Lady’s Gitweb - Gitweb/blob - gitweb.perl

   1 #!/usr/bin/perl
   2
   3 # gitweb - simple web interface to track changes in git repositories
   4 #
   5 # (C) 2005-2006, Kay Sievers <kay.sievers@vrfy.org>
   6 # (C) 2005, Christian Gierke
   7 #
   8 # This program is licensed under the GPLv2
   9
  10 use 5.008;
  11 use strict;
  12 use warnings;
  13 use CGI qw(:standard :escapeHTML -nosticky);
  14 use CGI::Util qw(unescape);
  15 use CGI::Carp qw(fatalsToBrowser set_message);
  16 use Encode;
  17 use Fcntl ':mode';
  18 use File::Find qw();
  19 use File::Basename qw(basename);
  20 use Time::HiRes qw(gettimeofday tv_interval);
  21 binmode STDOUT, ':utf8';
  22
  23 our $t0 = [ gettimeofday() ];
  24 our $number_of_git_cmds = 0;
  25
  26 BEGIN {
  27         CGI->compile() if $ENV{'MOD_PERL'};
  28 }
  29
  30 our $version = "++GIT_VERSION++";
  31
  32 our ($my_url, $my_uri, $base_url, $path_info, $home_link);
  33 sub evaluate_uri {
  34         our $cgi;
  35
  36         our $my_url = $cgi->url();
  37         our $my_uri = $cgi->url(-absolute => 1);
  38
  39         # Base URL for relative URLs in gitweb ($logo, $favicon, ...),
  40         # needed and used only for URLs with nonempty PATH_INFO
  41         our $base_url = $my_url;
  42
  43         # When the script is used as DirectoryIndex, the URL does not contain the name
  44         # of the script file itself, and $cgi->url() fails to strip PATH_INFO, so we
  45         # have to do it ourselves. We make $path_info global because it's also used
  46         # later on.
  47         #
  48         # Another issue with the script being the DirectoryIndex is that the resulting
  49         # $my_url data is not the full script URL: this is good, because we want
  50         # generated links to keep implying the script name if it wasn't explicitly
  51         # indicated in the URL we're handling, but it means that $my_url cannot be used
  52         # as base URL.
  53         # Therefore, if we needed to strip PATH_INFO, then we know that we have
  54         # to build the base URL ourselves:
  55         our $path_info = decode_utf8($ENV{"PATH_INFO"});
  56         if ($path_info) {
  57                 # $path_info has already been URL-decoded by the web server, but
  58                 # $my_url and $my_uri have not. URL-decode them so we can properly
  59                 # strip $path_info.
  60                 $my_url = unescape($my_url);
  61                 $my_uri = unescape($my_uri);
  62                 if ($my_url =~ s,\Q$path_info\E$,, &&
  63                     $my_uri =~ s,\Q$path_info\E$,, &&
  64                     defined $ENV{'SCRIPT_NAME'}) {
  65                         $base_url = $cgi->url(-base => 1) . $ENV{'SCRIPT_NAME'};
  66                 }
  67         }
  68
  69         # target of the home link on top of all pages
  70         our $home_link = $my_uri || "/";
  71 }
  72
  73 # core git executable to use
  74 # this can just be "git" if your webserver has a sensible PATH
  75 our $GIT = "++GIT_BINDIR++/git";
  76
  77 # absolute fs-path which will be prepended to the project path
  78 #our $projectroot = "/pub/scm";
  79 our $projectroot = "++GITWEB_PROJECTROOT++";
  80
  81 # fs traversing limit for getting project list
  82 # the number is relative to the projectroot
  83 our $project_maxdepth = "++GITWEB_PROJECT_MAXDEPTH++";
  84
  85 # string of the home link on top of all pages
  86 our $home_link_str = "++GITWEB_HOME_LINK_STR++";
  87
  88 # extra breadcrumbs preceding the home link
  89 our @extra_breadcrumbs = ();
  90
  91 # name of your site or organization to appear in page titles
  92 # replace this with something more descriptive for clearer bookmarks
  93 our $site_name = "++GITWEB_SITENAME++"
  94                  || ($ENV{'SERVER_NAME'} || "Untitled") . " Git";
  95
  96 # html snippet to include in the <head> section of each page
  97 our $site_html_head_string = "++GITWEB_SITE_HTML_HEAD_STRING++";
  98 # filename of html text to include at top of each page
  99 our $site_header = "++GITWEB_SITE_HEADER++";
 100 # html text to include at home page
 101 our $home_text = "++GITWEB_HOMETEXT++";
 102 # filename of html text to include at bottom of each page
 103 our $site_footer = "++GITWEB_SITE_FOOTER++";
 104
 105 # URI of stylesheets
 106 our @stylesheets = ("++GITWEB_CSS++");
 107 # URI of a single stylesheet, which can be overridden in GITWEB_CONFIG.
 108 our $stylesheet = undef;
 109
 110 # URI of GIT logo (72x27 size)
 111 our $logo = "++GITWEB_LOGO++";
 112 # URI of GIT favicon, assumed to be image/png type
 113 our $favicon = "++GITWEB_FAVICON++";
 114 # URI of gitweb.js (JavaScript code for gitweb)
 115 our $javascript = "++GITWEB_JS++";
 116
 117 # URI and label (title) of GIT logo link
 118 #our $logo_url = "http://www.kernel.org/pub/software/scm/git/docs/";
 119 #our $logo_label = "git documentation";
 120 our $logo_url = "http://git-scm.com/";
 121 our $logo_label = "git homepage";
 122
 123 # source of projects list
 124 our $projects_list = "++GITWEB_LIST++";
 125
 126 # the width (in characters) of the projects list "Description" column
 127 our $projects_list_description_width = 25;
 128
 129 # group projects by category on the projects list
 130 # (enabled if this variable evaluates to true)
 131 our $projects_list_group_categories = 0;
 132
 133 # default category if none specified
 134 # (leave the empty string for no category)
 135 our $project_list_default_category = "";
 136
 137 # default order of projects list
 138 # valid values are none, project, descr, owner, and age
 139 our $default_projects_order = "project";
 140
 141 # show repository only if this file exists
 142 # (only effective if this variable evaluates to true)
 143 our $export_ok = "++GITWEB_EXPORT_OK++";
 144
 145 # don't generate age column on the projects list page
 146 our $omit_age_column = 0;
 147
 148 # don't generate information about owners of repositories
 149 our $omit_owner=0;
 150
 151 # show repository only if this subroutine returns true
 152 # when given the path to the project, for example:
 153 #    sub { return -e "$_[0]/git-daemon-export-ok"; }
 154 our $export_auth_hook = undef;
 155
 156 # only allow viewing of repositories also shown on the overview page
 157 our $strict_export = "++GITWEB_STRICT_EXPORT++";
 158
 159 # list of git base URLs used for URL to where fetch project from,
 160 # i.e. full URL is "$git_base_url/$project"
 161 our @git_base_url_list = grep { $_ ne '' } ("++GITWEB_BASE_URL++");
 162
 163 # default blob_plain mimetype and default charset for text/plain blob
 164 our $default_blob_plain_mimetype = 'text/plain';
 165 our $default_text_plain_charset  = undef;
 166
 167 # file to use for guessing MIME types before trying /etc/mime.types
 168 # (relative to the current git repository)
 169 our $mimetypes_file = undef;
 170
 171 # assume this charset if line contains non-UTF-8 characters;
 172 # it should be valid encoding (see Encoding::Supported(3pm) for list),
 173 # for which encoding all byte sequences are valid, for example
 174 # 'iso-8859-1' aka 'latin1' (it is decoded without checking, so it
 175 # could be even 'utf-8' for the old behavior)
 176 our $fallback_encoding = 'latin1';
 177
 178 # rename detection options for git-diff and git-diff-tree
 179 # - default is '-M', with the cost proportional to
 180 #   (number of removed files) * (number of new files).
 181 # - more costly is '-C' (which implies '-M'), with the cost proportional to
 182 #   (number of changed files + number of removed files) * (number of new files)
 183 # - even more costly is '-C', '--find-copies-harder' with cost
 184 #   (number of files in the original tree) * (number of new files)
 185 # - one might want to include '-B' option, e.g. '-B', '-M'
 186 our @diff_opts = ('-M'); # taken from git_commit
 187
 188 # Disables features that would allow repository owners to inject script into
 189 # the gitweb domain.
 190 our $prevent_xss = 0;
 191
 192 # Path to the highlight executable to use (must be the one from
 193 # http://www.andre-simon.de due to assumptions about parameters and output).
 194 # Useful if highlight is not installed on your webserver's PATH.
 195 # [Default: highlight]
 196 our $highlight_bin = "++HIGHLIGHT_BIN++";
 197
 198 # information about snapshot formats that gitweb is capable of serving
 199 our %known_snapshot_formats = (
 200         # name => {
 201         #       'display' => display name,
 202         #       'type' => mime type,
 203         #       'suffix' => filename suffix,
 204         #       'format' => --format for git-archive,
 205         #       'compressor' => [compressor command and arguments]
 206         #                       (array reference, optional)
 207         #       'disabled' => boolean (optional)}
 208         #
 209         'tgz' => {
 210                 'display' => 'tar.gz',
 211                 'type' => 'application/x-gzip',
 212                 'suffix' => '.tar.gz',
 213                 'format' => 'tar',
 214                 'compressor' => ['gzip', '-n']},
 215
 216         'tbz2' => {
 217                 'display' => 'tar.bz2',
 218                 'type' => 'application/x-bzip2',
 219                 'suffix' => '.tar.bz2',
 220                 'format' => 'tar',
 221                 'compressor' => ['bzip2']},
 222
 223         'txz' => {
 224                 'display' => 'tar.xz',
 225                 'type' => 'application/x-xz',
 226                 'suffix' => '.tar.xz',
 227                 'format' => 'tar',
 228                 'compressor' => ['xz'],
 229                 'disabled' => 1},
 230
 231         'zip' => {
 232                 'display' => 'zip',
 233                 'type' => 'application/x-zip',
 234                 'suffix' => '.zip',
 235                 'format' => 'zip'},
 236 );
 237
 238 # Aliases so we understand old gitweb.snapshot values in repository
 239 # configuration.
 240 our %known_snapshot_format_aliases = (
 241         'gzip'  => 'tgz',
 242         'bzip2' => 'tbz2',
 243         'xz'    => 'txz',
 244
 245         # backward compatibility: legacy gitweb config support
 246         'x-gzip' => undef, 'gz' => undef,
 247         'x-bzip2' => undef, 'bz2' => undef,
 248         'x-zip' => undef, '' => undef,
 249 );
 250
 251 # Pixel sizes for icons and avatars. If the default font sizes or lineheights
 252 # are changed, it may be appropriate to change these values too via
 253 # $GITWEB_CONFIG.
 254 our %avatar_size = (
 255         'default' => 16,
 256         'double'  => 32
 257 );
 258
 259 # Used to set the maximum load that we will still respond to gitweb queries.
 260 # If server load exceed this value then return "503 server busy" error.
 261 # If gitweb cannot determined server load, it is taken to be 0.
 262 # Leave it undefined (or set to 'undef') to turn off load checking.
 263 our $maxload = 300;
 264
 265 # configuration for 'highlight' (http://www.andre-simon.de/)
 266 # match by basename
 267 our %highlight_basename = (
 268         #'Program' => 'py',
 269         #'Library' => 'py',
 270         'SConstruct' => 'py', # SCons equivalent of Makefile
 271         'Makefile' => 'make',
 272 );
 273 # match by extension
 274 our %highlight_ext = (
 275         # main extensions, defining name of syntax;
 276         # see files in /usr/share/highlight/langDefs/ directory
 277         (map { $_ => $_ } qw(py rb java css js tex bib xml awk bat ini spec tcl sql)),
 278         # alternate extensions, see /etc/highlight/filetypes.conf
 279         (map { $_ => 'c'   } qw(c h)),
 280         (map { $_ => 'sh'  } qw(sh bash zsh ksh)),
 281         (map { $_ => 'cpp' } qw(cpp cxx c++ cc)),
 282         (map { $_ => 'php' } qw(php php3 php4 php5 phps)),
 283         (map { $_ => 'pl'  } qw(pl perl pm)), # perhaps also 'cgi'
 284         (map { $_ => 'make'} qw(make mak mk)),
 285         (map { $_ => 'xml' } qw(xml xhtml html htm)),
 286 );
 287
 288 # You define site-wide feature defaults here; override them with
 289 # $GITWEB_CONFIG as necessary.
 290 our %feature = (
 291         # feature => {
 292         #       'sub' => feature-sub (subroutine),
 293         #       'override' => allow-override (boolean),
 294         #       'default' => [ default options...] (array reference)}
 295         #
 296         # if feature is overridable (it means that allow-override has true value),
 297         # then feature-sub will be called with default options as parameters;
 298         # return value of feature-sub indicates if to enable specified feature
 299         #
 300         # if there is no 'sub' key (no feature-sub), then feature cannot be
 301         # overridden
 302         #
 303         # use gitweb_get_feature(<feature>) to retrieve the <feature> value
 304         # (an array) or gitweb_check_feature(<feature>) to check if <feature>
 305         # is enabled
 306
 307         # Enable the 'blame' blob view, showing the last commit that modified
 308         # each line in the file. This can be very CPU-intensive.
 309
 310         # To enable system wide have in $GITWEB_CONFIG
 311         # $feature{'blame'}{'default'} = [1];
 312         # To have project specific config enable override in $GITWEB_CONFIG
 313         # $feature{'blame'}{'override'} = 1;
 314         # and in project config gitweb.blame = 0|1;
 315         'blame' => {
 316                 'sub' => sub { feature_bool('blame', @_) },
 317                 'override' => 0,
 318                 'default' => [0]},
 319
 320         # Enable the 'snapshot' link, providing a compressed archive of any
 321         # tree. This can potentially generate high traffic if you have large
 322         # project.
 323
 324         # Value is a list of formats defined in %known_snapshot_formats that
 325         # you wish to offer.
 326         # To disable system wide have in $GITWEB_CONFIG
 327         # $feature{'snapshot'}{'default'} = [];
 328         # To have project specific config enable override in $GITWEB_CONFIG
 329         # $feature{'snapshot'}{'override'} = 1;
 330         # and in project config, a comma-separated list of formats or "none"
 331         # to disable.  Example: gitweb.snapshot = tbz2,zip;
 332         'snapshot' => {
 333                 'sub' => \&feature_snapshot,
 334                 'override' => 0,
 335                 'default' => ['tgz']},
 336
 337         # Enable text search, which will list the commits which match author,
 338         # committer or commit text to a given string.  Enabled by default.
 339         # Project specific override is not supported.
 340         #
 341         # Note that this controls all search features, which means that if
 342         # it is disabled, then 'grep' and 'pickaxe' search would also be
 343         # disabled.
 344         'search' => {
 345                 'override' => 0,
 346                 'default' => [1]},
 347
 348         # Enable grep search, which will list the files in currently selected
 349         # tree containing the given string. Enabled by default. This can be
 350         # potentially CPU-intensive, of course.
 351         # Note that you need to have 'search' feature enabled too.
 352
 353         # To enable system wide have in $GITWEB_CONFIG
 354         # $feature{'grep'}{'default'} = [1];
 355         # To have project specific config enable override in $GITWEB_CONFIG
 356         # $feature{'grep'}{'override'} = 1;
 357         # and in project config gitweb.grep = 0|1;
 358         'grep' => {
 359                 'sub' => sub { feature_bool('grep', @_) },
 360                 'override' => 0,
 361                 'default' => [1]},
 362
 363         # Enable the pickaxe search, which will list the commits that modified
 364         # a given string in a file. This can be practical and quite faster
 365         # alternative to 'blame', but still potentially CPU-intensive.
 366         # Note that you need to have 'search' feature enabled too.
 367
 368         # To enable system wide have in $GITWEB_CONFIG
 369         # $feature{'pickaxe'}{'default'} = [1];
 370         # To have project specific config enable override in $GITWEB_CONFIG
 371         # $feature{'pickaxe'}{'override'} = 1;
 372         # and in project config gitweb.pickaxe = 0|1;
 373         'pickaxe' => {
 374                 'sub' => sub { feature_bool('pickaxe', @_) },
 375                 'override' => 0,
 376                 'default' => [1]},
 377
 378         # Enable showing size of blobs in a 'tree' view, in a separate
 379         # column, similar to what 'ls -l' does.  This cost a bit of IO.
 380
 381         # To disable system wide have in $GITWEB_CONFIG
 382         # $feature{'show-sizes'}{'default'} = [0];
 383         # To have project specific config enable override in $GITWEB_CONFIG
 384         # $feature{'show-sizes'}{'override'} = 1;
 385         # and in project config gitweb.showsizes = 0|1;
 386         'show-sizes' => {
 387                 'sub' => sub { feature_bool('showsizes', @_) },
 388                 'override' => 0,
 389                 'default' => [1]},
 390
 391         # Make gitweb use an alternative format of the URLs which can be
 392         # more readable and natural-looking: project name is embedded
 393         # directly in the path and the query string contains other
 394         # auxiliary information. All gitweb installations recognize
 395         # URL in either format; this configures in which formats gitweb
 396         # generates links.
 397
 398         # To enable system wide have in $GITWEB_CONFIG
 399         # $feature{'pathinfo'}{'default'} = [1];
 400         # Project specific override is not supported.
 401
 402         # Note that you will need to change the default location of CSS,
 403         # favicon, logo and possibly other files to an absolute URL. Also,
 404         # if gitweb.cgi serves as your indexfile, you will need to force
 405         # $my_uri to contain the script name in your $GITWEB_CONFIG.
 406         'pathinfo' => {
 407                 'override' => 0,
 408                 'default' => [0]},
 409
 410         # Make gitweb consider projects in project root subdirectories
 411         # to be forks of existing projects. Given project $projname.git,
 412         # projects matching $projname/*.git will not be shown in the main
 413         # projects list, instead a '+' mark will be added to $projname
 414         # there and a 'forks' view will be enabled for the project, listing
 415         # all the forks. If project list is taken from a file, forks have
 416         # to be listed after the main project.
 417
 418         # To enable system wide have in $GITWEB_CONFIG
 419         # $feature{'forks'}{'default'} = [1];
 420         # Project specific override is not supported.
 421         'forks' => {
 422                 'override' => 0,
 423                 'default' => [0]},
 424
 425         # Insert custom links to the action bar of all project pages.
 426         # This enables you mainly to link to third-party scripts integrating
 427         # into gitweb; e.g. git-browser for graphical history representation
 428         # or custom web-based repository administration interface.
 429
 430         # The 'default' value consists of a list of triplets in the form
 431         # (label, link, position) where position is the label after which
 432         # to insert the link and link is a format string where %n expands
 433         # to the project name, %f to the project path within the filesystem,
 434         # %h to the current hash (h gitweb parameter) and %b to the current
 435         # hash base (hb gitweb parameter); %% expands to %.
 436
 437         # To enable system wide have in $GITWEB_CONFIG e.g.
 438         # $feature{'actions'}{'default'} = [('graphiclog',
 439         #       '/git-browser/by-commit.html?r=%n', 'summary')];
 440         # Project specific override is not supported.
 441         'actions' => {
 442                 'override' => 0,
 443                 'default' => []},
 444
 445         # Allow gitweb scan project content tags of project repository,
 446         # and display the popular Web 2.0-ish "tag cloud" near the projects
 447         # list.  Note that this is something COMPLETELY different from the
 448         # normal Git tags.
 449
 450         # gitweb by itself can show existing tags, but it does not handle
 451         # tagging itself; you need to do it externally, outside gitweb.
 452         # The format is described in git_get_project_ctags() subroutine.
 453         # You may want to install the HTML::TagCloud Perl module to get
 454         # a pretty tag cloud instead of just a list of tags.
 455
 456         # To enable system wide have in $GITWEB_CONFIG
 457         # $feature{'ctags'}{'default'} = [1];
 458         # Project specific override is not supported.
 459
 460         # In the future whether ctags editing is enabled might depend
 461         # on the value, but using 1 should always mean no editing of ctags.
 462         'ctags' => {
 463                 'override' => 0,
 464                 'default' => [0]},
 465
 466         # The maximum number of patches in a patchset generated in patch
 467         # view. Set this to 0 or undef to disable patch view, or to a
 468         # negative number to remove any limit.
 469
 470         # To disable system wide have in $GITWEB_CONFIG
 471         # $feature{'patches'}{'default'} = [0];
 472         # To have project specific config enable override in $GITWEB_CONFIG
 473         # $feature{'patches'}{'override'} = 1;
 474         # and in project config gitweb.patches = 0|n;
 475         # where n is the maximum number of patches allowed in a patchset.
 476         'patches' => {
 477                 'sub' => \&feature_patches,
 478                 'override' => 0,
 479                 'default' => [16]},
 480
 481         # Avatar support. When this feature is enabled, views such as
 482         # shortlog or commit will display an avatar associated with
 483         # the email of the committer(s) and/or author(s).
 484
 485         # Currently available providers are gravatar and picon.
 486         # If an unknown provider is specified, the feature is disabled.
 487
 488         # Gravatar depends on Digest::MD5.
 489         # Picon currently relies on the indiana.edu database.
 490
 491         # To enable system wide have in $GITWEB_CONFIG
 492         # $feature{'avatar'}{'default'} = ['<provider>'];
 493         # where <provider> is either gravatar or picon.
 494         # To have project specific config enable override in $GITWEB_CONFIG
 495         # $feature{'avatar'}{'override'} = 1;
 496         # and in project config gitweb.avatar = <provider>;
 497         'avatar' => {
 498                 'sub' => \&feature_avatar,
 499                 'override' => 0,
 500                 'default' => ['']},
 501
 502         # Enable displaying how much time and how many git commands
 503         # it took to generate and display page.  Disabled by default.
 504         # Project specific override is not supported.
 505         'timed' => {
 506                 'override' => 0,
 507                 'default' => [0]},
 508
 509         # Enable turning some links into links to actions which require
 510         # JavaScript to run (like 'blame_incremental').  Not enabled by
 511         # default.  Project specific override is currently not supported.
 512         'javascript-actions' => {
 513                 'override' => 0,
 514                 'default' => [0]},
 515
 516         # Enable and configure ability to change common timezone for dates
 517         # in gitweb output via JavaScript.  Enabled by default.
 518         # Project specific override is not supported.
 519         'javascript-timezone' => {
 520                 'override' => 0,
 521                 'default' => [
 522                         'local',     # default timezone: 'utc', 'local', or '(-|+)HHMM' format,
 523                                      # or undef to turn off this feature
 524                         'gitweb_tz', # name of cookie where to store selected timezone
 525                         'datetime',  # CSS class used to mark up dates for manipulation
 526                 ]},
 527
 528         # Syntax highlighting support. This is based on Daniel Svensson's
 529         # and Sham Chukoury's work in gitweb-xmms2.git.
 530         # It requires the 'highlight' program present in $PATH,
 531         # and therefore is disabled by default.
 532
 533         # To enable system wide have in $GITWEB_CONFIG
 534         # $feature{'highlight'}{'default'} = [1];
 535
 536         'highlight' => {
 537                 'sub' => sub { feature_bool('highlight', @_) },
 538                 'override' => 0,
 539                 'default' => [0]},
 540
 541         # Enable displaying of remote heads in the heads list
 542
 543         # To enable system wide have in $GITWEB_CONFIG
 544         # $feature{'remote_heads'}{'default'} = [1];
 545         # To have project specific config enable override in $GITWEB_CONFIG
 546         # $feature{'remote_heads'}{'override'} = 1;
 547         # and in project config gitweb.remoteheads = 0|1;
 548         'remote_heads' => {
 549                 'sub' => sub { feature_bool('remote_heads', @_) },
 550                 'override' => 0,
 551                 'default' => [0]},
 552 );
 553
 554 sub gitweb_get_feature {
 555         my ($name) = @_;
 556         return unless exists $feature{$name};
 557         my ($sub, $override, @defaults) = (
 558                 $feature{$name}{'sub'},
 559                 $feature{$name}{'override'},
 560                 @{$feature{$name}{'default'}});
 561         # project specific override is possible only if we have project
 562         our $git_dir; # global variable, declared later
 563         if (!$override || !defined $git_dir) {
 564                 return @defaults;
 565         }
 566         if (!defined $sub) {
 567                 warn "feature $name is not overridable";
 568                 return @defaults;
 569         }
 570         return $sub->(@defaults);
 571 }
 572
 573 # A wrapper to check if a given feature is enabled.
 574 # With this, you can say
 575 #
 576 #   my $bool_feat = gitweb_check_feature('bool_feat');
 577 #   gitweb_check_feature('bool_feat') or somecode;
 578 #
 579 # instead of
 580 #
 581 #   my ($bool_feat) = gitweb_get_feature('bool_feat');
 582 #   (gitweb_get_feature('bool_feat'))[0] or somecode;
 583 #
 584 sub gitweb_check_feature {
 585         return (gitweb_get_feature(@_))[0];
 586 }
 587
 588
 589 sub feature_bool {
 590         my $key = shift;
 591         my ($val) = git_get_project_config($key, '--bool');
 592
 593         if (!defined $val) {
 594                 return ($_[0]);
 595         } elsif ($val eq 'true') {
 596                 return (1);
 597         } elsif ($val eq 'false') {
 598                 return (0);
 599         }
 600 }
 601
 602 sub feature_snapshot {
 603         my (@fmts) = @_;
 604
 605         my ($val) = git_get_project_config('snapshot');
 606
 607         if ($val) {
 608                 @fmts = ($val eq 'none' ? () : split /\s*[,\s]\s*/, $val);
 609         }
 610
 611         return @fmts;
 612 }
 613
 614 sub feature_patches {
 615         my @val = (git_get_project_config('patches', '--int'));
 616
 617         if (@val) {
 618                 return @val;
 619         }
 620
 621         return ($_[0]);
 622 }
 623
 624 sub feature_avatar {
 625         my @val = (git_get_project_config('avatar'));
 626
 627         return @val ? @val : @_;
 628 }
 629
 630 # checking HEAD file with -e is fragile if the repository was
 631 # initialized long time ago (i.e. symlink HEAD) and was pack-ref'ed
 632 # and then pruned.
 633 sub check_head_link {
 634         my ($dir) = @_;
 635         my $headfile = "$dir/HEAD";
 636         return ((-e $headfile) ||
 637                 (-l $headfile && readlink($headfile) =~ /^refs\/heads\//));
 638 }
 639
 640 sub check_export_ok {
 641         my ($dir) = @_;
 642         return (check_head_link($dir) &&
 643                 (!$export_ok || -e "$dir/$export_ok") &&
 644                 (!$export_auth_hook || $export_auth_hook->($dir)));
 645 }
 646
 647 # process alternate names for backward compatibility
 648 # filter out unsupported (unknown) snapshot formats
 649 sub filter_snapshot_fmts {
 650         my @fmts = @_;
 651
 652         @fmts = map {
 653                 exists $known_snapshot_format_aliases{$_} ?
 654                        $known_snapshot_format_aliases{$_} : $_} @fmts;
 655         @fmts = grep {
 656                 exists $known_snapshot_formats{$_} &&
 657                 !$known_snapshot_formats{$_}{'disabled'}} @fmts;
 658 }
 659
 660 # If it is set to code reference, it is code that it is to be run once per
 661 # request, allowing updating configurations that change with each request,
 662 # while running other code in config file only once.
 663 #
 664 # Otherwise, if it is false then gitweb would process config file only once;
 665 # if it is true then gitweb config would be run for each request.
 666 our $per_request_config = 1;
 667
 668 # read and parse gitweb config file given by its parameter.
 669 # returns true on success, false on recoverable error, allowing
 670 # to chain this subroutine, using first file that exists.
 671 # dies on errors during parsing config file, as it is unrecoverable.
 672 sub read_config_file {
 673         my $filename = shift;
 674         return unless defined $filename;
 675         # die if there are errors parsing config file
 676         if (-e $filename) {
 677                 do $filename;
 678                 die $@ if $@;
 679                 return 1;
 680         }
 681         return;
 682 }
 683
 684 our ($GITWEB_CONFIG, $GITWEB_CONFIG_SYSTEM, $GITWEB_CONFIG_COMMON);
 685 sub evaluate_gitweb_config {
 686         our $GITWEB_CONFIG = $ENV{'GITWEB_CONFIG'} || "++GITWEB_CONFIG++";
 687         our $GITWEB_CONFIG_SYSTEM = $ENV{'GITWEB_CONFIG_SYSTEM'} || "++GITWEB_CONFIG_SYSTEM++";
 688         our $GITWEB_CONFIG_COMMON = $ENV{'GITWEB_CONFIG_COMMON'} || "++GITWEB_CONFIG_COMMON++";
 689
 690         # Protect against duplications of file names, to not read config twice.
 691         # Only one of $GITWEB_CONFIG and $GITWEB_CONFIG_SYSTEM is used, so
 692         # there possibility of duplication of filename there doesn't matter.
 693         $GITWEB_CONFIG = ""        if ($GITWEB_CONFIG eq $GITWEB_CONFIG_COMMON);
 694         $GITWEB_CONFIG_SYSTEM = "" if ($GITWEB_CONFIG_SYSTEM eq $GITWEB_CONFIG_COMMON);
 695
 696         # Common system-wide settings for convenience.
 697         # Those settings can be ovverriden by GITWEB_CONFIG or GITWEB_CONFIG_SYSTEM.
 698         read_config_file($GITWEB_CONFIG_COMMON);
 699
 700         # Use first config file that exists.  This means use the per-instance
 701         # GITWEB_CONFIG if exists, otherwise use GITWEB_SYSTEM_CONFIG.
 702         read_config_file($GITWEB_CONFIG) and return;
 703         read_config_file($GITWEB_CONFIG_SYSTEM);
 704 }
 705
 706 # Get loadavg of system, to compare against $maxload.
 707 # Currently it requires '/proc/loadavg' present to get loadavg;
 708 # if it is not present it returns 0, which means no load checking.
 709 sub get_loadavg {
 710         if( -e '/proc/loadavg' ){
 711                 open my $fd, '<', '/proc/loadavg'
 712                         or return 0;
 713                 my @load = split(/\s+/, scalar <$fd>);
 714                 close $fd;
 715
 716                 # The first three columns measure CPU and IO utilization of the last one,
 717                 # five, and 10 minute periods.  The fourth column shows the number of
 718                 # currently running processes and the total number of processes in the m/n
 719                 # format.  The last column displays the last process ID used.
 720                 return $load[0] || 0;
 721         }
 722         # additional checks for load average should go here for things that don't export
 723         # /proc/loadavg
 724
 725         return 0;
 726 }
 727
 728 # version of the core git binary
 729 our $git_version;
 730 sub evaluate_git_version {
 731         our $git_version = qx("$GIT" --version) =~ m/git version (.*)$/ ? $1 : "unknown";
 732         $number_of_git_cmds++;
 733 }
 734
 735 sub check_loadavg {
 736         if (defined $maxload && get_loadavg() > $maxload) {
 737                 die_error(503, "The load average on the server is too high");
 738         }
 739 }
 740
 741 # ======================================================================
 742 # input validation and dispatch
 743
 744 # input parameters can be collected from a variety of sources (presently, CGI
 745 # and PATH_INFO), so we define an %input_params hash that collects them all
 746 # together during validation: this allows subsequent uses (e.g. href()) to be
 747 # agnostic of the parameter origin
 748
 749 our %input_params = ();
 750
 751 # input parameters are stored with the long parameter name as key. This will
 752 # also be used in the href subroutine to convert parameters to their CGI
 753 # equivalent, and since the href() usage is the most frequent one, we store
 754 # the name -> CGI key mapping here, instead of the reverse.
 755 #
 756 # XXX: Warning: If you touch this, check the search form for updating,
 757 # too.
 758
 759 our @cgi_param_mapping = (
 760         project => "p",
 761         action => "a",
 762         file_name => "f",
 763         file_parent => "fp",
 764         hash => "h",
 765         hash_parent => "hp",
 766         hash_base => "hb",
 767         hash_parent_base => "hpb",
 768         page => "pg",
 769         order => "o",
 770         searchtext => "s",
 771         searchtype => "st",
 772         snapshot_format => "sf",
 773         extra_options => "opt",
 774         search_use_regexp => "sr",
 775         ctag => "by_tag",
 776         diff_style => "ds",
 777         project_filter => "pf",
 778         # this must be last entry (for manipulation from JavaScript)
 779         javascript => "js"
 780 );
 781 our %cgi_param_mapping = @cgi_param_mapping;
 782
 783 # we will also need to know the possible actions, for validation
 784 our %actions = (
 785         "blame" => \&git_blame,
 786         "blame_incremental" => \&git_blame_incremental,
 787         "blame_data" => \&git_blame_data,
 788         "blobdiff" => \&git_blobdiff,
 789         "blobdiff_plain" => \&git_blobdiff_plain,
 790         "blob" => \&git_blob,
 791         "blob_plain" => \&git_blob_plain,
 792         "commitdiff" => \&git_commitdiff,
 793         "commitdiff_plain" => \&git_commitdiff_plain,
 794         "commit" => \&git_commit,
 795         "forks" => \&git_forks,
 796         "heads" => \&git_heads,
 797         "history" => \&git_history,
 798         "log" => \&git_log,
 799         "patch" => \&git_patch,
 800         "patches" => \&git_patches,
 801         "remotes" => \&git_remotes,
 802         "rss" => \&git_rss,
 803         "atom" => \&git_atom,
 804         "search" => \&git_search,
 805         "search_help" => \&git_search_help,
 806         "shortlog" => \&git_shortlog,
 807         "summary" => \&git_summary,
 808         "tag" => \&git_tag,
 809         "tags" => \&git_tags,
 810         "tree" => \&git_tree,
 811         "snapshot" => \&git_snapshot,
 812         "object" => \&git_object,
 813         # those below don't need $project
 814         "opml" => \&git_opml,
 815         "project_list" => \&git_project_list,
 816         "project_index" => \&git_project_index,
 817 );
 818
 819 # finally, we have the hash of allowed extra_options for the commands that
 820 # allow them
 821 our %allowed_options = (
 822         "--no-merges" => [ qw(rss atom log shortlog history) ],
 823 );
 824
 825 # fill %input_params with the CGI parameters. All values except for 'opt'
 826 # should be single values, but opt can be an array. We should probably
 827 # build an array of parameters that can be multi-valued, but since for the time
 828 # being it's only this one, we just single it out
 829 sub evaluate_query_params {
 830         our $cgi;
 831
 832         while (my ($name, $symbol) = each %cgi_param_mapping) {
 833                 if ($symbol eq 'opt') {
 834                         $input_params{$name} = [ map { decode_utf8($_) } $cgi->param($symbol) ];
 835                 } else {
 836                         $input_params{$name} = decode_utf8($cgi->param($symbol));
 837                 }
 838         }
 839 }
 840
 841 # now read PATH_INFO and update the parameter list for missing parameters
 842 sub evaluate_path_info {
 843         return if defined $input_params{'project'};
 844         return if !$path_info;
 845         $path_info =~ s,^/+,,;
 846         return if !$path_info;
 847
 848         # find which part of PATH_INFO is project
 849         my $project = $path_info;
 850         $project =~ s,/+$,,;
 851         while ($project && !check_head_link("$projectroot/$project")) {
 852                 $project =~ s,/*[^/]*$,,;
 853         }
 854         return unless $project;
 855         $input_params{'project'} = $project;
 856
 857         # do not change any parameters if an action is given using the query string
 858         return if $input_params{'action'};
 859         $path_info =~ s,^\Q$project\E/*,,;
 860
 861         # next, check if we have an action
 862         my $action = $path_info;
 863         $action =~ s,/.*$,,;
 864         if (exists $actions{$action}) {
 865                 $path_info =~ s,^$action/*,,;
 866                 $input_params{'action'} = $action;
 867         }
 868
 869         # list of actions that want hash_base instead of hash, but can have no
 870         # pathname (f) parameter
 871         my @wants_base = (
 872                 'tree',
 873                 'history',
 874         );
 875
 876         # we want to catch, among others
 877         # [$hash_parent_base[:$file_parent]..]$hash_parent[:$file_name]
 878         my ($parentrefname, $parentpathname, $refname, $pathname) =
 879                 ($path_info =~ /^(?:(.+?)(?::(.+))?\.\.)?([^:]+?)?(?::(.+))?$/);
 880
 881         # first, analyze the 'current' part
 882         if (defined $pathname) {
 883                 # we got "branch:filename" or "branch:dir/"
 884                 # we could use git_get_type(branch:pathname), but:
 885                 # - it needs $git_dir
 886                 # - it does a git() call
 887                 # - the convention of terminating directories with a slash
 888                 #   makes it superfluous
 889                 # - embedding the action in the PATH_INFO would make it even
 890                 #   more superfluous
 891                 $pathname =~ s,^/+,,;
 892                 if (!$pathname || substr($pathname, -1) eq "/") {
 893                         $input_params{'action'} ||= "tree";
 894                         $pathname =~ s,/$,,;
 895                 } else {
 896                         # the default action depends on whether we had parent info
 897                         # or not
 898                         if ($parentrefname) {
 899                                 $input_params{'action'} ||= "blobdiff_plain";
 900                         } else {
 901                                 $input_params{'action'} ||= "blob_plain";
 902                         }
 903                 }
 904                 $input_params{'hash_base'} ||= $refname;
 905                 $input_params{'file_name'} ||= $pathname;
 906         } elsif (defined $refname) {
 907                 # we got "branch". In this case we have to choose if we have to
 908                 # set hash or hash_base.
 909                 #
 910                 # Most of the actions without a pathname only want hash to be
 911                 # set, except for the ones specified in @wants_base that want
 912                 # hash_base instead. It should also be noted that hand-crafted
 913                 # links having 'history' as an action and no pathname or hash
 914                 # set will fail, but that happens regardless of PATH_INFO.
 915                 if (defined $parentrefname) {
 916                         # if there is parent let the default be 'shortlog' action
 917                         # (for http://git.example.com/repo.git/A..B links); if there
 918                         # is no parent, dispatch will detect type of object and set
 919                         # action appropriately if required (if action is not set)
 920                         $input_params{'action'} ||= "shortlog";
 921                 }
 922                 if ($input_params{'action'} &&
 923                     grep { $_ eq $input_params{'action'} } @wants_base) {
 924                         $input_params{'hash_base'} ||= $refname;
 925                 } else {
 926                         $input_params{'hash'} ||= $refname;
 927                 }
 928         }
 929
 930         # next, handle the 'parent' part, if present
 931         if (defined $parentrefname) {
 932                 # a missing pathspec defaults to the 'current' filename, allowing e.g.
 933                 # someproject/blobdiff/oldrev..newrev:/filename
 934                 if ($parentpathname) {
 935                         $parentpathname =~ s,^/+,,;
 936                         $parentpathname =~ s,/$,,;
 937                         $input_params{'file_parent'} ||= $parentpathname;
 938                 } else {
 939                         $input_params{'file_parent'} ||= $input_params{'file_name'};
 940                 }
 941                 # we assume that hash_parent_base is wanted if a path was specified,
 942                 # or if the action wants hash_base instead of hash
 943                 if (defined $input_params{'file_parent'} ||
 944                         grep { $_ eq $input_params{'action'} } @wants_base) {
 945                         $input_params{'hash_parent_base'} ||= $parentrefname;
 946                 } else {
 947                         $input_params{'hash_parent'} ||= $parentrefname;
 948                 }
 949         }
 950
 951         # for the snapshot action, we allow URLs in the form
 952         # $project/snapshot/$hash.ext
 953         # where .ext determines the snapshot and gets removed from the
 954         # passed $refname to provide the $hash.
 955         #
 956         # To be able to tell that $refname includes the format extension, we
 957         # require the following two conditions to be satisfied:
 958         # - the hash input parameter MUST have been set from the $refname part
 959         #   of the URL (i.e. they must be equal)
 960         # - the snapshot format MUST NOT have been defined already (e.g. from
 961         #   CGI parameter sf)
 962         # It's also useless to try any matching unless $refname has a dot,
 963         # so we check for that too
 964         if (defined $input_params{'action'} &&
 965                 $input_params{'action'} eq 'snapshot' &&
 966                 defined $refname && index($refname, '.') != -1 &&
 967                 $refname eq $input_params{'hash'} &&
 968                 !defined $input_params{'snapshot_format'}) {
 969                 # We loop over the known snapshot formats, checking for
 970                 # extensions. Allowed extensions are both the defined suffix
 971                 # (which includes the initial dot already) and the snapshot
 972                 # format key itself, with a prepended dot
 973                 while (my ($fmt, $opt) = each %known_snapshot_formats) {
 974                         my $hash = $refname;
 975                         unless ($hash =~ s/(\Q$opt->{'suffix'}\E|\Q.$fmt\E)$//) {
 976                                 next;
 977                         }
 978                         my $sfx = $1;
 979                         # a valid suffix was found, so set the snapshot format
 980                         # and reset the hash parameter
 981                         $input_params{'snapshot_format'} = $fmt;
 982                         $input_params{'hash'} = $hash;
 983                         # we also set the format suffix to the one requested
 984                         # in the URL: this way a request for e.g. .tgz returns
 985                         # a .tgz instead of a .tar.gz
 986                         $known_snapshot_formats{$fmt}{'suffix'} = $sfx;
 987                         last;
 988                 }
 989         }
 990 }
 991
 992 our ($action, $project, $file_name, $file_parent, $hash, $hash_parent, $hash_base,
 993      $hash_parent_base, @extra_options, $page, $searchtype, $search_use_regexp,
 994      $searchtext, $search_regexp, $project_filter);
 995 sub evaluate_and_validate_params {
 996         our $action = $input_params{'action'};
 997         if (defined $action) {
 998                 if (!is_valid_action($action)) {
 999                         die_error(400, "Invalid action parameter");
1000                 }
1001         }
1002
1003         # parameters which are pathnames
1004         our $project = $input_params{'project'};
1005         if (defined $project) {
1006                 if (!is_valid_project($project)) {
1007                         undef $project;
1008                         die_error(404, "No such project");
1009                 }
1010         }
1011
1012         our $project_filter = $input_params{'project_filter'};
1013         if (defined $project_filter) {
1014                 if (!is_valid_pathname($project_filter)) {
1015                         die_error(404, "Invalid project_filter parameter");
1016                 }
1017         }
1018
1019         our $file_name = $input_params{'file_name'};
1020         if (defined $file_name) {
1021                 if (!is_valid_pathname($file_name)) {
1022                         die_error(400, "Invalid file parameter");
1023                 }
1024         }
1025
1026         our $file_parent = $input_params{'file_parent'};
1027         if (defined $file_parent) {
1028                 if (!is_valid_pathname($file_parent)) {
1029                         die_error(400, "Invalid file parent parameter");
1030                 }
1031         }
1032
1033         # parameters which are refnames
1034         our $hash = $input_params{'hash'};
1035         if (defined $hash) {
1036                 if (!is_valid_refname($hash)) {
1037                         die_error(400, "Invalid hash parameter");
1038                 }
1039         }
1040
1041         our $hash_parent = $input_params{'hash_parent'};
1042         if (defined $hash_parent) {
1043                 if (!is_valid_refname($hash_parent)) {
1044                         die_error(400, "Invalid hash parent parameter");
1045                 }
1046         }
1047
1048         our $hash_base = $input_params{'hash_base'};
1049         if (defined $hash_base) {
1050                 if (!is_valid_refname($hash_base)) {
1051                         die_error(400, "Invalid hash base parameter");
1052                 }
1053         }
1054
1055         our @extra_options = @{$input_params{'extra_options'}};
1056         # @extra_options is always defined, since it can only be (currently) set from
1057         # CGI, and $cgi->param() returns the empty array in array context if the param
1058         # is not set
1059         foreach my $opt (@extra_options) {
1060                 if (not exists $allowed_options{$opt}) {
1061                         die_error(400, "Invalid option parameter");
1062                 }
1063                 if (not grep(/^$action$/, @{$allowed_options{$opt}})) {
1064                         die_error(400, "Invalid option parameter for this action");
1065                 }
1066         }
1067
1068         our $hash_parent_base = $input_params{'hash_parent_base'};
1069         if (defined $hash_parent_base) {
1070                 if (!is_valid_refname($hash_parent_base)) {
1071                         die_error(400, "Invalid hash parent base parameter");
1072                 }
1073         }
1074
1075         # other parameters
1076         our $page = $input_params{'page'};
1077         if (defined $page) {
1078                 if ($page =~ m/[^0-9]/) {
1079                         die_error(400, "Invalid page parameter");
1080                 }
1081         }
1082
1083         our $searchtype = $input_params{'searchtype'};
1084         if (defined $searchtype) {
1085                 if ($searchtype =~ m/[^a-z]/) {
1086                         die_error(400, "Invalid searchtype parameter");
1087                 }
1088         }
1089
1090         our $search_use_regexp = $input_params{'search_use_regexp'};
1091
1092         our $searchtext = $input_params{'searchtext'};
1093         our $search_regexp = undef;
1094         if (defined $searchtext) {
1095                 if (length($searchtext) < 2) {
1096                         die_error(403, "At least two characters are required for search parameter");
1097                 }
1098                 if ($search_use_regexp) {
1099                         $search_regexp = $searchtext;
1100                         if (!eval { qr/$search_regexp/; 1; }) {
1101                                 (my $error = $@) =~ s/ at \S+ line \d+.*\n?//;
1102                                 die_error(400, "Invalid search regexp '$search_regexp'",
1103                                           esc_html($error));
1104                         }
1105                 } else {
1106                         $search_regexp = quotemeta $searchtext;
1107                 }
1108         }
1109 }
1110
1111 # path to the current git repository
1112 our $git_dir;
1113 sub evaluate_git_dir {
1114         our $git_dir = "$projectroot/$project" if $project;
1115 }
1116
1117 our (@snapshot_fmts, $git_avatar);
1118 sub configure_gitweb_features {
1119         # list of supported snapshot formats
1120         our @snapshot_fmts = gitweb_get_feature('snapshot');
1121         @snapshot_fmts = filter_snapshot_fmts(@snapshot_fmts);
1122
1123         # check that the avatar feature is set to a known provider name,
1124         # and for each provider check if the dependencies are satisfied.
1125         # if the provider name is invalid or the dependencies are not met,
1126         # reset $git_avatar to the empty string.
1127         our ($git_avatar) = gitweb_get_feature('avatar');
1128         if ($git_avatar eq 'gravatar') {
1129                 $git_avatar = '' unless (eval { require Digest::MD5; 1; });
1130         } elsif ($git_avatar eq 'picon') {
1131                 # no dependencies
1132         } else {
1133                 $git_avatar = '';
1134         }
1135 }
1136
1137 # custom error handler: 'die <message>' is Internal Server Error
1138 sub handle_errors_html {
1139         my $msg = shift; # it is already HTML escaped
1140
1141         # to avoid infinite loop where error occurs in die_error,
1142         # change handler to default handler, disabling handle_errors_html
1143         set_message("Error occurred when inside die_error:\n$msg");
1144
1145         # you cannot jump out of die_error when called as error handler;
1146         # the subroutine set via CGI::Carp::set_message is called _after_
1147         # HTTP headers are already written, so it cannot write them itself
1148         die_error(undef, undef, $msg, -error_handler => 1, -no_http_header => 1);
1149 }
1150 set_message(\&handle_errors_html);
1151
1152 # dispatch
1153 sub dispatch {
1154         if (!defined $action) {
1155                 if (defined $hash) {
1156                         $action = git_get_type($hash);
1157                         $action or die_error(404, "Object does not exist");
1158                 } elsif (defined $hash_base && defined $file_name) {
1159                         $action = git_get_type("$hash_base:$file_name");
1160                         $action or die_error(404, "File or directory does not exist");
1161                 } elsif (defined $project) {
1162                         $action = 'summary';
1163                 } else {
1164                         $action = 'project_list';
1165                 }
1166         }
1167         if (!defined($actions{$action})) {
1168                 die_error(400, "Unknown action");
1169         }
1170         if ($action !~ m/^(?:opml|project_list|project_index)$/ &&
1171             !$project) {
1172                 die_error(400, "Project needed");
1173         }
1174         $actions{$action}->();
1175 }
1176
1177 sub reset_timer {
1178         our $t0 = [ gettimeofday() ]
1179                 if defined $t0;
1180         our $number_of_git_cmds = 0;
1181 }
1182
1183 our $first_request = 1;
1184 sub run_request {
1185         reset_timer();
1186
1187         evaluate_uri();
1188         if ($first_request) {
1189                 evaluate_gitweb_config();
1190                 evaluate_git_version();
1191         }
1192         if ($per_request_config) {
1193                 if (ref($per_request_config) eq 'CODE') {
1194                         $per_request_config->();
1195                 } elsif (!$first_request) {
1196                         evaluate_gitweb_config();
1197                 }
1198         }
1199         check_loadavg();
1200
1201         # $projectroot and $projects_list might be set in gitweb config file
1202         $projects_list ||= $projectroot;
1203
1204         evaluate_query_params();
1205         evaluate_path_info();
1206         evaluate_and_validate_params();
1207         evaluate_git_dir();
1208
1209         configure_gitweb_features();
1210
1211         dispatch();
1212 }
1213
1214 our $is_last_request = sub { 1 };
1215 our ($pre_dispatch_hook, $post_dispatch_hook, $pre_listen_hook);
1216 our $CGI = 'CGI';
1217 our $cgi;
1218 sub configure_as_fcgi {
1219         require CGI::Fast;
1220         our $CGI = 'CGI::Fast';
1221
1222         my $request_number = 0;
1223         # let each child service 100 requests
1224         our $is_last_request = sub { ++$request_number > 100 };
1225 }
1226 sub evaluate_argv {
1227         my $script_name = $ENV{'SCRIPT_NAME'} || $ENV{'SCRIPT_FILENAME'} || __FILE__;
1228         configure_as_fcgi()
1229                 if $script_name =~ /\.fcgi$/;
1230
1231         return unless (@ARGV);
1232
1233         require Getopt::Long;
1234         Getopt::Long::GetOptions(
1235                 'fastcgi|fcgi|f' => \&configure_as_fcgi,
1236                 'nproc|n=i' => sub {
1237                         my ($arg, $val) = @_;
1238                         return unless eval { require FCGI::ProcManager; 1; };
1239                         my $proc_manager = FCGI::ProcManager->new({
1240                                 n_processes => $val,
1241                         });
1242                         our $pre_listen_hook    = sub { $proc_manager->pm_manage()        };
1243                         our $pre_dispatch_hook  = sub { $proc_manager->pm_pre_dispatch()  };
1244                         our $post_dispatch_hook = sub { $proc_manager->pm_post_dispatch() };
1245                 },
1246         );
1247 }
1248
1249 sub run {
1250         evaluate_argv();
1251
1252         $first_request = 1;
1253         $pre_listen_hook->()
1254                 if $pre_listen_hook;
1255
1256  REQUEST:
1257         while ($cgi = $CGI->new()) {
1258                 $pre_dispatch_hook->()
1259                         if $pre_dispatch_hook;
1260
1261                 run_request();
1262
1263                 $post_dispatch_hook->()
1264                         if $post_dispatch_hook;
1265                 $first_request = 0;
1266
1267                 last REQUEST if ($is_last_request->());
1268         }
1269
1270  DONE_GITWEB:
1271         1;
1272 }
1273
1274 run();
1275
1276 if (defined caller) {
1277         # wrapped in a subroutine processing requests,
1278         # e.g. mod_perl with ModPerl::Registry, or PSGI with Plack::App::WrapCGI
1279         return;
1280 } else {
1281         # pure CGI script, serving single request
1282         exit;
1283 }
1284
1285 ## ======================================================================
1286 ## action links
1287
1288 # possible values of extra options
1289 # -full => 0|1      - use absolute/full URL ($my_uri/$my_url as base)
1290 # -replay => 1      - start from a current view (replay with modifications)
1291 # -path_info => 0|1 - don't use/use path_info URL (if possible)
1292 # -anchor => ANCHOR - add #ANCHOR to end of URL, implies -replay if used alone
1293 sub href {
1294         my %params = @_;
1295         # default is to use -absolute url() i.e. $my_uri
1296         my $href = $params{-full} ? $my_url : $my_uri;
1297
1298         # implicit -replay, must be first of implicit params
1299         $params{-replay} = 1 if (keys %params == 1 && $params{-anchor});
1300
1301         $params{'project'} = $project unless exists $params{'project'};
1302
1303         if ($params{-replay}) {
1304                 while (my ($name, $symbol) = each %cgi_param_mapping) {
1305                         if (!exists $params{$name}) {
1306                                 $params{$name} = $input_params{$name};
1307                         }
1308                 }
1309         }
1310
1311         my $use_pathinfo = gitweb_check_feature('pathinfo');
1312         if (defined $params{'project'} &&
1313             (exists $params{-path_info} ? $params{-path_info} : $use_pathinfo)) {
1314                 # try to put as many parameters as possible in PATH_INFO:
1315                 #   - project name
1316                 #   - action
1317                 #   - hash_parent or hash_parent_base:/file_parent
1318                 #   - hash or hash_base:/filename
1319                 #   - the snapshot_format as an appropriate suffix
1320
1321                 # When the script is the root DirectoryIndex for the domain,
1322                 # $href here would be something like http://gitweb.example.com/
1323                 # Thus, we strip any trailing / from $href, to spare us double
1324                 # slashes in the final URL
1325                 $href =~ s,/$,,;
1326
1327                 # Then add the project name, if present
1328                 $href .= "/".esc_path_info($params{'project'});
1329                 delete $params{'project'};
1330
1331                 # since we destructively absorb parameters, we keep this
1332                 # boolean that remembers if we're handling a snapshot
1333                 my $is_snapshot = $params{'action'} eq 'snapshot';
1334
1335                 # Summary just uses the project path URL, any other action is
1336                 # added to the URL
1337                 if (defined $params{'action'}) {
1338                         $href .= "/".esc_path_info($params{'action'})
1339                                 unless $params{'action'} eq 'summary';
1340                         delete $params{'action'};
1341                 }
1342
1343                 # Next, we put hash_parent_base:/file_parent..hash_base:/file_name,
1344                 # stripping nonexistent or useless pieces
1345                 $href .= "/" if ($params{'hash_base'} || $params{'hash_parent_base'}
1346                         || $params{'hash_parent'} || $params{'hash'});
1347                 if (defined $params{'hash_base'}) {
1348                         if (defined $params{'hash_parent_base'}) {
1349                                 $href .= esc_path_info($params{'hash_parent_base'});
1350                                 # skip the file_parent if it's the same as the file_name
1351                                 if (defined $params{'file_parent'}) {
1352                                         if (defined $params{'file_name'} && $params{'file_parent'} eq $params{'file_name'}) {
1353                                                 delete $params{'file_parent'};
1354                                         } elsif ($params{'file_parent'} !~ /\.\./) {
1355                                                 $href .= ":/".esc_path_info($params{'file_parent'});
1356                                                 delete $params{'file_parent'};
1357                                         }
1358                                 }
1359                                 $href .= "..";
1360                                 delete $params{'hash_parent'};
1361                                 delete $params{'hash_parent_base'};
1362                         } elsif (defined $params{'hash_parent'}) {
1363                                 $href .= esc_path_info($params{'hash_parent'}). "..";
1364                                 delete $params{'hash_parent'};
1365                         }
1366
1367                         $href .= esc_path_info($params{'hash_base'});
1368                         if (defined $params{'file_name'} && $params{'file_name'} !~ /\.\./) {
1369                                 $href .= ":/".esc_path_info($params{'file_name'});
1370                                 delete $params{'file_name'};
1371                         }
1372                         delete $params{'hash'};
1373                         delete $params{'hash_base'};
1374                 } elsif (defined $params{'hash'}) {
1375                         $href .= esc_path_info($params{'hash'});
1376                         delete $params{'hash'};
1377                 }
1378
1379                 # If the action was a snapshot, we can absorb the
1380                 # snapshot_format parameter too
1381                 if ($is_snapshot) {
1382                         my $fmt = $params{'snapshot_format'};
1383                         # snapshot_format should always be defined when href()
1384                         # is called, but just in case some code forgets, we
1385                         # fall back to the default
1386                         $fmt ||= $snapshot_fmts[0];
1387                         $href .= $known_snapshot_formats{$fmt}{'suffix'};
1388                         delete $params{'snapshot_format'};
1389                 }
1390         }
1391
1392         # now encode the parameters explicitly
1393         my @result = ();
1394         for (my $i = 0; $i < @cgi_param_mapping; $i += 2) {
1395                 my ($name, $symbol) = ($cgi_param_mapping[$i], $cgi_param_mapping[$i+1]);
1396                 if (defined $params{$name}) {
1397                         if (ref($params{$name}) eq "ARRAY") {
1398                                 foreach my $par (@{$params{$name}}) {
1399                                         push @result, $symbol . "=" . esc_param($par);
1400                                 }
1401                         } else {
1402                                 push @result, $symbol . "=" . esc_param($params{$name});
1403                         }
1404                 }
1405         }
1406         $href .= "?" . join(';', @result) if scalar @result;
1407
1408         # final transformation: trailing spaces must be escaped (URI-encoded)
1409         $href =~ s/(\s+)$/CGI::escape($1)/e;
1410
1411         if ($params{-anchor}) {
1412                 $href .= "#".esc_param($params{-anchor});
1413         }
1414
1415         return $href;
1416 }
1417
1418
1419 ## ======================================================================
1420 ## validation, quoting/unquoting and escaping
1421
1422 sub is_valid_action {
1423         my $input = shift;
1424         return undef unless exists $actions{$input};
1425         return 1;
1426 }
1427
1428 sub is_valid_project {
1429         my $input = shift;
1430
1431         return unless defined $input;
1432         if (!is_valid_pathname($input) ||
1433                 !(-d "$projectroot/$input") ||
1434                 !check_export_ok("$projectroot/$input") ||
1435                 ($strict_export && !project_in_list($input))) {
1436                 return undef;
1437         } else {
1438                 return 1;
1439         }
1440 }
1441
1442 sub is_valid_pathname {
1443         my $input = shift;
1444
1445         return undef unless defined $input;
1446         # no '.' or '..' as elements of path, i.e. no '.' nor '..'
1447         # at the beginning, at the end, and between slashes.
1448         # also this catches doubled slashes
1449         if ($input =~ m!(^|/)(|\.|\.\.)(/|$)!) {
1450                 return undef;
1451         }
1452         # no null characters
1453         if ($input =~ m!\0!) {
1454                 return undef;
1455         }
1456         return 1;
1457 }
1458
1459 sub is_valid_ref_format {
1460         my $input = shift;
1461
1462         return undef unless defined $input;
1463         # restrictions on ref name according to git-check-ref-format
1464         if ($input =~ m!(/\.|\.\.|[\000-\040\177 ~^:?*\[]|/$)!) {
1465                 return undef;
1466         }
1467         return 1;
1468 }
1469
1470 sub is_valid_refname {
1471         my $input = shift;
1472
1473         return undef unless defined $input;
1474         # textual hashes are O.K.
1475         if ($input =~ m/^[0-9a-fA-F]{40}$/) {
1476                 return 1;
1477         }
1478         # it must be correct pathname
1479         is_valid_pathname($input) or return undef;
1480         # check git-check-ref-format restrictions
1481         is_valid_ref_format($input) or return undef;
1482         return 1;
1483 }
1484
1485 # decode sequences of octets in utf8 into Perl's internal form,
1486 # which is utf-8 with utf8 flag set if needed.  gitweb writes out
1487 # in utf-8 thanks to "binmode STDOUT, ':utf8'" at beginning
1488 sub to_utf8 {
1489         my $str = shift;
1490         return undef unless defined $str;
1491
1492         if (utf8::is_utf8($str) || utf8::decode($str)) {
1493                 return $str;
1494         } else {
1495                 return decode($fallback_encoding, $str, Encode::FB_DEFAULT);
1496         }
1497 }
1498
1499 # quote unsafe chars, but keep the slash, even when it's not
1500 # correct, but quoted slashes look too horrible in bookmarks
1501 sub esc_param {
1502         my $str = shift;
1503         return undef unless defined $str;
1504         $str =~ s/([^A-Za-z0-9\-_.~()\/:@ ]+)/CGI::escape($1)/eg;
1505         $str =~ s/ /\+/g;
1506         return $str;
1507 }
1508
1509 # the quoting rules for path_info fragment are slightly different
1510 sub esc_path_info {
1511         my $str = shift;
1512         return undef unless defined $str;
1513
1514         # path_info doesn't treat '+' as space (specially), but '?' must be escaped
1515         $str =~ s/([^A-Za-z0-9\-_.~();\/;:@&= +]+)/CGI::escape($1)/eg;
1516
1517         return $str;
1518 }
1519
1520 # quote unsafe chars in whole URL, so some characters cannot be quoted
1521 sub esc_url {
1522         my $str = shift;
1523         return undef unless defined $str;
1524         $str =~ s/([^A-Za-z0-9\-_.~();\/;?:@&= ]+)/CGI::escape($1)/eg;
1525         $str =~ s/ /\+/g;
1526         return $str;
1527 }
1528
1529 # quote unsafe characters in HTML attributes
1530 sub esc_attr {
1531
1532         # for XHTML conformance escaping '"' to '&quot;' is not enough
1533         return esc_html(@_);
1534 }
1535
1536 # replace invalid utf8 character with SUBSTITUTION sequence
1537 sub esc_html {
1538         my $str = shift;
1539         my %opts = @_;
1540
1541         return undef unless defined $str;
1542
1543         $str = to_utf8($str);
1544         $str = $cgi->escapeHTML($str);
1545         if ($opts{'-nbsp'}) {
1546                 $str =~ s/ /&nbsp;/g;
1547         }
1548         $str =~ s|([[:cntrl:]])|(($1 ne "\t") ? quot_cec($1) : $1)|eg;
1549         return $str;
1550 }
1551
1552 # quote control characters and escape filename to HTML
1553 sub esc_path {
1554         my $str = shift;
1555         my %opts = @_;
1556
1557         return undef unless defined $str;
1558
1559         $str = to_utf8($str);
1560         $str = $cgi->escapeHTML($str);
1561         if ($opts{'-nbsp'}) {
1562                 $str =~ s/ /&nbsp;/g;
1563         }
1564         $str =~ s|([[:cntrl:]])|quot_cec($1)|eg;
1565         return $str;
1566 }
1567
1568 # Sanitize for use in XHTML + application/xml+xhtm (valid XML 1.0)
1569 sub sanitize {
1570         my $str = shift;
1571
1572         return undef unless defined $str;
1573
1574         $str = to_utf8($str);
1575         $str =~ s|([[:cntrl:]])|(index("\t\n\r", $1) != -1 ? $1 : quot_cec($1))|eg;
1576         return $str;
1577 }
1578
1579 # Make control characters "printable", using character escape codes (CEC)
1580 sub quot_cec {
1581         my $cntrl = shift;
1582         my %opts = @_;
1583         my %es = ( # character escape codes, aka escape sequences
1584                 "\t" => '\t',   # tab            (HT)
1585                 "\n" => '\n',   # line feed      (LF)
1586                 "\r" => '\r',   # carrige return (CR)
1587                 "\f" => '\f',   # form feed      (FF)
1588                 "\b" => '\b',   # backspace      (BS)
1589                 "\a" => '\a',   # alarm (bell)   (BEL)
1590                 "\e" => '\e',   # escape         (ESC)
1591                 "\013" => '\v', # vertical tab   (VT)
1592                 "\000" => '\0', # nul character  (NUL)
1593         );
1594         my $chr = ( (exists $es{$cntrl})
1595                     ? $es{$cntrl}
1596                     : sprintf('\%2x', ord($cntrl)) );
1597         if ($opts{-nohtml}) {
1598                 return $chr;
1599         } else {
1600                 return "<span class=\"cntrl\">$chr</span>";
1601         }
1602 }
1603
1604 # Alternatively use unicode control pictures codepoints,
1605 # Unicode "printable representation" (PR)
1606 sub quot_upr {
1607         my $cntrl = shift;
1608         my %opts = @_;
1609
1610         my $chr = sprintf('&#%04d;', 0x2400+ord($cntrl));
1611         if ($opts{-nohtml}) {
1612                 return $chr;
1613         } else {
1614                 return "<span class=\"cntrl\">$chr</span>";
1615         }
1616 }
1617
1618 # git may return quoted and escaped filenames
1619 sub unquote {
1620         my $str = shift;
1621
1622         sub unq {
1623                 my $seq = shift;
1624                 my %es = ( # character escape codes, aka escape sequences
1625                         't' => "\t",   # tab            (HT, TAB)
1626                         'n' => "\n",   # newline        (NL)
1627                         'r' => "\r",   # return         (CR)
1628                         'f' => "\f",   # form feed      (FF)
1629                         'b' => "\b",   # backspace      (BS)
1630                         'a' => "\a",   # alarm (bell)   (BEL)
1631                         'e' => "\e",   # escape         (ESC)
1632                         'v' => "\013", # vertical tab   (VT)
1633                 );
1634
1635                 if ($seq =~ m/^[0-7]{1,3}$/) {
1636                         # octal char sequence
1637                         return chr(oct($seq));
1638                 } elsif (exists $es{$seq}) {
1639                         # C escape sequence, aka character escape code
1640                         return $es{$seq};
1641                 }
1642                 # quoted ordinary character
1643                 return $seq;
1644         }
1645
1646         if ($str =~ m/^"(.*)"$/) {
1647                 # needs unquoting
1648                 $str = $1;
1649                 $str =~ s/\\([^0-7]|[0-7]{1,3})/unq($1)/eg;
1650         }
1651         return $str;
1652 }
1653
1654 # escape tabs (convert tabs to spaces)
1655 sub untabify {
1656         my $line = shift;
1657
1658         while ((my $pos = index($line, "\t")) != -1) {
1659                 if (my $count = (8 - ($pos % 8))) {
1660                         my $spaces = ' ' x $count;
1661                         $line =~ s/\t/$spaces/;
1662                 }
1663         }
1664
1665         return $line;
1666 }
1667
1668 sub project_in_list {
1669         my $project = shift;
1670         my @list = git_get_projects_list();
1671         return @list && scalar(grep { $_->{'path'} eq $project } @list);
1672 }
1673
1674 ## ----------------------------------------------------------------------
1675 ## HTML aware string manipulation
1676
1677 # Try to chop given string on a word boundary between position
1678 # $len and $len+$add_len. If there is no word boundary there,
1679 # chop at $len+$add_len. Do not chop if chopped part plus ellipsis
1680 # (marking chopped part) would be longer than given string.
1681 sub chop_str {
1682         my $str = shift;
1683         my $len = shift;
1684         my $add_len = shift || 10;
1685         my $where = shift || 'right'; # 'left' | 'center' | 'right'
1686
1687         # Make sure perl knows it is utf8 encoded so we don't
1688         # cut in the middle of a utf8 multibyte char.
1689         $str = to_utf8($str);
1690
1691         # allow only $len chars, but don't cut a word if it would fit in $add_len
1692         # if it doesn't fit, cut it if it's still longer than the dots we would add
1693         # remove chopped character entities entirely
1694
1695         # when chopping in the middle, distribute $len into left and right part
1696         # return early if chopping wouldn't make string shorter
1697         if ($where eq 'center') {
1698                 return $str if ($len + 5 >= length($str)); # filler is length 5
1699                 $len = int($len/2);
1700         } else {
1701                 return $str if ($len + 4 >= length($str)); # filler is length 4
1702         }
1703
1704         # regexps: ending and beginning with word part up to $add_len
1705         my $endre = qr/.{$len}\w{0,$add_len}/;
1706         my $begre = qr/\w{0,$add_len}.{$len}/;
1707
1708         if ($where eq 'left') {
1709                 $str =~ m/^(.*?)($begre)$/;
1710                 my ($lead, $body) = ($1, $2);
1711                 if (length($lead) > 4) {
1712                         $lead = " ...";
1713                 }
1714                 return "$lead$body";
1715
1716         } elsif ($where eq 'center') {
1717                 $str =~ m/^($endre)(.*)$/;
1718                 my ($left, $str)  = ($1, $2);
1719                 $str =~ m/^(.*?)($begre)$/;
1720                 my ($mid, $right) = ($1, $2);
1721                 if (length($mid) > 5) {
1722                         $mid = " ... ";
1723                 }
1724                 return "$left$mid$right";
1725
1726         } else {
1727                 $str =~ m/^($endre)(.*)$/;
1728                 my $body = $1;
1729                 my $tail = $2;
1730                 if (length($tail) > 4) {
1731                         $tail = "... ";
1732                 }
1733                 return "$body$tail";
1734         }
1735 }
1736
1737 # takes the same arguments as chop_str, but also wraps a <span> around the
1738 # result with a title attribute if it does get chopped. Additionally, the
1739 # string is HTML-escaped.
1740 sub chop_and_escape_str {
1741         my ($str) = @_;
1742
1743         my $chopped = chop_str(@_);
1744         $str = to_utf8($str);
1745         if ($chopped eq $str) {
1746                 return esc_html($chopped);
1747         } else {
1748                 $str =~ s/[[:cntrl:]]/?/g;
1749                 return $cgi->span({-title=>$str}, esc_html($chopped));
1750         }
1751 }
1752
1753 # Highlight selected fragments of string, using given CSS class,
1754 # and escape HTML.  It is assumed that fragments do not overlap.
1755 # Regions are passed as list of pairs (array references).
1756 #
1757 # Example: esc_html_hl_regions("foobar", "mark", [ 0, 3 ]) returns
1758 # '<span class="mark">foo</span>bar'
1759 sub esc_html_hl_regions {
1760         my ($str, $css_class, @sel) = @_;
1761         my %opts = grep { ref($_) ne 'ARRAY' } @sel;
1762         @sel     = grep { ref($_) eq 'ARRAY' } @sel;
1763         return esc_html($str, %opts) unless @sel;
1764
1765         my $out = '';
1766         my $pos = 0;
1767
1768         for my $s (@sel) {
1769                 my ($begin, $end) = @$s;
1770
1771                 # Don't create empty <span> elements.
1772                 next if $end <= $begin;
1773
1774                 my $escaped = esc_html(substr($str, $begin, $end - $begin),
1775                                        %opts);
1776
1777                 $out .= esc_html(substr($str, $pos, $begin - $pos), %opts)
1778                         if ($begin - $pos > 0);
1779                 $out .= $cgi->span({-class => $css_class}, $escaped);
1780
1781                 $pos = $end;
1782         }
1783         $out .= esc_html(substr($str, $pos), %opts)
1784                 if ($pos < length($str));
1785
1786         return $out;
1787 }
1788
1789 # return positions of beginning and end of each match
1790 sub matchpos_list {
1791         my ($str, $regexp) = @_;
1792         return unless (defined $str && defined $regexp);
1793
1794         my @matches;
1795         while ($str =~ /$regexp/g) {
1796                 push @matches, [$-[0], $+[0]];
1797         }
1798         return @matches;
1799 }
1800
1801 # highlight match (if any), and escape HTML
1802 sub esc_html_match_hl {
1803         my ($str, $regexp) = @_;
1804         return esc_html($str) unless defined $regexp;
1805
1806         my @matches = matchpos_list($str, $regexp);
1807         return esc_html($str) unless @matches;
1808
1809         return esc_html_hl_regions($str, 'match', @matches);
1810 }
1811
1812
1813 # highlight match (if any) of shortened string, and escape HTML
1814 sub esc_html_match_hl_chopped {
1815         my ($str, $chopped, $regexp) = @_;
1816         return esc_html_match_hl($str, $regexp) unless defined $chopped;
1817
1818         my @matches = matchpos_list($str, $regexp);
1819         return esc_html($chopped) unless @matches;
1820
1821         # filter matches so that we mark chopped string
1822         my $tail = "... "; # see chop_str
1823         unless ($chopped =~ s/\Q$tail\E$//) {
1824                 $tail = '';
1825         }
1826         my $chop_len = length($chopped);
1827         my $tail_len = length($tail);
1828         my @filtered;
1829
1830         for my $m (@matches) {
1831                 if ($m->[0] > $chop_len) {
1832                         push @filtered, [ $chop_len, $chop_len + $tail_len ] if ($tail_len > 0);
1833                         last;
1834                 } elsif ($m->[1] > $chop_len) {
1835                         push @filtered, [ $m->[0], $chop_len + $tail_len ];
1836                         last;
1837                 }
1838                 push @filtered, $m;
1839         }
1840
1841         return esc_html_hl_regions($chopped . $tail, 'match', @filtered);
1842 }
1843
1844 ## ----------------------------------------------------------------------
1845 ## functions returning short strings
1846
1847 # CSS class for given age value (in seconds)
1848 sub age_class {
1849         my $age = shift;
1850
1851         if (!defined $age) {
1852                 return "noage";
1853         } elsif ($age < 60*60*2) {
1854                 return "age0";
1855         } elsif ($age < 60*60*24*2) {
1856                 return "age1";
1857         } else {
1858                 return "age2";
1859         }
1860 }
1861
1862 # convert age in seconds to "nn units ago" string
1863 sub age_string {
1864         my $age = shift;
1865         my $age_str;
1866
1867         if ($age > 60*60*24*365*2) {
1868                 $age_str = (int $age/60/60/24/365);
1869                 $age_str .= " years ago";
1870         } elsif ($age > 60*60*24*(365/12)*2) {
1871                 $age_str = int $age/60/60/24/(365/12);
1872                 $age_str .= " months ago";
1873         } elsif ($age > 60*60*24*7*2) {
1874                 $age_str = int $age/60/60/24/7;
1875                 $age_str .= " weeks ago";
1876         } elsif ($age > 60*60*24*2) {
1877                 $age_str = int $age/60/60/24;
1878                 $age_str .= " days ago";
1879         } elsif ($age > 60*60*2) {
1880                 $age_str = int $age/60/60;
1881                 $age_str .= " hours ago";
1882         } elsif ($age > 60*2) {
1883                 $age_str = int $age/60;
1884                 $age_str .= " min ago";
1885         } elsif ($age > 2) {
1886                 $age_str = int $age;
1887                 $age_str .= " sec ago";
1888         } else {
1889                 $age_str .= " right now";
1890         }
1891         return $age_str;
1892 }
1893
1894 use constant {
1895         S_IFINVALID => 0030000,
1896         S_IFGITLINK => 0160000,
1897 };
1898
1899 # submodule/subproject, a commit object reference
1900 sub S_ISGITLINK {
1901         my $mode = shift;
1902
1903         return (($mode & S_IFMT) == S_IFGITLINK)
1904 }
1905
1906 # convert file mode in octal to symbolic file mode string
1907 sub mode_str {
1908         my $mode = oct shift;
1909
1910         if (S_ISGITLINK($mode)) {
1911                 return 'm---------';
1912         } elsif (S_ISDIR($mode & S_IFMT)) {
1913                 return 'drwxr-xr-x';
1914         } elsif (S_ISLNK($mode)) {
1915                 return 'lrwxrwxrwx';
1916         } elsif (S_ISREG($mode)) {
1917                 # git cares only about the executable bit
1918                 if ($mode & S_IXUSR) {
1919                         return '-rwxr-xr-x';
1920                 } else {
1921                         return '-rw-r--r--';
1922                 };
1923         } else {
1924                 return '----------';
1925         }
1926 }
1927
1928 # convert file mode in octal to file type string
1929 sub file_type {
1930         my $mode = shift;
1931
1932         if ($mode !~ m/^[0-7]+$/) {
1933                 return $mode;
1934         } else {
1935                 $mode = oct $mode;
1936         }
1937
1938         if (S_ISGITLINK($mode)) {
1939                 return "submodule";
1940         } elsif (S_ISDIR($mode & S_IFMT)) {
1941                 return "directory";
1942         } elsif (S_ISLNK($mode)) {
1943                 return "symlink";
1944         } elsif (S_ISREG($mode)) {
1945                 return "file";
1946         } else {
1947                 return "unknown";
1948         }
1949 }
1950
1951 # convert file mode in octal to file type description string
1952 sub file_type_long {
1953         my $mode = shift;
1954
1955         if ($mode !~ m/^[0-7]+$/) {
1956                 return $mode;
1957         } else {
1958                 $mode = oct $mode;
1959         }
1960
1961         if (S_ISGITLINK($mode)) {
1962                 return "submodule";
1963         } elsif (S_ISDIR($mode & S_IFMT)) {
1964                 return "directory";
1965         } elsif (S_ISLNK($mode)) {
1966                 return "symlink";
1967         } elsif (S_ISREG($mode)) {
1968                 if ($mode & S_IXUSR) {
1969                         return "executable";
1970                 } else {
1971                         return "file";
1972                 };
1973         } else {
1974                 return "unknown";
1975         }
1976 }
1977
1978
1979 ## ----------------------------------------------------------------------
1980 ## functions returning short HTML fragments, or transforming HTML fragments
1981 ## which don't belong to other sections
1982
1983 # format line of commit message.
1984 sub format_log_line_html {
1985         my $line = shift;
1986
1987         $line = esc_html($line, -nbsp=>1);
1988         $line =~ s{\b([0-9a-fA-F]{8,40})\b}{
1989                 $cgi->a({-href => href(action=>"object", hash=>$1),
1990                                         -class => "text"}, $1);
1991         }eg;
1992
1993         return $line;
1994 }
1995
1996 # format marker of refs pointing to given object
1997
1998 # the destination action is chosen based on object type and current context:
1999 # - for annotated tags, we choose the tag view unless it's the current view
2000 #   already, in which case we go to shortlog view
2001 # - for other refs, we keep the current view if we're in history, shortlog or
2002 #   log view, and select shortlog otherwise
2003 sub format_ref_marker {
2004         my ($refs, $id) = @_;
2005         my $markers = '';
2006
2007         if (defined $refs->{$id}) {
2008                 foreach my $ref (@{$refs->{$id}}) {
2009                         # this code exploits the fact that non-lightweight tags are the
2010                         # only indirect objects, and that they are the only objects for which
2011                         # we want to use tag instead of shortlog as action
2012                         my ($type, $name) = qw();
2013                         my $indirect = ($ref =~ s/\^\{\}$//);
2014                         # e.g. tags/v2.6.11 or heads/next
2015                         if ($ref =~ m!^(.*?)s?/(.*)$!) {
2016                                 $type = $1;
2017                                 $name = $2;
2018                         } else {
2019                                 $type = "ref";
2020                                 $name = $ref;
2021                         }
2022
2023                         my $class = $type;
2024                         $class .= " indirect" if $indirect;
2025
2026                         my $dest_action = "shortlog";
2027
2028                         if ($indirect) {
2029                                 $dest_action = "tag" unless $action eq "tag";
2030                         } elsif ($action =~ /^(history|(short)?log)$/) {
2031                                 $dest_action = $action;
2032                         }
2033
2034                         my $dest = "";
2035                         $dest .= "refs/" unless $ref =~ m!^refs/!;
2036                         $dest .= $ref;
2037
2038                         my $link = $cgi->a({
2039                                 -href => href(
2040                                         action=>$dest_action,
2041                                         hash=>$dest
2042                                 )}, $name);
2043
2044                         $markers .= " <span class=\"".esc_attr($class)."\" title=\"".esc_attr($ref)."\">" .
2045                                 $link . "</span>";
2046                 }
2047         }
2048
2049         if ($markers) {
2050                 return ' <span class="refs">'. $markers . '</span>';
2051         } else {
2052                 return "";
2053         }
2054 }
2055
2056 # format, perhaps shortened and with markers, title line
2057 sub format_subject_html {
2058         my ($long, $short, $href, $extra) = @_;
2059         $extra = '' unless defined($extra);
2060
2061         if (length($short) < length($long)) {
2062                 $long =~ s/[[:cntrl:]]/?/g;
2063                 return $cgi->a({-href => $href, -class => "list subject",
2064                                 -title => to_utf8($long)},
2065                        esc_html($short)) . $extra;
2066         } else {
2067                 return $cgi->a({-href => $href, -class => "list subject"},
2068                        esc_html($long)) . $extra;
2069         }
2070 }
2071
2072 # Rather than recomputing the url for an email multiple times, we cache it
2073 # after the first hit. This gives a visible benefit in views where the avatar
2074 # for the same email is used repeatedly (e.g. shortlog).
2075 # The cache is shared by all avatar engines (currently gravatar only), which
2076 # are free to use it as preferred. Since only one avatar engine is used for any
2077 # given page, there's no risk for cache conflicts.
2078 our %avatar_cache = ();
2079
2080 # Compute the picon url for a given email, by using the picon search service over at
2081 # http://www.cs.indiana.edu/picons/search.html
2082 sub picon_url {
2083         my $email = lc shift;
2084         if (!$avatar_cache{$email}) {
2085                 my ($user, $domain) = split('@', $email);
2086                 $avatar_cache{$email} =
2087                         "//www.cs.indiana.edu/cgi-pub/kinzler/piconsearch.cgi/" .
2088                         "$domain/$user/" .
2089                         "users+domains+unknown/up/single";
2090         }
2091         return $avatar_cache{$email};
2092 }
2093
2094 # Compute the gravatar url for a given email, if it's not in the cache already.
2095 # Gravatar stores only the part of the URL before the size, since that's the
2096 # one computationally more expensive. This also allows reuse of the cache for
2097 # different sizes (for this particular engine).
2098 sub gravatar_url {
2099         my $email = lc shift;
2100         my $size = shift;
2101         $avatar_cache{$email} ||=
2102                 "//www.gravatar.com/avatar/" .
2103                         Digest::MD5::md5_hex($email) . "?s=";
2104         return $avatar_cache{$email} . $size;
2105 }
2106
2107 # Insert an avatar for the given $email at the given $size if the feature
2108 # is enabled.
2109 sub git_get_avatar {
2110         my ($email, %opts) = @_;
2111         my $pre_white  = ($opts{-pad_before} ? "&nbsp;" : "");
2112         my $post_white = ($opts{-pad_after}  ? "&nbsp;" : "");
2113         $opts{-size} ||= 'default';
2114         my $size = $avatar_size{$opts{-size}} || $avatar_size{'default'};
2115         my $url = "";
2116         if ($git_avatar eq 'gravatar') {
2117                 $url = gravatar_url($email, $size);
2118         } elsif ($git_avatar eq 'picon') {
2119                 $url = picon_url($email);
2120         }
2121         # Other providers can be added by extending the if chain, defining $url
2122         # as needed. If no variant puts something in $url, we assume avatars
2123         # are completely disabled/unavailable.
2124         if ($url) {
2125                 return $pre_white .
2126                        "<img width=\"$size\" " .
2127                             "class=\"avatar\" " .
2128                             "src=\"".esc_url($url)."\" " .
2129                             "alt=\"\" " .
2130                        "/>" . $post_white;
2131         } else {
2132                 return "";
2133         }
2134 }
2135
2136 sub format_search_author {
2137         my ($author, $searchtype, $displaytext) = @_;
2138         my $have_search = gitweb_check_feature('search');
2139
2140         if ($have_search) {
2141                 my $performed = "";
2142                 if ($searchtype eq 'author') {
2143                         $performed = "authored";
2144                 } elsif ($searchtype eq 'committer') {
2145                         $performed = "committed";
2146                 }
2147
2148                 return $cgi->a({-href => href(action=>"search", hash=>$hash,
2149                                 searchtext=>$author,
2150                                 searchtype=>$searchtype), class=>"list",
2151                                 title=>"Search for commits $performed by $author"},
2152                                 $displaytext);
2153
2154         } else {
2155                 return $displaytext;
2156         }
2157 }
2158
2159 # format the author name of the given commit with the given tag
2160 # the author name is chopped and escaped according to the other
2161 # optional parameters (see chop_str).
2162 sub format_author_html {
2163         my $tag = shift;
2164         my $co = shift;
2165         my $author = chop_and_escape_str($co->{'author_name'}, @_);
2166         return "<$tag class=\"author\">" .
2167                format_search_author($co->{'author_name'}, "author",
2168                        git_get_avatar($co->{'author_email'}, -pad_after => 1) .
2169                        $author) .
2170                "</$tag>";
2171 }
2172
2173 # format git diff header line, i.e. "diff --(git|combined|cc) ..."
2174 sub format_git_diff_header_line {
2175         my $line = shift;
2176         my $diffinfo = shift;
2177         my ($from, $to) = @_;
2178
2179         if ($diffinfo->{'nparents'}) {
2180                 # combined diff
2181                 $line =~ s!^(diff (.*?) )"?.*$!$1!;
2182                 if ($to->{'href'}) {
2183                         $line .= $cgi->a({-href => $to->{'href'}, -class => "path"},
2184                                          esc_path($to->{'file'}));
2185                 } else { # file was deleted (no href)
2186                         $line .= esc_path($to->{'file'});
2187                 }
2188         } else {
2189                 # "ordinary" diff
2190                 $line =~ s!^(diff (.*?) )"?a/.*$!$1!;
2191                 if ($from->{'href'}) {
2192                         $line .= $cgi->a({-href => $from->{'href'}, -class => "path"},
2193                                          'a/' . esc_path($from->{'file'}));
2194                 } else { # file was added (no href)
2195                         $line .= 'a/' . esc_path($from->{'file'});
2196                 }
2197                 $line .= ' ';
2198                 if ($to->{'href'}) {
2199                         $line .= $cgi->a({-href => $to->{'href'}, -class => "path"},
2200                                          'b/' . esc_path($to->{'file'}));
2201                 } else { # file was deleted
2202                         $line .= 'b/' . esc_path($to->{'file'});
2203                 }
2204         }
2205
2206         return "<div class=\"diff header\">$line</div>\n";
2207 }
2208
2209 # format extended diff header line, before patch itself
2210 sub format_extended_diff_header_line {
2211         my $line = shift;
2212         my $diffinfo = shift;
2213         my ($from, $to) = @_;
2214
2215         # match <path>
2216         if ($line =~ s!^((copy|rename) from ).*$!$1! && $from->{'href'}) {
2217                 $line .= $cgi->a({-href=>$from->{'href'}, -class=>"path"},
2218                                        esc_path($from->{'file'}));
2219         }
2220         if ($line =~ s!^((copy|rename) to ).*$!$1! && $to->{'href'}) {
2221                 $line .= $cgi->a({-href=>$to->{'href'}, -class=>"path"},
2222                                  esc_path($to->{'file'}));
2223         }
2224         # match single <mode>
2225         if ($line =~ m/\s(\d{6})$/) {
2226                 $line .= '<span class="info"> (' .
2227                          file_type_long($1) .
2228                          ')</span>';
2229         }
2230         # match <hash>
2231         if ($line =~ m/^index [0-9a-fA-F]{40},[0-9a-fA-F]{40}/) {
2232                 # can match only for combined diff
2233                 $line = 'index ';
2234                 for (my $i = 0; $i < $diffinfo->{'nparents'}; $i++) {
2235                         if ($from->{'href'}[$i]) {
2236                                 $line .= $cgi->a({-href=>$from->{'href'}[$i],
2237                                                   -class=>"hash"},
2238                                                  substr($diffinfo->{'from_id'}[$i],0,7));
2239                         } else {
2240                                 $line .= '0' x 7;
2241                         }
2242                         # separator
2243                         $line .= ',' if ($i < $diffinfo->{'nparents'} - 1);
2244                 }
2245                 $line .= '..';
2246                 if ($to->{'href'}) {
2247                         $line .= $cgi->a({-href=>$to->{'href'}, -class=>"hash"},
2248                                          substr($diffinfo->{'to_id'},0,7));
2249                 } else {
2250                         $line .= '0' x 7;
2251                 }
2252
2253         } elsif ($line =~ m/^index [0-9a-fA-F]{40}..[0-9a-fA-F]{40}/) {
2254                 # can match only for ordinary diff
2255                 my ($from_link, $to_link);
2256                 if ($from->{'href'}) {
2257                         $from_link = $cgi->a({-href=>$from->{'href'}, -class=>"hash"},
2258                                              substr($diffinfo->{'from_id'},0,7));
2259                 } else {
2260                         $from_link = '0' x 7;
2261                 }
2262                 if ($to->{'href'}) {
2263                         $to_link = $cgi->a({-href=>$to->{'href'}, -class=>"hash"},
2264                                            substr($diffinfo->{'to_id'},0,7));
2265                 } else {
2266                         $to_link = '0' x 7;
2267                 }
2268                 my ($from_id, $to_id) = ($diffinfo->{'from_id'}, $diffinfo->{'to_id'});
2269                 $line =~ s!$from_id\.\.$to_id!$from_link..$to_link!;
2270         }
2271
2272         return $line . "<br/>\n";
2273 }
2274
2275 # format from-file/to-file diff header
2276 sub format_diff_from_to_header {
2277         my ($from_line, $to_line, $diffinfo, $from, $to, @parents) = @_;
2278         my $line;
2279         my $result = '';
2280
2281         $line = $from_line;
2282         #assert($line =~ m/^---/) if DEBUG;
2283         # no extra formatting for "^--- /dev/null"
2284         if (! $diffinfo->{'nparents'}) {
2285                 # ordinary (single parent) diff
2286                 if ($line =~ m!^--- "?a/!) {
2287                         if ($from->{'href'}) {
2288                                 $line = '--- a/' .
2289                                         $cgi->a({-href=>$from->{'href'}, -class=>"path"},
2290                                                 esc_path($from->{'file'}));
2291                         } else {
2292                                 $line = '--- a/' .
2293                                         esc_path($from->{'file'});
2294                         }
2295                 }
2296                 $result .= qq!<div class="diff from_file">$line</div>\n!;
2297
2298         } else {
2299                 # combined diff (merge commit)
2300                 for (my $i = 0; $i < $diffinfo->{'nparents'}; $i++) {
2301                         if ($from->{'href'}[$i]) {
2302                                 $line = '--- ' .
2303                                         $cgi->a({-href=>href(action=>"blobdiff",
2304                                                              hash_parent=>$diffinfo->{'from_id'}[$i],
2305                                                              hash_parent_base=>$parents[$i],
2306                                                              file_parent=>$from->{'file'}[$i],
2307                                                              hash=>$diffinfo->{'to_id'},
2308                                                              hash_base=>$hash,
2309                                                              file_name=>$to->{'file'}),
2310                                                  -class=>"path",
2311                                                  -title=>"diff" . ($i+1)},
2312                                                 $i+1) .
2313                                         '/' .
2314                                         $cgi->a({-href=>$from->{'href'}[$i], -class=>"path"},
2315                                                 esc_path($from->{'file'}[$i]));
2316                         } else {
2317                                 $line = '--- /dev/null';
2318                         }
2319                         $result .= qq!<div class="diff from_file">$line</div>\n!;
2320                 }
2321         }
2322
2323         $line = $to_line;
2324         #assert($line =~ m/^\+\+\+/) if DEBUG;
2325         # no extra formatting for "^+++ /dev/null"
2326         if ($line =~ m!^\+\+\+ "?b/!) {
2327                 if ($to->{'href'}) {
2328                         $line = '+++ b/' .
2329                                 $cgi->a({-href=>$to->{'href'}, -class=>"path"},
2330                                         esc_path($to->{'file'}));
2331                 } else {
2332                         $line = '+++ b/' .
2333                                 esc_path($to->{'file'});
2334                 }
2335         }
2336         $result .= qq!<div class="diff to_file">$line</div>\n!;
2337
2338         return $result;
2339 }
2340
2341 # create note for patch simplified by combined diff
2342 sub format_diff_cc_simplified {
2343         my ($diffinfo, @parents) = @_;
2344         my $result = '';
2345
2346         $result .= "<div class=\"diff header\">" .
2347                    "diff --cc ";
2348         if (!is_deleted($diffinfo)) {
2349                 $result .= $cgi->a({-href => href(action=>"blob",
2350                                                   hash_base=>$hash,
2351                                                   hash=>$diffinfo->{'to_id'},
2352                                                   file_name=>$diffinfo->{'to_file'}),
2353                                     -class => "path"},
2354                                    esc_path($diffinfo->{'to_file'}));
2355         } else {
2356                 $result .= esc_path($diffinfo->{'to_file'});
2357         }
2358         $result .= "</div>\n" . # class="diff header"
2359                    "<div class=\"diff nodifferences\">" .
2360                    "Simple merge" .
2361                    "</div>\n"; # class="diff nodifferences"
2362
2363         return $result;
2364 }
2365
2366 sub diff_line_class {
2367         my ($line, $from, $to) = @_;
2368
2369         # ordinary diff
2370         my $num_sign = 1;
2371         # combined diff
2372         if ($from && $to && ref($from->{'href'}) eq "ARRAY") {
2373                 $num_sign = scalar @{$from->{'href'}};
2374         }
2375
2376         my @diff_line_classifier = (
2377                 { regexp => qr/^\@\@{$num_sign} /, class => "chunk_header"},
2378                 { regexp => qr/^\\/,               class => "incomplete"  },
2379                 { regexp => qr/^ {$num_sign}/,     class => "ctx" },
2380                 # classifier for context must come before classifier add/rem,
2381                 # or we would have to use more complicated regexp, for example
2382                 # qr/(?= {0,$m}\+)[+ ]{$num_sign}/, where $m = $num_sign - 1;
2383                 { regexp => qr/^[+ ]{$num_sign}/,   class => "add" },
2384                 { regexp => qr/^[- ]{$num_sign}/,   class => "rem" },
2385         );
2386         for my $clsfy (@diff_line_classifier) {
2387                 return $clsfy->{'class'}
2388                         if ($line =~ $clsfy->{'regexp'});
2389         }
2390
2391         # fallback
2392         return "";
2393 }
2394
2395 # assumes that $from and $to are defined and correctly filled,
2396 # and that $line holds a line of chunk header for unified diff
2397 sub format_unidiff_chunk_header {
2398         my ($line, $from, $to) = @_;
2399
2400         my ($from_text, $from_start, $from_lines, $to_text, $to_start, $to_lines, $section) =
2401                 $line =~ m/^\@{2} (-(\d+)(?:,(\d+))?) (\+(\d+)(?:,(\d+))?) \@{2}(.*)$/;
2402
2403         $from_lines = 0 unless defined $from_lines;
2404         $to_lines   = 0 unless defined $to_lines;
2405
2406         if ($from->{'href'}) {
2407                 $from_text = $cgi->a({-href=>"$from->{'href'}#l$from_start",
2408                                      -class=>"list"}, $from_text);
2409         }
2410         if ($to->{'href'}) {
2411                 $to_text   = $cgi->a({-href=>"$to->{'href'}#l$to_start",
2412                                      -class=>"list"}, $to_text);
2413         }
2414         $line = "<span class=\"chunk_info\">@@ $from_text $to_text @@</span>" .
2415                 "<span class=\"section\">" . esc_html($section, -nbsp=>1) . "</span>";
2416         return $line;
2417 }
2418
2419 # assumes that $from and $to are defined and correctly filled,
2420 # and that $line holds a line of chunk header for combined diff
2421 sub format_cc_diff_chunk_header {
2422         my ($line, $from, $to) = @_;
2423
2424         my ($prefix, $ranges, $section) = $line =~ m/^(\@+) (.*?) \@+(.*)$/;
2425         my (@from_text, @from_start, @from_nlines, $to_text, $to_start, $to_nlines);
2426
2427         @from_text = split(' ', $ranges);
2428         for (my $i = 0; $i < @from_text; ++$i) {
2429                 ($from_start[$i], $from_nlines[$i]) =
2430                         (split(',', substr($from_text[$i], 1)), 0);
2431         }
2432
2433         $to_text   = pop @from_text;
2434         $to_start  = pop @from_start;
2435         $to_nlines = pop @from_nlines;
2436
2437         $line = "<span class=\"chunk_info\">$prefix ";
2438         for (my $i = 0; $i < @from_text; ++$i) {
2439                 if ($from->{'href'}[$i]) {
2440                         $line .= $cgi->a({-href=>"$from->{'href'}[$i]#l$from_start[$i]",
2441                                           -class=>"list"}, $from_text[$i]);
2442                 } else {
2443                         $line .= $from_text[$i];
2444                 }
2445                 $line .= " ";
2446         }
2447         if ($to->{'href'}) {
2448                 $line .= $cgi->a({-href=>"$to->{'href'}#l$to_start",
2449                                   -class=>"list"}, $to_text);
2450         } else {
2451                 $line .= $to_text;
2452         }
2453         $line .= " $prefix</span>" .
2454                  "<span class=\"section\">" . esc_html($section, -nbsp=>1) . "</span>";
2455         return $line;
2456 }
2457
2458 # process patch (diff) line (not to be used for diff headers),
2459 # returning HTML-formatted (but not wrapped) line.
2460 # If the line is passed as a reference, it is treated as HTML and not
2461 # esc_html()'ed.
2462 sub format_diff_line {
2463         my ($line, $diff_class, $from, $to) = @_;
2464
2465         if (ref($line)) {
2466                 $line = $$line;
2467         } else {
2468                 chomp $line;
2469                 $line = untabify($line);
2470
2471                 if ($from && $to && $line =~ m/^\@{2} /) {
2472                         $line = format_unidiff_chunk_header($line, $from, $to);
2473                 } elsif ($from && $to && $line =~ m/^\@{3}/) {
2474                         $line = format_cc_diff_chunk_header($line, $from, $to);
2475                 } else {
2476                         $line = esc_html($line, -nbsp=>1);
2477                 }
2478         }
2479
2480         my $diff_classes = "diff";
2481         $diff_classes .= " $diff_class" if ($diff_class);
2482         $line = "<div class=\"$diff_classes\">$line</div>\n";
2483
2484         return $line;
2485 }
2486
2487 # Generates undef or something like "_snapshot_" or "snapshot (_tbz2_ _zip_)",
2488 # linked.  Pass the hash of the tree/commit to snapshot.
2489 sub format_snapshot_links {
2490         my ($hash) = @_;
2491         my $num_fmts = @snapshot_fmts;
2492         if ($num_fmts > 1) {
2493                 # A parenthesized list of links bearing format names.
2494                 # e.g. "snapshot (_tar.gz_ _zip_)"
2495                 return "snapshot (" . join(' ', map
2496                         $cgi->a({
2497                                 -href => href(
2498                                         action=>"snapshot",
2499                                         hash=>$hash,
2500                                         snapshot_format=>$_
2501                                 )
2502                         }, $known_snapshot_formats{$_}{'display'})
2503                 , @snapshot_fmts) . ")";
2504         } elsif ($num_fmts == 1) {
2505                 # A single "snapshot" link whose tooltip bears the format name.
2506                 # i.e. "_snapshot_"
2507                 my ($fmt) = @snapshot_fmts;
2508                 return
2509                         $cgi->a({
2510                                 -href => href(
2511                                         action=>"snapshot",
2512                                         hash=>$hash,
2513                                         snapshot_format=>$fmt
2514                                 ),
2515                                 -title => "in format: $known_snapshot_formats{$fmt}{'display'}"
2516                         }, "snapshot");
2517         } else { # $num_fmts == 0
2518                 return undef;
2519         }
2520 }
2521
2522 ## ......................................................................
2523 ## functions returning values to be passed, perhaps after some
2524 ## transformation, to other functions; e.g. returning arguments to href()
2525
2526 # returns hash to be passed to href to generate gitweb URL
2527 # in -title key it returns description of link
2528 sub get_feed_info {
2529         my $format = shift || 'Atom';
2530         my %res = (action => lc($format));
2531
2532         # feed links are possible only for project views
2533         return unless (defined $project);
2534         # some views should link to OPML, or to generic project feed,
2535         # or don't have specific feed yet (so they should use generic)
2536         return if (!$action || $action =~ /^(?:tags|heads|forks|tag|search)$/x);
2537
2538         my $branch;
2539         # branches refs uses 'refs/heads/' prefix (fullname) to differentiate
2540         # from tag links; this also makes possible to detect branch links
2541         if ((defined $hash_base && $hash_base =~ m!^refs/heads/(.*)$!) ||
2542             (defined $hash      && $hash      =~ m!^refs/heads/(.*)$!)) {
2543                 $branch = $1;
2544         }
2545         # find log type for feed description (title)
2546         my $type = 'log';
2547         if (defined $file_name) {
2548                 $type  = "history of $file_name";
2549                 $type .= "/" if ($action eq 'tree');
2550                 $type .= " on '$branch'" if (defined $branch);
2551         } else {
2552                 $type = "log of $branch" if (defined $branch);
2553         }
2554
2555         $res{-title} = $type;
2556         $res{'hash'} = (defined $branch ? "refs/heads/$branch" : undef);
2557         $res{'file_name'} = $file_name;
2558
2559         return %res;
2560 }
2561
2562 ## ----------------------------------------------------------------------
2563 ## git utility subroutines, invoking git commands
2564
2565 # returns path to the core git executable and the --git-dir parameter as list
2566 sub git_cmd {
2567         $number_of_git_cmds++;
2568         return $GIT, '--git-dir='.$git_dir;
2569 }
2570
2571 # quote the given arguments for passing them to the shell
2572 # quote_command("command", "arg 1", "arg with ' and ! characters")
2573 # => "'command' 'arg 1' 'arg with '\'' and '\!' characters'"
2574 # Try to avoid using this function wherever possible.
2575 sub quote_command {
2576         return join(' ',
2577                 map { my $a = $_; $a =~ s/(['!])/'\\$1'/g; "'$a'" } @_ );
2578 }
2579
2580 # get HEAD ref of given project as hash
2581 sub git_get_head_hash {
2582         return git_get_full_hash(shift, 'HEAD');
2583 }
2584
2585 sub git_get_full_hash {
2586         return git_get_hash(@_);
2587 }
2588
2589 sub git_get_short_hash {
2590         return git_get_hash(@_, '--short=7');
2591 }
2592
2593 sub git_get_hash {
2594         my ($project, $hash, @options) = @_;
2595         my $o_git_dir = $git_dir;
2596         my $retval = undef;
2597         $git_dir = "$projectroot/$project";
2598         if (open my $fd, '-|', git_cmd(), 'rev-parse',
2599             '--verify', '-q', @options, $hash) {
2600                 $retval = <$fd>;
2601                 chomp $retval if defined $retval;
2602                 close $fd;
2603         }
2604         if (defined $o_git_dir) {
2605                 $git_dir = $o_git_dir;
2606         }
2607         return $retval;
2608 }
2609
2610 # get type of given object
2611 sub git_get_type {
2612         my $hash = shift;
2613
2614         open my $fd, "-|", git_cmd(), "cat-file", '-t', $hash or return;
2615         my $type = <$fd>;
2616         close $fd or return;
2617         chomp $type;
2618         return $type;
2619 }
2620
2621 # repository configuration
2622 our $config_file = '';
2623 our %config;
2624
2625 # store multiple values for single key as anonymous array reference
2626 # single values stored directly in the hash, not as [ <value> ]
2627 sub hash_set_multi {
2628         my ($hash, $key, $value) = @_;
2629
2630         if (!exists $hash->{$key}) {
2631                 $hash->{$key} = $value;
2632         } elsif (!ref $hash->{$key}) {
2633                 $hash->{$key} = [ $hash->{$key}, $value ];
2634         } else {
2635                 push @{$hash->{$key}}, $value;
2636         }
2637 }
2638
2639 # return hash of git project configuration
2640 # optionally limited to some section, e.g. 'gitweb'
2641 sub git_parse_project_config {
2642         my $section_regexp = shift;
2643         my %config;
2644
2645         local $/ = "\0";
2646
2647         open my $fh, "-|", git_cmd(), "config", '-z', '-l',
2648                 or return;
2649
2650         while (my $keyval = <$fh>) {
2651                 chomp $keyval;
2652                 my ($key, $value) = split(/\n/, $keyval, 2);
2653
2654                 hash_set_multi(\%config, $key, $value)
2655                         if (!defined $section_regexp || $key =~ /^(?:$section_regexp)\./o);
2656         }
2657         close $fh;
2658
2659         return %config;
2660 }
2661
2662 # convert config value to boolean: 'true' or 'false'
2663 # no value, number > 0, 'true' and 'yes' values are true
2664 # rest of values are treated as false (never as error)
2665 sub config_to_bool {
2666         my $val = shift;
2667
2668         return 1 if !defined $val;             # section.key
2669
2670         # strip leading and trailing whitespace
2671         $val =~ s/^\s+//;
2672         $val =~ s/\s+$//;
2673
2674         return (($val =~ /^\d+$/ && $val) ||   # section.key = 1
2675                 ($val =~ /^(?:true|yes)$/i));  # section.key = true
2676 }
2677
2678 # convert config value to simple decimal number
2679 # an optional value suffix of 'k', 'm', or 'g' will cause the value
2680 # to be multiplied by 1024, 1048576, or 1073741824
2681 sub config_to_int {
2682         my $val = shift;
2683
2684         # strip leading and trailing whitespace
2685         $val =~ s/^\s+//;
2686         $val =~ s/\s+$//;
2687
2688         if (my ($num, $unit) = ($val =~ /^([0-9]*)([kmg])$/i)) {
2689                 $unit = lc($unit);
2690                 # unknown unit is treated as 1
2691                 return $num * ($unit eq 'g' ? 1073741824 :
2692                                $unit eq 'm' ?    1048576 :
2693                                $unit eq 'k' ?       1024 : 1);
2694         }
2695         return $val;
2696 }
2697
2698 # convert config value to array reference, if needed
2699 sub config_to_multi {
2700         my $val = shift;
2701
2702         return ref($val) ? $val : (defined($val) ? [ $val ] : []);
2703 }
2704
2705 sub git_get_project_config {
2706         my ($key, $type) = @_;
2707
2708         return unless defined $git_dir;
2709
2710         # key sanity check
2711         return unless ($key);
2712         # only subsection, if exists, is case sensitive,
2713         # and not lowercased by 'git config -z -l'
2714         if (my ($hi, $mi, $lo) = ($key =~ /^([^.]*)\.(.*)\.([^.]*)$/)) {
2715                 $lo =~ s/_//g;
2716                 $key = join(".", lc($hi), $mi, lc($lo));
2717                 return if ($lo =~ /\W/ || $hi =~ /\W/);
2718         } else {
2719                 $key = lc($key);
2720                 $key =~ s/_//g;
2721                 return if ($key =~ /\W/);
2722         }
2723         $key =~ s/^gitweb\.//;
2724
2725         # type sanity check
2726         if (defined $type) {
2727                 $type =~ s/^--//;
2728                 $type = undef
2729                         unless ($type eq 'bool' || $type eq 'int');
2730         }
2731
2732         # get config
2733         if (!defined $config_file ||
2734             $config_file ne "$git_dir/config") {
2735                 %config = git_parse_project_config('gitweb');
2736                 $config_file = "$git_dir/config";
2737         }
2738
2739         # check if config variable (key) exists
2740         return unless exists $config{"gitweb.$key"};
2741
2742         # ensure given type
2743         if (!defined $type) {
2744                 return $config{"gitweb.$key"};
2745         } elsif ($type eq 'bool') {
2746                 # backward compatibility: 'git config --bool' returns true/false
2747                 return config_to_bool($config{"gitweb.$key"}) ? 'true' : 'false';
2748         } elsif ($type eq 'int') {
2749                 return config_to_int($config{"gitweb.$key"});
2750         }
2751         return $config{"gitweb.$key"};
2752 }
2753
2754 # get hash of given path at given ref
2755 sub git_get_hash_by_path {
2756         my $base = shift;
2757         my $path = shift || return undef;
2758         my $type = shift;
2759
2760         $path =~ s,/+$,,;
2761
2762         open my $fd, "-|", git_cmd(), "ls-tree", $base, "--", $path
2763                 or die_error(500, "Open git-ls-tree failed");
2764         my $line = <$fd>;
2765         close $fd or return undef;
2766
2767         if (!defined $line) {
2768                 # there is no tree or hash given by $path at $base
2769                 return undef;
2770         }
2771
2772         #'100644 blob 0fa3f3a66fb6a137f6ec2c19351ed4d807070ffa  panic.c'
2773         $line =~ m/^([0-9]+) (.+) ([0-9a-fA-F]{40})\t/;
2774         if (defined $type && $type ne $2) {
2775                 # type doesn't match
2776                 return undef;
2777         }
2778         return $3;
2779 }
2780
2781 # get path of entry with given hash at given tree-ish (ref)
2782 # used to get 'from' filename for combined diff (merge commit) for renames
2783 sub git_get_path_by_hash {
2784         my $base = shift || return;
2785         my $hash = shift || return;
2786
2787         local $/ = "\0";
2788
2789         open my $fd, "-|", git_cmd(), "ls-tree", '-r', '-t', '-z', $base
2790                 or return undef;
2791         while (my $line = <$fd>) {
2792                 chomp $line;
2793
2794                 #'040000 tree 595596a6a9117ddba9fe379b6b012b558bac8423  gitweb'
2795                 #'100644 blob e02e90f0429be0d2a69b76571101f20b8f75530f  gitweb/README'
2796                 if ($line =~ m/(?:[0-9]+) (?:.+) $hash\t(.+)$/) {
2797                         close $fd;
2798                         return $1;
2799                 }
2800         }
2801         close $fd;
2802         return undef;
2803 }
2804
2805 ## ......................................................................
2806 ## git utility functions, directly accessing git repository
2807
2808 # get the value of config variable either from file named as the variable
2809 # itself in the repository ($GIT_DIR/$name file), or from gitweb.$name
2810 # configuration variable in the repository config file.
2811 sub git_get_file_or_project_config {
2812         my ($path, $name) = @_;
2813
2814         $git_dir = "$projectroot/$path";
2815         open my $fd, '<', "$git_dir/$name"
2816                 or return git_get_project_config($name);
2817         my $conf = <$fd>;
2818         close $fd;
2819         if (defined $conf) {
2820                 chomp $conf;
2821         }
2822         return $conf;
2823 }
2824
2825 sub git_get_project_description {
2826         my $path = shift;
2827         return git_get_file_or_project_config($path, 'description');
2828 }
2829
2830 sub git_get_project_category {
2831         my $path = shift;
2832         return git_get_file_or_project_config($path, 'category');
2833 }
2834
2835
2836 # supported formats:
2837 # * $GIT_DIR/ctags/<tagname> file (in 'ctags' subdirectory)
2838 #   - if its contents is a number, use it as tag weight,
2839 #   - otherwise add a tag with weight 1
2840 # * $GIT_DIR/ctags file, each line is a tag (with weight 1)
2841 #   the same value multiple times increases tag weight
2842 # * `gitweb.ctag' multi-valued repo config variable
2843 sub git_get_project_ctags {
2844         my $project = shift;
2845         my $ctags = {};
2846
2847         $git_dir = "$projectroot/$project";
2848         if (opendir my $dh, "$git_dir/ctags") {
2849                 my @files = grep { -f $_ } map { "$git_dir/ctags/$_" } readdir($dh);
2850                 foreach my $tagfile (@files) {
2851                         open my $ct, '<', $tagfile
2852                                 or next;
2853                         my $val = <$ct>;
2854                         chomp $val if $val;
2855                         close $ct;
2856
2857                         (my $ctag = $tagfile) =~ s#.*/##;
2858                         if ($val =~ /^\d+$/) {
2859                                 $ctags->{$ctag} = $val;
2860                         } else {
2861                                 $ctags->{$ctag} = 1;
2862                         }
2863                 }
2864                 closedir $dh;
2865
2866         } elsif (open my $fh, '<', "$git_dir/ctags") {
2867                 while (my $line = <$fh>) {
2868                         chomp $line;
2869                         $ctags->{$line}++ if $line;
2870                 }
2871                 close $fh;
2872
2873         } else {
2874                 my $taglist = config_to_multi(git_get_project_config('ctag'));
2875                 foreach my $tag (@$taglist) {
2876                         $ctags->{$tag}++;
2877                 }
2878         }
2879
2880         return $ctags;
2881 }
2882
2883 # return hash, where keys are content tags ('ctags'),
2884 # and values are sum of weights of given tag in every project
2885 sub git_gather_all_ctags {
2886         my $projects = shift;
2887         my $ctags = {};
2888
2889         foreach my $p (@$projects) {
2890                 foreach my $ct (keys %{$p->{'ctags'}}) {
2891                         $ctags->{$ct} += $p->{'ctags'}->{$ct};
2892                 }
2893         }
2894
2895         return $ctags;
2896 }
2897
2898 sub git_populate_project_tagcloud {
2899         my $ctags = shift;
2900
2901         # First, merge different-cased tags; tags vote on casing
2902         my %ctags_lc;
2903         foreach (keys %$ctags) {
2904                 $ctags_lc{lc $_}->{count} += $ctags->{$_};
2905                 if (not $ctags_lc{lc $_}->{topcount}
2906                     or $ctags_lc{lc $_}->{topcount} < $ctags->{$_}) {
2907                         $ctags_lc{lc $_}->{topcount} = $ctags->{$_};
2908                         $ctags_lc{lc $_}->{topname} = $_;
2909                 }
2910         }
2911
2912         my $cloud;
2913         my $matched = $input_params{'ctag'};
2914         if (eval { require HTML::TagCloud; 1; }) {
2915                 $cloud = HTML::TagCloud->new;
2916                 foreach my $ctag (sort keys %ctags_lc) {
2917                         # Pad the title with spaces so that the cloud looks
2918                         # less crammed.
2919                         my $title = esc_html($ctags_lc{$ctag}->{topname});
2920                         $title =~ s/ /&nbsp;/g;
2921                         $title =~ s/^/&nbsp;/g;
2922                         $title =~ s/$/&nbsp;/g;
2923                         if (defined $matched && $matched eq $ctag) {
2924                                 $title = qq(<span class="match">$title</span>);
2925                         }
2926                         $cloud->add($title, href(project=>undef, ctag=>$ctag),
2927                                     $ctags_lc{$ctag}->{count});
2928                 }
2929         } else {
2930                 $cloud = {};
2931                 foreach my $ctag (keys %ctags_lc) {
2932                         my $title = esc_html($ctags_lc{$ctag}->{topname}, -nbsp=>1);
2933                         if (defined $matched && $matched eq $ctag) {
2934                                 $title = qq(<span class="match">$title</span>);
2935                         }
2936                         $cloud->{$ctag}{count} = $ctags_lc{$ctag}->{count};
2937                         $cloud->{$ctag}{ctag} =
2938                                 $cgi->a({-href=>href(project=>undef, ctag=>$ctag)}, $title);
2939                 }
2940         }
2941         return $cloud;
2942 }
2943
2944 sub git_show_project_tagcloud {
2945         my ($cloud, $count) = @_;
2946         if (ref $cloud eq 'HTML::TagCloud') {
2947                 return $cloud->html_and_css($count);
2948         } else {
2949                 my @tags = sort { $cloud->{$a}->{'count'} <=> $cloud->{$b}->{'count'} } keys %$cloud;
2950                 return
2951                         '<div id="htmltagcloud"'.($project ? '' : ' align="center"').'>' .
2952                         join (', ', map {
2953                                 $cloud->{$_}->{'ctag'}
2954                         } splice(@tags, 0, $count)) .
2955                         '</div>';
2956         }
2957 }
2958
2959 sub git_get_project_url_list {
2960         my $path = shift;
2961
2962         $git_dir = "$projectroot/$path";
2963         open my $fd, '<', "$git_dir/cloneurl"
2964                 or return wantarray ?
2965                 @{ config_to_multi(git_get_project_config('url')) } :
2966                    config_to_multi(git_get_project_config('url'));
2967         my @git_project_url_list = map { chomp; $_ } <$fd>;
2968         close $fd;
2969
2970         return wantarray ? @git_project_url_list : \@git_project_url_list;
2971 }
2972
2973 sub git_get_projects_list {
2974         my $filter = shift || '';
2975         my $paranoid = shift;
2976         my @list;
2977
2978         if (-d $projects_list) {
2979                 # search in directory
2980                 my $dir = $projects_list;
2981                 # remove the trailing "/"
2982                 $dir =~ s!/+$!!;
2983                 my $pfxlen = length("$dir");
2984                 my $pfxdepth = ($dir =~ tr!/!!);
2985                 # when filtering, search only given subdirectory
2986                 if ($filter && !$paranoid) {
2987                         $dir .= "/$filter";
2988                         $dir =~ s!/+$!!;
2989                 }
2990
2991                 File::Find::find({
2992                         follow_fast => 1, # follow symbolic links
2993                         follow_skip => 2, # ignore duplicates
2994                         dangling_symlinks => 0, # ignore dangling symlinks, silently
2995                         wanted => sub {
2996                                 # global variables
2997                                 our $project_maxdepth;
2998                                 our $projectroot;
2999                                 # skip project-list toplevel, if we get it.
3000                                 return if (m!^[/.]$!);
3001                                 # only directories can be git repositories
3002                                 return unless (-d $_);
3003                                 # don't traverse too deep (Find is super slow on os x)
3004                                 # $project_maxdepth excludes depth of $projectroot
3005                                 if (($File::Find::name =~ tr!/!!) - $pfxdepth > $project_maxdepth) {
3006                                         $File::Find::prune = 1;
3007                                         return;
3008                                 }
3009
3010                                 my $path = substr($File::Find::name, $pfxlen + 1);
3011                                 # paranoidly only filter here
3012                                 if ($paranoid && $filter && $path !~ m!^\Q$filter\E/!) {
3013                                         next;
3014                                 }
3015                                 # we check related file in $projectroot
3016                                 if (check_export_ok("$projectroot/$path")) {
3017                                         push @list, { path => $path };
3018                                         $File::Find::prune = 1;
3019                                 }
3020                         },
3021                 }, "$dir");
3022
3023         } elsif (-f $projects_list) {
3024                 # read from file(url-encoded):
3025                 # 'git%2Fgit.git Linus+Torvalds'
3026                 # 'libs%2Fklibc%2Fklibc.git H.+Peter+Anvin'
3027                 # 'linux%2Fhotplug%2Fudev.git Greg+Kroah-Hartman'
3028                 open my $fd, '<', $projects_list or return;
3029         PROJECT:
3030                 while (my $line = <$fd>) {
3031                         chomp $line;
3032                         my ($path, $owner) = split ' ', $line;
3033                         $path = unescape($path);
3034                         $owner = unescape($owner);
3035                         if (!defined $path) {
3036                                 next;
3037                         }
3038                         # if $filter is rpovided, check if $path begins with $filter
3039                         if ($filter && $path !~ m!^\Q$filter\E/!) {
3040                                 next;
3041                         }
3042                         if (check_export_ok("$projectroot/$path")) {
3043                                 my $pr = {
3044                                         path => $path
3045                                 };
3046                                 if ($owner) {
3047                                         $pr->{'owner'} = to_utf8($owner);
3048                                 }
3049                                 push @list, $pr;
3050                         }
3051                 }
3052                 close $fd;
3053         }
3054         return @list;
3055 }
3056
3057 # written with help of Tree::Trie module (Perl Artistic License, GPL compatibile)
3058 # as side effects it sets 'forks' field to list of forks for forked projects
3059 sub filter_forks_from_projects_list {
3060         my $projects = shift;
3061
3062         my %trie; # prefix tree of directories (path components)
3063         # generate trie out of those directories that might contain forks
3064         foreach my $pr (@$projects) {
3065                 my $path = $pr->{'path'};
3066                 $path =~ s/\.git$//;      # forks of 'repo.git' are in 'repo/' directory
3067                 next if ($path =~ m!/$!); # skip non-bare repositories, e.g. 'repo/.git'
3068                 next unless ($path);      # skip '.git' repository: tests, git-instaweb
3069                 next unless (-d "$projectroot/$path"); # containing directory exists
3070                 $pr->{'forks'} = [];      # there can be 0 or more forks of project
3071
3072                 # add to trie
3073                 my @dirs = split('/', $path);
3074                 # walk the trie, until either runs out of components or out of trie
3075                 my $ref = \%trie;
3076                 while (scalar @dirs &&
3077                        exists($ref->{$dirs[0]})) {
3078                         $ref = $ref->{shift @dirs};
3079                 }
3080                 # create rest of trie structure from rest of components
3081                 foreach my $dir (@dirs) {
3082                         $ref = $ref->{$dir} = {};
3083                 }
3084                 # create end marker, store $pr as a data
3085                 $ref->{''} = $pr if (!exists $ref->{''});
3086         }
3087
3088         # filter out forks, by finding shortest prefix match for paths
3089         my @filtered;
3090  PROJECT:
3091         foreach my $pr (@$projects) {
3092                 # trie lookup
3093                 my $ref = \%trie;
3094         DIR:
3095                 foreach my $dir (split('/', $pr->{'path'})) {
3096                         if (exists $ref->{''}) {
3097                                 # found [shortest] prefix, is a fork - skip it
3098                                 push @{$ref->{''}{'forks'}}, $pr;
3099                                 next PROJECT;
3100                         }
3101                         if (!exists $ref->{$dir}) {
3102                                 # not in trie, cannot have prefix, not a fork
3103                                 push @filtered, $pr;
3104                                 next PROJECT;
3105                         }
3106                         # If the dir is there, we just walk one step down the trie.
3107                         $ref = $ref->{$dir};
3108                 }
3109                 # we ran out of trie
3110                 # (shouldn't happen: it's either no match, or end marker)
3111                 push @filtered, $pr;
3112         }
3113
3114         return @filtered;
3115 }
3116
3117 # note: fill_project_list_info must be run first,
3118 # for 'descr_long' and 'ctags' to be filled
3119 sub search_projects_list {
3120         my ($projlist, %opts) = @_;
3121         my $tagfilter  = $opts{'tagfilter'};
3122         my $search_re = $opts{'search_regexp'};
3123
3124         return @$projlist
3125                 unless ($tagfilter || $search_re);
3126
3127         # searching projects require filling to be run before it;
3128         fill_project_list_info($projlist,
3129                                $tagfilter  ? 'ctags' : (),
3130                                $search_re ? ('path', 'descr') : ());
3131         my @projects;
3132  PROJECT:
3133         foreach my $pr (@$projlist) {
3134
3135                 if ($tagfilter) {
3136                         next unless ref($pr->{'ctags'}) eq 'HASH';
3137                         next unless
3138                                 grep { lc($_) eq lc($tagfilter) } keys %{$pr->{'ctags'}};
3139                 }
3140
3141                 if ($search_re) {
3142                         next unless
3143                                 $pr->{'path'} =~ /$search_re/ ||
3144                                 $pr->{'descr_long'} =~ /$search_re/;
3145                 }
3146
3147                 push @projects, $pr;
3148         }
3149
3150         return @projects;
3151 }
3152
3153 our $gitweb_project_owner = undef;
3154 sub git_get_project_list_from_file {
3155
3156         return if (defined $gitweb_project_owner);
3157
3158         $gitweb_project_owner = {};
3159         # read from file (url-encoded):
3160         # 'git%2Fgit.git Linus+Torvalds'
3161         # 'libs%2Fklibc%2Fklibc.git H.+Peter+Anvin'
3162         # 'linux%2Fhotplug%2Fudev.git Greg+Kroah-Hartman'
3163         if (-f $projects_list) {
3164                 open(my $fd, '<', $projects_list);
3165                 while (my $line = <$fd>) {
3166                         chomp $line;
3167                         my ($pr, $ow) = split ' ', $line;
3168                         $pr = unescape($pr);
3169                         $ow = unescape($ow);
3170                         $gitweb_project_owner->{$pr} = to_utf8($ow);
3171                 }
3172                 close $fd;
3173         }
3174 }
3175
3176 sub git_get_project_owner {
3177         my $project = shift;
3178         my $owner;
3179
3180         return undef unless $project;
3181         $git_dir = "$projectroot/$project";
3182
3183         if (!defined $gitweb_project_owner) {
3184                 git_get_project_list_from_file();
3185         }
3186
3187         if (exists $gitweb_project_owner->{$project}) {
3188                 $owner = $gitweb_project_owner->{$project};
3189         }
3190         if (!defined $owner){
3191                 $owner = git_get_project_config('owner');
3192         }
3193         if (!defined $owner) {
3194                 $owner = get_file_owner("$git_dir");
3195         }
3196
3197         return $owner;
3198 }
3199
3200 sub git_get_last_activity {
3201         my ($path) = @_;
3202         my $fd;
3203
3204         $git_dir = "$projectroot/$path";
3205         open($fd, "-|", git_cmd(), 'for-each-ref',
3206              '--format=%(committer)',
3207              '--sort=-committerdate',
3208              '--count=1',
3209              'refs/heads') or return;
3210         my $most_recent = <$fd>;
3211         close $fd or return;
3212         if (defined $most_recent &&
3213             $most_recent =~ / (\d+) [-+][01]\d\d\d$/) {
3214                 my $timestamp = $1;
3215                 my $age = time - $timestamp;
3216                 return ($age, age_string($age));
3217         }
3218         return (undef, undef);
3219 }
3220
3221 # Implementation note: when a single remote is wanted, we cannot use 'git
3222 # remote show -n' because that command always work (assuming it's a remote URL
3223 # if it's not defined), and we cannot use 'git remote show' because that would
3224 # try to make a network roundtrip. So the only way to find if that particular
3225 # remote is defined is to walk the list provided by 'git remote -v' and stop if
3226 # and when we find what we want.
3227 sub git_get_remotes_list {
3228         my $wanted = shift;
3229         my %remotes = ();
3230
3231         open my $fd, '-|' , git_cmd(), 'remote', '-v';
3232         return unless $fd;
3233         while (my $remote = <$fd>) {
3234                 chomp $remote;
3235                 $remote =~ s!\t(.*?)\s+\((\w+)\)$!!;
3236                 next if $wanted and not $remote eq $wanted;
3237                 my ($url, $key) = ($1, $2);
3238
3239                 $remotes{$remote} ||= { 'heads' => () };
3240                 $remotes{$remote}{$key} = $url;
3241         }
3242         close $fd or return;
3243         return wantarray ? %remotes : \%remotes;
3244 }
3245
3246 # Takes a hash of remotes as first parameter and fills it by adding the
3247 # available remote heads for each of the indicated remotes.
3248 sub fill_remote_heads {
3249         my $remotes = shift;
3250         my @heads = map { "remotes/$_" } keys %$remotes;
3251         my @remoteheads = git_get_heads_list(undef, @heads);
3252         foreach my $remote (keys %$remotes) {
3253                 $remotes->{$remote}{'heads'} = [ grep {
3254                         $_->{'name'} =~ s!^$remote/!!
3255                         } @remoteheads ];
3256         }
3257 }
3258
3259 sub git_get_references {
3260         my $type = shift || "";
3261         my %refs;
3262         # 5dc01c595e6c6ec9ccda4f6f69c131c0dd945f8c refs/tags/v2.6.11
3263         # c39ae07f393806ccf406ef966e9a15afc43cc36a refs/tags/v2.6.11^{}
3264         open my $fd, "-|", git_cmd(), "show-ref", "--dereference",
3265                 ($type ? ("--", "refs/$type") : ()) # use -- <pattern> if $type
3266                 or return;
3267
3268         while (my $line = <$fd>) {
3269                 chomp $line;
3270                 if ($line =~ m!^([0-9a-fA-F]{40})\srefs/($type.*)$!) {
3271                         if (defined $refs{$1}) {
3272                                 push @{$refs{$1}}, $2;
3273                         } else {
3274                                 $refs{$1} = [ $2 ];
3275                         }
3276                 }
3277         }
3278         close $fd or return;
3279         return \%refs;
3280 }
3281
3282 sub git_get_rev_name_tags {
3283         my $hash = shift || return undef;
3284
3285         open my $fd, "-|", git_cmd(), "name-rev", "--tags", $hash
3286                 or return;
3287         my $name_rev = <$fd>;
3288         close $fd;
3289
3290         if ($name_rev =~ m|^$hash tags/(.*)$|) {
3291                 return $1;
3292         } else {
3293                 # catches also '$hash undefined' output
3294                 return undef;
3295         }
3296 }
3297
3298 ## ----------------------------------------------------------------------
3299 ## parse to hash functions
3300
3301 sub parse_date {
3302         my $epoch = shift;
3303         my $tz = shift || "-0000";
3304
3305         my %date;
3306         my @months = ("Jan", "Feb", "Mar", "Apr", "May", "Jun", "Jul", "Aug", "Sep", "Oct", "Nov", "Dec");
3307         my @days = ("Sun", "Mon", "Tue", "Wed", "Thu", "Fri", "Sat");
3308         my ($sec, $min, $hour, $mday, $mon, $year, $wday, $yday) = gmtime($epoch);
3309         $date{'hour'} = $hour;
3310         $date{'minute'} = $min;
3311         $date{'mday'} = $mday;
3312         $date{'day'} = $days[$wday];
3313         $date{'month'} = $months[$mon];
3314         $date{'rfc2822'}   = sprintf "%s, %d %s %4d %02d:%02d:%02d +0000",
3315                              $days[$wday], $mday, $months[$mon], 1900+$year, $hour ,$min, $sec;
3316         $date{'mday-time'} = sprintf "%d %s %02d:%02d",
3317                              $mday, $months[$mon], $hour ,$min;
3318         $date{'iso-8601'}  = sprintf "%04d-%02d-%02dT%02d:%02d:%02dZ",
3319                              1900+$year, 1+$mon, $mday, $hour ,$min, $sec;
3320
3321         my ($tz_sign, $tz_hour, $tz_min) =
3322                 ($tz =~ m/^([-+])(\d\d)(\d\d)$/);
3323         $tz_sign = ($tz_sign eq '-' ? -1 : +1);
3324         my $local = $epoch + $tz_sign*((($tz_hour*60) + $tz_min)*60);
3325         ($sec, $min, $hour, $mday, $mon, $year, $wday, $yday) = gmtime($local);
3326         $date{'hour_local'} = $hour;
3327         $date{'minute_local'} = $min;
3328         $date{'tz_local'} = $tz;
3329         $date{'iso-tz'} = sprintf("%04d-%02d-%02d %02d:%02d:%02d %s",
3330                                   1900+$year, $mon+1, $mday,
3331                                   $hour, $min, $sec, $tz);
3332         return %date;
3333 }
3334
3335 sub parse_tag {
3336         my $tag_id = shift;
3337         my %tag;
3338         my @comment;
3339
3340         open my $fd, "-|", git_cmd(), "cat-file", "tag", $tag_id or return;
3341         $tag{'id'} = $tag_id;
3342         while (my $line = <$fd>) {
3343                 chomp $line;
3344                 if ($line =~ m/^object ([0-9a-fA-F]{40})$/) {
3345                         $tag{'object'} = $1;
3346                 } elsif ($line =~ m/^type (.+)$/) {
3347                         $tag{'type'} = $1;
3348                 } elsif ($line =~ m/^tag (.+)$/) {
3349                         $tag{'name'} = $1;
3350                 } elsif ($line =~ m/^tagger (.*) ([0-9]+) (.*)$/) {
3351                         $tag{'author'} = $1;
3352                         $tag{'author_epoch'} = $2;
3353                         $tag{'author_tz'} = $3;
3354                         if ($tag{'author'} =~ m/^([^<]+) <([^>]*)>/) {
3355                                 $tag{'author_name'}  = $1;
3356                                 $tag{'author_email'} = $2;
3357                         } else {
3358                                 $tag{'author_name'} = $tag{'author'};
3359                         }
3360                 } elsif ($line =~ m/--BEGIN/) {
3361                         push @comment, $line;
3362                         last;
3363                 } elsif ($line eq "") {
3364                         last;
3365                 }
3366         }
3367         push @comment, <$fd>;
3368         $tag{'comment'} = \@comment;
3369         close $fd or return;
3370         if (!defined $tag{'name'}) {
3371                 return
3372         };
3373         return %tag
3374 }
3375
3376 sub parse_commit_text {
3377         my ($commit_text, $withparents) = @_;
3378         my @commit_lines = split '\n', $commit_text;
3379         my %co;
3380
3381         pop @commit_lines; # Remove '\0'
3382
3383         if (! @commit_lines) {
3384                 return;
3385         }
3386
3387         my $header = shift @commit_lines;
3388         if ($header !~ m/^[0-9a-fA-F]{40}/) {
3389                 return;
3390         }
3391         ($co{'id'}, my @parents) = split ' ', $header;
3392         while (my $line = shift @commit_lines) {
3393                 last if $line eq "\n";
3394                 if ($line =~ m/^tree ([0-9a-fA-F]{40})$/) {
3395                         $co{'tree'} = $1;
3396                 } elsif ((!defined $withparents) && ($line =~ m/^parent ([0-9a-fA-F]{40})$/)) {
3397                         push @parents, $1;
3398                 } elsif ($line =~ m/^author (.*) ([0-9]+) (.*)$/) {
3399                         $co{'author'} = to_utf8($1);
3400                         $co{'author_epoch'} = $2;
3401                         $co{'author_tz'} = $3;
3402                         if ($co{'author'} =~ m/^([^<]+) <([^>]*)>/) {
3403                                 $co{'author_name'}  = $1;
3404                                 $co{'author_email'} = $2;
3405                         } else {
3406                                 $co{'author_name'} = $co{'author'};
3407                         }
3408                 } elsif ($line =~ m/^committer (.*) ([0-9]+) (.*)$/) {
3409                         $co{'committer'} = to_utf8($1);
3410                         $co{'committer_epoch'} = $2;
3411                         $co{'committer_tz'} = $3;
3412                         if ($co{'committer'} =~ m/^([^<]+) <([^>]*)>/) {
3413                                 $co{'committer_name'}  = $1;
3414                                 $co{'committer_email'} = $2;
3415                         } else {
3416                                 $co{'committer_name'} = $co{'committer'};
3417                         }
3418                 }
3419         }
3420         if (!defined $co{'tree'}) {
3421                 return;
3422         };
3423         $co{'parents'} = \@parents;
3424         $co{'parent'} = $parents[0];
3425
3426         foreach my $title (@commit_lines) {
3427                 $title =~ s/^    //;
3428                 if ($title ne "") {
3429                         $co{'title'} = chop_str($title, 80, 5);
3430                         # remove leading stuff of merges to make the interesting part visible
3431                         if (length($title) > 50) {
3432                                 $title =~ s/^Automatic //;
3433                                 $title =~ s/^merge (of|with) /Merge ... /i;
3434                                 if (length($title) > 50) {
3435                                         $title =~ s/(http|rsync):\/\///;
3436                                 }
3437                                 if (length($title) > 50) {
3438                                         $title =~ s/(master|www|rsync)\.//;
3439                                 }
3440                                 if (length($title) > 50) {
3441                                         $title =~ s/kernel.org:?//;
3442                                 }
3443                                 if (length($title) > 50) {
3444                                         $title =~ s/\/pub\/scm//;
3445                                 }
3446                         }
3447                         $co{'title_short'} = chop_str($title, 50, 5);
3448                         last;
3449                 }
3450         }
3451         if (! defined $co{'title'} || $co{'title'} eq "") {
3452                 $co{'title'} = $co{'title_short'} = '(no commit message)';
3453         }
3454         # remove added spaces
3455         foreach my $line (@commit_lines) {
3456                 $line =~ s/^    //;
3457         }
3458         $co{'comment'} = \@commit_lines;
3459
3460         my $age = time - $co{'committer_epoch'};
3461         $co{'age'} = $age;
3462         $co{'age_string'} = age_string($age);
3463         my ($sec, $min, $hour, $mday, $mon, $year, $wday, $yday) = gmtime($co{'committer_epoch'});
3464         if ($age > 60*60*24*7*2) {
3465                 $co{'age_string_date'} = sprintf "%4i-%02u-%02i", 1900 + $year, $mon+1, $mday;
3466                 $co{'age_string_age'} = $co{'age_string'};
3467         } else {
3468                 $co{'age_string_date'} = $co{'age_string'};
3469                 $co{'age_string_age'} = sprintf "%4i-%02u-%02i", 1900 + $year, $mon+1, $mday;
3470         }
3471         return %co;
3472 }
3473
3474 sub parse_commit {
3475         my ($commit_id) = @_;
3476         my %co;
3477
3478         local $/ = "\0";
3479
3480         open my $fd, "-|", git_cmd(), "rev-list",
3481                 "--parents",
3482                 "--header",
3483                 "--max-count=1",
3484                 $commit_id,
3485                 "--",
3486                 or die_error(500, "Open git-rev-list failed");
3487         %co = parse_commit_text(<$fd>, 1);
3488         close $fd;
3489
3490         return %co;
3491 }
3492
3493 sub parse_commits {
3494         my ($commit_id, $maxcount, $skip, $filename, @args) = @_;
3495         my @cos;
3496
3497         $maxcount ||= 1;
3498         $skip ||= 0;
3499
3500         local $/ = "\0";
3501
3502         open my $fd, "-|", git_cmd(), "rev-list",
3503                 "--header",
3504                 @args,
3505                 ("--max-count=" . $maxcount),
3506                 ("--skip=" . $skip),
3507                 @extra_options,
3508                 $commit_id,
3509                 "--",
3510                 ($filename ? ($filename) : ())
3511                 or die_error(500, "Open git-rev-list failed");
3512         while (my $line = <$fd>) {
3513                 my %co = parse_commit_text($line);
3514                 push @cos, \%co;
3515         }
3516         close $fd;
3517
3518         return wantarray ? @cos : \@cos;
3519 }
3520
3521 # parse line of git-diff-tree "raw" output
3522 sub parse_difftree_raw_line {
3523         my $line = shift;
3524         my %res;
3525
3526         # ':100644 100644 03b218260e99b78c6df0ed378e59ed9205ccc96d 3b93d5e7cc7f7dd4ebed13a5cc1a4ad976fc94d8 M   ls-files.c'
3527         # ':100644 100644 7f9281985086971d3877aca27704f2aaf9c448ce bc190ebc71bbd923f2b728e505408f5e54bd073a M   rev-tree.c'
3528         if ($line =~ m/^:([0-7]{6}) ([0-7]{6}) ([0-9a-fA-F]{40}) ([0-9a-fA-F]{40}) (.)([0-9]{0,3})\t(.*)$/) {
3529                 $res{'from_mode'} = $1;
3530                 $res{'to_mode'} = $2;
3531                 $res{'from_id'} = $3;
3532                 $res{'to_id'} = $4;
3533                 $res{'status'} = $5;
3534                 $res{'similarity'} = $6;
3535                 if ($res{'status'} eq 'R' || $res{'status'} eq 'C') { # renamed or copied
3536                         ($res{'from_file'}, $res{'to_file'}) = map { unquote($_) } split("\t", $7);
3537                 } else {
3538                         $res{'from_file'} = $res{'to_file'} = $res{'file'} = unquote($7);
3539                 }
3540         }
3541         # '::100755 100755 100755 60e79ca1b01bc8b057abe17ddab484699a7f5fdb 94067cc5f73388f33722d52ae02f44692bc07490 94067cc5f73388f33722d52ae02f44692bc07490 MR git-gui/git-gui.sh'
3542         # combined diff (for merge commit)
3543         elsif ($line =~ s/^(::+)((?:[0-7]{6} )+)((?:[0-9a-fA-F]{40} )+)([a-zA-Z]+)\t(.*)$//) {
3544                 $res{'nparents'}  = length($1);
3545                 $res{'from_mode'} = [ split(' ', $2) ];
3546                 $res{'to_mode'} = pop @{$res{'from_mode'}};
3547                 $res{'from_id'} = [ split(' ', $3) ];
3548                 $res{'to_id'} = pop @{$res{'from_id'}};
3549                 $res{'status'} = [ split('', $4) ];
3550                 $res{'to_file'} = unquote($5);
3551         }
3552         # 'c512b523472485aef4fff9e57b229d9d243c967f'
3553         elsif ($line =~ m/^([0-9a-fA-F]{40})$/) {
3554                 $res{'commit'} = $1;
3555         }
3556
3557         return wantarray ? %res : \%res;
3558 }
3559
3560 # wrapper: return parsed line of git-diff-tree "raw" output
3561 # (the argument might be raw line, or parsed info)
3562 sub parsed_difftree_line {
3563         my $line_or_ref = shift;
3564
3565         if (ref($line_or_ref) eq "HASH") {
3566                 # pre-parsed (or generated by hand)
3567                 return $line_or_ref;
3568         } else {
3569                 return parse_difftree_raw_line($line_or_ref);
3570         }
3571 }
3572
3573 # parse line of git-ls-tree output
3574 sub parse_ls_tree_line {
3575         my $line = shift;
3576         my %opts = @_;
3577         my %res;
3578
3579         if ($opts{'-l'}) {
3580                 #'100644 blob 0fa3f3a66fb6a137f6ec2c19351ed4d807070ffa   16717  panic.c'
3581                 $line =~ m/^([0-9]+) (.+) ([0-9a-fA-F]{40}) +(-|[0-9]+)\t(.+)$/s;
3582
3583                 $res{'mode'} = $1;
3584                 $res{'type'} = $2;
3585                 $res{'hash'} = $3;
3586                 $res{'size'} = $4;
3587                 if ($opts{'-z'}) {
3588                         $res{'name'} = $5;
3589                 } else {
3590                         $res{'name'} = unquote($5);
3591                 }
3592         } else {
3593                 #'100644 blob 0fa3f3a66fb6a137f6ec2c19351ed4d807070ffa  panic.c'
3594                 $line =~ m/^([0-9]+) (.+) ([0-9a-fA-F]{40})\t(.+)$/s;
3595
3596                 $res{'mode'} = $1;
3597                 $res{'type'} = $2;
3598                 $res{'hash'} = $3;
3599                 if ($opts{'-z'}) {
3600                         $res{'name'} = $4;
3601                 } else {
3602                         $res{'name'} = unquote($4);
3603                 }
3604         }
3605
3606         return wantarray ? %res : \%res;
3607 }
3608
3609 # generates _two_ hashes, references to which are passed as 2 and 3 argument
3610 sub parse_from_to_diffinfo {
3611         my ($diffinfo, $from, $to, @parents) = @_;
3612
3613         if ($diffinfo->{'nparents'}) {
3614                 # combined diff
3615                 $from->{'file'} = [];
3616                 $from->{'href'} = [];
3617                 fill_from_file_info($diffinfo, @parents)
3618                         unless exists $diffinfo->{'from_file'};
3619                 for (my $i = 0; $i < $diffinfo->{'nparents'}; $i++) {
3620                         $from->{'file'}[$i] =
3621                                 defined $diffinfo->{'from_file'}[$i] ?
3622                                         $diffinfo->{'from_file'}[$i] :
3623                                         $diffinfo->{'to_file'};
3624                         if ($diffinfo->{'status'}[$i] ne "A") { # not new (added) file
3625                                 $from->{'href'}[$i] = href(action=>"blob",
3626                                                            hash_base=>$parents[$i],
3627                                                            hash=>$diffinfo->{'from_id'}[$i],
3628                                                            file_name=>$from->{'file'}[$i]);
3629                         } else {
3630                                 $from->{'href'}[$i] = undef;
3631                         }
3632                 }
3633         } else {
3634                 # ordinary (not combined) diff
3635                 $from->{'file'} = $diffinfo->{'from_file'};
3636                 if ($diffinfo->{'status'} ne "A") { # not new (added) file
3637                         $from->{'href'} = href(action=>"blob", hash_base=>$hash_parent,
3638                                                hash=>$diffinfo->{'from_id'},
3639                                                file_name=>$from->{'file'});
3640                 } else {
3641                         delete $from->{'href'};
3642                 }
3643         }
3644
3645         $to->{'file'} = $diffinfo->{'to_file'};
3646         if (!is_deleted($diffinfo)) { # file exists in result
3647                 $to->{'href'} = href(action=>"blob", hash_base=>$hash,
3648                                      hash=>$diffinfo->{'to_id'},
3649                                      file_name=>$to->{'file'});
3650         } else {
3651                 delete $to->{'href'};
3652         }
3653 }
3654
3655 ## ......................................................................
3656 ## parse to array of hashes functions
3657
3658 sub git_get_heads_list {
3659         my ($limit, @classes) = @_;
3660         @classes = ('heads') unless @classes;
3661         my @patterns = map { "refs/$_" } @classes;
3662         my @headslist;
3663
3664         open my $fd, '-|', git_cmd(), 'for-each-ref',
3665                 ($limit ? '--count='.($limit+1) : ()), '--sort=-committerdate',
3666                 '--format=%(objectname) %(refname) %(subject)%00%(committer)',
3667                 @patterns
3668                 or return;
3669         while (my $line = <$fd>) {
3670                 my %ref_item;
3671
3672                 chomp $line;
3673                 my ($refinfo, $committerinfo) = split(/\0/, $line);
3674                 my ($hash, $name, $title) = split(' ', $refinfo, 3);
3675                 my ($committer, $epoch, $tz) =
3676                         ($committerinfo =~ /^(.*) ([0-9]+) (.*)$/);
3677                 $ref_item{'fullname'}  = $name;
3678                 $name =~ s!^refs/(?:head|remote)s/!!;
3679
3680                 $ref_item{'name'}  = $name;
3681                 $ref_item{'id'}    = $hash;
3682                 $ref_item{'title'} = $title || '(no commit message)';
3683                 $ref_item{'epoch'} = $epoch;
3684                 if ($epoch) {
3685                         $ref_item{'age'} = age_string(time - $ref_item{'epoch'});
3686                 } else {
3687                         $ref_item{'age'} = "unknown";
3688                 }
3689
3690                 push @headslist, \%ref_item;
3691         }
3692         close $fd;
3693
3694         return wantarray ? @headslist : \@headslist;
3695 }
3696
3697 sub git_get_tags_list {
3698         my $limit = shift;
3699         my @tagslist;
3700
3701         open my $fd, '-|', git_cmd(), 'for-each-ref',
3702                 ($limit ? '--count='.($limit+1) : ()), '--sort=-creatordate',
3703                 '--format=%(objectname) %(objecttype) %(refname) '.
3704                 '%(*objectname) %(*objecttype) %(subject)%00%(creator)',
3705                 'refs/tags'
3706                 or return;
3707         while (my $line = <$fd>) {
3708                 my %ref_item;
3709
3710                 chomp $line;
3711                 my ($refinfo, $creatorinfo) = split(/\0/, $line);
3712                 my ($id, $type, $name, $refid, $reftype, $title) = split(' ', $refinfo, 6);
3713                 my ($creator, $epoch, $tz) =
3714                         ($creatorinfo =~ /^(.*) ([0-9]+) (.*)$/);
3715                 $ref_item{'fullname'} = $name;
3716                 $name =~ s!^refs/tags/!!;
3717
3718                 $ref_item{'type'} = $type;
3719                 $ref_item{'id'} = $id;
3720                 $ref_item{'name'} = $name;
3721                 if ($type eq "tag") {
3722                         $ref_item{'subject'} = $title;
3723                         $ref_item{'reftype'} = $reftype;
3724                         $ref_item{'refid'}   = $refid;
3725                 } else {
3726                         $ref_item{'reftype'} = $type;
3727                         $ref_item{'refid'}   = $id;
3728                 }
3729
3730                 if ($type eq "tag" || $type eq "commit") {
3731                         $ref_item{'epoch'} = $epoch;
3732                         if ($epoch) {
3733                                 $ref_item{'age'} = age_string(time - $ref_item{'epoch'});
3734                         } else {
3735                                 $ref_item{'age'} = "unknown";
3736                         }
3737                 }
3738
3739                 push @tagslist, \%ref_item;
3740         }
3741         close $fd;
3742
3743         return wantarray ? @tagslist : \@tagslist;
3744 }
3745
3746 ## ----------------------------------------------------------------------
3747 ## filesystem-related functions
3748
3749 sub get_file_owner {
3750         my $path = shift;
3751
3752         my ($dev, $ino, $mode, $nlink, $st_uid, $st_gid, $rdev, $size) = stat($path);
3753         my ($name, $passwd, $uid, $gid, $quota, $comment, $gcos, $dir, $shell) = getpwuid($st_uid);
3754         if (!defined $gcos) {
3755                 return undef;
3756         }
3757         my $owner = $gcos;
3758         $owner =~ s/[,;].*$//;
3759         return to_utf8($owner);
3760 }
3761
3762 # assume that file exists
3763 sub insert_file {
3764         my $filename = shift;
3765
3766         open my $fd, '<', $filename;
3767         print map { to_utf8($_) } <$fd>;
3768         close $fd;
3769 }
3770
3771 ## ......................................................................
3772 ## mimetype related functions
3773
3774 sub mimetype_guess_file {
3775         my $filename = shift;
3776         my $mimemap = shift;
3777         -r $mimemap or return undef;
3778
3779         my %mimemap;
3780         open(my $mh, '<', $mimemap) or return undef;
3781         while (<$mh>) {
3782                 next if m/^#/; # skip comments
3783                 my ($mimetype, @exts) = split(/\s+/);
3784                 foreach my $ext (@exts) {
3785                         $mimemap{$ext} = $mimetype;
3786                 }
3787         }
3788         close($mh);
3789
3790         $filename =~ /\.([^.]*)$/;
3791         return $mimemap{$1};
3792 }
3793
3794 sub mimetype_guess {
3795         my $filename = shift;
3796         my $mime;
3797         $filename =~ /\./ or return undef;
3798
3799         if ($mimetypes_file) {
3800                 my $file = $mimetypes_file;
3801                 if ($file !~ m!^/!) { # if it is relative path
3802                         # it is relative to project
3803                         $file = "$projectroot/$project/$file";
3804                 }
3805                 $mime = mimetype_guess_file($filename, $file);
3806         }
3807         $mime ||= mimetype_guess_file($filename, '/etc/mime.types');
3808         return $mime;
3809 }
3810
3811 sub blob_mimetype {
3812         my $fd = shift;
3813         my $filename = shift;
3814
3815         if ($filename) {
3816                 my $mime = mimetype_guess($filename);
3817                 $mime and return $mime;
3818         }
3819
3820         # just in case
3821         return $default_blob_plain_mimetype unless $fd;
3822
3823         if (-T $fd) {
3824                 return 'text/plain';
3825         } elsif (! $filename) {
3826                 return 'application/octet-stream';
3827         } elsif ($filename =~ m/\.png$/i) {
3828                 return 'image/png';
3829         } elsif ($filename =~ m/\.gif$/i) {
3830                 return 'image/gif';
3831         } elsif ($filename =~ m/\.jpe?g$/i) {
3832                 return 'image/jpeg';
3833         } else {
3834                 return 'application/octet-stream';
3835         }
3836 }
3837
3838 sub blob_contenttype {
3839         my ($fd, $file_name, $type) = @_;
3840
3841         $type ||= blob_mimetype($fd, $file_name);
3842         if ($type eq 'text/plain' && defined $default_text_plain_charset) {
3843                 $type .= "; charset=$default_text_plain_charset";
3844         }
3845
3846         return $type;
3847 }
3848
3849 # guess file syntax for syntax highlighting; return undef if no highlighting
3850 # the name of syntax can (in the future) depend on syntax highlighter used
3851 sub guess_file_syntax {
3852         my ($highlight, $mimetype, $file_name) = @_;
3853         return undef unless ($highlight && defined $file_name);
3854         my $basename = basename($file_name, '.in');
3855         return $highlight_basename{$basename}
3856                 if exists $highlight_basename{$basename};
3857
3858         $basename =~ /\.([^.]*)$/;
3859         my $ext = $1 or return undef;
3860         return $highlight_ext{$ext}
3861                 if exists $highlight_ext{$ext};
3862
3863         return undef;
3864 }
3865
3866 # run highlighter and return FD of its output,
3867 # or return original FD if no highlighting
3868 sub run_highlighter {
3869         my ($fd, $highlight, $syntax) = @_;
3870         return $fd unless ($highlight && defined $syntax);
3871
3872         close $fd;
3873         open $fd, quote_command(git_cmd(), "cat-file", "blob", $hash)." | ".
3874                   quote_command($highlight_bin).
3875                   " --replace-tabs=8 --fragment --syntax $syntax |"
3876                 or die_error(500, "Couldn't open file or run syntax highlighter");
3877         return $fd;
3878 }
3879
3880 ## ======================================================================
3881 ## functions printing HTML: header, footer, error page
3882
3883 sub get_page_title {
3884         my $title = to_utf8($site_name);
3885
3886         unless (defined $project) {
3887                 if (defined $project_filter) {
3888                         $title .= " - projects in '" . esc_path($project_filter) . "'";
3889                 }
3890                 return $title;
3891         }
3892         $title .= " - " . to_utf8($project);
3893
3894         return $title unless (defined $action);
3895         $title .= "/$action"; # $action is US-ASCII (7bit ASCII)
3896
3897         return $title unless (defined $file_name);
3898         $title .= " - " . esc_path($file_name);
3899         if ($action eq "tree" && $file_name !~ m|/$|) {
3900                 $title .= "/";
3901         }
3902
3903         return $title;
3904 }
3905
3906 sub get_content_type_html {
3907         # require explicit support from the UA if we are to send the page as
3908         # 'application/xhtml+xml', otherwise send it as plain old 'text/html'.
3909         # we have to do this because MSIE sometimes globs '*/*', pretending to
3910         # support xhtml+xml but choking when it gets what it asked for.
3911         if (defined $cgi->http('HTTP_ACCEPT') &&
3912             $cgi->http('HTTP_ACCEPT') =~ m/(,|;|\s|^)application\/xhtml\+xml(,|;|\s|$)/ &&
3913             $cgi->Accept('application/xhtml+xml') != 0) {
3914                 return 'application/xhtml+xml';
3915         } else {
3916                 return 'text/html';
3917         }
3918 }
3919
3920 sub print_feed_meta {
3921         if (defined $project) {
3922                 my %href_params = get_feed_info();
3923                 if (!exists $href_params{'-title'}) {
3924                         $href_params{'-title'} = 'log';
3925                 }
3926
3927                 foreach my $format (qw(RSS Atom)) {
3928                         my $type = lc($format);
3929                         my %link_attr = (
3930                                 '-rel' => 'alternate',
3931                                 '-title' => esc_attr("$project - $href_params{'-title'} - $format feed"),
3932                                 '-type' => "application/$type+xml"
3933                         );
3934
3935                         $href_params{'extra_options'} = undef;
3936                         $href_params{'action'} = $type;
3937                         $link_attr{'-href'} = href(%href_params);
3938                         print "<link ".
3939                               "rel=\"$link_attr{'-rel'}\" ".
3940                               "title=\"$link_attr{'-title'}\" ".
3941                               "href=\"$link_attr{'-href'}\" ".
3942                               "type=\"$link_attr{'-type'}\" ".
3943                               "/>\n";
3944
3945                         $href_params{'extra_options'} = '--no-merges';
3946                         $link_attr{'-href'} = href(%href_params);
3947                         $link_attr{'-title'} .= ' (no merges)';
3948                         print "<link ".
3949                               "rel=\"$link_attr{'-rel'}\" ".
3950                               "title=\"$link_attr{'-title'}\" ".
3951                               "href=\"$link_attr{'-href'}\" ".
3952                               "type=\"$link_attr{'-type'}\" ".
3953                               "/>\n";
3954                 }
3955
3956         } else {
3957                 printf('<link rel="alternate" title="%s projects list" '.
3958                        'href="%s" type="text/plain; charset=utf-8" />'."\n",
3959                        esc_attr($site_name), href(project=>undef, action=>"project_index"));
3960                 printf('<link rel="alternate" title="%s projects feeds" '.
3961                        'href="%s" type="text/x-opml" />'."\n",
3962                        esc_attr($site_name), href(project=>undef, action=>"opml"));
3963         }
3964 }
3965
3966 sub print_header_links {
3967         my $status = shift;
3968
3969         # print out each stylesheet that exist, providing backwards capability
3970         # for those people who defined $stylesheet in a config file
3971         if (defined $stylesheet) {
3972                 print '<link rel="stylesheet" type="text/css" href="'.esc_url($stylesheet).'"/>'."\n";
3973         } else {
3974                 foreach my $stylesheet (@stylesheets) {
3975                         next unless $stylesheet;
3976                         print '<link rel="stylesheet" type="text/css" href="'.esc_url($stylesheet).'"/>'."\n";
3977                 }
3978         }
3979         print_feed_meta()
3980                 if ($status eq '200 OK');
3981         if (defined $favicon) {
3982                 print qq(<link rel="shortcut icon" href=").esc_url($favicon).qq(" type="image/png" />\n);
3983         }
3984 }
3985
3986 sub print_nav_breadcrumbs_path {
3987         my $dirprefix = undef;
3988         while (my $part = shift) {
3989                 $dirprefix .= "/" if defined $dirprefix;
3990                 $dirprefix .= $part;
3991                 print $cgi->a({-href => href(project => undef,
3992                                              project_filter => $dirprefix,
3993                                              action => "project_list")},
3994                               esc_html($part)) . " / ";
3995         }
3996 }
3997
3998 sub print_nav_breadcrumbs {
3999         my %opts = @_;
4000
4001         for my $crumb (@extra_breadcrumbs, [ $home_link_str => $home_link ]) {
4002                 print $cgi->a({-href => esc_url($crumb->[1])}, $crumb->[0]) . " / ";
4003         }
4004         if (defined $project) {
4005                 my @dirname = split '/', $project;
4006                 my $projectbasename = pop @dirname;
4007                 print_nav_breadcrumbs_path(@dirname);
4008                 print $cgi->a({-href => href(action=>"summary")}, esc_html($projectbasename));
4009                 if (defined $action) {
4010                         my $action_print = $action ;
4011                         if (defined $opts{-action_extra}) {
4012                                 $action_print = $cgi->a({-href => href(action=>$action)},
4013                                         $action);
4014                         }
4015                         print " / $action_print";
4016                 }
4017                 if (defined $opts{-action_extra}) {
4018                         print " / $opts{-action_extra}";
4019                 }
4020                 print "\n";
4021         } elsif (defined $project_filter) {
4022                 print_nav_breadcrumbs_path(split '/', $project_filter);
4023         }
4024 }
4025
4026 sub print_search_form {
4027         if (!defined $searchtext) {
4028                 $searchtext = "";
4029         }
4030         my $search_hash;
4031         if (defined $hash_base) {
4032                 $search_hash = $hash_base;
4033         } elsif (defined $hash) {
4034                 $search_hash = $hash;
4035         } else {
4036                 $search_hash = "HEAD";
4037         }
4038         my $action = $my_uri;
4039         my $use_pathinfo = gitweb_check_feature('pathinfo');
4040         if ($use_pathinfo) {
4041                 $action .= "/".esc_url($project);
4042         }
4043         print $cgi->startform(-method => "get", -action => $action) .
4044               "<div class=\"search\">\n" .
4045               (!$use_pathinfo &&
4046               $cgi->input({-name=>"p", -value=>$project, -type=>"hidden"}) . "\n") .
4047               $cgi->input({-name=>"a", -value=>"search", -type=>"hidden"}) . "\n" .
4048               $cgi->input({-name=>"h", -value=>$search_hash, -type=>"hidden"}) . "\n" .
4049               $cgi->popup_menu(-name => 'st', -default => 'commit',
4050                                -values => ['commit', 'grep', 'author', 'committer', 'pickaxe']) .
4051               " " . $cgi->a({-href => href(action=>"search_help"),
4052                              -title => "search help" }, "?") . " search:\n",
4053               $cgi->textfield(-name => "s", -value => $searchtext, -override => 1) . "\n" .
4054               "<span title=\"Extended regular expression\">" .
4055               $cgi->checkbox(-name => 'sr', -value => 1, -label => 're',
4056                              -checked => $search_use_regexp) .
4057               "</span>" .
4058               "</div>" .
4059               $cgi->end_form() . "\n";
4060 }
4061
4062 sub git_header_html {
4063         my $status = shift || "200 OK";
4064         my $expires = shift;
4065         my %opts = @_;
4066
4067         my $title = get_page_title();
4068         my $content_type = get_content_type_html();
4069         print $cgi->header(-type=>$content_type, -charset => 'utf-8',
4070                            -status=> $status, -expires => $expires)
4071                 unless ($opts{'-no_http_header'});
4072         my $mod_perl_version = $ENV{'MOD_PERL'} ? " $ENV{'MOD_PERL'}" : '';
4073         print <<EOF;
4074 <?xml version="1.0" encoding="utf-8"?>
4075 <!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Strict//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-strict.dtd">
4076 <html xmlns="http://www.w3.org/1999/xhtml" xml:lang="en-US" lang="en-US">
4077 <!-- git web interface version $version, (C) 2005-2006, Kay Sievers <kay.sievers\@vrfy.org>, Christian Gierke -->
4078 <!-- git core binaries version $git_version -->
4079 <head>
4080 <meta http-equiv="content-type" content="$content_type; charset=utf-8"/>
4081 <meta name="generator" content="gitweb/$version git/$git_version$mod_perl_version"/>
4082 <meta name="robots" content="index, nofollow"/>
4083 <title>$title</title>
4084 EOF
4085         # the stylesheet, favicon etc urls won't work correctly with path_info
4086         # unless we set the appropriate base URL
4087         if ($ENV{'PATH_INFO'}) {
4088                 print "<base href=\"".esc_url($base_url)."\" />\n";
4089         }
4090         print_header_links($status);
4091
4092         if (defined $site_html_head_string) {
4093                 print to_utf8($site_html_head_string);
4094         }
4095
4096         print "</head>\n" .
4097               "<body>\n";
4098
4099         if (defined $site_header && -f $site_header) {
4100                 insert_file($site_header);
4101         }
4102
4103         print "<div class=\"page_header\">\n";
4104         if (defined $logo) {
4105                 print $cgi->a({-href => esc_url($logo_url),
4106                                -title => $logo_label},
4107                               $cgi->img({-src => esc_url($logo),
4108                                          -width => 72, -height => 27,
4109                                          -alt => "git",
4110                                          -class => "logo"}));
4111         }
4112         print_nav_breadcrumbs(%opts);
4113         print "</div>\n";
4114
4115         my $have_search = gitweb_check_feature('search');
4116         if (defined $project && $have_search) {
4117                 print_search_form();
4118         }
4119 }
4120
4121 sub git_footer_html {
4122         my $feed_class = 'rss_logo';
4123
4124         print "<div class=\"page_footer\">\n";
4125         if (defined $project) {
4126                 my $descr = git_get_project_description($project);
4127                 if (defined $descr) {
4128                         print "<div class=\"page_footer_text\">" . esc_html($descr) . "</div>\n";
4129                 }
4130
4131                 my %href_params = get_feed_info();
4132                 if (!%href_params) {
4133                         $feed_class .= ' generic';
4134                 }
4135                 $href_params{'-title'} ||= 'log';
4136
4137                 foreach my $format (qw(RSS Atom)) {
4138                         $href_params{'action'} = lc($format);
4139                         print $cgi->a({-href => href(%href_params),
4140                                       -title => "$href_params{'-title'} $format feed",
4141                                       -class => $feed_class}, $format)."\n";
4142                 }
4143
4144         } else {
4145                 print $cgi->a({-href => href(project=>undef, action=>"opml",
4146                                              project_filter => $project_filter),
4147                               -class => $feed_class}, "OPML") . " ";
4148                 print $cgi->a({-href => href(project=>undef, action=>"project_index",
4149                                              project_filter => $project_filter),
4150                               -class => $feed_class}, "TXT") . "\n";
4151         }
4152         print "</div>\n"; # class="page_footer"
4153
4154         if (defined $t0 && gitweb_check_feature('timed')) {
4155                 print "<div id=\"generating_info\">\n";
4156                 print 'This page took '.
4157                       '<span id="generating_time" class="time_span">'.
4158                       tv_interval($t0, [ gettimeofday() ]).
4159                       ' seconds </span>'.
4160                       ' and '.
4161                       '<span id="generating_cmd">'.
4162                       $number_of_git_cmds.
4163                       '</span> git commands '.
4164                       " to generate.\n";
4165                 print "</div>\n"; # class="page_footer"
4166         }
4167
4168         if (defined $site_footer && -f $site_footer) {
4169                 insert_file($site_footer);
4170         }
4171
4172         print qq!<script type="text/javascript" src="!.esc_url($javascript).qq!"></script>\n!;
4173         if (defined $action &&
4174             $action eq 'blame_incremental') {
4175                 print qq!<script type="text/javascript">\n!.
4176                       qq!startBlame("!. href(action=>"blame_data", -replay=>1) .qq!",\n!.
4177                       qq!           "!. href() .qq!");\n!.
4178                       qq!</script>\n!;
4179         } else {
4180                 my ($jstimezone, $tz_cookie, $datetime_class) =
4181                         gitweb_get_feature('javascript-timezone');
4182
4183                 print qq!<script type="text/javascript">\n!.
4184                       qq!window.onload = function () {\n!;
4185                 if (gitweb_check_feature('javascript-actions')) {
4186                         print qq!       fixLinks();\n!;
4187                 }
4188                 if ($jstimezone && $tz_cookie && $datetime_class) {
4189                         print qq!       var tz_cookie = { name: '$tz_cookie', expires: 14, path: '/' };\n!. # in days
4190                               qq!       onloadTZSetup('$jstimezone', tz_cookie, '$datetime_class');\n!;
4191                 }
4192                 print qq!};\n!.
4193                       qq!</script>\n!;
4194         }
4195
4196         print "</body>\n" .
4197               "</html>";
4198 }
4199
4200 # die_error(<http_status_code>, <error_message>[, <detailed_html_description>])
4201 # Example: die_error(404, 'Hash not found')
4202 # By convention, use the following status codes (as defined in RFC 2616):
4203 # 400: Invalid or missing CGI parameters, or
4204 #      requested object exists but has wrong type.
4205 # 403: Requested feature (like "pickaxe" or "snapshot") not enabled on
4206 #      this server or project.
4207 # 404: Requested object/revision/project doesn't exist.
4208 # 500: The server isn't configured properly, or
4209 #      an internal error occurred (e.g. failed assertions caused by bugs), or
4210 #      an unknown error occurred (e.g. the git binary died unexpectedly).
4211 # 503: The server is currently unavailable (because it is overloaded,
4212 #      or down for maintenance).  Generally, this is a temporary state.
4213 sub die_error {
4214         my $status = shift || 500;
4215         my $error = esc_html(shift) || "Internal Server Error";
4216         my $extra = shift;
4217         my %opts = @_;
4218
4219         my %http_responses = (
4220                 400 => '400 Bad Request',
4221                 403 => '403 Forbidden',
4222                 404 => '404 Not Found',
4223                 500 => '500 Internal Server Error',
4224                 503 => '503 Service Unavailable',
4225         );
4226         git_header_html($http_responses{$status}, undef, %opts);
4227         print <<EOF;
4228 <div class="page_body">
4229 <br /><br />
4230 $status - $error
4231 <br />
4232 EOF
4233         if (defined $extra) {
4234                 print "<hr />\n" .
4235                       "$extra\n";
4236         }
4237         print "</div>\n";
4238
4239         git_footer_html();
4240         goto DONE_GITWEB
4241                 unless ($opts{'-error_handler'});
4242 }
4243
4244 ## ----------------------------------------------------------------------
4245 ## functions printing or outputting HTML: navigation
4246
4247 sub git_print_page_nav {
4248         my ($current, $suppress, $head, $treehead, $treebase, $extra) = @_;
4249         $extra = '' if !defined $extra; # pager or formats
4250
4251         my @navs = qw(summary shortlog log commit commitdiff tree);
4252         if ($suppress) {
4253                 @navs = grep { $_ ne $suppress } @navs;
4254         }
4255
4256         my %arg = map { $_ => {action=>$_} } @navs;
4257         if (defined $head) {
4258                 for (qw(commit commitdiff)) {
4259                         $arg{$_}{'hash'} = $head;
4260                 }
4261                 if ($current =~ m/^(tree | log | shortlog | commit | commitdiff | search)$/x) {
4262                         for (qw(shortlog log)) {
4263                                 $arg{$_}{'hash'} = $head;
4264                         }
4265                 }
4266         }
4267
4268         $arg{'tree'}{'hash'} = $treehead if defined $treehead;
4269         $arg{'tree'}{'hash_base'} = $treebase if defined $treebase;
4270
4271         my @actions = gitweb_get_feature('actions');
4272         my %repl = (
4273                 '%' => '%',
4274                 'n' => $project,         # project name
4275                 'f' => $git_dir,         # project path within filesystem
4276                 'h' => $treehead || '',  # current hash ('h' parameter)
4277                 'b' => $treebase || '',  # hash base ('hb' parameter)
4278         );
4279         while (@actions) {
4280                 my ($label, $link, $pos) = splice(@actions,0,3);
4281                 # insert
4282                 @navs = map { $_ eq $pos ? ($_, $label) : $_ } @navs;
4283                 # munch munch
4284                 $link =~ s/%([%nfhb])/$repl{$1}/g;
4285                 $arg{$label}{'_href'} = $link;
4286         }
4287
4288         print "<div class=\"page_nav\">\n" .
4289                 (join " | ",
4290                  map { $_ eq $current ?
4291                        $_ : $cgi->a({-href => ($arg{$_}{_href} ? $arg{$_}{_href} : href(%{$arg{$_}}))}, "$_")
4292                  } @navs);
4293         print "<br/>\n$extra<br/>\n" .
4294               "</div>\n";
4295 }
4296
4297 # returns a submenu for the nagivation of the refs views (tags, heads,
4298 # remotes) with the current view disabled and the remotes view only
4299 # available if the feature is enabled
4300 sub format_ref_views {
4301         my ($current) = @_;
4302         my @ref_views = qw{tags heads};
4303         push @ref_views, 'remotes' if gitweb_check_feature('remote_heads');
4304         return join " | ", map {
4305                 $_ eq $current ? $_ :
4306                 $cgi->a({-href => href(action=>$_)}, $_)
4307         } @ref_views
4308 }
4309
4310 sub format_paging_nav {
4311         my ($action, $page, $has_next_link) = @_;
4312         my $paging_nav;
4313
4314
4315         if ($page > 0) {
4316                 $paging_nav .=
4317                         $cgi->a({-href => href(-replay=>1, page=>undef)}, "first") .
4318                         " &sdot; " .
4319                         $cgi->a({-href => href(-replay=>1, page=>$page-1),
4320                                  -accesskey => "p", -title => "Alt-p"}, "prev");
4321         } else {
4322                 $paging_nav .= "first &sdot; prev";
4323         }
4324
4325         if ($has_next_link) {
4326                 $paging_nav .= " &sdot; " .
4327                         $cgi->a({-href => href(-replay=>1, page=>$page+1),
4328                                  -accesskey => "n", -title => "Alt-n"}, "next");
4329         } else {
4330                 $paging_nav .= " &sdot; next";
4331         }
4332
4333         return $paging_nav;
4334 }
4335
4336 ## ......................................................................
4337 ## functions printing or outputting HTML: div
4338
4339 sub git_print_header_div {
4340         my ($action, $title, $hash, $hash_base) = @_;
4341         my %args = ();
4342
4343         $args{'action'} = $action;
4344         $args{'hash'} = $hash if $hash;
4345         $args{'hash_base'} = $hash_base if $hash_base;
4346
4347         print "<div class=\"header\">\n" .
4348               $cgi->a({-href => href(%args), -class => "title"},
4349               $title ? $title : $action) .
4350               "\n</div>\n";
4351 }
4352
4353 sub format_repo_url {
4354         my ($name, $url) = @_;
4355         return "<tr class=\"metadata_url\"><td>$name</td><td>$url</td></tr>\n";
4356 }
4357
4358 # Group output by placing it in a DIV element and adding a header.
4359 # Options for start_div() can be provided by passing a hash reference as the
4360 # first parameter to the function.
4361 # Options to git_print_header_div() can be provided by passing an array
4362 # reference. This must follow the options to start_div if they are present.
4363 # The content can be a scalar, which is output as-is, a scalar reference, which
4364 # is output after html escaping, an IO handle passed either as *handle or
4365 # *handle{IO}, or a function reference. In the latter case all following
4366 # parameters will be taken as argument to the content function call.
4367 sub git_print_section {
4368         my ($div_args, $header_args, $content);
4369         my $arg = shift;
4370         if (ref($arg) eq 'HASH') {
4371                 $div_args = $arg;
4372                 $arg = shift;
4373         }
4374         if (ref($arg) eq 'ARRAY') {
4375                 $header_args = $arg;
4376                 $arg = shift;
4377         }
4378         $content = $arg;
4379
4380         print $cgi->start_div($div_args);
4381         git_print_header_div(@$header_args);
4382
4383         if (ref($content) eq 'CODE') {
4384                 $content->(@_);
4385         } elsif (ref($content) eq 'SCALAR') {
4386                 print esc_html($$content);
4387         } elsif (ref($content) eq 'GLOB' or ref($content) eq 'IO::Handle') {
4388                 print <$content>;
4389         } elsif (!ref($content) && defined($content)) {
4390                 print $content;
4391         }
4392
4393         print $cgi->end_div;
4394 }
4395
4396 sub format_timestamp_html {
4397         my $date = shift;
4398         my $strtime = $date->{'rfc2822'};
4399
4400         my (undef, undef, $datetime_class) =
4401                 gitweb_get_feature('javascript-timezone');
4402         if ($datetime_class) {
4403                 $strtime = qq!<span class="$datetime_class">$strtime</span>!;
4404         }
4405
4406         my $localtime_format = '(%02d:%02d %s)';
4407         if ($date->{'hour_local'} < 6) {
4408                 $localtime_format = '(<span class="atnight">%02d:%02d</span> %s)';
4409         }
4410         $strtime .= ' ' .
4411                     sprintf($localtime_format,
4412                             $date->{'hour_local'}, $date->{'minute_local'}, $date->{'tz_local'});
4413
4414         return $strtime;
4415 }
4416
4417 # Outputs the author name and date in long form
4418 sub git_print_authorship {
4419         my $co = shift;
4420         my %opts = @_;
4421         my $tag = $opts{-tag} || 'div';
4422         my $author = $co->{'author_name'};
4423
4424         my %ad = parse_date($co->{'author_epoch'}, $co->{'author_tz'});
4425         print "<$tag class=\"author_date\">" .
4426               format_search_author($author, "author", esc_html($author)) .
4427               " [".format_timestamp_html(\%ad)."]".
4428               git_get_avatar($co->{'author_email'}, -pad_before => 1) .
4429               "</$tag>\n";
4430 }
4431
4432 # Outputs table rows containing the full author or committer information,
4433 # in the format expected for 'commit' view (& similar).
4434 # Parameters are a commit hash reference, followed by the list of people
4435 # to output information for. If the list is empty it defaults to both
4436 # author and committer.
4437 sub git_print_authorship_rows {
4438         my $co = shift;
4439         # too bad we can't use @people = @_ || ('author', 'committer')
4440         my @people = @_;
4441         @people = ('author', 'committer') unless @people;
4442         foreach my $who (@people) {
4443                 my %wd = parse_date($co->{"${who}_epoch"}, $co->{"${who}_tz"});
4444                 print "<tr><td>$who</td><td>" .
4445                       format_search_author($co->{"${who}_name"}, $who,
4446                                            esc_html($co->{"${who}_name"})) . " " .
4447                       format_search_author($co->{"${who}_email"}, $who,
4448                                            esc_html("<" . $co->{"${who}_email"} . ">")) .
4449                       "</td><td rowspan=\"2\">" .
4450                       git_get_avatar($co->{"${who}_email"}, -size => 'double') .
4451                       "</td></tr>\n" .
4452                       "<tr>" .
4453                       "<td></td><td>" .
4454                       format_timestamp_html(\%wd) .
4455                       "</td>" .
4456                       "</tr>\n";
4457         }
4458 }
4459
4460 sub git_print_page_path {
4461         my $name = shift;
4462         my $type = shift;
4463         my $hb = shift;
4464
4465
4466         print "<div class=\"page_path\">";
4467         print $cgi->a({-href => href(action=>"tree", hash_base=>$hb),
4468                       -title => 'tree root'}, to_utf8("[$project]"));
4469         print " / ";
4470         if (defined $name) {
4471                 my @dirname = split '/', $name;
4472                 my $basename = pop @dirname;
4473                 my $fullname = '';
4474
4475                 foreach my $dir (@dirname) {
4476                         $fullname .= ($fullname ? '/' : '') . $dir;
4477                         print $cgi->a({-href => href(action=>"tree", file_name=>$fullname,
4478                                                      hash_base=>$hb),
4479                                       -title => $fullname}, esc_path($dir));
4480                         print " / ";
4481                 }
4482                 if (defined $type && $type eq 'blob') {
4483                         print $cgi->a({-href => href(action=>"blob_plain", file_name=>$file_name,
4484                                                      hash_base=>$hb),
4485                                       -title => $name}, esc_path($basename));
4486                 } elsif (defined $type && $type eq 'tree') {
4487                         print $cgi->a({-href => href(action=>"tree", file_name=>$file_name,
4488                                                      hash_base=>$hb),
4489                                       -title => $name}, esc_path($basename));
4490                         print " / ";
4491                 } else {
4492                         print esc_path($basename);
4493                 }
4494         }
4495         print "<br/></div>\n";
4496 }
4497
4498 sub git_print_log {
4499         my $log = shift;
4500         my %opts = @_;
4501
4502         if ($opts{'-remove_title'}) {
4503                 # remove title, i.e. first line of log
4504                 shift @$log;
4505         }
4506         # remove leading empty lines
4507         while (defined $log->[0] && $log->[0] eq "") {
4508                 shift @$log;
4509         }
4510
4511         # print log
4512         my $skip_blank_line = 0;
4513         foreach my $line (@$log) {
4514                 if ($line =~ m/^\s*([A-Z][-A-Za-z]*-[Bb]y|C[Cc]): /) {
4515                         if (! $opts{'-remove_signoff'}) {
4516                                 print "<span class=\"signoff\">" . esc_html($line) . "</span><br/>\n";
4517                                 $skip_blank_line = 1;
4518                         }
4519                         next;
4520                 }
4521
4522                 if ($line =~ m,\s*([a-z]*link): (https?://\S+),i) {
4523                         if (! $opts{'-remove_signoff'}) {
4524                                 print "<span class=\"signoff\">" . esc_html($1) . ": " .
4525                                         "<a href=\"" . esc_html($2) . "\">" . esc_html($2) . "</a>" .
4526                                         "</span><br/>\n";
4527                                 $skip_blank_line = 1;
4528                         }
4529                         next;
4530                 }
4531
4532                 # print only one empty line
4533                 # do not print empty line after signoff
4534                 if ($line eq "") {
4535                         next if ($skip_blank_line);
4536                         $skip_blank_line = 1;
4537                 } else {
4538                         $skip_blank_line = 0;
4539                 }
4540
4541                 print format_log_line_html($line) . "<br/>\n";
4542         }
4543
4544         if ($opts{'-final_empty_line'}) {
4545                 # end with single empty line
4546                 print "<br/>\n" unless $skip_blank_line;
4547         }
4548 }
4549
4550 # return link target (what link points to)
4551 sub git_get_link_target {
4552         my $hash = shift;
4553         my $link_target;
4554
4555         # read link
4556         open my $fd, "-|", git_cmd(), "cat-file", "blob", $hash
4557                 or return;
4558         {
4559                 local $/ = undef;
4560                 $link_target = <$fd>;
4561         }
4562         close $fd
4563                 or return;
4564
4565         return $link_target;
4566 }
4567
4568 # given link target, and the directory (basedir) the link is in,
4569 # return target of link relative to top directory (top tree);
4570 # return undef if it is not possible (including absolute links).
4571 sub normalize_link_target {
4572         my ($link_target, $basedir) = @_;
4573
4574         # absolute symlinks (beginning with '/') cannot be normalized
4575         return if (substr($link_target, 0, 1) eq '/');
4576
4577         # normalize link target to path from top (root) tree (dir)
4578         my $path;
4579         if ($basedir) {
4580                 $path = $basedir . '/' . $link_target;
4581         } else {
4582                 # we are in top (root) tree (dir)
4583                 $path = $link_target;
4584         }
4585
4586         # remove //, /./, and /../
4587         my @path_parts;
4588         foreach my $part (split('/', $path)) {
4589                 # discard '.' and ''
4590                 next if (!$part || $part eq '.');
4591                 # handle '..'
4592                 if ($part eq '..') {
4593                         if (@path_parts) {
4594                                 pop @path_parts;
4595                         } else {
4596                                 # link leads outside repository (outside top dir)
4597                                 return;
4598                         }
4599                 } else {
4600                         push @path_parts, $part;
4601                 }
4602         }
4603         $path = join('/', @path_parts);
4604
4605         return $path;
4606 }
4607
4608 # print tree entry (row of git_tree), but without encompassing <tr> element
4609 sub git_print_tree_entry {
4610         my ($t, $basedir, $hash_base, $have_blame) = @_;
4611
4612         my %base_key = ();
4613         $base_key{'hash_base'} = $hash_base if defined $hash_base;
4614
4615         # The format of a table row is: mode list link.  Where mode is
4616         # the mode of the entry, list is the name of the entry, an href,
4617         # and link is the action links of the entry.
4618
4619         print "<td class=\"mode\">" . mode_str($t->{'mode'}) . "</td>\n";
4620         if (exists $t->{'size'}) {
4621                 print "<td class=\"size\">$t->{'size'}</td>\n";
4622         }
4623         if ($t->{'type'} eq "blob") {
4624                 print "<td class=\"list\">" .
4625                         $cgi->a({-href => href(action=>"blob", hash=>$t->{'hash'},
4626                                                file_name=>"$basedir$t->{'name'}", %base_key),
4627                                 -class => "list"}, esc_path($t->{'name'}));
4628                 if (S_ISLNK(oct $t->{'mode'})) {
4629                         my $link_target = git_get_link_target($t->{'hash'});
4630                         if ($link_target) {
4631                                 my $norm_target = normalize_link_target($link_target, $basedir);
4632                                 if (defined $norm_target) {
4633                                         print " -> " .
4634                                               $cgi->a({-href => href(action=>"object", hash_base=>$hash_base,
4635                                                                      file_name=>$norm_target),
4636                                                        -title => $norm_target}, esc_path($link_target));
4637                                 } else {
4638                                         print " -> " . esc_path($link_target);
4639                                 }
4640                         }
4641                 }
4642                 print "</td>\n";
4643                 print "<td class=\"link\">";
4644                 print $cgi->a({-href => href(action=>"blob", hash=>$t->{'hash'},
4645                                              file_name=>"$basedir$t->{'name'}", %base_key)},
4646                               "blob");
4647                 if ($have_blame) {
4648                         print " | " .
4649                               $cgi->a({-href => href(action=>"blame", hash=>$t->{'hash'},
4650                                                      file_name=>"$basedir$t->{'name'}", %base_key)},
4651                                       "blame");
4652                 }
4653                 if (defined $hash_base) {
4654                         print " | " .
4655                               $cgi->a({-href => href(action=>"history", hash_base=>$hash_base,
4656                                                      hash=>$t->{'hash'}, file_name=>"$basedir$t->{'name'}")},
4657                                       "history");
4658                 }
4659                 print " | " .
4660                         $cgi->a({-href => href(action=>"blob_plain", hash_base=>$hash_base,
4661                                                file_name=>"$basedir$t->{'name'}")},
4662                                 "raw");
4663                 print "</td>\n";
4664
4665         } elsif ($t->{'type'} eq "tree") {
4666                 print "<td class=\"list\">";
4667                 print $cgi->a({-href => href(action=>"tree", hash=>$t->{'hash'},
4668                                              file_name=>"$basedir$t->{'name'}",
4669                                              %base_key)},
4670                               esc_path($t->{'name'}));
4671                 print "</td>\n";
4672                 print "<td class=\"link\">";
4673                 print $cgi->a({-href => href(action=>"tree", hash=>$t->{'hash'},
4674                                              file_name=>"$basedir$t->{'name'}",
4675                                              %base_key)},
4676                               "tree");
4677                 if (defined $hash_base) {
4678                         print " | " .
4679                               $cgi->a({-href => href(action=>"history", hash_base=>$hash_base,
4680                                                      file_name=>"$basedir$t->{'name'}")},
4681                                       "history");
4682                 }
4683                 print "</td>\n";
4684         } else {
4685                 # unknown object: we can only present history for it
4686                 # (this includes 'commit' object, i.e. submodule support)
4687                 print "<td class=\"list\">" .
4688                       esc_path($t->{'name'}) .
4689                       "</td>\n";
4690                 print "<td class=\"link\">";
4691                 if (defined $hash_base) {
4692                         print $cgi->a({-href => href(action=>"history",
4693                                                      hash_base=>$hash_base,
4694                                                      file_name=>"$basedir$t->{'name'}")},
4695                                       "history");
4696                 }
4697                 print "</td>\n";
4698         }
4699 }
4700
4701 ## ......................................................................
4702 ## functions printing large fragments of HTML
4703
4704 # get pre-image filenames for merge (combined) diff
4705 sub fill_from_file_info {
4706         my ($diff, @parents) = @_;
4707
4708         $diff->{'from_file'} = [ ];
4709         $diff->{'from_file'}[$diff->{'nparents'} - 1] = undef;
4710         for (my $i = 0; $i < $diff->{'nparents'}; $i++) {
4711                 if ($diff->{'status'}[$i] eq 'R' ||
4712                     $diff->{'status'}[$i] eq 'C') {
4713                         $diff->{'from_file'}[$i] =
4714                                 git_get_path_by_hash($parents[$i], $diff->{'from_id'}[$i]);
4715                 }
4716         }
4717
4718         return $diff;
4719 }
4720
4721 # is current raw difftree line of file deletion
4722 sub is_deleted {
4723         my $diffinfo = shift;
4724
4725         return $diffinfo->{'to_id'} eq ('0' x 40);
4726 }
4727
4728 # does patch correspond to [previous] difftree raw line
4729 # $diffinfo  - hashref of parsed raw diff format
4730 # $patchinfo - hashref of parsed patch diff format
4731 #              (the same keys as in $diffinfo)
4732 sub is_patch_split {
4733         my ($diffinfo, $patchinfo) = @_;
4734
4735         return defined $diffinfo && defined $patchinfo
4736                 && $diffinfo->{'to_file'} eq $patchinfo->{'to_file'};
4737 }
4738
4739
4740 sub git_difftree_body {
4741         my ($difftree, $hash, @parents) = @_;
4742         my ($parent) = $parents[0];
4743         my $have_blame = gitweb_check_feature('blame');
4744         print "<div class=\"list_head\">\n";
4745         if ($#{$difftree} > 10) {
4746                 print(($#{$difftree} + 1) . " files changed:\n");
4747         }
4748         print "</div>\n";
4749
4750         print "<table class=\"" .
4751               (@parents > 1 ? "combined " : "") .
4752               "diff_tree\">\n";
4753
4754         # header only for combined diff in 'commitdiff' view
4755         my $has_header = @$difftree && @parents > 1 && $action eq 'commitdiff';
4756         if ($has_header) {
4757                 # table header
4758                 print "<thead><tr>\n" .
4759                        "<th></th><th></th>\n"; # filename, patchN link
4760                 for (my $i = 0; $i < @parents; $i++) {
4761                         my $par = $parents[$i];
4762                         print "<th>" .
4763                               $cgi->a({-href => href(action=>"commitdiff",
4764                                                      hash=>$hash, hash_parent=>$par),
4765                                        -title => 'commitdiff to parent number ' .
4766                                                   ($i+1) . ': ' . substr($par,0,7)},
4767                                       $i+1) .
4768                               "&nbsp;</th>\n";
4769                 }
4770                 print "</tr></thead>\n<tbody>\n";
4771         }
4772
4773         my $alternate = 1;
4774         my $patchno = 0;
4775         foreach my $line (@{$difftree}) {
4776                 my $diff = parsed_difftree_line($line);
4777
4778                 if ($alternate) {
4779                         print "<tr class=\"dark\">\n";
4780                 } else {
4781                         print "<tr class=\"light\">\n";
4782                 }
4783                 $alternate ^= 1;
4784
4785                 if (exists $diff->{'nparents'}) { # combined diff
4786
4787                         fill_from_file_info($diff, @parents)
4788                                 unless exists $diff->{'from_file'};
4789
4790                         if (!is_deleted($diff)) {
4791                                 # file exists in the result (child) commit
4792                                 print "<td>" .
4793                                       $cgi->a({-href => href(action=>"blob", hash=>$diff->{'to_id'},
4794                                                              file_name=>$diff->{'to_file'},
4795                                                              hash_base=>$hash),
4796                                               -class => "list"}, esc_path($diff->{'to_file'})) .
4797                                       "</td>\n";
4798                         } else {
4799                                 print "<td>" .
4800                                       esc_path($diff->{'to_file'}) .
4801                                       "</td>\n";
4802                         }
4803
4804                         if ($action eq 'commitdiff') {
4805                                 # link to patch
4806                                 $patchno++;
4807                                 print "<td class=\"link\">" .
4808                                       $cgi->a({-href => href(-anchor=>"patch$patchno")},
4809                                               "patch") .
4810                                       " | " .
4811                                       "</td>\n";
4812                         }
4813
4814                         my $has_history = 0;
4815                         my $not_deleted = 0;
4816                         for (my $i = 0; $i < $diff->{'nparents'}; $i++) {
4817                                 my $hash_parent = $parents[$i];
4818                                 my $from_hash = $diff->{'from_id'}[$i];
4819                                 my $from_path = $diff->{'from_file'}[$i];
4820                                 my $status = $diff->{'status'}[$i];
4821
4822                                 $has_history ||= ($status ne 'A');
4823                                 $not_deleted ||= ($status ne 'D');
4824
4825                                 if ($status eq 'A') {
4826                                         print "<td  class=\"link\" align=\"right\"> | </td>\n";
4827                                 } elsif ($status eq 'D') {
4828                                         print "<td class=\"link\">" .
4829                                               $cgi->a({-href => href(action=>"blob",
4830                                                                      hash_base=>$hash,
4831                                                                      hash=>$from_hash,
4832                                                                      file_name=>$from_path)},
4833                                                       "blob" . ($i+1)) .
4834                                               " | </td>\n";
4835                                 } else {
4836                                         if ($diff->{'to_id'} eq $from_hash) {
4837                                                 print "<td class=\"link nochange\">";
4838                                         } else {
4839                                                 print "<td class=\"link\">";
4840                                         }
4841                                         print $cgi->a({-href => href(action=>"blobdiff",
4842                                                                      hash=>$diff->{'to_id'},
4843                                                                      hash_parent=>$from_hash,
4844                                                                      hash_base=>$hash,
4845                                                                      hash_parent_base=>$hash_parent,
4846                                                                      file_name=>$diff->{'to_file'},
4847                                                                      file_parent=>$from_path)},
4848                                                       "diff" . ($i+1)) .
4849                                               " | </td>\n";
4850                                 }
4851                         }
4852
4853                         print "<td class=\"link\">";
4854                         if ($not_deleted) {
4855                                 print $cgi->a({-href => href(action=>"blob",
4856                                                              hash=>$diff->{'to_id'},
4857                                                              file_name=>$diff->{'to_file'},
4858                                                              hash_base=>$hash)},
4859                                               "blob");
4860                                 print " | " if ($has_history);
4861                         }
4862                         if ($has_history) {
4863                                 print $cgi->a({-href => href(action=>"history",
4864                                                              file_name=>$diff->{'to_file'},
4865                                                              hash_base=>$hash)},
4866                                               "history");
4867                         }
4868                         print "</td>\n";
4869
4870                         print "</tr>\n";
4871                         next; # instead of 'else' clause, to avoid extra indent
4872                 }
4873                 # else ordinary diff
4874
4875                 my ($to_mode_oct, $to_mode_str, $to_file_type);
4876                 my ($from_mode_oct, $from_mode_str, $from_file_type);
4877                 if ($diff->{'to_mode'} ne ('0' x 6)) {
4878                         $to_mode_oct = oct $diff->{'to_mode'};
4879                         if (S_ISREG($to_mode_oct)) { # only for regular file
4880                                 $to_mode_str = sprintf("%04o", $to_mode_oct & 0777); # permission bits
4881                         }
4882                         $to_file_type = file_type($diff->{'to_mode'});
4883                 }
4884                 if ($diff->{'from_mode'} ne ('0' x 6)) {
4885                         $from_mode_oct = oct $diff->{'from_mode'};
4886                         if (S_ISREG($from_mode_oct)) { # only for regular file
4887                                 $from_mode_str = sprintf("%04o", $from_mode_oct & 0777); # permission bits
4888                         }
4889                         $from_file_type = file_type($diff->{'from_mode'});
4890                 }
4891
4892                 if ($diff->{'status'} eq "A") { # created
4893                         my $mode_chng = "<span class=\"file_status new\">[new $to_file_type";
4894                         $mode_chng   .= " with mode: $to_mode_str" if $to_mode_str;
4895                         $mode_chng   .= "]</span>";
4896                         print "<td>";
4897                         print $cgi->a({-href => href(action=>"blob", hash=>$diff->{'to_id'},
4898                                                      hash_base=>$hash, file_name=>$diff->{'file'}),
4899                                       -class => "list"}, esc_path($diff->{'file'}));
4900                         print "</td>\n";
4901                         print "<td>$mode_chng</td>\n";
4902                         print "<td class=\"link\">";
4903                         if ($action eq 'commitdiff') {
4904                                 # link to patch
4905                                 $patchno++;
4906                                 print $cgi->a({-href => href(-anchor=>"patch$patchno")},
4907                                               "patch") .
4908                                       " | ";
4909                         }
4910                         print $cgi->a({-href => href(action=>"blob", hash=>$diff->{'to_id'},
4911                                                      hash_base=>$hash, file_name=>$diff->{'file'})},
4912                                       "blob");
4913                         print "</td>\n";
4914
4915                 } elsif ($diff->{'status'} eq "D") { # deleted
4916                         my $mode_chng = "<span class=\"file_status deleted\">[deleted $from_file_type]</span>";
4917                         print "<td>";
4918                         print $cgi->a({-href => href(action=>"blob", hash=>$diff->{'from_id'},
4919                                                      hash_base=>$parent, file_name=>$diff->{'file'}),
4920                                        -class => "list"}, esc_path($diff->{'file'}));
4921                         print "</td>\n";
4922                         print "<td>$mode_chng</td>\n";
4923                         print "<td class=\"link\">";
4924                         if ($action eq 'commitdiff') {
4925                                 # link to patch
4926                                 $patchno++;
4927                                 print $cgi->a({-href => href(-anchor=>"patch$patchno")},
4928                                               "patch") .
4929                                       " | ";
4930                         }
4931                         print $cgi->a({-href => href(action=>"blob", hash=>$diff->{'from_id'},
4932                                                      hash_base=>$parent, file_name=>$diff->{'file'})},
4933                                       "blob") . " | ";
4934                         if ($have_blame) {
4935                                 print $cgi->a({-href => href(action=>"blame", hash_base=>$parent,
4936                                                              file_name=>$diff->{'file'})},
4937                                               "blame") . " | ";
4938                         }
4939                         print $cgi->a({-href => href(action=>"history", hash_base=>$parent,
4940                                                      file_name=>$diff->{'file'})},
4941                                       "history");
4942                         print "</td>\n";
4943
4944                 } elsif ($diff->{'status'} eq "M" || $diff->{'status'} eq "T") { # modified, or type changed
4945                         my $mode_chnge = "";
4946                         if ($diff->{'from_mode'} != $diff->{'to_mode'}) {
4947                                 $mode_chnge = "<span class=\"file_status mode_chnge\">[changed";
4948                                 if ($from_file_type ne $to_file_type) {
4949                                         $mode_chnge .= " from $from_file_type to $to_file_type";
4950                                 }
4951                                 if (($from_mode_oct & 0777) != ($to_mode_oct & 0777)) {
4952                                         if ($from_mode_str && $to_mode_str) {
4953                                                 $mode_chnge .= " mode: $from_mode_str->$to_mode_str";
4954                                         } elsif ($to_mode_str) {
4955                                                 $mode_chnge .= " mode: $to_mode_str";
4956                                         }
4957                                 }
4958                                 $mode_chnge .= "]</span>\n";
4959                         }
4960                         print "<td>";
4961                         print $cgi->a({-href => href(action=>"blob", hash=>$diff->{'to_id'},
4962                                                      hash_base=>$hash, file_name=>$diff->{'file'}),
4963                                       -class => "list"}, esc_path($diff->{'file'}));
4964                         print "</td>\n";
4965                         print "<td>$mode_chnge</td>\n";
4966                         print "<td class=\"link\">";
4967                         if ($action eq 'commitdiff') {
4968                                 # link to patch
4969                                 $patchno++;
4970                                 print $cgi->a({-href => href(-anchor=>"patch$patchno")},
4971                                               "patch") .
4972                                       " | ";
4973                         } elsif ($diff->{'to_id'} ne $diff->{'from_id'}) {
4974                                 # "commit" view and modified file (not onlu mode changed)
4975                                 print $cgi->a({-href => href(action=>"blobdiff",
4976                                                              hash=>$diff->{'to_id'}, hash_parent=>$diff->{'from_id'},
4977                                                              hash_base=>$hash, hash_parent_base=>$parent,
4978                                                              file_name=>$diff->{'file'})},
4979                                               "diff") .
4980                                       " | ";
4981                         }
4982                         print $cgi->a({-href => href(action=>"blob", hash=>$diff->{'to_id'},
4983                                                      hash_base=>$hash, file_name=>$diff->{'file'})},
4984                                        "blob") . " | ";
4985                         if ($have_blame) {
4986                                 print $cgi->a({-href => href(action=>"blame", hash_base=>$hash,
4987                                                              file_name=>$diff->{'file'})},
4988                                               "blame") . " | ";
4989                         }
4990                         print $cgi->a({-href => href(action=>"history", hash_base=>$hash,
4991                                                      file_name=>$diff->{'file'})},
4992                                       "history");
4993                         print "</td>\n";
4994
4995                 } elsif ($diff->{'status'} eq "R" || $diff->{'status'} eq "C") { # renamed or copied
4996                         my %status_name = ('R' => 'moved', 'C' => 'copied');
4997                         my $nstatus = $status_name{$diff->{'status'}};
4998                         my $mode_chng = "";
4999                         if ($diff->{'from_mode'} != $diff->{'to_mode'}) {
5000                                 # mode also for directories, so we cannot use $to_mode_str
5001                                 $mode_chng = sprintf(", mode: %04o", $to_mode_oct & 0777);
5002                         }
5003                         print "<td>" .
5004                               $cgi->a({-href => href(action=>"blob", hash_base=>$hash,
5005                                                      hash=>$diff->{'to_id'}, file_name=>$diff->{'to_file'}),
5006                                       -class => "list"}, esc_path($diff->{'to_file'})) . "</td>\n" .
5007                               "<td><span class=\"file_status $nstatus\">[$nstatus from " .
5008                               $cgi->a({-href => href(action=>"blob", hash_base=>$parent,
5009                                                      hash=>$diff->{'from_id'}, file_name=>$diff->{'from_file'}),
5010                                       -class => "list"}, esc_path($diff->{'from_file'})) .
5011                               " with " . (int $diff->{'similarity'}) . "% similarity$mode_chng]</span></td>\n" .
5012                               "<td class=\"link\">";
5013                         if ($action eq 'commitdiff') {
5014                                 # link to patch
5015                                 $patchno++;
5016                                 print $cgi->a({-href => href(-anchor=>"patch$patchno")},
5017                                               "patch") .
5018                                       " | ";
5019                         } elsif ($diff->{'to_id'} ne $diff->{'from_id'}) {
5020                                 # "commit" view and modified file (not only pure rename or copy)
5021                                 print $cgi->a({-href => href(action=>"blobdiff",
5022                                                              hash=>$diff->{'to_id'}, hash_parent=>$diff->{'from_id'},
5023                                                              hash_base=>$hash, hash_parent_base=>$parent,
5024                                                              file_name=>$diff->{'to_file'}, file_parent=>$diff->{'from_file'})},
5025                                               "diff") .
5026                                       " | ";
5027                         }
5028                         print $cgi->a({-href => href(action=>"blob", hash=>$diff->{'to_id'},
5029                                                      hash_base=>$parent, file_name=>$diff->{'to_file'})},
5030                                       "blob") . " | ";
5031                         if ($have_blame) {
5032                                 print $cgi->a({-href => href(action=>"blame", hash_base=>$hash,
5033                                                              file_name=>$diff->{'to_file'})},
5034                                               "blame") . " | ";
5035                         }
5036                         print $cgi->a({-href => href(action=>"history", hash_base=>$hash,
5037                                                     file_name=>$diff->{'to_file'})},
5038                                       "history");
5039                         print "</td>\n";
5040
5041                 } # we should not encounter Unmerged (U) or Unknown (X) status
5042                 print "</tr>\n";
5043         }
5044         print "</tbody>" if $has_header;
5045         print "</table>\n";
5046 }
5047
5048 # Print context lines and then rem/add lines in a side-by-side manner.
5049 sub print_sidebyside_diff_lines {
5050         my ($ctx, $rem, $add) = @_;
5051
5052         # print context block before add/rem block
5053         if (@$ctx) {
5054                 print join '',
5055                         '<div class="chunk_block ctx">',
5056                                 '<div class="old">',
5057                                 @$ctx,
5058                                 '</div>',
5059                                 '<div class="new">',
5060                                 @$ctx,
5061                                 '</div>',
5062                         '</div>';
5063         }
5064
5065         if (!@$add) {
5066                 # pure removal
5067                 print join '',
5068                         '<div class="chunk_block rem">',
5069                                 '<div class="old">',
5070                                 @$rem,
5071                                 '</div>',
5072                         '</div>';
5073         } elsif (!@$rem) {
5074                 # pure addition
5075                 print join '',
5076                         '<div class="chunk_block add">',
5077                                 '<div class="new">',
5078                                 @$add,
5079                                 '</div>',
5080                         '</div>';
5081         } else {
5082                 print join '',
5083                         '<div class="chunk_block chg">',
5084                                 '<div class="old">',
5085                                 @$rem,
5086                                 '</div>',
5087                                 '<div class="new">',
5088                                 @$add,
5089                                 '</div>',
5090                         '</div>';
5091         }
5092 }
5093
5094 # Print context lines and then rem/add lines in inline manner.
5095 sub print_inline_diff_lines {
5096         my ($ctx, $rem, $add) = @_;
5097
5098         print @$ctx, @$rem, @$add;
5099 }
5100
5101 # Format removed and added line, mark changed part and HTML-format them.
5102 # Implementation is based on contrib/diff-highlight
5103 sub format_rem_add_lines_pair {
5104         my ($rem, $add, $num_parents) = @_;
5105
5106         # We need to untabify lines before split()'ing them;
5107         # otherwise offsets would be invalid.
5108         chomp $rem;
5109         chomp $add;
5110         $rem = untabify($rem);
5111         $add = untabify($add);
5112
5113         my @rem = split(//, $rem);
5114         my @add = split(//, $add);
5115         my ($esc_rem, $esc_add);
5116         # Ignore leading +/- characters for each parent.
5117         my ($prefix_len, $suffix_len) = ($num_parents, 0);
5118         my ($prefix_has_nonspace, $suffix_has_nonspace);
5119
5120         my $shorter = (@rem < @add) ? @rem : @add;
5121         while ($prefix_len < $shorter) {
5122                 last if ($rem[$prefix_len] ne $add[$prefix_len]);
5123
5124                 $prefix_has_nonspace = 1 if ($rem[$prefix_len] !~ /\s/);
5125                 $prefix_len++;
5126         }
5127
5128         while ($prefix_len + $suffix_len < $shorter) {
5129                 last if ($rem[-1 - $suffix_len] ne $add[-1 - $suffix_len]);
5130
5131                 $suffix_has_nonspace = 1 if ($rem[-1 - $suffix_len] !~ /\s/);
5132                 $suffix_len++;
5133         }
5134
5135         # Mark lines that are different from each other, but have some common
5136         # part that isn't whitespace.  If lines are completely different, don't
5137         # mark them because that would make output unreadable, especially if
5138         # diff consists of multiple lines.
5139         if ($prefix_has_nonspace || $suffix_has_nonspace) {
5140                 $esc_rem = esc_html_hl_regions($rem, 'marked',
5141                         [$prefix_len, @rem - $suffix_len], -nbsp=>1);
5142                 $esc_add = esc_html_hl_regions($add, 'marked',
5143                         [$prefix_len, @add - $suffix_len], -nbsp=>1);
5144         } else {
5145                 $esc_rem = esc_html($rem, -nbsp=>1);
5146                 $esc_add = esc_html($add, -nbsp=>1);
5147         }
5148
5149         return format_diff_line(\$esc_rem, 'rem'),
5150                format_diff_line(\$esc_add, 'add');
5151 }
5152
5153 # HTML-format diff context, removed and added lines.
5154 sub format_ctx_rem_add_lines {
5155         my ($ctx, $rem, $add, $num_parents) = @_;
5156         my (@new_ctx, @new_rem, @new_add);
5157         my $can_highlight = 0;
5158         my $is_combined = ($num_parents > 1);
5159
5160         # Highlight if every removed line has a corresponding added line.
5161         if (@$add > 0 && @$add == @$rem) {
5162                 $can_highlight = 1;
5163
5164                 # Highlight lines in combined diff only if the chunk contains
5165                 # diff between the same version, e.g.
5166                 #
5167                 #    - a
5168                 #   -  b
5169                 #    + c
5170                 #   +  d
5171                 #
5172                 # Otherwise the highlightling would be confusing.
5173                 if ($is_combined) {
5174                         for (my $i = 0; $i < @$add; $i++) {
5175                                 my $prefix_rem = substr($rem->[$i], 0, $num_parents);
5176                                 my $prefix_add = substr($add->[$i], 0, $num_parents);
5177
5178                                 $prefix_rem =~ s/-/+/g;
5179
5180                                 if ($prefix_rem ne $prefix_add) {
5181                                         $can_highlight = 0;
5182                                         last;
5183                                 }
5184                         }
5185                 }
5186         }
5187
5188         if ($can_highlight) {
5189                 for (my $i = 0; $i < @$add; $i++) {
5190                         my ($line_rem, $line_add) = format_rem_add_lines_pair(
5191                                 $rem->[$i], $add->[$i], $num_parents);
5192                         push @new_rem, $line_rem;
5193                         push @new_add, $line_add;
5194                 }
5195         } else {
5196                 @new_rem = map { format_diff_line($_, 'rem') } @$rem;
5197                 @new_add = map { format_diff_line($_, 'add') } @$add;
5198         }
5199
5200         @new_ctx = map { format_diff_line($_, 'ctx') } @$ctx;
5201
5202         return (\@new_ctx, \@new_rem, \@new_add);
5203 }
5204
5205 # Print context lines and then rem/add lines.
5206 sub print_diff_lines {
5207         my ($ctx, $rem, $add, $diff_style, $num_parents) = @_;
5208         my $is_combined = $num_parents > 1;
5209
5210         ($ctx, $rem, $add) = format_ctx_rem_add_lines($ctx, $rem, $add,
5211                 $num_parents);
5212
5213         if ($diff_style eq 'sidebyside' && !$is_combined) {
5214                 print_sidebyside_diff_lines($ctx, $rem, $add);
5215         } else {
5216                 # default 'inline' style and unknown styles
5217                 print_inline_diff_lines($ctx, $rem, $add);
5218         }
5219 }
5220
5221 sub print_diff_chunk {
5222         my ($diff_style, $num_parents, $from, $to, @chunk) = @_;
5223         my (@ctx, @rem, @add);
5224
5225         # The class of the previous line.
5226         my $prev_class = '';
5227
5228         return unless @chunk;
5229
5230         # incomplete last line might be among removed or added lines,
5231         # or both, or among context lines: find which
5232         for (my $i = 1; $i < @chunk; $i++) {
5233                 if ($chunk[$i][0] eq 'incomplete') {
5234                         $chunk[$i][0] = $chunk[$i-1][0];
5235                 }
5236         }
5237
5238         # guardian
5239         push @chunk, ["", ""];
5240
5241         foreach my $line_info (@chunk) {
5242                 my ($class, $line) = @$line_info;
5243
5244                 # print chunk headers
5245                 if ($class && $class eq 'chunk_header') {
5246                         print format_diff_line($line, $class, $from, $to);
5247                         next;
5248                 }
5249
5250                 ## print from accumulator when have some add/rem lines or end
5251                 # of chunk (flush context lines), or when have add and rem
5252                 # lines and new block is reached (otherwise add/rem lines could
5253                 # be reordered)
5254                 if (!$class || ((@rem || @add) && $class eq 'ctx') ||
5255                     (@rem && @add && $class ne $prev_class)) {
5256                         print_diff_lines(\@ctx, \@rem, \@add,
5257                                          $diff_style, $num_parents);
5258                         @ctx = @rem = @add = ();
5259                 }
5260
5261                 ## adding lines to accumulator
5262                 # guardian value
5263                 last unless $line;
5264                 # rem, add or change
5265                 if ($class eq 'rem') {
5266                         push @rem, $line;
5267                 } elsif ($class eq 'add') {
5268                         push @add, $line;
5269                 }
5270                 # context line
5271                 if ($class eq 'ctx') {
5272                         push @ctx, $line;
5273                 }
5274
5275                 $prev_class = $class;
5276         }
5277 }
5278
5279 sub git_patchset_body {
5280         my ($fd, $diff_style, $difftree, $hash, @hash_parents) = @_;
5281         my ($hash_parent) = $hash_parents[0];
5282
5283         my $is_combined = (@hash_parents > 1);
5284         my $patch_idx = 0;
5285         my $patch_number = 0;
5286         my $patch_line;
5287         my $diffinfo;
5288         my $to_name;
5289         my (%from, %to);
5290         my @chunk; # for side-by-side diff
5291
5292         print "<div class=\"patchset\">\n";
5293
5294         # skip to first patch
5295         while ($patch_line = <$fd>) {
5296                 chomp $patch_line;
5297
5298                 last if ($patch_line =~ m/^diff /);
5299         }
5300
5301  PATCH:
5302         while ($patch_line) {
5303
5304                 # parse "git diff" header line
5305                 if ($patch_line =~ m/^diff --git (\"(?:[^\\\"]*(?:\\.[^\\\"]*)*)\"|[^ "]*) (.*)$/) {
5306                         # $1 is from_name, which we do not use
5307                         $to_name = unquote($2);
5308                         $to_name =~ s!^b/!!;
5309                 } elsif ($patch_line =~ m/^diff --(cc|combined) ("?.*"?)$/) {
5310                         # $1 is 'cc' or 'combined', which we do not use
5311                         $to_name = unquote($2);
5312                 } else {
5313                         $to_name = undef;
5314                 }
5315
5316                 # check if current patch belong to current raw line
5317                 # and parse raw git-diff line if needed
5318                 if (is_patch_split($diffinfo, { 'to_file' => $to_name })) {
5319                         # this is continuation of a split patch
5320                         print "<div class=\"patch cont\">\n";
5321                 } else {
5322                         # advance raw git-diff output if needed
5323                         $patch_idx++ if defined $diffinfo;
5324
5325                         # read and prepare patch information
5326                         $diffinfo = parsed_difftree_line($difftree->[$patch_idx]);
5327
5328                         # compact combined diff output can have some patches skipped
5329                         # find which patch (using pathname of result) we are at now;
5330                         if ($is_combined) {
5331                                 while ($to_name ne $diffinfo->{'to_file'}) {
5332                                         print "<div class=\"patch\" id=\"patch". ($patch_idx+1) ."\">\n" .
5333                                               format_diff_cc_simplified($diffinfo, @hash_parents) .
5334                                               "</div>\n";  # class="patch"
5335
5336                                         $patch_idx++;
5337                                         $patch_number++;
5338
5339                                         last if $patch_idx > $#$difftree;
5340                                         $diffinfo = parsed_difftree_line($difftree->[$patch_idx]);
5341                                 }
5342                         }
5343
5344                         # modifies %from, %to hashes
5345                         parse_from_to_diffinfo($diffinfo, \%from, \%to, @hash_parents);
5346
5347                         # this is first patch for raw difftree line with $patch_idx index
5348                         # we index @$difftree array from 0, but number patches from 1
5349                         print "<div class=\"patch\" id=\"patch". ($patch_idx+1) ."\">\n";
5350                 }
5351
5352                 # git diff header
5353                 #assert($patch_line =~ m/^diff /) if DEBUG;
5354                 #assert($patch_line !~ m!$/$!) if DEBUG; # is chomp-ed
5355                 $patch_number++;
5356                 # print "git diff" header
5357                 print format_git_diff_header_line($patch_line, $diffinfo,
5358                                                   \%from, \%to);
5359
5360                 # print extended diff header
5361                 print "<div class=\"diff extended_header\">\n";
5362         EXTENDED_HEADER:
5363                 while ($patch_line = <$fd>) {
5364                         chomp $patch_line;
5365
5366                         last EXTENDED_HEADER if ($patch_line =~ m/^--- |^diff /);
5367
5368                         print format_extended_diff_header_line($patch_line, $diffinfo,
5369                                                                \%from, \%to);
5370                 }
5371                 print "</div>\n"; # class="diff extended_header"
5372
5373                 # from-file/to-file diff header
5374                 if (! $patch_line) {
5375                         print "</div>\n"; # class="patch"
5376                         last PATCH;
5377                 }
5378                 next PATCH if ($patch_line =~ m/^diff /);
5379                 #assert($patch_line =~ m/^---/) if DEBUG;
5380
5381                 my $last_patch_line = $patch_line;
5382                 $patch_line = <$fd>;
5383                 chomp $patch_line;
5384                 #assert($patch_line =~ m/^\+\+\+/) if DEBUG;
5385
5386                 print format_diff_from_to_header($last_patch_line, $patch_line,
5387                                                  $diffinfo, \%from, \%to,
5388                                                  @hash_parents);
5389
5390                 # the patch itself
5391         LINE:
5392                 while ($patch_line = <$fd>) {
5393                         chomp $patch_line;
5394
5395                         next PATCH if ($patch_line =~ m/^diff /);
5396
5397                         my $class = diff_line_class($patch_line, \%from, \%to);
5398
5399                         if ($class eq 'chunk_header') {
5400                                 print_diff_chunk($diff_style, scalar @hash_parents, \%from, \%to, @chunk);
5401                                 @chunk = ();
5402                         }
5403
5404                         push @chunk, [ $class, $patch_line ];
5405                 }
5406
5407         } continue {
5408                 if (@chunk) {
5409                         print_diff_chunk($diff_style, scalar @hash_parents, \%from, \%to, @chunk);
5410                         @chunk = ();
5411                 }
5412                 print "</div>\n"; # class="patch"
5413         }
5414
5415         # for compact combined (--cc) format, with chunk and patch simplification
5416         # the patchset might be empty, but there might be unprocessed raw lines
5417         for (++$patch_idx if $patch_number > 0;
5418              $patch_idx < @$difftree;
5419              ++$patch_idx) {
5420                 # read and prepare patch information
5421                 $diffinfo = parsed_difftree_line($difftree->[$patch_idx]);
5422
5423                 # generate anchor for "patch" links in difftree / whatchanged part
5424                 print "<div class=\"patch\" id=\"patch". ($patch_idx+1) ."\">\n" .
5425                       format_diff_cc_simplified($diffinfo, @hash_parents) .
5426                       "</div>\n";  # class="patch"
5427
5428                 $patch_number++;
5429         }
5430
5431         if ($patch_number == 0) {
5432                 if (@hash_parents > 1) {
5433                         print "<div class=\"diff nodifferences\">Trivial merge</div>\n";
5434                 } else {
5435                         print "<div class=\"diff nodifferences\">No differences found</div>\n";
5436                 }
5437         }
5438
5439         print "</div>\n"; # class="patchset"
5440 }
5441
5442 # . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
5443
5444 sub git_project_search_form {
5445         my ($searchtext, $search_use_regexp) = @_;
5446
5447         my $limit = '';
5448         if ($project_filter) {
5449                 $limit = " in '$project_filter/'";
5450         }
5451
5452         print "<div class=\"projsearch\">\n";
5453         print $cgi->startform(-method => 'get', -action => $my_uri) .
5454               $cgi->hidden(-name => 'a', -value => 'project_list')  . "\n";
5455         print $cgi->hidden(-name => 'pf', -value => $project_filter). "\n"
5456                 if (defined $project_filter);
5457         print $cgi->textfield(-name => 's', -value => $searchtext,
5458                               -title => "Search project by name and description$limit",
5459                               -size => 60) . "\n" .
5460               "<span title=\"Extended regular expression\">" .
5461               $cgi->checkbox(-name => 'sr', -value => 1, -label => 're',
5462                              -checked => $search_use_regexp) .
5463               "</span>\n" .
5464               $cgi->submit(-name => 'btnS', -value => 'Search') .
5465               $cgi->end_form() . "\n" .
5466               $cgi->a({-href => href(project => undef, searchtext => undef,
5467                                      project_filter => $project_filter)},
5468                       esc_html("List all projects$limit")) . "<br />\n";
5469         print "</div>\n";
5470 }
5471
5472 # entry for given @keys needs filling if at least one of keys in list
5473 # is not present in %$project_info
5474 sub project_info_needs_filling {
5475         my ($project_info, @keys) = @_;
5476
5477         # return List::MoreUtils::any { !exists $project_info->{$_} } @keys;
5478         foreach my $key (@keys) {
5479                 if (!exists $project_info->{$key}) {
5480                         return 1;
5481                 }
5482         }
5483         return;
5484 }
5485
5486 # fills project list info (age, description, owner, category, forks, etc.)
5487 # for each project in the list, removing invalid projects from
5488 # returned list, or fill only specified info.
5489 #
5490 # Invalid projects are removed from the returned list if and only if you
5491 # ask 'age' or 'age_string' to be filled, because they are the only fields
5492 # that run unconditionally git command that requires repository, and
5493 # therefore do always check if project repository is invalid.
5494 #
5495 # USAGE:
5496 # * fill_project_list_info(\@project_list, 'descr_long', 'ctags')
5497 #   ensures that 'descr_long' and 'ctags' fields are filled
5498 # * @project_list = fill_project_list_info(\@project_list)
5499 #   ensures that all fields are filled (and invalid projects removed)
5500 #
5501 # NOTE: modifies $projlist, but does not remove entries from it
5502 sub fill_project_list_info {
5503         my ($projlist, @wanted_keys) = @_;
5504         my @projects;
5505         my $filter_set = sub { return @_; };
5506         if (@wanted_keys) {
5507                 my %wanted_keys = map { $_ => 1 } @wanted_keys;
5508                 $filter_set = sub { return grep { $wanted_keys{$_} } @_; };
5509         }
5510
5511         my $show_ctags = gitweb_check_feature('ctags');
5512  PROJECT:
5513         foreach my $pr (@$projlist) {
5514                 if (project_info_needs_filling($pr, $filter_set->('age', 'age_string'))) {
5515                         my (@activity) = git_get_last_activity($pr->{'path'});
5516                         unless (@activity) {
5517                                 next PROJECT;
5518                         }
5519                         ($pr->{'age'}, $pr->{'age_string'}) = @activity;
5520                 }
5521                 if (project_info_needs_filling($pr, $filter_set->('descr', 'descr_long'))) {
5522                         my $descr = git_get_project_description($pr->{'path'}) || "";
5523                         $descr = to_utf8($descr);
5524                         $pr->{'descr_long'} = $descr;
5525                         $pr->{'descr'} = chop_str($descr, $projects_list_description_width, 5);
5526                 }
5527                 if (project_info_needs_filling($pr, $filter_set->('owner'))) {
5528                         $pr->{'owner'} = git_get_project_owner("$pr->{'path'}") || "";
5529                 }
5530                 if ($show_ctags &&
5531                     project_info_needs_filling($pr, $filter_set->('ctags'))) {
5532                         $pr->{'ctags'} = git_get_project_ctags($pr->{'path'});
5533                 }
5534                 if ($projects_list_group_categories &&
5535                     project_info_needs_filling($pr, $filter_set->('category'))) {
5536                         my $cat = git_get_project_category($pr->{'path'}) ||
5537                                                            $project_list_default_category;
5538                         $pr->{'category'} = to_utf8($cat);
5539                 }
5540
5541                 push @projects, $pr;
5542         }
5543
5544         return @projects;
5545 }
5546
5547 sub sort_projects_list {
5548         my ($projlist, $order) = @_;
5549
5550         sub order_str {
5551                 my $key = shift;
5552                 return sub { $a->{$key} cmp $b->{$key} };
5553         }
5554
5555         sub order_num_then_undef {
5556                 my $key = shift;
5557                 return sub {
5558                         defined $a->{$key} ?
5559                                 (defined $b->{$key} ? $a->{$key} <=> $b->{$key} : -1) :
5560                                 (defined $b->{$key} ? 1 : 0)
5561                 };
5562         }
5563
5564         my %orderings = (
5565                 project => order_str('path'),
5566                 descr => order_str('descr_long'),
5567                 owner => order_str('owner'),
5568                 age => order_num_then_undef('age'),
5569         );
5570
5571         my $ordering = $orderings{$order};
5572         return defined $ordering ? sort $ordering @$projlist : @$projlist;
5573 }
5574
5575 # returns a hash of categories, containing the list of project
5576 # belonging to each category
5577 sub build_projlist_by_category {
5578         my ($projlist, $from, $to) = @_;
5579         my %categories;
5580
5581         $from = 0 unless defined $from;
5582         $to = $#$projlist if (!defined $to || $#$projlist < $to);
5583
5584         for (my $i = $from; $i <= $to; $i++) {
5585                 my $pr = $projlist->[$i];
5586                 push @{$categories{ $pr->{'category'} }}, $pr;
5587         }
5588
5589         return wantarray ? %categories : \%categories;
5590 }
5591
5592 # print 'sort by' <th> element, generating 'sort by $name' replay link
5593 # if that order is not selected
5594 sub print_sort_th {
5595         print format_sort_th(@_);
5596 }
5597
5598 sub format_sort_th {
5599         my ($name, $order, $header) = @_;
5600         my $sort_th = "";
5601         $header ||= ucfirst($name);
5602
5603         if ($order eq $name) {
5604                 $sort_th .= "<th>$header</th>\n";
5605         } else {
5606                 $sort_th .= "<th>" .
5607                             $cgi->a({-href => href(-replay=>1, order=>$name),
5608                                      -class => "header"}, $header) .
5609                             "</th>\n";
5610         }
5611
5612         return $sort_th;
5613 }
5614
5615 sub git_project_list_rows {
5616         my ($projlist, $from, $to, $check_forks) = @_;
5617
5618         $from = 0 unless defined $from;
5619         $to = $#$projlist if (!defined $to || $#$projlist < $to);
5620
5621         my $alternate = 1;
5622         for (my $i = $from; $i <= $to; $i++) {
5623                 my $pr = $projlist->[$i];
5624
5625                 if ($alternate) {
5626                         print "<tr class=\"dark\">\n";
5627                 } else {
5628                         print "<tr class=\"light\">\n";
5629                 }
5630                 $alternate ^= 1;
5631
5632                 if ($check_forks) {
5633                         print "<td>";
5634                         if ($pr->{'forks'}) {
5635                                 my $nforks = scalar @{$pr->{'forks'}};
5636                                 if ($nforks > 0) {
5637                                         print $cgi->a({-href => href(project=>$pr->{'path'}, action=>"forks"),
5638                                                        -title => "$nforks forks"}, "+");
5639                                 } else {
5640                                         print $cgi->span({-title => "$nforks forks"}, "+");
5641                                 }
5642                         }
5643                         print "</td>\n";
5644                 }
5645                 print "<td>" . $cgi->a({-href => href(project=>$pr->{'path'}, action=>"summary"),
5646                                         -class => "list"},
5647                                        esc_html_match_hl($pr->{'path'}, $search_regexp)) .
5648                       "</td>\n" .
5649                       "<td>" . $cgi->a({-href => href(project=>$pr->{'path'}, action=>"summary"),
5650                                         -class => "list",
5651                                         -title => $pr->{'descr_long'}},
5652                                         $search_regexp
5653                                         ? esc_html_match_hl_chopped($pr->{'descr_long'},
5654                                                                     $pr->{'descr'}, $search_regexp)
5655                                         : esc_html($pr->{'descr'})) .
5656                       "</td>\n";
5657                 unless ($omit_owner) {
5658                         print "<td><i>" . chop_and_escape_str($pr->{'owner'}, 15) . "</i></td>\n";
5659                 }
5660                 unless ($omit_age_column) {
5661                         print "<td class=\"". age_class($pr->{'age'}) . "\">" .
5662                             (defined $pr->{'age_string'} ? $pr->{'age_string'} : "No commits") . "</td>\n";
5663                 }
5664                 print"<td class=\"link\">" .
5665                       $cgi->a({-href => href(project=>$pr->{'path'}, action=>"summary")}, "summary")   . " | " .
5666                       $cgi->a({-href => href(project=>$pr->{'path'}, action=>"shortlog")}, "shortlog") . " | " .
5667                       $cgi->a({-href => href(project=>$pr->{'path'}, action=>"log")}, "log") . " | " .
5668                       $cgi->a({-href => href(project=>$pr->{'path'}, action=>"tree")}, "tree") .
5669                       ($pr->{'forks'} ? " | " . $cgi->a({-href => href(project=>$pr->{'path'}, action=>"forks")}, "forks") : '') .
5670                       "</td>\n" .
5671                       "</tr>\n";
5672         }
5673 }
5674
5675 sub git_project_list_body {
5676         # actually uses global variable $project
5677         my ($projlist, $order, $from, $to, $extra, $no_header) = @_;
5678         my @projects = @$projlist;
5679
5680         my $check_forks = gitweb_check_feature('forks');
5681         my $show_ctags  = gitweb_check_feature('ctags');
5682         my $tagfilter = $show_ctags ? $input_params{'ctag'} : undef;
5683         $check_forks = undef
5684                 if ($tagfilter || $search_regexp);
5685
5686         # filtering out forks before filling info allows to do less work
5687         @projects = filter_forks_from_projects_list(\@projects)
5688                 if ($check_forks);
5689         # search_projects_list pre-fills required info
5690         @projects = search_projects_list(\@projects,
5691                                          'search_regexp' => $search_regexp,
5692                                          'tagfilter'  => $tagfilter)
5693                 if ($tagfilter || $search_regexp);
5694         # fill the rest
5695         my @all_fields = ('descr', 'descr_long', 'ctags', 'category');
5696         push @all_fields, ('age', 'age_string') unless($omit_age_column);
5697         push @all_fields, 'owner' unless($omit_owner);
5698         @projects = fill_project_list_info(\@projects, @all_fields);
5699
5700         $order ||= $default_projects_order;
5701         $from = 0 unless defined $from;
5702         $to = $#projects if (!defined $to || $#projects < $to);
5703
5704         # short circuit
5705         if ($from > $to) {
5706                 print "<center>\n".
5707                       "<b>No such projects found</b><br />\n".
5708                       "Click ".$cgi->a({-href=>href(project=>undef)},"here")." to view all projects<br />\n".
5709                       "</center>\n<br />\n";
5710                 return;
5711         }
5712
5713         @projects = sort_projects_list(\@projects, $order);
5714
5715         if ($show_ctags) {
5716                 my $ctags = git_gather_all_ctags(\@projects);
5717                 my $cloud = git_populate_project_tagcloud($ctags);
5718                 print git_show_project_tagcloud($cloud, 64);
5719         }
5720
5721         print "<table class=\"project_list\">\n";
5722         unless ($no_header) {
5723                 print "<tr>\n";
5724                 if ($check_forks) {
5725                         print "<th></th>\n";
5726                 }
5727                 print_sort_th('project', $order, 'Project');
5728                 print_sort_th('descr', $order, 'Description');
5729                 print_sort_th('owner', $order, 'Owner') unless $omit_owner;
5730                 print_sort_th('age', $order, 'Last Change') unless $omit_age_column;
5731                 print "<th></th>\n" . # for links
5732                       "</tr>\n";
5733         }
5734
5735         if ($projects_list_group_categories) {
5736                 # only display categories with projects in the $from-$to window
5737                 @projects = sort {$a->{'category'} cmp $b->{'category'}} @projects[$from..$to];
5738                 my %categories = build_projlist_by_category(\@projects, $from, $to);
5739                 foreach my $cat (sort keys %categories) {
5740                         unless ($cat eq "") {
5741                                 print "<tr>\n";
5742                                 if ($check_forks) {
5743                                         print "<td></td>\n";
5744                                 }
5745                                 print "<td class=\"category\" colspan=\"5\">".esc_html($cat)."</td>\n";
5746                                 print "</tr>\n";
5747                         }
5748
5749                         git_project_list_rows($categories{$cat}, undef, undef, $check_forks);
5750                 }
5751         } else {
5752                 git_project_list_rows(\@projects, $from, $to, $check_forks);
5753         }
5754
5755         if (defined $extra) {
5756                 print "<tr>\n";
5757                 if ($check_forks) {
5758                         print "<td></td>\n";
5759                 }
5760                 print "<td colspan=\"5\">$extra</td>\n" .
5761                       "</tr>\n";
5762         }
5763         print "</table>\n";
5764 }
5765
5766 sub git_log_body {
5767         # uses global variable $project
5768         my ($commitlist, $from, $to, $refs, $extra) = @_;
5769
5770         $from = 0 unless defined $from;
5771         $to = $#{$commitlist} if (!defined $to || $#{$commitlist} < $to);
5772
5773         for (my $i = 0; $i <= $to; $i++) {
5774                 my %co = %{$commitlist->[$i]};
5775                 next if !%co;
5776                 my $commit = $co{'id'};
5777                 my $ref = format_ref_marker($refs, $commit);
5778                 git_print_header_div('commit',
5779                                "<span class=\"age\">$co{'age_string'}</span>" .
5780                                esc_html($co{'title'}) . $ref,
5781                                $commit);
5782                 print "<div class=\"title_text\">\n" .
5783                       "<div class=\"log_link\">\n" .
5784                       $cgi->a({-href => href(action=>"commit", hash=>$commit)}, "commit") .
5785                       " | " .
5786                       $cgi->a({-href => href(action=>"commitdiff", hash=>$commit)}, "commitdiff") .
5787                       " | " .
5788                       $cgi->a({-href => href(action=>"tree", hash=>$commit, hash_base=>$commit)}, "tree") .
5789                       "<br/>\n" .
5790                       "</div>\n";
5791                       git_print_authorship(\%co, -tag => 'span');
5792                       print "<br/>\n</div>\n";
5793
5794                 print "<div class=\"log_body\">\n";
5795                 git_print_log($co{'comment'}, -final_empty_line=> 1);
5796                 print "</div>\n";
5797         }
5798         if ($extra) {
5799                 print "<div class=\"page_nav\">\n";
5800                 print "$extra\n";
5801                 print "</div>\n";
5802         }
5803 }
5804
5805 sub git_shortlog_body {
5806         # uses global variable $project
5807         my ($commitlist, $from, $to, $refs, $extra) = @_;
5808
5809         $from = 0 unless defined $from;
5810         $to = $#{$commitlist} if (!defined $to || $#{$commitlist} < $to);
5811
5812         print "<table class=\"shortlog\">\n";
5813         my $alternate = 1;
5814         for (my $i = $from; $i <= $to; $i++) {
5815                 my %co = %{$commitlist->[$i]};
5816                 my $commit = $co{'id'};
5817                 my $ref = format_ref_marker($refs, $commit);
5818                 if ($alternate) {
5819                         print "<tr class=\"dark\">\n";
5820                 } else {
5821                         print "<tr class=\"light\">\n";
5822                 }
5823                 $alternate ^= 1;
5824                 # git_summary() used print "<td><i>$co{'age_string'}</i></td>\n" .
5825                 print "<td title=\"$co{'age_string_age'}\"><i>$co{'age_string_date'}</i></td>\n" .
5826                       format_author_html('td', \%co, 10) . "<td>";
5827                 print format_subject_html($co{'title'}, $co{'title_short'},
5828                                           href(action=>"commit", hash=>$commit), $ref);
5829                 print "</td>\n" .
5830                       "<td class=\"link\">" .
5831                       $cgi->a({-href => href(action=>"commit", hash=>$commit)}, "commit") . " | " .
5832                       $cgi->a({-href => href(action=>"commitdiff", hash=>$commit)}, "commitdiff") . " | " .
5833                       $cgi->a({-href => href(action=>"tree", hash=>$commit, hash_base=>$commit)}, "tree");
5834                 my $snapshot_links = format_snapshot_links($commit);
5835                 if (defined $snapshot_links) {
5836                         print " | " . $snapshot_links;
5837                 }
5838                 print "</td>\n" .
5839                       "</tr>\n";
5840         }
5841         if (defined $extra) {
5842                 print "<tr>\n" .
5843                       "<td colspan=\"4\">$extra</td>\n" .
5844                       "</tr>\n";
5845         }
5846         print "</table>\n";
5847 }
5848
5849 sub git_history_body {
5850         # Warning: assumes constant type (blob or tree) during history
5851         my ($commitlist, $from, $to, $refs, $extra,
5852             $file_name, $file_hash, $ftype) = @_;
5853
5854         $from = 0 unless defined $from;
5855         $to = $#{$commitlist} unless (defined $to && $to <= $#{$commitlist});
5856
5857         print "<table class=\"history\">\n";
5858         my $alternate = 1;
5859         for (my $i = $from; $i <= $to; $i++) {
5860                 my %co = %{$commitlist->[$i]};
5861                 if (!%co) {
5862                         next;
5863                 }
5864                 my $commit = $co{'id'};
5865
5866                 my $ref = format_ref_marker($refs, $commit);
5867
5868                 if ($alternate) {
5869                         print "<tr class=\"dark\">\n";
5870                 } else {
5871                         print "<tr class=\"light\">\n";
5872                 }
5873                 $alternate ^= 1;
5874                 print "<td title=\"$co{'age_string_age'}\"><i>$co{'age_string_date'}</i></td>\n" .
5875         # shortlog:   format_author_html('td', \%co, 10)
5876                       format_author_html('td', \%co, 15, 3) . "<td>";
5877                 # originally git_history used chop_str($co{'title'}, 50)
5878                 print format_subject_html($co{'title'}, $co{'title_short'},
5879                                           href(action=>"commit", hash=>$commit), $ref);
5880                 print "</td>\n" .
5881                       "<td class=\"link\">" .
5882                       $cgi->a({-href => href(action=>$ftype, hash_base=>$commit, file_name=>$file_name)}, $ftype) . " | " .
5883                       $cgi->a({-href => href(action=>"commitdiff", hash=>$commit)}, "commitdiff");
5884
5885                 if ($ftype eq 'blob') {
5886                         my $blob_current = $file_hash;
5887                         my $blob_parent  = git_get_hash_by_path($commit, $file_name);
5888                         if (defined $blob_current && defined $blob_parent &&
5889                                         $blob_current ne $blob_parent) {
5890                                 print " | " .
5891                                         $cgi->a({-href => href(action=>"blobdiff",
5892                                                                hash=>$blob_current, hash_parent=>$blob_parent,
5893                                                                hash_base=>$hash_base, hash_parent_base=>$commit,
5894                                                                file_name=>$file_name)},
5895                                                 "diff to current");
5896                         }
5897                 }
5898                 print "</td>\n" .
5899                       "</tr>\n";
5900         }
5901         if (defined $extra) {
5902                 print "<tr>\n" .
5903                       "<td colspan=\"4\">$extra</td>\n" .
5904                       "</tr>\n";
5905         }
5906         print "</table>\n";
5907 }
5908
5909 sub git_tags_body {
5910         # uses global variable $project
5911         my ($taglist, $from, $to, $extra) = @_;
5912         $from = 0 unless defined $from;
5913         $to = $#{$taglist} if (!defined $to || $#{$taglist} < $to);
5914
5915         print "<table class=\"tags\">\n";
5916         my $alternate = 1;
5917         for (my $i = $from; $i <= $to; $i++) {
5918                 my $entry = $taglist->[$i];
5919                 my %tag = %$entry;
5920                 my $comment = $tag{'subject'};
5921                 my $comment_short;
5922                 if (defined $comment) {
5923                         $comment_short = chop_str($comment, 30, 5);
5924                 }
5925                 if ($alternate) {
5926                         print "<tr class=\"dark\">\n";
5927                 } else {
5928                         print "<tr class=\"light\">\n";
5929                 }
5930                 $alternate ^= 1;
5931                 if (defined $tag{'age'}) {
5932                         print "<td><i>$tag{'age'}</i></td>\n";
5933                 } else {
5934                         print "<td></td>\n";
5935                 }
5936                 print "<td>" .
5937                       $cgi->a({-href => href(action=>$tag{'reftype'}, hash=>$tag{'refid'}),
5938                                -class => "list name"}, esc_html($tag{'name'})) .
5939                       "</td>\n" .
5940                       "<td>";
5941                 if (defined $comment) {
5942                         print format_subject_html($comment, $comment_short,
5943                                                   href(action=>"tag", hash=>$tag{'id'}));
5944                 }
5945                 print "</td>\n" .
5946                       "<td class=\"selflink\">";
5947                 if ($tag{'type'} eq "tag") {
5948                         print $cgi->a({-href => href(action=>"tag", hash=>$tag{'id'})}, "tag");
5949                 } else {
5950                         print "&nbsp;";
5951                 }
5952                 print "</td>\n" .
5953                       "<td class=\"link\">" . " | " .
5954                       $cgi->a({-href => href(action=>$tag{'reftype'}, hash=>$tag{'refid'})}, $tag{'reftype'});
5955                 if ($tag{'reftype'} eq "commit") {
5956                         print " | " . $cgi->a({-href => href(action=>"shortlog", hash=>$tag{'fullname'})}, "shortlog") .
5957                               " | " . $cgi->a({-href => href(action=>"log", hash=>$tag{'fullname'})}, "log");
5958                 } elsif ($tag{'reftype'} eq "blob") {
5959                         print " | " . $cgi->a({-href => href(action=>"blob_plain", hash=>$tag{'refid'})}, "raw");
5960                 }
5961                 print "</td>\n" .
5962                       "</tr>";
5963         }
5964         if (defined $extra) {
5965                 print "<tr>\n" .
5966                       "<td colspan=\"5\">$extra</td>\n" .
5967                       "</tr>\n";
5968         }
5969         print "</table>\n";
5970 }
5971
5972 sub git_heads_body {
5973         # uses global variable $project
5974         my ($headlist, $head_at, $from, $to, $extra) = @_;
5975         $from = 0 unless defined $from;
5976         $to = $#{$headlist} if (!defined $to || $#{$headlist} < $to);
5977
5978         print "<table class=\"heads\">\n";
5979         my $alternate = 1;
5980         for (my $i = $from; $i <= $to; $i++) {
5981                 my $entry = $headlist->[$i];
5982                 my %ref = %$entry;
5983                 my $curr = defined $head_at && $ref{'id'} eq $head_at;
5984                 if ($alternate) {
5985                         print "<tr class=\"dark\">\n";
5986                 } else {
5987                         print "<tr class=\"light\">\n";
5988                 }
5989                 $alternate ^= 1;
5990                 print "<td><i>$ref{'age'}</i></td>\n" .
5991                       ($curr ? "<td class=\"current_head\">" : "<td>") .
5992                       $cgi->a({-href => href(action=>"shortlog", hash=>$ref{'fullname'}),
5993                                -class => "list name"},esc_html($ref{'name'})) .
5994                       "</td>\n" .
5995                       "<td class=\"link\">" .
5996                       $cgi->a({-href => href(action=>"shortlog", hash=>$ref{'fullname'})}, "shortlog") . " | " .
5997                       $cgi->a({-href => href(action=>"log", hash=>$ref{'fullname'})}, "log") . " | " .
5998                       $cgi->a({-href => href(action=>"tree", hash=>$ref{'fullname'}, hash_base=>$ref{'fullname'})}, "tree") .
5999                       "</td>\n" .
6000                       "</tr>";
6001         }
6002         if (defined $extra) {
6003                 print "<tr>\n" .
6004                       "<td colspan=\"3\">$extra</td>\n" .
6005                       "</tr>\n";
6006         }
6007         print "</table>\n";
6008 }
6009
6010 # Display a single remote block
6011 sub git_remote_block {
6012         my ($remote, $rdata, $limit, $head) = @_;
6013
6014         my $heads = $rdata->{'heads'};
6015         my $fetch = $rdata->{'fetch'};
6016         my $push = $rdata->{'push'};
6017
6018         my $urls_table = "<table class=\"projects_list\">\n" ;
6019
6020         if (defined $fetch) {
6021                 if ($fetch eq $push) {
6022                         $urls_table .= format_repo_url("URL", $fetch);
6023                 } else {
6024                         $urls_table .= format_repo_url("Fetch URL", $fetch);
6025                         $urls_table .= format_repo_url("Push URL", $push) if defined $push;
6026                 }
6027         } elsif (defined $push) {
6028                 $urls_table .= format_repo_url("Push URL", $push);
6029         } else {
6030                 $urls_table .= format_repo_url("", "No remote URL");
6031         }
6032
6033         $urls_table .= "</table>\n";
6034
6035         my $dots;
6036         if (defined $limit && $limit < @$heads) {
6037                 $dots = $cgi->a({-href => href(action=>"remotes", hash=>$remote)}, "...");
6038         }
6039
6040         print $urls_table;
6041         git_heads_body($heads, $head, 0, $limit, $dots);
6042 }
6043
6044 # Display a list of remote names with the respective fetch and push URLs
6045 sub git_remotes_list {
6046         my ($remotedata, $limit) = @_;
6047         print "<table class=\"heads\">\n";
6048         my $alternate = 1;
6049         my @remotes = sort keys %$remotedata;
6050
6051         my $limited = $limit && $limit < @remotes;
6052
6053         $#remotes = $limit - 1 if $limited;
6054
6055         while (my $remote = shift @remotes) {
6056                 my $rdata = $remotedata->{$remote};
6057                 my $fetch = $rdata->{'fetch'};
6058                 my $push = $rdata->{'push'};
6059                 if ($alternate) {
6060                         print "<tr class=\"dark\">\n";
6061                 } else {
6062                         print "<tr class=\"light\">\n";
6063                 }
6064                 $alternate ^= 1;
6065                 print "<td>" .
6066                       $cgi->a({-href=> href(action=>'remotes', hash=>$remote),
6067                                -class=> "list name"},esc_html($remote)) .
6068                       "</td>";
6069                 print "<td class=\"link\">" .
6070                       (defined $fetch ? $cgi->a({-href=> $fetch}, "fetch") : "fetch") .
6071                       " | " .
6072                       (defined $push ? $cgi->a({-href=> $push}, "push") : "push") .
6073                       "</td>";
6074
6075                 print "</tr>\n";
6076         }
6077
6078         if ($limited) {
6079                 print "<tr>\n" .
6080                       "<td colspan=\"3\">" .
6081                       $cgi->a({-href => href(action=>"remotes")}, "...") .
6082                       "</td>\n" . "</tr>\n";
6083         }
6084
6085         print "</table>";
6086 }
6087
6088 # Display remote heads grouped by remote, unless there are too many
6089 # remotes, in which case we only display the remote names
6090 sub git_remotes_body {
6091         my ($remotedata, $limit, $head) = @_;
6092         if ($limit and $limit < keys %$remotedata) {
6093                 git_remotes_list($remotedata, $limit);
6094         } else {
6095                 fill_remote_heads($remotedata);
6096                 while (my ($remote, $rdata) = each %$remotedata) {
6097                         git_print_section({-class=>"remote", -id=>$remote},
6098                                 ["remotes", $remote, $remote], sub {
6099                                         git_remote_block($remote, $rdata, $limit, $head);
6100                                 });
6101                 }
6102         }
6103 }
6104
6105 sub git_search_message {
6106         my %co = @_;
6107
6108         my $greptype;
6109         if ($searchtype eq 'commit') {
6110                 $greptype = "--grep=";
6111         } elsif ($searchtype eq 'author') {
6112                 $greptype = "--author=";
6113         } elsif ($searchtype eq 'committer') {
6114                 $greptype = "--committer=";
6115         }
6116         $greptype .= $searchtext;
6117         my @commitlist = parse_commits($hash, 101, (100 * $page), undef,
6118                                        $greptype, '--regexp-ignore-case',
6119                                        $search_use_regexp ? '--extended-regexp' : '--fixed-strings');
6120
6121         my $paging_nav = '';
6122         if ($page > 0) {
6123                 $paging_nav .=
6124                         $cgi->a({-href => href(-replay=>1, page=>undef)},
6125                                 "first") .
6126                         " &sdot; " .
6127                         $cgi->a({-href => href(-replay=>1, page=>$page-1),
6128                                  -accesskey => "p", -title => "Alt-p"}, "prev");
6129         } else {
6130                 $paging_nav .= "first &sdot; prev";
6131         }
6132         my $next_link = '';
6133         if ($#commitlist >= 100) {
6134                 $next_link =
6135                         $cgi->a({-href => href(-replay=>1, page=>$page+1),
6136                                  -accesskey => "n", -title => "Alt-n"}, "next");
6137                 $paging_nav .= " &sdot; $next_link";
6138         } else {
6139                 $paging_nav .= " &sdot; next";
6140         }
6141
6142         git_header_html();
6143
6144         git_print_page_nav('','', $hash,$co{'tree'},$hash, $paging_nav);
6145         git_print_header_div('commit', esc_html($co{'title'}), $hash);
6146         if ($page == 0 && !@commitlist) {
6147                 print "<p>No match.</p>\n";
6148         } else {
6149                 git_search_grep_body(\@commitlist, 0, 99, $next_link);
6150         }
6151
6152         git_footer_html();
6153 }
6154
6155 sub git_search_changes {
6156         my %co = @_;
6157
6158         local $/ = "\n";
6159         open my $fd, '-|', git_cmd(), '--no-pager', 'log', @diff_opts,
6160                 '--pretty=format:%H', '--no-abbrev', '--raw', "-S$searchtext",
6161                 ($search_use_regexp ? '--pickaxe-regex' : ())
6162                         or die_error(500, "Open git-log failed");
6163
6164         git_header_html();
6165
6166         git_print_page_nav('','', $hash,$co{'tree'},$hash);
6167         git_print_header_div('commit', esc_html($co{'title'}), $hash);
6168
6169         print "<table class=\"pickaxe search\">\n";
6170         my $alternate = 1;
6171         undef %co;
6172         my @files;
6173         while (my $line = <$fd>) {
6174                 chomp $line;
6175                 next unless $line;
6176
6177                 my %set = parse_difftree_raw_line($line);
6178                 if (defined $set{'commit'}) {
6179                         # finish previous commit
6180                         if (%co) {
6181                                 print "</td>\n" .
6182                                       "<td class=\"link\">" .
6183                                       $cgi->a({-href => href(action=>"commit", hash=>$co{'id'})},
6184                                               "commit") .
6185                                       " | " .
6186                                       $cgi->a({-href => href(action=>"tree", hash=>$co{'tree'},
6187                                                              hash_base=>$co{'id'})},
6188                                               "tree") .
6189                                       "</td>\n" .
6190                                       "</tr>\n";
6191                         }
6192
6193                         if ($alternate) {
6194                                 print "<tr class=\"dark\">\n";
6195                         } else {
6196                                 print "<tr class=\"light\">\n";
6197                         }
6198                         $alternate ^= 1;
6199                         %co = parse_commit($set{'commit'});
6200                         my $author = chop_and_escape_str($co{'author_name'}, 15, 5);
6201                         print "<td title=\"$co{'age_string_age'}\"><i>$co{'age_string_date'}</i></td>\n" .
6202                               "<td><i>$author</i></td>\n" .
6203                               "<td>" .
6204                               $cgi->a({-href => href(action=>"commit", hash=>$co{'id'}),
6205                                       -class => "list subject"},
6206                                       chop_and_escape_str($co{'title'}, 50) . "<br/>");
6207                 } elsif (defined $set{'to_id'}) {
6208                         next if ($set{'to_id'} =~ m/^0{40}$/);
6209
6210                         print $cgi->a({-href => href(action=>"blob", hash_base=>$co{'id'},
6211                                                      hash=>$set{'to_id'}, file_name=>$set{'to_file'}),
6212                                       -class => "list"},
6213                                       "<span class=\"match\">" . esc_path($set{'file'}) . "</span>") .
6214                               "<br/>\n";
6215                 }
6216         }
6217         close $fd;
6218
6219         # finish last commit (warning: repetition!)
6220         if (%co) {
6221                 print "</td>\n" .
6222                       "<td class=\"link\">" .
6223                       $cgi->a({-href => href(action=>"commit", hash=>$co{'id'})},
6224                               "commit") .
6225                       " | " .
6226                       $cgi->a({-href => href(action=>"tree", hash=>$co{'tree'},
6227                                              hash_base=>$co{'id'})},
6228                               "tree") .
6229                       "</td>\n" .
6230                       "</tr>\n";
6231         }
6232
6233         print "</table>\n";
6234
6235         git_footer_html();
6236 }
6237
6238 sub git_search_files {
6239         my %co = @_;
6240
6241         local $/ = "\n";
6242         open my $fd, "-|", git_cmd(), 'grep', '-n', '-z',
6243                 $search_use_regexp ? ('-E', '-i') : '-F',
6244                 $searchtext, $co{'tree'}
6245                         or die_error(500, "Open git-grep failed");
6246
6247         git_header_html();
6248
6249         git_print_page_nav('','', $hash,$co{'tree'},$hash);
6250         git_print_header_div('commit', esc_html($co{'title'}), $hash);
6251
6252         print "<table class=\"grep_search\">\n";
6253         my $alternate = 1;
6254         my $matches = 0;
6255         my $lastfile = '';
6256         my $file_href;
6257         while (my $line = <$fd>) {
6258                 chomp $line;
6259                 my ($file, $lno, $ltext, $binary);
6260                 last if ($matches++ > 1000);
6261                 if ($line =~ /^Binary file (.+) matches$/) {
6262                         $file = $1;
6263                         $binary = 1;
6264                 } else {
6265                         ($file, $lno, $ltext) = split(/\0/, $line, 3);
6266                         $file =~ s/^$co{'tree'}://;
6267                 }
6268                 if ($file ne $lastfile) {
6269                         $lastfile and print "</td></tr>\n";
6270                         if ($alternate++) {
6271                                 print "<tr class=\"dark\">\n";
6272                         } else {
6273                                 print "<tr class=\"light\">\n";
6274                         }
6275                         $file_href = href(action=>"blob", hash_base=>$co{'id'},
6276                                           file_name=>$file);
6277                         print "<td class=\"list\">".
6278                                 $cgi->a({-href => $file_href, -class => "list"}, esc_path($file));
6279                         print "</td><td>\n";
6280                         $lastfile = $file;
6281                 }
6282                 if ($binary) {
6283                         print "<div class=\"binary\">Binary file</div>\n";
6284                 } else {
6285                         $ltext = untabify($ltext);
6286                         if ($ltext =~ m/^(.*)($search_regexp)(.*)$/i) {
6287                                 $ltext = esc_html($1, -nbsp=>1);
6288                                 $ltext .= '<span class="match">';
6289                                 $ltext .= esc_html($2, -nbsp=>1);
6290                                 $ltext .= '</span>';
6291                                 $ltext .= esc_html($3, -nbsp=>1);
6292                         } else {
6293                                 $ltext = esc_html($ltext, -nbsp=>1);
6294                         }
6295                         print "<div class=\"pre\">" .
6296                                 $cgi->a({-href => $file_href.'#l'.$lno,
6297                                         -class => "linenr"}, sprintf('%4i', $lno)) .
6298                                 ' ' .  $ltext . "</div>\n";
6299                 }
6300         }
6301         if ($lastfile) {
6302                 print "</td></tr>\n";
6303                 if ($matches > 1000) {
6304                         print "<div class=\"diff nodifferences\">Too many matches, listing trimmed</div>\n";
6305                 }
6306         } else {
6307                 print "<div class=\"diff nodifferences\">No matches found</div>\n";
6308         }
6309         close $fd;
6310
6311         print "</table>\n";
6312
6313         git_footer_html();
6314 }
6315
6316 sub git_search_grep_body {
6317         my ($commitlist, $from, $to, $extra) = @_;
6318         $from = 0 unless defined $from;
6319         $to = $#{$commitlist} if (!defined $to || $#{$commitlist} < $to);
6320
6321         print "<table class=\"commit_search\">\n";
6322         my $alternate = 1;
6323         for (my $i = $from; $i <= $to; $i++) {
6324                 my %co = %{$commitlist->[$i]};
6325                 if (!%co) {
6326                         next;
6327                 }
6328                 my $commit = $co{'id'};
6329                 if ($alternate) {
6330                         print "<tr class=\"dark\">\n";
6331                 } else {
6332                         print "<tr class=\"light\">\n";
6333                 }
6334                 $alternate ^= 1;
6335                 print "<td title=\"$co{'age_string_age'}\"><i>$co{'age_string_date'}</i></td>\n" .
6336                       format_author_html('td', \%co, 15, 5) .
6337                       "<td>" .
6338                       $cgi->a({-href => href(action=>"commit", hash=>$co{'id'}),
6339                                -class => "list subject"},
6340                               chop_and_escape_str($co{'title'}, 50) . "<br/>");
6341                 my $comment = $co{'comment'};
6342                 foreach my $line (@$comment) {
6343                         if ($line =~ m/^(.*?)($search_regexp)(.*)$/i) {
6344                                 my ($lead, $match, $trail) = ($1, $2, $3);
6345                                 $match = chop_str($match, 70, 5, 'center');
6346                                 my $contextlen = int((80 - length($match))/2);
6347                                 $contextlen = 30 if ($contextlen > 30);
6348                                 $lead  = chop_str($lead,  $contextlen, 10, 'left');
6349                                 $trail = chop_str($trail, $contextlen, 10, 'right');
6350
6351                                 $lead  = esc_html($lead);
6352                                 $match = esc_html($match);
6353                                 $trail = esc_html($trail);
6354
6355                                 print "$lead<span class=\"match\">$match</span>$trail<br />";
6356                         }
6357                 }
6358                 print "</td>\n" .
6359                       "<td class=\"link\">" .
6360                       $cgi->a({-href => href(action=>"commit", hash=>$co{'id'})}, "commit") .
6361                       " | " .
6362                       $cgi->a({-href => href(action=>"commitdiff", hash=>$co{'id'})}, "commitdiff") .
6363                       " | " .
6364                       $cgi->a({-href => href(action=>"tree", hash=>$co{'tree'}, hash_base=>$co{'id'})}, "tree");
6365                 print "</td>\n" .
6366                       "</tr>\n";
6367         }
6368         if (defined $extra) {
6369                 print "<tr>\n" .
6370                       "<td colspan=\"3\">$extra</td>\n" .
6371                       "</tr>\n";
6372         }
6373         print "</table>\n";
6374 }
6375
6376 ## ======================================================================
6377 ## ======================================================================
6378 ## actions
6379
6380 sub git_project_list {
6381         my $order = $input_params{'order'};
6382         if (defined $order && $order !~ m/none|project|descr|owner|age/) {
6383                 die_error(400, "Unknown order parameter");
6384         }
6385
6386         my @list = git_get_projects_list($project_filter, $strict_export);
6387         if (!@list) {
6388                 die_error(404, "No projects found");
6389         }
6390
6391         git_header_html();
6392         if (defined $home_text && -f $home_text) {
6393                 print "<div class=\"index_include\">\n";
6394                 insert_file($home_text);
6395                 print "</div>\n";
6396         }
6397
6398         git_project_search_form($searchtext, $search_use_regexp);
6399         git_project_list_body(\@list, $order);
6400         git_footer_html();
6401 }
6402
6403 sub git_forks {
6404         my $order = $input_params{'order'};
6405         if (defined $order && $order !~ m/none|project|descr|owner|age/) {
6406                 die_error(400, "Unknown order parameter");
6407         }
6408
6409         my $filter = $project;
6410         $filter =~ s/\.git$//;
6411         my @list = git_get_projects_list($filter);
6412         if (!@list) {
6413                 die_error(404, "No forks found");
6414         }
6415
6416         git_header_html();
6417         git_print_page_nav('','');
6418         git_print_header_div('summary', "$project forks");
6419         git_project_list_body(\@list, $order);
6420         git_footer_html();
6421 }
6422
6423 sub git_project_index {
6424         my @projects = git_get_projects_list($project_filter, $strict_export);
6425         if (!@projects) {
6426                 die_error(404, "No projects found");
6427         }
6428
6429         print $cgi->header(
6430                 -type => 'text/plain',
6431                 -charset => 'utf-8',
6432                 -content_disposition => 'inline; filename="index.aux"');
6433
6434         foreach my $pr (@projects) {
6435                 if (!exists $pr->{'owner'}) {
6436                         $pr->{'owner'} = git_get_project_owner("$pr->{'path'}");
6437                 }
6438
6439                 my ($path, $owner) = ($pr->{'path'}, $pr->{'owner'});
6440                 # quote as in CGI::Util::encode, but keep the slash, and use '+' for ' '
6441                 $path  =~ s/([^a-zA-Z0-9_.\-\/ ])/sprintf("%%%02X", ord($1))/eg;
6442                 $owner =~ s/([^a-zA-Z0-9_.\-\/ ])/sprintf("%%%02X", ord($1))/eg;
6443                 $path  =~ s/ /\+/g;
6444                 $owner =~ s/ /\+/g;
6445
6446                 print "$path $owner\n";
6447         }
6448 }
6449
6450 sub git_summary {
6451         my $descr = git_get_project_description($project) || "none";
6452         my %co = parse_commit("HEAD");
6453         my %cd = %co ? parse_date($co{'committer_epoch'}, $co{'committer_tz'}) : ();
6454         my $head = $co{'id'};
6455         my $remote_heads = gitweb_check_feature('remote_heads');
6456
6457         my $owner = git_get_project_owner($project);
6458
6459         my $refs = git_get_references();
6460         # These get_*_list functions return one more to allow us to see if
6461         # there are more ...
6462         my @taglist  = git_get_tags_list(16);
6463         my @headlist = git_get_heads_list(16);
6464         my %remotedata = $remote_heads ? git_get_remotes_list() : ();
6465         my @forklist;
6466         my $check_forks = gitweb_check_feature('forks');
6467
6468         if ($check_forks) {
6469                 # find forks of a project
6470                 my $filter = $project;
6471                 $filter =~ s/\.git$//;
6472                 @forklist = git_get_projects_list($filter);
6473                 # filter out forks of forks
6474                 @forklist = filter_forks_from_projects_list(\@forklist)
6475                         if (@forklist);
6476         }
6477
6478         git_header_html();
6479         git_print_page_nav('summary','', $head);
6480
6481         print "<div class=\"title\">&nbsp;</div>\n";
6482         print "<table class=\"projects_list\">\n" .
6483               "<tr id=\"metadata_desc\"><td>description</td><td>" . esc_html($descr) . "</td></tr>\n";
6484         if ($owner and not $omit_owner) {
6485                 print  "<tr id=\"metadata_owner\"><td>owner</td><td>" . esc_html($owner) . "</td></tr>\n";
6486         }
6487         if (defined $cd{'rfc2822'}) {
6488                 print "<tr id=\"metadata_lchange\"><td>last change</td>" .
6489                       "<td>".format_timestamp_html(\%cd)."</td></tr>\n";
6490         }
6491
6492         # use per project git URL list in $projectroot/$project/cloneurl
6493         # or make project git URL from git base URL and project name
6494         my $url_tag = "URL";
6495         my @url_list = git_get_project_url_list($project);
6496         @url_list = map { "$_/$project" } @git_base_url_list unless @url_list;
6497         foreach my $git_url (@url_list) {
6498                 next unless $git_url;
6499                 print format_repo_url($url_tag, $git_url);
6500                 $url_tag = "";
6501         }
6502
6503         # Tag cloud
6504         my $show_ctags = gitweb_check_feature('ctags');
6505         if ($show_ctags) {
6506                 my $ctags = git_get_project_ctags($project);
6507                 if (%$ctags) {
6508                         # without ability to add tags, don't show if there are none
6509                         my $cloud = git_populate_project_tagcloud($ctags);
6510                         print "<tr id=\"metadata_ctags\">" .
6511                               "<td>content tags</td>" .
6512                               "<td>".git_show_project_tagcloud($cloud, 48)."</td>" .
6513                               "</tr>\n";
6514                 }
6515         }
6516
6517         print "</table>\n";
6518
6519         # If XSS prevention is on, we don't include README.html.
6520         # TODO: Allow a readme in some safe format.
6521         if (!$prevent_xss && -s "$projectroot/$project/README.html") {
6522                 print "<div class=\"title\">readme</div>\n" .
6523                       "<div class=\"readme\">\n";
6524                 insert_file("$projectroot/$project/README.html");
6525                 print "\n</div>\n"; # class="readme"
6526         }
6527
6528         # we need to request one more than 16 (0..15) to check if
6529         # those 16 are all
6530         my @commitlist = $head ? parse_commits($head, 17) : ();
6531         if (@commitlist) {
6532                 git_print_header_div('shortlog');
6533                 git_shortlog_body(\@commitlist, 0, 15, $refs,
6534                                   $#commitlist <=  15 ? undef :
6535                                   $cgi->a({-href => href(action=>"shortlog")}, "..."));
6536         }
6537
6538         if (@taglist) {
6539                 git_print_header_div('tags');
6540                 git_tags_body(\@taglist, 0, 15,
6541                               $#taglist <=  15 ? undef :
6542                               $cgi->a({-href => href(action=>"tags")}, "..."));
6543         }
6544
6545         if (@headlist) {
6546                 git_print_header_div('heads');
6547                 git_heads_body(\@headlist, $head, 0, 15,
6548                                $#headlist <= 15 ? undef :
6549                                $cgi->a({-href => href(action=>"heads")}, "..."));
6550         }
6551
6552         if (%remotedata) {
6553                 git_print_header_div('remotes');
6554                 git_remotes_body(\%remotedata, 15, $head);
6555         }
6556
6557         if (@forklist) {
6558                 git_print_header_div('forks');
6559                 git_project_list_body(\@forklist, 'age', 0, 15,
6560                                       $#forklist <= 15 ? undef :
6561                                       $cgi->a({-href => href(action=>"forks")}, "..."),
6562                                       'no_header');
6563         }
6564
6565         git_footer_html();
6566 }
6567
6568 sub git_tag {
6569         my %tag = parse_tag($hash);
6570
6571         if (! %tag) {
6572                 die_error(404, "Unknown tag object");
6573         }
6574
6575         my $head = git_get_head_hash($project);
6576         git_header_html();
6577         git_print_page_nav('','', $head,undef,$head);
6578         git_print_header_div('commit', esc_html($tag{'name'}), $hash);
6579         print "<div class=\"title_text\">\n" .
6580               "<table class=\"object_header\">\n" .
6581               "<tr>\n" .
6582               "<td>object</td>\n" .
6583               "<td>" . $cgi->a({-class => "list", -href => href(action=>$tag{'type'}, hash=>$tag{'object'})},
6584                                $tag{'object'}) . "</td>\n" .
6585               "<td class=\"link\">" . $cgi->a({-href => href(action=>$tag{'type'}, hash=>$tag{'object'})},
6586                                               $tag{'type'}) . "</td>\n" .
6587               "</tr>\n";
6588         if (defined($tag{'author'})) {
6589                 git_print_authorship_rows(\%tag, 'author');
6590         }
6591         print "</table>\n\n" .
6592               "</div>\n";
6593         print "<div class=\"page_body\">";
6594         my $comment = $tag{'comment'};
6595         foreach my $line (@$comment) {
6596                 chomp $line;
6597                 print esc_html($line, -nbsp=>1) . "<br/>\n";
6598         }
6599         print "</div>\n";
6600         git_footer_html();
6601 }
6602
6603 sub git_blame_common {
6604         my $format = shift || 'porcelain';
6605         if ($format eq 'porcelain' && $input_params{'javascript'}) {
6606                 $format = 'incremental';
6607                 $action = 'blame_incremental'; # for page title etc
6608         }
6609
6610         # permissions
6611         gitweb_check_feature('blame')
6612                 or die_error(403, "Blame view not allowed");
6613
6614         # error checking
6615         die_error(400, "No file name given") unless $file_name;
6616         $hash_base ||= git_get_head_hash($project);
6617         die_error(404, "Couldn't find base commit") unless $hash_base;
6618         my %co = parse_commit($hash_base)
6619                 or die_error(404, "Commit not found");
6620         my $ftype = "blob";
6621         if (!defined $hash) {
6622                 $hash = git_get_hash_by_path($hash_base, $file_name, "blob")
6623                         or die_error(404, "Error looking up file");
6624         } else {
6625                 $ftype = git_get_type($hash);
6626                 if ($ftype !~ "blob") {
6627                         die_error(400, "Object is not a blob");
6628                 }
6629         }
6630
6631         my $fd;
6632         if ($format eq 'incremental') {
6633                 # get file contents (as base)
6634                 open $fd, "-|", git_cmd(), 'cat-file', 'blob', $hash
6635                         or die_error(500, "Open git-cat-file failed");
6636         } elsif ($format eq 'data') {
6637                 # run git-blame --incremental
6638                 open $fd, "-|", git_cmd(), "blame", "--incremental",
6639                         $hash_base, "--", $file_name
6640                         or die_error(500, "Open git-blame --incremental failed");
6641         } else {
6642                 # run git-blame --porcelain
6643                 open $fd, "-|", git_cmd(), "blame", '-p',
6644                         $hash_base, '--', $file_name
6645                         or die_error(500, "Open git-blame --porcelain failed");
6646         }
6647         binmode $fd, ':utf8';
6648
6649         # incremental blame data returns early
6650         if ($format eq 'data') {
6651                 print $cgi->header(
6652                         -type=>"text/plain", -charset => "utf-8",
6653                         -status=> "200 OK");
6654                 local $| = 1; # output autoflush
6655                 while (my $line = <$fd>) {
6656                         print to_utf8($line);
6657                 }
6658                 close $fd
6659                         or print "ERROR $!\n";
6660
6661                 print 'END';
6662                 if (defined $t0 && gitweb_check_feature('timed')) {
6663                         print ' '.
6664                               tv_interval($t0, [ gettimeofday() ]).
6665                               ' '.$number_of_git_cmds;
6666                 }
6667                 print "\n";
6668
6669                 return;
6670         }
6671
6672         # page header
6673         git_header_html();
6674         my $formats_nav =
6675                 $cgi->a({-href => href(action=>"blob", -replay=>1)},
6676                         "blob") .
6677                 " | ";
6678         if ($format eq 'incremental') {
6679                 $formats_nav .=
6680                         $cgi->a({-href => href(action=>"blame", javascript=>0, -replay=>1)},
6681                                 "blame") . " (non-incremental)";
6682         } else {
6683                 $formats_nav .=
6684                         $cgi->a({-href => href(action=>"blame_incremental", -replay=>1)},
6685                                 "blame") . " (incremental)";
6686         }
6687         $formats_nav .=
6688                 " | " .
6689                 $cgi->a({-href => href(action=>"history", -replay=>1)},
6690                         "history") .
6691                 " | " .
6692                 $cgi->a({-href => href(action=>$action, file_name=>$file_name)},
6693                         "HEAD");
6694         git_print_page_nav('','', $hash_base,$co{'tree'},$hash_base, $formats_nav);
6695         git_print_header_div('commit', esc_html($co{'title'}), $hash_base);
6696         git_print_page_path($file_name, $ftype, $hash_base);
6697
6698         # page body
6699         if ($format eq 'incremental') {
6700                 print "<noscript>\n<div class=\"error\"><center><b>\n".
6701                       "This page requires JavaScript to run.\n Use ".
6702                       $cgi->a({-href => href(action=>'blame',javascript=>0,-replay=>1)},
6703                               'this page').
6704                       " instead.\n".
6705                       "</b></center></div>\n</noscript>\n";
6706
6707                 print qq!<div id="progress_bar" style="width: 100%; background-color: yellow"></div>\n!;
6708         }
6709
6710         print qq!<div class="page_body">\n!;
6711         print qq!<div id="progress_info">... / ...</div>\n!
6712                 if ($format eq 'incremental');
6713         print qq!<table id="blame_table" class="blame" width="100%">\n!.
6714               #qq!<col width="5.5em" /><col width="2.5em" /><col width="*" />\n!.
6715               qq!<thead>\n!.
6716               qq!<tr><th>Commit</th><th>Line</th><th>Data</th></tr>\n!.
6717               qq!</thead>\n!.
6718               qq!<tbody>\n!;
6719
6720         my @rev_color = qw(light dark);
6721         my $num_colors = scalar(@rev_color);
6722         my $current_color = 0;
6723
6724         if ($format eq 'incremental') {
6725                 my $color_class = $rev_color[$current_color];
6726
6727                 #contents of a file
6728                 my $linenr = 0;
6729         LINE:
6730                 while (my $line = <$fd>) {
6731                         chomp $line;
6732                         $linenr++;
6733
6734                         print qq!<tr id="l$linenr" class="$color_class">!.
6735                               qq!<td class="sha1"><a href=""> </a></td>!.
6736                               qq!<td class="linenr">!.
6737                               qq!<a class="linenr" href="">$linenr</a></td>!;
6738                         print qq!<td class="pre">! . esc_html($line) . "</td>\n";
6739                         print qq!</tr>\n!;
6740                 }
6741
6742         } else { # porcelain, i.e. ordinary blame
6743                 my %metainfo = (); # saves information about commits
6744
6745                 # blame data
6746         LINE:
6747                 while (my $line = <$fd>) {
6748                         chomp $line;
6749                         # the header: <SHA-1> <src lineno> <dst lineno> [<lines in group>]
6750                         # no <lines in group> for subsequent lines in group of lines
6751                         my ($full_rev, $orig_lineno, $lineno, $group_size) =
6752                            ($line =~ /^([0-9a-f]{40}) (\d+) (\d+)(?: (\d+))?$/);
6753                         if (!exists $metainfo{$full_rev}) {
6754                                 $metainfo{$full_rev} = { 'nprevious' => 0 };
6755                         }
6756                         my $meta = $metainfo{$full_rev};
6757                         my $data;
6758                         while ($data = <$fd>) {
6759                                 chomp $data;
6760                                 last if ($data =~ s/^\t//); # contents of line
6761                                 if ($data =~ /^(\S+)(?: (.*))?$/) {
6762                                         $meta->{$1} = $2 unless exists $meta->{$1};
6763                                 }
6764                                 if ($data =~ /^previous /) {
6765                                         $meta->{'nprevious'}++;
6766                                 }
6767                         }
6768                         my $short_rev = substr($full_rev, 0, 8);
6769                         my $author = $meta->{'author'};
6770                         my %date =
6771                                 parse_date($meta->{'author-time'}, $meta->{'author-tz'});
6772                         my $date = $date{'iso-tz'};
6773                         if ($group_size) {
6774                                 $current_color = ($current_color + 1) % $num_colors;
6775                         }
6776                         my $tr_class = $rev_color[$current_color];
6777                         $tr_class .= ' boundary' if (exists $meta->{'boundary'});
6778                         $tr_class .= ' no-previous' if ($meta->{'nprevious'} == 0);
6779                         $tr_class .= ' multiple-previous' if ($meta->{'nprevious'} > 1);
6780                         print "<tr id=\"l$lineno\" class=\"$tr_class\">\n";
6781                         if ($group_size) {
6782                                 print "<td class=\"sha1\"";
6783                                 print " title=\"". esc_html($author) . ", $date\"";
6784                                 print " rowspan=\"$group_size\"" if ($group_size > 1);
6785                                 print ">";
6786                                 print $cgi->a({-href => href(action=>"commit",
6787                                                              hash=>$full_rev,
6788                                                              file_name=>$file_name)},
6789                                               esc_html($short_rev));
6790                                 if ($group_size >= 2) {
6791                                         my @author_initials = ($author =~ /\b([[:upper:]])\B/g);
6792                                         if (@author_initials) {
6793                                                 print "<br />" .
6794                                                       esc_html(join('', @author_initials));
6795                                                 #           or join('.', ...)
6796                                         }
6797                                 }
6798                                 print "</td>\n";
6799                         }
6800                         # 'previous' <sha1 of parent commit> <filename at commit>
6801                         if (exists $meta->{'previous'} &&
6802                             $meta->{'previous'} =~ /^([a-fA-F0-9]{40}) (.*)$/) {
6803                                 $meta->{'parent'} = $1;
6804                                 $meta->{'file_parent'} = unquote($2);
6805                         }
6806                         my $linenr_commit =
6807                                 exists($meta->{'parent'}) ?
6808                                 $meta->{'parent'} : $full_rev;
6809                         my $linenr_filename =
6810                                 exists($meta->{'file_parent'}) ?
6811                                 $meta->{'file_parent'} : unquote($meta->{'filename'});
6812                         my $blamed = href(action => 'blame',
6813                                           file_name => $linenr_filename,
6814                                           hash_base => $linenr_commit);
6815                         print "<td class=\"linenr\">";
6816                         print $cgi->a({ -href => "$blamed#l$orig_lineno",
6817                                         -class => "linenr" },
6818                                       esc_html($lineno));
6819                         print "</td>";
6820                         print "<td class=\"pre\">" . esc_html($data) . "</td>\n";
6821                         print "</tr>\n";
6822                 } # end while
6823
6824         }
6825
6826         # footer
6827         print "</tbody>\n".
6828               "</table>\n"; # class="blame"
6829         print "</div>\n";   # class="blame_body"
6830         close $fd
6831                 or print "Reading blob failed\n";
6832
6833         git_footer_html();
6834 }
6835
6836 sub git_blame {
6837         git_blame_common();
6838 }
6839
6840 sub git_blame_incremental {
6841         git_blame_common('incremental');
6842 }
6843
6844 sub git_blame_data {
6845         git_blame_common('data');
6846 }
6847
6848 sub git_tags {
6849         my $head = git_get_head_hash($project);
6850         git_header_html();
6851         git_print_page_nav('','', $head,undef,$head,format_ref_views('tags'));
6852         git_print_header_div('summary', $project);
6853
6854         my @tagslist = git_get_tags_list();
6855         if (@tagslist) {
6856                 git_tags_body(\@tagslist);
6857         }
6858         git_footer_html();
6859 }
6860
6861 sub git_heads {
6862         my $head = git_get_head_hash($project);
6863         git_header_html();
6864         git_print_page_nav('','', $head,undef,$head,format_ref_views('heads'));
6865         git_print_header_div('summary', $project);
6866
6867         my @headslist = git_get_heads_list();
6868         if (@headslist) {
6869                 git_heads_body(\@headslist, $head);
6870         }
6871         git_footer_html();
6872 }
6873
6874 # used both for single remote view and for list of all the remotes
6875 sub git_remotes {
6876         gitweb_check_feature('remote_heads')
6877                 or die_error(403, "Remote heads view is disabled");
6878
6879         my $head = git_get_head_hash($project);
6880         my $remote = $input_params{'hash'};
6881
6882         my $remotedata = git_get_remotes_list($remote);
6883         die_error(500, "Unable to get remote information") unless defined $remotedata;
6884
6885         unless (%$remotedata) {
6886                 die_error(404, defined $remote ?
6887                         "Remote $remote not found" :
6888                         "No remotes found");
6889         }
6890
6891         git_header_html(undef, undef, -action_extra => $remote);
6892         git_print_page_nav('', '',  $head, undef, $head,
6893                 format_ref_views($remote ? '' : 'remotes'));
6894
6895         fill_remote_heads($remotedata);
6896         if (defined $remote) {
6897                 git_print_header_div('remotes', "$remote remote for $project");
6898                 git_remote_block($remote, $remotedata->{$remote}, undef, $head);
6899         } else {
6900                 git_print_header_div('summary', "$project remotes");
6901                 git_remotes_body($remotedata, undef, $head);
6902         }
6903
6904         git_footer_html();
6905 }
6906
6907 sub git_blob_plain {
6908         my $type = shift;
6909         my $expires;
6910
6911         if (!defined $hash) {
6912                 if (defined $file_name) {
6913                         my $base = $hash_base || git_get_head_hash($project);
6914                         $hash = git_get_hash_by_path($base, $file_name, "blob")
6915                                 or die_error(404, "Cannot find file");
6916                 } else {
6917                         die_error(400, "No file name defined");
6918                 }
6919         } elsif ($hash =~ m/^[0-9a-fA-F]{40}$/) {
6920                 # blobs defined by non-textual hash id's can be cached
6921                 $expires = "+1d";
6922         }
6923
6924         open my $fd, "-|", git_cmd(), "cat-file", "blob", $hash
6925                 or die_error(500, "Open git-cat-file blob '$hash' failed");
6926
6927         # content-type (can include charset)
6928         $type = blob_contenttype($fd, $file_name, $type);
6929
6930         # "save as" filename, even when no $file_name is given
6931         my $save_as = "$hash";
6932         if (defined $file_name) {
6933                 $save_as = $file_name;
6934         } elsif ($type =~ m/^text\//) {
6935                 $save_as .= '.txt';
6936         }
6937
6938         # With XSS prevention on, blobs of all types except a few known safe
6939         # ones are served with "Content-Disposition: attachment" to make sure
6940         # they don't run in our security domain.  For certain image types,
6941         # blob view writes an <img> tag referring to blob_plain view, and we
6942         # want to be sure not to break that by serving the image as an
6943         # attachment (though Firefox 3 doesn't seem to care).
6944         my $sandbox = $prevent_xss &&
6945                 $type !~ m!^(?:text/[a-z]+|image/(?:gif|png|jpeg))(?:[ ;]|$)!;
6946
6947         # serve text/* as text/plain
6948         if ($prevent_xss &&
6949             ($type =~ m!^text/[a-z]+\b(.*)$! ||
6950              ($type =~ m!^[a-z]+/[a-z]\+xml\b(.*)$! && -T $fd))) {
6951                 my $rest = $1;
6952                 $rest = defined $rest ? $rest : '';
6953                 $type = "text/plain$rest";
6954         }
6955
6956         print $cgi->header(
6957                 -type => $type,
6958                 -expires => $expires,
6959                 -content_disposition =>
6960                         ($sandbox ? 'attachment' : 'inline')
6961                         . '; filename="' . $save_as . '"');
6962         local $/ = undef;
6963         binmode STDOUT, ':raw';
6964         print <$fd>;
6965         binmode STDOUT, ':utf8'; # as set at the beginning of gitweb.cgi
6966         close $fd;
6967 }
6968
6969 sub git_blob {
6970         my $expires;
6971
6972         if (!defined $hash) {
6973                 if (defined $file_name) {
6974                         my $base = $hash_base || git_get_head_hash($project);
6975                         $hash = git_get_hash_by_path($base, $file_name, "blob")
6976                                 or die_error(404, "Cannot find file");
6977                 } else {
6978                         die_error(400, "No file name defined");
6979                 }
6980         } elsif ($hash =~ m/^[0-9a-fA-F]{40}$/) {
6981                 # blobs defined by non-textual hash id's can be cached
6982                 $expires = "+1d";
6983         }
6984
6985         my $have_blame = gitweb_check_feature('blame');
6986         open my $fd, "-|", git_cmd(), "cat-file", "blob", $hash
6987                 or die_error(500, "Couldn't cat $file_name, $hash");
6988         my $mimetype = blob_mimetype($fd, $file_name);
6989         # use 'blob_plain' (aka 'raw') view for files that cannot be displayed
6990         if ($mimetype !~ m!^(?:text/|image/(?:gif|png|jpeg)$)! && -B $fd) {
6991                 close $fd;
6992                 return git_blob_plain($mimetype);
6993         }
6994         # we can have blame only for text/* mimetype
6995         $have_blame &&= ($mimetype =~ m!^text/!);
6996
6997         my $highlight = gitweb_check_feature('highlight');
6998         my $syntax = guess_file_syntax($highlight, $mimetype, $file_name);
6999         $fd = run_highlighter($fd, $highlight, $syntax)
7000                 if $syntax;
7001
7002         git_header_html(undef, $expires);
7003         my $formats_nav = '';
7004         if (defined $hash_base && (my %co = parse_commit($hash_base))) {
7005                 if (defined $file_name) {
7006                         if ($have_blame) {
7007                                 $formats_nav .=
7008                                         $cgi->a({-href => href(action=>"blame", -replay=>1)},
7009                                                 "blame") .
7010                                         " | ";
7011                         }
7012                         $formats_nav .=
7013                                 $cgi->a({-href => href(action=>"history", -replay=>1)},
7014                                         "history") .
7015                                 " | " .
7016                                 $cgi->a({-href => href(action=>"blob_plain", -replay=>1)},
7017                                         "raw") .
7018                                 " | " .
7019                                 $cgi->a({-href => href(action=>"blob",
7020                                                        hash_base=>"HEAD", file_name=>$file_name)},
7021                                         "HEAD");
7022                 } else {
7023                         $formats_nav .=
7024                                 $cgi->a({-href => href(action=>"blob_plain", -replay=>1)},
7025                                         "raw");
7026                 }
7027                 git_print_page_nav('','', $hash_base,$co{'tree'},$hash_base, $formats_nav);
7028                 git_print_header_div('commit', esc_html($co{'title'}), $hash_base);
7029         } else {
7030                 print "<div class=\"page_nav\">\n" .
7031                       "<br/><br/></div>\n" .
7032                       "<div class=\"title\">".esc_html($hash)."</div>\n";
7033         }
7034         git_print_page_path($file_name, "blob", $hash_base);
7035         print "<div class=\"page_body\">\n";
7036         if ($mimetype =~ m!^image/!) {
7037                 print qq!<img type="!.esc_attr($mimetype).qq!"!;
7038                 if ($file_name) {
7039                         print qq! alt="!.esc_attr($file_name).qq!" title="!.esc_attr($file_name).qq!"!;
7040                 }
7041                 print qq! src="! .
7042                       href(action=>"blob_plain", hash=>$hash,
7043                            hash_base=>$hash_base, file_name=>$file_name) .
7044                       qq!" />\n!;
7045         } else {
7046                 my $nr;
7047                 while (my $line = <$fd>) {
7048                         chomp $line;
7049                         $nr++;
7050                         $line = untabify($line);
7051                         printf qq!<div class="pre"><a id="l%i" href="%s#l%i" class="linenr">%4i</a> %s</div>\n!,
7052                                $nr, esc_attr(href(-replay => 1)), $nr, $nr,
7053                                $syntax ? sanitize($line) : esc_html($line, -nbsp=>1);
7054                 }
7055         }
7056         close $fd
7057                 or print "Reading blob failed.\n";
7058         print "</div>";
7059         git_footer_html();
7060 }
7061
7062 sub git_tree {
7063         if (!defined $hash_base) {
7064                 $hash_base = "HEAD";
7065         }
7066         if (!defined $hash) {
7067                 if (defined $file_name) {
7068                         $hash = git_get_hash_by_path($hash_base, $file_name, "tree");
7069                 } else {
7070                         $hash = $hash_base;
7071                 }
7072         }
7073         die_error(404, "No such tree") unless defined($hash);
7074
7075         my $show_sizes = gitweb_check_feature('show-sizes');
7076         my $have_blame = gitweb_check_feature('blame');
7077
7078         my @entries = ();
7079         {
7080                 local $/ = "\0";
7081                 open my $fd, "-|", git_cmd(), "ls-tree", '-z',
7082                         ($show_sizes ? '-l' : ()), @extra_options, $hash
7083                         or die_error(500, "Open git-ls-tree failed");
7084                 @entries = map { chomp; $_ } <$fd>;
7085                 close $fd
7086                         or die_error(404, "Reading tree failed");
7087         }
7088
7089         my $refs = git_get_references();
7090         my $ref = format_ref_marker($refs, $hash_base);
7091         git_header_html();
7092         my $basedir = '';
7093         if (defined $hash_base && (my %co = parse_commit($hash_base))) {
7094                 my @views_nav = ();
7095                 if (defined $file_name) {
7096                         push @views_nav,
7097                                 $cgi->a({-href => href(action=>"history", -replay=>1)},
7098                                         "history"),
7099                                 $cgi->a({-href => href(action=>"tree",
7100                                                        hash_base=>"HEAD", file_name=>$file_name)},
7101                                         "HEAD"),
7102                 }
7103                 my $snapshot_links = format_snapshot_links($hash);
7104                 if (defined $snapshot_links) {
7105                         # FIXME: Should be available when we have no hash base as well.
7106                         push @views_nav, $snapshot_links;
7107                 }
7108                 git_print_page_nav('tree','', $hash_base, undef, undef,
7109                                    join(' | ', @views_nav));
7110                 git_print_header_div('commit', esc_html($co{'title'}) . $ref, $hash_base);
7111         } else {
7112                 undef $hash_base;
7113                 print "<div class=\"page_nav\">\n";
7114                 print "<br/><br/></div>\n";
7115                 print "<div class=\"title\">".esc_html($hash)."</div>\n";
7116         }
7117         if (defined $file_name) {
7118                 $basedir = $file_name;
7119                 if ($basedir ne '' && substr($basedir, -1) ne '/') {
7120                         $basedir .= '/';
7121                 }
7122                 git_print_page_path($file_name, 'tree', $hash_base);
7123         }
7124         print "<div class=\"page_body\">\n";
7125         print "<table class=\"tree\">\n";
7126         my $alternate = 1;
7127         # '..' (top directory) link if possible
7128         if (defined $hash_base &&
7129             defined $file_name && $file_name =~ m![^/]+$!) {
7130                 if ($alternate) {
7131                         print "<tr class=\"dark\">\n";
7132                 } else {
7133                         print "<tr class=\"light\">\n";
7134                 }
7135                 $alternate ^= 1;
7136
7137                 my $up = $file_name;
7138                 $up =~ s!/?[^/]+$!!;
7139                 undef $up unless $up;
7140                 # based on git_print_tree_entry
7141                 print '<td class="mode">' . mode_str('040000') . "</td>\n";
7142                 print '<td class="size">&nbsp;</td>'."\n" if $show_sizes;
7143                 print '<td class="list">';
7144                 print $cgi->a({-href => href(action=>"tree",
7145                                              hash_base=>$hash_base,
7146                                              file_name=>$up)},
7147                               "..");
7148                 print "</td>\n";
7149                 print "<td class=\"link\"></td>\n";
7150
7151                 print "</tr>\n";
7152         }
7153         foreach my $line (@entries) {
7154                 my %t = parse_ls_tree_line($line, -z => 1, -l => $show_sizes);
7155
7156                 if ($alternate) {
7157                         print "<tr class=\"dark\">\n";
7158                 } else {
7159                         print "<tr class=\"light\">\n";
7160                 }
7161                 $alternate ^= 1;
7162
7163                 git_print_tree_entry(\%t, $basedir, $hash_base, $have_blame);
7164
7165                 print "</tr>\n";
7166         }
7167         print "</table>\n" .
7168               "</div>";
7169         git_footer_html();
7170 }
7171
7172 sub snapshot_name {
7173         my ($project, $hash) = @_;
7174
7175         # path/to/project.git  -> project
7176         # path/to/project/.git -> project
7177         my $name = to_utf8($project);
7178         $name =~ s,([^/])/*\.git$,$1,;
7179         $name = basename($name);
7180         # sanitize name
7181         $name =~ s/[[:cntrl:]]/?/g;
7182
7183         my $ver = $hash;
7184         if ($hash =~ /^[0-9a-fA-F]+$/) {
7185                 # shorten SHA-1 hash
7186                 my $full_hash = git_get_full_hash($project, $hash);
7187                 if ($full_hash =~ /^$hash/ && length($hash) > 7) {
7188                         $ver = git_get_short_hash($project, $hash);
7189                 }
7190         } elsif ($hash =~ m!^refs/tags/(.*)$!) {
7191                 # tags don't need shortened SHA-1 hash
7192                 $ver = $1;
7193         } else {
7194                 # branches and other need shortened SHA-1 hash
7195                 if ($hash =~ m!^refs/(?:heads|remotes)/(.*)$!) {
7196                         $ver = $1;
7197                 }
7198                 $ver .= '-' . git_get_short_hash($project, $hash);
7199         }
7200         # in case of hierarchical branch names
7201         $ver =~ s!/!.!g;
7202
7203         # name = project-version_string
7204         $name = "$name-$ver";
7205
7206         return wantarray ? ($name, $name) : $name;
7207 }
7208
7209 sub exit_if_unmodified_since {
7210         my ($latest_epoch) = @_;
7211         our $cgi;
7212
7213         my $if_modified = $cgi->http('IF_MODIFIED_SINCE');
7214         if (defined $if_modified) {
7215                 my $since;
7216                 if (eval { require HTTP::Date; 1; }) {
7217                         $since = HTTP::Date::str2time($if_modified);
7218                 } elsif (eval { require Time::ParseDate; 1; }) {
7219                         $since = Time::ParseDate::parsedate($if_modified, GMT => 1);
7220                 }
7221                 if (defined $since && $latest_epoch <= $since) {
7222                         my %latest_date = parse_date($latest_epoch);
7223                         print $cgi->header(
7224                                 -last_modified => $latest_date{'rfc2822'},
7225                                 -status => '304 Not Modified');
7226                         goto DONE_GITWEB;
7227                 }
7228         }
7229 }
7230
7231 sub git_snapshot {
7232         my $format = $input_params{'snapshot_format'};
7233         if (!@snapshot_fmts) {
7234                 die_error(403, "Snapshots not allowed");
7235         }
7236         # default to first supported snapshot format
7237         $format ||= $snapshot_fmts[0];
7238         if ($format !~ m/^[a-z0-9]+$/) {
7239                 die_error(400, "Invalid snapshot format parameter");
7240         } elsif (!exists($known_snapshot_formats{$format})) {
7241                 die_error(400, "Unknown snapshot format");
7242         } elsif ($known_snapshot_formats{$format}{'disabled'}) {
7243                 die_error(403, "Snapshot format not allowed");
7244         } elsif (!grep($_ eq $format, @snapshot_fmts)) {
7245                 die_error(403, "Unsupported snapshot format");
7246         }
7247
7248         my $type = git_get_type("$hash^{}");
7249         if (!$type) {
7250                 die_error(404, 'Object does not exist');
7251         }  elsif ($type eq 'blob') {
7252                 die_error(400, 'Object is not a tree-ish');
7253         }
7254
7255         my ($name, $prefix) = snapshot_name($project, $hash);
7256         my $filename = "$name$known_snapshot_formats{$format}{'suffix'}";
7257
7258         my %co = parse_commit($hash);
7259         exit_if_unmodified_since($co{'committer_epoch'}) if %co;
7260
7261         my $cmd = quote_command(
7262                 git_cmd(), 'archive',
7263                 "--format=$known_snapshot_formats{$format}{'format'}",
7264                 "--prefix=$prefix/", $hash);
7265         if (exists $known_snapshot_formats{$format}{'compressor'}) {
7266                 $cmd .= ' | ' . quote_command(@{$known_snapshot_formats{$format}{'compressor'}});
7267         }
7268
7269         $filename =~ s/(["\\])/\\$1/g;
7270         my %latest_date;
7271         if (%co) {
7272                 %latest_date = parse_date($co{'committer_epoch'}, $co{'committer_tz'});
7273         }
7274
7275         print $cgi->header(
7276                 -type => $known_snapshot_formats{$format}{'type'},
7277                 -content_disposition => 'inline; filename="' . $filename . '"',
7278                 %co ? (-last_modified => $latest_date{'rfc2822'}) : (),
7279                 -status => '200 OK');
7280
7281         open my $fd, "-|", $cmd
7282                 or die_error(500, "Execute git-archive failed");
7283         binmode STDOUT, ':raw';
7284         print <$fd>;
7285         binmode STDOUT, ':utf8'; # as set at the beginning of gitweb.cgi
7286         close $fd;
7287 }
7288
7289 sub git_log_generic {
7290         my ($fmt_name, $body_subr, $base, $parent, $file_name, $file_hash) = @_;
7291
7292         my $head = git_get_head_hash($project);
7293         if (!defined $base) {
7294                 $base = $head;
7295         }
7296         if (!defined $page) {
7297                 $page = 0;
7298         }
7299         my $refs = git_get_references();
7300
7301         my $commit_hash = $base;
7302         if (defined $parent) {
7303                 $commit_hash = "$parent..$base";
7304         }
7305         my @commitlist =
7306                 parse_commits($commit_hash, 101, (100 * $page),
7307                               defined $file_name ? ($file_name, "--full-history") : ());
7308
7309         my $ftype;
7310         if (!defined $file_hash && defined $file_name) {
7311                 # some commits could have deleted file in question,
7312                 # and not have it in tree, but one of them has to have it
7313                 for (my $i = 0; $i < @commitlist; $i++) {
7314                         $file_hash = git_get_hash_by_path($commitlist[$i]{'id'}, $file_name);
7315                         last if defined $file_hash;
7316                 }
7317         }
7318         if (defined $file_hash) {
7319                 $ftype = git_get_type($file_hash);
7320         }
7321         if (defined $file_name && !defined $ftype) {
7322                 die_error(500, "Unknown type of object");
7323         }
7324         my %co;
7325         if (defined $file_name) {
7326                 %co = parse_commit($base)
7327                         or die_error(404, "Unknown commit object");
7328         }
7329
7330
7331         my $paging_nav = format_paging_nav($fmt_name, $page, $#commitlist >= 100);
7332         my $next_link = '';
7333         if ($#commitlist >= 100) {
7334                 $next_link =
7335                         $cgi->a({-href => href(-replay=>1, page=>$page+1),
7336                                  -accesskey => "n", -title => "Alt-n"}, "next");
7337         }
7338         my $patch_max = gitweb_get_feature('patches');
7339         if ($patch_max && !defined $file_name) {
7340                 if ($patch_max < 0 || @commitlist <= $patch_max) {
7341                         $paging_nav .= " &sdot; " .
7342                                 $cgi->a({-href => href(action=>"patches", -replay=>1)},
7343                                         "patches");
7344                 }
7345         }
7346
7347         git_header_html();
7348         git_print_page_nav($fmt_name,'', $hash,$hash,$hash, $paging_nav);
7349         if (defined $file_name) {
7350                 git_print_header_div('commit', esc_html($co{'title'}), $base);
7351         } else {
7352                 git_print_header_div('summary', $project)
7353         }
7354         git_print_page_path($file_name, $ftype, $hash_base)
7355                 if (defined $file_name);
7356
7357         $body_subr->(\@commitlist, 0, 99, $refs, $next_link,
7358                      $file_name, $file_hash, $ftype);
7359
7360         git_footer_html();
7361 }
7362
7363 sub git_log {
7364         git_log_generic('log', \&git_log_body,
7365                         $hash, $hash_parent);
7366 }
7367
7368 sub git_commit {
7369         $hash ||= $hash_base || "HEAD";
7370         my %co = parse_commit($hash)
7371             or die_error(404, "Unknown commit object");
7372
7373         my $parent  = $co{'parent'};
7374         my $parents = $co{'parents'}; # listref
7375
7376         # we need to prepare $formats_nav before any parameter munging
7377         my $formats_nav;
7378         if (!defined $parent) {
7379                 # --root commitdiff
7380                 $formats_nav .= '(initial)';
7381         } elsif (@$parents == 1) {
7382                 # single parent commit
7383                 $formats_nav .=
7384                         '(parent: ' .
7385                         $cgi->a({-href => href(action=>"commit",
7386                                                hash=>$parent)},
7387                                 esc_html(substr($parent, 0, 7))) .
7388                         ')';
7389         } else {
7390                 # merge commit
7391                 $formats_nav .=
7392                         '(merge: ' .
7393                         join(' ', map {
7394                                 $cgi->a({-href => href(action=>"commit",
7395                                                        hash=>$_)},
7396                                         esc_html(substr($_, 0, 7)));
7397                         } @$parents ) .
7398                         ')';
7399         }
7400         if (gitweb_check_feature('patches') && @$parents <= 1) {
7401                 $formats_nav .= " | " .
7402                         $cgi->a({-href => href(action=>"patch", -replay=>1)},
7403                                 "patch");
7404         }
7405
7406         if (!defined $parent) {
7407                 $parent = "--root";
7408         }
7409         my @difftree;
7410         open my $fd, "-|", git_cmd(), "diff-tree", '-r', "--no-commit-id",
7411                 @diff_opts,
7412                 (@$parents <= 1 ? $parent : '-c'),
7413                 $hash, "--"
7414                 or die_error(500, "Open git-diff-tree failed");
7415         @difftree = map { chomp; $_ } <$fd>;
7416         close $fd or die_error(404, "Reading git-diff-tree failed");
7417
7418         # non-textual hash id's can be cached
7419         my $expires;
7420         if ($hash =~ m/^[0-9a-fA-F]{40}$/) {
7421                 $expires = "+1d";
7422         }
7423         my $refs = git_get_references();
7424         my $ref = format_ref_marker($refs, $co{'id'});
7425
7426         git_header_html(undef, $expires);
7427         git_print_page_nav('commit', '',
7428                            $hash, $co{'tree'}, $hash,
7429                            $formats_nav);
7430
7431         if (defined $co{'parent'}) {
7432                 git_print_header_div('commitdiff', esc_html($co{'title'}) . $ref, $hash);
7433         } else {
7434                 git_print_header_div('tree', esc_html($co{'title'}) . $ref, $co{'tree'}, $hash);
7435         }
7436         print "<div class=\"title_text\">\n" .
7437               "<table class=\"object_header\">\n";
7438         git_print_authorship_rows(\%co);
7439         print "<tr><td>commit</td><td class=\"sha1\">$co{'id'}</td></tr>\n";
7440         print "<tr>" .
7441               "<td>tree</td>" .
7442               "<td class=\"sha1\">" .
7443               $cgi->a({-href => href(action=>"tree", hash=>$co{'tree'}, hash_base=>$hash),
7444                        class => "list"}, $co{'tree'}) .
7445               "</td>" .
7446               "<td class=\"link\">" .
7447               $cgi->a({-href => href(action=>"tree", hash=>$co{'tree'}, hash_base=>$hash)},
7448                       "tree");
7449         my $snapshot_links = format_snapshot_links($hash);
7450         if (defined $snapshot_links) {
7451                 print " | " . $snapshot_links;
7452         }
7453         print "</td>" .
7454               "</tr>\n";
7455
7456         foreach my $par (@$parents) {
7457                 print "<tr>" .
7458                       "<td>parent</td>" .
7459                       "<td class=\"sha1\">" .
7460                       $cgi->a({-href => href(action=>"commit", hash=>$par),
7461                                class => "list"}, $par) .
7462                       "</td>" .
7463                       "<td class=\"link\">" .
7464                       $cgi->a({-href => href(action=>"commit", hash=>$par)}, "commit") .
7465                       " | " .
7466                       $cgi->a({-href => href(action=>"commitdiff", hash=>$hash, hash_parent=>$par)}, "diff") .
7467                       "</td>" .
7468                       "</tr>\n";
7469         }
7470         print "</table>".
7471               "</div>\n";
7472
7473         print "<div class=\"page_body\">\n";
7474         git_print_log($co{'comment'});
7475         print "</div>\n";
7476
7477         git_difftree_body(\@difftree, $hash, @$parents);
7478
7479         git_footer_html();
7480 }
7481
7482 sub git_object {
7483         # object is defined by:
7484         # - hash or hash_base alone
7485         # - hash_base and file_name
7486         my $type;
7487
7488         # - hash or hash_base alone
7489         if ($hash || ($hash_base && !defined $file_name)) {
7490                 my $object_id = $hash || $hash_base;
7491
7492                 open my $fd, "-|", quote_command(
7493                         git_cmd(), 'cat-file', '-t', $object_id) . ' 2> /dev/null'
7494                         or die_error(404, "Object does not exist");
7495                 $type = <$fd>;
7496                 chomp $type;
7497                 close $fd
7498                         or die_error(404, "Object does not exist");
7499
7500         # - hash_base and file_name
7501         } elsif ($hash_base && defined $file_name) {
7502                 $file_name =~ s,/+$,,;
7503
7504                 system(git_cmd(), "cat-file", '-e', $hash_base) == 0
7505                         or die_error(404, "Base object does not exist");
7506
7507                 # here errors should not happen
7508                 open my $fd, "-|", git_cmd(), "ls-tree", $hash_base, "--", $file_name
7509                         or die_error(500, "Open git-ls-tree failed");
7510                 my $line = <$fd>;
7511                 close $fd;
7512
7513                 #'100644 blob 0fa3f3a66fb6a137f6ec2c19351ed4d807070ffa  panic.c'
7514                 unless ($line && $line =~ m/^([0-9]+) (.+) ([0-9a-fA-F]{40})\t/) {
7515                         die_error(404, "File or directory for given base does not exist");
7516                 }
7517                 $type = $2;
7518                 $hash = $3;
7519         } else {
7520                 die_error(400, "Not enough information to find object");
7521         }
7522
7523         print $cgi->redirect(-uri => href(action=>$type, -full=>1,
7524                                           hash=>$hash, hash_base=>$hash_base,
7525                                           file_name=>$file_name),
7526                              -status => '302 Found');
7527 }
7528
7529 sub git_blobdiff {
7530         my $format = shift || 'html';
7531         my $diff_style = $input_params{'diff_style'} || 'inline';
7532
7533         my $fd;
7534         my @difftree;
7535         my %diffinfo;
7536         my $expires;
7537
7538         # preparing $fd and %diffinfo for git_patchset_body
7539         # new style URI
7540         if (defined $hash_base && defined $hash_parent_base) {
7541                 if (defined $file_name) {
7542                         # read raw output
7543                         open $fd, "-|", git_cmd(), "diff-tree", '-r', @diff_opts,
7544                                 $hash_parent_base, $hash_base,
7545                                 "--", (defined $file_parent ? $file_parent : ()), $file_name
7546                                 or die_error(500, "Open git-diff-tree failed");
7547                         @difftree = map { chomp; $_ } <$fd>;
7548                         close $fd
7549                                 or die_error(404, "Reading git-diff-tree failed");
7550                         @difftree
7551                                 or die_error(404, "Blob diff not found");
7552
7553                 } elsif (defined $hash &&
7554                          $hash =~ /[0-9a-fA-F]{40}/) {
7555                         # try to find filename from $hash
7556
7557                         # read filtered raw output
7558                         open $fd, "-|", git_cmd(), "diff-tree", '-r', @diff_opts,
7559                                 $hash_parent_base, $hash_base, "--"
7560                                 or die_error(500, "Open git-diff-tree failed");
7561                         @difftree =
7562                                 # ':100644 100644 03b21826... 3b93d5e7... M     ls-files.c'
7563                                 # $hash == to_id
7564                                 grep { /^:[0-7]{6} [0-7]{6} [0-9a-fA-F]{40} $hash/ }
7565                                 map { chomp; $_ } <$fd>;
7566                         close $fd
7567                                 or die_error(404, "Reading git-diff-tree failed");
7568                         @difftree
7569                                 or die_error(404, "Blob diff not found");
7570
7571                 } else {
7572                         die_error(400, "Missing one of the blob diff parameters");
7573                 }
7574
7575                 if (@difftree > 1) {
7576                         die_error(400, "Ambiguous blob diff specification");
7577                 }
7578
7579                 %diffinfo = parse_difftree_raw_line($difftree[0]);
7580                 $file_parent ||= $diffinfo{'from_file'} || $file_name;
7581                 $file_name   ||= $diffinfo{'to_file'};
7582
7583                 $hash_parent ||= $diffinfo{'from_id'};
7584                 $hash        ||= $diffinfo{'to_id'};
7585
7586                 # non-textual hash id's can be cached
7587                 if ($hash_base =~ m/^[0-9a-fA-F]{40}$/ &&
7588                     $hash_parent_base =~ m/^[0-9a-fA-F]{40}$/) {
7589                         $expires = '+1d';
7590                 }
7591
7592                 # open patch output
7593                 open $fd, "-|", git_cmd(), "diff-tree", '-r', @diff_opts,
7594                         '-p', ($format eq 'html' ? "--full-index" : ()),
7595                         $hash_parent_base, $hash_base,
7596                         "--", (defined $file_parent ? $file_parent : ()), $file_name
7597                         or die_error(500, "Open git-diff-tree failed");
7598         }
7599
7600         # old/legacy style URI -- not generated anymore since 1.4.3.
7601         if (!%diffinfo) {
7602                 die_error('404 Not Found', "Missing one of the blob diff parameters")
7603         }
7604
7605         # header
7606         if ($format eq 'html') {
7607                 my $formats_nav =
7608                         $cgi->a({-href => href(action=>"blobdiff_plain", -replay=>1)},
7609                                 "raw");
7610                 $formats_nav .= diff_style_nav($diff_style);
7611                 git_header_html(undef, $expires);
7612                 if (defined $hash_base && (my %co = parse_commit($hash_base))) {
7613                         git_print_page_nav('','', $hash_base,$co{'tree'},$hash_base, $formats_nav);
7614                         git_print_header_div('commit', esc_html($co{'title'}), $hash_base);
7615                 } else {
7616                         print "<div class=\"page_nav\"><br/>$formats_nav<br/></div>\n";
7617                         print "<div class=\"title\">".esc_html("$hash vs $hash_parent")."</div>\n";
7618                 }
7619                 if (defined $file_name) {
7620                         git_print_page_path($file_name, "blob", $hash_base);
7621                 } else {
7622                         print "<div class=\"page_path\"></div>\n";
7623                 }
7624
7625         } elsif ($format eq 'plain') {
7626                 print $cgi->header(
7627                         -type => 'text/plain',
7628                         -charset => 'utf-8',
7629                         -expires => $expires,
7630                         -content_disposition => 'inline; filename="' . "$file_name" . '.patch"');
7631
7632                 print "X-Git-Url: " . $cgi->self_url() . "\n\n";
7633
7634         } else {
7635                 die_error(400, "Unknown blobdiff format");
7636         }
7637
7638         # patch
7639         if ($format eq 'html') {
7640                 print "<div class=\"page_body\">\n";
7641
7642                 git_patchset_body($fd, $diff_style,
7643                                   [ \%diffinfo ], $hash_base, $hash_parent_base);
7644                 close $fd;
7645
7646                 print "</div>\n"; # class="page_body"
7647                 git_footer_html();
7648
7649         } else {
7650                 while (my $line = <$fd>) {
7651                         $line =~ s!a/($hash|$hash_parent)!'a/'.esc_path($diffinfo{'from_file'})!eg;
7652                         $line =~ s!b/($hash|$hash_parent)!'b/'.esc_path($diffinfo{'to_file'})!eg;
7653
7654                         print $line;
7655
7656                         last if $line =~ m!^\+\+\+!;
7657                 }
7658                 local $/ = undef;
7659                 print <$fd>;
7660                 close $fd;
7661         }
7662 }
7663
7664 sub git_blobdiff_plain {
7665         git_blobdiff('plain');
7666 }
7667
7668 # assumes that it is added as later part of already existing navigation,
7669 # so it returns "| foo | bar" rather than just "foo | bar"
7670 sub diff_style_nav {
7671         my ($diff_style, $is_combined) = @_;
7672         $diff_style ||= 'inline';
7673
7674         return "" if ($is_combined);
7675
7676         my @styles = (inline => 'inline', 'sidebyside' => 'side by side');
7677         my %styles = @styles;
7678         @styles =
7679                 @styles[ map { $_ * 2 } 0..$#styles/2 ];
7680
7681         return join '',
7682                 map { " | ".$_ }
7683                 map {
7684                         $_ eq $diff_style ? $styles{$_} :
7685                         $cgi->a({-href => href(-replay=>1, diff_style => $_)}, $styles{$_})
7686                 } @styles;
7687 }
7688
7689 sub git_commitdiff {
7690         my %params = @_;
7691         my $format = $params{-format} || 'html';
7692         my $diff_style = $input_params{'diff_style'} || 'inline';
7693
7694         my ($patch_max) = gitweb_get_feature('patches');
7695         if ($format eq 'patch') {
7696                 die_error(403, "Patch view not allowed") unless $patch_max;
7697         }
7698
7699         $hash ||= $hash_base || "HEAD";
7700         my %co = parse_commit($hash)
7701             or die_error(404, "Unknown commit object");
7702
7703         # choose format for commitdiff for merge
7704         if (! defined $hash_parent && @{$co{'parents'}} > 1) {
7705                 $hash_parent = '--cc';
7706         }
7707         # we need to prepare $formats_nav before almost any parameter munging
7708         my $formats_nav;
7709         if ($format eq 'html') {
7710                 $formats_nav =
7711                         $cgi->a({-href => href(action=>"commitdiff_plain", -replay=>1)},
7712                                 "raw");
7713                 if ($patch_max && @{$co{'parents'}} <= 1) {
7714                         $formats_nav .= " | " .
7715                                 $cgi->a({-href => href(action=>"patch", -replay=>1)},
7716                                         "patch");
7717                 }
7718                 $formats_nav .= diff_style_nav($diff_style, @{$co{'parents'}} > 1);
7719
7720                 if (defined $hash_parent &&
7721                     $hash_parent ne '-c' && $hash_parent ne '--cc') {
7722                         # commitdiff with two commits given
7723                         my $hash_parent_short = $hash_parent;
7724                         if ($hash_parent =~ m/^[0-9a-fA-F]{40}$/) {
7725                                 $hash_parent_short = substr($hash_parent, 0, 7);
7726                         }
7727                         $formats_nav .=
7728                                 ' (from';
7729                         for (my $i = 0; $i < @{$co{'parents'}}; $i++) {
7730                                 if ($co{'parents'}[$i] eq $hash_parent) {
7731                                         $formats_nav .= ' parent ' . ($i+1);
7732                                         last;
7733                                 }
7734                         }
7735                         $formats_nav .= ': ' .
7736                                 $cgi->a({-href => href(-replay=>1,
7737                                                        hash=>$hash_parent, hash_base=>undef)},
7738                                         esc_html($hash_parent_short)) .
7739                                 ')';
7740                 } elsif (!$co{'parent'}) {
7741                         # --root commitdiff
7742                         $formats_nav .= ' (initial)';
7743                 } elsif (scalar @{$co{'parents'}} == 1) {
7744                         # single parent commit
7745                         $formats_nav .=
7746                                 ' (parent: ' .
7747                                 $cgi->a({-href => href(-replay=>1,
7748                                                        hash=>$co{'parent'}, hash_base=>undef)},
7749                                         esc_html(substr($co{'parent'}, 0, 7))) .
7750                                 ')';
7751                 } else {
7752                         # merge commit
7753                         if ($hash_parent eq '--cc') {
7754                                 $formats_nav .= ' | ' .
7755                                         $cgi->a({-href => href(-replay=>1,
7756                                                                hash=>$hash, hash_parent=>'-c')},
7757                                                 'combined');
7758                         } else { # $hash_parent eq '-c'
7759                                 $formats_nav .= ' | ' .
7760                                         $cgi->a({-href => href(-replay=>1,
7761                                                                hash=>$hash, hash_parent=>'--cc')},
7762                                                 'compact');
7763                         }
7764                         $formats_nav .=
7765                                 ' (merge: ' .
7766                                 join(' ', map {
7767                                         $cgi->a({-href => href(-replay=>1,
7768                                                                hash=>$_, hash_base=>undef)},
7769                                                 esc_html(substr($_, 0, 7)));
7770                                 } @{$co{'parents'}} ) .
7771                                 ')';
7772                 }
7773         }
7774
7775         my $hash_parent_param = $hash_parent;
7776         if (!defined $hash_parent_param) {
7777                 # --cc for multiple parents, --root for parentless
7778                 $hash_parent_param =
7779                         @{$co{'parents'}} > 1 ? '--cc' : $co{'parent'} || '--root';
7780         }
7781
7782         # read commitdiff
7783         my $fd;
7784         my @difftree;
7785         if ($format eq 'html') {
7786                 open $fd, "-|", git_cmd(), "diff-tree", '-r', @diff_opts,
7787                         "--no-commit-id", "--patch-with-raw", "--full-index",
7788                         $hash_parent_param, $hash, "--"
7789                         or die_error(500, "Open git-diff-tree failed");
7790
7791                 while (my $line = <$fd>) {
7792                         chomp $line;
7793                         # empty line ends raw part of diff-tree output
7794                         last unless $line;
7795                         push @difftree, scalar parse_difftree_raw_line($line);
7796                 }
7797
7798         } elsif ($format eq 'plain') {
7799                 open $fd, "-|", git_cmd(), "diff-tree", '-r', @diff_opts,
7800                         '-p', $hash_parent_param, $hash, "--"
7801                         or die_error(500, "Open git-diff-tree failed");
7802         } elsif ($format eq 'patch') {
7803                 # For commit ranges, we limit the output to the number of
7804                 # patches specified in the 'patches' feature.
7805                 # For single commits, we limit the output to a single patch,
7806                 # diverging from the git-format-patch default.
7807                 my @commit_spec = ();
7808                 if ($hash_parent) {
7809                         if ($patch_max > 0) {
7810                                 push @commit_spec, "-$patch_max";
7811                         }
7812                         push @commit_spec, '-n', "$hash_parent..$hash";
7813                 } else {
7814                         if ($params{-single}) {
7815                                 push @commit_spec, '-1';
7816                         } else {
7817                                 if ($patch_max > 0) {
7818                                         push @commit_spec, "-$patch_max";
7819                                 }
7820                                 push @commit_spec, "-n";
7821                         }
7822                         push @commit_spec, '--root', $hash;
7823                 }
7824                 open $fd, "-|", git_cmd(), "format-patch", @diff_opts,
7825                         '--encoding=utf8', '--stdout', @commit_spec
7826                         or die_error(500, "Open git-format-patch failed");
7827         } else {
7828                 die_error(400, "Unknown commitdiff format");
7829         }
7830
7831         # non-textual hash id's can be cached
7832         my $expires;
7833         if ($hash =~ m/^[0-9a-fA-F]{40}$/) {
7834                 $expires = "+1d";
7835         }
7836
7837         # write commit message
7838         if ($format eq 'html') {
7839                 my $refs = git_get_references();
7840                 my $ref = format_ref_marker($refs, $co{'id'});
7841
7842                 git_header_html(undef, $expires);
7843                 git_print_page_nav('commitdiff','', $hash,$co{'tree'},$hash, $formats_nav);
7844                 git_print_header_div('commit', esc_html($co{'title'}) . $ref, $hash);
7845                 print "<div class=\"title_text\">\n" .
7846                       "<table class=\"object_header\">\n";
7847                 git_print_authorship_rows(\%co);
7848                 print "</table>".
7849                       "</div>\n";
7850                 print "<div class=\"page_body\">\n";
7851                 if (@{$co{'comment'}} > 1) {
7852                         print "<div class=\"log\">\n";
7853                         git_print_log($co{'comment'}, -final_empty_line=> 1, -remove_title => 1);
7854                         print "</div>\n"; # class="log"
7855                 }
7856
7857         } elsif ($format eq 'plain') {
7858                 my $refs = git_get_references("tags");
7859                 my $tagname = git_get_rev_name_tags($hash);
7860                 my $filename = basename($project) . "-$hash.patch";
7861
7862                 print $cgi->header(
7863                         -type => 'text/plain',
7864                         -charset => 'utf-8',
7865                         -expires => $expires,
7866                         -content_disposition => 'inline; filename="' . "$filename" . '"');
7867                 my %ad = parse_date($co{'author_epoch'}, $co{'author_tz'});
7868                 print "From: " . to_utf8($co{'author'}) . "\n";
7869                 print "Date: $ad{'rfc2822'} ($ad{'tz_local'})\n";
7870                 print "Subject: " . to_utf8($co{'title'}) . "\n";
7871
7872                 print "X-Git-Tag: $tagname\n" if $tagname;
7873                 print "X-Git-Url: " . $cgi->self_url() . "\n\n";
7874
7875                 foreach my $line (@{$co{'comment'}}) {
7876                         print to_utf8($line) . "\n";
7877                 }
7878                 print "---\n\n";
7879         } elsif ($format eq 'patch') {
7880                 my $filename = basename($project) . "-$hash.patch";
7881
7882                 print $cgi->header(
7883                         -type => 'text/plain',
7884                         -charset => 'utf-8',
7885                         -expires => $expires,
7886                         -content_disposition => 'inline; filename="' . "$filename" . '"');
7887         }
7888
7889         # write patch
7890         if ($format eq 'html') {
7891                 my $use_parents = !defined $hash_parent ||
7892                         $hash_parent eq '-c' || $hash_parent eq '--cc';
7893                 git_difftree_body(\@difftree, $hash,
7894                                   $use_parents ? @{$co{'parents'}} : $hash_parent);
7895                 print "<br/>\n";
7896
7897                 git_patchset_body($fd, $diff_style,
7898                                   \@difftree, $hash,
7899                                   $use_parents ? @{$co{'parents'}} : $hash_parent);
7900                 close $fd;
7901                 print "</div>\n"; # class="page_body"
7902                 git_footer_html();
7903
7904         } elsif ($format eq 'plain') {
7905                 local $/ = undef;
7906                 print <$fd>;
7907                 close $fd
7908                         or print "Reading git-diff-tree failed\n";
7909         } elsif ($format eq 'patch') {
7910                 local $/ = undef;
7911                 print <$fd>;
7912                 close $fd
7913                         or print "Reading git-format-patch failed\n";
7914         }
7915 }
7916
7917 sub git_commitdiff_plain {
7918         git_commitdiff(-format => 'plain');
7919 }
7920
7921 # format-patch-style patches
7922 sub git_patch {
7923         git_commitdiff(-format => 'patch', -single => 1);
7924 }
7925
7926 sub git_patches {
7927         git_commitdiff(-format => 'patch');
7928 }
7929
7930 sub git_history {
7931         git_log_generic('history', \&git_history_body,
7932                         $hash_base, $hash_parent_base,
7933                         $file_name, $hash);
7934 }
7935
7936 sub git_search {
7937         $searchtype ||= 'commit';
7938
7939         # check if appropriate features are enabled
7940         gitweb_check_feature('search')
7941                 or die_error(403, "Search is disabled");
7942         if ($searchtype eq 'pickaxe') {
7943                 # pickaxe may take all resources of your box and run for several minutes
7944                 # with every query - so decide by yourself how public you make this feature
7945                 gitweb_check_feature('pickaxe')
7946                         or die_error(403, "Pickaxe search is disabled");
7947         }
7948         if ($searchtype eq 'grep') {
7949                 # grep search might be potentially CPU-intensive, too
7950                 gitweb_check_feature('grep')
7951                         or die_error(403, "Grep search is disabled");
7952         }
7953
7954         if (!defined $searchtext) {
7955                 die_error(400, "Text field is empty");
7956         }
7957         if (!defined $hash) {
7958                 $hash = git_get_head_hash($project);
7959         }
7960         my %co = parse_commit($hash);
7961         if (!%co) {
7962                 die_error(404, "Unknown commit object");
7963         }
7964         if (!defined $page) {
7965                 $page = 0;
7966         }
7967
7968         if ($searchtype eq 'commit' ||
7969             $searchtype eq 'author' ||
7970             $searchtype eq 'committer') {
7971                 git_search_message(%co);
7972         } elsif ($searchtype eq 'pickaxe') {
7973                 git_search_changes(%co);
7974         } elsif ($searchtype eq 'grep') {
7975                 git_search_files(%co);
7976         } else {
7977                 die_error(400, "Unknown search type");
7978         }
7979 }
7980
7981 sub git_search_help {
7982         git_header_html();
7983         git_print_page_nav('','', $hash,$hash,$hash);
7984         print <<EOT;
7985 <p><strong>Pattern</strong> is by default a normal string that is matched precisely (but without
7986 regard to case, except in the case of pickaxe). However, when you check the <em>re</em> checkbox,
7987 the pattern entered is recognized as the POSIX extended
7988 <a href="http://en.wikipedia.org/wiki/Regular_expression">regular expression</a> (also case
7989 insensitive).</p>
7990 <dl>
7991 <dt><b>commit</b></dt>
7992 <dd>The commit messages and authorship information will be scanned for the given pattern.</dd>
7993 EOT
7994         my $have_grep = gitweb_check_feature('grep');
7995         if ($have_grep) {
7996                 print <<EOT;
7997 <dt><b>grep</b></dt>
7998 <dd>All files in the currently selected tree (HEAD unless you are explicitly browsing
7999     a different one) are searched for the given pattern. On large trees, this search can take
8000 a while and put some strain on the server, so please use it with some consideration. Note that
8001 due to git-grep peculiarity, currently if regexp mode is turned off, the matches are
8002 case-sensitive.</dd>
8003 EOT
8004         }
8005         print <<EOT;
8006 <dt><b>author</b></dt>
8007 <dd>Name and e-mail of the change author and date of birth of the patch will be scanned for the given pattern.</dd>
8008 <dt><b>committer</b></dt>
8009 <dd>Name and e-mail of the committer and date of commit will be scanned for the given pattern.</dd>
8010 EOT
8011         my $have_pickaxe = gitweb_check_feature('pickaxe');
8012         if ($have_pickaxe) {
8013                 print <<EOT;
8014 <dt><b>pickaxe</b></dt>
8015 <dd>All commits that caused the string to appear or disappear from any file (changes that
8016 added, removed or "modified" the string) will be listed. This search can take a while and
8017 takes a lot of strain on the server, so please use it wisely. Note that since you may be
8018 interested even in changes just changing the case as well, this search is case sensitive.</dd>
8019 EOT
8020         }
8021         print "</dl>\n";
8022         git_footer_html();
8023 }
8024
8025 sub git_shortlog {
8026         git_log_generic('shortlog', \&git_shortlog_body,
8027                         $hash, $hash_parent);
8028 }
8029
8030 ## ......................................................................
8031 ## feeds (RSS, Atom; OPML)
8032
8033 sub git_feed {
8034         my $format = shift || 'atom';
8035         my $have_blame = gitweb_check_feature('blame');
8036
8037         # Atom: http://www.atomenabled.org/developers/syndication/
8038         # RSS:  http://www.notestips.com/80256B3A007F2692/1/NAMO5P9UPQ
8039         if ($format ne 'rss' && $format ne 'atom') {
8040                 die_error(400, "Unknown web feed format");
8041         }
8042
8043         # log/feed of current (HEAD) branch, log of given branch, history of file/directory
8044         my $head = $hash || 'HEAD';
8045         my @commitlist = parse_commits($head, 150, 0, $file_name);
8046
8047         my %latest_commit;
8048         my %latest_date;
8049         my $content_type = "application/$format+xml";
8050         if (defined $cgi->http('HTTP_ACCEPT') &&
8051                  $cgi->Accept('text/xml') > $cgi->Accept($content_type)) {
8052                 # browser (feed reader) prefers text/xml
8053                 $content_type = 'text/xml';
8054         }
8055         if (defined($commitlist[0])) {
8056                 %latest_commit = %{$commitlist[0]};
8057                 my $latest_epoch = $latest_commit{'committer_epoch'};
8058                 exit_if_unmodified_since($latest_epoch);
8059                 %latest_date = parse_date($latest_epoch, $latest_commit{'committer_tz'});
8060         }
8061         print $cgi->header(
8062                 -type => $content_type,
8063                 -charset => 'utf-8',
8064                 %latest_date ? (-last_modified => $latest_date{'rfc2822'}) : (),
8065                 -status => '200 OK');
8066
8067         # Optimization: skip generating the body if client asks only
8068         # for Last-Modified date.
8069         return if ($cgi->request_method() eq 'HEAD');
8070
8071         # header variables
8072         my $title = "$site_name - $project/$action";
8073         my $feed_type = 'log';
8074         if (defined $hash) {
8075                 $title .= " - '$hash'";
8076                 $feed_type = 'branch log';
8077                 if (defined $file_name) {
8078                         $title .= " :: $file_name";
8079                         $feed_type = 'history';
8080                 }
8081         } elsif (defined $file_name) {
8082                 $title .= " - $file_name";
8083                 $feed_type = 'history';
8084         }
8085         $title .= " $feed_type";
8086         $title = esc_html($title);
8087         my $descr = git_get_project_description($project);
8088         if (defined $descr) {
8089                 $descr = esc_html($descr);
8090         } else {
8091                 $descr = "$project " .
8092                          ($format eq 'rss' ? 'RSS' : 'Atom') .
8093                          " feed";
8094         }
8095         my $owner = git_get_project_owner($project);
8096         $owner = esc_html($owner);
8097
8098         #header
8099         my $alt_url;
8100         if (defined $file_name) {
8101                 $alt_url = href(-full=>1, action=>"history", hash=>$hash, file_name=>$file_name);
8102         } elsif (defined $hash) {
8103                 $alt_url = href(-full=>1, action=>"log", hash=>$hash);
8104         } else {
8105                 $alt_url = href(-full=>1, action=>"summary");
8106         }
8107         print qq!<?xml version="1.0" encoding="utf-8"?>\n!;
8108         if ($format eq 'rss') {
8109                 print <<XML;
8110 <rss version="2.0" xmlns:content="http://purl.org/rss/1.0/modules/content/">
8111 <channel>
8112 XML
8113                 print "<title>$title</title>\n" .
8114                       "<link>$alt_url</link>\n" .
8115                       "<description>$descr</description>\n" .
8116                       "<language>en</language>\n" .
8117                       # project owner is responsible for 'editorial' content
8118                       "<managingEditor>$owner</managingEditor>\n";
8119                 if (defined $logo || defined $favicon) {
8120                         # prefer the logo to the favicon, since RSS
8121                         # doesn't allow both
8122                         my $img = esc_url($logo || $favicon);
8123                         print "<image>\n" .
8124                               "<url>$img</url>\n" .
8125                               "<title>$title</title>\n" .
8126                               "<link>$alt_url</link>\n" .
8127                               "</image>\n";
8128                 }
8129                 if (%latest_date) {
8130                         print "<pubDate>$latest_date{'rfc2822'}</pubDate>\n";
8131                         print "<lastBuildDate>$latest_date{'rfc2822'}</lastBuildDate>\n";
8132                 }
8133                 print "<generator>gitweb v.$version/$git_version</generator>\n";
8134         } elsif ($format eq 'atom') {
8135                 print <<XML;
8136 <feed xmlns="http://www.w3.org/2005/Atom">
8137 XML
8138                 print "<title>$title</title>\n" .
8139                       "<subtitle>$descr</subtitle>\n" .
8140                       '<link rel="alternate" type="text/html" href="' .
8141                       $alt_url . '" />' . "\n" .
8142                       '<link rel="self" type="' . $content_type . '" href="' .
8143                       $cgi->self_url() . '" />' . "\n" .
8144                       "<id>" . href(-full=>1) . "</id>\n" .
8145                       # use project owner for feed author
8146                       "<author><name>$owner</name></author>\n";
8147                 if (defined $favicon) {
8148                         print "<icon>" . esc_url($favicon) . "</icon>\n";
8149                 }
8150                 if (defined $logo) {
8151                         # not twice as wide as tall: 72 x 27 pixels
8152                         print "<logo>" . esc_url($logo) . "</logo>\n";
8153                 }
8154                 if (! %latest_date) {
8155                         # dummy date to keep the feed valid until commits trickle in:
8156                         print "<updated>1970-01-01T00:00:00Z</updated>\n";
8157                 } else {
8158                         print "<updated>$latest_date{'iso-8601'}</updated>\n";
8159                 }
8160                 print "<generator version='$version/$git_version'>gitweb</generator>\n";
8161         }
8162
8163         # contents
8164         for (my $i = 0; $i <= $#commitlist; $i++) {
8165                 my %co = %{$commitlist[$i]};
8166                 my $commit = $co{'id'};
8167                 # we read 150, we always show 30 and the ones more recent than 48 hours
8168                 if (($i >= 20) && ((time - $co{'author_epoch'}) > 48*60*60)) {
8169                         last;
8170                 }
8171                 my %cd = parse_date($co{'author_epoch'}, $co{'author_tz'});
8172
8173                 # get list of changed files
8174                 open my $fd, "-|", git_cmd(), "diff-tree", '-r', @diff_opts,
8175                         $co{'parent'} || "--root",
8176                         $co{'id'}, "--", (defined $file_name ? $file_name : ())
8177                         or next;
8178                 my @difftree = map { chomp; $_ } <$fd>;
8179                 close $fd
8180                         or next;
8181
8182                 # print element (entry, item)
8183                 my $co_url = href(-full=>1, action=>"commitdiff", hash=>$commit);
8184                 if ($format eq 'rss') {
8185                         print "<item>\n" .
8186                               "<title>" . esc_html($co{'title'}) . "</title>\n" .
8187                               "<author>" . esc_html($co{'author'}) . "</author>\n" .
8188                               "<pubDate>$cd{'rfc2822'}</pubDate>\n" .
8189                               "<guid isPermaLink=\"true\">$co_url</guid>\n" .
8190                               "<link>$co_url</link>\n" .
8191                               "<description>" . esc_html($co{'title'}) . "</description>\n" .
8192                               "<content:encoded>" .
8193                               "<![CDATA[\n";
8194                 } elsif ($format eq 'atom') {
8195                         print "<entry>\n" .
8196                               "<title type=\"html\">" . esc_html($co{'title'}) . "</title>\n" .
8197                               "<updated>$cd{'iso-8601'}</updated>\n" .
8198                               "<author>\n" .
8199                               "  <name>" . esc_html($co{'author_name'}) . "</name>\n";
8200                         if ($co{'author_email'}) {
8201                                 print "  <email>" . esc_html($co{'author_email'}) . "</email>\n";
8202                         }
8203                         print "</author>\n" .
8204                               # use committer for contributor
8205                               "<contributor>\n" .
8206                               "  <name>" . esc_html($co{'committer_name'}) . "</name>\n";
8207                         if ($co{'committer_email'}) {
8208                                 print "  <email>" . esc_html($co{'committer_email'}) . "</email>\n";
8209                         }
8210                         print "</contributor>\n" .
8211                               "<published>$cd{'iso-8601'}</published>\n" .
8212                               "<link rel=\"alternate\" type=\"text/html\" href=\"$co_url\" />\n" .
8213                               "<id>$co_url</id>\n" .
8214                               "<content type=\"xhtml\" xml:base=\"" . esc_url($my_url) . "\">\n" .
8215                               "<div xmlns=\"http://www.w3.org/1999/xhtml\">\n";
8216                 }
8217                 my $comment = $co{'comment'};
8218                 print "<pre>\n";
8219                 foreach my $line (@$comment) {
8220                         $line = esc_html($line);
8221                         print "$line\n";
8222                 }
8223                 print "</pre><ul>\n";
8224                 foreach my $difftree_line (@difftree) {
8225                         my %difftree = parse_difftree_raw_line($difftree_line);
8226                         next if !$difftree{'from_id'};
8227
8228                         my $file = $difftree{'file'} || $difftree{'to_file'};
8229
8230                         print "<li>" .
8231                               "[" .
8232                               $cgi->a({-href => href(-full=>1, action=>"blobdiff",
8233                                                      hash=>$difftree{'to_id'}, hash_parent=>$difftree{'from_id'},
8234                                                      hash_base=>$co{'id'}, hash_parent_base=>$co{'parent'},
8235                                                      file_name=>$file, file_parent=>$difftree{'from_file'}),
8236                                       -title => "diff"}, 'D');
8237                         if ($have_blame) {
8238                                 print $cgi->a({-href => href(-full=>1, action=>"blame",
8239                                                              file_name=>$file, hash_base=>$commit),
8240                                               -title => "blame"}, 'B');
8241                         }
8242                         # if this is not a feed of a file history
8243                         if (!defined $file_name || $file_name ne $file) {
8244                                 print $cgi->a({-href => href(-full=>1, action=>"history",
8245                                                              file_name=>$file, hash=>$commit),
8246                                               -title => "history"}, 'H');
8247                         }
8248                         $file = esc_path($file);
8249                         print "] ".
8250                               "$file</li>\n";
8251                 }
8252                 if ($format eq 'rss') {
8253                         print "</ul>]]>\n" .
8254                               "</content:encoded>\n" .
8255                               "</item>\n";
8256                 } elsif ($format eq 'atom') {
8257                         print "</ul>\n</div>\n" .
8258                               "</content>\n" .
8259                               "</entry>\n";
8260                 }
8261         }
8262
8263         # end of feed
8264         if ($format eq 'rss') {
8265                 print "</channel>\n</rss>\n";
8266         } elsif ($format eq 'atom') {
8267                 print "</feed>\n";
8268         }
8269 }
8270
8271 sub git_rss {
8272         git_feed('rss');
8273 }
8274
8275 sub git_atom {
8276         git_feed('atom');
8277 }
8278
8279 sub git_opml {
8280         my @list = git_get_projects_list($project_filter, $strict_export);
8281         if (!@list) {
8282                 die_error(404, "No projects found");
8283         }
8284
8285         print $cgi->header(
8286                 -type => 'text/xml',
8287                 -charset => 'utf-8',
8288                 -content_disposition => 'inline; filename="opml.xml"');
8289
8290         my $title = esc_html($site_name);
8291         my $filter = " within subdirectory ";
8292         if (defined $project_filter) {
8293                 $filter .= esc_html($project_filter);
8294         } else {
8295                 $filter = "";
8296         }
8297         print <<XML;
8298 <?xml version="1.0" encoding="utf-8"?>
8299 <opml version="1.0">
8300 <head>
8301   <title>$title OPML Export$filter</title>
8302 </head>
8303 <body>
8304 <outline text="git RSS feeds">
8305 XML
8306
8307         foreach my $pr (@list) {
8308                 my %proj = %$pr;
8309                 my $head = git_get_head_hash($proj{'path'});
8310                 if (!defined $head) {
8311                         next;
8312                 }
8313                 $git_dir = "$projectroot/$proj{'path'}";
8314                 my %co = parse_commit($head);
8315                 if (!%co) {
8316                         next;
8317                 }
8318
8319                 my $path = esc_html(chop_str($proj{'path'}, 25, 5));
8320                 my $rss  = href('project' => $proj{'path'}, 'action' => 'rss', -full => 1);
8321                 my $html = href('project' => $proj{'path'}, 'action' => 'summary', -full => 1);
8322                 print "<outline type=\"rss\" text=\"$path\" title=\"$path\" xmlUrl=\"$rss\" htmlUrl=\"$html\"/>\n";
8323         }
8324         print <<XML;
8325 </outline>
8326 </body>
8327 </opml>
8328 XML
8329 }