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