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 use Time::Local;
  22 binmode STDOUT, ':utf8';
  23
  24 if (!defined($CGI::VERSION) || $CGI::VERSION < 4.08) {
  25         eval 'sub CGI::multi_param { CGI::param(@_) }'
  26 }
  27
  28 our $t0 = [ gettimeofday() ];
  29 our $number_of_git_cmds = 0;
  30
  31 BEGIN {
  32         CGI->compile() if $ENV{'MOD_PERL'};
  33 }
  34
  35 our $version = "++GIT_VERSION++";
  36
  37 our ($my_url, $my_uri, $base_url, $path_info, $home_link);
  38 sub evaluate_uri {
  39         our $cgi;
  40
  41         our $my_url = $cgi->url();
  42         our $my_uri = $cgi->url(-absolute => 1);
  43
  44         # Base URL for relative URLs in gitweb ($logo, $favicon, ...),
  45         # needed and used only for URLs with nonempty PATH_INFO
  46         our $base_url = $my_url;
  47
  48         # When the script is used as DirectoryIndex, the URL does not contain the name
  49         # of the script file itself, and $cgi->url() fails to strip PATH_INFO, so we
  50         # have to do it ourselves. We make $path_info global because it's also used
  51         # later on.
  52         #
  53         # Another issue with the script being the DirectoryIndex is that the resulting
  54         # $my_url data is not the full script URL: this is good, because we want
  55         # generated links to keep implying the script name if it wasn't explicitly
  56         # indicated in the URL we're handling, but it means that $my_url cannot be used
  57         # as base URL.
  58         # Therefore, if we needed to strip PATH_INFO, then we know that we have
  59         # to build the base URL ourselves:
  60         our $path_info = decode_utf8($ENV{"PATH_INFO"});
  61         if ($path_info) {
  62                 # $path_info has already been URL-decoded by the web server, but
  63                 # $my_url and $my_uri have not. URL-decode them so we can properly
  64                 # strip $path_info.
  65                 $my_url = unescape($my_url);
  66                 $my_uri = unescape($my_uri);
  67                 if ($my_url =~ s,\Q$path_info\E$,, &&
  68                     $my_uri =~ s,\Q$path_info\E$,, &&
  69                     defined $ENV{'SCRIPT_NAME'}) {
  70                         $base_url = $cgi->url(-base => 1) . $ENV{'SCRIPT_NAME'};
  71                 }
  72         }
  73
  74         # target of the home link on top of all pages
  75         our $home_link = $my_uri || "/";
  76 }
  77
  78 # core git executable to use
  79 # this can just be "git" if your webserver has a sensible PATH
  80 our $GIT = "++GIT_BINDIR++/git";
  81
  82 # absolute fs-path which will be prepended to the project path
  83 #our $projectroot = "/pub/scm";
  84 our $projectroot = "++GITWEB_PROJECTROOT++";
  85
  86 # fs traversing limit for getting project list
  87 # the number is relative to the projectroot
  88 our $project_maxdepth = "++GITWEB_PROJECT_MAXDEPTH++";
  89
  90 # string of the home link on top of all pages
  91 our $home_link_str = "++GITWEB_HOME_LINK_STR++";
  92
  93 # extra breadcrumbs preceding the home link
  94 our @extra_breadcrumbs = ();
  95
  96 # name of your site or organization to appear in page titles
  97 # replace this with something more descriptive for clearer bookmarks
  98 our $site_name = "++GITWEB_SITENAME++"
  99                  || ($ENV{'SERVER_NAME'} || "Untitled") . " Git";
 100
 101 # html snippet to include in the <head> section of each page
 102 our $site_html_head_string = "++GITWEB_SITE_HTML_HEAD_STRING++";
 103 # filename of html text to include at top of each page
 104 our $site_header = "++GITWEB_SITE_HEADER++";
 105 # html text to include at home page
 106 our $home_text = "++GITWEB_HOMETEXT++";
 107 # filename of html text to include at bottom of each page
 108 our $site_footer = "++GITWEB_SITE_FOOTER++";
 109
 110 # URI of stylesheets
 111 our @stylesheets = ("++GITWEB_CSS++");
 112 # URI of a single stylesheet, which can be overridden in GITWEB_CONFIG.
 113 our $stylesheet = undef;
 114 # URI of GIT logo (72x27 size)
 115 our $logo = "++GITWEB_LOGO++";
 116 # URI of GIT favicon, assumed to be image/png type
 117 our $favicon = "++GITWEB_FAVICON++";
 118 # URI of gitweb.js (JavaScript code for gitweb)
 119 our $javascript = "++GITWEB_JS++";
 120
 121 # URI and label (title) of GIT logo link
 122 #our $logo_url = "http://www.kernel.org/pub/software/scm/git/docs/";
 123 #our $logo_label = "git documentation";
 124 our $logo_url = "http://git-scm.com/";
 125 our $logo_label = "git homepage";
 126
 127 # source of projects list
 128 our $projects_list = "++GITWEB_LIST++";
 129
 130 # the width (in characters) of the projects list "Description" column
 131 our $projects_list_description_width = 25;
 132
 133 # group projects by category on the projects list
 134 # (enabled if this variable evaluates to true)
 135 our $projects_list_group_categories = 0;
 136
 137 # default category if none specified
 138 # (leave the empty string for no category)
 139 our $project_list_default_category = "";
 140
 141 # default order of projects list
 142 # valid values are none, project, descr, owner, and age
 143 our $default_projects_order = "project";
 144
 145 # show repository only if this file exists
 146 # (only effective if this variable evaluates to true)
 147 our $export_ok = "++GITWEB_EXPORT_OK++";
 148
 149 # don't generate age column on the projects list page
 150 our $omit_age_column = 0;
 151
 152 # use contents of this file (in iso, iso-strict or raw format) as
 153 # the last activity data if it exists and is a valid date
 154 our $lastactivity_file = undef;
 155
 156 # don't generate information about owners of repositories
 157 our $omit_owner=0;
 158
 159 # show repository only if this subroutine returns true
 160 # when given the path to the project, for example:
 161 #    sub { return -e "$_[0]/git-daemon-export-ok"; }
 162 our $export_auth_hook = undef;
 163
 164 # only allow viewing of repositories also shown on the overview page
 165 our $strict_export = "++GITWEB_STRICT_EXPORT++";
 166
 167 # list of git base URLs used for URL to where fetch project from,
 168 # i.e. full URL is "$git_base_url/$project"
 169 our @git_base_url_list = grep { $_ ne '' } ("++GITWEB_BASE_URL++");
 170
 171 # default blob_plain mimetype and default charset for text/plain blob
 172 our $default_blob_plain_mimetype = 'text/plain';
 173 our $default_text_plain_charset  = undef;
 174
 175 # file to use for guessing MIME types before trying /etc/mime.types
 176 # (relative to the current git repository)
 177 our $mimetypes_file = undef;
 178
 179 # assume this charset if line contains non-UTF-8 characters;
 180 # it should be valid encoding (see Encoding::Supported(3pm) for list),
 181 # for which encoding all byte sequences are valid, for example
 182 # 'iso-8859-1' aka 'latin1' (it is decoded without checking, so it
 183 # could be even 'utf-8' for the old behavior)
 184 our $fallback_encoding = 'latin1';
 185
 186 # rename detection options for git-diff and git-diff-tree
 187 # - default is '-M', with the cost proportional to
 188 #   (number of removed files) * (number of new files).
 189 # - more costly is '-C' (which implies '-M'), with the cost proportional to
 190 #   (number of changed files + number of removed files) * (number of new files)
 191 # - even more costly is '-C', '--find-copies-harder' with cost
 192 #   (number of files in the original tree) * (number of new files)
 193 # - one might want to include '-B' option, e.g. '-B', '-M'
 194 our @diff_opts = ('-M'); # taken from git_commit
 195
 196 # Disables features that would allow repository owners to inject script into
 197 # the gitweb domain.
 198 our $prevent_xss = 0;
 199
 200 # Path to the highlight executable to use (must be the one from
 201 # http://www.andre-simon.de due to assumptions about parameters and output).
 202 # Useful if highlight is not installed on your webserver's PATH.
 203 # [Default: highlight]
 204 our $highlight_bin = "++HIGHLIGHT_BIN++";
 205
 206 # Whether to include project list on the gitweb front page; 0 means yes,
 207 # 1 means no list but show tag cloud if enabled (all projects still need
 208 # to be scanned), 2 means no list and no tag cloud (very fast)
 209 our $frontpage_no_project_list = 0;
 210
 211 # information about snapshot formats that gitweb is capable of serving
 212 our %known_snapshot_formats = (
 213         # name => {
 214         #       'display' => display name,
 215         #       'type' => mime type,
 216         #       'suffix' => filename suffix,
 217         #       'format' => --format for git-archive,
 218         #       'compressor' => [compressor command and arguments]
 219         #                       (array reference, optional)
 220         #       'disabled' => boolean (optional)}
 221         #
 222         'tgz' => {
 223                 'display' => 'tar.gz',
 224                 'type' => 'application/x-gzip',
 225                 'suffix' => '.tar.gz',
 226                 'format' => 'tar',
 227                 'compressor' => ['gzip', '-n']},
 228
 229         'tbz2' => {
 230                 'display' => 'tar.bz2',
 231                 'type' => 'application/x-bzip2',
 232                 'suffix' => '.tar.bz2',
 233                 'format' => 'tar',
 234                 'compressor' => ['bzip2']},
 235
 236         'txz' => {
 237                 'display' => 'tar.xz',
 238                 'type' => 'application/x-xz',
 239                 'suffix' => '.tar.xz',
 240                 'format' => 'tar',
 241                 'compressor' => ['xz'],
 242                 'disabled' => 1},
 243
 244         'zip' => {
 245                 'display' => 'zip',
 246                 'type' => 'application/x-zip',
 247                 'suffix' => '.zip',
 248                 'format' => 'zip'},
 249 );
 250
 251 # Aliases so we understand old gitweb.snapshot values in repository
 252 # configuration.
 253 our %known_snapshot_format_aliases = (
 254         'gzip'  => 'tgz',
 255         'bzip2' => 'tbz2',
 256         'xz'    => 'txz',
 257
 258         # backward compatibility: legacy gitweb config support
 259         'x-gzip' => undef, 'gz' => undef,
 260         'x-bzip2' => undef, 'bz2' => undef,
 261         'x-zip' => undef, '' => undef,
 262 );
 263
 264 # Pixel sizes for icons and avatars. If the default font sizes or lineheights
 265 # are changed, it may be appropriate to change these values too via
 266 # $GITWEB_CONFIG.
 267 our %avatar_size = (
 268         'default' => 16,
 269         'double'  => 32
 270 );
 271
 272 # Used to set the maximum load that we will still respond to gitweb queries.
 273 # If server load exceed this value then return "503 server busy" error.
 274 # If gitweb cannot determined server load, it is taken to be 0.
 275 # Leave it undefined (or set to 'undef') to turn off load checking.
 276 our $maxload = 300;
 277
 278 # configuration for 'highlight' (http://www.andre-simon.de/)
 279 # match by basename
 280 our %highlight_basename = (
 281         #'Program' => 'py',
 282         #'Library' => 'py',
 283         'SConstruct' => 'py', # SCons equivalent of Makefile
 284         'Makefile' => 'make',
 285 );
 286 # match by extension
 287 our %highlight_ext = (
 288         # main extensions, defining name of syntax;
 289         # see files in /usr/share/highlight/langDefs/ directory
 290         (map { $_ => $_ } qw(py rb java css js tex bib xml awk bat ini spec tcl sql)),
 291         # alternate extensions, see /etc/highlight/filetypes.conf
 292         (map { $_ => 'c'   } qw(c h)),
 293         (map { $_ => 'sh'  } qw(sh bash zsh ksh)),
 294         (map { $_ => 'cpp' } qw(cpp cxx c++ cc)),
 295         (map { $_ => 'php' } qw(php php3 php4 php5 phps)),
 296         (map { $_ => 'pl'  } qw(pl perl pm)), # perhaps also 'cgi'
 297         (map { $_ => 'make'} qw(make mak mk)),
 298         (map { $_ => 'xml' } qw(xml xhtml html htm)),
 299 );
 300
 301 # You define site-wide feature defaults here; override them with
 302 # $GITWEB_CONFIG as necessary.
 303 our %feature = (
 304         # feature => {
 305         #       'sub' => feature-sub (subroutine),
 306         #       'override' => allow-override (boolean),
 307         #       'default' => [ default options...] (array reference)}
 308         #
 309         # if feature is overridable (it means that allow-override has true value),
 310         # then feature-sub will be called with default options as parameters;
 311         # return value of feature-sub indicates if to enable specified feature
 312         #
 313         # if there is no 'sub' key (no feature-sub), then feature cannot be
 314         # overridden
 315         #
 316         # use gitweb_get_feature(<feature>) to retrieve the <feature> value
 317         # (an array) or gitweb_check_feature(<feature>) to check if <feature>
 318         # is enabled
 319
 320         # Enable the 'blame' blob view, showing the last commit that modified
 321         # each line in the file. This can be very CPU-intensive.
 322
 323         # To enable system wide have in $GITWEB_CONFIG
 324         # $feature{'blame'}{'default'} = [1];
 325         # To have project specific config enable override in $GITWEB_CONFIG
 326         # $feature{'blame'}{'override'} = 1;
 327         # and in project config gitweb.blame = 0|1;
 328         'blame' => {
 329                 'sub' => sub { feature_bool('blame', @_) },
 330                 'override' => 0,
 331                 'default' => [0]},
 332
 333         # Enable the 'snapshot' link, providing a compressed archive of any
 334         # tree. This can potentially generate high traffic if you have large
 335         # project.
 336
 337         # Value is a list of formats defined in %known_snapshot_formats that
 338         # you wish to offer.
 339         # To disable system wide have in $GITWEB_CONFIG
 340         # $feature{'snapshot'}{'default'} = [];
 341         # To have project specific config enable override in $GITWEB_CONFIG
 342         # $feature{'snapshot'}{'override'} = 1;
 343         # and in project config, a comma-separated list of formats or "none"
 344         # to disable.  Example: gitweb.snapshot = tbz2,zip;
 345         'snapshot' => {
 346                 'sub' => \&feature_snapshot,
 347                 'override' => 0,
 348                 'default' => ['tgz']},
 349
 350         # Enable text search, which will list the commits which match author,
 351         # committer or commit text to a given string.  Enabled by default.
 352         # Project specific override is not supported.
 353         #
 354         # Note that this controls all search features, which means that if
 355         # it is disabled, then 'grep' and 'pickaxe' search would also be
 356         # disabled.
 357         'search' => {
 358                 'override' => 0,
 359                 'default' => [1]},
 360
 361         # Enable grep search, which will list the files in currently selected
 362         # tree containing the given string. Enabled by default. This can be
 363         # potentially CPU-intensive, of course.
 364         # Note that you need to have 'search' feature enabled too.
 365
 366         # To enable system wide have in $GITWEB_CONFIG
 367         # $feature{'grep'}{'default'} = [1];
 368         # To have project specific config enable override in $GITWEB_CONFIG
 369         # $feature{'grep'}{'override'} = 1;
 370         # and in project config gitweb.grep = 0|1;
 371         'grep' => {
 372                 'sub' => sub { feature_bool('grep', @_) },
 373                 'override' => 0,
 374                 'default' => [1]},
 375
 376         # Enable the pickaxe search, which will list the commits that modified
 377         # a given string in a file. This can be practical and quite faster
 378         # alternative to 'blame', but still potentially CPU-intensive.
 379         # Note that you need to have 'search' feature enabled too.
 380
 381         # To enable system wide have in $GITWEB_CONFIG
 382         # $feature{'pickaxe'}{'default'} = [1];
 383         # To have project specific config enable override in $GITWEB_CONFIG
 384         # $feature{'pickaxe'}{'override'} = 1;
 385         # and in project config gitweb.pickaxe = 0|1;
 386         'pickaxe' => {
 387                 'sub' => sub { feature_bool('pickaxe', @_) },
 388                 'override' => 0,
 389                 'default' => [1]},
 390
 391         # Enable showing size of blobs in a 'tree' view, in a separate
 392         # column, similar to what 'ls -l' does.  This cost a bit of IO.
 393
 394         # To disable system wide have in $GITWEB_CONFIG
 395         # $feature{'show-sizes'}{'default'} = [0];
 396         # To have project specific config enable override in $GITWEB_CONFIG
 397         # $feature{'show-sizes'}{'override'} = 1;
 398         # and in project config gitweb.showsizes = 0|1;
 399         'show-sizes' => {
 400                 'sub' => sub { feature_bool('showsizes', @_) },
 401                 'override' => 0,
 402                 'default' => [1]},
 403
 404         # Make gitweb use an alternative format of the URLs which can be
 405         # more readable and natural-looking: project name is embedded
 406         # directly in the path and the query string contains other
 407         # auxiliary information. All gitweb installations recognize
 408         # URL in either format; this configures in which formats gitweb
 409         # generates links.
 410
 411         # To enable system wide have in $GITWEB_CONFIG
 412         # $feature{'pathinfo'}{'default'} = [1];
 413         # Project specific override is not supported.
 414
 415         # Note that you will need to change the default location of CSS,
 416         # favicon, logo and possibly other files to an absolute URL. Also,
 417         # if gitweb.cgi serves as your indexfile, you will need to force
 418         # $my_uri to contain the script name in your $GITWEB_CONFIG.
 419         'pathinfo' => {
 420                 'override' => 0,
 421                 'default' => [0]},
 422
 423         # Make gitweb consider projects in project root subdirectories
 424         # to be forks of existing projects. Given project $projname.git,
 425         # projects matching $projname/*.git will not be shown in the main
 426         # projects list, instead a '+' mark will be added to $projname
 427         # there and a 'forks' view will be enabled for the project, listing
 428         # all the forks. If project list is taken from a file, forks have
 429         # to be listed after the main project.
 430
 431         # To enable system wide have in $GITWEB_CONFIG
 432         # $feature{'forks'}{'default'} = [1];
 433         # Project specific override is not supported.
 434         'forks' => {
 435                 'override' => 0,
 436                 'default' => [0]},
 437
 438         # Insert custom links to the action bar of all project pages.
 439         # This enables you mainly to link to third-party scripts integrating
 440         # into gitweb; e.g. git-browser for graphical history representation
 441         # or custom web-based repository administration interface.
 442
 443         # The 'default' value consists of a list of triplets in the form
 444         # (label, link, position) where position is the label after which
 445         # to insert the link and link is a format string where %n expands
 446         # to the project name, %f to the project path within the filesystem,
 447         # %h to the current hash (h gitweb parameter) and %b to the current
 448         # hash base (hb gitweb parameter); %% expands to %.
 449
 450         # To enable system wide have in $GITWEB_CONFIG e.g.
 451         # $feature{'actions'}{'default'} = [('graphiclog',
 452         #       '/git-browser/by-commit.html?r=%n', 'summary')];
 453         # Project specific override is not supported.
 454         'actions' => {
 455                 'override' => 0,
 456                 'default' => []},
 457
 458         # Allow gitweb scan project content tags of project repository,
 459         # and display the popular Web 2.0-ish "tag cloud" near the projects
 460         # list.  Note that this is something COMPLETELY different from the
 461         # normal Git tags.
 462
 463         # gitweb by itself can show existing tags, but it does not handle
 464         # tagging itself; you need to do it externally, outside gitweb.
 465         # The format is described in git_get_project_ctags() subroutine.
 466         # You may want to install the HTML::TagCloud Perl module to get
 467         # a pretty tag cloud instead of just a list of tags.
 468
 469         # To enable system wide have in $GITWEB_CONFIG
 470         # $feature{'ctags'}{'default'} = [1];
 471         # Project specific override is not supported.
 472
 473         # A value of 0 means no ctags display or editing.  A value of
 474         # 1 enables ctags display but never editing.  A non-empty value
 475         # that is not a string of digits enables ctags display AND the
 476         # ability to add tags using a form that uses method POST and
 477         # an action value set to the configured 'ctags' value.
 478         'ctags' => {
 479                 'override' => 0,
 480                 'default' => [0]},
 481
 482         # The maximum number of patches in a patchset generated in patch
 483         # view. Set this to 0 or undef to disable patch view, or to a
 484         # negative number to remove any limit.
 485
 486         # To disable system wide have in $GITWEB_CONFIG
 487         # $feature{'patches'}{'default'} = [0];
 488         # To have project specific config enable override in $GITWEB_CONFIG
 489         # $feature{'patches'}{'override'} = 1;
 490         # and in project config gitweb.patches = 0|n;
 491         # where n is the maximum number of patches allowed in a patchset.
 492         'patches' => {
 493                 'sub' => \&feature_patches,
 494                 'override' => 0,
 495                 'default' => [16]},
 496
 497         # Avatar support. When this feature is enabled, views such as
 498         # shortlog or commit will display an avatar associated with
 499         # the email of the committer(s) and/or author(s).
 500
 501         # Currently available providers are gravatar and picon.
 502         # If an unknown provider is specified, the feature is disabled.
 503
 504         # Gravatar depends on Digest::MD5.
 505         # Picon currently relies on the indiana.edu database.
 506
 507         # To enable system wide have in $GITWEB_CONFIG
 508         # $feature{'avatar'}{'default'} = ['<provider>'];
 509         # where <provider> is either gravatar or picon.
 510         # To have project specific config enable override in $GITWEB_CONFIG
 511         # $feature{'avatar'}{'override'} = 1;
 512         # and in project config gitweb.avatar = <provider>;
 513         'avatar' => {
 514                 'sub' => \&feature_avatar,
 515                 'override' => 0,
 516                 'default' => ['']},
 517
 518         # Enable displaying how much time and how many git commands
 519         # it took to generate and display page.  Disabled by default.
 520         # Project specific override is not supported.
 521         'timed' => {
 522                 'override' => 0,
 523                 'default' => [0]},
 524
 525         # Enable turning some links into links to actions which require
 526         # JavaScript to run (like 'blame_incremental').  Not enabled by
 527         # default.  Project specific override is currently not supported.
 528         'javascript-actions' => {
 529                 'override' => 0,
 530                 'default' => [0]},
 531
 532         # Enable and configure ability to change common timezone for dates
 533         # in gitweb output via JavaScript.  Enabled by default.
 534         # Project specific override is not supported.
 535         'javascript-timezone' => {
 536                 'override' => 0,
 537                 'default' => [
 538                         'local',     # default timezone: 'utc', 'local', or '(-|+)HHMM' format,
 539                                      # or undef to turn off this feature
 540                         'gitweb_tz', # name of cookie where to store selected timezone
 541                         'datetime',  # CSS class used to mark up dates for manipulation
 542                 ]},
 543
 544         # Syntax highlighting support. This is based on Daniel Svensson's
 545         # and Sham Chukoury's work in gitweb-xmms2.git.
 546         # It requires the 'highlight' program present in $PATH,
 547         # and therefore is disabled by default.
 548
 549         # To enable system wide have in $GITWEB_CONFIG
 550         # $feature{'highlight'}{'default'} = [1];
 551
 552         'highlight' => {
 553                 'sub' => sub { feature_bool('highlight', @_) },
 554                 'override' => 0,
 555                 'default' => [0]},
 556
 557         # Enable displaying of remote heads in the heads list
 558
 559         # To enable system wide have in $GITWEB_CONFIG
 560         # $feature{'remote_heads'}{'default'} = [1];
 561         # To have project specific config enable override in $GITWEB_CONFIG
 562         # $feature{'remote_heads'}{'override'} = 1;
 563         # and in project config gitweb.remoteheads = 0|1;
 564         'remote_heads' => {
 565                 'sub' => sub { feature_bool('remote_heads', @_) },
 566                 'override' => 0,
 567                 'default' => [0]},
 568
 569         # Enable showing branches under other refs in addition to heads
 570
 571         # To set system wide extra branch refs have in $GITWEB_CONFIG
 572         # $feature{'extra-branch-refs'}{'default'} = ['dirs', 'of', 'choice'];
 573         # To have project specific config enable override in $GITWEB_CONFIG
 574         # $feature{'extra-branch-refs'}{'override'} = 1;
 575         # and in project config gitweb.extrabranchrefs = dirs of choice
 576         # Every directory is separated with whitespace.
 577
 578         'extra-branch-refs' => {
 579                 'sub' => \&feature_extra_branch_refs,
 580                 'override' => 0,
 581                 'default' => []},
 582 );
 583
 584 sub gitweb_get_feature {
 585         my ($name) = @_;
 586         return unless exists $feature{$name};
 587         my ($sub, $override, @defaults) = (
 588                 $feature{$name}{'sub'},
 589                 $feature{$name}{'override'},
 590                 @{$feature{$name}{'default'}});
 591         # project specific override is possible only if we have project
 592         our $git_dir; # global variable, declared later
 593         if (!$override || !defined $git_dir) {
 594                 return @defaults;
 595         }
 596         if (!defined $sub) {
 597                 warn "feature $name is not overridable";
 598                 return @defaults;
 599         }
 600         return $sub->(@defaults);
 601 }
 602
 603 # A wrapper to check if a given feature is enabled.
 604 # With this, you can say
 605 #
 606 #   my $bool_feat = gitweb_check_feature('bool_feat');
 607 #   gitweb_check_feature('bool_feat') or somecode;
 608 #
 609 # instead of
 610 #
 611 #   my ($bool_feat) = gitweb_get_feature('bool_feat');
 612 #   (gitweb_get_feature('bool_feat'))[0] or somecode;
 613 #
 614 sub gitweb_check_feature {
 615         return (gitweb_get_feature(@_))[0];
 616 }
 617
 618
 619 sub feature_bool {
 620         my $key = shift;
 621         my ($val) = git_get_project_config($key, '--bool');
 622
 623         if (!defined $val) {
 624                 return ($_[0]);
 625         } elsif ($val eq 'true') {
 626                 return (1);
 627         } elsif ($val eq 'false') {
 628                 return (0);
 629         }
 630 }
 631
 632 sub feature_snapshot {
 633         my (@fmts) = @_;
 634
 635         my ($val) = git_get_project_config('snapshot');
 636
 637         if ($val) {
 638                 @fmts = ($val eq 'none' ? () : split /\s*[,\s]\s*/, $val);
 639         }
 640
 641         return @fmts;
 642 }
 643
 644 sub feature_patches {
 645         my @val = (git_get_project_config('patches', '--int'));
 646
 647         if (@val) {
 648                 return @val;
 649         }
 650
 651         return ($_[0]);
 652 }
 653
 654 sub feature_avatar {
 655         my @val = (git_get_project_config('avatar'));
 656
 657         return @val ? @val : @_;
 658 }
 659
 660 sub feature_extra_branch_refs {
 661         my (@branch_refs) = @_;
 662         my $values = git_get_project_config('extrabranchrefs');
 663
 664         if ($values) {
 665                 $values = config_to_multi ($values);
 666                 @branch_refs = ();
 667                 foreach my $value (@{$values}) {
 668                         push @branch_refs, split /\s+/, $value;
 669                 }
 670         }
 671
 672         return @branch_refs;
 673 }
 674
 675 # checking HEAD file with -e is fragile if the repository was
 676 # initialized long time ago (i.e. symlink HEAD) and was pack-ref'ed
 677 # and then pruned.
 678 sub check_head_link {
 679         my ($dir) = @_;
 680         my $headfile = "$dir/HEAD";
 681         return ((-e $headfile) ||
 682                 (-l $headfile && readlink($headfile) =~ /^refs\/heads\//));
 683 }
 684
 685 sub check_export_ok {
 686         my ($dir) = @_;
 687         return (check_head_link($dir) &&
 688                 (!$export_ok || -e "$dir/$export_ok") &&
 689                 (!$export_auth_hook || $export_auth_hook->($dir)));
 690 }
 691
 692 # process alternate names for backward compatibility
 693 # filter out unsupported (unknown) snapshot formats
 694 sub filter_snapshot_fmts {
 695         my @fmts = @_;
 696
 697         @fmts = map {
 698                 exists $known_snapshot_format_aliases{$_} ?
 699                        $known_snapshot_format_aliases{$_} : $_} @fmts;
 700         @fmts = grep {
 701                 exists $known_snapshot_formats{$_} &&
 702                 !$known_snapshot_formats{$_}{'disabled'}} @fmts;
 703 }
 704
 705 sub filter_and_validate_refs {
 706         my @refs = @_;
 707         my %unique_refs = ();
 708
 709         foreach my $ref (@refs) {
 710                 die_error(500, "Invalid ref '$ref' in 'extra-branch-refs' feature") unless (is_valid_ref_format($ref));
 711                 # 'heads' are added implicitly in get_branch_refs().
 712                 $unique_refs{$ref} = 1 if ($ref ne 'heads');
 713         }
 714         return sort keys %unique_refs;
 715 }
 716
 717 # If it is set to code reference, it is code that it is to be run once per
 718 # request, allowing updating configurations that change with each request,
 719 # while running other code in config file only once.
 720 #
 721 # Otherwise, if it is false then gitweb would process config file only once;
 722 # if it is true then gitweb config would be run for each request.
 723 our $per_request_config = 1;
 724
 725 # read and parse gitweb config file given by its parameter.
 726 # returns true on success, false on recoverable error, allowing
 727 # to chain this subroutine, using first file that exists.
 728 # dies on errors during parsing config file, as it is unrecoverable.
 729 sub read_config_file {
 730         my $filename = shift;
 731         return unless defined $filename;
 732         # die if there are errors parsing config file
 733         if (-e $filename) {
 734                 do $filename;
 735                 die $@ if $@;
 736                 return 1;
 737         }
 738         return;
 739 }
 740
 741 our ($GITWEB_CONFIG, $GITWEB_CONFIG_SYSTEM, $GITWEB_CONFIG_COMMON);
 742 sub evaluate_gitweb_config {
 743         our $GITWEB_CONFIG = $ENV{'GITWEB_CONFIG'} || "++GITWEB_CONFIG++";
 744         our $GITWEB_CONFIG_SYSTEM = $ENV{'GITWEB_CONFIG_SYSTEM'} || "++GITWEB_CONFIG_SYSTEM++";
 745         our $GITWEB_CONFIG_COMMON = $ENV{'GITWEB_CONFIG_COMMON'} || "++GITWEB_CONFIG_COMMON++";
 746
 747         # Protect against duplications of file names, to not read config twice.
 748         # Only one of $GITWEB_CONFIG and $GITWEB_CONFIG_SYSTEM is used, so
 749         # there possibility of duplication of filename there doesn't matter.
 750         $GITWEB_CONFIG = ""        if ($GITWEB_CONFIG eq $GITWEB_CONFIG_COMMON);
 751         $GITWEB_CONFIG_SYSTEM = "" if ($GITWEB_CONFIG_SYSTEM eq $GITWEB_CONFIG_COMMON);
 752
 753         # Common system-wide settings for convenience.
 754         # Those settings can be ovverriden by GITWEB_CONFIG or GITWEB_CONFIG_SYSTEM.
 755         read_config_file($GITWEB_CONFIG_COMMON);
 756
 757         # Use first config file that exists.  This means use the per-instance
 758         # GITWEB_CONFIG if exists, otherwise use GITWEB_SYSTEM_CONFIG.
 759         read_config_file($GITWEB_CONFIG) and return;
 760         read_config_file($GITWEB_CONFIG_SYSTEM);
 761 }
 762
 763 # Get loadavg of system, to compare against $maxload.
 764 # Currently it requires '/proc/loadavg' present to get loadavg;
 765 # if it is not present it returns 0, which means no load checking.
 766 sub get_loadavg {
 767         if( -e '/proc/loadavg' ){
 768                 open my $fd, '<', '/proc/loadavg'
 769                         or return 0;
 770                 my @load = split(/\s+/, scalar <$fd>);
 771                 close $fd;
 772
 773                 # The first three columns measure CPU and IO utilization of the last one,
 774                 # five, and 10 minute periods.  The fourth column shows the number of
 775                 # currently running processes and the total number of processes in the m/n
 776                 # format.  The last column displays the last process ID used.
 777                 return $load[0] || 0;
 778         }
 779         # additional checks for load average should go here for things that don't export
 780         # /proc/loadavg
 781
 782         return 0;
 783 }
 784
 785 # version of the core git binary
 786 our $git_version;
 787 sub evaluate_git_version {
 788         our $git_version = qx("$GIT" --version) =~ m/git version (.*)$/ ? $1 : "unknown";
 789         $number_of_git_cmds++;
 790 }
 791
 792 sub check_loadavg {
 793         if (defined $maxload && get_loadavg() > $maxload) {
 794                 die_error(503, "The load average on the server is too high");
 795         }
 796 }
 797
 798 # ======================================================================
 799 # input validation and dispatch
 800
 801 # input parameters can be collected from a variety of sources (presently, CGI
 802 # and PATH_INFO), so we define an %input_params hash that collects them all
 803 # together during validation: this allows subsequent uses (e.g. href()) to be
 804 # agnostic of the parameter origin
 805
 806 our %input_params = ();
 807
 808 # input parameters are stored with the long parameter name as key. This will
 809 # also be used in the href subroutine to convert parameters to their CGI
 810 # equivalent, and since the href() usage is the most frequent one, we store
 811 # the name -> CGI key mapping here, instead of the reverse.
 812 #
 813 # XXX: Warning: If you touch this, check the search form for updating,
 814 # too.
 815
 816 our @cgi_param_mapping = (
 817         project => "p",
 818         action => "a",
 819         file_name => "f",
 820         file_parent => "fp",
 821         hash => "h",
 822         hash_parent => "hp",
 823         hash_base => "hb",
 824         hash_parent_base => "hpb",
 825         page => "pg",
 826         order => "o",
 827         searchtext => "s",
 828         searchtype => "st",
 829         snapshot_format => "sf",
 830         ctag_filter => 't',
 831         extra_options => "opt",
 832         search_use_regexp => "sr",
 833         ctag => "by_tag",
 834         diff_style => "ds",
 835         project_filter => "pf",
 836         # this must be last entry (for manipulation from JavaScript)
 837         javascript => "js"
 838 );
 839 our %cgi_param_mapping = @cgi_param_mapping;
 840
 841 # we will also need to know the possible actions, for validation
 842 our %actions = (
 843         "blame" => \&git_blame,
 844         "blame_incremental" => \&git_blame_incremental,
 845         "blame_data" => \&git_blame_data,
 846         "blobdiff" => \&git_blobdiff,
 847         "blobdiff_plain" => \&git_blobdiff_plain,
 848         "blob" => \&git_blob,
 849         "blob_plain" => \&git_blob_plain,
 850         "commitdiff" => \&git_commitdiff,
 851         "commitdiff_plain" => \&git_commitdiff_plain,
 852         "commit" => \&git_commit,
 853         "forks" => \&git_forks,
 854         "heads" => \&git_heads,
 855         "history" => \&git_history,
 856         "log" => \&git_log,
 857         "patch" => \&git_patch,
 858         "patches" => \&git_patches,
 859         "remotes" => \&git_remotes,
 860         "rss" => \&git_rss,
 861         "atom" => \&git_atom,
 862         "search" => \&git_search,
 863         "search_help" => \&git_search_help,
 864         "shortlog" => \&git_shortlog,
 865         "summary" => \&git_summary,
 866         "tag" => \&git_tag,
 867         "tags" => \&git_tags,
 868         "tree" => \&git_tree,
 869         "snapshot" => \&git_snapshot,
 870         "object" => \&git_object,
 871         # those below don't need $project
 872         "opml" => \&git_opml,
 873         "frontpage" => \&git_frontpage,
 874         "project_list" => \&git_project_list,
 875         "project_index" => \&git_project_index,
 876 );
 877
 878 # finally, we have the hash of allowed extra_options for the commands that
 879 # allow them
 880 our %allowed_options = (
 881         "--no-merges" => [ qw(rss atom log shortlog history) ],
 882 );
 883
 884 # fill %input_params with the CGI parameters. All values except for 'opt'
 885 # should be single values, but opt can be an array. We should probably
 886 # build an array of parameters that can be multi-valued, but since for the time
 887 # being it's only this one, we just single it out
 888 sub evaluate_query_params {
 889         our $cgi;
 890
 891         while (my ($name, $symbol) = each %cgi_param_mapping) {
 892                 if ($symbol eq 'opt') {
 893                         $input_params{$name} = [ map { decode_utf8($_) } $cgi->multi_param($symbol) ];
 894                 } else {
 895                         $input_params{$name} = decode_utf8($cgi->param($symbol));
 896                 }
 897         }
 898
 899         # Backwards compatibility - by_tag= <=> t=
 900         if ($input_params{'ctag'}) {
 901                 $input_params{'ctag_filter'} = $input_params{'ctag'};
 902         }
 903 }
 904
 905 # now read PATH_INFO and update the parameter list for missing parameters
 906 sub evaluate_path_info {
 907         return if defined $input_params{'project'};
 908         return if !$path_info;
 909         $path_info =~ s,^/+,,;
 910         return if !$path_info;
 911
 912         # find which part of PATH_INFO is project
 913         my $project = $path_info;
 914         $project =~ s,/+$,,;
 915         while ($project && !check_head_link("$projectroot/$project")) {
 916                 $project =~ s,/*[^/]*$,,;
 917         }
 918         return unless $project;
 919         $input_params{'project'} = $project;
 920
 921         # do not change any parameters if an action is given using the query string
 922         return if $input_params{'action'};
 923         $path_info =~ s,^\Q$project\E/*,,;
 924
 925         # next, check if we have an action
 926         my $action = $path_info;
 927         $action =~ s,/.*$,,;
 928         if (exists $actions{$action}) {
 929                 $path_info =~ s,^$action/*,,;
 930                 $input_params{'action'} = $action;
 931         }
 932
 933         # list of actions that want hash_base instead of hash, but can have no
 934         # pathname (f) parameter
 935         my @wants_base = (
 936                 'tree',
 937                 'history',
 938         );
 939
 940         # we want to catch, among others
 941         # [$hash_parent_base[:$file_parent]..]$hash_parent[:$file_name]
 942         my ($parentrefname, $parentpathname, $refname, $pathname) =
 943                 ($path_info =~ /^(?:(.+?)(?::(.+))?\.\.)?([^:]+?)?(?::(.+))?$/);
 944
 945         # first, analyze the 'current' part
 946         if (defined $pathname) {
 947                 # we got "branch:filename" or "branch:dir/"
 948                 # we could use git_get_type(branch:pathname), but:
 949                 # - it needs $git_dir
 950                 # - it does a git() call
 951                 # - the convention of terminating directories with a slash
 952                 #   makes it superfluous
 953                 # - embedding the action in the PATH_INFO would make it even
 954                 #   more superfluous
 955                 $pathname =~ s,^/+,,;
 956                 if (!$pathname || substr($pathname, -1) eq "/") {
 957                         $input_params{'action'} ||= "tree";
 958                         $pathname =~ s,/$,,;
 959                 } else {
 960                         # the default action depends on whether we had parent info
 961                         # or not
 962                         if ($parentrefname) {
 963                                 $input_params{'action'} ||= "blobdiff_plain";
 964                         } else {
 965                                 $input_params{'action'} ||= "blob_plain";
 966                         }
 967                 }
 968                 $input_params{'hash_base'} ||= $refname;
 969                 $input_params{'file_name'} ||= $pathname;
 970         } elsif (defined $refname) {
 971                 # we got "branch". In this case we have to choose if we have to
 972                 # set hash or hash_base.
 973                 #
 974                 # Most of the actions without a pathname only want hash to be
 975                 # set, except for the ones specified in @wants_base that want
 976                 # hash_base instead. It should also be noted that hand-crafted
 977                 # links having 'history' as an action and no pathname or hash
 978                 # set will fail, but that happens regardless of PATH_INFO.
 979                 if (defined $parentrefname) {
 980                         # if there is parent let the default be 'shortlog' action
 981                         # (for http://git.example.com/repo.git/A..B links); if there
 982                         # is no parent, dispatch will detect type of object and set
 983                         # action appropriately if required (if action is not set)
 984                         $input_params{'action'} ||= "shortlog";
 985                 }
 986                 if ($input_params{'action'} &&
 987                     grep { $_ eq $input_params{'action'} } @wants_base) {
 988                         $input_params{'hash_base'} ||= $refname;
 989                 } else {
 990                         $input_params{'hash'} ||= $refname;
 991                 }
 992         }
 993
 994         # next, handle the 'parent' part, if present
 995         if (defined $parentrefname) {
 996                 # a missing pathspec defaults to the 'current' filename, allowing e.g.
 997                 # someproject/blobdiff/oldrev..newrev:/filename
 998                 if ($parentpathname) {
 999                         $parentpathname =~ s,^/+,,;
1000                         $parentpathname =~ s,/$,,;
1001                         $input_params{'file_parent'} ||= $parentpathname;
1002                 } else {
1003                         $input_params{'file_parent'} ||= $input_params{'file_name'};
1004                 }
1005                 # we assume that hash_parent_base is wanted if a path was specified,
1006                 # or if the action wants hash_base instead of hash
1007                 if (defined $input_params{'file_parent'} ||
1008                         grep { $_ eq $input_params{'action'} } @wants_base) {
1009                         $input_params{'hash_parent_base'} ||= $parentrefname;
1010                 } else {
1011                         $input_params{'hash_parent'} ||= $parentrefname;
1012                 }
1013         }
1014
1015         # for the snapshot action, we allow URLs in the form
1016         # $project/snapshot/$hash.ext
1017         # where .ext determines the snapshot and gets removed from the
1018         # passed $refname to provide the $hash.
1019         #
1020         # To be able to tell that $refname includes the format extension, we
1021         # require the following two conditions to be satisfied:
1022         # - the hash input parameter MUST have been set from the $refname part
1023         #   of the URL (i.e. they must be equal)
1024         # - the snapshot format MUST NOT have been defined already (e.g. from
1025         #   CGI parameter sf)
1026         # It's also useless to try any matching unless $refname has a dot,
1027         # so we check for that too
1028         if (defined $input_params{'action'} &&
1029                 $input_params{'action'} eq 'snapshot' &&
1030                 defined $refname && index($refname, '.') != -1 &&
1031                 $refname eq $input_params{'hash'} &&
1032                 !defined $input_params{'snapshot_format'}) {
1033                 # We loop over the known snapshot formats, checking for
1034                 # extensions. Allowed extensions are both the defined suffix
1035                 # (which includes the initial dot already) and the snapshot
1036                 # format key itself, with a prepended dot
1037                 while (my ($fmt, $opt) = each %known_snapshot_formats) {
1038                         my $hash = $refname;
1039                         unless ($hash =~ s/(\Q$opt->{'suffix'}\E|\Q.$fmt\E)$//) {
1040                                 next;
1041                         }
1042                         my $sfx = $1;
1043                         # a valid suffix was found, so set the snapshot format
1044                         # and reset the hash parameter
1045                         $input_params{'snapshot_format'} = $fmt;
1046                         $input_params{'hash'} = $hash;
1047                         # we also set the format suffix to the one requested
1048                         # in the URL: this way a request for e.g. .tgz returns
1049                         # a .tgz instead of a .tar.gz
1050                         $known_snapshot_formats{$fmt}{'suffix'} = $sfx;
1051                         last;
1052                 }
1053         }
1054 }
1055
1056 our ($action, $project, $file_name, $file_parent, $hash, $hash_parent, $hash_base,
1057      $hash_parent_base, @extra_options, $page, $searchtype, $search_use_regexp,
1058      $searchtext, $search_regexp, $project_filter);
1059 sub evaluate_and_validate_params {
1060         our $action = $input_params{'action'};
1061         if (defined $action) {
1062                 if (!is_valid_action($action)) {
1063                         die_error(400, "Invalid action parameter");
1064                 }
1065         }
1066
1067         # parameters which are pathnames
1068         our $project = $input_params{'project'};
1069         if (defined $project) {
1070                 if (!is_valid_project($project)) {
1071                         undef $project;
1072                         die_error(404, "No such project");
1073                 }
1074         }
1075
1076         our $project_filter = $input_params{'project_filter'};
1077         if (defined $project_filter) {
1078                 if (!is_valid_pathname($project_filter)) {
1079                         die_error(404, "Invalid project_filter parameter");
1080                 }
1081         }
1082
1083         our $file_name = $input_params{'file_name'};
1084         if (defined $file_name) {
1085                 if (!is_valid_pathname($file_name)) {
1086                         die_error(400, "Invalid file parameter");
1087                 }
1088         }
1089
1090         our $file_parent = $input_params{'file_parent'};
1091         if (defined $file_parent) {
1092                 if (!is_valid_pathname($file_parent)) {
1093                         die_error(400, "Invalid file parent parameter");
1094                 }
1095         }
1096
1097         # parameters which are refnames
1098         our $hash = $input_params{'hash'};
1099         if (defined $hash) {
1100                 if (!is_valid_refname($hash)) {
1101                         die_error(400, "Invalid hash parameter");
1102                 }
1103         }
1104
1105         our $hash_parent = $input_params{'hash_parent'};
1106         if (defined $hash_parent) {
1107                 if (!is_valid_refname($hash_parent)) {
1108                         die_error(400, "Invalid hash parent parameter");
1109                 }
1110         }
1111
1112         our $hash_base = $input_params{'hash_base'};
1113         if (defined $hash_base) {
1114                 if (!is_valid_refname($hash_base)) {
1115                         die_error(400, "Invalid hash base parameter");
1116                 }
1117         }
1118
1119         our @extra_options = @{$input_params{'extra_options'}};
1120         # @extra_options is always defined, since it can only be (currently) set from
1121         # CGI, and $cgi->param() returns the empty array in array context if the param
1122         # is not set
1123         foreach my $opt (@extra_options) {
1124                 if (not exists $allowed_options{$opt}) {
1125                         die_error(400, "Invalid option parameter");
1126                 }
1127                 if (not grep(/^$action$/, @{$allowed_options{$opt}})) {
1128                         die_error(400, "Invalid option parameter for this action");
1129                 }
1130         }
1131
1132         our $hash_parent_base = $input_params{'hash_parent_base'};
1133         if (defined $hash_parent_base) {
1134                 if (!is_valid_refname($hash_parent_base)) {
1135                         die_error(400, "Invalid hash parent base parameter");
1136                 }
1137         }
1138
1139         # other parameters
1140         our $page = $input_params{'page'};
1141         if (defined $page) {
1142                 if ($page =~ m/[^0-9]/) {
1143                         die_error(400, "Invalid page parameter");
1144                 }
1145         }
1146
1147         our $searchtype = $input_params{'searchtype'};
1148         if (defined $searchtype) {
1149                 if ($searchtype =~ m/[^a-z]/) {
1150                         die_error(400, "Invalid searchtype parameter");
1151                 }
1152         }
1153
1154         our $search_use_regexp = $input_params{'search_use_regexp'};
1155
1156         our $searchtext = $input_params{'searchtext'};
1157         our $search_regexp = undef;
1158         if (defined $searchtext) {
1159                 if (length($searchtext) < 2) {
1160                         die_error(403, "At least two characters are required for search parameter");
1161                 }
1162                 if ($search_use_regexp) {
1163                         $search_regexp = $searchtext;
1164                         if (!eval { qr/$search_regexp/; 1; }) {
1165                                 (my $error = $@) =~ s/ at \S+ line \d+.*\n?//;
1166                                 die_error(400, "Invalid search regexp '$search_regexp'",
1167                                           esc_html($error));
1168                         }
1169                 } else {
1170                         $search_regexp = quotemeta $searchtext;
1171                 }
1172         }
1173 }
1174
1175 # path to the current git repository
1176 our $git_dir;
1177 sub evaluate_git_dir {
1178         our $git_dir = "$projectroot/$project" if $project;
1179 }
1180
1181 our (@snapshot_fmts, $git_avatar, @extra_branch_refs);
1182 sub configure_gitweb_features {
1183         # list of supported snapshot formats
1184         our @snapshot_fmts = gitweb_get_feature('snapshot');
1185         @snapshot_fmts = filter_snapshot_fmts(@snapshot_fmts);
1186
1187         # check that the avatar feature is set to a known provider name,
1188         # and for each provider check if the dependencies are satisfied.
1189         # if the provider name is invalid or the dependencies are not met,
1190         # reset $git_avatar to the empty string.
1191         our ($git_avatar) = gitweb_get_feature('avatar');
1192         if ($git_avatar eq 'gravatar') {
1193                 $git_avatar = '' unless (eval { require Digest::MD5; 1; });
1194         } elsif ($git_avatar eq 'picon') {
1195                 # no dependencies
1196         } else {
1197                 $git_avatar = '';
1198         }
1199
1200         our @extra_branch_refs = gitweb_get_feature('extra-branch-refs');
1201         @extra_branch_refs = filter_and_validate_refs (@extra_branch_refs);
1202 }
1203
1204 sub get_branch_refs {
1205         return ('heads', @extra_branch_refs);
1206 }
1207
1208 # custom error handler: 'die <message>' is Internal Server Error
1209 sub handle_errors_html {
1210         my $msg = shift; # it is already HTML escaped
1211
1212         # to avoid infinite loop where error occurs in die_error,
1213         # change handler to default handler, disabling handle_errors_html
1214         set_message("Error occurred when inside die_error:\n$msg");
1215
1216         # you cannot jump out of die_error when called as error handler;
1217         # the subroutine set via CGI::Carp::set_message is called _after_
1218         # HTTP headers are already written, so it cannot write them itself
1219         die_error(undef, undef, $msg, -error_handler => 1, -no_http_header => 1);
1220 }
1221 set_message(\&handle_errors_html);
1222
1223 # dispatch
1224 sub dispatch {
1225         if (!defined $action) {
1226                 if (defined $hash) {
1227                         $action = git_get_type($hash);
1228                         $action or die_error(404, "Object does not exist");
1229                 } elsif (defined $hash_base && defined $file_name) {
1230                         $action = git_get_type("$hash_base:$file_name");
1231                         $action or die_error(404, "File or directory does not exist");
1232                 } elsif (defined $project) {
1233                         $action = 'summary';
1234                 } else {
1235                         $action = 'frontpage';
1236                 }
1237         }
1238         if (!defined($actions{$action})) {
1239                 die_error(400, "Unknown action");
1240         }
1241         if ($action !~ m/^(?:opml|frontpage|project_list|project_index)$/ &&
1242             !$project) {
1243                 die_error(400, "Project needed");
1244         }
1245         $actions{$action}->();
1246 }
1247
1248 sub reset_timer {
1249         our $t0 = [ gettimeofday() ]
1250                 if defined $t0;
1251         our $number_of_git_cmds = 0;
1252 }
1253
1254 our $first_request = 1;
1255 sub run_request {
1256         reset_timer();
1257
1258         evaluate_uri();
1259         if ($first_request) {
1260                 evaluate_gitweb_config();
1261                 evaluate_git_version();
1262         }
1263         if ($per_request_config) {
1264                 if (ref($per_request_config) eq 'CODE') {
1265                         $per_request_config->();
1266                 } elsif (!$first_request) {
1267                         evaluate_gitweb_config();
1268                 }
1269         }
1270         check_loadavg();
1271
1272         # $projectroot and $projects_list might be set in gitweb config file
1273         $projects_list ||= $projectroot;
1274
1275         evaluate_query_params();
1276         evaluate_path_info();
1277         evaluate_and_validate_params();
1278         evaluate_git_dir();
1279
1280         configure_gitweb_features();
1281
1282         dispatch();
1283 }
1284
1285 our $is_last_request = sub { 1 };
1286 our ($pre_dispatch_hook, $post_dispatch_hook, $pre_listen_hook);
1287 our $CGI = 'CGI';
1288 our $cgi;
1289 sub configure_as_fcgi {
1290         require CGI::Fast;
1291         our $CGI = 'CGI::Fast';
1292
1293         my $request_number = 0;
1294         # let each child service 100 requests
1295         our $is_last_request = sub { ++$request_number > 100 };
1296 }
1297 sub evaluate_argv {
1298         my $script_name = $ENV{'SCRIPT_NAME'} || $ENV{'SCRIPT_FILENAME'} || __FILE__;
1299         configure_as_fcgi()
1300                 if $script_name =~ /\.fcgi$/;
1301
1302         return unless (@ARGV);
1303
1304         require Getopt::Long;
1305         Getopt::Long::GetOptions(
1306                 'fastcgi|fcgi|f' => \&configure_as_fcgi,
1307                 'nproc|n=i' => sub {
1308                         my ($arg, $val) = @_;
1309                         return unless eval { require FCGI::ProcManager; 1; };
1310                         my $proc_manager = FCGI::ProcManager->new({
1311                                 n_processes => $val,
1312                         });
1313                         our $pre_listen_hook    = sub { $proc_manager->pm_manage()        };
1314                         our $pre_dispatch_hook  = sub { $proc_manager->pm_pre_dispatch()  };
1315                         our $post_dispatch_hook = sub { $proc_manager->pm_post_dispatch() };
1316                 },
1317         );
1318 }
1319
1320 # Any "our" variable that could possibly influence correct handling of
1321 # a CGI request MUST be reset in this subroutine
1322 sub _reset_globals {
1323         # Note that $t0 and $number_of_git_commands are handled by reset_timer
1324         our %input_params = ();
1325         our ($action, $project, $file_name, $file_parent, $hash, $hash_parent, $hash_base,
1326              $hash_parent_base, @extra_options, $page, $searchtype, $search_use_regexp,
1327              $searchtext, $search_regexp, $project_filter) = ();
1328         our $git_dir = undef;
1329         our (@snapshot_fmts, $git_avatar, @extra_branch_refs) = ();
1330         our %avatar_cache = ();
1331         our $config_file = '';
1332         our %config = ();
1333         our $gitweb_project_owner = undef;
1334         keys %known_snapshot_formats; # reset 'each' iterator
1335 }
1336
1337 sub run {
1338         evaluate_argv();
1339
1340         $first_request = 1;
1341         $pre_listen_hook->()
1342                 if $pre_listen_hook;
1343
1344  REQUEST:
1345         while ($cgi = $CGI->new()) {
1346                 $pre_dispatch_hook->()
1347                         if $pre_dispatch_hook;
1348                 {
1349                         # most globals can simply be reset
1350                         _reset_globals;
1351
1352                         # evaluate_path_info corrupts %known_snapshot_formats
1353                         # so we need a deepish copy of it -- note that
1354                         # _reset_globals already took care of resetting its
1355                         # hash iterator that evaluate_path_info also leaves
1356                         # in an indeterminate state
1357                         my %formats = ();
1358                         while (my ($k,$v) = each(%known_snapshot_formats)) {
1359                                 $formats{$k} = {%{$known_snapshot_formats{$k}}};
1360                         }
1361                         local *known_snapshot_formats = \%formats;
1362
1363                         eval {run_request()};
1364                 }
1365                 $post_dispatch_hook->()
1366                         if $post_dispatch_hook;
1367                 $first_request = 0;
1368
1369                 last REQUEST if ($is_last_request->());
1370         }
1371
1372         1;
1373 }
1374
1375 run();
1376
1377 if (defined caller) {
1378         # wrapped in a subroutine processing requests,
1379         # e.g. mod_perl with ModPerl::Registry, or PSGI with Plack::App::WrapCGI
1380         return;
1381 } else {
1382         # pure CGI script, serving single request
1383         exit;
1384 }
1385
1386 ## ======================================================================
1387 ## action links
1388
1389 # possible values of extra options
1390 # -full => 0|1      - use absolute/full URL ($my_uri/$my_url as base)
1391 # -replay => 1      - start from a current view (replay with modifications)
1392 # -path_info => 0|1 - don't use/use path_info URL (if possible)
1393 # -anchor => ANCHOR - add #ANCHOR to end of URL, implies -replay if used alone
1394 sub href {
1395         my %params = @_;
1396         # default is to use -absolute url() i.e. $my_uri
1397         my $href = $params{-full} ? $my_url : $my_uri;
1398
1399         # implicit -replay, must be first of implicit params
1400         $params{-replay} = 1 if (keys %params == 1 && $params{-anchor});
1401
1402         $params{'project'} = $project unless exists $params{'project'};
1403
1404         if ($params{-replay}) {
1405                 while (my ($name, $symbol) = each %cgi_param_mapping) {
1406                         if (!exists $params{$name}) {
1407                                 $params{$name} = $input_params{$name};
1408                         }
1409                 }
1410         }
1411
1412         my $use_pathinfo = gitweb_check_feature('pathinfo');
1413         if (defined $params{'project'} &&
1414             (exists $params{-path_info} ? $params{-path_info} : $use_pathinfo)) {
1415                 # try to put as many parameters as possible in PATH_INFO:
1416                 #   - project name
1417                 #   - action
1418                 #   - hash_parent or hash_parent_base:/file_parent
1419                 #   - hash or hash_base:/filename
1420                 #   - the snapshot_format as an appropriate suffix
1421
1422                 # When the script is the root DirectoryIndex for the domain,
1423                 # $href here would be something like http://gitweb.example.com/
1424                 # Thus, we strip any trailing / from $href, to spare us double
1425                 # slashes in the final URL
1426                 $href =~ s,/$,,;
1427
1428                 # Then add the project name, if present
1429                 $href .= "/".esc_path_info($params{'project'});
1430                 delete $params{'project'};
1431
1432                 # since we destructively absorb parameters, we keep this
1433                 # boolean that remembers if we're handling a snapshot
1434                 my $is_snapshot = $params{'action'} eq 'snapshot';
1435
1436                 # Summary just uses the project path URL, any other action is
1437                 # added to the URL
1438                 if (defined $params{'action'}) {
1439                         $href .= "/".esc_path_info($params{'action'})
1440                                 unless $params{'action'} eq 'summary';
1441                         delete $params{'action'};
1442                 }
1443
1444                 # Next, we put hash_parent_base:/file_parent..hash_base:/file_name,
1445                 # stripping nonexistent or useless pieces
1446                 $href .= "/" if ($params{'hash_base'} || $params{'hash_parent_base'}
1447                         || $params{'hash_parent'} || $params{'hash'});
1448                 if (defined $params{'hash_base'}) {
1449                         if (defined $params{'hash_parent_base'}) {
1450                                 $href .= esc_path_info($params{'hash_parent_base'});
1451                                 # skip the file_parent if it's the same as the file_name
1452                                 if (defined $params{'file_parent'}) {
1453                                         if (defined $params{'file_name'} && $params{'file_parent'} eq $params{'file_name'}) {
1454                                                 delete $params{'file_parent'};
1455                                         } elsif ($params{'file_parent'} !~ /\.\./) {
1456                                                 $href .= ":/".esc_path_info($params{'file_parent'});
1457                                                 delete $params{'file_parent'};
1458                                         }
1459                                 }
1460                                 $href .= "..";
1461                                 delete $params{'hash_parent'};
1462                                 delete $params{'hash_parent_base'};
1463                         } elsif (defined $params{'hash_parent'}) {
1464                                 $href .= esc_path_info($params{'hash_parent'}). "..";
1465                                 delete $params{'hash_parent'};
1466                         }
1467
1468                         $href .= esc_path_info($params{'hash_base'});
1469                         if (defined $params{'file_name'} && $params{'file_name'} !~ /\.\./) {
1470                                 $href .= ":/".esc_path_info($params{'file_name'});
1471                                 delete $params{'file_name'};
1472                         }
1473                         delete $params{'hash'};
1474                         delete $params{'hash_base'};
1475                 } elsif (defined $params{'hash'}) {
1476                         $href .= esc_path_info($params{'hash'});
1477                         delete $params{'hash'};
1478                 }
1479
1480                 # If the action was a snapshot, we can absorb the
1481                 # snapshot_format parameter too
1482                 if ($is_snapshot) {
1483                         my $fmt = $params{'snapshot_format'};
1484                         # snapshot_format should always be defined when href()
1485                         # is called, but just in case some code forgets, we
1486                         # fall back to the default
1487                         $fmt ||= $snapshot_fmts[0];
1488                         $href .= $known_snapshot_formats{$fmt}{'suffix'};
1489                         delete $params{'snapshot_format'};
1490                 }
1491         }
1492
1493         # now encode the parameters explicitly
1494         my @result = ();
1495         for (my $i = 0; $i < @cgi_param_mapping; $i += 2) {
1496                 my ($name, $symbol) = ($cgi_param_mapping[$i], $cgi_param_mapping[$i+1]);
1497                 if (defined $params{$name}) {
1498                         if (ref($params{$name}) eq "ARRAY") {
1499                                 foreach my $par (@{$params{$name}}) {
1500                                         push @result, $symbol . "=" . esc_param($par);
1501                                 }
1502                         } else {
1503                                 push @result, $symbol . "=" . esc_param($params{$name});
1504                         }
1505                 }
1506         }
1507         $href .= "?" . join(';', @result) if scalar @result;
1508
1509         # final transformation: trailing spaces must be escaped (URI-encoded)
1510         $href =~ s/(\s+)$/CGI::escape($1)/e;
1511
1512         if ($params{-anchor}) {
1513                 $href .= "#".esc_param($params{-anchor});
1514         }
1515
1516         return $href;
1517 }
1518
1519
1520 ## ======================================================================
1521 ## validation, quoting/unquoting and escaping
1522
1523 sub is_valid_action {
1524         my $input = shift;
1525         return undef unless exists $actions{$input};
1526         return 1;
1527 }
1528
1529 sub is_valid_project {
1530         my $input = shift;
1531
1532         return unless defined $input;
1533         if (!is_valid_pathname($input) ||
1534                 !(-d "$projectroot/$input") ||
1535                 !check_export_ok("$projectroot/$input") ||
1536                 ($strict_export && !project_in_list($input))) {
1537                 return undef;
1538         } else {
1539                 return 1;
1540         }
1541 }
1542
1543 sub is_valid_pathname {
1544         my $input = shift;
1545
1546         return undef unless defined $input;
1547         # no '.' or '..' as elements of path, i.e. no '.' or '..'
1548         # at the beginning, at the end, and between slashes.
1549         # also this catches doubled slashes
1550         if ($input =~ m!(^|/)(|\.|\.\.)(/|$)!) {
1551                 return undef;
1552         }
1553         # no null characters
1554         if ($input =~ m!\0!) {
1555                 return undef;
1556         }
1557         return 1;
1558 }
1559
1560 sub is_valid_ref_format {
1561         my $input = shift;
1562
1563         return undef unless defined $input;
1564         # restrictions on ref name according to git-check-ref-format
1565         if ($input =~ m!(/\.|\.\.|[\000-\040\177 ~^:?*\[]|/$)!) {
1566                 return undef;
1567         }
1568         return 1;
1569 }
1570
1571 sub is_valid_refname {
1572         my $input = shift;
1573
1574         return undef unless defined $input;
1575         # textual hashes are O.K.
1576         if ($input =~ m/^[0-9a-fA-F]{40}$/) {
1577                 return 1;
1578         }
1579         # it must be correct pathname
1580         is_valid_pathname($input) or return undef;
1581         # check git-check-ref-format restrictions
1582         is_valid_ref_format($input) or return undef;
1583         return 1;
1584 }
1585
1586 # decode sequences of octets in utf8 into Perl's internal form,
1587 # which is utf-8 with utf8 flag set if needed.  gitweb writes out
1588 # in utf-8 thanks to "binmode STDOUT, ':utf8'" at beginning
1589 sub to_utf8 {
1590         my $str = shift;
1591         return undef unless defined $str;
1592
1593         if (utf8::is_utf8($str) || utf8::decode($str)) {
1594                 return $str;
1595         } else {
1596                 return decode($fallback_encoding, $str, Encode::FB_DEFAULT);
1597         }
1598 }
1599
1600 # quote unsafe chars, but keep the slash, even when it's not
1601 # correct, but quoted slashes look too horrible in bookmarks
1602 sub esc_param {
1603         my $str = shift;
1604         return undef unless defined $str;
1605         $str =~ s/([^A-Za-z0-9\-_.~()\/:@ ]+)/CGI::escape($1)/eg;
1606         $str =~ s/ /\+/g;
1607         return $str;
1608 }
1609
1610 # the quoting rules for path_info fragment are slightly different
1611 sub esc_path_info {
1612         my $str = shift;
1613         return undef unless defined $str;
1614
1615         # path_info doesn't treat '+' as space (specially), but '?' must be escaped
1616         $str =~ s/([^A-Za-z0-9\-_.~();\/;:@&= +]+)/CGI::escape($1)/eg;
1617
1618         return $str;
1619 }
1620
1621 # quote unsafe chars in whole URL, so some characters cannot be quoted
1622 sub esc_url {
1623         my $str = shift;
1624         return undef unless defined $str;
1625         $str =~ s/([^A-Za-z0-9\-_.~();\/;?:@&= ]+)/CGI::escape($1)/eg;
1626         $str =~ s/ /\+/g;
1627         return $str;
1628 }
1629
1630 # quote unsafe characters in HTML attributes
1631 sub esc_attr {
1632
1633         # for XHTML conformance escaping '"' to '&quot;' is not enough
1634         return esc_html(@_);
1635 }
1636
1637 # replace invalid utf8 character with SUBSTITUTION sequence
1638 sub esc_html {
1639         my $str = shift;
1640         my %opts = @_;
1641
1642         return undef unless defined $str;
1643
1644         $str = to_utf8($str);
1645         $str = $cgi->escapeHTML($str);
1646         if ($opts{'-nbsp'}) {
1647                 $str =~ s/ /&nbsp;/g;
1648         }
1649         $str =~ s|([[:cntrl:]])|(($1 ne "\t") ? quot_cec($1) : $1)|eg;
1650         return $str;
1651 }
1652
1653 # quote control characters and escape filename to HTML
1654 sub esc_path {
1655         my $str = shift;
1656         my %opts = @_;
1657
1658         return undef unless defined $str;
1659
1660         $str = to_utf8($str);
1661         $str = $cgi->escapeHTML($str);
1662         if ($opts{'-nbsp'}) {
1663                 $str =~ s/ /&nbsp;/g;
1664         }
1665         $str =~ s|([[:cntrl:]])|quot_cec($1)|eg;
1666         return $str;
1667 }
1668
1669 # Sanitize for use in XHTML + application/xml+xhtm (valid XML 1.0)
1670 sub sanitize {
1671         my $str = shift;
1672
1673         return undef unless defined $str;
1674
1675         $str = to_utf8($str);
1676         $str =~ s|([[:cntrl:]])|(index("\t\n\r", $1) != -1 ? $1 : quot_cec($1))|eg;
1677         return $str;
1678 }
1679
1680 # Make control characters "printable", using character escape codes (CEC)
1681 sub quot_cec {
1682         my $cntrl = shift;
1683         my %opts = @_;
1684         my %es = ( # character escape codes, aka escape sequences
1685                 "\t" => '\t',   # tab            (HT)
1686                 "\n" => '\n',   # line feed      (LF)
1687                 "\r" => '\r',   # carrige return (CR)
1688                 "\f" => '\f',   # form feed      (FF)
1689                 "\b" => '\b',   # backspace      (BS)
1690                 "\a" => '\a',   # alarm (bell)   (BEL)
1691                 "\e" => '\e',   # escape         (ESC)
1692                 "\013" => '\v', # vertical tab   (VT)
1693                 "\000" => '\0', # nul character  (NUL)
1694         );
1695         my $chr = ( (exists $es{$cntrl})
1696                     ? $es{$cntrl}
1697                     : sprintf('\%2x', ord($cntrl)) );
1698         if ($opts{-nohtml}) {
1699                 return $chr;
1700         } else {
1701                 return "<span class=\"cntrl\">$chr</span>";
1702         }
1703 }
1704
1705 # Alternatively use unicode control pictures codepoints,
1706 # Unicode "printable representation" (PR)
1707 sub quot_upr {
1708         my $cntrl = shift;
1709         my %opts = @_;
1710
1711         my $chr = sprintf('&#%04d;', 0x2400+ord($cntrl));
1712         if ($opts{-nohtml}) {
1713                 return $chr;
1714         } else {
1715                 return "<span class=\"cntrl\">$chr</span>";
1716         }
1717 }
1718
1719 # git may return quoted and escaped filenames
1720 sub unquote {
1721         my $str = shift;
1722
1723         sub unq {
1724                 my $seq = shift;
1725                 my %es = ( # character escape codes, aka escape sequences
1726                         't' => "\t",   # tab            (HT, TAB)
1727                         'n' => "\n",   # newline        (NL)
1728                         'r' => "\r",   # return         (CR)
1729                         'f' => "\f",   # form feed      (FF)
1730                         'b' => "\b",   # backspace      (BS)
1731                         'a' => "\a",   # alarm (bell)   (BEL)
1732                         'e' => "\e",   # escape         (ESC)
1733                         'v' => "\013", # vertical tab   (VT)
1734                 );
1735
1736                 if ($seq =~ m/^[0-7]{1,3}$/) {
1737                         # octal char sequence
1738                         return chr(oct($seq));
1739                 } elsif (exists $es{$seq}) {
1740                         # C escape sequence, aka character escape code
1741                         return $es{$seq};
1742                 }
1743                 # quoted ordinary character
1744                 return $seq;
1745         }
1746
1747         if ($str =~ m/^"(.*)"$/) {
1748                 # needs unquoting
1749                 $str = $1;
1750                 $str =~ s/\\([^0-7]|[0-7]{1,3})/unq($1)/eg;
1751         }
1752         return $str;
1753 }
1754
1755 # escape tabs (convert tabs to spaces)
1756 sub untabify {
1757         my $line = shift;
1758
1759         while ((my $pos = index($line, "\t")) != -1) {
1760                 if (my $count = (8 - ($pos % 8))) {
1761                         my $spaces = ' ' x $count;
1762                         $line =~ s/\t/$spaces/;
1763                 }
1764         }
1765
1766         return $line;
1767 }
1768
1769 sub project_in_list {
1770         my $project = shift;
1771         my @list = git_get_projects_list();
1772         return @list && scalar(grep { $_->{'path'} eq $project } @list);
1773 }
1774
1775 ## ----------------------------------------------------------------------
1776 ## HTML aware string manipulation
1777
1778 # Try to chop given string on a word boundary between position
1779 # $len and $len+$add_len. If there is no word boundary there,
1780 # chop at $len+$add_len. Do not chop if chopped part plus ellipsis
1781 # (marking chopped part) would be longer than given string.
1782 sub chop_str {
1783         my $str = shift;
1784         my $len = shift;
1785         my $add_len = shift || 10;
1786         my $where = shift || 'right'; # 'left' | 'center' | 'right'
1787
1788         # Make sure perl knows it is utf8 encoded so we don't
1789         # cut in the middle of a utf8 multibyte char.
1790         $str = to_utf8($str);
1791
1792         # allow only $len chars, but don't cut a word if it would fit in $add_len
1793         # if it doesn't fit, cut it if it's still longer than the dots we would add
1794         # remove chopped character entities entirely
1795
1796         # when chopping in the middle, distribute $len into left and right part
1797         # return early if chopping wouldn't make string shorter
1798         if ($where eq 'center') {
1799                 return $str if ($len + 5 >= length($str)); # filler is length 5
1800                 $len = int($len/2);
1801         } else {
1802                 return $str if ($len + 4 >= length($str)); # filler is length 4
1803         }
1804
1805         # regexps: ending and beginning with word part up to $add_len
1806         my $endre = qr/.{$len}\w{0,$add_len}/;
1807         my $begre = qr/\w{0,$add_len}.{$len}/;
1808
1809         if ($where eq 'left') {
1810                 $str =~ m/^(.*?)($begre)$/;
1811                 my ($lead, $body) = ($1, $2);
1812                 if (length($lead) > 4) {
1813                         $lead = " ...";
1814                 }
1815                 return "$lead$body";
1816
1817         } elsif ($where eq 'center') {
1818                 $str =~ m/^($endre)(.*)$/;
1819                 my ($left, $str)  = ($1, $2);
1820                 $str =~ m/^(.*?)($begre)$/;
1821                 my ($mid, $right) = ($1, $2);
1822                 if (length($mid) > 5) {
1823                         $mid = " ... ";
1824                 }
1825                 return "$left$mid$right";
1826
1827         } else {
1828                 $str =~ m/^($endre)(.*)$/;
1829                 my $body = $1;
1830                 my $tail = $2;
1831                 if (length($tail) > 4) {
1832                         $tail = "... ";
1833                 }
1834                 return "$body$tail";
1835         }
1836 }
1837
1838 # takes the same arguments as chop_str, but also wraps a <span> around the
1839 # result with a title attribute if it does get chopped. Additionally, the
1840 # string is HTML-escaped.
1841 sub chop_and_escape_str {
1842         my ($str) = @_;
1843
1844         my $chopped = chop_str(@_);
1845         $str = to_utf8($str);
1846         if ($chopped eq $str) {
1847                 return esc_html($chopped);
1848         } else {
1849                 $str =~ s/[[:cntrl:]]/?/g;
1850                 return $cgi->span({-title=>$str}, esc_html($chopped));
1851         }
1852 }
1853
1854 # Highlight selected fragments of string, using given CSS class,
1855 # and escape HTML.  It is assumed that fragments do not overlap.
1856 # Regions are passed as list of pairs (array references).
1857 #
1858 # Example: esc_html_hl_regions("foobar", "mark", [ 0, 3 ]) returns
1859 # '<span class="mark">foo</span>bar'
1860 sub esc_html_hl_regions {
1861         my ($str, $css_class, @sel) = @_;
1862         my %opts = grep { ref($_) ne 'ARRAY' } @sel;
1863         @sel     = grep { ref($_) eq 'ARRAY' } @sel;
1864         return esc_html($str, %opts) unless @sel;
1865
1866         my $out = '';
1867         my $pos = 0;
1868
1869         for my $s (@sel) {
1870                 my ($begin, $end) = @$s;
1871
1872                 # Don't create empty <span> elements.
1873                 next if $end <= $begin;
1874
1875                 my $escaped = esc_html(substr($str, $begin, $end - $begin),
1876                                        %opts);
1877
1878                 $out .= esc_html(substr($str, $pos, $begin - $pos), %opts)
1879                         if ($begin - $pos > 0);
1880                 $out .= $cgi->span({-class => $css_class}, $escaped);
1881
1882                 $pos = $end;
1883         }
1884         $out .= esc_html(substr($str, $pos), %opts)
1885                 if ($pos < length($str));
1886
1887         return $out;
1888 }
1889
1890 # return positions of beginning and end of each match
1891 sub matchpos_list {
1892         my ($str, $regexp) = @_;
1893         return unless (defined $str && defined $regexp);
1894
1895         my @matches;
1896         while ($str =~ /$regexp/g) {
1897                 push @matches, [$-[0], $+[0]];
1898         }
1899         return @matches;
1900 }
1901
1902 # highlight match (if any), and escape HTML
1903 sub esc_html_match_hl {
1904         my ($str, $regexp) = @_;
1905         return esc_html($str) unless defined $regexp;
1906
1907         my @matches = matchpos_list($str, $regexp);
1908         return esc_html($str) unless @matches;
1909
1910         return esc_html_hl_regions($str, 'match', @matches);
1911 }
1912
1913
1914 # highlight match (if any) of shortened string, and escape HTML
1915 sub esc_html_match_hl_chopped {
1916         my ($str, $chopped, $regexp) = @_;
1917         return esc_html_match_hl($str, $regexp) unless defined $chopped;
1918
1919         my @matches = matchpos_list($str, $regexp);
1920         return esc_html($chopped) unless @matches;
1921
1922         # filter matches so that we mark chopped string
1923         my $tail = "... "; # see chop_str
1924         unless ($chopped =~ s/\Q$tail\E$//) {
1925                 $tail = '';
1926         }
1927         my $chop_len = length($chopped);
1928         my $tail_len = length($tail);
1929         my @filtered;
1930
1931         for my $m (@matches) {
1932                 if ($m->[0] > $chop_len) {
1933                         push @filtered, [ $chop_len, $chop_len + $tail_len ] if ($tail_len > 0);
1934                         last;
1935                 } elsif ($m->[1] > $chop_len) {
1936                         push @filtered, [ $m->[0], $chop_len + $tail_len ];
1937                         last;
1938                 }
1939                 push @filtered, $m;
1940         }
1941
1942         return esc_html_hl_regions($chopped . $tail, 'match', @filtered);
1943 }
1944
1945 ## ----------------------------------------------------------------------
1946 ## functions returning short strings
1947
1948 # CSS class for given age value (in seconds)
1949 sub age_class {
1950         my $age = shift;
1951
1952         if (!defined $age) {
1953                 return "noage";
1954         } elsif ($age < 60*60*2) {
1955                 return "age0";
1956         } elsif ($age < 60*60*24*2) {
1957                 return "age1";
1958         } else {
1959                 return "age2";
1960         }
1961 }
1962
1963 # convert age in seconds to "nn units ago" string
1964 sub age_string {
1965         my $age = shift;
1966         my $age_str;
1967
1968         if ($age > 60*60*24*365*2) {
1969                 $age_str = (int $age/60/60/24/365);
1970                 $age_str .= " years ago";
1971         } elsif ($age > 60*60*24*(365/12)*2) {
1972                 $age_str = int $age/60/60/24/(365/12);
1973                 $age_str .= " months ago";
1974         } elsif ($age > 60*60*24*7*2) {
1975                 $age_str = int $age/60/60/24/7;
1976                 $age_str .= " weeks ago";
1977         } elsif ($age > 60*60*24*2) {
1978                 $age_str = int $age/60/60/24;
1979                 $age_str .= " days ago";
1980         } elsif ($age > 60*60*2) {
1981                 $age_str = int $age/60/60;
1982                 $age_str .= " hours ago";
1983         } elsif ($age > 60*2) {
1984                 $age_str = int $age/60;
1985                 $age_str .= " min ago";
1986         } elsif ($age > 2) {
1987                 $age_str = int $age;
1988                 $age_str .= " sec ago";
1989         } else {
1990                 $age_str .= " right now";
1991         }
1992         return $age_str;
1993 }
1994
1995 use constant {
1996         S_IFINVALID => 0030000,
1997         S_IFGITLINK => 0160000,
1998 };
1999
2000 # submodule/subproject, a commit object reference
2001 sub S_ISGITLINK {
2002         my $mode = shift;
2003
2004         return (($mode & S_IFMT) == S_IFGITLINK)
2005 }
2006
2007 # convert file mode in octal to symbolic file mode string
2008 sub mode_str {
2009         my $mode = oct shift;
2010
2011         if (S_ISGITLINK($mode)) {
2012                 return 'm---------';
2013         } elsif (S_ISDIR($mode & S_IFMT)) {
2014                 return 'drwxr-xr-x';
2015         } elsif (S_ISLNK($mode)) {
2016                 return 'lrwxrwxrwx';
2017         } elsif (S_ISREG($mode)) {
2018                 # git cares only about the executable bit
2019                 if ($mode & S_IXUSR) {
2020                         return '-rwxr-xr-x';
2021                 } else {
2022                         return '-rw-r--r--';
2023                 };
2024         } else {
2025                 return '----------';
2026         }
2027 }
2028
2029 # convert file mode in octal to file type string
2030 sub file_type {
2031         my $mode = shift;
2032
2033         if ($mode !~ m/^[0-7]+$/) {
2034                 return $mode;
2035         } else {
2036                 $mode = oct $mode;
2037         }
2038
2039         if (S_ISGITLINK($mode)) {
2040                 return "submodule";
2041         } elsif (S_ISDIR($mode & S_IFMT)) {
2042                 return "directory";
2043         } elsif (S_ISLNK($mode)) {
2044                 return "symlink";
2045         } elsif (S_ISREG($mode)) {
2046                 return "file";
2047         } else {
2048                 return "unknown";
2049         }
2050 }
2051
2052 # convert file mode in octal to file type description string
2053 sub file_type_long {
2054         my $mode = shift;
2055
2056         if ($mode !~ m/^[0-7]+$/) {
2057                 return $mode;
2058         } else {
2059                 $mode = oct $mode;
2060         }
2061
2062         if (S_ISGITLINK($mode)) {
2063                 return "submodule";
2064         } elsif (S_ISDIR($mode & S_IFMT)) {
2065                 return "directory";
2066         } elsif (S_ISLNK($mode)) {
2067                 return "symlink";
2068         } elsif (S_ISREG($mode)) {
2069                 if ($mode & S_IXUSR) {
2070                         return "executable";
2071                 } else {
2072                         return "file";
2073                 };
2074         } else {
2075                 return "unknown";
2076         }
2077 }
2078
2079
2080 ## ----------------------------------------------------------------------
2081 ## functions returning short HTML fragments, or transforming HTML fragments
2082 ## which don't belong to other sections
2083
2084 # format line of commit message.
2085 sub format_log_line_html {
2086         my $line = shift;
2087
2088         $line = esc_html($line, -nbsp=>1);
2089         $line =~ s{\b([0-9a-fA-F]{8,40})\b}{
2090                 $cgi->a({-href => href(action=>"object", hash=>$1),
2091                                         -class => "text"}, $1);
2092         }eg;
2093
2094         return $line;
2095 }
2096
2097 # format marker of refs pointing to given object
2098
2099 # the destination action is chosen based on object type and current context:
2100 # - for annotated tags, we choose the tag view unless it's the current view
2101 #   already, in which case we go to shortlog view
2102 # - for other refs, we keep the current view if we're in history, shortlog or
2103 #   log view, and select shortlog otherwise
2104 sub format_ref_marker {
2105         my ($refs, $id) = @_;
2106         my $markers = '';
2107
2108         if (defined $refs->{$id}) {
2109                 foreach my $ref (@{$refs->{$id}}) {
2110                         # this code exploits the fact that non-lightweight tags are the
2111                         # only indirect objects, and that they are the only objects for which
2112                         # we want to use tag instead of shortlog as action
2113                         my ($type, $name) = qw();
2114                         my $indirect = ($ref =~ s/\^\{\}$//);
2115                         # e.g. tags/v2.6.11 or heads/next
2116                         if ($ref =~ m!^(.*?)s?/(.*)$!) {
2117                                 $type = $1;
2118                                 $name = $2;
2119                         } else {
2120                                 $type = "ref";
2121                                 $name = $ref;
2122                         }
2123
2124                         my $class = $type;
2125                         $class .= " indirect" if $indirect;
2126
2127                         my $dest_action = "shortlog";
2128
2129                         if ($indirect) {
2130                                 $dest_action = "tag" unless $action eq "tag";
2131                         } elsif ($action =~ /^(history|(short)?log)$/) {
2132                                 $dest_action = $action;
2133                         }
2134
2135                         my $dest = "";
2136                         $dest .= "refs/" unless $ref =~ m!^refs/!;
2137                         $dest .= $ref;
2138
2139                         my $link = $cgi->a({
2140                                 -href => href(
2141                                         action=>$dest_action,
2142                                         hash=>$dest
2143                                 )}, $name);
2144
2145                         $markers .= " <span class=\"".esc_attr($class)."\" title=\"".esc_attr($ref)."\">" .
2146                                 $link . "</span>";
2147                 }
2148         }
2149
2150         if ($markers) {
2151                 return ' <span class="refs">'. $markers . '</span>';
2152         } else {
2153                 return "";
2154         }
2155 }
2156
2157 # format, perhaps shortened and with markers, title line
2158 sub format_subject_html {
2159         my ($long, $short, $href, $extra) = @_;
2160         $extra = '' unless defined($extra);
2161
2162         if (length($short) < length($long)) {
2163                 $long =~ s/[[:cntrl:]]/?/g;
2164                 return $cgi->a({-href => $href, -class => "list subject",
2165                                 -title => to_utf8($long)},
2166                        esc_html($short)) . $extra;
2167         } else {
2168                 return $cgi->a({-href => $href, -class => "list subject"},
2169                        esc_html($long)) . $extra;
2170         }
2171 }
2172
2173 # Rather than recomputing the url for an email multiple times, we cache it
2174 # after the first hit. This gives a visible benefit in views where the avatar
2175 # for the same email is used repeatedly (e.g. shortlog).
2176 # The cache is shared by all avatar engines (currently gravatar only), which
2177 # are free to use it as preferred. Since only one avatar engine is used for any
2178 # given page, there's no risk for cache conflicts.
2179 our %avatar_cache = ();
2180
2181 # Compute the picon url for a given email, by using the picon search service over at
2182 # http://www.cs.indiana.edu/picons/search.html
2183 sub picon_url {
2184         my $email = lc shift;
2185         if (!$avatar_cache{$email}) {
2186                 my ($user, $domain) = split('@', $email);
2187                 $avatar_cache{$email} =
2188                         "//www.cs.indiana.edu/cgi-pub/kinzler/piconsearch.cgi/" .
2189                         "$domain/$user/" .
2190                         "users+domains+unknown/up/single";
2191         }
2192         return $avatar_cache{$email};
2193 }
2194
2195 # Compute the gravatar url for a given email, if it's not in the cache already.
2196 # Gravatar stores only the part of the URL before the size, since that's the
2197 # one computationally more expensive. This also allows reuse of the cache for
2198 # different sizes (for this particular engine).
2199 sub gravatar_url {
2200         my $email = lc shift;
2201         my $size = shift;
2202         $avatar_cache{$email} ||=
2203                 "//www.gravatar.com/avatar/" .
2204                         Digest::MD5::md5_hex($email) . "?s=";
2205         return $avatar_cache{$email} . $size;
2206 }
2207
2208 # Insert an avatar for the given $email at the given $size if the feature
2209 # is enabled.
2210 sub git_get_avatar {
2211         my ($email, %opts) = @_;
2212         my $pre_white  = ($opts{-pad_before} ? "&nbsp;" : "");
2213         my $post_white = ($opts{-pad_after}  ? "&nbsp;" : "");
2214         $opts{-size} ||= 'default';
2215         my $size = $avatar_size{$opts{-size}} || $avatar_size{'default'};
2216         my $url = "";
2217         if ($git_avatar eq 'gravatar') {
2218                 $url = gravatar_url($email, $size);
2219         } elsif ($git_avatar eq 'picon') {
2220                 $url = picon_url($email);
2221         }
2222         # Other providers can be added by extending the if chain, defining $url
2223         # as needed. If no variant puts something in $url, we assume avatars
2224         # are completely disabled/unavailable.
2225         if ($url) {
2226                 return $pre_white .
2227                        "<img width=\"$size\" " .
2228                             "class=\"avatar\" " .
2229                             "src=\"".esc_url($url)."\" " .
2230                             "alt=\"\" " .
2231                        "/>" . $post_white;
2232         } else {
2233                 return "";
2234         }
2235 }
2236
2237 sub format_search_author {
2238         my ($author, $searchtype, $displaytext) = @_;
2239         my $have_search = gitweb_check_feature('search');
2240
2241         if ($have_search) {
2242                 my $performed = "";
2243                 if ($searchtype eq 'author') {
2244                         $performed = "authored";
2245                 } elsif ($searchtype eq 'committer') {
2246                         $performed = "committed";
2247                 }
2248
2249                 return $cgi->a({-href => href(action=>"search", hash=>$hash,
2250                                 searchtext=>$author,
2251                                 searchtype=>$searchtype), class=>"list",
2252                                 title=>"Search for commits $performed by $author"},
2253                                 $displaytext);
2254
2255         } else {
2256                 return $displaytext;
2257         }
2258 }
2259
2260 # format the author name of the given commit with the given tag
2261 # the author name is chopped and escaped according to the other
2262 # optional parameters (see chop_str).
2263 sub format_author_html {
2264         my $tag = shift;
2265         my $co = shift;
2266         my $author = chop_and_escape_str($co->{'author_name'}, @_);
2267         return "<$tag class=\"author\">" .
2268                format_search_author($co->{'author_name'}, "author",
2269                        git_get_avatar($co->{'author_email'}, -pad_after => 1) .
2270                        $author) .
2271                "</$tag>";
2272 }
2273
2274 # format git diff header line, i.e. "diff --(git|combined|cc) ..."
2275 sub format_git_diff_header_line {
2276         my $line = shift;
2277         my $diffinfo = shift;
2278         my ($from, $to) = @_;
2279
2280         if ($diffinfo->{'nparents'}) {
2281                 # combined diff
2282                 $line =~ s!^(diff (.*?) )"?.*$!$1!;
2283                 if ($to->{'href'}) {
2284                         $line .= $cgi->a({-href => $to->{'href'}, -class => "path"},
2285                                          esc_path($to->{'file'}));
2286                 } else { # file was deleted (no href)
2287                         $line .= esc_path($to->{'file'});
2288                 }
2289         } else {
2290                 # "ordinary" diff
2291                 $line =~ s!^(diff (.*?) )"?a/.*$!$1!;
2292                 if ($from->{'href'}) {
2293                         $line .= $cgi->a({-href => $from->{'href'}, -class => "path"},
2294                                          'a/' . esc_path($from->{'file'}));
2295                 } else { # file was added (no href)
2296                         $line .= 'a/' . esc_path($from->{'file'});
2297                 }
2298                 $line .= ' ';
2299                 if ($to->{'href'}) {
2300                         $line .= $cgi->a({-href => $to->{'href'}, -class => "path"},
2301                                          'b/' . esc_path($to->{'file'}));
2302                 } else { # file was deleted
2303                         $line .= 'b/' . esc_path($to->{'file'});
2304                 }
2305         }
2306
2307         return "<div class=\"diff header\">$line</div>\n";
2308 }
2309
2310 # format extended diff header line, before patch itself
2311 sub format_extended_diff_header_line {
2312         my $line = shift;
2313         my $diffinfo = shift;
2314         my ($from, $to) = @_;
2315
2316         # match <path>
2317         if ($line =~ s!^((copy|rename) from ).*$!$1! && $from->{'href'}) {
2318                 $line .= $cgi->a({-href=>$from->{'href'}, -class=>"path"},
2319                                        esc_path($from->{'file'}));
2320         }
2321         if ($line =~ s!^((copy|rename) to ).*$!$1! && $to->{'href'}) {
2322                 $line .= $cgi->a({-href=>$to->{'href'}, -class=>"path"},
2323                                  esc_path($to->{'file'}));
2324         }
2325         # match single <mode>
2326         if ($line =~ m/\s(\d{6})$/) {
2327                 $line .= '<span class="info"> (' .
2328                          file_type_long($1) .
2329                          ')</span>';
2330         }
2331         # match <hash>
2332         if ($line =~ m/^index [0-9a-fA-F]{40},[0-9a-fA-F]{40}/) {
2333                 # can match only for combined diff
2334                 $line = 'index ';
2335                 for (my $i = 0; $i < $diffinfo->{'nparents'}; $i++) {
2336                         if ($from->{'href'}[$i]) {
2337                                 $line .= $cgi->a({-href=>$from->{'href'}[$i],
2338                                                   -class=>"hash"},
2339                                                  substr($diffinfo->{'from_id'}[$i],0,7));
2340                         } else {
2341                                 $line .= '0' x 7;
2342                         }
2343                         # separator
2344                         $line .= ',' if ($i < $diffinfo->{'nparents'} - 1);
2345                 }
2346                 $line .= '..';
2347                 if ($to->{'href'}) {
2348                         $line .= $cgi->a({-href=>$to->{'href'}, -class=>"hash"},
2349                                          substr($diffinfo->{'to_id'},0,7));
2350                 } else {
2351                         $line .= '0' x 7;
2352                 }
2353
2354         } elsif ($line =~ m/^index [0-9a-fA-F]{40}..[0-9a-fA-F]{40}/) {
2355                 # can match only for ordinary diff
2356                 my ($from_link, $to_link);
2357                 if ($from->{'href'}) {
2358                         $from_link = $cgi->a({-href=>$from->{'href'}, -class=>"hash"},
2359                                              substr($diffinfo->{'from_id'},0,7));
2360                 } else {
2361                         $from_link = '0' x 7;
2362                 }
2363                 if ($to->{'href'}) {
2364                         $to_link = $cgi->a({-href=>$to->{'href'}, -class=>"hash"},
2365                                            substr($diffinfo->{'to_id'},0,7));
2366                 } else {
2367                         $to_link = '0' x 7;
2368                 }
2369                 my ($from_id, $to_id) = ($diffinfo->{'from_id'}, $diffinfo->{'to_id'});
2370                 $line =~ s!$from_id\.\.$to_id!$from_link..$to_link!;
2371         }
2372
2373         return $line . "<br/>\n";
2374 }
2375
2376 # format from-file/to-file diff header
2377 sub format_diff_from_to_header {
2378         my ($from_line, $to_line, $diffinfo, $from, $to, @parents) = @_;
2379         my $line;
2380         my $result = '';
2381
2382         $line = $from_line;
2383         #assert($line =~ m/^---/) if DEBUG;
2384         # no extra formatting for "^--- /dev/null"
2385         if (! $diffinfo->{'nparents'}) {
2386                 # ordinary (single parent) diff
2387                 if ($line =~ m!^--- "?a/!) {
2388                         if ($from->{'href'}) {
2389                                 $line = '--- a/' .
2390                                         $cgi->a({-href=>$from->{'href'}, -class=>"path"},
2391                                                 esc_path($from->{'file'}));
2392                         } else {
2393                                 $line = '--- a/' .
2394                                         esc_path($from->{'file'});
2395                         }
2396                 }
2397                 $result .= qq!<div class="diff from_file">$line</div>\n!;
2398
2399         } else {
2400                 # combined diff (merge commit)
2401                 for (my $i = 0; $i < $diffinfo->{'nparents'}; $i++) {
2402                         if ($from->{'href'}[$i]) {
2403                                 $line = '--- ' .
2404                                         $cgi->a({-href=>href(action=>"blobdiff",
2405                                                              hash_parent=>$diffinfo->{'from_id'}[$i],
2406                                                              hash_parent_base=>$parents[$i],
2407                                                              file_parent=>$from->{'file'}[$i],
2408                                                              hash=>$diffinfo->{'to_id'},
2409                                                              hash_base=>$hash,
2410                                                              file_name=>$to->{'file'}),
2411                                                  -class=>"path",
2412                                                  -title=>"diff" . ($i+1)},
2413                                                 $i+1) .
2414                                         '/' .
2415                                         $cgi->a({-href=>$from->{'href'}[$i], -class=>"path"},
2416                                                 esc_path($from->{'file'}[$i]));
2417                         } else {
2418                                 $line = '--- /dev/null';
2419                         }
2420                         $result .= qq!<div class="diff from_file">$line</div>\n!;
2421                 }
2422         }
2423
2424         $line = $to_line;
2425         #assert($line =~ m/^\+\+\+/) if DEBUG;
2426         # no extra formatting for "^+++ /dev/null"
2427         if ($line =~ m!^\+\+\+ "?b/!) {
2428                 if ($to->{'href'}) {
2429                         $line = '+++ b/' .
2430                                 $cgi->a({-href=>$to->{'href'}, -class=>"path"},
2431                                         esc_path($to->{'file'}));
2432                 } else {
2433                         $line = '+++ b/' .
2434                                 esc_path($to->{'file'});
2435                 }
2436         }
2437         $result .= qq!<div class="diff to_file">$line</div>\n!;
2438
2439         return $result;
2440 }
2441
2442 # create note for patch simplified by combined diff
2443 sub format_diff_cc_simplified {
2444         my ($diffinfo, @parents) = @_;
2445         my $result = '';
2446
2447         $result .= "<div class=\"diff header\">" .
2448                    "diff --cc ";
2449         if (!is_deleted($diffinfo)) {
2450                 $result .= $cgi->a({-href => href(action=>"blob",
2451                                                   hash_base=>$hash,
2452                                                   hash=>$diffinfo->{'to_id'},
2453                                                   file_name=>$diffinfo->{'to_file'}),
2454                                     -class => "path"},
2455                                    esc_path($diffinfo->{'to_file'}));
2456         } else {
2457                 $result .= esc_path($diffinfo->{'to_file'});
2458         }
2459         $result .= "</div>\n" . # class="diff header"
2460                    "<div class=\"diff nodifferences\">" .
2461                    "Simple merge" .
2462                    "</div>\n"; # class="diff nodifferences"
2463
2464         return $result;
2465 }
2466
2467 sub diff_line_class {
2468         my ($line, $from, $to) = @_;
2469
2470         # ordinary diff
2471         my $num_sign = 1;
2472         # combined diff
2473         if ($from && $to && ref($from->{'href'}) eq "ARRAY") {
2474                 $num_sign = scalar @{$from->{'href'}};
2475         }
2476
2477         my @diff_line_classifier = (
2478                 { regexp => qr/^\@\@{$num_sign} /, class => "chunk_header"},
2479                 { regexp => qr/^\\/,               class => "incomplete"  },
2480                 { regexp => qr/^ {$num_sign}/,     class => "ctx" },
2481                 # classifier for context must come before classifier add/rem,
2482                 # or we would have to use more complicated regexp, for example
2483                 # qr/(?= {0,$m}\+)[+ ]{$num_sign}/, where $m = $num_sign - 1;
2484                 { regexp => qr/^[+ ]{$num_sign}/,   class => "add" },
2485                 { regexp => qr/^[- ]{$num_sign}/,   class => "rem" },
2486         );
2487         for my $clsfy (@diff_line_classifier) {
2488                 return $clsfy->{'class'}
2489                         if ($line =~ $clsfy->{'regexp'});
2490         }
2491
2492         # fallback
2493         return "";
2494 }
2495
2496 # assumes that $from and $to are defined and correctly filled,
2497 # and that $line holds a line of chunk header for unified diff
2498 sub format_unidiff_chunk_header {
2499         my ($line, $from, $to) = @_;
2500
2501         my ($from_text, $from_start, $from_lines, $to_text, $to_start, $to_lines, $section) =
2502                 $line =~ m/^\@{2} (-(\d+)(?:,(\d+))?) (\+(\d+)(?:,(\d+))?) \@{2}(.*)$/;
2503
2504         $from_lines = 0 unless defined $from_lines;
2505         $to_lines   = 0 unless defined $to_lines;
2506
2507         if ($from->{'href'}) {
2508                 $from_text = $cgi->a({-href=>"$from->{'href'}#l$from_start",
2509                                      -class=>"list"}, $from_text);
2510         }
2511         if ($to->{'href'}) {
2512                 $to_text   = $cgi->a({-href=>"$to->{'href'}#l$to_start",
2513                                      -class=>"list"}, $to_text);
2514         }
2515         $line = "<span class=\"chunk_info\">@@ $from_text $to_text @@</span>" .
2516                 "<span class=\"section\">" . esc_html($section, -nbsp=>1) . "</span>";
2517         return $line;
2518 }
2519
2520 # assumes that $from and $to are defined and correctly filled,
2521 # and that $line holds a line of chunk header for combined diff
2522 sub format_cc_diff_chunk_header {
2523         my ($line, $from, $to) = @_;
2524
2525         my ($prefix, $ranges, $section) = $line =~ m/^(\@+) (.*?) \@+(.*)$/;
2526         my (@from_text, @from_start, @from_nlines, $to_text, $to_start, $to_nlines);
2527
2528         @from_text = split(' ', $ranges);
2529         for (my $i = 0; $i < @from_text; ++$i) {
2530                 ($from_start[$i], $from_nlines[$i]) =
2531                         (split(',', substr($from_text[$i], 1)), 0);
2532         }
2533
2534         $to_text   = pop @from_text;
2535         $to_start  = pop @from_start;
2536         $to_nlines = pop @from_nlines;
2537
2538         $line = "<span class=\"chunk_info\">$prefix ";
2539         for (my $i = 0; $i < @from_text; ++$i) {
2540                 if ($from->{'href'}[$i]) {
2541                         $line .= $cgi->a({-href=>"$from->{'href'}[$i]#l$from_start[$i]",
2542                                           -class=>"list"}, $from_text[$i]);
2543                 } else {
2544                         $line .= $from_text[$i];
2545                 }
2546                 $line .= " ";
2547         }
2548         if ($to->{'href'}) {
2549                 $line .= $cgi->a({-href=>"$to->{'href'}#l$to_start",
2550                                   -class=>"list"}, $to_text);
2551         } else {
2552                 $line .= $to_text;
2553         }
2554         $line .= " $prefix</span>" .
2555                  "<span class=\"section\">" . esc_html($section, -nbsp=>1) . "</span>";
2556         return $line;
2557 }
2558
2559 # process patch (diff) line (not to be used for diff headers),
2560 # returning HTML-formatted (but not wrapped) line.
2561 # If the line is passed as a reference, it is treated as HTML and not
2562 # esc_html()'ed.
2563 sub format_diff_line {
2564         my ($line, $diff_class, $from, $to) = @_;
2565
2566         if (ref($line)) {
2567                 $line = $$line;
2568         } else {
2569                 chomp $line;
2570                 $line = untabify($line);
2571
2572                 if ($from && $to && $line =~ m/^\@{2} /) {
2573                         $line = format_unidiff_chunk_header($line, $from, $to);
2574                 } elsif ($from && $to && $line =~ m/^\@{3}/) {
2575                         $line = format_cc_diff_chunk_header($line, $from, $to);
2576                 } else {
2577                         $line = esc_html($line, -nbsp=>1);
2578                 }
2579         }
2580
2581         my $diff_classes = "diff";
2582         $diff_classes .= " $diff_class" if ($diff_class);
2583         $line = "<div class=\"$diff_classes\">$line</div>\n";
2584
2585         return $line;
2586 }
2587
2588 # Generates undef or something like "_snapshot_" or "snapshot (_tbz2_ _zip_)",
2589 # linked.  Pass the hash of the tree/commit to snapshot.
2590 sub format_snapshot_links {
2591         my ($hash) = @_;
2592         my $num_fmts = @snapshot_fmts;
2593         if ($num_fmts > 1) {
2594                 # A parenthesized list of links bearing format names.
2595                 # e.g. "snapshot (_tar.gz_ _zip_)"
2596                 return "snapshot (" . join(' ', map
2597                         $cgi->a({
2598                                 -href => href(
2599                                         action=>"snapshot",
2600                                         hash=>$hash,
2601                                         snapshot_format=>$_
2602                                 )
2603                         }, $known_snapshot_formats{$_}{'display'})
2604                 , @snapshot_fmts) . ")";
2605         } elsif ($num_fmts == 1) {
2606                 # A single "snapshot" link whose tooltip bears the format name.
2607                 # i.e. "_snapshot_"
2608                 my ($fmt) = @snapshot_fmts;
2609                 return
2610                         $cgi->a({
2611                                 -href => href(
2612                                         action=>"snapshot",
2613                                         hash=>$hash,
2614                                         snapshot_format=>$fmt
2615                                 ),
2616                                 -title => "in format: $known_snapshot_formats{$fmt}{'display'}"
2617                         }, "snapshot");
2618         } else { # $num_fmts == 0
2619                 return undef;
2620         }
2621 }
2622
2623 ## ......................................................................
2624 ## functions returning values to be passed, perhaps after some
2625 ## transformation, to other functions; e.g. returning arguments to href()
2626
2627 # returns hash to be passed to href to generate gitweb URL
2628 # in -title key it returns description of link
2629 sub get_feed_info {
2630         my $format = shift || 'Atom';
2631         my %res = (action => lc($format));
2632         my $matched_ref = 0;
2633
2634         # feed links are possible only for project views
2635         return unless (defined $project);
2636         # some views should link to OPML, or to generic project feed,
2637         # or don't have specific feed yet (so they should use generic)
2638         return if (!$action || $action =~ /^(?:tags|heads|forks|tag|search)$/x);
2639
2640         my $branch = undef;
2641         # branches refs uses 'refs/' + $get_branch_refs()[x] + '/' prefix
2642         # (fullname) to differentiate from tag links; this also makes
2643         # possible to detect branch links
2644         for my $ref (get_branch_refs()) {
2645                 if ((defined $hash_base && $hash_base =~ m!^refs/\Q$ref\E/(.*)$!) ||
2646                     (defined $hash      && $hash      =~ m!^refs/\Q$ref\E/(.*)$!)) {
2647                         $branch = $1;
2648                         $matched_ref = $ref;
2649                         last;
2650                 }
2651         }
2652         # find log type for feed description (title)
2653         my $type = 'log';
2654         if (defined $file_name) {
2655                 $type  = "history of $file_name";
2656                 $type .= "/" if ($action eq 'tree');
2657                 $type .= " on '$branch'" if (defined $branch);
2658         } else {
2659                 $type = "log of $branch" if (defined $branch);
2660         }
2661
2662         $res{-title} = $type;
2663         $res{'hash'} = (defined $branch ? "refs/$matched_ref/$branch" : undef);
2664         $res{'file_name'} = $file_name;
2665
2666         return %res;
2667 }
2668
2669 ## ----------------------------------------------------------------------
2670 ## git utility subroutines, invoking git commands
2671
2672 # returns path to the core git executable and the --git-dir parameter as list
2673 sub git_cmd {
2674         $number_of_git_cmds++;
2675         return $GIT, '--git-dir='.$git_dir;
2676 }
2677
2678 # quote the given arguments for passing them to the shell
2679 # quote_command("command", "arg 1", "arg with ' and ! characters")
2680 # => "'command' 'arg 1' 'arg with '\'' and '\!' characters'"
2681 # Try to avoid using this function wherever possible.
2682 sub quote_command {
2683         return join(' ',
2684                 map { my $a = $_; $a =~ s/(['!])/'\\$1'/g; "'$a'" } @_ );
2685 }
2686
2687 # get HEAD ref of given project as hash
2688 sub git_get_head_hash {
2689         return git_get_full_hash(shift, 'HEAD');
2690 }
2691
2692 sub git_get_full_hash {
2693         return git_get_hash(@_);
2694 }
2695
2696 sub git_get_short_hash {
2697         return git_get_hash(@_, '--short=7');
2698 }
2699
2700 sub git_get_hash {
2701         my ($project, $hash, @options) = @_;
2702         my $o_git_dir = $git_dir;
2703         my $retval = undef;
2704         $git_dir = "$projectroot/$project";
2705         if (open my $fd, '-|', git_cmd(), 'rev-parse',
2706             '--verify', '-q', @options, $hash) {
2707                 $retval = <$fd>;
2708                 chomp $retval if defined $retval;
2709                 close $fd;
2710         }
2711         if (defined $o_git_dir) {
2712                 $git_dir = $o_git_dir;
2713         }
2714         return $retval;
2715 }
2716
2717 # get type of given object
2718 sub git_get_type {
2719         my $hash = shift;
2720
2721         open my $fd, "-|", git_cmd(), "cat-file", '-t', $hash or return;
2722         my $type = <$fd>;
2723         close $fd or return;
2724         chomp $type;
2725         return $type;
2726 }
2727
2728 # repository configuration
2729 our $config_file = '';
2730 our %config;
2731
2732 # store multiple values for single key as anonymous array reference
2733 # single values stored directly in the hash, not as [ <value> ]
2734 sub hash_set_multi {
2735         my ($hash, $key, $value) = @_;
2736
2737         if (!exists $hash->{$key}) {
2738                 $hash->{$key} = $value;
2739         } elsif (!ref $hash->{$key}) {
2740                 $hash->{$key} = [ $hash->{$key}, $value ];
2741         } else {
2742                 push @{$hash->{$key}}, $value;
2743         }
2744 }
2745
2746 # return hash of git project configuration
2747 # optionally limited to some section, e.g. 'gitweb'
2748 sub git_parse_project_config {
2749         my $section_regexp = shift;
2750         my %config;
2751
2752         local $/ = "\0";
2753
2754         open my $fh, "-|", git_cmd(), "config", '-z', '-l',
2755                 or return;
2756
2757         while (my $keyval = <$fh>) {
2758                 chomp $keyval;
2759                 my ($key, $value) = split(/\n/, $keyval, 2);
2760
2761                 hash_set_multi(\%config, $key, $value)
2762                         if (!defined $section_regexp || $key =~ /^(?:$section_regexp)\./o);
2763         }
2764         close $fh;
2765
2766         return %config;
2767 }
2768
2769 # convert config value to boolean: 'true' or 'false'
2770 # no value, number > 0, 'true' and 'yes' values are true
2771 # rest of values are treated as false (never as error)
2772 sub config_to_bool {
2773         my $val = shift;
2774
2775         return 1 if !defined $val;             # section.key
2776
2777         # strip leading and trailing whitespace
2778         $val =~ s/^\s+//;
2779         $val =~ s/\s+$//;
2780
2781         return (($val =~ /^\d+$/ && $val) ||   # section.key = 1
2782                 ($val =~ /^(?:true|yes)$/i));  # section.key = true
2783 }
2784
2785 # convert config value to simple decimal number
2786 # an optional value suffix of 'k', 'm', or 'g' will cause the value
2787 # to be multiplied by 1024, 1048576, or 1073741824
2788 sub config_to_int {
2789         my $val = shift;
2790
2791         # strip leading and trailing whitespace
2792         $val =~ s/^\s+//;
2793         $val =~ s/\s+$//;
2794
2795         if (my ($num, $unit) = ($val =~ /^([0-9]*)([kmg])$/i)) {
2796                 $unit = lc($unit);
2797                 # unknown unit is treated as 1
2798                 return $num * ($unit eq 'g' ? 1073741824 :
2799                                $unit eq 'm' ?    1048576 :
2800                                $unit eq 'k' ?       1024 : 1);
2801         }
2802         return $val;
2803 }
2804
2805 # convert config value to array reference, if needed
2806 sub config_to_multi {
2807         my $val = shift;
2808
2809         return ref($val) ? $val : (defined($val) ? [ $val ] : []);
2810 }
2811
2812 sub git_get_project_config {
2813         my ($key, $type) = @_;
2814
2815         return unless defined $git_dir;
2816
2817         # key sanity check
2818         return unless ($key);
2819         # only subsection, if exists, is case sensitive,
2820         # and not lowercased by 'git config -z -l'
2821         if (my ($hi, $mi, $lo) = ($key =~ /^([^.]*)\.(.*)\.([^.]*)$/)) {
2822                 $lo =~ s/_//g;
2823                 $key = join(".", lc($hi), $mi, lc($lo));
2824                 return if ($lo =~ /\W/ || $hi =~ /\W/);
2825         } else {
2826                 $key = lc($key);
2827                 $key =~ s/_//g;
2828                 return if ($key =~ /\W/);
2829         }
2830         $key =~ s/^gitweb\.//;
2831
2832         # type sanity check
2833         if (defined $type) {
2834                 $type =~ s/^--//;
2835                 $type = undef
2836                         unless ($type eq 'bool' || $type eq 'int');
2837         }
2838
2839         # get config
2840         if (!defined $config_file ||
2841             $config_file ne "$git_dir/config") {
2842                 %config = git_parse_project_config('gitweb');
2843                 $config_file = "$git_dir/config";
2844         }
2845
2846         # check if config variable (key) exists
2847         return unless exists $config{"gitweb.$key"};
2848
2849         # ensure given type
2850         if (!defined $type) {
2851                 return $config{"gitweb.$key"};
2852         } elsif ($type eq 'bool') {
2853                 # backward compatibility: 'git config --bool' returns true/false
2854                 return config_to_bool($config{"gitweb.$key"}) ? 'true' : 'false';
2855         } elsif ($type eq 'int') {
2856                 return config_to_int($config{"gitweb.$key"});
2857         }
2858         return $config{"gitweb.$key"};
2859 }
2860
2861 # get hash of given path at given ref
2862 sub git_get_hash_by_path {
2863         my $base = shift;
2864         my $path = shift || return undef;
2865         my $type = shift;
2866
2867         $path =~ s,/+$,,;
2868
2869         open my $fd, "-|", git_cmd(), "ls-tree", $base, "--", $path
2870                 or die_error(500, "Open git-ls-tree failed");
2871         my $line = <$fd>;
2872         close $fd or return undef;
2873
2874         if (!defined $line) {
2875                 # there is no tree or hash given by $path at $base
2876                 return undef;
2877         }
2878
2879         #'100644 blob 0fa3f3a66fb6a137f6ec2c19351ed4d807070ffa  panic.c'
2880         $line =~ m/^([0-9]+) (.+) ([0-9a-fA-F]{40})\t/;
2881         if (defined $type && $type ne $2) {
2882                 # type doesn't match
2883                 return undef;
2884         }
2885         return $3;
2886 }
2887
2888 # get path of entry with given hash at given tree-ish (ref)
2889 # used to get 'from' filename for combined diff (merge commit) for renames
2890 sub git_get_path_by_hash {
2891         my $base = shift || return;
2892         my $hash = shift || return;
2893
2894         local $/ = "\0";
2895
2896         open my $fd, "-|", git_cmd(), "ls-tree", '-r', '-t', '-z', $base
2897                 or return undef;
2898         while (my $line = <$fd>) {
2899                 chomp $line;
2900
2901                 #'040000 tree 595596a6a9117ddba9fe379b6b012b558bac8423  gitweb'
2902                 #'100644 blob e02e90f0429be0d2a69b76571101f20b8f75530f  gitweb/README'
2903                 if ($line =~ m/(?:[0-9]+) (?:.+) $hash\t(.+)$/) {
2904                         close $fd;
2905                         return $1;
2906                 }
2907         }
2908         close $fd;
2909         return undef;
2910 }
2911
2912 ## ......................................................................
2913 ## git utility functions, directly accessing git repository
2914
2915 # get the value of config variable either from file named as the variable
2916 # itself in the repository ($GIT_DIR/$name file), or from gitweb.$name
2917 # configuration variable in the repository config file.
2918 sub git_get_file_or_project_config {
2919         my ($path, $name) = @_;
2920
2921         $git_dir = "$projectroot/$path";
2922         open my $fd, '<', "$git_dir/$name"
2923                 or return git_get_project_config($name);
2924         my $conf = <$fd>;
2925         close $fd;
2926         if (defined $conf) {
2927                 chomp $conf;
2928         }
2929         return $conf;
2930 }
2931
2932 sub git_get_project_description {
2933         my $path = shift;
2934         return git_get_file_or_project_config($path, 'description');
2935 }
2936
2937 sub git_get_project_category {
2938         my $path = shift;
2939         return git_get_file_or_project_config($path, 'category');
2940 }
2941
2942
2943 # supported formats:
2944 # * $GIT_DIR/ctags/<tagname> file (in 'ctags' subdirectory)
2945 #   - if its contents is a number, use it as tag weight,
2946 #   - otherwise add a tag with weight 1
2947 # * $GIT_DIR/ctags file, each line is a tag (with weight 1)
2948 #   the same value multiple times increases tag weight
2949 # * `gitweb.ctag' multi-valued repo config variable
2950 sub git_get_project_ctags {
2951         my $project = shift;
2952         my $ctags = {};
2953
2954         $git_dir = "$projectroot/$project";
2955         if (opendir my $dh, "$git_dir/ctags") {
2956                 my @files = grep { -f $_ } map { "$git_dir/ctags/$_" } readdir($dh);
2957                 foreach my $tagfile (@files) {
2958                         open my $ct, '<', $tagfile
2959                                 or next;
2960                         my $val = <$ct>;
2961                         chomp $val if $val;
2962                         close $ct;
2963
2964                         (my $ctag = $tagfile) =~ s#.*/##;
2965                         if ($val =~ /^\d+$/) {
2966                                 $ctags->{$ctag} = $val;
2967                         } else {
2968                                 $ctags->{$ctag} = 1;
2969                         }
2970                 }
2971                 closedir $dh;
2972
2973         } elsif (open my $fh, '<', "$git_dir/ctags") {
2974                 while (my $line = <$fh>) {
2975                         chomp $line;
2976                         $ctags->{$line}++ if $line;
2977                 }
2978                 close $fh;
2979
2980         } else {
2981                 my $taglist = config_to_multi(git_get_project_config('ctag'));
2982                 foreach my $tag (@$taglist) {
2983                         $ctags->{$tag}++;
2984                 }
2985         }
2986
2987         return $ctags;
2988 }
2989
2990 # return hash, where keys are content tags ('ctags'),
2991 # and values are sum of weights of given tag in every project
2992 sub git_gather_all_ctags {
2993         my $projects = shift;
2994         my $ctags = {};
2995
2996         foreach my $p (@$projects) {
2997                 foreach my $ct (keys %{$p->{'ctags'}}) {
2998                         $ctags->{$ct} += $p->{'ctags'}->{$ct};
2999                 }
3000         }
3001
3002         return $ctags;
3003 }
3004
3005 sub git_populate_project_tagcloud {
3006         my ($ctags, $action) = @_;
3007
3008         # First, merge different-cased tags; tags vote on casing
3009         my %ctags_lc;
3010         foreach (keys %$ctags) {
3011                 $ctags_lc{lc $_}->{count} += $ctags->{$_};
3012                 if (not $ctags_lc{lc $_}->{topcount}
3013                     or $ctags_lc{lc $_}->{topcount} < $ctags->{$_}) {
3014                         $ctags_lc{lc $_}->{topcount} = $ctags->{$_};
3015                         $ctags_lc{lc $_}->{topname} = $_;
3016                 }
3017         }
3018
3019         my $cloud;
3020         my $matched = $input_params{'ctag_filter'};
3021         if (eval { require HTML::TagCloud; 1; }) {
3022                 $cloud = HTML::TagCloud->new;
3023                 foreach my $ctag (sort keys %ctags_lc) {
3024                         # Pad the title with spaces so that the cloud looks
3025                         # less crammed.
3026                         my $title = esc_html($ctags_lc{$ctag}->{topname});
3027                         $title =~ s/ /&nbsp;/g;
3028                         $title =~ s/^/&nbsp;/g;
3029                         $title =~ s/$/&nbsp;/g;
3030                         if (defined $matched && $matched eq $ctag) {
3031                                 $title = qq(<span class="match">$title</span>);
3032                         }
3033                         $cloud->add($title, href(-replay=>1, action=>$action, ctag_filter=>$ctag),
3034                                     $ctags_lc{$ctag}->{count});
3035                 }
3036         } else {
3037                 $cloud = {};
3038                 foreach my $ctag (keys %ctags_lc) {
3039                         my $title = esc_html($ctags_lc{$ctag}->{topname}, -nbsp=>1);
3040                         if (defined $matched && $matched eq $ctag) {
3041                                 $title = qq(<span class="match">$title</span>);
3042                         }
3043                         $cloud->{$ctag}{count} = $ctags_lc{$ctag}->{count};
3044                         $cloud->{$ctag}{ctag} =
3045                                 $cgi->a({-href=>href(-replay=>1, action=>$action, ctag_filter=>$ctag)}, $title);
3046                 }
3047         }
3048         return $cloud;
3049 }
3050
3051 sub git_show_project_tagcloud {
3052         my ($cloud, $count) = @_;
3053         if (ref $cloud eq 'HTML::TagCloud') {
3054                 return $cloud->html_and_css($count);
3055         } else {
3056                 my @tags = sort { $cloud->{$a}->{'count'} <=> $cloud->{$b}->{'count'} } keys %$cloud;
3057                 return
3058                         '<div id="htmltagcloud"'.($project ? '' : ' align="center"').'>' .
3059                         join (', ', map {
3060                                 $cloud->{$_}->{'ctag'}
3061                         } splice(@tags, 0, $count)) .
3062                         '</div>';
3063         }
3064 }
3065
3066 sub git_get_project_url_list {
3067         my $path = shift;
3068
3069         $git_dir = "$projectroot/$path";
3070         open my $fd, '<', "$git_dir/cloneurl"
3071                 or return wantarray ?
3072                 @{ config_to_multi(git_get_project_config('url')) } :
3073                    config_to_multi(git_get_project_config('url'));
3074         my @git_project_url_list = map { chomp; $_ } <$fd>;
3075         close $fd;
3076
3077         return wantarray ? @git_project_url_list : \@git_project_url_list;
3078 }
3079
3080 sub git_get_projects_list {
3081         my $filter = shift || '';
3082         my $paranoid = shift;
3083         my @list;
3084
3085         if (-d $projects_list) {
3086                 # search in directory
3087                 my $dir = $projects_list;
3088                 # remove the trailing "/"
3089                 $dir =~ s!/+$!!;
3090                 my $pfxlen = length("$dir");
3091                 my $pfxdepth = ($dir =~ tr!/!!);
3092                 # when filtering, search only given subdirectory
3093                 if ($filter && !$paranoid) {
3094                         $dir .= "/$filter";
3095                         $dir =~ s!/+$!!;
3096                 }
3097
3098                 File::Find::find({
3099                         follow_fast => 1, # follow symbolic links
3100                         follow_skip => 2, # ignore duplicates
3101                         dangling_symlinks => 0, # ignore dangling symlinks, silently
3102                         wanted => sub {
3103                                 # global variables
3104                                 our $project_maxdepth;
3105                                 our $projectroot;
3106                                 # skip project-list toplevel, if we get it.
3107                                 return if (m!^[/.]$!);
3108                                 # only directories can be git repositories
3109                                 return unless (-d $_);
3110                                 # don't traverse too deep (Find is super slow on os x)
3111                                 # $project_maxdepth excludes depth of $projectroot
3112                                 if (($File::Find::name =~ tr!/!!) - $pfxdepth > $project_maxdepth) {
3113                                         $File::Find::prune = 1;
3114                                         return;
3115                                 }
3116
3117                                 my $path = substr($File::Find::name, $pfxlen + 1);
3118                                 # paranoidly only filter here
3119                                 if ($paranoid && $filter && $path !~ m!^\Q$filter\E/!) {
3120                                         next;
3121                                 }
3122                                 # we check related file in $projectroot
3123                                 if (check_export_ok("$projectroot/$path")) {
3124                                         push @list, { path => $path };
3125                                         $File::Find::prune = 1;
3126                                 }
3127                         },
3128                 }, "$dir");
3129
3130         } elsif (-f $projects_list) {
3131                 # read from file(url-encoded):
3132                 # 'git%2Fgit.git Linus+Torvalds'
3133                 # 'libs%2Fklibc%2Fklibc.git H.+Peter+Anvin'
3134                 # 'linux%2Fhotplug%2Fudev.git Greg+Kroah-Hartman'
3135                 open my $fd, '<', $projects_list or return;
3136         PROJECT:
3137                 while (my $line = <$fd>) {
3138                         chomp $line;
3139                         my ($path, $owner) = split ' ', $line;
3140                         $path = unescape($path);
3141                         $owner = unescape($owner);
3142                         if (!defined $path) {
3143                                 next;
3144                         }
3145                         # if $filter is rpovided, check if $path begins with $filter
3146                         if ($filter && $path !~ m!^\Q$filter\E/!) {
3147                                 next;
3148                         }
3149                         if (check_export_ok("$projectroot/$path")) {
3150                                 my $pr = {
3151                                         path => $path
3152                                 };
3153                                 if ($owner) {
3154                                         $pr->{'owner'} = to_utf8($owner);
3155                                 }
3156                                 push @list, $pr;
3157                         }
3158                 }
3159                 close $fd;
3160         }
3161         return @list;
3162 }
3163
3164 # written with help of Tree::Trie module (Perl Artistic License, GPL compatibile)
3165 # as side effects it sets 'forks' field to list of forks for forked projects
3166 sub filter_forks_from_projects_list {
3167         my $projects = shift;
3168
3169         my %trie; # prefix tree of directories (path components)
3170         # generate trie out of those directories that might contain forks
3171         foreach my $pr (@$projects) {
3172                 my $path = $pr->{'path'};
3173                 $path =~ s/\.git$//;      # forks of 'repo.git' are in 'repo/' directory
3174                 next if ($path =~ m!/$!); # skip non-bare repositories, e.g. 'repo/.git'
3175                 next unless ($path);      # skip '.git' repository: tests, git-instaweb
3176                 next unless (-d "$projectroot/$path"); # containing directory exists
3177                 $pr->{'forks'} = [];      # there can be 0 or more forks of project
3178
3179                 # add to trie
3180                 my @dirs = split('/', $path);
3181                 # walk the trie, until either runs out of components or out of trie
3182                 my $ref = \%trie;
3183                 while (scalar @dirs &&
3184                        exists($ref->{$dirs[0]})) {
3185                         $ref = $ref->{shift @dirs};
3186                 }
3187                 # create rest of trie structure from rest of components
3188                 foreach my $dir (@dirs) {
3189                         $ref = $ref->{$dir} = {};
3190                 }
3191                 # create end marker, store $pr as a data
3192                 $ref->{''} = $pr if (!exists $ref->{''});
3193         }
3194
3195         # filter out forks, by finding shortest prefix match for paths
3196         my @filtered;
3197  PROJECT:
3198         foreach my $pr (@$projects) {
3199                 # trie lookup
3200                 my $ref = \%trie;
3201         DIR:
3202                 foreach my $dir (split('/', $pr->{'path'})) {
3203                         if (exists $ref->{''}) {
3204                                 # found [shortest] prefix, is a fork - skip it
3205                                 push @{$ref->{''}{'forks'}}, $pr;
3206                                 next PROJECT;
3207                         }
3208                         if (!exists $ref->{$dir}) {
3209                                 # not in trie, cannot have prefix, not a fork
3210                                 push @filtered, $pr;
3211                                 next PROJECT;
3212                         }
3213                         # If the dir is there, we just walk one step down the trie.
3214                         $ref = $ref->{$dir};
3215                 }
3216                 # we ran out of trie
3217                 # (shouldn't happen: it's either no match, or end marker)
3218                 push @filtered, $pr;
3219         }
3220
3221         return @filtered;
3222 }
3223
3224 # note: fill_project_list_info must be run first,
3225 # for 'descr_long' and 'ctags' to be filled
3226 sub search_projects_list {
3227         my ($projlist, %opts) = @_;
3228         my $tagfilter  = $opts{'tagfilter'};
3229         my $search_re = $opts{'search_regexp'};
3230
3231         return @$projlist
3232                 unless ($tagfilter || $search_re);
3233
3234         # searching projects require filling to be run before it;
3235         fill_project_list_info($projlist,
3236                                $tagfilter  ? 'ctags' : (),
3237                                $search_re ? ('path', 'descr') : ());
3238         my @projects;
3239  PROJECT:
3240         foreach my $pr (@$projlist) {
3241
3242                 if ($tagfilter) {
3243                         next unless ref($pr->{'ctags'}) eq 'HASH';
3244                         next unless
3245                                 grep { lc($_) eq lc($tagfilter) } keys %{$pr->{'ctags'}};
3246                 }
3247
3248                 if ($search_re) {
3249                         next unless
3250                                 $pr->{'path'} =~ /$search_re/ ||
3251                                 $pr->{'descr_long'} =~ /$search_re/;
3252                 }
3253
3254                 push @projects, $pr;
3255         }
3256
3257         return @projects;
3258 }
3259
3260 our $gitweb_project_owner = undef;
3261 sub git_get_project_list_from_file {
3262
3263         return if (defined $gitweb_project_owner);
3264
3265         $gitweb_project_owner = {};
3266         # read from file (url-encoded):
3267         # 'git%2Fgit.git Linus+Torvalds'
3268         # 'libs%2Fklibc%2Fklibc.git H.+Peter+Anvin'
3269         # 'linux%2Fhotplug%2Fudev.git Greg+Kroah-Hartman'
3270         if (-f $projects_list) {
3271                 open(my $fd, '<', $projects_list);
3272                 while (my $line = <$fd>) {
3273                         chomp $line;
3274                         my ($pr, $ow) = split ' ', $line;
3275                         $pr = unescape($pr);
3276                         $ow = unescape($ow);
3277                         $gitweb_project_owner->{$pr} = to_utf8($ow);
3278                 }
3279                 close $fd;
3280         }
3281 }
3282
3283 sub git_get_project_owner {
3284         my $project = shift;
3285         my $owner;
3286
3287         return undef unless $project;
3288         $git_dir = "$projectroot/$project";
3289
3290         if (!defined $gitweb_project_owner) {
3291                 git_get_project_list_from_file();
3292         }
3293
3294         if (exists $gitweb_project_owner->{$project}) {
3295                 $owner = $gitweb_project_owner->{$project};
3296         }
3297         if (!defined $owner){
3298                 $owner = git_get_project_config('owner');
3299         }
3300         if (!defined $owner) {
3301                 $owner = get_file_owner("$git_dir");
3302         }
3303
3304         return $owner;
3305 }
3306
3307 sub parse_activity_date {
3308         my $dstr = shift;
3309
3310         if ($dstr =~ /^\s*([-+]?\d+)(?:\s+([-+]\d{4}))?\s*$/) {
3311                 # Unix timestamp
3312                 return 0 + $1;
3313         }
3314         if ($dstr =~ /^\s*(\d{4})-(\d{2})-(\d{2})[Tt _](\d{1,2}):(\d{2}):(\d{2})(?:[ _]?([Zz]|(?:[-+]\d{1,2}:?\d{2})))?\s*$/) {
3315                 my ($Y,$m,$d,$H,$M,$S,$z) = ($1,$2,$3,$4,$5,$6,$7||'');
3316                 my $seconds = timegm(0+$S, 0+$M, 0+$H, 0+$d, $m-1, $Y-1900);
3317                 defined($z) && $z ne '' or $z = 'Z';
3318                 $z =~ s/://;
3319                 substr($z,1,0) = '0' if length($z) == 4;
3320                 my $off = 0;
3321                 if (uc($z) ne 'Z') {
3322                         $off = 60 * (60 * (0+substr($z,1,2)) + (0+substr($z,3,2)));
3323                         $off = -$off if substr($z,0,1) eq '-';
3324                 }
3325                 return $seconds - $off;
3326         }
3327         return undef;
3328 }
3329
3330 # If $quick is true only look at $lastactivity_file
3331 sub git_get_last_activity {
3332         my ($path, $quick) = @_;
3333         my $fd;
3334
3335         $git_dir = "$projectroot/$path";
3336         if ($lastactivity_file && open($fd, "<", "$git_dir/$lastactivity_file")) {
3337                 my $activity = <$fd>;
3338                 close $fd;
3339                 return (undef, undef) unless defined $activity;
3340                 chomp $activity;
3341                 return (undef, undef) if $activity eq '';
3342                 if (my $timestamp = parse_activity_date($activity)) {
3343                         my $age = time - $timestamp;
3344                         return ($age, age_string($age));
3345                 }
3346         }
3347         return (undef, undef) if $quick;
3348         open($fd, "-|", git_cmd(), 'for-each-ref',
3349              '--format=%(committer)',
3350              '--sort=-committerdate',
3351              '--count=1',
3352              map { "refs/$_" } get_branch_refs ()) or return;
3353         my $most_recent = <$fd>;
3354         close $fd or return;
3355         if (defined $most_recent &&
3356             $most_recent =~ / (\d+) [-+][01]\d\d\d$/) {
3357                 my $timestamp = $1;
3358                 my $age = time - $timestamp;
3359                 return ($age, age_string($age));
3360         }
3361         return (undef, undef);
3362 }
3363
3364 # Implementation note: when a single remote is wanted, we cannot use 'git
3365 # remote show -n' because that command always work (assuming it's a remote URL
3366 # if it's not defined), and we cannot use 'git remote show' because that would
3367 # try to make a network roundtrip. So the only way to find if that particular
3368 # remote is defined is to walk the list provided by 'git remote -v' and stop if
3369 # and when we find what we want.
3370 sub git_get_remotes_list {
3371         my $wanted = shift;
3372         my %remotes = ();
3373
3374         open my $fd, '-|' , git_cmd(), 'remote', '-v';
3375         return unless $fd;
3376         while (my $remote = <$fd>) {
3377                 chomp $remote;
3378                 $remote =~ s!\t(.*?)\s+\((\w+)\)$!!;
3379                 next if $wanted and not $remote eq $wanted;
3380                 my ($url, $key) = ($1, $2);
3381
3382                 $remotes{$remote} ||= { 'heads' => () };
3383                 $remotes{$remote}{$key} = $url;
3384         }
3385         close $fd or return;
3386         return wantarray ? %remotes : \%remotes;
3387 }
3388
3389 # Takes a hash of remotes as first parameter and fills it by adding the
3390 # available remote heads for each of the indicated remotes.
3391 sub fill_remote_heads {
3392         my $remotes = shift;
3393         my @heads = map { "remotes/$_" } keys %$remotes;
3394         my @remoteheads = git_get_heads_list(undef, @heads);
3395         foreach my $remote (keys %$remotes) {
3396                 $remotes->{$remote}{'heads'} = [ grep {
3397                         $_->{'name'} =~ s!^$remote/!!
3398                         } @remoteheads ];
3399         }
3400 }
3401
3402 sub git_get_references {
3403         my $type = shift || "";
3404         my %refs;
3405         # 5dc01c595e6c6ec9ccda4f6f69c131c0dd945f8c refs/tags/v2.6.11
3406         # c39ae07f393806ccf406ef966e9a15afc43cc36a refs/tags/v2.6.11^{}
3407         open my $fd, "-|", git_cmd(), "show-ref", "--dereference",
3408                 ($type ? ("--", "refs/$type") : ()) # use -- <pattern> if $type
3409                 or return;
3410
3411         while (my $line = <$fd>) {
3412                 chomp $line;
3413                 if ($line =~ m!^([0-9a-fA-F]{40})\srefs/($type.*)$!) {
3414                         if (defined $refs{$1}) {
3415                                 push @{$refs{$1}}, $2;
3416                         } else {
3417                                 $refs{$1} = [ $2 ];
3418                         }
3419                 }
3420         }
3421         close $fd or return;
3422         return \%refs;
3423 }
3424
3425 sub git_get_rev_name_tags {
3426         my $hash = shift || return undef;
3427
3428         open my $fd, "-|", git_cmd(), "name-rev", "--tags", $hash
3429                 or return;
3430         my $name_rev = <$fd>;
3431         close $fd;
3432
3433         if ($name_rev =~ m|^$hash tags/(.*)$|) {
3434                 return $1;
3435         } else {
3436                 # catches also '$hash undefined' output
3437                 return undef;
3438         }
3439 }
3440
3441 ## ----------------------------------------------------------------------
3442 ## parse to hash functions
3443
3444 sub parse_date {
3445         my $epoch = shift;
3446         my $tz = shift || "-0000";
3447
3448         my %date;
3449         my @months = ("Jan", "Feb", "Mar", "Apr", "May", "Jun", "Jul", "Aug", "Sep", "Oct", "Nov", "Dec");
3450         my @days = ("Sun", "Mon", "Tue", "Wed", "Thu", "Fri", "Sat");
3451         my ($sec, $min, $hour, $mday, $mon, $year, $wday, $yday) = gmtime($epoch);
3452         $date{'hour'} = $hour;
3453         $date{'minute'} = $min;
3454         $date{'mday'} = $mday;
3455         $date{'day'} = $days[$wday];
3456         $date{'month'} = $months[$mon];
3457         $date{'rfc2822'}   = sprintf "%s, %d %s %4d %02d:%02d:%02d +0000",
3458                              $days[$wday], $mday, $months[$mon], 1900+$year, $hour ,$min, $sec;
3459         $date{'mday-time'} = sprintf "%d %s %02d:%02d",
3460                              $mday, $months[$mon], $hour ,$min;
3461         $date{'iso-8601'}  = sprintf "%04d-%02d-%02dT%02d:%02d:%02dZ",
3462                              1900+$year, 1+$mon, $mday, $hour ,$min, $sec;
3463
3464         my ($tz_sign, $tz_hour, $tz_min) =
3465                 ($tz =~ m/^([-+])(\d\d)(\d\d)$/);
3466         $tz_sign = ($tz_sign eq '-' ? -1 : +1);
3467         my $local = $epoch + $tz_sign*((($tz_hour*60) + $tz_min)*60);
3468         ($sec, $min, $hour, $mday, $mon, $year, $wday, $yday) = gmtime($local);
3469         $date{'hour_local'} = $hour;
3470         $date{'minute_local'} = $min;
3471         $date{'tz_local'} = $tz;
3472         $date{'iso-tz'} = sprintf("%04d-%02d-%02d %02d:%02d:%02d %s",
3473                                   1900+$year, $mon+1, $mday,
3474                                   $hour, $min, $sec, $tz);
3475         return %date;
3476 }
3477
3478 sub parse_tag {
3479         my $tag_id = shift;
3480         my %tag;
3481         my @comment;
3482
3483         open my $fd, "-|", git_cmd(), "cat-file", "tag", $tag_id or return;
3484         $tag{'id'} = $tag_id;
3485         while (my $line = <$fd>) {
3486                 chomp $line;
3487                 if ($line =~ m/^object ([0-9a-fA-F]{40})$/) {
3488                         $tag{'object'} = $1;
3489                 } elsif ($line =~ m/^type (.+)$/) {
3490                         $tag{'type'} = $1;
3491                 } elsif ($line =~ m/^tag (.+)$/) {
3492                         $tag{'name'} = $1;
3493                 } elsif ($line =~ m/^tagger (.*) ([0-9]+) (.*)$/) {
3494                         $tag{'author'} = $1;
3495                         $tag{'author_epoch'} = $2;
3496                         $tag{'author_tz'} = $3;
3497                         if ($tag{'author'} =~ m/^([^<]+) <([^>]*)>/) {
3498                                 $tag{'author_name'}  = $1;
3499                                 $tag{'author_email'} = $2;
3500                         } else {
3501                                 $tag{'author_name'} = $tag{'author'};
3502                         }
3503                 } elsif ($line =~ m/--BEGIN/) {
3504                         push @comment, $line;
3505                         last;
3506                 } elsif ($line eq "") {
3507                         last;
3508                 }
3509         }
3510         push @comment, <$fd>;
3511         $tag{'comment'} = \@comment;
3512         close $fd or return;
3513         if (!defined $tag{'name'}) {
3514                 return
3515         };
3516         return %tag
3517 }
3518
3519 sub parse_commit_text {
3520         my ($commit_text, $withparents) = @_;
3521         my @commit_lines = split '\n', $commit_text;
3522         my %co;
3523
3524         pop @commit_lines; # Remove '\0'
3525
3526         if (! @commit_lines) {
3527                 return;
3528         }
3529
3530         my $header = shift @commit_lines;
3531         if ($header !~ m/^[0-9a-fA-F]{40}/) {
3532                 return;
3533         }
3534         ($co{'id'}, my @parents) = split ' ', $header;
3535         while (my $line = shift @commit_lines) {
3536                 last if $line eq "\n";
3537                 if ($line =~ m/^tree ([0-9a-fA-F]{40})$/) {
3538                         $co{'tree'} = $1;
3539                 } elsif ((!defined $withparents) && ($line =~ m/^parent ([0-9a-fA-F]{40})$/)) {
3540                         push @parents, $1;
3541                 } elsif ($line =~ m/^author (.*) ([0-9]+) (.*)$/) {
3542                         $co{'author'} = to_utf8($1);
3543                         $co{'author_epoch'} = $2;
3544                         $co{'author_tz'} = $3;
3545                         if ($co{'author'} =~ m/^([^<]+) <([^>]*)>/) {
3546                                 $co{'author_name'}  = $1;
3547                                 $co{'author_email'} = $2;
3548                         } else {
3549                                 $co{'author_name'} = $co{'author'};
3550                         }
3551                 } elsif ($line =~ m/^committer (.*) ([0-9]+) (.*)$/) {
3552                         $co{'committer'} = to_utf8($1);
3553                         $co{'committer_epoch'} = $2;
3554                         $co{'committer_tz'} = $3;
3555                         if ($co{'committer'} =~ m/^([^<]+) <([^>]*)>/) {
3556                                 $co{'committer_name'}  = $1;
3557                                 $co{'committer_email'} = $2;
3558                         } else {
3559                                 $co{'committer_name'} = $co{'committer'};
3560                         }
3561                 }
3562         }
3563         if (!defined $co{'tree'}) {
3564                 return;
3565         };
3566         $co{'parents'} = \@parents;
3567         $co{'parent'} = $parents[0];
3568
3569         foreach my $title (@commit_lines) {
3570                 $title =~ s/^    //;
3571                 if ($title ne "") {
3572                         $co{'title'} = chop_str($title, 80, 5);
3573                         # remove leading stuff of merges to make the interesting part visible
3574                         if (length($title) > 50) {
3575                                 $title =~ s/^Automatic //;
3576                                 $title =~ s/^merge (of|with) /Merge ... /i;
3577                                 if (length($title) > 50) {
3578                                         $title =~ s/(http|rsync):\/\///;
3579                                 }
3580                                 if (length($title) > 50) {
3581                                         $title =~ s/(master|www|rsync)\.//;
3582                                 }
3583                                 if (length($title) > 50) {
3584                                         $title =~ s/kernel.org:?//;
3585                                 }
3586                                 if (length($title) > 50) {
3587                                         $title =~ s/\/pub\/scm//;
3588                                 }
3589                         }
3590                         $co{'title_short'} = chop_str($title, 50, 5);
3591                         last;
3592                 }
3593         }
3594         if (! defined $co{'title'} || $co{'title'} eq "") {
3595                 $co{'title'} = $co{'title_short'} = '(no commit message)';
3596         }
3597         # remove added spaces
3598         foreach my $line (@commit_lines) {
3599                 $line =~ s/^    //;
3600         }
3601         $co{'comment'} = \@commit_lines;
3602
3603         my $age = time - $co{'committer_epoch'};
3604         $co{'age'} = $age;
3605         $co{'age_string'} = age_string($age);
3606         my ($sec, $min, $hour, $mday, $mon, $year, $wday, $yday) = gmtime($co{'committer_epoch'});
3607         if ($age > 60*60*24*7*2) {
3608                 $co{'age_string_date'} = sprintf "%4i-%02u-%02i", 1900 + $year, $mon+1, $mday;
3609                 $co{'age_string_age'} = $co{'age_string'};
3610         } else {
3611                 $co{'age_string_date'} = $co{'age_string'};
3612                 $co{'age_string_age'} = sprintf "%4i-%02u-%02i", 1900 + $year, $mon+1, $mday;
3613         }
3614         return %co;
3615 }
3616
3617 sub parse_commit {
3618         my ($commit_id) = @_;
3619         my %co;
3620
3621         local $/ = "\0";
3622
3623         open my $fd, "-|", git_cmd(), "rev-list",
3624                 "--parents",
3625                 "--header",
3626                 "--max-count=1",
3627                 $commit_id,
3628                 "--",
3629                 or die_error(500, "Open git-rev-list failed");
3630         %co = parse_commit_text(<$fd>, 1);
3631         close $fd;
3632
3633         return %co;
3634 }
3635
3636 sub parse_commits {
3637         my ($commit_id, $maxcount, $skip, $filename, @args) = @_;
3638         my @cos;
3639
3640         $maxcount ||= 1;
3641         $skip ||= 0;
3642
3643         local $/ = "\0";
3644
3645         open my $fd, "-|", git_cmd(), "rev-list",
3646                 "--header",
3647                 @args,
3648                 ("--max-count=" . $maxcount),
3649                 ("--skip=" . $skip),
3650                 @extra_options,
3651                 $commit_id,
3652                 "--",
3653                 ($filename ? ($filename) : ())
3654                 or die_error(500, "Open git-rev-list failed");
3655         while (my $line = <$fd>) {
3656                 my %co = parse_commit_text($line);
3657                 push @cos, \%co;
3658         }
3659         close $fd;
3660
3661         return wantarray ? @cos : \@cos;
3662 }
3663
3664 # parse line of git-diff-tree "raw" output
3665 sub parse_difftree_raw_line {
3666         my $line = shift;
3667         my %res;
3668
3669         # ':100644 100644 03b218260e99b78c6df0ed378e59ed9205ccc96d 3b93d5e7cc7f7dd4ebed13a5cc1a4ad976fc94d8 M   ls-files.c'
3670         # ':100644 100644 7f9281985086971d3877aca27704f2aaf9c448ce bc190ebc71bbd923f2b728e505408f5e54bd073a M   rev-tree.c'
3671         if ($line =~ m/^:([0-7]{6}) ([0-7]{6}) ([0-9a-fA-F]{40}) ([0-9a-fA-F]{40}) (.)([0-9]{0,3})\t(.*)$/) {
3672                 $res{'from_mode'} = $1;
3673                 $res{'to_mode'} = $2;
3674                 $res{'from_id'} = $3;
3675                 $res{'to_id'} = $4;
3676                 $res{'status'} = $5;
3677                 $res{'similarity'} = $6;
3678                 if ($res{'status'} eq 'R' || $res{'status'} eq 'C') { # renamed or copied
3679                         ($res{'from_file'}, $res{'to_file'}) = map { unquote($_) } split("\t", $7);
3680                 } else {
3681                         $res{'from_file'} = $res{'to_file'} = $res{'file'} = unquote($7);
3682                 }
3683         }
3684         # '::100755 100755 100755 60e79ca1b01bc8b057abe17ddab484699a7f5fdb 94067cc5f73388f33722d52ae02f44692bc07490 94067cc5f73388f33722d52ae02f44692bc07490 MR git-gui/git-gui.sh'
3685         # combined diff (for merge commit)
3686         elsif ($line =~ s/^(::+)((?:[0-7]{6} )+)((?:[0-9a-fA-F]{40} )+)([a-zA-Z]+)\t(.*)$//) {
3687                 $res{'nparents'}  = length($1);
3688                 $res{'from_mode'} = [ split(' ', $2) ];
3689                 $res{'to_mode'} = pop @{$res{'from_mode'}};
3690                 $res{'from_id'} = [ split(' ', $3) ];
3691                 $res{'to_id'} = pop @{$res{'from_id'}};
3692                 $res{'status'} = [ split('', $4) ];
3693                 $res{'to_file'} = unquote($5);
3694         }
3695         # 'c512b523472485aef4fff9e57b229d9d243c967f'
3696         elsif ($line =~ m/^([0-9a-fA-F]{40})$/) {
3697                 $res{'commit'} = $1;
3698         }
3699
3700         return wantarray ? %res : \%res;
3701 }
3702
3703 # wrapper: return parsed line of git-diff-tree "raw" output
3704 # (the argument might be raw line, or parsed info)
3705 sub parsed_difftree_line {
3706         my $line_or_ref = shift;
3707
3708         if (ref($line_or_ref) eq "HASH") {
3709                 # pre-parsed (or generated by hand)
3710                 return $line_or_ref;
3711         } else {
3712                 return parse_difftree_raw_line($line_or_ref);
3713         }
3714 }
3715
3716 # parse line of git-ls-tree output
3717 sub parse_ls_tree_line {
3718         my $line = shift;
3719         my %opts = @_;
3720         my %res;
3721
3722         if ($opts{'-l'}) {
3723                 #'100644 blob 0fa3f3a66fb6a137f6ec2c19351ed4d807070ffa   16717  panic.c'
3724                 $line =~ m/^([0-9]+) (.+) ([0-9a-fA-F]{40}) +(-|[0-9]+)\t(.+)$/s;
3725
3726                 $res{'mode'} = $1;
3727                 $res{'type'} = $2;
3728                 $res{'hash'} = $3;
3729                 $res{'size'} = $4;
3730                 if ($opts{'-z'}) {
3731                         $res{'name'} = $5;
3732                 } else {
3733                         $res{'name'} = unquote($5);
3734                 }
3735         } else {
3736                 #'100644 blob 0fa3f3a66fb6a137f6ec2c19351ed4d807070ffa  panic.c'
3737                 $line =~ m/^([0-9]+) (.+) ([0-9a-fA-F]{40})\t(.+)$/s;
3738
3739                 $res{'mode'} = $1;
3740                 $res{'type'} = $2;
3741                 $res{'hash'} = $3;
3742                 if ($opts{'-z'}) {
3743                         $res{'name'} = $4;
3744                 } else {
3745                         $res{'name'} = unquote($4);
3746                 }
3747         }
3748
3749         return wantarray ? %res : \%res;
3750 }
3751
3752 # generates _two_ hashes, references to which are passed as 2 and 3 argument
3753 sub parse_from_to_diffinfo {
3754         my ($diffinfo, $from, $to, @parents) = @_;
3755
3756         if ($diffinfo->{'nparents'}) {
3757                 # combined diff
3758                 $from->{'file'} = [];
3759                 $from->{'href'} = [];
3760                 fill_from_file_info($diffinfo, @parents)
3761                         unless exists $diffinfo->{'from_file'};
3762                 for (my $i = 0; $i < $diffinfo->{'nparents'}; $i++) {
3763                         $from->{'file'}[$i] =
3764                                 defined $diffinfo->{'from_file'}[$i] ?
3765                                         $diffinfo->{'from_file'}[$i] :
3766                                         $diffinfo->{'to_file'};
3767                         if ($diffinfo->{'status'}[$i] ne "A") { # not new (added) file
3768                                 $from->{'href'}[$i] = href(action=>"blob",
3769                                                            hash_base=>$parents[$i],
3770                                                            hash=>$diffinfo->{'from_id'}[$i],
3771                                                            file_name=>$from->{'file'}[$i]);
3772                         } else {
3773                                 $from->{'href'}[$i] = undef;
3774                         }
3775                 }
3776         } else {
3777                 # ordinary (not combined) diff
3778                 $from->{'file'} = $diffinfo->{'from_file'};
3779                 if ($diffinfo->{'status'} ne "A") { # not new (added) file
3780                         $from->{'href'} = href(action=>"blob", hash_base=>$hash_parent,
3781                                                hash=>$diffinfo->{'from_id'},
3782                                                file_name=>$from->{'file'});
3783                 } else {
3784                         delete $from->{'href'};
3785                 }
3786         }
3787
3788         $to->{'file'} = $diffinfo->{'to_file'};
3789         if (!is_deleted($diffinfo)) { # file exists in result
3790                 $to->{'href'} = href(action=>"blob", hash_base=>$hash,
3791                                      hash=>$diffinfo->{'to_id'},
3792                                      file_name=>$to->{'file'});
3793         } else {
3794                 delete $to->{'href'};
3795         }
3796 }
3797
3798 ## ......................................................................
3799 ## parse to array of hashes functions
3800
3801 sub git_get_heads_list {
3802         my ($limit, @classes) = @_;
3803         @classes = get_branch_refs() unless @classes;
3804         my @patterns = map { "refs/$_" } @classes;
3805         my @headslist;
3806
3807         open my $fd, '-|', git_cmd(), 'for-each-ref',
3808                 ($limit ? '--count='.($limit+1) : ()), '--sort=-committerdate',
3809                 '--format=%(objectname) %(refname) %(subject)%00%(committer)',
3810                 @patterns
3811                 or return;
3812         while (my $line = <$fd>) {
3813                 my %ref_item;
3814
3815                 chomp $line;
3816                 my ($refinfo, $committerinfo) = split(/\0/, $line);
3817                 my ($hash, $name, $title) = split(' ', $refinfo, 3);
3818                 my ($committer, $epoch, $tz) =
3819                         ($committerinfo =~ /^(.*) ([0-9]+) (.*)$/);
3820                 $ref_item{'fullname'}  = $name;
3821                 my $strip_refs = join '|', map { quotemeta } get_branch_refs();
3822                 $name =~ s!^refs/($strip_refs|remotes)/!!;
3823                 $ref_item{'name'} = $name;
3824                 # for refs neither in 'heads' nor 'remotes' we want to
3825                 # show their ref dir
3826                 my $ref_dir = (defined $1) ? $1 : '';
3827                 if ($ref_dir ne '' and $ref_dir ne 'heads' and $ref_dir ne 'remotes') {
3828                     $ref_item{'name'} .= ' (' . $ref_dir . ')';
3829                 }
3830
3831                 $ref_item{'id'}    = $hash;
3832                 $ref_item{'title'} = $title || '(no commit message)';
3833                 $ref_item{'epoch'} = $epoch;
3834                 if ($epoch) {
3835                         $ref_item{'age'} = age_string(time - $ref_item{'epoch'});
3836                 } else {
3837                         $ref_item{'age'} = "unknown";
3838                 }
3839
3840                 push @headslist, \%ref_item;
3841         }
3842         close $fd;
3843
3844         return wantarray ? @headslist : \@headslist;
3845 }
3846
3847 sub git_get_tags_list {
3848         my $limit = shift;
3849         my @tagslist;
3850
3851         open my $fd, '-|', git_cmd(), 'for-each-ref',
3852                 ($limit ? '--count='.($limit+1) : ()), '--sort=-creatordate',
3853                 '--format=%(objectname) %(objecttype) %(refname) '.
3854                 '%(*objectname) %(*objecttype) %(subject)%00%(creator)',
3855                 'refs/tags'
3856                 or return;
3857         while (my $line = <$fd>) {
3858                 my %ref_item;
3859
3860                 chomp $line;
3861                 my ($refinfo, $creatorinfo) = split(/\0/, $line);
3862                 my ($id, $type, $name, $refid, $reftype, $title) = split(' ', $refinfo, 6);
3863                 my ($creator, $epoch, $tz) =
3864                         ($creatorinfo =~ /^(.*) ([0-9]+) (.*)$/);
3865                 $ref_item{'fullname'} = $name;
3866                 $name =~ s!^refs/tags/!!;
3867
3868                 $ref_item{'type'} = $type;
3869                 $ref_item{'id'} = $id;
3870                 $ref_item{'name'} = $name;
3871                 if ($type eq "tag") {
3872                         $ref_item{'subject'} = $title;
3873                         $ref_item{'reftype'} = $reftype;
3874                         $ref_item{'refid'}   = $refid;
3875                 } else {
3876                         $ref_item{'reftype'} = $type;
3877                         $ref_item{'refid'}   = $id;
3878                 }
3879
3880                 if ($type eq "tag" || $type eq "commit") {
3881                         $ref_item{'epoch'} = $epoch;
3882                         if ($epoch) {
3883                                 $ref_item{'age'} = age_string(time - $ref_item{'epoch'});
3884                         } else {
3885                                 $ref_item{'age'} = "unknown";
3886                         }
3887                 }
3888
3889                 push @tagslist, \%ref_item;
3890         }
3891         close $fd;
3892
3893         return wantarray ? @tagslist : \@tagslist;
3894 }
3895
3896 ## ----------------------------------------------------------------------
3897 ## filesystem-related functions
3898
3899 sub get_file_owner {
3900         my $path = shift;
3901
3902         my ($dev, $ino, $mode, $nlink, $st_uid, $st_gid, $rdev, $size) = stat($path);
3903         my ($name, $passwd, $uid, $gid, $quota, $comment, $gcos, $dir, $shell) = getpwuid($st_uid);
3904         if (!defined $gcos) {
3905                 return undef;
3906         }
3907         my $owner = $gcos;
3908         $owner =~ s/[,;].*$//;
3909         return to_utf8($owner);
3910 }
3911
3912 # assume that file exists
3913 sub insert_file {
3914         my $filename = shift;
3915
3916         open my $fd, '<', $filename;
3917         print map { to_utf8($_) } <$fd>;
3918         close $fd;
3919 }
3920
3921 ## ......................................................................
3922 ## mimetype related functions
3923
3924 sub mimetype_guess_file {
3925         my $filename = shift;
3926         my $mimemap = shift;
3927         -r $mimemap or return undef;
3928
3929         my %mimemap;
3930         open(my $mh, '<', $mimemap) or return undef;
3931         while (<$mh>) {
3932                 next if m/^#/; # skip comments
3933                 my ($mimetype, @exts) = split(/\s+/);
3934                 foreach my $ext (@exts) {
3935                         $mimemap{$ext} = $mimetype;
3936                 }
3937         }
3938         close($mh);
3939
3940         $filename =~ /\.([^.]*)$/;
3941         return $mimemap{$1};
3942 }
3943
3944 sub mimetype_guess {
3945         my $filename = shift;
3946         my $mime;
3947         $filename =~ /\./ or return undef;
3948
3949         if ($mimetypes_file) {
3950                 my $file = $mimetypes_file;
3951                 if ($file !~ m!^/!) { # if it is relative path
3952                         # it is relative to project
3953                         $file = "$projectroot/$project/$file";
3954                 }
3955                 $mime = mimetype_guess_file($filename, $file);
3956         }
3957         $mime ||= mimetype_guess_file($filename, '/etc/mime.types');
3958         return $mime;
3959 }
3960
3961 sub blob_mimetype {
3962         my $fd = shift;
3963         my $filename = shift;
3964
3965         if ($filename) {
3966                 my $mime = mimetype_guess($filename);
3967                 $mime and return $mime;
3968         }
3969
3970         # just in case
3971         return $default_blob_plain_mimetype unless $fd;
3972
3973         if (-T $fd) {
3974                 return 'text/plain';
3975         } elsif (! $filename) {
3976                 return 'application/octet-stream';
3977         } elsif ($filename =~ m/\.png$/i) {
3978                 return 'image/png';
3979         } elsif ($filename =~ m/\.gif$/i) {
3980                 return 'image/gif';
3981         } elsif ($filename =~ m/\.jpe?g$/i) {
3982                 return 'image/jpeg';
3983         } else {
3984                 return 'application/octet-stream';
3985         }
3986 }
3987
3988 sub blob_contenttype {
3989         my ($fd, $file_name, $type) = @_;
3990
3991         $type ||= blob_mimetype($fd, $file_name);
3992         if ($type eq 'text/plain' && defined $default_text_plain_charset) {
3993                 $type .= "; charset=$default_text_plain_charset";
3994         }
3995
3996         return $type;
3997 }
3998
3999 # guess file syntax for syntax highlighting; return undef if no highlighting
4000 # the name of syntax can (in the future) depend on syntax highlighter used
4001 sub guess_file_syntax {
4002         my ($highlight, $mimetype, $file_name) = @_;
4003         return undef unless ($highlight && defined $file_name);
4004         my $basename = basename($file_name, '.in');
4005         return $highlight_basename{$basename}
4006                 if exists $highlight_basename{$basename};
4007
4008         $basename =~ /\.([^.]*)$/;
4009         my $ext = $1 or return undef;
4010         return $highlight_ext{$ext}
4011                 if exists $highlight_ext{$ext};
4012
4013         return undef;
4014 }
4015
4016 # run highlighter and return FD of its output,
4017 # or return original FD if no highlighting
4018 sub run_highlighter {
4019         my ($fd, $highlight, $syntax) = @_;
4020         return $fd unless ($highlight && defined $syntax);
4021
4022         close $fd;
4023         open $fd, quote_command(git_cmd(), "cat-file", "blob", $hash)." | ".
4024                   quote_command($highlight_bin).
4025                   " --replace-tabs=8 --fragment --syntax $syntax |"
4026                 or die_error(500, "Couldn't open file or run syntax highlighter");
4027         return $fd;
4028 }
4029
4030 ## ======================================================================
4031 ## functions printing HTML: header, footer, error page
4032
4033 sub get_page_title {
4034         my $title = to_utf8($site_name);
4035
4036         unless (defined $project) {
4037                 if (defined $project_filter) {
4038                         $title .= " - projects in '" . esc_path($project_filter) . "'";
4039                 }
4040                 return $title;
4041         }
4042         $title .= " - " . to_utf8($project);
4043
4044         return $title unless (defined $action);
4045         $title .= "/$action"; # $action is US-ASCII (7bit ASCII)
4046
4047         return $title unless (defined $file_name);
4048         $title .= " - " . esc_path($file_name);
4049         if ($action eq "tree" && $file_name !~ m|/$|) {
4050                 $title .= "/";
4051         }
4052
4053         return $title;
4054 }
4055
4056 sub get_content_type_html {
4057         # require explicit support from the UA if we are to send the page as
4058         # 'application/xhtml+xml', otherwise send it as plain old 'text/html'.
4059         # we have to do this because MSIE sometimes globs '*/*', pretending to
4060         # support xhtml+xml but choking when it gets what it asked for.
4061         if (defined $cgi->http('HTTP_ACCEPT') &&
4062             $cgi->http('HTTP_ACCEPT') =~ m/(,|;|\s|^)application\/xhtml\+xml(,|;|\s|$)/ &&
4063             $cgi->Accept('application/xhtml+xml') != 0) {
4064                 return 'application/xhtml+xml';
4065         } else {
4066                 return 'text/html';
4067         }
4068 }
4069
4070 sub print_feed_meta {
4071         if (defined $project) {
4072                 my %href_params = get_feed_info();
4073                 if (!exists $href_params{'-title'}) {
4074                         $href_params{'-title'} = 'log';
4075                 }
4076
4077                 foreach my $format (qw(RSS Atom)) {
4078                         my $type = lc($format);
4079                         my %link_attr = (
4080                                 '-rel' => 'alternate',
4081                                 '-title' => esc_attr("$project - $href_params{'-title'} - $format feed"),
4082                                 '-type' => "application/$type+xml"
4083                         );
4084
4085                         $href_params{'extra_options'} = undef;
4086                         $href_params{'action'} = $type;
4087                         $link_attr{'-href'} = href(%href_params);
4088                         print "<link ".
4089                               "rel=\"$link_attr{'-rel'}\" ".
4090                               "title=\"$link_attr{'-title'}\" ".
4091                               "href=\"$link_attr{'-href'}\" ".
4092                               "type=\"$link_attr{'-type'}\" ".
4093                               "/>\n";
4094
4095                         $href_params{'extra_options'} = '--no-merges';
4096                         $link_attr{'-href'} = href(%href_params);
4097                         $link_attr{'-title'} .= ' (no merges)';
4098                         print "<link ".
4099                               "rel=\"$link_attr{'-rel'}\" ".
4100                               "title=\"$link_attr{'-title'}\" ".
4101                               "href=\"$link_attr{'-href'}\" ".
4102                               "type=\"$link_attr{'-type'}\" ".
4103                               "/>\n";
4104                 }
4105
4106         } else {
4107                 printf('<link rel="alternate" title="%s projects list" '.
4108                        'href="%s" type="text/plain; charset=utf-8" />'."\n",
4109                        esc_attr($site_name), href(project=>undef, action=>"project_index"));
4110                 printf('<link rel="alternate" title="%s projects feeds" '.
4111                        'href="%s" type="text/x-opml" />'."\n",
4112                        esc_attr($site_name), href(project=>undef, action=>"opml"));
4113         }
4114 }
4115
4116 sub print_header_links {
4117         my $status = shift;
4118
4119         # print out each stylesheet that exist, providing backwards capability
4120         # for those people who defined $stylesheet in a config file
4121         if (defined $stylesheet) {
4122                 print '<link rel="stylesheet" type="text/css" href="'.esc_url($stylesheet).'"/>'."\n";
4123         } else {
4124                 foreach my $stylesheet (@stylesheets) {
4125                         next unless $stylesheet;
4126                         print '<link rel="stylesheet" type="text/css" href="'.esc_url($stylesheet).'"/>'."\n";
4127                 }
4128         }
4129         print_feed_meta()
4130                 if ($status eq '200 OK');
4131         if (defined $favicon) {
4132                 print qq(<link rel="shortcut icon" href=").esc_url($favicon).qq(" type="image/png" />\n);
4133         }
4134 }
4135
4136 sub print_nav_breadcrumbs_path {
4137         my $dirprefix = undef;
4138         while (my $part = shift) {
4139                 $dirprefix .= "/" if defined $dirprefix;
4140                 $dirprefix .= $part;
4141                 print $cgi->a({-href => href(project => undef,
4142                                              project_filter => $dirprefix,
4143                                              action => "project_list")},
4144                               esc_html($part)) . " / ";
4145         }
4146 }
4147
4148 sub print_nav_breadcrumbs {
4149         my %opts = @_;
4150
4151         for my $crumb (@extra_breadcrumbs, [ $home_link_str => $home_link ]) {
4152                 print $cgi->a({-href => esc_url($crumb->[1])}, $crumb->[0]) . " / ";
4153         }
4154         if (defined $project) {
4155                 my @dirname = split '/', $project;
4156                 my $projectbasename = pop @dirname;
4157                 print_nav_breadcrumbs_path(@dirname);
4158                 print $cgi->a({-href => href(action=>"summary")}, esc_html($projectbasename));
4159                 if (defined $action) {
4160                         my $action_print = $action ;
4161                         if (defined $opts{-action_extra}) {
4162                                 $action_print = $cgi->a({-href => href(action=>$action)},
4163                                         $action);
4164                         }
4165                         print " / $action_print";
4166                 }
4167                 if (defined $opts{-action_extra}) {
4168                         print " / $opts{-action_extra}";
4169                 }
4170                 print "\n";
4171         } elsif (defined $project_filter) {
4172                 print_nav_breadcrumbs_path(split '/', $project_filter);
4173         }
4174 }
4175
4176 sub print_search_form {
4177         if (!defined $searchtext) {
4178                 $searchtext = "";
4179         }
4180         my $search_hash;
4181         if (defined $hash_base) {
4182                 $search_hash = $hash_base;
4183         } elsif (defined $hash) {
4184                 $search_hash = $hash;
4185         } else {
4186                 $search_hash = "HEAD";
4187         }
4188         my $action = $my_uri;
4189         my $use_pathinfo = gitweb_check_feature('pathinfo');
4190         if ($use_pathinfo) {
4191                 $action .= "/".esc_url($project);
4192         }
4193         print $cgi->start_form(-method => "get", -action => $action) .
4194               "<div class=\"search\">\n" .
4195               (!$use_pathinfo &&
4196               $cgi->input({-name=>"p", -value=>$project, -type=>"hidden"}) . "\n") .
4197               $cgi->input({-name=>"a", -value=>"search", -type=>"hidden"}) . "\n" .
4198               $cgi->input({-name=>"h", -value=>$search_hash, -type=>"hidden"}) . "\n" .
4199               $cgi->popup_menu(-name => 'st', -default => 'commit',
4200                                -values => ['commit', 'grep', 'author', 'committer', 'pickaxe']) .
4201               " " . $cgi->a({-href => href(action=>"search_help"),
4202                              -title => "search help" }, "?") . " search:\n",
4203               $cgi->textfield(-name => "s", -value => $searchtext, -override => 1) . "\n" .
4204               "<span title=\"Extended regular expression\">" .
4205               $cgi->checkbox(-name => 'sr', -value => 1, -label => 're',
4206                              -checked => $search_use_regexp) .
4207               "</span>" .
4208               "</div>" .
4209               $cgi->end_form() . "\n";
4210 }
4211
4212 sub git_header_html {
4213         my $status = shift || "200 OK";
4214         my $expires = shift;
4215         my %opts = @_;
4216
4217         my $title = get_page_title();
4218         my $content_type = get_content_type_html();
4219         print $cgi->header(-type=>$content_type, -charset => 'utf-8',
4220                            -status=> $status, -expires => $expires)
4221                 unless ($opts{'-no_http_header'});
4222         my $mod_perl_version = $ENV{'MOD_PERL'} ? " $ENV{'MOD_PERL'}" : '';
4223         print <<EOF;
4224 <?xml version="1.0" encoding="utf-8"?>
4225 <!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Strict//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-strict.dtd">
4226 <html xmlns="http://www.w3.org/1999/xhtml" xml:lang="en-US" lang="en-US">
4227 <!-- git web interface version $version, (C) 2005-2006, Kay Sievers <kay.sievers\@vrfy.org>, Christian Gierke -->
4228 <!-- git core binaries version $git_version -->
4229 <head>
4230 <meta http-equiv="content-type" content="$content_type; charset=utf-8"/>
4231 <meta name="generator" content="gitweb/$version git/$git_version$mod_perl_version"/>
4232 <meta name="robots" content="index, nofollow"/>
4233 <title>$title</title>
4234 EOF
4235         # the stylesheet, favicon etc urls won't work correctly with path_info
4236         # unless we set the appropriate base URL
4237         if ($ENV{'PATH_INFO'}) {
4238                 print "<base href=\"".esc_url($base_url)."\" />\n";
4239         }
4240         print_header_links($status);
4241
4242         if (defined $site_html_head_string) {
4243                 print to_utf8($site_html_head_string);
4244         }
4245
4246         print "</head>\n" .
4247               "<body>\n";
4248
4249         if (defined $site_header && -f $site_header) {
4250                 insert_file($site_header);
4251         }
4252
4253         print "<div class=\"page_header\">\n";
4254         if (defined $logo) {
4255                 print $cgi->a({-href => esc_url($logo_url),
4256                                -title => $logo_label},
4257                               $cgi->img({-src => esc_url($logo),
4258                                          -width => 72, -height => 27,
4259                                          -alt => "git",
4260                                          -class => "logo"}));
4261         }
4262         print_nav_breadcrumbs(%opts);
4263         print "</div>\n";
4264
4265         my $have_search = gitweb_check_feature('search');
4266         if (defined $project && $have_search) {
4267                 print_search_form();
4268         }
4269 }
4270
4271 sub git_footer_html {
4272         my $feed_class = 'rss_logo';
4273
4274         print "<div class=\"page_footer\">\n";
4275         if (defined $project) {
4276                 my $descr = git_get_project_description($project);
4277                 if (defined $descr) {
4278                         print "<div class=\"page_footer_text\">" . esc_html($descr) . "</div>\n";
4279                 }
4280
4281                 my %href_params = get_feed_info();
4282                 if (!%href_params) {
4283                         $feed_class .= ' generic';
4284                 }
4285                 $href_params{'-title'} ||= 'log';
4286
4287                 foreach my $format (qw(RSS Atom)) {
4288                         $href_params{'action'} = lc($format);
4289                         print $cgi->a({-href => href(%href_params),
4290                                       -title => "$href_params{'-title'} $format feed",
4291                                       -class => $feed_class}, $format)."\n";
4292                 }
4293
4294         } else {
4295                 print $cgi->a({-href => href(project=>undef, action=>"opml",
4296                                              project_filter => $project_filter),
4297                               -class => $feed_class}, "OPML") . " ";
4298                 print $cgi->a({-href => href(project=>undef, action=>"project_index",
4299                                              project_filter => $project_filter),
4300                               -class => $feed_class}, "TXT") . "\n";
4301         }
4302         print "</div>\n"; # class="page_footer"
4303
4304         if (defined $t0 && gitweb_check_feature('timed')) {
4305                 print "<div id=\"generating_info\">\n";
4306                 print 'This page took '.
4307                       '<span id="generating_time" class="time_span">'.
4308                       tv_interval($t0, [ gettimeofday() ]).
4309                       ' seconds </span>'.
4310                       ' and '.
4311                       '<span id="generating_cmd">'.
4312                       $number_of_git_cmds.
4313                       '</span> git commands '.
4314                       " to generate.\n";
4315                 print "</div>\n"; # class="page_footer"
4316         }
4317
4318         if (defined $site_footer && -f $site_footer) {
4319                 insert_file($site_footer);
4320         }
4321
4322         print qq!<script type="text/javascript" src="!.esc_url($javascript).qq!"></script>\n!;
4323         if (defined $action &&
4324             $action eq 'blame_incremental') {
4325                 print qq!<script type="text/javascript">\n!.
4326                       qq!startBlame("!. href(action=>"blame_data", -replay=>1) .qq!",\n!.
4327                       qq!           "!. href() .qq!");\n!.
4328                       qq!</script>\n!;
4329         } else {
4330                 my ($jstimezone, $tz_cookie, $datetime_class) =
4331                         gitweb_get_feature('javascript-timezone');
4332
4333                 print qq!<script type="text/javascript">\n!.
4334                       qq!window.onload = function () {\n!;
4335                 if (gitweb_check_feature('javascript-actions')) {
4336                         print qq!       fixLinks();\n!;
4337                 }
4338                 if ($jstimezone && $tz_cookie && $datetime_class) {
4339                         print qq!       var tz_cookie = { name: '$tz_cookie', expires: 14, path: '/' };\n!. # in days
4340                               qq!       onloadTZSetup('$jstimezone', tz_cookie, '$datetime_class');\n!;
4341                 }
4342                 print qq!};\n!.
4343                       qq!</script>\n!;
4344         }
4345
4346         print "</body>\n" .
4347               "</html>";
4348 }
4349
4350 # die_error(<http_status_code>, <error_message>[, <detailed_html_description>])
4351 # Example: die_error(404, 'Hash not found')
4352 # By convention, use the following status codes (as defined in RFC 2616):
4353 # 400: Invalid or missing CGI parameters, or
4354 #      requested object exists but has wrong type.
4355 # 403: Requested feature (like "pickaxe" or "snapshot") not enabled on
4356 #      this server or project.
4357 # 404: Requested object/revision/project doesn't exist.
4358 # 500: The server isn't configured properly, or
4359 #      an internal error occurred (e.g. failed assertions caused by bugs), or
4360 #      an unknown error occurred (e.g. the git binary died unexpectedly).
4361 # 503: The server is currently unavailable (because it is overloaded,
4362 #      or down for maintenance).  Generally, this is a temporary state.
4363 sub die_error {
4364         my $status = shift || 500;
4365         my $error = esc_html(shift) || "Internal Server Error";
4366         my $extra = shift;
4367         my %opts = @_;
4368
4369         my %http_responses = (
4370                 400 => '400 Bad Request',
4371                 403 => '403 Forbidden',
4372                 404 => '404 Not Found',
4373                 500 => '500 Internal Server Error',
4374                 503 => '503 Service Unavailable',
4375         );
4376         git_header_html($http_responses{$status}, undef, %opts);
4377         print <<EOF;
4378 <div class="page_body">
4379 <br /><br />
4380 $status - $error
4381 <br />
4382 EOF
4383         if (defined $extra) {
4384                 print "<hr />\n" .
4385                       "$extra\n";
4386         }
4387         print "</div>\n";
4388
4389         git_footer_html();
4390         CORE::die
4391                 unless ($opts{'-error_handler'});
4392 }
4393
4394 ## ----------------------------------------------------------------------
4395 ## functions printing or outputting HTML: navigation
4396
4397 sub git_print_page_nav {
4398         my ($current, $suppress, $head, $treehead, $treebase, $extra) = @_;
4399         $extra = '' if !defined $extra; # pager or formats
4400
4401         my @navs = qw(summary shortlog log commit commitdiff tree);
4402         if ($suppress) {
4403                 @navs = grep { $_ ne $suppress } @navs;
4404         }
4405
4406         my %arg = map { $_ => {action=>$_} } @navs;
4407         if (defined $head) {
4408                 for (qw(commit commitdiff)) {
4409                         $arg{$_}{'hash'} = $head;
4410                 }
4411                 if ($current =~ m/^(tree | log | shortlog | commit | commitdiff | search)$/x) {
4412                         for (qw(shortlog log)) {
4413                                 $arg{$_}{'hash'} = $head;
4414                         }
4415                 }
4416         }
4417
4418         $arg{'tree'}{'hash'} = $treehead if defined $treehead;
4419         $arg{'tree'}{'hash_base'} = $treebase if defined $treebase;
4420
4421         my @actions = gitweb_get_feature('actions');
4422         my %repl = (
4423                 '%' => '%',
4424                 'n' => $project,         # project name
4425                 'f' => $git_dir,         # project path within filesystem
4426                 'h' => $treehead || '',  # current hash ('h' parameter)
4427                 'b' => $treebase || '',  # hash base ('hb' parameter)
4428         );
4429         while (@actions) {
4430                 my ($label, $link, $pos) = splice(@actions,0,3);
4431                 # insert
4432                 @navs = map { $_ eq $pos ? ($_, $label) : $_ } @navs;
4433                 # munch munch
4434                 $link =~ s/%([%nfhb])/$repl{$1}/g;
4435                 $arg{$label}{'_href'} = $link;
4436         }
4437
4438         print "<div class=\"page_nav\">\n" .
4439                 (join " | ",
4440                  map { $_ eq $current ?
4441                        $_ : $cgi->a({-href => ($arg{$_}{_href} ? $arg{$_}{_href} : href(%{$arg{$_}}))}, "$_")
4442                  } @navs);
4443         print "<br/>\n$extra<br/>\n" .
4444               "</div>\n";
4445 }
4446
4447 # returns a submenu for the nagivation of the refs views (tags, heads,
4448 # remotes) with the current view disabled and the remotes view only
4449 # available if the feature is enabled
4450 sub format_ref_views {
4451         my ($current) = @_;
4452         my @ref_views = qw{tags heads};
4453         push @ref_views, 'remotes' if gitweb_check_feature('remote_heads');
4454         return join " | ", map {
4455                 $_ eq $current ? $_ :
4456                 $cgi->a({-href => href(action=>$_)}, $_)
4457         } @ref_views
4458 }
4459
4460 sub format_paging_nav {
4461         my ($action, $page, $has_next_link) = @_;
4462         my $paging_nav;
4463
4464
4465         if ($page > 0) {
4466                 $paging_nav .=
4467                         $cgi->a({-href => href(-replay=>1, page=>undef)}, "first") .
4468                         " &sdot; " .
4469                         $cgi->a({-href => href(-replay=>1, page=>$page-1),
4470                                  -accesskey => "p", -title => "Alt-p"}, "prev");
4471         } else {
4472                 $paging_nav .= "first &sdot; prev";
4473         }
4474
4475         if ($has_next_link) {
4476                 $paging_nav .= " &sdot; " .
4477                         $cgi->a({-href => href(-replay=>1, page=>$page+1),
4478                                  -accesskey => "n", -title => "Alt-n"}, "next");
4479         } else {
4480                 $paging_nav .= " &sdot; next";
4481         }
4482
4483         return $paging_nav;
4484 }
4485
4486 ## ......................................................................
4487 ## functions printing or outputting HTML: div
4488
4489 sub git_print_header_div {
4490         my ($action, $title, $hash, $hash_base) = @_;
4491         my %args = ();
4492
4493         $args{'action'} = $action;
4494         $args{'hash'} = $hash if $hash;
4495         $args{'hash_base'} = $hash_base if $hash_base;
4496
4497         print "<div class=\"header\">\n" .
4498               $cgi->a({-href => href(%args), -class => "title"},
4499               $title ? $title : $action) .
4500               "\n</div>\n";
4501 }
4502
4503 sub format_repo_url {
4504         my ($name, $url) = @_;
4505         return "<tr class=\"metadata_url\"><td>$name</td><td>$url</td></tr>\n";
4506 }
4507
4508 # Group output by placing it in a DIV element and adding a header.
4509 # Options for start_div() can be provided by passing a hash reference as the
4510 # first parameter to the function.
4511 # Options to git_print_header_div() can be provided by passing an array
4512 # reference. This must follow the options to start_div if they are present.
4513 # The content can be a scalar, which is output as-is, a scalar reference, which
4514 # is output after html escaping, an IO handle passed either as *handle or
4515 # *handle{IO}, or a function reference. In the latter case all following
4516 # parameters will be taken as argument to the content function call.
4517 sub git_print_section {
4518         my ($div_args, $header_args, $content);
4519         my $arg = shift;
4520         if (ref($arg) eq 'HASH') {
4521                 $div_args = $arg;
4522                 $arg = shift;
4523         }
4524         if (ref($arg) eq 'ARRAY') {
4525                 $header_args = $arg;
4526                 $arg = shift;
4527         }
4528         $content = $arg;
4529
4530         print $cgi->start_div($div_args);
4531         git_print_header_div(@$header_args);
4532
4533         if (ref($content) eq 'CODE') {
4534                 $content->(@_);
4535         } elsif (ref($content) eq 'SCALAR') {
4536                 print esc_html($$content);
4537         } elsif (ref($content) eq 'GLOB' or ref($content) eq 'IO::Handle') {
4538                 print <$content>;
4539         } elsif (!ref($content) && defined($content)) {
4540                 print $content;
4541         }
4542
4543         print $cgi->end_div;
4544 }
4545
4546 sub format_timestamp_html {
4547         my $date = shift;
4548         my $strtime = $date->{'rfc2822'};
4549
4550         my (undef, undef, $datetime_class) =
4551                 gitweb_get_feature('javascript-timezone');
4552         if ($datetime_class) {
4553                 $strtime = qq!<span class="$datetime_class">$strtime</span>!;
4554         }
4555
4556         my $localtime_format = '(%02d:%02d %s)';
4557         if ($date->{'hour_local'} < 6) {
4558                 $localtime_format = '(<span class="atnight">%02d:%02d</span> %s)';
4559         }
4560         $strtime .= ' ' .
4561                     sprintf($localtime_format,
4562                             $date->{'hour_local'}, $date->{'minute_local'}, $date->{'tz_local'});
4563
4564         return $strtime;
4565 }
4566
4567 # Outputs the author name and date in long form
4568 sub git_print_authorship {
4569         my $co = shift;
4570         my %opts = @_;
4571         my $tag = $opts{-tag} || 'div';
4572         my $author = $co->{'author_name'};
4573
4574         my %ad = parse_date($co->{'author_epoch'}, $co->{'author_tz'});
4575         print "<$tag class=\"author_date\">" .
4576               format_search_author($author, "author", esc_html($author)) .
4577               " [".format_timestamp_html(\%ad)."]".
4578               git_get_avatar($co->{'author_email'}, -pad_before => 1) .
4579               "</$tag>\n";
4580 }
4581
4582 # Outputs table rows containing the full author or committer information,
4583 # in the format expected for 'commit' view (& similar).
4584 # Parameters are a commit hash reference, followed by the list of people
4585 # to output information for. If the list is empty it defaults to both
4586 # author and committer.
4587 sub git_print_authorship_rows {
4588         my $co = shift;
4589         # too bad we can't use @people = @_ || ('author', 'committer')
4590         my @people = @_;
4591         @people = ('author', 'committer') unless @people;
4592         foreach my $who (@people) {
4593                 my %wd = parse_date($co->{"${who}_epoch"}, $co->{"${who}_tz"});
4594                 print "<tr><td>$who</td><td>" .
4595                       format_search_author($co->{"${who}_name"}, $who,
4596                                            esc_html($co->{"${who}_name"})) . " " .
4597                       format_search_author($co->{"${who}_email"}, $who,
4598                                            esc_html("<" . $co->{"${who}_email"} . ">")) .
4599                       "</td><td rowspan=\"2\">" .
4600                       git_get_avatar($co->{"${who}_email"}, -size => 'double') .
4601                       "</td></tr>\n" .
4602                       "<tr>" .
4603                       "<td></td><td>" .
4604                       format_timestamp_html(\%wd) .
4605                       "</td>" .
4606                       "</tr>\n";
4607         }
4608 }
4609
4610 sub git_print_page_path {
4611         my $name = shift;
4612         my $type = shift;
4613         my $hb = shift;
4614
4615
4616         print "<div class=\"page_path\">";
4617         print $cgi->a({-href => href(action=>"tree", hash_base=>$hb),
4618                       -title => 'tree root'}, to_utf8("[$project]"));
4619         print " / ";
4620         if (defined $name) {
4621                 my @dirname = split '/', $name;
4622                 my $basename = pop @dirname;
4623                 my $fullname = '';
4624
4625                 foreach my $dir (@dirname) {
4626                         $fullname .= ($fullname ? '/' : '') . $dir;
4627                         print $cgi->a({-href => href(action=>"tree", file_name=>$fullname,
4628                                                      hash_base=>$hb),
4629                                       -title => $fullname}, esc_path($dir));
4630                         print " / ";
4631                 }
4632                 if (defined $type && $type eq 'blob') {
4633                         print $cgi->a({-href => href(action=>"blob_plain", file_name=>$file_name,
4634                                                      hash_base=>$hb),
4635                                       -title => $name}, esc_path($basename));
4636                 } elsif (defined $type && $type eq 'tree') {
4637                         print $cgi->a({-href => href(action=>"tree", file_name=>$file_name,
4638                                                      hash_base=>$hb),
4639                                       -title => $name}, esc_path($basename));
4640                         print " / ";
4641                 } else {
4642                         print esc_path($basename);
4643                 }
4644         }
4645         print "<br/></div>\n";
4646 }
4647
4648 sub git_print_log {
4649         my $log = shift;
4650         my %opts = @_;
4651
4652         if ($opts{'-remove_title'}) {
4653                 # remove title, i.e. first line of log
4654                 shift @$log;
4655         }
4656         # remove leading empty lines
4657         while (defined $log->[0] && $log->[0] eq "") {
4658                 shift @$log;
4659         }
4660
4661         # print log
4662         my $skip_blank_line = 0;
4663         foreach my $line (@$log) {
4664                 if ($line =~ m/^\s*([A-Z][-A-Za-z]*-[Bb]y|C[Cc]): /) {
4665                         if (! $opts{'-remove_signoff'}) {
4666                                 print "<span class=\"signoff\">" . esc_html($line) . "</span><br/>\n";
4667                                 $skip_blank_line = 1;
4668                         }
4669                         next;
4670                 }
4671
4672                 if ($line =~ m,\s*([a-z]*link): (https?://\S+),i) {
4673                         if (! $opts{'-remove_signoff'}) {
4674                                 print "<span class=\"signoff\">" . esc_html($1) . ": " .
4675                                         "<a href=\"" . esc_html($2) . "\">" . esc_html($2) . "</a>" .
4676                                         "</span><br/>\n";
4677                                 $skip_blank_line = 1;
4678                         }
4679                         next;
4680                 }
4681
4682                 # print only one empty line
4683                 # do not print empty line after signoff
4684                 if ($line eq "") {
4685                         next if ($skip_blank_line);
4686                         $skip_blank_line = 1;
4687                 } else {
4688                         $skip_blank_line = 0;
4689                 }
4690
4691                 print format_log_line_html($line) . "<br/>\n";
4692         }
4693
4694         if ($opts{'-final_empty_line'}) {
4695                 # end with single empty line
4696                 print "<br/>\n" unless $skip_blank_line;
4697         }
4698 }
4699
4700 # return link target (what link points to)
4701 sub git_get_link_target {
4702         my $hash = shift;
4703         my $link_target;
4704
4705         # read link
4706         open my $fd, "-|", git_cmd(), "cat-file", "blob", $hash
4707                 or return;
4708         {
4709                 local $/ = undef;
4710                 $link_target = <$fd>;
4711         }
4712         close $fd
4713                 or return;
4714
4715         return $link_target;
4716 }
4717
4718 # given link target, and the directory (basedir) the link is in,
4719 # return target of link relative to top directory (top tree);
4720 # return undef if it is not possible (including absolute links).
4721 sub normalize_link_target {
4722         my ($link_target, $basedir) = @_;
4723
4724         # absolute symlinks (beginning with '/') cannot be normalized
4725         return if (substr($link_target, 0, 1) eq '/');
4726
4727         # normalize link target to path from top (root) tree (dir)
4728         my $path;
4729         if ($basedir) {
4730                 $path = $basedir . '/' . $link_target;
4731         } else {
4732                 # we are in top (root) tree (dir)
4733                 $path = $link_target;
4734         }
4735
4736         # remove //, /./, and /../
4737         my @path_parts;
4738         foreach my $part (split('/', $path)) {
4739                 # discard '.' and ''
4740                 next if (!$part || $part eq '.');
4741                 # handle '..'
4742                 if ($part eq '..') {
4743                         if (@path_parts) {
4744                                 pop @path_parts;
4745                         } else {
4746                                 # link leads outside repository (outside top dir)
4747                                 return;
4748                         }
4749                 } else {
4750                         push @path_parts, $part;
4751                 }
4752         }
4753         $path = join('/', @path_parts);
4754
4755         return $path;
4756 }
4757
4758 # print tree entry (row of git_tree), but without encompassing <tr> element
4759 sub git_print_tree_entry {
4760         my ($t, $basedir, $hash_base, $have_blame) = @_;
4761
4762         my %base_key = ();
4763         $base_key{'hash_base'} = $hash_base if defined $hash_base;
4764
4765         # The format of a table row is: mode list link.  Where mode is
4766         # the mode of the entry, list is the name of the entry, an href,
4767         # and link is the action links of the entry.
4768
4769         print "<td class=\"mode\">" . mode_str($t->{'mode'}) . "</td>\n";
4770         if (exists $t->{'size'}) {
4771                 print "<td class=\"size\">$t->{'size'}</td>\n";
4772         }
4773         if ($t->{'type'} eq "blob") {
4774                 print "<td class=\"list\">" .
4775                         $cgi->a({-href => href(action=>"blob", hash=>$t->{'hash'},
4776                                                file_name=>"$basedir$t->{'name'}", %base_key),
4777                                 -class => "list"}, esc_path($t->{'name'}));
4778                 if (S_ISLNK(oct $t->{'mode'})) {
4779                         my $link_target = git_get_link_target($t->{'hash'});
4780                         if ($link_target) {
4781                                 my $norm_target = normalize_link_target($link_target, $basedir);
4782                                 if (defined $norm_target) {
4783                                         print " -> " .
4784                                               $cgi->a({-href => href(action=>"object", hash_base=>$hash_base,
4785                                                                      file_name=>$norm_target),
4786                                                        -title => $norm_target}, esc_path($link_target));
4787                                 } else {
4788                                         print " -> " . esc_path($link_target);
4789                                 }
4790                         }
4791                 }
4792                 print "</td>\n";
4793                 print "<td class=\"link\">";
4794                 print $cgi->a({-href => href(action=>"blob", hash=>$t->{'hash'},
4795                                              file_name=>"$basedir$t->{'name'}", %base_key)},
4796                               "blob");
4797                 if ($have_blame) {
4798                         print " | " .
4799                               $cgi->a({-href => href(action=>"blame", hash=>$t->{'hash'},
4800                                                      file_name=>"$basedir$t->{'name'}", %base_key)},
4801                                       "blame");
4802                 }
4803                 if (defined $hash_base) {
4804                         print " | " .
4805                               $cgi->a({-href => href(action=>"history", hash_base=>$hash_base,
4806                                                      hash=>$t->{'hash'}, file_name=>"$basedir$t->{'name'}")},
4807                                       "history");
4808                 }
4809                 print " | " .
4810                         $cgi->a({-href => href(action=>"blob_plain", hash_base=>$hash_base,
4811                                                file_name=>"$basedir$t->{'name'}")},
4812                                 "raw");
4813                 print "</td>\n";
4814
4815         } elsif ($t->{'type'} eq "tree") {
4816                 print "<td class=\"list\">";
4817                 print $cgi->a({-href => href(action=>"tree", hash=>$t->{'hash'},
4818                                              file_name=>"$basedir$t->{'name'}",
4819                                              %base_key)},
4820                               esc_path($t->{'name'}));
4821                 print "</td>\n";
4822                 print "<td class=\"link\">";
4823                 print $cgi->a({-href => href(action=>"tree", hash=>$t->{'hash'},
4824                                              file_name=>"$basedir$t->{'name'}",
4825                                              %base_key)},
4826                               "tree");
4827                 if (defined $hash_base) {
4828                         print " | " .
4829                               $cgi->a({-href => href(action=>"history", hash_base=>$hash_base,
4830                                                      file_name=>"$basedir$t->{'name'}")},
4831                                       "history");
4832                 }
4833                 print "</td>\n";
4834         } else {
4835                 # unknown object: we can only present history for it
4836                 # (this includes 'commit' object, i.e. submodule support)
4837                 print "<td class=\"list\">" .
4838                       esc_path($t->{'name'}) .
4839                       "</td>\n";
4840                 print "<td class=\"link\">";
4841                 if (defined $hash_base) {
4842                         print $cgi->a({-href => href(action=>"history",
4843                                                      hash_base=>$hash_base,
4844                                                      file_name=>"$basedir$t->{'name'}")},
4845                                       "history");
4846                 }
4847                 print "</td>\n";
4848         }
4849 }
4850
4851 ## ......................................................................
4852 ## functions printing large fragments of HTML
4853
4854 # get pre-image filenames for merge (combined) diff
4855 sub fill_from_file_info {
4856         my ($diff, @parents) = @_;
4857
4858         $diff->{'from_file'} = [ ];
4859         $diff->{'from_file'}[$diff->{'nparents'} - 1] = undef;
4860         for (my $i = 0; $i < $diff->{'nparents'}; $i++) {
4861                 if ($diff->{'status'}[$i] eq 'R' ||
4862                     $diff->{'status'}[$i] eq 'C') {
4863                         $diff->{'from_file'}[$i] =
4864                                 git_get_path_by_hash($parents[$i], $diff->{'from_id'}[$i]);
4865                 }
4866         }
4867
4868         return $diff;
4869 }
4870
4871 # is current raw difftree line of file deletion
4872 sub is_deleted {
4873         my $diffinfo = shift;
4874
4875         return $diffinfo->{'to_id'} eq ('0' x 40);
4876 }
4877
4878 # does patch correspond to [previous] difftree raw line
4879 # $diffinfo  - hashref of parsed raw diff format
4880 # $patchinfo - hashref of parsed patch diff format
4881 #              (the same keys as in $diffinfo)
4882 sub is_patch_split {
4883         my ($diffinfo, $patchinfo) = @_;
4884
4885         return defined $diffinfo && defined $patchinfo
4886                 && $diffinfo->{'to_file'} eq $patchinfo->{'to_file'};
4887 }
4888
4889
4890 sub git_difftree_body {
4891         my ($difftree, $hash, @parents) = @_;
4892         my ($parent) = $parents[0];
4893         my $have_blame = gitweb_check_feature('blame');
4894         print "<div class=\"list_head\">\n";
4895         if ($#{$difftree} > 10) {
4896                 print(($#{$difftree} + 1) . " files changed:\n");
4897         }
4898         print "</div>\n";
4899
4900         print "<table class=\"" .
4901               (@parents > 1 ? "combined " : "") .
4902               "diff_tree\">\n";
4903
4904         # header only for combined diff in 'commitdiff' view
4905         my $has_header = @$difftree && @parents > 1 && $action eq 'commitdiff';
4906         if ($has_header) {
4907                 # table header
4908                 print "<thead><tr>\n" .
4909                        "<th></th><th></th>\n"; # filename, patchN link
4910                 for (my $i = 0; $i < @parents; $i++) {
4911                         my $par = $parents[$i];
4912                         print "<th>" .
4913                               $cgi->a({-href => href(action=>"commitdiff",
4914                                                      hash=>$hash, hash_parent=>$par),
4915                                        -title => 'commitdiff to parent number ' .
4916                                                   ($i+1) . ': ' . substr($par,0,7)},
4917                                       $i+1) .
4918                               "&nbsp;</th>\n";
4919                 }
4920                 print "</tr></thead>\n<tbody>\n";
4921         }
4922
4923         my $alternate = 1;
4924         my $patchno = 0;
4925         foreach my $line (@{$difftree}) {
4926                 my $diff = parsed_difftree_line($line);
4927
4928                 if ($alternate) {
4929                         print "<tr class=\"dark\">\n";
4930                 } else {
4931                         print "<tr class=\"light\">\n";
4932                 }
4933                 $alternate ^= 1;
4934
4935                 if (exists $diff->{'nparents'}) { # combined diff
4936
4937                         fill_from_file_info($diff, @parents)
4938                                 unless exists $diff->{'from_file'};
4939
4940                         if (!is_deleted($diff)) {
4941                                 # file exists in the result (child) commit
4942                                 print "<td>" .
4943                                       $cgi->a({-href => href(action=>"blob", hash=>$diff->{'to_id'},
4944                                                              file_name=>$diff->{'to_file'},
4945                                                              hash_base=>$hash),
4946                                               -class => "list"}, esc_path($diff->{'to_file'})) .
4947                                       "</td>\n";
4948                         } else {
4949                                 print "<td>" .
4950                                       esc_path($diff->{'to_file'}) .
4951                                       "</td>\n";
4952                         }
4953
4954                         if ($action eq 'commitdiff') {
4955                                 # link to patch
4956                                 $patchno++;
4957                                 print "<td class=\"link\">" .
4958                                       $cgi->a({-href => href(-anchor=>"patch$patchno")},
4959                                               "patch") .
4960                                       " | " .
4961                                       "</td>\n";
4962                         }
4963
4964                         my $has_history = 0;
4965                         my $not_deleted = 0;
4966                         for (my $i = 0; $i < $diff->{'nparents'}; $i++) {
4967                                 my $hash_parent = $parents[$i];
4968                                 my $from_hash = $diff->{'from_id'}[$i];
4969                                 my $from_path = $diff->{'from_file'}[$i];
4970                                 my $status = $diff->{'status'}[$i];
4971
4972                                 $has_history ||= ($status ne 'A');
4973                                 $not_deleted ||= ($status ne 'D');
4974
4975                                 if ($status eq 'A') {
4976                                         print "<td  class=\"link\" align=\"right\"> | </td>\n";
4977                                 } elsif ($status eq 'D') {
4978                                         print "<td class=\"link\">" .
4979                                               $cgi->a({-href => href(action=>"blob",
4980                                                                      hash_base=>$hash,
4981                                                                      hash=>$from_hash,
4982                                                                      file_name=>$from_path)},
4983                                                       "blob" . ($i+1)) .
4984                                               " | </td>\n";
4985                                 } else {
4986                                         if ($diff->{'to_id'} eq $from_hash) {
4987                                                 print "<td class=\"link nochange\">";
4988                                         } else {
4989                                                 print "<td class=\"link\">";
4990                                         }
4991                                         print $cgi->a({-href => href(action=>"blobdiff",
4992                                                                      hash=>$diff->{'to_id'},
4993                                                                      hash_parent=>$from_hash,
4994                                                                      hash_base=>$hash,
4995                                                                      hash_parent_base=>$hash_parent,
4996                                                                      file_name=>$diff->{'to_file'},
4997                                                                      file_parent=>$from_path)},
4998                                                       "diff" . ($i+1)) .
4999                                               " | </td>\n";
5000                                 }
5001                         }
5002
5003                         print "<td class=\"link\">";
5004                         if ($not_deleted) {
5005                                 print $cgi->a({-href => href(action=>"blob",
5006                                                              hash=>$diff->{'to_id'},
5007                                                              file_name=>$diff->{'to_file'},
5008                                                              hash_base=>$hash)},
5009                                               "blob");
5010                                 print " | " if ($has_history);
5011                         }
5012                         if ($has_history) {
5013                                 print $cgi->a({-href => href(action=>"history",
5014                                                              file_name=>$diff->{'to_file'},
5015                                                              hash_base=>$hash)},
5016                                               "history");
5017                         }
5018                         print "</td>\n";
5019
5020                         print "</tr>\n";
5021                         next; # instead of 'else' clause, to avoid extra indent
5022                 }
5023                 # else ordinary diff
5024
5025                 my ($to_mode_oct, $to_mode_str, $to_file_type);
5026                 my ($from_mode_oct, $from_mode_str, $from_file_type);
5027                 if ($diff->{'to_mode'} ne ('0' x 6)) {
5028                         $to_mode_oct = oct $diff->{'to_mode'};
5029                         if (S_ISREG($to_mode_oct)) { # only for regular file
5030                                 $to_mode_str = sprintf("%04o", $to_mode_oct & 0777); # permission bits
5031                         }
5032                         $to_file_type = file_type($diff->{'to_mode'});
5033                 }
5034                 if ($diff->{'from_mode'} ne ('0' x 6)) {
5035                         $from_mode_oct = oct $diff->{'from_mode'};
5036                         if (S_ISREG($from_mode_oct)) { # only for regular file
5037                                 $from_mode_str = sprintf("%04o", $from_mode_oct & 0777); # permission bits
5038                         }
5039                         $from_file_type = file_type($diff->{'from_mode'});
5040                 }
5041
5042                 if ($diff->{'status'} eq "A") { # created
5043                         my $mode_chng = "<span class=\"file_status new\">[new $to_file_type";
5044                         $mode_chng   .= " with mode: $to_mode_str" if $to_mode_str;
5045                         $mode_chng   .= "]</span>";
5046                         print "<td>";
5047                         print $cgi->a({-href => href(action=>"blob", hash=>$diff->{'to_id'},
5048                                                      hash_base=>$hash, file_name=>$diff->{'file'}),
5049                                       -class => "list"}, esc_path($diff->{'file'}));
5050                         print "</td>\n";
5051                         print "<td>$mode_chng</td>\n";
5052                         print "<td class=\"link\">";
5053                         if ($action eq 'commitdiff') {
5054                                 # link to patch
5055                                 $patchno++;
5056                                 print $cgi->a({-href => href(-anchor=>"patch$patchno")},
5057                                               "patch") .
5058                                       " | ";
5059                         }
5060                         print $cgi->a({-href => href(action=>"blob", hash=>$diff->{'to_id'},
5061                                                      hash_base=>$hash, file_name=>$diff->{'file'})},
5062                                       "blob");
5063                         print "</td>\n";
5064
5065                 } elsif ($diff->{'status'} eq "D") { # deleted
5066                         my $mode_chng = "<span class=\"file_status deleted\">[deleted $from_file_type]</span>";
5067                         print "<td>";
5068                         print $cgi->a({-href => href(action=>"blob", hash=>$diff->{'from_id'},
5069                                                      hash_base=>$parent, file_name=>$diff->{'file'}),
5070                                        -class => "list"}, esc_path($diff->{'file'}));
5071                         print "</td>\n";
5072                         print "<td>$mode_chng</td>\n";
5073                         print "<td class=\"link\">";
5074                         if ($action eq 'commitdiff') {
5075                                 # link to patch
5076                                 $patchno++;
5077                                 print $cgi->a({-href => href(-anchor=>"patch$patchno")},
5078                                               "patch") .
5079                                       " | ";
5080                         }
5081                         print $cgi->a({-href => href(action=>"blob", hash=>$diff->{'from_id'},
5082                                                      hash_base=>$parent, file_name=>$diff->{'file'})},
5083                                       "blob") . " | ";
5084                         if ($have_blame) {
5085                                 print $cgi->a({-href => href(action=>"blame", hash_base=>$parent,
5086                                                              file_name=>$diff->{'file'})},
5087                                               "blame") . " | ";
5088                         }
5089                         print $cgi->a({-href => href(action=>"history", hash_base=>$parent,
5090                                                      file_name=>$diff->{'file'})},
5091                                       "history");
5092                         print "</td>\n";
5093
5094                 } elsif ($diff->{'status'} eq "M" || $diff->{'status'} eq "T") { # modified, or type changed
5095                         my $mode_chnge = "";
5096                         if ($diff->{'from_mode'} != $diff->{'to_mode'}) {
5097                                 $mode_chnge = "<span class=\"file_status mode_chnge\">[changed";
5098                                 if ($from_file_type ne $to_file_type) {
5099                                         $mode_chnge .= " from $from_file_type to $to_file_type";
5100                                 }
5101                                 if (($from_mode_oct & 0777) != ($to_mode_oct & 0777)) {
5102                                         if ($from_mode_str && $to_mode_str) {
5103                                                 $mode_chnge .= " mode: $from_mode_str->$to_mode_str";
5104                                         } elsif ($to_mode_str) {
5105                                                 $mode_chnge .= " mode: $to_mode_str";
5106                                         }
5107                                 }
5108                                 $mode_chnge .= "]</span>\n";
5109                         }
5110                         print "<td>";
5111                         print $cgi->a({-href => href(action=>"blob", hash=>$diff->{'to_id'},
5112                                                      hash_base=>$hash, file_name=>$diff->{'file'}),
5113                                       -class => "list"}, esc_path($diff->{'file'}));
5114                         print "</td>\n";
5115                         print "<td>$mode_chnge</td>\n";
5116                         print "<td class=\"link\">";
5117                         if ($action eq 'commitdiff') {
5118                                 # link to patch
5119                                 $patchno++;
5120                                 print $cgi->a({-href => href(-anchor=>"patch$patchno")},
5121                                               "patch") .
5122                                       " | ";
5123                         } elsif ($diff->{'to_id'} ne $diff->{'from_id'}) {
5124                                 # "commit" view and modified file (not onlu mode changed)
5125                                 print $cgi->a({-href => href(action=>"blobdiff",
5126                                                              hash=>$diff->{'to_id'}, hash_parent=>$diff->{'from_id'},
5127                                                              hash_base=>$hash, hash_parent_base=>$parent,
5128                                                              file_name=>$diff->{'file'})},
5129                                               "diff") .
5130                                       " | ";
5131                         }
5132                         print $cgi->a({-href => href(action=>"blob", hash=>$diff->{'to_id'},
5133                                                      hash_base=>$hash, file_name=>$diff->{'file'})},
5134                                        "blob") . " | ";
5135                         if ($have_blame) {
5136                                 print $cgi->a({-href => href(action=>"blame", hash_base=>$hash,
5137                                                              file_name=>$diff->{'file'})},
5138                                               "blame") . " | ";
5139                         }
5140                         print $cgi->a({-href => href(action=>"history", hash_base=>$hash,
5141                                                      file_name=>$diff->{'file'})},
5142                                       "history");
5143                         print "</td>\n";
5144
5145                 } elsif ($diff->{'status'} eq "R" || $diff->{'status'} eq "C") { # renamed or copied
5146                         my %status_name = ('R' => 'moved', 'C' => 'copied');
5147                         my $nstatus = $status_name{$diff->{'status'}};
5148                         my $mode_chng = "";
5149                         if ($diff->{'from_mode'} != $diff->{'to_mode'}) {
5150                                 # mode also for directories, so we cannot use $to_mode_str
5151                                 $mode_chng = sprintf(", mode: %04o", $to_mode_oct & 0777);
5152                         }
5153                         print "<td>" .
5154                               $cgi->a({-href => href(action=>"blob", hash_base=>$hash,
5155                                                      hash=>$diff->{'to_id'}, file_name=>$diff->{'to_file'}),
5156                                       -class => "list"}, esc_path($diff->{'to_file'})) . "</td>\n" .
5157                               "<td><span class=\"file_status $nstatus\">[$nstatus from " .
5158                               $cgi->a({-href => href(action=>"blob", hash_base=>$parent,
5159                                                      hash=>$diff->{'from_id'}, file_name=>$diff->{'from_file'}),
5160                                       -class => "list"}, esc_path($diff->{'from_file'})) .
5161                               " with " . (int $diff->{'similarity'}) . "% similarity$mode_chng]</span></td>\n" .
5162                               "<td class=\"link\">";
5163                         if ($action eq 'commitdiff') {
5164                                 # link to patch
5165                                 $patchno++;
5166                                 print $cgi->a({-href => href(-anchor=>"patch$patchno")},
5167                                               "patch") .
5168                                       " | ";
5169                         } elsif ($diff->{'to_id'} ne $diff->{'from_id'}) {
5170                                 # "commit" view and modified file (not only pure rename or copy)
5171                                 print $cgi->a({-href => href(action=>"blobdiff",
5172                                                              hash=>$diff->{'to_id'}, hash_parent=>$diff->{'from_id'},
5173                                                              hash_base=>$hash, hash_parent_base=>$parent,
5174                                                              file_name=>$diff->{'to_file'}, file_parent=>$diff->{'from_file'})},
5175                                               "diff") .
5176                                       " | ";
5177                         }
5178                         print $cgi->a({-href => href(action=>"blob", hash=>$diff->{'to_id'},
5179                                                      hash_base=>$parent, file_name=>$diff->{'to_file'})},
5180                                       "blob") . " | ";
5181                         if ($have_blame) {
5182                                 print $cgi->a({-href => href(action=>"blame", hash_base=>$hash,
5183                                                              file_name=>$diff->{'to_file'})},
5184                                               "blame") . " | ";
5185                         }
5186                         print $cgi->a({-href => href(action=>"history", hash_base=>$hash,
5187                                                     file_name=>$diff->{'to_file'})},
5188                                       "history");
5189                         print "</td>\n";
5190
5191                 } # we should not encounter Unmerged (U) or Unknown (X) status
5192                 print "</tr>\n";
5193         }
5194         print "</tbody>" if $has_header;
5195         print "</table>\n";
5196 }
5197
5198 # Print context lines and then rem/add lines in a side-by-side manner.
5199 sub print_sidebyside_diff_lines {
5200         my ($ctx, $rem, $add) = @_;
5201
5202         # print context block before add/rem block
5203         if (@$ctx) {
5204                 print join '',
5205                         '<div class="chunk_block ctx">',
5206                                 '<div class="old">',
5207                                 @$ctx,
5208                                 '</div>',
5209                                 '<div class="new">',
5210                                 @$ctx,
5211                                 '</div>',
5212                         '</div>';
5213         }
5214
5215         if (!@$add) {
5216                 # pure removal
5217                 print join '',
5218                         '<div class="chunk_block rem">',
5219                                 '<div class="old">',
5220                                 @$rem,
5221                                 '</div>',
5222                         '</div>';
5223         } elsif (!@$rem) {
5224                 # pure addition
5225                 print join '',
5226                         '<div class="chunk_block add">',
5227                                 '<div class="new">',
5228                                 @$add,
5229                                 '</div>',
5230                         '</div>';
5231         } else {
5232                 print join '',
5233                         '<div class="chunk_block chg">',
5234                                 '<div class="old">',
5235                                 @$rem,
5236                                 '</div>',
5237                                 '<div class="new">',
5238                                 @$add,
5239                                 '</div>',
5240                         '</div>';
5241         }
5242 }
5243
5244 # Print context lines and then rem/add lines in inline manner.
5245 sub print_inline_diff_lines {
5246         my ($ctx, $rem, $add) = @_;
5247
5248         print @$ctx, @$rem, @$add;
5249 }
5250
5251 # Format removed and added line, mark changed part and HTML-format them.
5252 # Implementation is based on contrib/diff-highlight
5253 sub format_rem_add_lines_pair {
5254         my ($rem, $add, $num_parents) = @_;
5255
5256         # We need to untabify lines before split()'ing them;
5257         # otherwise offsets would be invalid.
5258         chomp $rem;
5259         chomp $add;
5260         $rem = untabify($rem);
5261         $add = untabify($add);
5262
5263         my @rem = split(//, $rem);
5264         my @add = split(//, $add);
5265         my ($esc_rem, $esc_add);
5266         # Ignore leading +/- characters for each parent.
5267         my ($prefix_len, $suffix_len) = ($num_parents, 0);
5268         my ($prefix_has_nonspace, $suffix_has_nonspace);
5269
5270         my $shorter = (@rem < @add) ? @rem : @add;
5271         while ($prefix_len < $shorter) {
5272                 last if ($rem[$prefix_len] ne $add[$prefix_len]);
5273
5274                 $prefix_has_nonspace = 1 if ($rem[$prefix_len] !~ /\s/);
5275                 $prefix_len++;
5276         }
5277
5278         while ($prefix_len + $suffix_len < $shorter) {
5279                 last if ($rem[-1 - $suffix_len] ne $add[-1 - $suffix_len]);
5280
5281                 $suffix_has_nonspace = 1 if ($rem[-1 - $suffix_len] !~ /\s/);
5282                 $suffix_len++;
5283         }
5284
5285         # Mark lines that are different from each other, but have some common
5286         # part that isn't whitespace.  If lines are completely different, don't
5287         # mark them because that would make output unreadable, especially if
5288         # diff consists of multiple lines.
5289         if ($prefix_has_nonspace || $suffix_has_nonspace) {
5290                 $esc_rem = esc_html_hl_regions($rem, 'marked',
5291                         [$prefix_len, @rem - $suffix_len], -nbsp=>1);
5292                 $esc_add = esc_html_hl_regions($add, 'marked',
5293                         [$prefix_len, @add - $suffix_len], -nbsp=>1);
5294         } else {
5295                 $esc_rem = esc_html($rem, -nbsp=>1);
5296                 $esc_add = esc_html($add, -nbsp=>1);
5297         }
5298
5299         return format_diff_line(\$esc_rem, 'rem'),
5300                format_diff_line(\$esc_add, 'add');
5301 }
5302
5303 # HTML-format diff context, removed and added lines.
5304 sub format_ctx_rem_add_lines {
5305         my ($ctx, $rem, $add, $num_parents) = @_;
5306         my (@new_ctx, @new_rem, @new_add);
5307         my $can_highlight = 0;
5308         my $is_combined = ($num_parents > 1);
5309
5310         # Highlight if every removed line has a corresponding added line.
5311         if (@$add > 0 && @$add == @$rem) {
5312                 $can_highlight = 1;
5313
5314                 # Highlight lines in combined diff only if the chunk contains
5315                 # diff between the same version, e.g.
5316                 #
5317                 #    - a
5318                 #   -  b
5319                 #    + c
5320                 #   +  d
5321                 #
5322                 # Otherwise the highlightling would be confusing.
5323                 if ($is_combined) {
5324                         for (my $i = 0; $i < @$add; $i++) {
5325                                 my $prefix_rem = substr($rem->[$i], 0, $num_parents);
5326                                 my $prefix_add = substr($add->[$i], 0, $num_parents);
5327
5328                                 $prefix_rem =~ s/-/+/g;
5329
5330                                 if ($prefix_rem ne $prefix_add) {
5331                                         $can_highlight = 0;
5332                                         last;
5333                                 }
5334                         }
5335                 }
5336         }
5337
5338         if ($can_highlight) {
5339                 for (my $i = 0; $i < @$add; $i++) {
5340                         my ($line_rem, $line_add) = format_rem_add_lines_pair(
5341                                 $rem->[$i], $add->[$i], $num_parents);
5342                         push @new_rem, $line_rem;
5343                         push @new_add, $line_add;
5344                 }
5345         } else {
5346                 @new_rem = map { format_diff_line($_, 'rem') } @$rem;
5347                 @new_add = map { format_diff_line($_, 'add') } @$add;
5348         }
5349
5350         @new_ctx = map { format_diff_line($_, 'ctx') } @$ctx;
5351
5352         return (\@new_ctx, \@new_rem, \@new_add);
5353 }
5354
5355 # Print context lines and then rem/add lines.
5356 sub print_diff_lines {
5357         my ($ctx, $rem, $add, $diff_style, $num_parents) = @_;
5358         my $is_combined = $num_parents > 1;
5359
5360         ($ctx, $rem, $add) = format_ctx_rem_add_lines($ctx, $rem, $add,
5361                 $num_parents);
5362
5363         if ($diff_style eq 'sidebyside' && !$is_combined) {
5364                 print_sidebyside_diff_lines($ctx, $rem, $add);
5365         } else {
5366                 # default 'inline' style and unknown styles
5367                 print_inline_diff_lines($ctx, $rem, $add);
5368         }
5369 }
5370
5371 sub print_diff_chunk {
5372         my ($diff_style, $num_parents, $from, $to, @chunk) = @_;
5373         my (@ctx, @rem, @add);
5374
5375         # The class of the previous line.
5376         my $prev_class = '';
5377
5378         return unless @chunk;
5379
5380         # incomplete last line might be among removed or added lines,
5381         # or both, or among context lines: find which
5382         for (my $i = 1; $i < @chunk; $i++) {
5383                 if ($chunk[$i][0] eq 'incomplete') {
5384                         $chunk[$i][0] = $chunk[$i-1][0];
5385                 }
5386         }
5387
5388         # guardian
5389         push @chunk, ["", ""];
5390
5391         foreach my $line_info (@chunk) {
5392                 my ($class, $line) = @$line_info;
5393
5394                 # print chunk headers
5395                 if ($class && $class eq 'chunk_header') {
5396                         print format_diff_line($line, $class, $from, $to);
5397                         next;
5398                 }
5399
5400                 ## print from accumulator when have some add/rem lines or end
5401                 # of chunk (flush context lines), or when have add and rem
5402                 # lines and new block is reached (otherwise add/rem lines could
5403                 # be reordered)
5404                 if (!$class || ((@rem || @add) && $class eq 'ctx') ||
5405                     (@rem && @add && $class ne $prev_class)) {
5406                         print_diff_lines(\@ctx, \@rem, \@add,
5407                                          $diff_style, $num_parents);
5408                         @ctx = @rem = @add = ();
5409                 }
5410
5411                 ## adding lines to accumulator
5412                 # guardian value
5413                 last unless $line;
5414                 # rem, add or change
5415                 if ($class eq 'rem') {
5416                         push @rem, $line;
5417                 } elsif ($class eq 'add') {
5418                         push @add, $line;
5419                 }
5420                 # context line
5421                 if ($class eq 'ctx') {
5422                         push @ctx, $line;
5423                 }
5424
5425                 $prev_class = $class;
5426         }
5427 }
5428
5429 sub git_patchset_body {
5430         my ($fd, $diff_style, $difftree, $hash, @hash_parents) = @_;
5431         my ($hash_parent) = $hash_parents[0];
5432
5433         my $is_combined = (@hash_parents > 1);
5434         my $patch_idx = 0;
5435         my $patch_number = 0;
5436         my $patch_line;
5437         my $diffinfo;
5438         my $to_name;
5439         my (%from, %to);
5440         my @chunk; # for side-by-side diff
5441
5442         print "<div class=\"patchset\">\n";
5443
5444         # skip to first patch
5445         while ($patch_line = <$fd>) {
5446                 chomp $patch_line;
5447
5448                 last if ($patch_line =~ m/^diff /);
5449         }
5450
5451  PATCH:
5452         while ($patch_line) {
5453
5454                 # parse "git diff" header line
5455                 if ($patch_line =~ m/^diff --git (\"(?:[^\\\"]*(?:\\.[^\\\"]*)*)\"|[^ "]*) (.*)$/) {
5456                         # $1 is from_name, which we do not use
5457                         $to_name = unquote($2);
5458                         $to_name =~ s!^b/!!;
5459                 } elsif ($patch_line =~ m/^diff --(cc|combined) ("?.*"?)$/) {
5460                         # $1 is 'cc' or 'combined', which we do not use
5461                         $to_name = unquote($2);
5462                 } else {
5463                         $to_name = undef;
5464                 }
5465
5466                 # check if current patch belong to current raw line
5467                 # and parse raw git-diff line if needed
5468                 if (is_patch_split($diffinfo, { 'to_file' => $to_name })) {
5469                         # this is continuation of a split patch
5470                         print "<div class=\"patch cont\">\n";
5471                 } else {
5472                         # advance raw git-diff output if needed
5473                         $patch_idx++ if defined $diffinfo;
5474
5475                         # read and prepare patch information
5476                         $diffinfo = parsed_difftree_line($difftree->[$patch_idx]);
5477
5478                         # compact combined diff output can have some patches skipped
5479                         # find which patch (using pathname of result) we are at now;
5480                         if ($is_combined) {
5481                                 while ($to_name ne $diffinfo->{'to_file'}) {
5482                                         print "<div class=\"patch\" id=\"patch". ($patch_idx+1) ."\">\n" .
5483                                               format_diff_cc_simplified($diffinfo, @hash_parents) .
5484                                               "</div>\n";  # class="patch"
5485
5486                                         $patch_idx++;
5487                                         $patch_number++;
5488
5489                                         last if $patch_idx > $#$difftree;
5490                                         $diffinfo = parsed_difftree_line($difftree->[$patch_idx]);
5491                                 }
5492                         }
5493
5494                         # modifies %from, %to hashes
5495                         parse_from_to_diffinfo($diffinfo, \%from, \%to, @hash_parents);
5496
5497                         # this is first patch for raw difftree line with $patch_idx index
5498                         # we index @$difftree array from 0, but number patches from 1
5499                         print "<div class=\"patch\" id=\"patch". ($patch_idx+1) ."\">\n";
5500                 }
5501
5502                 # git diff header
5503                 #assert($patch_line =~ m/^diff /) if DEBUG;
5504                 #assert($patch_line !~ m!$/$!) if DEBUG; # is chomp-ed
5505                 $patch_number++;
5506                 # print "git diff" header
5507                 print format_git_diff_header_line($patch_line, $diffinfo,
5508                                                   \%from, \%to);
5509
5510                 # print extended diff header
5511                 print "<div class=\"diff extended_header\">\n";
5512         EXTENDED_HEADER:
5513                 while ($patch_line = <$fd>) {
5514                         chomp $patch_line;
5515
5516                         last EXTENDED_HEADER if ($patch_line =~ m/^--- |^diff /);
5517
5518                         print format_extended_diff_header_line($patch_line, $diffinfo,
5519                                                                \%from, \%to);
5520                 }
5521                 print "</div>\n"; # class="diff extended_header"
5522
5523                 # from-file/to-file diff header
5524                 if (! $patch_line) {
5525                         print "</div>\n"; # class="patch"
5526                         last PATCH;
5527                 }
5528                 next PATCH if ($patch_line =~ m/^diff /);
5529                 #assert($patch_line =~ m/^---/) if DEBUG;
5530
5531                 my $last_patch_line = $patch_line;
5532                 $patch_line = <$fd>;
5533                 chomp $patch_line;
5534                 #assert($patch_line =~ m/^\+\+\+/) if DEBUG;
5535
5536                 print format_diff_from_to_header($last_patch_line, $patch_line,
5537                                                  $diffinfo, \%from, \%to,
5538                                                  @hash_parents);
5539
5540                 # the patch itself
5541         LINE:
5542                 while ($patch_line = <$fd>) {
5543                         chomp $patch_line;
5544
5545                         next PATCH if ($patch_line =~ m/^diff /);
5546
5547                         my $class = diff_line_class($patch_line, \%from, \%to);
5548
5549                         if ($class eq 'chunk_header') {
5550                                 print_diff_chunk($diff_style, scalar @hash_parents, \%from, \%to, @chunk);
5551                                 @chunk = ();
5552                         }
5553
5554                         push @chunk, [ $class, $patch_line ];
5555                 }
5556
5557         } continue {
5558                 if (@chunk) {
5559                         print_diff_chunk($diff_style, scalar @hash_parents, \%from, \%to, @chunk);
5560                         @chunk = ();
5561                 }
5562                 print "</div>\n"; # class="patch"
5563         }
5564
5565         # for compact combined (--cc) format, with chunk and patch simplification
5566         # the patchset might be empty, but there might be unprocessed raw lines
5567         for (++$patch_idx if $patch_number > 0;
5568              $patch_idx < @$difftree;
5569              ++$patch_idx) {
5570                 # read and prepare patch information
5571                 $diffinfo = parsed_difftree_line($difftree->[$patch_idx]);
5572
5573                 # generate anchor for "patch" links in difftree / whatchanged part
5574                 print "<div class=\"patch\" id=\"patch". ($patch_idx+1) ."\">\n" .
5575                       format_diff_cc_simplified($diffinfo, @hash_parents) .
5576                       "</div>\n";  # class="patch"
5577
5578                 $patch_number++;
5579         }
5580
5581         if ($patch_number == 0) {
5582                 if (@hash_parents > 1) {
5583                         print "<div class=\"diff nodifferences\">Trivial merge</div>\n";
5584                 } else {
5585                         print "<div class=\"diff nodifferences\">No differences found</div>\n";
5586                 }
5587         }
5588
5589         print "</div>\n"; # class="patchset"
5590 }
5591
5592 # . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
5593
5594 sub git_project_search_form {
5595         my ($searchtext, $search_use_regexp) = @_;
5596
5597         my $limit = '';
5598         if ($project_filter) {
5599                 $limit = " in '$project_filter'";
5600         }
5601
5602         print "<div class=\"projsearch\">\n";
5603         print $cgi->start_form(-method => 'get', -action => $my_uri) .
5604               $cgi->hidden(-name => 'a', -value => 'project_list')  . "\n";
5605         print $cgi->hidden(-name => 'pf', -value => $project_filter). "\n"
5606                 if (defined $project_filter);
5607         print $cgi->textfield(-name => 's', -value => $searchtext,
5608                               -title => "Search project by name and description$limit",
5609                               -size => 60) . "\n" .
5610               "<span title=\"Extended regular expression\">" .
5611               $cgi->checkbox(-name => 'sr', -value => 1, -label => 're',
5612                              -checked => $search_use_regexp) .
5613               "</span>\n" .
5614               $cgi->submit(-name => 'btnS', -value => 'Search') .
5615               $cgi->end_form() . "\n" .
5616               "<span class=\"projectlist_link\">" .
5617               $cgi->a({-href => href(project => undef, searchtext => undef,
5618                                      action => 'project_list',
5619                                      project_filter => $project_filter)},
5620                       esc_html("List all projects$limit")) . "</span><br />\n";
5621         print "<span class=\"projectlist_link\">" .
5622               $cgi->a({-href => href(project => undef, searchtext => undef,
5623                                      action => 'project_list',
5624                                      project_filter => undef)},
5625                       esc_html("List all projects")) . "</span>\n" if $project_filter;
5626         print "</div>\n";
5627 }
5628
5629 # entry for given @keys needs filling if at least one of keys in list
5630 # is not present in %$project_info
5631 sub project_info_needs_filling {
5632         my ($project_info, @keys) = @_;
5633
5634         # return List::MoreUtils::any { !exists $project_info->{$_} } @keys;
5635         foreach my $key (@keys) {
5636                 if (!exists $project_info->{$key}) {
5637                         return 1;
5638                 }
5639         }
5640         return;
5641 }
5642
5643 # fills project list info (age, description, owner, category, forks, etc.)
5644 # for each project in the list, removing invalid projects from
5645 # returned list, or fill only specified info.
5646 #
5647 # Invalid projects are removed from the returned list if and only if you
5648 # ask 'age' or 'age_string' to be filled, because they are the only fields
5649 # that run unconditionally git command that requires repository, and
5650 # therefore do always check if project repository is invalid.
5651 #
5652 # USAGE:
5653 # * fill_project_list_info(\@project_list, 'descr_long', 'ctags')
5654 #   ensures that 'descr_long' and 'ctags' fields are filled
5655 # * @project_list = fill_project_list_info(\@project_list)
5656 #   ensures that all fields are filled (and invalid projects removed)
5657 #
5658 # NOTE: modifies $projlist, but does not remove entries from it
5659 sub fill_project_list_info {
5660         my ($projlist, @wanted_keys) = @_;
5661         my @projects;
5662         my $filter_set = sub { return @_; };
5663         if (@wanted_keys) {
5664                 my %wanted_keys = map { $_ => 1 } @wanted_keys;
5665                 $filter_set = sub { return grep { $wanted_keys{$_} } @_; };
5666         }
5667
5668         my $show_ctags = gitweb_check_feature('ctags');
5669  PROJECT:
5670         foreach my $pr (@$projlist) {
5671                 if (project_info_needs_filling($pr, $filter_set->('age', 'age_string'))) {
5672                         my (@activity) = git_get_last_activity($pr->{'path'});
5673                         unless (@activity) {
5674                                 next PROJECT;
5675                         }
5676                         ($pr->{'age'}, $pr->{'age_string'}) = @activity;
5677                 }
5678                 if (project_info_needs_filling($pr, $filter_set->('descr', 'descr_long'))) {
5679                         my $descr = git_get_project_description($pr->{'path'}) || "";
5680                         $descr = to_utf8($descr);
5681                         $pr->{'descr_long'} = $descr;
5682                         $pr->{'descr'} = chop_str($descr, $projects_list_description_width, 5);
5683                 }
5684                 if (project_info_needs_filling($pr, $filter_set->('owner'))) {
5685                         $pr->{'owner'} = git_get_project_owner("$pr->{'path'}") || "";
5686                 }
5687                 if ($show_ctags &&
5688                     project_info_needs_filling($pr, $filter_set->('ctags'))) {
5689                         $pr->{'ctags'} = git_get_project_ctags($pr->{'path'});
5690                 }
5691                 if ($projects_list_group_categories &&
5692                     project_info_needs_filling($pr, $filter_set->('category'))) {
5693                         my $cat = git_get_project_category($pr->{'path'}) ||
5694                                                            $project_list_default_category;
5695                         $pr->{'category'} = to_utf8($cat);
5696                 }
5697
5698                 push @projects, $pr;
5699         }
5700
5701         return @projects;
5702 }
5703
5704 sub sort_projects_list {
5705         my ($projlist, $order) = @_;
5706
5707         sub order_str {
5708                 my $key = shift;
5709                 return sub { $a->{$key} cmp $b->{$key} };
5710         }
5711
5712         sub order_num_then_undef {
5713                 my $key = shift;
5714                 return sub {
5715                         defined $a->{$key} ?
5716                                 (defined $b->{$key} ? $a->{$key} <=> $b->{$key} : -1) :
5717                                 (defined $b->{$key} ? 1 : 0)
5718                 };
5719         }
5720
5721         my %orderings = (
5722                 project => order_str('path'),
5723                 descr => order_str('descr_long'),
5724                 owner => order_str('owner'),
5725                 age => order_num_then_undef('age'),
5726         );
5727
5728         my $ordering = $orderings{$order};
5729         return defined $ordering ? sort $ordering @$projlist : @$projlist;
5730 }
5731
5732 # returns a hash of categories, containing the list of project
5733 # belonging to each category
5734 sub build_projlist_by_category {
5735         my ($projlist, $from, $to) = @_;
5736         my %categories;
5737
5738         $from = 0 unless defined $from;
5739         $to = $#$projlist if (!defined $to || $#$projlist < $to);
5740
5741         for (my $i = $from; $i <= $to; $i++) {
5742                 my $pr = $projlist->[$i];
5743                 push @{$categories{ $pr->{'category'} }}, $pr;
5744         }
5745
5746         return wantarray ? %categories : \%categories;
5747 }
5748
5749 # print 'sort by' <th> element, generating 'sort by $name' replay link
5750 # if that order is not selected
5751 sub print_sort_th {
5752         print format_sort_th(@_);
5753 }
5754
5755 sub format_sort_th {
5756         my ($name, $order, $header) = @_;
5757         my $sort_th = "";
5758         $header ||= ucfirst($name);
5759
5760         if ($order eq $name) {
5761                 $sort_th .= "<th>$header</th>\n";
5762         } else {
5763                 $sort_th .= "<th>" .
5764                             $cgi->a({-href => href(-replay=>1, order=>$name),
5765                                      -class => "header"}, $header) .
5766                             "</th>\n";
5767         }
5768
5769         return $sort_th;
5770 }
5771
5772 sub git_project_list_rows {
5773         my ($projlist, $from, $to, $check_forks) = @_;
5774
5775         $from = 0 unless defined $from;
5776         $to = $#$projlist if (!defined $to || $#$projlist < $to);
5777
5778         my $alternate = 1;
5779         for (my $i = $from; $i <= $to; $i++) {
5780                 my $pr = $projlist->[$i];
5781
5782                 if ($alternate) {
5783                         print "<tr class=\"dark\">\n";
5784                 } else {
5785                         print "<tr class=\"light\">\n";
5786                 }
5787                 $alternate ^= 1;
5788
5789                 if ($check_forks) {
5790                         print "<td>";
5791                         if ($pr->{'forks'}) {
5792                                 my $nforks = scalar @{$pr->{'forks'}};
5793                                 if ($nforks > 0) {
5794                                         print $cgi->a({-href => href(project=>$pr->{'path'}, action=>"forks"),
5795                                                        -title => "$nforks forks"}, "+");
5796                                 } else {
5797                                         print $cgi->span({-title => "$nforks forks"}, "+");
5798                                 }
5799                         }
5800                         print "</td>\n";
5801                 }
5802                 print "<td>" . $cgi->a({-href => href(project=>$pr->{'path'}, action=>"summary"),
5803                                         -class => "list"},
5804                                        esc_html_match_hl($pr->{'path'}, $search_regexp)) .
5805                       "</td>\n" .
5806                       "<td>" . $cgi->a({-href => href(project=>$pr->{'path'}, action=>"summary"),
5807                                         -class => "list",
5808                                         -title => $pr->{'descr_long'}},
5809                                         $search_regexp
5810                                         ? esc_html_match_hl_chopped($pr->{'descr_long'},
5811                                                                     $pr->{'descr'}, $search_regexp)
5812                                         : esc_html($pr->{'descr'})) .
5813                       "</td>\n";
5814                 unless ($omit_owner) {
5815                         print "<td><i>" . chop_and_escape_str($pr->{'owner'}, 15) . "</i></td>\n";
5816                 }
5817                 unless ($omit_age_column) {
5818                         print "<td class=\"". age_class($pr->{'age'}) . "\">" .
5819                             (defined $pr->{'age_string'} ? $pr->{'age_string'} : "No commits") . "</td>\n";
5820                 }
5821                 print"<td class=\"link\">" .
5822                       $cgi->a({-href => href(project=>$pr->{'path'}, action=>"summary")}, "summary")   . " | " .
5823                       $cgi->a({-href => href(project=>$pr->{'path'}, action=>"shortlog")}, "shortlog") . " | " .
5824                       $cgi->a({-href => href(project=>$pr->{'path'}, action=>"log")}, "log") . " | " .
5825                       $cgi->a({-href => href(project=>$pr->{'path'}, action=>"tree")}, "tree") .
5826                       ($pr->{'forks'} ? " | " . $cgi->a({-href => href(project=>$pr->{'path'}, action=>"forks")}, "forks") : '') .
5827                       "</td>\n" .
5828                       "</tr>\n";
5829         }
5830 }
5831
5832 sub git_project_list_body {
5833         # actually uses global variable $project
5834         my ($projlist, $order, $from, $to, $extra, $no_header, $ctags_action) = @_;
5835         my @projects = @$projlist;
5836
5837         my $check_forks = gitweb_check_feature('forks');
5838         my $show_ctags  = gitweb_check_feature('ctags');
5839         my $tagfilter = $show_ctags ? $input_params{'ctag_filter'} : undef;
5840         $check_forks = undef
5841                 if ($tagfilter || $search_regexp);
5842
5843         # filtering out forks before filling info allows to do less work
5844         @projects = filter_forks_from_projects_list(\@projects)
5845                 if ($check_forks);
5846         # search_projects_list pre-fills required info
5847         @projects = search_projects_list(\@projects,
5848                                          'search_regexp' => $search_regexp,
5849                                          'tagfilter'  => $tagfilter)
5850                 if ($tagfilter || $search_regexp);
5851         # fill the rest
5852         my @all_fields = ('descr', 'descr_long', 'ctags', 'category');
5853         push @all_fields, ('age', 'age_string') unless($omit_age_column);
5854         push @all_fields, 'owner' unless($omit_owner);
5855         @projects = fill_project_list_info(\@projects, @all_fields);
5856
5857         $order ||= $default_projects_order;
5858         $from = 0 unless defined $from;
5859         $to = $#projects if (!defined $to || $#projects < $to);
5860
5861         # short circuit
5862         if ($from > $to) {
5863                 print "<center>\n".
5864                       "<b>No such projects found</b><br />\n".
5865                       "Click ".$cgi->a({-href=>href(project=>undef,action=>'project_list')},"here")." to view all projects<br />\n".
5866                       "</center>\n<br />\n";
5867                 return;
5868         }
5869
5870         @projects = sort_projects_list(\@projects, $order);
5871
5872         if ($show_ctags) {
5873                 my $ctags = git_gather_all_ctags(\@projects);
5874                 my $cloud = git_populate_project_tagcloud($ctags, $ctags_action||'project_list');
5875                 print git_show_project_tagcloud($cloud, 64);
5876         }
5877
5878         print "<table class=\"project_list\">\n";
5879         unless ($no_header) {
5880                 print "<tr>\n";
5881                 if ($check_forks) {
5882                         print "<th></th>\n";
5883                 }
5884                 print_sort_th('project', $order, 'Project');
5885                 print_sort_th('descr', $order, 'Description');
5886                 print_sort_th('owner', $order, 'Owner') unless $omit_owner;
5887                 print_sort_th('age', $order, 'Last Change') unless $omit_age_column;
5888                 print "<th></th>\n" . # for links
5889                       "</tr>\n";
5890         }
5891
5892         if ($projects_list_group_categories) {
5893                 # only display categories with projects in the $from-$to window
5894                 @projects = sort {$a->{'category'} cmp $b->{'category'}} @projects[$from..$to];
5895                 my %categories = build_projlist_by_category(\@projects, $from, $to);
5896                 foreach my $cat (sort keys %categories) {
5897                         unless ($cat eq "") {
5898                                 print "<tr>\n";
5899                                 if ($check_forks) {
5900                                         print "<td></td>\n";
5901                                 }
5902                                 print "<td class=\"category\" colspan=\"5\">".esc_html($cat)."</td>\n";
5903                                 print "</tr>\n";
5904                         }
5905
5906                         git_project_list_rows($categories{$cat}, undef, undef, $check_forks);
5907                 }
5908         } else {
5909                 git_project_list_rows(\@projects, $from, $to, $check_forks);
5910         }
5911
5912         if (defined $extra) {
5913                 print "<tr>\n";
5914                 if ($check_forks) {
5915                         print "<td></td>\n";
5916                 }
5917                 print "<td colspan=\"5\">$extra</td>\n" .
5918                       "</tr>\n";
5919         }
5920         print "</table>\n";
5921 }
5922
5923 sub git_log_body {
5924         # uses global variable $project
5925         my ($commitlist, $from, $to, $refs, $extra) = @_;
5926
5927         $from = 0 unless defined $from;
5928         $to = $#{$commitlist} if (!defined $to || $#{$commitlist} < $to);
5929
5930         for (my $i = 0; $i <= $to; $i++) {
5931                 my %co = %{$commitlist->[$i]};
5932                 next if !%co;
5933                 my $commit = $co{'id'};
5934                 my $ref = format_ref_marker($refs, $commit);
5935                 git_print_header_div('commit',
5936                                "<span class=\"age\">$co{'age_string'}</span>" .
5937                                esc_html($co{'title'}) . $ref,
5938                                $commit);
5939                 print "<div class=\"title_text\">\n" .
5940                       "<div class=\"log_link\">\n" .
5941                       $cgi->a({-href => href(action=>"commit", hash=>$commit)}, "commit") .
5942                       " | " .
5943                       $cgi->a({-href => href(action=>"commitdiff", hash=>$commit)}, "commitdiff") .
5944                       " | " .
5945                       $cgi->a({-href => href(action=>"tree", hash=>$commit, hash_base=>$commit)}, "tree") .
5946                       "<br/>\n" .
5947                       "</div>\n";
5948                       git_print_authorship(\%co, -tag => 'span');
5949                       print "<br/>\n</div>\n";
5950
5951                 print "<div class=\"log_body\">\n";
5952                 git_print_log($co{'comment'}, -final_empty_line=> 1);
5953                 print "</div>\n";
5954         }
5955         if ($extra) {
5956                 print "<div class=\"page_nav\">\n";
5957                 print "$extra\n";
5958                 print "</div>\n";
5959         }
5960 }
5961
5962 sub git_shortlog_body {
5963         # uses global variable $project
5964         my ($commitlist, $from, $to, $refs, $extra) = @_;
5965
5966         $from = 0 unless defined $from;
5967         $to = $#{$commitlist} if (!defined $to || $#{$commitlist} < $to);
5968
5969         print "<table class=\"shortlog\">\n";
5970         my $alternate = 1;
5971         for (my $i = $from; $i <= $to; $i++) {
5972                 my %co = %{$commitlist->[$i]};
5973                 my $commit = $co{'id'};
5974                 my $ref = format_ref_marker($refs, $commit);
5975                 if ($alternate) {
5976                         print "<tr class=\"dark\">\n";
5977                 } else {
5978                         print "<tr class=\"light\">\n";
5979                 }
5980                 $alternate ^= 1;
5981                 # git_summary() used print "<td><i>$co{'age_string'}</i></td>\n" .
5982                 print "<td title=\"$co{'age_string_age'}\"><i>$co{'age_string_date'}</i></td>\n" .
5983                       format_author_html('td', \%co, 10) . "<td>";
5984                 print format_subject_html($co{'title'}, $co{'title_short'},
5985                                           href(action=>"commit", hash=>$commit), $ref);
5986                 print "</td>\n" .
5987                       "<td class=\"link\">" .
5988                       $cgi->a({-href => href(action=>"commit", hash=>$commit)}, "commit") . " | " .
5989                       $cgi->a({-href => href(action=>"commitdiff", hash=>$commit)}, "commitdiff") . " | " .
5990                       $cgi->a({-href => href(action=>"tree", hash=>$commit, hash_base=>$commit)}, "tree");
5991                 my $snapshot_links = format_snapshot_links($commit);
5992                 if (defined $snapshot_links) {
5993                         print " | " . $snapshot_links;
5994                 }
5995                 print "</td>\n" .
5996                       "</tr>\n";
5997         }
5998         if (defined $extra) {
5999                 print "<tr>\n" .
6000                       "<td colspan=\"4\">$extra</td>\n" .
6001                       "</tr>\n";
6002         }
6003         print "</table>\n";
6004 }
6005
6006 sub git_history_body {
6007         # Warning: assumes constant type (blob or tree) during history
6008         my ($commitlist, $from, $to, $refs, $extra,
6009             $file_name, $file_hash, $ftype) = @_;
6010
6011         $from = 0 unless defined $from;
6012         $to = $#{$commitlist} unless (defined $to && $to <= $#{$commitlist});
6013
6014         print "<table class=\"history\">\n";
6015         my $alternate = 1;
6016         for (my $i = $from; $i <= $to; $i++) {
6017                 my %co = %{$commitlist->[$i]};
6018                 if (!%co) {
6019                         next;
6020                 }
6021                 my $commit = $co{'id'};
6022
6023                 my $ref = format_ref_marker($refs, $commit);
6024
6025                 if ($alternate) {
6026                         print "<tr class=\"dark\">\n";
6027                 } else {
6028                         print "<tr class=\"light\">\n";
6029                 }
6030                 $alternate ^= 1;
6031                 print "<td title=\"$co{'age_string_age'}\"><i>$co{'age_string_date'}</i></td>\n" .
6032         # shortlog:   format_author_html('td', \%co, 10)
6033                       format_author_html('td', \%co, 15, 3) . "<td>";
6034                 # originally git_history used chop_str($co{'title'}, 50)
6035                 print format_subject_html($co{'title'}, $co{'title_short'},
6036                                           href(action=>"commit", hash=>$commit), $ref);
6037                 print "</td>\n" .
6038                       "<td class=\"link\">" .
6039                       $cgi->a({-href => href(action=>$ftype, hash_base=>$commit, file_name=>$file_name)}, $ftype) . " | " .
6040                       $cgi->a({-href => href(action=>"commitdiff", hash=>$commit)}, "commitdiff");
6041
6042                 if ($ftype eq 'blob') {
6043                         my $blob_current = $file_hash;
6044                         my $blob_parent  = git_get_hash_by_path($commit, $file_name);
6045                         if (defined $blob_current && defined $blob_parent &&
6046                                         $blob_current ne $blob_parent) {
6047                                 print " | " .
6048                                         $cgi->a({-href => href(action=>"blobdiff",
6049                                                                hash=>$blob_current, hash_parent=>$blob_parent,
6050                                                                hash_base=>$hash_base, hash_parent_base=>$commit,
6051                                                                file_name=>$file_name)},
6052                                                 "diff to current");
6053                         }
6054                 }
6055                 print "</td>\n" .
6056                       "</tr>\n";
6057         }
6058         if (defined $extra) {
6059                 print "<tr>\n" .
6060                       "<td colspan=\"4\">$extra</td>\n" .
6061                       "</tr>\n";
6062         }
6063         print "</table>\n";
6064 }
6065
6066 sub git_tags_body {
6067         # uses global variable $project
6068         my ($taglist, $from, $to, $extra) = @_;
6069         $from = 0 unless defined $from;
6070         $to = $#{$taglist} if (!defined $to || $#{$taglist} < $to);
6071
6072         print "<table class=\"tags\">\n";
6073         my $alternate = 1;
6074         for (my $i = $from; $i <= $to; $i++) {
6075                 my $entry = $taglist->[$i];
6076                 my %tag = %$entry;
6077                 my $comment = $tag{'subject'};
6078                 my $comment_short;
6079                 if (defined $comment) {
6080                         $comment_short = chop_str($comment, 30, 5);
6081                 }
6082                 if ($alternate) {
6083                         print "<tr class=\"dark\">\n";
6084                 } else {
6085                         print "<tr class=\"light\">\n";
6086                 }
6087                 $alternate ^= 1;
6088                 if (defined $tag{'age'}) {
6089                         print "<td><i>$tag{'age'}</i></td>\n";
6090                 } else {
6091                         print "<td></td>\n";
6092                 }
6093                 print "<td>" .
6094                       $cgi->a({-href => href(action=>$tag{'reftype'}, hash=>$tag{'refid'}),
6095                                -class => "list name"}, esc_html($tag{'name'})) .
6096                       "</td>\n" .
6097                       "<td>";
6098                 if (defined $comment) {
6099                         print format_subject_html($comment, $comment_short,
6100                                                   href(action=>"tag", hash=>$tag{'id'}));
6101                 }
6102                 print "</td>\n" .
6103                       "<td class=\"selflink\">";
6104                 if ($tag{'type'} eq "tag") {
6105                         print $cgi->a({-href => href(action=>"tag", hash=>$tag{'id'})}, "tag");
6106                 } else {
6107                         print "&nbsp;";
6108                 }
6109                 print "</td>\n" .
6110                       "<td class=\"link\">" . " | " .
6111                       $cgi->a({-href => href(action=>$tag{'reftype'}, hash=>$tag{'refid'})}, $tag{'reftype'});
6112                 if ($tag{'reftype'} eq "commit") {
6113                         print " | " . $cgi->a({-href => href(action=>"shortlog", hash=>$tag{'fullname'})}, "shortlog") .
6114                               " | " . $cgi->a({-href => href(action=>"log", hash=>$tag{'fullname'})}, "log");
6115                 } elsif ($tag{'reftype'} eq "blob") {
6116                         print " | " . $cgi->a({-href => href(action=>"blob_plain", hash=>$tag{'refid'})}, "raw");
6117                 }
6118                 print "</td>\n" .
6119                       "</tr>";
6120         }
6121         if (defined $extra) {
6122                 print "<tr>\n" .
6123                       "<td colspan=\"5\">$extra</td>\n" .
6124                       "</tr>\n";
6125         }
6126         print "</table>\n";
6127 }
6128
6129 sub git_heads_body {
6130         # uses global variable $project
6131         my ($headlist, $head_at, $from, $to, $extra) = @_;
6132         $from = 0 unless defined $from;
6133         $to = $#{$headlist} if (!defined $to || $#{$headlist} < $to);
6134
6135         print "<table class=\"heads\">\n";
6136         my $alternate = 1;
6137         for (my $i = $from; $i <= $to; $i++) {
6138                 my $entry = $headlist->[$i];
6139                 my %ref = %$entry;
6140                 my $curr = defined $head_at && $ref{'id'} eq $head_at;
6141                 if ($alternate) {
6142                         print "<tr class=\"dark\">\n";
6143                 } else {
6144                         print "<tr class=\"light\">\n";
6145                 }
6146                 $alternate ^= 1;
6147                 print "<td><i>$ref{'age'}</i></td>\n" .
6148                       ($curr ? "<td class=\"current_head\">" : "<td>") .
6149                       $cgi->a({-href => href(action=>"shortlog", hash=>$ref{'fullname'}),
6150                                -class => "list name"},esc_html($ref{'name'})) .
6151                       "</td>\n" .
6152                       "<td class=\"link\">" .
6153                       $cgi->a({-href => href(action=>"shortlog", hash=>$ref{'fullname'})}, "shortlog") . " | " .
6154                       $cgi->a({-href => href(action=>"log", hash=>$ref{'fullname'})}, "log") . " | " .
6155                       $cgi->a({-href => href(action=>"tree", hash=>$ref{'fullname'}, hash_base=>$ref{'fullname'})}, "tree") .
6156                       "</td>\n" .
6157                       "</tr>";
6158         }
6159         if (defined $extra) {
6160                 print "<tr>\n" .
6161                       "<td colspan=\"3\">$extra</td>\n" .
6162                       "</tr>\n";
6163         }
6164         print "</table>\n";
6165 }
6166
6167 # Display a single remote block
6168 sub git_remote_block {
6169         my ($remote, $rdata, $limit, $head) = @_;
6170
6171         my $heads = $rdata->{'heads'};
6172         my $fetch = $rdata->{'fetch'};
6173         my $push = $rdata->{'push'};
6174
6175         my $urls_table = "<table class=\"projects_list\">\n" ;
6176
6177         if (defined $fetch) {
6178                 if ($fetch eq $push) {
6179                         $urls_table .= format_repo_url("URL", $fetch);
6180                 } else {
6181                         $urls_table .= format_repo_url("Fetch URL", $fetch);
6182                         $urls_table .= format_repo_url("Push URL", $push) if defined $push;
6183                 }
6184         } elsif (defined $push) {
6185                 $urls_table .= format_repo_url("Push URL", $push);
6186         } else {
6187                 $urls_table .= format_repo_url("", "No remote URL");
6188         }
6189
6190         $urls_table .= "</table>\n";
6191
6192         my $dots;
6193         if (defined $limit && $limit < @$heads) {
6194                 $dots = $cgi->a({-href => href(action=>"remotes", hash=>$remote)}, "...");
6195         }
6196
6197         print $urls_table;
6198         git_heads_body($heads, $head, 0, $limit, $dots);
6199 }
6200
6201 # Display a list of remote names with the respective fetch and push URLs
6202 sub git_remotes_list {
6203         my ($remotedata, $limit) = @_;
6204         print "<table class=\"heads\">\n";
6205         my $alternate = 1;
6206         my @remotes = sort keys %$remotedata;
6207
6208         my $limited = $limit && $limit < @remotes;
6209
6210         $#remotes = $limit - 1 if $limited;
6211
6212         while (my $remote = shift @remotes) {
6213                 my $rdata = $remotedata->{$remote};
6214                 my $fetch = $rdata->{'fetch'};
6215                 my $push = $rdata->{'push'};
6216                 if ($alternate) {
6217                         print "<tr class=\"dark\">\n";
6218                 } else {
6219                         print "<tr class=\"light\">\n";
6220                 }
6221                 $alternate ^= 1;
6222                 print "<td>" .
6223                       $cgi->a({-href=> href(action=>'remotes', hash=>$remote),
6224                                -class=> "list name"},esc_html($remote)) .
6225                       "</td>";
6226                 print "<td class=\"link\">" .
6227                       (defined $fetch ? $cgi->a({-href=> $fetch}, "fetch") : "fetch") .
6228                       " | " .
6229                       (defined $push ? $cgi->a({-href=> $push}, "push") : "push") .
6230                       "</td>";
6231
6232                 print "</tr>\n";
6233         }
6234
6235         if ($limited) {
6236                 print "<tr>\n" .
6237                       "<td colspan=\"3\">" .
6238                       $cgi->a({-href => href(action=>"remotes")}, "...") .
6239                       "</td>\n" . "</tr>\n";
6240         }
6241
6242         print "</table>";
6243 }
6244
6245 # Display remote heads grouped by remote, unless there are too many
6246 # remotes, in which case we only display the remote names
6247 sub git_remotes_body {
6248         my ($remotedata, $limit, $head) = @_;
6249         if ($limit and $limit < keys %$remotedata) {
6250                 git_remotes_list($remotedata, $limit);
6251         } else {
6252                 fill_remote_heads($remotedata);
6253                 while (my ($remote, $rdata) = each %$remotedata) {
6254                         git_print_section({-class=>"remote", -id=>$remote},
6255                                 ["remotes", $remote, $remote], sub {
6256                                         git_remote_block($remote, $rdata, $limit, $head);
6257                                 });
6258                 }
6259         }
6260 }
6261
6262 sub git_search_message {
6263         my %co = @_;
6264
6265         my $greptype;
6266         if ($searchtype eq 'commit') {
6267                 $greptype = "--grep=";
6268         } elsif ($searchtype eq 'author') {
6269                 $greptype = "--author=";
6270         } elsif ($searchtype eq 'committer') {
6271                 $greptype = "--committer=";
6272         }
6273         $greptype .= $searchtext;
6274         my @commitlist = parse_commits($hash, 101, (100 * $page), undef,
6275                                        $greptype, '--regexp-ignore-case',
6276                                        $search_use_regexp ? '--extended-regexp' : '--fixed-strings');
6277
6278         my $paging_nav = '';
6279         if ($page > 0) {
6280                 $paging_nav .=
6281                         $cgi->a({-href => href(-replay=>1, page=>undef)},
6282                                 "first") .
6283                         " &sdot; " .
6284                         $cgi->a({-href => href(-replay=>1, page=>$page-1),
6285                                  -accesskey => "p", -title => "Alt-p"}, "prev");
6286         } else {
6287                 $paging_nav .= "first &sdot; prev";
6288         }
6289         my $next_link = '';
6290         if ($#commitlist >= 100) {
6291                 $next_link =
6292                         $cgi->a({-href => href(-replay=>1, page=>$page+1),
6293                                  -accesskey => "n", -title => "Alt-n"}, "next");
6294                 $paging_nav .= " &sdot; $next_link";
6295         } else {
6296                 $paging_nav .= " &sdot; next";
6297         }
6298
6299         git_header_html();
6300
6301         git_print_page_nav('','', $hash,$co{'tree'},$hash, $paging_nav);
6302         git_print_header_div('commit', esc_html($co{'title'}), $hash);
6303         if ($page == 0 && !@commitlist) {
6304                 print "<p>No match.</p>\n";
6305         } else {
6306                 git_search_grep_body(\@commitlist, 0, 99, $next_link);
6307         }
6308
6309         git_footer_html();
6310 }
6311
6312 sub git_search_changes {
6313         my %co = @_;
6314
6315         local $/ = "\n";
6316         open my $fd, '-|', git_cmd(), '--no-pager', 'log', @diff_opts,
6317                 '--pretty=format:%H', '--no-abbrev', '--raw', "-S$searchtext",
6318                 ($search_use_regexp ? '--pickaxe-regex' : ())
6319                         or die_error(500, "Open git-log failed");
6320
6321         git_header_html();
6322
6323         git_print_page_nav('','', $hash,$co{'tree'},$hash);
6324         git_print_header_div('commit', esc_html($co{'title'}), $hash);
6325
6326         print "<table class=\"pickaxe search\">\n";
6327         my $alternate = 1;
6328         undef %co;
6329         my @files;
6330         while (my $line = <$fd>) {
6331                 chomp $line;
6332                 next unless $line;
6333
6334                 my %set = parse_difftree_raw_line($line);
6335                 if (defined $set{'commit'}) {
6336                         # finish previous commit
6337                         if (%co) {
6338                                 print "</td>\n" .
6339                                       "<td class=\"link\">" .
6340                                       $cgi->a({-href => href(action=>"commit", hash=>$co{'id'})},
6341                                               "commit") .
6342                                       " | " .
6343                                       $cgi->a({-href => href(action=>"tree", hash=>$co{'tree'},
6344                                                              hash_base=>$co{'id'})},
6345                                               "tree") .
6346                                       "</td>\n" .
6347                                       "</tr>\n";
6348                         }
6349
6350                         if ($alternate) {
6351                                 print "<tr class=\"dark\">\n";
6352                         } else {
6353                                 print "<tr class=\"light\">\n";
6354                         }
6355                         $alternate ^= 1;
6356                         %co = parse_commit($set{'commit'});
6357                         my $author = chop_and_escape_str($co{'author_name'}, 15, 5);
6358                         print "<td title=\"$co{'age_string_age'}\"><i>$co{'age_string_date'}</i></td>\n" .
6359                               "<td><i>$author</i></td>\n" .
6360                               "<td>" .
6361                               $cgi->a({-href => href(action=>"commit", hash=>$co{'id'}),
6362                                       -class => "list subject"},
6363                                       chop_and_escape_str($co{'title'}, 50) . "<br/>");
6364                 } elsif (defined $set{'to_id'}) {
6365                         next if ($set{'to_id'} =~ m/^0{40}$/);
6366
6367                         print $cgi->a({-href => href(action=>"blob", hash_base=>$co{'id'},
6368                                                      hash=>$set{'to_id'}, file_name=>$set{'to_file'}),
6369                                       -class => "list"},
6370                                       "<span class=\"match\">" . esc_path($set{'file'}) . "</span>") .
6371                               "<br/>\n";
6372                 }
6373         }
6374         close $fd;
6375
6376         # finish last commit (warning: repetition!)
6377         if (%co) {
6378                 print "</td>\n" .
6379                       "<td class=\"link\">" .
6380                       $cgi->a({-href => href(action=>"commit", hash=>$co{'id'})},
6381                               "commit") .
6382                       " | " .
6383                       $cgi->a({-href => href(action=>"tree", hash=>$co{'tree'},
6384                                              hash_base=>$co{'id'})},
6385                               "tree") .
6386                       "</td>\n" .
6387                       "</tr>\n";
6388         }
6389
6390         print "</table>\n";
6391
6392         git_footer_html();
6393 }
6394
6395 sub git_search_files {
6396         my %co = @_;
6397
6398         local $/ = "\n";
6399         open my $fd, "-|", git_cmd(), 'grep', '-n', '-z',
6400                 $search_use_regexp ? ('-E', '-i') : '-F',
6401                 $searchtext, $co{'tree'}
6402                         or die_error(500, "Open git-grep failed");
6403
6404         git_header_html();
6405
6406         git_print_page_nav('','', $hash,$co{'tree'},$hash);
6407         git_print_header_div('commit', esc_html($co{'title'}), $hash);
6408
6409         print "<table class=\"grep_search\">\n";
6410         my $alternate = 1;
6411         my $matches = 0;
6412         my $lastfile = '';
6413         my $file_href;
6414         while (my $line = <$fd>) {
6415                 chomp $line;
6416                 my ($file, $lno, $ltext, $binary);
6417                 last if ($matches++ > 1000);
6418                 if ($line =~ /^Binary file (.+) matches$/) {
6419                         $file = $1;
6420                         $binary = 1;
6421                 } else {
6422                         ($file, $lno, $ltext) = split(/\0/, $line, 3);
6423                         $file =~ s/^$co{'tree'}://;
6424                 }
6425                 if ($file ne $lastfile) {
6426                         $lastfile and print "</td></tr>\n";
6427                         if ($alternate++) {
6428                                 print "<tr class=\"dark\">\n";
6429                         } else {
6430                                 print "<tr class=\"light\">\n";
6431                         }
6432                         $file_href = href(action=>"blob", hash_base=>$co{'id'},
6433                                           file_name=>$file);
6434                         print "<td class=\"list\">".
6435                                 $cgi->a({-href => $file_href, -class => "list"}, esc_path($file));
6436                         print "</td><td>\n";
6437                         $lastfile = $file;
6438                 }
6439                 if ($binary) {
6440                         print "<div class=\"binary\">Binary file</div>\n";
6441                 } else {
6442                         $ltext = untabify($ltext);
6443                         if ($ltext =~ m/^(.*)($search_regexp)(.*)$/i) {
6444                                 $ltext = esc_html($1, -nbsp=>1);
6445                                 $ltext .= '<span class="match">';
6446                                 $ltext .= esc_html($2, -nbsp=>1);
6447                                 $ltext .= '</span>';
6448                                 $ltext .= esc_html($3, -nbsp=>1);
6449                         } else {
6450                                 $ltext = esc_html($ltext, -nbsp=>1);
6451                         }
6452                         print "<div class=\"pre\">" .
6453                                 $cgi->a({-href => $file_href.'#l'.$lno,
6454                                         -class => "linenr"}, sprintf('%4i', $lno)) .
6455                                 ' ' .  $ltext . "</div>\n";
6456                 }
6457         }
6458         if ($lastfile) {
6459                 print "</td></tr>\n";
6460                 if ($matches > 1000) {
6461                         print "<div class=\"diff nodifferences\">Too many matches, listing trimmed</div>\n";
6462                 }
6463         } else {
6464                 print "<div class=\"diff nodifferences\">No matches found</div>\n";
6465         }
6466         close $fd;
6467
6468         print "</table>\n";
6469
6470         git_footer_html();
6471 }
6472
6473 sub git_search_grep_body {
6474         my ($commitlist, $from, $to, $extra) = @_;
6475         $from = 0 unless defined $from;
6476         $to = $#{$commitlist} if (!defined $to || $#{$commitlist} < $to);
6477
6478         print "<table class=\"commit_search\">\n";
6479         my $alternate = 1;
6480         for (my $i = $from; $i <= $to; $i++) {
6481                 my %co = %{$commitlist->[$i]};
6482                 if (!%co) {
6483                         next;
6484                 }
6485                 my $commit = $co{'id'};
6486                 if ($alternate) {
6487                         print "<tr class=\"dark\">\n";
6488                 } else {
6489                         print "<tr class=\"light\">\n";
6490                 }
6491                 $alternate ^= 1;
6492                 print "<td title=\"$co{'age_string_age'}\"><i>$co{'age_string_date'}</i></td>\n" .
6493                       format_author_html('td', \%co, 15, 5) .
6494                       "<td>" .
6495                       $cgi->a({-href => href(action=>"commit", hash=>$co{'id'}),
6496                                -class => "list subject"},
6497                               chop_and_escape_str($co{'title'}, 50) . "<br/>");
6498                 my $comment = $co{'comment'};
6499                 foreach my $line (@$comment) {
6500                         if ($line =~ m/^(.*?)($search_regexp)(.*)$/i) {
6501                                 my ($lead, $match, $trail) = ($1, $2, $3);
6502                                 $match = chop_str($match, 70, 5, 'center');
6503                                 my $contextlen = int((80 - length($match))/2);
6504                                 $contextlen = 30 if ($contextlen > 30);
6505                                 $lead  = chop_str($lead,  $contextlen, 10, 'left');
6506                                 $trail = chop_str($trail, $contextlen, 10, 'right');
6507
6508                                 $lead  = esc_html($lead);
6509                                 $match = esc_html($match);
6510                                 $trail = esc_html($trail);
6511
6512                                 print "$lead<span class=\"match\">$match</span>$trail<br />";
6513                         }
6514                 }
6515                 print "</td>\n" .
6516                       "<td class=\"link\">" .
6517                       $cgi->a({-href => href(action=>"commit", hash=>$co{'id'})}, "commit") .
6518                       " | " .
6519                       $cgi->a({-href => href(action=>"commitdiff", hash=>$co{'id'})}, "commitdiff") .
6520                       " | " .
6521                       $cgi->a({-href => href(action=>"tree", hash=>$co{'tree'}, hash_base=>$co{'id'})}, "tree");
6522                 print "</td>\n" .
6523                       "</tr>\n";
6524         }
6525         if (defined $extra) {
6526                 print "<tr>\n" .
6527                       "<td colspan=\"3\">$extra</td>\n" .
6528                       "</tr>\n";
6529         }
6530         print "</table>\n";
6531 }
6532
6533 ## ======================================================================
6534 ## ======================================================================
6535 ## actions
6536
6537 sub git_project_list_load {
6538         my $empty_list_ok = shift;
6539         my $order = $input_params{'order'};
6540         if (defined $order && $order !~ m/none|project|descr|owner|age/) {
6541                 die_error(400, "Unknown order parameter");
6542         }
6543
6544         my @list = git_get_projects_list($project_filter, $strict_export);
6545         if (!@list) {
6546                 die_error(404, "No projects found") unless $empty_list_ok;
6547         }
6548
6549         return (\@list, $order);
6550 }
6551
6552 sub git_frontpage {
6553         my ($projlist, $order);
6554
6555         if ($frontpage_no_project_list) {
6556                 $project = undef;
6557                 $project_filter = undef;
6558         } else {
6559                 ($projlist, $order) = git_project_list_load(1);
6560         }
6561         git_header_html();
6562         if (defined $home_text && -f $home_text) {
6563                 print "<div class=\"index_include\">\n";
6564                 insert_file($home_text);
6565                 print "</div>\n";
6566         }
6567         git_project_search_form($searchtext, $search_use_regexp);
6568         if ($frontpage_no_project_list) {
6569                 my $show_ctags = gitweb_check_feature('ctags');
6570                 if ($frontpage_no_project_list == 1 and $show_ctags) {
6571                         my @projects = git_get_projects_list($project_filter, $strict_export);
6572                         @projects = filter_forks_from_projects_list(\@projects) if gitweb_check_feature('forks');
6573                         @projects = fill_project_list_info(\@projects, 'ctags');
6574                         my $ctags = git_gather_all_ctags(\@projects);
6575                         my $cloud = git_populate_project_tagcloud($ctags, 'project_list');
6576                         print git_show_project_tagcloud($cloud, 64);
6577                 }
6578         } else {
6579                 git_project_list_body($projlist, $order);
6580         }
6581         git_footer_html();
6582 }
6583
6584 sub git_project_list {
6585         my ($projlist, $order) = git_project_list_load();
6586         git_header_html();
6587         if (!$frontpage_no_project_list && defined $home_text && -f $home_text) {
6588                 print "<div class=\"index_include\">\n";
6589                 insert_file($home_text);
6590                 print "</div>\n";
6591         }
6592         git_project_search_form();
6593         git_project_list_body($projlist, $order);
6594         git_footer_html();
6595 }
6596
6597 sub git_forks {
6598         my $order = $input_params{'order'};
6599         if (defined $order && $order !~ m/none|project|descr|owner|age/) {
6600                 die_error(400, "Unknown order parameter");
6601         }
6602
6603         my $filter = $project;
6604         $filter =~ s/\.git$//;
6605         my @list = git_get_projects_list($filter);
6606         if (!@list) {
6607                 die_error(404, "No forks found");
6608         }
6609
6610         git_header_html();
6611         git_print_page_nav('','');
6612         git_print_header_div('summary', "$project forks");
6613         git_project_list_body(\@list, $order, undef, undef, undef, undef, 'forks');
6614         git_footer_html();
6615 }
6616
6617 sub git_project_index {
6618         my @projects = git_get_projects_list($project_filter, $strict_export);
6619         if (!@projects) {
6620                 die_error(404, "No projects found");
6621         }
6622
6623         print $cgi->header(
6624                 -type => 'text/plain',
6625                 -charset => 'utf-8',
6626                 -content_disposition => 'inline; filename="index.aux"');
6627
6628         foreach my $pr (@projects) {
6629                 if (!exists $pr->{'owner'}) {
6630                         $pr->{'owner'} = git_get_project_owner("$pr->{'path'}");
6631                 }
6632
6633                 my ($path, $owner) = ($pr->{'path'}, $pr->{'owner'});
6634                 # quote as in CGI::Util::encode, but keep the slash, and use '+' for ' '
6635                 $path  =~ s/([^a-zA-Z0-9_.\-\/ ])/sprintf("%%%02X", ord($1))/eg;
6636                 $owner =~ s/([^a-zA-Z0-9_.\-\/ ])/sprintf("%%%02X", ord($1))/eg;
6637                 $path  =~ s/ /\+/g;
6638                 $owner =~ s/ /\+/g;
6639
6640                 print "$path $owner\n";
6641         }
6642 }
6643
6644 sub git_summary {
6645         my $descr = git_get_project_description($project) || "none";
6646         my %co = parse_commit("HEAD");
6647         my %cd = %co ? parse_date($co{'committer_epoch'}, $co{'committer_tz'}) : ();
6648         my $head = $co{'id'};
6649         my $remote_heads = gitweb_check_feature('remote_heads');
6650
6651         my $owner = git_get_project_owner($project);
6652
6653         my $refs = git_get_references();
6654         # These get_*_list functions return one more to allow us to see if
6655         # there are more ...
6656         my @taglist  = git_get_tags_list(16);
6657         my @headlist = git_get_heads_list(16);
6658         my %remotedata = $remote_heads ? git_get_remotes_list() : ();
6659         my @forklist;
6660         my $check_forks = gitweb_check_feature('forks');
6661
6662         if ($check_forks) {
6663                 # find forks of a project
6664                 my $filter = $project;
6665                 $filter =~ s/\.git$//;
6666                 @forklist = git_get_projects_list($filter);
6667                 # filter out forks of forks
6668                 @forklist = filter_forks_from_projects_list(\@forklist)
6669                         if (@forklist);
6670         }
6671
6672         git_header_html();
6673         git_print_page_nav('summary','', $head);
6674
6675         print "<div class=\"title\">&nbsp;</div>\n";
6676         print "<table class=\"projects_list\">\n" .
6677               "<tr id=\"metadata_desc\"><td>description</td><td>" . esc_html($descr) . "</td></tr>\n";
6678         if ($owner and not $omit_owner) {
6679                 print  "<tr id=\"metadata_owner\"><td>owner</td><td>" . esc_html($owner) . "</td></tr>\n";
6680         }
6681         if (defined $cd{'rfc2822'}) {
6682                 print "<tr id=\"metadata_lchange\"><td>last change</td>" .
6683                       "<td>".format_timestamp_html(\%cd)."</td></tr>\n";
6684         }
6685
6686         # use per project git URL list in $projectroot/$project/cloneurl
6687         # or make project git URL from git base URL and project name
6688         my $url_tag = "URL";
6689         my @url_list = git_get_project_url_list($project);
6690         @url_list = map { "$_/$project" } @git_base_url_list unless @url_list;
6691         foreach my $git_url (@url_list) {
6692                 next unless $git_url;
6693                 print format_repo_url($url_tag, $git_url);
6694                 $url_tag = "";
6695         }
6696
6697         # Tag cloud
6698         my $show_ctags = gitweb_check_feature('ctags');
6699         if ($show_ctags) {
6700                 my $ctags = git_get_project_ctags($project);
6701                 if (%$ctags || $show_ctags !~ /^\d+$/) {
6702                         # without ability to add tags, don't show if there are none
6703                         my $cloud = git_populate_project_tagcloud($ctags, 'project_list');
6704                         print "<tr id=\"metadata_ctags\">" .
6705                               "<td style=\"vertical-align:middle\">content&#160;tags<br />";
6706                         print "</td>\n<td>" unless %$ctags;
6707                         print "<form action=\"$show_ctags\" method=\"post\" style=\"white-space:nowrap\">" .
6708                               "<input type=\"hidden\" name=\"p\" value=\"$project\"/>" .
6709                               "add: <input type=\"text\" name=\"t\" size=\"8\" /></form>"
6710                               unless $show_ctags =~ /^\d+$/;
6711                         print "</td>\n<td>" if %$ctags;
6712                         print git_show_project_tagcloud($cloud, 48)."</td>" .
6713                               "</tr>\n";
6714                 }
6715         }
6716
6717         print "</table>\n";
6718
6719         # If XSS prevention is on, we don't include README.html.
6720         # TODO: Allow a readme in some safe format.
6721         if (!$prevent_xss && -s "$projectroot/$project/README.html") {
6722                 print "<div class=\"title\">readme</div>\n" .
6723                       "<div class=\"readme\">\n";
6724                 insert_file("$projectroot/$project/README.html");
6725                 print "\n</div>\n"; # class="readme"
6726         }
6727
6728         # we need to request one more than 16 (0..15) to check if
6729         # those 16 are all
6730         my @commitlist = $head ? parse_commits($head, 17) : ();
6731         if (@commitlist) {
6732                 git_print_header_div('shortlog');
6733                 git_shortlog_body(\@commitlist, 0, 15, $refs,
6734                                   $#commitlist <=  15 ? undef :
6735                                   $cgi->a({-href => href(action=>"shortlog")}, "..."));
6736         }
6737
6738         if (@taglist) {
6739                 git_print_header_div('tags');
6740                 git_tags_body(\@taglist, 0, 15,
6741                               $#taglist <=  15 ? undef :
6742                               $cgi->a({-href => href(action=>"tags")}, "..."));
6743         }
6744
6745         if (@headlist) {
6746                 git_print_header_div('heads');
6747                 git_heads_body(\@headlist, $head, 0, 15,
6748                                $#headlist <= 15 ? undef :
6749                                $cgi->a({-href => href(action=>"heads")}, "..."));
6750         }
6751
6752         if (%remotedata) {
6753                 git_print_header_div('remotes');
6754                 git_remotes_body(\%remotedata, 15, $head);
6755         }
6756
6757         if (@forklist) {
6758                 git_print_header_div('forks');
6759                 git_project_list_body(\@forklist, 'age', 0, 15,
6760                                       $#forklist <= 15 ? undef :
6761                                       $cgi->a({-href => href(action=>"forks")}, "..."),
6762                                       'no_header', 'forks');
6763         }
6764
6765         git_footer_html();
6766 }
6767
6768 sub git_tag {
6769         my %tag = parse_tag($hash);
6770
6771         if (! %tag) {
6772                 die_error(404, "Unknown tag object");
6773         }
6774
6775         my $head = git_get_head_hash($project);
6776         git_header_html();
6777         git_print_page_nav('','', $head,undef,$head);
6778         git_print_header_div('commit', esc_html($tag{'name'}), $hash);
6779         print "<div class=\"title_text\">\n" .
6780               "<table class=\"object_header\">\n" .
6781               "<tr>\n" .
6782               "<td>object</td>\n" .
6783               "<td>" . $cgi->a({-class => "list", -href => href(action=>$tag{'type'}, hash=>$tag{'object'})},
6784                                $tag{'object'}) . "</td>\n" .
6785               "<td class=\"link\">" . $cgi->a({-href => href(action=>$tag{'type'}, hash=>$tag{'object'})},
6786                                               $tag{'type'}) . "</td>\n" .
6787               "</tr>\n";
6788         if (defined($tag{'author'})) {
6789                 git_print_authorship_rows(\%tag, 'author');
6790         }
6791         print "</table>\n\n" .
6792               "</div>\n";
6793         print "<div class=\"page_body\">";
6794         my $comment = $tag{'comment'};
6795         foreach my $line (@$comment) {
6796                 chomp $line;
6797                 print esc_html($line, -nbsp=>1) . "<br/>\n";
6798         }
6799         print "</div>\n";
6800         git_footer_html();
6801 }
6802
6803 sub git_blame_common {
6804         my $format = shift || 'porcelain';
6805         if ($format eq 'porcelain' && $input_params{'javascript'}) {
6806                 $format = 'incremental';
6807                 $action = 'blame_incremental'; # for page title etc
6808         }
6809
6810         # permissions
6811         gitweb_check_feature('blame')
6812                 or die_error(403, "Blame view not allowed");
6813
6814         # error checking
6815         die_error(400, "No file name given") unless $file_name;
6816         $hash_base ||= git_get_head_hash($project);
6817         die_error(404, "Couldn't find base commit") unless $hash_base;
6818         my %co = parse_commit($hash_base)
6819                 or die_error(404, "Commit not found");
6820         my $ftype = "blob";
6821         if (!defined $hash) {
6822                 $hash = git_get_hash_by_path($hash_base, $file_name, "blob")
6823                         or die_error(404, "Error looking up file");
6824         } else {
6825                 $ftype = git_get_type($hash);
6826                 if ($ftype !~ "blob") {
6827                         die_error(400, "Object is not a blob");
6828                 }
6829         }
6830
6831         my $fd;
6832         if ($format eq 'incremental') {
6833                 # get file contents (as base)
6834                 open $fd, "-|", git_cmd(), 'cat-file', 'blob', $hash
6835                         or die_error(500, "Open git-cat-file failed");
6836         } elsif ($format eq 'data') {
6837                 # run git-blame --incremental
6838                 open $fd, "-|", git_cmd(), "blame", "--incremental",
6839                         $hash_base, "--", $file_name
6840                         or die_error(500, "Open git-blame --incremental failed");
6841         } else {
6842                 # run git-blame --porcelain
6843                 open $fd, "-|", git_cmd(), "blame", '-p',
6844                         $hash_base, '--', $file_name
6845                         or die_error(500, "Open git-blame --porcelain failed");
6846         }
6847         binmode $fd, ':utf8';
6848
6849         # incremental blame data returns early
6850         if ($format eq 'data') {
6851                 print $cgi->header(
6852                         -type=>"text/plain", -charset => "utf-8",
6853                         -status=> "200 OK");
6854                 local $| = 1; # output autoflush
6855                 while (my $line = <$fd>) {
6856                         print to_utf8($line);
6857                 }
6858                 close $fd
6859                         or print "ERROR $!\n";
6860
6861                 print 'END';
6862                 if (defined $t0 && gitweb_check_feature('timed')) {
6863                         print ' '.
6864                               tv_interval($t0, [ gettimeofday() ]).
6865                               ' '.$number_of_git_cmds;
6866                 }
6867                 print "\n";
6868
6869                 return;
6870         }
6871
6872         # page header
6873         git_header_html();
6874         my $formats_nav =
6875                 $cgi->a({-href => href(action=>"blob", -replay=>1)},
6876                         "blob") .
6877                 " | ";
6878         if ($format eq 'incremental') {
6879                 $formats_nav .=
6880                         $cgi->a({-href => href(action=>"blame", javascript=>0, -replay=>1)},
6881                                 "blame") . " (non-incremental)";
6882         } else {
6883                 $formats_nav .=
6884                         $cgi->a({-href => href(action=>"blame_incremental", -replay=>1)},
6885                                 "blame") . " (incremental)";
6886         }
6887         $formats_nav .=
6888                 " | " .
6889                 $cgi->a({-href => href(action=>"history", -replay=>1)},
6890                         "history") .
6891                 " | " .
6892                 $cgi->a({-href => href(action=>$action, file_name=>$file_name)},
6893                         "HEAD");
6894         git_print_page_nav('','', $hash_base,$co{'tree'},$hash_base, $formats_nav);
6895         git_print_header_div('commit', esc_html($co{'title'}), $hash_base);
6896         git_print_page_path($file_name, $ftype, $hash_base);
6897
6898         # page body
6899         if ($format eq 'incremental') {
6900                 print "<noscript>\n<div class=\"error\"><center><b>\n".
6901                       "This page requires JavaScript to run.\n Use ".
6902                       $cgi->a({-href => href(action=>'blame',javascript=>0,-replay=>1)},
6903                               'this page').
6904                       " instead.\n".
6905                       "</b></center></div>\n</noscript>\n";
6906
6907                 print qq!<div id="progress_bar" style="width: 100%; background-color: yellow"></div>\n!;
6908         }
6909
6910         print qq!<div class="page_body">\n!;
6911         print qq!<div id="progress_info">... / ...</div>\n!
6912                 if ($format eq 'incremental');
6913         print qq!<table id="blame_table" class="blame" width="100%">\n!.
6914               #qq!<col width="5.5em" /><col width="2.5em" /><col width="*" />\n!.
6915               qq!<thead>\n!.
6916               qq!<tr><th>Commit</th><th>Line</th><th>Data</th></tr>\n!.
6917               qq!</thead>\n!.
6918               qq!<tbody>\n!;
6919
6920         my @rev_color = qw(light dark);
6921         my $num_colors = scalar(@rev_color);
6922         my $current_color = 0;
6923
6924         if ($format eq 'incremental') {
6925                 my $color_class = $rev_color[$current_color];
6926
6927                 #contents of a file
6928                 my $linenr = 0;
6929         LINE:
6930                 while (my $line = <$fd>) {
6931                         chomp $line;
6932                         $linenr++;
6933
6934                         print qq!<tr id="l$linenr" class="$color_class">!.
6935                               qq!<td class="sha1"><a href=""> </a></td>!.
6936                               qq!<td class="linenr">!.
6937                               qq!<a class="linenr" href="">$linenr</a></td>!;
6938                         print qq!<td class="pre">! . esc_html($line) . "</td>\n";
6939                         print qq!</tr>\n!;
6940                 }
6941
6942         } else { # porcelain, i.e. ordinary blame
6943                 my %metainfo = (); # saves information about commits
6944
6945                 # blame data
6946         LINE:
6947                 while (my $line = <$fd>) {
6948                         chomp $line;
6949                         # the header: <SHA-1> <src lineno> <dst lineno> [<lines in group>]
6950                         # no <lines in group> for subsequent lines in group of lines
6951                         my ($full_rev, $orig_lineno, $lineno, $group_size) =
6952                            ($line =~ /^([0-9a-f]{40}) (\d+) (\d+)(?: (\d+))?$/);
6953                         if (!exists $metainfo{$full_rev}) {
6954                                 $metainfo{$full_rev} = { 'nprevious' => 0 };
6955                         }
6956                         my $meta = $metainfo{$full_rev};
6957                         my $data;
6958                         while ($data = <$fd>) {
6959                                 chomp $data;
6960                                 last if ($data =~ s/^\t//); # contents of line
6961                                 if ($data =~ /^(\S+)(?: (.*))?$/) {
6962                                         $meta->{$1} = $2 unless exists $meta->{$1};
6963                                 }
6964                                 if ($data =~ /^previous /) {
6965                                         $meta->{'nprevious'}++;
6966                                 }
6967                         }
6968                         my $short_rev = substr($full_rev, 0, 8);
6969                         my $author = $meta->{'author'};
6970                         my %date =
6971                                 parse_date($meta->{'author-time'}, $meta->{'author-tz'});
6972                         my $date = $date{'iso-tz'};
6973                         if ($group_size) {
6974                                 $current_color = ($current_color + 1) % $num_colors;
6975                         }
6976                         my $tr_class = $rev_color[$current_color];
6977                         $tr_class .= ' boundary' if (exists $meta->{'boundary'});
6978                         $tr_class .= ' no-previous' if ($meta->{'nprevious'} == 0);
6979                         $tr_class .= ' multiple-previous' if ($meta->{'nprevious'} > 1);
6980                         print "<tr id=\"l$lineno\" class=\"$tr_class\">\n";
6981                         if ($group_size) {
6982                                 print "<td class=\"sha1\"";
6983                                 print " title=\"". esc_html($author) . ", $date\"";
6984                                 print " rowspan=\"$group_size\"" if ($group_size > 1);
6985                                 print ">";
6986                                 print $cgi->a({-href => href(action=>"commit",
6987                                                              hash=>$full_rev,
6988                                                              file_name=>$file_name)},
6989                                               esc_html($short_rev));
6990                                 if ($group_size >= 2) {
6991                                         my @author_initials = ($author =~ /\b([[:upper:]])\B/g);
6992                                         if (@author_initials) {
6993                                                 print "<br />" .
6994                                                       esc_html(join('', @author_initials));
6995                                                 #           or join('.', ...)
6996                                         }
6997                                 }
6998                                 print "</td>\n";
6999                         }
7000                         # 'previous' <sha1 of parent commit> <filename at commit>
7001                         if (exists $meta->{'previous'} &&
7002                             $meta->{'previous'} =~ /^([a-fA-F0-9]{40}) (.*)$/) {
7003                                 $meta->{'parent'} = $1;
7004                                 $meta->{'file_parent'} = unquote($2);
7005                         }
7006                         my $linenr_commit =
7007                                 exists($meta->{'parent'}) ?
7008                                 $meta->{'parent'} : $full_rev;
7009                         my $linenr_filename =
7010                                 exists($meta->{'file_parent'}) ?
7011                                 $meta->{'file_parent'} : unquote($meta->{'filename'});
7012                         my $blamed = href(action => 'blame',
7013                                           file_name => $linenr_filename,
7014                                           hash_base => $linenr_commit);
7015                         print "<td class=\"linenr\">";
7016                         print $cgi->a({ -href => "$blamed#l$orig_lineno",
7017                                         -class => "linenr" },
7018                                       esc_html($lineno));
7019                         print "</td>";
7020                         print "<td class=\"pre\">" . esc_html($data) . "</td>\n";
7021                         print "</tr>\n";
7022                 } # end while
7023
7024         }
7025
7026         # footer
7027         print "</tbody>\n".
7028               "</table>\n"; # class="blame"
7029         print "</div>\n";   # class="blame_body"
7030         close $fd
7031                 or print "Reading blob failed\n";
7032
7033         git_footer_html();
7034 }
7035
7036 sub git_blame {
7037         git_blame_common();
7038 }
7039
7040 sub git_blame_incremental {
7041         git_blame_common('incremental');
7042 }
7043
7044 sub git_blame_data {
7045         git_blame_common('data');
7046 }
7047
7048 sub git_tags {
7049         my $head = git_get_head_hash($project);
7050         git_header_html();
7051         git_print_page_nav('','', $head,undef,$head,format_ref_views('tags'));
7052         git_print_header_div('summary', $project);
7053
7054         my @tagslist = git_get_tags_list();
7055         if (@tagslist) {
7056                 git_tags_body(\@tagslist);
7057         }
7058         git_footer_html();
7059 }
7060
7061 sub git_heads {
7062         my $head = git_get_head_hash($project);
7063         git_header_html();
7064         git_print_page_nav('','', $head,undef,$head,format_ref_views('heads'));
7065         git_print_header_div('summary', $project);
7066
7067         my @headslist = git_get_heads_list();
7068         if (@headslist) {
7069                 git_heads_body(\@headslist, $head);
7070         }
7071         git_footer_html();
7072 }
7073
7074 # used both for single remote view and for list of all the remotes
7075 sub git_remotes {
7076         gitweb_check_feature('remote_heads')
7077                 or die_error(403, "Remote heads view is disabled");
7078
7079         my $head = git_get_head_hash($project);
7080         my $remote = $input_params{'hash'};
7081
7082         my $remotedata = git_get_remotes_list($remote);
7083         die_error(500, "Unable to get remote information") unless defined $remotedata;
7084
7085         unless (%$remotedata) {
7086                 die_error(404, defined $remote ?
7087                         "Remote $remote not found" :
7088                         "No remotes found");
7089         }
7090
7091         git_header_html(undef, undef, -action_extra => $remote);
7092         git_print_page_nav('', '',  $head, undef, $head,
7093                 format_ref_views($remote ? '' : 'remotes'));
7094
7095         fill_remote_heads($remotedata);
7096         if (defined $remote) {
7097                 git_print_header_div('remotes', "$remote remote for $project");
7098                 git_remote_block($remote, $remotedata->{$remote}, undef, $head);
7099         } else {
7100                 git_print_header_div('summary', "$project remotes");
7101                 git_remotes_body($remotedata, undef, $head);
7102         }
7103
7104         git_footer_html();
7105 }
7106
7107 sub git_blob_plain {
7108         my $type = shift;
7109         my $expires;
7110
7111         if (!defined $hash) {
7112                 if (defined $file_name) {
7113                         my $base = $hash_base || git_get_head_hash($project);
7114                         $hash = git_get_hash_by_path($base, $file_name, "blob")
7115                                 or die_error(404, "Cannot find file");
7116                 } else {
7117                         die_error(400, "No file name defined");
7118                 }
7119         } elsif ($hash =~ m/^[0-9a-fA-F]{40}$/) {
7120                 # blobs defined by non-textual hash id's can be cached
7121                 $expires = "+1d";
7122         }
7123
7124         open my $fd, "-|", git_cmd(), "cat-file", "blob", $hash
7125                 or die_error(500, "Open git-cat-file blob '$hash' failed");
7126
7127         # content-type (can include charset)
7128         $type = blob_contenttype($fd, $file_name, $type);
7129
7130         # "save as" filename, even when no $file_name is given
7131         my $save_as = "$hash";
7132         if (defined $file_name) {
7133                 $save_as = $file_name;
7134         } elsif ($type =~ m/^text\//) {
7135                 $save_as .= '.txt';
7136         }
7137
7138         # With XSS prevention on, blobs of all types except a few known safe
7139         # ones are served with "Content-Disposition: attachment" to make sure
7140         # they don't run in our security domain.  For certain image types,
7141         # blob view writes an <img> tag referring to blob_plain view, and we
7142         # want to be sure not to break that by serving the image as an
7143         # attachment (though Firefox 3 doesn't seem to care).
7144         my $sandbox = $prevent_xss &&
7145                 $type !~ m!^(?:text/[a-z]+|image/(?:gif|png|jpeg))(?:[ ;]|$)!;
7146
7147         # serve text/* as text/plain
7148         if ($prevent_xss &&
7149             ($type =~ m!^text/[a-z]+\b(.*)$! ||
7150              ($type =~ m!^[a-z]+/[a-z]\+xml\b(.*)$! && -T $fd))) {
7151                 my $rest = $1;
7152                 $rest = defined $rest ? $rest : '';
7153                 $type = "text/plain$rest";
7154         }
7155
7156         print $cgi->header(
7157                 -type => $type,
7158                 -expires => $expires,
7159                 -content_disposition =>
7160                         ($sandbox ? 'attachment' : 'inline')
7161                         . '; filename="' . $save_as . '"');
7162         local $/ = undef;
7163         binmode STDOUT, ':raw';
7164         print <$fd>;
7165         binmode STDOUT, ':utf8'; # as set at the beginning of gitweb.cgi
7166         close $fd;
7167 }
7168
7169 sub git_blob {
7170         my $expires;
7171
7172         if (!defined $hash) {
7173                 if (defined $file_name) {
7174                         my $base = $hash_base || git_get_head_hash($project);
7175                         $hash = git_get_hash_by_path($base, $file_name, "blob")
7176                                 or die_error(404, "Cannot find file");
7177                 } else {
7178                         die_error(400, "No file name defined");
7179                 }
7180         } elsif ($hash =~ m/^[0-9a-fA-F]{40}$/) {
7181                 # blobs defined by non-textual hash id's can be cached
7182                 $expires = "+1d";
7183         }
7184
7185         my $have_blame = gitweb_check_feature('blame');
7186         open my $fd, "-|", git_cmd(), "cat-file", "blob", $hash
7187                 or die_error(500, "Couldn't cat $file_name, $hash");
7188         my $mimetype = blob_mimetype($fd, $file_name);
7189         # use 'blob_plain' (aka 'raw') view for files that cannot be displayed
7190         if ($mimetype !~ m!^(?:text/|image/(?:gif|png|jpeg)$)! && -B $fd) {
7191                 close $fd;
7192                 return git_blob_plain($mimetype);
7193         }
7194         # we can have blame only for text/* mimetype
7195         $have_blame &&= ($mimetype =~ m!^text/!);
7196
7197         my $highlight = gitweb_check_feature('highlight');
7198         my $syntax = guess_file_syntax($highlight, $mimetype, $file_name);
7199         $fd = run_highlighter($fd, $highlight, $syntax)
7200                 if $syntax;
7201
7202         git_header_html(undef, $expires);
7203         my $formats_nav = '';
7204         if (defined $hash_base && (my %co = parse_commit($hash_base))) {
7205                 if (defined $file_name) {
7206                         if ($have_blame) {
7207                                 $formats_nav .=
7208                                         $cgi->a({-href => href(action=>"blame", -replay=>1)},
7209                                                 "blame") .
7210                                         " | ";
7211                         }
7212                         $formats_nav .=
7213                                 $cgi->a({-href => href(action=>"history", -replay=>1)},
7214                                         "history") .
7215                                 " | " .
7216                                 $cgi->a({-href => href(action=>"blob_plain", -replay=>1)},
7217                                         "raw") .
7218                                 " | " .
7219                                 $cgi->a({-href => href(action=>"blob",
7220                                                        hash_base=>"HEAD", file_name=>$file_name)},
7221                                         "HEAD");
7222                 } else {
7223                         $formats_nav .=
7224                                 $cgi->a({-href => href(action=>"blob_plain", -replay=>1)},
7225                                         "raw");
7226                 }
7227                 git_print_page_nav('','', $hash_base,$co{'tree'},$hash_base, $formats_nav);
7228                 git_print_header_div('commit', esc_html($co{'title'}), $hash_base);
7229         } else {
7230                 print "<div class=\"page_nav\">\n" .
7231                       "<br/><br/></div>\n" .
7232                       "<div class=\"title\">".esc_html($hash)."</div>\n";
7233         }
7234         git_print_page_path($file_name, "blob", $hash_base);
7235         print "<div class=\"page_body\">\n";
7236         if ($mimetype =~ m!^image/!) {
7237                 print qq!<img class="blob" type="!.esc_attr($mimetype).qq!"!;
7238                 if ($file_name) {
7239                         print qq! alt="!.esc_attr($file_name).qq!" title="!.esc_attr($file_name).qq!"!;
7240                 }
7241                 print qq! src="! .
7242                       href(action=>"blob_plain", hash=>$hash,
7243                            hash_base=>$hash_base, file_name=>$file_name) .
7244                       qq!" />\n!;
7245         } else {
7246                 my $nr;
7247                 while (my $line = <$fd>) {
7248                         chomp $line;
7249                         $nr++;
7250                         $line = untabify($line);
7251                         printf qq!<div class="pre"><a id="l%i" href="%s#l%i" class="linenr">%4i</a> %s</div>\n!,
7252                                $nr, esc_attr(href(-replay => 1)), $nr, $nr,
7253                                $syntax ? sanitize($line) : esc_html($line, -nbsp=>1);
7254                 }
7255         }
7256         close $fd
7257                 or print "Reading blob failed.\n";
7258         print "</div>";
7259         git_footer_html();
7260 }
7261
7262 sub git_tree {
7263         if (!defined $hash_base) {
7264                 $hash_base = "HEAD";
7265         }
7266         if (!defined $hash) {
7267                 if (defined $file_name) {
7268                         $hash = git_get_hash_by_path($hash_base, $file_name, "tree");
7269                 } else {
7270                         $hash = $hash_base;
7271                 }
7272         }
7273         die_error(404, "No such tree") unless defined($hash);
7274
7275         my $show_sizes = gitweb_check_feature('show-sizes');
7276         my $have_blame = gitweb_check_feature('blame');
7277
7278         my @entries = ();
7279         {
7280                 local $/ = "\0";
7281                 open my $fd, "-|", git_cmd(), "ls-tree", '-z',
7282                         ($show_sizes ? '-l' : ()), @extra_options, $hash
7283                         or die_error(500, "Open git-ls-tree failed");
7284                 @entries = map { chomp; $_ } <$fd>;
7285                 close $fd
7286                         or die_error(404, "Reading tree failed");
7287         }
7288
7289         my $refs = git_get_references();
7290         my $ref = format_ref_marker($refs, $hash_base);
7291         git_header_html();
7292         my $basedir = '';
7293         if (defined $hash_base && (my %co = parse_commit($hash_base))) {
7294                 my @views_nav = ();
7295                 if (defined $file_name) {
7296                         push @views_nav,
7297                                 $cgi->a({-href => href(action=>"history", -replay=>1)},
7298                                         "history"),
7299                                 $cgi->a({-href => href(action=>"tree",
7300                                                        hash_base=>"HEAD", file_name=>$file_name)},
7301                                         "HEAD"),
7302                 }
7303                 my $snapshot_links = format_snapshot_links($hash);
7304                 if (defined $snapshot_links) {
7305                         # FIXME: Should be available when we have no hash base as well.
7306                         push @views_nav, $snapshot_links;
7307                 }
7308                 git_print_page_nav('tree','', $hash_base, undef, undef,
7309                                    join(' | ', @views_nav));
7310                 git_print_header_div('commit', esc_html($co{'title'}) . $ref, $hash_base);
7311         } else {
7312                 undef $hash_base;
7313                 print "<div class=\"page_nav\">\n";
7314                 print "<br/><br/></div>\n";
7315                 print "<div class=\"title\">".esc_html($hash)."</div>\n";
7316         }
7317         if (defined $file_name) {
7318                 $basedir = $file_name;
7319                 if ($basedir ne '' && substr($basedir, -1) ne '/') {
7320                         $basedir .= '/';
7321                 }
7322                 git_print_page_path($file_name, 'tree', $hash_base);
7323         }
7324         print "<div class=\"page_body\">\n";
7325         print "<table class=\"tree\">\n";
7326         my $alternate = 1;
7327         # '..' (top directory) link if possible
7328         if (defined $hash_base &&
7329             defined $file_name && $file_name =~ m![^/]+$!) {
7330                 if ($alternate) {
7331                         print "<tr class=\"dark\">\n";
7332                 } else {
7333                         print "<tr class=\"light\">\n";
7334                 }
7335                 $alternate ^= 1;
7336
7337                 my $up = $file_name;
7338                 $up =~ s!/?[^/]+$!!;
7339                 undef $up unless $up;
7340                 # based on git_print_tree_entry
7341                 print '<td class="mode">' . mode_str('040000') . "</td>\n";
7342                 print '<td class="size">&nbsp;</td>'."\n" if $show_sizes;
7343                 print '<td class="list">';
7344                 print $cgi->a({-href => href(action=>"tree",
7345                                              hash_base=>$hash_base,
7346                                              file_name=>$up)},
7347                               "..");
7348                 print "</td>\n";
7349                 print "<td class=\"link\"></td>\n";
7350
7351                 print "</tr>\n";
7352         }
7353         foreach my $line (@entries) {
7354                 my %t = parse_ls_tree_line($line, -z => 1, -l => $show_sizes);
7355
7356                 if ($alternate) {
7357                         print "<tr class=\"dark\">\n";
7358                 } else {
7359                         print "<tr class=\"light\">\n";
7360                 }
7361                 $alternate ^= 1;
7362
7363                 git_print_tree_entry(\%t, $basedir, $hash_base, $have_blame);
7364
7365                 print "</tr>\n";
7366         }
7367         print "</table>\n" .
7368               "</div>";
7369         git_footer_html();
7370 }
7371
7372 sub sanitize_for_filename {
7373     my $name = shift;
7374
7375     $name =~ s!/!-!g;
7376     $name =~ s/[^[:alnum:]_.-]//g;
7377
7378     return $name;
7379 }
7380
7381 sub snapshot_name {
7382         my ($project, $hash) = @_;
7383
7384         # path/to/project.git  -> project
7385         # path/to/project/.git -> project
7386         my $name = to_utf8($project);
7387         $name =~ s,([^/])/*\.git$,$1,;
7388         $name = sanitize_for_filename(basename($name));
7389
7390         my $ver = $hash;
7391         if ($hash =~ /^[0-9a-fA-F]+$/) {
7392                 # shorten SHA-1 hash
7393                 my $full_hash = git_get_full_hash($project, $hash);
7394                 if ($full_hash =~ /^$hash/ && length($hash) > 7) {
7395                         $ver = git_get_short_hash($project, $hash);
7396                 }
7397         } elsif ($hash =~ m!^refs/tags/(.*)$!) {
7398                 # tags don't need shortened SHA-1 hash
7399                 $ver = $1;
7400         } else {
7401                 # branches and other need shortened SHA-1 hash
7402                 my $strip_refs = join '|', map { quotemeta } get_branch_refs();
7403                 if ($hash =~ m!^refs/($strip_refs|remotes)/(.*)$!) {
7404                         my $ref_dir = (defined $1) ? $1 : '';
7405                         $ver = $2;
7406
7407                         $ref_dir = sanitize_for_filename($ref_dir);
7408                         # for refs neither in heads nor remotes we want to
7409                         # add a ref dir to archive name
7410                         if ($ref_dir ne '' and $ref_dir ne 'heads' and $ref_dir ne 'remotes') {
7411                                 $ver = $ref_dir . '-' . $ver;
7412                         }
7413                 }
7414                 $ver .= '-' . git_get_short_hash($project, $hash);
7415         }
7416         # special case of sanitization for filename - we change
7417         # slashes to dots instead of dashes
7418         # in case of hierarchical branch names
7419         $ver =~ s!/!.!g;
7420         $ver =~ s/[^[:alnum:]_.-]//g;
7421
7422         # name = project-version_string
7423         $name = "$name-$ver";
7424
7425         return wantarray ? ($name, $name) : $name;
7426 }
7427
7428 sub exit_if_unmodified_since {
7429         my ($latest_epoch) = @_;
7430         our $cgi;
7431
7432         my $if_modified = $cgi->http('IF_MODIFIED_SINCE');
7433         if (defined $if_modified) {
7434                 my $since;
7435                 if (eval { require HTTP::Date; 1; }) {
7436                         $since = HTTP::Date::str2time($if_modified);
7437                 } elsif (eval { require Time::ParseDate; 1; }) {
7438                         $since = Time::ParseDate::parsedate($if_modified, GMT => 1);
7439                 }
7440                 if (defined $since && $latest_epoch <= $since) {
7441                         my %latest_date = parse_date($latest_epoch);
7442                         print $cgi->header(
7443                                 -last_modified => $latest_date{'rfc2822'},
7444                                 -status => '304 Not Modified');
7445                         CORE::die;
7446                 }
7447         }
7448 }
7449
7450 sub git_snapshot {
7451         my $format = $input_params{'snapshot_format'};
7452         if (!@snapshot_fmts) {
7453                 die_error(403, "Snapshots not allowed");
7454         }
7455         # default to first supported snapshot format
7456         $format ||= $snapshot_fmts[0];
7457         if ($format !~ m/^[a-z0-9]+$/) {
7458                 die_error(400, "Invalid snapshot format parameter");
7459         } elsif (!exists($known_snapshot_formats{$format})) {
7460                 die_error(400, "Unknown snapshot format");
7461         } elsif ($known_snapshot_formats{$format}{'disabled'}) {
7462                 die_error(403, "Snapshot format not allowed");
7463         } elsif (!grep($_ eq $format, @snapshot_fmts)) {
7464                 die_error(403, "Unsupported snapshot format");
7465         }
7466
7467         my $type = git_get_type("$hash^{}");
7468         if (!$type) {
7469                 die_error(404, 'Object does not exist');
7470         }  elsif ($type eq 'blob') {
7471                 die_error(400, 'Object is not a tree-ish');
7472         }
7473
7474         my ($name, $prefix) = snapshot_name($project, $hash);
7475         my $filename = "$name$known_snapshot_formats{$format}{'suffix'}";
7476
7477         my %co = parse_commit($hash);
7478         exit_if_unmodified_since($co{'committer_epoch'}) if %co;
7479
7480         my $cmd = quote_command(
7481                 git_cmd(), 'archive',
7482                 "--format=$known_snapshot_formats{$format}{'format'}",
7483                 "--prefix=$prefix/", $hash);
7484         if (exists $known_snapshot_formats{$format}{'compressor'}) {
7485                 $cmd .= ' | ' . quote_command(@{$known_snapshot_formats{$format}{'compressor'}});
7486         }
7487
7488         $filename =~ s/(["\\])/\\$1/g;
7489         my %latest_date;
7490         if (%co) {
7491                 %latest_date = parse_date($co{'committer_epoch'}, $co{'committer_tz'});
7492         }
7493
7494         print $cgi->header(
7495                 -type => $known_snapshot_formats{$format}{'type'},
7496                 -content_disposition => 'inline; filename="' . $filename . '"',
7497                 %co ? (-last_modified => $latest_date{'rfc2822'}) : (),
7498                 -status => '200 OK');
7499
7500         open my $fd, "-|", $cmd
7501                 or die_error(500, "Execute git-archive failed");
7502         binmode STDOUT, ':raw';
7503         print <$fd>;
7504         binmode STDOUT, ':utf8'; # as set at the beginning of gitweb.cgi
7505         close $fd;
7506 }
7507
7508 sub git_log_generic {
7509         my ($fmt_name, $body_subr, $base, $parent, $file_name, $file_hash) = @_;
7510
7511         my $head = git_get_head_hash($project);
7512         if (!defined $base) {
7513                 $base = $head;
7514         }
7515         if (!defined $page) {
7516                 $page = 0;
7517         }
7518         my $refs = git_get_references();
7519
7520         my $commit_hash = $base;
7521         if (defined $parent) {
7522                 $commit_hash = "$parent..$base";
7523         }
7524         my @commitlist =
7525                 parse_commits($commit_hash, 101, (100 * $page),
7526                               defined $file_name ? ($file_name, "--full-history") : ());
7527
7528         my $ftype;
7529         if (!defined $file_hash && defined $file_name) {
7530                 # some commits could have deleted file in question,
7531                 # and not have it in tree, but one of them has to have it
7532                 for (my $i = 0; $i < @commitlist; $i++) {
7533                         $file_hash = git_get_hash_by_path($commitlist[$i]{'id'}, $file_name);
7534                         last if defined $file_hash;
7535                 }
7536         }
7537         if (defined $file_hash) {
7538                 $ftype = git_get_type($file_hash);
7539         }
7540         if (defined $file_name && !defined $ftype) {
7541                 die_error(500, "Unknown type of object");
7542         }
7543         my %co;
7544         if (defined $file_name) {
7545                 %co = parse_commit($base)
7546                         or die_error(404, "Unknown commit object");
7547         }
7548
7549
7550         my $paging_nav = format_paging_nav($fmt_name, $page, $#commitlist >= 100);
7551         my $next_link = '';
7552         if ($#commitlist >= 100) {
7553                 $next_link =
7554                         $cgi->a({-href => href(-replay=>1, page=>$page+1),
7555                                  -accesskey => "n", -title => "Alt-n"}, "next");
7556         }
7557         my $patch_max = gitweb_get_feature('patches');
7558         if ($patch_max && !defined $file_name) {
7559                 if ($patch_max < 0 || @commitlist <= $patch_max) {
7560                         $paging_nav .= " &sdot; " .
7561                                 $cgi->a({-href => href(action=>"patches", -replay=>1)},
7562                                         "patches");
7563                 }
7564         }
7565
7566         git_header_html();
7567         git_print_page_nav($fmt_name,'', $hash,$hash,$hash, $paging_nav);
7568         if (defined $file_name) {
7569                 git_print_header_div('commit', esc_html($co{'title'}), $base);
7570         } else {
7571                 git_print_header_div('summary', $project)
7572         }
7573         git_print_page_path($file_name, $ftype, $hash_base)
7574                 if (defined $file_name);
7575
7576         $body_subr->(\@commitlist, 0, 99, $refs, $next_link,
7577                      $file_name, $file_hash, $ftype);
7578
7579         git_footer_html();
7580 }
7581
7582 sub git_log {
7583         git_log_generic('log', \&git_log_body,
7584                         $hash, $hash_parent);
7585 }
7586
7587 sub git_commit {
7588         $hash ||= $hash_base || "HEAD";
7589         my %co = parse_commit($hash)
7590             or die_error(404, "Unknown commit object");
7591
7592         my $parent  = $co{'parent'};
7593         my $parents = $co{'parents'}; # listref
7594
7595         # we need to prepare $formats_nav before any parameter munging
7596         my $formats_nav;
7597         if (!defined $parent) {
7598                 # --root commitdiff
7599                 $formats_nav .= '(initial)';
7600         } elsif (@$parents == 1) {
7601                 # single parent commit
7602                 $formats_nav .=
7603                         '(parent: ' .
7604                         $cgi->a({-href => href(action=>"commit",
7605                                                hash=>$parent)},
7606                                 esc_html(substr($parent, 0, 7))) .
7607                         ')';
7608         } else {
7609                 # merge commit
7610                 $formats_nav .=
7611                         '(merge: ' .
7612                         join(' ', map {
7613                                 $cgi->a({-href => href(action=>"commit",
7614                                                        hash=>$_)},
7615                                         esc_html(substr($_, 0, 7)));
7616                         } @$parents ) .
7617                         ')';
7618         }
7619         if (gitweb_check_feature('patches') && @$parents <= 1) {
7620                 $formats_nav .= " | " .
7621                         $cgi->a({-href => href(action=>"patch", -replay=>1)},
7622                                 "patch");
7623         }
7624
7625         if (!defined $parent) {
7626                 $parent = "--root";
7627         }
7628         my @difftree;
7629         open my $fd, "-|", git_cmd(), "diff-tree", '-r', "--no-commit-id",
7630                 @diff_opts,
7631                 (@$parents <= 1 ? $parent : '-c'),
7632                 $hash, "--"
7633                 or die_error(500, "Open git-diff-tree failed");
7634         @difftree = map { chomp; $_ } <$fd>;
7635         close $fd or die_error(404, "Reading git-diff-tree failed");
7636
7637         # non-textual hash id's can be cached
7638         my $expires;
7639         if ($hash =~ m/^[0-9a-fA-F]{40}$/) {
7640                 $expires = "+1d";
7641         }
7642         my $refs = git_get_references();
7643         my $ref = format_ref_marker($refs, $co{'id'});
7644
7645         git_header_html(undef, $expires);
7646         git_print_page_nav('commit', '',
7647                            $hash, $co{'tree'}, $hash,
7648                            $formats_nav);
7649
7650         if (defined $co{'parent'}) {
7651                 git_print_header_div('commitdiff', esc_html($co{'title'}) . $ref, $hash);
7652         } else {
7653                 git_print_header_div('tree', esc_html($co{'title'}) . $ref, $co{'tree'}, $hash);
7654         }
7655         print "<div class=\"title_text\">\n" .
7656               "<table class=\"object_header\">\n";
7657         git_print_authorship_rows(\%co);
7658         print "<tr><td>commit</td><td class=\"sha1\">$co{'id'}</td></tr>\n";
7659         print "<tr>" .
7660               "<td>tree</td>" .
7661               "<td class=\"sha1\">" .
7662               $cgi->a({-href => href(action=>"tree", hash=>$co{'tree'}, hash_base=>$hash),
7663                        class => "list"}, $co{'tree'}) .
7664               "</td>" .
7665               "<td class=\"link\">" .
7666               $cgi->a({-href => href(action=>"tree", hash=>$co{'tree'}, hash_base=>$hash)},
7667                       "tree");
7668         my $snapshot_links = format_snapshot_links($hash);
7669         if (defined $snapshot_links) {
7670                 print " | " . $snapshot_links;
7671         }
7672         print "</td>" .
7673               "</tr>\n";
7674
7675         foreach my $par (@$parents) {
7676                 print "<tr>" .
7677                       "<td>parent</td>" .
7678                       "<td class=\"sha1\">" .
7679                       $cgi->a({-href => href(action=>"commit", hash=>$par),
7680                                class => "list"}, $par) .
7681                       "</td>" .
7682                       "<td class=\"link\">" .
7683                       $cgi->a({-href => href(action=>"commit", hash=>$par)}, "commit") .
7684                       " | " .
7685                       $cgi->a({-href => href(action=>"commitdiff", hash=>$hash, hash_parent=>$par)}, "diff") .
7686                       "</td>" .
7687                       "</tr>\n";
7688         }
7689         print "</table>".
7690               "</div>\n";
7691
7692         print "<div class=\"page_body\">\n";
7693         git_print_log($co{'comment'});
7694         print "</div>\n";
7695
7696         git_difftree_body(\@difftree, $hash, @$parents);
7697
7698         git_footer_html();
7699 }
7700
7701 sub git_object {
7702         # object is defined by:
7703         # - hash or hash_base alone
7704         # - hash_base and file_name
7705         my $type;
7706
7707         # - hash or hash_base alone
7708         if ($hash || ($hash_base && !defined $file_name)) {
7709                 my $object_id = $hash || $hash_base;
7710
7711                 open my $fd, "-|", quote_command(
7712                         git_cmd(), 'cat-file', '-t', $object_id) . ' 2> /dev/null'
7713                         or die_error(404, "Object does not exist");
7714                 $type = <$fd>;
7715                 chomp $type;
7716                 close $fd
7717                         or die_error(404, "Object does not exist");
7718
7719         # - hash_base and file_name
7720         } elsif ($hash_base && defined $file_name) {
7721                 $file_name =~ s,/+$,,;
7722
7723                 system(git_cmd(), "cat-file", '-e', $hash_base) == 0
7724                         or die_error(404, "Base object does not exist");
7725
7726                 # here errors should not happen
7727                 open my $fd, "-|", git_cmd(), "ls-tree", $hash_base, "--", $file_name
7728                         or die_error(500, "Open git-ls-tree failed");
7729                 my $line = <$fd>;
7730                 close $fd;
7731
7732                 #'100644 blob 0fa3f3a66fb6a137f6ec2c19351ed4d807070ffa  panic.c'
7733                 unless ($line && $line =~ m/^([0-9]+) (.+) ([0-9a-fA-F]{40})\t/) {
7734                         die_error(404, "File or directory for given base does not exist");
7735                 }
7736                 $type = $2;
7737                 $hash = $3;
7738         } else {
7739                 die_error(400, "Not enough information to find object");
7740         }
7741
7742         print $cgi->redirect(-uri => href(action=>$type, -full=>1,
7743                                           hash=>$hash, hash_base=>$hash_base,
7744                                           file_name=>$file_name),
7745                              -status => '302 Found');
7746 }
7747
7748 sub git_blobdiff {
7749         my $format = shift || 'html';
7750         my $diff_style = $input_params{'diff_style'} || 'inline';
7751
7752         my $fd;
7753         my @difftree;
7754         my %diffinfo;
7755         my $expires;
7756
7757         # preparing $fd and %diffinfo for git_patchset_body
7758         # new style URI
7759         if (defined $hash_base && defined $hash_parent_base) {
7760                 if (defined $file_name) {
7761                         # read raw output
7762                         open $fd, "-|", git_cmd(), "diff-tree", '-r', @diff_opts,
7763                                 $hash_parent_base, $hash_base,
7764                                 "--", (defined $file_parent ? $file_parent : ()), $file_name
7765                                 or die_error(500, "Open git-diff-tree failed");
7766                         @difftree = map { chomp; $_ } <$fd>;
7767                         close $fd
7768                                 or die_error(404, "Reading git-diff-tree failed");
7769                         @difftree
7770                                 or die_error(404, "Blob diff not found");
7771
7772                 } elsif (defined $hash &&
7773                          $hash =~ /[0-9a-fA-F]{40}/) {
7774                         # try to find filename from $hash
7775
7776                         # read filtered raw output
7777                         open $fd, "-|", git_cmd(), "diff-tree", '-r', @diff_opts,
7778                                 $hash_parent_base, $hash_base, "--"
7779                                 or die_error(500, "Open git-diff-tree failed");
7780                         @difftree =
7781                                 # ':100644 100644 03b21826... 3b93d5e7... M     ls-files.c'
7782                                 # $hash == to_id
7783                                 grep { /^:[0-7]{6} [0-7]{6} [0-9a-fA-F]{40} $hash/ }
7784                                 map { chomp; $_ } <$fd>;
7785                         close $fd
7786                                 or die_error(404, "Reading git-diff-tree failed");
7787                         @difftree
7788                                 or die_error(404, "Blob diff not found");
7789
7790                 } else {
7791                         die_error(400, "Missing one of the blob diff parameters");
7792                 }
7793
7794                 if (@difftree > 1) {
7795                         die_error(400, "Ambiguous blob diff specification");
7796                 }
7797
7798                 %diffinfo = parse_difftree_raw_line($difftree[0]);
7799                 $file_parent ||= $diffinfo{'from_file'} || $file_name;
7800                 $file_name   ||= $diffinfo{'to_file'};
7801
7802                 $hash_parent ||= $diffinfo{'from_id'};
7803                 $hash        ||= $diffinfo{'to_id'};
7804
7805                 # non-textual hash id's can be cached
7806                 if ($hash_base =~ m/^[0-9a-fA-F]{40}$/ &&
7807                     $hash_parent_base =~ m/^[0-9a-fA-F]{40}$/) {
7808                         $expires = '+1d';
7809                 }
7810
7811                 # open patch output
7812                 open $fd, "-|", git_cmd(), "diff-tree", '-r', @diff_opts,
7813                         '-p', ($format eq 'html' ? "--full-index" : ()),
7814                         $hash_parent_base, $hash_base,
7815                         "--", (defined $file_parent ? $file_parent : ()), $file_name
7816                         or die_error(500, "Open git-diff-tree failed");
7817         }
7818
7819         # old/legacy style URI -- not generated anymore since 1.4.3.
7820         if (!%diffinfo) {
7821                 die_error('404 Not Found', "Missing one of the blob diff parameters")
7822         }
7823
7824         # header
7825         if ($format eq 'html') {
7826                 my $formats_nav =
7827                         $cgi->a({-href => href(action=>"blobdiff_plain", -replay=>1)},
7828                                 "raw");
7829                 $formats_nav .= diff_style_nav($diff_style);
7830                 git_header_html(undef, $expires);
7831                 if (defined $hash_base && (my %co = parse_commit($hash_base))) {
7832                         git_print_page_nav('','', $hash_base,$co{'tree'},$hash_base, $formats_nav);
7833                         git_print_header_div('commit', esc_html($co{'title'}), $hash_base);
7834                 } else {
7835                         print "<div class=\"page_nav\"><br/>$formats_nav<br/></div>\n";
7836                         print "<div class=\"title\">".esc_html("$hash vs $hash_parent")."</div>\n";
7837                 }
7838                 if (defined $file_name) {
7839                         git_print_page_path($file_name, "blob", $hash_base);
7840                 } else {
7841                         print "<div class=\"page_path\"></div>\n";
7842                 }
7843
7844         } elsif ($format eq 'plain') {
7845                 print $cgi->header(
7846                         -type => 'text/plain',
7847                         -charset => 'utf-8',
7848                         -expires => $expires,
7849                         -content_disposition => 'inline; filename="' . "$file_name" . '.patch"');
7850
7851                 print "X-Git-Url: " . $cgi->self_url() . "\n\n";
7852
7853         } else {
7854                 die_error(400, "Unknown blobdiff format");
7855         }
7856
7857         # patch
7858         if ($format eq 'html') {
7859                 print "<div class=\"page_body\">\n";
7860
7861                 git_patchset_body($fd, $diff_style,
7862                                   [ \%diffinfo ], $hash_base, $hash_parent_base);
7863                 close $fd;
7864
7865                 print "</div>\n"; # class="page_body"
7866                 git_footer_html();
7867
7868         } else {
7869                 while (my $line = <$fd>) {
7870                         $line =~ s!a/($hash|$hash_parent)!'a/'.esc_path($diffinfo{'from_file'})!eg;
7871                         $line =~ s!b/($hash|$hash_parent)!'b/'.esc_path($diffinfo{'to_file'})!eg;
7872
7873                         print $line;
7874
7875                         last if $line =~ m!^\+\+\+!;
7876                 }
7877                 local $/ = undef;
7878                 print <$fd>;
7879                 close $fd;
7880         }
7881 }
7882
7883 sub git_blobdiff_plain {
7884         git_blobdiff('plain');
7885 }
7886
7887 # assumes that it is added as later part of already existing navigation,
7888 # so it returns "| foo | bar" rather than just "foo | bar"
7889 sub diff_style_nav {
7890         my ($diff_style, $is_combined) = @_;
7891         $diff_style ||= 'inline';
7892
7893         return "" if ($is_combined);
7894
7895         my @styles = (inline => 'inline', 'sidebyside' => 'side by side');
7896         my %styles = @styles;
7897         @styles =
7898                 @styles[ map { $_ * 2 } 0..$#styles/2 ];
7899
7900         return join '',
7901                 map { " | ".$_ }
7902                 map {
7903                         $_ eq $diff_style ? $styles{$_} :
7904                         $cgi->a({-href => href(-replay=>1, diff_style => $_)}, $styles{$_})
7905                 } @styles;
7906 }
7907
7908 sub git_commitdiff {
7909         my %params = @_;
7910         my $format = $params{-format} || 'html';
7911         my $diff_style = $input_params{'diff_style'} || 'inline';
7912
7913         my ($patch_max) = gitweb_get_feature('patches');
7914         if ($format eq 'patch') {
7915                 die_error(403, "Patch view not allowed") unless $patch_max;
7916         }
7917
7918         $hash ||= $hash_base || "HEAD";
7919         my %co = parse_commit($hash)
7920             or die_error(404, "Unknown commit object");
7921
7922         # choose format for commitdiff for merge
7923         if (! defined $hash_parent && @{$co{'parents'}} > 1) {
7924                 $hash_parent = '--cc';
7925         }
7926         # we need to prepare $formats_nav before almost any parameter munging
7927         my $formats_nav;
7928         if ($format eq 'html') {
7929                 $formats_nav =
7930                         $cgi->a({-href => href(action=>"commitdiff_plain", -replay=>1)},
7931                                 "raw");
7932                 if ($patch_max && @{$co{'parents'}} <= 1) {
7933                         $formats_nav .= " | " .
7934                                 $cgi->a({-href => href(action=>"patch", -replay=>1)},
7935                                         "patch");
7936                 }
7937                 $formats_nav .= diff_style_nav($diff_style, @{$co{'parents'}} > 1);
7938
7939                 if (defined $hash_parent &&
7940                     $hash_parent ne '-c' && $hash_parent ne '--cc') {
7941                         # commitdiff with two commits given
7942                         my $hash_parent_short = $hash_parent;
7943                         if ($hash_parent =~ m/^[0-9a-fA-F]{40}$/) {
7944                                 $hash_parent_short = substr($hash_parent, 0, 7);
7945                         }
7946                         $formats_nav .=
7947                                 ' (from';
7948                         for (my $i = 0; $i < @{$co{'parents'}}; $i++) {
7949                                 if ($co{'parents'}[$i] eq $hash_parent) {
7950                                         $formats_nav .= ' parent ' . ($i+1);
7951                                         last;
7952                                 }
7953                         }
7954                         $formats_nav .= ': ' .
7955                                 $cgi->a({-href => href(-replay=>1,
7956                                                        hash=>$hash_parent, hash_base=>undef)},
7957                                         esc_html($hash_parent_short)) .
7958                                 ')';
7959                 } elsif (!$co{'parent'}) {
7960                         # --root commitdiff
7961                         $formats_nav .= ' (initial)';
7962                 } elsif (scalar @{$co{'parents'}} == 1) {
7963                         # single parent commit
7964                         $formats_nav .=
7965                                 ' (parent: ' .
7966                                 $cgi->a({-href => href(-replay=>1,
7967                                                        hash=>$co{'parent'}, hash_base=>undef)},
7968                                         esc_html(substr($co{'parent'}, 0, 7))) .
7969                                 ')';
7970                 } else {
7971                         # merge commit
7972                         if ($hash_parent eq '--cc') {
7973                                 $formats_nav .= ' | ' .
7974                                         $cgi->a({-href => href(-replay=>1,
7975                                                                hash=>$hash, hash_parent=>'-c')},
7976                                                 'combined');
7977                         } else { # $hash_parent eq '-c'
7978                                 $formats_nav .= ' | ' .
7979                                         $cgi->a({-href => href(-replay=>1,
7980                                                                hash=>$hash, hash_parent=>'--cc')},
7981                                                 'compact');
7982                         }
7983                         $formats_nav .=
7984                                 ' (merge: ' .
7985                                 join(' ', map {
7986                                         $cgi->a({-href => href(-replay=>1,
7987                                                                hash=>$_, hash_base=>undef)},
7988                                                 esc_html(substr($_, 0, 7)));
7989                                 } @{$co{'parents'}} ) .
7990                                 ')';
7991                 }
7992         }
7993
7994         my $hash_parent_param = $hash_parent;
7995         if (!defined $hash_parent_param) {
7996                 # --cc for multiple parents, --root for parentless
7997                 $hash_parent_param =
7998                         @{$co{'parents'}} > 1 ? '--cc' : $co{'parent'} || '--root';
7999         }
8000
8001         # read commitdiff
8002         my $fd;
8003         my @difftree;
8004         if ($format eq 'html') {
8005                 open $fd, "-|", git_cmd(), "diff-tree", '-r', @diff_opts,
8006                         "--no-commit-id", "--patch-with-raw", "--full-index",
8007                         $hash_parent_param, $hash, "--"
8008                         or die_error(500, "Open git-diff-tree failed");
8009
8010                 while (my $line = <$fd>) {
8011                         chomp $line;
8012                         # empty line ends raw part of diff-tree output
8013                         last unless $line;
8014                         push @difftree, scalar parse_difftree_raw_line($line);
8015                 }
8016
8017         } elsif ($format eq 'plain') {
8018                 open $fd, "-|", git_cmd(), "diff-tree", '-r', @diff_opts,
8019                         '-p', $hash_parent_param, $hash, "--"
8020                         or die_error(500, "Open git-diff-tree failed");
8021         } elsif ($format eq 'patch') {
8022                 # For commit ranges, we limit the output to the number of
8023                 # patches specified in the 'patches' feature.
8024                 # For single commits, we limit the output to a single patch,
8025                 # diverging from the git-format-patch default.
8026                 my @commit_spec = ();
8027                 if ($hash_parent) {
8028                         if ($patch_max > 0) {
8029                                 push @commit_spec, "-$patch_max";
8030                         }
8031                         push @commit_spec, '-n', "$hash_parent..$hash";
8032                 } else {
8033                         if ($params{-single}) {
8034                                 push @commit_spec, '-1';
8035                         } else {
8036                                 if ($patch_max > 0) {
8037                                         push @commit_spec, "-$patch_max";
8038                                 }
8039                                 push @commit_spec, "-n";
8040                         }
8041                         push @commit_spec, '--root', $hash;
8042                 }
8043                 open $fd, "-|", git_cmd(), "format-patch", @diff_opts,
8044                         '--encoding=utf8', '--stdout', @commit_spec
8045                         or die_error(500, "Open git-format-patch failed");
8046         } else {
8047                 die_error(400, "Unknown commitdiff format");
8048         }
8049
8050         # non-textual hash id's can be cached
8051         my $expires;
8052         if ($hash =~ m/^[0-9a-fA-F]{40}$/) {
8053                 $expires = "+1d";
8054         }
8055
8056         # write commit message
8057         if ($format eq 'html') {
8058                 my $refs = git_get_references();
8059                 my $ref = format_ref_marker($refs, $co{'id'});
8060
8061                 git_header_html(undef, $expires);
8062                 git_print_page_nav('commitdiff','', $hash,$co{'tree'},$hash, $formats_nav);
8063                 git_print_header_div('commit', esc_html($co{'title'}) . $ref, $hash);
8064                 print "<div class=\"title_text\">\n" .
8065                       "<table class=\"object_header\">\n";
8066                 git_print_authorship_rows(\%co);
8067                 print "</table>".
8068                       "</div>\n";
8069                 print "<div class=\"page_body\">\n";
8070                 if (@{$co{'comment'}} > 1) {
8071                         print "<div class=\"log\">\n";
8072                         git_print_log($co{'comment'}, -final_empty_line=> 1, -remove_title => 1);
8073                         print "</div>\n"; # class="log"
8074                 }
8075
8076         } elsif ($format eq 'plain') {
8077                 my $refs = git_get_references("tags");
8078                 my $tagname = git_get_rev_name_tags($hash);
8079                 my $filename = basename($project) . "-$hash.patch";
8080
8081                 print $cgi->header(
8082                         -type => 'text/plain',
8083                         -charset => 'utf-8',
8084                         -expires => $expires,
8085                         -content_disposition => 'inline; filename="' . "$filename" . '"');
8086                 my %ad = parse_date($co{'author_epoch'}, $co{'author_tz'});
8087                 print "From: " . to_utf8($co{'author'}) . "\n";
8088                 print "Date: $ad{'rfc2822'} ($ad{'tz_local'})\n";
8089                 print "Subject: " . to_utf8($co{'title'}) . "\n";
8090
8091                 print "X-Git-Tag: $tagname\n" if $tagname;
8092                 print "X-Git-Url: " . $cgi->self_url() . "\n\n";
8093
8094                 foreach my $line (@{$co{'comment'}}) {
8095                         print to_utf8($line) . "\n";
8096                 }
8097                 print "---\n\n";
8098         } elsif ($format eq 'patch') {
8099                 my $filename = basename($project) . "-$hash.patch";
8100
8101                 print $cgi->header(
8102                         -type => 'text/plain',
8103                         -charset => 'utf-8',
8104                         -expires => $expires,
8105                         -content_disposition => 'inline; filename="' . "$filename" . '"');
8106         }
8107
8108         # write patch
8109         if ($format eq 'html') {
8110                 my $use_parents = !defined $hash_parent ||
8111                         $hash_parent eq '-c' || $hash_parent eq '--cc';
8112                 git_difftree_body(\@difftree, $hash,
8113                                   $use_parents ? @{$co{'parents'}} : $hash_parent);
8114                 print "<br/>\n";
8115
8116                 git_patchset_body($fd, $diff_style,
8117                                   \@difftree, $hash,
8118                                   $use_parents ? @{$co{'parents'}} : $hash_parent);
8119                 close $fd;
8120                 print "</div>\n"; # class="page_body"
8121                 git_footer_html();
8122
8123         } elsif ($format eq 'plain') {
8124                 local $/ = undef;
8125                 print <$fd>;
8126                 close $fd
8127                         or print "Reading git-diff-tree failed\n";
8128         } elsif ($format eq 'patch') {
8129                 local $/ = undef;
8130                 print <$fd>;
8131                 close $fd
8132                         or print "Reading git-format-patch failed\n";
8133         }
8134 }
8135
8136 sub git_commitdiff_plain {
8137         git_commitdiff(-format => 'plain');
8138 }
8139
8140 # format-patch-style patches
8141 sub git_patch {
8142         git_commitdiff(-format => 'patch', -single => 1);
8143 }
8144
8145 sub git_patches {
8146         git_commitdiff(-format => 'patch');
8147 }
8148
8149 sub git_history {
8150         git_log_generic('history', \&git_history_body,
8151                         $hash_base, $hash_parent_base,
8152                         $file_name, $hash);
8153 }
8154
8155 sub git_search {
8156         $searchtype ||= 'commit';
8157
8158         # check if appropriate features are enabled
8159         gitweb_check_feature('search')
8160                 or die_error(403, "Search is disabled");
8161         if ($searchtype eq 'pickaxe') {
8162                 # pickaxe may take all resources of your box and run for several minutes
8163                 # with every query - so decide by yourself how public you make this feature
8164                 gitweb_check_feature('pickaxe')
8165                         or die_error(403, "Pickaxe search is disabled");
8166         }
8167         if ($searchtype eq 'grep') {
8168                 # grep search might be potentially CPU-intensive, too
8169                 gitweb_check_feature('grep')
8170                         or die_error(403, "Grep search is disabled");
8171         }
8172
8173         if (!defined $searchtext) {
8174                 die_error(400, "Text field is empty");
8175         }
8176         if (!defined $hash) {
8177                 $hash = git_get_head_hash($project);
8178         }
8179         my %co = parse_commit($hash);
8180         if (!%co) {
8181                 die_error(404, "Unknown commit object");
8182         }
8183         if (!defined $page) {
8184                 $page = 0;
8185         }
8186
8187         if ($searchtype eq 'commit' ||
8188             $searchtype eq 'author' ||
8189             $searchtype eq 'committer') {
8190                 git_search_message(%co);
8191         } elsif ($searchtype eq 'pickaxe') {
8192                 git_search_changes(%co);
8193         } elsif ($searchtype eq 'grep') {
8194                 git_search_files(%co);
8195         } else {
8196                 die_error(400, "Unknown search type");
8197         }
8198 }
8199
8200 sub git_search_help {
8201         git_header_html();
8202         git_print_page_nav('','', $hash,$hash,$hash);
8203         print <<EOT;
8204 <p><strong>Pattern</strong> is by default a normal string that is matched precisely (but without
8205 regard to case, except in the case of pickaxe). However, when you check the <em>re</em> checkbox,
8206 the pattern entered is recognized as the POSIX extended
8207 <a href="http://en.wikipedia.org/wiki/Regular_expression">regular expression</a> (also case
8208 insensitive).</p>
8209 <dl>
8210 <dt><b>commit</b></dt>
8211 <dd>The commit messages and authorship information will be scanned for the given pattern.</dd>
8212 EOT
8213         my $have_grep = gitweb_check_feature('grep');
8214         if ($have_grep) {
8215                 print <<EOT;
8216 <dt><b>grep</b></dt>
8217 <dd>All files in the currently selected tree (HEAD unless you are explicitly browsing
8218     a different one) are searched for the given pattern. On large trees, this search can take
8219 a while and put some strain on the server, so please use it with some consideration. Note that
8220 due to git-grep peculiarity, currently if regexp mode is turned off, the matches are
8221 case-sensitive.</dd>
8222 EOT
8223         }
8224         print <<EOT;
8225 <dt><b>author</b></dt>
8226 <dd>Name and e-mail of the change author and date of birth of the patch will be scanned for the given pattern.</dd>
8227 <dt><b>committer</b></dt>
8228 <dd>Name and e-mail of the committer and date of commit will be scanned for the given pattern.</dd>
8229 EOT
8230         my $have_pickaxe = gitweb_check_feature('pickaxe');
8231         if ($have_pickaxe) {
8232                 print <<EOT;
8233 <dt><b>pickaxe</b></dt>
8234 <dd>All commits that caused the string to appear or disappear from any file (changes that
8235 added, removed or "modified" the string) will be listed. This search can take a while and
8236 takes a lot of strain on the server, so please use it wisely. Note that since you may be
8237 interested even in changes just changing the case as well, this search is case sensitive.</dd>
8238 EOT
8239         }
8240         print "</dl>\n";
8241         git_footer_html();
8242 }
8243
8244 sub git_shortlog {
8245         git_log_generic('shortlog', \&git_shortlog_body,
8246                         $hash, $hash_parent);
8247 }
8248
8249 ## ......................................................................
8250 ## feeds (RSS, Atom; OPML)
8251
8252 sub git_feed {
8253         my $format = shift || 'atom';
8254         my $have_blame = gitweb_check_feature('blame');
8255
8256         # Atom: http://www.atomenabled.org/developers/syndication/
8257         # RSS:  http://www.notestips.com/80256B3A007F2692/1/NAMO5P9UPQ
8258         if ($format ne 'rss' && $format ne 'atom') {
8259                 die_error(400, "Unknown web feed format");
8260         }
8261
8262         # log/feed of current (HEAD) branch, log of given branch, history of file/directory
8263         my $head = $hash || 'HEAD';
8264         my @commitlist = parse_commits($head, 150, 0, $file_name);
8265
8266         my %latest_commit;
8267         my %latest_date;
8268         my $content_type = "application/$format+xml";
8269         if (defined $cgi->http('HTTP_ACCEPT') &&
8270                  $cgi->Accept('text/xml') > $cgi->Accept($content_type)) {
8271                 # browser (feed reader) prefers text/xml
8272                 $content_type = 'text/xml';
8273         }
8274         if (defined($commitlist[0])) {
8275                 %latest_commit = %{$commitlist[0]};
8276                 my $latest_epoch = $latest_commit{'committer_epoch'};
8277                 exit_if_unmodified_since($latest_epoch);
8278                 %latest_date = parse_date($latest_epoch, $latest_commit{'committer_tz'});
8279         }
8280         print $cgi->header(
8281                 -type => $content_type,
8282                 -charset => 'utf-8',
8283                 %latest_date ? (-last_modified => $latest_date{'rfc2822'}) : (),
8284                 -status => '200 OK');
8285
8286         # Optimization: skip generating the body if client asks only
8287         # for Last-Modified date.
8288         return if ($cgi->request_method() eq 'HEAD');
8289
8290         # header variables
8291         my $title = "$site_name - $project/$action";
8292         my $feed_type = 'log';
8293         if (defined $hash) {
8294                 $title .= " - '$hash'";
8295                 $feed_type = 'branch log';
8296                 if (defined $file_name) {
8297                         $title .= " :: $file_name";
8298                         $feed_type = 'history';
8299                 }
8300         } elsif (defined $file_name) {
8301                 $title .= " - $file_name";
8302                 $feed_type = 'history';
8303         }
8304         $title .= " $feed_type";
8305         $title = esc_html($title);
8306         my $descr = git_get_project_description($project);
8307         if (defined $descr) {
8308                 $descr = esc_html($descr);
8309         } else {
8310                 $descr = "$project " .
8311                          ($format eq 'rss' ? 'RSS' : 'Atom') .
8312                          " feed";
8313         }
8314         my $owner = git_get_project_owner($project);
8315         $owner = esc_html($owner);
8316
8317         #header
8318         my $alt_url;
8319         if (defined $file_name) {
8320                 $alt_url = href(-full=>1, action=>"history", hash=>$hash, file_name=>$file_name);
8321         } elsif (defined $hash) {
8322                 $alt_url = href(-full=>1, action=>"log", hash=>$hash);
8323         } else {
8324                 $alt_url = href(-full=>1, action=>"summary");
8325         }
8326         print qq!<?xml version="1.0" encoding="utf-8"?>\n!;
8327         if ($format eq 'rss') {
8328                 print <<XML;
8329 <rss version="2.0" xmlns:content="http://purl.org/rss/1.0/modules/content/">
8330 <channel>
8331 XML
8332                 print "<title>$title</title>\n" .
8333                       "<link>$alt_url</link>\n" .
8334                       "<description>$descr</description>\n" .
8335                       "<language>en</language>\n" .
8336                       # project owner is responsible for 'editorial' content
8337                       "<managingEditor>$owner</managingEditor>\n";
8338                 if (defined $logo || defined $favicon) {
8339                         # prefer the logo to the favicon, since RSS
8340                         # doesn't allow both
8341                         my $img = esc_url($logo || $favicon);
8342                         print "<image>\n" .
8343                               "<url>$img</url>\n" .
8344                               "<title>$title</title>\n" .
8345                               "<link>$alt_url</link>\n" .
8346                               "</image>\n";
8347                 }
8348                 if (%latest_date) {
8349                         print "<pubDate>$latest_date{'rfc2822'}</pubDate>\n";
8350                         print "<lastBuildDate>$latest_date{'rfc2822'}</lastBuildDate>\n";
8351                 }
8352                 print "<generator>gitweb v.$version/$git_version</generator>\n";
8353         } elsif ($format eq 'atom') {
8354                 print <<XML;
8355 <feed xmlns="http://www.w3.org/2005/Atom">
8356 XML
8357                 print "<title>$title</title>\n" .
8358                       "<subtitle>$descr</subtitle>\n" .
8359                       '<link rel="alternate" type="text/html" href="' .
8360                       $alt_url . '" />' . "\n" .
8361                       '<link rel="self" type="' . $content_type . '" href="' .
8362                       $cgi->self_url() . '" />' . "\n" .
8363                       "<id>" . href(-full=>1) . "</id>\n" .
8364                       # use project owner for feed author
8365                       "<author><name>$owner</name></author>\n";
8366                 if (defined $favicon) {
8367                         print "<icon>" . esc_url($favicon) . "</icon>\n";
8368                 }
8369                 if (defined $logo) {
8370                         # not twice as wide as tall: 72 x 27 pixels
8371                         print "<logo>" . esc_url($logo) . "</logo>\n";
8372                 }
8373                 if (! %latest_date) {
8374                         # dummy date to keep the feed valid until commits trickle in:
8375                         print "<updated>1970-01-01T00:00:00Z</updated>\n";
8376                 } else {
8377                         print "<updated>$latest_date{'iso-8601'}</updated>\n";
8378                 }
8379                 print "<generator version='$version/$git_version'>gitweb</generator>\n";
8380         }
8381
8382         # contents
8383         for (my $i = 0; $i <= $#commitlist; $i++) {
8384                 my %co = %{$commitlist[$i]};
8385                 my $commit = $co{'id'};
8386                 # we read 150, we always show 30 and the ones more recent than 48 hours
8387                 if (($i >= 20) && ((time - $co{'author_epoch'}) > 48*60*60)) {
8388                         last;
8389                 }
8390                 my %cd = parse_date($co{'author_epoch'}, $co{'author_tz'});
8391
8392                 # get list of changed files
8393                 open my $fd, "-|", git_cmd(), "diff-tree", '-r', @diff_opts,
8394                         $co{'parent'} || "--root",
8395                         $co{'id'}, "--", (defined $file_name ? $file_name : ())
8396                         or next;
8397                 my @difftree = map { chomp; $_ } <$fd>;
8398                 close $fd
8399                         or next;
8400
8401                 # print element (entry, item)
8402                 my $co_url = href(-full=>1, action=>"commitdiff", hash=>$commit);
8403                 if ($format eq 'rss') {
8404                         print "<item>\n" .
8405                               "<title>" . esc_html($co{'title'}) . "</title>\n" .
8406                               "<author>" . esc_html($co{'author'}) . "</author>\n" .
8407                               "<pubDate>$cd{'rfc2822'}</pubDate>\n" .
8408                               "<guid isPermaLink=\"true\">$co_url</guid>\n" .
8409                               "<link>$co_url</link>\n" .
8410                               "<description>" . esc_html($co{'title'}) . "</description>\n" .
8411                               "<content:encoded>" .
8412                               "<![CDATA[\n";
8413                 } elsif ($format eq 'atom') {
8414                         print "<entry>\n" .
8415                               "<title type=\"html\">" . esc_html($co{'title'}) . "</title>\n" .
8416                               "<updated>$cd{'iso-8601'}</updated>\n" .
8417                               "<author>\n" .
8418                               "  <name>" . esc_html($co{'author_name'}) . "</name>\n";
8419                         if ($co{'author_email'}) {
8420                                 print "  <email>" . esc_html($co{'author_email'}) . "</email>\n";
8421                         }
8422                         print "</author>\n" .
8423                               # use committer for contributor
8424                               "<contributor>\n" .
8425                               "  <name>" . esc_html($co{'committer_name'}) . "</name>\n";
8426                         if ($co{'committer_email'}) {
8427                                 print "  <email>" . esc_html($co{'committer_email'}) . "</email>\n";
8428                         }
8429                         print "</contributor>\n" .
8430                               "<published>$cd{'iso-8601'}</published>\n" .
8431                               "<link rel=\"alternate\" type=\"text/html\" href=\"$co_url\" />\n" .
8432                               "<id>$co_url</id>\n" .
8433                               "<content type=\"xhtml\" xml:base=\"" . esc_url($my_url) . "\">\n" .
8434                               "<div xmlns=\"http://www.w3.org/1999/xhtml\">\n";
8435                 }
8436                 my $comment = $co{'comment'};
8437                 print "<pre>\n";
8438                 foreach my $line (@$comment) {
8439                         $line = esc_html($line);
8440                         print "$line\n";
8441                 }
8442                 print "</pre><ul>\n";
8443                 foreach my $difftree_line (@difftree) {
8444                         my %difftree = parse_difftree_raw_line($difftree_line);
8445                         next if !$difftree{'from_id'};
8446
8447                         my $file = $difftree{'file'} || $difftree{'to_file'};
8448
8449                         print "<li>" .
8450                               "[" .
8451                               $cgi->a({-href => href(-full=>1, action=>"blobdiff",
8452                                                      hash=>$difftree{'to_id'}, hash_parent=>$difftree{'from_id'},
8453                                                      hash_base=>$co{'id'}, hash_parent_base=>$co{'parent'},
8454                                                      file_name=>$file, file_parent=>$difftree{'from_file'}),
8455                                       -title => "diff"}, 'D');
8456                         if ($have_blame) {
8457                                 print $cgi->a({-href => href(-full=>1, action=>"blame",
8458                                                              file_name=>$file, hash_base=>$commit),
8459                                               -title => "blame"}, 'B');
8460                         }
8461                         # if this is not a feed of a file history
8462                         if (!defined $file_name || $file_name ne $file) {
8463                                 print $cgi->a({-href => href(-full=>1, action=>"history",
8464                                                              file_name=>$file, hash=>$commit),
8465                                               -title => "history"}, 'H');
8466                         }
8467                         $file = esc_path($file);
8468                         print "] ".
8469                               "$file</li>\n";
8470                 }
8471                 if ($format eq 'rss') {
8472                         print "</ul>]]>\n" .
8473                               "</content:encoded>\n" .
8474                               "</item>\n";
8475                 } elsif ($format eq 'atom') {
8476                         print "</ul>\n</div>\n" .
8477                               "</content>\n" .
8478                               "</entry>\n";
8479                 }
8480         }
8481
8482         # end of feed
8483         if ($format eq 'rss') {
8484                 print "</channel>\n</rss>\n";
8485         } elsif ($format eq 'atom') {
8486                 print "</feed>\n";
8487         }
8488 }
8489
8490 sub git_rss {
8491         git_feed('rss');
8492 }
8493
8494 sub git_atom {
8495         git_feed('atom');
8496 }
8497
8498 sub git_opml {
8499         my @list = git_get_projects_list($project_filter, $strict_export);
8500         if (!@list) {
8501                 die_error(404, "No projects found");
8502         }
8503
8504         print $cgi->header(
8505                 -type => 'text/xml',
8506                 -charset => 'utf-8',
8507                 -content_disposition => 'inline; filename="opml.xml"');
8508
8509         my $title = esc_html($site_name);
8510         my $filter = " within subdirectory ";
8511         if (defined $project_filter) {
8512                 $filter .= esc_html($project_filter);
8513         } else {
8514                 $filter = "";
8515         }
8516         print <<XML;
8517 <?xml version="1.0" encoding="utf-8"?>
8518 <opml version="1.0">
8519 <head>
8520   <title>$title OPML Export$filter</title>
8521 </head>
8522 <body>
8523 <outline text="git RSS feeds">
8524 XML
8525
8526         foreach my $pr (@list) {
8527                 my %proj = %$pr;
8528                 my $head = git_get_head_hash($proj{'path'});
8529                 if (!defined $head) {
8530                         next;
8531                 }
8532                 $git_dir = "$projectroot/$proj{'path'}";
8533                 my %co = parse_commit($head);
8534                 if (!%co) {
8535                         next;
8536                 }
8537
8538                 my $path = esc_html(chop_str($proj{'path'}, 25, 5));
8539                 my $rss  = href('project' => $proj{'path'}, 'action' => 'rss', -full => 1);
8540                 my $html = href('project' => $proj{'path'}, 'action' => 'summary', -full => 1);
8541                 print "<outline type=\"rss\" text=\"$path\" title=\"$path\" xmlUrl=\"$rss\" htmlUrl=\"$html\"/>\n";
8542         }
8543         print <<XML;
8544 </outline>
8545 </body>
8546 </opml>
8547 XML
8548 }