gitweb/gitweb.perl

   1 #!/usr/bin/perl
   2
   3 # gitweb - simple web interface to track changes in git repositories
   4 #
   5 # (C) 2005-2006, Kay Sievers <kay.sievers@vrfy.org>
   6 # (C) 2005, Christian Gierke
   7 #
   8 # This program is licensed under the GPLv2
   9
  10 use 5.008;
  11 use strict;
  12 use warnings;
  13 use CGI qw(:standard :escapeHTML -nosticky);
  14 use CGI::Util qw(unescape);
  15 use CGI::Carp qw(fatalsToBrowser set_message);
  16 use Encode;
  17 use Fcntl ':mode';
  18 use File::Find qw();
  19 use File::Basename qw(basename);
  20 use Time::HiRes qw(gettimeofday tv_interval);
  21 binmode STDOUT, ':utf8';
  22
  23 if (!defined($CGI::VERSION) || $CGI::VERSION < 4.08) {
  24         eval 'sub CGI::multi_param { CGI::param(@_) }'
  25 }
  26
  27 our $t0 = [ gettimeofday() ];
  28 our $number_of_git_cmds = 0;
  29
  30 BEGIN {
  31         CGI->compile() if $ENV{'MOD_PERL'};
  32 }
  33
  34 our $version = "++GIT_VERSION++";
  35
  36 our ($my_url, $my_uri, $base_url, $path_info, $home_link);
  37 sub evaluate_uri {
  38         our $cgi;
  39
  40         our $my_url = $cgi->url();
  41         our $my_uri = $cgi->url(-absolute => 1);
  42
  43         # Base URL for relative URLs in gitweb ($logo, $favicon, ...),
  44         # needed and used only for URLs with nonempty PATH_INFO
  45         our $base_url = $my_url;
  46
  47         # When the script is used as DirectoryIndex, the URL does not contain the name
  48         # of the script file itself, and $cgi->url() fails to strip PATH_INFO, so we
  49         # have to do it ourselves. We make $path_info global because it's also used
  50         # later on.
  51         #
  52         # Another issue with the script being the DirectoryIndex is that the resulting
  53         # $my_url data is not the full script URL: this is good, because we want
  54         # generated links to keep implying the script name if it wasn't explicitly
  55         # indicated in the URL we're handling, but it means that $my_url cannot be used
  56         # as base URL.
  57         # Therefore, if we needed to strip PATH_INFO, then we know that we have
  58         # to build the base URL ourselves:
  59         our $path_info = decode_utf8($ENV{"PATH_INFO"});
  60         if ($path_info) {
  61                 # $path_info has already been URL-decoded by the web server, but
  62                 # $my_url and $my_uri have not. URL-decode them so we can properly
  63                 # strip $path_info.
  64                 $my_url = unescape($my_url);
  65                 $my_uri = unescape($my_uri);
  66                 if ($my_url =~ s,\Q$path_info\E$,, &&
  67                     $my_uri =~ s,\Q$path_info\E$,, &&
  68                     defined $ENV{'SCRIPT_NAME'}) {
  69                         $base_url = $cgi->url(-base => 1) . $ENV{'SCRIPT_NAME'};
  70                 }
  71         }
  72
  73         # target of the home link on top of all pages
  74         our $home_link = $my_uri || "/";
  75 }
  76
  77 # core git executable to use
  78 # this can just be "git" if your webserver has a sensible PATH
  79 our $GIT = "++GIT_BINDIR++/git";
  80
  81 # absolute fs-path which will be prepended to the project path
  82 #our $projectroot = "/pub/scm";
  83 our $projectroot = "++GITWEB_PROJECTROOT++";
  84
  85 # fs traversing limit for getting project list
  86 # the number is relative to the projectroot
  87 our $project_maxdepth = "++GITWEB_PROJECT_MAXDEPTH++";
  88
  89 # string of the home link on top of all pages
  90 our $home_link_str = "++GITWEB_HOME_LINK_STR++";
  91
  92 # extra breadcrumbs preceding the home link
  93 our @extra_breadcrumbs = ();
  94
  95 # name of your site or organization to appear in page titles
  96 # replace this with something more descriptive for clearer bookmarks
  97 our $site_name = "++GITWEB_SITENAME++"
  98                  || ($ENV{'SERVER_NAME'} || "Untitled") . " Git";
  99
 100 # html snippet to include in the <head> section of each page
 101 our $site_html_head_string = "++GITWEB_SITE_HTML_HEAD_STRING++";
 102 # filename of html text to include at top of each page
 103 our $site_header = "++GITWEB_SITE_HEADER++";
 104 # html text to include at home page
 105 our $home_text = "++GITWEB_HOMETEXT++";
 106 # filename of html text to include at bottom of each page
 107 our $site_footer = "++GITWEB_SITE_FOOTER++";
 108
 109 # URI of stylesheets
 110 our @stylesheets = ("++GITWEB_CSS++");
 111 # URI of a single stylesheet, which can be overridden in GITWEB_CONFIG.
 112 our $stylesheet = undef;
 113 # URI of GIT logo (72x27 size)
 114 our $logo = "++GITWEB_LOGO++";
 115 # URI of GIT favicon, assumed to be image/png type
 116 our $favicon = "++GITWEB_FAVICON++";
 117 # URI of gitweb.js (JavaScript code for gitweb)
 118 our $javascript = "++GITWEB_JS++";
 119
 120 # URI and label (title) of GIT logo link
 121 #our $logo_url = "http://www.kernel.org/pub/software/scm/git/docs/";
 122 #our $logo_label = "git documentation";
 123 our $logo_url = "http://git-scm.com/";
 124 our $logo_label = "git homepage";
 125
 126 # source of projects list
 127 our $projects_list = "++GITWEB_LIST++";
 128
 129 # the width (in characters) of the projects list "Description" column
 130 our $projects_list_description_width = 25;
 131
 132 # group projects by category on the projects list
 133 # (enabled if this variable evaluates to true)
 134 our $projects_list_group_categories = 0;
 135
 136 # default category if none specified
 137 # (leave the empty string for no category)
 138 our $project_list_default_category = "";
 139
 140 # default order of projects list
 141 # valid values are none, project, descr, owner, and age
 142 our $default_projects_order = "project";
 143
 144 # show repository only if this file exists
 145 # (only effective if this variable evaluates to true)
 146 our $export_ok = "++GITWEB_EXPORT_OK++";
 147
 148 # don't generate age column on the projects list page
 149 our $omit_age_column = 0;
 150
 151 # don't generate information about owners of repositories
 152 our $omit_owner=0;
 153
 154 # show repository only if this subroutine returns true
 155 # when given the path to the project, for example:
 156 #    sub { return -e "$_[0]/git-daemon-export-ok"; }
 157 our $export_auth_hook = undef;
 158
 159 # only allow viewing of repositories also shown on the overview page
 160 our $strict_export = "++GITWEB_STRICT_EXPORT++";
 161
 162 # list of git base URLs used for URL to where fetch project from,
 163 # i.e. full URL is "$git_base_url/$project"
 164 our @git_base_url_list = grep { $_ ne '' } ("++GITWEB_BASE_URL++");
 165
 166 # default blob_plain mimetype and default charset for text/plain blob
 167 our $default_blob_plain_mimetype = 'text/plain';
 168 our $default_text_plain_charset  = undef;
 169
 170 # file to use for guessing MIME types before trying /etc/mime.types
 171 # (relative to the current git repository)
 172 our $mimetypes_file = undef;
 173
 174 # assume this charset if line contains non-UTF-8 characters;
 175 # it should be valid encoding (see Encoding::Supported(3pm) for list),
 176 # for which encoding all byte sequences are valid, for example
 177 # 'iso-8859-1' aka 'latin1' (it is decoded without checking, so it
 178 # could be even 'utf-8' for the old behavior)
 179 our $fallback_encoding = 'latin1';
 180
 181 # rename detection options for git-diff and git-diff-tree
 182 # - default is '-M', with the cost proportional to
 183 #   (number of removed files) * (number of new files).
 184 # - more costly is '-C' (which implies '-M'), with the cost proportional to
 185 #   (number of changed files + number of removed files) * (number of new files)
 186 # - even more costly is '-C', '--find-copies-harder' with cost
 187 #   (number of files in the original tree) * (number of new files)
 188 # - one might want to include '-B' option, e.g. '-B', '-M'
 189 our @diff_opts = ('-M'); # taken from git_commit
 190
 191 # Disables features that would allow repository owners to inject script into
 192 # the gitweb domain.
 193 our $prevent_xss = 0;
 194
 195 # Path to the highlight executable to use (must be the one from
 196 # http://www.andre-simon.de due to assumptions about parameters and output).
 197 # Useful if highlight is not installed on your webserver's PATH.
 198 # [Default: highlight]
 199 our $highlight_bin = "++HIGHLIGHT_BIN++";
 200
 201 # information about snapshot formats that gitweb is capable of serving
 202 our %known_snapshot_formats = (
 203         # name => {
 204         #       'display' => display name,
 205         #       'type' => mime type,
 206         #       'suffix' => filename suffix,
 207         #       'format' => --format for git-archive,
 208         #       'compressor' => [compressor command and arguments]
 209         #                       (array reference, optional)
 210         #       'disabled' => boolean (optional)}
 211         #
 212         'tgz' => {
 213                 'display' => 'tar.gz',
 214                 'type' => 'application/x-gzip',
 215                 'suffix' => '.tar.gz',
 216                 'format' => 'tar',
 217                 'compressor' => ['gzip', '-n']},
 218
 219         'tbz2' => {
 220                 'display' => 'tar.bz2',
 221                 'type' => 'application/x-bzip2',
 222                 'suffix' => '.tar.bz2',
 223                 'format' => 'tar',
 224                 'compressor' => ['bzip2']},
 225
 226         'txz' => {
 227                 'display' => 'tar.xz',
 228                 'type' => 'application/x-xz',
 229                 'suffix' => '.tar.xz',
 230                 'format' => 'tar',
 231                 'compressor' => ['xz'],
 232                 'disabled' => 1},
 233
 234         'zip' => {
 235                 'display' => 'zip',
 236                 'type' => 'application/x-zip',
 237                 'suffix' => '.zip',
 238                 'format' => 'zip'},
 239 );
 240
 241 # Aliases so we understand old gitweb.snapshot values in repository
 242 # configuration.
 243 our %known_snapshot_format_aliases = (
 244         'gzip'  => 'tgz',
 245         'bzip2' => 'tbz2',
 246         'xz'    => 'txz',
 247
 248         # backward compatibility: legacy gitweb config support
 249         'x-gzip' => undef, 'gz' => undef,
 250         'x-bzip2' => undef, 'bz2' => undef,
 251         'x-zip' => undef, '' => undef,
 252 );
 253
 254 # Pixel sizes for icons and avatars. If the default font sizes or lineheights
 255 # are changed, it may be appropriate to change these values too via
 256 # $GITWEB_CONFIG.
 257 our %avatar_size = (
 258         'default' => 16,
 259         'double'  => 32
 260 );
 261
 262 # Used to set the maximum load that we will still respond to gitweb queries.
 263 # If server load exceed this value then return "503 server busy" error.
 264 # If gitweb cannot determined server load, it is taken to be 0.
 265 # Leave it undefined (or set to 'undef') to turn off load checking.
 266 our $maxload = 300;
 267
 268 # configuration for 'highlight' (http://www.andre-simon.de/)
 269 # match by basename
 270 our %highlight_basename = (
 271         #'Program' => 'py',
 272         #'Library' => 'py',
 273         'SConstruct' => 'py', # SCons equivalent of Makefile
 274         'Makefile' => 'make',
 275 );
 276 # match by extension
 277 our %highlight_ext = (
 278         # main extensions, defining name of syntax;
 279         # see files in /usr/share/highlight/langDefs/ directory
 280         (map { $_ => $_ } qw(py rb java css js tex bib xml awk bat ini spec tcl sql)),
 281         # alternate extensions, see /etc/highlight/filetypes.conf
 282         (map { $_ => 'c'   } qw(c h)),
 283         (map { $_ => 'sh'  } qw(sh bash zsh ksh)),
 284         (map { $_ => 'cpp' } qw(cpp cxx c++ cc)),
 285         (map { $_ => 'php' } qw(php php3 php4 php5 phps)),
 286         (map { $_ => 'pl'  } qw(pl perl pm)), # perhaps also 'cgi'
 287         (map { $_ => 'make'} qw(make mak mk)),
 288         (map { $_ => 'xml' } qw(xml xhtml html htm)),
 289 );
 290
 291 # You define site-wide feature defaults here; override them with
 292 # $GITWEB_CONFIG as necessary.
 293 our %feature = (
 294         # feature => {
 295         #       'sub' => feature-sub (subroutine),
 296         #       'override' => allow-override (boolean),
 297         #       'default' => [ default options...] (array reference)}
 298         #
 299         # if feature is overridable (it means that allow-override has true value),
 300         # then feature-sub will be called with default options as parameters;
 301         # return value of feature-sub indicates if to enable specified feature
 302         #
 303         # if there is no 'sub' key (no feature-sub), then feature cannot be
 304         # overridden
 305         #
 306         # use gitweb_get_feature(<feature>) to retrieve the <feature> value
 307         # (an array) or gitweb_check_feature(<feature>) to check if <feature>
 308         # is enabled
 309
 310         # Enable the 'blame' blob view, showing the last commit that modified
 311         # each line in the file. This can be very CPU-intensive.
 312
 313         # To enable system wide have in $GITWEB_CONFIG
 314         # $feature{'blame'}{'default'} = [1];
 315         # To have project specific config enable override in $GITWEB_CONFIG
 316         # $feature{'blame'}{'override'} = 1;
 317         # and in project config gitweb.blame = 0|1;
 318         'blame' => {
 319                 'sub' => sub { feature_bool('blame', @_) },
 320                 'override' => 0,
 321                 'default' => [0]},
 322
 323         # Enable the 'snapshot' link, providing a compressed archive of any
 324         # tree. This can potentially generate high traffic if you have large
 325         # project.
 326
 327         # Value is a list of formats defined in %known_snapshot_formats that
 328         # you wish to offer.
 329         # To disable system wide have in $GITWEB_CONFIG
 330         # $feature{'snapshot'}{'default'} = [];
 331         # To have project specific config enable override in $GITWEB_CONFIG
 332         # $feature{'snapshot'}{'override'} = 1;
 333         # and in project config, a comma-separated list of formats or "none"
 334         # to disable.  Example: gitweb.snapshot = tbz2,zip;
 335         'snapshot' => {
 336                 'sub' => \&feature_snapshot,
 337                 'override' => 0,
 338                 'default' => ['tgz']},
 339
 340         # Enable text search, which will list the commits which match author,
 341         # committer or commit text to a given string.  Enabled by default.
 342         # Project specific override is not supported.
 343         #
 344         # Note that this controls all search features, which means that if
 345         # it is disabled, then 'grep' and 'pickaxe' search would also be
 346         # disabled.
 347         'search' => {
 348                 'override' => 0,
 349                 'default' => [1]},
 350
 351         # Enable grep search, which will list the files in currently selected
 352         # tree containing the given string. Enabled by default. This can be
 353         # potentially CPU-intensive, of course.
 354         # Note that you need to have 'search' feature enabled too.
 355
 356         # To enable system wide have in $GITWEB_CONFIG
 357         # $feature{'grep'}{'default'} = [1];
 358         # To have project specific config enable override in $GITWEB_CONFIG
 359         # $feature{'grep'}{'override'} = 1;
 360         # and in project config gitweb.grep = 0|1;
 361         'grep' => {
 362                 'sub' => sub { feature_bool('grep', @_) },
 363                 'override' => 0,
 364                 'default' => [1]},
 365
 366         # Enable the pickaxe search, which will list the commits that modified
 367         # a given string in a file. This can be practical and quite faster
 368         # alternative to 'blame', but still potentially CPU-intensive.
 369         # Note that you need to have 'search' feature enabled too.
 370
 371         # To enable system wide have in $GITWEB_CONFIG
 372         # $feature{'pickaxe'}{'default'} = [1];
 373         # To have project specific config enable override in $GITWEB_CONFIG
 374         # $feature{'pickaxe'}{'override'} = 1;
 375         # and in project config gitweb.pickaxe = 0|1;
 376         'pickaxe' => {
 377                 'sub' => sub { feature_bool('pickaxe', @_) },
 378                 'override' => 0,
 379                 'default' => [1]},
 380
 381         # Enable showing size of blobs in a 'tree' view, in a separate
 382         # column, similar to what 'ls -l' does.  This cost a bit of IO.
 383
 384         # To disable system wide have in $GITWEB_CONFIG
 385         # $feature{'show-sizes'}{'default'} = [0];
 386         # To have project specific config enable override in $GITWEB_CONFIG
 387         # $feature{'show-sizes'}{'override'} = 1;
 388         # and in project config gitweb.showsizes = 0|1;
 389         'show-sizes' => {
 390                 'sub' => sub { feature_bool('showsizes', @_) },
 391                 'override' => 0,
 392                 'default' => [1]},
 393
 394         # Make gitweb use an alternative format of the URLs which can be
 395         # more readable and natural-looking: project name is embedded
 396         # directly in the path and the query string contains other
 397         # auxiliary information. All gitweb installations recognize
 398         # URL in either format; this configures in which formats gitweb
 399         # generates links.
 400
 401         # To enable system wide have in $GITWEB_CONFIG
 402         # $feature{'pathinfo'}{'default'} = [1];
 403         # Project specific override is not supported.
 404
 405         # Note that you will need to change the default location of CSS,
 406         # favicon, logo and possibly other files to an absolute URL. Also,
 407         # if gitweb.cgi serves as your indexfile, you will need to force
 408         # $my_uri to contain the script name in your $GITWEB_CONFIG.
 409         'pathinfo' => {
 410                 'override' => 0,
 411                 'default' => [0]},
 412
 413         # Make gitweb consider projects in project root subdirectories
 414         # to be forks of existing projects. Given project $projname.git,
 415         # projects matching $projname/*.git will not be shown in the main
 416         # projects list, instead a '+' mark will be added to $projname
 417         # there and a 'forks' view will be enabled for the project, listing
 418         # all the forks. If project list is taken from a file, forks have
 419         # to be listed after the main project.
 420
 421         # To enable system wide have in $GITWEB_CONFIG
 422         # $feature{'forks'}{'default'} = [1];
 423         # Project specific override is not supported.
 424         'forks' => {
 425                 'override' => 0,
 426                 'default' => [0]},
 427
 428         # Insert custom links to the action bar of all project pages.
 429         # This enables you mainly to link to third-party scripts integrating
 430         # into gitweb; e.g. git-browser for graphical history representation
 431         # or custom web-based repository administration interface.
 432
 433         # The 'default' value consists of a list of triplets in the form
 434         # (label, link, position) where position is the label after which
 435         # to insert the link and link is a format string where %n expands
 436         # to the project name, %f to the project path within the filesystem,
 437         # %h to the current hash (h gitweb parameter) and %b to the current
 438         # hash base (hb gitweb parameter); %% expands to %.
 439
 440         # To enable system wide have in $GITWEB_CONFIG e.g.
 441         # $feature{'actions'}{'default'} = [('graphiclog',
 442         #       '/git-browser/by-commit.html?r=%n', 'summary')];
 443         # Project specific override is not supported.
 444         'actions' => {
 445                 'override' => 0,
 446                 'default' => []},
 447
 448         # Allow gitweb scan project content tags of project repository,
 449         # and display the popular Web 2.0-ish "tag cloud" near the projects
 450         # list.  Note that this is something COMPLETELY different from the
 451         # normal Git tags.
 452
 453         # gitweb by itself can show existing tags, but it does not handle
 454         # tagging itself; you need to do it externally, outside gitweb.
 455         # The format is described in git_get_project_ctags() subroutine.
 456         # You may want to install the HTML::TagCloud Perl module to get
 457         # a pretty tag cloud instead of just a list of tags.
 458
 459         # To enable system wide have in $GITWEB_CONFIG
 460         # $feature{'ctags'}{'default'} = [1];
 461         # Project specific override is not supported.
 462
 463         # In the future whether ctags editing is enabled might depend
 464         # on the value, but using 1 should always mean no editing of ctags.
 465         'ctags' => {
 466                 'override' => 0,
 467                 'default' => [0]},
 468
 469         # The maximum number of patches in a patchset generated in patch
 470         # view. Set this to 0 or undef to disable patch view, or to a
 471         # negative number to remove any limit.
 472
 473         # To disable system wide have in $GITWEB_CONFIG
 474         # $feature{'patches'}{'default'} = [0];
 475         # To have project specific config enable override in $GITWEB_CONFIG
 476         # $feature{'patches'}{'override'} = 1;
 477         # and in project config gitweb.patches = 0|n;
 478         # where n is the maximum number of patches allowed in a patchset.
 479         'patches' => {
 480                 'sub' => \&feature_patches,
 481                 'override' => 0,
 482                 'default' => [16]},
 483
 484         # Avatar support. When this feature is enabled, views such as
 485         # shortlog or commit will display an avatar associated with
 486         # the email of the committer(s) and/or author(s).
 487
 488         # Currently available providers are gravatar and picon.
 489         # If an unknown provider is specified, the feature is disabled.
 490
 491         # Gravatar depends on Digest::MD5.
 492         # Picon currently relies on the indiana.edu database.
 493
 494         # To enable system wide have in $GITWEB_CONFIG
 495         # $feature{'avatar'}{'default'} = ['<provider>'];
 496         # where <provider> is either gravatar or picon.
 497         # To have project specific config enable override in $GITWEB_CONFIG
 498         # $feature{'avatar'}{'override'} = 1;
 499         # and in project config gitweb.avatar = <provider>;
 500         'avatar' => {
 501                 'sub' => \&feature_avatar,
 502                 'override' => 0,
 503                 'default' => ['']},
 504
 505         # Enable displaying how much time and how many git commands
 506         # it took to generate and display page.  Disabled by default.
 507         # Project specific override is not supported.
 508         'timed' => {
 509                 'override' => 0,
 510                 'default' => [0]},
 511
 512         # Enable turning some links into links to actions which require
 513         # JavaScript to run (like 'blame_incremental').  Not enabled by
 514         # default.  Project specific override is currently not supported.
 515         'javascript-actions' => {
 516                 'override' => 0,
 517                 'default' => [0]},
 518
 519         # Enable and configure ability to change common timezone for dates
 520         # in gitweb output via JavaScript.  Enabled by default.
 521         # Project specific override is not supported.
 522         'javascript-timezone' => {
 523                 'override' => 0,
 524                 'default' => [
 525                         'local',     # default timezone: 'utc', 'local', or '(-|+)HHMM' format,
 526                                      # or undef to turn off this feature
 527                         'gitweb_tz', # name of cookie where to store selected timezone
 528                         'datetime',  # CSS class used to mark up dates for manipulation
 529                 ]},
 530
 531         # Syntax highlighting support. This is based on Daniel Svensson's
 532         # and Sham Chukoury's work in gitweb-xmms2.git.
 533         # It requires the 'highlight' program present in $PATH,
 534         # and therefore is disabled by default.
 535
 536         # To enable system wide have in $GITWEB_CONFIG
 537         # $feature{'highlight'}{'default'} = [1];
 538
 539         'highlight' => {
 540                 'sub' => sub { feature_bool('highlight', @_) },
 541                 'override' => 0,
 542                 'default' => [0]},
 543
 544         # Enable displaying of remote heads in the heads list
 545
 546         # To enable system wide have in $GITWEB_CONFIG
 547         # $feature{'remote_heads'}{'default'} = [1];
 548         # To have project specific config enable override in $GITWEB_CONFIG
 549         # $feature{'remote_heads'}{'override'} = 1;
 550         # and in project config gitweb.remoteheads = 0|1;
 551         'remote_heads' => {
 552                 'sub' => sub { feature_bool('remote_heads', @_) },
 553                 'override' => 0,
 554                 'default' => [0]},
 555
 556         # Enable showing branches under other refs in addition to heads
 557
 558         # To set system wide extra branch refs have in $GITWEB_CONFIG
 559         # $feature{'extra-branch-refs'}{'default'} = ['dirs', 'of', 'choice'];
 560         # To have project specific config enable override in $GITWEB_CONFIG
 561         # $feature{'extra-branch-refs'}{'override'} = 1;
 562         # and in project config gitweb.extrabranchrefs = dirs of choice
 563         # Every directory is separated with whitespace.
 564
 565         'extra-branch-refs' => {
 566                 'sub' => \&feature_extra_branch_refs,
 567                 'override' => 0,
 568                 'default' => []},
 569 );
 570
 571 sub gitweb_get_feature {
 572         my ($name) = @_;
 573         return unless exists $feature{$name};
 574         my ($sub, $override, @defaults) = (
 575                 $feature{$name}{'sub'},
 576                 $feature{$name}{'override'},
 577                 @{$feature{$name}{'default'}});
 578         # project specific override is possible only if we have project
 579         our $git_dir; # global variable, declared later
 580         if (!$override || !defined $git_dir) {
 581                 return @defaults;
 582         }
 583         if (!defined $sub) {
 584                 warn "feature $name is not overridable";
 585                 return @defaults;
 586         }
 587         return $sub->(@defaults);
 588 }
 589
 590 # A wrapper to check if a given feature is enabled.
 591 # With this, you can say
 592 #
 593 #   my $bool_feat = gitweb_check_feature('bool_feat');
 594 #   gitweb_check_feature('bool_feat') or somecode;
 595 #
 596 # instead of
 597 #
 598 #   my ($bool_feat) = gitweb_get_feature('bool_feat');
 599 #   (gitweb_get_feature('bool_feat'))[0] or somecode;
 600 #
 601 sub gitweb_check_feature {
 602         return (gitweb_get_feature(@_))[0];
 603 }
 604
 605
 606 sub feature_bool {
 607         my $key = shift;
 608         my ($val) = git_get_project_config($key, '--bool');
 609
 610         if (!defined $val) {
 611                 return ($_[0]);
 612         } elsif ($val eq 'true') {
 613                 return (1);
 614         } elsif ($val eq 'false') {
 615                 return (0);
 616         }
 617 }
 618
 619 sub feature_snapshot {
 620         my (@fmts) = @_;
 621
 622         my ($val) = git_get_project_config('snapshot');
 623
 624         if ($val) {
 625                 @fmts = ($val eq 'none' ? () : split /\s*[,\s]\s*/, $val);
 626         }
 627
 628         return @fmts;
 629 }
 630
 631 sub feature_patches {
 632         my @val = (git_get_project_config('patches', '--int'));
 633
 634         if (@val) {
 635                 return @val;
 636         }
 637
 638         return ($_[0]);
 639 }
 640
 641 sub feature_avatar {
 642         my @val = (git_get_project_config('avatar'));
 643
 644         return @val ? @val : @_;
 645 }
 646
 647 sub feature_extra_branch_refs {
 648         my (@branch_refs) = @_;
 649         my $values = git_get_project_config('extrabranchrefs');
 650
 651         if ($values) {
 652                 $values = config_to_multi ($values);
 653                 @branch_refs = ();
 654                 foreach my $value (@{$values}) {
 655                         push @branch_refs, split /\s+/, $value;
 656                 }
 657         }
 658
 659         return @branch_refs;
 660 }
 661
 662 # checking HEAD file with -e is fragile if the repository was
 663 # initialized long time ago (i.e. symlink HEAD) and was pack-ref'ed
 664 # and then pruned.
 665 sub check_head_link {
 666         my ($dir) = @_;
 667         my $headfile = "$dir/HEAD";
 668         return ((-e $headfile) ||
 669                 (-l $headfile && readlink($headfile) =~ /^refs\/heads\//));
 670 }
 671
 672 sub check_export_ok {
 673         my ($dir) = @_;
 674         return (check_head_link($dir) &&
 675                 (!$export_ok || -e "$dir/$export_ok") &&
 676                 (!$export_auth_hook || $export_auth_hook->($dir)));
 677 }
 678
 679 # process alternate names for backward compatibility
 680 # filter out unsupported (unknown) snapshot formats
 681 sub filter_snapshot_fmts {
 682         my @fmts = @_;
 683
 684         @fmts = map {
 685                 exists $known_snapshot_format_aliases{$_} ?
 686                        $known_snapshot_format_aliases{$_} : $_} @fmts;
 687         @fmts = grep {
 688                 exists $known_snapshot_formats{$_} &&
 689                 !$known_snapshot_formats{$_}{'disabled'}} @fmts;
 690 }
 691
 692 sub filter_and_validate_refs {
 693         my @refs = @_;
 694         my %unique_refs = ();
 695
 696         foreach my $ref (@refs) {
 697                 die_error(500, "Invalid ref '$ref' in 'extra-branch-refs' feature") unless (is_valid_ref_format($ref));
 698                 # 'heads' are added implicitly in get_branch_refs().
 699                 $unique_refs{$ref} = 1 if ($ref ne 'heads');
 700         }
 701         return sort keys %unique_refs;
 702 }
 703
 704 # If it is set to code reference, it is code that it is to be run once per
 705 # request, allowing updating configurations that change with each request,
 706 # while running other code in config file only once.
 707 #
 708 # Otherwise, if it is false then gitweb would process config file only once;
 709 # if it is true then gitweb config would be run for each request.
 710 our $per_request_config = 1;
 711
 712 # read and parse gitweb config file given by its parameter.
 713 # returns true on success, false on recoverable error, allowing
 714 # to chain this subroutine, using first file that exists.
 715 # dies on errors during parsing config file, as it is unrecoverable.
 716 sub read_config_file {
 717         my $filename = shift;
 718         return unless defined $filename;
 719         # die if there are errors parsing config file
 720         if (-e $filename) {
 721                 do $filename;
 722                 die $@ if $@;
 723                 return 1;
 724         }
 725         return;
 726 }
 727
 728 our ($GITWEB_CONFIG, $GITWEB_CONFIG_SYSTEM, $GITWEB_CONFIG_COMMON);
 729 sub evaluate_gitweb_config {
 730         our $GITWEB_CONFIG = $ENV{'GITWEB_CONFIG'} || "++GITWEB_CONFIG++";
 731         our $GITWEB_CONFIG_SYSTEM = $ENV{'GITWEB_CONFIG_SYSTEM'} || "++GITWEB_CONFIG_SYSTEM++";
 732         our $GITWEB_CONFIG_COMMON = $ENV{'GITWEB_CONFIG_COMMON'} || "++GITWEB_CONFIG_COMMON++";
 733
 734         # Protect against duplications of file names, to not read config twice.
 735         # Only one of $GITWEB_CONFIG and $GITWEB_CONFIG_SYSTEM is used, so
 736         # there possibility of duplication of filename there doesn't matter.
 737         $GITWEB_CONFIG = ""        if ($GITWEB_CONFIG eq $GITWEB_CONFIG_COMMON);
 738         $GITWEB_CONFIG_SYSTEM = "" if ($GITWEB_CONFIG_SYSTEM eq $GITWEB_CONFIG_COMMON);
 739
 740         # Common system-wide settings for convenience.
 741         # Those settings can be ovverriden by GITWEB_CONFIG or GITWEB_CONFIG_SYSTEM.
 742         read_config_file($GITWEB_CONFIG_COMMON);
 743
 744         # Use first config file that exists.  This means use the per-instance
 745         # GITWEB_CONFIG if exists, otherwise use GITWEB_SYSTEM_CONFIG.
 746         read_config_file($GITWEB_CONFIG) and return;
 747         read_config_file($GITWEB_CONFIG_SYSTEM);
 748 }
 749
 750 # Get loadavg of system, to compare against $maxload.
 751 # Currently it requires '/proc/loadavg' present to get loadavg;
 752 # if it is not present it returns 0, which means no load checking.
 753 sub get_loadavg {
 754         if( -e '/proc/loadavg' ){
 755                 open my $fd, '<', '/proc/loadavg'
 756                         or return 0;
 757                 my @load = split(/\s+/, scalar <$fd>);
 758                 close $fd;
 759
 760                 # The first three columns measure CPU and IO utilization of the last one,
 761                 # five, and 10 minute periods.  The fourth column shows the number of
 762                 # currently running processes and the total number of processes in the m/n
 763                 # format.  The last column displays the last process ID used.
 764                 return $load[0] || 0;
 765         }
 766         # additional checks for load average should go here for things that don't export
 767         # /proc/loadavg
 768
 769         return 0;
 770 }
 771
 772 # version of the core git binary
 773 our $git_version;
 774 sub evaluate_git_version {
 775         our $git_version = qx("$GIT" --version) =~ m/git version (.*)$/ ? $1 : "unknown";
 776         $number_of_git_cmds++;
 777 }
 778
 779 sub check_loadavg {
 780         if (defined $maxload && get_loadavg() > $maxload) {
 781                 die_error(503, "The load average on the server is too high");
 782         }
 783 }
 784
 785 # ======================================================================
 786 # input validation and dispatch
 787
 788 # input parameters can be collected from a variety of sources (presently, CGI
 789 # and PATH_INFO), so we define an %input_params hash that collects them all
 790 # together during validation: this allows subsequent uses (e.g. href()) to be
 791 # agnostic of the parameter origin
 792
 793 our %input_params = ();
 794
 795 # input parameters are stored with the long parameter name as key. This will
 796 # also be used in the href subroutine to convert parameters to their CGI
 797 # equivalent, and since the href() usage is the most frequent one, we store
 798 # the name -> CGI key mapping here, instead of the reverse.
 799 #
 800 # XXX: Warning: If you touch this, check the search form for updating,
 801 # too.
 802
 803 our @cgi_param_mapping = (
 804         project => "p",
 805         action => "a",
 806         file_name => "f",
 807         file_parent => "fp",
 808         hash => "h",
 809         hash_parent => "hp",
 810         hash_base => "hb",
 811         hash_parent_base => "hpb",
 812         page => "pg",
 813         order => "o",
 814         searchtext => "s",
 815         searchtype => "st",
 816         snapshot_format => "sf",
 817         extra_options => "opt",
 818         search_use_regexp => "sr",
 819         ctag => "by_tag",
 820         diff_style => "ds",
 821         project_filter => "pf",
 822         # this must be last entry (for manipulation from JavaScript)
 823         javascript => "js"
 824 );
 825 our %cgi_param_mapping = @cgi_param_mapping;
 826
 827 # we will also need to know the possible actions, for validation
 828 our %actions = (
 829         "blame" => \&git_blame,
 830         "blame_incremental" => \&git_blame_incremental,
 831         "blame_data" => \&git_blame_data,
 832         "blobdiff" => \&git_blobdiff,
 833         "blobdiff_plain" => \&git_blobdiff_plain,
 834         "blob" => \&git_blob,
 835         "blob_plain" => \&git_blob_plain,
 836         "commitdiff" => \&git_commitdiff,
 837         "commitdiff_plain" => \&git_commitdiff_plain,
 838         "commit" => \&git_commit,
 839         "forks" => \&git_forks,
 840         "heads" => \&git_heads,
 841         "history" => \&git_history,
 842         "log" => \&git_log,
 843         "patch" => \&git_patch,
 844         "patches" => \&git_patches,
 845         "remotes" => \&git_remotes,
 846         "rss" => \&git_rss,
 847         "atom" => \&git_atom,
 848         "search" => \&git_search,
 849         "search_help" => \&git_search_help,
 850         "shortlog" => \&git_shortlog,
 851         "summary" => \&git_summary,
 852         "tag" => \&git_tag,
 853         "tags" => \&git_tags,
 854         "tree" => \&git_tree,
 855         "snapshot" => \&git_snapshot,
 856         "object" => \&git_object,
 857         # those below don't need $project
 858         "opml" => \&git_opml,
 859         "project_list" => \&git_project_list,
 860         "project_index" => \&git_project_index,
 861 );
 862
 863 # finally, we have the hash of allowed extra_options for the commands that
 864 # allow them
 865 our %allowed_options = (
 866         "--no-merges" => [ qw(rss atom log shortlog history) ],
 867 );
 868
 869 # fill %input_params with the CGI parameters. All values except for 'opt'
 870 # should be single values, but opt can be an array. We should probably
 871 # build an array of parameters that can be multi-valued, but since for the time
 872 # being it's only this one, we just single it out
 873 sub evaluate_query_params {
 874         our $cgi;
 875
 876         while (my ($name, $symbol) = each %cgi_param_mapping) {
 877                 if ($symbol eq 'opt') {
 878                         $input_params{$name} = [ map { decode_utf8($_) } $cgi->multi_param($symbol) ];
 879                 } else {
 880                         $input_params{$name} = decode_utf8($cgi->param($symbol));
 881                 }
 882         }
 883 }
 884
 885 # now read PATH_INFO and update the parameter list for missing parameters
 886 sub evaluate_path_info {
 887         return if defined $input_params{'project'};
 888         return if !$path_info;
 889         $path_info =~ s,^/+,,;
 890         return if !$path_info;
 891
 892         # find which part of PATH_INFO is project
 893         my $project = $path_info;
 894         $project =~ s,/+$,,;
 895         while ($project && !check_head_link("$projectroot/$project")) {
 896                 $project =~ s,/*[^/]*$,,;
 897         }
 898         return unless $project;
 899         $input_params{'project'} = $project;
 900
 901         # do not change any parameters if an action is given using the query string
 902         return if $input_params{'action'};
 903         $path_info =~ s,^\Q$project\E/*,,;
 904
 905         # next, check if we have an action
 906         my $action = $path_info;
 907         $action =~ s,/.*$,,;
 908         if (exists $actions{$action}) {
 909                 $path_info =~ s,^$action/*,,;
 910                 $input_params{'action'} = $action;
 911         }
 912
 913         # list of actions that want hash_base instead of hash, but can have no
 914         # pathname (f) parameter
 915         my @wants_base = (
 916                 'tree',
 917                 'history',
 918         );
 919
 920         # we want to catch, among others
 921         # [$hash_parent_base[:$file_parent]..]$hash_parent[:$file_name]
 922         my ($parentrefname, $parentpathname, $refname, $pathname) =
 923                 ($path_info =~ /^(?:(.+?)(?::(.+))?\.\.)?([^:]+?)?(?::(.+))?$/);
 924
 925         # first, analyze the 'current' part
 926         if (defined $pathname) {
 927                 # we got "branch:filename" or "branch:dir/"
 928                 # we could use git_get_type(branch:pathname), but:
 929                 # - it needs $git_dir
 930                 # - it does a git() call
 931                 # - the convention of terminating directories with a slash
 932                 #   makes it superfluous
 933                 # - embedding the action in the PATH_INFO would make it even
 934                 #   more superfluous
 935                 $pathname =~ s,^/+,,;
 936                 if (!$pathname || substr($pathname, -1) eq "/") {
 937                         $input_params{'action'} ||= "tree";
 938                         $pathname =~ s,/$,,;
 939                 } else {
 940                         # the default action depends on whether we had parent info
 941                         # or not
 942                         if ($parentrefname) {
 943                                 $input_params{'action'} ||= "blobdiff_plain";
 944                         } else {
 945                                 $input_params{'action'} ||= "blob_plain";
 946                         }
 947                 }
 948                 $input_params{'hash_base'} ||= $refname;
 949                 $input_params{'file_name'} ||= $pathname;
 950         } elsif (defined $refname) {
 951                 # we got "branch". In this case we have to choose if we have to
 952                 # set hash or hash_base.
 953                 #
 954                 # Most of the actions without a pathname only want hash to be
 955                 # set, except for the ones specified in @wants_base that want
 956                 # hash_base instead. It should also be noted that hand-crafted
 957                 # links having 'history' as an action and no pathname or hash
 958                 # set will fail, but that happens regardless of PATH_INFO.
 959                 if (defined $parentrefname) {
 960                         # if there is parent let the default be 'shortlog' action
 961                         # (for http://git.example.com/repo.git/A..B links); if there
 962                         # is no parent, dispatch will detect type of object and set
 963                         # action appropriately if required (if action is not set)
 964                         $input_params{'action'} ||= "shortlog";
 965                 }
 966                 if ($input_params{'action'} &&
 967                     grep { $_ eq $input_params{'action'} } @wants_base) {
 968                         $input_params{'hash_base'} ||= $refname;
 969                 } else {
 970                         $input_params{'hash'} ||= $refname;
 971                 }
 972         }
 973
 974         # next, handle the 'parent' part, if present
 975         if (defined $parentrefname) {
 976                 # a missing pathspec defaults to the 'current' filename, allowing e.g.
 977                 # someproject/blobdiff/oldrev..newrev:/filename
 978                 if ($parentpathname) {
 979                         $parentpathname =~ s,^/+,,;
 980                         $parentpathname =~ s,/$,,;
 981                         $input_params{'file_parent'} ||= $parentpathname;
 982                 } else {
 983                         $input_params{'file_parent'} ||= $input_params{'file_name'};
 984                 }
 985                 # we assume that hash_parent_base is wanted if a path was specified,
 986                 # or if the action wants hash_base instead of hash
 987                 if (defined $input_params{'file_parent'} ||
 988                         grep { $_ eq $input_params{'action'} } @wants_base) {
 989                         $input_params{'hash_parent_base'} ||= $parentrefname;
 990                 } else {
 991                         $input_params{'hash_parent'} ||= $parentrefname;
 992                 }
 993         }
 994
 995         # for the snapshot action, we allow URLs in the form
 996         # $project/snapshot/$hash.ext
 997         # where .ext determines the snapshot and gets removed from the
 998         # passed $refname to provide the $hash.
 999         #
1000         # To be able to tell that $refname includes the format extension, we
1001         # require the following two conditions to be satisfied:
1002         # - the hash input parameter MUST have been set from the $refname part
1003         #   of the URL (i.e. they must be equal)
1004         # - the snapshot format MUST NOT have been defined already (e.g. from
1005         #   CGI parameter sf)
1006         # It's also useless to try any matching unless $refname has a dot,
1007         # so we check for that too
1008         if (defined $input_params{'action'} &&
1009                 $input_params{'action'} eq 'snapshot' &&
1010                 defined $refname && index($refname, '.') != -1 &&
1011                 $refname eq $input_params{'hash'} &&
1012                 !defined $input_params{'snapshot_format'}) {
1013                 # We loop over the known snapshot formats, checking for
1014                 # extensions. Allowed extensions are both the defined suffix
1015                 # (which includes the initial dot already) and the snapshot
1016                 # format key itself, with a prepended dot
1017                 while (my ($fmt, $opt) = each %known_snapshot_formats) {
1018                         my $hash = $refname;
1019                         unless ($hash =~ s/(\Q$opt->{'suffix'}\E|\Q.$fmt\E)$//) {
1020                                 next;
1021                         }
1022                         my $sfx = $1;
1023                         # a valid suffix was found, so set the snapshot format
1024                         # and reset the hash parameter
1025                         $input_params{'snapshot_format'} = $fmt;
1026                         $input_params{'hash'} = $hash;
1027                         # we also set the format suffix to the one requested
1028                         # in the URL: this way a request for e.g. .tgz returns
1029                         # a .tgz instead of a .tar.gz
1030                         $known_snapshot_formats{$fmt}{'suffix'} = $sfx;
1031                         last;
1032                 }
1033         }
1034 }
1035
1036 our ($action, $project, $file_name, $file_parent, $hash, $hash_parent, $hash_base,
1037      $hash_parent_base, @extra_options, $page, $searchtype, $search_use_regexp,
1038      $searchtext, $search_regexp, $project_filter);
1039 sub evaluate_and_validate_params {
1040         our $action = $input_params{'action'};
1041         if (defined $action) {
1042                 if (!is_valid_action($action)) {
1043                         die_error(400, "Invalid action parameter");
1044                 }
1045         }
1046
1047         # parameters which are pathnames
1048         our $project = $input_params{'project'};
1049         if (defined $project) {
1050                 if (!is_valid_project($project)) {
1051                         undef $project;
1052                         die_error(404, "No such project");
1053                 }
1054         }
1055
1056         our $project_filter = $input_params{'project_filter'};
1057         if (defined $project_filter) {
1058                 if (!is_valid_pathname($project_filter)) {
1059                         die_error(404, "Invalid project_filter parameter");
1060                 }
1061         }
1062
1063         our $file_name = $input_params{'file_name'};
1064         if (defined $file_name) {
1065                 if (!is_valid_pathname($file_name)) {
1066                         die_error(400, "Invalid file parameter");
1067                 }
1068         }
1069
1070         our $file_parent = $input_params{'file_parent'};
1071         if (defined $file_parent) {
1072                 if (!is_valid_pathname($file_parent)) {
1073                         die_error(400, "Invalid file parent parameter");
1074                 }
1075         }
1076
1077         # parameters which are refnames
1078         our $hash = $input_params{'hash'};
1079         if (defined $hash) {
1080                 if (!is_valid_refname($hash)) {
1081                         die_error(400, "Invalid hash parameter");
1082                 }
1083         }
1084
1085         our $hash_parent = $input_params{'hash_parent'};
1086         if (defined $hash_parent) {
1087                 if (!is_valid_refname($hash_parent)) {
1088                         die_error(400, "Invalid hash parent parameter");
1089                 }
1090         }
1091
1092         our $hash_base = $input_params{'hash_base'};
1093         if (defined $hash_base) {
1094                 if (!is_valid_refname($hash_base)) {
1095                         die_error(400, "Invalid hash base parameter");
1096                 }
1097         }
1098
1099         our @extra_options = @{$input_params{'extra_options'}};
1100         # @extra_options is always defined, since it can only be (currently) set from
1101         # CGI, and $cgi->param() returns the empty array in array context if the param
1102         # is not set
1103         foreach my $opt (@extra_options) {
1104                 if (not exists $allowed_options{$opt}) {
1105                         die_error(400, "Invalid option parameter");
1106                 }
1107                 if (not grep(/^$action$/, @{$allowed_options{$opt}})) {
1108                         die_error(400, "Invalid option parameter for this action");
1109                 }
1110         }
1111
1112         our $hash_parent_base = $input_params{'hash_parent_base'};
1113         if (defined $hash_parent_base) {
1114                 if (!is_valid_refname($hash_parent_base)) {
1115                         die_error(400, "Invalid hash parent base parameter");
1116                 }
1117         }
1118
1119         # other parameters
1120         our $page = $input_params{'page'};
1121         if (defined $page) {
1122                 if ($page =~ m/[^0-9]/) {
1123                         die_error(400, "Invalid page parameter");
1124                 }
1125         }
1126
1127         our $searchtype = $input_params{'searchtype'};
1128         if (defined $searchtype) {
1129                 if ($searchtype =~ m/[^a-z]/) {
1130                         die_error(400, "Invalid searchtype parameter");
1131                 }
1132         }
1133
1134         our $search_use_regexp = $input_params{'search_use_regexp'};
1135
1136         our $searchtext = $input_params{'searchtext'};
1137         our $search_regexp = undef;
1138         if (defined $searchtext) {
1139                 if (length($searchtext) < 2) {
1140                         die_error(403, "At least two characters are required for search parameter");
1141                 }
1142                 if ($search_use_regexp) {
1143                         $search_regexp = $searchtext;
1144                         if (!eval { qr/$search_regexp/; 1; }) {
1145                                 (my $error = $@) =~ s/ at \S+ line \d+.*\n?//;
1146                                 die_error(400, "Invalid search regexp '$search_regexp'",
1147                                           esc_html($error));
1148                         }
1149                 } else {
1150                         $search_regexp = quotemeta $searchtext;
1151                 }
1152         }
1153 }
1154
1155 # path to the current git repository
1156 our $git_dir;
1157 sub evaluate_git_dir {
1158         our $git_dir = "$projectroot/$project" if $project;
1159 }
1160
1161 our (@snapshot_fmts, $git_avatar, @extra_branch_refs);
1162 sub configure_gitweb_features {
1163         # list of supported snapshot formats
1164         our @snapshot_fmts = gitweb_get_feature('snapshot');
1165         @snapshot_fmts = filter_snapshot_fmts(@snapshot_fmts);
1166
1167         # check that the avatar feature is set to a known provider name,
1168         # and for each provider check if the dependencies are satisfied.
1169         # if the provider name is invalid or the dependencies are not met,
1170         # reset $git_avatar to the empty string.
1171         our ($git_avatar) = gitweb_get_feature('avatar');
1172         if ($git_avatar eq 'gravatar') {
1173                 $git_avatar = '' unless (eval { require Digest::MD5; 1; });
1174         } elsif ($git_avatar eq 'picon') {
1175                 # no dependencies
1176         } else {
1177                 $git_avatar = '';
1178         }
1179
1180         our @extra_branch_refs = gitweb_get_feature('extra-branch-refs');
1181         @extra_branch_refs = filter_and_validate_refs (@extra_branch_refs);
1182 }
1183
1184 sub get_branch_refs {
1185         return ('heads', @extra_branch_refs);
1186 }
1187
1188 # custom error handler: 'die <message>' is Internal Server Error
1189 sub handle_errors_html {
1190         my $msg = shift; # it is already HTML escaped
1191
1192         # to avoid infinite loop where error occurs in die_error,
1193         # change handler to default handler, disabling handle_errors_html
1194         set_message("Error occurred when inside die_error:\n$msg");
1195
1196         # you cannot jump out of die_error when called as error handler;
1197         # the subroutine set via CGI::Carp::set_message is called _after_
1198         # HTTP headers are already written, so it cannot write them itself
1199         die_error(undef, undef, $msg, -error_handler => 1, -no_http_header => 1);
1200 }
1201 set_message(\&handle_errors_html);
1202
1203 # dispatch
1204 sub dispatch {
1205         if (!defined $action) {
1206                 if (defined $hash) {
1207                         $action = git_get_type($hash);
1208                         $action or die_error(404, "Object does not exist");
1209                 } elsif (defined $hash_base && defined $file_name) {
1210                         $action = git_get_type("$hash_base:$file_name");
1211                         $action or die_error(404, "File or directory does not exist");
1212                 } elsif (defined $project) {
1213                         $action = 'summary';
1214                 } else {
1215                         $action = 'project_list';
1216                 }
1217         }
1218         if (!defined($actions{$action})) {
1219                 die_error(400, "Unknown action");
1220         }
1221         if ($action !~ m/^(?:opml|project_list|project_index)$/ &&
1222             !$project) {
1223                 die_error(400, "Project needed");
1224         }
1225         $actions{$action}->();
1226 }
1227
1228 sub reset_timer {
1229         our $t0 = [ gettimeofday() ]
1230                 if defined $t0;
1231         our $number_of_git_cmds = 0;
1232 }
1233
1234 our $first_request = 1;
1235 sub run_request {
1236         reset_timer();
1237
1238         evaluate_uri();
1239         if ($first_request) {
1240                 evaluate_gitweb_config();
1241                 evaluate_git_version();
1242         }
1243         if ($per_request_config) {
1244                 if (ref($per_request_config) eq 'CODE') {
1245                         $per_request_config->();
1246                 } elsif (!$first_request) {
1247                         evaluate_gitweb_config();
1248                 }
1249         }
1250         check_loadavg();
1251
1252         # $projectroot and $projects_list might be set in gitweb config file
1253         $projects_list ||= $projectroot;
1254
1255         evaluate_query_params();
1256         evaluate_path_info();
1257         evaluate_and_validate_params();
1258         evaluate_git_dir();
1259
1260         configure_gitweb_features();
1261
1262         dispatch();
1263 }
1264
1265 our $is_last_request = sub { 1 };
1266 our ($pre_dispatch_hook, $post_dispatch_hook, $pre_listen_hook);
1267 our $CGI = 'CGI';
1268 our $cgi;
1269 sub configure_as_fcgi {
1270         require CGI::Fast;
1271         our $CGI = 'CGI::Fast';
1272
1273         my $request_number = 0;
1274         # let each child service 100 requests
1275         our $is_last_request = sub { ++$request_number > 100 };
1276 }
1277 sub evaluate_argv {
1278         my $script_name = $ENV{'SCRIPT_NAME'} || $ENV{'SCRIPT_FILENAME'} || __FILE__;
1279         configure_as_fcgi()
1280                 if $script_name =~ /\.fcgi$/;
1281
1282         return unless (@ARGV);
1283
1284         require Getopt::Long;
1285         Getopt::Long::GetOptions(
1286                 'fastcgi|fcgi|f' => \&configure_as_fcgi,
1287                 'nproc|n=i' => sub {
1288                         my ($arg, $val) = @_;
1289                         return unless eval { require FCGI::ProcManager; 1; };
1290                         my $proc_manager = FCGI::ProcManager->new({
1291                                 n_processes => $val,
1292                         });
1293                         our $pre_listen_hook    = sub { $proc_manager->pm_manage()        };
1294                         our $pre_dispatch_hook  = sub { $proc_manager->pm_pre_dispatch()  };
1295                         our $post_dispatch_hook = sub { $proc_manager->pm_post_dispatch() };
1296                 },
1297         );
1298 }
1299
1300 sub run {
1301         evaluate_argv();
1302
1303         $first_request = 1;
1304         $pre_listen_hook->()
1305                 if $pre_listen_hook;
1306
1307  REQUEST:
1308         while ($cgi = $CGI->new()) {
1309                 $pre_dispatch_hook->()
1310                         if $pre_dispatch_hook;
1311
1312                 run_request();
1313
1314                 $post_dispatch_hook->()
1315                         if $post_dispatch_hook;
1316                 $first_request = 0;
1317
1318                 last REQUEST if ($is_last_request->());
1319         }
1320
1321  DONE_GITWEB:
1322         1;
1323 }
1324
1325 run();
1326
1327 if (defined caller) {
1328         # wrapped in a subroutine processing requests,
1329         # e.g. mod_perl with ModPerl::Registry, or PSGI with Plack::App::WrapCGI
1330         return;
1331 } else {
1332         # pure CGI script, serving single request
1333         exit;
1334 }
1335
1336 ## ======================================================================
1337 ## action links
1338
1339 # possible values of extra options
1340 # -full => 0|1      - use absolute/full URL ($my_uri/$my_url as base)
1341 # -replay => 1      - start from a current view (replay with modifications)
1342 # -path_info => 0|1 - don't use/use path_info URL (if possible)
1343 # -anchor => ANCHOR - add #ANCHOR to end of URL, implies -replay if used alone
1344 sub href {
1345         my %params = @_;
1346         # default is to use -absolute url() i.e. $my_uri
1347         my $href = $params{-full} ? $my_url : $my_uri;
1348
1349         # implicit -replay, must be first of implicit params
1350         $params{-replay} = 1 if (keys %params == 1 && $params{-anchor});
1351
1352         $params{'project'} = $project unless exists $params{'project'};
1353
1354         if ($params{-replay}) {
1355                 while (my ($name, $symbol) = each %cgi_param_mapping) {
1356                         if (!exists $params{$name}) {
1357                                 $params{$name} = $input_params{$name};
1358                         }
1359                 }
1360         }
1361
1362         my $use_pathinfo = gitweb_check_feature('pathinfo');
1363         if (defined $params{'project'} &&
1364             (exists $params{-path_info} ? $params{-path_info} : $use_pathinfo)) {
1365                 # try to put as many parameters as possible in PATH_INFO:
1366                 #   - project name
1367                 #   - action
1368                 #   - hash_parent or hash_parent_base:/file_parent
1369                 #   - hash or hash_base:/filename
1370                 #   - the snapshot_format as an appropriate suffix
1371
1372                 # When the script is the root DirectoryIndex for the domain,
1373                 # $href here would be something like http://gitweb.example.com/
1374                 # Thus, we strip any trailing / from $href, to spare us double
1375                 # slashes in the final URL
1376                 $href =~ s,/$,,;
1377
1378                 # Then add the project name, if present
1379                 $href .= "/".esc_path_info($params{'project'});
1380                 delete $params{'project'};
1381
1382                 # since we destructively absorb parameters, we keep this
1383                 # boolean that remembers if we're handling a snapshot
1384                 my $is_snapshot = $params{'action'} eq 'snapshot';
1385
1386                 # Summary just uses the project path URL, any other action is
1387                 # added to the URL
1388                 if (defined $params{'action'}) {
1389                         $href .= "/".esc_path_info($params{'action'})
1390                                 unless $params{'action'} eq 'summary';
1391                         delete $params{'action'};
1392                 }
1393
1394                 # Next, we put hash_parent_base:/file_parent..hash_base:/file_name,
1395                 # stripping nonexistent or useless pieces
1396                 $href .= "/" if ($params{'hash_base'} || $params{'hash_parent_base'}
1397                         || $params{'hash_parent'} || $params{'hash'});
1398                 if (defined $params{'hash_base'}) {
1399                         if (defined $params{'hash_parent_base'}) {
1400                                 $href .= esc_path_info($params{'hash_parent_base'});
1401                                 # skip the file_parent if it's the same as the file_name
1402                                 if (defined $params{'file_parent'}) {
1403                                         if (defined $params{'file_name'} && $params{'file_parent'} eq $params{'file_name'}) {
1404                                                 delete $params{'file_parent'};
1405                                         } elsif ($params{'file_parent'} !~ /\.\./) {
1406                                                 $href .= ":/".esc_path_info($params{'file_parent'});
1407                                                 delete $params{'file_parent'};
1408                                         }
1409                                 }
1410                                 $href .= "..";
1411                                 delete $params{'hash_parent'};
1412                                 delete $params{'hash_parent_base'};
1413                         } elsif (defined $params{'hash_parent'}) {
1414                                 $href .= esc_path_info($params{'hash_parent'}). "..";
1415                                 delete $params{'hash_parent'};
1416                         }
1417
1418                         $href .= esc_path_info($params{'hash_base'});
1419                         if (defined $params{'file_name'} && $params{'file_name'} !~ /\.\./) {
1420                                 $href .= ":/".esc_path_info($params{'file_name'});
1421                                 delete $params{'file_name'};
1422                         }
1423                         delete $params{'hash'};
1424                         delete $params{'hash_base'};
1425                 } elsif (defined $params{'hash'}) {
1426                         $href .= esc_path_info($params{'hash'});
1427                         delete $params{'hash'};
1428                 }
1429
1430                 # If the action was a snapshot, we can absorb the
1431                 # snapshot_format parameter too
1432                 if ($is_snapshot) {
1433                         my $fmt = $params{'snapshot_format'};
1434                         # snapshot_format should always be defined when href()
1435                         # is called, but just in case some code forgets, we
1436                         # fall back to the default
1437                         $fmt ||= $snapshot_fmts[0];
1438                         $href .= $known_snapshot_formats{$fmt}{'suffix'};
1439                         delete $params{'snapshot_format'};
1440                 }
1441         }
1442
1443         # now encode the parameters explicitly
1444         my @result = ();
1445         for (my $i = 0; $i < @cgi_param_mapping; $i += 2) {
1446                 my ($name, $symbol) = ($cgi_param_mapping[$i], $cgi_param_mapping[$i+1]);
1447                 if (defined $params{$name}) {
1448                         if (ref($params{$name}) eq "ARRAY") {
1449                                 foreach my $par (@{$params{$name}}) {
1450                                         push @result, $symbol . "=" . esc_param($par);
1451                                 }
1452                         } else {
1453                                 push @result, $symbol . "=" . esc_param($params{$name});
1454                         }
1455                 }
1456         }
1457         $href .= "?" . join(';', @result) if scalar @result;
1458
1459         # final transformation: trailing spaces must be escaped (URI-encoded)
1460         $href =~ s/(\s+)$/CGI::escape($1)/e;
1461
1462         if ($params{-anchor}) {
1463                 $href .= "#".esc_param($params{-anchor});
1464         }
1465
1466         return $href;
1467 }
1468
1469
1470 ## ======================================================================
1471 ## validation, quoting/unquoting and escaping
1472
1473 sub is_valid_action {
1474         my $input = shift;
1475         return undef unless exists $actions{$input};
1476         return 1;
1477 }
1478
1479 sub is_valid_project {
1480         my $input = shift;
1481
1482         return unless defined $input;
1483         if (!is_valid_pathname($input) ||
1484                 !(-d "$projectroot/$input") ||
1485                 !check_export_ok("$projectroot/$input") ||
1486                 ($strict_export && !project_in_list($input))) {
1487                 return undef;
1488         } else {
1489                 return 1;
1490         }
1491 }
1492
1493 sub is_valid_pathname {
1494         my $input = shift;
1495
1496         return undef unless defined $input;
1497         # no '.' or '..' as elements of path, i.e. no '.' or '..'
1498         # at the beginning, at the end, and between slashes.
1499         # also this catches doubled slashes
1500         if ($input =~ m!(^|/)(|\.|\.\.)(/|$)!) {
1501                 return undef;
1502         }
1503         # no null characters
1504         if ($input =~ m!\0!) {
1505                 return undef;
1506         }
1507         return 1;
1508 }
1509
1510 sub is_valid_ref_format {
1511         my $input = shift;
1512
1513         return undef unless defined $input;
1514         # restrictions on ref name according to git-check-ref-format
1515         if ($input =~ m!(/\.|\.\.|[\000-\040\177 ~^:?*\[]|/$)!) {
1516                 return undef;
1517         }
1518         return 1;
1519 }
1520
1521 sub is_valid_refname {
1522         my $input = shift;
1523
1524         return undef unless defined $input;
1525         # textual hashes are O.K.
1526         if ($input =~ m/^[0-9a-fA-F]{40}$/) {
1527                 return 1;
1528         }
1529         # it must be correct pathname
1530         is_valid_pathname($input) or return undef;
1531         # check git-check-ref-format restrictions
1532         is_valid_ref_format($input) or return undef;
1533         return 1;
1534 }
1535
1536 # decode sequences of octets in utf8 into Perl's internal form,
1537 # which is utf-8 with utf8 flag set if needed.  gitweb writes out
1538 # in utf-8 thanks to "binmode STDOUT, ':utf8'" at beginning
1539 sub to_utf8 {
1540         my $str = shift;
1541         return undef unless defined $str;
1542
1543         if (utf8::is_utf8($str) || utf8::decode($str)) {
1544                 return $str;
1545         } else {
1546                 return decode($fallback_encoding, $str, Encode::FB_DEFAULT);
1547         }
1548 }
1549
1550 # quote unsafe chars, but keep the slash, even when it's not
1551 # correct, but quoted slashes look too horrible in bookmarks
1552 sub esc_param {
1553         my $str = shift;
1554         return undef unless defined $str;
1555         $str =~ s/([^A-Za-z0-9\-_.~()\/:@ ]+)/CGI::escape($1)/eg;
1556         $str =~ s/ /\+/g;
1557         return $str;
1558 }
1559
1560 # the quoting rules for path_info fragment are slightly different
1561 sub esc_path_info {
1562         my $str = shift;
1563         return undef unless defined $str;
1564
1565         # path_info doesn't treat '+' as space (specially), but '?' must be escaped
1566         $str =~ s/([^A-Za-z0-9\-_.~();\/;:@&= +]+)/CGI::escape($1)/eg;
1567
1568         return $str;
1569 }
1570
1571 # quote unsafe chars in whole URL, so some characters cannot be quoted
1572 sub esc_url {
1573         my $str = shift;
1574         return undef unless defined $str;
1575         $str =~ s/([^A-Za-z0-9\-_.~();\/;?:@&= ]+)/CGI::escape($1)/eg;
1576         $str =~ s/ /\+/g;
1577         return $str;
1578 }
1579
1580 # quote unsafe characters in HTML attributes
1581 sub esc_attr {
1582
1583         # for XHTML conformance escaping '"' to '&quot;' is not enough
1584         return esc_html(@_);
1585 }
1586
1587 # replace invalid utf8 character with SUBSTITUTION sequence
1588 sub esc_html {
1589         my $str = shift;
1590         my %opts = @_;
1591
1592         return undef unless defined $str;
1593
1594         $str = to_utf8($str);
1595         $str = $cgi->escapeHTML($str);
1596         if ($opts{'-nbsp'}) {
1597                 $str =~ s/ /&nbsp;/g;
1598         }
1599         $str =~ s|([[:cntrl:]])|(($1 ne "\t") ? quot_cec($1) : $1)|eg;
1600         return $str;
1601 }
1602
1603 # quote control characters and escape filename to HTML
1604 sub esc_path {
1605         my $str = shift;
1606         my %opts = @_;
1607
1608         return undef unless defined $str;
1609
1610         $str = to_utf8($str);
1611         $str = $cgi->escapeHTML($str);
1612         if ($opts{'-nbsp'}) {
1613                 $str =~ s/ /&nbsp;/g;
1614         }
1615         $str =~ s|([[:cntrl:]])|quot_cec($1)|eg;
1616         return $str;
1617 }
1618
1619 # Sanitize for use in XHTML + application/xml+xhtml (valid XML 1.0)
1620 sub sanitize {
1621         my $str = shift;
1622
1623         return undef unless defined $str;
1624
1625         $str = to_utf8($str);
1626         $str =~ s|([[:cntrl:]])|(index("\t\n\r", $1) != -1 ? $1 : quot_cec($1))|eg;
1627         return $str;
1628 }
1629
1630 # Make control characters "printable", using character escape codes (CEC)
1631 sub quot_cec {
1632         my $cntrl = shift;
1633         my %opts = @_;
1634         my %es = ( # character escape codes, aka escape sequences
1635                 "\t" => '\t',   # tab            (HT)
1636                 "\n" => '\n',   # line feed      (LF)
1637                 "\r" => '\r',   # carrige return (CR)
1638                 "\f" => '\f',   # form feed      (FF)
1639                 "\b" => '\b',   # backspace      (BS)
1640                 "\a" => '\a',   # alarm (bell)   (BEL)
1641                 "\e" => '\e',   # escape         (ESC)
1642                 "\013" => '\v', # vertical tab   (VT)
1643                 "\000" => '\0', # nul character  (NUL)
1644         );
1645         my $chr = ( (exists $es{$cntrl})
1646                     ? $es{$cntrl}
1647                     : sprintf('\%2x', ord($cntrl)) );
1648         if ($opts{-nohtml}) {
1649                 return $chr;
1650         } else {
1651                 return "<span class=\"cntrl\">$chr</span>";
1652         }
1653 }
1654
1655 # Alternatively use unicode control pictures codepoints,
1656 # Unicode "printable representation" (PR)
1657 sub quot_upr {
1658         my $cntrl = shift;
1659         my %opts = @_;
1660
1661         my $chr = sprintf('&#%04d;', 0x2400+ord($cntrl));
1662         if ($opts{-nohtml}) {
1663                 return $chr;
1664         } else {
1665                 return "<span class=\"cntrl\">$chr</span>";
1666         }
1667 }
1668
1669 # git may return quoted and escaped filenames
1670 sub unquote {
1671         my $str = shift;
1672
1673         sub unq {
1674                 my $seq = shift;
1675                 my %es = ( # character escape codes, aka escape sequences
1676                         't' => "\t",   # tab            (HT, TAB)
1677                         'n' => "\n",   # newline        (NL)
1678                         'r' => "\r",   # return         (CR)
1679                         'f' => "\f",   # form feed      (FF)
1680                         'b' => "\b",   # backspace      (BS)
1681                         'a' => "\a",   # alarm (bell)   (BEL)
1682                         'e' => "\e",   # escape         (ESC)
1683                         'v' => "\013", # vertical tab   (VT)
1684                 );
1685
1686                 if ($seq =~ m/^[0-7]{1,3}$/) {
1687                         # octal char sequence
1688                         return chr(oct($seq));
1689                 } elsif (exists $es{$seq}) {
1690                         # C escape sequence, aka character escape code
1691                         return $es{$seq};
1692                 }
1693                 # quoted ordinary character
1694                 return $seq;
1695         }
1696
1697         if ($str =~ m/^"(.*)"$/) {
1698                 # needs unquoting
1699                 $str = $1;
1700                 $str =~ s/\\([^0-7]|[0-7]{1,3})/unq($1)/eg;
1701         }
1702         return $str;
1703 }
1704
1705 # escape tabs (convert tabs to spaces)
1706 sub untabify {
1707         my $line = shift;
1708
1709         while ((my $pos = index($line, "\t")) != -1) {
1710                 if (my $count = (8 - ($pos % 8))) {
1711                         my $spaces = ' ' x $count;
1712                         $line =~ s/\t/$spaces/;
1713                 }
1714         }
1715
1716         return $line;
1717 }
1718
1719 sub project_in_list {
1720         my $project = shift;
1721         my @list = git_get_projects_list();
1722         return @list && scalar(grep { $_->{'path'} eq $project } @list);
1723 }
1724
1725 ## ----------------------------------------------------------------------
1726 ## HTML aware string manipulation
1727
1728 # Try to chop given string on a word boundary between position
1729 # $len and $len+$add_len. If there is no word boundary there,
1730 # chop at $len+$add_len. Do not chop if chopped part plus ellipsis
1731 # (marking chopped part) would be longer than given string.
1732 sub chop_str {
1733         my $str = shift;
1734         my $len = shift;
1735         my $add_len = shift || 10;
1736         my $where = shift || 'right'; # 'left' | 'center' | 'right'
1737
1738         # Make sure perl knows it is utf8 encoded so we don't
1739         # cut in the middle of a utf8 multibyte char.
1740         $str = to_utf8($str);
1741
1742         # allow only $len chars, but don't cut a word if it would fit in $add_len
1743         # if it doesn't fit, cut it if it's still longer than the dots we would add
1744         # remove chopped character entities entirely
1745
1746         # when chopping in the middle, distribute $len into left and right part
1747         # return early if chopping wouldn't make string shorter
1748         if ($where eq 'center') {
1749                 return $str if ($len + 5 >= length($str)); # filler is length 5
1750                 $len = int($len/2);
1751         } else {
1752                 return $str if ($len + 4 >= length($str)); # filler is length 4
1753         }
1754
1755         # regexps: ending and beginning with word part up to $add_len
1756         my $endre = qr/.{$len}\w{0,$add_len}/;
1757         my $begre = qr/\w{0,$add_len}.{$len}/;
1758
1759         if ($where eq 'left') {
1760                 $str =~ m/^(.*?)($begre)$/;
1761                 my ($lead, $body) = ($1, $2);
1762                 if (length($lead) > 4) {
1763                         $lead = " ...";
1764                 }
1765                 return "$lead$body";
1766
1767         } elsif ($where eq 'center') {
1768                 $str =~ m/^($endre)(.*)$/;
1769                 my ($left, $str)  = ($1, $2);
1770                 $str =~ m/^(.*?)($begre)$/;
1771                 my ($mid, $right) = ($1, $2);
1772                 if (length($mid) > 5) {
1773                         $mid = " ... ";
1774                 }
1775                 return "$left$mid$right";
1776
1777         } else {
1778                 $str =~ m/^($endre)(.*)$/;
1779                 my $body = $1;
1780                 my $tail = $2;
1781                 if (length($tail) > 4) {
1782                         $tail = "... ";
1783                 }
1784                 return "$body$tail";
1785         }
1786 }
1787
1788 # takes the same arguments as chop_str, but also wraps a <span> around the
1789 # result with a title attribute if it does get chopped. Additionally, the
1790 # string is HTML-escaped.
1791 sub chop_and_escape_str {
1792         my ($str) = @_;
1793
1794         my $chopped = chop_str(@_);
1795         $str = to_utf8($str);
1796         if ($chopped eq $str) {
1797                 return esc_html($chopped);
1798         } else {
1799                 $str =~ s/[[:cntrl:]]/?/g;
1800                 return $cgi->span({-title=>$str}, esc_html($chopped));
1801         }
1802 }
1803
1804 # Highlight selected fragments of string, using given CSS class,
1805 # and escape HTML.  It is assumed that fragments do not overlap.
1806 # Regions are passed as list of pairs (array references).
1807 #
1808 # Example: esc_html_hl_regions("foobar", "mark", [ 0, 3 ]) returns
1809 # '<span class="mark">foo</span>bar'
1810 sub esc_html_hl_regions {
1811         my ($str, $css_class, @sel) = @_;
1812         my %opts = grep { ref($_) ne 'ARRAY' } @sel;
1813         @sel     = grep { ref($_) eq 'ARRAY' } @sel;
1814         return esc_html($str, %opts) unless @sel;
1815
1816         my $out = '';
1817         my $pos = 0;
1818
1819         for my $s (@sel) {
1820                 my ($begin, $end) = @$s;
1821
1822                 # Don't create empty <span> elements.
1823                 next if $end <= $begin;
1824
1825                 my $escaped = esc_html(substr($str, $begin, $end - $begin),
1826                                        %opts);
1827
1828                 $out .= esc_html(substr($str, $pos, $begin - $pos), %opts)
1829                         if ($begin - $pos > 0);
1830                 $out .= $cgi->span({-class => $css_class}, $escaped);
1831
1832                 $pos = $end;
1833         }
1834         $out .= esc_html(substr($str, $pos), %opts)
1835                 if ($pos < length($str));
1836
1837         return $out;
1838 }
1839
1840 # return positions of beginning and end of each match
1841 sub matchpos_list {
1842         my ($str, $regexp) = @_;
1843         return unless (defined $str && defined $regexp);
1844
1845         my @matches;
1846         while ($str =~ /$regexp/g) {
1847                 push @matches, [$-[0], $+[0]];
1848         }
1849         return @matches;
1850 }
1851
1852 # highlight match (if any), and escape HTML
1853 sub esc_html_match_hl {
1854         my ($str, $regexp) = @_;
1855         return esc_html($str) unless defined $regexp;
1856
1857         my @matches = matchpos_list($str, $regexp);
1858         return esc_html($str) unless @matches;
1859
1860         return esc_html_hl_regions($str, 'match', @matches);
1861 }
1862
1863
1864 # highlight match (if any) of shortened string, and escape HTML
1865 sub esc_html_match_hl_chopped {
1866         my ($str, $chopped, $regexp) = @_;
1867         return esc_html_match_hl($str, $regexp) unless defined $chopped;
1868
1869         my @matches = matchpos_list($str, $regexp);
1870         return esc_html($chopped) unless @matches;
1871
1872         # filter matches so that we mark chopped string
1873         my $tail = "... "; # see chop_str
1874         unless ($chopped =~ s/\Q$tail\E$//) {
1875                 $tail = '';
1876         }
1877         my $chop_len = length($chopped);
1878         my $tail_len = length($tail);
1879         my @filtered;
1880
1881         for my $m (@matches) {
1882                 if ($m->[0] > $chop_len) {
1883                         push @filtered, [ $chop_len, $chop_len + $tail_len ] if ($tail_len > 0);
1884                         last;
1885                 } elsif ($m->[1] > $chop_len) {
1886                         push @filtered, [ $m->[0], $chop_len + $tail_len ];
1887                         last;
1888                 }
1889                 push @filtered, $m;
1890         }
1891
1892         return esc_html_hl_regions($chopped . $tail, 'match', @filtered);
1893 }
1894
1895 ## ----------------------------------------------------------------------
1896 ## functions returning short strings
1897
1898 # CSS class for given age value (in seconds)
1899 sub age_class {
1900         my $age = shift;
1901
1902         if (!defined $age) {
1903                 return "noage";
1904         } elsif ($age < 60*60*2) {
1905                 return "age0";
1906         } elsif ($age < 60*60*24*2) {
1907                 return "age1";
1908         } else {
1909                 return "age2";
1910         }
1911 }
1912
1913 # convert age in seconds to "nn units ago" string
1914 sub age_string {
1915         my $age = shift;
1916         my $age_str;
1917
1918         if ($age > 60*60*24*365*2) {
1919                 $age_str = (int $age/60/60/24/365);
1920                 $age_str .= " years ago";
1921         } elsif ($age > 60*60*24*(365/12)*2) {
1922                 $age_str = int $age/60/60/24/(365/12);
1923                 $age_str .= " months ago";
1924         } elsif ($age > 60*60*24*7*2) {
1925                 $age_str = int $age/60/60/24/7;
1926                 $age_str .= " weeks ago";
1927         } elsif ($age > 60*60*24*2) {
1928                 $age_str = int $age/60/60/24;
1929                 $age_str .= " days ago";
1930         } elsif ($age > 60*60*2) {
1931                 $age_str = int $age/60/60;
1932                 $age_str .= " hours ago";
1933         } elsif ($age > 60*2) {
1934                 $age_str = int $age/60;
1935                 $age_str .= " min ago";
1936         } elsif ($age > 2) {
1937                 $age_str = int $age;
1938                 $age_str .= " sec ago";
1939         } else {
1940                 $age_str .= " right now";
1941         }
1942         return $age_str;
1943 }
1944
1945 use constant {
1946         S_IFINVALID => 0030000,
1947         S_IFGITLINK => 0160000,
1948 };
1949
1950 # submodule/subproject, a commit object reference
1951 sub S_ISGITLINK {
1952         my $mode = shift;
1953
1954         return (($mode & S_IFMT) == S_IFGITLINK)
1955 }
1956
1957 # convert file mode in octal to symbolic file mode string
1958 sub mode_str {
1959         my $mode = oct shift;
1960
1961         if (S_ISGITLINK($mode)) {
1962                 return 'm---------';
1963         } elsif (S_ISDIR($mode & S_IFMT)) {
1964                 return 'drwxr-xr-x';
1965         } elsif (S_ISLNK($mode)) {
1966                 return 'lrwxrwxrwx';
1967         } elsif (S_ISREG($mode)) {
1968                 # git cares only about the executable bit
1969                 if ($mode & S_IXUSR) {
1970                         return '-rwxr-xr-x';
1971                 } else {
1972                         return '-rw-r--r--';
1973                 };
1974         } else {
1975                 return '----------';
1976         }
1977 }
1978
1979 # convert file mode in octal to file type string
1980 sub file_type {
1981         my $mode = shift;
1982
1983         if ($mode !~ m/^[0-7]+$/) {
1984                 return $mode;
1985         } else {
1986                 $mode = oct $mode;
1987         }
1988
1989         if (S_ISGITLINK($mode)) {
1990                 return "submodule";
1991         } elsif (S_ISDIR($mode & S_IFMT)) {
1992                 return "directory";
1993         } elsif (S_ISLNK($mode)) {
1994                 return "symlink";
1995         } elsif (S_ISREG($mode)) {
1996                 return "file";
1997         } else {
1998                 return "unknown";
1999         }
2000 }
2001
2002 # convert file mode in octal to file type description string
2003 sub file_type_long {
2004         my $mode = shift;
2005
2006         if ($mode !~ m/^[0-7]+$/) {
2007                 return $mode;
2008         } else {
2009                 $mode = oct $mode;
2010         }
2011
2012         if (S_ISGITLINK($mode)) {
2013                 return "submodule";
2014         } elsif (S_ISDIR($mode & S_IFMT)) {
2015                 return "directory";
2016         } elsif (S_ISLNK($mode)) {
2017                 return "symlink";
2018         } elsif (S_ISREG($mode)) {
2019                 if ($mode & S_IXUSR) {
2020                         return "executable";
2021                 } else {
2022                         return "file";
2023                 };
2024         } else {
2025                 return "unknown";
2026         }
2027 }
2028
2029
2030 ## ----------------------------------------------------------------------
2031 ## functions returning short HTML fragments, or transforming HTML fragments
2032 ## which don't belong to other sections
2033
2034 # format line of commit message.
2035 sub format_log_line_html {
2036         my $line = shift;
2037
2038         $line = esc_html($line, -nbsp=>1);
2039         $line =~ s{
2040         \b
2041         (
2042             # The output of "git describe", e.g. v2.10.0-297-gf6727b0
2043             # or hadoop-20160921-113441-20-g094fb7d
2044             (?<!-) # see strbuf_check_tag_ref(). Tags can't start with -
2045             [A-Za-z0-9.-]+
2046             (?!\.) # refs can't end with ".", see check_refname_format()
2047             -g[0-9a-fA-F]{7,40}
2048             |
2049             # Just a normal looking Git SHA1
2050             [0-9a-fA-F]{7,40}
2051         )
2052         \b
2053     }{
2054                 $cgi->a({-href => href(action=>"object", hash=>$1),
2055                                         -class => "text"}, $1);
2056         }egx;
2057
2058         return $line;
2059 }
2060
2061 # format marker of refs pointing to given object
2062
2063 # the destination action is chosen based on object type and current context:
2064 # - for annotated tags, we choose the tag view unless it's the current view
2065 #   already, in which case we go to shortlog view
2066 # - for other refs, we keep the current view if we're in history, shortlog or
2067 #   log view, and select shortlog otherwise
2068 sub format_ref_marker {
2069         my ($refs, $id) = @_;
2070         my $markers = '';
2071
2072         if (defined $refs->{$id}) {
2073                 foreach my $ref (@{$refs->{$id}}) {
2074                         # this code exploits the fact that non-lightweight tags are the
2075                         # only indirect objects, and that they are the only objects for which
2076                         # we want to use tag instead of shortlog as action
2077                         my ($type, $name) = qw();
2078                         my $indirect = ($ref =~ s/\^\{\}$//);
2079                         # e.g. tags/v2.6.11 or heads/next
2080                         if ($ref =~ m!^(.*?)s?/(.*)$!) {
2081                                 $type = $1;
2082                                 $name = $2;
2083                         } else {
2084                                 $type = "ref";
2085                                 $name = $ref;
2086                         }
2087
2088                         my $class = $type;
2089                         $class .= " indirect" if $indirect;
2090
2091                         my $dest_action = "shortlog";
2092
2093                         if ($indirect) {
2094                                 $dest_action = "tag" unless $action eq "tag";
2095                         } elsif ($action =~ /^(history|(short)?log)$/) {
2096                                 $dest_action = $action;
2097                         }
2098
2099                         my $dest = "";
2100                         $dest .= "refs/" unless $ref =~ m!^refs/!;
2101                         $dest .= $ref;
2102
2103                         my $link = $cgi->a({
2104                                 -href => href(
2105                                         action=>$dest_action,
2106                                         hash=>$dest
2107                                 )}, esc_html($name));
2108
2109                         $markers .= " <span class=\"".esc_attr($class)."\" title=\"".esc_attr($ref)."\">" .
2110                                 $link . "</span>";
2111                 }
2112         }
2113
2114         if ($markers) {
2115                 return ' <span class="refs">'. $markers . '</span>';
2116         } else {
2117                 return "";
2118         }
2119 }
2120
2121 # format, perhaps shortened and with markers, title line
2122 sub format_subject_html {
2123         my ($long, $short, $href, $extra) = @_;
2124         $extra = '' unless defined($extra);
2125
2126         if (length($short) < length($long)) {
2127                 $long =~ s/[[:cntrl:]]/?/g;
2128                 return $cgi->a({-href => $href, -class => "list subject",
2129                                 -title => to_utf8($long)},
2130                        esc_html($short)) . $extra;
2131         } else {
2132                 return $cgi->a({-href => $href, -class => "list subject"},
2133                        esc_html($long)) . $extra;
2134         }
2135 }
2136
2137 # Rather than recomputing the url for an email multiple times, we cache it
2138 # after the first hit. This gives a visible benefit in views where the avatar
2139 # for the same email is used repeatedly (e.g. shortlog).
2140 # The cache is shared by all avatar engines (currently gravatar only), which
2141 # are free to use it as preferred. Since only one avatar engine is used for any
2142 # given page, there's no risk for cache conflicts.
2143 our %avatar_cache = ();
2144
2145 # Compute the picon url for a given email, by using the picon search service over at
2146 # http://www.cs.indiana.edu/picons/search.html
2147 sub picon_url {
2148         my $email = lc shift;
2149         if (!$avatar_cache{$email}) {
2150                 my ($user, $domain) = split('@', $email);
2151                 $avatar_cache{$email} =
2152                         "//www.cs.indiana.edu/cgi-pub/kinzler/piconsearch.cgi/" .
2153                         "$domain/$user/" .
2154                         "users+domains+unknown/up/single";
2155         }
2156         return $avatar_cache{$email};
2157 }
2158
2159 # Compute the gravatar url for a given email, if it's not in the cache already.
2160 # Gravatar stores only the part of the URL before the size, since that's the
2161 # one computationally more expensive. This also allows reuse of the cache for
2162 # different sizes (for this particular engine).
2163 sub gravatar_url {
2164         my $email = lc shift;
2165         my $size = shift;
2166         $avatar_cache{$email} ||=
2167                 "//www.gravatar.com/avatar/" .
2168                         Digest::MD5::md5_hex($email) . "?s=";
2169         return $avatar_cache{$email} . $size;
2170 }
2171
2172 # Insert an avatar for the given $email at the given $size if the feature
2173 # is enabled.
2174 sub git_get_avatar {
2175         my ($email, %opts) = @_;
2176         my $pre_white  = ($opts{-pad_before} ? "&nbsp;" : "");
2177         my $post_white = ($opts{-pad_after}  ? "&nbsp;" : "");
2178         $opts{-size} ||= 'default';
2179         my $size = $avatar_size{$opts{-size}} || $avatar_size{'default'};
2180         my $url = "";
2181         if ($git_avatar eq 'gravatar') {
2182                 $url = gravatar_url($email, $size);
2183         } elsif ($git_avatar eq 'picon') {
2184                 $url = picon_url($email);
2185         }
2186         # Other providers can be added by extending the if chain, defining $url
2187         # as needed. If no variant puts something in $url, we assume avatars
2188         # are completely disabled/unavailable.
2189         if ($url) {
2190                 return $pre_white .
2191                        "<img width=\"$size\" " .
2192                             "class=\"avatar\" " .
2193                             "src=\"".esc_url($url)."\" " .
2194                             "alt=\"\" " .
2195                        "/>" . $post_white;
2196         } else {
2197                 return "";
2198         }
2199 }
2200
2201 sub format_search_author {
2202         my ($author, $searchtype, $displaytext) = @_;
2203         my $have_search = gitweb_check_feature('search');
2204
2205         if ($have_search) {
2206                 my $performed = "";
2207                 if ($searchtype eq 'author') {
2208                         $performed = "authored";
2209                 } elsif ($searchtype eq 'committer') {
2210                         $performed = "committed";
2211                 }
2212
2213                 return $cgi->a({-href => href(action=>"search", hash=>$hash,
2214                                 searchtext=>$author,
2215                                 searchtype=>$searchtype), class=>"list",
2216                                 title=>"Search for commits $performed by $author"},
2217                                 $displaytext);
2218
2219         } else {
2220                 return $displaytext;
2221         }
2222 }
2223
2224 # format the author name of the given commit with the given tag
2225 # the author name is chopped and escaped according to the other
2226 # optional parameters (see chop_str).
2227 sub format_author_html {
2228         my $tag = shift;
2229         my $co = shift;
2230         my $author = chop_and_escape_str($co->{'author_name'}, @_);
2231         return "<$tag class=\"author\">" .
2232                format_search_author($co->{'author_name'}, "author",
2233                        git_get_avatar($co->{'author_email'}, -pad_after => 1) .
2234                        $author) .
2235                "</$tag>";
2236 }
2237
2238 # format git diff header line, i.e. "diff --(git|combined|cc) ..."
2239 sub format_git_diff_header_line {
2240         my $line = shift;
2241         my $diffinfo = shift;
2242         my ($from, $to) = @_;
2243
2244         if ($diffinfo->{'nparents'}) {
2245                 # combined diff
2246                 $line =~ s!^(diff (.*?) )"?.*$!$1!;
2247                 if ($to->{'href'}) {
2248                         $line .= $cgi->a({-href => $to->{'href'}, -class => "path"},
2249                                          esc_path($to->{'file'}));
2250                 } else { # file was deleted (no href)
2251                         $line .= esc_path($to->{'file'});
2252                 }
2253         } else {
2254                 # "ordinary" diff
2255                 $line =~ s!^(diff (.*?) )"?a/.*$!$1!;
2256                 if ($from->{'href'}) {
2257                         $line .= $cgi->a({-href => $from->{'href'}, -class => "path"},
2258                                          'a/' . esc_path($from->{'file'}));
2259                 } else { # file was added (no href)
2260                         $line .= 'a/' . esc_path($from->{'file'});
2261                 }
2262                 $line .= ' ';
2263                 if ($to->{'href'}) {
2264                         $line .= $cgi->a({-href => $to->{'href'}, -class => "path"},
2265                                          'b/' . esc_path($to->{'file'}));
2266                 } else { # file was deleted
2267                         $line .= 'b/' . esc_path($to->{'file'});
2268                 }
2269         }
2270
2271         return "<div class=\"diff header\">$line</div>\n";
2272 }
2273
2274 # format extended diff header line, before patch itself
2275 sub format_extended_diff_header_line {
2276         my $line = shift;
2277         my $diffinfo = shift;
2278         my ($from, $to) = @_;
2279
2280         # match <path>
2281         if ($line =~ s!^((copy|rename) from ).*$!$1! && $from->{'href'}) {
2282                 $line .= $cgi->a({-href=>$from->{'href'}, -class=>"path"},
2283                                        esc_path($from->{'file'}));
2284         }
2285         if ($line =~ s!^((copy|rename) to ).*$!$1! && $to->{'href'}) {
2286                 $line .= $cgi->a({-href=>$to->{'href'}, -class=>"path"},
2287                                  esc_path($to->{'file'}));
2288         }
2289         # match single <mode>
2290         if ($line =~ m/\s(\d{6})$/) {
2291                 $line .= '<span class="info"> (' .
2292                          file_type_long($1) .
2293                          ')</span>';
2294         }
2295         # match <hash>
2296         if ($line =~ m/^index [0-9a-fA-F]{40},[0-9a-fA-F]{40}/) {
2297                 # can match only for combined diff
2298                 $line = 'index ';
2299                 for (my $i = 0; $i < $diffinfo->{'nparents'}; $i++) {
2300                         if ($from->{'href'}[$i]) {
2301                                 $line .= $cgi->a({-href=>$from->{'href'}[$i],
2302                                                   -class=>"hash"},
2303                                                  substr($diffinfo->{'from_id'}[$i],0,7));
2304                         } else {
2305                                 $line .= '0' x 7;
2306                         }
2307                         # separator
2308                         $line .= ',' if ($i < $diffinfo->{'nparents'} - 1);
2309                 }
2310                 $line .= '..';
2311                 if ($to->{'href'}) {
2312                         $line .= $cgi->a({-href=>$to->{'href'}, -class=>"hash"},
2313                                          substr($diffinfo->{'to_id'},0,7));
2314                 } else {
2315                         $line .= '0' x 7;
2316                 }
2317
2318         } elsif ($line =~ m/^index [0-9a-fA-F]{40}..[0-9a-fA-F]{40}/) {
2319                 # can match only for ordinary diff
2320                 my ($from_link, $to_link);
2321                 if ($from->{'href'}) {
2322                         $from_link = $cgi->a({-href=>$from->{'href'}, -class=>"hash"},
2323                                              substr($diffinfo->{'from_id'},0,7));
2324                 } else {
2325                         $from_link = '0' x 7;
2326                 }
2327                 if ($to->{'href'}) {
2328                         $to_link = $cgi->a({-href=>$to->{'href'}, -class=>"hash"},
2329                                            substr($diffinfo->{'to_id'},0,7));
2330                 } else {
2331                         $to_link = '0' x 7;
2332                 }
2333                 my ($from_id, $to_id) = ($diffinfo->{'from_id'}, $diffinfo->{'to_id'});
2334                 $line =~ s!$from_id\.\.$to_id!$from_link..$to_link!;
2335         }
2336
2337         return $line . "<br/>\n";
2338 }
2339
2340 # format from-file/to-file diff header
2341 sub format_diff_from_to_header {
2342         my ($from_line, $to_line, $diffinfo, $from, $to, @parents) = @_;
2343         my $line;
2344         my $result = '';
2345
2346         $line = $from_line;
2347         #assert($line =~ m/^---/) if DEBUG;
2348         # no extra formatting for "^--- /dev/null"
2349         if (! $diffinfo->{'nparents'}) {
2350                 # ordinary (single parent) diff
2351                 if ($line =~ m!^--- "?a/!) {
2352                         if ($from->{'href'}) {
2353                                 $line = '--- a/' .
2354                                         $cgi->a({-href=>$from->{'href'}, -class=>"path"},
2355                                                 esc_path($from->{'file'}));
2356                         } else {
2357                                 $line = '--- a/' .
2358                                         esc_path($from->{'file'});
2359                         }
2360                 }
2361                 $result .= qq!<div class="diff from_file">$line</div>\n!;
2362
2363         } else {
2364                 # combined diff (merge commit)
2365                 for (my $i = 0; $i < $diffinfo->{'nparents'}; $i++) {
2366                         if ($from->{'href'}[$i]) {
2367                                 $line = '--- ' .
2368                                         $cgi->a({-href=>href(action=>"blobdiff",
2369                                                              hash_parent=>$diffinfo->{'from_id'}[$i],
2370                                                              hash_parent_base=>$parents[$i],
2371                                                              file_parent=>$from->{'file'}[$i],
2372                                                              hash=>$diffinfo->{'to_id'},
2373                                                              hash_base=>$hash,
2374                                                              file_name=>$to->{'file'}),
2375                                                  -class=>"path",
2376                                                  -title=>"diff" . ($i+1)},
2377                                                 $i+1) .
2378                                         '/' .
2379                                         $cgi->a({-href=>$from->{'href'}[$i], -class=>"path"},
2380                                                 esc_path($from->{'file'}[$i]));
2381                         } else {
2382                                 $line = '--- /dev/null';
2383                         }
2384                         $result .= qq!<div class="diff from_file">$line</div>\n!;
2385                 }
2386         }
2387
2388         $line = $to_line;
2389         #assert($line =~ m/^\+\+\+/) if DEBUG;
2390         # no extra formatting for "^+++ /dev/null"
2391         if ($line =~ m!^\+\+\+ "?b/!) {
2392                 if ($to->{'href'}) {
2393                         $line = '+++ b/' .
2394                                 $cgi->a({-href=>$to->{'href'}, -class=>"path"},
2395                                         esc_path($to->{'file'}));
2396                 } else {
2397                         $line = '+++ b/' .
2398                                 esc_path($to->{'file'});
2399                 }
2400         }
2401         $result .= qq!<div class="diff to_file">$line</div>\n!;
2402
2403         return $result;
2404 }
2405
2406 # create note for patch simplified by combined diff
2407 sub format_diff_cc_simplified {
2408         my ($diffinfo, @parents) = @_;
2409         my $result = '';
2410
2411         $result .= "<div class=\"diff header\">" .
2412                    "diff --cc ";
2413         if (!is_deleted($diffinfo)) {
2414                 $result .= $cgi->a({-href => href(action=>"blob",
2415                                                   hash_base=>$hash,
2416                                                   hash=>$diffinfo->{'to_id'},
2417                                                   file_name=>$diffinfo->{'to_file'}),
2418                                     -class => "path"},
2419                                    esc_path($diffinfo->{'to_file'}));
2420         } else {
2421                 $result .= esc_path($diffinfo->{'to_file'});
2422         }
2423         $result .= "</div>\n" . # class="diff header"
2424                    "<div class=\"diff nodifferences\">" .
2425                    "Simple merge" .
2426                    "</div>\n"; # class="diff nodifferences"
2427
2428         return $result;
2429 }
2430
2431 sub diff_line_class {
2432         my ($line, $from, $to) = @_;
2433
2434         # ordinary diff
2435         my $num_sign = 1;
2436         # combined diff
2437         if ($from && $to && ref($from->{'href'}) eq "ARRAY") {
2438                 $num_sign = scalar @{$from->{'href'}};
2439         }
2440
2441         my @diff_line_classifier = (
2442                 { regexp => qr/^\@\@{$num_sign} /, class => "chunk_header"},
2443                 { regexp => qr/^\\/,               class => "incomplete"  },
2444                 { regexp => qr/^ {$num_sign}/,     class => "ctx" },
2445                 # classifier for context must come before classifier add/rem,
2446                 # or we would have to use more complicated regexp, for example
2447                 # qr/(?= {0,$m}\+)[+ ]{$num_sign}/, where $m = $num_sign - 1;
2448                 { regexp => qr/^[+ ]{$num_sign}/,   class => "add" },
2449                 { regexp => qr/^[- ]{$num_sign}/,   class => "rem" },
2450         );
2451         for my $clsfy (@diff_line_classifier) {
2452                 return $clsfy->{'class'}
2453                         if ($line =~ $clsfy->{'regexp'});
2454         }
2455
2456         # fallback
2457         return "";
2458 }
2459
2460 # assumes that $from and $to are defined and correctly filled,
2461 # and that $line holds a line of chunk header for unified diff
2462 sub format_unidiff_chunk_header {
2463         my ($line, $from, $to) = @_;
2464
2465         my ($from_text, $from_start, $from_lines, $to_text, $to_start, $to_lines, $section) =
2466                 $line =~ m/^\@{2} (-(\d+)(?:,(\d+))?) (\+(\d+)(?:,(\d+))?) \@{2}(.*)$/;
2467
2468         $from_lines = 0 unless defined $from_lines;
2469         $to_lines   = 0 unless defined $to_lines;
2470
2471         if ($from->{'href'}) {
2472                 $from_text = $cgi->a({-href=>"$from->{'href'}#l$from_start",
2473                                      -class=>"list"}, $from_text);
2474         }
2475         if ($to->{'href'}) {
2476                 $to_text   = $cgi->a({-href=>"$to->{'href'}#l$to_start",
2477                                      -class=>"list"}, $to_text);
2478         }
2479         $line = "<span class=\"chunk_info\">@@ $from_text $to_text @@</span>" .
2480                 "<span class=\"section\">" . esc_html($section, -nbsp=>1) . "</span>";
2481         return $line;
2482 }
2483
2484 # assumes that $from and $to are defined and correctly filled,
2485 # and that $line holds a line of chunk header for combined diff
2486 sub format_cc_diff_chunk_header {
2487         my ($line, $from, $to) = @_;
2488
2489         my ($prefix, $ranges, $section) = $line =~ m/^(\@+) (.*?) \@+(.*)$/;
2490         my (@from_text, @from_start, @from_nlines, $to_text, $to_start, $to_nlines);
2491
2492         @from_text = split(' ', $ranges);
2493         for (my $i = 0; $i < @from_text; ++$i) {
2494                 ($from_start[$i], $from_nlines[$i]) =
2495                         (split(',', substr($from_text[$i], 1)), 0);
2496         }
2497
2498         $to_text   = pop @from_text;
2499         $to_start  = pop @from_start;
2500         $to_nlines = pop @from_nlines;
2501
2502         $line = "<span class=\"chunk_info\">$prefix ";
2503         for (my $i = 0; $i < @from_text; ++$i) {
2504                 if ($from->{'href'}[$i]) {
2505                         $line .= $cgi->a({-href=>"$from->{'href'}[$i]#l$from_start[$i]",
2506                                           -class=>"list"}, $from_text[$i]);
2507                 } else {
2508                         $line .= $from_text[$i];
2509                 }
2510                 $line .= " ";
2511         }
2512         if ($to->{'href'}) {
2513                 $line .= $cgi->a({-href=>"$to->{'href'}#l$to_start",
2514                                   -class=>"list"}, $to_text);
2515         } else {
2516                 $line .= $to_text;
2517         }
2518         $line .= " $prefix</span>" .
2519                  "<span class=\"section\">" . esc_html($section, -nbsp=>1) . "</span>";
2520         return $line;
2521 }
2522
2523 # process patch (diff) line (not to be used for diff headers),
2524 # returning HTML-formatted (but not wrapped) line.
2525 # If the line is passed as a reference, it is treated as HTML and not
2526 # esc_html()'ed.
2527 sub format_diff_line {
2528         my ($line, $diff_class, $from, $to) = @_;
2529
2530         if (ref($line)) {
2531                 $line = $$line;
2532         } else {
2533                 chomp $line;
2534                 $line = untabify($line);
2535
2536                 if ($from && $to && $line =~ m/^\@{2} /) {
2537                         $line = format_unidiff_chunk_header($line, $from, $to);
2538                 } elsif ($from && $to && $line =~ m/^\@{3}/) {
2539                         $line = format_cc_diff_chunk_header($line, $from, $to);
2540                 } else {
2541                         $line = esc_html($line, -nbsp=>1);
2542                 }
2543         }
2544
2545         my $diff_classes = "diff";
2546         $diff_classes .= " $diff_class" if ($diff_class);
2547         $line = "<div class=\"$diff_classes\">$line</div>\n";
2548
2549         return $line;
2550 }
2551
2552 # Generates undef or something like "_snapshot_" or "snapshot (_tbz2_ _zip_)",
2553 # linked.  Pass the hash of the tree/commit to snapshot.
2554 sub format_snapshot_links {
2555         my ($hash) = @_;
2556         my $num_fmts = @snapshot_fmts;
2557         if ($num_fmts > 1) {
2558                 # A parenthesized list of links bearing format names.
2559                 # e.g. "snapshot (_tar.gz_ _zip_)"
2560                 return "snapshot (" . join(' ', map
2561                         $cgi->a({
2562                                 -href => href(
2563                                         action=>"snapshot",
2564                                         hash=>$hash,
2565                                         snapshot_format=>$_
2566                                 )
2567                         }, $known_snapshot_formats{$_}{'display'})
2568                 , @snapshot_fmts) . ")";
2569         } elsif ($num_fmts == 1) {
2570                 # A single "snapshot" link whose tooltip bears the format name.
2571                 # i.e. "_snapshot_"
2572                 my ($fmt) = @snapshot_fmts;
2573                 return
2574                         $cgi->a({
2575                                 -href => href(
2576                                         action=>"snapshot",
2577                                         hash=>$hash,
2578                                         snapshot_format=>$fmt
2579                                 ),
2580                                 -title => "in format: $known_snapshot_formats{$fmt}{'display'}"
2581                         }, "snapshot");
2582         } else { # $num_fmts == 0
2583                 return undef;
2584         }
2585 }
2586
2587 ## ......................................................................
2588 ## functions returning values to be passed, perhaps after some
2589 ## transformation, to other functions; e.g. returning arguments to href()
2590
2591 # returns hash to be passed to href to generate gitweb URL
2592 # in -title key it returns description of link
2593 sub get_feed_info {
2594         my $format = shift || 'Atom';
2595         my %res = (action => lc($format));
2596         my $matched_ref = 0;
2597
2598         # feed links are possible only for project views
2599         return unless (defined $project);
2600         # some views should link to OPML, or to generic project feed,
2601         # or don't have specific feed yet (so they should use generic)
2602         return if (!$action || $action =~ /^(?:tags|heads|forks|tag|search)$/x);
2603
2604         my $branch = undef;
2605         # branches refs uses 'refs/' + $get_branch_refs()[x] + '/' prefix
2606         # (fullname) to differentiate from tag links; this also makes
2607         # possible to detect branch links
2608         for my $ref (get_branch_refs()) {
2609                 if ((defined $hash_base && $hash_base =~ m!^refs/\Q$ref\E/(.*)$!) ||
2610                     (defined $hash      && $hash      =~ m!^refs/\Q$ref\E/(.*)$!)) {
2611                         $branch = $1;
2612                         $matched_ref = $ref;
2613                         last;
2614                 }
2615         }
2616         # find log type for feed description (title)
2617         my $type = 'log';
2618         if (defined $file_name) {
2619                 $type  = "history of $file_name";
2620                 $type .= "/" if ($action eq 'tree');
2621                 $type .= " on '$branch'" if (defined $branch);
2622         } else {
2623                 $type = "log of $branch" if (defined $branch);
2624         }
2625
2626         $res{-title} = $type;
2627         $res{'hash'} = (defined $branch ? "refs/$matched_ref/$branch" : undef);
2628         $res{'file_name'} = $file_name;
2629
2630         return %res;
2631 }
2632
2633 ## ----------------------------------------------------------------------
2634 ## git utility subroutines, invoking git commands
2635
2636 # returns path to the core git executable and the --git-dir parameter as list
2637 sub git_cmd {
2638         $number_of_git_cmds++;
2639         return $GIT, '--git-dir='.$git_dir;
2640 }
2641
2642 # quote the given arguments for passing them to the shell
2643 # quote_command("command", "arg 1", "arg with ' and ! characters")
2644 # => "'command' 'arg 1' 'arg with '\'' and '\!' characters'"
2645 # Try to avoid using this function wherever possible.
2646 sub quote_command {
2647         return join(' ',
2648                 map { my $a = $_; $a =~ s/(['!])/'\\$1'/g; "'$a'" } @_ );
2649 }
2650
2651 # get HEAD ref of given project as hash
2652 sub git_get_head_hash {
2653         return git_get_full_hash(shift, 'HEAD');
2654 }
2655
2656 sub git_get_full_hash {
2657         return git_get_hash(@_);
2658 }
2659
2660 sub git_get_short_hash {
2661         return git_get_hash(@_, '--short=7');
2662 }
2663
2664 sub git_get_hash {
2665         my ($project, $hash, @options) = @_;
2666         my $o_git_dir = $git_dir;
2667         my $retval = undef;
2668         $git_dir = "$projectroot/$project";
2669         if (open my $fd, '-|', git_cmd(), 'rev-parse',
2670             '--verify', '-q', @options, $hash) {
2671                 $retval = <$fd>;
2672                 chomp $retval if defined $retval;
2673                 close $fd;
2674         }
2675         if (defined $o_git_dir) {
2676                 $git_dir = $o_git_dir;
2677         }
2678         return $retval;
2679 }
2680
2681 # get type of given object
2682 sub git_get_type {
2683         my $hash = shift;
2684
2685         open my $fd, "-|", git_cmd(), "cat-file", '-t', $hash or return;
2686         my $type = <$fd>;
2687         close $fd or return;
2688         chomp $type;
2689         return $type;
2690 }
2691
2692 # repository configuration
2693 our $config_file = '';
2694 our %config;
2695
2696 # store multiple values for single key as anonymous array reference
2697 # single values stored directly in the hash, not as [ <value> ]
2698 sub hash_set_multi {
2699         my ($hash, $key, $value) = @_;
2700
2701         if (!exists $hash->{$key}) {
2702                 $hash->{$key} = $value;
2703         } elsif (!ref $hash->{$key}) {
2704                 $hash->{$key} = [ $hash->{$key}, $value ];
2705         } else {
2706                 push @{$hash->{$key}}, $value;
2707         }
2708 }
2709
2710 # return hash of git project configuration
2711 # optionally limited to some section, e.g. 'gitweb'
2712 sub git_parse_project_config {
2713         my $section_regexp = shift;
2714         my %config;
2715
2716         local $/ = "\0";
2717
2718         open my $fh, "-|", git_cmd(), "config", '-z', '-l',
2719                 or return;
2720
2721         while (my $keyval = <$fh>) {
2722                 chomp $keyval;
2723                 my ($key, $value) = split(/\n/, $keyval, 2);
2724
2725                 hash_set_multi(\%config, $key, $value)
2726                         if (!defined $section_regexp || $key =~ /^(?:$section_regexp)\./o);
2727         }
2728         close $fh;
2729
2730         return %config;
2731 }
2732
2733 # convert config value to boolean: 'true' or 'false'
2734 # no value, number > 0, 'true' and 'yes' values are true
2735 # rest of values are treated as false (never as error)
2736 sub config_to_bool {
2737         my $val = shift;
2738
2739         return 1 if !defined $val;             # section.key
2740
2741         # strip leading and trailing whitespace
2742         $val =~ s/^\s+//;
2743         $val =~ s/\s+$//;
2744
2745         return (($val =~ /^\d+$/ && $val) ||   # section.key = 1
2746                 ($val =~ /^(?:true|yes)$/i));  # section.key = true
2747 }
2748
2749 # convert config value to simple decimal number
2750 # an optional value suffix of 'k', 'm', or 'g' will cause the value
2751 # to be multiplied by 1024, 1048576, or 1073741824
2752 sub config_to_int {
2753         my $val = shift;
2754
2755         # strip leading and trailing whitespace
2756         $val =~ s/^\s+//;
2757         $val =~ s/\s+$//;
2758
2759         if (my ($num, $unit) = ($val =~ /^([0-9]*)([kmg])$/i)) {
2760                 $unit = lc($unit);
2761                 # unknown unit is treated as 1
2762                 return $num * ($unit eq 'g' ? 1073741824 :
2763                                $unit eq 'm' ?    1048576 :
2764                                $unit eq 'k' ?       1024 : 1);
2765         }
2766         return $val;
2767 }
2768
2769 # convert config value to array reference, if needed
2770 sub config_to_multi {
2771         my $val = shift;
2772
2773         return ref($val) ? $val : (defined($val) ? [ $val ] : []);
2774 }
2775
2776 sub git_get_project_config {
2777         my ($key, $type) = @_;
2778
2779         return unless defined $git_dir;
2780
2781         # key sanity check
2782         return unless ($key);
2783         # only subsection, if exists, is case sensitive,
2784         # and not lowercased by 'git config -z -l'
2785         if (my ($hi, $mi, $lo) = ($key =~ /^([^.]*)\.(.*)\.([^.]*)$/)) {
2786                 $lo =~ s/_//g;
2787                 $key = join(".", lc($hi), $mi, lc($lo));
2788                 return if ($lo =~ /\W/ || $hi =~ /\W/);
2789         } else {
2790                 $key = lc($key);
2791                 $key =~ s/_//g;
2792                 return if ($key =~ /\W/);
2793         }
2794         $key =~ s/^gitweb\.//;
2795
2796         # type sanity check
2797         if (defined $type) {
2798                 $type =~ s/^--//;
2799                 $type = undef
2800                         unless ($type eq 'bool' || $type eq 'int');
2801         }
2802
2803         # get config
2804         if (!defined $config_file ||
2805             $config_file ne "$git_dir/config") {
2806                 %config = git_parse_project_config('gitweb');
2807                 $config_file = "$git_dir/config";
2808         }
2809
2810         # check if config variable (key) exists
2811         return unless exists $config{"gitweb.$key"};
2812
2813         # ensure given type
2814         if (!defined $type) {
2815                 return $config{"gitweb.$key"};
2816         } elsif ($type eq 'bool') {
2817                 # backward compatibility: 'git config --bool' returns true/false
2818                 return config_to_bool($config{"gitweb.$key"}) ? 'true' : 'false';
2819         } elsif ($type eq 'int') {
2820                 return config_to_int($config{"gitweb.$key"});
2821         }
2822         return $config{"gitweb.$key"};
2823 }
2824
2825 # get hash of given path at given ref
2826 sub git_get_hash_by_path {
2827         my $base = shift;
2828         my $path = shift || return undef;
2829         my $type = shift;
2830
2831         $path =~ s,/+$,,;
2832
2833         open my $fd, "-|", git_cmd(), "ls-tree", $base, "--", $path
2834                 or die_error(500, "Open git-ls-tree failed");
2835         my $line = <$fd>;
2836         close $fd or return undef;
2837
2838         if (!defined $line) {
2839                 # there is no tree or hash given by $path at $base
2840                 return undef;
2841         }
2842
2843         #'100644 blob 0fa3f3a66fb6a137f6ec2c19351ed4d807070ffa  panic.c'
2844         $line =~ m/^([0-9]+) (.+) ([0-9a-fA-F]{40})\t/;
2845         if (defined $type && $type ne $2) {
2846                 # type doesn't match
2847                 return undef;
2848         }
2849         return $3;
2850 }
2851
2852 # get path of entry with given hash at given tree-ish (ref)
2853 # used to get 'from' filename for combined diff (merge commit) for renames
2854 sub git_get_path_by_hash {
2855         my $base = shift || return;
2856         my $hash = shift || return;
2857
2858         local $/ = "\0";
2859
2860         open my $fd, "-|", git_cmd(), "ls-tree", '-r', '-t', '-z', $base
2861                 or return undef;
2862         while (my $line = <$fd>) {
2863                 chomp $line;
2864
2865                 #'040000 tree 595596a6a9117ddba9fe379b6b012b558bac8423  gitweb'
2866                 #'100644 blob e02e90f0429be0d2a69b76571101f20b8f75530f  gitweb/README'
2867                 if ($line =~ m/(?:[0-9]+) (?:.+) $hash\t(.+)$/) {
2868                         close $fd;
2869                         return $1;
2870                 }
2871         }
2872         close $fd;
2873         return undef;
2874 }
2875
2876 ## ......................................................................
2877 ## git utility functions, directly accessing git repository
2878
2879 # get the value of config variable either from file named as the variable
2880 # itself in the repository ($GIT_DIR/$name file), or from gitweb.$name
2881 # configuration variable in the repository config file.
2882 sub git_get_file_or_project_config {
2883         my ($path, $name) = @_;
2884
2885         $git_dir = "$projectroot/$path";
2886         open my $fd, '<', "$git_dir/$name"
2887                 or return git_get_project_config($name);
2888         my $conf = <$fd>;
2889         close $fd;
2890         if (defined $conf) {
2891                 chomp $conf;
2892         }
2893         return $conf;
2894 }
2895
2896 sub git_get_project_description {
2897         my $path = shift;
2898         return git_get_file_or_project_config($path, 'description');
2899 }
2900
2901 sub git_get_project_category {
2902         my $path = shift;
2903         return git_get_file_or_project_config($path, 'category');
2904 }
2905
2906
2907 # supported formats:
2908 # * $GIT_DIR/ctags/<tagname> file (in 'ctags' subdirectory)
2909 #   - if its contents is a number, use it as tag weight,
2910 #   - otherwise add a tag with weight 1
2911 # * $GIT_DIR/ctags file, each line is a tag (with weight 1)
2912 #   the same value multiple times increases tag weight
2913 # * `gitweb.ctag' multi-valued repo config variable
2914 sub git_get_project_ctags {
2915         my $project = shift;
2916         my $ctags = {};
2917
2918         $git_dir = "$projectroot/$project";
2919         if (opendir my $dh, "$git_dir/ctags") {
2920                 my @files = grep { -f $_ } map { "$git_dir/ctags/$_" } readdir($dh);
2921                 foreach my $tagfile (@files) {
2922                         open my $ct, '<', $tagfile
2923                                 or next;
2924                         my $val = <$ct>;
2925                         chomp $val if $val;
2926                         close $ct;
2927
2928                         (my $ctag = $tagfile) =~ s#.*/##;
2929                         if ($val =~ /^\d+$/) {
2930                                 $ctags->{$ctag} = $val;
2931                         } else {
2932                                 $ctags->{$ctag} = 1;
2933                         }
2934                 }
2935                 closedir $dh;
2936
2937         } elsif (open my $fh, '<', "$git_dir/ctags") {
2938                 while (my $line = <$fh>) {
2939                         chomp $line;
2940                         $ctags->{$line}++ if $line;
2941                 }
2942                 close $fh;
2943
2944         } else {
2945                 my $taglist = config_to_multi(git_get_project_config('ctag'));
2946                 foreach my $tag (@$taglist) {
2947                         $ctags->{$tag}++;
2948                 }
2949         }
2950
2951         return $ctags;
2952 }
2953
2954 # return hash, where keys are content tags ('ctags'),
2955 # and values are sum of weights of given tag in every project
2956 sub git_gather_all_ctags {
2957         my $projects = shift;
2958         my $ctags = {};
2959
2960         foreach my $p (@$projects) {
2961                 foreach my $ct (keys %{$p->{'ctags'}}) {
2962                         $ctags->{$ct} += $p->{'ctags'}->{$ct};
2963                 }
2964         }
2965
2966         return $ctags;
2967 }
2968
2969 sub git_populate_project_tagcloud {
2970         my $ctags = shift;
2971
2972         # First, merge different-cased tags; tags vote on casing
2973         my %ctags_lc;
2974         foreach (keys %$ctags) {
2975                 $ctags_lc{lc $_}->{count} += $ctags->{$_};
2976                 if (not $ctags_lc{lc $_}->{topcount}
2977                     or $ctags_lc{lc $_}->{topcount} < $ctags->{$_}) {
2978                         $ctags_lc{lc $_}->{topcount} = $ctags->{$_};
2979                         $ctags_lc{lc $_}->{topname} = $_;
2980                 }
2981         }
2982
2983         my $cloud;
2984         my $matched = $input_params{'ctag'};
2985         if (eval { require HTML::TagCloud; 1; }) {
2986                 $cloud = HTML::TagCloud->new;
2987                 foreach my $ctag (sort keys %ctags_lc) {
2988                         # Pad the title with spaces so that the cloud looks
2989                         # less crammed.
2990                         my $title = esc_html($ctags_lc{$ctag}->{topname});
2991                         $title =~ s/ /&nbsp;/g;
2992                         $title =~ s/^/&nbsp;/g;
2993                         $title =~ s/$/&nbsp;/g;
2994                         if (defined $matched && $matched eq $ctag) {
2995                                 $title = qq(<span class="match">$title</span>);
2996                         }
2997                         $cloud->add($title, href(project=>undef, ctag=>$ctag),
2998                                     $ctags_lc{$ctag}->{count});
2999                 }
3000         } else {
3001                 $cloud = {};
3002                 foreach my $ctag (keys %ctags_lc) {
3003                         my $title = esc_html($ctags_lc{$ctag}->{topname}, -nbsp=>1);
3004                         if (defined $matched && $matched eq $ctag) {
3005                                 $title = qq(<span class="match">$title</span>);
3006                         }
3007                         $cloud->{$ctag}{count} = $ctags_lc{$ctag}->{count};
3008                         $cloud->{$ctag}{ctag} =
3009                                 $cgi->a({-href=>href(project=>undef, ctag=>$ctag)}, $title);
3010                 }
3011         }
3012         return $cloud;
3013 }
3014
3015 sub git_show_project_tagcloud {
3016         my ($cloud, $count) = @_;
3017         if (ref $cloud eq 'HTML::TagCloud') {
3018                 return $cloud->html_and_css($count);
3019         } else {
3020                 my @tags = sort { $cloud->{$a}->{'count'} <=> $cloud->{$b}->{'count'} } keys %$cloud;
3021                 return
3022                         '<div id="htmltagcloud"'.($project ? '' : ' align="center"').'>' .
3023                         join (', ', map {
3024                                 $cloud->{$_}->{'ctag'}
3025                         } splice(@tags, 0, $count)) .
3026                         '</div>';
3027         }
3028 }
3029
3030 sub git_get_project_url_list {
3031         my $path = shift;
3032
3033         $git_dir = "$projectroot/$path";
3034         open my $fd, '<', "$git_dir/cloneurl"
3035                 or return wantarray ?
3036                 @{ config_to_multi(git_get_project_config('url')) } :
3037                    config_to_multi(git_get_project_config('url'));
3038         my @git_project_url_list = map { chomp; $_ } <$fd>;
3039         close $fd;
3040
3041         return wantarray ? @git_project_url_list : \@git_project_url_list;
3042 }
3043
3044 sub git_get_projects_list {
3045         my $filter = shift || '';
3046         my $paranoid = shift;
3047         my @list;
3048
3049         if (-d $projects_list) {
3050                 # search in directory
3051                 my $dir = $projects_list;
3052                 # remove the trailing "/"
3053                 $dir =~ s!/+$!!;
3054                 my $pfxlen = length("$dir");
3055                 my $pfxdepth = ($dir =~ tr!/!!);
3056                 # when filtering, search only given subdirectory
3057                 if ($filter && !$paranoid) {
3058                         $dir .= "/$filter";
3059                         $dir =~ s!/+$!!;
3060                 }
3061
3062                 File::Find::find({
3063                         follow_fast => 1, # follow symbolic links
3064                         follow_skip => 2, # ignore duplicates
3065                         dangling_symlinks => 0, # ignore dangling symlinks, silently
3066                         wanted => sub {
3067                                 # global variables
3068                                 our $project_maxdepth;
3069                                 our $projectroot;
3070                                 # skip project-list toplevel, if we get it.
3071                                 return if (m!^[/.]$!);
3072                                 # only directories can be git repositories
3073                                 return unless (-d $_);
3074                                 # need search permission
3075                                 return unless (-x $_);
3076                                 # don't traverse too deep (Find is super slow on os x)
3077                                 # $project_maxdepth excludes depth of $projectroot
3078                                 if (($File::Find::name =~ tr!/!!) - $pfxdepth > $project_maxdepth) {
3079                                         $File::Find::prune = 1;
3080                                         return;
3081                                 }
3082
3083                                 my $path = substr($File::Find::name, $pfxlen + 1);
3084                                 # paranoidly only filter here
3085                                 if ($paranoid && $filter && $path !~ m!^\Q$filter\E/!) {
3086                                         next;
3087                                 }
3088                                 # we check related file in $projectroot
3089                                 if (check_export_ok("$projectroot/$path")) {
3090                                         push @list, { path => $path };
3091                                         $File::Find::prune = 1;
3092                                 }
3093                         },
3094                 }, "$dir");
3095
3096         } elsif (-f $projects_list) {
3097                 # read from file(url-encoded):
3098                 # 'git%2Fgit.git Linus+Torvalds'
3099                 # 'libs%2Fklibc%2Fklibc.git H.+Peter+Anvin'
3100                 # 'linux%2Fhotplug%2Fudev.git Greg+Kroah-Hartman'
3101                 open my $fd, '<', $projects_list or return;
3102         PROJECT:
3103                 while (my $line = <$fd>) {
3104                         chomp $line;
3105                         my ($path, $owner) = split ' ', $line;
3106                         $path = unescape($path);
3107                         $owner = unescape($owner);
3108                         if (!defined $path) {
3109                                 next;
3110                         }
3111                         # if $filter is rpovided, check if $path begins with $filter
3112                         if ($filter && $path !~ m!^\Q$filter\E/!) {
3113                                 next;
3114                         }
3115                         if (check_export_ok("$projectroot/$path")) {
3116                                 my $pr = {
3117                                         path => $path
3118                                 };
3119                                 if ($owner) {
3120                                         $pr->{'owner'} = to_utf8($owner);
3121                                 }
3122                                 push @list, $pr;
3123                         }
3124                 }
3125                 close $fd;
3126         }
3127         return @list;
3128 }
3129
3130 # written with help of Tree::Trie module (Perl Artistic License, GPL compatible)
3131 # as side effects it sets 'forks' field to list of forks for forked projects
3132 sub filter_forks_from_projects_list {
3133         my $projects = shift;
3134
3135         my %trie; # prefix tree of directories (path components)
3136         # generate trie out of those directories that might contain forks
3137         foreach my $pr (@$projects) {
3138                 my $path = $pr->{'path'};
3139                 $path =~ s/\.git$//;      # forks of 'repo.git' are in 'repo/' directory
3140                 next if ($path =~ m!/$!); # skip non-bare repositories, e.g. 'repo/.git'
3141                 next unless ($path);      # skip '.git' repository: tests, git-instaweb
3142                 next unless (-d "$projectroot/$path"); # containing directory exists
3143                 $pr->{'forks'} = [];      # there can be 0 or more forks of project
3144
3145                 # add to trie
3146                 my @dirs = split('/', $path);
3147                 # walk the trie, until either runs out of components or out of trie
3148                 my $ref = \%trie;
3149                 while (scalar @dirs &&
3150                        exists($ref->{$dirs[0]})) {
3151                         $ref = $ref->{shift @dirs};
3152                 }
3153                 # create rest of trie structure from rest of components
3154                 foreach my $dir (@dirs) {
3155                         $ref = $ref->{$dir} = {};
3156                 }
3157                 # create end marker, store $pr as a data
3158                 $ref->{''} = $pr if (!exists $ref->{''});
3159         }
3160
3161         # filter out forks, by finding shortest prefix match for paths
3162         my @filtered;
3163  PROJECT:
3164         foreach my $pr (@$projects) {
3165                 # trie lookup
3166                 my $ref = \%trie;
3167         DIR:
3168                 foreach my $dir (split('/', $pr->{'path'})) {
3169                         if (exists $ref->{''}) {
3170                                 # found [shortest] prefix, is a fork - skip it
3171                                 push @{$ref->{''}{'forks'}}, $pr;
3172                                 next PROJECT;
3173                         }
3174                         if (!exists $ref->{$dir}) {
3175                                 # not in trie, cannot have prefix, not a fork
3176                                 push @filtered, $pr;
3177                                 next PROJECT;
3178                         }
3179                         # If the dir is there, we just walk one step down the trie.
3180                         $ref = $ref->{$dir};
3181                 }
3182                 # we ran out of trie
3183                 # (shouldn't happen: it's either no match, or end marker)
3184                 push @filtered, $pr;
3185         }
3186
3187         return @filtered;
3188 }
3189
3190 # note: fill_project_list_info must be run first,
3191 # for 'descr_long' and 'ctags' to be filled
3192 sub search_projects_list {
3193         my ($projlist, %opts) = @_;
3194         my $tagfilter  = $opts{'tagfilter'};
3195         my $search_re = $opts{'search_regexp'};
3196
3197         return @$projlist
3198                 unless ($tagfilter || $search_re);
3199
3200         # searching projects require filling to be run before it;
3201         fill_project_list_info($projlist,
3202                                $tagfilter  ? 'ctags' : (),
3203                                $search_re ? ('path', 'descr') : ());
3204         my @projects;
3205  PROJECT:
3206         foreach my $pr (@$projlist) {
3207
3208                 if ($tagfilter) {
3209                         next unless ref($pr->{'ctags'}) eq 'HASH';
3210                         next unless
3211                                 grep { lc($_) eq lc($tagfilter) } keys %{$pr->{'ctags'}};
3212                 }
3213
3214                 if ($search_re) {
3215                         next unless
3216                                 $pr->{'path'} =~ /$search_re/ ||
3217                                 $pr->{'descr_long'} =~ /$search_re/;
3218                 }
3219
3220                 push @projects, $pr;
3221         }
3222
3223         return @projects;
3224 }
3225
3226 our $gitweb_project_owner = undef;
3227 sub git_get_project_list_from_file {
3228
3229         return if (defined $gitweb_project_owner);
3230
3231         $gitweb_project_owner = {};
3232         # read from file (url-encoded):
3233         # 'git%2Fgit.git Linus+Torvalds'
3234         # 'libs%2Fklibc%2Fklibc.git H.+Peter+Anvin'
3235         # 'linux%2Fhotplug%2Fudev.git Greg+Kroah-Hartman'
3236         if (-f $projects_list) {
3237                 open(my $fd, '<', $projects_list);
3238                 while (my $line = <$fd>) {
3239                         chomp $line;
3240                         my ($pr, $ow) = split ' ', $line;
3241                         $pr = unescape($pr);
3242                         $ow = unescape($ow);
3243                         $gitweb_project_owner->{$pr} = to_utf8($ow);
3244                 }
3245                 close $fd;
3246         }
3247 }
3248
3249 sub git_get_project_owner {
3250         my $project = shift;
3251         my $owner;
3252
3253         return undef unless $project;
3254         $git_dir = "$projectroot/$project";
3255
3256         if (!defined $gitweb_project_owner) {
3257                 git_get_project_list_from_file();
3258         }
3259
3260         if (exists $gitweb_project_owner->{$project}) {
3261                 $owner = $gitweb_project_owner->{$project};
3262         }
3263         if (!defined $owner){
3264                 $owner = git_get_project_config('owner');
3265         }
3266         if (!defined $owner) {
3267                 $owner = get_file_owner("$git_dir");
3268         }
3269
3270         return $owner;
3271 }
3272
3273 sub git_get_last_activity {
3274         my ($path) = @_;
3275         my $fd;
3276
3277         $git_dir = "$projectroot/$path";
3278         open($fd, "-|", git_cmd(), 'for-each-ref',
3279              '--format=%(committer)',
3280              '--sort=-committerdate',
3281              '--count=1',
3282              map { "refs/$_" } get_branch_refs ()) or return;
3283         my $most_recent = <$fd>;
3284         close $fd or return;
3285         if (defined $most_recent &&
3286             $most_recent =~ / (\d+) [-+][01]\d\d\d$/) {
3287                 my $timestamp = $1;
3288                 my $age = time - $timestamp;
3289                 return ($age, age_string($age));
3290         }
3291         return (undef, undef);
3292 }
3293
3294 # Implementation note: when a single remote is wanted, we cannot use 'git
3295 # remote show -n' because that command always work (assuming it's a remote URL
3296 # if it's not defined), and we cannot use 'git remote show' because that would
3297 # try to make a network roundtrip. So the only way to find if that particular
3298 # remote is defined is to walk the list provided by 'git remote -v' and stop if
3299 # and when we find what we want.
3300 sub git_get_remotes_list {
3301         my $wanted = shift;
3302         my %remotes = ();
3303
3304         open my $fd, '-|' , git_cmd(), 'remote', '-v';
3305         return unless $fd;
3306         while (my $remote = <$fd>) {
3307                 chomp $remote;
3308                 $remote =~ s!\t(.*?)\s+\((\w+)\)$!!;
3309                 next if $wanted and not $remote eq $wanted;
3310                 my ($url, $key) = ($1, $2);
3311
3312                 $remotes{$remote} ||= { 'heads' => () };
3313                 $remotes{$remote}{$key} = $url;
3314         }
3315         close $fd or return;
3316         return wantarray ? %remotes : \%remotes;
3317 }
3318
3319 # Takes a hash of remotes as first parameter and fills it by adding the
3320 # available remote heads for each of the indicated remotes.
3321 sub fill_remote_heads {
3322         my $remotes = shift;
3323         my @heads = map { "remotes/$_" } keys %$remotes;
3324         my @remoteheads = git_get_heads_list(undef, @heads);
3325         foreach my $remote (keys %$remotes) {
3326                 $remotes->{$remote}{'heads'} = [ grep {
3327                         $_->{'name'} =~ s!^$remote/!!
3328                         } @remoteheads ];
3329         }
3330 }
3331
3332 sub git_get_references {
3333         my $type = shift || "";
3334         my %refs;
3335         # 5dc01c595e6c6ec9ccda4f6f69c131c0dd945f8c refs/tags/v2.6.11
3336         # c39ae07f393806ccf406ef966e9a15afc43cc36a refs/tags/v2.6.11^{}
3337         open my $fd, "-|", git_cmd(), "show-ref", "--dereference",
3338                 ($type ? ("--", "refs/$type") : ()) # use -- <pattern> if $type
3339                 or return;
3340
3341         while (my $line = <$fd>) {
3342                 chomp $line;
3343                 if ($line =~ m!^([0-9a-fA-F]{40})\srefs/($type.*)$!) {
3344                         if (defined $refs{$1}) {
3345                                 push @{$refs{$1}}, $2;
3346                         } else {
3347                                 $refs{$1} = [ $2 ];
3348                         }
3349                 }
3350         }
3351         close $fd or return;
3352         return \%refs;
3353 }
3354
3355 sub git_get_rev_name_tags {
3356         my $hash = shift || return undef;
3357
3358         open my $fd, "-|", git_cmd(), "name-rev", "--tags", $hash
3359                 or return;
3360         my $name_rev = <$fd>;
3361         close $fd;
3362
3363         if ($name_rev =~ m|^$hash tags/(.*)$|) {
3364                 return $1;
3365         } else {
3366                 # catches also '$hash undefined' output
3367                 return undef;
3368         }
3369 }
3370
3371 ## ----------------------------------------------------------------------
3372 ## parse to hash functions
3373
3374 sub parse_date {
3375         my $epoch = shift;
3376         my $tz = shift || "-0000";
3377
3378         my %date;
3379         my @months = ("Jan", "Feb", "Mar", "Apr", "May", "Jun", "Jul", "Aug", "Sep", "Oct", "Nov", "Dec");
3380         my @days = ("Sun", "Mon", "Tue", "Wed", "Thu", "Fri", "Sat");
3381         my ($sec, $min, $hour, $mday, $mon, $year, $wday, $yday) = gmtime($epoch);
3382         $date{'hour'} = $hour;
3383         $date{'minute'} = $min;
3384         $date{'mday'} = $mday;
3385         $date{'day'} = $days[$wday];
3386         $date{'month'} = $months[$mon];
3387         $date{'rfc2822'}   = sprintf "%s, %d %s %4d %02d:%02d:%02d +0000",
3388                              $days[$wday], $mday, $months[$mon], 1900+$year, $hour ,$min, $sec;
3389         $date{'mday-time'} = sprintf "%d %s %02d:%02d",
3390                              $mday, $months[$mon], $hour ,$min;
3391         $date{'iso-8601'}  = sprintf "%04d-%02d-%02dT%02d:%02d:%02dZ",
3392                              1900+$year, 1+$mon, $mday, $hour ,$min, $sec;
3393
3394         my ($tz_sign, $tz_hour, $tz_min) =
3395                 ($tz =~ m/^([-+])(\d\d)(\d\d)$/);
3396         $tz_sign = ($tz_sign eq '-' ? -1 : +1);
3397         my $local = $epoch + $tz_sign*((($tz_hour*60) + $tz_min)*60);
3398         ($sec, $min, $hour, $mday, $mon, $year, $wday, $yday) = gmtime($local);
3399         $date{'hour_local'} = $hour;
3400         $date{'minute_local'} = $min;
3401         $date{'tz_local'} = $tz;
3402         $date{'iso-tz'} = sprintf("%04d-%02d-%02d %02d:%02d:%02d %s",
3403                                   1900+$year, $mon+1, $mday,
3404                                   $hour, $min, $sec, $tz);
3405         return %date;
3406 }
3407
3408 sub parse_tag {
3409         my $tag_id = shift;
3410         my %tag;
3411         my @comment;
3412
3413         open my $fd, "-|", git_cmd(), "cat-file", "tag", $tag_id or return;
3414         $tag{'id'} = $tag_id;
3415         while (my $line = <$fd>) {
3416                 chomp $line;
3417                 if ($line =~ m/^object ([0-9a-fA-F]{40})$/) {
3418                         $tag{'object'} = $1;
3419                 } elsif ($line =~ m/^type (.+)$/) {
3420                         $tag{'type'} = $1;
3421                 } elsif ($line =~ m/^tag (.+)$/) {
3422                         $tag{'name'} = $1;
3423                 } elsif ($line =~ m/^tagger (.*) ([0-9]+) (.*)$/) {
3424                         $tag{'author'} = $1;
3425                         $tag{'author_epoch'} = $2;
3426                         $tag{'author_tz'} = $3;
3427                         if ($tag{'author'} =~ m/^([^<]+) <([^>]*)>/) {
3428                                 $tag{'author_name'}  = $1;
3429                                 $tag{'author_email'} = $2;
3430                         } else {
3431                                 $tag{'author_name'} = $tag{'author'};
3432                         }
3433                 } elsif ($line =~ m/--BEGIN/) {
3434                         push @comment, $line;
3435                         last;
3436                 } elsif ($line eq "") {
3437                         last;
3438                 }
3439         }
3440         push @comment, <$fd>;
3441         $tag{'comment'} = \@comment;
3442         close $fd or return;
3443         if (!defined $tag{'name'}) {
3444                 return
3445         };
3446         return %tag
3447 }
3448
3449 sub parse_commit_text {
3450         my ($commit_text, $withparents) = @_;
3451         my @commit_lines = split '\n', $commit_text;
3452         my %co;
3453
3454         pop @commit_lines; # Remove '\0'
3455
3456         if (! @commit_lines) {
3457                 return;
3458         }
3459
3460         my $header = shift @commit_lines;
3461         if ($header !~ m/^[0-9a-fA-F]{40}/) {
3462                 return;
3463         }
3464         ($co{'id'}, my @parents) = split ' ', $header;
3465         while (my $line = shift @commit_lines) {
3466                 last if $line eq "\n";
3467                 if ($line =~ m/^tree ([0-9a-fA-F]{40})$/) {
3468                         $co{'tree'} = $1;
3469                 } elsif ((!defined $withparents) && ($line =~ m/^parent ([0-9a-fA-F]{40})$/)) {
3470                         push @parents, $1;
3471                 } elsif ($line =~ m/^author (.*) ([0-9]+) (.*)$/) {
3472                         $co{'author'} = to_utf8($1);
3473                         $co{'author_epoch'} = $2;
3474                         $co{'author_tz'} = $3;
3475                         if ($co{'author'} =~ m/^([^<]+) <([^>]*)>/) {
3476                                 $co{'author_name'}  = $1;
3477                                 $co{'author_email'} = $2;
3478                         } else {
3479                                 $co{'author_name'} = $co{'author'};
3480                         }
3481                 } elsif ($line =~ m/^committer (.*) ([0-9]+) (.*)$/) {
3482                         $co{'committer'} = to_utf8($1);
3483                         $co{'committer_epoch'} = $2;
3484                         $co{'committer_tz'} = $3;
3485                         if ($co{'committer'} =~ m/^([^<]+) <([^>]*)>/) {
3486                                 $co{'committer_name'}  = $1;
3487                                 $co{'committer_email'} = $2;
3488                         } else {
3489                                 $co{'committer_name'} = $co{'committer'};
3490                         }
3491                 }
3492         }
3493         if (!defined $co{'tree'}) {
3494                 return;
3495         };
3496         $co{'parents'} = \@parents;
3497         $co{'parent'} = $parents[0];
3498
3499         foreach my $title (@commit_lines) {
3500                 $title =~ s/^    //;
3501                 if ($title ne "") {
3502                         $co{'title'} = chop_str($title, 80, 5);
3503                         # remove leading stuff of merges to make the interesting part visible
3504                         if (length($title) > 50) {
3505                                 $title =~ s/^Automatic //;
3506                                 $title =~ s/^merge (of|with) /Merge ... /i;
3507                                 if (length($title) > 50) {
3508                                         $title =~ s/(http|rsync):\/\///;
3509                                 }
3510                                 if (length($title) > 50) {
3511                                         $title =~ s/(master|www|rsync)\.//;
3512                                 }
3513                                 if (length($title) > 50) {
3514                                         $title =~ s/kernel.org:?//;
3515                                 }
3516                                 if (length($title) > 50) {
3517                                         $title =~ s/\/pub\/scm//;
3518                                 }
3519                         }
3520                         $co{'title_short'} = chop_str($title, 50, 5);
3521                         last;
3522                 }
3523         }
3524         if (! defined $co{'title'} || $co{'title'} eq "") {
3525                 $co{'title'} = $co{'title_short'} = '(no commit message)';
3526         }
3527         # remove added spaces
3528         foreach my $line (@commit_lines) {
3529                 $line =~ s/^    //;
3530         }
3531         $co{'comment'} = \@commit_lines;
3532
3533         my $age = time - $co{'committer_epoch'};
3534         $co{'age'} = $age;
3535         $co{'age_string'} = age_string($age);
3536         my ($sec, $min, $hour, $mday, $mon, $year, $wday, $yday) = gmtime($co{'committer_epoch'});
3537         if ($age > 60*60*24*7*2) {
3538                 $co{'age_string_date'} = sprintf "%4i-%02u-%02i", 1900 + $year, $mon+1, $mday;
3539                 $co{'age_string_age'} = $co{'age_string'};
3540         } else {
3541                 $co{'age_string_date'} = $co{'age_string'};
3542                 $co{'age_string_age'} = sprintf "%4i-%02u-%02i", 1900 + $year, $mon+1, $mday;
3543         }
3544         return %co;
3545 }
3546
3547 sub parse_commit {
3548         my ($commit_id) = @_;
3549         my %co;
3550
3551         local $/ = "\0";
3552
3553         open my $fd, "-|", git_cmd(), "rev-list",
3554                 "--parents",
3555                 "--header",
3556                 "--max-count=1",
3557                 $commit_id,
3558                 "--",
3559                 or die_error(500, "Open git-rev-list failed");
3560         %co = parse_commit_text(<$fd>, 1);
3561         close $fd;
3562
3563         return %co;
3564 }
3565
3566 sub parse_commits {
3567         my ($commit_id, $maxcount, $skip, $filename, @args) = @_;
3568         my @cos;
3569
3570         $maxcount ||= 1;
3571         $skip ||= 0;
3572
3573         local $/ = "\0";
3574
3575         open my $fd, "-|", git_cmd(), "rev-list",
3576                 "--header",
3577                 @args,
3578                 ("--max-count=" . $maxcount),
3579                 ("--skip=" . $skip),
3580                 @extra_options,
3581                 $commit_id,
3582                 "--",
3583                 ($filename ? ($filename) : ())
3584                 or die_error(500, "Open git-rev-list failed");
3585         while (my $line = <$fd>) {
3586                 my %co = parse_commit_text($line);
3587                 push @cos, \%co;
3588         }
3589         close $fd;
3590
3591         return wantarray ? @cos : \@cos;
3592 }
3593
3594 # parse line of git-diff-tree "raw" output
3595 sub parse_difftree_raw_line {
3596         my $line = shift;
3597         my %res;
3598
3599         # ':100644 100644 03b218260e99b78c6df0ed378e59ed9205ccc96d 3b93d5e7cc7f7dd4ebed13a5cc1a4ad976fc94d8 M   ls-files.c'
3600         # ':100644 100644 7f9281985086971d3877aca27704f2aaf9c448ce bc190ebc71bbd923f2b728e505408f5e54bd073a M   rev-tree.c'
3601         if ($line =~ m/^:([0-7]{6}) ([0-7]{6}) ([0-9a-fA-F]{40}) ([0-9a-fA-F]{40}) (.)([0-9]{0,3})\t(.*)$/) {
3602                 $res{'from_mode'} = $1;
3603                 $res{'to_mode'} = $2;
3604                 $res{'from_id'} = $3;
3605                 $res{'to_id'} = $4;
3606                 $res{'status'} = $5;
3607                 $res{'similarity'} = $6;
3608                 if ($res{'status'} eq 'R' || $res{'status'} eq 'C') { # renamed or copied
3609                         ($res{'from_file'}, $res{'to_file'}) = map { unquote($_) } split("\t", $7);
3610                 } else {
3611                         $res{'from_file'} = $res{'to_file'} = $res{'file'} = unquote($7);
3612                 }
3613         }
3614         # '::100755 100755 100755 60e79ca1b01bc8b057abe17ddab484699a7f5fdb 94067cc5f73388f33722d52ae02f44692bc07490 94067cc5f73388f33722d52ae02f44692bc07490 MR git-gui/git-gui.sh'
3615         # combined diff (for merge commit)
3616         elsif ($line =~ s/^(::+)((?:[0-7]{6} )+)((?:[0-9a-fA-F]{40} )+)([a-zA-Z]+)\t(.*)$//) {
3617                 $res{'nparents'}  = length($1);
3618                 $res{'from_mode'} = [ split(' ', $2) ];
3619                 $res{'to_mode'} = pop @{$res{'from_mode'}};
3620                 $res{'from_id'} = [ split(' ', $3) ];
3621                 $res{'to_id'} = pop @{$res{'from_id'}};
3622                 $res{'status'} = [ split('', $4) ];
3623                 $res{'to_file'} = unquote($5);
3624         }
3625         # 'c512b523472485aef4fff9e57b229d9d243c967f'
3626         elsif ($line =~ m/^([0-9a-fA-F]{40})$/) {
3627                 $res{'commit'} = $1;
3628         }
3629
3630         return wantarray ? %res : \%res;
3631 }
3632
3633 # wrapper: return parsed line of git-diff-tree "raw" output
3634 # (the argument might be raw line, or parsed info)
3635 sub parsed_difftree_line {
3636         my $line_or_ref = shift;
3637
3638         if (ref($line_or_ref) eq "HASH") {
3639                 # pre-parsed (or generated by hand)
3640                 return $line_or_ref;
3641         } else {
3642                 return parse_difftree_raw_line($line_or_ref);
3643         }
3644 }
3645
3646 # parse line of git-ls-tree output
3647 sub parse_ls_tree_line {
3648         my $line = shift;
3649         my %opts = @_;
3650         my %res;
3651
3652         if ($opts{'-l'}) {
3653                 #'100644 blob 0fa3f3a66fb6a137f6ec2c19351ed4d807070ffa   16717  panic.c'
3654                 $line =~ m/^([0-9]+) (.+) ([0-9a-fA-F]{40}) +(-|[0-9]+)\t(.+)$/s;
3655
3656                 $res{'mode'} = $1;
3657                 $res{'type'} = $2;
3658                 $res{'hash'} = $3;
3659                 $res{'size'} = $4;
3660                 if ($opts{'-z'}) {
3661                         $res{'name'} = $5;
3662                 } else {
3663                         $res{'name'} = unquote($5);
3664                 }
3665         } else {
3666                 #'100644 blob 0fa3f3a66fb6a137f6ec2c19351ed4d807070ffa  panic.c'
3667                 $line =~ m/^([0-9]+) (.+) ([0-9a-fA-F]{40})\t(.+)$/s;
3668
3669                 $res{'mode'} = $1;
3670                 $res{'type'} = $2;
3671                 $res{'hash'} = $3;
3672                 if ($opts{'-z'}) {
3673                         $res{'name'} = $4;
3674                 } else {
3675                         $res{'name'} = unquote($4);
3676                 }
3677         }
3678
3679         return wantarray ? %res : \%res;
3680 }
3681
3682 # generates _two_ hashes, references to which are passed as 2 and 3 argument
3683 sub parse_from_to_diffinfo {
3684         my ($diffinfo, $from, $to, @parents) = @_;
3685
3686         if ($diffinfo->{'nparents'}) {
3687                 # combined diff
3688                 $from->{'file'} = [];
3689                 $from->{'href'} = [];
3690                 fill_from_file_info($diffinfo, @parents)
3691                         unless exists $diffinfo->{'from_file'};
3692                 for (my $i = 0; $i < $diffinfo->{'nparents'}; $i++) {
3693                         $from->{'file'}[$i] =
3694                                 defined $diffinfo->{'from_file'}[$i] ?
3695                                         $diffinfo->{'from_file'}[$i] :
3696                                         $diffinfo->{'to_file'};
3697                         if ($diffinfo->{'status'}[$i] ne "A") { # not new (added) file
3698                                 $from->{'href'}[$i] = href(action=>"blob",
3699                                                            hash_base=>$parents[$i],
3700                                                            hash=>$diffinfo->{'from_id'}[$i],
3701                                                            file_name=>$from->{'file'}[$i]);
3702                         } else {
3703                                 $from->{'href'}[$i] = undef;
3704                         }
3705                 }
3706         } else {
3707                 # ordinary (not combined) diff
3708                 $from->{'file'} = $diffinfo->{'from_file'};
3709                 if ($diffinfo->{'status'} ne "A") { # not new (added) file
3710                         $from->{'href'} = href(action=>"blob", hash_base=>$hash_parent,
3711                                                hash=>$diffinfo->{'from_id'},
3712                                                file_name=>$from->{'file'});
3713                 } else {
3714                         delete $from->{'href'};
3715                 }
3716         }
3717
3718         $to->{'file'} = $diffinfo->{'to_file'};
3719         if (!is_deleted($diffinfo)) { # file exists in result
3720                 $to->{'href'} = href(action=>"blob", hash_base=>$hash,
3721                                      hash=>$diffinfo->{'to_id'},
3722                                      file_name=>$to->{'file'});
3723         } else {
3724                 delete $to->{'href'};
3725         }
3726 }
3727
3728 ## ......................................................................
3729 ## parse to array of hashes functions
3730
3731 sub git_get_heads_list {
3732         my ($limit, @classes) = @_;
3733         @classes = get_branch_refs() unless @classes;
3734         my @patterns = map { "refs/$_" } @classes;
3735         my @headslist;
3736
3737         open my $fd, '-|', git_cmd(), 'for-each-ref',
3738                 ($limit ? '--count='.($limit+1) : ()), '--sort=-committerdate',
3739                 '--format=%(objectname) %(refname) %(subject)%00%(committer)',
3740                 @patterns
3741                 or return;
3742         while (my $line = <$fd>) {
3743                 my %ref_item;
3744
3745                 chomp $line;
3746                 my ($refinfo, $committerinfo) = split(/\0/, $line);
3747                 my ($hash, $name, $title) = split(' ', $refinfo, 3);
3748                 my ($committer, $epoch, $tz) =
3749                         ($committerinfo =~ /^(.*) ([0-9]+) (.*)$/);
3750                 $ref_item{'fullname'}  = $name;
3751                 my $strip_refs = join '|', map { quotemeta } get_branch_refs();
3752                 $name =~ s!^refs/($strip_refs|remotes)/!!;
3753                 $ref_item{'name'} = $name;
3754                 # for refs neither in 'heads' nor 'remotes' we want to
3755                 # show their ref dir
3756                 my $ref_dir = (defined $1) ? $1 : '';
3757                 if ($ref_dir ne '' and $ref_dir ne 'heads' and $ref_dir ne 'remotes') {
3758                     $ref_item{'name'} .= ' (' . $ref_dir . ')';
3759                 }
3760
3761                 $ref_item{'id'}    = $hash;
3762                 $ref_item{'title'} = $title || '(no commit message)';
3763                 $ref_item{'epoch'} = $epoch;
3764                 if ($epoch) {
3765                         $ref_item{'age'} = age_string(time - $ref_item{'epoch'});
3766                 } else {
3767                         $ref_item{'age'} = "unknown";
3768                 }
3769
3770                 push @headslist, \%ref_item;
3771         }
3772         close $fd;
3773
3774         return wantarray ? @headslist : \@headslist;
3775 }
3776
3777 sub git_get_tags_list {
3778         my $limit = shift;
3779         my @tagslist;
3780
3781         open my $fd, '-|', git_cmd(), 'for-each-ref',
3782                 ($limit ? '--count='.($limit+1) : ()), '--sort=-creatordate',
3783                 '--format=%(objectname) %(objecttype) %(refname) '.
3784                 '%(*objectname) %(*objecttype) %(subject)%00%(creator)',
3785                 'refs/tags'
3786                 or return;
3787         while (my $line = <$fd>) {
3788                 my %ref_item;
3789
3790                 chomp $line;
3791                 my ($refinfo, $creatorinfo) = split(/\0/, $line);
3792                 my ($id, $type, $name, $refid, $reftype, $title) = split(' ', $refinfo, 6);
3793                 my ($creator, $epoch, $tz) =
3794                         ($creatorinfo =~ /^(.*) ([0-9]+) (.*)$/);
3795                 $ref_item{'fullname'} = $name;
3796                 $name =~ s!^refs/tags/!!;
3797
3798                 $ref_item{'type'} = $type;
3799                 $ref_item{'id'} = $id;
3800                 $ref_item{'name'} = $name;
3801                 if ($type eq "tag") {
3802                         $ref_item{'subject'} = $title;
3803                         $ref_item{'reftype'} = $reftype;
3804                         $ref_item{'refid'}   = $refid;
3805                 } else {
3806                         $ref_item{'reftype'} = $type;
3807                         $ref_item{'refid'}   = $id;
3808                 }
3809
3810                 if ($type eq "tag" || $type eq "commit") {
3811                         $ref_item{'epoch'} = $epoch;
3812                         if ($epoch) {
3813                                 $ref_item{'age'} = age_string(time - $ref_item{'epoch'});
3814                         } else {
3815                                 $ref_item{'age'} = "unknown";
3816                         }
3817                 }
3818
3819                 push @tagslist, \%ref_item;
3820         }
3821         close $fd;
3822
3823         return wantarray ? @tagslist : \@tagslist;
3824 }
3825
3826 ## ----------------------------------------------------------------------
3827 ## filesystem-related functions
3828
3829 sub get_file_owner {
3830         my $path = shift;
3831
3832         my ($dev, $ino, $mode, $nlink, $st_uid, $st_gid, $rdev, $size) = stat($path);
3833         my ($name, $passwd, $uid, $gid, $quota, $comment, $gcos, $dir, $shell) = getpwuid($st_uid);
3834         if (!defined $gcos) {
3835                 return undef;
3836         }
3837         my $owner = $gcos;
3838         $owner =~ s/[,;].*$//;
3839         return to_utf8($owner);
3840 }
3841
3842 # assume that file exists
3843 sub insert_file {
3844         my $filename = shift;
3845
3846         open my $fd, '<', $filename;
3847         print map { to_utf8($_) } <$fd>;
3848         close $fd;
3849 }
3850
3851 ## ......................................................................
3852 ## mimetype related functions
3853
3854 sub mimetype_guess_file {
3855         my $filename = shift;
3856         my $mimemap = shift;
3857         -r $mimemap or return undef;
3858
3859         my %mimemap;
3860         open(my $mh, '<', $mimemap) or return undef;
3861         while (<$mh>) {
3862                 next if m/^#/; # skip comments
3863                 my ($mimetype, @exts) = split(/\s+/);
3864                 foreach my $ext (@exts) {
3865                         $mimemap{$ext} = $mimetype;
3866                 }
3867         }
3868         close($mh);
3869
3870         $filename =~ /\.([^.]*)$/;
3871         return $mimemap{$1};
3872 }
3873
3874 sub mimetype_guess {
3875         my $filename = shift;
3876         my $mime;
3877         $filename =~ /\./ or return undef;
3878
3879         if ($mimetypes_file) {
3880                 my $file = $mimetypes_file;
3881                 if ($file !~ m!^/!) { # if it is relative path
3882                         # it is relative to project
3883                         $file = "$projectroot/$project/$file";
3884                 }
3885                 $mime = mimetype_guess_file($filename, $file);
3886         }
3887         $mime ||= mimetype_guess_file($filename, '/etc/mime.types');
3888         return $mime;
3889 }
3890
3891 sub blob_mimetype {
3892         my $fd = shift;
3893         my $filename = shift;
3894
3895         if ($filename) {
3896                 my $mime = mimetype_guess($filename);
3897                 $mime and return $mime;
3898         }
3899
3900         # just in case
3901         return $default_blob_plain_mimetype unless $fd;
3902
3903         if (-T $fd) {
3904                 return 'text/plain';
3905         } elsif (! $filename) {
3906                 return 'application/octet-stream';
3907         } elsif ($filename =~ m/\.png$/i) {
3908                 return 'image/png';
3909         } elsif ($filename =~ m/\.gif$/i) {
3910                 return 'image/gif';
3911         } elsif ($filename =~ m/\.jpe?g$/i) {
3912                 return 'image/jpeg';
3913         } else {
3914                 return 'application/octet-stream';
3915         }
3916 }
3917
3918 sub blob_contenttype {
3919         my ($fd, $file_name, $type) = @_;
3920
3921         $type ||= blob_mimetype($fd, $file_name);
3922         if ($type eq 'text/plain' && defined $default_text_plain_charset) {
3923                 $type .= "; charset=$default_text_plain_charset";
3924         }
3925
3926         return $type;
3927 }
3928
3929 # guess file syntax for syntax highlighting; return undef if no highlighting
3930 # the name of syntax can (in the future) depend on syntax highlighter used
3931 sub guess_file_syntax {
3932         my ($highlight, $file_name) = @_;
3933         return undef unless ($highlight && defined $file_name);
3934         my $basename = basename($file_name, '.in');
3935         return $highlight_basename{$basename}
3936                 if exists $highlight_basename{$basename};
3937
3938         $basename =~ /\.([^.]*)$/;
3939         my $ext = $1 or return undef;
3940         return $highlight_ext{$ext}
3941                 if exists $highlight_ext{$ext};
3942
3943         return undef;
3944 }
3945
3946 # run highlighter and return FD of its output,
3947 # or return original FD if no highlighting
3948 sub run_highlighter {
3949         my ($fd, $highlight, $syntax) = @_;
3950         return $fd unless ($highlight);
3951
3952         close $fd;
3953         my $syntax_arg = (defined $syntax) ? "--syntax $syntax" : "--force";
3954         open $fd, quote_command(git_cmd(), "cat-file", "blob", $hash)." | ".
3955                   quote_command($^X, '-CO', '-MEncode=decode,FB_DEFAULT', '-pse',
3956                     '$_ = decode($fe, $_, FB_DEFAULT) if !utf8::decode($_);',
3957                     '--', "-fe=$fallback_encoding")." | ".
3958                   quote_command($highlight_bin).
3959                   " --replace-tabs=8 --fragment $syntax_arg |"
3960                 or die_error(500, "Couldn't open file or run syntax highlighter");
3961         return $fd;
3962 }
3963
3964 ## ======================================================================
3965 ## functions printing HTML: header, footer, error page
3966
3967 sub get_page_title {
3968         my $title = to_utf8($site_name);
3969
3970         unless (defined $project) {
3971                 if (defined $project_filter) {
3972                         $title .= " - projects in '" . esc_path($project_filter) . "'";
3973                 }
3974                 return $title;
3975         }
3976         $title .= " - " . to_utf8($project);
3977
3978         return $title unless (defined $action);
3979         $title .= "/$action"; # $action is US-ASCII (7bit ASCII)
3980
3981         return $title unless (defined $file_name);
3982         $title .= " - " . esc_path($file_name);
3983         if ($action eq "tree" && $file_name !~ m|/$|) {
3984                 $title .= "/";
3985         }
3986
3987         return $title;
3988 }
3989
3990 sub get_content_type_html {
3991         # require explicit support from the UA if we are to send the page as
3992         # 'application/xhtml+xml', otherwise send it as plain old 'text/html'.
3993         # we have to do this because MSIE sometimes globs '*/*', pretending to
3994         # support xhtml+xml but choking when it gets what it asked for.
3995         if (defined $cgi->http('HTTP_ACCEPT') &&
3996             $cgi->http('HTTP_ACCEPT') =~ m/(,|;|\s|^)application\/xhtml\+xml(,|;|\s|$)/ &&
3997             $cgi->Accept('application/xhtml+xml') != 0) {
3998                 return 'application/xhtml+xml';
3999         } else {
4000                 return 'text/html';
4001         }
4002 }
4003
4004 sub print_feed_meta {
4005         if (defined $project) {
4006                 my %href_params = get_feed_info();
4007                 if (!exists $href_params{'-title'}) {
4008                         $href_params{'-title'} = 'log';
4009                 }
4010
4011                 foreach my $format (qw(RSS Atom)) {
4012                         my $type = lc($format);
4013                         my %link_attr = (
4014                                 '-rel' => 'alternate',
4015                                 '-title' => esc_attr("$project - $href_params{'-title'} - $format feed"),
4016                                 '-type' => "application/$type+xml"
4017                         );
4018
4019                         $href_params{'extra_options'} = undef;
4020                         $href_params{'action'} = $type;
4021                         $link_attr{'-href'} = href(%href_params);
4022                         print "<link ".
4023                               "rel=\"$link_attr{'-rel'}\" ".
4024                               "title=\"$link_attr{'-title'}\" ".
4025                               "href=\"$link_attr{'-href'}\" ".
4026                               "type=\"$link_attr{'-type'}\" ".
4027                               "/>\n";
4028
4029                         $href_params{'extra_options'} = '--no-merges';
4030                         $link_attr{'-href'} = href(%href_params);
4031                         $link_attr{'-title'} .= ' (no merges)';
4032                         print "<link ".
4033                               "rel=\"$link_attr{'-rel'}\" ".
4034                               "title=\"$link_attr{'-title'}\" ".
4035                               "href=\"$link_attr{'-href'}\" ".
4036                               "type=\"$link_attr{'-type'}\" ".
4037                               "/>\n";
4038                 }
4039
4040         } else {
4041                 printf('<link rel="alternate" title="%s projects list" '.
4042                        'href="%s" type="text/plain; charset=utf-8" />'."\n",
4043                        esc_attr($site_name), href(project=>undef, action=>"project_index"));
4044                 printf('<link rel="alternate" title="%s projects feeds" '.
4045                        'href="%s" type="text/x-opml" />'."\n",
4046                        esc_attr($site_name), href(project=>undef, action=>"opml"));
4047         }
4048 }
4049
4050 sub print_header_links {
4051         my $status = shift;
4052
4053         # print out each stylesheet that exist, providing backwards capability
4054         # for those people who defined $stylesheet in a config file
4055         if (defined $stylesheet) {
4056                 print '<link rel="stylesheet" type="text/css" href="'.esc_url($stylesheet).'"/>'."\n";
4057         } else {
4058                 foreach my $stylesheet (@stylesheets) {
4059                         next unless $stylesheet;
4060                         print '<link rel="stylesheet" type="text/css" href="'.esc_url($stylesheet).'"/>'."\n";
4061                 }
4062         }
4063         print_feed_meta()
4064                 if ($status eq '200 OK');
4065         if (defined $favicon) {
4066                 print qq(<link rel="shortcut icon" href=").esc_url($favicon).qq(" type="image/png" />\n);
4067         }
4068 }
4069
4070 sub print_nav_breadcrumbs_path {
4071         my $dirprefix = undef;
4072         while (my $part = shift) {
4073                 $dirprefix .= "/" if defined $dirprefix;
4074                 $dirprefix .= $part;
4075                 print $cgi->a({-href => href(project => undef,
4076                                              project_filter => $dirprefix,
4077                                              action => "project_list")},
4078                               esc_html($part)) . " / ";
4079         }
4080 }
4081
4082 sub print_nav_breadcrumbs {
4083         my %opts = @_;
4084
4085         for my $crumb (@extra_breadcrumbs, [ $home_link_str => $home_link ]) {
4086                 print $cgi->a({-href => esc_url($crumb->[1])}, $crumb->[0]) . " / ";
4087         }
4088         if (defined $project) {
4089                 my @dirname = split '/', $project;
4090                 my $projectbasename = pop @dirname;
4091                 print_nav_breadcrumbs_path(@dirname);
4092                 print $cgi->a({-href => href(action=>"summary")}, esc_html($projectbasename));
4093                 if (defined $action) {
4094                         my $action_print = $action ;
4095                         if (defined $opts{-action_extra}) {
4096                                 $action_print = $cgi->a({-href => href(action=>$action)},
4097                                         $action);
4098                         }
4099                         print " / $action_print";
4100                 }
4101                 if (defined $opts{-action_extra}) {
4102                         print " / $opts{-action_extra}";
4103                 }
4104                 print "\n";
4105         } elsif (defined $project_filter) {
4106                 print_nav_breadcrumbs_path(split '/', $project_filter);
4107         }
4108 }
4109
4110 sub print_search_form {
4111         if (!defined $searchtext) {
4112                 $searchtext = "";
4113         }
4114         my $search_hash;
4115         if (defined $hash_base) {
4116                 $search_hash = $hash_base;
4117         } elsif (defined $hash) {
4118                 $search_hash = $hash;
4119         } else {
4120                 $search_hash = "HEAD";
4121         }
4122         my $action = $my_uri;
4123         my $use_pathinfo = gitweb_check_feature('pathinfo');
4124         if ($use_pathinfo) {
4125                 $action .= "/".esc_url($project);
4126         }
4127         print $cgi->start_form(-method => "get", -action => $action) .
4128               "<div class=\"search\">\n" .
4129               (!$use_pathinfo &&
4130               $cgi->input({-name=>"p", -value=>$project, -type=>"hidden"}) . "\n") .
4131               $cgi->input({-name=>"a", -value=>"search", -type=>"hidden"}) . "\n" .
4132               $cgi->input({-name=>"h", -value=>$search_hash, -type=>"hidden"}) . "\n" .
4133               $cgi->popup_menu(-name => 'st', -default => 'commit',
4134                                -values => ['commit', 'grep', 'author', 'committer', 'pickaxe']) .
4135               " " . $cgi->a({-href => href(action=>"search_help"),
4136                              -title => "search help" }, "?") . " search:\n",
4137               $cgi->textfield(-name => "s", -value => $searchtext, -override => 1) . "\n" .
4138               "<span title=\"Extended regular expression\">" .
4139               $cgi->checkbox(-name => 'sr', -value => 1, -label => 're',
4140                              -checked => $search_use_regexp) .
4141               "</span>" .
4142               "</div>" .
4143               $cgi->end_form() . "\n";
4144 }
4145
4146 sub git_header_html {
4147         my $status = shift || "200 OK";
4148         my $expires = shift;
4149         my %opts = @_;
4150
4151         my $title = get_page_title();
4152         my $content_type = get_content_type_html();
4153         print $cgi->header(-type=>$content_type, -charset => 'utf-8',
4154                            -status=> $status, -expires => $expires)
4155                 unless ($opts{'-no_http_header'});
4156         my $mod_perl_version = $ENV{'MOD_PERL'} ? " $ENV{'MOD_PERL'}" : '';
4157         print <<EOF;
4158 <?xml version="1.0" encoding="utf-8"?>
4159 <!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Strict//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-strict.dtd">
4160 <html xmlns="http://www.w3.org/1999/xhtml" xml:lang="en-US" lang="en-US">
4161 <!-- git web interface version $version, (C) 2005-2006, Kay Sievers <kay.sievers\@vrfy.org>, Christian Gierke -->
4162 <!-- git core binaries version $git_version -->
4163 <head>
4164 <meta http-equiv="content-type" content="$content_type; charset=utf-8"/>
4165 <meta name="generator" content="gitweb/$version git/$git_version$mod_perl_version"/>
4166 <meta name="robots" content="index, nofollow"/>
4167 <title>$title</title>
4168 EOF
4169         # the stylesheet, favicon etc urls won't work correctly with path_info
4170         # unless we set the appropriate base URL
4171         if ($ENV{'PATH_INFO'}) {
4172                 print "<base href=\"".esc_url($base_url)."\" />\n";
4173         }
4174         print_header_links($status);
4175
4176         if (defined $site_html_head_string) {
4177                 print to_utf8($site_html_head_string);
4178         }
4179
4180         print "</head>\n" .
4181               "<body>\n";
4182
4183         if (defined $site_header && -f $site_header) {
4184                 insert_file($site_header);
4185         }
4186
4187         print "<div class=\"page_header\">\n";
4188         if (defined $logo) {
4189                 print $cgi->a({-href => esc_url($logo_url),
4190                                -title => $logo_label},
4191                               $cgi->img({-src => esc_url($logo),
4192                                          -width => 72, -height => 27,
4193                                          -alt => "git",
4194                                          -class => "logo"}));
4195         }
4196         print_nav_breadcrumbs(%opts);
4197         print "</div>\n";
4198
4199         my $have_search = gitweb_check_feature('search');
4200         if (defined $project && $have_search) {
4201                 print_search_form();
4202         }
4203 }
4204
4205 sub git_footer_html {
4206         my $feed_class = 'rss_logo';
4207
4208         print "<div class=\"page_footer\">\n";
4209         if (defined $project) {
4210                 my $descr = git_get_project_description($project);
4211                 if (defined $descr) {
4212                         print "<div class=\"page_footer_text\">" . esc_html($descr) . "</div>\n";
4213                 }
4214
4215                 my %href_params = get_feed_info();
4216                 if (!%href_params) {
4217                         $feed_class .= ' generic';
4218                 }
4219                 $href_params{'-title'} ||= 'log';
4220
4221                 foreach my $format (qw(RSS Atom)) {
4222                         $href_params{'action'} = lc($format);
4223                         print $cgi->a({-href => href(%href_params),
4224                                       -title => "$href_params{'-title'} $format feed",
4225                                       -class => $feed_class}, $format)."\n";
4226                 }
4227
4228         } else {
4229                 print $cgi->a({-href => href(project=>undef, action=>"opml",
4230                                              project_filter => $project_filter),
4231                               -class => $feed_class}, "OPML") . " ";
4232                 print $cgi->a({-href => href(project=>undef, action=>"project_index",
4233                                              project_filter => $project_filter),
4234                               -class => $feed_class}, "TXT") . "\n";
4235         }
4236         print "</div>\n"; # class="page_footer"
4237
4238         if (defined $t0 && gitweb_check_feature('timed')) {
4239                 print "<div id=\"generating_info\">\n";
4240                 print 'This page took '.
4241                       '<span id="generating_time" class="time_span">'.
4242                       tv_interval($t0, [ gettimeofday() ]).
4243                       ' seconds </span>'.
4244                       ' and '.
4245                       '<span id="generating_cmd">'.
4246                       $number_of_git_cmds.
4247                       '</span> git commands '.
4248                       " to generate.\n";
4249                 print "</div>\n"; # class="page_footer"
4250         }
4251
4252         if (defined $site_footer && -f $site_footer) {
4253                 insert_file($site_footer);
4254         }
4255
4256         print qq!<script type="text/javascript" src="!.esc_url($javascript).qq!"></script>\n!;
4257         if (defined $action &&
4258             $action eq 'blame_incremental') {
4259                 print qq!<script type="text/javascript">\n!.
4260                       qq!startBlame("!. href(action=>"blame_data", -replay=>1) .qq!",\n!.
4261                       qq!           "!. href() .qq!");\n!.
4262                       qq!</script>\n!;
4263         } else {
4264                 my ($jstimezone, $tz_cookie, $datetime_class) =
4265                         gitweb_get_feature('javascript-timezone');
4266
4267                 print qq!<script type="text/javascript">\n!.
4268                       qq!window.onload = function () {\n!;
4269                 if (gitweb_check_feature('javascript-actions')) {
4270                         print qq!       fixLinks();\n!;
4271                 }
4272                 if ($jstimezone && $tz_cookie && $datetime_class) {
4273                         print qq!       var tz_cookie = { name: '$tz_cookie', expires: 14, path: '/' };\n!. # in days
4274                               qq!       onloadTZSetup('$jstimezone', tz_cookie, '$datetime_class');\n!;
4275                 }
4276                 print qq!};\n!.
4277                       qq!</script>\n!;
4278         }
4279
4280         print "</body>\n" .
4281               "</html>";
4282 }
4283
4284 # die_error(<http_status_code>, <error_message>[, <detailed_html_description>])
4285 # Example: die_error(404, 'Hash not found')
4286 # By convention, use the following status codes (as defined in RFC 2616):
4287 # 400: Invalid or missing CGI parameters, or
4288 #      requested object exists but has wrong type.
4289 # 403: Requested feature (like "pickaxe" or "snapshot") not enabled on
4290 #      this server or project.
4291 # 404: Requested object/revision/project doesn't exist.
4292 # 500: The server isn't configured properly, or
4293 #      an internal error occurred (e.g. failed assertions caused by bugs), or
4294 #      an unknown error occurred (e.g. the git binary died unexpectedly).
4295 # 503: The server is currently unavailable (because it is overloaded,
4296 #      or down for maintenance).  Generally, this is a temporary state.
4297 sub die_error {
4298         my $status = shift || 500;
4299         my $error = esc_html(shift) || "Internal Server Error";
4300         my $extra = shift;
4301         my %opts = @_;
4302
4303         my %http_responses = (
4304                 400 => '400 Bad Request',
4305                 403 => '403 Forbidden',
4306                 404 => '404 Not Found',
4307                 500 => '500 Internal Server Error',
4308                 503 => '503 Service Unavailable',
4309         );
4310         git_header_html($http_responses{$status}, undef, %opts);
4311         print <<EOF;
4312 <div class="page_body">
4313 <br /><br />
4314 $status - $error
4315 <br />
4316 EOF
4317         if (defined $extra) {
4318                 print "<hr />\n" .
4319                       "$extra\n";
4320         }
4321         print "</div>\n";
4322
4323         git_footer_html();
4324         goto DONE_GITWEB
4325                 unless ($opts{'-error_handler'});
4326 }
4327
4328 ## ----------------------------------------------------------------------
4329 ## functions printing or outputting HTML: navigation
4330
4331 sub git_print_page_nav {
4332         my ($current, $suppress, $head, $treehead, $treebase, $extra) = @_;
4333         $extra = '' if !defined $extra; # pager or formats
4334
4335         my @navs = qw(summary shortlog log commit commitdiff tree);
4336         if ($suppress) {
4337                 @navs = grep { $_ ne $suppress } @navs;
4338         }
4339
4340         my %arg = map { $_ => {action=>$_} } @navs;
4341         if (defined $head) {
4342                 for (qw(commit commitdiff)) {
4343                         $arg{$_}{'hash'} = $head;
4344                 }
4345                 if ($current =~ m/^(tree | log | shortlog | commit | commitdiff | search)$/x) {
4346                         for (qw(shortlog log)) {
4347                                 $arg{$_}{'hash'} = $head;
4348                         }
4349                 }
4350         }
4351
4352         $arg{'tree'}{'hash'} = $treehead if defined $treehead;
4353         $arg{'tree'}{'hash_base'} = $treebase if defined $treebase;
4354
4355         my @actions = gitweb_get_feature('actions');
4356         my %repl = (
4357                 '%' => '%',
4358                 'n' => $project,         # project name
4359                 'f' => $git_dir,         # project path within filesystem
4360                 'h' => $treehead || '',  # current hash ('h' parameter)
4361                 'b' => $treebase || '',  # hash base ('hb' parameter)
4362         );
4363         while (@actions) {
4364                 my ($label, $link, $pos) = splice(@actions,0,3);
4365                 # insert
4366                 @navs = map { $_ eq $pos ? ($_, $label) : $_ } @navs;
4367                 # munch munch
4368                 $link =~ s/%([%nfhb])/$repl{$1}/g;
4369                 $arg{$label}{'_href'} = $link;
4370         }
4371
4372         print "<div class=\"page_nav\">\n" .
4373                 (join " | ",
4374                  map { $_ eq $current ?
4375                        $_ : $cgi->a({-href => ($arg{$_}{_href} ? $arg{$_}{_href} : href(%{$arg{$_}}))}, "$_")
4376                  } @navs);
4377         print "<br/>\n$extra<br/>\n" .
4378               "</div>\n";
4379 }
4380
4381 # returns a submenu for the navigation of the refs views (tags, heads,
4382 # remotes) with the current view disabled and the remotes view only
4383 # available if the feature is enabled
4384 sub format_ref_views {
4385         my ($current) = @_;
4386         my @ref_views = qw{tags heads};
4387         push @ref_views, 'remotes' if gitweb_check_feature('remote_heads');
4388         return join " | ", map {
4389                 $_ eq $current ? $_ :
4390                 $cgi->a({-href => href(action=>$_)}, $_)
4391         } @ref_views
4392 }
4393
4394 sub format_paging_nav {
4395         my ($action, $page, $has_next_link) = @_;
4396         my $paging_nav;
4397
4398
4399         if ($page > 0) {
4400                 $paging_nav .=
4401                         $cgi->a({-href => href(-replay=>1, page=>undef)}, "first") .
4402                         " &sdot; " .
4403                         $cgi->a({-href => href(-replay=>1, page=>$page-1),
4404                                  -accesskey => "p", -title => "Alt-p"}, "prev");
4405         } else {
4406                 $paging_nav .= "first &sdot; prev";
4407         }
4408
4409         if ($has_next_link) {
4410                 $paging_nav .= " &sdot; " .
4411                         $cgi->a({-href => href(-replay=>1, page=>$page+1),
4412                                  -accesskey => "n", -title => "Alt-n"}, "next");
4413         } else {
4414                 $paging_nav .= " &sdot; next";
4415         }
4416
4417         return $paging_nav;
4418 }
4419
4420 ## ......................................................................
4421 ## functions printing or outputting HTML: div
4422
4423 sub git_print_header_div {
4424         my ($action, $title, $hash, $hash_base) = @_;
4425         my %args = ();
4426
4427         $args{'action'} = $action;
4428         $args{'hash'} = $hash if $hash;
4429         $args{'hash_base'} = $hash_base if $hash_base;
4430
4431         print "<div class=\"header\">\n" .
4432               $cgi->a({-href => href(%args), -class => "title"},
4433               $title ? $title : $action) .
4434               "\n</div>\n";
4435 }
4436
4437 sub format_repo_url {
4438         my ($name, $url) = @_;
4439         return "<tr class=\"metadata_url\"><td>$name</td><td>$url</td></tr>\n";
4440 }
4441
4442 # Group output by placing it in a DIV element and adding a header.
4443 # Options for start_div() can be provided by passing a hash reference as the
4444 # first parameter to the function.
4445 # Options to git_print_header_div() can be provided by passing an array
4446 # reference. This must follow the options to start_div if they are present.
4447 # The content can be a scalar, which is output as-is, a scalar reference, which
4448 # is output after html escaping, an IO handle passed either as *handle or
4449 # *handle{IO}, or a function reference. In the latter case all following
4450 # parameters will be taken as argument to the content function call.
4451 sub git_print_section {
4452         my ($div_args, $header_args, $content);
4453         my $arg = shift;
4454         if (ref($arg) eq 'HASH') {
4455                 $div_args = $arg;
4456                 $arg = shift;
4457         }
4458         if (ref($arg) eq 'ARRAY') {
4459                 $header_args = $arg;
4460                 $arg = shift;
4461         }
4462         $content = $arg;
4463
4464         print $cgi->start_div($div_args);
4465         git_print_header_div(@$header_args);
4466
4467         if (ref($content) eq 'CODE') {
4468                 $content->(@_);
4469         } elsif (ref($content) eq 'SCALAR') {
4470                 print esc_html($$content);
4471         } elsif (ref($content) eq 'GLOB' or ref($content) eq 'IO::Handle') {
4472                 print <$content>;
4473         } elsif (!ref($content) && defined($content)) {
4474                 print $content;
4475         }
4476
4477         print $cgi->end_div;
4478 }
4479
4480 sub format_timestamp_html {
4481         my $date = shift;
4482         my $strtime = $date->{'rfc2822'};
4483
4484         my (undef, undef, $datetime_class) =
4485                 gitweb_get_feature('javascript-timezone');
4486         if ($datetime_class) {
4487                 $strtime = qq!<span class="$datetime_class">$strtime</span>!;
4488         }
4489
4490         my $localtime_format = '(%02d:%02d %s)';
4491         if ($date->{'hour_local'} < 6) {
4492                 $localtime_format = '(<span class="atnight">%02d:%02d</span> %s)';
4493         }
4494         $strtime .= ' ' .
4495                     sprintf($localtime_format,
4496                             $date->{'hour_local'}, $date->{'minute_local'}, $date->{'tz_local'});
4497
4498         return $strtime;
4499 }
4500
4501 # Outputs the author name and date in long form
4502 sub git_print_authorship {
4503         my $co = shift;
4504         my %opts = @_;
4505         my $tag = $opts{-tag} || 'div';
4506         my $author = $co->{'author_name'};
4507
4508         my %ad = parse_date($co->{'author_epoch'}, $co->{'author_tz'});
4509         print "<$tag class=\"author_date\">" .
4510               format_search_author($author, "author", esc_html($author)) .
4511               " [".format_timestamp_html(\%ad)."]".
4512               git_get_avatar($co->{'author_email'}, -pad_before => 1) .
4513               "</$tag>\n";
4514 }
4515
4516 # Outputs table rows containing the full author or committer information,
4517 # in the format expected for 'commit' view (& similar).
4518 # Parameters are a commit hash reference, followed by the list of people
4519 # to output information for. If the list is empty it defaults to both
4520 # author and committer.
4521 sub git_print_authorship_rows {
4522         my $co = shift;
4523         # too bad we can't use @people = @_ || ('author', 'committer')
4524         my @people = @_;
4525         @people = ('author', 'committer') unless @people;
4526         foreach my $who (@people) {
4527                 my %wd = parse_date($co->{"${who}_epoch"}, $co->{"${who}_tz"});
4528                 print "<tr><td>$who</td><td>" .
4529                       format_search_author($co->{"${who}_name"}, $who,
4530                                            esc_html($co->{"${who}_name"})) . " " .
4531                       format_search_author($co->{"${who}_email"}, $who,
4532                                            esc_html("<" . $co->{"${who}_email"} . ">")) .
4533                       "</td><td rowspan=\"2\">" .
4534                       git_get_avatar($co->{"${who}_email"}, -size => 'double') .
4535                       "</td></tr>\n" .
4536                       "<tr>" .
4537                       "<td></td><td>" .
4538                       format_timestamp_html(\%wd) .
4539                       "</td>" .
4540                       "</tr>\n";
4541         }
4542 }
4543
4544 sub git_print_page_path {
4545         my $name = shift;
4546         my $type = shift;
4547         my $hb = shift;
4548
4549
4550         print "<div class=\"page_path\">";
4551         print $cgi->a({-href => href(action=>"tree", hash_base=>$hb),
4552                       -title => 'tree root'}, to_utf8("[$project]"));
4553         print " / ";
4554         if (defined $name) {
4555                 my @dirname = split '/', $name;
4556                 my $basename = pop @dirname;
4557                 my $fullname = '';
4558
4559                 foreach my $dir (@dirname) {
4560                         $fullname .= ($fullname ? '/' : '') . $dir;
4561                         print $cgi->a({-href => href(action=>"tree", file_name=>$fullname,
4562                                                      hash_base=>$hb),
4563                                       -title => $fullname}, esc_path($dir));
4564                         print " / ";
4565                 }
4566                 if (defined $type && $type eq 'blob') {
4567                         print $cgi->a({-href => href(action=>"blob_plain", file_name=>$file_name,
4568                                                      hash_base=>$hb),
4569                                       -title => $name}, esc_path($basename));
4570                 } elsif (defined $type && $type eq 'tree') {
4571                         print $cgi->a({-href => href(action=>"tree", file_name=>$file_name,
4572                                                      hash_base=>$hb),
4573                                       -title => $name}, esc_path($basename));
4574                         print " / ";
4575                 } else {
4576                         print esc_path($basename);
4577                 }
4578         }
4579         print "<br/></div>\n";
4580 }
4581
4582 sub git_print_log {
4583         my $log = shift;
4584         my %opts = @_;
4585
4586         if ($opts{'-remove_title'}) {
4587                 # remove title, i.e. first line of log
4588                 shift @$log;
4589         }
4590         # remove leading empty lines
4591         while (defined $log->[0] && $log->[0] eq "") {
4592                 shift @$log;
4593         }
4594
4595         # print log
4596         my $skip_blank_line = 0;
4597         foreach my $line (@$log) {
4598                 if ($line =~ m/^\s*([A-Z][-A-Za-z]*-[Bb]y|C[Cc]): /) {
4599                         if (! $opts{'-remove_signoff'}) {
4600                                 print "<span class=\"signoff\">" . esc_html($line) . "</span><br/>\n";
4601                                 $skip_blank_line = 1;
4602                         }
4603                         next;
4604                 }
4605
4606                 if ($line =~ m,\s*([a-z]*link): (https?://\S+),i) {
4607                         if (! $opts{'-remove_signoff'}) {
4608                                 print "<span class=\"signoff\">" . esc_html($1) . ": " .
4609                                         "<a href=\"" . esc_html($2) . "\">" . esc_html($2) . "</a>" .
4610                                         "</span><br/>\n";
4611                                 $skip_blank_line = 1;
4612                         }
4613                         next;
4614                 }
4615
4616                 # print only one empty line
4617                 # do not print empty line after signoff
4618                 if ($line eq "") {
4619                         next if ($skip_blank_line);
4620                         $skip_blank_line = 1;
4621                 } else {
4622                         $skip_blank_line = 0;
4623                 }
4624
4625                 print format_log_line_html($line) . "<br/>\n";
4626         }
4627
4628         if ($opts{'-final_empty_line'}) {
4629                 # end with single empty line
4630                 print "<br/>\n" unless $skip_blank_line;
4631         }
4632 }
4633
4634 # return link target (what link points to)
4635 sub git_get_link_target {
4636         my $hash = shift;
4637         my $link_target;
4638
4639         # read link
4640         open my $fd, "-|", git_cmd(), "cat-file", "blob", $hash
4641                 or return;
4642         {
4643                 local $/ = undef;
4644                 $link_target = <$fd>;
4645         }
4646         close $fd
4647                 or return;
4648
4649         return $link_target;
4650 }
4651
4652 # given link target, and the directory (basedir) the link is in,
4653 # return target of link relative to top directory (top tree);
4654 # return undef if it is not possible (including absolute links).
4655 sub normalize_link_target {
4656         my ($link_target, $basedir) = @_;
4657
4658         # absolute symlinks (beginning with '/') cannot be normalized
4659         return if (substr($link_target, 0, 1) eq '/');
4660
4661         # normalize link target to path from top (root) tree (dir)
4662         my $path;
4663         if ($basedir) {
4664                 $path = $basedir . '/' . $link_target;
4665         } else {
4666                 # we are in top (root) tree (dir)
4667                 $path = $link_target;
4668         }
4669
4670         # remove //, /./, and /../
4671         my @path_parts;
4672         foreach my $part (split('/', $path)) {
4673                 # discard '.' and ''
4674                 next if (!$part || $part eq '.');
4675                 # handle '..'
4676                 if ($part eq '..') {
4677                         if (@path_parts) {
4678                                 pop @path_parts;
4679                         } else {
4680                                 # link leads outside repository (outside top dir)
4681                                 return;
4682                         }
4683                 } else {
4684                         push @path_parts, $part;
4685                 }
4686         }
4687         $path = join('/', @path_parts);
4688
4689         return $path;
4690 }
4691
4692 # print tree entry (row of git_tree), but without encompassing <tr> element
4693 sub git_print_tree_entry {
4694         my ($t, $basedir, $hash_base, $have_blame) = @_;
4695
4696         my %base_key = ();
4697         $base_key{'hash_base'} = $hash_base if defined $hash_base;
4698
4699         # The format of a table row is: mode list link.  Where mode is
4700         # the mode of the entry, list is the name of the entry, an href,
4701         # and link is the action links of the entry.
4702
4703         print "<td class=\"mode\">" . mode_str($t->{'mode'}) . "</td>\n";
4704         if (exists $t->{'size'}) {
4705                 print "<td class=\"size\">$t->{'size'}</td>\n";
4706         }
4707         if ($t->{'type'} eq "blob") {
4708                 print "<td class=\"list\">" .
4709                         $cgi->a({-href => href(action=>"blob", hash=>$t->{'hash'},
4710                                                file_name=>"$basedir$t->{'name'}", %base_key),
4711                                 -class => "list"}, esc_path($t->{'name'}));
4712                 if (S_ISLNK(oct $t->{'mode'})) {
4713                         my $link_target = git_get_link_target($t->{'hash'});
4714                         if ($link_target) {
4715                                 my $norm_target = normalize_link_target($link_target, $basedir);
4716                                 if (defined $norm_target) {
4717                                         print " -> " .
4718                                               $cgi->a({-href => href(action=>"object", hash_base=>$hash_base,
4719                                                                      file_name=>$norm_target),
4720                                                        -title => $norm_target}, esc_path($link_target));
4721                                 } else {
4722                                         print " -> " . esc_path($link_target);
4723                                 }
4724                         }
4725                 }
4726                 print "</td>\n";
4727                 print "<td class=\"link\">";
4728                 print $cgi->a({-href => href(action=>"blob", hash=>$t->{'hash'},
4729                                              file_name=>"$basedir$t->{'name'}", %base_key)},
4730                               "blob");
4731                 if ($have_blame) {
4732                         print " | " .
4733                               $cgi->a({-href => href(action=>"blame", hash=>$t->{'hash'},
4734                                                      file_name=>"$basedir$t->{'name'}", %base_key)},
4735                                       "blame");
4736                 }
4737                 if (defined $hash_base) {
4738                         print " | " .
4739                               $cgi->a({-href => href(action=>"history", hash_base=>$hash_base,
4740                                                      hash=>$t->{'hash'}, file_name=>"$basedir$t->{'name'}")},
4741                                       "history");
4742                 }
4743                 print " | " .
4744                         $cgi->a({-href => href(action=>"blob_plain", hash_base=>$hash_base,
4745                                                file_name=>"$basedir$t->{'name'}")},
4746                                 "raw");
4747                 print "</td>\n";
4748
4749         } elsif ($t->{'type'} eq "tree") {
4750                 print "<td class=\"list\">";
4751                 print $cgi->a({-href => href(action=>"tree", hash=>$t->{'hash'},
4752                                              file_name=>"$basedir$t->{'name'}",
4753                                              %base_key)},
4754                               esc_path($t->{'name'}));
4755                 print "</td>\n";
4756                 print "<td class=\"link\">";
4757                 print $cgi->a({-href => href(action=>"tree", hash=>$t->{'hash'},
4758                                              file_name=>"$basedir$t->{'name'}",
4759                                              %base_key)},
4760                               "tree");
4761                 if (defined $hash_base) {
4762                         print " | " .
4763                               $cgi->a({-href => href(action=>"history", hash_base=>$hash_base,
4764                                                      file_name=>"$basedir$t->{'name'}")},
4765                                       "history");
4766                 }
4767                 print "</td>\n";
4768         } else {
4769                 # unknown object: we can only present history for it
4770                 # (this includes 'commit' object, i.e. submodule support)
4771                 print "<td class=\"list\">" .
4772                       esc_path($t->{'name'}) .
4773                       "</td>\n";
4774                 print "<td class=\"link\">";
4775                 if (defined $hash_base) {
4776                         print $cgi->a({-href => href(action=>"history",
4777                                                      hash_base=>$hash_base,
4778                                                      file_name=>"$basedir$t->{'name'}")},
4779                                       "history");
4780                 }
4781                 print "</td>\n";
4782         }
4783 }
4784
4785 ## ......................................................................
4786 ## functions printing large fragments of HTML
4787
4788 # get pre-image filenames for merge (combined) diff
4789 sub fill_from_file_info {
4790         my ($diff, @parents) = @_;
4791
4792         $diff->{'from_file'} = [ ];
4793         $diff->{'from_file'}[$diff->{'nparents'} - 1] = undef;
4794         for (my $i = 0; $i < $diff->{'nparents'}; $i++) {
4795                 if ($diff->{'status'}[$i] eq 'R' ||
4796                     $diff->{'status'}[$i] eq 'C') {
4797                         $diff->{'from_file'}[$i] =
4798                                 git_get_path_by_hash($parents[$i], $diff->{'from_id'}[$i]);
4799                 }
4800         }
4801
4802         return $diff;
4803 }
4804
4805 # is current raw difftree line of file deletion
4806 sub is_deleted {
4807         my $diffinfo = shift;
4808
4809         return $diffinfo->{'to_id'} eq ('0' x 40);
4810 }
4811
4812 # does patch correspond to [previous] difftree raw line
4813 # $diffinfo  - hashref of parsed raw diff format
4814 # $patchinfo - hashref of parsed patch diff format
4815 #              (the same keys as in $diffinfo)
4816 sub is_patch_split {
4817         my ($diffinfo, $patchinfo) = @_;
4818
4819         return defined $diffinfo && defined $patchinfo
4820                 && $diffinfo->{'to_file'} eq $patchinfo->{'to_file'};
4821 }
4822
4823
4824 sub git_difftree_body {
4825         my ($difftree, $hash, @parents) = @_;
4826         my ($parent) = $parents[0];
4827         my $have_blame = gitweb_check_feature('blame');
4828         print "<div class=\"list_head\">\n";
4829         if ($#{$difftree} > 10) {
4830                 print(($#{$difftree} + 1) . " files changed:\n");
4831         }
4832         print "</div>\n";
4833
4834         print "<table class=\"" .
4835               (@parents > 1 ? "combined " : "") .
4836               "diff_tree\">\n";
4837
4838         # header only for combined diff in 'commitdiff' view
4839         my $has_header = @$difftree && @parents > 1 && $action eq 'commitdiff';
4840         if ($has_header) {
4841                 # table header
4842                 print "<thead><tr>\n" .
4843                        "<th></th><th></th>\n"; # filename, patchN link
4844                 for (my $i = 0; $i < @parents; $i++) {
4845                         my $par = $parents[$i];
4846                         print "<th>" .
4847                               $cgi->a({-href => href(action=>"commitdiff",
4848                                                      hash=>$hash, hash_parent=>$par),
4849                                        -title => 'commitdiff to parent number ' .
4850                                                   ($i+1) . ': ' . substr($par,0,7)},
4851                                       $i+1) .
4852                               "&nbsp;</th>\n";
4853                 }
4854                 print "</tr></thead>\n<tbody>\n";
4855         }
4856
4857         my $alternate = 1;
4858         my $patchno = 0;
4859         foreach my $line (@{$difftree}) {
4860                 my $diff = parsed_difftree_line($line);
4861
4862                 if ($alternate) {
4863                         print "<tr class=\"dark\">\n";
4864                 } else {
4865                         print "<tr class=\"light\">\n";
4866                 }
4867                 $alternate ^= 1;
4868
4869                 if (exists $diff->{'nparents'}) { # combined diff
4870
4871                         fill_from_file_info($diff, @parents)
4872                                 unless exists $diff->{'from_file'};
4873
4874                         if (!is_deleted($diff)) {
4875                                 # file exists in the result (child) commit
4876                                 print "<td>" .
4877                                       $cgi->a({-href => href(action=>"blob", hash=>$diff->{'to_id'},
4878                                                              file_name=>$diff->{'to_file'},
4879                                                              hash_base=>$hash),
4880                                               -class => "list"}, esc_path($diff->{'to_file'})) .
4881                                       "</td>\n";
4882                         } else {
4883                                 print "<td>" .
4884                                       esc_path($diff->{'to_file'}) .
4885                                       "</td>\n";
4886                         }
4887
4888                         if ($action eq 'commitdiff') {
4889                                 # link to patch
4890                                 $patchno++;
4891                                 print "<td class=\"link\">" .
4892                                       $cgi->a({-href => href(-anchor=>"patch$patchno")},
4893                                               "patch") .
4894                                       " | " .
4895                                       "</td>\n";
4896                         }
4897
4898                         my $has_history = 0;
4899                         my $not_deleted = 0;
4900                         for (my $i = 0; $i < $diff->{'nparents'}; $i++) {
4901                                 my $hash_parent = $parents[$i];
4902                                 my $from_hash = $diff->{'from_id'}[$i];
4903                                 my $from_path = $diff->{'from_file'}[$i];
4904                                 my $status = $diff->{'status'}[$i];
4905
4906                                 $has_history ||= ($status ne 'A');
4907                                 $not_deleted ||= ($status ne 'D');
4908
4909                                 if ($status eq 'A') {
4910                                         print "<td  class=\"link\" align=\"right\"> | </td>\n";
4911                                 } elsif ($status eq 'D') {
4912                                         print "<td class=\"link\">" .
4913                                               $cgi->a({-href => href(action=>"blob",
4914                                                                      hash_base=>$hash,
4915                                                                      hash=>$from_hash,
4916                                                                      file_name=>$from_path)},
4917                                                       "blob" . ($i+1)) .
4918                                               " | </td>\n";
4919                                 } else {
4920                                         if ($diff->{'to_id'} eq $from_hash) {
4921                                                 print "<td class=\"link nochange\">";
4922                                         } else {
4923                                                 print "<td class=\"link\">";
4924                                         }
4925                                         print $cgi->a({-href => href(action=>"blobdiff",
4926                                                                      hash=>$diff->{'to_id'},
4927                                                                      hash_parent=>$from_hash,
4928                                                                      hash_base=>$hash,
4929                                                                      hash_parent_base=>$hash_parent,
4930                                                                      file_name=>$diff->{'to_file'},
4931                                                                      file_parent=>$from_path)},
4932                                                       "diff" . ($i+1)) .
4933                                               " | </td>\n";
4934                                 }
4935                         }
4936
4937                         print "<td class=\"link\">";
4938                         if ($not_deleted) {
4939                                 print $cgi->a({-href => href(action=>"blob",
4940                                                              hash=>$diff->{'to_id'},
4941                                                              file_name=>$diff->{'to_file'},
4942                                                              hash_base=>$hash)},
4943                                               "blob");
4944                                 print " | " if ($has_history);
4945                         }
4946                         if ($has_history) {
4947                                 print $cgi->a({-href => href(action=>"history",
4948                                                              file_name=>$diff->{'to_file'},
4949                                                              hash_base=>$hash)},
4950                                               "history");
4951                         }
4952                         print "</td>\n";
4953
4954                         print "</tr>\n";
4955                         next; # instead of 'else' clause, to avoid extra indent
4956                 }
4957                 # else ordinary diff
4958
4959                 my ($to_mode_oct, $to_mode_str, $to_file_type);
4960                 my ($from_mode_oct, $from_mode_str, $from_file_type);
4961                 if ($diff->{'to_mode'} ne ('0' x 6)) {
4962                         $to_mode_oct = oct $diff->{'to_mode'};
4963                         if (S_ISREG($to_mode_oct)) { # only for regular file
4964                                 $to_mode_str = sprintf("%04o", $to_mode_oct & 0777); # permission bits
4965                         }
4966                         $to_file_type = file_type($diff->{'to_mode'});
4967                 }
4968                 if ($diff->{'from_mode'} ne ('0' x 6)) {
4969                         $from_mode_oct = oct $diff->{'from_mode'};
4970                         if (S_ISREG($from_mode_oct)) { # only for regular file
4971                                 $from_mode_str = sprintf("%04o", $from_mode_oct & 0777); # permission bits
4972                         }
4973                         $from_file_type = file_type($diff->{'from_mode'});
4974                 }
4975
4976                 if ($diff->{'status'} eq "A") { # created
4977                         my $mode_chng = "<span class=\"file_status new\">[new $to_file_type";
4978                         $mode_chng   .= " with mode: $to_mode_str" if $to_mode_str;
4979                         $mode_chng   .= "]</span>";
4980                         print "<td>";
4981                         print $cgi->a({-href => href(action=>"blob", hash=>$diff->{'to_id'},
4982                                                      hash_base=>$hash, file_name=>$diff->{'file'}),
4983                                       -class => "list"}, esc_path($diff->{'file'}));
4984                         print "</td>\n";
4985                         print "<td>$mode_chng</td>\n";
4986                         print "<td class=\"link\">";
4987                         if ($action eq 'commitdiff') {
4988                                 # link to patch
4989                                 $patchno++;
4990                                 print $cgi->a({-href => href(-anchor=>"patch$patchno")},
4991                                               "patch") .
4992                                       " | ";
4993                         }
4994                         print $cgi->a({-href => href(action=>"blob", hash=>$diff->{'to_id'},
4995                                                      hash_base=>$hash, file_name=>$diff->{'file'})},
4996                                       "blob");
4997                         print "</td>\n";
4998
4999                 } elsif ($diff->{'status'} eq "D") { # deleted
5000                         my $mode_chng = "<span class=\"file_status deleted\">[deleted $from_file_type]</span>";
5001                         print "<td>";
5002                         print $cgi->a({-href => href(action=>"blob", hash=>$diff->{'from_id'},
5003                                                      hash_base=>$parent, file_name=>$diff->{'file'}),
5004                                        -class => "list"}, esc_path($diff->{'file'}));
5005                         print "</td>\n";
5006                         print "<td>$mode_chng</td>\n";
5007                         print "<td class=\"link\">";
5008                         if ($action eq 'commitdiff') {
5009                                 # link to patch
5010                                 $patchno++;
5011                                 print $cgi->a({-href => href(-anchor=>"patch$patchno")},
5012                                               "patch") .
5013                                       " | ";
5014                         }
5015                         print $cgi->a({-href => href(action=>"blob", hash=>$diff->{'from_id'},
5016                                                      hash_base=>$parent, file_name=>$diff->{'file'})},
5017                                       "blob") . " | ";
5018                         if ($have_blame) {
5019                                 print $cgi->a({-href => href(action=>"blame", hash_base=>$parent,
5020                                                              file_name=>$diff->{'file'})},
5021                                               "blame") . " | ";
5022                         }
5023                         print $cgi->a({-href => href(action=>"history", hash_base=>$parent,
5024                                                      file_name=>$diff->{'file'})},
5025                                       "history");
5026                         print "</td>\n";
5027
5028                 } elsif ($diff->{'status'} eq "M" || $diff->{'status'} eq "T") { # modified, or type changed
5029                         my $mode_chnge = "";
5030                         if ($diff->{'from_mode'} != $diff->{'to_mode'}) {
5031                                 $mode_chnge = "<span class=\"file_status mode_chnge\">[changed";
5032                                 if ($from_file_type ne $to_file_type) {
5033                                         $mode_chnge .= " from $from_file_type to $to_file_type";
5034                                 }
5035                                 if (($from_mode_oct & 0777) != ($to_mode_oct & 0777)) {
5036                                         if ($from_mode_str && $to_mode_str) {
5037                                                 $mode_chnge .= " mode: $from_mode_str->$to_mode_str";
5038                                         } elsif ($to_mode_str) {
5039                                                 $mode_chnge .= " mode: $to_mode_str";
5040                                         }
5041                                 }
5042                                 $mode_chnge .= "]</span>\n";
5043                         }
5044                         print "<td>";
5045                         print $cgi->a({-href => href(action=>"blob", hash=>$diff->{'to_id'},
5046                                                      hash_base=>$hash, file_name=>$diff->{'file'}),
5047                                       -class => "list"}, esc_path($diff->{'file'}));
5048                         print "</td>\n";
5049                         print "<td>$mode_chnge</td>\n";
5050                         print "<td class=\"link\">";
5051                         if ($action eq 'commitdiff') {
5052                                 # link to patch
5053                                 $patchno++;
5054                                 print $cgi->a({-href => href(-anchor=>"patch$patchno")},
5055                                               "patch") .
5056                                       " | ";
5057                         } elsif ($diff->{'to_id'} ne $diff->{'from_id'}) {
5058                                 # "commit" view and modified file (not onlu mode changed)
5059                                 print $cgi->a({-href => href(action=>"blobdiff",
5060                                                              hash=>$diff->{'to_id'}, hash_parent=>$diff->{'from_id'},
5061                                                              hash_base=>$hash, hash_parent_base=>$parent,
5062                                                              file_name=>$diff->{'file'})},
5063                                               "diff") .
5064                                       " | ";
5065                         }
5066                         print $cgi->a({-href => href(action=>"blob", hash=>$diff->{'to_id'},
5067                                                      hash_base=>$hash, file_name=>$diff->{'file'})},
5068                                        "blob") . " | ";
5069                         if ($have_blame) {
5070                                 print $cgi->a({-href => href(action=>"blame", hash_base=>$hash,
5071                                                              file_name=>$diff->{'file'})},
5072                                               "blame") . " | ";
5073                         }
5074                         print $cgi->a({-href => href(action=>"history", hash_base=>$hash,
5075                                                      file_name=>$diff->{'file'})},
5076                                       "history");
5077                         print "</td>\n";
5078
5079                 } elsif ($diff->{'status'} eq "R" || $diff->{'status'} eq "C") { # renamed or copied
5080                         my %status_name = ('R' => 'moved', 'C' => 'copied');
5081                         my $nstatus = $status_name{$diff->{'status'}};
5082                         my $mode_chng = "";
5083                         if ($diff->{'from_mode'} != $diff->{'to_mode'}) {
5084                                 # mode also for directories, so we cannot use $to_mode_str
5085                                 $mode_chng = sprintf(", mode: %04o", $to_mode_oct & 0777);
5086                         }
5087                         print "<td>" .
5088                               $cgi->a({-href => href(action=>"blob", hash_base=>$hash,
5089                                                      hash=>$diff->{'to_id'}, file_name=>$diff->{'to_file'}),
5090                                       -class => "list"}, esc_path($diff->{'to_file'})) . "</td>\n" .
5091                               "<td><span class=\"file_status $nstatus\">[$nstatus from " .
5092                               $cgi->a({-href => href(action=>"blob", hash_base=>$parent,
5093                                                      hash=>$diff->{'from_id'}, file_name=>$diff->{'from_file'}),
5094                                       -class => "list"}, esc_path($diff->{'from_file'})) .
5095                               " with " . (int $diff->{'similarity'}) . "% similarity$mode_chng]</span></td>\n" .
5096                               "<td class=\"link\">";
5097                         if ($action eq 'commitdiff') {
5098                                 # link to patch
5099                                 $patchno++;
5100                                 print $cgi->a({-href => href(-anchor=>"patch$patchno")},
5101                                               "patch") .
5102                                       " | ";
5103                         } elsif ($diff->{'to_id'} ne $diff->{'from_id'}) {
5104                                 # "commit" view and modified file (not only pure rename or copy)
5105                                 print $cgi->a({-href => href(action=>"blobdiff",
5106                                                              hash=>$diff->{'to_id'}, hash_parent=>$diff->{'from_id'},
5107                                                              hash_base=>$hash, hash_parent_base=>$parent,
5108                                                              file_name=>$diff->{'to_file'}, file_parent=>$diff->{'from_file'})},
5109                                               "diff") .
5110                                       " | ";
5111                         }
5112                         print $cgi->a({-href => href(action=>"blob", hash=>$diff->{'to_id'},
5113                                                      hash_base=>$parent, file_name=>$diff->{'to_file'})},
5114                                       "blob") . " | ";
5115                         if ($have_blame) {
5116                                 print $cgi->a({-href => href(action=>"blame", hash_base=>$hash,
5117                                                              file_name=>$diff->{'to_file'})},
5118                                               "blame") . " | ";
5119                         }
5120                         print $cgi->a({-href => href(action=>"history", hash_base=>$hash,
5121                                                     file_name=>$diff->{'to_file'})},
5122                                       "history");
5123                         print "</td>\n";
5124
5125                 } # we should not encounter Unmerged (U) or Unknown (X) status
5126                 print "</tr>\n";
5127         }
5128         print "</tbody>" if $has_header;
5129         print "</table>\n";
5130 }
5131
5132 # Print context lines and then rem/add lines in a side-by-side manner.
5133 sub print_sidebyside_diff_lines {
5134         my ($ctx, $rem, $add) = @_;
5135
5136         # print context block before add/rem block
5137         if (@$ctx) {
5138                 print join '',
5139                         '<div class="chunk_block ctx">',
5140                                 '<div class="old">',
5141                                 @$ctx,
5142                                 '</div>',
5143                                 '<div class="new">',
5144                                 @$ctx,
5145                                 '</div>',
5146                         '</div>';
5147         }
5148
5149         if (!@$add) {
5150                 # pure removal
5151                 print join '',
5152                         '<div class="chunk_block rem">',
5153                                 '<div class="old">',
5154                                 @$rem,
5155                                 '</div>',
5156                         '</div>';
5157         } elsif (!@$rem) {
5158                 # pure addition
5159                 print join '',
5160                         '<div class="chunk_block add">',
5161                                 '<div class="new">',
5162                                 @$add,
5163                                 '</div>',
5164                         '</div>';
5165         } else {
5166                 print join '',
5167                         '<div class="chunk_block chg">',
5168                                 '<div class="old">',
5169                                 @$rem,
5170                                 '</div>',
5171                                 '<div class="new">',
5172                                 @$add,
5173                                 '</div>',
5174                         '</div>';
5175         }
5176 }
5177
5178 # Print context lines and then rem/add lines in inline manner.
5179 sub print_inline_diff_lines {
5180         my ($ctx, $rem, $add) = @_;
5181
5182         print @$ctx, @$rem, @$add;
5183 }
5184
5185 # Format removed and added line, mark changed part and HTML-format them.
5186 # Implementation is based on contrib/diff-highlight
5187 sub format_rem_add_lines_pair {
5188         my ($rem, $add, $num_parents) = @_;
5189
5190         # We need to untabify lines before split()'ing them;
5191         # otherwise offsets would be invalid.
5192         chomp $rem;
5193         chomp $add;
5194         $rem = untabify($rem);
5195         $add = untabify($add);
5196
5197         my @rem = split(//, $rem);
5198         my @add = split(//, $add);
5199         my ($esc_rem, $esc_add);
5200         # Ignore leading +/- characters for each parent.
5201         my ($prefix_len, $suffix_len) = ($num_parents, 0);
5202         my ($prefix_has_nonspace, $suffix_has_nonspace);
5203
5204         my $shorter = (@rem < @add) ? @rem : @add;
5205         while ($prefix_len < $shorter) {
5206                 last if ($rem[$prefix_len] ne $add[$prefix_len]);
5207
5208                 $prefix_has_nonspace = 1 if ($rem[$prefix_len] !~ /\s/);
5209                 $prefix_len++;
5210         }
5211
5212         while ($prefix_len + $suffix_len < $shorter) {
5213                 last if ($rem[-1 - $suffix_len] ne $add[-1 - $suffix_len]);
5214
5215                 $suffix_has_nonspace = 1 if ($rem[-1 - $suffix_len] !~ /\s/);
5216                 $suffix_len++;
5217         }
5218
5219         # Mark lines that are different from each other, but have some common
5220         # part that isn't whitespace.  If lines are completely different, don't
5221         # mark them because that would make output unreadable, especially if
5222         # diff consists of multiple lines.
5223         if ($prefix_has_nonspace || $suffix_has_nonspace) {
5224                 $esc_rem = esc_html_hl_regions($rem, 'marked',
5225                         [$prefix_len, @rem - $suffix_len], -nbsp=>1);
5226                 $esc_add = esc_html_hl_regions($add, 'marked',
5227                         [$prefix_len, @add - $suffix_len], -nbsp=>1);
5228         } else {
5229                 $esc_rem = esc_html($rem, -nbsp=>1);
5230                 $esc_add = esc_html($add, -nbsp=>1);
5231         }
5232
5233         return format_diff_line(\$esc_rem, 'rem'),
5234                format_diff_line(\$esc_add, 'add');
5235 }
5236
5237 # HTML-format diff context, removed and added lines.
5238 sub format_ctx_rem_add_lines {
5239         my ($ctx, $rem, $add, $num_parents) = @_;
5240         my (@new_ctx, @new_rem, @new_add);
5241         my $can_highlight = 0;
5242         my $is_combined = ($num_parents > 1);
5243
5244         # Highlight if every removed line has a corresponding added line.
5245         if (@$add > 0 && @$add == @$rem) {
5246                 $can_highlight = 1;
5247
5248                 # Highlight lines in combined diff only if the chunk contains
5249                 # diff between the same version, e.g.
5250                 #
5251                 #    - a
5252                 #   -  b
5253                 #    + c
5254                 #   +  d
5255                 #
5256                 # Otherwise the highlightling would be confusing.
5257                 if ($is_combined) {
5258                         for (my $i = 0; $i < @$add; $i++) {
5259                                 my $prefix_rem = substr($rem->[$i], 0, $num_parents);
5260                                 my $prefix_add = substr($add->[$i], 0, $num_parents);
5261
5262                                 $prefix_rem =~ s/-/+/g;
5263
5264                                 if ($prefix_rem ne $prefix_add) {
5265                                         $can_highlight = 0;
5266                                         last;
5267                                 }
5268                         }
5269                 }
5270         }
5271
5272         if ($can_highlight) {
5273                 for (my $i = 0; $i < @$add; $i++) {
5274                         my ($line_rem, $line_add) = format_rem_add_lines_pair(
5275                                 $rem->[$i], $add->[$i], $num_parents);
5276                         push @new_rem, $line_rem;
5277                         push @new_add, $line_add;
5278                 }
5279         } else {
5280                 @new_rem = map { format_diff_line($_, 'rem') } @$rem;
5281                 @new_add = map { format_diff_line($_, 'add') } @$add;
5282         }
5283
5284         @new_ctx = map { format_diff_line($_, 'ctx') } @$ctx;
5285
5286         return (\@new_ctx, \@new_rem, \@new_add);
5287 }
5288
5289 # Print context lines and then rem/add lines.
5290 sub print_diff_lines {
5291         my ($ctx, $rem, $add, $diff_style, $num_parents) = @_;
5292         my $is_combined = $num_parents > 1;
5293
5294         ($ctx, $rem, $add) = format_ctx_rem_add_lines($ctx, $rem, $add,
5295                 $num_parents);
5296
5297         if ($diff_style eq 'sidebyside' && !$is_combined) {
5298                 print_sidebyside_diff_lines($ctx, $rem, $add);
5299         } else {
5300                 # default 'inline' style and unknown styles
5301                 print_inline_diff_lines($ctx, $rem, $add);
5302         }
5303 }
5304
5305 sub print_diff_chunk {
5306         my ($diff_style, $num_parents, $from, $to, @chunk) = @_;
5307         my (@ctx, @rem, @add);
5308
5309         # The class of the previous line.
5310         my $prev_class = '';
5311
5312         return unless @chunk;
5313
5314         # incomplete last line might be among removed or added lines,
5315         # or both, or among context lines: find which
5316         for (my $i = 1; $i < @chunk; $i++) {
5317                 if ($chunk[$i][0] eq 'incomplete') {
5318                         $chunk[$i][0] = $chunk[$i-1][0];
5319                 }
5320         }
5321
5322         # guardian
5323         push @chunk, ["", ""];
5324
5325         foreach my $line_info (@chunk) {
5326                 my ($class, $line) = @$line_info;
5327
5328                 # print chunk headers
5329                 if ($class && $class eq 'chunk_header') {
5330                         print format_diff_line($line, $class, $from, $to);
5331                         next;
5332                 }
5333
5334                 ## print from accumulator when have some add/rem lines or end
5335                 # of chunk (flush context lines), or when have add and rem
5336                 # lines and new block is reached (otherwise add/rem lines could
5337                 # be reordered)
5338                 if (!$class || ((@rem || @add) && $class eq 'ctx') ||
5339                     (@rem && @add && $class ne $prev_class)) {
5340                         print_diff_lines(\@ctx, \@rem, \@add,
5341                                          $diff_style, $num_parents);
5342                         @ctx = @rem = @add = ();
5343                 }
5344
5345                 ## adding lines to accumulator
5346                 # guardian value
5347                 last unless $line;
5348                 # rem, add or change
5349                 if ($class eq 'rem') {
5350                         push @rem, $line;
5351                 } elsif ($class eq 'add') {
5352                         push @add, $line;
5353                 }
5354                 # context line
5355                 if ($class eq 'ctx') {
5356                         push @ctx, $line;
5357                 }
5358
5359                 $prev_class = $class;
5360         }
5361 }
5362
5363 sub git_patchset_body {
5364         my ($fd, $diff_style, $difftree, $hash, @hash_parents) = @_;
5365         my ($hash_parent) = $hash_parents[0];
5366
5367         my $is_combined = (@hash_parents > 1);
5368         my $patch_idx = 0;
5369         my $patch_number = 0;
5370         my $patch_line;
5371         my $diffinfo;
5372         my $to_name;
5373         my (%from, %to);
5374         my @chunk; # for side-by-side diff
5375
5376         print "<div class=\"patchset\">\n";
5377
5378         # skip to first patch
5379         while ($patch_line = <$fd>) {
5380                 chomp $patch_line;
5381
5382                 last if ($patch_line =~ m/^diff /);
5383         }
5384
5385  PATCH:
5386         while ($patch_line) {
5387
5388                 # parse "git diff" header line
5389                 if ($patch_line =~ m/^diff --git (\"(?:[^\\\"]*(?:\\.[^\\\"]*)*)\"|[^ "]*) (.*)$/) {
5390                         # $1 is from_name, which we do not use
5391                         $to_name = unquote($2);
5392                         $to_name =~ s!^b/!!;
5393                 } elsif ($patch_line =~ m/^diff --(cc|combined) ("?.*"?)$/) {
5394                         # $1 is 'cc' or 'combined', which we do not use
5395                         $to_name = unquote($2);
5396                 } else {
5397                         $to_name = undef;
5398                 }
5399
5400                 # check if current patch belong to current raw line
5401                 # and parse raw git-diff line if needed
5402                 if (is_patch_split($diffinfo, { 'to_file' => $to_name })) {
5403                         # this is continuation of a split patch
5404                         print "<div class=\"patch cont\">\n";
5405                 } else {
5406                         # advance raw git-diff output if needed
5407                         $patch_idx++ if defined $diffinfo;
5408
5409                         # read and prepare patch information
5410                         $diffinfo = parsed_difftree_line($difftree->[$patch_idx]);
5411
5412                         # compact combined diff output can have some patches skipped
5413                         # find which patch (using pathname of result) we are at now;
5414                         if ($is_combined) {
5415                                 while ($to_name ne $diffinfo->{'to_file'}) {
5416                                         print "<div class=\"patch\" id=\"patch". ($patch_idx+1) ."\">\n" .
5417                                               format_diff_cc_simplified($diffinfo, @hash_parents) .
5418                                               "</div>\n";  # class="patch"
5419
5420                                         $patch_idx++;
5421                                         $patch_number++;
5422
5423                                         last if $patch_idx > $#$difftree;
5424                                         $diffinfo = parsed_difftree_line($difftree->[$patch_idx]);
5425                                 }
5426                         }
5427
5428                         # modifies %from, %to hashes
5429                         parse_from_to_diffinfo($diffinfo, \%from, \%to, @hash_parents);
5430
5431                         # this is first patch for raw difftree line with $patch_idx index
5432                         # we index @$difftree array from 0, but number patches from 1
5433                         print "<div class=\"patch\" id=\"patch". ($patch_idx+1) ."\">\n";
5434                 }
5435
5436                 # git diff header
5437                 #assert($patch_line =~ m/^diff /) if DEBUG;
5438                 #assert($patch_line !~ m!$/$!) if DEBUG; # is chomp-ed
5439                 $patch_number++;
5440                 # print "git diff" header
5441                 print format_git_diff_header_line($patch_line, $diffinfo,
5442                                                   \%from, \%to);
5443
5444                 # print extended diff header
5445                 print "<div class=\"diff extended_header\">\n";
5446         EXTENDED_HEADER:
5447                 while ($patch_line = <$fd>) {
5448                         chomp $patch_line;
5449
5450                         last EXTENDED_HEADER if ($patch_line =~ m/^--- |^diff /);
5451
5452                         print format_extended_diff_header_line($patch_line, $diffinfo,
5453                                                                \%from, \%to);
5454                 }
5455                 print "</div>\n"; # class="diff extended_header"
5456
5457                 # from-file/to-file diff header
5458                 if (! $patch_line) {
5459                         print "</div>\n"; # class="patch"
5460                         last PATCH;
5461                 }
5462                 next PATCH if ($patch_line =~ m/^diff /);
5463                 #assert($patch_line =~ m/^---/) if DEBUG;
5464
5465                 my $last_patch_line = $patch_line;
5466                 $patch_line = <$fd>;
5467                 chomp $patch_line;
5468                 #assert($patch_line =~ m/^\+\+\+/) if DEBUG;
5469
5470                 print format_diff_from_to_header($last_patch_line, $patch_line,
5471                                                  $diffinfo, \%from, \%to,
5472                                                  @hash_parents);
5473
5474                 # the patch itself
5475         LINE:
5476                 while ($patch_line = <$fd>) {
5477                         chomp $patch_line;
5478
5479                         next PATCH if ($patch_line =~ m/^diff /);
5480
5481                         my $class = diff_line_class($patch_line, \%from, \%to);
5482
5483                         if ($class eq 'chunk_header') {
5484                                 print_diff_chunk($diff_style, scalar @hash_parents, \%from, \%to, @chunk);
5485                                 @chunk = ();
5486                         }
5487
5488                         push @chunk, [ $class, $patch_line ];
5489                 }
5490
5491         } continue {
5492                 if (@chunk) {
5493                         print_diff_chunk($diff_style, scalar @hash_parents, \%from, \%to, @chunk);
5494                         @chunk = ();
5495                 }
5496                 print "</div>\n"; # class="patch"
5497         }
5498
5499         # for compact combined (--cc) format, with chunk and patch simplification
5500         # the patchset might be empty, but there might be unprocessed raw lines
5501         for (++$patch_idx if $patch_number > 0;
5502              $patch_idx < @$difftree;
5503              ++$patch_idx) {
5504                 # read and prepare patch information
5505                 $diffinfo = parsed_difftree_line($difftree->[$patch_idx]);
5506
5507                 # generate anchor for "patch" links in difftree / whatchanged part
5508                 print "<div class=\"patch\" id=\"patch". ($patch_idx+1) ."\">\n" .
5509                       format_diff_cc_simplified($diffinfo, @hash_parents) .
5510                       "</div>\n";  # class="patch"
5511
5512                 $patch_number++;
5513         }
5514
5515         if ($patch_number == 0) {
5516                 if (@hash_parents > 1) {
5517                         print "<div class=\"diff nodifferences\">Trivial merge</div>\n";
5518                 } else {
5519                         print "<div class=\"diff nodifferences\">No differences found</div>\n";
5520                 }
5521         }
5522
5523         print "</div>\n"; # class="patchset"
5524 }
5525
5526 # . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
5527
5528 sub git_project_search_form {
5529         my ($searchtext, $search_use_regexp) = @_;
5530
5531         my $limit = '';
5532         if ($project_filter) {
5533                 $limit = " in '$project_filter/'";
5534         }
5535
5536         print "<div class=\"projsearch\">\n";
5537         print $cgi->start_form(-method => 'get', -action => $my_uri) .
5538               $cgi->hidden(-name => 'a', -value => 'project_list')  . "\n";
5539         print $cgi->hidden(-name => 'pf', -value => $project_filter). "\n"
5540                 if (defined $project_filter);
5541         print $cgi->textfield(-name => 's', -value => $searchtext,
5542                               -title => "Search project by name and description$limit",
5543                               -size => 60) . "\n" .
5544               "<span title=\"Extended regular expression\">" .
5545               $cgi->checkbox(-name => 'sr', -value => 1, -label => 're',
5546                              -checked => $search_use_regexp) .
5547               "</span>\n" .
5548               $cgi->submit(-name => 'btnS', -value => 'Search') .
5549               $cgi->end_form() . "\n" .
5550               $cgi->a({-href => href(project => undef, searchtext => undef,
5551                                      project_filter => $project_filter)},
5552                       esc_html("List all projects$limit")) . "<br />\n";
5553         print "</div>\n";
5554 }
5555
5556 # entry for given @keys needs filling if at least one of keys in list
5557 # is not present in %$project_info
5558 sub project_info_needs_filling {
5559         my ($project_info, @keys) = @_;
5560
5561         # return List::MoreUtils::any { !exists $project_info->{$_} } @keys;
5562         foreach my $key (@keys) {
5563                 if (!exists $project_info->{$key}) {
5564                         return 1;
5565                 }
5566         }
5567         return;
5568 }
5569
5570 # fills project list info (age, description, owner, category, forks, etc.)
5571 # for each project in the list, removing invalid projects from
5572 # returned list, or fill only specified info.
5573 #
5574 # Invalid projects are removed from the returned list if and only if you
5575 # ask 'age' or 'age_string' to be filled, because they are the only fields
5576 # that run unconditionally git command that requires repository, and
5577 # therefore do always check if project repository is invalid.
5578 #
5579 # USAGE:
5580 # * fill_project_list_info(\@project_list, 'descr_long', 'ctags')
5581 #   ensures that 'descr_long' and 'ctags' fields are filled
5582 # * @project_list = fill_project_list_info(\@project_list)
5583 #   ensures that all fields are filled (and invalid projects removed)
5584 #
5585 # NOTE: modifies $projlist, but does not remove entries from it
5586 sub fill_project_list_info {
5587         my ($projlist, @wanted_keys) = @_;
5588         my @projects;
5589         my $filter_set = sub { return @_; };
5590         if (@wanted_keys) {
5591                 my %wanted_keys = map { $_ => 1 } @wanted_keys;
5592                 $filter_set = sub { return grep { $wanted_keys{$_} } @_; };
5593         }
5594
5595         my $show_ctags = gitweb_check_feature('ctags');
5596  PROJECT:
5597         foreach my $pr (@$projlist) {
5598                 if (project_info_needs_filling($pr, $filter_set->('age', 'age_string'))) {
5599                         my (@activity) = git_get_last_activity($pr->{'path'});
5600                         unless (@activity) {
5601                                 next PROJECT;
5602                         }
5603                         ($pr->{'age'}, $pr->{'age_string'}) = @activity;
5604                 }
5605                 if (project_info_needs_filling($pr, $filter_set->('descr', 'descr_long'))) {
5606                         my $descr = git_get_project_description($pr->{'path'}) || "";
5607                         $descr = to_utf8($descr);
5608                         $pr->{'descr_long'} = $descr;
5609                         $pr->{'descr'} = chop_str($descr, $projects_list_description_width, 5);
5610                 }
5611                 if (project_info_needs_filling($pr, $filter_set->('owner'))) {
5612                         $pr->{'owner'} = git_get_project_owner("$pr->{'path'}") || "";
5613                 }
5614                 if ($show_ctags &&
5615                     project_info_needs_filling($pr, $filter_set->('ctags'))) {
5616                         $pr->{'ctags'} = git_get_project_ctags($pr->{'path'});
5617                 }
5618                 if ($projects_list_group_categories &&
5619                     project_info_needs_filling($pr, $filter_set->('category'))) {
5620                         my $cat = git_get_project_category($pr->{'path'}) ||
5621                                                            $project_list_default_category;
5622                         $pr->{'category'} = to_utf8($cat);
5623                 }
5624
5625                 push @projects, $pr;
5626         }
5627
5628         return @projects;
5629 }
5630
5631 sub sort_projects_list {
5632         my ($projlist, $order) = @_;
5633
5634         sub order_str {
5635                 my $key = shift;
5636                 return sub { $a->{$key} cmp $b->{$key} };
5637         }
5638
5639         sub order_num_then_undef {
5640                 my $key = shift;
5641                 return sub {
5642                         defined $a->{$key} ?
5643                                 (defined $b->{$key} ? $a->{$key} <=> $b->{$key} : -1) :
5644                                 (defined $b->{$key} ? 1 : 0)
5645                 };
5646         }
5647
5648         my %orderings = (
5649                 project => order_str('path'),
5650                 descr => order_str('descr_long'),
5651                 owner => order_str('owner'),
5652                 age => order_num_then_undef('age'),
5653         );
5654
5655         my $ordering = $orderings{$order};
5656         return defined $ordering ? sort $ordering @$projlist : @$projlist;
5657 }
5658
5659 # returns a hash of categories, containing the list of project
5660 # belonging to each category
5661 sub build_projlist_by_category {
5662         my ($projlist, $from, $to) = @_;
5663         my %categories;
5664
5665         $from = 0 unless defined $from;
5666         $to = $#$projlist if (!defined $to || $#$projlist < $to);
5667
5668         for (my $i = $from; $i <= $to; $i++) {
5669                 my $pr = $projlist->[$i];
5670                 push @{$categories{ $pr->{'category'} }}, $pr;
5671         }
5672
5673         return wantarray ? %categories : \%categories;
5674 }
5675
5676 # print 'sort by' <th> element, generating 'sort by $name' replay link
5677 # if that order is not selected
5678 sub print_sort_th {
5679         print format_sort_th(@_);
5680 }
5681
5682 sub format_sort_th {
5683         my ($name, $order, $header) = @_;
5684         my $sort_th = "";
5685         $header ||= ucfirst($name);
5686
5687         if ($order eq $name) {
5688                 $sort_th .= "<th>$header</th>\n";
5689         } else {
5690                 $sort_th .= "<th>" .
5691                             $cgi->a({-href => href(-replay=>1, order=>$name),
5692                                      -class => "header"}, $header) .
5693                             "</th>\n";
5694         }
5695
5696         return $sort_th;
5697 }
5698
5699 sub git_project_list_rows {
5700         my ($projlist, $from, $to, $check_forks) = @_;
5701
5702         $from = 0 unless defined $from;
5703         $to = $#$projlist if (!defined $to || $#$projlist < $to);
5704
5705         my $alternate = 1;
5706         for (my $i = $from; $i <= $to; $i++) {
5707                 my $pr = $projlist->[$i];
5708
5709                 if ($alternate) {
5710                         print "<tr class=\"dark\">\n";
5711                 } else {
5712                         print "<tr class=\"light\">\n";
5713                 }
5714                 $alternate ^= 1;
5715
5716                 if ($check_forks) {
5717                         print "<td>";
5718                         if ($pr->{'forks'}) {
5719                                 my $nforks = scalar @{$pr->{'forks'}};
5720                                 if ($nforks > 0) {
5721                                         print $cgi->a({-href => href(project=>$pr->{'path'}, action=>"forks"),
5722                                                        -title => "$nforks forks"}, "+");
5723                                 } else {
5724                                         print $cgi->span({-title => "$nforks forks"}, "+");
5725                                 }
5726                         }
5727                         print "</td>\n";
5728                 }
5729                 print "<td>" . $cgi->a({-href => href(project=>$pr->{'path'}, action=>"summary"),
5730                                         -class => "list"},
5731                                        esc_html_match_hl($pr->{'path'}, $search_regexp)) .
5732                       "</td>\n" .
5733                       "<td>" . $cgi->a({-href => href(project=>$pr->{'path'}, action=>"summary"),
5734                                         -class => "list",
5735                                         -title => $pr->{'descr_long'}},
5736                                         $search_regexp
5737                                         ? esc_html_match_hl_chopped($pr->{'descr_long'},
5738                                                                     $pr->{'descr'}, $search_regexp)
5739                                         : esc_html($pr->{'descr'})) .
5740                       "</td>\n";
5741                 unless ($omit_owner) {
5742                         print "<td><i>" . chop_and_escape_str($pr->{'owner'}, 15) . "</i></td>\n";
5743                 }
5744                 unless ($omit_age_column) {
5745                         print "<td class=\"". age_class($pr->{'age'}) . "\">" .
5746                             (defined $pr->{'age_string'} ? $pr->{'age_string'} : "No commits") . "</td>\n";
5747                 }
5748                 print"<td class=\"link\">" .
5749                       $cgi->a({-href => href(project=>$pr->{'path'}, action=>"summary")}, "summary")   . " | " .
5750                       $cgi->a({-href => href(project=>$pr->{'path'}, action=>"shortlog")}, "shortlog") . " | " .
5751                       $cgi->a({-href => href(project=>$pr->{'path'}, action=>"log")}, "log") . " | " .
5752                       $cgi->a({-href => href(project=>$pr->{'path'}, action=>"tree")}, "tree") .
5753                       ($pr->{'forks'} ? " | " . $cgi->a({-href => href(project=>$pr->{'path'}, action=>"forks")}, "forks") : '') .
5754                       "</td>\n" .
5755                       "</tr>\n";
5756         }
5757 }
5758
5759 sub git_project_list_body {
5760         # actually uses global variable $project
5761         my ($projlist, $order, $from, $to, $extra, $no_header) = @_;
5762         my @projects = @$projlist;
5763
5764         my $check_forks = gitweb_check_feature('forks');
5765         my $show_ctags  = gitweb_check_feature('ctags');
5766         my $tagfilter = $show_ctags ? $input_params{'ctag'} : undef;
5767         $check_forks = undef
5768                 if ($tagfilter || $search_regexp);
5769
5770         # filtering out forks before filling info allows to do less work
5771         @projects = filter_forks_from_projects_list(\@projects)
5772                 if ($check_forks);
5773         # search_projects_list pre-fills required info
5774         @projects = search_projects_list(\@projects,
5775                                          'search_regexp' => $search_regexp,
5776                                          'tagfilter'  => $tagfilter)
5777                 if ($tagfilter || $search_regexp);
5778         # fill the rest
5779         my @all_fields = ('descr', 'descr_long', 'ctags', 'category');
5780         push @all_fields, ('age', 'age_string') unless($omit_age_column);
5781         push @all_fields, 'owner' unless($omit_owner);
5782         @projects = fill_project_list_info(\@projects, @all_fields);
5783
5784         $order ||= $default_projects_order;
5785         $from = 0 unless defined $from;
5786         $to = $#projects if (!defined $to || $#projects < $to);
5787
5788         # short circuit
5789         if ($from > $to) {
5790                 print "<center>\n".
5791                       "<b>No such projects found</b><br />\n".
5792                       "Click ".$cgi->a({-href=>href(project=>undef)},"here")." to view all projects<br />\n".
5793                       "</center>\n<br />\n";
5794                 return;
5795         }
5796
5797         @projects = sort_projects_list(\@projects, $order);
5798
5799         if ($show_ctags) {
5800                 my $ctags = git_gather_all_ctags(\@projects);
5801                 my $cloud = git_populate_project_tagcloud($ctags);
5802                 print git_show_project_tagcloud($cloud, 64);
5803         }
5804
5805         print "<table class=\"project_list\">\n";
5806         unless ($no_header) {
5807                 print "<tr>\n";
5808                 if ($check_forks) {
5809                         print "<th></th>\n";
5810                 }
5811                 print_sort_th('project', $order, 'Project');
5812                 print_sort_th('descr', $order, 'Description');
5813                 print_sort_th('owner', $order, 'Owner') unless $omit_owner;
5814                 print_sort_th('age', $order, 'Last Change') unless $omit_age_column;
5815                 print "<th></th>\n" . # for links
5816                       "</tr>\n";
5817         }
5818
5819         if ($projects_list_group_categories) {
5820                 # only display categories with projects in the $from-$to window
5821                 @projects = sort {$a->{'category'} cmp $b->{'category'}} @projects[$from..$to];
5822                 my %categories = build_projlist_by_category(\@projects, $from, $to);
5823                 foreach my $cat (sort keys %categories) {
5824                         unless ($cat eq "") {
5825                                 print "<tr>\n";
5826                                 if ($check_forks) {
5827                                         print "<td></td>\n";
5828                                 }
5829                                 print "<td class=\"category\" colspan=\"5\">".esc_html($cat)."</td>\n";
5830                                 print "</tr>\n";
5831                         }
5832
5833                         git_project_list_rows($categories{$cat}, undef, undef, $check_forks);
5834                 }
5835         } else {
5836                 git_project_list_rows(\@projects, $from, $to, $check_forks);
5837         }
5838
5839         if (defined $extra) {
5840                 print "<tr>\n";
5841                 if ($check_forks) {
5842                         print "<td></td>\n";
5843                 }
5844                 print "<td colspan=\"5\">$extra</td>\n" .
5845                       "</tr>\n";
5846         }
5847         print "</table>\n";
5848 }
5849
5850 sub git_log_body {
5851         # uses global variable $project
5852         my ($commitlist, $from, $to, $refs, $extra) = @_;
5853
5854         $from = 0 unless defined $from;
5855         $to = $#{$commitlist} if (!defined $to || $#{$commitlist} < $to);
5856
5857         for (my $i = 0; $i <= $to; $i++) {
5858                 my %co = %{$commitlist->[$i]};
5859                 next if !%co;
5860                 my $commit = $co{'id'};
5861                 my $ref = format_ref_marker($refs, $commit);
5862                 git_print_header_div('commit',
5863                                "<span class=\"age\">$co{'age_string'}</span>" .
5864                                esc_html($co{'title'}) . $ref,
5865                                $commit);
5866                 print "<div class=\"title_text\">\n" .
5867                       "<div class=\"log_link\">\n" .
5868                       $cgi->a({-href => href(action=>"commit", hash=>$commit)}, "commit") .
5869                       " | " .
5870                       $cgi->a({-href => href(action=>"commitdiff", hash=>$commit)}, "commitdiff") .
5871                       " | " .
5872                       $cgi->a({-href => href(action=>"tree", hash=>$commit, hash_base=>$commit)}, "tree") .
5873                       "<br/>\n" .
5874                       "</div>\n";
5875                       git_print_authorship(\%co, -tag => 'span');
5876                       print "<br/>\n</div>\n";
5877
5878                 print "<div class=\"log_body\">\n";
5879                 git_print_log($co{'comment'}, -final_empty_line=> 1);
5880                 print "</div>\n";
5881         }
5882         if ($extra) {
5883                 print "<div class=\"page_nav\">\n";
5884                 print "$extra\n";
5885                 print "</div>\n";
5886         }
5887 }
5888
5889 sub git_shortlog_body {
5890         # uses global variable $project
5891         my ($commitlist, $from, $to, $refs, $extra) = @_;
5892
5893         $from = 0 unless defined $from;
5894         $to = $#{$commitlist} if (!defined $to || $#{$commitlist} < $to);
5895
5896         print "<table class=\"shortlog\">\n";
5897         my $alternate = 1;
5898         for (my $i = $from; $i <= $to; $i++) {
5899                 my %co = %{$commitlist->[$i]};
5900                 my $commit = $co{'id'};
5901                 my $ref = format_ref_marker($refs, $commit);
5902                 if ($alternate) {
5903                         print "<tr class=\"dark\">\n";
5904                 } else {
5905                         print "<tr class=\"light\">\n";
5906                 }
5907                 $alternate ^= 1;
5908                 # git_summary() used print "<td><i>$co{'age_string'}</i></td>\n" .
5909                 print "<td title=\"$co{'age_string_age'}\"><i>$co{'age_string_date'}</i></td>\n" .
5910                       format_author_html('td', \%co, 10) . "<td>";
5911                 print format_subject_html($co{'title'}, $co{'title_short'},
5912                                           href(action=>"commit", hash=>$commit), $ref);
5913                 print "</td>\n" .
5914                       "<td class=\"link\">" .
5915                       $cgi->a({-href => href(action=>"commit", hash=>$commit)}, "commit") . " | " .
5916                       $cgi->a({-href => href(action=>"commitdiff", hash=>$commit)}, "commitdiff") . " | " .
5917                       $cgi->a({-href => href(action=>"tree", hash=>$commit, hash_base=>$commit)}, "tree");
5918                 my $snapshot_links = format_snapshot_links($commit);
5919                 if (defined $snapshot_links) {
5920                         print " | " . $snapshot_links;
5921                 }
5922                 print "</td>\n" .
5923                       "</tr>\n";
5924         }
5925         if (defined $extra) {
5926                 print "<tr>\n" .
5927                       "<td colspan=\"4\">$extra</td>\n" .
5928                       "</tr>\n";
5929         }
5930         print "</table>\n";
5931 }
5932
5933 sub git_history_body {
5934         # Warning: assumes constant type (blob or tree) during history
5935         my ($commitlist, $from, $to, $refs, $extra,
5936             $file_name, $file_hash, $ftype) = @_;
5937
5938         $from = 0 unless defined $from;
5939         $to = $#{$commitlist} unless (defined $to && $to <= $#{$commitlist});
5940
5941         print "<table class=\"history\">\n";
5942         my $alternate = 1;
5943         for (my $i = $from; $i <= $to; $i++) {
5944                 my %co = %{$commitlist->[$i]};
5945                 if (!%co) {
5946                         next;
5947                 }
5948                 my $commit = $co{'id'};
5949
5950                 my $ref = format_ref_marker($refs, $commit);
5951
5952                 if ($alternate) {
5953                         print "<tr class=\"dark\">\n";
5954                 } else {
5955                         print "<tr class=\"light\">\n";
5956                 }
5957                 $alternate ^= 1;
5958                 print "<td title=\"$co{'age_string_age'}\"><i>$co{'age_string_date'}</i></td>\n" .
5959         # shortlog:   format_author_html('td', \%co, 10)
5960                       format_author_html('td', \%co, 15, 3) . "<td>";
5961                 # originally git_history used chop_str($co{'title'}, 50)
5962                 print format_subject_html($co{'title'}, $co{'title_short'},
5963                                           href(action=>"commit", hash=>$commit), $ref);
5964                 print "</td>\n" .
5965                       "<td class=\"link\">" .
5966                       $cgi->a({-href => href(action=>$ftype, hash_base=>$commit, file_name=>$file_name)}, $ftype) . " | " .
5967                       $cgi->a({-href => href(action=>"commitdiff", hash=>$commit)}, "commitdiff");
5968
5969                 if ($ftype eq 'blob') {
5970                         print " | " .
5971                               $cgi->a({-href => href(action=>"blob_plain", hash_base=>$commit, file_name=>$file_name)}, "raw");
5972
5973                         my $blob_current = $file_hash;
5974                         my $blob_parent  = git_get_hash_by_path($commit, $file_name);
5975                         if (defined $blob_current && defined $blob_parent &&
5976                                         $blob_current ne $blob_parent) {
5977                                 print " | " .
5978                                         $cgi->a({-href => href(action=>"blobdiff",
5979                                                                hash=>$blob_current, hash_parent=>$blob_parent,
5980                                                                hash_base=>$hash_base, hash_parent_base=>$commit,
5981                                                                file_name=>$file_name)},
5982                                                 "diff to current");
5983                         }
5984                 }
5985                 print "</td>\n" .
5986                       "</tr>\n";
5987         }
5988         if (defined $extra) {
5989                 print "<tr>\n" .
5990                       "<td colspan=\"4\">$extra</td>\n" .
5991                       "</tr>\n";
5992         }
5993         print "</table>\n";
5994 }
5995
5996 sub git_tags_body {
5997         # uses global variable $project
5998         my ($taglist, $from, $to, $extra) = @_;
5999         $from = 0 unless defined $from;
6000         $to = $#{$taglist} if (!defined $to || $#{$taglist} < $to);
6001
6002         print "<table class=\"tags\">\n";
6003         my $alternate = 1;
6004         for (my $i = $from; $i <= $to; $i++) {
6005                 my $entry = $taglist->[$i];
6006                 my %tag = %$entry;
6007                 my $comment = $tag{'subject'};
6008                 my $comment_short;
6009                 if (defined $comment) {
6010                         $comment_short = chop_str($comment, 30, 5);
6011                 }
6012                 if ($alternate) {
6013                         print "<tr class=\"dark\">\n";
6014                 } else {
6015                         print "<tr class=\"light\">\n";
6016                 }
6017                 $alternate ^= 1;
6018                 if (defined $tag{'age'}) {
6019                         print "<td><i>$tag{'age'}</i></td>\n";
6020                 } else {
6021                         print "<td></td>\n";
6022                 }
6023                 print "<td>" .
6024                       $cgi->a({-href => href(action=>$tag{'reftype'}, hash=>$tag{'refid'}),
6025                                -class => "list name"}, esc_html($tag{'name'})) .
6026                       "</td>\n" .
6027                       "<td>";
6028                 if (defined $comment) {
6029                         print format_subject_html($comment, $comment_short,
6030                                                   href(action=>"tag", hash=>$tag{'id'}));
6031                 }
6032                 print "</td>\n" .
6033                       "<td class=\"selflink\">";
6034                 if ($tag{'type'} eq "tag") {
6035                         print $cgi->a({-href => href(action=>"tag", hash=>$tag{'id'})}, "tag");
6036                 } else {
6037                         print "&nbsp;";
6038                 }
6039                 print "</td>\n" .
6040                       "<td class=\"link\">" . " | " .
6041                       $cgi->a({-href => href(action=>$tag{'reftype'}, hash=>$tag{'refid'})}, $tag{'reftype'});
6042                 if ($tag{'reftype'} eq "commit") {
6043                         print " | " . $cgi->a({-href => href(action=>"shortlog", hash=>$tag{'fullname'})}, "shortlog") .
6044                               " | " . $cgi->a({-href => href(action=>"log", hash=>$tag{'fullname'})}, "log");
6045                 } elsif ($tag{'reftype'} eq "blob") {
6046                         print " | " . $cgi->a({-href => href(action=>"blob_plain", hash=>$tag{'refid'})}, "raw");
6047                 }
6048                 print "</td>\n" .
6049                       "</tr>";
6050         }
6051         if (defined $extra) {
6052                 print "<tr>\n" .
6053                       "<td colspan=\"5\">$extra</td>\n" .
6054                       "</tr>\n";
6055         }
6056         print "</table>\n";
6057 }
6058
6059 sub git_heads_body {
6060         # uses global variable $project
6061         my ($headlist, $head_at, $from, $to, $extra) = @_;
6062         $from = 0 unless defined $from;
6063         $to = $#{$headlist} if (!defined $to || $#{$headlist} < $to);
6064
6065         print "<table class=\"heads\">\n";
6066         my $alternate = 1;
6067         for (my $i = $from; $i <= $to; $i++) {
6068                 my $entry = $headlist->[$i];
6069                 my %ref = %$entry;
6070                 my $curr = defined $head_at && $ref{'id'} eq $head_at;
6071                 if ($alternate) {
6072                         print "<tr class=\"dark\">\n";
6073                 } else {
6074                         print "<tr class=\"light\">\n";
6075                 }
6076                 $alternate ^= 1;
6077                 print "<td><i>$ref{'age'}</i></td>\n" .
6078                       ($curr ? "<td class=\"current_head\">" : "<td>") .
6079                       $cgi->a({-href => href(action=>"shortlog", hash=>$ref{'fullname'}),
6080                                -class => "list name"},esc_html($ref{'name'})) .
6081                       "</td>\n" .
6082                       "<td class=\"link\">" .
6083                       $cgi->a({-href => href(action=>"shortlog", hash=>$ref{'fullname'})}, "shortlog") . " | " .
6084                       $cgi->a({-href => href(action=>"log", hash=>$ref{'fullname'})}, "log") . " | " .
6085                       $cgi->a({-href => href(action=>"tree", hash=>$ref{'fullname'}, hash_base=>$ref{'fullname'})}, "tree") .
6086                       "</td>\n" .
6087                       "</tr>";
6088         }
6089         if (defined $extra) {
6090                 print "<tr>\n" .
6091                       "<td colspan=\"3\">$extra</td>\n" .
6092                       "</tr>\n";
6093         }
6094         print "</table>\n";
6095 }
6096
6097 # Display a single remote block
6098 sub git_remote_block {
6099         my ($remote, $rdata, $limit, $head) = @_;
6100
6101         my $heads = $rdata->{'heads'};
6102         my $fetch = $rdata->{'fetch'};
6103         my $push = $rdata->{'push'};
6104
6105         my $urls_table = "<table class=\"projects_list\">\n" ;
6106
6107         if (defined $fetch) {
6108                 if ($fetch eq $push) {
6109                         $urls_table .= format_repo_url("URL", $fetch);
6110                 } else {
6111                         $urls_table .= format_repo_url("Fetch URL", $fetch);
6112                         $urls_table .= format_repo_url("Push URL", $push) if defined $push;
6113                 }
6114         } elsif (defined $push) {
6115                 $urls_table .= format_repo_url("Push URL", $push);
6116         } else {
6117                 $urls_table .= format_repo_url("", "No remote URL");
6118         }
6119
6120         $urls_table .= "</table>\n";
6121
6122         my $dots;
6123         if (defined $limit && $limit < @$heads) {
6124                 $dots = $cgi->a({-href => href(action=>"remotes", hash=>$remote)}, "...");
6125         }
6126
6127         print $urls_table;
6128         git_heads_body($heads, $head, 0, $limit, $dots);
6129 }
6130
6131 # Display a list of remote names with the respective fetch and push URLs
6132 sub git_remotes_list {
6133         my ($remotedata, $limit) = @_;
6134         print "<table class=\"heads\">\n";
6135         my $alternate = 1;
6136         my @remotes = sort keys %$remotedata;
6137
6138         my $limited = $limit && $limit < @remotes;
6139
6140         $#remotes = $limit - 1 if $limited;
6141
6142         while (my $remote = shift @remotes) {
6143                 my $rdata = $remotedata->{$remote};
6144                 my $fetch = $rdata->{'fetch'};
6145                 my $push = $rdata->{'push'};
6146                 if ($alternate) {
6147                         print "<tr class=\"dark\">\n";
6148                 } else {
6149                         print "<tr class=\"light\">\n";
6150                 }
6151                 $alternate ^= 1;
6152                 print "<td>" .
6153                       $cgi->a({-href=> href(action=>'remotes', hash=>$remote),
6154                                -class=> "list name"},esc_html($remote)) .
6155                       "</td>";
6156                 print "<td class=\"link\">" .
6157                       (defined $fetch ? $cgi->a({-href=> $fetch}, "fetch") : "fetch") .
6158                       " | " .
6159                       (defined $push ? $cgi->a({-href=> $push}, "push") : "push") .
6160                       "</td>";
6161
6162                 print "</tr>\n";
6163         }
6164
6165         if ($limited) {
6166                 print "<tr>\n" .
6167                       "<td colspan=\"3\">" .
6168                       $cgi->a({-href => href(action=>"remotes")}, "...") .
6169                       "</td>\n" . "</tr>\n";
6170         }
6171
6172         print "</table>";
6173 }
6174
6175 # Display remote heads grouped by remote, unless there are too many
6176 # remotes, in which case we only display the remote names
6177 sub git_remotes_body {
6178         my ($remotedata, $limit, $head) = @_;
6179         if ($limit and $limit < keys %$remotedata) {
6180                 git_remotes_list($remotedata, $limit);
6181         } else {
6182                 fill_remote_heads($remotedata);
6183                 while (my ($remote, $rdata) = each %$remotedata) {
6184                         git_print_section({-class=>"remote", -id=>$remote},
6185                                 ["remotes", $remote, $remote], sub {
6186                                         git_remote_block($remote, $rdata, $limit, $head);
6187                                 });
6188                 }
6189         }
6190 }
6191
6192 sub git_search_message {
6193         my %co = @_;
6194
6195         my $greptype;
6196         if ($searchtype eq 'commit') {
6197                 $greptype = "--grep=";
6198         } elsif ($searchtype eq 'author') {
6199                 $greptype = "--author=";
6200         } elsif ($searchtype eq 'committer') {
6201                 $greptype = "--committer=";
6202         }
6203         $greptype .= $searchtext;
6204         my @commitlist = parse_commits($hash, 101, (100 * $page), undef,
6205                                        $greptype, '--regexp-ignore-case',
6206                                        $search_use_regexp ? '--extended-regexp' : '--fixed-strings');
6207
6208         my $paging_nav = '';
6209         if ($page > 0) {
6210                 $paging_nav .=
6211                         $cgi->a({-href => href(-replay=>1, page=>undef)},
6212                                 "first") .
6213                         " &sdot; " .
6214                         $cgi->a({-href => href(-replay=>1, page=>$page-1),
6215                                  -accesskey => "p", -title => "Alt-p"}, "prev");
6216         } else {
6217                 $paging_nav .= "first &sdot; prev";
6218         }
6219         my $next_link = '';
6220         if ($#commitlist >= 100) {
6221                 $next_link =
6222                         $cgi->a({-href => href(-replay=>1, page=>$page+1),
6223                                  -accesskey => "n", -title => "Alt-n"}, "next");
6224                 $paging_nav .= " &sdot; $next_link";
6225         } else {
6226                 $paging_nav .= " &sdot; next";
6227         }
6228
6229         git_header_html();
6230
6231         git_print_page_nav('','', $hash,$co{'tree'},$hash, $paging_nav);
6232         git_print_header_div('commit', esc_html($co{'title'}), $hash);
6233         if ($page == 0 && !@commitlist) {
6234                 print "<p>No match.</p>\n";
6235         } else {
6236                 git_search_grep_body(\@commitlist, 0, 99, $next_link);
6237         }
6238
6239         git_footer_html();
6240 }
6241
6242 sub git_search_changes {
6243         my %co = @_;
6244
6245         local $/ = "\n";
6246         open my $fd, '-|', git_cmd(), '--no-pager', 'log', @diff_opts,
6247                 '--pretty=format:%H', '--no-abbrev', '--raw', "-S$searchtext",
6248                 ($search_use_regexp ? '--pickaxe-regex' : ())
6249                         or die_error(500, "Open git-log failed");
6250
6251         git_header_html();
6252
6253         git_print_page_nav('','', $hash,$co{'tree'},$hash);
6254         git_print_header_div('commit', esc_html($co{'title'}), $hash);
6255
6256         print "<table class=\"pickaxe search\">\n";
6257         my $alternate = 1;
6258         undef %co;
6259         my @files;
6260         while (my $line = <$fd>) {
6261                 chomp $line;
6262                 next unless $line;
6263
6264                 my %set = parse_difftree_raw_line($line);
6265                 if (defined $set{'commit'}) {
6266                         # finish previous commit
6267                         if (%co) {
6268                                 print "</td>\n" .
6269                                       "<td class=\"link\">" .
6270                                       $cgi->a({-href => href(action=>"commit", hash=>$co{'id'})},
6271                                               "commit") .
6272                                       " | " .
6273                                       $cgi->a({-href => href(action=>"tree", hash=>$co{'tree'},
6274                                                              hash_base=>$co{'id'})},
6275                                               "tree") .
6276                                       "</td>\n" .
6277                                       "</tr>\n";
6278                         }
6279
6280                         if ($alternate) {
6281                                 print "<tr class=\"dark\">\n";
6282                         } else {
6283                                 print "<tr class=\"light\">\n";
6284                         }
6285                         $alternate ^= 1;
6286                         %co = parse_commit($set{'commit'});
6287                         my $author = chop_and_escape_str($co{'author_name'}, 15, 5);
6288                         print "<td title=\"$co{'age_string_age'}\"><i>$co{'age_string_date'}</i></td>\n" .
6289                               "<td><i>$author</i></td>\n" .
6290                               "<td>" .
6291                               $cgi->a({-href => href(action=>"commit", hash=>$co{'id'}),
6292                                       -class => "list subject"},
6293                                       chop_and_escape_str($co{'title'}, 50) . "<br/>");
6294                 } elsif (defined $set{'to_id'}) {
6295                         next if ($set{'to_id'} =~ m/^0{40}$/);
6296
6297                         print $cgi->a({-href => href(action=>"blob", hash_base=>$co{'id'},
6298                                                      hash=>$set{'to_id'}, file_name=>$set{'to_file'}),
6299                                       -class => "list"},
6300                                       "<span class=\"match\">" . esc_path($set{'file'}) . "</span>") .
6301                               "<br/>\n";
6302                 }
6303         }
6304         close $fd;
6305
6306         # finish last commit (warning: repetition!)
6307         if (%co) {
6308                 print "</td>\n" .
6309                       "<td class=\"link\">" .
6310                       $cgi->a({-href => href(action=>"commit", hash=>$co{'id'})},
6311                               "commit") .
6312                       " | " .
6313                       $cgi->a({-href => href(action=>"tree", hash=>$co{'tree'},
6314                                              hash_base=>$co{'id'})},
6315                               "tree") .
6316                       "</td>\n" .
6317                       "</tr>\n";
6318         }
6319
6320         print "</table>\n";
6321
6322         git_footer_html();
6323 }
6324
6325 sub git_search_files {
6326         my %co = @_;
6327
6328         local $/ = "\n";
6329         open my $fd, "-|", git_cmd(), 'grep', '-n', '-z',
6330                 $search_use_regexp ? ('-E', '-i') : '-F',
6331                 $searchtext, $co{'tree'}
6332                         or die_error(500, "Open git-grep failed");
6333
6334         git_header_html();
6335
6336         git_print_page_nav('','', $hash,$co{'tree'},$hash);
6337         git_print_header_div('commit', esc_html($co{'title'}), $hash);
6338
6339         print "<table class=\"grep_search\">\n";
6340         my $alternate = 1;
6341         my $matches = 0;
6342         my $lastfile = '';
6343         my $file_href;
6344         while (my $line = <$fd>) {
6345                 chomp $line;
6346                 my ($file, $lno, $ltext, $binary);
6347                 last if ($matches++ > 1000);
6348                 if ($line =~ /^Binary file (.+) matches$/) {
6349                         $file = $1;
6350                         $binary = 1;
6351                 } else {
6352                         ($file, $lno, $ltext) = split(/\0/, $line, 3);
6353                         $file =~ s/^$co{'tree'}://;
6354                 }
6355                 if ($file ne $lastfile) {
6356                         $lastfile and print "</td></tr>\n";
6357                         if ($alternate++) {
6358                                 print "<tr class=\"dark\">\n";
6359                         } else {
6360                                 print "<tr class=\"light\">\n";
6361                         }
6362                         $file_href = href(action=>"blob", hash_base=>$co{'id'},
6363                                           file_name=>$file);
6364                         print "<td class=\"list\">".
6365                                 $cgi->a({-href => $file_href, -class => "list"}, esc_path($file));
6366                         print "</td><td>\n";
6367                         $lastfile = $file;
6368                 }
6369                 if ($binary) {
6370                         print "<div class=\"binary\">Binary file</div>\n";
6371                 } else {
6372                         $ltext = untabify($ltext);
6373                         if ($ltext =~ m/^(.*)($search_regexp)(.*)$/i) {
6374                                 $ltext = esc_html($1, -nbsp=>1);
6375                                 $ltext .= '<span class="match">';
6376                                 $ltext .= esc_html($2, -nbsp=>1);
6377                                 $ltext .= '</span>';
6378                                 $ltext .= esc_html($3, -nbsp=>1);
6379                         } else {
6380                                 $ltext = esc_html($ltext, -nbsp=>1);
6381                         }
6382                         print "<div class=\"pre\">" .
6383                                 $cgi->a({-href => $file_href.'#l'.$lno,
6384                                         -class => "linenr"}, sprintf('%4i', $lno)) .
6385                                 ' ' .  $ltext . "</div>\n";
6386                 }
6387         }
6388         if ($lastfile) {
6389                 print "</td></tr>\n";
6390                 if ($matches > 1000) {
6391                         print "<div class=\"diff nodifferences\">Too many matches, listing trimmed</div>\n";
6392                 }
6393         } else {
6394                 print "<div class=\"diff nodifferences\">No matches found</div>\n";
6395         }
6396         close $fd;
6397
6398         print "</table>\n";
6399
6400         git_footer_html();
6401 }
6402
6403 sub git_search_grep_body {
6404         my ($commitlist, $from, $to, $extra) = @_;
6405         $from = 0 unless defined $from;
6406         $to = $#{$commitlist} if (!defined $to || $#{$commitlist} < $to);
6407
6408         print "<table class=\"commit_search\">\n";
6409         my $alternate = 1;
6410         for (my $i = $from; $i <= $to; $i++) {
6411                 my %co = %{$commitlist->[$i]};
6412                 if (!%co) {
6413                         next;
6414                 }
6415                 my $commit = $co{'id'};
6416                 if ($alternate) {
6417                         print "<tr class=\"dark\">\n";
6418                 } else {
6419                         print "<tr class=\"light\">\n";
6420                 }
6421                 $alternate ^= 1;
6422                 print "<td title=\"$co{'age_string_age'}\"><i>$co{'age_string_date'}</i></td>\n" .
6423                       format_author_html('td', \%co, 15, 5) .
6424                       "<td>" .
6425                       $cgi->a({-href => href(action=>"commit", hash=>$co{'id'}),
6426                                -class => "list subject"},
6427                               chop_and_escape_str($co{'title'}, 50) . "<br/>");
6428                 my $comment = $co{'comment'};
6429                 foreach my $line (@$comment) {
6430                         if ($line =~ m/^(.*?)($search_regexp)(.*)$/i) {
6431                                 my ($lead, $match, $trail) = ($1, $2, $3);
6432                                 $match = chop_str($match, 70, 5, 'center');
6433                                 my $contextlen = int((80 - length($match))/2);
6434                                 $contextlen = 30 if ($contextlen > 30);
6435                                 $lead  = chop_str($lead,  $contextlen, 10, 'left');
6436                                 $trail = chop_str($trail, $contextlen, 10, 'right');
6437
6438                                 $lead  = esc_html($lead);
6439                                 $match = esc_html($match);
6440                                 $trail = esc_html($trail);
6441
6442                                 print "$lead<span class=\"match\">$match</span>$trail<br />";
6443                         }
6444                 }
6445                 print "</td>\n" .
6446                       "<td class=\"link\">" .
6447                       $cgi->a({-href => href(action=>"commit", hash=>$co{'id'})}, "commit") .
6448                       " | " .
6449                       $cgi->a({-href => href(action=>"commitdiff", hash=>$co{'id'})}, "commitdiff") .
6450                       " | " .
6451                       $cgi->a({-href => href(action=>"tree", hash=>$co{'tree'}, hash_base=>$co{'id'})}, "tree");
6452                 print "</td>\n" .
6453                       "</tr>\n";
6454         }
6455         if (defined $extra) {
6456                 print "<tr>\n" .
6457                       "<td colspan=\"3\">$extra</td>\n" .
6458                       "</tr>\n";
6459         }
6460         print "</table>\n";
6461 }
6462
6463 ## ======================================================================
6464 ## ======================================================================
6465 ## actions
6466
6467 sub git_project_list {
6468         my $order = $input_params{'order'};
6469         if (defined $order && $order !~ m/none|project|descr|owner|age/) {
6470                 die_error(400, "Unknown order parameter");
6471         }
6472
6473         my @list = git_get_projects_list($project_filter, $strict_export);
6474         if (!@list) {
6475                 die_error(404, "No projects found");
6476         }
6477
6478         git_header_html();
6479         if (defined $home_text && -f $home_text) {
6480                 print "<div class=\"index_include\">\n";
6481                 insert_file($home_text);
6482                 print "</div>\n";
6483         }
6484
6485         git_project_search_form($searchtext, $search_use_regexp);
6486         git_project_list_body(\@list, $order);
6487         git_footer_html();
6488 }
6489
6490 sub git_forks {
6491         my $order = $input_params{'order'};
6492         if (defined $order && $order !~ m/none|project|descr|owner|age/) {
6493                 die_error(400, "Unknown order parameter");
6494         }
6495
6496         my $filter = $project;
6497         $filter =~ s/\.git$//;
6498         my @list = git_get_projects_list($filter);
6499         if (!@list) {
6500                 die_error(404, "No forks found");
6501         }
6502
6503         git_header_html();
6504         git_print_page_nav('','');
6505         git_print_header_div('summary', "$project forks");
6506         git_project_list_body(\@list, $order);
6507         git_footer_html();
6508 }
6509
6510 sub git_project_index {
6511         my @projects = git_get_projects_list($project_filter, $strict_export);
6512         if (!@projects) {
6513                 die_error(404, "No projects found");
6514         }
6515
6516         print $cgi->header(
6517                 -type => 'text/plain',
6518                 -charset => 'utf-8',
6519                 -content_disposition => 'inline; filename="index.aux"');
6520
6521         foreach my $pr (@projects) {
6522                 if (!exists $pr->{'owner'}) {
6523                         $pr->{'owner'} = git_get_project_owner("$pr->{'path'}");
6524                 }
6525
6526                 my ($path, $owner) = ($pr->{'path'}, $pr->{'owner'});
6527                 # quote as in CGI::Util::encode, but keep the slash, and use '+' for ' '
6528                 $path  =~ s/([^a-zA-Z0-9_.\-\/ ])/sprintf("%%%02X", ord($1))/eg;
6529                 $owner =~ s/([^a-zA-Z0-9_.\-\/ ])/sprintf("%%%02X", ord($1))/eg;
6530                 $path  =~ s/ /\+/g;
6531                 $owner =~ s/ /\+/g;
6532
6533                 print "$path $owner\n";
6534         }
6535 }
6536
6537 sub git_summary {
6538         my $descr = git_get_project_description($project) || "none";
6539         my %co = parse_commit("HEAD");
6540         my %cd = %co ? parse_date($co{'committer_epoch'}, $co{'committer_tz'}) : ();
6541         my $head = $co{'id'};
6542         my $remote_heads = gitweb_check_feature('remote_heads');
6543
6544         my $owner = git_get_project_owner($project);
6545
6546         my $refs = git_get_references();
6547         # These get_*_list functions return one more to allow us to see if
6548         # there are more ...
6549         my @taglist  = git_get_tags_list(16);
6550         my @headlist = git_get_heads_list(16);
6551         my %remotedata = $remote_heads ? git_get_remotes_list() : ();
6552         my @forklist;
6553         my $check_forks = gitweb_check_feature('forks');
6554
6555         if ($check_forks) {
6556                 # find forks of a project
6557                 my $filter = $project;
6558                 $filter =~ s/\.git$//;
6559                 @forklist = git_get_projects_list($filter);
6560                 # filter out forks of forks
6561                 @forklist = filter_forks_from_projects_list(\@forklist)
6562                         if (@forklist);
6563         }
6564
6565         git_header_html();
6566         git_print_page_nav('summary','', $head);
6567
6568         print "<div class=\"title\">&nbsp;</div>\n";
6569         print "<table class=\"projects_list\">\n" .
6570               "<tr id=\"metadata_desc\"><td>description</td><td>" . esc_html($descr) . "</td></tr>\n";
6571         if ($owner and not $omit_owner) {
6572                 print  "<tr id=\"metadata_owner\"><td>owner</td><td>" . esc_html($owner) . "</td></tr>\n";
6573         }
6574         if (defined $cd{'rfc2822'}) {
6575                 print "<tr id=\"metadata_lchange\"><td>last change</td>" .
6576                       "<td>".format_timestamp_html(\%cd)."</td></tr>\n";
6577         }
6578
6579         # use per project git URL list in $projectroot/$project/cloneurl
6580         # or make project git URL from git base URL and project name
6581         my $url_tag = "URL";
6582         my @url_list = git_get_project_url_list($project);
6583         @url_list = map { "$_/$project" } @git_base_url_list unless @url_list;
6584         foreach my $git_url (@url_list) {
6585                 next unless $git_url;
6586                 print format_repo_url($url_tag, $git_url);
6587                 $url_tag = "";
6588         }
6589
6590         # Tag cloud
6591         my $show_ctags = gitweb_check_feature('ctags');
6592         if ($show_ctags) {
6593                 my $ctags = git_get_project_ctags($project);
6594                 if (%$ctags) {
6595                         # without ability to add tags, don't show if there are none
6596                         my $cloud = git_populate_project_tagcloud($ctags);
6597                         print "<tr id=\"metadata_ctags\">" .
6598                               "<td>content tags</td>" .
6599                               "<td>".git_show_project_tagcloud($cloud, 48)."</td>" .
6600                               "</tr>\n";
6601                 }
6602         }
6603
6604         print "</table>\n";
6605
6606         # If XSS prevention is on, we don't include README.html.
6607         # TODO: Allow a readme in some safe format.
6608         if (!$prevent_xss && -s "$projectroot/$project/README.html") {
6609                 print "<div class=\"title\">readme</div>\n" .
6610                       "<div class=\"readme\">\n";
6611                 insert_file("$projectroot/$project/README.html");
6612                 print "\n</div>\n"; # class="readme"
6613         }
6614
6615         # we need to request one more than 16 (0..15) to check if
6616         # those 16 are all
6617         my @commitlist = $head ? parse_commits($head, 17) : ();
6618         if (@commitlist) {
6619                 git_print_header_div('shortlog');
6620                 git_shortlog_body(\@commitlist, 0, 15, $refs,
6621                                   $#commitlist <=  15 ? undef :
6622                                   $cgi->a({-href => href(action=>"shortlog")}, "..."));
6623         }
6624
6625         if (@taglist) {
6626                 git_print_header_div('tags');
6627                 git_tags_body(\@taglist, 0, 15,
6628                               $#taglist <=  15 ? undef :
6629                               $cgi->a({-href => href(action=>"tags")}, "..."));
6630         }
6631
6632         if (@headlist) {
6633                 git_print_header_div('heads');
6634                 git_heads_body(\@headlist, $head, 0, 15,
6635                                $#headlist <= 15 ? undef :
6636                                $cgi->a({-href => href(action=>"heads")}, "..."));
6637         }
6638
6639         if (%remotedata) {
6640                 git_print_header_div('remotes');
6641                 git_remotes_body(\%remotedata, 15, $head);
6642         }
6643
6644         if (@forklist) {
6645                 git_print_header_div('forks');
6646                 git_project_list_body(\@forklist, 'age', 0, 15,
6647                                       $#forklist <= 15 ? undef :
6648                                       $cgi->a({-href => href(action=>"forks")}, "..."),
6649                                       'no_header');
6650         }
6651
6652         git_footer_html();
6653 }
6654
6655 sub git_tag {
6656         my %tag = parse_tag($hash);
6657
6658         if (! %tag) {
6659                 die_error(404, "Unknown tag object");
6660         }
6661
6662         my $head = git_get_head_hash($project);
6663         git_header_html();
6664         git_print_page_nav('','', $head,undef,$head);
6665         git_print_header_div('commit', esc_html($tag{'name'}), $hash);
6666         print "<div class=\"title_text\">\n" .
6667               "<table class=\"object_header\">\n" .
6668               "<tr>\n" .
6669               "<td>object</td>\n" .
6670               "<td>" . $cgi->a({-class => "list", -href => href(action=>$tag{'type'}, hash=>$tag{'object'})},
6671                                $tag{'object'}) . "</td>\n" .
6672               "<td class=\"link\">" . $cgi->a({-href => href(action=>$tag{'type'}, hash=>$tag{'object'})},
6673                                               $tag{'type'}) . "</td>\n" .
6674               "</tr>\n";
6675         if (defined($tag{'author'})) {
6676                 git_print_authorship_rows(\%tag, 'author');
6677         }
6678         print "</table>\n\n" .
6679               "</div>\n";
6680         print "<div class=\"page_body\">";
6681         my $comment = $tag{'comment'};
6682         foreach my $line (@$comment) {
6683                 chomp $line;
6684                 print esc_html($line, -nbsp=>1) . "<br/>\n";
6685         }
6686         print "</div>\n";
6687         git_footer_html();
6688 }
6689
6690 sub git_blame_common {
6691         my $format = shift || 'porcelain';
6692         if ($format eq 'porcelain' && $input_params{'javascript'}) {
6693                 $format = 'incremental';
6694                 $action = 'blame_incremental'; # for page title etc
6695         }
6696
6697         # permissions
6698         gitweb_check_feature('blame')
6699                 or die_error(403, "Blame view not allowed");
6700
6701         # error checking
6702         die_error(400, "No file name given") unless $file_name;
6703         $hash_base ||= git_get_head_hash($project);
6704         die_error(404, "Couldn't find base commit") unless $hash_base;
6705         my %co = parse_commit($hash_base)
6706                 or die_error(404, "Commit not found");
6707         my $ftype = "blob";
6708         if (!defined $hash) {
6709                 $hash = git_get_hash_by_path($hash_base, $file_name, "blob")
6710                         or die_error(404, "Error looking up file");
6711         } else {
6712                 $ftype = git_get_type($hash);
6713                 if ($ftype !~ "blob") {
6714                         die_error(400, "Object is not a blob");
6715                 }
6716         }
6717
6718         my $fd;
6719         if ($format eq 'incremental') {
6720                 # get file contents (as base)
6721                 open $fd, "-|", git_cmd(), 'cat-file', 'blob', $hash
6722                         or die_error(500, "Open git-cat-file failed");
6723         } elsif ($format eq 'data') {
6724                 # run git-blame --incremental
6725                 open $fd, "-|", git_cmd(), "blame", "--incremental",
6726                         $hash_base, "--", $file_name
6727                         or die_error(500, "Open git-blame --incremental failed");
6728         } else {
6729                 # run git-blame --porcelain
6730                 open $fd, "-|", git_cmd(), "blame", '-p',
6731                         $hash_base, '--', $file_name
6732                         or die_error(500, "Open git-blame --porcelain failed");
6733         }
6734         binmode $fd, ':utf8';
6735
6736         # incremental blame data returns early
6737         if ($format eq 'data') {
6738                 print $cgi->header(
6739                         -type=>"text/plain", -charset => "utf-8",
6740                         -status=> "200 OK");
6741                 local $| = 1; # output autoflush
6742                 while (my $line = <$fd>) {
6743                         print to_utf8($line);
6744                 }
6745                 close $fd
6746                         or print "ERROR $!\n";
6747
6748                 print 'END';
6749                 if (defined $t0 && gitweb_check_feature('timed')) {
6750                         print ' '.
6751                               tv_interval($t0, [ gettimeofday() ]).
6752                               ' '.$number_of_git_cmds;
6753                 }
6754                 print "\n";
6755
6756                 return;
6757         }
6758
6759         # page header
6760         git_header_html();
6761         my $formats_nav =
6762                 $cgi->a({-href => href(action=>"blob", -replay=>1)},
6763                         "blob") .
6764                 " | ";
6765         if ($format eq 'incremental') {
6766                 $formats_nav .=
6767                         $cgi->a({-href => href(action=>"blame", javascript=>0, -replay=>1)},
6768                                 "blame") . " (non-incremental)";
6769         } else {
6770                 $formats_nav .=
6771                         $cgi->a({-href => href(action=>"blame_incremental", -replay=>1)},
6772                                 "blame") . " (incremental)";
6773         }
6774         $formats_nav .=
6775                 " | " .
6776                 $cgi->a({-href => href(action=>"history", -replay=>1)},
6777                         "history") .
6778                 " | " .
6779                 $cgi->a({-href => href(action=>$action, file_name=>$file_name)},
6780                         "HEAD");
6781         git_print_page_nav('','', $hash_base,$co{'tree'},$hash_base, $formats_nav);
6782         git_print_header_div('commit', esc_html($co{'title'}), $hash_base);
6783         git_print_page_path($file_name, $ftype, $hash_base);
6784
6785         # page body
6786         if ($format eq 'incremental') {
6787                 print "<noscript>\n<div class=\"error\"><center><b>\n".
6788                       "This page requires JavaScript to run.\n Use ".
6789                       $cgi->a({-href => href(action=>'blame',javascript=>0,-replay=>1)},
6790                               'this page').
6791                       " instead.\n".
6792                       "</b></center></div>\n</noscript>\n";
6793
6794                 print qq!<div id="progress_bar" style="width: 100%; background-color: yellow"></div>\n!;
6795         }
6796
6797         print qq!<div class="page_body">\n!;
6798         print qq!<div id="progress_info">... / ...</div>\n!
6799                 if ($format eq 'incremental');
6800         print qq!<table id="blame_table" class="blame" width="100%">\n!.
6801               #qq!<col width="5.5em" /><col width="2.5em" /><col width="*" />\n!.
6802               qq!<thead>\n!.
6803               qq!<tr><th>Commit</th><th>Line</th><th>Data</th></tr>\n!.
6804               qq!</thead>\n!.
6805               qq!<tbody>\n!;
6806
6807         my @rev_color = qw(light dark);
6808         my $num_colors = scalar(@rev_color);
6809         my $current_color = 0;
6810
6811         if ($format eq 'incremental') {
6812                 my $color_class = $rev_color[$current_color];
6813
6814                 #contents of a file
6815                 my $linenr = 0;
6816         LINE:
6817                 while (my $line = <$fd>) {
6818                         chomp $line;
6819                         $linenr++;
6820
6821                         print qq!<tr id="l$linenr" class="$color_class">!.
6822                               qq!<td class="sha1"><a href=""> </a></td>!.
6823                               qq!<td class="linenr">!.
6824                               qq!<a class="linenr" href="">$linenr</a></td>!;
6825                         print qq!<td class="pre">! . esc_html($line) . "</td>\n";
6826                         print qq!</tr>\n!;
6827                 }
6828
6829         } else { # porcelain, i.e. ordinary blame
6830                 my %metainfo = (); # saves information about commits
6831
6832                 # blame data
6833         LINE:
6834                 while (my $line = <$fd>) {
6835                         chomp $line;
6836                         # the header: <SHA-1> <src lineno> <dst lineno> [<lines in group>]
6837                         # no <lines in group> for subsequent lines in group of lines
6838                         my ($full_rev, $orig_lineno, $lineno, $group_size) =
6839                            ($line =~ /^([0-9a-f]{40}) (\d+) (\d+)(?: (\d+))?$/);
6840                         if (!exists $metainfo{$full_rev}) {
6841                                 $metainfo{$full_rev} = { 'nprevious' => 0 };
6842                         }
6843                         my $meta = $metainfo{$full_rev};
6844                         my $data;
6845                         while ($data = <$fd>) {
6846                                 chomp $data;
6847                                 last if ($data =~ s/^\t//); # contents of line
6848                                 if ($data =~ /^(\S+)(?: (.*))?$/) {
6849                                         $meta->{$1} = $2 unless exists $meta->{$1};
6850                                 }
6851                                 if ($data =~ /^previous /) {
6852                                         $meta->{'nprevious'}++;
6853                                 }
6854                         }
6855                         my $short_rev = substr($full_rev, 0, 8);
6856                         my $author = $meta->{'author'};
6857                         my %date =
6858                                 parse_date($meta->{'author-time'}, $meta->{'author-tz'});
6859                         my $date = $date{'iso-tz'};
6860                         if ($group_size) {
6861                                 $current_color = ($current_color + 1) % $num_colors;
6862                         }
6863                         my $tr_class = $rev_color[$current_color];
6864                         $tr_class .= ' boundary' if (exists $meta->{'boundary'});
6865                         $tr_class .= ' no-previous' if ($meta->{'nprevious'} == 0);
6866                         $tr_class .= ' multiple-previous' if ($meta->{'nprevious'} > 1);
6867                         print "<tr id=\"l$lineno\" class=\"$tr_class\">\n";
6868                         if ($group_size) {
6869                                 print "<td class=\"sha1\"";
6870                                 print " title=\"". esc_html($author) . ", $date\"";
6871                                 print " rowspan=\"$group_size\"" if ($group_size > 1);
6872                                 print ">";
6873                                 print $cgi->a({-href => href(action=>"commit",
6874                                                              hash=>$full_rev,
6875                                                              file_name=>$file_name)},
6876                                               esc_html($short_rev));
6877                                 if ($group_size >= 2) {
6878                                         my @author_initials = ($author =~ /\b([[:upper:]])\B/g);
6879                                         if (@author_initials) {
6880                                                 print "<br />" .
6881                                                       esc_html(join('', @author_initials));
6882                                                 #           or join('.', ...)
6883                                         }
6884                                 }
6885                                 print "</td>\n";
6886                         }
6887                         # 'previous' <sha1 of parent commit> <filename at commit>
6888                         if (exists $meta->{'previous'} &&
6889                             $meta->{'previous'} =~ /^([a-fA-F0-9]{40}) (.*)$/) {
6890                                 $meta->{'parent'} = $1;
6891                                 $meta->{'file_parent'} = unquote($2);
6892                         }
6893                         my $linenr_commit =
6894                                 exists($meta->{'parent'}) ?
6895                                 $meta->{'parent'} : $full_rev;
6896                         my $linenr_filename =
6897                                 exists($meta->{'file_parent'}) ?
6898                                 $meta->{'file_parent'} : unquote($meta->{'filename'});
6899                         my $blamed = href(action => 'blame',
6900                                           file_name => $linenr_filename,
6901                                           hash_base => $linenr_commit);
6902                         print "<td class=\"linenr\">";
6903                         print $cgi->a({ -href => "$blamed#l$orig_lineno",
6904                                         -class => "linenr" },
6905                                       esc_html($lineno));
6906                         print "</td>";
6907                         print "<td class=\"pre\">" . esc_html($data) . "</td>\n";
6908                         print "</tr>\n";
6909                 } # end while
6910
6911         }
6912
6913         # footer
6914         print "</tbody>\n".
6915               "</table>\n"; # class="blame"
6916         print "</div>\n";   # class="blame_body"
6917         close $fd
6918                 or print "Reading blob failed\n";
6919
6920         git_footer_html();
6921 }
6922
6923 sub git_blame {
6924         git_blame_common();
6925 }
6926
6927 sub git_blame_incremental {
6928         git_blame_common('incremental');
6929 }
6930
6931 sub git_blame_data {
6932         git_blame_common('data');
6933 }
6934
6935 sub git_tags {
6936         my $head = git_get_head_hash($project);
6937         git_header_html();
6938         git_print_page_nav('','', $head,undef,$head,format_ref_views('tags'));
6939         git_print_header_div('summary', $project);
6940
6941         my @tagslist = git_get_tags_list();
6942         if (@tagslist) {
6943                 git_tags_body(\@tagslist);
6944         }
6945         git_footer_html();
6946 }
6947
6948 sub git_heads {
6949         my $head = git_get_head_hash($project);
6950         git_header_html();
6951         git_print_page_nav('','', $head,undef,$head,format_ref_views('heads'));
6952         git_print_header_div('summary', $project);
6953
6954         my @headslist = git_get_heads_list();
6955         if (@headslist) {
6956                 git_heads_body(\@headslist, $head);
6957         }
6958         git_footer_html();
6959 }
6960
6961 # used both for single remote view and for list of all the remotes
6962 sub git_remotes {
6963         gitweb_check_feature('remote_heads')
6964                 or die_error(403, "Remote heads view is disabled");
6965
6966         my $head = git_get_head_hash($project);
6967         my $remote = $input_params{'hash'};
6968
6969         my $remotedata = git_get_remotes_list($remote);
6970         die_error(500, "Unable to get remote information") unless defined $remotedata;
6971
6972         unless (%$remotedata) {
6973                 die_error(404, defined $remote ?
6974                         "Remote $remote not found" :
6975                         "No remotes found");
6976         }
6977
6978         git_header_html(undef, undef, -action_extra => $remote);
6979         git_print_page_nav('', '',  $head, undef, $head,
6980                 format_ref_views($remote ? '' : 'remotes'));
6981
6982         fill_remote_heads($remotedata);
6983         if (defined $remote) {
6984                 git_print_header_div('remotes', "$remote remote for $project");
6985                 git_remote_block($remote, $remotedata->{$remote}, undef, $head);
6986         } else {
6987                 git_print_header_div('summary', "$project remotes");
6988                 git_remotes_body($remotedata, undef, $head);
6989         }
6990
6991         git_footer_html();
6992 }
6993
6994 sub git_blob_plain {
6995         my $type = shift;
6996         my $expires;
6997
6998         if (!defined $hash) {
6999                 if (defined $file_name) {
7000                         my $base = $hash_base || git_get_head_hash($project);
7001                         $hash = git_get_hash_by_path($base, $file_name, "blob")
7002                                 or die_error(404, "Cannot find file");
7003                 } else {
7004                         die_error(400, "No file name defined");
7005                 }
7006         } elsif ($hash =~ m/^[0-9a-fA-F]{40}$/) {
7007                 # blobs defined by non-textual hash id's can be cached
7008                 $expires = "+1d";
7009         }
7010
7011         open my $fd, "-|", git_cmd(), "cat-file", "blob", $hash
7012                 or die_error(500, "Open git-cat-file blob '$hash' failed");
7013
7014         # content-type (can include charset)
7015         $type = blob_contenttype($fd, $file_name, $type);
7016
7017         # "save as" filename, even when no $file_name is given
7018         my $save_as = "$hash";
7019         if (defined $file_name) {
7020                 $save_as = $file_name;
7021         } elsif ($type =~ m/^text\//) {
7022                 $save_as .= '.txt';
7023         }
7024
7025         # With XSS prevention on, blobs of all types except a few known safe
7026         # ones are served with "Content-Disposition: attachment" to make sure
7027         # they don't run in our security domain.  For certain image types,
7028         # blob view writes an <img> tag referring to blob_plain view, and we
7029         # want to be sure not to break that by serving the image as an
7030         # attachment (though Firefox 3 doesn't seem to care).
7031         my $sandbox = $prevent_xss &&
7032                 $type !~ m!^(?:text/[a-z]+|image/(?:gif|png|jpeg))(?:[ ;]|$)!;
7033
7034         # serve text/* as text/plain
7035         if ($prevent_xss &&
7036             ($type =~ m!^text/[a-z]+\b(.*)$! ||
7037              ($type =~ m!^[a-z]+/[a-z]\+xml\b(.*)$! && -T $fd))) {
7038                 my $rest = $1;
7039                 $rest = defined $rest ? $rest : '';
7040                 $type = "text/plain$rest";
7041         }
7042
7043         print $cgi->header(
7044                 -type => $type,
7045                 -expires => $expires,
7046                 -content_disposition =>
7047                         ($sandbox ? 'attachment' : 'inline')
7048                         . '; filename="' . $save_as . '"');
7049         local $/ = undef;
7050         binmode STDOUT, ':raw';
7051         print <$fd>;
7052         binmode STDOUT, ':utf8'; # as set at the beginning of gitweb.cgi
7053         close $fd;
7054 }
7055
7056 sub git_blob {
7057         my $expires;
7058
7059         if (!defined $hash) {
7060                 if (defined $file_name) {
7061                         my $base = $hash_base || git_get_head_hash($project);
7062                         $hash = git_get_hash_by_path($base, $file_name, "blob")
7063                                 or die_error(404, "Cannot find file");
7064                 } else {
7065                         die_error(400, "No file name defined");
7066                 }
7067         } elsif ($hash =~ m/^[0-9a-fA-F]{40}$/) {
7068                 # blobs defined by non-textual hash id's can be cached
7069                 $expires = "+1d";
7070         }
7071
7072         my $have_blame = gitweb_check_feature('blame');
7073         open my $fd, "-|", git_cmd(), "cat-file", "blob", $hash
7074                 or die_error(500, "Couldn't cat $file_name, $hash");
7075         my $mimetype = blob_mimetype($fd, $file_name);
7076         # use 'blob_plain' (aka 'raw') view for files that cannot be displayed
7077         if ($mimetype !~ m!^(?:text/|image/(?:gif|png|jpeg)$)! && -B $fd) {
7078                 close $fd;
7079                 return git_blob_plain($mimetype);
7080         }
7081         # we can have blame only for text/* mimetype
7082         $have_blame &&= ($mimetype =~ m!^text/!);
7083
7084         my $highlight = gitweb_check_feature('highlight');
7085         my $syntax = guess_file_syntax($highlight, $file_name);
7086         $fd = run_highlighter($fd, $highlight, $syntax);
7087
7088         git_header_html(undef, $expires);
7089         my $formats_nav = '';
7090         if (defined $hash_base && (my %co = parse_commit($hash_base))) {
7091                 if (defined $file_name) {
7092                         if ($have_blame) {
7093                                 $formats_nav .=
7094                                         $cgi->a({-href => href(action=>"blame", -replay=>1)},
7095                                                 "blame") .
7096                                         " | ";
7097                         }
7098                         $formats_nav .=
7099                                 $cgi->a({-href => href(action=>"history", -replay=>1)},
7100                                         "history") .
7101                                 " | " .
7102                                 $cgi->a({-href => href(action=>"blob_plain", -replay=>1)},
7103                                         "raw") .
7104                                 " | " .
7105                                 $cgi->a({-href => href(action=>"blob",
7106                                                        hash_base=>"HEAD", file_name=>$file_name)},
7107                                         "HEAD");
7108                 } else {
7109                         $formats_nav .=
7110                                 $cgi->a({-href => href(action=>"blob_plain", -replay=>1)},
7111                                         "raw");
7112                 }
7113                 git_print_page_nav('','', $hash_base,$co{'tree'},$hash_base, $formats_nav);
7114                 git_print_header_div('commit', esc_html($co{'title'}), $hash_base);
7115         } else {
7116                 print "<div class=\"page_nav\">\n" .
7117                       "<br/><br/></div>\n" .
7118                       "<div class=\"title\">".esc_html($hash)."</div>\n";
7119         }
7120         git_print_page_path($file_name, "blob", $hash_base);
7121         print "<div class=\"page_body\">\n";
7122         if ($mimetype =~ m!^image/!) {
7123                 print qq!<img class="blob" type="!.esc_attr($mimetype).qq!"!;
7124                 if ($file_name) {
7125                         print qq! alt="!.esc_attr($file_name).qq!" title="!.esc_attr($file_name).qq!"!;
7126                 }
7127                 print qq! src="! .
7128                       href(action=>"blob_plain", hash=>$hash,
7129                            hash_base=>$hash_base, file_name=>$file_name) .
7130                       qq!" />\n!;
7131         } else {
7132                 my $nr;
7133                 while (my $line = <$fd>) {
7134                         chomp $line;
7135                         $nr++;
7136                         $line = untabify($line);
7137                         printf qq!<div class="pre"><a id="l%i" href="%s#l%i" class="linenr">%4i</a> %s</div>\n!,
7138                                $nr, esc_attr(href(-replay => 1)), $nr, $nr,
7139                                $highlight ? sanitize($line) : esc_html($line, -nbsp=>1);
7140                 }
7141         }
7142         close $fd
7143                 or print "Reading blob failed.\n";
7144         print "</div>";
7145         git_footer_html();
7146 }
7147
7148 sub git_tree {
7149         if (!defined $hash_base) {
7150                 $hash_base = "HEAD";
7151         }
7152         if (!defined $hash) {
7153                 if (defined $file_name) {
7154                         $hash = git_get_hash_by_path($hash_base, $file_name, "tree");
7155                 } else {
7156                         $hash = $hash_base;
7157                 }
7158         }
7159         die_error(404, "No such tree") unless defined($hash);
7160
7161         my $show_sizes = gitweb_check_feature('show-sizes');
7162         my $have_blame = gitweb_check_feature('blame');
7163
7164         my @entries = ();
7165         {
7166                 local $/ = "\0";
7167                 open my $fd, "-|", git_cmd(), "ls-tree", '-z',
7168                         ($show_sizes ? '-l' : ()), @extra_options, $hash
7169                         or die_error(500, "Open git-ls-tree failed");
7170                 @entries = map { chomp; $_ } <$fd>;
7171                 close $fd
7172                         or die_error(404, "Reading tree failed");
7173         }
7174
7175         my $refs = git_get_references();
7176         my $ref = format_ref_marker($refs, $hash_base);
7177         git_header_html();
7178         my $basedir = '';
7179         if (defined $hash_base && (my %co = parse_commit($hash_base))) {
7180                 my @views_nav = ();
7181                 if (defined $file_name) {
7182                         push @views_nav,
7183                                 $cgi->a({-href => href(action=>"history", -replay=>1)},
7184                                         "history"),
7185                                 $cgi->a({-href => href(action=>"tree",
7186                                                        hash_base=>"HEAD", file_name=>$file_name)},
7187                                         "HEAD"),
7188                 }
7189                 my $snapshot_links = format_snapshot_links($hash);
7190                 if (defined $snapshot_links) {
7191                         # FIXME: Should be available when we have no hash base as well.
7192                         push @views_nav, $snapshot_links;
7193                 }
7194                 git_print_page_nav('tree','', $hash_base, undef, undef,
7195                                    join(' | ', @views_nav));
7196                 git_print_header_div('commit', esc_html($co{'title'}) . $ref, $hash_base);
7197         } else {
7198                 undef $hash_base;
7199                 print "<div class=\"page_nav\">\n";
7200                 print "<br/><br/></div>\n";
7201                 print "<div class=\"title\">".esc_html($hash)."</div>\n";
7202         }
7203         if (defined $file_name) {
7204                 $basedir = $file_name;
7205                 if ($basedir ne '' && substr($basedir, -1) ne '/') {
7206                         $basedir .= '/';
7207                 }
7208                 git_print_page_path($file_name, 'tree', $hash_base);
7209         }
7210         print "<div class=\"page_body\">\n";
7211         print "<table class=\"tree\">\n";
7212         my $alternate = 1;
7213         # '..' (top directory) link if possible
7214         if (defined $hash_base &&
7215             defined $file_name && $file_name =~ m![^/]+$!) {
7216                 if ($alternate) {
7217                         print "<tr class=\"dark\">\n";
7218                 } else {
7219                         print "<tr class=\"light\">\n";
7220                 }
7221                 $alternate ^= 1;
7222
7223                 my $up = $file_name;
7224                 $up =~ s!/?[^/]+$!!;
7225                 undef $up unless $up;
7226                 # based on git_print_tree_entry
7227                 print '<td class="mode">' . mode_str('040000') . "</td>\n";
7228                 print '<td class="size">&nbsp;</td>'."\n" if $show_sizes;
7229                 print '<td class="list">';
7230                 print $cgi->a({-href => href(action=>"tree",
7231                                              hash_base=>$hash_base,
7232                                              file_name=>$up)},
7233                               "..");
7234                 print "</td>\n";
7235                 print "<td class=\"link\"></td>\n";
7236
7237                 print "</tr>\n";
7238         }
7239         foreach my $line (@entries) {
7240                 my %t = parse_ls_tree_line($line, -z => 1, -l => $show_sizes);
7241
7242                 if ($alternate) {
7243                         print "<tr class=\"dark\">\n";
7244                 } else {
7245                         print "<tr class=\"light\">\n";
7246                 }
7247                 $alternate ^= 1;
7248
7249                 git_print_tree_entry(\%t, $basedir, $hash_base, $have_blame);
7250
7251                 print "</tr>\n";
7252         }
7253         print "</table>\n" .
7254               "</div>";
7255         git_footer_html();
7256 }
7257
7258 sub sanitize_for_filename {
7259     my $name = shift;
7260
7261     $name =~ s!/!-!g;
7262     $name =~ s/[^[:alnum:]_.-]//g;
7263
7264     return $name;
7265 }
7266
7267 sub snapshot_name {
7268         my ($project, $hash) = @_;
7269
7270         # path/to/project.git  -> project
7271         # path/to/project/.git -> project
7272         my $name = to_utf8($project);
7273         $name =~ s,([^/])/*\.git$,$1,;
7274         $name = sanitize_for_filename(basename($name));
7275
7276         my $ver = $hash;
7277         if ($hash =~ /^[0-9a-fA-F]+$/) {
7278                 # shorten SHA-1 hash
7279                 my $full_hash = git_get_full_hash($project, $hash);
7280                 if ($full_hash =~ /^$hash/ && length($hash) > 7) {
7281                         $ver = git_get_short_hash($project, $hash);
7282                 }
7283         } elsif ($hash =~ m!^refs/tags/(.*)$!) {
7284                 # tags don't need shortened SHA-1 hash
7285                 $ver = $1;
7286         } else {
7287                 # branches and other need shortened SHA-1 hash
7288                 my $strip_refs = join '|', map { quotemeta } get_branch_refs();
7289                 if ($hash =~ m!^refs/($strip_refs|remotes)/(.*)$!) {
7290                         my $ref_dir = (defined $1) ? $1 : '';
7291                         $ver = $2;
7292
7293                         $ref_dir = sanitize_for_filename($ref_dir);
7294                         # for refs neither in heads nor remotes we want to
7295                         # add a ref dir to archive name
7296                         if ($ref_dir ne '' and $ref_dir ne 'heads' and $ref_dir ne 'remotes') {
7297                                 $ver = $ref_dir . '-' . $ver;
7298                         }
7299                 }
7300                 $ver .= '-' . git_get_short_hash($project, $hash);
7301         }
7302         # special case of sanitization for filename - we change
7303         # slashes to dots instead of dashes
7304         # in case of hierarchical branch names
7305         $ver =~ s!/!.!g;
7306         $ver =~ s/[^[:alnum:]_.-]//g;
7307
7308         # name = project-version_string
7309         $name = "$name-$ver";
7310
7311         return wantarray ? ($name, $name) : $name;
7312 }
7313
7314 sub exit_if_unmodified_since {
7315         my ($latest_epoch) = @_;
7316         our $cgi;
7317
7318         my $if_modified = $cgi->http('IF_MODIFIED_SINCE');
7319         if (defined $if_modified) {
7320                 my $since;
7321                 if (eval { require HTTP::Date; 1; }) {
7322                         $since = HTTP::Date::str2time($if_modified);
7323                 } elsif (eval { require Time::ParseDate; 1; }) {
7324                         $since = Time::ParseDate::parsedate($if_modified, GMT => 1);
7325                 }
7326                 if (defined $since && $latest_epoch <= $since) {
7327                         my %latest_date = parse_date($latest_epoch);
7328                         print $cgi->header(
7329                                 -last_modified => $latest_date{'rfc2822'},
7330                                 -status => '304 Not Modified');
7331                         goto DONE_GITWEB;
7332                 }
7333         }
7334 }
7335
7336 sub git_snapshot {
7337         my $format = $input_params{'snapshot_format'};
7338         if (!@snapshot_fmts) {
7339                 die_error(403, "Snapshots not allowed");
7340         }
7341         # default to first supported snapshot format
7342         $format ||= $snapshot_fmts[0];
7343         if ($format !~ m/^[a-z0-9]+$/) {
7344                 die_error(400, "Invalid snapshot format parameter");
7345         } elsif (!exists($known_snapshot_formats{$format})) {
7346                 die_error(400, "Unknown snapshot format");
7347         } elsif ($known_snapshot_formats{$format}{'disabled'}) {
7348                 die_error(403, "Snapshot format not allowed");
7349         } elsif (!grep($_ eq $format, @snapshot_fmts)) {
7350                 die_error(403, "Unsupported snapshot format");
7351         }
7352
7353         my $type = git_get_type("$hash^{}");
7354         if (!$type) {
7355                 die_error(404, 'Object does not exist');
7356         }  elsif ($type eq 'blob') {
7357                 die_error(400, 'Object is not a tree-ish');
7358         }
7359
7360         my ($name, $prefix) = snapshot_name($project, $hash);
7361         my $filename = "$name$known_snapshot_formats{$format}{'suffix'}";
7362
7363         my %co = parse_commit($hash);
7364         exit_if_unmodified_since($co{'committer_epoch'}) if %co;
7365
7366         my $cmd = quote_command(
7367                 git_cmd(), 'archive',
7368                 "--format=$known_snapshot_formats{$format}{'format'}",
7369                 "--prefix=$prefix/", $hash);
7370         if (exists $known_snapshot_formats{$format}{'compressor'}) {
7371                 $cmd .= ' | ' . quote_command(@{$known_snapshot_formats{$format}{'compressor'}});
7372         }
7373
7374         $filename =~ s/(["\\])/\\$1/g;
7375         my %latest_date;
7376         if (%co) {
7377                 %latest_date = parse_date($co{'committer_epoch'}, $co{'committer_tz'});
7378         }
7379
7380         print $cgi->header(
7381                 -type => $known_snapshot_formats{$format}{'type'},
7382                 -content_disposition => 'inline; filename="' . $filename . '"',
7383                 %co ? (-last_modified => $latest_date{'rfc2822'}) : (),
7384                 -status => '200 OK');
7385
7386         open my $fd, "-|", $cmd
7387                 or die_error(500, "Execute git-archive failed");
7388         binmode STDOUT, ':raw';
7389         print <$fd>;
7390         binmode STDOUT, ':utf8'; # as set at the beginning of gitweb.cgi
7391         close $fd;
7392 }
7393
7394 sub git_log_generic {
7395         my ($fmt_name, $body_subr, $base, $parent, $file_name, $file_hash) = @_;
7396
7397         my $head = git_get_head_hash($project);
7398         if (!defined $base) {
7399                 $base = $head;
7400         }
7401         if (!defined $page) {
7402                 $page = 0;
7403         }
7404         my $refs = git_get_references();
7405
7406         my $commit_hash = $base;
7407         if (defined $parent) {
7408                 $commit_hash = "$parent..$base";
7409         }
7410         my @commitlist =
7411                 parse_commits($commit_hash, 101, (100 * $page),
7412                               defined $file_name ? ($file_name, "--full-history") : ());
7413
7414         my $ftype;
7415         if (!defined $file_hash && defined $file_name) {
7416                 # some commits could have deleted file in question,
7417                 # and not have it in tree, but one of them has to have it
7418                 for (my $i = 0; $i < @commitlist; $i++) {
7419                         $file_hash = git_get_hash_by_path($commitlist[$i]{'id'}, $file_name);
7420                         last if defined $file_hash;
7421                 }
7422         }
7423         if (defined $file_hash) {
7424                 $ftype = git_get_type($file_hash);
7425         }
7426         if (defined $file_name && !defined $ftype) {
7427                 die_error(500, "Unknown type of object");
7428         }
7429         my %co;
7430         if (defined $file_name) {
7431                 %co = parse_commit($base)
7432                         or die_error(404, "Unknown commit object");
7433         }
7434
7435
7436         my $paging_nav = format_paging_nav($fmt_name, $page, $#commitlist >= 100);
7437         my $next_link = '';
7438         if ($#commitlist >= 100) {
7439                 $next_link =
7440                         $cgi->a({-href => href(-replay=>1, page=>$page+1),
7441                                  -accesskey => "n", -title => "Alt-n"}, "next");
7442         }
7443         my $patch_max = gitweb_get_feature('patches');
7444         if ($patch_max && !defined $file_name) {
7445                 if ($patch_max < 0 || @commitlist <= $patch_max) {
7446                         $paging_nav .= " &sdot; " .
7447                                 $cgi->a({-href => href(action=>"patches", -replay=>1)},
7448                                         "patches");
7449                 }
7450         }
7451
7452         git_header_html();
7453         git_print_page_nav($fmt_name,'', $hash,$hash,$hash, $paging_nav);
7454         if (defined $file_name) {
7455                 git_print_header_div('commit', esc_html($co{'title'}), $base);
7456         } else {
7457                 git_print_header_div('summary', $project)
7458         }
7459         git_print_page_path($file_name, $ftype, $hash_base)
7460                 if (defined $file_name);
7461
7462         $body_subr->(\@commitlist, 0, 99, $refs, $next_link,
7463                      $file_name, $file_hash, $ftype);
7464
7465         git_footer_html();
7466 }
7467
7468 sub git_log {
7469         git_log_generic('log', \&git_log_body,
7470                         $hash, $hash_parent);
7471 }
7472
7473 sub git_commit {
7474         $hash ||= $hash_base || "HEAD";
7475         my %co = parse_commit($hash)
7476             or die_error(404, "Unknown commit object");
7477
7478         my $parent  = $co{'parent'};
7479         my $parents = $co{'parents'}; # listref
7480
7481         # we need to prepare $formats_nav before any parameter munging
7482         my $formats_nav;
7483         if (!defined $parent) {
7484                 # --root commitdiff
7485                 $formats_nav .= '(initial)';
7486         } elsif (@$parents == 1) {
7487                 # single parent commit
7488                 $formats_nav .=
7489                         '(parent: ' .
7490                         $cgi->a({-href => href(action=>"commit",
7491                                                hash=>$parent)},
7492                                 esc_html(substr($parent, 0, 7))) .
7493                         ')';
7494         } else {
7495                 # merge commit
7496                 $formats_nav .=
7497                         '(merge: ' .
7498                         join(' ', map {
7499                                 $cgi->a({-href => href(action=>"commit",
7500                                                        hash=>$_)},
7501                                         esc_html(substr($_, 0, 7)));
7502                         } @$parents ) .
7503                         ')';
7504         }
7505         if (gitweb_check_feature('patches') && @$parents <= 1) {
7506                 $formats_nav .= " | " .
7507                         $cgi->a({-href => href(action=>"patch", -replay=>1)},
7508                                 "patch");
7509         }
7510
7511         if (!defined $parent) {
7512                 $parent = "--root";
7513         }
7514         my @difftree;
7515         open my $fd, "-|", git_cmd(), "diff-tree", '-r', "--no-commit-id",
7516                 @diff_opts,
7517                 (@$parents <= 1 ? $parent : '-c'),
7518                 $hash, "--"
7519                 or die_error(500, "Open git-diff-tree failed");
7520         @difftree = map { chomp; $_ } <$fd>;
7521         close $fd or die_error(404, "Reading git-diff-tree failed");
7522
7523         # non-textual hash id's can be cached
7524         my $expires;
7525         if ($hash =~ m/^[0-9a-fA-F]{40}$/) {
7526                 $expires = "+1d";
7527         }
7528         my $refs = git_get_references();
7529         my $ref = format_ref_marker($refs, $co{'id'});
7530
7531         git_header_html(undef, $expires);
7532         git_print_page_nav('commit', '',
7533                            $hash, $co{'tree'}, $hash,
7534                            $formats_nav);
7535
7536         if (defined $co{'parent'}) {
7537                 git_print_header_div('commitdiff', esc_html($co{'title'}) . $ref, $hash);
7538         } else {
7539                 git_print_header_div('tree', esc_html($co{'title'}) . $ref, $co{'tree'}, $hash);
7540         }
7541         print "<div class=\"title_text\">\n" .
7542               "<table class=\"object_header\">\n";
7543         git_print_authorship_rows(\%co);
7544         print "<tr><td>commit</td><td class=\"sha1\">$co{'id'}</td></tr>\n";
7545         print "<tr>" .
7546               "<td>tree</td>" .
7547               "<td class=\"sha1\">" .
7548               $cgi->a({-href => href(action=>"tree", hash=>$co{'tree'}, hash_base=>$hash),
7549                        class => "list"}, $co{'tree'}) .
7550               "</td>" .
7551               "<td class=\"link\">" .
7552               $cgi->a({-href => href(action=>"tree", hash=>$co{'tree'}, hash_base=>$hash)},
7553                       "tree");
7554         my $snapshot_links = format_snapshot_links($hash);
7555         if (defined $snapshot_links) {
7556                 print " | " . $snapshot_links;
7557         }
7558         print "</td>" .
7559               "</tr>\n";
7560
7561         foreach my $par (@$parents) {
7562                 print "<tr>" .
7563                       "<td>parent</td>" .
7564                       "<td class=\"sha1\">" .
7565                       $cgi->a({-href => href(action=>"commit", hash=>$par),
7566                                class => "list"}, $par) .
7567                       "</td>" .
7568                       "<td class=\"link\">" .
7569                       $cgi->a({-href => href(action=>"commit", hash=>$par)}, "commit") .
7570                       " | " .
7571                       $cgi->a({-href => href(action=>"commitdiff", hash=>$hash, hash_parent=>$par)}, "diff") .
7572                       "</td>" .
7573                       "</tr>\n";
7574         }
7575         print "</table>".
7576               "</div>\n";
7577
7578         print "<div class=\"page_body\">\n";
7579         git_print_log($co{'comment'});
7580         print "</div>\n";
7581
7582         git_difftree_body(\@difftree, $hash, @$parents);
7583
7584         git_footer_html();
7585 }
7586
7587 sub git_object {
7588         # object is defined by:
7589         # - hash or hash_base alone
7590         # - hash_base and file_name
7591         my $type;
7592
7593         # - hash or hash_base alone
7594         if ($hash || ($hash_base && !defined $file_name)) {
7595                 my $object_id = $hash || $hash_base;
7596
7597                 open my $fd, "-|", quote_command(
7598                         git_cmd(), 'cat-file', '-t', $object_id) . ' 2> /dev/null'
7599                         or die_error(404, "Object does not exist");
7600                 $type = <$fd>;
7601                 defined $type && chomp $type;
7602                 close $fd
7603                         or die_error(404, "Object does not exist");
7604
7605         # - hash_base and file_name
7606         } elsif ($hash_base && defined $file_name) {
7607                 $file_name =~ s,/+$,,;
7608
7609                 system(git_cmd(), "cat-file", '-e', $hash_base) == 0
7610                         or die_error(404, "Base object does not exist");
7611
7612                 # here errors should not happen
7613                 open my $fd, "-|", git_cmd(), "ls-tree", $hash_base, "--", $file_name
7614                         or die_error(500, "Open git-ls-tree failed");
7615                 my $line = <$fd>;
7616                 close $fd;
7617
7618                 #'100644 blob 0fa3f3a66fb6a137f6ec2c19351ed4d807070ffa  panic.c'
7619                 unless ($line && $line =~ m/^([0-9]+) (.+) ([0-9a-fA-F]{40})\t/) {
7620                         die_error(404, "File or directory for given base does not exist");
7621                 }
7622                 $type = $2;
7623                 $hash = $3;
7624         } else {
7625                 die_error(400, "Not enough information to find object");
7626         }
7627
7628         print $cgi->redirect(-uri => href(action=>$type, -full=>1,
7629                                           hash=>$hash, hash_base=>$hash_base,
7630                                           file_name=>$file_name),
7631                              -status => '302 Found');
7632 }
7633
7634 sub git_blobdiff {
7635         my $format = shift || 'html';
7636         my $diff_style = $input_params{'diff_style'} || 'inline';
7637
7638         my $fd;
7639         my @difftree;
7640         my %diffinfo;
7641         my $expires;
7642
7643         # preparing $fd and %diffinfo for git_patchset_body
7644         # new style URI
7645         if (defined $hash_base && defined $hash_parent_base) {
7646                 if (defined $file_name) {
7647                         # read raw output
7648                         open $fd, "-|", git_cmd(), "diff-tree", '-r', @diff_opts,
7649                                 $hash_parent_base, $hash_base,
7650                                 "--", (defined $file_parent ? $file_parent : ()), $file_name
7651                                 or die_error(500, "Open git-diff-tree failed");
7652                         @difftree = map { chomp; $_ } <$fd>;
7653                         close $fd
7654                                 or die_error(404, "Reading git-diff-tree failed");
7655                         @difftree
7656                                 or die_error(404, "Blob diff not found");
7657
7658                 } elsif (defined $hash &&
7659                          $hash =~ /[0-9a-fA-F]{40}/) {
7660                         # try to find filename from $hash
7661
7662                         # read filtered raw output
7663                         open $fd, "-|", git_cmd(), "diff-tree", '-r', @diff_opts,
7664                                 $hash_parent_base, $hash_base, "--"
7665                                 or die_error(500, "Open git-diff-tree failed");
7666                         @difftree =
7667                                 # ':100644 100644 03b21826... 3b93d5e7... M     ls-files.c'
7668                                 # $hash == to_id
7669                                 grep { /^:[0-7]{6} [0-7]{6} [0-9a-fA-F]{40} $hash/ }
7670                                 map { chomp; $_ } <$fd>;
7671                         close $fd
7672                                 or die_error(404, "Reading git-diff-tree failed");
7673                         @difftree
7674                                 or die_error(404, "Blob diff not found");
7675
7676                 } else {
7677                         die_error(400, "Missing one of the blob diff parameters");
7678                 }
7679
7680                 if (@difftree > 1) {
7681                         die_error(400, "Ambiguous blob diff specification");
7682                 }
7683
7684                 %diffinfo = parse_difftree_raw_line($difftree[0]);
7685                 $file_parent ||= $diffinfo{'from_file'} || $file_name;
7686                 $file_name   ||= $diffinfo{'to_file'};
7687
7688                 $hash_parent ||= $diffinfo{'from_id'};
7689                 $hash        ||= $diffinfo{'to_id'};
7690
7691                 # non-textual hash id's can be cached
7692                 if ($hash_base =~ m/^[0-9a-fA-F]{40}$/ &&
7693                     $hash_parent_base =~ m/^[0-9a-fA-F]{40}$/) {
7694                         $expires = '+1d';
7695                 }
7696
7697                 # open patch output
7698                 open $fd, "-|", git_cmd(), "diff-tree", '-r', @diff_opts,
7699                         '-p', ($format eq 'html' ? "--full-index" : ()),
7700                         $hash_parent_base, $hash_base,
7701                         "--", (defined $file_parent ? $file_parent : ()), $file_name
7702                         or die_error(500, "Open git-diff-tree failed");
7703         }
7704
7705         # old/legacy style URI -- not generated anymore since 1.4.3.
7706         if (!%diffinfo) {
7707                 die_error('404 Not Found', "Missing one of the blob diff parameters")
7708         }
7709
7710         # header
7711         if ($format eq 'html') {
7712                 my $formats_nav =
7713                         $cgi->a({-href => href(action=>"blobdiff_plain", -replay=>1)},
7714                                 "raw");
7715                 $formats_nav .= diff_style_nav($diff_style);
7716                 git_header_html(undef, $expires);
7717                 if (defined $hash_base && (my %co = parse_commit($hash_base))) {
7718                         git_print_page_nav('','', $hash_base,$co{'tree'},$hash_base, $formats_nav);
7719                         git_print_header_div('commit', esc_html($co{'title'}), $hash_base);
7720                 } else {
7721                         print "<div class=\"page_nav\"><br/>$formats_nav<br/></div>\n";
7722                         print "<div class=\"title\">".esc_html("$hash vs $hash_parent")."</div>\n";
7723                 }
7724                 if (defined $file_name) {
7725                         git_print_page_path($file_name, "blob", $hash_base);
7726                 } else {
7727                         print "<div class=\"page_path\"></div>\n";
7728                 }
7729
7730         } elsif ($format eq 'plain') {
7731                 print $cgi->header(
7732                         -type => 'text/plain',
7733                         -charset => 'utf-8',
7734                         -expires => $expires,
7735                         -content_disposition => 'inline; filename="' . "$file_name" . '.patch"');
7736
7737                 print "X-Git-Url: " . $cgi->self_url() . "\n\n";
7738
7739         } else {
7740                 die_error(400, "Unknown blobdiff format");
7741         }
7742
7743         # patch
7744         if ($format eq 'html') {
7745                 print "<div class=\"page_body\">\n";
7746
7747                 git_patchset_body($fd, $diff_style,
7748                                   [ \%diffinfo ], $hash_base, $hash_parent_base);
7749                 close $fd;
7750
7751                 print "</div>\n"; # class="page_body"
7752                 git_footer_html();
7753
7754         } else {
7755                 while (my $line = <$fd>) {
7756                         $line =~ s!a/($hash|$hash_parent)!'a/'.esc_path($diffinfo{'from_file'})!eg;
7757                         $line =~ s!b/($hash|$hash_parent)!'b/'.esc_path($diffinfo{'to_file'})!eg;
7758
7759                         print $line;
7760
7761                         last if $line =~ m!^\+\+\+!;
7762                 }
7763                 local $/ = undef;
7764                 print <$fd>;
7765                 close $fd;
7766         }
7767 }
7768
7769 sub git_blobdiff_plain {
7770         git_blobdiff('plain');
7771 }
7772
7773 # assumes that it is added as later part of already existing navigation,
7774 # so it returns "| foo | bar" rather than just "foo | bar"
7775 sub diff_style_nav {
7776         my ($diff_style, $is_combined) = @_;
7777         $diff_style ||= 'inline';
7778
7779         return "" if ($is_combined);
7780
7781         my @styles = (inline => 'inline', 'sidebyside' => 'side by side');
7782         my %styles = @styles;
7783         @styles =
7784                 @styles[ map { $_ * 2 } 0..$#styles/2 ];
7785
7786         return join '',
7787                 map { " | ".$_ }
7788                 map {
7789                         $_ eq $diff_style ? $styles{$_} :
7790                         $cgi->a({-href => href(-replay=>1, diff_style => $_)}, $styles{$_})
7791                 } @styles;
7792 }
7793
7794 sub git_commitdiff {
7795         my %params = @_;
7796         my $format = $params{-format} || 'html';
7797         my $diff_style = $input_params{'diff_style'} || 'inline';
7798
7799         my ($patch_max) = gitweb_get_feature('patches');
7800         if ($format eq 'patch') {
7801                 die_error(403, "Patch view not allowed") unless $patch_max;
7802         }
7803
7804         $hash ||= $hash_base || "HEAD";
7805         my %co = parse_commit($hash)
7806             or die_error(404, "Unknown commit object");
7807
7808         # choose format for commitdiff for merge
7809         if (! defined $hash_parent && @{$co{'parents'}} > 1) {
7810                 $hash_parent = '--cc';
7811         }
7812         # we need to prepare $formats_nav before almost any parameter munging
7813         my $formats_nav;
7814         if ($format eq 'html') {
7815                 $formats_nav =
7816                         $cgi->a({-href => href(action=>"commitdiff_plain", -replay=>1)},
7817                                 "raw");
7818                 if ($patch_max && @{$co{'parents'}} <= 1) {
7819                         $formats_nav .= " | " .
7820                                 $cgi->a({-href => href(action=>"patch", -replay=>1)},
7821                                         "patch");
7822                 }
7823                 $formats_nav .= diff_style_nav($diff_style, @{$co{'parents'}} > 1);
7824
7825                 if (defined $hash_parent &&
7826                     $hash_parent ne '-c' && $hash_parent ne '--cc') {
7827                         # commitdiff with two commits given
7828                         my $hash_parent_short = $hash_parent;
7829                         if ($hash_parent =~ m/^[0-9a-fA-F]{40}$/) {
7830                                 $hash_parent_short = substr($hash_parent, 0, 7);
7831                         }
7832                         $formats_nav .=
7833                                 ' (from';
7834                         for (my $i = 0; $i < @{$co{'parents'}}; $i++) {
7835                                 if ($co{'parents'}[$i] eq $hash_parent) {
7836                                         $formats_nav .= ' parent ' . ($i+1);
7837                                         last;
7838                                 }
7839                         }
7840                         $formats_nav .= ': ' .
7841                                 $cgi->a({-href => href(-replay=>1,
7842                                                        hash=>$hash_parent, hash_base=>undef)},
7843                                         esc_html($hash_parent_short)) .
7844                                 ')';
7845                 } elsif (!$co{'parent'}) {
7846                         # --root commitdiff
7847                         $formats_nav .= ' (initial)';
7848                 } elsif (scalar @{$co{'parents'}} == 1) {
7849                         # single parent commit
7850                         $formats_nav .=
7851                                 ' (parent: ' .
7852                                 $cgi->a({-href => href(-replay=>1,
7853                                                        hash=>$co{'parent'}, hash_base=>undef)},
7854                                         esc_html(substr($co{'parent'}, 0, 7))) .
7855                                 ')';
7856                 } else {
7857                         # merge commit
7858                         if ($hash_parent eq '--cc') {
7859                                 $formats_nav .= ' | ' .
7860                                         $cgi->a({-href => href(-replay=>1,
7861                                                                hash=>$hash, hash_parent=>'-c')},
7862                                                 'combined');
7863                         } else { # $hash_parent eq '-c'
7864                                 $formats_nav .= ' | ' .
7865                                         $cgi->a({-href => href(-replay=>1,
7866                                                                hash=>$hash, hash_parent=>'--cc')},
7867                                                 'compact');
7868                         }
7869                         $formats_nav .=
7870                                 ' (merge: ' .
7871                                 join(' ', map {
7872                                         $cgi->a({-href => href(-replay=>1,
7873                                                                hash=>$_, hash_base=>undef)},
7874                                                 esc_html(substr($_, 0, 7)));
7875                                 } @{$co{'parents'}} ) .
7876                                 ')';
7877                 }
7878         }
7879
7880         my $hash_parent_param = $hash_parent;
7881         if (!defined $hash_parent_param) {
7882                 # --cc for multiple parents, --root for parentless
7883                 $hash_parent_param =
7884                         @{$co{'parents'}} > 1 ? '--cc' : $co{'parent'} || '--root';
7885         }
7886
7887         # read commitdiff
7888         my $fd;
7889         my @difftree;
7890         if ($format eq 'html') {
7891                 open $fd, "-|", git_cmd(), "diff-tree", '-r', @diff_opts,
7892                         "--no-commit-id", "--patch-with-raw", "--full-index",
7893                         $hash_parent_param, $hash, "--"
7894                         or die_error(500, "Open git-diff-tree failed");
7895
7896                 while (my $line = <$fd>) {
7897                         chomp $line;
7898                         # empty line ends raw part of diff-tree output
7899                         last unless $line;
7900                         push @difftree, scalar parse_difftree_raw_line($line);
7901                 }
7902
7903         } elsif ($format eq 'plain') {
7904                 open $fd, "-|", git_cmd(), "diff-tree", '-r', @diff_opts,
7905                         '-p', $hash_parent_param, $hash, "--"
7906                         or die_error(500, "Open git-diff-tree failed");
7907         } elsif ($format eq 'patch') {
7908                 # For commit ranges, we limit the output to the number of
7909                 # patches specified in the 'patches' feature.
7910                 # For single commits, we limit the output to a single patch,
7911                 # diverging from the git-format-patch default.
7912                 my @commit_spec = ();
7913                 if ($hash_parent) {
7914                         if ($patch_max > 0) {
7915                                 push @commit_spec, "-$patch_max";
7916                         }
7917                         push @commit_spec, '-n', "$hash_parent..$hash";
7918                 } else {
7919                         if ($params{-single}) {
7920                                 push @commit_spec, '-1';
7921                         } else {
7922                                 if ($patch_max > 0) {
7923                                         push @commit_spec, "-$patch_max";
7924                                 }
7925                                 push @commit_spec, "-n";
7926                         }
7927                         push @commit_spec, '--root', $hash;
7928                 }
7929                 open $fd, "-|", git_cmd(), "format-patch", @diff_opts,
7930                         '--encoding=utf8', '--stdout', @commit_spec
7931                         or die_error(500, "Open git-format-patch failed");
7932         } else {
7933                 die_error(400, "Unknown commitdiff format");
7934         }
7935
7936         # non-textual hash id's can be cached
7937         my $expires;
7938         if ($hash =~ m/^[0-9a-fA-F]{40}$/) {
7939                 $expires = "+1d";
7940         }
7941
7942         # write commit message
7943         if ($format eq 'html') {
7944                 my $refs = git_get_references();
7945                 my $ref = format_ref_marker($refs, $co{'id'});
7946
7947                 git_header_html(undef, $expires);
7948                 git_print_page_nav('commitdiff','', $hash,$co{'tree'},$hash, $formats_nav);
7949                 git_print_header_div('commit', esc_html($co{'title'}) . $ref, $hash);
7950                 print "<div class=\"title_text\">\n" .
7951                       "<table class=\"object_header\">\n";
7952                 git_print_authorship_rows(\%co);
7953                 print "</table>".
7954                       "</div>\n";
7955                 print "<div class=\"page_body\">\n";
7956                 if (@{$co{'comment'}} > 1) {
7957                         print "<div class=\"log\">\n";
7958                         git_print_log($co{'comment'}, -final_empty_line=> 1, -remove_title => 1);
7959                         print "</div>\n"; # class="log"
7960                 }
7961
7962         } elsif ($format eq 'plain') {
7963                 my $refs = git_get_references("tags");
7964                 my $tagname = git_get_rev_name_tags($hash);
7965                 my $filename = basename($project) . "-$hash.patch";
7966
7967                 print $cgi->header(
7968                         -type => 'text/plain',
7969                         -charset => 'utf-8',
7970                         -expires => $expires,
7971                         -content_disposition => 'inline; filename="' . "$filename" . '"');
7972                 my %ad = parse_date($co{'author_epoch'}, $co{'author_tz'});
7973                 print "From: " . to_utf8($co{'author'}) . "\n";
7974                 print "Date: $ad{'rfc2822'} ($ad{'tz_local'})\n";
7975                 print "Subject: " . to_utf8($co{'title'}) . "\n";
7976
7977                 print "X-Git-Tag: $tagname\n" if $tagname;
7978                 print "X-Git-Url: " . $cgi->self_url() . "\n\n";
7979
7980                 foreach my $line (@{$co{'comment'}}) {
7981                         print to_utf8($line) . "\n";
7982                 }
7983                 print "---\n\n";
7984         } elsif ($format eq 'patch') {
7985                 my $filename = basename($project) . "-$hash.patch";
7986
7987                 print $cgi->header(
7988                         -type => 'text/plain',
7989                         -charset => 'utf-8',
7990                         -expires => $expires,
7991                         -content_disposition => 'inline; filename="' . "$filename" . '"');
7992         }
7993
7994         # write patch
7995         if ($format eq 'html') {
7996                 my $use_parents = !defined $hash_parent ||
7997                         $hash_parent eq '-c' || $hash_parent eq '--cc';
7998                 git_difftree_body(\@difftree, $hash,
7999                                   $use_parents ? @{$co{'parents'}} : $hash_parent);
8000                 print "<br/>\n";
8001
8002                 git_patchset_body($fd, $diff_style,
8003                                   \@difftree, $hash,
8004                                   $use_parents ? @{$co{'parents'}} : $hash_parent);
8005                 close $fd;
8006                 print "</div>\n"; # class="page_body"
8007                 git_footer_html();
8008
8009         } elsif ($format eq 'plain') {
8010                 local $/ = undef;
8011                 print <$fd>;
8012                 close $fd
8013                         or print "Reading git-diff-tree failed\n";
8014         } elsif ($format eq 'patch') {
8015                 local $/ = undef;
8016                 print <$fd>;
8017                 close $fd
8018                         or print "Reading git-format-patch failed\n";
8019         }
8020 }
8021
8022 sub git_commitdiff_plain {
8023         git_commitdiff(-format => 'plain');
8024 }
8025
8026 # format-patch-style patches
8027 sub git_patch {
8028         git_commitdiff(-format => 'patch', -single => 1);
8029 }
8030
8031 sub git_patches {
8032         git_commitdiff(-format => 'patch');
8033 }
8034
8035 sub git_history {
8036         git_log_generic('history', \&git_history_body,
8037                         $hash_base, $hash_parent_base,
8038                         $file_name, $hash);
8039 }
8040
8041 sub git_search {
8042         $searchtype ||= 'commit';
8043
8044         # check if appropriate features are enabled
8045         gitweb_check_feature('search')
8046                 or die_error(403, "Search is disabled");
8047         if ($searchtype eq 'pickaxe') {
8048                 # pickaxe may take all resources of your box and run for several minutes
8049                 # with every query - so decide by yourself how public you make this feature
8050                 gitweb_check_feature('pickaxe')
8051                         or die_error(403, "Pickaxe search is disabled");
8052         }
8053         if ($searchtype eq 'grep') {
8054                 # grep search might be potentially CPU-intensive, too
8055                 gitweb_check_feature('grep')
8056                         or die_error(403, "Grep search is disabled");
8057         }
8058
8059         if (!defined $searchtext) {
8060                 die_error(400, "Text field is empty");
8061         }
8062         if (!defined $hash) {
8063                 $hash = git_get_head_hash($project);
8064         }
8065         my %co = parse_commit($hash);
8066         if (!%co) {
8067                 die_error(404, "Unknown commit object");
8068         }
8069         if (!defined $page) {
8070                 $page = 0;
8071         }
8072
8073         if ($searchtype eq 'commit' ||
8074             $searchtype eq 'author' ||
8075             $searchtype eq 'committer') {
8076                 git_search_message(%co);
8077         } elsif ($searchtype eq 'pickaxe') {
8078                 git_search_changes(%co);
8079         } elsif ($searchtype eq 'grep') {
8080                 git_search_files(%co);
8081         } else {
8082                 die_error(400, "Unknown search type");
8083         }
8084 }
8085
8086 sub git_search_help {
8087         git_header_html();
8088         git_print_page_nav('','', $hash,$hash,$hash);
8089         print <<EOT;
8090 <p><strong>Pattern</strong> is by default a normal string that is matched precisely (but without
8091 regard to case, except in the case of pickaxe). However, when you check the <em>re</em> checkbox,
8092 the pattern entered is recognized as the POSIX extended
8093 <a href="https://en.wikipedia.org/wiki/Regular_expression">regular expression</a> (also case
8094 insensitive).</p>
8095 <dl>
8096 <dt><b>commit</b></dt>
8097 <dd>The commit messages and authorship information will be scanned for the given pattern.</dd>
8098 EOT
8099         my $have_grep = gitweb_check_feature('grep');
8100         if ($have_grep) {
8101                 print <<EOT;
8102 <dt><b>grep</b></dt>
8103 <dd>All files in the currently selected tree (HEAD unless you are explicitly browsing
8104     a different one) are searched for the given pattern. On large trees, this search can take
8105 a while and put some strain on the server, so please use it with some consideration. Note that
8106 due to git-grep peculiarity, currently if regexp mode is turned off, the matches are
8107 case-sensitive.</dd>
8108 EOT
8109         }
8110         print <<EOT;
8111 <dt><b>author</b></dt>
8112 <dd>Name and e-mail of the change author and date of birth of the patch will be scanned for the given pattern.</dd>
8113 <dt><b>committer</b></dt>
8114 <dd>Name and e-mail of the committer and date of commit will be scanned for the given pattern.</dd>
8115 EOT
8116         my $have_pickaxe = gitweb_check_feature('pickaxe');
8117         if ($have_pickaxe) {
8118                 print <<EOT;
8119 <dt><b>pickaxe</b></dt>
8120 <dd>All commits that caused the string to appear or disappear from any file (changes that
8121 added, removed or "modified" the string) will be listed. This search can take a while and
8122 takes a lot of strain on the server, so please use it wisely. Note that since you may be
8123 interested even in changes just changing the case as well, this search is case sensitive.</dd>
8124 EOT
8125         }
8126         print "</dl>\n";
8127         git_footer_html();
8128 }
8129
8130 sub git_shortlog {
8131         git_log_generic('shortlog', \&git_shortlog_body,
8132                         $hash, $hash_parent);
8133 }
8134
8135 ## ......................................................................
8136 ## feeds (RSS, Atom; OPML)
8137
8138 sub git_feed {
8139         my $format = shift || 'atom';
8140         my $have_blame = gitweb_check_feature('blame');
8141
8142         # Atom: http://www.atomenabled.org/developers/syndication/
8143         # RSS:  http://www.notestips.com/80256B3A007F2692/1/NAMO5P9UPQ
8144         if ($format ne 'rss' && $format ne 'atom') {
8145                 die_error(400, "Unknown web feed format");
8146         }
8147
8148         # log/feed of current (HEAD) branch, log of given branch, history of file/directory
8149         my $head = $hash || 'HEAD';
8150         my @commitlist = parse_commits($head, 150, 0, $file_name);
8151
8152         my %latest_commit;
8153         my %latest_date;
8154         my $content_type = "application/$format+xml";
8155         if (defined $cgi->http('HTTP_ACCEPT') &&
8156                  $cgi->Accept('text/xml') > $cgi->Accept($content_type)) {
8157                 # browser (feed reader) prefers text/xml
8158                 $content_type = 'text/xml';
8159         }
8160         if (defined($commitlist[0])) {
8161                 %latest_commit = %{$commitlist[0]};
8162                 my $latest_epoch = $latest_commit{'committer_epoch'};
8163                 exit_if_unmodified_since($latest_epoch);
8164                 %latest_date = parse_date($latest_epoch, $latest_commit{'committer_tz'});
8165         }
8166         print $cgi->header(
8167                 -type => $content_type,
8168                 -charset => 'utf-8',
8169                 %latest_date ? (-last_modified => $latest_date{'rfc2822'}) : (),
8170                 -status => '200 OK');
8171
8172         # Optimization: skip generating the body if client asks only
8173         # for Last-Modified date.
8174         return if ($cgi->request_method() eq 'HEAD');
8175
8176         # header variables
8177         my $title = "$site_name - $project/$action";
8178         my $feed_type = 'log';
8179         if (defined $hash) {
8180                 $title .= " - '$hash'";
8181                 $feed_type = 'branch log';
8182                 if (defined $file_name) {
8183                         $title .= " :: $file_name";
8184                         $feed_type = 'history';
8185                 }
8186         } elsif (defined $file_name) {
8187                 $title .= " - $file_name";
8188                 $feed_type = 'history';
8189         }
8190         $title .= " $feed_type";
8191         $title = esc_html($title);
8192         my $descr = git_get_project_description($project);
8193         if (defined $descr) {
8194                 $descr = esc_html($descr);
8195         } else {
8196                 $descr = "$project " .
8197                          ($format eq 'rss' ? 'RSS' : 'Atom') .
8198                          " feed";
8199         }
8200         my $owner = git_get_project_owner($project);
8201         $owner = esc_html($owner);
8202
8203         #header
8204         my $alt_url;
8205         if (defined $file_name) {
8206                 $alt_url = href(-full=>1, action=>"history", hash=>$hash, file_name=>$file_name);
8207         } elsif (defined $hash) {
8208                 $alt_url = href(-full=>1, action=>"log", hash=>$hash);
8209         } else {
8210                 $alt_url = href(-full=>1, action=>"summary");
8211         }
8212         print qq!<?xml version="1.0" encoding="utf-8"?>\n!;
8213         if ($format eq 'rss') {
8214                 print <<XML;
8215 <rss version="2.0" xmlns:content="http://purl.org/rss/1.0/modules/content/">
8216 <channel>
8217 XML
8218                 print "<title>$title</title>\n" .
8219                       "<link>$alt_url</link>\n" .
8220                       "<description>$descr</description>\n" .
8221                       "<language>en</language>\n" .
8222                       # project owner is responsible for 'editorial' content
8223                       "<managingEditor>$owner</managingEditor>\n";
8224                 if (defined $logo || defined $favicon) {
8225                         # prefer the logo to the favicon, since RSS
8226                         # doesn't allow both
8227                         my $img = esc_url($logo || $favicon);
8228                         print "<image>\n" .
8229                               "<url>$img</url>\n" .
8230                               "<title>$title</title>\n" .
8231                               "<link>$alt_url</link>\n" .
8232                               "</image>\n";
8233                 }
8234                 if (%latest_date) {
8235                         print "<pubDate>$latest_date{'rfc2822'}</pubDate>\n";
8236                         print "<lastBuildDate>$latest_date{'rfc2822'}</lastBuildDate>\n";
8237                 }
8238                 print "<generator>gitweb v.$version/$git_version</generator>\n";
8239         } elsif ($format eq 'atom') {
8240                 print <<XML;
8241 <feed xmlns="http://www.w3.org/2005/Atom">
8242 XML
8243                 print "<title>$title</title>\n" .
8244                       "<subtitle>$descr</subtitle>\n" .
8245                       '<link rel="alternate" type="text/html" href="' .
8246                       $alt_url . '" />' . "\n" .
8247                       '<link rel="self" type="' . $content_type . '" href="' .
8248                       $cgi->self_url() . '" />' . "\n" .
8249                       "<id>" . href(-full=>1) . "</id>\n" .
8250                       # use project owner for feed author
8251                       "<author><name>$owner</name></author>\n";
8252                 if (defined $favicon) {
8253                         print "<icon>" . esc_url($favicon) . "</icon>\n";
8254                 }
8255                 if (defined $logo) {
8256                         # not twice as wide as tall: 72 x 27 pixels
8257                         print "<logo>" . esc_url($logo) . "</logo>\n";
8258                 }
8259                 if (! %latest_date) {
8260                         # dummy date to keep the feed valid until commits trickle in:
8261                         print "<updated>1970-01-01T00:00:00Z</updated>\n";
8262                 } else {
8263                         print "<updated>$latest_date{'iso-8601'}</updated>\n";
8264                 }
8265                 print "<generator version='$version/$git_version'>gitweb</generator>\n";
8266         }
8267
8268         # contents
8269         for (my $i = 0; $i <= $#commitlist; $i++) {
8270                 my %co = %{$commitlist[$i]};
8271                 my $commit = $co{'id'};
8272                 # we read 150, we always show 30 and the ones more recent than 48 hours
8273                 if (($i >= 20) && ((time - $co{'author_epoch'}) > 48*60*60)) {
8274                         last;
8275                 }
8276                 my %cd = parse_date($co{'author_epoch'}, $co{'author_tz'});
8277
8278                 # get list of changed files
8279                 open my $fd, "-|", git_cmd(), "diff-tree", '-r', @diff_opts,
8280                         $co{'parent'} || "--root",
8281                         $co{'id'}, "--", (defined $file_name ? $file_name : ())
8282                         or next;
8283                 my @difftree = map { chomp; $_ } <$fd>;
8284                 close $fd
8285                         or next;
8286
8287                 # print element (entry, item)
8288                 my $co_url = href(-full=>1, action=>"commitdiff", hash=>$commit);
8289                 if ($format eq 'rss') {
8290                         print "<item>\n" .
8291                               "<title>" . esc_html($co{'title'}) . "</title>\n" .
8292                               "<author>" . esc_html($co{'author'}) . "</author>\n" .
8293                               "<pubDate>$cd{'rfc2822'}</pubDate>\n" .
8294                               "<guid isPermaLink=\"true\">$co_url</guid>\n" .
8295                               "<link>$co_url</link>\n" .
8296                               "<description>" . esc_html($co{'title'}) . "</description>\n" .
8297                               "<content:encoded>" .
8298                               "<![CDATA[\n";
8299                 } elsif ($format eq 'atom') {
8300                         print "<entry>\n" .
8301                               "<title type=\"html\">" . esc_html($co{'title'}) . "</title>\n" .
8302                               "<updated>$cd{'iso-8601'}</updated>\n" .
8303                               "<author>\n" .
8304                               "  <name>" . esc_html($co{'author_name'}) . "</name>\n";
8305                         if ($co{'author_email'}) {
8306                                 print "  <email>" . esc_html($co{'author_email'}) . "</email>\n";
8307                         }
8308                         print "</author>\n" .
8309                               # use committer for contributor
8310                               "<contributor>\n" .
8311                               "  <name>" . esc_html($co{'committer_name'}) . "</name>\n";
8312                         if ($co{'committer_email'}) {
8313                                 print "  <email>" . esc_html($co{'committer_email'}) . "</email>\n";
8314                         }
8315                         print "</contributor>\n" .
8316                               "<published>$cd{'iso-8601'}</published>\n" .
8317                               "<link rel=\"alternate\" type=\"text/html\" href=\"$co_url\" />\n" .
8318                               "<id>$co_url</id>\n" .
8319                               "<content type=\"xhtml\" xml:base=\"" . esc_url($my_url) . "\">\n" .
8320                               "<div xmlns=\"http://www.w3.org/1999/xhtml\">\n";
8321                 }
8322                 my $comment = $co{'comment'};
8323                 print "<pre>\n";
8324                 foreach my $line (@$comment) {
8325                         $line = esc_html($line);
8326                         print "$line\n";
8327                 }
8328                 print "</pre><ul>\n";
8329                 foreach my $difftree_line (@difftree) {
8330                         my %difftree = parse_difftree_raw_line($difftree_line);
8331                         next if !$difftree{'from_id'};
8332
8333                         my $file = $difftree{'file'} || $difftree{'to_file'};
8334
8335                         print "<li>" .
8336                               "[" .
8337                               $cgi->a({-href => href(-full=>1, action=>"blobdiff",
8338                                                      hash=>$difftree{'to_id'}, hash_parent=>$difftree{'from_id'},
8339                                                      hash_base=>$co{'id'}, hash_parent_base=>$co{'parent'},
8340                                                      file_name=>$file, file_parent=>$difftree{'from_file'}),
8341                                       -title => "diff"}, 'D');
8342                         if ($have_blame) {
8343                                 print $cgi->a({-href => href(-full=>1, action=>"blame",
8344                                                              file_name=>$file, hash_base=>$commit),
8345                                               -title => "blame"}, 'B');
8346                         }
8347                         # if this is not a feed of a file history
8348                         if (!defined $file_name || $file_name ne $file) {
8349                                 print $cgi->a({-href => href(-full=>1, action=>"history",
8350                                                              file_name=>$file, hash=>$commit),
8351                                               -title => "history"}, 'H');
8352                         }
8353                         $file = esc_path($file);
8354                         print "] ".
8355                               "$file</li>\n";
8356                 }
8357                 if ($format eq 'rss') {
8358                         print "</ul>]]>\n" .
8359                               "</content:encoded>\n" .
8360                               "</item>\n";
8361                 } elsif ($format eq 'atom') {
8362                         print "</ul>\n</div>\n" .
8363                               "</content>\n" .
8364                               "</entry>\n";
8365                 }
8366         }
8367
8368         # end of feed
8369         if ($format eq 'rss') {
8370                 print "</channel>\n</rss>\n";
8371         } elsif ($format eq 'atom') {
8372                 print "</feed>\n";
8373         }
8374 }
8375
8376 sub git_rss {
8377         git_feed('rss');
8378 }
8379
8380 sub git_atom {
8381         git_feed('atom');
8382 }
8383
8384 sub git_opml {
8385         my @list = git_get_projects_list($project_filter, $strict_export);
8386         if (!@list) {
8387                 die_error(404, "No projects found");
8388         }
8389
8390         print $cgi->header(
8391                 -type => 'text/xml',
8392                 -charset => 'utf-8',
8393                 -content_disposition => 'inline; filename="opml.xml"');
8394
8395         my $title = esc_html($site_name);
8396         my $filter = " within subdirectory ";
8397         if (defined $project_filter) {
8398                 $filter .= esc_html($project_filter);
8399         } else {
8400                 $filter = "";
8401         }
8402         print <<XML;
8403 <?xml version="1.0" encoding="utf-8"?>
8404 <opml version="1.0">
8405 <head>
8406   <title>$title OPML Export$filter</title>
8407 </head>
8408 <body>
8409 <outline text="git RSS feeds">
8410 XML
8411
8412         foreach my $pr (@list) {
8413                 my %proj = %$pr;
8414                 my $head = git_get_head_hash($proj{'path'});
8415                 if (!defined $head) {
8416                         next;
8417                 }
8418                 $git_dir = "$projectroot/$proj{'path'}";
8419                 my %co = parse_commit($head);
8420                 if (!%co) {
8421                         next;
8422                 }
8423
8424                 my $path = esc_html(chop_str($proj{'path'}, 25, 5));
8425                 my $rss  = href('project' => $proj{'path'}, 'action' => 'rss', -full => 1);
8426                 my $html = href('project' => $proj{'path'}, 'action' => 'summary', -full => 1);
8427                 print "<outline type=\"rss\" text=\"$path\" title=\"$path\" xmlUrl=\"$rss\" htmlUrl=\"$html\"/>\n";
8428         }
8429         print <<XML;
8430 </outline>
8431 </body>
8432 </opml>
8433 XML
8434 }