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 Storable;
  11 use open qw{:utf8 :std};
  12
  13 use vars qw{%config %links %oldlinks %pagemtime %pagectime %pagecase
  14             %pagestate %renderedfiles %oldrenderedfiles %pagesources
  15             %destsources %depends %hooks %forcerebuild $gettext_obj};
  16
  17 use Exporter q{import};
  18 our @EXPORT = qw(hook debug error template htmlpage add_depends pagespec_match
  19                  bestlink htmllink readfile writefile pagetype srcfile pagename
  20                  displaytime will_render gettext urlto targetpage
  21                  add_underlay
  22                  %config %links %pagestate %renderedfiles
  23                  %pagesources %destsources);
  24 our $VERSION = 2.00; # plugin interface version, next is ikiwiki version
  25 our $version='unknown'; # VERSION_AUTOREPLACE done by Makefile, DNE
  26 my $installdir=''; # INSTALLDIR_AUTOREPLACE done by Makefile, DNE
  27
  28 # Optimisation.
  29 use Memoize;
  30 memoize("abs2rel");
  31 memoize("pagespec_translate");
  32 memoize("file_pruned");
  33
  34 sub defaultconfig () { #{{{
  35         return
  36         wiki_file_prune_regexps => [qr/(^|\/)\.\.(\/|$)/, qr/^\./, qr/\/\./,
  37                 qr/\.x?html?$/, qr/\.ikiwiki-new$/,
  38                 qr/(^|\/).svn\//, qr/.arch-ids\//, qr/{arch}\//,
  39                 qr/(^|\/)_MTN\//,
  40                 qr/\.dpkg-tmp$/],
  41         wiki_file_regexp => qr/(^[-[:alnum:]_.:\/+]+$)/,
  42         web_commit_regexp => qr/^web commit (by (.*?(?=: |$))|from (\d+\.\d+\.\d+\.\d+)):?(.*)/,
  43         verbose => 0,
  44         syslog => 0,
  45         wikiname => "wiki",
  46         default_pageext => "mdwn",
  47         htmlext => "html",
  48         cgi => 0,
  49         post_commit => 0,
  50         rcs => '',
  51         url => '',
  52         cgiurl => '',
  53         historyurl => '',
  54         diffurl => '',
  55         rss => 0,
  56         atom => 0,
  57         allowrss => 0,
  58         allowatom => 0,
  59         discussion => 1,
  60         rebuild => 0,
  61         refresh => 0,
  62         getctime => 0,
  63         w3mmode => 0,
  64         wrapper => undef,
  65         wrappermode => undef,
  66         svnpath => "trunk",
  67         gitorigin_branch => "origin",
  68         gitmaster_branch => "master",
  69         srcdir => undef,
  70         destdir => undef,
  71         pingurl => [],
  72         templatedir => "$installdir/share/ikiwiki/templates",
  73         underlaydir => "$installdir/share/ikiwiki/basewiki",
  74         underlaydirs => [],
  75         setup => undef,
  76         adminuser => undef,
  77         adminemail => undef,
  78         plugin => [qw{mdwn link inline htmlscrubber passwordauth openid
  79                         signinedit lockedit conditional recentchanges}],
  80         libdir => undef,
  81         timeformat => '%c',
  82         locale => undef,
  83         sslcookie => 0,
  84         httpauth => 0,
  85         userdir => "",
  86         usedirs => 1,
  87         numbacklinks => 10,
  88         account_creation_password => "",
  89         prefix_directives => 0,
  90         hardlink => 0,
  91 } #}}}
  92
  93 sub checkconfig () { #{{{
  94         # locale stuff; avoid LC_ALL since it overrides everything
  95         if (defined $ENV{LC_ALL}) {
  96                 $ENV{LANG} = $ENV{LC_ALL};
  97                 delete $ENV{LC_ALL};
  98         }
  99         if (defined $config{locale}) {
 100                 if (POSIX::setlocale(&POSIX::LC_ALL, $config{locale})) {
 101                         $ENV{LANG}=$config{locale};
 102                         $gettext_obj=undef;
 103                 }
 104         }
 105
 106         if ($config{w3mmode}) {
 107                 eval q{use Cwd q{abs_path}};
 108                 error($@) if $@;
 109                 $config{srcdir}=possibly_foolish_untaint(abs_path($config{srcdir}));
 110                 $config{destdir}=possibly_foolish_untaint(abs_path($config{destdir}));
 111                 $config{cgiurl}="file:///\$LIB/ikiwiki-w3m.cgi/".$config{cgiurl}
 112                         unless $config{cgiurl} =~ m!file:///!;
 113                 $config{url}="file://".$config{destdir};
 114         }
 115
 116         if ($config{cgi} && ! length $config{url}) {
 117                 error(gettext("Must specify url to wiki with --url when using --cgi"));
 118         }
 119
 120         $config{wikistatedir}="$config{srcdir}/.ikiwiki"
 121                 unless exists $config{wikistatedir};
 122
 123         if ($config{rcs}) {
 124                 eval qq{use IkiWiki::Rcs::$config{rcs}};
 125                 if ($@) {
 126                         error("Failed to load RCS module IkiWiki::Rcs::$config{rcs}: $@");
 127                 }
 128         }
 129         else {
 130                 require IkiWiki::Rcs::Stub;
 131         }
 132
 133         if (exists $config{umask}) {
 134                 umask(possibly_foolish_untaint($config{umask}));
 135         }
 136
 137         run_hooks(checkconfig => sub { shift->() });
 138
 139         return 1;
 140 } #}}}
 141
 142 sub loadplugins () { #{{{
 143         if (defined $config{libdir}) {
 144                 unshift @INC, possibly_foolish_untaint($config{libdir});
 145         }
 146
 147         loadplugin($_) foreach @{$config{plugin}};
 148
 149         run_hooks(getopt => sub { shift->() });
 150         if (grep /^-/, @ARGV) {
 151                 print STDERR "Unknown option: $_\n"
 152                         foreach grep /^-/, @ARGV;
 153                 usage();
 154         }
 155
 156         return 1;
 157 } #}}}
 158
 159 sub loadplugin ($) { #{{{
 160         my $plugin=shift;
 161
 162         return if grep { $_ eq $plugin} @{$config{disable_plugins}};
 163
 164         foreach my $dir (defined $config{libdir} ? possibly_foolish_untaint($config{libdir}) : undef,
 165                          "$installdir/lib/ikiwiki") {
 166                 if (defined $dir && -x "$dir/plugins/$plugin") {
 167                         require IkiWiki::Plugin::external;
 168                         import IkiWiki::Plugin::external "$dir/plugins/$plugin";
 169                         return 1;
 170                 }
 171         }
 172
 173         my $mod="IkiWiki::Plugin::".possibly_foolish_untaint($plugin);
 174         eval qq{use $mod};
 175         if ($@) {
 176                 error("Failed to load plugin $mod: $@");
 177         }
 178         return 1;
 179 } #}}}
 180
 181 sub error ($;$) { #{{{
 182         my $message=shift;
 183         my $cleaner=shift;
 184         if ($config{cgi}) {
 185                 print "Content-type: text/html\n\n";
 186                 print misctemplate(gettext("Error"),
 187                         "<p>".gettext("Error").": $message</p>");
 188         }
 189         log_message('err' => $message) if $config{syslog};
 190         if (defined $cleaner) {
 191                 $cleaner->();
 192         }
 193         die $message."\n";
 194 } #}}}
 195
 196 sub debug ($) { #{{{
 197         return unless $config{verbose};
 198         return log_message(debug => @_);
 199 } #}}}
 200
 201 my $log_open=0;
 202 sub log_message ($$) { #{{{
 203         my $type=shift;
 204
 205         if ($config{syslog}) {
 206                 require Sys::Syslog;
 207                 if (! $log_open) {
 208                         Sys::Syslog::setlogsock('unix');
 209                         Sys::Syslog::openlog('ikiwiki', '', 'user');
 210                         $log_open=1;
 211                 }
 212                 return eval {
 213                         Sys::Syslog::syslog($type, "[$config{wikiname}] %s", join(" ", @_));
 214                 };
 215         }
 216         elsif (! $config{cgi}) {
 217                 return print "@_\n";
 218         }
 219         else {
 220                 return print STDERR "@_\n";
 221         }
 222 } #}}}
 223
 224 sub possibly_foolish_untaint ($) { #{{{
 225         my $tainted=shift;
 226         my ($untainted)=$tainted=~/(.*)/s;
 227         return $untainted;
 228 } #}}}
 229
 230 sub basename ($) { #{{{
 231         my $file=shift;
 232
 233         $file=~s!.*/+!!;
 234         return $file;
 235 } #}}}
 236
 237 sub dirname ($) { #{{{
 238         my $file=shift;
 239
 240         $file=~s!/*[^/]+$!!;
 241         return $file;
 242 } #}}}
 243
 244 sub pagetype ($) { #{{{
 245         my $page=shift;
 246
 247         if ($page =~ /\.([^.]+)$/) {
 248                 return $1 if exists $hooks{htmlize}{$1};
 249         }
 250         return;
 251 } #}}}
 252
 253 sub isinternal ($) { #{{{
 254         my $page=shift;
 255         return exists $pagesources{$page} &&
 256                 $pagesources{$page} =~ /\._([^.]+)$/;
 257 } #}}}
 258
 259 sub pagename ($) { #{{{
 260         my $file=shift;
 261
 262         my $type=pagetype($file);
 263         my $page=$file;
 264         $page=~s/\Q.$type\E*$// if defined $type;
 265         return $page;
 266 } #}}}
 267
 268 sub targetpage ($$) { #{{{
 269         my $page=shift;
 270         my $ext=shift;
 271
 272         if (! $config{usedirs} || $page =~ /^index$/ ) {
 273                 return $page.".".$ext;
 274         } else {
 275                 return $page."/index.".$ext;
 276         }
 277 } #}}}
 278
 279 sub htmlpage ($) { #{{{
 280         my $page=shift;
 281
 282         return targetpage($page, $config{htmlext});
 283 } #}}}
 284
 285 sub srcfile ($) { #{{{
 286         my $file=shift;
 287
 288         return "$config{srcdir}/$file" if -e "$config{srcdir}/$file";
 289         foreach my $dir (@{$config{underlaydirs}}, $config{underlaydir}) {
 290                 return "$dir/$file" if -e "$dir/$file";
 291         }
 292         error("internal error: $file cannot be found in $config{srcdir} or underlay");
 293         return;
 294 } #}}}
 295
 296 sub add_underlay ($) { #{{{
 297         my $dir=shift;
 298
 299         if ($dir=~/^\//) {
 300                 unshift @{$config{underlaydirs}}, $dir;
 301         }
 302         else {
 303                 unshift @{$config{underlaydirs}}, "$config{underlaydir}/../$dir";
 304         }
 305
 306         return 1;
 307 } #}}}
 308
 309 sub readfile ($;$$) { #{{{
 310         my $file=shift;
 311         my $binary=shift;
 312         my $wantfd=shift;
 313
 314         if (-l $file) {
 315                 error("cannot read a symlink ($file)");
 316         }
 317
 318         local $/=undef;
 319         open (my $in, "<", $file) || error("failed to read $file: $!");
 320         binmode($in) if ($binary);
 321         return \*$in if $wantfd;
 322         my $ret=<$in>;
 323         close $in || error("failed to read $file: $!");
 324         return $ret;
 325 } #}}}
 326
 327 sub prep_writefile ($$) {
 328         my $file=shift;
 329         my $destdir=shift;
 330
 331         my $test=$file;
 332         while (length $test) {
 333                 if (-l "$destdir/$test") {
 334                         error("cannot write to a symlink ($test)");
 335                 }
 336                 $test=dirname($test);
 337         }
 338
 339         my $dir=dirname("$destdir/$file");
 340         if (! -d $dir) {
 341                 my $d="";
 342                 foreach my $s (split(m!/+!, $dir)) {
 343                         $d.="$s/";
 344                         if (! -d $d) {
 345                                 mkdir($d) || error("failed to create directory $d: $!");
 346                         }
 347                 }
 348         }
 349
 350         return 1;
 351 }
 352
 353 sub writefile ($$$;$$) { #{{{
 354         my $file=shift; # can include subdirs
 355         my $destdir=shift; # directory to put file in
 356         my $content=shift;
 357         my $binary=shift;
 358         my $writer=shift;
 359
 360         prep_writefile($file, $destdir);
 361
 362         my $newfile="$destdir/$file.ikiwiki-new";
 363         if (-l $newfile) {
 364                 error("cannot write to a symlink ($newfile)");
 365         }
 366
 367         my $cleanup = sub { unlink($newfile) };
 368         open (my $out, '>', $newfile) || error("failed to write $newfile: $!", $cleanup);
 369         binmode($out) if ($binary);
 370         if ($writer) {
 371                 $writer->(\*$out, $cleanup);
 372         }
 373         else {
 374                 print $out $content or error("failed writing to $newfile: $!", $cleanup);
 375         }
 376         close $out || error("failed saving $newfile: $!", $cleanup);
 377         rename($newfile, "$destdir/$file") ||
 378                 error("failed renaming $newfile to $destdir/$file: $!", $cleanup);
 379
 380         return 1;
 381 } #}}}
 382
 383 my %cleared;
 384 sub will_render ($$;$) { #{{{
 385         my $page=shift;
 386         my $dest=shift;
 387         my $clear=shift;
 388
 389         # Important security check.
 390         if (-e "$config{destdir}/$dest" && ! $config{rebuild} &&
 391             ! grep { $_ eq $dest } (@{$renderedfiles{$page}}, @{$oldrenderedfiles{$page}})) {
 392                 error("$config{destdir}/$dest independently created, not overwriting with version from $page");
 393         }
 394
 395         if (! $clear || $cleared{$page}) {
 396                 $renderedfiles{$page}=[$dest, grep { $_ ne $dest } @{$renderedfiles{$page}}];
 397         }
 398         else {
 399                 foreach my $old (@{$renderedfiles{$page}}) {
 400                         delete $destsources{$old};
 401                 }
 402                 $renderedfiles{$page}=[$dest];
 403                 $cleared{$page}=1;
 404         }
 405         $destsources{$dest}=$page;
 406
 407         return 1;
 408 } #}}}
 409
 410 sub bestlink ($$) { #{{{
 411         my $page=shift;
 412         my $link=shift;
 413
 414         my $cwd=$page;
 415         if ($link=~s/^\/+//) {
 416                 # absolute links
 417                 $cwd="";
 418         }
 419         $link=~s/\/$//;
 420
 421         do {
 422                 my $l=$cwd;
 423                 $l.="/" if length $l;
 424                 $l.=$link;
 425
 426                 if (exists $links{$l}) {
 427                         return $l;
 428                 }
 429                 elsif (exists $pagecase{lc $l}) {
 430                         return $pagecase{lc $l};
 431                 }
 432         } while $cwd=~s!/?[^/]+$!!;
 433
 434         if (length $config{userdir}) {
 435                 my $l = "$config{userdir}/".lc($link);
 436                 if (exists $links{$l}) {
 437                         return $l;
 438                 }
 439                 elsif (exists $pagecase{lc $l}) {
 440                         return $pagecase{lc $l};
 441                 }
 442         }
 443
 444         #print STDERR "warning: page $page, broken link: $link\n";
 445         return "";
 446 } #}}}
 447
 448 sub isinlinableimage ($) { #{{{
 449         my $file=shift;
 450
 451         return $file =~ /\.(png|gif|jpg|jpeg)$/i;
 452 } #}}}
 453
 454 sub pagetitle ($;$) { #{{{
 455         my $page=shift;
 456         my $unescaped=shift;
 457
 458         if ($unescaped) {
 459                 $page=~s/(__(\d+)__|_)/$1 eq '_' ? ' ' : chr($2)/eg;
 460         }
 461         else {
 462                 $page=~s/(__(\d+)__|_)/$1 eq '_' ? ' ' : "&#$2;"/eg;
 463         }
 464
 465         return $page;
 466 } #}}}
 467
 468 sub titlepage ($) { #{{{
 469         my $title=shift;
 470         $title=~s/([^-[:alnum:]:+\/.])/$1 eq ' ' ? '_' : "__".ord($1)."__"/eg;
 471         return $title;
 472 } #}}}
 473
 474 sub linkpage ($) { #{{{
 475         my $link=shift;
 476         $link=~s/([^-[:alnum:]:+\/._])/$1 eq ' ' ? '_' : "__".ord($1)."__"/eg;
 477         return $link;
 478 } #}}}
 479
 480 sub cgiurl (@) { #{{{
 481         my %params=@_;
 482
 483         return $config{cgiurl}."?".
 484                 join("&amp;", map $_."=".uri_escape_utf8($params{$_}), keys %params);
 485 } #}}}
 486
 487 sub baseurl (;$) { #{{{
 488         my $page=shift;
 489
 490         return "$config{url}/" if ! defined $page;
 491
 492         $page=htmlpage($page);
 493         $page=~s/[^\/]+$//;
 494         $page=~s/[^\/]+\//..\//g;
 495         return $page;
 496 } #}}}
 497
 498 sub abs2rel ($$) { #{{{
 499         # Work around very innefficient behavior in File::Spec if abs2rel
 500         # is passed two relative paths. It's much faster if paths are
 501         # absolute! (Debian bug #376658; fixed in debian unstable now)
 502         my $path="/".shift;
 503         my $base="/".shift;
 504
 505         require File::Spec;
 506         my $ret=File::Spec->abs2rel($path, $base);
 507         $ret=~s/^// if defined $ret;
 508         return $ret;
 509 } #}}}
 510
 511 sub displaytime ($;$) { #{{{
 512         my $time=shift;
 513         my $format=shift;
 514         if (! defined $format) {
 515                 $format=$config{timeformat};
 516         }
 517
 518         # strftime doesn't know about encodings, so make sure
 519         # its output is properly treated as utf8
 520         return decode_utf8(POSIX::strftime($format, localtime($time)));
 521 } #}}}
 522
 523 sub beautify_url ($) { #{{{
 524         my $url=shift;
 525
 526         if ($config{usedirs}) {
 527                 $url =~ s!/index.$config{htmlext}$!/!;
 528         }
 529         $url =~ s!^$!./!; # Browsers don't like empty links...
 530
 531         return $url;
 532 } #}}}
 533
 534 sub urlto ($$) { #{{{
 535         my $to=shift;
 536         my $from=shift;
 537
 538         if (! length $to) {
 539                 return beautify_url(baseurl($from));
 540         }
 541
 542         if (! $destsources{$to}) {
 543                 $to=htmlpage($to);
 544         }
 545
 546         my $link = abs2rel($to, dirname(htmlpage($from)));
 547
 548         return beautify_url($link);
 549 } #}}}
 550
 551 sub htmllink ($$$;@) { #{{{
 552         my $lpage=shift; # the page doing the linking
 553         my $page=shift; # the page that will contain the link (different for inline)
 554         my $link=shift;
 555         my %opts=@_;
 556
 557         $link=~s/\/$//;
 558
 559         my $bestlink;
 560         if (! $opts{forcesubpage}) {
 561                 $bestlink=bestlink($lpage, $link);
 562         }
 563         else {
 564                 $bestlink="$lpage/".lc($link);
 565         }
 566
 567         my $linktext;
 568         if (defined $opts{linktext}) {
 569                 $linktext=$opts{linktext};
 570         }
 571         else {
 572                 $linktext=pagetitle(basename($link));
 573         }
 574
 575         return "<span class=\"selflink\">$linktext</span>"
 576                 if length $bestlink && $page eq $bestlink &&
 577                    ! defined $opts{anchor};
 578
 579         if (! $destsources{$bestlink}) {
 580                 $bestlink=htmlpage($bestlink);
 581
 582                 if (! $destsources{$bestlink}) {
 583                         return $linktext unless length $config{cgiurl};
 584                         return "<span class=\"createlink\"><a href=\"".
 585                                 cgiurl(
 586                                         do => "create",
 587                                         page => pagetitle(lc($link), 1),
 588                                         from => $lpage
 589                                 ).
 590                                 "\">?</a>$linktext</span>"
 591                 }
 592         }
 593
 594         $bestlink=abs2rel($bestlink, dirname(htmlpage($page)));
 595         $bestlink=beautify_url($bestlink);
 596
 597         if (! $opts{noimageinline} && isinlinableimage($bestlink)) {
 598                 return "<img src=\"$bestlink\" alt=\"$linktext\" />";
 599         }
 600
 601         if (defined $opts{anchor}) {
 602                 $bestlink.="#".$opts{anchor};
 603         }
 604
 605         my @attrs;
 606         if (defined $opts{rel}) {
 607                 push @attrs, ' rel="'.$opts{rel}.'"';
 608         }
 609         if (defined $opts{class}) {
 610                 push @attrs, ' class="'.$opts{class}.'"';
 611         }
 612
 613         return "<a href=\"$bestlink\"@attrs>$linktext</a>";
 614 } #}}}
 615
 616 sub userlink ($) { #{{{
 617         my $user=shift;
 618
 619         my $oiduser=eval { openiduser($user) };
 620         if (defined $oiduser) {
 621                 return "<a href=\"$user\">$oiduser</a>";
 622         }
 623         else {
 624                 eval q{use CGI 'escapeHTML'};
 625                 error($@) if $@;
 626
 627                 return htmllink("", "", escapeHTML(
 628                         length $config{userdir} ? $config{userdir}."/".$user : $user
 629                 ), noimageinline => 1);
 630         }
 631 } #}}}
 632
 633 sub htmlize ($$$) { #{{{
 634         my $page=shift;
 635         my $type=shift;
 636         my $content=shift;
 637
 638         my $oneline = $content !~ /\n/;
 639
 640         if (exists $hooks{htmlize}{$type}) {
 641                 $content=$hooks{htmlize}{$type}{call}->(
 642                         page => $page,
 643                         content => $content,
 644                 );
 645         }
 646         else {
 647                 error("htmlization of $type not supported");
 648         }
 649
 650         run_hooks(sanitize => sub {
 651                 $content=shift->(
 652                         page => $page,
 653                         content => $content,
 654                 );
 655         });
 656
 657         if ($oneline) {
 658                 # hack to get rid of enclosing junk added by markdown
 659                 # and other htmlizers
 660                 $content=~s/^<p>//i;
 661                 $content=~s/<\/p>$//i;
 662                 chomp $content;
 663         }
 664
 665         return $content;
 666 } #}}}
 667
 668 sub linkify ($$$) { #{{{
 669         my $page=shift;
 670         my $destpage=shift;
 671         my $content=shift;
 672
 673         run_hooks(linkify => sub {
 674                 $content=shift->(
 675                         page => $page,
 676                         destpage => $destpage,
 677                         content => $content,
 678                 );
 679         });
 680
 681         return $content;
 682 } #}}}
 683
 684 my %preprocessing;
 685 our $preprocess_preview=0;
 686 sub preprocess ($$$;$$) { #{{{
 687         my $page=shift; # the page the data comes from
 688         my $destpage=shift; # the page the data will appear in (different for inline)
 689         my $content=shift;
 690         my $scan=shift;
 691         my $preview=shift;
 692
 693         # Using local because it needs to be set within any nested calls
 694         # of this function.
 695         local $preprocess_preview=$preview if defined $preview;
 696
 697         my $handle=sub {
 698                 my $escape=shift;
 699                 my $prefix=shift;
 700                 my $command=shift;
 701                 my $params=shift;
 702                 if (length $escape) {
 703                         return "[[$prefix$command $params]]";
 704                 }
 705                 elsif (exists $hooks{preprocess}{$command}) {
 706                         return "" if $scan && ! $hooks{preprocess}{$command}{scan};
 707                         # Note: preserve order of params, some plugins may
 708                         # consider it significant.
 709                         my @params;
 710                         while ($params =~ m{
 711                                 (?:([-\w]+)=)?          # 1: named parameter key?
 712                                 (?:
 713                                         """(.*?)"""     # 2: triple-quoted value
 714                                 |
 715                                         "([^"]+)"       # 3: single-quoted value
 716                                 |
 717                                         (\S+)           # 4: unquoted value
 718                                 )
 719                                 (?:\s+|$)               # delimiter to next param
 720                         }sgx) {
 721                                 my $key=$1;
 722                                 my $val;
 723                                 if (defined $2) {
 724                                         $val=$2;
 725                                         $val=~s/\r\n/\n/mg;
 726                                         $val=~s/^\n+//g;
 727                                         $val=~s/\n+$//g;
 728                                 }
 729                                 elsif (defined $3) {
 730                                         $val=$3;
 731                                 }
 732                                 elsif (defined $4) {
 733                                         $val=$4;
 734                                 }
 735
 736                                 if (defined $key) {
 737                                         push @params, $key, $val;
 738                                 }
 739                                 else {
 740                                         push @params, $val, '';
 741                                 }
 742                         }
 743                         if ($preprocessing{$page}++ > 3) {
 744                                 # Avoid loops of preprocessed pages preprocessing
 745                                 # other pages that preprocess them, etc.
 746                                 #translators: The first parameter is a
 747                                 #translators: preprocessor directive name,
 748                                 #translators: the second a page name, the
 749                                 #translators: third a number.
 750                                 return "[[".sprintf(gettext("%s preprocessing loop detected on %s at depth %i"),
 751                                         $command, $page, $preprocessing{$page}).
 752                                 "]]";
 753                         }
 754                         my $ret;
 755                         if (! $scan) {
 756                                 $ret=$hooks{preprocess}{$command}{call}->(
 757                                         @params,
 758                                         page => $page,
 759                                         destpage => $destpage,
 760                                         preview => $preprocess_preview,
 761                                 );
 762                         }
 763                         else {
 764                                 # use void context during scan pass
 765                                 $hooks{preprocess}{$command}{call}->(
 766                                         @params,
 767                                         page => $page,
 768                                         destpage => $destpage,
 769                                         preview => $preprocess_preview,
 770                                 );
 771                                 $ret="";
 772                         }
 773                         $preprocessing{$page}--;
 774                         return $ret;
 775                 }
 776                 else {
 777                         return "[[$prefix$command $params]]";
 778                 }
 779         };
 780
 781         my $regex;
 782         if ($config{prefix_directives}) {
 783                 $regex = qr{
 784                         (\\?)           # 1: escape?
 785                         \[\[(!)         # directive open; 2: prefix
 786                         ([-\w]+)        # 3: command
 787                         (               # 4: the parameters..
 788                                 \s+     # Must have space if parameters present
 789                                 (?:
 790                                         (?:[-\w]+=)?            # named parameter key?
 791                                         (?:
 792                                                 """.*?"""       # triple-quoted value
 793                                                 |
 794                                                 "[^"]+"         # single-quoted value
 795                                                 |
 796                                                 [^\s\]]+        # unquoted value
 797                                         )
 798                                         \s*                     # whitespace or end
 799                                                                 # of directive
 800                                 )
 801                         *)?             # 0 or more parameters
 802                         \]\]            # directive closed
 803                 }sx;
 804         } else {
 805                 $regex = qr{
 806                         (\\?)           # 1: escape?
 807                         \[\[(!?)        # directive open; 2: optional prefix
 808                         ([-\w]+)        # 3: command
 809                         \s+
 810                         (               # 4: the parameters..
 811                                 (?:
 812                                         (?:[-\w]+=)?            # named parameter key?
 813                                         (?:
 814                                                 """.*?"""       # triple-quoted value
 815                                                 |
 816                                                 "[^"]+"         # single-quoted value
 817                                                 |
 818                                                 [^\s\]]+        # unquoted value
 819                                         )
 820                                         \s*                     # whitespace or end
 821                                                                 # of directive
 822                                 )
 823                         *)              # 0 or more parameters
 824                         \]\]            # directive closed
 825                 }sx;
 826         }
 827
 828         $content =~ s{$regex}{$handle->($1, $2, $3, $4)}eg;
 829         return $content;
 830 } #}}}
 831
 832 sub filter ($$$) { #{{{
 833         my $page=shift;
 834         my $destpage=shift;
 835         my $content=shift;
 836
 837         run_hooks(filter => sub {
 838                 $content=shift->(page => $page, destpage => $destpage,
 839                         content => $content);
 840         });
 841
 842         return $content;
 843 } #}}}
 844
 845 sub indexlink () { #{{{
 846         return "<a href=\"$config{url}\">$config{wikiname}</a>";
 847 } #}}}
 848
 849 my $wikilock;
 850
 851 sub lockwiki (;$) { #{{{
 852         my $wait=@_ ? shift : 1;
 853         # Take an exclusive lock on the wiki to prevent multiple concurrent
 854         # run issues. The lock will be dropped on program exit.
 855         if (! -d $config{wikistatedir}) {
 856                 mkdir($config{wikistatedir});
 857         }
 858         open($wikilock, '>', "$config{wikistatedir}/lockfile") ||
 859                 error ("cannot write to $config{wikistatedir}/lockfile: $!");
 860         if (! flock($wikilock, 2 | 4)) { # LOCK_EX | LOCK_NB
 861                 if ($wait) {
 862                         debug("wiki seems to be locked, waiting for lock");
 863                         my $wait=600; # arbitrary, but don't hang forever to
 864                                       # prevent process pileup
 865                         for (1..$wait) {
 866                                 return if flock($wikilock, 2 | 4);
 867                                 sleep 1;
 868                         }
 869                         error("wiki is locked; waited $wait seconds without lock being freed (possible stuck process or stale lock?)");
 870                 }
 871                 else {
 872                         return 0;
 873                 }
 874         }
 875         return 1;
 876 } #}}}
 877
 878 sub unlockwiki () { #{{{
 879         return close($wikilock) if $wikilock;
 880         return;
 881 } #}}}
 882
 883 my $commitlock;
 884
 885 sub commit_hook_enabled () { #{{{
 886         open($commitlock, '+>', "$config{wikistatedir}/commitlock") ||
 887                 error("cannot write to $config{wikistatedir}/commitlock: $!");
 888         if (! flock($commitlock, 1 | 4)) { # LOCK_SH | LOCK_NB to test
 889                 close($commitlock) || error("failed closing commitlock: $!");
 890                 return 0;
 891         }
 892         close($commitlock) || error("failed closing commitlock: $!");
 893         return 1;
 894 } #}}}
 895
 896 sub disable_commit_hook () { #{{{
 897         open($commitlock, '>', "$config{wikistatedir}/commitlock") ||
 898                 error("cannot write to $config{wikistatedir}/commitlock: $!");
 899         if (! flock($commitlock, 2)) { # LOCK_EX
 900                 error("failed to get commit lock");
 901         }
 902         return 1;
 903 } #}}}
 904
 905 sub enable_commit_hook () { #{{{
 906         return close($commitlock) if $commitlock;
 907         return;
 908 } #}}}
 909
 910 sub loadindex () { #{{{
 911         %oldrenderedfiles=%pagectime=();
 912         if (! $config{rebuild}) {
 913                 %pagesources=%pagemtime=%oldlinks=%links=%depends=
 914                 %destsources=%renderedfiles=%pagecase=%pagestate=();
 915         }
 916         my $in;
 917         if (! open ($in, "<", "$config{wikistatedir}/indexdb")) {
 918                 if (-e "$config{wikistatedir}/index") {
 919                         system("ikiwiki-transition", "indexdb", $config{srcdir});
 920                         open ($in, "<", "$config{wikistatedir}/indexdb") || return;
 921                 }
 922                 else {
 923                         return;
 924                 }
 925         }
 926         my $ret=Storable::fd_retrieve($in);
 927         if (! defined $ret) {
 928                 return 0;
 929         }
 930         my %index=%$ret;
 931         foreach my $src (keys %index) {
 932                 my %d=%{$index{$src}};
 933                 my $page=pagename($src);
 934                 $pagectime{$page}=$d{ctime};
 935                 if (! $config{rebuild}) {
 936                         $pagesources{$page}=$src;
 937                         $pagemtime{$page}=$d{mtime};
 938                         $renderedfiles{$page}=$d{dest};
 939                         if (exists $d{links} && ref $d{links}) {
 940                                 $links{$page}=$d{links};
 941                                 $oldlinks{$page}=[@{$d{links}}];
 942                         }
 943                         if (exists $d{depends}) {
 944                                 $depends{$page}=$d{depends};
 945                         }
 946                         if (exists $d{state}) {
 947                                 $pagestate{$page}=$d{state};
 948                         }
 949                 }
 950                 $oldrenderedfiles{$page}=[@{$d{dest}}];
 951         }
 952         foreach my $page (keys %pagesources) {
 953                 $pagecase{lc $page}=$page;
 954         }
 955         foreach my $page (keys %renderedfiles) {
 956                 $destsources{$_}=$page foreach @{$renderedfiles{$page}};
 957         }
 958         return close($in);
 959 } #}}}
 960
 961 sub saveindex () { #{{{
 962         run_hooks(savestate => sub { shift->() });
 963
 964         my %hookids;
 965         foreach my $type (keys %hooks) {
 966                 $hookids{$_}=1 foreach keys %{$hooks{$type}};
 967         }
 968         my @hookids=keys %hookids;
 969
 970         if (! -d $config{wikistatedir}) {
 971                 mkdir($config{wikistatedir});
 972         }
 973         my $newfile="$config{wikistatedir}/indexdb.new";
 974         my $cleanup = sub { unlink($newfile) };
 975         open (my $out, '>', $newfile) || error("cannot write to $newfile: $!", $cleanup);
 976         my %index;
 977         foreach my $page (keys %pagemtime) {
 978                 next unless $pagemtime{$page};
 979                 my $src=$pagesources{$page};
 980
 981                 $index{$src}={
 982                         ctime => $pagectime{$page},
 983                         mtime => $pagemtime{$page},
 984                         dest => $renderedfiles{$page},
 985                         links => $links{$page},
 986                 };
 987
 988                 if (exists $depends{$page}) {
 989                         $index{$src}{depends} = $depends{$page};
 990                 }
 991
 992                 if (exists $pagestate{$page}) {
 993                         foreach my $id (@hookids) {
 994                                 foreach my $key (keys %{$pagestate{$page}{$id}}) {
 995                                         $index{$src}{state}{$id}{$key}=$pagestate{$page}{$id}{$key};
 996                                 }
 997                         }
 998                 }
 999         }
1000         my $ret=Storable::nstore_fd(\%index, $out);
1001         return if ! defined $ret || ! $ret;
1002         close $out || error("failed saving to $newfile: $!", $cleanup);
1003         rename($newfile, "$config{wikistatedir}/indexdb") ||
1004                 error("failed renaming $newfile to $config{wikistatedir}/indexdb", $cleanup);
1005
1006         return 1;
1007 } #}}}
1008
1009 sub template_file ($) { #{{{
1010         my $template=shift;
1011
1012         foreach my $dir ($config{templatedir}, "$installdir/share/ikiwiki/templates") {
1013                 return "$dir/$template" if -e "$dir/$template";
1014         }
1015         return;
1016 } #}}}
1017
1018 sub template_params (@) { #{{{
1019         my $filename=template_file(shift);
1020
1021         if (! defined $filename) {
1022                 return if wantarray;
1023                 return "";
1024         }
1025
1026         my @ret=(
1027                 filter => sub {
1028                         my $text_ref = shift;
1029                         ${$text_ref} = decode_utf8(${$text_ref});
1030                 },
1031                 filename => $filename,
1032                 loop_context_vars => 1,
1033                 die_on_bad_params => 0,
1034                 @_
1035         );
1036         return wantarray ? @ret : {@ret};
1037 } #}}}
1038
1039 sub template ($;@) { #{{{
1040         require HTML::Template;
1041         return HTML::Template->new(template_params(@_));
1042 } #}}}
1043
1044 sub misctemplate ($$;@) { #{{{
1045         my $title=shift;
1046         my $pagebody=shift;
1047
1048         my $template=template("misc.tmpl");
1049         $template->param(
1050                 title => $title,
1051                 indexlink => indexlink(),
1052                 wikiname => $config{wikiname},
1053                 pagebody => $pagebody,
1054                 baseurl => baseurl(),
1055                 @_,
1056         );
1057         run_hooks(pagetemplate => sub {
1058                 shift->(page => "", destpage => "", template => $template);
1059         });
1060         return $template->output;
1061 }#}}}
1062
1063 sub hook (@) { # {{{
1064         my %param=@_;
1065
1066         if (! exists $param{type} || ! ref $param{call} || ! exists $param{id}) {
1067                 error 'hook requires type, call, and id parameters';
1068         }
1069
1070         return if $param{no_override} && exists $hooks{$param{type}}{$param{id}};
1071
1072         $hooks{$param{type}}{$param{id}}=\%param;
1073         return 1;
1074 } # }}}
1075
1076 sub run_hooks ($$) { # {{{
1077         # Calls the given sub for each hook of the given type,
1078         # passing it the hook function to call.
1079         my $type=shift;
1080         my $sub=shift;
1081
1082         if (exists $hooks{$type}) {
1083                 my @deferred;
1084                 foreach my $id (keys %{$hooks{$type}}) {
1085                         if ($hooks{$type}{$id}{last}) {
1086                                 push @deferred, $id;
1087                                 next;
1088                         }
1089                         $sub->($hooks{$type}{$id}{call});
1090                 }
1091                 foreach my $id (@deferred) {
1092                         $sub->($hooks{$type}{$id}{call});
1093                 }
1094         }
1095
1096         return 1;
1097 } #}}}
1098
1099 sub globlist_to_pagespec ($) { #{{{
1100         my @globlist=split(' ', shift);
1101
1102         my (@spec, @skip);
1103         foreach my $glob (@globlist) {
1104                 if ($glob=~/^!(.*)/) {
1105                         push @skip, $glob;
1106                 }
1107                 else {
1108                         push @spec, $glob;
1109                 }
1110         }
1111
1112         my $spec=join(' or ', @spec);
1113         if (@skip) {
1114                 my $skip=join(' and ', @skip);
1115                 if (length $spec) {
1116                         $spec="$skip and ($spec)";
1117                 }
1118                 else {
1119                         $spec=$skip;
1120                 }
1121         }
1122         return $spec;
1123 } #}}}
1124
1125 sub is_globlist ($) { #{{{
1126         my $s=shift;
1127         return ( $s =~ /[^\s]+\s+([^\s]+)/ && $1 ne "and" && $1 ne "or" );
1128 } #}}}
1129
1130 sub safequote ($) { #{{{
1131         my $s=shift;
1132         $s=~s/[{}]//g;
1133         return "q{$s}";
1134 } #}}}
1135
1136 sub add_depends ($$) { #{{{
1137         my $page=shift;
1138         my $pagespec=shift;
1139
1140         return unless pagespec_valid($pagespec);
1141
1142         if (! exists $depends{$page}) {
1143                 $depends{$page}=$pagespec;
1144         }
1145         else {
1146                 $depends{$page}=pagespec_merge($depends{$page}, $pagespec);
1147         }
1148
1149         return 1;
1150 } # }}}
1151
1152 sub file_pruned ($$) { #{{{
1153         require File::Spec;
1154         my $file=File::Spec->canonpath(shift);
1155         my $base=File::Spec->canonpath(shift);
1156         $file =~ s#^\Q$base\E/+##;
1157
1158         my $regexp='('.join('|', @{$config{wiki_file_prune_regexps}}).')';
1159         return $file =~ m/$regexp/ && $file ne $base;
1160 } #}}}
1161
1162 sub gettext { #{{{
1163         # Only use gettext in the rare cases it's needed.
1164         if ((exists $ENV{LANG} && length $ENV{LANG}) ||
1165             (exists $ENV{LC_ALL} && length $ENV{LC_ALL}) ||
1166             (exists $ENV{LC_MESSAGES} && length $ENV{LC_MESSAGES})) {
1167                 if (! $gettext_obj) {
1168                         $gettext_obj=eval q{
1169                                 use Locale::gettext q{textdomain};
1170                                 Locale::gettext->domain('ikiwiki')
1171                         };
1172                         if ($@) {
1173                                 print STDERR "$@";
1174                                 $gettext_obj=undef;
1175                                 return shift;
1176                         }
1177                 }
1178                 return $gettext_obj->get(shift);
1179         }
1180         else {
1181                 return shift;
1182         }
1183 } #}}}
1184
1185 sub pagespec_merge ($$) { #{{{
1186         my $a=shift;
1187         my $b=shift;
1188
1189         return $a if $a eq $b;
1190
1191         # Support for old-style GlobLists.
1192         if (is_globlist($a)) {
1193                 $a=globlist_to_pagespec($a);
1194         }
1195         if (is_globlist($b)) {
1196                 $b=globlist_to_pagespec($b);
1197         }
1198
1199         return "($a) or ($b)";
1200 } #}}}
1201
1202 sub pagespec_translate ($) { #{{{
1203         my $spec=shift;
1204
1205         # Support for old-style GlobLists.
1206         if (is_globlist($spec)) {
1207                 $spec=globlist_to_pagespec($spec);
1208         }
1209
1210         # Convert spec to perl code.
1211         my $code="";
1212         while ($spec=~m{
1213                 \s*             # ignore whitespace
1214                 (               # 1: match a single word
1215                         \!              # !
1216                 |
1217                         \(              # (
1218                 |
1219                         \)              # )
1220                 |
1221                         \w+\([^\)]*\)   # command(params)
1222                 |
1223                         [^\s()]+        # any other text
1224                 )
1225                 \s*             # ignore whitespace
1226         }igx) {
1227                 my $word=$1;
1228                 if (lc $word eq 'and') {
1229                         $code.=' &&';
1230                 }
1231                 elsif (lc $word eq 'or') {
1232                         $code.=' ||';
1233                 }
1234                 elsif ($word eq "(" || $word eq ")" || $word eq "!") {
1235                         $code.=' '.$word;
1236                 }
1237                 elsif ($word =~ /^(\w+)\((.*)\)$/) {
1238                         if (exists $IkiWiki::PageSpec::{"match_$1"}) {
1239                                 $code.="IkiWiki::PageSpec::match_$1(\$page, ".safequote($2).", \@_)";
1240                         }
1241                         else {
1242                                 $code.=' 0';
1243                         }
1244                 }
1245                 else {
1246                         $code.=" IkiWiki::PageSpec::match_glob(\$page, ".safequote($word).", \@_)";
1247                 }
1248         }
1249
1250         if (! length $code) {
1251                 $code=0;
1252         }
1253
1254         return eval 'sub { my $page=shift; '.$code.' }';
1255 } #}}}
1256
1257 sub pagespec_match ($$;@) { #{{{
1258         my $page=shift;
1259         my $spec=shift;
1260         my @params=@_;
1261
1262         # Backwards compatability with old calling convention.
1263         if (@params == 1) {
1264                 unshift @params, 'location';
1265         }
1266
1267         my $sub=pagespec_translate($spec);
1268         return IkiWiki::FailReason->new('syntax error') if $@;
1269         return $sub->($page, @params);
1270 } #}}}
1271
1272 sub pagespec_valid ($) { #{{{
1273         my $spec=shift;
1274
1275         my $sub=pagespec_translate($spec);
1276         return ! $@;
1277 } #}}}
1278
1279 package IkiWiki::FailReason;
1280
1281 use overload ( #{{{
1282         '""'    => sub { ${$_[0]} },
1283         '0+'    => sub { 0 },
1284         '!'     => sub { bless $_[0], 'IkiWiki::SuccessReason'},
1285         fallback => 1,
1286 ); #}}}
1287
1288 sub new { #{{{
1289         return bless \$_[1], $_[0];
1290 } #}}}
1291
1292 package IkiWiki::SuccessReason;
1293
1294 use overload ( #{{{
1295         '""'    => sub { ${$_[0]} },
1296         '0+'    => sub { 1 },
1297         '!'     => sub { bless $_[0], 'IkiWiki::FailReason'},
1298         fallback => 1,
1299 ); #}}}
1300
1301 sub new { #{{{
1302         return bless \$_[1], $_[0];
1303 }; #}}}
1304
1305 package IkiWiki::PageSpec;
1306
1307 sub match_glob ($$;@) { #{{{
1308         my $page=shift;
1309         my $glob=shift;
1310         my %params=@_;
1311
1312         my $from=exists $params{location} ? $params{location} : '';
1313
1314         # relative matching
1315         if ($glob =~ m!^\./!) {
1316                 $from=~s#/?[^/]+$##;
1317                 $glob=~s#^\./##;
1318                 $glob="$from/$glob" if length $from;
1319         }
1320
1321         # turn glob into safe regexp
1322         $glob=quotemeta($glob);
1323         $glob=~s/\\\*/.*/g;
1324         $glob=~s/\\\?/./g;
1325
1326         if ($page=~/^$glob$/i) {
1327                 if (! IkiWiki::isinternal($page) || $params{internal}) {
1328                         return IkiWiki::SuccessReason->new("$glob matches $page");
1329                 }
1330                 else {
1331                         return IkiWiki::FailReason->new("$glob matches $page, but the page is an internal page");
1332                 }
1333         }
1334         else {
1335                 return IkiWiki::FailReason->new("$glob does not match $page");
1336         }
1337 } #}}}
1338
1339 sub match_internal ($$;@) { #{{{
1340         return match_glob($_[0], $_[1], @_, internal => 1)
1341 } #}}}
1342
1343 sub match_link ($$;@) { #{{{
1344         my $page=shift;
1345         my $link=lc(shift);
1346         my %params=@_;
1347
1348         my $from=exists $params{location} ? $params{location} : '';
1349
1350         # relative matching
1351         if ($link =~ m!^\.! && defined $from) {
1352                 $from=~s#/?[^/]+$##;
1353                 $link=~s#^\./##;
1354                 $link="$from/$link" if length $from;
1355         }
1356
1357         my $links = $IkiWiki::links{$page};
1358         return IkiWiki::FailReason->new("$page has no links") unless $links && @{$links};
1359         my $bestlink = IkiWiki::bestlink($from, $link);
1360         foreach my $p (@{$links}) {
1361                 if (length $bestlink) {
1362                         return IkiWiki::SuccessReason->new("$page links to $link")
1363                                 if $bestlink eq IkiWiki::bestlink($page, $p);
1364                 }
1365                 else {
1366                         return IkiWiki::SuccessReason->new("$page links to page $p matching $link")
1367                                 if match_glob($p, $link, %params);
1368                 }
1369         }
1370         return IkiWiki::FailReason->new("$page does not link to $link");
1371 } #}}}
1372
1373 sub match_backlink ($$;@) { #{{{
1374         return match_link($_[1], $_[0], @_);
1375 } #}}}
1376
1377 sub match_created_before ($$;@) { #{{{
1378         my $page=shift;
1379         my $testpage=shift;
1380
1381         if (exists $IkiWiki::pagectime{$testpage}) {
1382                 if ($IkiWiki::pagectime{$page} < $IkiWiki::pagectime{$testpage}) {
1383                         return IkiWiki::SuccessReason->new("$page created before $testpage");
1384                 }
1385                 else {
1386                         return IkiWiki::FailReason->new("$page not created before $testpage");
1387                 }
1388         }
1389         else {
1390                 return IkiWiki::FailReason->new("$testpage has no ctime");
1391         }
1392 } #}}}
1393
1394 sub match_created_after ($$;@) { #{{{
1395         my $page=shift;
1396         my $testpage=shift;
1397
1398         if (exists $IkiWiki::pagectime{$testpage}) {
1399                 if ($IkiWiki::pagectime{$page} > $IkiWiki::pagectime{$testpage}) {
1400                         return IkiWiki::SuccessReason->new("$page created after $testpage");
1401                 }
1402                 else {
1403                         return IkiWiki::FailReason->new("$page not created after $testpage");
1404                 }
1405         }
1406         else {
1407                 return IkiWiki::FailReason->new("$testpage has no ctime");
1408         }
1409 } #}}}
1410
1411 sub match_creation_day ($$;@) { #{{{
1412         if ((gmtime($IkiWiki::pagectime{shift()}))[3] == shift) {
1413                 return IkiWiki::SuccessReason->new('creation_day matched');
1414         }
1415         else {
1416                 return IkiWiki::FailReason->new('creation_day did not match');
1417         }
1418 } #}}}
1419
1420 sub match_creation_month ($$;@) { #{{{
1421         if ((gmtime($IkiWiki::pagectime{shift()}))[4] + 1 == shift) {
1422                 return IkiWiki::SuccessReason->new('creation_month matched');
1423         }
1424         else {
1425                 return IkiWiki::FailReason->new('creation_month did not match');
1426         }
1427 } #}}}
1428
1429 sub match_creation_year ($$;@) { #{{{
1430         if ((gmtime($IkiWiki::pagectime{shift()}))[5] + 1900 == shift) {
1431                 return IkiWiki::SuccessReason->new('creation_year matched');
1432         }
1433         else {
1434                 return IkiWiki::FailReason->new('creation_year did not match');
1435         }
1436 } #}}}
1437
1438 1