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

   1 #!/usr/bin/perl
   2
   3 # gitweb - simple web interface to track changes in git repositories
   4 #
   5 # (C) 2005-2006, Kay Sievers <kay.sievers@vrfy.org>
   6 # (C) 2005, Christian Gierke
   7 #
   8 # This program is licensed under the GPLv2
   9
  10 use 5.008;
  11 use strict;
  12 use warnings;
  13 use CGI qw(:standard :escapeHTML -nosticky);
  14 use CGI::Util qw(unescape);
  15 use CGI::Carp qw(fatalsToBrowser set_message);
  16 use Encode;
  17 use Fcntl ':mode';
  18 use File::Find qw();
  19 use File::Basename qw(basename);
  20 use Time::HiRes qw(gettimeofday tv_interval);
  21 binmode STDOUT, ':utf8';
  22
  23 if (!defined($CGI::VERSION) || $CGI::VERSION < 4.08) {
  24         eval 'sub CGI::multi_param { CGI::param(@_) }'
  25 }
  26
  27 our $t0 = [ gettimeofday() ];
  28 our $number_of_git_cmds = 0;
  29
  30 BEGIN {
  31         CGI->compile() if $ENV{'MOD_PERL'};
  32 }
  33
  34 our $version = "++GIT_VERSION++";
  35
  36 our ($my_url, $my_uri, $base_url, $path_info, $home_link);
  37 sub evaluate_uri {
  38         our $cgi;
  39
  40         our $my_url = $cgi->url();
  41         our $my_uri = $cgi->url(-absolute => 1);
  42
  43         # Base URL for relative URLs in gitweb ($logo, $favicon, ...),
  44         # needed and used only for URLs with nonempty PATH_INFO
  45         our $base_url = $my_url;
  46
  47         # When the script is used as DirectoryIndex, the URL does not contain the name
  48         # of the script file itself, and $cgi->url() fails to strip PATH_INFO, so we
  49         # have to do it ourselves. We make $path_info global because it's also used
  50         # later on.
  51         #
  52         # Another issue with the script being the DirectoryIndex is that the resulting
  53         # $my_url data is not the full script URL: this is good, because we want
  54         # generated links to keep implying the script name if it wasn't explicitly
  55         # indicated in the URL we're handling, but it means that $my_url cannot be used
  56         # as base URL.
  57         # Therefore, if we needed to strip PATH_INFO, then we know that we have
  58         # to build the base URL ourselves:
  59         our $path_info = decode_utf8($ENV{"PATH_INFO"});
  60         if ($path_info) {
  61                 # $path_info has already been URL-decoded by the web server, but
  62                 # $my_url and $my_uri have not. URL-decode them so we can properly
  63                 # strip $path_info.
  64                 $my_url = unescape($my_url);
  65                 $my_uri = unescape($my_uri);
  66                 if ($my_url =~ s,\Q$path_info\E$,, &&
  67                     $my_uri =~ s,\Q$path_info\E$,, &&
  68                     defined $ENV{'SCRIPT_NAME'}) {
  69                         $base_url = $cgi->url(-base => 1) . $ENV{'SCRIPT_NAME'};
  70                 }
  71         }
  72
  73         # target of the home link on top of all pages
  74         our $home_link = $my_uri || "/";
  75 }
  76
  77 # core git executable to use
  78 # this can just be "git" if your webserver has a sensible PATH
  79 our $GIT = "++GIT_BINDIR++/git";
  80
  81 # absolute fs-path which will be prepended to the project path
  82 #our $projectroot = "/pub/scm";
  83 our $projectroot = "++GITWEB_PROJECTROOT++";
  84
  85 # fs traversing limit for getting project list
  86 # the number is relative to the projectroot
  87 our $project_maxdepth = "++GITWEB_PROJECT_MAXDEPTH++";
  88
  89 # string of the home link on top of all pages
  90 our $home_link_str = "++GITWEB_HOME_LINK_STR++";
  91
  92 # extra breadcrumbs preceding the home link
  93 our @extra_breadcrumbs = ();
  94
  95 # name of your site or organization to appear in page titles
  96 # replace this with something more descriptive for clearer bookmarks
  97 our $site_name = "++GITWEB_SITENAME++"
  98                  || ($ENV{'SERVER_NAME'} || "Untitled") . " Git";
  99
 100 # html snippet to include in the <head> section of each page
 101 our $site_html_head_string = "++GITWEB_SITE_HTML_HEAD_STRING++";
 102 # filename of html text to include at top of each page
 103 our $site_header = "++GITWEB_SITE_HEADER++";
 104 # html text to include at home page
 105 our $home_text = "++GITWEB_HOMETEXT++";
 106 # filename of html text to include at bottom of each page
 107 our $site_footer = "++GITWEB_SITE_FOOTER++";
 108
 109 # URI of stylesheets
 110 our @stylesheets = ("++GITWEB_CSS++");
 111 # URI of a single stylesheet, which can be overridden in GITWEB_CONFIG.
 112 our $stylesheet = undef;
 113
 114 # URI of GIT logo (72x27 size)
 115 our $logo = "++GITWEB_LOGO++";
 116 # URI of GIT favicon, assumed to be image/png type
 117 our $favicon = "++GITWEB_FAVICON++";
 118 # URI of gitweb.js (JavaScript code for gitweb)
 119 our $javascript = "++GITWEB_JS++";
 120
 121 # URI and label (title) of GIT logo link
 122 #our $logo_url = "http://www.kernel.org/pub/software/scm/git/docs/";
 123 #our $logo_label = "git documentation";
 124 our $logo_url = "http://git-scm.com/";
 125 our $logo_label = "git homepage";
 126
 127 # source of projects list
 128 our $projects_list = "++GITWEB_LIST++";
 129
 130 # the width (in characters) of the projects list "Description" column
 131 our $projects_list_description_width = 25;
 132
 133 # group projects by category on the projects list
 134 # (enabled if this variable evaluates to true)
 135 our $projects_list_group_categories = 0;
 136
 137 # default category if none specified
 138 # (leave the empty string for no category)
 139 our $project_list_default_category = "";
 140
 141 # default order of projects list
 142 # valid values are none, project, descr, owner, and age
 143 our $default_projects_order = "project";
 144
 145 # show repository only if this file exists
 146 # (only effective if this variable evaluates to true)
 147 our $export_ok = "++GITWEB_EXPORT_OK++";
 148
 149 # don't generate age column on the projects list page
 150 our $omit_age_column = 0;
 151
 152 # don't generate information about owners of repositories
 153 our $omit_owner=0;
 154
 155 # show repository only if this subroutine returns true
 156 # when given the path to the project, for example:
 157 #    sub { return -e "$_[0]/git-daemon-export-ok"; }
 158 our $export_auth_hook = undef;
 159
 160 # only allow viewing of repositories also shown on the overview page
 161 our $strict_export = "++GITWEB_STRICT_EXPORT++";
 162
 163 # list of git base URLs used for URL to where fetch project from,
 164 # i.e. full URL is "$git_base_url/$project"
 165 our @git_base_url_list = grep { $_ ne '' } ("++GITWEB_BASE_URL++");
 166
 167 # default blob_plain mimetype and default charset for text/plain blob
 168 our $default_blob_plain_mimetype = 'text/plain';
 169 our $default_text_plain_charset  = undef;
 170
 171 # file to use for guessing MIME types before trying /etc/mime.types
 172 # (relative to the current git repository)
 173 our $mimetypes_file = undef;
 174
 175 # assume this charset if line contains non-UTF-8 characters;
 176 # it should be valid encoding (see Encoding::Supported(3pm) for list),
 177 # for which encoding all byte sequences are valid, for example
 178 # 'iso-8859-1' aka 'latin1' (it is decoded without checking, so it
 179 # could be even 'utf-8' for the old behavior)
 180 our $fallback_encoding = 'latin1';
 181
 182 # rename detection options for git-diff and git-diff-tree
 183 # - default is '-M', with the cost proportional to
 184 #   (number of removed files) * (number of new files).
 185 # - more costly is '-C' (which implies '-M'), with the cost proportional to
 186 #   (number of changed files + number of removed files) * (number of new files)
 187 # - even more costly is '-C', '--find-copies-harder' with cost
 188 #   (number of files in the original tree) * (number of new files)
 189 # - one might want to include '-B' option, e.g. '-B', '-M'
 190 our @diff_opts = ('-M'); # taken from git_commit
 191
 192 # Disables features that would allow repository owners to inject script into
 193 # the gitweb domain.
 194 our $prevent_xss = 0;
 195
 196 # Path to the highlight executable to use (must be the one from
 197 # http://www.andre-simon.de due to assumptions about parameters and output).
 198 # Useful if highlight is not installed on your webserver's PATH.
 199 # [Default: highlight]
 200 our $highlight_bin = "++HIGHLIGHT_BIN++";
 201
 202 # information about snapshot formats that gitweb is capable of serving
 203 our %known_snapshot_formats = (
 204         # name => {
 205         #       'display' => display name,
 206         #       'type' => mime type,
 207         #       'suffix' => filename suffix,
 208         #       'format' => --format for git-archive,
 209         #       'compressor' => [compressor command and arguments]
 210         #                       (array reference, optional)
 211         #       'disabled' => boolean (optional)}
 212         #
 213         'tgz' => {
 214                 'display' => 'tar.gz',
 215                 'type' => 'application/x-gzip',
 216                 'suffix' => '.tar.gz',
 217                 'format' => 'tar',
 218                 'compressor' => ['gzip', '-n']},
 219
 220         'tbz2' => {
 221                 'display' => 'tar.bz2',
 222                 'type' => 'application/x-bzip2',
 223                 'suffix' => '.tar.bz2',
 224                 'format' => 'tar',
 225                 'compressor' => ['bzip2']},
 226
 227         'txz' => {
 228                 'display' => 'tar.xz',
 229                 'type' => 'application/x-xz',
 230                 'suffix' => '.tar.xz',
 231                 'format' => 'tar',
 232                 'compressor' => ['xz'],
 233                 'disabled' => 1},
 234
 235         'zip' => {
 236                 'display' => 'zip',
 237                 'type' => 'application/x-zip',
 238                 'suffix' => '.zip',
 239                 'format' => 'zip'},
 240 );
 241
 242 # Aliases so we understand old gitweb.snapshot values in repository
 243 # configuration.
 244 our %known_snapshot_format_aliases = (
 245         'gzip'  => 'tgz',
 246         'bzip2' => 'tbz2',
 247         'xz'    => 'txz',
 248
 249         # backward compatibility: legacy gitweb config support
 250         'x-gzip' => undef, 'gz' => undef,
 251         'x-bzip2' => undef, 'bz2' => undef,
 252         'x-zip' => undef, '' => undef,
 253 );
 254
 255 # Pixel sizes for icons and avatars. If the default font sizes or lineheights
 256 # are changed, it may be appropriate to change these values too via
 257 # $GITWEB_CONFIG.
 258 our %avatar_size = (
 259         'default' => 16,
 260         'double'  => 32
 261 );
 262
 263 # Used to set the maximum load that we will still respond to gitweb queries.
 264 # If server load exceed this value then return "503 server busy" error.
 265 # If gitweb cannot determined server load, it is taken to be 0.
 266 # Leave it undefined (or set to 'undef') to turn off load checking.
 267 our $maxload = 300;
 268
 269 # configuration for 'highlight' (http://www.andre-simon.de/)
 270 # match by basename
 271 our %highlight_basename = (
 272         #'Program' => 'py',
 273         #'Library' => 'py',
 274         'SConstruct' => 'py', # SCons equivalent of Makefile
 275         'Makefile' => 'make',
 276 );
 277 # match by extension
 278 our %highlight_ext = (
 279         # main extensions, defining name of syntax;
 280         # see files in /usr/share/highlight/langDefs/ directory
 281         (map { $_ => $_ } qw(py rb java css js tex bib xml awk bat ini spec tcl sql)),
 282         # alternate extensions, see /etc/highlight/filetypes.conf
 283         (map { $_ => 'c'   } qw(c h)),
 284         (map { $_ => 'sh'  } qw(sh bash zsh ksh)),
 285         (map { $_ => 'cpp' } qw(cpp cxx c++ cc)),
 286         (map { $_ => 'php' } qw(php php3 php4 php5 phps)),
 287         (map { $_ => 'pl'  } qw(pl perl pm)), # perhaps also 'cgi'
 288         (map { $_ => 'make'} qw(make mak mk)),
 289         (map { $_ => 'xml' } qw(xml xhtml html htm)),
 290 );
 291
 292 # You define site-wide feature defaults here; override them with
 293 # $GITWEB_CONFIG as necessary.
 294 our %feature = (
 295         # feature => {
 296         #       'sub' => feature-sub (subroutine),
 297         #       'override' => allow-override (boolean),
 298         #       'default' => [ default options...] (array reference)}
 299         #
 300         # if feature is overridable (it means that allow-override has true value),
 301         # then feature-sub will be called with default options as parameters;
 302         # return value of feature-sub indicates if to enable specified feature
 303         #
 304         # if there is no 'sub' key (no feature-sub), then feature cannot be
 305         # overridden
 306         #
 307         # use gitweb_get_feature(<feature>) to retrieve the <feature> value
 308         # (an array) or gitweb_check_feature(<feature>) to check if <feature>
 309         # is enabled
 310
 311         # Enable the 'blame' blob view, showing the last commit that modified
 312         # each line in the file. This can be very CPU-intensive.
 313
 314         # To enable system wide have in $GITWEB_CONFIG
 315         # $feature{'blame'}{'default'} = [1];
 316         # To have project specific config enable override in $GITWEB_CONFIG
 317         # $feature{'blame'}{'override'} = 1;
 318         # and in project config gitweb.blame = 0|1;
 319         'blame' => {
 320                 'sub' => sub { feature_bool('blame', @_) },
 321                 'override' => 0,
 322                 'default' => [0]},
 323
 324         # Enable the 'snapshot' link, providing a compressed archive of any
 325         # tree. This can potentially generate high traffic if you have large
 326         # project.
 327
 328         # Value is a list of formats defined in %known_snapshot_formats that
 329         # you wish to offer.
 330         # To disable system wide have in $GITWEB_CONFIG
 331         # $feature{'snapshot'}{'default'} = [];
 332         # To have project specific config enable override in $GITWEB_CONFIG
 333         # $feature{'snapshot'}{'override'} = 1;
 334         # and in project config, a comma-separated list of formats or "none"
 335         # to disable.  Example: gitweb.snapshot = tbz2,zip;
 336         'snapshot' => {
 337                 'sub' => \&feature_snapshot,
 338                 'override' => 0,
 339                 'default' => ['tgz']},
 340
 341         # Enable text search, which will list the commits which match author,
 342         # committer or commit text to a given string.  Enabled by default.
 343         # Project specific override is not supported.
 344         #
 345         # Note that this controls all search features, which means that if
 346         # it is disabled, then 'grep' and 'pickaxe' search would also be
 347         # disabled.
 348         'search' => {
 349                 'override' => 0,
 350                 'default' => [1]},
 351
 352         # Enable grep search, which will list the files in currently selected
 353         # tree containing the given string. Enabled by default. This can be
 354         # potentially CPU-intensive, of course.
 355         # Note that you need to have 'search' feature enabled too.
 356
 357         # To enable system wide have in $GITWEB_CONFIG
 358         # $feature{'grep'}{'default'} = [1];
 359         # To have project specific config enable override in $GITWEB_CONFIG
 360         # $feature{'grep'}{'override'} = 1;
 361         # and in project config gitweb.grep = 0|1;
 362         'grep' => {
 363                 'sub' => sub { feature_bool('grep', @_) },
 364                 'override' => 0,
 365                 'default' => [1]},
 366
 367         # Enable the pickaxe search, which will list the commits that modified
 368         # a given string in a file. This can be practical and quite faster
 369         # alternative to 'blame', but still potentially CPU-intensive.
 370         # Note that you need to have 'search' feature enabled too.
 371
 372         # To enable system wide have in $GITWEB_CONFIG
 373         # $feature{'pickaxe'}{'default'} = [1];
 374         # To have project specific config enable override in $GITWEB_CONFIG
 375         # $feature{'pickaxe'}{'override'} = 1;
 376         # and in project config gitweb.pickaxe = 0|1;
 377         'pickaxe' => {
 378                 'sub' => sub { feature_bool('pickaxe', @_) },
 379                 'override' => 0,
 380                 'default' => [1]},
 381
 382         # Enable showing size of blobs in a 'tree' view, in a separate
 383         # column, similar to what 'ls -l' does.  This cost a bit of IO.
 384
 385         # To disable system wide have in $GITWEB_CONFIG
 386         # $feature{'show-sizes'}{'default'} = [0];
 387         # To have project specific config enable override in $GITWEB_CONFIG
 388         # $feature{'show-sizes'}{'override'} = 1;
 389         # and in project config gitweb.showsizes = 0|1;
 390         'show-sizes' => {
 391                 'sub' => sub { feature_bool('showsizes', @_) },
 392                 'override' => 0,
 393                 'default' => [1]},
 394
 395         # Make gitweb use an alternative format of the URLs which can be
 396         # more readable and natural-looking: project name is embedded
 397         # directly in the path and the query string contains other
 398         # auxiliary information. All gitweb installations recognize
 399         # URL in either format; this configures in which formats gitweb
 400         # generates links.
 401
 402         # To enable system wide have in $GITWEB_CONFIG
 403         # $feature{'pathinfo'}{'default'} = [1];
 404         # Project specific override is not supported.
 405
 406         # Note that you will need to change the default location of CSS,
 407         # favicon, logo and possibly other files to an absolute URL. Also,
 408         # if gitweb.cgi serves as your indexfile, you will need to force
 409         # $my_uri to contain the script name in your $GITWEB_CONFIG.
 410         'pathinfo' => {
 411                 'override' => 0,
 412                 'default' => [0]},
 413
 414         # Make gitweb consider projects in project root subdirectories
 415         # to be forks of existing projects. Given project $projname.git,
 416         # projects matching $projname/*.git will not be shown in the main
 417         # projects list, instead a '+' mark will be added to $projname
 418         # there and a 'forks' view will be enabled for the project, listing
 419         # all the forks. If project list is taken from a file, forks have
 420         # to be listed after the main project.
 421
 422         # To enable system wide have in $GITWEB_CONFIG
 423         # $feature{'forks'}{'default'} = [1];
 424         # Project specific override is not supported.
 425         'forks' => {
 426                 'override' => 0,
 427                 'default' => [0]},
 428
 429         # Insert custom links to the action bar of all project pages.
 430         # This enables you mainly to link to third-party scripts integrating
 431         # into gitweb; e.g. git-browser for graphical history representation
 432         # or custom web-based repository administration interface.
 433
 434         # The 'default' value consists of a list of triplets in the form
 435         # (label, link, position) where position is the label after which
 436         # to insert the link and link is a format string where %n expands
 437         # to the project name, %f to the project path within the filesystem,
 438         # %h to the current hash (h gitweb parameter) and %b to the current
 439         # hash base (hb gitweb parameter); %% expands to %.
 440
 441         # To enable system wide have in $GITWEB_CONFIG e.g.
 442         # $feature{'actions'}{'default'} = [('graphiclog',
 443         #       '/git-browser/by-commit.html?r=%n', 'summary')];
 444         # Project specific override is not supported.
 445         'actions' => {
 446                 'override' => 0,
 447                 'default' => []},
 448
 449         # Allow gitweb scan project content tags of project repository,
 450         # and display the popular Web 2.0-ish "tag cloud" near the projects
 451         # list.  Note that this is something COMPLETELY different from the
 452         # normal Git tags.
 453
 454         # gitweb by itself can show existing tags, but it does not handle
 455         # tagging itself; you need to do it externally, outside gitweb.
 456         # The format is described in git_get_project_ctags() subroutine.
 457         # You may want to install the HTML::TagCloud Perl module to get
 458         # a pretty tag cloud instead of just a list of tags.
 459
 460         # To enable system wide have in $GITWEB_CONFIG
 461         # $feature{'ctags'}{'default'} = [1];
 462         # Project specific override is not supported.
 463
 464         # In the future whether ctags editing is enabled might depend
 465         # on the value, but using 1 should always mean no editing of ctags.
 466         'ctags' => {
 467                 'override' => 0,
 468                 'default' => [0]},
 469
 470         # The maximum number of patches in a patchset generated in patch
 471         # view. Set this to 0 or undef to disable patch view, or to a
 472         # negative number to remove any limit.
 473
 474         # To disable system wide have in $GITWEB_CONFIG
 475         # $feature{'patches'}{'default'} = [0];
 476         # To have project specific config enable override in $GITWEB_CONFIG
 477         # $feature{'patches'}{'override'} = 1;
 478         # and in project config gitweb.patches = 0|n;
 479         # where n is the maximum number of patches allowed in a patchset.
 480         'patches' => {
 481                 'sub' => \&feature_patches,
 482                 'override' => 0,
 483                 'default' => [16]},
 484
 485         # Avatar support. When this feature is enabled, views such as
 486         # shortlog or commit will display an avatar associated with
 487         # the email of the committer(s) and/or author(s).
 488
 489         # Currently available providers are gravatar and picon.
 490         # If an unknown provider is specified, the feature is disabled.
 491
 492         # Gravatar depends on Digest::MD5.
 493         # Picon currently relies on the indiana.edu database.
 494
 495         # To enable system wide have in $GITWEB_CONFIG
 496         # $feature{'avatar'}{'default'} = ['<provider>'];
 497         # where <provider> is either gravatar or picon.
 498         # To have project specific config enable override in $GITWEB_CONFIG
 499         # $feature{'avatar'}{'override'} = 1;
 500         # and in project config gitweb.avatar = <provider>;
 501         'avatar' => {
 502                 'sub' => \&feature_avatar,
 503                 'override' => 0,
 504                 'default' => ['']},
 505
 506         # Enable displaying how much time and how many git commands
 507         # it took to generate and display page.  Disabled by default.
 508         # Project specific override is not supported.
 509         'timed' => {
 510                 'override' => 0,
 511                 'default' => [0]},
 512
 513         # Enable turning some links into links to actions which require
 514         # JavaScript to run (like 'blame_incremental').  Not enabled by
 515         # default.  Project specific override is currently not supported.
 516         'javascript-actions' => {
 517                 'override' => 0,
 518                 'default' => [0]},
 519
 520         # Enable and configure ability to change common timezone for dates
 521         # in gitweb output via JavaScript.  Enabled by default.
 522         # Project specific override is not supported.
 523         'javascript-timezone' => {
 524                 'override' => 0,
 525                 'default' => [
 526                         'local',     # default timezone: 'utc', 'local', or '(-|+)HHMM' format,
 527                                      # or undef to turn off this feature
 528                         'gitweb_tz', # name of cookie where to store selected timezone
 529                         'datetime',  # CSS class used to mark up dates for manipulation
 530                 ]},
 531
 532         # Syntax highlighting support. This is based on Daniel Svensson's
 533         # and Sham Chukoury's work in gitweb-xmms2.git.
 534         # It requires the 'highlight' program present in $PATH,
 535         # and therefore is disabled by default.
 536
 537         # To enable system wide have in $GITWEB_CONFIG
 538         # $feature{'highlight'}{'default'} = [1];
 539
 540         'highlight' => {
 541                 'sub' => sub { feature_bool('highlight', @_) },
 542                 'override' => 0,
 543                 'default' => [0]},
 544
 545         # Enable displaying of remote heads in the heads list
 546
 547         # To enable system wide have in $GITWEB_CONFIG
 548         # $feature{'remote_heads'}{'default'} = [1];
 549         # To have project specific config enable override in $GITWEB_CONFIG
 550         # $feature{'remote_heads'}{'override'} = 1;
 551         # and in project config gitweb.remoteheads = 0|1;
 552         'remote_heads' => {
 553                 'sub' => sub { feature_bool('remote_heads', @_) },
 554                 'override' => 0,
 555                 'default' => [0]},
 556
 557         # Enable showing branches under other refs in addition to heads
 558
 559         # To set system wide extra branch refs have in $GITWEB_CONFIG
 560         # $feature{'extra-branch-refs'}{'default'} = ['dirs', 'of', 'choice'];
 561         # To have project specific config enable override in $GITWEB_CONFIG
 562         # $feature{'extra-branch-refs'}{'override'} = 1;
 563         # and in project config gitweb.extrabranchrefs = dirs of choice
 564         # Every directory is separated with whitespace.
 565
 566         'extra-branch-refs' => {
 567                 'sub' => \&feature_extra_branch_refs,
 568                 'override' => 0,
 569                 'default' => []},
 570 );
 571
 572 sub gitweb_get_feature {
 573         my ($name) = @_;
 574         return unless exists $feature{$name};
 575         my ($sub, $override, @defaults) = (
 576                 $feature{$name}{'sub'},
 577                 $feature{$name}{'override'},
 578                 @{$feature{$name}{'default'}});
 579         # project specific override is possible only if we have project
 580         our $git_dir; # global variable, declared later
 581         if (!$override || !defined $git_dir) {
 582                 return @defaults;
 583         }
 584         if (!defined $sub) {
 585                 warn "feature $name is not overridable";
 586                 return @defaults;
 587         }
 588         return $sub->(@defaults);
 589 }
 590
 591 # A wrapper to check if a given feature is enabled.
 592 # With this, you can say
 593 #
 594 #   my $bool_feat = gitweb_check_feature('bool_feat');
 595 #   gitweb_check_feature('bool_feat') or somecode;
 596 #
 597 # instead of
 598 #
 599 #   my ($bool_feat) = gitweb_get_feature('bool_feat');
 600 #   (gitweb_get_feature('bool_feat'))[0] or somecode;
 601 #
 602 sub gitweb_check_feature {
 603         return (gitweb_get_feature(@_))[0];
 604 }
 605
 606
 607 sub feature_bool {
 608         my $key = shift;
 609         my ($val) = git_get_project_config($key, '--bool');
 610
 611         if (!defined $val) {
 612                 return ($_[0]);
 613         } elsif ($val eq 'true') {
 614                 return (1);
 615         } elsif ($val eq 'false') {
 616                 return (0);
 617         }
 618 }
 619
 620 sub feature_snapshot {
 621         my (@fmts) = @_;
 622
 623         my ($val) = git_get_project_config('snapshot');
 624
 625         if ($val) {
 626                 @fmts = ($val eq 'none' ? () : split /\s*[,\s]\s*/, $val);
 627         }
 628
 629         return @fmts;
 630 }
 631
 632 sub feature_patches {
 633         my @val = (git_get_project_config('patches', '--int'));
 634
 635         if (@val) {
 636                 return @val;
 637         }
 638
 639         return ($_[0]);
 640 }
 641
 642 sub feature_avatar {
 643         my @val = (git_get_project_config('avatar'));
 644
 645         return @val ? @val : @_;
 646 }
 647
 648 sub feature_extra_branch_refs {
 649         my (@branch_refs) = @_;
 650         my $values = git_get_project_config('extrabranchrefs');
 651
 652         if ($values) {
 653                 $values = config_to_multi ($values);
 654                 @branch_refs = ();
 655                 foreach my $value (@{$values}) {
 656                         push @branch_refs, split /\s+/, $value;
 657                 }
 658         }
 659
 660         return @branch_refs;
 661 }
 662
 663 # checking HEAD file with -e is fragile if the repository was
 664 # initialized long time ago (i.e. symlink HEAD) and was pack-ref'ed
 665 # and then pruned.
 666 sub check_head_link {
 667         my ($dir) = @_;
 668         my $headfile = "$dir/HEAD";
 669         return ((-e $headfile) ||
 670                 (-l $headfile && readlink($headfile) =~ /^refs\/heads\//));
 671 }
 672
 673 sub check_export_ok {
 674         my ($dir) = @_;
 675         return (check_head_link($dir) &&
 676                 (!$export_ok || -e "$dir/$export_ok") &&
 677                 (!$export_auth_hook || $export_auth_hook->($dir)));
 678 }
 679
 680 # process alternate names for backward compatibility
 681 # filter out unsupported (unknown) snapshot formats
 682 sub filter_snapshot_fmts {
 683         my @fmts = @_;
 684
 685         @fmts = map {
 686                 exists $known_snapshot_format_aliases{$_} ?
 687                        $known_snapshot_format_aliases{$_} : $_} @fmts;
 688         @fmts = grep {
 689                 exists $known_snapshot_formats{$_} &&
 690                 !$known_snapshot_formats{$_}{'disabled'}} @fmts;
 691 }
 692
 693 sub filter_and_validate_refs {
 694         my @refs = @_;
 695         my %unique_refs = ();
 696
 697         foreach my $ref (@refs) {
 698                 die_error(500, "Invalid ref '$ref' in 'extra-branch-refs' feature") unless (is_valid_ref_format($ref));
 699                 # 'heads' are added implicitly in get_branch_refs().
 700                 $unique_refs{$ref} = 1 if ($ref ne 'heads');
 701         }
 702         return sort keys %unique_refs;
 703 }
 704
 705 # If it is set to code reference, it is code that it is to be run once per
 706 # request, allowing updating configurations that change with each request,
 707 # while running other code in config file only once.
 708 #
 709 # Otherwise, if it is false then gitweb would process config file only once;
 710 # if it is true then gitweb config would be run for each request.
 711 our $per_request_config = 1;
 712
 713 # read and parse gitweb config file given by its parameter.
 714 # returns true on success, false on recoverable error, allowing
 715 # to chain this subroutine, using first file that exists.
 716 # dies on errors during parsing config file, as it is unrecoverable.
 717 sub read_config_file {
 718         my $filename = shift;
 719         return unless defined $filename;
 720         # die if there are errors parsing config file
 721         if (-e $filename) {
 722                 do $filename;
 723                 die $@ if $@;
 724                 return 1;
 725         }
 726         return;
 727 }
 728
 729 our ($GITWEB_CONFIG, $GITWEB_CONFIG_SYSTEM, $GITWEB_CONFIG_COMMON);
 730 sub evaluate_gitweb_config {
 731         our $GITWEB_CONFIG = $ENV{'GITWEB_CONFIG'} || "++GITWEB_CONFIG++";
 732         our $GITWEB_CONFIG_SYSTEM = $ENV{'GITWEB_CONFIG_SYSTEM'} || "++GITWEB_CONFIG_SYSTEM++";
 733         our $GITWEB_CONFIG_COMMON = $ENV{'GITWEB_CONFIG_COMMON'} || "++GITWEB_CONFIG_COMMON++";
 734
 735         # Protect against duplications of file names, to not read config twice.
 736         # Only one of $GITWEB_CONFIG and $GITWEB_CONFIG_SYSTEM is used, so
 737         # there possibility of duplication of filename there doesn't matter.
 738         $GITWEB_CONFIG = ""        if ($GITWEB_CONFIG eq $GITWEB_CONFIG_COMMON);
 739         $GITWEB_CONFIG_SYSTEM = "" if ($GITWEB_CONFIG_SYSTEM eq $GITWEB_CONFIG_COMMON);
 740
 741         # Common system-wide settings for convenience.
 742         # Those settings can be ovverriden by GITWEB_CONFIG or GITWEB_CONFIG_SYSTEM.
 743         read_config_file($GITWEB_CONFIG_COMMON);
 744
 745         # Use first config file that exists.  This means use the per-instance
 746         # GITWEB_CONFIG if exists, otherwise use GITWEB_SYSTEM_CONFIG.
 747         read_config_file($GITWEB_CONFIG) and return;
 748         read_config_file($GITWEB_CONFIG_SYSTEM);
 749 }
 750
 751 # Get loadavg of system, to compare against $maxload.
 752 # Currently it requires '/proc/loadavg' present to get loadavg;
 753 # if it is not present it returns 0, which means no load checking.
 754 sub get_loadavg {
 755         if( -e '/proc/loadavg' ){
 756                 open my $fd, '<', '/proc/loadavg'
 757                         or return 0;
 758                 my @load = split(/\s+/, scalar <$fd>);
 759                 close $fd;
 760
 761                 # The first three columns measure CPU and IO utilization of the last one,
 762                 # five, and 10 minute periods.  The fourth column shows the number of
 763                 # currently running processes and the total number of processes in the m/n
 764                 # format.  The last column displays the last process ID used.
 765                 return $load[0] || 0;
 766         }
 767         # additional checks for load average should go here for things that don't export
 768         # /proc/loadavg
 769
 770         return 0;
 771 }
 772
 773 # version of the core git binary
 774 our $git_version;
 775 sub evaluate_git_version {
 776         our $git_version = qx("$GIT" --version) =~ m/git version (.*)$/ ? $1 : "unknown";
 777         $number_of_git_cmds++;
 778 }
 779
 780 sub check_loadavg {
 781         if (defined $maxload && get_loadavg() > $maxload) {
 782                 die_error(503, "The load average on the server is too high");
 783         }
 784 }
 785
 786 # ======================================================================
 787 # input validation and dispatch
 788
 789 # input parameters can be collected from a variety of sources (presently, CGI
 790 # and PATH_INFO), so we define an %input_params hash that collects them all
 791 # together during validation: this allows subsequent uses (e.g. href()) to be
 792 # agnostic of the parameter origin
 793
 794 our %input_params = ();
 795
 796 # input parameters are stored with the long parameter name as key. This will
 797 # also be used in the href subroutine to convert parameters to their CGI
 798 # equivalent, and since the href() usage is the most frequent one, we store
 799 # the name -> CGI key mapping here, instead of the reverse.
 800 #
 801 # XXX: Warning: If you touch this, check the search form for updating,
 802 # too.
 803
 804 our @cgi_param_mapping = (
 805         project => "p",
 806         action => "a",
 807         file_name => "f",
 808         file_parent => "fp",
 809         hash => "h",
 810         hash_parent => "hp",
 811         hash_base => "hb",
 812         hash_parent_base => "hpb",
 813         page => "pg",
 814         order => "o",
 815         searchtext => "s",
 816         searchtype => "st",
 817         snapshot_format => "sf",
 818         extra_options => "opt",
 819         search_use_regexp => "sr",
 820         ctag => "by_tag",
 821         diff_style => "ds",
 822         project_filter => "pf",
 823         # this must be last entry (for manipulation from JavaScript)
 824         javascript => "js"
 825 );
 826 our %cgi_param_mapping = @cgi_param_mapping;
 827
 828 # we will also need to know the possible actions, for validation
 829 our %actions = (
 830         "blame" => \&git_blame,
 831         "blame_incremental" => \&git_blame_incremental,
 832         "blame_data" => \&git_blame_data,
 833         "blobdiff" => \&git_blobdiff,
 834         "blobdiff_plain" => \&git_blobdiff_plain,
 835         "blob" => \&git_blob,
 836         "blob_plain" => \&git_blob_plain,
 837         "commitdiff" => \&git_commitdiff,
 838         "commitdiff_plain" => \&git_commitdiff_plain,
 839         "commit" => \&git_commit,
 840         "forks" => \&git_forks,
 841         "heads" => \&git_heads,
 842         "history" => \&git_history,
 843         "log" => \&git_log,
 844         "patch" => \&git_patch,
 845         "patches" => \&git_patches,
 846         "remotes" => \&git_remotes,
 847         "rss" => \&git_rss,
 848         "atom" => \&git_atom,
 849         "search" => \&git_search,
 850         "search_help" => \&git_search_help,
 851         "shortlog" => \&git_shortlog,
 852         "summary" => \&git_summary,
 853         "tag" => \&git_tag,
 854         "tags" => \&git_tags,
 855         "tree" => \&git_tree,
 856         "snapshot" => \&git_snapshot,
 857         "object" => \&git_object,
 858         # those below don't need $project
 859         "opml" => \&git_opml,
 860         "project_list" => \&git_project_list,
 861         "project_index" => \&git_project_index,
 862 );
 863
 864 # finally, we have the hash of allowed extra_options for the commands that
 865 # allow them
 866 our %allowed_options = (
 867         "--no-merges" => [ qw(rss atom log shortlog history) ],
 868 );
 869
 870 # fill %input_params with the CGI parameters. All values except for 'opt'
 871 # should be single values, but opt can be an array. We should probably
 872 # build an array of parameters that can be multi-valued, but since for the time
 873 # being it's only this one, we just single it out
 874 sub evaluate_query_params {
 875         our $cgi;
 876
 877         while (my ($name, $symbol) = each %cgi_param_mapping) {
 878                 if ($symbol eq 'opt') {
 879                         $input_params{$name} = [ map { decode_utf8($_) } $cgi->multi_param($symbol) ];
 880                 } else {
 881                         $input_params{$name} = decode_utf8($cgi->param($symbol));
 882                 }
 883         }
 884 }
 885
 886 # now read PATH_INFO and update the parameter list for missing parameters
 887 sub evaluate_path_info {
 888         return if defined $input_params{'project'};
 889         return if !$path_info;
 890         $path_info =~ s,^/+,,;
 891         return if !$path_info;
 892
 893         # find which part of PATH_INFO is project
 894         my $project = $path_info;
 895         $project =~ s,/+$,,;
 896         while ($project && !check_head_link("$projectroot/$project")) {
 897                 $project =~ s,/*[^/]*$,,;
 898         }
 899         return unless $project;
 900         $input_params{'project'} = $project;
 901
 902         # do not change any parameters if an action is given using the query string
 903         return if $input_params{'action'};
 904         $path_info =~ s,^\Q$project\E/*,,;
 905
 906         # next, check if we have an action
 907         my $action = $path_info;
 908         $action =~ s,/.*$,,;
 909         if (exists $actions{$action}) {
 910                 $path_info =~ s,^$action/*,,;
 911                 $input_params{'action'} = $action;
 912         }
 913
 914         # list of actions that want hash_base instead of hash, but can have no
 915         # pathname (f) parameter
 916         my @wants_base = (
 917                 'tree',
 918                 'history',
 919         );
 920
 921         # we want to catch, among others
 922         # [$hash_parent_base[:$file_parent]..]$hash_parent[:$file_name]
 923         my ($parentrefname, $parentpathname, $refname, $pathname) =
 924                 ($path_info =~ /^(?:(.+?)(?::(.+))?\.\.)?([^:]+?)?(?::(.+))?$/);
 925
 926         # first, analyze the 'current' part
 927         if (defined $pathname) {
 928                 # we got "branch:filename" or "branch:dir/"
 929                 # we could use git_get_type(branch:pathname), but:
 930                 # - it needs $git_dir
 931                 # - it does a git() call
 932                 # - the convention of terminating directories with a slash
 933                 #   makes it superfluous
 934                 # - embedding the action in the PATH_INFO would make it even
 935                 #   more superfluous
 936                 $pathname =~ s,^/+,,;
 937                 if (!$pathname || substr($pathname, -1) eq "/") {
 938                         $input_params{'action'} ||= "tree";
 939                         $pathname =~ s,/$,,;
 940                 } else {
 941                         # the default action depends on whether we had parent info
 942                         # or not
 943                         if ($parentrefname) {
 944                                 $input_params{'action'} ||= "blobdiff_plain";
 945                         } else {
 946                                 $input_params{'action'} ||= "blob_plain";
 947                         }
 948                 }
 949                 $input_params{'hash_base'} ||= $refname;
 950                 $input_params{'file_name'} ||= $pathname;
 951         } elsif (defined $refname) {
 952                 # we got "branch". In this case we have to choose if we have to
 953                 # set hash or hash_base.
 954                 #
 955                 # Most of the actions without a pathname only want hash to be
 956                 # set, except for the ones specified in @wants_base that want
 957                 # hash_base instead. It should also be noted that hand-crafted
 958                 # links having 'history' as an action and no pathname or hash
 959                 # set will fail, but that happens regardless of PATH_INFO.
 960                 if (defined $parentrefname) {
 961                         # if there is parent let the default be 'shortlog' action
 962                         # (for http://git.example.com/repo.git/A..B links); if there
 963                         # is no parent, dispatch will detect type of object and set
 964                         # action appropriately if required (if action is not set)
 965                         $input_params{'action'} ||= "shortlog";
 966                 }
 967                 if ($input_params{'action'} &&
 968                     grep { $_ eq $input_params{'action'} } @wants_base) {
 969                         $input_params{'hash_base'} ||= $refname;
 970                 } else {
 971                         $input_params{'hash'} ||= $refname;
 972                 }
 973         }
 974
 975         # next, handle the 'parent' part, if present
 976         if (defined $parentrefname) {
 977                 # a missing pathspec defaults to the 'current' filename, allowing e.g.
 978                 # someproject/blobdiff/oldrev..newrev:/filename
 979                 if ($parentpathname) {
 980                         $parentpathname =~ s,^/+,,;
 981                         $parentpathname =~ s,/$,,;
 982                         $input_params{'file_parent'} ||= $parentpathname;
 983                 } else {
 984                         $input_params{'file_parent'} ||= $input_params{'file_name'};
 985                 }
 986                 # we assume that hash_parent_base is wanted if a path was specified,
 987                 # or if the action wants hash_base instead of hash
 988                 if (defined $input_params{'file_parent'} ||
 989                         grep { $_ eq $input_params{'action'} } @wants_base) {
 990                         $input_params{'hash_parent_base'} ||= $parentrefname;
 991                 } else {
 992                         $input_params{'hash_parent'} ||= $parentrefname;
 993                 }
 994         }
 995
 996         # for the snapshot action, we allow URLs in the form
 997         # $project/snapshot/$hash.ext
 998         # where .ext determines the snapshot and gets removed from the
 999         # passed $refname to provide the $hash.
1000         #
1001         # To be able to tell that $refname includes the format extension, we
1002         # require the following two conditions to be satisfied:
1003         # - the hash input parameter MUST have been set from the $refname part
1004         #   of the URL (i.e. they must be equal)
1005         # - the snapshot format MUST NOT have been defined already (e.g. from
1006         #   CGI parameter sf)
1007         # It's also useless to try any matching unless $refname has a dot,
1008         # so we check for that too
1009         if (defined $input_params{'action'} &&
1010                 $input_params{'action'} eq 'snapshot' &&
1011                 defined $refname && index($refname, '.') != -1 &&
1012                 $refname eq $input_params{'hash'} &&
1013                 !defined $input_params{'snapshot_format'}) {
1014                 # We loop over the known snapshot formats, checking for
1015                 # extensions. Allowed extensions are both the defined suffix
1016                 # (which includes the initial dot already) and the snapshot
1017                 # format key itself, with a prepended dot
1018                 while (my ($fmt, $opt) = each %known_snapshot_formats) {
1019                         my $hash = $refname;
1020                         unless ($hash =~ s/(\Q$opt->{'suffix'}\E|\Q.$fmt\E)$//) {
1021                                 next;
1022                         }
1023                         my $sfx = $1;
1024                         # a valid suffix was found, so set the snapshot format
1025                         # and reset the hash parameter
1026                         $input_params{'snapshot_format'} = $fmt;
1027                         $input_params{'hash'} = $hash;
1028                         # we also set the format suffix to the one requested
1029                         # in the URL: this way a request for e.g. .tgz returns
1030                         # a .tgz instead of a .tar.gz
1031                         $known_snapshot_formats{$fmt}{'suffix'} = $sfx;
1032                         last;
1033                 }
1034         }
1035 }
1036
1037 our ($action, $project, $file_name, $file_parent, $hash, $hash_parent, $hash_base,
1038      $hash_parent_base, @extra_options, $page, $searchtype, $search_use_regexp,
1039      $searchtext, $search_regexp, $project_filter);
1040 sub evaluate_and_validate_params {
1041         our $action = $input_params{'action'};
1042         if (defined $action) {
1043                 if (!is_valid_action($action)) {
1044                         die_error(400, "Invalid action parameter");
1045                 }
1046         }
1047
1048         # parameters which are pathnames
1049         our $project = $input_params{'project'};
1050         if (defined $project) {
1051                 if (!is_valid_project($project)) {
1052                         undef $project;
1053                         die_error(404, "No such project");
1054                 }
1055         }
1056
1057         our $project_filter = $input_params{'project_filter'};
1058         if (defined $project_filter) {
1059                 if (!is_valid_pathname($project_filter)) {
1060                         die_error(404, "Invalid project_filter parameter");
1061                 }
1062         }
1063
1064         our $file_name = $input_params{'file_name'};
1065         if (defined $file_name) {
1066                 if (!is_valid_pathname($file_name)) {
1067                         die_error(400, "Invalid file parameter");
1068                 }
1069         }
1070
1071         our $file_parent = $input_params{'file_parent'};
1072         if (defined $file_parent) {
1073                 if (!is_valid_pathname($file_parent)) {
1074                         die_error(400, "Invalid file parent parameter");
1075                 }
1076         }
1077
1078         # parameters which are refnames
1079         our $hash = $input_params{'hash'};
1080         if (defined $hash) {
1081                 if (!is_valid_refname($hash)) {
1082                         die_error(400, "Invalid hash parameter");
1083                 }
1084         }
1085
1086         our $hash_parent = $input_params{'hash_parent'};
1087         if (defined $hash_parent) {
1088                 if (!is_valid_refname($hash_parent)) {
1089                         die_error(400, "Invalid hash parent parameter");
1090                 }
1091         }
1092
1093         our $hash_base = $input_params{'hash_base'};
1094         if (defined $hash_base) {
1095                 if (!is_valid_refname($hash_base)) {
1096                         die_error(400, "Invalid hash base parameter");
1097                 }
1098         }
1099
1100         our @extra_options = @{$input_params{'extra_options'}};
1101         # @extra_options is always defined, since it can only be (currently) set from
1102         # CGI, and $cgi->param() returns the empty array in array context if the param
1103         # is not set
1104         foreach my $opt (@extra_options) {
1105                 if (not exists $allowed_options{$opt}) {
1106                         die_error(400, "Invalid option parameter");
1107                 }
1108                 if (not grep(/^$action$/, @{$allowed_options{$opt}})) {
1109                         die_error(400, "Invalid option parameter for this action");
1110                 }
1111         }
1112
1113         our $hash_parent_base = $input_params{'hash_parent_base'};
1114         if (defined $hash_parent_base) {
1115                 if (!is_valid_refname($hash_parent_base)) {
1116                         die_error(400, "Invalid hash parent base parameter");
1117                 }
1118         }
1119
1120         # other parameters
1121         our $page = $input_params{'page'};
1122         if (defined $page) {
1123                 if ($page =~ m/[^0-9]/) {
1124                         die_error(400, "Invalid page parameter");
1125                 }
1126         }
1127
1128         our $searchtype = $input_params{'searchtype'};
1129         if (defined $searchtype) {
1130                 if ($searchtype =~ m/[^a-z]/) {
1131                         die_error(400, "Invalid searchtype parameter");
1132                 }
1133         }
1134
1135         our $search_use_regexp = $input_params{'search_use_regexp'};
1136
1137         our $searchtext = $input_params{'searchtext'};
1138         our $search_regexp = undef;
1139         if (defined $searchtext) {
1140                 if (length($searchtext) < 2) {
1141                         die_error(403, "At least two characters are required for search parameter");
1142                 }
1143                 if ($search_use_regexp) {
1144                         $search_regexp = $searchtext;
1145                         if (!eval { qr/$search_regexp/; 1; }) {
1146                                 (my $error = $@) =~ s/ at \S+ line \d+.*\n?//;
1147                                 die_error(400, "Invalid search regexp '$search_regexp'",
1148                                           esc_html($error));
1149                         }
1150                 } else {
1151                         $search_regexp = quotemeta $searchtext;
1152                 }
1153         }
1154 }
1155
1156 # path to the current git repository
1157 our $git_dir;
1158 sub evaluate_git_dir {
1159         our $git_dir = "$projectroot/$project" if $project;
1160 }
1161
1162 our (@snapshot_fmts, $git_avatar, @extra_branch_refs);
1163 sub configure_gitweb_features {
1164         # list of supported snapshot formats
1165         our @snapshot_fmts = gitweb_get_feature('snapshot');
1166         @snapshot_fmts = filter_snapshot_fmts(@snapshot_fmts);
1167
1168         # check that the avatar feature is set to a known provider name,
1169         # and for each provider check if the dependencies are satisfied.
1170         # if the provider name is invalid or the dependencies are not met,
1171         # reset $git_avatar to the empty string.
1172         our ($git_avatar) = gitweb_get_feature('avatar');
1173         if ($git_avatar eq 'gravatar') {
1174                 $git_avatar = '' unless (eval { require Digest::MD5; 1; });
1175         } elsif ($git_avatar eq 'picon') {
1176                 # no dependencies
1177         } else {
1178                 $git_avatar = '';
1179         }
1180
1181         our @extra_branch_refs = gitweb_get_feature('extra-branch-refs');
1182         @extra_branch_refs = filter_and_validate_refs (@extra_branch_refs);
1183 }
1184
1185 sub get_branch_refs {
1186         return ('heads', @extra_branch_refs);
1187 }
1188
1189 # custom error handler: 'die <message>' is Internal Server Error
1190 sub handle_errors_html {
1191         my $msg = shift; # it is already HTML escaped
1192
1193         # to avoid infinite loop where error occurs in die_error,
1194         # change handler to default handler, disabling handle_errors_html
1195         set_message("Error occurred when inside die_error:\n$msg");
1196
1197         # you cannot jump out of die_error when called as error handler;
1198         # the subroutine set via CGI::Carp::set_message is called _after_
1199         # HTTP headers are already written, so it cannot write them itself
1200         die_error(undef, undef, $msg, -error_handler => 1, -no_http_header => 1);
1201 }
1202 set_message(\&handle_errors_html);
1203
1204 # dispatch
1205 sub dispatch {
1206         if (!defined $action) {
1207                 if (defined $hash) {
1208                         $action = git_get_type($hash);
1209                         $action or die_error(404, "Object does not exist");
1210                 } elsif (defined $hash_base && defined $file_name) {
1211                         $action = git_get_type("$hash_base:$file_name");
1212                         $action or die_error(404, "File or directory does not exist");
1213                 } elsif (defined $project) {
1214                         $action = 'summary';
1215                 } else {
1216                         $action = 'project_list';
1217                 }
1218         }
1219         if (!defined($actions{$action})) {
1220                 die_error(400, "Unknown action");
1221         }
1222         if ($action !~ m/^(?:opml|project_list|project_index)$/ &&
1223             !$project) {
1224                 die_error(400, "Project needed");
1225         }
1226         $actions{$action}->();
1227 }
1228
1229 sub reset_timer {
1230         our $t0 = [ gettimeofday() ]
1231                 if defined $t0;
1232         our $number_of_git_cmds = 0;
1233 }
1234
1235 our $first_request = 1;
1236 sub run_request {
1237         reset_timer();
1238
1239         evaluate_uri();
1240         if ($first_request) {
1241                 evaluate_gitweb_config();
1242                 evaluate_git_version();
1243         }
1244         if ($per_request_config) {
1245                 if (ref($per_request_config) eq 'CODE') {
1246                         $per_request_config->();
1247                 } elsif (!$first_request) {
1248                         evaluate_gitweb_config();
1249                 }
1250         }
1251         check_loadavg();
1252
1253         # $projectroot and $projects_list might be set in gitweb config file
1254         $projects_list ||= $projectroot;
1255
1256         evaluate_query_params();
1257         evaluate_path_info();
1258         evaluate_and_validate_params();
1259         evaluate_git_dir();
1260
1261         configure_gitweb_features();
1262
1263         dispatch();
1264 }
1265
1266 our $is_last_request = sub { 1 };
1267 our ($pre_dispatch_hook, $post_dispatch_hook, $pre_listen_hook);
1268 our $CGI = 'CGI';
1269 our $cgi;
1270 sub configure_as_fcgi {
1271         require CGI::Fast;
1272         our $CGI = 'CGI::Fast';
1273
1274         my $request_number = 0;
1275         # let each child service 100 requests
1276         our $is_last_request = sub { ++$request_number > 100 };
1277 }
1278 sub evaluate_argv {
1279         my $script_name = $ENV{'SCRIPT_NAME'} || $ENV{'SCRIPT_FILENAME'} || __FILE__;
1280         configure_as_fcgi()
1281                 if $script_name =~ /\.fcgi$/;
1282
1283         return unless (@ARGV);
1284
1285         require Getopt::Long;
1286         Getopt::Long::GetOptions(
1287                 'fastcgi|fcgi|f' => \&configure_as_fcgi,
1288                 'nproc|n=i' => sub {
1289                         my ($arg, $val) = @_;
1290                         return unless eval { require FCGI::ProcManager; 1; };
1291                         my $proc_manager = FCGI::ProcManager->new({
1292                                 n_processes => $val,
1293                         });
1294                         our $pre_listen_hook    = sub { $proc_manager->pm_manage()        };
1295                         our $pre_dispatch_hook  = sub { $proc_manager->pm_pre_dispatch()  };
1296                         our $post_dispatch_hook = sub { $proc_manager->pm_post_dispatch() };
1297                 },
1298         );
1299 }
1300
1301 sub run {
1302         evaluate_argv();
1303
1304         $first_request = 1;
1305         $pre_listen_hook->()
1306                 if $pre_listen_hook;
1307
1308  REQUEST:
1309         while ($cgi = $CGI->new()) {
1310                 $pre_dispatch_hook->()
1311                         if $pre_dispatch_hook;
1312
1313                 run_request();
1314
1315                 $post_dispatch_hook->()
1316                         if $post_dispatch_hook;
1317                 $first_request = 0;
1318
1319                 last REQUEST if ($is_last_request->());
1320         }
1321
1322  DONE_GITWEB:
1323         1;
1324 }
1325
1326 run();
1327
1328 if (defined caller) {
1329         # wrapped in a subroutine processing requests,
1330         # e.g. mod_perl with ModPerl::Registry, or PSGI with Plack::App::WrapCGI
1331         return;
1332 } else {
1333         # pure CGI script, serving single request
1334         exit;
1335 }
1336
1337 ## ======================================================================
1338 ## action links
1339
1340 # possible values of extra options
1341 # -full => 0|1      - use absolute/full URL ($my_uri/$my_url as base)
1342 # -replay => 1      - start from a current view (replay with modifications)
1343 # -path_info => 0|1 - don't use/use path_info URL (if possible)
1344 # -anchor => ANCHOR - add #ANCHOR to end of URL, implies -replay if used alone
1345 sub href {
1346         my %params = @_;
1347         # default is to use -absolute url() i.e. $my_uri
1348         my $href = $params{-full} ? $my_url : $my_uri;
1349
1350         # implicit -replay, must be first of implicit params
1351         $params{-replay} = 1 if (keys %params == 1 && $params{-anchor});
1352
1353         $params{'project'} = $project unless exists $params{'project'};
1354
1355         if ($params{-replay}) {
1356                 while (my ($name, $symbol) = each %cgi_param_mapping) {
1357                         if (!exists $params{$name}) {
1358                                 $params{$name} = $input_params{$name};
1359                         }
1360                 }
1361         }
1362
1363         my $use_pathinfo = gitweb_check_feature('pathinfo');
1364         if (defined $params{'project'} &&
1365             (exists $params{-path_info} ? $params{-path_info} : $use_pathinfo)) {
1366                 # try to put as many parameters as possible in PATH_INFO:
1367                 #   - project name
1368                 #   - action
1369                 #   - hash_parent or hash_parent_base:/file_parent
1370                 #   - hash or hash_base:/filename
1371                 #   - the snapshot_format as an appropriate suffix
1372
1373                 # When the script is the root DirectoryIndex for the domain,
1374                 # $href here would be something like http://gitweb.example.com/
1375                 # Thus, we strip any trailing / from $href, to spare us double
1376                 # slashes in the final URL
1377                 $href =~ s,/$,,;
1378
1379                 # Then add the project name, if present
1380                 $href .= "/".esc_path_info($params{'project'});
1381                 delete $params{'project'};
1382
1383                 # since we destructively absorb parameters, we keep this
1384                 # boolean that remembers if we're handling a snapshot
1385                 my $is_snapshot = $params{'action'} eq 'snapshot';
1386
1387                 # Summary just uses the project path URL, any other action is
1388                 # added to the URL
1389                 if (defined $params{'action'}) {
1390                         $href .= "/".esc_path_info($params{'action'})
1391                                 unless $params{'action'} eq 'summary';
1392                         delete $params{'action'};
1393                 }
1394
1395                 # Next, we put hash_parent_base:/file_parent..hash_base:/file_name,
1396                 # stripping nonexistent or useless pieces
1397                 $href .= "/" if ($params{'hash_base'} || $params{'hash_parent_base'}
1398                         || $params{'hash_parent'} || $params{'hash'});
1399                 if (defined $params{'hash_base'}) {
1400                         if (defined $params{'hash_parent_base'}) {
1401                                 $href .= esc_path_info($params{'hash_parent_base'});
1402                                 # skip the file_parent if it's the same as the file_name
1403                                 if (defined $params{'file_parent'}) {
1404                                         if (defined $params{'file_name'} && $params{'file_parent'} eq $params{'file_name'}) {
1405                                                 delete $params{'file_parent'};
1406                                         } elsif ($params{'file_parent'} !~ /\.\./) {
1407                                                 $href .= ":/".esc_path_info($params{'file_parent'});
1408                                                 delete $params{'file_parent'};
1409                                         }
1410                                 }
1411                                 $href .= "..";
1412                                 delete $params{'hash_parent'};
1413                                 delete $params{'hash_parent_base'};
1414                         } elsif (defined $params{'hash_parent'}) {
1415                                 $href .= esc_path_info($params{'hash_parent'}). "..";
1416                                 delete $params{'hash_parent'};
1417                         }
1418
1419                         $href .= esc_path_info($params{'hash_base'});
1420                         if (defined $params{'file_name'} && $params{'file_name'} !~ /\.\./) {
1421                                 $href .= ":/".esc_path_info($params{'file_name'});
1422                                 delete $params{'file_name'};
1423                         }
1424                         delete $params{'hash'};
1425                         delete $params{'hash_base'};
1426                 } elsif (defined $params{'hash'}) {
1427                         $href .= esc_path_info($params{'hash'});
1428                         delete $params{'hash'};
1429                 }
1430
1431                 # If the action was a snapshot, we can absorb the
1432                 # snapshot_format parameter too
1433                 if ($is_snapshot) {
1434                         my $fmt = $params{'snapshot_format'};
1435                         # snapshot_format should always be defined when href()
1436                         # is called, but just in case some code forgets, we
1437                         # fall back to the default
1438                         $fmt ||= $snapshot_fmts[0];
1439                         $href .= $known_snapshot_formats{$fmt}{'suffix'};
1440                         delete $params{'snapshot_format'};
1441                 }
1442         }
1443
1444         # now encode the parameters explicitly
1445         my @result = ();
1446         for (my $i = 0; $i < @cgi_param_mapping; $i += 2) {
1447                 my ($name, $symbol) = ($cgi_param_mapping[$i], $cgi_param_mapping[$i+1]);
1448                 if (defined $params{$name}) {
1449                         if (ref($params{$name}) eq "ARRAY") {
1450                                 foreach my $par (@{$params{$name}}) {
1451                                         push @result, $symbol . "=" . esc_param($par);
1452                                 }
1453                         } else {
1454                                 push @result, $symbol . "=" . esc_param($params{$name});
1455                         }
1456                 }
1457         }
1458         $href .= "?" . join(';', @result) if scalar @result;
1459
1460         # final transformation: trailing spaces must be escaped (URI-encoded)
1461         $href =~ s/(\s+)$/CGI::escape($1)/e;
1462
1463         if ($params{-anchor}) {
1464                 $href .= "#".esc_param($params{-anchor});
1465         }
1466
1467         return $href;
1468 }
1469
1470
1471 ## ======================================================================
1472 ## validation, quoting/unquoting and escaping
1473
1474 sub is_valid_action {
1475         my $input = shift;
1476         return undef unless exists $actions{$input};
1477         return 1;
1478 }
1479
1480 sub is_valid_project {
1481         my $input = shift;
1482
1483         return unless defined $input;
1484         if (!is_valid_pathname($input) ||
1485                 !(-d "$projectroot/$input") ||
1486                 !check_export_ok("$projectroot/$input") ||
1487                 ($strict_export && !project_in_list($input))) {
1488                 return undef;
1489         } else {
1490                 return 1;
1491         }
1492 }
1493
1494 sub is_valid_pathname {
1495         my $input = shift;
1496
1497         return undef unless defined $input;
1498         # no '.' or '..' as elements of path, i.e. no '.' or '..'
1499         # at the beginning, at the end, and between slashes.
1500         # also this catches doubled slashes
1501         if ($input =~ m!(^|/)(|\.|\.\.)(/|$)!) {
1502                 return undef;
1503         }
1504         # no null characters
1505         if ($input =~ m!\0!) {
1506                 return undef;
1507         }
1508         return 1;
1509 }
1510
1511 sub is_valid_ref_format {
1512         my $input = shift;
1513
1514         return undef unless defined $input;
1515         # restrictions on ref name according to git-check-ref-format
1516         if ($input =~ m!(/\.|\.\.|[\000-\040\177 ~^:?*\[]|/$)!) {
1517                 return undef;
1518         }
1519         return 1;
1520 }
1521
1522 sub is_valid_refname {
1523         my $input = shift;
1524
1525         return undef unless defined $input;
1526         # textual hashes are O.K.
1527         if ($input =~ m/^[0-9a-fA-F]{40}$/) {
1528                 return 1;
1529         }
1530         # it must be correct pathname
1531         is_valid_pathname($input) or return undef;
1532         # check git-check-ref-format restrictions
1533         is_valid_ref_format($input) or return undef;
1534         return 1;
1535 }
1536
1537 # decode sequences of octets in utf8 into Perl's internal form,
1538 # which is utf-8 with utf8 flag set if needed.  gitweb writes out
1539 # in utf-8 thanks to "binmode STDOUT, ':utf8'" at beginning
1540 sub to_utf8 {
1541         my $str = shift;
1542         return undef unless defined $str;
1543
1544         if (utf8::is_utf8($str) || utf8::decode($str)) {
1545                 return $str;
1546         } else {
1547                 return decode($fallback_encoding, $str, Encode::FB_DEFAULT);
1548         }
1549 }
1550
1551 # quote unsafe chars, but keep the slash, even when it's not
1552 # correct, but quoted slashes look too horrible in bookmarks
1553 sub esc_param {
1554         my $str = shift;
1555         return undef unless defined $str;
1556         $str =~ s/([^A-Za-z0-9\-_.~()\/:@ ]+)/CGI::escape($1)/eg;
1557         $str =~ s/ /\+/g;
1558         return $str;
1559 }
1560
1561 # the quoting rules for path_info fragment are slightly different
1562 sub esc_path_info {
1563         my $str = shift;
1564         return undef unless defined $str;
1565
1566         # path_info doesn't treat '+' as space (specially), but '?' must be escaped
1567         $str =~ s/([^A-Za-z0-9\-_.~();\/;:@&= +]+)/CGI::escape($1)/eg;
1568
1569         return $str;
1570 }
1571
1572 # quote unsafe chars in whole URL, so some characters cannot be quoted
1573 sub esc_url {
1574         my $str = shift;
1575         return undef unless defined $str;
1576         $str =~ s/([^A-Za-z0-9\-_.~();\/;?:@&= ]+)/CGI::escape($1)/eg;
1577         $str =~ s/ /\+/g;
1578         return $str;
1579 }
1580
1581 # quote unsafe characters in HTML attributes
1582 sub esc_attr {
1583
1584         # for XHTML conformance escaping '"' to '&quot;' is not enough
1585         return esc_html(@_);
1586 }
1587
1588 # replace invalid utf8 character with SUBSTITUTION sequence
1589 sub esc_html {
1590         my $str = shift;
1591         my %opts = @_;
1592
1593         return undef unless defined $str;
1594
1595         $str = to_utf8($str);
1596         $str = $cgi->escapeHTML($str);
1597         if ($opts{'-nbsp'}) {
1598                 $str =~ s/ /&nbsp;/g;
1599         }
1600         $str =~ s|([[:cntrl:]])|(($1 ne "\t") ? quot_cec($1) : $1)|eg;
1601         return $str;
1602 }
1603
1604 # quote control characters and escape filename to HTML
1605 sub esc_path {
1606         my $str = shift;
1607         my %opts = @_;
1608
1609         return undef unless defined $str;
1610
1611         $str = to_utf8($str);
1612         $str = $cgi->escapeHTML($str);
1613         if ($opts{'-nbsp'}) {
1614                 $str =~ s/ /&nbsp;/g;
1615         }
1616         $str =~ s|([[:cntrl:]])|quot_cec($1)|eg;
1617         return $str;
1618 }
1619
1620 # Sanitize for use in XHTML + application/xml+xhtml (valid XML 1.0)
1621 sub sanitize {
1622         my $str = shift;
1623
1624         return undef unless defined $str;
1625
1626         $str = to_utf8($str);
1627         $str =~ s|([[:cntrl:]])|(index("\t\n\r", $1) != -1 ? $1 : quot_cec($1))|eg;
1628         return $str;
1629 }
1630
1631 # Make control characters "printable", using character escape codes (CEC)
1632 sub quot_cec {
1633         my $cntrl = shift;
1634         my %opts = @_;
1635         my %es = ( # character escape codes, aka escape sequences
1636                 "\t" => '\t',   # tab            (HT)
1637                 "\n" => '\n',   # line feed      (LF)
1638                 "\r" => '\r',   # carrige return (CR)
1639                 "\f" => '\f',   # form feed      (FF)
1640                 "\b" => '\b',   # backspace      (BS)
1641                 "\a" => '\a',   # alarm (bell)   (BEL)
1642                 "\e" => '\e',   # escape         (ESC)
1643                 "\013" => '\v', # vertical tab   (VT)
1644                 "\000" => '\0', # nul character  (NUL)
1645         );
1646         my $chr = ( (exists $es{$cntrl})
1647                     ? $es{$cntrl}
1648                     : sprintf('\%2x', ord($cntrl)) );
1649         if ($opts{-nohtml}) {
1650                 return $chr;
1651         } else {
1652                 return "<span class=\"cntrl\">$chr</span>";
1653         }
1654 }
1655
1656 # Alternatively use unicode control pictures codepoints,
1657 # Unicode "printable representation" (PR)
1658 sub quot_upr {
1659         my $cntrl = shift;
1660         my %opts = @_;
1661
1662         my $chr = sprintf('&#%04d;', 0x2400+ord($cntrl));
1663         if ($opts{-nohtml}) {
1664                 return $chr;
1665         } else {
1666                 return "<span class=\"cntrl\">$chr</span>";
1667         }
1668 }
1669
1670 # git may return quoted and escaped filenames
1671 sub unquote {
1672         my $str = shift;
1673
1674         sub unq {
1675                 my $seq = shift;
1676                 my %es = ( # character escape codes, aka escape sequences
1677                         't' => "\t",   # tab            (HT, TAB)
1678                         'n' => "\n",   # newline        (NL)
1679                         'r' => "\r",   # return         (CR)
1680                         'f' => "\f",   # form feed      (FF)
1681                         'b' => "\b",   # backspace      (BS)
1682                         'a' => "\a",   # alarm (bell)   (BEL)
1683                         'e' => "\e",   # escape         (ESC)
1684                         'v' => "\013", # vertical tab   (VT)
1685                 );
1686
1687                 if ($seq =~ m/^[0-7]{1,3}$/) {
1688                         # octal char sequence
1689                         return chr(oct($seq));
1690                 } elsif (exists $es{$seq}) {
1691                         # C escape sequence, aka character escape code
1692                         return $es{$seq};
1693                 }
1694                 # quoted ordinary character
1695                 return $seq;
1696         }
1697
1698         if ($str =~ m/^"(.*)"$/) {
1699                 # needs unquoting
1700                 $str = $1;
1701                 $str =~ s/\\([^0-7]|[0-7]{1,3})/unq($1)/eg;
1702         }
1703         return $str;
1704 }
1705
1706 # escape tabs (convert tabs to spaces)
1707 sub untabify {
1708         my $line = shift;
1709
1710         while ((my $pos = index($line, "\t")) != -1) {
1711                 if (my $count = (8 - ($pos % 8))) {
1712                         my $spaces = ' ' x $count;
1713                         $line =~ s/\t/$spaces/;
1714                 }
1715         }
1716
1717         return $line;
1718 }
1719
1720 sub project_in_list {
1721         my $project = shift;
1722         my @list = git_get_projects_list();
1723         return @list && scalar(grep { $_->{'path'} eq $project } @list);
1724 }
1725
1726 ## ----------------------------------------------------------------------
1727 ## HTML aware string manipulation
1728
1729 # Try to chop given string on a word boundary between position
1730 # $len and $len+$add_len. If there is no word boundary there,
1731 # chop at $len+$add_len. Do not chop if chopped part plus ellipsis
1732 # (marking chopped part) would be longer than given string.
1733 sub chop_str {
1734         my $str = shift;
1735         my $len = shift;
1736         my $add_len = shift || 10;
1737         my $where = shift || 'right'; # 'left' | 'center' | 'right'
1738
1739         # Make sure perl knows it is utf8 encoded so we don't
1740         # cut in the middle of a utf8 multibyte char.
1741         $str = to_utf8($str);
1742
1743         # allow only $len chars, but don't cut a word if it would fit in $add_len
1744         # if it doesn't fit, cut it if it's still longer than the dots we would add
1745         # remove chopped character entities entirely
1746
1747         # when chopping in the middle, distribute $len into left and right part
1748         # return early if chopping wouldn't make string shorter
1749         if ($where eq 'center') {
1750                 return $str if ($len + 5 >= length($str)); # filler is length 5
1751                 $len = int($len/2);
1752         } else {
1753                 return $str if ($len + 4 >= length($str)); # filler is length 4
1754         }
1755
1756         # regexps: ending and beginning with word part up to $add_len
1757         my $endre = qr/.{$len}\w{0,$add_len}/;
1758         my $begre = qr/\w{0,$add_len}.{$len}/;
1759
1760         if ($where eq 'left') {
1761                 $str =~ m/^(.*?)($begre)$/;
1762                 my ($lead, $body) = ($1, $2);
1763                 if (length($lead) > 4) {
1764                         $lead = " ...";
1765                 }
1766                 return "$lead$body";
1767
1768         } elsif ($where eq 'center') {
1769                 $str =~ m/^($endre)(.*)$/;
1770                 my ($left, $str)  = ($1, $2);
1771                 $str =~ m/^(.*?)($begre)$/;
1772                 my ($mid, $right) = ($1, $2);
1773                 if (length($mid) > 5) {
1774                         $mid = " ... ";
1775                 }
1776                 return "$left$mid$right";
1777
1778         } else {
1779                 $str =~ m/^($endre)(.*)$/;
1780                 my $body = $1;
1781                 my $tail = $2;
1782                 if (length($tail) > 4) {
1783                         $tail = "... ";
1784                 }
1785                 return "$body$tail";
1786         }
1787 }
1788
1789 # takes the same arguments as chop_str, but also wraps a <span> around the
1790 # result with a title attribute if it does get chopped. Additionally, the
1791 # string is HTML-escaped.
1792 sub chop_and_escape_str {
1793         my ($str) = @_;
1794
1795         my $chopped = chop_str(@_);
1796         $str = to_utf8($str);
1797         if ($chopped eq $str) {
1798                 return esc_html($chopped);
1799         } else {
1800                 $str =~ s/[[:cntrl:]]/?/g;
1801                 return $cgi->span({-title=>$str}, esc_html($chopped));
1802         }
1803 }
1804
1805 # Highlight selected fragments of string, using given CSS class,
1806 # and escape HTML.  It is assumed that fragments do not overlap.
1807 # Regions are passed as list of pairs (array references).
1808 #
1809 # Example: esc_html_hl_regions("foobar", "mark", [ 0, 3 ]) returns
1810 # '<span class="mark">foo</span>bar'
1811 sub esc_html_hl_regions {
1812         my ($str, $css_class, @sel) = @_;
1813         my %opts = grep { ref($_) ne 'ARRAY' } @sel;
1814         @sel     = grep { ref($_) eq 'ARRAY' } @sel;
1815         return esc_html($str, %opts) unless @sel;
1816
1817         my $out = '';
1818         my $pos = 0;
1819
1820         for my $s (@sel) {
1821                 my ($begin, $end) = @$s;
1822
1823                 # Don't create empty <span> elements.
1824                 next if $end <= $begin;
1825
1826                 my $escaped = esc_html(substr($str, $begin, $end - $begin),
1827                                        %opts);
1828
1829                 $out .= esc_html(substr($str, $pos, $begin - $pos), %opts)
1830                         if ($begin - $pos > 0);
1831                 $out .= $cgi->span({-class => $css_class}, $escaped);
1832
1833                 $pos = $end;
1834         }
1835         $out .= esc_html(substr($str, $pos), %opts)
1836                 if ($pos < length($str));
1837
1838         return $out;
1839 }
1840
1841 # return positions of beginning and end of each match
1842 sub matchpos_list {
1843         my ($str, $regexp) = @_;
1844         return unless (defined $str && defined $regexp);
1845
1846         my @matches;
1847         while ($str =~ /$regexp/g) {
1848                 push @matches, [$-[0], $+[0]];
1849         }
1850         return @matches;
1851 }
1852
1853 # highlight match (if any), and escape HTML
1854 sub esc_html_match_hl {
1855         my ($str, $regexp) = @_;
1856         return esc_html($str) unless defined $regexp;
1857
1858         my @matches = matchpos_list($str, $regexp);
1859         return esc_html($str) unless @matches;
1860
1861         return esc_html_hl_regions($str, 'match', @matches);
1862 }
1863
1864
1865 # highlight match (if any) of shortened string, and escape HTML
1866 sub esc_html_match_hl_chopped {
1867         my ($str, $chopped, $regexp) = @_;
1868         return esc_html_match_hl($str, $regexp) unless defined $chopped;
1869
1870         my @matches = matchpos_list($str, $regexp);
1871         return esc_html($chopped) unless @matches;
1872
1873         # filter matches so that we mark chopped string
1874         my $tail = "... "; # see chop_str
1875         unless ($chopped =~ s/\Q$tail\E$//) {
1876                 $tail = '';
1877         }
1878         my $chop_len = length($chopped);
1879         my $tail_len = length($tail);
1880         my @filtered;
1881
1882         for my $m (@matches) {
1883                 if ($m->[0] > $chop_len) {
1884                         push @filtered, [ $chop_len, $chop_len + $tail_len ] if ($tail_len > 0);
1885                         last;
1886                 } elsif ($m->[1] > $chop_len) {
1887                         push @filtered, [ $m->[0], $chop_len + $tail_len ];
1888                         last;
1889                 }
1890                 push @filtered, $m;
1891         }
1892
1893         return esc_html_hl_regions($chopped . $tail, 'match', @filtered);
1894 }
1895
1896 ## ----------------------------------------------------------------------
1897 ## functions returning short strings
1898
1899 # CSS class for given age value (in seconds)
1900 sub age_class {
1901         my $age = shift;
1902
1903         if (!defined $age) {
1904                 return "noage";
1905         } elsif ($age < 60*60*2) {
1906                 return "age0";
1907         } elsif ($age < 60*60*24*2) {
1908                 return "age1";
1909         } else {
1910                 return "age2";
1911         }
1912 }
1913
1914 # convert age in seconds to "nn units ago" string
1915 sub age_string {
1916         my $age = shift;
1917         my $age_str;
1918
1919         if ($age > 60*60*24*365*2) {
1920                 $age_str = (int $age/60/60/24/365);
1921                 $age_str .= " years ago";
1922         } elsif ($age > 60*60*24*(365/12)*2) {
1923                 $age_str = int $age/60/60/24/(365/12);
1924                 $age_str .= " months ago";
1925         } elsif ($age > 60*60*24*7*2) {
1926                 $age_str = int $age/60/60/24/7;
1927                 $age_str .= " weeks ago";
1928         } elsif ($age > 60*60*24*2) {
1929                 $age_str = int $age/60/60/24;
1930                 $age_str .= " days ago";
1931         } elsif ($age > 60*60*2) {
1932                 $age_str = int $age/60/60;
1933                 $age_str .= " hours ago";
1934         } elsif ($age > 60*2) {
1935                 $age_str = int $age/60;
1936                 $age_str .= " min ago";
1937         } elsif ($age > 2) {
1938                 $age_str = int $age;
1939                 $age_str .= " sec ago";
1940         } else {
1941                 $age_str .= " right now";
1942         }
1943         return $age_str;
1944 }
1945
1946 use constant {
1947         S_IFINVALID => 0030000,
1948         S_IFGITLINK => 0160000,
1949 };
1950
1951 # submodule/subproject, a commit object reference
1952 sub S_ISGITLINK {
1953         my $mode = shift;
1954
1955         return (($mode & S_IFMT) == S_IFGITLINK)
1956 }
1957
1958 # convert file mode in octal to symbolic file mode string
1959 sub mode_str {
1960         my $mode = oct shift;
1961
1962         if (S_ISGITLINK($mode)) {
1963                 return 'm---------';
1964         } elsif (S_ISDIR($mode & S_IFMT)) {
1965                 return 'drwxr-xr-x';
1966         } elsif (S_ISLNK($mode)) {
1967                 return 'lrwxrwxrwx';
1968         } elsif (S_ISREG($mode)) {
1969                 # git cares only about the executable bit
1970                 if ($mode & S_IXUSR) {
1971                         return '-rwxr-xr-x';
1972                 } else {
1973                         return '-rw-r--r--';
1974                 };
1975         } else {
1976                 return '----------';
1977         }
1978 }
1979
1980 # convert file mode in octal to file type string
1981 sub file_type {
1982         my $mode = shift;
1983
1984         if ($mode !~ m/^[0-7]+$/) {
1985                 return $mode;
1986         } else {
1987                 $mode = oct $mode;
1988         }
1989
1990         if (S_ISGITLINK($mode)) {
1991                 return "submodule";
1992         } elsif (S_ISDIR($mode & S_IFMT)) {
1993                 return "directory";
1994         } elsif (S_ISLNK($mode)) {
1995                 return "symlink";
1996         } elsif (S_ISREG($mode)) {
1997                 return "file";
1998         } else {
1999                 return "unknown";
2000         }
2001 }
2002
2003 # convert file mode in octal to file type description string
2004 sub file_type_long {
2005         my $mode = shift;
2006
2007         if ($mode !~ m/^[0-7]+$/) {
2008                 return $mode;
2009         } else {
2010                 $mode = oct $mode;
2011         }
2012
2013         if (S_ISGITLINK($mode)) {
2014                 return "submodule";
2015         } elsif (S_ISDIR($mode & S_IFMT)) {
2016                 return "directory";
2017         } elsif (S_ISLNK($mode)) {
2018                 return "symlink";
2019         } elsif (S_ISREG($mode)) {
2020                 if ($mode & S_IXUSR) {
2021                         return "executable";
2022                 } else {
2023                         return "file";
2024                 };
2025         } else {
2026                 return "unknown";
2027         }
2028 }
2029
2030
2031 ## ----------------------------------------------------------------------
2032 ## functions returning short HTML fragments, or transforming HTML fragments
2033 ## which don't belong to other sections
2034
2035 # format line of commit message.
2036 sub format_log_line_html {
2037         my $line = shift;
2038
2039         $line = esc_html($line, -nbsp=>1);
2040         $line =~ s{
2041         \b
2042         (
2043             # The output of "git describe", e.g. v2.10.0-297-gf6727b0
2044             # or hadoop-20160921-113441-20-g094fb7d
2045             (?<!-) # see strbuf_check_tag_ref(). Tags can't start with -
2046             [A-Za-z0-9.-]+
2047             (?!\.) # refs can't end with ".", see check_refname_format()
2048             -g[0-9a-fA-F]{7,40}
2049             |
2050             # Just a normal looking Git SHA1
2051             [0-9a-fA-F]{7,40}
2052         )
2053         \b
2054     }{
2055                 $cgi->a({-href => href(action=>"object", hash=>$1),
2056                                         -class => "text"}, $1);
2057         }egx;
2058
2059         return $line;
2060 }
2061
2062 # format marker of refs pointing to given object
2063
2064 # the destination action is chosen based on object type and current context:
2065 # - for annotated tags, we choose the tag view unless it's the current view
2066 #   already, in which case we go to shortlog view
2067 # - for other refs, we keep the current view if we're in history, shortlog or
2068 #   log view, and select shortlog otherwise
2069 sub format_ref_marker {
2070         my ($refs, $id) = @_;
2071         my $markers = '';
2072
2073         if (defined $refs->{$id}) {
2074                 foreach my $ref (@{$refs->{$id}}) {
2075                         # this code exploits the fact that non-lightweight tags are the
2076                         # only indirect objects, and that they are the only objects for which
2077                         # we want to use tag instead of shortlog as action
2078                         my ($type, $name) = qw();
2079                         my $indirect = ($ref =~ s/\^\{\}$//);
2080                         # e.g. tags/v2.6.11 or heads/next
2081                         if ($ref =~ m!^(.*?)s?/(.*)$!) {
2082                                 $type = $1;
2083                                 $name = $2;
2084                         } else {
2085                                 $type = "ref";
2086                                 $name = $ref;
2087                         }
2088
2089                         my $class = $type;
2090                         $class .= " indirect" if $indirect;
2091
2092                         my $dest_action = "shortlog";
2093
2094                         if ($indirect) {
2095                                 $dest_action = "tag" unless $action eq "tag";
2096                         } elsif ($action =~ /^(history|(short)?log)$/) {
2097                                 $dest_action = $action;
2098                         }
2099
2100                         my $dest = "";
2101                         $dest .= "refs/" unless $ref =~ m!^refs/!;
2102                         $dest .= $ref;
2103
2104                         my $link = $cgi->a({
2105                                 -href => href(
2106                                         action=>$dest_action,
2107                                         hash=>$dest
2108                                 )}, esc_html($name));
2109
2110                         $markers .= " <span class=\"".esc_attr($class)."\" title=\"".esc_attr($ref)."\">" .
2111                                 $link . "</span>";
2112                 }
2113         }
2114
2115         if ($markers) {
2116                 return ' <span class="refs">'. $markers . '</span>';
2117         } else {
2118                 return "";
2119         }
2120 }
2121
2122 # format, perhaps shortened and with markers, title line
2123 sub format_subject_html {
2124         my ($long, $short, $href, $extra) = @_;
2125         $extra = '' unless defined($extra);
2126
2127         if (length($short) < length($long)) {
2128                 $long =~ s/[[:cntrl:]]/?/g;
2129                 return $cgi->a({-href => $href, -class => "list subject",
2130                                 -title => to_utf8($long)},
2131                        esc_html($short)) . $extra;
2132         } else {
2133                 return $cgi->a({-href => $href, -class => "list subject"},
2134                        esc_html($long)) . $extra;
2135         }
2136 }
2137
2138 # Rather than recomputing the url for an email multiple times, we cache it
2139 # after the first hit. This gives a visible benefit in views where the avatar
2140 # for the same email is used repeatedly (e.g. shortlog).
2141 # The cache is shared by all avatar engines (currently gravatar only), which
2142 # are free to use it as preferred. Since only one avatar engine is used for any
2143 # given page, there's no risk for cache conflicts.
2144 our %avatar_cache = ();
2145
2146 # Compute the picon url for a given email, by using the picon search service over at
2147 # http://www.cs.indiana.edu/picons/search.html
2148 sub picon_url {
2149         my $email = lc shift;
2150         if (!$avatar_cache{$email}) {
2151                 my ($user, $domain) = split('@', $email);
2152                 $avatar_cache{$email} =
2153                         "//www.cs.indiana.edu/cgi-pub/kinzler/piconsearch.cgi/" .
2154                         "$domain/$user/" .
2155                         "users+domains+unknown/up/single";
2156         }
2157         return $avatar_cache{$email};
2158 }
2159
2160 # Compute the gravatar url for a given email, if it's not in the cache already.
2161 # Gravatar stores only the part of the URL before the size, since that's the
2162 # one computationally more expensive. This also allows reuse of the cache for
2163 # different sizes (for this particular engine).
2164 sub gravatar_url {
2165         my $email = lc shift;
2166         my $size = shift;
2167         $avatar_cache{$email} ||=
2168                 "//www.gravatar.com/avatar/" .
2169                         Digest::MD5::md5_hex($email) . "?s=";
2170         return $avatar_cache{$email} . $size;
2171 }
2172
2173 # Insert an avatar for the given $email at the given $size if the feature
2174 # is enabled.
2175 sub git_get_avatar {
2176         my ($email, %opts) = @_;
2177         my $pre_white  = ($opts{-pad_before} ? "&nbsp;" : "");
2178         my $post_white = ($opts{-pad_after}  ? "&nbsp;" : "");
2179         $opts{-size} ||= 'default';
2180         my $size = $avatar_size{$opts{-size}} || $avatar_size{'default'};
2181         my $url = "";
2182         if ($git_avatar eq 'gravatar') {
2183                 $url = gravatar_url($email, $size);
2184         } elsif ($git_avatar eq 'picon') {
2185                 $url = picon_url($email);
2186         }
2187         # Other providers can be added by extending the if chain, defining $url
2188         # as needed. If no variant puts something in $url, we assume avatars
2189         # are completely disabled/unavailable.
2190         if ($url) {
2191                 return $pre_white .
2192                        "<img width=\"$size\" " .
2193                             "class=\"avatar\" " .
2194                             "src=\"".esc_url($url)."\" " .
2195                             "alt=\"\" " .
2196                        "/>" . $post_white;
2197         } else {
2198                 return "";
2199         }
2200 }
2201
2202 sub format_search_author {
2203         my ($author, $searchtype, $displaytext) = @_;
2204         my $have_search = gitweb_check_feature('search');
2205
2206         if ($have_search) {
2207                 my $performed = "";
2208                 if ($searchtype eq 'author') {
2209                         $performed = "authored";
2210                 } elsif ($searchtype eq 'committer') {
2211                         $performed = "committed";
2212                 }
2213
2214                 return $cgi->a({-href => href(action=>"search", hash=>$hash,
2215                                 searchtext=>$author,
2216                                 searchtype=>$searchtype), class=>"list",
2217                                 title=>"Search for commits $performed by $author"},
2218                                 $displaytext);
2219
2220         } else {
2221                 return $displaytext;
2222         }
2223 }
2224
2225 # format the author name of the given commit with the given tag
2226 # the author name is chopped and escaped according to the other
2227 # optional parameters (see chop_str).
2228 sub format_author_html {
2229         my $tag = shift;
2230         my $co = shift;
2231         my $author = chop_and_escape_str($co->{'author_name'}, @_);
2232         return "<$tag class=\"author\">" .
2233                format_search_author($co->{'author_name'}, "author",
2234                        git_get_avatar($co->{'author_email'}, -pad_after => 1) .
2235                        $author) .
2236                "</$tag>";
2237 }
2238
2239 # format git diff header line, i.e. "diff --(git|combined|cc) ..."
2240 sub format_git_diff_header_line {
2241         my $line = shift;
2242         my $diffinfo = shift;
2243         my ($from, $to) = @_;
2244
2245         if ($diffinfo->{'nparents'}) {
2246                 # combined diff
2247                 $line =~ s!^(diff (.*?) )"?.*$!$1!;
2248                 if ($to->{'href'}) {
2249                         $line .= $cgi->a({-href => $to->{'href'}, -class => "path"},
2250                                          esc_path($to->{'file'}));
2251                 } else { # file was deleted (no href)
2252                         $line .= esc_path($to->{'file'});
2253                 }
2254         } else {
2255                 # "ordinary" diff
2256                 $line =~ s!^(diff (.*?) )"?a/.*$!$1!;
2257                 if ($from->{'href'}) {
2258                         $line .= $cgi->a({-href => $from->{'href'}, -class => "path"},
2259                                          'a/' . esc_path($from->{'file'}));
2260                 } else { # file was added (no href)
2261                         $line .= 'a/' . esc_path($from->{'file'});
2262                 }
2263                 $line .= ' ';
2264                 if ($to->{'href'}) {
2265                         $line .= $cgi->a({-href => $to->{'href'}, -class => "path"},
2266                                          'b/' . esc_path($to->{'file'}));
2267                 } else { # file was deleted
2268                         $line .= 'b/' . esc_path($to->{'file'});
2269                 }
2270         }
2271
2272         return "<div class=\"diff header\">$line</div>\n";
2273 }
2274
2275 # format extended diff header line, before patch itself
2276 sub format_extended_diff_header_line {
2277         my $line = shift;
2278         my $diffinfo = shift;
2279         my ($from, $to) = @_;
2280
2281         # match <path>
2282         if ($line =~ s!^((copy|rename) from ).*$!$1! && $from->{'href'}) {
2283                 $line .= $cgi->a({-href=>$from->{'href'}, -class=>"path"},
2284                                        esc_path($from->{'file'}));
2285         }
2286         if ($line =~ s!^((copy|rename) to ).*$!$1! && $to->{'href'}) {
2287                 $line .= $cgi->a({-href=>$to->{'href'}, -class=>"path"},
2288                                  esc_path($to->{'file'}));
2289         }
2290         # match single <mode>
2291         if ($line =~ m/\s(\d{6})$/) {
2292                 $line .= '<span class="info"> (' .
2293                          file_type_long($1) .
2294                          ')</span>';
2295         }
2296         # match <hash>
2297         if ($line =~ m/^index [0-9a-fA-F]{40},[0-9a-fA-F]{40}/) {
2298                 # can match only for combined diff
2299                 $line = 'index ';
2300                 for (my $i = 0; $i < $diffinfo->{'nparents'}; $i++) {
2301                         if ($from->{'href'}[$i]) {
2302                                 $line .= $cgi->a({-href=>$from->{'href'}[$i],
2303                                                   -class=>"hash"},
2304                                                  substr($diffinfo->{'from_id'}[$i],0,7));
2305                         } else {
2306                                 $line .= '0' x 7;
2307                         }
2308                         # separator
2309                         $line .= ',' if ($i < $diffinfo->{'nparents'} - 1);
2310                 }
2311                 $line .= '..';
2312                 if ($to->{'href'}) {
2313                         $line .= $cgi->a({-href=>$to->{'href'}, -class=>"hash"},
2314                                          substr($diffinfo->{'to_id'},0,7));
2315                 } else {
2316                         $line .= '0' x 7;
2317                 }
2318
2319         } elsif ($line =~ m/^index [0-9a-fA-F]{40}..[0-9a-fA-F]{40}/) {
2320                 # can match only for ordinary diff
2321                 my ($from_link, $to_link);
2322                 if ($from->{'href'}) {
2323                         $from_link = $cgi->a({-href=>$from->{'href'}, -class=>"hash"},
2324                                              substr($diffinfo->{'from_id'},0,7));
2325                 } else {
2326                         $from_link = '0' x 7;
2327                 }
2328                 if ($to->{'href'}) {
2329                         $to_link = $cgi->a({-href=>$to->{'href'}, -class=>"hash"},
2330                                            substr($diffinfo->{'to_id'},0,7));
2331                 } else {
2332                         $to_link = '0' x 7;
2333                 }
2334                 my ($from_id, $to_id) = ($diffinfo->{'from_id'}, $diffinfo->{'to_id'});
2335                 $line =~ s!$from_id\.\.$to_id!$from_link..$to_link!;
2336         }
2337
2338         return $line . "<br/>\n";
2339 }
2340
2341 # format from-file/to-file diff header
2342 sub format_diff_from_to_header {
2343         my ($from_line, $to_line, $diffinfo, $from, $to, @parents) = @_;
2344         my $line;
2345         my $result = '';
2346
2347         $line = $from_line;
2348         #assert($line =~ m/^---/) if DEBUG;
2349         # no extra formatting for "^--- /dev/null"
2350         if (! $diffinfo->{'nparents'}) {
2351                 # ordinary (single parent) diff
2352                 if ($line =~ m!^--- "?a/!) {
2353                         if ($from->{'href'}) {
2354                                 $line = '--- a/' .
2355                                         $cgi->a({-href=>$from->{'href'}, -class=>"path"},
2356                                                 esc_path($from->{'file'}));
2357                         } else {
2358                                 $line = '--- a/' .
2359                                         esc_path($from->{'file'});
2360                         }
2361                 }
2362                 $result .= qq!<div class="diff from_file">$line</div>\n!;
2363
2364         } else {
2365                 # combined diff (merge commit)
2366                 for (my $i = 0; $i < $diffinfo->{'nparents'}; $i++) {
2367                         if ($from->{'href'}[$i]) {
2368                                 $line = '--- ' .
2369                                         $cgi->a({-href=>href(action=>"blobdiff",
2370                                                              hash_parent=>$diffinfo->{'from_id'}[$i],
2371                                                              hash_parent_base=>$parents[$i],
2372                                                              file_parent=>$from->{'file'}[$i],
2373                                                              hash=>$diffinfo->{'to_id'},
2374                                                              hash_base=>$hash,
2375                                                              file_name=>$to->{'file'}),
2376                                                  -class=>"path",
2377                                                  -title=>"diff" . ($i+1)},
2378                                                 $i+1) .
2379                                         '/' .
2380                                         $cgi->a({-href=>$from->{'href'}[$i], -class=>"path"},
2381                                                 esc_path($from->{'file'}[$i]));
2382                         } else {
2383                                 $line = '--- /dev/null';
2384                         }
2385                         $result .= qq!<div class="diff from_file">$line</div>\n!;
2386                 }
2387         }
2388
2389         $line = $to_line;
2390         #assert($line =~ m/^\+\+\+/) if DEBUG;
2391         # no extra formatting for "^+++ /dev/null"
2392         if ($line =~ m!^\+\+\+ "?b/!) {
2393                 if ($to->{'href'}) {
2394                         $line = '+++ b/' .
2395                                 $cgi->a({-href=>$to->{'href'}, -class=>"path"},
2396                                         esc_path($to->{'file'}));
2397                 } else {
2398                         $line = '+++ b/' .
2399                                 esc_path($to->{'file'});
2400                 }
2401         }
2402         $result .= qq!<div class="diff to_file">$line</div>\n!;
2403
2404         return $result;
2405 }
2406
2407 # create note for patch simplified by combined diff
2408 sub format_diff_cc_simplified {
2409         my ($diffinfo, @parents) = @_;
2410         my $result = '';
2411
2412         $result .= "<div class=\"diff header\">" .
2413                    "diff --cc ";
2414         if (!is_deleted($diffinfo)) {
2415                 $result .= $cgi->a({-href => href(action=>"blob",
2416                                                   hash_base=>$hash,
2417                                                   hash=>$diffinfo->{'to_id'},
2418                                                   file_name=>$diffinfo->{'to_file'}),
2419                                     -class => "path"},
2420                                    esc_path($diffinfo->{'to_file'}));
2421         } else {
2422                 $result .= esc_path($diffinfo->{'to_file'});
2423         }
2424         $result .= "</div>\n" . # class="diff header"
2425                    "<div class=\"diff nodifferences\">" .
2426                    "Simple merge" .
2427                    "</div>\n"; # class="diff nodifferences"
2428
2429         return $result;
2430 }
2431
2432 sub diff_line_class {
2433         my ($line, $from, $to) = @_;
2434
2435         # ordinary diff
2436         my $num_sign = 1;
2437         # combined diff
2438         if ($from && $to && ref($from->{'href'}) eq "ARRAY") {
2439                 $num_sign = scalar @{$from->{'href'}};
2440         }
2441
2442         my @diff_line_classifier = (
2443                 { regexp => qr/^\@\@{$num_sign} /, class => "chunk_header"},
2444                 { regexp => qr/^\\/,               class => "incomplete"  },
2445                 { regexp => qr/^ {$num_sign}/,     class => "ctx" },
2446                 # classifier for context must come before classifier add/rem,
2447                 # or we would have to use more complicated regexp, for example
2448                 # qr/(?= {0,$m}\+)[+ ]{$num_sign}/, where $m = $num_sign - 1;
2449                 { regexp => qr/^[+ ]{$num_sign}/,   class => "add" },
2450                 { regexp => qr/^[- ]{$num_sign}/,   class => "rem" },
2451         );
2452         for my $clsfy (@diff_line_classifier) {
2453                 return $clsfy->{'class'}
2454                         if ($line =~ $clsfy->{'regexp'});
2455         }
2456
2457         # fallback
2458         return "";
2459 }
2460
2461 # assumes that $from and $to are defined and correctly filled,
2462 # and that $line holds a line of chunk header for unified diff
2463 sub format_unidiff_chunk_header {
2464         my ($line, $from, $to) = @_;
2465
2466         my ($from_text, $from_start, $from_lines, $to_text, $to_start, $to_lines, $section) =
2467                 $line =~ m/^\@{2} (-(\d+)(?:,(\d+))?) (\+(\d+)(?:,(\d+))?) \@{2}(.*)$/;
2468
2469         $from_lines = 0 unless defined $from_lines;
2470         $to_lines   = 0 unless defined $to_lines;
2471
2472         if ($from->{'href'}) {
2473                 $from_text = $cgi->a({-href=>"$from->{'href'}#l$from_start",
2474                                      -class=>"list"}, $from_text);
2475         }
2476         if ($to->{'href'}) {
2477                 $to_text   = $cgi->a({-href=>"$to->{'href'}#l$to_start",
2478                                      -class=>"list"}, $to_text);
2479         }
2480         $line = "<span class=\"chunk_info\">@@ $from_text $to_text @@</span>" .
2481                 "<span class=\"section\">" . esc_html($section, -nbsp=>1) . "</span>";
2482         return $line;
2483 }
2484
2485 # assumes that $from and $to are defined and correctly filled,
2486 # and that $line holds a line of chunk header for combined diff
2487 sub format_cc_diff_chunk_header {
2488         my ($line, $from, $to) = @_;
2489
2490         my ($prefix, $ranges, $section) = $line =~ m/^(\@+) (.*?) \@+(.*)$/;
2491         my (@from_text, @from_start, @from_nlines, $to_text, $to_start, $to_nlines);
2492
2493         @from_text = split(' ', $ranges);
2494         for (my $i = 0; $i < @from_text; ++$i) {
2495                 ($from_start[$i], $from_nlines[$i]) =
2496                         (split(',', substr($from_text[$i], 1)), 0);
2497         }
2498
2499         $to_text   = pop @from_text;
2500         $to_start  = pop @from_start;
2501         $to_nlines = pop @from_nlines;
2502
2503         $line = "<span class=\"chunk_info\">$prefix ";
2504         for (my $i = 0; $i < @from_text; ++$i) {
2505                 if ($from->{'href'}[$i]) {
2506                         $line .= $cgi->a({-href=>"$from->{'href'}[$i]#l$from_start[$i]",
2507                                           -class=>"list"}, $from_text[$i]);
2508                 } else {
2509                         $line .= $from_text[$i];
2510                 }
2511                 $line .= " ";
2512         }
2513         if ($to->{'href'}) {
2514                 $line .= $cgi->a({-href=>"$to->{'href'}#l$to_start",
2515                                   -class=>"list"}, $to_text);
2516         } else {
2517                 $line .= $to_text;
2518         }
2519         $line .= " $prefix</span>" .
2520                  "<span class=\"section\">" . esc_html($section, -nbsp=>1) . "</span>";
2521         return $line;
2522 }
2523
2524 # process patch (diff) line (not to be used for diff headers),
2525 # returning HTML-formatted (but not wrapped) line.
2526 # If the line is passed as a reference, it is treated as HTML and not
2527 # esc_html()'ed.
2528 sub format_diff_line {
2529         my ($line, $diff_class, $from, $to) = @_;
2530
2531         if (ref($line)) {
2532                 $line = $$line;
2533         } else {
2534                 chomp $line;
2535                 $line = untabify($line);
2536
2537                 if ($from && $to && $line =~ m/^\@{2} /) {
2538                         $line = format_unidiff_chunk_header($line, $from, $to);
2539                 } elsif ($from && $to && $line =~ m/^\@{3}/) {
2540                         $line = format_cc_diff_chunk_header($line, $from, $to);
2541                 } else {
2542                         $line = esc_html($line, -nbsp=>1);
2543                 }
2544         }
2545
2546         my $diff_classes = "diff";
2547         $diff_classes .= " $diff_class" if ($diff_class);
2548         $line = "<div class=\"$diff_classes\">$line</div>\n";
2549
2550         return $line;
2551 }
2552
2553 # Generates undef or something like "_snapshot_" or "snapshot (_tbz2_ _zip_)",
2554 # linked.  Pass the hash of the tree/commit to snapshot.
2555 sub format_snapshot_links {
2556         my ($hash) = @_;
2557         my $num_fmts = @snapshot_fmts;
2558         if ($num_fmts > 1) {
2559                 # A parenthesized list of links bearing format names.
2560                 # e.g. "snapshot (_tar.gz_ _zip_)"
2561                 return "snapshot (" . join(' ', map
2562                         $cgi->a({
2563                                 -href => href(
2564                                         action=>"snapshot",
2565                                         hash=>$hash,
2566                                         snapshot_format=>$_
2567                                 )
2568                         }, $known_snapshot_formats{$_}{'display'})
2569                 , @snapshot_fmts) . ")";
2570         } elsif ($num_fmts == 1) {
2571                 # A single "snapshot" link whose tooltip bears the format name.
2572                 # i.e. "_snapshot_"
2573                 my ($fmt) = @snapshot_fmts;
2574                 return
2575                         $cgi->a({
2576                                 -href => href(
2577                                         action=>"snapshot",
2578                                         hash=>$hash,
2579                                         snapshot_format=>$fmt
2580                                 ),
2581                                 -title => "in format: $known_snapshot_formats{$fmt}{'display'}"
2582                         }, "snapshot");
2583         } else { # $num_fmts == 0
2584                 return undef;
2585         }
2586 }
2587
2588 ## ......................................................................
2589 ## functions returning values to be passed, perhaps after some
2590 ## transformation, to other functions; e.g. returning arguments to href()
2591
2592 # returns hash to be passed to href to generate gitweb URL
2593 # in -title key it returns description of link
2594 sub get_feed_info {
2595         my $format = shift || 'Atom';
2596         my %res = (action => lc($format));
2597         my $matched_ref = 0;
2598
2599         # feed links are possible only for project views
2600         return unless (defined $project);
2601         # some views should link to OPML, or to generic project feed,
2602         # or don't have specific feed yet (so they should use generic)
2603         return if (!$action || $action =~ /^(?:tags|heads|forks|tag|search)$/x);
2604
2605         my $branch = undef;
2606         # branches refs uses 'refs/' + $get_branch_refs()[x] + '/' prefix
2607         # (fullname) to differentiate from tag links; this also makes
2608         # possible to detect branch links
2609         for my $ref (get_branch_refs()) {
2610                 if ((defined $hash_base && $hash_base =~ m!^refs/\Q$ref\E/(.*)$!) ||
2611                     (defined $hash      && $hash      =~ m!^refs/\Q$ref\E/(.*)$!)) {
2612                         $branch = $1;
2613                         $matched_ref = $ref;
2614                         last;
2615                 }
2616         }
2617         # find log type for feed description (title)
2618         my $type = 'log';
2619         if (defined $file_name) {
2620                 $type  = "history of $file_name";
2621                 $type .= "/" if ($action eq 'tree');
2622                 $type .= " on '$branch'" if (defined $branch);
2623         } else {
2624                 $type = "log of $branch" if (defined $branch);
2625         }
2626
2627         $res{-title} = $type;
2628         $res{'hash'} = (defined $branch ? "refs/$matched_ref/$branch" : undef);
2629         $res{'file_name'} = $file_name;
2630
2631         return %res;
2632 }
2633
2634 ## ----------------------------------------------------------------------
2635 ## git utility subroutines, invoking git commands
2636
2637 # returns path to the core git executable and the --git-dir parameter as list
2638 sub git_cmd {
2639         $number_of_git_cmds++;
2640         return $GIT, '--git-dir='.$git_dir;
2641 }
2642
2643 # quote the given arguments for passing them to the shell
2644 # quote_command("command", "arg 1", "arg with ' and ! characters")
2645 # => "'command' 'arg 1' 'arg with '\'' and '\!' characters'"
2646 # Try to avoid using this function wherever possible.
2647 sub quote_command {
2648         return join(' ',
2649                 map { my $a = $_; $a =~ s/(['!])/'\\$1'/g; "'$a'" } @_ );
2650 }
2651
2652 # get HEAD ref of given project as hash
2653 sub git_get_head_hash {
2654         return git_get_full_hash(shift, 'HEAD');
2655 }
2656
2657 sub git_get_full_hash {
2658         return git_get_hash(@_);
2659 }
2660
2661 sub git_get_short_hash {
2662         return git_get_hash(@_, '--short=7');
2663 }
2664
2665 sub git_get_hash {
2666         my ($project, $hash, @options) = @_;
2667         my $o_git_dir = $git_dir;
2668         my $retval = undef;
2669         $git_dir = "$projectroot/$project";
2670         if (open my $fd, '-|', git_cmd(), 'rev-parse',
2671             '--verify', '-q', @options, $hash) {
2672                 $retval = <$fd>;
2673                 chomp $retval if defined $retval;
2674                 close $fd;
2675         }
2676         if (defined $o_git_dir) {
2677                 $git_dir = $o_git_dir;
2678         }
2679         return $retval;
2680 }
2681
2682 # get type of given object
2683 sub git_get_type {
2684         my $hash = shift;
2685
2686         open my $fd, "-|", git_cmd(), "cat-file", '-t', $hash or return;
2687         my $type = <$fd>;
2688         close $fd or return;
2689         chomp $type;
2690         return $type;
2691 }
2692
2693 # repository configuration
2694 our $config_file = '';
2695 our %config;
2696
2697 # store multiple values for single key as anonymous array reference
2698 # single values stored directly in the hash, not as [ <value> ]
2699 sub hash_set_multi {
2700         my ($hash, $key, $value) = @_;
2701
2702         if (!exists $hash->{$key}) {
2703                 $hash->{$key} = $value;
2704         } elsif (!ref $hash->{$key}) {
2705                 $hash->{$key} = [ $hash->{$key}, $value ];
2706         } else {
2707                 push @{$hash->{$key}}, $value;
2708         }
2709 }
2710
2711 # return hash of git project configuration
2712 # optionally limited to some section, e.g. 'gitweb'
2713 sub git_parse_project_config {
2714         my $section_regexp = shift;
2715         my %config;
2716
2717         local $/ = "\0";
2718
2719         open my $fh, "-|", git_cmd(), "config", '-z', '-l',
2720                 or return;
2721
2722         while (my $keyval = <$fh>) {
2723                 chomp $keyval;
2724                 my ($key, $value) = split(/\n/, $keyval, 2);
2725
2726                 hash_set_multi(\%config, $key, $value)
2727                         if (!defined $section_regexp || $key =~ /^(?:$section_regexp)\./o);
2728         }
2729         close $fh;
2730
2731         return %config;
2732 }
2733
2734 # convert config value to boolean: 'true' or 'false'
2735 # no value, number > 0, 'true' and 'yes' values are true
2736 # rest of values are treated as false (never as error)
2737 sub config_to_bool {
2738         my $val = shift;
2739
2740         return 1 if !defined $val;             # section.key
2741
2742         # strip leading and trailing whitespace
2743         $val =~ s/^\s+//;
2744         $val =~ s/\s+$//;
2745
2746         return (($val =~ /^\d+$/ && $val) ||   # section.key = 1
2747                 ($val =~ /^(?:true|yes)$/i));  # section.key = true
2748 }
2749
2750 # convert config value to simple decimal number
2751 # an optional value suffix of 'k', 'm', or 'g' will cause the value
2752 # to be multiplied by 1024, 1048576, or 1073741824
2753 sub config_to_int {
2754         my $val = shift;
2755
2756         # strip leading and trailing whitespace
2757         $val =~ s/^\s+//;
2758         $val =~ s/\s+$//;
2759
2760         if (my ($num, $unit) = ($val =~ /^([0-9]*)([kmg])$/i)) {
2761                 $unit = lc($unit);
2762                 # unknown unit is treated as 1
2763                 return $num * ($unit eq 'g' ? 1073741824 :
2764                                $unit eq 'm' ?    1048576 :
2765                                $unit eq 'k' ?       1024 : 1);
2766         }
2767         return $val;
2768 }
2769
2770 # convert config value to array reference, if needed
2771 sub config_to_multi {
2772         my $val = shift;
2773
2774         return ref($val) ? $val : (defined($val) ? [ $val ] : []);
2775 }
2776
2777 sub git_get_project_config {
2778         my ($key, $type) = @_;
2779
2780         return unless defined $git_dir;
2781
2782         # key sanity check
2783         return unless ($key);
2784         # only subsection, if exists, is case sensitive,
2785         # and not lowercased by 'git config -z -l'
2786         if (my ($hi, $mi, $lo) = ($key =~ /^([^.]*)\.(.*)\.([^.]*)$/)) {
2787                 $lo =~ s/_//g;
2788                 $key = join(".", lc($hi), $mi, lc($lo));
2789                 return if ($lo =~ /\W/ || $hi =~ /\W/);
2790         } else {
2791                 $key = lc($key);
2792                 $key =~ s/_//g;
2793                 return if ($key =~ /\W/);
2794         }
2795         $key =~ s/^gitweb\.//;
2796
2797         # type sanity check
2798         if (defined $type) {
2799                 $type =~ s/^--//;
2800                 $type = undef
2801                         unless ($type eq 'bool' || $type eq 'int');
2802         }
2803
2804         # get config
2805         if (!defined $config_file ||
2806             $config_file ne "$git_dir/config") {
2807                 %config = git_parse_project_config('gitweb');
2808                 $config_file = "$git_dir/config";
2809         }
2810
2811         # check if config variable (key) exists
2812         return unless exists $config{"gitweb.$key"};
2813
2814         # ensure given type
2815         if (!defined $type) {
2816                 return $config{"gitweb.$key"};
2817         } elsif ($type eq 'bool') {
2818                 # backward compatibility: 'git config --bool' returns true/false
2819                 return config_to_bool($config{"gitweb.$key"}) ? 'true' : 'false';
2820         } elsif ($type eq 'int') {
2821                 return config_to_int($config{"gitweb.$key"});
2822         }
2823         return $config{"gitweb.$key"};
2824 }
2825
2826 # get hash of given path at given ref
2827 sub git_get_hash_by_path {
2828         my $base = shift;
2829         my $path = shift || return undef;
2830         my $type = shift;
2831
2832         $path =~ s,/+$,,;
2833
2834         open my $fd, "-|", git_cmd(), "ls-tree", $base, "--", $path
2835                 or die_error(500, "Open git-ls-tree failed");
2836         my $line = <$fd>;
2837         close $fd or return undef;
2838
2839         if (!defined $line) {
2840                 # there is no tree or hash given by $path at $base
2841                 return undef;
2842         }
2843
2844         #'100644 blob 0fa3f3a66fb6a137f6ec2c19351ed4d807070ffa  panic.c'
2845         $line =~ m/^([0-9]+) (.+) ([0-9a-fA-F]{40})\t/;
2846         if (defined $type && $type ne $2) {
2847                 # type doesn't match
2848                 return undef;
2849         }
2850         return $3;
2851 }
2852
2853 # get path of entry with given hash at given tree-ish (ref)
2854 # used to get 'from' filename for combined diff (merge commit) for renames
2855 sub git_get_path_by_hash {
2856         my $base = shift || return;
2857         my $hash = shift || return;
2858
2859         local $/ = "\0";
2860
2861         open my $fd, "-|", git_cmd(), "ls-tree", '-r', '-t', '-z', $base
2862                 or return undef;
2863         while (my $line = <$fd>) {
2864                 chomp $line;
2865
2866                 #'040000 tree 595596a6a9117ddba9fe379b6b012b558bac8423  gitweb'
2867                 #'100644 blob e02e90f0429be0d2a69b76571101f20b8f75530f  gitweb/README'
2868                 if ($line =~ m/(?:[0-9]+) (?:.+) $hash\t(.+)$/) {
2869                         close $fd;
2870                         return $1;
2871                 }
2872         }
2873         close $fd;
2874         return undef;
2875 }
2876
2877 ## ......................................................................
2878 ## git utility functions, directly accessing git repository
2879
2880 # get the value of config variable either from file named as the variable
2881 # itself in the repository ($GIT_DIR/$name file), or from gitweb.$name
2882 # configuration variable in the repository config file.
2883 sub git_get_file_or_project_config {
2884         my ($path, $name) = @_;
2885
2886         $git_dir = "$projectroot/$path";
2887         open my $fd, '<', "$git_dir/$name"
2888                 or return git_get_project_config($name);
2889         my $conf = <$fd>;
2890         close $fd;
2891         if (defined $conf) {
2892                 chomp $conf;
2893         }
2894         return $conf;
2895 }
2896
2897 sub git_get_project_description {
2898         my $path = shift;
2899         return git_get_file_or_project_config($path, 'description');
2900 }
2901
2902 sub git_get_project_category {
2903         my $path = shift;
2904         return git_get_file_or_project_config($path, 'category');
2905 }
2906
2907
2908 # supported formats:
2909 # * $GIT_DIR/ctags/<tagname> file (in 'ctags' subdirectory)
2910 #   - if its contents is a number, use it as tag weight,
2911 #   - otherwise add a tag with weight 1
2912 # * $GIT_DIR/ctags file, each line is a tag (with weight 1)
2913 #   the same value multiple times increases tag weight
2914 # * `gitweb.ctag' multi-valued repo config variable
2915 sub git_get_project_ctags {
2916         my $project = shift;
2917         my $ctags = {};
2918
2919         $git_dir = "$projectroot/$project";
2920         if (opendir my $dh, "$git_dir/ctags") {
2921                 my @files = grep { -f $_ } map { "$git_dir/ctags/$_" } readdir($dh);
2922                 foreach my $tagfile (@files) {
2923                         open my $ct, '<', $tagfile
2924                                 or next;
2925                         my $val = <$ct>;
2926                         chomp $val if $val;
2927                         close $ct;
2928
2929                         (my $ctag = $tagfile) =~ s#.*/##;
2930                         if ($val =~ /^\d+$/) {
2931                                 $ctags->{$ctag} = $val;
2932                         } else {
2933                                 $ctags->{$ctag} = 1;
2934                         }
2935                 }
2936                 closedir $dh;
2937
2938         } elsif (open my $fh, '<', "$git_dir/ctags") {
2939                 while (my $line = <$fh>) {
2940                         chomp $line;
2941                         $ctags->{$line}++ if $line;
2942                 }
2943                 close $fh;
2944
2945         } else {
2946                 my $taglist = config_to_multi(git_get_project_config('ctag'));
2947                 foreach my $tag (@$taglist) {
2948                         $ctags->{$tag}++;
2949                 }
2950         }
2951
2952         return $ctags;
2953 }
2954
2955 # return hash, where keys are content tags ('ctags'),
2956 # and values are sum of weights of given tag in every project
2957 sub git_gather_all_ctags {
2958         my $projects = shift;
2959         my $ctags = {};
2960
2961         foreach my $p (@$projects) {
2962                 foreach my $ct (keys %{$p->{'ctags'}}) {
2963                         $ctags->{$ct} += $p->{'ctags'}->{$ct};
2964                 }
2965         }
2966
2967         return $ctags;
2968 }
2969
2970 sub git_populate_project_tagcloud {
2971         my $ctags = shift;
2972
2973         # First, merge different-cased tags; tags vote on casing
2974         my %ctags_lc;
2975         foreach (keys %$ctags) {
2976                 $ctags_lc{lc $_}->{count} += $ctags->{$_};
2977                 if (not $ctags_lc{lc $_}->{topcount}
2978                     or $ctags_lc{lc $_}->{topcount} < $ctags->{$_}) {
2979                         $ctags_lc{lc $_}->{topcount} = $ctags->{$_};
2980                         $ctags_lc{lc $_}->{topname} = $_;
2981                 }
2982         }
2983
2984         my $cloud;
2985         my $matched = $input_params{'ctag'};
2986         if (eval { require HTML::TagCloud; 1; }) {
2987                 $cloud = HTML::TagCloud->new;
2988                 foreach my $ctag (sort keys %ctags_lc) {
2989                         # Pad the title with spaces so that the cloud looks
2990                         # less crammed.
2991                         my $title = esc_html($ctags_lc{$ctag}->{topname});
2992                         $title =~ s/ /&nbsp;/g;
2993                         $title =~ s/^/&nbsp;/g;
2994                         $title =~ s/$/&nbsp;/g;
2995                         if (defined $matched && $matched eq $ctag) {
2996                                 $title = qq(<span class="match">$title</span>);
2997                         }
2998                         $cloud->add($title, href(project=>undef, ctag=>$ctag),
2999                                     $ctags_lc{$ctag}->{count});
3000                 }
3001         } else {
3002                 $cloud = {};
3003                 foreach my $ctag (keys %ctags_lc) {
3004                         my $title = esc_html($ctags_lc{$ctag}->{topname}, -nbsp=>1);
3005                         if (defined $matched && $matched eq $ctag) {
3006                                 $title = qq(<span class="match">$title</span>);
3007                         }
3008                         $cloud->{$ctag}{count} = $ctags_lc{$ctag}->{count};
3009                         $cloud->{$ctag}{ctag} =
3010                                 $cgi->a({-href=>href(project=>undef, ctag=>$ctag)}, $title);
3011                 }
3012         }
3013         return $cloud;
3014 }
3015
3016 sub git_show_project_tagcloud {
3017         my ($cloud, $count) = @_;
3018         if (ref $cloud eq 'HTML::TagCloud') {
3019                 return $cloud->html_and_css($count);
3020         } else {
3021                 my @tags = sort { $cloud->{$a}->{'count'} <=> $cloud->{$b}->{'count'} } keys %$cloud;
3022                 return
3023                         '<div id="htmltagcloud"'.($project ? '' : ' align="center"').'>' .
3024                         join (', ', map {
3025                                 $cloud->{$_}->{'ctag'}
3026                         } splice(@tags, 0, $count)) .
3027                         '</div>';
3028         }
3029 }
3030
3031 sub git_get_project_url_list {
3032         my $path = shift;
3033
3034         $git_dir = "$projectroot/$path";
3035         open my $fd, '<', "$git_dir/cloneurl"
3036                 or return wantarray ?
3037                 @{ config_to_multi(git_get_project_config('url')) } :
3038                    config_to_multi(git_get_project_config('url'));
3039         my @git_project_url_list = map { chomp; $_ } <$fd>;
3040         close $fd;
3041
3042         return wantarray ? @git_project_url_list : \@git_project_url_list;
3043 }
3044
3045 sub git_get_projects_list {
3046         my $filter = shift || '';
3047         my $paranoid = shift;
3048         my @list;
3049
3050         if (-d $projects_list) {
3051                 # search in directory
3052                 my $dir = $projects_list;
3053                 # remove the trailing "/"
3054                 $dir =~ s!/+$!!;
3055                 my $pfxlen = length("$dir");
3056                 my $pfxdepth = ($dir =~ tr!/!!);
3057                 # when filtering, search only given subdirectory
3058                 if ($filter && !$paranoid) {
3059                         $dir .= "/$filter";
3060                         $dir =~ s!/+$!!;
3061                 }
3062
3063                 File::Find::find({
3064                         follow_fast => 1, # follow symbolic links
3065                         follow_skip => 2, # ignore duplicates
3066                         dangling_symlinks => 0, # ignore dangling symlinks, silently
3067                         wanted => sub {
3068                                 # global variables
3069                                 our $project_maxdepth;
3070                                 our $projectroot;
3071                                 # skip project-list toplevel, if we get it.
3072                                 return if (m!^[/.]$!);
3073                                 # only directories can be git repositories
3074                                 return unless (-d $_);
3075                                 # need search permission
3076                                 return unless (-x $_);
3077                                 # don't traverse too deep (Find is super slow on os x)
3078                                 # $project_maxdepth excludes depth of $projectroot
3079                                 if (($File::Find::name =~ tr!/!!) - $pfxdepth > $project_maxdepth) {
3080                                         $File::Find::prune = 1;
3081                                         return;
3082                                 }
3083
3084                                 my $path = substr($File::Find::name, $pfxlen + 1);
3085                                 # paranoidly only filter here
3086                                 if ($paranoid && $filter && $path !~ m!^\Q$filter\E/!) {
3087                                         next;
3088                                 }
3089                                 # we check related file in $projectroot
3090                                 if (check_export_ok("$projectroot/$path")) {
3091                                         push @list, { path => $path };
3092                                         $File::Find::prune = 1;
3093                                 }
3094                         },
3095                 }, "$dir");
3096
3097         } elsif (-f $projects_list) {
3098                 # read from file(url-encoded):
3099                 # 'git%2Fgit.git Linus+Torvalds'
3100                 # 'libs%2Fklibc%2Fklibc.git H.+Peter+Anvin'
3101                 # 'linux%2Fhotplug%2Fudev.git Greg+Kroah-Hartman'
3102                 open my $fd, '<', $projects_list or return;
3103         PROJECT:
3104                 while (my $line = <$fd>) {
3105                         chomp $line;
3106                         my ($path, $owner) = split ' ', $line;
3107                         $path = unescape($path);
3108                         $owner = unescape($owner);
3109                         if (!defined $path) {
3110                                 next;
3111                         }
3112                         # if $filter is rpovided, check if $path begins with $filter
3113                         if ($filter && $path !~ m!^\Q$filter\E/!) {
3114                                 next;
3115                         }
3116                         if (check_export_ok("$projectroot/$path")) {
3117                                 my $pr = {
3118                                         path => $path
3119                                 };
3120                                 if ($owner) {
3121                                         $pr->{'owner'} = to_utf8($owner);
3122                                 }
3123                                 push @list, $pr;
3124                         }
3125                 }
3126                 close $fd;
3127         }
3128         return @list;
3129 }
3130
3131 # written with help of Tree::Trie module (Perl Artistic License, GPL compatible)
3132 # as side effects it sets 'forks' field to list of forks for forked projects
3133 sub filter_forks_from_projects_list {
3134         my $projects = shift;
3135
3136         my %trie; # prefix tree of directories (path components)
3137         # generate trie out of those directories that might contain forks
3138         foreach my $pr (@$projects) {
3139                 my $path = $pr->{'path'};
3140                 $path =~ s/\.git$//;      # forks of 'repo.git' are in 'repo/' directory
3141                 next if ($path =~ m!/$!); # skip non-bare repositories, e.g. 'repo/.git'
3142                 next unless ($path);      # skip '.git' repository: tests, git-instaweb
3143                 next unless (-d "$projectroot/$path"); # containing directory exists
3144                 $pr->{'forks'} = [];      # there can be 0 or more forks of project
3145
3146                 # add to trie
3147                 my @dirs = split('/', $path);
3148                 # walk the trie, until either runs out of components or out of trie
3149                 my $ref = \%trie;
3150                 while (scalar @dirs &&
3151                        exists($ref->{$dirs[0]})) {
3152                         $ref = $ref->{shift @dirs};
3153                 }
3154                 # create rest of trie structure from rest of components
3155                 foreach my $dir (@dirs) {
3156                         $ref = $ref->{$dir} = {};
3157                 }
3158                 # create end marker, store $pr as a data
3159                 $ref->{''} = $pr if (!exists $ref->{''});
3160         }
3161
3162         # filter out forks, by finding shortest prefix match for paths
3163         my @filtered;
3164  PROJECT:
3165         foreach my $pr (@$projects) {
3166                 # trie lookup
3167                 my $ref = \%trie;
3168         DIR:
3169                 foreach my $dir (split('/', $pr->{'path'})) {
3170                         if (exists $ref->{''}) {
3171                                 # found [shortest] prefix, is a fork - skip it
3172                                 push @{$ref->{''}{'forks'}}, $pr;
3173                                 next PROJECT;
3174                         }
3175                         if (!exists $ref->{$dir}) {
3176                                 # not in trie, cannot have prefix, not a fork
3177                                 push @filtered, $pr;
3178                                 next PROJECT;
3179                         }
3180                         # If the dir is there, we just walk one step down the trie.
3181                         $ref = $ref->{$dir};
3182                 }
3183                 # we ran out of trie
3184                 # (shouldn't happen: it's either no match, or end marker)
3185                 push @filtered, $pr;
3186         }
3187
3188         return @filtered;
3189 }
3190
3191 # note: fill_project_list_info must be run first,
3192 # for 'descr_long' and 'ctags' to be filled
3193 sub search_projects_list {
3194         my ($projlist, %opts) = @_;
3195         my $tagfilter  = $opts{'tagfilter'};
3196         my $search_re = $opts{'search_regexp'};
3197
3198         return @$projlist
3199                 unless ($tagfilter || $search_re);
3200
3201         # searching projects require filling to be run before it;
3202         fill_project_list_info($projlist,
3203                                $tagfilter  ? 'ctags' : (),
3204                                $search_re ? ('path', 'descr') : ());
3205         my @projects;
3206  PROJECT:
3207         foreach my $pr (@$projlist) {
3208
3209                 if ($tagfilter) {
3210                         next unless ref($pr->{'ctags'}) eq 'HASH';
3211                         next unless
3212                                 grep { lc($_) eq lc($tagfilter) } keys %{$pr->{'ctags'}};
3213                 }
3214
3215                 if ($search_re) {
3216                         next unless
3217                                 $pr->{'path'} =~ /$search_re/ ||
3218                                 $pr->{'descr_long'} =~ /$search_re/;
3219                 }
3220
3221                 push @projects, $pr;
3222         }
3223
3224         return @projects;
3225 }
3226
3227 our $gitweb_project_owner = undef;
3228 sub git_get_project_list_from_file {
3229
3230         return if (defined $gitweb_project_owner);
3231
3232         $gitweb_project_owner = {};
3233         # read from file (url-encoded):
3234         # 'git%2Fgit.git Linus+Torvalds'
3235         # 'libs%2Fklibc%2Fklibc.git H.+Peter+Anvin'
3236         # 'linux%2Fhotplug%2Fudev.git Greg+Kroah-Hartman'
3237         if (-f $projects_list) {
3238                 open(my $fd, '<', $projects_list);
3239                 while (my $line = <$fd>) {
3240                         chomp $line;
3241                         my ($pr, $ow) = split ' ', $line;
3242                         $pr = unescape($pr);
3243                         $ow = unescape($ow);
3244                         $gitweb_project_owner->{$pr} = to_utf8($ow);
3245                 }
3246                 close $fd;
3247         }
3248 }
3249
3250 sub git_get_project_owner {
3251         my $project = shift;
3252         my $owner;
3253
3254         return undef unless $project;
3255         $git_dir = "$projectroot/$project";
3256
3257         if (!defined $gitweb_project_owner) {
3258                 git_get_project_list_from_file();
3259         }
3260
3261         if (exists $gitweb_project_owner->{$project}) {
3262                 $owner = $gitweb_project_owner->{$project};
3263         }
3264         if (!defined $owner){
3265                 $owner = git_get_project_config('owner');
3266         }
3267         if (!defined $owner) {
3268                 $owner = get_file_owner("$git_dir");
3269         }
3270
3271         return $owner;
3272 }
3273
3274 sub git_get_last_activity {
3275         my ($path) = @_;
3276         my $fd;
3277
3278         $git_dir = "$projectroot/$path";
3279         open($fd, "-|", git_cmd(), 'for-each-ref',
3280              '--format=%(committer)',
3281              '--sort=-committerdate',
3282              '--count=1',
3283              map { "refs/$_" } get_branch_refs ()) or return;
3284         my $most_recent = <$fd>;
3285         close $fd or return;
3286         if (defined $most_recent &&
3287             $most_recent =~ / (\d+) [-+][01]\d\d\d$/) {
3288                 my $timestamp = $1;
3289                 my $age = time - $timestamp;
3290                 return ($age, age_string($age));
3291         }
3292         return (undef, undef);
3293 }
3294
3295 # Implementation note: when a single remote is wanted, we cannot use 'git
3296 # remote show -n' because that command always work (assuming it's a remote URL
3297 # if it's not defined), and we cannot use 'git remote show' because that would
3298 # try to make a network roundtrip. So the only way to find if that particular
3299 # remote is defined is to walk the list provided by 'git remote -v' and stop if
3300 # and when we find what we want.
3301 sub git_get_remotes_list {
3302         my $wanted = shift;
3303         my %remotes = ();
3304
3305         open my $fd, '-|' , git_cmd(), 'remote', '-v';
3306         return unless $fd;
3307         while (my $remote = <$fd>) {
3308                 chomp $remote;
3309                 $remote =~ s!\t(.*?)\s+\((\w+)\)$!!;
3310                 next if $wanted and not $remote eq $wanted;
3311                 my ($url, $key) = ($1, $2);
3312
3313                 $remotes{$remote} ||= { 'heads' => () };
3314                 $remotes{$remote}{$key} = $url;
3315         }
3316         close $fd or return;
3317         return wantarray ? %remotes : \%remotes;
3318 }
3319
3320 # Takes a hash of remotes as first parameter and fills it by adding the
3321 # available remote heads for each of the indicated remotes.
3322 sub fill_remote_heads {
3323         my $remotes = shift;
3324         my @heads = map { "remotes/$_" } keys %$remotes;
3325         my @remoteheads = git_get_heads_list(undef, @heads);
3326         foreach my $remote (keys %$remotes) {
3327                 $remotes->{$remote}{'heads'} = [ grep {
3328                         $_->{'name'} =~ s!^$remote/!!
3329                         } @remoteheads ];
3330         }
3331 }
3332
3333 sub git_get_references {
3334         my $type = shift || "";
3335         my %refs;
3336         # 5dc01c595e6c6ec9ccda4f6f69c131c0dd945f8c refs/tags/v2.6.11
3337         # c39ae07f393806ccf406ef966e9a15afc43cc36a refs/tags/v2.6.11^{}
3338         open my $fd, "-|", git_cmd(), "show-ref", "--dereference",
3339                 ($type ? ("--", "refs/$type") : ()) # use -- <pattern> if $type
3340                 or return;
3341
3342         while (my $line = <$fd>) {
3343                 chomp $line;
3344                 if ($line =~ m!^([0-9a-fA-F]{40})\srefs/($type.*)$!) {
3345                         if (defined $refs{$1}) {
3346                                 push @{$refs{$1}}, $2;
3347                         } else {
3348                                 $refs{$1} = [ $2 ];
3349                         }
3350                 }
3351         }
3352         close $fd or return;
3353         return \%refs;
3354 }
3355
3356 sub git_get_rev_name_tags {
3357         my $hash = shift || return undef;
3358
3359         open my $fd, "-|", git_cmd(), "name-rev", "--tags", $hash
3360                 or return;
3361         my $name_rev = <$fd>;
3362         close $fd;
3363
3364         if ($name_rev =~ m|^$hash tags/(.*)$|) {
3365                 return $1;
3366         } else {
3367                 # catches also '$hash undefined' output
3368                 return undef;
3369         }
3370 }
3371
3372 ## ----------------------------------------------------------------------
3373 ## parse to hash functions
3374
3375 sub parse_date {
3376         my $epoch = shift;
3377         my $tz = shift || "-0000";
3378
3379         my %date;
3380         my @months = ("Jan", "Feb", "Mar", "Apr", "May", "Jun", "Jul", "Aug", "Sep", "Oct", "Nov", "Dec");
3381         my @days = ("Sun", "Mon", "Tue", "Wed", "Thu", "Fri", "Sat");
3382         my ($sec, $min, $hour, $mday, $mon, $year, $wday, $yday) = gmtime($epoch);
3383         $date{'hour'} = $hour;
3384         $date{'minute'} = $min;
3385         $date{'mday'} = $mday;
3386         $date{'day'} = $days[$wday];
3387         $date{'month'} = $months[$mon];
3388         $date{'rfc2822'}   = sprintf "%s, %d %s %4d %02d:%02d:%02d +0000",
3389                              $days[$wday], $mday, $months[$mon], 1900+$year, $hour ,$min, $sec;
3390         $date{'mday-time'} = sprintf "%d %s %02d:%02d",
3391                              $mday, $months[$mon], $hour ,$min;
3392         $date{'iso-8601'}  = sprintf "%04d-%02d-%02dT%02d:%02d:%02dZ",
3393                              1900+$year, 1+$mon, $mday, $hour ,$min, $sec;
3394
3395         my ($tz_sign, $tz_hour, $tz_min) =
3396                 ($tz =~ m/^([-+])(\d\d)(\d\d)$/);
3397         $tz_sign = ($tz_sign eq '-' ? -1 : +1);
3398         my $local = $epoch + $tz_sign*((($tz_hour*60) + $tz_min)*60);
3399         ($sec, $min, $hour, $mday, $mon, $year, $wday, $yday) = gmtime($local);
3400         $date{'hour_local'} = $hour;
3401         $date{'minute_local'} = $min;
3402         $date{'tz_local'} = $tz;
3403         $date{'iso-tz'} = sprintf("%04d-%02d-%02d %02d:%02d:%02d %s",
3404                                   1900+$year, $mon+1, $mday,
3405                                   $hour, $min, $sec, $tz);
3406         return %date;
3407 }
3408
3409 sub parse_tag {
3410         my $tag_id = shift;
3411         my %tag;
3412         my @comment;
3413
3414         open my $fd, "-|", git_cmd(), "cat-file", "tag", $tag_id or return;
3415         $tag{'id'} = $tag_id;
3416         while (my $line = <$fd>) {
3417                 chomp $line;
3418                 if ($line =~ m/^object ([0-9a-fA-F]{40})$/) {
3419                         $tag{'object'} = $1;
3420                 } elsif ($line =~ m/^type (.+)$/) {
3421                         $tag{'type'} = $1;
3422                 } elsif ($line =~ m/^tag (.+)$/) {
3423                         $tag{'name'} = $1;
3424                 } elsif ($line =~ m/^tagger (.*) ([0-9]+) (.*)$/) {
3425                         $tag{'author'} = $1;
3426                         $tag{'author_epoch'} = $2;
3427                         $tag{'author_tz'} = $3;
3428                         if ($tag{'author'} =~ m/^([^<]+) <([^>]*)>/) {
3429                                 $tag{'author_name'}  = $1;
3430                                 $tag{'author_email'} = $2;
3431                         } else {
3432                                 $tag{'author_name'} = $tag{'author'};
3433                         }
3434                 } elsif ($line =~ m/--BEGIN/) {
3435                         push @comment, $line;
3436                         last;
3437                 } elsif ($line eq "") {
3438                         last;
3439                 }
3440         }
3441         push @comment, <$fd>;
3442         $tag{'comment'} = \@comment;
3443         close $fd or return;
3444         if (!defined $tag{'name'}) {
3445                 return
3446         };
3447         return %tag
3448 }
3449
3450 sub parse_commit_text {
3451         my ($commit_text, $withparents) = @_;
3452         my @commit_lines = split '\n', $commit_text;
3453         my %co;
3454
3455         pop @commit_lines; # Remove '\0'
3456
3457         if (! @commit_lines) {
3458                 return;
3459         }
3460
3461         my $header = shift @commit_lines;
3462         if ($header !~ m/^[0-9a-fA-F]{40}/) {
3463                 return;
3464         }
3465         ($co{'id'}, my @parents) = split ' ', $header;
3466         while (my $line = shift @commit_lines) {
3467                 last if $line eq "\n";
3468                 if ($line =~ m/^tree ([0-9a-fA-F]{40})$/) {
3469                         $co{'tree'} = $1;
3470                 } elsif ((!defined $withparents) && ($line =~ m/^parent ([0-9a-fA-F]{40})$/)) {
3471                         push @parents, $1;
3472                 } elsif ($line =~ m/^author (.*) ([0-9]+) (.*)$/) {
3473                         $co{'author'} = to_utf8($1);
3474                         $co{'author_epoch'} = $2;
3475                         $co{'author_tz'} = $3;
3476                         if ($co{'author'} =~ m/^([^<]+) <([^>]*)>/) {
3477                                 $co{'author_name'}  = $1;
3478                                 $co{'author_email'} = $2;
3479                         } else {
3480                                 $co{'author_name'} = $co{'author'};
3481                         }
3482                 } elsif ($line =~ m/^committer (.*) ([0-9]+) (.*)$/) {
3483                         $co{'committer'} = to_utf8($1);
3484                         $co{'committer_epoch'} = $2;
3485                         $co{'committer_tz'} = $3;
3486                         if ($co{'committer'} =~ m/^([^<]+) <([^>]*)>/) {
3487                                 $co{'committer_name'}  = $1;
3488                                 $co{'committer_email'} = $2;
3489                         } else {
3490                                 $co{'committer_name'} = $co{'committer'};
3491                         }
3492                 }
3493         }
3494         if (!defined $co{'tree'}) {
3495                 return;
3496         };
3497         $co{'parents'} = \@parents;
3498         $co{'parent'} = $parents[0];
3499
3500         foreach my $title (@commit_lines) {
3501                 $title =~ s/^    //;
3502                 if ($title ne "") {
3503                         $co{'title'} = chop_str($title, 80, 5);
3504                         # remove leading stuff of merges to make the interesting part visible
3505                         if (length($title) > 50) {
3506                                 $title =~ s/^Automatic //;
3507                                 $title =~ s/^merge (of|with) /Merge ... /i;
3508                                 if (length($title) > 50) {
3509                                         $title =~ s/(http|rsync):\/\///;
3510                                 }
3511                                 if (length($title) > 50) {
3512                                         $title =~ s/(master|www|rsync)\.//;
3513                                 }
3514                                 if (length($title) > 50) {
3515                                         $title =~ s/kernel.org:?//;
3516                                 }
3517                                 if (length($title) > 50) {
3518                                         $title =~ s/\/pub\/scm//;
3519                                 }
3520                         }
3521                         $co{'title_short'} = chop_str($title, 50, 5);
3522                         last;
3523                 }
3524         }
3525         if (! defined $co{'title'} || $co{'title'} eq "") {
3526                 $co{'title'} = $co{'title_short'} = '(no commit message)';
3527         }
3528         # remove added spaces
3529         foreach my $line (@commit_lines) {
3530                 $line =~ s/^    //;
3531         }
3532         $co{'comment'} = \@commit_lines;
3533
3534         my $age = time - $co{'committer_epoch'};
3535         $co{'age'} = $age;
3536         $co{'age_string'} = age_string($age);
3537         my ($sec, $min, $hour, $mday, $mon, $year, $wday, $yday) = gmtime($co{'committer_epoch'});
3538         if ($age > 60*60*24*7*2) {
3539                 $co{'age_string_date'} = sprintf "%4i-%02u-%02i", 1900 + $year, $mon+1, $mday;
3540                 $co{'age_string_age'} = $co{'age_string'};
3541         } else {
3542                 $co{'age_string_date'} = $co{'age_string'};
3543                 $co{'age_string_age'} = sprintf "%4i-%02u-%02i", 1900 + $year, $mon+1, $mday;
3544         }
3545         return %co;
3546 }
3547
3548 sub parse_commit {
3549         my ($commit_id) = @_;
3550         my %co;
3551
3552         local $/ = "\0";
3553
3554         open my $fd, "-|", git_cmd(), "rev-list",
3555                 "--parents",
3556                 "--header",
3557                 "--max-count=1",
3558                 $commit_id,
3559                 "--",
3560                 or die_error(500, "Open git-rev-list failed");
3561         %co = parse_commit_text(<$fd>, 1);
3562         close $fd;
3563
3564         return %co;
3565 }
3566
3567 sub parse_commits {
3568         my ($commit_id, $maxcount, $skip, $filename, @args) = @_;
3569         my @cos;
3570
3571         $maxcount ||= 1;
3572         $skip ||= 0;
3573
3574         local $/ = "\0";
3575
3576         open my $fd, "-|", git_cmd(), "rev-list",
3577                 "--header",
3578                 @args,
3579                 ("--max-count=" . $maxcount),
3580                 ("--skip=" . $skip),
3581                 @extra_options,
3582                 $commit_id,
3583                 "--",
3584                 ($filename ? ($filename) : ())
3585                 or die_error(500, "Open git-rev-list failed");
3586         while (my $line = <$fd>) {
3587                 my %co = parse_commit_text($line);
3588                 push @cos, \%co;
3589         }
3590         close $fd;
3591
3592         return wantarray ? @cos : \@cos;
3593 }
3594
3595 # parse line of git-diff-tree "raw" output
3596 sub parse_difftree_raw_line {
3597         my $line = shift;
3598         my %res;
3599
3600         # ':100644 100644 03b218260e99b78c6df0ed378e59ed9205ccc96d 3b93d5e7cc7f7dd4ebed13a5cc1a4ad976fc94d8 M   ls-files.c'
3601         # ':100644 100644 7f9281985086971d3877aca27704f2aaf9c448ce bc190ebc71bbd923f2b728e505408f5e54bd073a M   rev-tree.c'
3602         if ($line =~ m/^:([0-7]{6}) ([0-7]{6}) ([0-9a-fA-F]{40}) ([0-9a-fA-F]{40}) (.)([0-9]{0,3})\t(.*)$/) {
3603                 $res{'from_mode'} = $1;
3604                 $res{'to_mode'} = $2;
3605                 $res{'from_id'} = $3;
3606                 $res{'to_id'} = $4;
3607                 $res{'status'} = $5;
3608                 $res{'similarity'} = $6;
3609                 if ($res{'status'} eq 'R' || $res{'status'} eq 'C') { # renamed or copied
3610                         ($res{'from_file'}, $res{'to_file'}) = map { unquote($_) } split("\t", $7);
3611                 } else {
3612                         $res{'from_file'} = $res{'to_file'} = $res{'file'} = unquote($7);
3613                 }
3614         }
3615         # '::100755 100755 100755 60e79ca1b01bc8b057abe17ddab484699a7f5fdb 94067cc5f73388f33722d52ae02f44692bc07490 94067cc5f73388f33722d52ae02f44692bc07490 MR git-gui/git-gui.sh'
3616         # combined diff (for merge commit)
3617         elsif ($line =~ s/^(::+)((?:[0-7]{6} )+)((?:[0-9a-fA-F]{40} )+)([a-zA-Z]+)\t(.*)$//) {
3618                 $res{'nparents'}  = length($1);
3619                 $res{'from_mode'} = [ split(' ', $2) ];
3620                 $res{'to_mode'} = pop @{$res{'from_mode'}};
3621                 $res{'from_id'} = [ split(' ', $3) ];
3622                 $res{'to_id'} = pop @{$res{'from_id'}};
3623                 $res{'status'} = [ split('', $4) ];
3624                 $res{'to_file'} = unquote($5);
3625         }
3626         # 'c512b523472485aef4fff9e57b229d9d243c967f'
3627         elsif ($line =~ m/^([0-9a-fA-F]{40})$/) {
3628                 $res{'commit'} = $1;
3629         }
3630
3631         return wantarray ? %res : \%res;
3632 }
3633
3634 # wrapper: return parsed line of git-diff-tree "raw" output
3635 # (the argument might be raw line, or parsed info)
3636 sub parsed_difftree_line {
3637         my $line_or_ref = shift;
3638
3639         if (ref($line_or_ref) eq "HASH") {
3640                 # pre-parsed (or generated by hand)
3641                 return $line_or_ref;
3642         } else {
3643                 return parse_difftree_raw_line($line_or_ref);
3644         }
3645 }
3646
3647 # parse line of git-ls-tree output
3648 sub parse_ls_tree_line {
3649         my $line = shift;
3650         my %opts = @_;
3651         my %res;
3652
3653         if ($opts{'-l'}) {
3654                 #'100644 blob 0fa3f3a66fb6a137f6ec2c19351ed4d807070ffa   16717  panic.c'
3655                 $line =~ m/^([0-9]+) (.+) ([0-9a-fA-F]{40}) +(-|[0-9]+)\t(.+)$/s;
3656
3657                 $res{'mode'} = $1;
3658                 $res{'type'} = $2;
3659                 $res{'hash'} = $3;
3660                 $res{'size'} = $4;
3661                 if ($opts{'-z'}) {
3662                         $res{'name'} = $5;
3663                 } else {
3664                         $res{'name'} = unquote($5);
3665                 }
3666         } else {
3667                 #'100644 blob 0fa3f3a66fb6a137f6ec2c19351ed4d807070ffa  panic.c'
3668                 $line =~ m/^([0-9]+) (.+) ([0-9a-fA-F]{40})\t(.+)$/s;
3669
3670                 $res{'mode'} = $1;
3671                 $res{'type'} = $2;
3672                 $res{'hash'} = $3;
3673                 if ($opts{'-z'}) {
3674                         $res{'name'} = $4;
3675                 } else {
3676                         $res{'name'} = unquote($4);
3677                 }
3678         }
3679
3680         return wantarray ? %res : \%res;
3681 }
3682
3683 # generates _two_ hashes, references to which are passed as 2 and 3 argument
3684 sub parse_from_to_diffinfo {
3685         my ($diffinfo, $from, $to, @parents) = @_;
3686
3687         if ($diffinfo->{'nparents'}) {
3688                 # combined diff
3689                 $from->{'file'} = [];
3690                 $from->{'href'} = [];
3691                 fill_from_file_info($diffinfo, @parents)
3692                         unless exists $diffinfo->{'from_file'};
3693                 for (my $i = 0; $i < $diffinfo->{'nparents'}; $i++) {
3694                         $from->{'file'}[$i] =
3695                                 defined $diffinfo->{'from_file'}[$i] ?
3696                                         $diffinfo->{'from_file'}[$i] :
3697                                         $diffinfo->{'to_file'};
3698                         if ($diffinfo->{'status'}[$i] ne "A") { # not new (added) file
3699                                 $from->{'href'}[$i] = href(action=>"blob",
3700                                                            hash_base=>$parents[$i],
3701                                                            hash=>$diffinfo->{'from_id'}[$i],
3702                                                            file_name=>$from->{'file'}[$i]);
3703                         } else {
3704                                 $from->{'href'}[$i] = undef;
3705                         }
3706                 }
3707         } else {
3708                 # ordinary (not combined) diff
3709                 $from->{'file'} = $diffinfo->{'from_file'};
3710                 if ($diffinfo->{'status'} ne "A") { # not new (added) file
3711                         $from->{'href'} = href(action=>"blob", hash_base=>$hash_parent,
3712                                                hash=>$diffinfo->{'from_id'},
3713                                                file_name=>$from->{'file'});
3714                 } else {
3715                         delete $from->{'href'};
3716                 }
3717         }
3718
3719         $to->{'file'} = $diffinfo->{'to_file'};
3720         if (!is_deleted($diffinfo)) { # file exists in result
3721                 $to->{'href'} = href(action=>"blob", hash_base=>$hash,
3722                                      hash=>$diffinfo->{'to_id'},
3723                                      file_name=>$to->{'file'});
3724         } else {
3725                 delete $to->{'href'};
3726         }
3727 }
3728
3729 ## ......................................................................
3730 ## parse to array of hashes functions
3731
3732 sub git_get_heads_list {
3733         my ($limit, @classes) = @_;
3734         @classes = get_branch_refs() unless @classes;
3735         my @patterns = map { "refs/$_" } @classes;
3736         my @headslist;
3737
3738         open my $fd, '-|', git_cmd(), 'for-each-ref',
3739                 ($limit ? '--count='.($limit+1) : ()), '--sort=-committerdate',
3740                 '--format=%(objectname) %(refname) %(subject)%00%(committer)',
3741                 @patterns
3742                 or return;
3743         while (my $line = <$fd>) {
3744                 my %ref_item;
3745
3746                 chomp $line;
3747                 my ($refinfo, $committerinfo) = split(/\0/, $line);
3748                 my ($hash, $name, $title) = split(' ', $refinfo, 3);
3749                 my ($committer, $epoch, $tz) =
3750                         ($committerinfo =~ /^(.*) ([0-9]+) (.*)$/);
3751                 $ref_item{'fullname'}  = $name;
3752                 my $strip_refs = join '|', map { quotemeta } get_branch_refs();
3753                 $name =~ s!^refs/($strip_refs|remotes)/!!;
3754                 $ref_item{'name'} = $name;
3755                 # for refs neither in 'heads' nor 'remotes' we want to
3756                 # show their ref dir
3757                 my $ref_dir = (defined $1) ? $1 : '';
3758                 if ($ref_dir ne '' and $ref_dir ne 'heads' and $ref_dir ne 'remotes') {
3759                     $ref_item{'name'} .= ' (' . $ref_dir . ')';
3760                 }
3761
3762                 $ref_item{'id'}    = $hash;
3763                 $ref_item{'title'} = $title || '(no commit message)';
3764                 $ref_item{'epoch'} = $epoch;
3765                 if ($epoch) {
3766                         $ref_item{'age'} = age_string(time - $ref_item{'epoch'});
3767                 } else {
3768                         $ref_item{'age'} = "unknown";
3769                 }
3770
3771                 push @headslist, \%ref_item;
3772         }
3773         close $fd;
3774
3775         return wantarray ? @headslist : \@headslist;
3776 }
3777
3778 sub git_get_tags_list {
3779         my $limit = shift;
3780         my @tagslist;
3781
3782         open my $fd, '-|', git_cmd(), 'for-each-ref',
3783                 ($limit ? '--count='.($limit+1) : ()), '--sort=-creatordate',
3784                 '--format=%(objectname) %(objecttype) %(refname) '.
3785                 '%(*objectname) %(*objecttype) %(subject)%00%(creator)',
3786                 'refs/tags'
3787                 or return;
3788         while (my $line = <$fd>) {
3789                 my %ref_item;
3790
3791                 chomp $line;
3792                 my ($refinfo, $creatorinfo) = split(/\0/, $line);
3793                 my ($id, $type, $name, $refid, $reftype, $title) = split(' ', $refinfo, 6);
3794                 my ($creator, $epoch, $tz) =
3795                         ($creatorinfo =~ /^(.*) ([0-9]+) (.*)$/);
3796                 $ref_item{'fullname'} = $name;
3797                 $name =~ s!^refs/tags/!!;
3798
3799                 $ref_item{'type'} = $type;
3800                 $ref_item{'id'} = $id;
3801                 $ref_item{'name'} = $name;
3802                 if ($type eq "tag") {
3803                         $ref_item{'subject'} = $title;
3804                         $ref_item{'reftype'} = $reftype;
3805                         $ref_item{'refid'}   = $refid;
3806                 } else {
3807                         $ref_item{'reftype'} = $type;
3808                         $ref_item{'refid'}   = $id;
3809                 }
3810
3811                 if ($type eq "tag" || $type eq "commit") {
3812                         $ref_item{'epoch'} = $epoch;
3813                         if ($epoch) {
3814                                 $ref_item{'age'} = age_string(time - $ref_item{'epoch'});
3815                         } else {
3816                                 $ref_item{'age'} = "unknown";
3817                         }
3818                 }
3819
3820                 push @tagslist, \%ref_item;
3821         }
3822         close $fd;
3823
3824         return wantarray ? @tagslist : \@tagslist;
3825 }
3826
3827 ## ----------------------------------------------------------------------
3828 ## filesystem-related functions
3829
3830 sub get_file_owner {
3831         my $path = shift;
3832
3833         my ($dev, $ino, $mode, $nlink, $st_uid, $st_gid, $rdev, $size) = stat($path);
3834         my ($name, $passwd, $uid, $gid, $quota, $comment, $gcos, $dir, $shell) = getpwuid($st_uid);
3835         if (!defined $gcos) {
3836                 return undef;
3837         }
3838         my $owner = $gcos;
3839         $owner =~ s/[,;].*$//;
3840         return to_utf8($owner);
3841 }
3842
3843 # assume that file exists
3844 sub insert_file {
3845         my $filename = shift;
3846
3847         open my $fd, '<', $filename;
3848         print map { to_utf8($_) } <$fd>;
3849         close $fd;
3850 }
3851
3852 ## ......................................................................
3853 ## mimetype related functions
3854
3855 sub mimetype_guess_file {
3856         my $filename = shift;
3857         my $mimemap = shift;
3858         -r $mimemap or return undef;
3859
3860         my %mimemap;
3861         open(my $mh, '<', $mimemap) or return undef;
3862         while (<$mh>) {
3863                 next if m/^#/; # skip comments
3864                 my ($mimetype, @exts) = split(/\s+/);
3865                 foreach my $ext (@exts) {
3866                         $mimemap{$ext} = $mimetype;
3867                 }
3868         }
3869         close($mh);
3870
3871         $filename =~ /\.([^.]*)$/;
3872         return $mimemap{$1};
3873 }
3874
3875 sub mimetype_guess {
3876         my $filename = shift;
3877         my $mime;
3878         $filename =~ /\./ or return undef;
3879
3880         if ($mimetypes_file) {
3881                 my $file = $mimetypes_file;
3882                 if ($file !~ m!^/!) { # if it is relative path
3883                         # it is relative to project
3884                         $file = "$projectroot/$project/$file";
3885                 }
3886                 $mime = mimetype_guess_file($filename, $file);
3887         }
3888         $mime ||= mimetype_guess_file($filename, '/etc/mime.types');
3889         return $mime;
3890 }
3891
3892 sub blob_mimetype {
3893         my $fd = shift;
3894         my $filename = shift;
3895
3896         if ($filename) {
3897                 my $mime = mimetype_guess($filename);
3898                 $mime and return $mime;
3899         }
3900
3901         # just in case
3902         return $default_blob_plain_mimetype unless $fd;
3903
3904         if (-T $fd) {
3905                 return 'text/plain';
3906         } elsif (! $filename) {
3907                 return 'application/octet-stream';
3908         } elsif ($filename =~ m/\.png$/i) {
3909                 return 'image/png';
3910         } elsif ($filename =~ m/\.gif$/i) {
3911                 return 'image/gif';
3912         } elsif ($filename =~ m/\.jpe?g$/i) {
3913                 return 'image/jpeg';
3914         } else {
3915                 return 'application/octet-stream';
3916         }
3917 }
3918
3919 sub blob_contenttype {
3920         my ($fd, $file_name, $type) = @_;
3921
3922         $type ||= blob_mimetype($fd, $file_name);
3923         if ($type eq 'text/plain' && defined $default_text_plain_charset) {
3924                 $type .= "; charset=$default_text_plain_charset";
3925         }
3926
3927         return $type;
3928 }
3929
3930 # guess file syntax for syntax highlighting; return undef if no highlighting
3931 # the name of syntax can (in the future) depend on syntax highlighter used
3932 sub guess_file_syntax {
3933         my ($highlight, $file_name) = @_;
3934         return undef unless ($highlight && defined $file_name);
3935         my $basename = basename($file_name, '.in');
3936         return $highlight_basename{$basename}
3937                 if exists $highlight_basename{$basename};
3938
3939         $basename =~ /\.([^.]*)$/;
3940         my $ext = $1 or return undef;
3941         return $highlight_ext{$ext}
3942                 if exists $highlight_ext{$ext};
3943
3944         return undef;
3945 }
3946
3947 # run highlighter and return FD of its output,
3948 # or return original FD if no highlighting
3949 sub run_highlighter {
3950         my ($fd, $highlight, $syntax) = @_;
3951         return $fd unless ($highlight);
3952
3953         close $fd;
3954         my $syntax_arg = (defined $syntax) ? "--syntax $syntax" : "--force";
3955         open $fd, quote_command(git_cmd(), "cat-file", "blob", $hash)." | ".
3956                   quote_command($^X, '-CO', '-MEncode=decode,FB_DEFAULT', '-pse',
3957                     '$_ = decode($fe, $_, FB_DEFAULT) if !utf8::decode($_);',
3958                     '--', "-fe=$fallback_encoding")." | ".
3959                   quote_command($highlight_bin).
3960                   " --replace-tabs=8 --fragment $syntax_arg |"
3961                 or die_error(500, "Couldn't open file or run syntax highlighter");
3962         return $fd;
3963 }
3964
3965 ## ======================================================================
3966 ## functions printing HTML: header, footer, error page
3967
3968 sub get_page_title {
3969         my $title = to_utf8($site_name);
3970
3971         unless (defined $project) {
3972                 if (defined $project_filter) {
3973                         $title .= " - projects in '" . esc_path($project_filter) . "'";
3974                 }
3975                 return $title;
3976         }
3977         $title .= " - " . to_utf8($project);
3978
3979         return $title unless (defined $action);
3980         $title .= "/$action"; # $action is US-ASCII (7bit ASCII)
3981
3982         return $title unless (defined $file_name);
3983         $title .= " - " . esc_path($file_name);
3984         if ($action eq "tree" && $file_name !~ m|/$|) {
3985                 $title .= "/";
3986         }
3987
3988         return $title;
3989 }
3990
3991 sub get_content_type_html {
3992         # require explicit support from the UA if we are to send the page as
3993         # 'application/xhtml+xml', otherwise send it as plain old 'text/html'.
3994         # we have to do this because MSIE sometimes globs '*/*', pretending to
3995         # support xhtml+xml but choking when it gets what it asked for.
3996         if (defined $cgi->http('HTTP_ACCEPT') &&
3997             $cgi->http('HTTP_ACCEPT') =~ m/(,|;|\s|^)application\/xhtml\+xml(,|;|\s|$)/ &&
3998             $cgi->Accept('application/xhtml+xml') != 0) {
3999                 return 'application/xhtml+xml';
4000         } else {
4001                 return 'text/html';
4002         }
4003 }
4004
4005 sub print_feed_meta {
4006         if (defined $project) {
4007                 my %href_params = get_feed_info();
4008                 if (!exists $href_params{'-title'}) {
4009                         $href_params{'-title'} = 'log';
4010                 }
4011
4012                 foreach my $format (qw(RSS Atom)) {
4013                         my $type = lc($format);
4014                         my %link_attr = (
4015                                 '-rel' => 'alternate',
4016                                 '-title' => esc_attr("$project - $href_params{'-title'} - $format feed"),
4017                                 '-type' => "application/$type+xml"
4018                         );
4019
4020                         $href_params{'extra_options'} = undef;
4021                         $href_params{'action'} = $type;
4022                         $link_attr{'-href'} = href(%href_params);
4023                         print "<link ".
4024                               "rel=\"$link_attr{'-rel'}\" ".
4025                               "title=\"$link_attr{'-title'}\" ".
4026                               "href=\"$link_attr{'-href'}\" ".
4027                               "type=\"$link_attr{'-type'}\" ".
4028                               "/>\n";
4029
4030                         $href_params{'extra_options'} = '--no-merges';
4031                         $link_attr{'-href'} = href(%href_params);
4032                         $link_attr{'-title'} .= ' (no merges)';
4033                         print "<link ".
4034                               "rel=\"$link_attr{'-rel'}\" ".
4035                               "title=\"$link_attr{'-title'}\" ".
4036                               "href=\"$link_attr{'-href'}\" ".
4037                               "type=\"$link_attr{'-type'}\" ".
4038                               "/>\n";
4039                 }
4040
4041         } else {
4042                 printf('<link rel="alternate" title="%s projects list" '.
4043                        'href="%s" type="text/plain; charset=utf-8" />'."\n",
4044                        esc_attr($site_name), href(project=>undef, action=>"project_index"));
4045                 printf('<link rel="alternate" title="%s projects feeds" '.
4046                        'href="%s" type="text/x-opml" />'."\n",
4047                        esc_attr($site_name), href(project=>undef, action=>"opml"));
4048         }
4049 }
4050
4051 sub print_header_links {
4052         my $status = shift;
4053
4054         # print out each stylesheet that exist, providing backwards capability
4055         # for those people who defined $stylesheet in a config file
4056         if (defined $stylesheet) {
4057                 print '<link rel="stylesheet" type="text/css" href="'.esc_url($stylesheet).'"/>'."\n";
4058         } else {
4059                 foreach my $stylesheet (@stylesheets) {
4060                         next unless $stylesheet;
4061                         print '<link rel="stylesheet" type="text/css" href="'.esc_url($stylesheet).'"/>'."\n";
4062                 }
4063         }
4064         print_feed_meta()
4065                 if ($status eq '200 OK');
4066         if (defined $favicon) {
4067                 print qq(<link rel="shortcut icon" href=").esc_url($favicon).qq(" type="image/png" />\n);
4068         }
4069 }
4070
4071 sub print_nav_breadcrumbs_path {
4072         my $dirprefix = undef;
4073         while (my $part = shift) {
4074                 $dirprefix .= "/" if defined $dirprefix;
4075                 $dirprefix .= $part;
4076                 print $cgi->a({-href => href(project => undef,
4077                                              project_filter => $dirprefix,
4078                                              action => "project_list")},
4079                               esc_html($part)) . " / ";
4080         }
4081 }
4082
4083 sub print_nav_breadcrumbs {
4084         my %opts = @_;
4085
4086         for my $crumb (@extra_breadcrumbs, [ $home_link_str => $home_link ]) {
4087                 print $cgi->a({-href => esc_url($crumb->[1])}, $crumb->[0]) . " / ";
4088         }
4089         if (defined $project) {
4090                 my @dirname = split '/', $project;
4091                 my $projectbasename = pop @dirname;
4092                 print_nav_breadcrumbs_path(@dirname);
4093                 print $cgi->a({-href => href(action=>"summary")}, esc_html($projectbasename));
4094                 if (defined $action) {
4095                         my $action_print = $action ;
4096                         if (defined $opts{-action_extra}) {
4097                                 $action_print = $cgi->a({-href => href(action=>$action)},
4098                                         $action);
4099                         }
4100                         print " / $action_print";
4101                 }
4102                 if (defined $opts{-action_extra}) {
4103                         print " / $opts{-action_extra}";
4104                 }
4105                 print "\n";
4106         } elsif (defined $project_filter) {
4107                 print_nav_breadcrumbs_path(split '/', $project_filter);
4108         }
4109 }
4110
4111 sub print_search_form {
4112         if (!defined $searchtext) {
4113                 $searchtext = "";
4114         }
4115         my $search_hash;
4116         if (defined $hash_base) {
4117                 $search_hash = $hash_base;
4118         } elsif (defined $hash) {
4119                 $search_hash = $hash;
4120         } else {
4121                 $search_hash = "HEAD";
4122         }
4123         my $action = $my_uri;
4124         my $use_pathinfo = gitweb_check_feature('pathinfo');
4125         if ($use_pathinfo) {
4126                 $action .= "/".esc_url($project);
4127         }
4128         print $cgi->start_form(-method => "get", -action => $action) .
4129               "<div class=\"search\">\n" .
4130               (!$use_pathinfo &&
4131               $cgi->input({-name=>"p", -value=>$project, -type=>"hidden"}) . "\n") .
4132               $cgi->input({-name=>"a", -value=>"search", -type=>"hidden"}) . "\n" .
4133               $cgi->input({-name=>"h", -value=>$search_hash, -type=>"hidden"}) . "\n" .
4134               $cgi->popup_menu(-name => 'st', -default => 'commit',
4135                                -values => ['commit', 'grep', 'author', 'committer', 'pickaxe']) .
4136               " " . $cgi->a({-href => href(action=>"search_help"),
4137                              -title => "search help" }, "?") . " search:\n",
4138               $cgi->textfield(-name => "s", -value => $searchtext, -override => 1) . "\n" .
4139               "<span title=\"Extended regular expression\">" .
4140               $cgi->checkbox(-name => 'sr', -value => 1, -label => 're',
4141                              -checked => $search_use_regexp) .
4142               "</span>" .
4143               "</div>" .
4144               $cgi->end_form() . "\n";
4145 }
4146
4147 sub git_header_html {
4148         my $status = shift || "200 OK";
4149         my $expires = shift;
4150         my %opts = @_;
4151
4152         my $title = get_page_title();
4153         my $content_type = get_content_type_html();
4154         print $cgi->header(-type=>$content_type, -charset => 'utf-8',
4155                            -status=> $status, -expires => $expires)
4156                 unless ($opts{'-no_http_header'});
4157         my $mod_perl_version = $ENV{'MOD_PERL'} ? " $ENV{'MOD_PERL'}" : '';
4158         print <<EOF;
4159 <?xml version="1.0" encoding="utf-8"?>
4160 <!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Strict//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-strict.dtd">
4161 <html xmlns="http://www.w3.org/1999/xhtml" xml:lang="en-US" lang="en-US">
4162 <!-- git web interface version $version, (C) 2005-2006, Kay Sievers <kay.sievers\@vrfy.org>, Christian Gierke -->
4163 <!-- git core binaries version $git_version -->
4164 <head>
4165 <meta http-equiv="content-type" content="$content_type; charset=utf-8"/>
4166 <meta name="generator" content="gitweb/$version git/$git_version$mod_perl_version"/>
4167 <meta name="robots" content="index, nofollow"/>
4168 <title>$title</title>
4169 EOF
4170         # the stylesheet, favicon etc urls won't work correctly with path_info
4171         # unless we set the appropriate base URL
4172         if ($ENV{'PATH_INFO'}) {
4173                 print "<base href=\"".esc_url($base_url)."\" />\n";
4174         }
4175         print_header_links($status);
4176
4177         if (defined $site_html_head_string) {
4178                 print to_utf8($site_html_head_string);
4179         }
4180
4181         print "</head>\n" .
4182               "<body>\n";
4183
4184         if (defined $site_header && -f $site_header) {
4185                 insert_file($site_header);
4186         }
4187
4188         print "<div class=\"page_header\">\n";
4189         if (defined $logo) {
4190                 print $cgi->a({-href => esc_url($logo_url),
4191                                -title => $logo_label},
4192                               $cgi->img({-src => esc_url($logo),
4193                                          -width => 72, -height => 27,
4194                                          -alt => "git",
4195                                          -class => "logo"}));
4196         }
4197         print_nav_breadcrumbs(%opts);
4198         print "</div>\n";
4199
4200         my $have_search = gitweb_check_feature('search');
4201         if (defined $project && $have_search) {
4202                 print_search_form();
4203         }
4204 }
4205
4206 sub git_footer_html {
4207         my $feed_class = 'rss_logo';
4208
4209         print "<div class=\"page_footer\">\n";
4210         if (defined $project) {
4211                 my $descr = git_get_project_description($project);
4212                 if (defined $descr) {
4213                         print "<div class=\"page_footer_text\">" . esc_html($descr) . "</div>\n";
4214                 }
4215
4216                 my %href_params = get_feed_info();
4217                 if (!%href_params) {
4218                         $feed_class .= ' generic';
4219                 }
4220                 $href_params{'-title'} ||= 'log';
4221
4222                 foreach my $format (qw(RSS Atom)) {
4223                         $href_params{'action'} = lc($format);
4224                         print $cgi->a({-href => href(%href_params),
4225                                       -title => "$href_params{'-title'} $format feed",
4226                                       -class => $feed_class}, $format)."\n";
4227                 }
4228
4229         } else {
4230                 print $cgi->a({-href => href(project=>undef, action=>"opml",
4231                                              project_filter => $project_filter),
4232                               -class => $feed_class}, "OPML") . " ";
4233                 print $cgi->a({-href => href(project=>undef, action=>"project_index",
4234                                              project_filter => $project_filter),
4235                               -class => $feed_class}, "TXT") . "\n";
4236         }
4237         print "</div>\n"; # class="page_footer"
4238
4239         if (defined $t0 && gitweb_check_feature('timed')) {
4240                 print "<div id=\"generating_info\">\n";
4241                 print 'This page took '.
4242                       '<span id="generating_time" class="time_span">'.
4243                       tv_interval($t0, [ gettimeofday() ]).
4244                       ' seconds </span>'.
4245                       ' and '.
4246                       '<span id="generating_cmd">'.
4247                       $number_of_git_cmds.
4248                       '</span> git commands '.
4249                       " to generate.\n";
4250                 print "</div>\n"; # class="page_footer"
4251         }
4252
4253         if (defined $site_footer && -f $site_footer) {
4254                 insert_file($site_footer);
4255         }
4256
4257         print qq!<script type="text/javascript" src="!.esc_url($javascript).qq!"></script>\n!;
4258         if (defined $action &&
4259             $action eq 'blame_incremental') {
4260                 print qq!<script type="text/javascript">\n!.
4261                       qq!startBlame("!. href(action=>"blame_data", -replay=>1) .qq!",\n!.
4262                       qq!           "!. href() .qq!");\n!.
4263                       qq!</script>\n!;
4264         } else {
4265                 my ($jstimezone, $tz_cookie, $datetime_class) =
4266                         gitweb_get_feature('javascript-timezone');
4267
4268                 print qq!<script type="text/javascript">\n!.
4269                       qq!window.onload = function () {\n!;
4270                 if (gitweb_check_feature('javascript-actions')) {
4271                         print qq!       fixLinks();\n!;
4272                 }
4273                 if ($jstimezone && $tz_cookie && $datetime_class) {
4274                         print qq!       var tz_cookie = { name: '$tz_cookie', expires: 14, path: '/' };\n!. # in days
4275                               qq!       onloadTZSetup('$jstimezone', tz_cookie, '$datetime_class');\n!;
4276                 }
4277                 print qq!};\n!.
4278                       qq!</script>\n!;
4279         }
4280
4281         print "</body>\n" .
4282               "</html>";
4283 }
4284
4285 # die_error(<http_status_code>, <error_message>[, <detailed_html_description>])
4286 # Example: die_error(404, 'Hash not found')
4287 # By convention, use the following status codes (as defined in RFC 2616):
4288 # 400: Invalid or missing CGI parameters, or
4289 #      requested object exists but has wrong type.
4290 # 403: Requested feature (like "pickaxe" or "snapshot") not enabled on
4291 #      this server or project.
4292 # 404: Requested object/revision/project doesn't exist.
4293 # 500: The server isn't configured properly, or
4294 #      an internal error occurred (e.g. failed assertions caused by bugs), or
4295 #      an unknown error occurred (e.g. the git binary died unexpectedly).
4296 # 503: The server is currently unavailable (because it is overloaded,
4297 #      or down for maintenance).  Generally, this is a temporary state.
4298 sub die_error {
4299         my $status = shift || 500;
4300         my $error = esc_html(shift) || "Internal Server Error";
4301         my $extra = shift;
4302         my %opts = @_;
4303
4304         my %http_responses = (
4305                 400 => '400 Bad Request',
4306                 403 => '403 Forbidden',
4307                 404 => '404 Not Found',
4308                 500 => '500 Internal Server Error',
4309                 503 => '503 Service Unavailable',
4310         );
4311         git_header_html($http_responses{$status}, undef, %opts);
4312         print <<EOF;
4313 <div class="page_body">
4314 <br /><br />
4315 $status - $error
4316 <br />
4317 EOF
4318         if (defined $extra) {
4319                 print "<hr />\n" .
4320                       "$extra\n";
4321         }
4322         print "</div>\n";
4323
4324         git_footer_html();
4325         goto DONE_GITWEB
4326                 unless ($opts{'-error_handler'});
4327 }
4328
4329 ## ----------------------------------------------------------------------
4330 ## functions printing or outputting HTML: navigation
4331
4332 sub git_print_page_nav {
4333         my ($current, $suppress, $head, $treehead, $treebase, $extra) = @_;
4334         $extra = '' if !defined $extra; # pager or formats
4335
4336         my @navs = qw(summary shortlog log commit commitdiff tree);
4337         if ($suppress) {
4338                 @navs = grep { $_ ne $suppress } @navs;
4339         }
4340
4341         my %arg = map { $_ => {action=>$_} } @navs;
4342         if (defined $head) {
4343                 for (qw(commit commitdiff)) {
4344                         $arg{$_}{'hash'} = $head;
4345                 }
4346                 if ($current =~ m/^(tree | log | shortlog | commit | commitdiff | search)$/x) {
4347                         for (qw(shortlog log)) {
4348                                 $arg{$_}{'hash'} = $head;
4349                         }
4350                 }
4351         }
4352
4353         $arg{'tree'}{'hash'} = $treehead if defined $treehead;
4354         $arg{'tree'}{'hash_base'} = $treebase if defined $treebase;
4355
4356         my @actions = gitweb_get_feature('actions');
4357         my %repl = (
4358                 '%' => '%',
4359                 'n' => $project,         # project name
4360                 'f' => $git_dir,         # project path within filesystem
4361                 'h' => $treehead || '',  # current hash ('h' parameter)
4362                 'b' => $treebase || '',  # hash base ('hb' parameter)
4363         );
4364         while (@actions) {
4365                 my ($label, $link, $pos) = splice(@actions,0,3);
4366                 # insert
4367                 @navs = map { $_ eq $pos ? ($_, $label) : $_ } @navs;
4368                 # munch munch
4369                 $link =~ s/%([%nfhb])/$repl{$1}/g;
4370                 $arg{$label}{'_href'} = $link;
4371         }
4372
4373         print "<div class=\"page_nav\">\n" .
4374                 (join " | ",
4375                  map { $_ eq $current ?
4376                        $_ : $cgi->a({-href => ($arg{$_}{_href} ? $arg{$_}{_href} : href(%{$arg{$_}}))}, "$_")
4377                  } @navs);
4378         print "<br/>\n$extra<br/>\n" .
4379               "</div>\n";
4380 }
4381
4382 # returns a submenu for the navigation of the refs views (tags, heads,
4383 # remotes) with the current view disabled and the remotes view only
4384 # available if the feature is enabled
4385 sub format_ref_views {
4386         my ($current) = @_;
4387         my @ref_views = qw{tags heads};
4388         push @ref_views, 'remotes' if gitweb_check_feature('remote_heads');
4389         return join " | ", map {
4390                 $_ eq $current ? $_ :
4391                 $cgi->a({-href => href(action=>$_)}, $_)
4392         } @ref_views
4393 }
4394
4395 sub format_paging_nav {
4396         my ($action, $page, $has_next_link) = @_;
4397         my $paging_nav;
4398
4399
4400         if ($page > 0) {
4401                 $paging_nav .=
4402                         $cgi->a({-href => href(-replay=>1, page=>undef)}, "first") .
4403                         " &sdot; " .
4404                         $cgi->a({-href => href(-replay=>1, page=>$page-1),
4405                                  -accesskey => "p", -title => "Alt-p"}, "prev");
4406         } else {
4407                 $paging_nav .= "first &sdot; prev";
4408         }
4409
4410         if ($has_next_link) {
4411                 $paging_nav .= " &sdot; " .
4412                         $cgi->a({-href => href(-replay=>1, page=>$page+1),
4413                                  -accesskey => "n", -title => "Alt-n"}, "next");
4414         } else {
4415                 $paging_nav .= " &sdot; next";
4416         }
4417
4418         return $paging_nav;
4419 }
4420
4421 ## ......................................................................
4422 ## functions printing or outputting HTML: div
4423
4424 sub git_print_header_div {
4425         my ($action, $title, $hash, $hash_base) = @_;
4426         my %args = ();
4427
4428         $args{'action'} = $action;
4429         $args{'hash'} = $hash if $hash;
4430         $args{'hash_base'} = $hash_base if $hash_base;
4431
4432         print "<div class=\"header\">\n" .
4433               $cgi->a({-href => href(%args), -class => "title"},
4434               $title ? $title : $action) .
4435               "\n</div>\n";
4436 }
4437
4438 sub format_repo_url {
4439         my ($name, $url) = @_;
4440         return "<tr class=\"metadata_url\"><td>$name</td><td>$url</td></tr>\n";
4441 }
4442
4443 # Group output by placing it in a DIV element and adding a header.
4444 # Options for start_div() can be provided by passing a hash reference as the
4445 # first parameter to the function.
4446 # Options to git_print_header_div() can be provided by passing an array
4447 # reference. This must follow the options to start_div if they are present.
4448 # The content can be a scalar, which is output as-is, a scalar reference, which
4449 # is output after html escaping, an IO handle passed either as *handle or
4450 # *handle{IO}, or a function reference. In the latter case all following
4451 # parameters will be taken as argument to the content function call.
4452 sub git_print_section {
4453         my ($div_args, $header_args, $content);
4454         my $arg = shift;
4455         if (ref($arg) eq 'HASH') {
4456                 $div_args = $arg;
4457                 $arg = shift;
4458         }
4459         if (ref($arg) eq 'ARRAY') {
4460                 $header_args = $arg;
4461                 $arg = shift;
4462         }
4463         $content = $arg;
4464
4465         print $cgi->start_div($div_args);
4466         git_print_header_div(@$header_args);
4467
4468         if (ref($content) eq 'CODE') {
4469                 $content->(@_);
4470         } elsif (ref($content) eq 'SCALAR') {
4471                 print esc_html($$content);
4472         } elsif (ref($content) eq 'GLOB' or ref($content) eq 'IO::Handle') {
4473                 print <$content>;
4474         } elsif (!ref($content) && defined($content)) {
4475                 print $content;
4476         }
4477
4478         print $cgi->end_div;
4479 }
4480
4481 sub format_timestamp_html {
4482         my $date = shift;
4483         my $strtime = $date->{'rfc2822'};
4484
4485         my (undef, undef, $datetime_class) =
4486                 gitweb_get_feature('javascript-timezone');
4487         if ($datetime_class) {
4488                 $strtime = qq!<span class="$datetime_class">$strtime</span>!;
4489         }
4490
4491         my $localtime_format = '(%02d:%02d %s)';
4492         if ($date->{'hour_local'} < 6) {
4493                 $localtime_format = '(<span class="atnight">%02d:%02d</span> %s)';
4494         }
4495         $strtime .= ' ' .
4496                     sprintf($localtime_format,
4497                             $date->{'hour_local'}, $date->{'minute_local'}, $date->{'tz_local'});
4498
4499         return $strtime;
4500 }
4501
4502 # Outputs the author name and date in long form
4503 sub git_print_authorship {
4504         my $co = shift;
4505         my %opts = @_;
4506         my $tag = $opts{-tag} || 'div';
4507         my $author = $co->{'author_name'};
4508
4509         my %ad = parse_date($co->{'author_epoch'}, $co->{'author_tz'});
4510         print "<$tag class=\"author_date\">" .
4511               format_search_author($author, "author", esc_html($author)) .
4512               " [".format_timestamp_html(\%ad)."]".
4513               git_get_avatar($co->{'author_email'}, -pad_before => 1) .
4514               "</$tag>\n";
4515 }
4516
4517 # Outputs table rows containing the full author or committer information,
4518 # in the format expected for 'commit' view (& similar).
4519 # Parameters are a commit hash reference, followed by the list of people
4520 # to output information for. If the list is empty it defaults to both
4521 # author and committer.
4522 sub git_print_authorship_rows {
4523         my $co = shift;
4524         # too bad we can't use @people = @_ || ('author', 'committer')
4525         my @people = @_;
4526         @people = ('author', 'committer') unless @people;
4527         foreach my $who (@people) {
4528                 my %wd = parse_date($co->{"${who}_epoch"}, $co->{"${who}_tz"});
4529                 print "<tr><td>$who</td><td>" .
4530                       format_search_author($co->{"${who}_name"}, $who,
4531                                            esc_html($co->{"${who}_name"})) . " " .
4532                       format_search_author($co->{"${who}_email"}, $who,
4533                                            esc_html("<" . $co->{"${who}_email"} . ">")) .
4534                       "</td><td rowspan=\"2\">" .
4535                       git_get_avatar($co->{"${who}_email"}, -size => 'double') .
4536                       "</td></tr>\n" .
4537                       "<tr>" .
4538                       "<td></td><td>" .
4539                       format_timestamp_html(\%wd) .
4540                       "</td>" .
4541                       "</tr>\n";
4542         }
4543 }
4544
4545 sub git_print_page_path {
4546         my $name = shift;
4547         my $type = shift;
4548         my $hb = shift;
4549
4550
4551         print "<div class=\"page_path\">";
4552         print $cgi->a({-href => href(action=>"tree", hash_base=>$hb),
4553                       -title => 'tree root'}, to_utf8("[$project]"));
4554         print " / ";
4555         if (defined $name) {
4556                 my @dirname = split '/', $name;
4557                 my $basename = pop @dirname;
4558                 my $fullname = '';
4559
4560                 foreach my $dir (@dirname) {
4561                         $fullname .= ($fullname ? '/' : '') . $dir;
4562                         print $cgi->a({-href => href(action=>"tree", file_name=>$fullname,
4563                                                      hash_base=>$hb),
4564                                       -title => $fullname}, esc_path($dir));
4565                         print " / ";
4566                 }
4567                 if (defined $type && $type eq 'blob') {
4568                         print $cgi->a({-href => href(action=>"blob_plain", file_name=>$file_name,
4569                                                      hash_base=>$hb),
4570                                       -title => $name}, esc_path($basename));
4571                 } elsif (defined $type && $type eq 'tree') {
4572                         print $cgi->a({-href => href(action=>"tree", file_name=>$file_name,
4573                                                      hash_base=>$hb),
4574                                       -title => $name}, esc_path($basename));
4575                         print " / ";
4576                 } else {
4577                         print esc_path($basename);
4578                 }
4579         }
4580         print "<br/></div>\n";
4581 }
4582
4583 sub git_print_log {
4584         my $log = shift;
4585         my %opts = @_;
4586
4587         if ($opts{'-remove_title'}) {
4588                 # remove title, i.e. first line of log
4589                 shift @$log;
4590         }
4591         # remove leading empty lines
4592         while (defined $log->[0] && $log->[0] eq "") {
4593                 shift @$log;
4594         }
4595
4596         # print log
4597         my $skip_blank_line = 0;
4598         foreach my $line (@$log) {
4599                 if ($line =~ m/^\s*([A-Z][-A-Za-z]*-[Bb]y|C[Cc]): /) {
4600                         if (! $opts{'-remove_signoff'}) {
4601                                 print "<span class=\"signoff\">" . esc_html($line) . "</span><br/>\n";
4602                                 $skip_blank_line = 1;
4603                         }
4604                         next;
4605                 }
4606
4607                 if ($line =~ m,\s*([a-z]*link): (https?://\S+),i) {
4608                         if (! $opts{'-remove_signoff'}) {
4609                                 print "<span class=\"signoff\">" . esc_html($1) . ": " .
4610                                         "<a href=\"" . esc_html($2) . "\">" . esc_html($2) . "</a>" .
4611                                         "</span><br/>\n";
4612                                 $skip_blank_line = 1;
4613                         }
4614                         next;
4615                 }
4616
4617                 # print only one empty line
4618                 # do not print empty line after signoff
4619                 if ($line eq "") {
4620                         next if ($skip_blank_line);
4621                         $skip_blank_line = 1;
4622                 } else {
4623                         $skip_blank_line = 0;
4624                 }
4625
4626                 print format_log_line_html($line) . "<br/>\n";
4627         }
4628
4629         if ($opts{'-final_empty_line'}) {
4630                 # end with single empty line
4631                 print "<br/>\n" unless $skip_blank_line;
4632         }
4633 }
4634
4635 # return link target (what link points to)
4636 sub git_get_link_target {
4637         my $hash = shift;
4638         my $link_target;
4639
4640         # read link
4641         open my $fd, "-|", git_cmd(), "cat-file", "blob", $hash
4642                 or return;
4643         {
4644                 local $/ = undef;
4645                 $link_target = <$fd>;
4646         }
4647         close $fd
4648                 or return;
4649
4650         return $link_target;
4651 }
4652
4653 # given link target, and the directory (basedir) the link is in,
4654 # return target of link relative to top directory (top tree);
4655 # return undef if it is not possible (including absolute links).
4656 sub normalize_link_target {
4657         my ($link_target, $basedir) = @_;
4658
4659         # absolute symlinks (beginning with '/') cannot be normalized
4660         return if (substr($link_target, 0, 1) eq '/');
4661
4662         # normalize link target to path from top (root) tree (dir)
4663         my $path;
4664         if ($basedir) {
4665                 $path = $basedir . '/' . $link_target;
4666         } else {
4667                 # we are in top (root) tree (dir)
4668                 $path = $link_target;
4669         }
4670
4671         # remove //, /./, and /../
4672         my @path_parts;
4673         foreach my $part (split('/', $path)) {
4674                 # discard '.' and ''
4675                 next if (!$part || $part eq '.');
4676                 # handle '..'
4677                 if ($part eq '..') {
4678                         if (@path_parts) {
4679                                 pop @path_parts;
4680                         } else {
4681                                 # link leads outside repository (outside top dir)
4682                                 return;
4683                         }
4684                 } else {
4685                         push @path_parts, $part;
4686                 }
4687         }
4688         $path = join('/', @path_parts);
4689
4690         return $path;
4691 }
4692
4693 # print tree entry (row of git_tree), but without encompassing <tr> element
4694 sub git_print_tree_entry {
4695         my ($t, $basedir, $hash_base, $have_blame) = @_;
4696
4697         my %base_key = ();
4698         $base_key{'hash_base'} = $hash_base if defined $hash_base;
4699
4700         # The format of a table row is: mode list link.  Where mode is
4701         # the mode of the entry, list is the name of the entry, an href,
4702         # and link is the action links of the entry.
4703
4704         print "<td class=\"mode\">" . mode_str($t->{'mode'}) . "</td>\n";
4705         if (exists $t->{'size'}) {
4706                 print "<td class=\"size\">$t->{'size'}</td>\n";
4707         }
4708         if ($t->{'type'} eq "blob") {
4709                 print "<td class=\"list\">" .
4710                         $cgi->a({-href => href(action=>"blob", hash=>$t->{'hash'},
4711                                                file_name=>"$basedir$t->{'name'}", %base_key),
4712                                 -class => "list"}, esc_path($t->{'name'}));
4713                 if (S_ISLNK(oct $t->{'mode'})) {
4714                         my $link_target = git_get_link_target($t->{'hash'});
4715                         if ($link_target) {
4716                                 my $norm_target = normalize_link_target($link_target, $basedir);
4717                                 if (defined $norm_target) {
4718                                         print " -> " .
4719                                               $cgi->a({-href => href(action=>"object", hash_base=>$hash_base,
4720                                                                      file_name=>$norm_target),
4721                                                        -title => $norm_target}, esc_path($link_target));
4722                                 } else {
4723                                         print " -> " . esc_path($link_target);
4724                                 }
4725                         }
4726                 }
4727                 print "</td>\n";
4728                 print "<td class=\"link\">";
4729                 print $cgi->a({-href => href(action=>"blob", hash=>$t->{'hash'},
4730                                              file_name=>"$basedir$t->{'name'}", %base_key)},
4731                               "blob");
4732                 if ($have_blame) {
4733                         print " | " .
4734                               $cgi->a({-href => href(action=>"blame", hash=>$t->{'hash'},
4735                                                      file_name=>"$basedir$t->{'name'}", %base_key)},
4736                                       "blame");
4737                 }
4738                 if (defined $hash_base) {
4739                         print " | " .
4740                               $cgi->a({-href => href(action=>"history", hash_base=>$hash_base,
4741                                                      hash=>$t->{'hash'}, file_name=>"$basedir$t->{'name'}")},
4742                                       "history");
4743                 }
4744                 print " | " .
4745                         $cgi->a({-href => href(action=>"blob_plain", hash_base=>$hash_base,
4746                                                file_name=>"$basedir$t->{'name'}")},
4747                                 "raw");
4748                 print "</td>\n";
4749
4750         } elsif ($t->{'type'} eq "tree") {
4751                 print "<td class=\"list\">";
4752                 print $cgi->a({-href => href(action=>"tree", hash=>$t->{'hash'},
4753                                              file_name=>"$basedir$t->{'name'}",
4754                                              %base_key)},
4755                               esc_path($t->{'name'}));
4756                 print "</td>\n";
4757                 print "<td class=\"link\">";
4758                 print $cgi->a({-href => href(action=>"tree", hash=>$t->{'hash'},
4759                                              file_name=>"$basedir$t->{'name'}",
4760                                              %base_key)},
4761                               "tree");
4762                 if (defined $hash_base) {
4763                         print " | " .
4764                               $cgi->a({-href => href(action=>"history", hash_base=>$hash_base,
4765                                                      file_name=>"$basedir$t->{'name'}")},
4766                                       "history");
4767                 }
4768                 print "</td>\n";
4769         } else {
4770                 # unknown object: we can only present history for it
4771                 # (this includes 'commit' object, i.e. submodule support)
4772                 print "<td class=\"list\">" .
4773                       esc_path($t->{'name'}) .
4774                       "</td>\n";
4775                 print "<td class=\"link\">";
4776                 if (defined $hash_base) {
4777                         print $cgi->a({-href => href(action=>"history",
4778                                                      hash_base=>$hash_base,
4779                                                      file_name=>"$basedir$t->{'name'}")},
4780                                       "history");
4781                 }
4782                 print "</td>\n";
4783         }
4784 }
4785
4786 ## ......................................................................
4787 ## functions printing large fragments of HTML
4788
4789 # get pre-image filenames for merge (combined) diff
4790 sub fill_from_file_info {
4791         my ($diff, @parents) = @_;
4792
4793         $diff->{'from_file'} = [ ];
4794         $diff->{'from_file'}[$diff->{'nparents'} - 1] = undef;
4795         for (my $i = 0; $i < $diff->{'nparents'}; $i++) {
4796                 if ($diff->{'status'}[$i] eq 'R' ||
4797                     $diff->{'status'}[$i] eq 'C') {
4798                         $diff->{'from_file'}[$i] =
4799                                 git_get_path_by_hash($parents[$i], $diff->{'from_id'}[$i]);
4800                 }
4801         }
4802
4803         return $diff;
4804 }
4805
4806 # is current raw difftree line of file deletion
4807 sub is_deleted {
4808         my $diffinfo = shift;
4809
4810         return $diffinfo->{'to_id'} eq ('0' x 40);
4811 }
4812
4813 # does patch correspond to [previous] difftree raw line
4814 # $diffinfo  - hashref of parsed raw diff format
4815 # $patchinfo - hashref of parsed patch diff format
4816 #              (the same keys as in $diffinfo)
4817 sub is_patch_split {
4818         my ($diffinfo, $patchinfo) = @_;
4819
4820         return defined $diffinfo && defined $patchinfo
4821                 && $diffinfo->{'to_file'} eq $patchinfo->{'to_file'};
4822 }
4823
4824
4825 sub git_difftree_body {
4826         my ($difftree, $hash, @parents) = @_;
4827         my ($parent) = $parents[0];
4828         my $have_blame = gitweb_check_feature('blame');
4829         print "<div class=\"list_head\">\n";
4830         if ($#{$difftree} > 10) {
4831                 print(($#{$difftree} + 1) . " files changed:\n");
4832         }
4833         print "</div>\n";
4834
4835         print "<table class=\"" .
4836               (@parents > 1 ? "combined " : "") .
4837               "diff_tree\">\n";
4838
4839         # header only for combined diff in 'commitdiff' view
4840         my $has_header = @$difftree && @parents > 1 && $action eq 'commitdiff';
4841         if ($has_header) {
4842                 # table header
4843                 print "<thead><tr>\n" .
4844                        "<th></th><th></th>\n"; # filename, patchN link
4845                 for (my $i = 0; $i < @parents; $i++) {
4846                         my $par = $parents[$i];
4847                         print "<th>" .
4848                               $cgi->a({-href => href(action=>"commitdiff",
4849                                                      hash=>$hash, hash_parent=>$par),
4850                                        -title => 'commitdiff to parent number ' .
4851                                                   ($i+1) . ': ' . substr($par,0,7)},
4852                                       $i+1) .
4853                               "&nbsp;</th>\n";
4854                 }
4855                 print "</tr></thead>\n<tbody>\n";
4856         }
4857
4858         my $alternate = 1;
4859         my $patchno = 0;
4860         foreach my $line (@{$difftree}) {
4861                 my $diff = parsed_difftree_line($line);
4862
4863                 if ($alternate) {
4864                         print "<tr class=\"dark\">\n";
4865                 } else {
4866                         print "<tr class=\"light\">\n";
4867                 }
4868                 $alternate ^= 1;
4869
4870                 if (exists $diff->{'nparents'}) { # combined diff
4871
4872                         fill_from_file_info($diff, @parents)
4873                                 unless exists $diff->{'from_file'};
4874
4875                         if (!is_deleted($diff)) {
4876                                 # file exists in the result (child) commit
4877                                 print "<td>" .
4878                                       $cgi->a({-href => href(action=>"blob", hash=>$diff->{'to_id'},
4879                                                              file_name=>$diff->{'to_file'},
4880                                                              hash_base=>$hash),
4881                                               -class => "list"}, esc_path($diff->{'to_file'})) .
4882                                       "</td>\n";
4883                         } else {
4884                                 print "<td>" .
4885                                       esc_path($diff->{'to_file'}) .
4886                                       "</td>\n";
4887                         }
4888
4889                         if ($action eq 'commitdiff') {
4890                                 # link to patch
4891                                 $patchno++;
4892                                 print "<td class=\"link\">" .
4893                                       $cgi->a({-href => href(-anchor=>"patch$patchno")},
4894                                               "patch") .
4895                                       " | " .
4896                                       "</td>\n";
4897                         }
4898
4899                         my $has_history = 0;
4900                         my $not_deleted = 0;
4901                         for (my $i = 0; $i < $diff->{'nparents'}; $i++) {
4902                                 my $hash_parent = $parents[$i];
4903                                 my $from_hash = $diff->{'from_id'}[$i];
4904                                 my $from_path = $diff->{'from_file'}[$i];
4905                                 my $status = $diff->{'status'}[$i];
4906
4907                                 $has_history ||= ($status ne 'A');
4908                                 $not_deleted ||= ($status ne 'D');
4909
4910                                 if ($status eq 'A') {
4911                                         print "<td  class=\"link\" align=\"right\"> | </td>\n";
4912                                 } elsif ($status eq 'D') {
4913                                         print "<td class=\"link\">" .
4914                                               $cgi->a({-href => href(action=>"blob",
4915                                                                      hash_base=>$hash,
4916                                                                      hash=>$from_hash,
4917                                                                      file_name=>$from_path)},
4918                                                       "blob" . ($i+1)) .
4919                                               " | </td>\n";
4920                                 } else {
4921                                         if ($diff->{'to_id'} eq $from_hash) {
4922                                                 print "<td class=\"link nochange\">";
4923                                         } else {
4924                                                 print "<td class=\"link\">";
4925                                         }
4926                                         print $cgi->a({-href => href(action=>"blobdiff",
4927                                                                      hash=>$diff->{'to_id'},
4928                                                                      hash_parent=>$from_hash,
4929                                                                      hash_base=>$hash,
4930                                                                      hash_parent_base=>$hash_parent,
4931                                                                      file_name=>$diff->{'to_file'},
4932                                                                      file_parent=>$from_path)},
4933                                                       "diff" . ($i+1)) .
4934                                               " | </td>\n";
4935                                 }
4936                         }
4937
4938                         print "<td class=\"link\">";
4939                         if ($not_deleted) {
4940                                 print $cgi->a({-href => href(action=>"blob",
4941                                                              hash=>$diff->{'to_id'},
4942                                                              file_name=>$diff->{'to_file'},
4943                                                              hash_base=>$hash)},
4944                                               "blob");
4945                                 print " | " if ($has_history);
4946                         }
4947                         if ($has_history) {
4948                                 print $cgi->a({-href => href(action=>"history",
4949                                                              file_name=>$diff->{'to_file'},
4950                                                              hash_base=>$hash)},
4951                                               "history");
4952                         }
4953                         print "</td>\n";
4954
4955                         print "</tr>\n";
4956                         next; # instead of 'else' clause, to avoid extra indent
4957                 }
4958                 # else ordinary diff
4959
4960                 my ($to_mode_oct, $to_mode_str, $to_file_type);
4961                 my ($from_mode_oct, $from_mode_str, $from_file_type);
4962                 if ($diff->{'to_mode'} ne ('0' x 6)) {
4963                         $to_mode_oct = oct $diff->{'to_mode'};
4964                         if (S_ISREG($to_mode_oct)) { # only for regular file
4965                                 $to_mode_str = sprintf("%04o", $to_mode_oct & 0777); # permission bits
4966                         }
4967                         $to_file_type = file_type($diff->{'to_mode'});
4968                 }
4969                 if ($diff->{'from_mode'} ne ('0' x 6)) {
4970                         $from_mode_oct = oct $diff->{'from_mode'};
4971                         if (S_ISREG($from_mode_oct)) { # only for regular file
4972                                 $from_mode_str = sprintf("%04o", $from_mode_oct & 0777); # permission bits
4973                         }
4974                         $from_file_type = file_type($diff->{'from_mode'});
4975                 }
4976
4977                 if ($diff->{'status'} eq "A") { # created
4978                         my $mode_chng = "<span class=\"file_status new\">[new $to_file_type";
4979                         $mode_chng   .= " with mode: $to_mode_str" if $to_mode_str;
4980                         $mode_chng   .= "]</span>";
4981                         print "<td>";
4982                         print $cgi->a({-href => href(action=>"blob", hash=>$diff->{'to_id'},
4983                                                      hash_base=>$hash, file_name=>$diff->{'file'}),
4984                                       -class => "list"}, esc_path($diff->{'file'}));
4985                         print "</td>\n";
4986                         print "<td>$mode_chng</td>\n";
4987                         print "<td class=\"link\">";
4988                         if ($action eq 'commitdiff') {
4989                                 # link to patch
4990                                 $patchno++;
4991                                 print $cgi->a({-href => href(-anchor=>"patch$patchno")},
4992                                               "patch") .
4993                                       " | ";
4994                         }
4995                         print $cgi->a({-href => href(action=>"blob", hash=>$diff->{'to_id'},
4996                                                      hash_base=>$hash, file_name=>$diff->{'file'})},
4997                                       "blob");
4998                         print "</td>\n";
4999
5000                 } elsif ($diff->{'status'} eq "D") { # deleted
5001                         my $mode_chng = "<span class=\"file_status deleted\">[deleted $from_file_type]</span>";
5002                         print "<td>";
5003                         print $cgi->a({-href => href(action=>"blob", hash=>$diff->{'from_id'},
5004                                                      hash_base=>$parent, file_name=>$diff->{'file'}),
5005                                        -class => "list"}, esc_path($diff->{'file'}));
5006                         print "</td>\n";
5007                         print "<td>$mode_chng</td>\n";
5008                         print "<td class=\"link\">";
5009                         if ($action eq 'commitdiff') {
5010                                 # link to patch
5011                                 $patchno++;
5012                                 print $cgi->a({-href => href(-anchor=>"patch$patchno")},
5013                                               "patch") .
5014                                       " | ";
5015                         }
5016                         print $cgi->a({-href => href(action=>"blob", hash=>$diff->{'from_id'},
5017                                                      hash_base=>$parent, file_name=>$diff->{'file'})},
5018                                       "blob") . " | ";
5019                         if ($have_blame) {
5020                                 print $cgi->a({-href => href(action=>"blame", hash_base=>$parent,
5021                                                              file_name=>$diff->{'file'})},
5022                                               "blame") . " | ";
5023                         }
5024                         print $cgi->a({-href => href(action=>"history", hash_base=>$parent,
5025                                                      file_name=>$diff->{'file'})},
5026                                       "history");
5027                         print "</td>\n";
5028
5029                 } elsif ($diff->{'status'} eq "M" || $diff->{'status'} eq "T") { # modified, or type changed
5030                         my $mode_chnge = "";
5031                         if ($diff->{'from_mode'} != $diff->{'to_mode'}) {
5032                                 $mode_chnge = "<span class=\"file_status mode_chnge\">[changed";
5033                                 if ($from_file_type ne $to_file_type) {
5034                                         $mode_chnge .= " from $from_file_type to $to_file_type";
5035                                 }
5036                                 if (($from_mode_oct & 0777) != ($to_mode_oct & 0777)) {
5037                                         if ($from_mode_str && $to_mode_str) {
5038                                                 $mode_chnge .= " mode: $from_mode_str->$to_mode_str";
5039                                         } elsif ($to_mode_str) {
5040                                                 $mode_chnge .= " mode: $to_mode_str";
5041                                         }
5042                                 }
5043                                 $mode_chnge .= "]</span>\n";
5044                         }
5045                         print "<td>";
5046                         print $cgi->a({-href => href(action=>"blob", hash=>$diff->{'to_id'},
5047                                                      hash_base=>$hash, file_name=>$diff->{'file'}),
5048                                       -class => "list"}, esc_path($diff->{'file'}));
5049                         print "</td>\n";
5050                         print "<td>$mode_chnge</td>\n";
5051                         print "<td class=\"link\">";
5052                         if ($action eq 'commitdiff') {
5053                                 # link to patch
5054                                 $patchno++;
5055                                 print $cgi->a({-href => href(-anchor=>"patch$patchno")},
5056                                               "patch") .
5057                                       " | ";
5058                         } elsif ($diff->{'to_id'} ne $diff->{'from_id'}) {
5059                                 # "commit" view and modified file (not onlu mode changed)
5060                                 print $cgi->a({-href => href(action=>"blobdiff",
5061                                                              hash=>$diff->{'to_id'}, hash_parent=>$diff->{'from_id'},
5062                                                              hash_base=>$hash, hash_parent_base=>$parent,
5063                                                              file_name=>$diff->{'file'})},
5064                                               "diff") .
5065                                       " | ";
5066                         }
5067                         print $cgi->a({-href => href(action=>"blob", hash=>$diff->{'to_id'},
5068                                                      hash_base=>$hash, file_name=>$diff->{'file'})},
5069                                        "blob") . " | ";
5070                         if ($have_blame) {
5071                                 print $cgi->a({-href => href(action=>"blame", hash_base=>$hash,
5072                                                              file_name=>$diff->{'file'})},
5073                                               "blame") . " | ";
5074                         }
5075                         print $cgi->a({-href => href(action=>"history", hash_base=>$hash,
5076                                                      file_name=>$diff->{'file'})},
5077                                       "history");
5078                         print "</td>\n";
5079
5080                 } elsif ($diff->{'status'} eq "R" || $diff->{'status'} eq "C") { # renamed or copied
5081                         my %status_name = ('R' => 'moved', 'C' => 'copied');
5082                         my $nstatus = $status_name{$diff->{'status'}};
5083                         my $mode_chng = "";
5084                         if ($diff->{'from_mode'} != $diff->{'to_mode'}) {
5085                                 # mode also for directories, so we cannot use $to_mode_str
5086                                 $mode_chng = sprintf(", mode: %04o", $to_mode_oct & 0777);
5087                         }
5088                         print "<td>" .
5089                               $cgi->a({-href => href(action=>"blob", hash_base=>$hash,
5090                                                      hash=>$diff->{'to_id'}, file_name=>$diff->{'to_file'}),
5091                                       -class => "list"}, esc_path($diff->{'to_file'})) . "</td>\n" .
5092                               "<td><span class=\"file_status $nstatus\">[$nstatus from " .
5093                               $cgi->a({-href => href(action=>"blob", hash_base=>$parent,
5094                                                      hash=>$diff->{'from_id'}, file_name=>$diff->{'from_file'}),
5095                                       -class => "list"}, esc_path($diff->{'from_file'})) .
5096                               " with " . (int $diff->{'similarity'}) . "% similarity$mode_chng]</span></td>\n" .
5097                               "<td class=\"link\">";
5098                         if ($action eq 'commitdiff') {
5099                                 # link to patch
5100                                 $patchno++;
5101                                 print $cgi->a({-href => href(-anchor=>"patch$patchno")},
5102                                               "patch") .
5103                                       " | ";
5104                         } elsif ($diff->{'to_id'} ne $diff->{'from_id'}) {
5105                                 # "commit" view and modified file (not only pure rename or copy)
5106                                 print $cgi->a({-href => href(action=>"blobdiff",
5107                                                              hash=>$diff->{'to_id'}, hash_parent=>$diff->{'from_id'},
5108                                                              hash_base=>$hash, hash_parent_base=>$parent,
5109                                                              file_name=>$diff->{'to_file'}, file_parent=>$diff->{'from_file'})},
5110                                               "diff") .
5111                                       " | ";
5112                         }
5113                         print $cgi->a({-href => href(action=>"blob", hash=>$diff->{'to_id'},
5114                                                      hash_base=>$parent, file_name=>$diff->{'to_file'})},
5115                                       "blob") . " | ";
5116                         if ($have_blame) {
5117                                 print $cgi->a({-href => href(action=>"blame", hash_base=>$hash,
5118                                                              file_name=>$diff->{'to_file'})},
5119                                               "blame") . " | ";
5120                         }
5121                         print $cgi->a({-href => href(action=>"history", hash_base=>$hash,
5122                                                     file_name=>$diff->{'to_file'})},
5123                                       "history");
5124                         print "</td>\n";
5125
5126                 } # we should not encounter Unmerged (U) or Unknown (X) status
5127                 print "</tr>\n";
5128         }
5129         print "</tbody>" if $has_header;
5130         print "</table>\n";
5131 }
5132
5133 # Print context lines and then rem/add lines in a side-by-side manner.
5134 sub print_sidebyside_diff_lines {
5135         my ($ctx, $rem, $add) = @_;
5136
5137         # print context block before add/rem block
5138         if (@$ctx) {
5139                 print join '',
5140                         '<div class="chunk_block ctx">',
5141                                 '<div class="old">',
5142                                 @$ctx,
5143                                 '</div>',
5144                                 '<div class="new">',
5145                                 @$ctx,
5146                                 '</div>',
5147                         '</div>';
5148         }
5149
5150         if (!@$add) {
5151                 # pure removal
5152                 print join '',
5153                         '<div class="chunk_block rem">',
5154                                 '<div class="old">',
5155                                 @$rem,
5156                                 '</div>',
5157                         '</div>';
5158         } elsif (!@$rem) {
5159                 # pure addition
5160                 print join '',
5161                         '<div class="chunk_block add">',
5162                                 '<div class="new">',
5163                                 @$add,
5164                                 '</div>',
5165                         '</div>';
5166         } else {
5167                 print join '',
5168                         '<div class="chunk_block chg">',
5169                                 '<div class="old">',
5170                                 @$rem,
5171                                 '</div>',
5172                                 '<div class="new">',
5173                                 @$add,
5174                                 '</div>',
5175                         '</div>';
5176         }
5177 }
5178
5179 # Print context lines and then rem/add lines in inline manner.
5180 sub print_inline_diff_lines {
5181         my ($ctx, $rem, $add) = @_;
5182
5183         print @$ctx, @$rem, @$add;
5184 }
5185
5186 # Format removed and added line, mark changed part and HTML-format them.
5187 # Implementation is based on contrib/diff-highlight
5188 sub format_rem_add_lines_pair {
5189         my ($rem, $add, $num_parents) = @_;
5190
5191         # We need to untabify lines before split()'ing them;
5192         # otherwise offsets would be invalid.
5193         chomp $rem;
5194         chomp $add;
5195         $rem = untabify($rem);
5196         $add = untabify($add);
5197
5198         my @rem = split(//, $rem);
5199         my @add = split(//, $add);
5200         my ($esc_rem, $esc_add);
5201         # Ignore leading +/- characters for each parent.
5202         my ($prefix_len, $suffix_len) = ($num_parents, 0);
5203         my ($prefix_has_nonspace, $suffix_has_nonspace);
5204
5205         my $shorter = (@rem < @add) ? @rem : @add;
5206         while ($prefix_len < $shorter) {
5207                 last if ($rem[$prefix_len] ne $add[$prefix_len]);
5208
5209                 $prefix_has_nonspace = 1 if ($rem[$prefix_len] !~ /\s/);
5210                 $prefix_len++;
5211         }
5212
5213         while ($prefix_len + $suffix_len < $shorter) {
5214                 last if ($rem[-1 - $suffix_len] ne $add[-1 - $suffix_len]);
5215
5216                 $suffix_has_nonspace = 1 if ($rem[-1 - $suffix_len] !~ /\s/);
5217                 $suffix_len++;
5218         }
5219
5220         # Mark lines that are different from each other, but have some common
5221         # part that isn't whitespace.  If lines are completely different, don't
5222         # mark them because that would make output unreadable, especially if
5223         # diff consists of multiple lines.
5224         if ($prefix_has_nonspace || $suffix_has_nonspace) {
5225                 $esc_rem = esc_html_hl_regions($rem, 'marked',
5226                         [$prefix_len, @rem - $suffix_len], -nbsp=>1);
5227                 $esc_add = esc_html_hl_regions($add, 'marked',
5228                         [$prefix_len, @add - $suffix_len], -nbsp=>1);
5229         } else {
5230                 $esc_rem = esc_html($rem, -nbsp=>1);
5231                 $esc_add = esc_html($add, -nbsp=>1);
5232         }
5233
5234         return format_diff_line(\$esc_rem, 'rem'),
5235                format_diff_line(\$esc_add, 'add');
5236 }
5237
5238 # HTML-format diff context, removed and added lines.
5239 sub format_ctx_rem_add_lines {
5240         my ($ctx, $rem, $add, $num_parents) = @_;
5241         my (@new_ctx, @new_rem, @new_add);
5242         my $can_highlight = 0;
5243         my $is_combined = ($num_parents > 1);
5244
5245         # Highlight if every removed line has a corresponding added line.
5246         if (@$add > 0 && @$add == @$rem) {
5247                 $can_highlight = 1;
5248
5249                 # Highlight lines in combined diff only if the chunk contains
5250                 # diff between the same version, e.g.
5251                 #
5252                 #    - a
5253                 #   -  b
5254                 #    + c
5255                 #   +  d
5256                 #
5257                 # Otherwise the highlightling would be confusing.
5258                 if ($is_combined) {
5259                         for (my $i = 0; $i < @$add; $i++) {
5260                                 my $prefix_rem = substr($rem->[$i], 0, $num_parents);
5261                                 my $prefix_add = substr($add->[$i], 0, $num_parents);
5262
5263                                 $prefix_rem =~ s/-/+/g;
5264
5265                                 if ($prefix_rem ne $prefix_add) {
5266                                         $can_highlight = 0;
5267                                         last;
5268                                 }
5269                         }
5270                 }
5271         }
5272
5273         if ($can_highlight) {
5274                 for (my $i = 0; $i < @$add; $i++) {
5275                         my ($line_rem, $line_add) = format_rem_add_lines_pair(
5276                                 $rem->[$i], $add->[$i], $num_parents);
5277                         push @new_rem, $line_rem;
5278                         push @new_add, $line_add;
5279                 }
5280         } else {
5281                 @new_rem = map { format_diff_line($_, 'rem') } @$rem;
5282                 @new_add = map { format_diff_line($_, 'add') } @$add;
5283         }
5284
5285         @new_ctx = map { format_diff_line($_, 'ctx') } @$ctx;
5286
5287         return (\@new_ctx, \@new_rem, \@new_add);
5288 }
5289
5290 # Print context lines and then rem/add lines.
5291 sub print_diff_lines {
5292         my ($ctx, $rem, $add, $diff_style, $num_parents) = @_;
5293         my $is_combined = $num_parents > 1;
5294
5295         ($ctx, $rem, $add) = format_ctx_rem_add_lines($ctx, $rem, $add,
5296                 $num_parents);
5297
5298         if ($diff_style eq 'sidebyside' && !$is_combined) {
5299                 print_sidebyside_diff_lines($ctx, $rem, $add);
5300         } else {
5301                 # default 'inline' style and unknown styles
5302                 print_inline_diff_lines($ctx, $rem, $add);
5303         }
5304 }
5305
5306 sub print_diff_chunk {
5307         my ($diff_style, $num_parents, $from, $to, @chunk) = @_;
5308         my (@ctx, @rem, @add);
5309
5310         # The class of the previous line.
5311         my $prev_class = '';
5312
5313         return unless @chunk;
5314
5315         # incomplete last line might be among removed or added lines,
5316         # or both, or among context lines: find which
5317         for (my $i = 1; $i < @chunk; $i++) {
5318                 if ($chunk[$i][0] eq 'incomplete') {
5319                         $chunk[$i][0] = $chunk[$i-1][0];
5320                 }
5321         }
5322
5323         # guardian
5324         push @chunk, ["", ""];
5325
5326         foreach my $line_info (@chunk) {
5327                 my ($class, $line) = @$line_info;
5328
5329                 # print chunk headers
5330                 if ($class && $class eq 'chunk_header') {
5331                         print format_diff_line($line, $class, $from, $to);
5332                         next;
5333                 }
5334
5335                 ## print from accumulator when have some add/rem lines or end
5336                 # of chunk (flush context lines), or when have add and rem
5337                 # lines and new block is reached (otherwise add/rem lines could
5338                 # be reordered)
5339                 if (!$class || ((@rem || @add) && $class eq 'ctx') ||
5340                     (@rem && @add && $class ne $prev_class)) {
5341                         print_diff_lines(\@ctx, \@rem, \@add,
5342                                          $diff_style, $num_parents);
5343                         @ctx = @rem = @add = ();
5344                 }
5345
5346                 ## adding lines to accumulator
5347                 # guardian value
5348                 last unless $line;
5349                 # rem, add or change
5350                 if ($class eq 'rem') {
5351                         push @rem, $line;
5352                 } elsif ($class eq 'add') {
5353                         push @add, $line;
5354                 }
5355                 # context line
5356                 if ($class eq 'ctx') {
5357                         push @ctx, $line;
5358                 }
5359
5360                 $prev_class = $class;
5361         }
5362 }
5363
5364 sub git_patchset_body {
5365         my ($fd, $diff_style, $difftree, $hash, @hash_parents) = @_;
5366         my ($hash_parent) = $hash_parents[0];
5367
5368         my $is_combined = (@hash_parents > 1);
5369         my $patch_idx = 0;
5370         my $patch_number = 0;
5371         my $patch_line;
5372         my $diffinfo;
5373         my $to_name;
5374         my (%from, %to);
5375         my @chunk; # for side-by-side diff
5376
5377         print "<div class=\"patchset\">\n";
5378
5379         # skip to first patch
5380         while ($patch_line = <$fd>) {
5381                 chomp $patch_line;
5382
5383                 last if ($patch_line =~ m/^diff /);
5384         }
5385
5386  PATCH:
5387         while ($patch_line) {
5388
5389                 # parse "git diff" header line
5390                 if ($patch_line =~ m/^diff --git (\"(?:[^\\\"]*(?:\\.[^\\\"]*)*)\"|[^ "]*) (.*)$/) {
5391                         # $1 is from_name, which we do not use
5392                         $to_name = unquote($2);
5393                         $to_name =~ s!^b/!!;
5394                 } elsif ($patch_line =~ m/^diff --(cc|combined) ("?.*"?)$/) {
5395                         # $1 is 'cc' or 'combined', which we do not use
5396                         $to_name = unquote($2);
5397                 } else {
5398                         $to_name = undef;
5399                 }
5400
5401                 # check if current patch belong to current raw line
5402                 # and parse raw git-diff line if needed
5403                 if (is_patch_split($diffinfo, { 'to_file' => $to_name })) {
5404                         # this is continuation of a split patch
5405                         print "<div class=\"patch cont\">\n";
5406                 } else {
5407                         # advance raw git-diff output if needed
5408                         $patch_idx++ if defined $diffinfo;
5409
5410                         # read and prepare patch information
5411                         $diffinfo = parsed_difftree_line($difftree->[$patch_idx]);
5412
5413                         # compact combined diff output can have some patches skipped
5414                         # find which patch (using pathname of result) we are at now;
5415                         if ($is_combined) {
5416                                 while ($to_name ne $diffinfo->{'to_file'}) {
5417                                         print "<div class=\"patch\" id=\"patch". ($patch_idx+1) ."\">\n" .
5418                                               format_diff_cc_simplified($diffinfo, @hash_parents) .
5419                                               "</div>\n";  # class="patch"
5420
5421                                         $patch_idx++;
5422                                         $patch_number++;
5423
5424                                         last if $patch_idx > $#$difftree;
5425                                         $diffinfo = parsed_difftree_line($difftree->[$patch_idx]);
5426                                 }
5427                         }
5428
5429                         # modifies %from, %to hashes
5430                         parse_from_to_diffinfo($diffinfo, \%from, \%to, @hash_parents);
5431
5432                         # this is first patch for raw difftree line with $patch_idx index
5433                         # we index @$difftree array from 0, but number patches from 1
5434                         print "<div class=\"patch\" id=\"patch". ($patch_idx+1) ."\">\n";
5435                 }
5436
5437                 # git diff header
5438                 #assert($patch_line =~ m/^diff /) if DEBUG;
5439                 #assert($patch_line !~ m!$/$!) if DEBUG; # is chomp-ed
5440                 $patch_number++;
5441                 # print "git diff" header
5442                 print format_git_diff_header_line($patch_line, $diffinfo,
5443                                                   \%from, \%to);
5444
5445                 # print extended diff header
5446                 print "<div class=\"diff extended_header\">\n";
5447         EXTENDED_HEADER:
5448                 while ($patch_line = <$fd>) {
5449                         chomp $patch_line;
5450
5451                         last EXTENDED_HEADER if ($patch_line =~ m/^--- |^diff /);
5452
5453                         print format_extended_diff_header_line($patch_line, $diffinfo,
5454                                                                \%from, \%to);
5455                 }
5456                 print "</div>\n"; # class="diff extended_header"
5457
5458                 # from-file/to-file diff header
5459                 if (! $patch_line) {
5460                         print "</div>\n"; # class="patch"
5461                         last PATCH;
5462                 }
5463                 next PATCH if ($patch_line =~ m/^diff /);
5464                 #assert($patch_line =~ m/^---/) if DEBUG;
5465
5466                 my $last_patch_line = $patch_line;
5467                 $patch_line = <$fd>;
5468                 chomp $patch_line;
5469                 #assert($patch_line =~ m/^\+\+\+/) if DEBUG;
5470
5471                 print format_diff_from_to_header($last_patch_line, $patch_line,
5472                                                  $diffinfo, \%from, \%to,
5473                                                  @hash_parents);
5474
5475                 # the patch itself
5476         LINE:
5477                 while ($patch_line = <$fd>) {
5478                         chomp $patch_line;
5479
5480                         next PATCH if ($patch_line =~ m/^diff /);
5481
5482                         my $class = diff_line_class($patch_line, \%from, \%to);
5483
5484                         if ($class eq 'chunk_header') {
5485                                 print_diff_chunk($diff_style, scalar @hash_parents, \%from, \%to, @chunk);
5486                                 @chunk = ();
5487                         }
5488
5489                         push @chunk, [ $class, $patch_line ];
5490                 }
5491
5492         } continue {
5493                 if (@chunk) {
5494                         print_diff_chunk($diff_style, scalar @hash_parents, \%from, \%to, @chunk);
5495                         @chunk = ();
5496                 }
5497                 print "</div>\n"; # class="patch"
5498         }
5499
5500         # for compact combined (--cc) format, with chunk and patch simplification
5501         # the patchset might be empty, but there might be unprocessed raw lines
5502         for (++$patch_idx if $patch_number > 0;
5503              $patch_idx < @$difftree;
5504              ++$patch_idx) {
5505                 # read and prepare patch information
5506                 $diffinfo = parsed_difftree_line($difftree->[$patch_idx]);
5507
5508                 # generate anchor for "patch" links in difftree / whatchanged part
5509                 print "<div class=\"patch\" id=\"patch". ($patch_idx+1) ."\">\n" .
5510                       format_diff_cc_simplified($diffinfo, @hash_parents) .
5511                       "</div>\n";  # class="patch"
5512
5513                 $patch_number++;
5514         }
5515
5516         if ($patch_number == 0) {
5517                 if (@hash_parents > 1) {
5518                         print "<div class=\"diff nodifferences\">Trivial merge</div>\n";
5519                 } else {
5520                         print "<div class=\"diff nodifferences\">No differences found</div>\n";
5521                 }
5522         }
5523
5524         print "</div>\n"; # class="patchset"
5525 }
5526
5527 # . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
5528
5529 sub git_project_search_form {
5530         my ($searchtext, $search_use_regexp) = @_;
5531
5532         my $limit = '';
5533         if ($project_filter) {
5534                 $limit = " in '$project_filter/'";
5535         }
5536
5537         print "<div class=\"projsearch\">\n";
5538         print $cgi->start_form(-method => 'get', -action => $my_uri) .
5539               $cgi->hidden(-name => 'a', -value => 'project_list')  . "\n";
5540         print $cgi->hidden(-name => 'pf', -value => $project_filter). "\n"
5541                 if (defined $project_filter);
5542         print $cgi->textfield(-name => 's', -value => $searchtext,
5543                               -title => "Search project by name and description$limit",
5544                               -size => 60) . "\n" .
5545               "<span title=\"Extended regular expression\">" .
5546               $cgi->checkbox(-name => 'sr', -value => 1, -label => 're',
5547                              -checked => $search_use_regexp) .
5548               "</span>\n" .
5549               $cgi->submit(-name => 'btnS', -value => 'Search') .
5550               $cgi->end_form() . "\n" .
5551               $cgi->a({-href => href(project => undef, searchtext => undef,
5552                                      project_filter => $project_filter)},
5553                       esc_html("List all projects$limit")) . "<br />\n";
5554         print "</div>\n";
5555 }
5556
5557 # entry for given @keys needs filling if at least one of keys in list
5558 # is not present in %$project_info
5559 sub project_info_needs_filling {
5560         my ($project_info, @keys) = @_;
5561
5562         # return List::MoreUtils::any { !exists $project_info->{$_} } @keys;
5563         foreach my $key (@keys) {
5564                 if (!exists $project_info->{$key}) {
5565                         return 1;
5566                 }
5567         }
5568         return;
5569 }
5570
5571 # fills project list info (age, description, owner, category, forks, etc.)
5572 # for each project in the list, removing invalid projects from
5573 # returned list, or fill only specified info.
5574 #
5575 # Invalid projects are removed from the returned list if and only if you
5576 # ask 'age' or 'age_string' to be filled, because they are the only fields
5577 # that run unconditionally git command that requires repository, and
5578 # therefore do always check if project repository is invalid.
5579 #
5580 # USAGE:
5581 # * fill_project_list_info(\@project_list, 'descr_long', 'ctags')
5582 #   ensures that 'descr_long' and 'ctags' fields are filled
5583 # * @project_list = fill_project_list_info(\@project_list)
5584 #   ensures that all fields are filled (and invalid projects removed)
5585 #
5586 # NOTE: modifies $projlist, but does not remove entries from it
5587 sub fill_project_list_info {
5588         my ($projlist, @wanted_keys) = @_;
5589         my @projects;
5590         my $filter_set = sub { return @_; };
5591         if (@wanted_keys) {
5592                 my %wanted_keys = map { $_ => 1 } @wanted_keys;
5593                 $filter_set = sub { return grep { $wanted_keys{$_} } @_; };
5594         }
5595
5596         my $show_ctags = gitweb_check_feature('ctags');
5597  PROJECT:
5598         foreach my $pr (@$projlist) {
5599                 if (project_info_needs_filling($pr, $filter_set->('age', 'age_string'))) {
5600                         my (@activity) = git_get_last_activity($pr->{'path'});
5601                         unless (@activity) {
5602                                 next PROJECT;
5603                         }
5604                         ($pr->{'age'}, $pr->{'age_string'}) = @activity;
5605                 }
5606                 if (project_info_needs_filling($pr, $filter_set->('descr', 'descr_long'))) {
5607                         my $descr = git_get_project_description($pr->{'path'}) || "";
5608                         $descr = to_utf8($descr);
5609                         $pr->{'descr_long'} = $descr;
5610                         $pr->{'descr'} = chop_str($descr, $projects_list_description_width, 5);
5611                 }
5612                 if (project_info_needs_filling($pr, $filter_set->('owner'))) {
5613                         $pr->{'owner'} = git_get_project_owner("$pr->{'path'}") || "";
5614                 }
5615                 if ($show_ctags &&
5616                     project_info_needs_filling($pr, $filter_set->('ctags'))) {
5617                         $pr->{'ctags'} = git_get_project_ctags($pr->{'path'});
5618                 }
5619                 if ($projects_list_group_categories &&
5620                     project_info_needs_filling($pr, $filter_set->('category'))) {
5621                         my $cat = git_get_project_category($pr->{'path'}) ||
5622                                                            $project_list_default_category;
5623                         $pr->{'category'} = to_utf8($cat);
5624                 }
5625
5626                 push @projects, $pr;
5627         }
5628
5629         return @projects;
5630 }
5631
5632 sub sort_projects_list {
5633         my ($projlist, $order) = @_;
5634
5635         sub order_str {
5636                 my $key = shift;
5637                 return sub { $a->{$key} cmp $b->{$key} };
5638         }
5639
5640         sub order_num_then_undef {
5641                 my $key = shift;
5642                 return sub {
5643                         defined $a->{$key} ?
5644                                 (defined $b->{$key} ? $a->{$key} <=> $b->{$key} : -1) :
5645                                 (defined $b->{$key} ? 1 : 0)
5646                 };
5647         }
5648
5649         my %orderings = (
5650                 project => order_str('path'),
5651                 descr => order_str('descr_long'),
5652                 owner => order_str('owner'),
5653                 age => order_num_then_undef('age'),
5654         );
5655
5656         my $ordering = $orderings{$order};
5657         return defined $ordering ? sort $ordering @$projlist : @$projlist;
5658 }
5659
5660 # returns a hash of categories, containing the list of project
5661 # belonging to each category
5662 sub build_projlist_by_category {
5663         my ($projlist, $from, $to) = @_;
5664         my %categories;
5665
5666         $from = 0 unless defined $from;
5667         $to = $#$projlist if (!defined $to || $#$projlist < $to);
5668
5669         for (my $i = $from; $i <= $to; $i++) {
5670                 my $pr = $projlist->[$i];
5671                 push @{$categories{ $pr->{'category'} }}, $pr;
5672         }
5673
5674         return wantarray ? %categories : \%categories;
5675 }
5676
5677 # print 'sort by' <th> element, generating 'sort by $name' replay link
5678 # if that order is not selected
5679 sub print_sort_th {
5680         print format_sort_th(@_);
5681 }
5682
5683 sub format_sort_th {
5684         my ($name, $order, $header) = @_;
5685         my $sort_th = "";
5686         $header ||= ucfirst($name);
5687
5688         if ($order eq $name) {
5689                 $sort_th .= "<th>$header</th>\n";
5690         } else {
5691                 $sort_th .= "<th>" .
5692                             $cgi->a({-href => href(-replay=>1, order=>$name),
5693                                      -class => "header"}, $header) .
5694                             "</th>\n";
5695         }
5696
5697         return $sort_th;
5698 }
5699
5700 sub git_project_list_rows {
5701         my ($projlist, $from, $to, $check_forks) = @_;
5702
5703         $from = 0 unless defined $from;
5704         $to = $#$projlist if (!defined $to || $#$projlist < $to);
5705
5706         my $alternate = 1;
5707         for (my $i = $from; $i <= $to; $i++) {
5708                 my $pr = $projlist->[$i];
5709
5710                 if ($alternate) {
5711                         print "<tr class=\"dark\">\n";
5712                 } else {
5713                         print "<tr class=\"light\">\n";
5714                 }
5715                 $alternate ^= 1;
5716
5717                 if ($check_forks) {
5718                         print "<td>";
5719                         if ($pr->{'forks'}) {
5720                                 my $nforks = scalar @{$pr->{'forks'}};
5721                                 if ($nforks > 0) {
5722                                         print $cgi->a({-href => href(project=>$pr->{'path'}, action=>"forks"),
5723                                                        -title => "$nforks forks"}, "+");
5724                                 } else {
5725                                         print $cgi->span({-title => "$nforks forks"}, "+");
5726                                 }
5727                         }
5728                         print "</td>\n";
5729                 }
5730                 print "<td>" . $cgi->a({-href => href(project=>$pr->{'path'}, action=>"summary"),
5731                                         -class => "list"},
5732                                        esc_html_match_hl($pr->{'path'}, $search_regexp)) .
5733                       "</td>\n" .
5734                       "<td>" . $cgi->a({-href => href(project=>$pr->{'path'}, action=>"summary"),
5735                                         -class => "list",
5736                                         -title => $pr->{'descr_long'}},
5737                                         $search_regexp
5738                                         ? esc_html_match_hl_chopped($pr->{'descr_long'},
5739                                                                     $pr->{'descr'}, $search_regexp)
5740                                         : esc_html($pr->{'descr'})) .
5741                       "</td>\n";
5742                 unless ($omit_owner) {
5743                         print "<td><i>" . chop_and_escape_str($pr->{'owner'}, 15) . "</i></td>\n";
5744                 }
5745                 unless ($omit_age_column) {
5746                         print "<td class=\"". age_class($pr->{'age'}) . "\">" .
5747                             (defined $pr->{'age_string'} ? $pr->{'age_string'} : "No commits") . "</td>\n";
5748                 }
5749                 print"<td class=\"link\">" .
5750                       $cgi->a({-href => href(project=>$pr->{'path'}, action=>"summary")}, "summary")   . " | " .
5751                       $cgi->a({-href => href(project=>$pr->{'path'}, action=>"shortlog")}, "shortlog") . " | " .
5752                       $cgi->a({-href => href(project=>$pr->{'path'}, action=>"log")}, "log") . " | " .
5753                       $cgi->a({-href => href(project=>$pr->{'path'}, action=>"tree")}, "tree") .
5754                       ($pr->{'forks'} ? " | " . $cgi->a({-href => href(project=>$pr->{'path'}, action=>"forks")}, "forks") : '') .
5755                       "</td>\n" .
5756                       "</tr>\n";
5757         }
5758 }
5759
5760 sub git_project_list_body {
5761         # actually uses global variable $project
5762         my ($projlist, $order, $from, $to, $extra, $no_header) = @_;
5763         my @projects = @$projlist;
5764
5765         my $check_forks = gitweb_check_feature('forks');
5766         my $show_ctags  = gitweb_check_feature('ctags');
5767         my $tagfilter = $show_ctags ? $input_params{'ctag'} : undef;
5768         $check_forks = undef
5769                 if ($tagfilter || $search_regexp);
5770
5771         # filtering out forks before filling info allows to do less work
5772         @projects = filter_forks_from_projects_list(\@projects)
5773                 if ($check_forks);
5774         # search_projects_list pre-fills required info
5775         @projects = search_projects_list(\@projects,
5776                                          'search_regexp' => $search_regexp,
5777                                          'tagfilter'  => $tagfilter)
5778                 if ($tagfilter || $search_regexp);
5779         # fill the rest
5780         my @all_fields = ('descr', 'descr_long', 'ctags', 'category');
5781         push @all_fields, ('age', 'age_string') unless($omit_age_column);
5782         push @all_fields, 'owner' unless($omit_owner);
5783         @projects = fill_project_list_info(\@projects, @all_fields);
5784
5785         $order ||= $default_projects_order;
5786         $from = 0 unless defined $from;
5787         $to = $#projects if (!defined $to || $#projects < $to);
5788
5789         # short circuit
5790         if ($from > $to) {
5791                 print "<center>\n".
5792                       "<b>No such projects found</b><br />\n".
5793                       "Click ".$cgi->a({-href=>href(project=>undef)},"here")." to view all projects<br />\n".
5794                       "</center>\n<br />\n";
5795                 return;
5796         }
5797
5798         @projects = sort_projects_list(\@projects, $order);
5799
5800         if ($show_ctags) {
5801                 my $ctags = git_gather_all_ctags(\@projects);
5802                 my $cloud = git_populate_project_tagcloud($ctags);
5803                 print git_show_project_tagcloud($cloud, 64);
5804         }
5805
5806         print "<table class=\"project_list\">\n";
5807         unless ($no_header) {
5808                 print "<tr>\n";
5809                 if ($check_forks) {
5810                         print "<th></th>\n";
5811                 }
5812                 print_sort_th('project', $order, 'Project');
5813                 print_sort_th('descr', $order, 'Description');
5814                 print_sort_th('owner', $order, 'Owner') unless $omit_owner;
5815                 print_sort_th('age', $order, 'Last Change') unless $omit_age_column;
5816                 print "<th></th>\n" . # for links
5817                       "</tr>\n";
5818         }
5819
5820         if ($projects_list_group_categories) {
5821                 # only display categories with projects in the $from-$to window
5822                 @projects = sort {$a->{'category'} cmp $b->{'category'}} @projects[$from..$to];
5823                 my %categories = build_projlist_by_category(\@projects, $from, $to);
5824                 foreach my $cat (sort keys %categories) {
5825                         unless ($cat eq "") {
5826                                 print "<tr>\n";
5827                                 if ($check_forks) {
5828                                         print "<td></td>\n";
5829                                 }
5830                                 print "<td class=\"category\" colspan=\"5\">".esc_html($cat)."</td>\n";
5831                                 print "</tr>\n";
5832                         }
5833
5834                         git_project_list_rows($categories{$cat}, undef, undef, $check_forks);
5835                 }
5836         } else {
5837                 git_project_list_rows(\@projects, $from, $to, $check_forks);
5838         }
5839
5840         if (defined $extra) {
5841                 print "<tr>\n";
5842                 if ($check_forks) {
5843                         print "<td></td>\n";
5844                 }
5845                 print "<td colspan=\"5\">$extra</td>\n" .
5846                       "</tr>\n";
5847         }
5848         print "</table>\n";
5849 }
5850
5851 sub git_log_body {
5852         # uses global variable $project
5853         my ($commitlist, $from, $to, $refs, $extra) = @_;
5854
5855         $from = 0 unless defined $from;
5856         $to = $#{$commitlist} if (!defined $to || $#{$commitlist} < $to);
5857
5858         for (my $i = 0; $i <= $to; $i++) {
5859                 my %co = %{$commitlist->[$i]};
5860                 next if !%co;
5861                 my $commit = $co{'id'};
5862                 my $ref = format_ref_marker($refs, $commit);
5863                 git_print_header_div('commit',
5864                                "<span class=\"age\">$co{'age_string'}</span>" .
5865                                esc_html($co{'title'}) . $ref,
5866                                $commit);
5867                 print "<div class=\"title_text\">\n" .
5868                       "<div class=\"log_link\">\n" .
5869                       $cgi->a({-href => href(action=>"commit", hash=>$commit)}, "commit") .
5870                       " | " .
5871                       $cgi->a({-href => href(action=>"commitdiff", hash=>$commit)}, "commitdiff") .
5872                       " | " .
5873                       $cgi->a({-href => href(action=>"tree", hash=>$commit, hash_base=>$commit)}, "tree") .
5874                       "<br/>\n" .
5875                       "</div>\n";
5876                       git_print_authorship(\%co, -tag => 'span');
5877                       print "<br/>\n</div>\n";
5878
5879                 print "<div class=\"log_body\">\n";
5880                 git_print_log($co{'comment'}, -final_empty_line=> 1);
5881                 print "</div>\n";
5882         }
5883         if ($extra) {
5884                 print "<div class=\"page_nav\">\n";
5885                 print "$extra\n";
5886                 print "</div>\n";
5887         }
5888 }
5889
5890 sub git_shortlog_body {
5891         # uses global variable $project
5892         my ($commitlist, $from, $to, $refs, $extra) = @_;
5893
5894         $from = 0 unless defined $from;
5895         $to = $#{$commitlist} if (!defined $to || $#{$commitlist} < $to);
5896
5897         print "<table class=\"shortlog\">\n";
5898         my $alternate = 1;
5899         for (my $i = $from; $i <= $to; $i++) {
5900                 my %co = %{$commitlist->[$i]};
5901                 my $commit = $co{'id'};
5902                 my $ref = format_ref_marker($refs, $commit);
5903                 if ($alternate) {
5904                         print "<tr class=\"dark\">\n";
5905                 } else {
5906                         print "<tr class=\"light\">\n";
5907                 }
5908                 $alternate ^= 1;
5909                 # git_summary() used print "<td><i>$co{'age_string'}</i></td>\n" .
5910                 print "<td title=\"$co{'age_string_age'}\"><i>$co{'age_string_date'}</i></td>\n" .
5911                       format_author_html('td', \%co, 10) . "<td>";
5912                 print format_subject_html($co{'title'}, $co{'title_short'},
5913                                           href(action=>"commit", hash=>$commit), $ref);
5914                 print "</td>\n" .
5915                       "<td class=\"link\">" .
5916                       $cgi->a({-href => href(action=>"commit", hash=>$commit)}, "commit") . " | " .
5917                       $cgi->a({-href => href(action=>"commitdiff", hash=>$commit)}, "commitdiff") . " | " .
5918                       $cgi->a({-href => href(action=>"tree", hash=>$commit, hash_base=>$commit)}, "tree");
5919                 my $snapshot_links = format_snapshot_links($commit);
5920                 if (defined $snapshot_links) {
5921                         print " | " . $snapshot_links;
5922                 }
5923                 print "</td>\n" .
5924                       "</tr>\n";
5925         }
5926         if (defined $extra) {
5927                 print "<tr>\n" .
5928                       "<td colspan=\"4\">$extra</td>\n" .
5929                       "</tr>\n";
5930         }
5931         print "</table>\n";
5932 }
5933
5934 sub git_history_body {
5935         # Warning: assumes constant type (blob or tree) during history
5936         my ($commitlist, $from, $to, $refs, $extra,
5937             $file_name, $file_hash, $ftype) = @_;
5938
5939         $from = 0 unless defined $from;
5940         $to = $#{$commitlist} unless (defined $to && $to <= $#{$commitlist});
5941
5942         print "<table class=\"history\">\n";
5943         my $alternate = 1;
5944         for (my $i = $from; $i <= $to; $i++) {
5945                 my %co = %{$commitlist->[$i]};
5946                 if (!%co) {
5947                         next;
5948                 }
5949                 my $commit = $co{'id'};
5950
5951                 my $ref = format_ref_marker($refs, $commit);
5952
5953                 if ($alternate) {
5954                         print "<tr class=\"dark\">\n";
5955                 } else {
5956                         print "<tr class=\"light\">\n";
5957                 }
5958                 $alternate ^= 1;
5959                 print "<td title=\"$co{'age_string_age'}\"><i>$co{'age_string_date'}</i></td>\n" .
5960         # shortlog:   format_author_html('td', \%co, 10)
5961                       format_author_html('td', \%co, 15, 3) . "<td>";
5962                 # originally git_history used chop_str($co{'title'}, 50)
5963                 print format_subject_html($co{'title'}, $co{'title_short'},
5964                                           href(action=>"commit", hash=>$commit), $ref);
5965                 print "</td>\n" .
5966                       "<td class=\"link\">" .
5967                       $cgi->a({-href => href(action=>$ftype, hash_base=>$commit, file_name=>$file_name)}, $ftype) . " | " .
5968                       $cgi->a({-href => href(action=>"commitdiff", hash=>$commit)}, "commitdiff");
5969
5970                 if ($ftype eq 'blob') {
5971                         print " | " .
5972                               $cgi->a({-href => href(action=>"blob_plain", hash_base=>$commit, file_name=>$file_name)}, "raw");
5973
5974                         my $blob_current = $file_hash;
5975                         my $blob_parent  = git_get_hash_by_path($commit, $file_name);
5976                         if (defined $blob_current && defined $blob_parent &&
5977                                         $blob_current ne $blob_parent) {
5978                                 print " | " .
5979                                         $cgi->a({-href => href(action=>"blobdiff",
5980                                                                hash=>$blob_current, hash_parent=>$blob_parent,
5981                                                                hash_base=>$hash_base, hash_parent_base=>$commit,
5982                                                                file_name=>$file_name)},
5983                                                 "diff to current");
5984                         }
5985                 }
5986                 print "</td>\n" .
5987                       "</tr>\n";
5988         }
5989         if (defined $extra) {
5990                 print "<tr>\n" .
5991                       "<td colspan=\"4\">$extra</td>\n" .
5992                       "</tr>\n";
5993         }
5994         print "</table>\n";
5995 }
5996
5997 sub git_tags_body {
5998         # uses global variable $project
5999         my ($taglist, $from, $to, $extra) = @_;
6000         $from = 0 unless defined $from;
6001         $to = $#{$taglist} if (!defined $to || $#{$taglist} < $to);
6002
6003         print "<table class=\"tags\">\n";
6004         my $alternate = 1;
6005         for (my $i = $from; $i <= $to; $i++) {
6006                 my $entry = $taglist->[$i];
6007                 my %tag = %$entry;
6008                 my $comment = $tag{'subject'};
6009                 my $comment_short;
6010                 if (defined $comment) {
6011                         $comment_short = chop_str($comment, 30, 5);
6012                 }
6013                 if ($alternate) {
6014                         print "<tr class=\"dark\">\n";
6015                 } else {
6016                         print "<tr class=\"light\">\n";
6017                 }
6018                 $alternate ^= 1;
6019                 if (defined $tag{'age'}) {
6020                         print "<td><i>$tag{'age'}</i></td>\n";
6021                 } else {
6022                         print "<td></td>\n";
6023                 }
6024                 print "<td>" .
6025                       $cgi->a({-href => href(action=>$tag{'reftype'}, hash=>$tag{'refid'}),
6026                                -class => "list name"}, esc_html($tag{'name'})) .
6027                       "</td>\n" .
6028                       "<td>";
6029                 if (defined $comment) {
6030                         print format_subject_html($comment, $comment_short,
6031                                                   href(action=>"tag", hash=>$tag{'id'}));
6032                 }
6033                 print "</td>\n" .
6034                       "<td class=\"selflink\">";
6035                 if ($tag{'type'} eq "tag") {
6036                         print $cgi->a({-href => href(action=>"tag", hash=>$tag{'id'})}, "tag");
6037                 } else {
6038                         print "&nbsp;";
6039                 }
6040                 print "</td>\n" .
6041                       "<td class=\"link\">" . " | " .
6042                       $cgi->a({-href => href(action=>$tag{'reftype'}, hash=>$tag{'refid'})}, $tag{'reftype'});
6043                 if ($tag{'reftype'} eq "commit") {
6044                         print " | " . $cgi->a({-href => href(action=>"shortlog", hash=>$tag{'fullname'})}, "shortlog") .
6045                               " | " . $cgi->a({-href => href(action=>"log", hash=>$tag{'fullname'})}, "log");
6046                 } elsif ($tag{'reftype'} eq "blob") {
6047                         print " | " . $cgi->a({-href => href(action=>"blob_plain", hash=>$tag{'refid'})}, "raw");
6048                 }
6049                 print "</td>\n" .
6050                       "</tr>";
6051         }
6052         if (defined $extra) {
6053                 print "<tr>\n" .
6054                       "<td colspan=\"5\">$extra</td>\n" .
6055                       "</tr>\n";
6056         }
6057         print "</table>\n";
6058 }
6059
6060 sub git_heads_body {
6061         # uses global variable $project
6062         my ($headlist, $head_at, $from, $to, $extra) = @_;
6063         $from = 0 unless defined $from;
6064         $to = $#{$headlist} if (!defined $to || $#{$headlist} < $to);
6065
6066         print "<table class=\"heads\">\n";
6067         my $alternate = 1;
6068         for (my $i = $from; $i <= $to; $i++) {
6069                 my $entry = $headlist->[$i];
6070                 my %ref = %$entry;
6071                 my $curr = defined $head_at && $ref{'id'} eq $head_at;
6072                 if ($alternate) {
6073                         print "<tr class=\"dark\">\n";
6074                 } else {
6075                         print "<tr class=\"light\">\n";
6076                 }
6077                 $alternate ^= 1;
6078                 print "<td><i>$ref{'age'}</i></td>\n" .
6079                       ($curr ? "<td class=\"current_head\">" : "<td>") .
6080                       $cgi->a({-href => href(action=>"shortlog", hash=>$ref{'fullname'}),
6081                                -class => "list name"},esc_html($ref{'name'})) .
6082                       "</td>\n" .
6083                       "<td class=\"link\">" .
6084                       $cgi->a({-href => href(action=>"shortlog", hash=>$ref{'fullname'})}, "shortlog") . " | " .
6085                       $cgi->a({-href => href(action=>"log", hash=>$ref{'fullname'})}, "log") . " | " .
6086                       $cgi->a({-href => href(action=>"tree", hash=>$ref{'fullname'}, hash_base=>$ref{'fullname'})}, "tree") .
6087                       "</td>\n" .
6088                       "</tr>";
6089         }
6090         if (defined $extra) {
6091                 print "<tr>\n" .
6092                       "<td colspan=\"3\">$extra</td>\n" .
6093                       "</tr>\n";
6094         }
6095         print "</table>\n";
6096 }
6097
6098 # Display a single remote block
6099 sub git_remote_block {
6100         my ($remote, $rdata, $limit, $head) = @_;
6101
6102         my $heads = $rdata->{'heads'};
6103         my $fetch = $rdata->{'fetch'};
6104         my $push = $rdata->{'push'};
6105
6106         my $urls_table = "<table class=\"projects_list\">\n" ;
6107
6108         if (defined $fetch) {
6109                 if ($fetch eq $push) {
6110                         $urls_table .= format_repo_url("URL", $fetch);
6111                 } else {
6112                         $urls_table .= format_repo_url("Fetch URL", $fetch);
6113                         $urls_table .= format_repo_url("Push URL", $push) if defined $push;
6114                 }
6115         } elsif (defined $push) {
6116                 $urls_table .= format_repo_url("Push URL", $push);
6117         } else {
6118                 $urls_table .= format_repo_url("", "No remote URL");
6119         }
6120
6121         $urls_table .= "</table>\n";
6122
6123         my $dots;
6124         if (defined $limit && $limit < @$heads) {
6125                 $dots = $cgi->a({-href => href(action=>"remotes", hash=>$remote)}, "...");
6126         }
6127
6128         print $urls_table;
6129         git_heads_body($heads, $head, 0, $limit, $dots);
6130 }
6131
6132 # Display a list of remote names with the respective fetch and push URLs
6133 sub git_remotes_list {
6134         my ($remotedata, $limit) = @_;
6135         print "<table class=\"heads\">\n";
6136         my $alternate = 1;
6137         my @remotes = sort keys %$remotedata;
6138
6139         my $limited = $limit && $limit < @remotes;
6140
6141         $#remotes = $limit - 1 if $limited;
6142
6143         while (my $remote = shift @remotes) {
6144                 my $rdata = $remotedata->{$remote};
6145                 my $fetch = $rdata->{'fetch'};
6146                 my $push = $rdata->{'push'};
6147                 if ($alternate) {
6148                         print "<tr class=\"dark\">\n";
6149                 } else {
6150                         print "<tr class=\"light\">\n";
6151                 }
6152                 $alternate ^= 1;
6153                 print "<td>" .
6154                       $cgi->a({-href=> href(action=>'remotes', hash=>$remote),
6155                                -class=> "list name"},esc_html($remote)) .
6156                       "</td>";
6157                 print "<td class=\"link\">" .
6158                       (defined $fetch ? $cgi->a({-href=> $fetch}, "fetch") : "fetch") .
6159                       " | " .
6160                       (defined $push ? $cgi->a({-href=> $push}, "push") : "push") .
6161                       "</td>";
6162
6163                 print "</tr>\n";
6164         }
6165
6166         if ($limited) {
6167                 print "<tr>\n" .
6168                       "<td colspan=\"3\">" .
6169                       $cgi->a({-href => href(action=>"remotes")}, "...") .
6170                       "</td>\n" . "</tr>\n";
6171         }
6172
6173         print "</table>";
6174 }
6175
6176 # Display remote heads grouped by remote, unless there are too many
6177 # remotes, in which case we only display the remote names
6178 sub git_remotes_body {
6179         my ($remotedata, $limit, $head) = @_;
6180         if ($limit and $limit < keys %$remotedata) {
6181                 git_remotes_list($remotedata, $limit);
6182         } else {
6183                 fill_remote_heads($remotedata);
6184                 while (my ($remote, $rdata) = each %$remotedata) {
6185                         git_print_section({-class=>"remote", -id=>$remote},
6186                                 ["remotes", $remote, $remote], sub {
6187                                         git_remote_block($remote, $rdata, $limit, $head);
6188                                 });
6189                 }
6190         }
6191 }
6192
6193 sub git_search_message {
6194         my %co = @_;
6195
6196         my $greptype;
6197         if ($searchtype eq 'commit') {
6198                 $greptype = "--grep=";
6199         } elsif ($searchtype eq 'author') {
6200                 $greptype = "--author=";
6201         } elsif ($searchtype eq 'committer') {
6202                 $greptype = "--committer=";
6203         }
6204         $greptype .= $searchtext;
6205         my @commitlist = parse_commits($hash, 101, (100 * $page), undef,
6206                                        $greptype, '--regexp-ignore-case',
6207                                        $search_use_regexp ? '--extended-regexp' : '--fixed-strings');
6208
6209         my $paging_nav = '';
6210         if ($page > 0) {
6211                 $paging_nav .=
6212                         $cgi->a({-href => href(-replay=>1, page=>undef)},
6213                                 "first") .
6214                         " &sdot; " .
6215                         $cgi->a({-href => href(-replay=>1, page=>$page-1),
6216                                  -accesskey => "p", -title => "Alt-p"}, "prev");
6217         } else {
6218                 $paging_nav .= "first &sdot; prev";
6219         }
6220         my $next_link = '';
6221         if ($#commitlist >= 100) {
6222                 $next_link =
6223                         $cgi->a({-href => href(-replay=>1, page=>$page+1),
6224                                  -accesskey => "n", -title => "Alt-n"}, "next");
6225                 $paging_nav .= " &sdot; $next_link";
6226         } else {
6227                 $paging_nav .= " &sdot; next";
6228         }
6229
6230         git_header_html();
6231
6232         git_print_page_nav('','', $hash,$co{'tree'},$hash, $paging_nav);
6233         git_print_header_div('commit', esc_html($co{'title'}), $hash);
6234         if ($page == 0 && !@commitlist) {
6235                 print "<p>No match.</p>\n";
6236         } else {
6237                 git_search_grep_body(\@commitlist, 0, 99, $next_link);
6238         }
6239
6240         git_footer_html();
6241 }
6242
6243 sub git_search_changes {
6244         my %co = @_;
6245
6246         local $/ = "\n";
6247         open my $fd, '-|', git_cmd(), '--no-pager', 'log', @diff_opts,
6248                 '--pretty=format:%H', '--no-abbrev', '--raw', "-S$searchtext",
6249                 ($search_use_regexp ? '--pickaxe-regex' : ())
6250                         or die_error(500, "Open git-log failed");
6251
6252         git_header_html();
6253
6254         git_print_page_nav('','', $hash,$co{'tree'},$hash);
6255         git_print_header_div('commit', esc_html($co{'title'}), $hash);
6256
6257         print "<table class=\"pickaxe search\">\n";
6258         my $alternate = 1;
6259         undef %co;
6260         my @files;
6261         while (my $line = <$fd>) {
6262                 chomp $line;
6263                 next unless $line;
6264
6265                 my %set = parse_difftree_raw_line($line);
6266                 if (defined $set{'commit'}) {
6267                         # finish previous commit
6268                         if (%co) {
6269                                 print "</td>\n" .
6270                                       "<td class=\"link\">" .
6271                                       $cgi->a({-href => href(action=>"commit", hash=>$co{'id'})},
6272                                               "commit") .
6273                                       " | " .
6274                                       $cgi->a({-href => href(action=>"tree", hash=>$co{'tree'},
6275                                                              hash_base=>$co{'id'})},
6276                                               "tree") .
6277                                       "</td>\n" .
6278                                       "</tr>\n";
6279                         }
6280
6281                         if ($alternate) {
6282                                 print "<tr class=\"dark\">\n";
6283                         } else {
6284                                 print "<tr class=\"light\">\n";
6285                         }
6286                         $alternate ^= 1;
6287                         %co = parse_commit($set{'commit'});
6288                         my $author = chop_and_escape_str($co{'author_name'}, 15, 5);
6289                         print "<td title=\"$co{'age_string_age'}\"><i>$co{'age_string_date'}</i></td>\n" .
6290                               "<td><i>$author</i></td>\n" .
6291                               "<td>" .
6292                               $cgi->a({-href => href(action=>"commit", hash=>$co{'id'}),
6293                                       -class => "list subject"},
6294                                       chop_and_escape_str($co{'title'}, 50) . "<br/>");
6295                 } elsif (defined $set{'to_id'}) {
6296                         next if ($set{'to_id'} =~ m/^0{40}$/);
6297
6298                         print $cgi->a({-href => href(action=>"blob", hash_base=>$co{'id'},
6299                                                      hash=>$set{'to_id'}, file_name=>$set{'to_file'}),
6300                                       -class => "list"},
6301                                       "<span class=\"match\">" . esc_path($set{'file'}) . "</span>") .
6302                               "<br/>\n";
6303                 }
6304         }
6305         close $fd;
6306
6307         # finish last commit (warning: repetition!)
6308         if (%co) {
6309                 print "</td>\n" .
6310                       "<td class=\"link\">" .
6311                       $cgi->a({-href => href(action=>"commit", hash=>$co{'id'})},
6312                               "commit") .
6313                       " | " .
6314                       $cgi->a({-href => href(action=>"tree", hash=>$co{'tree'},
6315                                              hash_base=>$co{'id'})},
6316                               "tree") .
6317                       "</td>\n" .
6318                       "</tr>\n";
6319         }
6320
6321         print "</table>\n";
6322
6323         git_footer_html();
6324 }
6325
6326 sub git_search_files {
6327         my %co = @_;
6328
6329         local $/ = "\n";
6330         open my $fd, "-|", git_cmd(), 'grep', '-n', '-z',
6331                 $search_use_regexp ? ('-E', '-i') : '-F',
6332                 $searchtext, $co{'tree'}
6333                         or die_error(500, "Open git-grep failed");
6334
6335         git_header_html();
6336
6337         git_print_page_nav('','', $hash,$co{'tree'},$hash);
6338         git_print_header_div('commit', esc_html($co{'title'}), $hash);
6339
6340         print "<table class=\"grep_search\">\n";
6341         my $alternate = 1;
6342         my $matches = 0;
6343         my $lastfile = '';
6344         my $file_href;
6345         while (my $line = <$fd>) {
6346                 chomp $line;
6347                 my ($file, $lno, $ltext, $binary);
6348                 last if ($matches++ > 1000);
6349                 if ($line =~ /^Binary file (.+) matches$/) {
6350                         $file = $1;
6351                         $binary = 1;
6352                 } else {
6353                         ($file, $lno, $ltext) = split(/\0/, $line, 3);
6354                         $file =~ s/^$co{'tree'}://;
6355                 }
6356                 if ($file ne $lastfile) {
6357                         $lastfile and print "</td></tr>\n";
6358                         if ($alternate++) {
6359                                 print "<tr class=\"dark\">\n";
6360                         } else {
6361                                 print "<tr class=\"light\">\n";
6362                         }
6363                         $file_href = href(action=>"blob", hash_base=>$co{'id'},
6364                                           file_name=>$file);
6365                         print "<td class=\"list\">".
6366                                 $cgi->a({-href => $file_href, -class => "list"}, esc_path($file));
6367                         print "</td><td>\n";
6368                         $lastfile = $file;
6369                 }
6370                 if ($binary) {
6371                         print "<div class=\"binary\">Binary file</div>\n";
6372                 } else {
6373                         $ltext = untabify($ltext);
6374                         if ($ltext =~ m/^(.*)($search_regexp)(.*)$/i) {
6375                                 $ltext = esc_html($1, -nbsp=>1);
6376                                 $ltext .= '<span class="match">';
6377                                 $ltext .= esc_html($2, -nbsp=>1);
6378                                 $ltext .= '</span>';
6379                                 $ltext .= esc_html($3, -nbsp=>1);
6380                         } else {
6381                                 $ltext = esc_html($ltext, -nbsp=>1);
6382                         }
6383                         print "<div class=\"pre\">" .
6384                                 $cgi->a({-href => $file_href.'#l'.$lno,
6385                                         -class => "linenr"}, sprintf('%4i', $lno)) .
6386                                 ' ' .  $ltext . "</div>\n";
6387                 }
6388         }
6389         if ($lastfile) {
6390                 print "</td></tr>\n";
6391                 if ($matches > 1000) {
6392                         print "<div class=\"diff nodifferences\">Too many matches, listing trimmed</div>\n";
6393                 }
6394         } else {
6395                 print "<div class=\"diff nodifferences\">No matches found</div>\n";
6396         }
6397         close $fd;
6398
6399         print "</table>\n";
6400
6401         git_footer_html();
6402 }
6403
6404 sub git_search_grep_body {
6405         my ($commitlist, $from, $to, $extra) = @_;
6406         $from = 0 unless defined $from;
6407         $to = $#{$commitlist} if (!defined $to || $#{$commitlist} < $to);
6408
6409         print "<table class=\"commit_search\">\n";
6410         my $alternate = 1;
6411         for (my $i = $from; $i <= $to; $i++) {
6412                 my %co = %{$commitlist->[$i]};
6413                 if (!%co) {
6414                         next;
6415                 }
6416                 my $commit = $co{'id'};
6417                 if ($alternate) {
6418                         print "<tr class=\"dark\">\n";
6419                 } else {
6420                         print "<tr class=\"light\">\n";
6421                 }
6422                 $alternate ^= 1;
6423                 print "<td title=\"$co{'age_string_age'}\"><i>$co{'age_string_date'}</i></td>\n" .
6424                       format_author_html('td', \%co, 15, 5) .
6425                       "<td>" .
6426                       $cgi->a({-href => href(action=>"commit", hash=>$co{'id'}),
6427                                -class => "list subject"},
6428                               chop_and_escape_str($co{'title'}, 50) . "<br/>");
6429                 my $comment = $co{'comment'};
6430                 foreach my $line (@$comment) {
6431                         if ($line =~ m/^(.*?)($search_regexp)(.*)$/i) {
6432                                 my ($lead, $match, $trail) = ($1, $2, $3);
6433                                 $match = chop_str($match, 70, 5, 'center');
6434                                 my $contextlen = int((80 - length($match))/2);
6435                                 $contextlen = 30 if ($contextlen > 30);
6436                                 $lead  = chop_str($lead,  $contextlen, 10, 'left');
6437                                 $trail = chop_str($trail, $contextlen, 10, 'right');
6438
6439                                 $lead  = esc_html($lead);
6440                                 $match = esc_html($match);
6441                                 $trail = esc_html($trail);
6442
6443                                 print "$lead<span class=\"match\">$match</span>$trail<br />";
6444                         }
6445                 }
6446                 print "</td>\n" .
6447                       "<td class=\"link\">" .
6448                       $cgi->a({-href => href(action=>"commit", hash=>$co{'id'})}, "commit") .
6449                       " | " .
6450                       $cgi->a({-href => href(action=>"commitdiff", hash=>$co{'id'})}, "commitdiff") .
6451                       " | " .
6452                       $cgi->a({-href => href(action=>"tree", hash=>$co{'tree'}, hash_base=>$co{'id'})}, "tree");
6453                 print "</td>\n" .
6454                       "</tr>\n";
6455         }
6456         if (defined $extra) {
6457                 print "<tr>\n" .
6458                       "<td colspan=\"3\">$extra</td>\n" .
6459                       "</tr>\n";
6460         }
6461         print "</table>\n";
6462 }
6463
6464 ## ======================================================================
6465 ## ======================================================================
6466 ## actions
6467
6468 sub git_project_list {
6469         my $order = $input_params{'order'};
6470         if (defined $order && $order !~ m/none|project|descr|owner|age/) {
6471                 die_error(400, "Unknown order parameter");
6472         }
6473
6474         my @list = git_get_projects_list($project_filter, $strict_export);
6475         if (!@list) {
6476                 die_error(404, "No projects found");
6477         }
6478
6479         git_header_html();
6480         if (defined $home_text && -f $home_text) {
6481                 print "<div class=\"index_include\">\n";
6482                 insert_file($home_text);
6483                 print "</div>\n";
6484         }
6485
6486         git_project_search_form($searchtext, $search_use_regexp);
6487         git_project_list_body(\@list, $order);
6488         git_footer_html();
6489 }
6490
6491 sub git_forks {
6492         my $order = $input_params{'order'};
6493         if (defined $order && $order !~ m/none|project|descr|owner|age/) {
6494                 die_error(400, "Unknown order parameter");
6495         }
6496
6497         my $filter = $project;
6498         $filter =~ s/\.git$//;
6499         my @list = git_get_projects_list($filter);
6500         if (!@list) {
6501                 die_error(404, "No forks found");
6502         }
6503
6504         git_header_html();
6505         git_print_page_nav('','');
6506         git_print_header_div('summary', "$project forks");
6507         git_project_list_body(\@list, $order);
6508         git_footer_html();
6509 }
6510
6511 sub git_project_index {
6512         my @projects = git_get_projects_list($project_filter, $strict_export);
6513         if (!@projects) {
6514                 die_error(404, "No projects found");
6515         }
6516
6517         print $cgi->header(
6518                 -type => 'text/plain',
6519                 -charset => 'utf-8',
6520                 -content_disposition => 'inline; filename="index.aux"');
6521
6522         foreach my $pr (@projects) {
6523                 if (!exists $pr->{'owner'}) {
6524                         $pr->{'owner'} = git_get_project_owner("$pr->{'path'}");
6525                 }
6526
6527                 my ($path, $owner) = ($pr->{'path'}, $pr->{'owner'});
6528                 # quote as in CGI::Util::encode, but keep the slash, and use '+' for ' '
6529                 $path  =~ s/([^a-zA-Z0-9_.\-\/ ])/sprintf("%%%02X", ord($1))/eg;
6530                 $owner =~ s/([^a-zA-Z0-9_.\-\/ ])/sprintf("%%%02X", ord($1))/eg;
6531                 $path  =~ s/ /\+/g;
6532                 $owner =~ s/ /\+/g;
6533
6534                 print "$path $owner\n";
6535         }
6536 }
6537
6538 sub git_summary {
6539         my $descr = git_get_project_description($project) || "none";
6540         my %co = parse_commit("HEAD");
6541         my %cd = %co ? parse_date($co{'committer_epoch'}, $co{'committer_tz'}) : ();
6542         my $head = $co{'id'};
6543         my $remote_heads = gitweb_check_feature('remote_heads');
6544
6545         my $owner = git_get_project_owner($project);
6546
6547         my $refs = git_get_references();
6548         # These get_*_list functions return one more to allow us to see if
6549         # there are more ...
6550         my @taglist  = git_get_tags_list(16);
6551         my @headlist = git_get_heads_list(16);
6552         my %remotedata = $remote_heads ? git_get_remotes_list() : ();
6553         my @forklist;
6554         my $check_forks = gitweb_check_feature('forks');
6555
6556         if ($check_forks) {
6557                 # find forks of a project
6558                 my $filter = $project;
6559                 $filter =~ s/\.git$//;
6560                 @forklist = git_get_projects_list($filter);
6561                 # filter out forks of forks
6562                 @forklist = filter_forks_from_projects_list(\@forklist)
6563                         if (@forklist);
6564         }
6565
6566         git_header_html();
6567         git_print_page_nav('summary','', $head);
6568
6569         print "<div class=\"title\">&nbsp;</div>\n";
6570         print "<table class=\"projects_list\">\n" .
6571               "<tr id=\"metadata_desc\"><td>description</td><td>" . esc_html($descr) . "</td></tr>\n";
6572         if ($owner and not $omit_owner) {
6573                 print  "<tr id=\"metadata_owner\"><td>owner</td><td>" . esc_html($owner) . "</td></tr>\n";
6574         }
6575         if (defined $cd{'rfc2822'}) {
6576                 print "<tr id=\"metadata_lchange\"><td>last change</td>" .
6577                       "<td>".format_timestamp_html(\%cd)."</td></tr>\n";
6578         }
6579
6580         # use per project git URL list in $projectroot/$project/cloneurl
6581         # or make project git URL from git base URL and project name
6582         my $url_tag = "URL";
6583         my @url_list = git_get_project_url_list($project);
6584         @url_list = map { "$_/$project" } @git_base_url_list unless @url_list;
6585         foreach my $git_url (@url_list) {
6586                 next unless $git_url;
6587                 print format_repo_url($url_tag, $git_url);
6588                 $url_tag = "";
6589         }
6590
6591         # Tag cloud
6592         my $show_ctags = gitweb_check_feature('ctags');
6593         if ($show_ctags) {
6594                 my $ctags = git_get_project_ctags($project);
6595                 if (%$ctags) {
6596                         # without ability to add tags, don't show if there are none
6597                         my $cloud = git_populate_project_tagcloud($ctags);
6598                         print "<tr id=\"metadata_ctags\">" .
6599                               "<td>content tags</td>" .
6600                               "<td>".git_show_project_tagcloud($cloud, 48)."</td>" .
6601                               "</tr>\n";
6602                 }
6603         }
6604
6605         print "</table>\n";
6606
6607         # If XSS prevention is on, we don't include README.html.
6608         # TODO: Allow a readme in some safe format.
6609         if (!$prevent_xss && -s "$projectroot/$project/README.html") {
6610                 print "<div class=\"title\">readme</div>\n" .
6611                       "<div class=\"readme\">\n";
6612                 insert_file("$projectroot/$project/README.html");
6613                 print "\n</div>\n"; # class="readme"
6614         }
6615
6616         # we need to request one more than 16 (0..15) to check if
6617         # those 16 are all
6618         my @commitlist = $head ? parse_commits($head, 17) : ();
6619         if (@commitlist) {
6620                 git_print_header_div('shortlog');
6621                 git_shortlog_body(\@commitlist, 0, 15, $refs,
6622                                   $#commitlist <=  15 ? undef :
6623                                   $cgi->a({-href => href(action=>"shortlog")}, "..."));
6624         }
6625
6626         if (@taglist) {
6627                 git_print_header_div('tags');
6628                 git_tags_body(\@taglist, 0, 15,
6629                               $#taglist <=  15 ? undef :
6630                               $cgi->a({-href => href(action=>"tags")}, "..."));
6631         }
6632
6633         if (@headlist) {
6634                 git_print_header_div('heads');
6635                 git_heads_body(\@headlist, $head, 0, 15,
6636                                $#headlist <= 15 ? undef :
6637                                $cgi->a({-href => href(action=>"heads")}, "..."));
6638         }
6639
6640         if (%remotedata) {
6641                 git_print_header_div('remotes');
6642                 git_remotes_body(\%remotedata, 15, $head);
6643         }
6644
6645         if (@forklist) {
6646                 git_print_header_div('forks');
6647                 git_project_list_body(\@forklist, 'age', 0, 15,
6648                                       $#forklist <= 15 ? undef :
6649                                       $cgi->a({-href => href(action=>"forks")}, "..."),
6650                                       'no_header');
6651         }
6652
6653         git_footer_html();
6654 }
6655
6656 sub git_tag {
6657         my %tag = parse_tag($hash);
6658
6659         if (! %tag) {
6660                 die_error(404, "Unknown tag object");
6661         }
6662
6663         my $head = git_get_head_hash($project);
6664         git_header_html();
6665         git_print_page_nav('','', $head,undef,$head);
6666         git_print_header_div('commit', esc_html($tag{'name'}), $hash);
6667         print "<div class=\"title_text\">\n" .
6668               "<table class=\"object_header\">\n" .
6669               "<tr>\n" .
6670               "<td>object</td>\n" .
6671               "<td>" . $cgi->a({-class => "list", -href => href(action=>$tag{'type'}, hash=>$tag{'object'})},
6672                                $tag{'object'}) . "</td>\n" .
6673               "<td class=\"link\">" . $cgi->a({-href => href(action=>$tag{'type'}, hash=>$tag{'object'})},
6674                                               $tag{'type'}) . "</td>\n" .
6675               "</tr>\n";
6676         if (defined($tag{'author'})) {
6677                 git_print_authorship_rows(\%tag, 'author');
6678         }
6679         print "</table>\n\n" .
6680               "</div>\n";
6681         print "<div class=\"page_body\">";
6682         my $comment = $tag{'comment'};
6683         foreach my $line (@$comment) {
6684                 chomp $line;
6685                 print esc_html($line, -nbsp=>1) . "<br/>\n";
6686         }
6687         print "</div>\n";
6688         git_footer_html();
6689 }
6690
6691 sub git_blame_common {
6692         my $format = shift || 'porcelain';
6693         if ($format eq 'porcelain' && $input_params{'javascript'}) {
6694                 $format = 'incremental';
6695                 $action = 'blame_incremental'; # for page title etc
6696         }
6697
6698         # permissions
6699         gitweb_check_feature('blame')
6700                 or die_error(403, "Blame view not allowed");
6701
6702         # error checking
6703         die_error(400, "No file name given") unless $file_name;
6704         $hash_base ||= git_get_head_hash($project);
6705         die_error(404, "Couldn't find base commit") unless $hash_base;
6706         my %co = parse_commit($hash_base)
6707                 or die_error(404, "Commit not found");
6708         my $ftype = "blob";
6709         if (!defined $hash) {
6710                 $hash = git_get_hash_by_path($hash_base, $file_name, "blob")
6711                         or die_error(404, "Error looking up file");
6712         } else {
6713                 $ftype = git_get_type($hash);
6714                 if ($ftype !~ "blob") {
6715                         die_error(400, "Object is not a blob");
6716                 }
6717         }
6718
6719         my $fd;
6720         if ($format eq 'incremental') {
6721                 # get file contents (as base)
6722                 open $fd, "-|", git_cmd(), 'cat-file', 'blob', $hash
6723                         or die_error(500, "Open git-cat-file failed");
6724         } elsif ($format eq 'data') {
6725                 # run git-blame --incremental
6726                 open $fd, "-|", git_cmd(), "blame", "--incremental",
6727                         $hash_base, "--", $file_name
6728                         or die_error(500, "Open git-blame --incremental failed");
6729         } else {
6730                 # run git-blame --porcelain
6731                 open $fd, "-|", git_cmd(), "blame", '-p',
6732                         $hash_base, '--', $file_name
6733                         or die_error(500, "Open git-blame --porcelain failed");
6734         }
6735         binmode $fd, ':utf8';
6736
6737         # incremental blame data returns early
6738         if ($format eq 'data') {
6739                 print $cgi->header(
6740                         -type=>"text/plain", -charset => "utf-8",
6741                         -status=> "200 OK");
6742                 local $| = 1; # output autoflush
6743                 while (my $line = <$fd>) {
6744                         print to_utf8($line);
6745                 }
6746                 close $fd
6747                         or print "ERROR $!\n";
6748
6749                 print 'END';
6750                 if (defined $t0 && gitweb_check_feature('timed')) {
6751                         print ' '.
6752                               tv_interval($t0, [ gettimeofday() ]).
6753                               ' '.$number_of_git_cmds;
6754                 }
6755                 print "\n";
6756
6757                 return;
6758         }
6759
6760         # page header
6761         git_header_html();
6762         my $formats_nav =
6763                 $cgi->a({-href => href(action=>"blob", -replay=>1)},
6764                         "blob") .
6765                 " | ";
6766         if ($format eq 'incremental') {
6767                 $formats_nav .=
6768                         $cgi->a({-href => href(action=>"blame", javascript=>0, -replay=>1)},
6769                                 "blame") . " (non-incremental)";
6770         } else {
6771                 $formats_nav .=
6772                         $cgi->a({-href => href(action=>"blame_incremental", -replay=>1)},
6773                                 "blame") . " (incremental)";
6774         }
6775         $formats_nav .=
6776                 " | " .
6777                 $cgi->a({-href => href(action=>"history", -replay=>1)},
6778                         "history") .
6779                 " | " .
6780                 $cgi->a({-href => href(action=>$action, file_name=>$file_name)},
6781                         "HEAD");
6782         git_print_page_nav('','', $hash_base,$co{'tree'},$hash_base, $formats_nav);
6783         git_print_header_div('commit', esc_html($co{'title'}), $hash_base);
6784         git_print_page_path($file_name, $ftype, $hash_base);
6785
6786         # page body
6787         if ($format eq 'incremental') {
6788                 print "<noscript>\n<div class=\"error\"><center><b>\n".
6789                       "This page requires JavaScript to run.\n Use ".
6790                       $cgi->a({-href => href(action=>'blame',javascript=>0,-replay=>1)},
6791                               'this page').
6792                       " instead.\n".
6793                       "</b></center></div>\n</noscript>\n";
6794
6795                 print qq!<div id="progress_bar" style="width: 100%; background-color: yellow"></div>\n!;
6796         }
6797
6798         print qq!<div class="page_body">\n!;
6799         print qq!<div id="progress_info">... / ...</div>\n!
6800                 if ($format eq 'incremental');
6801         print qq!<table id="blame_table" class="blame" width="100%">\n!.
6802               #qq!<col width="5.5em" /><col width="2.5em" /><col width="*" />\n!.
6803               qq!<thead>\n!.
6804               qq!<tr><th>Commit</th><th>Line</th><th>Data</th></tr>\n!.
6805               qq!</thead>\n!.
6806               qq!<tbody>\n!;
6807
6808         my @rev_color = qw(light dark);
6809         my $num_colors = scalar(@rev_color);
6810         my $current_color = 0;
6811
6812         if ($format eq 'incremental') {
6813                 my $color_class = $rev_color[$current_color];
6814
6815                 #contents of a file
6816                 my $linenr = 0;
6817         LINE:
6818                 while (my $line = <$fd>) {
6819                         chomp $line;
6820                         $linenr++;
6821
6822                         print qq!<tr id="l$linenr" class="$color_class">!.
6823                               qq!<td class="sha1"><a href=""> </a></td>!.
6824                               qq!<td class="linenr">!.
6825                               qq!<a class="linenr" href="">$linenr</a></td>!;
6826                         print qq!<td class="pre">! . esc_html($line) . "</td>\n";
6827                         print qq!</tr>\n!;
6828                 }
6829
6830         } else { # porcelain, i.e. ordinary blame
6831                 my %metainfo = (); # saves information about commits
6832
6833                 # blame data
6834         LINE:
6835                 while (my $line = <$fd>) {
6836                         chomp $line;
6837                         # the header: <SHA-1> <src lineno> <dst lineno> [<lines in group>]
6838                         # no <lines in group> for subsequent lines in group of lines
6839                         my ($full_rev, $orig_lineno, $lineno, $group_size) =
6840                            ($line =~ /^([0-9a-f]{40}) (\d+) (\d+)(?: (\d+))?$/);
6841                         if (!exists $metainfo{$full_rev}) {
6842                                 $metainfo{$full_rev} = { 'nprevious' => 0 };
6843                         }
6844                         my $meta = $metainfo{$full_rev};
6845                         my $data;
6846                         while ($data = <$fd>) {
6847                                 chomp $data;
6848                                 last if ($data =~ s/^\t//); # contents of line
6849                                 if ($data =~ /^(\S+)(?: (.*))?$/) {
6850                                         $meta->{$1} = $2 unless exists $meta->{$1};
6851                                 }
6852                                 if ($data =~ /^previous /) {
6853                                         $meta->{'nprevious'}++;
6854                                 }
6855                         }
6856                         my $short_rev = substr($full_rev, 0, 8);
6857                         my $author = $meta->{'author'};
6858                         my %date =
6859                                 parse_date($meta->{'author-time'}, $meta->{'author-tz'});
6860                         my $date = $date{'iso-tz'};
6861                         if ($group_size) {
6862                                 $current_color = ($current_color + 1) % $num_colors;
6863                         }
6864                         my $tr_class = $rev_color[$current_color];
6865                         $tr_class .= ' boundary' if (exists $meta->{'boundary'});
6866                         $tr_class .= ' no-previous' if ($meta->{'nprevious'} == 0);
6867                         $tr_class .= ' multiple-previous' if ($meta->{'nprevious'} > 1);
6868                         print "<tr id=\"l$lineno\" class=\"$tr_class\">\n";
6869                         if ($group_size) {
6870                                 print "<td class=\"sha1\"";
6871                                 print " title=\"". esc_html($author) . ", $date\"";
6872                                 print " rowspan=\"$group_size\"" if ($group_size > 1);
6873                                 print ">";
6874                                 print $cgi->a({-href => href(action=>"commit",
6875                                                              hash=>$full_rev,
6876                                                              file_name=>$file_name)},
6877                                               esc_html($short_rev));
6878                                 if ($group_size >= 2) {
6879                                         my @author_initials = ($author =~ /\b([[:upper:]])\B/g);
6880                                         if (@author_initials) {
6881                                                 print "<br />" .
6882                                                       esc_html(join('', @author_initials));
6883                                                 #           or join('.', ...)
6884                                         }
6885                                 }
6886                                 print "</td>\n";
6887                         }
6888                         # 'previous' <sha1 of parent commit> <filename at commit>
6889                         if (exists $meta->{'previous'} &&
6890                             $meta->{'previous'} =~ /^([a-fA-F0-9]{40}) (.*)$/) {
6891                                 $meta->{'parent'} = $1;
6892                                 $meta->{'file_parent'} = unquote($2);
6893                         }
6894                         my $linenr_commit =
6895                                 exists($meta->{'parent'}) ?
6896                                 $meta->{'parent'} : $full_rev;
6897                         my $linenr_filename =
6898                                 exists($meta->{'file_parent'}) ?
6899                                 $meta->{'file_parent'} : unquote($meta->{'filename'});
6900                         my $blamed = href(action => 'blame',
6901                                           file_name => $linenr_filename,
6902                                           hash_base => $linenr_commit);
6903                         print "<td class=\"linenr\">";
6904                         print $cgi->a({ -href => "$blamed#l$orig_lineno",
6905                                         -class => "linenr" },
6906                                       esc_html($lineno));
6907                         print "</td>";
6908                         print "<td class=\"pre\">" . esc_html($data) . "</td>\n";
6909                         print "</tr>\n";
6910                 } # end while
6911
6912         }
6913
6914         # footer
6915         print "</tbody>\n".
6916               "</table>\n"; # class="blame"
6917         print "</div>\n";   # class="blame_body"
6918         close $fd
6919                 or print "Reading blob failed\n";
6920
6921         git_footer_html();
6922 }
6923
6924 sub git_blame {
6925         git_blame_common();
6926 }
6927
6928 sub git_blame_incremental {
6929         git_blame_common('incremental');
6930 }
6931
6932 sub git_blame_data {
6933         git_blame_common('data');
6934 }
6935
6936 sub git_tags {
6937         my $head = git_get_head_hash($project);
6938         git_header_html();
6939         git_print_page_nav('','', $head,undef,$head,format_ref_views('tags'));
6940         git_print_header_div('summary', $project);
6941
6942         my @tagslist = git_get_tags_list();
6943         if (@tagslist) {
6944                 git_tags_body(\@tagslist);
6945         }
6946         git_footer_html();
6947 }
6948
6949 sub git_heads {
6950         my $head = git_get_head_hash($project);
6951         git_header_html();
6952         git_print_page_nav('','', $head,undef,$head,format_ref_views('heads'));
6953         git_print_header_div('summary', $project);
6954
6955         my @headslist = git_get_heads_list();
6956         if (@headslist) {
6957                 git_heads_body(\@headslist, $head);
6958         }
6959         git_footer_html();
6960 }
6961
6962 # used both for single remote view and for list of all the remotes
6963 sub git_remotes {
6964         gitweb_check_feature('remote_heads')
6965                 or die_error(403, "Remote heads view is disabled");
6966
6967         my $head = git_get_head_hash($project);
6968         my $remote = $input_params{'hash'};
6969
6970         my $remotedata = git_get_remotes_list($remote);
6971         die_error(500, "Unable to get remote information") unless defined $remotedata;
6972
6973         unless (%$remotedata) {
6974                 die_error(404, defined $remote ?
6975                         "Remote $remote not found" :
6976                         "No remotes found");
6977         }
6978
6979         git_header_html(undef, undef, -action_extra => $remote);
6980         git_print_page_nav('', '',  $head, undef, $head,
6981                 format_ref_views($remote ? '' : 'remotes'));
6982
6983         fill_remote_heads($remotedata);
6984         if (defined $remote) {
6985                 git_print_header_div('remotes', "$remote remote for $project");
6986                 git_remote_block($remote, $remotedata->{$remote}, undef, $head);
6987         } else {
6988                 git_print_header_div('summary', "$project remotes");
6989                 git_remotes_body($remotedata, undef, $head);
6990         }
6991
6992         git_footer_html();
6993 }
6994
6995 sub git_blob_plain {
6996         my $type = shift;
6997         my $expires;
6998
6999         if (!defined $hash) {
7000                 if (defined $file_name) {
7001                         my $base = $hash_base || git_get_head_hash($project);
7002                         $hash = git_get_hash_by_path($base, $file_name, "blob")
7003                                 or die_error(404, "Cannot find file");
7004                 } else {
7005                         die_error(400, "No file name defined");
7006                 }
7007         } elsif ($hash =~ m/^[0-9a-fA-F]{40}$/) {
7008                 # blobs defined by non-textual hash id's can be cached
7009                 $expires = "+1d";
7010         }
7011
7012         open my $fd, "-|", git_cmd(), "cat-file", "blob", $hash
7013                 or die_error(500, "Open git-cat-file blob '$hash' failed");
7014
7015         # content-type (can include charset)
7016         $type = blob_contenttype($fd, $file_name, $type);
7017
7018         # "save as" filename, even when no $file_name is given
7019         my $save_as = "$hash";
7020         if (defined $file_name) {
7021                 $save_as = $file_name;
7022         } elsif ($type =~ m/^text\//) {
7023                 $save_as .= '.txt';
7024         }
7025
7026         # With XSS prevention on, blobs of all types except a few known safe
7027         # ones are served with "Content-Disposition: attachment" to make sure
7028         # they don't run in our security domain.  For certain image types,
7029         # blob view writes an <img> tag referring to blob_plain view, and we
7030         # want to be sure not to break that by serving the image as an
7031         # attachment (though Firefox 3 doesn't seem to care).
7032         my $sandbox = $prevent_xss &&
7033                 $type !~ m!^(?:text/[a-z]+|image/(?:gif|png|jpeg))(?:[ ;]|$)!;
7034
7035         # serve text/* as text/plain
7036         if ($prevent_xss &&
7037             ($type =~ m!^text/[a-z]+\b(.*)$! ||
7038              ($type =~ m!^[a-z]+/[a-z]\+xml\b(.*)$! && -T $fd))) {
7039                 my $rest = $1;
7040                 $rest = defined $rest ? $rest : '';
7041                 $type = "text/plain$rest";
7042         }
7043
7044         print $cgi->header(
7045                 -type => $type,
7046                 -expires => $expires,
7047                 -content_disposition =>
7048                         ($sandbox ? 'attachment' : 'inline')
7049                         . '; filename="' . $save_as . '"');
7050         local $/ = undef;
7051         binmode STDOUT, ':raw';
7052         print <$fd>;
7053         binmode STDOUT, ':utf8'; # as set at the beginning of gitweb.cgi
7054         close $fd;
7055 }
7056
7057 sub git_blob {
7058         my $expires;
7059
7060         if (!defined $hash) {
7061                 if (defined $file_name) {
7062                         my $base = $hash_base || git_get_head_hash($project);
7063                         $hash = git_get_hash_by_path($base, $file_name, "blob")
7064                                 or die_error(404, "Cannot find file");
7065                 } else {
7066                         die_error(400, "No file name defined");
7067                 }
7068         } elsif ($hash =~ m/^[0-9a-fA-F]{40}$/) {
7069                 # blobs defined by non-textual hash id's can be cached
7070                 $expires = "+1d";
7071         }
7072
7073         my $have_blame = gitweb_check_feature('blame');
7074         open my $fd, "-|", git_cmd(), "cat-file", "blob", $hash
7075                 or die_error(500, "Couldn't cat $file_name, $hash");
7076         my $mimetype = blob_mimetype($fd, $file_name);
7077         # use 'blob_plain' (aka 'raw') view for files that cannot be displayed
7078         if ($mimetype !~ m!^(?:text/|image/(?:gif|png|jpeg)$)! && -B $fd) {
7079                 close $fd;
7080                 return git_blob_plain($mimetype);
7081         }
7082         # we can have blame only for text/* mimetype
7083         $have_blame &&= ($mimetype =~ m!^text/!);
7084
7085         my $highlight = gitweb_check_feature('highlight');
7086         my $syntax = guess_file_syntax($highlight, $file_name);
7087         $fd = run_highlighter($fd, $highlight, $syntax);
7088
7089         git_header_html(undef, $expires);
7090         my $formats_nav = '';
7091         if (defined $hash_base && (my %co = parse_commit($hash_base))) {
7092                 if (defined $file_name) {
7093                         if ($have_blame) {
7094                                 $formats_nav .=
7095                                         $cgi->a({-href => href(action=>"blame", -replay=>1)},
7096                                                 "blame") .
7097                                         " | ";
7098                         }
7099                         $formats_nav .=
7100                                 $cgi->a({-href => href(action=>"history", -replay=>1)},
7101                                         "history") .
7102                                 " | " .
7103                                 $cgi->a({-href => href(action=>"blob_plain", -replay=>1)},
7104                                         "raw") .
7105                                 " | " .
7106                                 $cgi->a({-href => href(action=>"blob",
7107                                                        hash_base=>"HEAD", file_name=>$file_name)},
7108                                         "HEAD");
7109                 } else {
7110                         $formats_nav .=
7111                                 $cgi->a({-href => href(action=>"blob_plain", -replay=>1)},
7112                                         "raw");
7113                 }
7114                 git_print_page_nav('','', $hash_base,$co{'tree'},$hash_base, $formats_nav);
7115                 git_print_header_div('commit', esc_html($co{'title'}), $hash_base);
7116         } else {
7117                 print "<div class=\"page_nav\">\n" .
7118                       "<br/><br/></div>\n" .
7119                       "<div class=\"title\">".esc_html($hash)."</div>\n";
7120         }
7121         git_print_page_path($file_name, "blob", $hash_base);
7122         print "<div class=\"page_body\">\n";
7123         if ($mimetype =~ m!^image/!) {
7124                 print qq!<img class="blob" type="!.esc_attr($mimetype).qq!"!;
7125                 if ($file_name) {
7126                         print qq! alt="!.esc_attr($file_name).qq!" title="!.esc_attr($file_name).qq!"!;
7127                 }
7128                 print qq! src="! .
7129                       href(action=>"blob_plain", hash=>$hash,
7130                            hash_base=>$hash_base, file_name=>$file_name) .
7131                       qq!" />\n!;
7132         } else {
7133                 my $nr;
7134                 while (my $line = <$fd>) {
7135                         chomp $line;
7136                         $nr++;
7137                         $line = untabify($line);
7138                         printf qq!<div class="pre"><a id="l%i" href="%s#l%i" class="linenr">%4i</a> %s</div>\n!,
7139                                $nr, esc_attr(href(-replay => 1)), $nr, $nr,
7140                                $highlight ? sanitize($line) : esc_html($line, -nbsp=>1);
7141                 }
7142         }
7143         close $fd
7144                 or print "Reading blob failed.\n";
7145         print "</div>";
7146         git_footer_html();
7147 }
7148
7149 sub git_tree {
7150         if (!defined $hash_base) {
7151                 $hash_base = "HEAD";
7152         }
7153         if (!defined $hash) {
7154                 if (defined $file_name) {
7155                         $hash = git_get_hash_by_path($hash_base, $file_name, "tree");
7156                 } else {
7157                         $hash = $hash_base;
7158                 }
7159         }
7160         die_error(404, "No such tree") unless defined($hash);
7161
7162         my $show_sizes = gitweb_check_feature('show-sizes');
7163         my $have_blame = gitweb_check_feature('blame');
7164
7165         my @entries = ();
7166         {
7167                 local $/ = "\0";
7168                 open my $fd, "-|", git_cmd(), "ls-tree", '-z',
7169                         ($show_sizes ? '-l' : ()), @extra_options, $hash
7170                         or die_error(500, "Open git-ls-tree failed");
7171                 @entries = map { chomp; $_ } <$fd>;
7172                 close $fd
7173                         or die_error(404, "Reading tree failed");
7174         }
7175
7176         my $refs = git_get_references();
7177         my $ref = format_ref_marker($refs, $hash_base);
7178         git_header_html();
7179         my $basedir = '';
7180         if (defined $hash_base && (my %co = parse_commit($hash_base))) {
7181                 my @views_nav = ();
7182                 if (defined $file_name) {
7183                         push @views_nav,
7184                                 $cgi->a({-href => href(action=>"history", -replay=>1)},
7185                                         "history"),
7186                                 $cgi->a({-href => href(action=>"tree",
7187                                                        hash_base=>"HEAD", file_name=>$file_name)},
7188                                         "HEAD"),
7189                 }
7190                 my $snapshot_links = format_snapshot_links($hash);
7191                 if (defined $snapshot_links) {
7192                         # FIXME: Should be available when we have no hash base as well.
7193                         push @views_nav, $snapshot_links;
7194                 }
7195                 git_print_page_nav('tree','', $hash_base, undef, undef,
7196                                    join(' | ', @views_nav));
7197                 git_print_header_div('commit', esc_html($co{'title'}) . $ref, $hash_base);
7198         } else {
7199                 undef $hash_base;
7200                 print "<div class=\"page_nav\">\n";
7201                 print "<br/><br/></div>\n";
7202                 print "<div class=\"title\">".esc_html($hash)."</div>\n";
7203         }
7204         if (defined $file_name) {
7205                 $basedir = $file_name;
7206                 if ($basedir ne '' && substr($basedir, -1) ne '/') {
7207                         $basedir .= '/';
7208                 }
7209                 git_print_page_path($file_name, 'tree', $hash_base);
7210         }
7211         print "<div class=\"page_body\">\n";
7212         print "<table class=\"tree\">\n";
7213         my $alternate = 1;
7214         # '..' (top directory) link if possible
7215         if (defined $hash_base &&
7216             defined $file_name && $file_name =~ m![^/]+$!) {
7217                 if ($alternate) {
7218                         print "<tr class=\"dark\">\n";
7219                 } else {
7220                         print "<tr class=\"light\">\n";
7221                 }
7222                 $alternate ^= 1;
7223
7224                 my $up = $file_name;
7225                 $up =~ s!/?[^/]+$!!;
7226                 undef $up unless $up;
7227                 # based on git_print_tree_entry
7228                 print '<td class="mode">' . mode_str('040000') . "</td>\n";
7229                 print '<td class="size">&nbsp;</td>'."\n" if $show_sizes;
7230                 print '<td class="list">';
7231                 print $cgi->a({-href => href(action=>"tree",
7232                                              hash_base=>$hash_base,
7233                                              file_name=>$up)},
7234                               "..");
7235                 print "</td>\n";
7236                 print "<td class=\"link\"></td>\n";
7237
7238                 print "</tr>\n";
7239         }
7240         foreach my $line (@entries) {
7241                 my %t = parse_ls_tree_line($line, -z => 1, -l => $show_sizes);
7242
7243                 if ($alternate) {
7244                         print "<tr class=\"dark\">\n";
7245                 } else {
7246                         print "<tr class=\"light\">\n";
7247                 }
7248                 $alternate ^= 1;
7249
7250                 git_print_tree_entry(\%t, $basedir, $hash_base, $have_blame);
7251
7252                 print "</tr>\n";
7253         }
7254         print "</table>\n" .
7255               "</div>";
7256         git_footer_html();
7257 }
7258
7259 sub sanitize_for_filename {
7260     my $name = shift;
7261
7262     $name =~ s!/!-!g;
7263     $name =~ s/[^[:alnum:]_.-]//g;
7264
7265     return $name;
7266 }
7267
7268 sub snapshot_name {
7269         my ($project, $hash) = @_;
7270
7271         # path/to/project.git  -> project
7272         # path/to/project/.git -> project
7273         my $name = to_utf8($project);
7274         $name =~ s,([^/])/*\.git$,$1,;
7275         $name = sanitize_for_filename(basename($name));
7276
7277         my $ver = $hash;
7278         if ($hash =~ /^[0-9a-fA-F]+$/) {
7279                 # shorten SHA-1 hash
7280                 my $full_hash = git_get_full_hash($project, $hash);
7281                 if ($full_hash =~ /^$hash/ && length($hash) > 7) {
7282                         $ver = git_get_short_hash($project, $hash);
7283                 }
7284         } elsif ($hash =~ m!^refs/tags/(.*)$!) {
7285                 # tags don't need shortened SHA-1 hash
7286                 $ver = $1;
7287         } else {
7288                 # branches and other need shortened SHA-1 hash
7289                 my $strip_refs = join '|', map { quotemeta } get_branch_refs();
7290                 if ($hash =~ m!^refs/($strip_refs|remotes)/(.*)$!) {
7291                         my $ref_dir = (defined $1) ? $1 : '';
7292                         $ver = $2;
7293
7294                         $ref_dir = sanitize_for_filename($ref_dir);
7295                         # for refs neither in heads nor remotes we want to
7296                         # add a ref dir to archive name
7297                         if ($ref_dir ne '' and $ref_dir ne 'heads' and $ref_dir ne 'remotes') {
7298                                 $ver = $ref_dir . '-' . $ver;
7299                         }
7300                 }
7301                 $ver .= '-' . git_get_short_hash($project, $hash);
7302         }
7303         # special case of sanitization for filename - we change
7304         # slashes to dots instead of dashes
7305         # in case of hierarchical branch names
7306         $ver =~ s!/!.!g;
7307         $ver =~ s/[^[:alnum:]_.-]//g;
7308
7309         # name = project-version_string
7310         $name = "$name-$ver";
7311
7312         return wantarray ? ($name, $name) : $name;
7313 }
7314
7315 sub exit_if_unmodified_since {
7316         my ($latest_epoch) = @_;
7317         our $cgi;
7318
7319         my $if_modified = $cgi->http('IF_MODIFIED_SINCE');
7320         if (defined $if_modified) {
7321                 my $since;
7322                 if (eval { require HTTP::Date; 1; }) {
7323                         $since = HTTP::Date::str2time($if_modified);
7324                 } elsif (eval { require Time::ParseDate; 1; }) {
7325                         $since = Time::ParseDate::parsedate($if_modified, GMT => 1);
7326                 }
7327                 if (defined $since && $latest_epoch <= $since) {
7328                         my %latest_date = parse_date($latest_epoch);
7329                         print $cgi->header(
7330                                 -last_modified => $latest_date{'rfc2822'},
7331                                 -status => '304 Not Modified');
7332                         goto DONE_GITWEB;
7333                 }
7334         }
7335 }
7336
7337 sub git_snapshot {
7338         my $format = $input_params{'snapshot_format'};
7339         if (!@snapshot_fmts) {
7340                 die_error(403, "Snapshots not allowed");
7341         }
7342         # default to first supported snapshot format
7343         $format ||= $snapshot_fmts[0];
7344         if ($format !~ m/^[a-z0-9]+$/) {
7345                 die_error(400, "Invalid snapshot format parameter");
7346         } elsif (!exists($known_snapshot_formats{$format})) {
7347                 die_error(400, "Unknown snapshot format");
7348         } elsif ($known_snapshot_formats{$format}{'disabled'}) {
7349                 die_error(403, "Snapshot format not allowed");
7350         } elsif (!grep($_ eq $format, @snapshot_fmts)) {
7351                 die_error(403, "Unsupported snapshot format");
7352         }
7353
7354         my $type = git_get_type("$hash^{}");
7355         if (!$type) {
7356                 die_error(404, 'Object does not exist');
7357         }  elsif ($type eq 'blob') {
7358                 die_error(400, 'Object is not a tree-ish');
7359         }
7360
7361         my ($name, $prefix) = snapshot_name($project, $hash);
7362         my $filename = "$name$known_snapshot_formats{$format}{'suffix'}";
7363
7364         my %co = parse_commit($hash);
7365         exit_if_unmodified_since($co{'committer_epoch'}) if %co;
7366
7367         my $cmd = quote_command(
7368                 git_cmd(), 'archive',
7369                 "--format=$known_snapshot_formats{$format}{'format'}",
7370                 "--prefix=$prefix/", $hash);
7371         if (exists $known_snapshot_formats{$format}{'compressor'}) {
7372                 $cmd .= ' | ' . quote_command(@{$known_snapshot_formats{$format}{'compressor'}});
7373         }
7374
7375         $filename =~ s/(["\\])/\\$1/g;
7376         my %latest_date;
7377         if (%co) {
7378                 %latest_date = parse_date($co{'committer_epoch'}, $co{'committer_tz'});
7379         }
7380
7381         print $cgi->header(
7382                 -type => $known_snapshot_formats{$format}{'type'},
7383                 -content_disposition => 'inline; filename="' . $filename . '"',
7384                 %co ? (-last_modified => $latest_date{'rfc2822'}) : (),
7385                 -status => '200 OK');
7386
7387         open my $fd, "-|", $cmd
7388                 or die_error(500, "Execute git-archive failed");
7389         binmode STDOUT, ':raw';
7390         print <$fd>;
7391         binmode STDOUT, ':utf8'; # as set at the beginning of gitweb.cgi
7392         close $fd;
7393 }
7394
7395 sub git_log_generic {
7396         my ($fmt_name, $body_subr, $base, $parent, $file_name, $file_hash) = @_;
7397
7398         my $head = git_get_head_hash($project);
7399         if (!defined $base) {
7400                 $base = $head;
7401         }
7402         if (!defined $page) {
7403                 $page = 0;
7404         }
7405         my $refs = git_get_references();
7406
7407         my $commit_hash = $base;
7408         if (defined $parent) {
7409                 $commit_hash = "$parent..$base";
7410         }
7411         my @commitlist =
7412                 parse_commits($commit_hash, 101, (100 * $page),
7413                               defined $file_name ? ($file_name, "--full-history") : ());
7414
7415         my $ftype;
7416         if (!defined $file_hash && defined $file_name) {
7417                 # some commits could have deleted file in question,
7418                 # and not have it in tree, but one of them has to have it
7419                 for (my $i = 0; $i < @commitlist; $i++) {
7420                         $file_hash = git_get_hash_by_path($commitlist[$i]{'id'}, $file_name);
7421                         last if defined $file_hash;
7422                 }
7423         }
7424         if (defined $file_hash) {
7425                 $ftype = git_get_type($file_hash);
7426         }
7427         if (defined $file_name && !defined $ftype) {
7428                 die_error(500, "Unknown type of object");
7429         }
7430         my %co;
7431         if (defined $file_name) {
7432                 %co = parse_commit($base)
7433                         or die_error(404, "Unknown commit object");
7434         }
7435
7436
7437         my $paging_nav = format_paging_nav($fmt_name, $page, $#commitlist >= 100);
7438         my $next_link = '';
7439         if ($#commitlist >= 100) {
7440                 $next_link =
7441                         $cgi->a({-href => href(-replay=>1, page=>$page+1),
7442                                  -accesskey => "n", -title => "Alt-n"}, "next");
7443         }
7444         my $patch_max = gitweb_get_feature('patches');
7445         if ($patch_max && !defined $file_name) {
7446                 if ($patch_max < 0 || @commitlist <= $patch_max) {
7447                         $paging_nav .= " &sdot; " .
7448                                 $cgi->a({-href => href(action=>"patches", -replay=>1)},
7449                                         "patches");
7450                 }
7451         }
7452
7453         git_header_html();
7454         git_print_page_nav($fmt_name,'', $hash,$hash,$hash, $paging_nav);
7455         if (defined $file_name) {
7456                 git_print_header_div('commit', esc_html($co{'title'}), $base);
7457         } else {
7458                 git_print_header_div('summary', $project)
7459         }
7460         git_print_page_path($file_name, $ftype, $hash_base)
7461                 if (defined $file_name);
7462
7463         $body_subr->(\@commitlist, 0, 99, $refs, $next_link,
7464                      $file_name, $file_hash, $ftype);
7465
7466         git_footer_html();
7467 }
7468
7469 sub git_log {
7470         git_log_generic('log', \&git_log_body,
7471                         $hash, $hash_parent);
7472 }
7473
7474 sub git_commit {
7475         $hash ||= $hash_base || "HEAD";
7476         my %co = parse_commit($hash)
7477             or die_error(404, "Unknown commit object");
7478
7479         my $parent  = $co{'parent'};
7480         my $parents = $co{'parents'}; # listref
7481
7482         # we need to prepare $formats_nav before any parameter munging
7483         my $formats_nav;
7484         if (!defined $parent) {
7485                 # --root commitdiff
7486                 $formats_nav .= '(initial)';
7487         } elsif (@$parents == 1) {
7488                 # single parent commit
7489                 $formats_nav .=
7490                         '(parent: ' .
7491                         $cgi->a({-href => href(action=>"commit",
7492                                                hash=>$parent)},
7493                                 esc_html(substr($parent, 0, 7))) .
7494                         ')';
7495         } else {
7496                 # merge commit
7497                 $formats_nav .=
7498                         '(merge: ' .
7499                         join(' ', map {
7500                                 $cgi->a({-href => href(action=>"commit",
7501                                                        hash=>$_)},
7502                                         esc_html(substr($_, 0, 7)));
7503                         } @$parents ) .
7504                         ')';
7505         }
7506         if (gitweb_check_feature('patches') && @$parents <= 1) {
7507                 $formats_nav .= " | " .
7508                         $cgi->a({-href => href(action=>"patch", -replay=>1)},
7509                                 "patch");
7510         }
7511
7512         if (!defined $parent) {
7513                 $parent = "--root";
7514         }
7515         my @difftree;
7516         open my $fd, "-|", git_cmd(), "diff-tree", '-r', "--no-commit-id",
7517                 @diff_opts,
7518                 (@$parents <= 1 ? $parent : '-c'),
7519                 $hash, "--"
7520                 or die_error(500, "Open git-diff-tree failed");
7521         @difftree = map { chomp; $_ } <$fd>;
7522         close $fd or die_error(404, "Reading git-diff-tree failed");
7523
7524         # non-textual hash id's can be cached
7525         my $expires;
7526         if ($hash =~ m/^[0-9a-fA-F]{40}$/) {
7527                 $expires = "+1d";
7528         }
7529         my $refs = git_get_references();
7530         my $ref = format_ref_marker($refs, $co{'id'});
7531
7532         git_header_html(undef, $expires);
7533         git_print_page_nav('commit', '',
7534                            $hash, $co{'tree'}, $hash,
7535                            $formats_nav);
7536
7537         if (defined $co{'parent'}) {
7538                 git_print_header_div('commitdiff', esc_html($co{'title'}) . $ref, $hash);
7539         } else {
7540                 git_print_header_div('tree', esc_html($co{'title'}) . $ref, $co{'tree'}, $hash);
7541         }
7542         print "<div class=\"title_text\">\n" .
7543               "<table class=\"object_header\">\n";
7544         git_print_authorship_rows(\%co);
7545         print "<tr><td>commit</td><td class=\"sha1\">$co{'id'}</td></tr>\n";
7546         print "<tr>" .
7547               "<td>tree</td>" .
7548               "<td class=\"sha1\">" .
7549               $cgi->a({-href => href(action=>"tree", hash=>$co{'tree'}, hash_base=>$hash),
7550                        class => "list"}, $co{'tree'}) .
7551               "</td>" .
7552               "<td class=\"link\">" .
7553               $cgi->a({-href => href(action=>"tree", hash=>$co{'tree'}, hash_base=>$hash)},
7554                       "tree");
7555         my $snapshot_links = format_snapshot_links($hash);
7556         if (defined $snapshot_links) {
7557                 print " | " . $snapshot_links;
7558         }
7559         print "</td>" .
7560               "</tr>\n";
7561
7562         foreach my $par (@$parents) {
7563                 print "<tr>" .
7564                       "<td>parent</td>" .
7565                       "<td class=\"sha1\">" .
7566                       $cgi->a({-href => href(action=>"commit", hash=>$par),
7567                                class => "list"}, $par) .
7568                       "</td>" .
7569                       "<td class=\"link\">" .
7570                       $cgi->a({-href => href(action=>"commit", hash=>$par)}, "commit") .
7571                       " | " .
7572                       $cgi->a({-href => href(action=>"commitdiff", hash=>$hash, hash_parent=>$par)}, "diff") .
7573                       "</td>" .
7574                       "</tr>\n";
7575         }
7576         print "</table>".
7577               "</div>\n";
7578
7579         print "<div class=\"page_body\">\n";
7580         git_print_log($co{'comment'});
7581         print "</div>\n";
7582
7583         git_difftree_body(\@difftree, $hash, @$parents);
7584
7585         git_footer_html();
7586 }
7587
7588 sub git_object {
7589         # object is defined by:
7590         # - hash or hash_base alone
7591         # - hash_base and file_name
7592         my $type;
7593
7594         # - hash or hash_base alone
7595         if ($hash || ($hash_base && !defined $file_name)) {
7596                 my $object_id = $hash || $hash_base;
7597
7598                 open my $fd, "-|", quote_command(
7599                         git_cmd(), 'cat-file', '-t', $object_id) . ' 2> /dev/null'
7600                         or die_error(404, "Object does not exist");
7601                 $type = <$fd>;
7602                 defined $type && chomp $type;
7603                 close $fd
7604                         or die_error(404, "Object does not exist");
7605
7606         # - hash_base and file_name
7607         } elsif ($hash_base && defined $file_name) {
7608                 $file_name =~ s,/+$,,;
7609
7610                 system(git_cmd(), "cat-file", '-e', $hash_base) == 0
7611                         or die_error(404, "Base object does not exist");
7612
7613                 # here errors should not happen
7614                 open my $fd, "-|", git_cmd(), "ls-tree", $hash_base, "--", $file_name
7615                         or die_error(500, "Open git-ls-tree failed");
7616                 my $line = <$fd>;
7617                 close $fd;
7618
7619                 #'100644 blob 0fa3f3a66fb6a137f6ec2c19351ed4d807070ffa  panic.c'
7620                 unless ($line && $line =~ m/^([0-9]+) (.+) ([0-9a-fA-F]{40})\t/) {
7621                         die_error(404, "File or directory for given base does not exist");
7622                 }
7623                 $type = $2;
7624                 $hash = $3;
7625         } else {
7626                 die_error(400, "Not enough information to find object");
7627         }
7628
7629         print $cgi->redirect(-uri => href(action=>$type, -full=>1,
7630                                           hash=>$hash, hash_base=>$hash_base,
7631                                           file_name=>$file_name),
7632                              -status => '302 Found');
7633 }
7634
7635 sub git_blobdiff {
7636         my $format = shift || 'html';
7637         my $diff_style = $input_params{'diff_style'} || 'inline';
7638
7639         my $fd;
7640         my @difftree;
7641         my %diffinfo;
7642         my $expires;
7643
7644         # preparing $fd and %diffinfo for git_patchset_body
7645         # new style URI
7646         if (defined $hash_base && defined $hash_parent_base) {
7647                 if (defined $file_name) {
7648                         # read raw output
7649                         open $fd, "-|", git_cmd(), "diff-tree", '-r', @diff_opts,
7650                                 $hash_parent_base, $hash_base,
7651                                 "--", (defined $file_parent ? $file_parent : ()), $file_name
7652                                 or die_error(500, "Open git-diff-tree failed");
7653                         @difftree = map { chomp; $_ } <$fd>;
7654                         close $fd
7655                                 or die_error(404, "Reading git-diff-tree failed");
7656                         @difftree
7657                                 or die_error(404, "Blob diff not found");
7658
7659                 } elsif (defined $hash &&
7660                          $hash =~ /[0-9a-fA-F]{40}/) {
7661                         # try to find filename from $hash
7662
7663                         # read filtered raw output
7664                         open $fd, "-|", git_cmd(), "diff-tree", '-r', @diff_opts,
7665                                 $hash_parent_base, $hash_base, "--"
7666                                 or die_error(500, "Open git-diff-tree failed");
7667                         @difftree =
7668                                 # ':100644 100644 03b21826... 3b93d5e7... M     ls-files.c'
7669                                 # $hash == to_id
7670                                 grep { /^:[0-7]{6} [0-7]{6} [0-9a-fA-F]{40} $hash/ }
7671                                 map { chomp; $_ } <$fd>;
7672                         close $fd
7673                                 or die_error(404, "Reading git-diff-tree failed");
7674                         @difftree
7675                                 or die_error(404, "Blob diff not found");
7676
7677                 } else {
7678                         die_error(400, "Missing one of the blob diff parameters");
7679                 }
7680
7681                 if (@difftree > 1) {
7682                         die_error(400, "Ambiguous blob diff specification");
7683                 }
7684
7685                 %diffinfo = parse_difftree_raw_line($difftree[0]);
7686                 $file_parent ||= $diffinfo{'from_file'} || $file_name;
7687                 $file_name   ||= $diffinfo{'to_file'};
7688
7689                 $hash_parent ||= $diffinfo{'from_id'};
7690                 $hash        ||= $diffinfo{'to_id'};
7691
7692                 # non-textual hash id's can be cached
7693                 if ($hash_base =~ m/^[0-9a-fA-F]{40}$/ &&
7694                     $hash_parent_base =~ m/^[0-9a-fA-F]{40}$/) {
7695                         $expires = '+1d';
7696                 }
7697
7698                 # open patch output
7699                 open $fd, "-|", git_cmd(), "diff-tree", '-r', @diff_opts,
7700                         '-p', ($format eq 'html' ? "--full-index" : ()),
7701                         $hash_parent_base, $hash_base,
7702                         "--", (defined $file_parent ? $file_parent : ()), $file_name
7703                         or die_error(500, "Open git-diff-tree failed");
7704         }
7705
7706         # old/legacy style URI -- not generated anymore since 1.4.3.
7707         if (!%diffinfo) {
7708                 die_error('404 Not Found', "Missing one of the blob diff parameters")
7709         }
7710
7711         # header
7712         if ($format eq 'html') {
7713                 my $formats_nav =
7714                         $cgi->a({-href => href(action=>"blobdiff_plain", -replay=>1)},
7715                                 "raw");
7716                 $formats_nav .= diff_style_nav($diff_style);
7717                 git_header_html(undef, $expires);
7718                 if (defined $hash_base && (my %co = parse_commit($hash_base))) {
7719                         git_print_page_nav('','', $hash_base,$co{'tree'},$hash_base, $formats_nav);
7720                         git_print_header_div('commit', esc_html($co{'title'}), $hash_base);
7721                 } else {
7722                         print "<div class=\"page_nav\"><br/>$formats_nav<br/></div>\n";
7723                         print "<div class=\"title\">".esc_html("$hash vs $hash_parent")."</div>\n";
7724                 }
7725                 if (defined $file_name) {
7726                         git_print_page_path($file_name, "blob", $hash_base);
7727                 } else {
7728                         print "<div class=\"page_path\"></div>\n";
7729                 }
7730
7731         } elsif ($format eq 'plain') {
7732                 print $cgi->header(
7733                         -type => 'text/plain',
7734                         -charset => 'utf-8',
7735                         -expires => $expires,
7736                         -content_disposition => 'inline; filename="' . "$file_name" . '.patch"');
7737
7738                 print "X-Git-Url: " . $cgi->self_url() . "\n\n";
7739
7740         } else {
7741                 die_error(400, "Unknown blobdiff format");
7742         }
7743
7744         # patch
7745         if ($format eq 'html') {
7746                 print "<div class=\"page_body\">\n";
7747
7748                 git_patchset_body($fd, $diff_style,
7749                                   [ \%diffinfo ], $hash_base, $hash_parent_base);
7750                 close $fd;
7751
7752                 print "</div>\n"; # class="page_body"
7753                 git_footer_html();
7754
7755         } else {
7756                 while (my $line = <$fd>) {
7757                         $line =~ s!a/($hash|$hash_parent)!'a/'.esc_path($diffinfo{'from_file'})!eg;
7758                         $line =~ s!b/($hash|$hash_parent)!'b/'.esc_path($diffinfo{'to_file'})!eg;
7759
7760                         print $line;
7761
7762                         last if $line =~ m!^\+\+\+!;
7763                 }
7764                 local $/ = undef;
7765                 print <$fd>;
7766                 close $fd;
7767         }
7768 }
7769
7770 sub git_blobdiff_plain {
7771         git_blobdiff('plain');
7772 }
7773
7774 # assumes that it is added as later part of already existing navigation,
7775 # so it returns "| foo | bar" rather than just "foo | bar"
7776 sub diff_style_nav {
7777         my ($diff_style, $is_combined) = @_;
7778         $diff_style ||= 'inline';
7779
7780         return "" if ($is_combined);
7781
7782         my @styles = (inline => 'inline', 'sidebyside' => 'side by side');
7783         my %styles = @styles;
7784         @styles =
7785                 @styles[ map { $_ * 2 } 0..$#styles/2 ];
7786
7787         return join '',
7788                 map { " | ".$_ }
7789                 map {
7790                         $_ eq $diff_style ? $styles{$_} :
7791                         $cgi->a({-href => href(-replay=>1, diff_style => $_)}, $styles{$_})
7792                 } @styles;
7793 }
7794
7795 sub git_commitdiff {
7796         my %params = @_;
7797         my $format = $params{-format} || 'html';
7798         my $diff_style = $input_params{'diff_style'} || 'inline';
7799
7800         my ($patch_max) = gitweb_get_feature('patches');
7801         if ($format eq 'patch') {
7802                 die_error(403, "Patch view not allowed") unless $patch_max;
7803         }
7804
7805         $hash ||= $hash_base || "HEAD";
7806         my %co = parse_commit($hash)
7807             or die_error(404, "Unknown commit object");
7808
7809         # choose format for commitdiff for merge
7810         if (! defined $hash_parent && @{$co{'parents'}} > 1) {
7811                 $hash_parent = '--cc';
7812         }
7813         # we need to prepare $formats_nav before almost any parameter munging
7814         my $formats_nav;
7815         if ($format eq 'html') {
7816                 $formats_nav =
7817                         $cgi->a({-href => href(action=>"commitdiff_plain", -replay=>1)},
7818                                 "raw");
7819                 if ($patch_max && @{$co{'parents'}} <= 1) {
7820                         $formats_nav .= " | " .
7821                                 $cgi->a({-href => href(action=>"patch", -replay=>1)},
7822                                         "patch");
7823                 }
7824                 $formats_nav .= diff_style_nav($diff_style, @{$co{'parents'}} > 1);
7825
7826                 if (defined $hash_parent &&
7827                     $hash_parent ne '-c' && $hash_parent ne '--cc') {
7828                         # commitdiff with two commits given
7829                         my $hash_parent_short = $hash_parent;
7830                         if ($hash_parent =~ m/^[0-9a-fA-F]{40}$/) {
7831                                 $hash_parent_short = substr($hash_parent, 0, 7);
7832                         }
7833                         $formats_nav .=
7834                                 ' (from';
7835                         for (my $i = 0; $i < @{$co{'parents'}}; $i++) {
7836                                 if ($co{'parents'}[$i] eq $hash_parent) {
7837                                         $formats_nav .= ' parent ' . ($i+1);
7838                                         last;
7839                                 }
7840                         }
7841                         $formats_nav .= ': ' .
7842                                 $cgi->a({-href => href(-replay=>1,
7843                                                        hash=>$hash_parent, hash_base=>undef)},
7844                                         esc_html($hash_parent_short)) .
7845                                 ')';
7846                 } elsif (!$co{'parent'}) {
7847                         # --root commitdiff
7848                         $formats_nav .= ' (initial)';
7849                 } elsif (scalar @{$co{'parents'}} == 1) {
7850                         # single parent commit
7851                         $formats_nav .=
7852                                 ' (parent: ' .
7853                                 $cgi->a({-href => href(-replay=>1,
7854                                                        hash=>$co{'parent'}, hash_base=>undef)},
7855                                         esc_html(substr($co{'parent'}, 0, 7))) .
7856                                 ')';
7857                 } else {
7858                         # merge commit
7859                         if ($hash_parent eq '--cc') {
7860                                 $formats_nav .= ' | ' .
7861                                         $cgi->a({-href => href(-replay=>1,
7862                                                                hash=>$hash, hash_parent=>'-c')},
7863                                                 'combined');
7864                         } else { # $hash_parent eq '-c'
7865                                 $formats_nav .= ' | ' .
7866                                         $cgi->a({-href => href(-replay=>1,
7867                                                                hash=>$hash, hash_parent=>'--cc')},
7868                                                 'compact');
7869                         }
7870                         $formats_nav .=
7871                                 ' (merge: ' .
7872                                 join(' ', map {
7873                                         $cgi->a({-href => href(-replay=>1,
7874                                                                hash=>$_, hash_base=>undef)},
7875                                                 esc_html(substr($_, 0, 7)));
7876                                 } @{$co{'parents'}} ) .
7877                                 ')';
7878                 }
7879         }
7880
7881         my $hash_parent_param = $hash_parent;
7882         if (!defined $hash_parent_param) {
7883                 # --cc for multiple parents, --root for parentless
7884                 $hash_parent_param =
7885                         @{$co{'parents'}} > 1 ? '--cc' : $co{'parent'} || '--root';
7886         }
7887
7888         # read commitdiff
7889         my $fd;
7890         my @difftree;
7891         if ($format eq 'html') {
7892                 open $fd, "-|", git_cmd(), "diff-tree", '-r', @diff_opts,
7893                         "--no-commit-id", "--patch-with-raw", "--full-index",
7894                         $hash_parent_param, $hash, "--"
7895                         or die_error(500, "Open git-diff-tree failed");
7896
7897                 while (my $line = <$fd>) {
7898                         chomp $line;
7899                         # empty line ends raw part of diff-tree output
7900                         last unless $line;
7901                         push @difftree, scalar parse_difftree_raw_line($line);
7902                 }
7903
7904         } elsif ($format eq 'plain') {
7905                 open $fd, "-|", git_cmd(), "diff-tree", '-r', @diff_opts,
7906                         '-p', $hash_parent_param, $hash, "--"
7907                         or die_error(500, "Open git-diff-tree failed");
7908         } elsif ($format eq 'patch') {
7909                 # For commit ranges, we limit the output to the number of
7910                 # patches specified in the 'patches' feature.
7911                 # For single commits, we limit the output to a single patch,
7912                 # diverging from the git-format-patch default.
7913                 my @commit_spec = ();
7914                 if ($hash_parent) {
7915                         if ($patch_max > 0) {
7916                                 push @commit_spec, "-$patch_max";
7917                         }
7918                         push @commit_spec, '-n', "$hash_parent..$hash";
7919                 } else {
7920                         if ($params{-single}) {
7921                                 push @commit_spec, '-1';
7922                         } else {
7923                                 if ($patch_max > 0) {
7924                                         push @commit_spec, "-$patch_max";
7925                                 }
7926                                 push @commit_spec, "-n";
7927                         }
7928                         push @commit_spec, '--root', $hash;
7929                 }
7930                 open $fd, "-|", git_cmd(), "format-patch", @diff_opts,
7931                         '--encoding=utf8', '--stdout', @commit_spec
7932                         or die_error(500, "Open git-format-patch failed");
7933         } else {
7934                 die_error(400, "Unknown commitdiff format");
7935         }
7936
7937         # non-textual hash id's can be cached
7938         my $expires;
7939         if ($hash =~ m/^[0-9a-fA-F]{40}$/) {
7940                 $expires = "+1d";
7941         }
7942
7943         # write commit message
7944         if ($format eq 'html') {
7945                 my $refs = git_get_references();
7946                 my $ref = format_ref_marker($refs, $co{'id'});
7947
7948                 git_header_html(undef, $expires);
7949                 git_print_page_nav('commitdiff','', $hash,$co{'tree'},$hash, $formats_nav);
7950                 git_print_header_div('commit', esc_html($co{'title'}) . $ref, $hash);
7951                 print "<div class=\"title_text\">\n" .
7952                       "<table class=\"object_header\">\n";
7953                 git_print_authorship_rows(\%co);
7954                 print "</table>".
7955                       "</div>\n";
7956                 print "<div class=\"page_body\">\n";
7957                 if (@{$co{'comment'}} > 1) {
7958                         print "<div class=\"log\">\n";
7959                         git_print_log($co{'comment'}, -final_empty_line=> 1, -remove_title => 1);
7960                         print "</div>\n"; # class="log"
7961                 }
7962
7963         } elsif ($format eq 'plain') {
7964                 my $refs = git_get_references("tags");
7965                 my $tagname = git_get_rev_name_tags($hash);
7966                 my $filename = basename($project) . "-$hash.patch";
7967
7968                 print $cgi->header(
7969                         -type => 'text/plain',
7970                         -charset => 'utf-8',
7971                         -expires => $expires,
7972                         -content_disposition => 'inline; filename="' . "$filename" . '"');
7973                 my %ad = parse_date($co{'author_epoch'}, $co{'author_tz'});
7974                 print "From: " . to_utf8($co{'author'}) . "\n";
7975                 print "Date: $ad{'rfc2822'} ($ad{'tz_local'})\n";
7976                 print "Subject: " . to_utf8($co{'title'}) . "\n";
7977
7978                 print "X-Git-Tag: $tagname\n" if $tagname;
7979                 print "X-Git-Url: " . $cgi->self_url() . "\n\n";
7980
7981                 foreach my $line (@{$co{'comment'}}) {
7982                         print to_utf8($line) . "\n";
7983                 }
7984                 print "---\n\n";
7985         } elsif ($format eq 'patch') {
7986                 my $filename = basename($project) . "-$hash.patch";
7987
7988                 print $cgi->header(
7989                         -type => 'text/plain',
7990                         -charset => 'utf-8',
7991                         -expires => $expires,
7992                         -content_disposition => 'inline; filename="' . "$filename" . '"');
7993         }
7994
7995         # write patch
7996         if ($format eq 'html') {
7997                 my $use_parents = !defined $hash_parent ||
7998                         $hash_parent eq '-c' || $hash_parent eq '--cc';
7999                 git_difftree_body(\@difftree, $hash,
8000                                   $use_parents ? @{$co{'parents'}} : $hash_parent);
8001                 print "<br/>\n";
8002
8003                 git_patchset_body($fd, $diff_style,
8004                                   \@difftree, $hash,
8005                                   $use_parents ? @{$co{'parents'}} : $hash_parent);
8006                 close $fd;
8007                 print "</div>\n"; # class="page_body"
8008                 git_footer_html();
8009
8010         } elsif ($format eq 'plain') {
8011                 local $/ = undef;
8012                 print <$fd>;
8013                 close $fd
8014                         or print "Reading git-diff-tree failed\n";
8015         } elsif ($format eq 'patch') {
8016                 local $/ = undef;
8017                 print <$fd>;
8018                 close $fd
8019                         or print "Reading git-format-patch failed\n";
8020         }
8021 }
8022
8023 sub git_commitdiff_plain {
8024         git_commitdiff(-format => 'plain');
8025 }
8026
8027 # format-patch-style patches
8028 sub git_patch {
8029         git_commitdiff(-format => 'patch', -single => 1);
8030 }
8031
8032 sub git_patches {
8033         git_commitdiff(-format => 'patch');
8034 }
8035
8036 sub git_history {
8037         git_log_generic('history', \&git_history_body,
8038                         $hash_base, $hash_parent_base,
8039                         $file_name, $hash);
8040 }
8041
8042 sub git_search {
8043         $searchtype ||= 'commit';
8044
8045         # check if appropriate features are enabled
8046         gitweb_check_feature('search')
8047                 or die_error(403, "Search is disabled");
8048         if ($searchtype eq 'pickaxe') {
8049                 # pickaxe may take all resources of your box and run for several minutes
8050                 # with every query - so decide by yourself how public you make this feature
8051                 gitweb_check_feature('pickaxe')
8052                         or die_error(403, "Pickaxe search is disabled");
8053         }
8054         if ($searchtype eq 'grep') {
8055                 # grep search might be potentially CPU-intensive, too
8056                 gitweb_check_feature('grep')
8057                         or die_error(403, "Grep search is disabled");
8058         }
8059
8060         if (!defined $searchtext) {
8061                 die_error(400, "Text field is empty");
8062         }
8063         if (!defined $hash) {
8064                 $hash = git_get_head_hash($project);
8065         }
8066         my %co = parse_commit($hash);
8067         if (!%co) {
8068                 die_error(404, "Unknown commit object");
8069         }
8070         if (!defined $page) {
8071                 $page = 0;
8072         }
8073
8074         if ($searchtype eq 'commit' ||
8075             $searchtype eq 'author' ||
8076             $searchtype eq 'committer') {
8077                 git_search_message(%co);
8078         } elsif ($searchtype eq 'pickaxe') {
8079                 git_search_changes(%co);
8080         } elsif ($searchtype eq 'grep') {
8081                 git_search_files(%co);
8082         } else {
8083                 die_error(400, "Unknown search type");
8084         }
8085 }
8086
8087 sub git_search_help {
8088         git_header_html();
8089         git_print_page_nav('','', $hash,$hash,$hash);
8090         print <<EOT;
8091 <p><strong>Pattern</strong> is by default a normal string that is matched precisely (but without
8092 regard to case, except in the case of pickaxe). However, when you check the <em>re</em> checkbox,
8093 the pattern entered is recognized as the POSIX extended
8094 <a href="https://en.wikipedia.org/wiki/Regular_expression">regular expression</a> (also case
8095 insensitive).</p>
8096 <dl>
8097 <dt><b>commit</b></dt>
8098 <dd>The commit messages and authorship information will be scanned for the given pattern.</dd>
8099 EOT
8100         my $have_grep = gitweb_check_feature('grep');
8101         if ($have_grep) {
8102                 print <<EOT;
8103 <dt><b>grep</b></dt>
8104 <dd>All files in the currently selected tree (HEAD unless you are explicitly browsing
8105     a different one) are searched for the given pattern. On large trees, this search can take
8106 a while and put some strain on the server, so please use it with some consideration. Note that
8107 due to git-grep peculiarity, currently if regexp mode is turned off, the matches are
8108 case-sensitive.</dd>
8109 EOT
8110         }
8111         print <<EOT;
8112 <dt><b>author</b></dt>
8113 <dd>Name and e-mail of the change author and date of birth of the patch will be scanned for the given pattern.</dd>
8114 <dt><b>committer</b></dt>
8115 <dd>Name and e-mail of the committer and date of commit will be scanned for the given pattern.</dd>
8116 EOT
8117         my $have_pickaxe = gitweb_check_feature('pickaxe');
8118         if ($have_pickaxe) {
8119                 print <<EOT;
8120 <dt><b>pickaxe</b></dt>
8121 <dd>All commits that caused the string to appear or disappear from any file (changes that
8122 added, removed or "modified" the string) will be listed. This search can take a while and
8123 takes a lot of strain on the server, so please use it wisely. Note that since you may be
8124 interested even in changes just changing the case as well, this search is case sensitive.</dd>
8125 EOT
8126         }
8127         print "</dl>\n";
8128         git_footer_html();
8129 }
8130
8131 sub git_shortlog {
8132         git_log_generic('shortlog', \&git_shortlog_body,
8133                         $hash, $hash_parent);
8134 }
8135
8136 ## ......................................................................
8137 ## feeds (RSS, Atom; OPML)
8138
8139 sub git_feed {
8140         my $format = shift || 'atom';
8141         my $have_blame = gitweb_check_feature('blame');
8142
8143         # Atom: http://www.atomenabled.org/developers/syndication/
8144         # RSS:  http://www.notestips.com/80256B3A007F2692/1/NAMO5P9UPQ
8145         if ($format ne 'rss' && $format ne 'atom') {
8146                 die_error(400, "Unknown web feed format");
8147         }
8148
8149         # log/feed of current (HEAD) branch, log of given branch, history of file/directory
8150         my $head = $hash || 'HEAD';
8151         my @commitlist = parse_commits($head, 150, 0, $file_name);
8152
8153         my %latest_commit;
8154         my %latest_date;
8155         my $content_type = "application/$format+xml";
8156         if (defined $cgi->http('HTTP_ACCEPT') &&
8157                  $cgi->Accept('text/xml') > $cgi->Accept($content_type)) {
8158                 # browser (feed reader) prefers text/xml
8159                 $content_type = 'text/xml';
8160         }
8161         if (defined($commitlist[0])) {
8162                 %latest_commit = %{$commitlist[0]};
8163                 my $latest_epoch = $latest_commit{'committer_epoch'};
8164                 exit_if_unmodified_since($latest_epoch);
8165                 %latest_date = parse_date($latest_epoch, $latest_commit{'committer_tz'});
8166         }
8167         print $cgi->header(
8168                 -type => $content_type,
8169                 -charset => 'utf-8',
8170                 %latest_date ? (-last_modified => $latest_date{'rfc2822'}) : (),
8171                 -status => '200 OK');
8172
8173         # Optimization: skip generating the body if client asks only
8174         # for Last-Modified date.
8175         return if ($cgi->request_method() eq 'HEAD');
8176
8177         # header variables
8178         my $title = "$site_name - $project/$action";
8179         my $feed_type = 'log';
8180         if (defined $hash) {
8181                 $title .= " - '$hash'";
8182                 $feed_type = 'branch log';
8183                 if (defined $file_name) {
8184                         $title .= " :: $file_name";
8185                         $feed_type = 'history';
8186                 }
8187         } elsif (defined $file_name) {
8188                 $title .= " - $file_name";
8189                 $feed_type = 'history';
8190         }
8191         $title .= " $feed_type";
8192         $title = esc_html($title);
8193         my $descr = git_get_project_description($project);
8194         if (defined $descr) {
8195                 $descr = esc_html($descr);
8196         } else {
8197                 $descr = "$project " .
8198                          ($format eq 'rss' ? 'RSS' : 'Atom') .
8199                          " feed";
8200         }
8201         my $owner = git_get_project_owner($project);
8202         $owner = esc_html($owner);
8203
8204         #header
8205         my $alt_url;
8206         if (defined $file_name) {
8207                 $alt_url = href(-full=>1, action=>"history", hash=>$hash, file_name=>$file_name);
8208         } elsif (defined $hash) {
8209                 $alt_url = href(-full=>1, action=>"log", hash=>$hash);
8210         } else {
8211                 $alt_url = href(-full=>1, action=>"summary");
8212         }
8213         print qq!<?xml version="1.0" encoding="utf-8"?>\n!;
8214         if ($format eq 'rss') {
8215                 print <<XML;
8216 <rss version="2.0" xmlns:content="http://purl.org/rss/1.0/modules/content/">
8217 <channel>
8218 XML
8219                 print "<title>$title</title>\n" .
8220                       "<link>$alt_url</link>\n" .
8221                       "<description>$descr</description>\n" .
8222                       "<language>en</language>\n" .
8223                       # project owner is responsible for 'editorial' content
8224                       "<managingEditor>$owner</managingEditor>\n";
8225                 if (defined $logo || defined $favicon) {
8226                         # prefer the logo to the favicon, since RSS
8227                         # doesn't allow both
8228                         my $img = esc_url($logo || $favicon);
8229                         print "<image>\n" .
8230                               "<url>$img</url>\n" .
8231                               "<title>$title</title>\n" .
8232                               "<link>$alt_url</link>\n" .
8233                               "</image>\n";
8234                 }
8235                 if (%latest_date) {
8236                         print "<pubDate>$latest_date{'rfc2822'}</pubDate>\n";
8237                         print "<lastBuildDate>$latest_date{'rfc2822'}</lastBuildDate>\n";
8238                 }
8239                 print "<generator>gitweb v.$version/$git_version</generator>\n";
8240         } elsif ($format eq 'atom') {
8241                 print <<XML;
8242 <feed xmlns="http://www.w3.org/2005/Atom">
8243 XML
8244                 print "<title>$title</title>\n" .
8245                       "<subtitle>$descr</subtitle>\n" .
8246                       '<link rel="alternate" type="text/html" href="' .
8247                       $alt_url . '" />' . "\n" .
8248                       '<link rel="self" type="' . $content_type . '" href="' .
8249                       $cgi->self_url() . '" />' . "\n" .
8250                       "<id>" . href(-full=>1) . "</id>\n" .
8251                       # use project owner for feed author
8252                       "<author><name>$owner</name></author>\n";
8253                 if (defined $favicon) {
8254                         print "<icon>" . esc_url($favicon) . "</icon>\n";
8255                 }
8256                 if (defined $logo) {
8257                         # not twice as wide as tall: 72 x 27 pixels
8258                         print "<logo>" . esc_url($logo) . "</logo>\n";
8259                 }
8260                 if (! %latest_date) {
8261                         # dummy date to keep the feed valid until commits trickle in:
8262                         print "<updated>1970-01-01T00:00:00Z</updated>\n";
8263                 } else {
8264                         print "<updated>$latest_date{'iso-8601'}</updated>\n";
8265                 }
8266                 print "<generator version='$version/$git_version'>gitweb</generator>\n";
8267         }
8268
8269         # contents
8270         for (my $i = 0; $i <= $#commitlist; $i++) {
8271                 my %co = %{$commitlist[$i]};
8272                 my $commit = $co{'id'};
8273                 # we read 150, we always show 30 and the ones more recent than 48 hours
8274                 if (($i >= 20) && ((time - $co{'author_epoch'}) > 48*60*60)) {
8275                         last;
8276                 }
8277                 my %cd = parse_date($co{'author_epoch'}, $co{'author_tz'});
8278
8279                 # get list of changed files
8280                 open my $fd, "-|", git_cmd(), "diff-tree", '-r', @diff_opts,
8281                         $co{'parent'} || "--root",
8282                         $co{'id'}, "--", (defined $file_name ? $file_name : ())
8283                         or next;
8284                 my @difftree = map { chomp; $_ } <$fd>;
8285                 close $fd
8286                         or next;
8287
8288                 # print element (entry, item)
8289                 my $co_url = href(-full=>1, action=>"commitdiff", hash=>$commit);
8290                 if ($format eq 'rss') {
8291                         print "<item>\n" .
8292                               "<title>" . esc_html($co{'title'}) . "</title>\n" .
8293                               "<author>" . esc_html($co{'author'}) . "</author>\n" .
8294                               "<pubDate>$cd{'rfc2822'}</pubDate>\n" .
8295                               "<guid isPermaLink=\"true\">$co_url</guid>\n" .
8296                               "<link>$co_url</link>\n" .
8297                               "<description>" . esc_html($co{'title'}) . "</description>\n" .
8298                               "<content:encoded>" .
8299                               "<![CDATA[\n";
8300                 } elsif ($format eq 'atom') {
8301                         print "<entry>\n" .
8302                               "<title type=\"html\">" . esc_html($co{'title'}) . "</title>\n" .
8303                               "<updated>$cd{'iso-8601'}</updated>\n" .
8304                               "<author>\n" .
8305                               "  <name>" . esc_html($co{'author_name'}) . "</name>\n";
8306                         if ($co{'author_email'}) {
8307                                 print "  <email>" . esc_html($co{'author_email'}) . "</email>\n";
8308                         }
8309                         print "</author>\n" .
8310                               # use committer for contributor
8311                               "<contributor>\n" .
8312                               "  <name>" . esc_html($co{'committer_name'}) . "</name>\n";
8313                         if ($co{'committer_email'}) {
8314                                 print "  <email>" . esc_html($co{'committer_email'}) . "</email>\n";
8315                         }
8316                         print "</contributor>\n" .
8317                               "<published>$cd{'iso-8601'}</published>\n" .
8318                               "<link rel=\"alternate\" type=\"text/html\" href=\"$co_url\" />\n" .
8319                               "<id>$co_url</id>\n" .
8320                               "<content type=\"xhtml\" xml:base=\"" . esc_url($my_url) . "\">\n" .
8321                               "<div xmlns=\"http://www.w3.org/1999/xhtml\">\n";
8322                 }
8323                 my $comment = $co{'comment'};
8324                 print "<pre>\n";
8325                 foreach my $line (@$comment) {
8326                         $line = esc_html($line);
8327                         print "$line\n";
8328                 }
8329                 print "</pre><ul>\n";
8330                 foreach my $difftree_line (@difftree) {
8331                         my %difftree = parse_difftree_raw_line($difftree_line);
8332                         next if !$difftree{'from_id'};
8333
8334                         my $file = $difftree{'file'} || $difftree{'to_file'};
8335
8336                         print "<li>" .
8337                               "[" .
8338                               $cgi->a({-href => href(-full=>1, action=>"blobdiff",
8339                                                      hash=>$difftree{'to_id'}, hash_parent=>$difftree{'from_id'},
8340                                                      hash_base=>$co{'id'}, hash_parent_base=>$co{'parent'},
8341                                                      file_name=>$file, file_parent=>$difftree{'from_file'}),
8342                                       -title => "diff"}, 'D');
8343                         if ($have_blame) {
8344                                 print $cgi->a({-href => href(-full=>1, action=>"blame",
8345                                                              file_name=>$file, hash_base=>$commit),
8346                                               -title => "blame"}, 'B');
8347                         }
8348                         # if this is not a feed of a file history
8349                         if (!defined $file_name || $file_name ne $file) {
8350                                 print $cgi->a({-href => href(-full=>1, action=>"history",
8351                                                              file_name=>$file, hash=>$commit),
8352                                               -title => "history"}, 'H');
8353                         }
8354                         $file = esc_path($file);
8355                         print "] ".
8356                               "$file</li>\n";
8357                 }
8358                 if ($format eq 'rss') {
8359                         print "</ul>]]>\n" .
8360                               "</content:encoded>\n" .
8361                               "</item>\n";
8362                 } elsif ($format eq 'atom') {
8363                         print "</ul>\n</div>\n" .
8364                               "</content>\n" .
8365                               "</entry>\n";
8366                 }
8367         }
8368
8369         # end of feed
8370         if ($format eq 'rss') {
8371                 print "</channel>\n</rss>\n";
8372         } elsif ($format eq 'atom') {
8373                 print "</feed>\n";
8374         }
8375 }
8376
8377 sub git_rss {
8378         git_feed('rss');
8379 }
8380
8381 sub git_atom {
8382         git_feed('atom');
8383 }
8384
8385 sub git_opml {
8386         my @list = git_get_projects_list($project_filter, $strict_export);
8387         if (!@list) {
8388                 die_error(404, "No projects found");
8389         }
8390
8391         print $cgi->header(
8392                 -type => 'text/xml',
8393                 -charset => 'utf-8',
8394                 -content_disposition => 'inline; filename="opml.xml"');
8395
8396         my $title = esc_html($site_name);
8397         my $filter = " within subdirectory ";
8398         if (defined $project_filter) {
8399                 $filter .= esc_html($project_filter);
8400         } else {
8401                 $filter = "";
8402         }
8403         print <<XML;
8404 <?xml version="1.0" encoding="utf-8"?>
8405 <opml version="1.0">
8406 <head>
8407   <title>$title OPML Export$filter</title>
8408 </head>
8409 <body>
8410 <outline text="git RSS feeds">
8411 XML
8412
8413         foreach my $pr (@list) {
8414                 my %proj = %$pr;
8415                 my $head = git_get_head_hash($proj{'path'});
8416                 if (!defined $head) {
8417                         next;
8418                 }
8419                 $git_dir = "$projectroot/$proj{'path'}";
8420                 my %co = parse_commit($head);
8421                 if (!%co) {
8422                         next;
8423                 }
8424
8425                 my $path = esc_html(chop_str($proj{'path'}, 25, 5));
8426                 my $rss  = href('project' => $proj{'path'}, 'action' => 'rss', -full => 1);
8427                 my $html = href('project' => $proj{'path'}, 'action' => 'summary', -full => 1);
8428                 print "<outline type=\"rss\" text=\"$path\" title=\"$path\" xmlUrl=\"$rss\" htmlUrl=\"$html\"/>\n";
8429         }
8430         print <<XML;
8431 </outline>
8432 </body>
8433 </opml>
8434 XML
8435 }