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                                 )}, $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", $hash)." | ".
3938                   quote_command($highlight_bin).
3939                   " --replace-tabs=8 --fragment --syntax $syntax |"
3940                 or die_error(500, "Couldn't open file or run syntax highlighter");
3941         return $fd;
3942 }
3943
3944 ## ======================================================================
3945 ## functions printing HTML: header, footer, error page
3946
3947 sub get_page_title {
3948         my $title = to_utf8($site_name);
3949
3950         unless (defined $project) {
3951                 if (defined $project_filter) {
3952                         $title .= " - projects in '" . esc_path($project_filter) . "'";
3953                 }
3954                 return $title;
3955         }
3956         $title .= " - " . to_utf8($project);
3957
3958         return $title unless (defined $action);
3959         $title .= "/$action"; # $action is US-ASCII (7bit ASCII)
3960
3961         return $title unless (defined $file_name);
3962         $title .= " - " . esc_path($file_name);
3963         if ($action eq "tree" && $file_name !~ m|/$|) {
3964                 $title .= "/";
3965         }
3966
3967         return $title;
3968 }
3969
3970 sub get_content_type_html {
3971         # require explicit support from the UA if we are to send the page as
3972         # 'application/xhtml+xml', otherwise send it as plain old 'text/html'.
3973         # we have to do this because MSIE sometimes globs '*/*', pretending to
3974         # support xhtml+xml but choking when it gets what it asked for.
3975         if (defined $cgi->http('HTTP_ACCEPT') &&
3976             $cgi->http('HTTP_ACCEPT') =~ m/(,|;|\s|^)application\/xhtml\+xml(,|;|\s|$)/ &&
3977             $cgi->Accept('application/xhtml+xml') != 0) {
3978                 return 'application/xhtml+xml';
3979         } else {
3980                 return 'text/html';
3981         }
3982 }
3983
3984 sub print_feed_meta {
3985         if (defined $project) {
3986                 my %href_params = get_feed_info();
3987                 if (!exists $href_params{'-title'}) {
3988                         $href_params{'-title'} = 'log';
3989                 }
3990
3991                 foreach my $format (qw(RSS Atom)) {
3992                         my $type = lc($format);
3993                         my %link_attr = (
3994                                 '-rel' => 'alternate',
3995                                 '-title' => esc_attr("$project - $href_params{'-title'} - $format feed"),
3996                                 '-type' => "application/$type+xml"
3997                         );
3998
3999                         $href_params{'extra_options'} = undef;
4000                         $href_params{'action'} = $type;
4001                         $link_attr{'-href'} = href(%href_params);
4002                         print "<link ".
4003                               "rel=\"$link_attr{'-rel'}\" ".
4004                               "title=\"$link_attr{'-title'}\" ".
4005                               "href=\"$link_attr{'-href'}\" ".
4006                               "type=\"$link_attr{'-type'}\" ".
4007                               "/>\n";
4008
4009                         $href_params{'extra_options'} = '--no-merges';
4010                         $link_attr{'-href'} = href(%href_params);
4011                         $link_attr{'-title'} .= ' (no merges)';
4012                         print "<link ".
4013                               "rel=\"$link_attr{'-rel'}\" ".
4014                               "title=\"$link_attr{'-title'}\" ".
4015                               "href=\"$link_attr{'-href'}\" ".
4016                               "type=\"$link_attr{'-type'}\" ".
4017                               "/>\n";
4018                 }
4019
4020         } else {
4021                 printf('<link rel="alternate" title="%s projects list" '.
4022                        'href="%s" type="text/plain; charset=utf-8" />'."\n",
4023                        esc_attr($site_name), href(project=>undef, action=>"project_index"));
4024                 printf('<link rel="alternate" title="%s projects feeds" '.
4025                        'href="%s" type="text/x-opml" />'."\n",
4026                        esc_attr($site_name), href(project=>undef, action=>"opml"));
4027         }
4028 }
4029
4030 sub print_header_links {
4031         my $status = shift;
4032
4033         # print out each stylesheet that exist, providing backwards capability
4034         # for those people who defined $stylesheet in a config file
4035         if (defined $stylesheet) {
4036                 print '<link rel="stylesheet" type="text/css" href="'.esc_url($stylesheet).'"/>'."\n";
4037         } else {
4038                 foreach my $stylesheet (@stylesheets) {
4039                         next unless $stylesheet;
4040                         print '<link rel="stylesheet" type="text/css" href="'.esc_url($stylesheet).'"/>'."\n";
4041                 }
4042         }
4043         print_feed_meta()
4044                 if ($status eq '200 OK');
4045         if (defined $favicon) {
4046                 print qq(<link rel="shortcut icon" href=").esc_url($favicon).qq(" type="image/png" />\n);
4047         }
4048 }
4049
4050 sub print_nav_breadcrumbs_path {
4051         my $dirprefix = undef;
4052         while (my $part = shift) {
4053                 $dirprefix .= "/" if defined $dirprefix;
4054                 $dirprefix .= $part;
4055                 print $cgi->a({-href => href(project => undef,
4056                                              project_filter => $dirprefix,
4057                                              action => "project_list")},
4058                               esc_html($part)) . " / ";
4059         }
4060 }
4061
4062 sub print_nav_breadcrumbs {
4063         my %opts = @_;
4064
4065         for my $crumb (@extra_breadcrumbs, [ $home_link_str => $home_link ]) {
4066                 print $cgi->a({-href => esc_url($crumb->[1])}, $crumb->[0]) . " / ";
4067         }
4068         if (defined $project) {
4069                 my @dirname = split '/', $project;
4070                 my $projectbasename = pop @dirname;
4071                 print_nav_breadcrumbs_path(@dirname);
4072                 print $cgi->a({-href => href(action=>"summary")}, esc_html($projectbasename));
4073                 if (defined $action) {
4074                         my $action_print = $action ;
4075                         if (defined $opts{-action_extra}) {
4076                                 $action_print = $cgi->a({-href => href(action=>$action)},
4077                                         $action);
4078                         }
4079                         print " / $action_print";
4080                 }
4081                 if (defined $opts{-action_extra}) {
4082                         print " / $opts{-action_extra}";
4083                 }
4084                 print "\n";
4085         } elsif (defined $project_filter) {
4086                 print_nav_breadcrumbs_path(split '/', $project_filter);
4087         }
4088 }
4089
4090 sub print_search_form {
4091         if (!defined $searchtext) {
4092                 $searchtext = "";
4093         }
4094         my $search_hash;
4095         if (defined $hash_base) {
4096                 $search_hash = $hash_base;
4097         } elsif (defined $hash) {
4098                 $search_hash = $hash;
4099         } else {
4100                 $search_hash = "HEAD";
4101         }
4102         my $action = $my_uri;
4103         my $use_pathinfo = gitweb_check_feature('pathinfo');
4104         if ($use_pathinfo) {
4105                 $action .= "/".esc_url($project);
4106         }
4107         print $cgi->start_form(-method => "get", -action => $action) .
4108               "<div class=\"search\">\n" .
4109               (!$use_pathinfo &&
4110               $cgi->input({-name=>"p", -value=>$project, -type=>"hidden"}) . "\n") .
4111               $cgi->input({-name=>"a", -value=>"search", -type=>"hidden"}) . "\n" .
4112               $cgi->input({-name=>"h", -value=>$search_hash, -type=>"hidden"}) . "\n" .
4113               $cgi->popup_menu(-name => 'st', -default => 'commit',
4114                                -values => ['commit', 'grep', 'author', 'committer', 'pickaxe']) .
4115               " " . $cgi->a({-href => href(action=>"search_help"),
4116                              -title => "search help" }, "?") . " search:\n",
4117               $cgi->textfield(-name => "s", -value => $searchtext, -override => 1) . "\n" .
4118               "<span title=\"Extended regular expression\">" .
4119               $cgi->checkbox(-name => 'sr', -value => 1, -label => 're',
4120                              -checked => $search_use_regexp) .
4121               "</span>" .
4122               "</div>" .
4123               $cgi->end_form() . "\n";
4124 }
4125
4126 sub git_header_html {
4127         my $status = shift || "200 OK";
4128         my $expires = shift;
4129         my %opts = @_;
4130
4131         my $title = get_page_title();
4132         my $content_type = get_content_type_html();
4133         print $cgi->header(-type=>$content_type, -charset => 'utf-8',
4134                            -status=> $status, -expires => $expires)
4135                 unless ($opts{'-no_http_header'});
4136         my $mod_perl_version = $ENV{'MOD_PERL'} ? " $ENV{'MOD_PERL'}" : '';
4137         print <<EOF;
4138 <?xml version="1.0" encoding="utf-8"?>
4139 <!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Strict//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-strict.dtd">
4140 <html xmlns="http://www.w3.org/1999/xhtml" xml:lang="en-US" lang="en-US">
4141 <!-- git web interface version $version, (C) 2005-2006, Kay Sievers <kay.sievers\@vrfy.org>, Christian Gierke -->
4142 <!-- git core binaries version $git_version -->
4143 <head>
4144 <meta http-equiv="content-type" content="$content_type; charset=utf-8"/>
4145 <meta name="generator" content="gitweb/$version git/$git_version$mod_perl_version"/>
4146 <meta name="robots" content="index, nofollow"/>
4147 <title>$title</title>
4148 EOF
4149         # the stylesheet, favicon etc urls won't work correctly with path_info
4150         # unless we set the appropriate base URL
4151         if ($ENV{'PATH_INFO'}) {
4152                 print "<base href=\"".esc_url($base_url)."\" />\n";
4153         }
4154         print_header_links($status);
4155
4156         if (defined $site_html_head_string) {
4157                 print to_utf8($site_html_head_string);
4158         }
4159
4160         print "</head>\n" .
4161               "<body>\n";
4162
4163         if (defined $site_header && -f $site_header) {
4164                 insert_file($site_header);
4165         }
4166
4167         print "<div class=\"page_header\">\n";
4168         if (defined $logo) {
4169                 print $cgi->a({-href => esc_url($logo_url),
4170                                -title => $logo_label},
4171                               $cgi->img({-src => esc_url($logo),
4172                                          -width => 72, -height => 27,
4173                                          -alt => "git",
4174                                          -class => "logo"}));
4175         }
4176         print_nav_breadcrumbs(%opts);
4177         print "</div>\n";
4178
4179         my $have_search = gitweb_check_feature('search');
4180         if (defined $project && $have_search) {
4181                 print_search_form();
4182         }
4183 }
4184
4185 sub git_footer_html {
4186         my $feed_class = 'rss_logo';
4187
4188         print "<div class=\"page_footer\">\n";
4189         if (defined $project) {
4190                 my $descr = git_get_project_description($project);
4191                 if (defined $descr) {
4192                         print "<div class=\"page_footer_text\">" . esc_html($descr) . "</div>\n";
4193                 }
4194
4195                 my %href_params = get_feed_info();
4196                 if (!%href_params) {
4197                         $feed_class .= ' generic';
4198                 }
4199                 $href_params{'-title'} ||= 'log';
4200
4201                 foreach my $format (qw(RSS Atom)) {
4202                         $href_params{'action'} = lc($format);
4203                         print $cgi->a({-href => href(%href_params),
4204                                       -title => "$href_params{'-title'} $format feed",
4205                                       -class => $feed_class}, $format)."\n";
4206                 }
4207
4208         } else {
4209                 print $cgi->a({-href => href(project=>undef, action=>"opml",
4210                                              project_filter => $project_filter),
4211                               -class => $feed_class}, "OPML") . " ";
4212                 print $cgi->a({-href => href(project=>undef, action=>"project_index",
4213                                              project_filter => $project_filter),
4214                               -class => $feed_class}, "TXT") . "\n";
4215         }
4216         print "</div>\n"; # class="page_footer"
4217
4218         if (defined $t0 && gitweb_check_feature('timed')) {
4219                 print "<div id=\"generating_info\">\n";
4220                 print 'This page took '.
4221                       '<span id="generating_time" class="time_span">'.
4222                       tv_interval($t0, [ gettimeofday() ]).
4223                       ' seconds </span>'.
4224                       ' and '.
4225                       '<span id="generating_cmd">'.
4226                       $number_of_git_cmds.
4227                       '</span> git commands '.
4228                       " to generate.\n";
4229                 print "</div>\n"; # class="page_footer"
4230         }
4231
4232         if (defined $site_footer && -f $site_footer) {
4233                 insert_file($site_footer);
4234         }
4235
4236         print qq!<script type="text/javascript" src="!.esc_url($javascript).qq!"></script>\n!;
4237         if (defined $action &&
4238             $action eq 'blame_incremental') {
4239                 print qq!<script type="text/javascript">\n!.
4240                       qq!startBlame("!. href(action=>"blame_data", -replay=>1) .qq!",\n!.
4241                       qq!           "!. href() .qq!");\n!.
4242                       qq!</script>\n!;
4243         } else {
4244                 my ($jstimezone, $tz_cookie, $datetime_class) =
4245                         gitweb_get_feature('javascript-timezone');
4246
4247                 print qq!<script type="text/javascript">\n!.
4248                       qq!window.onload = function () {\n!;
4249                 if (gitweb_check_feature('javascript-actions')) {
4250                         print qq!       fixLinks();\n!;
4251                 }
4252                 if ($jstimezone && $tz_cookie && $datetime_class) {
4253                         print qq!       var tz_cookie = { name: '$tz_cookie', expires: 14, path: '/' };\n!. # in days
4254                               qq!       onloadTZSetup('$jstimezone', tz_cookie, '$datetime_class');\n!;
4255                 }
4256                 print qq!};\n!.
4257                       qq!</script>\n!;
4258         }
4259
4260         print "</body>\n" .
4261               "</html>";
4262 }
4263
4264 # die_error(<http_status_code>, <error_message>[, <detailed_html_description>])
4265 # Example: die_error(404, 'Hash not found')
4266 # By convention, use the following status codes (as defined in RFC 2616):
4267 # 400: Invalid or missing CGI parameters, or
4268 #      requested object exists but has wrong type.
4269 # 403: Requested feature (like "pickaxe" or "snapshot") not enabled on
4270 #      this server or project.
4271 # 404: Requested object/revision/project doesn't exist.
4272 # 500: The server isn't configured properly, or
4273 #      an internal error occurred (e.g. failed assertions caused by bugs), or
4274 #      an unknown error occurred (e.g. the git binary died unexpectedly).
4275 # 503: The server is currently unavailable (because it is overloaded,
4276 #      or down for maintenance).  Generally, this is a temporary state.
4277 sub die_error {
4278         my $status = shift || 500;
4279         my $error = esc_html(shift) || "Internal Server Error";
4280         my $extra = shift;
4281         my %opts = @_;
4282
4283         my %http_responses = (
4284                 400 => '400 Bad Request',
4285                 403 => '403 Forbidden',
4286                 404 => '404 Not Found',
4287                 500 => '500 Internal Server Error',
4288                 503 => '503 Service Unavailable',
4289         );
4290         git_header_html($http_responses{$status}, undef, %opts);
4291         print <<EOF;
4292 <div class="page_body">
4293 <br /><br />
4294 $status - $error
4295 <br />
4296 EOF
4297         if (defined $extra) {
4298                 print "<hr />\n" .
4299                       "$extra\n";
4300         }
4301         print "</div>\n";
4302
4303         git_footer_html();
4304         goto DONE_GITWEB
4305                 unless ($opts{'-error_handler'});
4306 }
4307
4308 ## ----------------------------------------------------------------------
4309 ## functions printing or outputting HTML: navigation
4310
4311 sub git_print_page_nav {
4312         my ($current, $suppress, $head, $treehead, $treebase, $extra) = @_;
4313         $extra = '' if !defined $extra; # pager or formats
4314
4315         my @navs = qw(summary shortlog log commit commitdiff tree);
4316         if ($suppress) {
4317                 @navs = grep { $_ ne $suppress } @navs;
4318         }
4319
4320         my %arg = map { $_ => {action=>$_} } @navs;
4321         if (defined $head) {
4322                 for (qw(commit commitdiff)) {
4323                         $arg{$_}{'hash'} = $head;
4324                 }
4325                 if ($current =~ m/^(tree | log | shortlog | commit | commitdiff | search)$/x) {
4326                         for (qw(shortlog log)) {
4327                                 $arg{$_}{'hash'} = $head;
4328                         }
4329                 }
4330         }
4331
4332         $arg{'tree'}{'hash'} = $treehead if defined $treehead;
4333         $arg{'tree'}{'hash_base'} = $treebase if defined $treebase;
4334
4335         my @actions = gitweb_get_feature('actions');
4336         my %repl = (
4337                 '%' => '%',
4338                 'n' => $project,         # project name
4339                 'f' => $git_dir,         # project path within filesystem
4340                 'h' => $treehead || '',  # current hash ('h' parameter)
4341                 'b' => $treebase || '',  # hash base ('hb' parameter)
4342         );
4343         while (@actions) {
4344                 my ($label, $link, $pos) = splice(@actions,0,3);
4345                 # insert
4346                 @navs = map { $_ eq $pos ? ($_, $label) : $_ } @navs;
4347                 # munch munch
4348                 $link =~ s/%([%nfhb])/$repl{$1}/g;
4349                 $arg{$label}{'_href'} = $link;
4350         }
4351
4352         print "<div class=\"page_nav\">\n" .
4353                 (join " | ",
4354                  map { $_ eq $current ?
4355                        $_ : $cgi->a({-href => ($arg{$_}{_href} ? $arg{$_}{_href} : href(%{$arg{$_}}))}, "$_")
4356                  } @navs);
4357         print "<br/>\n$extra<br/>\n" .
4358               "</div>\n";
4359 }
4360
4361 # returns a submenu for the nagivation of the refs views (tags, heads,
4362 # remotes) with the current view disabled and the remotes view only
4363 # available if the feature is enabled
4364 sub format_ref_views {
4365         my ($current) = @_;
4366         my @ref_views = qw{tags heads};
4367         push @ref_views, 'remotes' if gitweb_check_feature('remote_heads');
4368         return join " | ", map {
4369                 $_ eq $current ? $_ :
4370                 $cgi->a({-href => href(action=>$_)}, $_)
4371         } @ref_views
4372 }
4373
4374 sub format_paging_nav {
4375         my ($action, $page, $has_next_link) = @_;
4376         my $paging_nav;
4377
4378
4379         if ($page > 0) {
4380                 $paging_nav .=
4381                         $cgi->a({-href => href(-replay=>1, page=>undef)}, "first") .
4382                         " &sdot; " .
4383                         $cgi->a({-href => href(-replay=>1, page=>$page-1),
4384                                  -accesskey => "p", -title => "Alt-p"}, "prev");
4385         } else {
4386                 $paging_nav .= "first &sdot; prev";
4387         }
4388
4389         if ($has_next_link) {
4390                 $paging_nav .= " &sdot; " .
4391                         $cgi->a({-href => href(-replay=>1, page=>$page+1),
4392                                  -accesskey => "n", -title => "Alt-n"}, "next");
4393         } else {
4394                 $paging_nav .= " &sdot; next";
4395         }
4396
4397         return $paging_nav;
4398 }
4399
4400 ## ......................................................................
4401 ## functions printing or outputting HTML: div
4402
4403 sub git_print_header_div {
4404         my ($action, $title, $hash, $hash_base) = @_;
4405         my %args = ();
4406
4407         $args{'action'} = $action;
4408         $args{'hash'} = $hash if $hash;
4409         $args{'hash_base'} = $hash_base if $hash_base;
4410
4411         print "<div class=\"header\">\n" .
4412               $cgi->a({-href => href(%args), -class => "title"},
4413               $title ? $title : $action) .
4414               "\n</div>\n";
4415 }
4416
4417 sub format_repo_url {
4418         my ($name, $url) = @_;
4419         return "<tr class=\"metadata_url\"><td>$name</td><td>$url</td></tr>\n";
4420 }
4421
4422 # Group output by placing it in a DIV element and adding a header.
4423 # Options for start_div() can be provided by passing a hash reference as the
4424 # first parameter to the function.
4425 # Options to git_print_header_div() can be provided by passing an array
4426 # reference. This must follow the options to start_div if they are present.
4427 # The content can be a scalar, which is output as-is, a scalar reference, which
4428 # is output after html escaping, an IO handle passed either as *handle or
4429 # *handle{IO}, or a function reference. In the latter case all following
4430 # parameters will be taken as argument to the content function call.
4431 sub git_print_section {
4432         my ($div_args, $header_args, $content);
4433         my $arg = shift;
4434         if (ref($arg) eq 'HASH') {
4435                 $div_args = $arg;
4436                 $arg = shift;
4437         }
4438         if (ref($arg) eq 'ARRAY') {
4439                 $header_args = $arg;
4440                 $arg = shift;
4441         }
4442         $content = $arg;
4443
4444         print $cgi->start_div($div_args);
4445         git_print_header_div(@$header_args);
4446
4447         if (ref($content) eq 'CODE') {
4448                 $content->(@_);
4449         } elsif (ref($content) eq 'SCALAR') {
4450                 print esc_html($$content);
4451         } elsif (ref($content) eq 'GLOB' or ref($content) eq 'IO::Handle') {
4452                 print <$content>;
4453         } elsif (!ref($content) && defined($content)) {
4454                 print $content;
4455         }
4456
4457         print $cgi->end_div;
4458 }
4459
4460 sub format_timestamp_html {
4461         my $date = shift;
4462         my $strtime = $date->{'rfc2822'};
4463
4464         my (undef, undef, $datetime_class) =
4465                 gitweb_get_feature('javascript-timezone');
4466         if ($datetime_class) {
4467                 $strtime = qq!<span class="$datetime_class">$strtime</span>!;
4468         }
4469
4470         my $localtime_format = '(%02d:%02d %s)';
4471         if ($date->{'hour_local'} < 6) {
4472                 $localtime_format = '(<span class="atnight">%02d:%02d</span> %s)';
4473         }
4474         $strtime .= ' ' .
4475                     sprintf($localtime_format,
4476                             $date->{'hour_local'}, $date->{'minute_local'}, $date->{'tz_local'});
4477
4478         return $strtime;
4479 }
4480
4481 # Outputs the author name and date in long form
4482 sub git_print_authorship {
4483         my $co = shift;
4484         my %opts = @_;
4485         my $tag = $opts{-tag} || 'div';
4486         my $author = $co->{'author_name'};
4487
4488         my %ad = parse_date($co->{'author_epoch'}, $co->{'author_tz'});
4489         print "<$tag class=\"author_date\">" .
4490               format_search_author($author, "author", esc_html($author)) .
4491               " [".format_timestamp_html(\%ad)."]".
4492               git_get_avatar($co->{'author_email'}, -pad_before => 1) .
4493               "</$tag>\n";
4494 }
4495
4496 # Outputs table rows containing the full author or committer information,
4497 # in the format expected for 'commit' view (& similar).
4498 # Parameters are a commit hash reference, followed by the list of people
4499 # to output information for. If the list is empty it defaults to both
4500 # author and committer.
4501 sub git_print_authorship_rows {
4502         my $co = shift;
4503         # too bad we can't use @people = @_ || ('author', 'committer')
4504         my @people = @_;
4505         @people = ('author', 'committer') unless @people;
4506         foreach my $who (@people) {
4507                 my %wd = parse_date($co->{"${who}_epoch"}, $co->{"${who}_tz"});
4508                 print "<tr><td>$who</td><td>" .
4509                       format_search_author($co->{"${who}_name"}, $who,
4510                                            esc_html($co->{"${who}_name"})) . " " .
4511                       format_search_author($co->{"${who}_email"}, $who,
4512                                            esc_html("<" . $co->{"${who}_email"} . ">")) .
4513                       "</td><td rowspan=\"2\">" .
4514                       git_get_avatar($co->{"${who}_email"}, -size => 'double') .
4515                       "</td></tr>\n" .
4516                       "<tr>" .
4517                       "<td></td><td>" .
4518                       format_timestamp_html(\%wd) .
4519                       "</td>" .
4520                       "</tr>\n";
4521         }
4522 }
4523
4524 sub git_print_page_path {
4525         my $name = shift;
4526         my $type = shift;
4527         my $hb = shift;
4528
4529
4530         print "<div class=\"page_path\">";
4531         print $cgi->a({-href => href(action=>"tree", hash_base=>$hb),
4532                       -title => 'tree root'}, to_utf8("[$project]"));
4533         print " / ";
4534         if (defined $name) {
4535                 my @dirname = split '/', $name;
4536                 my $basename = pop @dirname;
4537                 my $fullname = '';
4538
4539                 foreach my $dir (@dirname) {
4540                         $fullname .= ($fullname ? '/' : '') . $dir;
4541                         print $cgi->a({-href => href(action=>"tree", file_name=>$fullname,
4542                                                      hash_base=>$hb),
4543                                       -title => $fullname}, esc_path($dir));
4544                         print " / ";
4545                 }
4546                 if (defined $type && $type eq 'blob') {
4547                         print $cgi->a({-href => href(action=>"blob_plain", file_name=>$file_name,
4548                                                      hash_base=>$hb),
4549                                       -title => $name}, esc_path($basename));
4550                 } elsif (defined $type && $type eq 'tree') {
4551                         print $cgi->a({-href => href(action=>"tree", file_name=>$file_name,
4552                                                      hash_base=>$hb),
4553                                       -title => $name}, esc_path($basename));
4554                         print " / ";
4555                 } else {
4556                         print esc_path($basename);
4557                 }
4558         }
4559         print "<br/></div>\n";
4560 }
4561
4562 sub git_print_log {
4563         my $log = shift;
4564         my %opts = @_;
4565
4566         if ($opts{'-remove_title'}) {
4567                 # remove title, i.e. first line of log
4568                 shift @$log;
4569         }
4570         # remove leading empty lines
4571         while (defined $log->[0] && $log->[0] eq "") {
4572                 shift @$log;
4573         }
4574
4575         # print log
4576         my $skip_blank_line = 0;
4577         foreach my $line (@$log) {
4578                 if ($line =~ m/^\s*([A-Z][-A-Za-z]*-[Bb]y|C[Cc]): /) {
4579                         if (! $opts{'-remove_signoff'}) {
4580                                 print "<span class=\"signoff\">" . esc_html($line) . "</span><br/>\n";
4581                                 $skip_blank_line = 1;
4582                         }
4583                         next;
4584                 }
4585
4586                 if ($line =~ m,\s*([a-z]*link): (https?://\S+),i) {
4587                         if (! $opts{'-remove_signoff'}) {
4588                                 print "<span class=\"signoff\">" . esc_html($1) . ": " .
4589                                         "<a href=\"" . esc_html($2) . "\">" . esc_html($2) . "</a>" .
4590                                         "</span><br/>\n";
4591                                 $skip_blank_line = 1;
4592                         }
4593                         next;
4594                 }
4595
4596                 # print only one empty line
4597                 # do not print empty line after signoff
4598                 if ($line eq "") {
4599                         next if ($skip_blank_line);
4600                         $skip_blank_line = 1;
4601                 } else {
4602                         $skip_blank_line = 0;
4603                 }
4604
4605                 print format_log_line_html($line) . "<br/>\n";
4606         }
4607
4608         if ($opts{'-final_empty_line'}) {
4609                 # end with single empty line
4610                 print "<br/>\n" unless $skip_blank_line;
4611         }
4612 }
4613
4614 # return link target (what link points to)
4615 sub git_get_link_target {
4616         my $hash = shift;
4617         my $link_target;
4618
4619         # read link
4620         open my $fd, "-|", git_cmd(), "cat-file", "blob", $hash
4621                 or return;
4622         {
4623                 local $/ = undef;
4624                 $link_target = <$fd>;
4625         }
4626         close $fd
4627                 or return;
4628
4629         return $link_target;
4630 }
4631
4632 # given link target, and the directory (basedir) the link is in,
4633 # return target of link relative to top directory (top tree);
4634 # return undef if it is not possible (including absolute links).
4635 sub normalize_link_target {
4636         my ($link_target, $basedir) = @_;
4637
4638         # absolute symlinks (beginning with '/') cannot be normalized
4639         return if (substr($link_target, 0, 1) eq '/');
4640
4641         # normalize link target to path from top (root) tree (dir)
4642         my $path;
4643         if ($basedir) {
4644                 $path = $basedir . '/' . $link_target;
4645         } else {
4646                 # we are in top (root) tree (dir)
4647                 $path = $link_target;
4648         }
4649
4650         # remove //, /./, and /../
4651         my @path_parts;
4652         foreach my $part (split('/', $path)) {
4653                 # discard '.' and ''
4654                 next if (!$part || $part eq '.');
4655                 # handle '..'
4656                 if ($part eq '..') {
4657                         if (@path_parts) {
4658                                 pop @path_parts;
4659                         } else {
4660                                 # link leads outside repository (outside top dir)
4661                                 return;
4662                         }
4663                 } else {
4664                         push @path_parts, $part;
4665                 }
4666         }
4667         $path = join('/', @path_parts);
4668
4669         return $path;
4670 }
4671
4672 # print tree entry (row of git_tree), but without encompassing <tr> element
4673 sub git_print_tree_entry {
4674         my ($t, $basedir, $hash_base, $have_blame) = @_;
4675
4676         my %base_key = ();
4677         $base_key{'hash_base'} = $hash_base if defined $hash_base;
4678
4679         # The format of a table row is: mode list link.  Where mode is
4680         # the mode of the entry, list is the name of the entry, an href,
4681         # and link is the action links of the entry.
4682
4683         print "<td class=\"mode\">" . mode_str($t->{'mode'}) . "</td>\n";
4684         if (exists $t->{'size'}) {
4685                 print "<td class=\"size\">$t->{'size'}</td>\n";
4686         }
4687         if ($t->{'type'} eq "blob") {
4688                 print "<td class=\"list\">" .
4689                         $cgi->a({-href => href(action=>"blob", hash=>$t->{'hash'},
4690                                                file_name=>"$basedir$t->{'name'}", %base_key),
4691                                 -class => "list"}, esc_path($t->{'name'}));
4692                 if (S_ISLNK(oct $t->{'mode'})) {
4693                         my $link_target = git_get_link_target($t->{'hash'});
4694                         if ($link_target) {
4695                                 my $norm_target = normalize_link_target($link_target, $basedir);
4696                                 if (defined $norm_target) {
4697                                         print " -> " .
4698                                               $cgi->a({-href => href(action=>"object", hash_base=>$hash_base,
4699                                                                      file_name=>$norm_target),
4700                                                        -title => $norm_target}, esc_path($link_target));
4701                                 } else {
4702                                         print " -> " . esc_path($link_target);
4703                                 }
4704                         }
4705                 }
4706                 print "</td>\n";
4707                 print "<td class=\"link\">";
4708                 print $cgi->a({-href => href(action=>"blob", hash=>$t->{'hash'},
4709                                              file_name=>"$basedir$t->{'name'}", %base_key)},
4710                               "blob");
4711                 if ($have_blame) {
4712                         print " | " .
4713                               $cgi->a({-href => href(action=>"blame", hash=>$t->{'hash'},
4714                                                      file_name=>"$basedir$t->{'name'}", %base_key)},
4715                                       "blame");
4716                 }
4717                 if (defined $hash_base) {
4718                         print " | " .
4719                               $cgi->a({-href => href(action=>"history", hash_base=>$hash_base,
4720                                                      hash=>$t->{'hash'}, file_name=>"$basedir$t->{'name'}")},
4721                                       "history");
4722                 }
4723                 print " | " .
4724                         $cgi->a({-href => href(action=>"blob_plain", hash_base=>$hash_base,
4725                                                file_name=>"$basedir$t->{'name'}")},
4726                                 "raw");
4727                 print "</td>\n";
4728
4729         } elsif ($t->{'type'} eq "tree") {
4730                 print "<td class=\"list\">";
4731                 print $cgi->a({-href => href(action=>"tree", hash=>$t->{'hash'},
4732                                              file_name=>"$basedir$t->{'name'}",
4733                                              %base_key)},
4734                               esc_path($t->{'name'}));
4735                 print "</td>\n";
4736                 print "<td class=\"link\">";
4737                 print $cgi->a({-href => href(action=>"tree", hash=>$t->{'hash'},
4738                                              file_name=>"$basedir$t->{'name'}",
4739                                              %base_key)},
4740                               "tree");
4741                 if (defined $hash_base) {
4742                         print " | " .
4743                               $cgi->a({-href => href(action=>"history", hash_base=>$hash_base,
4744                                                      file_name=>"$basedir$t->{'name'}")},
4745                                       "history");
4746                 }
4747                 print "</td>\n";
4748         } else {
4749                 # unknown object: we can only present history for it
4750                 # (this includes 'commit' object, i.e. submodule support)
4751                 print "<td class=\"list\">" .
4752                       esc_path($t->{'name'}) .
4753                       "</td>\n";
4754                 print "<td class=\"link\">";
4755                 if (defined $hash_base) {
4756                         print $cgi->a({-href => href(action=>"history",
4757                                                      hash_base=>$hash_base,
4758                                                      file_name=>"$basedir$t->{'name'}")},
4759                                       "history");
4760                 }
4761                 print "</td>\n";
4762         }
4763 }
4764
4765 ## ......................................................................
4766 ## functions printing large fragments of HTML
4767
4768 # get pre-image filenames for merge (combined) diff
4769 sub fill_from_file_info {
4770         my ($diff, @parents) = @_;
4771
4772         $diff->{'from_file'} = [ ];
4773         $diff->{'from_file'}[$diff->{'nparents'} - 1] = undef;
4774         for (my $i = 0; $i < $diff->{'nparents'}; $i++) {
4775                 if ($diff->{'status'}[$i] eq 'R' ||
4776                     $diff->{'status'}[$i] eq 'C') {
4777                         $diff->{'from_file'}[$i] =
4778                                 git_get_path_by_hash($parents[$i], $diff->{'from_id'}[$i]);
4779                 }
4780         }
4781
4782         return $diff;
4783 }
4784
4785 # is current raw difftree line of file deletion
4786 sub is_deleted {
4787         my $diffinfo = shift;
4788
4789         return $diffinfo->{'to_id'} eq ('0' x 40);
4790 }
4791
4792 # does patch correspond to [previous] difftree raw line
4793 # $diffinfo  - hashref of parsed raw diff format
4794 # $patchinfo - hashref of parsed patch diff format
4795 #              (the same keys as in $diffinfo)
4796 sub is_patch_split {
4797         my ($diffinfo, $patchinfo) = @_;
4798
4799         return defined $diffinfo && defined $patchinfo
4800                 && $diffinfo->{'to_file'} eq $patchinfo->{'to_file'};
4801 }
4802
4803
4804 sub git_difftree_body {
4805         my ($difftree, $hash, @parents) = @_;
4806         my ($parent) = $parents[0];
4807         my $have_blame = gitweb_check_feature('blame');
4808         print "<div class=\"list_head\">\n";
4809         if ($#{$difftree} > 10) {
4810                 print(($#{$difftree} + 1) . " files changed:\n");
4811         }
4812         print "</div>\n";
4813
4814         print "<table class=\"" .
4815               (@parents > 1 ? "combined " : "") .
4816               "diff_tree\">\n";
4817
4818         # header only for combined diff in 'commitdiff' view
4819         my $has_header = @$difftree && @parents > 1 && $action eq 'commitdiff';
4820         if ($has_header) {
4821                 # table header
4822                 print "<thead><tr>\n" .
4823                        "<th></th><th></th>\n"; # filename, patchN link
4824                 for (my $i = 0; $i < @parents; $i++) {
4825                         my $par = $parents[$i];
4826                         print "<th>" .
4827                               $cgi->a({-href => href(action=>"commitdiff",
4828                                                      hash=>$hash, hash_parent=>$par),
4829                                        -title => 'commitdiff to parent number ' .
4830                                                   ($i+1) . ': ' . substr($par,0,7)},
4831                                       $i+1) .
4832                               "&nbsp;</th>\n";
4833                 }
4834                 print "</tr></thead>\n<tbody>\n";
4835         }
4836
4837         my $alternate = 1;
4838         my $patchno = 0;
4839         foreach my $line (@{$difftree}) {
4840                 my $diff = parsed_difftree_line($line);
4841
4842                 if ($alternate) {
4843                         print "<tr class=\"dark\">\n";
4844                 } else {
4845                         print "<tr class=\"light\">\n";
4846                 }
4847                 $alternate ^= 1;
4848
4849                 if (exists $diff->{'nparents'}) { # combined diff
4850
4851                         fill_from_file_info($diff, @parents)
4852                                 unless exists $diff->{'from_file'};
4853
4854                         if (!is_deleted($diff)) {
4855                                 # file exists in the result (child) commit
4856                                 print "<td>" .
4857                                       $cgi->a({-href => href(action=>"blob", hash=>$diff->{'to_id'},
4858                                                              file_name=>$diff->{'to_file'},
4859                                                              hash_base=>$hash),
4860                                               -class => "list"}, esc_path($diff->{'to_file'})) .
4861                                       "</td>\n";
4862                         } else {
4863                                 print "<td>" .
4864                                       esc_path($diff->{'to_file'}) .
4865                                       "</td>\n";
4866                         }
4867
4868                         if ($action eq 'commitdiff') {
4869                                 # link to patch
4870                                 $patchno++;
4871                                 print "<td class=\"link\">" .
4872                                       $cgi->a({-href => href(-anchor=>"patch$patchno")},
4873                                               "patch") .
4874                                       " | " .
4875                                       "</td>\n";
4876                         }
4877
4878                         my $has_history = 0;
4879                         my $not_deleted = 0;
4880                         for (my $i = 0; $i < $diff->{'nparents'}; $i++) {
4881                                 my $hash_parent = $parents[$i];
4882                                 my $from_hash = $diff->{'from_id'}[$i];
4883                                 my $from_path = $diff->{'from_file'}[$i];
4884                                 my $status = $diff->{'status'}[$i];
4885
4886                                 $has_history ||= ($status ne 'A');
4887                                 $not_deleted ||= ($status ne 'D');
4888
4889                                 if ($status eq 'A') {
4890                                         print "<td  class=\"link\" align=\"right\"> | </td>\n";
4891                                 } elsif ($status eq 'D') {
4892                                         print "<td class=\"link\">" .
4893                                               $cgi->a({-href => href(action=>"blob",
4894                                                                      hash_base=>$hash,
4895                                                                      hash=>$from_hash,
4896                                                                      file_name=>$from_path)},
4897                                                       "blob" . ($i+1)) .
4898                                               " | </td>\n";
4899                                 } else {
4900                                         if ($diff->{'to_id'} eq $from_hash) {
4901                                                 print "<td class=\"link nochange\">";
4902                                         } else {
4903                                                 print "<td class=\"link\">";
4904                                         }
4905                                         print $cgi->a({-href => href(action=>"blobdiff",
4906                                                                      hash=>$diff->{'to_id'},
4907                                                                      hash_parent=>$from_hash,
4908                                                                      hash_base=>$hash,
4909                                                                      hash_parent_base=>$hash_parent,
4910                                                                      file_name=>$diff->{'to_file'},
4911                                                                      file_parent=>$from_path)},
4912                                                       "diff" . ($i+1)) .
4913                                               " | </td>\n";
4914                                 }
4915                         }
4916
4917                         print "<td class=\"link\">";
4918                         if ($not_deleted) {
4919                                 print $cgi->a({-href => href(action=>"blob",
4920                                                              hash=>$diff->{'to_id'},
4921                                                              file_name=>$diff->{'to_file'},
4922                                                              hash_base=>$hash)},
4923                                               "blob");
4924                                 print " | " if ($has_history);
4925                         }
4926                         if ($has_history) {
4927                                 print $cgi->a({-href => href(action=>"history",
4928                                                              file_name=>$diff->{'to_file'},
4929                                                              hash_base=>$hash)},
4930                                               "history");
4931                         }
4932                         print "</td>\n";
4933
4934                         print "</tr>\n";
4935                         next; # instead of 'else' clause, to avoid extra indent
4936                 }
4937                 # else ordinary diff
4938
4939                 my ($to_mode_oct, $to_mode_str, $to_file_type);
4940                 my ($from_mode_oct, $from_mode_str, $from_file_type);
4941                 if ($diff->{'to_mode'} ne ('0' x 6)) {
4942                         $to_mode_oct = oct $diff->{'to_mode'};
4943                         if (S_ISREG($to_mode_oct)) { # only for regular file
4944                                 $to_mode_str = sprintf("%04o", $to_mode_oct & 0777); # permission bits
4945                         }
4946                         $to_file_type = file_type($diff->{'to_mode'});
4947                 }
4948                 if ($diff->{'from_mode'} ne ('0' x 6)) {
4949                         $from_mode_oct = oct $diff->{'from_mode'};
4950                         if (S_ISREG($from_mode_oct)) { # only for regular file
4951                                 $from_mode_str = sprintf("%04o", $from_mode_oct & 0777); # permission bits
4952                         }
4953                         $from_file_type = file_type($diff->{'from_mode'});
4954                 }
4955
4956                 if ($diff->{'status'} eq "A") { # created
4957                         my $mode_chng = "<span class=\"file_status new\">[new $to_file_type";
4958                         $mode_chng   .= " with mode: $to_mode_str" if $to_mode_str;
4959                         $mode_chng   .= "]</span>";
4960                         print "<td>";
4961                         print $cgi->a({-href => href(action=>"blob", hash=>$diff->{'to_id'},
4962                                                      hash_base=>$hash, file_name=>$diff->{'file'}),
4963                                       -class => "list"}, esc_path($diff->{'file'}));
4964                         print "</td>\n";
4965                         print "<td>$mode_chng</td>\n";
4966                         print "<td class=\"link\">";
4967                         if ($action eq 'commitdiff') {
4968                                 # link to patch
4969                                 $patchno++;
4970                                 print $cgi->a({-href => href(-anchor=>"patch$patchno")},
4971                                               "patch") .
4972                                       " | ";
4973                         }
4974                         print $cgi->a({-href => href(action=>"blob", hash=>$diff->{'to_id'},
4975                                                      hash_base=>$hash, file_name=>$diff->{'file'})},
4976                                       "blob");
4977                         print "</td>\n";
4978
4979                 } elsif ($diff->{'status'} eq "D") { # deleted
4980                         my $mode_chng = "<span class=\"file_status deleted\">[deleted $from_file_type]</span>";
4981                         print "<td>";
4982                         print $cgi->a({-href => href(action=>"blob", hash=>$diff->{'from_id'},
4983                                                      hash_base=>$parent, file_name=>$diff->{'file'}),
4984                                        -class => "list"}, esc_path($diff->{'file'}));
4985                         print "</td>\n";
4986                         print "<td>$mode_chng</td>\n";
4987                         print "<td class=\"link\">";
4988                         if ($action eq 'commitdiff') {
4989                                 # link to patch
4990                                 $patchno++;
4991                                 print $cgi->a({-href => href(-anchor=>"patch$patchno")},
4992                                               "patch") .
4993                                       " | ";
4994                         }
4995                         print $cgi->a({-href => href(action=>"blob", hash=>$diff->{'from_id'},
4996                                                      hash_base=>$parent, file_name=>$diff->{'file'})},
4997                                       "blob") . " | ";
4998                         if ($have_blame) {
4999                                 print $cgi->a({-href => href(action=>"blame", hash_base=>$parent,
5000                                                              file_name=>$diff->{'file'})},
5001                                               "blame") . " | ";
5002                         }
5003                         print $cgi->a({-href => href(action=>"history", hash_base=>$parent,
5004                                                      file_name=>$diff->{'file'})},
5005                                       "history");
5006                         print "</td>\n";
5007
5008                 } elsif ($diff->{'status'} eq "M" || $diff->{'status'} eq "T") { # modified, or type changed
5009                         my $mode_chnge = "";
5010                         if ($diff->{'from_mode'} != $diff->{'to_mode'}) {
5011                                 $mode_chnge = "<span class=\"file_status mode_chnge\">[changed";
5012                                 if ($from_file_type ne $to_file_type) {
5013                                         $mode_chnge .= " from $from_file_type to $to_file_type";
5014                                 }
5015                                 if (($from_mode_oct & 0777) != ($to_mode_oct & 0777)) {
5016                                         if ($from_mode_str && $to_mode_str) {
5017                                                 $mode_chnge .= " mode: $from_mode_str->$to_mode_str";
5018                                         } elsif ($to_mode_str) {
5019                                                 $mode_chnge .= " mode: $to_mode_str";
5020                                         }
5021                                 }
5022                                 $mode_chnge .= "]</span>\n";
5023                         }
5024                         print "<td>";
5025                         print $cgi->a({-href => href(action=>"blob", hash=>$diff->{'to_id'},
5026                                                      hash_base=>$hash, file_name=>$diff->{'file'}),
5027                                       -class => "list"}, esc_path($diff->{'file'}));
5028                         print "</td>\n";
5029                         print "<td>$mode_chnge</td>\n";
5030                         print "<td class=\"link\">";
5031                         if ($action eq 'commitdiff') {
5032                                 # link to patch
5033                                 $patchno++;
5034                                 print $cgi->a({-href => href(-anchor=>"patch$patchno")},
5035                                               "patch") .
5036                                       " | ";
5037                         } elsif ($diff->{'to_id'} ne $diff->{'from_id'}) {
5038                                 # "commit" view and modified file (not onlu mode changed)
5039                                 print $cgi->a({-href => href(action=>"blobdiff",
5040                                                              hash=>$diff->{'to_id'}, hash_parent=>$diff->{'from_id'},
5041                                                              hash_base=>$hash, hash_parent_base=>$parent,
5042                                                              file_name=>$diff->{'file'})},
5043                                               "diff") .
5044                                       " | ";
5045                         }
5046                         print $cgi->a({-href => href(action=>"blob", hash=>$diff->{'to_id'},
5047                                                      hash_base=>$hash, file_name=>$diff->{'file'})},
5048                                        "blob") . " | ";
5049                         if ($have_blame) {
5050                                 print $cgi->a({-href => href(action=>"blame", hash_base=>$hash,
5051                                                              file_name=>$diff->{'file'})},
5052                                               "blame") . " | ";
5053                         }
5054                         print $cgi->a({-href => href(action=>"history", hash_base=>$hash,
5055                                                      file_name=>$diff->{'file'})},
5056                                       "history");
5057                         print "</td>\n";
5058
5059                 } elsif ($diff->{'status'} eq "R" || $diff->{'status'} eq "C") { # renamed or copied
5060                         my %status_name = ('R' => 'moved', 'C' => 'copied');
5061                         my $nstatus = $status_name{$diff->{'status'}};
5062                         my $mode_chng = "";
5063                         if ($diff->{'from_mode'} != $diff->{'to_mode'}) {
5064                                 # mode also for directories, so we cannot use $to_mode_str
5065                                 $mode_chng = sprintf(", mode: %04o", $to_mode_oct & 0777);
5066                         }
5067                         print "<td>" .
5068                               $cgi->a({-href => href(action=>"blob", hash_base=>$hash,
5069                                                      hash=>$diff->{'to_id'}, file_name=>$diff->{'to_file'}),
5070                                       -class => "list"}, esc_path($diff->{'to_file'})) . "</td>\n" .
5071                               "<td><span class=\"file_status $nstatus\">[$nstatus from " .
5072                               $cgi->a({-href => href(action=>"blob", hash_base=>$parent,
5073                                                      hash=>$diff->{'from_id'}, file_name=>$diff->{'from_file'}),
5074                                       -class => "list"}, esc_path($diff->{'from_file'})) .
5075                               " with " . (int $diff->{'similarity'}) . "% similarity$mode_chng]</span></td>\n" .
5076                               "<td class=\"link\">";
5077                         if ($action eq 'commitdiff') {
5078                                 # link to patch
5079                                 $patchno++;
5080                                 print $cgi->a({-href => href(-anchor=>"patch$patchno")},
5081                                               "patch") .
5082                                       " | ";
5083                         } elsif ($diff->{'to_id'} ne $diff->{'from_id'}) {
5084                                 # "commit" view and modified file (not only pure rename or copy)
5085                                 print $cgi->a({-href => href(action=>"blobdiff",
5086                                                              hash=>$diff->{'to_id'}, hash_parent=>$diff->{'from_id'},
5087                                                              hash_base=>$hash, hash_parent_base=>$parent,
5088                                                              file_name=>$diff->{'to_file'}, file_parent=>$diff->{'from_file'})},
5089                                               "diff") .
5090                                       " | ";
5091                         }
5092                         print $cgi->a({-href => href(action=>"blob", hash=>$diff->{'to_id'},
5093                                                      hash_base=>$parent, file_name=>$diff->{'to_file'})},
5094                                       "blob") . " | ";
5095                         if ($have_blame) {
5096                                 print $cgi->a({-href => href(action=>"blame", hash_base=>$hash,
5097                                                              file_name=>$diff->{'to_file'})},
5098                                               "blame") . " | ";
5099                         }
5100                         print $cgi->a({-href => href(action=>"history", hash_base=>$hash,
5101                                                     file_name=>$diff->{'to_file'})},
5102                                       "history");
5103                         print "</td>\n";
5104
5105                 } # we should not encounter Unmerged (U) or Unknown (X) status
5106                 print "</tr>\n";
5107         }
5108         print "</tbody>" if $has_header;
5109         print "</table>\n";
5110 }
5111
5112 # Print context lines and then rem/add lines in a side-by-side manner.
5113 sub print_sidebyside_diff_lines {
5114         my ($ctx, $rem, $add) = @_;
5115
5116         # print context block before add/rem block
5117         if (@$ctx) {
5118                 print join '',
5119                         '<div class="chunk_block ctx">',
5120                                 '<div class="old">',
5121                                 @$ctx,
5122                                 '</div>',
5123                                 '<div class="new">',
5124                                 @$ctx,
5125                                 '</div>',
5126                         '</div>';
5127         }
5128
5129         if (!@$add) {
5130                 # pure removal
5131                 print join '',
5132                         '<div class="chunk_block rem">',
5133                                 '<div class="old">',
5134                                 @$rem,
5135                                 '</div>',
5136                         '</div>';
5137         } elsif (!@$rem) {
5138                 # pure addition
5139                 print join '',
5140                         '<div class="chunk_block add">',
5141                                 '<div class="new">',
5142                                 @$add,
5143                                 '</div>',
5144                         '</div>';
5145         } else {
5146                 print join '',
5147                         '<div class="chunk_block chg">',
5148                                 '<div class="old">',
5149                                 @$rem,
5150                                 '</div>',
5151                                 '<div class="new">',
5152                                 @$add,
5153                                 '</div>',
5154                         '</div>';
5155         }
5156 }
5157
5158 # Print context lines and then rem/add lines in inline manner.
5159 sub print_inline_diff_lines {
5160         my ($ctx, $rem, $add) = @_;
5161
5162         print @$ctx, @$rem, @$add;
5163 }
5164
5165 # Format removed and added line, mark changed part and HTML-format them.
5166 # Implementation is based on contrib/diff-highlight
5167 sub format_rem_add_lines_pair {
5168         my ($rem, $add, $num_parents) = @_;
5169
5170         # We need to untabify lines before split()'ing them;
5171         # otherwise offsets would be invalid.
5172         chomp $rem;
5173         chomp $add;
5174         $rem = untabify($rem);
5175         $add = untabify($add);
5176
5177         my @rem = split(//, $rem);
5178         my @add = split(//, $add);
5179         my ($esc_rem, $esc_add);
5180         # Ignore leading +/- characters for each parent.
5181         my ($prefix_len, $suffix_len) = ($num_parents, 0);
5182         my ($prefix_has_nonspace, $suffix_has_nonspace);
5183
5184         my $shorter = (@rem < @add) ? @rem : @add;
5185         while ($prefix_len < $shorter) {
5186                 last if ($rem[$prefix_len] ne $add[$prefix_len]);
5187
5188                 $prefix_has_nonspace = 1 if ($rem[$prefix_len] !~ /\s/);
5189                 $prefix_len++;
5190         }
5191
5192         while ($prefix_len + $suffix_len < $shorter) {
5193                 last if ($rem[-1 - $suffix_len] ne $add[-1 - $suffix_len]);
5194
5195                 $suffix_has_nonspace = 1 if ($rem[-1 - $suffix_len] !~ /\s/);
5196                 $suffix_len++;
5197         }
5198
5199         # Mark lines that are different from each other, but have some common
5200         # part that isn't whitespace.  If lines are completely different, don't
5201         # mark them because that would make output unreadable, especially if
5202         # diff consists of multiple lines.
5203         if ($prefix_has_nonspace || $suffix_has_nonspace) {
5204                 $esc_rem = esc_html_hl_regions($rem, 'marked',
5205                         [$prefix_len, @rem - $suffix_len], -nbsp=>1);
5206                 $esc_add = esc_html_hl_regions($add, 'marked',
5207                         [$prefix_len, @add - $suffix_len], -nbsp=>1);
5208         } else {
5209                 $esc_rem = esc_html($rem, -nbsp=>1);
5210                 $esc_add = esc_html($add, -nbsp=>1);
5211         }
5212
5213         return format_diff_line(\$esc_rem, 'rem'),
5214                format_diff_line(\$esc_add, 'add');
5215 }
5216
5217 # HTML-format diff context, removed and added lines.
5218 sub format_ctx_rem_add_lines {
5219         my ($ctx, $rem, $add, $num_parents) = @_;
5220         my (@new_ctx, @new_rem, @new_add);
5221         my $can_highlight = 0;
5222         my $is_combined = ($num_parents > 1);
5223
5224         # Highlight if every removed line has a corresponding added line.
5225         if (@$add > 0 && @$add == @$rem) {
5226                 $can_highlight = 1;
5227
5228                 # Highlight lines in combined diff only if the chunk contains
5229                 # diff between the same version, e.g.
5230                 #
5231                 #    - a
5232                 #   -  b
5233                 #    + c
5234                 #   +  d
5235                 #
5236                 # Otherwise the highlightling would be confusing.
5237                 if ($is_combined) {
5238                         for (my $i = 0; $i < @$add; $i++) {
5239                                 my $prefix_rem = substr($rem->[$i], 0, $num_parents);
5240                                 my $prefix_add = substr($add->[$i], 0, $num_parents);
5241
5242                                 $prefix_rem =~ s/-/+/g;
5243
5244                                 if ($prefix_rem ne $prefix_add) {
5245                                         $can_highlight = 0;
5246                                         last;
5247                                 }
5248                         }
5249                 }
5250         }
5251
5252         if ($can_highlight) {
5253                 for (my $i = 0; $i < @$add; $i++) {
5254                         my ($line_rem, $line_add) = format_rem_add_lines_pair(
5255                                 $rem->[$i], $add->[$i], $num_parents);
5256                         push @new_rem, $line_rem;
5257                         push @new_add, $line_add;
5258                 }
5259         } else {
5260                 @new_rem = map { format_diff_line($_, 'rem') } @$rem;
5261                 @new_add = map { format_diff_line($_, 'add') } @$add;
5262         }
5263
5264         @new_ctx = map { format_diff_line($_, 'ctx') } @$ctx;
5265
5266         return (\@new_ctx, \@new_rem, \@new_add);
5267 }
5268
5269 # Print context lines and then rem/add lines.
5270 sub print_diff_lines {
5271         my ($ctx, $rem, $add, $diff_style, $num_parents) = @_;
5272         my $is_combined = $num_parents > 1;
5273
5274         ($ctx, $rem, $add) = format_ctx_rem_add_lines($ctx, $rem, $add,
5275                 $num_parents);
5276
5277         if ($diff_style eq 'sidebyside' && !$is_combined) {
5278                 print_sidebyside_diff_lines($ctx, $rem, $add);
5279         } else {
5280                 # default 'inline' style and unknown styles
5281                 print_inline_diff_lines($ctx, $rem, $add);
5282         }
5283 }
5284
5285 sub print_diff_chunk {
5286         my ($diff_style, $num_parents, $from, $to, @chunk) = @_;
5287         my (@ctx, @rem, @add);
5288
5289         # The class of the previous line.
5290         my $prev_class = '';
5291
5292         return unless @chunk;
5293
5294         # incomplete last line might be among removed or added lines,
5295         # or both, or among context lines: find which
5296         for (my $i = 1; $i < @chunk; $i++) {
5297                 if ($chunk[$i][0] eq 'incomplete') {
5298                         $chunk[$i][0] = $chunk[$i-1][0];
5299                 }
5300         }
5301
5302         # guardian
5303         push @chunk, ["", ""];
5304
5305         foreach my $line_info (@chunk) {
5306                 my ($class, $line) = @$line_info;
5307
5308                 # print chunk headers
5309                 if ($class && $class eq 'chunk_header') {
5310                         print format_diff_line($line, $class, $from, $to);
5311                         next;
5312                 }
5313
5314                 ## print from accumulator when have some add/rem lines or end
5315                 # of chunk (flush context lines), or when have add and rem
5316                 # lines and new block is reached (otherwise add/rem lines could
5317                 # be reordered)
5318                 if (!$class || ((@rem || @add) && $class eq 'ctx') ||
5319                     (@rem && @add && $class ne $prev_class)) {
5320                         print_diff_lines(\@ctx, \@rem, \@add,
5321                                          $diff_style, $num_parents);
5322                         @ctx = @rem = @add = ();
5323                 }
5324
5325                 ## adding lines to accumulator
5326                 # guardian value
5327                 last unless $line;
5328                 # rem, add or change
5329                 if ($class eq 'rem') {
5330                         push @rem, $line;
5331                 } elsif ($class eq 'add') {
5332                         push @add, $line;
5333                 }
5334                 # context line
5335                 if ($class eq 'ctx') {
5336                         push @ctx, $line;
5337                 }
5338
5339                 $prev_class = $class;
5340         }
5341 }
5342
5343 sub git_patchset_body {
5344         my ($fd, $diff_style, $difftree, $hash, @hash_parents) = @_;
5345         my ($hash_parent) = $hash_parents[0];
5346
5347         my $is_combined = (@hash_parents > 1);
5348         my $patch_idx = 0;
5349         my $patch_number = 0;
5350         my $patch_line;
5351         my $diffinfo;
5352         my $to_name;
5353         my (%from, %to);
5354         my @chunk; # for side-by-side diff
5355
5356         print "<div class=\"patchset\">\n";
5357
5358         # skip to first patch
5359         while ($patch_line = <$fd>) {
5360                 chomp $patch_line;
5361
5362                 last if ($patch_line =~ m/^diff /);
5363         }
5364
5365  PATCH:
5366         while ($patch_line) {
5367
5368                 # parse "git diff" header line
5369                 if ($patch_line =~ m/^diff --git (\"(?:[^\\\"]*(?:\\.[^\\\"]*)*)\"|[^ "]*) (.*)$/) {
5370                         # $1 is from_name, which we do not use
5371                         $to_name = unquote($2);
5372                         $to_name =~ s!^b/!!;
5373                 } elsif ($patch_line =~ m/^diff --(cc|combined) ("?.*"?)$/) {
5374                         # $1 is 'cc' or 'combined', which we do not use
5375                         $to_name = unquote($2);
5376                 } else {
5377                         $to_name = undef;
5378                 }
5379
5380                 # check if current patch belong to current raw line
5381                 # and parse raw git-diff line if needed
5382                 if (is_patch_split($diffinfo, { 'to_file' => $to_name })) {
5383                         # this is continuation of a split patch
5384                         print "<div class=\"patch cont\">\n";
5385                 } else {
5386                         # advance raw git-diff output if needed
5387                         $patch_idx++ if defined $diffinfo;
5388
5389                         # read and prepare patch information
5390                         $diffinfo = parsed_difftree_line($difftree->[$patch_idx]);
5391
5392                         # compact combined diff output can have some patches skipped
5393                         # find which patch (using pathname of result) we are at now;
5394                         if ($is_combined) {
5395                                 while ($to_name ne $diffinfo->{'to_file'}) {
5396                                         print "<div class=\"patch\" id=\"patch". ($patch_idx+1) ."\">\n" .
5397                                               format_diff_cc_simplified($diffinfo, @hash_parents) .
5398                                               "</div>\n";  # class="patch"
5399
5400                                         $patch_idx++;
5401                                         $patch_number++;
5402
5403                                         last if $patch_idx > $#$difftree;
5404                                         $diffinfo = parsed_difftree_line($difftree->[$patch_idx]);
5405                                 }
5406                         }
5407
5408                         # modifies %from, %to hashes
5409                         parse_from_to_diffinfo($diffinfo, \%from, \%to, @hash_parents);
5410
5411                         # this is first patch for raw difftree line with $patch_idx index
5412                         # we index @$difftree array from 0, but number patches from 1
5413                         print "<div class=\"patch\" id=\"patch". ($patch_idx+1) ."\">\n";
5414                 }
5415
5416                 # git diff header
5417                 #assert($patch_line =~ m/^diff /) if DEBUG;
5418                 #assert($patch_line !~ m!$/$!) if DEBUG; # is chomp-ed
5419                 $patch_number++;
5420                 # print "git diff" header
5421                 print format_git_diff_header_line($patch_line, $diffinfo,
5422                                                   \%from, \%to);
5423
5424                 # print extended diff header
5425                 print "<div class=\"diff extended_header\">\n";
5426         EXTENDED_HEADER:
5427                 while ($patch_line = <$fd>) {
5428                         chomp $patch_line;
5429
5430                         last EXTENDED_HEADER if ($patch_line =~ m/^--- |^diff /);
5431
5432                         print format_extended_diff_header_line($patch_line, $diffinfo,
5433                                                                \%from, \%to);
5434                 }
5435                 print "</div>\n"; # class="diff extended_header"
5436
5437                 # from-file/to-file diff header
5438                 if (! $patch_line) {
5439                         print "</div>\n"; # class="patch"
5440                         last PATCH;
5441                 }
5442                 next PATCH if ($patch_line =~ m/^diff /);
5443                 #assert($patch_line =~ m/^---/) if DEBUG;
5444
5445                 my $last_patch_line = $patch_line;
5446                 $patch_line = <$fd>;
5447                 chomp $patch_line;
5448                 #assert($patch_line =~ m/^\+\+\+/) if DEBUG;
5449
5450                 print format_diff_from_to_header($last_patch_line, $patch_line,
5451                                                  $diffinfo, \%from, \%to,
5452                                                  @hash_parents);
5453
5454                 # the patch itself
5455         LINE:
5456                 while ($patch_line = <$fd>) {
5457                         chomp $patch_line;
5458
5459                         next PATCH if ($patch_line =~ m/^diff /);
5460
5461                         my $class = diff_line_class($patch_line, \%from, \%to);
5462
5463                         if ($class eq 'chunk_header') {
5464                                 print_diff_chunk($diff_style, scalar @hash_parents, \%from, \%to, @chunk);
5465                                 @chunk = ();
5466                         }
5467
5468                         push @chunk, [ $class, $patch_line ];
5469                 }
5470
5471         } continue {
5472                 if (@chunk) {
5473                         print_diff_chunk($diff_style, scalar @hash_parents, \%from, \%to, @chunk);
5474                         @chunk = ();
5475                 }
5476                 print "</div>\n"; # class="patch"
5477         }
5478
5479         # for compact combined (--cc) format, with chunk and patch simplification
5480         # the patchset might be empty, but there might be unprocessed raw lines
5481         for (++$patch_idx if $patch_number > 0;
5482              $patch_idx < @$difftree;
5483              ++$patch_idx) {
5484                 # read and prepare patch information
5485                 $diffinfo = parsed_difftree_line($difftree->[$patch_idx]);
5486
5487                 # generate anchor for "patch" links in difftree / whatchanged part
5488                 print "<div class=\"patch\" id=\"patch". ($patch_idx+1) ."\">\n" .
5489                       format_diff_cc_simplified($diffinfo, @hash_parents) .
5490                       "</div>\n";  # class="patch"
5491
5492                 $patch_number++;
5493         }
5494
5495         if ($patch_number == 0) {
5496                 if (@hash_parents > 1) {
5497                         print "<div class=\"diff nodifferences\">Trivial merge</div>\n";
5498                 } else {
5499                         print "<div class=\"diff nodifferences\">No differences found</div>\n";
5500                 }
5501         }
5502
5503         print "</div>\n"; # class="patchset"
5504 }
5505
5506 # . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
5507
5508 sub git_project_search_form {
5509         my ($searchtext, $search_use_regexp) = @_;
5510
5511         my $limit = '';
5512         if ($project_filter) {
5513                 $limit = " in '$project_filter/'";
5514         }
5515
5516         print "<div class=\"projsearch\">\n";
5517         print $cgi->start_form(-method => 'get', -action => $my_uri) .
5518               $cgi->hidden(-name => 'a', -value => 'project_list')  . "\n";
5519         print $cgi->hidden(-name => 'pf', -value => $project_filter). "\n"
5520                 if (defined $project_filter);
5521         print $cgi->textfield(-name => 's', -value => $searchtext,
5522                               -title => "Search project by name and description$limit",
5523                               -size => 60) . "\n" .
5524               "<span title=\"Extended regular expression\">" .
5525               $cgi->checkbox(-name => 'sr', -value => 1, -label => 're',
5526                              -checked => $search_use_regexp) .
5527               "</span>\n" .
5528               $cgi->submit(-name => 'btnS', -value => 'Search') .
5529               $cgi->end_form() . "\n" .
5530               $cgi->a({-href => href(project => undef, searchtext => undef,
5531                                      project_filter => $project_filter)},
5532                       esc_html("List all projects$limit")) . "<br />\n";
5533         print "</div>\n";
5534 }
5535
5536 # entry for given @keys needs filling if at least one of keys in list
5537 # is not present in %$project_info
5538 sub project_info_needs_filling {
5539         my ($project_info, @keys) = @_;
5540
5541         # return List::MoreUtils::any { !exists $project_info->{$_} } @keys;
5542         foreach my $key (@keys) {
5543                 if (!exists $project_info->{$key}) {
5544                         return 1;
5545                 }
5546         }
5547         return;
5548 }
5549
5550 # fills project list info (age, description, owner, category, forks, etc.)
5551 # for each project in the list, removing invalid projects from
5552 # returned list, or fill only specified info.
5553 #
5554 # Invalid projects are removed from the returned list if and only if you
5555 # ask 'age' or 'age_string' to be filled, because they are the only fields
5556 # that run unconditionally git command that requires repository, and
5557 # therefore do always check if project repository is invalid.
5558 #
5559 # USAGE:
5560 # * fill_project_list_info(\@project_list, 'descr_long', 'ctags')
5561 #   ensures that 'descr_long' and 'ctags' fields are filled
5562 # * @project_list = fill_project_list_info(\@project_list)
5563 #   ensures that all fields are filled (and invalid projects removed)
5564 #
5565 # NOTE: modifies $projlist, but does not remove entries from it
5566 sub fill_project_list_info {
5567         my ($projlist, @wanted_keys) = @_;
5568         my @projects;
5569         my $filter_set = sub { return @_; };
5570         if (@wanted_keys) {
5571                 my %wanted_keys = map { $_ => 1 } @wanted_keys;
5572                 $filter_set = sub { return grep { $wanted_keys{$_} } @_; };
5573         }
5574
5575         my $show_ctags = gitweb_check_feature('ctags');
5576  PROJECT:
5577         foreach my $pr (@$projlist) {
5578                 if (project_info_needs_filling($pr, $filter_set->('age', 'age_string'))) {
5579                         my (@activity) = git_get_last_activity($pr->{'path'});
5580                         unless (@activity) {
5581                                 next PROJECT;
5582                         }
5583                         ($pr->{'age'}, $pr->{'age_string'}) = @activity;
5584                 }
5585                 if (project_info_needs_filling($pr, $filter_set->('descr', 'descr_long'))) {
5586                         my $descr = git_get_project_description($pr->{'path'}) || "";
5587                         $descr = to_utf8($descr);
5588                         $pr->{'descr_long'} = $descr;
5589                         $pr->{'descr'} = chop_str($descr, $projects_list_description_width, 5);
5590                 }
5591                 if (project_info_needs_filling($pr, $filter_set->('owner'))) {
5592                         $pr->{'owner'} = git_get_project_owner("$pr->{'path'}") || "";
5593                 }
5594                 if ($show_ctags &&
5595                     project_info_needs_filling($pr, $filter_set->('ctags'))) {
5596                         $pr->{'ctags'} = git_get_project_ctags($pr->{'path'});
5597                 }
5598                 if ($projects_list_group_categories &&
5599                     project_info_needs_filling($pr, $filter_set->('category'))) {
5600                         my $cat = git_get_project_category($pr->{'path'}) ||
5601                                                            $project_list_default_category;
5602                         $pr->{'category'} = to_utf8($cat);
5603                 }
5604
5605                 push @projects, $pr;
5606         }
5607
5608         return @projects;
5609 }
5610
5611 sub sort_projects_list {
5612         my ($projlist, $order) = @_;
5613
5614         sub order_str {
5615                 my $key = shift;
5616                 return sub { $a->{$key} cmp $b->{$key} };
5617         }
5618
5619         sub order_num_then_undef {
5620                 my $key = shift;
5621                 return sub {
5622                         defined $a->{$key} ?
5623                                 (defined $b->{$key} ? $a->{$key} <=> $b->{$key} : -1) :
5624                                 (defined $b->{$key} ? 1 : 0)
5625                 };
5626         }
5627
5628         my %orderings = (
5629                 project => order_str('path'),
5630                 descr => order_str('descr_long'),
5631                 owner => order_str('owner'),
5632                 age => order_num_then_undef('age'),
5633         );
5634
5635         my $ordering = $orderings{$order};
5636         return defined $ordering ? sort $ordering @$projlist : @$projlist;
5637 }
5638
5639 # returns a hash of categories, containing the list of project
5640 # belonging to each category
5641 sub build_projlist_by_category {
5642         my ($projlist, $from, $to) = @_;
5643         my %categories;
5644
5645         $from = 0 unless defined $from;
5646         $to = $#$projlist if (!defined $to || $#$projlist < $to);
5647
5648         for (my $i = $from; $i <= $to; $i++) {
5649                 my $pr = $projlist->[$i];
5650                 push @{$categories{ $pr->{'category'} }}, $pr;
5651         }
5652
5653         return wantarray ? %categories : \%categories;
5654 }
5655
5656 # print 'sort by' <th> element, generating 'sort by $name' replay link
5657 # if that order is not selected
5658 sub print_sort_th {
5659         print format_sort_th(@_);
5660 }
5661
5662 sub format_sort_th {
5663         my ($name, $order, $header) = @_;
5664         my $sort_th = "";
5665         $header ||= ucfirst($name);
5666
5667         if ($order eq $name) {
5668                 $sort_th .= "<th>$header</th>\n";
5669         } else {
5670                 $sort_th .= "<th>" .
5671                             $cgi->a({-href => href(-replay=>1, order=>$name),
5672                                      -class => "header"}, $header) .
5673                             "</th>\n";
5674         }
5675
5676         return $sort_th;
5677 }
5678
5679 sub git_project_list_rows {
5680         my ($projlist, $from, $to, $check_forks) = @_;
5681
5682         $from = 0 unless defined $from;
5683         $to = $#$projlist if (!defined $to || $#$projlist < $to);
5684
5685         my $alternate = 1;
5686         for (my $i = $from; $i <= $to; $i++) {
5687                 my $pr = $projlist->[$i];
5688
5689                 if ($alternate) {
5690                         print "<tr class=\"dark\">\n";
5691                 } else {
5692                         print "<tr class=\"light\">\n";
5693                 }
5694                 $alternate ^= 1;
5695
5696                 if ($check_forks) {
5697                         print "<td>";
5698                         if ($pr->{'forks'}) {
5699                                 my $nforks = scalar @{$pr->{'forks'}};
5700                                 if ($nforks > 0) {
5701                                         print $cgi->a({-href => href(project=>$pr->{'path'}, action=>"forks"),
5702                                                        -title => "$nforks forks"}, "+");
5703                                 } else {
5704                                         print $cgi->span({-title => "$nforks forks"}, "+");
5705                                 }
5706                         }
5707                         print "</td>\n";
5708                 }
5709                 print "<td>" . $cgi->a({-href => href(project=>$pr->{'path'}, action=>"summary"),
5710                                         -class => "list"},
5711                                        esc_html_match_hl($pr->{'path'}, $search_regexp)) .
5712                       "</td>\n" .
5713                       "<td>" . $cgi->a({-href => href(project=>$pr->{'path'}, action=>"summary"),
5714                                         -class => "list",
5715                                         -title => $pr->{'descr_long'}},
5716                                         $search_regexp
5717                                         ? esc_html_match_hl_chopped($pr->{'descr_long'},
5718                                                                     $pr->{'descr'}, $search_regexp)
5719                                         : esc_html($pr->{'descr'})) .
5720                       "</td>\n";
5721                 unless ($omit_owner) {
5722                         print "<td><i>" . chop_and_escape_str($pr->{'owner'}, 15) . "</i></td>\n";
5723                 }
5724                 unless ($omit_age_column) {
5725                         print "<td class=\"". age_class($pr->{'age'}) . "\">" .
5726                             (defined $pr->{'age_string'} ? $pr->{'age_string'} : "No commits") . "</td>\n";
5727                 }
5728                 print"<td class=\"link\">" .
5729                       $cgi->a({-href => href(project=>$pr->{'path'}, action=>"summary")}, "summary")   . " | " .
5730                       $cgi->a({-href => href(project=>$pr->{'path'}, action=>"shortlog")}, "shortlog") . " | " .
5731                       $cgi->a({-href => href(project=>$pr->{'path'}, action=>"log")}, "log") . " | " .
5732                       $cgi->a({-href => href(project=>$pr->{'path'}, action=>"tree")}, "tree") .
5733                       ($pr->{'forks'} ? " | " . $cgi->a({-href => href(project=>$pr->{'path'}, action=>"forks")}, "forks") : '') .
5734                       "</td>\n" .
5735                       "</tr>\n";
5736         }
5737 }
5738
5739 sub git_project_list_body {
5740         # actually uses global variable $project
5741         my ($projlist, $order, $from, $to, $extra, $no_header) = @_;
5742         my @projects = @$projlist;
5743
5744         my $check_forks = gitweb_check_feature('forks');
5745         my $show_ctags  = gitweb_check_feature('ctags');
5746         my $tagfilter = $show_ctags ? $input_params{'ctag'} : undef;
5747         $check_forks = undef
5748                 if ($tagfilter || $search_regexp);
5749
5750         # filtering out forks before filling info allows to do less work
5751         @projects = filter_forks_from_projects_list(\@projects)
5752                 if ($check_forks);
5753         # search_projects_list pre-fills required info
5754         @projects = search_projects_list(\@projects,
5755                                          'search_regexp' => $search_regexp,
5756                                          'tagfilter'  => $tagfilter)
5757                 if ($tagfilter || $search_regexp);
5758         # fill the rest
5759         my @all_fields = ('descr', 'descr_long', 'ctags', 'category');
5760         push @all_fields, ('age', 'age_string') unless($omit_age_column);
5761         push @all_fields, 'owner' unless($omit_owner);
5762         @projects = fill_project_list_info(\@projects, @all_fields);
5763
5764         $order ||= $default_projects_order;
5765         $from = 0 unless defined $from;
5766         $to = $#projects if (!defined $to || $#projects < $to);
5767
5768         # short circuit
5769         if ($from > $to) {
5770                 print "<center>\n".
5771                       "<b>No such projects found</b><br />\n".
5772                       "Click ".$cgi->a({-href=>href(project=>undef)},"here")." to view all projects<br />\n".
5773                       "</center>\n<br />\n";
5774                 return;
5775         }
5776
5777         @projects = sort_projects_list(\@projects, $order);
5778
5779         if ($show_ctags) {
5780                 my $ctags = git_gather_all_ctags(\@projects);
5781                 my $cloud = git_populate_project_tagcloud($ctags);
5782                 print git_show_project_tagcloud($cloud, 64);
5783         }
5784
5785         print "<table class=\"project_list\">\n";
5786         unless ($no_header) {
5787                 print "<tr>\n";
5788                 if ($check_forks) {
5789                         print "<th></th>\n";
5790                 }
5791                 print_sort_th('project', $order, 'Project');
5792                 print_sort_th('descr', $order, 'Description');
5793                 print_sort_th('owner', $order, 'Owner') unless $omit_owner;
5794                 print_sort_th('age', $order, 'Last Change') unless $omit_age_column;
5795                 print "<th></th>\n" . # for links
5796                       "</tr>\n";
5797         }
5798
5799         if ($projects_list_group_categories) {
5800                 # only display categories with projects in the $from-$to window
5801                 @projects = sort {$a->{'category'} cmp $b->{'category'}} @projects[$from..$to];
5802                 my %categories = build_projlist_by_category(\@projects, $from, $to);
5803                 foreach my $cat (sort keys %categories) {
5804                         unless ($cat eq "") {
5805                                 print "<tr>\n";
5806                                 if ($check_forks) {
5807                                         print "<td></td>\n";
5808                                 }
5809                                 print "<td class=\"category\" colspan=\"5\">".esc_html($cat)."</td>\n";
5810                                 print "</tr>\n";
5811                         }
5812
5813                         git_project_list_rows($categories{$cat}, undef, undef, $check_forks);
5814                 }
5815         } else {
5816                 git_project_list_rows(\@projects, $from, $to, $check_forks);
5817         }
5818
5819         if (defined $extra) {
5820                 print "<tr>\n";
5821                 if ($check_forks) {
5822                         print "<td></td>\n";
5823                 }
5824                 print "<td colspan=\"5\">$extra</td>\n" .
5825                       "</tr>\n";
5826         }
5827         print "</table>\n";
5828 }
5829
5830 sub git_log_body {
5831         # uses global variable $project
5832         my ($commitlist, $from, $to, $refs, $extra) = @_;
5833
5834         $from = 0 unless defined $from;
5835         $to = $#{$commitlist} if (!defined $to || $#{$commitlist} < $to);
5836
5837         for (my $i = 0; $i <= $to; $i++) {
5838                 my %co = %{$commitlist->[$i]};
5839                 next if !%co;
5840                 my $commit = $co{'id'};
5841                 my $ref = format_ref_marker($refs, $commit);
5842                 git_print_header_div('commit',
5843                                "<span class=\"age\">$co{'age_string'}</span>" .
5844                                esc_html($co{'title'}) . $ref,
5845                                $commit);
5846                 print "<div class=\"title_text\">\n" .
5847                       "<div class=\"log_link\">\n" .
5848                       $cgi->a({-href => href(action=>"commit", hash=>$commit)}, "commit") .
5849                       " | " .
5850                       $cgi->a({-href => href(action=>"commitdiff", hash=>$commit)}, "commitdiff") .
5851                       " | " .
5852                       $cgi->a({-href => href(action=>"tree", hash=>$commit, hash_base=>$commit)}, "tree") .
5853                       "<br/>\n" .
5854                       "</div>\n";
5855                       git_print_authorship(\%co, -tag => 'span');
5856                       print "<br/>\n</div>\n";
5857
5858                 print "<div class=\"log_body\">\n";
5859                 git_print_log($co{'comment'}, -final_empty_line=> 1);
5860                 print "</div>\n";
5861         }
5862         if ($extra) {
5863                 print "<div class=\"page_nav\">\n";
5864                 print "$extra\n";
5865                 print "</div>\n";
5866         }
5867 }
5868
5869 sub git_shortlog_body {
5870         # uses global variable $project
5871         my ($commitlist, $from, $to, $refs, $extra) = @_;
5872
5873         $from = 0 unless defined $from;
5874         $to = $#{$commitlist} if (!defined $to || $#{$commitlist} < $to);
5875
5876         print "<table class=\"shortlog\">\n";
5877         my $alternate = 1;
5878         for (my $i = $from; $i <= $to; $i++) {
5879                 my %co = %{$commitlist->[$i]};
5880                 my $commit = $co{'id'};
5881                 my $ref = format_ref_marker($refs, $commit);
5882                 if ($alternate) {
5883                         print "<tr class=\"dark\">\n";
5884                 } else {
5885                         print "<tr class=\"light\">\n";
5886                 }
5887                 $alternate ^= 1;
5888                 # git_summary() used print "<td><i>$co{'age_string'}</i></td>\n" .
5889                 print "<td title=\"$co{'age_string_age'}\"><i>$co{'age_string_date'}</i></td>\n" .
5890                       format_author_html('td', \%co, 10) . "<td>";
5891                 print format_subject_html($co{'title'}, $co{'title_short'},
5892                                           href(action=>"commit", hash=>$commit), $ref);
5893                 print "</td>\n" .
5894                       "<td class=\"link\">" .
5895                       $cgi->a({-href => href(action=>"commit", hash=>$commit)}, "commit") . " | " .
5896                       $cgi->a({-href => href(action=>"commitdiff", hash=>$commit)}, "commitdiff") . " | " .
5897                       $cgi->a({-href => href(action=>"tree", hash=>$commit, hash_base=>$commit)}, "tree");
5898                 my $snapshot_links = format_snapshot_links($commit);
5899                 if (defined $snapshot_links) {
5900                         print " | " . $snapshot_links;
5901                 }
5902                 print "</td>\n" .
5903                       "</tr>\n";
5904         }
5905         if (defined $extra) {
5906                 print "<tr>\n" .
5907                       "<td colspan=\"4\">$extra</td>\n" .
5908                       "</tr>\n";
5909         }
5910         print "</table>\n";
5911 }
5912
5913 sub git_history_body {
5914         # Warning: assumes constant type (blob or tree) during history
5915         my ($commitlist, $from, $to, $refs, $extra,
5916             $file_name, $file_hash, $ftype) = @_;
5917
5918         $from = 0 unless defined $from;
5919         $to = $#{$commitlist} unless (defined $to && $to <= $#{$commitlist});
5920
5921         print "<table class=\"history\">\n";
5922         my $alternate = 1;
5923         for (my $i = $from; $i <= $to; $i++) {
5924                 my %co = %{$commitlist->[$i]};
5925                 if (!%co) {
5926                         next;
5927                 }
5928                 my $commit = $co{'id'};
5929
5930                 my $ref = format_ref_marker($refs, $commit);
5931
5932                 if ($alternate) {
5933                         print "<tr class=\"dark\">\n";
5934                 } else {
5935                         print "<tr class=\"light\">\n";
5936                 }
5937                 $alternate ^= 1;
5938                 print "<td title=\"$co{'age_string_age'}\"><i>$co{'age_string_date'}</i></td>\n" .
5939         # shortlog:   format_author_html('td', \%co, 10)
5940                       format_author_html('td', \%co, 15, 3) . "<td>";
5941                 # originally git_history used chop_str($co{'title'}, 50)
5942                 print format_subject_html($co{'title'}, $co{'title_short'},
5943                                           href(action=>"commit", hash=>$commit), $ref);
5944                 print "</td>\n" .
5945                       "<td class=\"link\">" .
5946                       $cgi->a({-href => href(action=>$ftype, hash_base=>$commit, file_name=>$file_name)}, $ftype) . " | " .
5947                       $cgi->a({-href => href(action=>"commitdiff", hash=>$commit)}, "commitdiff");
5948
5949                 if ($ftype eq 'blob') {
5950                         my $blob_current = $file_hash;
5951                         my $blob_parent  = git_get_hash_by_path($commit, $file_name);
5952                         if (defined $blob_current && defined $blob_parent &&
5953                                         $blob_current ne $blob_parent) {
5954                                 print " | " .
5955                                         $cgi->a({-href => href(action=>"blobdiff",
5956                                                                hash=>$blob_current, hash_parent=>$blob_parent,
5957                                                                hash_base=>$hash_base, hash_parent_base=>$commit,
5958                                                                file_name=>$file_name)},
5959                                                 "diff to current");
5960                         }
5961                 }
5962                 print "</td>\n" .
5963                       "</tr>\n";
5964         }
5965         if (defined $extra) {
5966                 print "<tr>\n" .
5967                       "<td colspan=\"4\">$extra</td>\n" .
5968                       "</tr>\n";
5969         }
5970         print "</table>\n";
5971 }
5972
5973 sub git_tags_body {
5974         # uses global variable $project
5975         my ($taglist, $from, $to, $extra) = @_;
5976         $from = 0 unless defined $from;
5977         $to = $#{$taglist} if (!defined $to || $#{$taglist} < $to);
5978
5979         print "<table class=\"tags\">\n";
5980         my $alternate = 1;
5981         for (my $i = $from; $i <= $to; $i++) {
5982                 my $entry = $taglist->[$i];
5983                 my %tag = %$entry;
5984                 my $comment = $tag{'subject'};
5985                 my $comment_short;
5986                 if (defined $comment) {
5987                         $comment_short = chop_str($comment, 30, 5);
5988                 }
5989                 if ($alternate) {
5990                         print "<tr class=\"dark\">\n";
5991                 } else {
5992                         print "<tr class=\"light\">\n";
5993                 }
5994                 $alternate ^= 1;
5995                 if (defined $tag{'age'}) {
5996                         print "<td><i>$tag{'age'}</i></td>\n";
5997                 } else {
5998                         print "<td></td>\n";
5999                 }
6000                 print "<td>" .
6001                       $cgi->a({-href => href(action=>$tag{'reftype'}, hash=>$tag{'refid'}),
6002                                -class => "list name"}, esc_html($tag{'name'})) .
6003                       "</td>\n" .
6004                       "<td>";
6005                 if (defined $comment) {
6006                         print format_subject_html($comment, $comment_short,
6007                                                   href(action=>"tag", hash=>$tag{'id'}));
6008                 }
6009                 print "</td>\n" .
6010                       "<td class=\"selflink\">";
6011                 if ($tag{'type'} eq "tag") {
6012                         print $cgi->a({-href => href(action=>"tag", hash=>$tag{'id'})}, "tag");
6013                 } else {
6014                         print "&nbsp;";
6015                 }
6016                 print "</td>\n" .
6017                       "<td class=\"link\">" . " | " .
6018                       $cgi->a({-href => href(action=>$tag{'reftype'}, hash=>$tag{'refid'})}, $tag{'reftype'});
6019                 if ($tag{'reftype'} eq "commit") {
6020                         print " | " . $cgi->a({-href => href(action=>"shortlog", hash=>$tag{'fullname'})}, "shortlog") .
6021                               " | " . $cgi->a({-href => href(action=>"log", hash=>$tag{'fullname'})}, "log");
6022                 } elsif ($tag{'reftype'} eq "blob") {
6023                         print " | " . $cgi->a({-href => href(action=>"blob_plain", hash=>$tag{'refid'})}, "raw");
6024                 }
6025                 print "</td>\n" .
6026                       "</tr>";
6027         }
6028         if (defined $extra) {
6029                 print "<tr>\n" .
6030                       "<td colspan=\"5\">$extra</td>\n" .
6031                       "</tr>\n";
6032         }
6033         print "</table>\n";
6034 }
6035
6036 sub git_heads_body {
6037         # uses global variable $project
6038         my ($headlist, $head_at, $from, $to, $extra) = @_;
6039         $from = 0 unless defined $from;
6040         $to = $#{$headlist} if (!defined $to || $#{$headlist} < $to);
6041
6042         print "<table class=\"heads\">\n";
6043         my $alternate = 1;
6044         for (my $i = $from; $i <= $to; $i++) {
6045                 my $entry = $headlist->[$i];
6046                 my %ref = %$entry;
6047                 my $curr = defined $head_at && $ref{'id'} eq $head_at;
6048                 if ($alternate) {
6049                         print "<tr class=\"dark\">\n";
6050                 } else {
6051                         print "<tr class=\"light\">\n";
6052                 }
6053                 $alternate ^= 1;
6054                 print "<td><i>$ref{'age'}</i></td>\n" .
6055                       ($curr ? "<td class=\"current_head\">" : "<td>") .
6056                       $cgi->a({-href => href(action=>"shortlog", hash=>$ref{'fullname'}),
6057                                -class => "list name"},esc_html($ref{'name'})) .
6058                       "</td>\n" .
6059                       "<td class=\"link\">" .
6060                       $cgi->a({-href => href(action=>"shortlog", hash=>$ref{'fullname'})}, "shortlog") . " | " .
6061                       $cgi->a({-href => href(action=>"log", hash=>$ref{'fullname'})}, "log") . " | " .
6062                       $cgi->a({-href => href(action=>"tree", hash=>$ref{'fullname'}, hash_base=>$ref{'fullname'})}, "tree") .
6063                       "</td>\n" .
6064                       "</tr>";
6065         }
6066         if (defined $extra) {
6067                 print "<tr>\n" .
6068                       "<td colspan=\"3\">$extra</td>\n" .
6069                       "</tr>\n";
6070         }
6071         print "</table>\n";
6072 }
6073
6074 # Display a single remote block
6075 sub git_remote_block {
6076         my ($remote, $rdata, $limit, $head) = @_;
6077
6078         my $heads = $rdata->{'heads'};
6079         my $fetch = $rdata->{'fetch'};
6080         my $push = $rdata->{'push'};
6081
6082         my $urls_table = "<table class=\"projects_list\">\n" ;
6083
6084         if (defined $fetch) {
6085                 if ($fetch eq $push) {
6086                         $urls_table .= format_repo_url("URL", $fetch);
6087                 } else {
6088                         $urls_table .= format_repo_url("Fetch URL", $fetch);
6089                         $urls_table .= format_repo_url("Push URL", $push) if defined $push;
6090                 }
6091         } elsif (defined $push) {
6092                 $urls_table .= format_repo_url("Push URL", $push);
6093         } else {
6094                 $urls_table .= format_repo_url("", "No remote URL");
6095         }
6096
6097         $urls_table .= "</table>\n";
6098
6099         my $dots;
6100         if (defined $limit && $limit < @$heads) {
6101                 $dots = $cgi->a({-href => href(action=>"remotes", hash=>$remote)}, "...");
6102         }
6103
6104         print $urls_table;
6105         git_heads_body($heads, $head, 0, $limit, $dots);
6106 }
6107
6108 # Display a list of remote names with the respective fetch and push URLs
6109 sub git_remotes_list {
6110         my ($remotedata, $limit) = @_;
6111         print "<table class=\"heads\">\n";
6112         my $alternate = 1;
6113         my @remotes = sort keys %$remotedata;
6114
6115         my $limited = $limit && $limit < @remotes;
6116
6117         $#remotes = $limit - 1 if $limited;
6118
6119         while (my $remote = shift @remotes) {
6120                 my $rdata = $remotedata->{$remote};
6121                 my $fetch = $rdata->{'fetch'};
6122                 my $push = $rdata->{'push'};
6123                 if ($alternate) {
6124                         print "<tr class=\"dark\">\n";
6125                 } else {
6126                         print "<tr class=\"light\">\n";
6127                 }
6128                 $alternate ^= 1;
6129                 print "<td>" .
6130                       $cgi->a({-href=> href(action=>'remotes', hash=>$remote),
6131                                -class=> "list name"},esc_html($remote)) .
6132                       "</td>";
6133                 print "<td class=\"link\">" .
6134                       (defined $fetch ? $cgi->a({-href=> $fetch}, "fetch") : "fetch") .
6135                       " | " .
6136                       (defined $push ? $cgi->a({-href=> $push}, "push") : "push") .
6137                       "</td>";
6138
6139                 print "</tr>\n";
6140         }
6141
6142         if ($limited) {
6143                 print "<tr>\n" .
6144                       "<td colspan=\"3\">" .
6145                       $cgi->a({-href => href(action=>"remotes")}, "...") .
6146                       "</td>\n" . "</tr>\n";
6147         }
6148
6149         print "</table>";
6150 }
6151
6152 # Display remote heads grouped by remote, unless there are too many
6153 # remotes, in which case we only display the remote names
6154 sub git_remotes_body {
6155         my ($remotedata, $limit, $head) = @_;
6156         if ($limit and $limit < keys %$remotedata) {
6157                 git_remotes_list($remotedata, $limit);
6158         } else {
6159                 fill_remote_heads($remotedata);
6160                 while (my ($remote, $rdata) = each %$remotedata) {
6161                         git_print_section({-class=>"remote", -id=>$remote},
6162                                 ["remotes", $remote, $remote], sub {
6163                                         git_remote_block($remote, $rdata, $limit, $head);
6164                                 });
6165                 }
6166         }
6167 }
6168
6169 sub git_search_message {
6170         my %co = @_;
6171
6172         my $greptype;
6173         if ($searchtype eq 'commit') {
6174                 $greptype = "--grep=";
6175         } elsif ($searchtype eq 'author') {
6176                 $greptype = "--author=";
6177         } elsif ($searchtype eq 'committer') {
6178                 $greptype = "--committer=";
6179         }
6180         $greptype .= $searchtext;
6181         my @commitlist = parse_commits($hash, 101, (100 * $page), undef,
6182                                        $greptype, '--regexp-ignore-case',
6183                                        $search_use_regexp ? '--extended-regexp' : '--fixed-strings');
6184
6185         my $paging_nav = '';
6186         if ($page > 0) {
6187                 $paging_nav .=
6188                         $cgi->a({-href => href(-replay=>1, page=>undef)},
6189                                 "first") .
6190                         " &sdot; " .
6191                         $cgi->a({-href => href(-replay=>1, page=>$page-1),
6192                                  -accesskey => "p", -title => "Alt-p"}, "prev");
6193         } else {
6194                 $paging_nav .= "first &sdot; prev";
6195         }
6196         my $next_link = '';
6197         if ($#commitlist >= 100) {
6198                 $next_link =
6199                         $cgi->a({-href => href(-replay=>1, page=>$page+1),
6200                                  -accesskey => "n", -title => "Alt-n"}, "next");
6201                 $paging_nav .= " &sdot; $next_link";
6202         } else {
6203                 $paging_nav .= " &sdot; next";
6204         }
6205
6206         git_header_html();
6207
6208         git_print_page_nav('','', $hash,$co{'tree'},$hash, $paging_nav);
6209         git_print_header_div('commit', esc_html($co{'title'}), $hash);
6210         if ($page == 0 && !@commitlist) {
6211                 print "<p>No match.</p>\n";
6212         } else {
6213                 git_search_grep_body(\@commitlist, 0, 99, $next_link);
6214         }
6215
6216         git_footer_html();
6217 }
6218
6219 sub git_search_changes {
6220         my %co = @_;
6221
6222         local $/ = "\n";
6223         open my $fd, '-|', git_cmd(), '--no-pager', 'log', @diff_opts,
6224                 '--pretty=format:%H', '--no-abbrev', '--raw', "-S$searchtext",
6225                 ($search_use_regexp ? '--pickaxe-regex' : ())
6226                         or die_error(500, "Open git-log failed");
6227
6228         git_header_html();
6229
6230         git_print_page_nav('','', $hash,$co{'tree'},$hash);
6231         git_print_header_div('commit', esc_html($co{'title'}), $hash);
6232
6233         print "<table class=\"pickaxe search\">\n";
6234         my $alternate = 1;
6235         undef %co;
6236         my @files;
6237         while (my $line = <$fd>) {
6238                 chomp $line;
6239                 next unless $line;
6240
6241                 my %set = parse_difftree_raw_line($line);
6242                 if (defined $set{'commit'}) {
6243                         # finish previous commit
6244                         if (%co) {
6245                                 print "</td>\n" .
6246                                       "<td class=\"link\">" .
6247                                       $cgi->a({-href => href(action=>"commit", hash=>$co{'id'})},
6248                                               "commit") .
6249                                       " | " .
6250                                       $cgi->a({-href => href(action=>"tree", hash=>$co{'tree'},
6251                                                              hash_base=>$co{'id'})},
6252                                               "tree") .
6253                                       "</td>\n" .
6254                                       "</tr>\n";
6255                         }
6256
6257                         if ($alternate) {
6258                                 print "<tr class=\"dark\">\n";
6259                         } else {
6260                                 print "<tr class=\"light\">\n";
6261                         }
6262                         $alternate ^= 1;
6263                         %co = parse_commit($set{'commit'});
6264                         my $author = chop_and_escape_str($co{'author_name'}, 15, 5);
6265                         print "<td title=\"$co{'age_string_age'}\"><i>$co{'age_string_date'}</i></td>\n" .
6266                               "<td><i>$author</i></td>\n" .
6267                               "<td>" .
6268                               $cgi->a({-href => href(action=>"commit", hash=>$co{'id'}),
6269                                       -class => "list subject"},
6270                                       chop_and_escape_str($co{'title'}, 50) . "<br/>");
6271                 } elsif (defined $set{'to_id'}) {
6272                         next if ($set{'to_id'} =~ m/^0{40}$/);
6273
6274                         print $cgi->a({-href => href(action=>"blob", hash_base=>$co{'id'},
6275                                                      hash=>$set{'to_id'}, file_name=>$set{'to_file'}),
6276                                       -class => "list"},
6277                                       "<span class=\"match\">" . esc_path($set{'file'}) . "</span>") .
6278                               "<br/>\n";
6279                 }
6280         }
6281         close $fd;
6282
6283         # finish last commit (warning: repetition!)
6284         if (%co) {
6285                 print "</td>\n" .
6286                       "<td class=\"link\">" .
6287                       $cgi->a({-href => href(action=>"commit", hash=>$co{'id'})},
6288                               "commit") .
6289                       " | " .
6290                       $cgi->a({-href => href(action=>"tree", hash=>$co{'tree'},
6291                                              hash_base=>$co{'id'})},
6292                               "tree") .
6293                       "</td>\n" .
6294                       "</tr>\n";
6295         }
6296
6297         print "</table>\n";
6298
6299         git_footer_html();
6300 }
6301
6302 sub git_search_files {
6303         my %co = @_;
6304
6305         local $/ = "\n";
6306         open my $fd, "-|", git_cmd(), 'grep', '-n', '-z',
6307                 $search_use_regexp ? ('-E', '-i') : '-F',
6308                 $searchtext, $co{'tree'}
6309                         or die_error(500, "Open git-grep failed");
6310
6311         git_header_html();
6312
6313         git_print_page_nav('','', $hash,$co{'tree'},$hash);
6314         git_print_header_div('commit', esc_html($co{'title'}), $hash);
6315
6316         print "<table class=\"grep_search\">\n";
6317         my $alternate = 1;
6318         my $matches = 0;
6319         my $lastfile = '';
6320         my $file_href;
6321         while (my $line = <$fd>) {
6322                 chomp $line;
6323                 my ($file, $lno, $ltext, $binary);
6324                 last if ($matches++ > 1000);
6325                 if ($line =~ /^Binary file (.+) matches$/) {
6326                         $file = $1;
6327                         $binary = 1;
6328                 } else {
6329                         ($file, $lno, $ltext) = split(/\0/, $line, 3);
6330                         $file =~ s/^$co{'tree'}://;
6331                 }
6332                 if ($file ne $lastfile) {
6333                         $lastfile and print "</td></tr>\n";
6334                         if ($alternate++) {
6335                                 print "<tr class=\"dark\">\n";
6336                         } else {
6337                                 print "<tr class=\"light\">\n";
6338                         }
6339                         $file_href = href(action=>"blob", hash_base=>$co{'id'},
6340                                           file_name=>$file);
6341                         print "<td class=\"list\">".
6342                                 $cgi->a({-href => $file_href, -class => "list"}, esc_path($file));
6343                         print "</td><td>\n";
6344                         $lastfile = $file;
6345                 }
6346                 if ($binary) {
6347                         print "<div class=\"binary\">Binary file</div>\n";
6348                 } else {
6349                         $ltext = untabify($ltext);
6350                         if ($ltext =~ m/^(.*)($search_regexp)(.*)$/i) {
6351                                 $ltext = esc_html($1, -nbsp=>1);
6352                                 $ltext .= '<span class="match">';
6353                                 $ltext .= esc_html($2, -nbsp=>1);
6354                                 $ltext .= '</span>';
6355                                 $ltext .= esc_html($3, -nbsp=>1);
6356                         } else {
6357                                 $ltext = esc_html($ltext, -nbsp=>1);
6358                         }
6359                         print "<div class=\"pre\">" .
6360                                 $cgi->a({-href => $file_href.'#l'.$lno,
6361                                         -class => "linenr"}, sprintf('%4i', $lno)) .
6362                                 ' ' .  $ltext . "</div>\n";
6363                 }
6364         }
6365         if ($lastfile) {
6366                 print "</td></tr>\n";
6367                 if ($matches > 1000) {
6368                         print "<div class=\"diff nodifferences\">Too many matches, listing trimmed</div>\n";
6369                 }
6370         } else {
6371                 print "<div class=\"diff nodifferences\">No matches found</div>\n";
6372         }
6373         close $fd;
6374
6375         print "</table>\n";
6376
6377         git_footer_html();
6378 }
6379
6380 sub git_search_grep_body {
6381         my ($commitlist, $from, $to, $extra) = @_;
6382         $from = 0 unless defined $from;
6383         $to = $#{$commitlist} if (!defined $to || $#{$commitlist} < $to);
6384
6385         print "<table class=\"commit_search\">\n";
6386         my $alternate = 1;
6387         for (my $i = $from; $i <= $to; $i++) {
6388                 my %co = %{$commitlist->[$i]};
6389                 if (!%co) {
6390                         next;
6391                 }
6392                 my $commit = $co{'id'};
6393                 if ($alternate) {
6394                         print "<tr class=\"dark\">\n";
6395                 } else {
6396                         print "<tr class=\"light\">\n";
6397                 }
6398                 $alternate ^= 1;
6399                 print "<td title=\"$co{'age_string_age'}\"><i>$co{'age_string_date'}</i></td>\n" .
6400                       format_author_html('td', \%co, 15, 5) .
6401                       "<td>" .
6402                       $cgi->a({-href => href(action=>"commit", hash=>$co{'id'}),
6403                                -class => "list subject"},
6404                               chop_and_escape_str($co{'title'}, 50) . "<br/>");
6405                 my $comment = $co{'comment'};
6406                 foreach my $line (@$comment) {
6407                         if ($line =~ m/^(.*?)($search_regexp)(.*)$/i) {
6408                                 my ($lead, $match, $trail) = ($1, $2, $3);
6409                                 $match = chop_str($match, 70, 5, 'center');
6410                                 my $contextlen = int((80 - length($match))/2);
6411                                 $contextlen = 30 if ($contextlen > 30);
6412                                 $lead  = chop_str($lead,  $contextlen, 10, 'left');
6413                                 $trail = chop_str($trail, $contextlen, 10, 'right');
6414
6415                                 $lead  = esc_html($lead);
6416                                 $match = esc_html($match);
6417                                 $trail = esc_html($trail);
6418
6419                                 print "$lead<span class=\"match\">$match</span>$trail<br />";
6420                         }
6421                 }
6422                 print "</td>\n" .
6423                       "<td class=\"link\">" .
6424                       $cgi->a({-href => href(action=>"commit", hash=>$co{'id'})}, "commit") .
6425                       " | " .
6426                       $cgi->a({-href => href(action=>"commitdiff", hash=>$co{'id'})}, "commitdiff") .
6427                       " | " .
6428                       $cgi->a({-href => href(action=>"tree", hash=>$co{'tree'}, hash_base=>$co{'id'})}, "tree");
6429                 print "</td>\n" .
6430                       "</tr>\n";
6431         }
6432         if (defined $extra) {
6433                 print "<tr>\n" .
6434                       "<td colspan=\"3\">$extra</td>\n" .
6435                       "</tr>\n";
6436         }
6437         print "</table>\n";
6438 }
6439
6440 ## ======================================================================
6441 ## ======================================================================
6442 ## actions
6443
6444 sub git_project_list {
6445         my $order = $input_params{'order'};
6446         if (defined $order && $order !~ m/none|project|descr|owner|age/) {
6447                 die_error(400, "Unknown order parameter");
6448         }
6449
6450         my @list = git_get_projects_list($project_filter, $strict_export);
6451         if (!@list) {
6452                 die_error(404, "No projects found");
6453         }
6454
6455         git_header_html();
6456         if (defined $home_text && -f $home_text) {
6457                 print "<div class=\"index_include\">\n";
6458                 insert_file($home_text);
6459                 print "</div>\n";
6460         }
6461
6462         git_project_search_form($searchtext, $search_use_regexp);
6463         git_project_list_body(\@list, $order);
6464         git_footer_html();
6465 }
6466
6467 sub git_forks {
6468         my $order = $input_params{'order'};
6469         if (defined $order && $order !~ m/none|project|descr|owner|age/) {
6470                 die_error(400, "Unknown order parameter");
6471         }
6472
6473         my $filter = $project;
6474         $filter =~ s/\.git$//;
6475         my @list = git_get_projects_list($filter);
6476         if (!@list) {
6477                 die_error(404, "No forks found");
6478         }
6479
6480         git_header_html();
6481         git_print_page_nav('','');
6482         git_print_header_div('summary', "$project forks");
6483         git_project_list_body(\@list, $order);
6484         git_footer_html();
6485 }
6486
6487 sub git_project_index {
6488         my @projects = git_get_projects_list($project_filter, $strict_export);
6489         if (!@projects) {
6490                 die_error(404, "No projects found");
6491         }
6492
6493         print $cgi->header(
6494                 -type => 'text/plain',
6495                 -charset => 'utf-8',
6496                 -content_disposition => 'inline; filename="index.aux"');
6497
6498         foreach my $pr (@projects) {
6499                 if (!exists $pr->{'owner'}) {
6500                         $pr->{'owner'} = git_get_project_owner("$pr->{'path'}");
6501                 }
6502
6503                 my ($path, $owner) = ($pr->{'path'}, $pr->{'owner'});
6504                 # quote as in CGI::Util::encode, but keep the slash, and use '+' for ' '
6505                 $path  =~ s/([^a-zA-Z0-9_.\-\/ ])/sprintf("%%%02X", ord($1))/eg;
6506                 $owner =~ s/([^a-zA-Z0-9_.\-\/ ])/sprintf("%%%02X", ord($1))/eg;
6507                 $path  =~ s/ /\+/g;
6508                 $owner =~ s/ /\+/g;
6509
6510                 print "$path $owner\n";
6511         }
6512 }
6513
6514 sub git_summary {
6515         my $descr = git_get_project_description($project) || "none";
6516         my %co = parse_commit("HEAD");
6517         my %cd = %co ? parse_date($co{'committer_epoch'}, $co{'committer_tz'}) : ();
6518         my $head = $co{'id'};
6519         my $remote_heads = gitweb_check_feature('remote_heads');
6520
6521         my $owner = git_get_project_owner($project);
6522
6523         my $refs = git_get_references();
6524         # These get_*_list functions return one more to allow us to see if
6525         # there are more ...
6526         my @taglist  = git_get_tags_list(16);
6527         my @headlist = git_get_heads_list(16);
6528         my %remotedata = $remote_heads ? git_get_remotes_list() : ();
6529         my @forklist;
6530         my $check_forks = gitweb_check_feature('forks');
6531
6532         if ($check_forks) {
6533                 # find forks of a project
6534                 my $filter = $project;
6535                 $filter =~ s/\.git$//;
6536                 @forklist = git_get_projects_list($filter);
6537                 # filter out forks of forks
6538                 @forklist = filter_forks_from_projects_list(\@forklist)
6539                         if (@forklist);
6540         }
6541
6542         git_header_html();
6543         git_print_page_nav('summary','', $head);
6544
6545         print "<div class=\"title\">&nbsp;</div>\n";
6546         print "<table class=\"projects_list\">\n" .
6547               "<tr id=\"metadata_desc\"><td>description</td><td>" . esc_html($descr) . "</td></tr>\n";
6548         if ($owner and not $omit_owner) {
6549                 print  "<tr id=\"metadata_owner\"><td>owner</td><td>" . esc_html($owner) . "</td></tr>\n";
6550         }
6551         if (defined $cd{'rfc2822'}) {
6552                 print "<tr id=\"metadata_lchange\"><td>last change</td>" .
6553                       "<td>".format_timestamp_html(\%cd)."</td></tr>\n";
6554         }
6555
6556         # use per project git URL list in $projectroot/$project/cloneurl
6557         # or make project git URL from git base URL and project name
6558         my $url_tag = "URL";
6559         my @url_list = git_get_project_url_list($project);
6560         @url_list = map { "$_/$project" } @git_base_url_list unless @url_list;
6561         foreach my $git_url (@url_list) {
6562                 next unless $git_url;
6563                 print format_repo_url($url_tag, $git_url);
6564                 $url_tag = "";
6565         }
6566
6567         # Tag cloud
6568         my $show_ctags = gitweb_check_feature('ctags');
6569         if ($show_ctags) {
6570                 my $ctags = git_get_project_ctags($project);
6571                 if (%$ctags) {
6572                         # without ability to add tags, don't show if there are none
6573                         my $cloud = git_populate_project_tagcloud($ctags);
6574                         print "<tr id=\"metadata_ctags\">" .
6575                               "<td>content tags</td>" .
6576                               "<td>".git_show_project_tagcloud($cloud, 48)."</td>" .
6577                               "</tr>\n";
6578                 }
6579         }
6580
6581         print "</table>\n";
6582
6583         # If XSS prevention is on, we don't include README.html.
6584         # TODO: Allow a readme in some safe format.
6585         if (!$prevent_xss && -s "$projectroot/$project/README.html") {
6586                 print "<div class=\"title\">readme</div>\n" .
6587                       "<div class=\"readme\">\n";
6588                 insert_file("$projectroot/$project/README.html");
6589                 print "\n</div>\n"; # class="readme"
6590         }
6591
6592         # we need to request one more than 16 (0..15) to check if
6593         # those 16 are all
6594         my @commitlist = $head ? parse_commits($head, 17) : ();
6595         if (@commitlist) {
6596                 git_print_header_div('shortlog');
6597                 git_shortlog_body(\@commitlist, 0, 15, $refs,
6598                                   $#commitlist <=  15 ? undef :
6599                                   $cgi->a({-href => href(action=>"shortlog")}, "..."));
6600         }
6601
6602         if (@taglist) {
6603                 git_print_header_div('tags');
6604                 git_tags_body(\@taglist, 0, 15,
6605                               $#taglist <=  15 ? undef :
6606                               $cgi->a({-href => href(action=>"tags")}, "..."));
6607         }
6608
6609         if (@headlist) {
6610                 git_print_header_div('heads');
6611                 git_heads_body(\@headlist, $head, 0, 15,
6612                                $#headlist <= 15 ? undef :
6613                                $cgi->a({-href => href(action=>"heads")}, "..."));
6614         }
6615
6616         if (%remotedata) {
6617                 git_print_header_div('remotes');
6618                 git_remotes_body(\%remotedata, 15, $head);
6619         }
6620
6621         if (@forklist) {
6622                 git_print_header_div('forks');
6623                 git_project_list_body(\@forklist, 'age', 0, 15,
6624                                       $#forklist <= 15 ? undef :
6625                                       $cgi->a({-href => href(action=>"forks")}, "..."),
6626                                       'no_header');
6627         }
6628
6629         git_footer_html();
6630 }
6631
6632 sub git_tag {
6633         my %tag = parse_tag($hash);
6634
6635         if (! %tag) {
6636                 die_error(404, "Unknown tag object");
6637         }
6638
6639         my $head = git_get_head_hash($project);
6640         git_header_html();
6641         git_print_page_nav('','', $head,undef,$head);
6642         git_print_header_div('commit', esc_html($tag{'name'}), $hash);
6643         print "<div class=\"title_text\">\n" .
6644               "<table class=\"object_header\">\n" .
6645               "<tr>\n" .
6646               "<td>object</td>\n" .
6647               "<td>" . $cgi->a({-class => "list", -href => href(action=>$tag{'type'}, hash=>$tag{'object'})},
6648                                $tag{'object'}) . "</td>\n" .
6649               "<td class=\"link\">" . $cgi->a({-href => href(action=>$tag{'type'}, hash=>$tag{'object'})},
6650                                               $tag{'type'}) . "</td>\n" .
6651               "</tr>\n";
6652         if (defined($tag{'author'})) {
6653                 git_print_authorship_rows(\%tag, 'author');
6654         }
6655         print "</table>\n\n" .
6656               "</div>\n";
6657         print "<div class=\"page_body\">";
6658         my $comment = $tag{'comment'};
6659         foreach my $line (@$comment) {
6660                 chomp $line;
6661                 print esc_html($line, -nbsp=>1) . "<br/>\n";
6662         }
6663         print "</div>\n";
6664         git_footer_html();
6665 }
6666
6667 sub git_blame_common {
6668         my $format = shift || 'porcelain';
6669         if ($format eq 'porcelain' && $input_params{'javascript'}) {
6670                 $format = 'incremental';
6671                 $action = 'blame_incremental'; # for page title etc
6672         }
6673
6674         # permissions
6675         gitweb_check_feature('blame')
6676                 or die_error(403, "Blame view not allowed");
6677
6678         # error checking
6679         die_error(400, "No file name given") unless $file_name;
6680         $hash_base ||= git_get_head_hash($project);
6681         die_error(404, "Couldn't find base commit") unless $hash_base;
6682         my %co = parse_commit($hash_base)
6683                 or die_error(404, "Commit not found");
6684         my $ftype = "blob";
6685         if (!defined $hash) {
6686                 $hash = git_get_hash_by_path($hash_base, $file_name, "blob")
6687                         or die_error(404, "Error looking up file");
6688         } else {
6689                 $ftype = git_get_type($hash);
6690                 if ($ftype !~ "blob") {
6691                         die_error(400, "Object is not a blob");
6692                 }
6693         }
6694
6695         my $fd;
6696         if ($format eq 'incremental') {
6697                 # get file contents (as base)
6698                 open $fd, "-|", git_cmd(), 'cat-file', 'blob', $hash
6699                         or die_error(500, "Open git-cat-file failed");
6700         } elsif ($format eq 'data') {
6701                 # run git-blame --incremental
6702                 open $fd, "-|", git_cmd(), "blame", "--incremental",
6703                         $hash_base, "--", $file_name
6704                         or die_error(500, "Open git-blame --incremental failed");
6705         } else {
6706                 # run git-blame --porcelain
6707                 open $fd, "-|", git_cmd(), "blame", '-p',
6708                         $hash_base, '--', $file_name
6709                         or die_error(500, "Open git-blame --porcelain failed");
6710         }
6711         binmode $fd, ':utf8';
6712
6713         # incremental blame data returns early
6714         if ($format eq 'data') {
6715                 print $cgi->header(
6716                         -type=>"text/plain", -charset => "utf-8",
6717                         -status=> "200 OK");
6718                 local $| = 1; # output autoflush
6719                 while (my $line = <$fd>) {
6720                         print to_utf8($line);
6721                 }
6722                 close $fd
6723                         or print "ERROR $!\n";
6724
6725                 print 'END';
6726                 if (defined $t0 && gitweb_check_feature('timed')) {
6727                         print ' '.
6728                               tv_interval($t0, [ gettimeofday() ]).
6729                               ' '.$number_of_git_cmds;
6730                 }
6731                 print "\n";
6732
6733                 return;
6734         }
6735
6736         # page header
6737         git_header_html();
6738         my $formats_nav =
6739                 $cgi->a({-href => href(action=>"blob", -replay=>1)},
6740                         "blob") .
6741                 " | ";
6742         if ($format eq 'incremental') {
6743                 $formats_nav .=
6744                         $cgi->a({-href => href(action=>"blame", javascript=>0, -replay=>1)},
6745                                 "blame") . " (non-incremental)";
6746         } else {
6747                 $formats_nav .=
6748                         $cgi->a({-href => href(action=>"blame_incremental", -replay=>1)},
6749                                 "blame") . " (incremental)";
6750         }
6751         $formats_nav .=
6752                 " | " .
6753                 $cgi->a({-href => href(action=>"history", -replay=>1)},
6754                         "history") .
6755                 " | " .
6756                 $cgi->a({-href => href(action=>$action, file_name=>$file_name)},
6757                         "HEAD");
6758         git_print_page_nav('','', $hash_base,$co{'tree'},$hash_base, $formats_nav);
6759         git_print_header_div('commit', esc_html($co{'title'}), $hash_base);
6760         git_print_page_path($file_name, $ftype, $hash_base);
6761
6762         # page body
6763         if ($format eq 'incremental') {
6764                 print "<noscript>\n<div class=\"error\"><center><b>\n".
6765                       "This page requires JavaScript to run.\n Use ".
6766                       $cgi->a({-href => href(action=>'blame',javascript=>0,-replay=>1)},
6767                               'this page').
6768                       " instead.\n".
6769                       "</b></center></div>\n</noscript>\n";
6770
6771                 print qq!<div id="progress_bar" style="width: 100%; background-color: yellow"></div>\n!;
6772         }
6773
6774         print qq!<div class="page_body">\n!;
6775         print qq!<div id="progress_info">... / ...</div>\n!
6776                 if ($format eq 'incremental');
6777         print qq!<table id="blame_table" class="blame" width="100%">\n!.
6778               #qq!<col width="5.5em" /><col width="2.5em" /><col width="*" />\n!.
6779               qq!<thead>\n!.
6780               qq!<tr><th>Commit</th><th>Line</th><th>Data</th></tr>\n!.
6781               qq!</thead>\n!.
6782               qq!<tbody>\n!;
6783
6784         my @rev_color = qw(light dark);
6785         my $num_colors = scalar(@rev_color);
6786         my $current_color = 0;
6787
6788         if ($format eq 'incremental') {
6789                 my $color_class = $rev_color[$current_color];
6790
6791                 #contents of a file
6792                 my $linenr = 0;
6793         LINE:
6794                 while (my $line = <$fd>) {
6795                         chomp $line;
6796                         $linenr++;
6797
6798                         print qq!<tr id="l$linenr" class="$color_class">!.
6799                               qq!<td class="sha1"><a href=""> </a></td>!.
6800                               qq!<td class="linenr">!.
6801                               qq!<a class="linenr" href="">$linenr</a></td>!;
6802                         print qq!<td class="pre">! . esc_html($line) . "</td>\n";
6803                         print qq!</tr>\n!;
6804                 }
6805
6806         } else { # porcelain, i.e. ordinary blame
6807                 my %metainfo = (); # saves information about commits
6808
6809                 # blame data
6810         LINE:
6811                 while (my $line = <$fd>) {
6812                         chomp $line;
6813                         # the header: <SHA-1> <src lineno> <dst lineno> [<lines in group>]
6814                         # no <lines in group> for subsequent lines in group of lines
6815                         my ($full_rev, $orig_lineno, $lineno, $group_size) =
6816                            ($line =~ /^([0-9a-f]{40}) (\d+) (\d+)(?: (\d+))?$/);
6817                         if (!exists $metainfo{$full_rev}) {
6818                                 $metainfo{$full_rev} = { 'nprevious' => 0 };
6819                         }
6820                         my $meta = $metainfo{$full_rev};
6821                         my $data;
6822                         while ($data = <$fd>) {
6823                                 chomp $data;
6824                                 last if ($data =~ s/^\t//); # contents of line
6825                                 if ($data =~ /^(\S+)(?: (.*))?$/) {
6826                                         $meta->{$1} = $2 unless exists $meta->{$1};
6827                                 }
6828                                 if ($data =~ /^previous /) {
6829                                         $meta->{'nprevious'}++;
6830                                 }
6831                         }
6832                         my $short_rev = substr($full_rev, 0, 8);
6833                         my $author = $meta->{'author'};
6834                         my %date =
6835                                 parse_date($meta->{'author-time'}, $meta->{'author-tz'});
6836                         my $date = $date{'iso-tz'};
6837                         if ($group_size) {
6838                                 $current_color = ($current_color + 1) % $num_colors;
6839                         }
6840                         my $tr_class = $rev_color[$current_color];
6841                         $tr_class .= ' boundary' if (exists $meta->{'boundary'});
6842                         $tr_class .= ' no-previous' if ($meta->{'nprevious'} == 0);
6843                         $tr_class .= ' multiple-previous' if ($meta->{'nprevious'} > 1);
6844                         print "<tr id=\"l$lineno\" class=\"$tr_class\">\n";
6845                         if ($group_size) {
6846                                 print "<td class=\"sha1\"";
6847                                 print " title=\"". esc_html($author) . ", $date\"";
6848                                 print " rowspan=\"$group_size\"" if ($group_size > 1);
6849                                 print ">";
6850                                 print $cgi->a({-href => href(action=>"commit",
6851                                                              hash=>$full_rev,
6852                                                              file_name=>$file_name)},
6853                                               esc_html($short_rev));
6854                                 if ($group_size >= 2) {
6855                                         my @author_initials = ($author =~ /\b([[:upper:]])\B/g);
6856                                         if (@author_initials) {
6857                                                 print "<br />" .
6858                                                       esc_html(join('', @author_initials));
6859                                                 #           or join('.', ...)
6860                                         }
6861                                 }
6862                                 print "</td>\n";
6863                         }
6864                         # 'previous' <sha1 of parent commit> <filename at commit>
6865                         if (exists $meta->{'previous'} &&
6866                             $meta->{'previous'} =~ /^([a-fA-F0-9]{40}) (.*)$/) {
6867                                 $meta->{'parent'} = $1;
6868                                 $meta->{'file_parent'} = unquote($2);
6869                         }
6870                         my $linenr_commit =
6871                                 exists($meta->{'parent'}) ?
6872                                 $meta->{'parent'} : $full_rev;
6873                         my $linenr_filename =
6874                                 exists($meta->{'file_parent'}) ?
6875                                 $meta->{'file_parent'} : unquote($meta->{'filename'});
6876                         my $blamed = href(action => 'blame',
6877                                           file_name => $linenr_filename,
6878                                           hash_base => $linenr_commit);
6879                         print "<td class=\"linenr\">";
6880                         print $cgi->a({ -href => "$blamed#l$orig_lineno",
6881                                         -class => "linenr" },
6882                                       esc_html($lineno));
6883                         print "</td>";
6884                         print "<td class=\"pre\">" . esc_html($data) . "</td>\n";
6885                         print "</tr>\n";
6886                 } # end while
6887
6888         }
6889
6890         # footer
6891         print "</tbody>\n".
6892               "</table>\n"; # class="blame"
6893         print "</div>\n";   # class="blame_body"
6894         close $fd
6895                 or print "Reading blob failed\n";
6896
6897         git_footer_html();
6898 }
6899
6900 sub git_blame {
6901         git_blame_common();
6902 }
6903
6904 sub git_blame_incremental {
6905         git_blame_common('incremental');
6906 }
6907
6908 sub git_blame_data {
6909         git_blame_common('data');
6910 }
6911
6912 sub git_tags {
6913         my $head = git_get_head_hash($project);
6914         git_header_html();
6915         git_print_page_nav('','', $head,undef,$head,format_ref_views('tags'));
6916         git_print_header_div('summary', $project);
6917
6918         my @tagslist = git_get_tags_list();
6919         if (@tagslist) {
6920                 git_tags_body(\@tagslist);
6921         }
6922         git_footer_html();
6923 }
6924
6925 sub git_heads {
6926         my $head = git_get_head_hash($project);
6927         git_header_html();
6928         git_print_page_nav('','', $head,undef,$head,format_ref_views('heads'));
6929         git_print_header_div('summary', $project);
6930
6931         my @headslist = git_get_heads_list();
6932         if (@headslist) {
6933                 git_heads_body(\@headslist, $head);
6934         }
6935         git_footer_html();
6936 }
6937
6938 # used both for single remote view and for list of all the remotes
6939 sub git_remotes {
6940         gitweb_check_feature('remote_heads')
6941                 or die_error(403, "Remote heads view is disabled");
6942
6943         my $head = git_get_head_hash($project);
6944         my $remote = $input_params{'hash'};
6945
6946         my $remotedata = git_get_remotes_list($remote);
6947         die_error(500, "Unable to get remote information") unless defined $remotedata;
6948
6949         unless (%$remotedata) {
6950                 die_error(404, defined $remote ?
6951                         "Remote $remote not found" :
6952                         "No remotes found");
6953         }
6954
6955         git_header_html(undef, undef, -action_extra => $remote);
6956         git_print_page_nav('', '',  $head, undef, $head,
6957                 format_ref_views($remote ? '' : 'remotes'));
6958
6959         fill_remote_heads($remotedata);
6960         if (defined $remote) {
6961                 git_print_header_div('remotes', "$remote remote for $project");
6962                 git_remote_block($remote, $remotedata->{$remote}, undef, $head);
6963         } else {
6964                 git_print_header_div('summary', "$project remotes");
6965                 git_remotes_body($remotedata, undef, $head);
6966         }
6967
6968         git_footer_html();
6969 }
6970
6971 sub git_blob_plain {
6972         my $type = shift;
6973         my $expires;
6974
6975         if (!defined $hash) {
6976                 if (defined $file_name) {
6977                         my $base = $hash_base || git_get_head_hash($project);
6978                         $hash = git_get_hash_by_path($base, $file_name, "blob")
6979                                 or die_error(404, "Cannot find file");
6980                 } else {
6981                         die_error(400, "No file name defined");
6982                 }
6983         } elsif ($hash =~ m/^[0-9a-fA-F]{40}$/) {
6984                 # blobs defined by non-textual hash id's can be cached
6985                 $expires = "+1d";
6986         }
6987
6988         open my $fd, "-|", git_cmd(), "cat-file", "blob", $hash
6989                 or die_error(500, "Open git-cat-file blob '$hash' failed");
6990
6991         # content-type (can include charset)
6992         $type = blob_contenttype($fd, $file_name, $type);
6993
6994         # "save as" filename, even when no $file_name is given
6995         my $save_as = "$hash";
6996         if (defined $file_name) {
6997                 $save_as = $file_name;
6998         } elsif ($type =~ m/^text\//) {
6999                 $save_as .= '.txt';
7000         }
7001
7002         # With XSS prevention on, blobs of all types except a few known safe
7003         # ones are served with "Content-Disposition: attachment" to make sure
7004         # they don't run in our security domain.  For certain image types,
7005         # blob view writes an <img> tag referring to blob_plain view, and we
7006         # want to be sure not to break that by serving the image as an
7007         # attachment (though Firefox 3 doesn't seem to care).
7008         my $sandbox = $prevent_xss &&
7009                 $type !~ m!^(?:text/[a-z]+|image/(?:gif|png|jpeg))(?:[ ;]|$)!;
7010
7011         # serve text/* as text/plain
7012         if ($prevent_xss &&
7013             ($type =~ m!^text/[a-z]+\b(.*)$! ||
7014              ($type =~ m!^[a-z]+/[a-z]\+xml\b(.*)$! && -T $fd))) {
7015                 my $rest = $1;
7016                 $rest = defined $rest ? $rest : '';
7017                 $type = "text/plain$rest";
7018         }
7019
7020         print $cgi->header(
7021                 -type => $type,
7022                 -expires => $expires,
7023                 -content_disposition =>
7024                         ($sandbox ? 'attachment' : 'inline')
7025                         . '; filename="' . $save_as . '"');
7026         local $/ = undef;
7027         binmode STDOUT, ':raw';
7028         print <$fd>;
7029         binmode STDOUT, ':utf8'; # as set at the beginning of gitweb.cgi
7030         close $fd;
7031 }
7032
7033 sub git_blob {
7034         my $expires;
7035
7036         if (!defined $hash) {
7037                 if (defined $file_name) {
7038                         my $base = $hash_base || git_get_head_hash($project);
7039                         $hash = git_get_hash_by_path($base, $file_name, "blob")
7040                                 or die_error(404, "Cannot find file");
7041                 } else {
7042                         die_error(400, "No file name defined");
7043                 }
7044         } elsif ($hash =~ m/^[0-9a-fA-F]{40}$/) {
7045                 # blobs defined by non-textual hash id's can be cached
7046                 $expires = "+1d";
7047         }
7048
7049         my $have_blame = gitweb_check_feature('blame');
7050         open my $fd, "-|", git_cmd(), "cat-file", "blob", $hash
7051                 or die_error(500, "Couldn't cat $file_name, $hash");
7052         my $mimetype = blob_mimetype($fd, $file_name);
7053         # use 'blob_plain' (aka 'raw') view for files that cannot be displayed
7054         if ($mimetype !~ m!^(?:text/|image/(?:gif|png|jpeg)$)! && -B $fd) {
7055                 close $fd;
7056                 return git_blob_plain($mimetype);
7057         }
7058         # we can have blame only for text/* mimetype
7059         $have_blame &&= ($mimetype =~ m!^text/!);
7060
7061         my $highlight = gitweb_check_feature('highlight');
7062         my $syntax = guess_file_syntax($highlight, $mimetype, $file_name);
7063         $fd = run_highlighter($fd, $highlight, $syntax)
7064                 if $syntax;
7065
7066         git_header_html(undef, $expires);
7067         my $formats_nav = '';
7068         if (defined $hash_base && (my %co = parse_commit($hash_base))) {
7069                 if (defined $file_name) {
7070                         if ($have_blame) {
7071                                 $formats_nav .=
7072                                         $cgi->a({-href => href(action=>"blame", -replay=>1)},
7073                                                 "blame") .
7074                                         " | ";
7075                         }
7076                         $formats_nav .=
7077                                 $cgi->a({-href => href(action=>"history", -replay=>1)},
7078                                         "history") .
7079                                 " | " .
7080                                 $cgi->a({-href => href(action=>"blob_plain", -replay=>1)},
7081                                         "raw") .
7082                                 " | " .
7083                                 $cgi->a({-href => href(action=>"blob",
7084                                                        hash_base=>"HEAD", file_name=>$file_name)},
7085                                         "HEAD");
7086                 } else {
7087                         $formats_nav .=
7088                                 $cgi->a({-href => href(action=>"blob_plain", -replay=>1)},
7089                                         "raw");
7090                 }
7091                 git_print_page_nav('','', $hash_base,$co{'tree'},$hash_base, $formats_nav);
7092                 git_print_header_div('commit', esc_html($co{'title'}), $hash_base);
7093         } else {
7094                 print "<div class=\"page_nav\">\n" .
7095                       "<br/><br/></div>\n" .
7096                       "<div class=\"title\">".esc_html($hash)."</div>\n";
7097         }
7098         git_print_page_path($file_name, "blob", $hash_base);
7099         print "<div class=\"page_body\">\n";
7100         if ($mimetype =~ m!^image/!) {
7101                 print qq!<img class="blob" type="!.esc_attr($mimetype).qq!"!;
7102                 if ($file_name) {
7103                         print qq! alt="!.esc_attr($file_name).qq!" title="!.esc_attr($file_name).qq!"!;
7104                 }
7105                 print qq! src="! .
7106                       href(action=>"blob_plain", hash=>$hash,
7107                            hash_base=>$hash_base, file_name=>$file_name) .
7108                       qq!" />\n!;
7109         } else {
7110                 my $nr;
7111                 while (my $line = <$fd>) {
7112                         chomp $line;
7113                         $nr++;
7114                         $line = untabify($line);
7115                         printf qq!<div class="pre"><a id="l%i" href="%s#l%i" class="linenr">%4i</a> %s</div>\n!,
7116                                $nr, esc_attr(href(-replay => 1)), $nr, $nr,
7117                                $syntax ? sanitize($line) : esc_html($line, -nbsp=>1);
7118                 }
7119         }
7120         close $fd
7121                 or print "Reading blob failed.\n";
7122         print "</div>";
7123         git_footer_html();
7124 }
7125
7126 sub git_tree {
7127         if (!defined $hash_base) {
7128                 $hash_base = "HEAD";
7129         }
7130         if (!defined $hash) {
7131                 if (defined $file_name) {
7132                         $hash = git_get_hash_by_path($hash_base, $file_name, "tree");
7133                 } else {
7134                         $hash = $hash_base;
7135                 }
7136         }
7137         die_error(404, "No such tree") unless defined($hash);
7138
7139         my $show_sizes = gitweb_check_feature('show-sizes');
7140         my $have_blame = gitweb_check_feature('blame');
7141
7142         my @entries = ();
7143         {
7144                 local $/ = "\0";
7145                 open my $fd, "-|", git_cmd(), "ls-tree", '-z',
7146                         ($show_sizes ? '-l' : ()), @extra_options, $hash
7147                         or die_error(500, "Open git-ls-tree failed");
7148                 @entries = map { chomp; $_ } <$fd>;
7149                 close $fd
7150                         or die_error(404, "Reading tree failed");
7151         }
7152
7153         my $refs = git_get_references();
7154         my $ref = format_ref_marker($refs, $hash_base);
7155         git_header_html();
7156         my $basedir = '';
7157         if (defined $hash_base && (my %co = parse_commit($hash_base))) {
7158                 my @views_nav = ();
7159                 if (defined $file_name) {
7160                         push @views_nav,
7161                                 $cgi->a({-href => href(action=>"history", -replay=>1)},
7162                                         "history"),
7163                                 $cgi->a({-href => href(action=>"tree",
7164                                                        hash_base=>"HEAD", file_name=>$file_name)},
7165                                         "HEAD"),
7166                 }
7167                 my $snapshot_links = format_snapshot_links($hash);
7168                 if (defined $snapshot_links) {
7169                         # FIXME: Should be available when we have no hash base as well.
7170                         push @views_nav, $snapshot_links;
7171                 }
7172                 git_print_page_nav('tree','', $hash_base, undef, undef,
7173                                    join(' | ', @views_nav));
7174                 git_print_header_div('commit', esc_html($co{'title'}) . $ref, $hash_base);
7175         } else {
7176                 undef $hash_base;
7177                 print "<div class=\"page_nav\">\n";
7178                 print "<br/><br/></div>\n";
7179                 print "<div class=\"title\">".esc_html($hash)."</div>\n";
7180         }
7181         if (defined $file_name) {
7182                 $basedir = $file_name;
7183                 if ($basedir ne '' && substr($basedir, -1) ne '/') {
7184                         $basedir .= '/';
7185                 }
7186                 git_print_page_path($file_name, 'tree', $hash_base);
7187         }
7188         print "<div class=\"page_body\">\n";
7189         print "<table class=\"tree\">\n";
7190         my $alternate = 1;
7191         # '..' (top directory) link if possible
7192         if (defined $hash_base &&
7193             defined $file_name && $file_name =~ m![^/]+$!) {
7194                 if ($alternate) {
7195                         print "<tr class=\"dark\">\n";
7196                 } else {
7197                         print "<tr class=\"light\">\n";
7198                 }
7199                 $alternate ^= 1;
7200
7201                 my $up = $file_name;
7202                 $up =~ s!/?[^/]+$!!;
7203                 undef $up unless $up;
7204                 # based on git_print_tree_entry
7205                 print '<td class="mode">' . mode_str('040000') . "</td>\n";
7206                 print '<td class="size">&nbsp;</td>'."\n" if $show_sizes;
7207                 print '<td class="list">';
7208                 print $cgi->a({-href => href(action=>"tree",
7209                                              hash_base=>$hash_base,
7210                                              file_name=>$up)},
7211                               "..");
7212                 print "</td>\n";
7213                 print "<td class=\"link\"></td>\n";
7214
7215                 print "</tr>\n";
7216         }
7217         foreach my $line (@entries) {
7218                 my %t = parse_ls_tree_line($line, -z => 1, -l => $show_sizes);
7219
7220                 if ($alternate) {
7221                         print "<tr class=\"dark\">\n";
7222                 } else {
7223                         print "<tr class=\"light\">\n";
7224                 }
7225                 $alternate ^= 1;
7226
7227                 git_print_tree_entry(\%t, $basedir, $hash_base, $have_blame);
7228
7229                 print "</tr>\n";
7230         }
7231         print "</table>\n" .
7232               "</div>";
7233         git_footer_html();
7234 }
7235
7236 sub sanitize_for_filename {
7237     my $name = shift;
7238
7239     $name =~ s!/!-!g;
7240     $name =~ s/[^[:alnum:]_.-]//g;
7241
7242     return $name;
7243 }
7244
7245 sub snapshot_name {
7246         my ($project, $hash) = @_;
7247
7248         # path/to/project.git  -> project
7249         # path/to/project/.git -> project
7250         my $name = to_utf8($project);
7251         $name =~ s,([^/])/*\.git$,$1,;
7252         $name = sanitize_for_filename(basename($name));
7253
7254         my $ver = $hash;
7255         if ($hash =~ /^[0-9a-fA-F]+$/) {
7256                 # shorten SHA-1 hash
7257                 my $full_hash = git_get_full_hash($project, $hash);
7258                 if ($full_hash =~ /^$hash/ && length($hash) > 7) {
7259                         $ver = git_get_short_hash($project, $hash);
7260                 }
7261         } elsif ($hash =~ m!^refs/tags/(.*)$!) {
7262                 # tags don't need shortened SHA-1 hash
7263                 $ver = $1;
7264         } else {
7265                 # branches and other need shortened SHA-1 hash
7266                 my $strip_refs = join '|', map { quotemeta } get_branch_refs();
7267                 if ($hash =~ m!^refs/($strip_refs|remotes)/(.*)$!) {
7268                         my $ref_dir = (defined $1) ? $1 : '';
7269                         $ver = $2;
7270
7271                         $ref_dir = sanitize_for_filename($ref_dir);
7272                         # for refs neither in heads nor remotes we want to
7273                         # add a ref dir to archive name
7274                         if ($ref_dir ne '' and $ref_dir ne 'heads' and $ref_dir ne 'remotes') {
7275                                 $ver = $ref_dir . '-' . $ver;
7276                         }
7277                 }
7278                 $ver .= '-' . git_get_short_hash($project, $hash);
7279         }
7280         # special case of sanitization for filename - we change
7281         # slashes to dots instead of dashes
7282         # in case of hierarchical branch names
7283         $ver =~ s!/!.!g;
7284         $ver =~ s/[^[:alnum:]_.-]//g;
7285
7286         # name = project-version_string
7287         $name = "$name-$ver";
7288
7289         return wantarray ? ($name, $name) : $name;
7290 }
7291
7292 sub exit_if_unmodified_since {
7293         my ($latest_epoch) = @_;
7294         our $cgi;
7295
7296         my $if_modified = $cgi->http('IF_MODIFIED_SINCE');
7297         if (defined $if_modified) {
7298                 my $since;
7299                 if (eval { require HTTP::Date; 1; }) {
7300                         $since = HTTP::Date::str2time($if_modified);
7301                 } elsif (eval { require Time::ParseDate; 1; }) {
7302                         $since = Time::ParseDate::parsedate($if_modified, GMT => 1);
7303                 }
7304                 if (defined $since && $latest_epoch <= $since) {
7305                         my %latest_date = parse_date($latest_epoch);
7306                         print $cgi->header(
7307                                 -last_modified => $latest_date{'rfc2822'},
7308                                 -status => '304 Not Modified');
7309                         goto DONE_GITWEB;
7310                 }
7311         }
7312 }
7313
7314 sub git_snapshot {
7315         my $format = $input_params{'snapshot_format'};
7316         if (!@snapshot_fmts) {
7317                 die_error(403, "Snapshots not allowed");
7318         }
7319         # default to first supported snapshot format
7320         $format ||= $snapshot_fmts[0];
7321         if ($format !~ m/^[a-z0-9]+$/) {
7322                 die_error(400, "Invalid snapshot format parameter");
7323         } elsif (!exists($known_snapshot_formats{$format})) {
7324                 die_error(400, "Unknown snapshot format");
7325         } elsif ($known_snapshot_formats{$format}{'disabled'}) {
7326                 die_error(403, "Snapshot format not allowed");
7327         } elsif (!grep($_ eq $format, @snapshot_fmts)) {
7328                 die_error(403, "Unsupported snapshot format");
7329         }
7330
7331         my $type = git_get_type("$hash^{}");
7332         if (!$type) {
7333                 die_error(404, 'Object does not exist');
7334         }  elsif ($type eq 'blob') {
7335                 die_error(400, 'Object is not a tree-ish');
7336         }
7337
7338         my ($name, $prefix) = snapshot_name($project, $hash);
7339         my $filename = "$name$known_snapshot_formats{$format}{'suffix'}";
7340
7341         my %co = parse_commit($hash);
7342         exit_if_unmodified_since($co{'committer_epoch'}) if %co;
7343
7344         my $cmd = quote_command(
7345                 git_cmd(), 'archive',
7346                 "--format=$known_snapshot_formats{$format}{'format'}",
7347                 "--prefix=$prefix/", $hash);
7348         if (exists $known_snapshot_formats{$format}{'compressor'}) {
7349                 $cmd .= ' | ' . quote_command(@{$known_snapshot_formats{$format}{'compressor'}});
7350         }
7351
7352         $filename =~ s/(["\\])/\\$1/g;
7353         my %latest_date;
7354         if (%co) {
7355                 %latest_date = parse_date($co{'committer_epoch'}, $co{'committer_tz'});
7356         }
7357
7358         print $cgi->header(
7359                 -type => $known_snapshot_formats{$format}{'type'},
7360                 -content_disposition => 'inline; filename="' . $filename . '"',
7361                 %co ? (-last_modified => $latest_date{'rfc2822'}) : (),
7362                 -status => '200 OK');
7363
7364         open my $fd, "-|", $cmd
7365                 or die_error(500, "Execute git-archive failed");
7366         binmode STDOUT, ':raw';
7367         print <$fd>;
7368         binmode STDOUT, ':utf8'; # as set at the beginning of gitweb.cgi
7369         close $fd;
7370 }
7371
7372 sub git_log_generic {
7373         my ($fmt_name, $body_subr, $base, $parent, $file_name, $file_hash) = @_;
7374
7375         my $head = git_get_head_hash($project);
7376         if (!defined $base) {
7377                 $base = $head;
7378         }
7379         if (!defined $page) {
7380                 $page = 0;
7381         }
7382         my $refs = git_get_references();
7383
7384         my $commit_hash = $base;
7385         if (defined $parent) {
7386                 $commit_hash = "$parent..$base";
7387         }
7388         my @commitlist =
7389                 parse_commits($commit_hash, 101, (100 * $page),
7390                               defined $file_name ? ($file_name, "--full-history") : ());
7391
7392         my $ftype;
7393         if (!defined $file_hash && defined $file_name) {
7394                 # some commits could have deleted file in question,
7395                 # and not have it in tree, but one of them has to have it
7396                 for (my $i = 0; $i < @commitlist; $i++) {
7397                         $file_hash = git_get_hash_by_path($commitlist[$i]{'id'}, $file_name);
7398                         last if defined $file_hash;
7399                 }
7400         }
7401         if (defined $file_hash) {
7402                 $ftype = git_get_type($file_hash);
7403         }
7404         if (defined $file_name && !defined $ftype) {
7405                 die_error(500, "Unknown type of object");
7406         }
7407         my %co;
7408         if (defined $file_name) {
7409                 %co = parse_commit($base)
7410                         or die_error(404, "Unknown commit object");
7411         }
7412
7413
7414         my $paging_nav = format_paging_nav($fmt_name, $page, $#commitlist >= 100);
7415         my $next_link = '';
7416         if ($#commitlist >= 100) {
7417                 $next_link =
7418                         $cgi->a({-href => href(-replay=>1, page=>$page+1),
7419                                  -accesskey => "n", -title => "Alt-n"}, "next");
7420         }
7421         my $patch_max = gitweb_get_feature('patches');
7422         if ($patch_max && !defined $file_name) {
7423                 if ($patch_max < 0 || @commitlist <= $patch_max) {
7424                         $paging_nav .= " &sdot; " .
7425                                 $cgi->a({-href => href(action=>"patches", -replay=>1)},
7426                                         "patches");
7427                 }
7428         }
7429
7430         git_header_html();
7431         git_print_page_nav($fmt_name,'', $hash,$hash,$hash, $paging_nav);
7432         if (defined $file_name) {
7433                 git_print_header_div('commit', esc_html($co{'title'}), $base);
7434         } else {
7435                 git_print_header_div('summary', $project)
7436         }
7437         git_print_page_path($file_name, $ftype, $hash_base)
7438                 if (defined $file_name);
7439
7440         $body_subr->(\@commitlist, 0, 99, $refs, $next_link,
7441                      $file_name, $file_hash, $ftype);
7442
7443         git_footer_html();
7444 }
7445
7446 sub git_log {
7447         git_log_generic('log', \&git_log_body,
7448                         $hash, $hash_parent);
7449 }
7450
7451 sub git_commit {
7452         $hash ||= $hash_base || "HEAD";
7453         my %co = parse_commit($hash)
7454             or die_error(404, "Unknown commit object");
7455
7456         my $parent  = $co{'parent'};
7457         my $parents = $co{'parents'}; # listref
7458
7459         # we need to prepare $formats_nav before any parameter munging
7460         my $formats_nav;
7461         if (!defined $parent) {
7462                 # --root commitdiff
7463                 $formats_nav .= '(initial)';
7464         } elsif (@$parents == 1) {
7465                 # single parent commit
7466                 $formats_nav .=
7467                         '(parent: ' .
7468                         $cgi->a({-href => href(action=>"commit",
7469                                                hash=>$parent)},
7470                                 esc_html(substr($parent, 0, 7))) .
7471                         ')';
7472         } else {
7473                 # merge commit
7474                 $formats_nav .=
7475                         '(merge: ' .
7476                         join(' ', map {
7477                                 $cgi->a({-href => href(action=>"commit",
7478                                                        hash=>$_)},
7479                                         esc_html(substr($_, 0, 7)));
7480                         } @$parents ) .
7481                         ')';
7482         }
7483         if (gitweb_check_feature('patches') && @$parents <= 1) {
7484                 $formats_nav .= " | " .
7485                         $cgi->a({-href => href(action=>"patch", -replay=>1)},
7486                                 "patch");
7487         }
7488
7489         if (!defined $parent) {
7490                 $parent = "--root";
7491         }
7492         my @difftree;
7493         open my $fd, "-|", git_cmd(), "diff-tree", '-r', "--no-commit-id",
7494                 @diff_opts,
7495                 (@$parents <= 1 ? $parent : '-c'),
7496                 $hash, "--"
7497                 or die_error(500, "Open git-diff-tree failed");
7498         @difftree = map { chomp; $_ } <$fd>;
7499         close $fd or die_error(404, "Reading git-diff-tree failed");
7500
7501         # non-textual hash id's can be cached
7502         my $expires;
7503         if ($hash =~ m/^[0-9a-fA-F]{40}$/) {
7504                 $expires = "+1d";
7505         }
7506         my $refs = git_get_references();
7507         my $ref = format_ref_marker($refs, $co{'id'});
7508
7509         git_header_html(undef, $expires);
7510         git_print_page_nav('commit', '',
7511                            $hash, $co{'tree'}, $hash,
7512                            $formats_nav);
7513
7514         if (defined $co{'parent'}) {
7515                 git_print_header_div('commitdiff', esc_html($co{'title'}) . $ref, $hash);
7516         } else {
7517                 git_print_header_div('tree', esc_html($co{'title'}) . $ref, $co{'tree'}, $hash);
7518         }
7519         print "<div class=\"title_text\">\n" .
7520               "<table class=\"object_header\">\n";
7521         git_print_authorship_rows(\%co);
7522         print "<tr><td>commit</td><td class=\"sha1\">$co{'id'}</td></tr>\n";
7523         print "<tr>" .
7524               "<td>tree</td>" .
7525               "<td class=\"sha1\">" .
7526               $cgi->a({-href => href(action=>"tree", hash=>$co{'tree'}, hash_base=>$hash),
7527                        class => "list"}, $co{'tree'}) .
7528               "</td>" .
7529               "<td class=\"link\">" .
7530               $cgi->a({-href => href(action=>"tree", hash=>$co{'tree'}, hash_base=>$hash)},
7531                       "tree");
7532         my $snapshot_links = format_snapshot_links($hash);
7533         if (defined $snapshot_links) {
7534                 print " | " . $snapshot_links;
7535         }
7536         print "</td>" .
7537               "</tr>\n";
7538
7539         foreach my $par (@$parents) {
7540                 print "<tr>" .
7541                       "<td>parent</td>" .
7542                       "<td class=\"sha1\">" .
7543                       $cgi->a({-href => href(action=>"commit", hash=>$par),
7544                                class => "list"}, $par) .
7545                       "</td>" .
7546                       "<td class=\"link\">" .
7547                       $cgi->a({-href => href(action=>"commit", hash=>$par)}, "commit") .
7548                       " | " .
7549                       $cgi->a({-href => href(action=>"commitdiff", hash=>$hash, hash_parent=>$par)}, "diff") .
7550                       "</td>" .
7551                       "</tr>\n";
7552         }
7553         print "</table>".
7554               "</div>\n";
7555
7556         print "<div class=\"page_body\">\n";
7557         git_print_log($co{'comment'});
7558         print "</div>\n";
7559
7560         git_difftree_body(\@difftree, $hash, @$parents);
7561
7562         git_footer_html();
7563 }
7564
7565 sub git_object {
7566         # object is defined by:
7567         # - hash or hash_base alone
7568         # - hash_base and file_name
7569         my $type;
7570
7571         # - hash or hash_base alone
7572         if ($hash || ($hash_base && !defined $file_name)) {
7573                 my $object_id = $hash || $hash_base;
7574
7575                 open my $fd, "-|", quote_command(
7576                         git_cmd(), 'cat-file', '-t', $object_id) . ' 2> /dev/null'
7577                         or die_error(404, "Object does not exist");
7578                 $type = <$fd>;
7579                 defined $type && chomp $type;
7580                 close $fd
7581                         or die_error(404, "Object does not exist");
7582
7583         # - hash_base and file_name
7584         } elsif ($hash_base && defined $file_name) {
7585                 $file_name =~ s,/+$,,;
7586
7587                 system(git_cmd(), "cat-file", '-e', $hash_base) == 0
7588                         or die_error(404, "Base object does not exist");
7589
7590                 # here errors should not happen
7591                 open my $fd, "-|", git_cmd(), "ls-tree", $hash_base, "--", $file_name
7592                         or die_error(500, "Open git-ls-tree failed");
7593                 my $line = <$fd>;
7594                 close $fd;
7595
7596                 #'100644 blob 0fa3f3a66fb6a137f6ec2c19351ed4d807070ffa  panic.c'
7597                 unless ($line && $line =~ m/^([0-9]+) (.+) ([0-9a-fA-F]{40})\t/) {
7598                         die_error(404, "File or directory for given base does not exist");
7599                 }
7600                 $type = $2;
7601                 $hash = $3;
7602         } else {
7603                 die_error(400, "Not enough information to find object");
7604         }
7605
7606         print $cgi->redirect(-uri => href(action=>$type, -full=>1,
7607                                           hash=>$hash, hash_base=>$hash_base,
7608                                           file_name=>$file_name),
7609                              -status => '302 Found');
7610 }
7611
7612 sub git_blobdiff {
7613         my $format = shift || 'html';
7614         my $diff_style = $input_params{'diff_style'} || 'inline';
7615
7616         my $fd;
7617         my @difftree;
7618         my %diffinfo;
7619         my $expires;
7620
7621         # preparing $fd and %diffinfo for git_patchset_body
7622         # new style URI
7623         if (defined $hash_base && defined $hash_parent_base) {
7624                 if (defined $file_name) {
7625                         # read raw output
7626                         open $fd, "-|", git_cmd(), "diff-tree", '-r', @diff_opts,
7627                                 $hash_parent_base, $hash_base,
7628                                 "--", (defined $file_parent ? $file_parent : ()), $file_name
7629                                 or die_error(500, "Open git-diff-tree failed");
7630                         @difftree = map { chomp; $_ } <$fd>;
7631                         close $fd
7632                                 or die_error(404, "Reading git-diff-tree failed");
7633                         @difftree
7634                                 or die_error(404, "Blob diff not found");
7635
7636                 } elsif (defined $hash &&
7637                          $hash =~ /[0-9a-fA-F]{40}/) {
7638                         # try to find filename from $hash
7639
7640                         # read filtered raw output
7641                         open $fd, "-|", git_cmd(), "diff-tree", '-r', @diff_opts,
7642                                 $hash_parent_base, $hash_base, "--"
7643                                 or die_error(500, "Open git-diff-tree failed");
7644                         @difftree =
7645                                 # ':100644 100644 03b21826... 3b93d5e7... M     ls-files.c'
7646                                 # $hash == to_id
7647                                 grep { /^:[0-7]{6} [0-7]{6} [0-9a-fA-F]{40} $hash/ }
7648                                 map { chomp; $_ } <$fd>;
7649                         close $fd
7650                                 or die_error(404, "Reading git-diff-tree failed");
7651                         @difftree
7652                                 or die_error(404, "Blob diff not found");
7653
7654                 } else {
7655                         die_error(400, "Missing one of the blob diff parameters");
7656                 }
7657
7658                 if (@difftree > 1) {
7659                         die_error(400, "Ambiguous blob diff specification");
7660                 }
7661
7662                 %diffinfo = parse_difftree_raw_line($difftree[0]);
7663                 $file_parent ||= $diffinfo{'from_file'} || $file_name;
7664                 $file_name   ||= $diffinfo{'to_file'};
7665
7666                 $hash_parent ||= $diffinfo{'from_id'};
7667                 $hash        ||= $diffinfo{'to_id'};
7668
7669                 # non-textual hash id's can be cached
7670                 if ($hash_base =~ m/^[0-9a-fA-F]{40}$/ &&
7671                     $hash_parent_base =~ m/^[0-9a-fA-F]{40}$/) {
7672                         $expires = '+1d';
7673                 }
7674
7675                 # open patch output
7676                 open $fd, "-|", git_cmd(), "diff-tree", '-r', @diff_opts,
7677                         '-p', ($format eq 'html' ? "--full-index" : ()),
7678                         $hash_parent_base, $hash_base,
7679                         "--", (defined $file_parent ? $file_parent : ()), $file_name
7680                         or die_error(500, "Open git-diff-tree failed");
7681         }
7682
7683         # old/legacy style URI -- not generated anymore since 1.4.3.
7684         if (!%diffinfo) {
7685                 die_error('404 Not Found', "Missing one of the blob diff parameters")
7686         }
7687
7688         # header
7689         if ($format eq 'html') {
7690                 my $formats_nav =
7691                         $cgi->a({-href => href(action=>"blobdiff_plain", -replay=>1)},
7692                                 "raw");
7693                 $formats_nav .= diff_style_nav($diff_style);
7694                 git_header_html(undef, $expires);
7695                 if (defined $hash_base && (my %co = parse_commit($hash_base))) {
7696                         git_print_page_nav('','', $hash_base,$co{'tree'},$hash_base, $formats_nav);
7697                         git_print_header_div('commit', esc_html($co{'title'}), $hash_base);
7698                 } else {
7699                         print "<div class=\"page_nav\"><br/>$formats_nav<br/></div>\n";
7700                         print "<div class=\"title\">".esc_html("$hash vs $hash_parent")."</div>\n";
7701                 }
7702                 if (defined $file_name) {
7703                         git_print_page_path($file_name, "blob", $hash_base);
7704                 } else {
7705                         print "<div class=\"page_path\"></div>\n";
7706                 }
7707
7708         } elsif ($format eq 'plain') {
7709                 print $cgi->header(
7710                         -type => 'text/plain',
7711                         -charset => 'utf-8',
7712                         -expires => $expires,
7713                         -content_disposition => 'inline; filename="' . "$file_name" . '.patch"');
7714
7715                 print "X-Git-Url: " . $cgi->self_url() . "\n\n";
7716
7717         } else {
7718                 die_error(400, "Unknown blobdiff format");
7719         }
7720
7721         # patch
7722         if ($format eq 'html') {
7723                 print "<div class=\"page_body\">\n";
7724
7725                 git_patchset_body($fd, $diff_style,
7726                                   [ \%diffinfo ], $hash_base, $hash_parent_base);
7727                 close $fd;
7728
7729                 print "</div>\n"; # class="page_body"
7730                 git_footer_html();
7731
7732         } else {
7733                 while (my $line = <$fd>) {
7734                         $line =~ s!a/($hash|$hash_parent)!'a/'.esc_path($diffinfo{'from_file'})!eg;
7735                         $line =~ s!b/($hash|$hash_parent)!'b/'.esc_path($diffinfo{'to_file'})!eg;
7736
7737                         print $line;
7738
7739                         last if $line =~ m!^\+\+\+!;
7740                 }
7741                 local $/ = undef;
7742                 print <$fd>;
7743                 close $fd;
7744         }
7745 }
7746
7747 sub git_blobdiff_plain {
7748         git_blobdiff('plain');
7749 }
7750
7751 # assumes that it is added as later part of already existing navigation,
7752 # so it returns "| foo | bar" rather than just "foo | bar"
7753 sub diff_style_nav {
7754         my ($diff_style, $is_combined) = @_;
7755         $diff_style ||= 'inline';
7756
7757         return "" if ($is_combined);
7758
7759         my @styles = (inline => 'inline', 'sidebyside' => 'side by side');
7760         my %styles = @styles;
7761         @styles =
7762                 @styles[ map { $_ * 2 } 0..$#styles/2 ];
7763
7764         return join '',
7765                 map { " | ".$_ }
7766                 map {
7767                         $_ eq $diff_style ? $styles{$_} :
7768                         $cgi->a({-href => href(-replay=>1, diff_style => $_)}, $styles{$_})
7769                 } @styles;
7770 }
7771
7772 sub git_commitdiff {
7773         my %params = @_;
7774         my $format = $params{-format} || 'html';
7775         my $diff_style = $input_params{'diff_style'} || 'inline';
7776
7777         my ($patch_max) = gitweb_get_feature('patches');
7778         if ($format eq 'patch') {
7779                 die_error(403, "Patch view not allowed") unless $patch_max;
7780         }
7781
7782         $hash ||= $hash_base || "HEAD";
7783         my %co = parse_commit($hash)
7784             or die_error(404, "Unknown commit object");
7785
7786         # choose format for commitdiff for merge
7787         if (! defined $hash_parent && @{$co{'parents'}} > 1) {
7788                 $hash_parent = '--cc';
7789         }
7790         # we need to prepare $formats_nav before almost any parameter munging
7791         my $formats_nav;
7792         if ($format eq 'html') {
7793                 $formats_nav =
7794                         $cgi->a({-href => href(action=>"commitdiff_plain", -replay=>1)},
7795                                 "raw");
7796                 if ($patch_max && @{$co{'parents'}} <= 1) {
7797                         $formats_nav .= " | " .
7798                                 $cgi->a({-href => href(action=>"patch", -replay=>1)},
7799                                         "patch");
7800                 }
7801                 $formats_nav .= diff_style_nav($diff_style, @{$co{'parents'}} > 1);
7802
7803                 if (defined $hash_parent &&
7804                     $hash_parent ne '-c' && $hash_parent ne '--cc') {
7805                         # commitdiff with two commits given
7806                         my $hash_parent_short = $hash_parent;
7807                         if ($hash_parent =~ m/^[0-9a-fA-F]{40}$/) {
7808                                 $hash_parent_short = substr($hash_parent, 0, 7);
7809                         }
7810                         $formats_nav .=
7811                                 ' (from';
7812                         for (my $i = 0; $i < @{$co{'parents'}}; $i++) {
7813                                 if ($co{'parents'}[$i] eq $hash_parent) {
7814                                         $formats_nav .= ' parent ' . ($i+1);
7815                                         last;
7816                                 }
7817                         }
7818                         $formats_nav .= ': ' .
7819                                 $cgi->a({-href => href(-replay=>1,
7820                                                        hash=>$hash_parent, hash_base=>undef)},
7821                                         esc_html($hash_parent_short)) .
7822                                 ')';
7823                 } elsif (!$co{'parent'}) {
7824                         # --root commitdiff
7825                         $formats_nav .= ' (initial)';
7826                 } elsif (scalar @{$co{'parents'}} == 1) {
7827                         # single parent commit
7828                         $formats_nav .=
7829                                 ' (parent: ' .
7830                                 $cgi->a({-href => href(-replay=>1,
7831                                                        hash=>$co{'parent'}, hash_base=>undef)},
7832                                         esc_html(substr($co{'parent'}, 0, 7))) .
7833                                 ')';
7834                 } else {
7835                         # merge commit
7836                         if ($hash_parent eq '--cc') {
7837                                 $formats_nav .= ' | ' .
7838                                         $cgi->a({-href => href(-replay=>1,
7839                                                                hash=>$hash, hash_parent=>'-c')},
7840                                                 'combined');
7841                         } else { # $hash_parent eq '-c'
7842                                 $formats_nav .= ' | ' .
7843                                         $cgi->a({-href => href(-replay=>1,
7844                                                                hash=>$hash, hash_parent=>'--cc')},
7845                                                 'compact');
7846                         }
7847                         $formats_nav .=
7848                                 ' (merge: ' .
7849                                 join(' ', map {
7850                                         $cgi->a({-href => href(-replay=>1,
7851                                                                hash=>$_, hash_base=>undef)},
7852                                                 esc_html(substr($_, 0, 7)));
7853                                 } @{$co{'parents'}} ) .
7854                                 ')';
7855                 }
7856         }
7857
7858         my $hash_parent_param = $hash_parent;
7859         if (!defined $hash_parent_param) {
7860                 # --cc for multiple parents, --root for parentless
7861                 $hash_parent_param =
7862                         @{$co{'parents'}} > 1 ? '--cc' : $co{'parent'} || '--root';
7863         }
7864
7865         # read commitdiff
7866         my $fd;
7867         my @difftree;
7868         if ($format eq 'html') {
7869                 open $fd, "-|", git_cmd(), "diff-tree", '-r', @diff_opts,
7870                         "--no-commit-id", "--patch-with-raw", "--full-index",
7871                         $hash_parent_param, $hash, "--"
7872                         or die_error(500, "Open git-diff-tree failed");
7873
7874                 while (my $line = <$fd>) {
7875                         chomp $line;
7876                         # empty line ends raw part of diff-tree output
7877                         last unless $line;
7878                         push @difftree, scalar parse_difftree_raw_line($line);
7879                 }
7880
7881         } elsif ($format eq 'plain') {
7882                 open $fd, "-|", git_cmd(), "diff-tree", '-r', @diff_opts,
7883                         '-p', $hash_parent_param, $hash, "--"
7884                         or die_error(500, "Open git-diff-tree failed");
7885         } elsif ($format eq 'patch') {
7886                 # For commit ranges, we limit the output to the number of
7887                 # patches specified in the 'patches' feature.
7888                 # For single commits, we limit the output to a single patch,
7889                 # diverging from the git-format-patch default.
7890                 my @commit_spec = ();
7891                 if ($hash_parent) {
7892                         if ($patch_max > 0) {
7893                                 push @commit_spec, "-$patch_max";
7894                         }
7895                         push @commit_spec, '-n', "$hash_parent..$hash";
7896                 } else {
7897                         if ($params{-single}) {
7898                                 push @commit_spec, '-1';
7899                         } else {
7900                                 if ($patch_max > 0) {
7901                                         push @commit_spec, "-$patch_max";
7902                                 }
7903                                 push @commit_spec, "-n";
7904                         }
7905                         push @commit_spec, '--root', $hash;
7906                 }
7907                 open $fd, "-|", git_cmd(), "format-patch", @diff_opts,
7908                         '--encoding=utf8', '--stdout', @commit_spec
7909                         or die_error(500, "Open git-format-patch failed");
7910         } else {
7911                 die_error(400, "Unknown commitdiff format");
7912         }
7913
7914         # non-textual hash id's can be cached
7915         my $expires;
7916         if ($hash =~ m/^[0-9a-fA-F]{40}$/) {
7917                 $expires = "+1d";
7918         }
7919
7920         # write commit message
7921         if ($format eq 'html') {
7922                 my $refs = git_get_references();
7923                 my $ref = format_ref_marker($refs, $co{'id'});
7924
7925                 git_header_html(undef, $expires);
7926                 git_print_page_nav('commitdiff','', $hash,$co{'tree'},$hash, $formats_nav);
7927                 git_print_header_div('commit', esc_html($co{'title'}) . $ref, $hash);
7928                 print "<div class=\"title_text\">\n" .
7929                       "<table class=\"object_header\">\n";
7930                 git_print_authorship_rows(\%co);
7931                 print "</table>".
7932                       "</div>\n";
7933                 print "<div class=\"page_body\">\n";
7934                 if (@{$co{'comment'}} > 1) {
7935                         print "<div class=\"log\">\n";
7936                         git_print_log($co{'comment'}, -final_empty_line=> 1, -remove_title => 1);
7937                         print "</div>\n"; # class="log"
7938                 }
7939
7940         } elsif ($format eq 'plain') {
7941                 my $refs = git_get_references("tags");
7942                 my $tagname = git_get_rev_name_tags($hash);
7943                 my $filename = basename($project) . "-$hash.patch";
7944
7945                 print $cgi->header(
7946                         -type => 'text/plain',
7947                         -charset => 'utf-8',
7948                         -expires => $expires,
7949                         -content_disposition => 'inline; filename="' . "$filename" . '"');
7950                 my %ad = parse_date($co{'author_epoch'}, $co{'author_tz'});
7951                 print "From: " . to_utf8($co{'author'}) . "\n";
7952                 print "Date: $ad{'rfc2822'} ($ad{'tz_local'})\n";
7953                 print "Subject: " . to_utf8($co{'title'}) . "\n";
7954
7955                 print "X-Git-Tag: $tagname\n" if $tagname;
7956                 print "X-Git-Url: " . $cgi->self_url() . "\n\n";
7957
7958                 foreach my $line (@{$co{'comment'}}) {
7959                         print to_utf8($line) . "\n";
7960                 }
7961                 print "---\n\n";
7962         } elsif ($format eq 'patch') {
7963                 my $filename = basename($project) . "-$hash.patch";
7964
7965                 print $cgi->header(
7966                         -type => 'text/plain',
7967                         -charset => 'utf-8',
7968                         -expires => $expires,
7969                         -content_disposition => 'inline; filename="' . "$filename" . '"');
7970         }
7971
7972         # write patch
7973         if ($format eq 'html') {
7974                 my $use_parents = !defined $hash_parent ||
7975                         $hash_parent eq '-c' || $hash_parent eq '--cc';
7976                 git_difftree_body(\@difftree, $hash,
7977                                   $use_parents ? @{$co{'parents'}} : $hash_parent);
7978                 print "<br/>\n";
7979
7980                 git_patchset_body($fd, $diff_style,
7981                                   \@difftree, $hash,
7982                                   $use_parents ? @{$co{'parents'}} : $hash_parent);
7983                 close $fd;
7984                 print "</div>\n"; # class="page_body"
7985                 git_footer_html();
7986
7987         } elsif ($format eq 'plain') {
7988                 local $/ = undef;
7989                 print <$fd>;
7990                 close $fd
7991                         or print "Reading git-diff-tree failed\n";
7992         } elsif ($format eq 'patch') {
7993                 local $/ = undef;
7994                 print <$fd>;
7995                 close $fd
7996                         or print "Reading git-format-patch failed\n";
7997         }
7998 }
7999
8000 sub git_commitdiff_plain {
8001         git_commitdiff(-format => 'plain');
8002 }
8003
8004 # format-patch-style patches
8005 sub git_patch {
8006         git_commitdiff(-format => 'patch', -single => 1);
8007 }
8008
8009 sub git_patches {
8010         git_commitdiff(-format => 'patch');
8011 }
8012
8013 sub git_history {
8014         git_log_generic('history', \&git_history_body,
8015                         $hash_base, $hash_parent_base,
8016                         $file_name, $hash);
8017 }
8018
8019 sub git_search {
8020         $searchtype ||= 'commit';
8021
8022         # check if appropriate features are enabled
8023         gitweb_check_feature('search')
8024                 or die_error(403, "Search is disabled");
8025         if ($searchtype eq 'pickaxe') {
8026                 # pickaxe may take all resources of your box and run for several minutes
8027                 # with every query - so decide by yourself how public you make this feature
8028                 gitweb_check_feature('pickaxe')
8029                         or die_error(403, "Pickaxe search is disabled");
8030         }
8031         if ($searchtype eq 'grep') {
8032                 # grep search might be potentially CPU-intensive, too
8033                 gitweb_check_feature('grep')
8034                         or die_error(403, "Grep search is disabled");
8035         }
8036
8037         if (!defined $searchtext) {
8038                 die_error(400, "Text field is empty");
8039         }
8040         if (!defined $hash) {
8041                 $hash = git_get_head_hash($project);
8042         }
8043         my %co = parse_commit($hash);
8044         if (!%co) {
8045                 die_error(404, "Unknown commit object");
8046         }
8047         if (!defined $page) {
8048                 $page = 0;
8049         }
8050
8051         if ($searchtype eq 'commit' ||
8052             $searchtype eq 'author' ||
8053             $searchtype eq 'committer') {
8054                 git_search_message(%co);
8055         } elsif ($searchtype eq 'pickaxe') {
8056                 git_search_changes(%co);
8057         } elsif ($searchtype eq 'grep') {
8058                 git_search_files(%co);
8059         } else {
8060                 die_error(400, "Unknown search type");
8061         }
8062 }
8063
8064 sub git_search_help {
8065         git_header_html();
8066         git_print_page_nav('','', $hash,$hash,$hash);
8067         print <<EOT;
8068 <p><strong>Pattern</strong> is by default a normal string that is matched precisely (but without
8069 regard to case, except in the case of pickaxe). However, when you check the <em>re</em> checkbox,
8070 the pattern entered is recognized as the POSIX extended
8071 <a href="http://en.wikipedia.org/wiki/Regular_expression">regular expression</a> (also case
8072 insensitive).</p>
8073 <dl>
8074 <dt><b>commit</b></dt>
8075 <dd>The commit messages and authorship information will be scanned for the given pattern.</dd>
8076 EOT
8077         my $have_grep = gitweb_check_feature('grep');
8078         if ($have_grep) {
8079                 print <<EOT;
8080 <dt><b>grep</b></dt>
8081 <dd>All files in the currently selected tree (HEAD unless you are explicitly browsing
8082     a different one) are searched for the given pattern. On large trees, this search can take
8083 a while and put some strain on the server, so please use it with some consideration. Note that
8084 due to git-grep peculiarity, currently if regexp mode is turned off, the matches are
8085 case-sensitive.</dd>
8086 EOT
8087         }
8088         print <<EOT;
8089 <dt><b>author</b></dt>
8090 <dd>Name and e-mail of the change author and date of birth of the patch will be scanned for the given pattern.</dd>
8091 <dt><b>committer</b></dt>
8092 <dd>Name and e-mail of the committer and date of commit will be scanned for the given pattern.</dd>
8093 EOT
8094         my $have_pickaxe = gitweb_check_feature('pickaxe');
8095         if ($have_pickaxe) {
8096                 print <<EOT;
8097 <dt><b>pickaxe</b></dt>
8098 <dd>All commits that caused the string to appear or disappear from any file (changes that
8099 added, removed or "modified" the string) will be listed. This search can take a while and
8100 takes a lot of strain on the server, so please use it wisely. Note that since you may be
8101 interested even in changes just changing the case as well, this search is case sensitive.</dd>
8102 EOT
8103         }
8104         print "</dl>\n";
8105         git_footer_html();
8106 }
8107
8108 sub git_shortlog {
8109         git_log_generic('shortlog', \&git_shortlog_body,
8110                         $hash, $hash_parent);
8111 }
8112
8113 ## ......................................................................
8114 ## feeds (RSS, Atom; OPML)
8115
8116 sub git_feed {
8117         my $format = shift || 'atom';
8118         my $have_blame = gitweb_check_feature('blame');
8119
8120         # Atom: http://www.atomenabled.org/developers/syndication/
8121         # RSS:  http://www.notestips.com/80256B3A007F2692/1/NAMO5P9UPQ
8122         if ($format ne 'rss' && $format ne 'atom') {
8123                 die_error(400, "Unknown web feed format");
8124         }
8125
8126         # log/feed of current (HEAD) branch, log of given branch, history of file/directory
8127         my $head = $hash || 'HEAD';
8128         my @commitlist = parse_commits($head, 150, 0, $file_name);
8129
8130         my %latest_commit;
8131         my %latest_date;
8132         my $content_type = "application/$format+xml";
8133         if (defined $cgi->http('HTTP_ACCEPT') &&
8134                  $cgi->Accept('text/xml') > $cgi->Accept($content_type)) {
8135                 # browser (feed reader) prefers text/xml
8136                 $content_type = 'text/xml';
8137         }
8138         if (defined($commitlist[0])) {
8139                 %latest_commit = %{$commitlist[0]};
8140                 my $latest_epoch = $latest_commit{'committer_epoch'};
8141                 exit_if_unmodified_since($latest_epoch);
8142                 %latest_date = parse_date($latest_epoch, $latest_commit{'committer_tz'});
8143         }
8144         print $cgi->header(
8145                 -type => $content_type,
8146                 -charset => 'utf-8',
8147                 %latest_date ? (-last_modified => $latest_date{'rfc2822'}) : (),
8148                 -status => '200 OK');
8149
8150         # Optimization: skip generating the body if client asks only
8151         # for Last-Modified date.
8152         return if ($cgi->request_method() eq 'HEAD');
8153
8154         # header variables
8155         my $title = "$site_name - $project/$action";
8156         my $feed_type = 'log';
8157         if (defined $hash) {
8158                 $title .= " - '$hash'";
8159                 $feed_type = 'branch log';
8160                 if (defined $file_name) {
8161                         $title .= " :: $file_name";
8162                         $feed_type = 'history';
8163                 }
8164         } elsif (defined $file_name) {
8165                 $title .= " - $file_name";
8166                 $feed_type = 'history';
8167         }
8168         $title .= " $feed_type";
8169         $title = esc_html($title);
8170         my $descr = git_get_project_description($project);
8171         if (defined $descr) {
8172                 $descr = esc_html($descr);
8173         } else {
8174                 $descr = "$project " .
8175                          ($format eq 'rss' ? 'RSS' : 'Atom') .
8176                          " feed";
8177         }
8178         my $owner = git_get_project_owner($project);
8179         $owner = esc_html($owner);
8180
8181         #header
8182         my $alt_url;
8183         if (defined $file_name) {
8184                 $alt_url = href(-full=>1, action=>"history", hash=>$hash, file_name=>$file_name);
8185         } elsif (defined $hash) {
8186                 $alt_url = href(-full=>1, action=>"log", hash=>$hash);
8187         } else {
8188                 $alt_url = href(-full=>1, action=>"summary");
8189         }
8190         print qq!<?xml version="1.0" encoding="utf-8"?>\n!;
8191         if ($format eq 'rss') {
8192                 print <<XML;
8193 <rss version="2.0" xmlns:content="http://purl.org/rss/1.0/modules/content/">
8194 <channel>
8195 XML
8196                 print "<title>$title</title>\n" .
8197                       "<link>$alt_url</link>\n" .
8198                       "<description>$descr</description>\n" .
8199                       "<language>en</language>\n" .
8200                       # project owner is responsible for 'editorial' content
8201                       "<managingEditor>$owner</managingEditor>\n";
8202                 if (defined $logo || defined $favicon) {
8203                         # prefer the logo to the favicon, since RSS
8204                         # doesn't allow both
8205                         my $img = esc_url($logo || $favicon);
8206                         print "<image>\n" .
8207                               "<url>$img</url>\n" .
8208                               "<title>$title</title>\n" .
8209                               "<link>$alt_url</link>\n" .
8210                               "</image>\n";
8211                 }
8212                 if (%latest_date) {
8213                         print "<pubDate>$latest_date{'rfc2822'}</pubDate>\n";
8214                         print "<lastBuildDate>$latest_date{'rfc2822'}</lastBuildDate>\n";
8215                 }
8216                 print "<generator>gitweb v.$version/$git_version</generator>\n";
8217         } elsif ($format eq 'atom') {
8218                 print <<XML;
8219 <feed xmlns="http://www.w3.org/2005/Atom">
8220 XML
8221                 print "<title>$title</title>\n" .
8222                       "<subtitle>$descr</subtitle>\n" .
8223                       '<link rel="alternate" type="text/html" href="' .
8224                       $alt_url . '" />' . "\n" .
8225                       '<link rel="self" type="' . $content_type . '" href="' .
8226                       $cgi->self_url() . '" />' . "\n" .
8227                       "<id>" . href(-full=>1) . "</id>\n" .
8228                       # use project owner for feed author
8229                       "<author><name>$owner</name></author>\n";
8230                 if (defined $favicon) {
8231                         print "<icon>" . esc_url($favicon) . "</icon>\n";
8232                 }
8233                 if (defined $logo) {
8234                         # not twice as wide as tall: 72 x 27 pixels
8235                         print "<logo>" . esc_url($logo) . "</logo>\n";
8236                 }
8237                 if (! %latest_date) {
8238                         # dummy date to keep the feed valid until commits trickle in:
8239                         print "<updated>1970-01-01T00:00:00Z</updated>\n";
8240                 } else {
8241                         print "<updated>$latest_date{'iso-8601'}</updated>\n";
8242                 }
8243                 print "<generator version='$version/$git_version'>gitweb</generator>\n";
8244         }
8245
8246         # contents
8247         for (my $i = 0; $i <= $#commitlist; $i++) {
8248                 my %co = %{$commitlist[$i]};
8249                 my $commit = $co{'id'};
8250                 # we read 150, we always show 30 and the ones more recent than 48 hours
8251                 if (($i >= 20) && ((time - $co{'author_epoch'}) > 48*60*60)) {
8252                         last;
8253                 }
8254                 my %cd = parse_date($co{'author_epoch'}, $co{'author_tz'});
8255
8256                 # get list of changed files
8257                 open my $fd, "-|", git_cmd(), "diff-tree", '-r', @diff_opts,
8258                         $co{'parent'} || "--root",
8259                         $co{'id'}, "--", (defined $file_name ? $file_name : ())
8260                         or next;
8261                 my @difftree = map { chomp; $_ } <$fd>;
8262                 close $fd
8263                         or next;
8264
8265                 # print element (entry, item)
8266                 my $co_url = href(-full=>1, action=>"commitdiff", hash=>$commit);
8267                 if ($format eq 'rss') {
8268                         print "<item>\n" .
8269                               "<title>" . esc_html($co{'title'}) . "</title>\n" .
8270                               "<author>" . esc_html($co{'author'}) . "</author>\n" .
8271                               "<pubDate>$cd{'rfc2822'}</pubDate>\n" .
8272                               "<guid isPermaLink=\"true\">$co_url</guid>\n" .
8273                               "<link>$co_url</link>\n" .
8274                               "<description>" . esc_html($co{'title'}) . "</description>\n" .
8275                               "<content:encoded>" .
8276                               "<![CDATA[\n";
8277                 } elsif ($format eq 'atom') {
8278                         print "<entry>\n" .
8279                               "<title type=\"html\">" . esc_html($co{'title'}) . "</title>\n" .
8280                               "<updated>$cd{'iso-8601'}</updated>\n" .
8281                               "<author>\n" .
8282                               "  <name>" . esc_html($co{'author_name'}) . "</name>\n";
8283                         if ($co{'author_email'}) {
8284                                 print "  <email>" . esc_html($co{'author_email'}) . "</email>\n";
8285                         }
8286                         print "</author>\n" .
8287                               # use committer for contributor
8288                               "<contributor>\n" .
8289                               "  <name>" . esc_html($co{'committer_name'}) . "</name>\n";
8290                         if ($co{'committer_email'}) {
8291                                 print "  <email>" . esc_html($co{'committer_email'}) . "</email>\n";
8292                         }
8293                         print "</contributor>\n" .
8294                               "<published>$cd{'iso-8601'}</published>\n" .
8295                               "<link rel=\"alternate\" type=\"text/html\" href=\"$co_url\" />\n" .
8296                               "<id>$co_url</id>\n" .
8297                               "<content type=\"xhtml\" xml:base=\"" . esc_url($my_url) . "\">\n" .
8298                               "<div xmlns=\"http://www.w3.org/1999/xhtml\">\n";
8299                 }
8300                 my $comment = $co{'comment'};
8301                 print "<pre>\n";
8302                 foreach my $line (@$comment) {
8303                         $line = esc_html($line);
8304                         print "$line\n";
8305                 }
8306                 print "</pre><ul>\n";
8307                 foreach my $difftree_line (@difftree) {
8308                         my %difftree = parse_difftree_raw_line($difftree_line);
8309                         next if !$difftree{'from_id'};
8310
8311                         my $file = $difftree{'file'} || $difftree{'to_file'};
8312
8313                         print "<li>" .
8314                               "[" .
8315                               $cgi->a({-href => href(-full=>1, action=>"blobdiff",
8316                                                      hash=>$difftree{'to_id'}, hash_parent=>$difftree{'from_id'},
8317                                                      hash_base=>$co{'id'}, hash_parent_base=>$co{'parent'},
8318                                                      file_name=>$file, file_parent=>$difftree{'from_file'}),
8319                                       -title => "diff"}, 'D');
8320                         if ($have_blame) {
8321                                 print $cgi->a({-href => href(-full=>1, action=>"blame",
8322                                                              file_name=>$file, hash_base=>$commit),
8323                                               -title => "blame"}, 'B');
8324                         }
8325                         # if this is not a feed of a file history
8326                         if (!defined $file_name || $file_name ne $file) {
8327                                 print $cgi->a({-href => href(-full=>1, action=>"history",
8328                                                              file_name=>$file, hash=>$commit),
8329                                               -title => "history"}, 'H');
8330                         }
8331                         $file = esc_path($file);
8332                         print "] ".
8333                               "$file</li>\n";
8334                 }
8335                 if ($format eq 'rss') {
8336                         print "</ul>]]>\n" .
8337                               "</content:encoded>\n" .
8338                               "</item>\n";
8339                 } elsif ($format eq 'atom') {
8340                         print "</ul>\n</div>\n" .
8341                               "</content>\n" .
8342                               "</entry>\n";
8343                 }
8344         }
8345
8346         # end of feed
8347         if ($format eq 'rss') {
8348                 print "</channel>\n</rss>\n";
8349         } elsif ($format eq 'atom') {
8350                 print "</feed>\n";
8351         }
8352 }
8353
8354 sub git_rss {
8355         git_feed('rss');
8356 }
8357
8358 sub git_atom {
8359         git_feed('atom');
8360 }
8361
8362 sub git_opml {
8363         my @list = git_get_projects_list($project_filter, $strict_export);
8364         if (!@list) {
8365                 die_error(404, "No projects found");
8366         }
8367
8368         print $cgi->header(
8369                 -type => 'text/xml',
8370                 -charset => 'utf-8',
8371                 -content_disposition => 'inline; filename="opml.xml"');
8372
8373         my $title = esc_html($site_name);
8374         my $filter = " within subdirectory ";
8375         if (defined $project_filter) {
8376                 $filter .= esc_html($project_filter);
8377         } else {
8378                 $filter = "";
8379         }
8380         print <<XML;
8381 <?xml version="1.0" encoding="utf-8"?>
8382 <opml version="1.0">
8383 <head>
8384   <title>$title OPML Export$filter</title>
8385 </head>
8386 <body>
8387 <outline text="git RSS feeds">
8388 XML
8389
8390         foreach my $pr (@list) {
8391                 my %proj = %$pr;
8392                 my $head = git_get_head_hash($proj{'path'});
8393                 if (!defined $head) {
8394                         next;
8395                 }
8396                 $git_dir = "$projectroot/$proj{'path'}";
8397                 my %co = parse_commit($head);
8398                 if (!%co) {
8399                         next;
8400                 }
8401
8402                 my $path = esc_html(chop_str($proj{'path'}, 25, 5));
8403                 my $rss  = href('project' => $proj{'path'}, 'action' => 'rss', -full => 1);
8404                 my $html = href('project' => $proj{'path'}, 'action' => 'summary', -full => 1);
8405                 print "<outline type=\"rss\" text=\"$path\" title=\"$path\" xmlUrl=\"$rss\" htmlUrl=\"$html\"/>\n";
8406         }
8407         print <<XML;
8408 </outline>
8409 </body>
8410 </opml>
8411 XML
8412 }