iankelling.org Git - distro-setup/blob - filesystem/usr/share/gitweb/gitweb.cgi

   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 $version = "2.8.1";
  35
  36 our ($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 = "/usr/bin/git";
  80
  81 # absolute fs-path which will be prepended to the project path
  82 #our $projectroot = "/pub/scm";
  83 our $projectroot = "/pub/git";
  84
  85 # fs traversing limit for getting project list
  86 # the number is relative to the projectroot
  87 our $project_maxdepth = 2007;
  88
  89 # string of the home link on top of all pages
  90 our $home_link_str = "projects";
  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 $site_name = ""
  98                  || ($ENV{'SERVER_NAME'} || "Untitled") . " Git";
  99
 100 # html snippet to include in the <head> section of each page
 101 our $site_html_head_string = "";
 102 # filename of html text to include at top of each page
 103 our $site_header = "";
 104 # html text to include at home page
 105 our $home_text = "indextext.html";
 106 # filename of html text to include at bottom of each page
 107 our $site_footer = "";
 108
 109 # URI of stylesheets
 110 our @stylesheets = ("static/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 = "static/git-logo.png";
 115 # URI of GIT favicon, assumed to be image/png type
 116 our $favicon = "static/git-favicon.png";
 117 # URI of gitweb.js (JavaScript code for gitweb)
 118 our $javascript = "static/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 = "";
 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 = "";
 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 $strict_export = "";
 161
 162 # list of git base URLs used for URL to where fetch project from,
 163 # i.e. full URL is "$git_base_url/$project"
 164 our @git_base_url_list = grep { $_ ne '' } ("");
 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";
 200
 201 # information about snapshot formats that gitweb is capable of serving
 202 our %known_snapshot_formats = (
 203         # name => {
 204         #       'display' => display name,
 205         #       'type' => mime type,
 206         #       'suffix' => filename suffix,
 207         #       'format' => --format for git-archive,
 208         #       'compressor' => [compressor command and arguments]
 209         #                       (array reference, optional)
 210         #       'disabled' => boolean (optional)}
 211         #
 212         'tgz' => {
 213                 'display' => 'tar.gz',
 214                 'type' => 'application/x-gzip',
 215                 'suffix' => '.tar.gz',
 216                 'format' => 'tar',
 217                 'compressor' => ['gzip', '-n']},
 218
 219         'tbz2' => {
 220                 'display' => 'tar.bz2',
 221                 'type' => 'application/x-bzip2',
 222                 'suffix' => '.tar.bz2',
 223                 'format' => 'tar',
 224                 'compressor' => ['bzip2']},
 225
 226         'txz' => {
 227                 'display' => 'tar.xz',
 228                 'type' => 'application/x-xz',
 229                 'suffix' => '.tar.xz',
 230                 'format' => 'tar',
 231                 'compressor' => ['xz'],
 232                 'disabled' => 1},
 233
 234         'zip' => {
 235                 'display' => 'zip',
 236                 'type' => 'application/x-zip',
 237                 'suffix' => '.zip',
 238                 'format' => 'zip'},
 239 );
 240
 241 # Aliases so we understand old gitweb.snapshot values in repository
 242 # configuration.
 243 our %known_snapshot_format_aliases = (
 244         'gzip'  => 'tgz',
 245         'bzip2' => 'tbz2',
 246         'xz'    => 'txz',
 247
 248         # backward compatibility: legacy gitweb config support
 249         'x-gzip' => undef, 'gz' => undef,
 250         'x-bzip2' => undef, 'bz2' => undef,
 251         'x-zip' => undef, '' => undef,
 252 );
 253
 254 # Pixel sizes for icons and avatars. If the default font sizes or lineheights
 255 # are changed, it may be appropriate to change these values too via
 256 # $GITWEB_CONFIG.
 257 our %avatar_size = (
 258         'default' => 16,
 259         'double'  => 32
 260 );
 261
 262 # Used to set the maximum load that we will still respond to gitweb queries.
 263 # If server load exceed this value then return "503 server busy" error.
 264 # If gitweb cannot determined server load, it is taken to be 0.
 265 # Leave it undefined (or set to 'undef') to turn off load checking.
 266 our $maxload = 300;
 267
 268 # configuration for 'highlight' (http://www.andre-simon.de/)
 269 # match by basename
 270 our %highlight_basename = (
 271         #'Program' => 'py',
 272         #'Library' => 'py',
 273         'SConstruct' => 'py', # SCons equivalent of Makefile
 274         'Makefile' => 'make',
 275 );
 276 # match by extension
 277 our %highlight_ext = (
 278         # main extensions, defining name of syntax;
 279         # see files in /usr/share/highlight/langDefs/ directory
 280         (map { $_ => $_ } qw(py rb java css js tex bib xml awk bat ini spec tcl sql)),
 281         # alternate extensions, see /etc/highlight/filetypes.conf
 282         (map { $_ => 'c'   } qw(c h)),
 283         (map { $_ => 'sh'  } qw(sh bash zsh ksh)),
 284         (map { $_ => 'cpp' } qw(cpp cxx c++ cc)),
 285         (map { $_ => 'php' } qw(php php3 php4 php5 phps)),
 286         (map { $_ => 'pl'  } qw(pl perl pm)), # perhaps also 'cgi'
 287         (map { $_ => 'make'} qw(make mak mk)),
 288         (map { $_ => 'xml' } qw(xml xhtml html htm)),
 289 );
 290
 291 # You define site-wide feature defaults here; override them with
 292 # $GITWEB_CONFIG as necessary.
 293 our %feature = (
 294         # feature => {
 295         #       'sub' => feature-sub (subroutine),
 296         #       'override' => allow-override (boolean),
 297         #       'default' => [ default options...] (array reference)}
 298         #
 299         # if feature is overridable (it means that allow-override has true value),
 300         # then feature-sub will be called with default options as parameters;
 301         # return value of feature-sub indicates if to enable specified feature
 302         #
 303         # if there is no 'sub' key (no feature-sub), then feature cannot be
 304         # overridden
 305         #
 306         # use gitweb_get_feature(<feature>) to retrieve the <feature> value
 307         # (an array) or gitweb_check_feature(<feature>) to check if <feature>
 308         # is enabled
 309
 310         # Enable the 'blame' blob view, showing the last commit that modified
 311         # each line in the file. This can be very CPU-intensive.
 312
 313         # To enable system wide have in $GITWEB_CONFIG
 314         # $feature{'blame'}{'default'} = [1];
 315         # To have project specific config enable override in $GITWEB_CONFIG
 316         # $feature{'blame'}{'override'} = 1;
 317         # and in project config gitweb.blame = 0|1;
 318         'blame' => {
 319                 'sub' => sub { feature_bool('blame', @_) },
 320                 'override' => 0,
 321                 'default' => [0]},
 322
 323         # Enable the 'snapshot' link, providing a compressed archive of any
 324         # tree. This can potentially generate high traffic if you have large
 325         # project.
 326
 327         # Value is a list of formats defined in %known_snapshot_formats that
 328         # you wish to offer.
 329         # To disable system wide have in $GITWEB_CONFIG
 330         # $feature{'snapshot'}{'default'} = [];
 331         # To have project specific config enable override in $GITWEB_CONFIG
 332         # $feature{'snapshot'}{'override'} = 1;
 333         # and in project config, a comma-separated list of formats or "none"
 334         # to disable.  Example: gitweb.snapshot = tbz2,zip;
 335         'snapshot' => {
 336                 'sub' => \&feature_snapshot,
 337                 'override' => 0,
 338                 'default' => ['tgz']},
 339
 340         # Enable text search, which will list the commits which match author,
 341         # committer or commit text to a given string.  Enabled by default.
 342         # Project specific override is not supported.
 343         #
 344         # Note that this controls all search features, which means that if
 345         # it is disabled, then 'grep' and 'pickaxe' search would also be
 346         # disabled.
 347         'search' => {
 348                 'override' => 0,
 349                 'default' => [1]},
 350
 351         # Enable grep search, which will list the files in currently selected
 352         # tree containing the given string. Enabled by default. This can be
 353         # potentially CPU-intensive, of course.
 354         # Note that you need to have 'search' feature enabled too.
 355
 356         # To enable system wide have in $GITWEB_CONFIG
 357         # $feature{'grep'}{'default'} = [1];
 358         # To have project specific config enable override in $GITWEB_CONFIG
 359         # $feature{'grep'}{'override'} = 1;
 360         # and in project config gitweb.grep = 0|1;
 361         'grep' => {
 362                 'sub' => sub { feature_bool('grep', @_) },
 363                 'override' => 0,
 364                 'default' => [1]},
 365
 366         # Enable the pickaxe search, which will list the commits that modified
 367         # a given string in a file. This can be practical and quite faster
 368         # alternative to 'blame', but still potentially CPU-intensive.
 369         # Note that you need to have 'search' feature enabled too.
 370
 371         # To enable system wide have in $GITWEB_CONFIG
 372         # $feature{'pickaxe'}{'default'} = [1];
 373         # To have project specific config enable override in $GITWEB_CONFIG
 374         # $feature{'pickaxe'}{'override'} = 1;
 375         # and in project config gitweb.pickaxe = 0|1;
 376         'pickaxe' => {
 377                 'sub' => sub { feature_bool('pickaxe', @_) },
 378                 'override' => 0,
 379                 'default' => [1]},
 380
 381         # Enable showing size of blobs in a 'tree' view, in a separate
 382         # column, similar to what 'ls -l' does.  This cost a bit of IO.
 383
 384         # To disable system wide have in $GITWEB_CONFIG
 385         # $feature{'show-sizes'}{'default'} = [0];
 386         # To have project specific config enable override in $GITWEB_CONFIG
 387         # $feature{'show-sizes'}{'override'} = 1;
 388         # and in project config gitweb.showsizes = 0|1;
 389         'show-sizes' => {
 390                 'sub' => sub { feature_bool('showsizes', @_) },
 391                 'override' => 0,
 392                 'default' => [1]},
 393
 394         # Make gitweb use an alternative format of the URLs which can be
 395         # more readable and natural-looking: project name is embedded
 396         # directly in the path and the query string contains other
 397         # auxiliary information. All gitweb installations recognize
 398         # URL in either format; this configures in which formats gitweb
 399         # generates links.
 400
 401         # To enable system wide have in $GITWEB_CONFIG
 402         # $feature{'pathinfo'}{'default'} = [1];
 403         # Project specific override is not supported.
 404
 405         # Note that you will need to change the default location of CSS,
 406         # favicon, logo and possibly other files to an absolute URL. Also,
 407         # if gitweb.cgi serves as your indexfile, you will need to force
 408         # $my_uri to contain the script name in your $GITWEB_CONFIG.
 409         'pathinfo' => {
 410                 'override' => 0,
 411                 'default' => [0]},
 412
 413         # Make gitweb consider projects in project root subdirectories
 414         # to be forks of existing projects. Given project $projname.git,
 415         # projects matching $projname/*.git will not be shown in the main
 416         # projects list, instead a '+' mark will be added to $projname
 417         # there and a 'forks' view will be enabled for the project, listing
 418         # all the forks. If project list is taken from a file, forks have
 419         # to be listed after the main project.
 420
 421         # To enable system wide have in $GITWEB_CONFIG
 422         # $feature{'forks'}{'default'} = [1];
 423         # Project specific override is not supported.
 424         'forks' => {
 425                 'override' => 0,
 426                 'default' => [0]},
 427
 428         # Insert custom links to the action bar of all project pages.
 429         # This enables you mainly to link to third-party scripts integrating
 430         # into gitweb; e.g. git-browser for graphical history representation
 431         # or custom web-based repository administration interface.
 432
 433         # The 'default' value consists of a list of triplets in the form
 434         # (label, link, position) where position is the label after which
 435         # to insert the link and link is a format string where %n expands
 436         # to the project name, %f to the project path within the filesystem,
 437         # %h to the current hash (h gitweb parameter) and %b to the current
 438         # hash base (hb gitweb parameter); %% expands to %.
 439
 440         # To enable system wide have in $GITWEB_CONFIG e.g.
 441         # $feature{'actions'}{'default'} = [('graphiclog',
 442         #       '/git-browser/by-commit.html?r=%n', 'summary')];
 443         # Project specific override is not supported.
 444         'actions' => {
 445                 'override' => 0,
 446                 'default' => []},
 447
 448         # Allow gitweb scan project content tags of project repository,
 449         # and display the popular Web 2.0-ish "tag cloud" near the projects
 450         # list.  Note that this is something COMPLETELY different from the
 451         # normal Git tags.
 452
 453         # gitweb by itself can show existing tags, but it does not handle
 454         # tagging itself; you need to do it externally, outside gitweb.
 455         # The format is described in git_get_project_ctags() subroutine.
 456         # You may want to install the HTML::TagCloud Perl module to get
 457         # a pretty tag cloud instead of just a list of tags.
 458
 459         # To enable system wide have in $GITWEB_CONFIG
 460         # $feature{'ctags'}{'default'} = [1];
 461         # Project specific override is not supported.
 462
 463         # In the future whether ctags editing is enabled might depend
 464         # on the value, but using 1 should always mean no editing of ctags.
 465         'ctags' => {
 466                 'override' => 0,
 467                 'default' => [0]},
 468
 469         # The maximum number of patches in a patchset generated in patch
 470         # view. Set this to 0 or undef to disable patch view, or to a
 471         # negative number to remove any limit.
 472
 473         # To disable system wide have in $GITWEB_CONFIG
 474         # $feature{'patches'}{'default'} = [0];
 475         # To have project specific config enable override in $GITWEB_CONFIG
 476         # $feature{'patches'}{'override'} = 1;
 477         # and in project config gitweb.patches = 0|n;
 478         # where n is the maximum number of patches allowed in a patchset.
 479         'patches' => {
 480                 'sub' => \&feature_patches,
 481                 'override' => 0,
 482                 'default' => [16]},
 483
 484         # Avatar support. When this feature is enabled, views such as
 485         # shortlog or commit will display an avatar associated with
 486         # the email of the committer(s) and/or author(s).
 487
 488         # Currently available providers are gravatar and picon.
 489         # If an unknown provider is specified, the feature is disabled.
 490
 491         # Gravatar depends on Digest::MD5.
 492         # Picon currently relies on the indiana.edu database.
 493
 494         # To enable system wide have in $GITWEB_CONFIG
 495         # $feature{'avatar'}{'default'} = ['<provider>'];
 496         # where <provider> is either gravatar or picon.
 497         # To have project specific config enable override in $GITWEB_CONFIG
 498         # $feature{'avatar'}{'override'} = 1;
 499         # and in project config gitweb.avatar = <provider>;
 500         'avatar' => {
 501                 'sub' => \&feature_avatar,
 502                 'override' => 0,
 503                 'default' => ['']},
 504
 505         # Enable displaying how much time and how many git commands
 506         # it took to generate and display page.  Disabled by default.
 507         # Project specific override is not supported.
 508         'timed' => {
 509                 'override' => 0,
 510                 'default' => [0]},
 511
 512         # Enable turning some links into links to actions which require
 513         # JavaScript to run (like 'blame_incremental').  Not enabled by
 514         # default.  Project specific override is currently not supported.
 515         'javascript-actions' => {
 516                 'override' => 0,
 517                 'default' => [0]},
 518
 519         # Enable and configure ability to change common timezone for dates
 520         # in gitweb output via JavaScript.  Enabled by default.
 521         # Project specific override is not supported.
 522         'javascript-timezone' => {
 523                 'override' => 0,
 524                 'default' => [
 525                         'local',     # default timezone: 'utc', 'local', or '(-|+)HHMM' format,
 526                                      # or undef to turn off this feature
 527                         'gitweb_tz', # name of cookie where to store selected timezone
 528                         'datetime',  # CSS class used to mark up dates for manipulation
 529                 ]},
 530
 531         # Syntax highlighting support. This is based on Daniel Svensson's
 532         # and Sham Chukoury's work in gitweb-xmms2.git.
 533         # It requires the 'highlight' program present in $PATH,
 534         # and therefore is disabled by default.
 535
 536         # To enable system wide have in $GITWEB_CONFIG
 537         # $feature{'highlight'}{'default'} = [1];
 538
 539         'highlight' => {
 540                 'sub' => sub { feature_bool('highlight', @_) },
 541                 'override' => 0,
 542                 'default' => [0]},
 543
 544         # Enable displaying of remote heads in the heads list
 545
 546         # To enable system wide have in $GITWEB_CONFIG
 547         # $feature{'remote_heads'}{'default'} = [1];
 548         # To have project specific config enable override in $GITWEB_CONFIG
 549         # $feature{'remote_heads'}{'override'} = 1;
 550         # and in project config gitweb.remoteheads = 0|1;
 551         'remote_heads' => {
 552                 'sub' => sub { feature_bool('remote_heads', @_) },
 553                 'override' => 0,
 554                 'default' => [0]},
 555
 556         # Enable showing branches under other refs in addition to heads
 557
 558         # To set system wide extra branch refs have in $GITWEB_CONFIG
 559         # $feature{'extra-branch-refs'}{'default'} = ['dirs', 'of', 'choice'];
 560         # To have project specific config enable override in $GITWEB_CONFIG
 561         # $feature{'extra-branch-refs'}{'override'} = 1;
 562         # and in project config gitweb.extrabranchrefs = dirs of choice
 563         # Every directory is separated with whitespace.
 564
 565         'extra-branch-refs' => {
 566                 'sub' => \&feature_extra_branch_refs,
 567                 'override' => 0,
 568                 'default' => []},
 569 );
 570
 571 sub gitweb_get_feature {
 572         my ($name) = @_;
 573         return unless exists $feature{$name};
 574         my ($sub, $override, @defaults) = (
 575                 $feature{$name}{'sub'},
 576                 $feature{$name}{'override'},
 577                 @{$feature{$name}{'default'}});
 578         # project specific override is possible only if we have project
 579         our $git_dir; # global variable, declared later
 580         if (!$override || !defined $git_dir) {
 581                 return @defaults;
 582         }
 583         if (!defined $sub) {
 584                 warn "feature $name is not overridable";
 585                 return @defaults;
 586         }
 587         return $sub->(@defaults);
 588 }
 589
 590 # A wrapper to check if a given feature is enabled.
 591 # With this, you can say
 592 #
 593 #   my $bool_feat = gitweb_check_feature('bool_feat');
 594 #   gitweb_check_feature('bool_feat') or somecode;
 595 #
 596 # instead of
 597 #
 598 #   my ($bool_feat) = gitweb_get_feature('bool_feat');
 599 #   (gitweb_get_feature('bool_feat'))[0] or somecode;
 600 #
 601 sub gitweb_check_feature {
 602         return (gitweb_get_feature(@_))[0];
 603 }
 604
 605
 606 sub feature_bool {
 607         my $key = shift;
 608         my ($val) = git_get_project_config($key, '--bool');
 609
 610         if (!defined $val) {
 611                 return ($_[0]);
 612         } elsif ($val eq 'true') {
 613                 return (1);
 614         } elsif ($val eq 'false') {
 615                 return (0);
 616         }
 617 }
 618
 619 sub feature_snapshot {
 620         my (@fmts) = @_;
 621
 622         my ($val) = git_get_project_config('snapshot');
 623
 624         if ($val) {
 625                 @fmts = ($val eq 'none' ? () : split /\s*[,\s]\s*/, $val);
 626         }
 627
 628         return @fmts;
 629 }
 630
 631 sub feature_patches {
 632         my @val = (git_get_project_config('patches', '--int'));
 633
 634         if (@val) {
 635                 return @val;
 636         }
 637
 638         return ($_[0]);
 639 }
 640
 641 sub feature_avatar {
 642         my @val = (git_get_project_config('avatar'));
 643
 644         return @val ? @val : @_;
 645 }
 646
 647 sub feature_extra_branch_refs {
 648         my (@branch_refs) = @_;
 649         my $values = git_get_project_config('extrabranchrefs');
 650
 651         if ($values) {
 652                 $values = config_to_multi ($values);
 653                 @branch_refs = ();
 654                 foreach my $value (@{$values}) {
 655                         push @branch_refs, split /\s+/, $value;
 656                 }
 657         }
 658
 659         return @branch_refs;
 660 }
 661
 662 # checking HEAD file with -e is fragile if the repository was
 663 # initialized long time ago (i.e. symlink HEAD) and was pack-ref'ed
 664 # and then pruned.
 665 sub check_head_link {
 666         my ($dir) = @_;
 667         my $headfile = "$dir/HEAD";
 668         return ((-e $headfile) ||
 669                 (-l $headfile && readlink($headfile) =~ /^refs\/heads\//));
 670 }
 671
 672 sub check_export_ok {
 673         my ($dir) = @_;
 674         return (check_head_link($dir) &&
 675                 (!$export_ok || -e "$dir/$export_ok") &&
 676                 (!$export_auth_hook || $export_auth_hook->($dir)));
 677 }
 678
 679 # process alternate names for backward compatibility
 680 # filter out unsupported (unknown) snapshot formats
 681 sub filter_snapshot_fmts {
 682         my @fmts = @_;
 683
 684         @fmts = map {
 685                 exists $known_snapshot_format_aliases{$_} ?
 686                        $known_snapshot_format_aliases{$_} : $_} @fmts;
 687         @fmts = grep {
 688                 exists $known_snapshot_formats{$_} &&
 689                 !$known_snapshot_formats{$_}{'disabled'}} @fmts;
 690 }
 691
 692 sub filter_and_validate_refs {
 693         my @refs = @_;
 694         my %unique_refs = ();
 695
 696         foreach my $ref (@refs) {
 697                 die_error(500, "Invalid ref '$ref' in 'extra-branch-refs' feature") unless (is_valid_ref_format($ref));
 698                 # 'heads' are added implicitly in get_branch_refs().
 699                 $unique_refs{$ref} = 1 if ($ref ne 'heads');
 700         }
 701         return sort keys %unique_refs;
 702 }
 703
 704 # If it is set to code reference, it is code that it is to be run once per
 705 # request, allowing updating configurations that change with each request,
 706 # while running other code in config file only once.
 707 #
 708 # Otherwise, if it is false then gitweb would process config file only once;
 709 # if it is true then gitweb config would be run for each request.
 710 our $per_request_config = 1;
 711
 712 # read and parse gitweb config file given by its parameter.
 713 # returns true on success, false on recoverable error, allowing
 714 # to chain this subroutine, using first file that exists.
 715 # dies on errors during parsing config file, as it is unrecoverable.
 716 sub read_config_file {
 717         my $filename = shift;
 718         return unless defined $filename;
 719         # die if there are errors parsing config file
 720         if (-e $filename) {
 721                 do $filename;
 722                 die $@ if $@;
 723                 return 1;
 724         }
 725         return;
 726 }
 727
 728 our ($GITWEB_CONFIG, $GITWEB_CONFIG_SYSTEM, $GITWEB_CONFIG_COMMON);
 729 sub evaluate_gitweb_config {
 730         our $GITWEB_CONFIG = $ENV{'GITWEB_CONFIG'} || "gitweb_config.perl";
 731         our $GITWEB_CONFIG_SYSTEM = $ENV{'GITWEB_CONFIG_SYSTEM'} || "/etc/gitweb.conf";
 732         our $GITWEB_CONFIG_COMMON = $ENV{'GITWEB_CONFIG_COMMON'} || "/etc/gitweb-common.conf";
 733
 734         # Protect against duplications of file names, to not read config twice.
 735         # Only one of $GITWEB_CONFIG and $GITWEB_CONFIG_SYSTEM is used, so
 736         # there possibility of duplication of filename there doesn't matter.
 737         $GITWEB_CONFIG = ""        if ($GITWEB_CONFIG eq $GITWEB_CONFIG_COMMON);
 738         $GITWEB_CONFIG_SYSTEM = "" if ($GITWEB_CONFIG_SYSTEM eq $GITWEB_CONFIG_COMMON);
 739
 740         # Common system-wide settings for convenience.
 741         # Those settings can be ovverriden by GITWEB_CONFIG or GITWEB_CONFIG_SYSTEM.
 742         read_config_file($GITWEB_CONFIG_COMMON);
 743
 744         # Use first config file that exists.  This means use the per-instance
 745         # GITWEB_CONFIG if exists, otherwise use GITWEB_SYSTEM_CONFIG.
 746         read_config_file($GITWEB_CONFIG) and return;
 747         read_config_file($GITWEB_CONFIG_SYSTEM);
 748 }
 749
 750 # Get loadavg of system, to compare against $maxload.
 751 # Currently it requires '/proc/loadavg' present to get loadavg;
 752 # if it is not present it returns 0, which means no load checking.
 753 sub get_loadavg {
 754         if( -e '/proc/loadavg' ){
 755                 open my $fd, '<', '/proc/loadavg'
 756                         or return 0;
 757                 my @load = split(/\s+/, scalar <$fd>);
 758                 close $fd;
 759
 760                 # The first three columns measure CPU and IO utilization of the last one,
 761                 # five, and 10 minute periods.  The fourth column shows the number of
 762                 # currently running processes and the total number of processes in the m/n
 763                 # format.  The last column displays the last process ID used.
 764                 return $load[0] || 0;
 765         }
 766         # additional checks for load average should go here for things that don't export
 767         # /proc/loadavg
 768
 769         return 0;
 770 }
 771
 772 # version of the core git binary
 773 our $git_version;
 774 sub evaluate_git_version {
 775         our $git_version = qx("$GIT" --version) =~ m/git version (.*)$/ ? $1 : "unknown";
 776         $number_of_git_cmds++;
 777 }
 778
 779 sub check_loadavg {
 780         if (defined $maxload && get_loadavg() > $maxload) {
 781                 die_error(503, "The load average on the server is too high");
 782         }
 783 }
 784
 785 # ======================================================================
 786 # input validation and dispatch
 787
 788 # input parameters can be collected from a variety of sources (presently, CGI
 789 # and PATH_INFO), so we define an %input_params hash that collects them all
 790 # together during validation: this allows subsequent uses (e.g. href()) to be
 791 # agnostic of the parameter origin
 792
 793 our %input_params = ();
 794
 795 # input parameters are stored with the long parameter name as key. This will
 796 # also be used in the href subroutine to convert parameters to their CGI
 797 # equivalent, and since the href() usage is the most frequent one, we store
 798 # the name -> CGI key mapping here, instead of the reverse.
 799 #
 800 # XXX: Warning: If you touch this, check the search form for updating,
 801 # too.
 802
 803 our @cgi_param_mapping = (
 804         project => "p",
 805         action => "a",
 806         file_name => "f",
 807         file_parent => "fp",
 808         hash => "h",
 809         hash_parent => "hp",
 810         hash_base => "hb",
 811         hash_parent_base => "hpb",
 812         page => "pg",
 813         order => "o",
 814         searchtext => "s",
 815         searchtype => "st",
 816         snapshot_format => "sf",
 817         extra_options => "opt",
 818         search_use_regexp => "sr",
 819         ctag => "by_tag",
 820         diff_style => "ds",
 821         project_filter => "pf",
 822         # this must be last entry (for manipulation from JavaScript)
 823         javascript => "js"
 824 );
 825 our %cgi_param_mapping = @cgi_param_mapping;
 826
 827 # we will also need to know the possible actions, for validation
 828 our %actions = (
 829         "blame" => \&git_blame,
 830         "blame_incremental" => \&git_blame_incremental,
 831         "blame_data" => \&git_blame_data,
 832         "blobdiff" => \&git_blobdiff,
 833         "blobdiff_plain" => \&git_blobdiff_plain,
 834         "blob" => \&git_blob,
 835         "blob_plain" => \&git_blob_plain,
 836         "commitdiff" => \&git_commitdiff,
 837         "commitdiff_plain" => \&git_commitdiff_plain,
 838         "commit" => \&git_commit,
 839         "forks" => \&git_forks,
 840         "heads" => \&git_heads,
 841         "history" => \&git_history,
 842         "log" => \&git_log,
 843         "patch" => \&git_patch,
 844         "patches" => \&git_patches,
 845         "remotes" => \&git_remotes,
 846         "rss" => \&git_rss,
 847         "atom" => \&git_atom,
 848         "search" => \&git_search,
 849         "search_help" => \&git_search_help,
 850         "shortlog" => \&git_shortlog,
 851         "summary" => \&git_summary,
 852         "tag" => \&git_tag,
 853         "tags" => \&git_tags,
 854         "tree" => \&git_tree,
 855         "snapshot" => \&git_snapshot,
 856         "object" => \&git_object,
 857         # those below don't need $project
 858         "opml" => \&git_opml,
 859         "project_list" => \&git_project_list,
 860         "project_index" => \&git_project_index,
 861 );
 862
 863 # finally, we have the hash of allowed extra_options for the commands that
 864 # allow them
 865 our %allowed_options = (
 866         "--no-merges" => [ qw(rss atom log shortlog history) ],
 867 );
 868
 869 # fill %input_params with the CGI parameters. All values except for 'opt'
 870 # should be single values, but opt can be an array. We should probably
 871 # build an array of parameters that can be multi-valued, but since for the time
 872 # being it's only this one, we just single it out
 873 sub evaluate_query_params {
 874         our $cgi;
 875
 876         while (my ($name, $symbol) = each %cgi_param_mapping) {
 877                 if ($symbol eq 'opt') {
 878                         $input_params{$name} = [ map { decode_utf8($_) } $cgi->multi_param($symbol) ];
 879                 } else {
 880                         $input_params{$name} = decode_utf8($cgi->param($symbol));
 881                 }
 882         }
 883 }
 884
 885 # now read PATH_INFO and update the parameter list for missing parameters
 886 sub evaluate_path_info {
 887         return if defined $input_params{'project'};
 888         return if !$path_info;
 889         $path_info =~ s,^/+,,;
 890         return if !$path_info;
 891
 892         # find which part of PATH_INFO is project
 893         my $project = $path_info;
 894         $project =~ s,/+$,,;
 895         while ($project && !check_head_link("$projectroot/$project")) {
 896                 $project =~ s,/*[^/]*$,,;
 897         }
 898         return unless $project;
 899         $input_params{'project'} = $project;
 900
 901         # do not change any parameters if an action is given using the query string
 902         return if $input_params{'action'};
 903         $path_info =~ s,^\Q$project\E/*,,;
 904
 905         # next, check if we have an action
 906         my $action = $path_info;
 907         $action =~ s,/.*$,,;
 908         if (exists $actions{$action}) {
 909                 $path_info =~ s,^$action/*,,;
 910                 $input_params{'action'} = $action;
 911         }
 912
 913         # list of actions that want hash_base instead of hash, but can have no
 914         # pathname (f) parameter
 915         my @wants_base = (
 916                 'tree',
 917                 'history',
 918         );
 919
 920         # we want to catch, among others
 921         # [$hash_parent_base[:$file_parent]..]$hash_parent[:$file_name]
 922         my ($parentrefname, $parentpathname, $refname, $pathname) =
 923                 ($path_info =~ /^(?:(.+?)(?::(.+))?\.\.)?([^:]+?)?(?::(.+))?$/);
 924
 925         # first, analyze the 'current' part
 926         if (defined $pathname) {
 927                 # we got "branch:filename" or "branch:dir/"
 928                 # we could use git_get_type(branch:pathname), but:
 929                 # - it needs $git_dir
 930                 # - it does a git() call
 931                 # - the convention of terminating directories with a slash
 932                 #   makes it superfluous
 933                 # - embedding the action in the PATH_INFO would make it even
 934                 #   more superfluous
 935                 $pathname =~ s,^/+,,;
 936                 if (!$pathname || substr($pathname, -1) eq "/") {
 937                         $input_params{'action'} ||= "tree";
 938                         $pathname =~ s,/$,,;
 939                 } else {
 940                         # the default action depends on whether we had parent info
 941                         # or not
 942                         if ($parentrefname) {
 943                                 $input_params{'action'} ||= "blobdiff_plain";
 944                         } else {
 945                                 $input_params{'action'} ||= "blob_plain";
 946                         }
 947                 }
 948                 $input_params{'hash_base'} ||= $refname;
 949                 $input_params{'file_name'} ||= $pathname;
 950         } elsif (defined $refname) {
 951                 # we got "branch". In this case we have to choose if we have to
 952                 # set hash or hash_base.
 953                 #
 954                 # Most of the actions without a pathname only want hash to be
 955                 # set, except for the ones specified in @wants_base that want
 956                 # hash_base instead. It should also be noted that hand-crafted
 957                 # links having 'history' as an action and no pathname or hash
 958                 # set will fail, but that happens regardless of PATH_INFO.
 959                 if (defined $parentrefname) {
 960                         # if there is parent let the default be 'shortlog' action
 961                         # (for http://git.example.com/repo.git/A..B links); if there
 962                         # is no parent, dispatch will detect type of object and set
 963                         # action appropriately if required (if action is not set)
 964                         $input_params{'action'} ||= "shortlog";
 965                 }
 966                 if ($input_params{'action'} &&
 967                     grep { $_ eq $input_params{'action'} } @wants_base) {
 968                         $input_params{'hash_base'} ||= $refname;
 969                 } else {
 970                         $input_params{'hash'} ||= $refname;
 971                 }
 972         }
 973
 974         # next, handle the 'parent' part, if present
 975         if (defined $parentrefname) {
 976                 # a missing pathspec defaults to the 'current' filename, allowing e.g.
 977                 # someproject/blobdiff/oldrev..newrev:/filename
 978                 if ($parentpathname) {
 979                         $parentpathname =~ s,^/+,,;
 980                         $parentpathname =~ s,/$,,;
 981                         $input_params{'file_parent'} ||= $parentpathname;
 982                 } else {
 983                         $input_params{'file_parent'} ||= $input_params{'file_name'};
 984                 }
 985                 # we assume that hash_parent_base is wanted if a path was specified,
 986                 # or if the action wants hash_base instead of hash
 987                 if (defined $input_params{'file_parent'} ||
 988                         grep { $_ eq $input_params{'action'} } @wants_base) {
 989                         $input_params{'hash_parent_base'} ||= $parentrefname;
 990                 } else {
 991                         $input_params{'hash_parent'} ||= $parentrefname;
 992                 }
 993         }
 994
 995         # for the snapshot action, we allow URLs in the form
 996         # $project/snapshot/$hash.ext
 997         # where .ext determines the snapshot and gets removed from the
 998         # passed $refname to provide the $hash.
 999         #
1000         # To be able to tell that $refname includes the format extension, we
1001         # require the following two conditions to be satisfied:
1002         # - the hash input parameter MUST have been set from the $refname part
1003         #   of the URL (i.e. they must be equal)
1004         # - the snapshot format MUST NOT have been defined already (e.g. from
1005         #   CGI parameter sf)
1006         # It's also useless to try any matching unless $refname has a dot,
1007         # so we check for that too
1008         if (defined $input_params{'action'} &&
1009                 $input_params{'action'} eq 'snapshot' &&
1010                 defined $refname && index($refname, '.') != -1 &&
1011                 $refname eq $input_params{'hash'} &&
1012                 !defined $input_params{'snapshot_format'}) {
1013                 # We loop over the known snapshot formats, checking for
1014                 # extensions. Allowed extensions are both the defined suffix
1015                 # (which includes the initial dot already) and the snapshot
1016                 # format key itself, with a prepended dot
1017                 while (my ($fmt, $opt) = each %known_snapshot_formats) {
1018                         my $hash = $refname;
1019                         unless ($hash =~ s/(\Q$opt->{'suffix'}\E|\Q.$fmt\E)$//) {
1020                                 next;
1021                         }
1022                         my $sfx = $1;
1023                         # a valid suffix was found, so set the snapshot format
1024                         # and reset the hash parameter
1025                         $input_params{'snapshot_format'} = $fmt;
1026                         $input_params{'hash'} = $hash;
1027                         # we also set the format suffix to the one requested
1028                         # in the URL: this way a request for e.g. .tgz returns
1029                         # a .tgz instead of a .tar.gz
1030                         $known_snapshot_formats{$fmt}{'suffix'} = $sfx;
1031                         last;
1032                 }
1033         }
1034 }
1035
1036 our ($action, $project, $file_name, $file_parent, $hash, $hash_parent, $hash_base,
1037      $hash_parent_base, @extra_options, $page, $searchtype, $search_use_regexp,
1038      $searchtext, $search_regexp, $project_filter);
1039 sub evaluate_and_validate_params {
1040         our $action = $input_params{'action'};
1041         if (defined $action) {
1042                 if (!is_valid_action($action)) {
1043                         die_error(400, "Invalid action parameter");
1044                 }
1045         }
1046
1047         # parameters which are pathnames
1048         our $project = $input_params{'project'};
1049         if (defined $project) {
1050                 if (!is_valid_project($project)) {
1051                         undef $project;
1052                         die_error(404, "No such project");
1053                 }
1054         }
1055
1056         our $project_filter = $input_params{'project_filter'};
1057         if (defined $project_filter) {
1058                 if (!is_valid_pathname($project_filter)) {
1059                         die_error(404, "Invalid project_filter parameter");
1060                 }
1061         }
1062
1063         our $file_name = $input_params{'file_name'};
1064         if (defined $file_name) {
1065                 if (!is_valid_pathname($file_name)) {
1066                         die_error(400, "Invalid file parameter");
1067                 }
1068         }
1069
1070         our $file_parent = $input_params{'file_parent'};
1071         if (defined $file_parent) {
1072                 if (!is_valid_pathname($file_parent)) {
1073                         die_error(400, "Invalid file parent parameter");
1074                 }
1075         }
1076
1077         # parameters which are refnames
1078         our $hash = $input_params{'hash'};
1079         if (defined $hash) {
1080                 if (!is_valid_refname($hash)) {
1081                         die_error(400, "Invalid hash parameter");
1082                 }
1083         }
1084
1085         our $hash_parent = $input_params{'hash_parent'};
1086         if (defined $hash_parent) {
1087                 if (!is_valid_refname($hash_parent)) {
1088                         die_error(400, "Invalid hash parent parameter");
1089                 }
1090         }
1091
1092         our $hash_base = $input_params{'hash_base'};
1093         if (defined $hash_base) {
1094                 if (!is_valid_refname($hash_base)) {
1095                         die_error(400, "Invalid hash base parameter");
1096                 }
1097         }
1098
1099         our @extra_options = @{$input_params{'extra_options'}};
1100         # @extra_options is always defined, since it can only be (currently) set from
1101         # CGI, and $cgi->param() returns the empty array in array context if the param
1102         # is not set
1103         foreach my $opt (@extra_options) {
1104                 if (not exists $allowed_options{$opt}) {
1105                         die_error(400, "Invalid option parameter");
1106                 }
1107                 if (not grep(/^$action$/, @{$allowed_options{$opt}})) {
1108                         die_error(400, "Invalid option parameter for this action");
1109                 }
1110         }
1111
1112         our $hash_parent_base = $input_params{'hash_parent_base'};
1113         if (defined $hash_parent_base) {
1114                 if (!is_valid_refname($hash_parent_base)) {
1115                         die_error(400, "Invalid hash parent base parameter");
1116                 }
1117         }
1118
1119         # other parameters
1120         our $page = $input_params{'page'};
1121         if (defined $page) {
1122                 if ($page =~ m/[^0-9]/) {
1123                         die_error(400, "Invalid page parameter");
1124                 }
1125         }
1126
1127         our $searchtype = $input_params{'searchtype'};
1128         if (defined $searchtype) {
1129                 if ($searchtype =~ m/[^a-z]/) {
1130                         die_error(400, "Invalid searchtype parameter");
1131                 }
1132         }
1133
1134         our $search_use_regexp = $input_params{'search_use_regexp'};
1135
1136         our $searchtext = $input_params{'searchtext'};
1137         our $search_regexp = undef;
1138         if (defined $searchtext) {
1139                 if (length($searchtext) < 2) {
1140                         die_error(403, "At least two characters are required for search parameter");
1141                 }
1142                 if ($search_use_regexp) {
1143                         $search_regexp = $searchtext;
1144                         if (!eval { qr/$search_regexp/; 1; }) {
1145                                 (my $error = $@) =~ s/ at \S+ line \d+.*\n?//;
1146                                 die_error(400, "Invalid search regexp '$search_regexp'",
1147                                           esc_html($error));
1148                         }
1149                 } else {
1150                         $search_regexp = quotemeta $searchtext;
1151                 }
1152         }
1153 }
1154
1155 # path to the current git repository
1156 our $git_dir;
1157 sub evaluate_git_dir {
1158         our $git_dir = "$projectroot/$project" if $project;
1159 }
1160
1161 our (@snapshot_fmts, $git_avatar, @extra_branch_refs);
1162 sub configure_gitweb_features {
1163         # list of supported snapshot formats
1164         our @snapshot_fmts = gitweb_get_feature('snapshot');
1165         @snapshot_fmts = filter_snapshot_fmts(@snapshot_fmts);
1166
1167         # check that the avatar feature is set to a known provider name,
1168         # and for each provider check if the dependencies are satisfied.
1169         # if the provider name is invalid or the dependencies are not met,
1170         # reset $git_avatar to the empty string.
1171         our ($git_avatar) = gitweb_get_feature('avatar');
1172         if ($git_avatar eq 'gravatar') {
1173                 $git_avatar = '' unless (eval { require Digest::MD5; 1; });
1174         } elsif ($git_avatar eq 'picon') {
1175                 # no dependencies
1176         } else {
1177                 $git_avatar = '';
1178         }
1179
1180         our @extra_branch_refs = gitweb_get_feature('extra-branch-refs');
1181         @extra_branch_refs = filter_and_validate_refs (@extra_branch_refs);
1182 }
1183
1184 sub get_branch_refs {
1185         return ('heads', @extra_branch_refs);
1186 }
1187
1188 # custom error handler: 'die <message>' is Internal Server Error
1189 sub handle_errors_html {
1190         my $msg = shift; # it is already HTML escaped
1191
1192         # to avoid infinite loop where error occurs in die_error,
1193         # change handler to default handler, disabling handle_errors_html
1194         set_message("Error occurred when inside die_error:\n$msg");
1195
1196         # you cannot jump out of die_error when called as error handler;
1197         # the subroutine set via CGI::Carp::set_message is called _after_
1198         # HTTP headers are already written, so it cannot write them itself
1199         die_error(undef, undef, $msg, -error_handler => 1, -no_http_header => 1);
1200 }
1201 set_message(\&handle_errors_html);
1202
1203 # dispatch
1204 sub dispatch {
1205         if (!defined $action) {
1206                 if (defined $hash) {
1207                         $action = git_get_type($hash);
1208                         $action or die_error(404, "Object does not exist");
1209                 } elsif (defined $hash_base && defined $file_name) {
1210                         $action = git_get_type("$hash_base:$file_name");
1211                         $action or die_error(404, "File or directory does not exist");
1212                 } elsif (defined $project) {
1213                         $action = 'summary';
1214                 } else {
1215                         $action = 'project_list';
1216                 }
1217         }
1218         if (!defined($actions{$action})) {
1219                 die_error(400, "Unknown action");
1220         }
1221         if ($action !~ m/^(?:opml|project_list|project_index)$/ &&
1222             !$project) {
1223                 die_error(400, "Project needed");
1224         }
1225         $actions{$action}->();
1226 }
1227
1228 sub reset_timer {
1229         our $t0 = [ gettimeofday() ]
1230                 if defined $t0;
1231         our $number_of_git_cmds = 0;
1232 }
1233
1234 our $first_request = 1;
1235 sub run_request {
1236         reset_timer();
1237
1238         evaluate_uri();
1239         if ($first_request) {
1240                 evaluate_gitweb_config();
1241                 evaluate_git_version();
1242         }
1243         if ($per_request_config) {
1244                 if (ref($per_request_config) eq 'CODE') {
1245                         $per_request_config->();
1246                 } elsif (!$first_request) {
1247                         evaluate_gitweb_config();
1248                 }
1249         }
1250         check_loadavg();
1251
1252         # $projectroot and $projects_list might be set in gitweb config file
1253         $projects_list ||= $projectroot;
1254
1255         evaluate_query_params();
1256         evaluate_path_info();
1257         evaluate_and_validate_params();
1258         evaluate_git_dir();
1259
1260         configure_gitweb_features();
1261
1262         dispatch();
1263 }
1264
1265 our $is_last_request = sub { 1 };
1266 our ($pre_dispatch_hook, $post_dispatch_hook, $pre_listen_hook);
1267 our $CGI = 'CGI';
1268 our $cgi;
1269 sub configure_as_fcgi {
1270         require CGI::Fast;
1271         our $CGI = 'CGI::Fast';
1272
1273         my $request_number = 0;
1274         # let each child service 100 requests
1275         our $is_last_request = sub { ++$request_number > 100 };
1276 }
1277 sub evaluate_argv {
1278         my $script_name = $ENV{'SCRIPT_NAME'} || $ENV{'SCRIPT_FILENAME'} || __FILE__;
1279         configure_as_fcgi()
1280                 if $script_name =~ /\.fcgi$/;
1281
1282         return unless (@ARGV);
1283
1284         require Getopt::Long;
1285         Getopt::Long::GetOptions(
1286                 'fastcgi|fcgi|f' => \&configure_as_fcgi,
1287                 'nproc|n=i' => sub {
1288                         my ($arg, $val) = @_;
1289                         return unless eval { require FCGI::ProcManager; 1; };
1290                         my $proc_manager = FCGI::ProcManager->new({
1291                                 n_processes => $val,
1292                         });
1293                         our $pre_listen_hook    = sub { $proc_manager->pm_manage()        };
1294                         our $pre_dispatch_hook  = sub { $proc_manager->pm_pre_dispatch()  };
1295                         our $post_dispatch_hook = sub { $proc_manager->pm_post_dispatch() };
1296                 },
1297         );
1298 }
1299
1300 sub run {
1301         evaluate_argv();
1302
1303         $first_request = 1;
1304         $pre_listen_hook->()
1305                 if $pre_listen_hook;
1306
1307  REQUEST:
1308         while ($cgi = $CGI->new()) {
1309                 $pre_dispatch_hook->()
1310                         if $pre_dispatch_hook;
1311
1312                 run_request();
1313
1314                 $post_dispatch_hook->()
1315                         if $post_dispatch_hook;
1316                 $first_request = 0;
1317
1318                 last REQUEST if ($is_last_request->());
1319         }
1320
1321  DONE_GITWEB:
1322         1;
1323 }
1324
1325 run();
1326
1327 if (defined caller) {
1328         # wrapped in a subroutine processing requests,
1329         # e.g. mod_perl with ModPerl::Registry, or PSGI with Plack::App::WrapCGI
1330         return;
1331 } else {
1332         # pure CGI script, serving single request
1333         exit;
1334 }
1335
1336 ## ======================================================================
1337 ## action links
1338
1339 # possible values of extra options
1340 # -full => 0|1      - use absolute/full URL ($my_uri/$my_url as base)
1341 # -replay => 1      - start from a current view (replay with modifications)
1342 # -path_info => 0|1 - don't use/use path_info URL (if possible)
1343 # -anchor => ANCHOR - add #ANCHOR to end of URL, implies -replay if used alone
1344 sub href {
1345         my %params = @_;
1346         # default is to use -absolute url() i.e. $my_uri
1347         my $href = $params{-full} ? $my_url : $my_uri;
1348
1349         # implicit -replay, must be first of implicit params
1350         $params{-replay} = 1 if (keys %params == 1 && $params{-anchor});
1351
1352         $params{'project'} = $project unless exists $params{'project'};
1353
1354         if ($params{-replay}) {
1355                 while (my ($name, $symbol) = each %cgi_param_mapping) {
1356                         if (!exists $params{$name}) {
1357                                 $params{$name} = $input_params{$name};
1358                         }
1359                 }
1360         }
1361
1362         my $use_pathinfo = gitweb_check_feature('pathinfo');
1363         if (defined $params{'project'} &&
1364             (exists $params{-path_info} ? $params{-path_info} : $use_pathinfo)) {
1365                 # try to put as many parameters as possible in PATH_INFO:
1366                 #   - project name
1367                 #   - action
1368                 #   - hash_parent or hash_parent_base:/file_parent
1369                 #   - hash or hash_base:/filename
1370                 #   - the snapshot_format as an appropriate suffix
1371
1372                 # When the script is the root DirectoryIndex for the domain,
1373                 # $href here would be something like http://gitweb.example.com/
1374                 # Thus, we strip any trailing / from $href, to spare us double
1375                 # slashes in the final URL
1376                 $href =~ s,/$,,;
1377
1378                 # Then add the project name, if present
1379                 $href .= "/".esc_path_info($params{'project'});
1380                 delete $params{'project'};
1381
1382                 # since we destructively absorb parameters, we keep this
1383                 # boolean that remembers if we're handling a snapshot
1384                 my $is_snapshot = $params{'action'} eq 'snapshot';
1385
1386                 # Summary just uses the project path URL, any other action is
1387                 # added to the URL
1388                 if (defined $params{'action'}) {
1389                         $href .= "/".esc_path_info($params{'action'})
1390                                 unless $params{'action'} eq 'summary';
1391                         delete $params{'action'};
1392                 }
1393
1394                 # Next, we put hash_parent_base:/file_parent..hash_base:/file_name,
1395                 # stripping nonexistent or useless pieces
1396                 $href .= "/" if ($params{'hash_base'} || $params{'hash_parent_base'}
1397                         || $params{'hash_parent'} || $params{'hash'});
1398                 if (defined $params{'hash_base'}) {
1399                         if (defined $params{'hash_parent_base'}) {
1400                                 $href .= esc_path_info($params{'hash_parent_base'});
1401                                 # skip the file_parent if it's the same as the file_name
1402                                 if (defined $params{'file_parent'}) {
1403                                         if (defined $params{'file_name'} && $params{'file_parent'} eq $params{'file_name'}) {
1404                                                 delete $params{'file_parent'};
1405                                         } elsif ($params{'file_parent'} !~ /\.\./) {
1406                                                 $href .= ":/".esc_path_info($params{'file_parent'});
1407                                                 delete $params{'file_parent'};
1408                                         }
1409                                 }
1410                                 $href .= "..";
1411                                 delete $params{'hash_parent'};
1412                                 delete $params{'hash_parent_base'};
1413                         } elsif (defined $params{'hash_parent'}) {
1414                                 $href .= esc_path_info($params{'hash_parent'}). "..";
1415                                 delete $params{'hash_parent'};
1416                         }
1417
1418                         $href .= esc_path_info($params{'hash_base'});
1419                         if (defined $params{'file_name'} && $params{'file_name'} !~ /\.\./) {
1420                                 $href .= ":/".esc_path_info($params{'file_name'});
1421                                 delete $params{'file_name'};
1422                         }
1423                         delete $params{'hash'};
1424                         delete $params{'hash_base'};
1425                 } elsif (defined $params{'hash'}) {
1426                         $href .= esc_path_info($params{'hash'});
1427                         delete $params{'hash'};
1428                 }
1429
1430                 # If the action was a snapshot, we can absorb the
1431                 # snapshot_format parameter too
1432                 if ($is_snapshot) {
1433                         my $fmt = $params{'snapshot_format'};
1434                         # snapshot_format should always be defined when href()
1435                         # is called, but just in case some code forgets, we
1436                         # fall back to the default
1437                         $fmt ||= $snapshot_fmts[0];
1438                         $href .= $known_snapshot_formats{$fmt}{'suffix'};
1439                         delete $params{'snapshot_format'};
1440                 }
1441         }
1442
1443         # now encode the parameters explicitly
1444         my @result = ();
1445         for (my $i = 0; $i < @cgi_param_mapping; $i += 2) {
1446                 my ($name, $symbol) = ($cgi_param_mapping[$i], $cgi_param_mapping[$i+1]);
1447                 if (defined $params{$name}) {
1448                         if (ref($params{$name}) eq "ARRAY") {
1449                                 foreach my $par (@{$params{$name}}) {
1450                                         push @result, $symbol . "=" . esc_param($par);
1451                                 }
1452                         } else {
1453                                 push @result, $symbol . "=" . esc_param($params{$name});
1454                         }
1455                 }
1456         }
1457         $href .= "?" . join(';', @result) if scalar @result;
1458
1459         # final transformation: trailing spaces must be escaped (URI-encoded)
1460         $href =~ s/(\s+)$/CGI::escape($1)/e;
1461
1462         if ($params{-anchor}) {
1463                 $href .= "#".esc_param($params{-anchor});
1464         }
1465
1466         return $href;
1467 }
1468
1469
1470 ## ======================================================================
1471 ## validation, quoting/unquoting and escaping
1472
1473 sub is_valid_action {
1474         my $input = shift;
1475         return undef unless exists $actions{$input};
1476         return 1;
1477 }
1478
1479 sub is_valid_project {
1480         my $input = shift;
1481
1482         return unless defined $input;
1483         if (!is_valid_pathname($input) ||
1484                 !(-d "$projectroot/$input") ||
1485                 !check_export_ok("$projectroot/$input") ||
1486                 ($strict_export && !project_in_list($input))) {
1487                 return undef;
1488         } else {
1489                 return 1;
1490         }
1491 }
1492
1493 sub is_valid_pathname {
1494         my $input = shift;
1495
1496         return undef unless defined $input;
1497         # no '.' or '..' as elements of path, i.e. no '.' or '..'
1498         # at the beginning, at the end, and between slashes.
1499         # also this catches doubled slashes
1500         if ($input =~ m!(^|/)(|\.|\.\.)(/|$)!) {
1501                 return undef;
1502         }
1503         # no null characters
1504         if ($input =~ m!\0!) {
1505                 return undef;
1506         }
1507         return 1;
1508 }
1509
1510 sub is_valid_ref_format {
1511         my $input = shift;
1512
1513         return undef unless defined $input;
1514         # restrictions on ref name according to git-check-ref-format
1515         if ($input =~ m!(/\.|\.\.|[\000-\040\177 ~^:?*\[]|/$)!) {
1516                 return undef;
1517         }
1518         return 1;
1519 }
1520
1521 sub is_valid_refname {
1522         my $input = shift;
1523
1524         return undef unless defined $input;
1525         # textual hashes are O.K.
1526         if ($input =~ m/^[0-9a-fA-F]{40}$/) {
1527                 return 1;
1528         }
1529         # it must be correct pathname
1530         is_valid_pathname($input) or return undef;
1531         # check git-check-ref-format restrictions
1532         is_valid_ref_format($input) or return undef;
1533         return 1;
1534 }
1535
1536 # decode sequences of octets in utf8 into Perl's internal form,
1537 # which is utf-8 with utf8 flag set if needed.  gitweb writes out
1538 # in utf-8 thanks to "binmode STDOUT, ':utf8'" at beginning
1539 sub to_utf8 {
1540         my $str = shift;
1541         return undef unless defined $str;
1542
1543         if (utf8::is_utf8($str) || utf8::decode($str)) {
1544                 return $str;
1545         } else {
1546                 return decode($fallback_encoding, $str, Encode::FB_DEFAULT);
1547         }
1548 }
1549
1550 # quote unsafe chars, but keep the slash, even when it's not
1551 # correct, but quoted slashes look too horrible in bookmarks
1552 sub esc_param {
1553         my $str = shift;
1554         return undef unless defined $str;
1555         $str =~ s/([^A-Za-z0-9\-_.~()\/:@ ]+)/CGI::escape($1)/eg;
1556         $str =~ s/ /\+/g;
1557         return $str;
1558 }
1559
1560 # the quoting rules for path_info fragment are slightly different
1561 sub esc_path_info {
1562         my $str = shift;
1563         return undef unless defined $str;
1564
1565         # path_info doesn't treat '+' as space (specially), but '?' must be escaped
1566         $str =~ s/([^A-Za-z0-9\-_.~();\/;:@&= +]+)/CGI::escape($1)/eg;
1567
1568         return $str;
1569 }
1570
1571 # quote unsafe chars in whole URL, so some characters cannot be quoted
1572 sub esc_url {
1573         my $str = shift;
1574         return undef unless defined $str;
1575         $str =~ s/([^A-Za-z0-9\-_.~();\/;?:@&= ]+)/CGI::escape($1)/eg;
1576         $str =~ s/ /\+/g;
1577         return $str;
1578 }
1579
1580 # quote unsafe characters in HTML attributes
1581 sub esc_attr {
1582
1583         # for XHTML conformance escaping '"' to '&quot;' is not enough
1584         return esc_html(@_);
1585 }
1586
1587 # replace invalid utf8 character with SUBSTITUTION sequence
1588 sub esc_html {
1589         my $str = shift;
1590         my %opts = @_;
1591
1592         return undef unless defined $str;
1593
1594         $str = to_utf8($str);
1595         $str = $cgi->escapeHTML($str);
1596         if ($opts{'-nbsp'}) {
1597                 $str =~ s/ /&nbsp;/g;
1598         }
1599         $str =~ s|([[:cntrl:]])|(($1 ne "\t") ? quot_cec($1) : $1)|eg;
1600         return $str;
1601 }
1602
1603 # quote control characters and escape filename to HTML
1604 sub esc_path {
1605         my $str = shift;
1606         my %opts = @_;
1607
1608         return undef unless defined $str;
1609
1610         $str = to_utf8($str);
1611         $str = $cgi->escapeHTML($str);
1612         if ($opts{'-nbsp'}) {
1613                 $str =~ s/ /&nbsp;/g;
1614         }
1615         $str =~ s|([[:cntrl:]])|quot_cec($1)|eg;
1616         return $str;
1617 }
1618
1619 # Sanitize for use in XHTML + application/xml+xhtm (valid XML 1.0)
1620 sub sanitize {
1621         my $str = shift;
1622
1623         return undef unless defined $str;
1624
1625         $str = to_utf8($str);
1626         $str =~ s|([[:cntrl:]])|(index("\t\n\r", $1) != -1 ? $1 : quot_cec($1))|eg;
1627         return $str;
1628 }
1629
1630 # Make control characters "printable", using character escape codes (CEC)
1631 sub quot_cec {
1632         my $cntrl = shift;
1633         my %opts = @_;
1634         my %es = ( # character escape codes, aka escape sequences
1635                 "\t" => '\t',   # tab            (HT)
1636                 "\n" => '\n',   # line feed      (LF)
1637                 "\r" => '\r',   # carrige return (CR)
1638                 "\f" => '\f',   # form feed      (FF)
1639                 "\b" => '\b',   # backspace      (BS)
1640                 "\a" => '\a',   # alarm (bell)   (BEL)
1641                 "\e" => '\e',   # escape         (ESC)
1642                 "\013" => '\v', # vertical tab   (VT)
1643                 "\000" => '\0', # nul character  (NUL)
1644         );
1645         my $chr = ( (exists $es{$cntrl})
1646                     ? $es{$cntrl}
1647                     : sprintf('\%2x', ord($cntrl)) );
1648         if ($opts{-nohtml}) {
1649                 return $chr;
1650         } else {
1651                 return "<span class=\"cntrl\">$chr</span>";
1652         }
1653 }
1654
1655 # Alternatively use unicode control pictures codepoints,
1656 # Unicode "printable representation" (PR)
1657 sub quot_upr {
1658         my $cntrl = shift;
1659         my %opts = @_;
1660
1661         my $chr = sprintf('&#%04d;', 0x2400+ord($cntrl));
1662         if ($opts{-nohtml}) {
1663                 return $chr;
1664         } else {
1665                 return "<span class=\"cntrl\">$chr</span>";
1666         }
1667 }
1668
1669 # git may return quoted and escaped filenames
1670 sub unquote {
1671         my $str = shift;
1672
1673         sub unq {
1674                 my $seq = shift;
1675                 my %es = ( # character escape codes, aka escape sequences
1676                         't' => "\t",   # tab            (HT, TAB)
1677                         'n' => "\n",   # newline        (NL)
1678                         'r' => "\r",   # return         (CR)
1679                         'f' => "\f",   # form feed      (FF)
1680                         'b' => "\b",   # backspace      (BS)
1681                         'a' => "\a",   # alarm (bell)   (BEL)
1682                         'e' => "\e",   # escape         (ESC)
1683                         'v' => "\013", # vertical tab   (VT)
1684                 );
1685
1686                 if ($seq =~ m/^[0-7]{1,3}$/) {
1687                         # octal char sequence
1688                         return chr(oct($seq));
1689                 } elsif (exists $es{$seq}) {
1690                         # C escape sequence, aka character escape code
1691                         return $es{$seq};
1692                 }
1693                 # quoted ordinary character
1694                 return $seq;
1695         }
1696
1697         if ($str =~ m/^"(.*)"$/) {
1698                 # needs unquoting
1699                 $str = $1;
1700                 $str =~ s/\\([^0-7]|[0-7]{1,3})/unq($1)/eg;
1701         }
1702         return $str;
1703 }
1704
1705 # escape tabs (convert tabs to spaces)
1706 sub untabify {
1707         my $line = shift;
1708
1709         while ((my $pos = index($line, "\t")) != -1) {
1710                 if (my $count = (8 - ($pos % 8))) {
1711                         my $spaces = ' ' x $count;
1712                         $line =~ s/\t/$spaces/;
1713                 }
1714         }
1715
1716         return $line;
1717 }
1718
1719 sub project_in_list {
1720         my $project = shift;
1721         my @list = git_get_projects_list();
1722         return @list && scalar(grep { $_->{'path'} eq $project } @list);
1723 }
1724
1725 ## ----------------------------------------------------------------------
1726 ## HTML aware string manipulation
1727
1728 # Try to chop given string on a word boundary between position
1729 # $len and $len+$add_len. If there is no word boundary there,
1730 # chop at $len+$add_len. Do not chop if chopped part plus ellipsis
1731 # (marking chopped part) would be longer than given string.
1732 sub chop_str {
1733         my $str = shift;
1734         my $len = shift;
1735         my $add_len = shift || 10;
1736         my $where = shift || 'right'; # 'left' | 'center' | 'right'
1737
1738         # Make sure perl knows it is utf8 encoded so we don't
1739         # cut in the middle of a utf8 multibyte char.
1740         $str = to_utf8($str);
1741
1742         # allow only $len chars, but don't cut a word if it would fit in $add_len
1743         # if it doesn't fit, cut it if it's still longer than the dots we would add
1744         # remove chopped character entities entirely
1745
1746         # when chopping in the middle, distribute $len into left and right part
1747         # return early if chopping wouldn't make string shorter
1748         if ($where eq 'center') {
1749                 return $str if ($len + 5 >= length($str)); # filler is length 5
1750                 $len = int($len/2);
1751         } else {
1752                 return $str if ($len + 4 >= length($str)); # filler is length 4
1753         }
1754
1755         # regexps: ending and beginning with word part up to $add_len
1756         my $endre = qr/.{$len}\w{0,$add_len}/;
1757         my $begre = qr/\w{0,$add_len}.{$len}/;
1758
1759         if ($where eq 'left') {
1760                 $str =~ m/^(.*?)($begre)$/;
1761                 my ($lead, $body) = ($1, $2);
1762                 if (length($lead) > 4) {
1763                         $lead = " ...";
1764                 }
1765                 return "$lead$body";
1766
1767         } elsif ($where eq 'center') {
1768                 $str =~ m/^($endre)(.*)$/;
1769                 my ($left, $str)  = ($1, $2);
1770                 $str =~ m/^(.*?)($begre)$/;
1771                 my ($mid, $right) = ($1, $2);
1772                 if (length($mid) > 5) {
1773                         $mid = " ... ";
1774                 }
1775                 return "$left$mid$right";
1776
1777         } else {
1778                 $str =~ m/^($endre)(.*)$/;
1779                 my $body = $1;
1780                 my $tail = $2;
1781                 if (length($tail) > 4) {
1782                         $tail = "... ";
1783                 }
1784                 return "$body$tail";
1785         }
1786 }
1787
1788 # takes the same arguments as chop_str, but also wraps a <span> around the
1789 # result with a title attribute if it does get chopped. Additionally, the
1790 # string is HTML-escaped.
1791 sub chop_and_escape_str {
1792         my ($str) = @_;
1793
1794         my $chopped = chop_str(@_);
1795         $str = to_utf8($str);
1796         if ($chopped eq $str) {
1797                 return esc_html($chopped);
1798         } else {
1799                 $str =~ s/[[:cntrl:]]/?/g;
1800                 return $cgi->span({-title=>$str}, esc_html($chopped));
1801         }
1802 }
1803
1804 # Highlight selected fragments of string, using given CSS class,
1805 # and escape HTML.  It is assumed that fragments do not overlap.
1806 # Regions are passed as list of pairs (array references).
1807 #
1808 # Example: esc_html_hl_regions("foobar", "mark", [ 0, 3 ]) returns
1809 # '<span class="mark">foo</span>bar'
1810 sub esc_html_hl_regions {
1811         my ($str, $css_class, @sel) = @_;
1812         my %opts = grep { ref($_) ne 'ARRAY' } @sel;
1813         @sel     = grep { ref($_) eq 'ARRAY' } @sel;
1814         return esc_html($str, %opts) unless @sel;
1815
1816         my $out = '';
1817         my $pos = 0;
1818
1819         for my $s (@sel) {
1820                 my ($begin, $end) = @$s;
1821
1822                 # Don't create empty <span> elements.
1823                 next if $end <= $begin;
1824
1825                 my $escaped = esc_html(substr($str, $begin, $end - $begin),
1826                                        %opts);
1827
1828                 $out .= esc_html(substr($str, $pos, $begin - $pos), %opts)
1829                         if ($begin - $pos > 0);
1830                 $out .= $cgi->span({-class => $css_class}, $escaped);
1831
1832                 $pos = $end;
1833         }
1834         $out .= esc_html(substr($str, $pos), %opts)
1835                 if ($pos < length($str));
1836
1837         return $out;
1838 }
1839
1840 # return positions of beginning and end of each match
1841 sub matchpos_list {
1842         my ($str, $regexp) = @_;
1843         return unless (defined $str && defined $regexp);
1844
1845         my @matches;
1846         while ($str =~ /$regexp/g) {
1847                 push @matches, [$-[0], $+[0]];
1848         }
1849         return @matches;
1850 }
1851
1852 # highlight match (if any), and escape HTML
1853 sub esc_html_match_hl {
1854         my ($str, $regexp) = @_;
1855         return esc_html($str) unless defined $regexp;
1856
1857         my @matches = matchpos_list($str, $regexp);
1858         return esc_html($str) unless @matches;
1859
1860         return esc_html_hl_regions($str, 'match', @matches);
1861 }
1862
1863
1864 # highlight match (if any) of shortened string, and escape HTML
1865 sub esc_html_match_hl_chopped {
1866         my ($str, $chopped, $regexp) = @_;
1867         return esc_html_match_hl($str, $regexp) unless defined $chopped;
1868
1869         my @matches = matchpos_list($str, $regexp);
1870         return esc_html($chopped) unless @matches;
1871
1872         # filter matches so that we mark chopped string
1873         my $tail = "... "; # see chop_str
1874         unless ($chopped =~ s/\Q$tail\E$//) {
1875                 $tail = '';
1876         }
1877         my $chop_len = length($chopped);
1878         my $tail_len = length($tail);
1879         my @filtered;
1880
1881         for my $m (@matches) {
1882                 if ($m->[0] > $chop_len) {
1883                         push @filtered, [ $chop_len, $chop_len + $tail_len ] if ($tail_len > 0);
1884                         last;
1885                 } elsif ($m->[1] > $chop_len) {
1886                         push @filtered, [ $m->[0], $chop_len + $tail_len ];
1887                         last;
1888                 }
1889                 push @filtered, $m;
1890         }
1891
1892         return esc_html_hl_regions($chopped . $tail, 'match', @filtered);
1893 }
1894
1895 ## ----------------------------------------------------------------------
1896 ## functions returning short strings
1897
1898 # CSS class for given age value (in seconds)
1899 sub age_class {
1900         my $age = shift;
1901
1902         if (!defined $age) {
1903                 return "noage";
1904         } elsif ($age < 60*60*2) {
1905                 return "age0";
1906         } elsif ($age < 60*60*24*2) {
1907                 return "age1";
1908         } else {
1909                 return "age2";
1910         }
1911 }
1912
1913 # convert age in seconds to "nn units ago" string
1914 sub age_string {
1915         my $age = shift;
1916         my $age_str;
1917
1918         if ($age > 60*60*24*365*2) {
1919                 $age_str = (int $age/60/60/24/365);
1920                 $age_str .= " years ago";
1921         } elsif ($age > 60*60*24*(365/12)*2) {
1922                 $age_str = int $age/60/60/24/(365/12);
1923                 $age_str .= " months ago";
1924         } elsif ($age > 60*60*24*7*2) {
1925                 $age_str = int $age/60/60/24/7;
1926                 $age_str .= " weeks ago";
1927         } elsif ($age > 60*60*24*2) {
1928                 $age_str = int $age/60/60/24;
1929                 $age_str .= " days ago";
1930         } elsif ($age > 60*60*2) {
1931                 $age_str = int $age/60/60;
1932                 $age_str .= " hours ago";
1933         } elsif ($age > 60*2) {
1934                 $age_str = int $age/60;
1935                 $age_str .= " min ago";
1936         } elsif ($age > 2) {
1937                 $age_str = int $age;
1938                 $age_str .= " sec ago";
1939         } else {
1940                 $age_str .= " right now";
1941         }
1942         return $age_str;
1943 }
1944
1945 use constant {
1946         S_IFINVALID => 0030000,
1947         S_IFGITLINK => 0160000,
1948 };
1949
1950 # submodule/subproject, a commit object reference
1951 sub S_ISGITLINK {
1952         my $mode = shift;
1953
1954         return (($mode & S_IFMT) == S_IFGITLINK)
1955 }
1956
1957 # convert file mode in octal to symbolic file mode string
1958 sub mode_str {
1959         my $mode = oct shift;
1960
1961         if (S_ISGITLINK($mode)) {
1962                 return 'm---------';
1963         } elsif (S_ISDIR($mode & S_IFMT)) {
1964                 return 'drwxr-xr-x';
1965         } elsif (S_ISLNK($mode)) {
1966                 return 'lrwxrwxrwx';
1967         } elsif (S_ISREG($mode)) {
1968                 # git cares only about the executable bit
1969                 if ($mode & S_IXUSR) {
1970                         return '-rwxr-xr-x';
1971                 } else {
1972                         return '-rw-r--r--';
1973                 };
1974         } else {
1975                 return '----------';
1976         }
1977 }
1978
1979 # convert file mode in octal to file type string
1980 sub file_type {
1981         my $mode = shift;
1982
1983         if ($mode !~ m/^[0-7]+$/) {
1984                 return $mode;
1985         } else {
1986                 $mode = oct $mode;
1987         }
1988
1989         if (S_ISGITLINK($mode)) {
1990                 return "submodule";
1991         } elsif (S_ISDIR($mode & S_IFMT)) {
1992                 return "directory";
1993         } elsif (S_ISLNK($mode)) {
1994                 return "symlink";
1995         } elsif (S_ISREG($mode)) {
1996                 return "file";
1997         } else {
1998                 return "unknown";
1999         }
2000 }
2001
2002 # convert file mode in octal to file type description string
2003 sub file_type_long {
2004         my $mode = shift;
2005
2006         if ($mode !~ m/^[0-7]+$/) {
2007                 return $mode;
2008         } else {
2009                 $mode = oct $mode;
2010         }
2011
2012         if (S_ISGITLINK($mode)) {
2013                 return "submodule";
2014         } elsif (S_ISDIR($mode & S_IFMT)) {
2015                 return "directory";
2016         } elsif (S_ISLNK($mode)) {
2017                 return "symlink";
2018         } elsif (S_ISREG($mode)) {
2019                 if ($mode & S_IXUSR) {
2020                         return "executable";
2021                 } else {
2022                         return "file";
2023                 };
2024         } else {
2025                 return "unknown";
2026         }
2027 }
2028
2029
2030 ## ----------------------------------------------------------------------
2031 ## functions returning short HTML fragments, or transforming HTML fragments
2032 ## which don't belong to other sections
2033
2034 # format line of commit message.
2035 sub format_log_line_html {
2036         my $line = shift;
2037
2038         $line = esc_html($line, -nbsp=>1);
2039         $line =~ s{\b([0-9a-fA-F]{8,40})\b}{
2040                 $cgi->a({-href => href(action=>"object", hash=>$1),
2041                                         -class => "text"}, $1);
2042         }eg;
2043
2044         return $line;
2045 }
2046
2047 # format marker of refs pointing to given object
2048
2049 # the destination action is chosen based on object type and current context:
2050 # - for annotated tags, we choose the tag view unless it's the current view
2051 #   already, in which case we go to shortlog view
2052 # - for other refs, we keep the current view if we're in history, shortlog or
2053 #   log view, and select shortlog otherwise
2054 sub format_ref_marker {
2055         my ($refs, $id) = @_;
2056         my $markers = '';
2057
2058         if (defined $refs->{$id}) {
2059                 foreach my $ref (@{$refs->{$id}}) {
2060                         # this code exploits the fact that non-lightweight tags are the
2061                         # only indirect objects, and that they are the only objects for which
2062                         # we want to use tag instead of shortlog as action
2063                         my ($type, $name) = qw();
2064                         my $indirect = ($ref =~ s/\^\{\}$//);
2065                         # e.g. tags/v2.6.11 or heads/next
2066                         if ($ref =~ m!^(.*?)s?/(.*)$!) {
2067                                 $type = $1;
2068                                 $name = $2;
2069                         } else {
2070                                 $type = "ref";
2071                                 $name = $ref;
2072                         }
2073
2074                         my $class = $type;
2075                         $class .= " indirect" if $indirect;
2076
2077                         my $dest_action = "shortlog";
2078
2079                         if ($indirect) {
2080                                 $dest_action = "tag" unless $action eq "tag";
2081                         } elsif ($action =~ /^(history|(short)?log)$/) {
2082                                 $dest_action = $action;
2083                         }
2084
2085                         my $dest = "";
2086                         $dest .= "refs/" unless $ref =~ m!^refs/!;
2087                         $dest .= $ref;
2088
2089                         my $link = $cgi->a({
2090                                 -href => href(
2091                                         action=>$dest_action,
2092                                         hash=>$dest
2093                                 )}, $name);
2094
2095                         $markers .= " <span class=\"".esc_attr($class)."\" title=\"".esc_attr($ref)."\">" .
2096                                 $link . "</span>";
2097                 }
2098         }
2099
2100         if ($markers) {
2101                 return ' <span class="refs">'. $markers . '</span>';
2102         } else {
2103                 return "";
2104         }
2105 }
2106
2107 # format, perhaps shortened and with markers, title line
2108 sub format_subject_html {
2109         my ($long, $short, $href, $extra) = @_;
2110         $extra = '' unless defined($extra);
2111
2112         if (length($short) < length($long)) {
2113                 $long =~ s/[[:cntrl:]]/?/g;
2114                 return $cgi->a({-href => $href, -class => "list subject",
2115                                 -title => to_utf8($long)},
2116                        esc_html($short)) . $extra;
2117         } else {
2118                 return $cgi->a({-href => $href, -class => "list subject"},
2119                        esc_html($long)) . $extra;
2120         }
2121 }
2122
2123 # Rather than recomputing the url for an email multiple times, we cache it
2124 # after the first hit. This gives a visible benefit in views where the avatar
2125 # for the same email is used repeatedly (e.g. shortlog).
2126 # The cache is shared by all avatar engines (currently gravatar only), which
2127 # are free to use it as preferred. Since only one avatar engine is used for any
2128 # given page, there's no risk for cache conflicts.
2129 our %avatar_cache = ();
2130
2131 # Compute the picon url for a given email, by using the picon search service over at
2132 # http://www.cs.indiana.edu/picons/search.html
2133 sub picon_url {
2134         my $email = lc shift;
2135         if (!$avatar_cache{$email}) {
2136                 my ($user, $domain) = split('@', $email);
2137                 $avatar_cache{$email} =
2138                         "//www.cs.indiana.edu/cgi-pub/kinzler/piconsearch.cgi/" .
2139                         "$domain/$user/" .
2140                         "users+domains+unknown/up/single";
2141         }
2142         return $avatar_cache{$email};
2143 }
2144
2145 # Compute the gravatar url for a given email, if it's not in the cache already.
2146 # Gravatar stores only the part of the URL before the size, since that's the
2147 # one computationally more expensive. This also allows reuse of the cache for
2148 # different sizes (for this particular engine).
2149 sub gravatar_url {
2150         my $email = lc shift;
2151         my $size = shift;
2152         $avatar_cache{$email} ||=
2153                 "//www.gravatar.com/avatar/" .
2154                         Digest::MD5::md5_hex($email) . "?s=";
2155         return $avatar_cache{$email} . $size;
2156 }
2157
2158 # Insert an avatar for the given $email at the given $size if the feature
2159 # is enabled.
2160 sub git_get_avatar {
2161         my ($email, %opts) = @_;
2162         my $pre_white  = ($opts{-pad_before} ? "&nbsp;" : "");
2163         my $post_white = ($opts{-pad_after}  ? "&nbsp;" : "");
2164         $opts{-size} ||= 'default';
2165         my $size = $avatar_size{$opts{-size}} || $avatar_size{'default'};
2166         my $url = "";
2167         if ($git_avatar eq 'gravatar') {
2168                 $url = gravatar_url($email, $size);
2169         } elsif ($git_avatar eq 'picon') {
2170                 $url = picon_url($email);
2171         }
2172         # Other providers can be added by extending the if chain, defining $url
2173         # as needed. If no variant puts something in $url, we assume avatars
2174         # are completely disabled/unavailable.
2175         if ($url) {
2176                 return $pre_white .
2177                        "<img width=\"$size\" " .
2178                             "class=\"avatar\" " .
2179                             "src=\"".esc_url($url)."\" " .
2180                             "alt=\"\" " .
2181                        "/>" . $post_white;
2182         } else {
2183                 return "";
2184         }
2185 }
2186
2187 sub format_search_author {
2188         my ($author, $searchtype, $displaytext) = @_;
2189         my $have_search = gitweb_check_feature('search');
2190
2191         if ($have_search) {
2192                 my $performed = "";
2193                 if ($searchtype eq 'author') {
2194                         $performed = "authored";
2195                 } elsif ($searchtype eq 'committer') {
2196                         $performed = "committed";
2197                 }
2198
2199                 return $cgi->a({-href => href(action=>"search", hash=>$hash,
2200                                 searchtext=>$author,
2201                                 searchtype=>$searchtype), class=>"list",
2202                                 title=>"Search for commits $performed by $author"},
2203                                 $displaytext);
2204
2205         } else {
2206                 return $displaytext;
2207         }
2208 }
2209
2210 # format the author name of the given commit with the given tag
2211 # the author name is chopped and escaped according to the other
2212 # optional parameters (see chop_str).
2213 sub format_author_html {
2214         my $tag = shift;
2215         my $co = shift;
2216         my $author = chop_and_escape_str($co->{'author_name'}, @_);
2217         return "<$tag class=\"author\">" .
2218                format_search_author($co->{'author_name'}, "author",
2219                        git_get_avatar($co->{'author_email'}, -pad_after => 1) .
2220                        $author) .
2221                "</$tag>";
2222 }
2223
2224 # format git diff header line, i.e. "diff --(git|combined|cc) ..."
2225 sub format_git_diff_header_line {
2226         my $line = shift;
2227         my $diffinfo = shift;
2228         my ($from, $to) = @_;
2229
2230         if ($diffinfo->{'nparents'}) {
2231                 # combined diff
2232                 $line =~ s!^(diff (.*?) )"?.*$!$1!;
2233                 if ($to->{'href'}) {
2234                         $line .= $cgi->a({-href => $to->{'href'}, -class => "path"},
2235                                          esc_path($to->{'file'}));
2236                 } else { # file was deleted (no href)
2237                         $line .= esc_path($to->{'file'});
2238                 }
2239         } else {
2240                 # "ordinary" diff
2241                 $line =~ s!^(diff (.*?) )"?a/.*$!$1!;
2242                 if ($from->{'href'}) {
2243                         $line .= $cgi->a({-href => $from->{'href'}, -class => "path"},
2244                                          'a/' . esc_path($from->{'file'}));
2245                 } else { # file was added (no href)
2246                         $line .= 'a/' . esc_path($from->{'file'});
2247                 }
2248                 $line .= ' ';
2249                 if ($to->{'href'}) {
2250                         $line .= $cgi->a({-href => $to->{'href'}, -class => "path"},
2251                                          'b/' . esc_path($to->{'file'}));
2252                 } else { # file was deleted
2253                         $line .= 'b/' . esc_path($to->{'file'});
2254                 }
2255         }
2256
2257         return "<div class=\"diff header\">$line</div>\n";
2258 }
2259
2260 # format extended diff header line, before patch itself
2261 sub format_extended_diff_header_line {
2262         my $line = shift;
2263         my $diffinfo = shift;
2264         my ($from, $to) = @_;
2265
2266         # match <path>
2267         if ($line =~ s!^((copy|rename) from ).*$!$1! && $from->{'href'}) {
2268                 $line .= $cgi->a({-href=>$from->{'href'}, -class=>"path"},
2269                                        esc_path($from->{'file'}));
2270         }
2271         if ($line =~ s!^((copy|rename) to ).*$!$1! && $to->{'href'}) {
2272                 $line .= $cgi->a({-href=>$to->{'href'}, -class=>"path"},
2273                                  esc_path($to->{'file'}));
2274         }
2275         # match single <mode>
2276         if ($line =~ m/\s(\d{6})$/) {
2277                 $line .= '<span class="info"> (' .
2278                          file_type_long($1) .
2279                          ')</span>';
2280         }
2281         # match <hash>
2282         if ($line =~ m/^index [0-9a-fA-F]{40},[0-9a-fA-F]{40}/) {
2283                 # can match only for combined diff
2284                 $line = 'index ';
2285                 for (my $i = 0; $i < $diffinfo->{'nparents'}; $i++) {
2286                         if ($from->{'href'}[$i]) {
2287                                 $line .= $cgi->a({-href=>$from->{'href'}[$i],
2288                                                   -class=>"hash"},
2289                                                  substr($diffinfo->{'from_id'}[$i],0,7));
2290                         } else {
2291                                 $line .= '0' x 7;
2292                         }
2293                         # separator
2294                         $line .= ',' if ($i < $diffinfo->{'nparents'} - 1);
2295                 }
2296                 $line .= '..';
2297                 if ($to->{'href'}) {
2298                         $line .= $cgi->a({-href=>$to->{'href'}, -class=>"hash"},
2299                                          substr($diffinfo->{'to_id'},0,7));
2300                 } else {
2301                         $line .= '0' x 7;
2302                 }
2303
2304         } elsif ($line =~ m/^index [0-9a-fA-F]{40}..[0-9a-fA-F]{40}/) {
2305                 # can match only for ordinary diff
2306                 my ($from_link, $to_link);
2307                 if ($from->{'href'}) {
2308                         $from_link = $cgi->a({-href=>$from->{'href'}, -class=>"hash"},
2309                                              substr($diffinfo->{'from_id'},0,7));
2310                 } else {
2311                         $from_link = '0' x 7;
2312                 }
2313                 if ($to->{'href'}) {
2314                         $to_link = $cgi->a({-href=>$to->{'href'}, -class=>"hash"},
2315                                            substr($diffinfo->{'to_id'},0,7));
2316                 } else {
2317                         $to_link = '0' x 7;
2318                 }
2319                 my ($from_id, $to_id) = ($diffinfo->{'from_id'}, $diffinfo->{'to_id'});
2320                 $line =~ s!$from_id\.\.$to_id!$from_link..$to_link!;
2321         }
2322
2323         return $line . "<br/>\n";
2324 }
2325
2326 # format from-file/to-file diff header
2327 sub format_diff_from_to_header {
2328         my ($from_line, $to_line, $diffinfo, $from, $to, @parents) = @_;
2329         my $line;
2330         my $result = '';
2331
2332         $line = $from_line;
2333         #assert($line =~ m/^---/) if DEBUG;
2334         # no extra formatting for "^--- /dev/null"
2335         if (! $diffinfo->{'nparents'}) {
2336                 # ordinary (single parent) diff
2337                 if ($line =~ m!^--- "?a/!) {
2338                         if ($from->{'href'}) {
2339                                 $line = '--- a/' .
2340                                         $cgi->a({-href=>$from->{'href'}, -class=>"path"},
2341                                                 esc_path($from->{'file'}));
2342                         } else {
2343                                 $line = '--- a/' .
2344                                         esc_path($from->{'file'});
2345                         }
2346                 }
2347                 $result .= qq!<div class="diff from_file">$line</div>\n!;
2348
2349         } else {
2350                 # combined diff (merge commit)
2351                 for (my $i = 0; $i < $diffinfo->{'nparents'}; $i++) {
2352                         if ($from->{'href'}[$i]) {
2353                                 $line = '--- ' .
2354                                         $cgi->a({-href=>href(action=>"blobdiff",
2355                                                              hash_parent=>$diffinfo->{'from_id'}[$i],
2356                                                              hash_parent_base=>$parents[$i],
2357                                                              file_parent=>$from->{'file'}[$i],
2358                                                              hash=>$diffinfo->{'to_id'},
2359                                                              hash_base=>$hash,
2360                                                              file_name=>$to->{'file'}),
2361                                                  -class=>"path",
2362                                                  -title=>"diff" . ($i+1)},
2363                                                 $i+1) .
2364                                         '/' .
2365                                         $cgi->a({-href=>$from->{'href'}[$i], -class=>"path"},
2366                                                 esc_path($from->{'file'}[$i]));
2367                         } else {
2368                                 $line = '--- /dev/null';
2369                         }
2370                         $result .= qq!<div class="diff from_file">$line</div>\n!;
2371                 }
2372         }
2373
2374         $line = $to_line;
2375         #assert($line =~ m/^\+\+\+/) if DEBUG;
2376         # no extra formatting for "^+++ /dev/null"
2377         if ($line =~ m!^\+\+\+ "?b/!) {
2378                 if ($to->{'href'}) {
2379                         $line = '+++ b/' .
2380                                 $cgi->a({-href=>$to->{'href'}, -class=>"path"},
2381                                         esc_path($to->{'file'}));
2382                 } else {
2383                         $line = '+++ b/' .
2384                                 esc_path($to->{'file'});
2385                 }
2386         }
2387         $result .= qq!<div class="diff to_file">$line</div>\n!;
2388
2389         return $result;
2390 }
2391
2392 # create note for patch simplified by combined diff
2393 sub format_diff_cc_simplified {
2394         my ($diffinfo, @parents) = @_;
2395         my $result = '';
2396
2397         $result .= "<div class=\"diff header\">" .
2398                    "diff --cc ";
2399         if (!is_deleted($diffinfo)) {
2400                 $result .= $cgi->a({-href => href(action=>"blob",
2401                                                   hash_base=>$hash,
2402                                                   hash=>$diffinfo->{'to_id'},
2403                                                   file_name=>$diffinfo->{'to_file'}),
2404                                     -class => "path"},
2405                                    esc_path($diffinfo->{'to_file'}));
2406         } else {
2407                 $result .= esc_path($diffinfo->{'to_file'});
2408         }
2409         $result .= "</div>\n" . # class="diff header"
2410                    "<div class=\"diff nodifferences\">" .
2411                    "Simple merge" .
2412                    "</div>\n"; # class="diff nodifferences"
2413
2414         return $result;
2415 }
2416
2417 sub diff_line_class {
2418         my ($line, $from, $to) = @_;
2419
2420         # ordinary diff
2421         my $num_sign = 1;
2422         # combined diff
2423         if ($from && $to && ref($from->{'href'}) eq "ARRAY") {
2424                 $num_sign = scalar @{$from->{'href'}};
2425         }
2426
2427         my @diff_line_classifier = (
2428                 { regexp => qr/^\@\@{$num_sign} /, class => "chunk_header"},
2429                 { regexp => qr/^\\/,               class => "incomplete"  },
2430                 { regexp => qr/^ {$num_sign}/,     class => "ctx" },
2431                 # classifier for context must come before classifier add/rem,
2432                 # or we would have to use more complicated regexp, for example
2433                 # qr/(?= {0,$m}\+)[+ ]{$num_sign}/, where $m = $num_sign - 1;
2434                 { regexp => qr/^[+ ]{$num_sign}/,   class => "add" },
2435                 { regexp => qr/^[- ]{$num_sign}/,   class => "rem" },
2436         );
2437         for my $clsfy (@diff_line_classifier) {
2438                 return $clsfy->{'class'}
2439                         if ($line =~ $clsfy->{'regexp'});
2440         }
2441
2442         # fallback
2443         return "";
2444 }
2445
2446 # assumes that $from and $to are defined and correctly filled,
2447 # and that $line holds a line of chunk header for unified diff
2448 sub format_unidiff_chunk_header {
2449         my ($line, $from, $to) = @_;
2450
2451         my ($from_text, $from_start, $from_lines, $to_text, $to_start, $to_lines, $section) =
2452                 $line =~ m/^\@{2} (-(\d+)(?:,(\d+))?) (\+(\d+)(?:,(\d+))?) \@{2}(.*)$/;
2453
2454         $from_lines = 0 unless defined $from_lines;
2455         $to_lines   = 0 unless defined $to_lines;
2456
2457         if ($from->{'href'}) {
2458                 $from_text = $cgi->a({-href=>"$from->{'href'}#l$from_start",
2459                                      -class=>"list"}, $from_text);
2460         }
2461         if ($to->{'href'}) {
2462                 $to_text   = $cgi->a({-href=>"$to->{'href'}#l$to_start",
2463                                      -class=>"list"}, $to_text);
2464         }
2465         $line = "<span class=\"chunk_info\">@@ $from_text $to_text @@</span>" .
2466                 "<span class=\"section\">" . esc_html($section, -nbsp=>1) . "</span>";
2467         return $line;
2468 }
2469
2470 # assumes that $from and $to are defined and correctly filled,
2471 # and that $line holds a line of chunk header for combined diff
2472 sub format_cc_diff_chunk_header {
2473         my ($line, $from, $to) = @_;
2474
2475         my ($prefix, $ranges, $section) = $line =~ m/^(\@+) (.*?) \@+(.*)$/;
2476         my (@from_text, @from_start, @from_nlines, $to_text, $to_start, $to_nlines);
2477
2478         @from_text = split(' ', $ranges);
2479         for (my $i = 0; $i < @from_text; ++$i) {
2480                 ($from_start[$i], $from_nlines[$i]) =
2481                         (split(',', substr($from_text[$i], 1)), 0);
2482         }
2483
2484         $to_text   = pop @from_text;
2485         $to_start  = pop @from_start;
2486         $to_nlines = pop @from_nlines;
2487
2488         $line = "<span class=\"chunk_info\">$prefix ";
2489         for (my $i = 0; $i < @from_text; ++$i) {
2490                 if ($from->{'href'}[$i]) {
2491                         $line .= $cgi->a({-href=>"$from->{'href'}[$i]#l$from_start[$i]",
2492                                           -class=>"list"}, $from_text[$i]);
2493                 } else {
2494                         $line .= $from_text[$i];
2495                 }
2496                 $line .= " ";
2497         }
2498         if ($to->{'href'}) {
2499                 $line .= $cgi->a({-href=>"$to->{'href'}#l$to_start",
2500                                   -class=>"list"}, $to_text);
2501         } else {
2502                 $line .= $to_text;
2503         }
2504         $line .= " $prefix</span>" .
2505                  "<span class=\"section\">" . esc_html($section, -nbsp=>1) . "</span>";
2506         return $line;
2507 }
2508
2509 # process patch (diff) line (not to be used for diff headers),
2510 # returning HTML-formatted (but not wrapped) line.
2511 # If the line is passed as a reference, it is treated as HTML and not
2512 # esc_html()'ed.
2513 sub format_diff_line {
2514         my ($line, $diff_class, $from, $to) = @_;
2515
2516         if (ref($line)) {
2517                 $line = $$line;
2518         } else {
2519                 chomp $line;
2520                 $line = untabify($line);
2521
2522                 if ($from && $to && $line =~ m/^\@{2} /) {
2523                         $line = format_unidiff_chunk_header($line, $from, $to);
2524                 } elsif ($from && $to && $line =~ m/^\@{3}/) {
2525                         $line = format_cc_diff_chunk_header($line, $from, $to);
2526                 } else {
2527                         $line = esc_html($line, -nbsp=>1);
2528                 }
2529         }
2530
2531         my $diff_classes = "diff";
2532         $diff_classes .= " $diff_class" if ($diff_class);
2533         $line = "<div class=\"$diff_classes\">$line</div>\n";
2534
2535         return $line;
2536 }
2537
2538 # Generates undef or something like "_snapshot_" or "snapshot (_tbz2_ _zip_)",
2539 # linked.  Pass the hash of the tree/commit to snapshot.
2540 sub format_snapshot_links {
2541         my ($hash) = @_;
2542         my $num_fmts = @snapshot_fmts;
2543         if ($num_fmts > 1) {
2544                 # A parenthesized list of links bearing format names.
2545                 # e.g. "snapshot (_tar.gz_ _zip_)"
2546                 return "snapshot (" . join(' ', map
2547                         $cgi->a({
2548                                 -href => href(
2549                                         action=>"snapshot",
2550                                         hash=>$hash,
2551                                         snapshot_format=>$_
2552                                 )
2553                         }, $known_snapshot_formats{$_}{'display'})
2554                 , @snapshot_fmts) . ")";
2555         } elsif ($num_fmts == 1) {
2556                 # A single "snapshot" link whose tooltip bears the format name.
2557                 # i.e. "_snapshot_"
2558                 my ($fmt) = @snapshot_fmts;
2559                 return
2560                         $cgi->a({
2561                                 -href => href(
2562                                         action=>"snapshot",
2563                                         hash=>$hash,
2564                                         snapshot_format=>$fmt
2565                                 ),
2566                                 -title => "in format: $known_snapshot_formats{$fmt}{'display'}"
2567                         }, "snapshot");
2568         } else { # $num_fmts == 0
2569                 return undef;
2570         }
2571 }
2572
2573 ## ......................................................................
2574 ## functions returning values to be passed, perhaps after some
2575 ## transformation, to other functions; e.g. returning arguments to href()
2576
2577 # returns hash to be passed to href to generate gitweb URL
2578 # in -title key it returns description of link
2579 sub get_feed_info {
2580         my $format = shift || 'Atom';
2581         my %res = (action => lc($format));
2582         my $matched_ref = 0;
2583
2584         # feed links are possible only for project views
2585         return unless (defined $project);
2586         # some views should link to OPML, or to generic project feed,
2587         # or don't have specific feed yet (so they should use generic)
2588         return if (!$action || $action =~ /^(?:tags|heads|forks|tag|search)$/x);
2589
2590         my $branch = undef;
2591         # branches refs uses 'refs/' + $get_branch_refs()[x] + '/' prefix
2592         # (fullname) to differentiate from tag links; this also makes
2593         # possible to detect branch links
2594         for my $ref (get_branch_refs()) {
2595                 if ((defined $hash_base && $hash_base =~ m!^refs/\Q$ref\E/(.*)$!) ||
2596                     (defined $hash      && $hash      =~ m!^refs/\Q$ref\E/(.*)$!)) {
2597                         $branch = $1;
2598                         $matched_ref = $ref;
2599                         last;
2600                 }
2601         }
2602         # find log type for feed description (title)
2603         my $type = 'log';
2604         if (defined $file_name) {
2605                 $type  = "history of $file_name";
2606                 $type .= "/" if ($action eq 'tree');
2607                 $type .= " on '$branch'" if (defined $branch);
2608         } else {
2609                 $type = "log of $branch" if (defined $branch);
2610         }
2611
2612         $res{-title} = $type;
2613         $res{'hash'} = (defined $branch ? "refs/$matched_ref/$branch" : undef);
2614         $res{'file_name'} = $file_name;
2615
2616         return %res;
2617 }
2618
2619 ## ----------------------------------------------------------------------
2620 ## git utility subroutines, invoking git commands
2621
2622 # returns path to the core git executable and the --git-dir parameter as list
2623 sub git_cmd {
2624         $number_of_git_cmds++;
2625         return $GIT, '--git-dir='.$git_dir;
2626 }
2627
2628 # quote the given arguments for passing them to the shell
2629 # quote_command("command", "arg 1", "arg with ' and ! characters")
2630 # => "'command' 'arg 1' 'arg with '\'' and '\!' characters'"
2631 # Try to avoid using this function wherever possible.
2632 sub quote_command {
2633         return join(' ',
2634                 map { my $a = $_; $a =~ s/(['!])/'\\$1'/g; "'$a'" } @_ );
2635 }
2636
2637 # get HEAD ref of given project as hash
2638 sub git_get_head_hash {
2639         return git_get_full_hash(shift, 'HEAD');
2640 }
2641
2642 sub git_get_full_hash {
2643         return git_get_hash(@_);
2644 }
2645
2646 sub git_get_short_hash {
2647         return git_get_hash(@_, '--short=7');
2648 }
2649
2650 sub git_get_hash {
2651         my ($project, $hash, @options) = @_;
2652         my $o_git_dir = $git_dir;
2653         my $retval = undef;
2654         $git_dir = "$projectroot/$project";
2655         if (open my $fd, '-|', git_cmd(), 'rev-parse',
2656             '--verify', '-q', @options, $hash) {
2657                 $retval = <$fd>;
2658                 chomp $retval if defined $retval;
2659                 close $fd;
2660         }
2661         if (defined $o_git_dir) {
2662                 $git_dir = $o_git_dir;
2663         }
2664         return $retval;
2665 }
2666
2667 # get type of given object
2668 sub git_get_type {
2669         my $hash = shift;
2670
2671         open my $fd, "-|", git_cmd(), "cat-file", '-t', $hash or return;
2672         my $type = <$fd>;
2673         close $fd or return;
2674         chomp $type;
2675         return $type;
2676 }
2677
2678 # repository configuration
2679 our $config_file = '';
2680 our %config;
2681
2682 # store multiple values for single key as anonymous array reference
2683 # single values stored directly in the hash, not as [ <value> ]
2684 sub hash_set_multi {
2685         my ($hash, $key, $value) = @_;
2686
2687         if (!exists $hash->{$key}) {
2688                 $hash->{$key} = $value;
2689         } elsif (!ref $hash->{$key}) {
2690                 $hash->{$key} = [ $hash->{$key}, $value ];
2691         } else {
2692                 push @{$hash->{$key}}, $value;
2693         }
2694 }
2695
2696 # return hash of git project configuration
2697 # optionally limited to some section, e.g. 'gitweb'
2698 sub git_parse_project_config {
2699         my $section_regexp = shift;
2700         my %config;
2701
2702         local $/ = "\0";
2703
2704         open my $fh, "-|", git_cmd(), "config", '-z', '-l',
2705                 or return;
2706
2707         while (my $keyval = <$fh>) {
2708                 chomp $keyval;
2709                 my ($key, $value) = split(/\n/, $keyval, 2);
2710
2711                 hash_set_multi(\%config, $key, $value)
2712                         if (!defined $section_regexp || $key =~ /^(?:$section_regexp)\./o);
2713         }
2714         close $fh;
2715
2716         return %config;
2717 }
2718
2719 # convert config value to boolean: 'true' or 'false'
2720 # no value, number > 0, 'true' and 'yes' values are true
2721 # rest of values are treated as false (never as error)
2722 sub config_to_bool {
2723         my $val = shift;
2724
2725         return 1 if !defined $val;             # section.key
2726
2727         # strip leading and trailing whitespace
2728         $val =~ s/^\s+//;
2729         $val =~ s/\s+$//;
2730
2731         return (($val =~ /^\d+$/ && $val) ||   # section.key = 1
2732                 ($val =~ /^(?:true|yes)$/i));  # section.key = true
2733 }
2734
2735 # convert config value to simple decimal number
2736 # an optional value suffix of 'k', 'm', or 'g' will cause the value
2737 # to be multiplied by 1024, 1048576, or 1073741824
2738 sub config_to_int {
2739         my $val = shift;
2740
2741         # strip leading and trailing whitespace
2742         $val =~ s/^\s+//;
2743         $val =~ s/\s+$//;
2744
2745         if (my ($num, $unit) = ($val =~ /^([0-9]*)([kmg])$/i)) {
2746                 $unit = lc($unit);
2747                 # unknown unit is treated as 1
2748                 return $num * ($unit eq 'g' ? 1073741824 :
2749                                $unit eq 'm' ?    1048576 :
2750                                $unit eq 'k' ?       1024 : 1);
2751         }
2752         return $val;
2753 }
2754
2755 # convert config value to array reference, if needed
2756 sub config_to_multi {
2757         my $val = shift;
2758
2759         return ref($val) ? $val : (defined($val) ? [ $val ] : []);
2760 }
2761
2762 sub git_get_project_config {
2763         my ($key, $type) = @_;
2764
2765         return unless defined $git_dir;
2766
2767         # key sanity check
2768         return unless ($key);
2769         # only subsection, if exists, is case sensitive,
2770         # and not lowercased by 'git config -z -l'
2771         if (my ($hi, $mi, $lo) = ($key =~ /^([^.]*)\.(.*)\.([^.]*)$/)) {
2772                 $lo =~ s/_//g;
2773                 $key = join(".", lc($hi), $mi, lc($lo));
2774                 return if ($lo =~ /\W/ || $hi =~ /\W/);
2775         } else {
2776                 $key = lc($key);
2777                 $key =~ s/_//g;
2778                 return if ($key =~ /\W/);
2779         }
2780         $key =~ s/^gitweb\.//;
2781
2782         # type sanity check
2783         if (defined $type) {
2784                 $type =~ s/^--//;
2785                 $type = undef
2786                         unless ($type eq 'bool' || $type eq 'int');
2787         }
2788
2789         # get config
2790         if (!defined $config_file ||
2791             $config_file ne "$git_dir/config") {
2792                 %config = git_parse_project_config('gitweb');
2793                 $config_file = "$git_dir/config";
2794         }
2795
2796         # check if config variable (key) exists
2797         return unless exists $config{"gitweb.$key"};
2798
2799         # ensure given type
2800         if (!defined $type) {
2801                 return $config{"gitweb.$key"};
2802         } elsif ($type eq 'bool') {
2803                 # backward compatibility: 'git config --bool' returns true/false
2804                 return config_to_bool($config{"gitweb.$key"}) ? 'true' : 'false';
2805         } elsif ($type eq 'int') {
2806                 return config_to_int($config{"gitweb.$key"});
2807         }
2808         return $config{"gitweb.$key"};
2809 }
2810
2811 # get hash of given path at given ref
2812 sub git_get_hash_by_path {
2813         my $base = shift;
2814         my $path = shift || return undef;
2815         my $type = shift;
2816
2817         $path =~ s,/+$,,;
2818
2819         open my $fd, "-|", git_cmd(), "ls-tree", $base, "--", $path
2820                 or die_error(500, "Open git-ls-tree failed");
2821         my $line = <$fd>;
2822         close $fd or return undef;
2823
2824         if (!defined $line) {
2825                 # there is no tree or hash given by $path at $base
2826                 return undef;
2827         }
2828
2829         #'100644 blob 0fa3f3a66fb6a137f6ec2c19351ed4d807070ffa  panic.c'
2830         $line =~ m/^([0-9]+) (.+) ([0-9a-fA-F]{40})\t/;
2831         if (defined $type && $type ne $2) {
2832                 # type doesn't match
2833                 return undef;
2834         }
2835         return $3;
2836 }
2837
2838 # get path of entry with given hash at given tree-ish (ref)
2839 # used to get 'from' filename for combined diff (merge commit) for renames
2840 sub git_get_path_by_hash {
2841         my $base = shift || return;
2842         my $hash = shift || return;
2843
2844         local $/ = "\0";
2845
2846         open my $fd, "-|", git_cmd(), "ls-tree", '-r', '-t', '-z', $base
2847                 or return undef;
2848         while (my $line = <$fd>) {
2849                 chomp $line;
2850
2851                 #'040000 tree 595596a6a9117ddba9fe379b6b012b558bac8423  gitweb'
2852                 #'100644 blob e02e90f0429be0d2a69b76571101f20b8f75530f  gitweb/README'
2853                 if ($line =~ m/(?:[0-9]+) (?:.+) $hash\t(.+)$/) {
2854                         close $fd;
2855                         return $1;
2856                 }
2857         }
2858         close $fd;
2859         return undef;
2860 }
2861
2862 ## ......................................................................
2863 ## git utility functions, directly accessing git repository
2864
2865 # get the value of config variable either from file named as the variable
2866 # itself in the repository ($GIT_DIR/$name file), or from gitweb.$name
2867 # configuration variable in the repository config file.
2868 sub git_get_file_or_project_config {
2869         my ($path, $name) = @_;
2870
2871         $git_dir = "$projectroot/$path";
2872         open my $fd, '<', "$git_dir/$name"
2873                 or return git_get_project_config($name);
2874         my $conf = <$fd>;
2875         close $fd;
2876         if (defined $conf) {
2877                 chomp $conf;
2878         }
2879         return $conf;
2880 }
2881
2882 sub git_get_project_description {
2883         my $path = shift;
2884         return git_get_file_or_project_config($path, 'description');
2885 }
2886
2887 sub git_get_project_category {
2888         my $path = shift;
2889         return git_get_file_or_project_config($path, 'category');
2890 }
2891
2892
2893 # supported formats:
2894 # * $GIT_DIR/ctags/<tagname> file (in 'ctags' subdirectory)
2895 #   - if its contents is a number, use it as tag weight,
2896 #   - otherwise add a tag with weight 1
2897 # * $GIT_DIR/ctags file, each line is a tag (with weight 1)
2898 #   the same value multiple times increases tag weight
2899 # * `gitweb.ctag' multi-valued repo config variable
2900 sub git_get_project_ctags {
2901         my $project = shift;
2902         my $ctags = {};
2903
2904         $git_dir = "$projectroot/$project";
2905         if (opendir my $dh, "$git_dir/ctags") {
2906                 my @files = grep { -f $_ } map { "$git_dir/ctags/$_" } readdir($dh);
2907                 foreach my $tagfile (@files) {
2908                         open my $ct, '<', $tagfile
2909                                 or next;
2910                         my $val = <$ct>;
2911                         chomp $val if $val;
2912                         close $ct;
2913
2914                         (my $ctag = $tagfile) =~ s#.*/##;
2915                         if ($val =~ /^\d+$/) {
2916                                 $ctags->{$ctag} = $val;
2917                         } else {
2918                                 $ctags->{$ctag} = 1;
2919                         }
2920                 }
2921                 closedir $dh;
2922
2923         } elsif (open my $fh, '<', "$git_dir/ctags") {
2924                 while (my $line = <$fh>) {
2925                         chomp $line;
2926                         $ctags->{$line}++ if $line;
2927                 }
2928                 close $fh;
2929
2930         } else {
2931                 my $taglist = config_to_multi(git_get_project_config('ctag'));
2932                 foreach my $tag (@$taglist) {
2933                         $ctags->{$tag}++;
2934                 }
2935         }
2936
2937         return $ctags;
2938 }
2939
2940 # return hash, where keys are content tags ('ctags'),
2941 # and values are sum of weights of given tag in every project
2942 sub git_gather_all_ctags {
2943         my $projects = shift;
2944         my $ctags = {};
2945
2946         foreach my $p (@$projects) {
2947                 foreach my $ct (keys %{$p->{'ctags'}}) {
2948                         $ctags->{$ct} += $p->{'ctags'}->{$ct};
2949                 }
2950         }
2951
2952         return $ctags;
2953 }
2954
2955 sub git_populate_project_tagcloud {
2956         my $ctags = shift;
2957
2958         # First, merge different-cased tags; tags vote on casing
2959         my %ctags_lc;
2960         foreach (keys %$ctags) {
2961                 $ctags_lc{lc $_}->{count} += $ctags->{$_};
2962                 if (not $ctags_lc{lc $_}->{topcount}
2963                     or $ctags_lc{lc $_}->{topcount} < $ctags->{$_}) {
2964                         $ctags_lc{lc $_}->{topcount} = $ctags->{$_};
2965                         $ctags_lc{lc $_}->{topname} = $_;
2966                 }
2967         }
2968
2969         my $cloud;
2970         my $matched = $input_params{'ctag'};
2971         if (eval { require HTML::TagCloud; 1; }) {
2972                 $cloud = HTML::TagCloud->new;
2973                 foreach my $ctag (sort keys %ctags_lc) {
2974                         # Pad the title with spaces so that the cloud looks
2975                         # less crammed.
2976                         my $title = esc_html($ctags_lc{$ctag}->{topname});
2977                         $title =~ s/ /&nbsp;/g;
2978                         $title =~ s/^/&nbsp;/g;
2979                         $title =~ s/$/&nbsp;/g;
2980                         if (defined $matched && $matched eq $ctag) {
2981                                 $title = qq(<span class="match">$title</span>);
2982                         }
2983                         $cloud->add($title, href(project=>undef, ctag=>$ctag),
2984                                     $ctags_lc{$ctag}->{count});
2985                 }
2986         } else {
2987                 $cloud = {};
2988                 foreach my $ctag (keys %ctags_lc) {
2989                         my $title = esc_html($ctags_lc{$ctag}->{topname}, -nbsp=>1);
2990                         if (defined $matched && $matched eq $ctag) {
2991                                 $title = qq(<span class="match">$title</span>);
2992                         }
2993                         $cloud->{$ctag}{count} = $ctags_lc{$ctag}->{count};
2994                         $cloud->{$ctag}{ctag} =
2995                                 $cgi->a({-href=>href(project=>undef, ctag=>$ctag)}, $title);
2996                 }
2997         }
2998         return $cloud;
2999 }
3000
3001 sub git_show_project_tagcloud {
3002         my ($cloud, $count) = @_;
3003         if (ref $cloud eq 'HTML::TagCloud') {
3004                 return $cloud->html_and_css($count);
3005         } else {
3006                 my @tags = sort { $cloud->{$a}->{'count'} <=> $cloud->{$b}->{'count'} } keys %$cloud;
3007                 return
3008                         '<div id="htmltagcloud"'.($project ? '' : ' align="center"').'>' .
3009                         join (', ', map {
3010                                 $cloud->{$_}->{'ctag'}
3011                         } splice(@tags, 0, $count)) .
3012                         '</div>';
3013         }
3014 }
3015
3016 sub git_get_project_url_list {
3017         my $path = shift;
3018
3019         $git_dir = "$projectroot/$path";
3020         open my $fd, '<', "$git_dir/cloneurl"
3021                 or return wantarray ?
3022                 @{ config_to_multi(git_get_project_config('url')) } :
3023                    config_to_multi(git_get_project_config('url'));
3024         my @git_project_url_list = map { chomp; $_ } <$fd>;
3025         close $fd;
3026
3027         return wantarray ? @git_project_url_list : \@git_project_url_list;
3028 }
3029
3030 sub git_get_projects_list {
3031         my $filter = shift || '';
3032         my $paranoid = shift;
3033         my @list;
3034
3035         if (-d $projects_list) {
3036                 # search in directory
3037                 my $dir = $projects_list;
3038                 # remove the trailing "/"
3039                 $dir =~ s!/+$!!;
3040                 my $pfxlen = length("$dir");
3041                 my $pfxdepth = ($dir =~ tr!/!!);
3042                 # when filtering, search only given subdirectory
3043                 if ($filter && !$paranoid) {
3044                         $dir .= "/$filter";
3045                         $dir =~ s!/+$!!;
3046                 }
3047
3048                 File::Find::find({
3049                         follow_fast => 1, # follow symbolic links
3050                         follow_skip => 2, # ignore duplicates
3051                         dangling_symlinks => 0, # ignore dangling symlinks, silently
3052                         wanted => sub {
3053                                 # global variables
3054                                 our $project_maxdepth;
3055                                 our $projectroot;
3056                                 # skip project-list toplevel, if we get it.
3057                                 return if (m!^[/.]$!);
3058                                 # only directories can be git repositories
3059                                 return unless (-d $_);
3060                                 # don't traverse too deep (Find is super slow on os x)
3061                                 # $project_maxdepth excludes depth of $projectroot
3062                                 if (($File::Find::name =~ tr!/!!) - $pfxdepth > $project_maxdepth) {
3063                                         $File::Find::prune = 1;
3064                                         return;
3065                                 }
3066
3067                                 my $path = substr($File::Find::name, $pfxlen + 1);
3068                                 # paranoidly only filter here
3069                                 if ($paranoid && $filter && $path !~ m!^\Q$filter\E/!) {
3070                                         next;
3071                                 }
3072                                 # we check related file in $projectroot
3073                                 if (check_export_ok("$projectroot/$path")) {
3074                                         push @list, { path => $path };
3075                                         $File::Find::prune = 1;
3076                                 }
3077                         },
3078                 }, "$dir");
3079
3080         } elsif (-f $projects_list) {
3081                 # read from file(url-encoded):
3082                 # 'git%2Fgit.git Linus+Torvalds'
3083                 # 'libs%2Fklibc%2Fklibc.git H.+Peter+Anvin'
3084                 # 'linux%2Fhotplug%2Fudev.git Greg+Kroah-Hartman'
3085                 open my $fd, '<', $projects_list or return;
3086         PROJECT:
3087                 while (my $line = <$fd>) {
3088                         chomp $line;
3089                         my ($path, $owner) = split ' ', $line;
3090                         $path = unescape($path);
3091                         $owner = unescape($owner);
3092                         if (!defined $path) {
3093                                 next;
3094                         }
3095                         # if $filter is rpovided, check if $path begins with $filter
3096                         if ($filter && $path !~ m!^\Q$filter\E/!) {
3097                                 next;
3098                         }
3099                         if (check_export_ok("$projectroot/$path")) {
3100                                 my $pr = {
3101                                         path => $path
3102                                 };
3103                                 if ($owner) {
3104                                         $pr->{'owner'} = to_utf8($owner);
3105                                 }
3106                                 push @list, $pr;
3107                         }
3108                 }
3109                 close $fd;
3110         }
3111         return @list;
3112 }
3113
3114 # written with help of Tree::Trie module (Perl Artistic License, GPL compatibile)
3115 # as side effects it sets 'forks' field to list of forks for forked projects
3116 sub filter_forks_from_projects_list {
3117         my $projects = shift;
3118
3119         my %trie; # prefix tree of directories (path components)
3120         # generate trie out of those directories that might contain forks
3121         foreach my $pr (@$projects) {
3122                 my $path = $pr->{'path'};
3123                 $path =~ s/\.git$//;      # forks of 'repo.git' are in 'repo/' directory
3124                 next if ($path =~ m!/$!); # skip non-bare repositories, e.g. 'repo/.git'
3125                 next unless ($path);      # skip '.git' repository: tests, git-instaweb
3126                 next unless (-d "$projectroot/$path"); # containing directory exists
3127                 $pr->{'forks'} = [];      # there can be 0 or more forks of project
3128
3129                 # add to trie
3130                 my @dirs = split('/', $path);
3131                 # walk the trie, until either runs out of components or out of trie
3132                 my $ref = \%trie;
3133                 while (scalar @dirs &&
3134                        exists($ref->{$dirs[0]})) {
3135                         $ref = $ref->{shift @dirs};
3136                 }
3137                 # create rest of trie structure from rest of components
3138                 foreach my $dir (@dirs) {
3139                         $ref = $ref->{$dir} = {};
3140                 }
3141                 # create end marker, store $pr as a data
3142                 $ref->{''} = $pr if (!exists $ref->{''});
3143         }
3144
3145         # filter out forks, by finding shortest prefix match for paths
3146         my @filtered;
3147  PROJECT:
3148         foreach my $pr (@$projects) {
3149                 # trie lookup
3150                 my $ref = \%trie;
3151         DIR:
3152                 foreach my $dir (split('/', $pr->{'path'})) {
3153                         if (exists $ref->{''}) {
3154                                 # found [shortest] prefix, is a fork - skip it
3155                                 push @{$ref->{''}{'forks'}}, $pr;
3156                                 next PROJECT;
3157                         }
3158                         if (!exists $ref->{$dir}) {
3159                                 # not in trie, cannot have prefix, not a fork
3160                                 push @filtered, $pr;
3161                                 next PROJECT;
3162                         }
3163                         # If the dir is there, we just walk one step down the trie.
3164                         $ref = $ref->{$dir};
3165                 }
3166                 # we ran out of trie
3167                 # (shouldn't happen: it's either no match, or end marker)
3168                 push @filtered, $pr;
3169         }
3170
3171         return @filtered;
3172 }
3173
3174 # note: fill_project_list_info must be run first,
3175 # for 'descr_long' and 'ctags' to be filled
3176 sub search_projects_list {
3177         my ($projlist, %opts) = @_;
3178         my $tagfilter  = $opts{'tagfilter'};
3179         my $search_re = $opts{'search_regexp'};
3180
3181         return @$projlist
3182                 unless ($tagfilter || $search_re);
3183
3184         # searching projects require filling to be run before it;
3185         fill_project_list_info($projlist,
3186                                $tagfilter  ? 'ctags' : (),
3187                                $search_re ? ('path', 'descr') : ());
3188         my @projects;
3189  PROJECT:
3190         foreach my $pr (@$projlist) {
3191
3192                 if ($tagfilter) {
3193                         next unless ref($pr->{'ctags'}) eq 'HASH';
3194                         next unless
3195                                 grep { lc($_) eq lc($tagfilter) } keys %{$pr->{'ctags'}};
3196                 }
3197
3198                 if ($search_re) {
3199                         next unless
3200                                 $pr->{'path'} =~ /$search_re/ ||
3201                                 $pr->{'descr_long'} =~ /$search_re/;
3202                 }
3203
3204                 push @projects, $pr;
3205         }
3206
3207         return @projects;
3208 }
3209
3210 our $gitweb_project_owner = undef;
3211 sub git_get_project_list_from_file {
3212
3213         return if (defined $gitweb_project_owner);
3214
3215         $gitweb_project_owner = {};
3216         # read from file (url-encoded):
3217         # 'git%2Fgit.git Linus+Torvalds'
3218         # 'libs%2Fklibc%2Fklibc.git H.+Peter+Anvin'
3219         # 'linux%2Fhotplug%2Fudev.git Greg+Kroah-Hartman'
3220         if (-f $projects_list) {
3221                 open(my $fd, '<', $projects_list);
3222                 while (my $line = <$fd>) {
3223                         chomp $line;
3224                         my ($pr, $ow) = split ' ', $line;
3225                         $pr = unescape($pr);
3226                         $ow = unescape($ow);
3227                         $gitweb_project_owner->{$pr} = to_utf8($ow);
3228                 }
3229                 close $fd;
3230         }
3231 }
3232
3233 sub git_get_project_owner {
3234         my $project = shift;
3235         my $owner;
3236
3237         return undef unless $project;
3238         $git_dir = "$projectroot/$project";
3239
3240         if (!defined $gitweb_project_owner) {
3241                 git_get_project_list_from_file();
3242         }
3243
3244         if (exists $gitweb_project_owner->{$project}) {
3245                 $owner = $gitweb_project_owner->{$project};
3246         }
3247         if (!defined $owner){
3248                 $owner = git_get_project_config('owner');
3249         }
3250         if (!defined $owner) {
3251                 $owner = get_file_owner("$git_dir");
3252         }
3253
3254         return $owner;
3255 }
3256
3257 sub git_get_last_activity {
3258         my ($path) = @_;
3259         my $fd;
3260
3261         $git_dir = "$projectroot/$path";
3262         open($fd, "-|", git_cmd(), 'for-each-ref',
3263              '--format=%(committer)',
3264              '--sort=-committerdate',
3265              '--count=1',
3266              map { "refs/$_" } get_branch_refs ()) or return;
3267         my $most_recent = <$fd>;
3268         close $fd or return;
3269         if (defined $most_recent &&
3270             $most_recent =~ / (\d+) [-+][01]\d\d\d$/) {
3271                 my $timestamp = $1;
3272                 my $age = time - $timestamp;
3273                 return ($age, age_string($age));
3274         }
3275         return (undef, undef);
3276 }
3277
3278 # Implementation note: when a single remote is wanted, we cannot use 'git
3279 # remote show -n' because that command always work (assuming it's a remote URL
3280 # if it's not defined), and we cannot use 'git remote show' because that would
3281 # try to make a network roundtrip. So the only way to find if that particular
3282 # remote is defined is to walk the list provided by 'git remote -v' and stop if
3283 # and when we find what we want.
3284 sub git_get_remotes_list {
3285         my $wanted = shift;
3286         my %remotes = ();
3287
3288         open my $fd, '-|' , git_cmd(), 'remote', '-v';
3289         return unless $fd;
3290         while (my $remote = <$fd>) {
3291                 chomp $remote;
3292                 $remote =~ s!\t(.*?)\s+\((\w+)\)$!!;
3293                 next if $wanted and not $remote eq $wanted;
3294                 my ($url, $key) = ($1, $2);
3295
3296                 $remotes{$remote} ||= { 'heads' => () };
3297                 $remotes{$remote}{$key} = $url;
3298         }
3299         close $fd or return;
3300         return wantarray ? %remotes : \%remotes;
3301 }
3302
3303 # Takes a hash of remotes as first parameter and fills it by adding the
3304 # available remote heads for each of the indicated remotes.
3305 sub fill_remote_heads {
3306         my $remotes = shift;
3307         my @heads = map { "remotes/$_" } keys %$remotes;
3308         my @remoteheads = git_get_heads_list(undef, @heads);
3309         foreach my $remote (keys %$remotes) {
3310                 $remotes->{$remote}{'heads'} = [ grep {
3311                         $_->{'name'} =~ s!^$remote/!!
3312                         } @remoteheads ];
3313         }
3314 }
3315
3316 sub git_get_references {
3317         my $type = shift || "";
3318         my %refs;
3319         # 5dc01c595e6c6ec9ccda4f6f69c131c0dd945f8c refs/tags/v2.6.11
3320         # c39ae07f393806ccf406ef966e9a15afc43cc36a refs/tags/v2.6.11^{}
3321         open my $fd, "-|", git_cmd(), "show-ref", "--dereference",
3322                 ($type ? ("--", "refs/$type") : ()) # use -- <pattern> if $type
3323                 or return;
3324
3325         while (my $line = <$fd>) {
3326                 chomp $line;
3327                 if ($line =~ m!^([0-9a-fA-F]{40})\srefs/($type.*)$!) {
3328                         if (defined $refs{$1}) {
3329                                 push @{$refs{$1}}, $2;
3330                         } else {
3331                                 $refs{$1} = [ $2 ];
3332                         }
3333                 }
3334         }
3335         close $fd or return;
3336         return \%refs;
3337 }
3338
3339 sub git_get_rev_name_tags {
3340         my $hash = shift || return undef;
3341
3342         open my $fd, "-|", git_cmd(), "name-rev", "--tags", $hash
3343                 or return;
3344         my $name_rev = <$fd>;
3345         close $fd;
3346
3347         if ($name_rev =~ m|^$hash tags/(.*)$|) {
3348                 return $1;
3349         } else {
3350                 # catches also '$hash undefined' output
3351                 return undef;
3352         }
3353 }
3354
3355 ## ----------------------------------------------------------------------
3356 ## parse to hash functions
3357
3358 sub parse_date {
3359         my $epoch = shift;
3360         my $tz = shift || "-0000";
3361
3362         my %date;
3363         my @months = ("Jan", "Feb", "Mar", "Apr", "May", "Jun", "Jul", "Aug", "Sep", "Oct", "Nov", "Dec");
3364         my @days = ("Sun", "Mon", "Tue", "Wed", "Thu", "Fri", "Sat");
3365         my ($sec, $min, $hour, $mday, $mon, $year, $wday, $yday) = gmtime($epoch);
3366         $date{'hour'} = $hour;
3367         $date{'minute'} = $min;
3368         $date{'mday'} = $mday;
3369         $date{'day'} = $days[$wday];
3370         $date{'month'} = $months[$mon];
3371         $date{'rfc2822'}   = sprintf "%s, %d %s %4d %02d:%02d:%02d +0000",
3372                              $days[$wday], $mday, $months[$mon], 1900+$year, $hour ,$min, $sec;
3373         $date{'mday-time'} = sprintf "%d %s %02d:%02d",
3374                              $mday, $months[$mon], $hour ,$min;
3375         $date{'iso-8601'}  = sprintf "%04d-%02d-%02dT%02d:%02d:%02dZ",
3376                              1900+$year, 1+$mon, $mday, $hour ,$min, $sec;
3377
3378         my ($tz_sign, $tz_hour, $tz_min) =
3379                 ($tz =~ m/^([-+])(\d\d)(\d\d)$/);
3380         $tz_sign = ($tz_sign eq '-' ? -1 : +1);
3381         my $local = $epoch + $tz_sign*((($tz_hour*60) + $tz_min)*60);
3382         ($sec, $min, $hour, $mday, $mon, $year, $wday, $yday) = gmtime($local);
3383         $date{'hour_local'} = $hour;
3384         $date{'minute_local'} = $min;
3385         $date{'tz_local'} = $tz;
3386         $date{'iso-tz'} = sprintf("%04d-%02d-%02d %02d:%02d:%02d %s",
3387                                   1900+$year, $mon+1, $mday,
3388                                   $hour, $min, $sec, $tz);
3389         return %date;
3390 }
3391
3392 sub parse_tag {
3393         my $tag_id = shift;
3394         my %tag;
3395         my @comment;
3396
3397         open my $fd, "-|", git_cmd(), "cat-file", "tag", $tag_id or return;
3398         $tag{'id'} = $tag_id;
3399         while (my $line = <$fd>) {
3400                 chomp $line;
3401                 if ($line =~ m/^object ([0-9a-fA-F]{40})$/) {
3402                         $tag{'object'} = $1;
3403                 } elsif ($line =~ m/^type (.+)$/) {
3404                         $tag{'type'} = $1;
3405                 } elsif ($line =~ m/^tag (.+)$/) {
3406                         $tag{'name'} = $1;
3407                 } elsif ($line =~ m/^tagger (.*) ([0-9]+) (.*)$/) {
3408                         $tag{'author'} = $1;
3409                         $tag{'author_epoch'} = $2;
3410                         $tag{'author_tz'} = $3;
3411                         if ($tag{'author'} =~ m/^([^<]+) <([^>]*)>/) {
3412                                 $tag{'author_name'}  = $1;
3413                                 $tag{'author_email'} = $2;
3414                         } else {
3415                                 $tag{'author_name'} = $tag{'author'};
3416                         }
3417                 } elsif ($line =~ m/--BEGIN/) {
3418                         push @comment, $line;
3419                         last;
3420                 } elsif ($line eq "") {
3421                         last;
3422                 }
3423         }
3424         push @comment, <$fd>;
3425         $tag{'comment'} = \@comment;
3426         close $fd or return;
3427         if (!defined $tag{'name'}) {
3428                 return
3429         };
3430         return %tag
3431 }
3432
3433 sub parse_commit_text {
3434         my ($commit_text, $withparents) = @_;
3435         my @commit_lines = split '\n', $commit_text;
3436         my %co;
3437
3438         pop @commit_lines; # Remove '\0'
3439
3440         if (! @commit_lines) {
3441                 return;
3442         }
3443
3444         my $header = shift @commit_lines;
3445         if ($header !~ m/^[0-9a-fA-F]{40}/) {
3446                 return;
3447         }
3448         ($co{'id'}, my @parents) = split ' ', $header;
3449         while (my $line = shift @commit_lines) {
3450                 last if $line eq "\n";
3451                 if ($line =~ m/^tree ([0-9a-fA-F]{40})$/) {
3452                         $co{'tree'} = $1;
3453                 } elsif ((!defined $withparents) && ($line =~ m/^parent ([0-9a-fA-F]{40})$/)) {
3454                         push @parents, $1;
3455                 } elsif ($line =~ m/^author (.*) ([0-9]+) (.*)$/) {
3456                         $co{'author'} = to_utf8($1);
3457                         $co{'author_epoch'} = $2;
3458                         $co{'author_tz'} = $3;
3459                         if ($co{'author'} =~ m/^([^<]+) <([^>]*)>/) {
3460                                 $co{'author_name'}  = $1;
3461                                 $co{'author_email'} = $2;
3462                         } else {
3463                                 $co{'author_name'} = $co{'author'};
3464                         }
3465                 } elsif ($line =~ m/^committer (.*) ([0-9]+) (.*)$/) {
3466                         $co{'committer'} = to_utf8($1);
3467                         $co{'committer_epoch'} = $2;
3468                         $co{'committer_tz'} = $3;
3469                         if ($co{'committer'} =~ m/^([^<]+) <([^>]*)>/) {
3470                                 $co{'committer_name'}  = $1;
3471                                 $co{'committer_email'} = $2;
3472                         } else {
3473                                 $co{'committer_name'} = $co{'committer'};
3474                         }
3475                 }
3476         }
3477         if (!defined $co{'tree'}) {
3478                 return;
3479         };
3480         $co{'parents'} = \@parents;
3481         $co{'parent'} = $parents[0];
3482
3483         foreach my $title (@commit_lines) {
3484                 $title =~ s/^    //;
3485                 if ($title ne "") {
3486                         $co{'title'} = chop_str($title, 80, 5);
3487                         # remove leading stuff of merges to make the interesting part visible
3488                         if (length($title) > 50) {
3489                                 $title =~ s/^Automatic //;
3490                                 $title =~ s/^merge (of|with) /Merge ... /i;
3491                                 if (length($title) > 50) {
3492                                         $title =~ s/(http|rsync):\/\///;
3493                                 }
3494                                 if (length($title) > 50) {
3495                                         $title =~ s/(master|www|rsync)\.//;
3496                                 }
3497                                 if (length($title) > 50) {
3498                                         $title =~ s/kernel.org:?//;
3499                                 }
3500                                 if (length($title) > 50) {
3501                                         $title =~ s/\/pub\/scm//;
3502                                 }
3503                         }
3504                         $co{'title_short'} = chop_str($title, 50, 5);
3505                         last;
3506                 }
3507         }
3508         if (! defined $co{'title'} || $co{'title'} eq "") {
3509                 $co{'title'} = $co{'title_short'} = '(no commit message)';
3510         }
3511         # remove added spaces
3512         foreach my $line (@commit_lines) {
3513                 $line =~ s/^    //;
3514         }
3515         $co{'comment'} = \@commit_lines;
3516
3517         my $age = time - $co{'committer_epoch'};
3518         $co{'age'} = $age;
3519         $co{'age_string'} = age_string($age);
3520         my ($sec, $min, $hour, $mday, $mon, $year, $wday, $yday) = gmtime($co{'committer_epoch'});
3521         if ($age > 60*60*24*7*2) {
3522                 $co{'age_string_date'} = sprintf "%4i-%02u-%02i", 1900 + $year, $mon+1, $mday;
3523                 $co{'age_string_age'} = $co{'age_string'};
3524         } else {
3525                 $co{'age_string_date'} = $co{'age_string'};
3526                 $co{'age_string_age'} = sprintf "%4i-%02u-%02i", 1900 + $year, $mon+1, $mday;
3527         }
3528         return %co;
3529 }
3530
3531 sub parse_commit {
3532         my ($commit_id) = @_;
3533         my %co;
3534
3535         local $/ = "\0";
3536
3537         open my $fd, "-|", git_cmd(), "rev-list",
3538                 "--parents",
3539                 "--header",
3540                 "--max-count=1",
3541                 $commit_id,
3542                 "--",
3543                 or die_error(500, "Open git-rev-list failed");
3544         %co = parse_commit_text(<$fd>, 1);
3545         close $fd;
3546
3547         return %co;
3548 }
3549
3550 sub parse_commits {
3551         my ($commit_id, $maxcount, $skip, $filename, @args) = @_;
3552         my @cos;
3553
3554         $maxcount ||= 1;
3555         $skip ||= 0;
3556
3557         local $/ = "\0";
3558
3559         open my $fd, "-|", git_cmd(), "rev-list",
3560                 "--header",
3561                 @args,
3562                 ("--max-count=" . $maxcount),
3563                 ("--skip=" . $skip),
3564                 @extra_options,
3565                 $commit_id,
3566                 "--",
3567                 ($filename ? ($filename) : ())
3568                 or die_error(500, "Open git-rev-list failed");
3569         while (my $line = <$fd>) {
3570                 my %co = parse_commit_text($line);
3571                 push @cos, \%co;
3572         }
3573         close $fd;
3574
3575         return wantarray ? @cos : \@cos;
3576 }
3577
3578 # parse line of git-diff-tree "raw" output
3579 sub parse_difftree_raw_line {
3580         my $line = shift;
3581         my %res;
3582
3583         # ':100644 100644 03b218260e99b78c6df0ed378e59ed9205ccc96d 3b93d5e7cc7f7dd4ebed13a5cc1a4ad976fc94d8 M   ls-files.c'
3584         # ':100644 100644 7f9281985086971d3877aca27704f2aaf9c448ce bc190ebc71bbd923f2b728e505408f5e54bd073a M   rev-tree.c'
3585         if ($line =~ m/^:([0-7]{6}) ([0-7]{6}) ([0-9a-fA-F]{40}) ([0-9a-fA-F]{40}) (.)([0-9]{0,3})\t(.*)$/) {
3586                 $res{'from_mode'} = $1;
3587                 $res{'to_mode'} = $2;
3588                 $res{'from_id'} = $3;
3589                 $res{'to_id'} = $4;
3590                 $res{'status'} = $5;
3591                 $res{'similarity'} = $6;
3592                 if ($res{'status'} eq 'R' || $res{'status'} eq 'C') { # renamed or copied
3593                         ($res{'from_file'}, $res{'to_file'}) = map { unquote($_) } split("\t", $7);
3594                 } else {
3595                         $res{'from_file'} = $res{'to_file'} = $res{'file'} = unquote($7);
3596                 }
3597         }
3598         # '::100755 100755 100755 60e79ca1b01bc8b057abe17ddab484699a7f5fdb 94067cc5f73388f33722d52ae02f44692bc07490 94067cc5f73388f33722d52ae02f44692bc07490 MR git-gui/git-gui.sh'
3599         # combined diff (for merge commit)
3600         elsif ($line =~ s/^(::+)((?:[0-7]{6} )+)((?:[0-9a-fA-F]{40} )+)([a-zA-Z]+)\t(.*)$//) {
3601                 $res{'nparents'}  = length($1);
3602                 $res{'from_mode'} = [ split(' ', $2) ];
3603                 $res{'to_mode'} = pop @{$res{'from_mode'}};
3604                 $res{'from_id'} = [ split(' ', $3) ];
3605                 $res{'to_id'} = pop @{$res{'from_id'}};
3606                 $res{'status'} = [ split('', $4) ];
3607                 $res{'to_file'} = unquote($5);
3608         }
3609         # 'c512b523472485aef4fff9e57b229d9d243c967f'
3610         elsif ($line =~ m/^([0-9a-fA-F]{40})$/) {
3611                 $res{'commit'} = $1;
3612         }
3613
3614         return wantarray ? %res : \%res;
3615 }
3616
3617 # wrapper: return parsed line of git-diff-tree "raw" output
3618 # (the argument might be raw line, or parsed info)
3619 sub parsed_difftree_line {
3620         my $line_or_ref = shift;
3621
3622         if (ref($line_or_ref) eq "HASH") {
3623                 # pre-parsed (or generated by hand)
3624                 return $line_or_ref;
3625         } else {
3626                 return parse_difftree_raw_line($line_or_ref);
3627         }
3628 }
3629
3630 # parse line of git-ls-tree output
3631 sub parse_ls_tree_line {
3632         my $line = shift;
3633         my %opts = @_;
3634         my %res;
3635
3636         if ($opts{'-l'}) {
3637                 #'100644 blob 0fa3f3a66fb6a137f6ec2c19351ed4d807070ffa   16717  panic.c'
3638                 $line =~ m/^([0-9]+) (.+) ([0-9a-fA-F]{40}) +(-|[0-9]+)\t(.+)$/s;
3639
3640                 $res{'mode'} = $1;
3641                 $res{'type'} = $2;
3642                 $res{'hash'} = $3;
3643                 $res{'size'} = $4;
3644                 if ($opts{'-z'}) {
3645                         $res{'name'} = $5;
3646                 } else {
3647                         $res{'name'} = unquote($5);
3648                 }
3649         } else {
3650                 #'100644 blob 0fa3f3a66fb6a137f6ec2c19351ed4d807070ffa  panic.c'
3651                 $line =~ m/^([0-9]+) (.+) ([0-9a-fA-F]{40})\t(.+)$/s;
3652
3653                 $res{'mode'} = $1;
3654                 $res{'type'} = $2;
3655                 $res{'hash'} = $3;
3656                 if ($opts{'-z'}) {
3657                         $res{'name'} = $4;
3658                 } else {
3659                         $res{'name'} = unquote($4);
3660                 }
3661         }
3662
3663         return wantarray ? %res : \%res;
3664 }
3665
3666 # generates _two_ hashes, references to which are passed as 2 and 3 argument
3667 sub parse_from_to_diffinfo {
3668         my ($diffinfo, $from, $to, @parents) = @_;
3669
3670         if ($diffinfo->{'nparents'}) {
3671                 # combined diff
3672                 $from->{'file'} = [];
3673                 $from->{'href'} = [];
3674                 fill_from_file_info($diffinfo, @parents)
3675                         unless exists $diffinfo->{'from_file'};
3676                 for (my $i = 0; $i < $diffinfo->{'nparents'}; $i++) {
3677                         $from->{'file'}[$i] =
3678                                 defined $diffinfo->{'from_file'}[$i] ?
3679                                         $diffinfo->{'from_file'}[$i] :
3680                                         $diffinfo->{'to_file'};
3681                         if ($diffinfo->{'status'}[$i] ne "A") { # not new (added) file
3682                                 $from->{'href'}[$i] = href(action=>"blob",
3683                                                            hash_base=>$parents[$i],
3684                                                            hash=>$diffinfo->{'from_id'}[$i],
3685                                                            file_name=>$from->{'file'}[$i]);
3686                         } else {
3687                                 $from->{'href'}[$i] = undef;
3688                         }
3689                 }
3690         } else {
3691                 # ordinary (not combined) diff
3692                 $from->{'file'} = $diffinfo->{'from_file'};
3693                 if ($diffinfo->{'status'} ne "A") { # not new (added) file
3694                         $from->{'href'} = href(action=>"blob", hash_base=>$hash_parent,
3695                                                hash=>$diffinfo->{'from_id'},
3696                                                file_name=>$from->{'file'});
3697                 } else {
3698                         delete $from->{'href'};
3699                 }
3700         }
3701
3702         $to->{'file'} = $diffinfo->{'to_file'};
3703         if (!is_deleted($diffinfo)) { # file exists in result
3704                 $to->{'href'} = href(action=>"blob", hash_base=>$hash,
3705                                      hash=>$diffinfo->{'to_id'},
3706                                      file_name=>$to->{'file'});
3707         } else {
3708                 delete $to->{'href'};
3709         }
3710 }
3711
3712 ## ......................................................................
3713 ## parse to array of hashes functions
3714
3715 sub git_get_heads_list {
3716         my ($limit, @classes) = @_;
3717         @classes = get_branch_refs() unless @classes;
3718         my @patterns = map { "refs/$_" } @classes;
3719         my @headslist;
3720
3721         open my $fd, '-|', git_cmd(), 'for-each-ref',
3722                 ($limit ? '--count='.($limit+1) : ()), '--sort=-committerdate',
3723                 '--format=%(objectname) %(refname) %(subject)%00%(committer)',
3724                 @patterns
3725                 or return;
3726         while (my $line = <$fd>) {
3727                 my %ref_item;
3728
3729                 chomp $line;
3730                 my ($refinfo, $committerinfo) = split(/\0/, $line);
3731                 my ($hash, $name, $title) = split(' ', $refinfo, 3);
3732                 my ($committer, $epoch, $tz) =
3733                         ($committerinfo =~ /^(.*) ([0-9]+) (.*)$/);
3734                 $ref_item{'fullname'}  = $name;
3735                 my $strip_refs = join '|', map { quotemeta } get_branch_refs();
3736                 $name =~ s!^refs/($strip_refs|remotes)/!!;
3737                 $ref_item{'name'} = $name;
3738                 # for refs neither in 'heads' nor 'remotes' we want to
3739                 # show their ref dir
3740                 my $ref_dir = (defined $1) ? $1 : '';
3741                 if ($ref_dir ne '' and $ref_dir ne 'heads' and $ref_dir ne 'remotes') {
3742                     $ref_item{'name'} .= ' (' . $ref_dir . ')';
3743                 }
3744
3745                 $ref_item{'id'}    = $hash;
3746                 $ref_item{'title'} = $title || '(no commit message)';
3747                 $ref_item{'epoch'} = $epoch;
3748                 if ($epoch) {
3749                         $ref_item{'age'} = age_string(time - $ref_item{'epoch'});
3750                 } else {
3751                         $ref_item{'age'} = "unknown";
3752                 }
3753
3754                 push @headslist, \%ref_item;
3755         }
3756         close $fd;
3757
3758         return wantarray ? @headslist : \@headslist;
3759 }
3760
3761 sub git_get_tags_list {
3762         my $limit = shift;
3763         my @tagslist;
3764
3765         open my $fd, '-|', git_cmd(), 'for-each-ref',
3766                 ($limit ? '--count='.($limit+1) : ()), '--sort=-creatordate',
3767                 '--format=%(objectname) %(objecttype) %(refname) '.
3768                 '%(*objectname) %(*objecttype) %(subject)%00%(creator)',
3769                 'refs/tags'
3770                 or return;
3771         while (my $line = <$fd>) {
3772                 my %ref_item;
3773
3774                 chomp $line;
3775                 my ($refinfo, $creatorinfo) = split(/\0/, $line);
3776                 my ($id, $type, $name, $refid, $reftype, $title) = split(' ', $refinfo, 6);
3777                 my ($creator, $epoch, $tz) =
3778                         ($creatorinfo =~ /^(.*) ([0-9]+) (.*)$/);
3779                 $ref_item{'fullname'} = $name;
3780                 $name =~ s!^refs/tags/!!;
3781
3782                 $ref_item{'type'} = $type;
3783                 $ref_item{'id'} = $id;
3784                 $ref_item{'name'} = $name;
3785                 if ($type eq "tag") {
3786                         $ref_item{'subject'} = $title;
3787                         $ref_item{'reftype'} = $reftype;
3788                         $ref_item{'refid'}   = $refid;
3789                 } else {
3790                         $ref_item{'reftype'} = $type;
3791                         $ref_item{'refid'}   = $id;
3792                 }
3793
3794                 if ($type eq "tag" || $type eq "commit") {
3795                         $ref_item{'epoch'} = $epoch;
3796                         if ($epoch) {
3797                                 $ref_item{'age'} = age_string(time - $ref_item{'epoch'});
3798                         } else {
3799                                 $ref_item{'age'} = "unknown";
3800                         }
3801                 }
3802
3803                 push @tagslist, \%ref_item;
3804         }
3805         close $fd;
3806
3807         return wantarray ? @tagslist : \@tagslist;
3808 }
3809
3810 ## ----------------------------------------------------------------------
3811 ## filesystem-related functions
3812
3813 sub get_file_owner {
3814         my $path = shift;
3815
3816         my ($dev, $ino, $mode, $nlink, $st_uid, $st_gid, $rdev, $size) = stat($path);
3817         my ($name, $passwd, $uid, $gid, $quota, $comment, $gcos, $dir, $shell) = getpwuid($st_uid);
3818         if (!defined $gcos) {
3819                 return undef;
3820         }
3821         my $owner = $gcos;
3822         $owner =~ s/[,;].*$//;
3823         return to_utf8($owner);
3824 }
3825
3826 # assume that file exists
3827 sub insert_file {
3828         my $filename = shift;
3829
3830         open my $fd, '<', $filename;
3831         print map { to_utf8($_) } <$fd>;
3832         close $fd;
3833 }
3834
3835 ## ......................................................................
3836 ## mimetype related functions
3837
3838 sub mimetype_guess_file {
3839         my $filename = shift;
3840         my $mimemap = shift;
3841         -r $mimemap or return undef;
3842
3843         my %mimemap;
3844         open(my $mh, '<', $mimemap) or return undef;
3845         while (<$mh>) {
3846                 next if m/^#/; # skip comments
3847                 my ($mimetype, @exts) = split(/\s+/);
3848                 foreach my $ext (@exts) {
3849                         $mimemap{$ext} = $mimetype;
3850                 }
3851         }
3852         close($mh);
3853
3854         $filename =~ /\.([^.]*)$/;
3855         return $mimemap{$1};
3856 }
3857
3858 sub mimetype_guess {
3859         my $filename = shift;
3860         my $mime;
3861         $filename =~ /\./ or return undef;
3862
3863         if ($mimetypes_file) {
3864                 my $file = $mimetypes_file;
3865                 if ($file !~ m!^/!) { # if it is relative path
3866                         # it is relative to project
3867                         $file = "$projectroot/$project/$file";
3868                 }
3869                 $mime = mimetype_guess_file($filename, $file);
3870         }
3871         $mime ||= mimetype_guess_file($filename, '/etc/mime.types');
3872         return $mime;
3873 }
3874
3875 sub blob_mimetype {
3876         my $fd = shift;
3877         my $filename = shift;
3878
3879         if ($filename) {
3880                 my $mime = mimetype_guess($filename);
3881                 $mime and return $mime;
3882         }
3883
3884         # just in case
3885         return $default_blob_plain_mimetype unless $fd;
3886
3887         if (-T $fd) {
3888                 return 'text/plain';
3889         } elsif (! $filename) {
3890                 return 'application/octet-stream';
3891         } elsif ($filename =~ m/\.png$/i) {
3892                 return 'image/png';
3893         } elsif ($filename =~ m/\.gif$/i) {
3894                 return 'image/gif';
3895         } elsif ($filename =~ m/\.jpe?g$/i) {
3896                 return 'image/jpeg';
3897         } else {
3898                 return 'application/octet-stream';
3899         }
3900 }
3901
3902 sub blob_contenttype {
3903         my ($fd, $file_name, $type) = @_;
3904
3905         $type ||= blob_mimetype($fd, $file_name);
3906         if ($type eq 'text/plain' && defined $default_text_plain_charset) {
3907                 $type .= "; charset=$default_text_plain_charset";
3908         }
3909
3910         return $type;
3911 }
3912
3913 # guess file syntax for syntax highlighting; return undef if no highlighting
3914 # the name of syntax can (in the future) depend on syntax highlighter used
3915 sub guess_file_syntax {
3916         my ($highlight, $mimetype, $file_name) = @_;
3917         return undef unless ($highlight && defined $file_name);
3918         my $basename = basename($file_name, '.in');
3919         return $highlight_basename{$basename}
3920                 if exists $highlight_basename{$basename};
3921
3922         $basename =~ /\.([^.]*)$/;
3923         my $ext = $1 or return undef;
3924         return $highlight_ext{$ext}
3925                 if exists $highlight_ext{$ext};
3926
3927         return undef;
3928 }
3929
3930 # run highlighter and return FD of its output,
3931 # or return original FD if no highlighting
3932 sub run_highlighter {
3933         my ($fd, $highlight, $syntax) = @_;
3934         return $fd unless ($highlight);
3935
3936         close $fd;
3937         my $syntax_arg = "--force";
3938         if ($syntax) {
3939                 $syntax_arg = "--syntax $syntax";
3940         }
3941         open $fd, quote_command(git_cmd(), "cat-file", "blob", $hash)." | ".
3942             quote_command($^X, '-CO', '-MEncode=decode,FB_DEFAULT', '-pse',
3943                           '$_ = decode($fe, $_, FB_DEFAULT) if !utf8::decode($_);',
3944                           '--', "-fe=$fallback_encoding")." | ".
3945             quote_command($highlight_bin).
3946             " --replace-tabs=8 --fragment $syntax_arg |"
3947             or die_error(500, "Couldn't open file or run syntax highlighter");
3948         return $fd;
3949 }
3950
3951 ## ======================================================================
3952 ## functions printing HTML: header, footer, error page
3953
3954 sub get_page_title {
3955         my $title = to_utf8($site_name);
3956
3957         unless (defined $project) {
3958                 if (defined $project_filter) {
3959                         $title .= " - projects in '" . esc_path($project_filter) . "'";
3960                 }
3961                 return $title;
3962         }
3963         $title .= " - " . to_utf8($project);
3964
3965         return $title unless (defined $action);
3966         $title .= "/$action"; # $action is US-ASCII (7bit ASCII)
3967
3968         return $title unless (defined $file_name);
3969         $title .= " - " . esc_path($file_name);
3970         if ($action eq "tree" && $file_name !~ m|/$|) {
3971                 $title .= "/";
3972         }
3973
3974         return $title;
3975 }
3976
3977 sub get_content_type_html {
3978         # require explicit support from the UA if we are to send the page as
3979         # 'application/xhtml+xml', otherwise send it as plain old 'text/html'.
3980         # we have to do this because MSIE sometimes globs '*/*', pretending to
3981         # support xhtml+xml but choking when it gets what it asked for.
3982         if (defined $cgi->http('HTTP_ACCEPT') &&
3983             $cgi->http('HTTP_ACCEPT') =~ m/(,|;|\s|^)application\/xhtml\+xml(,|;|\s|$)/ &&
3984             $cgi->Accept('application/xhtml+xml') != 0) {
3985                 return 'application/xhtml+xml';
3986         } else {
3987                 return 'text/html';
3988         }
3989 }
3990
3991 sub print_feed_meta {
3992         if (defined $project) {
3993                 my %href_params = get_feed_info();
3994                 if (!exists $href_params{'-title'}) {
3995                         $href_params{'-title'} = 'log';
3996                 }
3997
3998                 foreach my $format (qw(RSS Atom)) {
3999                         my $type = lc($format);
4000                         my %link_attr = (
4001                                 '-rel' => 'alternate',
4002                                 '-title' => esc_attr("$project - $href_params{'-title'} - $format feed"),
4003                                 '-type' => "application/$type+xml"
4004                         );
4005
4006                         $href_params{'extra_options'} = undef;
4007                         $href_params{'action'} = $type;
4008                         $link_attr{'-href'} = href(%href_params);
4009                         print "<link ".
4010                               "rel=\"$link_attr{'-rel'}\" ".
4011                               "title=\"$link_attr{'-title'}\" ".
4012                               "href=\"$link_attr{'-href'}\" ".
4013                               "type=\"$link_attr{'-type'}\" ".
4014                               "/>\n";
4015
4016                         $href_params{'extra_options'} = '--no-merges';
4017                         $link_attr{'-href'} = href(%href_params);
4018                         $link_attr{'-title'} .= ' (no merges)';
4019                         print "<link ".
4020                               "rel=\"$link_attr{'-rel'}\" ".
4021                               "title=\"$link_attr{'-title'}\" ".
4022                               "href=\"$link_attr{'-href'}\" ".
4023                               "type=\"$link_attr{'-type'}\" ".
4024                               "/>\n";
4025                 }
4026
4027         } else {
4028                 printf('<link rel="alternate" title="%s projects list" '.
4029                        'href="%s" type="text/plain; charset=utf-8" />'."\n",
4030                        esc_attr($site_name), href(project=>undef, action=>"project_index"));
4031                 printf('<link rel="alternate" title="%s projects feeds" '.
4032                        'href="%s" type="text/x-opml" />'."\n",
4033                        esc_attr($site_name), href(project=>undef, action=>"opml"));
4034         }
4035 }
4036
4037 sub print_header_links {
4038         my $status = shift;
4039
4040         # print out each stylesheet that exist, providing backwards capability
4041         # for those people who defined $stylesheet in a config file
4042         if (defined $stylesheet) {
4043                 print '<link rel="stylesheet" type="text/css" href="'.esc_url($stylesheet).'"/>'."\n";
4044         } else {
4045                 foreach my $stylesheet (@stylesheets) {
4046                         next unless $stylesheet;
4047                         print '<link rel="stylesheet" type="text/css" href="'.esc_url($stylesheet).'"/>'."\n";
4048                 }
4049         }
4050         print_feed_meta()
4051                 if ($status eq '200 OK');
4052         if (defined $favicon) {
4053                 print qq(<link rel="shortcut icon" href=").esc_url($favicon).qq(" type="image/png" />\n);
4054         }
4055 }
4056
4057 sub print_nav_breadcrumbs_path {
4058         my $dirprefix = undef;
4059         while (my $part = shift) {
4060                 $dirprefix .= "/" if defined $dirprefix;
4061                 $dirprefix .= $part;
4062                 print $cgi->a({-href => href(project => undef,
4063                                              project_filter => $dirprefix,
4064                                              action => "project_list")},
4065                               esc_html($part)) . " / ";
4066         }
4067 }
4068
4069 sub print_nav_breadcrumbs {
4070         my %opts = @_;
4071
4072         for my $crumb (@extra_breadcrumbs, [ $home_link_str => $home_link ]) {
4073                 print $cgi->a({-href => esc_url($crumb->[1])}, $crumb->[0]) . " / ";
4074         }
4075         if (defined $project) {
4076                 my @dirname = split '/', $project;
4077                 my $projectbasename = pop @dirname;
4078                 print_nav_breadcrumbs_path(@dirname);
4079                 print $cgi->a({-href => href(action=>"summary")}, esc_html($projectbasename));
4080                 if (defined $action) {
4081                         my $action_print = $action ;
4082                         if (defined $opts{-action_extra}) {
4083                                 $action_print = $cgi->a({-href => href(action=>$action)},
4084                                         $action);
4085                         }
4086                         print " / $action_print";
4087                 }
4088                 if (defined $opts{-action_extra}) {
4089                         print " / $opts{-action_extra}";
4090                 }
4091                 print "\n";
4092         } elsif (defined $project_filter) {
4093                 print_nav_breadcrumbs_path(split '/', $project_filter);
4094         }
4095 }
4096
4097 sub print_search_form {
4098         if (!defined $searchtext) {
4099                 $searchtext = "";
4100         }
4101         my $search_hash;
4102         if (defined $hash_base) {
4103                 $search_hash = $hash_base;
4104         } elsif (defined $hash) {
4105                 $search_hash = $hash;
4106         } else {
4107                 $search_hash = "HEAD";
4108         }
4109         my $action = $my_uri;
4110         my $use_pathinfo = gitweb_check_feature('pathinfo');
4111         if ($use_pathinfo) {
4112                 $action .= "/".esc_url($project);
4113         }
4114         print $cgi->start_form(-method => "get", -action => $action) .
4115               "<div class=\"search\">\n" .
4116               (!$use_pathinfo &&
4117               $cgi->input({-name=>"p", -value=>$project, -type=>"hidden"}) . "\n") .
4118               $cgi->input({-name=>"a", -value=>"search", -type=>"hidden"}) . "\n" .
4119               $cgi->input({-name=>"h", -value=>$search_hash, -type=>"hidden"}) . "\n" .
4120               $cgi->popup_menu(-name => 'st', -default => 'commit',
4121                                -values => ['commit', 'grep', 'author', 'committer', 'pickaxe']) .
4122               " " . $cgi->a({-href => href(action=>"search_help"),
4123                              -title => "search help" }, "?") . " search:\n",
4124               $cgi->textfield(-name => "s", -value => $searchtext, -override => 1) . "\n" .
4125               "<span title=\"Extended regular expression\">" .
4126               $cgi->checkbox(-name => 'sr', -value => 1, -label => 're',
4127                              -checked => $search_use_regexp) .
4128               "</span>" .
4129               "</div>" .
4130               $cgi->end_form() . "\n";
4131 }
4132
4133 sub git_header_html {
4134         my $status = shift || "200 OK";
4135         my $expires = shift;
4136         my %opts = @_;
4137
4138         my $title = get_page_title();
4139         my $content_type = get_content_type_html();
4140         print $cgi->header(-type=>$content_type, -charset => 'utf-8',
4141                            -status=> $status, -expires => $expires)
4142                 unless ($opts{'-no_http_header'});
4143         my $mod_perl_version = $ENV{'MOD_PERL'} ? " $ENV{'MOD_PERL'}" : '';
4144         print <<EOF;
4145 <?xml version="1.0" encoding="utf-8"?>
4146 <!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Strict//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-strict.dtd">
4147 <html xmlns="http://www.w3.org/1999/xhtml" xml:lang="en-US" lang="en-US">
4148 <!-- git web interface version $version, (C) 2005-2006, Kay Sievers <kay.sievers\@vrfy.org>, Christian Gierke -->
4149 <!-- git core binaries version $git_version -->
4150 <head>
4151 <meta http-equiv="content-type" content="$content_type; charset=utf-8"/>
4152 <meta name="generator" content="gitweb/$version git/$git_version$mod_perl_version"/>
4153 <meta name="robots" content="index, nofollow"/>
4154 <title>$title</title>
4155 EOF
4156         # the stylesheet, favicon etc urls won't work correctly with path_info
4157         # unless we set the appropriate base URL
4158         if ($ENV{'PATH_INFO'}) {
4159                 print "<base href=\"".esc_url($base_url)."\" />\n";
4160         }
4161         print_header_links($status);
4162
4163         if (defined $site_html_head_string) {
4164                 print to_utf8($site_html_head_string);
4165         }
4166
4167         print "</head>\n" .
4168               "<body>\n";
4169
4170         if (defined $site_header && -f $site_header) {
4171                 insert_file($site_header);
4172         }
4173
4174         print "<div class=\"page_header\">\n";
4175         if (defined $logo) {
4176                 print $cgi->a({-href => esc_url($logo_url),
4177                                -title => $logo_label},
4178                               $cgi->img({-src => esc_url($logo),
4179                                          -width => 72, -height => 27,
4180                                          -alt => "git",
4181                                          -class => "logo"}));
4182         }
4183         print_nav_breadcrumbs(%opts);
4184         print "</div>\n";
4185
4186         my $have_search = gitweb_check_feature('search');
4187         if (defined $project && $have_search) {
4188                 print_search_form();
4189         }
4190 }
4191
4192 sub git_footer_html {
4193         my $feed_class = 'rss_logo';
4194
4195         print "<div class=\"page_footer\">\n";
4196         if (defined $project) {
4197                 my $descr = git_get_project_description($project);
4198                 if (defined $descr) {
4199                         print "<div class=\"page_footer_text\">" . esc_html($descr) . "</div>\n";
4200                 }
4201
4202                 my %href_params = get_feed_info();
4203                 if (!%href_params) {
4204                         $feed_class .= ' generic';
4205                 }
4206                 $href_params{'-title'} ||= 'log';
4207
4208                 foreach my $format (qw(RSS Atom)) {
4209                         $href_params{'action'} = lc($format);
4210                         print $cgi->a({-href => href(%href_params),
4211                                       -title => "$href_params{'-title'} $format feed",
4212                                       -class => $feed_class}, $format)."\n";
4213                 }
4214
4215         } else {
4216                 print $cgi->a({-href => href(project=>undef, action=>"opml",
4217                                              project_filter => $project_filter),
4218                               -class => $feed_class}, "OPML") . " ";
4219                 print $cgi->a({-href => href(project=>undef, action=>"project_index",
4220                                              project_filter => $project_filter),
4221                               -class => $feed_class}, "TXT") . "\n";
4222         }
4223         print "</div>\n"; # class="page_footer"
4224
4225         if (defined $t0 && gitweb_check_feature('timed')) {
4226                 print "<div id=\"generating_info\">\n";
4227                 print 'This page took '.
4228                       '<span id="generating_time" class="time_span">'.
4229                       tv_interval($t0, [ gettimeofday() ]).
4230                       ' seconds </span>'.
4231                       ' and '.
4232                       '<span id="generating_cmd">'.
4233                       $number_of_git_cmds.
4234                       '</span> git commands '.
4235                       " to generate.\n";
4236                 print "</div>\n"; # class="page_footer"
4237         }
4238
4239         if (defined $site_footer && -f $site_footer) {
4240                 insert_file($site_footer);
4241         }
4242
4243         print qq!<script type="text/javascript" src="!.esc_url($javascript).qq!"></script>\n!;
4244         if (defined $action &&
4245             $action eq 'blame_incremental') {
4246                 print qq!<script type="text/javascript">\n!.
4247                       qq!startBlame("!. href(action=>"blame_data", -replay=>1) .qq!",\n!.
4248                       qq!           "!. href() .qq!");\n!.
4249                       qq!</script>\n!;
4250         } else {
4251                 my ($jstimezone, $tz_cookie, $datetime_class) =
4252                         gitweb_get_feature('javascript-timezone');
4253
4254                 print qq!<script type="text/javascript">\n!.
4255                       qq!window.onload = function () {\n!;
4256                 if (gitweb_check_feature('javascript-actions')) {
4257                         print qq!       fixLinks();\n!;
4258                 }
4259                 if ($jstimezone && $tz_cookie && $datetime_class) {
4260                         print qq!       var tz_cookie = { name: '$tz_cookie', expires: 14, path: '/' };\n!. # in days
4261                               qq!       onloadTZSetup('$jstimezone', tz_cookie, '$datetime_class');\n!;
4262                 }
4263                 print qq!};\n!.
4264                       qq!</script>\n!;
4265         }
4266
4267         print "</body>\n" .
4268               "</html>";
4269 }
4270
4271 # die_error(<http_status_code>, <error_message>[, <detailed_html_description>])
4272 # Example: die_error(404, 'Hash not found')
4273 # By convention, use the following status codes (as defined in RFC 2616):
4274 # 400: Invalid or missing CGI parameters, or
4275 #      requested object exists but has wrong type.
4276 # 403: Requested feature (like "pickaxe" or "snapshot") not enabled on
4277 #      this server or project.
4278 # 404: Requested object/revision/project doesn't exist.
4279 # 500: The server isn't configured properly, or
4280 #      an internal error occurred (e.g. failed assertions caused by bugs), or
4281 #      an unknown error occurred (e.g. the git binary died unexpectedly).
4282 # 503: The server is currently unavailable (because it is overloaded,
4283 #      or down for maintenance).  Generally, this is a temporary state.
4284 sub die_error {
4285         my $status = shift || 500;
4286         my $error = esc_html(shift) || "Internal Server Error";
4287         my $extra = shift;
4288         my %opts = @_;
4289
4290         my %http_responses = (
4291                 400 => '400 Bad Request',
4292                 403 => '403 Forbidden',
4293                 404 => '404 Not Found',
4294                 500 => '500 Internal Server Error',
4295                 503 => '503 Service Unavailable',
4296         );
4297         git_header_html($http_responses{$status}, undef, %opts);
4298         print <<EOF;
4299 <div class="page_body">
4300 <br /><br />
4301 $status - $error
4302 <br />
4303 EOF
4304         if (defined $extra) {
4305                 print "<hr />\n" .
4306                       "$extra\n";
4307         }
4308         print "</div>\n";
4309
4310         git_footer_html();
4311         goto DONE_GITWEB
4312                 unless ($opts{'-error_handler'});
4313 }
4314
4315 ## ----------------------------------------------------------------------
4316 ## functions printing or outputting HTML: navigation
4317
4318 sub git_print_page_nav {
4319         my ($current, $suppress, $head, $treehead, $treebase, $extra) = @_;
4320         $extra = '' if !defined $extra; # pager or formats
4321
4322         my @navs = qw(summary shortlog log commit commitdiff tree);
4323         if ($suppress) {
4324                 @navs = grep { $_ ne $suppress } @navs;
4325         }
4326
4327         my %arg = map { $_ => {action=>$_} } @navs;
4328         if (defined $head) {
4329                 for (qw(commit commitdiff)) {
4330                         $arg{$_}{'hash'} = $head;
4331                 }
4332                 if ($current =~ m/^(tree | log | shortlog | commit | commitdiff | search)$/x) {
4333                         for (qw(shortlog log)) {
4334                                 $arg{$_}{'hash'} = $head;
4335                         }
4336                 }
4337         }
4338
4339         $arg{'tree'}{'hash'} = $treehead if defined $treehead;
4340         $arg{'tree'}{'hash_base'} = $treebase if defined $treebase;
4341
4342         my @actions = gitweb_get_feature('actions');
4343         my %repl = (
4344                 '%' => '%',
4345                 'n' => $project,         # project name
4346                 'f' => $git_dir,         # project path within filesystem
4347                 'h' => $treehead || '',  # current hash ('h' parameter)
4348                 'b' => $treebase || '',  # hash base ('hb' parameter)
4349         );
4350         while (@actions) {
4351                 my ($label, $link, $pos) = splice(@actions,0,3);
4352                 # insert
4353                 @navs = map { $_ eq $pos ? ($_, $label) : $_ } @navs;
4354                 # munch munch
4355                 $link =~ s/%([%nfhb])/$repl{$1}/g;
4356                 $arg{$label}{'_href'} = $link;
4357         }
4358
4359         print "<div class=\"page_nav\">\n" .
4360                 (join " | ",
4361                  map { $_ eq $current ?
4362                        $_ : $cgi->a({-href => ($arg{$_}{_href} ? $arg{$_}{_href} : href(%{$arg{$_}}))}, "$_")
4363                  } @navs);
4364         print "<br/>\n$extra<br/>\n" .
4365               "</div>\n";
4366 }
4367
4368 # returns a submenu for the nagivation of the refs views (tags, heads,
4369 # remotes) with the current view disabled and the remotes view only
4370 # available if the feature is enabled
4371 sub format_ref_views {
4372         my ($current) = @_;
4373         my @ref_views = qw{tags heads};
4374         push @ref_views, 'remotes' if gitweb_check_feature('remote_heads');
4375         return join " | ", map {
4376                 $_ eq $current ? $_ :
4377                 $cgi->a({-href => href(action=>$_)}, $_)
4378         } @ref_views
4379 }
4380
4381 sub format_paging_nav {
4382         my ($action, $page, $has_next_link) = @_;
4383         my $paging_nav;
4384
4385
4386         if ($page > 0) {
4387                 $paging_nav .=
4388                         $cgi->a({-href => href(-replay=>1, page=>undef)}, "first") .
4389                         " &sdot; " .
4390                         $cgi->a({-href => href(-replay=>1, page=>$page-1),
4391                                  -accesskey => "p", -title => "Alt-p"}, "prev");
4392         } else {
4393                 $paging_nav .= "first &sdot; prev";
4394         }
4395
4396         if ($has_next_link) {
4397                 $paging_nav .= " &sdot; " .
4398                         $cgi->a({-href => href(-replay=>1, page=>$page+1),
4399                                  -accesskey => "n", -title => "Alt-n"}, "next");
4400         } else {
4401                 $paging_nav .= " &sdot; next";
4402         }
4403
4404         return $paging_nav;
4405 }
4406
4407 ## ......................................................................
4408 ## functions printing or outputting HTML: div
4409
4410 sub git_print_header_div {
4411         my ($action, $title, $hash, $hash_base) = @_;
4412         my %args = ();
4413
4414         $args{'action'} = $action;
4415         $args{'hash'} = $hash if $hash;
4416         $args{'hash_base'} = $hash_base if $hash_base;
4417
4418         print "<div class=\"header\">\n" .
4419               $cgi->a({-href => href(%args), -class => "title"},
4420               $title ? $title : $action) .
4421               "\n</div>\n";
4422 }
4423
4424 sub format_repo_url {
4425         my ($name, $url) = @_;
4426         return "<tr class=\"metadata_url\"><td>$name</td><td>$url</td></tr>\n";
4427 }
4428
4429 # Group output by placing it in a DIV element and adding a header.
4430 # Options for start_div() can be provided by passing a hash reference as the
4431 # first parameter to the function.
4432 # Options to git_print_header_div() can be provided by passing an array
4433 # reference. This must follow the options to start_div if they are present.
4434 # The content can be a scalar, which is output as-is, a scalar reference, which
4435 # is output after html escaping, an IO handle passed either as *handle or
4436 # *handle{IO}, or a function reference. In the latter case all following
4437 # parameters will be taken as argument to the content function call.
4438 sub git_print_section {
4439         my ($div_args, $header_args, $content);
4440         my $arg = shift;
4441         if (ref($arg) eq 'HASH') {
4442                 $div_args = $arg;
4443                 $arg = shift;
4444         }
4445         if (ref($arg) eq 'ARRAY') {
4446                 $header_args = $arg;
4447                 $arg = shift;
4448         }
4449         $content = $arg;
4450
4451         print $cgi->start_div($div_args);
4452         git_print_header_div(@$header_args);
4453
4454         if (ref($content) eq 'CODE') {
4455                 $content->(@_);
4456         } elsif (ref($content) eq 'SCALAR') {
4457                 print esc_html($$content);
4458         } elsif (ref($content) eq 'GLOB' or ref($content) eq 'IO::Handle') {
4459                 print <$content>;
4460         } elsif (!ref($content) && defined($content)) {
4461                 print $content;
4462         }
4463
4464         print $cgi->end_div;
4465 }
4466
4467 sub format_timestamp_html {
4468         my $date = shift;
4469         my $strtime = $date->{'rfc2822'};
4470
4471         my (undef, undef, $datetime_class) =
4472                 gitweb_get_feature('javascript-timezone');
4473         if ($datetime_class) {
4474                 $strtime = qq!<span class="$datetime_class">$strtime</span>!;
4475         }
4476
4477         my $localtime_format = '(%02d:%02d %s)';
4478         if ($date->{'hour_local'} < 6) {
4479                 $localtime_format = '(<span class="atnight">%02d:%02d</span> %s)';
4480         }
4481         $strtime .= ' ' .
4482                     sprintf($localtime_format,
4483                             $date->{'hour_local'}, $date->{'minute_local'}, $date->{'tz_local'});
4484
4485         return $strtime;
4486 }
4487
4488 # Outputs the author name and date in long form
4489 sub git_print_authorship {
4490         my $co = shift;
4491         my %opts = @_;
4492         my $tag = $opts{-tag} || 'div';
4493         my $author = $co->{'author_name'};
4494
4495         my %ad = parse_date($co->{'author_epoch'}, $co->{'author_tz'});
4496         print "<$tag class=\"author_date\">" .
4497               format_search_author($author, "author", esc_html($author)) .
4498               " [".format_timestamp_html(\%ad)."]".
4499               git_get_avatar($co->{'author_email'}, -pad_before => 1) .
4500               "</$tag>\n";
4501 }
4502
4503 # Outputs table rows containing the full author or committer information,
4504 # in the format expected for 'commit' view (& similar).
4505 # Parameters are a commit hash reference, followed by the list of people
4506 # to output information for. If the list is empty it defaults to both
4507 # author and committer.
4508 sub git_print_authorship_rows {
4509         my $co = shift;
4510         # too bad we can't use @people = @_ || ('author', 'committer')
4511         my @people = @_;
4512         @people = ('author', 'committer') unless @people;
4513         foreach my $who (@people) {
4514                 my %wd = parse_date($co->{"${who}_epoch"}, $co->{"${who}_tz"});
4515                 print "<tr><td>$who</td><td>" .
4516                       format_search_author($co->{"${who}_name"}, $who,
4517                                            esc_html($co->{"${who}_name"})) . " " .
4518                       format_search_author($co->{"${who}_email"}, $who,
4519                                            esc_html("<" . $co->{"${who}_email"} . ">")) .
4520                       "</td><td rowspan=\"2\">" .
4521                       git_get_avatar($co->{"${who}_email"}, -size => 'double') .
4522                       "</td></tr>\n" .
4523                       "<tr>" .
4524                       "<td></td><td>" .
4525                       format_timestamp_html(\%wd) .
4526                       "</td>" .
4527                       "</tr>\n";
4528         }
4529 }
4530
4531 sub git_print_page_path {
4532         my $name = shift;
4533         my $type = shift;
4534         my $hb = shift;
4535
4536
4537         print "<div class=\"page_path\">";
4538         print $cgi->a({-href => href(action=>"tree", hash_base=>$hb),
4539                       -title => 'tree root'}, to_utf8("[$project]"));
4540         print " / ";
4541         if (defined $name) {
4542                 my @dirname = split '/', $name;
4543                 my $basename = pop @dirname;
4544                 my $fullname = '';
4545
4546                 foreach my $dir (@dirname) {
4547                         $fullname .= ($fullname ? '/' : '') . $dir;
4548                         print $cgi->a({-href => href(action=>"tree", file_name=>$fullname,
4549                                                      hash_base=>$hb),
4550                                       -title => $fullname}, esc_path($dir));
4551                         print " / ";
4552                 }
4553                 if (defined $type && $type eq 'blob') {
4554                         print $cgi->a({-href => href(action=>"blob_plain", file_name=>$file_name,
4555                                                      hash_base=>$hb),
4556                                       -title => $name}, esc_path($basename));
4557                 } elsif (defined $type && $type eq 'tree') {
4558                         print $cgi->a({-href => href(action=>"tree", file_name=>$file_name,
4559                                                      hash_base=>$hb),
4560                                       -title => $name}, esc_path($basename));
4561                         print " / ";
4562                 } else {
4563                         print esc_path($basename);
4564                 }
4565         }
4566         print "<br/></div>\n";
4567 }
4568
4569 sub git_print_log {
4570         my $log = shift;
4571         my %opts = @_;
4572
4573         if ($opts{'-remove_title'}) {
4574                 # remove title, i.e. first line of log
4575                 shift @$log;
4576         }
4577         # remove leading empty lines
4578         while (defined $log->[0] && $log->[0] eq "") {
4579                 shift @$log;
4580         }
4581
4582         # print log
4583         my $skip_blank_line = 0;
4584         foreach my $line (@$log) {
4585                 if ($line =~ m/^\s*([A-Z][-A-Za-z]*-[Bb]y|C[Cc]): /) {
4586                         if (! $opts{'-remove_signoff'}) {
4587                                 print "<span class=\"signoff\">" . esc_html($line) . "</span><br/>\n";
4588                                 $skip_blank_line = 1;
4589                         }
4590                         next;
4591                 }
4592
4593                 if ($line =~ m,\s*([a-z]*link): (https?://\S+),i) {
4594                         if (! $opts{'-remove_signoff'}) {
4595                                 print "<span class=\"signoff\">" . esc_html($1) . ": " .
4596                                         "<a href=\"" . esc_html($2) . "\">" . esc_html($2) . "</a>" .
4597                                         "</span><br/>\n";
4598                                 $skip_blank_line = 1;
4599                         }
4600                         next;
4601                 }
4602
4603                 # print only one empty line
4604                 # do not print empty line after signoff
4605                 if ($line eq "") {
4606                         next if ($skip_blank_line);
4607                         $skip_blank_line = 1;
4608                 } else {
4609                         $skip_blank_line = 0;
4610                 }
4611
4612                 print format_log_line_html($line) . "<br/>\n";
4613         }
4614
4615         if ($opts{'-final_empty_line'}) {
4616                 # end with single empty line
4617                 print "<br/>\n" unless $skip_blank_line;
4618         }
4619 }
4620
4621 # return link target (what link points to)
4622 sub git_get_link_target {
4623         my $hash = shift;
4624         my $link_target;
4625
4626         # read link
4627         open my $fd, "-|", git_cmd(), "cat-file", "blob", $hash
4628                 or return;
4629         {
4630                 local $/ = undef;
4631                 $link_target = <$fd>;
4632         }
4633         close $fd
4634                 or return;
4635
4636         return $link_target;
4637 }
4638
4639 # given link target, and the directory (basedir) the link is in,
4640 # return target of link relative to top directory (top tree);
4641 # return undef if it is not possible (including absolute links).
4642 sub normalize_link_target {
4643         my ($link_target, $basedir) = @_;
4644
4645         # absolute symlinks (beginning with '/') cannot be normalized
4646         return if (substr($link_target, 0, 1) eq '/');
4647
4648         # normalize link target to path from top (root) tree (dir)
4649         my $path;
4650         if ($basedir) {
4651                 $path = $basedir . '/' . $link_target;
4652         } else {
4653                 # we are in top (root) tree (dir)
4654                 $path = $link_target;
4655         }
4656
4657         # remove //, /./, and /../
4658         my @path_parts;
4659         foreach my $part (split('/', $path)) {
4660                 # discard '.' and ''
4661                 next if (!$part || $part eq '.');
4662                 # handle '..'
4663                 if ($part eq '..') {
4664                         if (@path_parts) {
4665                                 pop @path_parts;
4666                         } else {
4667                                 # link leads outside repository (outside top dir)
4668                                 return;
4669                         }
4670                 } else {
4671                         push @path_parts, $part;
4672                 }
4673         }
4674         $path = join('/', @path_parts);
4675
4676         return $path;
4677 }
4678
4679 # print tree entry (row of git_tree), but without encompassing <tr> element
4680 sub git_print_tree_entry {
4681         my ($t, $basedir, $hash_base, $have_blame) = @_;
4682
4683         my %base_key = ();
4684         $base_key{'hash_base'} = $hash_base if defined $hash_base;
4685
4686         # The format of a table row is: mode list link.  Where mode is
4687         # the mode of the entry, list is the name of the entry, an href,
4688         # and link is the action links of the entry.
4689
4690         print "<td class=\"mode\">" . mode_str($t->{'mode'}) . "</td>\n";
4691         if (exists $t->{'size'}) {
4692                 print "<td class=\"size\">$t->{'size'}</td>\n";
4693         }
4694         if ($t->{'type'} eq "blob") {
4695                 print "<td class=\"list\">" .
4696                         $cgi->a({-href => href(action=>"blob", hash=>$t->{'hash'},
4697                                                file_name=>"$basedir$t->{'name'}", %base_key),
4698                                 -class => "list"}, esc_path($t->{'name'}));
4699                 if (S_ISLNK(oct $t->{'mode'})) {
4700                         my $link_target = git_get_link_target($t->{'hash'});
4701                         if ($link_target) {
4702                                 my $norm_target = normalize_link_target($link_target, $basedir);
4703                                 if (defined $norm_target) {
4704                                         print " -> " .
4705                                               $cgi->a({-href => href(action=>"object", hash_base=>$hash_base,
4706                                                                      file_name=>$norm_target),
4707                                                        -title => $norm_target}, esc_path($link_target));
4708                                 } else {
4709                                         print " -> " . esc_path($link_target);
4710                                 }
4711                         }
4712                 }
4713                 print "</td>\n";
4714                 print "<td class=\"link\">";
4715                 print $cgi->a({-href => href(action=>"blob", hash=>$t->{'hash'},
4716                                              file_name=>"$basedir$t->{'name'}", %base_key)},
4717                               "blob");
4718                 if ($have_blame) {
4719                         print " | " .
4720                               $cgi->a({-href => href(action=>"blame", hash=>$t->{'hash'},
4721                                                      file_name=>"$basedir$t->{'name'}", %base_key)},
4722                                       "blame");
4723                 }
4724                 if (defined $hash_base) {
4725                         print " | " .
4726                               $cgi->a({-href => href(action=>"history", hash_base=>$hash_base,
4727                                                      hash=>$t->{'hash'}, file_name=>"$basedir$t->{'name'}")},
4728                                       "history");
4729                 }
4730                 print " | " .
4731                         $cgi->a({-href => href(action=>"blob_plain", hash_base=>$hash_base,
4732                                                file_name=>"$basedir$t->{'name'}")},
4733                                 "raw");
4734                 print "</td>\n";
4735
4736         } elsif ($t->{'type'} eq "tree") {
4737                 print "<td class=\"list\">";
4738                 print $cgi->a({-href => href(action=>"tree", hash=>$t->{'hash'},
4739                                              file_name=>"$basedir$t->{'name'}",
4740                                              %base_key)},
4741                               esc_path($t->{'name'}));
4742                 print "</td>\n";
4743                 print "<td class=\"link\">";
4744                 print $cgi->a({-href => href(action=>"tree", hash=>$t->{'hash'},
4745                                              file_name=>"$basedir$t->{'name'}",
4746                                              %base_key)},
4747                               "tree");
4748                 if (defined $hash_base) {
4749                         print " | " .
4750                               $cgi->a({-href => href(action=>"history", hash_base=>$hash_base,
4751                                                      file_name=>"$basedir$t->{'name'}")},
4752                                       "history");
4753                 }
4754                 print "</td>\n";
4755         } else {
4756                 # unknown object: we can only present history for it
4757                 # (this includes 'commit' object, i.e. submodule support)
4758                 print "<td class=\"list\">" .
4759                       esc_path($t->{'name'}) .
4760                       "</td>\n";
4761                 print "<td class=\"link\">";
4762                 if (defined $hash_base) {
4763                         print $cgi->a({-href => href(action=>"history",
4764                                                      hash_base=>$hash_base,
4765                                                      file_name=>"$basedir$t->{'name'}")},
4766                                       "history");
4767                 }
4768                 print "</td>\n";
4769         }
4770 }
4771
4772 ## ......................................................................
4773 ## functions printing large fragments of HTML
4774
4775 # get pre-image filenames for merge (combined) diff
4776 sub fill_from_file_info {
4777         my ($diff, @parents) = @_;
4778
4779         $diff->{'from_file'} = [ ];
4780         $diff->{'from_file'}[$diff->{'nparents'} - 1] = undef;
4781         for (my $i = 0; $i < $diff->{'nparents'}; $i++) {
4782                 if ($diff->{'status'}[$i] eq 'R' ||
4783                     $diff->{'status'}[$i] eq 'C') {
4784                         $diff->{'from_file'}[$i] =
4785                                 git_get_path_by_hash($parents[$i], $diff->{'from_id'}[$i]);
4786                 }
4787         }
4788
4789         return $diff;
4790 }
4791
4792 # is current raw difftree line of file deletion
4793 sub is_deleted {
4794         my $diffinfo = shift;
4795
4796         return $diffinfo->{'to_id'} eq ('0' x 40);
4797 }
4798
4799 # does patch correspond to [previous] difftree raw line
4800 # $diffinfo  - hashref of parsed raw diff format
4801 # $patchinfo - hashref of parsed patch diff format
4802 #              (the same keys as in $diffinfo)
4803 sub is_patch_split {
4804         my ($diffinfo, $patchinfo) = @_;
4805
4806         return defined $diffinfo && defined $patchinfo
4807                 && $diffinfo->{'to_file'} eq $patchinfo->{'to_file'};
4808 }
4809
4810
4811 sub git_difftree_body {
4812         my ($difftree, $hash, @parents) = @_;
4813         my ($parent) = $parents[0];
4814         my $have_blame = gitweb_check_feature('blame');
4815         print "<div class=\"list_head\">\n";
4816         if ($#{$difftree} > 10) {
4817                 print(($#{$difftree} + 1) . " files changed:\n");
4818         }
4819         print "</div>\n";
4820
4821         print "<table class=\"" .
4822               (@parents > 1 ? "combined " : "") .
4823               "diff_tree\">\n";
4824
4825         # header only for combined diff in 'commitdiff' view
4826         my $has_header = @$difftree && @parents > 1 && $action eq 'commitdiff';
4827         if ($has_header) {
4828                 # table header
4829                 print "<thead><tr>\n" .
4830                        "<th></th><th></th>\n"; # filename, patchN link
4831                 for (my $i = 0; $i < @parents; $i++) {
4832                         my $par = $parents[$i];
4833                         print "<th>" .
4834                               $cgi->a({-href => href(action=>"commitdiff",
4835                                                      hash=>$hash, hash_parent=>$par),
4836                                        -title => 'commitdiff to parent number ' .
4837                                                   ($i+1) . ': ' . substr($par,0,7)},
4838                                       $i+1) .
4839                               "&nbsp;</th>\n";
4840                 }
4841                 print "</tr></thead>\n<tbody>\n";
4842         }
4843
4844         my $alternate = 1;
4845         my $patchno = 0;
4846         foreach my $line (@{$difftree}) {
4847                 my $diff = parsed_difftree_line($line);
4848
4849                 if ($alternate) {
4850                         print "<tr class=\"dark\">\n";
4851                 } else {
4852                         print "<tr class=\"light\">\n";
4853                 }
4854                 $alternate ^= 1;
4855
4856                 if (exists $diff->{'nparents'}) { # combined diff
4857
4858                         fill_from_file_info($diff, @parents)
4859                                 unless exists $diff->{'from_file'};
4860
4861                         if (!is_deleted($diff)) {
4862                                 # file exists in the result (child) commit
4863                                 print "<td>" .
4864                                       $cgi->a({-href => href(action=>"blob", hash=>$diff->{'to_id'},
4865                                                              file_name=>$diff->{'to_file'},
4866                                                              hash_base=>$hash),
4867                                               -class => "list"}, esc_path($diff->{'to_file'})) .
4868                                       "</td>\n";
4869                         } else {
4870                                 print "<td>" .
4871                                       esc_path($diff->{'to_file'}) .
4872                                       "</td>\n";
4873                         }
4874
4875                         if ($action eq 'commitdiff') {
4876                                 # link to patch
4877                                 $patchno++;
4878                                 print "<td class=\"link\">" .
4879                                       $cgi->a({-href => href(-anchor=>"patch$patchno")},
4880                                               "patch") .
4881                                       " | " .
4882                                       "</td>\n";
4883                         }
4884
4885                         my $has_history = 0;
4886                         my $not_deleted = 0;
4887                         for (my $i = 0; $i < $diff->{'nparents'}; $i++) {
4888                                 my $hash_parent = $parents[$i];
4889                                 my $from_hash = $diff->{'from_id'}[$i];
4890                                 my $from_path = $diff->{'from_file'}[$i];
4891                                 my $status = $diff->{'status'}[$i];
4892
4893                                 $has_history ||= ($status ne 'A');
4894                                 $not_deleted ||= ($status ne 'D');
4895
4896                                 if ($status eq 'A') {
4897                                         print "<td  class=\"link\" align=\"right\"> | </td>\n";
4898                                 } elsif ($status eq 'D') {
4899                                         print "<td class=\"link\">" .
4900                                               $cgi->a({-href => href(action=>"blob",
4901                                                                      hash_base=>$hash,
4902                                                                      hash=>$from_hash,
4903                                                                      file_name=>$from_path)},
4904                                                       "blob" . ($i+1)) .
4905                                               " | </td>\n";
4906                                 } else {
4907                                         if ($diff->{'to_id'} eq $from_hash) {
4908                                                 print "<td class=\"link nochange\">";
4909                                         } else {
4910                                                 print "<td class=\"link\">";
4911                                         }
4912                                         print $cgi->a({-href => href(action=>"blobdiff",
4913                                                                      hash=>$diff->{'to_id'},
4914                                                                      hash_parent=>$from_hash,
4915                                                                      hash_base=>$hash,
4916                                                                      hash_parent_base=>$hash_parent,
4917                                                                      file_name=>$diff->{'to_file'},
4918                                                                      file_parent=>$from_path)},
4919                                                       "diff" . ($i+1)) .
4920                                               " | </td>\n";
4921                                 }
4922                         }
4923
4924                         print "<td class=\"link\">";
4925                         if ($not_deleted) {
4926                                 print $cgi->a({-href => href(action=>"blob",
4927                                                              hash=>$diff->{'to_id'},
4928                                                              file_name=>$diff->{'to_file'},
4929                                                              hash_base=>$hash)},
4930                                               "blob");
4931                                 print " | " if ($has_history);
4932                         }
4933                         if ($has_history) {
4934                                 print $cgi->a({-href => href(action=>"history",
4935                                                              file_name=>$diff->{'to_file'},
4936                                                              hash_base=>$hash)},
4937                                               "history");
4938                         }
4939                         print "</td>\n";
4940
4941                         print "</tr>\n";
4942                         next; # instead of 'else' clause, to avoid extra indent
4943                 }
4944                 # else ordinary diff
4945
4946                 my ($to_mode_oct, $to_mode_str, $to_file_type);
4947                 my ($from_mode_oct, $from_mode_str, $from_file_type);
4948                 if ($diff->{'to_mode'} ne ('0' x 6)) {
4949                         $to_mode_oct = oct $diff->{'to_mode'};
4950                         if (S_ISREG($to_mode_oct)) { # only for regular file
4951                                 $to_mode_str = sprintf("%04o", $to_mode_oct & 0777); # permission bits
4952                         }
4953                         $to_file_type = file_type($diff->{'to_mode'});
4954                 }
4955                 if ($diff->{'from_mode'} ne ('0' x 6)) {
4956                         $from_mode_oct = oct $diff->{'from_mode'};
4957                         if (S_ISREG($from_mode_oct)) { # only for regular file
4958                                 $from_mode_str = sprintf("%04o", $from_mode_oct & 0777); # permission bits
4959                         }
4960                         $from_file_type = file_type($diff->{'from_mode'});
4961                 }
4962
4963                 if ($diff->{'status'} eq "A") { # created
4964                         my $mode_chng = "<span class=\"file_status new\">[new $to_file_type";
4965                         $mode_chng   .= " with mode: $to_mode_str" if $to_mode_str;
4966                         $mode_chng   .= "]</span>";
4967                         print "<td>";
4968                         print $cgi->a({-href => href(action=>"blob", hash=>$diff->{'to_id'},
4969                                                      hash_base=>$hash, file_name=>$diff->{'file'}),
4970                                       -class => "list"}, esc_path($diff->{'file'}));
4971                         print "</td>\n";
4972                         print "<td>$mode_chng</td>\n";
4973                         print "<td class=\"link\">";
4974                         if ($action eq 'commitdiff') {
4975                                 # link to patch
4976                                 $patchno++;
4977                                 print $cgi->a({-href => href(-anchor=>"patch$patchno")},
4978                                               "patch") .
4979                                       " | ";
4980                         }
4981                         print $cgi->a({-href => href(action=>"blob", hash=>$diff->{'to_id'},
4982                                                      hash_base=>$hash, file_name=>$diff->{'file'})},
4983                                       "blob");
4984                         print "</td>\n";
4985
4986                 } elsif ($diff->{'status'} eq "D") { # deleted
4987                         my $mode_chng = "<span class=\"file_status deleted\">[deleted $from_file_type]</span>";
4988                         print "<td>";
4989                         print $cgi->a({-href => href(action=>"blob", hash=>$diff->{'from_id'},
4990                                                      hash_base=>$parent, file_name=>$diff->{'file'}),
4991                                        -class => "list"}, esc_path($diff->{'file'}));
4992                         print "</td>\n";
4993                         print "<td>$mode_chng</td>\n";
4994                         print "<td class=\"link\">";
4995                         if ($action eq 'commitdiff') {
4996                                 # link to patch
4997                                 $patchno++;
4998                                 print $cgi->a({-href => href(-anchor=>"patch$patchno")},
4999                                               "patch") .
5000                                       " | ";
5001                         }
5002                         print $cgi->a({-href => href(action=>"blob", hash=>$diff->{'from_id'},
5003                                                      hash_base=>$parent, file_name=>$diff->{'file'})},
5004                                       "blob") . " | ";
5005                         if ($have_blame) {
5006                                 print $cgi->a({-href => href(action=>"blame", hash_base=>$parent,
5007                                                              file_name=>$diff->{'file'})},
5008                                               "blame") . " | ";
5009                         }
5010                         print $cgi->a({-href => href(action=>"history", hash_base=>$parent,
5011                                                      file_name=>$diff->{'file'})},
5012                                       "history");
5013                         print "</td>\n";
5014
5015                 } elsif ($diff->{'status'} eq "M" || $diff->{'status'} eq "T") { # modified, or type changed
5016                         my $mode_chnge = "";
5017                         if ($diff->{'from_mode'} != $diff->{'to_mode'}) {
5018                                 $mode_chnge = "<span class=\"file_status mode_chnge\">[changed";
5019                                 if ($from_file_type ne $to_file_type) {
5020                                         $mode_chnge .= " from $from_file_type to $to_file_type";
5021                                 }
5022                                 if (($from_mode_oct & 0777) != ($to_mode_oct & 0777)) {
5023                                         if ($from_mode_str && $to_mode_str) {
5024                                                 $mode_chnge .= " mode: $from_mode_str->$to_mode_str";
5025                                         } elsif ($to_mode_str) {
5026                                                 $mode_chnge .= " mode: $to_mode_str";
5027                                         }
5028                                 }
5029                                 $mode_chnge .= "]</span>\n";
5030                         }
5031                         print "<td>";
5032                         print $cgi->a({-href => href(action=>"blob", hash=>$diff->{'to_id'},
5033                                                      hash_base=>$hash, file_name=>$diff->{'file'}),
5034                                       -class => "list"}, esc_path($diff->{'file'}));
5035                         print "</td>\n";
5036                         print "<td>$mode_chnge</td>\n";
5037                         print "<td class=\"link\">";
5038                         if ($action eq 'commitdiff') {
5039                                 # link to patch
5040                                 $patchno++;
5041                                 print $cgi->a({-href => href(-anchor=>"patch$patchno")},
5042                                               "patch") .
5043                                       " | ";
5044                         } elsif ($diff->{'to_id'} ne $diff->{'from_id'}) {
5045                                 # "commit" view and modified file (not onlu mode changed)
5046                                 print $cgi->a({-href => href(action=>"blobdiff",
5047                                                              hash=>$diff->{'to_id'}, hash_parent=>$diff->{'from_id'},
5048                                                              hash_base=>$hash, hash_parent_base=>$parent,
5049                                                              file_name=>$diff->{'file'})},
5050                                               "diff") .
5051                                       " | ";
5052                         }
5053                         print $cgi->a({-href => href(action=>"blob", hash=>$diff->{'to_id'},
5054                                                      hash_base=>$hash, file_name=>$diff->{'file'})},
5055                                        "blob") . " | ";
5056                         if ($have_blame) {
5057                                 print $cgi->a({-href => href(action=>"blame", hash_base=>$hash,
5058                                                              file_name=>$diff->{'file'})},
5059                                               "blame") . " | ";
5060                         }
5061                         print $cgi->a({-href => href(action=>"history", hash_base=>$hash,
5062                                                      file_name=>$diff->{'file'})},
5063                                       "history");
5064                         print "</td>\n";
5065
5066                 } elsif ($diff->{'status'} eq "R" || $diff->{'status'} eq "C") { # renamed or copied
5067                         my %status_name = ('R' => 'moved', 'C' => 'copied');
5068                         my $nstatus = $status_name{$diff->{'status'}};
5069                         my $mode_chng = "";
5070                         if ($diff->{'from_mode'} != $diff->{'to_mode'}) {
5071                                 # mode also for directories, so we cannot use $to_mode_str
5072                                 $mode_chng = sprintf(", mode: %04o", $to_mode_oct & 0777);
5073                         }
5074                         print "<td>" .
5075                               $cgi->a({-href => href(action=>"blob", hash_base=>$hash,
5076                                                      hash=>$diff->{'to_id'}, file_name=>$diff->{'to_file'}),
5077                                       -class => "list"}, esc_path($diff->{'to_file'})) . "</td>\n" .
5078                               "<td><span class=\"file_status $nstatus\">[$nstatus from " .
5079                               $cgi->a({-href => href(action=>"blob", hash_base=>$parent,
5080                                                      hash=>$diff->{'from_id'}, file_name=>$diff->{'from_file'}),
5081                                       -class => "list"}, esc_path($diff->{'from_file'})) .
5082                               " with " . (int $diff->{'similarity'}) . "% similarity$mode_chng]</span></td>\n" .
5083                               "<td class=\"link\">";
5084                         if ($action eq 'commitdiff') {
5085                                 # link to patch
5086                                 $patchno++;
5087                                 print $cgi->a({-href => href(-anchor=>"patch$patchno")},
5088                                               "patch") .
5089                                       " | ";
5090                         } elsif ($diff->{'to_id'} ne $diff->{'from_id'}) {
5091                                 # "commit" view and modified file (not only pure rename or copy)
5092                                 print $cgi->a({-href => href(action=>"blobdiff",
5093                                                              hash=>$diff->{'to_id'}, hash_parent=>$diff->{'from_id'},
5094                                                              hash_base=>$hash, hash_parent_base=>$parent,
5095                                                              file_name=>$diff->{'to_file'}, file_parent=>$diff->{'from_file'})},
5096                                               "diff") .
5097                                       " | ";
5098                         }
5099                         print $cgi->a({-href => href(action=>"blob", hash=>$diff->{'to_id'},
5100                                                      hash_base=>$parent, file_name=>$diff->{'to_file'})},
5101                                       "blob") . " | ";
5102                         if ($have_blame) {
5103                                 print $cgi->a({-href => href(action=>"blame", hash_base=>$hash,
5104                                                              file_name=>$diff->{'to_file'})},
5105                                               "blame") . " | ";
5106                         }
5107                         print $cgi->a({-href => href(action=>"history", hash_base=>$hash,
5108                                                     file_name=>$diff->{'to_file'})},
5109                                       "history");
5110                         print "</td>\n";
5111
5112                 } # we should not encounter Unmerged (U) or Unknown (X) status
5113                 print "</tr>\n";
5114         }
5115         print "</tbody>" if $has_header;
5116         print "</table>\n";
5117 }
5118
5119 # Print context lines and then rem/add lines in a side-by-side manner.
5120 sub print_sidebyside_diff_lines {
5121         my ($ctx, $rem, $add) = @_;
5122
5123         # print context block before add/rem block
5124         if (@$ctx) {
5125                 print join '',
5126                         '<div class="chunk_block ctx">',
5127                                 '<div class="old">',
5128                                 @$ctx,
5129                                 '</div>',
5130                                 '<div class="new">',
5131                                 @$ctx,
5132                                 '</div>',
5133                         '</div>';
5134         }
5135
5136         if (!@$add) {
5137                 # pure removal
5138                 print join '',
5139                         '<div class="chunk_block rem">',
5140                                 '<div class="old">',
5141                                 @$rem,
5142                                 '</div>',
5143                         '</div>';
5144         } elsif (!@$rem) {
5145                 # pure addition
5146                 print join '',
5147                         '<div class="chunk_block add">',
5148                                 '<div class="new">',
5149                                 @$add,
5150                                 '</div>',
5151                         '</div>';
5152         } else {
5153                 print join '',
5154                         '<div class="chunk_block chg">',
5155                                 '<div class="old">',
5156                                 @$rem,
5157                                 '</div>',
5158                                 '<div class="new">',
5159                                 @$add,
5160                                 '</div>',
5161                         '</div>';
5162         }
5163 }
5164
5165 # Print context lines and then rem/add lines in inline manner.
5166 sub print_inline_diff_lines {
5167         my ($ctx, $rem, $add) = @_;
5168
5169         print @$ctx, @$rem, @$add;
5170 }
5171
5172 # Format removed and added line, mark changed part and HTML-format them.
5173 # Implementation is based on contrib/diff-highlight
5174 sub format_rem_add_lines_pair {
5175         my ($rem, $add, $num_parents) = @_;
5176
5177         # We need to untabify lines before split()'ing them;
5178         # otherwise offsets would be invalid.
5179         chomp $rem;
5180         chomp $add;
5181         $rem = untabify($rem);
5182         $add = untabify($add);
5183
5184         my @rem = split(//, $rem);
5185         my @add = split(//, $add);
5186         my ($esc_rem, $esc_add);
5187         # Ignore leading +/- characters for each parent.
5188         my ($prefix_len, $suffix_len) = ($num_parents, 0);
5189         my ($prefix_has_nonspace, $suffix_has_nonspace);
5190
5191         my $shorter = (@rem < @add) ? @rem : @add;
5192         while ($prefix_len < $shorter) {
5193                 last if ($rem[$prefix_len] ne $add[$prefix_len]);
5194
5195                 $prefix_has_nonspace = 1 if ($rem[$prefix_len] !~ /\s/);
5196                 $prefix_len++;
5197         }
5198
5199         while ($prefix_len + $suffix_len < $shorter) {
5200                 last if ($rem[-1 - $suffix_len] ne $add[-1 - $suffix_len]);
5201
5202                 $suffix_has_nonspace = 1 if ($rem[-1 - $suffix_len] !~ /\s/);
5203                 $suffix_len++;
5204         }
5205
5206         # Mark lines that are different from each other, but have some common
5207         # part that isn't whitespace.  If lines are completely different, don't
5208         # mark them because that would make output unreadable, especially if
5209         # diff consists of multiple lines.
5210         if ($prefix_has_nonspace || $suffix_has_nonspace) {
5211                 $esc_rem = esc_html_hl_regions($rem, 'marked',
5212                         [$prefix_len, @rem - $suffix_len], -nbsp=>1);
5213                 $esc_add = esc_html_hl_regions($add, 'marked',
5214                         [$prefix_len, @add - $suffix_len], -nbsp=>1);
5215         } else {
5216                 $esc_rem = esc_html($rem, -nbsp=>1);
5217                 $esc_add = esc_html($add, -nbsp=>1);
5218         }
5219
5220         return format_diff_line(\$esc_rem, 'rem'),
5221                format_diff_line(\$esc_add, 'add');
5222 }
5223
5224 # HTML-format diff context, removed and added lines.
5225 sub format_ctx_rem_add_lines {
5226         my ($ctx, $rem, $add, $num_parents) = @_;
5227         my (@new_ctx, @new_rem, @new_add);
5228         my $can_highlight = 0;
5229         my $is_combined = ($num_parents > 1);
5230
5231         # Highlight if every removed line has a corresponding added line.
5232         if (@$add > 0 && @$add == @$rem) {
5233                 $can_highlight = 1;
5234
5235                 # Highlight lines in combined diff only if the chunk contains
5236                 # diff between the same version, e.g.
5237                 #
5238                 #    - a
5239                 #   -  b
5240                 #    + c
5241                 #   +  d
5242                 #
5243                 # Otherwise the highlightling would be confusing.
5244                 if ($is_combined) {
5245                         for (my $i = 0; $i < @$add; $i++) {
5246                                 my $prefix_rem = substr($rem->[$i], 0, $num_parents);
5247                                 my $prefix_add = substr($add->[$i], 0, $num_parents);
5248
5249                                 $prefix_rem =~ s/-/+/g;
5250
5251                                 if ($prefix_rem ne $prefix_add) {
5252                                         $can_highlight = 0;
5253                                         last;
5254                                 }
5255                         }
5256                 }
5257         }
5258
5259         if ($can_highlight) {
5260                 for (my $i = 0; $i < @$add; $i++) {
5261                         my ($line_rem, $line_add) = format_rem_add_lines_pair(
5262                                 $rem->[$i], $add->[$i], $num_parents);
5263                         push @new_rem, $line_rem;
5264                         push @new_add, $line_add;
5265                 }
5266         } else {
5267                 @new_rem = map { format_diff_line($_, 'rem') } @$rem;
5268                 @new_add = map { format_diff_line($_, 'add') } @$add;
5269         }
5270
5271         @new_ctx = map { format_diff_line($_, 'ctx') } @$ctx;
5272
5273         return (\@new_ctx, \@new_rem, \@new_add);
5274 }
5275
5276 # Print context lines and then rem/add lines.
5277 sub print_diff_lines {
5278         my ($ctx, $rem, $add, $diff_style, $num_parents) = @_;
5279         my $is_combined = $num_parents > 1;
5280
5281         ($ctx, $rem, $add) = format_ctx_rem_add_lines($ctx, $rem, $add,
5282                 $num_parents);
5283
5284         if ($diff_style eq 'sidebyside' && !$is_combined) {
5285                 print_sidebyside_diff_lines($ctx, $rem, $add);
5286         } else {
5287                 # default 'inline' style and unknown styles
5288                 print_inline_diff_lines($ctx, $rem, $add);
5289         }
5290 }
5291
5292 sub print_diff_chunk {
5293         my ($diff_style, $num_parents, $from, $to, @chunk) = @_;
5294         my (@ctx, @rem, @add);
5295
5296         # The class of the previous line.
5297         my $prev_class = '';
5298
5299         return unless @chunk;
5300
5301         # incomplete last line might be among removed or added lines,
5302         # or both, or among context lines: find which
5303         for (my $i = 1; $i < @chunk; $i++) {
5304                 if ($chunk[$i][0] eq 'incomplete') {
5305                         $chunk[$i][0] = $chunk[$i-1][0];
5306                 }
5307         }
5308
5309         # guardian
5310         push @chunk, ["", ""];
5311
5312         foreach my $line_info (@chunk) {
5313                 my ($class, $line) = @$line_info;
5314
5315                 # print chunk headers
5316                 if ($class && $class eq 'chunk_header') {
5317                         print format_diff_line($line, $class, $from, $to);
5318                         next;
5319                 }
5320
5321                 ## print from accumulator when have some add/rem lines or end
5322                 # of chunk (flush context lines), or when have add and rem
5323                 # lines and new block is reached (otherwise add/rem lines could
5324                 # be reordered)
5325                 if (!$class || ((@rem || @add) && $class eq 'ctx') ||
5326                     (@rem && @add && $class ne $prev_class)) {
5327                         print_diff_lines(\@ctx, \@rem, \@add,
5328                                          $diff_style, $num_parents);
5329                         @ctx = @rem = @add = ();
5330                 }
5331
5332                 ## adding lines to accumulator
5333                 # guardian value
5334                 last unless $line;
5335                 # rem, add or change
5336                 if ($class eq 'rem') {
5337                         push @rem, $line;
5338                 } elsif ($class eq 'add') {
5339                         push @add, $line;
5340                 }
5341                 # context line
5342                 if ($class eq 'ctx') {
5343                         push @ctx, $line;
5344                 }
5345
5346                 $prev_class = $class;
5347         }
5348 }
5349
5350 sub git_patchset_body {
5351         my ($fd, $diff_style, $difftree, $hash, @hash_parents) = @_;
5352         my ($hash_parent) = $hash_parents[0];
5353
5354         my $is_combined = (@hash_parents > 1);
5355         my $patch_idx = 0;
5356         my $patch_number = 0;
5357         my $patch_line;
5358         my $diffinfo;
5359         my $to_name;
5360         my (%from, %to);
5361         my @chunk; # for side-by-side diff
5362
5363         print "<div class=\"patchset\">\n";
5364
5365         # skip to first patch
5366         while ($patch_line = <$fd>) {
5367                 chomp $patch_line;
5368
5369                 last if ($patch_line =~ m/^diff /);
5370         }
5371
5372  PATCH:
5373         while ($patch_line) {
5374
5375                 # parse "git diff" header line
5376                 if ($patch_line =~ m/^diff --git (\"(?:[^\\\"]*(?:\\.[^\\\"]*)*)\"|[^ "]*) (.*)$/) {
5377                         # $1 is from_name, which we do not use
5378                         $to_name = unquote($2);
5379                         $to_name =~ s!^b/!!;
5380                 } elsif ($patch_line =~ m/^diff --(cc|combined) ("?.*"?)$/) {
5381                         # $1 is 'cc' or 'combined', which we do not use
5382                         $to_name = unquote($2);
5383                 } else {
5384                         $to_name = undef;
5385                 }
5386
5387                 # check if current patch belong to current raw line
5388                 # and parse raw git-diff line if needed
5389                 if (is_patch_split($diffinfo, { 'to_file' => $to_name })) {
5390                         # this is continuation of a split patch
5391                         print "<div class=\"patch cont\">\n";
5392                 } else {
5393                         # advance raw git-diff output if needed
5394                         $patch_idx++ if defined $diffinfo;
5395
5396                         # read and prepare patch information
5397                         $diffinfo = parsed_difftree_line($difftree->[$patch_idx]);
5398
5399                         # compact combined diff output can have some patches skipped
5400                         # find which patch (using pathname of result) we are at now;
5401                         if ($is_combined) {
5402                                 while ($to_name ne $diffinfo->{'to_file'}) {
5403                                         print "<div class=\"patch\" id=\"patch". ($patch_idx+1) ."\">\n" .
5404                                               format_diff_cc_simplified($diffinfo, @hash_parents) .
5405                                               "</div>\n";  # class="patch"
5406
5407                                         $patch_idx++;
5408                                         $patch_number++;
5409
5410                                         last if $patch_idx > $#$difftree;
5411                                         $diffinfo = parsed_difftree_line($difftree->[$patch_idx]);
5412                                 }
5413                         }
5414
5415                         # modifies %from, %to hashes
5416                         parse_from_to_diffinfo($diffinfo, \%from, \%to, @hash_parents);
5417
5418                         # this is first patch for raw difftree line with $patch_idx index
5419                         # we index @$difftree array from 0, but number patches from 1
5420                         print "<div class=\"patch\" id=\"patch". ($patch_idx+1) ."\">\n";
5421                 }
5422
5423                 # git diff header
5424                 #assert($patch_line =~ m/^diff /) if DEBUG;
5425                 #assert($patch_line !~ m!$/$!) if DEBUG; # is chomp-ed
5426                 $patch_number++;
5427                 # print "git diff" header
5428                 print format_git_diff_header_line($patch_line, $diffinfo,
5429                                                   \%from, \%to);
5430
5431                 # print extended diff header
5432                 print "<div class=\"diff extended_header\">\n";
5433         EXTENDED_HEADER:
5434                 while ($patch_line = <$fd>) {
5435                         chomp $patch_line;
5436
5437                         last EXTENDED_HEADER if ($patch_line =~ m/^--- |^diff /);
5438
5439                         print format_extended_diff_header_line($patch_line, $diffinfo,
5440                                                                \%from, \%to);
5441                 }
5442                 print "</div>\n"; # class="diff extended_header"
5443
5444                 # from-file/to-file diff header
5445                 if (! $patch_line) {
5446                         print "</div>\n"; # class="patch"
5447                         last PATCH;
5448                 }
5449                 next PATCH if ($patch_line =~ m/^diff /);
5450                 #assert($patch_line =~ m/^---/) if DEBUG;
5451
5452                 my $last_patch_line = $patch_line;
5453                 $patch_line = <$fd>;
5454                 chomp $patch_line;
5455                 #assert($patch_line =~ m/^\+\+\+/) if DEBUG;
5456
5457                 print format_diff_from_to_header($last_patch_line, $patch_line,
5458                                                  $diffinfo, \%from, \%to,
5459                                                  @hash_parents);
5460
5461                 # the patch itself
5462         LINE:
5463                 while ($patch_line = <$fd>) {
5464                         chomp $patch_line;
5465
5466                         next PATCH if ($patch_line =~ m/^diff /);
5467
5468                         my $class = diff_line_class($patch_line, \%from, \%to);
5469
5470                         if ($class eq 'chunk_header') {
5471                                 print_diff_chunk($diff_style, scalar @hash_parents, \%from, \%to, @chunk);
5472                                 @chunk = ();
5473                         }
5474
5475                         push @chunk, [ $class, $patch_line ];
5476                 }
5477
5478         } continue {
5479                 if (@chunk) {
5480                         print_diff_chunk($diff_style, scalar @hash_parents, \%from, \%to, @chunk);
5481                         @chunk = ();
5482                 }
5483                 print "</div>\n"; # class="patch"
5484         }
5485
5486         # for compact combined (--cc) format, with chunk and patch simplification
5487         # the patchset might be empty, but there might be unprocessed raw lines
5488         for (++$patch_idx if $patch_number > 0;
5489              $patch_idx < @$difftree;
5490              ++$patch_idx) {
5491                 # read and prepare patch information
5492                 $diffinfo = parsed_difftree_line($difftree->[$patch_idx]);
5493
5494                 # generate anchor for "patch" links in difftree / whatchanged part
5495                 print "<div class=\"patch\" id=\"patch". ($patch_idx+1) ."\">\n" .
5496                       format_diff_cc_simplified($diffinfo, @hash_parents) .
5497                       "</div>\n";  # class="patch"
5498
5499                 $patch_number++;
5500         }
5501
5502         if ($patch_number == 0) {
5503                 if (@hash_parents > 1) {
5504                         print "<div class=\"diff nodifferences\">Trivial merge</div>\n";
5505                 } else {
5506                         print "<div class=\"diff nodifferences\">No differences found</div>\n";
5507                 }
5508         }
5509
5510         print "</div>\n"; # class="patchset"
5511 }
5512
5513 # . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
5514
5515 sub git_project_search_form {
5516         my ($searchtext, $search_use_regexp) = @_;
5517
5518         my $limit = '';
5519         if ($project_filter) {
5520                 $limit = " in '$project_filter/'";
5521         }
5522
5523         print "<div class=\"projsearch\">\n";
5524         print $cgi->start_form(-method => 'get', -action => $my_uri) .
5525               $cgi->hidden(-name => 'a', -value => 'project_list')  . "\n";
5526         print $cgi->hidden(-name => 'pf', -value => $project_filter). "\n"
5527                 if (defined $project_filter);
5528         print $cgi->textfield(-name => 's', -value => $searchtext,
5529                               -title => "Search project by name and description$limit",
5530                               -size => 60) . "\n" .
5531               "<span title=\"Extended regular expression\">" .
5532               $cgi->checkbox(-name => 'sr', -value => 1, -label => 're',
5533                              -checked => $search_use_regexp) .
5534               "</span>\n" .
5535               $cgi->submit(-name => 'btnS', -value => 'Search') .
5536               $cgi->end_form() . "\n" .
5537               $cgi->a({-href => href(project => undef, searchtext => undef,
5538                                      project_filter => $project_filter)},
5539                       esc_html("List all projects$limit")) . "<br />\n";
5540         print "</div>\n";
5541 }
5542
5543 # entry for given @keys needs filling if at least one of keys in list
5544 # is not present in %$project_info
5545 sub project_info_needs_filling {
5546         my ($project_info, @keys) = @_;
5547
5548         # return List::MoreUtils::any { !exists $project_info->{$_} } @keys;
5549         foreach my $key (@keys) {
5550                 if (!exists $project_info->{$key}) {
5551                         return 1;
5552                 }
5553         }
5554         return;
5555 }
5556
5557 # fills project list info (age, description, owner, category, forks, etc.)
5558 # for each project in the list, removing invalid projects from
5559 # returned list, or fill only specified info.
5560 #
5561 # Invalid projects are removed from the returned list if and only if you
5562 # ask 'age' or 'age_string' to be filled, because they are the only fields
5563 # that run unconditionally git command that requires repository, and
5564 # therefore do always check if project repository is invalid.
5565 #
5566 # USAGE:
5567 # * fill_project_list_info(\@project_list, 'descr_long', 'ctags')
5568 #   ensures that 'descr_long' and 'ctags' fields are filled
5569 # * @project_list = fill_project_list_info(\@project_list)
5570 #   ensures that all fields are filled (and invalid projects removed)
5571 #
5572 # NOTE: modifies $projlist, but does not remove entries from it
5573 sub fill_project_list_info {
5574         my ($projlist, @wanted_keys) = @_;
5575         my @projects;
5576         my $filter_set = sub { return @_; };
5577         if (@wanted_keys) {
5578                 my %wanted_keys = map { $_ => 1 } @wanted_keys;
5579                 $filter_set = sub { return grep { $wanted_keys{$_} } @_; };
5580         }
5581
5582         my $show_ctags = gitweb_check_feature('ctags');
5583  PROJECT:
5584         foreach my $pr (@$projlist) {
5585                 if (project_info_needs_filling($pr, $filter_set->('age', 'age_string'))) {
5586                         my (@activity) = git_get_last_activity($pr->{'path'});
5587                         unless (@activity) {
5588                                 next PROJECT;
5589                         }
5590                         ($pr->{'age'}, $pr->{'age_string'}) = @activity;
5591                 }
5592                 if (project_info_needs_filling($pr, $filter_set->('descr', 'descr_long'))) {
5593                         my $descr = git_get_project_description($pr->{'path'}) || "";
5594                         $descr = to_utf8($descr);
5595                         $pr->{'descr_long'} = $descr;
5596                         $pr->{'descr'} = chop_str($descr, $projects_list_description_width, 5);
5597                 }
5598                 if (project_info_needs_filling($pr, $filter_set->('owner'))) {
5599                         $pr->{'owner'} = git_get_project_owner("$pr->{'path'}") || "";
5600                 }
5601                 if ($show_ctags &&
5602                     project_info_needs_filling($pr, $filter_set->('ctags'))) {
5603                         $pr->{'ctags'} = git_get_project_ctags($pr->{'path'});
5604                 }
5605                 if ($projects_list_group_categories &&
5606                     project_info_needs_filling($pr, $filter_set->('category'))) {
5607                         my $cat = git_get_project_category($pr->{'path'}) ||
5608                                                            $project_list_default_category;
5609                         $pr->{'category'} = to_utf8($cat);
5610                 }
5611
5612                 push @projects, $pr;
5613         }
5614
5615         return @projects;
5616 }
5617
5618 sub sort_projects_list {
5619         my ($projlist, $order) = @_;
5620
5621         sub order_str {
5622                 my $key = shift;
5623                 return sub { $a->{$key} cmp $b->{$key} };
5624         }
5625
5626         sub order_num_then_undef {
5627                 my $key = shift;
5628                 return sub {
5629                         defined $a->{$key} ?
5630                                 (defined $b->{$key} ? $a->{$key} <=> $b->{$key} : -1) :
5631                                 (defined $b->{$key} ? 1 : 0)
5632                 };
5633         }
5634
5635         my %orderings = (
5636                 project => order_str('path'),
5637                 descr => order_str('descr_long'),
5638                 owner => order_str('owner'),
5639                 age => order_num_then_undef('age'),
5640         );
5641
5642         my $ordering = $orderings{$order};
5643         return defined $ordering ? sort $ordering @$projlist : @$projlist;
5644 }
5645
5646 # returns a hash of categories, containing the list of project
5647 # belonging to each category
5648 sub build_projlist_by_category {
5649         my ($projlist, $from, $to) = @_;
5650         my %categories;
5651
5652         $from = 0 unless defined $from;
5653         $to = $#$projlist if (!defined $to || $#$projlist < $to);
5654
5655         for (my $i = $from; $i <= $to; $i++) {
5656                 my $pr = $projlist->[$i];
5657                 push @{$categories{ $pr->{'category'} }}, $pr;
5658         }
5659
5660         return wantarray ? %categories : \%categories;
5661 }
5662
5663 # print 'sort by' <th> element, generating 'sort by $name' replay link
5664 # if that order is not selected
5665 sub print_sort_th {
5666         print format_sort_th(@_);
5667 }
5668
5669 sub format_sort_th {
5670         my ($name, $order, $header) = @_;
5671         my $sort_th = "";
5672         $header ||= ucfirst($name);
5673
5674         if ($order eq $name) {
5675                 $sort_th .= "<th>$header</th>\n";
5676         } else {
5677                 $sort_th .= "<th>" .
5678                             $cgi->a({-href => href(-replay=>1, order=>$name),
5679                                      -class => "header"}, $header) .
5680                             "</th>\n";
5681         }
5682
5683         return $sort_th;
5684 }
5685
5686 sub git_project_list_rows {
5687         my ($projlist, $from, $to, $check_forks) = @_;
5688
5689         $from = 0 unless defined $from;
5690         $to = $#$projlist if (!defined $to || $#$projlist < $to);
5691
5692         my $alternate = 1;
5693         for (my $i = $from; $i <= $to; $i++) {
5694                 my $pr = $projlist->[$i];
5695
5696                 if ($alternate) {
5697                         print "<tr class=\"dark\">\n";
5698                 } else {
5699                         print "<tr class=\"light\">\n";
5700                 }
5701                 $alternate ^= 1;
5702
5703                 if ($check_forks) {
5704                         print "<td>";
5705                         if ($pr->{'forks'}) {
5706                                 my $nforks = scalar @{$pr->{'forks'}};
5707                                 if ($nforks > 0) {
5708                                         print $cgi->a({-href => href(project=>$pr->{'path'}, action=>"forks"),
5709                                                        -title => "$nforks forks"}, "+");
5710                                 } else {
5711                                         print $cgi->span({-title => "$nforks forks"}, "+");
5712                                 }
5713                         }
5714                         print "</td>\n";
5715                 }
5716                 print "<td>" . $cgi->a({-href => href(project=>$pr->{'path'}, action=>"summary"),
5717                                         -class => "list"},
5718                                        esc_html_match_hl($pr->{'path'}, $search_regexp)) .
5719                       "</td>\n" .
5720                       "<td>" . $cgi->a({-href => href(project=>$pr->{'path'}, action=>"summary"),
5721                                         -class => "list",
5722                                         -title => $pr->{'descr_long'}},
5723                                         $search_regexp
5724                                         ? esc_html_match_hl_chopped($pr->{'descr_long'},
5725                                                                     $pr->{'descr'}, $search_regexp)
5726                                         : esc_html($pr->{'descr'})) .
5727                       "</td>\n";
5728                 unless ($omit_owner) {
5729                         print "<td><i>" . chop_and_escape_str($pr->{'owner'}, 15) . "</i></td>\n";
5730                 }
5731                 unless ($omit_age_column) {
5732                         print "<td class=\"". age_class($pr->{'age'}) . "\">" .
5733                             (defined $pr->{'age_string'} ? $pr->{'age_string'} : "No commits") . "</td>\n";
5734                 }
5735                 print"<td class=\"link\">" .
5736                       $cgi->a({-href => href(project=>$pr->{'path'}, action=>"summary")}, "summary")   . " | " .
5737                       $cgi->a({-href => href(project=>$pr->{'path'}, action=>"shortlog")}, "shortlog") . " | " .
5738                       $cgi->a({-href => href(project=>$pr->{'path'}, action=>"log")}, "log") . " | " .
5739                       $cgi->a({-href => href(project=>$pr->{'path'}, action=>"tree")}, "tree") .
5740                       ($pr->{'forks'} ? " | " . $cgi->a({-href => href(project=>$pr->{'path'}, action=>"forks")}, "forks") : '') .
5741                       "</td>\n" .
5742                       "</tr>\n";
5743         }
5744 }
5745
5746 sub git_project_list_body {
5747         # actually uses global variable $project
5748         my ($projlist, $order, $from, $to, $extra, $no_header) = @_;
5749         my @projects = @$projlist;
5750
5751         my $check_forks = gitweb_check_feature('forks');
5752         my $show_ctags  = gitweb_check_feature('ctags');
5753         my $tagfilter = $show_ctags ? $input_params{'ctag'} : undef;
5754         $check_forks = undef
5755                 if ($tagfilter || $search_regexp);
5756
5757         # filtering out forks before filling info allows to do less work
5758         @projects = filter_forks_from_projects_list(\@projects)
5759                 if ($check_forks);
5760         # search_projects_list pre-fills required info
5761         @projects = search_projects_list(\@projects,
5762                                          'search_regexp' => $search_regexp,
5763                                          'tagfilter'  => $tagfilter)
5764                 if ($tagfilter || $search_regexp);
5765         # fill the rest
5766         my @all_fields = ('descr', 'descr_long', 'ctags', 'category');
5767         push @all_fields, ('age', 'age_string') unless($omit_age_column);
5768         push @all_fields, 'owner' unless($omit_owner);
5769         @projects = fill_project_list_info(\@projects, @all_fields);
5770
5771         $order ||= $default_projects_order;
5772         $from = 0 unless defined $from;
5773         $to = $#projects if (!defined $to || $#projects < $to);
5774
5775         # short circuit
5776         if ($from > $to) {
5777                 print "<center>\n".
5778                       "<b>No such projects found</b><br />\n".
5779                       "Click ".$cgi->a({-href=>href(project=>undef)},"here")." to view all projects<br />\n".
5780                       "</center>\n<br />\n";
5781                 return;
5782         }
5783
5784         @projects = sort_projects_list(\@projects, $order);
5785
5786         if ($show_ctags) {
5787                 my $ctags = git_gather_all_ctags(\@projects);
5788                 my $cloud = git_populate_project_tagcloud($ctags);
5789                 print git_show_project_tagcloud($cloud, 64);
5790         }
5791
5792         print "<table class=\"project_list\">\n";
5793         unless ($no_header) {
5794                 print "<tr>\n";
5795                 if ($check_forks) {
5796                         print "<th></th>\n";
5797                 }
5798                 print_sort_th('project', $order, 'Project');
5799                 print_sort_th('descr', $order, 'Description');
5800                 print_sort_th('owner', $order, 'Owner') unless $omit_owner;
5801                 print_sort_th('age', $order, 'Last Change') unless $omit_age_column;
5802                 print "<th></th>\n" . # for links
5803                       "</tr>\n";
5804         }
5805
5806         if ($projects_list_group_categories) {
5807                 # only display categories with projects in the $from-$to window
5808                 @projects = sort {$a->{'category'} cmp $b->{'category'}} @projects[$from..$to];
5809                 my %categories = build_projlist_by_category(\@projects, $from, $to);
5810                 foreach my $cat (sort keys %categories) {
5811                         unless ($cat eq "") {
5812                                 print "<tr>\n";
5813                                 if ($check_forks) {
5814                                         print "<td></td>\n";
5815                                 }
5816                                 print "<td class=\"category\" colspan=\"5\">".esc_html($cat)."</td>\n";
5817                                 print "</tr>\n";
5818                         }
5819
5820                         git_project_list_rows($categories{$cat}, undef, undef, $check_forks);
5821                 }
5822         } else {
5823                 git_project_list_rows(\@projects, $from, $to, $check_forks);
5824         }
5825
5826         if (defined $extra) {
5827                 print "<tr>\n";
5828                 if ($check_forks) {
5829                         print "<td></td>\n";
5830                 }
5831                 print "<td colspan=\"5\">$extra</td>\n" .
5832                       "</tr>\n";
5833         }
5834         print "</table>\n";
5835 }
5836
5837 sub git_log_body {
5838         # uses global variable $project
5839         my ($commitlist, $from, $to, $refs, $extra) = @_;
5840
5841         $from = 0 unless defined $from;
5842         $to = $#{$commitlist} if (!defined $to || $#{$commitlist} < $to);
5843
5844         for (my $i = 0; $i <= $to; $i++) {
5845                 my %co = %{$commitlist->[$i]};
5846                 next if !%co;
5847                 my $commit = $co{'id'};
5848                 my $ref = format_ref_marker($refs, $commit);
5849                 git_print_header_div('commit',
5850                                "<span class=\"age\">$co{'age_string'}</span>" .
5851                                esc_html($co{'title'}) . $ref,
5852                                $commit);
5853                 print "<div class=\"title_text\">\n" .
5854                       "<div class=\"log_link\">\n" .
5855                       $cgi->a({-href => href(action=>"commit", hash=>$commit)}, "commit") .
5856                       " | " .
5857                       $cgi->a({-href => href(action=>"commitdiff", hash=>$commit)}, "commitdiff") .
5858                       " | " .
5859                       $cgi->a({-href => href(action=>"tree", hash=>$commit, hash_base=>$commit)}, "tree") .
5860                       "<br/>\n" .
5861                       "</div>\n";
5862                       git_print_authorship(\%co, -tag => 'span');
5863                       print "<br/>\n</div>\n";
5864
5865                 print "<div class=\"log_body\">\n";
5866                 git_print_log($co{'comment'}, -final_empty_line=> 1);
5867                 print "</div>\n";
5868         }
5869         if ($extra) {
5870                 print "<div class=\"page_nav\">\n";
5871                 print "$extra\n";
5872                 print "</div>\n";
5873         }
5874 }
5875
5876 sub git_shortlog_body {
5877         # uses global variable $project
5878         my ($commitlist, $from, $to, $refs, $extra) = @_;
5879
5880         $from = 0 unless defined $from;
5881         $to = $#{$commitlist} if (!defined $to || $#{$commitlist} < $to);
5882
5883         print "<table class=\"shortlog\">\n";
5884         my $alternate = 1;
5885         for (my $i = $from; $i <= $to; $i++) {
5886                 my %co = %{$commitlist->[$i]};
5887                 my $commit = $co{'id'};
5888                 my $ref = format_ref_marker($refs, $commit);
5889                 if ($alternate) {
5890                         print "<tr class=\"dark\">\n";
5891                 } else {
5892                         print "<tr class=\"light\">\n";
5893                 }
5894                 $alternate ^= 1;
5895                 # git_summary() used print "<td><i>$co{'age_string'}</i></td>\n" .
5896                 print "<td title=\"$co{'age_string_age'}\"><i>$co{'age_string_date'}</i></td>\n" .
5897                       format_author_html('td', \%co, 10) . "<td>";
5898                 print format_subject_html($co{'title'}, $co{'title_short'},
5899                                           href(action=>"commit", hash=>$commit), $ref);
5900                 print "</td>\n" .
5901                       "<td class=\"link\">" .
5902                       $cgi->a({-href => href(action=>"commit", hash=>$commit)}, "commit") . " | " .
5903                       $cgi->a({-href => href(action=>"commitdiff", hash=>$commit)}, "commitdiff") . " | " .
5904                       $cgi->a({-href => href(action=>"tree", hash=>$commit, hash_base=>$commit)}, "tree");
5905                 my $snapshot_links = format_snapshot_links($commit);
5906                 if (defined $snapshot_links) {
5907                         print " | " . $snapshot_links;
5908                 }
5909                 print "</td>\n" .
5910                       "</tr>\n";
5911         }
5912         if (defined $extra) {
5913                 print "<tr>\n" .
5914                       "<td colspan=\"4\">$extra</td>\n" .
5915                       "</tr>\n";
5916         }
5917         print "</table>\n";
5918 }
5919
5920 sub git_history_body {
5921         # Warning: assumes constant type (blob or tree) during history
5922         my ($commitlist, $from, $to, $refs, $extra,
5923             $file_name, $file_hash, $ftype) = @_;
5924
5925         $from = 0 unless defined $from;
5926         $to = $#{$commitlist} unless (defined $to && $to <= $#{$commitlist});
5927
5928         print "<table class=\"history\">\n";
5929         my $alternate = 1;
5930         for (my $i = $from; $i <= $to; $i++) {
5931                 my %co = %{$commitlist->[$i]};
5932                 if (!%co) {
5933                         next;
5934                 }
5935                 my $commit = $co{'id'};
5936
5937                 my $ref = format_ref_marker($refs, $commit);
5938
5939                 if ($alternate) {
5940                         print "<tr class=\"dark\">\n";
5941                 } else {
5942                         print "<tr class=\"light\">\n";
5943                 }
5944                 $alternate ^= 1;
5945                 print "<td title=\"$co{'age_string_age'}\"><i>$co{'age_string_date'}</i></td>\n" .
5946         # shortlog:   format_author_html('td', \%co, 10)
5947                       format_author_html('td', \%co, 15, 3) . "<td>";
5948                 # originally git_history used chop_str($co{'title'}, 50)
5949                 print format_subject_html($co{'title'}, $co{'title_short'},
5950                                           href(action=>"commit", hash=>$commit), $ref);
5951                 print "</td>\n" .
5952                       "<td class=\"link\">" .
5953                       $cgi->a({-href => href(action=>$ftype, hash_base=>$commit, file_name=>$file_name)}, $ftype) . " | " .
5954                       $cgi->a({-href => href(action=>"commitdiff", hash=>$commit)}, "commitdiff");
5955
5956                 if ($ftype eq 'blob') {
5957                         my $blob_current = $file_hash;
5958                         my $blob_parent  = git_get_hash_by_path($commit, $file_name);
5959                         if (defined $blob_current && defined $blob_parent &&
5960                                         $blob_current ne $blob_parent) {
5961                                 print " | " .
5962                                         $cgi->a({-href => href(action=>"blobdiff",
5963                                                                hash=>$blob_current, hash_parent=>$blob_parent,
5964                                                                hash_base=>$hash_base, hash_parent_base=>$commit,
5965                                                                file_name=>$file_name)},
5966                                                 "diff to current");
5967                         }
5968                 }
5969                 print "</td>\n" .
5970                       "</tr>\n";
5971         }
5972         if (defined $extra) {
5973                 print "<tr>\n" .
5974                       "<td colspan=\"4\">$extra</td>\n" .
5975                       "</tr>\n";
5976         }
5977         print "</table>\n";
5978 }
5979
5980 sub git_tags_body {
5981         # uses global variable $project
5982         my ($taglist, $from, $to, $extra) = @_;
5983         $from = 0 unless defined $from;
5984         $to = $#{$taglist} if (!defined $to || $#{$taglist} < $to);
5985
5986         print "<table class=\"tags\">\n";
5987         my $alternate = 1;
5988         for (my $i = $from; $i <= $to; $i++) {
5989                 my $entry = $taglist->[$i];
5990                 my %tag = %$entry;
5991                 my $comment = $tag{'subject'};
5992                 my $comment_short;
5993                 if (defined $comment) {
5994                         $comment_short = chop_str($comment, 30, 5);
5995                 }
5996                 if ($alternate) {
5997                         print "<tr class=\"dark\">\n";
5998                 } else {
5999                         print "<tr class=\"light\">\n";
6000                 }
6001                 $alternate ^= 1;
6002                 if (defined $tag{'age'}) {
6003                         print "<td><i>$tag{'age'}</i></td>\n";
6004                 } else {
6005                         print "<td></td>\n";
6006                 }
6007                 print "<td>" .
6008                       $cgi->a({-href => href(action=>$tag{'reftype'}, hash=>$tag{'refid'}),
6009                                -class => "list name"}, esc_html($tag{'name'})) .
6010                       "</td>\n" .
6011                       "<td>";
6012                 if (defined $comment) {
6013                         print format_subject_html($comment, $comment_short,
6014                                                   href(action=>"tag", hash=>$tag{'id'}));
6015                 }
6016                 print "</td>\n" .
6017                       "<td class=\"selflink\">";
6018                 if ($tag{'type'} eq "tag") {
6019                         print $cgi->a({-href => href(action=>"tag", hash=>$tag{'id'})}, "tag");
6020                 } else {
6021                         print "&nbsp;";
6022                 }
6023                 print "</td>\n" .
6024                       "<td class=\"link\">" . " | " .
6025                       $cgi->a({-href => href(action=>$tag{'reftype'}, hash=>$tag{'refid'})}, $tag{'reftype'});
6026                 if ($tag{'reftype'} eq "commit") {
6027                         print " | " . $cgi->a({-href => href(action=>"shortlog", hash=>$tag{'fullname'})}, "shortlog") .
6028                               " | " . $cgi->a({-href => href(action=>"log", hash=>$tag{'fullname'})}, "log");
6029                 } elsif ($tag{'reftype'} eq "blob") {
6030                         print " | " . $cgi->a({-href => href(action=>"blob_plain", hash=>$tag{'refid'})}, "raw");
6031                 }
6032                 print "</td>\n" .
6033                       "</tr>";
6034         }
6035         if (defined $extra) {
6036                 print "<tr>\n" .
6037                       "<td colspan=\"5\">$extra</td>\n" .
6038                       "</tr>\n";
6039         }
6040         print "</table>\n";
6041 }
6042
6043 sub git_heads_body {
6044         # uses global variable $project
6045         my ($headlist, $head_at, $from, $to, $extra) = @_;
6046         $from = 0 unless defined $from;
6047         $to = $#{$headlist} if (!defined $to || $#{$headlist} < $to);
6048
6049         print "<table class=\"heads\">\n";
6050         my $alternate = 1;
6051         for (my $i = $from; $i <= $to; $i++) {
6052                 my $entry = $headlist->[$i];
6053                 my %ref = %$entry;
6054                 my $curr = defined $head_at && $ref{'id'} eq $head_at;
6055                 if ($alternate) {
6056                         print "<tr class=\"dark\">\n";
6057                 } else {
6058                         print "<tr class=\"light\">\n";
6059                 }
6060                 $alternate ^= 1;
6061                 print "<td><i>$ref{'age'}</i></td>\n" .
6062                       ($curr ? "<td class=\"current_head\">" : "<td>") .
6063                       $cgi->a({-href => href(action=>"shortlog", hash=>$ref{'fullname'}),
6064                                -class => "list name"},esc_html($ref{'name'})) .
6065                       "</td>\n" .
6066                       "<td class=\"link\">" .
6067                       $cgi->a({-href => href(action=>"shortlog", hash=>$ref{'fullname'})}, "shortlog") . " | " .
6068                       $cgi->a({-href => href(action=>"log", hash=>$ref{'fullname'})}, "log") . " | " .
6069                       $cgi->a({-href => href(action=>"tree", hash=>$ref{'fullname'}, hash_base=>$ref{'fullname'})}, "tree") .
6070                       "</td>\n" .
6071                       "</tr>";
6072         }
6073         if (defined $extra) {
6074                 print "<tr>\n" .
6075                       "<td colspan=\"3\">$extra</td>\n" .
6076                       "</tr>\n";
6077         }
6078         print "</table>\n";
6079 }
6080
6081 # Display a single remote block
6082 sub git_remote_block {
6083         my ($remote, $rdata, $limit, $head) = @_;
6084
6085         my $heads = $rdata->{'heads'};
6086         my $fetch = $rdata->{'fetch'};
6087         my $push = $rdata->{'push'};
6088
6089         my $urls_table = "<table class=\"projects_list\">\n" ;
6090
6091         if (defined $fetch) {
6092                 if ($fetch eq $push) {
6093                         $urls_table .= format_repo_url("URL", $fetch);
6094                 } else {
6095                         $urls_table .= format_repo_url("Fetch URL", $fetch);
6096                         $urls_table .= format_repo_url("Push URL", $push) if defined $push;
6097                 }
6098         } elsif (defined $push) {
6099                 $urls_table .= format_repo_url("Push URL", $push);
6100         } else {
6101                 $urls_table .= format_repo_url("", "No remote URL");
6102         }
6103
6104         $urls_table .= "</table>\n";
6105
6106         my $dots;
6107         if (defined $limit && $limit < @$heads) {
6108                 $dots = $cgi->a({-href => href(action=>"remotes", hash=>$remote)}, "...");
6109         }
6110
6111         print $urls_table;
6112         git_heads_body($heads, $head, 0, $limit, $dots);
6113 }
6114
6115 # Display a list of remote names with the respective fetch and push URLs
6116 sub git_remotes_list {
6117         my ($remotedata, $limit) = @_;
6118         print "<table class=\"heads\">\n";
6119         my $alternate = 1;
6120         my @remotes = sort keys %$remotedata;
6121
6122         my $limited = $limit && $limit < @remotes;
6123
6124         $#remotes = $limit - 1 if $limited;
6125
6126         while (my $remote = shift @remotes) {
6127                 my $rdata = $remotedata->{$remote};
6128                 my $fetch = $rdata->{'fetch'};
6129                 my $push = $rdata->{'push'};
6130                 if ($alternate) {
6131                         print "<tr class=\"dark\">\n";
6132                 } else {
6133                         print "<tr class=\"light\">\n";
6134                 }
6135                 $alternate ^= 1;
6136                 print "<td>" .
6137                       $cgi->a({-href=> href(action=>'remotes', hash=>$remote),
6138                                -class=> "list name"},esc_html($remote)) .
6139                       "</td>";
6140                 print "<td class=\"link\">" .
6141                       (defined $fetch ? $cgi->a({-href=> $fetch}, "fetch") : "fetch") .
6142                       " | " .
6143                       (defined $push ? $cgi->a({-href=> $push}, "push") : "push") .
6144                       "</td>";
6145
6146                 print "</tr>\n";
6147         }
6148
6149         if ($limited) {
6150                 print "<tr>\n" .
6151                       "<td colspan=\"3\">" .
6152                       $cgi->a({-href => href(action=>"remotes")}, "...") .
6153                       "</td>\n" . "</tr>\n";
6154         }
6155
6156         print "</table>";
6157 }
6158
6159 # Display remote heads grouped by remote, unless there are too many
6160 # remotes, in which case we only display the remote names
6161 sub git_remotes_body {
6162         my ($remotedata, $limit, $head) = @_;
6163         if ($limit and $limit < keys %$remotedata) {
6164                 git_remotes_list($remotedata, $limit);
6165         } else {
6166                 fill_remote_heads($remotedata);
6167                 while (my ($remote, $rdata) = each %$remotedata) {
6168                         git_print_section({-class=>"remote", -id=>$remote},
6169                                 ["remotes", $remote, $remote], sub {
6170                                         git_remote_block($remote, $rdata, $limit, $head);
6171                                 });
6172                 }
6173         }
6174 }
6175
6176 sub git_search_message {
6177         my %co = @_;
6178
6179         my $greptype;
6180         if ($searchtype eq 'commit') {
6181                 $greptype = "--grep=";
6182         } elsif ($searchtype eq 'author') {
6183                 $greptype = "--author=";
6184         } elsif ($searchtype eq 'committer') {
6185                 $greptype = "--committer=";
6186         }
6187         $greptype .= $searchtext;
6188         my @commitlist = parse_commits($hash, 101, (100 * $page), undef,
6189                                        $greptype, '--regexp-ignore-case',
6190                                        $search_use_regexp ? '--extended-regexp' : '--fixed-strings');
6191
6192         my $paging_nav = '';
6193         if ($page > 0) {
6194                 $paging_nav .=
6195                         $cgi->a({-href => href(-replay=>1, page=>undef)},
6196                                 "first") .
6197                         " &sdot; " .
6198                         $cgi->a({-href => href(-replay=>1, page=>$page-1),
6199                                  -accesskey => "p", -title => "Alt-p"}, "prev");
6200         } else {
6201                 $paging_nav .= "first &sdot; prev";
6202         }
6203         my $next_link = '';
6204         if ($#commitlist >= 100) {
6205                 $next_link =
6206                         $cgi->a({-href => href(-replay=>1, page=>$page+1),
6207                                  -accesskey => "n", -title => "Alt-n"}, "next");
6208                 $paging_nav .= " &sdot; $next_link";
6209         } else {
6210                 $paging_nav .= " &sdot; next";
6211         }
6212
6213         git_header_html();
6214
6215         git_print_page_nav('','', $hash,$co{'tree'},$hash, $paging_nav);
6216         git_print_header_div('commit', esc_html($co{'title'}), $hash);
6217         if ($page == 0 && !@commitlist) {
6218                 print "<p>No match.</p>\n";
6219         } else {
6220                 git_search_grep_body(\@commitlist, 0, 99, $next_link);
6221         }
6222
6223         git_footer_html();
6224 }
6225
6226 sub git_search_changes {
6227         my %co = @_;
6228
6229         local $/ = "\n";
6230         open my $fd, '-|', git_cmd(), '--no-pager', 'log', @diff_opts,
6231                 '--pretty=format:%H', '--no-abbrev', '--raw', "-S$searchtext",
6232                 ($search_use_regexp ? '--pickaxe-regex' : ())
6233                         or die_error(500, "Open git-log failed");
6234
6235         git_header_html();
6236
6237         git_print_page_nav('','', $hash,$co{'tree'},$hash);
6238         git_print_header_div('commit', esc_html($co{'title'}), $hash);
6239
6240         print "<table class=\"pickaxe search\">\n";
6241         my $alternate = 1;
6242         undef %co;
6243         my @files;
6244         while (my $line = <$fd>) {
6245                 chomp $line;
6246                 next unless $line;
6247
6248                 my %set = parse_difftree_raw_line($line);
6249                 if (defined $set{'commit'}) {
6250                         # finish previous commit
6251                         if (%co) {
6252                                 print "</td>\n" .
6253                                       "<td class=\"link\">" .
6254                                       $cgi->a({-href => href(action=>"commit", hash=>$co{'id'})},
6255                                               "commit") .
6256                                       " | " .
6257                                       $cgi->a({-href => href(action=>"tree", hash=>$co{'tree'},
6258                                                              hash_base=>$co{'id'})},
6259                                               "tree") .
6260                                       "</td>\n" .
6261                                       "</tr>\n";
6262                         }
6263
6264                         if ($alternate) {
6265                                 print "<tr class=\"dark\">\n";
6266                         } else {
6267                                 print "<tr class=\"light\">\n";
6268                         }
6269                         $alternate ^= 1;
6270                         %co = parse_commit($set{'commit'});
6271                         my $author = chop_and_escape_str($co{'author_name'}, 15, 5);
6272                         print "<td title=\"$co{'age_string_age'}\"><i>$co{'age_string_date'}</i></td>\n" .
6273                               "<td><i>$author</i></td>\n" .
6274                               "<td>" .
6275                               $cgi->a({-href => href(action=>"commit", hash=>$co{'id'}),
6276                                       -class => "list subject"},
6277                                       chop_and_escape_str($co{'title'}, 50) . "<br/>");
6278                 } elsif (defined $set{'to_id'}) {
6279                         next if ($set{'to_id'} =~ m/^0{40}$/);
6280
6281                         print $cgi->a({-href => href(action=>"blob", hash_base=>$co{'id'},
6282                                                      hash=>$set{'to_id'}, file_name=>$set{'to_file'}),
6283                                       -class => "list"},
6284                                       "<span class=\"match\">" . esc_path($set{'file'}) . "</span>") .
6285                               "<br/>\n";
6286                 }
6287         }
6288         close $fd;
6289
6290         # finish last commit (warning: repetition!)
6291         if (%co) {
6292                 print "</td>\n" .
6293                       "<td class=\"link\">" .
6294                       $cgi->a({-href => href(action=>"commit", hash=>$co{'id'})},
6295                               "commit") .
6296                       " | " .
6297                       $cgi->a({-href => href(action=>"tree", hash=>$co{'tree'},
6298                                              hash_base=>$co{'id'})},
6299                               "tree") .
6300                       "</td>\n" .
6301                       "</tr>\n";
6302         }
6303
6304         print "</table>\n";
6305
6306         git_footer_html();
6307 }
6308
6309 sub git_search_files {
6310         my %co = @_;
6311
6312         local $/ = "\n";
6313         open my $fd, "-|", git_cmd(), 'grep', '-n', '-z',
6314                 $search_use_regexp ? ('-E', '-i') : '-F',
6315                 $searchtext, $co{'tree'}
6316                         or die_error(500, "Open git-grep failed");
6317
6318         git_header_html();
6319
6320         git_print_page_nav('','', $hash,$co{'tree'},$hash);
6321         git_print_header_div('commit', esc_html($co{'title'}), $hash);
6322
6323         print "<table class=\"grep_search\">\n";
6324         my $alternate = 1;
6325         my $matches = 0;
6326         my $lastfile = '';
6327         my $file_href;
6328         while (my $line = <$fd>) {
6329                 chomp $line;
6330                 my ($file, $lno, $ltext, $binary);
6331                 last if ($matches++ > 1000);
6332                 if ($line =~ /^Binary file (.+) matches$/) {
6333                         $file = $1;
6334                         $binary = 1;
6335                 } else {
6336                         ($file, $lno, $ltext) = split(/\0/, $line, 3);
6337                         $file =~ s/^$co{'tree'}://;
6338                 }
6339                 if ($file ne $lastfile) {
6340                         $lastfile and print "</td></tr>\n";
6341                         if ($alternate++) {
6342                                 print "<tr class=\"dark\">\n";
6343                         } else {
6344                                 print "<tr class=\"light\">\n";
6345                         }
6346                         $file_href = href(action=>"blob", hash_base=>$co{'id'},
6347                                           file_name=>$file);
6348                         print "<td class=\"list\">".
6349                                 $cgi->a({-href => $file_href, -class => "list"}, esc_path($file));
6350                         print "</td><td>\n";
6351                         $lastfile = $file;
6352                 }
6353                 if ($binary) {
6354                         print "<div class=\"binary\">Binary file</div>\n";
6355                 } else {
6356                         $ltext = untabify($ltext);
6357                         if ($ltext =~ m/^(.*)($search_regexp)(.*)$/i) {
6358                                 $ltext = esc_html($1, -nbsp=>1);
6359                                 $ltext .= '<span class="match">';
6360                                 $ltext .= esc_html($2, -nbsp=>1);
6361                                 $ltext .= '</span>';
6362                                 $ltext .= esc_html($3, -nbsp=>1);
6363                         } else {
6364                                 $ltext = esc_html($ltext, -nbsp=>1);
6365                         }
6366                         print "<div class=\"pre\">" .
6367                                 $cgi->a({-href => $file_href.'#l'.$lno,
6368                                         -class => "linenr"}, sprintf('%4i', $lno)) .
6369                                 ' ' .  $ltext . "</div>\n";
6370                 }
6371         }
6372         if ($lastfile) {
6373                 print "</td></tr>\n";
6374                 if ($matches > 1000) {
6375                         print "<div class=\"diff nodifferences\">Too many matches, listing trimmed</div>\n";
6376                 }
6377         } else {
6378                 print "<div class=\"diff nodifferences\">No matches found</div>\n";
6379         }
6380         close $fd;
6381
6382         print "</table>\n";
6383
6384         git_footer_html();
6385 }
6386
6387 sub git_search_grep_body {
6388         my ($commitlist, $from, $to, $extra) = @_;
6389         $from = 0 unless defined $from;
6390         $to = $#{$commitlist} if (!defined $to || $#{$commitlist} < $to);
6391
6392         print "<table class=\"commit_search\">\n";
6393         my $alternate = 1;
6394         for (my $i = $from; $i <= $to; $i++) {
6395                 my %co = %{$commitlist->[$i]};
6396                 if (!%co) {
6397                         next;
6398                 }
6399                 my $commit = $co{'id'};
6400                 if ($alternate) {
6401                         print "<tr class=\"dark\">\n";
6402                 } else {
6403                         print "<tr class=\"light\">\n";
6404                 }
6405                 $alternate ^= 1;
6406                 print "<td title=\"$co{'age_string_age'}\"><i>$co{'age_string_date'}</i></td>\n" .
6407                       format_author_html('td', \%co, 15, 5) .
6408                       "<td>" .
6409                       $cgi->a({-href => href(action=>"commit", hash=>$co{'id'}),
6410                                -class => "list subject"},
6411                               chop_and_escape_str($co{'title'}, 50) . "<br/>");
6412                 my $comment = $co{'comment'};
6413                 foreach my $line (@$comment) {
6414                         if ($line =~ m/^(.*?)($search_regexp)(.*)$/i) {
6415                                 my ($lead, $match, $trail) = ($1, $2, $3);
6416                                 $match = chop_str($match, 70, 5, 'center');
6417                                 my $contextlen = int((80 - length($match))/2);
6418                                 $contextlen = 30 if ($contextlen > 30);
6419                                 $lead  = chop_str($lead,  $contextlen, 10, 'left');
6420                                 $trail = chop_str($trail, $contextlen, 10, 'right');
6421
6422                                 $lead  = esc_html($lead);
6423                                 $match = esc_html($match);
6424                                 $trail = esc_html($trail);
6425
6426                                 print "$lead<span class=\"match\">$match</span>$trail<br />";
6427                         }
6428                 }
6429                 print "</td>\n" .
6430                       "<td class=\"link\">" .
6431                       $cgi->a({-href => href(action=>"commit", hash=>$co{'id'})}, "commit") .
6432                       " | " .
6433                       $cgi->a({-href => href(action=>"commitdiff", hash=>$co{'id'})}, "commitdiff") .
6434                       " | " .
6435                       $cgi->a({-href => href(action=>"tree", hash=>$co{'tree'}, hash_base=>$co{'id'})}, "tree");
6436                 print "</td>\n" .
6437                       "</tr>\n";
6438         }
6439         if (defined $extra) {
6440                 print "<tr>\n" .
6441                       "<td colspan=\"3\">$extra</td>\n" .
6442                       "</tr>\n";
6443         }
6444         print "</table>\n";
6445 }
6446
6447 ## ======================================================================
6448 ## ======================================================================
6449 ## actions
6450
6451 sub git_project_list {
6452         my $order = $input_params{'order'};
6453         if (defined $order && $order !~ m/none|project|descr|owner|age/) {
6454                 die_error(400, "Unknown order parameter");
6455         }
6456
6457         my @list = git_get_projects_list($project_filter, $strict_export);
6458         if (!@list) {
6459                 die_error(404, "No projects found");
6460         }
6461
6462         git_header_html();
6463         if (defined $home_text && -f $home_text) {
6464                 print "<div class=\"index_include\">\n";
6465                 insert_file($home_text);
6466                 print "</div>\n";
6467         }
6468
6469         git_project_search_form($searchtext, $search_use_regexp);
6470         git_project_list_body(\@list, $order);
6471         git_footer_html();
6472 }
6473
6474 sub git_forks {
6475         my $order = $input_params{'order'};
6476         if (defined $order && $order !~ m/none|project|descr|owner|age/) {
6477                 die_error(400, "Unknown order parameter");
6478         }
6479
6480         my $filter = $project;
6481         $filter =~ s/\.git$//;
6482         my @list = git_get_projects_list($filter);
6483         if (!@list) {
6484                 die_error(404, "No forks found");
6485         }
6486
6487         git_header_html();
6488         git_print_page_nav('','');
6489         git_print_header_div('summary', "$project forks");
6490         git_project_list_body(\@list, $order);
6491         git_footer_html();
6492 }
6493
6494 sub git_project_index {
6495         my @projects = git_get_projects_list($project_filter, $strict_export);
6496         if (!@projects) {
6497                 die_error(404, "No projects found");
6498         }
6499
6500         print $cgi->header(
6501                 -type => 'text/plain',
6502                 -charset => 'utf-8',
6503                 -content_disposition => 'inline; filename="index.aux"');
6504
6505         foreach my $pr (@projects) {
6506                 if (!exists $pr->{'owner'}) {
6507                         $pr->{'owner'} = git_get_project_owner("$pr->{'path'}");
6508                 }
6509
6510                 my ($path, $owner) = ($pr->{'path'}, $pr->{'owner'});
6511                 # quote as in CGI::Util::encode, but keep the slash, and use '+' for ' '
6512                 $path  =~ s/([^a-zA-Z0-9_.\-\/ ])/sprintf("%%%02X", ord($1))/eg;
6513                 $owner =~ s/([^a-zA-Z0-9_.\-\/ ])/sprintf("%%%02X", ord($1))/eg;
6514                 $path  =~ s/ /\+/g;
6515                 $owner =~ s/ /\+/g;
6516
6517                 print "$path $owner\n";
6518         }
6519 }
6520
6521 sub git_summary {
6522         my $descr = git_get_project_description($project) || "none";
6523         my %co = parse_commit("HEAD");
6524         my %cd = %co ? parse_date($co{'committer_epoch'}, $co{'committer_tz'}) : ();
6525         my $head = $co{'id'};
6526         my $remote_heads = gitweb_check_feature('remote_heads');
6527
6528         my $owner = git_get_project_owner($project);
6529
6530         my $refs = git_get_references();
6531         # These get_*_list functions return one more to allow us to see if
6532         # there are more ...
6533         my @taglist  = git_get_tags_list(16);
6534         my @headlist = git_get_heads_list(16);
6535         my %remotedata = $remote_heads ? git_get_remotes_list() : ();
6536         my @forklist;
6537         my $check_forks = gitweb_check_feature('forks');
6538
6539         if ($check_forks) {
6540                 # find forks of a project
6541                 my $filter = $project;
6542                 $filter =~ s/\.git$//;
6543                 @forklist = git_get_projects_list($filter);
6544                 # filter out forks of forks
6545                 @forklist = filter_forks_from_projects_list(\@forklist)
6546                         if (@forklist);
6547         }
6548
6549         git_header_html();
6550         git_print_page_nav('summary','', $head);
6551
6552         print "<div class=\"title\">&nbsp;</div>\n";
6553         print "<table class=\"projects_list\">\n" .
6554               "<tr id=\"metadata_desc\"><td>description</td><td>" . esc_html($descr) . "</td></tr>\n";
6555         if ($owner and not $omit_owner) {
6556                 print  "<tr id=\"metadata_owner\"><td>owner</td><td>" . esc_html($owner) . "</td></tr>\n";
6557         }
6558         if (defined $cd{'rfc2822'}) {
6559                 print "<tr id=\"metadata_lchange\"><td>last change</td>" .
6560                       "<td>".format_timestamp_html(\%cd)."</td></tr>\n";
6561         }
6562
6563         # use per project git URL list in $projectroot/$project/cloneurl
6564         # or make project git URL from git base URL and project name
6565         my $url_tag = "URL";
6566         my @url_list = git_get_project_url_list($project);
6567         @url_list = map { "$_/$project" } @git_base_url_list unless @url_list;
6568         foreach my $git_url (@url_list) {
6569                 next unless $git_url;
6570                 print format_repo_url($url_tag, $git_url);
6571                 $url_tag = "";
6572         }
6573
6574         # Tag cloud
6575         my $show_ctags = gitweb_check_feature('ctags');
6576         if ($show_ctags) {
6577                 my $ctags = git_get_project_ctags($project);
6578                 if (%$ctags) {
6579                         # without ability to add tags, don't show if there are none
6580                         my $cloud = git_populate_project_tagcloud($ctags);
6581                         print "<tr id=\"metadata_ctags\">" .
6582                               "<td>content tags</td>" .
6583                               "<td>".git_show_project_tagcloud($cloud, 48)."</td>" .
6584                               "</tr>\n";
6585                 }
6586         }
6587
6588         print "</table>\n";
6589
6590         # If XSS prevention is on, we don't include README.html.
6591         # TODO: Allow a readme in some safe format.
6592         if (!$prevent_xss && -s "$projectroot/$project/README.html") {
6593                 print "<div class=\"title\">readme</div>\n" .
6594                       "<div class=\"readme\">\n";
6595                 insert_file("$projectroot/$project/README.html");
6596                 print "\n</div>\n"; # class="readme"
6597         }
6598
6599         # we need to request one more than 16 (0..15) to check if
6600         # those 16 are all
6601         my @commitlist = $head ? parse_commits($head, 17) : ();
6602         if (@commitlist) {
6603                 git_print_header_div('shortlog');
6604                 git_shortlog_body(\@commitlist, 0, 15, $refs,
6605                                   $#commitlist <=  15 ? undef :
6606                                   $cgi->a({-href => href(action=>"shortlog")}, "..."));
6607         }
6608
6609         if (@taglist) {
6610                 git_print_header_div('tags');
6611                 git_tags_body(\@taglist, 0, 15,
6612                               $#taglist <=  15 ? undef :
6613                               $cgi->a({-href => href(action=>"tags")}, "..."));
6614         }
6615
6616         if (@headlist) {
6617                 git_print_header_div('heads');
6618                 git_heads_body(\@headlist, $head, 0, 15,
6619                                $#headlist <= 15 ? undef :
6620                                $cgi->a({-href => href(action=>"heads")}, "..."));
6621         }
6622
6623         if (%remotedata) {
6624                 git_print_header_div('remotes');
6625                 git_remotes_body(\%remotedata, 15, $head);
6626         }
6627
6628         if (@forklist) {
6629                 git_print_header_div('forks');
6630                 git_project_list_body(\@forklist, 'age', 0, 15,
6631                                       $#forklist <= 15 ? undef :
6632                                       $cgi->a({-href => href(action=>"forks")}, "..."),
6633                                       'no_header');
6634         }
6635
6636         git_footer_html();
6637 }
6638
6639 sub git_tag {
6640         my %tag = parse_tag($hash);
6641
6642         if (! %tag) {
6643                 die_error(404, "Unknown tag object");
6644         }
6645
6646         my $head = git_get_head_hash($project);
6647         git_header_html();
6648         git_print_page_nav('','', $head,undef,$head);
6649         git_print_header_div('commit', esc_html($tag{'name'}), $hash);
6650         print "<div class=\"title_text\">\n" .
6651               "<table class=\"object_header\">\n" .
6652               "<tr>\n" .
6653               "<td>object</td>\n" .
6654               "<td>" . $cgi->a({-class => "list", -href => href(action=>$tag{'type'}, hash=>$tag{'object'})},
6655                                $tag{'object'}) . "</td>\n" .
6656               "<td class=\"link\">" . $cgi->a({-href => href(action=>$tag{'type'}, hash=>$tag{'object'})},
6657                                               $tag{'type'}) . "</td>\n" .
6658               "</tr>\n";
6659         if (defined($tag{'author'})) {
6660                 git_print_authorship_rows(\%tag, 'author');
6661         }
6662         print "</table>\n\n" .
6663               "</div>\n";
6664         print "<div class=\"page_body\">";
6665         my $comment = $tag{'comment'};
6666         foreach my $line (@$comment) {
6667                 chomp $line;
6668                 print esc_html($line, -nbsp=>1) . "<br/>\n";
6669         }
6670         print "</div>\n";
6671         git_footer_html();
6672 }
6673
6674 sub git_blame_common {
6675         my $format = shift || 'porcelain';
6676         if ($format eq 'porcelain' && $input_params{'javascript'}) {
6677                 $format = 'incremental';
6678                 $action = 'blame_incremental'; # for page title etc
6679         }
6680
6681         # permissions
6682         gitweb_check_feature('blame')
6683                 or die_error(403, "Blame view not allowed");
6684
6685         # error checking
6686         die_error(400, "No file name given") unless $file_name;
6687         $hash_base ||= git_get_head_hash($project);
6688         die_error(404, "Couldn't find base commit") unless $hash_base;
6689         my %co = parse_commit($hash_base)
6690                 or die_error(404, "Commit not found");
6691         my $ftype = "blob";
6692         if (!defined $hash) {
6693                 $hash = git_get_hash_by_path($hash_base, $file_name, "blob")
6694                         or die_error(404, "Error looking up file");
6695         } else {
6696                 $ftype = git_get_type($hash);
6697                 if ($ftype !~ "blob") {
6698                         die_error(400, "Object is not a blob");
6699                 }
6700         }
6701
6702         my $fd;
6703         if ($format eq 'incremental') {
6704                 # get file contents (as base)
6705                 open $fd, "-|", git_cmd(), 'cat-file', 'blob', $hash
6706                         or die_error(500, "Open git-cat-file failed");
6707         } elsif ($format eq 'data') {
6708                 # run git-blame --incremental
6709                 open $fd, "-|", git_cmd(), "blame", "--incremental",
6710                         $hash_base, "--", $file_name
6711                         or die_error(500, "Open git-blame --incremental failed");
6712         } else {
6713                 # run git-blame --porcelain
6714                 open $fd, "-|", git_cmd(), "blame", '-p',
6715                         $hash_base, '--', $file_name
6716                         or die_error(500, "Open git-blame --porcelain failed");
6717         }
6718         binmode $fd, ':utf8';
6719
6720         # incremental blame data returns early
6721         if ($format eq 'data') {
6722                 print $cgi->header(
6723                         -type=>"text/plain", -charset => "utf-8",
6724                         -status=> "200 OK");
6725                 local $| = 1; # output autoflush
6726                 while (my $line = <$fd>) {
6727                         print to_utf8($line);
6728                 }
6729                 close $fd
6730                         or print "ERROR $!\n";
6731
6732                 print 'END';
6733                 if (defined $t0 && gitweb_check_feature('timed')) {
6734                         print ' '.
6735                               tv_interval($t0, [ gettimeofday() ]).
6736                               ' '.$number_of_git_cmds;
6737                 }
6738                 print "\n";
6739
6740                 return;
6741         }
6742
6743         # page header
6744         git_header_html();
6745         my $formats_nav =
6746                 $cgi->a({-href => href(action=>"blob", -replay=>1)},
6747                         "blob") .
6748                 " | ";
6749         if ($format eq 'incremental') {
6750                 $formats_nav .=
6751                         $cgi->a({-href => href(action=>"blame", javascript=>0, -replay=>1)},
6752                                 "blame") . " (non-incremental)";
6753         } else {
6754                 $formats_nav .=
6755                         $cgi->a({-href => href(action=>"blame_incremental", -replay=>1)},
6756                                 "blame") . " (incremental)";
6757         }
6758         $formats_nav .=
6759                 " | " .
6760                 $cgi->a({-href => href(action=>"history", -replay=>1)},
6761                         "history") .
6762                 " | " .
6763                 $cgi->a({-href => href(action=>$action, file_name=>$file_name)},
6764                         "HEAD");
6765         git_print_page_nav('','', $hash_base,$co{'tree'},$hash_base, $formats_nav);
6766         git_print_header_div('commit', esc_html($co{'title'}), $hash_base);
6767         git_print_page_path($file_name, $ftype, $hash_base);
6768
6769         # page body
6770         if ($format eq 'incremental') {
6771                 print "<noscript>\n<div class=\"error\"><center><b>\n".
6772                       "This page requires JavaScript to run.\n Use ".
6773                       $cgi->a({-href => href(action=>'blame',javascript=>0,-replay=>1)},
6774                               'this page').
6775                       " instead.\n".
6776                       "</b></center></div>\n</noscript>\n";
6777
6778                 print qq!<div id="progress_bar" style="width: 100%; background-color: yellow"></div>\n!;
6779         }
6780
6781         print qq!<div class="page_body">\n!;
6782         print qq!<div id="progress_info">... / ...</div>\n!
6783                 if ($format eq 'incremental');
6784         print qq!<table id="blame_table" class="blame" width="100%">\n!.
6785               #qq!<col width="5.5em" /><col width="2.5em" /><col width="*" />\n!.
6786               qq!<thead>\n!.
6787               qq!<tr><th>Commit</th><th>Line</th><th>Data</th></tr>\n!.
6788               qq!</thead>\n!.
6789               qq!<tbody>\n!;
6790
6791         my @rev_color = qw(light dark);
6792         my $num_colors = scalar(@rev_color);
6793         my $current_color = 0;
6794
6795         if ($format eq 'incremental') {
6796                 my $color_class = $rev_color[$current_color];
6797
6798                 #contents of a file
6799                 my $linenr = 0;
6800         LINE:
6801                 while (my $line = <$fd>) {
6802                         chomp $line;
6803                         $linenr++;
6804
6805                         print qq!<tr id="l$linenr" class="$color_class">!.
6806                               qq!<td class="sha1"><a href=""> </a></td>!.
6807                               qq!<td class="linenr">!.
6808                               qq!<a class="linenr" href="">$linenr</a></td>!;
6809                         print qq!<td class="pre">! . esc_html($line) . "</td>\n";
6810                         print qq!</tr>\n!;
6811                 }
6812
6813         } else { # porcelain, i.e. ordinary blame
6814                 my %metainfo = (); # saves information about commits
6815
6816                 # blame data
6817         LINE:
6818                 while (my $line = <$fd>) {
6819                         chomp $line;
6820                         # the header: <SHA-1> <src lineno> <dst lineno> [<lines in group>]
6821                         # no <lines in group> for subsequent lines in group of lines
6822                         my ($full_rev, $orig_lineno, $lineno, $group_size) =
6823                            ($line =~ /^([0-9a-f]{40}) (\d+) (\d+)(?: (\d+))?$/);
6824                         if (!exists $metainfo{$full_rev}) {
6825                                 $metainfo{$full_rev} = { 'nprevious' => 0 };
6826                         }
6827                         my $meta = $metainfo{$full_rev};
6828                         my $data;
6829                         while ($data = <$fd>) {
6830                                 chomp $data;
6831                                 last if ($data =~ s/^\t//); # contents of line
6832                                 if ($data =~ /^(\S+)(?: (.*))?$/) {
6833                                         $meta->{$1} = $2 unless exists $meta->{$1};
6834                                 }
6835                                 if ($data =~ /^previous /) {
6836                                         $meta->{'nprevious'}++;
6837                                 }
6838                         }
6839                         my $short_rev = substr($full_rev, 0, 8);
6840                         my $author = $meta->{'author'};
6841                         my %date =
6842                                 parse_date($meta->{'author-time'}, $meta->{'author-tz'});
6843                         my $date = $date{'iso-tz'};
6844                         if ($group_size) {
6845                                 $current_color = ($current_color + 1) % $num_colors;
6846                         }
6847                         my $tr_class = $rev_color[$current_color];
6848                         $tr_class .= ' boundary' if (exists $meta->{'boundary'});
6849                         $tr_class .= ' no-previous' if ($meta->{'nprevious'} == 0);
6850                         $tr_class .= ' multiple-previous' if ($meta->{'nprevious'} > 1);
6851                         print "<tr id=\"l$lineno\" class=\"$tr_class\">\n";
6852                         if ($group_size) {
6853                                 print "<td class=\"sha1\"";
6854                                 print " title=\"". esc_html($author) . ", $date\"";
6855                                 print " rowspan=\"$group_size\"" if ($group_size > 1);
6856                                 print ">";
6857                                 print $cgi->a({-href => href(action=>"commit",
6858                                                              hash=>$full_rev,
6859                                                              file_name=>$file_name)},
6860                                               esc_html($short_rev));
6861                                 if ($group_size >= 2) {
6862                                         my @author_initials = ($author =~ /\b([[:upper:]])\B/g);
6863                                         if (@author_initials) {
6864                                                 print "<br />" .
6865                                                       esc_html(join('', @author_initials));
6866                                                 #           or join('.', ...)
6867                                         }
6868                                 }
6869                                 print "</td>\n";
6870                         }
6871                         # 'previous' <sha1 of parent commit> <filename at commit>
6872                         if (exists $meta->{'previous'} &&
6873                             $meta->{'previous'} =~ /^([a-fA-F0-9]{40}) (.*)$/) {
6874                                 $meta->{'parent'} = $1;
6875                                 $meta->{'file_parent'} = unquote($2);
6876                         }
6877                         my $linenr_commit =
6878                                 exists($meta->{'parent'}) ?
6879                                 $meta->{'parent'} : $full_rev;
6880                         my $linenr_filename =
6881                                 exists($meta->{'file_parent'}) ?
6882                                 $meta->{'file_parent'} : unquote($meta->{'filename'});
6883                         my $blamed = href(action => 'blame',
6884                                           file_name => $linenr_filename,
6885                                           hash_base => $linenr_commit);
6886                         print "<td class=\"linenr\">";
6887                         print $cgi->a({ -href => "$blamed#l$orig_lineno",
6888                                         -class => "linenr" },
6889                                       esc_html($lineno));
6890                         print "</td>";
6891                         print "<td class=\"pre\">" . esc_html($data) . "</td>\n";
6892                         print "</tr>\n";
6893                 } # end while
6894
6895         }
6896
6897         # footer
6898         print "</tbody>\n".
6899               "</table>\n"; # class="blame"
6900         print "</div>\n";   # class="blame_body"
6901         close $fd
6902                 or print "Reading blob failed\n";
6903
6904         git_footer_html();
6905 }
6906
6907 sub git_blame {
6908         git_blame_common();
6909 }
6910
6911 sub git_blame_incremental {
6912         git_blame_common('incremental');
6913 }
6914
6915 sub git_blame_data {
6916         git_blame_common('data');
6917 }
6918
6919 sub git_tags {
6920         my $head = git_get_head_hash($project);
6921         git_header_html();
6922         git_print_page_nav('','', $head,undef,$head,format_ref_views('tags'));
6923         git_print_header_div('summary', $project);
6924
6925         my @tagslist = git_get_tags_list();
6926         if (@tagslist) {
6927                 git_tags_body(\@tagslist);
6928         }
6929         git_footer_html();
6930 }
6931
6932 sub git_heads {
6933         my $head = git_get_head_hash($project);
6934         git_header_html();
6935         git_print_page_nav('','', $head,undef,$head,format_ref_views('heads'));
6936         git_print_header_div('summary', $project);
6937
6938         my @headslist = git_get_heads_list();
6939         if (@headslist) {
6940                 git_heads_body(\@headslist, $head);
6941         }
6942         git_footer_html();
6943 }
6944
6945 # used both for single remote view and for list of all the remotes
6946 sub git_remotes {
6947         gitweb_check_feature('remote_heads')
6948                 or die_error(403, "Remote heads view is disabled");
6949
6950         my $head = git_get_head_hash($project);
6951         my $remote = $input_params{'hash'};
6952
6953         my $remotedata = git_get_remotes_list($remote);
6954         die_error(500, "Unable to get remote information") unless defined $remotedata;
6955
6956         unless (%$remotedata) {
6957                 die_error(404, defined $remote ?
6958                         "Remote $remote not found" :
6959                         "No remotes found");
6960         }
6961
6962         git_header_html(undef, undef, -action_extra => $remote);
6963         git_print_page_nav('', '',  $head, undef, $head,
6964                 format_ref_views($remote ? '' : 'remotes'));
6965
6966         fill_remote_heads($remotedata);
6967         if (defined $remote) {
6968                 git_print_header_div('remotes', "$remote remote for $project");
6969                 git_remote_block($remote, $remotedata->{$remote}, undef, $head);
6970         } else {
6971                 git_print_header_div('summary', "$project remotes");
6972                 git_remotes_body($remotedata, undef, $head);
6973         }
6974
6975         git_footer_html();
6976 }
6977
6978 sub git_blob_plain {
6979         my $type = shift;
6980         my $expires;
6981
6982         if (!defined $hash) {
6983                 if (defined $file_name) {
6984                         my $base = $hash_base || git_get_head_hash($project);
6985                         $hash = git_get_hash_by_path($base, $file_name, "blob")
6986                                 or die_error(404, "Cannot find file");
6987                 } else {
6988                         die_error(400, "No file name defined");
6989                 }
6990         } elsif ($hash =~ m/^[0-9a-fA-F]{40}$/) {
6991                 # blobs defined by non-textual hash id's can be cached
6992                 $expires = "+1d";
6993         }
6994
6995         open my $fd, "-|", git_cmd(), "cat-file", "blob", $hash
6996                 or die_error(500, "Open git-cat-file blob '$hash' failed");
6997
6998         # content-type (can include charset)
6999         $type = blob_contenttype($fd, $file_name, $type);
7000
7001         # "save as" filename, even when no $file_name is given
7002         my $save_as = "$hash";
7003         if (defined $file_name) {
7004                 $save_as = $file_name;
7005         } elsif ($type =~ m/^text\//) {
7006                 $save_as .= '.txt';
7007         }
7008
7009         # With XSS prevention on, blobs of all types except a few known safe
7010         # ones are served with "Content-Disposition: attachment" to make sure
7011         # they don't run in our security domain.  For certain image types,
7012         # blob view writes an <img> tag referring to blob_plain view, and we
7013         # want to be sure not to break that by serving the image as an
7014         # attachment (though Firefox 3 doesn't seem to care).
7015         my $sandbox = $prevent_xss &&
7016                 $type !~ m!^(?:text/[a-z]+|image/(?:gif|png|jpeg))(?:[ ;]|$)!;
7017
7018         # serve text/* as text/plain
7019         if ($prevent_xss &&
7020             ($type =~ m!^text/[a-z]+\b(.*)$! ||
7021              ($type =~ m!^[a-z]+/[a-z]\+xml\b(.*)$! && -T $fd))) {
7022                 my $rest = $1;
7023                 $rest = defined $rest ? $rest : '';
7024                 $type = "text/plain$rest";
7025         }
7026
7027         print $cgi->header(
7028                 -type => $type,
7029                 -expires => $expires,
7030                 -content_disposition =>
7031                         ($sandbox ? 'attachment' : 'inline')
7032                         . '; filename="' . $save_as . '"');
7033         local $/ = undef;
7034         binmode STDOUT, ':raw';
7035         print <$fd>;
7036         binmode STDOUT, ':utf8'; # as set at the beginning of gitweb.cgi
7037         close $fd;
7038 }
7039
7040 sub git_blob {
7041         my $expires;
7042
7043         if (!defined $hash) {
7044                 if (defined $file_name) {
7045                         my $base = $hash_base || git_get_head_hash($project);
7046                         $hash = git_get_hash_by_path($base, $file_name, "blob")
7047                                 or die_error(404, "Cannot find file");
7048                 } else {
7049                         die_error(400, "No file name defined");
7050                 }
7051         } elsif ($hash =~ m/^[0-9a-fA-F]{40}$/) {
7052                 # blobs defined by non-textual hash id's can be cached
7053                 $expires = "+1d";
7054         }
7055
7056         my $have_blame = gitweb_check_feature('blame');
7057         open my $fd, "-|", git_cmd(), "cat-file", "blob", $hash
7058                 or die_error(500, "Couldn't cat $file_name, $hash");
7059         my $mimetype = blob_mimetype($fd, $file_name);
7060         # use 'blob_plain' (aka 'raw') view for files that cannot be displayed
7061         if ($mimetype !~ m!^(?:text/|image/(?:gif|png|jpeg)$)! && -B $fd) {
7062                 close $fd;
7063                 return git_blob_plain($mimetype);
7064         }
7065         # we can have blame only for text/* mimetype
7066         $have_blame &&= ($mimetype =~ m!^text/!);
7067
7068         my $highlight = gitweb_check_feature('highlight');
7069         my $syntax = guess_file_syntax($highlight, $mimetype, $file_name);
7070         $fd = run_highlighter($fd, $highlight, $syntax);
7071
7072         git_header_html(undef, $expires);
7073         my $formats_nav = '';
7074         if (defined $hash_base && (my %co = parse_commit($hash_base))) {
7075                 if (defined $file_name) {
7076                         if ($have_blame) {
7077                                 $formats_nav .=
7078                                         $cgi->a({-href => href(action=>"blame", -replay=>1)},
7079                                                 "blame") .
7080                                         " | ";
7081                         }
7082                         $formats_nav .=
7083                                 $cgi->a({-href => href(action=>"history", -replay=>1)},
7084                                         "history") .
7085                                 " | " .
7086                                 $cgi->a({-href => href(action=>"blob_plain", -replay=>1)},
7087                                         "raw") .
7088                                 " | " .
7089                                 $cgi->a({-href => href(action=>"blob",
7090                                                        hash_base=>"HEAD", file_name=>$file_name)},
7091                                         "HEAD");
7092                 } else {
7093                         $formats_nav .=
7094                                 $cgi->a({-href => href(action=>"blob_plain", -replay=>1)},
7095                                         "raw");
7096                 }
7097                 git_print_page_nav('','', $hash_base,$co{'tree'},$hash_base, $formats_nav);
7098                 git_print_header_div('commit', esc_html($co{'title'}), $hash_base);
7099         } else {
7100                 print "<div class=\"page_nav\">\n" .
7101                       "<br/><br/></div>\n" .
7102                       "<div class=\"title\">".esc_html($hash)."</div>\n";
7103         }
7104         git_print_page_path($file_name, "blob", $hash_base);
7105         print "<div class=\"page_body\">\n";
7106         if ($mimetype =~ m!^image/!) {
7107                 print qq!<img class="blob" type="!.esc_attr($mimetype).qq!"!;
7108                 if ($file_name) {
7109                         print qq! alt="!.esc_attr($file_name).qq!" title="!.esc_attr($file_name).qq!"!;
7110                 }
7111                 print qq! src="! .
7112                       href(action=>"blob_plain", hash=>$hash,
7113                            hash_base=>$hash_base, file_name=>$file_name) .
7114                       qq!" />\n!;
7115         } else {
7116                 my $nr;
7117                 while (my $line = <$fd>) {
7118                         chomp $line;
7119                         $nr++;
7120                         $line = untabify($line);
7121                         printf qq!<div class="pre"><a id="l%i" href="%s#l%i" class="linenr">%4i</a> %s</div>\n!,
7122                                $nr, esc_attr(href(-replay => 1)), $nr, $nr,
7123                                ($highlight) ? sanitize($line) : esc_html($line, -nbsp=>1);
7124                 }
7125         }
7126         close $fd
7127                 or print "Reading blob failed.\n";
7128         print "</div>";
7129         git_footer_html();
7130 }
7131
7132 sub git_tree {
7133         if (!defined $hash_base) {
7134                 $hash_base = "HEAD";
7135         }
7136         if (!defined $hash) {
7137                 if (defined $file_name) {
7138                         $hash = git_get_hash_by_path($hash_base, $file_name, "tree");
7139                 } else {
7140                         $hash = $hash_base;
7141                 }
7142         }
7143         die_error(404, "No such tree") unless defined($hash);
7144
7145         my $show_sizes = gitweb_check_feature('show-sizes');
7146         my $have_blame = gitweb_check_feature('blame');
7147
7148         my @entries = ();
7149         {
7150                 local $/ = "\0";
7151                 open my $fd, "-|", git_cmd(), "ls-tree", '-z',
7152                         ($show_sizes ? '-l' : ()), @extra_options, $hash
7153                         or die_error(500, "Open git-ls-tree failed");
7154                 @entries = map { chomp; $_ } <$fd>;
7155                 close $fd
7156                         or die_error(404, "Reading tree failed");
7157         }
7158
7159         my $refs = git_get_references();
7160         my $ref = format_ref_marker($refs, $hash_base);
7161         git_header_html();
7162         my $basedir = '';
7163         if (defined $hash_base && (my %co = parse_commit($hash_base))) {
7164                 my @views_nav = ();
7165                 if (defined $file_name) {
7166                         push @views_nav,
7167                                 $cgi->a({-href => href(action=>"history", -replay=>1)},
7168                                         "history"),
7169                                 $cgi->a({-href => href(action=>"tree",
7170                                                        hash_base=>"HEAD", file_name=>$file_name)},
7171                                         "HEAD"),
7172                 }
7173                 my $snapshot_links = format_snapshot_links($hash);
7174                 if (defined $snapshot_links) {
7175                         # FIXME: Should be available when we have no hash base as well.
7176                         push @views_nav, $snapshot_links;
7177                 }
7178                 git_print_page_nav('tree','', $hash_base, undef, undef,
7179                                    join(' | ', @views_nav));
7180                 git_print_header_div('commit', esc_html($co{'title'}) . $ref, $hash_base);
7181         } else {
7182                 undef $hash_base;
7183                 print "<div class=\"page_nav\">\n";
7184                 print "<br/><br/></div>\n";
7185                 print "<div class=\"title\">".esc_html($hash)."</div>\n";
7186         }
7187         if (defined $file_name) {
7188                 $basedir = $file_name;
7189                 if ($basedir ne '' && substr($basedir, -1) ne '/') {
7190                         $basedir .= '/';
7191                 }
7192                 git_print_page_path($file_name, 'tree', $hash_base);
7193         }
7194         print "<div class=\"page_body\">\n";
7195         print "<table class=\"tree\">\n";
7196         my $alternate = 1;
7197         # '..' (top directory) link if possible
7198         if (defined $hash_base &&
7199             defined $file_name && $file_name =~ m![^/]+$!) {
7200                 if ($alternate) {
7201                         print "<tr class=\"dark\">\n";
7202                 } else {
7203                         print "<tr class=\"light\">\n";
7204                 }
7205                 $alternate ^= 1;
7206
7207                 my $up = $file_name;
7208                 $up =~ s!/?[^/]+$!!;
7209                 undef $up unless $up;
7210                 # based on git_print_tree_entry
7211                 print '<td class="mode">' . mode_str('040000') . "</td>\n";
7212                 print '<td class="size">&nbsp;</td>'."\n" if $show_sizes;
7213                 print '<td class="list">';
7214                 print $cgi->a({-href => href(action=>"tree",
7215                                              hash_base=>$hash_base,
7216                                              file_name=>$up)},
7217                               "..");
7218                 print "</td>\n";
7219                 print "<td class=\"link\"></td>\n";
7220
7221                 print "</tr>\n";
7222         }
7223         foreach my $line (@entries) {
7224                 my %t = parse_ls_tree_line($line, -z => 1, -l => $show_sizes);
7225
7226                 if ($alternate) {
7227                         print "<tr class=\"dark\">\n";
7228                 } else {
7229                         print "<tr class=\"light\">\n";
7230                 }
7231                 $alternate ^= 1;
7232
7233                 git_print_tree_entry(\%t, $basedir, $hash_base, $have_blame);
7234
7235                 print "</tr>\n";
7236         }
7237         print "</table>\n" .
7238               "</div>";
7239         git_footer_html();
7240 }
7241
7242 sub sanitize_for_filename {
7243     my $name = shift;
7244
7245     $name =~ s!/!-!g;
7246     $name =~ s/[^[:alnum:]_.-]//g;
7247
7248     return $name;
7249 }
7250
7251 sub snapshot_name {
7252         my ($project, $hash) = @_;
7253
7254         # path/to/project.git  -> project
7255         # path/to/project/.git -> project
7256         my $name = to_utf8($project);
7257         $name =~ s,([^/])/*\.git$,$1,;
7258         $name = sanitize_for_filename(basename($name));
7259
7260         my $ver = $hash;
7261         if ($hash =~ /^[0-9a-fA-F]+$/) {
7262                 # shorten SHA-1 hash
7263                 my $full_hash = git_get_full_hash($project, $hash);
7264                 if ($full_hash =~ /^$hash/ && length($hash) > 7) {
7265                         $ver = git_get_short_hash($project, $hash);
7266                 }
7267         } elsif ($hash =~ m!^refs/tags/(.*)$!) {
7268                 # tags don't need shortened SHA-1 hash
7269                 $ver = $1;
7270         } else {
7271                 # branches and other need shortened SHA-1 hash
7272                 my $strip_refs = join '|', map { quotemeta } get_branch_refs();
7273                 if ($hash =~ m!^refs/($strip_refs|remotes)/(.*)$!) {
7274                         my $ref_dir = (defined $1) ? $1 : '';
7275                         $ver = $2;
7276
7277                         $ref_dir = sanitize_for_filename($ref_dir);
7278                         # for refs neither in heads nor remotes we want to
7279                         # add a ref dir to archive name
7280                         if ($ref_dir ne '' and $ref_dir ne 'heads' and $ref_dir ne 'remotes') {
7281                                 $ver = $ref_dir . '-' . $ver;
7282                         }
7283                 }
7284                 $ver .= '-' . git_get_short_hash($project, $hash);
7285         }
7286         # special case of sanitization for filename - we change
7287         # slashes to dots instead of dashes
7288         # in case of hierarchical branch names
7289         $ver =~ s!/!.!g;
7290         $ver =~ s/[^[:alnum:]_.-]//g;
7291
7292         # name = project-version_string
7293         $name = "$name-$ver";
7294
7295         return wantarray ? ($name, $name) : $name;
7296 }
7297
7298 sub exit_if_unmodified_since {
7299         my ($latest_epoch) = @_;
7300         our $cgi;
7301
7302         my $if_modified = $cgi->http('IF_MODIFIED_SINCE');
7303         if (defined $if_modified) {
7304                 my $since;
7305                 if (eval { require HTTP::Date; 1; }) {
7306                         $since = HTTP::Date::str2time($if_modified);
7307                 } elsif (eval { require Time::ParseDate; 1; }) {
7308                         $since = Time::ParseDate::parsedate($if_modified, GMT => 1);
7309                 }
7310                 if (defined $since && $latest_epoch <= $since) {
7311                         my %latest_date = parse_date($latest_epoch);
7312                         print $cgi->header(
7313                                 -last_modified => $latest_date{'rfc2822'},
7314                                 -status => '304 Not Modified');
7315                         goto DONE_GITWEB;
7316                 }
7317         }
7318 }
7319
7320 sub git_snapshot {
7321         my $format = $input_params{'snapshot_format'};
7322         if (!@snapshot_fmts) {
7323                 die_error(403, "Snapshots not allowed");
7324         }
7325         # default to first supported snapshot format
7326         $format ||= $snapshot_fmts[0];
7327         if ($format !~ m/^[a-z0-9]+$/) {
7328                 die_error(400, "Invalid snapshot format parameter");
7329         } elsif (!exists($known_snapshot_formats{$format})) {
7330                 die_error(400, "Unknown snapshot format");
7331         } elsif ($known_snapshot_formats{$format}{'disabled'}) {
7332                 die_error(403, "Snapshot format not allowed");
7333         } elsif (!grep($_ eq $format, @snapshot_fmts)) {
7334                 die_error(403, "Unsupported snapshot format");
7335         }
7336
7337         my $type = git_get_type("$hash^{}");
7338         if (!$type) {
7339                 die_error(404, 'Object does not exist');
7340         }  elsif ($type eq 'blob') {
7341                 die_error(400, 'Object is not a tree-ish');
7342         }
7343
7344         my ($name, $prefix) = snapshot_name($project, $hash);
7345         my $filename = "$name$known_snapshot_formats{$format}{'suffix'}";
7346
7347         my %co = parse_commit($hash);
7348         exit_if_unmodified_since($co{'committer_epoch'}) if %co;
7349
7350         my $cmd = quote_command(
7351                 git_cmd(), 'archive',
7352                 "--format=$known_snapshot_formats{$format}{'format'}",
7353                 "--prefix=$prefix/", $hash);
7354         if (exists $known_snapshot_formats{$format}{'compressor'}) {
7355                 $cmd .= ' | ' . quote_command(@{$known_snapshot_formats{$format}{'compressor'}});
7356         }
7357
7358         $filename =~ s/(["\\])/\\$1/g;
7359         my %latest_date;
7360         if (%co) {
7361                 %latest_date = parse_date($co{'committer_epoch'}, $co{'committer_tz'});
7362         }
7363
7364         print $cgi->header(
7365                 -type => $known_snapshot_formats{$format}{'type'},
7366                 -content_disposition => 'inline; filename="' . $filename . '"',
7367                 %co ? (-last_modified => $latest_date{'rfc2822'}) : (),
7368                 -status => '200 OK');
7369
7370         open my $fd, "-|", $cmd
7371                 or die_error(500, "Execute git-archive failed");
7372         binmode STDOUT, ':raw';
7373         print <$fd>;
7374         binmode STDOUT, ':utf8'; # as set at the beginning of gitweb.cgi
7375         close $fd;
7376 }
7377
7378 sub git_log_generic {
7379         my ($fmt_name, $body_subr, $base, $parent, $file_name, $file_hash) = @_;
7380
7381         my $head = git_get_head_hash($project);
7382         if (!defined $base) {
7383                 $base = $head;
7384         }
7385         if (!defined $page) {
7386                 $page = 0;
7387         }
7388         my $refs = git_get_references();
7389
7390         my $commit_hash = $base;
7391         if (defined $parent) {
7392                 $commit_hash = "$parent..$base";
7393         }
7394         my @commitlist =
7395                 parse_commits($commit_hash, 101, (100 * $page),
7396                               defined $file_name ? ($file_name, "--full-history") : ());
7397
7398         my $ftype;
7399         if (!defined $file_hash && defined $file_name) {
7400                 # some commits could have deleted file in question,
7401                 # and not have it in tree, but one of them has to have it
7402                 for (my $i = 0; $i < @commitlist; $i++) {
7403                         $file_hash = git_get_hash_by_path($commitlist[$i]{'id'}, $file_name);
7404                         last if defined $file_hash;
7405                 }
7406         }
7407         if (defined $file_hash) {
7408                 $ftype = git_get_type($file_hash);
7409         }
7410         if (defined $file_name && !defined $ftype) {
7411                 die_error(500, "Unknown type of object");
7412         }
7413         my %co;
7414         if (defined $file_name) {
7415                 %co = parse_commit($base)
7416                         or die_error(404, "Unknown commit object");
7417         }
7418
7419
7420         my $paging_nav = format_paging_nav($fmt_name, $page, $#commitlist >= 100);
7421         my $next_link = '';
7422         if ($#commitlist >= 100) {
7423                 $next_link =
7424                         $cgi->a({-href => href(-replay=>1, page=>$page+1),
7425                                  -accesskey => "n", -title => "Alt-n"}, "next");
7426         }
7427         my $patch_max = gitweb_get_feature('patches');
7428         if ($patch_max && !defined $file_name) {
7429                 if ($patch_max < 0 || @commitlist <= $patch_max) {
7430                         $paging_nav .= " &sdot; " .
7431                                 $cgi->a({-href => href(action=>"patches", -replay=>1)},
7432                                         "patches");
7433                 }
7434         }
7435
7436         git_header_html();
7437         git_print_page_nav($fmt_name,'', $hash,$hash,$hash, $paging_nav);
7438         if (defined $file_name) {
7439                 git_print_header_div('commit', esc_html($co{'title'}), $base);
7440         } else {
7441                 git_print_header_div('summary', $project)
7442         }
7443         git_print_page_path($file_name, $ftype, $hash_base)
7444                 if (defined $file_name);
7445
7446         $body_subr->(\@commitlist, 0, 99, $refs, $next_link,
7447                      $file_name, $file_hash, $ftype);
7448
7449         git_footer_html();
7450 }
7451
7452 sub git_log {
7453         git_log_generic('log', \&git_log_body,
7454                         $hash, $hash_parent);
7455 }
7456
7457 sub git_commit {
7458         $hash ||= $hash_base || "HEAD";
7459         my %co = parse_commit($hash)
7460             or die_error(404, "Unknown commit object");
7461
7462         my $parent  = $co{'parent'};
7463         my $parents = $co{'parents'}; # listref
7464
7465         # we need to prepare $formats_nav before any parameter munging
7466         my $formats_nav;
7467         if (!defined $parent) {
7468                 # --root commitdiff
7469                 $formats_nav .= '(initial)';
7470         } elsif (@$parents == 1) {
7471                 # single parent commit
7472                 $formats_nav .=
7473                         '(parent: ' .
7474                         $cgi->a({-href => href(action=>"commit",
7475                                                hash=>$parent)},
7476                                 esc_html(substr($parent, 0, 7))) .
7477                         ')';
7478         } else {
7479                 # merge commit
7480                 $formats_nav .=
7481                         '(merge: ' .
7482                         join(' ', map {
7483                                 $cgi->a({-href => href(action=>"commit",
7484                                                        hash=>$_)},
7485                                         esc_html(substr($_, 0, 7)));
7486                         } @$parents ) .
7487                         ')';
7488         }
7489         if (gitweb_check_feature('patches') && @$parents <= 1) {
7490                 $formats_nav .= " | " .
7491                         $cgi->a({-href => href(action=>"patch", -replay=>1)},
7492                                 "patch");
7493         }
7494
7495         if (!defined $parent) {
7496                 $parent = "--root";
7497         }
7498         my @difftree;
7499         open my $fd, "-|", git_cmd(), "diff-tree", '-r', "--no-commit-id",
7500                 @diff_opts,
7501                 (@$parents <= 1 ? $parent : '-c'),
7502                 $hash, "--"
7503                 or die_error(500, "Open git-diff-tree failed");
7504         @difftree = map { chomp; $_ } <$fd>;
7505         close $fd or die_error(404, "Reading git-diff-tree failed");
7506
7507         # non-textual hash id's can be cached
7508         my $expires;
7509         if ($hash =~ m/^[0-9a-fA-F]{40}$/) {
7510                 $expires = "+1d";
7511         }
7512         my $refs = git_get_references();
7513         my $ref = format_ref_marker($refs, $co{'id'});
7514
7515         git_header_html(undef, $expires);
7516         git_print_page_nav('commit', '',
7517                            $hash, $co{'tree'}, $hash,
7518                            $formats_nav);
7519
7520         if (defined $co{'parent'}) {
7521                 git_print_header_div('commitdiff', esc_html($co{'title'}) . $ref, $hash);
7522         } else {
7523                 git_print_header_div('tree', esc_html($co{'title'}) . $ref, $co{'tree'}, $hash);
7524         }
7525         print "<div class=\"title_text\">\n" .
7526               "<table class=\"object_header\">\n";
7527         git_print_authorship_rows(\%co);
7528         print "<tr><td>commit</td><td class=\"sha1\">$co{'id'}</td></tr>\n";
7529         print "<tr>" .
7530               "<td>tree</td>" .
7531               "<td class=\"sha1\">" .
7532               $cgi->a({-href => href(action=>"tree", hash=>$co{'tree'}, hash_base=>$hash),
7533                        class => "list"}, $co{'tree'}) .
7534               "</td>" .
7535               "<td class=\"link\">" .
7536               $cgi->a({-href => href(action=>"tree", hash=>$co{'tree'}, hash_base=>$hash)},
7537                       "tree");
7538         my $snapshot_links = format_snapshot_links($hash);
7539         if (defined $snapshot_links) {
7540                 print " | " . $snapshot_links;
7541         }
7542         print "</td>" .
7543               "</tr>\n";
7544
7545         foreach my $par (@$parents) {
7546                 print "<tr>" .
7547                       "<td>parent</td>" .
7548                       "<td class=\"sha1\">" .
7549                       $cgi->a({-href => href(action=>"commit", hash=>$par),
7550                                class => "list"}, $par) .
7551                       "</td>" .
7552                       "<td class=\"link\">" .
7553                       $cgi->a({-href => href(action=>"commit", hash=>$par)}, "commit") .
7554                       " | " .
7555                       $cgi->a({-href => href(action=>"commitdiff", hash=>$hash, hash_parent=>$par)}, "diff") .
7556                       "</td>" .
7557                       "</tr>\n";
7558         }
7559         print "</table>".
7560               "</div>\n";
7561
7562         print "<div class=\"page_body\">\n";
7563         git_print_log($co{'comment'});
7564         print "</div>\n";
7565
7566         git_difftree_body(\@difftree, $hash, @$parents);
7567
7568         git_footer_html();
7569 }
7570
7571 sub git_object {
7572         # object is defined by:
7573         # - hash or hash_base alone
7574         # - hash_base and file_name
7575         my $type;
7576
7577         # - hash or hash_base alone
7578         if ($hash || ($hash_base && !defined $file_name)) {
7579                 my $object_id = $hash || $hash_base;
7580
7581                 open my $fd, "-|", quote_command(
7582                         git_cmd(), 'cat-file', '-t', $object_id) . ' 2> /dev/null'
7583                         or die_error(404, "Object does not exist");
7584                 $type = <$fd>;
7585                 defined $type && chomp $type;
7586                 close $fd
7587                         or die_error(404, "Object does not exist");
7588
7589         # - hash_base and file_name
7590         } elsif ($hash_base && defined $file_name) {
7591                 $file_name =~ s,/+$,,;
7592
7593                 system(git_cmd(), "cat-file", '-e', $hash_base) == 0
7594                         or die_error(404, "Base object does not exist");
7595
7596                 # here errors should not happen
7597                 open my $fd, "-|", git_cmd(), "ls-tree", $hash_base, "--", $file_name
7598                         or die_error(500, "Open git-ls-tree failed");
7599                 my $line = <$fd>;
7600                 close $fd;
7601
7602                 #'100644 blob 0fa3f3a66fb6a137f6ec2c19351ed4d807070ffa  panic.c'
7603                 unless ($line && $line =~ m/^([0-9]+) (.+) ([0-9a-fA-F]{40})\t/) {
7604                         die_error(404, "File or directory for given base does not exist");
7605                 }
7606                 $type = $2;
7607                 $hash = $3;
7608         } else {
7609                 die_error(400, "Not enough information to find object");
7610         }
7611
7612         print $cgi->redirect(-uri => href(action=>$type, -full=>1,
7613                                           hash=>$hash, hash_base=>$hash_base,
7614                                           file_name=>$file_name),
7615                              -status => '302 Found');
7616 }
7617
7618 sub git_blobdiff {
7619         my $format = shift || 'html';
7620         my $diff_style = $input_params{'diff_style'} || 'inline';
7621
7622         my $fd;
7623         my @difftree;
7624         my %diffinfo;
7625         my $expires;
7626
7627         # preparing $fd and %diffinfo for git_patchset_body
7628         # new style URI
7629         if (defined $hash_base && defined $hash_parent_base) {
7630                 if (defined $file_name) {
7631                         # read raw output
7632                         open $fd, "-|", git_cmd(), "diff-tree", '-r', @diff_opts,
7633                                 $hash_parent_base, $hash_base,
7634                                 "--", (defined $file_parent ? $file_parent : ()), $file_name
7635                                 or die_error(500, "Open git-diff-tree failed");
7636                         @difftree = map { chomp; $_ } <$fd>;
7637                         close $fd
7638                                 or die_error(404, "Reading git-diff-tree failed");
7639                         @difftree
7640                                 or die_error(404, "Blob diff not found");
7641
7642                 } elsif (defined $hash &&
7643                          $hash =~ /[0-9a-fA-F]{40}/) {
7644                         # try to find filename from $hash
7645
7646                         # read filtered raw output
7647                         open $fd, "-|", git_cmd(), "diff-tree", '-r', @diff_opts,
7648                                 $hash_parent_base, $hash_base, "--"
7649                                 or die_error(500, "Open git-diff-tree failed");
7650                         @difftree =
7651                                 # ':100644 100644 03b21826... 3b93d5e7... M     ls-files.c'
7652                                 # $hash == to_id
7653                                 grep { /^:[0-7]{6} [0-7]{6} [0-9a-fA-F]{40} $hash/ }
7654                                 map { chomp; $_ } <$fd>;
7655                         close $fd
7656                                 or die_error(404, "Reading git-diff-tree failed");
7657                         @difftree
7658                                 or die_error(404, "Blob diff not found");
7659
7660                 } else {
7661                         die_error(400, "Missing one of the blob diff parameters");
7662                 }
7663
7664                 if (@difftree > 1) {
7665                         die_error(400, "Ambiguous blob diff specification");
7666                 }
7667
7668                 %diffinfo = parse_difftree_raw_line($difftree[0]);
7669                 $file_parent ||= $diffinfo{'from_file'} || $file_name;
7670                 $file_name   ||= $diffinfo{'to_file'};
7671
7672                 $hash_parent ||= $diffinfo{'from_id'};
7673                 $hash        ||= $diffinfo{'to_id'};
7674
7675                 # non-textual hash id's can be cached
7676                 if ($hash_base =~ m/^[0-9a-fA-F]{40}$/ &&
7677                     $hash_parent_base =~ m/^[0-9a-fA-F]{40}$/) {
7678                         $expires = '+1d';
7679                 }
7680
7681                 # open patch output
7682                 open $fd, "-|", git_cmd(), "diff-tree", '-r', @diff_opts,
7683                         '-p', ($format eq 'html' ? "--full-index" : ()),
7684                         $hash_parent_base, $hash_base,
7685                         "--", (defined $file_parent ? $file_parent : ()), $file_name
7686                         or die_error(500, "Open git-diff-tree failed");
7687         }
7688
7689         # old/legacy style URI -- not generated anymore since 1.4.3.
7690         if (!%diffinfo) {
7691                 die_error('404 Not Found', "Missing one of the blob diff parameters")
7692         }
7693
7694         # header
7695         if ($format eq 'html') {
7696                 my $formats_nav =
7697                         $cgi->a({-href => href(action=>"blobdiff_plain", -replay=>1)},
7698                                 "raw");
7699                 $formats_nav .= diff_style_nav($diff_style);
7700                 git_header_html(undef, $expires);
7701                 if (defined $hash_base && (my %co = parse_commit($hash_base))) {
7702                         git_print_page_nav('','', $hash_base,$co{'tree'},$hash_base, $formats_nav);
7703                         git_print_header_div('commit', esc_html($co{'title'}), $hash_base);
7704                 } else {
7705                         print "<div class=\"page_nav\"><br/>$formats_nav<br/></div>\n";
7706                         print "<div class=\"title\">".esc_html("$hash vs $hash_parent")."</div>\n";
7707                 }
7708                 if (defined $file_name) {
7709                         git_print_page_path($file_name, "blob", $hash_base);
7710                 } else {
7711                         print "<div class=\"page_path\"></div>\n";
7712                 }
7713
7714         } elsif ($format eq 'plain') {
7715                 print $cgi->header(
7716                         -type => 'text/plain',
7717                         -charset => 'utf-8',
7718                         -expires => $expires,
7719                         -content_disposition => 'inline; filename="' . "$file_name" . '.patch"');
7720
7721                 print "X-Git-Url: " . $cgi->self_url() . "\n\n";
7722
7723         } else {
7724                 die_error(400, "Unknown blobdiff format");
7725         }
7726
7727         # patch
7728         if ($format eq 'html') {
7729                 print "<div class=\"page_body\">\n";
7730
7731                 git_patchset_body($fd, $diff_style,
7732                                   [ \%diffinfo ], $hash_base, $hash_parent_base);
7733                 close $fd;
7734
7735                 print "</div>\n"; # class="page_body"
7736                 git_footer_html();
7737
7738         } else {
7739                 while (my $line = <$fd>) {
7740                         $line =~ s!a/($hash|$hash_parent)!'a/'.esc_path($diffinfo{'from_file'})!eg;
7741                         $line =~ s!b/($hash|$hash_parent)!'b/'.esc_path($diffinfo{'to_file'})!eg;
7742
7743                         print $line;
7744
7745                         last if $line =~ m!^\+\+\+!;
7746                 }
7747                 local $/ = undef;
7748                 print <$fd>;
7749                 close $fd;
7750         }
7751 }
7752
7753 sub git_blobdiff_plain {
7754         git_blobdiff('plain');
7755 }
7756
7757 # assumes that it is added as later part of already existing navigation,
7758 # so it returns "| foo | bar" rather than just "foo | bar"
7759 sub diff_style_nav {
7760         my ($diff_style, $is_combined) = @_;
7761         $diff_style ||= 'inline';
7762
7763         return "" if ($is_combined);
7764
7765         my @styles = (inline => 'inline', 'sidebyside' => 'side by side');
7766         my %styles = @styles;
7767         @styles =
7768                 @styles[ map { $_ * 2 } 0..$#styles/2 ];
7769
7770         return join '',
7771                 map { " | ".$_ }
7772                 map {
7773                         $_ eq $diff_style ? $styles{$_} :
7774                         $cgi->a({-href => href(-replay=>1, diff_style => $_)}, $styles{$_})
7775                 } @styles;
7776 }
7777
7778 sub git_commitdiff {
7779         my %params = @_;
7780         my $format = $params{-format} || 'html';
7781         my $diff_style = $input_params{'diff_style'} || 'inline';
7782
7783         my ($patch_max) = gitweb_get_feature('patches');
7784         if ($format eq 'patch') {
7785                 die_error(403, "Patch view not allowed") unless $patch_max;
7786         }
7787
7788         $hash ||= $hash_base || "HEAD";
7789         my %co = parse_commit($hash)
7790             or die_error(404, "Unknown commit object");
7791
7792         # choose format for commitdiff for merge
7793         if (! defined $hash_parent && @{$co{'parents'}} > 1) {
7794                 $hash_parent = '--cc';
7795         }
7796         # we need to prepare $formats_nav before almost any parameter munging
7797         my $formats_nav;
7798         if ($format eq 'html') {
7799                 $formats_nav =
7800                         $cgi->a({-href => href(action=>"commitdiff_plain", -replay=>1)},
7801                                 "raw");
7802                 if ($patch_max && @{$co{'parents'}} <= 1) {
7803                         $formats_nav .= " | " .
7804                                 $cgi->a({-href => href(action=>"patch", -replay=>1)},
7805                                         "patch");
7806                 }
7807                 $formats_nav .= diff_style_nav($diff_style, @{$co{'parents'}} > 1);
7808
7809                 if (defined $hash_parent &&
7810                     $hash_parent ne '-c' && $hash_parent ne '--cc') {
7811                         # commitdiff with two commits given
7812                         my $hash_parent_short = $hash_parent;
7813                         if ($hash_parent =~ m/^[0-9a-fA-F]{40}$/) {
7814                                 $hash_parent_short = substr($hash_parent, 0, 7);
7815                         }
7816                         $formats_nav .=
7817                                 ' (from';
7818                         for (my $i = 0; $i < @{$co{'parents'}}; $i++) {
7819                                 if ($co{'parents'}[$i] eq $hash_parent) {
7820                                         $formats_nav .= ' parent ' . ($i+1);
7821                                         last;
7822                                 }
7823                         }
7824                         $formats_nav .= ': ' .
7825                                 $cgi->a({-href => href(-replay=>1,
7826                                                        hash=>$hash_parent, hash_base=>undef)},
7827                                         esc_html($hash_parent_short)) .
7828                                 ')';
7829                 } elsif (!$co{'parent'}) {
7830                         # --root commitdiff
7831                         $formats_nav .= ' (initial)';
7832                 } elsif (scalar @{$co{'parents'}} == 1) {
7833                         # single parent commit
7834                         $formats_nav .=
7835                                 ' (parent: ' .
7836                                 $cgi->a({-href => href(-replay=>1,
7837                                                        hash=>$co{'parent'}, hash_base=>undef)},
7838                                         esc_html(substr($co{'parent'}, 0, 7))) .
7839                                 ')';
7840                 } else {
7841                         # merge commit
7842                         if ($hash_parent eq '--cc') {
7843                                 $formats_nav .= ' | ' .
7844                                         $cgi->a({-href => href(-replay=>1,
7845                                                                hash=>$hash, hash_parent=>'-c')},
7846                                                 'combined');
7847                         } else { # $hash_parent eq '-c'
7848                                 $formats_nav .= ' | ' .
7849                                         $cgi->a({-href => href(-replay=>1,
7850                                                                hash=>$hash, hash_parent=>'--cc')},
7851                                                 'compact');
7852                         }
7853                         $formats_nav .=
7854                                 ' (merge: ' .
7855                                 join(' ', map {
7856                                         $cgi->a({-href => href(-replay=>1,
7857                                                                hash=>$_, hash_base=>undef)},
7858                                                 esc_html(substr($_, 0, 7)));
7859                                 } @{$co{'parents'}} ) .
7860                                 ')';
7861                 }
7862         }
7863
7864         my $hash_parent_param = $hash_parent;
7865         if (!defined $hash_parent_param) {
7866                 # --cc for multiple parents, --root for parentless
7867                 $hash_parent_param =
7868                         @{$co{'parents'}} > 1 ? '--cc' : $co{'parent'} || '--root';
7869         }
7870
7871         # read commitdiff
7872         my $fd;
7873         my @difftree;
7874         if ($format eq 'html') {
7875                 open $fd, "-|", git_cmd(), "diff-tree", '-r', @diff_opts,
7876                         "--no-commit-id", "--patch-with-raw", "--full-index",
7877                         $hash_parent_param, $hash, "--"
7878                         or die_error(500, "Open git-diff-tree failed");
7879
7880                 while (my $line = <$fd>) {
7881                         chomp $line;
7882                         # empty line ends raw part of diff-tree output
7883                         last unless $line;
7884                         push @difftree, scalar parse_difftree_raw_line($line);
7885                 }
7886
7887         } elsif ($format eq 'plain') {
7888                 open $fd, "-|", git_cmd(), "diff-tree", '-r', @diff_opts,
7889                         '-p', $hash_parent_param, $hash, "--"
7890                         or die_error(500, "Open git-diff-tree failed");
7891         } elsif ($format eq 'patch') {
7892                 # For commit ranges, we limit the output to the number of
7893                 # patches specified in the 'patches' feature.
7894                 # For single commits, we limit the output to a single patch,
7895                 # diverging from the git-format-patch default.
7896                 my @commit_spec = ();
7897                 if ($hash_parent) {
7898                         if ($patch_max > 0) {
7899                                 push @commit_spec, "-$patch_max";
7900                         }
7901                         push @commit_spec, '-n', "$hash_parent..$hash";
7902                 } else {
7903                         if ($params{-single}) {
7904                                 push @commit_spec, '-1';
7905                         } else {
7906                                 if ($patch_max > 0) {
7907                                         push @commit_spec, "-$patch_max";
7908                                 }
7909                                 push @commit_spec, "-n";
7910                         }
7911                         push @commit_spec, '--root', $hash;
7912                 }
7913                 open $fd, "-|", git_cmd(), "format-patch", @diff_opts,
7914                         '--encoding=utf8', '--stdout', @commit_spec
7915                         or die_error(500, "Open git-format-patch failed");
7916         } else {
7917                 die_error(400, "Unknown commitdiff format");
7918         }
7919
7920         # non-textual hash id's can be cached
7921         my $expires;
7922         if ($hash =~ m/^[0-9a-fA-F]{40}$/) {
7923                 $expires = "+1d";
7924         }
7925
7926         # write commit message
7927         if ($format eq 'html') {
7928                 my $refs = git_get_references();
7929                 my $ref = format_ref_marker($refs, $co{'id'});
7930
7931                 git_header_html(undef, $expires);
7932                 git_print_page_nav('commitdiff','', $hash,$co{'tree'},$hash, $formats_nav);
7933                 git_print_header_div('commit', esc_html($co{'title'}) . $ref, $hash);
7934                 print "<div class=\"title_text\">\n" .
7935                       "<table class=\"object_header\">\n";
7936                 git_print_authorship_rows(\%co);
7937                 print "</table>".
7938                       "</div>\n";
7939                 print "<div class=\"page_body\">\n";
7940                 if (@{$co{'comment'}} > 1) {
7941                         print "<div class=\"log\">\n";
7942                         git_print_log($co{'comment'}, -final_empty_line=> 1, -remove_title => 1);
7943                         print "</div>\n"; # class="log"
7944                 }
7945
7946         } elsif ($format eq 'plain') {
7947                 my $refs = git_get_references("tags");
7948                 my $tagname = git_get_rev_name_tags($hash);
7949                 my $filename = basename($project) . "-$hash.patch";
7950
7951                 print $cgi->header(
7952                         -type => 'text/plain',
7953                         -charset => 'utf-8',
7954                         -expires => $expires,
7955                         -content_disposition => 'inline; filename="' . "$filename" . '"');
7956                 my %ad = parse_date($co{'author_epoch'}, $co{'author_tz'});
7957                 print "From: " . to_utf8($co{'author'}) . "\n";
7958                 print "Date: $ad{'rfc2822'} ($ad{'tz_local'})\n";
7959                 print "Subject: " . to_utf8($co{'title'}) . "\n";
7960
7961                 print "X-Git-Tag: $tagname\n" if $tagname;
7962                 print "X-Git-Url: " . $cgi->self_url() . "\n\n";
7963
7964                 foreach my $line (@{$co{'comment'}}) {
7965                         print to_utf8($line) . "\n";
7966                 }
7967                 print "---\n\n";
7968         } elsif ($format eq 'patch') {
7969                 my $filename = basename($project) . "-$hash.patch";
7970
7971                 print $cgi->header(
7972                         -type => 'text/plain',
7973                         -charset => 'utf-8',
7974                         -expires => $expires,
7975                         -content_disposition => 'inline; filename="' . "$filename" . '"');
7976         }
7977
7978         # write patch
7979         if ($format eq 'html') {
7980                 my $use_parents = !defined $hash_parent ||
7981                         $hash_parent eq '-c' || $hash_parent eq '--cc';
7982                 git_difftree_body(\@difftree, $hash,
7983                                   $use_parents ? @{$co{'parents'}} : $hash_parent);
7984                 print "<br/>\n";
7985
7986                 git_patchset_body($fd, $diff_style,
7987                                   \@difftree, $hash,
7988                                   $use_parents ? @{$co{'parents'}} : $hash_parent);
7989                 close $fd;
7990                 print "</div>\n"; # class="page_body"
7991                 git_footer_html();
7992
7993         } elsif ($format eq 'plain') {
7994                 local $/ = undef;
7995                 print <$fd>;
7996                 close $fd
7997                         or print "Reading git-diff-tree failed\n";
7998         } elsif ($format eq 'patch') {
7999                 local $/ = undef;
8000                 print <$fd>;
8001                 close $fd
8002                         or print "Reading git-format-patch failed\n";
8003         }
8004 }
8005
8006 sub git_commitdiff_plain {
8007         git_commitdiff(-format => 'plain');
8008 }
8009
8010 # format-patch-style patches
8011 sub git_patch {
8012         git_commitdiff(-format => 'patch', -single => 1);
8013 }
8014
8015 sub git_patches {
8016         git_commitdiff(-format => 'patch');
8017 }
8018
8019 sub git_history {
8020         git_log_generic('history', \&git_history_body,
8021                         $hash_base, $hash_parent_base,
8022                         $file_name, $hash);
8023 }
8024
8025 sub git_search {
8026         $searchtype ||= 'commit';
8027
8028         # check if appropriate features are enabled
8029         gitweb_check_feature('search')
8030                 or die_error(403, "Search is disabled");
8031         if ($searchtype eq 'pickaxe') {
8032                 # pickaxe may take all resources of your box and run for several minutes
8033                 # with every query - so decide by yourself how public you make this feature
8034                 gitweb_check_feature('pickaxe')
8035                         or die_error(403, "Pickaxe search is disabled");
8036         }
8037         if ($searchtype eq 'grep') {
8038                 # grep search might be potentially CPU-intensive, too
8039                 gitweb_check_feature('grep')
8040                         or die_error(403, "Grep search is disabled");
8041         }
8042
8043         if (!defined $searchtext) {
8044                 die_error(400, "Text field is empty");
8045         }
8046         if (!defined $hash) {
8047                 $hash = git_get_head_hash($project);
8048         }
8049         my %co = parse_commit($hash);
8050         if (!%co) {
8051                 die_error(404, "Unknown commit object");
8052         }
8053         if (!defined $page) {
8054                 $page = 0;
8055         }
8056
8057         if ($searchtype eq 'commit' ||
8058             $searchtype eq 'author' ||
8059             $searchtype eq 'committer') {
8060                 git_search_message(%co);
8061         } elsif ($searchtype eq 'pickaxe') {
8062                 git_search_changes(%co);
8063         } elsif ($searchtype eq 'grep') {
8064                 git_search_files(%co);
8065         } else {
8066                 die_error(400, "Unknown search type");
8067         }
8068 }
8069
8070 sub git_search_help {
8071         git_header_html();
8072         git_print_page_nav('','', $hash,$hash,$hash);
8073         print <<EOT;
8074 <p><strong>Pattern</strong> is by default a normal string that is matched precisely (but without
8075 regard to case, except in the case of pickaxe). However, when you check the <em>re</em> checkbox,
8076 the pattern entered is recognized as the POSIX extended
8077 <a href="http://en.wikipedia.org/wiki/Regular_expression">regular expression</a> (also case
8078 insensitive).</p>
8079 <dl>
8080 <dt><b>commit</b></dt>
8081 <dd>The commit messages and authorship information will be scanned for the given pattern.</dd>
8082 EOT
8083         my $have_grep = gitweb_check_feature('grep');
8084         if ($have_grep) {
8085                 print <<EOT;
8086 <dt><b>grep</b></dt>
8087 <dd>All files in the currently selected tree (HEAD unless you are explicitly browsing
8088     a different one) are searched for the given pattern. On large trees, this search can take
8089 a while and put some strain on the server, so please use it with some consideration. Note that
8090 due to git-grep peculiarity, currently if regexp mode is turned off, the matches are
8091 case-sensitive.</dd>
8092 EOT
8093         }
8094         print <<EOT;
8095 <dt><b>author</b></dt>
8096 <dd>Name and e-mail of the change author and date of birth of the patch will be scanned for the given pattern.</dd>
8097 <dt><b>committer</b></dt>
8098 <dd>Name and e-mail of the committer and date of commit will be scanned for the given pattern.</dd>
8099 EOT
8100         my $have_pickaxe = gitweb_check_feature('pickaxe');
8101         if ($have_pickaxe) {
8102                 print <<EOT;
8103 <dt><b>pickaxe</b></dt>
8104 <dd>All commits that caused the string to appear or disappear from any file (changes that
8105 added, removed or "modified" the string) will be listed. This search can take a while and
8106 takes a lot of strain on the server, so please use it wisely. Note that since you may be
8107 interested even in changes just changing the case as well, this search is case sensitive.</dd>
8108 EOT
8109         }
8110         print "</dl>\n";
8111         git_footer_html();
8112 }
8113
8114 sub git_shortlog {
8115         git_log_generic('shortlog', \&git_shortlog_body,
8116                         $hash, $hash_parent);
8117 }
8118
8119 ## ......................................................................
8120 ## feeds (RSS, Atom; OPML)
8121
8122 sub git_feed {
8123         my $format = shift || 'atom';
8124         my $have_blame = gitweb_check_feature('blame');
8125
8126         # Atom: http://www.atomenabled.org/developers/syndication/
8127         # RSS:  http://www.notestips.com/80256B3A007F2692/1/NAMO5P9UPQ
8128         if ($format ne 'rss' && $format ne 'atom') {
8129                 die_error(400, "Unknown web feed format");
8130         }
8131
8132         # log/feed of current (HEAD) branch, log of given branch, history of file/directory
8133         my $head = $hash || 'HEAD';
8134         my @commitlist = parse_commits($head, 150, 0, $file_name);
8135
8136         my %latest_commit;
8137         my %latest_date;
8138         my $content_type = "application/$format+xml";
8139         if (defined $cgi->http('HTTP_ACCEPT') &&
8140                  $cgi->Accept('text/xml') > $cgi->Accept($content_type)) {
8141                 # browser (feed reader) prefers text/xml
8142                 $content_type = 'text/xml';
8143         }
8144         if (defined($commitlist[0])) {
8145                 %latest_commit = %{$commitlist[0]};
8146                 my $latest_epoch = $latest_commit{'committer_epoch'};
8147                 exit_if_unmodified_since($latest_epoch);
8148                 %latest_date = parse_date($latest_epoch, $latest_commit{'committer_tz'});
8149         }
8150         print $cgi->header(
8151                 -type => $content_type,
8152                 -charset => 'utf-8',
8153                 %latest_date ? (-last_modified => $latest_date{'rfc2822'}) : (),
8154                 -status => '200 OK');
8155
8156         # Optimization: skip generating the body if client asks only
8157         # for Last-Modified date.
8158         return if ($cgi->request_method() eq 'HEAD');
8159
8160         # header variables
8161         my $title = "$site_name - $project/$action";
8162         my $feed_type = 'log';
8163         if (defined $hash) {
8164                 $title .= " - '$hash'";
8165                 $feed_type = 'branch log';
8166                 if (defined $file_name) {
8167                         $title .= " :: $file_name";
8168                         $feed_type = 'history';
8169                 }
8170         } elsif (defined $file_name) {
8171                 $title .= " - $file_name";
8172                 $feed_type = 'history';
8173         }
8174         $title .= " $feed_type";
8175         $title = esc_html($title);
8176         my $descr = git_get_project_description($project);
8177         if (defined $descr) {
8178                 $descr = esc_html($descr);
8179         } else {
8180                 $descr = "$project " .
8181                          ($format eq 'rss' ? 'RSS' : 'Atom') .
8182                          " feed";
8183         }
8184         my $owner = git_get_project_owner($project);
8185         $owner = esc_html($owner);
8186
8187         #header
8188         my $alt_url;
8189         if (defined $file_name) {
8190                 $alt_url = href(-full=>1, action=>"history", hash=>$hash, file_name=>$file_name);
8191         } elsif (defined $hash) {
8192                 $alt_url = href(-full=>1, action=>"log", hash=>$hash);
8193         } else {
8194                 $alt_url = href(-full=>1, action=>"summary");
8195         }
8196         print qq!<?xml version="1.0" encoding="utf-8"?>\n!;
8197         if ($format eq 'rss') {
8198                 print <<XML;
8199 <rss version="2.0" xmlns:content="http://purl.org/rss/1.0/modules/content/">
8200 <channel>
8201 XML
8202                 print "<title>$title</title>\n" .
8203                       "<link>$alt_url</link>\n" .
8204                       "<description>$descr</description>\n" .
8205                       "<language>en</language>\n" .
8206                       # project owner is responsible for 'editorial' content
8207                       "<managingEditor>$owner</managingEditor>\n";
8208                 if (defined $logo || defined $favicon) {
8209                         # prefer the logo to the favicon, since RSS
8210                         # doesn't allow both
8211                         my $img = esc_url($logo || $favicon);
8212                         print "<image>\n" .
8213                               "<url>$img</url>\n" .
8214                               "<title>$title</title>\n" .
8215                               "<link>$alt_url</link>\n" .
8216                               "</image>\n";
8217                 }
8218                 if (%latest_date) {
8219                         print "<pubDate>$latest_date{'rfc2822'}</pubDate>\n";
8220                         print "<lastBuildDate>$latest_date{'rfc2822'}</lastBuildDate>\n";
8221                 }
8222                 print "<generator>gitweb v.$version/$git_version</generator>\n";
8223         } elsif ($format eq 'atom') {
8224                 print <<XML;
8225 <feed xmlns="http://www.w3.org/2005/Atom">
8226 XML
8227                 print "<title>$title</title>\n" .
8228                       "<subtitle>$descr</subtitle>\n" .
8229                       '<link rel="alternate" type="text/html" href="' .
8230                       $alt_url . '" />' . "\n" .
8231                       '<link rel="self" type="' . $content_type . '" href="' .
8232                       $cgi->self_url() . '" />' . "\n" .
8233                       "<id>" . href(-full=>1) . "</id>\n" .
8234                       # use project owner for feed author
8235                       "<author><name>$owner</name></author>\n";
8236                 if (defined $favicon) {
8237                         print "<icon>" . esc_url($favicon) . "</icon>\n";
8238                 }
8239                 if (defined $logo) {
8240                         # not twice as wide as tall: 72 x 27 pixels
8241                         print "<logo>" . esc_url($logo) . "</logo>\n";
8242                 }
8243                 if (! %latest_date) {
8244                         # dummy date to keep the feed valid until commits trickle in:
8245                         print "<updated>1970-01-01T00:00:00Z</updated>\n";
8246                 } else {
8247                         print "<updated>$latest_date{'iso-8601'}</updated>\n";
8248                 }
8249                 print "<generator version='$version/$git_version'>gitweb</generator>\n";
8250         }
8251
8252         # contents
8253         for (my $i = 0; $i <= $#commitlist; $i++) {
8254                 my %co = %{$commitlist[$i]};
8255                 my $commit = $co{'id'};
8256                 # we read 150, we always show 30 and the ones more recent than 48 hours
8257                 if (($i >= 20) && ((time - $co{'author_epoch'}) > 48*60*60)) {
8258                         last;
8259                 }
8260                 my %cd = parse_date($co{'author_epoch'}, $co{'author_tz'});
8261
8262                 # get list of changed files
8263                 open my $fd, "-|", git_cmd(), "diff-tree", '-r', @diff_opts,
8264                         $co{'parent'} || "--root",
8265                         $co{'id'}, "--", (defined $file_name ? $file_name : ())
8266                         or next;
8267                 my @difftree = map { chomp; $_ } <$fd>;
8268                 close $fd
8269                         or next;
8270
8271                 # print element (entry, item)
8272                 my $co_url = href(-full=>1, action=>"commitdiff", hash=>$commit);
8273                 if ($format eq 'rss') {
8274                         print "<item>\n" .
8275                               "<title>" . esc_html($co{'title'}) . "</title>\n" .
8276                               "<author>" . esc_html($co{'author'}) . "</author>\n" .
8277                               "<pubDate>$cd{'rfc2822'}</pubDate>\n" .
8278                               "<guid isPermaLink=\"true\">$co_url</guid>\n" .
8279                               "<link>$co_url</link>\n" .
8280                               "<description>" . esc_html($co{'title'}) . "</description>\n" .
8281                               "<content:encoded>" .
8282                               "<![CDATA[\n";
8283                 } elsif ($format eq 'atom') {
8284                         print "<entry>\n" .
8285                               "<title type=\"html\">" . esc_html($co{'title'}) . "</title>\n" .
8286                               "<updated>$cd{'iso-8601'}</updated>\n" .
8287                               "<author>\n" .
8288                               "  <name>" . esc_html($co{'author_name'}) . "</name>\n";
8289                         if ($co{'author_email'}) {
8290                                 print "  <email>" . esc_html($co{'author_email'}) . "</email>\n";
8291                         }
8292                         print "</author>\n" .
8293                               # use committer for contributor
8294                               "<contributor>\n" .
8295                               "  <name>" . esc_html($co{'committer_name'}) . "</name>\n";
8296                         if ($co{'committer_email'}) {
8297                                 print "  <email>" . esc_html($co{'committer_email'}) . "</email>\n";
8298                         }
8299                         print "</contributor>\n" .
8300                               "<published>$cd{'iso-8601'}</published>\n" .
8301                               "<link rel=\"alternate\" type=\"text/html\" href=\"$co_url\" />\n" .
8302                               "<id>$co_url</id>\n" .
8303                               "<content type=\"xhtml\" xml:base=\"" . esc_url($my_url) . "\">\n" .
8304                               "<div xmlns=\"http://www.w3.org/1999/xhtml\">\n";
8305                 }
8306                 my $comment = $co{'comment'};
8307                 print "<pre>\n";
8308                 foreach my $line (@$comment) {
8309                         $line = esc_html($line);
8310                         print "$line\n";
8311                 }
8312                 print "</pre><ul>\n";
8313                 foreach my $difftree_line (@difftree) {
8314                         my %difftree = parse_difftree_raw_line($difftree_line);
8315                         next if !$difftree{'from_id'};
8316
8317                         my $file = $difftree{'file'} || $difftree{'to_file'};
8318
8319                         print "<li>" .
8320                               "[" .
8321                               $cgi->a({-href => href(-full=>1, action=>"blobdiff",
8322                                                      hash=>$difftree{'to_id'}, hash_parent=>$difftree{'from_id'},
8323                                                      hash_base=>$co{'id'}, hash_parent_base=>$co{'parent'},
8324                                                      file_name=>$file, file_parent=>$difftree{'from_file'}),
8325                                       -title => "diff"}, 'D');
8326                         if ($have_blame) {
8327                                 print $cgi->a({-href => href(-full=>1, action=>"blame",
8328                                                              file_name=>$file, hash_base=>$commit),
8329                                               -title => "blame"}, 'B');
8330                         }
8331                         # if this is not a feed of a file history
8332                         if (!defined $file_name || $file_name ne $file) {
8333                                 print $cgi->a({-href => href(-full=>1, action=>"history",
8334                                                              file_name=>$file, hash=>$commit),
8335                                               -title => "history"}, 'H');
8336                         }
8337                         $file = esc_path($file);
8338                         print "] ".
8339                               "$file</li>\n";
8340                 }
8341                 if ($format eq 'rss') {
8342                         print "</ul>]]>\n" .
8343                               "</content:encoded>\n" .
8344                               "</item>\n";
8345                 } elsif ($format eq 'atom') {
8346                         print "</ul>\n</div>\n" .
8347                               "</content>\n" .
8348                               "</entry>\n";
8349                 }
8350         }
8351
8352         # end of feed
8353         if ($format eq 'rss') {
8354                 print "</channel>\n</rss>\n";
8355         } elsif ($format eq 'atom') {
8356                 print "</feed>\n";
8357         }
8358 }
8359
8360 sub git_rss {
8361         git_feed('rss');
8362 }
8363
8364 sub git_atom {
8365         git_feed('atom');
8366 }
8367
8368 sub git_opml {
8369         my @list = git_get_projects_list($project_filter, $strict_export);
8370         if (!@list) {
8371                 die_error(404, "No projects found");
8372         }
8373
8374         print $cgi->header(
8375                 -type => 'text/xml',
8376                 -charset => 'utf-8',
8377                 -content_disposition => 'inline; filename="opml.xml"');
8378
8379         my $title = esc_html($site_name);
8380         my $filter = " within subdirectory ";
8381         if (defined $project_filter) {
8382                 $filter .= esc_html($project_filter);
8383         } else {
8384                 $filter = "";
8385         }
8386         print <<XML;
8387 <?xml version="1.0" encoding="utf-8"?>
8388 <opml version="1.0">
8389 <head>
8390   <title>$title OPML Export$filter</title>
8391 </head>
8392 <body>
8393 <outline text="git RSS feeds">
8394 XML
8395
8396         foreach my $pr (@list) {
8397                 my %proj = %$pr;
8398                 my $head = git_get_head_hash($proj{'path'});
8399                 if (!defined $head) {
8400                         next;
8401                 }
8402                 $git_dir = "$projectroot/$proj{'path'}";
8403                 my %co = parse_commit($head);
8404                 if (!%co) {
8405                         next;
8406                 }
8407
8408                 my $path = esc_html(chop_str($proj{'path'}, 25, 5));
8409                 my $rss  = href('project' => $proj{'path'}, 'action' => 'rss', -full => 1);
8410                 my $html = href('project' => $proj{'path'}, 'action' => 'summary', -full => 1);
8411                 print "<outline type=\"rss\" text=\"$path\" title=\"$path\" xmlUrl=\"$rss\" htmlUrl=\"$html\"/>\n";
8412         }
8413         print <<XML;
8414 </outline>
8415 </body>
8416 </opml>
8417 XML
8418 }