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