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 $extra; # pager or formats
4314
4315         my @navs = qw(summary log commit commitdiff tree);
4316         if ($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                         $arg{'log'}{'hash'} = $head;
4327                 }
4328         }
4329
4330         $arg{'log'}{'action'} = 'shortlog';
4331         if ($current eq 'log') {
4332                 $current = 'shortlog';
4333         } elsif ($current eq 'shortlog') {
4334                 $current = 'log';
4335         }
4336         $arg{'tree'}{'hash'} = $treehead if defined $treehead;
4337         $arg{'tree'}{'hash_base'} = $treebase if defined $treebase;
4338
4339         my @actions = gitweb_get_feature('actions');
4340         my %repl = (
4341                 '%' => '%',
4342                 'n' => $project,         # project name
4343                 'f' => $git_dir,         # project path within filesystem
4344                 'h' => $treehead || '',  # current hash ('h' parameter)
4345                 'b' => $treebase || '',  # hash base ('hb' parameter)
4346         );
4347         while (@actions) {
4348                 my ($label, $link, $pos) = splice(@actions,0,3);
4349                 # insert
4350                 @navs = map { $_ eq $pos ? ($_, $label) : $_ } @navs;
4351                 # munch munch
4352                 $link =~ s/%([%nfhb])/$repl{$1}/g;
4353                 $arg{$label}{'_href'} = $link;
4354         }
4355
4356         print "<div class=\"page_nav\">\n" .
4357                 (join " | ",
4358                  map { $_ eq $current ?
4359                        $_ : $cgi->a({-href => ($arg{$_}{_href} ? $arg{$_}{_href} : href(%{$arg{$_}}))}, "$_")
4360                  } @navs);
4361         print "<br/>\n$extra<br/>\n" .
4362               "</div>\n";
4363 }
4364
4365 # returns a submenu for the nagivation of the refs views (tags, heads,
4366 # remotes) with the current view disabled and the remotes view only
4367 # available if the feature is enabled
4368 sub format_ref_views {
4369         my ($current) = @_;
4370         my @ref_views = qw{tags heads};
4371         push @ref_views, 'remotes' if gitweb_check_feature('remote_heads');
4372         return join " | ", map {
4373                 $_ eq $current ? $_ :
4374                 $cgi->a({-href => href(action=>$_)}, $_)
4375         } @ref_views
4376 }
4377
4378 sub format_paging_nav {
4379         my ($action, $page, $has_next_link) = @_;
4380         my $paging_nav;
4381
4382
4383         if ($page > 0) {
4384                 $paging_nav .=
4385                         $cgi->a({-href => href(-replay=>1, page=>undef)}, "first") .
4386                         " &sdot; " .
4387                         $cgi->a({-href => href(-replay=>1, page=>$page-1),
4388                                  -accesskey => "p", -title => "Alt-p"}, "prev");
4389         } else {
4390                 $paging_nav .= "first &sdot; prev";
4391         }
4392
4393         if ($has_next_link) {
4394                 $paging_nav .= " &sdot; " .
4395                         $cgi->a({-href => href(-replay=>1, page=>$page+1),
4396                                  -accesskey => "n", -title => "Alt-n"}, "next");
4397         } else {
4398                 $paging_nav .= " &sdot; next";
4399         }
4400
4401         return $paging_nav;
4402 }
4403
4404 sub format_log_nav {
4405         my ($action, $page, $has_next_link) = @_;
4406         my $paging_nav;
4407
4408         if ($action eq 'shortlog') {
4409                 $paging_nav .= 'shortlog';
4410         } else {
4411                 $paging_nav .= $cgi->a({-href => href(action=>'shortlog', -replay=>1)}, 'shortlog');
4412         }
4413         $paging_nav .= ' | ';
4414         if ($action eq 'log') {
4415                 $paging_nav .= 'fulllog';
4416         } else {
4417                 $paging_nav .= $cgi->a({-href => href(action=>'log', -replay=>1)}, 'fulllog');
4418         }
4419
4420         $paging_nav .= " | " . format_paging_nav($action, $page, $has_next_link);
4421         return $paging_nav;
4422 }
4423
4424 ## ......................................................................
4425 ## functions printing or outputting HTML: div
4426
4427 sub git_print_header_div {
4428         my ($action, $title, $hash, $hash_base) = @_;
4429         my %args = ();
4430
4431         $args{'action'} = $action;
4432         $args{'hash'} = $hash if $hash;
4433         $args{'hash_base'} = $hash_base if $hash_base;
4434
4435         print "<div class=\"header\">\n" .
4436               $cgi->a({-href => href(%args), -class => "title"},
4437               $title ? $title : $action) .
4438               "\n</div>\n";
4439 }
4440
4441 sub format_repo_url {
4442         my ($name, $url) = @_;
4443         return "<tr class=\"metadata_url\"><td>$name</td><td>$url</td></tr>\n";
4444 }
4445
4446 # Group output by placing it in a DIV element and adding a header.
4447 # Options for start_div() can be provided by passing a hash reference as the
4448 # first parameter to the function.
4449 # Options to git_print_header_div() can be provided by passing an array
4450 # reference. This must follow the options to start_div if they are present.
4451 # The content can be a scalar, which is output as-is, a scalar reference, which
4452 # is output after html escaping, an IO handle passed either as *handle or
4453 # *handle{IO}, or a function reference. In the latter case all following
4454 # parameters will be taken as argument to the content function call.
4455 sub git_print_section {
4456         my ($div_args, $header_args, $content);
4457         my $arg = shift;
4458         if (ref($arg) eq 'HASH') {
4459                 $div_args = $arg;
4460                 $arg = shift;
4461         }
4462         if (ref($arg) eq 'ARRAY') {
4463                 $header_args = $arg;
4464                 $arg = shift;
4465         }
4466         $content = $arg;
4467
4468         print $cgi->start_div($div_args);
4469         git_print_header_div(@$header_args);
4470
4471         if (ref($content) eq 'CODE') {
4472                 $content->(@_);
4473         } elsif (ref($content) eq 'SCALAR') {
4474                 print esc_html($$content);
4475         } elsif (ref($content) eq 'GLOB' or ref($content) eq 'IO::Handle') {
4476                 print <$content>;
4477         } elsif (!ref($content) && defined($content)) {
4478                 print $content;
4479         }
4480
4481         print $cgi->end_div;
4482 }
4483
4484 sub format_timestamp_html {
4485         my $date = shift;
4486         my $strtime = $date->{'rfc2822'};
4487
4488         my (undef, undef, $datetime_class) =
4489                 gitweb_get_feature('javascript-timezone');
4490         if ($datetime_class) {
4491                 $strtime = qq!<span class="$datetime_class">$strtime</span>!;
4492         }
4493
4494         my $localtime_format = '(%02d:%02d %s)';
4495         if ($date->{'hour_local'} < 6) {
4496                 $localtime_format = '(<span class="atnight">%02d:%02d</span> %s)';
4497         }
4498         $strtime .= ' ' .
4499                     sprintf($localtime_format,
4500                             $date->{'hour_local'}, $date->{'minute_local'}, $date->{'tz_local'});
4501
4502         return $strtime;
4503 }
4504
4505 # Outputs the author name and date in long form
4506 sub git_print_authorship {
4507         my $co = shift;
4508         my %opts = @_;
4509         my $tag = $opts{-tag} || 'div';
4510         my $author = $co->{'author_name'};
4511
4512         my %ad = parse_date($co->{'author_epoch'}, $co->{'author_tz'});
4513         print "<$tag class=\"author_date\">" .
4514               format_search_author($author, "author", esc_html($author)) .
4515               " [".format_timestamp_html(\%ad)."]".
4516               git_get_avatar($co->{'author_email'}, -pad_before => 1) .
4517               "</$tag>\n";
4518 }
4519
4520 # Outputs table rows containing the full author or committer information,
4521 # in the format expected for 'commit' view (& similar).
4522 # Parameters are a commit hash reference, followed by the list of people
4523 # to output information for. If the list is empty it defaults to both
4524 # author and committer.
4525 sub git_print_authorship_rows {
4526         my $co = shift;
4527         # too bad we can't use @people = @_ || ('author', 'committer')
4528         my @people = @_;
4529         @people = ('author', 'committer') unless @people;
4530         foreach my $who (@people) {
4531                 my %wd = parse_date($co->{"${who}_epoch"}, $co->{"${who}_tz"});
4532                 print "<tr><td>$who</td><td>" .
4533                       format_search_author($co->{"${who}_name"}, $who,
4534                                            esc_html($co->{"${who}_name"})) . " " .
4535                       format_search_author($co->{"${who}_email"}, $who,
4536                                            esc_html("<" . $co->{"${who}_email"} . ">")) .
4537                       "</td><td rowspan=\"2\">" .
4538                       git_get_avatar($co->{"${who}_email"}, -size => 'double') .
4539                       "</td></tr>\n" .
4540                       "<tr>" .
4541                       "<td></td><td>" .
4542                       format_timestamp_html(\%wd) .
4543                       "</td>" .
4544                       "</tr>\n";
4545         }
4546 }
4547
4548 sub git_print_page_path {
4549         my $name = shift;
4550         my $type = shift;
4551         my $hb = shift;
4552
4553
4554         print "<div class=\"page_path\">";
4555         print $cgi->a({-href => href(action=>"tree", hash_base=>$hb),
4556                       -title => 'tree root'}, to_utf8("[$project]"));
4557         print " / ";
4558         if (defined $name) {
4559                 my @dirname = split '/', $name;
4560                 my $basename = pop @dirname;
4561                 my $fullname = '';
4562
4563                 foreach my $dir (@dirname) {
4564                         $fullname .= ($fullname ? '/' : '') . $dir;
4565                         print $cgi->a({-href => href(action=>"tree", file_name=>$fullname,
4566                                                      hash_base=>$hb),
4567                                       -title => $fullname}, esc_path($dir));
4568                         print " / ";
4569                 }
4570                 if (defined $type && $type eq 'blob') {
4571                         print $cgi->a({-href => href(action=>"blob_plain", file_name=>$file_name,
4572                                                      hash_base=>$hb),
4573                                       -title => $name}, esc_path($basename));
4574                 } elsif (defined $type && $type eq 'tree') {
4575                         print $cgi->a({-href => href(action=>"tree", file_name=>$file_name,
4576                                                      hash_base=>$hb),
4577                                       -title => $name}, esc_path($basename));
4578                         print " / ";
4579                 } else {
4580                         print esc_path($basename);
4581                 }
4582         }
4583         print "<br/></div>\n";
4584 }
4585
4586 sub git_print_log {
4587         my $log = shift;
4588         my %opts = @_;
4589
4590         if ($opts{'-remove_title'}) {
4591                 # remove title, i.e. first line of log
4592                 shift @$log;
4593         }
4594         # remove leading empty lines
4595         while (defined $log->[0] && $log->[0] eq "") {
4596                 shift @$log;
4597         }
4598
4599         # print log
4600         my $skip_blank_line = 0;
4601         foreach my $line (@$log) {
4602                 if ($line =~ m/^\s*([A-Z][-A-Za-z]*-[Bb]y|C[Cc]): /) {
4603                         if (! $opts{'-remove_signoff'}) {
4604                                 print "<span class=\"signoff\">" . esc_html($line) . "</span><br/>\n";
4605                                 $skip_blank_line = 1;
4606                         }
4607                         next;
4608                 }
4609
4610                 if ($line =~ m,\s*([a-z]*link): (https?://\S+),i) {
4611                         if (! $opts{'-remove_signoff'}) {
4612                                 print "<span class=\"signoff\">" . esc_html($1) . ": " .
4613                                         "<a href=\"" . esc_html($2) . "\">" . esc_html($2) . "</a>" .
4614                                         "</span><br/>\n";
4615                                 $skip_blank_line = 1;
4616                         }
4617                         next;
4618                 }
4619
4620                 # print only one empty line
4621                 # do not print empty line after signoff
4622                 if ($line eq "") {
4623                         next if ($skip_blank_line);
4624                         $skip_blank_line = 1;
4625                 } else {
4626                         $skip_blank_line = 0;
4627                 }
4628
4629                 print format_log_line_html($line) . "<br/>\n";
4630         }
4631
4632         if ($opts{'-final_empty_line'}) {
4633                 # end with single empty line
4634                 print "<br/>\n" unless $skip_blank_line;
4635         }
4636 }
4637
4638 # return link target (what link points to)
4639 sub git_get_link_target {
4640         my $hash = shift;
4641         my $link_target;
4642
4643         # read link
4644         open my $fd, "-|", git_cmd(), "cat-file", "blob", $hash
4645                 or return;
4646         {
4647                 local $/ = undef;
4648                 $link_target = <$fd>;
4649         }
4650         close $fd
4651                 or return;
4652
4653         return $link_target;
4654 }
4655
4656 # given link target, and the directory (basedir) the link is in,
4657 # return target of link relative to top directory (top tree);
4658 # return undef if it is not possible (including absolute links).
4659 sub normalize_link_target {
4660         my ($link_target, $basedir) = @_;
4661
4662         # absolute symlinks (beginning with '/') cannot be normalized
4663         return if (substr($link_target, 0, 1) eq '/');
4664
4665         # normalize link target to path from top (root) tree (dir)
4666         my $path;
4667         if ($basedir) {
4668                 $path = $basedir . '/' . $link_target;
4669         } else {
4670                 # we are in top (root) tree (dir)
4671                 $path = $link_target;
4672         }
4673
4674         # remove //, /./, and /../
4675         my @path_parts;
4676         foreach my $part (split('/', $path)) {
4677                 # discard '.' and ''
4678                 next if (!$part || $part eq '.');
4679                 # handle '..'
4680                 if ($part eq '..') {
4681                         if (@path_parts) {
4682                                 pop @path_parts;
4683                         } else {
4684                                 # link leads outside repository (outside top dir)
4685                                 return;
4686                         }
4687                 } else {
4688                         push @path_parts, $part;
4689                 }
4690         }
4691         $path = join('/', @path_parts);
4692
4693         return $path;
4694 }
4695
4696 # print tree entry (row of git_tree), but without encompassing <tr> element
4697 sub git_print_tree_entry {
4698         my ($t, $basedir, $hash_base, $have_blame) = @_;
4699
4700         my %base_key = ();
4701         $base_key{'hash_base'} = $hash_base if defined $hash_base;
4702
4703         # The format of a table row is: mode list link.  Where mode is
4704         # the mode of the entry, list is the name of the entry, an href,
4705         # and link is the action links of the entry.
4706
4707         print "<td class=\"mode\">" . mode_str($t->{'mode'}) . "</td>\n";
4708         if (exists $t->{'size'}) {
4709                 print "<td class=\"size\">$t->{'size'}</td>\n";
4710         }
4711         if ($t->{'type'} eq "blob") {
4712                 print "<td class=\"list\">" .
4713                         $cgi->a({-href => href(action=>"blob", hash=>$t->{'hash'},
4714                                                file_name=>"$basedir$t->{'name'}", %base_key),
4715                                 -class => "list"}, esc_path($t->{'name'}));
4716                 if (S_ISLNK(oct $t->{'mode'})) {
4717                         my $link_target = git_get_link_target($t->{'hash'});
4718                         if ($link_target) {
4719                                 my $norm_target = normalize_link_target($link_target, $basedir);
4720                                 if (defined $norm_target) {
4721                                         print " -> " .
4722                                               $cgi->a({-href => href(action=>"object", hash_base=>$hash_base,
4723                                                                      file_name=>$norm_target),
4724                                                        -title => $norm_target}, esc_path($link_target));
4725                                 } else {
4726                                         print " -> " . esc_path($link_target);
4727                                 }
4728                         }
4729                 }
4730                 print "</td>\n";
4731                 print "<td class=\"link\">";
4732                 print $cgi->a({-href => href(action=>"blob", hash=>$t->{'hash'},
4733                                              file_name=>"$basedir$t->{'name'}", %base_key)},
4734                               "blob");
4735                 if ($have_blame) {
4736                         print " | " .
4737                               $cgi->a({-href => href(action=>"blame", hash=>$t->{'hash'},
4738                                                      file_name=>"$basedir$t->{'name'}", %base_key)},
4739                                       "blame");
4740                 }
4741                 if (defined $hash_base) {
4742                         print " | " .
4743                               $cgi->a({-href => href(action=>"history", hash_base=>$hash_base,
4744                                                      hash=>$t->{'hash'}, file_name=>"$basedir$t->{'name'}")},
4745                                       "history");
4746                 }
4747                 print " | " .
4748                         $cgi->a({-href => href(action=>"blob_plain", hash_base=>$hash_base,
4749                                                file_name=>"$basedir$t->{'name'}")},
4750                                 "raw");
4751                 print "</td>\n";
4752
4753         } elsif ($t->{'type'} eq "tree") {
4754                 print "<td class=\"list\">";
4755                 print $cgi->a({-href => href(action=>"tree", hash=>$t->{'hash'},
4756                                              file_name=>"$basedir$t->{'name'}",
4757                                              %base_key)},
4758                               esc_path($t->{'name'}));
4759                 print "</td>\n";
4760                 print "<td class=\"link\">";
4761                 print $cgi->a({-href => href(action=>"tree", hash=>$t->{'hash'},
4762                                              file_name=>"$basedir$t->{'name'}",
4763                                              %base_key)},
4764                               "tree");
4765                 if (defined $hash_base) {
4766                         print " | " .
4767                               $cgi->a({-href => href(action=>"history", hash_base=>$hash_base,
4768                                                      file_name=>"$basedir$t->{'name'}")},
4769                                       "history");
4770                 }
4771                 print "</td>\n";
4772         } else {
4773                 # unknown object: we can only present history for it
4774                 # (this includes 'commit' object, i.e. submodule support)
4775                 print "<td class=\"list\">" .
4776                       esc_path($t->{'name'}) .
4777                       "</td>\n";
4778                 print "<td class=\"link\">";
4779                 if (defined $hash_base) {
4780                         print $cgi->a({-href => href(action=>"history",
4781                                                      hash_base=>$hash_base,
4782                                                      file_name=>"$basedir$t->{'name'}")},
4783                                       "history");
4784                 }
4785                 print "</td>\n";
4786         }
4787 }
4788
4789 ## ......................................................................
4790 ## functions printing large fragments of HTML
4791
4792 # get pre-image filenames for merge (combined) diff
4793 sub fill_from_file_info {
4794         my ($diff, @parents) = @_;
4795
4796         $diff->{'from_file'} = [ ];
4797         $diff->{'from_file'}[$diff->{'nparents'} - 1] = undef;
4798         for (my $i = 0; $i < $diff->{'nparents'}; $i++) {
4799                 if ($diff->{'status'}[$i] eq 'R' ||
4800                     $diff->{'status'}[$i] eq 'C') {
4801                         $diff->{'from_file'}[$i] =
4802                                 git_get_path_by_hash($parents[$i], $diff->{'from_id'}[$i]);
4803                 }
4804         }
4805
4806         return $diff;
4807 }
4808
4809 # is current raw difftree line of file deletion
4810 sub is_deleted {
4811         my $diffinfo = shift;
4812
4813         return $diffinfo->{'to_id'} eq ('0' x 40);
4814 }
4815
4816 # does patch correspond to [previous] difftree raw line
4817 # $diffinfo  - hashref of parsed raw diff format
4818 # $patchinfo - hashref of parsed patch diff format
4819 #              (the same keys as in $diffinfo)
4820 sub is_patch_split {
4821         my ($diffinfo, $patchinfo) = @_;
4822
4823         return defined $diffinfo && defined $patchinfo
4824                 && $diffinfo->{'to_file'} eq $patchinfo->{'to_file'};
4825 }
4826
4827
4828 sub git_difftree_body {
4829         my ($difftree, $hash, @parents) = @_;
4830         my ($parent) = $parents[0];
4831         my $have_blame = gitweb_check_feature('blame');
4832         print "<div class=\"list_head\">\n";
4833         if ($#{$difftree} > 10) {
4834                 print(($#{$difftree} + 1) . " files changed:\n");
4835         }
4836         print "</div>\n";
4837
4838         print "<table class=\"" .
4839               (@parents > 1 ? "combined " : "") .
4840               "diff_tree\">\n";
4841
4842         # header only for combined diff in 'commitdiff' view
4843         my $has_header = @$difftree && @parents > 1 && $action eq 'commitdiff';
4844         if ($has_header) {
4845                 # table header
4846                 print "<thead><tr>\n" .
4847                        "<th></th><th></th>\n"; # filename, patchN link
4848                 for (my $i = 0; $i < @parents; $i++) {
4849                         my $par = $parents[$i];
4850                         print "<th>" .
4851                               $cgi->a({-href => href(action=>"commitdiff",
4852                                                      hash=>$hash, hash_parent=>$par),
4853                                        -title => 'commitdiff to parent number ' .
4854                                                   ($i+1) . ': ' . substr($par,0,7)},
4855                                       $i+1) .
4856                               "&nbsp;</th>\n";
4857                 }
4858                 print "</tr></thead>\n<tbody>\n";
4859         }
4860
4861         my $alternate = 1;
4862         my $patchno = 0;
4863         foreach my $line (@{$difftree}) {
4864                 my $diff = parsed_difftree_line($line);
4865
4866                 if ($alternate) {
4867                         print "<tr class=\"dark\">\n";
4868                 } else {
4869                         print "<tr class=\"light\">\n";
4870                 }
4871                 $alternate ^= 1;
4872
4873                 if (exists $diff->{'nparents'}) { # combined diff
4874
4875                         fill_from_file_info($diff, @parents)
4876                                 unless exists $diff->{'from_file'};
4877
4878                         if (!is_deleted($diff)) {
4879                                 # file exists in the result (child) commit
4880                                 print "<td>" .
4881                                       $cgi->a({-href => href(action=>"blob", hash=>$diff->{'to_id'},
4882                                                              file_name=>$diff->{'to_file'},
4883                                                              hash_base=>$hash),
4884                                               -class => "list"}, esc_path($diff->{'to_file'})) .
4885                                       "</td>\n";
4886                         } else {
4887                                 print "<td>" .
4888                                       esc_path($diff->{'to_file'}) .
4889                                       "</td>\n";
4890                         }
4891
4892                         if ($action eq 'commitdiff') {
4893                                 # link to patch
4894                                 $patchno++;
4895                                 print "<td class=\"link\">" .
4896                                       $cgi->a({-href => href(-anchor=>"patch$patchno")},
4897                                               "patch") .
4898                                       " | " .
4899                                       "</td>\n";
4900                         }
4901
4902                         my $has_history = 0;
4903                         my $not_deleted = 0;
4904                         for (my $i = 0; $i < $diff->{'nparents'}; $i++) {
4905                                 my $hash_parent = $parents[$i];
4906                                 my $from_hash = $diff->{'from_id'}[$i];
4907                                 my $from_path = $diff->{'from_file'}[$i];
4908                                 my $status = $diff->{'status'}[$i];
4909
4910                                 $has_history ||= ($status ne 'A');
4911                                 $not_deleted ||= ($status ne 'D');
4912
4913                                 if ($status eq 'A') {
4914                                         print "<td  class=\"link\" align=\"right\"> | </td>\n";
4915                                 } elsif ($status eq 'D') {
4916                                         print "<td class=\"link\">" .
4917                                               $cgi->a({-href => href(action=>"blob",
4918                                                                      hash_base=>$hash,
4919                                                                      hash=>$from_hash,
4920                                                                      file_name=>$from_path)},
4921                                                       "blob" . ($i+1)) .
4922                                               " | </td>\n";
4923                                 } else {
4924                                         if ($diff->{'to_id'} eq $from_hash) {
4925                                                 print "<td class=\"link nochange\">";
4926                                         } else {
4927                                                 print "<td class=\"link\">";
4928                                         }
4929                                         print $cgi->a({-href => href(action=>"blobdiff",
4930                                                                      hash=>$diff->{'to_id'},
4931                                                                      hash_parent=>$from_hash,
4932                                                                      hash_base=>$hash,
4933                                                                      hash_parent_base=>$hash_parent,
4934                                                                      file_name=>$diff->{'to_file'},
4935                                                                      file_parent=>$from_path)},
4936                                                       "diff" . ($i+1)) .
4937                                               " | </td>\n";
4938                                 }
4939                         }
4940
4941                         print "<td class=\"link\">";
4942                         if ($not_deleted) {
4943                                 print $cgi->a({-href => href(action=>"blob",
4944                                                              hash=>$diff->{'to_id'},
4945                                                              file_name=>$diff->{'to_file'},
4946                                                              hash_base=>$hash)},
4947                                               "blob");
4948                                 print " | " if ($has_history);
4949                         }
4950                         if ($has_history) {
4951                                 print $cgi->a({-href => href(action=>"history",
4952                                                              file_name=>$diff->{'to_file'},
4953                                                              hash_base=>$hash)},
4954                                               "history");
4955                         }
4956                         print "</td>\n";
4957
4958                         print "</tr>\n";
4959                         next; # instead of 'else' clause, to avoid extra indent
4960                 }
4961                 # else ordinary diff
4962
4963                 my ($to_mode_oct, $to_mode_str, $to_file_type);
4964                 my ($from_mode_oct, $from_mode_str, $from_file_type);
4965                 if ($diff->{'to_mode'} ne ('0' x 6)) {
4966                         $to_mode_oct = oct $diff->{'to_mode'};
4967                         if (S_ISREG($to_mode_oct)) { # only for regular file
4968                                 $to_mode_str = sprintf("%04o", $to_mode_oct & 0777); # permission bits
4969                         }
4970                         $to_file_type = file_type($diff->{'to_mode'});
4971                 }
4972                 if ($diff->{'from_mode'} ne ('0' x 6)) {
4973                         $from_mode_oct = oct $diff->{'from_mode'};
4974                         if (S_ISREG($from_mode_oct)) { # only for regular file
4975                                 $from_mode_str = sprintf("%04o", $from_mode_oct & 0777); # permission bits
4976                         }
4977                         $from_file_type = file_type($diff->{'from_mode'});
4978                 }
4979
4980                 if ($diff->{'status'} eq "A") { # created
4981                         my $mode_chng = "<span class=\"file_status new\">[new $to_file_type";
4982                         $mode_chng   .= " with mode: $to_mode_str" if $to_mode_str;
4983                         $mode_chng   .= "]</span>";
4984                         print "<td>";
4985                         print $cgi->a({-href => href(action=>"blob", hash=>$diff->{'to_id'},
4986                                                      hash_base=>$hash, file_name=>$diff->{'file'}),
4987                                       -class => "list"}, esc_path($diff->{'file'}));
4988                         print "</td>\n";
4989                         print "<td>$mode_chng</td>\n";
4990                         print "<td class=\"link\">";
4991                         if ($action eq 'commitdiff') {
4992                                 # link to patch
4993                                 $patchno++;
4994                                 print $cgi->a({-href => href(-anchor=>"patch$patchno")},
4995                                               "patch") .
4996                                       " | ";
4997                         }
4998                         print $cgi->a({-href => href(action=>"blob", hash=>$diff->{'to_id'},
4999                                                      hash_base=>$hash, file_name=>$diff->{'file'})},
5000                                       "blob");
5001                         print "</td>\n";
5002
5003                 } elsif ($diff->{'status'} eq "D") { # deleted
5004                         my $mode_chng = "<span class=\"file_status deleted\">[deleted $from_file_type]</span>";
5005                         print "<td>";
5006                         print $cgi->a({-href => href(action=>"blob", hash=>$diff->{'from_id'},
5007                                                      hash_base=>$parent, file_name=>$diff->{'file'}),
5008                                        -class => "list"}, esc_path($diff->{'file'}));
5009                         print "</td>\n";
5010                         print "<td>$mode_chng</td>\n";
5011                         print "<td class=\"link\">";
5012                         if ($action eq 'commitdiff') {
5013                                 # link to patch
5014                                 $patchno++;
5015                                 print $cgi->a({-href => href(-anchor=>"patch$patchno")},
5016                                               "patch") .
5017                                       " | ";
5018                         }
5019                         print $cgi->a({-href => href(action=>"blob", hash=>$diff->{'from_id'},
5020                                                      hash_base=>$parent, file_name=>$diff->{'file'})},
5021                                       "blob") . " | ";
5022                         if ($have_blame) {
5023                                 print $cgi->a({-href => href(action=>"blame", hash_base=>$parent,
5024                                                              file_name=>$diff->{'file'})},
5025                                               "blame") . " | ";
5026                         }
5027                         print $cgi->a({-href => href(action=>"history", hash_base=>$parent,
5028                                                      file_name=>$diff->{'file'})},
5029                                       "history");
5030                         print "</td>\n";
5031
5032                 } elsif ($diff->{'status'} eq "M" || $diff->{'status'} eq "T") { # modified, or type changed
5033                         my $mode_chnge = "";
5034                         if ($diff->{'from_mode'} != $diff->{'to_mode'}) {
5035                                 $mode_chnge = "<span class=\"file_status mode_chnge\">[changed";
5036                                 if ($from_file_type ne $to_file_type) {
5037                                         $mode_chnge .= " from $from_file_type to $to_file_type";
5038                                 }
5039                                 if (($from_mode_oct & 0777) != ($to_mode_oct & 0777)) {
5040                                         if ($from_mode_str && $to_mode_str) {
5041                                                 $mode_chnge .= " mode: $from_mode_str->$to_mode_str";
5042                                         } elsif ($to_mode_str) {
5043                                                 $mode_chnge .= " mode: $to_mode_str";
5044                                         }
5045                                 }
5046                                 $mode_chnge .= "]</span>\n";
5047                         }
5048                         print "<td>";
5049                         print $cgi->a({-href => href(action=>"blob", hash=>$diff->{'to_id'},
5050                                                      hash_base=>$hash, file_name=>$diff->{'file'}),
5051                                       -class => "list"}, esc_path($diff->{'file'}));
5052                         print "</td>\n";
5053                         print "<td>$mode_chnge</td>\n";
5054                         print "<td class=\"link\">";
5055                         if ($action eq 'commitdiff') {
5056                                 # link to patch
5057                                 $patchno++;
5058                                 print $cgi->a({-href => href(-anchor=>"patch$patchno")},
5059                                               "patch") .
5060                                       " | ";
5061                         } elsif ($diff->{'to_id'} ne $diff->{'from_id'}) {
5062                                 # "commit" view and modified file (not onlu mode changed)
5063                                 print $cgi->a({-href => href(action=>"blobdiff",
5064                                                              hash=>$diff->{'to_id'}, hash_parent=>$diff->{'from_id'},
5065                                                              hash_base=>$hash, hash_parent_base=>$parent,
5066                                                              file_name=>$diff->{'file'})},
5067                                               "diff") .
5068                                       " | ";
5069                         }
5070                         print $cgi->a({-href => href(action=>"blob", hash=>$diff->{'to_id'},
5071                                                      hash_base=>$hash, file_name=>$diff->{'file'})},
5072                                        "blob") . " | ";
5073                         if ($have_blame) {
5074                                 print $cgi->a({-href => href(action=>"blame", hash_base=>$hash,
5075                                                              file_name=>$diff->{'file'})},
5076                                               "blame") . " | ";
5077                         }
5078                         print $cgi->a({-href => href(action=>"history", hash_base=>$hash,
5079                                                      file_name=>$diff->{'file'})},
5080                                       "history");
5081                         print "</td>\n";
5082
5083                 } elsif ($diff->{'status'} eq "R" || $diff->{'status'} eq "C") { # renamed or copied
5084                         my %status_name = ('R' => 'moved', 'C' => 'copied');
5085                         my $nstatus = $status_name{$diff->{'status'}};
5086                         my $mode_chng = "";
5087                         if ($diff->{'from_mode'} != $diff->{'to_mode'}) {
5088                                 # mode also for directories, so we cannot use $to_mode_str
5089                                 $mode_chng = sprintf(", mode: %04o", $to_mode_oct & 0777);
5090                         }
5091                         print "<td>" .
5092                               $cgi->a({-href => href(action=>"blob", hash_base=>$hash,
5093                                                      hash=>$diff->{'to_id'}, file_name=>$diff->{'to_file'}),
5094                                       -class => "list"}, esc_path($diff->{'to_file'})) . "</td>\n" .
5095                               "<td><span class=\"file_status $nstatus\">[$nstatus from " .
5096                               $cgi->a({-href => href(action=>"blob", hash_base=>$parent,
5097                                                      hash=>$diff->{'from_id'}, file_name=>$diff->{'from_file'}),
5098                                       -class => "list"}, esc_path($diff->{'from_file'})) .
5099                               " with " . (int $diff->{'similarity'}) . "% similarity$mode_chng]</span></td>\n" .
5100                               "<td class=\"link\">";
5101                         if ($action eq 'commitdiff') {
5102                                 # link to patch
5103                                 $patchno++;
5104                                 print $cgi->a({-href => href(-anchor=>"patch$patchno")},
5105                                               "patch") .
5106                                       " | ";
5107                         } elsif ($diff->{'to_id'} ne $diff->{'from_id'}) {
5108                                 # "commit" view and modified file (not only pure rename or copy)
5109                                 print $cgi->a({-href => href(action=>"blobdiff",
5110                                                              hash=>$diff->{'to_id'}, hash_parent=>$diff->{'from_id'},
5111                                                              hash_base=>$hash, hash_parent_base=>$parent,
5112                                                              file_name=>$diff->{'to_file'}, file_parent=>$diff->{'from_file'})},
5113                                               "diff") .
5114                                       " | ";
5115                         }
5116                         print $cgi->a({-href => href(action=>"blob", hash=>$diff->{'to_id'},
5117                                                      hash_base=>$parent, file_name=>$diff->{'to_file'})},
5118                                       "blob") . " | ";
5119                         if ($have_blame) {
5120                                 print $cgi->a({-href => href(action=>"blame", hash_base=>$hash,
5121                                                              file_name=>$diff->{'to_file'})},
5122                                               "blame") . " | ";
5123                         }
5124                         print $cgi->a({-href => href(action=>"history", hash_base=>$hash,
5125                                                     file_name=>$diff->{'to_file'})},
5126                                       "history");
5127                         print "</td>\n";
5128
5129                 } # we should not encounter Unmerged (U) or Unknown (X) status
5130                 print "</tr>\n";
5131         }
5132         print "</tbody>" if $has_header;
5133         print "</table>\n";
5134 }
5135
5136 # Print context lines and then rem/add lines in a side-by-side manner.
5137 sub print_sidebyside_diff_lines {
5138         my ($ctx, $rem, $add) = @_;
5139
5140         # print context block before add/rem block
5141         if (@$ctx) {
5142                 print join '',
5143                         '<div class="chunk_block ctx">',
5144                                 '<div class="old">',
5145                                 @$ctx,
5146                                 '</div>',
5147                                 '<div class="new">',
5148                                 @$ctx,
5149                                 '</div>',
5150                         '</div>';
5151         }
5152
5153         if (!@$add) {
5154                 # pure removal
5155                 print join '',
5156                         '<div class="chunk_block rem">',
5157                                 '<div class="old">',
5158                                 @$rem,
5159                                 '</div>',
5160                         '</div>';
5161         } elsif (!@$rem) {
5162                 # pure addition
5163                 print join '',
5164                         '<div class="chunk_block add">',
5165                                 '<div class="new">',
5166                                 @$add,
5167                                 '</div>',
5168                         '</div>';
5169         } else {
5170                 print join '',
5171                         '<div class="chunk_block chg">',
5172                                 '<div class="old">',
5173                                 @$rem,
5174                                 '</div>',
5175                                 '<div class="new">',
5176                                 @$add,
5177                                 '</div>',
5178                         '</div>';
5179         }
5180 }
5181
5182 # Print context lines and then rem/add lines in inline manner.
5183 sub print_inline_diff_lines {
5184         my ($ctx, $rem, $add) = @_;
5185
5186         print @$ctx, @$rem, @$add;
5187 }
5188
5189 # Format removed and added line, mark changed part and HTML-format them.
5190 # Implementation is based on contrib/diff-highlight
5191 sub format_rem_add_lines_pair {
5192         my ($rem, $add, $num_parents) = @_;
5193
5194         # We need to untabify lines before split()'ing them;
5195         # otherwise offsets would be invalid.
5196         chomp $rem;
5197         chomp $add;
5198         $rem = untabify($rem);
5199         $add = untabify($add);
5200
5201         my @rem = split(//, $rem);
5202         my @add = split(//, $add);
5203         my ($esc_rem, $esc_add);
5204         # Ignore leading +/- characters for each parent.
5205         my ($prefix_len, $suffix_len) = ($num_parents, 0);
5206         my ($prefix_has_nonspace, $suffix_has_nonspace);
5207
5208         my $shorter = (@rem < @add) ? @rem : @add;
5209         while ($prefix_len < $shorter) {
5210                 last if ($rem[$prefix_len] ne $add[$prefix_len]);
5211
5212                 $prefix_has_nonspace = 1 if ($rem[$prefix_len] !~ /\s/);
5213                 $prefix_len++;
5214         }
5215
5216         while ($prefix_len + $suffix_len < $shorter) {
5217                 last if ($rem[-1 - $suffix_len] ne $add[-1 - $suffix_len]);
5218
5219                 $suffix_has_nonspace = 1 if ($rem[-1 - $suffix_len] !~ /\s/);
5220                 $suffix_len++;
5221         }
5222
5223         # Mark lines that are different from each other, but have some common
5224         # part that isn't whitespace.  If lines are completely different, don't
5225         # mark them because that would make output unreadable, especially if
5226         # diff consists of multiple lines.
5227         if ($prefix_has_nonspace || $suffix_has_nonspace) {
5228                 $esc_rem = esc_html_hl_regions($rem, 'marked',
5229                         [$prefix_len, @rem - $suffix_len], -nbsp=>1);
5230                 $esc_add = esc_html_hl_regions($add, 'marked',
5231                         [$prefix_len, @add - $suffix_len], -nbsp=>1);
5232         } else {
5233                 $esc_rem = esc_html($rem, -nbsp=>1);
5234                 $esc_add = esc_html($add, -nbsp=>1);
5235         }
5236
5237         return format_diff_line(\$esc_rem, 'rem'),
5238                format_diff_line(\$esc_add, 'add');
5239 }
5240
5241 # HTML-format diff context, removed and added lines.
5242 sub format_ctx_rem_add_lines {
5243         my ($ctx, $rem, $add, $num_parents) = @_;
5244         my (@new_ctx, @new_rem, @new_add);
5245         my $can_highlight = 0;
5246         my $is_combined = ($num_parents > 1);
5247
5248         # Highlight if every removed line has a corresponding added line.
5249         if (@$add > 0 && @$add == @$rem) {
5250                 $can_highlight = 1;
5251
5252                 # Highlight lines in combined diff only if the chunk contains
5253                 # diff between the same version, e.g.
5254                 #
5255                 #    - a
5256                 #   -  b
5257                 #    + c
5258                 #   +  d
5259                 #
5260                 # Otherwise the highlightling would be confusing.
5261                 if ($is_combined) {
5262                         for (my $i = 0; $i < @$add; $i++) {
5263                                 my $prefix_rem = substr($rem->[$i], 0, $num_parents);
5264                                 my $prefix_add = substr($add->[$i], 0, $num_parents);
5265
5266                                 $prefix_rem =~ s/-/+/g;
5267
5268                                 if ($prefix_rem ne $prefix_add) {
5269                                         $can_highlight = 0;
5270                                         last;
5271                                 }
5272                         }
5273                 }
5274         }
5275
5276         if ($can_highlight) {
5277                 for (my $i = 0; $i < @$add; $i++) {
5278                         my ($line_rem, $line_add) = format_rem_add_lines_pair(
5279                                 $rem->[$i], $add->[$i], $num_parents);
5280                         push @new_rem, $line_rem;
5281                         push @new_add, $line_add;
5282                 }
5283         } else {
5284                 @new_rem = map { format_diff_line($_, 'rem') } @$rem;
5285                 @new_add = map { format_diff_line($_, 'add') } @$add;
5286         }
5287
5288         @new_ctx = map { format_diff_line($_, 'ctx') } @$ctx;
5289
5290         return (\@new_ctx, \@new_rem, \@new_add);
5291 }
5292
5293 # Print context lines and then rem/add lines.
5294 sub print_diff_lines {
5295         my ($ctx, $rem, $add, $diff_style, $num_parents) = @_;
5296         my $is_combined = $num_parents > 1;
5297
5298         ($ctx, $rem, $add) = format_ctx_rem_add_lines($ctx, $rem, $add,
5299                 $num_parents);
5300
5301         if ($diff_style eq 'sidebyside' && !$is_combined) {
5302                 print_sidebyside_diff_lines($ctx, $rem, $add);
5303         } else {
5304                 # default 'inline' style and unknown styles
5305                 print_inline_diff_lines($ctx, $rem, $add);
5306         }
5307 }
5308
5309 sub print_diff_chunk {
5310         my ($diff_style, $num_parents, $from, $to, @chunk) = @_;
5311         my (@ctx, @rem, @add);
5312
5313         # The class of the previous line.
5314         my $prev_class = '';
5315
5316         return unless @chunk;
5317
5318         # incomplete last line might be among removed or added lines,
5319         # or both, or among context lines: find which
5320         for (my $i = 1; $i < @chunk; $i++) {
5321                 if ($chunk[$i][0] eq 'incomplete') {
5322                         $chunk[$i][0] = $chunk[$i-1][0];
5323                 }
5324         }
5325
5326         # guardian
5327         push @chunk, ["", ""];
5328
5329         foreach my $line_info (@chunk) {
5330                 my ($class, $line) = @$line_info;
5331
5332                 # print chunk headers
5333                 if ($class && $class eq 'chunk_header') {
5334                         print format_diff_line($line, $class, $from, $to);
5335                         next;
5336                 }
5337
5338                 ## print from accumulator when have some add/rem lines or end
5339                 # of chunk (flush context lines), or when have add and rem
5340                 # lines and new block is reached (otherwise add/rem lines could
5341                 # be reordered)
5342                 if (!$class || ((@rem || @add) && $class eq 'ctx') ||
5343                     (@rem && @add && $class ne $prev_class)) {
5344                         print_diff_lines(\@ctx, \@rem, \@add,
5345                                          $diff_style, $num_parents);
5346                         @ctx = @rem = @add = ();
5347                 }
5348
5349                 ## adding lines to accumulator
5350                 # guardian value
5351                 last unless $line;
5352                 # rem, add or change
5353                 if ($class eq 'rem') {
5354                         push @rem, $line;
5355                 } elsif ($class eq 'add') {
5356                         push @add, $line;
5357                 }
5358                 # context line
5359                 if ($class eq 'ctx') {
5360                         push @ctx, $line;
5361                 }
5362
5363                 $prev_class = $class;
5364         }
5365 }
5366
5367 sub git_patchset_body {
5368         my ($fd, $diff_style, $difftree, $hash, @hash_parents) = @_;
5369         my ($hash_parent) = $hash_parents[0];
5370
5371         my $is_combined = (@hash_parents > 1);
5372         my $patch_idx = 0;
5373         my $patch_number = 0;
5374         my $patch_line;
5375         my $diffinfo;
5376         my $to_name;
5377         my (%from, %to);
5378         my @chunk; # for side-by-side diff
5379
5380         print "<div class=\"patchset\">\n";
5381
5382         # skip to first patch
5383         while ($patch_line = <$fd>) {
5384                 chomp $patch_line;
5385
5386                 last if ($patch_line =~ m/^diff /);
5387         }
5388
5389  PATCH:
5390         while ($patch_line) {
5391
5392                 # parse "git diff" header line
5393                 if ($patch_line =~ m/^diff --git (\"(?:[^\\\"]*(?:\\.[^\\\"]*)*)\"|[^ "]*) (.*)$/) {
5394                         # $1 is from_name, which we do not use
5395                         $to_name = unquote($2);
5396                         $to_name =~ s!^b/!!;
5397                 } elsif ($patch_line =~ m/^diff --(cc|combined) ("?.*"?)$/) {
5398                         # $1 is 'cc' or 'combined', which we do not use
5399                         $to_name = unquote($2);
5400                 } else {
5401                         $to_name = undef;
5402                 }
5403
5404                 # check if current patch belong to current raw line
5405                 # and parse raw git-diff line if needed
5406                 if (is_patch_split($diffinfo, { 'to_file' => $to_name })) {
5407                         # this is continuation of a split patch
5408                         print "<div class=\"patch cont\">\n";
5409                 } else {
5410                         # advance raw git-diff output if needed
5411                         $patch_idx++ if defined $diffinfo;
5412
5413                         # read and prepare patch information
5414                         $diffinfo = parsed_difftree_line($difftree->[$patch_idx]);
5415
5416                         # compact combined diff output can have some patches skipped
5417                         # find which patch (using pathname of result) we are at now;
5418                         if ($is_combined) {
5419                                 while ($to_name ne $diffinfo->{'to_file'}) {
5420                                         print "<div class=\"patch\" id=\"patch". ($patch_idx+1) ."\">\n" .
5421                                               format_diff_cc_simplified($diffinfo, @hash_parents) .
5422                                               "</div>\n";  # class="patch"
5423
5424                                         $patch_idx++;
5425                                         $patch_number++;
5426
5427                                         last if $patch_idx > $#$difftree;
5428                                         $diffinfo = parsed_difftree_line($difftree->[$patch_idx]);
5429                                 }
5430                         }
5431
5432                         # modifies %from, %to hashes
5433                         parse_from_to_diffinfo($diffinfo, \%from, \%to, @hash_parents);
5434
5435                         # this is first patch for raw difftree line with $patch_idx index
5436                         # we index @$difftree array from 0, but number patches from 1
5437                         print "<div class=\"patch\" id=\"patch". ($patch_idx+1) ."\">\n";
5438                 }
5439
5440                 # git diff header
5441                 #assert($patch_line =~ m/^diff /) if DEBUG;
5442                 #assert($patch_line !~ m!$/$!) if DEBUG; # is chomp-ed
5443                 $patch_number++;
5444                 # print "git diff" header
5445                 print format_git_diff_header_line($patch_line, $diffinfo,
5446                                                   \%from, \%to);
5447
5448                 # print extended diff header
5449                 print "<div class=\"diff extended_header\">\n";
5450         EXTENDED_HEADER:
5451                 while ($patch_line = <$fd>) {
5452                         chomp $patch_line;
5453
5454                         last EXTENDED_HEADER if ($patch_line =~ m/^--- |^diff /);
5455
5456                         print format_extended_diff_header_line($patch_line, $diffinfo,
5457                                                                \%from, \%to);
5458                 }
5459                 print "</div>\n"; # class="diff extended_header"
5460
5461                 # from-file/to-file diff header
5462                 if (! $patch_line) {
5463                         print "</div>\n"; # class="patch"
5464                         last PATCH;
5465                 }
5466                 next PATCH if ($patch_line =~ m/^diff /);
5467                 #assert($patch_line =~ m/^---/) if DEBUG;
5468
5469                 my $last_patch_line = $patch_line;
5470                 $patch_line = <$fd>;
5471                 chomp $patch_line;
5472                 #assert($patch_line =~ m/^\+\+\+/) if DEBUG;
5473
5474                 print format_diff_from_to_header($last_patch_line, $patch_line,
5475                                                  $diffinfo, \%from, \%to,
5476                                                  @hash_parents);
5477
5478                 # the patch itself
5479         LINE:
5480                 while ($patch_line = <$fd>) {
5481                         chomp $patch_line;
5482
5483                         next PATCH if ($patch_line =~ m/^diff /);
5484
5485                         my $class = diff_line_class($patch_line, \%from, \%to);
5486
5487                         if ($class eq 'chunk_header') {
5488                                 print_diff_chunk($diff_style, scalar @hash_parents, \%from, \%to, @chunk);
5489                                 @chunk = ();
5490                         }
5491
5492                         push @chunk, [ $class, $patch_line ];
5493                 }
5494
5495         } continue {
5496                 if (@chunk) {
5497                         print_diff_chunk($diff_style, scalar @hash_parents, \%from, \%to, @chunk);
5498                         @chunk = ();
5499                 }
5500                 print "</div>\n"; # class="patch"
5501         }
5502
5503         # for compact combined (--cc) format, with chunk and patch simplification
5504         # the patchset might be empty, but there might be unprocessed raw lines
5505         for (++$patch_idx if $patch_number > 0;
5506              $patch_idx < @$difftree;
5507              ++$patch_idx) {
5508                 # read and prepare patch information
5509                 $diffinfo = parsed_difftree_line($difftree->[$patch_idx]);
5510
5511                 # generate anchor for "patch" links in difftree / whatchanged part
5512                 print "<div class=\"patch\" id=\"patch". ($patch_idx+1) ."\">\n" .
5513                       format_diff_cc_simplified($diffinfo, @hash_parents) .
5514                       "</div>\n";  # class="patch"
5515
5516                 $patch_number++;
5517         }
5518
5519         if ($patch_number == 0) {
5520                 if (@hash_parents > 1) {
5521                         print "<div class=\"diff nodifferences\">Trivial merge</div>\n";
5522                 } else {
5523                         print "<div class=\"diff nodifferences\">No differences found</div>\n";
5524                 }
5525         }
5526
5527         print "</div>\n"; # class="patchset"
5528 }
5529
5530 # . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
5531
5532 sub git_project_search_form {
5533         my ($searchtext, $search_use_regexp) = @_;
5534
5535         my $limit = '';
5536         if ($project_filter) {
5537                 $limit = " in '$project_filter/'";
5538         }
5539
5540         print "<div class=\"projsearch\">\n";
5541         print $cgi->start_form(-method => 'get', -action => $my_uri) .
5542               $cgi->hidden(-name => 'a', -value => 'project_list')  . "\n";
5543         print $cgi->hidden(-name => 'pf', -value => $project_filter). "\n"
5544                 if (defined $project_filter);
5545         print $cgi->textfield(-name => 's', -value => $searchtext,
5546                               -title => "Search project by name and description$limit",
5547                               -size => 60) . "\n" .
5548               "<span title=\"Extended regular expression\">" .
5549               $cgi->checkbox(-name => 'sr', -value => 1, -label => 're',
5550                              -checked => $search_use_regexp) .
5551               "</span>\n" .
5552               $cgi->submit(-name => 'btnS', -value => 'Search') .
5553               $cgi->end_form() . "\n" .
5554               $cgi->a({-href => href(project => undef, searchtext => undef,
5555                                      project_filter => $project_filter)},
5556                       esc_html("List all projects$limit")) . "<br />\n";
5557         print "</div>\n";
5558 }
5559
5560 # entry for given @keys needs filling if at least one of keys in list
5561 # is not present in %$project_info
5562 sub project_info_needs_filling {
5563         my ($project_info, @keys) = @_;
5564
5565         # return List::MoreUtils::any { !exists $project_info->{$_} } @keys;
5566         foreach my $key (@keys) {
5567                 if (!exists $project_info->{$key}) {
5568                         return 1;
5569                 }
5570         }
5571         return;
5572 }
5573
5574 # fills project list info (age, description, owner, category, forks, etc.)
5575 # for each project in the list, removing invalid projects from
5576 # returned list, or fill only specified info.
5577 #
5578 # Invalid projects are removed from the returned list if and only if you
5579 # ask 'age' or 'age_string' to be filled, because they are the only fields
5580 # that run unconditionally git command that requires repository, and
5581 # therefore do always check if project repository is invalid.
5582 #
5583 # USAGE:
5584 # * fill_project_list_info(\@project_list, 'descr_long', 'ctags')
5585 #   ensures that 'descr_long' and 'ctags' fields are filled
5586 # * @project_list = fill_project_list_info(\@project_list)
5587 #   ensures that all fields are filled (and invalid projects removed)
5588 #
5589 # NOTE: modifies $projlist, but does not remove entries from it
5590 sub fill_project_list_info {
5591         my ($projlist, @wanted_keys) = @_;
5592         my @projects;
5593         my $filter_set = sub { return @_; };
5594         if (@wanted_keys) {
5595                 my %wanted_keys = map { $_ => 1 } @wanted_keys;
5596                 $filter_set = sub { return grep { $wanted_keys{$_} } @_; };
5597         }
5598
5599         my $show_ctags = gitweb_check_feature('ctags');
5600  PROJECT:
5601         foreach my $pr (@$projlist) {
5602                 if (project_info_needs_filling($pr, $filter_set->('age', 'age_string'))) {
5603                         my (@activity) = git_get_last_activity($pr->{'path'});
5604                         unless (@activity) {
5605                                 next PROJECT;
5606                         }
5607                         ($pr->{'age'}, $pr->{'age_string'}) = @activity;
5608                 }
5609                 if (project_info_needs_filling($pr, $filter_set->('descr', 'descr_long'))) {
5610                         my $descr = git_get_project_description($pr->{'path'}) || "";
5611                         $descr = to_utf8($descr);
5612                         $pr->{'descr_long'} = $descr;
5613                         $pr->{'descr'} = chop_str($descr, $projects_list_description_width, 5);
5614                 }
5615                 if (project_info_needs_filling($pr, $filter_set->('owner'))) {
5616                         $pr->{'owner'} = git_get_project_owner("$pr->{'path'}") || "";
5617                 }
5618                 if ($show_ctags &&
5619                     project_info_needs_filling($pr, $filter_set->('ctags'))) {
5620                         $pr->{'ctags'} = git_get_project_ctags($pr->{'path'});
5621                 }
5622                 if ($projects_list_group_categories &&
5623                     project_info_needs_filling($pr, $filter_set->('category'))) {
5624                         my $cat = git_get_project_category($pr->{'path'}) ||
5625                                                            $project_list_default_category;
5626                         $pr->{'category'} = to_utf8($cat);
5627                 }
5628
5629                 push @projects, $pr;
5630         }
5631
5632         return @projects;
5633 }
5634
5635 sub sort_projects_list {
5636         my ($projlist, $order) = @_;
5637
5638         sub order_str {
5639                 my $key = shift;
5640                 return sub { $a->{$key} cmp $b->{$key} };
5641         }
5642
5643         sub order_num_then_undef {
5644                 my $key = shift;
5645                 return sub {
5646                         defined $a->{$key} ?
5647                                 (defined $b->{$key} ? $a->{$key} <=> $b->{$key} : -1) :
5648                                 (defined $b->{$key} ? 1 : 0)
5649                 };
5650         }
5651
5652         my %orderings = (
5653                 project => order_str('path'),
5654                 descr => order_str('descr_long'),
5655                 owner => order_str('owner'),
5656                 age => order_num_then_undef('age'),
5657         );
5658
5659         my $ordering = $orderings{$order};
5660         return defined $ordering ? sort $ordering @$projlist : @$projlist;
5661 }
5662
5663 # returns a hash of categories, containing the list of project
5664 # belonging to each category
5665 sub build_projlist_by_category {
5666         my ($projlist, $from, $to) = @_;
5667         my %categories;
5668
5669         $from = 0 unless defined $from;
5670         $to = $#$projlist if (!defined $to || $#$projlist < $to);
5671
5672         for (my $i = $from; $i <= $to; $i++) {
5673                 my $pr = $projlist->[$i];
5674                 push @{$categories{ $pr->{'category'} }}, $pr;
5675         }
5676
5677         return wantarray ? %categories : \%categories;
5678 }
5679
5680 # print 'sort by' <th> element, generating 'sort by $name' replay link
5681 # if that order is not selected
5682 sub print_sort_th {
5683         print format_sort_th(@_);
5684 }
5685
5686 sub format_sort_th {
5687         my ($name, $order, $header) = @_;
5688         my $sort_th = "";
5689         $header ||= ucfirst($name);
5690
5691         if ($order eq $name) {
5692                 $sort_th .= "<th>$header</th>\n";
5693         } else {
5694                 $sort_th .= "<th>" .
5695                             $cgi->a({-href => href(-replay=>1, order=>$name),
5696                                      -class => "header"}, $header) .
5697                             "</th>\n";
5698         }
5699
5700         return $sort_th;
5701 }
5702
5703 sub git_project_list_rows {
5704         my ($projlist, $from, $to, $check_forks) = @_;
5705
5706         $from = 0 unless defined $from;
5707         $to = $#$projlist if (!defined $to || $#$projlist < $to);
5708
5709         my $alternate = 1;
5710         for (my $i = $from; $i <= $to; $i++) {
5711                 my $pr = $projlist->[$i];
5712
5713                 if ($alternate) {
5714                         print "<tr class=\"dark\">\n";
5715                 } else {
5716                         print "<tr class=\"light\">\n";
5717                 }
5718                 $alternate ^= 1;
5719
5720                 if ($check_forks) {
5721                         print "<td>";
5722                         if ($pr->{'forks'}) {
5723                                 my $nforks = scalar @{$pr->{'forks'}};
5724                                 if ($nforks > 0) {
5725                                         print $cgi->a({-href => href(project=>$pr->{'path'}, action=>"forks"),
5726                                                        -title => "$nforks forks"}, "+");
5727                                 } else {
5728                                         print $cgi->span({-title => "$nforks forks"}, "+");
5729                                 }
5730                         }
5731                         print "</td>\n";
5732                 }
5733                 print "<td>" . $cgi->a({-href => href(project=>$pr->{'path'}, action=>"summary"),
5734                                         -class => "list"},
5735                                        esc_html_match_hl($pr->{'path'}, $search_regexp)) .
5736                       "</td>\n" .
5737                       "<td>" . $cgi->a({-href => href(project=>$pr->{'path'}, action=>"summary"),
5738                                         -class => "list",
5739                                         -title => $pr->{'descr_long'}},
5740                                         $search_regexp
5741                                         ? esc_html_match_hl_chopped($pr->{'descr_long'},
5742                                                                     $pr->{'descr'}, $search_regexp)
5743                                         : esc_html($pr->{'descr'})) .
5744                       "</td>\n";
5745                 unless ($omit_owner) {
5746                         print "<td><i>" . chop_and_escape_str($pr->{'owner'}, 15) . "</i></td>\n";
5747                 }
5748                 unless ($omit_age_column) {
5749                         print "<td class=\"". age_class($pr->{'age'}) . "\">" .
5750                             (defined $pr->{'age_string'} ? $pr->{'age_string'} : "No commits") . "</td>\n";
5751                 }
5752                 print"<td class=\"link\">" .
5753                       $cgi->a({-href => href(project=>$pr->{'path'}, action=>"summary")}, "summary")   . " | " .
5754                       $cgi->a({-href => href(project=>$pr->{'path'}, action=>"shortlog")}, "log") . " | " .
5755                       $cgi->a({-href => href(project=>$pr->{'path'}, action=>"tree")}, "tree") .
5756                       ($pr->{'forks'} ? " | " . $cgi->a({-href => href(project=>$pr->{'path'}, action=>"forks")}, "forks") : '') .
5757                       "</td>\n" .
5758                       "</tr>\n";
5759         }
5760 }
5761
5762 sub git_project_list_body {
5763         # actually uses global variable $project
5764         my ($projlist, $order, $from, $to, $extra, $no_header) = @_;
5765         my @projects = @$projlist;
5766
5767         my $check_forks = gitweb_check_feature('forks');
5768         my $show_ctags  = gitweb_check_feature('ctags');
5769         my $tagfilter = $show_ctags ? $input_params{'ctag'} : undef;
5770         $check_forks = undef
5771                 if ($tagfilter || $search_regexp);
5772
5773         # filtering out forks before filling info allows to do less work
5774         @projects = filter_forks_from_projects_list(\@projects)
5775                 if ($check_forks);
5776         # search_projects_list pre-fills required info
5777         @projects = search_projects_list(\@projects,
5778                                          'search_regexp' => $search_regexp,
5779                                          'tagfilter'  => $tagfilter)
5780                 if ($tagfilter || $search_regexp);
5781         # fill the rest
5782         my @all_fields = ('descr', 'descr_long', 'ctags', 'category');
5783         push @all_fields, ('age', 'age_string') unless($omit_age_column);
5784         push @all_fields, 'owner' unless($omit_owner);
5785         @projects = fill_project_list_info(\@projects, @all_fields);
5786
5787         $order ||= $default_projects_order;
5788         $from = 0 unless defined $from;
5789         $to = $#projects if (!defined $to || $#projects < $to);
5790
5791         # short circuit
5792         if ($from > $to) {
5793                 print "<center>\n".
5794                       "<b>No such projects found</b><br />\n".
5795                       "Click ".$cgi->a({-href=>href(project=>undef)},"here")." to view all projects<br />\n".
5796                       "</center>\n<br />\n";
5797                 return;
5798         }
5799
5800         @projects = sort_projects_list(\@projects, $order);
5801
5802         if ($show_ctags) {
5803                 my $ctags = git_gather_all_ctags(\@projects);
5804                 my $cloud = git_populate_project_tagcloud($ctags);
5805                 print git_show_project_tagcloud($cloud, 64);
5806         }
5807
5808         print "<table class=\"project_list\">\n";
5809         unless ($no_header) {
5810                 print "<tr>\n";
5811                 if ($check_forks) {
5812                         print "<th></th>\n";
5813                 }
5814                 print_sort_th('project', $order, 'Project');
5815                 print_sort_th('descr', $order, 'Description');
5816                 print_sort_th('owner', $order, 'Owner') unless $omit_owner;
5817                 print_sort_th('age', $order, 'Last Change') unless $omit_age_column;
5818                 print "<th></th>\n" . # for links
5819                       "</tr>\n";
5820         }
5821
5822         if ($projects_list_group_categories) {
5823                 # only display categories with projects in the $from-$to window
5824                 @projects = sort {$a->{'category'} cmp $b->{'category'}} @projects[$from..$to];
5825                 my %categories = build_projlist_by_category(\@projects, $from, $to);
5826                 foreach my $cat (sort keys %categories) {
5827                         unless ($cat eq "") {
5828                                 print "<tr>\n";
5829                                 if ($check_forks) {
5830                                         print "<td></td>\n";
5831                                 }
5832                                 print "<td class=\"category\" colspan=\"5\">".esc_html($cat)."</td>\n";
5833                                 print "</tr>\n";
5834                         }
5835
5836                         git_project_list_rows($categories{$cat}, undef, undef, $check_forks);
5837                 }
5838         } else {
5839                 git_project_list_rows(\@projects, $from, $to, $check_forks);
5840         }
5841
5842         if (defined $extra) {
5843                 print "<tr>\n";
5844                 if ($check_forks) {
5845                         print "<td></td>\n";
5846                 }
5847                 print "<td colspan=\"5\">$extra</td>\n" .
5848                       "</tr>\n";
5849         }
5850         print "</table>\n";
5851 }
5852
5853 sub git_log_body {
5854         # uses global variable $project
5855         my ($commitlist, $from, $to, $refs, $extra) = @_;
5856
5857         $from = 0 unless defined $from;
5858         $to = $#{$commitlist} if (!defined $to || $#{$commitlist} < $to);
5859
5860         for (my $i = 0; $i <= $to; $i++) {
5861                 my %co = %{$commitlist->[$i]};
5862                 next if !%co;
5863                 my $commit = $co{'id'};
5864                 my $ref = format_ref_marker($refs, $commit);
5865                 git_print_header_div('commit',
5866                                "<span class=\"age\">$co{'age_string'}</span>" .
5867                                esc_html($co{'title'}) . $ref,
5868                                $commit);
5869                 print "<div class=\"title_text\">\n" .
5870                       "<div class=\"log_link\">\n" .
5871                       $cgi->a({-href => href(action=>"commit", hash=>$commit)}, "commit") .
5872                       " | " .
5873                       $cgi->a({-href => href(action=>"commitdiff", hash=>$commit)}, "commitdiff") .
5874                       " | " .
5875                       $cgi->a({-href => href(action=>"tree", hash=>$commit, hash_base=>$commit)}, "tree") .
5876                       "<br/>\n" .
5877                       "</div>\n";
5878                       git_print_authorship(\%co, -tag => 'span');
5879                       print "<br/>\n</div>\n";
5880
5881                 print "<div class=\"log_body\">\n";
5882                 git_print_log($co{'comment'}, -final_empty_line=> 1);
5883                 print "</div>\n";
5884         }
5885         if ($extra) {
5886                 print "<div class=\"page_nav\">\n";
5887                 print "$extra\n";
5888                 print "</div>\n";
5889         }
5890 }
5891
5892 sub git_shortlog_body {
5893         # uses global variable $project
5894         my ($commitlist, $from, $to, $refs, $extra) = @_;
5895
5896         $from = 0 unless defined $from;
5897         $to = $#{$commitlist} if (!defined $to || $#{$commitlist} < $to);
5898
5899         print "<table class=\"shortlog\">\n";
5900         my $alternate = 1;
5901         for (my $i = $from; $i <= $to; $i++) {
5902                 my %co = %{$commitlist->[$i]};
5903                 my $commit = $co{'id'};
5904                 my $ref = format_ref_marker($refs, $commit);
5905                 if ($alternate) {
5906                         print "<tr class=\"dark\">\n";
5907                 } else {
5908                         print "<tr class=\"light\">\n";
5909                 }
5910                 $alternate ^= 1;
5911                 # git_summary() used print "<td><i>$co{'age_string'}</i></td>\n" .
5912                 print "<td title=\"$co{'age_string_age'}\"><i>$co{'age_string_date'}</i></td>\n" .
5913                       format_author_html('td', \%co, 10) . "<td>";
5914                 print format_subject_html($co{'title'}, $co{'title_short'},
5915                                           href(action=>"commit", hash=>$commit), $ref);
5916                 print "</td>\n" .
5917                       "<td class=\"link\">" .
5918                       $cgi->a({-href => href(action=>"commit", hash=>$commit)}, "commit") . " | " .
5919                       $cgi->a({-href => href(action=>"commitdiff", hash=>$commit)}, "commitdiff") . " | " .
5920                       $cgi->a({-href => href(action=>"tree", hash=>$commit, hash_base=>$commit)}, "tree");
5921                 my $snapshot_links = format_snapshot_links($commit);
5922                 if (defined $snapshot_links) {
5923                         print " | " . $snapshot_links;
5924                 }
5925                 print "</td>\n" .
5926                       "</tr>\n";
5927         }
5928         if (defined $extra) {
5929                 print "<tr>\n" .
5930                       "<td colspan=\"4\">$extra</td>\n" .
5931                       "</tr>\n";
5932         }
5933         print "</table>\n";
5934 }
5935
5936 sub git_history_body {
5937         # Warning: assumes constant type (blob or tree) during history
5938         my ($commitlist, $from, $to, $refs, $extra,
5939             $file_name, $file_hash, $ftype) = @_;
5940
5941         $from = 0 unless defined $from;
5942         $to = $#{$commitlist} unless (defined $to && $to <= $#{$commitlist});
5943
5944         print "<table class=\"history\">\n";
5945         my $alternate = 1;
5946         for (my $i = $from; $i <= $to; $i++) {
5947                 my %co = %{$commitlist->[$i]};
5948                 if (!%co) {
5949                         next;
5950                 }
5951                 my $commit = $co{'id'};
5952
5953                 my $ref = format_ref_marker($refs, $commit);
5954
5955                 if ($alternate) {
5956                         print "<tr class=\"dark\">\n";
5957                 } else {
5958                         print "<tr class=\"light\">\n";
5959                 }
5960                 $alternate ^= 1;
5961                 print "<td title=\"$co{'age_string_age'}\"><i>$co{'age_string_date'}</i></td>\n" .
5962         # shortlog:   format_author_html('td', \%co, 10)
5963                       format_author_html('td', \%co, 15, 3) . "<td>";
5964                 # originally git_history used chop_str($co{'title'}, 50)
5965                 print format_subject_html($co{'title'}, $co{'title_short'},
5966                                           href(action=>"commit", hash=>$commit), $ref);
5967                 print "</td>\n" .
5968                       "<td class=\"link\">" .
5969                       $cgi->a({-href => href(action=>$ftype, hash_base=>$commit, file_name=>$file_name)}, $ftype) . " | " .
5970                       $cgi->a({-href => href(action=>"commitdiff", hash=>$commit)}, "commitdiff");
5971
5972                 if ($ftype eq 'blob') {
5973                         my $blob_current = $file_hash;
5974                         my $blob_parent  = git_get_hash_by_path($commit, $file_name);
5975                         if (defined $blob_current && defined $blob_parent &&
5976                                         $blob_current ne $blob_parent) {
5977                                 print " | " .
5978                                         $cgi->a({-href => href(action=>"blobdiff",
5979                                                                hash=>$blob_current, hash_parent=>$blob_parent,
5980                                                                hash_base=>$hash_base, hash_parent_base=>$commit,
5981                                                                file_name=>$file_name)},
5982                                                 "diff to current");
5983                         }
5984                 }
5985                 print "</td>\n" .
5986                       "</tr>\n";
5987         }
5988         if (defined $extra) {
5989                 print "<tr>\n" .
5990                       "<td colspan=\"4\">$extra</td>\n" .
5991                       "</tr>\n";
5992         }
5993         print "</table>\n";
5994 }
5995
5996 sub git_tags_body {
5997         # uses global variable $project
5998         my ($taglist, $from, $to, $extra) = @_;
5999         $from = 0 unless defined $from;
6000         $to = $#{$taglist} if (!defined $to || $#{$taglist} < $to);
6001
6002         print "<table class=\"tags\">\n";
6003         my $alternate = 1;
6004         for (my $i = $from; $i <= $to; $i++) {
6005                 my $entry = $taglist->[$i];
6006                 my %tag = %$entry;
6007                 my $comment = $tag{'subject'};
6008                 my $comment_short;
6009                 if (defined $comment) {
6010                         $comment_short = chop_str($comment, 30, 5);
6011                 }
6012                 if ($alternate) {
6013                         print "<tr class=\"dark\">\n";
6014                 } else {
6015                         print "<tr class=\"light\">\n";
6016                 }
6017                 $alternate ^= 1;
6018                 if (defined $tag{'age'}) {
6019                         print "<td><i>$tag{'age'}</i></td>\n";
6020                 } else {
6021                         print "<td></td>\n";
6022                 }
6023                 print "<td>" .
6024                       $cgi->a({-href => href(action=>$tag{'reftype'}, hash=>$tag{'refid'}),
6025                                -class => "list name"}, esc_html($tag{'name'})) .
6026                       "</td>\n" .
6027                       "<td>";
6028                 if (defined $comment) {
6029                         print format_subject_html($comment, $comment_short,
6030                                                   href(action=>"tag", hash=>$tag{'id'}));
6031                 }
6032                 print "</td>\n" .
6033                       "<td class=\"selflink\">";
6034                 if ($tag{'type'} eq "tag") {
6035                         print $cgi->a({-href => href(action=>"tag", hash=>$tag{'id'})}, "tag");
6036                 } else {
6037                         print "&nbsp;";
6038                 }
6039                 print "</td>\n" .
6040                       "<td class=\"link\">" . " | " .
6041                       $cgi->a({-href => href(action=>$tag{'reftype'}, hash=>$tag{'refid'})}, $tag{'reftype'});
6042                 if ($tag{'reftype'} eq "commit") {
6043                         print " | " . $cgi->a({-href => href(action=>"shortlog", hash=>$tag{'fullname'})}, "log");
6044                 } elsif ($tag{'reftype'} eq "blob") {
6045                         print " | " . $cgi->a({-href => href(action=>"blob_plain", hash=>$tag{'refid'})}, "raw");
6046                 }
6047                 print "</td>\n" .
6048                       "</tr>";
6049         }
6050         if (defined $extra) {
6051                 print "<tr>\n" .
6052                       "<td colspan=\"5\">$extra</td>\n" .
6053                       "</tr>\n";
6054         }
6055         print "</table>\n";
6056 }
6057
6058 sub git_heads_body {
6059         # uses global variable $project
6060         my ($headlist, $head_at, $from, $to, $extra) = @_;
6061         $from = 0 unless defined $from;
6062         $to = $#{$headlist} if (!defined $to || $#{$headlist} < $to);
6063
6064         print "<table class=\"heads\">\n";
6065         my $alternate = 1;
6066         for (my $i = $from; $i <= $to; $i++) {
6067                 my $entry = $headlist->[$i];
6068                 my %ref = %$entry;
6069                 my $curr = defined $head_at && $ref{'id'} eq $head_at;
6070                 if ($alternate) {
6071                         print "<tr class=\"dark\">\n";
6072                 } else {
6073                         print "<tr class=\"light\">\n";
6074                 }
6075                 $alternate ^= 1;
6076                 print "<td><i>$ref{'age'}</i></td>\n" .
6077                       ($curr ? "<td class=\"current_head\">" : "<td>") .
6078                       $cgi->a({-href => href(action=>"shortlog", hash=>$ref{'fullname'}),
6079                                -class => "list name"},esc_html($ref{'name'})) .
6080                       "</td>\n" .
6081                       "<td class=\"link\">" .
6082                       $cgi->a({-href => href(action=>"shortlog", hash=>$ref{'fullname'})}, "log") . " | " .
6083                       $cgi->a({-href => href(action=>"tree", hash=>$ref{'fullname'}, hash_base=>$ref{'fullname'})}, "tree") .
6084                       "</td>\n" .
6085                       "</tr>";
6086         }
6087         if (defined $extra) {
6088                 print "<tr>\n" .
6089                       "<td colspan=\"3\">$extra</td>\n" .
6090                       "</tr>\n";
6091         }
6092         print "</table>\n";
6093 }
6094
6095 # Display a single remote block
6096 sub git_remote_block {
6097         my ($remote, $rdata, $limit, $head) = @_;
6098
6099         my $heads = $rdata->{'heads'};
6100         my $fetch = $rdata->{'fetch'};
6101         my $push = $rdata->{'push'};
6102
6103         my $urls_table = "<table class=\"projects_list\">\n" ;
6104
6105         if (defined $fetch) {
6106                 if ($fetch eq $push) {
6107                         $urls_table .= format_repo_url("URL", $fetch);
6108                 } else {
6109                         $urls_table .= format_repo_url("Fetch URL", $fetch);
6110                         $urls_table .= format_repo_url("Push URL", $push) if defined $push;
6111                 }
6112         } elsif (defined $push) {
6113                 $urls_table .= format_repo_url("Push URL", $push);
6114         } else {
6115                 $urls_table .= format_repo_url("", "No remote URL");
6116         }
6117
6118         $urls_table .= "</table>\n";
6119
6120         my $dots;
6121         if (defined $limit && $limit < @$heads) {
6122                 $dots = $cgi->a({-href => href(action=>"remotes", hash=>$remote)}, "...");
6123         }
6124
6125         print $urls_table;
6126         git_heads_body($heads, $head, 0, $limit, $dots);
6127 }
6128
6129 # Display a list of remote names with the respective fetch and push URLs
6130 sub git_remotes_list {
6131         my ($remotedata, $limit) = @_;
6132         print "<table class=\"heads\">\n";
6133         my $alternate = 1;
6134         my @remotes = sort keys %$remotedata;
6135
6136         my $limited = $limit && $limit < @remotes;
6137
6138         $#remotes = $limit - 1 if $limited;
6139
6140         while (my $remote = shift @remotes) {
6141                 my $rdata = $remotedata->{$remote};
6142                 my $fetch = $rdata->{'fetch'};
6143                 my $push = $rdata->{'push'};
6144                 if ($alternate) {
6145                         print "<tr class=\"dark\">\n";
6146                 } else {
6147                         print "<tr class=\"light\">\n";
6148                 }
6149                 $alternate ^= 1;
6150                 print "<td>" .
6151                       $cgi->a({-href=> href(action=>'remotes', hash=>$remote),
6152                                -class=> "list name"},esc_html($remote)) .
6153                       "</td>";
6154                 print "<td class=\"link\">" .
6155                       (defined $fetch ? $cgi->a({-href=> $fetch}, "fetch") : "fetch") .
6156                       " | " .
6157                       (defined $push ? $cgi->a({-href=> $push}, "push") : "push") .
6158                       "</td>";
6159
6160                 print "</tr>\n";
6161         }
6162
6163         if ($limited) {
6164                 print "<tr>\n" .
6165                       "<td colspan=\"3\">" .
6166                       $cgi->a({-href => href(action=>"remotes")}, "...") .
6167                       "</td>\n" . "</tr>\n";
6168         }
6169
6170         print "</table>";
6171 }
6172
6173 # Display remote heads grouped by remote, unless there are too many
6174 # remotes, in which case we only display the remote names
6175 sub git_remotes_body {
6176         my ($remotedata, $limit, $head) = @_;
6177         if ($limit and $limit < keys %$remotedata) {
6178                 git_remotes_list($remotedata, $limit);
6179         } else {
6180                 fill_remote_heads($remotedata);
6181                 while (my ($remote, $rdata) = each %$remotedata) {
6182                         git_print_section({-class=>"remote", -id=>$remote},
6183                                 ["remotes", $remote, $remote], sub {
6184                                         git_remote_block($remote, $rdata, $limit, $head);
6185                                 });
6186                 }
6187         }
6188 }
6189
6190 sub git_search_message {
6191         my %co = @_;
6192
6193         my $greptype;
6194         if ($searchtype eq 'commit') {
6195                 $greptype = "--grep=";
6196         } elsif ($searchtype eq 'author') {
6197                 $greptype = "--author=";
6198         } elsif ($searchtype eq 'committer') {
6199                 $greptype = "--committer=";
6200         }
6201         $greptype .= $searchtext;
6202         my @commitlist = parse_commits($hash, 101, (100 * $page), undef,
6203                                        $greptype, '--regexp-ignore-case',
6204                                        $search_use_regexp ? '--extended-regexp' : '--fixed-strings');
6205
6206         my $paging_nav = '';
6207         if ($page > 0) {
6208                 $paging_nav .=
6209                         $cgi->a({-href => href(-replay=>1, page=>undef)},
6210                                 "first") .
6211                         " &sdot; " .
6212                         $cgi->a({-href => href(-replay=>1, page=>$page-1),
6213                                  -accesskey => "p", -title => "Alt-p"}, "prev");
6214         } else {
6215                 $paging_nav .= "first &sdot; prev";
6216         }
6217         my $next_link = '';
6218         if ($#commitlist >= 100) {
6219                 $next_link =
6220                         $cgi->a({-href => href(-replay=>1, page=>$page+1),
6221                                  -accesskey => "n", -title => "Alt-n"}, "next");
6222                 $paging_nav .= " &sdot; $next_link";
6223         } else {
6224                 $paging_nav .= " &sdot; next";
6225         }
6226
6227         git_header_html();
6228
6229         git_print_page_nav('','', $hash,$co{'tree'},$hash, $paging_nav);
6230         git_print_header_div('commit', esc_html($co{'title'}), $hash);
6231         if ($page == 0 && !@commitlist) {
6232                 print "<p>No match.</p>\n";
6233         } else {
6234                 git_search_grep_body(\@commitlist, 0, 99, $next_link);
6235         }
6236
6237         git_footer_html();
6238 }
6239
6240 sub git_search_changes {
6241         my %co = @_;
6242
6243         local $/ = "\n";
6244         open my $fd, '-|', git_cmd(), '--no-pager', 'log', @diff_opts,
6245                 '--pretty=format:%H', '--no-abbrev', '--raw', "-S$searchtext",
6246                 ($search_use_regexp ? '--pickaxe-regex' : ())
6247                         or die_error(500, "Open git-log failed");
6248
6249         git_header_html();
6250
6251         git_print_page_nav('','', $hash,$co{'tree'},$hash);
6252         git_print_header_div('commit', esc_html($co{'title'}), $hash);
6253
6254         print "<table class=\"pickaxe search\">\n";
6255         my $alternate = 1;
6256         undef %co;
6257         my @files;
6258         while (my $line = <$fd>) {
6259                 chomp $line;
6260                 next unless $line;
6261
6262                 my %set = parse_difftree_raw_line($line);
6263                 if (defined $set{'commit'}) {
6264                         # finish previous commit
6265                         if (%co) {
6266                                 print "</td>\n" .
6267                                       "<td class=\"link\">" .
6268                                       $cgi->a({-href => href(action=>"commit", hash=>$co{'id'})},
6269                                               "commit") .
6270                                       " | " .
6271                                       $cgi->a({-href => href(action=>"tree", hash=>$co{'tree'},
6272                                                              hash_base=>$co{'id'})},
6273                                               "tree") .
6274                                       "</td>\n" .
6275                                       "</tr>\n";
6276                         }
6277
6278                         if ($alternate) {
6279                                 print "<tr class=\"dark\">\n";
6280                         } else {
6281                                 print "<tr class=\"light\">\n";
6282                         }
6283                         $alternate ^= 1;
6284                         %co = parse_commit($set{'commit'});
6285                         my $author = chop_and_escape_str($co{'author_name'}, 15, 5);
6286                         print "<td title=\"$co{'age_string_age'}\"><i>$co{'age_string_date'}</i></td>\n" .
6287                               "<td><i>$author</i></td>\n" .
6288                               "<td>" .
6289                               $cgi->a({-href => href(action=>"commit", hash=>$co{'id'}),
6290                                       -class => "list subject"},
6291                                       chop_and_escape_str($co{'title'}, 50) . "<br/>");
6292                 } elsif (defined $set{'to_id'}) {
6293                         next if ($set{'to_id'} =~ m/^0{40}$/);
6294
6295                         print $cgi->a({-href => href(action=>"blob", hash_base=>$co{'id'},
6296                                                      hash=>$set{'to_id'}, file_name=>$set{'to_file'}),
6297                                       -class => "list"},
6298                                       "<span class=\"match\">" . esc_path($set{'file'}) . "</span>") .
6299                               "<br/>\n";
6300                 }
6301         }
6302         close $fd;
6303
6304         # finish last commit (warning: repetition!)
6305         if (%co) {
6306                 print "</td>\n" .
6307                       "<td class=\"link\">" .
6308                       $cgi->a({-href => href(action=>"commit", hash=>$co{'id'})},
6309                               "commit") .
6310                       " | " .
6311                       $cgi->a({-href => href(action=>"tree", hash=>$co{'tree'},
6312                                              hash_base=>$co{'id'})},
6313                               "tree") .
6314                       "</td>\n" .
6315                       "</tr>\n";
6316         }
6317
6318         print "</table>\n";
6319
6320         git_footer_html();
6321 }
6322
6323 sub git_search_files {
6324         my %co = @_;
6325
6326         local $/ = "\n";
6327         open my $fd, "-|", git_cmd(), 'grep', '-n', '-z',
6328                 $search_use_regexp ? ('-E', '-i') : '-F',
6329                 $searchtext, $co{'tree'}
6330                         or die_error(500, "Open git-grep failed");
6331
6332         git_header_html();
6333
6334         git_print_page_nav('','', $hash,$co{'tree'},$hash);
6335         git_print_header_div('commit', esc_html($co{'title'}), $hash);
6336
6337         print "<table class=\"grep_search\">\n";
6338         my $alternate = 1;
6339         my $matches = 0;
6340         my $lastfile = '';
6341         my $file_href;
6342         while (my $line = <$fd>) {
6343                 chomp $line;
6344                 my ($file, $lno, $ltext, $binary);
6345                 last if ($matches++ > 1000);
6346                 if ($line =~ /^Binary file (.+) matches$/) {
6347                         $file = $1;
6348                         $binary = 1;
6349                 } else {
6350                         ($file, $lno, $ltext) = split(/\0/, $line, 3);
6351                         $file =~ s/^$co{'tree'}://;
6352                 }
6353                 if ($file ne $lastfile) {
6354                         $lastfile and print "</td></tr>\n";
6355                         if ($alternate++) {
6356                                 print "<tr class=\"dark\">\n";
6357                         } else {
6358                                 print "<tr class=\"light\">\n";
6359                         }
6360                         $file_href = href(action=>"blob", hash_base=>$co{'id'},
6361                                           file_name=>$file);
6362                         print "<td class=\"list\">".
6363                                 $cgi->a({-href => $file_href, -class => "list"}, esc_path($file));
6364                         print "</td><td>\n";
6365                         $lastfile = $file;
6366                 }
6367                 if ($binary) {
6368                         print "<div class=\"binary\">Binary file</div>\n";
6369                 } else {
6370                         $ltext = untabify($ltext);
6371                         if ($ltext =~ m/^(.*)($search_regexp)(.*)$/i) {
6372                                 $ltext = esc_html($1, -nbsp=>1);
6373                                 $ltext .= '<span class="match">';
6374                                 $ltext .= esc_html($2, -nbsp=>1);
6375                                 $ltext .= '</span>';
6376                                 $ltext .= esc_html($3, -nbsp=>1);
6377                         } else {
6378                                 $ltext = esc_html($ltext, -nbsp=>1);
6379                         }
6380                         print "<div class=\"pre\">" .
6381                                 $cgi->a({-href => $file_href.'#l'.$lno,
6382                                         -class => "linenr"}, sprintf('%4i', $lno)) .
6383                                 ' ' .  $ltext . "</div>\n";
6384                 }
6385         }
6386         if ($lastfile) {
6387                 print "</td></tr>\n";
6388                 if ($matches > 1000) {
6389                         print "<div class=\"diff nodifferences\">Too many matches, listing trimmed</div>\n";
6390                 }
6391         } else {
6392                 print "<div class=\"diff nodifferences\">No matches found</div>\n";
6393         }
6394         close $fd;
6395
6396         print "</table>\n";
6397
6398         git_footer_html();
6399 }
6400
6401 sub git_search_grep_body {
6402         my ($commitlist, $from, $to, $extra) = @_;
6403         $from = 0 unless defined $from;
6404         $to = $#{$commitlist} if (!defined $to || $#{$commitlist} < $to);
6405
6406         print "<table class=\"commit_search\">\n";
6407         my $alternate = 1;
6408         for (my $i = $from; $i <= $to; $i++) {
6409                 my %co = %{$commitlist->[$i]};
6410                 if (!%co) {
6411                         next;
6412                 }
6413                 my $commit = $co{'id'};
6414                 if ($alternate) {
6415                         print "<tr class=\"dark\">\n";
6416                 } else {
6417                         print "<tr class=\"light\">\n";
6418                 }
6419                 $alternate ^= 1;
6420                 print "<td title=\"$co{'age_string_age'}\"><i>$co{'age_string_date'}</i></td>\n" .
6421                       format_author_html('td', \%co, 15, 5) .
6422                       "<td>" .
6423                       $cgi->a({-href => href(action=>"commit", hash=>$co{'id'}),
6424                                -class => "list subject"},
6425                               chop_and_escape_str($co{'title'}, 50) . "<br/>");
6426                 my $comment = $co{'comment'};
6427                 foreach my $line (@$comment) {
6428                         if ($line =~ m/^(.*?)($search_regexp)(.*)$/i) {
6429                                 my ($lead, $match, $trail) = ($1, $2, $3);
6430                                 $match = chop_str($match, 70, 5, 'center');
6431                                 my $contextlen = int((80 - length($match))/2);
6432                                 $contextlen = 30 if ($contextlen > 30);
6433                                 $lead  = chop_str($lead,  $contextlen, 10, 'left');
6434                                 $trail = chop_str($trail, $contextlen, 10, 'right');
6435
6436                                 $lead  = esc_html($lead);
6437                                 $match = esc_html($match);
6438                                 $trail = esc_html($trail);
6439
6440                                 print "$lead<span class=\"match\">$match</span>$trail<br />";
6441                         }
6442                 }
6443                 print "</td>\n" .
6444                       "<td class=\"link\">" .
6445                       $cgi->a({-href => href(action=>"commit", hash=>$co{'id'})}, "commit") .
6446                       " | " .
6447                       $cgi->a({-href => href(action=>"commitdiff", hash=>$co{'id'})}, "commitdiff") .
6448                       " | " .
6449                       $cgi->a({-href => href(action=>"tree", hash=>$co{'tree'}, hash_base=>$co{'id'})}, "tree");
6450                 print "</td>\n" .
6451                       "</tr>\n";
6452         }
6453         if (defined $extra) {
6454                 print "<tr>\n" .
6455                       "<td colspan=\"3\">$extra</td>\n" .
6456                       "</tr>\n";
6457         }
6458         print "</table>\n";
6459 }
6460
6461 ## ======================================================================
6462 ## ======================================================================
6463 ## actions
6464
6465 sub git_project_list {
6466         my $order = $input_params{'order'};
6467         if (defined $order && $order !~ m/none|project|descr|owner|age/) {
6468                 die_error(400, "Unknown order parameter");
6469         }
6470
6471         my @list = git_get_projects_list($project_filter, $strict_export);
6472         if (!@list) {
6473                 die_error(404, "No projects found");
6474         }
6475
6476         git_header_html();
6477         if (defined $home_text && -f $home_text) {
6478                 print "<div class=\"index_include\">\n";
6479                 insert_file($home_text);
6480                 print "</div>\n";
6481         }
6482
6483         git_project_search_form($searchtext, $search_use_regexp);
6484         git_project_list_body(\@list, $order);
6485         git_footer_html();
6486 }
6487
6488 sub git_forks {
6489         my $order = $input_params{'order'};
6490         if (defined $order && $order !~ m/none|project|descr|owner|age/) {
6491                 die_error(400, "Unknown order parameter");
6492         }
6493
6494         my $filter = $project;
6495         $filter =~ s/\.git$//;
6496         my @list = git_get_projects_list($filter);
6497         if (!@list) {
6498                 die_error(404, "No forks found");
6499         }
6500
6501         git_header_html();
6502         git_print_page_nav('','');
6503         git_print_header_div('summary', "$project forks");
6504         git_project_list_body(\@list, $order);
6505         git_footer_html();
6506 }
6507
6508 sub git_project_index {
6509         my @projects = git_get_projects_list($project_filter, $strict_export);
6510         if (!@projects) {
6511                 die_error(404, "No projects found");
6512         }
6513
6514         print $cgi->header(
6515                 -type => 'text/plain',
6516                 -charset => 'utf-8',
6517                 -content_disposition => 'inline; filename="index.aux"');
6518
6519         foreach my $pr (@projects) {
6520                 if (!exists $pr->{'owner'}) {
6521                         $pr->{'owner'} = git_get_project_owner("$pr->{'path'}");
6522                 }
6523
6524                 my ($path, $owner) = ($pr->{'path'}, $pr->{'owner'});
6525                 # quote as in CGI::Util::encode, but keep the slash, and use '+' for ' '
6526                 $path  =~ s/([^a-zA-Z0-9_.\-\/ ])/sprintf("%%%02X", ord($1))/eg;
6527                 $owner =~ s/([^a-zA-Z0-9_.\-\/ ])/sprintf("%%%02X", ord($1))/eg;
6528                 $path  =~ s/ /\+/g;
6529                 $owner =~ s/ /\+/g;
6530
6531                 print "$path $owner\n";
6532         }
6533 }
6534
6535 sub git_summary {
6536         my $descr = git_get_project_description($project) || "none";
6537         my %co = parse_commit("HEAD");
6538         my %cd = %co ? parse_date($co{'committer_epoch'}, $co{'committer_tz'}) : ();
6539         my $head = $co{'id'};
6540         my $remote_heads = gitweb_check_feature('remote_heads');
6541
6542         my $owner = git_get_project_owner($project);
6543
6544         my $refs = git_get_references();
6545         # These get_*_list functions return one more to allow us to see if
6546         # there are more ...
6547         my @taglist  = git_get_tags_list(16);
6548         my @headlist = git_get_heads_list(16);
6549         my %remotedata = $remote_heads ? git_get_remotes_list() : ();
6550         my @forklist;
6551         my $check_forks = gitweb_check_feature('forks');
6552
6553         if ($check_forks) {
6554                 # find forks of a project
6555                 my $filter = $project;
6556                 $filter =~ s/\.git$//;
6557                 @forklist = git_get_projects_list($filter);
6558                 # filter out forks of forks
6559                 @forklist = filter_forks_from_projects_list(\@forklist)
6560                         if (@forklist);
6561         }
6562
6563         git_header_html();
6564         git_print_page_nav('summary','', $head);
6565
6566         print "<div class=\"title\">&nbsp;</div>\n";
6567         print "<table class=\"projects_list\">\n" .
6568               "<tr id=\"metadata_desc\"><td>description</td><td>" . esc_html($descr) . "</td></tr>\n";
6569         if ($owner and not $omit_owner) {
6570                 print  "<tr id=\"metadata_owner\"><td>owner</td><td>" . esc_html($owner) . "</td></tr>\n";
6571         }
6572         if (defined $cd{'rfc2822'}) {
6573                 print "<tr id=\"metadata_lchange\"><td>last change</td>" .
6574                       "<td>".format_timestamp_html(\%cd)."</td></tr>\n";
6575         }
6576
6577         # use per project git URL list in $projectroot/$project/cloneurl
6578         # or make project git URL from git base URL and project name
6579         my $url_tag = "URL";
6580         my @url_list = git_get_project_url_list($project);
6581         @url_list = map { "$_/$project" } @git_base_url_list unless @url_list;
6582         foreach my $git_url (@url_list) {
6583                 next unless $git_url;
6584                 print format_repo_url($url_tag, $git_url);
6585                 $url_tag = "";
6586         }
6587
6588         # Tag cloud
6589         my $show_ctags = gitweb_check_feature('ctags');
6590         if ($show_ctags) {
6591                 my $ctags = git_get_project_ctags($project);
6592                 if (%$ctags) {
6593                         # without ability to add tags, don't show if there are none
6594                         my $cloud = git_populate_project_tagcloud($ctags);
6595                         print "<tr id=\"metadata_ctags\">" .
6596                               "<td>content tags</td>" .
6597                               "<td>".git_show_project_tagcloud($cloud, 48)."</td>" .
6598                               "</tr>\n";
6599                 }
6600         }
6601
6602         print "</table>\n";
6603
6604         # If XSS prevention is on, we don't include README.html.
6605         # TODO: Allow a readme in some safe format.
6606         if (!$prevent_xss && -s "$projectroot/$project/README.html") {
6607                 print "<div class=\"title\">readme</div>\n" .
6608                       "<div class=\"readme\">\n";
6609                 insert_file("$projectroot/$project/README.html");
6610                 print "\n</div>\n"; # class="readme"
6611         }
6612
6613         # we need to request one more than 16 (0..15) to check if
6614         # those 16 are all
6615         my @commitlist = $head ? parse_commits($head, 17) : ();
6616         if (@commitlist) {
6617                 git_print_header_div('shortlog');
6618                 git_shortlog_body(\@commitlist, 0, 15, $refs,
6619                                   $#commitlist <=  15 ? undef :
6620                                   $cgi->a({-href => href(action=>"shortlog")}, "..."));
6621         }
6622
6623         if (@taglist) {
6624                 git_print_header_div('tags');
6625                 git_tags_body(\@taglist, 0, 15,
6626                               $#taglist <=  15 ? undef :
6627                               $cgi->a({-href => href(action=>"tags")}, "..."));
6628         }
6629
6630         if (@headlist) {
6631                 git_print_header_div('heads');
6632                 git_heads_body(\@headlist, $head, 0, 15,
6633                                $#headlist <= 15 ? undef :
6634                                $cgi->a({-href => href(action=>"heads")}, "..."));
6635         }
6636
6637         if (%remotedata) {
6638                 git_print_header_div('remotes');
6639                 git_remotes_body(\%remotedata, 15, $head);
6640         }
6641
6642         if (@forklist) {
6643                 git_print_header_div('forks');
6644                 git_project_list_body(\@forklist, 'age', 0, 15,
6645                                       $#forklist <= 15 ? undef :
6646                                       $cgi->a({-href => href(action=>"forks")}, "..."),
6647                                       'no_header');
6648         }
6649
6650         git_footer_html();
6651 }
6652
6653 sub git_tag {
6654         my %tag = parse_tag($hash);
6655
6656         if (! %tag) {
6657                 die_error(404, "Unknown tag object");
6658         }
6659
6660         my $head = git_get_head_hash($project);
6661         git_header_html();
6662         git_print_page_nav('','', $head,undef,$head);
6663         git_print_header_div('commit', esc_html($tag{'name'}), $hash);
6664         print "<div class=\"title_text\">\n" .
6665               "<table class=\"object_header\">\n" .
6666               "<tr>\n" .
6667               "<td>object</td>\n" .
6668               "<td>" . $cgi->a({-class => "list", -href => href(action=>$tag{'type'}, hash=>$tag{'object'})},
6669                                $tag{'object'}) . "</td>\n" .
6670               "<td class=\"link\">" . $cgi->a({-href => href(action=>$tag{'type'}, hash=>$tag{'object'})},
6671                                               $tag{'type'}) . "</td>\n" .
6672               "</tr>\n";
6673         if (defined($tag{'author'})) {
6674                 git_print_authorship_rows(\%tag, 'author');
6675         }
6676         print "</table>\n\n" .
6677               "</div>\n";
6678         print "<div class=\"page_body\">";
6679         my $comment = $tag{'comment'};
6680         foreach my $line (@$comment) {
6681                 chomp $line;
6682                 print esc_html($line, -nbsp=>1) . "<br/>\n";
6683         }
6684         print "</div>\n";
6685         git_footer_html();
6686 }
6687
6688 sub git_blame_common {
6689         my $format = shift || 'porcelain';
6690         if ($format eq 'porcelain' && $input_params{'javascript'}) {
6691                 $format = 'incremental';
6692                 $action = 'blame_incremental'; # for page title etc
6693         }
6694
6695         # permissions
6696         gitweb_check_feature('blame')
6697                 or die_error(403, "Blame view not allowed");
6698
6699         # error checking
6700         die_error(400, "No file name given") unless $file_name;
6701         $hash_base ||= git_get_head_hash($project);
6702         die_error(404, "Couldn't find base commit") unless $hash_base;
6703         my %co = parse_commit($hash_base)
6704                 or die_error(404, "Commit not found");
6705         my $ftype = "blob";
6706         if (!defined $hash) {
6707                 $hash = git_get_hash_by_path($hash_base, $file_name, "blob")
6708                         or die_error(404, "Error looking up file");
6709         } else {
6710                 $ftype = git_get_type($hash);
6711                 if ($ftype !~ "blob") {
6712                         die_error(400, "Object is not a blob");
6713                 }
6714         }
6715
6716         my $fd;
6717         if ($format eq 'incremental') {
6718                 # get file contents (as base)
6719                 open $fd, "-|", git_cmd(), 'cat-file', 'blob', $hash
6720                         or die_error(500, "Open git-cat-file failed");
6721         } elsif ($format eq 'data') {
6722                 # run git-blame --incremental
6723                 open $fd, "-|", git_cmd(), "blame", "--incremental",
6724                         $hash_base, "--", $file_name
6725                         or die_error(500, "Open git-blame --incremental failed");
6726         } else {
6727                 # run git-blame --porcelain
6728                 open $fd, "-|", git_cmd(), "blame", '-p',
6729                         $hash_base, '--', $file_name
6730                         or die_error(500, "Open git-blame --porcelain failed");
6731         }
6732         binmode $fd, ':utf8';
6733
6734         # incremental blame data returns early
6735         if ($format eq 'data') {
6736                 print $cgi->header(
6737                         -type=>"text/plain", -charset => "utf-8",
6738                         -status=> "200 OK");
6739                 local $| = 1; # output autoflush
6740                 while (my $line = <$fd>) {
6741                         print to_utf8($line);
6742                 }
6743                 close $fd
6744                         or print "ERROR $!\n";
6745
6746                 print 'END';
6747                 if (defined $t0 && gitweb_check_feature('timed')) {
6748                         print ' '.
6749                               tv_interval($t0, [ gettimeofday() ]).
6750                               ' '.$number_of_git_cmds;
6751                 }
6752                 print "\n";
6753
6754                 return;
6755         }
6756
6757         # page header
6758         git_header_html();
6759         my $formats_nav =
6760                 $cgi->a({-href => href(action=>"blob", -replay=>1)},
6761                         "blob") .
6762                 " | ";
6763         if ($format eq 'incremental') {
6764                 $formats_nav .=
6765                         $cgi->a({-href => href(action=>"blame", javascript=>0, -replay=>1)},
6766                                 "blame") . " (non-incremental)";
6767         } else {
6768                 $formats_nav .=
6769                         $cgi->a({-href => href(action=>"blame_incremental", -replay=>1)},
6770                                 "blame") . " (incremental)";
6771         }
6772         $formats_nav .=
6773                 " | " .
6774                 $cgi->a({-href => href(action=>"history", -replay=>1)},
6775                         "history") .
6776                 " | " .
6777                 $cgi->a({-href => href(action=>$action, file_name=>$file_name)},
6778                         "HEAD");
6779         git_print_page_nav('','', $hash_base,$co{'tree'},$hash_base, $formats_nav);
6780         git_print_header_div('commit', esc_html($co{'title'}), $hash_base);
6781         git_print_page_path($file_name, $ftype, $hash_base);
6782
6783         # page body
6784         if ($format eq 'incremental') {
6785                 print "<noscript>\n<div class=\"error\"><center><b>\n".
6786                       "This page requires JavaScript to run.\n Use ".
6787                       $cgi->a({-href => href(action=>'blame',javascript=>0,-replay=>1)},
6788                               'this page').
6789                       " instead.\n".
6790                       "</b></center></div>\n</noscript>\n";
6791
6792                 print qq!<div id="progress_bar" style="width: 100%; background-color: yellow"></div>\n!;
6793         }
6794
6795         print qq!<div class="page_body">\n!;
6796         print qq!<div id="progress_info">... / ...</div>\n!
6797                 if ($format eq 'incremental');
6798         print qq!<table id="blame_table" class="blame" width="100%">\n!.
6799               #qq!<col width="5.5em" /><col width="2.5em" /><col width="*" />\n!.
6800               qq!<thead>\n!.
6801               qq!<tr><th>Commit</th><th>Line</th><th>Data</th></tr>\n!.
6802               qq!</thead>\n!.
6803               qq!<tbody>\n!;
6804
6805         my @rev_color = qw(light dark);
6806         my $num_colors = scalar(@rev_color);
6807         my $current_color = 0;
6808
6809         if ($format eq 'incremental') {
6810                 my $color_class = $rev_color[$current_color];
6811
6812                 #contents of a file
6813                 my $linenr = 0;
6814         LINE:
6815                 while (my $line = <$fd>) {
6816                         chomp $line;
6817                         $linenr++;
6818
6819                         print qq!<tr id="l$linenr" class="$color_class">!.
6820                               qq!<td class="sha1"><a href=""> </a></td>!.
6821                               qq!<td class="linenr">!.
6822                               qq!<a class="linenr" href="">$linenr</a></td>!;
6823                         print qq!<td class="pre">! . esc_html($line) . "</td>\n";
6824                         print qq!</tr>\n!;
6825                 }
6826
6827         } else { # porcelain, i.e. ordinary blame
6828                 my %metainfo = (); # saves information about commits
6829
6830                 # blame data
6831         LINE:
6832                 while (my $line = <$fd>) {
6833                         chomp $line;
6834                         # the header: <SHA-1> <src lineno> <dst lineno> [<lines in group>]
6835                         # no <lines in group> for subsequent lines in group of lines
6836                         my ($full_rev, $orig_lineno, $lineno, $group_size) =
6837                            ($line =~ /^([0-9a-f]{40}) (\d+) (\d+)(?: (\d+))?$/);
6838                         if (!exists $metainfo{$full_rev}) {
6839                                 $metainfo{$full_rev} = { 'nprevious' => 0 };
6840                         }
6841                         my $meta = $metainfo{$full_rev};
6842                         my $data;
6843                         while ($data = <$fd>) {
6844                                 chomp $data;
6845                                 last if ($data =~ s/^\t//); # contents of line
6846                                 if ($data =~ /^(\S+)(?: (.*))?$/) {
6847                                         $meta->{$1} = $2 unless exists $meta->{$1};
6848                                 }
6849                                 if ($data =~ /^previous /) {
6850                                         $meta->{'nprevious'}++;
6851                                 }
6852                         }
6853                         my $short_rev = substr($full_rev, 0, 8);
6854                         my $author = $meta->{'author'};
6855                         my %date =
6856                                 parse_date($meta->{'author-time'}, $meta->{'author-tz'});
6857                         my $date = $date{'iso-tz'};
6858                         if ($group_size) {
6859                                 $current_color = ($current_color + 1) % $num_colors;
6860                         }
6861                         my $tr_class = $rev_color[$current_color];
6862                         $tr_class .= ' boundary' if (exists $meta->{'boundary'});
6863                         $tr_class .= ' no-previous' if ($meta->{'nprevious'} == 0);
6864                         $tr_class .= ' multiple-previous' if ($meta->{'nprevious'} > 1);
6865                         print "<tr id=\"l$lineno\" class=\"$tr_class\">\n";
6866                         if ($group_size) {
6867                                 print "<td class=\"sha1\"";
6868                                 print " title=\"". esc_html($author) . ", $date\"";
6869                                 print " rowspan=\"$group_size\"" if ($group_size > 1);
6870                                 print ">";
6871                                 print $cgi->a({-href => href(action=>"commit",
6872                                                              hash=>$full_rev,
6873                                                              file_name=>$file_name)},
6874                                               esc_html($short_rev));
6875                                 if ($group_size >= 2) {
6876                                         my @author_initials = ($author =~ /\b([[:upper:]])\B/g);
6877                                         if (@author_initials) {
6878                                                 print "<br />" .
6879                                                       esc_html(join('', @author_initials));
6880                                                 #           or join('.', ...)
6881                                         }
6882                                 }
6883                                 print "</td>\n";
6884                         }
6885                         # 'previous' <sha1 of parent commit> <filename at commit>
6886                         if (exists $meta->{'previous'} &&
6887                             $meta->{'previous'} =~ /^([a-fA-F0-9]{40}) (.*)$/) {
6888                                 $meta->{'parent'} = $1;
6889                                 $meta->{'file_parent'} = unquote($2);
6890                         }
6891                         my $linenr_commit =
6892                                 exists($meta->{'parent'}) ?
6893                                 $meta->{'parent'} : $full_rev;
6894                         my $linenr_filename =
6895                                 exists($meta->{'file_parent'}) ?
6896                                 $meta->{'file_parent'} : unquote($meta->{'filename'});
6897                         my $blamed = href(action => 'blame',
6898                                           file_name => $linenr_filename,
6899                                           hash_base => $linenr_commit);
6900                         print "<td class=\"linenr\">";
6901                         print $cgi->a({ -href => "$blamed#l$orig_lineno",
6902                                         -class => "linenr" },
6903                                       esc_html($lineno));
6904                         print "</td>";
6905                         print "<td class=\"pre\">" . esc_html($data) . "</td>\n";
6906                         print "</tr>\n";
6907                 } # end while
6908
6909         }
6910
6911         # footer
6912         print "</tbody>\n".
6913               "</table>\n"; # class="blame"
6914         print "</div>\n";   # class="blame_body"
6915         close $fd
6916                 or print "Reading blob failed\n";
6917
6918         git_footer_html();
6919 }
6920
6921 sub git_blame {
6922         git_blame_common();
6923 }
6924
6925 sub git_blame_incremental {
6926         git_blame_common('incremental');
6927 }
6928
6929 sub git_blame_data {
6930         git_blame_common('data');
6931 }
6932
6933 sub git_tags {
6934         my $head = git_get_head_hash($project);
6935         git_header_html();
6936         git_print_page_nav('','', $head,undef,$head,format_ref_views('tags'));
6937         git_print_header_div('summary', $project);
6938
6939         my @tagslist = git_get_tags_list();
6940         if (@tagslist) {
6941                 git_tags_body(\@tagslist);
6942         }
6943         git_footer_html();
6944 }
6945
6946 sub git_heads {
6947         my $head = git_get_head_hash($project);
6948         git_header_html();
6949         git_print_page_nav('','', $head,undef,$head,format_ref_views('heads'));
6950         git_print_header_div('summary', $project);
6951
6952         my @headslist = git_get_heads_list();
6953         if (@headslist) {
6954                 git_heads_body(\@headslist, $head);
6955         }
6956         git_footer_html();
6957 }
6958
6959 # used both for single remote view and for list of all the remotes
6960 sub git_remotes {
6961         gitweb_check_feature('remote_heads')
6962                 or die_error(403, "Remote heads view is disabled");
6963
6964         my $head = git_get_head_hash($project);
6965         my $remote = $input_params{'hash'};
6966
6967         my $remotedata = git_get_remotes_list($remote);
6968         die_error(500, "Unable to get remote information") unless defined $remotedata;
6969
6970         unless (%$remotedata) {
6971                 die_error(404, defined $remote ?
6972                         "Remote $remote not found" :
6973                         "No remotes found");
6974         }
6975
6976         git_header_html(undef, undef, -action_extra => $remote);
6977         git_print_page_nav('', '',  $head, undef, $head,
6978                 format_ref_views($remote ? '' : 'remotes'));
6979
6980         fill_remote_heads($remotedata);
6981         if (defined $remote) {
6982                 git_print_header_div('remotes', "$remote remote for $project");
6983                 git_remote_block($remote, $remotedata->{$remote}, undef, $head);
6984         } else {
6985                 git_print_header_div('summary', "$project remotes");
6986                 git_remotes_body($remotedata, undef, $head);
6987         }
6988
6989         git_footer_html();
6990 }
6991
6992 sub git_blob_plain {
6993         my $type = shift;
6994         my $expires;
6995
6996         if (!defined $hash) {
6997                 if (defined $file_name) {
6998                         my $base = $hash_base || git_get_head_hash($project);
6999                         $hash = git_get_hash_by_path($base, $file_name, "blob")
7000                                 or die_error(404, "Cannot find file");
7001                 } else {
7002                         die_error(400, "No file name defined");
7003                 }
7004         } elsif ($hash =~ m/^[0-9a-fA-F]{40}$/) {
7005                 # blobs defined by non-textual hash id's can be cached
7006                 $expires = "+1d";
7007         }
7008
7009         open my $fd, "-|", git_cmd(), "cat-file", "blob", $hash
7010                 or die_error(500, "Open git-cat-file blob '$hash' failed");
7011
7012         # content-type (can include charset)
7013         $type = blob_contenttype($fd, $file_name, $type);
7014
7015         # "save as" filename, even when no $file_name is given
7016         my $save_as = "$hash";
7017         if (defined $file_name) {
7018                 $save_as = $file_name;
7019         } elsif ($type =~ m/^text\//) {
7020                 $save_as .= '.txt';
7021         }
7022
7023         # With XSS prevention on, blobs of all types except a few known safe
7024         # ones are served with "Content-Disposition: attachment" to make sure
7025         # they don't run in our security domain.  For certain image types,
7026         # blob view writes an <img> tag referring to blob_plain view, and we
7027         # want to be sure not to break that by serving the image as an
7028         # attachment (though Firefox 3 doesn't seem to care).
7029         my $sandbox = $prevent_xss &&
7030                 $type !~ m!^(?:text/[a-z]+|image/(?:gif|png|jpeg))(?:[ ;]|$)!;
7031
7032         # serve text/* as text/plain
7033         if ($prevent_xss &&
7034             ($type =~ m!^text/[a-z]+\b(.*)$! ||
7035              ($type =~ m!^[a-z]+/[a-z]\+xml\b(.*)$! && -T $fd))) {
7036                 my $rest = $1;
7037                 $rest = defined $rest ? $rest : '';
7038                 $type = "text/plain$rest";
7039         }
7040
7041         print $cgi->header(
7042                 -type => $type,
7043                 -expires => $expires,
7044                 -content_disposition =>
7045                         ($sandbox ? 'attachment' : 'inline')
7046                         . '; filename="' . $save_as . '"');
7047         local $/ = undef;
7048         binmode STDOUT, ':raw';
7049         print <$fd>;
7050         binmode STDOUT, ':utf8'; # as set at the beginning of gitweb.cgi
7051         close $fd;
7052 }
7053
7054 sub git_blob {
7055         my $expires;
7056
7057         if (!defined $hash) {
7058                 if (defined $file_name) {
7059                         my $base = $hash_base || git_get_head_hash($project);
7060                         $hash = git_get_hash_by_path($base, $file_name, "blob")
7061                                 or die_error(404, "Cannot find file");
7062                 } else {
7063                         die_error(400, "No file name defined");
7064                 }
7065         } elsif ($hash =~ m/^[0-9a-fA-F]{40}$/) {
7066                 # blobs defined by non-textual hash id's can be cached
7067                 $expires = "+1d";
7068         }
7069
7070         my $have_blame = gitweb_check_feature('blame');
7071         open my $fd, "-|", git_cmd(), "cat-file", "blob", $hash
7072                 or die_error(500, "Couldn't cat $file_name, $hash");
7073         my $mimetype = blob_mimetype($fd, $file_name);
7074         # use 'blob_plain' (aka 'raw') view for files that cannot be displayed
7075         if ($mimetype !~ m!^(?:text/|image/(?:gif|png|jpeg)$)! && -B $fd) {
7076                 close $fd;
7077                 return git_blob_plain($mimetype);
7078         }
7079         # we can have blame only for text/* mimetype
7080         $have_blame &&= ($mimetype =~ m!^text/!);
7081
7082         my $highlight = gitweb_check_feature('highlight');
7083         my $syntax = guess_file_syntax($highlight, $mimetype, $file_name);
7084         $fd = run_highlighter($fd, $highlight, $syntax)
7085                 if $syntax;
7086
7087         git_header_html(undef, $expires);
7088         my $formats_nav = '';
7089         if (defined $hash_base && (my %co = parse_commit($hash_base))) {
7090                 if (defined $file_name) {
7091                         if ($have_blame) {
7092                                 $formats_nav .=
7093                                         $cgi->a({-href => href(action=>"blame", -replay=>1)},
7094                                                 "blame") .
7095                                         " | ";
7096                         }
7097                         $formats_nav .=
7098                                 $cgi->a({-href => href(action=>"history", -replay=>1)},
7099                                         "history") .
7100                                 " | " .
7101                                 $cgi->a({-href => href(action=>"blob_plain", -replay=>1)},
7102                                         "raw") .
7103                                 " | " .
7104                                 $cgi->a({-href => href(action=>"blob",
7105                                                        hash_base=>"HEAD", file_name=>$file_name)},
7106                                         "HEAD");
7107                 } else {
7108                         $formats_nav .=
7109                                 $cgi->a({-href => href(action=>"blob_plain", -replay=>1)},
7110                                         "raw");
7111                 }
7112                 git_print_page_nav('','', $hash_base,$co{'tree'},$hash_base, $formats_nav);
7113                 git_print_header_div('commit', esc_html($co{'title'}), $hash_base);
7114         } else {
7115                 print "<div class=\"page_nav\">\n" .
7116                       "<br/><br/></div>\n" .
7117                       "<div class=\"title\">".esc_html($hash)."</div>\n";
7118         }
7119         git_print_page_path($file_name, "blob", $hash_base);
7120         print "<div class=\"page_body\">\n";
7121         if ($mimetype =~ m!^image/!) {
7122                 print qq!<img class="blob" type="!.esc_attr($mimetype).qq!"!;
7123                 if ($file_name) {
7124                         print qq! alt="!.esc_attr($file_name).qq!" title="!.esc_attr($file_name).qq!"!;
7125                 }
7126                 print qq! src="! .
7127                       href(action=>"blob_plain", hash=>$hash,
7128                            hash_base=>$hash_base, file_name=>$file_name) .
7129                       qq!" />\n!;
7130         } else {
7131                 my $nr;
7132                 while (my $line = <$fd>) {
7133                         chomp $line;
7134                         $nr++;
7135                         $line = untabify($line);
7136                         printf qq!<div class="pre"><a id="l%i" href="%s#l%i" class="linenr">%4i</a> %s</div>\n!,
7137                                $nr, esc_attr(href(-replay => 1)), $nr, $nr,
7138                                $syntax ? sanitize($line) : esc_html($line, -nbsp=>1);
7139                 }
7140         }
7141         close $fd
7142                 or print "Reading blob failed.\n";
7143         print "</div>";
7144         git_footer_html();
7145 }
7146
7147 sub git_tree {
7148         if (!defined $hash_base) {
7149                 $hash_base = "HEAD";
7150         }
7151         if (!defined $hash) {
7152                 if (defined $file_name) {
7153                         $hash = git_get_hash_by_path($hash_base, $file_name, "tree");
7154                 } else {
7155                         $hash = $hash_base;
7156                 }
7157         }
7158         die_error(404, "No such tree") unless defined($hash);
7159
7160         my $show_sizes = gitweb_check_feature('show-sizes');
7161         my $have_blame = gitweb_check_feature('blame');
7162
7163         my @entries = ();
7164         {
7165                 local $/ = "\0";
7166                 open my $fd, "-|", git_cmd(), "ls-tree", '-z',
7167                         ($show_sizes ? '-l' : ()), @extra_options, $hash
7168                         or die_error(500, "Open git-ls-tree failed");
7169                 @entries = map { chomp; $_ } <$fd>;
7170                 close $fd
7171                         or die_error(404, "Reading tree failed");
7172         }
7173
7174         my $refs = git_get_references();
7175         my $ref = format_ref_marker($refs, $hash_base);
7176         git_header_html();
7177         my $basedir = '';
7178         if (defined $hash_base && (my %co = parse_commit($hash_base))) {
7179                 my @views_nav = ();
7180                 if (defined $file_name) {
7181                         push @views_nav,
7182                                 $cgi->a({-href => href(action=>"history", -replay=>1)},
7183                                         "history"),
7184                                 $cgi->a({-href => href(action=>"tree",
7185                                                        hash_base=>"HEAD", file_name=>$file_name)},
7186                                         "HEAD"),
7187                 }
7188                 my $snapshot_links = format_snapshot_links($hash);
7189                 if (defined $snapshot_links) {
7190                         # FIXME: Should be available when we have no hash base as well.
7191                         push @views_nav, $snapshot_links;
7192                 }
7193                 git_print_page_nav('tree','', $hash_base, undef, undef,
7194                                    join(' | ', @views_nav));
7195                 git_print_header_div('commit', esc_html($co{'title'}) . $ref, $hash_base);
7196         } else {
7197                 undef $hash_base;
7198                 print "<div class=\"page_nav\">\n";
7199                 print "<br/><br/></div>\n";
7200                 print "<div class=\"title\">".esc_html($hash)."</div>\n";
7201         }
7202         if (defined $file_name) {
7203                 $basedir = $file_name;
7204                 if ($basedir ne '' && substr($basedir, -1) ne '/') {
7205                         $basedir .= '/';
7206                 }
7207                 git_print_page_path($file_name, 'tree', $hash_base);
7208         }
7209         print "<div class=\"page_body\">\n";
7210         print "<table class=\"tree\">\n";
7211         my $alternate = 1;
7212         # '..' (top directory) link if possible
7213         if (defined $hash_base &&
7214             defined $file_name && $file_name =~ m![^/]+$!) {
7215                 if ($alternate) {
7216                         print "<tr class=\"dark\">\n";
7217                 } else {
7218                         print "<tr class=\"light\">\n";
7219                 }
7220                 $alternate ^= 1;
7221
7222                 my $up = $file_name;
7223                 $up =~ s!/?[^/]+$!!;
7224                 undef $up unless $up;
7225                 # based on git_print_tree_entry
7226                 print '<td class="mode">' . mode_str('040000') . "</td>\n";
7227                 print '<td class="size">&nbsp;</td>'."\n" if $show_sizes;
7228                 print '<td class="list">';
7229                 print $cgi->a({-href => href(action=>"tree",
7230                                              hash_base=>$hash_base,
7231                                              file_name=>$up)},
7232                               "..");
7233                 print "</td>\n";
7234                 print "<td class=\"link\"></td>\n";
7235
7236                 print "</tr>\n";
7237         }
7238         foreach my $line (@entries) {
7239                 my %t = parse_ls_tree_line($line, -z => 1, -l => $show_sizes);
7240
7241                 if ($alternate) {
7242                         print "<tr class=\"dark\">\n";
7243                 } else {
7244                         print "<tr class=\"light\">\n";
7245                 }
7246                 $alternate ^= 1;
7247
7248                 git_print_tree_entry(\%t, $basedir, $hash_base, $have_blame);
7249
7250                 print "</tr>\n";
7251         }
7252         print "</table>\n" .
7253               "</div>";
7254         git_footer_html();
7255 }
7256
7257 sub sanitize_for_filename {
7258     my $name = shift;
7259
7260     $name =~ s!/!-!g;
7261     $name =~ s/[^[:alnum:]_.-]//g;
7262
7263     return $name;
7264 }
7265
7266 sub snapshot_name {
7267         my ($project, $hash) = @_;
7268
7269         # path/to/project.git  -> project
7270         # path/to/project/.git -> project
7271         my $name = to_utf8($project);
7272         $name =~ s,([^/])/*\.git$,$1,;
7273         $name = sanitize_for_filename(basename($name));
7274
7275         my $ver = $hash;
7276         if ($hash =~ /^[0-9a-fA-F]+$/) {
7277                 # shorten SHA-1 hash
7278                 my $full_hash = git_get_full_hash($project, $hash);
7279                 if ($full_hash =~ /^$hash/ && length($hash) > 7) {
7280                         $ver = git_get_short_hash($project, $hash);
7281                 }
7282         } elsif ($hash =~ m!^refs/tags/(.*)$!) {
7283                 # tags don't need shortened SHA-1 hash
7284                 $ver = $1;
7285         } else {
7286                 # branches and other need shortened SHA-1 hash
7287                 my $strip_refs = join '|', map { quotemeta } get_branch_refs();
7288                 if ($hash =~ m!^refs/($strip_refs|remotes)/(.*)$!) {
7289                         my $ref_dir = (defined $1) ? $1 : '';
7290                         $ver = $2;
7291
7292                         $ref_dir = sanitize_for_filename($ref_dir);
7293                         # for refs neither in heads nor remotes we want to
7294                         # add a ref dir to archive name
7295                         if ($ref_dir ne '' and $ref_dir ne 'heads' and $ref_dir ne 'remotes') {
7296                                 $ver = $ref_dir . '-' . $ver;
7297                         }
7298                 }
7299                 $ver .= '-' . git_get_short_hash($project, $hash);
7300         }
7301         # special case of sanitization for filename - we change
7302         # slashes to dots instead of dashes
7303         # in case of hierarchical branch names
7304         $ver =~ s!/!.!g;
7305         $ver =~ s/[^[:alnum:]_.-]//g;
7306
7307         # name = project-version_string
7308         $name = "$name-$ver";
7309
7310         return wantarray ? ($name, $name) : $name;
7311 }
7312
7313 sub exit_if_unmodified_since {
7314         my ($latest_epoch) = @_;
7315         our $cgi;
7316
7317         my $if_modified = $cgi->http('IF_MODIFIED_SINCE');
7318         if (defined $if_modified) {
7319                 my $since;
7320                 if (eval { require HTTP::Date; 1; }) {
7321                         $since = HTTP::Date::str2time($if_modified);
7322                 } elsif (eval { require Time::ParseDate; 1; }) {
7323                         $since = Time::ParseDate::parsedate($if_modified, GMT => 1);
7324                 }
7325                 if (defined $since && $latest_epoch <= $since) {
7326                         my %latest_date = parse_date($latest_epoch);
7327                         print $cgi->header(
7328                                 -last_modified => $latest_date{'rfc2822'},
7329                                 -status => '304 Not Modified');
7330                         goto DONE_GITWEB;
7331                 }
7332         }
7333 }
7334
7335 sub git_snapshot {
7336         my $format = $input_params{'snapshot_format'};
7337         if (!@snapshot_fmts) {
7338                 die_error(403, "Snapshots not allowed");
7339         }
7340         # default to first supported snapshot format
7341         $format ||= $snapshot_fmts[0];
7342         if ($format !~ m/^[a-z0-9]+$/) {
7343                 die_error(400, "Invalid snapshot format parameter");
7344         } elsif (!exists($known_snapshot_formats{$format})) {
7345                 die_error(400, "Unknown snapshot format");
7346         } elsif ($known_snapshot_formats{$format}{'disabled'}) {
7347                 die_error(403, "Snapshot format not allowed");
7348         } elsif (!grep($_ eq $format, @snapshot_fmts)) {
7349                 die_error(403, "Unsupported snapshot format");
7350         }
7351
7352         my $type = git_get_type("$hash^{}");
7353         if (!$type) {
7354                 die_error(404, 'Object does not exist');
7355         }  elsif ($type eq 'blob') {
7356                 die_error(400, 'Object is not a tree-ish');
7357         }
7358
7359         my ($name, $prefix) = snapshot_name($project, $hash);
7360         my $filename = "$name$known_snapshot_formats{$format}{'suffix'}";
7361
7362         my %co = parse_commit($hash);
7363         exit_if_unmodified_since($co{'committer_epoch'}) if %co;
7364
7365         my $cmd = quote_command(
7366                 git_cmd(), 'archive',
7367                 "--format=$known_snapshot_formats{$format}{'format'}",
7368                 "--prefix=$prefix/", $hash);
7369         if (exists $known_snapshot_formats{$format}{'compressor'}) {
7370                 $cmd .= ' | ' . quote_command(@{$known_snapshot_formats{$format}{'compressor'}});
7371         }
7372
7373         $filename =~ s/(["\\])/\\$1/g;
7374         my %latest_date;
7375         if (%co) {
7376                 %latest_date = parse_date($co{'committer_epoch'}, $co{'committer_tz'});
7377         }
7378
7379         print $cgi->header(
7380                 -type => $known_snapshot_formats{$format}{'type'},
7381                 -content_disposition => 'inline; filename="' . $filename . '"',
7382                 %co ? (-last_modified => $latest_date{'rfc2822'}) : (),
7383                 -status => '200 OK');
7384
7385         open my $fd, "-|", $cmd
7386                 or die_error(500, "Execute git-archive failed");
7387         binmode STDOUT, ':raw';
7388         print <$fd>;
7389         binmode STDOUT, ':utf8'; # as set at the beginning of gitweb.cgi
7390         close $fd;
7391 }
7392
7393 sub git_log_generic {
7394         my ($fmt_name, $body_subr, $base, $parent, $file_name, $file_hash) = @_;
7395
7396         my $head = git_get_head_hash($project);
7397         if (!defined $base) {
7398                 $base = $head;
7399         }
7400         if (!defined $page) {
7401                 $page = 0;
7402         }
7403         my $refs = git_get_references();
7404
7405         my $commit_hash = $base;
7406         if (defined $parent) {
7407                 $commit_hash = "$parent..$base";
7408         }
7409         my @commitlist =
7410                 parse_commits($commit_hash, 101, (100 * $page),
7411                               defined $file_name ? ($file_name, "--full-history") : ());
7412
7413         my $ftype;
7414         if (!defined $file_hash && defined $file_name) {
7415                 # some commits could have deleted file in question,
7416                 # and not have it in tree, but one of them has to have it
7417                 for (my $i = 0; $i < @commitlist; $i++) {
7418                         $file_hash = git_get_hash_by_path($commitlist[$i]{'id'}, $file_name);
7419                         last if defined $file_hash;
7420                 }
7421         }
7422         if (defined $file_hash) {
7423                 $ftype = git_get_type($file_hash);
7424         }
7425         if (defined $file_name && !defined $ftype) {
7426                 die_error(500, "Unknown type of object");
7427         }
7428         my %co;
7429         if (defined $file_name) {
7430                 %co = parse_commit($base)
7431                         or die_error(404, "Unknown commit object");
7432         }
7433
7434
7435         my $paging_nav = format_log_nav($fmt_name, $page, $#commitlist >= 100);
7436         my $next_link = '';
7437         if ($#commitlist >= 100) {
7438                 $next_link =
7439                         $cgi->a({-href => href(-replay=>1, page=>$page+1),
7440                                  -accesskey => "n", -title => "Alt-n"}, "next");
7441         }
7442         my $patch_max = gitweb_get_feature('patches');
7443         if ($patch_max && !defined $file_name) {
7444                 if ($patch_max < 0 || @commitlist <= $patch_max) {
7445                         $paging_nav .= " &sdot; " .
7446                                 $cgi->a({-href => href(action=>"patches", -replay=>1)},
7447                                         "patches");
7448                 }
7449         }
7450
7451         {
7452                 local $action = 'fulllog';
7453                 git_header_html();
7454         }
7455         git_print_page_nav($fmt_name,'', $hash,$hash,$hash, $paging_nav);
7456         if (defined $file_name) {
7457                 git_print_header_div('commit', esc_html($co{'title'}), $base);
7458         } else {
7459                 git_print_header_div('summary', $project)
7460         }
7461         git_print_page_path($file_name, $ftype, $hash_base)
7462                 if (defined $file_name);
7463
7464         $body_subr->(\@commitlist, 0, 99, $refs, $next_link,
7465                      $file_name, $file_hash, $ftype);
7466
7467         git_footer_html();
7468 }
7469
7470 sub git_log {
7471         git_log_generic('log', \&git_log_body,
7472                         $hash, $hash_parent);
7473 }
7474
7475 sub git_commit {
7476         $hash ||= $hash_base || "HEAD";
7477         my %co = parse_commit($hash)
7478             or die_error(404, "Unknown commit object");
7479
7480         my $parent  = $co{'parent'};
7481         my $parents = $co{'parents'}; # listref
7482
7483         # we need to prepare $formats_nav before any parameter munging
7484         my $formats_nav;
7485         if (!defined $parent) {
7486                 # --root commitdiff
7487                 $formats_nav .= '(initial)';
7488         } elsif (@$parents == 1) {
7489                 # single parent commit
7490                 $formats_nav .=
7491                         '(parent: ' .
7492                         $cgi->a({-href => href(action=>"commit",
7493                                                hash=>$parent)},
7494                                 esc_html(substr($parent, 0, 7))) .
7495                         ')';
7496         } else {
7497                 # merge commit
7498                 $formats_nav .=
7499                         '(merge: ' .
7500                         join(' ', map {
7501                                 $cgi->a({-href => href(action=>"commit",
7502                                                        hash=>$_)},
7503                                         esc_html(substr($_, 0, 7)));
7504                         } @$parents ) .
7505                         ')';
7506         }
7507         if (gitweb_check_feature('patches') && @$parents <= 1) {
7508                 $formats_nav .= " | " .
7509                         $cgi->a({-href => href(action=>"patch", -replay=>1)},
7510                                 "patch");
7511         }
7512
7513         if (!defined $parent) {
7514                 $parent = "--root";
7515         }
7516         my @difftree;
7517         open my $fd, "-|", git_cmd(), "diff-tree", '-r', "--no-commit-id",
7518                 @diff_opts,
7519                 (@$parents <= 1 ? $parent : '-c'),
7520                 $hash, "--"
7521                 or die_error(500, "Open git-diff-tree failed");
7522         @difftree = map { chomp; $_ } <$fd>;
7523         close $fd or die_error(404, "Reading git-diff-tree failed");
7524
7525         # non-textual hash id's can be cached
7526         my $expires;
7527         if ($hash =~ m/^[0-9a-fA-F]{40}$/) {
7528                 $expires = "+1d";
7529         }
7530         my $refs = git_get_references();
7531         my $ref = format_ref_marker($refs, $co{'id'});
7532
7533         git_header_html(undef, $expires);
7534         git_print_page_nav('commit', '',
7535                            $hash, $co{'tree'}, $hash,
7536                            $formats_nav);
7537
7538         if (defined $co{'parent'}) {
7539                 git_print_header_div('commitdiff', esc_html($co{'title'}) . $ref, $hash);
7540         } else {
7541                 git_print_header_div('tree', esc_html($co{'title'}) . $ref, $co{'tree'}, $hash);
7542         }
7543         print "<div class=\"title_text\">\n" .
7544               "<table class=\"object_header\">\n";
7545         git_print_authorship_rows(\%co);
7546         print "<tr><td>commit</td><td class=\"sha1\">$co{'id'}</td></tr>\n";
7547         print "<tr>" .
7548               "<td>tree</td>" .
7549               "<td class=\"sha1\">" .
7550               $cgi->a({-href => href(action=>"tree", hash=>$co{'tree'}, hash_base=>$hash),
7551                        class => "list"}, $co{'tree'}) .
7552               "</td>" .
7553               "<td class=\"link\">" .
7554               $cgi->a({-href => href(action=>"tree", hash=>$co{'tree'}, hash_base=>$hash)},
7555                       "tree");
7556         my $snapshot_links = format_snapshot_links($hash);
7557         if (defined $snapshot_links) {
7558                 print " | " . $snapshot_links;
7559         }
7560         print "</td>" .
7561               "</tr>\n";
7562
7563         foreach my $par (@$parents) {
7564                 print "<tr>" .
7565                       "<td>parent</td>" .
7566                       "<td class=\"sha1\">" .
7567                       $cgi->a({-href => href(action=>"commit", hash=>$par),
7568                                class => "list"}, $par) .
7569                       "</td>" .
7570                       "<td class=\"link\">" .
7571                       $cgi->a({-href => href(action=>"commit", hash=>$par)}, "commit") .
7572                       " | " .
7573                       $cgi->a({-href => href(action=>"commitdiff", hash=>$hash, hash_parent=>$par)}, "diff") .
7574                       "</td>" .
7575                       "</tr>\n";
7576         }
7577         print "</table>".
7578               "</div>\n";
7579
7580         print "<div class=\"page_body\">\n";
7581         git_print_log($co{'comment'});
7582         print "</div>\n";
7583
7584         git_difftree_body(\@difftree, $hash, @$parents);
7585
7586         git_footer_html();
7587 }
7588
7589 sub git_object {
7590         # object is defined by:
7591         # - hash or hash_base alone
7592         # - hash_base and file_name
7593         my $type;
7594
7595         # - hash or hash_base alone
7596         if ($hash || ($hash_base && !defined $file_name)) {
7597                 my $object_id = $hash || $hash_base;
7598
7599                 open my $fd, "-|", quote_command(
7600                         git_cmd(), 'cat-file', '-t', $object_id) . ' 2> /dev/null'
7601                         or die_error(404, "Object does not exist");
7602                 $type = <$fd>;
7603                 chomp $type;
7604                 close $fd
7605                         or die_error(404, "Object does not exist");
7606
7607         # - hash_base and file_name
7608         } elsif ($hash_base && defined $file_name) {
7609                 $file_name =~ s,/+$,,;
7610
7611                 system(git_cmd(), "cat-file", '-e', $hash_base) == 0
7612                         or die_error(404, "Base object does not exist");
7613
7614                 # here errors should not happen
7615                 open my $fd, "-|", git_cmd(), "ls-tree", $hash_base, "--", $file_name
7616                         or die_error(500, "Open git-ls-tree failed");
7617                 my $line = <$fd>;
7618                 close $fd;
7619
7620                 #'100644 blob 0fa3f3a66fb6a137f6ec2c19351ed4d807070ffa  panic.c'
7621                 unless ($line && $line =~ m/^([0-9]+) (.+) ([0-9a-fA-F]{40})\t/) {
7622                         die_error(404, "File or directory for given base does not exist");
7623                 }
7624                 $type = $2;
7625                 $hash = $3;
7626         } else {
7627                 die_error(400, "Not enough information to find object");
7628         }
7629
7630         print $cgi->redirect(-uri => href(action=>$type, -full=>1,
7631                                           hash=>$hash, hash_base=>$hash_base,
7632                                           file_name=>$file_name),
7633                              -status => '302 Found');
7634 }
7635
7636 sub git_blobdiff {
7637         my $format = shift || 'html';
7638         my $diff_style = $input_params{'diff_style'} || 'inline';
7639
7640         my $fd;
7641         my @difftree;
7642         my %diffinfo;
7643         my $expires;
7644
7645         # preparing $fd and %diffinfo for git_patchset_body
7646         # new style URI
7647         if (defined $hash_base && defined $hash_parent_base) {
7648                 if (defined $file_name) {
7649                         # read raw output
7650                         open $fd, "-|", git_cmd(), "diff-tree", '-r', @diff_opts,
7651                                 $hash_parent_base, $hash_base,
7652                                 "--", (defined $file_parent ? $file_parent : ()), $file_name
7653                                 or die_error(500, "Open git-diff-tree failed");
7654                         @difftree = map { chomp; $_ } <$fd>;
7655                         close $fd
7656                                 or die_error(404, "Reading git-diff-tree failed");
7657                         @difftree
7658                                 or die_error(404, "Blob diff not found");
7659
7660                 } elsif (defined $hash &&
7661                          $hash =~ /[0-9a-fA-F]{40}/) {
7662                         # try to find filename from $hash
7663
7664                         # read filtered raw output
7665                         open $fd, "-|", git_cmd(), "diff-tree", '-r', @diff_opts,
7666                                 $hash_parent_base, $hash_base, "--"
7667                                 or die_error(500, "Open git-diff-tree failed");
7668                         @difftree =
7669                                 # ':100644 100644 03b21826... 3b93d5e7... M     ls-files.c'
7670                                 # $hash == to_id
7671                                 grep { /^:[0-7]{6} [0-7]{6} [0-9a-fA-F]{40} $hash/ }
7672                                 map { chomp; $_ } <$fd>;
7673                         close $fd
7674                                 or die_error(404, "Reading git-diff-tree failed");
7675                         @difftree
7676                                 or die_error(404, "Blob diff not found");
7677
7678                 } else {
7679                         die_error(400, "Missing one of the blob diff parameters");
7680                 }
7681
7682                 if (@difftree > 1) {
7683                         die_error(400, "Ambiguous blob diff specification");
7684                 }
7685
7686                 %diffinfo = parse_difftree_raw_line($difftree[0]);
7687                 $file_parent ||= $diffinfo{'from_file'} || $file_name;
7688                 $file_name   ||= $diffinfo{'to_file'};
7689
7690                 $hash_parent ||= $diffinfo{'from_id'};
7691                 $hash        ||= $diffinfo{'to_id'};
7692
7693                 # non-textual hash id's can be cached
7694                 if ($hash_base =~ m/^[0-9a-fA-F]{40}$/ &&
7695                     $hash_parent_base =~ m/^[0-9a-fA-F]{40}$/) {
7696                         $expires = '+1d';
7697                 }
7698
7699                 # open patch output
7700                 open $fd, "-|", git_cmd(), "diff-tree", '-r', @diff_opts,
7701                         '-p', ($format eq 'html' ? "--full-index" : ()),
7702                         $hash_parent_base, $hash_base,
7703                         "--", (defined $file_parent ? $file_parent : ()), $file_name
7704                         or die_error(500, "Open git-diff-tree failed");
7705         }
7706
7707         # old/legacy style URI -- not generated anymore since 1.4.3.
7708         if (!%diffinfo) {
7709                 die_error('404 Not Found', "Missing one of the blob diff parameters")
7710         }
7711
7712         # header
7713         if ($format eq 'html') {
7714                 my $formats_nav =
7715                         $cgi->a({-href => href(action=>"blobdiff_plain", -replay=>1)},
7716                                 "raw");
7717                 $formats_nav .= diff_style_nav($diff_style);
7718                 git_header_html(undef, $expires);
7719                 if (defined $hash_base && (my %co = parse_commit($hash_base))) {
7720                         git_print_page_nav('','', $hash_base,$co{'tree'},$hash_base, $formats_nav);
7721                         git_print_header_div('commit', esc_html($co{'title'}), $hash_base);
7722                 } else {
7723                         print "<div class=\"page_nav\"><br/>$formats_nav<br/></div>\n";
7724                         print "<div class=\"title\">".esc_html("$hash vs $hash_parent")."</div>\n";
7725                 }
7726                 if (defined $file_name) {
7727                         git_print_page_path($file_name, "blob", $hash_base);
7728                 } else {
7729                         print "<div class=\"page_path\"></div>\n";
7730                 }
7731
7732         } elsif ($format eq 'plain') {
7733                 print $cgi->header(
7734                         -type => 'text/plain',
7735                         -charset => 'utf-8',
7736                         -expires => $expires,
7737                         -content_disposition => 'inline; filename="' . "$file_name" . '.patch"');
7738
7739                 print "X-Git-Url: " . $cgi->self_url() . "\n\n";
7740
7741         } else {
7742                 die_error(400, "Unknown blobdiff format");
7743         }
7744
7745         # patch
7746         if ($format eq 'html') {
7747                 print "<div class=\"page_body\">\n";
7748
7749                 git_patchset_body($fd, $diff_style,
7750                                   [ \%diffinfo ], $hash_base, $hash_parent_base);
7751                 close $fd;
7752
7753                 print "</div>\n"; # class="page_body"
7754                 git_footer_html();
7755
7756         } else {
7757                 while (my $line = <$fd>) {
7758                         $line =~ s!a/($hash|$hash_parent)!'a/'.esc_path($diffinfo{'from_file'})!eg;
7759                         $line =~ s!b/($hash|$hash_parent)!'b/'.esc_path($diffinfo{'to_file'})!eg;
7760
7761                         print $line;
7762
7763                         last if $line =~ m!^\+\+\+!;
7764                 }
7765                 local $/ = undef;
7766                 print <$fd>;
7767                 close $fd;
7768         }
7769 }
7770
7771 sub git_blobdiff_plain {
7772         git_blobdiff('plain');
7773 }
7774
7775 # assumes that it is added as later part of already existing navigation,
7776 # so it returns "| foo | bar" rather than just "foo | bar"
7777 sub diff_style_nav {
7778         my ($diff_style, $is_combined) = @_;
7779         $diff_style ||= 'inline';
7780
7781         return "" if ($is_combined);
7782
7783         my @styles = (inline => 'inline', 'sidebyside' => 'side by side');
7784         my %styles = @styles;
7785         @styles =
7786                 @styles[ map { $_ * 2 } 0..$#styles/2 ];
7787
7788         return join '',
7789                 map { " | ".$_ }
7790                 map {
7791                         $_ eq $diff_style ? $styles{$_} :
7792                         $cgi->a({-href => href(-replay=>1, diff_style => $_)}, $styles{$_})
7793                 } @styles;
7794 }
7795
7796 sub git_commitdiff {
7797         my %params = @_;
7798         my $format = $params{-format} || 'html';
7799         my $diff_style = $input_params{'diff_style'} || 'inline';
7800
7801         my ($patch_max) = gitweb_get_feature('patches');
7802         if ($format eq 'patch') {
7803                 die_error(403, "Patch view not allowed") unless $patch_max;
7804         }
7805
7806         $hash ||= $hash_base || "HEAD";
7807         my %co = parse_commit($hash)
7808             or die_error(404, "Unknown commit object");
7809
7810         # choose format for commitdiff for merge
7811         if (! defined $hash_parent && @{$co{'parents'}} > 1) {
7812                 $hash_parent = '--cc';
7813         }
7814         # we need to prepare $formats_nav before almost any parameter munging
7815         my $formats_nav;
7816         if ($format eq 'html') {
7817                 $formats_nav =
7818                         $cgi->a({-href => href(action=>"commitdiff_plain", -replay=>1)},
7819                                 "raw");
7820                 if ($patch_max && @{$co{'parents'}} <= 1) {
7821                         $formats_nav .= " | " .
7822                                 $cgi->a({-href => href(action=>"patch", -replay=>1)},
7823                                         "patch");
7824                 }
7825                 $formats_nav .= diff_style_nav($diff_style, @{$co{'parents'}} > 1);
7826
7827                 if (defined $hash_parent &&
7828                     $hash_parent ne '-c' && $hash_parent ne '--cc') {
7829                         # commitdiff with two commits given
7830                         my $hash_parent_short = $hash_parent;
7831                         if ($hash_parent =~ m/^[0-9a-fA-F]{40}$/) {
7832                                 $hash_parent_short = substr($hash_parent, 0, 7);
7833                         }
7834                         $formats_nav .=
7835                                 ' (from';
7836                         for (my $i = 0; $i < @{$co{'parents'}}; $i++) {
7837                                 if ($co{'parents'}[$i] eq $hash_parent) {
7838                                         $formats_nav .= ' parent ' . ($i+1);
7839                                         last;
7840                                 }
7841                         }
7842                         $formats_nav .= ': ' .
7843                                 $cgi->a({-href => href(-replay=>1,
7844                                                        hash=>$hash_parent, hash_base=>undef)},
7845                                         esc_html($hash_parent_short)) .
7846                                 ')';
7847                 } elsif (!$co{'parent'}) {
7848                         # --root commitdiff
7849                         $formats_nav .= ' (initial)';
7850                 } elsif (scalar @{$co{'parents'}} == 1) {
7851                         # single parent commit
7852                         $formats_nav .=
7853                                 ' (parent: ' .
7854                                 $cgi->a({-href => href(-replay=>1,
7855                                                        hash=>$co{'parent'}, hash_base=>undef)},
7856                                         esc_html(substr($co{'parent'}, 0, 7))) .
7857                                 ')';
7858                 } else {
7859                         # merge commit
7860                         if ($hash_parent eq '--cc') {
7861                                 $formats_nav .= ' | ' .
7862                                         $cgi->a({-href => href(-replay=>1,
7863                                                                hash=>$hash, hash_parent=>'-c')},
7864                                                 'combined');
7865                         } else { # $hash_parent eq '-c'
7866                                 $formats_nav .= ' | ' .
7867                                         $cgi->a({-href => href(-replay=>1,
7868                                                                hash=>$hash, hash_parent=>'--cc')},
7869                                                 'compact');
7870                         }
7871                         $formats_nav .=
7872                                 ' (merge: ' .
7873                                 join(' ', map {
7874                                         $cgi->a({-href => href(-replay=>1,
7875                                                                hash=>$_, hash_base=>undef)},
7876                                                 esc_html(substr($_, 0, 7)));
7877                                 } @{$co{'parents'}} ) .
7878                                 ')';
7879                 }
7880         }
7881
7882         my $hash_parent_param = $hash_parent;
7883         if (!defined $hash_parent_param) {
7884                 # --cc for multiple parents, --root for parentless
7885                 $hash_parent_param =
7886                         @{$co{'parents'}} > 1 ? '--cc' : $co{'parent'} || '--root';
7887         }
7888
7889         # read commitdiff
7890         my $fd;
7891         my @difftree;
7892         if ($format eq 'html') {
7893                 open $fd, "-|", git_cmd(), "diff-tree", '-r', @diff_opts,
7894                         "--no-commit-id", "--patch-with-raw", "--full-index",
7895                         $hash_parent_param, $hash, "--"
7896                         or die_error(500, "Open git-diff-tree failed");
7897
7898                 while (my $line = <$fd>) {
7899                         chomp $line;
7900                         # empty line ends raw part of diff-tree output
7901                         last unless $line;
7902                         push @difftree, scalar parse_difftree_raw_line($line);
7903                 }
7904
7905         } elsif ($format eq 'plain') {
7906                 open $fd, "-|", git_cmd(), "diff-tree", '-r', @diff_opts,
7907                         '-p', $hash_parent_param, $hash, "--"
7908                         or die_error(500, "Open git-diff-tree failed");
7909         } elsif ($format eq 'patch') {
7910                 # For commit ranges, we limit the output to the number of
7911                 # patches specified in the 'patches' feature.
7912                 # For single commits, we limit the output to a single patch,
7913                 # diverging from the git-format-patch default.
7914                 my @commit_spec = ();
7915                 if ($hash_parent) {
7916                         if ($patch_max > 0) {
7917                                 push @commit_spec, "-$patch_max";
7918                         }
7919                         push @commit_spec, '-n', "$hash_parent..$hash";
7920                 } else {
7921                         if ($params{-single}) {
7922                                 push @commit_spec, '-1';
7923                         } else {
7924                                 if ($patch_max > 0) {
7925                                         push @commit_spec, "-$patch_max";
7926                                 }
7927                                 push @commit_spec, "-n";
7928                         }
7929                         push @commit_spec, '--root', $hash;
7930                 }
7931                 open $fd, "-|", git_cmd(), "format-patch", @diff_opts,
7932                         '--encoding=utf8', '--stdout', @commit_spec
7933                         or die_error(500, "Open git-format-patch failed");
7934         } else {
7935                 die_error(400, "Unknown commitdiff format");
7936         }
7937
7938         # non-textual hash id's can be cached
7939         my $expires;
7940         if ($hash =~ m/^[0-9a-fA-F]{40}$/) {
7941                 $expires = "+1d";
7942         }
7943
7944         # write commit message
7945         if ($format eq 'html') {
7946                 my $refs = git_get_references();
7947                 my $ref = format_ref_marker($refs, $co{'id'});
7948
7949                 git_header_html(undef, $expires);
7950                 git_print_page_nav('commitdiff','', $hash,$co{'tree'},$hash, $formats_nav);
7951                 git_print_header_div('commit', esc_html($co{'title'}) . $ref, $hash);
7952                 print "<div class=\"title_text\">\n" .
7953                       "<table class=\"object_header\">\n";
7954                 git_print_authorship_rows(\%co);
7955                 print "</table>".
7956                       "</div>\n";
7957                 print "<div class=\"page_body\">\n";
7958                 if (@{$co{'comment'}} > 1) {
7959                         print "<div class=\"log\">\n";
7960                         git_print_log($co{'comment'}, -final_empty_line=> 1, -remove_title => 1);
7961                         print "</div>\n"; # class="log"
7962                 }
7963
7964         } elsif ($format eq 'plain') {
7965                 my $refs = git_get_references("tags");
7966                 my $tagname = git_get_rev_name_tags($hash);
7967                 my $filename = basename($project) . "-$hash.patch";
7968
7969                 print $cgi->header(
7970                         -type => 'text/plain',
7971                         -charset => 'utf-8',
7972                         -expires => $expires,
7973                         -content_disposition => 'inline; filename="' . "$filename" . '"');
7974                 my %ad = parse_date($co{'author_epoch'}, $co{'author_tz'});
7975                 print "From: " . to_utf8($co{'author'}) . "\n";
7976                 print "Date: $ad{'rfc2822'} ($ad{'tz_local'})\n";
7977                 print "Subject: " . to_utf8($co{'title'}) . "\n";
7978
7979                 print "X-Git-Tag: $tagname\n" if $tagname;
7980                 print "X-Git-Url: " . $cgi->self_url() . "\n\n";
7981
7982                 foreach my $line (@{$co{'comment'}}) {
7983                         print to_utf8($line) . "\n";
7984                 }
7985                 print "---\n\n";
7986         } elsif ($format eq 'patch') {
7987                 my $filename = basename($project) . "-$hash.patch";
7988
7989                 print $cgi->header(
7990                         -type => 'text/plain',
7991                         -charset => 'utf-8',
7992                         -expires => $expires,
7993                         -content_disposition => 'inline; filename="' . "$filename" . '"');
7994         }
7995
7996         # write patch
7997         if ($format eq 'html') {
7998                 my $use_parents = !defined $hash_parent ||
7999                         $hash_parent eq '-c' || $hash_parent eq '--cc';
8000                 git_difftree_body(\@difftree, $hash,
8001                                   $use_parents ? @{$co{'parents'}} : $hash_parent);
8002                 print "<br/>\n";
8003
8004                 git_patchset_body($fd, $diff_style,
8005                                   \@difftree, $hash,
8006                                   $use_parents ? @{$co{'parents'}} : $hash_parent);
8007                 close $fd;
8008                 print "</div>\n"; # class="page_body"
8009                 git_footer_html();
8010
8011         } elsif ($format eq 'plain') {
8012                 local $/ = undef;
8013                 print <$fd>;
8014                 close $fd
8015                         or print "Reading git-diff-tree failed\n";
8016         } elsif ($format eq 'patch') {
8017                 local $/ = undef;
8018                 print <$fd>;
8019                 close $fd
8020                         or print "Reading git-format-patch failed\n";
8021         }
8022 }
8023
8024 sub git_commitdiff_plain {
8025         git_commitdiff(-format => 'plain');
8026 }
8027
8028 # format-patch-style patches
8029 sub git_patch {
8030         git_commitdiff(-format => 'patch', -single => 1);
8031 }
8032
8033 sub git_patches {
8034         git_commitdiff(-format => 'patch');
8035 }
8036
8037 sub git_history {
8038         git_log_generic('history', \&git_history_body,
8039                         $hash_base, $hash_parent_base,
8040                         $file_name, $hash);
8041 }
8042
8043 sub git_search {
8044         $searchtype ||= 'commit';
8045
8046         # check if appropriate features are enabled
8047         gitweb_check_feature('search')
8048                 or die_error(403, "Search is disabled");
8049         if ($searchtype eq 'pickaxe') {
8050                 # pickaxe may take all resources of your box and run for several minutes
8051                 # with every query - so decide by yourself how public you make this feature
8052                 gitweb_check_feature('pickaxe')
8053                         or die_error(403, "Pickaxe search is disabled");
8054         }
8055         if ($searchtype eq 'grep') {
8056                 # grep search might be potentially CPU-intensive, too
8057                 gitweb_check_feature('grep')
8058                         or die_error(403, "Grep search is disabled");
8059         }
8060
8061         if (!defined $searchtext) {
8062                 die_error(400, "Text field is empty");
8063         }
8064         if (!defined $hash) {
8065                 $hash = git_get_head_hash($project);
8066         }
8067         my %co = parse_commit($hash);
8068         if (!%co) {
8069                 die_error(404, "Unknown commit object");
8070         }
8071         if (!defined $page) {
8072                 $page = 0;
8073         }
8074
8075         if ($searchtype eq 'commit' ||
8076             $searchtype eq 'author' ||
8077             $searchtype eq 'committer') {
8078                 git_search_message(%co);
8079         } elsif ($searchtype eq 'pickaxe') {
8080                 git_search_changes(%co);
8081         } elsif ($searchtype eq 'grep') {
8082                 git_search_files(%co);
8083         } else {
8084                 die_error(400, "Unknown search type");
8085         }
8086 }
8087
8088 sub git_search_help {
8089         git_header_html();
8090         git_print_page_nav('','', $hash,$hash,$hash);
8091         print <<EOT;
8092 <p><strong>Pattern</strong> is by default a normal string that is matched precisely (but without
8093 regard to case, except in the case of pickaxe). However, when you check the <em>re</em> checkbox,
8094 the pattern entered is recognized as the POSIX extended
8095 <a href="http://en.wikipedia.org/wiki/Regular_expression">regular expression</a> (also case
8096 insensitive).</p>
8097 <dl>
8098 <dt><b>commit</b></dt>
8099 <dd>The commit messages and authorship information will be scanned for the given pattern.</dd>
8100 EOT
8101         my $have_grep = gitweb_check_feature('grep');
8102         if ($have_grep) {
8103                 print <<EOT;
8104 <dt><b>grep</b></dt>
8105 <dd>All files in the currently selected tree (HEAD unless you are explicitly browsing
8106     a different one) are searched for the given pattern. On large trees, this search can take
8107 a while and put some strain on the server, so please use it with some consideration. Note that
8108 due to git-grep peculiarity, currently if regexp mode is turned off, the matches are
8109 case-sensitive.</dd>
8110 EOT
8111         }
8112         print <<EOT;
8113 <dt><b>author</b></dt>
8114 <dd>Name and e-mail of the change author and date of birth of the patch will be scanned for the given pattern.</dd>
8115 <dt><b>committer</b></dt>
8116 <dd>Name and e-mail of the committer and date of commit will be scanned for the given pattern.</dd>
8117 EOT
8118         my $have_pickaxe = gitweb_check_feature('pickaxe');
8119         if ($have_pickaxe) {
8120                 print <<EOT;
8121 <dt><b>pickaxe</b></dt>
8122 <dd>All commits that caused the string to appear or disappear from any file (changes that
8123 added, removed or "modified" the string) will be listed. This search can take a while and
8124 takes a lot of strain on the server, so please use it wisely. Note that since you may be
8125 interested even in changes just changing the case as well, this search is case sensitive.</dd>
8126 EOT
8127         }
8128         print "</dl>\n";
8129         git_footer_html();
8130 }
8131
8132 sub git_shortlog {
8133         git_log_generic('shortlog', \&git_shortlog_body,
8134                         $hash, $hash_parent);
8135 }
8136
8137 ## ......................................................................
8138 ## feeds (RSS, Atom; OPML)
8139
8140 sub git_feed {
8141         my $format = shift || 'atom';
8142         my $have_blame = gitweb_check_feature('blame');
8143
8144         # Atom: http://www.atomenabled.org/developers/syndication/
8145         # RSS:  http://www.notestips.com/80256B3A007F2692/1/NAMO5P9UPQ
8146         if ($format ne 'rss' && $format ne 'atom') {
8147                 die_error(400, "Unknown web feed format");
8148         }
8149
8150         # log/feed of current (HEAD) branch, log of given branch, history of file/directory
8151         my $head = $hash || 'HEAD';
8152         my @commitlist = parse_commits($head, 150, 0, $file_name);
8153
8154         my %latest_commit;
8155         my %latest_date;
8156         my $content_type = "application/$format+xml";
8157         if (defined $cgi->http('HTTP_ACCEPT') &&
8158                  $cgi->Accept('text/xml') > $cgi->Accept($content_type)) {
8159                 # browser (feed reader) prefers text/xml
8160                 $content_type = 'text/xml';
8161         }
8162         if (defined($commitlist[0])) {
8163                 %latest_commit = %{$commitlist[0]};
8164                 my $latest_epoch = $latest_commit{'committer_epoch'};
8165                 exit_if_unmodified_since($latest_epoch);
8166                 %latest_date = parse_date($latest_epoch, $latest_commit{'committer_tz'});
8167         }
8168         print $cgi->header(
8169                 -type => $content_type,
8170                 -charset => 'utf-8',
8171                 %latest_date ? (-last_modified => $latest_date{'rfc2822'}) : (),
8172                 -status => '200 OK');
8173
8174         # Optimization: skip generating the body if client asks only
8175         # for Last-Modified date.
8176         return if ($cgi->request_method() eq 'HEAD');
8177
8178         # header variables
8179         my $title = "$site_name - $project/$action";
8180         my $feed_type = 'log';
8181         if (defined $hash) {
8182                 $title .= " - '$hash'";
8183                 $feed_type = 'branch log';
8184                 if (defined $file_name) {
8185                         $title .= " :: $file_name";
8186                         $feed_type = 'history';
8187                 }
8188         } elsif (defined $file_name) {
8189                 $title .= " - $file_name";
8190                 $feed_type = 'history';
8191         }
8192         $title .= " $feed_type";
8193         $title = esc_html($title);
8194         my $descr = git_get_project_description($project);
8195         if (defined $descr) {
8196                 $descr = esc_html($descr);
8197         } else {
8198                 $descr = "$project " .
8199                          ($format eq 'rss' ? 'RSS' : 'Atom') .
8200                          " feed";
8201         }
8202         my $owner = git_get_project_owner($project);
8203         $owner = esc_html($owner);
8204
8205         #header
8206         my $alt_url;
8207         if (defined $file_name) {
8208                 $alt_url = href(-full=>1, action=>"history", hash=>$hash, file_name=>$file_name);
8209         } elsif (defined $hash) {
8210                 $alt_url = href(-full=>1, action=>"log", hash=>$hash);
8211         } else {
8212                 $alt_url = href(-full=>1, action=>"summary");
8213         }
8214         print qq!<?xml version="1.0" encoding="utf-8"?>\n!;
8215         if ($format eq 'rss') {
8216                 print <<XML;
8217 <rss version="2.0" xmlns:content="http://purl.org/rss/1.0/modules/content/">
8218 <channel>
8219 XML
8220                 print "<title>$title</title>\n" .
8221                       "<link>$alt_url</link>\n" .
8222                       "<description>$descr</description>\n" .
8223                       "<language>en</language>\n" .
8224                       # project owner is responsible for 'editorial' content
8225                       "<managingEditor>$owner</managingEditor>\n";
8226                 if (defined $logo || defined $favicon) {
8227                         # prefer the logo to the favicon, since RSS
8228                         # doesn't allow both
8229                         my $img = esc_url($logo || $favicon);
8230                         print "<image>\n" .
8231                               "<url>$img</url>\n" .
8232                               "<title>$title</title>\n" .
8233                               "<link>$alt_url</link>\n" .
8234                               "</image>\n";
8235                 }
8236                 if (%latest_date) {
8237                         print "<pubDate>$latest_date{'rfc2822'}</pubDate>\n";
8238                         print "<lastBuildDate>$latest_date{'rfc2822'}</lastBuildDate>\n";
8239                 }
8240                 print "<generator>gitweb v.$version/$git_version</generator>\n";
8241         } elsif ($format eq 'atom') {
8242                 print <<XML;
8243 <feed xmlns="http://www.w3.org/2005/Atom">
8244 XML
8245                 print "<title>$title</title>\n" .
8246                       "<subtitle>$descr</subtitle>\n" .
8247                       '<link rel="alternate" type="text/html" href="' .
8248                       $alt_url . '" />' . "\n" .
8249                       '<link rel="self" type="' . $content_type . '" href="' .
8250                       $cgi->self_url() . '" />' . "\n" .
8251                       "<id>" . href(-full=>1) . "</id>\n" .
8252                       # use project owner for feed author
8253                       "<author><name>$owner</name></author>\n";
8254                 if (defined $favicon) {
8255                         print "<icon>" . esc_url($favicon) . "</icon>\n";
8256                 }
8257                 if (defined $logo) {
8258                         # not twice as wide as tall: 72 x 27 pixels
8259                         print "<logo>" . esc_url($logo) . "</logo>\n";
8260                 }
8261                 if (! %latest_date) {
8262                         # dummy date to keep the feed valid until commits trickle in:
8263                         print "<updated>1970-01-01T00:00:00Z</updated>\n";
8264                 } else {
8265                         print "<updated>$latest_date{'iso-8601'}</updated>\n";
8266                 }
8267                 print "<generator version='$version/$git_version'>gitweb</generator>\n";
8268         }
8269
8270         # contents
8271         for (my $i = 0; $i <= $#commitlist; $i++) {
8272                 my %co = %{$commitlist[$i]};
8273                 my $commit = $co{'id'};
8274                 # we read 150, we always show 30 and the ones more recent than 48 hours
8275                 if (($i >= 20) && ((time - $co{'author_epoch'}) > 48*60*60)) {
8276                         last;
8277                 }
8278                 my %cd = parse_date($co{'author_epoch'}, $co{'author_tz'});
8279
8280                 # get list of changed files
8281                 open my $fd, "-|", git_cmd(), "diff-tree", '-r', @diff_opts,
8282                         $co{'parent'} || "--root",
8283                         $co{'id'}, "--", (defined $file_name ? $file_name : ())
8284                         or next;
8285                 my @difftree = map { chomp; $_ } <$fd>;
8286                 close $fd
8287                         or next;
8288
8289                 # print element (entry, item)
8290                 my $co_url = href(-full=>1, action=>"commitdiff", hash=>$commit);
8291                 if ($format eq 'rss') {
8292                         print "<item>\n" .
8293                               "<title>" . esc_html($co{'title'}) . "</title>\n" .
8294                               "<author>" . esc_html($co{'author'}) . "</author>\n" .
8295                               "<pubDate>$cd{'rfc2822'}</pubDate>\n" .
8296                               "<guid isPermaLink=\"true\">$co_url</guid>\n" .
8297                               "<link>$co_url</link>\n" .
8298                               "<description>" . esc_html($co{'title'}) . "</description>\n" .
8299                               "<content:encoded>" .
8300                               "<![CDATA[\n";
8301                 } elsif ($format eq 'atom') {
8302                         print "<entry>\n" .
8303                               "<title type=\"html\">" . esc_html($co{'title'}) . "</title>\n" .
8304                               "<updated>$cd{'iso-8601'}</updated>\n" .
8305                               "<author>\n" .
8306                               "  <name>" . esc_html($co{'author_name'}) . "</name>\n";
8307                         if ($co{'author_email'}) {
8308                                 print "  <email>" . esc_html($co{'author_email'}) . "</email>\n";
8309                         }
8310                         print "</author>\n" .
8311                               # use committer for contributor
8312                               "<contributor>\n" .
8313                               "  <name>" . esc_html($co{'committer_name'}) . "</name>\n";
8314                         if ($co{'committer_email'}) {
8315                                 print "  <email>" . esc_html($co{'committer_email'}) . "</email>\n";
8316                         }
8317                         print "</contributor>\n" .
8318                               "<published>$cd{'iso-8601'}</published>\n" .
8319                               "<link rel=\"alternate\" type=\"text/html\" href=\"$co_url\" />\n" .
8320                               "<id>$co_url</id>\n" .
8321                               "<content type=\"xhtml\" xml:base=\"" . esc_url($my_url) . "\">\n" .
8322                               "<div xmlns=\"http://www.w3.org/1999/xhtml\">\n";
8323                 }
8324                 my $comment = $co{'comment'};
8325                 print "<pre>\n";
8326                 foreach my $line (@$comment) {
8327                         $line = esc_html($line);
8328                         print "$line\n";
8329                 }
8330                 print "</pre><ul>\n";
8331                 foreach my $difftree_line (@difftree) {
8332                         my %difftree = parse_difftree_raw_line($difftree_line);
8333                         next if !$difftree{'from_id'};
8334
8335                         my $file = $difftree{'file'} || $difftree{'to_file'};
8336
8337                         print "<li>" .
8338                               "[" .
8339                               $cgi->a({-href => href(-full=>1, action=>"blobdiff",
8340                                                      hash=>$difftree{'to_id'}, hash_parent=>$difftree{'from_id'},
8341                                                      hash_base=>$co{'id'}, hash_parent_base=>$co{'parent'},
8342                                                      file_name=>$file, file_parent=>$difftree{'from_file'}),
8343                                       -title => "diff"}, 'D');
8344                         if ($have_blame) {
8345                                 print $cgi->a({-href => href(-full=>1, action=>"blame",
8346                                                              file_name=>$file, hash_base=>$commit),
8347                                               -title => "blame"}, 'B');
8348                         }
8349                         # if this is not a feed of a file history
8350                         if (!defined $file_name || $file_name ne $file) {
8351                                 print $cgi->a({-href => href(-full=>1, action=>"history",
8352                                                              file_name=>$file, hash=>$commit),
8353                                               -title => "history"}, 'H');
8354                         }
8355                         $file = esc_path($file);
8356                         print "] ".
8357                               "$file</li>\n";
8358                 }
8359                 if ($format eq 'rss') {
8360                         print "</ul>]]>\n" .
8361                               "</content:encoded>\n" .
8362                               "</item>\n";
8363                 } elsif ($format eq 'atom') {
8364                         print "</ul>\n</div>\n" .
8365                               "</content>\n" .
8366                               "</entry>\n";
8367                 }
8368         }
8369
8370         # end of feed
8371         if ($format eq 'rss') {
8372                 print "</channel>\n</rss>\n";
8373         } elsif ($format eq 'atom') {
8374                 print "</feed>\n";
8375         }
8376 }
8377
8378 sub git_rss {
8379         git_feed('rss');
8380 }
8381
8382 sub git_atom {
8383         git_feed('atom');
8384 }
8385
8386 sub git_opml {
8387         my @list = git_get_projects_list($project_filter, $strict_export);
8388         if (!@list) {
8389                 die_error(404, "No projects found");
8390         }
8391
8392         print $cgi->header(
8393                 -type => 'text/xml',
8394                 -charset => 'utf-8',
8395                 -content_disposition => 'inline; filename="opml.xml"');
8396
8397         my $title = esc_html($site_name);
8398         my $filter = " within subdirectory ";
8399         if (defined $project_filter) {
8400                 $filter .= esc_html($project_filter);
8401         } else {
8402                 $filter = "";
8403         }
8404         print <<XML;
8405 <?xml version="1.0" encoding="utf-8"?>
8406 <opml version="1.0">
8407 <head>
8408   <title>$title OPML Export$filter</title>
8409 </head>
8410 <body>
8411 <outline text="git RSS feeds">
8412 XML
8413
8414         foreach my $pr (@list) {
8415                 my %proj = %$pr;
8416                 my $head = git_get_head_hash($proj{'path'});
8417                 if (!defined $head) {
8418                         next;
8419                 }
8420                 $git_dir = "$projectroot/$proj{'path'}";
8421                 my %co = parse_commit($head);
8422                 if (!%co) {
8423                         next;
8424                 }
8425
8426                 my $path = esc_html(chop_str($proj{'path'}, 25, 5));
8427                 my $rss  = href('project' => $proj{'path'}, 'action' => 'rss', -full => 1);
8428                 my $html = href('project' => $proj{'path'}, 'action' => 'summary', -full => 1);
8429                 print "<outline type=\"rss\" text=\"$path\" title=\"$path\" xmlUrl=\"$rss\" htmlUrl=\"$html\"/>\n";
8430         }
8431         print <<XML;
8432 </outline>
8433 </body>
8434 </opml>
8435 XML
8436 }