;
6746         if ($format eq 'incremental') {
6747                 # get file contents (as base)
6748                 open $fd, "-|", git_cmd(), 'cat-file', 'blob', $hash
6749                         or die_error(500, "Open git-cat-file failed");
6750         } elsif ($format eq 'data') {
6751                 # run git-blame --incremental
6752                 open $fd, "-|", git_cmd(), "blame", "--incremental",
6753                         $hash_base, "--", $file_name
6754                         or die_error(500, "Open git-blame --incremental failed");
6755         } else {
6756                 # run git-blame --porcelain
6757                 open $fd, "-|", git_cmd(), "blame", '-p',
6758                         $hash_base, '--', $file_name
6759                         or die_error(500, "Open git-blame --porcelain failed");
6760         }
6761         binmode $fd, ':utf8';
6762
6763         # incremental blame data returns early
6764         if ($format eq 'data') {
6765                 print $cgi->header(
6766                         -type=>"text/plain", -charset => "utf-8",
6767                         -status=> "200 OK");
6768                 local $| = 1; # output autoflush
6769                 while (my $line = <$fd>) {
6770                         print to_utf8($line);
6771                 }
6772                 close $fd
6773                         or print "ERROR $!\n";
6774
6775                 print 'END';
6776                 if (defined $t0 && gitweb_check_feature('timed')) {
6777                         print ' '.
6778                               tv_interval($t0, [ gettimeofday() ]).
6779                               ' '.$number_of_git_cmds;
6780                 }
6781                 print "\n";
6782
6783                 return;
6784         }
6785
6786         # page header
6787         git_header_html();
6788         my $formats_nav =
6789                 $cgi->a({-href => href(action=>"blob", -replay=>1)},
6790                         "blob") .
6791                 " | ";
6792         if ($format eq 'incremental') {
6793                 $formats_nav .=
6794                         $cgi->a({-href => href(action=>"blame", javascript=>0, -replay=>1)},
6795                                 "blame") . " (non-incremental)";
6796         } else {
6797                 $formats_nav .=
6798                         $cgi->a({-href => href(action=>"blame_incremental", -replay=>1)},
6799                                 "blame") . " (incremental)";
6800         }
6801         $formats_nav .=
6802                 " | " .
6803                 $cgi->a({-href => href(action=>"history", -replay=>1)},
6804                         "history") .
6805                 " | " .
6806                 $cgi->a({-href => href(action=>$action, file_name=>$file_name)},
6807                         "HEAD");
6808         git_print_page_nav('','', $hash_base,$co{'tree'},$hash_base, $formats_nav);
6809         git_print_header_div('commit', esc_html($co{'title'}), $hash_base);
6810         git_print_page_path($file_name, $ftype, $hash_base);
6811
6812         # page body
6813         if ($format eq 'incremental') {
6814                 print "<noscript>\n<div class=\"error\"><center><b>\n".
6815                       "This page requires JavaScript to run.\n Use ".
6816                       $cgi->a({-href => href(action=>'blame',javascript=>0,-replay=>1)},
6817                               'this page').
6818                       " instead.\n".
6819                       "</b></center></div>\n</noscript>\n";
6820
6821                 print qq!<div id="progress_bar" style="width: 100%; background-color: yellow"></div>\n!;
6822         }
6823
6824         print qq!<div class="page_body">\n!;
6825         print qq!<div id="progress_info">... / ...</div>\n!
6826                 if ($format eq 'incremental');
6827         print qq!<table id="blame_table" class="blame" width="100%">\n!.
6828               #qq!<col width="5.5em" /><col width="2.5em" /><col width="*" />\n!.
6829               qq!<thead>\n!.
6830               qq!<tr><th>Commit</th><th>Line</th><th>Data</th></tr>\n!.
6831               qq!</thead>\n!.
6832               qq!<tbody>\n!;
6833
6834         my @rev_color = qw(light dark);
6835         my $num_colors = scalar(@rev_color);
6836         my $current_color = 0;
6837
6838         if ($format eq 'incremental') {
6839                 my $color_class = $rev_color[$current_color];
6840
6841                 #contents of a file
6842                 my $linenr = 0;
6843         LINE:
6844                 while (my $line = <$fd>) {
6845                         chomp $line;
6846                         $linenr++;
6847
6848                         print qq!<tr id="l$linenr" class="$color_class">!.
6849                               qq!<td class="sha1"><a href=""> </a></td>!.
6850                               qq!<td class="linenr">!.
6851                               qq!<a class="linenr" href="">$linenr</a></td>!;
6852                         print qq!<td class="pre">! . esc_html($line) . "</td>\n";
6853                         print qq!</tr>\n!;
6854                 }
6855
6856         } else { # porcelain, i.e. ordinary blame
6857                 my %metainfo = (); # saves information about commits
6858
6859                 # blame data
6860         LINE:
6861                 while (my $line = <$fd>) {
6862                         chomp $line;
6863                         # the header: <SHA-1> <src lineno> <dst lineno> [<lines in group>]
6864                         # no <lines in group> for subsequent lines in group of lines
6865                         my ($full_rev, $orig_lineno, $lineno, $group_size) =
6866                            ($line =~ /^([0-9a-f]{40}) (\d+) (\d+)(?: (\d+))?$/);
6867                         if (!exists $metainfo{$full_rev}) {
6868                                 $metainfo{$full_rev} = { 'nprevious' => 0 };
6869                         }
6870                         my $meta = $metainfo{$full_rev};
6871                         my $data;
6872                         while ($data = <$fd>) {
6873                                 chomp $data;
6874                                 last if ($data =~ s/^\t//); # contents of line
6875                                 if ($data =~ /^(\S+)(?: (.*))?$/) {
6876                                         $meta->{$1} = $2 unless exists $meta->{$1};
6877                                 }
6878                                 if ($data =~ /^previous /) {
6879                                         $meta->{'nprevious'}++;
6880                                 }
6881                         }
6882                         my $short_rev = substr($full_rev, 0, 8);
6883                         my $author = $meta->{'author'};
6884                         my %date =
6885                                 parse_date($meta->{'author-time'}, $meta->{'author-tz'});
6886                         my $date = $date{'iso-tz'};
6887                         if ($group_size) {
6888                                 $current_color = ($current_color + 1) % $num_colors;
6889                         }
6890                         my $tr_class = $rev_color[$current_color];
6891                         $tr_class .= ' boundary' if (exists $meta->{'boundary'});
6892                         $tr_class .= ' no-previous' if ($meta->{'nprevious'} == 0);
6893                         $tr_class .= ' multiple-previous' if ($meta->{'nprevious'} > 1);
6894                         print "<tr id=\"l$lineno\" class=\"$tr_class\">\n";
6895                         if ($group_size) {
6896                                 print "<td class=\"sha1\"";
6897                                 print " title=\"". esc_html($author) . ", $date\"";
6898                                 print " rowspan=\"$group_size\"" if ($group_size > 1);
6899                                 print ">";
6900                                 print $cgi->a({-href => href(action=>"commit",
6901                                                              hash=>$full_rev,
6902                                                              file_name=>$file_name)},
6903                                               esc_html($short_rev));
6904                                 if ($group_size >= 2) {
6905                                         my @author_initials = ($author =~ /\b([[:upper:]])\B/g);
6906                                         if (@author_initials) {
6907                                                 print "<br />" .
6908                                                       esc_html(join('', @author_initials));
6909                                                 #           or join('.', ...)
6910                                         }
6911                                 }
6912                                 print "</td>\n";
6913                         }
6914                         # 'previous' <sha1 of parent commit> <filename at commit>
6915                         if (exists $meta->{'previous'} &&
6916                             $meta->{'previous'} =~ /^([a-fA-F0-9]{40}) (.*)$/) {
6917                                 $meta->{'parent'} = $1;
6918                                 $meta->{'file_parent'} = unquote($2);
6919                         }
6920                         my $linenr_commit =
6921                                 exists($meta->{'parent'}) ?
6922                                 $meta->{'parent'} : $full_rev;
6923                         my $linenr_filename =
6924                                 exists($meta->{'file_parent'}) ?
6925                                 $meta->{'file_parent'} : unquote($meta->{'filename'});
6926                         my $blamed = href(action => 'blame',
6927                                           file_name => $linenr_filename,
6928                                           hash_base => $linenr_commit);
6929                         print "<td class=\"linenr\">";
6930                         print $cgi->a({ -href => "$blamed#l$orig_lineno",
6931                                         -class => "linenr" },
6932                                       esc_html($lineno));
6933                         print "</td>";
6934                         print "<td class=\"pre\">" . esc_html($data) . "</td>\n";
6935                         print "</tr>\n";
6936                 } # end while
6937
6938         }
6939
6940         # footer
6941         print "</tbody>\n".
6942               "</table>\n"; # class="blame"
6943         print "</div>\n";   # class="blame_body"
6944         close $fd
6945                 or print "Reading blob failed\n";
6946
6947         git_footer_html();
6948 }
6949
6950 sub git_blame {
6951         git_blame_common();
6952 }
6953
6954 sub git_blame_incremental {
6955         git_blame_common('incremental');
6956 }
6957
6958 sub git_blame_data {
6959         git_blame_common('data');
6960 }
6961
6962 sub git_tags {
6963         my $head = git_get_head_hash($project);
6964         git_header_html();
6965         git_print_page_nav('','', $head,undef,$head,format_ref_views('tags'));
6966         git_print_header_div('summary', $project);
6967
6968         my @tagslist = git_get_tags_list();
6969         if (@tagslist) {
6970                 git_tags_body(\@tagslist);
6971         }
6972         git_footer_html();
6973 }
6974
6975 sub git_heads {
6976         my $head = git_get_head_hash($project);
6977         git_header_html();
6978         git_print_page_nav('','', $head,undef,$head,format_ref_views('heads'));
6979         git_print_header_div('summary', $project);
6980
6981         my @headslist = git_get_heads_list();
6982         if (@headslist) {
6983                 git_heads_body(\@headslist, $head);
6984         }
6985         git_footer_html();
6986 }
6987
6988 # used both for single remote view and for list of all the remotes
6989 sub git_remotes {
6990         gitweb_check_feature('remote_heads')
6991                 or die_error(403, "Remote heads view is disabled");
6992
6993         my $head = git_get_head_hash($project);
6994         my $remote = $input_params{'hash'};
6995
6996         my $remotedata = git_get_remotes_list($remote);
6997         die_error(500, "Unable to get remote information") unless defined $remotedata;
6998
6999         unless (%$remotedata) {
7000                 die_error(404, defined $remote ?
7001                         "Remote $remote not found" :
7002                         "No remotes found");
7003         }
7004
7005         git_header_html(undef, undef, -action_extra => $remote);
7006         git_print_page_nav('', '',  $head, undef, $head,
7007                 format_ref_views($remote ? '' : 'remotes'));
7008
7009         fill_remote_heads($remotedata);
7010         if (defined $remote) {
7011                 git_print_header_div('remotes', "$remote remote for $project");
7012                 git_remote_block($remote, $remotedata->{$remote}, undef, $head);
7013         } else {
7014                 git_print_header_div('summary', "$project remotes");
7015                 git_remotes_body($remotedata, undef, $head);
7016         }
7017
7018         git_footer_html();
7019 }
7020
7021 sub git_blob_plain {
7022         my $type = shift;
7023         my $expires;
7024
7025         if (!defined $hash) {
7026                 if (defined $file_name) {
7027                         my $base = $hash_base || git_get_head_hash($project);
7028                         $hash = git_get_hash_by_path($base, $file_name, "blob")
7029                                 or die_error(404, "Cannot find file");
7030                 } else {
7031                         die_error(400, "No file name defined");
7032                 }
7033         } elsif ($hash =~ m/^[0-9a-fA-F]{40}$/) {
7034                 # blobs defined by non-textual hash id's can be cached
7035                 $expires = "+1d";
7036         }
7037
7038         open my $fd, "-|", git_cmd(), "cat-file", "blob", $hash
7039                 or die_error(500, "Open git-cat-file blob '$hash' failed");
7040
7041         # content-type (can include charset)
7042         $type = blob_contenttype($fd, $file_name, $type);
7043
7044         # "save as" filename, even when no $file_name is given
7045         my $save_as = "$hash";
7046         if (defined $file_name) {
7047                 $save_as = $file_name;
7048         } elsif ($type =~ m/^text\//) {
7049                 $save_as .= '.txt';
7050         }
7051
7052         # With XSS prevention on, blobs of all types except a few known safe
7053         # ones are served with "Content-Disposition: attachment" to make sure
7054         # they don't run in our security domain.  For certain image types,
7055         # blob view writes an <img> tag referring to blob_plain view, and we
7056         # want to be sure not to break that by serving the image as an
7057         # attachment (though Firefox 3 doesn't seem to care).
7058         my $sandbox = $prevent_xss &&
7059                 $type !~ m!^(?:text/[a-z]+|image/(?:gif|png|jpeg))(?:[ ;]|$)!;
7060
7061         # serve text/* as text/plain
7062         if ($prevent_xss &&
7063             ($type =~ m!^text/[a-z]+\b(.*)$! ||
7064              ($type =~ m!^[a-z]+/[a-z]\+xml\b(.*)$! && -T $fd))) {
7065                 my $rest = $1;
7066                 $rest = defined $rest ? $rest : '';
7067                 $type = "text/plain$rest";
7068         }
7069
7070         print $cgi->header(
7071                 -type => $type,
7072                 -expires => $expires,
7073                 -content_disposition =>
7074                         ($sandbox ? 'attachment' : 'inline')
7075                         . '; filename="' . $save_as . '"');
7076         local $/ = undef;
7077         binmode STDOUT, ':raw';
7078         print <$fd>;
7079         binmode STDOUT, ':utf8'; # as set at the beginning of gitweb.cgi
7080         close $fd;
7081 }
7082
7083 sub git_blob {
7084         my $expires;
7085
7086         if (!defined $hash) {
7087                 if (defined $file_name) {
7088                         my $base = $hash_base || git_get_head_hash($project);
7089                         $hash = git_get_hash_by_path($base, $file_name, "blob")
7090                                 or die_error(404, "Cannot find file");
7091                 } else {
7092                         die_error(400, "No file name defined");
7093                 }
7094         } elsif ($hash =~ m/^[0-9a-fA-F]{40}$/) {
7095                 # blobs defined by non-textual hash id's can be cached
7096                 $expires = "+1d";
7097         }
7098
7099         my $have_blame = gitweb_check_feature('blame');
7100         open my $fd, "-|", git_cmd(), "cat-file", "blob", $hash
7101                 or die_error(500, "Couldn't cat $file_name, $hash");
7102         my $mimetype = blob_mimetype($fd, $file_name);
7103         # use 'blob_plain' (aka 'raw') view for files that cannot be displayed
7104         if ($mimetype !~ m!^(?:text/|image/(?:gif|png|jpeg)$)! && -B $fd) {
7105                 close $fd;
7106                 return git_blob_plain($mimetype);
7107         }
7108         # we can have blame only for text/* mimetype
7109         $have_blame &&= ($mimetype =~ m!^text/!);
7110
7111         my $highlight = gitweb_check_feature('highlight');
7112         my $syntax = guess_file_syntax($highlight, $mimetype, $file_name);
7113         $fd = run_highlighter($fd, $highlight, $syntax)
7114                 if $syntax;
7115
7116         git_header_html(undef, $expires);
7117         my $formats_nav = '';
7118         if (defined $hash_base && (my %co = parse_commit($hash_base))) {
7119                 if (defined $file_name) {
7120                         if ($have_blame) {
7121                                 $formats_nav .=
7122                                         $cgi->a({-href => href(action=>"blame", -replay=>1)},
7123                                                 "blame") .
7124                                         " | ";
7125                         }
7126                         $formats_nav .=
7127                                 $cgi->a({-href => href(action=>"history", -replay=>1)},
7128                                         "history") .
7129                                 " | " .
7130                                 $cgi->a({-href => href(action=>"blob_plain", -replay=>1)},
7131                                         "raw") .
7132                                 " | " .
7133                                 $cgi->a({-href => href(action=>"blob",
7134                                                        hash_base=>"HEAD", file_name=>$file_name)},
7135                                         "HEAD");
7136                 } else {
7137                         $formats_nav .=
7138                                 $cgi->a({-href => href(action=>"blob_plain", -replay=>1)},
7139                                         "raw");
7140                 }
7141                 git_print_page_nav('','', $hash_base,$co{'tree'},$hash_base, $formats_nav);
7142                 git_print_header_div('commit', esc_html($co{'title'}), $hash_base);
7143         } else {
7144                 print "<div class=\"page_nav\">\n" .
7145                       "<br/><br/></div>\n" .
7146                       "<div class=\"title\">".esc_html($hash)."</div>\n";
7147         }
7148         git_print_page_path($file_name, "blob", $hash_base);
7149         print "<div class=\"page_body\">\n";
7150         if ($mimetype =~ m!^image/!) {
7151                 print qq!<img class="blob" type="!.esc_attr($mimetype).qq!"!;
7152                 if ($file_name) {
7153                         print qq! alt="!.esc_attr($file_name).qq!" title="!.esc_attr($file_name).qq!"!;
7154                 }
7155                 print qq! src="! .
7156                       href(action=>"blob_plain", hash=>$hash,
7157                            hash_base=>$hash_base, file_name=>$file_name) .
7158                       qq!" />\n!;
7159         } else {
7160                 my $nr;
7161                 while (my $line = <$fd>) {
7162                         chomp $line;
7163                         $nr++;
7164                         $line = untabify($line);
7165                         printf qq!<div class="pre"><a id="l%i" href="%s#l%i" class="linenr">%4i</a> %s</div>\n!,
7166                                $nr, esc_attr(href(-replay => 1)), $nr, $nr,
7167                                $syntax ? sanitize($line) : esc_html($line, -nbsp=>1);
7168                 }
7169         }
7170         close $fd
7171                 or print "Reading blob failed.\n";
7172         print "</div>";
7173         git_footer_html();
7174 }
7175
7176 sub git_tree {
7177         if (!defined $hash_base) {
7178                 $hash_base = "HEAD";
7179         }
7180         if (!defined $hash) {
7181                 if (defined $file_name) {
7182                         $hash = git_get_hash_by_path($hash_base, $file_name, "tree");
7183                 } else {
7184                         $hash = $hash_base;
7185                 }
7186         }
7187         die_error(404, "No such tree") unless defined($hash);
7188
7189         my $show_sizes = gitweb_check_feature('show-sizes');
7190         my $have_blame = gitweb_check_feature('blame');
7191
7192         my @entries = ();
7193         {
7194                 local $/ = "\0";
7195                 open my $fd, "-|", git_cmd(), "ls-tree", '-z',
7196                         ($show_sizes ? '-l' : ()), @extra_options, $hash
7197                         or die_error(500, "Open git-ls-tree failed");
7198                 @entries = map { chomp; $_ } <$fd>;
7199                 close $fd
7200                         or die_error(404, "Reading tree failed");
7201         }
7202
7203         my $refs = git_get_references();
7204         my $ref = format_ref_marker($refs, $hash_base);
7205         git_header_html();
7206         my $basedir = '';
7207         if (defined $hash_base && (my %co = parse_commit($hash_base))) {
7208                 my @views_nav = ();
7209                 if (defined $file_name) {
7210                         push @views_nav,
7211                                 $cgi->a({-href => href(action=>"history", -replay=>1)},
7212                                         "history"),
7213                                 $cgi->a({-href => href(action=>"tree",
7214                                                        hash_base=>"HEAD", file_name=>$file_name)},
7215                                         "HEAD"),
7216                 }
7217                 my $snapshot_links = format_snapshot_links($hash);
7218                 if (defined $snapshot_links) {
7219                         # FIXME: Should be available when we have no hash base as well.
7220                         push @views_nav, $snapshot_links;
7221                 }
7222                 git_print_page_nav('tree','', $hash_base, undef, undef,
7223                                    join(' | ', @views_nav));
7224                 git_print_header_div('commit', esc_html($co{'title'}) . $ref, $hash_base);
7225         } else {
7226                 undef $hash_base;
7227                 print "<div class=\"page_nav\">\n";
7228                 print "<br/><br/></div>\n";
7229                 print "<div class=\"title\">".esc_html($hash)."</div>\n";
7230         }
7231         if (defined $file_name) {
7232                 $basedir = $file_name;
7233                 if ($basedir ne '' && substr($basedir, -1) ne '/') {
7234                         $basedir .= '/';
7235                 }
7236                 git_print_page_path($file_name, 'tree', $hash_base);
7237         }
7238         print "<div class=\"page_body\">\n";
7239         print "<table class=\"tree\">\n";
7240         my $alternate = 1;
7241         # '..' (top directory) link if possible
7242         if (defined $hash_base &&
7243             defined $file_name && $file_name =~ m![^/]+$!) {
7244                 if ($alternate) {
7245                         print "<tr class=\"dark\">\n";
7246                 } else {
7247                         print "<tr class=\"light\">\n";
7248                 }
7249                 $alternate ^= 1;
7250
7251                 my $up = $file_name;
7252                 $up =~ s!/?[^/]+$!!;
7253                 undef $up unless $up;
7254                 # based on git_print_tree_entry
7255                 print '<td class="mode">' . mode_str('040000') . "</td>\n";
7256                 print '<td class="size">&nbsp;</td>'."\n" if $show_sizes;
7257                 print '<td class="list">';
7258                 print $cgi->a({-href => href(action=>"tree",
7259                                              hash_base=>$hash_base,
7260                                              file_name=>$up)},
7261                               "..");
7262                 print "</td>\n";
7263                 print "<td class=\"link\"></td>\n";
7264
7265                 print "</tr>\n";
7266         }
7267         foreach my $line (@entries) {
7268                 my %t = parse_ls_tree_line($line, -z => 1, -l => $show_sizes);
7269
7270                 if ($alternate) {
7271                         print "<tr class=\"dark\">\n";
7272                 } else {
7273                         print "<tr class=\"light\">\n";
7274                 }
7275                 $alternate ^= 1;
7276
7277                 git_print_tree_entry(\%t, $basedir, $hash_base, $have_blame);
7278
7279                 print "</tr>\n";
7280         }
7281         print "</table>\n" .
7282               "</div>";
7283         git_footer_html();
7284 }
7285
7286 sub sanitize_for_filename {
7287     my $name = shift;
7288
7289     $name =~ s!/!-!g;
7290     $name =~ s/[^[:alnum:]_.-]//g;
7291
7292     return $name;
7293 }
7294
7295 sub snapshot_name {
7296         my ($project, $hash) = @_;
7297
7298         # path/to/project.git  -> project
7299         # path/to/project/.git -> project
7300         my $name = to_utf8($project);
7301         $name =~ s,([^/])/*\.git$,$1,;
7302         $name = sanitize_for_filename(basename($name));
7303
7304         my $ver = $hash;
7305         if ($hash =~ /^[0-9a-fA-F]+$/) {
7306                 # shorten SHA-1 hash
7307                 my $full_hash = git_get_full_hash($project, $hash);
7308                 if ($full_hash =~ /^$hash/ && length($hash) > 7) {
7309                         $ver = git_get_short_hash($project, $hash);
7310                 }
7311         } elsif ($hash =~ m!^refs/tags/(.*)$!) {
7312                 # tags don't need shortened SHA-1 hash
7313                 $ver = $1;
7314         } else {
7315                 # branches and other need shortened SHA-1 hash
7316                 my $strip_refs = join '|', map { quotemeta } get_branch_refs();
7317                 if ($hash =~ m!^refs/($strip_refs|remotes)/(.*)$!) {
7318                         my $ref_dir = (defined $1) ? $1 : '';
7319                         $ver = $2;
7320
7321                         $ref_dir = sanitize_for_filename($ref_dir);
7322                         # for refs neither in heads nor remotes we want to
7323                         # add a ref dir to archive name
7324                         if ($ref_dir ne '' and $ref_dir ne 'heads' and $ref_dir ne 'remotes') {
7325                                 $ver = $ref_dir . '-' . $ver;
7326                         }
7327                 }
7328                 $ver .= '-' . git_get_short_hash($project, $hash);
7329         }
7330         # special case of sanitization for filename - we change
7331         # slashes to dots instead of dashes
7332         # in case of hierarchical branch names
7333         $ver =~ s!/!.!g;
7334         $ver =~ s/[^[:alnum:]_.-]//g;
7335
7336         # name = project-version_string
7337         $name = "$name-$ver";
7338
7339         return wantarray ? ($name, $name) : $name;
7340 }
7341
7342 sub exit_if_unmodified_since {
7343         my ($latest_epoch) = @_;
7344         our $cgi;
7345
7346         my $if_modified = $cgi->http('IF_MODIFIED_SINCE');
7347         if (defined $if_modified) {
7348                 my $since;
7349                 if (eval { require HTTP::Date; 1; }) {
7350                         $since = HTTP::Date::str2time($if_modified);
7351                 } elsif (eval { require Time::ParseDate; 1; }) {
7352                         $since = Time::ParseDate::parsedate($if_modified, GMT => 1);
7353                 }
7354                 if (defined $since && $latest_epoch <= $since) {
7355                         my %latest_date = parse_date($latest_epoch);
7356                         print $cgi->header(
7357                                 -last_modified => $latest_date{'rfc2822'},
7358                                 -status => '304 Not Modified');
7359                         goto DONE_GITWEB;
7360                 }
7361         }
7362 }
7363
7364 sub git_snapshot {
7365         my $format = $input_params{'snapshot_format'};
7366         if (!@snapshot_fmts) {
7367                 die_error(403, "Snapshots not allowed");
7368         }
7369         # default to first supported snapshot format
7370         $format ||= $snapshot_fmts[0];
7371         if ($format !~ m/^[a-z0-9]+$/) {
7372                 die_error(400, "Invalid snapshot format parameter");
7373         } elsif (!exists($known_snapshot_formats{$format})) {
7374                 die_error(400, "Unknown snapshot format");
7375         } elsif ($known_snapshot_formats{$format}{'disabled'}) {
7376                 die_error(403, "Snapshot format not allowed");
7377         } elsif (!grep($_ eq $format, @snapshot_fmts)) {
7378                 die_error(403, "Unsupported snapshot format");
7379         }
7380
7381         my $type = git_get_type("$hash^{}");
7382         if (!$type) {
7383                 die_error(404, 'Object does not exist');
7384         }  elsif ($type eq 'blob') {
7385                 die_error(400, 'Object is not a tree-ish');
7386         }
7387
7388         my ($name, $prefix) = snapshot_name($project, $hash);
7389         my $filename = "$name$known_snapshot_formats{$format}{'suffix'}";
7390
7391         my %co = parse_commit($hash);
7392         exit_if_unmodified_since($co{'committer_epoch'}) if %co;
7393
7394         my $cmd = quote_command(
7395                 git_cmd(), 'archive',
7396                 "--format=$known_snapshot_formats{$format}{'format'}",
7397                 "--prefix=$prefix/", $hash);
7398         if (exists $known_snapshot_formats{$format}{'compressor'}) {
7399                 $cmd .= ' | ' . quote_command(@{$known_snapshot_formats{$format}{'compressor'}});
7400         }
7401
7402         $filename =~ s/(["\\])/\\$1/g;
7403         my %latest_date;
7404         if (%co) {
7405                 %latest_date = parse_date($co{'committer_epoch'}, $co{'committer_tz'});
7406         }
7407
7408         print $cgi->header(
7409                 -type => $known_snapshot_formats{$format}{'type'},
7410                 -content_disposition => 'inline; filename="' . $filename . '"',
7411                 %co ? (-last_modified => $latest_date{'rfc2822'}) : (),
7412                 -status => '200 OK');
7413
7414         open my $fd, "-|", $cmd
7415                 or die_error(500, "Execute git-archive failed");
7416         binmode STDOUT, ':raw';
7417         print <$fd>;
7418         binmode STDOUT, ':utf8'; # as set at the beginning of gitweb.cgi
7419         close $fd;
7420 }
7421
7422 sub git_log_generic {
7423         my ($fmt_name, $body_subr, $base, $parent, $file_name, $file_hash) = @_;
7424
7425         my $head = git_get_head_hash($project);
7426         if (!defined $base) {
7427                 $base = $head;
7428         }
7429         if (!defined $page) {
7430                 $page = 0;
7431         }
7432         my $refs = git_get_references();
7433
7434         my $commit_hash = $base;
7435         if (defined $parent) {
7436                 $commit_hash = "$parent..$base";
7437         }
7438         my @commitlist =
7439                 parse_commits($commit_hash, 101, (100 * $page),
7440                               defined $file_name ? ($file_name, "--full-history") : ());
7441
7442         my $ftype;
7443         if (!defined $file_hash && defined $file_name) {
7444                 # some commits could have deleted file in question,
7445                 # and not have it in tree, but one of them has to have it
7446                 for (my $i = 0; $i < @commitlist; $i++) {
7447                         $file_hash = git_get_hash_by_path($commitlist[$i]{'id'}, $file_name);
7448                         last if defined $file_hash;
7449                 }
7450         }
7451         if (defined $file_hash) {
7452                 $ftype = git_get_type($file_hash);
7453         }
7454         if (defined $file_name && !defined $ftype) {
7455                 die_error(500, "Unknown type of object");
7456         }
7457         my %co;
7458         if (defined $file_name) {
7459                 %co = parse_commit($base)
7460                         or die_error(404, "Unknown commit object");
7461         }
7462
7463
7464         my $paging_nav = format_paging_nav($fmt_name, $page, $#commitlist >= 100);
7465         my $next_link = '';
7466         if ($#commitlist >= 100) {
7467                 $next_link =
7468                         $cgi->a({-href => href(-replay=>1, page=>$page+1),
7469                                  -accesskey => "n", -title => "Alt-n"}, "next");
7470         }
7471         my $patch_max = gitweb_get_feature('patches');
7472         if ($patch_max && !defined $file_name) {
7473                 if ($patch_max < 0 || @commitlist <= $patch_max) {
7474                         $paging_nav .= " &sdot; " .
7475                                 $cgi->a({-href => href(action=>"patches", -replay=>1)},
7476                                         "patches");
7477                 }
7478         }
7479
7480         git_header_html();
7481         git_print_page_nav($fmt_name,'', $hash,$hash,$hash, $paging_nav);
7482         if (defined $file_name) {
7483                 git_print_header_div('commit', esc_html($co{'title'}), $base);
7484         } else {
7485                 git_print_header_div('summary', $project)
7486         }
7487         git_print_page_path($file_name, $ftype, $hash_base)
7488                 if (defined $file_name);
7489
7490         $body_subr->(\@commitlist, 0, 99, $refs, $next_link,
7491                      $file_name, $file_hash, $ftype);
7492
7493         git_footer_html();
7494 }
7495
7496 sub git_log {
7497         git_log_generic('log', \&git_log_body,
7498                         $hash, $hash_parent);
7499 }
7500
7501 sub git_commit {
7502         $hash ||= $hash_base || "HEAD";
7503         my %co = parse_commit($hash)
7504             or die_error(404, "Unknown commit object");
7505
7506         my $parent  = $co{'parent'};
7507         my $parents = $co{'parents'}; # listref
7508
7509         # we need to prepare $formats_nav before any parameter munging
7510         my $formats_nav;
7511         if (!defined $parent) {
7512                 # --root commitdiff
7513                 $formats_nav .= '(initial)';
7514         } elsif (@$parents == 1) {
7515                 # single parent commit
7516                 $formats_nav .=
7517                         '(parent: ' .
7518                         $cgi->a({-href => href(action=>"commit",
7519                                                hash=>$parent)},
7520                                 esc_html(substr($parent, 0, 7))) .
7521                         ')';
7522         } else {
7523                 # merge commit
7524                 $formats_nav .=
7525                         '(merge: ' .
7526                         join(' ', map {
7527                                 $cgi->a({-href => href(action=>"commit",
7528                                                        hash=>$_)},
7529                                         esc_html(substr($_, 0, 7)));
7530                         } @$parents ) .
7531                         ')';
7532         }
7533         if (gitweb_check_feature('patches') && @$parents <= 1) {
7534                 $formats_nav .= " | " .
7535                         $cgi->a({-href => href(action=>"patch", -replay=>1)},
7536                                 "patch");
7537         }
7538
7539         if (!defined $parent) {
7540                 $parent = "--root";
7541         }
7542         my @difftree;
7543         open my $fd, "-|", git_cmd(), "diff-tree", '-r', "--no-commit-id",
7544                 @diff_opts,
7545                 (@$parents <= 1 ? $parent : '-c'),
7546                 $hash, "--"
7547                 or die_error(500, "Open git-diff-tree failed");
7548         @difftree = map { chomp; $_ } <$fd>;
7549         close $fd or die_error(404, "Reading git-diff-tree failed");
7550
7551         # non-textual hash id's can be cached
7552         my $expires;
7553         if ($hash =~ m/^[0-9a-fA-F]{40}$/) {
7554                 $expires = "+1d";
7555         }
7556         my $refs = git_get_references();
7557         my $ref = format_ref_marker($refs, $co{'id'});
7558
7559         git_header_html(undef, $expires);
7560         git_print_page_nav('commit', '',
7561                            $hash, $co{'tree'}, $hash,
7562                            $formats_nav);
7563
7564         if (defined $co{'parent'}) {
7565                 git_print_header_div('commitdiff', esc_html($co{'title'}) . $ref, $hash);
7566         } else {
7567                 git_print_header_div('tree', esc_html($co{'title'}) . $ref, $co{'tree'}, $hash);
7568         }
7569         print "<div class=\"title_text\">\n" .
7570               "<table class=\"object_header\">\n";
7571         git_print_authorship_rows(\%co);
7572         print "<tr><td>commit</td><td class=\"sha1\">$co{'id'}</td></tr>\n";
7573         print "<tr>" .
7574               "<td>tree</td>" .
7575               "<td class=\"sha1\">" .
7576               $cgi->a({-href => href(action=>"tree", hash=>$co{'tree'}, hash_base=>$hash),
7577                        class => "list"}, $co{'tree'}) .
7578               "</td>" .
7579               "<td class=\"link\">" .
7580               $cgi->a({-href => href(action=>"tree", hash=>$co{'tree'}, hash_base=>$hash)},
7581                       "tree");
7582         my $snapshot_links = format_snapshot_links($hash);
7583         if (defined $snapshot_links) {
7584                 print " | " . $snapshot_links;
7585         }
7586         print "</td>" .
7587               "</tr>\n";
7588
7589         foreach my $par (@$parents) {
7590                 print "<tr>" .
7591                       "<td>parent</td>" .
7592                       "<td class=\"sha1\">" .
7593                       $cgi->a({-href => href(action=>"commit", hash=>$par),
7594                                class => "list"}, $par) .
7595                       "</td>" .
7596                       "<td class=\"link\">" .
7597                       $cgi->a({-href => href(action=>"commit", hash=>$par)}, "commit") .
7598                       " | " .
7599                       $cgi->a({-href => href(action=>"commitdiff", hash=>$hash, hash_parent=>$par)}, "diff") .
7600                       "</td>" .
7601                       "</tr>\n";
7602         }
7603         print "</table>".
7604               "</div>\n";
7605
7606         print "<div class=\"page_body\">\n";
7607         git_print_log($co{'comment'});
7608         print "</div>\n";
7609
7610         git_difftree_body(\@difftree, $hash, @$parents);
7611
7612         git_footer_html();
7613 }
7614
7615 sub git_object {
7616         # object is defined by:
7617         # - hash or hash_base alone
7618         # - hash_base and file_name
7619         my $type;
7620
7621         # - hash or hash_base alone
7622         if ($hash || ($hash_base && !defined $file_name)) {
7623                 my $object_id = $hash || $hash_base;
7624
7625                 open my $fd, "-|", quote_command(
7626                         git_cmd(), 'cat-file', '-t', $object_id) . ' 2> /dev/null'
7627                         or die_error(404, "Object does not exist");
7628                 $type = <$fd>;
7629                 chomp $type;
7630                 close $fd
7631                         or die_error(404, "Object does not exist");
7632
7633         # - hash_base and file_name
7634         } elsif ($hash_base && defined $file_name) {
7635                 $file_name =~ s,/+$,,;
7636
7637                 system(git_cmd(), "cat-file", '-e', $hash_base) == 0
7638                         or die_error(404, "Base object does not exist");
7639
7640                 # here errors should not happen
7641                 open my $fd, "-|", git_cmd(), "ls-tree", $hash_base, "--", $file_name
7642                         or die_error(500, "Open git-ls-tree failed");
7643                 my $line = <$fd>;
7644                 close $fd;
7645
7646                 #'100644 blob 0fa3f3a66fb6a137f6ec2c19351ed4d807070ffa  panic.c'
7647                 unless ($line && $line =~ m/^([0-9]+) (.+) ([0-9a-fA-F]{40})\t/) {
7648                         die_error(404, "File or directory for given base does not exist");
7649                 }
7650                 $type = $2;
7651                 $hash = $3;
7652         } else {
7653                 die_error(400, "Not enough information to find object");
7654         }
7655
7656         print $cgi->redirect(-uri => href(action=>$type, -full=>1,
7657                                           hash=>$hash, hash_base=>$hash_base,
7658                                           file_name=>$file_name),
7659                              -status => '302 Found');
7660 }
7661
7662 sub git_blobdiff {
7663         my $format = shift || 'html';
7664         my $diff_style = $input_params{'diff_style'} || 'inline';
7665
7666         my $fd;
7667         my @difftree;
7668         my %diffinfo;
7669         my $expires;
7670
7671         # preparing $fd and %diffinfo for git_patchset_body
7672         # new style URI
7673         if (defined $hash_base && defined $hash_parent_base) {
7674                 if (defined $file_name) {
7675                         # read raw output
7676                         open $fd, "-|", git_cmd(), "diff-tree", '-r', @diff_opts,
7677                                 $hash_parent_base, $hash_base,
7678                                 "--", (defined $file_parent ? $file_parent : ()), $file_name
7679                                 or die_error(500, "Open git-diff-tree failed");
7680                         @difftree = map { chomp; $_ } <$fd>;
7681                         close $fd
7682                                 or die_error(404, "Reading git-diff-tree failed");
7683                         @difftree
7684                                 or die_error(404, "Blob diff not found");
7685
7686                 } elsif (defined $hash &&
7687                          $hash =~ /[0-9a-fA-F]{40}/) {
7688                         # try to find filename from $hash
7689
7690                         # read filtered raw output
7691                         open $fd, "-|", git_cmd(), "diff-tree", '-r', @diff_opts,
7692                                 $hash_parent_base, $hash_base, "--"
7693                                 or die_error(500, "Open git-diff-tree failed");
7694                         @difftree =
7695                                 # ':100644 100644 03b21826... 3b93d5e7... M     ls-files.c'
7696                                 # $hash == to_id
7697                                 grep { /^:[0-7]{6} [0-7]{6} [0-9a-fA-F]{40} $hash/ }
7698                                 map { chomp; $_ } <$fd>;
7699                         close $fd
7700                                 or die_error(404, "Reading git-diff-tree failed");
7701                         @difftree
7702                                 or die_error(404, "Blob diff not found");
7703
7704                 } else {
7705                         die_error(400, "Missing one of the blob diff parameters");
7706                 }
7707
7708                 if (@difftree > 1) {
7709                         die_error(400, "Ambiguous blob diff specification");
7710                 }
7711
7712                 %diffinfo = parse_difftree_raw_line($difftree[0]);
7713                 $file_parent ||= $diffinfo{'from_file'} || $file_name;
7714                 $file_name   ||= $diffinfo{'to_file'};
7715
7716                 $hash_parent ||= $diffinfo{'from_id'};
7717                 $hash        ||= $diffinfo{'to_id'};
7718
7719                 # non-textual hash id's can be cached
7720                 if ($hash_base =~ m/^[0-9a-fA-F]{40}$/ &&
7721                     $hash_parent_base =~ m/^[0-9a-fA-F]{40}$/) {
7722                         $expires = '+1d';
7723                 }
7724
7725                 # open patch output
7726                 open $fd, "-|", git_cmd(), "diff-tree", '-r', @diff_opts,
7727                         '-p', ($format eq 'html' ? "--full-index" : ()),
7728                         $hash_parent_base, $hash_base,
7729                         "--", (defined $file_parent ? $file_parent : ()), $file_name
7730                         or die_error(500, "Open git-diff-tree failed");
7731         }
7732
7733         # old/legacy style URI -- not generated anymore since 1.4.3.
7734         if (!%diffinfo) {
7735                 die_error('404 Not Found', "Missing one of the blob diff parameters")
7736         }
7737
7738         # header
7739         if ($format eq 'html') {
7740                 my $formats_nav =
7741                         $cgi->a({-href => href(action=>"blobdiff_plain", -replay=>1)},
7742                                 "raw");
7743                 $formats_nav .= diff_style_nav($diff_style);
7744                 git_header_html(undef, $expires);
7745                 if (defined $hash_base && (my %co = parse_commit($hash_base))) {
7746                         git_print_page_nav('','', $hash_base,$co{'tree'},$hash_base, $formats_nav);
7747                         git_print_header_div('commit', esc_html($co{'title'}), $hash_base);
7748                 } else {
7749                         print "<div class=\"page_nav\"><br/>$formats_nav<br/></div>\n";
7750                         print "<div class=\"title\">".esc_html("$hash vs $hash_parent")."</div>\n";
7751                 }
7752                 if (defined $file_name) {
7753                         git_print_page_path($file_name, "blob", $hash_base);
7754                 } else {
7755                         print "<div class=\"page_path\"></div>\n";
7756                 }
7757
7758         } elsif ($format eq 'plain') {
7759                 print $cgi->header(
7760                         -type => 'text/plain',
7761                         -charset => 'utf-8',
7762                         -expires => $expires,
7763                         -content_disposition => 'inline; filename="' . "$file_name" . '.patch"');
7764
7765                 print "X-Git-Url: " . $cgi->self_url() . "\n\n";
7766
7767         } else {
7768                 die_error(400, "Unknown blobdiff format");
7769         }
7770
7771         # patch
7772         if ($format eq 'html') {
7773                 print "<div class=\"page_body\">\n";
7774
7775                 git_patchset_body($fd, $diff_style,
7776                                   [ \%diffinfo ], $hash_base, $hash_parent_base);
7777                 close $fd;
7778
7779                 print "</div>\n"; # class="page_body"
7780                 git_footer_html();
7781
7782         } else {
7783                 while (my $line = <$fd>) {
7784                         $line =~ s!a/($hash|$hash_parent)!'a/'.esc_path($diffinfo{'from_file'})!eg;
7785                         $line =~ s!b/($hash|$hash_parent)!'b/'.esc_path($diffinfo{'to_file'})!eg;
7786
7787                         print $line;
7788
7789                         last if $line =~ m!^\+\+\+!;
7790                 }
7791                 local $/ = undef;
7792                 print <$fd>;
7793                 close $fd;
7794         }
7795 }
7796
7797 sub git_blobdiff_plain {
7798         git_blobdiff('plain');
7799 }
7800
7801 # assumes that it is added as later part of already existing navigation,
7802 # so it returns "| foo | bar" rather than just "foo | bar"
7803 sub diff_style_nav {
7804         my ($diff_style, $is_combined) = @_;
7805         $diff_style ||= 'inline';
7806
7807         return "" if ($is_combined);
7808
7809         my @styles = (inline => 'inline', 'sidebyside' => 'side by side');
7810         my %styles = @styles;
7811         @styles =
7812                 @styles[ map { $_ * 2 } 0..$#styles/2 ];
7813
7814         return join '',
7815                 map { " | ".$_ }
7816                 map {
7817                         $_ eq $diff_style ? $styles{$_} :
7818                         $cgi->a({-href => href(-replay=>1, diff_style => $_)}, $styles{$_})
7819                 } @styles;
7820 }
7821
7822 sub git_commitdiff {
7823         my %params = @_;
7824         my $format = $params{-format} || 'html';
7825         my $diff_style = $input_params{'diff_style'} || 'inline';
7826
7827         my ($patch_max) = gitweb_get_feature('patches');
7828         if ($format eq 'patch') {
7829                 die_error(403, "Patch view not allowed") unless $patch_max;
7830         }
7831
7832         $hash ||= $hash_base || "HEAD";
7833         my %co = parse_commit($hash)
7834             or die_error(404, "Unknown commit object");
7835
7836         # choose format for commitdiff for merge
7837         if (! defined $hash_parent && @{$co{'parents'}} > 1) {
7838                 $hash_parent = '--cc';
7839         }
7840         # we need to prepare $formats_nav before almost any parameter munging
7841         my $formats_nav;
7842         if ($format eq 'html') {
7843                 $formats_nav =
7844                         $cgi->a({-href => href(action=>"commitdiff_plain", -replay=>1)},
7845                                 "raw");
7846                 if ($patch_max && @{$co{'parents'}} <= 1) {
7847                         $formats_nav .= " | " .
7848                                 $cgi->a({-href => href(action=>"patch", -replay=>1)},
7849                                         "patch");
7850                 }
7851                 $formats_nav .= diff_style_nav($diff_style, @{$co{'parents'}} > 1);
7852
7853                 if (defined $hash_parent &&
7854                     $hash_parent ne '-c' && $hash_parent ne '--cc') {
7855                         # commitdiff with two commits given
7856                         my $hash_parent_short = $hash_parent;
7857                         if ($hash_parent =~ m/^[0-9a-fA-F]{40}$/) {
7858                                 $hash_parent_short = substr($hash_parent, 0, 7);
7859                         }
7860                         $formats_nav .=
7861                                 ' (from';
7862                         for (my $i = 0; $i < @{$co{'parents'}}; $i++) {
7863                                 if ($co{'parents'}[$i] eq $hash_parent) {
7864                                         $formats_nav .= ' parent ' . ($i+1);
7865                                         last;
7866                                 }
7867                         }
7868                         $formats_nav .= ': ' .
7869                                 $cgi->a({-href => href(-replay=>1,
7870                                                        hash=>$hash_parent, hash_base=>undef)},
7871                                         esc_html($hash_parent_short)) .
7872                                 ')';
7873                 } elsif (!$co{'parent'}) {
7874                         # --root commitdiff
7875                         $formats_nav .= ' (initial)';
7876                 } elsif (scalar @{$co{'parents'}} == 1) {
7877                         # single parent commit
7878                         $formats_nav .=
7879                                 ' (parent: ' .
7880                                 $cgi->a({-href => href(-replay=>1,
7881                                                        hash=>$co{'parent'}, hash_base=>undef)},
7882                                         esc_html(substr($co{'parent'}, 0, 7))) .
7883                                 ')';
7884                 } else {
7885                         # merge commit
7886                         if ($hash_parent eq '--cc') {
7887                                 $formats_nav .= ' | ' .
7888                                         $cgi->a({-href => href(-replay=>1,
7889                                                                hash=>$hash, hash_parent=>'-c')},
7890                                                 'combined');
7891                         } else { # $hash_parent eq '-c'
7892                                 $formats_nav .= ' | ' .
7893                                         $cgi->a({-href => href(-replay=>1,
7894                                                                hash=>$hash, hash_parent=>'--cc')},
7895                                                 'compact');
7896                         }
7897                         $formats_nav .=
7898                                 ' (merge: ' .
7899                                 join(' ', map {
7900                                         $cgi->a({-href => href(-replay=>1,
7901                                                                hash=>$_, hash_base=>undef)},
7902                                                 esc_html(substr($_, 0, 7)));
7903                                 } @{$co{'parents'}} ) .
7904                                 ')';
7905                 }
7906         }
7907
7908         my $hash_parent_param = $hash_parent;
7909         if (!defined $hash_parent_param) {
7910                 # --cc for multiple parents, --root for parentless
7911                 $hash_parent_param =
7912                         @{$co{'parents'}} > 1 ? '--cc' : $co{'parent'} || '--root';
7913         }
7914
7915         # read commitdiff
7916         my $fd;
7917         my @difftree;
7918         if ($format eq 'html') {
7919                 open $fd, "-|", git_cmd(), "diff-tree", '-r', @diff_opts,
7920                         "--no-commit-id", "--patch-with-raw", "--full-index",
7921                         $hash_parent_param, $hash, "--"
7922                         or die_error(500, "Open git-diff-tree failed");
7923
7924                 while (my $line = <$fd>) {
7925                         chomp $line;
7926                         # empty line ends raw part of diff-tree output
7927                         last unless $line;
7928                         push @difftree, scalar parse_difftree_raw_line($line);
7929                 }
7930
7931         } elsif ($format eq 'plain') {
7932                 open $fd, "-|", git_cmd(), "diff-tree", '-r', @diff_opts,
7933                         '-p', $hash_parent_param, $hash, "--"
7934                         or die_error(500, "Open git-diff-tree failed");
7935         } elsif ($format eq 'patch') {
7936                 # For commit ranges, we limit the output to the number of
7937                 # patches specified in the 'patches' feature.
7938                 # For single commits, we limit the output to a single patch,
7939                 # diverging from the git-format-patch default.
7940                 my @commit_spec = ();
7941                 if ($hash_parent) {
7942                         if ($patch_max > 0) {
7943                                 push @commit_spec, "-$patch_max";
7944                         }
7945                         push @commit_spec, '-n', "$hash_parent..$hash";
7946                 } else {
7947                         if ($params{-single}) {
7948                                 push @commit_spec, '-1';
7949                         } else {
7950                                 if ($patch_max > 0) {
7951                                         push @commit_spec, "-$patch_max";
7952                                 }
7953                                 push @commit_spec, "-n";
7954                         }
7955                         push @commit_spec, '--root', $hash;
7956                 }
7957                 open $fd, "-|", git_cmd(), "format-patch", @diff_opts,
7958                         '--encoding=utf8', '--stdout', @commit_spec
7959                         or die_error(500, "Open git-format-patch failed");
7960         } else {
7961                 die_error(400, "Unknown commitdiff format");
7962         }
7963
7964         # non-textual hash id's can be cached
7965         my $expires;
7966         if ($hash =~ m/^[0-9a-fA-F]{40}$/) {
7967                 $expires = "+1d";
7968         }
7969
7970         # write commit message
7971         if ($format eq 'html') {
7972                 my $refs = git_get_references();
7973                 my $ref = format_ref_marker($refs, $co{'id'});
7974
7975                 git_header_html(undef, $expires);
7976                 git_print_page_nav('commitdiff','', $hash,$co{'tree'},$hash, $formats_nav);
7977                 git_print_header_div('commit', esc_html($co{'title'}) . $ref, $hash);
7978                 print "<div class=\"title_text\">\n" .
7979                       "<table class=\"object_header\">\n";
7980                 git_print_authorship_rows(\%co);
7981                 print "</table>".
7982                       "</div>\n";
7983                 print "<div class=\"page_body\">\n";
7984                 if (@{$co{'comment'}} > 1) {
7985                         print "<div class=\"log\">\n";
7986                         git_print_log($co{'comment'}, -final_empty_line=> 1, -remove_title => 1);
7987                         print "</div>\n"; # class="log"
7988                 }
7989
7990         } elsif ($format eq 'plain') {
7991                 my $refs = git_get_references("tags");
7992                 my $tagname = git_get_rev_name_tags($hash);
7993                 my $filename = basename($project) . "-$hash.patch";
7994
7995                 print $cgi->header(
7996                         -type => 'text/plain',
7997                         -charset => 'utf-8',
7998                         -expires => $expires,
7999                         -content_disposition => 'inline; filename="' . "$filename" . '"');
8000                 my %ad = parse_date($co{'author_epoch'}, $co{'author_tz'});
8001                 print "From: " . to_utf8($co{'author'}) . "\n";
8002                 print "Date: $ad{'rfc2822'} ($ad{'tz_local'})\n";
8003                 print "Subject: " . to_utf8($co{'title'}) . "\n";
8004
8005                 print "X-Git-Tag: $tagname\n" if $tagname;
8006                 print "X-Git-Url: " . $cgi->self_url() . "\n\n";
8007
8008                 foreach my $line (@{$co{'comment'}}) {
8009                         print to_utf8($line) . "\n";
8010                 }
8011                 print "---\n\n";
8012         } elsif ($format eq 'patch') {
8013                 my $filename = basename($project) . "-$hash.patch";
8014
8015                 print $cgi->header(
8016                         -type => 'text/plain',
8017                         -charset => 'utf-8',
8018                         -expires => $expires,
8019                         -content_disposition => 'inline; filename="' . "$filename" . '"');
8020         }
8021
8022         # write patch
8023         if ($format eq 'html') {
8024                 my $use_parents = !defined $hash_parent ||
8025                         $hash_parent eq '-c' || $hash_parent eq '--cc';
8026                 git_difftree_body(\@difftree, $hash,
8027                                   $use_parents ? @{$co{'parents'}} : $hash_parent);
8028                 print "<br/>\n";
8029
8030                 git_patchset_body($fd, $diff_style,
8031                                   \@difftree, $hash,
8032                                   $use_parents ? @{$co{'parents'}} : $hash_parent);
8033                 close $fd;
8034                 print "</div>\n"; # class="page_body"
8035                 git_footer_html();
8036
8037         } elsif ($format eq 'plain') {
8038                 local $/ = undef;
8039                 print <$fd>;
8040                 close $fd
8041                         or print "Reading git-diff-tree failed\n";
8042         } elsif ($format eq 'patch') {
8043                 local $/ = undef;
8044                 print <$fd>;
8045                 close $fd
8046                         or print "Reading git-format-patch failed\n";
8047         }
8048 }
8049
8050 sub git_commitdiff_plain {
8051         git_commitdiff(-format => 'plain');
8052 }
8053
8054 # format-patch-style patches
8055 sub git_patch {
8056         git_commitdiff(-format => 'patch', -single => 1);
8057 }
8058
8059 sub git_patches {
8060         git_commitdiff(-format => 'patch');
8061 }
8062
8063 sub git_history {
8064         git_log_generic('history', \&git_history_body,
8065                         $hash_base, $hash_parent_base,
8066                         $file_name, $hash);
8067 }
8068
8069 sub git_search {
8070         $searchtype ||= 'commit';
8071
8072         # check if appropriate features are enabled
8073         gitweb_check_feature('search')
8074                 or die_error(403, "Search is disabled");
8075         if ($searchtype eq 'pickaxe') {
8076                 # pickaxe may take all resources of your box and run for several minutes
8077                 # with every query - so decide by yourself how public you make this feature
8078                 gitweb_check_feature('pickaxe')
8079                         or die_error(403, "Pickaxe search is disabled");
8080         }
8081         if ($searchtype eq 'grep') {
8082                 # grep search might be potentially CPU-intensive, too
8083                 gitweb_check_feature('grep')
8084                         or die_error(403, "Grep search is disabled");
8085         }
8086
8087         if (!defined $searchtext) {
8088                 die_error(400, "Text field is empty");
8089         }
8090         if (!defined $hash) {
8091                 $hash = git_get_head_hash($project);
8092         }
8093         my %co = parse_commit($hash);
8094         if (!%co) {
8095                 die_error(404, "Unknown commit object");
8096         }
8097         if (!defined $page) {
8098                 $page = 0;
8099         }
8100
8101         if ($searchtype eq 'commit' ||
8102             $searchtype eq 'author' ||
8103             $searchtype eq 'committer') {
8104                 git_search_message(%co);
8105         } elsif ($searchtype eq 'pickaxe') {
8106                 git_search_changes(%co);
8107         } elsif ($searchtype eq 'grep') {
8108                 git_search_files(%co);
8109         } else {
8110                 die_error(400, "Unknown search type");
8111         }
8112 }
8113
8114 sub git_search_help {
8115         git_header_html();
8116         git_print_page_nav('','', $hash,$hash,$hash);
8117         print <<EOT;
8118 <p><strong>Pattern</strong> is by default a normal string that is matched precisely (but without
8119 regard to case, except in the case of pickaxe). However, when you check the <em>re</em> checkbox,
8120 the pattern entered is recognized as the POSIX extended
8121 <a href="http://en.wikipedia.org/wiki/Regular_expression">regular expression</a> (also case
8122 insensitive).</p>
8123 <dl>
8124 <dt><b>commit</b></dt>
8125 <dd>The commit messages and authorship information will be scanned for the given pattern.</dd>
8126 EOT
8127         my $have_grep = gitweb_check_feature('grep');
8128         if ($have_grep) {
8129                 print <<EOT;
8130 <dt><b>grep</b></dt>
8131 <dd>All files in the currently selected tree (HEAD unless you are explicitly browsing
8132     a different one) are searched for the given pattern. On large trees, this search can take
8133 a while and put some strain on the server, so please use it with some consideration. Note that
8134 due to git-grep peculiarity, currently if regexp mode is turned off, the matches are
8135 case-sensitive.</dd>
8136 EOT
8137         }
8138         print <<EOT;
8139 <dt><b>author</b></dt>
8140 <dd>Name and e-mail of the change author and date of birth of the patch will be scanned for the given pattern.</dd>
8141 <dt><b>committer</b></dt>
8142 <dd>Name and e-mail of the committer and date of commit will be scanned for the given pattern.</dd>
8143 EOT
8144         my $have_pickaxe = gitweb_check_feature('pickaxe');
8145         if ($have_pickaxe) {
8146                 print <<EOT;
8147 <dt><b>pickaxe</b></dt>
8148 <dd>All commits that caused the string to appear or disappear from any file (changes that
8149 added, removed or "modified" the string) will be listed. This search can take a while and
8150 takes a lot of strain on the server, so please use it wisely. Note that since you may be
8151 interested even in changes just changing the case as well, this search is case sensitive.</dd>
8152 EOT
8153         }
8154         print "</dl>\n";
8155         git_footer_html();
8156 }
8157
8158 sub git_shortlog {
8159         git_log_generic('shortlog', \&git_shortlog_body,
8160                         $hash, $hash_parent);
8161 }
8162
8163 ## ......................................................................
8164 ## feeds (RSS, Atom; OPML)
8165
8166 sub git_feed {
8167         my $format = shift || 'atom';
8168         my $have_blame = gitweb_check_feature('blame');
8169
8170         # Atom: http://www.atomenabled.org/developers/syndication/
8171         # RSS:  http://www.notestips.com/80256B3A007F2692/1/NAMO5P9UPQ
8172         if ($format ne 'rss' && $format ne 'atom') {
8173                 die_error(400, "Unknown web feed format");
8174         }
8175
8176         # log/feed of current (HEAD) branch, log of given branch, history of file/directory
8177         my $head = $hash || 'HEAD';
8178         my @commitlist = parse_commits($head, 150, 0, $file_name);
8179
8180         my %latest_commit;
8181         my %latest_date;
8182         my $content_type = "application/$format+xml";
8183         if (defined $cgi->http('HTTP_ACCEPT') &&
8184                  $cgi->Accept('text/xml') > $cgi->Accept($content_type)) {
8185                 # browser (feed reader) prefers text/xml
8186                 $content_type = 'text/xml';
8187         }
8188         if (defined($commitlist[0])) {
8189                 %latest_commit = %{$commitlist[0]};
8190                 my $latest_epoch = $latest_commit{'committer_epoch'};
8191                 exit_if_unmodified_since($latest_epoch);
8192                 %latest_date = parse_date($latest_epoch, $latest_commit{'committer_tz'});
8193         }
8194         print $cgi->header(
8195                 -type => $content_type,
8196                 -charset => 'utf-8',
8197                 %latest_date ? (-last_modified => $latest_date{'rfc2822'}) : (),
8198                 -status => '200 OK');
8199
8200         # Optimization: skip generating the body if client asks only
8201         # for Last-Modified date.
8202         return if ($cgi->request_method() eq 'HEAD');
8203
8204         # header variables
8205         my $title = "$site_name - $project/$action";
8206         my $feed_type = 'log';
8207         if (defined $hash) {
8208                 $title .= " - '$hash'";
8209                 $feed_type = 'branch log';
8210                 if (defined $file_name) {
8211                         $title .= " :: $file_name";
8212                         $feed_type = 'history';
8213                 }
8214         } elsif (defined $file_name) {
8215                 $title .= " - $file_name";
8216                 $feed_type = 'history';
8217         }
8218         $title .= " $feed_type";
8219         $title = esc_html($title);
8220         my $descr = git_get_project_description($project);
8221         if (defined $descr) {
8222                 $descr = esc_html($descr);
8223         } else {
8224                 $descr = "$project " .
8225                          ($format eq 'rss' ? 'RSS' : 'Atom') .
8226                          " feed";
8227         }
8228         my $owner = git_get_project_owner($project);
8229         $owner = esc_html($owner);
8230
8231         #header
8232         my $alt_url;
8233         if (defined $file_name) {
8234                 $alt_url = href(-full=>1, action=>"history", hash=>$hash, file_name=>$file_name);
8235         } elsif (defined $hash) {
8236                 $alt_url = href(-full=>1, action=>"log", hash=>$hash);
8237         } else {
8238                 $alt_url = href(-full=>1, action=>"summary");
8239         }
8240         print qq!<?xml version="1.0" encoding="utf-8"?>\n!;
8241         if ($format eq 'rss') {
8242                 print <<XML;
8243 <rss version="2.0" xmlns:content="http://purl.org/rss/1.0/modules/content/">
8244 <channel>
8245 XML
8246                 print "<title>$title</title>\n" .
8247                       "<link>$alt_url</link>\n" .
8248                       "<description>$descr</description>\n" .
8249                       "<language>en</language>\n" .
8250                       # project owner is responsible for 'editorial' content
8251                       "<managingEditor>$owner</managingEditor>\n";
8252                 if (defined $logo || defined $favicon) {
8253                         # prefer the logo to the favicon, since RSS
8254                         # doesn't allow both
8255                         my $img = esc_url($logo || $favicon);
8256                         print "<image>\n" .
8257                               "<url>$img</url>\n" .
8258                               "<title>$title</title>\n" .
8259                               "<link>$alt_url</link>\n" .
8260                               "</image>\n";
8261                 }
8262                 if (%latest_date) {
8263                         print "<pubDate>$latest_date{'rfc2822'}</pubDate>\n";
8264                         print "<lastBuildDate>$latest_date{'rfc2822'}</lastBuildDate>\n";
8265                 }
8266                 print "<generator>gitweb v.$version/$git_version</generator>\n";
8267         } elsif ($format eq 'atom') {
8268                 print <<XML;
8269 <feed xmlns="http://www.w3.org/2005/Atom">
8270 XML
8271                 print "<title>$title</title>\n" .
8272                       "<subtitle>$descr</subtitle>\n" .
8273                       '<link rel="alternate" type="text/html" href="' .
8274                       $alt_url . '" />' . "\n" .
8275                       '<link rel="self" type="' . $content_type . '" href="' .
8276                       $cgi->self_url() . '" />' . "\n" .
8277                       "<id>" . href(-full=>1) . "</id>\n" .
8278                       # use project owner for feed author
8279                       "<author><name>$owner</name></author>\n";
8280                 if (defined $favicon) {
8281                         print "<icon>" . esc_url($favicon) . "</icon>\n";
8282                 }
8283                 if (defined $logo) {
8284                         # not twice as wide as tall: 72 x 27 pixels
8285                         print "<logo>" . esc_url($logo) . "</logo>\n";
8286                 }
8287                 if (! %latest_date) {
8288                         # dummy date to keep the feed valid until commits trickle in:
8289                         print "<updated>1970-01-01T00:00:00Z</updated>\n";
8290                 } else {
8291                         print "<updated>$latest_date{'iso-8601'}</updated>\n";
8292                 }
8293                 print "<generator version='$version/$git_version'>gitweb</generator>\n";
8294         }
8295
8296         # contents
8297         for (my $i = 0; $i <= $#commitlist; $i++) {
8298                 my %co = %{$commitlist[$i]};
8299                 my $commit = $co{'id'};
8300                 # we read 150, we always show 30 and the ones more recent than 48 hours
8301                 if (($i >= 20) && ((time - $co{'author_epoch'}) > 48*60*60)) {
8302                         last;
8303                 }
8304                 my %cd = parse_date($co{'author_epoch'}, $co{'author_tz'});
8305
8306                 # get list of changed files
8307                 open my $fd, "-|", git_cmd(), "diff-tree", '-r', @diff_opts,
8308                         $co{'parent'} || "--root",
8309                         $co{'id'}, "--", (defined $file_name ? $file_name : ())
8310                         or next;
8311                 my @difftree = map { chomp; $_ } <$fd>;
8312                 close $fd
8313                         or next;
8314
8315                 # print element (entry, item)
8316                 my $co_url = href(-full=>1, action=>"commitdiff", hash=>$commit);
8317                 if ($format eq 'rss') {
8318                         print "<item>\n" .
8319                               "<title>" . esc_html($co{'title'}) . "</title>\n" .
8320                               "<author>" . esc_html($co{'author'}) . "</author>\n" .
8321                               "<pubDate>$cd{'rfc2822'}</pubDate>\n" .
8322                               "<guid isPermaLink=\"true\">$co_url</guid>\n" .
8323                               "<link>$co_url</link>\n" .
8324                               "<description>" . esc_html($co{'title'}) . "</description>\n" .
8325                               "<content:encoded>" .
8326                               "<![CDATA[\n";
8327                 } elsif ($format eq 'atom') {
8328                         print "<entry>\n" .
8329                               "<title type=\"html\">" . esc_html($co{'title'}) . "</title>\n" .
8330                               "<updated>$cd{'iso-8601'}</updated>\n" .
8331                               "<author>\n" .
8332                               "  <name>" . esc_html($co{'author_name'}) . "</name>\n";
8333                         if ($co{'author_email'}) {
8334                                 print "  <email>" . esc_html($co{'author_email'}) . "</email>\n";
8335                         }
8336                         print "</author>\n" .
8337                               # use committer for contributor
8338                               "<contributor>\n" .
8339                               "  <name>" . esc_html($co{'committer_name'}) . "</name>\n";
8340                         if ($co{'committer_email'}) {
8341                                 print "  <email>" . esc_html($co{'committer_email'}) . "</email>\n";
8342                         }
8343                         print "</contributor>\n" .
8344                               "<published>$cd{'iso-8601'}</published>\n" .
8345                               "<link rel=\"alternate\" type=\"text/html\" href=\"$co_url\" />\n" .
8346                               "<id>$co_url</id>\n" .
8347                               "<content type=\"xhtml\" xml:base=\"" . esc_url($my_url) . "\">\n" .
8348                               "<div xmlns=\"http://www.w3.org/1999/xhtml\">\n";
8349                 }
8350                 my $comment = $co{'comment'};
8351                 print "<pre>\n";
8352                 foreach my $line (@$comment) {
8353                         $line = esc_html($line);
8354                         print "$line\n";
8355                 }
8356                 print "</pre><ul>\n";
8357                 foreach my $difftree_line (@difftree) {
8358                         my %difftree = parse_difftree_raw_line($difftree_line);
8359                         next if !$difftree{'from_id'};
8360
8361                         my $file = $difftree{'file'} || $difftree{'to_file'};
8362
8363                         print "<li>" .
8364                               "[" .
8365                               $cgi->a({-href => href(-full=>1, action=>"blobdiff",
8366                                                      hash=>$difftree{'to_id'}, hash_parent=>$difftree{'from_id'},
8367                                                      hash_base=>$co{'id'}, hash_parent_base=>$co{'parent'},
8368                                                      file_name=>$file, file_parent=>$difftree{'from_file'}),
8369                                       -title => "diff"}, 'D');
8370                         if ($have_blame) {
8371                                 print $cgi->a({-href => href(-full=>1, action=>"blame",
8372                                                              file_name=>$file, hash_base=>$commit),
8373                                               -title => "blame"}, 'B');
8374                         }
8375                         # if this is not a feed of a file history
8376                         if (!defined $file_name || $file_name ne $file) {
8377                                 print $cgi->a({-href => href(-full=>1, action=>"history",
8378                                                              file_name=>$file, hash=>$commit),
8379                                               -title => "history"}, 'H');
8380                         }
8381                         $file = esc_path($file);
8382                         print "] ".
8383                               "$file</li>\n";
8384                 }
8385                 if ($format eq 'rss') {
8386                         print "</ul>]]>\n" .
8387                               "</content:encoded>\n" .
8388                               "</item>\n";
8389                 } elsif ($format eq 'atom') {
8390                         print "</ul>\n</div>\n" .
8391                               "</content>\n" .
8392                               "</entry>\n";
8393                 }
8394         }
8395
8396         # end of feed
8397         if ($format eq 'rss') {
8398                 print "</channel>\n</rss>\n";
8399         } elsif ($format eq 'atom') {
8400                 print "</feed>\n";
8401         }
8402 }
8403
8404 sub git_rss {
8405         git_feed('rss');
8406 }
8407
8408 sub git_atom {
8409         git_feed('atom');
8410 }
8411
8412 sub git_opml {
8413         my @list = git_get_projects_list($project_filter, $strict_export);
8414         if (!@list) {
8415                 die_error(404, "No projects found");
8416         }
8417
8418         print $cgi->header(
8419                 -type => 'text/xml',
8420                 -charset => 'utf-8',
8421                 -content_disposition => 'inline; filename="opml.xml"');
8422
8423         my $title = esc_html($site_name);
8424         my $filter = " within subdirectory ";
8425         if (defined $project_filter) {
8426                 $filter .= esc_html($project_filter);
8427         } else {
8428                 $filter = "";
8429         }
8430         print <<XML;
8431 <?xml version="1.0" encoding="utf-8"?>
8432 <opml version="1.0">
8433 <head>
8434   <title>$title OPML Export$filter</title>
8435 </head>
8436 <body>
8437 <outline text="git RSS feeds">
8438 XML
8439
8440         foreach my $pr (@list) {
8441                 my %proj = %$pr;
8442                 my $head = git_get_head_hash($proj{'path'});
8443                 if (!defined $head) {
8444                         next;
8445                 }
8446                 $git_dir = "$projectroot/$proj{'path'}";
8447                 my %co = parse_commit($head);
8448                 if (!%co) {
8449                         next;
8450                 }
8451
8452                 my $path = esc_html(chop_str($proj{'path'}, 25, 5));
8453                 my $rss  = href('project' => $proj{'path'}, 'action' => 'rss', -full => 1);
8454                 my $html = href('project' => $proj{'path'}, 'action' => 'summary', -full => 1);
8455                 print "<outline type=\"rss\" text=\"$path\" title=\"$path\" xmlUrl=\"$rss\" htmlUrl=\"$html\"/>\n";
8456         }
8457         print <<XML;
8458 </outline>
8459 </body>
8460 </opml>
8461 XML
8462 }