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                                 my $s = $nforks == 1 ? '' : 's';
5701                                 if ($nforks > 0) {
5702                                         print $cgi->a({-href => href(project=>$pr->{'path'}, action=>"forks"),
5703                                                        -title => "$nforks fork$s"}, "+");
5704                                 } else {
5705                                         print $cgi->span({-title => "$nforks fork$s"}, "+");
5706                                 }
5707                         }
5708                         print "</td>\n";
5709                 }
5710                 print "<td>" . $cgi->a({-href => href(project=>$pr->{'path'}, action=>"summary"),
5711                                         -class => "list"},
5712                                        esc_html_match_hl($pr->{'path'}, $search_regexp)) .
5713                       "</td>\n" .
5714                       "<td>" . $cgi->a({-href => href(project=>$pr->{'path'}, action=>"summary"),
5715                                         -class => "list",
5716                                         -title => $pr->{'descr_long'}},
5717                                         $search_regexp
5718                                         ? esc_html_match_hl_chopped($pr->{'descr_long'},
5719                                                                     $pr->{'descr'}, $search_regexp)
5720                                         : esc_html($pr->{'descr'})) .
5721                       "</td>\n";
5722                 unless ($omit_owner) {
5723                         print "<td><i>" . chop_and_escape_str($pr->{'owner'}, 15) . "</i></td>\n";
5724                 }
5725                 unless ($omit_age_column) {
5726                         print "<td class=\"". age_class($pr->{'age'}) . "\">" .
5727                             (defined $pr->{'age_string'} ? $pr->{'age_string'} : "No commits") . "</td>\n";
5728                 }
5729                 print"<td class=\"link\">" .
5730                       $cgi->a({-href => href(project=>$pr->{'path'}, action=>"summary")}, "summary")   . " | " .
5731                       $cgi->a({-href => href(project=>$pr->{'path'}, action=>"shortlog")}, "shortlog") . " | " .
5732                       $cgi->a({-href => href(project=>$pr->{'path'}, action=>"log")}, "log") . " | " .
5733                       $cgi->a({-href => href(project=>$pr->{'path'}, action=>"tree")}, "tree") .
5734                       ($pr->{'forks'} ? " | " . $cgi->a({-href => href(project=>$pr->{'path'}, action=>"forks")}, "forks") : '') .
5735                       "</td>\n" .
5736                       "</tr>\n";
5737         }
5738 }
5739
5740 sub git_project_list_body {
5741         # actually uses global variable $project
5742         my ($projlist, $order, $from, $to, $extra, $no_header) = @_;
5743         my @projects = @$projlist;
5744
5745         my $check_forks = gitweb_check_feature('forks');
5746         my $show_ctags  = gitweb_check_feature('ctags');
5747         my $tagfilter = $show_ctags ? $input_params{'ctag'} : undef;
5748         $check_forks = undef
5749                 if ($tagfilter || $search_regexp);
5750
5751         # filtering out forks before filling info allows to do less work
5752         @projects = filter_forks_from_projects_list(\@projects)
5753                 if ($check_forks);
5754         # search_projects_list pre-fills required info
5755         @projects = search_projects_list(\@projects,
5756                                          'search_regexp' => $search_regexp,
5757                                          'tagfilter'  => $tagfilter)
5758                 if ($tagfilter || $search_regexp);
5759         # fill the rest
5760         my @all_fields = ('descr', 'descr_long', 'ctags', 'category');
5761         push @all_fields, ('age', 'age_string') unless($omit_age_column);
5762         push @all_fields, 'owner' unless($omit_owner);
5763         @projects = fill_project_list_info(\@projects, @all_fields);
5764
5765         $order ||= $default_projects_order;
5766         $from = 0 unless defined $from;
5767         $to = $#projects if (!defined $to || $#projects < $to);
5768
5769         # short circuit
5770         if ($from > $to) {
5771                 print "<center>\n".
5772                       "<b>No such projects found</b><br />\n".
5773                       "Click ".$cgi->a({-href=>href(project=>undef)},"here")." to view all projects<br />\n".
5774                       "</center>\n<br />\n";
5775                 return;
5776         }
5777
5778         @projects = sort_projects_list(\@projects, $order);
5779
5780         if ($show_ctags) {
5781                 my $ctags = git_gather_all_ctags(\@projects);
5782                 my $cloud = git_populate_project_tagcloud($ctags);
5783                 print git_show_project_tagcloud($cloud, 64);
5784         }
5785
5786         print "<table class=\"project_list\">\n";
5787         unless ($no_header) {
5788                 print "<tr>\n";
5789                 if ($check_forks) {
5790                         print "<th></th>\n";
5791                 }
5792                 print_sort_th('project', $order, 'Project');
5793                 print_sort_th('descr', $order, 'Description');
5794                 print_sort_th('owner', $order, 'Owner') unless $omit_owner;
5795                 print_sort_th('age', $order, 'Last Change') unless $omit_age_column;
5796                 print "<th></th>\n" . # for links
5797                       "</tr>\n";
5798         }
5799
5800         if ($projects_list_group_categories) {
5801                 # only display categories with projects in the $from-$to window
5802                 @projects = sort {$a->{'category'} cmp $b->{'category'}} @projects[$from..$to];
5803                 my %categories = build_projlist_by_category(\@projects, $from, $to);
5804                 foreach my $cat (sort keys %categories) {
5805                         unless ($cat eq "") {
5806                                 print "<tr>\n";
5807                                 if ($check_forks) {
5808                                         print "<td></td>\n";
5809                                 }
5810                                 print "<td class=\"category\" colspan=\"5\">".esc_html($cat)."</td>\n";
5811                                 print "</tr>\n";
5812                         }
5813
5814                         git_project_list_rows($categories{$cat}, undef, undef, $check_forks);
5815                 }
5816         } else {
5817                 git_project_list_rows(\@projects, $from, $to, $check_forks);
5818         }
5819
5820         if (defined $extra) {
5821                 print "<tr>\n";
5822                 if ($check_forks) {
5823                         print "<td></td>\n";
5824                 }
5825                 print "<td colspan=\"5\">$extra</td>\n" .
5826                       "</tr>\n";
5827         }
5828         print "</table>\n";
5829 }
5830
5831 sub git_log_body {
5832         # uses global variable $project
5833         my ($commitlist, $from, $to, $refs, $extra) = @_;
5834
5835         $from = 0 unless defined $from;
5836         $to = $#{$commitlist} if (!defined $to || $#{$commitlist} < $to);
5837
5838         for (my $i = 0; $i <= $to; $i++) {
5839                 my %co = %{$commitlist->[$i]};
5840                 next if !%co;
5841                 my $commit = $co{'id'};
5842                 my $ref = format_ref_marker($refs, $commit);
5843                 git_print_header_div('commit',
5844                                "<span class=\"age\">$co{'age_string'}</span>" .
5845                                esc_html($co{'title'}) . $ref,
5846                                $commit);
5847                 print "<div class=\"title_text\">\n" .
5848                       "<div class=\"log_link\">\n" .
5849                       $cgi->a({-href => href(action=>"commit", hash=>$commit)}, "commit") .
5850                       " | " .
5851                       $cgi->a({-href => href(action=>"commitdiff", hash=>$commit)}, "commitdiff") .
5852                       " | " .
5853                       $cgi->a({-href => href(action=>"tree", hash=>$commit, hash_base=>$commit)}, "tree") .
5854                       "<br/>\n" .
5855                       "</div>\n";
5856                       git_print_authorship(\%co, -tag => 'span');
5857                       print "<br/>\n</div>\n";
5858
5859                 print "<div class=\"log_body\">\n";
5860                 git_print_log($co{'comment'}, -final_empty_line=> 1);
5861                 print "</div>\n";
5862         }
5863         if ($extra) {
5864                 print "<div class=\"page_nav\">\n";
5865                 print "$extra\n";
5866                 print "</div>\n";
5867         }
5868 }
5869
5870 sub git_shortlog_body {
5871         # uses global variable $project
5872         my ($commitlist, $from, $to, $refs, $extra) = @_;
5873
5874         $from = 0 unless defined $from;
5875         $to = $#{$commitlist} if (!defined $to || $#{$commitlist} < $to);
5876
5877         print "<table class=\"shortlog\">\n";
5878         my $alternate = 1;
5879         for (my $i = $from; $i <= $to; $i++) {
5880                 my %co = %{$commitlist->[$i]};
5881                 my $commit = $co{'id'};
5882                 my $ref = format_ref_marker($refs, $commit);
5883                 if ($alternate) {
5884                         print "<tr class=\"dark\">\n";
5885                 } else {
5886                         print "<tr class=\"light\">\n";
5887                 }
5888                 $alternate ^= 1;
5889                 # git_summary() used print "<td><i>$co{'age_string'}</i></td>\n" .
5890                 print "<td title=\"$co{'age_string_age'}\"><i>$co{'age_string_date'}</i></td>\n" .
5891                       format_author_html('td', \%co, 10) . "<td>";
5892                 print format_subject_html($co{'title'}, $co{'title_short'},
5893                                           href(action=>"commit", hash=>$commit), $ref);
5894                 print "</td>\n" .
5895                       "<td class=\"link\">" .
5896                       $cgi->a({-href => href(action=>"commit", hash=>$commit)}, "commit") . " | " .
5897                       $cgi->a({-href => href(action=>"commitdiff", hash=>$commit)}, "commitdiff") . " | " .
5898                       $cgi->a({-href => href(action=>"tree", hash=>$commit, hash_base=>$commit)}, "tree");
5899                 my $snapshot_links = format_snapshot_links($commit);
5900                 if (defined $snapshot_links) {
5901                         print " | " . $snapshot_links;
5902                 }
5903                 print "</td>\n" .
5904                       "</tr>\n";
5905         }
5906         if (defined $extra) {
5907                 print "<tr>\n" .
5908                       "<td colspan=\"4\">$extra</td>\n" .
5909                       "</tr>\n";
5910         }
5911         print "</table>\n";
5912 }
5913
5914 sub git_history_body {
5915         # Warning: assumes constant type (blob or tree) during history
5916         my ($commitlist, $from, $to, $refs, $extra,
5917             $file_name, $file_hash, $ftype) = @_;
5918
5919         $from = 0 unless defined $from;
5920         $to = $#{$commitlist} unless (defined $to && $to <= $#{$commitlist});
5921
5922         print "<table class=\"history\">\n";
5923         my $alternate = 1;
5924         for (my $i = $from; $i <= $to; $i++) {
5925                 my %co = %{$commitlist->[$i]};
5926                 if (!%co) {
5927                         next;
5928                 }
5929                 my $commit = $co{'id'};
5930
5931                 my $ref = format_ref_marker($refs, $commit);
5932
5933                 if ($alternate) {
5934                         print "<tr class=\"dark\">\n";
5935                 } else {
5936                         print "<tr class=\"light\">\n";
5937                 }
5938                 $alternate ^= 1;
5939                 print "<td title=\"$co{'age_string_age'}\"><i>$co{'age_string_date'}</i></td>\n" .
5940         # shortlog:   format_author_html('td', \%co, 10)
5941                       format_author_html('td', \%co, 15, 3) . "<td>";
5942                 # originally git_history used chop_str($co{'title'}, 50)
5943                 print format_subject_html($co{'title'}, $co{'title_short'},
5944                                           href(action=>"commit", hash=>$commit), $ref);
5945                 print "</td>\n" .
5946                       "<td class=\"link\">" .
5947                       $cgi->a({-href => href(action=>$ftype, hash_base=>$commit, file_name=>$file_name)}, $ftype) . " | " .
5948                       $cgi->a({-href => href(action=>"commitdiff", hash=>$commit)}, "commitdiff");
5949
5950                 if ($ftype eq 'blob') {
5951                         my $blob_current = $file_hash;
5952                         my $blob_parent  = git_get_hash_by_path($commit, $file_name);
5953                         if (defined $blob_current && defined $blob_parent &&
5954                                         $blob_current ne $blob_parent) {
5955                                 print " | " .
5956                                         $cgi->a({-href => href(action=>"blobdiff",
5957                                                                hash=>$blob_current, hash_parent=>$blob_parent,
5958                                                                hash_base=>$hash_base, hash_parent_base=>$commit,
5959                                                                file_name=>$file_name)},
5960                                                 "diff to current");
5961                         }
5962                 }
5963                 print "</td>\n" .
5964                       "</tr>\n";
5965         }
5966         if (defined $extra) {
5967                 print "<tr>\n" .
5968                       "<td colspan=\"4\">$extra</td>\n" .
5969                       "</tr>\n";
5970         }
5971         print "</table>\n";
5972 }
5973
5974 sub git_tags_body {
5975         # uses global variable $project
5976         my ($taglist, $from, $to, $extra) = @_;
5977         $from = 0 unless defined $from;
5978         $to = $#{$taglist} if (!defined $to || $#{$taglist} < $to);
5979
5980         print "<table class=\"tags\">\n";
5981         my $alternate = 1;
5982         for (my $i = $from; $i <= $to; $i++) {
5983                 my $entry = $taglist->[$i];
5984                 my %tag = %$entry;
5985                 my $comment = $tag{'subject'};
5986                 my $comment_short;
5987                 if (defined $comment) {
5988                         $comment_short = chop_str($comment, 30, 5);
5989                 }
5990                 if ($alternate) {
5991                         print "<tr class=\"dark\">\n";
5992                 } else {
5993                         print "<tr class=\"light\">\n";
5994                 }
5995                 $alternate ^= 1;
5996                 if (defined $tag{'age'}) {
5997                         print "<td><i>$tag{'age'}</i></td>\n";
5998                 } else {
5999                         print "<td></td>\n";
6000                 }
6001                 print "<td>" .
6002                       $cgi->a({-href => href(action=>$tag{'reftype'}, hash=>$tag{'refid'}),
6003                                -class => "list name"}, esc_html($tag{'name'})) .
6004                       "</td>\n" .
6005                       "<td>";
6006                 if (defined $comment) {
6007                         print format_subject_html($comment, $comment_short,
6008                                                   href(action=>"tag", hash=>$tag{'id'}));
6009                 }
6010                 print "</td>\n" .
6011                       "<td class=\"selflink\">";
6012                 if ($tag{'type'} eq "tag") {
6013                         print $cgi->a({-href => href(action=>"tag", hash=>$tag{'id'})}, "tag");
6014                 } else {
6015                         print "&nbsp;";
6016                 }
6017                 print "</td>\n" .
6018                       "<td class=\"link\">" . " | " .
6019                       $cgi->a({-href => href(action=>$tag{'reftype'}, hash=>$tag{'refid'})}, $tag{'reftype'});
6020                 if ($tag{'reftype'} eq "commit") {
6021                         print " | " . $cgi->a({-href => href(action=>"shortlog", hash=>$tag{'fullname'})}, "shortlog") .
6022                               " | " . $cgi->a({-href => href(action=>"log", hash=>$tag{'fullname'})}, "log");
6023                 } elsif ($tag{'reftype'} eq "blob") {
6024                         print " | " . $cgi->a({-href => href(action=>"blob_plain", hash=>$tag{'refid'})}, "raw");
6025                 }
6026                 print "</td>\n" .
6027                       "</tr>";
6028         }
6029         if (defined $extra) {
6030                 print "<tr>\n" .
6031                       "<td colspan=\"5\">$extra</td>\n" .
6032                       "</tr>\n";
6033         }
6034         print "</table>\n";
6035 }
6036
6037 sub git_heads_body {
6038         # uses global variable $project
6039         my ($headlist, $head_at, $from, $to, $extra) = @_;
6040         $from = 0 unless defined $from;
6041         $to = $#{$headlist} if (!defined $to || $#{$headlist} < $to);
6042
6043         print "<table class=\"heads\">\n";
6044         my $alternate = 1;
6045         for (my $i = $from; $i <= $to; $i++) {
6046                 my $entry = $headlist->[$i];
6047                 my %ref = %$entry;
6048                 my $curr = defined $head_at && $ref{'id'} eq $head_at;
6049                 if ($alternate) {
6050                         print "<tr class=\"dark\">\n";
6051                 } else {
6052                         print "<tr class=\"light\">\n";
6053                 }
6054                 $alternate ^= 1;
6055                 print "<td><i>$ref{'age'}</i></td>\n" .
6056                       ($curr ? "<td class=\"current_head\">" : "<td>") .
6057                       $cgi->a({-href => href(action=>"shortlog", hash=>$ref{'fullname'}),
6058                                -class => "list name"},esc_html($ref{'name'})) .
6059                       "</td>\n" .
6060                       "<td class=\"link\">" .
6061                       $cgi->a({-href => href(action=>"shortlog", hash=>$ref{'fullname'})}, "shortlog") . " | " .
6062                       $cgi->a({-href => href(action=>"log", hash=>$ref{'fullname'})}, "log") . " | " .
6063                       $cgi->a({-href => href(action=>"tree", hash=>$ref{'fullname'}, hash_base=>$ref{'fullname'})}, "tree") .
6064                       "</td>\n" .
6065                       "</tr>";
6066         }
6067         if (defined $extra) {
6068                 print "<tr>\n" .
6069                       "<td colspan=\"3\">$extra</td>\n" .
6070                       "</tr>\n";
6071         }
6072         print "</table>\n";
6073 }
6074
6075 # Display a single remote block
6076 sub git_remote_block {
6077         my ($remote, $rdata, $limit, $head) = @_;
6078
6079         my $heads = $rdata->{'heads'};
6080         my $fetch = $rdata->{'fetch'};
6081         my $push = $rdata->{'push'};
6082
6083         my $urls_table = "<table class=\"projects_list\">\n" ;
6084
6085         if (defined $fetch) {
6086                 if ($fetch eq $push) {
6087                         $urls_table .= format_repo_url("URL", $fetch);
6088                 } else {
6089                         $urls_table .= format_repo_url("Fetch URL", $fetch);
6090                         $urls_table .= format_repo_url("Push URL", $push) if defined $push;
6091                 }
6092         } elsif (defined $push) {
6093                 $urls_table .= format_repo_url("Push URL", $push);
6094         } else {
6095                 $urls_table .= format_repo_url("", "No remote URL");
6096         }
6097
6098         $urls_table .= "</table>\n";
6099
6100         my $dots;
6101         if (defined $limit && $limit < @$heads) {
6102                 $dots = $cgi->a({-href => href(action=>"remotes", hash=>$remote)}, "...");
6103         }
6104
6105         print $urls_table;
6106         git_heads_body($heads, $head, 0, $limit, $dots);
6107 }
6108
6109 # Display a list of remote names with the respective fetch and push URLs
6110 sub git_remotes_list {
6111         my ($remotedata, $limit) = @_;
6112         print "<table class=\"heads\">\n";
6113         my $alternate = 1;
6114         my @remotes = sort keys %$remotedata;
6115
6116         my $limited = $limit && $limit < @remotes;
6117
6118         $#remotes = $limit - 1 if $limited;
6119
6120         while (my $remote = shift @remotes) {
6121                 my $rdata = $remotedata->{$remote};
6122                 my $fetch = $rdata->{'fetch'};
6123                 my $push = $rdata->{'push'};
6124                 if ($alternate) {
6125                         print "<tr class=\"dark\">\n";
6126                 } else {
6127                         print "<tr class=\"light\">\n";
6128                 }
6129                 $alternate ^= 1;
6130                 print "<td>" .
6131                       $cgi->a({-href=> href(action=>'remotes', hash=>$remote),
6132                                -class=> "list name"},esc_html($remote)) .
6133                       "</td>";
6134                 print "<td class=\"link\">" .
6135                       (defined $fetch ? $cgi->a({-href=> $fetch}, "fetch") : "fetch") .
6136                       " | " .
6137                       (defined $push ? $cgi->a({-href=> $push}, "push") : "push") .
6138                       "</td>";
6139
6140                 print "</tr>\n";
6141         }
6142
6143         if ($limited) {
6144                 print "<tr>\n" .
6145                       "<td colspan=\"3\">" .
6146                       $cgi->a({-href => href(action=>"remotes")}, "...") .
6147                       "</td>\n" . "</tr>\n";
6148         }
6149
6150         print "</table>";
6151 }
6152
6153 # Display remote heads grouped by remote, unless there are too many
6154 # remotes, in which case we only display the remote names
6155 sub git_remotes_body {
6156         my ($remotedata, $limit, $head) = @_;
6157         if ($limit and $limit < keys %$remotedata) {
6158                 git_remotes_list($remotedata, $limit);
6159         } else {
6160                 fill_remote_heads($remotedata);
6161                 while (my ($remote, $rdata) = each %$remotedata) {
6162                         git_print_section({-class=>"remote", -id=>$remote},
6163                                 ["remotes", $remote, $remote], sub {
6164                                         git_remote_block($remote, $rdata, $limit, $head);
6165                                 });
6166                 }
6167         }
6168 }
6169
6170 sub git_search_message {
6171         my %co = @_;
6172
6173         my $greptype;
6174         if ($searchtype eq 'commit') {
6175                 $greptype = "--grep=";
6176         } elsif ($searchtype eq 'author') {
6177                 $greptype = "--author=";
6178         } elsif ($searchtype eq 'committer') {
6179                 $greptype = "--committer=";
6180         }
6181         $greptype .= $searchtext;
6182         my @commitlist = parse_commits($hash, 101, (100 * $page), undef,
6183                                        $greptype, '--regexp-ignore-case',
6184                                        $search_use_regexp ? '--extended-regexp' : '--fixed-strings');
6185
6186         my $paging_nav = '';
6187         if ($page > 0) {
6188                 $paging_nav .=
6189                         $cgi->a({-href => href(-replay=>1, page=>undef)},
6190                                 "first") .
6191                         " &sdot; " .
6192                         $cgi->a({-href => href(-replay=>1, page=>$page-1),
6193                                  -accesskey => "p", -title => "Alt-p"}, "prev");
6194         } else {
6195                 $paging_nav .= "first &sdot; prev";
6196         }
6197         my $next_link = '';
6198         if ($#commitlist >= 100) {
6199                 $next_link =
6200                         $cgi->a({-href => href(-replay=>1, page=>$page+1),
6201                                  -accesskey => "n", -title => "Alt-n"}, "next");
6202                 $paging_nav .= " &sdot; $next_link";
6203         } else {
6204                 $paging_nav .= " &sdot; next";
6205         }
6206
6207         git_header_html();
6208
6209         git_print_page_nav('','', $hash,$co{'tree'},$hash, $paging_nav);
6210         git_print_header_div('commit', esc_html($co{'title'}), $hash);
6211         if ($page == 0 && !@commitlist) {
6212                 print "<p>No match.</p>\n";
6213         } else {
6214                 git_search_grep_body(\@commitlist, 0, 99, $next_link);
6215         }
6216
6217         git_footer_html();
6218 }
6219
6220 sub git_search_changes {
6221         my %co = @_;
6222
6223         local $/ = "\n";
6224         open my $fd, '-|', git_cmd(), '--no-pager', 'log', @diff_opts,
6225                 '--pretty=format:%H', '--no-abbrev', '--raw', "-S$searchtext",
6226                 ($search_use_regexp ? '--pickaxe-regex' : ())
6227                         or die_error(500, "Open git-log failed");
6228
6229         git_header_html();
6230
6231         git_print_page_nav('','', $hash,$co{'tree'},$hash);
6232         git_print_header_div('commit', esc_html($co{'title'}), $hash);
6233
6234         print "<table class=\"pickaxe search\">\n";
6235         my $alternate = 1;
6236         undef %co;
6237         my @files;
6238         while (my $line = <$fd>) {
6239                 chomp $line;
6240                 next unless $line;
6241
6242                 my %set = parse_difftree_raw_line($line);
6243                 if (defined $set{'commit'}) {
6244                         # finish previous commit
6245                         if (%co) {
6246                                 print "</td>\n" .
6247                                       "<td class=\"link\">" .
6248                                       $cgi->a({-href => href(action=>"commit", hash=>$co{'id'})},
6249                                               "commit") .
6250                                       " | " .
6251                                       $cgi->a({-href => href(action=>"tree", hash=>$co{'tree'},
6252                                                              hash_base=>$co{'id'})},
6253                                               "tree") .
6254                                       "</td>\n" .
6255                                       "</tr>\n";
6256                         }
6257
6258                         if ($alternate) {
6259                                 print "<tr class=\"dark\">\n";
6260                         } else {
6261                                 print "<tr class=\"light\">\n";
6262                         }
6263                         $alternate ^= 1;
6264                         %co = parse_commit($set{'commit'});
6265                         my $author = chop_and_escape_str($co{'author_name'}, 15, 5);
6266                         print "<td title=\"$co{'age_string_age'}\"><i>$co{'age_string_date'}</i></td>\n" .
6267                               "<td><i>$author</i></td>\n" .
6268                               "<td>" .
6269                               $cgi->a({-href => href(action=>"commit", hash=>$co{'id'}),
6270                                       -class => "list subject"},
6271                                       chop_and_escape_str($co{'title'}, 50) . "<br/>");
6272                 } elsif (defined $set{'to_id'}) {
6273                         next if ($set{'to_id'} =~ m/^0{40}$/);
6274
6275                         print $cgi->a({-href => href(action=>"blob", hash_base=>$co{'id'},
6276                                                      hash=>$set{'to_id'}, file_name=>$set{'to_file'}),
6277                                       -class => "list"},
6278                                       "<span class=\"match\">" . esc_path($set{'file'}) . "</span>") .
6279                               "<br/>\n";
6280                 }
6281         }
6282         close $fd;
6283
6284         # finish last commit (warning: repetition!)
6285         if (%co) {
6286                 print "</td>\n" .
6287                       "<td class=\"link\">" .
6288                       $cgi->a({-href => href(action=>"commit", hash=>$co{'id'})},
6289                               "commit") .
6290                       " | " .
6291                       $cgi->a({-href => href(action=>"tree", hash=>$co{'tree'},
6292                                              hash_base=>$co{'id'})},
6293                               "tree") .
6294                       "</td>\n" .
6295                       "</tr>\n";
6296         }
6297
6298         print "</table>\n";
6299
6300         git_footer_html();
6301 }
6302
6303 sub git_search_files {
6304         my %co = @_;
6305
6306         local $/ = "\n";
6307         open my $fd, "-|", git_cmd(), 'grep', '-n', '-z',
6308                 $search_use_regexp ? ('-E', '-i') : '-F',
6309                 $searchtext, $co{'tree'}
6310                         or die_error(500, "Open git-grep failed");
6311
6312         git_header_html();
6313
6314         git_print_page_nav('','', $hash,$co{'tree'},$hash);
6315         git_print_header_div('commit', esc_html($co{'title'}), $hash);
6316
6317         print "<table class=\"grep_search\">\n";
6318         my $alternate = 1;
6319         my $matches = 0;
6320         my $lastfile = '';
6321         my $file_href;
6322         while (my $line = <$fd>) {
6323                 chomp $line;
6324                 my ($file, $lno, $ltext, $binary);
6325                 last if ($matches++ > 1000);
6326                 if ($line =~ /^Binary file (.+) matches$/) {
6327                         $file = $1;
6328                         $binary = 1;
6329                 } else {
6330                         ($file, $lno, $ltext) = split(/\0/, $line, 3);
6331                         $file =~ s/^$co{'tree'}://;
6332                 }
6333                 if ($file ne $lastfile) {
6334                         $lastfile and print "</td></tr>\n";
6335                         if ($alternate++) {
6336                                 print "<tr class=\"dark\">\n";
6337                         } else {
6338                                 print "<tr class=\"light\">\n";
6339                         }
6340                         $file_href = href(action=>"blob", hash_base=>$co{'id'},
6341                                           file_name=>$file);
6342                         print "<td class=\"list\">".
6343                                 $cgi->a({-href => $file_href, -class => "list"}, esc_path($file));
6344                         print "</td><td>\n";
6345                         $lastfile = $file;
6346                 }
6347                 if ($binary) {
6348                         print "<div class=\"binary\">Binary file</div>\n";
6349                 } else {
6350                         $ltext = untabify($ltext);
6351                         if ($ltext =~ m/^(.*)($search_regexp)(.*)$/i) {
6352                                 $ltext = esc_html($1, -nbsp=>1);
6353                                 $ltext .= '<span class="match">';
6354                                 $ltext .= esc_html($2, -nbsp=>1);
6355                                 $ltext .= '</span>';
6356                                 $ltext .= esc_html($3, -nbsp=>1);
6357                         } else {
6358                                 $ltext = esc_html($ltext, -nbsp=>1);
6359                         }
6360                         print "<div class=\"pre\">" .
6361                                 $cgi->a({-href => $file_href.'#l'.$lno,
6362                                         -class => "linenr"}, sprintf('%4i', $lno)) .
6363                                 ' ' .  $ltext . "</div>\n";
6364                 }
6365         }
6366         if ($lastfile) {
6367                 print "</td></tr>\n";
6368                 if ($matches > 1000) {
6369                         print "<div class=\"diff nodifferences\">Too many matches, listing trimmed</div>\n";
6370                 }
6371         } else {
6372                 print "<div class=\"diff nodifferences\">No matches found</div>\n";
6373         }
6374         close $fd;
6375
6376         print "</table>\n";
6377
6378         git_footer_html();
6379 }
6380
6381 sub git_search_grep_body {
6382         my ($commitlist, $from, $to, $extra) = @_;
6383         $from = 0 unless defined $from;
6384         $to = $#{$commitlist} if (!defined $to || $#{$commitlist} < $to);
6385
6386         print "<table class=\"commit_search\">\n";
6387         my $alternate = 1;
6388         for (my $i = $from; $i <= $to; $i++) {
6389                 my %co = %{$commitlist->[$i]};
6390                 if (!%co) {
6391                         next;
6392                 }
6393                 my $commit = $co{'id'};
6394                 if ($alternate) {
6395                         print "<tr class=\"dark\">\n";
6396                 } else {
6397                         print "<tr class=\"light\">\n";
6398                 }
6399                 $alternate ^= 1;
6400                 print "<td title=\"$co{'age_string_age'}\"><i>$co{'age_string_date'}</i></td>\n" .
6401                       format_author_html('td', \%co, 15, 5) .
6402                       "<td>" .
6403                       $cgi->a({-href => href(action=>"commit", hash=>$co{'id'}),
6404                                -class => "list subject"},
6405                               chop_and_escape_str($co{'title'}, 50) . "<br/>");
6406                 my $comment = $co{'comment'};
6407                 foreach my $line (@$comment) {
6408                         if ($line =~ m/^(.*?)($search_regexp)(.*)$/i) {
6409                                 my ($lead, $match, $trail) = ($1, $2, $3);
6410                                 $match = chop_str($match, 70, 5, 'center');
6411                                 my $contextlen = int((80 - length($match))/2);
6412                                 $contextlen = 30 if ($contextlen > 30);
6413                                 $lead  = chop_str($lead,  $contextlen, 10, 'left');
6414                                 $trail = chop_str($trail, $contextlen, 10, 'right');
6415
6416                                 $lead  = esc_html($lead);
6417                                 $match = esc_html($match);
6418                                 $trail = esc_html($trail);
6419
6420                                 print "$lead<span class=\"match\">$match</span>$trail<br />";
6421                         }
6422                 }
6423                 print "</td>\n" .
6424                       "<td class=\"link\">" .
6425                       $cgi->a({-href => href(action=>"commit", hash=>$co{'id'})}, "commit") .
6426                       " | " .
6427                       $cgi->a({-href => href(action=>"commitdiff", hash=>$co{'id'})}, "commitdiff") .
6428                       " | " .
6429                       $cgi->a({-href => href(action=>"tree", hash=>$co{'tree'}, hash_base=>$co{'id'})}, "tree");
6430                 print "</td>\n" .
6431                       "</tr>\n";
6432         }
6433         if (defined $extra) {
6434                 print "<tr>\n" .
6435                       "<td colspan=\"3\">$extra</td>\n" .
6436                       "</tr>\n";
6437         }
6438         print "</table>\n";
6439 }
6440
6441 ## ======================================================================
6442 ## ======================================================================
6443 ## actions
6444
6445 sub git_project_list {
6446         my $order = $input_params{'order'};
6447         if (defined $order && $order !~ m/none|project|descr|owner|age/) {
6448                 die_error(400, "Unknown order parameter");
6449         }
6450
6451         my @list = git_get_projects_list($project_filter, $strict_export);
6452         if (!@list) {
6453                 die_error(404, "No projects found");
6454         }
6455
6456         git_header_html();
6457         if (defined $home_text && -f $home_text) {
6458                 print "<div class=\"index_include\">\n";
6459                 insert_file($home_text);
6460                 print "</div>\n";
6461         }
6462
6463         git_project_search_form($searchtext, $search_use_regexp);
6464         git_project_list_body(\@list, $order);
6465         git_footer_html();
6466 }
6467
6468 sub git_forks {
6469         my $order = $input_params{'order'};
6470         if (defined $order && $order !~ m/none|project|descr|owner|age/) {
6471                 die_error(400, "Unknown order parameter");
6472         }
6473
6474         my $filter = $project;
6475         $filter =~ s/\.git$//;
6476         my @list = git_get_projects_list($filter);
6477         if (!@list) {
6478                 die_error(404, "No forks found");
6479         }
6480
6481         git_header_html();
6482         git_print_page_nav('','');
6483         git_print_header_div('summary', "$project forks");
6484         git_project_list_body(\@list, $order);
6485         git_footer_html();
6486 }
6487
6488 sub git_project_index {
6489         my @projects = git_get_projects_list($project_filter, $strict_export);
6490         if (!@projects) {
6491                 die_error(404, "No projects found");
6492         }
6493
6494         print $cgi->header(
6495                 -type => 'text/plain',
6496                 -charset => 'utf-8',
6497                 -content_disposition => 'inline; filename="index.aux"');
6498
6499         foreach my $pr (@projects) {
6500                 if (!exists $pr->{'owner'}) {
6501                         $pr->{'owner'} = git_get_project_owner("$pr->{'path'}");
6502                 }
6503
6504                 my ($path, $owner) = ($pr->{'path'}, $pr->{'owner'});
6505                 # quote as in CGI::Util::encode, but keep the slash, and use '+' for ' '
6506                 $path  =~ s/([^a-zA-Z0-9_.\-\/ ])/sprintf("%%%02X", ord($1))/eg;
6507                 $owner =~ s/([^a-zA-Z0-9_.\-\/ ])/sprintf("%%%02X", ord($1))/eg;
6508                 $path  =~ s/ /\+/g;
6509                 $owner =~ s/ /\+/g;
6510
6511                 print "$path $owner\n";
6512         }
6513 }
6514
6515 sub git_summary {
6516         my $descr = git_get_project_description($project) || "none";
6517         my %co = parse_commit("HEAD");
6518         my %cd = %co ? parse_date($co{'committer_epoch'}, $co{'committer_tz'}) : ();
6519         my $head = $co{'id'};
6520         my $remote_heads = gitweb_check_feature('remote_heads');
6521
6522         my $owner = git_get_project_owner($project);
6523
6524         my $refs = git_get_references();
6525         # These get_*_list functions return one more to allow us to see if
6526         # there are more ...
6527         my @taglist  = git_get_tags_list(16);
6528         my @headlist = git_get_heads_list(16);
6529         my %remotedata = $remote_heads ? git_get_remotes_list() : ();
6530         my @forklist;
6531         my $check_forks = gitweb_check_feature('forks');
6532
6533         if ($check_forks) {
6534                 # find forks of a project
6535                 my $filter = $project;
6536                 $filter =~ s/\.git$//;
6537                 @forklist = git_get_projects_list($filter);
6538                 # filter out forks of forks
6539                 @forklist = filter_forks_from_projects_list(\@forklist)
6540                         if (@forklist);
6541         }
6542
6543         git_header_html();
6544         git_print_page_nav('summary','', $head);
6545
6546         print "<div class=\"title\">&nbsp;</div>\n";
6547         print "<table class=\"projects_list\">\n" .
6548               "<tr id=\"metadata_desc\"><td>description</td><td>" . esc_html($descr) . "</td></tr>\n";
6549         if ($owner and not $omit_owner) {
6550                 print  "<tr id=\"metadata_owner\"><td>owner</td><td>" . esc_html($owner) . "</td></tr>\n";
6551         }
6552         if (defined $cd{'rfc2822'}) {
6553                 print "<tr id=\"metadata_lchange\"><td>last change</td>" .
6554                       "<td>".format_timestamp_html(\%cd)."</td></tr>\n";
6555         }
6556
6557         # use per project git URL list in $projectroot/$project/cloneurl
6558         # or make project git URL from git base URL and project name
6559         my $url_tag = "URL";
6560         my @url_list = git_get_project_url_list($project);
6561         @url_list = map { "$_/$project" } @git_base_url_list unless @url_list;
6562         foreach my $git_url (@url_list) {
6563                 next unless $git_url;
6564                 print format_repo_url($url_tag, $git_url);
6565                 $url_tag = "";
6566         }
6567
6568         # Tag cloud
6569         my $show_ctags = gitweb_check_feature('ctags');
6570         if ($show_ctags) {
6571                 my $ctags = git_get_project_ctags($project);
6572                 if (%$ctags) {
6573                         # without ability to add tags, don't show if there are none
6574                         my $cloud = git_populate_project_tagcloud($ctags);
6575                         print "<tr id=\"metadata_ctags\">" .
6576                               "<td>content tags</td>" .
6577                               "<td>".git_show_project_tagcloud($cloud, 48)."</td>" .
6578                               "</tr>\n";
6579                 }
6580         }
6581
6582         print "</table>\n";
6583
6584         # If XSS prevention is on, we don't include README.html.
6585         # TODO: Allow a readme in some safe format.
6586         if (!$prevent_xss && -s "$projectroot/$project/README.html") {
6587                 print "<div class=\"title\">readme</div>\n" .
6588                       "<div class=\"readme\">\n";
6589                 insert_file("$projectroot/$project/README.html");
6590                 print "\n</div>\n"; # class="readme"
6591         }
6592
6593         # we need to request one more than 16 (0..15) to check if
6594         # those 16 are all
6595         my @commitlist = $head ? parse_commits($head, 17) : ();
6596         if (@commitlist) {
6597                 git_print_header_div('shortlog');
6598                 git_shortlog_body(\@commitlist, 0, 15, $refs,
6599                                   $#commitlist <=  15 ? undef :
6600                                   $cgi->a({-href => href(action=>"shortlog")}, "..."));
6601         }
6602
6603         if (@taglist) {
6604                 git_print_header_div('tags');
6605                 git_tags_body(\@taglist, 0, 15,
6606                               $#taglist <=  15 ? undef :
6607                               $cgi->a({-href => href(action=>"tags")}, "..."));
6608         }
6609
6610         if (@headlist) {
6611                 git_print_header_div('heads');
6612                 git_heads_body(\@headlist, $head, 0, 15,
6613                                $#headlist <= 15 ? undef :
6614                                $cgi->a({-href => href(action=>"heads")}, "..."));
6615         }
6616
6617         if (%remotedata) {
6618                 git_print_header_div('remotes');
6619                 git_remotes_body(\%remotedata, 15, $head);
6620         }
6621
6622         if (@forklist) {
6623                 git_print_header_div('forks');
6624                 git_project_list_body(\@forklist, 'age', 0, 15,
6625                                       $#forklist <= 15 ? undef :
6626                                       $cgi->a({-href => href(action=>"forks")}, "..."),
6627                                       'no_header');
6628         }
6629
6630         git_footer_html();
6631 }
6632
6633 sub git_tag {
6634         my %tag = parse_tag($hash);
6635
6636         if (! %tag) {
6637                 die_error(404, "Unknown tag object");
6638         }
6639
6640         my $head = git_get_head_hash($project);
6641         git_header_html();
6642         git_print_page_nav('','', $head,undef,$head);
6643         git_print_header_div('commit', esc_html($tag{'name'}), $hash);
6644         print "<div class=\"title_text\">\n" .
6645               "<table class=\"object_header\">\n" .
6646               "<tr>\n" .
6647               "<td>object</td>\n" .
6648               "<td>" . $cgi->a({-class => "list", -href => href(action=>$tag{'type'}, hash=>$tag{'object'})},
6649                                $tag{'object'}) . "</td>\n" .
6650               "<td class=\"link\">" . $cgi->a({-href => href(action=>$tag{'type'}, hash=>$tag{'object'})},
6651                                               $tag{'type'}) . "</td>\n" .
6652               "</tr>\n";
6653         if (defined($tag{'author'})) {
6654                 git_print_authorship_rows(\%tag, 'author');
6655         }
6656         print "</table>\n\n" .
6657               "</div>\n";
6658         print "<div class=\"page_body\">";
6659         my $comment = $tag{'comment'};
6660         foreach my $line (@$comment) {
6661                 chomp $line;
6662                 print esc_html($line, -nbsp=>1) . "<br/>\n";
6663         }
6664         print "</div>\n";
6665         git_footer_html();
6666 }
6667
6668 sub git_blame_common {
6669         my $format = shift || 'porcelain';
6670         if ($format eq 'porcelain' && $input_params{'javascript'}) {
6671                 $format = 'incremental';
6672                 $action = 'blame_incremental'; # for page title etc
6673         }
6674
6675         # permissions
6676         gitweb_check_feature('blame')
6677                 or die_error(403, "Blame view not allowed");
6678
6679         # error checking
6680         die_error(400, "No file name given") unless $file_name;
6681         $hash_base ||= git_get_head_hash($project);
6682         die_error(404, "Couldn't find base commit") unless $hash_base;
6683         my %co = parse_commit($hash_base)
6684                 or die_error(404, "Commit not found");
6685         my $ftype = "blob";
6686         if (!defined $hash) {
6687                 $hash = git_get_hash_by_path($hash_base, $file_name, "blob")
6688                         or die_error(404, "Error looking up file");
6689         } else {
6690                 $ftype = git_get_type($hash);
6691                 if ($ftype !~ "blob") {
6692                         die_error(400, "Object is not a blob");
6693                 }
6694         }
6695
6696         my $fd;
6697         if ($format eq 'incremental') {
6698                 # get file contents (as base)
6699                 open $fd, "-|", git_cmd(), 'cat-file', 'blob', $hash
6700                         or die_error(500, "Open git-cat-file failed");
6701         } elsif ($format eq 'data') {
6702                 # run git-blame --incremental
6703                 open $fd, "-|", git_cmd(), "blame", "--incremental",
6704                         $hash_base, "--", $file_name
6705                         or die_error(500, "Open git-blame --incremental failed");
6706         } else {
6707                 # run git-blame --porcelain
6708                 open $fd, "-|", git_cmd(), "blame", '-p',
6709                         $hash_base, '--', $file_name
6710                         or die_error(500, "Open git-blame --porcelain failed");
6711         }
6712         binmode $fd, ':utf8';
6713
6714         # incremental blame data returns early
6715         if ($format eq 'data') {
6716                 print $cgi->header(
6717                         -type=>"text/plain", -charset => "utf-8",
6718                         -status=> "200 OK");
6719                 local $| = 1; # output autoflush
6720                 while (my $line = <$fd>) {
6721                         print to_utf8($line);
6722                 }
6723                 close $fd
6724                         or print "ERROR $!\n";
6725
6726                 print 'END';
6727                 if (defined $t0 && gitweb_check_feature('timed')) {
6728                         print ' '.
6729                               tv_interval($t0, [ gettimeofday() ]).
6730                               ' '.$number_of_git_cmds;
6731                 }
6732                 print "\n";
6733
6734                 return;
6735         }
6736
6737         # page header
6738         git_header_html();
6739         my $formats_nav =
6740                 $cgi->a({-href => href(action=>"blob", -replay=>1)},
6741                         "blob") .
6742                 " | ";
6743         if ($format eq 'incremental') {
6744                 $formats_nav .=
6745                         $cgi->a({-href => href(action=>"blame", javascript=>0, -replay=>1)},
6746                                 "blame") . " (non-incremental)";
6747         } else {
6748                 $formats_nav .=
6749                         $cgi->a({-href => href(action=>"blame_incremental", -replay=>1)},
6750                                 "blame") . " (incremental)";
6751         }
6752         $formats_nav .=
6753                 " | " .
6754                 $cgi->a({-href => href(action=>"history", -replay=>1)},
6755                         "history") .
6756                 " | " .
6757                 $cgi->a({-href => href(action=>$action, file_name=>$file_name)},
6758                         "HEAD");
6759         git_print_page_nav('','', $hash_base,$co{'tree'},$hash_base, $formats_nav);
6760         git_print_header_div('commit', esc_html($co{'title'}), $hash_base);
6761         git_print_page_path($file_name, $ftype, $hash_base);
6762
6763         # page body
6764         if ($format eq 'incremental') {
6765                 print "<noscript>\n<div class=\"error\"><center><b>\n".
6766                       "This page requires JavaScript to run.\n Use ".
6767                       $cgi->a({-href => href(action=>'blame',javascript=>0,-replay=>1)},
6768                               'this page').
6769                       " instead.\n".
6770                       "</b></center></div>\n</noscript>\n";
6771
6772                 print qq!<div id="progress_bar" style="width: 100%; background-color: yellow"></div>\n!;
6773         }
6774
6775         print qq!<div class="page_body">\n!;
6776         print qq!<div id="progress_info">... / ...</div>\n!
6777                 if ($format eq 'incremental');
6778         print qq!<table id="blame_table" class="blame" width="100%">\n!.
6779               #qq!<col width="5.5em" /><col width="2.5em" /><col width="*" />\n!.
6780               qq!<thead>\n!.
6781               qq!<tr><th>Commit</th><th>Line</th><th>Data</th></tr>\n!.
6782               qq!</thead>\n!.
6783               qq!<tbody>\n!;
6784
6785         my @rev_color = qw(light dark);
6786         my $num_colors = scalar(@rev_color);
6787         my $current_color = 0;
6788
6789         if ($format eq 'incremental') {
6790                 my $color_class = $rev_color[$current_color];
6791
6792                 #contents of a file
6793                 my $linenr = 0;
6794         LINE:
6795                 while (my $line = <$fd>) {
6796                         chomp $line;
6797                         $linenr++;
6798
6799                         print qq!<tr id="l$linenr" class="$color_class">!.
6800                               qq!<td class="sha1"><a href=""> </a></td>!.
6801                               qq!<td class="linenr">!.
6802                               qq!<a class="linenr" href="">$linenr</a></td>!;
6803                         print qq!<td class="pre">! . esc_html($line) . "</td>\n";
6804                         print qq!</tr>\n!;
6805                 }
6806
6807         } else { # porcelain, i.e. ordinary blame
6808                 my %metainfo = (); # saves information about commits
6809
6810                 # blame data
6811         LINE:
6812                 while (my $line = <$fd>) {
6813                         chomp $line;
6814                         # the header: <SHA-1> <src lineno> <dst lineno> [<lines in group>]
6815                         # no <lines in group> for subsequent lines in group of lines
6816                         my ($full_rev, $orig_lineno, $lineno, $group_size) =
6817                            ($line =~ /^([0-9a-f]{40}) (\d+) (\d+)(?: (\d+))?$/);
6818                         if (!exists $metainfo{$full_rev}) {
6819                                 $metainfo{$full_rev} = { 'nprevious' => 0 };
6820                         }
6821                         my $meta = $metainfo{$full_rev};
6822                         my $data;
6823                         while ($data = <$fd>) {
6824                                 chomp $data;
6825                                 last if ($data =~ s/^\t//); # contents of line
6826                                 if ($data =~ /^(\S+)(?: (.*))?$/) {
6827                                         $meta->{$1} = $2 unless exists $meta->{$1};
6828                                 }
6829                                 if ($data =~ /^previous /) {
6830                                         $meta->{'nprevious'}++;
6831                                 }
6832                         }
6833                         my $short_rev = substr($full_rev, 0, 8);
6834                         my $author = $meta->{'author'};
6835                         my %date =
6836                                 parse_date($meta->{'author-time'}, $meta->{'author-tz'});
6837                         my $date = $date{'iso-tz'};
6838                         if ($group_size) {
6839                                 $current_color = ($current_color + 1) % $num_colors;
6840                         }
6841                         my $tr_class = $rev_color[$current_color];
6842                         $tr_class .= ' boundary' if (exists $meta->{'boundary'});
6843                         $tr_class .= ' no-previous' if ($meta->{'nprevious'} == 0);
6844                         $tr_class .= ' multiple-previous' if ($meta->{'nprevious'} > 1);
6845                         print "<tr id=\"l$lineno\" class=\"$tr_class\">\n";
6846                         if ($group_size) {
6847                                 print "<td class=\"sha1\"";
6848                                 print " title=\"". esc_html($author) . ", $date\"";
6849                                 print " rowspan=\"$group_size\"" if ($group_size > 1);
6850                                 print ">";
6851                                 print $cgi->a({-href => href(action=>"commit",
6852                                                              hash=>$full_rev,
6853                                                              file_name=>$file_name)},
6854                                               esc_html($short_rev));
6855                                 if ($group_size >= 2) {
6856                                         my @author_initials = ($author =~ /\b([[:upper:]])\B/g);
6857                                         if (@author_initials) {
6858                                                 print "<br />" .
6859                                                       esc_html(join('', @author_initials));
6860                                                 #           or join('.', ...)
6861                                         }
6862                                 }
6863                                 print "</td>\n";
6864                         }
6865                         # 'previous' <sha1 of parent commit> <filename at commit>
6866                         if (exists $meta->{'previous'} &&
6867                             $meta->{'previous'} =~ /^([a-fA-F0-9]{40}) (.*)$/) {
6868                                 $meta->{'parent'} = $1;
6869                                 $meta->{'file_parent'} = unquote($2);
6870                         }
6871                         my $linenr_commit =
6872                                 exists($meta->{'parent'}) ?
6873                                 $meta->{'parent'} : $full_rev;
6874                         my $linenr_filename =
6875                                 exists($meta->{'file_parent'}) ?
6876                                 $meta->{'file_parent'} : unquote($meta->{'filename'});
6877                         my $blamed = href(action => 'blame',
6878                                           file_name => $linenr_filename,
6879                                           hash_base => $linenr_commit);
6880                         print "<td class=\"linenr\">";
6881                         print $cgi->a({ -href => "$blamed#l$orig_lineno",
6882                                         -class => "linenr" },
6883                                       esc_html($lineno));
6884                         print "</td>";
6885                         print "<td class=\"pre\">" . esc_html($data) . "</td>\n";
6886                         print "</tr>\n";
6887                 } # end while
6888
6889         }
6890
6891         # footer
6892         print "</tbody>\n".
6893               "</table>\n"; # class="blame"
6894         print "</div>\n";   # class="blame_body"
6895         close $fd
6896                 or print "Reading blob failed\n";
6897
6898         git_footer_html();
6899 }
6900
6901 sub git_blame {
6902         git_blame_common();
6903 }
6904
6905 sub git_blame_incremental {
6906         git_blame_common('incremental');
6907 }
6908
6909 sub git_blame_data {
6910         git_blame_common('data');
6911 }
6912
6913 sub git_tags {
6914         my $head = git_get_head_hash($project);
6915         git_header_html();
6916         git_print_page_nav('','', $head,undef,$head,format_ref_views('tags'));
6917         git_print_header_div('summary', $project);
6918
6919         my @tagslist = git_get_tags_list();
6920         if (@tagslist) {
6921                 git_tags_body(\@tagslist);
6922         }
6923         git_footer_html();
6924 }
6925
6926 sub git_heads {
6927         my $head = git_get_head_hash($project);
6928         git_header_html();
6929         git_print_page_nav('','', $head,undef,$head,format_ref_views('heads'));
6930         git_print_header_div('summary', $project);
6931
6932         my @headslist = git_get_heads_list();
6933         if (@headslist) {
6934                 git_heads_body(\@headslist, $head);
6935         }
6936         git_footer_html();
6937 }
6938
6939 # used both for single remote view and for list of all the remotes
6940 sub git_remotes {
6941         gitweb_check_feature('remote_heads')
6942                 or die_error(403, "Remote heads view is disabled");
6943
6944         my $head = git_get_head_hash($project);
6945         my $remote = $input_params{'hash'};
6946
6947         my $remotedata = git_get_remotes_list($remote);
6948         die_error(500, "Unable to get remote information") unless defined $remotedata;
6949
6950         unless (%$remotedata) {
6951                 die_error(404, defined $remote ?
6952                         "Remote $remote not found" :
6953                         "No remotes found");
6954         }
6955
6956         git_header_html(undef, undef, -action_extra => $remote);
6957         git_print_page_nav('', '',  $head, undef, $head,
6958                 format_ref_views($remote ? '' : 'remotes'));
6959
6960         fill_remote_heads($remotedata);
6961         if (defined $remote) {
6962                 git_print_header_div('remotes', "$remote remote for $project");
6963                 git_remote_block($remote, $remotedata->{$remote}, undef, $head);
6964         } else {
6965                 git_print_header_div('summary', "$project remotes");
6966                 git_remotes_body($remotedata, undef, $head);
6967         }
6968
6969         git_footer_html();
6970 }
6971
6972 sub git_blob_plain {
6973         my $type = shift;
6974         my $expires;
6975
6976         if (!defined $hash) {
6977                 if (defined $file_name) {
6978                         my $base = $hash_base || git_get_head_hash($project);
6979                         $hash = git_get_hash_by_path($base, $file_name, "blob")
6980                                 or die_error(404, "Cannot find file");
6981                 } else {
6982                         die_error(400, "No file name defined");
6983                 }
6984         } elsif ($hash =~ m/^[0-9a-fA-F]{40}$/) {
6985                 # blobs defined by non-textual hash id's can be cached
6986                 $expires = "+1d";
6987         }
6988
6989         open my $fd, "-|", git_cmd(), "cat-file", "blob", $hash
6990                 or die_error(500, "Open git-cat-file blob '$hash' failed");
6991
6992         # content-type (can include charset)
6993         $type = blob_contenttype($fd, $file_name, $type);
6994
6995         # "save as" filename, even when no $file_name is given
6996         my $save_as = "$hash";
6997         if (defined $file_name) {
6998                 $save_as = $file_name;
6999         } elsif ($type =~ m/^text\//) {
7000                 $save_as .= '.txt';
7001         }
7002
7003         # With XSS prevention on, blobs of all types except a few known safe
7004         # ones are served with "Content-Disposition: attachment" to make sure
7005         # they don't run in our security domain.  For certain image types,
7006         # blob view writes an <img> tag referring to blob_plain view, and we
7007         # want to be sure not to break that by serving the image as an
7008         # attachment (though Firefox 3 doesn't seem to care).
7009         my $sandbox = $prevent_xss &&
7010                 $type !~ m!^(?:text/[a-z]+|image/(?:gif|png|jpeg))(?:[ ;]|$)!;
7011
7012         # serve text/* as text/plain
7013         if ($prevent_xss &&
7014             ($type =~ m!^text/[a-z]+\b(.*)$! ||
7015              ($type =~ m!^[a-z]+/[a-z]\+xml\b(.*)$! && -T $fd))) {
7016                 my $rest = $1;
7017                 $rest = defined $rest ? $rest : '';
7018                 $type = "text/plain$rest";
7019         }
7020
7021         print $cgi->header(
7022                 -type => $type,
7023                 -expires => $expires,
7024                 -content_disposition =>
7025                         ($sandbox ? 'attachment' : 'inline')
7026                         . '; filename="' . $save_as . '"');
7027         local $/ = undef;
7028         binmode STDOUT, ':raw';
7029         print <$fd>;
7030         binmode STDOUT, ':utf8'; # as set at the beginning of gitweb.cgi
7031         close $fd;
7032 }
7033
7034 sub git_blob {
7035         my $expires;
7036
7037         if (!defined $hash) {
7038                 if (defined $file_name) {
7039                         my $base = $hash_base || git_get_head_hash($project);
7040                         $hash = git_get_hash_by_path($base, $file_name, "blob")
7041                                 or die_error(404, "Cannot find file");
7042                 } else {
7043                         die_error(400, "No file name defined");
7044                 }
7045         } elsif ($hash =~ m/^[0-9a-fA-F]{40}$/) {
7046                 # blobs defined by non-textual hash id's can be cached
7047                 $expires = "+1d";
7048         }
7049
7050         my $have_blame = gitweb_check_feature('blame');
7051         open my $fd, "-|", git_cmd(), "cat-file", "blob", $hash
7052                 or die_error(500, "Couldn't cat $file_name, $hash");
7053         my $mimetype = blob_mimetype($fd, $file_name);
7054         # use 'blob_plain' (aka 'raw') view for files that cannot be displayed
7055         if ($mimetype !~ m!^(?:text/|image/(?:gif|png|jpeg)$)! && -B $fd) {
7056                 close $fd;
7057                 return git_blob_plain($mimetype);
7058         }
7059         # we can have blame only for text/* mimetype
7060         $have_blame &&= ($mimetype =~ m!^text/!);
7061
7062         my $highlight = gitweb_check_feature('highlight');
7063         my $syntax = guess_file_syntax($highlight, $mimetype, $file_name);
7064         $fd = run_highlighter($fd, $highlight, $syntax)
7065                 if $syntax;
7066
7067         git_header_html(undef, $expires);
7068         my $formats_nav = '';
7069         if (defined $hash_base && (my %co = parse_commit($hash_base))) {
7070                 if (defined $file_name) {
7071                         if ($have_blame) {
7072                                 $formats_nav .=
7073                                         $cgi->a({-href => href(action=>"blame", -replay=>1)},
7074                                                 "blame") .
7075                                         " | ";
7076                         }
7077                         $formats_nav .=
7078                                 $cgi->a({-href => href(action=>"history", -replay=>1)},
7079                                         "history") .
7080                                 " | " .
7081                                 $cgi->a({-href => href(action=>"blob_plain", -replay=>1)},
7082                                         "raw") .
7083                                 " | " .
7084                                 $cgi->a({-href => href(action=>"blob",
7085                                                        hash_base=>"HEAD", file_name=>$file_name)},
7086                                         "HEAD");
7087                 } else {
7088                         $formats_nav .=
7089                                 $cgi->a({-href => href(action=>"blob_plain", -replay=>1)},
7090                                         "raw");
7091                 }
7092                 git_print_page_nav('','', $hash_base,$co{'tree'},$hash_base, $formats_nav);
7093                 git_print_header_div('commit', esc_html($co{'title'}), $hash_base);
7094         } else {
7095                 print "<div class=\"page_nav\">\n" .
7096                       "<br/><br/></div>\n" .
7097                       "<div class=\"title\">".esc_html($hash)."</div>\n";
7098         }
7099         git_print_page_path($file_name, "blob", $hash_base);
7100         print "<div class=\"page_body\">\n";
7101         if ($mimetype =~ m!^image/!) {
7102                 print qq!<img class="blob" type="!.esc_attr($mimetype).qq!"!;
7103                 if ($file_name) {
7104                         print qq! alt="!.esc_attr($file_name).qq!" title="!.esc_attr($file_name).qq!"!;
7105                 }
7106                 print qq! src="! .
7107                       href(action=>"blob_plain", hash=>$hash,
7108                            hash_base=>$hash_base, file_name=>$file_name) .
7109                       qq!" />\n!;
7110         } else {
7111                 my $nr;
7112                 while (my $line = <$fd>) {
7113                         chomp $line;
7114                         $nr++;
7115                         $line = untabify($line);
7116                         printf qq!<div class="pre"><a id="l%i" href="%s#l%i" class="linenr">%4i</a> %s</div>\n!,
7117                                $nr, esc_attr(href(-replay => 1)), $nr, $nr,
7118                                $syntax ? sanitize($line) : esc_html($line, -nbsp=>1);
7119                 }
7120         }
7121         close $fd
7122                 or print "Reading blob failed.\n";
7123         print "</div>";
7124         git_footer_html();
7125 }
7126
7127 sub git_tree {
7128         if (!defined $hash_base) {
7129                 $hash_base = "HEAD";
7130         }
7131         if (!defined $hash) {
7132                 if (defined $file_name) {
7133                         $hash = git_get_hash_by_path($hash_base, $file_name, "tree");
7134                 } else {
7135                         $hash = $hash_base;
7136                 }
7137         }
7138         die_error(404, "No such tree") unless defined($hash);
7139
7140         my $show_sizes = gitweb_check_feature('show-sizes');
7141         my $have_blame = gitweb_check_feature('blame');
7142
7143         my @entries = ();
7144         {
7145                 local $/ = "\0";
7146                 open my $fd, "-|", git_cmd(), "ls-tree", '-z',
7147                         ($show_sizes ? '-l' : ()), @extra_options, $hash
7148                         or die_error(500, "Open git-ls-tree failed");
7149                 @entries = map { chomp; $_ } <$fd>;
7150                 close $fd
7151                         or die_error(404, "Reading tree failed");
7152         }
7153
7154         my $refs = git_get_references();
7155         my $ref = format_ref_marker($refs, $hash_base);
7156         git_header_html();
7157         my $basedir = '';
7158         if (defined $hash_base && (my %co = parse_commit($hash_base))) {
7159                 my @views_nav = ();
7160                 if (defined $file_name) {
7161                         push @views_nav,
7162                                 $cgi->a({-href => href(action=>"history", -replay=>1)},
7163                                         "history"),
7164                                 $cgi->a({-href => href(action=>"tree",
7165                                                        hash_base=>"HEAD", file_name=>$file_name)},
7166                                         "HEAD"),
7167                 }
7168                 my $snapshot_links = format_snapshot_links($hash);
7169                 if (defined $snapshot_links) {
7170                         # FIXME: Should be available when we have no hash base as well.
7171                         push @views_nav, $snapshot_links;
7172                 }
7173                 git_print_page_nav('tree','', $hash_base, undef, undef,
7174                                    join(' | ', @views_nav));
7175                 git_print_header_div('commit', esc_html($co{'title'}) . $ref, $hash_base);
7176         } else {
7177                 undef $hash_base;
7178                 print "<div class=\"page_nav\">\n";
7179                 print "<br/><br/></div>\n";
7180                 print "<div class=\"title\">".esc_html($hash)."</div>\n";
7181         }
7182         if (defined $file_name) {
7183                 $basedir = $file_name;
7184                 if ($basedir ne '' && substr($basedir, -1) ne '/') {
7185                         $basedir .= '/';
7186                 }
7187                 git_print_page_path($file_name, 'tree', $hash_base);
7188         }
7189         print "<div class=\"page_body\">\n";
7190         print "<table class=\"tree\">\n";
7191         my $alternate = 1;
7192         # '..' (top directory) link if possible
7193         if (defined $hash_base &&
7194             defined $file_name && $file_name =~ m![^/]+$!) {
7195                 if ($alternate) {
7196                         print "<tr class=\"dark\">\n";
7197                 } else {
7198                         print "<tr class=\"light\">\n";
7199                 }
7200                 $alternate ^= 1;
7201
7202                 my $up = $file_name;
7203                 $up =~ s!/?[^/]+$!!;
7204                 undef $up unless $up;
7205                 # based on git_print_tree_entry
7206                 print '<td class="mode">' . mode_str('040000') . "</td>\n";
7207                 print '<td class="size">&nbsp;</td>'."\n" if $show_sizes;
7208                 print '<td class="list">';
7209                 print $cgi->a({-href => href(action=>"tree",
7210                                              hash_base=>$hash_base,
7211                                              file_name=>$up)},
7212                               "..");
7213                 print "</td>\n";
7214                 print "<td class=\"link\"></td>\n";
7215
7216                 print "</tr>\n";
7217         }
7218         foreach my $line (@entries) {
7219                 my %t = parse_ls_tree_line($line, -z => 1, -l => $show_sizes);
7220
7221                 if ($alternate) {
7222                         print "<tr class=\"dark\">\n";
7223                 } else {
7224                         print "<tr class=\"light\">\n";
7225                 }
7226                 $alternate ^= 1;
7227
7228                 git_print_tree_entry(\%t, $basedir, $hash_base, $have_blame);
7229
7230                 print "</tr>\n";
7231         }
7232         print "</table>\n" .
7233               "</div>";
7234         git_footer_html();
7235 }
7236
7237 sub sanitize_for_filename {
7238     my $name = shift;
7239
7240     $name =~ s!/!-!g;
7241     $name =~ s/[^[:alnum:]_.-]//g;
7242
7243     return $name;
7244 }
7245
7246 sub snapshot_name {
7247         my ($project, $hash) = @_;
7248
7249         # path/to/project.git  -> project
7250         # path/to/project/.git -> project
7251         my $name = to_utf8($project);
7252         $name =~ s,([^/])/*\.git$,$1,;
7253         $name = sanitize_for_filename(basename($name));
7254
7255         my $ver = $hash;
7256         if ($hash =~ /^[0-9a-fA-F]+$/) {
7257                 # shorten SHA-1 hash
7258                 my $full_hash = git_get_full_hash($project, $hash);
7259                 if ($full_hash =~ /^$hash/ && length($hash) > 7) {
7260                         $ver = git_get_short_hash($project, $hash);
7261                 }
7262         } elsif ($hash =~ m!^refs/tags/(.*)$!) {
7263                 # tags don't need shortened SHA-1 hash
7264                 $ver = $1;
7265         } else {
7266                 # branches and other need shortened SHA-1 hash
7267                 my $strip_refs = join '|', map { quotemeta } get_branch_refs();
7268                 if ($hash =~ m!^refs/($strip_refs|remotes)/(.*)$!) {
7269                         my $ref_dir = (defined $1) ? $1 : '';
7270                         $ver = $2;
7271
7272                         $ref_dir = sanitize_for_filename($ref_dir);
7273                         # for refs neither in heads nor remotes we want to
7274                         # add a ref dir to archive name
7275                         if ($ref_dir ne '' and $ref_dir ne 'heads' and $ref_dir ne 'remotes') {
7276                                 $ver = $ref_dir . '-' . $ver;
7277                         }
7278                 }
7279                 $ver .= '-' . git_get_short_hash($project, $hash);
7280         }
7281         # special case of sanitization for filename - we change
7282         # slashes to dots instead of dashes
7283         # in case of hierarchical branch names
7284         $ver =~ s!/!.!g;
7285         $ver =~ s/[^[:alnum:]_.-]//g;
7286
7287         # name = project-version_string
7288         $name = "$name-$ver";
7289
7290         return wantarray ? ($name, $name) : $name;
7291 }
7292
7293 sub exit_if_unmodified_since {
7294         my ($latest_epoch) = @_;
7295         our $cgi;
7296
7297         my $if_modified = $cgi->http('IF_MODIFIED_SINCE');
7298         if (defined $if_modified) {
7299                 my $since;
7300                 if (eval { require HTTP::Date; 1; }) {
7301                         $since = HTTP::Date::str2time($if_modified);
7302                 } elsif (eval { require Time::ParseDate; 1; }) {
7303                         $since = Time::ParseDate::parsedate($if_modified, GMT => 1);
7304                 }
7305                 if (defined $since && $latest_epoch <= $since) {
7306                         my %latest_date = parse_date($latest_epoch);
7307                         print $cgi->header(
7308                                 -last_modified => $latest_date{'rfc2822'},
7309                                 -status => '304 Not Modified');
7310                         goto DONE_GITWEB;
7311                 }
7312         }
7313 }
7314
7315 sub git_snapshot {
7316         my $format = $input_params{'snapshot_format'};
7317         if (!@snapshot_fmts) {
7318                 die_error(403, "Snapshots not allowed");
7319         }
7320         # default to first supported snapshot format
7321         $format ||= $snapshot_fmts[0];
7322         if ($format !~ m/^[a-z0-9]+$/) {
7323                 die_error(400, "Invalid snapshot format parameter");
7324         } elsif (!exists($known_snapshot_formats{$format})) {
7325                 die_error(400, "Unknown snapshot format");
7326         } elsif ($known_snapshot_formats{$format}{'disabled'}) {
7327                 die_error(403, "Snapshot format not allowed");
7328         } elsif (!grep($_ eq $format, @snapshot_fmts)) {
7329                 die_error(403, "Unsupported snapshot format");
7330         }
7331
7332         my $type = git_get_type("$hash^{}");
7333         if (!$type) {
7334                 die_error(404, 'Object does not exist');
7335         }  elsif ($type eq 'blob') {
7336                 die_error(400, 'Object is not a tree-ish');
7337         }
7338
7339         my ($name, $prefix) = snapshot_name($project, $hash);
7340         my $filename = "$name$known_snapshot_formats{$format}{'suffix'}";
7341
7342         my %co = parse_commit($hash);
7343         exit_if_unmodified_since($co{'committer_epoch'}) if %co;
7344
7345         my $cmd = quote_command(
7346                 git_cmd(), 'archive',
7347                 "--format=$known_snapshot_formats{$format}{'format'}",
7348                 "--prefix=$prefix/", $hash);
7349         if (exists $known_snapshot_formats{$format}{'compressor'}) {
7350                 $cmd .= ' | ' . quote_command(@{$known_snapshot_formats{$format}{'compressor'}});
7351         }
7352
7353         $filename =~ s/(["\\])/\\$1/g;
7354         my %latest_date;
7355         if (%co) {
7356                 %latest_date = parse_date($co{'committer_epoch'}, $co{'committer_tz'});
7357         }
7358
7359         print $cgi->header(
7360                 -type => $known_snapshot_formats{$format}{'type'},
7361                 -content_disposition => 'inline; filename="' . $filename . '"',
7362                 %co ? (-last_modified => $latest_date{'rfc2822'}) : (),
7363                 -status => '200 OK');
7364
7365         open my $fd, "-|", $cmd
7366                 or die_error(500, "Execute git-archive failed");
7367         binmode STDOUT, ':raw';
7368         print <$fd>;
7369         binmode STDOUT, ':utf8'; # as set at the beginning of gitweb.cgi
7370         close $fd;
7371 }
7372
7373 sub git_log_generic {
7374         my ($fmt_name, $body_subr, $base, $parent, $file_name, $file_hash) = @_;
7375
7376         my $head = git_get_head_hash($project);
7377         if (!defined $base) {
7378                 $base = $head;
7379         }
7380         if (!defined $page) {
7381                 $page = 0;
7382         }
7383         my $refs = git_get_references();
7384
7385         my $commit_hash = $base;
7386         if (defined $parent) {
7387                 $commit_hash = "$parent..$base";
7388         }
7389         my @commitlist =
7390                 parse_commits($commit_hash, 101, (100 * $page),
7391                               defined $file_name ? ($file_name, "--full-history") : ());
7392
7393         my $ftype;
7394         if (!defined $file_hash && defined $file_name) {
7395                 # some commits could have deleted file in question,
7396                 # and not have it in tree, but one of them has to have it
7397                 for (my $i = 0; $i < @commitlist; $i++) {
7398                         $file_hash = git_get_hash_by_path($commitlist[$i]{'id'}, $file_name);
7399                         last if defined $file_hash;
7400                 }
7401         }
7402         if (defined $file_hash) {
7403                 $ftype = git_get_type($file_hash);
7404         }
7405         if (defined $file_name && !defined $ftype) {
7406                 die_error(500, "Unknown type of object");
7407         }
7408         my %co;
7409         if (defined $file_name) {
7410                 %co = parse_commit($base)
7411                         or die_error(404, "Unknown commit object");
7412         }
7413
7414
7415         my $paging_nav = format_paging_nav($fmt_name, $page, $#commitlist >= 100);
7416         my $next_link = '';
7417         if ($#commitlist >= 100) {
7418                 $next_link =
7419                         $cgi->a({-href => href(-replay=>1, page=>$page+1),
7420                                  -accesskey => "n", -title => "Alt-n"}, "next");
7421         }
7422         my $patch_max = gitweb_get_feature('patches');
7423         if ($patch_max && !defined $file_name) {
7424                 if ($patch_max < 0 || @commitlist <= $patch_max) {
7425                         $paging_nav .= " &sdot; " .
7426                                 $cgi->a({-href => href(action=>"patches", -replay=>1)},
7427                                         "patches");
7428                 }
7429         }
7430
7431         git_header_html();
7432         git_print_page_nav($fmt_name,'', $hash,$hash,$hash, $paging_nav);
7433         if (defined $file_name) {
7434                 git_print_header_div('commit', esc_html($co{'title'}), $base);
7435         } else {
7436                 git_print_header_div('summary', $project)
7437         }
7438         git_print_page_path($file_name, $ftype, $hash_base)
7439                 if (defined $file_name);
7440
7441         $body_subr->(\@commitlist, 0, 99, $refs, $next_link,
7442                      $file_name, $file_hash, $ftype);
7443
7444         git_footer_html();
7445 }
7446
7447 sub git_log {
7448         git_log_generic('log', \&git_log_body,
7449                         $hash, $hash_parent);
7450 }
7451
7452 sub git_commit {
7453         $hash ||= $hash_base || "HEAD";
7454         my %co = parse_commit($hash)
7455             or die_error(404, "Unknown commit object");
7456
7457         my $parent  = $co{'parent'};
7458         my $parents = $co{'parents'}; # listref
7459
7460         # we need to prepare $formats_nav before any parameter munging
7461         my $formats_nav;
7462         if (!defined $parent) {
7463                 # --root commitdiff
7464                 $formats_nav .= '(initial)';
7465         } elsif (@$parents == 1) {
7466                 # single parent commit
7467                 $formats_nav .=
7468                         '(parent: ' .
7469                         $cgi->a({-href => href(action=>"commit",
7470                                                hash=>$parent)},
7471                                 esc_html(substr($parent, 0, 7))) .
7472                         ')';
7473         } else {
7474                 # merge commit
7475                 $formats_nav .=
7476                         '(merge: ' .
7477                         join(' ', map {
7478                                 $cgi->a({-href => href(action=>"commit",
7479                                                        hash=>$_)},
7480                                         esc_html(substr($_, 0, 7)));
7481                         } @$parents ) .
7482                         ')';
7483         }
7484         if (gitweb_check_feature('patches') && @$parents <= 1) {
7485                 $formats_nav .= " | " .
7486                         $cgi->a({-href => href(action=>"patch", -replay=>1)},
7487                                 "patch");
7488         }
7489
7490         if (!defined $parent) {
7491                 $parent = "--root";
7492         }
7493         my @difftree;
7494         open my $fd, "-|", git_cmd(), "diff-tree", '-r', "--no-commit-id",
7495                 @diff_opts,
7496                 (@$parents <= 1 ? $parent : '-c'),
7497                 $hash, "--"
7498                 or die_error(500, "Open git-diff-tree failed");
7499         @difftree = map { chomp; $_ } <$fd>;
7500         close $fd or die_error(404, "Reading git-diff-tree failed");
7501
7502         # non-textual hash id's can be cached
7503         my $expires;
7504         if ($hash =~ m/^[0-9a-fA-F]{40}$/) {
7505                 $expires = "+1d";
7506         }
7507         my $refs = git_get_references();
7508         my $ref = format_ref_marker($refs, $co{'id'});
7509
7510         git_header_html(undef, $expires);
7511         git_print_page_nav('commit', '',
7512                            $hash, $co{'tree'}, $hash,
7513                            $formats_nav);
7514
7515         if (defined $co{'parent'}) {
7516                 git_print_header_div('commitdiff', esc_html($co{'title'}) . $ref, $hash);
7517         } else {
7518                 git_print_header_div('tree', esc_html($co{'title'}) . $ref, $co{'tree'}, $hash);
7519         }
7520         print "<div class=\"title_text\">\n" .
7521               "<table class=\"object_header\">\n";
7522         git_print_authorship_rows(\%co);
7523         print "<tr><td>commit</td><td class=\"sha1\">$co{'id'}</td></tr>\n";
7524         print "<tr>" .
7525               "<td>tree</td>" .
7526               "<td class=\"sha1\">" .
7527               $cgi->a({-href => href(action=>"tree", hash=>$co{'tree'}, hash_base=>$hash),
7528                        class => "list"}, $co{'tree'}) .
7529               "</td>" .
7530               "<td class=\"link\">" .
7531               $cgi->a({-href => href(action=>"tree", hash=>$co{'tree'}, hash_base=>$hash)},
7532                       "tree");
7533         my $snapshot_links = format_snapshot_links($hash);
7534         if (defined $snapshot_links) {
7535                 print " | " . $snapshot_links;
7536         }
7537         print "</td>" .
7538               "</tr>\n";
7539
7540         foreach my $par (@$parents) {
7541                 print "<tr>" .
7542                       "<td>parent</td>" .
7543                       "<td class=\"sha1\">" .
7544                       $cgi->a({-href => href(action=>"commit", hash=>$par),
7545                                class => "list"}, $par) .
7546                       "</td>" .
7547                       "<td class=\"link\">" .
7548                       $cgi->a({-href => href(action=>"commit", hash=>$par)}, "commit") .
7549                       " | " .
7550                       $cgi->a({-href => href(action=>"commitdiff", hash=>$hash, hash_parent=>$par)}, "diff") .
7551                       "</td>" .
7552                       "</tr>\n";
7553         }
7554         print "</table>".
7555               "</div>\n";
7556
7557         print "<div class=\"page_body\">\n";
7558         git_print_log($co{'comment'});
7559         print "</div>\n";
7560
7561         git_difftree_body(\@difftree, $hash, @$parents);
7562
7563         git_footer_html();
7564 }
7565
7566 sub git_object {
7567         # object is defined by:
7568         # - hash or hash_base alone
7569         # - hash_base and file_name
7570         my $type;
7571
7572         # - hash or hash_base alone
7573         if ($hash || ($hash_base && !defined $file_name)) {
7574                 my $object_id = $hash || $hash_base;
7575
7576                 open my $fd, "-|", quote_command(
7577                         git_cmd(), 'cat-file', '-t', $object_id) . ' 2> /dev/null'
7578                         or die_error(404, "Object does not exist");
7579                 $type = <$fd>;
7580                 chomp $type;
7581                 close $fd
7582                         or die_error(404, "Object does not exist");
7583
7584         # - hash_base and file_name
7585         } elsif ($hash_base && defined $file_name) {
7586                 $file_name =~ s,/+$,,;
7587
7588                 system(git_cmd(), "cat-file", '-e', $hash_base) == 0
7589                         or die_error(404, "Base object does not exist");
7590
7591                 # here errors should not happen
7592                 open my $fd, "-|", git_cmd(), "ls-tree", $hash_base, "--", $file_name
7593                         or die_error(500, "Open git-ls-tree failed");
7594                 my $line = <$fd>;
7595                 close $fd;
7596
7597                 #'100644 blob 0fa3f3a66fb6a137f6ec2c19351ed4d807070ffa  panic.c'
7598                 unless ($line && $line =~ m/^([0-9]+) (.+) ([0-9a-fA-F]{40})\t/) {
7599                         die_error(404, "File or directory for given base does not exist");
7600                 }
7601                 $type = $2;
7602                 $hash = $3;
7603         } else {
7604                 die_error(400, "Not enough information to find object");
7605         }
7606
7607         print $cgi->redirect(-uri => href(action=>$type, -full=>1,
7608                                           hash=>$hash, hash_base=>$hash_base,
7609                                           file_name=>$file_name),
7610                              -status => '302 Found');
7611 }
7612
7613 sub git_blobdiff {
7614         my $format = shift || 'html';
7615         my $diff_style = $input_params{'diff_style'} || 'inline';
7616
7617         my $fd;
7618         my @difftree;
7619         my %diffinfo;
7620         my $expires;
7621
7622         # preparing $fd and %diffinfo for git_patchset_body
7623         # new style URI
7624         if (defined $hash_base && defined $hash_parent_base) {
7625                 if (defined $file_name) {
7626                         # read raw output
7627                         open $fd, "-|", git_cmd(), "diff-tree", '-r', @diff_opts,
7628                                 $hash_parent_base, $hash_base,
7629                                 "--", (defined $file_parent ? $file_parent : ()), $file_name
7630                                 or die_error(500, "Open git-diff-tree failed");
7631                         @difftree = map { chomp; $_ } <$fd>;
7632                         close $fd
7633                                 or die_error(404, "Reading git-diff-tree failed");
7634                         @difftree
7635                                 or die_error(404, "Blob diff not found");
7636
7637                 } elsif (defined $hash &&
7638                          $hash =~ /[0-9a-fA-F]{40}/) {
7639                         # try to find filename from $hash
7640
7641                         # read filtered raw output
7642                         open $fd, "-|", git_cmd(), "diff-tree", '-r', @diff_opts,
7643                                 $hash_parent_base, $hash_base, "--"
7644                                 or die_error(500, "Open git-diff-tree failed");
7645                         @difftree =
7646                                 # ':100644 100644 03b21826... 3b93d5e7... M     ls-files.c'
7647                                 # $hash == to_id
7648                                 grep { /^:[0-7]{6} [0-7]{6} [0-9a-fA-F]{40} $hash/ }
7649                                 map { chomp; $_ } <$fd>;
7650                         close $fd
7651                                 or die_error(404, "Reading git-diff-tree failed");
7652                         @difftree
7653                                 or die_error(404, "Blob diff not found");
7654
7655                 } else {
7656                         die_error(400, "Missing one of the blob diff parameters");
7657                 }
7658
7659                 if (@difftree > 1) {
7660                         die_error(400, "Ambiguous blob diff specification");
7661                 }
7662
7663                 %diffinfo = parse_difftree_raw_line($difftree[0]);
7664                 $file_parent ||= $diffinfo{'from_file'} || $file_name;
7665                 $file_name   ||= $diffinfo{'to_file'};
7666
7667                 $hash_parent ||= $diffinfo{'from_id'};
7668                 $hash        ||= $diffinfo{'to_id'};
7669
7670                 # non-textual hash id's can be cached
7671                 if ($hash_base =~ m/^[0-9a-fA-F]{40}$/ &&
7672                     $hash_parent_base =~ m/^[0-9a-fA-F]{40}$/) {
7673                         $expires = '+1d';
7674                 }
7675
7676                 # open patch output
7677                 open $fd, "-|", git_cmd(), "diff-tree", '-r', @diff_opts,
7678                         '-p', ($format eq 'html' ? "--full-index" : ()),
7679                         $hash_parent_base, $hash_base,
7680                         "--", (defined $file_parent ? $file_parent : ()), $file_name
7681                         or die_error(500, "Open git-diff-tree failed");
7682         }
7683
7684         # old/legacy style URI -- not generated anymore since 1.4.3.
7685         if (!%diffinfo) {
7686                 die_error('404 Not Found', "Missing one of the blob diff parameters")
7687         }
7688
7689         # header
7690         if ($format eq 'html') {
7691                 my $formats_nav =
7692                         $cgi->a({-href => href(action=>"blobdiff_plain", -replay=>1)},
7693                                 "raw");
7694                 $formats_nav .= diff_style_nav($diff_style);
7695                 git_header_html(undef, $expires);
7696                 if (defined $hash_base && (my %co = parse_commit($hash_base))) {
7697                         git_print_page_nav('','', $hash_base,$co{'tree'},$hash_base, $formats_nav);
7698                         git_print_header_div('commit', esc_html($co{'title'}), $hash_base);
7699                 } else {
7700                         print "<div class=\"page_nav\"><br/>$formats_nav<br/></div>\n";
7701                         print "<div class=\"title\">".esc_html("$hash vs $hash_parent")."</div>\n";
7702                 }
7703                 if (defined $file_name) {
7704                         git_print_page_path($file_name, "blob", $hash_base);
7705                 } else {
7706                         print "<div class=\"page_path\"></div>\n";
7707                 }
7708
7709         } elsif ($format eq 'plain') {
7710                 print $cgi->header(
7711                         -type => 'text/plain',
7712                         -charset => 'utf-8',
7713                         -expires => $expires,
7714                         -content_disposition => 'inline; filename="' . "$file_name" . '.patch"');
7715
7716                 print "X-Git-Url: " . $cgi->self_url() . "\n\n";
7717
7718         } else {
7719                 die_error(400, "Unknown blobdiff format");
7720         }
7721
7722         # patch
7723         if ($format eq 'html') {
7724                 print "<div class=\"page_body\">\n";
7725
7726                 git_patchset_body($fd, $diff_style,
7727                                   [ \%diffinfo ], $hash_base, $hash_parent_base);
7728                 close $fd;
7729
7730                 print "</div>\n"; # class="page_body"
7731                 git_footer_html();
7732
7733         } else {
7734                 while (my $line = <$fd>) {
7735                         $line =~ s!a/($hash|$hash_parent)!'a/'.esc_path($diffinfo{'from_file'})!eg;
7736                         $line =~ s!b/($hash|$hash_parent)!'b/'.esc_path($diffinfo{'to_file'})!eg;
7737
7738                         print $line;
7739
7740                         last if $line =~ m!^\+\+\+!;
7741                 }
7742                 local $/ = undef;
7743                 print <$fd>;
7744                 close $fd;
7745         }
7746 }
7747
7748 sub git_blobdiff_plain {
7749         git_blobdiff('plain');
7750 }
7751
7752 # assumes that it is added as later part of already existing navigation,
7753 # so it returns "| foo | bar" rather than just "foo | bar"
7754 sub diff_style_nav {
7755         my ($diff_style, $is_combined) = @_;
7756         $diff_style ||= 'inline';
7757
7758         return "" if ($is_combined);
7759
7760         my @styles = (inline => 'inline', 'sidebyside' => 'side by side');
7761         my %styles = @styles;
7762         @styles =
7763                 @styles[ map { $_ * 2 } 0..$#styles/2 ];
7764
7765         return join '',
7766                 map { " | ".$_ }
7767                 map {
7768                         $_ eq $diff_style ? $styles{$_} :
7769                         $cgi->a({-href => href(-replay=>1, diff_style => $_)}, $styles{$_})
7770                 } @styles;
7771 }
7772
7773 sub git_commitdiff {
7774         my %params = @_;
7775         my $format = $params{-format} || 'html';
7776         my $diff_style = $input_params{'diff_style'} || 'inline';
7777
7778         my ($patch_max) = gitweb_get_feature('patches');
7779         if ($format eq 'patch') {
7780                 die_error(403, "Patch view not allowed") unless $patch_max;
7781         }
7782
7783         $hash ||= $hash_base || "HEAD";
7784         my %co = parse_commit($hash)
7785             or die_error(404, "Unknown commit object");
7786
7787         # choose format for commitdiff for merge
7788         if (! defined $hash_parent && @{$co{'parents'}} > 1) {
7789                 $hash_parent = '--cc';
7790         }
7791         # we need to prepare $formats_nav before almost any parameter munging
7792         my $formats_nav;
7793         if ($format eq 'html') {
7794                 $formats_nav =
7795                         $cgi->a({-href => href(action=>"commitdiff_plain", -replay=>1)},
7796                                 "raw");
7797                 if ($patch_max && @{$co{'parents'}} <= 1) {
7798                         $formats_nav .= " | " .
7799                                 $cgi->a({-href => href(action=>"patch", -replay=>1)},
7800                                         "patch");
7801                 }
7802                 $formats_nav .= diff_style_nav($diff_style, @{$co{'parents'}} > 1);
7803
7804                 if (defined $hash_parent &&
7805                     $hash_parent ne '-c' && $hash_parent ne '--cc') {
7806                         # commitdiff with two commits given
7807                         my $hash_parent_short = $hash_parent;
7808                         if ($hash_parent =~ m/^[0-9a-fA-F]{40}$/) {
7809                                 $hash_parent_short = substr($hash_parent, 0, 7);
7810                         }
7811                         $formats_nav .=
7812                                 ' (from';
7813                         for (my $i = 0; $i < @{$co{'parents'}}; $i++) {
7814                                 if ($co{'parents'}[$i] eq $hash_parent) {
7815                                         $formats_nav .= ' parent ' . ($i+1);
7816                                         last;
7817                                 }
7818                         }
7819                         $formats_nav .= ': ' .
7820                                 $cgi->a({-href => href(-replay=>1,
7821                                                        hash=>$hash_parent, hash_base=>undef)},
7822                                         esc_html($hash_parent_short)) .
7823                                 ')';
7824                 } elsif (!$co{'parent'}) {
7825                         # --root commitdiff
7826                         $formats_nav .= ' (initial)';
7827                 } elsif (scalar @{$co{'parents'}} == 1) {
7828                         # single parent commit
7829                         $formats_nav .=
7830                                 ' (parent: ' .
7831                                 $cgi->a({-href => href(-replay=>1,
7832                                                        hash=>$co{'parent'}, hash_base=>undef)},
7833                                         esc_html(substr($co{'parent'}, 0, 7))) .
7834                                 ')';
7835                 } else {
7836                         # merge commit
7837                         if ($hash_parent eq '--cc') {
7838                                 $formats_nav .= ' | ' .
7839                                         $cgi->a({-href => href(-replay=>1,
7840                                                                hash=>$hash, hash_parent=>'-c')},
7841                                                 'combined');
7842                         } else { # $hash_parent eq '-c'
7843                                 $formats_nav .= ' | ' .
7844                                         $cgi->a({-href => href(-replay=>1,
7845                                                                hash=>$hash, hash_parent=>'--cc')},
7846                                                 'compact');
7847                         }
7848                         $formats_nav .=
7849                                 ' (merge: ' .
7850                                 join(' ', map {
7851                                         $cgi->a({-href => href(-replay=>1,
7852                                                                hash=>$_, hash_base=>undef)},
7853                                                 esc_html(substr($_, 0, 7)));
7854                                 } @{$co{'parents'}} ) .
7855                                 ')';
7856                 }
7857         }
7858
7859         my $hash_parent_param = $hash_parent;
7860         if (!defined $hash_parent_param) {
7861                 # --cc for multiple parents, --root for parentless
7862                 $hash_parent_param =
7863                         @{$co{'parents'}} > 1 ? '--cc' : $co{'parent'} || '--root';
7864         }
7865
7866         # read commitdiff
7867         my $fd;
7868         my @difftree;
7869         if ($format eq 'html') {
7870                 open $fd, "-|", git_cmd(), "diff-tree", '-r', @diff_opts,
7871                         "--no-commit-id", "--patch-with-raw", "--full-index",
7872                         $hash_parent_param, $hash, "--"
7873                         or die_error(500, "Open git-diff-tree failed");
7874
7875                 while (my $line = <$fd>) {
7876                         chomp $line;
7877                         # empty line ends raw part of diff-tree output
7878                         last unless $line;
7879                         push @difftree, scalar parse_difftree_raw_line($line);
7880                 }
7881
7882         } elsif ($format eq 'plain') {
7883                 open $fd, "-|", git_cmd(), "diff-tree", '-r', @diff_opts,
7884                         '-p', $hash_parent_param, $hash, "--"
7885                         or die_error(500, "Open git-diff-tree failed");
7886         } elsif ($format eq 'patch') {
7887                 # For commit ranges, we limit the output to the number of
7888                 # patches specified in the 'patches' feature.
7889                 # For single commits, we limit the output to a single patch,
7890                 # diverging from the git-format-patch default.
7891                 my @commit_spec = ();
7892                 if ($hash_parent) {
7893                         if ($patch_max > 0) {
7894                                 push @commit_spec, "-$patch_max";
7895                         }
7896                         push @commit_spec, '-n', "$hash_parent..$hash";
7897                 } else {
7898                         if ($params{-single}) {
7899                                 push @commit_spec, '-1';
7900                         } else {
7901                                 if ($patch_max > 0) {
7902                                         push @commit_spec, "-$patch_max";
7903                                 }
7904                                 push @commit_spec, "-n";
7905                         }
7906                         push @commit_spec, '--root', $hash;
7907                 }
7908                 open $fd, "-|", git_cmd(), "format-patch", @diff_opts,
7909                         '--encoding=utf8', '--stdout', @commit_spec
7910                         or die_error(500, "Open git-format-patch failed");
7911         } else {
7912                 die_error(400, "Unknown commitdiff format");
7913         }
7914
7915         # non-textual hash id's can be cached
7916         my $expires;
7917         if ($hash =~ m/^[0-9a-fA-F]{40}$/) {
7918                 $expires = "+1d";
7919         }
7920
7921         # write commit message
7922         if ($format eq 'html') {
7923                 my $refs = git_get_references();
7924                 my $ref = format_ref_marker($refs, $co{'id'});
7925
7926                 git_header_html(undef, $expires);
7927                 git_print_page_nav('commitdiff','', $hash,$co{'tree'},$hash, $formats_nav);
7928                 git_print_header_div('commit', esc_html($co{'title'}) . $ref, $hash);
7929                 print "<div class=\"title_text\">\n" .
7930                       "<table class=\"object_header\">\n";
7931                 git_print_authorship_rows(\%co);
7932                 print "</table>".
7933                       "</div>\n";
7934                 print "<div class=\"page_body\">\n";
7935                 if (@{$co{'comment'}} > 1) {
7936                         print "<div class=\"log\">\n";
7937                         git_print_log($co{'comment'}, -final_empty_line=> 1, -remove_title => 1);
7938                         print "</div>\n"; # class="log"
7939                 }
7940
7941         } elsif ($format eq 'plain') {
7942                 my $refs = git_get_references("tags");
7943                 my $tagname = git_get_rev_name_tags($hash);
7944                 my $filename = basename($project) . "-$hash.patch";
7945
7946                 print $cgi->header(
7947                         -type => 'text/plain',
7948                         -charset => 'utf-8',
7949                         -expires => $expires,
7950                         -content_disposition => 'inline; filename="' . "$filename" . '"');
7951                 my %ad = parse_date($co{'author_epoch'}, $co{'author_tz'});
7952                 print "From: " . to_utf8($co{'author'}) . "\n";
7953                 print "Date: $ad{'rfc2822'} ($ad{'tz_local'})\n";
7954                 print "Subject: " . to_utf8($co{'title'}) . "\n";
7955
7956                 print "X-Git-Tag: $tagname\n" if $tagname;
7957                 print "X-Git-Url: " . $cgi->self_url() . "\n\n";
7958
7959                 foreach my $line (@{$co{'comment'}}) {
7960                         print to_utf8($line) . "\n";
7961                 }
7962                 print "---\n\n";
7963         } elsif ($format eq 'patch') {
7964                 my $filename = basename($project) . "-$hash.patch";
7965
7966                 print $cgi->header(
7967                         -type => 'text/plain',
7968                         -charset => 'utf-8',
7969                         -expires => $expires,
7970                         -content_disposition => 'inline; filename="' . "$filename" . '"');
7971         }
7972
7973         # write patch
7974         if ($format eq 'html') {
7975                 my $use_parents = !defined $hash_parent ||
7976                         $hash_parent eq '-c' || $hash_parent eq '--cc';
7977                 git_difftree_body(\@difftree, $hash,
7978                                   $use_parents ? @{$co{'parents'}} : $hash_parent);
7979                 print "<br/>\n";
7980
7981                 git_patchset_body($fd, $diff_style,
7982                                   \@difftree, $hash,
7983                                   $use_parents ? @{$co{'parents'}} : $hash_parent);
7984                 close $fd;
7985                 print "</div>\n"; # class="page_body"
7986                 git_footer_html();
7987
7988         } elsif ($format eq 'plain') {
7989                 local $/ = undef;
7990                 print <$fd>;
7991                 close $fd
7992                         or print "Reading git-diff-tree failed\n";
7993         } elsif ($format eq 'patch') {
7994                 local $/ = undef;
7995                 print <$fd>;
7996                 close $fd
7997                         or print "Reading git-format-patch failed\n";
7998         }
7999 }
8000
8001 sub git_commitdiff_plain {
8002         git_commitdiff(-format => 'plain');
8003 }
8004
8005 # format-patch-style patches
8006 sub git_patch {
8007         git_commitdiff(-format => 'patch', -single => 1);
8008 }
8009
8010 sub git_patches {
8011         git_commitdiff(-format => 'patch');
8012 }
8013
8014 sub git_history {
8015         git_log_generic('history', \&git_history_body,
8016                         $hash_base, $hash_parent_base,
8017                         $file_name, $hash);
8018 }
8019
8020 sub git_search {
8021         $searchtype ||= 'commit';
8022
8023         # check if appropriate features are enabled
8024         gitweb_check_feature('search')
8025                 or die_error(403, "Search is disabled");
8026         if ($searchtype eq 'pickaxe') {
8027                 # pickaxe may take all resources of your box and run for several minutes
8028                 # with every query - so decide by yourself how public you make this feature
8029                 gitweb_check_feature('pickaxe')
8030                         or die_error(403, "Pickaxe search is disabled");
8031         }
8032         if ($searchtype eq 'grep') {
8033                 # grep search might be potentially CPU-intensive, too
8034                 gitweb_check_feature('grep')
8035                         or die_error(403, "Grep search is disabled");
8036         }
8037
8038         if (!defined $searchtext) {
8039                 die_error(400, "Text field is empty");
8040         }
8041         if (!defined $hash) {
8042                 $hash = git_get_head_hash($project);
8043         }
8044         my %co = parse_commit($hash);
8045         if (!%co) {
8046                 die_error(404, "Unknown commit object");
8047         }
8048         if (!defined $page) {
8049                 $page = 0;
8050         }
8051
8052         if ($searchtype eq 'commit' ||
8053             $searchtype eq 'author' ||
8054             $searchtype eq 'committer') {
8055                 git_search_message(%co);
8056         } elsif ($searchtype eq 'pickaxe') {
8057                 git_search_changes(%co);
8058         } elsif ($searchtype eq 'grep') {
8059                 git_search_files(%co);
8060         } else {
8061                 die_error(400, "Unknown search type");
8062         }
8063 }
8064
8065 sub git_search_help {
8066         git_header_html();
8067         git_print_page_nav('','', $hash,$hash,$hash);
8068         print <<EOT;
8069 <p><strong>Pattern</strong> is by default a normal string that is matched precisely (but without
8070 regard to case, except in the case of pickaxe). However, when you check the <em>re</em> checkbox,
8071 the pattern entered is recognized as the POSIX extended
8072 <a href="http://en.wikipedia.org/wiki/Regular_expression">regular expression</a> (also case
8073 insensitive).</p>
8074 <dl>
8075 <dt><b>commit</b></dt>
8076 <dd>The commit messages and authorship information will be scanned for the given pattern.</dd>
8077 EOT
8078         my $have_grep = gitweb_check_feature('grep');
8079         if ($have_grep) {
8080                 print <<EOT;
8081 <dt><b>grep</b></dt>
8082 <dd>All files in the currently selected tree (HEAD unless you are explicitly browsing
8083     a different one) are searched for the given pattern. On large trees, this search can take
8084 a while and put some strain on the server, so please use it with some consideration. Note that
8085 due to git-grep peculiarity, currently if regexp mode is turned off, the matches are
8086 case-sensitive.</dd>
8087 EOT
8088         }
8089         print <<EOT;
8090 <dt><b>author</b></dt>
8091 <dd>Name and e-mail of the change author and date of birth of the patch will be scanned for the given pattern.</dd>
8092 <dt><b>committer</b></dt>
8093 <dd>Name and e-mail of the committer and date of commit will be scanned for the given pattern.</dd>
8094 EOT
8095         my $have_pickaxe = gitweb_check_feature('pickaxe');
8096         if ($have_pickaxe) {
8097                 print <<EOT;
8098 <dt><b>pickaxe</b></dt>
8099 <dd>All commits that caused the string to appear or disappear from any file (changes that
8100 added, removed or "modified" the string) will be listed. This search can take a while and
8101 takes a lot of strain on the server, so please use it wisely. Note that since you may be
8102 interested even in changes just changing the case as well, this search is case sensitive.</dd>
8103 EOT
8104         }
8105         print "</dl>\n";
8106         git_footer_html();
8107 }
8108
8109 sub git_shortlog {
8110         git_log_generic('shortlog', \&git_shortlog_body,
8111                         $hash, $hash_parent);
8112 }
8113
8114 ## ......................................................................
8115 ## feeds (RSS, Atom; OPML)
8116
8117 sub git_feed {
8118         my $format = shift || 'atom';
8119         my $have_blame = gitweb_check_feature('blame');
8120
8121         # Atom: http://www.atomenabled.org/developers/syndication/
8122         # RSS:  http://www.notestips.com/80256B3A007F2692/1/NAMO5P9UPQ
8123         if ($format ne 'rss' && $format ne 'atom') {
8124                 die_error(400, "Unknown web feed format");
8125         }
8126
8127         # log/feed of current (HEAD) branch, log of given branch, history of file/directory
8128         my $head = $hash || 'HEAD';
8129         my @commitlist = parse_commits($head, 150, 0, $file_name);
8130
8131         my %latest_commit;
8132         my %latest_date;
8133         my $content_type = "application/$format+xml";
8134         if (defined $cgi->http('HTTP_ACCEPT') &&
8135                  $cgi->Accept('text/xml') > $cgi->Accept($content_type)) {
8136                 # browser (feed reader) prefers text/xml
8137                 $content_type = 'text/xml';
8138         }
8139         if (defined($commitlist[0])) {
8140                 %latest_commit = %{$commitlist[0]};
8141                 my $latest_epoch = $latest_commit{'committer_epoch'};
8142                 exit_if_unmodified_since($latest_epoch);
8143                 %latest_date = parse_date($latest_epoch, $latest_commit{'committer_tz'});
8144         }
8145         print $cgi->header(
8146                 -type => $content_type,
8147                 -charset => 'utf-8',
8148                 %latest_date ? (-last_modified => $latest_date{'rfc2822'}) : (),
8149                 -status => '200 OK');
8150
8151         # Optimization: skip generating the body if client asks only
8152         # for Last-Modified date.
8153         return if ($cgi->request_method() eq 'HEAD');
8154
8155         # header variables
8156         my $title = "$site_name - $project/$action";
8157         my $feed_type = 'log';
8158         if (defined $hash) {
8159                 $title .= " - '$hash'";
8160                 $feed_type = 'branch log';
8161                 if (defined $file_name) {
8162                         $title .= " :: $file_name";
8163                         $feed_type = 'history';
8164                 }
8165         } elsif (defined $file_name) {
8166                 $title .= " - $file_name";
8167                 $feed_type = 'history';
8168         }
8169         $title .= " $feed_type";
8170         $title = esc_html($title);
8171         my $descr = git_get_project_description($project);
8172         if (defined $descr) {
8173                 $descr = esc_html($descr);
8174         } else {
8175                 $descr = "$project " .
8176                          ($format eq 'rss' ? 'RSS' : 'Atom') .
8177                          " feed";
8178         }
8179         my $owner = git_get_project_owner($project);
8180         $owner = esc_html($owner);
8181
8182         #header
8183         my $alt_url;
8184         if (defined $file_name) {
8185                 $alt_url = href(-full=>1, action=>"history", hash=>$hash, file_name=>$file_name);
8186         } elsif (defined $hash) {
8187                 $alt_url = href(-full=>1, action=>"log", hash=>$hash);
8188         } else {
8189                 $alt_url = href(-full=>1, action=>"summary");
8190         }
8191         print qq!<?xml version="1.0" encoding="utf-8"?>\n!;
8192         if ($format eq 'rss') {
8193                 print <<XML;
8194 <rss version="2.0" xmlns:content="http://purl.org/rss/1.0/modules/content/">
8195 <channel>
8196 XML
8197                 print "<title>$title</title>\n" .
8198                       "<link>$alt_url</link>\n" .
8199                       "<description>$descr</description>\n" .
8200                       "<language>en</language>\n" .
8201                       # project owner is responsible for 'editorial' content
8202                       "<managingEditor>$owner</managingEditor>\n";
8203                 if (defined $logo || defined $favicon) {
8204                         # prefer the logo to the favicon, since RSS
8205                         # doesn't allow both
8206                         my $img = esc_url($logo || $favicon);
8207                         print "<image>\n" .
8208                               "<url>$img</url>\n" .
8209                               "<title>$title</title>\n" .
8210                               "<link>$alt_url</link>\n" .
8211                               "</image>\n";
8212                 }
8213                 if (%latest_date) {
8214                         print "<pubDate>$latest_date{'rfc2822'}</pubDate>\n";
8215                         print "<lastBuildDate>$latest_date{'rfc2822'}</lastBuildDate>\n";
8216                 }
8217                 print "<generator>gitweb v.$version/$git_version</generator>\n";
8218         } elsif ($format eq 'atom') {
8219                 print <<XML;
8220 <feed xmlns="http://www.w3.org/2005/Atom">
8221 XML
8222                 print "<title>$title</title>\n" .
8223                       "<subtitle>$descr</subtitle>\n" .
8224                       '<link rel="alternate" type="text/html" href="' .
8225                       $alt_url . '" />' . "\n" .
8226                       '<link rel="self" type="' . $content_type . '" href="' .
8227                       $cgi->self_url() . '" />' . "\n" .
8228                       "<id>" . href(-full=>1) . "</id>\n" .
8229                       # use project owner for feed author
8230                       "<author><name>$owner</name></author>\n";
8231                 if (defined $favicon) {
8232                         print "<icon>" . esc_url($favicon) . "</icon>\n";
8233                 }
8234                 if (defined $logo) {
8235                         # not twice as wide as tall: 72 x 27 pixels
8236                         print "<logo>" . esc_url($logo) . "</logo>\n";
8237                 }
8238                 if (! %latest_date) {
8239                         # dummy date to keep the feed valid until commits trickle in:
8240                         print "<updated>1970-01-01T00:00:00Z</updated>\n";
8241                 } else {
8242                         print "<updated>$latest_date{'iso-8601'}</updated>\n";
8243                 }
8244                 print "<generator version='$version/$git_version'>gitweb</generator>\n";
8245         }
8246
8247         # contents
8248         for (my $i = 0; $i <= $#commitlist; $i++) {
8249                 my %co = %{$commitlist[$i]};
8250                 my $commit = $co{'id'};
8251                 # we read 150, we always show 30 and the ones more recent than 48 hours
8252                 if (($i >= 20) && ((time - $co{'author_epoch'}) > 48*60*60)) {
8253                         last;
8254                 }
8255                 my %cd = parse_date($co{'author_epoch'}, $co{'author_tz'});
8256
8257                 # get list of changed files
8258                 open my $fd, "-|", git_cmd(), "diff-tree", '-r', @diff_opts,
8259                         $co{'parent'} || "--root",
8260                         $co{'id'}, "--", (defined $file_name ? $file_name : ())
8261                         or next;
8262                 my @difftree = map { chomp; $_ } <$fd>;
8263                 close $fd
8264                         or next;
8265
8266                 # print element (entry, item)
8267                 my $co_url = href(-full=>1, action=>"commitdiff", hash=>$commit);
8268                 if ($format eq 'rss') {
8269                         print "<item>\n" .
8270                               "<title>" . esc_html($co{'title'}) . "</title>\n" .
8271                               "<author>" . esc_html($co{'author'}) . "</author>\n" .
8272                               "<pubDate>$cd{'rfc2822'}</pubDate>\n" .
8273                               "<guid isPermaLink=\"true\">$co_url</guid>\n" .
8274                               "<link>$co_url</link>\n" .
8275                               "<description>" . esc_html($co{'title'}) . "</description>\n" .
8276                               "<content:encoded>" .
8277                               "<![CDATA[\n";
8278                 } elsif ($format eq 'atom') {
8279                         print "<entry>\n" .
8280                               "<title type=\"html\">" . esc_html($co{'title'}) . "</title>\n" .
8281                               "<updated>$cd{'iso-8601'}</updated>\n" .
8282                               "<author>\n" .
8283                               "  <name>" . esc_html($co{'author_name'}) . "</name>\n";
8284                         if ($co{'author_email'}) {
8285                                 print "  <email>" . esc_html($co{'author_email'}) . "</email>\n";
8286                         }
8287                         print "</author>\n" .
8288                               # use committer for contributor
8289                               "<contributor>\n" .
8290                               "  <name>" . esc_html($co{'committer_name'}) . "</name>\n";
8291                         if ($co{'committer_email'}) {
8292                                 print "  <email>" . esc_html($co{'committer_email'}) . "</email>\n";
8293                         }
8294                         print "</contributor>\n" .
8295                               "<published>$cd{'iso-8601'}</published>\n" .
8296                               "<link rel=\"alternate\" type=\"text/html\" href=\"$co_url\" />\n" .
8297                               "<id>$co_url</id>\n" .
8298                               "<content type=\"xhtml\" xml:base=\"" . esc_url($my_url) . "\">\n" .
8299                               "<div xmlns=\"http://www.w3.org/1999/xhtml\">\n";
8300                 }
8301                 my $comment = $co{'comment'};
8302                 print "<pre>\n";
8303                 foreach my $line (@$comment) {
8304                         $line = esc_html($line);
8305                         print "$line\n";
8306                 }
8307                 print "</pre><ul>\n";
8308                 foreach my $difftree_line (@difftree) {
8309                         my %difftree = parse_difftree_raw_line($difftree_line);
8310                         next if !$difftree{'from_id'};
8311
8312                         my $file = $difftree{'file'} || $difftree{'to_file'};
8313
8314                         print "<li>" .
8315                               "[" .
8316                               $cgi->a({-href => href(-full=>1, action=>"blobdiff",
8317                                                      hash=>$difftree{'to_id'}, hash_parent=>$difftree{'from_id'},
8318                                                      hash_base=>$co{'id'}, hash_parent_base=>$co{'parent'},
8319                                                      file_name=>$file, file_parent=>$difftree{'from_file'}),
8320                                       -title => "diff"}, 'D');
8321                         if ($have_blame) {
8322                                 print $cgi->a({-href => href(-full=>1, action=>"blame",
8323                                                              file_name=>$file, hash_base=>$commit),
8324                                               -title => "blame"}, 'B');
8325                         }
8326                         # if this is not a feed of a file history
8327                         if (!defined $file_name || $file_name ne $file) {
8328                                 print $cgi->a({-href => href(-full=>1, action=>"history",
8329                                                              file_name=>$file, hash=>$commit),
8330                                               -title => "history"}, 'H');
8331                         }
8332                         $file = esc_path($file);
8333                         print "] ".
8334                               "$file</li>\n";
8335                 }
8336                 if ($format eq 'rss') {
8337                         print "</ul>]]>\n" .
8338                               "</content:encoded>\n" .
8339                               "</item>\n";
8340                 } elsif ($format eq 'atom') {
8341                         print "</ul>\n</div>\n" .
8342                               "</content>\n" .
8343                               "</entry>\n";
8344                 }
8345         }
8346
8347         # end of feed
8348         if ($format eq 'rss') {
8349                 print "</channel>\n</rss>\n";
8350         } elsif ($format eq 'atom') {
8351                 print "</feed>\n";
8352         }
8353 }
8354
8355 sub git_rss {
8356         git_feed('rss');
8357 }
8358
8359 sub git_atom {
8360         git_feed('atom');
8361 }
8362
8363 sub git_opml {
8364         my @list = git_get_projects_list($project_filter, $strict_export);
8365         if (!@list) {
8366                 die_error(404, "No projects found");
8367         }
8368
8369         print $cgi->header(
8370                 -type => 'text/xml',
8371                 -charset => 'utf-8',
8372                 -content_disposition => 'inline; filename="opml.xml"');
8373
8374         my $title = esc_html($site_name);
8375         my $filter = " within subdirectory ";
8376         if (defined $project_filter) {
8377                 $filter .= esc_html($project_filter);
8378         } else {
8379                 $filter = "";
8380         }
8381         print <<XML;
8382 <?xml version="1.0" encoding="utf-8"?>
8383 <opml version="1.0">
8384 <head>
8385   <title>$title OPML Export$filter</title>
8386 </head>
8387 <body>
8388 <outline text="git RSS feeds">
8389 XML
8390
8391         foreach my $pr (@list) {
8392                 my %proj = %$pr;
8393                 my $head = git_get_head_hash($proj{'path'});
8394                 if (!defined $head) {
8395                         next;
8396                 }
8397                 $git_dir = "$projectroot/$proj{'path'}";
8398                 my %co = parse_commit($head);
8399                 if (!%co) {
8400                         next;
8401                 }
8402
8403                 my $path = esc_html(chop_str($proj{'path'}, 25, 5));
8404                 my $rss  = href('project' => $proj{'path'}, 'action' => 'rss', -full => 1);
8405                 my $html = href('project' => $proj{'path'}, 'action' => 'summary', -full => 1);
8406                 print "<outline type=\"rss\" text=\"$path\" title=\"$path\" xmlUrl=\"$rss\" htmlUrl=\"$html\"/>\n";
8407         }
8408         print <<XML;
8409 </outline>
8410 </body>
8411 </opml>
8412 XML
8413 }