IkiWiki.pm

   1 #!/usr/bin/perl
   2
   3 package IkiWiki;
   4 use warnings;
   5 use strict;
   6 use Encode;
   7 use HTML::Entities;
   8 use URI::Escape q{uri_escape_utf8};
   9 use POSIX;
  10 use open qw{:utf8 :std};
  11
  12 use vars qw{%config %links %oldlinks %pagemtime %pagectime %pagecase
  13             %pagestate %renderedfiles %oldrenderedfiles %pagesources
  14             %destsources %depends %hooks %forcerebuild $gettext_obj};
  15
  16 use Exporter q{import};
  17 our @EXPORT = qw(hook debug error template htmlpage add_depends pagespec_match
  18                  bestlink htmllink readfile writefile pagetype srcfile pagename
  19                  displaytime will_render gettext urlto targetpage
  20                  add_underlay
  21                  %config %links %pagestate %renderedfiles
  22                  %pagesources %destsources);
  23 our $VERSION = 2.00; # plugin interface version, next is ikiwiki version
  24 our $version='unknown'; # VERSION_AUTOREPLACE done by Makefile, DNE
  25 my $installdir=''; # INSTALLDIR_AUTOREPLACE done by Makefile, DNE
  26
  27 # Optimisation.
  28 use Memoize;
  29 memoize("abs2rel");
  30 memoize("pagespec_translate");
  31 memoize("file_pruned");
  32
  33 sub defaultconfig () { #{{{
  34         return
  35         wiki_file_prune_regexps => [qr/(^|\/)\.\.(\/|$)/, qr/^\./, qr/\/\./,
  36                 qr/\.x?html?$/, qr/\.ikiwiki-new$/,
  37                 qr/(^|\/).svn\//, qr/.arch-ids\//, qr/{arch}\//,
  38                 qr/(^|\/)_MTN\//,
  39                 qr/\.dpkg-tmp$/],
  40         wiki_link_regexp => qr{
  41                 \[\[(?=[^!])            # beginning of link
  42                 (?:
  43                         ([^\]\|]+)      # 1: link text
  44                         \|              # followed by '|'
  45                 )?                      # optional
  46
  47                 ([^\]#]+)               # 2: page to link to
  48                 (?:
  49                         \#              # '#', beginning of anchor
  50                         ([^\s\]]+)      # 3: anchor text
  51                 )?                      # optional
  52
  53                 \]\]                    # end of link
  54         }x,
  55         wiki_file_regexp => qr/(^[-[:alnum:]_.:\/+]+$)/,
  56         web_commit_regexp => qr/^web commit (by (.*?(?=: |$))|from (\d+\.\d+\.\d+\.\d+)):?(.*)/,
  57         verbose => 0,
  58         syslog => 0,
  59         wikiname => "wiki",
  60         default_pageext => "mdwn",
  61         htmlext => "html",
  62         cgi => 0,
  63         post_commit => 0,
  64         rcs => '',
  65         url => '',
  66         cgiurl => '',
  67         historyurl => '',
  68         diffurl => '',
  69         rss => 0,
  70         atom => 0,
  71         allowrss => 0,
  72         allowatom => 0,
  73         discussion => 1,
  74         rebuild => 0,
  75         refresh => 0,
  76         getctime => 0,
  77         w3mmode => 0,
  78         wrapper => undef,
  79         wrappermode => undef,
  80         svnpath => "trunk",
  81         gitorigin_branch => "origin",
  82         gitmaster_branch => "master",
  83         srcdir => undef,
  84         destdir => undef,
  85         pingurl => [],
  86         templatedir => "$installdir/share/ikiwiki/templates",
  87         underlaydir => "$installdir/share/ikiwiki/basewiki",
  88         underlaydirs => [],
  89         setup => undef,
  90         adminuser => undef,
  91         adminemail => undef,
  92         plugin => [qw{mdwn inline htmlscrubber passwordauth openid signinedit
  93                       lockedit conditional recentchanges}],
  94         libdir => undef,
  95         timeformat => '%c',
  96         locale => undef,
  97         sslcookie => 0,
  98         httpauth => 0,
  99         userdir => "",
 100         usedirs => 1,
 101         numbacklinks => 10,
 102         account_creation_password => "",
 103         prefix_directives => 0,
 104 } #}}}
 105
 106 sub checkconfig () { #{{{
 107         # locale stuff; avoid LC_ALL since it overrides everything
 108         if (defined $ENV{LC_ALL}) {
 109                 $ENV{LANG} = $ENV{LC_ALL};
 110                 delete $ENV{LC_ALL};
 111         }
 112         if (defined $config{locale}) {
 113                 if (POSIX::setlocale(&POSIX::LC_ALL, $config{locale})) {
 114                         $ENV{LANG}=$config{locale};
 115                         $gettext_obj=undef;
 116                 }
 117         }
 118
 119         if ($config{w3mmode}) {
 120                 eval q{use Cwd q{abs_path}};
 121                 error($@) if $@;
 122                 $config{srcdir}=possibly_foolish_untaint(abs_path($config{srcdir}));
 123                 $config{destdir}=possibly_foolish_untaint(abs_path($config{destdir}));
 124                 $config{cgiurl}="file:///\$LIB/ikiwiki-w3m.cgi/".$config{cgiurl}
 125                         unless $config{cgiurl} =~ m!file:///!;
 126                 $config{url}="file://".$config{destdir};
 127         }
 128
 129         if ($config{cgi} && ! length $config{url}) {
 130                 error(gettext("Must specify url to wiki with --url when using --cgi"));
 131         }
 132
 133         $config{wikistatedir}="$config{srcdir}/.ikiwiki"
 134                 unless exists $config{wikistatedir};
 135
 136         if ($config{rcs}) {
 137                 eval qq{use IkiWiki::Rcs::$config{rcs}};
 138                 if ($@) {
 139                         error("Failed to load RCS module IkiWiki::Rcs::$config{rcs}: $@");
 140                 }
 141         }
 142         else {
 143                 require IkiWiki::Rcs::Stub;
 144         }
 145
 146         if (exists $config{umask}) {
 147                 umask(possibly_foolish_untaint($config{umask}));
 148         }
 149
 150         if (!$config{prefix_directives}) {
 151                 $config{wiki_link_regexp} = qr{
 152                         \[\[                    # beginning of link
 153                         (?:
 154                                 ([^\]\|\n\s]+)  # 1: link text
 155                                 \|              # followed by '|'
 156                         )?                      # optional
 157
 158                         ([^\s\]#]+)             # 2: page to link to
 159                         (?:
 160                                 \#              # '#', beginning of anchor
 161                                 ([^\s\]]+)      # 3: anchor text
 162                         )?                      # optional
 163
 164                         \]\]                    # end of link
 165                 }x,
 166         }
 167
 168         run_hooks(checkconfig => sub { shift->() });
 169
 170         return 1;
 171 } #}}}
 172
 173 sub loadplugins () { #{{{
 174         if (defined $config{libdir}) {
 175                 unshift @INC, possibly_foolish_untaint($config{libdir});
 176         }
 177
 178         loadplugin($_) foreach @{$config{plugin}};
 179
 180         run_hooks(getopt => sub { shift->() });
 181         if (grep /^-/, @ARGV) {
 182                 print STDERR "Unknown option: $_\n"
 183                         foreach grep /^-/, @ARGV;
 184                 usage();
 185         }
 186
 187         return 1;
 188 } #}}}
 189
 190 sub loadplugin ($) { #{{{
 191         my $plugin=shift;
 192
 193         return if grep { $_ eq $plugin} @{$config{disable_plugins}};
 194
 195         foreach my $dir (defined $config{libdir} ? possibly_foolish_untaint($config{libdir}) : undef,
 196                          "$installdir/lib/ikiwiki") {
 197                 if (defined $dir && -x "$dir/plugins/$plugin") {
 198                         require IkiWiki::Plugin::external;
 199                         import IkiWiki::Plugin::external "$dir/plugins/$plugin";
 200                         return 1;
 201                 }
 202         }
 203
 204         my $mod="IkiWiki::Plugin::".possibly_foolish_untaint($plugin);
 205         eval qq{use $mod};
 206         if ($@) {
 207                 error("Failed to load plugin $mod: $@");
 208         }
 209         return 1;
 210 } #}}}
 211
 212 sub error ($;$) { #{{{
 213         my $message=shift;
 214         my $cleaner=shift;
 215         if ($config{cgi}) {
 216                 print "Content-type: text/html\n\n";
 217                 print misctemplate(gettext("Error"),
 218                         "<p>".gettext("Error").": $message</p>");
 219         }
 220         log_message('err' => $message) if $config{syslog};
 221         if (defined $cleaner) {
 222                 $cleaner->();
 223         }
 224         die $message."\n";
 225 } #}}}
 226
 227 sub debug ($) { #{{{
 228         return unless $config{verbose};
 229         return log_message(debug => @_);
 230 } #}}}
 231
 232 my $log_open=0;
 233 sub log_message ($$) { #{{{
 234         my $type=shift;
 235
 236         if ($config{syslog}) {
 237                 require Sys::Syslog;
 238                 if (! $log_open) {
 239                         Sys::Syslog::setlogsock('unix');
 240                         Sys::Syslog::openlog('ikiwiki', '', 'user');
 241                         $log_open=1;
 242                 }
 243                 return eval {
 244                         Sys::Syslog::syslog($type, "[$config{wikiname}] %s", join(" ", @_));
 245                 };
 246         }
 247         elsif (! $config{cgi}) {
 248                 return print "@_\n";
 249         }
 250         else {
 251                 return print STDERR "@_\n";
 252         }
 253 } #}}}
 254
 255 sub possibly_foolish_untaint ($) { #{{{
 256         my $tainted=shift;
 257         my ($untainted)=$tainted=~/(.*)/s;
 258         return $untainted;
 259 } #}}}
 260
 261 sub basename ($) { #{{{
 262         my $file=shift;
 263
 264         $file=~s!.*/+!!;
 265         return $file;
 266 } #}}}
 267
 268 sub dirname ($) { #{{{
 269         my $file=shift;
 270
 271         $file=~s!/*[^/]+$!!;
 272         return $file;
 273 } #}}}
 274
 275 sub pagetype ($) { #{{{
 276         my $page=shift;
 277
 278         if ($page =~ /\.([^.]+)$/) {
 279                 return $1 if exists $hooks{htmlize}{$1};
 280         }
 281         return;
 282 } #}}}
 283
 284 sub isinternal ($) { #{{{
 285         my $page=shift;
 286         return exists $pagesources{$page} &&
 287                 $pagesources{$page} =~ /\._([^.]+)$/;
 288 } #}}}
 289
 290 sub pagename ($) { #{{{
 291         my $file=shift;
 292
 293         my $type=pagetype($file);
 294         my $page=$file;
 295         $page=~s/\Q.$type\E*$// if defined $type;
 296         return $page;
 297 } #}}}
 298
 299 sub targetpage ($$) { #{{{
 300         my $page=shift;
 301         my $ext=shift;
 302
 303         if (! $config{usedirs} || $page =~ /^index$/ ) {
 304                 return $page.".".$ext;
 305         } else {
 306                 return $page."/index.".$ext;
 307         }
 308 } #}}}
 309
 310 sub htmlpage ($) { #{{{
 311         my $page=shift;
 312
 313         return targetpage($page, $config{htmlext});
 314 } #}}}
 315
 316 sub srcfile ($) { #{{{
 317         my $file=shift;
 318
 319         return "$config{srcdir}/$file" if -e "$config{srcdir}/$file";
 320         foreach my $dir (@{$config{underlaydirs}}, $config{underlaydir}) {
 321                 return "$dir/$file" if -e "$dir/$file";
 322         }
 323         error("internal error: $file cannot be found in $config{srcdir} or underlay");
 324         return;
 325 } #}}}
 326
 327 sub add_underlay ($) { #{{{
 328         my $dir=shift;
 329
 330         if ($dir=~/^\//) {
 331                 unshift @{$config{underlaydirs}}, $dir;
 332         }
 333         else {
 334                 unshift @{$config{underlaydirs}}, "$config{underlaydir}/../$dir";
 335         }
 336
 337         return 1;
 338 } #}}}
 339
 340 sub readfile ($;$$) { #{{{
 341         my $file=shift;
 342         my $binary=shift;
 343         my $wantfd=shift;
 344
 345         if (-l $file) {
 346                 error("cannot read a symlink ($file)");
 347         }
 348
 349         local $/=undef;
 350         open (my $in, "<", $file) || error("failed to read $file: $!");
 351         binmode($in) if ($binary);
 352         return \*$in if $wantfd;
 353         my $ret=<$in>;
 354         close $in || error("failed to read $file: $!");
 355         return $ret;
 356 } #}}}
 357
 358 sub writefile ($$$;$$) { #{{{
 359         my $file=shift; # can include subdirs
 360         my $destdir=shift; # directory to put file in
 361         my $content=shift;
 362         my $binary=shift;
 363         my $writer=shift;
 364
 365         my $test=$file;
 366         while (length $test) {
 367                 if (-l "$destdir/$test") {
 368                         error("cannot write to a symlink ($test)");
 369                 }
 370                 $test=dirname($test);
 371         }
 372         my $newfile="$destdir/$file.ikiwiki-new";
 373         if (-l $newfile) {
 374                 error("cannot write to a symlink ($newfile)");
 375         }
 376
 377         my $dir=dirname($newfile);
 378         if (! -d $dir) {
 379                 my $d="";
 380                 foreach my $s (split(m!/+!, $dir)) {
 381                         $d.="$s/";
 382                         if (! -d $d) {
 383                                 mkdir($d) || error("failed to create directory $d: $!");
 384                         }
 385                 }
 386         }
 387
 388         my $cleanup = sub { unlink($newfile) };
 389         open (my $out, '>', $newfile) || error("failed to write $newfile: $!", $cleanup);
 390         binmode($out) if ($binary);
 391         if ($writer) {
 392                 $writer->(\*$out, $cleanup);
 393         }
 394         else {
 395                 print $out $content or error("failed writing to $newfile: $!", $cleanup);
 396         }
 397         close $out || error("failed saving $newfile: $!", $cleanup);
 398         rename($newfile, "$destdir/$file") ||
 399                 error("failed renaming $newfile to $destdir/$file: $!", $cleanup);
 400
 401         return 1;
 402 } #}}}
 403
 404 my %cleared;
 405 sub will_render ($$;$) { #{{{
 406         my $page=shift;
 407         my $dest=shift;
 408         my $clear=shift;
 409
 410         # Important security check.
 411         if (-e "$config{destdir}/$dest" && ! $config{rebuild} &&
 412             ! grep { $_ eq $dest } (@{$renderedfiles{$page}}, @{$oldrenderedfiles{$page}})) {
 413                 error("$config{destdir}/$dest independently created, not overwriting with version from $page");
 414         }
 415
 416         if (! $clear || $cleared{$page}) {
 417                 $renderedfiles{$page}=[$dest, grep { $_ ne $dest } @{$renderedfiles{$page}}];
 418         }
 419         else {
 420                 foreach my $old (@{$renderedfiles{$page}}) {
 421                         delete $destsources{$old};
 422                 }
 423                 $renderedfiles{$page}=[$dest];
 424                 $cleared{$page}=1;
 425         }
 426         $destsources{$dest}=$page;
 427
 428         return 1;
 429 } #}}}
 430
 431 sub bestlink ($$) { #{{{
 432         my $page=shift;
 433         my $link=shift;
 434
 435         my $cwd=$page;
 436         if ($link=~s/^\/+//) {
 437                 # absolute links
 438                 $cwd="";
 439         }
 440         $link=~s/\/$//;
 441
 442         do {
 443                 my $l=$cwd;
 444                 $l.="/" if length $l;
 445                 $l.=$link;
 446
 447                 if (exists $links{$l}) {
 448                         return $l;
 449                 }
 450                 elsif (exists $pagecase{lc $l}) {
 451                         return $pagecase{lc $l};
 452                 }
 453         } while $cwd=~s!/?[^/]+$!!;
 454
 455         if (length $config{userdir}) {
 456                 my $l = "$config{userdir}/".lc($link);
 457                 if (exists $links{$l}) {
 458                         return $l;
 459                 }
 460                 elsif (exists $pagecase{lc $l}) {
 461                         return $pagecase{lc $l};
 462                 }
 463         }
 464
 465         #print STDERR "warning: page $page, broken link: $link\n";
 466         return "";
 467 } #}}}
 468
 469 sub isinlinableimage ($) { #{{{
 470         my $file=shift;
 471
 472         return $file =~ /\.(png|gif|jpg|jpeg)$/i;
 473 } #}}}
 474
 475 sub pagetitle ($;$) { #{{{
 476         my $page=shift;
 477         my $unescaped=shift;
 478
 479         if ($unescaped) {
 480                 $page=~s/(__(\d+)__|_)/$1 eq '_' ? ' ' : chr($2)/eg;
 481         }
 482         else {
 483                 $page=~s/(__(\d+)__|_)/$1 eq '_' ? ' ' : "&#$2;"/eg;
 484         }
 485
 486         return $page;
 487 } #}}}
 488
 489 sub titlepage ($) { #{{{
 490         my $title=shift;
 491         $title=~s/([^-[:alnum:]:+\/.])/$1 eq ' ' ? '_' : "__".ord($1)."__"/eg;
 492         return $title;
 493 } #}}}
 494
 495 sub linkpage ($) { #{{{
 496         my $link=shift;
 497         $link=~s/([^-[:alnum:]:+\/._])/$1 eq ' ' ? '_' : "__".ord($1)."__"/eg;
 498         return $link;
 499 } #}}}
 500
 501 sub cgiurl (@) { #{{{
 502         my %params=@_;
 503
 504         return $config{cgiurl}."?".
 505                 join("&amp;", map $_."=".uri_escape_utf8($params{$_}), keys %params);
 506 } #}}}
 507
 508 sub baseurl (;$) { #{{{
 509         my $page=shift;
 510
 511         return "$config{url}/" if ! defined $page;
 512
 513         $page=htmlpage($page);
 514         $page=~s/[^\/]+$//;
 515         $page=~s/[^\/]+\//..\//g;
 516         return $page;
 517 } #}}}
 518
 519 sub abs2rel ($$) { #{{{
 520         # Work around very innefficient behavior in File::Spec if abs2rel
 521         # is passed two relative paths. It's much faster if paths are
 522         # absolute! (Debian bug #376658; fixed in debian unstable now)
 523         my $path="/".shift;
 524         my $base="/".shift;
 525
 526         require File::Spec;
 527         my $ret=File::Spec->abs2rel($path, $base);
 528         $ret=~s/^// if defined $ret;
 529         return $ret;
 530 } #}}}
 531
 532 sub displaytime ($;$) { #{{{
 533         my $time=shift;
 534         my $format=shift;
 535         if (! defined $format) {
 536                 $format=$config{timeformat};
 537         }
 538
 539         # strftime doesn't know about encodings, so make sure
 540         # its output is properly treated as utf8
 541         return decode_utf8(POSIX::strftime($format, localtime($time)));
 542 } #}}}
 543
 544 sub beautify_url ($) { #{{{
 545         my $url=shift;
 546
 547         if ($config{usedirs}) {
 548                 $url =~ s!/index.$config{htmlext}$!/!;
 549         }
 550         $url =~ s!^$!./!; # Browsers don't like empty links...
 551
 552         return $url;
 553 } #}}}
 554
 555 sub urlto ($$) { #{{{
 556         my $to=shift;
 557         my $from=shift;
 558
 559         if (! length $to) {
 560                 return beautify_url(baseurl($from));
 561         }
 562
 563         if (! $destsources{$to}) {
 564                 $to=htmlpage($to);
 565         }
 566
 567         my $link = abs2rel($to, dirname(htmlpage($from)));
 568
 569         return beautify_url($link);
 570 } #}}}
 571
 572 sub htmllink ($$$;@) { #{{{
 573         my $lpage=shift; # the page doing the linking
 574         my $page=shift; # the page that will contain the link (different for inline)
 575         my $link=shift;
 576         my %opts=@_;
 577
 578         $link=~s/\/$//;
 579
 580         my $bestlink;
 581         if (! $opts{forcesubpage}) {
 582                 $bestlink=bestlink($lpage, $link);
 583         }
 584         else {
 585                 $bestlink="$lpage/".lc($link);
 586         }
 587
 588         my $linktext;
 589         if (defined $opts{linktext}) {
 590                 $linktext=$opts{linktext};
 591         }
 592         else {
 593                 $linktext=pagetitle(basename($link));
 594         }
 595
 596         return "<span class=\"selflink\">$linktext</span>"
 597                 if length $bestlink && $page eq $bestlink &&
 598                    ! defined $opts{anchor};
 599
 600         if (! $destsources{$bestlink}) {
 601                 $bestlink=htmlpage($bestlink);
 602
 603                 if (! $destsources{$bestlink}) {
 604                         return $linktext unless length $config{cgiurl};
 605                         return "<span class=\"createlink\"><a href=\"".
 606                                 cgiurl(
 607                                         do => "create",
 608                                         page => pagetitle(lc($link), 1),
 609                                         from => $lpage
 610                                 ).
 611                                 "\">?</a>$linktext</span>"
 612                 }
 613         }
 614
 615         $bestlink=abs2rel($bestlink, dirname(htmlpage($page)));
 616         $bestlink=beautify_url($bestlink);
 617
 618         if (! $opts{noimageinline} && isinlinableimage($bestlink)) {
 619                 return "<img src=\"$bestlink\" alt=\"$linktext\" />";
 620         }
 621
 622         if (defined $opts{anchor}) {
 623                 $bestlink.="#".$opts{anchor};
 624         }
 625
 626         my @attrs;
 627         if (defined $opts{rel}) {
 628                 push @attrs, ' rel="'.$opts{rel}.'"';
 629         }
 630         if (defined $opts{class}) {
 631                 push @attrs, ' class="'.$opts{class}.'"';
 632         }
 633
 634         return "<a href=\"$bestlink\"@attrs>$linktext</a>";
 635 } #}}}
 636
 637 sub userlink ($) { #{{{
 638         my $user=shift;
 639
 640         my $oiduser=eval { openiduser($user) };
 641         if (defined $oiduser) {
 642                 return "<a href=\"$user\">$oiduser</a>";
 643         }
 644         else {
 645                 return htmllink("", "", escapeHTML(
 646                         length $config{userdir} ? $config{userdir}."/".$user : $user
 647                 ), noimageinline => 1);
 648         }
 649 } #}}}
 650
 651 sub htmlize ($$$) { #{{{
 652         my $page=shift;
 653         my $type=shift;
 654         my $content=shift;
 655
 656         my $oneline = $content !~ /\n/;
 657
 658         if (exists $hooks{htmlize}{$type}) {
 659                 $content=$hooks{htmlize}{$type}{call}->(
 660                         page => $page,
 661                         content => $content,
 662                 );
 663         }
 664         else {
 665                 error("htmlization of $type not supported");
 666         }
 667
 668         run_hooks(sanitize => sub {
 669                 $content=shift->(
 670                         page => $page,
 671                         content => $content,
 672                 );
 673         });
 674
 675         if ($oneline) {
 676                 # hack to get rid of enclosing junk added by markdown
 677                 # and other htmlizers
 678                 $content=~s/^<p>//i;
 679                 $content=~s/<\/p>$//i;
 680                 chomp $content;
 681         }
 682
 683         return $content;
 684 } #}}}
 685
 686 sub linkify ($$$) { #{{{
 687         my $lpage=shift; # the page containing the links
 688         my $page=shift; # the page the link will end up on (different for inline)
 689         my $content=shift;
 690
 691         $content =~ s{(\\?)$config{wiki_link_regexp}}{
 692                 defined $2
 693                         ? ( $1
 694                                 ? "[[$2|$3".($4 ? "#$4" : "")."]]"
 695                                 : htmllink($lpage, $page, linkpage($3),
 696                                         anchor => $4, linktext => pagetitle($2)))
 697                         : ( $1
 698                                 ? "[[$3".($4 ? "#$4" : "")."]]"
 699                                 : htmllink($lpage, $page, linkpage($3),
 700                                         anchor => $4))
 701         }eg;
 702
 703         return $content;
 704 } #}}}
 705
 706 my %preprocessing;
 707 our $preprocess_preview=0;
 708 sub preprocess ($$$;$$) { #{{{
 709         my $page=shift; # the page the data comes from
 710         my $destpage=shift; # the page the data will appear in (different for inline)
 711         my $content=shift;
 712         my $scan=shift;
 713         my $preview=shift;
 714
 715         # Using local because it needs to be set within any nested calls
 716         # of this function.
 717         local $preprocess_preview=$preview if defined $preview;
 718
 719         my $handle=sub {
 720                 my $escape=shift;
 721                 my $prefix=shift;
 722                 my $command=shift;
 723                 my $params=shift;
 724                 if (length $escape) {
 725                         return "[[$prefix$command $params]]";
 726                 }
 727                 elsif (exists $hooks{preprocess}{$command}) {
 728                         return "" if $scan && ! $hooks{preprocess}{$command}{scan};
 729                         # Note: preserve order of params, some plugins may
 730                         # consider it significant.
 731                         my @params;
 732                         while ($params =~ m{
 733                                 (?:([-\w]+)=)?          # 1: named parameter key?
 734                                 (?:
 735                                         """(.*?)"""     # 2: triple-quoted value
 736                                 |
 737                                         "([^"]+)"       # 3: single-quoted value
 738                                 |
 739                                         (\S+)           # 4: unquoted value
 740                                 )
 741                                 (?:\s+|$)               # delimiter to next param
 742                         }sgx) {
 743                                 my $key=$1;
 744                                 my $val;
 745                                 if (defined $2) {
 746                                         $val=$2;
 747                                         $val=~s/\r\n/\n/mg;
 748                                         $val=~s/^\n+//g;
 749                                         $val=~s/\n+$//g;
 750                                 }
 751                                 elsif (defined $3) {
 752                                         $val=$3;
 753                                 }
 754                                 elsif (defined $4) {
 755                                         $val=$4;
 756                                 }
 757
 758                                 if (defined $key) {
 759                                         push @params, $key, $val;
 760                                 }
 761                                 else {
 762                                         push @params, $val, '';
 763                                 }
 764                         }
 765                         if ($preprocessing{$page}++ > 3) {
 766                                 # Avoid loops of preprocessed pages preprocessing
 767                                 # other pages that preprocess them, etc.
 768                                 #translators: The first parameter is a
 769                                 #translators: preprocessor directive name,
 770                                 #translators: the second a page name, the
 771                                 #translators: third a number.
 772                                 return "[[".sprintf(gettext("%s preprocessing loop detected on %s at depth %i"),
 773                                         $command, $page, $preprocessing{$page}).
 774                                 "]]";
 775                         }
 776                         my $ret;
 777                         if (! $scan) {
 778                                 $ret=$hooks{preprocess}{$command}{call}->(
 779                                         @params,
 780                                         page => $page,
 781                                         destpage => $destpage,
 782                                         preview => $preprocess_preview,
 783                                 );
 784                         }
 785                         else {
 786                                 # use void context during scan pass
 787                                 $hooks{preprocess}{$command}{call}->(
 788                                         @params,
 789                                         page => $page,
 790                                         destpage => $destpage,
 791                                         preview => $preprocess_preview,
 792                                 );
 793                                 $ret="";
 794                         }
 795                         $preprocessing{$page}--;
 796                         return $ret;
 797                 }
 798                 else {
 799                         return "[[$prefix$command $params]]";
 800                 }
 801         };
 802
 803         my $regex;
 804         if ($config{prefix_directives}) {
 805                 $regex = qr{
 806                         (\\?)           # 1: escape?
 807                         \[\[(!)         # directive open; 2: prefix
 808                         ([-\w]+)        # 3: command
 809                         (               # 4: the parameters..
 810                                 \s+     # Must have space if parameters present
 811                                 (?:
 812                                         (?:[-\w]+=)?            # named parameter key?
 813                                         (?:
 814                                                 """.*?"""       # triple-quoted value
 815                                                 |
 816                                                 "[^"]+"         # single-quoted value
 817                                                 |
 818                                                 [^\s\]]+        # unquoted value
 819                                         )
 820                                         \s*                     # whitespace or end
 821                                                                 # of directive
 822                                 )
 823                         *)?             # 0 or more parameters
 824                         \]\]            # directive closed
 825                 }sx;
 826         } else {
 827                 $regex = qr{
 828                         (\\?)           # 1: escape?
 829                         \[\[(!?)        # directive open; 2: optional prefix
 830                         ([-\w]+)        # 3: command
 831                         \s+
 832                         (               # 4: the parameters..
 833                                 (?:
 834                                         (?:[-\w]+=)?            # named parameter key?
 835                                         (?:
 836                                                 """.*?"""       # triple-quoted value
 837                                                 |
 838                                                 "[^"]+"         # single-quoted value
 839                                                 |
 840                                                 [^\s\]]+        # unquoted value
 841                                         )
 842                                         \s*                     # whitespace or end
 843                                                                 # of directive
 844                                 )
 845                         *)              # 0 or more parameters
 846                         \]\]            # directive closed
 847                 }sx;
 848         }
 849
 850         $content =~ s{$regex}{$handle->($1, $2, $3, $4)}eg;
 851         return $content;
 852 } #}}}
 853
 854 sub filter ($$$) { #{{{
 855         my $page=shift;
 856         my $destpage=shift;
 857         my $content=shift;
 858
 859         run_hooks(filter => sub {
 860                 $content=shift->(page => $page, destpage => $destpage,
 861                         content => $content);
 862         });
 863
 864         return $content;
 865 } #}}}
 866
 867 sub indexlink () { #{{{
 868         return "<a href=\"$config{url}\">$config{wikiname}</a>";
 869 } #}}}
 870
 871 my $wikilock;
 872
 873 sub lockwiki (;$) { #{{{
 874         my $wait=@_ ? shift : 1;
 875         # Take an exclusive lock on the wiki to prevent multiple concurrent
 876         # run issues. The lock will be dropped on program exit.
 877         if (! -d $config{wikistatedir}) {
 878                 mkdir($config{wikistatedir});
 879         }
 880         open($wikilock, '>', "$config{wikistatedir}/lockfile") ||
 881                 error ("cannot write to $config{wikistatedir}/lockfile: $!");
 882         if (! flock($wikilock, 2 | 4)) { # LOCK_EX | LOCK_NB
 883                 if ($wait) {
 884                         debug("wiki seems to be locked, waiting for lock");
 885                         my $wait=600; # arbitrary, but don't hang forever to
 886                                       # prevent process pileup
 887                         for (1..$wait) {
 888                                 return if flock($wikilock, 2 | 4);
 889                                 sleep 1;
 890                         }
 891                         error("wiki is locked; waited $wait seconds without lock being freed (possible stuck process or stale lock?)");
 892                 }
 893                 else {
 894                         return 0;
 895                 }
 896         }
 897         return 1;
 898 } #}}}
 899
 900 sub unlockwiki () { #{{{
 901         return close($wikilock) if $wikilock;
 902         return;
 903 } #}}}
 904
 905 my $commitlock;
 906
 907 sub commit_hook_enabled () { #{{{
 908         open($commitlock, '+>', "$config{wikistatedir}/commitlock") ||
 909                 error("cannot write to $config{wikistatedir}/commitlock: $!");
 910         if (! flock($commitlock, 1 | 4)) { # LOCK_SH | LOCK_NB to test
 911                 close($commitlock) || error("failed closing commitlock: $!");
 912                 return 0;
 913         }
 914         close($commitlock) || error("failed closing commitlock: $!");
 915         return 1;
 916 } #}}}
 917
 918 sub disable_commit_hook () { #{{{
 919         open($commitlock, '>', "$config{wikistatedir}/commitlock") ||
 920                 error("cannot write to $config{wikistatedir}/commitlock: $!");
 921         if (! flock($commitlock, 2)) { # LOCK_EX
 922                 error("failed to get commit lock");
 923         }
 924         return 1;
 925 } #}}}
 926
 927 sub enable_commit_hook () { #{{{
 928         return close($commitlock) if $commitlock;
 929         return;
 930 } #}}}
 931
 932 sub loadindex () { #{{{
 933         %oldrenderedfiles=%pagectime=();
 934         if (! $config{rebuild}) {
 935                 %pagesources=%pagemtime=%oldlinks=%links=%depends=
 936                         %destsources=%renderedfiles=%pagecase=%pagestate=();
 937         }
 938         open (my $in, "<", "$config{wikistatedir}/index") || return;
 939         while (<$in>) {
 940                 $_=possibly_foolish_untaint($_);
 941                 chomp;
 942                 my %items;
 943                 $items{link}=[];
 944                 $items{dest}=[];
 945                 foreach my $i (split(/ /, $_)) {
 946                         my ($item, $val)=split(/=/, $i, 2);
 947                         push @{$items{$item}}, decode_entities($val);
 948                 }
 949
 950                 next unless exists $items{src}; # skip bad lines for now
 951
 952                 my $page=pagename($items{src}[0]);
 953                 if (! $config{rebuild}) {
 954                         $pagesources{$page}=$items{src}[0];
 955                         $pagemtime{$page}=$items{mtime}[0];
 956                         $oldlinks{$page}=[@{$items{link}}];
 957                         $links{$page}=[@{$items{link}}];
 958                         $depends{$page}=$items{depends}[0] if exists $items{depends};
 959                         $destsources{$_}=$page foreach @{$items{dest}};
 960                         $renderedfiles{$page}=[@{$items{dest}}];
 961                         $pagecase{lc $page}=$page;
 962                         foreach my $k (grep /_/, keys %items) {
 963                                 my ($id, $key)=split(/_/, $k, 2);
 964                                 $pagestate{$page}{decode_entities($id)}{decode_entities($key)}=$items{$k}[0];
 965                         }
 966                 }
 967                 $oldrenderedfiles{$page}=[@{$items{dest}}];
 968                 $pagectime{$page}=$items{ctime}[0];
 969         }
 970         return close($in);
 971 } #}}}
 972
 973 sub saveindex () { #{{{
 974         run_hooks(savestate => sub { shift->() });
 975
 976         my %hookids;
 977         foreach my $type (keys %hooks) {
 978                 $hookids{encode_entities($_)}=1 foreach keys %{$hooks{$type}};
 979         }
 980         my @hookids=sort keys %hookids;
 981
 982         if (! -d $config{wikistatedir}) {
 983                 mkdir($config{wikistatedir});
 984         }
 985         my $newfile="$config{wikistatedir}/index.new";
 986         my $cleanup = sub { unlink($newfile) };
 987         open (my $out, '>', $newfile) || error("cannot write to $newfile: $!", $cleanup);
 988         foreach my $page (keys %pagemtime) {
 989                 next unless $pagemtime{$page};
 990                 my $line="mtime=$pagemtime{$page} ".
 991                         "ctime=$pagectime{$page} ".
 992                         "src=$pagesources{$page}";
 993                 $line.=" dest=$_" foreach @{$renderedfiles{$page}};
 994                 my %count;
 995                 $line.=" link=$_" foreach grep { ++$count{$_} == 1 } @{$links{$page}};
 996                 if (exists $depends{$page}) {
 997                         $line.=" depends=".encode_entities($depends{$page}, " \t\n");
 998                 }
 999                 if (exists $pagestate{$page}) {
1000                         foreach my $id (@hookids) {
1001                                 foreach my $key (keys %{$pagestate{$page}{$id}}) {
1002                                         $line.=' '.$id.'_'.encode_entities($key)."=".encode_entities($pagestate{$page}{$id}{$key}, " \t\n");
1003                                 }
1004                         }
1005                 }
1006                 print $out $line."\n" || error("failed writing to $newfile: $!", $cleanup);
1007         }
1008         close $out || error("failed saving to $newfile: $!", $cleanup);
1009         rename($newfile, "$config{wikistatedir}/index") ||
1010                 error("failed renaming $newfile to $config{wikistatedir}/index", $cleanup);
1011
1012         return 1;
1013 } #}}}
1014
1015 sub template_file ($) { #{{{
1016         my $template=shift;
1017
1018         foreach my $dir ($config{templatedir}, "$installdir/share/ikiwiki/templates") {
1019                 return "$dir/$template" if -e "$dir/$template";
1020         }
1021         return;
1022 } #}}}
1023
1024 sub template_params (@) { #{{{
1025         my $filename=template_file(shift);
1026
1027         if (! defined $filename) {
1028                 return if wantarray;
1029                 return "";
1030         }
1031
1032         my @ret=(
1033                 filter => sub {
1034                         my $text_ref = shift;
1035                         ${$text_ref} = decode_utf8(${$text_ref});
1036                 },
1037                 filename => $filename,
1038                 loop_context_vars => 1,
1039                 die_on_bad_params => 0,
1040                 @_
1041         );
1042         return wantarray ? @ret : {@ret};
1043 } #}}}
1044
1045 sub template ($;@) { #{{{
1046         require HTML::Template;
1047         return HTML::Template->new(template_params(@_));
1048 } #}}}
1049
1050 sub misctemplate ($$;@) { #{{{
1051         my $title=shift;
1052         my $pagebody=shift;
1053
1054         my $template=template("misc.tmpl");
1055         $template->param(
1056                 title => $title,
1057                 indexlink => indexlink(),
1058                 wikiname => $config{wikiname},
1059                 pagebody => $pagebody,
1060                 baseurl => baseurl(),
1061                 @_,
1062         );
1063         run_hooks(pagetemplate => sub {
1064                 shift->(page => "", destpage => "", template => $template);
1065         });
1066         return $template->output;
1067 }#}}}
1068
1069 sub hook (@) { # {{{
1070         my %param=@_;
1071
1072         if (! exists $param{type} || ! ref $param{call} || ! exists $param{id}) {
1073                 error 'hook requires type, call, and id parameters';
1074         }
1075
1076         return if $param{no_override} && exists $hooks{$param{type}}{$param{id}};
1077
1078         $hooks{$param{type}}{$param{id}}=\%param;
1079         return 1;
1080 } # }}}
1081
1082 sub run_hooks ($$) { # {{{
1083         # Calls the given sub for each hook of the given type,
1084         # passing it the hook function to call.
1085         my $type=shift;
1086         my $sub=shift;
1087
1088         if (exists $hooks{$type}) {
1089                 my @deferred;
1090                 foreach my $id (keys %{$hooks{$type}}) {
1091                         if ($hooks{$type}{$id}{last}) {
1092                                 push @deferred, $id;
1093                                 next;
1094                         }
1095                         $sub->($hooks{$type}{$id}{call});
1096                 }
1097                 foreach my $id (@deferred) {
1098                         $sub->($hooks{$type}{$id}{call});
1099                 }
1100         }
1101
1102         return 1;
1103 } #}}}
1104
1105 sub globlist_to_pagespec ($) { #{{{
1106         my @globlist=split(' ', shift);
1107
1108         my (@spec, @skip);
1109         foreach my $glob (@globlist) {
1110                 if ($glob=~/^!(.*)/) {
1111                         push @skip, $glob;
1112                 }
1113                 else {
1114                         push @spec, $glob;
1115                 }
1116         }
1117
1118         my $spec=join(' or ', @spec);
1119         if (@skip) {
1120                 my $skip=join(' and ', @skip);
1121                 if (length $spec) {
1122                         $spec="$skip and ($spec)";
1123                 }
1124                 else {
1125                         $spec=$skip;
1126                 }
1127         }
1128         return $spec;
1129 } #}}}
1130
1131 sub is_globlist ($) { #{{{
1132         my $s=shift;
1133         return ( $s =~ /[^\s]+\s+([^\s]+)/ && $1 ne "and" && $1 ne "or" );
1134 } #}}}
1135
1136 sub safequote ($) { #{{{
1137         my $s=shift;
1138         $s=~s/[{}]//g;
1139         return "q{$s}";
1140 } #}}}
1141
1142 sub add_depends ($$) { #{{{
1143         my $page=shift;
1144         my $pagespec=shift;
1145
1146         if (! exists $depends{$page}) {
1147                 $depends{$page}=$pagespec;
1148         }
1149         else {
1150                 $depends{$page}=pagespec_merge($depends{$page}, $pagespec);
1151         }
1152
1153         return 1;
1154 } # }}}
1155
1156 sub file_pruned ($$) { #{{{
1157         require File::Spec;
1158         my $file=File::Spec->canonpath(shift);
1159         my $base=File::Spec->canonpath(shift);
1160         $file =~ s#^\Q$base\E/+##;
1161
1162         my $regexp='('.join('|', @{$config{wiki_file_prune_regexps}}).')';
1163         return $file =~ m/$regexp/ && $file ne $base;
1164 } #}}}
1165
1166 sub gettext { #{{{
1167         # Only use gettext in the rare cases it's needed.
1168         if ((exists $ENV{LANG} && length $ENV{LANG}) ||
1169             (exists $ENV{LC_ALL} && length $ENV{LC_ALL}) ||
1170             (exists $ENV{LC_MESSAGES} && length $ENV{LC_MESSAGES})) {
1171                 if (! $gettext_obj) {
1172                         $gettext_obj=eval q{
1173                                 use Locale::gettext q{textdomain};
1174                                 Locale::gettext->domain('ikiwiki')
1175                         };
1176                         if ($@) {
1177                                 print STDERR "$@";
1178                                 $gettext_obj=undef;
1179                                 return shift;
1180                         }
1181                 }
1182                 return $gettext_obj->get(shift);
1183         }
1184         else {
1185                 return shift;
1186         }
1187 } #}}}
1188
1189 sub pagespec_merge ($$) { #{{{
1190         my $a=shift;
1191         my $b=shift;
1192
1193         return $a if $a eq $b;
1194
1195         # Support for old-style GlobLists.
1196         if (is_globlist($a)) {
1197                 $a=globlist_to_pagespec($a);
1198         }
1199         if (is_globlist($b)) {
1200                 $b=globlist_to_pagespec($b);
1201         }
1202
1203         return "($a) or ($b)";
1204 } #}}}
1205
1206 sub pagespec_translate ($) { #{{{
1207         # This assumes that $page is in scope in the function
1208         # that evalulates the translated pagespec code.
1209         my $spec=shift;
1210
1211         # Support for old-style GlobLists.
1212         if (is_globlist($spec)) {
1213                 $spec=globlist_to_pagespec($spec);
1214         }
1215
1216         # Convert spec to perl code.
1217         my $code="";
1218         while ($spec=~m{
1219                 \s*             # ignore whitespace
1220                 (               # 1: match a single word
1221                         \!              # !
1222                 |
1223                         \(              # (
1224                 |
1225                         \)              # )
1226                 |
1227                         \w+\([^\)]*\)   # command(params)
1228                 |
1229                         [^\s()]+        # any other text
1230                 )
1231                 \s*             # ignore whitespace
1232         }igx) {
1233                 my $word=$1;
1234                 if (lc $word eq 'and') {
1235                         $code.=' &&';
1236                 }
1237                 elsif (lc $word eq 'or') {
1238                         $code.=' ||';
1239                 }
1240                 elsif ($word eq "(" || $word eq ")" || $word eq "!") {
1241                         $code.=' '.$word;
1242                 }
1243                 elsif ($word =~ /^(\w+)\((.*)\)$/) {
1244                         if (exists $IkiWiki::PageSpec::{"match_$1"}) {
1245                                 $code.="IkiWiki::PageSpec::match_$1(\$page, ".safequote($2).", \@params)";
1246                         }
1247                         else {
1248                                 $code.=' 0';
1249                         }
1250                 }
1251                 else {
1252                         $code.=" IkiWiki::PageSpec::match_glob(\$page, ".safequote($word).", \@params)";
1253                 }
1254         }
1255
1256         return $code;
1257 } #}}}
1258
1259 sub pagespec_match ($$;@) { #{{{
1260         my $page=shift;
1261         my $spec=shift;
1262         my @params=@_;
1263
1264         # Backwards compatability with old calling convention.
1265         if (@params == 1) {
1266                 unshift @params, 'location';
1267         }
1268
1269         my $ret=eval pagespec_translate($spec);
1270         return IkiWiki::FailReason->new('syntax error') if $@;
1271         return $ret;
1272 } #}}}
1273
1274 package IkiWiki::FailReason;
1275
1276 use overload ( #{{{
1277         '""'    => sub { ${$_[0]} },
1278         '0+'    => sub { 0 },
1279         '!'     => sub { bless $_[0], 'IkiWiki::SuccessReason'},
1280         fallback => 1,
1281 ); #}}}
1282
1283 sub new { #{{{
1284         return bless \$_[1], $_[0];
1285 } #}}}
1286
1287 package IkiWiki::SuccessReason;
1288
1289 use overload ( #{{{
1290         '""'    => sub { ${$_[0]} },
1291         '0+'    => sub { 1 },
1292         '!'     => sub { bless $_[0], 'IkiWiki::FailReason'},
1293         fallback => 1,
1294 ); #}}}
1295
1296 sub new { #{{{
1297         return bless \$_[1], $_[0];
1298 }; #}}}
1299
1300 package IkiWiki::PageSpec;
1301
1302 sub match_glob ($$;@) { #{{{
1303         my $page=shift;
1304         my $glob=shift;
1305         my %params=@_;
1306
1307         my $from=exists $params{location} ? $params{location} : '';
1308
1309         # relative matching
1310         if ($glob =~ m!^\./!) {
1311                 $from=~s#/?[^/]+$##;
1312                 $glob=~s#^\./##;
1313                 $glob="$from/$glob" if length $from;
1314         }
1315
1316         # turn glob into safe regexp
1317         $glob=quotemeta($glob);
1318         $glob=~s/\\\*/.*/g;
1319         $glob=~s/\\\?/./g;
1320
1321         if ($page=~/^$glob$/i) {
1322                 if (! IkiWiki::isinternal($page) || $params{internal}) {
1323                         return IkiWiki::SuccessReason->new("$glob matches $page");
1324                 }
1325                 else {
1326                         return IkiWiki::FailReason->new("$glob matches $page, but the page is an internal page");
1327                 }
1328         }
1329         else {
1330                 return IkiWiki::FailReason->new("$glob does not match $page");
1331         }
1332 } #}}}
1333
1334 sub match_internal ($$;@) { #{{{
1335         return match_glob($_[0], $_[1], @_, internal => 1)
1336 } #}}}
1337
1338 sub match_link ($$;@) { #{{{
1339         my $page=shift;
1340         my $link=lc(shift);
1341         my %params=@_;
1342
1343         my $from=exists $params{location} ? $params{location} : '';
1344
1345         # relative matching
1346         if ($link =~ m!^\.! && defined $from) {
1347                 $from=~s#/?[^/]+$##;
1348                 $link=~s#^\./##;
1349                 $link="$from/$link" if length $from;
1350         }
1351
1352         my $links = $IkiWiki::links{$page};
1353         return IkiWiki::FailReason->new("$page has no links") unless $links && @{$links};
1354         my $bestlink = IkiWiki::bestlink($from, $link);
1355         foreach my $p (@{$links}) {
1356                 if (length $bestlink) {
1357                         return IkiWiki::SuccessReason->new("$page links to $link")
1358                                 if $bestlink eq IkiWiki::bestlink($page, $p);
1359                 }
1360                 else {
1361                         return IkiWiki::SuccessReason->new("$page links to page $p matching $link")
1362                                 if match_glob($p, $link, %params);
1363                 }
1364         }
1365         return IkiWiki::FailReason->new("$page does not link to $link");
1366 } #}}}
1367
1368 sub match_backlink ($$;@) { #{{{
1369         return match_link($_[1], $_[0], @_);
1370 } #}}}
1371
1372 sub match_created_before ($$;@) { #{{{
1373         my $page=shift;
1374         my $testpage=shift;
1375
1376         if (exists $IkiWiki::pagectime{$testpage}) {
1377                 if ($IkiWiki::pagectime{$page} < $IkiWiki::pagectime{$testpage}) {
1378                         return IkiWiki::SuccessReason->new("$page created before $testpage");
1379                 }
1380                 else {
1381                         return IkiWiki::FailReason->new("$page not created before $testpage");
1382                 }
1383         }
1384         else {
1385                 return IkiWiki::FailReason->new("$testpage has no ctime");
1386         }
1387 } #}}}
1388
1389 sub match_created_after ($$;@) { #{{{
1390         my $page=shift;
1391         my $testpage=shift;
1392
1393         if (exists $IkiWiki::pagectime{$testpage}) {
1394                 if ($IkiWiki::pagectime{$page} > $IkiWiki::pagectime{$testpage}) {
1395                         return IkiWiki::SuccessReason->new("$page created after $testpage");
1396                 }
1397                 else {
1398                         return IkiWiki::FailReason->new("$page not created after $testpage");
1399                 }
1400         }
1401         else {
1402                 return IkiWiki::FailReason->new("$testpage has no ctime");
1403         }
1404 } #}}}
1405
1406 sub match_creation_day ($$;@) { #{{{
1407         if ((gmtime($IkiWiki::pagectime{shift()}))[3] == shift) {
1408                 return IkiWiki::SuccessReason->new('creation_day matched');
1409         }
1410         else {
1411                 return IkiWiki::FailReason->new('creation_day did not match');
1412         }
1413 } #}}}
1414
1415 sub match_creation_month ($$;@) { #{{{
1416         if ((gmtime($IkiWiki::pagectime{shift()}))[4] + 1 == shift) {
1417                 return IkiWiki::SuccessReason->new('creation_month matched');
1418         }
1419         else {
1420                 return IkiWiki::FailReason->new('creation_month did not match');
1421         }
1422 } #}}}
1423
1424 sub match_creation_year ($$;@) { #{{{
1425         if ((gmtime($IkiWiki::pagectime{shift()}))[5] + 1900 == shift) {
1426                 return IkiWiki::SuccessReason->new('creation_year matched');
1427         }
1428         else {
1429                 return IkiWiki::FailReason->new('creation_year did not match');
1430         }
1431 } #}}}
1432
1433 1